xref: /openbmc/linux/drivers/scsi/pmcraid.h (revision f16aa285)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * pmcraid.h -- PMC Sierra MaxRAID controller driver header file
4  *
5  * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
6  *             PMC-Sierra Inc
7  *
8  * Copyright (C) 2008, 2009 PMC Sierra Inc.
9  */
10 
11 #ifndef _PMCRAID_H
12 #define _PMCRAID_H
13 
14 #include <linux/types.h>
15 #include <linux/completion.h>
16 #include <linux/list.h>
17 #include <scsi/scsi.h>
18 #include <scsi/scsi_cmnd.h>
19 #include <linux/cdev.h>
20 #include <net/netlink.h>
21 #include <net/genetlink.h>
22 #include <linux/connector.h>
23 /*
24  * Driver name   : string representing the driver name
25  * Device file   : /dev file to be used for management interfaces
26  * Driver version: version string in major_version.minor_version.patch format
27  * Driver date   : date information in "Mon dd yyyy" format
28  */
29 #define PMCRAID_DRIVER_NAME		"PMC MaxRAID"
30 #define PMCRAID_DEVFILE			"pmcsas"
31 #define PMCRAID_DRIVER_VERSION		"1.0.3"
32 
33 #define PMCRAID_FW_VERSION_1		0x002
34 
35 /* Maximum number of adapters supported by current version of the driver */
36 #define PMCRAID_MAX_ADAPTERS		1024
37 
38 /* Bit definitions as per firmware, bit position [0][1][2].....[31] */
39 #define PMC_BIT8(n)          (1 << (7-n))
40 #define PMC_BIT16(n)         (1 << (15-n))
41 #define PMC_BIT32(n)         (1 << (31-n))
42 
43 /* PMC PCI vendor ID and device ID values */
44 #define PCI_VENDOR_ID_PMC			0x11F8
45 #define PCI_DEVICE_ID_PMC_MAXRAID		0x5220
46 
47 /*
48  * MAX_CMD          : maximum commands that can be outstanding with IOA
49  * MAX_IO_CMD       : command blocks available for IO commands
50  * MAX_HCAM_CMD     : command blocks available for HCAMS
51  * MAX_INTERNAL_CMD : command blocks available for internal commands like reset
52  */
53 #define PMCRAID_MAX_CMD				1024
54 #define PMCRAID_MAX_IO_CMD			1020
55 #define PMCRAID_MAX_HCAM_CMD			2
56 #define PMCRAID_MAX_INTERNAL_CMD		2
57 
58 /* MAX_IOADLS       : max number of scatter-gather lists supported by IOA
59  * IOADLS_INTERNAL  : number of ioadls included as part of IOARCB.
60  * IOADLS_EXTERNAL  : number of ioadls allocated external to IOARCB
61  */
62 #define PMCRAID_IOADLS_INTERNAL			 27
63 #define PMCRAID_IOADLS_EXTERNAL			 37
64 #define PMCRAID_MAX_IOADLS			 PMCRAID_IOADLS_INTERNAL
65 
66 /* HRRQ_ENTRY_SIZE  : size of hrrq buffer
67  * IOARCB_ALIGNMENT : alignment required for IOARCB
68  * IOADL_ALIGNMENT  : alignment requirement for IOADLs
69  * MSIX_VECTORS     : number of MSIX vectors supported
70  */
71 #define HRRQ_ENTRY_SIZE                          sizeof(__le32)
72 #define PMCRAID_IOARCB_ALIGNMENT                 32
73 #define PMCRAID_IOADL_ALIGNMENT                  16
74 #define PMCRAID_IOASA_ALIGNMENT                  4
75 #define PMCRAID_NUM_MSIX_VECTORS                 16
76 
77 /* various other limits */
78 #define PMCRAID_VENDOR_ID_LEN			8
79 #define PMCRAID_PRODUCT_ID_LEN			16
80 #define PMCRAID_SERIAL_NUM_LEN			8
81 #define PMCRAID_LUN_LEN				8
82 #define PMCRAID_MAX_CDB_LEN			16
83 #define PMCRAID_DEVICE_ID_LEN			8
84 #define PMCRAID_SENSE_DATA_LEN			256
85 #define PMCRAID_ADD_CMD_PARAM_LEN		48
86 
87 #define PMCRAID_MAX_BUS_TO_SCAN                  1
88 #define PMCRAID_MAX_NUM_TARGETS_PER_BUS          256
89 #define PMCRAID_MAX_NUM_LUNS_PER_TARGET          8
90 
91 /* IOA bus/target/lun number of IOA resources */
92 #define PMCRAID_IOA_BUS_ID                       0xfe
93 #define PMCRAID_IOA_TARGET_ID                    0xff
94 #define PMCRAID_IOA_LUN_ID                       0xff
95 #define PMCRAID_VSET_BUS_ID                      0x1
96 #define PMCRAID_VSET_LUN_ID                      0x0
97 #define PMCRAID_PHYS_BUS_ID                      0x0
98 #define PMCRAID_VIRTUAL_ENCL_BUS_ID              0x8
99 #define PMCRAID_MAX_VSET_TARGETS                 0x7F
100 #define PMCRAID_MAX_VSET_LUNS_PER_TARGET         8
101 
102 #define PMCRAID_IOA_MAX_SECTORS                  32767
103 #define PMCRAID_VSET_MAX_SECTORS                 512
104 #define PMCRAID_MAX_CMD_PER_LUN                  254
105 
106 /* Number of configuration table entries (resources), includes 1 FP,
107  * 1 Enclosure device
108  */
109 #define PMCRAID_MAX_RESOURCES                    256
110 
111 /* Adapter Commands used by driver */
112 #define PMCRAID_QUERY_RESOURCE_STATE             0xC2
113 #define PMCRAID_RESET_DEVICE                     0xC3
114 /* options to select reset target */
115 #define ENABLE_RESET_MODIFIER                    0x80
116 #define RESET_DEVICE_LUN                         0x40
117 #define RESET_DEVICE_TARGET                      0x20
118 #define RESET_DEVICE_BUS                         0x10
119 
120 #define PMCRAID_IDENTIFY_HRRQ                    0xC4
121 #define PMCRAID_QUERY_IOA_CONFIG                 0xC5
122 #define PMCRAID_QUERY_CMD_STATUS		 0xCB
123 #define PMCRAID_ABORT_CMD                        0xC7
124 
125 /* CANCEL ALL command, provides option for setting SYNC_COMPLETE
126  * on the target resources for which commands got cancelled
127  */
128 #define PMCRAID_CANCEL_ALL_REQUESTS		 0xCE
129 #define PMCRAID_SYNC_COMPLETE_AFTER_CANCEL       PMC_BIT8(0)
130 
131 /* HCAM command and types of HCAM supported by IOA */
132 #define PMCRAID_HOST_CONTROLLED_ASYNC            0xCF
133 #define PMCRAID_HCAM_CODE_CONFIG_CHANGE          0x01
134 #define PMCRAID_HCAM_CODE_LOG_DATA               0x02
135 
136 /* IOA shutdown command and various shutdown types */
137 #define PMCRAID_IOA_SHUTDOWN                     0xF7
138 #define PMCRAID_SHUTDOWN_NORMAL                  0x00
139 #define PMCRAID_SHUTDOWN_PREPARE_FOR_NORMAL      0x40
140 #define PMCRAID_SHUTDOWN_NONE                    0x100
141 #define PMCRAID_SHUTDOWN_ABBREV                  0x80
142 
143 /* SET SUPPORTED DEVICES command and the option to select all the
144  * devices to be supported
145  */
146 #define PMCRAID_SET_SUPPORTED_DEVICES            0xFB
147 #define ALL_DEVICES_SUPPORTED                    PMC_BIT8(0)
148 
149 /* This option is used with SCSI WRITE_BUFFER command */
150 #define PMCRAID_WR_BUF_DOWNLOAD_AND_SAVE         0x05
151 
152 /* IOASC Codes used by driver */
153 #define PMCRAID_IOASC_SENSE_MASK                 0xFFFFFF00
154 #define PMCRAID_IOASC_SENSE_KEY(ioasc)           ((ioasc) >> 24)
155 #define PMCRAID_IOASC_SENSE_CODE(ioasc)          (((ioasc) & 0x00ff0000) >> 16)
156 #define PMCRAID_IOASC_SENSE_QUAL(ioasc)          (((ioasc) & 0x0000ff00) >> 8)
157 #define PMCRAID_IOASC_SENSE_STATUS(ioasc)        ((ioasc) & 0x000000ff)
158 
159 #define PMCRAID_IOASC_GOOD_COMPLETION			0x00000000
160 #define PMCRAID_IOASC_GC_IOARCB_NOTFOUND		0x005A0000
161 #define PMCRAID_IOASC_NR_INIT_CMD_REQUIRED		0x02040200
162 #define PMCRAID_IOASC_NR_IOA_RESET_REQUIRED		0x02048000
163 #define PMCRAID_IOASC_NR_SYNC_REQUIRED			0x023F0000
164 #define PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC		0x03110C00
165 #define PMCRAID_IOASC_HW_CANNOT_COMMUNICATE		0x04050000
166 #define PMCRAID_IOASC_HW_DEVICE_TIMEOUT			0x04080100
167 #define PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR	0x04448500
168 #define PMCRAID_IOASC_HW_IOA_RESET_REQUIRED		0x04448600
169 #define PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE        0x05250000
170 #define PMCRAID_IOASC_AC_TERMINATED_BY_HOST		0x0B5A0000
171 #define PMCRAID_IOASC_UA_BUS_WAS_RESET			0x06290000
172 #define PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC		0x06908B00
173 #define PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER		0x06298000
174 
175 /* Driver defined IOASCs */
176 #define PMCRAID_IOASC_IOA_WAS_RESET			0x10000001
177 #define PMCRAID_IOASC_PCI_ACCESS_ERROR			0x10000002
178 
179 /* Various timeout values (in milliseconds) used. If any of these are chip
180  * specific, move them to pmcraid_chip_details structure.
181  */
182 #define PMCRAID_PCI_DEASSERT_TIMEOUT		2000
183 #define PMCRAID_BIST_TIMEOUT			2000
184 #define PMCRAID_AENWAIT_TIMEOUT			5000
185 #define PMCRAID_TRANSOP_TIMEOUT			60000
186 
187 #define PMCRAID_RESET_TIMEOUT			(2 * HZ)
188 #define PMCRAID_CHECK_FOR_RESET_TIMEOUT		((HZ / 10))
189 #define PMCRAID_VSET_IO_TIMEOUT			(60 * HZ)
190 #define PMCRAID_INTERNAL_TIMEOUT		(60 * HZ)
191 #define PMCRAID_SHUTDOWN_TIMEOUT		(150 * HZ)
192 #define PMCRAID_RESET_BUS_TIMEOUT		(60 * HZ)
193 #define PMCRAID_RESET_HOST_TIMEOUT		(150 * HZ)
194 #define PMCRAID_REQUEST_SENSE_TIMEOUT		(30 * HZ)
195 #define PMCRAID_SET_SUP_DEV_TIMEOUT		(2 * 60 * HZ)
196 
197 /* structure to represent a scatter-gather element (IOADL descriptor) */
198 struct pmcraid_ioadl_desc {
199 	__le64 address;
200 	__le32 data_len;
201 	__u8  reserved[3];
202 	__u8  flags;
203 } __attribute__((packed, aligned(PMCRAID_IOADL_ALIGNMENT)));
204 
205 /* pmcraid_ioadl_desc.flags values */
206 #define IOADL_FLAGS_CHAINED      PMC_BIT8(0)
207 #define IOADL_FLAGS_LAST_DESC    PMC_BIT8(1)
208 #define IOADL_FLAGS_READ_LAST    PMC_BIT8(1)
209 #define IOADL_FLAGS_WRITE_LAST   PMC_BIT8(1)
210 
211 
212 /* additional IOARCB data which can be CDB or additional request parameters
213  * or list of IOADLs. Firmware supports max of 512 bytes for IOARCB, hence then
214  * number of IOADLs are limted to 27. In case they are more than 27, they will
215  * be used in chained form
216  */
217 struct pmcraid_ioarcb_add_data {
218 	union {
219 		struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_INTERNAL];
220 		__u8 add_cmd_params[PMCRAID_ADD_CMD_PARAM_LEN];
221 	} u;
222 };
223 
224 /*
225  * IOA Request Control Block
226  */
227 struct pmcraid_ioarcb {
228 	__le64 ioarcb_bus_addr;
229 	__le32 resource_handle;
230 	__le32 response_handle;
231 	__le64 ioadl_bus_addr;
232 	__le32 ioadl_length;
233 	__le32 data_transfer_length;
234 	__le64 ioasa_bus_addr;
235 	__le16 ioasa_len;
236 	__le16 cmd_timeout;
237 	__le16 add_cmd_param_offset;
238 	__le16 add_cmd_param_length;
239 	__le32 reserved1[2];
240 	__le32 reserved2;
241 	__u8  request_type;
242 	__u8  request_flags0;
243 	__u8  request_flags1;
244 	__u8  hrrq_id;
245 	__u8  cdb[PMCRAID_MAX_CDB_LEN];
246 	struct pmcraid_ioarcb_add_data add_data;
247 };
248 
249 /* well known resource handle values */
250 #define PMCRAID_IOA_RES_HANDLE        0xffffffff
251 #define PMCRAID_INVALID_RES_HANDLE    0
252 
253 /* pmcraid_ioarcb.request_type values */
254 #define REQ_TYPE_SCSI                 0x00
255 #define REQ_TYPE_IOACMD               0x01
256 #define REQ_TYPE_HCAM                 0x02
257 
258 /* pmcraid_ioarcb.flags0 values */
259 #define TRANSFER_DIR_WRITE            PMC_BIT8(0)
260 #define INHIBIT_UL_CHECK              PMC_BIT8(2)
261 #define SYNC_OVERRIDE                 PMC_BIT8(3)
262 #define SYNC_COMPLETE                 PMC_BIT8(4)
263 #define NO_LINK_DESCS                 PMC_BIT8(5)
264 
265 /* pmcraid_ioarcb.flags1 values */
266 #define DELAY_AFTER_RESET             PMC_BIT8(0)
267 #define TASK_TAG_SIMPLE               0x10
268 #define TASK_TAG_ORDERED              0x20
269 #define TASK_TAG_QUEUE_HEAD           0x30
270 
271 /* toggle bit offset in response handle */
272 #define HRRQ_TOGGLE_BIT               0x01
273 #define HRRQ_RESPONSE_BIT             0x02
274 
275 /* IOA Status Area */
276 struct pmcraid_ioasa_vset {
277 	__le32 failing_lba_hi;
278 	__le32 failing_lba_lo;
279 	__le32 reserved;
280 } __attribute__((packed, aligned(4)));
281 
282 struct pmcraid_ioasa {
283 	__le32 ioasc;
284 	__le16 returned_status_length;
285 	__le16 available_status_length;
286 	__le32 residual_data_length;
287 	__le32 ilid;
288 	__le32 fd_ioasc;
289 	__le32 fd_res_address;
290 	__le32 fd_res_handle;
291 	__le32 reserved;
292 
293 	/* resource specific sense information */
294 	union {
295 		struct pmcraid_ioasa_vset vset;
296 	} u;
297 
298 	/* IOA autosense data */
299 	__le16 auto_sense_length;
300 	__le16 error_data_length;
301 	__u8  sense_data[PMCRAID_SENSE_DATA_LEN];
302 } __attribute__((packed, aligned(4)));
303 
304 #define PMCRAID_DRIVER_ILID           0xffffffff
305 
306 /* Config Table Entry per Resource */
307 struct pmcraid_config_table_entry {
308 	__u8  resource_type;
309 	__u8  bus_protocol;
310 	__le16 array_id;
311 	__u8  common_flags0;
312 	__u8  common_flags1;
313 	__u8  unique_flags0;
314 	__u8  unique_flags1;	/*also used as vset target_id */
315 	__le32 resource_handle;
316 	__le32 resource_address;
317 	__u8  device_id[PMCRAID_DEVICE_ID_LEN];
318 	__u8  lun[PMCRAID_LUN_LEN];
319 } __attribute__((packed, aligned(4)));
320 
321 /* extended configuration table sizes are also of 32 bytes in size */
322 struct pmcraid_config_table_entry_ext {
323 	struct pmcraid_config_table_entry cfgte;
324 };
325 
326 /* resource types (config_table_entry.resource_type values) */
327 #define RES_TYPE_AF_DASD     0x00
328 #define RES_TYPE_GSCSI       0x01
329 #define RES_TYPE_VSET        0x02
330 #define RES_TYPE_IOA_FP      0xFF
331 
332 #define RES_IS_IOA(res)      ((res).resource_type == RES_TYPE_IOA_FP)
333 #define RES_IS_GSCSI(res)    ((res).resource_type == RES_TYPE_GSCSI)
334 #define RES_IS_VSET(res)     ((res).resource_type == RES_TYPE_VSET)
335 #define RES_IS_AFDASD(res)   ((res).resource_type == RES_TYPE_AF_DASD)
336 
337 /* bus_protocol values used by driver */
338 #define RES_TYPE_VENCLOSURE  0x8
339 
340 /* config_table_entry.common_flags0 */
341 #define MULTIPATH_RESOURCE   PMC_BIT32(0)
342 
343 /* unique_flags1 */
344 #define IMPORT_MODE_MANUAL   PMC_BIT8(0)
345 
346 /* well known resource handle values */
347 #define RES_HANDLE_IOA       0xFFFFFFFF
348 #define RES_HANDLE_NONE      0x00000000
349 
350 /* well known resource address values */
351 #define RES_ADDRESS_IOAFP    0xFEFFFFFF
352 #define RES_ADDRESS_INVALID  0xFFFFFFFF
353 
354 /* BUS/TARGET/LUN values from resource_addrr */
355 #define RES_BUS(res_addr)    (le32_to_cpu(res_addr) & 0xFF)
356 #define RES_TARGET(res_addr) ((le32_to_cpu(res_addr) >> 16) & 0xFF)
357 #define RES_LUN(res_addr)    0x0
358 
359 /* configuration table structure */
360 struct pmcraid_config_table {
361 	__le16 num_entries;
362 	__u8  table_format;
363 	__u8  reserved1;
364 	__u8  flags;
365 	__u8  reserved2[11];
366 	union {
367 		struct pmcraid_config_table_entry
368 				entries[PMCRAID_MAX_RESOURCES];
369 		struct pmcraid_config_table_entry_ext
370 				entries_ext[PMCRAID_MAX_RESOURCES];
371 	};
372 } __attribute__((packed, aligned(4)));
373 
374 /* config_table.flags value */
375 #define MICROCODE_UPDATE_REQUIRED		PMC_BIT32(0)
376 
377 /*
378  * HCAM format
379  */
380 #define PMCRAID_HOSTRCB_LDNSIZE			4056
381 
382 /* Error log notification format */
383 struct pmcraid_hostrcb_error {
384 	__le32 fd_ioasc;
385 	__le32 fd_ra;
386 	__le32 fd_rh;
387 	__le32 prc;
388 	union {
389 		__u8 data[PMCRAID_HOSTRCB_LDNSIZE];
390 	} u;
391 } __attribute__ ((packed, aligned(4)));
392 
393 struct pmcraid_hcam_hdr {
394 	__u8  op_code;
395 	__u8  notification_type;
396 	__u8  notification_lost;
397 	__u8  flags;
398 	__u8  overlay_id;
399 	__u8  reserved1[3];
400 	__le32 ilid;
401 	__le32 timestamp1;
402 	__le32 timestamp2;
403 	__le32 data_len;
404 } __attribute__((packed, aligned(4)));
405 
406 #define PMCRAID_AEN_GROUP	0x3
407 
408 struct pmcraid_hcam_ccn {
409 	struct pmcraid_hcam_hdr header;
410 	struct pmcraid_config_table_entry cfg_entry;
411 	struct pmcraid_config_table_entry cfg_entry_old;
412 } __attribute__((packed, aligned(4)));
413 
414 #define PMCRAID_CCN_EXT_SIZE	3944
415 struct pmcraid_hcam_ccn_ext {
416 	struct pmcraid_hcam_hdr header;
417 	struct pmcraid_config_table_entry_ext cfg_entry;
418 	struct pmcraid_config_table_entry_ext cfg_entry_old;
419 	__u8   reserved[PMCRAID_CCN_EXT_SIZE];
420 } __attribute__((packed, aligned(4)));
421 
422 struct pmcraid_hcam_ldn {
423 	struct pmcraid_hcam_hdr header;
424 	struct pmcraid_hostrcb_error error_log;
425 } __attribute__((packed, aligned(4)));
426 
427 /* pmcraid_hcam.op_code values */
428 #define HOSTRCB_TYPE_CCN			0xE1
429 #define HOSTRCB_TYPE_LDN			0xE2
430 
431 /* pmcraid_hcam.notification_type values */
432 #define NOTIFICATION_TYPE_ENTRY_CHANGED		0x0
433 #define NOTIFICATION_TYPE_ENTRY_NEW		0x1
434 #define NOTIFICATION_TYPE_ENTRY_DELETED		0x2
435 #define NOTIFICATION_TYPE_STATE_CHANGE		0x3
436 #define NOTIFICATION_TYPE_ENTRY_STATECHANGED	0x4
437 #define NOTIFICATION_TYPE_ERROR_LOG		0x10
438 #define NOTIFICATION_TYPE_INFORMATION_LOG	0x11
439 
440 #define HOSTRCB_NOTIFICATIONS_LOST		PMC_BIT8(0)
441 
442 /* pmcraid_hcam.flags values */
443 #define HOSTRCB_INTERNAL_OP_ERROR		PMC_BIT8(0)
444 #define HOSTRCB_ERROR_RESPONSE_SENT		PMC_BIT8(1)
445 
446 /* pmcraid_hcam.overlay_id values */
447 #define HOSTRCB_OVERLAY_ID_08			0x08
448 #define HOSTRCB_OVERLAY_ID_09			0x09
449 #define HOSTRCB_OVERLAY_ID_11			0x11
450 #define HOSTRCB_OVERLAY_ID_12			0x12
451 #define HOSTRCB_OVERLAY_ID_13			0x13
452 #define HOSTRCB_OVERLAY_ID_14			0x14
453 #define HOSTRCB_OVERLAY_ID_16			0x16
454 #define HOSTRCB_OVERLAY_ID_17			0x17
455 #define HOSTRCB_OVERLAY_ID_20			0x20
456 #define HOSTRCB_OVERLAY_ID_FF			0xFF
457 
458 /* Implementation specific card details */
459 struct pmcraid_chip_details {
460 	/* hardware register offsets */
461 	unsigned long  ioastatus;
462 	unsigned long  ioarrin;
463 	unsigned long  mailbox;
464 	unsigned long  global_intr_mask;
465 	unsigned long  ioa_host_intr;
466 	unsigned long  ioa_host_msix_intr;
467 	unsigned long  ioa_host_intr_clr;
468 	unsigned long  ioa_host_mask;
469 	unsigned long  ioa_host_mask_clr;
470 	unsigned long  host_ioa_intr;
471 	unsigned long  host_ioa_intr_clr;
472 
473 	/* timeout used during transitional to operational state */
474 	unsigned long transop_timeout;
475 };
476 
477 /* IOA to HOST doorbells (interrupts) */
478 #define INTRS_TRANSITION_TO_OPERATIONAL		PMC_BIT32(0)
479 #define INTRS_IOARCB_TRANSFER_FAILED		PMC_BIT32(3)
480 #define INTRS_IOA_UNIT_CHECK			PMC_BIT32(4)
481 #define INTRS_NO_HRRQ_FOR_CMD_RESPONSE		PMC_BIT32(5)
482 #define INTRS_CRITICAL_OP_IN_PROGRESS		PMC_BIT32(6)
483 #define INTRS_IO_DEBUG_ACK			PMC_BIT32(7)
484 #define INTRS_IOARRIN_LOST			PMC_BIT32(27)
485 #define INTRS_SYSTEM_BUS_MMIO_ERROR		PMC_BIT32(28)
486 #define INTRS_IOA_PROCESSOR_ERROR		PMC_BIT32(29)
487 #define INTRS_HRRQ_VALID			PMC_BIT32(30)
488 #define INTRS_OPERATIONAL_STATUS		PMC_BIT32(0)
489 #define INTRS_ALLOW_MSIX_VECTOR0		PMC_BIT32(31)
490 
491 /* Host to IOA Doorbells */
492 #define DOORBELL_RUNTIME_RESET			PMC_BIT32(1)
493 #define DOORBELL_IOA_RESET_ALERT		PMC_BIT32(7)
494 #define DOORBELL_IOA_DEBUG_ALERT		PMC_BIT32(9)
495 #define DOORBELL_ENABLE_DESTRUCTIVE_DIAGS	PMC_BIT32(8)
496 #define DOORBELL_IOA_START_BIST			PMC_BIT32(23)
497 #define DOORBELL_INTR_MODE_MSIX			PMC_BIT32(25)
498 #define DOORBELL_INTR_MSIX_CLR			PMC_BIT32(26)
499 #define DOORBELL_RESET_IOA			PMC_BIT32(31)
500 
501 /* Global interrupt mask register value */
502 #define GLOBAL_INTERRUPT_MASK			0x5ULL
503 
504 #define PMCRAID_ERROR_INTERRUPTS	(INTRS_IOARCB_TRANSFER_FAILED | \
505 					 INTRS_IOA_UNIT_CHECK | \
506 					 INTRS_NO_HRRQ_FOR_CMD_RESPONSE | \
507 					 INTRS_IOARRIN_LOST | \
508 					 INTRS_SYSTEM_BUS_MMIO_ERROR | \
509 					 INTRS_IOA_PROCESSOR_ERROR)
510 
511 #define PMCRAID_PCI_INTERRUPTS		(PMCRAID_ERROR_INTERRUPTS | \
512 					 INTRS_HRRQ_VALID | \
513 					 INTRS_TRANSITION_TO_OPERATIONAL |\
514 					 INTRS_ALLOW_MSIX_VECTOR0)
515 
516 /* control_block, associated with each of the commands contains IOARCB, IOADLs
517  * memory for IOASA. Additional 3 * 16 bytes are allocated in order to support
518  * additional request parameters (of max size 48) any command.
519  */
520 struct pmcraid_control_block {
521 	struct pmcraid_ioarcb ioarcb;
522 	struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_EXTERNAL + 3];
523 	struct pmcraid_ioasa ioasa;
524 } __attribute__ ((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
525 
526 /* pmcraid_sglist - Scatter-gather list allocated for passthrough ioctls
527  */
528 struct pmcraid_sglist {
529 	u32 order;
530 	u32 num_sg;
531 	u32 num_dma_sg;
532 	struct scatterlist *scatterlist;
533 };
534 
535 /* page D0 inquiry data of focal point resource */
536 struct pmcraid_inquiry_data {
537 	__u8	ph_dev_type;
538 	__u8	page_code;
539 	__u8	reserved1;
540 	__u8	add_page_len;
541 	__u8	length;
542 	__u8	reserved2;
543 	__be16	fw_version;
544 	__u8	reserved3[16];
545 };
546 
547 #define PMCRAID_TIMESTAMP_LEN		12
548 #define PMCRAID_REQ_TM_STR_LEN		6
549 #define PMCRAID_SCSI_SET_TIMESTAMP	0xA4
550 #define PMCRAID_SCSI_SERVICE_ACTION	0x0F
551 
552 struct pmcraid_timestamp_data {
553 	__u8 reserved1[4];
554 	__u8 timestamp[PMCRAID_REQ_TM_STR_LEN];		/* current time value */
555 	__u8 reserved2[2];
556 };
557 
558 /* pmcraid_cmd - LLD representation of SCSI command */
559 struct pmcraid_cmd {
560 
561 	/* Ptr and bus address of DMA.able control block for this command */
562 	struct pmcraid_control_block *ioa_cb;
563 	dma_addr_t ioa_cb_bus_addr;
564 	dma_addr_t dma_handle;
565 
566 	/* pointer to mid layer structure of SCSI commands */
567 	struct scsi_cmnd *scsi_cmd;
568 
569 	struct list_head free_list;
570 	struct completion wait_for_completion;
571 	struct timer_list timer;	/* needed for internal commands */
572 	u32 timeout;			/* current timeout value */
573 	u32 index;			/* index into the command list */
574 	u8 completion_req;		/* for handling internal commands */
575 	u8 release;			/* for handling completions */
576 
577 	void (*cmd_done) (struct pmcraid_cmd *);
578 	struct pmcraid_instance *drv_inst;
579 
580 	struct pmcraid_sglist *sglist; /* used for passthrough IOCTLs */
581 
582 	/* scratch used */
583 	union {
584 		/* during reset sequence */
585 		unsigned long time_left;
586 		struct pmcraid_resource_entry *res;
587 		int hrrq_index;
588 
589 		/* used during IO command error handling. Sense buffer
590 		 * for REQUEST SENSE command if firmware is not sending
591 		 * auto sense data
592 		 */
593 		struct  {
594 			u8 *sense_buffer;
595 			dma_addr_t sense_buffer_dma;
596 		};
597 	};
598 };
599 
600 /*
601  * Interrupt registers of IOA
602  */
603 struct pmcraid_interrupts {
604 	void __iomem *ioa_host_interrupt_reg;
605 	void __iomem *ioa_host_msix_interrupt_reg;
606 	void __iomem *ioa_host_interrupt_clr_reg;
607 	void __iomem *ioa_host_interrupt_mask_reg;
608 	void __iomem *ioa_host_interrupt_mask_clr_reg;
609 	void __iomem *global_interrupt_mask_reg;
610 	void __iomem *host_ioa_interrupt_reg;
611 	void __iomem *host_ioa_interrupt_clr_reg;
612 };
613 
614 /* ISR parameters LLD allocates (one for each MSI-X if enabled) vectors */
615 struct pmcraid_isr_param {
616 	struct pmcraid_instance *drv_inst;
617 	u8 hrrq_id;			/* hrrq entry index */
618 };
619 
620 
621 /* AEN message header sent as part of event data to applications */
622 struct pmcraid_aen_msg {
623 	u32 hostno;
624 	u32 length;
625 	u8  reserved[8];
626 	u8  data[];
627 };
628 
629 /* Controller state event message type */
630 struct pmcraid_state_msg {
631 	struct pmcraid_aen_msg msg;
632 	u32 ioa_state;
633 };
634 
635 #define PMC_DEVICE_EVENT_RESET_START		0x11000000
636 #define PMC_DEVICE_EVENT_RESET_SUCCESS		0x11000001
637 #define PMC_DEVICE_EVENT_RESET_FAILED		0x11000002
638 #define PMC_DEVICE_EVENT_SHUTDOWN_START		0x11000003
639 #define PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS	0x11000004
640 #define PMC_DEVICE_EVENT_SHUTDOWN_FAILED	0x11000005
641 
642 struct pmcraid_hostrcb {
643 	struct pmcraid_instance *drv_inst;
644 	struct pmcraid_aen_msg *msg;
645 	struct pmcraid_hcam_hdr *hcam;	/* pointer to hcam buffer */
646 	struct pmcraid_cmd  *cmd;       /* pointer to command block used */
647 	dma_addr_t baddr;		/* system address of hcam buffer */
648 	atomic_t ignore;		/* process HCAM response ? */
649 };
650 
651 #define PMCRAID_AEN_HDR_SIZE	sizeof(struct pmcraid_aen_msg)
652 
653 
654 
655 /*
656  * Per adapter structure maintained by LLD
657  */
658 struct pmcraid_instance {
659 	/* Array of allowed-to-be-exposed resources, initialized from
660 	 * Configutation Table, later updated with CCNs
661 	 */
662 	struct pmcraid_resource_entry *res_entries;
663 
664 	struct list_head free_res_q;	/* res_entries lists for easy lookup */
665 	struct list_head used_res_q;	/* List of to be exposed resources */
666 	spinlock_t resource_lock;	/* spinlock to protect resource list */
667 
668 	void __iomem *mapped_dma_addr;
669 	void __iomem *ioa_status;	/* Iomapped IOA status register */
670 	void __iomem *mailbox;		/* Iomapped mailbox register */
671 	void __iomem *ioarrin;		/* IOmapped IOARR IN register */
672 
673 	struct pmcraid_interrupts int_regs;
674 	struct pmcraid_chip_details *chip_cfg;
675 
676 	/* HostRCBs needed for HCAM */
677 	struct pmcraid_hostrcb ldn;
678 	struct pmcraid_hostrcb ccn;
679 	struct pmcraid_state_msg scn;	/* controller state change msg */
680 
681 
682 	/* Bus address of start of HRRQ */
683 	dma_addr_t hrrq_start_bus_addr[PMCRAID_NUM_MSIX_VECTORS];
684 
685 	/* Pointer to 1st entry of HRRQ */
686 	__le32 *hrrq_start[PMCRAID_NUM_MSIX_VECTORS];
687 
688 	/* Pointer to last entry of HRRQ */
689 	__le32 *hrrq_end[PMCRAID_NUM_MSIX_VECTORS];
690 
691 	/* Pointer to current pointer of hrrq */
692 	__le32 *hrrq_curr[PMCRAID_NUM_MSIX_VECTORS];
693 
694 	/* Lock for HRRQ access */
695 	spinlock_t hrrq_lock[PMCRAID_NUM_MSIX_VECTORS];
696 
697 	struct pmcraid_inquiry_data *inq_data;
698 	dma_addr_t  inq_data_baddr;
699 
700 	struct pmcraid_timestamp_data *timestamp_data;
701 	dma_addr_t  timestamp_data_baddr;
702 
703 	/* size of configuration table entry, varies based on the firmware */
704 	u32	config_table_entry_size;
705 
706 	/* Expected toggle bit at host */
707 	u8 host_toggle_bit[PMCRAID_NUM_MSIX_VECTORS];
708 
709 
710 	/* Wait Q for  threads to wait for Reset IOA completion */
711 	wait_queue_head_t reset_wait_q;
712 	struct pmcraid_cmd *reset_cmd;
713 
714 	/* structures for supporting SIGIO based AEN. */
715 	struct fasync_struct *aen_queue;
716 	struct mutex aen_queue_lock;	/* lock for aen subscribers list */
717 	struct cdev cdev;
718 
719 	struct Scsi_Host *host;	/* mid layer interface structure handle */
720 	struct pci_dev *pdev;	/* PCI device structure handle */
721 
722 	/* No of Reset IOA retries . IOA marked dead if threshold exceeds */
723 	u8 ioa_reset_attempts;
724 #define PMCRAID_RESET_ATTEMPTS 3
725 
726 	u8  current_log_level;	/* default level for logging IOASC errors */
727 
728 	u8  num_hrrq;		/* Number of interrupt vectors allocated */
729 	u8  interrupt_mode;	/* current interrupt mode legacy or msix */
730 	dev_t dev;		/* Major-Minor numbers for Char device */
731 
732 	/* Used as ISR handler argument */
733 	struct pmcraid_isr_param hrrq_vector[PMCRAID_NUM_MSIX_VECTORS];
734 
735 	/* Message id as filled in last fired IOARCB, used to identify HRRQ */
736 	atomic_t last_message_id;
737 
738 	/* configuration table */
739 	struct pmcraid_config_table *cfg_table;
740 	dma_addr_t cfg_table_bus_addr;
741 
742 	/* structures related to command blocks */
743 	struct kmem_cache *cmd_cachep;		/* cache for cmd blocks */
744 	struct dma_pool *control_pool;		/* pool for control blocks */
745 	char   cmd_pool_name[64];		/* name of cmd cache */
746 	char   ctl_pool_name[64];		/* name of control cache */
747 
748 	struct pmcraid_cmd *cmd_list[PMCRAID_MAX_CMD];
749 
750 	struct list_head free_cmd_pool;
751 	struct list_head pending_cmd_pool;
752 	spinlock_t free_pool_lock;		/* free pool lock */
753 	spinlock_t pending_pool_lock;		/* pending pool lock */
754 
755 	/* Tasklet to handle deferred processing */
756 	struct tasklet_struct isr_tasklet[PMCRAID_NUM_MSIX_VECTORS];
757 
758 	/* Work-queue (Shared) for deferred reset processing */
759 	struct work_struct worker_q;
760 
761 	/* No of IO commands pending with FW */
762 	atomic_t outstanding_cmds;
763 
764 	/* should add/delete resources to mid-layer now ?*/
765 	atomic_t expose_resources;
766 
767 
768 
769 	u32 ioa_state:4;	/* For IOA Reset sequence FSM */
770 #define IOA_STATE_OPERATIONAL       0x0
771 #define IOA_STATE_UNKNOWN           0x1
772 #define IOA_STATE_DEAD              0x2
773 #define IOA_STATE_IN_SOFT_RESET     0x3
774 #define IOA_STATE_IN_HARD_RESET     0x4
775 #define IOA_STATE_IN_RESET_ALERT    0x5
776 #define IOA_STATE_IN_BRINGDOWN      0x6
777 #define IOA_STATE_IN_BRINGUP        0x7
778 
779 	u32 ioa_reset_in_progress:1; /* true if IOA reset is in progress */
780 	u32 ioa_hard_reset:1;	/* TRUE if Hard Reset is needed */
781 	u32 ioa_unit_check:1;	/* Indicates Unit Check condition */
782 	u32 ioa_bringdown:1;	/* whether IOA needs to be brought down */
783 	u32 force_ioa_reset:1;  /* force adapter reset ? */
784 	u32 reinit_cfg_table:1; /* reinit config table due to lost CCN */
785 	u32 ioa_shutdown_type:2;/* shutdown type used during reset */
786 #define SHUTDOWN_NONE               0x0
787 #define SHUTDOWN_NORMAL             0x1
788 #define SHUTDOWN_ABBREV             0x2
789 	u32 timestamp_error:1; /* indicate set timestamp for out of sync */
790 
791 };
792 
793 /* LLD maintained resource entry structure */
794 struct pmcraid_resource_entry {
795 	struct list_head queue;	/* link to "to be exposed" resources */
796 	union {
797 		struct pmcraid_config_table_entry cfg_entry;
798 		struct pmcraid_config_table_entry_ext cfg_entry_ext;
799 	};
800 	struct scsi_device *scsi_dev;	/* Link scsi_device structure */
801 	atomic_t read_failures;		/* count of failed READ commands */
802 	atomic_t write_failures;	/* count of failed WRITE commands */
803 
804 	/* To indicate add/delete/modify during CCN */
805 	u8 change_detected;
806 #define RES_CHANGE_ADD          0x1	/* add this to mid-layer */
807 #define RES_CHANGE_DEL          0x2	/* remove this from mid-layer */
808 
809 	u8 reset_progress;      /* Device is resetting */
810 
811 	/*
812 	 * When IOA asks for sync (i.e. IOASC = Not Ready, Sync Required), this
813 	 * flag will be set, mid layer will be asked to retry. In the next
814 	 * attempt, this flag will be checked in queuecommand() to set
815 	 * SYNC_COMPLETE flag in IOARCB (flag_0).
816 	 */
817 	u8 sync_reqd;
818 
819 	/* target indicates the mapped target_id assigned to this resource if
820 	 * this is VSET resource. For non-VSET resources this will be un-used
821 	 * or zero
822 	 */
823 	u8 target;
824 };
825 
826 /* Data structures used in IOASC error code logging */
827 struct pmcraid_ioasc_error {
828 	u32 ioasc_code;		/* IOASC code */
829 	u8 log_level;		/* default log level assignment. */
830 	char *error_string;
831 };
832 
833 /* Initial log_level assignments for various IOASCs */
834 #define IOASC_LOG_LEVEL_NONE	    0x0 /* no logging */
835 #define IOASC_LOG_LEVEL_MUST        0x1	/* must log: all high-severity errors */
836 #define IOASC_LOG_LEVEL_HARD        0x2	/* optional – low severity errors */
837 
838 /* Error information maintained by LLD. LLD initializes the pmcraid_error_table
839  * statically.
840  */
841 static struct pmcraid_ioasc_error pmcraid_ioasc_error_table[] = {
842 	{0x01180600, IOASC_LOG_LEVEL_HARD,
843 	 "Recovered Error, soft media error, sector reassignment suggested"},
844 	{0x015D0000, IOASC_LOG_LEVEL_HARD,
845 	 "Recovered Error, failure prediction threshold exceeded"},
846 	{0x015D9200, IOASC_LOG_LEVEL_HARD,
847 	 "Recovered Error, soft Cache Card Battery error threshold"},
848 	{0x015D9200, IOASC_LOG_LEVEL_HARD,
849 	 "Recovered Error, soft Cache Card Battery error threshold"},
850 	{0x02048000, IOASC_LOG_LEVEL_HARD,
851 	 "Not Ready, IOA Reset Required"},
852 	{0x02408500, IOASC_LOG_LEVEL_HARD,
853 	 "Not Ready, IOA microcode download required"},
854 	{0x03110B00, IOASC_LOG_LEVEL_HARD,
855 	 "Medium Error, data unreadable, reassignment suggested"},
856 	{0x03110C00, IOASC_LOG_LEVEL_MUST,
857 	 "Medium Error, data unreadable do not reassign"},
858 	{0x03310000, IOASC_LOG_LEVEL_HARD,
859 	 "Medium Error, media corrupted"},
860 	{0x04050000, IOASC_LOG_LEVEL_HARD,
861 	 "Hardware Error, IOA can't communicate with device"},
862 	{0x04080000, IOASC_LOG_LEVEL_MUST,
863 	 "Hardware Error, device bus error"},
864 	{0x04088000, IOASC_LOG_LEVEL_MUST,
865 	 "Hardware Error, device bus is not functioning"},
866 	{0x04118000, IOASC_LOG_LEVEL_HARD,
867 	 "Hardware Error, IOA reserved area data check"},
868 	{0x04118100, IOASC_LOG_LEVEL_HARD,
869 	 "Hardware Error, IOA reserved area invalid data pattern"},
870 	{0x04118200, IOASC_LOG_LEVEL_HARD,
871 	 "Hardware Error, IOA reserved area LRC error"},
872 	{0x04320000, IOASC_LOG_LEVEL_HARD,
873 	 "Hardware Error, reassignment space exhausted"},
874 	{0x04330000, IOASC_LOG_LEVEL_HARD,
875 	 "Hardware Error, data transfer underlength error"},
876 	{0x04330000, IOASC_LOG_LEVEL_HARD,
877 	 "Hardware Error, data transfer overlength error"},
878 	{0x04418000, IOASC_LOG_LEVEL_MUST,
879 	 "Hardware Error, PCI bus error"},
880 	{0x04440000, IOASC_LOG_LEVEL_HARD,
881 	 "Hardware Error, device error"},
882 	{0x04448200, IOASC_LOG_LEVEL_MUST,
883 	 "Hardware Error, IOA error"},
884 	{0x04448300, IOASC_LOG_LEVEL_HARD,
885 	 "Hardware Error, undefined device response"},
886 	{0x04448400, IOASC_LOG_LEVEL_HARD,
887 	 "Hardware Error, IOA microcode error"},
888 	{0x04448600, IOASC_LOG_LEVEL_HARD,
889 	 "Hardware Error, IOA reset required"},
890 	{0x04449200, IOASC_LOG_LEVEL_HARD,
891 	 "Hardware Error, hard Cache Fearuee Card Battery error"},
892 	{0x0444A000, IOASC_LOG_LEVEL_HARD,
893 	 "Hardware Error, failed device altered"},
894 	{0x0444A200, IOASC_LOG_LEVEL_HARD,
895 	 "Hardware Error, data check after reassignment"},
896 	{0x0444A300, IOASC_LOG_LEVEL_HARD,
897 	 "Hardware Error, LRC error after reassignment"},
898 	{0x044A0000, IOASC_LOG_LEVEL_HARD,
899 	 "Hardware Error, device bus error (msg/cmd phase)"},
900 	{0x04670400, IOASC_LOG_LEVEL_HARD,
901 	 "Hardware Error, new device can't be used"},
902 	{0x04678000, IOASC_LOG_LEVEL_HARD,
903 	 "Hardware Error, invalid multiadapter configuration"},
904 	{0x04678100, IOASC_LOG_LEVEL_HARD,
905 	 "Hardware Error, incorrect connection between enclosures"},
906 	{0x04678200, IOASC_LOG_LEVEL_HARD,
907 	 "Hardware Error, connections exceed IOA design limits"},
908 	{0x04678300, IOASC_LOG_LEVEL_HARD,
909 	 "Hardware Error, incorrect multipath connection"},
910 	{0x04679000, IOASC_LOG_LEVEL_HARD,
911 	 "Hardware Error, command to LUN failed"},
912 	{0x064C8000, IOASC_LOG_LEVEL_HARD,
913 	 "Unit Attention, cache exists for missing/failed device"},
914 	{0x06670100, IOASC_LOG_LEVEL_HARD,
915 	 "Unit Attention, incompatible exposed mode device"},
916 	{0x06670600, IOASC_LOG_LEVEL_HARD,
917 	 "Unit Attention, attachment of logical unit failed"},
918 	{0x06678000, IOASC_LOG_LEVEL_HARD,
919 	 "Unit Attention, cables exceed connective design limit"},
920 	{0x06678300, IOASC_LOG_LEVEL_HARD,
921 	 "Unit Attention, incomplete multipath connection between" \
922 	 "IOA and enclosure"},
923 	{0x06678400, IOASC_LOG_LEVEL_HARD,
924 	 "Unit Attention, incomplete multipath connection between" \
925 	 "device and enclosure"},
926 	{0x06678500, IOASC_LOG_LEVEL_HARD,
927 	 "Unit Attention, incomplete multipath connection between" \
928 	 "IOA and remote IOA"},
929 	{0x06678600, IOASC_LOG_LEVEL_HARD,
930 	 "Unit Attention, missing remote IOA"},
931 	{0x06679100, IOASC_LOG_LEVEL_HARD,
932 	 "Unit Attention, enclosure doesn't support required multipath" \
933 	 "function"},
934 	{0x06698200, IOASC_LOG_LEVEL_HARD,
935 	 "Unit Attention, corrupt array parity detected on device"},
936 	{0x066B0200, IOASC_LOG_LEVEL_HARD,
937 	 "Unit Attention, array exposed"},
938 	{0x066B8200, IOASC_LOG_LEVEL_HARD,
939 	 "Unit Attention, exposed array is still protected"},
940 	{0x066B9200, IOASC_LOG_LEVEL_HARD,
941 	 "Unit Attention, Multipath redundancy level got worse"},
942 	{0x07270000, IOASC_LOG_LEVEL_HARD,
943 	 "Data Protect, device is read/write protected by IOA"},
944 	{0x07278000, IOASC_LOG_LEVEL_HARD,
945 	 "Data Protect, IOA doesn't support device attribute"},
946 	{0x07278100, IOASC_LOG_LEVEL_HARD,
947 	 "Data Protect, NVRAM mirroring prohibited"},
948 	{0x07278400, IOASC_LOG_LEVEL_HARD,
949 	 "Data Protect, array is short 2 or more devices"},
950 	{0x07278600, IOASC_LOG_LEVEL_HARD,
951 	 "Data Protect, exposed array is short a required device"},
952 	{0x07278700, IOASC_LOG_LEVEL_HARD,
953 	 "Data Protect, array members not at required addresses"},
954 	{0x07278800, IOASC_LOG_LEVEL_HARD,
955 	 "Data Protect, exposed mode device resource address conflict"},
956 	{0x07278900, IOASC_LOG_LEVEL_HARD,
957 	 "Data Protect, incorrect resource address of exposed mode device"},
958 	{0x07278A00, IOASC_LOG_LEVEL_HARD,
959 	 "Data Protect, Array is missing a device and parity is out of sync"},
960 	{0x07278B00, IOASC_LOG_LEVEL_HARD,
961 	 "Data Protect, maximum number of arrays already exist"},
962 	{0x07278C00, IOASC_LOG_LEVEL_HARD,
963 	 "Data Protect, cannot locate cache data for device"},
964 	{0x07278D00, IOASC_LOG_LEVEL_HARD,
965 	 "Data Protect, cache data exits for a changed device"},
966 	{0x07279100, IOASC_LOG_LEVEL_HARD,
967 	 "Data Protect, detection of a device requiring format"},
968 	{0x07279200, IOASC_LOG_LEVEL_HARD,
969 	 "Data Protect, IOA exceeds maximum number of devices"},
970 	{0x07279600, IOASC_LOG_LEVEL_HARD,
971 	 "Data Protect, missing array, volume set is not functional"},
972 	{0x07279700, IOASC_LOG_LEVEL_HARD,
973 	 "Data Protect, single device for a volume set"},
974 	{0x07279800, IOASC_LOG_LEVEL_HARD,
975 	 "Data Protect, missing multiple devices for a volume set"},
976 	{0x07279900, IOASC_LOG_LEVEL_HARD,
977 	 "Data Protect, maximum number of volument sets already exists"},
978 	{0x07279A00, IOASC_LOG_LEVEL_HARD,
979 	 "Data Protect, other volume set problem"},
980 };
981 
982 /* macros to help in debugging */
983 #define pmcraid_err(...)  \
984 	printk(KERN_ERR "MaxRAID: "__VA_ARGS__)
985 
986 #define pmcraid_info(...) \
987 	if (pmcraid_debug_log) \
988 		printk(KERN_INFO "MaxRAID: "__VA_ARGS__)
989 
990 /* check if given command is a SCSI READ or SCSI WRITE command */
991 #define SCSI_READ_CMD           0x1	/* any of SCSI READ commands */
992 #define SCSI_WRITE_CMD          0x2	/* any of SCSI WRITE commands */
993 #define SCSI_CMD_TYPE(opcode) \
994 ({  u8 op = opcode; u8 __type = 0;\
995 	if (op == READ_6 || op == READ_10 || op == READ_12 || op == READ_16)\
996 		__type = SCSI_READ_CMD;\
997 	else if (op == WRITE_6 || op == WRITE_10 || op == WRITE_12 || \
998 		 op == WRITE_16)\
999 		__type = SCSI_WRITE_CMD;\
1000 	__type;\
1001 })
1002 
1003 #define IS_SCSI_READ_WRITE(opcode) \
1004 ({	u8 __type = SCSI_CMD_TYPE(opcode); \
1005 	(__type == SCSI_READ_CMD || __type == SCSI_WRITE_CMD) ? 1 : 0;\
1006 })
1007 
1008 
1009 /*
1010  * pmcraid_ioctl_header - definition of header structure that precedes all the
1011  * buffers given as ioctl arguments.
1012  *
1013  * .signature           : always ASCII string, "PMCRAID"
1014  * .reserved            : not used
1015  * .buffer_length       : length of the buffer following the header
1016  */
1017 struct pmcraid_ioctl_header {
1018 	u8  signature[8];
1019 	u32 reserved;
1020 	u32 buffer_length;
1021 };
1022 
1023 #define PMCRAID_IOCTL_SIGNATURE      "PMCRAID"
1024 
1025 /*
1026  * keys to differentiate between driver handled IOCTLs and passthrough
1027  * IOCTLs passed to IOA. driver determines the ioctl type using macro
1028  * _IOC_TYPE
1029  */
1030 #define PMCRAID_DRIVER_IOCTL         'D'
1031 
1032 #define DRV_IOCTL(n, size) \
1033 	_IOC(_IOC_READ|_IOC_WRITE, PMCRAID_DRIVER_IOCTL, (n), (size))
1034 
1035 /*
1036  * _ARGSIZE: macro that gives size of the argument type passed to an IOCTL cmd.
1037  * This is to facilitate applications avoiding un-necessary memory allocations.
1038  * For example, most of driver handled ioctls do not require ioarcb, ioasa.
1039  */
1040 #define _ARGSIZE(arg) (sizeof(struct pmcraid_ioctl_header) + sizeof(arg))
1041 
1042 /* Driver handled IOCTL command definitions */
1043 
1044 #define PMCRAID_IOCTL_RESET_ADAPTER          \
1045 	DRV_IOCTL(5, sizeof(struct pmcraid_ioctl_header))
1046 
1047 #endif /* _PMCRAID_H */
1048