xref: /openbmc/linux/drivers/scsi/ipr.c (revision 8b235f2f)
1 /*
2  * ipr.c -- driver for IBM Power Linux RAID adapters
3  *
4  * Written By: Brian King <brking@us.ibm.com>, IBM Corporation
5  *
6  * Copyright (C) 2003, 2004 IBM Corporation
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
21  *
22  */
23 
24 /*
25  * Notes:
26  *
27  * This driver is used to control the following SCSI adapters:
28  *
29  * IBM iSeries: 5702, 5703, 2780, 5709, 570A, 570B
30  *
31  * IBM pSeries: PCI-X Dual Channel Ultra 320 SCSI RAID Adapter
32  *              PCI-X Dual Channel Ultra 320 SCSI Adapter
33  *              PCI-X Dual Channel Ultra 320 SCSI RAID Enablement Card
34  *              Embedded SCSI adapter on p615 and p655 systems
35  *
36  * Supported Hardware Features:
37  *	- Ultra 320 SCSI controller
38  *	- PCI-X host interface
39  *	- Embedded PowerPC RISC Processor and Hardware XOR DMA Engine
40  *	- Non-Volatile Write Cache
41  *	- Supports attachment of non-RAID disks, tape, and optical devices
42  *	- RAID Levels 0, 5, 10
43  *	- Hot spare
44  *	- Background Parity Checking
45  *	- Background Data Scrubbing
46  *	- Ability to increase the capacity of an existing RAID 5 disk array
47  *		by adding disks
48  *
49  * Driver Features:
50  *	- Tagged command queuing
51  *	- Adapter microcode download
52  *	- PCI hot plug
53  *	- SCSI device hot plug
54  *
55  */
56 
57 #include <linux/fs.h>
58 #include <linux/init.h>
59 #include <linux/types.h>
60 #include <linux/errno.h>
61 #include <linux/kernel.h>
62 #include <linux/slab.h>
63 #include <linux/vmalloc.h>
64 #include <linux/ioport.h>
65 #include <linux/delay.h>
66 #include <linux/pci.h>
67 #include <linux/wait.h>
68 #include <linux/spinlock.h>
69 #include <linux/sched.h>
70 #include <linux/interrupt.h>
71 #include <linux/blkdev.h>
72 #include <linux/firmware.h>
73 #include <linux/module.h>
74 #include <linux/moduleparam.h>
75 #include <linux/libata.h>
76 #include <linux/hdreg.h>
77 #include <linux/reboot.h>
78 #include <linux/stringify.h>
79 #include <asm/io.h>
80 #include <asm/irq.h>
81 #include <asm/processor.h>
82 #include <scsi/scsi.h>
83 #include <scsi/scsi_host.h>
84 #include <scsi/scsi_tcq.h>
85 #include <scsi/scsi_eh.h>
86 #include <scsi/scsi_cmnd.h>
87 #include "ipr.h"
88 
89 /*
90  *   Global Data
91  */
92 static LIST_HEAD(ipr_ioa_head);
93 static unsigned int ipr_log_level = IPR_DEFAULT_LOG_LEVEL;
94 static unsigned int ipr_max_speed = 1;
95 static int ipr_testmode = 0;
96 static unsigned int ipr_fastfail = 0;
97 static unsigned int ipr_transop_timeout = 0;
98 static unsigned int ipr_debug = 0;
99 static unsigned int ipr_max_devs = IPR_DEFAULT_SIS64_DEVS;
100 static unsigned int ipr_dual_ioa_raid = 1;
101 static unsigned int ipr_number_of_msix = 2;
102 static unsigned int ipr_fast_reboot;
103 static DEFINE_SPINLOCK(ipr_driver_lock);
104 
105 /* This table describes the differences between DMA controller chips */
106 static const struct ipr_chip_cfg_t ipr_chip_cfg[] = {
107 	{ /* Gemstone, Citrine, Obsidian, and Obsidian-E */
108 		.mailbox = 0x0042C,
109 		.max_cmds = 100,
110 		.cache_line_size = 0x20,
111 		.clear_isr = 1,
112 		.iopoll_weight = 0,
113 		{
114 			.set_interrupt_mask_reg = 0x0022C,
115 			.clr_interrupt_mask_reg = 0x00230,
116 			.clr_interrupt_mask_reg32 = 0x00230,
117 			.sense_interrupt_mask_reg = 0x0022C,
118 			.sense_interrupt_mask_reg32 = 0x0022C,
119 			.clr_interrupt_reg = 0x00228,
120 			.clr_interrupt_reg32 = 0x00228,
121 			.sense_interrupt_reg = 0x00224,
122 			.sense_interrupt_reg32 = 0x00224,
123 			.ioarrin_reg = 0x00404,
124 			.sense_uproc_interrupt_reg = 0x00214,
125 			.sense_uproc_interrupt_reg32 = 0x00214,
126 			.set_uproc_interrupt_reg = 0x00214,
127 			.set_uproc_interrupt_reg32 = 0x00214,
128 			.clr_uproc_interrupt_reg = 0x00218,
129 			.clr_uproc_interrupt_reg32 = 0x00218
130 		}
131 	},
132 	{ /* Snipe and Scamp */
133 		.mailbox = 0x0052C,
134 		.max_cmds = 100,
135 		.cache_line_size = 0x20,
136 		.clear_isr = 1,
137 		.iopoll_weight = 0,
138 		{
139 			.set_interrupt_mask_reg = 0x00288,
140 			.clr_interrupt_mask_reg = 0x0028C,
141 			.clr_interrupt_mask_reg32 = 0x0028C,
142 			.sense_interrupt_mask_reg = 0x00288,
143 			.sense_interrupt_mask_reg32 = 0x00288,
144 			.clr_interrupt_reg = 0x00284,
145 			.clr_interrupt_reg32 = 0x00284,
146 			.sense_interrupt_reg = 0x00280,
147 			.sense_interrupt_reg32 = 0x00280,
148 			.ioarrin_reg = 0x00504,
149 			.sense_uproc_interrupt_reg = 0x00290,
150 			.sense_uproc_interrupt_reg32 = 0x00290,
151 			.set_uproc_interrupt_reg = 0x00290,
152 			.set_uproc_interrupt_reg32 = 0x00290,
153 			.clr_uproc_interrupt_reg = 0x00294,
154 			.clr_uproc_interrupt_reg32 = 0x00294
155 		}
156 	},
157 	{ /* CRoC */
158 		.mailbox = 0x00044,
159 		.max_cmds = 1000,
160 		.cache_line_size = 0x20,
161 		.clear_isr = 0,
162 		.iopoll_weight = 64,
163 		{
164 			.set_interrupt_mask_reg = 0x00010,
165 			.clr_interrupt_mask_reg = 0x00018,
166 			.clr_interrupt_mask_reg32 = 0x0001C,
167 			.sense_interrupt_mask_reg = 0x00010,
168 			.sense_interrupt_mask_reg32 = 0x00014,
169 			.clr_interrupt_reg = 0x00008,
170 			.clr_interrupt_reg32 = 0x0000C,
171 			.sense_interrupt_reg = 0x00000,
172 			.sense_interrupt_reg32 = 0x00004,
173 			.ioarrin_reg = 0x00070,
174 			.sense_uproc_interrupt_reg = 0x00020,
175 			.sense_uproc_interrupt_reg32 = 0x00024,
176 			.set_uproc_interrupt_reg = 0x00020,
177 			.set_uproc_interrupt_reg32 = 0x00024,
178 			.clr_uproc_interrupt_reg = 0x00028,
179 			.clr_uproc_interrupt_reg32 = 0x0002C,
180 			.init_feedback_reg = 0x0005C,
181 			.dump_addr_reg = 0x00064,
182 			.dump_data_reg = 0x00068,
183 			.endian_swap_reg = 0x00084
184 		}
185 	},
186 };
187 
188 static const struct ipr_chip_t ipr_chip[] = {
189 	{ PCI_VENDOR_ID_MYLEX, PCI_DEVICE_ID_IBM_GEMSTONE, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
190 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
191 	{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_OBSIDIAN, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
192 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
193 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN_E, IPR_USE_MSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
194 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_SNIPE, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[1] },
195 	{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_SCAMP, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[1] },
196 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROC_FPGA_E2, IPR_USE_MSI, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] },
197 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE, IPR_USE_MSI, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] }
198 };
199 
200 static int ipr_max_bus_speeds[] = {
201 	IPR_80MBs_SCSI_RATE, IPR_U160_SCSI_RATE, IPR_U320_SCSI_RATE
202 };
203 
204 MODULE_AUTHOR("Brian King <brking@us.ibm.com>");
205 MODULE_DESCRIPTION("IBM Power RAID SCSI Adapter Driver");
206 module_param_named(max_speed, ipr_max_speed, uint, 0);
207 MODULE_PARM_DESC(max_speed, "Maximum bus speed (0-2). Default: 1=U160. Speeds: 0=80 MB/s, 1=U160, 2=U320");
208 module_param_named(log_level, ipr_log_level, uint, 0);
209 MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver");
210 module_param_named(testmode, ipr_testmode, int, 0);
211 MODULE_PARM_DESC(testmode, "DANGEROUS!!! Allows unsupported configurations");
212 module_param_named(fastfail, ipr_fastfail, int, S_IRUGO | S_IWUSR);
213 MODULE_PARM_DESC(fastfail, "Reduce timeouts and retries");
214 module_param_named(transop_timeout, ipr_transop_timeout, int, 0);
215 MODULE_PARM_DESC(transop_timeout, "Time in seconds to wait for adapter to come operational (default: 300)");
216 module_param_named(debug, ipr_debug, int, S_IRUGO | S_IWUSR);
217 MODULE_PARM_DESC(debug, "Enable device driver debugging logging. Set to 1 to enable. (default: 0)");
218 module_param_named(dual_ioa_raid, ipr_dual_ioa_raid, int, 0);
219 MODULE_PARM_DESC(dual_ioa_raid, "Enable dual adapter RAID support. Set to 1 to enable. (default: 1)");
220 module_param_named(max_devs, ipr_max_devs, int, 0);
221 MODULE_PARM_DESC(max_devs, "Specify the maximum number of physical devices. "
222 		 "[Default=" __stringify(IPR_DEFAULT_SIS64_DEVS) "]");
223 module_param_named(number_of_msix, ipr_number_of_msix, int, 0);
224 MODULE_PARM_DESC(number_of_msix, "Specify the number of MSIX interrupts to use on capable adapters (1 - 16).  (default:2)");
225 module_param_named(fast_reboot, ipr_fast_reboot, int, S_IRUGO | S_IWUSR);
226 MODULE_PARM_DESC(fast_reboot, "Skip adapter shutdown during reboot. Set to 1 to enable. (default: 0)");
227 MODULE_LICENSE("GPL");
228 MODULE_VERSION(IPR_DRIVER_VERSION);
229 
230 /*  A constant array of IOASCs/URCs/Error Messages */
231 static const
232 struct ipr_error_table_t ipr_error_table[] = {
233 	{0x00000000, 1, IPR_DEFAULT_LOG_LEVEL,
234 	"8155: An unknown error was received"},
235 	{0x00330000, 0, 0,
236 	"Soft underlength error"},
237 	{0x005A0000, 0, 0,
238 	"Command to be cancelled not found"},
239 	{0x00808000, 0, 0,
240 	"Qualified success"},
241 	{0x01080000, 1, IPR_DEFAULT_LOG_LEVEL,
242 	"FFFE: Soft device bus error recovered by the IOA"},
243 	{0x01088100, 0, IPR_DEFAULT_LOG_LEVEL,
244 	"4101: Soft device bus fabric error"},
245 	{0x01100100, 0, IPR_DEFAULT_LOG_LEVEL,
246 	"FFFC: Logical block guard error recovered by the device"},
247 	{0x01100300, 0, IPR_DEFAULT_LOG_LEVEL,
248 	"FFFC: Logical block reference tag error recovered by the device"},
249 	{0x01108300, 0, IPR_DEFAULT_LOG_LEVEL,
250 	"4171: Recovered scatter list tag / sequence number error"},
251 	{0x01109000, 0, IPR_DEFAULT_LOG_LEVEL,
252 	"FF3D: Recovered logical block CRC error on IOA to Host transfer"},
253 	{0x01109200, 0, IPR_DEFAULT_LOG_LEVEL,
254 	"4171: Recovered logical block sequence number error on IOA to Host transfer"},
255 	{0x0110A000, 0, IPR_DEFAULT_LOG_LEVEL,
256 	"FFFD: Recovered logical block reference tag error detected by the IOA"},
257 	{0x0110A100, 0, IPR_DEFAULT_LOG_LEVEL,
258 	"FFFD: Logical block guard error recovered by the IOA"},
259 	{0x01170600, 0, IPR_DEFAULT_LOG_LEVEL,
260 	"FFF9: Device sector reassign successful"},
261 	{0x01170900, 0, IPR_DEFAULT_LOG_LEVEL,
262 	"FFF7: Media error recovered by device rewrite procedures"},
263 	{0x01180200, 0, IPR_DEFAULT_LOG_LEVEL,
264 	"7001: IOA sector reassignment successful"},
265 	{0x01180500, 0, IPR_DEFAULT_LOG_LEVEL,
266 	"FFF9: Soft media error. Sector reassignment recommended"},
267 	{0x01180600, 0, IPR_DEFAULT_LOG_LEVEL,
268 	"FFF7: Media error recovered by IOA rewrite procedures"},
269 	{0x01418000, 0, IPR_DEFAULT_LOG_LEVEL,
270 	"FF3D: Soft PCI bus error recovered by the IOA"},
271 	{0x01440000, 1, IPR_DEFAULT_LOG_LEVEL,
272 	"FFF6: Device hardware error recovered by the IOA"},
273 	{0x01448100, 0, IPR_DEFAULT_LOG_LEVEL,
274 	"FFF6: Device hardware error recovered by the device"},
275 	{0x01448200, 1, IPR_DEFAULT_LOG_LEVEL,
276 	"FF3D: Soft IOA error recovered by the IOA"},
277 	{0x01448300, 0, IPR_DEFAULT_LOG_LEVEL,
278 	"FFFA: Undefined device response recovered by the IOA"},
279 	{0x014A0000, 1, IPR_DEFAULT_LOG_LEVEL,
280 	"FFF6: Device bus error, message or command phase"},
281 	{0x014A8000, 0, IPR_DEFAULT_LOG_LEVEL,
282 	"FFFE: Task Management Function failed"},
283 	{0x015D0000, 0, IPR_DEFAULT_LOG_LEVEL,
284 	"FFF6: Failure prediction threshold exceeded"},
285 	{0x015D9200, 0, IPR_DEFAULT_LOG_LEVEL,
286 	"8009: Impending cache battery pack failure"},
287 	{0x02040100, 0, 0,
288 	"Logical Unit in process of becoming ready"},
289 	{0x02040200, 0, 0,
290 	"Initializing command required"},
291 	{0x02040400, 0, 0,
292 	"34FF: Disk device format in progress"},
293 	{0x02040C00, 0, 0,
294 	"Logical unit not accessible, target port in unavailable state"},
295 	{0x02048000, 0, IPR_DEFAULT_LOG_LEVEL,
296 	"9070: IOA requested reset"},
297 	{0x023F0000, 0, 0,
298 	"Synchronization required"},
299 	{0x02408500, 0, 0,
300 	"IOA microcode download required"},
301 	{0x02408600, 0, 0,
302 	"Device bus connection is prohibited by host"},
303 	{0x024E0000, 0, 0,
304 	"No ready, IOA shutdown"},
305 	{0x025A0000, 0, 0,
306 	"Not ready, IOA has been shutdown"},
307 	{0x02670100, 0, IPR_DEFAULT_LOG_LEVEL,
308 	"3020: Storage subsystem configuration error"},
309 	{0x03110B00, 0, 0,
310 	"FFF5: Medium error, data unreadable, recommend reassign"},
311 	{0x03110C00, 0, 0,
312 	"7000: Medium error, data unreadable, do not reassign"},
313 	{0x03310000, 0, IPR_DEFAULT_LOG_LEVEL,
314 	"FFF3: Disk media format bad"},
315 	{0x04050000, 0, IPR_DEFAULT_LOG_LEVEL,
316 	"3002: Addressed device failed to respond to selection"},
317 	{0x04080000, 1, IPR_DEFAULT_LOG_LEVEL,
318 	"3100: Device bus error"},
319 	{0x04080100, 0, IPR_DEFAULT_LOG_LEVEL,
320 	"3109: IOA timed out a device command"},
321 	{0x04088000, 0, 0,
322 	"3120: SCSI bus is not operational"},
323 	{0x04088100, 0, IPR_DEFAULT_LOG_LEVEL,
324 	"4100: Hard device bus fabric error"},
325 	{0x04100100, 0, IPR_DEFAULT_LOG_LEVEL,
326 	"310C: Logical block guard error detected by the device"},
327 	{0x04100300, 0, IPR_DEFAULT_LOG_LEVEL,
328 	"310C: Logical block reference tag error detected by the device"},
329 	{0x04108300, 1, IPR_DEFAULT_LOG_LEVEL,
330 	"4170: Scatter list tag / sequence number error"},
331 	{0x04109000, 1, IPR_DEFAULT_LOG_LEVEL,
332 	"8150: Logical block CRC error on IOA to Host transfer"},
333 	{0x04109200, 1, IPR_DEFAULT_LOG_LEVEL,
334 	"4170: Logical block sequence number error on IOA to Host transfer"},
335 	{0x0410A000, 0, IPR_DEFAULT_LOG_LEVEL,
336 	"310D: Logical block reference tag error detected by the IOA"},
337 	{0x0410A100, 0, IPR_DEFAULT_LOG_LEVEL,
338 	"310D: Logical block guard error detected by the IOA"},
339 	{0x04118000, 0, IPR_DEFAULT_LOG_LEVEL,
340 	"9000: IOA reserved area data check"},
341 	{0x04118100, 0, IPR_DEFAULT_LOG_LEVEL,
342 	"9001: IOA reserved area invalid data pattern"},
343 	{0x04118200, 0, IPR_DEFAULT_LOG_LEVEL,
344 	"9002: IOA reserved area LRC error"},
345 	{0x04118300, 1, IPR_DEFAULT_LOG_LEVEL,
346 	"Hardware Error, IOA metadata access error"},
347 	{0x04320000, 0, IPR_DEFAULT_LOG_LEVEL,
348 	"102E: Out of alternate sectors for disk storage"},
349 	{0x04330000, 1, IPR_DEFAULT_LOG_LEVEL,
350 	"FFF4: Data transfer underlength error"},
351 	{0x04338000, 1, IPR_DEFAULT_LOG_LEVEL,
352 	"FFF4: Data transfer overlength error"},
353 	{0x043E0100, 0, IPR_DEFAULT_LOG_LEVEL,
354 	"3400: Logical unit failure"},
355 	{0x04408500, 0, IPR_DEFAULT_LOG_LEVEL,
356 	"FFF4: Device microcode is corrupt"},
357 	{0x04418000, 1, IPR_DEFAULT_LOG_LEVEL,
358 	"8150: PCI bus error"},
359 	{0x04430000, 1, 0,
360 	"Unsupported device bus message received"},
361 	{0x04440000, 1, IPR_DEFAULT_LOG_LEVEL,
362 	"FFF4: Disk device problem"},
363 	{0x04448200, 1, IPR_DEFAULT_LOG_LEVEL,
364 	"8150: Permanent IOA failure"},
365 	{0x04448300, 0, IPR_DEFAULT_LOG_LEVEL,
366 	"3010: Disk device returned wrong response to IOA"},
367 	{0x04448400, 0, IPR_DEFAULT_LOG_LEVEL,
368 	"8151: IOA microcode error"},
369 	{0x04448500, 0, 0,
370 	"Device bus status error"},
371 	{0x04448600, 0, IPR_DEFAULT_LOG_LEVEL,
372 	"8157: IOA error requiring IOA reset to recover"},
373 	{0x04448700, 0, 0,
374 	"ATA device status error"},
375 	{0x04490000, 0, 0,
376 	"Message reject received from the device"},
377 	{0x04449200, 0, IPR_DEFAULT_LOG_LEVEL,
378 	"8008: A permanent cache battery pack failure occurred"},
379 	{0x0444A000, 0, IPR_DEFAULT_LOG_LEVEL,
380 	"9090: Disk unit has been modified after the last known status"},
381 	{0x0444A200, 0, IPR_DEFAULT_LOG_LEVEL,
382 	"9081: IOA detected device error"},
383 	{0x0444A300, 0, IPR_DEFAULT_LOG_LEVEL,
384 	"9082: IOA detected device error"},
385 	{0x044A0000, 1, IPR_DEFAULT_LOG_LEVEL,
386 	"3110: Device bus error, message or command phase"},
387 	{0x044A8000, 1, IPR_DEFAULT_LOG_LEVEL,
388 	"3110: SAS Command / Task Management Function failed"},
389 	{0x04670400, 0, IPR_DEFAULT_LOG_LEVEL,
390 	"9091: Incorrect hardware configuration change has been detected"},
391 	{0x04678000, 0, IPR_DEFAULT_LOG_LEVEL,
392 	"9073: Invalid multi-adapter configuration"},
393 	{0x04678100, 0, IPR_DEFAULT_LOG_LEVEL,
394 	"4010: Incorrect connection between cascaded expanders"},
395 	{0x04678200, 0, IPR_DEFAULT_LOG_LEVEL,
396 	"4020: Connections exceed IOA design limits"},
397 	{0x04678300, 0, IPR_DEFAULT_LOG_LEVEL,
398 	"4030: Incorrect multipath connection"},
399 	{0x04679000, 0, IPR_DEFAULT_LOG_LEVEL,
400 	"4110: Unsupported enclosure function"},
401 	{0x04679800, 0, IPR_DEFAULT_LOG_LEVEL,
402 	"4120: SAS cable VPD cannot be read"},
403 	{0x046E0000, 0, IPR_DEFAULT_LOG_LEVEL,
404 	"FFF4: Command to logical unit failed"},
405 	{0x05240000, 1, 0,
406 	"Illegal request, invalid request type or request packet"},
407 	{0x05250000, 0, 0,
408 	"Illegal request, invalid resource handle"},
409 	{0x05258000, 0, 0,
410 	"Illegal request, commands not allowed to this device"},
411 	{0x05258100, 0, 0,
412 	"Illegal request, command not allowed to a secondary adapter"},
413 	{0x05258200, 0, 0,
414 	"Illegal request, command not allowed to a non-optimized resource"},
415 	{0x05260000, 0, 0,
416 	"Illegal request, invalid field in parameter list"},
417 	{0x05260100, 0, 0,
418 	"Illegal request, parameter not supported"},
419 	{0x05260200, 0, 0,
420 	"Illegal request, parameter value invalid"},
421 	{0x052C0000, 0, 0,
422 	"Illegal request, command sequence error"},
423 	{0x052C8000, 1, 0,
424 	"Illegal request, dual adapter support not enabled"},
425 	{0x052C8100, 1, 0,
426 	"Illegal request, another cable connector was physically disabled"},
427 	{0x054E8000, 1, 0,
428 	"Illegal request, inconsistent group id/group count"},
429 	{0x06040500, 0, IPR_DEFAULT_LOG_LEVEL,
430 	"9031: Array protection temporarily suspended, protection resuming"},
431 	{0x06040600, 0, IPR_DEFAULT_LOG_LEVEL,
432 	"9040: Array protection temporarily suspended, protection resuming"},
433 	{0x060B0100, 0, IPR_DEFAULT_LOG_LEVEL,
434 	"4080: IOA exceeded maximum operating temperature"},
435 	{0x060B8000, 0, IPR_DEFAULT_LOG_LEVEL,
436 	"4085: Service required"},
437 	{0x06288000, 0, IPR_DEFAULT_LOG_LEVEL,
438 	"3140: Device bus not ready to ready transition"},
439 	{0x06290000, 0, IPR_DEFAULT_LOG_LEVEL,
440 	"FFFB: SCSI bus was reset"},
441 	{0x06290500, 0, 0,
442 	"FFFE: SCSI bus transition to single ended"},
443 	{0x06290600, 0, 0,
444 	"FFFE: SCSI bus transition to LVD"},
445 	{0x06298000, 0, IPR_DEFAULT_LOG_LEVEL,
446 	"FFFB: SCSI bus was reset by another initiator"},
447 	{0x063F0300, 0, IPR_DEFAULT_LOG_LEVEL,
448 	"3029: A device replacement has occurred"},
449 	{0x063F8300, 0, IPR_DEFAULT_LOG_LEVEL,
450 	"4102: Device bus fabric performance degradation"},
451 	{0x064C8000, 0, IPR_DEFAULT_LOG_LEVEL,
452 	"9051: IOA cache data exists for a missing or failed device"},
453 	{0x064C8100, 0, IPR_DEFAULT_LOG_LEVEL,
454 	"9055: Auxiliary cache IOA contains cache data needed by the primary IOA"},
455 	{0x06670100, 0, IPR_DEFAULT_LOG_LEVEL,
456 	"9025: Disk unit is not supported at its physical location"},
457 	{0x06670600, 0, IPR_DEFAULT_LOG_LEVEL,
458 	"3020: IOA detected a SCSI bus configuration error"},
459 	{0x06678000, 0, IPR_DEFAULT_LOG_LEVEL,
460 	"3150: SCSI bus configuration error"},
461 	{0x06678100, 0, IPR_DEFAULT_LOG_LEVEL,
462 	"9074: Asymmetric advanced function disk configuration"},
463 	{0x06678300, 0, IPR_DEFAULT_LOG_LEVEL,
464 	"4040: Incomplete multipath connection between IOA and enclosure"},
465 	{0x06678400, 0, IPR_DEFAULT_LOG_LEVEL,
466 	"4041: Incomplete multipath connection between enclosure and device"},
467 	{0x06678500, 0, IPR_DEFAULT_LOG_LEVEL,
468 	"9075: Incomplete multipath connection between IOA and remote IOA"},
469 	{0x06678600, 0, IPR_DEFAULT_LOG_LEVEL,
470 	"9076: Configuration error, missing remote IOA"},
471 	{0x06679100, 0, IPR_DEFAULT_LOG_LEVEL,
472 	"4050: Enclosure does not support a required multipath function"},
473 	{0x06679800, 0, IPR_DEFAULT_LOG_LEVEL,
474 	"4121: Configuration error, required cable is missing"},
475 	{0x06679900, 0, IPR_DEFAULT_LOG_LEVEL,
476 	"4122: Cable is not plugged into the correct location on remote IOA"},
477 	{0x06679A00, 0, IPR_DEFAULT_LOG_LEVEL,
478 	"4123: Configuration error, invalid cable vital product data"},
479 	{0x06679B00, 0, IPR_DEFAULT_LOG_LEVEL,
480 	"4124: Configuration error, both cable ends are plugged into the same IOA"},
481 	{0x06690000, 0, IPR_DEFAULT_LOG_LEVEL,
482 	"4070: Logically bad block written on device"},
483 	{0x06690200, 0, IPR_DEFAULT_LOG_LEVEL,
484 	"9041: Array protection temporarily suspended"},
485 	{0x06698200, 0, IPR_DEFAULT_LOG_LEVEL,
486 	"9042: Corrupt array parity detected on specified device"},
487 	{0x066B0200, 0, IPR_DEFAULT_LOG_LEVEL,
488 	"9030: Array no longer protected due to missing or failed disk unit"},
489 	{0x066B8000, 0, IPR_DEFAULT_LOG_LEVEL,
490 	"9071: Link operational transition"},
491 	{0x066B8100, 0, IPR_DEFAULT_LOG_LEVEL,
492 	"9072: Link not operational transition"},
493 	{0x066B8200, 0, IPR_DEFAULT_LOG_LEVEL,
494 	"9032: Array exposed but still protected"},
495 	{0x066B8300, 0, IPR_DEFAULT_LOG_LEVEL + 1,
496 	"70DD: Device forced failed by disrupt device command"},
497 	{0x066B9100, 0, IPR_DEFAULT_LOG_LEVEL,
498 	"4061: Multipath redundancy level got better"},
499 	{0x066B9200, 0, IPR_DEFAULT_LOG_LEVEL,
500 	"4060: Multipath redundancy level got worse"},
501 	{0x06808100, 0, IPR_DEFAULT_LOG_LEVEL,
502 	"9083: Device raw mode enabled"},
503 	{0x06808200, 0, IPR_DEFAULT_LOG_LEVEL,
504 	"9084: Device raw mode disabled"},
505 	{0x07270000, 0, 0,
506 	"Failure due to other device"},
507 	{0x07278000, 0, IPR_DEFAULT_LOG_LEVEL,
508 	"9008: IOA does not support functions expected by devices"},
509 	{0x07278100, 0, IPR_DEFAULT_LOG_LEVEL,
510 	"9010: Cache data associated with attached devices cannot be found"},
511 	{0x07278200, 0, IPR_DEFAULT_LOG_LEVEL,
512 	"9011: Cache data belongs to devices other than those attached"},
513 	{0x07278400, 0, IPR_DEFAULT_LOG_LEVEL,
514 	"9020: Array missing 2 or more devices with only 1 device present"},
515 	{0x07278500, 0, IPR_DEFAULT_LOG_LEVEL,
516 	"9021: Array missing 2 or more devices with 2 or more devices present"},
517 	{0x07278600, 0, IPR_DEFAULT_LOG_LEVEL,
518 	"9022: Exposed array is missing a required device"},
519 	{0x07278700, 0, IPR_DEFAULT_LOG_LEVEL,
520 	"9023: Array member(s) not at required physical locations"},
521 	{0x07278800, 0, IPR_DEFAULT_LOG_LEVEL,
522 	"9024: Array not functional due to present hardware configuration"},
523 	{0x07278900, 0, IPR_DEFAULT_LOG_LEVEL,
524 	"9026: Array not functional due to present hardware configuration"},
525 	{0x07278A00, 0, IPR_DEFAULT_LOG_LEVEL,
526 	"9027: Array is missing a device and parity is out of sync"},
527 	{0x07278B00, 0, IPR_DEFAULT_LOG_LEVEL,
528 	"9028: Maximum number of arrays already exist"},
529 	{0x07278C00, 0, IPR_DEFAULT_LOG_LEVEL,
530 	"9050: Required cache data cannot be located for a disk unit"},
531 	{0x07278D00, 0, IPR_DEFAULT_LOG_LEVEL,
532 	"9052: Cache data exists for a device that has been modified"},
533 	{0x07278F00, 0, IPR_DEFAULT_LOG_LEVEL,
534 	"9054: IOA resources not available due to previous problems"},
535 	{0x07279100, 0, IPR_DEFAULT_LOG_LEVEL,
536 	"9092: Disk unit requires initialization before use"},
537 	{0x07279200, 0, IPR_DEFAULT_LOG_LEVEL,
538 	"9029: Incorrect hardware configuration change has been detected"},
539 	{0x07279600, 0, IPR_DEFAULT_LOG_LEVEL,
540 	"9060: One or more disk pairs are missing from an array"},
541 	{0x07279700, 0, IPR_DEFAULT_LOG_LEVEL,
542 	"9061: One or more disks are missing from an array"},
543 	{0x07279800, 0, IPR_DEFAULT_LOG_LEVEL,
544 	"9062: One or more disks are missing from an array"},
545 	{0x07279900, 0, IPR_DEFAULT_LOG_LEVEL,
546 	"9063: Maximum number of functional arrays has been exceeded"},
547 	{0x07279A00, 0, 0,
548 	"Data protect, other volume set problem"},
549 	{0x0B260000, 0, 0,
550 	"Aborted command, invalid descriptor"},
551 	{0x0B3F9000, 0, 0,
552 	"Target operating conditions have changed, dual adapter takeover"},
553 	{0x0B530200, 0, 0,
554 	"Aborted command, medium removal prevented"},
555 	{0x0B5A0000, 0, 0,
556 	"Command terminated by host"},
557 	{0x0B5B8000, 0, 0,
558 	"Aborted command, command terminated by host"}
559 };
560 
561 static const struct ipr_ses_table_entry ipr_ses_table[] = {
562 	{ "2104-DL1        ", "XXXXXXXXXXXXXXXX", 80 },
563 	{ "2104-TL1        ", "XXXXXXXXXXXXXXXX", 80 },
564 	{ "HSBP07M P U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Hidive 7 slot */
565 	{ "HSBP05M P U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Hidive 5 slot */
566 	{ "HSBP05M S U2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* Bowtie */
567 	{ "HSBP06E ASU2SCSI", "XXXXXXXXXXXXXXXX", 80 }, /* MartinFenning */
568 	{ "2104-DU3        ", "XXXXXXXXXXXXXXXX", 160 },
569 	{ "2104-TU3        ", "XXXXXXXXXXXXXXXX", 160 },
570 	{ "HSBP04C RSU2SCSI", "XXXXXXX*XXXXXXXX", 160 },
571 	{ "HSBP06E RSU2SCSI", "XXXXXXX*XXXXXXXX", 160 },
572 	{ "St  V1S2        ", "XXXXXXXXXXXXXXXX", 160 },
573 	{ "HSBPD4M  PU3SCSI", "XXXXXXX*XXXXXXXX", 160 },
574 	{ "VSBPD1H   U3SCSI", "XXXXXXX*XXXXXXXX", 160 }
575 };
576 
577 /*
578  *  Function Prototypes
579  */
580 static int ipr_reset_alert(struct ipr_cmnd *);
581 static void ipr_process_ccn(struct ipr_cmnd *);
582 static void ipr_process_error(struct ipr_cmnd *);
583 static void ipr_reset_ioa_job(struct ipr_cmnd *);
584 static void ipr_initiate_ioa_reset(struct ipr_ioa_cfg *,
585 				   enum ipr_shutdown_type);
586 
587 #ifdef CONFIG_SCSI_IPR_TRACE
588 /**
589  * ipr_trc_hook - Add a trace entry to the driver trace
590  * @ipr_cmd:	ipr command struct
591  * @type:		trace type
592  * @add_data:	additional data
593  *
594  * Return value:
595  * 	none
596  **/
597 static void ipr_trc_hook(struct ipr_cmnd *ipr_cmd,
598 			 u8 type, u32 add_data)
599 {
600 	struct ipr_trace_entry *trace_entry;
601 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
602 	unsigned int trace_index;
603 
604 	trace_index = atomic_add_return(1, &ioa_cfg->trace_index) & IPR_TRACE_INDEX_MASK;
605 	trace_entry = &ioa_cfg->trace[trace_index];
606 	trace_entry->time = jiffies;
607 	trace_entry->op_code = ipr_cmd->ioarcb.cmd_pkt.cdb[0];
608 	trace_entry->type = type;
609 	if (ipr_cmd->ioa_cfg->sis64)
610 		trace_entry->ata_op_code = ipr_cmd->i.ata_ioadl.regs.command;
611 	else
612 		trace_entry->ata_op_code = ipr_cmd->ioarcb.u.add_data.u.regs.command;
613 	trace_entry->cmd_index = ipr_cmd->cmd_index & 0xff;
614 	trace_entry->res_handle = ipr_cmd->ioarcb.res_handle;
615 	trace_entry->u.add_data = add_data;
616 	wmb();
617 }
618 #else
619 #define ipr_trc_hook(ipr_cmd, type, add_data) do { } while (0)
620 #endif
621 
622 /**
623  * ipr_lock_and_done - Acquire lock and complete command
624  * @ipr_cmd:	ipr command struct
625  *
626  * Return value:
627  *	none
628  **/
629 static void ipr_lock_and_done(struct ipr_cmnd *ipr_cmd)
630 {
631 	unsigned long lock_flags;
632 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
633 
634 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
635 	ipr_cmd->done(ipr_cmd);
636 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
637 }
638 
639 /**
640  * ipr_reinit_ipr_cmnd - Re-initialize an IPR Cmnd block for reuse
641  * @ipr_cmd:	ipr command struct
642  *
643  * Return value:
644  * 	none
645  **/
646 static void ipr_reinit_ipr_cmnd(struct ipr_cmnd *ipr_cmd)
647 {
648 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
649 	struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
650 	struct ipr_ioasa64 *ioasa64 = &ipr_cmd->s.ioasa64;
651 	dma_addr_t dma_addr = ipr_cmd->dma_addr;
652 	int hrrq_id;
653 
654 	hrrq_id = ioarcb->cmd_pkt.hrrq_id;
655 	memset(&ioarcb->cmd_pkt, 0, sizeof(struct ipr_cmd_pkt));
656 	ioarcb->cmd_pkt.hrrq_id = hrrq_id;
657 	ioarcb->data_transfer_length = 0;
658 	ioarcb->read_data_transfer_length = 0;
659 	ioarcb->ioadl_len = 0;
660 	ioarcb->read_ioadl_len = 0;
661 
662 	if (ipr_cmd->ioa_cfg->sis64) {
663 		ioarcb->u.sis64_addr_data.data_ioadl_addr =
664 			cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ioadl64));
665 		ioasa64->u.gata.status = 0;
666 	} else {
667 		ioarcb->write_ioadl_addr =
668 			cpu_to_be32(dma_addr + offsetof(struct ipr_cmnd, i.ioadl));
669 		ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
670 		ioasa->u.gata.status = 0;
671 	}
672 
673 	ioasa->hdr.ioasc = 0;
674 	ioasa->hdr.residual_data_len = 0;
675 	ipr_cmd->scsi_cmd = NULL;
676 	ipr_cmd->qc = NULL;
677 	ipr_cmd->sense_buffer[0] = 0;
678 	ipr_cmd->dma_use_sg = 0;
679 }
680 
681 /**
682  * ipr_init_ipr_cmnd - Initialize an IPR Cmnd block
683  * @ipr_cmd:	ipr command struct
684  *
685  * Return value:
686  * 	none
687  **/
688 static void ipr_init_ipr_cmnd(struct ipr_cmnd *ipr_cmd,
689 			      void (*fast_done) (struct ipr_cmnd *))
690 {
691 	ipr_reinit_ipr_cmnd(ipr_cmd);
692 	ipr_cmd->u.scratch = 0;
693 	ipr_cmd->sibling = NULL;
694 	ipr_cmd->eh_comp = NULL;
695 	ipr_cmd->fast_done = fast_done;
696 	init_timer(&ipr_cmd->timer);
697 }
698 
699 /**
700  * __ipr_get_free_ipr_cmnd - Get a free IPR Cmnd block
701  * @ioa_cfg:	ioa config struct
702  *
703  * Return value:
704  * 	pointer to ipr command struct
705  **/
706 static
707 struct ipr_cmnd *__ipr_get_free_ipr_cmnd(struct ipr_hrr_queue *hrrq)
708 {
709 	struct ipr_cmnd *ipr_cmd = NULL;
710 
711 	if (likely(!list_empty(&hrrq->hrrq_free_q))) {
712 		ipr_cmd = list_entry(hrrq->hrrq_free_q.next,
713 			struct ipr_cmnd, queue);
714 		list_del(&ipr_cmd->queue);
715 	}
716 
717 
718 	return ipr_cmd;
719 }
720 
721 /**
722  * ipr_get_free_ipr_cmnd - Get a free IPR Cmnd block and initialize it
723  * @ioa_cfg:	ioa config struct
724  *
725  * Return value:
726  *	pointer to ipr command struct
727  **/
728 static
729 struct ipr_cmnd *ipr_get_free_ipr_cmnd(struct ipr_ioa_cfg *ioa_cfg)
730 {
731 	struct ipr_cmnd *ipr_cmd =
732 		__ipr_get_free_ipr_cmnd(&ioa_cfg->hrrq[IPR_INIT_HRRQ]);
733 	ipr_init_ipr_cmnd(ipr_cmd, ipr_lock_and_done);
734 	return ipr_cmd;
735 }
736 
737 /**
738  * ipr_mask_and_clear_interrupts - Mask all and clear specified interrupts
739  * @ioa_cfg:	ioa config struct
740  * @clr_ints:     interrupts to clear
741  *
742  * This function masks all interrupts on the adapter, then clears the
743  * interrupts specified in the mask
744  *
745  * Return value:
746  * 	none
747  **/
748 static void ipr_mask_and_clear_interrupts(struct ipr_ioa_cfg *ioa_cfg,
749 					  u32 clr_ints)
750 {
751 	volatile u32 int_reg;
752 	int i;
753 
754 	/* Stop new interrupts */
755 	for (i = 0; i < ioa_cfg->hrrq_num; i++) {
756 		spin_lock(&ioa_cfg->hrrq[i]._lock);
757 		ioa_cfg->hrrq[i].allow_interrupts = 0;
758 		spin_unlock(&ioa_cfg->hrrq[i]._lock);
759 	}
760 	wmb();
761 
762 	/* Set interrupt mask to stop all new interrupts */
763 	if (ioa_cfg->sis64)
764 		writeq(~0, ioa_cfg->regs.set_interrupt_mask_reg);
765 	else
766 		writel(~0, ioa_cfg->regs.set_interrupt_mask_reg);
767 
768 	/* Clear any pending interrupts */
769 	if (ioa_cfg->sis64)
770 		writel(~0, ioa_cfg->regs.clr_interrupt_reg);
771 	writel(clr_ints, ioa_cfg->regs.clr_interrupt_reg32);
772 	int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
773 }
774 
775 /**
776  * ipr_save_pcix_cmd_reg - Save PCI-X command register
777  * @ioa_cfg:	ioa config struct
778  *
779  * Return value:
780  * 	0 on success / -EIO on failure
781  **/
782 static int ipr_save_pcix_cmd_reg(struct ipr_ioa_cfg *ioa_cfg)
783 {
784 	int pcix_cmd_reg = pci_find_capability(ioa_cfg->pdev, PCI_CAP_ID_PCIX);
785 
786 	if (pcix_cmd_reg == 0)
787 		return 0;
788 
789 	if (pci_read_config_word(ioa_cfg->pdev, pcix_cmd_reg + PCI_X_CMD,
790 				 &ioa_cfg->saved_pcix_cmd_reg) != PCIBIOS_SUCCESSFUL) {
791 		dev_err(&ioa_cfg->pdev->dev, "Failed to save PCI-X command register\n");
792 		return -EIO;
793 	}
794 
795 	ioa_cfg->saved_pcix_cmd_reg |= PCI_X_CMD_DPERR_E | PCI_X_CMD_ERO;
796 	return 0;
797 }
798 
799 /**
800  * ipr_set_pcix_cmd_reg - Setup PCI-X command register
801  * @ioa_cfg:	ioa config struct
802  *
803  * Return value:
804  * 	0 on success / -EIO on failure
805  **/
806 static int ipr_set_pcix_cmd_reg(struct ipr_ioa_cfg *ioa_cfg)
807 {
808 	int pcix_cmd_reg = pci_find_capability(ioa_cfg->pdev, PCI_CAP_ID_PCIX);
809 
810 	if (pcix_cmd_reg) {
811 		if (pci_write_config_word(ioa_cfg->pdev, pcix_cmd_reg + PCI_X_CMD,
812 					  ioa_cfg->saved_pcix_cmd_reg) != PCIBIOS_SUCCESSFUL) {
813 			dev_err(&ioa_cfg->pdev->dev, "Failed to setup PCI-X command register\n");
814 			return -EIO;
815 		}
816 	}
817 
818 	return 0;
819 }
820 
821 /**
822  * ipr_sata_eh_done - done function for aborted SATA commands
823  * @ipr_cmd:	ipr command struct
824  *
825  * This function is invoked for ops generated to SATA
826  * devices which are being aborted.
827  *
828  * Return value:
829  * 	none
830  **/
831 static void ipr_sata_eh_done(struct ipr_cmnd *ipr_cmd)
832 {
833 	struct ata_queued_cmd *qc = ipr_cmd->qc;
834 	struct ipr_sata_port *sata_port = qc->ap->private_data;
835 
836 	qc->err_mask |= AC_ERR_OTHER;
837 	sata_port->ioasa.status |= ATA_BUSY;
838 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
839 	ata_qc_complete(qc);
840 }
841 
842 /**
843  * ipr_scsi_eh_done - mid-layer done function for aborted ops
844  * @ipr_cmd:	ipr command struct
845  *
846  * This function is invoked by the interrupt handler for
847  * ops generated by the SCSI mid-layer which are being aborted.
848  *
849  * Return value:
850  * 	none
851  **/
852 static void ipr_scsi_eh_done(struct ipr_cmnd *ipr_cmd)
853 {
854 	struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
855 
856 	scsi_cmd->result |= (DID_ERROR << 16);
857 
858 	scsi_dma_unmap(ipr_cmd->scsi_cmd);
859 	scsi_cmd->scsi_done(scsi_cmd);
860 	if (ipr_cmd->eh_comp)
861 		complete(ipr_cmd->eh_comp);
862 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
863 }
864 
865 /**
866  * ipr_fail_all_ops - Fails all outstanding ops.
867  * @ioa_cfg:	ioa config struct
868  *
869  * This function fails all outstanding ops.
870  *
871  * Return value:
872  * 	none
873  **/
874 static void ipr_fail_all_ops(struct ipr_ioa_cfg *ioa_cfg)
875 {
876 	struct ipr_cmnd *ipr_cmd, *temp;
877 	struct ipr_hrr_queue *hrrq;
878 
879 	ENTER;
880 	for_each_hrrq(hrrq, ioa_cfg) {
881 		spin_lock(&hrrq->_lock);
882 		list_for_each_entry_safe(ipr_cmd,
883 					temp, &hrrq->hrrq_pending_q, queue) {
884 			list_del(&ipr_cmd->queue);
885 
886 			ipr_cmd->s.ioasa.hdr.ioasc =
887 				cpu_to_be32(IPR_IOASC_IOA_WAS_RESET);
888 			ipr_cmd->s.ioasa.hdr.ilid =
889 				cpu_to_be32(IPR_DRIVER_ILID);
890 
891 			if (ipr_cmd->scsi_cmd)
892 				ipr_cmd->done = ipr_scsi_eh_done;
893 			else if (ipr_cmd->qc)
894 				ipr_cmd->done = ipr_sata_eh_done;
895 
896 			ipr_trc_hook(ipr_cmd, IPR_TRACE_FINISH,
897 				     IPR_IOASC_IOA_WAS_RESET);
898 			del_timer(&ipr_cmd->timer);
899 			ipr_cmd->done(ipr_cmd);
900 		}
901 		spin_unlock(&hrrq->_lock);
902 	}
903 	LEAVE;
904 }
905 
906 /**
907  * ipr_send_command -  Send driver initiated requests.
908  * @ipr_cmd:		ipr command struct
909  *
910  * This function sends a command to the adapter using the correct write call.
911  * In the case of sis64, calculate the ioarcb size required. Then or in the
912  * appropriate bits.
913  *
914  * Return value:
915  * 	none
916  **/
917 static void ipr_send_command(struct ipr_cmnd *ipr_cmd)
918 {
919 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
920 	dma_addr_t send_dma_addr = ipr_cmd->dma_addr;
921 
922 	if (ioa_cfg->sis64) {
923 		/* The default size is 256 bytes */
924 		send_dma_addr |= 0x1;
925 
926 		/* If the number of ioadls * size of ioadl > 128 bytes,
927 		   then use a 512 byte ioarcb */
928 		if (ipr_cmd->dma_use_sg * sizeof(struct ipr_ioadl64_desc) > 128 )
929 			send_dma_addr |= 0x4;
930 		writeq(send_dma_addr, ioa_cfg->regs.ioarrin_reg);
931 	} else
932 		writel(send_dma_addr, ioa_cfg->regs.ioarrin_reg);
933 }
934 
935 /**
936  * ipr_do_req -  Send driver initiated requests.
937  * @ipr_cmd:		ipr command struct
938  * @done:			done function
939  * @timeout_func:	timeout function
940  * @timeout:		timeout value
941  *
942  * This function sends the specified command to the adapter with the
943  * timeout given. The done function is invoked on command completion.
944  *
945  * Return value:
946  * 	none
947  **/
948 static void ipr_do_req(struct ipr_cmnd *ipr_cmd,
949 		       void (*done) (struct ipr_cmnd *),
950 		       void (*timeout_func) (struct ipr_cmnd *), u32 timeout)
951 {
952 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
953 
954 	ipr_cmd->done = done;
955 
956 	ipr_cmd->timer.data = (unsigned long) ipr_cmd;
957 	ipr_cmd->timer.expires = jiffies + timeout;
958 	ipr_cmd->timer.function = (void (*)(unsigned long))timeout_func;
959 
960 	add_timer(&ipr_cmd->timer);
961 
962 	ipr_trc_hook(ipr_cmd, IPR_TRACE_START, 0);
963 
964 	ipr_send_command(ipr_cmd);
965 }
966 
967 /**
968  * ipr_internal_cmd_done - Op done function for an internally generated op.
969  * @ipr_cmd:	ipr command struct
970  *
971  * This function is the op done function for an internally generated,
972  * blocking op. It simply wakes the sleeping thread.
973  *
974  * Return value:
975  * 	none
976  **/
977 static void ipr_internal_cmd_done(struct ipr_cmnd *ipr_cmd)
978 {
979 	if (ipr_cmd->sibling)
980 		ipr_cmd->sibling = NULL;
981 	else
982 		complete(&ipr_cmd->completion);
983 }
984 
985 /**
986  * ipr_init_ioadl - initialize the ioadl for the correct SIS type
987  * @ipr_cmd:	ipr command struct
988  * @dma_addr:	dma address
989  * @len:	transfer length
990  * @flags:	ioadl flag value
991  *
992  * This function initializes an ioadl in the case where there is only a single
993  * descriptor.
994  *
995  * Return value:
996  * 	nothing
997  **/
998 static void ipr_init_ioadl(struct ipr_cmnd *ipr_cmd, dma_addr_t dma_addr,
999 			   u32 len, int flags)
1000 {
1001 	struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
1002 	struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ioadl64;
1003 
1004 	ipr_cmd->dma_use_sg = 1;
1005 
1006 	if (ipr_cmd->ioa_cfg->sis64) {
1007 		ioadl64->flags = cpu_to_be32(flags);
1008 		ioadl64->data_len = cpu_to_be32(len);
1009 		ioadl64->address = cpu_to_be64(dma_addr);
1010 
1011 		ipr_cmd->ioarcb.ioadl_len =
1012 		       	cpu_to_be32(sizeof(struct ipr_ioadl64_desc));
1013 		ipr_cmd->ioarcb.data_transfer_length = cpu_to_be32(len);
1014 	} else {
1015 		ioadl->flags_and_data_len = cpu_to_be32(flags | len);
1016 		ioadl->address = cpu_to_be32(dma_addr);
1017 
1018 		if (flags == IPR_IOADL_FLAGS_READ_LAST) {
1019 			ipr_cmd->ioarcb.read_ioadl_len =
1020 				cpu_to_be32(sizeof(struct ipr_ioadl_desc));
1021 			ipr_cmd->ioarcb.read_data_transfer_length = cpu_to_be32(len);
1022 		} else {
1023 			ipr_cmd->ioarcb.ioadl_len =
1024 			       	cpu_to_be32(sizeof(struct ipr_ioadl_desc));
1025 			ipr_cmd->ioarcb.data_transfer_length = cpu_to_be32(len);
1026 		}
1027 	}
1028 }
1029 
1030 /**
1031  * ipr_send_blocking_cmd - Send command and sleep on its completion.
1032  * @ipr_cmd:	ipr command struct
1033  * @timeout_func:	function to invoke if command times out
1034  * @timeout:	timeout
1035  *
1036  * Return value:
1037  * 	none
1038  **/
1039 static void ipr_send_blocking_cmd(struct ipr_cmnd *ipr_cmd,
1040 				  void (*timeout_func) (struct ipr_cmnd *ipr_cmd),
1041 				  u32 timeout)
1042 {
1043 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
1044 
1045 	init_completion(&ipr_cmd->completion);
1046 	ipr_do_req(ipr_cmd, ipr_internal_cmd_done, timeout_func, timeout);
1047 
1048 	spin_unlock_irq(ioa_cfg->host->host_lock);
1049 	wait_for_completion(&ipr_cmd->completion);
1050 	spin_lock_irq(ioa_cfg->host->host_lock);
1051 }
1052 
1053 static int ipr_get_hrrq_index(struct ipr_ioa_cfg *ioa_cfg)
1054 {
1055 	unsigned int hrrq;
1056 
1057 	if (ioa_cfg->hrrq_num == 1)
1058 		hrrq = 0;
1059 	else {
1060 		hrrq = atomic_add_return(1, &ioa_cfg->hrrq_index);
1061 		hrrq = (hrrq % (ioa_cfg->hrrq_num - 1)) + 1;
1062 	}
1063 	return hrrq;
1064 }
1065 
1066 /**
1067  * ipr_send_hcam - Send an HCAM to the adapter.
1068  * @ioa_cfg:	ioa config struct
1069  * @type:		HCAM type
1070  * @hostrcb:	hostrcb struct
1071  *
1072  * This function will send a Host Controlled Async command to the adapter.
1073  * If HCAMs are currently not allowed to be issued to the adapter, it will
1074  * place the hostrcb on the free queue.
1075  *
1076  * Return value:
1077  * 	none
1078  **/
1079 static void ipr_send_hcam(struct ipr_ioa_cfg *ioa_cfg, u8 type,
1080 			  struct ipr_hostrcb *hostrcb)
1081 {
1082 	struct ipr_cmnd *ipr_cmd;
1083 	struct ipr_ioarcb *ioarcb;
1084 
1085 	if (ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds) {
1086 		ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
1087 		list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
1088 		list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_pending_q);
1089 
1090 		ipr_cmd->u.hostrcb = hostrcb;
1091 		ioarcb = &ipr_cmd->ioarcb;
1092 
1093 		ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
1094 		ioarcb->cmd_pkt.request_type = IPR_RQTYPE_HCAM;
1095 		ioarcb->cmd_pkt.cdb[0] = IPR_HOST_CONTROLLED_ASYNC;
1096 		ioarcb->cmd_pkt.cdb[1] = type;
1097 		ioarcb->cmd_pkt.cdb[7] = (sizeof(hostrcb->hcam) >> 8) & 0xff;
1098 		ioarcb->cmd_pkt.cdb[8] = sizeof(hostrcb->hcam) & 0xff;
1099 
1100 		ipr_init_ioadl(ipr_cmd, hostrcb->hostrcb_dma,
1101 			       sizeof(hostrcb->hcam), IPR_IOADL_FLAGS_READ_LAST);
1102 
1103 		if (type == IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE)
1104 			ipr_cmd->done = ipr_process_ccn;
1105 		else
1106 			ipr_cmd->done = ipr_process_error;
1107 
1108 		ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_IOA_RES_ADDR);
1109 
1110 		ipr_send_command(ipr_cmd);
1111 	} else {
1112 		list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_free_q);
1113 	}
1114 }
1115 
1116 /**
1117  * ipr_update_ata_class - Update the ata class in the resource entry
1118  * @res:	resource entry struct
1119  * @proto:	cfgte device bus protocol value
1120  *
1121  * Return value:
1122  * 	none
1123  **/
1124 static void ipr_update_ata_class(struct ipr_resource_entry *res, unsigned int proto)
1125 {
1126 	switch (proto) {
1127 	case IPR_PROTO_SATA:
1128 	case IPR_PROTO_SAS_STP:
1129 		res->ata_class = ATA_DEV_ATA;
1130 		break;
1131 	case IPR_PROTO_SATA_ATAPI:
1132 	case IPR_PROTO_SAS_STP_ATAPI:
1133 		res->ata_class = ATA_DEV_ATAPI;
1134 		break;
1135 	default:
1136 		res->ata_class = ATA_DEV_UNKNOWN;
1137 		break;
1138 	};
1139 }
1140 
1141 /**
1142  * ipr_init_res_entry - Initialize a resource entry struct.
1143  * @res:	resource entry struct
1144  * @cfgtew:	config table entry wrapper struct
1145  *
1146  * Return value:
1147  * 	none
1148  **/
1149 static void ipr_init_res_entry(struct ipr_resource_entry *res,
1150 			       struct ipr_config_table_entry_wrapper *cfgtew)
1151 {
1152 	int found = 0;
1153 	unsigned int proto;
1154 	struct ipr_ioa_cfg *ioa_cfg = res->ioa_cfg;
1155 	struct ipr_resource_entry *gscsi_res = NULL;
1156 
1157 	res->needs_sync_complete = 0;
1158 	res->in_erp = 0;
1159 	res->add_to_ml = 0;
1160 	res->del_from_ml = 0;
1161 	res->resetting_device = 0;
1162 	res->reset_occurred = 0;
1163 	res->sdev = NULL;
1164 	res->sata_port = NULL;
1165 
1166 	if (ioa_cfg->sis64) {
1167 		proto = cfgtew->u.cfgte64->proto;
1168 		res->flags = be16_to_cpu(cfgtew->u.cfgte64->flags);
1169 		res->res_flags = be16_to_cpu(cfgtew->u.cfgte64->res_flags);
1170 		res->qmodel = IPR_QUEUEING_MODEL64(res);
1171 		res->type = cfgtew->u.cfgte64->res_type;
1172 
1173 		memcpy(res->res_path, &cfgtew->u.cfgte64->res_path,
1174 			sizeof(res->res_path));
1175 
1176 		res->bus = 0;
1177 		memcpy(&res->dev_lun.scsi_lun, &cfgtew->u.cfgte64->lun,
1178 			sizeof(res->dev_lun.scsi_lun));
1179 		res->lun = scsilun_to_int(&res->dev_lun);
1180 
1181 		if (res->type == IPR_RES_TYPE_GENERIC_SCSI) {
1182 			list_for_each_entry(gscsi_res, &ioa_cfg->used_res_q, queue) {
1183 				if (gscsi_res->dev_id == cfgtew->u.cfgte64->dev_id) {
1184 					found = 1;
1185 					res->target = gscsi_res->target;
1186 					break;
1187 				}
1188 			}
1189 			if (!found) {
1190 				res->target = find_first_zero_bit(ioa_cfg->target_ids,
1191 								  ioa_cfg->max_devs_supported);
1192 				set_bit(res->target, ioa_cfg->target_ids);
1193 			}
1194 		} else if (res->type == IPR_RES_TYPE_IOAFP) {
1195 			res->bus = IPR_IOAFP_VIRTUAL_BUS;
1196 			res->target = 0;
1197 		} else if (res->type == IPR_RES_TYPE_ARRAY) {
1198 			res->bus = IPR_ARRAY_VIRTUAL_BUS;
1199 			res->target = find_first_zero_bit(ioa_cfg->array_ids,
1200 							  ioa_cfg->max_devs_supported);
1201 			set_bit(res->target, ioa_cfg->array_ids);
1202 		} else if (res->type == IPR_RES_TYPE_VOLUME_SET) {
1203 			res->bus = IPR_VSET_VIRTUAL_BUS;
1204 			res->target = find_first_zero_bit(ioa_cfg->vset_ids,
1205 							  ioa_cfg->max_devs_supported);
1206 			set_bit(res->target, ioa_cfg->vset_ids);
1207 		} else {
1208 			res->target = find_first_zero_bit(ioa_cfg->target_ids,
1209 							  ioa_cfg->max_devs_supported);
1210 			set_bit(res->target, ioa_cfg->target_ids);
1211 		}
1212 	} else {
1213 		proto = cfgtew->u.cfgte->proto;
1214 		res->qmodel = IPR_QUEUEING_MODEL(res);
1215 		res->flags = cfgtew->u.cfgte->flags;
1216 		if (res->flags & IPR_IS_IOA_RESOURCE)
1217 			res->type = IPR_RES_TYPE_IOAFP;
1218 		else
1219 			res->type = cfgtew->u.cfgte->rsvd_subtype & 0x0f;
1220 
1221 		res->bus = cfgtew->u.cfgte->res_addr.bus;
1222 		res->target = cfgtew->u.cfgte->res_addr.target;
1223 		res->lun = cfgtew->u.cfgte->res_addr.lun;
1224 		res->lun_wwn = get_unaligned_be64(cfgtew->u.cfgte->lun_wwn);
1225 	}
1226 
1227 	ipr_update_ata_class(res, proto);
1228 }
1229 
1230 /**
1231  * ipr_is_same_device - Determine if two devices are the same.
1232  * @res:	resource entry struct
1233  * @cfgtew:	config table entry wrapper struct
1234  *
1235  * Return value:
1236  * 	1 if the devices are the same / 0 otherwise
1237  **/
1238 static int ipr_is_same_device(struct ipr_resource_entry *res,
1239 			      struct ipr_config_table_entry_wrapper *cfgtew)
1240 {
1241 	if (res->ioa_cfg->sis64) {
1242 		if (!memcmp(&res->dev_id, &cfgtew->u.cfgte64->dev_id,
1243 					sizeof(cfgtew->u.cfgte64->dev_id)) &&
1244 			!memcmp(&res->dev_lun.scsi_lun, &cfgtew->u.cfgte64->lun,
1245 					sizeof(cfgtew->u.cfgte64->lun))) {
1246 			return 1;
1247 		}
1248 	} else {
1249 		if (res->bus == cfgtew->u.cfgte->res_addr.bus &&
1250 		    res->target == cfgtew->u.cfgte->res_addr.target &&
1251 		    res->lun == cfgtew->u.cfgte->res_addr.lun)
1252 			return 1;
1253 	}
1254 
1255 	return 0;
1256 }
1257 
1258 /**
1259  * __ipr_format_res_path - Format the resource path for printing.
1260  * @res_path:	resource path
1261  * @buf:	buffer
1262  * @len:	length of buffer provided
1263  *
1264  * Return value:
1265  * 	pointer to buffer
1266  **/
1267 static char *__ipr_format_res_path(u8 *res_path, char *buffer, int len)
1268 {
1269 	int i;
1270 	char *p = buffer;
1271 
1272 	*p = '\0';
1273 	p += snprintf(p, buffer + len - p, "%02X", res_path[0]);
1274 	for (i = 1; res_path[i] != 0xff && ((i * 3) < len); i++)
1275 		p += snprintf(p, buffer + len - p, "-%02X", res_path[i]);
1276 
1277 	return buffer;
1278 }
1279 
1280 /**
1281  * ipr_format_res_path - Format the resource path for printing.
1282  * @ioa_cfg:	ioa config struct
1283  * @res_path:	resource path
1284  * @buf:	buffer
1285  * @len:	length of buffer provided
1286  *
1287  * Return value:
1288  *	pointer to buffer
1289  **/
1290 static char *ipr_format_res_path(struct ipr_ioa_cfg *ioa_cfg,
1291 				 u8 *res_path, char *buffer, int len)
1292 {
1293 	char *p = buffer;
1294 
1295 	*p = '\0';
1296 	p += snprintf(p, buffer + len - p, "%d/", ioa_cfg->host->host_no);
1297 	__ipr_format_res_path(res_path, p, len - (buffer - p));
1298 	return buffer;
1299 }
1300 
1301 /**
1302  * ipr_update_res_entry - Update the resource entry.
1303  * @res:	resource entry struct
1304  * @cfgtew:	config table entry wrapper struct
1305  *
1306  * Return value:
1307  *      none
1308  **/
1309 static void ipr_update_res_entry(struct ipr_resource_entry *res,
1310 				 struct ipr_config_table_entry_wrapper *cfgtew)
1311 {
1312 	char buffer[IPR_MAX_RES_PATH_LENGTH];
1313 	unsigned int proto;
1314 	int new_path = 0;
1315 
1316 	if (res->ioa_cfg->sis64) {
1317 		res->flags = be16_to_cpu(cfgtew->u.cfgte64->flags);
1318 		res->res_flags = be16_to_cpu(cfgtew->u.cfgte64->res_flags);
1319 		res->type = cfgtew->u.cfgte64->res_type;
1320 
1321 		memcpy(&res->std_inq_data, &cfgtew->u.cfgte64->std_inq_data,
1322 			sizeof(struct ipr_std_inq_data));
1323 
1324 		res->qmodel = IPR_QUEUEING_MODEL64(res);
1325 		proto = cfgtew->u.cfgte64->proto;
1326 		res->res_handle = cfgtew->u.cfgte64->res_handle;
1327 		res->dev_id = cfgtew->u.cfgte64->dev_id;
1328 
1329 		memcpy(&res->dev_lun.scsi_lun, &cfgtew->u.cfgte64->lun,
1330 			sizeof(res->dev_lun.scsi_lun));
1331 
1332 		if (memcmp(res->res_path, &cfgtew->u.cfgte64->res_path,
1333 					sizeof(res->res_path))) {
1334 			memcpy(res->res_path, &cfgtew->u.cfgte64->res_path,
1335 				sizeof(res->res_path));
1336 			new_path = 1;
1337 		}
1338 
1339 		if (res->sdev && new_path)
1340 			sdev_printk(KERN_INFO, res->sdev, "Resource path: %s\n",
1341 				    ipr_format_res_path(res->ioa_cfg,
1342 					res->res_path, buffer, sizeof(buffer)));
1343 	} else {
1344 		res->flags = cfgtew->u.cfgte->flags;
1345 		if (res->flags & IPR_IS_IOA_RESOURCE)
1346 			res->type = IPR_RES_TYPE_IOAFP;
1347 		else
1348 			res->type = cfgtew->u.cfgte->rsvd_subtype & 0x0f;
1349 
1350 		memcpy(&res->std_inq_data, &cfgtew->u.cfgte->std_inq_data,
1351 			sizeof(struct ipr_std_inq_data));
1352 
1353 		res->qmodel = IPR_QUEUEING_MODEL(res);
1354 		proto = cfgtew->u.cfgte->proto;
1355 		res->res_handle = cfgtew->u.cfgte->res_handle;
1356 	}
1357 
1358 	ipr_update_ata_class(res, proto);
1359 }
1360 
1361 /**
1362  * ipr_clear_res_target - Clear the bit in the bit map representing the target
1363  * 			  for the resource.
1364  * @res:	resource entry struct
1365  * @cfgtew:	config table entry wrapper struct
1366  *
1367  * Return value:
1368  *      none
1369  **/
1370 static void ipr_clear_res_target(struct ipr_resource_entry *res)
1371 {
1372 	struct ipr_resource_entry *gscsi_res = NULL;
1373 	struct ipr_ioa_cfg *ioa_cfg = res->ioa_cfg;
1374 
1375 	if (!ioa_cfg->sis64)
1376 		return;
1377 
1378 	if (res->bus == IPR_ARRAY_VIRTUAL_BUS)
1379 		clear_bit(res->target, ioa_cfg->array_ids);
1380 	else if (res->bus == IPR_VSET_VIRTUAL_BUS)
1381 		clear_bit(res->target, ioa_cfg->vset_ids);
1382 	else if (res->bus == 0 && res->type == IPR_RES_TYPE_GENERIC_SCSI) {
1383 		list_for_each_entry(gscsi_res, &ioa_cfg->used_res_q, queue)
1384 			if (gscsi_res->dev_id == res->dev_id && gscsi_res != res)
1385 				return;
1386 		clear_bit(res->target, ioa_cfg->target_ids);
1387 
1388 	} else if (res->bus == 0)
1389 		clear_bit(res->target, ioa_cfg->target_ids);
1390 }
1391 
1392 /**
1393  * ipr_handle_config_change - Handle a config change from the adapter
1394  * @ioa_cfg:	ioa config struct
1395  * @hostrcb:	hostrcb
1396  *
1397  * Return value:
1398  * 	none
1399  **/
1400 static void ipr_handle_config_change(struct ipr_ioa_cfg *ioa_cfg,
1401 				     struct ipr_hostrcb *hostrcb)
1402 {
1403 	struct ipr_resource_entry *res = NULL;
1404 	struct ipr_config_table_entry_wrapper cfgtew;
1405 	__be32 cc_res_handle;
1406 
1407 	u32 is_ndn = 1;
1408 
1409 	if (ioa_cfg->sis64) {
1410 		cfgtew.u.cfgte64 = &hostrcb->hcam.u.ccn.u.cfgte64;
1411 		cc_res_handle = cfgtew.u.cfgte64->res_handle;
1412 	} else {
1413 		cfgtew.u.cfgte = &hostrcb->hcam.u.ccn.u.cfgte;
1414 		cc_res_handle = cfgtew.u.cfgte->res_handle;
1415 	}
1416 
1417 	list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
1418 		if (res->res_handle == cc_res_handle) {
1419 			is_ndn = 0;
1420 			break;
1421 		}
1422 	}
1423 
1424 	if (is_ndn) {
1425 		if (list_empty(&ioa_cfg->free_res_q)) {
1426 			ipr_send_hcam(ioa_cfg,
1427 				      IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE,
1428 				      hostrcb);
1429 			return;
1430 		}
1431 
1432 		res = list_entry(ioa_cfg->free_res_q.next,
1433 				 struct ipr_resource_entry, queue);
1434 
1435 		list_del(&res->queue);
1436 		ipr_init_res_entry(res, &cfgtew);
1437 		list_add_tail(&res->queue, &ioa_cfg->used_res_q);
1438 	}
1439 
1440 	ipr_update_res_entry(res, &cfgtew);
1441 
1442 	if (hostrcb->hcam.notify_type == IPR_HOST_RCB_NOTIF_TYPE_REM_ENTRY) {
1443 		if (res->sdev) {
1444 			res->del_from_ml = 1;
1445 			res->res_handle = IPR_INVALID_RES_HANDLE;
1446 			schedule_work(&ioa_cfg->work_q);
1447 		} else {
1448 			ipr_clear_res_target(res);
1449 			list_move_tail(&res->queue, &ioa_cfg->free_res_q);
1450 		}
1451 	} else if (!res->sdev || res->del_from_ml) {
1452 		res->add_to_ml = 1;
1453 		schedule_work(&ioa_cfg->work_q);
1454 	}
1455 
1456 	ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
1457 }
1458 
1459 /**
1460  * ipr_process_ccn - Op done function for a CCN.
1461  * @ipr_cmd:	ipr command struct
1462  *
1463  * This function is the op done function for a configuration
1464  * change notification host controlled async from the adapter.
1465  *
1466  * Return value:
1467  * 	none
1468  **/
1469 static void ipr_process_ccn(struct ipr_cmnd *ipr_cmd)
1470 {
1471 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
1472 	struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
1473 	u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
1474 
1475 	list_del(&hostrcb->queue);
1476 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
1477 
1478 	if (ioasc) {
1479 		if (ioasc != IPR_IOASC_IOA_WAS_RESET &&
1480 		    ioasc != IPR_IOASC_ABORTED_CMD_TERM_BY_HOST)
1481 			dev_err(&ioa_cfg->pdev->dev,
1482 				"Host RCB failed with IOASC: 0x%08X\n", ioasc);
1483 
1484 		ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
1485 	} else {
1486 		ipr_handle_config_change(ioa_cfg, hostrcb);
1487 	}
1488 }
1489 
1490 /**
1491  * strip_and_pad_whitespace - Strip and pad trailing whitespace.
1492  * @i:		index into buffer
1493  * @buf:		string to modify
1494  *
1495  * This function will strip all trailing whitespace, pad the end
1496  * of the string with a single space, and NULL terminate the string.
1497  *
1498  * Return value:
1499  * 	new length of string
1500  **/
1501 static int strip_and_pad_whitespace(int i, char *buf)
1502 {
1503 	while (i && buf[i] == ' ')
1504 		i--;
1505 	buf[i+1] = ' ';
1506 	buf[i+2] = '\0';
1507 	return i + 2;
1508 }
1509 
1510 /**
1511  * ipr_log_vpd_compact - Log the passed extended VPD compactly.
1512  * @prefix:		string to print at start of printk
1513  * @hostrcb:	hostrcb pointer
1514  * @vpd:		vendor/product id/sn struct
1515  *
1516  * Return value:
1517  * 	none
1518  **/
1519 static void ipr_log_vpd_compact(char *prefix, struct ipr_hostrcb *hostrcb,
1520 				struct ipr_vpd *vpd)
1521 {
1522 	char buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN + IPR_SERIAL_NUM_LEN + 3];
1523 	int i = 0;
1524 
1525 	memcpy(buffer, vpd->vpids.vendor_id, IPR_VENDOR_ID_LEN);
1526 	i = strip_and_pad_whitespace(IPR_VENDOR_ID_LEN - 1, buffer);
1527 
1528 	memcpy(&buffer[i], vpd->vpids.product_id, IPR_PROD_ID_LEN);
1529 	i = strip_and_pad_whitespace(i + IPR_PROD_ID_LEN - 1, buffer);
1530 
1531 	memcpy(&buffer[i], vpd->sn, IPR_SERIAL_NUM_LEN);
1532 	buffer[IPR_SERIAL_NUM_LEN + i] = '\0';
1533 
1534 	ipr_hcam_err(hostrcb, "%s VPID/SN: %s\n", prefix, buffer);
1535 }
1536 
1537 /**
1538  * ipr_log_vpd - Log the passed VPD to the error log.
1539  * @vpd:		vendor/product id/sn struct
1540  *
1541  * Return value:
1542  * 	none
1543  **/
1544 static void ipr_log_vpd(struct ipr_vpd *vpd)
1545 {
1546 	char buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN
1547 		    + IPR_SERIAL_NUM_LEN];
1548 
1549 	memcpy(buffer, vpd->vpids.vendor_id, IPR_VENDOR_ID_LEN);
1550 	memcpy(buffer + IPR_VENDOR_ID_LEN, vpd->vpids.product_id,
1551 	       IPR_PROD_ID_LEN);
1552 	buffer[IPR_VENDOR_ID_LEN + IPR_PROD_ID_LEN] = '\0';
1553 	ipr_err("Vendor/Product ID: %s\n", buffer);
1554 
1555 	memcpy(buffer, vpd->sn, IPR_SERIAL_NUM_LEN);
1556 	buffer[IPR_SERIAL_NUM_LEN] = '\0';
1557 	ipr_err("    Serial Number: %s\n", buffer);
1558 }
1559 
1560 /**
1561  * ipr_log_ext_vpd_compact - Log the passed extended VPD compactly.
1562  * @prefix:		string to print at start of printk
1563  * @hostrcb:	hostrcb pointer
1564  * @vpd:		vendor/product id/sn/wwn struct
1565  *
1566  * Return value:
1567  * 	none
1568  **/
1569 static void ipr_log_ext_vpd_compact(char *prefix, struct ipr_hostrcb *hostrcb,
1570 				    struct ipr_ext_vpd *vpd)
1571 {
1572 	ipr_log_vpd_compact(prefix, hostrcb, &vpd->vpd);
1573 	ipr_hcam_err(hostrcb, "%s WWN: %08X%08X\n", prefix,
1574 		     be32_to_cpu(vpd->wwid[0]), be32_to_cpu(vpd->wwid[1]));
1575 }
1576 
1577 /**
1578  * ipr_log_ext_vpd - Log the passed extended VPD to the error log.
1579  * @vpd:		vendor/product id/sn/wwn struct
1580  *
1581  * Return value:
1582  * 	none
1583  **/
1584 static void ipr_log_ext_vpd(struct ipr_ext_vpd *vpd)
1585 {
1586 	ipr_log_vpd(&vpd->vpd);
1587 	ipr_err("    WWN: %08X%08X\n", be32_to_cpu(vpd->wwid[0]),
1588 		be32_to_cpu(vpd->wwid[1]));
1589 }
1590 
1591 /**
1592  * ipr_log_enhanced_cache_error - Log a cache error.
1593  * @ioa_cfg:	ioa config struct
1594  * @hostrcb:	hostrcb struct
1595  *
1596  * Return value:
1597  * 	none
1598  **/
1599 static void ipr_log_enhanced_cache_error(struct ipr_ioa_cfg *ioa_cfg,
1600 					 struct ipr_hostrcb *hostrcb)
1601 {
1602 	struct ipr_hostrcb_type_12_error *error;
1603 
1604 	if (ioa_cfg->sis64)
1605 		error = &hostrcb->hcam.u.error64.u.type_12_error;
1606 	else
1607 		error = &hostrcb->hcam.u.error.u.type_12_error;
1608 
1609 	ipr_err("-----Current Configuration-----\n");
1610 	ipr_err("Cache Directory Card Information:\n");
1611 	ipr_log_ext_vpd(&error->ioa_vpd);
1612 	ipr_err("Adapter Card Information:\n");
1613 	ipr_log_ext_vpd(&error->cfc_vpd);
1614 
1615 	ipr_err("-----Expected Configuration-----\n");
1616 	ipr_err("Cache Directory Card Information:\n");
1617 	ipr_log_ext_vpd(&error->ioa_last_attached_to_cfc_vpd);
1618 	ipr_err("Adapter Card Information:\n");
1619 	ipr_log_ext_vpd(&error->cfc_last_attached_to_ioa_vpd);
1620 
1621 	ipr_err("Additional IOA Data: %08X %08X %08X\n",
1622 		     be32_to_cpu(error->ioa_data[0]),
1623 		     be32_to_cpu(error->ioa_data[1]),
1624 		     be32_to_cpu(error->ioa_data[2]));
1625 }
1626 
1627 /**
1628  * ipr_log_cache_error - Log a cache error.
1629  * @ioa_cfg:	ioa config struct
1630  * @hostrcb:	hostrcb struct
1631  *
1632  * Return value:
1633  * 	none
1634  **/
1635 static void ipr_log_cache_error(struct ipr_ioa_cfg *ioa_cfg,
1636 				struct ipr_hostrcb *hostrcb)
1637 {
1638 	struct ipr_hostrcb_type_02_error *error =
1639 		&hostrcb->hcam.u.error.u.type_02_error;
1640 
1641 	ipr_err("-----Current Configuration-----\n");
1642 	ipr_err("Cache Directory Card Information:\n");
1643 	ipr_log_vpd(&error->ioa_vpd);
1644 	ipr_err("Adapter Card Information:\n");
1645 	ipr_log_vpd(&error->cfc_vpd);
1646 
1647 	ipr_err("-----Expected Configuration-----\n");
1648 	ipr_err("Cache Directory Card Information:\n");
1649 	ipr_log_vpd(&error->ioa_last_attached_to_cfc_vpd);
1650 	ipr_err("Adapter Card Information:\n");
1651 	ipr_log_vpd(&error->cfc_last_attached_to_ioa_vpd);
1652 
1653 	ipr_err("Additional IOA Data: %08X %08X %08X\n",
1654 		     be32_to_cpu(error->ioa_data[0]),
1655 		     be32_to_cpu(error->ioa_data[1]),
1656 		     be32_to_cpu(error->ioa_data[2]));
1657 }
1658 
1659 /**
1660  * ipr_log_enhanced_config_error - Log a configuration error.
1661  * @ioa_cfg:	ioa config struct
1662  * @hostrcb:	hostrcb struct
1663  *
1664  * Return value:
1665  * 	none
1666  **/
1667 static void ipr_log_enhanced_config_error(struct ipr_ioa_cfg *ioa_cfg,
1668 					  struct ipr_hostrcb *hostrcb)
1669 {
1670 	int errors_logged, i;
1671 	struct ipr_hostrcb_device_data_entry_enhanced *dev_entry;
1672 	struct ipr_hostrcb_type_13_error *error;
1673 
1674 	error = &hostrcb->hcam.u.error.u.type_13_error;
1675 	errors_logged = be32_to_cpu(error->errors_logged);
1676 
1677 	ipr_err("Device Errors Detected/Logged: %d/%d\n",
1678 		be32_to_cpu(error->errors_detected), errors_logged);
1679 
1680 	dev_entry = error->dev;
1681 
1682 	for (i = 0; i < errors_logged; i++, dev_entry++) {
1683 		ipr_err_separator;
1684 
1685 		ipr_phys_res_err(ioa_cfg, dev_entry->dev_res_addr, "Device %d", i + 1);
1686 		ipr_log_ext_vpd(&dev_entry->vpd);
1687 
1688 		ipr_err("-----New Device Information-----\n");
1689 		ipr_log_ext_vpd(&dev_entry->new_vpd);
1690 
1691 		ipr_err("Cache Directory Card Information:\n");
1692 		ipr_log_ext_vpd(&dev_entry->ioa_last_with_dev_vpd);
1693 
1694 		ipr_err("Adapter Card Information:\n");
1695 		ipr_log_ext_vpd(&dev_entry->cfc_last_with_dev_vpd);
1696 	}
1697 }
1698 
1699 /**
1700  * ipr_log_sis64_config_error - Log a device error.
1701  * @ioa_cfg:	ioa config struct
1702  * @hostrcb:	hostrcb struct
1703  *
1704  * Return value:
1705  * 	none
1706  **/
1707 static void ipr_log_sis64_config_error(struct ipr_ioa_cfg *ioa_cfg,
1708 				       struct ipr_hostrcb *hostrcb)
1709 {
1710 	int errors_logged, i;
1711 	struct ipr_hostrcb64_device_data_entry_enhanced *dev_entry;
1712 	struct ipr_hostrcb_type_23_error *error;
1713 	char buffer[IPR_MAX_RES_PATH_LENGTH];
1714 
1715 	error = &hostrcb->hcam.u.error64.u.type_23_error;
1716 	errors_logged = be32_to_cpu(error->errors_logged);
1717 
1718 	ipr_err("Device Errors Detected/Logged: %d/%d\n",
1719 		be32_to_cpu(error->errors_detected), errors_logged);
1720 
1721 	dev_entry = error->dev;
1722 
1723 	for (i = 0; i < errors_logged; i++, dev_entry++) {
1724 		ipr_err_separator;
1725 
1726 		ipr_err("Device %d : %s", i + 1,
1727 			__ipr_format_res_path(dev_entry->res_path,
1728 					      buffer, sizeof(buffer)));
1729 		ipr_log_ext_vpd(&dev_entry->vpd);
1730 
1731 		ipr_err("-----New Device Information-----\n");
1732 		ipr_log_ext_vpd(&dev_entry->new_vpd);
1733 
1734 		ipr_err("Cache Directory Card Information:\n");
1735 		ipr_log_ext_vpd(&dev_entry->ioa_last_with_dev_vpd);
1736 
1737 		ipr_err("Adapter Card Information:\n");
1738 		ipr_log_ext_vpd(&dev_entry->cfc_last_with_dev_vpd);
1739 	}
1740 }
1741 
1742 /**
1743  * ipr_log_config_error - Log a configuration error.
1744  * @ioa_cfg:	ioa config struct
1745  * @hostrcb:	hostrcb struct
1746  *
1747  * Return value:
1748  * 	none
1749  **/
1750 static void ipr_log_config_error(struct ipr_ioa_cfg *ioa_cfg,
1751 				 struct ipr_hostrcb *hostrcb)
1752 {
1753 	int errors_logged, i;
1754 	struct ipr_hostrcb_device_data_entry *dev_entry;
1755 	struct ipr_hostrcb_type_03_error *error;
1756 
1757 	error = &hostrcb->hcam.u.error.u.type_03_error;
1758 	errors_logged = be32_to_cpu(error->errors_logged);
1759 
1760 	ipr_err("Device Errors Detected/Logged: %d/%d\n",
1761 		be32_to_cpu(error->errors_detected), errors_logged);
1762 
1763 	dev_entry = error->dev;
1764 
1765 	for (i = 0; i < errors_logged; i++, dev_entry++) {
1766 		ipr_err_separator;
1767 
1768 		ipr_phys_res_err(ioa_cfg, dev_entry->dev_res_addr, "Device %d", i + 1);
1769 		ipr_log_vpd(&dev_entry->vpd);
1770 
1771 		ipr_err("-----New Device Information-----\n");
1772 		ipr_log_vpd(&dev_entry->new_vpd);
1773 
1774 		ipr_err("Cache Directory Card Information:\n");
1775 		ipr_log_vpd(&dev_entry->ioa_last_with_dev_vpd);
1776 
1777 		ipr_err("Adapter Card Information:\n");
1778 		ipr_log_vpd(&dev_entry->cfc_last_with_dev_vpd);
1779 
1780 		ipr_err("Additional IOA Data: %08X %08X %08X %08X %08X\n",
1781 			be32_to_cpu(dev_entry->ioa_data[0]),
1782 			be32_to_cpu(dev_entry->ioa_data[1]),
1783 			be32_to_cpu(dev_entry->ioa_data[2]),
1784 			be32_to_cpu(dev_entry->ioa_data[3]),
1785 			be32_to_cpu(dev_entry->ioa_data[4]));
1786 	}
1787 }
1788 
1789 /**
1790  * ipr_log_enhanced_array_error - Log an array configuration error.
1791  * @ioa_cfg:	ioa config struct
1792  * @hostrcb:	hostrcb struct
1793  *
1794  * Return value:
1795  * 	none
1796  **/
1797 static void ipr_log_enhanced_array_error(struct ipr_ioa_cfg *ioa_cfg,
1798 					 struct ipr_hostrcb *hostrcb)
1799 {
1800 	int i, num_entries;
1801 	struct ipr_hostrcb_type_14_error *error;
1802 	struct ipr_hostrcb_array_data_entry_enhanced *array_entry;
1803 	const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '0' };
1804 
1805 	error = &hostrcb->hcam.u.error.u.type_14_error;
1806 
1807 	ipr_err_separator;
1808 
1809 	ipr_err("RAID %s Array Configuration: %d:%d:%d:%d\n",
1810 		error->protection_level,
1811 		ioa_cfg->host->host_no,
1812 		error->last_func_vset_res_addr.bus,
1813 		error->last_func_vset_res_addr.target,
1814 		error->last_func_vset_res_addr.lun);
1815 
1816 	ipr_err_separator;
1817 
1818 	array_entry = error->array_member;
1819 	num_entries = min_t(u32, be32_to_cpu(error->num_entries),
1820 			    ARRAY_SIZE(error->array_member));
1821 
1822 	for (i = 0; i < num_entries; i++, array_entry++) {
1823 		if (!memcmp(array_entry->vpd.vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
1824 			continue;
1825 
1826 		if (be32_to_cpu(error->exposed_mode_adn) == i)
1827 			ipr_err("Exposed Array Member %d:\n", i);
1828 		else
1829 			ipr_err("Array Member %d:\n", i);
1830 
1831 		ipr_log_ext_vpd(&array_entry->vpd);
1832 		ipr_phys_res_err(ioa_cfg, array_entry->dev_res_addr, "Current Location");
1833 		ipr_phys_res_err(ioa_cfg, array_entry->expected_dev_res_addr,
1834 				 "Expected Location");
1835 
1836 		ipr_err_separator;
1837 	}
1838 }
1839 
1840 /**
1841  * ipr_log_array_error - Log an array configuration error.
1842  * @ioa_cfg:	ioa config struct
1843  * @hostrcb:	hostrcb struct
1844  *
1845  * Return value:
1846  * 	none
1847  **/
1848 static void ipr_log_array_error(struct ipr_ioa_cfg *ioa_cfg,
1849 				struct ipr_hostrcb *hostrcb)
1850 {
1851 	int i;
1852 	struct ipr_hostrcb_type_04_error *error;
1853 	struct ipr_hostrcb_array_data_entry *array_entry;
1854 	const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '0' };
1855 
1856 	error = &hostrcb->hcam.u.error.u.type_04_error;
1857 
1858 	ipr_err_separator;
1859 
1860 	ipr_err("RAID %s Array Configuration: %d:%d:%d:%d\n",
1861 		error->protection_level,
1862 		ioa_cfg->host->host_no,
1863 		error->last_func_vset_res_addr.bus,
1864 		error->last_func_vset_res_addr.target,
1865 		error->last_func_vset_res_addr.lun);
1866 
1867 	ipr_err_separator;
1868 
1869 	array_entry = error->array_member;
1870 
1871 	for (i = 0; i < 18; i++) {
1872 		if (!memcmp(array_entry->vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
1873 			continue;
1874 
1875 		if (be32_to_cpu(error->exposed_mode_adn) == i)
1876 			ipr_err("Exposed Array Member %d:\n", i);
1877 		else
1878 			ipr_err("Array Member %d:\n", i);
1879 
1880 		ipr_log_vpd(&array_entry->vpd);
1881 
1882 		ipr_phys_res_err(ioa_cfg, array_entry->dev_res_addr, "Current Location");
1883 		ipr_phys_res_err(ioa_cfg, array_entry->expected_dev_res_addr,
1884 				 "Expected Location");
1885 
1886 		ipr_err_separator;
1887 
1888 		if (i == 9)
1889 			array_entry = error->array_member2;
1890 		else
1891 			array_entry++;
1892 	}
1893 }
1894 
1895 /**
1896  * ipr_log_hex_data - Log additional hex IOA error data.
1897  * @ioa_cfg:	ioa config struct
1898  * @data:		IOA error data
1899  * @len:		data length
1900  *
1901  * Return value:
1902  * 	none
1903  **/
1904 static void ipr_log_hex_data(struct ipr_ioa_cfg *ioa_cfg, __be32 *data, int len)
1905 {
1906 	int i;
1907 
1908 	if (len == 0)
1909 		return;
1910 
1911 	if (ioa_cfg->log_level <= IPR_DEFAULT_LOG_LEVEL)
1912 		len = min_t(int, len, IPR_DEFAULT_MAX_ERROR_DUMP);
1913 
1914 	for (i = 0; i < len / 4; i += 4) {
1915 		ipr_err("%08X: %08X %08X %08X %08X\n", i*4,
1916 			be32_to_cpu(data[i]),
1917 			be32_to_cpu(data[i+1]),
1918 			be32_to_cpu(data[i+2]),
1919 			be32_to_cpu(data[i+3]));
1920 	}
1921 }
1922 
1923 /**
1924  * ipr_log_enhanced_dual_ioa_error - Log an enhanced dual adapter error.
1925  * @ioa_cfg:	ioa config struct
1926  * @hostrcb:	hostrcb struct
1927  *
1928  * Return value:
1929  * 	none
1930  **/
1931 static void ipr_log_enhanced_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
1932 					    struct ipr_hostrcb *hostrcb)
1933 {
1934 	struct ipr_hostrcb_type_17_error *error;
1935 
1936 	if (ioa_cfg->sis64)
1937 		error = &hostrcb->hcam.u.error64.u.type_17_error;
1938 	else
1939 		error = &hostrcb->hcam.u.error.u.type_17_error;
1940 
1941 	error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
1942 	strim(error->failure_reason);
1943 
1944 	ipr_hcam_err(hostrcb, "%s [PRC: %08X]\n", error->failure_reason,
1945 		     be32_to_cpu(hostrcb->hcam.u.error.prc));
1946 	ipr_log_ext_vpd_compact("Remote IOA", hostrcb, &error->vpd);
1947 	ipr_log_hex_data(ioa_cfg, error->data,
1948 			 be32_to_cpu(hostrcb->hcam.length) -
1949 			 (offsetof(struct ipr_hostrcb_error, u) +
1950 			  offsetof(struct ipr_hostrcb_type_17_error, data)));
1951 }
1952 
1953 /**
1954  * ipr_log_dual_ioa_error - Log a dual adapter error.
1955  * @ioa_cfg:	ioa config struct
1956  * @hostrcb:	hostrcb struct
1957  *
1958  * Return value:
1959  * 	none
1960  **/
1961 static void ipr_log_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
1962 				   struct ipr_hostrcb *hostrcb)
1963 {
1964 	struct ipr_hostrcb_type_07_error *error;
1965 
1966 	error = &hostrcb->hcam.u.error.u.type_07_error;
1967 	error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
1968 	strim(error->failure_reason);
1969 
1970 	ipr_hcam_err(hostrcb, "%s [PRC: %08X]\n", error->failure_reason,
1971 		     be32_to_cpu(hostrcb->hcam.u.error.prc));
1972 	ipr_log_vpd_compact("Remote IOA", hostrcb, &error->vpd);
1973 	ipr_log_hex_data(ioa_cfg, error->data,
1974 			 be32_to_cpu(hostrcb->hcam.length) -
1975 			 (offsetof(struct ipr_hostrcb_error, u) +
1976 			  offsetof(struct ipr_hostrcb_type_07_error, data)));
1977 }
1978 
1979 static const struct {
1980 	u8 active;
1981 	char *desc;
1982 } path_active_desc[] = {
1983 	{ IPR_PATH_NO_INFO, "Path" },
1984 	{ IPR_PATH_ACTIVE, "Active path" },
1985 	{ IPR_PATH_NOT_ACTIVE, "Inactive path" }
1986 };
1987 
1988 static const struct {
1989 	u8 state;
1990 	char *desc;
1991 } path_state_desc[] = {
1992 	{ IPR_PATH_STATE_NO_INFO, "has no path state information available" },
1993 	{ IPR_PATH_HEALTHY, "is healthy" },
1994 	{ IPR_PATH_DEGRADED, "is degraded" },
1995 	{ IPR_PATH_FAILED, "is failed" }
1996 };
1997 
1998 /**
1999  * ipr_log_fabric_path - Log a fabric path error
2000  * @hostrcb:	hostrcb struct
2001  * @fabric:		fabric descriptor
2002  *
2003  * Return value:
2004  * 	none
2005  **/
2006 static void ipr_log_fabric_path(struct ipr_hostrcb *hostrcb,
2007 				struct ipr_hostrcb_fabric_desc *fabric)
2008 {
2009 	int i, j;
2010 	u8 path_state = fabric->path_state;
2011 	u8 active = path_state & IPR_PATH_ACTIVE_MASK;
2012 	u8 state = path_state & IPR_PATH_STATE_MASK;
2013 
2014 	for (i = 0; i < ARRAY_SIZE(path_active_desc); i++) {
2015 		if (path_active_desc[i].active != active)
2016 			continue;
2017 
2018 		for (j = 0; j < ARRAY_SIZE(path_state_desc); j++) {
2019 			if (path_state_desc[j].state != state)
2020 				continue;
2021 
2022 			if (fabric->cascaded_expander == 0xff && fabric->phy == 0xff) {
2023 				ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d\n",
2024 					     path_active_desc[i].desc, path_state_desc[j].desc,
2025 					     fabric->ioa_port);
2026 			} else if (fabric->cascaded_expander == 0xff) {
2027 				ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Phy=%d\n",
2028 					     path_active_desc[i].desc, path_state_desc[j].desc,
2029 					     fabric->ioa_port, fabric->phy);
2030 			} else if (fabric->phy == 0xff) {
2031 				ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Cascade=%d\n",
2032 					     path_active_desc[i].desc, path_state_desc[j].desc,
2033 					     fabric->ioa_port, fabric->cascaded_expander);
2034 			} else {
2035 				ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Cascade=%d, Phy=%d\n",
2036 					     path_active_desc[i].desc, path_state_desc[j].desc,
2037 					     fabric->ioa_port, fabric->cascaded_expander, fabric->phy);
2038 			}
2039 			return;
2040 		}
2041 	}
2042 
2043 	ipr_err("Path state=%02X IOA Port=%d Cascade=%d Phy=%d\n", path_state,
2044 		fabric->ioa_port, fabric->cascaded_expander, fabric->phy);
2045 }
2046 
2047 /**
2048  * ipr_log64_fabric_path - Log a fabric path error
2049  * @hostrcb:	hostrcb struct
2050  * @fabric:		fabric descriptor
2051  *
2052  * Return value:
2053  * 	none
2054  **/
2055 static void ipr_log64_fabric_path(struct ipr_hostrcb *hostrcb,
2056 				  struct ipr_hostrcb64_fabric_desc *fabric)
2057 {
2058 	int i, j;
2059 	u8 path_state = fabric->path_state;
2060 	u8 active = path_state & IPR_PATH_ACTIVE_MASK;
2061 	u8 state = path_state & IPR_PATH_STATE_MASK;
2062 	char buffer[IPR_MAX_RES_PATH_LENGTH];
2063 
2064 	for (i = 0; i < ARRAY_SIZE(path_active_desc); i++) {
2065 		if (path_active_desc[i].active != active)
2066 			continue;
2067 
2068 		for (j = 0; j < ARRAY_SIZE(path_state_desc); j++) {
2069 			if (path_state_desc[j].state != state)
2070 				continue;
2071 
2072 			ipr_hcam_err(hostrcb, "%s %s: Resource Path=%s\n",
2073 				     path_active_desc[i].desc, path_state_desc[j].desc,
2074 				     ipr_format_res_path(hostrcb->ioa_cfg,
2075 						fabric->res_path,
2076 						buffer, sizeof(buffer)));
2077 			return;
2078 		}
2079 	}
2080 
2081 	ipr_err("Path state=%02X Resource Path=%s\n", path_state,
2082 		ipr_format_res_path(hostrcb->ioa_cfg, fabric->res_path,
2083 				    buffer, sizeof(buffer)));
2084 }
2085 
2086 static const struct {
2087 	u8 type;
2088 	char *desc;
2089 } path_type_desc[] = {
2090 	{ IPR_PATH_CFG_IOA_PORT, "IOA port" },
2091 	{ IPR_PATH_CFG_EXP_PORT, "Expander port" },
2092 	{ IPR_PATH_CFG_DEVICE_PORT, "Device port" },
2093 	{ IPR_PATH_CFG_DEVICE_LUN, "Device LUN" }
2094 };
2095 
2096 static const struct {
2097 	u8 status;
2098 	char *desc;
2099 } path_status_desc[] = {
2100 	{ IPR_PATH_CFG_NO_PROB, "Functional" },
2101 	{ IPR_PATH_CFG_DEGRADED, "Degraded" },
2102 	{ IPR_PATH_CFG_FAILED, "Failed" },
2103 	{ IPR_PATH_CFG_SUSPECT, "Suspect" },
2104 	{ IPR_PATH_NOT_DETECTED, "Missing" },
2105 	{ IPR_PATH_INCORRECT_CONN, "Incorrectly connected" }
2106 };
2107 
2108 static const char *link_rate[] = {
2109 	"unknown",
2110 	"disabled",
2111 	"phy reset problem",
2112 	"spinup hold",
2113 	"port selector",
2114 	"unknown",
2115 	"unknown",
2116 	"unknown",
2117 	"1.5Gbps",
2118 	"3.0Gbps",
2119 	"unknown",
2120 	"unknown",
2121 	"unknown",
2122 	"unknown",
2123 	"unknown",
2124 	"unknown"
2125 };
2126 
2127 /**
2128  * ipr_log_path_elem - Log a fabric path element.
2129  * @hostrcb:	hostrcb struct
2130  * @cfg:		fabric path element struct
2131  *
2132  * Return value:
2133  * 	none
2134  **/
2135 static void ipr_log_path_elem(struct ipr_hostrcb *hostrcb,
2136 			      struct ipr_hostrcb_config_element *cfg)
2137 {
2138 	int i, j;
2139 	u8 type = cfg->type_status & IPR_PATH_CFG_TYPE_MASK;
2140 	u8 status = cfg->type_status & IPR_PATH_CFG_STATUS_MASK;
2141 
2142 	if (type == IPR_PATH_CFG_NOT_EXIST)
2143 		return;
2144 
2145 	for (i = 0; i < ARRAY_SIZE(path_type_desc); i++) {
2146 		if (path_type_desc[i].type != type)
2147 			continue;
2148 
2149 		for (j = 0; j < ARRAY_SIZE(path_status_desc); j++) {
2150 			if (path_status_desc[j].status != status)
2151 				continue;
2152 
2153 			if (type == IPR_PATH_CFG_IOA_PORT) {
2154 				ipr_hcam_err(hostrcb, "%s %s: Phy=%d, Link rate=%s, WWN=%08X%08X\n",
2155 					     path_status_desc[j].desc, path_type_desc[i].desc,
2156 					     cfg->phy, link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2157 					     be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2158 			} else {
2159 				if (cfg->cascaded_expander == 0xff && cfg->phy == 0xff) {
2160 					ipr_hcam_err(hostrcb, "%s %s: Link rate=%s, WWN=%08X%08X\n",
2161 						     path_status_desc[j].desc, path_type_desc[i].desc,
2162 						     link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2163 						     be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2164 				} else if (cfg->cascaded_expander == 0xff) {
2165 					ipr_hcam_err(hostrcb, "%s %s: Phy=%d, Link rate=%s, "
2166 						     "WWN=%08X%08X\n", path_status_desc[j].desc,
2167 						     path_type_desc[i].desc, cfg->phy,
2168 						     link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2169 						     be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2170 				} else if (cfg->phy == 0xff) {
2171 					ipr_hcam_err(hostrcb, "%s %s: Cascade=%d, Link rate=%s, "
2172 						     "WWN=%08X%08X\n", path_status_desc[j].desc,
2173 						     path_type_desc[i].desc, cfg->cascaded_expander,
2174 						     link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2175 						     be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2176 				} else {
2177 					ipr_hcam_err(hostrcb, "%s %s: Cascade=%d, Phy=%d, Link rate=%s "
2178 						     "WWN=%08X%08X\n", path_status_desc[j].desc,
2179 						     path_type_desc[i].desc, cfg->cascaded_expander, cfg->phy,
2180 						     link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2181 						     be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2182 				}
2183 			}
2184 			return;
2185 		}
2186 	}
2187 
2188 	ipr_hcam_err(hostrcb, "Path element=%02X: Cascade=%d Phy=%d Link rate=%s "
2189 		     "WWN=%08X%08X\n", cfg->type_status, cfg->cascaded_expander, cfg->phy,
2190 		     link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2191 		     be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2192 }
2193 
2194 /**
2195  * ipr_log64_path_elem - Log a fabric path element.
2196  * @hostrcb:	hostrcb struct
2197  * @cfg:		fabric path element struct
2198  *
2199  * Return value:
2200  * 	none
2201  **/
2202 static void ipr_log64_path_elem(struct ipr_hostrcb *hostrcb,
2203 				struct ipr_hostrcb64_config_element *cfg)
2204 {
2205 	int i, j;
2206 	u8 desc_id = cfg->descriptor_id & IPR_DESCRIPTOR_MASK;
2207 	u8 type = cfg->type_status & IPR_PATH_CFG_TYPE_MASK;
2208 	u8 status = cfg->type_status & IPR_PATH_CFG_STATUS_MASK;
2209 	char buffer[IPR_MAX_RES_PATH_LENGTH];
2210 
2211 	if (type == IPR_PATH_CFG_NOT_EXIST || desc_id != IPR_DESCRIPTOR_SIS64)
2212 		return;
2213 
2214 	for (i = 0; i < ARRAY_SIZE(path_type_desc); i++) {
2215 		if (path_type_desc[i].type != type)
2216 			continue;
2217 
2218 		for (j = 0; j < ARRAY_SIZE(path_status_desc); j++) {
2219 			if (path_status_desc[j].status != status)
2220 				continue;
2221 
2222 			ipr_hcam_err(hostrcb, "%s %s: Resource Path=%s, Link rate=%s, WWN=%08X%08X\n",
2223 				     path_status_desc[j].desc, path_type_desc[i].desc,
2224 				     ipr_format_res_path(hostrcb->ioa_cfg,
2225 					cfg->res_path, buffer, sizeof(buffer)),
2226 					link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2227 					be32_to_cpu(cfg->wwid[0]),
2228 					be32_to_cpu(cfg->wwid[1]));
2229 			return;
2230 		}
2231 	}
2232 	ipr_hcam_err(hostrcb, "Path element=%02X: Resource Path=%s, Link rate=%s "
2233 		     "WWN=%08X%08X\n", cfg->type_status,
2234 		     ipr_format_res_path(hostrcb->ioa_cfg,
2235 			cfg->res_path, buffer, sizeof(buffer)),
2236 			link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
2237 			be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
2238 }
2239 
2240 /**
2241  * ipr_log_fabric_error - Log a fabric error.
2242  * @ioa_cfg:	ioa config struct
2243  * @hostrcb:	hostrcb struct
2244  *
2245  * Return value:
2246  * 	none
2247  **/
2248 static void ipr_log_fabric_error(struct ipr_ioa_cfg *ioa_cfg,
2249 				 struct ipr_hostrcb *hostrcb)
2250 {
2251 	struct ipr_hostrcb_type_20_error *error;
2252 	struct ipr_hostrcb_fabric_desc *fabric;
2253 	struct ipr_hostrcb_config_element *cfg;
2254 	int i, add_len;
2255 
2256 	error = &hostrcb->hcam.u.error.u.type_20_error;
2257 	error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
2258 	ipr_hcam_err(hostrcb, "%s\n", error->failure_reason);
2259 
2260 	add_len = be32_to_cpu(hostrcb->hcam.length) -
2261 		(offsetof(struct ipr_hostrcb_error, u) +
2262 		 offsetof(struct ipr_hostrcb_type_20_error, desc));
2263 
2264 	for (i = 0, fabric = error->desc; i < error->num_entries; i++) {
2265 		ipr_log_fabric_path(hostrcb, fabric);
2266 		for_each_fabric_cfg(fabric, cfg)
2267 			ipr_log_path_elem(hostrcb, cfg);
2268 
2269 		add_len -= be16_to_cpu(fabric->length);
2270 		fabric = (struct ipr_hostrcb_fabric_desc *)
2271 			((unsigned long)fabric + be16_to_cpu(fabric->length));
2272 	}
2273 
2274 	ipr_log_hex_data(ioa_cfg, (__be32 *)fabric, add_len);
2275 }
2276 
2277 /**
2278  * ipr_log_sis64_array_error - Log a sis64 array error.
2279  * @ioa_cfg:	ioa config struct
2280  * @hostrcb:	hostrcb struct
2281  *
2282  * Return value:
2283  * 	none
2284  **/
2285 static void ipr_log_sis64_array_error(struct ipr_ioa_cfg *ioa_cfg,
2286 				      struct ipr_hostrcb *hostrcb)
2287 {
2288 	int i, num_entries;
2289 	struct ipr_hostrcb_type_24_error *error;
2290 	struct ipr_hostrcb64_array_data_entry *array_entry;
2291 	char buffer[IPR_MAX_RES_PATH_LENGTH];
2292 	const u8 zero_sn[IPR_SERIAL_NUM_LEN] = { [0 ... IPR_SERIAL_NUM_LEN-1] = '0' };
2293 
2294 	error = &hostrcb->hcam.u.error64.u.type_24_error;
2295 
2296 	ipr_err_separator;
2297 
2298 	ipr_err("RAID %s Array Configuration: %s\n",
2299 		error->protection_level,
2300 		ipr_format_res_path(ioa_cfg, error->last_res_path,
2301 			buffer, sizeof(buffer)));
2302 
2303 	ipr_err_separator;
2304 
2305 	array_entry = error->array_member;
2306 	num_entries = min_t(u32, error->num_entries,
2307 			    ARRAY_SIZE(error->array_member));
2308 
2309 	for (i = 0; i < num_entries; i++, array_entry++) {
2310 
2311 		if (!memcmp(array_entry->vpd.vpd.sn, zero_sn, IPR_SERIAL_NUM_LEN))
2312 			continue;
2313 
2314 		if (error->exposed_mode_adn == i)
2315 			ipr_err("Exposed Array Member %d:\n", i);
2316 		else
2317 			ipr_err("Array Member %d:\n", i);
2318 
2319 		ipr_err("Array Member %d:\n", i);
2320 		ipr_log_ext_vpd(&array_entry->vpd);
2321 		ipr_err("Current Location: %s\n",
2322 			 ipr_format_res_path(ioa_cfg, array_entry->res_path,
2323 				buffer, sizeof(buffer)));
2324 		ipr_err("Expected Location: %s\n",
2325 			 ipr_format_res_path(ioa_cfg,
2326 				array_entry->expected_res_path,
2327 				buffer, sizeof(buffer)));
2328 
2329 		ipr_err_separator;
2330 	}
2331 }
2332 
2333 /**
2334  * ipr_log_sis64_fabric_error - Log a sis64 fabric error.
2335  * @ioa_cfg:	ioa config struct
2336  * @hostrcb:	hostrcb struct
2337  *
2338  * Return value:
2339  * 	none
2340  **/
2341 static void ipr_log_sis64_fabric_error(struct ipr_ioa_cfg *ioa_cfg,
2342 				       struct ipr_hostrcb *hostrcb)
2343 {
2344 	struct ipr_hostrcb_type_30_error *error;
2345 	struct ipr_hostrcb64_fabric_desc *fabric;
2346 	struct ipr_hostrcb64_config_element *cfg;
2347 	int i, add_len;
2348 
2349 	error = &hostrcb->hcam.u.error64.u.type_30_error;
2350 
2351 	error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
2352 	ipr_hcam_err(hostrcb, "%s\n", error->failure_reason);
2353 
2354 	add_len = be32_to_cpu(hostrcb->hcam.length) -
2355 		(offsetof(struct ipr_hostrcb64_error, u) +
2356 		 offsetof(struct ipr_hostrcb_type_30_error, desc));
2357 
2358 	for (i = 0, fabric = error->desc; i < error->num_entries; i++) {
2359 		ipr_log64_fabric_path(hostrcb, fabric);
2360 		for_each_fabric_cfg(fabric, cfg)
2361 			ipr_log64_path_elem(hostrcb, cfg);
2362 
2363 		add_len -= be16_to_cpu(fabric->length);
2364 		fabric = (struct ipr_hostrcb64_fabric_desc *)
2365 			((unsigned long)fabric + be16_to_cpu(fabric->length));
2366 	}
2367 
2368 	ipr_log_hex_data(ioa_cfg, (__be32 *)fabric, add_len);
2369 }
2370 
2371 /**
2372  * ipr_log_generic_error - Log an adapter error.
2373  * @ioa_cfg:	ioa config struct
2374  * @hostrcb:	hostrcb struct
2375  *
2376  * Return value:
2377  * 	none
2378  **/
2379 static void ipr_log_generic_error(struct ipr_ioa_cfg *ioa_cfg,
2380 				  struct ipr_hostrcb *hostrcb)
2381 {
2382 	ipr_log_hex_data(ioa_cfg, hostrcb->hcam.u.raw.data,
2383 			 be32_to_cpu(hostrcb->hcam.length));
2384 }
2385 
2386 /**
2387  * ipr_log_sis64_device_error - Log a cache error.
2388  * @ioa_cfg:	ioa config struct
2389  * @hostrcb:	hostrcb struct
2390  *
2391  * Return value:
2392  * 	none
2393  **/
2394 static void ipr_log_sis64_device_error(struct ipr_ioa_cfg *ioa_cfg,
2395 					 struct ipr_hostrcb *hostrcb)
2396 {
2397 	struct ipr_hostrcb_type_21_error *error;
2398 	char buffer[IPR_MAX_RES_PATH_LENGTH];
2399 
2400 	error = &hostrcb->hcam.u.error64.u.type_21_error;
2401 
2402 	ipr_err("-----Failing Device Information-----\n");
2403 	ipr_err("World Wide Unique ID: %08X%08X%08X%08X\n",
2404 		be32_to_cpu(error->wwn[0]), be32_to_cpu(error->wwn[1]),
2405 		 be32_to_cpu(error->wwn[2]), be32_to_cpu(error->wwn[3]));
2406 	ipr_err("Device Resource Path: %s\n",
2407 		__ipr_format_res_path(error->res_path,
2408 				      buffer, sizeof(buffer)));
2409 	error->primary_problem_desc[sizeof(error->primary_problem_desc) - 1] = '\0';
2410 	error->second_problem_desc[sizeof(error->second_problem_desc) - 1] = '\0';
2411 	ipr_err("Primary Problem Description: %s\n", error->primary_problem_desc);
2412 	ipr_err("Secondary Problem Description:  %s\n", error->second_problem_desc);
2413 	ipr_err("SCSI Sense Data:\n");
2414 	ipr_log_hex_data(ioa_cfg, error->sense_data, sizeof(error->sense_data));
2415 	ipr_err("SCSI Command Descriptor Block: \n");
2416 	ipr_log_hex_data(ioa_cfg, error->cdb, sizeof(error->cdb));
2417 
2418 	ipr_err("Additional IOA Data:\n");
2419 	ipr_log_hex_data(ioa_cfg, error->ioa_data, be32_to_cpu(error->length_of_error));
2420 }
2421 
2422 /**
2423  * ipr_get_error - Find the specfied IOASC in the ipr_error_table.
2424  * @ioasc:	IOASC
2425  *
2426  * This function will return the index of into the ipr_error_table
2427  * for the specified IOASC. If the IOASC is not in the table,
2428  * 0 will be returned, which points to the entry used for unknown errors.
2429  *
2430  * Return value:
2431  * 	index into the ipr_error_table
2432  **/
2433 static u32 ipr_get_error(u32 ioasc)
2434 {
2435 	int i;
2436 
2437 	for (i = 0; i < ARRAY_SIZE(ipr_error_table); i++)
2438 		if (ipr_error_table[i].ioasc == (ioasc & IPR_IOASC_IOASC_MASK))
2439 			return i;
2440 
2441 	return 0;
2442 }
2443 
2444 /**
2445  * ipr_handle_log_data - Log an adapter error.
2446  * @ioa_cfg:	ioa config struct
2447  * @hostrcb:	hostrcb struct
2448  *
2449  * This function logs an adapter error to the system.
2450  *
2451  * Return value:
2452  * 	none
2453  **/
2454 static void ipr_handle_log_data(struct ipr_ioa_cfg *ioa_cfg,
2455 				struct ipr_hostrcb *hostrcb)
2456 {
2457 	u32 ioasc;
2458 	int error_index;
2459 	struct ipr_hostrcb_type_21_error *error;
2460 
2461 	if (hostrcb->hcam.notify_type != IPR_HOST_RCB_NOTIF_TYPE_ERROR_LOG_ENTRY)
2462 		return;
2463 
2464 	if (hostrcb->hcam.notifications_lost == IPR_HOST_RCB_NOTIFICATIONS_LOST)
2465 		dev_err(&ioa_cfg->pdev->dev, "Error notifications lost\n");
2466 
2467 	if (ioa_cfg->sis64)
2468 		ioasc = be32_to_cpu(hostrcb->hcam.u.error64.fd_ioasc);
2469 	else
2470 		ioasc = be32_to_cpu(hostrcb->hcam.u.error.fd_ioasc);
2471 
2472 	if (!ioa_cfg->sis64 && (ioasc == IPR_IOASC_BUS_WAS_RESET ||
2473 	    ioasc == IPR_IOASC_BUS_WAS_RESET_BY_OTHER)) {
2474 		/* Tell the midlayer we had a bus reset so it will handle the UA properly */
2475 		scsi_report_bus_reset(ioa_cfg->host,
2476 				      hostrcb->hcam.u.error.fd_res_addr.bus);
2477 	}
2478 
2479 	error_index = ipr_get_error(ioasc);
2480 
2481 	if (!ipr_error_table[error_index].log_hcam)
2482 		return;
2483 
2484 	if (ioasc == IPR_IOASC_HW_CMD_FAILED &&
2485 	    hostrcb->hcam.overlay_id == IPR_HOST_RCB_OVERLAY_ID_21) {
2486 		error = &hostrcb->hcam.u.error64.u.type_21_error;
2487 
2488 		if (((be32_to_cpu(error->sense_data[0]) & 0x0000ff00) >> 8) == ILLEGAL_REQUEST &&
2489 			ioa_cfg->log_level <= IPR_DEFAULT_LOG_LEVEL)
2490 				return;
2491 	}
2492 
2493 	ipr_hcam_err(hostrcb, "%s\n", ipr_error_table[error_index].error);
2494 
2495 	/* Set indication we have logged an error */
2496 	ioa_cfg->errors_logged++;
2497 
2498 	if (ioa_cfg->log_level < ipr_error_table[error_index].log_hcam)
2499 		return;
2500 	if (be32_to_cpu(hostrcb->hcam.length) > sizeof(hostrcb->hcam.u.raw))
2501 		hostrcb->hcam.length = cpu_to_be32(sizeof(hostrcb->hcam.u.raw));
2502 
2503 	switch (hostrcb->hcam.overlay_id) {
2504 	case IPR_HOST_RCB_OVERLAY_ID_2:
2505 		ipr_log_cache_error(ioa_cfg, hostrcb);
2506 		break;
2507 	case IPR_HOST_RCB_OVERLAY_ID_3:
2508 		ipr_log_config_error(ioa_cfg, hostrcb);
2509 		break;
2510 	case IPR_HOST_RCB_OVERLAY_ID_4:
2511 	case IPR_HOST_RCB_OVERLAY_ID_6:
2512 		ipr_log_array_error(ioa_cfg, hostrcb);
2513 		break;
2514 	case IPR_HOST_RCB_OVERLAY_ID_7:
2515 		ipr_log_dual_ioa_error(ioa_cfg, hostrcb);
2516 		break;
2517 	case IPR_HOST_RCB_OVERLAY_ID_12:
2518 		ipr_log_enhanced_cache_error(ioa_cfg, hostrcb);
2519 		break;
2520 	case IPR_HOST_RCB_OVERLAY_ID_13:
2521 		ipr_log_enhanced_config_error(ioa_cfg, hostrcb);
2522 		break;
2523 	case IPR_HOST_RCB_OVERLAY_ID_14:
2524 	case IPR_HOST_RCB_OVERLAY_ID_16:
2525 		ipr_log_enhanced_array_error(ioa_cfg, hostrcb);
2526 		break;
2527 	case IPR_HOST_RCB_OVERLAY_ID_17:
2528 		ipr_log_enhanced_dual_ioa_error(ioa_cfg, hostrcb);
2529 		break;
2530 	case IPR_HOST_RCB_OVERLAY_ID_20:
2531 		ipr_log_fabric_error(ioa_cfg, hostrcb);
2532 		break;
2533 	case IPR_HOST_RCB_OVERLAY_ID_21:
2534 		ipr_log_sis64_device_error(ioa_cfg, hostrcb);
2535 		break;
2536 	case IPR_HOST_RCB_OVERLAY_ID_23:
2537 		ipr_log_sis64_config_error(ioa_cfg, hostrcb);
2538 		break;
2539 	case IPR_HOST_RCB_OVERLAY_ID_24:
2540 	case IPR_HOST_RCB_OVERLAY_ID_26:
2541 		ipr_log_sis64_array_error(ioa_cfg, hostrcb);
2542 		break;
2543 	case IPR_HOST_RCB_OVERLAY_ID_30:
2544 		ipr_log_sis64_fabric_error(ioa_cfg, hostrcb);
2545 		break;
2546 	case IPR_HOST_RCB_OVERLAY_ID_1:
2547 	case IPR_HOST_RCB_OVERLAY_ID_DEFAULT:
2548 	default:
2549 		ipr_log_generic_error(ioa_cfg, hostrcb);
2550 		break;
2551 	}
2552 }
2553 
2554 /**
2555  * ipr_process_error - Op done function for an adapter error log.
2556  * @ipr_cmd:	ipr command struct
2557  *
2558  * This function is the op done function for an error log host
2559  * controlled async from the adapter. It will log the error and
2560  * send the HCAM back to the adapter.
2561  *
2562  * Return value:
2563  * 	none
2564  **/
2565 static void ipr_process_error(struct ipr_cmnd *ipr_cmd)
2566 {
2567 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
2568 	struct ipr_hostrcb *hostrcb = ipr_cmd->u.hostrcb;
2569 	u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
2570 	u32 fd_ioasc;
2571 
2572 	if (ioa_cfg->sis64)
2573 		fd_ioasc = be32_to_cpu(hostrcb->hcam.u.error64.fd_ioasc);
2574 	else
2575 		fd_ioasc = be32_to_cpu(hostrcb->hcam.u.error.fd_ioasc);
2576 
2577 	list_del(&hostrcb->queue);
2578 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
2579 
2580 	if (!ioasc) {
2581 		ipr_handle_log_data(ioa_cfg, hostrcb);
2582 		if (fd_ioasc == IPR_IOASC_NR_IOA_RESET_REQUIRED)
2583 			ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_ABBREV);
2584 	} else if (ioasc != IPR_IOASC_IOA_WAS_RESET &&
2585 		   ioasc != IPR_IOASC_ABORTED_CMD_TERM_BY_HOST) {
2586 		dev_err(&ioa_cfg->pdev->dev,
2587 			"Host RCB failed with IOASC: 0x%08X\n", ioasc);
2588 	}
2589 
2590 	ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_LOG_DATA, hostrcb);
2591 }
2592 
2593 /**
2594  * ipr_timeout -  An internally generated op has timed out.
2595  * @ipr_cmd:	ipr command struct
2596  *
2597  * This function blocks host requests and initiates an
2598  * adapter reset.
2599  *
2600  * Return value:
2601  * 	none
2602  **/
2603 static void ipr_timeout(struct ipr_cmnd *ipr_cmd)
2604 {
2605 	unsigned long lock_flags = 0;
2606 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
2607 
2608 	ENTER;
2609 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2610 
2611 	ioa_cfg->errors_logged++;
2612 	dev_err(&ioa_cfg->pdev->dev,
2613 		"Adapter being reset due to command timeout.\n");
2614 
2615 	if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
2616 		ioa_cfg->sdt_state = GET_DUMP;
2617 
2618 	if (!ioa_cfg->in_reset_reload || ioa_cfg->reset_cmd == ipr_cmd)
2619 		ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
2620 
2621 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2622 	LEAVE;
2623 }
2624 
2625 /**
2626  * ipr_oper_timeout -  Adapter timed out transitioning to operational
2627  * @ipr_cmd:	ipr command struct
2628  *
2629  * This function blocks host requests and initiates an
2630  * adapter reset.
2631  *
2632  * Return value:
2633  * 	none
2634  **/
2635 static void ipr_oper_timeout(struct ipr_cmnd *ipr_cmd)
2636 {
2637 	unsigned long lock_flags = 0;
2638 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
2639 
2640 	ENTER;
2641 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2642 
2643 	ioa_cfg->errors_logged++;
2644 	dev_err(&ioa_cfg->pdev->dev,
2645 		"Adapter timed out transitioning to operational.\n");
2646 
2647 	if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
2648 		ioa_cfg->sdt_state = GET_DUMP;
2649 
2650 	if (!ioa_cfg->in_reset_reload || ioa_cfg->reset_cmd == ipr_cmd) {
2651 		if (ipr_fastfail)
2652 			ioa_cfg->reset_retries += IPR_NUM_RESET_RELOAD_RETRIES;
2653 		ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
2654 	}
2655 
2656 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2657 	LEAVE;
2658 }
2659 
2660 /**
2661  * ipr_find_ses_entry - Find matching SES in SES table
2662  * @res:	resource entry struct of SES
2663  *
2664  * Return value:
2665  * 	pointer to SES table entry / NULL on failure
2666  **/
2667 static const struct ipr_ses_table_entry *
2668 ipr_find_ses_entry(struct ipr_resource_entry *res)
2669 {
2670 	int i, j, matches;
2671 	struct ipr_std_inq_vpids *vpids;
2672 	const struct ipr_ses_table_entry *ste = ipr_ses_table;
2673 
2674 	for (i = 0; i < ARRAY_SIZE(ipr_ses_table); i++, ste++) {
2675 		for (j = 0, matches = 0; j < IPR_PROD_ID_LEN; j++) {
2676 			if (ste->compare_product_id_byte[j] == 'X') {
2677 				vpids = &res->std_inq_data.vpids;
2678 				if (vpids->product_id[j] == ste->product_id[j])
2679 					matches++;
2680 				else
2681 					break;
2682 			} else
2683 				matches++;
2684 		}
2685 
2686 		if (matches == IPR_PROD_ID_LEN)
2687 			return ste;
2688 	}
2689 
2690 	return NULL;
2691 }
2692 
2693 /**
2694  * ipr_get_max_scsi_speed - Determine max SCSI speed for a given bus
2695  * @ioa_cfg:	ioa config struct
2696  * @bus:		SCSI bus
2697  * @bus_width:	bus width
2698  *
2699  * Return value:
2700  *	SCSI bus speed in units of 100KHz, 1600 is 160 MHz
2701  *	For a 2-byte wide SCSI bus, the maximum transfer speed is
2702  *	twice the maximum transfer rate (e.g. for a wide enabled bus,
2703  *	max 160MHz = max 320MB/sec).
2704  **/
2705 static u32 ipr_get_max_scsi_speed(struct ipr_ioa_cfg *ioa_cfg, u8 bus, u8 bus_width)
2706 {
2707 	struct ipr_resource_entry *res;
2708 	const struct ipr_ses_table_entry *ste;
2709 	u32 max_xfer_rate = IPR_MAX_SCSI_RATE(bus_width);
2710 
2711 	/* Loop through each config table entry in the config table buffer */
2712 	list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
2713 		if (!(IPR_IS_SES_DEVICE(res->std_inq_data)))
2714 			continue;
2715 
2716 		if (bus != res->bus)
2717 			continue;
2718 
2719 		if (!(ste = ipr_find_ses_entry(res)))
2720 			continue;
2721 
2722 		max_xfer_rate = (ste->max_bus_speed_limit * 10) / (bus_width / 8);
2723 	}
2724 
2725 	return max_xfer_rate;
2726 }
2727 
2728 /**
2729  * ipr_wait_iodbg_ack - Wait for an IODEBUG ACK from the IOA
2730  * @ioa_cfg:		ioa config struct
2731  * @max_delay:		max delay in micro-seconds to wait
2732  *
2733  * Waits for an IODEBUG ACK from the IOA, doing busy looping.
2734  *
2735  * Return value:
2736  * 	0 on success / other on failure
2737  **/
2738 static int ipr_wait_iodbg_ack(struct ipr_ioa_cfg *ioa_cfg, int max_delay)
2739 {
2740 	volatile u32 pcii_reg;
2741 	int delay = 1;
2742 
2743 	/* Read interrupt reg until IOA signals IO Debug Acknowledge */
2744 	while (delay < max_delay) {
2745 		pcii_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
2746 
2747 		if (pcii_reg & IPR_PCII_IO_DEBUG_ACKNOWLEDGE)
2748 			return 0;
2749 
2750 		/* udelay cannot be used if delay is more than a few milliseconds */
2751 		if ((delay / 1000) > MAX_UDELAY_MS)
2752 			mdelay(delay / 1000);
2753 		else
2754 			udelay(delay);
2755 
2756 		delay += delay;
2757 	}
2758 	return -EIO;
2759 }
2760 
2761 /**
2762  * ipr_get_sis64_dump_data_section - Dump IOA memory
2763  * @ioa_cfg:			ioa config struct
2764  * @start_addr:			adapter address to dump
2765  * @dest:			destination kernel buffer
2766  * @length_in_words:		length to dump in 4 byte words
2767  *
2768  * Return value:
2769  * 	0 on success
2770  **/
2771 static int ipr_get_sis64_dump_data_section(struct ipr_ioa_cfg *ioa_cfg,
2772 					   u32 start_addr,
2773 					   __be32 *dest, u32 length_in_words)
2774 {
2775 	int i;
2776 
2777 	for (i = 0; i < length_in_words; i++) {
2778 		writel(start_addr+(i*4), ioa_cfg->regs.dump_addr_reg);
2779 		*dest = cpu_to_be32(readl(ioa_cfg->regs.dump_data_reg));
2780 		dest++;
2781 	}
2782 
2783 	return 0;
2784 }
2785 
2786 /**
2787  * ipr_get_ldump_data_section - Dump IOA memory
2788  * @ioa_cfg:			ioa config struct
2789  * @start_addr:			adapter address to dump
2790  * @dest:				destination kernel buffer
2791  * @length_in_words:	length to dump in 4 byte words
2792  *
2793  * Return value:
2794  * 	0 on success / -EIO on failure
2795  **/
2796 static int ipr_get_ldump_data_section(struct ipr_ioa_cfg *ioa_cfg,
2797 				      u32 start_addr,
2798 				      __be32 *dest, u32 length_in_words)
2799 {
2800 	volatile u32 temp_pcii_reg;
2801 	int i, delay = 0;
2802 
2803 	if (ioa_cfg->sis64)
2804 		return ipr_get_sis64_dump_data_section(ioa_cfg, start_addr,
2805 						       dest, length_in_words);
2806 
2807 	/* Write IOA interrupt reg starting LDUMP state  */
2808 	writel((IPR_UPROCI_RESET_ALERT | IPR_UPROCI_IO_DEBUG_ALERT),
2809 	       ioa_cfg->regs.set_uproc_interrupt_reg32);
2810 
2811 	/* Wait for IO debug acknowledge */
2812 	if (ipr_wait_iodbg_ack(ioa_cfg,
2813 			       IPR_LDUMP_MAX_LONG_ACK_DELAY_IN_USEC)) {
2814 		dev_err(&ioa_cfg->pdev->dev,
2815 			"IOA dump long data transfer timeout\n");
2816 		return -EIO;
2817 	}
2818 
2819 	/* Signal LDUMP interlocked - clear IO debug ack */
2820 	writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2821 	       ioa_cfg->regs.clr_interrupt_reg);
2822 
2823 	/* Write Mailbox with starting address */
2824 	writel(start_addr, ioa_cfg->ioa_mailbox);
2825 
2826 	/* Signal address valid - clear IOA Reset alert */
2827 	writel(IPR_UPROCI_RESET_ALERT,
2828 	       ioa_cfg->regs.clr_uproc_interrupt_reg32);
2829 
2830 	for (i = 0; i < length_in_words; i++) {
2831 		/* Wait for IO debug acknowledge */
2832 		if (ipr_wait_iodbg_ack(ioa_cfg,
2833 				       IPR_LDUMP_MAX_SHORT_ACK_DELAY_IN_USEC)) {
2834 			dev_err(&ioa_cfg->pdev->dev,
2835 				"IOA dump short data transfer timeout\n");
2836 			return -EIO;
2837 		}
2838 
2839 		/* Read data from mailbox and increment destination pointer */
2840 		*dest = cpu_to_be32(readl(ioa_cfg->ioa_mailbox));
2841 		dest++;
2842 
2843 		/* For all but the last word of data, signal data received */
2844 		if (i < (length_in_words - 1)) {
2845 			/* Signal dump data received - Clear IO debug Ack */
2846 			writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2847 			       ioa_cfg->regs.clr_interrupt_reg);
2848 		}
2849 	}
2850 
2851 	/* Signal end of block transfer. Set reset alert then clear IO debug ack */
2852 	writel(IPR_UPROCI_RESET_ALERT,
2853 	       ioa_cfg->regs.set_uproc_interrupt_reg32);
2854 
2855 	writel(IPR_UPROCI_IO_DEBUG_ALERT,
2856 	       ioa_cfg->regs.clr_uproc_interrupt_reg32);
2857 
2858 	/* Signal dump data received - Clear IO debug Ack */
2859 	writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE,
2860 	       ioa_cfg->regs.clr_interrupt_reg);
2861 
2862 	/* Wait for IOA to signal LDUMP exit - IOA reset alert will be cleared */
2863 	while (delay < IPR_LDUMP_MAX_SHORT_ACK_DELAY_IN_USEC) {
2864 		temp_pcii_reg =
2865 		    readl(ioa_cfg->regs.sense_uproc_interrupt_reg32);
2866 
2867 		if (!(temp_pcii_reg & IPR_UPROCI_RESET_ALERT))
2868 			return 0;
2869 
2870 		udelay(10);
2871 		delay += 10;
2872 	}
2873 
2874 	return 0;
2875 }
2876 
2877 #ifdef CONFIG_SCSI_IPR_DUMP
2878 /**
2879  * ipr_sdt_copy - Copy Smart Dump Table to kernel buffer
2880  * @ioa_cfg:		ioa config struct
2881  * @pci_address:	adapter address
2882  * @length:			length of data to copy
2883  *
2884  * Copy data from PCI adapter to kernel buffer.
2885  * Note: length MUST be a 4 byte multiple
2886  * Return value:
2887  * 	0 on success / other on failure
2888  **/
2889 static int ipr_sdt_copy(struct ipr_ioa_cfg *ioa_cfg,
2890 			unsigned long pci_address, u32 length)
2891 {
2892 	int bytes_copied = 0;
2893 	int cur_len, rc, rem_len, rem_page_len, max_dump_size;
2894 	__be32 *page;
2895 	unsigned long lock_flags = 0;
2896 	struct ipr_ioa_dump *ioa_dump = &ioa_cfg->dump->ioa_dump;
2897 
2898 	if (ioa_cfg->sis64)
2899 		max_dump_size = IPR_FMT3_MAX_IOA_DUMP_SIZE;
2900 	else
2901 		max_dump_size = IPR_FMT2_MAX_IOA_DUMP_SIZE;
2902 
2903 	while (bytes_copied < length &&
2904 	       (ioa_dump->hdr.len + bytes_copied) < max_dump_size) {
2905 		if (ioa_dump->page_offset >= PAGE_SIZE ||
2906 		    ioa_dump->page_offset == 0) {
2907 			page = (__be32 *)__get_free_page(GFP_ATOMIC);
2908 
2909 			if (!page) {
2910 				ipr_trace;
2911 				return bytes_copied;
2912 			}
2913 
2914 			ioa_dump->page_offset = 0;
2915 			ioa_dump->ioa_data[ioa_dump->next_page_index] = page;
2916 			ioa_dump->next_page_index++;
2917 		} else
2918 			page = ioa_dump->ioa_data[ioa_dump->next_page_index - 1];
2919 
2920 		rem_len = length - bytes_copied;
2921 		rem_page_len = PAGE_SIZE - ioa_dump->page_offset;
2922 		cur_len = min(rem_len, rem_page_len);
2923 
2924 		spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
2925 		if (ioa_cfg->sdt_state == ABORT_DUMP) {
2926 			rc = -EIO;
2927 		} else {
2928 			rc = ipr_get_ldump_data_section(ioa_cfg,
2929 							pci_address + bytes_copied,
2930 							&page[ioa_dump->page_offset / 4],
2931 							(cur_len / sizeof(u32)));
2932 		}
2933 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
2934 
2935 		if (!rc) {
2936 			ioa_dump->page_offset += cur_len;
2937 			bytes_copied += cur_len;
2938 		} else {
2939 			ipr_trace;
2940 			break;
2941 		}
2942 		schedule();
2943 	}
2944 
2945 	return bytes_copied;
2946 }
2947 
2948 /**
2949  * ipr_init_dump_entry_hdr - Initialize a dump entry header.
2950  * @hdr:	dump entry header struct
2951  *
2952  * Return value:
2953  * 	nothing
2954  **/
2955 static void ipr_init_dump_entry_hdr(struct ipr_dump_entry_header *hdr)
2956 {
2957 	hdr->eye_catcher = IPR_DUMP_EYE_CATCHER;
2958 	hdr->num_elems = 1;
2959 	hdr->offset = sizeof(*hdr);
2960 	hdr->status = IPR_DUMP_STATUS_SUCCESS;
2961 }
2962 
2963 /**
2964  * ipr_dump_ioa_type_data - Fill in the adapter type in the dump.
2965  * @ioa_cfg:	ioa config struct
2966  * @driver_dump:	driver dump struct
2967  *
2968  * Return value:
2969  * 	nothing
2970  **/
2971 static void ipr_dump_ioa_type_data(struct ipr_ioa_cfg *ioa_cfg,
2972 				   struct ipr_driver_dump *driver_dump)
2973 {
2974 	struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
2975 
2976 	ipr_init_dump_entry_hdr(&driver_dump->ioa_type_entry.hdr);
2977 	driver_dump->ioa_type_entry.hdr.len =
2978 		sizeof(struct ipr_dump_ioa_type_entry) -
2979 		sizeof(struct ipr_dump_entry_header);
2980 	driver_dump->ioa_type_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
2981 	driver_dump->ioa_type_entry.hdr.id = IPR_DUMP_DRIVER_TYPE_ID;
2982 	driver_dump->ioa_type_entry.type = ioa_cfg->type;
2983 	driver_dump->ioa_type_entry.fw_version = (ucode_vpd->major_release << 24) |
2984 		(ucode_vpd->card_type << 16) | (ucode_vpd->minor_release[0] << 8) |
2985 		ucode_vpd->minor_release[1];
2986 	driver_dump->hdr.num_entries++;
2987 }
2988 
2989 /**
2990  * ipr_dump_version_data - Fill in the driver version in the dump.
2991  * @ioa_cfg:	ioa config struct
2992  * @driver_dump:	driver dump struct
2993  *
2994  * Return value:
2995  * 	nothing
2996  **/
2997 static void ipr_dump_version_data(struct ipr_ioa_cfg *ioa_cfg,
2998 				  struct ipr_driver_dump *driver_dump)
2999 {
3000 	ipr_init_dump_entry_hdr(&driver_dump->version_entry.hdr);
3001 	driver_dump->version_entry.hdr.len =
3002 		sizeof(struct ipr_dump_version_entry) -
3003 		sizeof(struct ipr_dump_entry_header);
3004 	driver_dump->version_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_ASCII;
3005 	driver_dump->version_entry.hdr.id = IPR_DUMP_DRIVER_VERSION_ID;
3006 	strcpy(driver_dump->version_entry.version, IPR_DRIVER_VERSION);
3007 	driver_dump->hdr.num_entries++;
3008 }
3009 
3010 /**
3011  * ipr_dump_trace_data - Fill in the IOA trace in the dump.
3012  * @ioa_cfg:	ioa config struct
3013  * @driver_dump:	driver dump struct
3014  *
3015  * Return value:
3016  * 	nothing
3017  **/
3018 static void ipr_dump_trace_data(struct ipr_ioa_cfg *ioa_cfg,
3019 				   struct ipr_driver_dump *driver_dump)
3020 {
3021 	ipr_init_dump_entry_hdr(&driver_dump->trace_entry.hdr);
3022 	driver_dump->trace_entry.hdr.len =
3023 		sizeof(struct ipr_dump_trace_entry) -
3024 		sizeof(struct ipr_dump_entry_header);
3025 	driver_dump->trace_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
3026 	driver_dump->trace_entry.hdr.id = IPR_DUMP_TRACE_ID;
3027 	memcpy(driver_dump->trace_entry.trace, ioa_cfg->trace, IPR_TRACE_SIZE);
3028 	driver_dump->hdr.num_entries++;
3029 }
3030 
3031 /**
3032  * ipr_dump_location_data - Fill in the IOA location in the dump.
3033  * @ioa_cfg:	ioa config struct
3034  * @driver_dump:	driver dump struct
3035  *
3036  * Return value:
3037  * 	nothing
3038  **/
3039 static void ipr_dump_location_data(struct ipr_ioa_cfg *ioa_cfg,
3040 				   struct ipr_driver_dump *driver_dump)
3041 {
3042 	ipr_init_dump_entry_hdr(&driver_dump->location_entry.hdr);
3043 	driver_dump->location_entry.hdr.len =
3044 		sizeof(struct ipr_dump_location_entry) -
3045 		sizeof(struct ipr_dump_entry_header);
3046 	driver_dump->location_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_ASCII;
3047 	driver_dump->location_entry.hdr.id = IPR_DUMP_LOCATION_ID;
3048 	strcpy(driver_dump->location_entry.location, dev_name(&ioa_cfg->pdev->dev));
3049 	driver_dump->hdr.num_entries++;
3050 }
3051 
3052 /**
3053  * ipr_get_ioa_dump - Perform a dump of the driver and adapter.
3054  * @ioa_cfg:	ioa config struct
3055  * @dump:		dump struct
3056  *
3057  * Return value:
3058  * 	nothing
3059  **/
3060 static void ipr_get_ioa_dump(struct ipr_ioa_cfg *ioa_cfg, struct ipr_dump *dump)
3061 {
3062 	unsigned long start_addr, sdt_word;
3063 	unsigned long lock_flags = 0;
3064 	struct ipr_driver_dump *driver_dump = &dump->driver_dump;
3065 	struct ipr_ioa_dump *ioa_dump = &dump->ioa_dump;
3066 	u32 num_entries, max_num_entries, start_off, end_off;
3067 	u32 max_dump_size, bytes_to_copy, bytes_copied, rc;
3068 	struct ipr_sdt *sdt;
3069 	int valid = 1;
3070 	int i;
3071 
3072 	ENTER;
3073 
3074 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3075 
3076 	if (ioa_cfg->sdt_state != READ_DUMP) {
3077 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3078 		return;
3079 	}
3080 
3081 	if (ioa_cfg->sis64) {
3082 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3083 		ssleep(IPR_DUMP_DELAY_SECONDS);
3084 		spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3085 	}
3086 
3087 	start_addr = readl(ioa_cfg->ioa_mailbox);
3088 
3089 	if (!ioa_cfg->sis64 && !ipr_sdt_is_fmt2(start_addr)) {
3090 		dev_err(&ioa_cfg->pdev->dev,
3091 			"Invalid dump table format: %lx\n", start_addr);
3092 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3093 		return;
3094 	}
3095 
3096 	dev_err(&ioa_cfg->pdev->dev, "Dump of IOA initiated\n");
3097 
3098 	driver_dump->hdr.eye_catcher = IPR_DUMP_EYE_CATCHER;
3099 
3100 	/* Initialize the overall dump header */
3101 	driver_dump->hdr.len = sizeof(struct ipr_driver_dump);
3102 	driver_dump->hdr.num_entries = 1;
3103 	driver_dump->hdr.first_entry_offset = sizeof(struct ipr_dump_header);
3104 	driver_dump->hdr.status = IPR_DUMP_STATUS_SUCCESS;
3105 	driver_dump->hdr.os = IPR_DUMP_OS_LINUX;
3106 	driver_dump->hdr.driver_name = IPR_DUMP_DRIVER_NAME;
3107 
3108 	ipr_dump_version_data(ioa_cfg, driver_dump);
3109 	ipr_dump_location_data(ioa_cfg, driver_dump);
3110 	ipr_dump_ioa_type_data(ioa_cfg, driver_dump);
3111 	ipr_dump_trace_data(ioa_cfg, driver_dump);
3112 
3113 	/* Update dump_header */
3114 	driver_dump->hdr.len += sizeof(struct ipr_dump_entry_header);
3115 
3116 	/* IOA Dump entry */
3117 	ipr_init_dump_entry_hdr(&ioa_dump->hdr);
3118 	ioa_dump->hdr.len = 0;
3119 	ioa_dump->hdr.data_type = IPR_DUMP_DATA_TYPE_BINARY;
3120 	ioa_dump->hdr.id = IPR_DUMP_IOA_DUMP_ID;
3121 
3122 	/* First entries in sdt are actually a list of dump addresses and
3123 	 lengths to gather the real dump data.  sdt represents the pointer
3124 	 to the ioa generated dump table.  Dump data will be extracted based
3125 	 on entries in this table */
3126 	sdt = &ioa_dump->sdt;
3127 
3128 	if (ioa_cfg->sis64) {
3129 		max_num_entries = IPR_FMT3_NUM_SDT_ENTRIES;
3130 		max_dump_size = IPR_FMT3_MAX_IOA_DUMP_SIZE;
3131 	} else {
3132 		max_num_entries = IPR_FMT2_NUM_SDT_ENTRIES;
3133 		max_dump_size = IPR_FMT2_MAX_IOA_DUMP_SIZE;
3134 	}
3135 
3136 	bytes_to_copy = offsetof(struct ipr_sdt, entry) +
3137 			(max_num_entries * sizeof(struct ipr_sdt_entry));
3138 	rc = ipr_get_ldump_data_section(ioa_cfg, start_addr, (__be32 *)sdt,
3139 					bytes_to_copy / sizeof(__be32));
3140 
3141 	/* Smart Dump table is ready to use and the first entry is valid */
3142 	if (rc || ((be32_to_cpu(sdt->hdr.state) != IPR_FMT3_SDT_READY_TO_USE) &&
3143 	    (be32_to_cpu(sdt->hdr.state) != IPR_FMT2_SDT_READY_TO_USE))) {
3144 		dev_err(&ioa_cfg->pdev->dev,
3145 			"Dump of IOA failed. Dump table not valid: %d, %X.\n",
3146 			rc, be32_to_cpu(sdt->hdr.state));
3147 		driver_dump->hdr.status = IPR_DUMP_STATUS_FAILED;
3148 		ioa_cfg->sdt_state = DUMP_OBTAINED;
3149 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3150 		return;
3151 	}
3152 
3153 	num_entries = be32_to_cpu(sdt->hdr.num_entries_used);
3154 
3155 	if (num_entries > max_num_entries)
3156 		num_entries = max_num_entries;
3157 
3158 	/* Update dump length to the actual data to be copied */
3159 	dump->driver_dump.hdr.len += sizeof(struct ipr_sdt_header);
3160 	if (ioa_cfg->sis64)
3161 		dump->driver_dump.hdr.len += num_entries * sizeof(struct ipr_sdt_entry);
3162 	else
3163 		dump->driver_dump.hdr.len += max_num_entries * sizeof(struct ipr_sdt_entry);
3164 
3165 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3166 
3167 	for (i = 0; i < num_entries; i++) {
3168 		if (ioa_dump->hdr.len > max_dump_size) {
3169 			driver_dump->hdr.status = IPR_DUMP_STATUS_QUAL_SUCCESS;
3170 			break;
3171 		}
3172 
3173 		if (sdt->entry[i].flags & IPR_SDT_VALID_ENTRY) {
3174 			sdt_word = be32_to_cpu(sdt->entry[i].start_token);
3175 			if (ioa_cfg->sis64)
3176 				bytes_to_copy = be32_to_cpu(sdt->entry[i].end_token);
3177 			else {
3178 				start_off = sdt_word & IPR_FMT2_MBX_ADDR_MASK;
3179 				end_off = be32_to_cpu(sdt->entry[i].end_token);
3180 
3181 				if (ipr_sdt_is_fmt2(sdt_word) && sdt_word)
3182 					bytes_to_copy = end_off - start_off;
3183 				else
3184 					valid = 0;
3185 			}
3186 			if (valid) {
3187 				if (bytes_to_copy > max_dump_size) {
3188 					sdt->entry[i].flags &= ~IPR_SDT_VALID_ENTRY;
3189 					continue;
3190 				}
3191 
3192 				/* Copy data from adapter to driver buffers */
3193 				bytes_copied = ipr_sdt_copy(ioa_cfg, sdt_word,
3194 							    bytes_to_copy);
3195 
3196 				ioa_dump->hdr.len += bytes_copied;
3197 
3198 				if (bytes_copied != bytes_to_copy) {
3199 					driver_dump->hdr.status = IPR_DUMP_STATUS_QUAL_SUCCESS;
3200 					break;
3201 				}
3202 			}
3203 		}
3204 	}
3205 
3206 	dev_err(&ioa_cfg->pdev->dev, "Dump of IOA completed.\n");
3207 
3208 	/* Update dump_header */
3209 	driver_dump->hdr.len += ioa_dump->hdr.len;
3210 	wmb();
3211 	ioa_cfg->sdt_state = DUMP_OBTAINED;
3212 	LEAVE;
3213 }
3214 
3215 #else
3216 #define ipr_get_ioa_dump(ioa_cfg, dump) do { } while (0)
3217 #endif
3218 
3219 /**
3220  * ipr_release_dump - Free adapter dump memory
3221  * @kref:	kref struct
3222  *
3223  * Return value:
3224  *	nothing
3225  **/
3226 static void ipr_release_dump(struct kref *kref)
3227 {
3228 	struct ipr_dump *dump = container_of(kref, struct ipr_dump, kref);
3229 	struct ipr_ioa_cfg *ioa_cfg = dump->ioa_cfg;
3230 	unsigned long lock_flags = 0;
3231 	int i;
3232 
3233 	ENTER;
3234 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3235 	ioa_cfg->dump = NULL;
3236 	ioa_cfg->sdt_state = INACTIVE;
3237 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3238 
3239 	for (i = 0; i < dump->ioa_dump.next_page_index; i++)
3240 		free_page((unsigned long) dump->ioa_dump.ioa_data[i]);
3241 
3242 	vfree(dump->ioa_dump.ioa_data);
3243 	kfree(dump);
3244 	LEAVE;
3245 }
3246 
3247 /**
3248  * ipr_worker_thread - Worker thread
3249  * @work:		ioa config struct
3250  *
3251  * Called at task level from a work thread. This function takes care
3252  * of adding and removing device from the mid-layer as configuration
3253  * changes are detected by the adapter.
3254  *
3255  * Return value:
3256  * 	nothing
3257  **/
3258 static void ipr_worker_thread(struct work_struct *work)
3259 {
3260 	unsigned long lock_flags;
3261 	struct ipr_resource_entry *res;
3262 	struct scsi_device *sdev;
3263 	struct ipr_dump *dump;
3264 	struct ipr_ioa_cfg *ioa_cfg =
3265 		container_of(work, struct ipr_ioa_cfg, work_q);
3266 	u8 bus, target, lun;
3267 	int did_work;
3268 
3269 	ENTER;
3270 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3271 
3272 	if (ioa_cfg->sdt_state == READ_DUMP) {
3273 		dump = ioa_cfg->dump;
3274 		if (!dump) {
3275 			spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3276 			return;
3277 		}
3278 		kref_get(&dump->kref);
3279 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3280 		ipr_get_ioa_dump(ioa_cfg, dump);
3281 		kref_put(&dump->kref, ipr_release_dump);
3282 
3283 		spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3284 		if (ioa_cfg->sdt_state == DUMP_OBTAINED && !ioa_cfg->dump_timeout)
3285 			ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
3286 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3287 		return;
3288 	}
3289 
3290 restart:
3291 	do {
3292 		did_work = 0;
3293 		if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds) {
3294 			spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3295 			return;
3296 		}
3297 
3298 		list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
3299 			if (res->del_from_ml && res->sdev) {
3300 				did_work = 1;
3301 				sdev = res->sdev;
3302 				if (!scsi_device_get(sdev)) {
3303 					if (!res->add_to_ml)
3304 						list_move_tail(&res->queue, &ioa_cfg->free_res_q);
3305 					else
3306 						res->del_from_ml = 0;
3307 					spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3308 					scsi_remove_device(sdev);
3309 					scsi_device_put(sdev);
3310 					spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3311 				}
3312 				break;
3313 			}
3314 		}
3315 	} while (did_work);
3316 
3317 	list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
3318 		if (res->add_to_ml) {
3319 			bus = res->bus;
3320 			target = res->target;
3321 			lun = res->lun;
3322 			res->add_to_ml = 0;
3323 			spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3324 			scsi_add_device(ioa_cfg->host, bus, target, lun);
3325 			spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3326 			goto restart;
3327 		}
3328 	}
3329 
3330 	ioa_cfg->scan_done = 1;
3331 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3332 	kobject_uevent(&ioa_cfg->host->shost_dev.kobj, KOBJ_CHANGE);
3333 	LEAVE;
3334 }
3335 
3336 #ifdef CONFIG_SCSI_IPR_TRACE
3337 /**
3338  * ipr_read_trace - Dump the adapter trace
3339  * @filp:		open sysfs file
3340  * @kobj:		kobject struct
3341  * @bin_attr:		bin_attribute struct
3342  * @buf:		buffer
3343  * @off:		offset
3344  * @count:		buffer size
3345  *
3346  * Return value:
3347  *	number of bytes printed to buffer
3348  **/
3349 static ssize_t ipr_read_trace(struct file *filp, struct kobject *kobj,
3350 			      struct bin_attribute *bin_attr,
3351 			      char *buf, loff_t off, size_t count)
3352 {
3353 	struct device *dev = container_of(kobj, struct device, kobj);
3354 	struct Scsi_Host *shost = class_to_shost(dev);
3355 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3356 	unsigned long lock_flags = 0;
3357 	ssize_t ret;
3358 
3359 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3360 	ret = memory_read_from_buffer(buf, count, &off, ioa_cfg->trace,
3361 				IPR_TRACE_SIZE);
3362 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3363 
3364 	return ret;
3365 }
3366 
3367 static struct bin_attribute ipr_trace_attr = {
3368 	.attr =	{
3369 		.name = "trace",
3370 		.mode = S_IRUGO,
3371 	},
3372 	.size = 0,
3373 	.read = ipr_read_trace,
3374 };
3375 #endif
3376 
3377 /**
3378  * ipr_show_fw_version - Show the firmware version
3379  * @dev:	class device struct
3380  * @buf:	buffer
3381  *
3382  * Return value:
3383  *	number of bytes printed to buffer
3384  **/
3385 static ssize_t ipr_show_fw_version(struct device *dev,
3386 				   struct device_attribute *attr, char *buf)
3387 {
3388 	struct Scsi_Host *shost = class_to_shost(dev);
3389 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3390 	struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
3391 	unsigned long lock_flags = 0;
3392 	int len;
3393 
3394 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3395 	len = snprintf(buf, PAGE_SIZE, "%02X%02X%02X%02X\n",
3396 		       ucode_vpd->major_release, ucode_vpd->card_type,
3397 		       ucode_vpd->minor_release[0],
3398 		       ucode_vpd->minor_release[1]);
3399 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3400 	return len;
3401 }
3402 
3403 static struct device_attribute ipr_fw_version_attr = {
3404 	.attr = {
3405 		.name =		"fw_version",
3406 		.mode =		S_IRUGO,
3407 	},
3408 	.show = ipr_show_fw_version,
3409 };
3410 
3411 /**
3412  * ipr_show_log_level - Show the adapter's error logging level
3413  * @dev:	class device struct
3414  * @buf:	buffer
3415  *
3416  * Return value:
3417  * 	number of bytes printed to buffer
3418  **/
3419 static ssize_t ipr_show_log_level(struct device *dev,
3420 				   struct device_attribute *attr, char *buf)
3421 {
3422 	struct Scsi_Host *shost = class_to_shost(dev);
3423 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3424 	unsigned long lock_flags = 0;
3425 	int len;
3426 
3427 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3428 	len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->log_level);
3429 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3430 	return len;
3431 }
3432 
3433 /**
3434  * ipr_store_log_level - Change the adapter's error logging level
3435  * @dev:	class device struct
3436  * @buf:	buffer
3437  *
3438  * Return value:
3439  * 	number of bytes printed to buffer
3440  **/
3441 static ssize_t ipr_store_log_level(struct device *dev,
3442 				   struct device_attribute *attr,
3443 				   const char *buf, size_t count)
3444 {
3445 	struct Scsi_Host *shost = class_to_shost(dev);
3446 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3447 	unsigned long lock_flags = 0;
3448 
3449 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3450 	ioa_cfg->log_level = simple_strtoul(buf, NULL, 10);
3451 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3452 	return strlen(buf);
3453 }
3454 
3455 static struct device_attribute ipr_log_level_attr = {
3456 	.attr = {
3457 		.name =		"log_level",
3458 		.mode =		S_IRUGO | S_IWUSR,
3459 	},
3460 	.show = ipr_show_log_level,
3461 	.store = ipr_store_log_level
3462 };
3463 
3464 /**
3465  * ipr_store_diagnostics - IOA Diagnostics interface
3466  * @dev:	device struct
3467  * @buf:	buffer
3468  * @count:	buffer size
3469  *
3470  * This function will reset the adapter and wait a reasonable
3471  * amount of time for any errors that the adapter might log.
3472  *
3473  * Return value:
3474  * 	count on success / other on failure
3475  **/
3476 static ssize_t ipr_store_diagnostics(struct device *dev,
3477 				     struct device_attribute *attr,
3478 				     const char *buf, size_t count)
3479 {
3480 	struct Scsi_Host *shost = class_to_shost(dev);
3481 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3482 	unsigned long lock_flags = 0;
3483 	int rc = count;
3484 
3485 	if (!capable(CAP_SYS_ADMIN))
3486 		return -EACCES;
3487 
3488 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3489 	while (ioa_cfg->in_reset_reload) {
3490 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3491 		wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3492 		spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3493 	}
3494 
3495 	ioa_cfg->errors_logged = 0;
3496 	ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3497 
3498 	if (ioa_cfg->in_reset_reload) {
3499 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3500 		wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3501 
3502 		/* Wait for a second for any errors to be logged */
3503 		msleep(1000);
3504 	} else {
3505 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3506 		return -EIO;
3507 	}
3508 
3509 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3510 	if (ioa_cfg->in_reset_reload || ioa_cfg->errors_logged)
3511 		rc = -EIO;
3512 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3513 
3514 	return rc;
3515 }
3516 
3517 static struct device_attribute ipr_diagnostics_attr = {
3518 	.attr = {
3519 		.name =		"run_diagnostics",
3520 		.mode =		S_IWUSR,
3521 	},
3522 	.store = ipr_store_diagnostics
3523 };
3524 
3525 /**
3526  * ipr_show_adapter_state - Show the adapter's state
3527  * @class_dev:	device struct
3528  * @buf:	buffer
3529  *
3530  * Return value:
3531  * 	number of bytes printed to buffer
3532  **/
3533 static ssize_t ipr_show_adapter_state(struct device *dev,
3534 				      struct device_attribute *attr, char *buf)
3535 {
3536 	struct Scsi_Host *shost = class_to_shost(dev);
3537 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3538 	unsigned long lock_flags = 0;
3539 	int len;
3540 
3541 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3542 	if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
3543 		len = snprintf(buf, PAGE_SIZE, "offline\n");
3544 	else
3545 		len = snprintf(buf, PAGE_SIZE, "online\n");
3546 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3547 	return len;
3548 }
3549 
3550 /**
3551  * ipr_store_adapter_state - Change adapter state
3552  * @dev:	device struct
3553  * @buf:	buffer
3554  * @count:	buffer size
3555  *
3556  * This function will change the adapter's state.
3557  *
3558  * Return value:
3559  * 	count on success / other on failure
3560  **/
3561 static ssize_t ipr_store_adapter_state(struct device *dev,
3562 				       struct device_attribute *attr,
3563 				       const char *buf, size_t count)
3564 {
3565 	struct Scsi_Host *shost = class_to_shost(dev);
3566 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3567 	unsigned long lock_flags;
3568 	int result = count, i;
3569 
3570 	if (!capable(CAP_SYS_ADMIN))
3571 		return -EACCES;
3572 
3573 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3574 	if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead &&
3575 	    !strncmp(buf, "online", 6)) {
3576 		for (i = 0; i < ioa_cfg->hrrq_num; i++) {
3577 			spin_lock(&ioa_cfg->hrrq[i]._lock);
3578 			ioa_cfg->hrrq[i].ioa_is_dead = 0;
3579 			spin_unlock(&ioa_cfg->hrrq[i]._lock);
3580 		}
3581 		wmb();
3582 		ioa_cfg->reset_retries = 0;
3583 		ioa_cfg->in_ioa_bringdown = 0;
3584 		ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
3585 	}
3586 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3587 	wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3588 
3589 	return result;
3590 }
3591 
3592 static struct device_attribute ipr_ioa_state_attr = {
3593 	.attr = {
3594 		.name =		"online_state",
3595 		.mode =		S_IRUGO | S_IWUSR,
3596 	},
3597 	.show = ipr_show_adapter_state,
3598 	.store = ipr_store_adapter_state
3599 };
3600 
3601 /**
3602  * ipr_store_reset_adapter - Reset the adapter
3603  * @dev:	device struct
3604  * @buf:	buffer
3605  * @count:	buffer size
3606  *
3607  * This function will reset the adapter.
3608  *
3609  * Return value:
3610  * 	count on success / other on failure
3611  **/
3612 static ssize_t ipr_store_reset_adapter(struct device *dev,
3613 				       struct device_attribute *attr,
3614 				       const char *buf, size_t count)
3615 {
3616 	struct Scsi_Host *shost = class_to_shost(dev);
3617 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3618 	unsigned long lock_flags;
3619 	int result = count;
3620 
3621 	if (!capable(CAP_SYS_ADMIN))
3622 		return -EACCES;
3623 
3624 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3625 	if (!ioa_cfg->in_reset_reload)
3626 		ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3627 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3628 	wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3629 
3630 	return result;
3631 }
3632 
3633 static struct device_attribute ipr_ioa_reset_attr = {
3634 	.attr = {
3635 		.name =		"reset_host",
3636 		.mode =		S_IWUSR,
3637 	},
3638 	.store = ipr_store_reset_adapter
3639 };
3640 
3641 static int ipr_iopoll(struct blk_iopoll *iop, int budget);
3642  /**
3643  * ipr_show_iopoll_weight - Show ipr polling mode
3644  * @dev:	class device struct
3645  * @buf:	buffer
3646  *
3647  * Return value:
3648  *	number of bytes printed to buffer
3649  **/
3650 static ssize_t ipr_show_iopoll_weight(struct device *dev,
3651 				   struct device_attribute *attr, char *buf)
3652 {
3653 	struct Scsi_Host *shost = class_to_shost(dev);
3654 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3655 	unsigned long lock_flags = 0;
3656 	int len;
3657 
3658 	spin_lock_irqsave(shost->host_lock, lock_flags);
3659 	len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->iopoll_weight);
3660 	spin_unlock_irqrestore(shost->host_lock, lock_flags);
3661 
3662 	return len;
3663 }
3664 
3665 /**
3666  * ipr_store_iopoll_weight - Change the adapter's polling mode
3667  * @dev:	class device struct
3668  * @buf:	buffer
3669  *
3670  * Return value:
3671  *	number of bytes printed to buffer
3672  **/
3673 static ssize_t ipr_store_iopoll_weight(struct device *dev,
3674 					struct device_attribute *attr,
3675 					const char *buf, size_t count)
3676 {
3677 	struct Scsi_Host *shost = class_to_shost(dev);
3678 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
3679 	unsigned long user_iopoll_weight;
3680 	unsigned long lock_flags = 0;
3681 	int i;
3682 
3683 	if (!ioa_cfg->sis64) {
3684 		dev_info(&ioa_cfg->pdev->dev, "blk-iopoll not supported on this adapter\n");
3685 		return -EINVAL;
3686 	}
3687 	if (kstrtoul(buf, 10, &user_iopoll_weight))
3688 		return -EINVAL;
3689 
3690 	if (user_iopoll_weight > 256) {
3691 		dev_info(&ioa_cfg->pdev->dev, "Invalid blk-iopoll weight. It must be less than 256\n");
3692 		return -EINVAL;
3693 	}
3694 
3695 	if (user_iopoll_weight == ioa_cfg->iopoll_weight) {
3696 		dev_info(&ioa_cfg->pdev->dev, "Current blk-iopoll weight has the same weight\n");
3697 		return strlen(buf);
3698 	}
3699 
3700 	if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
3701 		for (i = 1; i < ioa_cfg->hrrq_num; i++)
3702 			blk_iopoll_disable(&ioa_cfg->hrrq[i].iopoll);
3703 	}
3704 
3705 	spin_lock_irqsave(shost->host_lock, lock_flags);
3706 	ioa_cfg->iopoll_weight = user_iopoll_weight;
3707 	if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
3708 		for (i = 1; i < ioa_cfg->hrrq_num; i++) {
3709 			blk_iopoll_init(&ioa_cfg->hrrq[i].iopoll,
3710 					ioa_cfg->iopoll_weight, ipr_iopoll);
3711 			blk_iopoll_enable(&ioa_cfg->hrrq[i].iopoll);
3712 		}
3713 	}
3714 	spin_unlock_irqrestore(shost->host_lock, lock_flags);
3715 
3716 	return strlen(buf);
3717 }
3718 
3719 static struct device_attribute ipr_iopoll_weight_attr = {
3720 	.attr = {
3721 		.name =		"iopoll_weight",
3722 		.mode =		S_IRUGO | S_IWUSR,
3723 	},
3724 	.show = ipr_show_iopoll_weight,
3725 	.store = ipr_store_iopoll_weight
3726 };
3727 
3728 /**
3729  * ipr_alloc_ucode_buffer - Allocates a microcode download buffer
3730  * @buf_len:		buffer length
3731  *
3732  * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3733  * list to use for microcode download
3734  *
3735  * Return value:
3736  * 	pointer to sglist / NULL on failure
3737  **/
3738 static struct ipr_sglist *ipr_alloc_ucode_buffer(int buf_len)
3739 {
3740 	int sg_size, order, bsize_elem, num_elem, i, j;
3741 	struct ipr_sglist *sglist;
3742 	struct scatterlist *scatterlist;
3743 	struct page *page;
3744 
3745 	/* Get the minimum size per scatter/gather element */
3746 	sg_size = buf_len / (IPR_MAX_SGLIST - 1);
3747 
3748 	/* Get the actual size per element */
3749 	order = get_order(sg_size);
3750 
3751 	/* Determine the actual number of bytes per element */
3752 	bsize_elem = PAGE_SIZE * (1 << order);
3753 
3754 	/* Determine the actual number of sg entries needed */
3755 	if (buf_len % bsize_elem)
3756 		num_elem = (buf_len / bsize_elem) + 1;
3757 	else
3758 		num_elem = buf_len / bsize_elem;
3759 
3760 	/* Allocate a scatter/gather list for the DMA */
3761 	sglist = kzalloc(sizeof(struct ipr_sglist) +
3762 			 (sizeof(struct scatterlist) * (num_elem - 1)),
3763 			 GFP_KERNEL);
3764 
3765 	if (sglist == NULL) {
3766 		ipr_trace;
3767 		return NULL;
3768 	}
3769 
3770 	scatterlist = sglist->scatterlist;
3771 	sg_init_table(scatterlist, num_elem);
3772 
3773 	sglist->order = order;
3774 	sglist->num_sg = num_elem;
3775 
3776 	/* Allocate a bunch of sg elements */
3777 	for (i = 0; i < num_elem; i++) {
3778 		page = alloc_pages(GFP_KERNEL, order);
3779 		if (!page) {
3780 			ipr_trace;
3781 
3782 			/* Free up what we already allocated */
3783 			for (j = i - 1; j >= 0; j--)
3784 				__free_pages(sg_page(&scatterlist[j]), order);
3785 			kfree(sglist);
3786 			return NULL;
3787 		}
3788 
3789 		sg_set_page(&scatterlist[i], page, 0, 0);
3790 	}
3791 
3792 	return sglist;
3793 }
3794 
3795 /**
3796  * ipr_free_ucode_buffer - Frees a microcode download buffer
3797  * @p_dnld:		scatter/gather list pointer
3798  *
3799  * Free a DMA'able ucode download buffer previously allocated with
3800  * ipr_alloc_ucode_buffer
3801  *
3802  * Return value:
3803  * 	nothing
3804  **/
3805 static void ipr_free_ucode_buffer(struct ipr_sglist *sglist)
3806 {
3807 	int i;
3808 
3809 	for (i = 0; i < sglist->num_sg; i++)
3810 		__free_pages(sg_page(&sglist->scatterlist[i]), sglist->order);
3811 
3812 	kfree(sglist);
3813 }
3814 
3815 /**
3816  * ipr_copy_ucode_buffer - Copy user buffer to kernel buffer
3817  * @sglist:		scatter/gather list pointer
3818  * @buffer:		buffer pointer
3819  * @len:		buffer length
3820  *
3821  * Copy a microcode image from a user buffer into a buffer allocated by
3822  * ipr_alloc_ucode_buffer
3823  *
3824  * Return value:
3825  * 	0 on success / other on failure
3826  **/
3827 static int ipr_copy_ucode_buffer(struct ipr_sglist *sglist,
3828 				 u8 *buffer, u32 len)
3829 {
3830 	int bsize_elem, i, result = 0;
3831 	struct scatterlist *scatterlist;
3832 	void *kaddr;
3833 
3834 	/* Determine the actual number of bytes per element */
3835 	bsize_elem = PAGE_SIZE * (1 << sglist->order);
3836 
3837 	scatterlist = sglist->scatterlist;
3838 
3839 	for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
3840 		struct page *page = sg_page(&scatterlist[i]);
3841 
3842 		kaddr = kmap(page);
3843 		memcpy(kaddr, buffer, bsize_elem);
3844 		kunmap(page);
3845 
3846 		scatterlist[i].length = bsize_elem;
3847 
3848 		if (result != 0) {
3849 			ipr_trace;
3850 			return result;
3851 		}
3852 	}
3853 
3854 	if (len % bsize_elem) {
3855 		struct page *page = sg_page(&scatterlist[i]);
3856 
3857 		kaddr = kmap(page);
3858 		memcpy(kaddr, buffer, len % bsize_elem);
3859 		kunmap(page);
3860 
3861 		scatterlist[i].length = len % bsize_elem;
3862 	}
3863 
3864 	sglist->buffer_len = len;
3865 	return result;
3866 }
3867 
3868 /**
3869  * ipr_build_ucode_ioadl64 - Build a microcode download IOADL
3870  * @ipr_cmd:		ipr command struct
3871  * @sglist:		scatter/gather list
3872  *
3873  * Builds a microcode download IOA data list (IOADL).
3874  *
3875  **/
3876 static void ipr_build_ucode_ioadl64(struct ipr_cmnd *ipr_cmd,
3877 				    struct ipr_sglist *sglist)
3878 {
3879 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
3880 	struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ioadl64;
3881 	struct scatterlist *scatterlist = sglist->scatterlist;
3882 	int i;
3883 
3884 	ipr_cmd->dma_use_sg = sglist->num_dma_sg;
3885 	ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
3886 	ioarcb->data_transfer_length = cpu_to_be32(sglist->buffer_len);
3887 
3888 	ioarcb->ioadl_len =
3889 		cpu_to_be32(sizeof(struct ipr_ioadl64_desc) * ipr_cmd->dma_use_sg);
3890 	for (i = 0; i < ipr_cmd->dma_use_sg; i++) {
3891 		ioadl64[i].flags = cpu_to_be32(IPR_IOADL_FLAGS_WRITE);
3892 		ioadl64[i].data_len = cpu_to_be32(sg_dma_len(&scatterlist[i]));
3893 		ioadl64[i].address = cpu_to_be64(sg_dma_address(&scatterlist[i]));
3894 	}
3895 
3896 	ioadl64[i-1].flags |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
3897 }
3898 
3899 /**
3900  * ipr_build_ucode_ioadl - Build a microcode download IOADL
3901  * @ipr_cmd:	ipr command struct
3902  * @sglist:		scatter/gather list
3903  *
3904  * Builds a microcode download IOA data list (IOADL).
3905  *
3906  **/
3907 static void ipr_build_ucode_ioadl(struct ipr_cmnd *ipr_cmd,
3908 				  struct ipr_sglist *sglist)
3909 {
3910 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
3911 	struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
3912 	struct scatterlist *scatterlist = sglist->scatterlist;
3913 	int i;
3914 
3915 	ipr_cmd->dma_use_sg = sglist->num_dma_sg;
3916 	ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
3917 	ioarcb->data_transfer_length = cpu_to_be32(sglist->buffer_len);
3918 
3919 	ioarcb->ioadl_len =
3920 		cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
3921 
3922 	for (i = 0; i < ipr_cmd->dma_use_sg; i++) {
3923 		ioadl[i].flags_and_data_len =
3924 			cpu_to_be32(IPR_IOADL_FLAGS_WRITE | sg_dma_len(&scatterlist[i]));
3925 		ioadl[i].address =
3926 			cpu_to_be32(sg_dma_address(&scatterlist[i]));
3927 	}
3928 
3929 	ioadl[i-1].flags_and_data_len |=
3930 		cpu_to_be32(IPR_IOADL_FLAGS_LAST);
3931 }
3932 
3933 /**
3934  * ipr_update_ioa_ucode - Update IOA's microcode
3935  * @ioa_cfg:	ioa config struct
3936  * @sglist:		scatter/gather list
3937  *
3938  * Initiate an adapter reset to update the IOA's microcode
3939  *
3940  * Return value:
3941  * 	0 on success / -EIO on failure
3942  **/
3943 static int ipr_update_ioa_ucode(struct ipr_ioa_cfg *ioa_cfg,
3944 				struct ipr_sglist *sglist)
3945 {
3946 	unsigned long lock_flags;
3947 
3948 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3949 	while (ioa_cfg->in_reset_reload) {
3950 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3951 		wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3952 		spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3953 	}
3954 
3955 	if (ioa_cfg->ucode_sglist) {
3956 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3957 		dev_err(&ioa_cfg->pdev->dev,
3958 			"Microcode download already in progress\n");
3959 		return -EIO;
3960 	}
3961 
3962 	sglist->num_dma_sg = dma_map_sg(&ioa_cfg->pdev->dev,
3963 					sglist->scatterlist, sglist->num_sg,
3964 					DMA_TO_DEVICE);
3965 
3966 	if (!sglist->num_dma_sg) {
3967 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3968 		dev_err(&ioa_cfg->pdev->dev,
3969 			"Failed to map microcode download buffer!\n");
3970 		return -EIO;
3971 	}
3972 
3973 	ioa_cfg->ucode_sglist = sglist;
3974 	ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
3975 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3976 	wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
3977 
3978 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
3979 	ioa_cfg->ucode_sglist = NULL;
3980 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
3981 	return 0;
3982 }
3983 
3984 /**
3985  * ipr_store_update_fw - Update the firmware on the adapter
3986  * @class_dev:	device struct
3987  * @buf:	buffer
3988  * @count:	buffer size
3989  *
3990  * This function will update the firmware on the adapter.
3991  *
3992  * Return value:
3993  * 	count on success / other on failure
3994  **/
3995 static ssize_t ipr_store_update_fw(struct device *dev,
3996 				   struct device_attribute *attr,
3997 				   const char *buf, size_t count)
3998 {
3999 	struct Scsi_Host *shost = class_to_shost(dev);
4000 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4001 	struct ipr_ucode_image_header *image_hdr;
4002 	const struct firmware *fw_entry;
4003 	struct ipr_sglist *sglist;
4004 	char fname[100];
4005 	char *src;
4006 	int len, result, dnld_size;
4007 
4008 	if (!capable(CAP_SYS_ADMIN))
4009 		return -EACCES;
4010 
4011 	len = snprintf(fname, 99, "%s", buf);
4012 	fname[len-1] = '\0';
4013 
4014 	if (request_firmware(&fw_entry, fname, &ioa_cfg->pdev->dev)) {
4015 		dev_err(&ioa_cfg->pdev->dev, "Firmware file %s not found\n", fname);
4016 		return -EIO;
4017 	}
4018 
4019 	image_hdr = (struct ipr_ucode_image_header *)fw_entry->data;
4020 
4021 	src = (u8 *)image_hdr + be32_to_cpu(image_hdr->header_length);
4022 	dnld_size = fw_entry->size - be32_to_cpu(image_hdr->header_length);
4023 	sglist = ipr_alloc_ucode_buffer(dnld_size);
4024 
4025 	if (!sglist) {
4026 		dev_err(&ioa_cfg->pdev->dev, "Microcode buffer allocation failed\n");
4027 		release_firmware(fw_entry);
4028 		return -ENOMEM;
4029 	}
4030 
4031 	result = ipr_copy_ucode_buffer(sglist, src, dnld_size);
4032 
4033 	if (result) {
4034 		dev_err(&ioa_cfg->pdev->dev,
4035 			"Microcode buffer copy to DMA buffer failed\n");
4036 		goto out;
4037 	}
4038 
4039 	ipr_info("Updating microcode, please be patient.  This may take up to 30 minutes.\n");
4040 
4041 	result = ipr_update_ioa_ucode(ioa_cfg, sglist);
4042 
4043 	if (!result)
4044 		result = count;
4045 out:
4046 	ipr_free_ucode_buffer(sglist);
4047 	release_firmware(fw_entry);
4048 	return result;
4049 }
4050 
4051 static struct device_attribute ipr_update_fw_attr = {
4052 	.attr = {
4053 		.name =		"update_fw",
4054 		.mode =		S_IWUSR,
4055 	},
4056 	.store = ipr_store_update_fw
4057 };
4058 
4059 /**
4060  * ipr_show_fw_type - Show the adapter's firmware type.
4061  * @dev:	class device struct
4062  * @buf:	buffer
4063  *
4064  * Return value:
4065  *	number of bytes printed to buffer
4066  **/
4067 static ssize_t ipr_show_fw_type(struct device *dev,
4068 				struct device_attribute *attr, char *buf)
4069 {
4070 	struct Scsi_Host *shost = class_to_shost(dev);
4071 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4072 	unsigned long lock_flags = 0;
4073 	int len;
4074 
4075 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4076 	len = snprintf(buf, PAGE_SIZE, "%d\n", ioa_cfg->sis64);
4077 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4078 	return len;
4079 }
4080 
4081 static struct device_attribute ipr_ioa_fw_type_attr = {
4082 	.attr = {
4083 		.name =		"fw_type",
4084 		.mode =		S_IRUGO,
4085 	},
4086 	.show = ipr_show_fw_type
4087 };
4088 
4089 static struct device_attribute *ipr_ioa_attrs[] = {
4090 	&ipr_fw_version_attr,
4091 	&ipr_log_level_attr,
4092 	&ipr_diagnostics_attr,
4093 	&ipr_ioa_state_attr,
4094 	&ipr_ioa_reset_attr,
4095 	&ipr_update_fw_attr,
4096 	&ipr_ioa_fw_type_attr,
4097 	&ipr_iopoll_weight_attr,
4098 	NULL,
4099 };
4100 
4101 #ifdef CONFIG_SCSI_IPR_DUMP
4102 /**
4103  * ipr_read_dump - Dump the adapter
4104  * @filp:		open sysfs file
4105  * @kobj:		kobject struct
4106  * @bin_attr:		bin_attribute struct
4107  * @buf:		buffer
4108  * @off:		offset
4109  * @count:		buffer size
4110  *
4111  * Return value:
4112  *	number of bytes printed to buffer
4113  **/
4114 static ssize_t ipr_read_dump(struct file *filp, struct kobject *kobj,
4115 			     struct bin_attribute *bin_attr,
4116 			     char *buf, loff_t off, size_t count)
4117 {
4118 	struct device *cdev = container_of(kobj, struct device, kobj);
4119 	struct Scsi_Host *shost = class_to_shost(cdev);
4120 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4121 	struct ipr_dump *dump;
4122 	unsigned long lock_flags = 0;
4123 	char *src;
4124 	int len, sdt_end;
4125 	size_t rc = count;
4126 
4127 	if (!capable(CAP_SYS_ADMIN))
4128 		return -EACCES;
4129 
4130 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4131 	dump = ioa_cfg->dump;
4132 
4133 	if (ioa_cfg->sdt_state != DUMP_OBTAINED || !dump) {
4134 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4135 		return 0;
4136 	}
4137 	kref_get(&dump->kref);
4138 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4139 
4140 	if (off > dump->driver_dump.hdr.len) {
4141 		kref_put(&dump->kref, ipr_release_dump);
4142 		return 0;
4143 	}
4144 
4145 	if (off + count > dump->driver_dump.hdr.len) {
4146 		count = dump->driver_dump.hdr.len - off;
4147 		rc = count;
4148 	}
4149 
4150 	if (count && off < sizeof(dump->driver_dump)) {
4151 		if (off + count > sizeof(dump->driver_dump))
4152 			len = sizeof(dump->driver_dump) - off;
4153 		else
4154 			len = count;
4155 		src = (u8 *)&dump->driver_dump + off;
4156 		memcpy(buf, src, len);
4157 		buf += len;
4158 		off += len;
4159 		count -= len;
4160 	}
4161 
4162 	off -= sizeof(dump->driver_dump);
4163 
4164 	if (ioa_cfg->sis64)
4165 		sdt_end = offsetof(struct ipr_ioa_dump, sdt.entry) +
4166 			  (be32_to_cpu(dump->ioa_dump.sdt.hdr.num_entries_used) *
4167 			   sizeof(struct ipr_sdt_entry));
4168 	else
4169 		sdt_end = offsetof(struct ipr_ioa_dump, sdt.entry) +
4170 			  (IPR_FMT2_NUM_SDT_ENTRIES * sizeof(struct ipr_sdt_entry));
4171 
4172 	if (count && off < sdt_end) {
4173 		if (off + count > sdt_end)
4174 			len = sdt_end - off;
4175 		else
4176 			len = count;
4177 		src = (u8 *)&dump->ioa_dump + off;
4178 		memcpy(buf, src, len);
4179 		buf += len;
4180 		off += len;
4181 		count -= len;
4182 	}
4183 
4184 	off -= sdt_end;
4185 
4186 	while (count) {
4187 		if ((off & PAGE_MASK) != ((off + count) & PAGE_MASK))
4188 			len = PAGE_ALIGN(off) - off;
4189 		else
4190 			len = count;
4191 		src = (u8 *)dump->ioa_dump.ioa_data[(off & PAGE_MASK) >> PAGE_SHIFT];
4192 		src += off & ~PAGE_MASK;
4193 		memcpy(buf, src, len);
4194 		buf += len;
4195 		off += len;
4196 		count -= len;
4197 	}
4198 
4199 	kref_put(&dump->kref, ipr_release_dump);
4200 	return rc;
4201 }
4202 
4203 /**
4204  * ipr_alloc_dump - Prepare for adapter dump
4205  * @ioa_cfg:	ioa config struct
4206  *
4207  * Return value:
4208  *	0 on success / other on failure
4209  **/
4210 static int ipr_alloc_dump(struct ipr_ioa_cfg *ioa_cfg)
4211 {
4212 	struct ipr_dump *dump;
4213 	__be32 **ioa_data;
4214 	unsigned long lock_flags = 0;
4215 
4216 	dump = kzalloc(sizeof(struct ipr_dump), GFP_KERNEL);
4217 
4218 	if (!dump) {
4219 		ipr_err("Dump memory allocation failed\n");
4220 		return -ENOMEM;
4221 	}
4222 
4223 	if (ioa_cfg->sis64)
4224 		ioa_data = vmalloc(IPR_FMT3_MAX_NUM_DUMP_PAGES * sizeof(__be32 *));
4225 	else
4226 		ioa_data = vmalloc(IPR_FMT2_MAX_NUM_DUMP_PAGES * sizeof(__be32 *));
4227 
4228 	if (!ioa_data) {
4229 		ipr_err("Dump memory allocation failed\n");
4230 		kfree(dump);
4231 		return -ENOMEM;
4232 	}
4233 
4234 	dump->ioa_dump.ioa_data = ioa_data;
4235 
4236 	kref_init(&dump->kref);
4237 	dump->ioa_cfg = ioa_cfg;
4238 
4239 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4240 
4241 	if (INACTIVE != ioa_cfg->sdt_state) {
4242 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4243 		vfree(dump->ioa_dump.ioa_data);
4244 		kfree(dump);
4245 		return 0;
4246 	}
4247 
4248 	ioa_cfg->dump = dump;
4249 	ioa_cfg->sdt_state = WAIT_FOR_DUMP;
4250 	if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead && !ioa_cfg->dump_taken) {
4251 		ioa_cfg->dump_taken = 1;
4252 		schedule_work(&ioa_cfg->work_q);
4253 	}
4254 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4255 
4256 	return 0;
4257 }
4258 
4259 /**
4260  * ipr_free_dump - Free adapter dump memory
4261  * @ioa_cfg:	ioa config struct
4262  *
4263  * Return value:
4264  *	0 on success / other on failure
4265  **/
4266 static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg)
4267 {
4268 	struct ipr_dump *dump;
4269 	unsigned long lock_flags = 0;
4270 
4271 	ENTER;
4272 
4273 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4274 	dump = ioa_cfg->dump;
4275 	if (!dump) {
4276 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4277 		return 0;
4278 	}
4279 
4280 	ioa_cfg->dump = NULL;
4281 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4282 
4283 	kref_put(&dump->kref, ipr_release_dump);
4284 
4285 	LEAVE;
4286 	return 0;
4287 }
4288 
4289 /**
4290  * ipr_write_dump - Setup dump state of adapter
4291  * @filp:		open sysfs file
4292  * @kobj:		kobject struct
4293  * @bin_attr:		bin_attribute struct
4294  * @buf:		buffer
4295  * @off:		offset
4296  * @count:		buffer size
4297  *
4298  * Return value:
4299  *	number of bytes printed to buffer
4300  **/
4301 static ssize_t ipr_write_dump(struct file *filp, struct kobject *kobj,
4302 			      struct bin_attribute *bin_attr,
4303 			      char *buf, loff_t off, size_t count)
4304 {
4305 	struct device *cdev = container_of(kobj, struct device, kobj);
4306 	struct Scsi_Host *shost = class_to_shost(cdev);
4307 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
4308 	int rc;
4309 
4310 	if (!capable(CAP_SYS_ADMIN))
4311 		return -EACCES;
4312 
4313 	if (buf[0] == '1')
4314 		rc = ipr_alloc_dump(ioa_cfg);
4315 	else if (buf[0] == '0')
4316 		rc = ipr_free_dump(ioa_cfg);
4317 	else
4318 		return -EINVAL;
4319 
4320 	if (rc)
4321 		return rc;
4322 	else
4323 		return count;
4324 }
4325 
4326 static struct bin_attribute ipr_dump_attr = {
4327 	.attr =	{
4328 		.name = "dump",
4329 		.mode = S_IRUSR | S_IWUSR,
4330 	},
4331 	.size = 0,
4332 	.read = ipr_read_dump,
4333 	.write = ipr_write_dump
4334 };
4335 #else
4336 static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg) { return 0; };
4337 #endif
4338 
4339 /**
4340  * ipr_change_queue_depth - Change the device's queue depth
4341  * @sdev:	scsi device struct
4342  * @qdepth:	depth to set
4343  * @reason:	calling context
4344  *
4345  * Return value:
4346  * 	actual depth set
4347  **/
4348 static int ipr_change_queue_depth(struct scsi_device *sdev, int qdepth)
4349 {
4350 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4351 	struct ipr_resource_entry *res;
4352 	unsigned long lock_flags = 0;
4353 
4354 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4355 	res = (struct ipr_resource_entry *)sdev->hostdata;
4356 
4357 	if (res && ipr_is_gata(res) && qdepth > IPR_MAX_CMD_PER_ATA_LUN)
4358 		qdepth = IPR_MAX_CMD_PER_ATA_LUN;
4359 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4360 
4361 	scsi_change_queue_depth(sdev, qdepth);
4362 	return sdev->queue_depth;
4363 }
4364 
4365 /**
4366  * ipr_show_adapter_handle - Show the adapter's resource handle for this device
4367  * @dev:	device struct
4368  * @attr:	device attribute structure
4369  * @buf:	buffer
4370  *
4371  * Return value:
4372  * 	number of bytes printed to buffer
4373  **/
4374 static ssize_t ipr_show_adapter_handle(struct device *dev, struct device_attribute *attr, char *buf)
4375 {
4376 	struct scsi_device *sdev = to_scsi_device(dev);
4377 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4378 	struct ipr_resource_entry *res;
4379 	unsigned long lock_flags = 0;
4380 	ssize_t len = -ENXIO;
4381 
4382 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4383 	res = (struct ipr_resource_entry *)sdev->hostdata;
4384 	if (res)
4385 		len = snprintf(buf, PAGE_SIZE, "%08X\n", res->res_handle);
4386 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4387 	return len;
4388 }
4389 
4390 static struct device_attribute ipr_adapter_handle_attr = {
4391 	.attr = {
4392 		.name = 	"adapter_handle",
4393 		.mode =		S_IRUSR,
4394 	},
4395 	.show = ipr_show_adapter_handle
4396 };
4397 
4398 /**
4399  * ipr_show_resource_path - Show the resource path or the resource address for
4400  *			    this device.
4401  * @dev:	device struct
4402  * @attr:	device attribute structure
4403  * @buf:	buffer
4404  *
4405  * Return value:
4406  * 	number of bytes printed to buffer
4407  **/
4408 static ssize_t ipr_show_resource_path(struct device *dev, struct device_attribute *attr, char *buf)
4409 {
4410 	struct scsi_device *sdev = to_scsi_device(dev);
4411 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4412 	struct ipr_resource_entry *res;
4413 	unsigned long lock_flags = 0;
4414 	ssize_t len = -ENXIO;
4415 	char buffer[IPR_MAX_RES_PATH_LENGTH];
4416 
4417 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4418 	res = (struct ipr_resource_entry *)sdev->hostdata;
4419 	if (res && ioa_cfg->sis64)
4420 		len = snprintf(buf, PAGE_SIZE, "%s\n",
4421 			       __ipr_format_res_path(res->res_path, buffer,
4422 						     sizeof(buffer)));
4423 	else if (res)
4424 		len = snprintf(buf, PAGE_SIZE, "%d:%d:%d:%d\n", ioa_cfg->host->host_no,
4425 			       res->bus, res->target, res->lun);
4426 
4427 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4428 	return len;
4429 }
4430 
4431 static struct device_attribute ipr_resource_path_attr = {
4432 	.attr = {
4433 		.name = 	"resource_path",
4434 		.mode =		S_IRUGO,
4435 	},
4436 	.show = ipr_show_resource_path
4437 };
4438 
4439 /**
4440  * ipr_show_device_id - Show the device_id for this device.
4441  * @dev:	device struct
4442  * @attr:	device attribute structure
4443  * @buf:	buffer
4444  *
4445  * Return value:
4446  *	number of bytes printed to buffer
4447  **/
4448 static ssize_t ipr_show_device_id(struct device *dev, struct device_attribute *attr, char *buf)
4449 {
4450 	struct scsi_device *sdev = to_scsi_device(dev);
4451 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4452 	struct ipr_resource_entry *res;
4453 	unsigned long lock_flags = 0;
4454 	ssize_t len = -ENXIO;
4455 
4456 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4457 	res = (struct ipr_resource_entry *)sdev->hostdata;
4458 	if (res && ioa_cfg->sis64)
4459 		len = snprintf(buf, PAGE_SIZE, "0x%llx\n", be64_to_cpu(res->dev_id));
4460 	else if (res)
4461 		len = snprintf(buf, PAGE_SIZE, "0x%llx\n", res->lun_wwn);
4462 
4463 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4464 	return len;
4465 }
4466 
4467 static struct device_attribute ipr_device_id_attr = {
4468 	.attr = {
4469 		.name =		"device_id",
4470 		.mode =		S_IRUGO,
4471 	},
4472 	.show = ipr_show_device_id
4473 };
4474 
4475 /**
4476  * ipr_show_resource_type - Show the resource type for this device.
4477  * @dev:	device struct
4478  * @attr:	device attribute structure
4479  * @buf:	buffer
4480  *
4481  * Return value:
4482  *	number of bytes printed to buffer
4483  **/
4484 static ssize_t ipr_show_resource_type(struct device *dev, struct device_attribute *attr, char *buf)
4485 {
4486 	struct scsi_device *sdev = to_scsi_device(dev);
4487 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4488 	struct ipr_resource_entry *res;
4489 	unsigned long lock_flags = 0;
4490 	ssize_t len = -ENXIO;
4491 
4492 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4493 	res = (struct ipr_resource_entry *)sdev->hostdata;
4494 
4495 	if (res)
4496 		len = snprintf(buf, PAGE_SIZE, "%x\n", res->type);
4497 
4498 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4499 	return len;
4500 }
4501 
4502 static struct device_attribute ipr_resource_type_attr = {
4503 	.attr = {
4504 		.name =		"resource_type",
4505 		.mode =		S_IRUGO,
4506 	},
4507 	.show = ipr_show_resource_type
4508 };
4509 
4510 /**
4511  * ipr_show_raw_mode - Show the adapter's raw mode
4512  * @dev:	class device struct
4513  * @buf:	buffer
4514  *
4515  * Return value:
4516  * 	number of bytes printed to buffer
4517  **/
4518 static ssize_t ipr_show_raw_mode(struct device *dev,
4519 				 struct device_attribute *attr, char *buf)
4520 {
4521 	struct scsi_device *sdev = to_scsi_device(dev);
4522 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4523 	struct ipr_resource_entry *res;
4524 	unsigned long lock_flags = 0;
4525 	ssize_t len;
4526 
4527 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4528 	res = (struct ipr_resource_entry *)sdev->hostdata;
4529 	if (res)
4530 		len = snprintf(buf, PAGE_SIZE, "%d\n", res->raw_mode);
4531 	else
4532 		len = -ENXIO;
4533 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4534 	return len;
4535 }
4536 
4537 /**
4538  * ipr_store_raw_mode - Change the adapter's raw mode
4539  * @dev:	class device struct
4540  * @buf:	buffer
4541  *
4542  * Return value:
4543  * 	number of bytes printed to buffer
4544  **/
4545 static ssize_t ipr_store_raw_mode(struct device *dev,
4546 				  struct device_attribute *attr,
4547 				  const char *buf, size_t count)
4548 {
4549 	struct scsi_device *sdev = to_scsi_device(dev);
4550 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
4551 	struct ipr_resource_entry *res;
4552 	unsigned long lock_flags = 0;
4553 	ssize_t len;
4554 
4555 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4556 	res = (struct ipr_resource_entry *)sdev->hostdata;
4557 	if (res) {
4558 		if (ioa_cfg->sis64 && ipr_is_af_dasd_device(res)) {
4559 			res->raw_mode = simple_strtoul(buf, NULL, 10);
4560 			len = strlen(buf);
4561 			if (res->sdev)
4562 				sdev_printk(KERN_INFO, res->sdev, "raw mode is %s\n",
4563 					res->raw_mode ? "enabled" : "disabled");
4564 		} else
4565 			len = -EINVAL;
4566 	} else
4567 		len = -ENXIO;
4568 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4569 	return len;
4570 }
4571 
4572 static struct device_attribute ipr_raw_mode_attr = {
4573 	.attr = {
4574 		.name =		"raw_mode",
4575 		.mode =		S_IRUGO | S_IWUSR,
4576 	},
4577 	.show = ipr_show_raw_mode,
4578 	.store = ipr_store_raw_mode
4579 };
4580 
4581 static struct device_attribute *ipr_dev_attrs[] = {
4582 	&ipr_adapter_handle_attr,
4583 	&ipr_resource_path_attr,
4584 	&ipr_device_id_attr,
4585 	&ipr_resource_type_attr,
4586 	&ipr_raw_mode_attr,
4587 	NULL,
4588 };
4589 
4590 /**
4591  * ipr_biosparam - Return the HSC mapping
4592  * @sdev:			scsi device struct
4593  * @block_device:	block device pointer
4594  * @capacity:		capacity of the device
4595  * @parm:			Array containing returned HSC values.
4596  *
4597  * This function generates the HSC parms that fdisk uses.
4598  * We want to make sure we return something that places partitions
4599  * on 4k boundaries for best performance with the IOA.
4600  *
4601  * Return value:
4602  * 	0 on success
4603  **/
4604 static int ipr_biosparam(struct scsi_device *sdev,
4605 			 struct block_device *block_device,
4606 			 sector_t capacity, int *parm)
4607 {
4608 	int heads, sectors;
4609 	sector_t cylinders;
4610 
4611 	heads = 128;
4612 	sectors = 32;
4613 
4614 	cylinders = capacity;
4615 	sector_div(cylinders, (128 * 32));
4616 
4617 	/* return result */
4618 	parm[0] = heads;
4619 	parm[1] = sectors;
4620 	parm[2] = cylinders;
4621 
4622 	return 0;
4623 }
4624 
4625 /**
4626  * ipr_find_starget - Find target based on bus/target.
4627  * @starget:	scsi target struct
4628  *
4629  * Return value:
4630  * 	resource entry pointer if found / NULL if not found
4631  **/
4632 static struct ipr_resource_entry *ipr_find_starget(struct scsi_target *starget)
4633 {
4634 	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
4635 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
4636 	struct ipr_resource_entry *res;
4637 
4638 	list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
4639 		if ((res->bus == starget->channel) &&
4640 		    (res->target == starget->id)) {
4641 			return res;
4642 		}
4643 	}
4644 
4645 	return NULL;
4646 }
4647 
4648 static struct ata_port_info sata_port_info;
4649 
4650 /**
4651  * ipr_target_alloc - Prepare for commands to a SCSI target
4652  * @starget:	scsi target struct
4653  *
4654  * If the device is a SATA device, this function allocates an
4655  * ATA port with libata, else it does nothing.
4656  *
4657  * Return value:
4658  * 	0 on success / non-0 on failure
4659  **/
4660 static int ipr_target_alloc(struct scsi_target *starget)
4661 {
4662 	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
4663 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
4664 	struct ipr_sata_port *sata_port;
4665 	struct ata_port *ap;
4666 	struct ipr_resource_entry *res;
4667 	unsigned long lock_flags;
4668 
4669 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4670 	res = ipr_find_starget(starget);
4671 	starget->hostdata = NULL;
4672 
4673 	if (res && ipr_is_gata(res)) {
4674 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4675 		sata_port = kzalloc(sizeof(*sata_port), GFP_KERNEL);
4676 		if (!sata_port)
4677 			return -ENOMEM;
4678 
4679 		ap = ata_sas_port_alloc(&ioa_cfg->ata_host, &sata_port_info, shost);
4680 		if (ap) {
4681 			spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4682 			sata_port->ioa_cfg = ioa_cfg;
4683 			sata_port->ap = ap;
4684 			sata_port->res = res;
4685 
4686 			res->sata_port = sata_port;
4687 			ap->private_data = sata_port;
4688 			starget->hostdata = sata_port;
4689 		} else {
4690 			kfree(sata_port);
4691 			return -ENOMEM;
4692 		}
4693 	}
4694 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4695 
4696 	return 0;
4697 }
4698 
4699 /**
4700  * ipr_target_destroy - Destroy a SCSI target
4701  * @starget:	scsi target struct
4702  *
4703  * If the device was a SATA device, this function frees the libata
4704  * ATA port, else it does nothing.
4705  *
4706  **/
4707 static void ipr_target_destroy(struct scsi_target *starget)
4708 {
4709 	struct ipr_sata_port *sata_port = starget->hostdata;
4710 	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
4711 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
4712 
4713 	if (ioa_cfg->sis64) {
4714 		if (!ipr_find_starget(starget)) {
4715 			if (starget->channel == IPR_ARRAY_VIRTUAL_BUS)
4716 				clear_bit(starget->id, ioa_cfg->array_ids);
4717 			else if (starget->channel == IPR_VSET_VIRTUAL_BUS)
4718 				clear_bit(starget->id, ioa_cfg->vset_ids);
4719 			else if (starget->channel == 0)
4720 				clear_bit(starget->id, ioa_cfg->target_ids);
4721 		}
4722 	}
4723 
4724 	if (sata_port) {
4725 		starget->hostdata = NULL;
4726 		ata_sas_port_destroy(sata_port->ap);
4727 		kfree(sata_port);
4728 	}
4729 }
4730 
4731 /**
4732  * ipr_find_sdev - Find device based on bus/target/lun.
4733  * @sdev:	scsi device struct
4734  *
4735  * Return value:
4736  * 	resource entry pointer if found / NULL if not found
4737  **/
4738 static struct ipr_resource_entry *ipr_find_sdev(struct scsi_device *sdev)
4739 {
4740 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4741 	struct ipr_resource_entry *res;
4742 
4743 	list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
4744 		if ((res->bus == sdev->channel) &&
4745 		    (res->target == sdev->id) &&
4746 		    (res->lun == sdev->lun))
4747 			return res;
4748 	}
4749 
4750 	return NULL;
4751 }
4752 
4753 /**
4754  * ipr_slave_destroy - Unconfigure a SCSI device
4755  * @sdev:	scsi device struct
4756  *
4757  * Return value:
4758  * 	nothing
4759  **/
4760 static void ipr_slave_destroy(struct scsi_device *sdev)
4761 {
4762 	struct ipr_resource_entry *res;
4763 	struct ipr_ioa_cfg *ioa_cfg;
4764 	unsigned long lock_flags = 0;
4765 
4766 	ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4767 
4768 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4769 	res = (struct ipr_resource_entry *) sdev->hostdata;
4770 	if (res) {
4771 		if (res->sata_port)
4772 			res->sata_port->ap->link.device[0].class = ATA_DEV_NONE;
4773 		sdev->hostdata = NULL;
4774 		res->sdev = NULL;
4775 		res->sata_port = NULL;
4776 	}
4777 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4778 }
4779 
4780 /**
4781  * ipr_slave_configure - Configure a SCSI device
4782  * @sdev:	scsi device struct
4783  *
4784  * This function configures the specified scsi device.
4785  *
4786  * Return value:
4787  * 	0 on success
4788  **/
4789 static int ipr_slave_configure(struct scsi_device *sdev)
4790 {
4791 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4792 	struct ipr_resource_entry *res;
4793 	struct ata_port *ap = NULL;
4794 	unsigned long lock_flags = 0;
4795 	char buffer[IPR_MAX_RES_PATH_LENGTH];
4796 
4797 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4798 	res = sdev->hostdata;
4799 	if (res) {
4800 		if (ipr_is_af_dasd_device(res))
4801 			sdev->type = TYPE_RAID;
4802 		if (ipr_is_af_dasd_device(res) || ipr_is_ioa_resource(res)) {
4803 			sdev->scsi_level = 4;
4804 			sdev->no_uld_attach = 1;
4805 		}
4806 		if (ipr_is_vset_device(res)) {
4807 			sdev->scsi_level = SCSI_SPC_3;
4808 			blk_queue_rq_timeout(sdev->request_queue,
4809 					     IPR_VSET_RW_TIMEOUT);
4810 			blk_queue_max_hw_sectors(sdev->request_queue, IPR_VSET_MAX_SECTORS);
4811 		}
4812 		if (ipr_is_gata(res) && res->sata_port)
4813 			ap = res->sata_port->ap;
4814 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4815 
4816 		if (ap) {
4817 			scsi_change_queue_depth(sdev, IPR_MAX_CMD_PER_ATA_LUN);
4818 			ata_sas_slave_configure(sdev, ap);
4819 		}
4820 
4821 		if (ioa_cfg->sis64)
4822 			sdev_printk(KERN_INFO, sdev, "Resource path: %s\n",
4823 				    ipr_format_res_path(ioa_cfg,
4824 				res->res_path, buffer, sizeof(buffer)));
4825 		return 0;
4826 	}
4827 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4828 	return 0;
4829 }
4830 
4831 /**
4832  * ipr_ata_slave_alloc - Prepare for commands to a SATA device
4833  * @sdev:	scsi device struct
4834  *
4835  * This function initializes an ATA port so that future commands
4836  * sent through queuecommand will work.
4837  *
4838  * Return value:
4839  * 	0 on success
4840  **/
4841 static int ipr_ata_slave_alloc(struct scsi_device *sdev)
4842 {
4843 	struct ipr_sata_port *sata_port = NULL;
4844 	int rc = -ENXIO;
4845 
4846 	ENTER;
4847 	if (sdev->sdev_target)
4848 		sata_port = sdev->sdev_target->hostdata;
4849 	if (sata_port) {
4850 		rc = ata_sas_port_init(sata_port->ap);
4851 		if (rc == 0)
4852 			rc = ata_sas_sync_probe(sata_port->ap);
4853 	}
4854 
4855 	if (rc)
4856 		ipr_slave_destroy(sdev);
4857 
4858 	LEAVE;
4859 	return rc;
4860 }
4861 
4862 /**
4863  * ipr_slave_alloc - Prepare for commands to a device.
4864  * @sdev:	scsi device struct
4865  *
4866  * This function saves a pointer to the resource entry
4867  * in the scsi device struct if the device exists. We
4868  * can then use this pointer in ipr_queuecommand when
4869  * handling new commands.
4870  *
4871  * Return value:
4872  * 	0 on success / -ENXIO if device does not exist
4873  **/
4874 static int ipr_slave_alloc(struct scsi_device *sdev)
4875 {
4876 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) sdev->host->hostdata;
4877 	struct ipr_resource_entry *res;
4878 	unsigned long lock_flags;
4879 	int rc = -ENXIO;
4880 
4881 	sdev->hostdata = NULL;
4882 
4883 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4884 
4885 	res = ipr_find_sdev(sdev);
4886 	if (res) {
4887 		res->sdev = sdev;
4888 		res->add_to_ml = 0;
4889 		res->in_erp = 0;
4890 		sdev->hostdata = res;
4891 		if (!ipr_is_naca_model(res))
4892 			res->needs_sync_complete = 1;
4893 		rc = 0;
4894 		if (ipr_is_gata(res)) {
4895 			spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4896 			return ipr_ata_slave_alloc(sdev);
4897 		}
4898 	}
4899 
4900 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
4901 
4902 	return rc;
4903 }
4904 
4905 /**
4906  * ipr_match_lun - Match function for specified LUN
4907  * @ipr_cmd:	ipr command struct
4908  * @device:		device to match (sdev)
4909  *
4910  * Returns:
4911  *	1 if command matches sdev / 0 if command does not match sdev
4912  **/
4913 static int ipr_match_lun(struct ipr_cmnd *ipr_cmd, void *device)
4914 {
4915 	if (ipr_cmd->scsi_cmd && ipr_cmd->scsi_cmd->device == device)
4916 		return 1;
4917 	return 0;
4918 }
4919 
4920 /**
4921  * ipr_wait_for_ops - Wait for matching commands to complete
4922  * @ipr_cmd:	ipr command struct
4923  * @device:		device to match (sdev)
4924  * @match:		match function to use
4925  *
4926  * Returns:
4927  *	SUCCESS / FAILED
4928  **/
4929 static int ipr_wait_for_ops(struct ipr_ioa_cfg *ioa_cfg, void *device,
4930 			    int (*match)(struct ipr_cmnd *, void *))
4931 {
4932 	struct ipr_cmnd *ipr_cmd;
4933 	int wait;
4934 	unsigned long flags;
4935 	struct ipr_hrr_queue *hrrq;
4936 	signed long timeout = IPR_ABORT_TASK_TIMEOUT;
4937 	DECLARE_COMPLETION_ONSTACK(comp);
4938 
4939 	ENTER;
4940 	do {
4941 		wait = 0;
4942 
4943 		for_each_hrrq(hrrq, ioa_cfg) {
4944 			spin_lock_irqsave(hrrq->lock, flags);
4945 			list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
4946 				if (match(ipr_cmd, device)) {
4947 					ipr_cmd->eh_comp = &comp;
4948 					wait++;
4949 				}
4950 			}
4951 			spin_unlock_irqrestore(hrrq->lock, flags);
4952 		}
4953 
4954 		if (wait) {
4955 			timeout = wait_for_completion_timeout(&comp, timeout);
4956 
4957 			if (!timeout) {
4958 				wait = 0;
4959 
4960 				for_each_hrrq(hrrq, ioa_cfg) {
4961 					spin_lock_irqsave(hrrq->lock, flags);
4962 					list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
4963 						if (match(ipr_cmd, device)) {
4964 							ipr_cmd->eh_comp = NULL;
4965 							wait++;
4966 						}
4967 					}
4968 					spin_unlock_irqrestore(hrrq->lock, flags);
4969 				}
4970 
4971 				if (wait)
4972 					dev_err(&ioa_cfg->pdev->dev, "Timed out waiting for aborted commands\n");
4973 				LEAVE;
4974 				return wait ? FAILED : SUCCESS;
4975 			}
4976 		}
4977 	} while (wait);
4978 
4979 	LEAVE;
4980 	return SUCCESS;
4981 }
4982 
4983 static int ipr_eh_host_reset(struct scsi_cmnd *cmd)
4984 {
4985 	struct ipr_ioa_cfg *ioa_cfg;
4986 	unsigned long lock_flags = 0;
4987 	int rc = SUCCESS;
4988 
4989 	ENTER;
4990 	ioa_cfg = (struct ipr_ioa_cfg *) cmd->device->host->hostdata;
4991 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
4992 
4993 	if (!ioa_cfg->in_reset_reload && !ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
4994 		ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_ABBREV);
4995 		dev_err(&ioa_cfg->pdev->dev,
4996 			"Adapter being reset as a result of error recovery.\n");
4997 
4998 		if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
4999 			ioa_cfg->sdt_state = GET_DUMP;
5000 	}
5001 
5002 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5003 	wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
5004 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5005 
5006 	/* If we got hit with a host reset while we were already resetting
5007 	 the adapter for some reason, and the reset failed. */
5008 	if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
5009 		ipr_trace;
5010 		rc = FAILED;
5011 	}
5012 
5013 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5014 	LEAVE;
5015 	return rc;
5016 }
5017 
5018 /**
5019  * ipr_device_reset - Reset the device
5020  * @ioa_cfg:	ioa config struct
5021  * @res:		resource entry struct
5022  *
5023  * This function issues a device reset to the affected device.
5024  * If the device is a SCSI device, a LUN reset will be sent
5025  * to the device first. If that does not work, a target reset
5026  * will be sent. If the device is a SATA device, a PHY reset will
5027  * be sent.
5028  *
5029  * Return value:
5030  *	0 on success / non-zero on failure
5031  **/
5032 static int ipr_device_reset(struct ipr_ioa_cfg *ioa_cfg,
5033 			    struct ipr_resource_entry *res)
5034 {
5035 	struct ipr_cmnd *ipr_cmd;
5036 	struct ipr_ioarcb *ioarcb;
5037 	struct ipr_cmd_pkt *cmd_pkt;
5038 	struct ipr_ioarcb_ata_regs *regs;
5039 	u32 ioasc;
5040 
5041 	ENTER;
5042 	ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
5043 	ioarcb = &ipr_cmd->ioarcb;
5044 	cmd_pkt = &ioarcb->cmd_pkt;
5045 
5046 	if (ipr_cmd->ioa_cfg->sis64) {
5047 		regs = &ipr_cmd->i.ata_ioadl.regs;
5048 		ioarcb->add_cmd_parms_offset = cpu_to_be16(sizeof(*ioarcb));
5049 	} else
5050 		regs = &ioarcb->u.add_data.u.regs;
5051 
5052 	ioarcb->res_handle = res->res_handle;
5053 	cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5054 	cmd_pkt->cdb[0] = IPR_RESET_DEVICE;
5055 	if (ipr_is_gata(res)) {
5056 		cmd_pkt->cdb[2] = IPR_ATA_PHY_RESET;
5057 		ioarcb->add_cmd_parms_len = cpu_to_be16(sizeof(regs->flags));
5058 		regs->flags |= IPR_ATA_FLAG_STATUS_ON_GOOD_COMPLETION;
5059 	}
5060 
5061 	ipr_send_blocking_cmd(ipr_cmd, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT);
5062 	ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5063 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5064 	if (ipr_is_gata(res) && res->sata_port && ioasc != IPR_IOASC_IOA_WAS_RESET) {
5065 		if (ipr_cmd->ioa_cfg->sis64)
5066 			memcpy(&res->sata_port->ioasa, &ipr_cmd->s.ioasa64.u.gata,
5067 			       sizeof(struct ipr_ioasa_gata));
5068 		else
5069 			memcpy(&res->sata_port->ioasa, &ipr_cmd->s.ioasa.u.gata,
5070 			       sizeof(struct ipr_ioasa_gata));
5071 	}
5072 
5073 	LEAVE;
5074 	return IPR_IOASC_SENSE_KEY(ioasc) ? -EIO : 0;
5075 }
5076 
5077 /**
5078  * ipr_sata_reset - Reset the SATA port
5079  * @link:	SATA link to reset
5080  * @classes:	class of the attached device
5081  *
5082  * This function issues a SATA phy reset to the affected ATA link.
5083  *
5084  * Return value:
5085  *	0 on success / non-zero on failure
5086  **/
5087 static int ipr_sata_reset(struct ata_link *link, unsigned int *classes,
5088 				unsigned long deadline)
5089 {
5090 	struct ipr_sata_port *sata_port = link->ap->private_data;
5091 	struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
5092 	struct ipr_resource_entry *res;
5093 	unsigned long lock_flags = 0;
5094 	int rc = -ENXIO;
5095 
5096 	ENTER;
5097 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5098 	while (ioa_cfg->in_reset_reload) {
5099 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5100 		wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
5101 		spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5102 	}
5103 
5104 	res = sata_port->res;
5105 	if (res) {
5106 		rc = ipr_device_reset(ioa_cfg, res);
5107 		*classes = res->ata_class;
5108 	}
5109 
5110 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5111 	LEAVE;
5112 	return rc;
5113 }
5114 
5115 /**
5116  * ipr_eh_dev_reset - Reset the device
5117  * @scsi_cmd:	scsi command struct
5118  *
5119  * This function issues a device reset to the affected device.
5120  * A LUN reset will be sent to the device first. If that does
5121  * not work, a target reset will be sent.
5122  *
5123  * Return value:
5124  *	SUCCESS / FAILED
5125  **/
5126 static int __ipr_eh_dev_reset(struct scsi_cmnd *scsi_cmd)
5127 {
5128 	struct ipr_cmnd *ipr_cmd;
5129 	struct ipr_ioa_cfg *ioa_cfg;
5130 	struct ipr_resource_entry *res;
5131 	struct ata_port *ap;
5132 	int rc = 0;
5133 	struct ipr_hrr_queue *hrrq;
5134 
5135 	ENTER;
5136 	ioa_cfg = (struct ipr_ioa_cfg *) scsi_cmd->device->host->hostdata;
5137 	res = scsi_cmd->device->hostdata;
5138 
5139 	if (!res)
5140 		return FAILED;
5141 
5142 	/*
5143 	 * If we are currently going through reset/reload, return failed. This will force the
5144 	 * mid-layer to call ipr_eh_host_reset, which will then go to sleep and wait for the
5145 	 * reset to complete
5146 	 */
5147 	if (ioa_cfg->in_reset_reload)
5148 		return FAILED;
5149 	if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
5150 		return FAILED;
5151 
5152 	for_each_hrrq(hrrq, ioa_cfg) {
5153 		spin_lock(&hrrq->_lock);
5154 		list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
5155 			if (ipr_cmd->ioarcb.res_handle == res->res_handle) {
5156 				if (ipr_cmd->scsi_cmd)
5157 					ipr_cmd->done = ipr_scsi_eh_done;
5158 				if (ipr_cmd->qc)
5159 					ipr_cmd->done = ipr_sata_eh_done;
5160 				if (ipr_cmd->qc &&
5161 				    !(ipr_cmd->qc->flags & ATA_QCFLAG_FAILED)) {
5162 					ipr_cmd->qc->err_mask |= AC_ERR_TIMEOUT;
5163 					ipr_cmd->qc->flags |= ATA_QCFLAG_FAILED;
5164 				}
5165 			}
5166 		}
5167 		spin_unlock(&hrrq->_lock);
5168 	}
5169 	res->resetting_device = 1;
5170 	scmd_printk(KERN_ERR, scsi_cmd, "Resetting device\n");
5171 
5172 	if (ipr_is_gata(res) && res->sata_port) {
5173 		ap = res->sata_port->ap;
5174 		spin_unlock_irq(scsi_cmd->device->host->host_lock);
5175 		ata_std_error_handler(ap);
5176 		spin_lock_irq(scsi_cmd->device->host->host_lock);
5177 
5178 		for_each_hrrq(hrrq, ioa_cfg) {
5179 			spin_lock(&hrrq->_lock);
5180 			list_for_each_entry(ipr_cmd,
5181 					    &hrrq->hrrq_pending_q, queue) {
5182 				if (ipr_cmd->ioarcb.res_handle ==
5183 				    res->res_handle) {
5184 					rc = -EIO;
5185 					break;
5186 				}
5187 			}
5188 			spin_unlock(&hrrq->_lock);
5189 		}
5190 	} else
5191 		rc = ipr_device_reset(ioa_cfg, res);
5192 	res->resetting_device = 0;
5193 	res->reset_occurred = 1;
5194 
5195 	LEAVE;
5196 	return rc ? FAILED : SUCCESS;
5197 }
5198 
5199 static int ipr_eh_dev_reset(struct scsi_cmnd *cmd)
5200 {
5201 	int rc;
5202 	struct ipr_ioa_cfg *ioa_cfg;
5203 
5204 	ioa_cfg = (struct ipr_ioa_cfg *) cmd->device->host->hostdata;
5205 
5206 	spin_lock_irq(cmd->device->host->host_lock);
5207 	rc = __ipr_eh_dev_reset(cmd);
5208 	spin_unlock_irq(cmd->device->host->host_lock);
5209 
5210 	if (rc == SUCCESS)
5211 		rc = ipr_wait_for_ops(ioa_cfg, cmd->device, ipr_match_lun);
5212 
5213 	return rc;
5214 }
5215 
5216 /**
5217  * ipr_bus_reset_done - Op done function for bus reset.
5218  * @ipr_cmd:	ipr command struct
5219  *
5220  * This function is the op done function for a bus reset
5221  *
5222  * Return value:
5223  * 	none
5224  **/
5225 static void ipr_bus_reset_done(struct ipr_cmnd *ipr_cmd)
5226 {
5227 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
5228 	struct ipr_resource_entry *res;
5229 
5230 	ENTER;
5231 	if (!ioa_cfg->sis64)
5232 		list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
5233 			if (res->res_handle == ipr_cmd->ioarcb.res_handle) {
5234 				scsi_report_bus_reset(ioa_cfg->host, res->bus);
5235 				break;
5236 			}
5237 		}
5238 
5239 	/*
5240 	 * If abort has not completed, indicate the reset has, else call the
5241 	 * abort's done function to wake the sleeping eh thread
5242 	 */
5243 	if (ipr_cmd->sibling->sibling)
5244 		ipr_cmd->sibling->sibling = NULL;
5245 	else
5246 		ipr_cmd->sibling->done(ipr_cmd->sibling);
5247 
5248 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5249 	LEAVE;
5250 }
5251 
5252 /**
5253  * ipr_abort_timeout - An abort task has timed out
5254  * @ipr_cmd:	ipr command struct
5255  *
5256  * This function handles when an abort task times out. If this
5257  * happens we issue a bus reset since we have resources tied
5258  * up that must be freed before returning to the midlayer.
5259  *
5260  * Return value:
5261  *	none
5262  **/
5263 static void ipr_abort_timeout(struct ipr_cmnd *ipr_cmd)
5264 {
5265 	struct ipr_cmnd *reset_cmd;
5266 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
5267 	struct ipr_cmd_pkt *cmd_pkt;
5268 	unsigned long lock_flags = 0;
5269 
5270 	ENTER;
5271 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
5272 	if (ipr_cmd->completion.done || ioa_cfg->in_reset_reload) {
5273 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5274 		return;
5275 	}
5276 
5277 	sdev_printk(KERN_ERR, ipr_cmd->u.sdev, "Abort timed out. Resetting bus.\n");
5278 	reset_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
5279 	ipr_cmd->sibling = reset_cmd;
5280 	reset_cmd->sibling = ipr_cmd;
5281 	reset_cmd->ioarcb.res_handle = ipr_cmd->ioarcb.res_handle;
5282 	cmd_pkt = &reset_cmd->ioarcb.cmd_pkt;
5283 	cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5284 	cmd_pkt->cdb[0] = IPR_RESET_DEVICE;
5285 	cmd_pkt->cdb[2] = IPR_RESET_TYPE_SELECT | IPR_BUS_RESET;
5286 
5287 	ipr_do_req(reset_cmd, ipr_bus_reset_done, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT);
5288 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
5289 	LEAVE;
5290 }
5291 
5292 /**
5293  * ipr_cancel_op - Cancel specified op
5294  * @scsi_cmd:	scsi command struct
5295  *
5296  * This function cancels specified op.
5297  *
5298  * Return value:
5299  *	SUCCESS / FAILED
5300  **/
5301 static int ipr_cancel_op(struct scsi_cmnd *scsi_cmd)
5302 {
5303 	struct ipr_cmnd *ipr_cmd;
5304 	struct ipr_ioa_cfg *ioa_cfg;
5305 	struct ipr_resource_entry *res;
5306 	struct ipr_cmd_pkt *cmd_pkt;
5307 	u32 ioasc, int_reg;
5308 	int op_found = 0;
5309 	struct ipr_hrr_queue *hrrq;
5310 
5311 	ENTER;
5312 	ioa_cfg = (struct ipr_ioa_cfg *)scsi_cmd->device->host->hostdata;
5313 	res = scsi_cmd->device->hostdata;
5314 
5315 	/* If we are currently going through reset/reload, return failed.
5316 	 * This will force the mid-layer to call ipr_eh_host_reset,
5317 	 * which will then go to sleep and wait for the reset to complete
5318 	 */
5319 	if (ioa_cfg->in_reset_reload ||
5320 	    ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
5321 		return FAILED;
5322 	if (!res)
5323 		return FAILED;
5324 
5325 	/*
5326 	 * If we are aborting a timed out op, chances are that the timeout was caused
5327 	 * by a still not detected EEH error. In such cases, reading a register will
5328 	 * trigger the EEH recovery infrastructure.
5329 	 */
5330 	int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
5331 
5332 	if (!ipr_is_gscsi(res))
5333 		return FAILED;
5334 
5335 	for_each_hrrq(hrrq, ioa_cfg) {
5336 		spin_lock(&hrrq->_lock);
5337 		list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
5338 			if (ipr_cmd->scsi_cmd == scsi_cmd) {
5339 				ipr_cmd->done = ipr_scsi_eh_done;
5340 				op_found = 1;
5341 				break;
5342 			}
5343 		}
5344 		spin_unlock(&hrrq->_lock);
5345 	}
5346 
5347 	if (!op_found)
5348 		return SUCCESS;
5349 
5350 	ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
5351 	ipr_cmd->ioarcb.res_handle = res->res_handle;
5352 	cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
5353 	cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5354 	cmd_pkt->cdb[0] = IPR_CANCEL_ALL_REQUESTS;
5355 	ipr_cmd->u.sdev = scsi_cmd->device;
5356 
5357 	scmd_printk(KERN_ERR, scsi_cmd, "Aborting command: %02X\n",
5358 		    scsi_cmd->cmnd[0]);
5359 	ipr_send_blocking_cmd(ipr_cmd, ipr_abort_timeout, IPR_CANCEL_ALL_TIMEOUT);
5360 	ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5361 
5362 	/*
5363 	 * If the abort task timed out and we sent a bus reset, we will get
5364 	 * one the following responses to the abort
5365 	 */
5366 	if (ioasc == IPR_IOASC_BUS_WAS_RESET || ioasc == IPR_IOASC_SYNC_REQUIRED) {
5367 		ioasc = 0;
5368 		ipr_trace;
5369 	}
5370 
5371 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5372 	if (!ipr_is_naca_model(res))
5373 		res->needs_sync_complete = 1;
5374 
5375 	LEAVE;
5376 	return IPR_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
5377 }
5378 
5379 /**
5380  * ipr_eh_abort - Abort a single op
5381  * @scsi_cmd:	scsi command struct
5382  *
5383  * Return value:
5384  *	0 if scan in progress / 1 if scan is complete
5385  **/
5386 static int ipr_scan_finished(struct Scsi_Host *shost, unsigned long elapsed_time)
5387 {
5388 	unsigned long lock_flags;
5389 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *) shost->hostdata;
5390 	int rc = 0;
5391 
5392 	spin_lock_irqsave(shost->host_lock, lock_flags);
5393 	if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead || ioa_cfg->scan_done)
5394 		rc = 1;
5395 	if ((elapsed_time/HZ) > (ioa_cfg->transop_timeout * 2))
5396 		rc = 1;
5397 	spin_unlock_irqrestore(shost->host_lock, lock_flags);
5398 	return rc;
5399 }
5400 
5401 /**
5402  * ipr_eh_host_reset - Reset the host adapter
5403  * @scsi_cmd:	scsi command struct
5404  *
5405  * Return value:
5406  * 	SUCCESS / FAILED
5407  **/
5408 static int ipr_eh_abort(struct scsi_cmnd *scsi_cmd)
5409 {
5410 	unsigned long flags;
5411 	int rc;
5412 	struct ipr_ioa_cfg *ioa_cfg;
5413 
5414 	ENTER;
5415 
5416 	ioa_cfg = (struct ipr_ioa_cfg *) scsi_cmd->device->host->hostdata;
5417 
5418 	spin_lock_irqsave(scsi_cmd->device->host->host_lock, flags);
5419 	rc = ipr_cancel_op(scsi_cmd);
5420 	spin_unlock_irqrestore(scsi_cmd->device->host->host_lock, flags);
5421 
5422 	if (rc == SUCCESS)
5423 		rc = ipr_wait_for_ops(ioa_cfg, scsi_cmd->device, ipr_match_lun);
5424 	LEAVE;
5425 	return rc;
5426 }
5427 
5428 /**
5429  * ipr_handle_other_interrupt - Handle "other" interrupts
5430  * @ioa_cfg:	ioa config struct
5431  * @int_reg:	interrupt register
5432  *
5433  * Return value:
5434  * 	IRQ_NONE / IRQ_HANDLED
5435  **/
5436 static irqreturn_t ipr_handle_other_interrupt(struct ipr_ioa_cfg *ioa_cfg,
5437 					      u32 int_reg)
5438 {
5439 	irqreturn_t rc = IRQ_HANDLED;
5440 	u32 int_mask_reg;
5441 
5442 	int_mask_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg32);
5443 	int_reg &= ~int_mask_reg;
5444 
5445 	/* If an interrupt on the adapter did not occur, ignore it.
5446 	 * Or in the case of SIS 64, check for a stage change interrupt.
5447 	 */
5448 	if ((int_reg & IPR_PCII_OPER_INTERRUPTS) == 0) {
5449 		if (ioa_cfg->sis64) {
5450 			int_mask_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
5451 			int_reg = readl(ioa_cfg->regs.sense_interrupt_reg) & ~int_mask_reg;
5452 			if (int_reg & IPR_PCII_IPL_STAGE_CHANGE) {
5453 
5454 				/* clear stage change */
5455 				writel(IPR_PCII_IPL_STAGE_CHANGE, ioa_cfg->regs.clr_interrupt_reg);
5456 				int_reg = readl(ioa_cfg->regs.sense_interrupt_reg) & ~int_mask_reg;
5457 				list_del(&ioa_cfg->reset_cmd->queue);
5458 				del_timer(&ioa_cfg->reset_cmd->timer);
5459 				ipr_reset_ioa_job(ioa_cfg->reset_cmd);
5460 				return IRQ_HANDLED;
5461 			}
5462 		}
5463 
5464 		return IRQ_NONE;
5465 	}
5466 
5467 	if (int_reg & IPR_PCII_IOA_TRANS_TO_OPER) {
5468 		/* Mask the interrupt */
5469 		writel(IPR_PCII_IOA_TRANS_TO_OPER, ioa_cfg->regs.set_interrupt_mask_reg);
5470 		int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
5471 
5472 		list_del(&ioa_cfg->reset_cmd->queue);
5473 		del_timer(&ioa_cfg->reset_cmd->timer);
5474 		ipr_reset_ioa_job(ioa_cfg->reset_cmd);
5475 	} else if ((int_reg & IPR_PCII_HRRQ_UPDATED) == int_reg) {
5476 		if (ioa_cfg->clear_isr) {
5477 			if (ipr_debug && printk_ratelimit())
5478 				dev_err(&ioa_cfg->pdev->dev,
5479 					"Spurious interrupt detected. 0x%08X\n", int_reg);
5480 			writel(IPR_PCII_HRRQ_UPDATED, ioa_cfg->regs.clr_interrupt_reg32);
5481 			int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
5482 			return IRQ_NONE;
5483 		}
5484 	} else {
5485 		if (int_reg & IPR_PCII_IOA_UNIT_CHECKED)
5486 			ioa_cfg->ioa_unit_checked = 1;
5487 		else if (int_reg & IPR_PCII_NO_HOST_RRQ)
5488 			dev_err(&ioa_cfg->pdev->dev,
5489 				"No Host RRQ. 0x%08X\n", int_reg);
5490 		else
5491 			dev_err(&ioa_cfg->pdev->dev,
5492 				"Permanent IOA failure. 0x%08X\n", int_reg);
5493 
5494 		if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
5495 			ioa_cfg->sdt_state = GET_DUMP;
5496 
5497 		ipr_mask_and_clear_interrupts(ioa_cfg, ~0);
5498 		ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
5499 	}
5500 
5501 	return rc;
5502 }
5503 
5504 /**
5505  * ipr_isr_eh - Interrupt service routine error handler
5506  * @ioa_cfg:	ioa config struct
5507  * @msg:	message to log
5508  *
5509  * Return value:
5510  * 	none
5511  **/
5512 static void ipr_isr_eh(struct ipr_ioa_cfg *ioa_cfg, char *msg, u16 number)
5513 {
5514 	ioa_cfg->errors_logged++;
5515 	dev_err(&ioa_cfg->pdev->dev, "%s %d\n", msg, number);
5516 
5517 	if (WAIT_FOR_DUMP == ioa_cfg->sdt_state)
5518 		ioa_cfg->sdt_state = GET_DUMP;
5519 
5520 	ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
5521 }
5522 
5523 static int ipr_process_hrrq(struct ipr_hrr_queue *hrr_queue, int budget,
5524 						struct list_head *doneq)
5525 {
5526 	u32 ioasc;
5527 	u16 cmd_index;
5528 	struct ipr_cmnd *ipr_cmd;
5529 	struct ipr_ioa_cfg *ioa_cfg = hrr_queue->ioa_cfg;
5530 	int num_hrrq = 0;
5531 
5532 	/* If interrupts are disabled, ignore the interrupt */
5533 	if (!hrr_queue->allow_interrupts)
5534 		return 0;
5535 
5536 	while ((be32_to_cpu(*hrr_queue->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
5537 	       hrr_queue->toggle_bit) {
5538 
5539 		cmd_index = (be32_to_cpu(*hrr_queue->hrrq_curr) &
5540 			     IPR_HRRQ_REQ_RESP_HANDLE_MASK) >>
5541 			     IPR_HRRQ_REQ_RESP_HANDLE_SHIFT;
5542 
5543 		if (unlikely(cmd_index > hrr_queue->max_cmd_id ||
5544 			     cmd_index < hrr_queue->min_cmd_id)) {
5545 			ipr_isr_eh(ioa_cfg,
5546 				"Invalid response handle from IOA: ",
5547 				cmd_index);
5548 			break;
5549 		}
5550 
5551 		ipr_cmd = ioa_cfg->ipr_cmnd_list[cmd_index];
5552 		ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5553 
5554 		ipr_trc_hook(ipr_cmd, IPR_TRACE_FINISH, ioasc);
5555 
5556 		list_move_tail(&ipr_cmd->queue, doneq);
5557 
5558 		if (hrr_queue->hrrq_curr < hrr_queue->hrrq_end) {
5559 			hrr_queue->hrrq_curr++;
5560 		} else {
5561 			hrr_queue->hrrq_curr = hrr_queue->hrrq_start;
5562 			hrr_queue->toggle_bit ^= 1u;
5563 		}
5564 		num_hrrq++;
5565 		if (budget > 0 && num_hrrq >= budget)
5566 			break;
5567 	}
5568 
5569 	return num_hrrq;
5570 }
5571 
5572 static int ipr_iopoll(struct blk_iopoll *iop, int budget)
5573 {
5574 	struct ipr_ioa_cfg *ioa_cfg;
5575 	struct ipr_hrr_queue *hrrq;
5576 	struct ipr_cmnd *ipr_cmd, *temp;
5577 	unsigned long hrrq_flags;
5578 	int completed_ops;
5579 	LIST_HEAD(doneq);
5580 
5581 	hrrq = container_of(iop, struct ipr_hrr_queue, iopoll);
5582 	ioa_cfg = hrrq->ioa_cfg;
5583 
5584 	spin_lock_irqsave(hrrq->lock, hrrq_flags);
5585 	completed_ops = ipr_process_hrrq(hrrq, budget, &doneq);
5586 
5587 	if (completed_ops < budget)
5588 		blk_iopoll_complete(iop);
5589 	spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5590 
5591 	list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
5592 		list_del(&ipr_cmd->queue);
5593 		del_timer(&ipr_cmd->timer);
5594 		ipr_cmd->fast_done(ipr_cmd);
5595 	}
5596 
5597 	return completed_ops;
5598 }
5599 
5600 /**
5601  * ipr_isr - Interrupt service routine
5602  * @irq:	irq number
5603  * @devp:	pointer to ioa config struct
5604  *
5605  * Return value:
5606  * 	IRQ_NONE / IRQ_HANDLED
5607  **/
5608 static irqreturn_t ipr_isr(int irq, void *devp)
5609 {
5610 	struct ipr_hrr_queue *hrrq = (struct ipr_hrr_queue *)devp;
5611 	struct ipr_ioa_cfg *ioa_cfg = hrrq->ioa_cfg;
5612 	unsigned long hrrq_flags = 0;
5613 	u32 int_reg = 0;
5614 	int num_hrrq = 0;
5615 	int irq_none = 0;
5616 	struct ipr_cmnd *ipr_cmd, *temp;
5617 	irqreturn_t rc = IRQ_NONE;
5618 	LIST_HEAD(doneq);
5619 
5620 	spin_lock_irqsave(hrrq->lock, hrrq_flags);
5621 	/* If interrupts are disabled, ignore the interrupt */
5622 	if (!hrrq->allow_interrupts) {
5623 		spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5624 		return IRQ_NONE;
5625 	}
5626 
5627 	while (1) {
5628 		if (ipr_process_hrrq(hrrq, -1, &doneq)) {
5629 			rc =  IRQ_HANDLED;
5630 
5631 			if (!ioa_cfg->clear_isr)
5632 				break;
5633 
5634 			/* Clear the PCI interrupt */
5635 			num_hrrq = 0;
5636 			do {
5637 				writel(IPR_PCII_HRRQ_UPDATED,
5638 				     ioa_cfg->regs.clr_interrupt_reg32);
5639 				int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
5640 			} while (int_reg & IPR_PCII_HRRQ_UPDATED &&
5641 				num_hrrq++ < IPR_MAX_HRRQ_RETRIES);
5642 
5643 		} else if (rc == IRQ_NONE && irq_none == 0) {
5644 			int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
5645 			irq_none++;
5646 		} else if (num_hrrq == IPR_MAX_HRRQ_RETRIES &&
5647 			   int_reg & IPR_PCII_HRRQ_UPDATED) {
5648 			ipr_isr_eh(ioa_cfg,
5649 				"Error clearing HRRQ: ", num_hrrq);
5650 			rc = IRQ_HANDLED;
5651 			break;
5652 		} else
5653 			break;
5654 	}
5655 
5656 	if (unlikely(rc == IRQ_NONE))
5657 		rc = ipr_handle_other_interrupt(ioa_cfg, int_reg);
5658 
5659 	spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5660 	list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
5661 		list_del(&ipr_cmd->queue);
5662 		del_timer(&ipr_cmd->timer);
5663 		ipr_cmd->fast_done(ipr_cmd);
5664 	}
5665 	return rc;
5666 }
5667 
5668 /**
5669  * ipr_isr_mhrrq - Interrupt service routine
5670  * @irq:	irq number
5671  * @devp:	pointer to ioa config struct
5672  *
5673  * Return value:
5674  *	IRQ_NONE / IRQ_HANDLED
5675  **/
5676 static irqreturn_t ipr_isr_mhrrq(int irq, void *devp)
5677 {
5678 	struct ipr_hrr_queue *hrrq = (struct ipr_hrr_queue *)devp;
5679 	struct ipr_ioa_cfg *ioa_cfg = hrrq->ioa_cfg;
5680 	unsigned long hrrq_flags = 0;
5681 	struct ipr_cmnd *ipr_cmd, *temp;
5682 	irqreturn_t rc = IRQ_NONE;
5683 	LIST_HEAD(doneq);
5684 
5685 	spin_lock_irqsave(hrrq->lock, hrrq_flags);
5686 
5687 	/* If interrupts are disabled, ignore the interrupt */
5688 	if (!hrrq->allow_interrupts) {
5689 		spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5690 		return IRQ_NONE;
5691 	}
5692 
5693 	if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
5694 		if ((be32_to_cpu(*hrrq->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
5695 		       hrrq->toggle_bit) {
5696 			if (!blk_iopoll_sched_prep(&hrrq->iopoll))
5697 				blk_iopoll_sched(&hrrq->iopoll);
5698 			spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5699 			return IRQ_HANDLED;
5700 		}
5701 	} else {
5702 		if ((be32_to_cpu(*hrrq->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
5703 			hrrq->toggle_bit)
5704 
5705 			if (ipr_process_hrrq(hrrq, -1, &doneq))
5706 				rc =  IRQ_HANDLED;
5707 	}
5708 
5709 	spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
5710 
5711 	list_for_each_entry_safe(ipr_cmd, temp, &doneq, queue) {
5712 		list_del(&ipr_cmd->queue);
5713 		del_timer(&ipr_cmd->timer);
5714 		ipr_cmd->fast_done(ipr_cmd);
5715 	}
5716 	return rc;
5717 }
5718 
5719 /**
5720  * ipr_build_ioadl64 - Build a scatter/gather list and map the buffer
5721  * @ioa_cfg:	ioa config struct
5722  * @ipr_cmd:	ipr command struct
5723  *
5724  * Return value:
5725  * 	0 on success / -1 on failure
5726  **/
5727 static int ipr_build_ioadl64(struct ipr_ioa_cfg *ioa_cfg,
5728 			     struct ipr_cmnd *ipr_cmd)
5729 {
5730 	int i, nseg;
5731 	struct scatterlist *sg;
5732 	u32 length;
5733 	u32 ioadl_flags = 0;
5734 	struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5735 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
5736 	struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ioadl64;
5737 
5738 	length = scsi_bufflen(scsi_cmd);
5739 	if (!length)
5740 		return 0;
5741 
5742 	nseg = scsi_dma_map(scsi_cmd);
5743 	if (nseg < 0) {
5744 		if (printk_ratelimit())
5745 			dev_err(&ioa_cfg->pdev->dev, "scsi_dma_map failed!\n");
5746 		return -1;
5747 	}
5748 
5749 	ipr_cmd->dma_use_sg = nseg;
5750 
5751 	ioarcb->data_transfer_length = cpu_to_be32(length);
5752 	ioarcb->ioadl_len =
5753 		cpu_to_be32(sizeof(struct ipr_ioadl64_desc) * ipr_cmd->dma_use_sg);
5754 
5755 	if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) {
5756 		ioadl_flags = IPR_IOADL_FLAGS_WRITE;
5757 		ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
5758 	} else if (scsi_cmd->sc_data_direction == DMA_FROM_DEVICE)
5759 		ioadl_flags = IPR_IOADL_FLAGS_READ;
5760 
5761 	scsi_for_each_sg(scsi_cmd, sg, ipr_cmd->dma_use_sg, i) {
5762 		ioadl64[i].flags = cpu_to_be32(ioadl_flags);
5763 		ioadl64[i].data_len = cpu_to_be32(sg_dma_len(sg));
5764 		ioadl64[i].address = cpu_to_be64(sg_dma_address(sg));
5765 	}
5766 
5767 	ioadl64[i-1].flags |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
5768 	return 0;
5769 }
5770 
5771 /**
5772  * ipr_build_ioadl - Build a scatter/gather list and map the buffer
5773  * @ioa_cfg:	ioa config struct
5774  * @ipr_cmd:	ipr command struct
5775  *
5776  * Return value:
5777  * 	0 on success / -1 on failure
5778  **/
5779 static int ipr_build_ioadl(struct ipr_ioa_cfg *ioa_cfg,
5780 			   struct ipr_cmnd *ipr_cmd)
5781 {
5782 	int i, nseg;
5783 	struct scatterlist *sg;
5784 	u32 length;
5785 	u32 ioadl_flags = 0;
5786 	struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5787 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
5788 	struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
5789 
5790 	length = scsi_bufflen(scsi_cmd);
5791 	if (!length)
5792 		return 0;
5793 
5794 	nseg = scsi_dma_map(scsi_cmd);
5795 	if (nseg < 0) {
5796 		dev_err(&ioa_cfg->pdev->dev, "scsi_dma_map failed!\n");
5797 		return -1;
5798 	}
5799 
5800 	ipr_cmd->dma_use_sg = nseg;
5801 
5802 	if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE) {
5803 		ioadl_flags = IPR_IOADL_FLAGS_WRITE;
5804 		ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
5805 		ioarcb->data_transfer_length = cpu_to_be32(length);
5806 		ioarcb->ioadl_len =
5807 			cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
5808 	} else if (scsi_cmd->sc_data_direction == DMA_FROM_DEVICE) {
5809 		ioadl_flags = IPR_IOADL_FLAGS_READ;
5810 		ioarcb->read_data_transfer_length = cpu_to_be32(length);
5811 		ioarcb->read_ioadl_len =
5812 			cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
5813 	}
5814 
5815 	if (ipr_cmd->dma_use_sg <= ARRAY_SIZE(ioarcb->u.add_data.u.ioadl)) {
5816 		ioadl = ioarcb->u.add_data.u.ioadl;
5817 		ioarcb->write_ioadl_addr = cpu_to_be32((ipr_cmd->dma_addr) +
5818 				    offsetof(struct ipr_ioarcb, u.add_data));
5819 		ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
5820 	}
5821 
5822 	scsi_for_each_sg(scsi_cmd, sg, ipr_cmd->dma_use_sg, i) {
5823 		ioadl[i].flags_and_data_len =
5824 			cpu_to_be32(ioadl_flags | sg_dma_len(sg));
5825 		ioadl[i].address = cpu_to_be32(sg_dma_address(sg));
5826 	}
5827 
5828 	ioadl[i-1].flags_and_data_len |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
5829 	return 0;
5830 }
5831 
5832 /**
5833  * ipr_erp_done - Process completion of ERP for a device
5834  * @ipr_cmd:		ipr command struct
5835  *
5836  * This function copies the sense buffer into the scsi_cmd
5837  * struct and pushes the scsi_done function.
5838  *
5839  * Return value:
5840  * 	nothing
5841  **/
5842 static void ipr_erp_done(struct ipr_cmnd *ipr_cmd)
5843 {
5844 	struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5845 	struct ipr_resource_entry *res = scsi_cmd->device->hostdata;
5846 	u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5847 
5848 	if (IPR_IOASC_SENSE_KEY(ioasc) > 0) {
5849 		scsi_cmd->result |= (DID_ERROR << 16);
5850 		scmd_printk(KERN_ERR, scsi_cmd,
5851 			    "Request Sense failed with IOASC: 0x%08X\n", ioasc);
5852 	} else {
5853 		memcpy(scsi_cmd->sense_buffer, ipr_cmd->sense_buffer,
5854 		       SCSI_SENSE_BUFFERSIZE);
5855 	}
5856 
5857 	if (res) {
5858 		if (!ipr_is_naca_model(res))
5859 			res->needs_sync_complete = 1;
5860 		res->in_erp = 0;
5861 	}
5862 	scsi_dma_unmap(ipr_cmd->scsi_cmd);
5863 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
5864 	scsi_cmd->scsi_done(scsi_cmd);
5865 }
5866 
5867 /**
5868  * ipr_reinit_ipr_cmnd_for_erp - Re-initialize a cmnd block to be used for ERP
5869  * @ipr_cmd:	ipr command struct
5870  *
5871  * Return value:
5872  * 	none
5873  **/
5874 static void ipr_reinit_ipr_cmnd_for_erp(struct ipr_cmnd *ipr_cmd)
5875 {
5876 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
5877 	struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
5878 	dma_addr_t dma_addr = ipr_cmd->dma_addr;
5879 
5880 	memset(&ioarcb->cmd_pkt, 0, sizeof(struct ipr_cmd_pkt));
5881 	ioarcb->data_transfer_length = 0;
5882 	ioarcb->read_data_transfer_length = 0;
5883 	ioarcb->ioadl_len = 0;
5884 	ioarcb->read_ioadl_len = 0;
5885 	ioasa->hdr.ioasc = 0;
5886 	ioasa->hdr.residual_data_len = 0;
5887 
5888 	if (ipr_cmd->ioa_cfg->sis64)
5889 		ioarcb->u.sis64_addr_data.data_ioadl_addr =
5890 			cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ioadl64));
5891 	else {
5892 		ioarcb->write_ioadl_addr =
5893 			cpu_to_be32(dma_addr + offsetof(struct ipr_cmnd, i.ioadl));
5894 		ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
5895 	}
5896 }
5897 
5898 /**
5899  * ipr_erp_request_sense - Send request sense to a device
5900  * @ipr_cmd:	ipr command struct
5901  *
5902  * This function sends a request sense to a device as a result
5903  * of a check condition.
5904  *
5905  * Return value:
5906  * 	nothing
5907  **/
5908 static void ipr_erp_request_sense(struct ipr_cmnd *ipr_cmd)
5909 {
5910 	struct ipr_cmd_pkt *cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
5911 	u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
5912 
5913 	if (IPR_IOASC_SENSE_KEY(ioasc) > 0) {
5914 		ipr_erp_done(ipr_cmd);
5915 		return;
5916 	}
5917 
5918 	ipr_reinit_ipr_cmnd_for_erp(ipr_cmd);
5919 
5920 	cmd_pkt->request_type = IPR_RQTYPE_SCSICDB;
5921 	cmd_pkt->cdb[0] = REQUEST_SENSE;
5922 	cmd_pkt->cdb[4] = SCSI_SENSE_BUFFERSIZE;
5923 	cmd_pkt->flags_hi |= IPR_FLAGS_HI_SYNC_OVERRIDE;
5924 	cmd_pkt->flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
5925 	cmd_pkt->timeout = cpu_to_be16(IPR_REQUEST_SENSE_TIMEOUT / HZ);
5926 
5927 	ipr_init_ioadl(ipr_cmd, ipr_cmd->sense_buffer_dma,
5928 		       SCSI_SENSE_BUFFERSIZE, IPR_IOADL_FLAGS_READ_LAST);
5929 
5930 	ipr_do_req(ipr_cmd, ipr_erp_done, ipr_timeout,
5931 		   IPR_REQUEST_SENSE_TIMEOUT * 2);
5932 }
5933 
5934 /**
5935  * ipr_erp_cancel_all - Send cancel all to a device
5936  * @ipr_cmd:	ipr command struct
5937  *
5938  * This function sends a cancel all to a device to clear the
5939  * queue. If we are running TCQ on the device, QERR is set to 1,
5940  * which means all outstanding ops have been dropped on the floor.
5941  * Cancel all will return them to us.
5942  *
5943  * Return value:
5944  * 	nothing
5945  **/
5946 static void ipr_erp_cancel_all(struct ipr_cmnd *ipr_cmd)
5947 {
5948 	struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
5949 	struct ipr_resource_entry *res = scsi_cmd->device->hostdata;
5950 	struct ipr_cmd_pkt *cmd_pkt;
5951 
5952 	res->in_erp = 1;
5953 
5954 	ipr_reinit_ipr_cmnd_for_erp(ipr_cmd);
5955 
5956 	if (!scsi_cmd->device->simple_tags) {
5957 		ipr_erp_request_sense(ipr_cmd);
5958 		return;
5959 	}
5960 
5961 	cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
5962 	cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
5963 	cmd_pkt->cdb[0] = IPR_CANCEL_ALL_REQUESTS;
5964 
5965 	ipr_do_req(ipr_cmd, ipr_erp_request_sense, ipr_timeout,
5966 		   IPR_CANCEL_ALL_TIMEOUT);
5967 }
5968 
5969 /**
5970  * ipr_dump_ioasa - Dump contents of IOASA
5971  * @ioa_cfg:	ioa config struct
5972  * @ipr_cmd:	ipr command struct
5973  * @res:		resource entry struct
5974  *
5975  * This function is invoked by the interrupt handler when ops
5976  * fail. It will log the IOASA if appropriate. Only called
5977  * for GPDD ops.
5978  *
5979  * Return value:
5980  * 	none
5981  **/
5982 static void ipr_dump_ioasa(struct ipr_ioa_cfg *ioa_cfg,
5983 			   struct ipr_cmnd *ipr_cmd, struct ipr_resource_entry *res)
5984 {
5985 	int i;
5986 	u16 data_len;
5987 	u32 ioasc, fd_ioasc;
5988 	struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
5989 	__be32 *ioasa_data = (__be32 *)ioasa;
5990 	int error_index;
5991 
5992 	ioasc = be32_to_cpu(ioasa->hdr.ioasc) & IPR_IOASC_IOASC_MASK;
5993 	fd_ioasc = be32_to_cpu(ioasa->hdr.fd_ioasc) & IPR_IOASC_IOASC_MASK;
5994 
5995 	if (0 == ioasc)
5996 		return;
5997 
5998 	if (ioa_cfg->log_level < IPR_DEFAULT_LOG_LEVEL)
5999 		return;
6000 
6001 	if (ioasc == IPR_IOASC_BUS_WAS_RESET && fd_ioasc)
6002 		error_index = ipr_get_error(fd_ioasc);
6003 	else
6004 		error_index = ipr_get_error(ioasc);
6005 
6006 	if (ioa_cfg->log_level < IPR_MAX_LOG_LEVEL) {
6007 		/* Don't log an error if the IOA already logged one */
6008 		if (ioasa->hdr.ilid != 0)
6009 			return;
6010 
6011 		if (!ipr_is_gscsi(res))
6012 			return;
6013 
6014 		if (ipr_error_table[error_index].log_ioasa == 0)
6015 			return;
6016 	}
6017 
6018 	ipr_res_err(ioa_cfg, res, "%s\n", ipr_error_table[error_index].error);
6019 
6020 	data_len = be16_to_cpu(ioasa->hdr.ret_stat_len);
6021 	if (ioa_cfg->sis64 && sizeof(struct ipr_ioasa64) < data_len)
6022 		data_len = sizeof(struct ipr_ioasa64);
6023 	else if (!ioa_cfg->sis64 && sizeof(struct ipr_ioasa) < data_len)
6024 		data_len = sizeof(struct ipr_ioasa);
6025 
6026 	ipr_err("IOASA Dump:\n");
6027 
6028 	for (i = 0; i < data_len / 4; i += 4) {
6029 		ipr_err("%08X: %08X %08X %08X %08X\n", i*4,
6030 			be32_to_cpu(ioasa_data[i]),
6031 			be32_to_cpu(ioasa_data[i+1]),
6032 			be32_to_cpu(ioasa_data[i+2]),
6033 			be32_to_cpu(ioasa_data[i+3]));
6034 	}
6035 }
6036 
6037 /**
6038  * ipr_gen_sense - Generate SCSI sense data from an IOASA
6039  * @ioasa:		IOASA
6040  * @sense_buf:	sense data buffer
6041  *
6042  * Return value:
6043  * 	none
6044  **/
6045 static void ipr_gen_sense(struct ipr_cmnd *ipr_cmd)
6046 {
6047 	u32 failing_lba;
6048 	u8 *sense_buf = ipr_cmd->scsi_cmd->sense_buffer;
6049 	struct ipr_resource_entry *res = ipr_cmd->scsi_cmd->device->hostdata;
6050 	struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
6051 	u32 ioasc = be32_to_cpu(ioasa->hdr.ioasc);
6052 
6053 	memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
6054 
6055 	if (ioasc >= IPR_FIRST_DRIVER_IOASC)
6056 		return;
6057 
6058 	ipr_cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
6059 
6060 	if (ipr_is_vset_device(res) &&
6061 	    ioasc == IPR_IOASC_MED_DO_NOT_REALLOC &&
6062 	    ioasa->u.vset.failing_lba_hi != 0) {
6063 		sense_buf[0] = 0x72;
6064 		sense_buf[1] = IPR_IOASC_SENSE_KEY(ioasc);
6065 		sense_buf[2] = IPR_IOASC_SENSE_CODE(ioasc);
6066 		sense_buf[3] = IPR_IOASC_SENSE_QUAL(ioasc);
6067 
6068 		sense_buf[7] = 12;
6069 		sense_buf[8] = 0;
6070 		sense_buf[9] = 0x0A;
6071 		sense_buf[10] = 0x80;
6072 
6073 		failing_lba = be32_to_cpu(ioasa->u.vset.failing_lba_hi);
6074 
6075 		sense_buf[12] = (failing_lba & 0xff000000) >> 24;
6076 		sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
6077 		sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
6078 		sense_buf[15] = failing_lba & 0x000000ff;
6079 
6080 		failing_lba = be32_to_cpu(ioasa->u.vset.failing_lba_lo);
6081 
6082 		sense_buf[16] = (failing_lba & 0xff000000) >> 24;
6083 		sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
6084 		sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
6085 		sense_buf[19] = failing_lba & 0x000000ff;
6086 	} else {
6087 		sense_buf[0] = 0x70;
6088 		sense_buf[2] = IPR_IOASC_SENSE_KEY(ioasc);
6089 		sense_buf[12] = IPR_IOASC_SENSE_CODE(ioasc);
6090 		sense_buf[13] = IPR_IOASC_SENSE_QUAL(ioasc);
6091 
6092 		/* Illegal request */
6093 		if ((IPR_IOASC_SENSE_KEY(ioasc) == 0x05) &&
6094 		    (be32_to_cpu(ioasa->hdr.ioasc_specific) & IPR_FIELD_POINTER_VALID)) {
6095 			sense_buf[7] = 10;	/* additional length */
6096 
6097 			/* IOARCB was in error */
6098 			if (IPR_IOASC_SENSE_CODE(ioasc) == 0x24)
6099 				sense_buf[15] = 0xC0;
6100 			else	/* Parameter data was invalid */
6101 				sense_buf[15] = 0x80;
6102 
6103 			sense_buf[16] =
6104 			    ((IPR_FIELD_POINTER_MASK &
6105 			      be32_to_cpu(ioasa->hdr.ioasc_specific)) >> 8) & 0xff;
6106 			sense_buf[17] =
6107 			    (IPR_FIELD_POINTER_MASK &
6108 			     be32_to_cpu(ioasa->hdr.ioasc_specific)) & 0xff;
6109 		} else {
6110 			if (ioasc == IPR_IOASC_MED_DO_NOT_REALLOC) {
6111 				if (ipr_is_vset_device(res))
6112 					failing_lba = be32_to_cpu(ioasa->u.vset.failing_lba_lo);
6113 				else
6114 					failing_lba = be32_to_cpu(ioasa->u.dasd.failing_lba);
6115 
6116 				sense_buf[0] |= 0x80;	/* Or in the Valid bit */
6117 				sense_buf[3] = (failing_lba & 0xff000000) >> 24;
6118 				sense_buf[4] = (failing_lba & 0x00ff0000) >> 16;
6119 				sense_buf[5] = (failing_lba & 0x0000ff00) >> 8;
6120 				sense_buf[6] = failing_lba & 0x000000ff;
6121 			}
6122 
6123 			sense_buf[7] = 6;	/* additional length */
6124 		}
6125 	}
6126 }
6127 
6128 /**
6129  * ipr_get_autosense - Copy autosense data to sense buffer
6130  * @ipr_cmd:	ipr command struct
6131  *
6132  * This function copies the autosense buffer to the buffer
6133  * in the scsi_cmd, if there is autosense available.
6134  *
6135  * Return value:
6136  *	1 if autosense was available / 0 if not
6137  **/
6138 static int ipr_get_autosense(struct ipr_cmnd *ipr_cmd)
6139 {
6140 	struct ipr_ioasa *ioasa = &ipr_cmd->s.ioasa;
6141 	struct ipr_ioasa64 *ioasa64 = &ipr_cmd->s.ioasa64;
6142 
6143 	if ((be32_to_cpu(ioasa->hdr.ioasc_specific) & IPR_AUTOSENSE_VALID) == 0)
6144 		return 0;
6145 
6146 	if (ipr_cmd->ioa_cfg->sis64)
6147 		memcpy(ipr_cmd->scsi_cmd->sense_buffer, ioasa64->auto_sense.data,
6148 		       min_t(u16, be16_to_cpu(ioasa64->auto_sense.auto_sense_len),
6149 			   SCSI_SENSE_BUFFERSIZE));
6150 	else
6151 		memcpy(ipr_cmd->scsi_cmd->sense_buffer, ioasa->auto_sense.data,
6152 		       min_t(u16, be16_to_cpu(ioasa->auto_sense.auto_sense_len),
6153 			   SCSI_SENSE_BUFFERSIZE));
6154 	return 1;
6155 }
6156 
6157 /**
6158  * ipr_erp_start - Process an error response for a SCSI op
6159  * @ioa_cfg:	ioa config struct
6160  * @ipr_cmd:	ipr command struct
6161  *
6162  * This function determines whether or not to initiate ERP
6163  * on the affected device.
6164  *
6165  * Return value:
6166  * 	nothing
6167  **/
6168 static void ipr_erp_start(struct ipr_ioa_cfg *ioa_cfg,
6169 			      struct ipr_cmnd *ipr_cmd)
6170 {
6171 	struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
6172 	struct ipr_resource_entry *res = scsi_cmd->device->hostdata;
6173 	u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
6174 	u32 masked_ioasc = ioasc & IPR_IOASC_IOASC_MASK;
6175 
6176 	if (!res) {
6177 		ipr_scsi_eh_done(ipr_cmd);
6178 		return;
6179 	}
6180 
6181 	if (!ipr_is_gscsi(res) && masked_ioasc != IPR_IOASC_HW_DEV_BUS_STATUS)
6182 		ipr_gen_sense(ipr_cmd);
6183 
6184 	ipr_dump_ioasa(ioa_cfg, ipr_cmd, res);
6185 
6186 	switch (masked_ioasc) {
6187 	case IPR_IOASC_ABORTED_CMD_TERM_BY_HOST:
6188 		if (ipr_is_naca_model(res))
6189 			scsi_cmd->result |= (DID_ABORT << 16);
6190 		else
6191 			scsi_cmd->result |= (DID_IMM_RETRY << 16);
6192 		break;
6193 	case IPR_IOASC_IR_RESOURCE_HANDLE:
6194 	case IPR_IOASC_IR_NO_CMDS_TO_2ND_IOA:
6195 		scsi_cmd->result |= (DID_NO_CONNECT << 16);
6196 		break;
6197 	case IPR_IOASC_HW_SEL_TIMEOUT:
6198 		scsi_cmd->result |= (DID_NO_CONNECT << 16);
6199 		if (!ipr_is_naca_model(res))
6200 			res->needs_sync_complete = 1;
6201 		break;
6202 	case IPR_IOASC_SYNC_REQUIRED:
6203 		if (!res->in_erp)
6204 			res->needs_sync_complete = 1;
6205 		scsi_cmd->result |= (DID_IMM_RETRY << 16);
6206 		break;
6207 	case IPR_IOASC_MED_DO_NOT_REALLOC: /* prevent retries */
6208 	case IPR_IOASA_IR_DUAL_IOA_DISABLED:
6209 		scsi_cmd->result |= (DID_PASSTHROUGH << 16);
6210 		break;
6211 	case IPR_IOASC_BUS_WAS_RESET:
6212 	case IPR_IOASC_BUS_WAS_RESET_BY_OTHER:
6213 		/*
6214 		 * Report the bus reset and ask for a retry. The device
6215 		 * will give CC/UA the next command.
6216 		 */
6217 		if (!res->resetting_device)
6218 			scsi_report_bus_reset(ioa_cfg->host, scsi_cmd->device->channel);
6219 		scsi_cmd->result |= (DID_ERROR << 16);
6220 		if (!ipr_is_naca_model(res))
6221 			res->needs_sync_complete = 1;
6222 		break;
6223 	case IPR_IOASC_HW_DEV_BUS_STATUS:
6224 		scsi_cmd->result |= IPR_IOASC_SENSE_STATUS(ioasc);
6225 		if (IPR_IOASC_SENSE_STATUS(ioasc) == SAM_STAT_CHECK_CONDITION) {
6226 			if (!ipr_get_autosense(ipr_cmd)) {
6227 				if (!ipr_is_naca_model(res)) {
6228 					ipr_erp_cancel_all(ipr_cmd);
6229 					return;
6230 				}
6231 			}
6232 		}
6233 		if (!ipr_is_naca_model(res))
6234 			res->needs_sync_complete = 1;
6235 		break;
6236 	case IPR_IOASC_NR_INIT_CMD_REQUIRED:
6237 		break;
6238 	case IPR_IOASC_IR_NON_OPTIMIZED:
6239 		if (res->raw_mode) {
6240 			res->raw_mode = 0;
6241 			scsi_cmd->result |= (DID_IMM_RETRY << 16);
6242 		} else
6243 			scsi_cmd->result |= (DID_ERROR << 16);
6244 		break;
6245 	default:
6246 		if (IPR_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
6247 			scsi_cmd->result |= (DID_ERROR << 16);
6248 		if (!ipr_is_vset_device(res) && !ipr_is_naca_model(res))
6249 			res->needs_sync_complete = 1;
6250 		break;
6251 	}
6252 
6253 	scsi_dma_unmap(ipr_cmd->scsi_cmd);
6254 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6255 	scsi_cmd->scsi_done(scsi_cmd);
6256 }
6257 
6258 /**
6259  * ipr_scsi_done - mid-layer done function
6260  * @ipr_cmd:	ipr command struct
6261  *
6262  * This function is invoked by the interrupt handler for
6263  * ops generated by the SCSI mid-layer
6264  *
6265  * Return value:
6266  * 	none
6267  **/
6268 static void ipr_scsi_done(struct ipr_cmnd *ipr_cmd)
6269 {
6270 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6271 	struct scsi_cmnd *scsi_cmd = ipr_cmd->scsi_cmd;
6272 	u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
6273 	unsigned long lock_flags;
6274 
6275 	scsi_set_resid(scsi_cmd, be32_to_cpu(ipr_cmd->s.ioasa.hdr.residual_data_len));
6276 
6277 	if (likely(IPR_IOASC_SENSE_KEY(ioasc) == 0)) {
6278 		scsi_dma_unmap(scsi_cmd);
6279 
6280 		spin_lock_irqsave(ipr_cmd->hrrq->lock, lock_flags);
6281 		list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6282 		scsi_cmd->scsi_done(scsi_cmd);
6283 		spin_unlock_irqrestore(ipr_cmd->hrrq->lock, lock_flags);
6284 	} else {
6285 		spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
6286 		spin_lock(&ipr_cmd->hrrq->_lock);
6287 		ipr_erp_start(ioa_cfg, ipr_cmd);
6288 		spin_unlock(&ipr_cmd->hrrq->_lock);
6289 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
6290 	}
6291 }
6292 
6293 /**
6294  * ipr_queuecommand - Queue a mid-layer request
6295  * @shost:		scsi host struct
6296  * @scsi_cmd:	scsi command struct
6297  *
6298  * This function queues a request generated by the mid-layer.
6299  *
6300  * Return value:
6301  *	0 on success
6302  *	SCSI_MLQUEUE_DEVICE_BUSY if device is busy
6303  *	SCSI_MLQUEUE_HOST_BUSY if host is busy
6304  **/
6305 static int ipr_queuecommand(struct Scsi_Host *shost,
6306 			    struct scsi_cmnd *scsi_cmd)
6307 {
6308 	struct ipr_ioa_cfg *ioa_cfg;
6309 	struct ipr_resource_entry *res;
6310 	struct ipr_ioarcb *ioarcb;
6311 	struct ipr_cmnd *ipr_cmd;
6312 	unsigned long hrrq_flags, lock_flags;
6313 	int rc;
6314 	struct ipr_hrr_queue *hrrq;
6315 	int hrrq_id;
6316 
6317 	ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
6318 
6319 	scsi_cmd->result = (DID_OK << 16);
6320 	res = scsi_cmd->device->hostdata;
6321 
6322 	if (ipr_is_gata(res) && res->sata_port) {
6323 		spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
6324 		rc = ata_sas_queuecmd(scsi_cmd, res->sata_port->ap);
6325 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
6326 		return rc;
6327 	}
6328 
6329 	hrrq_id = ipr_get_hrrq_index(ioa_cfg);
6330 	hrrq = &ioa_cfg->hrrq[hrrq_id];
6331 
6332 	spin_lock_irqsave(hrrq->lock, hrrq_flags);
6333 	/*
6334 	 * We are currently blocking all devices due to a host reset
6335 	 * We have told the host to stop giving us new requests, but
6336 	 * ERP ops don't count. FIXME
6337 	 */
6338 	if (unlikely(!hrrq->allow_cmds && !hrrq->ioa_is_dead && !hrrq->removing_ioa)) {
6339 		spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6340 		return SCSI_MLQUEUE_HOST_BUSY;
6341 	}
6342 
6343 	/*
6344 	 * FIXME - Create scsi_set_host_offline interface
6345 	 *  and the ioa_is_dead check can be removed
6346 	 */
6347 	if (unlikely(hrrq->ioa_is_dead || hrrq->removing_ioa || !res)) {
6348 		spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6349 		goto err_nodev;
6350 	}
6351 
6352 	ipr_cmd = __ipr_get_free_ipr_cmnd(hrrq);
6353 	if (ipr_cmd == NULL) {
6354 		spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6355 		return SCSI_MLQUEUE_HOST_BUSY;
6356 	}
6357 	spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6358 
6359 	ipr_init_ipr_cmnd(ipr_cmd, ipr_scsi_done);
6360 	ioarcb = &ipr_cmd->ioarcb;
6361 
6362 	memcpy(ioarcb->cmd_pkt.cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
6363 	ipr_cmd->scsi_cmd = scsi_cmd;
6364 	ipr_cmd->done = ipr_scsi_eh_done;
6365 
6366 	if (ipr_is_gscsi(res) || ipr_is_vset_device(res)) {
6367 		if (scsi_cmd->underflow == 0)
6368 			ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
6369 
6370 		ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_LINK_DESC;
6371 		if (ipr_is_gscsi(res) && res->reset_occurred) {
6372 			res->reset_occurred = 0;
6373 			ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_DELAY_AFTER_RST;
6374 		}
6375 		ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_ALIGNED_BFR;
6376 		if (scsi_cmd->flags & SCMD_TAGGED)
6377 			ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_SIMPLE_TASK;
6378 		else
6379 			ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_UNTAGGED_TASK;
6380 	}
6381 
6382 	if (scsi_cmd->cmnd[0] >= 0xC0 &&
6383 	    (!ipr_is_gscsi(res) || scsi_cmd->cmnd[0] == IPR_QUERY_RSRC_STATE)) {
6384 		ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
6385 	}
6386 	if (res->raw_mode && ipr_is_af_dasd_device(res))
6387 		ioarcb->cmd_pkt.request_type = IPR_RQTYPE_PIPE;
6388 
6389 	if (ioa_cfg->sis64)
6390 		rc = ipr_build_ioadl64(ioa_cfg, ipr_cmd);
6391 	else
6392 		rc = ipr_build_ioadl(ioa_cfg, ipr_cmd);
6393 
6394 	spin_lock_irqsave(hrrq->lock, hrrq_flags);
6395 	if (unlikely(rc || (!hrrq->allow_cmds && !hrrq->ioa_is_dead))) {
6396 		list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_free_q);
6397 		spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6398 		if (!rc)
6399 			scsi_dma_unmap(scsi_cmd);
6400 		return SCSI_MLQUEUE_HOST_BUSY;
6401 	}
6402 
6403 	if (unlikely(hrrq->ioa_is_dead)) {
6404 		list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_free_q);
6405 		spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6406 		scsi_dma_unmap(scsi_cmd);
6407 		goto err_nodev;
6408 	}
6409 
6410 	ioarcb->res_handle = res->res_handle;
6411 	if (res->needs_sync_complete) {
6412 		ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_SYNC_COMPLETE;
6413 		res->needs_sync_complete = 0;
6414 	}
6415 	list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_pending_q);
6416 	ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_GET_RES_PHYS_LOC(res));
6417 	ipr_send_command(ipr_cmd);
6418 	spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6419 	return 0;
6420 
6421 err_nodev:
6422 	spin_lock_irqsave(hrrq->lock, hrrq_flags);
6423 	memset(scsi_cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
6424 	scsi_cmd->result = (DID_NO_CONNECT << 16);
6425 	scsi_cmd->scsi_done(scsi_cmd);
6426 	spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
6427 	return 0;
6428 }
6429 
6430 /**
6431  * ipr_ioctl - IOCTL handler
6432  * @sdev:	scsi device struct
6433  * @cmd:	IOCTL cmd
6434  * @arg:	IOCTL arg
6435  *
6436  * Return value:
6437  * 	0 on success / other on failure
6438  **/
6439 static int ipr_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
6440 {
6441 	struct ipr_resource_entry *res;
6442 
6443 	res = (struct ipr_resource_entry *)sdev->hostdata;
6444 	if (res && ipr_is_gata(res)) {
6445 		if (cmd == HDIO_GET_IDENTITY)
6446 			return -ENOTTY;
6447 		return ata_sas_scsi_ioctl(res->sata_port->ap, sdev, cmd, arg);
6448 	}
6449 
6450 	return -EINVAL;
6451 }
6452 
6453 /**
6454  * ipr_info - Get information about the card/driver
6455  * @scsi_host:	scsi host struct
6456  *
6457  * Return value:
6458  * 	pointer to buffer with description string
6459  **/
6460 static const char *ipr_ioa_info(struct Scsi_Host *host)
6461 {
6462 	static char buffer[512];
6463 	struct ipr_ioa_cfg *ioa_cfg;
6464 	unsigned long lock_flags = 0;
6465 
6466 	ioa_cfg = (struct ipr_ioa_cfg *) host->hostdata;
6467 
6468 	spin_lock_irqsave(host->host_lock, lock_flags);
6469 	sprintf(buffer, "IBM %X Storage Adapter", ioa_cfg->type);
6470 	spin_unlock_irqrestore(host->host_lock, lock_flags);
6471 
6472 	return buffer;
6473 }
6474 
6475 static struct scsi_host_template driver_template = {
6476 	.module = THIS_MODULE,
6477 	.name = "IPR",
6478 	.info = ipr_ioa_info,
6479 	.ioctl = ipr_ioctl,
6480 	.queuecommand = ipr_queuecommand,
6481 	.eh_abort_handler = ipr_eh_abort,
6482 	.eh_device_reset_handler = ipr_eh_dev_reset,
6483 	.eh_host_reset_handler = ipr_eh_host_reset,
6484 	.slave_alloc = ipr_slave_alloc,
6485 	.slave_configure = ipr_slave_configure,
6486 	.slave_destroy = ipr_slave_destroy,
6487 	.scan_finished = ipr_scan_finished,
6488 	.target_alloc = ipr_target_alloc,
6489 	.target_destroy = ipr_target_destroy,
6490 	.change_queue_depth = ipr_change_queue_depth,
6491 	.bios_param = ipr_biosparam,
6492 	.can_queue = IPR_MAX_COMMANDS,
6493 	.this_id = -1,
6494 	.sg_tablesize = IPR_MAX_SGLIST,
6495 	.max_sectors = IPR_IOA_MAX_SECTORS,
6496 	.cmd_per_lun = IPR_MAX_CMD_PER_LUN,
6497 	.use_clustering = ENABLE_CLUSTERING,
6498 	.shost_attrs = ipr_ioa_attrs,
6499 	.sdev_attrs = ipr_dev_attrs,
6500 	.proc_name = IPR_NAME,
6501 	.use_blk_tags = 1,
6502 };
6503 
6504 /**
6505  * ipr_ata_phy_reset - libata phy_reset handler
6506  * @ap:		ata port to reset
6507  *
6508  **/
6509 static void ipr_ata_phy_reset(struct ata_port *ap)
6510 {
6511 	unsigned long flags;
6512 	struct ipr_sata_port *sata_port = ap->private_data;
6513 	struct ipr_resource_entry *res = sata_port->res;
6514 	struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6515 	int rc;
6516 
6517 	ENTER;
6518 	spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6519 	while (ioa_cfg->in_reset_reload) {
6520 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6521 		wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
6522 		spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6523 	}
6524 
6525 	if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds)
6526 		goto out_unlock;
6527 
6528 	rc = ipr_device_reset(ioa_cfg, res);
6529 
6530 	if (rc) {
6531 		ap->link.device[0].class = ATA_DEV_NONE;
6532 		goto out_unlock;
6533 	}
6534 
6535 	ap->link.device[0].class = res->ata_class;
6536 	if (ap->link.device[0].class == ATA_DEV_UNKNOWN)
6537 		ap->link.device[0].class = ATA_DEV_NONE;
6538 
6539 out_unlock:
6540 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6541 	LEAVE;
6542 }
6543 
6544 /**
6545  * ipr_ata_post_internal - Cleanup after an internal command
6546  * @qc:	ATA queued command
6547  *
6548  * Return value:
6549  * 	none
6550  **/
6551 static void ipr_ata_post_internal(struct ata_queued_cmd *qc)
6552 {
6553 	struct ipr_sata_port *sata_port = qc->ap->private_data;
6554 	struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6555 	struct ipr_cmnd *ipr_cmd;
6556 	struct ipr_hrr_queue *hrrq;
6557 	unsigned long flags;
6558 
6559 	spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6560 	while (ioa_cfg->in_reset_reload) {
6561 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6562 		wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
6563 		spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
6564 	}
6565 
6566 	for_each_hrrq(hrrq, ioa_cfg) {
6567 		spin_lock(&hrrq->_lock);
6568 		list_for_each_entry(ipr_cmd, &hrrq->hrrq_pending_q, queue) {
6569 			if (ipr_cmd->qc == qc) {
6570 				ipr_device_reset(ioa_cfg, sata_port->res);
6571 				break;
6572 			}
6573 		}
6574 		spin_unlock(&hrrq->_lock);
6575 	}
6576 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
6577 }
6578 
6579 /**
6580  * ipr_copy_sata_tf - Copy a SATA taskfile to an IOA data structure
6581  * @regs:	destination
6582  * @tf:	source ATA taskfile
6583  *
6584  * Return value:
6585  * 	none
6586  **/
6587 static void ipr_copy_sata_tf(struct ipr_ioarcb_ata_regs *regs,
6588 			     struct ata_taskfile *tf)
6589 {
6590 	regs->feature = tf->feature;
6591 	regs->nsect = tf->nsect;
6592 	regs->lbal = tf->lbal;
6593 	regs->lbam = tf->lbam;
6594 	regs->lbah = tf->lbah;
6595 	regs->device = tf->device;
6596 	regs->command = tf->command;
6597 	regs->hob_feature = tf->hob_feature;
6598 	regs->hob_nsect = tf->hob_nsect;
6599 	regs->hob_lbal = tf->hob_lbal;
6600 	regs->hob_lbam = tf->hob_lbam;
6601 	regs->hob_lbah = tf->hob_lbah;
6602 	regs->ctl = tf->ctl;
6603 }
6604 
6605 /**
6606  * ipr_sata_done - done function for SATA commands
6607  * @ipr_cmd:	ipr command struct
6608  *
6609  * This function is invoked by the interrupt handler for
6610  * ops generated by the SCSI mid-layer to SATA devices
6611  *
6612  * Return value:
6613  * 	none
6614  **/
6615 static void ipr_sata_done(struct ipr_cmnd *ipr_cmd)
6616 {
6617 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6618 	struct ata_queued_cmd *qc = ipr_cmd->qc;
6619 	struct ipr_sata_port *sata_port = qc->ap->private_data;
6620 	struct ipr_resource_entry *res = sata_port->res;
6621 	u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
6622 
6623 	spin_lock(&ipr_cmd->hrrq->_lock);
6624 	if (ipr_cmd->ioa_cfg->sis64)
6625 		memcpy(&sata_port->ioasa, &ipr_cmd->s.ioasa64.u.gata,
6626 		       sizeof(struct ipr_ioasa_gata));
6627 	else
6628 		memcpy(&sata_port->ioasa, &ipr_cmd->s.ioasa.u.gata,
6629 		       sizeof(struct ipr_ioasa_gata));
6630 	ipr_dump_ioasa(ioa_cfg, ipr_cmd, res);
6631 
6632 	if (be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc_specific) & IPR_ATA_DEVICE_WAS_RESET)
6633 		scsi_report_device_reset(ioa_cfg->host, res->bus, res->target);
6634 
6635 	if (IPR_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
6636 		qc->err_mask |= __ac_err_mask(sata_port->ioasa.status);
6637 	else
6638 		qc->err_mask |= ac_err_mask(sata_port->ioasa.status);
6639 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6640 	spin_unlock(&ipr_cmd->hrrq->_lock);
6641 	ata_qc_complete(qc);
6642 }
6643 
6644 /**
6645  * ipr_build_ata_ioadl64 - Build an ATA scatter/gather list
6646  * @ipr_cmd:	ipr command struct
6647  * @qc:		ATA queued command
6648  *
6649  **/
6650 static void ipr_build_ata_ioadl64(struct ipr_cmnd *ipr_cmd,
6651 				  struct ata_queued_cmd *qc)
6652 {
6653 	u32 ioadl_flags = 0;
6654 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
6655 	struct ipr_ioadl64_desc *ioadl64 = ipr_cmd->i.ata_ioadl.ioadl64;
6656 	struct ipr_ioadl64_desc *last_ioadl64 = NULL;
6657 	int len = qc->nbytes;
6658 	struct scatterlist *sg;
6659 	unsigned int si;
6660 	dma_addr_t dma_addr = ipr_cmd->dma_addr;
6661 
6662 	if (len == 0)
6663 		return;
6664 
6665 	if (qc->dma_dir == DMA_TO_DEVICE) {
6666 		ioadl_flags = IPR_IOADL_FLAGS_WRITE;
6667 		ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
6668 	} else if (qc->dma_dir == DMA_FROM_DEVICE)
6669 		ioadl_flags = IPR_IOADL_FLAGS_READ;
6670 
6671 	ioarcb->data_transfer_length = cpu_to_be32(len);
6672 	ioarcb->ioadl_len =
6673 		cpu_to_be32(sizeof(struct ipr_ioadl64_desc) * ipr_cmd->dma_use_sg);
6674 	ioarcb->u.sis64_addr_data.data_ioadl_addr =
6675 		cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ata_ioadl.ioadl64));
6676 
6677 	for_each_sg(qc->sg, sg, qc->n_elem, si) {
6678 		ioadl64->flags = cpu_to_be32(ioadl_flags);
6679 		ioadl64->data_len = cpu_to_be32(sg_dma_len(sg));
6680 		ioadl64->address = cpu_to_be64(sg_dma_address(sg));
6681 
6682 		last_ioadl64 = ioadl64;
6683 		ioadl64++;
6684 	}
6685 
6686 	if (likely(last_ioadl64))
6687 		last_ioadl64->flags |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
6688 }
6689 
6690 /**
6691  * ipr_build_ata_ioadl - Build an ATA scatter/gather list
6692  * @ipr_cmd:	ipr command struct
6693  * @qc:		ATA queued command
6694  *
6695  **/
6696 static void ipr_build_ata_ioadl(struct ipr_cmnd *ipr_cmd,
6697 				struct ata_queued_cmd *qc)
6698 {
6699 	u32 ioadl_flags = 0;
6700 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
6701 	struct ipr_ioadl_desc *ioadl = ipr_cmd->i.ioadl;
6702 	struct ipr_ioadl_desc *last_ioadl = NULL;
6703 	int len = qc->nbytes;
6704 	struct scatterlist *sg;
6705 	unsigned int si;
6706 
6707 	if (len == 0)
6708 		return;
6709 
6710 	if (qc->dma_dir == DMA_TO_DEVICE) {
6711 		ioadl_flags = IPR_IOADL_FLAGS_WRITE;
6712 		ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
6713 		ioarcb->data_transfer_length = cpu_to_be32(len);
6714 		ioarcb->ioadl_len =
6715 			cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
6716 	} else if (qc->dma_dir == DMA_FROM_DEVICE) {
6717 		ioadl_flags = IPR_IOADL_FLAGS_READ;
6718 		ioarcb->read_data_transfer_length = cpu_to_be32(len);
6719 		ioarcb->read_ioadl_len =
6720 			cpu_to_be32(sizeof(struct ipr_ioadl_desc) * ipr_cmd->dma_use_sg);
6721 	}
6722 
6723 	for_each_sg(qc->sg, sg, qc->n_elem, si) {
6724 		ioadl->flags_and_data_len = cpu_to_be32(ioadl_flags | sg_dma_len(sg));
6725 		ioadl->address = cpu_to_be32(sg_dma_address(sg));
6726 
6727 		last_ioadl = ioadl;
6728 		ioadl++;
6729 	}
6730 
6731 	if (likely(last_ioadl))
6732 		last_ioadl->flags_and_data_len |= cpu_to_be32(IPR_IOADL_FLAGS_LAST);
6733 }
6734 
6735 /**
6736  * ipr_qc_defer - Get a free ipr_cmd
6737  * @qc:	queued command
6738  *
6739  * Return value:
6740  *	0 if success
6741  **/
6742 static int ipr_qc_defer(struct ata_queued_cmd *qc)
6743 {
6744 	struct ata_port *ap = qc->ap;
6745 	struct ipr_sata_port *sata_port = ap->private_data;
6746 	struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6747 	struct ipr_cmnd *ipr_cmd;
6748 	struct ipr_hrr_queue *hrrq;
6749 	int hrrq_id;
6750 
6751 	hrrq_id = ipr_get_hrrq_index(ioa_cfg);
6752 	hrrq = &ioa_cfg->hrrq[hrrq_id];
6753 
6754 	qc->lldd_task = NULL;
6755 	spin_lock(&hrrq->_lock);
6756 	if (unlikely(hrrq->ioa_is_dead)) {
6757 		spin_unlock(&hrrq->_lock);
6758 		return 0;
6759 	}
6760 
6761 	if (unlikely(!hrrq->allow_cmds)) {
6762 		spin_unlock(&hrrq->_lock);
6763 		return ATA_DEFER_LINK;
6764 	}
6765 
6766 	ipr_cmd = __ipr_get_free_ipr_cmnd(hrrq);
6767 	if (ipr_cmd == NULL) {
6768 		spin_unlock(&hrrq->_lock);
6769 		return ATA_DEFER_LINK;
6770 	}
6771 
6772 	qc->lldd_task = ipr_cmd;
6773 	spin_unlock(&hrrq->_lock);
6774 	return 0;
6775 }
6776 
6777 /**
6778  * ipr_qc_issue - Issue a SATA qc to a device
6779  * @qc:	queued command
6780  *
6781  * Return value:
6782  * 	0 if success
6783  **/
6784 static unsigned int ipr_qc_issue(struct ata_queued_cmd *qc)
6785 {
6786 	struct ata_port *ap = qc->ap;
6787 	struct ipr_sata_port *sata_port = ap->private_data;
6788 	struct ipr_resource_entry *res = sata_port->res;
6789 	struct ipr_ioa_cfg *ioa_cfg = sata_port->ioa_cfg;
6790 	struct ipr_cmnd *ipr_cmd;
6791 	struct ipr_ioarcb *ioarcb;
6792 	struct ipr_ioarcb_ata_regs *regs;
6793 
6794 	if (qc->lldd_task == NULL)
6795 		ipr_qc_defer(qc);
6796 
6797 	ipr_cmd = qc->lldd_task;
6798 	if (ipr_cmd == NULL)
6799 		return AC_ERR_SYSTEM;
6800 
6801 	qc->lldd_task = NULL;
6802 	spin_lock(&ipr_cmd->hrrq->_lock);
6803 	if (unlikely(!ipr_cmd->hrrq->allow_cmds ||
6804 			ipr_cmd->hrrq->ioa_is_dead)) {
6805 		list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6806 		spin_unlock(&ipr_cmd->hrrq->_lock);
6807 		return AC_ERR_SYSTEM;
6808 	}
6809 
6810 	ipr_init_ipr_cmnd(ipr_cmd, ipr_lock_and_done);
6811 	ioarcb = &ipr_cmd->ioarcb;
6812 
6813 	if (ioa_cfg->sis64) {
6814 		regs = &ipr_cmd->i.ata_ioadl.regs;
6815 		ioarcb->add_cmd_parms_offset = cpu_to_be16(sizeof(*ioarcb));
6816 	} else
6817 		regs = &ioarcb->u.add_data.u.regs;
6818 
6819 	memset(regs, 0, sizeof(*regs));
6820 	ioarcb->add_cmd_parms_len = cpu_to_be16(sizeof(*regs));
6821 
6822 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
6823 	ipr_cmd->qc = qc;
6824 	ipr_cmd->done = ipr_sata_done;
6825 	ipr_cmd->ioarcb.res_handle = res->res_handle;
6826 	ioarcb->cmd_pkt.request_type = IPR_RQTYPE_ATA_PASSTHRU;
6827 	ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_LINK_DESC;
6828 	ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
6829 	ipr_cmd->dma_use_sg = qc->n_elem;
6830 
6831 	if (ioa_cfg->sis64)
6832 		ipr_build_ata_ioadl64(ipr_cmd, qc);
6833 	else
6834 		ipr_build_ata_ioadl(ipr_cmd, qc);
6835 
6836 	regs->flags |= IPR_ATA_FLAG_STATUS_ON_GOOD_COMPLETION;
6837 	ipr_copy_sata_tf(regs, &qc->tf);
6838 	memcpy(ioarcb->cmd_pkt.cdb, qc->cdb, IPR_MAX_CDB_LEN);
6839 	ipr_trc_hook(ipr_cmd, IPR_TRACE_START, IPR_GET_RES_PHYS_LOC(res));
6840 
6841 	switch (qc->tf.protocol) {
6842 	case ATA_PROT_NODATA:
6843 	case ATA_PROT_PIO:
6844 		break;
6845 
6846 	case ATA_PROT_DMA:
6847 		regs->flags |= IPR_ATA_FLAG_XFER_TYPE_DMA;
6848 		break;
6849 
6850 	case ATAPI_PROT_PIO:
6851 	case ATAPI_PROT_NODATA:
6852 		regs->flags |= IPR_ATA_FLAG_PACKET_CMD;
6853 		break;
6854 
6855 	case ATAPI_PROT_DMA:
6856 		regs->flags |= IPR_ATA_FLAG_PACKET_CMD;
6857 		regs->flags |= IPR_ATA_FLAG_XFER_TYPE_DMA;
6858 		break;
6859 
6860 	default:
6861 		WARN_ON(1);
6862 		spin_unlock(&ipr_cmd->hrrq->_lock);
6863 		return AC_ERR_INVALID;
6864 	}
6865 
6866 	ipr_send_command(ipr_cmd);
6867 	spin_unlock(&ipr_cmd->hrrq->_lock);
6868 
6869 	return 0;
6870 }
6871 
6872 /**
6873  * ipr_qc_fill_rtf - Read result TF
6874  * @qc: ATA queued command
6875  *
6876  * Return value:
6877  * 	true
6878  **/
6879 static bool ipr_qc_fill_rtf(struct ata_queued_cmd *qc)
6880 {
6881 	struct ipr_sata_port *sata_port = qc->ap->private_data;
6882 	struct ipr_ioasa_gata *g = &sata_port->ioasa;
6883 	struct ata_taskfile *tf = &qc->result_tf;
6884 
6885 	tf->feature = g->error;
6886 	tf->nsect = g->nsect;
6887 	tf->lbal = g->lbal;
6888 	tf->lbam = g->lbam;
6889 	tf->lbah = g->lbah;
6890 	tf->device = g->device;
6891 	tf->command = g->status;
6892 	tf->hob_nsect = g->hob_nsect;
6893 	tf->hob_lbal = g->hob_lbal;
6894 	tf->hob_lbam = g->hob_lbam;
6895 	tf->hob_lbah = g->hob_lbah;
6896 
6897 	return true;
6898 }
6899 
6900 static struct ata_port_operations ipr_sata_ops = {
6901 	.phy_reset = ipr_ata_phy_reset,
6902 	.hardreset = ipr_sata_reset,
6903 	.post_internal_cmd = ipr_ata_post_internal,
6904 	.qc_prep = ata_noop_qc_prep,
6905 	.qc_defer = ipr_qc_defer,
6906 	.qc_issue = ipr_qc_issue,
6907 	.qc_fill_rtf = ipr_qc_fill_rtf,
6908 	.port_start = ata_sas_port_start,
6909 	.port_stop = ata_sas_port_stop
6910 };
6911 
6912 static struct ata_port_info sata_port_info = {
6913 	.flags		= ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
6914 			  ATA_FLAG_SAS_HOST,
6915 	.pio_mask	= ATA_PIO4_ONLY,
6916 	.mwdma_mask	= ATA_MWDMA2,
6917 	.udma_mask	= ATA_UDMA6,
6918 	.port_ops	= &ipr_sata_ops
6919 };
6920 
6921 #ifdef CONFIG_PPC_PSERIES
6922 static const u16 ipr_blocked_processors[] = {
6923 	PVR_NORTHSTAR,
6924 	PVR_PULSAR,
6925 	PVR_POWER4,
6926 	PVR_ICESTAR,
6927 	PVR_SSTAR,
6928 	PVR_POWER4p,
6929 	PVR_630,
6930 	PVR_630p
6931 };
6932 
6933 /**
6934  * ipr_invalid_adapter - Determine if this adapter is supported on this hardware
6935  * @ioa_cfg:	ioa cfg struct
6936  *
6937  * Adapters that use Gemstone revision < 3.1 do not work reliably on
6938  * certain pSeries hardware. This function determines if the given
6939  * adapter is in one of these confgurations or not.
6940  *
6941  * Return value:
6942  * 	1 if adapter is not supported / 0 if adapter is supported
6943  **/
6944 static int ipr_invalid_adapter(struct ipr_ioa_cfg *ioa_cfg)
6945 {
6946 	int i;
6947 
6948 	if ((ioa_cfg->type == 0x5702) && (ioa_cfg->pdev->revision < 4)) {
6949 		for (i = 0; i < ARRAY_SIZE(ipr_blocked_processors); i++) {
6950 			if (pvr_version_is(ipr_blocked_processors[i]))
6951 				return 1;
6952 		}
6953 	}
6954 	return 0;
6955 }
6956 #else
6957 #define ipr_invalid_adapter(ioa_cfg) 0
6958 #endif
6959 
6960 /**
6961  * ipr_ioa_bringdown_done - IOA bring down completion.
6962  * @ipr_cmd:	ipr command struct
6963  *
6964  * This function processes the completion of an adapter bring down.
6965  * It wakes any reset sleepers.
6966  *
6967  * Return value:
6968  * 	IPR_RC_JOB_RETURN
6969  **/
6970 static int ipr_ioa_bringdown_done(struct ipr_cmnd *ipr_cmd)
6971 {
6972 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
6973 	int i;
6974 
6975 	ENTER;
6976 	if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].removing_ioa) {
6977 		ipr_trace;
6978 		spin_unlock_irq(ioa_cfg->host->host_lock);
6979 		scsi_unblock_requests(ioa_cfg->host);
6980 		spin_lock_irq(ioa_cfg->host->host_lock);
6981 	}
6982 
6983 	ioa_cfg->in_reset_reload = 0;
6984 	ioa_cfg->reset_retries = 0;
6985 	for (i = 0; i < ioa_cfg->hrrq_num; i++) {
6986 		spin_lock(&ioa_cfg->hrrq[i]._lock);
6987 		ioa_cfg->hrrq[i].ioa_is_dead = 1;
6988 		spin_unlock(&ioa_cfg->hrrq[i]._lock);
6989 	}
6990 	wmb();
6991 
6992 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
6993 	wake_up_all(&ioa_cfg->reset_wait_q);
6994 	LEAVE;
6995 
6996 	return IPR_RC_JOB_RETURN;
6997 }
6998 
6999 /**
7000  * ipr_ioa_reset_done - IOA reset completion.
7001  * @ipr_cmd:	ipr command struct
7002  *
7003  * This function processes the completion of an adapter reset.
7004  * It schedules any necessary mid-layer add/removes and
7005  * wakes any reset sleepers.
7006  *
7007  * Return value:
7008  * 	IPR_RC_JOB_RETURN
7009  **/
7010 static int ipr_ioa_reset_done(struct ipr_cmnd *ipr_cmd)
7011 {
7012 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7013 	struct ipr_resource_entry *res;
7014 	struct ipr_hostrcb *hostrcb, *temp;
7015 	int i = 0, j;
7016 
7017 	ENTER;
7018 	ioa_cfg->in_reset_reload = 0;
7019 	for (j = 0; j < ioa_cfg->hrrq_num; j++) {
7020 		spin_lock(&ioa_cfg->hrrq[j]._lock);
7021 		ioa_cfg->hrrq[j].allow_cmds = 1;
7022 		spin_unlock(&ioa_cfg->hrrq[j]._lock);
7023 	}
7024 	wmb();
7025 	ioa_cfg->reset_cmd = NULL;
7026 	ioa_cfg->doorbell |= IPR_RUNTIME_RESET;
7027 
7028 	list_for_each_entry(res, &ioa_cfg->used_res_q, queue) {
7029 		if (res->add_to_ml || res->del_from_ml) {
7030 			ipr_trace;
7031 			break;
7032 		}
7033 	}
7034 	schedule_work(&ioa_cfg->work_q);
7035 
7036 	list_for_each_entry_safe(hostrcb, temp, &ioa_cfg->hostrcb_free_q, queue) {
7037 		list_del(&hostrcb->queue);
7038 		if (i++ < IPR_NUM_LOG_HCAMS)
7039 			ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_LOG_DATA, hostrcb);
7040 		else
7041 			ipr_send_hcam(ioa_cfg, IPR_HCAM_CDB_OP_CODE_CONFIG_CHANGE, hostrcb);
7042 	}
7043 
7044 	scsi_report_bus_reset(ioa_cfg->host, IPR_VSET_BUS);
7045 	dev_info(&ioa_cfg->pdev->dev, "IOA initialized.\n");
7046 
7047 	ioa_cfg->reset_retries = 0;
7048 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
7049 	wake_up_all(&ioa_cfg->reset_wait_q);
7050 
7051 	spin_unlock(ioa_cfg->host->host_lock);
7052 	scsi_unblock_requests(ioa_cfg->host);
7053 	spin_lock(ioa_cfg->host->host_lock);
7054 
7055 	if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds)
7056 		scsi_block_requests(ioa_cfg->host);
7057 
7058 	schedule_work(&ioa_cfg->work_q);
7059 	LEAVE;
7060 	return IPR_RC_JOB_RETURN;
7061 }
7062 
7063 /**
7064  * ipr_set_sup_dev_dflt - Initialize a Set Supported Device buffer
7065  * @supported_dev:	supported device struct
7066  * @vpids:			vendor product id struct
7067  *
7068  * Return value:
7069  * 	none
7070  **/
7071 static void ipr_set_sup_dev_dflt(struct ipr_supported_device *supported_dev,
7072 				 struct ipr_std_inq_vpids *vpids)
7073 {
7074 	memset(supported_dev, 0, sizeof(struct ipr_supported_device));
7075 	memcpy(&supported_dev->vpids, vpids, sizeof(struct ipr_std_inq_vpids));
7076 	supported_dev->num_records = 1;
7077 	supported_dev->data_length =
7078 		cpu_to_be16(sizeof(struct ipr_supported_device));
7079 	supported_dev->reserved = 0;
7080 }
7081 
7082 /**
7083  * ipr_set_supported_devs - Send Set Supported Devices for a device
7084  * @ipr_cmd:	ipr command struct
7085  *
7086  * This function sends a Set Supported Devices to the adapter
7087  *
7088  * Return value:
7089  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7090  **/
7091 static int ipr_set_supported_devs(struct ipr_cmnd *ipr_cmd)
7092 {
7093 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7094 	struct ipr_supported_device *supp_dev = &ioa_cfg->vpd_cbs->supp_dev;
7095 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7096 	struct ipr_resource_entry *res = ipr_cmd->u.res;
7097 
7098 	ipr_cmd->job_step = ipr_ioa_reset_done;
7099 
7100 	list_for_each_entry_continue(res, &ioa_cfg->used_res_q, queue) {
7101 		if (!ipr_is_scsi_disk(res))
7102 			continue;
7103 
7104 		ipr_cmd->u.res = res;
7105 		ipr_set_sup_dev_dflt(supp_dev, &res->std_inq_data.vpids);
7106 
7107 		ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7108 		ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
7109 		ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
7110 
7111 		ioarcb->cmd_pkt.cdb[0] = IPR_SET_SUPPORTED_DEVICES;
7112 		ioarcb->cmd_pkt.cdb[1] = IPR_SET_ALL_SUPPORTED_DEVICES;
7113 		ioarcb->cmd_pkt.cdb[7] = (sizeof(struct ipr_supported_device) >> 8) & 0xff;
7114 		ioarcb->cmd_pkt.cdb[8] = sizeof(struct ipr_supported_device) & 0xff;
7115 
7116 		ipr_init_ioadl(ipr_cmd,
7117 			       ioa_cfg->vpd_cbs_dma +
7118 				 offsetof(struct ipr_misc_cbs, supp_dev),
7119 			       sizeof(struct ipr_supported_device),
7120 			       IPR_IOADL_FLAGS_WRITE_LAST);
7121 
7122 		ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout,
7123 			   IPR_SET_SUP_DEVICE_TIMEOUT);
7124 
7125 		if (!ioa_cfg->sis64)
7126 			ipr_cmd->job_step = ipr_set_supported_devs;
7127 		LEAVE;
7128 		return IPR_RC_JOB_RETURN;
7129 	}
7130 
7131 	LEAVE;
7132 	return IPR_RC_JOB_CONTINUE;
7133 }
7134 
7135 /**
7136  * ipr_get_mode_page - Locate specified mode page
7137  * @mode_pages:	mode page buffer
7138  * @page_code:	page code to find
7139  * @len:		minimum required length for mode page
7140  *
7141  * Return value:
7142  * 	pointer to mode page / NULL on failure
7143  **/
7144 static void *ipr_get_mode_page(struct ipr_mode_pages *mode_pages,
7145 			       u32 page_code, u32 len)
7146 {
7147 	struct ipr_mode_page_hdr *mode_hdr;
7148 	u32 page_length;
7149 	u32 length;
7150 
7151 	if (!mode_pages || (mode_pages->hdr.length == 0))
7152 		return NULL;
7153 
7154 	length = (mode_pages->hdr.length + 1) - 4 - mode_pages->hdr.block_desc_len;
7155 	mode_hdr = (struct ipr_mode_page_hdr *)
7156 		(mode_pages->data + mode_pages->hdr.block_desc_len);
7157 
7158 	while (length) {
7159 		if (IPR_GET_MODE_PAGE_CODE(mode_hdr) == page_code) {
7160 			if (mode_hdr->page_length >= (len - sizeof(struct ipr_mode_page_hdr)))
7161 				return mode_hdr;
7162 			break;
7163 		} else {
7164 			page_length = (sizeof(struct ipr_mode_page_hdr) +
7165 				       mode_hdr->page_length);
7166 			length -= page_length;
7167 			mode_hdr = (struct ipr_mode_page_hdr *)
7168 				((unsigned long)mode_hdr + page_length);
7169 		}
7170 	}
7171 	return NULL;
7172 }
7173 
7174 /**
7175  * ipr_check_term_power - Check for term power errors
7176  * @ioa_cfg:	ioa config struct
7177  * @mode_pages:	IOAFP mode pages buffer
7178  *
7179  * Check the IOAFP's mode page 28 for term power errors
7180  *
7181  * Return value:
7182  * 	nothing
7183  **/
7184 static void ipr_check_term_power(struct ipr_ioa_cfg *ioa_cfg,
7185 				 struct ipr_mode_pages *mode_pages)
7186 {
7187 	int i;
7188 	int entry_length;
7189 	struct ipr_dev_bus_entry *bus;
7190 	struct ipr_mode_page28 *mode_page;
7191 
7192 	mode_page = ipr_get_mode_page(mode_pages, 0x28,
7193 				      sizeof(struct ipr_mode_page28));
7194 
7195 	entry_length = mode_page->entry_length;
7196 
7197 	bus = mode_page->bus;
7198 
7199 	for (i = 0; i < mode_page->num_entries; i++) {
7200 		if (bus->flags & IPR_SCSI_ATTR_NO_TERM_PWR) {
7201 			dev_err(&ioa_cfg->pdev->dev,
7202 				"Term power is absent on scsi bus %d\n",
7203 				bus->res_addr.bus);
7204 		}
7205 
7206 		bus = (struct ipr_dev_bus_entry *)((char *)bus + entry_length);
7207 	}
7208 }
7209 
7210 /**
7211  * ipr_scsi_bus_speed_limit - Limit the SCSI speed based on SES table
7212  * @ioa_cfg:	ioa config struct
7213  *
7214  * Looks through the config table checking for SES devices. If
7215  * the SES device is in the SES table indicating a maximum SCSI
7216  * bus speed, the speed is limited for the bus.
7217  *
7218  * Return value:
7219  * 	none
7220  **/
7221 static void ipr_scsi_bus_speed_limit(struct ipr_ioa_cfg *ioa_cfg)
7222 {
7223 	u32 max_xfer_rate;
7224 	int i;
7225 
7226 	for (i = 0; i < IPR_MAX_NUM_BUSES; i++) {
7227 		max_xfer_rate = ipr_get_max_scsi_speed(ioa_cfg, i,
7228 						       ioa_cfg->bus_attr[i].bus_width);
7229 
7230 		if (max_xfer_rate < ioa_cfg->bus_attr[i].max_xfer_rate)
7231 			ioa_cfg->bus_attr[i].max_xfer_rate = max_xfer_rate;
7232 	}
7233 }
7234 
7235 /**
7236  * ipr_modify_ioafp_mode_page_28 - Modify IOAFP Mode Page 28
7237  * @ioa_cfg:	ioa config struct
7238  * @mode_pages:	mode page 28 buffer
7239  *
7240  * Updates mode page 28 based on driver configuration
7241  *
7242  * Return value:
7243  * 	none
7244  **/
7245 static void ipr_modify_ioafp_mode_page_28(struct ipr_ioa_cfg *ioa_cfg,
7246 					  struct ipr_mode_pages *mode_pages)
7247 {
7248 	int i, entry_length;
7249 	struct ipr_dev_bus_entry *bus;
7250 	struct ipr_bus_attributes *bus_attr;
7251 	struct ipr_mode_page28 *mode_page;
7252 
7253 	mode_page = ipr_get_mode_page(mode_pages, 0x28,
7254 				      sizeof(struct ipr_mode_page28));
7255 
7256 	entry_length = mode_page->entry_length;
7257 
7258 	/* Loop for each device bus entry */
7259 	for (i = 0, bus = mode_page->bus;
7260 	     i < mode_page->num_entries;
7261 	     i++, bus = (struct ipr_dev_bus_entry *)((u8 *)bus + entry_length)) {
7262 		if (bus->res_addr.bus > IPR_MAX_NUM_BUSES) {
7263 			dev_err(&ioa_cfg->pdev->dev,
7264 				"Invalid resource address reported: 0x%08X\n",
7265 				IPR_GET_PHYS_LOC(bus->res_addr));
7266 			continue;
7267 		}
7268 
7269 		bus_attr = &ioa_cfg->bus_attr[i];
7270 		bus->extended_reset_delay = IPR_EXTENDED_RESET_DELAY;
7271 		bus->bus_width = bus_attr->bus_width;
7272 		bus->max_xfer_rate = cpu_to_be32(bus_attr->max_xfer_rate);
7273 		bus->flags &= ~IPR_SCSI_ATTR_QAS_MASK;
7274 		if (bus_attr->qas_enabled)
7275 			bus->flags |= IPR_SCSI_ATTR_ENABLE_QAS;
7276 		else
7277 			bus->flags |= IPR_SCSI_ATTR_DISABLE_QAS;
7278 	}
7279 }
7280 
7281 /**
7282  * ipr_build_mode_select - Build a mode select command
7283  * @ipr_cmd:	ipr command struct
7284  * @res_handle:	resource handle to send command to
7285  * @parm:		Byte 2 of Mode Sense command
7286  * @dma_addr:	DMA buffer address
7287  * @xfer_len:	data transfer length
7288  *
7289  * Return value:
7290  * 	none
7291  **/
7292 static void ipr_build_mode_select(struct ipr_cmnd *ipr_cmd,
7293 				  __be32 res_handle, u8 parm,
7294 				  dma_addr_t dma_addr, u8 xfer_len)
7295 {
7296 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7297 
7298 	ioarcb->res_handle = res_handle;
7299 	ioarcb->cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
7300 	ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_WRITE_NOT_READ;
7301 	ioarcb->cmd_pkt.cdb[0] = MODE_SELECT;
7302 	ioarcb->cmd_pkt.cdb[1] = parm;
7303 	ioarcb->cmd_pkt.cdb[4] = xfer_len;
7304 
7305 	ipr_init_ioadl(ipr_cmd, dma_addr, xfer_len, IPR_IOADL_FLAGS_WRITE_LAST);
7306 }
7307 
7308 /**
7309  * ipr_ioafp_mode_select_page28 - Issue Mode Select Page 28 to IOA
7310  * @ipr_cmd:	ipr command struct
7311  *
7312  * This function sets up the SCSI bus attributes and sends
7313  * a Mode Select for Page 28 to activate them.
7314  *
7315  * Return value:
7316  * 	IPR_RC_JOB_RETURN
7317  **/
7318 static int ipr_ioafp_mode_select_page28(struct ipr_cmnd *ipr_cmd)
7319 {
7320 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7321 	struct ipr_mode_pages *mode_pages = &ioa_cfg->vpd_cbs->mode_pages;
7322 	int length;
7323 
7324 	ENTER;
7325 	ipr_scsi_bus_speed_limit(ioa_cfg);
7326 	ipr_check_term_power(ioa_cfg, mode_pages);
7327 	ipr_modify_ioafp_mode_page_28(ioa_cfg, mode_pages);
7328 	length = mode_pages->hdr.length + 1;
7329 	mode_pages->hdr.length = 0;
7330 
7331 	ipr_build_mode_select(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE), 0x11,
7332 			      ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, mode_pages),
7333 			      length);
7334 
7335 	ipr_cmd->job_step = ipr_set_supported_devs;
7336 	ipr_cmd->u.res = list_entry(ioa_cfg->used_res_q.next,
7337 				    struct ipr_resource_entry, queue);
7338 	ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7339 
7340 	LEAVE;
7341 	return IPR_RC_JOB_RETURN;
7342 }
7343 
7344 /**
7345  * ipr_build_mode_sense - Builds a mode sense command
7346  * @ipr_cmd:	ipr command struct
7347  * @res:		resource entry struct
7348  * @parm:		Byte 2 of mode sense command
7349  * @dma_addr:	DMA address of mode sense buffer
7350  * @xfer_len:	Size of DMA buffer
7351  *
7352  * Return value:
7353  * 	none
7354  **/
7355 static void ipr_build_mode_sense(struct ipr_cmnd *ipr_cmd,
7356 				 __be32 res_handle,
7357 				 u8 parm, dma_addr_t dma_addr, u8 xfer_len)
7358 {
7359 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7360 
7361 	ioarcb->res_handle = res_handle;
7362 	ioarcb->cmd_pkt.cdb[0] = MODE_SENSE;
7363 	ioarcb->cmd_pkt.cdb[2] = parm;
7364 	ioarcb->cmd_pkt.cdb[4] = xfer_len;
7365 	ioarcb->cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
7366 
7367 	ipr_init_ioadl(ipr_cmd, dma_addr, xfer_len, IPR_IOADL_FLAGS_READ_LAST);
7368 }
7369 
7370 /**
7371  * ipr_reset_cmd_failed - Handle failure of IOA reset command
7372  * @ipr_cmd:	ipr command struct
7373  *
7374  * This function handles the failure of an IOA bringup command.
7375  *
7376  * Return value:
7377  * 	IPR_RC_JOB_RETURN
7378  **/
7379 static int ipr_reset_cmd_failed(struct ipr_cmnd *ipr_cmd)
7380 {
7381 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7382 	u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7383 
7384 	dev_err(&ioa_cfg->pdev->dev,
7385 		"0x%02X failed with IOASC: 0x%08X\n",
7386 		ipr_cmd->ioarcb.cmd_pkt.cdb[0], ioasc);
7387 
7388 	ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
7389 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
7390 	return IPR_RC_JOB_RETURN;
7391 }
7392 
7393 /**
7394  * ipr_reset_mode_sense_failed - Handle failure of IOAFP mode sense
7395  * @ipr_cmd:	ipr command struct
7396  *
7397  * This function handles the failure of a Mode Sense to the IOAFP.
7398  * Some adapters do not handle all mode pages.
7399  *
7400  * Return value:
7401  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7402  **/
7403 static int ipr_reset_mode_sense_failed(struct ipr_cmnd *ipr_cmd)
7404 {
7405 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7406 	u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7407 
7408 	if (ioasc == IPR_IOASC_IR_INVALID_REQ_TYPE_OR_PKT) {
7409 		ipr_cmd->job_step = ipr_set_supported_devs;
7410 		ipr_cmd->u.res = list_entry(ioa_cfg->used_res_q.next,
7411 					    struct ipr_resource_entry, queue);
7412 		return IPR_RC_JOB_CONTINUE;
7413 	}
7414 
7415 	return ipr_reset_cmd_failed(ipr_cmd);
7416 }
7417 
7418 /**
7419  * ipr_ioafp_mode_sense_page28 - Issue Mode Sense Page 28 to IOA
7420  * @ipr_cmd:	ipr command struct
7421  *
7422  * This function send a Page 28 mode sense to the IOA to
7423  * retrieve SCSI bus attributes.
7424  *
7425  * Return value:
7426  * 	IPR_RC_JOB_RETURN
7427  **/
7428 static int ipr_ioafp_mode_sense_page28(struct ipr_cmnd *ipr_cmd)
7429 {
7430 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7431 
7432 	ENTER;
7433 	ipr_build_mode_sense(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE),
7434 			     0x28, ioa_cfg->vpd_cbs_dma +
7435 			     offsetof(struct ipr_misc_cbs, mode_pages),
7436 			     sizeof(struct ipr_mode_pages));
7437 
7438 	ipr_cmd->job_step = ipr_ioafp_mode_select_page28;
7439 	ipr_cmd->job_step_failed = ipr_reset_mode_sense_failed;
7440 
7441 	ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7442 
7443 	LEAVE;
7444 	return IPR_RC_JOB_RETURN;
7445 }
7446 
7447 /**
7448  * ipr_ioafp_mode_select_page24 - Issue Mode Select to IOA
7449  * @ipr_cmd:	ipr command struct
7450  *
7451  * This function enables dual IOA RAID support if possible.
7452  *
7453  * Return value:
7454  * 	IPR_RC_JOB_RETURN
7455  **/
7456 static int ipr_ioafp_mode_select_page24(struct ipr_cmnd *ipr_cmd)
7457 {
7458 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7459 	struct ipr_mode_pages *mode_pages = &ioa_cfg->vpd_cbs->mode_pages;
7460 	struct ipr_mode_page24 *mode_page;
7461 	int length;
7462 
7463 	ENTER;
7464 	mode_page = ipr_get_mode_page(mode_pages, 0x24,
7465 				      sizeof(struct ipr_mode_page24));
7466 
7467 	if (mode_page)
7468 		mode_page->flags |= IPR_ENABLE_DUAL_IOA_AF;
7469 
7470 	length = mode_pages->hdr.length + 1;
7471 	mode_pages->hdr.length = 0;
7472 
7473 	ipr_build_mode_select(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE), 0x11,
7474 			      ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, mode_pages),
7475 			      length);
7476 
7477 	ipr_cmd->job_step = ipr_ioafp_mode_sense_page28;
7478 	ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7479 
7480 	LEAVE;
7481 	return IPR_RC_JOB_RETURN;
7482 }
7483 
7484 /**
7485  * ipr_reset_mode_sense_page24_failed - Handle failure of IOAFP mode sense
7486  * @ipr_cmd:	ipr command struct
7487  *
7488  * This function handles the failure of a Mode Sense to the IOAFP.
7489  * Some adapters do not handle all mode pages.
7490  *
7491  * Return value:
7492  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7493  **/
7494 static int ipr_reset_mode_sense_page24_failed(struct ipr_cmnd *ipr_cmd)
7495 {
7496 	u32 ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
7497 
7498 	if (ioasc == IPR_IOASC_IR_INVALID_REQ_TYPE_OR_PKT) {
7499 		ipr_cmd->job_step = ipr_ioafp_mode_sense_page28;
7500 		return IPR_RC_JOB_CONTINUE;
7501 	}
7502 
7503 	return ipr_reset_cmd_failed(ipr_cmd);
7504 }
7505 
7506 /**
7507  * ipr_ioafp_mode_sense_page24 - Issue Page 24 Mode Sense to IOA
7508  * @ipr_cmd:	ipr command struct
7509  *
7510  * This function send a mode sense to the IOA to retrieve
7511  * the IOA Advanced Function Control mode page.
7512  *
7513  * Return value:
7514  * 	IPR_RC_JOB_RETURN
7515  **/
7516 static int ipr_ioafp_mode_sense_page24(struct ipr_cmnd *ipr_cmd)
7517 {
7518 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7519 
7520 	ENTER;
7521 	ipr_build_mode_sense(ipr_cmd, cpu_to_be32(IPR_IOA_RES_HANDLE),
7522 			     0x24, ioa_cfg->vpd_cbs_dma +
7523 			     offsetof(struct ipr_misc_cbs, mode_pages),
7524 			     sizeof(struct ipr_mode_pages));
7525 
7526 	ipr_cmd->job_step = ipr_ioafp_mode_select_page24;
7527 	ipr_cmd->job_step_failed = ipr_reset_mode_sense_page24_failed;
7528 
7529 	ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7530 
7531 	LEAVE;
7532 	return IPR_RC_JOB_RETURN;
7533 }
7534 
7535 /**
7536  * ipr_init_res_table - Initialize the resource table
7537  * @ipr_cmd:	ipr command struct
7538  *
7539  * This function looks through the existing resource table, comparing
7540  * it with the config table. This function will take care of old/new
7541  * devices and schedule adding/removing them from the mid-layer
7542  * as appropriate.
7543  *
7544  * Return value:
7545  * 	IPR_RC_JOB_CONTINUE
7546  **/
7547 static int ipr_init_res_table(struct ipr_cmnd *ipr_cmd)
7548 {
7549 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7550 	struct ipr_resource_entry *res, *temp;
7551 	struct ipr_config_table_entry_wrapper cfgtew;
7552 	int entries, found, flag, i;
7553 	LIST_HEAD(old_res);
7554 
7555 	ENTER;
7556 	if (ioa_cfg->sis64)
7557 		flag = ioa_cfg->u.cfg_table64->hdr64.flags;
7558 	else
7559 		flag = ioa_cfg->u.cfg_table->hdr.flags;
7560 
7561 	if (flag & IPR_UCODE_DOWNLOAD_REQ)
7562 		dev_err(&ioa_cfg->pdev->dev, "Microcode download required\n");
7563 
7564 	list_for_each_entry_safe(res, temp, &ioa_cfg->used_res_q, queue)
7565 		list_move_tail(&res->queue, &old_res);
7566 
7567 	if (ioa_cfg->sis64)
7568 		entries = be16_to_cpu(ioa_cfg->u.cfg_table64->hdr64.num_entries);
7569 	else
7570 		entries = ioa_cfg->u.cfg_table->hdr.num_entries;
7571 
7572 	for (i = 0; i < entries; i++) {
7573 		if (ioa_cfg->sis64)
7574 			cfgtew.u.cfgte64 = &ioa_cfg->u.cfg_table64->dev[i];
7575 		else
7576 			cfgtew.u.cfgte = &ioa_cfg->u.cfg_table->dev[i];
7577 		found = 0;
7578 
7579 		list_for_each_entry_safe(res, temp, &old_res, queue) {
7580 			if (ipr_is_same_device(res, &cfgtew)) {
7581 				list_move_tail(&res->queue, &ioa_cfg->used_res_q);
7582 				found = 1;
7583 				break;
7584 			}
7585 		}
7586 
7587 		if (!found) {
7588 			if (list_empty(&ioa_cfg->free_res_q)) {
7589 				dev_err(&ioa_cfg->pdev->dev, "Too many devices attached\n");
7590 				break;
7591 			}
7592 
7593 			found = 1;
7594 			res = list_entry(ioa_cfg->free_res_q.next,
7595 					 struct ipr_resource_entry, queue);
7596 			list_move_tail(&res->queue, &ioa_cfg->used_res_q);
7597 			ipr_init_res_entry(res, &cfgtew);
7598 			res->add_to_ml = 1;
7599 		} else if (res->sdev && (ipr_is_vset_device(res) || ipr_is_scsi_disk(res)))
7600 			res->sdev->allow_restart = 1;
7601 
7602 		if (found)
7603 			ipr_update_res_entry(res, &cfgtew);
7604 	}
7605 
7606 	list_for_each_entry_safe(res, temp, &old_res, queue) {
7607 		if (res->sdev) {
7608 			res->del_from_ml = 1;
7609 			res->res_handle = IPR_INVALID_RES_HANDLE;
7610 			list_move_tail(&res->queue, &ioa_cfg->used_res_q);
7611 		}
7612 	}
7613 
7614 	list_for_each_entry_safe(res, temp, &old_res, queue) {
7615 		ipr_clear_res_target(res);
7616 		list_move_tail(&res->queue, &ioa_cfg->free_res_q);
7617 	}
7618 
7619 	if (ioa_cfg->dual_raid && ipr_dual_ioa_raid)
7620 		ipr_cmd->job_step = ipr_ioafp_mode_sense_page24;
7621 	else
7622 		ipr_cmd->job_step = ipr_ioafp_mode_sense_page28;
7623 
7624 	LEAVE;
7625 	return IPR_RC_JOB_CONTINUE;
7626 }
7627 
7628 /**
7629  * ipr_ioafp_query_ioa_cfg - Send a Query IOA Config to the adapter.
7630  * @ipr_cmd:	ipr command struct
7631  *
7632  * This function sends a Query IOA Configuration command
7633  * to the adapter to retrieve the IOA configuration table.
7634  *
7635  * Return value:
7636  * 	IPR_RC_JOB_RETURN
7637  **/
7638 static int ipr_ioafp_query_ioa_cfg(struct ipr_cmnd *ipr_cmd)
7639 {
7640 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7641 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7642 	struct ipr_inquiry_page3 *ucode_vpd = &ioa_cfg->vpd_cbs->page3_data;
7643 	struct ipr_inquiry_cap *cap = &ioa_cfg->vpd_cbs->cap;
7644 
7645 	ENTER;
7646 	if (cap->cap & IPR_CAP_DUAL_IOA_RAID)
7647 		ioa_cfg->dual_raid = 1;
7648 	dev_info(&ioa_cfg->pdev->dev, "Adapter firmware version: %02X%02X%02X%02X\n",
7649 		 ucode_vpd->major_release, ucode_vpd->card_type,
7650 		 ucode_vpd->minor_release[0], ucode_vpd->minor_release[1]);
7651 	ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
7652 	ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7653 
7654 	ioarcb->cmd_pkt.cdb[0] = IPR_QUERY_IOA_CONFIG;
7655 	ioarcb->cmd_pkt.cdb[6] = (ioa_cfg->cfg_table_size >> 16) & 0xff;
7656 	ioarcb->cmd_pkt.cdb[7] = (ioa_cfg->cfg_table_size >> 8) & 0xff;
7657 	ioarcb->cmd_pkt.cdb[8] = ioa_cfg->cfg_table_size & 0xff;
7658 
7659 	ipr_init_ioadl(ipr_cmd, ioa_cfg->cfg_table_dma, ioa_cfg->cfg_table_size,
7660 		       IPR_IOADL_FLAGS_READ_LAST);
7661 
7662 	ipr_cmd->job_step = ipr_init_res_table;
7663 
7664 	ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7665 
7666 	LEAVE;
7667 	return IPR_RC_JOB_RETURN;
7668 }
7669 
7670 /**
7671  * ipr_ioafp_inquiry - Send an Inquiry to the adapter.
7672  * @ipr_cmd:	ipr command struct
7673  *
7674  * This utility function sends an inquiry to the adapter.
7675  *
7676  * Return value:
7677  * 	none
7678  **/
7679 static void ipr_ioafp_inquiry(struct ipr_cmnd *ipr_cmd, u8 flags, u8 page,
7680 			      dma_addr_t dma_addr, u8 xfer_len)
7681 {
7682 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7683 
7684 	ENTER;
7685 	ioarcb->cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
7686 	ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7687 
7688 	ioarcb->cmd_pkt.cdb[0] = INQUIRY;
7689 	ioarcb->cmd_pkt.cdb[1] = flags;
7690 	ioarcb->cmd_pkt.cdb[2] = page;
7691 	ioarcb->cmd_pkt.cdb[4] = xfer_len;
7692 
7693 	ipr_init_ioadl(ipr_cmd, dma_addr, xfer_len, IPR_IOADL_FLAGS_READ_LAST);
7694 
7695 	ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
7696 	LEAVE;
7697 }
7698 
7699 /**
7700  * ipr_inquiry_page_supported - Is the given inquiry page supported
7701  * @page0:		inquiry page 0 buffer
7702  * @page:		page code.
7703  *
7704  * This function determines if the specified inquiry page is supported.
7705  *
7706  * Return value:
7707  *	1 if page is supported / 0 if not
7708  **/
7709 static int ipr_inquiry_page_supported(struct ipr_inquiry_page0 *page0, u8 page)
7710 {
7711 	int i;
7712 
7713 	for (i = 0; i < min_t(u8, page0->len, IPR_INQUIRY_PAGE0_ENTRIES); i++)
7714 		if (page0->page[i] == page)
7715 			return 1;
7716 
7717 	return 0;
7718 }
7719 
7720 /**
7721  * ipr_ioafp_cap_inquiry - Send a Page 0xD0 Inquiry to the adapter.
7722  * @ipr_cmd:	ipr command struct
7723  *
7724  * This function sends a Page 0xD0 inquiry to the adapter
7725  * to retrieve adapter capabilities.
7726  *
7727  * Return value:
7728  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7729  **/
7730 static int ipr_ioafp_cap_inquiry(struct ipr_cmnd *ipr_cmd)
7731 {
7732 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7733 	struct ipr_inquiry_page0 *page0 = &ioa_cfg->vpd_cbs->page0_data;
7734 	struct ipr_inquiry_cap *cap = &ioa_cfg->vpd_cbs->cap;
7735 
7736 	ENTER;
7737 	ipr_cmd->job_step = ipr_ioafp_query_ioa_cfg;
7738 	memset(cap, 0, sizeof(*cap));
7739 
7740 	if (ipr_inquiry_page_supported(page0, 0xD0)) {
7741 		ipr_ioafp_inquiry(ipr_cmd, 1, 0xD0,
7742 				  ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, cap),
7743 				  sizeof(struct ipr_inquiry_cap));
7744 		return IPR_RC_JOB_RETURN;
7745 	}
7746 
7747 	LEAVE;
7748 	return IPR_RC_JOB_CONTINUE;
7749 }
7750 
7751 /**
7752  * ipr_ioafp_page3_inquiry - Send a Page 3 Inquiry to the adapter.
7753  * @ipr_cmd:	ipr command struct
7754  *
7755  * This function sends a Page 3 inquiry to the adapter
7756  * to retrieve software VPD information.
7757  *
7758  * Return value:
7759  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7760  **/
7761 static int ipr_ioafp_page3_inquiry(struct ipr_cmnd *ipr_cmd)
7762 {
7763 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7764 
7765 	ENTER;
7766 
7767 	ipr_cmd->job_step = ipr_ioafp_cap_inquiry;
7768 
7769 	ipr_ioafp_inquiry(ipr_cmd, 1, 3,
7770 			  ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page3_data),
7771 			  sizeof(struct ipr_inquiry_page3));
7772 
7773 	LEAVE;
7774 	return IPR_RC_JOB_RETURN;
7775 }
7776 
7777 /**
7778  * ipr_ioafp_page0_inquiry - Send a Page 0 Inquiry to the adapter.
7779  * @ipr_cmd:	ipr command struct
7780  *
7781  * This function sends a Page 0 inquiry to the adapter
7782  * to retrieve supported inquiry pages.
7783  *
7784  * Return value:
7785  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
7786  **/
7787 static int ipr_ioafp_page0_inquiry(struct ipr_cmnd *ipr_cmd)
7788 {
7789 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7790 	char type[5];
7791 
7792 	ENTER;
7793 
7794 	/* Grab the type out of the VPD and store it away */
7795 	memcpy(type, ioa_cfg->vpd_cbs->ioa_vpd.std_inq_data.vpids.product_id, 4);
7796 	type[4] = '\0';
7797 	ioa_cfg->type = simple_strtoul((char *)type, NULL, 16);
7798 
7799 	if (ipr_invalid_adapter(ioa_cfg)) {
7800 		dev_err(&ioa_cfg->pdev->dev,
7801 			"Adapter not supported in this hardware configuration.\n");
7802 
7803 		if (!ipr_testmode) {
7804 			ioa_cfg->reset_retries += IPR_NUM_RESET_RELOAD_RETRIES;
7805 			ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
7806 			list_add_tail(&ipr_cmd->queue,
7807 					&ioa_cfg->hrrq->hrrq_free_q);
7808 			return IPR_RC_JOB_RETURN;
7809 		}
7810 	}
7811 
7812 	ipr_cmd->job_step = ipr_ioafp_page3_inquiry;
7813 
7814 	ipr_ioafp_inquiry(ipr_cmd, 1, 0,
7815 			  ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page0_data),
7816 			  sizeof(struct ipr_inquiry_page0));
7817 
7818 	LEAVE;
7819 	return IPR_RC_JOB_RETURN;
7820 }
7821 
7822 /**
7823  * ipr_ioafp_std_inquiry - Send a Standard Inquiry to the adapter.
7824  * @ipr_cmd:	ipr command struct
7825  *
7826  * This function sends a standard inquiry to the adapter.
7827  *
7828  * Return value:
7829  * 	IPR_RC_JOB_RETURN
7830  **/
7831 static int ipr_ioafp_std_inquiry(struct ipr_cmnd *ipr_cmd)
7832 {
7833 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7834 
7835 	ENTER;
7836 	ipr_cmd->job_step = ipr_ioafp_page0_inquiry;
7837 
7838 	ipr_ioafp_inquiry(ipr_cmd, 0, 0,
7839 			  ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, ioa_vpd),
7840 			  sizeof(struct ipr_ioa_vpd));
7841 
7842 	LEAVE;
7843 	return IPR_RC_JOB_RETURN;
7844 }
7845 
7846 /**
7847  * ipr_ioafp_identify_hrrq - Send Identify Host RRQ.
7848  * @ipr_cmd:	ipr command struct
7849  *
7850  * This function send an Identify Host Request Response Queue
7851  * command to establish the HRRQ with the adapter.
7852  *
7853  * Return value:
7854  * 	IPR_RC_JOB_RETURN
7855  **/
7856 static int ipr_ioafp_identify_hrrq(struct ipr_cmnd *ipr_cmd)
7857 {
7858 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7859 	struct ipr_ioarcb *ioarcb = &ipr_cmd->ioarcb;
7860 	struct ipr_hrr_queue *hrrq;
7861 
7862 	ENTER;
7863 	ipr_cmd->job_step = ipr_ioafp_std_inquiry;
7864 	dev_info(&ioa_cfg->pdev->dev, "Starting IOA initialization sequence.\n");
7865 
7866 	if (ioa_cfg->identify_hrrq_index < ioa_cfg->hrrq_num) {
7867 		hrrq = &ioa_cfg->hrrq[ioa_cfg->identify_hrrq_index];
7868 
7869 		ioarcb->cmd_pkt.cdb[0] = IPR_ID_HOST_RR_Q;
7870 		ioarcb->res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
7871 
7872 		ioarcb->cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
7873 		if (ioa_cfg->sis64)
7874 			ioarcb->cmd_pkt.cdb[1] = 0x1;
7875 
7876 		if (ioa_cfg->nvectors == 1)
7877 			ioarcb->cmd_pkt.cdb[1] &= ~IPR_ID_HRRQ_SELE_ENABLE;
7878 		else
7879 			ioarcb->cmd_pkt.cdb[1] |= IPR_ID_HRRQ_SELE_ENABLE;
7880 
7881 		ioarcb->cmd_pkt.cdb[2] =
7882 			((u64) hrrq->host_rrq_dma >> 24) & 0xff;
7883 		ioarcb->cmd_pkt.cdb[3] =
7884 			((u64) hrrq->host_rrq_dma >> 16) & 0xff;
7885 		ioarcb->cmd_pkt.cdb[4] =
7886 			((u64) hrrq->host_rrq_dma >> 8) & 0xff;
7887 		ioarcb->cmd_pkt.cdb[5] =
7888 			((u64) hrrq->host_rrq_dma) & 0xff;
7889 		ioarcb->cmd_pkt.cdb[7] =
7890 			((sizeof(u32) * hrrq->size) >> 8) & 0xff;
7891 		ioarcb->cmd_pkt.cdb[8] =
7892 			(sizeof(u32) * hrrq->size) & 0xff;
7893 
7894 		if (ioarcb->cmd_pkt.cdb[1] & IPR_ID_HRRQ_SELE_ENABLE)
7895 			ioarcb->cmd_pkt.cdb[9] =
7896 					ioa_cfg->identify_hrrq_index;
7897 
7898 		if (ioa_cfg->sis64) {
7899 			ioarcb->cmd_pkt.cdb[10] =
7900 				((u64) hrrq->host_rrq_dma >> 56) & 0xff;
7901 			ioarcb->cmd_pkt.cdb[11] =
7902 				((u64) hrrq->host_rrq_dma >> 48) & 0xff;
7903 			ioarcb->cmd_pkt.cdb[12] =
7904 				((u64) hrrq->host_rrq_dma >> 40) & 0xff;
7905 			ioarcb->cmd_pkt.cdb[13] =
7906 				((u64) hrrq->host_rrq_dma >> 32) & 0xff;
7907 		}
7908 
7909 		if (ioarcb->cmd_pkt.cdb[1] & IPR_ID_HRRQ_SELE_ENABLE)
7910 			ioarcb->cmd_pkt.cdb[14] =
7911 					ioa_cfg->identify_hrrq_index;
7912 
7913 		ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout,
7914 			   IPR_INTERNAL_TIMEOUT);
7915 
7916 		if (++ioa_cfg->identify_hrrq_index < ioa_cfg->hrrq_num)
7917 			ipr_cmd->job_step = ipr_ioafp_identify_hrrq;
7918 
7919 		LEAVE;
7920 		return IPR_RC_JOB_RETURN;
7921 	}
7922 
7923 	LEAVE;
7924 	return IPR_RC_JOB_CONTINUE;
7925 }
7926 
7927 /**
7928  * ipr_reset_timer_done - Adapter reset timer function
7929  * @ipr_cmd:	ipr command struct
7930  *
7931  * Description: This function is used in adapter reset processing
7932  * for timing events. If the reset_cmd pointer in the IOA
7933  * config struct is not this adapter's we are doing nested
7934  * resets and fail_all_ops will take care of freeing the
7935  * command block.
7936  *
7937  * Return value:
7938  * 	none
7939  **/
7940 static void ipr_reset_timer_done(struct ipr_cmnd *ipr_cmd)
7941 {
7942 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
7943 	unsigned long lock_flags = 0;
7944 
7945 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
7946 
7947 	if (ioa_cfg->reset_cmd == ipr_cmd) {
7948 		list_del(&ipr_cmd->queue);
7949 		ipr_cmd->done(ipr_cmd);
7950 	}
7951 
7952 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
7953 }
7954 
7955 /**
7956  * ipr_reset_start_timer - Start a timer for adapter reset job
7957  * @ipr_cmd:	ipr command struct
7958  * @timeout:	timeout value
7959  *
7960  * Description: This function is used in adapter reset processing
7961  * for timing events. If the reset_cmd pointer in the IOA
7962  * config struct is not this adapter's we are doing nested
7963  * resets and fail_all_ops will take care of freeing the
7964  * command block.
7965  *
7966  * Return value:
7967  * 	none
7968  **/
7969 static void ipr_reset_start_timer(struct ipr_cmnd *ipr_cmd,
7970 				  unsigned long timeout)
7971 {
7972 
7973 	ENTER;
7974 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
7975 	ipr_cmd->done = ipr_reset_ioa_job;
7976 
7977 	ipr_cmd->timer.data = (unsigned long) ipr_cmd;
7978 	ipr_cmd->timer.expires = jiffies + timeout;
7979 	ipr_cmd->timer.function = (void (*)(unsigned long))ipr_reset_timer_done;
7980 	add_timer(&ipr_cmd->timer);
7981 }
7982 
7983 /**
7984  * ipr_init_ioa_mem - Initialize ioa_cfg control block
7985  * @ioa_cfg:	ioa cfg struct
7986  *
7987  * Return value:
7988  * 	nothing
7989  **/
7990 static void ipr_init_ioa_mem(struct ipr_ioa_cfg *ioa_cfg)
7991 {
7992 	struct ipr_hrr_queue *hrrq;
7993 
7994 	for_each_hrrq(hrrq, ioa_cfg) {
7995 		spin_lock(&hrrq->_lock);
7996 		memset(hrrq->host_rrq, 0, sizeof(u32) * hrrq->size);
7997 
7998 		/* Initialize Host RRQ pointers */
7999 		hrrq->hrrq_start = hrrq->host_rrq;
8000 		hrrq->hrrq_end = &hrrq->host_rrq[hrrq->size - 1];
8001 		hrrq->hrrq_curr = hrrq->hrrq_start;
8002 		hrrq->toggle_bit = 1;
8003 		spin_unlock(&hrrq->_lock);
8004 	}
8005 	wmb();
8006 
8007 	ioa_cfg->identify_hrrq_index = 0;
8008 	if (ioa_cfg->hrrq_num == 1)
8009 		atomic_set(&ioa_cfg->hrrq_index, 0);
8010 	else
8011 		atomic_set(&ioa_cfg->hrrq_index, 1);
8012 
8013 	/* Zero out config table */
8014 	memset(ioa_cfg->u.cfg_table, 0, ioa_cfg->cfg_table_size);
8015 }
8016 
8017 /**
8018  * ipr_reset_next_stage - Process IPL stage change based on feedback register.
8019  * @ipr_cmd:	ipr command struct
8020  *
8021  * Return value:
8022  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
8023  **/
8024 static int ipr_reset_next_stage(struct ipr_cmnd *ipr_cmd)
8025 {
8026 	unsigned long stage, stage_time;
8027 	u32 feedback;
8028 	volatile u32 int_reg;
8029 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8030 	u64 maskval = 0;
8031 
8032 	feedback = readl(ioa_cfg->regs.init_feedback_reg);
8033 	stage = feedback & IPR_IPL_INIT_STAGE_MASK;
8034 	stage_time = feedback & IPR_IPL_INIT_STAGE_TIME_MASK;
8035 
8036 	ipr_dbg("IPL stage = 0x%lx, IPL stage time = %ld\n", stage, stage_time);
8037 
8038 	/* sanity check the stage_time value */
8039 	if (stage_time == 0)
8040 		stage_time = IPR_IPL_INIT_DEFAULT_STAGE_TIME;
8041 	else if (stage_time < IPR_IPL_INIT_MIN_STAGE_TIME)
8042 		stage_time = IPR_IPL_INIT_MIN_STAGE_TIME;
8043 	else if (stage_time > IPR_LONG_OPERATIONAL_TIMEOUT)
8044 		stage_time = IPR_LONG_OPERATIONAL_TIMEOUT;
8045 
8046 	if (stage == IPR_IPL_INIT_STAGE_UNKNOWN) {
8047 		writel(IPR_PCII_IPL_STAGE_CHANGE, ioa_cfg->regs.set_interrupt_mask_reg);
8048 		int_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
8049 		stage_time = ioa_cfg->transop_timeout;
8050 		ipr_cmd->job_step = ipr_ioafp_identify_hrrq;
8051 	} else if (stage == IPR_IPL_INIT_STAGE_TRANSOP) {
8052 		int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
8053 		if (int_reg & IPR_PCII_IOA_TRANS_TO_OPER) {
8054 			ipr_cmd->job_step = ipr_ioafp_identify_hrrq;
8055 			maskval = IPR_PCII_IPL_STAGE_CHANGE;
8056 			maskval = (maskval << 32) | IPR_PCII_IOA_TRANS_TO_OPER;
8057 			writeq(maskval, ioa_cfg->regs.set_interrupt_mask_reg);
8058 			int_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
8059 			return IPR_RC_JOB_CONTINUE;
8060 		}
8061 	}
8062 
8063 	ipr_cmd->timer.data = (unsigned long) ipr_cmd;
8064 	ipr_cmd->timer.expires = jiffies + stage_time * HZ;
8065 	ipr_cmd->timer.function = (void (*)(unsigned long))ipr_oper_timeout;
8066 	ipr_cmd->done = ipr_reset_ioa_job;
8067 	add_timer(&ipr_cmd->timer);
8068 
8069 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
8070 
8071 	return IPR_RC_JOB_RETURN;
8072 }
8073 
8074 /**
8075  * ipr_reset_enable_ioa - Enable the IOA following a reset.
8076  * @ipr_cmd:	ipr command struct
8077  *
8078  * This function reinitializes some control blocks and
8079  * enables destructive diagnostics on the adapter.
8080  *
8081  * Return value:
8082  * 	IPR_RC_JOB_RETURN
8083  **/
8084 static int ipr_reset_enable_ioa(struct ipr_cmnd *ipr_cmd)
8085 {
8086 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8087 	volatile u32 int_reg;
8088 	volatile u64 maskval;
8089 	int i;
8090 
8091 	ENTER;
8092 	ipr_cmd->job_step = ipr_ioafp_identify_hrrq;
8093 	ipr_init_ioa_mem(ioa_cfg);
8094 
8095 	for (i = 0; i < ioa_cfg->hrrq_num; i++) {
8096 		spin_lock(&ioa_cfg->hrrq[i]._lock);
8097 		ioa_cfg->hrrq[i].allow_interrupts = 1;
8098 		spin_unlock(&ioa_cfg->hrrq[i]._lock);
8099 	}
8100 	wmb();
8101 	if (ioa_cfg->sis64) {
8102 		/* Set the adapter to the correct endian mode. */
8103 		writel(IPR_ENDIAN_SWAP_KEY, ioa_cfg->regs.endian_swap_reg);
8104 		int_reg = readl(ioa_cfg->regs.endian_swap_reg);
8105 	}
8106 
8107 	int_reg = readl(ioa_cfg->regs.sense_interrupt_reg32);
8108 
8109 	if (int_reg & IPR_PCII_IOA_TRANS_TO_OPER) {
8110 		writel((IPR_PCII_ERROR_INTERRUPTS | IPR_PCII_HRRQ_UPDATED),
8111 		       ioa_cfg->regs.clr_interrupt_mask_reg32);
8112 		int_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
8113 		return IPR_RC_JOB_CONTINUE;
8114 	}
8115 
8116 	/* Enable destructive diagnostics on IOA */
8117 	writel(ioa_cfg->doorbell, ioa_cfg->regs.set_uproc_interrupt_reg32);
8118 
8119 	if (ioa_cfg->sis64) {
8120 		maskval = IPR_PCII_IPL_STAGE_CHANGE;
8121 		maskval = (maskval << 32) | IPR_PCII_OPER_INTERRUPTS;
8122 		writeq(maskval, ioa_cfg->regs.clr_interrupt_mask_reg);
8123 	} else
8124 		writel(IPR_PCII_OPER_INTERRUPTS, ioa_cfg->regs.clr_interrupt_mask_reg32);
8125 
8126 	int_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
8127 
8128 	dev_info(&ioa_cfg->pdev->dev, "Initializing IOA.\n");
8129 
8130 	if (ioa_cfg->sis64) {
8131 		ipr_cmd->job_step = ipr_reset_next_stage;
8132 		return IPR_RC_JOB_CONTINUE;
8133 	}
8134 
8135 	ipr_cmd->timer.data = (unsigned long) ipr_cmd;
8136 	ipr_cmd->timer.expires = jiffies + (ioa_cfg->transop_timeout * HZ);
8137 	ipr_cmd->timer.function = (void (*)(unsigned long))ipr_oper_timeout;
8138 	ipr_cmd->done = ipr_reset_ioa_job;
8139 	add_timer(&ipr_cmd->timer);
8140 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
8141 
8142 	LEAVE;
8143 	return IPR_RC_JOB_RETURN;
8144 }
8145 
8146 /**
8147  * ipr_reset_wait_for_dump - Wait for a dump to timeout.
8148  * @ipr_cmd:	ipr command struct
8149  *
8150  * This function is invoked when an adapter dump has run out
8151  * of processing time.
8152  *
8153  * Return value:
8154  * 	IPR_RC_JOB_CONTINUE
8155  **/
8156 static int ipr_reset_wait_for_dump(struct ipr_cmnd *ipr_cmd)
8157 {
8158 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8159 
8160 	if (ioa_cfg->sdt_state == GET_DUMP)
8161 		ioa_cfg->sdt_state = WAIT_FOR_DUMP;
8162 	else if (ioa_cfg->sdt_state == READ_DUMP)
8163 		ioa_cfg->sdt_state = ABORT_DUMP;
8164 
8165 	ioa_cfg->dump_timeout = 1;
8166 	ipr_cmd->job_step = ipr_reset_alert;
8167 
8168 	return IPR_RC_JOB_CONTINUE;
8169 }
8170 
8171 /**
8172  * ipr_unit_check_no_data - Log a unit check/no data error log
8173  * @ioa_cfg:		ioa config struct
8174  *
8175  * Logs an error indicating the adapter unit checked, but for some
8176  * reason, we were unable to fetch the unit check buffer.
8177  *
8178  * Return value:
8179  * 	nothing
8180  **/
8181 static void ipr_unit_check_no_data(struct ipr_ioa_cfg *ioa_cfg)
8182 {
8183 	ioa_cfg->errors_logged++;
8184 	dev_err(&ioa_cfg->pdev->dev, "IOA unit check with no data\n");
8185 }
8186 
8187 /**
8188  * ipr_get_unit_check_buffer - Get the unit check buffer from the IOA
8189  * @ioa_cfg:		ioa config struct
8190  *
8191  * Fetches the unit check buffer from the adapter by clocking the data
8192  * through the mailbox register.
8193  *
8194  * Return value:
8195  * 	nothing
8196  **/
8197 static void ipr_get_unit_check_buffer(struct ipr_ioa_cfg *ioa_cfg)
8198 {
8199 	unsigned long mailbox;
8200 	struct ipr_hostrcb *hostrcb;
8201 	struct ipr_uc_sdt sdt;
8202 	int rc, length;
8203 	u32 ioasc;
8204 
8205 	mailbox = readl(ioa_cfg->ioa_mailbox);
8206 
8207 	if (!ioa_cfg->sis64 && !ipr_sdt_is_fmt2(mailbox)) {
8208 		ipr_unit_check_no_data(ioa_cfg);
8209 		return;
8210 	}
8211 
8212 	memset(&sdt, 0, sizeof(struct ipr_uc_sdt));
8213 	rc = ipr_get_ldump_data_section(ioa_cfg, mailbox, (__be32 *) &sdt,
8214 					(sizeof(struct ipr_uc_sdt)) / sizeof(__be32));
8215 
8216 	if (rc || !(sdt.entry[0].flags & IPR_SDT_VALID_ENTRY) ||
8217 	    ((be32_to_cpu(sdt.hdr.state) != IPR_FMT3_SDT_READY_TO_USE) &&
8218 	    (be32_to_cpu(sdt.hdr.state) != IPR_FMT2_SDT_READY_TO_USE))) {
8219 		ipr_unit_check_no_data(ioa_cfg);
8220 		return;
8221 	}
8222 
8223 	/* Find length of the first sdt entry (UC buffer) */
8224 	if (be32_to_cpu(sdt.hdr.state) == IPR_FMT3_SDT_READY_TO_USE)
8225 		length = be32_to_cpu(sdt.entry[0].end_token);
8226 	else
8227 		length = (be32_to_cpu(sdt.entry[0].end_token) -
8228 			  be32_to_cpu(sdt.entry[0].start_token)) &
8229 			  IPR_FMT2_MBX_ADDR_MASK;
8230 
8231 	hostrcb = list_entry(ioa_cfg->hostrcb_free_q.next,
8232 			     struct ipr_hostrcb, queue);
8233 	list_del(&hostrcb->queue);
8234 	memset(&hostrcb->hcam, 0, sizeof(hostrcb->hcam));
8235 
8236 	rc = ipr_get_ldump_data_section(ioa_cfg,
8237 					be32_to_cpu(sdt.entry[0].start_token),
8238 					(__be32 *)&hostrcb->hcam,
8239 					min(length, (int)sizeof(hostrcb->hcam)) / sizeof(__be32));
8240 
8241 	if (!rc) {
8242 		ipr_handle_log_data(ioa_cfg, hostrcb);
8243 		ioasc = be32_to_cpu(hostrcb->hcam.u.error.fd_ioasc);
8244 		if (ioasc == IPR_IOASC_NR_IOA_RESET_REQUIRED &&
8245 		    ioa_cfg->sdt_state == GET_DUMP)
8246 			ioa_cfg->sdt_state = WAIT_FOR_DUMP;
8247 	} else
8248 		ipr_unit_check_no_data(ioa_cfg);
8249 
8250 	list_add_tail(&hostrcb->queue, &ioa_cfg->hostrcb_free_q);
8251 }
8252 
8253 /**
8254  * ipr_reset_get_unit_check_job - Call to get the unit check buffer.
8255  * @ipr_cmd:	ipr command struct
8256  *
8257  * Description: This function will call to get the unit check buffer.
8258  *
8259  * Return value:
8260  *	IPR_RC_JOB_RETURN
8261  **/
8262 static int ipr_reset_get_unit_check_job(struct ipr_cmnd *ipr_cmd)
8263 {
8264 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8265 
8266 	ENTER;
8267 	ioa_cfg->ioa_unit_checked = 0;
8268 	ipr_get_unit_check_buffer(ioa_cfg);
8269 	ipr_cmd->job_step = ipr_reset_alert;
8270 	ipr_reset_start_timer(ipr_cmd, 0);
8271 
8272 	LEAVE;
8273 	return IPR_RC_JOB_RETURN;
8274 }
8275 
8276 /**
8277  * ipr_reset_restore_cfg_space - Restore PCI config space.
8278  * @ipr_cmd:	ipr command struct
8279  *
8280  * Description: This function restores the saved PCI config space of
8281  * the adapter, fails all outstanding ops back to the callers, and
8282  * fetches the dump/unit check if applicable to this reset.
8283  *
8284  * Return value:
8285  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
8286  **/
8287 static int ipr_reset_restore_cfg_space(struct ipr_cmnd *ipr_cmd)
8288 {
8289 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8290 	u32 int_reg;
8291 
8292 	ENTER;
8293 	ioa_cfg->pdev->state_saved = true;
8294 	pci_restore_state(ioa_cfg->pdev);
8295 
8296 	if (ipr_set_pcix_cmd_reg(ioa_cfg)) {
8297 		ipr_cmd->s.ioasa.hdr.ioasc = cpu_to_be32(IPR_IOASC_PCI_ACCESS_ERROR);
8298 		return IPR_RC_JOB_CONTINUE;
8299 	}
8300 
8301 	ipr_fail_all_ops(ioa_cfg);
8302 
8303 	if (ioa_cfg->sis64) {
8304 		/* Set the adapter to the correct endian mode. */
8305 		writel(IPR_ENDIAN_SWAP_KEY, ioa_cfg->regs.endian_swap_reg);
8306 		int_reg = readl(ioa_cfg->regs.endian_swap_reg);
8307 	}
8308 
8309 	if (ioa_cfg->ioa_unit_checked) {
8310 		if (ioa_cfg->sis64) {
8311 			ipr_cmd->job_step = ipr_reset_get_unit_check_job;
8312 			ipr_reset_start_timer(ipr_cmd, IPR_DUMP_DELAY_TIMEOUT);
8313 			return IPR_RC_JOB_RETURN;
8314 		} else {
8315 			ioa_cfg->ioa_unit_checked = 0;
8316 			ipr_get_unit_check_buffer(ioa_cfg);
8317 			ipr_cmd->job_step = ipr_reset_alert;
8318 			ipr_reset_start_timer(ipr_cmd, 0);
8319 			return IPR_RC_JOB_RETURN;
8320 		}
8321 	}
8322 
8323 	if (ioa_cfg->in_ioa_bringdown) {
8324 		ipr_cmd->job_step = ipr_ioa_bringdown_done;
8325 	} else {
8326 		ipr_cmd->job_step = ipr_reset_enable_ioa;
8327 
8328 		if (GET_DUMP == ioa_cfg->sdt_state) {
8329 			ioa_cfg->sdt_state = READ_DUMP;
8330 			ioa_cfg->dump_timeout = 0;
8331 			if (ioa_cfg->sis64)
8332 				ipr_reset_start_timer(ipr_cmd, IPR_SIS64_DUMP_TIMEOUT);
8333 			else
8334 				ipr_reset_start_timer(ipr_cmd, IPR_SIS32_DUMP_TIMEOUT);
8335 			ipr_cmd->job_step = ipr_reset_wait_for_dump;
8336 			schedule_work(&ioa_cfg->work_q);
8337 			return IPR_RC_JOB_RETURN;
8338 		}
8339 	}
8340 
8341 	LEAVE;
8342 	return IPR_RC_JOB_CONTINUE;
8343 }
8344 
8345 /**
8346  * ipr_reset_bist_done - BIST has completed on the adapter.
8347  * @ipr_cmd:	ipr command struct
8348  *
8349  * Description: Unblock config space and resume the reset process.
8350  *
8351  * Return value:
8352  * 	IPR_RC_JOB_CONTINUE
8353  **/
8354 static int ipr_reset_bist_done(struct ipr_cmnd *ipr_cmd)
8355 {
8356 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8357 
8358 	ENTER;
8359 	if (ioa_cfg->cfg_locked)
8360 		pci_cfg_access_unlock(ioa_cfg->pdev);
8361 	ioa_cfg->cfg_locked = 0;
8362 	ipr_cmd->job_step = ipr_reset_restore_cfg_space;
8363 	LEAVE;
8364 	return IPR_RC_JOB_CONTINUE;
8365 }
8366 
8367 /**
8368  * ipr_reset_start_bist - Run BIST on the adapter.
8369  * @ipr_cmd:	ipr command struct
8370  *
8371  * Description: This function runs BIST on the adapter, then delays 2 seconds.
8372  *
8373  * Return value:
8374  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
8375  **/
8376 static int ipr_reset_start_bist(struct ipr_cmnd *ipr_cmd)
8377 {
8378 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8379 	int rc = PCIBIOS_SUCCESSFUL;
8380 
8381 	ENTER;
8382 	if (ioa_cfg->ipr_chip->bist_method == IPR_MMIO)
8383 		writel(IPR_UPROCI_SIS64_START_BIST,
8384 		       ioa_cfg->regs.set_uproc_interrupt_reg32);
8385 	else
8386 		rc = pci_write_config_byte(ioa_cfg->pdev, PCI_BIST, PCI_BIST_START);
8387 
8388 	if (rc == PCIBIOS_SUCCESSFUL) {
8389 		ipr_cmd->job_step = ipr_reset_bist_done;
8390 		ipr_reset_start_timer(ipr_cmd, IPR_WAIT_FOR_BIST_TIMEOUT);
8391 		rc = IPR_RC_JOB_RETURN;
8392 	} else {
8393 		if (ioa_cfg->cfg_locked)
8394 			pci_cfg_access_unlock(ipr_cmd->ioa_cfg->pdev);
8395 		ioa_cfg->cfg_locked = 0;
8396 		ipr_cmd->s.ioasa.hdr.ioasc = cpu_to_be32(IPR_IOASC_PCI_ACCESS_ERROR);
8397 		rc = IPR_RC_JOB_CONTINUE;
8398 	}
8399 
8400 	LEAVE;
8401 	return rc;
8402 }
8403 
8404 /**
8405  * ipr_reset_slot_reset_done - Clear PCI reset to the adapter
8406  * @ipr_cmd:	ipr command struct
8407  *
8408  * Description: This clears PCI reset to the adapter and delays two seconds.
8409  *
8410  * Return value:
8411  * 	IPR_RC_JOB_RETURN
8412  **/
8413 static int ipr_reset_slot_reset_done(struct ipr_cmnd *ipr_cmd)
8414 {
8415 	ENTER;
8416 	ipr_cmd->job_step = ipr_reset_bist_done;
8417 	ipr_reset_start_timer(ipr_cmd, IPR_WAIT_FOR_BIST_TIMEOUT);
8418 	LEAVE;
8419 	return IPR_RC_JOB_RETURN;
8420 }
8421 
8422 /**
8423  * ipr_reset_reset_work - Pulse a PCIe fundamental reset
8424  * @work:	work struct
8425  *
8426  * Description: This pulses warm reset to a slot.
8427  *
8428  **/
8429 static void ipr_reset_reset_work(struct work_struct *work)
8430 {
8431 	struct ipr_cmnd *ipr_cmd = container_of(work, struct ipr_cmnd, work);
8432 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8433 	struct pci_dev *pdev = ioa_cfg->pdev;
8434 	unsigned long lock_flags = 0;
8435 
8436 	ENTER;
8437 	pci_set_pcie_reset_state(pdev, pcie_warm_reset);
8438 	msleep(jiffies_to_msecs(IPR_PCI_RESET_TIMEOUT));
8439 	pci_set_pcie_reset_state(pdev, pcie_deassert_reset);
8440 
8441 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
8442 	if (ioa_cfg->reset_cmd == ipr_cmd)
8443 		ipr_reset_ioa_job(ipr_cmd);
8444 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
8445 	LEAVE;
8446 }
8447 
8448 /**
8449  * ipr_reset_slot_reset - Reset the PCI slot of the adapter.
8450  * @ipr_cmd:	ipr command struct
8451  *
8452  * Description: This asserts PCI reset to the adapter.
8453  *
8454  * Return value:
8455  * 	IPR_RC_JOB_RETURN
8456  **/
8457 static int ipr_reset_slot_reset(struct ipr_cmnd *ipr_cmd)
8458 {
8459 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8460 
8461 	ENTER;
8462 	INIT_WORK(&ipr_cmd->work, ipr_reset_reset_work);
8463 	queue_work(ioa_cfg->reset_work_q, &ipr_cmd->work);
8464 	ipr_cmd->job_step = ipr_reset_slot_reset_done;
8465 	LEAVE;
8466 	return IPR_RC_JOB_RETURN;
8467 }
8468 
8469 /**
8470  * ipr_reset_block_config_access_wait - Wait for permission to block config access
8471  * @ipr_cmd:	ipr command struct
8472  *
8473  * Description: This attempts to block config access to the IOA.
8474  *
8475  * Return value:
8476  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
8477  **/
8478 static int ipr_reset_block_config_access_wait(struct ipr_cmnd *ipr_cmd)
8479 {
8480 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8481 	int rc = IPR_RC_JOB_CONTINUE;
8482 
8483 	if (pci_cfg_access_trylock(ioa_cfg->pdev)) {
8484 		ioa_cfg->cfg_locked = 1;
8485 		ipr_cmd->job_step = ioa_cfg->reset;
8486 	} else {
8487 		if (ipr_cmd->u.time_left) {
8488 			rc = IPR_RC_JOB_RETURN;
8489 			ipr_cmd->u.time_left -= IPR_CHECK_FOR_RESET_TIMEOUT;
8490 			ipr_reset_start_timer(ipr_cmd,
8491 					      IPR_CHECK_FOR_RESET_TIMEOUT);
8492 		} else {
8493 			ipr_cmd->job_step = ioa_cfg->reset;
8494 			dev_err(&ioa_cfg->pdev->dev,
8495 				"Timed out waiting to lock config access. Resetting anyway.\n");
8496 		}
8497 	}
8498 
8499 	return rc;
8500 }
8501 
8502 /**
8503  * ipr_reset_block_config_access - Block config access to the IOA
8504  * @ipr_cmd:	ipr command struct
8505  *
8506  * Description: This attempts to block config access to the IOA
8507  *
8508  * Return value:
8509  * 	IPR_RC_JOB_CONTINUE
8510  **/
8511 static int ipr_reset_block_config_access(struct ipr_cmnd *ipr_cmd)
8512 {
8513 	ipr_cmd->ioa_cfg->cfg_locked = 0;
8514 	ipr_cmd->job_step = ipr_reset_block_config_access_wait;
8515 	ipr_cmd->u.time_left = IPR_WAIT_FOR_RESET_TIMEOUT;
8516 	return IPR_RC_JOB_CONTINUE;
8517 }
8518 
8519 /**
8520  * ipr_reset_allowed - Query whether or not IOA can be reset
8521  * @ioa_cfg:	ioa config struct
8522  *
8523  * Return value:
8524  * 	0 if reset not allowed / non-zero if reset is allowed
8525  **/
8526 static int ipr_reset_allowed(struct ipr_ioa_cfg *ioa_cfg)
8527 {
8528 	volatile u32 temp_reg;
8529 
8530 	temp_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
8531 	return ((temp_reg & IPR_PCII_CRITICAL_OPERATION) == 0);
8532 }
8533 
8534 /**
8535  * ipr_reset_wait_to_start_bist - Wait for permission to reset IOA.
8536  * @ipr_cmd:	ipr command struct
8537  *
8538  * Description: This function waits for adapter permission to run BIST,
8539  * then runs BIST. If the adapter does not give permission after a
8540  * reasonable time, we will reset the adapter anyway. The impact of
8541  * resetting the adapter without warning the adapter is the risk of
8542  * losing the persistent error log on the adapter. If the adapter is
8543  * reset while it is writing to the flash on the adapter, the flash
8544  * segment will have bad ECC and be zeroed.
8545  *
8546  * Return value:
8547  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
8548  **/
8549 static int ipr_reset_wait_to_start_bist(struct ipr_cmnd *ipr_cmd)
8550 {
8551 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8552 	int rc = IPR_RC_JOB_RETURN;
8553 
8554 	if (!ipr_reset_allowed(ioa_cfg) && ipr_cmd->u.time_left) {
8555 		ipr_cmd->u.time_left -= IPR_CHECK_FOR_RESET_TIMEOUT;
8556 		ipr_reset_start_timer(ipr_cmd, IPR_CHECK_FOR_RESET_TIMEOUT);
8557 	} else {
8558 		ipr_cmd->job_step = ipr_reset_block_config_access;
8559 		rc = IPR_RC_JOB_CONTINUE;
8560 	}
8561 
8562 	return rc;
8563 }
8564 
8565 /**
8566  * ipr_reset_alert - Alert the adapter of a pending reset
8567  * @ipr_cmd:	ipr command struct
8568  *
8569  * Description: This function alerts the adapter that it will be reset.
8570  * If memory space is not currently enabled, proceed directly
8571  * to running BIST on the adapter. The timer must always be started
8572  * so we guarantee we do not run BIST from ipr_isr.
8573  *
8574  * Return value:
8575  * 	IPR_RC_JOB_RETURN
8576  **/
8577 static int ipr_reset_alert(struct ipr_cmnd *ipr_cmd)
8578 {
8579 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8580 	u16 cmd_reg;
8581 	int rc;
8582 
8583 	ENTER;
8584 	rc = pci_read_config_word(ioa_cfg->pdev, PCI_COMMAND, &cmd_reg);
8585 
8586 	if ((rc == PCIBIOS_SUCCESSFUL) && (cmd_reg & PCI_COMMAND_MEMORY)) {
8587 		ipr_mask_and_clear_interrupts(ioa_cfg, ~0);
8588 		writel(IPR_UPROCI_RESET_ALERT, ioa_cfg->regs.set_uproc_interrupt_reg32);
8589 		ipr_cmd->job_step = ipr_reset_wait_to_start_bist;
8590 	} else {
8591 		ipr_cmd->job_step = ipr_reset_block_config_access;
8592 	}
8593 
8594 	ipr_cmd->u.time_left = IPR_WAIT_FOR_RESET_TIMEOUT;
8595 	ipr_reset_start_timer(ipr_cmd, IPR_CHECK_FOR_RESET_TIMEOUT);
8596 
8597 	LEAVE;
8598 	return IPR_RC_JOB_RETURN;
8599 }
8600 
8601 /**
8602  * ipr_reset_quiesce_done - Complete IOA disconnect
8603  * @ipr_cmd:	ipr command struct
8604  *
8605  * Description: Freeze the adapter to complete quiesce processing
8606  *
8607  * Return value:
8608  * 	IPR_RC_JOB_CONTINUE
8609  **/
8610 static int ipr_reset_quiesce_done(struct ipr_cmnd *ipr_cmd)
8611 {
8612 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8613 
8614 	ENTER;
8615 	ipr_cmd->job_step = ipr_ioa_bringdown_done;
8616 	ipr_mask_and_clear_interrupts(ioa_cfg, ~IPR_PCII_IOA_TRANS_TO_OPER);
8617 	LEAVE;
8618 	return IPR_RC_JOB_CONTINUE;
8619 }
8620 
8621 /**
8622  * ipr_reset_cancel_hcam_done - Check for outstanding commands
8623  * @ipr_cmd:	ipr command struct
8624  *
8625  * Description: Ensure nothing is outstanding to the IOA and
8626  *			proceed with IOA disconnect. Otherwise reset the IOA.
8627  *
8628  * Return value:
8629  * 	IPR_RC_JOB_RETURN / IPR_RC_JOB_CONTINUE
8630  **/
8631 static int ipr_reset_cancel_hcam_done(struct ipr_cmnd *ipr_cmd)
8632 {
8633 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8634 	struct ipr_cmnd *loop_cmd;
8635 	struct ipr_hrr_queue *hrrq;
8636 	int rc = IPR_RC_JOB_CONTINUE;
8637 	int count = 0;
8638 
8639 	ENTER;
8640 	ipr_cmd->job_step = ipr_reset_quiesce_done;
8641 
8642 	for_each_hrrq(hrrq, ioa_cfg) {
8643 		spin_lock(&hrrq->_lock);
8644 		list_for_each_entry(loop_cmd, &hrrq->hrrq_pending_q, queue) {
8645 			count++;
8646 			ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
8647 			list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
8648 			rc = IPR_RC_JOB_RETURN;
8649 			break;
8650 		}
8651 		spin_unlock(&hrrq->_lock);
8652 
8653 		if (count)
8654 			break;
8655 	}
8656 
8657 	LEAVE;
8658 	return rc;
8659 }
8660 
8661 /**
8662  * ipr_reset_cancel_hcam - Cancel outstanding HCAMs
8663  * @ipr_cmd:	ipr command struct
8664  *
8665  * Description: Cancel any oustanding HCAMs to the IOA.
8666  *
8667  * Return value:
8668  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
8669  **/
8670 static int ipr_reset_cancel_hcam(struct ipr_cmnd *ipr_cmd)
8671 {
8672 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8673 	int rc = IPR_RC_JOB_CONTINUE;
8674 	struct ipr_cmd_pkt *cmd_pkt;
8675 	struct ipr_cmnd *hcam_cmd;
8676 	struct ipr_hrr_queue *hrrq = &ioa_cfg->hrrq[IPR_INIT_HRRQ];
8677 
8678 	ENTER;
8679 	ipr_cmd->job_step = ipr_reset_cancel_hcam_done;
8680 
8681 	if (!hrrq->ioa_is_dead) {
8682 		if (!list_empty(&ioa_cfg->hostrcb_pending_q)) {
8683 			list_for_each_entry(hcam_cmd, &hrrq->hrrq_pending_q, queue) {
8684 				if (hcam_cmd->ioarcb.cmd_pkt.cdb[0] != IPR_HOST_CONTROLLED_ASYNC)
8685 					continue;
8686 
8687 				ipr_cmd->ioarcb.res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
8688 				ipr_cmd->ioarcb.cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
8689 				cmd_pkt = &ipr_cmd->ioarcb.cmd_pkt;
8690 				cmd_pkt->request_type = IPR_RQTYPE_IOACMD;
8691 				cmd_pkt->cdb[0] = IPR_CANCEL_REQUEST;
8692 				cmd_pkt->cdb[1] = IPR_CANCEL_64BIT_IOARCB;
8693 				cmd_pkt->cdb[10] = ((u64) hcam_cmd->dma_addr >> 56) & 0xff;
8694 				cmd_pkt->cdb[11] = ((u64) hcam_cmd->dma_addr >> 48) & 0xff;
8695 				cmd_pkt->cdb[12] = ((u64) hcam_cmd->dma_addr >> 40) & 0xff;
8696 				cmd_pkt->cdb[13] = ((u64) hcam_cmd->dma_addr >> 32) & 0xff;
8697 				cmd_pkt->cdb[2] = ((u64) hcam_cmd->dma_addr >> 24) & 0xff;
8698 				cmd_pkt->cdb[3] = ((u64) hcam_cmd->dma_addr >> 16) & 0xff;
8699 				cmd_pkt->cdb[4] = ((u64) hcam_cmd->dma_addr >> 8) & 0xff;
8700 				cmd_pkt->cdb[5] = ((u64) hcam_cmd->dma_addr) & 0xff;
8701 
8702 				ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout,
8703 					   IPR_CANCEL_TIMEOUT);
8704 
8705 				rc = IPR_RC_JOB_RETURN;
8706 				ipr_cmd->job_step = ipr_reset_cancel_hcam;
8707 				break;
8708 			}
8709 		}
8710 	} else
8711 		ipr_cmd->job_step = ipr_reset_alert;
8712 
8713 	LEAVE;
8714 	return rc;
8715 }
8716 
8717 /**
8718  * ipr_reset_ucode_download_done - Microcode download completion
8719  * @ipr_cmd:	ipr command struct
8720  *
8721  * Description: This function unmaps the microcode download buffer.
8722  *
8723  * Return value:
8724  * 	IPR_RC_JOB_CONTINUE
8725  **/
8726 static int ipr_reset_ucode_download_done(struct ipr_cmnd *ipr_cmd)
8727 {
8728 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8729 	struct ipr_sglist *sglist = ioa_cfg->ucode_sglist;
8730 
8731 	dma_unmap_sg(&ioa_cfg->pdev->dev, sglist->scatterlist,
8732 		     sglist->num_sg, DMA_TO_DEVICE);
8733 
8734 	ipr_cmd->job_step = ipr_reset_alert;
8735 	return IPR_RC_JOB_CONTINUE;
8736 }
8737 
8738 /**
8739  * ipr_reset_ucode_download - Download microcode to the adapter
8740  * @ipr_cmd:	ipr command struct
8741  *
8742  * Description: This function checks to see if it there is microcode
8743  * to download to the adapter. If there is, a download is performed.
8744  *
8745  * Return value:
8746  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
8747  **/
8748 static int ipr_reset_ucode_download(struct ipr_cmnd *ipr_cmd)
8749 {
8750 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8751 	struct ipr_sglist *sglist = ioa_cfg->ucode_sglist;
8752 
8753 	ENTER;
8754 	ipr_cmd->job_step = ipr_reset_alert;
8755 
8756 	if (!sglist)
8757 		return IPR_RC_JOB_CONTINUE;
8758 
8759 	ipr_cmd->ioarcb.res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
8760 	ipr_cmd->ioarcb.cmd_pkt.request_type = IPR_RQTYPE_SCSICDB;
8761 	ipr_cmd->ioarcb.cmd_pkt.cdb[0] = WRITE_BUFFER;
8762 	ipr_cmd->ioarcb.cmd_pkt.cdb[1] = IPR_WR_BUF_DOWNLOAD_AND_SAVE;
8763 	ipr_cmd->ioarcb.cmd_pkt.cdb[6] = (sglist->buffer_len & 0xff0000) >> 16;
8764 	ipr_cmd->ioarcb.cmd_pkt.cdb[7] = (sglist->buffer_len & 0x00ff00) >> 8;
8765 	ipr_cmd->ioarcb.cmd_pkt.cdb[8] = sglist->buffer_len & 0x0000ff;
8766 
8767 	if (ioa_cfg->sis64)
8768 		ipr_build_ucode_ioadl64(ipr_cmd, sglist);
8769 	else
8770 		ipr_build_ucode_ioadl(ipr_cmd, sglist);
8771 	ipr_cmd->job_step = ipr_reset_ucode_download_done;
8772 
8773 	ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout,
8774 		   IPR_WRITE_BUFFER_TIMEOUT);
8775 
8776 	LEAVE;
8777 	return IPR_RC_JOB_RETURN;
8778 }
8779 
8780 /**
8781  * ipr_reset_shutdown_ioa - Shutdown the adapter
8782  * @ipr_cmd:	ipr command struct
8783  *
8784  * Description: This function issues an adapter shutdown of the
8785  * specified type to the specified adapter as part of the
8786  * adapter reset job.
8787  *
8788  * Return value:
8789  * 	IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
8790  **/
8791 static int ipr_reset_shutdown_ioa(struct ipr_cmnd *ipr_cmd)
8792 {
8793 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8794 	enum ipr_shutdown_type shutdown_type = ipr_cmd->u.shutdown_type;
8795 	unsigned long timeout;
8796 	int rc = IPR_RC_JOB_CONTINUE;
8797 
8798 	ENTER;
8799 	if (shutdown_type == IPR_SHUTDOWN_QUIESCE)
8800 		ipr_cmd->job_step = ipr_reset_cancel_hcam;
8801 	else if (shutdown_type != IPR_SHUTDOWN_NONE &&
8802 			!ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead) {
8803 		ipr_cmd->ioarcb.res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
8804 		ipr_cmd->ioarcb.cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
8805 		ipr_cmd->ioarcb.cmd_pkt.cdb[0] = IPR_IOA_SHUTDOWN;
8806 		ipr_cmd->ioarcb.cmd_pkt.cdb[1] = shutdown_type;
8807 
8808 		if (shutdown_type == IPR_SHUTDOWN_NORMAL)
8809 			timeout = IPR_SHUTDOWN_TIMEOUT;
8810 		else if (shutdown_type == IPR_SHUTDOWN_PREPARE_FOR_NORMAL)
8811 			timeout = IPR_INTERNAL_TIMEOUT;
8812 		else if (ioa_cfg->dual_raid && ipr_dual_ioa_raid)
8813 			timeout = IPR_DUAL_IOA_ABBR_SHUTDOWN_TO;
8814 		else
8815 			timeout = IPR_ABBREV_SHUTDOWN_TIMEOUT;
8816 
8817 		ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, timeout);
8818 
8819 		rc = IPR_RC_JOB_RETURN;
8820 		ipr_cmd->job_step = ipr_reset_ucode_download;
8821 	} else
8822 		ipr_cmd->job_step = ipr_reset_alert;
8823 
8824 	LEAVE;
8825 	return rc;
8826 }
8827 
8828 /**
8829  * ipr_reset_ioa_job - Adapter reset job
8830  * @ipr_cmd:	ipr command struct
8831  *
8832  * Description: This function is the job router for the adapter reset job.
8833  *
8834  * Return value:
8835  * 	none
8836  **/
8837 static void ipr_reset_ioa_job(struct ipr_cmnd *ipr_cmd)
8838 {
8839 	u32 rc, ioasc;
8840 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8841 
8842 	do {
8843 		ioasc = be32_to_cpu(ipr_cmd->s.ioasa.hdr.ioasc);
8844 
8845 		if (ioa_cfg->reset_cmd != ipr_cmd) {
8846 			/*
8847 			 * We are doing nested adapter resets and this is
8848 			 * not the current reset job.
8849 			 */
8850 			list_add_tail(&ipr_cmd->queue,
8851 					&ipr_cmd->hrrq->hrrq_free_q);
8852 			return;
8853 		}
8854 
8855 		if (IPR_IOASC_SENSE_KEY(ioasc)) {
8856 			rc = ipr_cmd->job_step_failed(ipr_cmd);
8857 			if (rc == IPR_RC_JOB_RETURN)
8858 				return;
8859 		}
8860 
8861 		ipr_reinit_ipr_cmnd(ipr_cmd);
8862 		ipr_cmd->job_step_failed = ipr_reset_cmd_failed;
8863 		rc = ipr_cmd->job_step(ipr_cmd);
8864 	} while (rc == IPR_RC_JOB_CONTINUE);
8865 }
8866 
8867 /**
8868  * _ipr_initiate_ioa_reset - Initiate an adapter reset
8869  * @ioa_cfg:		ioa config struct
8870  * @job_step:		first job step of reset job
8871  * @shutdown_type:	shutdown type
8872  *
8873  * Description: This function will initiate the reset of the given adapter
8874  * starting at the selected job step.
8875  * If the caller needs to wait on the completion of the reset,
8876  * the caller must sleep on the reset_wait_q.
8877  *
8878  * Return value:
8879  * 	none
8880  **/
8881 static void _ipr_initiate_ioa_reset(struct ipr_ioa_cfg *ioa_cfg,
8882 				    int (*job_step) (struct ipr_cmnd *),
8883 				    enum ipr_shutdown_type shutdown_type)
8884 {
8885 	struct ipr_cmnd *ipr_cmd;
8886 	int i;
8887 
8888 	ioa_cfg->in_reset_reload = 1;
8889 	for (i = 0; i < ioa_cfg->hrrq_num; i++) {
8890 		spin_lock(&ioa_cfg->hrrq[i]._lock);
8891 		ioa_cfg->hrrq[i].allow_cmds = 0;
8892 		spin_unlock(&ioa_cfg->hrrq[i]._lock);
8893 	}
8894 	wmb();
8895 	if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].removing_ioa)
8896 		scsi_block_requests(ioa_cfg->host);
8897 
8898 	ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
8899 	ioa_cfg->reset_cmd = ipr_cmd;
8900 	ipr_cmd->job_step = job_step;
8901 	ipr_cmd->u.shutdown_type = shutdown_type;
8902 
8903 	ipr_reset_ioa_job(ipr_cmd);
8904 }
8905 
8906 /**
8907  * ipr_initiate_ioa_reset - Initiate an adapter reset
8908  * @ioa_cfg:		ioa config struct
8909  * @shutdown_type:	shutdown type
8910  *
8911  * Description: This function will initiate the reset of the given adapter.
8912  * If the caller needs to wait on the completion of the reset,
8913  * the caller must sleep on the reset_wait_q.
8914  *
8915  * Return value:
8916  * 	none
8917  **/
8918 static void ipr_initiate_ioa_reset(struct ipr_ioa_cfg *ioa_cfg,
8919 				   enum ipr_shutdown_type shutdown_type)
8920 {
8921 	int i;
8922 
8923 	if (ioa_cfg->hrrq[IPR_INIT_HRRQ].ioa_is_dead)
8924 		return;
8925 
8926 	if (ioa_cfg->in_reset_reload) {
8927 		if (ioa_cfg->sdt_state == GET_DUMP)
8928 			ioa_cfg->sdt_state = WAIT_FOR_DUMP;
8929 		else if (ioa_cfg->sdt_state == READ_DUMP)
8930 			ioa_cfg->sdt_state = ABORT_DUMP;
8931 	}
8932 
8933 	if (ioa_cfg->reset_retries++ >= IPR_NUM_RESET_RELOAD_RETRIES) {
8934 		dev_err(&ioa_cfg->pdev->dev,
8935 			"IOA taken offline - error recovery failed\n");
8936 
8937 		ioa_cfg->reset_retries = 0;
8938 		for (i = 0; i < ioa_cfg->hrrq_num; i++) {
8939 			spin_lock(&ioa_cfg->hrrq[i]._lock);
8940 			ioa_cfg->hrrq[i].ioa_is_dead = 1;
8941 			spin_unlock(&ioa_cfg->hrrq[i]._lock);
8942 		}
8943 		wmb();
8944 
8945 		if (ioa_cfg->in_ioa_bringdown) {
8946 			ioa_cfg->reset_cmd = NULL;
8947 			ioa_cfg->in_reset_reload = 0;
8948 			ipr_fail_all_ops(ioa_cfg);
8949 			wake_up_all(&ioa_cfg->reset_wait_q);
8950 
8951 			if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].removing_ioa) {
8952 				spin_unlock_irq(ioa_cfg->host->host_lock);
8953 				scsi_unblock_requests(ioa_cfg->host);
8954 				spin_lock_irq(ioa_cfg->host->host_lock);
8955 			}
8956 			return;
8957 		} else {
8958 			ioa_cfg->in_ioa_bringdown = 1;
8959 			shutdown_type = IPR_SHUTDOWN_NONE;
8960 		}
8961 	}
8962 
8963 	_ipr_initiate_ioa_reset(ioa_cfg, ipr_reset_shutdown_ioa,
8964 				shutdown_type);
8965 }
8966 
8967 /**
8968  * ipr_reset_freeze - Hold off all I/O activity
8969  * @ipr_cmd:	ipr command struct
8970  *
8971  * Description: If the PCI slot is frozen, hold off all I/O
8972  * activity; then, as soon as the slot is available again,
8973  * initiate an adapter reset.
8974  */
8975 static int ipr_reset_freeze(struct ipr_cmnd *ipr_cmd)
8976 {
8977 	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
8978 	int i;
8979 
8980 	/* Disallow new interrupts, avoid loop */
8981 	for (i = 0; i < ioa_cfg->hrrq_num; i++) {
8982 		spin_lock(&ioa_cfg->hrrq[i]._lock);
8983 		ioa_cfg->hrrq[i].allow_interrupts = 0;
8984 		spin_unlock(&ioa_cfg->hrrq[i]._lock);
8985 	}
8986 	wmb();
8987 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_pending_q);
8988 	ipr_cmd->done = ipr_reset_ioa_job;
8989 	return IPR_RC_JOB_RETURN;
8990 }
8991 
8992 /**
8993  * ipr_pci_mmio_enabled - Called when MMIO has been re-enabled
8994  * @pdev:	PCI device struct
8995  *
8996  * Description: This routine is called to tell us that the MMIO
8997  * access to the IOA has been restored
8998  */
8999 static pci_ers_result_t ipr_pci_mmio_enabled(struct pci_dev *pdev)
9000 {
9001 	unsigned long flags = 0;
9002 	struct ipr_ioa_cfg *ioa_cfg = pci_get_drvdata(pdev);
9003 
9004 	spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
9005 	if (!ioa_cfg->probe_done)
9006 		pci_save_state(pdev);
9007 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
9008 	return PCI_ERS_RESULT_NEED_RESET;
9009 }
9010 
9011 /**
9012  * ipr_pci_frozen - Called when slot has experienced a PCI bus error.
9013  * @pdev:	PCI device struct
9014  *
9015  * Description: This routine is called to tell us that the PCI bus
9016  * is down. Can't do anything here, except put the device driver
9017  * into a holding pattern, waiting for the PCI bus to come back.
9018  */
9019 static void ipr_pci_frozen(struct pci_dev *pdev)
9020 {
9021 	unsigned long flags = 0;
9022 	struct ipr_ioa_cfg *ioa_cfg = pci_get_drvdata(pdev);
9023 
9024 	spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
9025 	if (ioa_cfg->probe_done)
9026 		_ipr_initiate_ioa_reset(ioa_cfg, ipr_reset_freeze, IPR_SHUTDOWN_NONE);
9027 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
9028 }
9029 
9030 /**
9031  * ipr_pci_slot_reset - Called when PCI slot has been reset.
9032  * @pdev:	PCI device struct
9033  *
9034  * Description: This routine is called by the pci error recovery
9035  * code after the PCI slot has been reset, just before we
9036  * should resume normal operations.
9037  */
9038 static pci_ers_result_t ipr_pci_slot_reset(struct pci_dev *pdev)
9039 {
9040 	unsigned long flags = 0;
9041 	struct ipr_ioa_cfg *ioa_cfg = pci_get_drvdata(pdev);
9042 
9043 	spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
9044 	if (ioa_cfg->probe_done) {
9045 		if (ioa_cfg->needs_warm_reset)
9046 			ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
9047 		else
9048 			_ipr_initiate_ioa_reset(ioa_cfg, ipr_reset_restore_cfg_space,
9049 						IPR_SHUTDOWN_NONE);
9050 	} else
9051 		wake_up_all(&ioa_cfg->eeh_wait_q);
9052 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
9053 	return PCI_ERS_RESULT_RECOVERED;
9054 }
9055 
9056 /**
9057  * ipr_pci_perm_failure - Called when PCI slot is dead for good.
9058  * @pdev:	PCI device struct
9059  *
9060  * Description: This routine is called when the PCI bus has
9061  * permanently failed.
9062  */
9063 static void ipr_pci_perm_failure(struct pci_dev *pdev)
9064 {
9065 	unsigned long flags = 0;
9066 	struct ipr_ioa_cfg *ioa_cfg = pci_get_drvdata(pdev);
9067 	int i;
9068 
9069 	spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
9070 	if (ioa_cfg->probe_done) {
9071 		if (ioa_cfg->sdt_state == WAIT_FOR_DUMP)
9072 			ioa_cfg->sdt_state = ABORT_DUMP;
9073 		ioa_cfg->reset_retries = IPR_NUM_RESET_RELOAD_RETRIES - 1;
9074 		ioa_cfg->in_ioa_bringdown = 1;
9075 		for (i = 0; i < ioa_cfg->hrrq_num; i++) {
9076 			spin_lock(&ioa_cfg->hrrq[i]._lock);
9077 			ioa_cfg->hrrq[i].allow_cmds = 0;
9078 			spin_unlock(&ioa_cfg->hrrq[i]._lock);
9079 		}
9080 		wmb();
9081 		ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
9082 	} else
9083 		wake_up_all(&ioa_cfg->eeh_wait_q);
9084 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
9085 }
9086 
9087 /**
9088  * ipr_pci_error_detected - Called when a PCI error is detected.
9089  * @pdev:	PCI device struct
9090  * @state:	PCI channel state
9091  *
9092  * Description: Called when a PCI error is detected.
9093  *
9094  * Return value:
9095  * 	PCI_ERS_RESULT_NEED_RESET or PCI_ERS_RESULT_DISCONNECT
9096  */
9097 static pci_ers_result_t ipr_pci_error_detected(struct pci_dev *pdev,
9098 					       pci_channel_state_t state)
9099 {
9100 	switch (state) {
9101 	case pci_channel_io_frozen:
9102 		ipr_pci_frozen(pdev);
9103 		return PCI_ERS_RESULT_CAN_RECOVER;
9104 	case pci_channel_io_perm_failure:
9105 		ipr_pci_perm_failure(pdev);
9106 		return PCI_ERS_RESULT_DISCONNECT;
9107 		break;
9108 	default:
9109 		break;
9110 	}
9111 	return PCI_ERS_RESULT_NEED_RESET;
9112 }
9113 
9114 /**
9115  * ipr_probe_ioa_part2 - Initializes IOAs found in ipr_probe_ioa(..)
9116  * @ioa_cfg:	ioa cfg struct
9117  *
9118  * Description: This is the second phase of adapter intialization
9119  * This function takes care of initilizing the adapter to the point
9120  * where it can accept new commands.
9121 
9122  * Return value:
9123  * 	0 on success / -EIO on failure
9124  **/
9125 static int ipr_probe_ioa_part2(struct ipr_ioa_cfg *ioa_cfg)
9126 {
9127 	int rc = 0;
9128 	unsigned long host_lock_flags = 0;
9129 
9130 	ENTER;
9131 	spin_lock_irqsave(ioa_cfg->host->host_lock, host_lock_flags);
9132 	dev_dbg(&ioa_cfg->pdev->dev, "ioa_cfg adx: 0x%p\n", ioa_cfg);
9133 	ioa_cfg->probe_done = 1;
9134 	if (ioa_cfg->needs_hard_reset) {
9135 		ioa_cfg->needs_hard_reset = 0;
9136 		ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NONE);
9137 	} else
9138 		_ipr_initiate_ioa_reset(ioa_cfg, ipr_reset_enable_ioa,
9139 					IPR_SHUTDOWN_NONE);
9140 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, host_lock_flags);
9141 
9142 	LEAVE;
9143 	return rc;
9144 }
9145 
9146 /**
9147  * ipr_free_cmd_blks - Frees command blocks allocated for an adapter
9148  * @ioa_cfg:	ioa config struct
9149  *
9150  * Return value:
9151  * 	none
9152  **/
9153 static void ipr_free_cmd_blks(struct ipr_ioa_cfg *ioa_cfg)
9154 {
9155 	int i;
9156 
9157 	if (ioa_cfg->ipr_cmnd_list) {
9158 		for (i = 0; i < IPR_NUM_CMD_BLKS; i++) {
9159 			if (ioa_cfg->ipr_cmnd_list[i])
9160 				dma_pool_free(ioa_cfg->ipr_cmd_pool,
9161 					      ioa_cfg->ipr_cmnd_list[i],
9162 					      ioa_cfg->ipr_cmnd_list_dma[i]);
9163 
9164 			ioa_cfg->ipr_cmnd_list[i] = NULL;
9165 		}
9166 	}
9167 
9168 	if (ioa_cfg->ipr_cmd_pool)
9169 		dma_pool_destroy(ioa_cfg->ipr_cmd_pool);
9170 
9171 	kfree(ioa_cfg->ipr_cmnd_list);
9172 	kfree(ioa_cfg->ipr_cmnd_list_dma);
9173 	ioa_cfg->ipr_cmnd_list = NULL;
9174 	ioa_cfg->ipr_cmnd_list_dma = NULL;
9175 	ioa_cfg->ipr_cmd_pool = NULL;
9176 }
9177 
9178 /**
9179  * ipr_free_mem - Frees memory allocated for an adapter
9180  * @ioa_cfg:	ioa cfg struct
9181  *
9182  * Return value:
9183  * 	nothing
9184  **/
9185 static void ipr_free_mem(struct ipr_ioa_cfg *ioa_cfg)
9186 {
9187 	int i;
9188 
9189 	kfree(ioa_cfg->res_entries);
9190 	dma_free_coherent(&ioa_cfg->pdev->dev, sizeof(struct ipr_misc_cbs),
9191 			  ioa_cfg->vpd_cbs, ioa_cfg->vpd_cbs_dma);
9192 	ipr_free_cmd_blks(ioa_cfg);
9193 
9194 	for (i = 0; i < ioa_cfg->hrrq_num; i++)
9195 		dma_free_coherent(&ioa_cfg->pdev->dev,
9196 				  sizeof(u32) * ioa_cfg->hrrq[i].size,
9197 				  ioa_cfg->hrrq[i].host_rrq,
9198 				  ioa_cfg->hrrq[i].host_rrq_dma);
9199 
9200 	dma_free_coherent(&ioa_cfg->pdev->dev, ioa_cfg->cfg_table_size,
9201 			  ioa_cfg->u.cfg_table, ioa_cfg->cfg_table_dma);
9202 
9203 	for (i = 0; i < IPR_NUM_HCAMS; i++) {
9204 		dma_free_coherent(&ioa_cfg->pdev->dev,
9205 				  sizeof(struct ipr_hostrcb),
9206 				  ioa_cfg->hostrcb[i],
9207 				  ioa_cfg->hostrcb_dma[i]);
9208 	}
9209 
9210 	ipr_free_dump(ioa_cfg);
9211 	kfree(ioa_cfg->trace);
9212 }
9213 
9214 /**
9215  * ipr_free_irqs - Free all allocated IRQs for the adapter.
9216  * @ioa_cfg:	ipr cfg struct
9217  *
9218  * This function frees all allocated IRQs for the
9219  * specified adapter.
9220  *
9221  * Return value:
9222  * 	none
9223  **/
9224 static void ipr_free_irqs(struct ipr_ioa_cfg *ioa_cfg)
9225 {
9226 	struct pci_dev *pdev = ioa_cfg->pdev;
9227 
9228 	if (ioa_cfg->intr_flag == IPR_USE_MSI ||
9229 	    ioa_cfg->intr_flag == IPR_USE_MSIX) {
9230 		int i;
9231 		for (i = 0; i < ioa_cfg->nvectors; i++)
9232 			free_irq(ioa_cfg->vectors_info[i].vec,
9233 				 &ioa_cfg->hrrq[i]);
9234 	} else
9235 		free_irq(pdev->irq, &ioa_cfg->hrrq[0]);
9236 
9237 	if (ioa_cfg->intr_flag == IPR_USE_MSI) {
9238 		pci_disable_msi(pdev);
9239 		ioa_cfg->intr_flag &= ~IPR_USE_MSI;
9240 	} else if (ioa_cfg->intr_flag == IPR_USE_MSIX) {
9241 		pci_disable_msix(pdev);
9242 		ioa_cfg->intr_flag &= ~IPR_USE_MSIX;
9243 	}
9244 }
9245 
9246 /**
9247  * ipr_free_all_resources - Free all allocated resources for an adapter.
9248  * @ipr_cmd:	ipr command struct
9249  *
9250  * This function frees all allocated resources for the
9251  * specified adapter.
9252  *
9253  * Return value:
9254  * 	none
9255  **/
9256 static void ipr_free_all_resources(struct ipr_ioa_cfg *ioa_cfg)
9257 {
9258 	struct pci_dev *pdev = ioa_cfg->pdev;
9259 
9260 	ENTER;
9261 	ipr_free_irqs(ioa_cfg);
9262 	if (ioa_cfg->reset_work_q)
9263 		destroy_workqueue(ioa_cfg->reset_work_q);
9264 	iounmap(ioa_cfg->hdw_dma_regs);
9265 	pci_release_regions(pdev);
9266 	ipr_free_mem(ioa_cfg);
9267 	scsi_host_put(ioa_cfg->host);
9268 	pci_disable_device(pdev);
9269 	LEAVE;
9270 }
9271 
9272 /**
9273  * ipr_alloc_cmd_blks - Allocate command blocks for an adapter
9274  * @ioa_cfg:	ioa config struct
9275  *
9276  * Return value:
9277  * 	0 on success / -ENOMEM on allocation failure
9278  **/
9279 static int ipr_alloc_cmd_blks(struct ipr_ioa_cfg *ioa_cfg)
9280 {
9281 	struct ipr_cmnd *ipr_cmd;
9282 	struct ipr_ioarcb *ioarcb;
9283 	dma_addr_t dma_addr;
9284 	int i, entries_each_hrrq, hrrq_id = 0;
9285 
9286 	ioa_cfg->ipr_cmd_pool = dma_pool_create(IPR_NAME, &ioa_cfg->pdev->dev,
9287 						sizeof(struct ipr_cmnd), 512, 0);
9288 
9289 	if (!ioa_cfg->ipr_cmd_pool)
9290 		return -ENOMEM;
9291 
9292 	ioa_cfg->ipr_cmnd_list = kcalloc(IPR_NUM_CMD_BLKS, sizeof(struct ipr_cmnd *), GFP_KERNEL);
9293 	ioa_cfg->ipr_cmnd_list_dma = kcalloc(IPR_NUM_CMD_BLKS, sizeof(dma_addr_t), GFP_KERNEL);
9294 
9295 	if (!ioa_cfg->ipr_cmnd_list || !ioa_cfg->ipr_cmnd_list_dma) {
9296 		ipr_free_cmd_blks(ioa_cfg);
9297 		return -ENOMEM;
9298 	}
9299 
9300 	for (i = 0; i < ioa_cfg->hrrq_num; i++) {
9301 		if (ioa_cfg->hrrq_num > 1) {
9302 			if (i == 0) {
9303 				entries_each_hrrq = IPR_NUM_INTERNAL_CMD_BLKS;
9304 				ioa_cfg->hrrq[i].min_cmd_id = 0;
9305 					ioa_cfg->hrrq[i].max_cmd_id =
9306 						(entries_each_hrrq - 1);
9307 			} else {
9308 				entries_each_hrrq =
9309 					IPR_NUM_BASE_CMD_BLKS/
9310 					(ioa_cfg->hrrq_num - 1);
9311 				ioa_cfg->hrrq[i].min_cmd_id =
9312 					IPR_NUM_INTERNAL_CMD_BLKS +
9313 					(i - 1) * entries_each_hrrq;
9314 				ioa_cfg->hrrq[i].max_cmd_id =
9315 					(IPR_NUM_INTERNAL_CMD_BLKS +
9316 					i * entries_each_hrrq - 1);
9317 			}
9318 		} else {
9319 			entries_each_hrrq = IPR_NUM_CMD_BLKS;
9320 			ioa_cfg->hrrq[i].min_cmd_id = 0;
9321 			ioa_cfg->hrrq[i].max_cmd_id = (entries_each_hrrq - 1);
9322 		}
9323 		ioa_cfg->hrrq[i].size = entries_each_hrrq;
9324 	}
9325 
9326 	BUG_ON(ioa_cfg->hrrq_num == 0);
9327 
9328 	i = IPR_NUM_CMD_BLKS -
9329 		ioa_cfg->hrrq[ioa_cfg->hrrq_num - 1].max_cmd_id - 1;
9330 	if (i > 0) {
9331 		ioa_cfg->hrrq[ioa_cfg->hrrq_num - 1].size += i;
9332 		ioa_cfg->hrrq[ioa_cfg->hrrq_num - 1].max_cmd_id += i;
9333 	}
9334 
9335 	for (i = 0; i < IPR_NUM_CMD_BLKS; i++) {
9336 		ipr_cmd = dma_pool_alloc(ioa_cfg->ipr_cmd_pool, GFP_KERNEL, &dma_addr);
9337 
9338 		if (!ipr_cmd) {
9339 			ipr_free_cmd_blks(ioa_cfg);
9340 			return -ENOMEM;
9341 		}
9342 
9343 		memset(ipr_cmd, 0, sizeof(*ipr_cmd));
9344 		ioa_cfg->ipr_cmnd_list[i] = ipr_cmd;
9345 		ioa_cfg->ipr_cmnd_list_dma[i] = dma_addr;
9346 
9347 		ioarcb = &ipr_cmd->ioarcb;
9348 		ipr_cmd->dma_addr = dma_addr;
9349 		if (ioa_cfg->sis64)
9350 			ioarcb->a.ioarcb_host_pci_addr64 = cpu_to_be64(dma_addr);
9351 		else
9352 			ioarcb->a.ioarcb_host_pci_addr = cpu_to_be32(dma_addr);
9353 
9354 		ioarcb->host_response_handle = cpu_to_be32(i << 2);
9355 		if (ioa_cfg->sis64) {
9356 			ioarcb->u.sis64_addr_data.data_ioadl_addr =
9357 				cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, i.ioadl64));
9358 			ioarcb->u.sis64_addr_data.ioasa_host_pci_addr =
9359 				cpu_to_be64(dma_addr + offsetof(struct ipr_cmnd, s.ioasa64));
9360 		} else {
9361 			ioarcb->write_ioadl_addr =
9362 				cpu_to_be32(dma_addr + offsetof(struct ipr_cmnd, i.ioadl));
9363 			ioarcb->read_ioadl_addr = ioarcb->write_ioadl_addr;
9364 			ioarcb->ioasa_host_pci_addr =
9365 				cpu_to_be32(dma_addr + offsetof(struct ipr_cmnd, s.ioasa));
9366 		}
9367 		ioarcb->ioasa_len = cpu_to_be16(sizeof(struct ipr_ioasa));
9368 		ipr_cmd->cmd_index = i;
9369 		ipr_cmd->ioa_cfg = ioa_cfg;
9370 		ipr_cmd->sense_buffer_dma = dma_addr +
9371 			offsetof(struct ipr_cmnd, sense_buffer);
9372 
9373 		ipr_cmd->ioarcb.cmd_pkt.hrrq_id = hrrq_id;
9374 		ipr_cmd->hrrq = &ioa_cfg->hrrq[hrrq_id];
9375 		list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
9376 		if (i >= ioa_cfg->hrrq[hrrq_id].max_cmd_id)
9377 			hrrq_id++;
9378 	}
9379 
9380 	return 0;
9381 }
9382 
9383 /**
9384  * ipr_alloc_mem - Allocate memory for an adapter
9385  * @ioa_cfg:	ioa config struct
9386  *
9387  * Return value:
9388  * 	0 on success / non-zero for error
9389  **/
9390 static int ipr_alloc_mem(struct ipr_ioa_cfg *ioa_cfg)
9391 {
9392 	struct pci_dev *pdev = ioa_cfg->pdev;
9393 	int i, rc = -ENOMEM;
9394 
9395 	ENTER;
9396 	ioa_cfg->res_entries = kzalloc(sizeof(struct ipr_resource_entry) *
9397 				       ioa_cfg->max_devs_supported, GFP_KERNEL);
9398 
9399 	if (!ioa_cfg->res_entries)
9400 		goto out;
9401 
9402 	for (i = 0; i < ioa_cfg->max_devs_supported; i++) {
9403 		list_add_tail(&ioa_cfg->res_entries[i].queue, &ioa_cfg->free_res_q);
9404 		ioa_cfg->res_entries[i].ioa_cfg = ioa_cfg;
9405 	}
9406 
9407 	ioa_cfg->vpd_cbs = dma_alloc_coherent(&pdev->dev,
9408 					      sizeof(struct ipr_misc_cbs),
9409 					      &ioa_cfg->vpd_cbs_dma,
9410 					      GFP_KERNEL);
9411 
9412 	if (!ioa_cfg->vpd_cbs)
9413 		goto out_free_res_entries;
9414 
9415 	if (ipr_alloc_cmd_blks(ioa_cfg))
9416 		goto out_free_vpd_cbs;
9417 
9418 	for (i = 0; i < ioa_cfg->hrrq_num; i++) {
9419 		ioa_cfg->hrrq[i].host_rrq = dma_alloc_coherent(&pdev->dev,
9420 					sizeof(u32) * ioa_cfg->hrrq[i].size,
9421 					&ioa_cfg->hrrq[i].host_rrq_dma,
9422 					GFP_KERNEL);
9423 
9424 		if (!ioa_cfg->hrrq[i].host_rrq)  {
9425 			while (--i > 0)
9426 				dma_free_coherent(&pdev->dev,
9427 					sizeof(u32) * ioa_cfg->hrrq[i].size,
9428 					ioa_cfg->hrrq[i].host_rrq,
9429 					ioa_cfg->hrrq[i].host_rrq_dma);
9430 			goto out_ipr_free_cmd_blocks;
9431 		}
9432 		ioa_cfg->hrrq[i].ioa_cfg = ioa_cfg;
9433 	}
9434 
9435 	ioa_cfg->u.cfg_table = dma_alloc_coherent(&pdev->dev,
9436 						  ioa_cfg->cfg_table_size,
9437 						  &ioa_cfg->cfg_table_dma,
9438 						  GFP_KERNEL);
9439 
9440 	if (!ioa_cfg->u.cfg_table)
9441 		goto out_free_host_rrq;
9442 
9443 	for (i = 0; i < IPR_NUM_HCAMS; i++) {
9444 		ioa_cfg->hostrcb[i] = dma_alloc_coherent(&pdev->dev,
9445 							 sizeof(struct ipr_hostrcb),
9446 							 &ioa_cfg->hostrcb_dma[i],
9447 							 GFP_KERNEL);
9448 
9449 		if (!ioa_cfg->hostrcb[i])
9450 			goto out_free_hostrcb_dma;
9451 
9452 		ioa_cfg->hostrcb[i]->hostrcb_dma =
9453 			ioa_cfg->hostrcb_dma[i] + offsetof(struct ipr_hostrcb, hcam);
9454 		ioa_cfg->hostrcb[i]->ioa_cfg = ioa_cfg;
9455 		list_add_tail(&ioa_cfg->hostrcb[i]->queue, &ioa_cfg->hostrcb_free_q);
9456 	}
9457 
9458 	ioa_cfg->trace = kzalloc(sizeof(struct ipr_trace_entry) *
9459 				 IPR_NUM_TRACE_ENTRIES, GFP_KERNEL);
9460 
9461 	if (!ioa_cfg->trace)
9462 		goto out_free_hostrcb_dma;
9463 
9464 	rc = 0;
9465 out:
9466 	LEAVE;
9467 	return rc;
9468 
9469 out_free_hostrcb_dma:
9470 	while (i-- > 0) {
9471 		dma_free_coherent(&pdev->dev, sizeof(struct ipr_hostrcb),
9472 				  ioa_cfg->hostrcb[i],
9473 				  ioa_cfg->hostrcb_dma[i]);
9474 	}
9475 	dma_free_coherent(&pdev->dev, ioa_cfg->cfg_table_size,
9476 			  ioa_cfg->u.cfg_table, ioa_cfg->cfg_table_dma);
9477 out_free_host_rrq:
9478 	for (i = 0; i < ioa_cfg->hrrq_num; i++) {
9479 		dma_free_coherent(&pdev->dev,
9480 				  sizeof(u32) * ioa_cfg->hrrq[i].size,
9481 				  ioa_cfg->hrrq[i].host_rrq,
9482 				  ioa_cfg->hrrq[i].host_rrq_dma);
9483 	}
9484 out_ipr_free_cmd_blocks:
9485 	ipr_free_cmd_blks(ioa_cfg);
9486 out_free_vpd_cbs:
9487 	dma_free_coherent(&pdev->dev, sizeof(struct ipr_misc_cbs),
9488 			  ioa_cfg->vpd_cbs, ioa_cfg->vpd_cbs_dma);
9489 out_free_res_entries:
9490 	kfree(ioa_cfg->res_entries);
9491 	goto out;
9492 }
9493 
9494 /**
9495  * ipr_initialize_bus_attr - Initialize SCSI bus attributes to default values
9496  * @ioa_cfg:	ioa config struct
9497  *
9498  * Return value:
9499  * 	none
9500  **/
9501 static void ipr_initialize_bus_attr(struct ipr_ioa_cfg *ioa_cfg)
9502 {
9503 	int i;
9504 
9505 	for (i = 0; i < IPR_MAX_NUM_BUSES; i++) {
9506 		ioa_cfg->bus_attr[i].bus = i;
9507 		ioa_cfg->bus_attr[i].qas_enabled = 0;
9508 		ioa_cfg->bus_attr[i].bus_width = IPR_DEFAULT_BUS_WIDTH;
9509 		if (ipr_max_speed < ARRAY_SIZE(ipr_max_bus_speeds))
9510 			ioa_cfg->bus_attr[i].max_xfer_rate = ipr_max_bus_speeds[ipr_max_speed];
9511 		else
9512 			ioa_cfg->bus_attr[i].max_xfer_rate = IPR_U160_SCSI_RATE;
9513 	}
9514 }
9515 
9516 /**
9517  * ipr_init_regs - Initialize IOA registers
9518  * @ioa_cfg:	ioa config struct
9519  *
9520  * Return value:
9521  *	none
9522  **/
9523 static void ipr_init_regs(struct ipr_ioa_cfg *ioa_cfg)
9524 {
9525 	const struct ipr_interrupt_offsets *p;
9526 	struct ipr_interrupts *t;
9527 	void __iomem *base;
9528 
9529 	p = &ioa_cfg->chip_cfg->regs;
9530 	t = &ioa_cfg->regs;
9531 	base = ioa_cfg->hdw_dma_regs;
9532 
9533 	t->set_interrupt_mask_reg = base + p->set_interrupt_mask_reg;
9534 	t->clr_interrupt_mask_reg = base + p->clr_interrupt_mask_reg;
9535 	t->clr_interrupt_mask_reg32 = base + p->clr_interrupt_mask_reg32;
9536 	t->sense_interrupt_mask_reg = base + p->sense_interrupt_mask_reg;
9537 	t->sense_interrupt_mask_reg32 = base + p->sense_interrupt_mask_reg32;
9538 	t->clr_interrupt_reg = base + p->clr_interrupt_reg;
9539 	t->clr_interrupt_reg32 = base + p->clr_interrupt_reg32;
9540 	t->sense_interrupt_reg = base + p->sense_interrupt_reg;
9541 	t->sense_interrupt_reg32 = base + p->sense_interrupt_reg32;
9542 	t->ioarrin_reg = base + p->ioarrin_reg;
9543 	t->sense_uproc_interrupt_reg = base + p->sense_uproc_interrupt_reg;
9544 	t->sense_uproc_interrupt_reg32 = base + p->sense_uproc_interrupt_reg32;
9545 	t->set_uproc_interrupt_reg = base + p->set_uproc_interrupt_reg;
9546 	t->set_uproc_interrupt_reg32 = base + p->set_uproc_interrupt_reg32;
9547 	t->clr_uproc_interrupt_reg = base + p->clr_uproc_interrupt_reg;
9548 	t->clr_uproc_interrupt_reg32 = base + p->clr_uproc_interrupt_reg32;
9549 
9550 	if (ioa_cfg->sis64) {
9551 		t->init_feedback_reg = base + p->init_feedback_reg;
9552 		t->dump_addr_reg = base + p->dump_addr_reg;
9553 		t->dump_data_reg = base + p->dump_data_reg;
9554 		t->endian_swap_reg = base + p->endian_swap_reg;
9555 	}
9556 }
9557 
9558 /**
9559  * ipr_init_ioa_cfg - Initialize IOA config struct
9560  * @ioa_cfg:	ioa config struct
9561  * @host:		scsi host struct
9562  * @pdev:		PCI dev struct
9563  *
9564  * Return value:
9565  * 	none
9566  **/
9567 static void ipr_init_ioa_cfg(struct ipr_ioa_cfg *ioa_cfg,
9568 			     struct Scsi_Host *host, struct pci_dev *pdev)
9569 {
9570 	int i;
9571 
9572 	ioa_cfg->host = host;
9573 	ioa_cfg->pdev = pdev;
9574 	ioa_cfg->log_level = ipr_log_level;
9575 	ioa_cfg->doorbell = IPR_DOORBELL;
9576 	sprintf(ioa_cfg->eye_catcher, IPR_EYECATCHER);
9577 	sprintf(ioa_cfg->trace_start, IPR_TRACE_START_LABEL);
9578 	sprintf(ioa_cfg->cfg_table_start, IPR_CFG_TBL_START);
9579 	sprintf(ioa_cfg->resource_table_label, IPR_RES_TABLE_LABEL);
9580 	sprintf(ioa_cfg->ipr_hcam_label, IPR_HCAM_LABEL);
9581 	sprintf(ioa_cfg->ipr_cmd_label, IPR_CMD_LABEL);
9582 
9583 	INIT_LIST_HEAD(&ioa_cfg->hostrcb_free_q);
9584 	INIT_LIST_HEAD(&ioa_cfg->hostrcb_pending_q);
9585 	INIT_LIST_HEAD(&ioa_cfg->free_res_q);
9586 	INIT_LIST_HEAD(&ioa_cfg->used_res_q);
9587 	INIT_WORK(&ioa_cfg->work_q, ipr_worker_thread);
9588 	init_waitqueue_head(&ioa_cfg->reset_wait_q);
9589 	init_waitqueue_head(&ioa_cfg->msi_wait_q);
9590 	init_waitqueue_head(&ioa_cfg->eeh_wait_q);
9591 	ioa_cfg->sdt_state = INACTIVE;
9592 
9593 	ipr_initialize_bus_attr(ioa_cfg);
9594 	ioa_cfg->max_devs_supported = ipr_max_devs;
9595 
9596 	if (ioa_cfg->sis64) {
9597 		host->max_id = IPR_MAX_SIS64_TARGETS_PER_BUS;
9598 		host->max_lun = IPR_MAX_SIS64_LUNS_PER_TARGET;
9599 		if (ipr_max_devs > IPR_MAX_SIS64_DEVS)
9600 			ioa_cfg->max_devs_supported = IPR_MAX_SIS64_DEVS;
9601 		ioa_cfg->cfg_table_size = (sizeof(struct ipr_config_table_hdr64)
9602 					   + ((sizeof(struct ipr_config_table_entry64)
9603 					       * ioa_cfg->max_devs_supported)));
9604 	} else {
9605 		host->max_id = IPR_MAX_NUM_TARGETS_PER_BUS;
9606 		host->max_lun = IPR_MAX_NUM_LUNS_PER_TARGET;
9607 		if (ipr_max_devs > IPR_MAX_PHYSICAL_DEVS)
9608 			ioa_cfg->max_devs_supported = IPR_MAX_PHYSICAL_DEVS;
9609 		ioa_cfg->cfg_table_size = (sizeof(struct ipr_config_table_hdr)
9610 					   + ((sizeof(struct ipr_config_table_entry)
9611 					       * ioa_cfg->max_devs_supported)));
9612 	}
9613 
9614 	host->max_channel = IPR_VSET_BUS;
9615 	host->unique_id = host->host_no;
9616 	host->max_cmd_len = IPR_MAX_CDB_LEN;
9617 	host->can_queue = ioa_cfg->max_cmds;
9618 	pci_set_drvdata(pdev, ioa_cfg);
9619 
9620 	for (i = 0; i < ARRAY_SIZE(ioa_cfg->hrrq); i++) {
9621 		INIT_LIST_HEAD(&ioa_cfg->hrrq[i].hrrq_free_q);
9622 		INIT_LIST_HEAD(&ioa_cfg->hrrq[i].hrrq_pending_q);
9623 		spin_lock_init(&ioa_cfg->hrrq[i]._lock);
9624 		if (i == 0)
9625 			ioa_cfg->hrrq[i].lock = ioa_cfg->host->host_lock;
9626 		else
9627 			ioa_cfg->hrrq[i].lock = &ioa_cfg->hrrq[i]._lock;
9628 	}
9629 }
9630 
9631 /**
9632  * ipr_get_chip_info - Find adapter chip information
9633  * @dev_id:		PCI device id struct
9634  *
9635  * Return value:
9636  * 	ptr to chip information on success / NULL on failure
9637  **/
9638 static const struct ipr_chip_t *
9639 ipr_get_chip_info(const struct pci_device_id *dev_id)
9640 {
9641 	int i;
9642 
9643 	for (i = 0; i < ARRAY_SIZE(ipr_chip); i++)
9644 		if (ipr_chip[i].vendor == dev_id->vendor &&
9645 		    ipr_chip[i].device == dev_id->device)
9646 			return &ipr_chip[i];
9647 	return NULL;
9648 }
9649 
9650 /**
9651  * ipr_wait_for_pci_err_recovery - Wait for any PCI error recovery to complete
9652  *						during probe time
9653  * @ioa_cfg:	ioa config struct
9654  *
9655  * Return value:
9656  * 	None
9657  **/
9658 static void ipr_wait_for_pci_err_recovery(struct ipr_ioa_cfg *ioa_cfg)
9659 {
9660 	struct pci_dev *pdev = ioa_cfg->pdev;
9661 
9662 	if (pci_channel_offline(pdev)) {
9663 		wait_event_timeout(ioa_cfg->eeh_wait_q,
9664 				   !pci_channel_offline(pdev),
9665 				   IPR_PCI_ERROR_RECOVERY_TIMEOUT);
9666 		pci_restore_state(pdev);
9667 	}
9668 }
9669 
9670 static int ipr_enable_msix(struct ipr_ioa_cfg *ioa_cfg)
9671 {
9672 	struct msix_entry entries[IPR_MAX_MSIX_VECTORS];
9673 	int i, vectors;
9674 
9675 	for (i = 0; i < ARRAY_SIZE(entries); ++i)
9676 		entries[i].entry = i;
9677 
9678 	vectors = pci_enable_msix_range(ioa_cfg->pdev,
9679 					entries, 1, ipr_number_of_msix);
9680 	if (vectors < 0) {
9681 		ipr_wait_for_pci_err_recovery(ioa_cfg);
9682 		return vectors;
9683 	}
9684 
9685 	for (i = 0; i < vectors; i++)
9686 		ioa_cfg->vectors_info[i].vec = entries[i].vector;
9687 	ioa_cfg->nvectors = vectors;
9688 
9689 	return 0;
9690 }
9691 
9692 static int ipr_enable_msi(struct ipr_ioa_cfg *ioa_cfg)
9693 {
9694 	int i, vectors;
9695 
9696 	vectors = pci_enable_msi_range(ioa_cfg->pdev, 1, ipr_number_of_msix);
9697 	if (vectors < 0) {
9698 		ipr_wait_for_pci_err_recovery(ioa_cfg);
9699 		return vectors;
9700 	}
9701 
9702 	for (i = 0; i < vectors; i++)
9703 		ioa_cfg->vectors_info[i].vec = ioa_cfg->pdev->irq + i;
9704 	ioa_cfg->nvectors = vectors;
9705 
9706 	return 0;
9707 }
9708 
9709 static void name_msi_vectors(struct ipr_ioa_cfg *ioa_cfg)
9710 {
9711 	int vec_idx, n = sizeof(ioa_cfg->vectors_info[0].desc) - 1;
9712 
9713 	for (vec_idx = 0; vec_idx < ioa_cfg->nvectors; vec_idx++) {
9714 		snprintf(ioa_cfg->vectors_info[vec_idx].desc, n,
9715 			 "host%d-%d", ioa_cfg->host->host_no, vec_idx);
9716 		ioa_cfg->vectors_info[vec_idx].
9717 			desc[strlen(ioa_cfg->vectors_info[vec_idx].desc)] = 0;
9718 	}
9719 }
9720 
9721 static int ipr_request_other_msi_irqs(struct ipr_ioa_cfg *ioa_cfg)
9722 {
9723 	int i, rc;
9724 
9725 	for (i = 1; i < ioa_cfg->nvectors; i++) {
9726 		rc = request_irq(ioa_cfg->vectors_info[i].vec,
9727 			ipr_isr_mhrrq,
9728 			0,
9729 			ioa_cfg->vectors_info[i].desc,
9730 			&ioa_cfg->hrrq[i]);
9731 		if (rc) {
9732 			while (--i >= 0)
9733 				free_irq(ioa_cfg->vectors_info[i].vec,
9734 					&ioa_cfg->hrrq[i]);
9735 			return rc;
9736 		}
9737 	}
9738 	return 0;
9739 }
9740 
9741 /**
9742  * ipr_test_intr - Handle the interrupt generated in ipr_test_msi().
9743  * @pdev:		PCI device struct
9744  *
9745  * Description: Simply set the msi_received flag to 1 indicating that
9746  * Message Signaled Interrupts are supported.
9747  *
9748  * Return value:
9749  * 	0 on success / non-zero on failure
9750  **/
9751 static irqreturn_t ipr_test_intr(int irq, void *devp)
9752 {
9753 	struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)devp;
9754 	unsigned long lock_flags = 0;
9755 	irqreturn_t rc = IRQ_HANDLED;
9756 
9757 	dev_info(&ioa_cfg->pdev->dev, "Received IRQ : %d\n", irq);
9758 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
9759 
9760 	ioa_cfg->msi_received = 1;
9761 	wake_up(&ioa_cfg->msi_wait_q);
9762 
9763 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
9764 	return rc;
9765 }
9766 
9767 /**
9768  * ipr_test_msi - Test for Message Signaled Interrupt (MSI) support.
9769  * @pdev:		PCI device struct
9770  *
9771  * Description: The return value from pci_enable_msi_range() can not always be
9772  * trusted.  This routine sets up and initiates a test interrupt to determine
9773  * if the interrupt is received via the ipr_test_intr() service routine.
9774  * If the tests fails, the driver will fall back to LSI.
9775  *
9776  * Return value:
9777  * 	0 on success / non-zero on failure
9778  **/
9779 static int ipr_test_msi(struct ipr_ioa_cfg *ioa_cfg, struct pci_dev *pdev)
9780 {
9781 	int rc;
9782 	volatile u32 int_reg;
9783 	unsigned long lock_flags = 0;
9784 
9785 	ENTER;
9786 
9787 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
9788 	init_waitqueue_head(&ioa_cfg->msi_wait_q);
9789 	ioa_cfg->msi_received = 0;
9790 	ipr_mask_and_clear_interrupts(ioa_cfg, ~IPR_PCII_IOA_TRANS_TO_OPER);
9791 	writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE, ioa_cfg->regs.clr_interrupt_mask_reg32);
9792 	int_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
9793 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
9794 
9795 	if (ioa_cfg->intr_flag == IPR_USE_MSIX)
9796 		rc = request_irq(ioa_cfg->vectors_info[0].vec, ipr_test_intr, 0, IPR_NAME, ioa_cfg);
9797 	else
9798 		rc = request_irq(pdev->irq, ipr_test_intr, 0, IPR_NAME, ioa_cfg);
9799 	if (rc) {
9800 		dev_err(&pdev->dev, "Can not assign irq %d\n", pdev->irq);
9801 		return rc;
9802 	} else if (ipr_debug)
9803 		dev_info(&pdev->dev, "IRQ assigned: %d\n", pdev->irq);
9804 
9805 	writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE, ioa_cfg->regs.sense_interrupt_reg32);
9806 	int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
9807 	wait_event_timeout(ioa_cfg->msi_wait_q, ioa_cfg->msi_received, HZ);
9808 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
9809 	ipr_mask_and_clear_interrupts(ioa_cfg, ~IPR_PCII_IOA_TRANS_TO_OPER);
9810 
9811 	if (!ioa_cfg->msi_received) {
9812 		/* MSI test failed */
9813 		dev_info(&pdev->dev, "MSI test failed.  Falling back to LSI.\n");
9814 		rc = -EOPNOTSUPP;
9815 	} else if (ipr_debug)
9816 		dev_info(&pdev->dev, "MSI test succeeded.\n");
9817 
9818 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
9819 
9820 	if (ioa_cfg->intr_flag == IPR_USE_MSIX)
9821 		free_irq(ioa_cfg->vectors_info[0].vec, ioa_cfg);
9822 	else
9823 		free_irq(pdev->irq, ioa_cfg);
9824 
9825 	LEAVE;
9826 
9827 	return rc;
9828 }
9829 
9830  /* ipr_probe_ioa - Allocates memory and does first stage of initialization
9831  * @pdev:		PCI device struct
9832  * @dev_id:		PCI device id struct
9833  *
9834  * Return value:
9835  * 	0 on success / non-zero on failure
9836  **/
9837 static int ipr_probe_ioa(struct pci_dev *pdev,
9838 			 const struct pci_device_id *dev_id)
9839 {
9840 	struct ipr_ioa_cfg *ioa_cfg;
9841 	struct Scsi_Host *host;
9842 	unsigned long ipr_regs_pci;
9843 	void __iomem *ipr_regs;
9844 	int rc = PCIBIOS_SUCCESSFUL;
9845 	volatile u32 mask, uproc, interrupts;
9846 	unsigned long lock_flags, driver_lock_flags;
9847 
9848 	ENTER;
9849 
9850 	dev_info(&pdev->dev, "Found IOA with IRQ: %d\n", pdev->irq);
9851 	host = scsi_host_alloc(&driver_template, sizeof(*ioa_cfg));
9852 
9853 	if (!host) {
9854 		dev_err(&pdev->dev, "call to scsi_host_alloc failed!\n");
9855 		rc = -ENOMEM;
9856 		goto out;
9857 	}
9858 
9859 	ioa_cfg = (struct ipr_ioa_cfg *)host->hostdata;
9860 	memset(ioa_cfg, 0, sizeof(struct ipr_ioa_cfg));
9861 	ata_host_init(&ioa_cfg->ata_host, &pdev->dev, &ipr_sata_ops);
9862 
9863 	ioa_cfg->ipr_chip = ipr_get_chip_info(dev_id);
9864 
9865 	if (!ioa_cfg->ipr_chip) {
9866 		dev_err(&pdev->dev, "Unknown adapter chipset 0x%04X 0x%04X\n",
9867 			dev_id->vendor, dev_id->device);
9868 		goto out_scsi_host_put;
9869 	}
9870 
9871 	/* set SIS 32 or SIS 64 */
9872 	ioa_cfg->sis64 = ioa_cfg->ipr_chip->sis_type == IPR_SIS64 ? 1 : 0;
9873 	ioa_cfg->chip_cfg = ioa_cfg->ipr_chip->cfg;
9874 	ioa_cfg->clear_isr = ioa_cfg->chip_cfg->clear_isr;
9875 	ioa_cfg->max_cmds = ioa_cfg->chip_cfg->max_cmds;
9876 
9877 	if (ipr_transop_timeout)
9878 		ioa_cfg->transop_timeout = ipr_transop_timeout;
9879 	else if (dev_id->driver_data & IPR_USE_LONG_TRANSOP_TIMEOUT)
9880 		ioa_cfg->transop_timeout = IPR_LONG_OPERATIONAL_TIMEOUT;
9881 	else
9882 		ioa_cfg->transop_timeout = IPR_OPERATIONAL_TIMEOUT;
9883 
9884 	ioa_cfg->revid = pdev->revision;
9885 
9886 	ipr_init_ioa_cfg(ioa_cfg, host, pdev);
9887 
9888 	ipr_regs_pci = pci_resource_start(pdev, 0);
9889 
9890 	rc = pci_request_regions(pdev, IPR_NAME);
9891 	if (rc < 0) {
9892 		dev_err(&pdev->dev,
9893 			"Couldn't register memory range of registers\n");
9894 		goto out_scsi_host_put;
9895 	}
9896 
9897 	rc = pci_enable_device(pdev);
9898 
9899 	if (rc || pci_channel_offline(pdev)) {
9900 		if (pci_channel_offline(pdev)) {
9901 			ipr_wait_for_pci_err_recovery(ioa_cfg);
9902 			rc = pci_enable_device(pdev);
9903 		}
9904 
9905 		if (rc) {
9906 			dev_err(&pdev->dev, "Cannot enable adapter\n");
9907 			ipr_wait_for_pci_err_recovery(ioa_cfg);
9908 			goto out_release_regions;
9909 		}
9910 	}
9911 
9912 	ipr_regs = pci_ioremap_bar(pdev, 0);
9913 
9914 	if (!ipr_regs) {
9915 		dev_err(&pdev->dev,
9916 			"Couldn't map memory range of registers\n");
9917 		rc = -ENOMEM;
9918 		goto out_disable;
9919 	}
9920 
9921 	ioa_cfg->hdw_dma_regs = ipr_regs;
9922 	ioa_cfg->hdw_dma_regs_pci = ipr_regs_pci;
9923 	ioa_cfg->ioa_mailbox = ioa_cfg->chip_cfg->mailbox + ipr_regs;
9924 
9925 	ipr_init_regs(ioa_cfg);
9926 
9927 	if (ioa_cfg->sis64) {
9928 		rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
9929 		if (rc < 0) {
9930 			dev_dbg(&pdev->dev, "Failed to set 64 bit DMA mask\n");
9931 			rc = dma_set_mask_and_coherent(&pdev->dev,
9932 						       DMA_BIT_MASK(32));
9933 		}
9934 	} else
9935 		rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
9936 
9937 	if (rc < 0) {
9938 		dev_err(&pdev->dev, "Failed to set DMA mask\n");
9939 		goto cleanup_nomem;
9940 	}
9941 
9942 	rc = pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE,
9943 				   ioa_cfg->chip_cfg->cache_line_size);
9944 
9945 	if (rc != PCIBIOS_SUCCESSFUL) {
9946 		dev_err(&pdev->dev, "Write of cache line size failed\n");
9947 		ipr_wait_for_pci_err_recovery(ioa_cfg);
9948 		rc = -EIO;
9949 		goto cleanup_nomem;
9950 	}
9951 
9952 	/* Issue MMIO read to ensure card is not in EEH */
9953 	interrupts = readl(ioa_cfg->regs.sense_interrupt_reg);
9954 	ipr_wait_for_pci_err_recovery(ioa_cfg);
9955 
9956 	if (ipr_number_of_msix > IPR_MAX_MSIX_VECTORS) {
9957 		dev_err(&pdev->dev, "The max number of MSIX is %d\n",
9958 			IPR_MAX_MSIX_VECTORS);
9959 		ipr_number_of_msix = IPR_MAX_MSIX_VECTORS;
9960 	}
9961 
9962 	if (ioa_cfg->ipr_chip->intr_type == IPR_USE_MSI &&
9963 			ipr_enable_msix(ioa_cfg) == 0)
9964 		ioa_cfg->intr_flag = IPR_USE_MSIX;
9965 	else if (ioa_cfg->ipr_chip->intr_type == IPR_USE_MSI &&
9966 			ipr_enable_msi(ioa_cfg) == 0)
9967 		ioa_cfg->intr_flag = IPR_USE_MSI;
9968 	else {
9969 		ioa_cfg->intr_flag = IPR_USE_LSI;
9970 		ioa_cfg->nvectors = 1;
9971 		dev_info(&pdev->dev, "Cannot enable MSI.\n");
9972 	}
9973 
9974 	pci_set_master(pdev);
9975 
9976 	if (pci_channel_offline(pdev)) {
9977 		ipr_wait_for_pci_err_recovery(ioa_cfg);
9978 		pci_set_master(pdev);
9979 		if (pci_channel_offline(pdev)) {
9980 			rc = -EIO;
9981 			goto out_msi_disable;
9982 		}
9983 	}
9984 
9985 	if (ioa_cfg->intr_flag == IPR_USE_MSI ||
9986 	    ioa_cfg->intr_flag == IPR_USE_MSIX) {
9987 		rc = ipr_test_msi(ioa_cfg, pdev);
9988 		if (rc == -EOPNOTSUPP) {
9989 			ipr_wait_for_pci_err_recovery(ioa_cfg);
9990 			if (ioa_cfg->intr_flag == IPR_USE_MSI) {
9991 				ioa_cfg->intr_flag &= ~IPR_USE_MSI;
9992 				pci_disable_msi(pdev);
9993 			 } else if (ioa_cfg->intr_flag == IPR_USE_MSIX) {
9994 				ioa_cfg->intr_flag &= ~IPR_USE_MSIX;
9995 				pci_disable_msix(pdev);
9996 			}
9997 
9998 			ioa_cfg->intr_flag = IPR_USE_LSI;
9999 			ioa_cfg->nvectors = 1;
10000 		}
10001 		else if (rc)
10002 			goto out_msi_disable;
10003 		else {
10004 			if (ioa_cfg->intr_flag == IPR_USE_MSI)
10005 				dev_info(&pdev->dev,
10006 					"Request for %d MSIs succeeded with starting IRQ: %d\n",
10007 					ioa_cfg->nvectors, pdev->irq);
10008 			else if (ioa_cfg->intr_flag == IPR_USE_MSIX)
10009 				dev_info(&pdev->dev,
10010 					"Request for %d MSIXs succeeded.",
10011 					ioa_cfg->nvectors);
10012 		}
10013 	}
10014 
10015 	ioa_cfg->hrrq_num = min3(ioa_cfg->nvectors,
10016 				(unsigned int)num_online_cpus(),
10017 				(unsigned int)IPR_MAX_HRRQ_NUM);
10018 
10019 	if ((rc = ipr_save_pcix_cmd_reg(ioa_cfg)))
10020 		goto out_msi_disable;
10021 
10022 	if ((rc = ipr_set_pcix_cmd_reg(ioa_cfg)))
10023 		goto out_msi_disable;
10024 
10025 	rc = ipr_alloc_mem(ioa_cfg);
10026 	if (rc < 0) {
10027 		dev_err(&pdev->dev,
10028 			"Couldn't allocate enough memory for device driver!\n");
10029 		goto out_msi_disable;
10030 	}
10031 
10032 	/* Save away PCI config space for use following IOA reset */
10033 	rc = pci_save_state(pdev);
10034 
10035 	if (rc != PCIBIOS_SUCCESSFUL) {
10036 		dev_err(&pdev->dev, "Failed to save PCI config space\n");
10037 		rc = -EIO;
10038 		goto cleanup_nolog;
10039 	}
10040 
10041 	/*
10042 	 * If HRRQ updated interrupt is not masked, or reset alert is set,
10043 	 * the card is in an unknown state and needs a hard reset
10044 	 */
10045 	mask = readl(ioa_cfg->regs.sense_interrupt_mask_reg32);
10046 	interrupts = readl(ioa_cfg->regs.sense_interrupt_reg32);
10047 	uproc = readl(ioa_cfg->regs.sense_uproc_interrupt_reg32);
10048 	if ((mask & IPR_PCII_HRRQ_UPDATED) == 0 || (uproc & IPR_UPROCI_RESET_ALERT))
10049 		ioa_cfg->needs_hard_reset = 1;
10050 	if ((interrupts & IPR_PCII_ERROR_INTERRUPTS) || reset_devices)
10051 		ioa_cfg->needs_hard_reset = 1;
10052 	if (interrupts & IPR_PCII_IOA_UNIT_CHECKED)
10053 		ioa_cfg->ioa_unit_checked = 1;
10054 
10055 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
10056 	ipr_mask_and_clear_interrupts(ioa_cfg, ~IPR_PCII_IOA_TRANS_TO_OPER);
10057 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
10058 
10059 	if (ioa_cfg->intr_flag == IPR_USE_MSI
10060 			|| ioa_cfg->intr_flag == IPR_USE_MSIX) {
10061 		name_msi_vectors(ioa_cfg);
10062 		rc = request_irq(ioa_cfg->vectors_info[0].vec, ipr_isr,
10063 			0,
10064 			ioa_cfg->vectors_info[0].desc,
10065 			&ioa_cfg->hrrq[0]);
10066 		if (!rc)
10067 			rc = ipr_request_other_msi_irqs(ioa_cfg);
10068 	} else {
10069 		rc = request_irq(pdev->irq, ipr_isr,
10070 			 IRQF_SHARED,
10071 			 IPR_NAME, &ioa_cfg->hrrq[0]);
10072 	}
10073 	if (rc) {
10074 		dev_err(&pdev->dev, "Couldn't register IRQ %d! rc=%d\n",
10075 			pdev->irq, rc);
10076 		goto cleanup_nolog;
10077 	}
10078 
10079 	if ((dev_id->driver_data & IPR_USE_PCI_WARM_RESET) ||
10080 	    (dev_id->device == PCI_DEVICE_ID_IBM_OBSIDIAN_E && !ioa_cfg->revid)) {
10081 		ioa_cfg->needs_warm_reset = 1;
10082 		ioa_cfg->reset = ipr_reset_slot_reset;
10083 
10084 		ioa_cfg->reset_work_q = alloc_ordered_workqueue("ipr_reset_%d",
10085 								WQ_MEM_RECLAIM, host->host_no);
10086 
10087 		if (!ioa_cfg->reset_work_q) {
10088 			dev_err(&pdev->dev, "Couldn't register reset workqueue\n");
10089 			goto out_free_irq;
10090 		}
10091 	} else
10092 		ioa_cfg->reset = ipr_reset_start_bist;
10093 
10094 	spin_lock_irqsave(&ipr_driver_lock, driver_lock_flags);
10095 	list_add_tail(&ioa_cfg->queue, &ipr_ioa_head);
10096 	spin_unlock_irqrestore(&ipr_driver_lock, driver_lock_flags);
10097 
10098 	LEAVE;
10099 out:
10100 	return rc;
10101 
10102 out_free_irq:
10103 	ipr_free_irqs(ioa_cfg);
10104 cleanup_nolog:
10105 	ipr_free_mem(ioa_cfg);
10106 out_msi_disable:
10107 	ipr_wait_for_pci_err_recovery(ioa_cfg);
10108 	if (ioa_cfg->intr_flag == IPR_USE_MSI)
10109 		pci_disable_msi(pdev);
10110 	else if (ioa_cfg->intr_flag == IPR_USE_MSIX)
10111 		pci_disable_msix(pdev);
10112 cleanup_nomem:
10113 	iounmap(ipr_regs);
10114 out_disable:
10115 	pci_disable_device(pdev);
10116 out_release_regions:
10117 	pci_release_regions(pdev);
10118 out_scsi_host_put:
10119 	scsi_host_put(host);
10120 	goto out;
10121 }
10122 
10123 /**
10124  * ipr_initiate_ioa_bringdown - Bring down an adapter
10125  * @ioa_cfg:		ioa config struct
10126  * @shutdown_type:	shutdown type
10127  *
10128  * Description: This function will initiate bringing down the adapter.
10129  * This consists of issuing an IOA shutdown to the adapter
10130  * to flush the cache, and running BIST.
10131  * If the caller needs to wait on the completion of the reset,
10132  * the caller must sleep on the reset_wait_q.
10133  *
10134  * Return value:
10135  * 	none
10136  **/
10137 static void ipr_initiate_ioa_bringdown(struct ipr_ioa_cfg *ioa_cfg,
10138 				       enum ipr_shutdown_type shutdown_type)
10139 {
10140 	ENTER;
10141 	if (ioa_cfg->sdt_state == WAIT_FOR_DUMP)
10142 		ioa_cfg->sdt_state = ABORT_DUMP;
10143 	ioa_cfg->reset_retries = 0;
10144 	ioa_cfg->in_ioa_bringdown = 1;
10145 	ipr_initiate_ioa_reset(ioa_cfg, shutdown_type);
10146 	LEAVE;
10147 }
10148 
10149 /**
10150  * __ipr_remove - Remove a single adapter
10151  * @pdev:	pci device struct
10152  *
10153  * Adapter hot plug remove entry point.
10154  *
10155  * Return value:
10156  * 	none
10157  **/
10158 static void __ipr_remove(struct pci_dev *pdev)
10159 {
10160 	unsigned long host_lock_flags = 0;
10161 	struct ipr_ioa_cfg *ioa_cfg = pci_get_drvdata(pdev);
10162 	int i;
10163 	unsigned long driver_lock_flags;
10164 	ENTER;
10165 
10166 	spin_lock_irqsave(ioa_cfg->host->host_lock, host_lock_flags);
10167 	while (ioa_cfg->in_reset_reload) {
10168 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, host_lock_flags);
10169 		wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
10170 		spin_lock_irqsave(ioa_cfg->host->host_lock, host_lock_flags);
10171 	}
10172 
10173 	for (i = 0; i < ioa_cfg->hrrq_num; i++) {
10174 		spin_lock(&ioa_cfg->hrrq[i]._lock);
10175 		ioa_cfg->hrrq[i].removing_ioa = 1;
10176 		spin_unlock(&ioa_cfg->hrrq[i]._lock);
10177 	}
10178 	wmb();
10179 	ipr_initiate_ioa_bringdown(ioa_cfg, IPR_SHUTDOWN_NORMAL);
10180 
10181 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, host_lock_flags);
10182 	wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
10183 	flush_work(&ioa_cfg->work_q);
10184 	if (ioa_cfg->reset_work_q)
10185 		flush_workqueue(ioa_cfg->reset_work_q);
10186 	INIT_LIST_HEAD(&ioa_cfg->used_res_q);
10187 	spin_lock_irqsave(ioa_cfg->host->host_lock, host_lock_flags);
10188 
10189 	spin_lock_irqsave(&ipr_driver_lock, driver_lock_flags);
10190 	list_del(&ioa_cfg->queue);
10191 	spin_unlock_irqrestore(&ipr_driver_lock, driver_lock_flags);
10192 
10193 	if (ioa_cfg->sdt_state == ABORT_DUMP)
10194 		ioa_cfg->sdt_state = WAIT_FOR_DUMP;
10195 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, host_lock_flags);
10196 
10197 	ipr_free_all_resources(ioa_cfg);
10198 
10199 	LEAVE;
10200 }
10201 
10202 /**
10203  * ipr_remove - IOA hot plug remove entry point
10204  * @pdev:	pci device struct
10205  *
10206  * Adapter hot plug remove entry point.
10207  *
10208  * Return value:
10209  * 	none
10210  **/
10211 static void ipr_remove(struct pci_dev *pdev)
10212 {
10213 	struct ipr_ioa_cfg *ioa_cfg = pci_get_drvdata(pdev);
10214 
10215 	ENTER;
10216 
10217 	ipr_remove_trace_file(&ioa_cfg->host->shost_dev.kobj,
10218 			      &ipr_trace_attr);
10219 	ipr_remove_dump_file(&ioa_cfg->host->shost_dev.kobj,
10220 			     &ipr_dump_attr);
10221 	scsi_remove_host(ioa_cfg->host);
10222 
10223 	__ipr_remove(pdev);
10224 
10225 	LEAVE;
10226 }
10227 
10228 /**
10229  * ipr_probe - Adapter hot plug add entry point
10230  *
10231  * Return value:
10232  * 	0 on success / non-zero on failure
10233  **/
10234 static int ipr_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
10235 {
10236 	struct ipr_ioa_cfg *ioa_cfg;
10237 	int rc, i;
10238 
10239 	rc = ipr_probe_ioa(pdev, dev_id);
10240 
10241 	if (rc)
10242 		return rc;
10243 
10244 	ioa_cfg = pci_get_drvdata(pdev);
10245 	rc = ipr_probe_ioa_part2(ioa_cfg);
10246 
10247 	if (rc) {
10248 		__ipr_remove(pdev);
10249 		return rc;
10250 	}
10251 
10252 	rc = scsi_add_host(ioa_cfg->host, &pdev->dev);
10253 
10254 	if (rc) {
10255 		__ipr_remove(pdev);
10256 		return rc;
10257 	}
10258 
10259 	rc = ipr_create_trace_file(&ioa_cfg->host->shost_dev.kobj,
10260 				   &ipr_trace_attr);
10261 
10262 	if (rc) {
10263 		scsi_remove_host(ioa_cfg->host);
10264 		__ipr_remove(pdev);
10265 		return rc;
10266 	}
10267 
10268 	rc = ipr_create_dump_file(&ioa_cfg->host->shost_dev.kobj,
10269 				   &ipr_dump_attr);
10270 
10271 	if (rc) {
10272 		ipr_remove_trace_file(&ioa_cfg->host->shost_dev.kobj,
10273 				      &ipr_trace_attr);
10274 		scsi_remove_host(ioa_cfg->host);
10275 		__ipr_remove(pdev);
10276 		return rc;
10277 	}
10278 
10279 	scsi_scan_host(ioa_cfg->host);
10280 	ioa_cfg->iopoll_weight = ioa_cfg->chip_cfg->iopoll_weight;
10281 
10282 	if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
10283 		for (i = 1; i < ioa_cfg->hrrq_num; i++) {
10284 			blk_iopoll_init(&ioa_cfg->hrrq[i].iopoll,
10285 					ioa_cfg->iopoll_weight, ipr_iopoll);
10286 			blk_iopoll_enable(&ioa_cfg->hrrq[i].iopoll);
10287 		}
10288 	}
10289 
10290 	schedule_work(&ioa_cfg->work_q);
10291 	return 0;
10292 }
10293 
10294 /**
10295  * ipr_shutdown - Shutdown handler.
10296  * @pdev:	pci device struct
10297  *
10298  * This function is invoked upon system shutdown/reboot. It will issue
10299  * an adapter shutdown to the adapter to flush the write cache.
10300  *
10301  * Return value:
10302  * 	none
10303  **/
10304 static void ipr_shutdown(struct pci_dev *pdev)
10305 {
10306 	struct ipr_ioa_cfg *ioa_cfg = pci_get_drvdata(pdev);
10307 	unsigned long lock_flags = 0;
10308 	enum ipr_shutdown_type shutdown_type = IPR_SHUTDOWN_NORMAL;
10309 	int i;
10310 
10311 	spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
10312 	if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
10313 		ioa_cfg->iopoll_weight = 0;
10314 		for (i = 1; i < ioa_cfg->hrrq_num; i++)
10315 			blk_iopoll_disable(&ioa_cfg->hrrq[i].iopoll);
10316 	}
10317 
10318 	while (ioa_cfg->in_reset_reload) {
10319 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
10320 		wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
10321 		spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
10322 	}
10323 
10324 	if (ipr_fast_reboot && system_state == SYSTEM_RESTART && ioa_cfg->sis64)
10325 		shutdown_type = IPR_SHUTDOWN_QUIESCE;
10326 
10327 	ipr_initiate_ioa_bringdown(ioa_cfg, shutdown_type);
10328 	spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
10329 	wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
10330 	if (ipr_fast_reboot && system_state == SYSTEM_RESTART && ioa_cfg->sis64) {
10331 		ipr_free_irqs(ioa_cfg);
10332 		pci_disable_device(ioa_cfg->pdev);
10333 	}
10334 }
10335 
10336 static struct pci_device_id ipr_pci_table[] = {
10337 	{ PCI_VENDOR_ID_MYLEX, PCI_DEVICE_ID_IBM_GEMSTONE,
10338 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_5702, 0, 0, 0 },
10339 	{ PCI_VENDOR_ID_MYLEX, PCI_DEVICE_ID_IBM_GEMSTONE,
10340 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_5703, 0, 0, 0 },
10341 	{ PCI_VENDOR_ID_MYLEX, PCI_DEVICE_ID_IBM_GEMSTONE,
10342 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_573D, 0, 0, 0 },
10343 	{ PCI_VENDOR_ID_MYLEX, PCI_DEVICE_ID_IBM_GEMSTONE,
10344 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_573E, 0, 0, 0 },
10345 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE,
10346 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_571B, 0, 0, 0 },
10347 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE,
10348 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_572E, 0, 0, 0 },
10349 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE,
10350 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_571A, 0, 0, 0 },
10351 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE,
10352 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_575B, 0, 0,
10353 		IPR_USE_LONG_TRANSOP_TIMEOUT },
10354 	{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_OBSIDIAN,
10355 	      PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_572A, 0, 0, 0 },
10356 	{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_OBSIDIAN,
10357 	      PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_572B, 0, 0,
10358 	      IPR_USE_LONG_TRANSOP_TIMEOUT },
10359 	{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_OBSIDIAN,
10360 	      PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_575C, 0, 0,
10361 	      IPR_USE_LONG_TRANSOP_TIMEOUT },
10362 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN,
10363 	      PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_572A, 0, 0, 0 },
10364 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN,
10365 	      PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_572B, 0, 0,
10366 	      IPR_USE_LONG_TRANSOP_TIMEOUT},
10367 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN,
10368 	      PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_575C, 0, 0,
10369 	      IPR_USE_LONG_TRANSOP_TIMEOUT },
10370 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN_E,
10371 	      PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_574E, 0, 0,
10372 	      IPR_USE_LONG_TRANSOP_TIMEOUT },
10373 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN_E,
10374 	      PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57B3, 0, 0, 0 },
10375 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN_E,
10376 	      PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57CC, 0, 0, 0 },
10377 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN_E,
10378 	      PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57B7, 0, 0,
10379 	      IPR_USE_LONG_TRANSOP_TIMEOUT | IPR_USE_PCI_WARM_RESET },
10380 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_SNIPE,
10381 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_2780, 0, 0, 0 },
10382 	{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_SCAMP,
10383 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_571E, 0, 0, 0 },
10384 	{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_SCAMP,
10385 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_571F, 0, 0,
10386 		IPR_USE_LONG_TRANSOP_TIMEOUT },
10387 	{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_SCAMP,
10388 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_572F, 0, 0,
10389 		IPR_USE_LONG_TRANSOP_TIMEOUT },
10390 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROC_FPGA_E2,
10391 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57B5, 0, 0, 0 },
10392 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROC_FPGA_E2,
10393 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_574D, 0, 0, 0 },
10394 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROC_FPGA_E2,
10395 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57B2, 0, 0, 0 },
10396 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROC_FPGA_E2,
10397 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57C0, 0, 0, 0 },
10398 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROC_FPGA_E2,
10399 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57C3, 0, 0, 0 },
10400 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROC_FPGA_E2,
10401 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57C4, 0, 0, 0 },
10402 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10403 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57B4, 0, 0, 0 },
10404 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10405 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57B1, 0, 0, 0 },
10406 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10407 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57C6, 0, 0, 0 },
10408 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10409 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57C8, 0, 0, 0 },
10410 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10411 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57CE, 0, 0, 0 },
10412 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10413 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57D5, 0, 0, 0 },
10414 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10415 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57D6, 0, 0, 0 },
10416 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10417 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57D7, 0, 0, 0 },
10418 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10419 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57D8, 0, 0, 0 },
10420 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10421 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57D9, 0, 0, 0 },
10422 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10423 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57DA, 0, 0, 0 },
10424 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10425 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57EB, 0, 0, 0 },
10426 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10427 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57EC, 0, 0, 0 },
10428 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10429 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57ED, 0, 0, 0 },
10430 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10431 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57EE, 0, 0, 0 },
10432 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10433 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57EF, 0, 0, 0 },
10434 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10435 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_57F0, 0, 0, 0 },
10436 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10437 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_2CCA, 0, 0, 0 },
10438 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10439 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_2CD2, 0, 0, 0 },
10440 	{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE,
10441 		PCI_VENDOR_ID_IBM, IPR_SUBS_DEV_ID_2CCD, 0, 0, 0 },
10442 	{ }
10443 };
10444 MODULE_DEVICE_TABLE(pci, ipr_pci_table);
10445 
10446 static const struct pci_error_handlers ipr_err_handler = {
10447 	.error_detected = ipr_pci_error_detected,
10448 	.mmio_enabled = ipr_pci_mmio_enabled,
10449 	.slot_reset = ipr_pci_slot_reset,
10450 };
10451 
10452 static struct pci_driver ipr_driver = {
10453 	.name = IPR_NAME,
10454 	.id_table = ipr_pci_table,
10455 	.probe = ipr_probe,
10456 	.remove = ipr_remove,
10457 	.shutdown = ipr_shutdown,
10458 	.err_handler = &ipr_err_handler,
10459 };
10460 
10461 /**
10462  * ipr_halt_done - Shutdown prepare completion
10463  *
10464  * Return value:
10465  * 	none
10466  **/
10467 static void ipr_halt_done(struct ipr_cmnd *ipr_cmd)
10468 {
10469 	list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q);
10470 }
10471 
10472 /**
10473  * ipr_halt - Issue shutdown prepare to all adapters
10474  *
10475  * Return value:
10476  * 	NOTIFY_OK on success / NOTIFY_DONE on failure
10477  **/
10478 static int ipr_halt(struct notifier_block *nb, ulong event, void *buf)
10479 {
10480 	struct ipr_cmnd *ipr_cmd;
10481 	struct ipr_ioa_cfg *ioa_cfg;
10482 	unsigned long flags = 0, driver_lock_flags;
10483 
10484 	if (event != SYS_RESTART && event != SYS_HALT && event != SYS_POWER_OFF)
10485 		return NOTIFY_DONE;
10486 
10487 	spin_lock_irqsave(&ipr_driver_lock, driver_lock_flags);
10488 
10489 	list_for_each_entry(ioa_cfg, &ipr_ioa_head, queue) {
10490 		spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
10491 		if (!ioa_cfg->hrrq[IPR_INIT_HRRQ].allow_cmds ||
10492 		    (ipr_fast_reboot && event == SYS_RESTART && ioa_cfg->sis64)) {
10493 			spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
10494 			continue;
10495 		}
10496 
10497 		ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
10498 		ipr_cmd->ioarcb.res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
10499 		ipr_cmd->ioarcb.cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
10500 		ipr_cmd->ioarcb.cmd_pkt.cdb[0] = IPR_IOA_SHUTDOWN;
10501 		ipr_cmd->ioarcb.cmd_pkt.cdb[1] = IPR_SHUTDOWN_PREPARE_FOR_NORMAL;
10502 
10503 		ipr_do_req(ipr_cmd, ipr_halt_done, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT);
10504 		spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
10505 	}
10506 	spin_unlock_irqrestore(&ipr_driver_lock, driver_lock_flags);
10507 
10508 	return NOTIFY_OK;
10509 }
10510 
10511 static struct notifier_block ipr_notifier = {
10512 	ipr_halt, NULL, 0
10513 };
10514 
10515 /**
10516  * ipr_init - Module entry point
10517  *
10518  * Return value:
10519  * 	0 on success / negative value on failure
10520  **/
10521 static int __init ipr_init(void)
10522 {
10523 	ipr_info("IBM Power RAID SCSI Device Driver version: %s %s\n",
10524 		 IPR_DRIVER_VERSION, IPR_DRIVER_DATE);
10525 
10526 	register_reboot_notifier(&ipr_notifier);
10527 	return pci_register_driver(&ipr_driver);
10528 }
10529 
10530 /**
10531  * ipr_exit - Module unload
10532  *
10533  * Module unload entry point.
10534  *
10535  * Return value:
10536  * 	none
10537  **/
10538 static void __exit ipr_exit(void)
10539 {
10540 	unregister_reboot_notifier(&ipr_notifier);
10541 	pci_unregister_driver(&ipr_driver);
10542 }
10543 
10544 module_init(ipr_init);
10545 module_exit(ipr_exit);
10546