xref: /openbmc/linux/drivers/scsi/dc395x.c (revision 22246614)
1 /*
2  * dc395x.c
3  *
4  * Device Driver for Tekram DC395(U/UW/F), DC315(U)
5  * PCI SCSI Bus Master Host Adapter
6  * (SCSI chip set used Tekram ASIC TRM-S1040)
7  *
8  * Authors:
9  *  C.L. Huang <ching@tekram.com.tw>
10  *  Erich Chen <erich@tekram.com.tw>
11  *  (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
12  *
13  *  Kurt Garloff <garloff@suse.de>
14  *  (C) 1999-2000 Kurt Garloff
15  *
16  *  Oliver Neukum <oliver@neukum.name>
17  *  Ali Akcaagac <aliakc@web.de>
18  *  Jamie Lenehan <lenehan@twibble.org>
19  *  (C) 2003
20  *
21  * License: GNU GPL
22  *
23  *************************************************************************
24  *
25  * Redistribution and use in source and binary forms, with or without
26  * modification, are permitted provided that the following conditions
27  * are met:
28  * 1. Redistributions of source code must retain the above copyright
29  *    notice, this list of conditions and the following disclaimer.
30  * 2. Redistributions in binary form must reproduce the above copyright
31  *    notice, this list of conditions and the following disclaimer in the
32  *    documentation and/or other materials provided with the distribution.
33  * 3. The name of the author may not be used to endorse or promote products
34  *    derived from this software without specific prior written permission.
35  *
36  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
37  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
39  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
40  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
45  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46  *
47  ************************************************************************
48  */
49 #include <linux/module.h>
50 #include <linux/moduleparam.h>
51 #include <linux/delay.h>
52 #include <linux/ctype.h>
53 #include <linux/blkdev.h>
54 #include <linux/interrupt.h>
55 #include <linux/init.h>
56 #include <linux/spinlock.h>
57 #include <linux/pci.h>
58 #include <linux/list.h>
59 #include <linux/vmalloc.h>
60 #include <asm/io.h>
61 
62 #include <scsi/scsi.h>
63 #include <scsi/scsicam.h>	/* needed for scsicam_bios_param */
64 #include <scsi/scsi_cmnd.h>
65 #include <scsi/scsi_device.h>
66 #include <scsi/scsi_host.h>
67 
68 #include "dc395x.h"
69 
70 #define DC395X_NAME	"dc395x"
71 #define DC395X_BANNER	"Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
72 #define DC395X_VERSION	"v2.05, 2004/03/08"
73 
74 /*---------------------------------------------------------------------------
75                                   Features
76  ---------------------------------------------------------------------------*/
77 /*
78  * Set to disable parts of the driver
79  */
80 /*#define DC395x_NO_DISCONNECT*/
81 /*#define DC395x_NO_TAGQ*/
82 /*#define DC395x_NO_SYNC*/
83 /*#define DC395x_NO_WIDE*/
84 
85 /*---------------------------------------------------------------------------
86                                   Debugging
87  ---------------------------------------------------------------------------*/
88 /*
89  * Types of debugging that can be enabled and disabled
90  */
91 #define DBG_KG		0x0001
92 #define DBG_0		0x0002
93 #define DBG_1		0x0004
94 #define DBG_SG		0x0020
95 #define DBG_FIFO	0x0040
96 #define DBG_PIO		0x0080
97 
98 
99 /*
100  * Set set of things to output debugging for.
101  * Undefine to remove all debugging
102  */
103 /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
104 /*#define  DEBUG_MASK	DBG_0*/
105 
106 
107 /*
108  * Output a kernel mesage at the specified level and append the
109  * driver name and a ": " to the start of the message
110  */
111 #define dprintkl(level, format, arg...)  \
112     printk(level DC395X_NAME ": " format , ## arg)
113 
114 
115 #ifdef DEBUG_MASK
116 /*
117  * print a debug message - this is formated with KERN_DEBUG, then the
118  * driver name followed by a ": " and then the message is output.
119  * This also checks that the specified debug level is enabled before
120  * outputing the message
121  */
122 #define dprintkdbg(type, format, arg...) \
123 	do { \
124 		if ((type) & (DEBUG_MASK)) \
125 			dprintkl(KERN_DEBUG , format , ## arg); \
126 	} while (0)
127 
128 /*
129  * Check if the specified type of debugging is enabled
130  */
131 #define debug_enabled(type)	((DEBUG_MASK) & (type))
132 
133 #else
134 /*
135  * No debugging. Do nothing
136  */
137 #define dprintkdbg(type, format, arg...) \
138 	do {} while (0)
139 #define debug_enabled(type)	(0)
140 
141 #endif
142 
143 
144 #ifndef PCI_VENDOR_ID_TEKRAM
145 #define PCI_VENDOR_ID_TEKRAM                    0x1DE1	/* Vendor ID    */
146 #endif
147 #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
148 #define PCI_DEVICE_ID_TEKRAM_TRMS1040           0x0391	/* Device ID    */
149 #endif
150 
151 
152 #define DC395x_LOCK_IO(dev,flags)		spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
153 #define DC395x_UNLOCK_IO(dev,flags)		spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
154 
155 #define DC395x_read8(acb,address)		(u8)(inb(acb->io_port_base + (address)))
156 #define DC395x_read16(acb,address)		(u16)(inw(acb->io_port_base + (address)))
157 #define DC395x_read32(acb,address)		(u32)(inl(acb->io_port_base + (address)))
158 #define DC395x_write8(acb,address,value)	outb((value), acb->io_port_base + (address))
159 #define DC395x_write16(acb,address,value)	outw((value), acb->io_port_base + (address))
160 #define DC395x_write32(acb,address,value)	outl((value), acb->io_port_base + (address))
161 
162 /* cmd->result */
163 #define RES_TARGET		0x000000FF	/* Target State */
164 #define RES_TARGET_LNX  STATUS_MASK	/* Only official ... */
165 #define RES_ENDMSG		0x0000FF00	/* End Message */
166 #define RES_DID			0x00FF0000	/* DID_ codes */
167 #define RES_DRV			0xFF000000	/* DRIVER_ codes */
168 
169 #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
170 #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
171 
172 #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
173 #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
174 #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
175 #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
176 #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
177 
178 #define TAG_NONE 255
179 
180 /*
181  * srb->segement_x is the hw sg list. It is always allocated as a
182  * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
183  * cross a page boundy.
184  */
185 #define SEGMENTX_LEN	(sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
186 
187 
188 struct SGentry {
189 	u32 address;		/* bus! address */
190 	u32 length;
191 };
192 
193 /* The SEEPROM structure for TRM_S1040 */
194 struct NVRamTarget {
195 	u8 cfg0;		/* Target configuration byte 0  */
196 	u8 period;		/* Target period                */
197 	u8 cfg2;		/* Target configuration byte 2  */
198 	u8 cfg3;		/* Target configuration byte 3  */
199 };
200 
201 struct NvRamType {
202 	u8 sub_vendor_id[2];	/* 0,1  Sub Vendor ID   */
203 	u8 sub_sys_id[2];	/* 2,3  Sub System ID   */
204 	u8 sub_class;		/* 4    Sub Class       */
205 	u8 vendor_id[2];	/* 5,6  Vendor ID       */
206 	u8 device_id[2];	/* 7,8  Device ID       */
207 	u8 reserved;		/* 9    Reserved        */
208 	struct NVRamTarget target[DC395x_MAX_SCSI_ID];
209 						/** 10,11,12,13
210 						 ** 14,15,16,17
211 						 ** ....
212 						 ** ....
213 						 ** 70,71,72,73
214 						 */
215 	u8 scsi_id;		/* 74 Host Adapter SCSI ID      */
216 	u8 channel_cfg;		/* 75 Channel configuration     */
217 	u8 delay_time;		/* 76 Power on delay time       */
218 	u8 max_tag;		/* 77 Maximum tags              */
219 	u8 reserved0;		/* 78  */
220 	u8 boot_target;		/* 79  */
221 	u8 boot_lun;		/* 80  */
222 	u8 reserved1;		/* 81  */
223 	u16 reserved2[22];	/* 82,..125 */
224 	u16 cksum;		/* 126,127 */
225 };
226 
227 struct ScsiReqBlk {
228 	struct list_head list;		/* next/prev ptrs for srb lists */
229 	struct DeviceCtlBlk *dcb;
230 	struct scsi_cmnd *cmd;
231 
232 	struct SGentry *segment_x;	/* Linear array of hw sg entries (up to 64 entries) */
233 	dma_addr_t sg_bus_addr;	        /* Bus address of sg list (ie, of segment_x) */
234 
235 	u8 sg_count;			/* No of HW sg entries for this request */
236 	u8 sg_index;			/* Index of HW sg entry for this request */
237 	size_t total_xfer_length;	/* Total number of bytes remaining to be transfered */
238 	size_t request_length;		/* Total number of bytes in this request */
239 	/*
240 	 * The sense buffer handling function, request_sense, uses
241 	 * the first hw sg entry (segment_x[0]) and the transfer
242 	 * length (total_xfer_length). While doing this it stores the
243 	 * original values into the last sg hw list
244 	 * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
245 	 * total_xfer_length in xferred. These values are restored in
246 	 * pci_unmap_srb_sense. This is the only place xferred is used.
247 	 */
248 	size_t xferred;		        /* Saved copy of total_xfer_length */
249 
250 	u16 state;
251 
252 	u8 msgin_buf[6];
253 	u8 msgout_buf[6];
254 
255 	u8 adapter_status;
256 	u8 target_status;
257 	u8 msg_count;
258 	u8 end_message;
259 
260 	u8 tag_number;
261 	u8 status;
262 	u8 retry_count;
263 	u8 flag;
264 
265 	u8 scsi_phase;
266 };
267 
268 struct DeviceCtlBlk {
269 	struct list_head list;		/* next/prev ptrs for the dcb list */
270 	struct AdapterCtlBlk *acb;
271 	struct list_head srb_going_list;	/* head of going srb list */
272 	struct list_head srb_waiting_list;	/* head of waiting srb list */
273 
274 	struct ScsiReqBlk *active_srb;
275 	u32 tag_mask;
276 
277 	u16 max_command;
278 
279 	u8 target_id;		/* SCSI Target ID  (SCSI Only) */
280 	u8 target_lun;		/* SCSI Log.  Unit (SCSI Only) */
281 	u8 identify_msg;
282 	u8 dev_mode;
283 
284 	u8 inquiry7;		/* To store Inquiry flags */
285 	u8 sync_mode;		/* 0:async mode */
286 	u8 min_nego_period;	/* for nego. */
287 	u8 sync_period;		/* for reg.  */
288 
289 	u8 sync_offset;		/* for reg. and nego.(low nibble) */
290 	u8 flag;
291 	u8 dev_type;
292 	u8 init_tcq_flag;
293 };
294 
295 struct AdapterCtlBlk {
296 	struct Scsi_Host *scsi_host;
297 
298 	unsigned long io_port_base;
299 	unsigned long io_port_len;
300 
301 	struct list_head dcb_list;		/* head of going dcb list */
302 	struct DeviceCtlBlk *dcb_run_robin;
303 	struct DeviceCtlBlk *active_dcb;
304 
305 	struct list_head srb_free_list;		/* head of free srb list */
306 	struct ScsiReqBlk *tmp_srb;
307 	struct timer_list waiting_timer;
308 	struct timer_list selto_timer;
309 
310 	u16 srb_count;
311 
312 	u8 sel_timeout;
313 
314 	unsigned int irq_level;
315 	u8 tag_max_num;
316 	u8 acb_flag;
317 	u8 gmode2;
318 
319 	u8 config;
320 	u8 lun_chk;
321 	u8 scan_devices;
322 	u8 hostid_bit;
323 
324 	u8 dcb_map[DC395x_MAX_SCSI_ID];
325 	struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
326 
327 	struct pci_dev *dev;
328 
329 	u8 msg_len;
330 
331 	struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
332 	struct ScsiReqBlk srb;
333 
334 	struct NvRamType eeprom;	/* eeprom settings for this adapter */
335 };
336 
337 
338 /*---------------------------------------------------------------------------
339                             Forward declarations
340  ---------------------------------------------------------------------------*/
341 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
342 		u16 *pscsi_status);
343 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
344 		u16 *pscsi_status);
345 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
346 		u16 *pscsi_status);
347 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
348 		u16 *pscsi_status);
349 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
350 		u16 *pscsi_status);
351 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
352 		u16 *pscsi_status);
353 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
354 		u16 *pscsi_status);
355 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
356 		u16 *pscsi_status);
357 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
358 		u16 *pscsi_status);
359 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
360 		u16 *pscsi_status);
361 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
362 		u16 *pscsi_status);
363 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
364 		u16 *pscsi_status);
365 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
366 		u16 *pscsi_status);
367 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
368 		u16 *pscsi_status);
369 static void set_basic_config(struct AdapterCtlBlk *acb);
370 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
371 		struct ScsiReqBlk *srb);
372 static void reset_scsi_bus(struct AdapterCtlBlk *acb);
373 static void data_io_transfer(struct AdapterCtlBlk *acb,
374 		struct ScsiReqBlk *srb, u16 io_dir);
375 static void disconnect(struct AdapterCtlBlk *acb);
376 static void reselect(struct AdapterCtlBlk *acb);
377 static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
378 		struct ScsiReqBlk *srb);
379 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
380 		struct ScsiReqBlk *srb);
381 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
382 		struct ScsiReqBlk *srb);
383 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
384 		struct scsi_cmnd *cmd, u8 force);
385 static void scsi_reset_detect(struct AdapterCtlBlk *acb);
386 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
387 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
388 		struct ScsiReqBlk *srb);
389 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
390 		struct ScsiReqBlk *srb);
391 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
392 		struct ScsiReqBlk *srb);
393 static void set_xfer_rate(struct AdapterCtlBlk *acb,
394 		struct DeviceCtlBlk *dcb);
395 static void waiting_timeout(unsigned long ptr);
396 
397 
398 /*---------------------------------------------------------------------------
399                                  Static Data
400  ---------------------------------------------------------------------------*/
401 static u16 current_sync_offset = 0;
402 
403 static void *dc395x_scsi_phase0[] = {
404 	data_out_phase0,/* phase:0 */
405 	data_in_phase0,	/* phase:1 */
406 	command_phase0,	/* phase:2 */
407 	status_phase0,	/* phase:3 */
408 	nop0,		/* phase:4 PH_BUS_FREE .. initial phase */
409 	nop0,		/* phase:5 PH_BUS_FREE .. initial phase */
410 	msgout_phase0,	/* phase:6 */
411 	msgin_phase0,	/* phase:7 */
412 };
413 
414 static void *dc395x_scsi_phase1[] = {
415 	data_out_phase1,/* phase:0 */
416 	data_in_phase1,	/* phase:1 */
417 	command_phase1,	/* phase:2 */
418 	status_phase1,	/* phase:3 */
419 	nop1,		/* phase:4 PH_BUS_FREE .. initial phase */
420 	nop1,		/* phase:5 PH_BUS_FREE .. initial phase */
421 	msgout_phase1,	/* phase:6 */
422 	msgin_phase1,	/* phase:7 */
423 };
424 
425 /*
426  *Fast20:	000	 50ns, 20.0 MHz
427  *		001	 75ns, 13.3 MHz
428  *		010	100ns, 10.0 MHz
429  *		011	125ns,  8.0 MHz
430  *		100	150ns,  6.6 MHz
431  *		101	175ns,  5.7 MHz
432  *		110	200ns,  5.0 MHz
433  *		111	250ns,  4.0 MHz
434  *
435  *Fast40(LVDS):	000	 25ns, 40.0 MHz
436  *		001	 50ns, 20.0 MHz
437  *		010	 75ns, 13.3 MHz
438  *		011	100ns, 10.0 MHz
439  *		100	125ns,  8.0 MHz
440  *		101	150ns,  6.6 MHz
441  *		110	175ns,  5.7 MHz
442  *		111	200ns,  5.0 MHz
443  */
444 /*static u8	clock_period[] = {12,19,25,31,37,44,50,62};*/
445 
446 /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
447 static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
448 static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
449 
450 
451 /*---------------------------------------------------------------------------
452                                 Configuration
453   ---------------------------------------------------------------------------*/
454 /*
455  * Module/boot parameters currently effect *all* instances of the
456  * card in the system.
457  */
458 
459 /*
460  * Command line parameters are stored in a structure below.
461  * These are the index's into the structure for the various
462  * command line options.
463  */
464 #define CFG_ADAPTER_ID		0
465 #define CFG_MAX_SPEED		1
466 #define CFG_DEV_MODE		2
467 #define CFG_ADAPTER_MODE	3
468 #define CFG_TAGS		4
469 #define CFG_RESET_DELAY		5
470 
471 #define CFG_NUM			6	/* number of configuration items */
472 
473 
474 /*
475  * Value used to indicate that a command line override
476  * hasn't been used to modify the value.
477  */
478 #define CFG_PARAM_UNSET -1
479 
480 
481 /*
482  * Hold command line parameters.
483  */
484 struct ParameterData {
485 	int value;		/* value of this setting */
486 	int min;		/* minimum value */
487 	int max;		/* maximum value */
488 	int def;		/* default value */
489 	int safe;		/* safe value */
490 };
491 static struct ParameterData __devinitdata cfg_data[] = {
492 	{ /* adapter id */
493 		CFG_PARAM_UNSET,
494 		0,
495 		15,
496 		7,
497 		7
498 	},
499 	{ /* max speed */
500 		CFG_PARAM_UNSET,
501 		  0,
502 		  7,
503 		  1,	/* 13.3Mhz */
504 		  4,	/*  6.7Hmz */
505 	},
506 	{ /* dev mode */
507 		CFG_PARAM_UNSET,
508 		0,
509 		0x3f,
510 		NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
511 			NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
512 			NTC_DO_SEND_START,
513 		NTC_DO_PARITY_CHK | NTC_DO_SEND_START
514 	},
515 	{ /* adapter mode */
516 		CFG_PARAM_UNSET,
517 		0,
518 		0x2f,
519 #ifdef CONFIG_SCSI_MULTI_LUN
520 			NAC_SCANLUN |
521 #endif
522 		NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
523 			/*| NAC_ACTIVE_NEG*/,
524 		NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
525 	},
526 	{ /* tags */
527 		CFG_PARAM_UNSET,
528 		0,
529 		5,
530 		3,	/* 16 tags (??) */
531 		2,
532 	},
533 	{ /* reset delay */
534 		CFG_PARAM_UNSET,
535 		0,
536 		180,
537 		1,	/* 1 second */
538 		10,	/* 10 seconds */
539 	}
540 };
541 
542 
543 /*
544  * Safe settings. If set to zero the BIOS/default values with
545  * command line overrides will be used. If set to 1 then safe and
546  * slow settings will be used.
547  */
548 static int use_safe_settings = 0;
549 module_param_named(safe, use_safe_settings, bool, 0);
550 MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
551 
552 
553 module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
554 MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
555 
556 module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
557 MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
558 
559 module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
560 MODULE_PARM_DESC(dev_mode, "Device mode.");
561 
562 module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
563 MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
564 
565 module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
566 MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
567 
568 module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
569 MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
570 
571 
572 /**
573  * set_safe_settings - if the use_safe_settings option is set then
574  * set all values to the safe and slow values.
575  **/
576 static void __devinit set_safe_settings(void)
577 {
578 	if (use_safe_settings)
579 	{
580 		int i;
581 
582 		dprintkl(KERN_INFO, "Using safe settings.\n");
583 		for (i = 0; i < CFG_NUM; i++)
584 		{
585 			cfg_data[i].value = cfg_data[i].safe;
586 		}
587 	}
588 }
589 
590 
591 /**
592  * fix_settings - reset any boot parameters which are out of range
593  * back to the default values.
594  **/
595 static void __devinit fix_settings(void)
596 {
597 	int i;
598 
599 	dprintkdbg(DBG_1,
600 		"setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
601 		"AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
602 		cfg_data[CFG_ADAPTER_ID].value,
603 		cfg_data[CFG_MAX_SPEED].value,
604 		cfg_data[CFG_DEV_MODE].value,
605 		cfg_data[CFG_ADAPTER_MODE].value,
606 		cfg_data[CFG_TAGS].value,
607 		cfg_data[CFG_RESET_DELAY].value);
608 	for (i = 0; i < CFG_NUM; i++)
609 	{
610 		if (cfg_data[i].value < cfg_data[i].min
611 		    || cfg_data[i].value > cfg_data[i].max)
612 			cfg_data[i].value = cfg_data[i].def;
613 	}
614 }
615 
616 
617 
618 /*
619  * Mapping from the eeprom delay index value (index into this array)
620  * to the number of actual seconds that the delay should be for.
621  */
622 static char __devinitdata eeprom_index_to_delay_map[] =
623 	{ 1, 3, 5, 10, 16, 30, 60, 120 };
624 
625 
626 /**
627  * eeprom_index_to_delay - Take the eeprom delay setting and convert it
628  * into a number of seconds.
629  *
630  * @eeprom: The eeprom structure in which we find the delay index to map.
631  **/
632 static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom)
633 {
634 	eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
635 }
636 
637 
638 /**
639  * delay_to_eeprom_index - Take a delay in seconds and return the
640  * closest eeprom index which will delay for at least that amount of
641  * seconds.
642  *
643  * @delay: The delay, in seconds, to find the eeprom index for.
644  **/
645 static int __devinit delay_to_eeprom_index(int delay)
646 {
647 	u8 idx = 0;
648 	while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
649 		idx++;
650 	return idx;
651 }
652 
653 
654 /**
655  * eeprom_override - Override the eeprom settings, in the provided
656  * eeprom structure, with values that have been set on the command
657  * line.
658  *
659  * @eeprom: The eeprom data to override with command line options.
660  **/
661 static void __devinit eeprom_override(struct NvRamType *eeprom)
662 {
663 	u8 id;
664 
665 	/* Adapter Settings */
666 	if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
667 		eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
668 
669 	if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
670 		eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
671 
672 	if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
673 		eeprom->delay_time = delay_to_eeprom_index(
674 					cfg_data[CFG_RESET_DELAY].value);
675 
676 	if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
677 		eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
678 
679 	/* Device Settings */
680 	for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
681 		if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
682 			eeprom->target[id].cfg0 =
683 				(u8)cfg_data[CFG_DEV_MODE].value;
684 
685 		if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
686 			eeprom->target[id].period =
687 				(u8)cfg_data[CFG_MAX_SPEED].value;
688 
689 	}
690 }
691 
692 
693 /*---------------------------------------------------------------------------
694  ---------------------------------------------------------------------------*/
695 
696 static unsigned int list_size(struct list_head *head)
697 {
698 	unsigned int count = 0;
699 	struct list_head *pos;
700 	list_for_each(pos, head)
701 		count++;
702 	return count;
703 }
704 
705 
706 static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
707 		struct DeviceCtlBlk *pos)
708 {
709 	int use_next = 0;
710 	struct DeviceCtlBlk* next = NULL;
711 	struct DeviceCtlBlk* i;
712 
713 	if (list_empty(head))
714 		return NULL;
715 
716 	/* find supplied dcb and then select the next one */
717 	list_for_each_entry(i, head, list)
718 		if (use_next) {
719 			next = i;
720 			break;
721 		} else if (i == pos) {
722 			use_next = 1;
723 		}
724 	/* if no next one take the head one (ie, wraparound) */
725 	if (!next)
726         	list_for_each_entry(i, head, list) {
727         		next = i;
728         		break;
729         	}
730 
731 	return next;
732 }
733 
734 
735 static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
736 {
737 	if (srb->tag_number < 255) {
738 		dcb->tag_mask &= ~(1 << srb->tag_number);	/* free tag mask */
739 		srb->tag_number = 255;
740 	}
741 }
742 
743 
744 /* Find cmd in SRB list */
745 static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
746 		struct list_head *head)
747 {
748 	struct ScsiReqBlk *i;
749 	list_for_each_entry(i, head, list)
750 		if (i->cmd == cmd)
751 			return i;
752 	return NULL;
753 }
754 
755 
756 static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
757 {
758 	struct list_head *head = &acb->srb_free_list;
759 	struct ScsiReqBlk *srb = NULL;
760 
761 	if (!list_empty(head)) {
762 		srb = list_entry(head->next, struct ScsiReqBlk, list);
763 		list_del(head->next);
764 		dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
765 	}
766 	return srb;
767 }
768 
769 
770 static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
771 {
772 	dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
773 	list_add_tail(&srb->list, &acb->srb_free_list);
774 }
775 
776 
777 static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
778 		struct ScsiReqBlk *srb)
779 {
780 	dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n",
781 		srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
782 	list_add(&srb->list, &dcb->srb_waiting_list);
783 }
784 
785 
786 static void srb_waiting_append(struct DeviceCtlBlk *dcb,
787 		struct ScsiReqBlk *srb)
788 {
789 	dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n",
790 		 srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
791 	list_add_tail(&srb->list, &dcb->srb_waiting_list);
792 }
793 
794 
795 static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
796 {
797 	dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n",
798 		srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
799 	list_add_tail(&srb->list, &dcb->srb_going_list);
800 }
801 
802 
803 static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
804 {
805 	struct ScsiReqBlk *i;
806 	struct ScsiReqBlk *tmp;
807 	dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n",
808 		srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
809 
810 	list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
811 		if (i == srb) {
812 			list_del(&srb->list);
813 			break;
814 		}
815 }
816 
817 
818 static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
819 		struct ScsiReqBlk *srb)
820 {
821 	struct ScsiReqBlk *i;
822 	struct ScsiReqBlk *tmp;
823 	dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n",
824 		srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
825 
826 	list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
827 		if (i == srb) {
828 			list_del(&srb->list);
829 			break;
830 		}
831 }
832 
833 
834 static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
835 		struct ScsiReqBlk *srb)
836 {
837 	dprintkdbg(DBG_0,
838 		"srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n",
839 		srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
840 	list_move(&srb->list, &dcb->srb_waiting_list);
841 }
842 
843 
844 static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
845 		struct ScsiReqBlk *srb)
846 {
847 	dprintkdbg(DBG_0,
848 		"srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n",
849 		srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
850 	list_move(&srb->list, &dcb->srb_going_list);
851 }
852 
853 
854 /* Sets the timer to wake us up */
855 static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
856 {
857 	if (timer_pending(&acb->waiting_timer))
858 		return;
859 	init_timer(&acb->waiting_timer);
860 	acb->waiting_timer.function = waiting_timeout;
861 	acb->waiting_timer.data = (unsigned long) acb;
862 	if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2))
863 		acb->waiting_timer.expires =
864 		    acb->scsi_host->last_reset - HZ / 2 + 1;
865 	else
866 		acb->waiting_timer.expires = jiffies + to + 1;
867 	add_timer(&acb->waiting_timer);
868 }
869 
870 
871 /* Send the next command from the waiting list to the bus */
872 static void waiting_process_next(struct AdapterCtlBlk *acb)
873 {
874 	struct DeviceCtlBlk *start = NULL;
875 	struct DeviceCtlBlk *pos;
876 	struct DeviceCtlBlk *dcb;
877 	struct ScsiReqBlk *srb;
878 	struct list_head *dcb_list_head = &acb->dcb_list;
879 
880 	if (acb->active_dcb
881 	    || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
882 		return;
883 
884 	if (timer_pending(&acb->waiting_timer))
885 		del_timer(&acb->waiting_timer);
886 
887 	if (list_empty(dcb_list_head))
888 		return;
889 
890 	/*
891 	 * Find the starting dcb. Need to find it again in the list
892 	 * since the list may have changed since we set the ptr to it
893 	 */
894 	list_for_each_entry(dcb, dcb_list_head, list)
895 		if (dcb == acb->dcb_run_robin) {
896 			start = dcb;
897 			break;
898 		}
899 	if (!start) {
900 		/* This can happen! */
901 		start = list_entry(dcb_list_head->next, typeof(*start), list);
902 		acb->dcb_run_robin = start;
903 	}
904 
905 
906 	/*
907 	 * Loop over the dcb, but we start somewhere (potentially) in
908 	 * the middle of the loop so we need to manully do this.
909 	 */
910 	pos = start;
911 	do {
912 		struct list_head *waiting_list_head = &pos->srb_waiting_list;
913 
914 		/* Make sure, the next another device gets scheduled ... */
915 		acb->dcb_run_robin = dcb_get_next(dcb_list_head,
916 						  acb->dcb_run_robin);
917 
918 		if (list_empty(waiting_list_head) ||
919 		    pos->max_command <= list_size(&pos->srb_going_list)) {
920 			/* move to next dcb */
921 			pos = dcb_get_next(dcb_list_head, pos);
922 		} else {
923 			srb = list_entry(waiting_list_head->next,
924 					 struct ScsiReqBlk, list);
925 
926 			/* Try to send to the bus */
927 			if (!start_scsi(acb, pos, srb))
928 				srb_waiting_to_going_move(pos, srb);
929 			else
930 				waiting_set_timer(acb, HZ/50);
931 			break;
932 		}
933 	} while (pos != start);
934 }
935 
936 
937 /* Wake up waiting queue */
938 static void waiting_timeout(unsigned long ptr)
939 {
940 	unsigned long flags;
941 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
942 	dprintkdbg(DBG_1,
943 		"waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
944 	DC395x_LOCK_IO(acb->scsi_host, flags);
945 	waiting_process_next(acb);
946 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
947 }
948 
949 
950 /* Get the DCB for a given ID/LUN combination */
951 static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
952 {
953 	return acb->children[id][lun];
954 }
955 
956 
957 /* Send SCSI Request Block (srb) to adapter (acb) */
958 static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
959 {
960 	struct DeviceCtlBlk *dcb = srb->dcb;
961 
962 	if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
963 	    acb->active_dcb ||
964 	    (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
965 		srb_waiting_append(dcb, srb);
966 		waiting_process_next(acb);
967 		return;
968 	}
969 
970 	if (!start_scsi(acb, dcb, srb))
971 		srb_going_append(dcb, srb);
972 	else {
973 		srb_waiting_insert(dcb, srb);
974 		waiting_set_timer(acb, HZ / 50);
975 	}
976 }
977 
978 /* Prepare SRB for being sent to Device DCB w/ command *cmd */
979 static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
980 		struct ScsiReqBlk *srb)
981 {
982 	int nseg;
983 	enum dma_data_direction dir = cmd->sc_data_direction;
984 	dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n",
985 		cmd->serial_number, dcb->target_id, dcb->target_lun);
986 
987 	srb->dcb = dcb;
988 	srb->cmd = cmd;
989 	srb->sg_count = 0;
990 	srb->total_xfer_length = 0;
991 	srb->sg_bus_addr = 0;
992 	srb->sg_index = 0;
993 	srb->adapter_status = 0;
994 	srb->target_status = 0;
995 	srb->msg_count = 0;
996 	srb->status = 0;
997 	srb->flag = 0;
998 	srb->state = 0;
999 	srb->retry_count = 0;
1000 	srb->tag_number = TAG_NONE;
1001 	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
1002 	srb->end_message = 0;
1003 
1004 	nseg = scsi_dma_map(cmd);
1005 	BUG_ON(nseg < 0);
1006 
1007 	if (dir == PCI_DMA_NONE || !nseg) {
1008 		dprintkdbg(DBG_0,
1009 			"build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
1010 			   cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd),
1011 			   srb->segment_x[0].address);
1012 	} else {
1013 		int i;
1014 		u32 reqlen = scsi_bufflen(cmd);
1015 		struct scatterlist *sg;
1016 		struct SGentry *sgp = srb->segment_x;
1017 
1018 		srb->sg_count = nseg;
1019 
1020 		dprintkdbg(DBG_0,
1021 			   "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
1022 			   reqlen, scsi_sglist(cmd), scsi_sg_count(cmd),
1023 			   srb->sg_count);
1024 
1025 		scsi_for_each_sg(cmd, sg, srb->sg_count, i) {
1026 			u32 busaddr = (u32)sg_dma_address(sg);
1027 			u32 seglen = (u32)sg->length;
1028 			sgp[i].address = busaddr;
1029 			sgp[i].length = seglen;
1030 			srb->total_xfer_length += seglen;
1031 		}
1032 		sgp += srb->sg_count - 1;
1033 
1034 		/*
1035 		 * adjust last page if too big as it is allocated
1036 		 * on even page boundaries
1037 		 */
1038 		if (srb->total_xfer_length > reqlen) {
1039 			sgp->length -= (srb->total_xfer_length - reqlen);
1040 			srb->total_xfer_length = reqlen;
1041 		}
1042 
1043 		/* Fixup for WIDE padding - make sure length is even */
1044 		if (dcb->sync_period & WIDE_SYNC &&
1045 		    srb->total_xfer_length % 2) {
1046 			srb->total_xfer_length++;
1047 			sgp->length++;
1048 		}
1049 
1050 		srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
1051 						srb->segment_x,
1052 				            	SEGMENTX_LEN,
1053 				            	PCI_DMA_TODEVICE);
1054 
1055 		dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
1056 			srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
1057 	}
1058 
1059 	srb->request_length = srb->total_xfer_length;
1060 }
1061 
1062 
1063 /**
1064  * dc395x_queue_command - queue scsi command passed from the mid
1065  * layer, invoke 'done' on completion
1066  *
1067  * @cmd: pointer to scsi command object
1068  * @done: function pointer to be invoked on completion
1069  *
1070  * Returns 1 if the adapter (host) is busy, else returns 0. One
1071  * reason for an adapter to be busy is that the number
1072  * of outstanding queued commands is already equal to
1073  * struct Scsi_Host::can_queue .
1074  *
1075  * Required: if struct Scsi_Host::can_queue is ever non-zero
1076  *           then this function is required.
1077  *
1078  * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
1079  *        and is expected to be held on return.
1080  *
1081  **/
1082 static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1083 {
1084 	struct DeviceCtlBlk *dcb;
1085 	struct ScsiReqBlk *srb;
1086 	struct AdapterCtlBlk *acb =
1087 	    (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1088 	dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n",
1089 		cmd->serial_number, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
1090 
1091 	/* Assume BAD_TARGET; will be cleared later */
1092 	cmd->result = DID_BAD_TARGET << 16;
1093 
1094 	/* ignore invalid targets */
1095 	if (cmd->device->id >= acb->scsi_host->max_id ||
1096 	    cmd->device->lun >= acb->scsi_host->max_lun ||
1097 	    cmd->device->lun >31) {
1098 		goto complete;
1099 	}
1100 
1101 	/* does the specified lun on the specified device exist */
1102 	if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
1103 		dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
1104 			cmd->device->id, cmd->device->lun);
1105 		goto complete;
1106 	}
1107 
1108 	/* do we have a DCB for the device */
1109 	dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1110 	if (!dcb) {
1111 		/* should never happen */
1112 		dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
1113 			cmd->device->id, cmd->device->lun);
1114 		goto complete;
1115 	}
1116 
1117 	/* set callback and clear result in the command */
1118 	cmd->scsi_done = done;
1119 	cmd->result = 0;
1120 
1121 	srb = srb_get_free(acb);
1122 	if (!srb)
1123 	{
1124 		/*
1125 		 * Return 1 since we are unable to queue this command at this
1126 		 * point in time.
1127 		 */
1128 		dprintkdbg(DBG_0, "queue_command: No free srb's\n");
1129 		return 1;
1130 	}
1131 
1132 	build_srb(cmd, dcb, srb);
1133 
1134 	if (!list_empty(&dcb->srb_waiting_list)) {
1135 		/* append to waiting queue */
1136 		srb_waiting_append(dcb, srb);
1137 		waiting_process_next(acb);
1138 	} else {
1139 		/* process immediately */
1140 		send_srb(acb, srb);
1141 	}
1142 	dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->serial_number);
1143 	return 0;
1144 
1145 complete:
1146 	/*
1147 	 * Complete the command immediatey, and then return 0 to
1148 	 * indicate that we have handled the command. This is usually
1149 	 * done when the commad is for things like non existent
1150 	 * devices.
1151 	 */
1152 	done(cmd);
1153 	return 0;
1154 }
1155 
1156 
1157 /*
1158  * Return the disk geometry for the given SCSI device.
1159  */
1160 static int dc395x_bios_param(struct scsi_device *sdev,
1161 		struct block_device *bdev, sector_t capacity, int *info)
1162 {
1163 #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
1164 	int heads, sectors, cylinders;
1165 	struct AdapterCtlBlk *acb;
1166 	int size = capacity;
1167 
1168 	dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
1169 	acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
1170 	heads = 64;
1171 	sectors = 32;
1172 	cylinders = size / (heads * sectors);
1173 
1174 	if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
1175 		heads = 255;
1176 		sectors = 63;
1177 		cylinders = size / (heads * sectors);
1178 	}
1179 	geom[0] = heads;
1180 	geom[1] = sectors;
1181 	geom[2] = cylinders;
1182 	return 0;
1183 #else
1184 	return scsicam_bios_param(bdev, capacity, info);
1185 #endif
1186 }
1187 
1188 
1189 static void dump_register_info(struct AdapterCtlBlk *acb,
1190 		struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
1191 {
1192 	u16 pstat;
1193 	struct pci_dev *dev = acb->dev;
1194 	pci_read_config_word(dev, PCI_STATUS, &pstat);
1195 	if (!dcb)
1196 		dcb = acb->active_dcb;
1197 	if (!srb && dcb)
1198 		srb = dcb->active_srb;
1199 	if (srb) {
1200 		if (!srb->cmd)
1201 			dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
1202 				srb, srb->cmd);
1203 		else
1204 			dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) "
1205 				 "cmnd=0x%02x <%02i-%i>\n",
1206 				srb, srb->cmd, srb->cmd->serial_number,
1207 				srb->cmd->cmnd[0], srb->cmd->device->id,
1208 			       	srb->cmd->device->lun);
1209 		printk("  sglist=%p cnt=%i idx=%i len=%zu\n",
1210 		       srb->segment_x, srb->sg_count, srb->sg_index,
1211 		       srb->total_xfer_length);
1212 		printk("  state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
1213 		       srb->state, srb->status, srb->scsi_phase,
1214 		       (acb->active_dcb) ? "" : "not");
1215 	}
1216 	dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
1217 		"signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
1218 		"rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
1219 		"config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
1220 		DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
1221 		DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
1222 		DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
1223 		DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
1224 		DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
1225 		DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
1226 		DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
1227 		DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
1228 		DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
1229 		DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
1230 		DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
1231 		DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
1232 		DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
1233 	dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
1234 		"irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
1235 		"ctctr=0x%08x addr=0x%08x:0x%08x}\n",
1236 		DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
1237 		DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
1238 		DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
1239 		DC395x_read8(acb, TRM_S1040_DMA_STATUS),
1240 		DC395x_read8(acb, TRM_S1040_DMA_INTEN),
1241 		DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
1242 		DC395x_read32(acb, TRM_S1040_DMA_XCNT),
1243 		DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
1244 		DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
1245 		DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
1246 	dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
1247 		"pci{status=0x%04x}\n",
1248 		DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
1249 		DC395x_read8(acb, TRM_S1040_GEN_STATUS),
1250 		DC395x_read8(acb, TRM_S1040_GEN_TIMER),
1251 		pstat);
1252 }
1253 
1254 
1255 static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
1256 {
1257 #if debug_enabled(DBG_FIFO)
1258 	u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1259 	u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
1260 	if (!(fifocnt & 0x40))
1261 		dprintkdbg(DBG_FIFO,
1262 			"clear_fifo: (%i bytes) on phase %02x in %s\n",
1263 			fifocnt & 0x3f, lines, txt);
1264 #endif
1265 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
1266 }
1267 
1268 
1269 static void reset_dev_param(struct AdapterCtlBlk *acb)
1270 {
1271 	struct DeviceCtlBlk *dcb;
1272 	struct NvRamType *eeprom = &acb->eeprom;
1273 	dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
1274 
1275 	list_for_each_entry(dcb, &acb->dcb_list, list) {
1276 		u8 period_index;
1277 
1278 		dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
1279 		dcb->sync_period = 0;
1280 		dcb->sync_offset = 0;
1281 
1282 		dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
1283 		period_index = eeprom->target[dcb->target_id].period & 0x07;
1284 		dcb->min_nego_period = clock_period[period_index];
1285 		if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
1286 		    || !(acb->config & HCC_WIDE_CARD))
1287 			dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
1288 	}
1289 }
1290 
1291 
1292 /*
1293  * perform a hard reset on the SCSI bus
1294  * @cmd - some command for this host (for fetching hooks)
1295  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1296  */
1297 static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1298 {
1299 	struct AdapterCtlBlk *acb =
1300 		(struct AdapterCtlBlk *)cmd->device->host->hostdata;
1301 	dprintkl(KERN_INFO,
1302 		"eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n",
1303 		cmd->serial_number, cmd->device->id, cmd->device->lun, cmd);
1304 
1305 	if (timer_pending(&acb->waiting_timer))
1306 		del_timer(&acb->waiting_timer);
1307 
1308 	/*
1309 	 * disable interrupt
1310 	 */
1311 	DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
1312 	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
1313 	DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
1314 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
1315 
1316 	reset_scsi_bus(acb);
1317 	udelay(500);
1318 
1319 	/* We may be in serious trouble. Wait some seconds */
1320 	acb->scsi_host->last_reset =
1321 	    jiffies + 3 * HZ / 2 +
1322 	    HZ * acb->eeprom.delay_time;
1323 
1324 	/*
1325 	 * re-enable interrupt
1326 	 */
1327 	/* Clear SCSI FIFO          */
1328 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
1329 	clear_fifo(acb, "eh_bus_reset");
1330 	/* Delete pending IRQ */
1331 	DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1332 	set_basic_config(acb);
1333 
1334 	reset_dev_param(acb);
1335 	doing_srb_done(acb, DID_RESET, cmd, 0);
1336 	acb->active_dcb = NULL;
1337 	acb->acb_flag = 0;	/* RESET_DETECT, RESET_DONE ,RESET_DEV */
1338 	waiting_process_next(acb);
1339 
1340 	return SUCCESS;
1341 }
1342 
1343 static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
1344 {
1345 	int rc;
1346 
1347 	spin_lock_irq(cmd->device->host->host_lock);
1348 	rc = __dc395x_eh_bus_reset(cmd);
1349 	spin_unlock_irq(cmd->device->host->host_lock);
1350 
1351 	return rc;
1352 }
1353 
1354 /*
1355  * abort an errant SCSI command
1356  * @cmd - command to be aborted
1357  * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
1358  */
1359 static int dc395x_eh_abort(struct scsi_cmnd *cmd)
1360 {
1361 	/*
1362 	 * Look into our command queues: If it has not been sent already,
1363 	 * we remove it and return success. Otherwise fail.
1364 	 */
1365 	struct AdapterCtlBlk *acb =
1366 	    (struct AdapterCtlBlk *)cmd->device->host->hostdata;
1367 	struct DeviceCtlBlk *dcb;
1368 	struct ScsiReqBlk *srb;
1369 	dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n",
1370 		cmd->serial_number, cmd->device->id, cmd->device->lun, cmd);
1371 
1372 	dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
1373 	if (!dcb) {
1374 		dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
1375 		return FAILED;
1376 	}
1377 
1378 	srb = find_cmd(cmd, &dcb->srb_waiting_list);
1379 	if (srb) {
1380 		srb_waiting_remove(dcb, srb);
1381 		pci_unmap_srb_sense(acb, srb);
1382 		pci_unmap_srb(acb, srb);
1383 		free_tag(dcb, srb);
1384 		srb_free_insert(acb, srb);
1385 		dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
1386 		cmd->result = DID_ABORT << 16;
1387 		return SUCCESS;
1388 	}
1389 	srb = find_cmd(cmd, &dcb->srb_going_list);
1390 	if (srb) {
1391 		dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
1392 		/* XXX: Should abort the command here */
1393 	} else {
1394 		dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
1395 	}
1396 	return FAILED;
1397 }
1398 
1399 
1400 /* SDTR */
1401 static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1402 		struct ScsiReqBlk *srb)
1403 {
1404 	u8 *ptr = srb->msgout_buf + srb->msg_count;
1405 	if (srb->msg_count > 1) {
1406 		dprintkl(KERN_INFO,
1407 			"build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1408 			srb->msg_count, srb->msgout_buf[0],
1409 			srb->msgout_buf[1]);
1410 		return;
1411 	}
1412 	if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
1413 		dcb->sync_offset = 0;
1414 		dcb->min_nego_period = 200 >> 2;
1415 	} else if (dcb->sync_offset == 0)
1416 		dcb->sync_offset = SYNC_NEGO_OFFSET;
1417 
1418 	*ptr++ = MSG_EXTENDED;	/* (01h) */
1419 	*ptr++ = 3;		/* length */
1420 	*ptr++ = EXTENDED_SDTR;	/* (01h) */
1421 	*ptr++ = dcb->min_nego_period;	/* Transfer period (in 4ns) */
1422 	*ptr++ = dcb->sync_offset;	/* Transfer period (max. REQ/ACK dist) */
1423 	srb->msg_count += 5;
1424 	srb->state |= SRB_DO_SYNC_NEGO;
1425 }
1426 
1427 
1428 /* WDTR */
1429 static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
1430 		struct ScsiReqBlk *srb)
1431 {
1432 	u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
1433 		   (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
1434 	u8 *ptr = srb->msgout_buf + srb->msg_count;
1435 	if (srb->msg_count > 1) {
1436 		dprintkl(KERN_INFO,
1437 			"build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
1438 			srb->msg_count, srb->msgout_buf[0],
1439 			srb->msgout_buf[1]);
1440 		return;
1441 	}
1442 	*ptr++ = MSG_EXTENDED;	/* (01h) */
1443 	*ptr++ = 2;		/* length */
1444 	*ptr++ = EXTENDED_WDTR;	/* (03h) */
1445 	*ptr++ = wide;
1446 	srb->msg_count += 4;
1447 	srb->state |= SRB_DO_WIDE_NEGO;
1448 }
1449 
1450 
1451 #if 0
1452 /* Timer to work around chip flaw: When selecting and the bus is
1453  * busy, we sometimes miss a Selection timeout IRQ */
1454 void selection_timeout_missed(unsigned long ptr);
1455 /* Sets the timer to wake us up */
1456 static void selto_timer(struct AdapterCtlBlk *acb)
1457 {
1458 	if (timer_pending(&acb->selto_timer))
1459 		return;
1460 	acb->selto_timer.function = selection_timeout_missed;
1461 	acb->selto_timer.data = (unsigned long) acb;
1462 	if (time_before
1463 	    (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2))
1464 		acb->selto_timer.expires =
1465 		    acb->scsi_host->last_reset + HZ / 2 + 1;
1466 	else
1467 		acb->selto_timer.expires = jiffies + HZ + 1;
1468 	add_timer(&acb->selto_timer);
1469 }
1470 
1471 
1472 void selection_timeout_missed(unsigned long ptr)
1473 {
1474 	unsigned long flags;
1475 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
1476 	struct ScsiReqBlk *srb;
1477 	dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
1478 	if (!acb->active_dcb || !acb->active_dcb->active_srb) {
1479 		dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
1480 		return;
1481 	}
1482 	DC395x_LOCK_IO(acb->scsi_host, flags);
1483 	srb = acb->active_dcb->active_srb;
1484 	disconnect(acb);
1485 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
1486 }
1487 #endif
1488 
1489 
1490 static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
1491 		struct ScsiReqBlk* srb)
1492 {
1493 	u16 s_stat2, return_code;
1494 	u8 s_stat, scsicommand, i, identify_message;
1495 	u8 *ptr;
1496 	dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n",
1497 		srb->cmd->serial_number, dcb->target_id, dcb->target_lun, srb);
1498 
1499 	srb->tag_number = TAG_NONE;	/* acb->tag_max_num: had error read in eeprom */
1500 
1501 	s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
1502 	s_stat2 = 0;
1503 	s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1504 #if 1
1505 	if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
1506 		dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n",
1507 			srb->cmd->serial_number, s_stat, s_stat2);
1508 		/*
1509 		 * Try anyway?
1510 		 *
1511 		 * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
1512 		 * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed!
1513 		 * (This is likely to be a bug in the hardware. Obviously, most people
1514 		 *  only have one initiator per SCSI bus.)
1515 		 * Instead let this fail and have the timer make sure the command is
1516 		 * tried again after a short time
1517 		 */
1518 		/*selto_timer (acb); */
1519 		return 1;
1520 	}
1521 #endif
1522 	if (acb->active_dcb) {
1523 		dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a"
1524 			"command while another command (pid#%li) is active.",
1525 			srb->cmd->serial_number,
1526 			acb->active_dcb->active_srb ?
1527 			    acb->active_dcb->active_srb->cmd->serial_number : 0);
1528 		return 1;
1529 	}
1530 	if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1531 		dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n",
1532 			srb->cmd->serial_number);
1533 		return 1;
1534 	}
1535 	/* Allow starting of SCSI commands half a second before we allow the mid-level
1536 	 * to queue them again after a reset */
1537 	if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) {
1538 		dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
1539 		return 1;
1540 	}
1541 
1542 	/* Flush FIFO */
1543 	clear_fifo(acb, "start_scsi");
1544 	DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
1545 	DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
1546 	DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
1547 	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
1548 	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
1549 
1550 	identify_message = dcb->identify_msg;
1551 	/*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
1552 	/* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
1553 	if (srb->flag & AUTO_REQSENSE)
1554 		identify_message &= 0xBF;
1555 
1556 	if (((srb->cmd->cmnd[0] == INQUIRY)
1557 	     || (srb->cmd->cmnd[0] == REQUEST_SENSE)
1558 	     || (srb->flag & AUTO_REQSENSE))
1559 	    && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
1560 		 && !(dcb->sync_mode & WIDE_NEGO_DONE))
1561 		|| ((dcb->sync_mode & SYNC_NEGO_ENABLE)
1562 		    && !(dcb->sync_mode & SYNC_NEGO_DONE)))
1563 	    && (dcb->target_lun == 0)) {
1564 		srb->msgout_buf[0] = identify_message;
1565 		srb->msg_count = 1;
1566 		scsicommand = SCMD_SEL_ATNSTOP;
1567 		srb->state = SRB_MSGOUT;
1568 #ifndef SYNC_FIRST
1569 		if (dcb->sync_mode & WIDE_NEGO_ENABLE
1570 		    && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1571 			build_wdtr(acb, dcb, srb);
1572 			goto no_cmd;
1573 		}
1574 #endif
1575 		if (dcb->sync_mode & SYNC_NEGO_ENABLE
1576 		    && dcb->inquiry7 & SCSI_INQ_SYNC) {
1577 			build_sdtr(acb, dcb, srb);
1578 			goto no_cmd;
1579 		}
1580 		if (dcb->sync_mode & WIDE_NEGO_ENABLE
1581 		    && dcb->inquiry7 & SCSI_INQ_WBUS16) {
1582 			build_wdtr(acb, dcb, srb);
1583 			goto no_cmd;
1584 		}
1585 		srb->msg_count = 0;
1586 	}
1587 	/* Send identify message */
1588 	DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
1589 
1590 	scsicommand = SCMD_SEL_ATN;
1591 	srb->state = SRB_START_;
1592 #ifndef DC395x_NO_TAGQ
1593 	if ((dcb->sync_mode & EN_TAG_QUEUEING)
1594 	    && (identify_message & 0xC0)) {
1595 		/* Send Tag message */
1596 		u32 tag_mask = 1;
1597 		u8 tag_number = 0;
1598 		while (tag_mask & dcb->tag_mask
1599 		       && tag_number <= dcb->max_command) {
1600 			tag_mask = tag_mask << 1;
1601 			tag_number++;
1602 		}
1603 		if (tag_number >= dcb->max_command) {
1604 			dprintkl(KERN_WARNING, "start_scsi: (pid#%li) "
1605 				"Out of tags target=<%02i-%i>)\n",
1606 				srb->cmd->serial_number, srb->cmd->device->id,
1607 				srb->cmd->device->lun);
1608 			srb->state = SRB_READY;
1609 			DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1610 				       DO_HWRESELECT);
1611 			return 1;
1612 		}
1613 		/* Send Tag id */
1614 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
1615 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
1616 		dcb->tag_mask |= tag_mask;
1617 		srb->tag_number = tag_number;
1618 		scsicommand = SCMD_SEL_ATN3;
1619 		srb->state = SRB_START_;
1620 	}
1621 #endif
1622 /*polling:*/
1623 	/* Send CDB ..command block ......... */
1624 	dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n",
1625 		srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun,
1626 		srb->cmd->cmnd[0], srb->tag_number);
1627 	if (srb->flag & AUTO_REQSENSE) {
1628 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1629 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1630 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1631 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1632 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1633 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1634 	} else {
1635 		ptr = (u8 *)srb->cmd->cmnd;
1636 		for (i = 0; i < srb->cmd->cmd_len; i++)
1637 			DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1638 	}
1639       no_cmd:
1640 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1641 		       DO_HWRESELECT | DO_DATALATCH);
1642 	if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
1643 		/*
1644 		 * If start_scsi return 1:
1645 		 * we caught an interrupt (must be reset or reselection ... )
1646 		 * : Let's process it first!
1647 		 */
1648 		dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n",
1649 			srb->cmd->serial_number, dcb->target_id, dcb->target_lun);
1650 		srb->state = SRB_READY;
1651 		free_tag(dcb, srb);
1652 		srb->msg_count = 0;
1653 		return_code = 1;
1654 		/* This IRQ should NOT get lost, as we did not acknowledge it */
1655 	} else {
1656 		/*
1657 		 * If start_scsi returns 0:
1658 		 * we know that the SCSI processor is free
1659 		 */
1660 		srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
1661 		dcb->active_srb = srb;
1662 		acb->active_dcb = dcb;
1663 		return_code = 0;
1664 		/* it's important for atn stop */
1665 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
1666 			       DO_DATALATCH | DO_HWRESELECT);
1667 		/* SCSI command */
1668 		DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
1669 	}
1670 	return return_code;
1671 }
1672 
1673 
1674 #define DC395x_ENABLE_MSGOUT \
1675  DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
1676  srb->state |= SRB_MSGOUT
1677 
1678 
1679 /* abort command */
1680 static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
1681 		struct ScsiReqBlk *srb)
1682 {
1683 	srb->msgout_buf[0] = ABORT;
1684 	srb->msg_count = 1;
1685 	DC395x_ENABLE_MSGOUT;
1686 	srb->state &= ~SRB_MSGIN;
1687 	srb->state |= SRB_MSGOUT;
1688 }
1689 
1690 
1691 /**
1692  * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
1693  *                           have been triggered for this card.
1694  *
1695  * @acb:	 a pointer to the adpter control block
1696  * @scsi_status: the status return when we checked the card
1697  **/
1698 static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
1699 		u16 scsi_status)
1700 {
1701 	struct DeviceCtlBlk *dcb;
1702 	struct ScsiReqBlk *srb;
1703 	u16 phase;
1704 	u8 scsi_intstatus;
1705 	unsigned long flags;
1706 	void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
1707 			      u16 *);
1708 
1709 	DC395x_LOCK_IO(acb->scsi_host, flags);
1710 
1711 	/* This acknowledges the IRQ */
1712 	scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
1713 	if ((scsi_status & 0x2007) == 0x2002)
1714 		dprintkl(KERN_DEBUG,
1715 			"COP after COP completed? %04x\n", scsi_status);
1716 	if (debug_enabled(DBG_KG)) {
1717 		if (scsi_intstatus & INT_SELTIMEOUT)
1718 			dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
1719 	}
1720 	/*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
1721 
1722 	if (timer_pending(&acb->selto_timer))
1723 		del_timer(&acb->selto_timer);
1724 
1725 	if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
1726 		disconnect(acb);	/* bus free interrupt  */
1727 		goto out_unlock;
1728 	}
1729 	if (scsi_intstatus & INT_RESELECTED) {
1730 		reselect(acb);
1731 		goto out_unlock;
1732 	}
1733 	if (scsi_intstatus & INT_SELECT) {
1734 		dprintkl(KERN_INFO, "Host does not support target mode!\n");
1735 		goto out_unlock;
1736 	}
1737 	if (scsi_intstatus & INT_SCSIRESET) {
1738 		scsi_reset_detect(acb);
1739 		goto out_unlock;
1740 	}
1741 	if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
1742 		dcb = acb->active_dcb;
1743 		if (!dcb) {
1744 			dprintkl(KERN_DEBUG,
1745 				"Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
1746 				scsi_status, scsi_intstatus);
1747 			goto out_unlock;
1748 		}
1749 		srb = dcb->active_srb;
1750 		if (dcb->flag & ABORT_DEV_) {
1751 			dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
1752 			enable_msgout_abort(acb, srb);
1753 		}
1754 
1755 		/* software sequential machine */
1756 		phase = (u16)srb->scsi_phase;
1757 
1758 		/*
1759 		 * 62037 or 62137
1760 		 * call  dc395x_scsi_phase0[]... "phase entry"
1761 		 * handle every phase before start transfer
1762 		 */
1763 		/* data_out_phase0,	phase:0 */
1764 		/* data_in_phase0,	phase:1 */
1765 		/* command_phase0,	phase:2 */
1766 		/* status_phase0,	phase:3 */
1767 		/* nop0,		phase:4 PH_BUS_FREE .. initial phase */
1768 		/* nop0,		phase:5 PH_BUS_FREE .. initial phase */
1769 		/* msgout_phase0,	phase:6 */
1770 		/* msgin_phase0,	phase:7 */
1771 		dc395x_statev = dc395x_scsi_phase0[phase];
1772 		dc395x_statev(acb, srb, &scsi_status);
1773 
1774 		/*
1775 		 * if there were any exception occured scsi_status
1776 		 * will be modify to bus free phase new scsi_status
1777 		 * transfer out from ... previous dc395x_statev
1778 		 */
1779 		srb->scsi_phase = scsi_status & PHASEMASK;
1780 		phase = (u16)scsi_status & PHASEMASK;
1781 
1782 		/*
1783 		 * call  dc395x_scsi_phase1[]... "phase entry" handle
1784 		 * every phase to do transfer
1785 		 */
1786 		/* data_out_phase1,	phase:0 */
1787 		/* data_in_phase1,	phase:1 */
1788 		/* command_phase1,	phase:2 */
1789 		/* status_phase1,	phase:3 */
1790 		/* nop1,		phase:4 PH_BUS_FREE .. initial phase */
1791 		/* nop1,		phase:5 PH_BUS_FREE .. initial phase */
1792 		/* msgout_phase1,	phase:6 */
1793 		/* msgin_phase1,	phase:7 */
1794 		dc395x_statev = dc395x_scsi_phase1[phase];
1795 		dc395x_statev(acb, srb, &scsi_status);
1796 	}
1797       out_unlock:
1798 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
1799 }
1800 
1801 
1802 static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
1803 {
1804 	struct AdapterCtlBlk *acb = dev_id;
1805 	u16 scsi_status;
1806 	u8 dma_status;
1807 	irqreturn_t handled = IRQ_NONE;
1808 
1809 	/*
1810 	 * Check for pending interrupt
1811 	 */
1812 	scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
1813 	dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
1814 	if (scsi_status & SCSIINTERRUPT) {
1815 		/* interrupt pending - let's process it! */
1816 		dc395x_handle_interrupt(acb, scsi_status);
1817 		handled = IRQ_HANDLED;
1818 	}
1819 	else if (dma_status & 0x20) {
1820 		/* Error from the DMA engine */
1821 		dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
1822 #if 0
1823 		dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
1824 		if (acb->active_dcb) {
1825 			acb->active_dcb-> flag |= ABORT_DEV_;
1826 			if (acb->active_dcb->active_srb)
1827 				enable_msgout_abort(acb, acb->active_dcb->active_srb);
1828 		}
1829 		DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
1830 #else
1831 		dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
1832 		acb = NULL;
1833 #endif
1834 		handled = IRQ_HANDLED;
1835 	}
1836 
1837 	return handled;
1838 }
1839 
1840 
1841 static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1842 		u16 *pscsi_status)
1843 {
1844 	dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->serial_number);
1845 	if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
1846 		*pscsi_status = PH_BUS_FREE;	/*.. initial phase */
1847 
1848 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
1849 	srb->state &= ~SRB_MSGOUT;
1850 }
1851 
1852 
1853 static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1854 		u16 *pscsi_status)
1855 {
1856 	u16 i;
1857 	u8 *ptr;
1858 	dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->serial_number);
1859 
1860 	clear_fifo(acb, "msgout_phase1");
1861 	if (!(srb->state & SRB_MSGOUT)) {
1862 		srb->state |= SRB_MSGOUT;
1863 		dprintkl(KERN_DEBUG,
1864 			"msgout_phase1: (pid#%li) Phase unexpected\n",
1865 			srb->cmd->serial_number);	/* So what ? */
1866 	}
1867 	if (!srb->msg_count) {
1868 		dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n",
1869 			srb->cmd->serial_number);
1870 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
1871 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
1872 		DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1873 		return;
1874 	}
1875 	ptr = (u8 *)srb->msgout_buf;
1876 	for (i = 0; i < srb->msg_count; i++)
1877 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
1878 	srb->msg_count = 0;
1879 	if (srb->msgout_buf[0] == MSG_ABORT)
1880 		srb->state = SRB_ABORT_SENT;
1881 
1882 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1883 }
1884 
1885 
1886 static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1887 		u16 *pscsi_status)
1888 {
1889 	dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->serial_number);
1890 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1891 }
1892 
1893 
1894 static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
1895 		u16 *pscsi_status)
1896 {
1897 	struct DeviceCtlBlk *dcb;
1898 	u8 *ptr;
1899 	u16 i;
1900 	dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->serial_number);
1901 
1902 	clear_fifo(acb, "command_phase1");
1903 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
1904 	if (!(srb->flag & AUTO_REQSENSE)) {
1905 		ptr = (u8 *)srb->cmd->cmnd;
1906 		for (i = 0; i < srb->cmd->cmd_len; i++) {
1907 			DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
1908 			ptr++;
1909 		}
1910 	} else {
1911 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
1912 		dcb = acb->active_dcb;
1913 		/* target id */
1914 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
1915 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1916 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1917 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, SCSI_SENSE_BUFFERSIZE);
1918 		DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
1919 	}
1920 	srb->state |= SRB_COMMAND;
1921 	/* it's important for atn stop */
1922 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
1923 	/* SCSI command */
1924 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
1925 }
1926 
1927 
1928 /*
1929  * Verify that the remaining space in the hw sg lists is the same as
1930  * the count of remaining bytes in srb->total_xfer_length
1931  */
1932 static void sg_verify_length(struct ScsiReqBlk *srb)
1933 {
1934 	if (debug_enabled(DBG_SG)) {
1935 		unsigned len = 0;
1936 		unsigned idx = srb->sg_index;
1937 		struct SGentry *psge = srb->segment_x + idx;
1938 		for (; idx < srb->sg_count; psge++, idx++)
1939 			len += psge->length;
1940 		if (len != srb->total_xfer_length)
1941 			dprintkdbg(DBG_SG,
1942 			       "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
1943 			       srb->total_xfer_length, len);
1944 	}
1945 }
1946 
1947 
1948 /*
1949  * Compute the next Scatter Gather list index and adjust its length
1950  * and address if necessary
1951  */
1952 static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
1953 {
1954 	u8 idx;
1955 	u32 xferred = srb->total_xfer_length - left; /* bytes transfered */
1956 	struct SGentry *psge = srb->segment_x + srb->sg_index;
1957 
1958 	dprintkdbg(DBG_0,
1959 		"sg_update_list: Transfered %i of %i bytes, %i remain\n",
1960 		xferred, srb->total_xfer_length, left);
1961 	if (xferred == 0) {
1962 		/* nothing to update since we did not transfer any data */
1963 		return;
1964 	}
1965 
1966 	sg_verify_length(srb);
1967 	srb->total_xfer_length = left;	/* update remaining count */
1968 	for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
1969 		if (xferred >= psge->length) {
1970 			/* Complete SG entries done */
1971 			xferred -= psge->length;
1972 		} else {
1973 			/* Partial SG entry done */
1974 			psge->length -= xferred;
1975 			psge->address += xferred;
1976 			srb->sg_index = idx;
1977 			pci_dma_sync_single_for_device(srb->dcb->
1978 					    acb->dev,
1979 					    srb->sg_bus_addr,
1980 					    SEGMENTX_LEN,
1981 					    PCI_DMA_TODEVICE);
1982 			break;
1983 		}
1984 		psge++;
1985 	}
1986 	sg_verify_length(srb);
1987 }
1988 
1989 
1990 /*
1991  * We have transfered a single byte (PIO mode?) and need to update
1992  * the count of bytes remaining (total_xfer_length) and update the sg
1993  * entry to either point to next byte in the current sg entry, or of
1994  * already at the end to point to the start of the next sg entry
1995  */
1996 static void sg_subtract_one(struct ScsiReqBlk *srb)
1997 {
1998 	sg_update_list(srb, srb->total_xfer_length - 1);
1999 }
2000 
2001 
2002 /*
2003  * cleanup_after_transfer
2004  *
2005  * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
2006  * KG: Currently called from  StatusPhase1 ()
2007  * Should probably also be called from other places
2008  * Best might be to call it in DataXXPhase0, if new phase will differ
2009  */
2010 static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
2011 		struct ScsiReqBlk *srb)
2012 {
2013 	/*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
2014 	if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) {	/* read */
2015 		if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2016 			clear_fifo(acb, "cleanup/in");
2017 		if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2018 			DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2019 	} else {		/* write */
2020 		if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
2021 			DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2022 		if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
2023 			clear_fifo(acb, "cleanup/out");
2024 	}
2025 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
2026 }
2027 
2028 
2029 /*
2030  * Those no of bytes will be transfered w/ PIO through the SCSI FIFO
2031  * Seems to be needed for unknown reasons; could be a hardware bug :-(
2032  */
2033 #define DC395x_LASTPIO 4
2034 
2035 
2036 static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2037 		u16 *pscsi_status)
2038 {
2039 	struct DeviceCtlBlk *dcb = srb->dcb;
2040 	u16 scsi_status = *pscsi_status;
2041 	u32 d_left_counter = 0;
2042 	dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n",
2043 		srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun);
2044 
2045 	/*
2046 	 * KG: We need to drain the buffers before we draw any conclusions!
2047 	 * This means telling the DMA to push the rest into SCSI, telling
2048 	 * SCSI to push the rest to the bus.
2049 	 * However, the device might have been the one to stop us (phase
2050 	 * change), and the data in transit just needs to be accounted so
2051 	 * it can be retransmitted.)
2052 	 */
2053 	/*
2054 	 * KG: Stop DMA engine pushing more data into the SCSI FIFO
2055 	 * If we need more data, the DMA SG list will be freshly set up, anyway
2056 	 */
2057 	dprintkdbg(DBG_PIO, "data_out_phase0: "
2058 		"DMA{fifocnt=0x%02x fifostat=0x%02x} "
2059 		"SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
2060 		DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2061 		DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2062 		DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2063 		DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
2064 		srb->total_xfer_length);
2065 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
2066 
2067 	if (!(srb->state & SRB_XFERPAD)) {
2068 		if (scsi_status & PARITYERROR)
2069 			srb->status |= PARITY_ERROR;
2070 
2071 		/*
2072 		 * KG: Right, we can't just rely on the SCSI_COUNTER, because this
2073 		 * is the no of bytes it got from the DMA engine not the no it
2074 		 * transferred successfully to the device. (And the difference could
2075 		 * be as much as the FIFO size, I guess ...)
2076 		 */
2077 		if (!(scsi_status & SCSIXFERDONE)) {
2078 			/*
2079 			 * when data transfer from DMA FIFO to SCSI FIFO
2080 			 * if there was some data left in SCSI FIFO
2081 			 */
2082 			d_left_counter =
2083 			    (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2084 				  0x1F);
2085 			if (dcb->sync_period & WIDE_SYNC)
2086 				d_left_counter <<= 1;
2087 
2088 			dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
2089 				"SCSI{fifocnt=0x%02x cnt=0x%08x} "
2090 				"DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
2091 				DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2092 				(dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2093 				DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
2094 				DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
2095 				DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2096 				DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2097 				DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
2098 		}
2099 		/*
2100 		 * calculate all the residue data that not yet tranfered
2101 		 * SCSI transfer counter + left in SCSI FIFO data
2102 		 *
2103 		 * .....TRM_S1040_SCSI_COUNTER (24bits)
2104 		 * The counter always decrement by one for every SCSI byte transfer.
2105 		 * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
2106 		 * The counter is SCSI FIFO offset counter (in units of bytes or! words)
2107 		 */
2108 		if (srb->total_xfer_length > DC395x_LASTPIO)
2109 			d_left_counter +=
2110 			    DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2111 
2112 		/* Is this a good idea? */
2113 		/*clear_fifo(acb, "DOP1"); */
2114 		/* KG: What is this supposed to be useful for? WIDE padding stuff? */
2115 		if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
2116 		    && scsi_bufflen(srb->cmd) % 2) {
2117 			d_left_counter = 0;
2118 			dprintkl(KERN_INFO,
2119 				"data_out_phase0: Discard 1 byte (0x%02x)\n",
2120 				scsi_status);
2121 		}
2122 		/*
2123 		 * KG: Oops again. Same thinko as above: The SCSI might have been
2124 		 * faster than the DMA engine, so that it ran out of data.
2125 		 * In that case, we have to do just nothing!
2126 		 * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
2127 		 */
2128 		/*
2129 		 * KG: This is nonsense: We have been WRITING data to the bus
2130 		 * If the SCSI engine has no bytes left, how should the DMA engine?
2131 		 */
2132 		if (d_left_counter == 0) {
2133 			srb->total_xfer_length = 0;
2134 		} else {
2135 			/*
2136 			 * if transfer not yet complete
2137 			 * there were some data residue in SCSI FIFO or
2138 			 * SCSI transfer counter not empty
2139 			 */
2140 			long oldxferred =
2141 			    srb->total_xfer_length - d_left_counter;
2142 			const int diff =
2143 			    (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
2144 			sg_update_list(srb, d_left_counter);
2145 			/* KG: Most ugly hack! Apparently, this works around a chip bug */
2146 			if ((srb->segment_x[srb->sg_index].length ==
2147 			     diff && scsi_sg_count(srb->cmd))
2148 			    || ((oldxferred & ~PAGE_MASK) ==
2149 				(PAGE_SIZE - diff))
2150 			    ) {
2151 				dprintkl(KERN_INFO, "data_out_phase0: "
2152 					"Work around chip bug (%i)?\n", diff);
2153 				d_left_counter =
2154 				    srb->total_xfer_length - diff;
2155 				sg_update_list(srb, d_left_counter);
2156 				/*srb->total_xfer_length -= diff; */
2157 				/*srb->virt_addr += diff; */
2158 				/*if (srb->cmd->use_sg) */
2159 				/*      srb->sg_index++; */
2160 			}
2161 		}
2162 	}
2163 	if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
2164 		cleanup_after_transfer(acb, srb);
2165 	}
2166 }
2167 
2168 
2169 static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2170 		u16 *pscsi_status)
2171 {
2172 	dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n",
2173 		srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun);
2174 	clear_fifo(acb, "data_out_phase1");
2175 	/* do prepare before transfer when data out phase */
2176 	data_io_transfer(acb, srb, XFERDATAOUT);
2177 }
2178 
2179 static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2180 		u16 *pscsi_status)
2181 {
2182 	u16 scsi_status = *pscsi_status;
2183 
2184 	dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n",
2185 		srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun);
2186 
2187 	/*
2188 	 * KG: DataIn is much more tricky than DataOut. When the device is finished
2189 	 * and switches to another phase, the SCSI engine should be finished too.
2190 	 * But: There might still be bytes left in its FIFO to be fetched by the DMA
2191 	 * engine and transferred to memory.
2192 	 * We should wait for the FIFOs to be emptied by that (is there any way to
2193 	 * enforce this?) and then stop the DMA engine, because it might think, that
2194 	 * there are more bytes to follow. Yes, the device might disconnect prior to
2195 	 * having all bytes transferred!
2196 	 * Also we should make sure that all data from the DMA engine buffer's really
2197 	 * made its way to the system memory! Some documentation on this would not
2198 	 * seem to be a bad idea, actually.
2199 	 */
2200 	if (!(srb->state & SRB_XFERPAD)) {
2201 		u32 d_left_counter;
2202 		unsigned int sc, fc;
2203 
2204 		if (scsi_status & PARITYERROR) {
2205 			dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) "
2206 				"Parity Error\n", srb->cmd->serial_number);
2207 			srb->status |= PARITY_ERROR;
2208 		}
2209 		/*
2210 		 * KG: We should wait for the DMA FIFO to be empty ...
2211 		 * but: it would be better to wait first for the SCSI FIFO and then the
2212 		 * the DMA FIFO to become empty? How do we know, that the device not already
2213 		 * sent data to the FIFO in a MsgIn phase, eg.?
2214 		 */
2215 		if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
2216 #if 0
2217 			int ctr = 6000000;
2218 			dprintkl(KERN_DEBUG,
2219 				"DIP0: Wait for DMA FIFO to flush ...\n");
2220 			/*DC395x_write8  (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
2221 			/*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
2222 			/*DC395x_write8  (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
2223 			while (!
2224 			       (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
2225 				0x80) && --ctr);
2226 			if (ctr < 6000000 - 1)
2227 				dprintkl(KERN_DEBUG
2228 				       "DIP0: Had to wait for DMA ...\n");
2229 			if (!ctr)
2230 				dprintkl(KERN_ERR,
2231 				       "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
2232 			/*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
2233 #endif
2234 			dprintkdbg(DBG_KG, "data_in_phase0: "
2235 				"DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
2236 				DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
2237 				DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
2238 		}
2239 		/* Now: Check remainig data: The SCSI counters should tell us ... */
2240 		sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
2241 		fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2242 		d_left_counter = sc + ((fc & 0x1f)
2243 		       << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
2244 			   0));
2245 		dprintkdbg(DBG_KG, "data_in_phase0: "
2246 			"SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
2247 			"DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
2248 			"Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
2249 			fc,
2250 			(srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
2251 			sc,
2252 			fc,
2253 			DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
2254 			DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
2255 			srb->total_xfer_length, d_left_counter);
2256 #if DC395x_LASTPIO
2257 		/* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */
2258 		if (d_left_counter
2259 		    && srb->total_xfer_length <= DC395x_LASTPIO) {
2260 			size_t left_io = srb->total_xfer_length;
2261 
2262 			/*u32 addr = (srb->segment_x[srb->sg_index].address); */
2263 			/*sg_update_list (srb, d_left_counter); */
2264 			dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
2265 				   "for remaining %i bytes:",
2266 				fc & 0x1f,
2267 				(srb->dcb->sync_period & WIDE_SYNC) ?
2268 				    "words" : "bytes",
2269 				srb->total_xfer_length);
2270 			if (srb->dcb->sync_period & WIDE_SYNC)
2271 				DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2272 					      CFG2_WIDEFIFO);
2273 			while (left_io) {
2274 				unsigned char *virt, *base = NULL;
2275 				unsigned long flags = 0;
2276 				size_t len = left_io;
2277 				size_t offset = srb->request_length - left_io;
2278 
2279 				local_irq_save(flags);
2280 				/* Assumption: it's inside one page as it's at most 4 bytes and
2281 				   I just assume it's on a 4-byte boundary */
2282 				base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2283 							   srb->sg_count, &offset, &len);
2284 				virt = base + offset;
2285 
2286 				left_io -= len;
2287 
2288 				while (len) {
2289 					u8 byte;
2290 					byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2291 					*virt++ = byte;
2292 
2293 					if (debug_enabled(DBG_PIO))
2294 						printk(" %02x", byte);
2295 
2296 					d_left_counter--;
2297 					sg_subtract_one(srb);
2298 
2299 					len--;
2300 
2301 					fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
2302 
2303 					if (fc == 0x40) {
2304 						left_io = 0;
2305 						break;
2306 					}
2307 				}
2308 
2309 				WARN_ON((fc != 0x40) == !d_left_counter);
2310 
2311 				if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
2312 					/* Read the last byte ... */
2313 					if (srb->total_xfer_length > 0) {
2314 						u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2315 
2316 						*virt++ = byte;
2317 						srb->total_xfer_length--;
2318 						if (debug_enabled(DBG_PIO))
2319 							printk(" %02x", byte);
2320 					}
2321 
2322 					DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2323 				}
2324 
2325 				scsi_kunmap_atomic_sg(base);
2326 				local_irq_restore(flags);
2327 			}
2328 			/*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
2329 			/*srb->total_xfer_length = 0; */
2330 			if (debug_enabled(DBG_PIO))
2331 				printk("\n");
2332 		}
2333 #endif				/* DC395x_LASTPIO */
2334 
2335 #if 0
2336 		/*
2337 		 * KG: This was in DATAOUT. Does it also belong here?
2338 		 * Nobody seems to know what counter and fifo_cnt count exactly ...
2339 		 */
2340 		if (!(scsi_status & SCSIXFERDONE)) {
2341 			/*
2342 			 * when data transfer from DMA FIFO to SCSI FIFO
2343 			 * if there was some data left in SCSI FIFO
2344 			 */
2345 			d_left_counter =
2346 			    (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
2347 				  0x1F);
2348 			if (srb->dcb->sync_period & WIDE_SYNC)
2349 				d_left_counter <<= 1;
2350 			/*
2351 			 * if WIDE scsi SCSI FIFOCNT unit is word !!!
2352 			 * so need to *= 2
2353 			 * KG: Seems to be correct ...
2354 			 */
2355 		}
2356 #endif
2357 		/* KG: This should not be needed any more! */
2358 		if (d_left_counter == 0
2359 		    || (scsi_status & SCSIXFERCNT_2_ZERO)) {
2360 #if 0
2361 			int ctr = 6000000;
2362 			u8 TempDMAstatus;
2363 			do {
2364 				TempDMAstatus =
2365 				    DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2366 			} while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
2367 			if (!ctr)
2368 				dprintkl(KERN_ERR,
2369 				       "Deadlock in DataInPhase0 waiting for DMA!!\n");
2370 			srb->total_xfer_length = 0;
2371 #endif
2372 			srb->total_xfer_length = d_left_counter;
2373 		} else {	/* phase changed */
2374 			/*
2375 			 * parsing the case:
2376 			 * when a transfer not yet complete
2377 			 * but be disconnected by target
2378 			 * if transfer not yet complete
2379 			 * there were some data residue in SCSI FIFO or
2380 			 * SCSI transfer counter not empty
2381 			 */
2382 			sg_update_list(srb, d_left_counter);
2383 		}
2384 	}
2385 	/* KG: The target may decide to disconnect: Empty FIFO before! */
2386 	if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
2387 		cleanup_after_transfer(acb, srb);
2388 	}
2389 }
2390 
2391 
2392 static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2393 		u16 *pscsi_status)
2394 {
2395 	dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n",
2396 		srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun);
2397 	data_io_transfer(acb, srb, XFERDATAIN);
2398 }
2399 
2400 
2401 static void data_io_transfer(struct AdapterCtlBlk *acb,
2402 		struct ScsiReqBlk *srb, u16 io_dir)
2403 {
2404 	struct DeviceCtlBlk *dcb = srb->dcb;
2405 	u8 bval;
2406 	dprintkdbg(DBG_0,
2407 		"data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
2408 		srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun,
2409 		((io_dir & DMACMD_DIR) ? 'r' : 'w'),
2410 		srb->total_xfer_length, srb->sg_index, srb->sg_count);
2411 	if (srb == acb->tmp_srb)
2412 		dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
2413 	if (srb->sg_index >= srb->sg_count) {
2414 		/* can't happen? out of bounds error */
2415 		return;
2416 	}
2417 
2418 	if (srb->total_xfer_length > DC395x_LASTPIO) {
2419 		u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
2420 		/*
2421 		 * KG: What should we do: Use SCSI Cmd 0x90/0x92?
2422 		 * Maybe, even ABORTXFER would be appropriate
2423 		 */
2424 		if (dma_status & XFERPENDING) {
2425 			dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
2426 				"Expect trouble!\n");
2427 			dump_register_info(acb, dcb, srb);
2428 			DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
2429 		}
2430 		/* clear_fifo(acb, "IO"); */
2431 		/*
2432 		 * load what physical address of Scatter/Gather list table
2433 		 * want to be transfer
2434 		 */
2435 		srb->state |= SRB_DATA_XFER;
2436 		DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
2437 		if (scsi_sg_count(srb->cmd)) {	/* with S/G */
2438 			io_dir |= DMACMD_SG;
2439 			DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2440 				       srb->sg_bus_addr +
2441 				       sizeof(struct SGentry) *
2442 				       srb->sg_index);
2443 			/* load how many bytes in the sg list table */
2444 			DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2445 				       ((u32)(srb->sg_count -
2446 					      srb->sg_index) << 3));
2447 		} else {	/* without S/G */
2448 			io_dir &= ~DMACMD_SG;
2449 			DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
2450 				       srb->segment_x[0].address);
2451 			DC395x_write32(acb, TRM_S1040_DMA_XCNT,
2452 				       srb->segment_x[0].length);
2453 		}
2454 		/* load total transfer length (24bits) max value 16Mbyte */
2455 		DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2456 			       srb->total_xfer_length);
2457 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2458 		if (io_dir & DMACMD_DIR) {	/* read */
2459 			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2460 				      SCMD_DMA_IN);
2461 			DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2462 		} else {
2463 			DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
2464 			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2465 				      SCMD_DMA_OUT);
2466 		}
2467 
2468 	}
2469 #if DC395x_LASTPIO
2470 	else if (srb->total_xfer_length > 0) {	/* The last four bytes: Do PIO */
2471 		/*
2472 		 * load what physical address of Scatter/Gather list table
2473 		 * want to be transfer
2474 		 */
2475 		srb->state |= SRB_DATA_XFER;
2476 		/* load total transfer length (24bits) max value 16Mbyte */
2477 		DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
2478 			       srb->total_xfer_length);
2479 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2480 		if (io_dir & DMACMD_DIR) {	/* read */
2481 			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2482 				      SCMD_FIFO_IN);
2483 		} else {	/* write */
2484 			int ln = srb->total_xfer_length;
2485 			size_t left_io = srb->total_xfer_length;
2486 
2487 			if (srb->dcb->sync_period & WIDE_SYNC)
2488 				DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2489 				     CFG2_WIDEFIFO);
2490 
2491 			while (left_io) {
2492 				unsigned char *virt, *base = NULL;
2493 				unsigned long flags = 0;
2494 				size_t len = left_io;
2495 				size_t offset = srb->request_length - left_io;
2496 
2497 				local_irq_save(flags);
2498 				/* Again, max 4 bytes */
2499 				base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd),
2500 							   srb->sg_count, &offset, &len);
2501 				virt = base + offset;
2502 
2503 				left_io -= len;
2504 
2505 				while (len--) {
2506 					if (debug_enabled(DBG_PIO))
2507 						printk(" %02x", *virt);
2508 
2509 					DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
2510 
2511 					sg_subtract_one(srb);
2512 				}
2513 
2514 				scsi_kunmap_atomic_sg(base);
2515 				local_irq_restore(flags);
2516 			}
2517 			if (srb->dcb->sync_period & WIDE_SYNC) {
2518 				if (ln % 2) {
2519 					DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
2520 					if (debug_enabled(DBG_PIO))
2521 						printk(" |00");
2522 				}
2523 				DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2524 			}
2525 			/*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
2526 			if (debug_enabled(DBG_PIO))
2527 				printk("\n");
2528 			DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
2529 					  SCMD_FIFO_OUT);
2530 		}
2531 	}
2532 #endif				/* DC395x_LASTPIO */
2533 	else {		/* xfer pad */
2534 		u8 data = 0, data2 = 0;
2535 		if (srb->sg_count) {
2536 			srb->adapter_status = H_OVER_UNDER_RUN;
2537 			srb->status |= OVER_RUN;
2538 		}
2539 		/*
2540 		 * KG: despite the fact that we are using 16 bits I/O ops
2541 		 * the SCSI FIFO is only 8 bits according to the docs
2542 		 * (we can set bit 1 in 0x8f to serialize FIFO access ...)
2543 		 */
2544 		if (dcb->sync_period & WIDE_SYNC) {
2545 			DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
2546 			DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
2547 				      CFG2_WIDEFIFO);
2548 			if (io_dir & DMACMD_DIR) {
2549 				data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2550 				data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2551 			} else {
2552 				/* Danger, Robinson: If you find KGs
2553 				 * scattered over the wide disk, the driver
2554 				 * or chip is to blame :-( */
2555 				DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2556 				DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
2557 			}
2558 			DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
2559 		} else {
2560 			DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2561 			/* Danger, Robinson: If you find a collection of Ks on your disk
2562 			 * something broke :-( */
2563 			if (io_dir & DMACMD_DIR)
2564 				data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2565 			else
2566 				DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
2567 		}
2568 		srb->state |= SRB_XFERPAD;
2569 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2570 		/* SCSI command */
2571 		bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
2572 		DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
2573 	}
2574 }
2575 
2576 
2577 static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2578 		u16 *pscsi_status)
2579 {
2580 	dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n",
2581 		srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun);
2582 	srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2583 	srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);	/* get message */
2584 	srb->state = SRB_COMPLETED;
2585 	*pscsi_status = PH_BUS_FREE;	/*.. initial phase */
2586 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2587 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2588 }
2589 
2590 
2591 static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2592 		u16 *pscsi_status)
2593 {
2594 	dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n",
2595 		srb->cmd->serial_number, srb->cmd->device->id, srb->cmd->device->lun);
2596 	srb->state = SRB_STATUS;
2597 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2598 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
2599 }
2600 
2601 
2602 /* Check if the message is complete */
2603 static inline u8 msgin_completed(u8 * msgbuf, u32 len)
2604 {
2605 	if (*msgbuf == EXTENDED_MESSAGE) {
2606 		if (len < 2)
2607 			return 0;
2608 		if (len < msgbuf[1] + 2)
2609 			return 0;
2610 	} else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f)	/* two byte messages */
2611 		if (len < 2)
2612 			return 0;
2613 	return 1;
2614 }
2615 
2616 /* reject_msg */
2617 static inline void msgin_reject(struct AdapterCtlBlk *acb,
2618 		struct ScsiReqBlk *srb)
2619 {
2620 	srb->msgout_buf[0] = MESSAGE_REJECT;
2621 	srb->msg_count = 1;
2622 	DC395x_ENABLE_MSGOUT;
2623 	srb->state &= ~SRB_MSGIN;
2624 	srb->state |= SRB_MSGOUT;
2625 	dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
2626 		srb->msgin_buf[0],
2627 		srb->dcb->target_id, srb->dcb->target_lun);
2628 }
2629 
2630 
2631 static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
2632 		struct DeviceCtlBlk *dcb, u8 tag)
2633 {
2634 	struct ScsiReqBlk *srb = NULL;
2635 	struct ScsiReqBlk *i;
2636 	dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n",
2637 		   srb->cmd->serial_number, tag, srb);
2638 
2639 	if (!(dcb->tag_mask & (1 << tag)))
2640 		dprintkl(KERN_DEBUG,
2641 			"msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
2642 			dcb->tag_mask, tag);
2643 
2644 	if (list_empty(&dcb->srb_going_list))
2645 		goto mingx0;
2646 	list_for_each_entry(i, &dcb->srb_going_list, list) {
2647 		if (i->tag_number == tag) {
2648 			srb = i;
2649 			break;
2650 		}
2651 	}
2652 	if (!srb)
2653 		goto mingx0;
2654 
2655 	dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n",
2656 		srb->cmd->serial_number, srb->dcb->target_id, srb->dcb->target_lun);
2657 	if (dcb->flag & ABORT_DEV_) {
2658 		/*srb->state = SRB_ABORT_SENT; */
2659 		enable_msgout_abort(acb, srb);
2660 	}
2661 
2662 	if (!(srb->state & SRB_DISCONNECT))
2663 		goto mingx0;
2664 
2665 	memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
2666 	srb->state |= dcb->active_srb->state;
2667 	srb->state |= SRB_DATA_XFER;
2668 	dcb->active_srb = srb;
2669 	/* How can we make the DORS happy? */
2670 	return srb;
2671 
2672       mingx0:
2673 	srb = acb->tmp_srb;
2674 	srb->state = SRB_UNEXPECT_RESEL;
2675 	dcb->active_srb = srb;
2676 	srb->msgout_buf[0] = MSG_ABORT_TAG;
2677 	srb->msg_count = 1;
2678 	DC395x_ENABLE_MSGOUT;
2679 	dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
2680 	return srb;
2681 }
2682 
2683 
2684 static inline void reprogram_regs(struct AdapterCtlBlk *acb,
2685 		struct DeviceCtlBlk *dcb)
2686 {
2687 	DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
2688 	DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
2689 	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
2690 	set_xfer_rate(acb, dcb);
2691 }
2692 
2693 
2694 /* set async transfer mode */
2695 static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2696 {
2697 	struct DeviceCtlBlk *dcb = srb->dcb;
2698 	dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
2699 		dcb->target_id, dcb->target_lun);
2700 
2701 	dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
2702 	dcb->sync_mode |= SYNC_NEGO_DONE;
2703 	/*dcb->sync_period &= 0; */
2704 	dcb->sync_offset = 0;
2705 	dcb->min_nego_period = 200 >> 2;	/* 200ns <=> 5 MHz */
2706 	srb->state &= ~SRB_DO_SYNC_NEGO;
2707 	reprogram_regs(acb, dcb);
2708 	if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2709 	    && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2710 		build_wdtr(acb, dcb, srb);
2711 		DC395x_ENABLE_MSGOUT;
2712 		dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
2713 	}
2714 }
2715 
2716 
2717 /* set sync transfer mode */
2718 static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2719 {
2720 	struct DeviceCtlBlk *dcb = srb->dcb;
2721 	u8 bval;
2722 	int fact;
2723 	dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
2724 		"(%02i.%01i MHz) Offset %i\n",
2725 		dcb->target_id, srb->msgin_buf[3] << 2,
2726 		(250 / srb->msgin_buf[3]),
2727 		((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
2728 		srb->msgin_buf[4]);
2729 
2730 	if (srb->msgin_buf[4] > 15)
2731 		srb->msgin_buf[4] = 15;
2732 	if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
2733 		dcb->sync_offset = 0;
2734 	else if (dcb->sync_offset == 0)
2735 		dcb->sync_offset = srb->msgin_buf[4];
2736 	if (srb->msgin_buf[4] > dcb->sync_offset)
2737 		srb->msgin_buf[4] = dcb->sync_offset;
2738 	else
2739 		dcb->sync_offset = srb->msgin_buf[4];
2740 	bval = 0;
2741 	while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
2742 			    || dcb->min_nego_period >
2743 			    clock_period[bval]))
2744 		bval++;
2745 	if (srb->msgin_buf[3] < clock_period[bval])
2746 		dprintkl(KERN_INFO,
2747 			"msgin_set_sync: Increase sync nego period to %ins\n",
2748 			clock_period[bval] << 2);
2749 	srb->msgin_buf[3] = clock_period[bval];
2750 	dcb->sync_period &= 0xf0;
2751 	dcb->sync_period |= ALT_SYNC | bval;
2752 	dcb->min_nego_period = srb->msgin_buf[3];
2753 
2754 	if (dcb->sync_period & WIDE_SYNC)
2755 		fact = 500;
2756 	else
2757 		fact = 250;
2758 
2759 	dprintkl(KERN_INFO,
2760 		"Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
2761 		dcb->target_id, (fact == 500) ? "Wide16" : "",
2762 		dcb->min_nego_period << 2, dcb->sync_offset,
2763 		(fact / dcb->min_nego_period),
2764 		((fact % dcb->min_nego_period) * 10 +
2765 		dcb->min_nego_period / 2) / dcb->min_nego_period);
2766 
2767 	if (!(srb->state & SRB_DO_SYNC_NEGO)) {
2768 		/* Reply with corrected SDTR Message */
2769 		dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
2770 			srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
2771 
2772 		memcpy(srb->msgout_buf, srb->msgin_buf, 5);
2773 		srb->msg_count = 5;
2774 		DC395x_ENABLE_MSGOUT;
2775 		dcb->sync_mode |= SYNC_NEGO_DONE;
2776 	} else {
2777 		if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
2778 		    && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
2779 			build_wdtr(acb, dcb, srb);
2780 			DC395x_ENABLE_MSGOUT;
2781 			dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
2782 		}
2783 	}
2784 	srb->state &= ~SRB_DO_SYNC_NEGO;
2785 	dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
2786 
2787 	reprogram_regs(acb, dcb);
2788 }
2789 
2790 
2791 static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
2792 		struct ScsiReqBlk *srb)
2793 {
2794 	struct DeviceCtlBlk *dcb = srb->dcb;
2795 	dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
2796 
2797 	dcb->sync_period &= ~WIDE_SYNC;
2798 	dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
2799 	dcb->sync_mode |= WIDE_NEGO_DONE;
2800 	srb->state &= ~SRB_DO_WIDE_NEGO;
2801 	reprogram_regs(acb, dcb);
2802 	if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2803 	    && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2804 		build_sdtr(acb, dcb, srb);
2805 		DC395x_ENABLE_MSGOUT;
2806 		dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
2807 	}
2808 }
2809 
2810 static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
2811 {
2812 	struct DeviceCtlBlk *dcb = srb->dcb;
2813 	u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
2814 		   && acb->config & HCC_WIDE_CARD) ? 1 : 0;
2815 	dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
2816 
2817 	if (srb->msgin_buf[3] > wide)
2818 		srb->msgin_buf[3] = wide;
2819 	/* Completed */
2820 	if (!(srb->state & SRB_DO_WIDE_NEGO)) {
2821 		dprintkl(KERN_DEBUG,
2822 			"msgin_set_wide: Wide nego initiated <%02i>\n",
2823 			dcb->target_id);
2824 		memcpy(srb->msgout_buf, srb->msgin_buf, 4);
2825 		srb->msg_count = 4;
2826 		srb->state |= SRB_DO_WIDE_NEGO;
2827 		DC395x_ENABLE_MSGOUT;
2828 	}
2829 
2830 	dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
2831 	if (srb->msgin_buf[3] > 0)
2832 		dcb->sync_period |= WIDE_SYNC;
2833 	else
2834 		dcb->sync_period &= ~WIDE_SYNC;
2835 	srb->state &= ~SRB_DO_WIDE_NEGO;
2836 	/*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
2837 	dprintkdbg(DBG_1,
2838 		"msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
2839 		(8 << srb->msgin_buf[3]), dcb->target_id);
2840 	reprogram_regs(acb, dcb);
2841 	if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
2842 	    && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
2843 		build_sdtr(acb, dcb, srb);
2844 		DC395x_ENABLE_MSGOUT;
2845 		dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
2846 	}
2847 }
2848 
2849 
2850 /*
2851  * extended message codes:
2852  *
2853  *	code	description
2854  *
2855  *	02h	Reserved
2856  *	00h	MODIFY DATA  POINTER
2857  *	01h	SYNCHRONOUS DATA TRANSFER REQUEST
2858  *	03h	WIDE DATA TRANSFER REQUEST
2859  *   04h - 7Fh	Reserved
2860  *   80h - FFh	Vendor specific
2861  */
2862 static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2863 		u16 *pscsi_status)
2864 {
2865 	struct DeviceCtlBlk *dcb = acb->active_dcb;
2866 	dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->serial_number);
2867 
2868 	srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
2869 	if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
2870 		/* Now eval the msg */
2871 		switch (srb->msgin_buf[0]) {
2872 		case DISCONNECT:
2873 			srb->state = SRB_DISCONNECT;
2874 			break;
2875 
2876 		case SIMPLE_QUEUE_TAG:
2877 		case HEAD_OF_QUEUE_TAG:
2878 		case ORDERED_QUEUE_TAG:
2879 			srb =
2880 			    msgin_qtag(acb, dcb,
2881 					      srb->msgin_buf[1]);
2882 			break;
2883 
2884 		case MESSAGE_REJECT:
2885 			DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
2886 				       DO_CLRATN | DO_DATALATCH);
2887 			/* A sync nego message was rejected ! */
2888 			if (srb->state & SRB_DO_SYNC_NEGO) {
2889 				msgin_set_async(acb, srb);
2890 				break;
2891 			}
2892 			/* A wide nego message was rejected ! */
2893 			if (srb->state & SRB_DO_WIDE_NEGO) {
2894 				msgin_set_nowide(acb, srb);
2895 				break;
2896 			}
2897 			enable_msgout_abort(acb, srb);
2898 			/*srb->state |= SRB_ABORT_SENT */
2899 			break;
2900 
2901 		case EXTENDED_MESSAGE:
2902 			/* SDTR */
2903 			if (srb->msgin_buf[1] == 3
2904 			    && srb->msgin_buf[2] == EXTENDED_SDTR) {
2905 				msgin_set_sync(acb, srb);
2906 				break;
2907 			}
2908 			/* WDTR */
2909 			if (srb->msgin_buf[1] == 2
2910 			    && srb->msgin_buf[2] == EXTENDED_WDTR
2911 			    && srb->msgin_buf[3] <= 2) { /* sanity check ... */
2912 				msgin_set_wide(acb, srb);
2913 				break;
2914 			}
2915 			msgin_reject(acb, srb);
2916 			break;
2917 
2918 		case MSG_IGNOREWIDE:
2919 			/* Discard  wide residual */
2920 			dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
2921 			break;
2922 
2923 		case COMMAND_COMPLETE:
2924 			/* nothing has to be done */
2925 			break;
2926 
2927 		case SAVE_POINTERS:
2928 			/*
2929 			 * SAVE POINTER may be ignored as we have the struct
2930 			 * ScsiReqBlk* associated with the scsi command.
2931 			 */
2932 			dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2933 				"SAVE POINTER rem=%i Ignore\n",
2934 				srb->cmd->serial_number, srb->total_xfer_length);
2935 			break;
2936 
2937 		case RESTORE_POINTERS:
2938 			dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
2939 			break;
2940 
2941 		case ABORT:
2942 			dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
2943 				"<%02i-%i> ABORT msg\n",
2944 				srb->cmd->serial_number, dcb->target_id,
2945 				dcb->target_lun);
2946 			dcb->flag |= ABORT_DEV_;
2947 			enable_msgout_abort(acb, srb);
2948 			break;
2949 
2950 		default:
2951 			/* reject unknown messages */
2952 			if (srb->msgin_buf[0] & IDENTIFY_BASE) {
2953 				dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
2954 				srb->msg_count = 1;
2955 				srb->msgout_buf[0] = dcb->identify_msg;
2956 				DC395x_ENABLE_MSGOUT;
2957 				srb->state |= SRB_MSGOUT;
2958 				/*break; */
2959 			}
2960 			msgin_reject(acb, srb);
2961 		}
2962 
2963 		/* Clear counter and MsgIn state */
2964 		srb->state &= ~SRB_MSGIN;
2965 		acb->msg_len = 0;
2966 	}
2967 	*pscsi_status = PH_BUS_FREE;
2968 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important ... you know! */
2969 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
2970 }
2971 
2972 
2973 static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2974 		u16 *pscsi_status)
2975 {
2976 	dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->serial_number);
2977 	clear_fifo(acb, "msgin_phase1");
2978 	DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
2979 	if (!(srb->state & SRB_MSGIN)) {
2980 		srb->state &= ~SRB_DISCONNECT;
2981 		srb->state |= SRB_MSGIN;
2982 	}
2983 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
2984 	/* SCSI command */
2985 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
2986 }
2987 
2988 
2989 static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2990 		u16 *pscsi_status)
2991 {
2992 }
2993 
2994 
2995 static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
2996 		u16 *pscsi_status)
2997 {
2998 }
2999 
3000 
3001 static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
3002 {
3003 	struct DeviceCtlBlk *i;
3004 
3005 	/* set all lun device's  period, offset */
3006 	if (dcb->identify_msg & 0x07)
3007 		return;
3008 
3009 	if (acb->scan_devices) {
3010 		current_sync_offset = dcb->sync_offset;
3011 		return;
3012 	}
3013 
3014 	list_for_each_entry(i, &acb->dcb_list, list)
3015 		if (i->target_id == dcb->target_id) {
3016 			i->sync_period = dcb->sync_period;
3017 			i->sync_offset = dcb->sync_offset;
3018 			i->sync_mode = dcb->sync_mode;
3019 			i->min_nego_period = dcb->min_nego_period;
3020 		}
3021 }
3022 
3023 
3024 static void disconnect(struct AdapterCtlBlk *acb)
3025 {
3026 	struct DeviceCtlBlk *dcb = acb->active_dcb;
3027 	struct ScsiReqBlk *srb;
3028 
3029 	if (!dcb) {
3030 		dprintkl(KERN_ERR, "disconnect: No such device\n");
3031 		udelay(500);
3032 		/* Suspend queue for a while */
3033 		acb->scsi_host->last_reset =
3034 		    jiffies + HZ / 2 +
3035 		    HZ * acb->eeprom.delay_time;
3036 		clear_fifo(acb, "disconnectEx");
3037 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3038 		return;
3039 	}
3040 	srb = dcb->active_srb;
3041 	acb->active_dcb = NULL;
3042 	dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->serial_number);
3043 
3044 	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
3045 	clear_fifo(acb, "disconnect");
3046 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
3047 	if (srb->state & SRB_UNEXPECT_RESEL) {
3048 		dprintkl(KERN_ERR,
3049 			"disconnect: Unexpected reselection <%02i-%i>\n",
3050 			dcb->target_id, dcb->target_lun);
3051 		srb->state = 0;
3052 		waiting_process_next(acb);
3053 	} else if (srb->state & SRB_ABORT_SENT) {
3054 		dcb->flag &= ~ABORT_DEV_;
3055 		acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
3056 		dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
3057 		doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
3058 		waiting_process_next(acb);
3059 	} else {
3060 		if ((srb->state & (SRB_START_ + SRB_MSGOUT))
3061 		    || !(srb->
3062 			 state & (SRB_DISCONNECT + SRB_COMPLETED))) {
3063 			/*
3064 			 * Selection time out
3065 			 * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
3066 			 */
3067 			/* Unexp. Disc / Sel Timeout */
3068 			if (srb->state != SRB_START_
3069 			    && srb->state != SRB_MSGOUT) {
3070 				srb->state = SRB_READY;
3071 				dprintkl(KERN_DEBUG,
3072 					"disconnect: (pid#%li) Unexpected\n",
3073 					srb->cmd->serial_number);
3074 				srb->target_status = SCSI_STAT_SEL_TIMEOUT;
3075 				goto disc1;
3076 			} else {
3077 				/* Normal selection timeout */
3078 				dprintkdbg(DBG_KG, "disconnect: (pid#%li) "
3079 					"<%02i-%i> SelTO\n", srb->cmd->serial_number,
3080 					dcb->target_id, dcb->target_lun);
3081 				if (srb->retry_count++ > DC395x_MAX_RETRIES
3082 				    || acb->scan_devices) {
3083 					srb->target_status =
3084 					    SCSI_STAT_SEL_TIMEOUT;
3085 					goto disc1;
3086 				}
3087 				free_tag(dcb, srb);
3088 				srb_going_to_waiting_move(dcb, srb);
3089 				dprintkdbg(DBG_KG,
3090 					"disconnect: (pid#%li) Retry\n",
3091 					srb->cmd->serial_number);
3092 				waiting_set_timer(acb, HZ / 20);
3093 			}
3094 		} else if (srb->state & SRB_DISCONNECT) {
3095 			u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
3096 			/*
3097 			 * SRB_DISCONNECT (This is what we expect!)
3098 			 */
3099 			if (bval & 0x40) {
3100 				dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
3101 					" 0x%02x: ACK set! Other controllers?\n",
3102 					bval);
3103 				/* It could come from another initiator, therefore don't do much ! */
3104 			} else
3105 				waiting_process_next(acb);
3106 		} else if (srb->state & SRB_COMPLETED) {
3107 		      disc1:
3108 			/*
3109 			 ** SRB_COMPLETED
3110 			 */
3111 			free_tag(dcb, srb);
3112 			dcb->active_srb = NULL;
3113 			srb->state = SRB_FREE;
3114 			srb_done(acb, dcb, srb);
3115 		}
3116 	}
3117 }
3118 
3119 
3120 static void reselect(struct AdapterCtlBlk *acb)
3121 {
3122 	struct DeviceCtlBlk *dcb = acb->active_dcb;
3123 	struct ScsiReqBlk *srb = NULL;
3124 	u16 rsel_tar_lun_id;
3125 	u8 id, lun;
3126 	u8 arblostflag = 0;
3127 	dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
3128 
3129 	clear_fifo(acb, "reselect");
3130 	/*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
3131 	/* Read Reselected Target ID and LUN */
3132 	rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
3133 	if (dcb) {		/* Arbitration lost but Reselection win */
3134 		srb = dcb->active_srb;
3135 		if (!srb) {
3136 			dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
3137 				"but active_srb == NULL\n");
3138 			DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
3139 			return;
3140 		}
3141 		/* Why the if ? */
3142 		if (!acb->scan_devices) {
3143 			dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> "
3144 				"Arb lost but Resel win rsel=%i stat=0x%04x\n",
3145 				srb->cmd->serial_number, dcb->target_id,
3146 				dcb->target_lun, rsel_tar_lun_id,
3147 				DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
3148 			arblostflag = 1;
3149 			/*srb->state |= SRB_DISCONNECT; */
3150 
3151 			srb->state = SRB_READY;
3152 			free_tag(dcb, srb);
3153 			srb_going_to_waiting_move(dcb, srb);
3154 			waiting_set_timer(acb, HZ / 20);
3155 
3156 			/* return; */
3157 		}
3158 	}
3159 	/* Read Reselected Target Id and LUN */
3160 	if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
3161 		dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
3162 			"Got %i!\n", rsel_tar_lun_id);
3163 	id = rsel_tar_lun_id & 0xff;
3164 	lun = (rsel_tar_lun_id >> 8) & 7;
3165 	dcb = find_dcb(acb, id, lun);
3166 	if (!dcb) {
3167 		dprintkl(KERN_ERR, "reselect: From non existent device "
3168 			"<%02i-%i>\n", id, lun);
3169 		DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);	/* it's important for atn stop */
3170 		return;
3171 	}
3172 	acb->active_dcb = dcb;
3173 
3174 	if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
3175 		dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
3176 			"disconnection? <%02i-%i>\n",
3177 			dcb->target_id, dcb->target_lun);
3178 
3179 	if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
3180 		srb = acb->tmp_srb;
3181 		dcb->active_srb = srb;
3182 	} else {
3183 		/* There can be only one! */
3184 		srb = dcb->active_srb;
3185 		if (!srb || !(srb->state & SRB_DISCONNECT)) {
3186 			/*
3187 			 * abort command
3188 			 */
3189 			dprintkl(KERN_DEBUG,
3190 				"reselect: w/o disconnected cmds <%02i-%i>\n",
3191 				dcb->target_id, dcb->target_lun);
3192 			srb = acb->tmp_srb;
3193 			srb->state = SRB_UNEXPECT_RESEL;
3194 			dcb->active_srb = srb;
3195 			enable_msgout_abort(acb, srb);
3196 		} else {
3197 			if (dcb->flag & ABORT_DEV_) {
3198 				/*srb->state = SRB_ABORT_SENT; */
3199 				enable_msgout_abort(acb, srb);
3200 			} else
3201 				srb->state = SRB_DATA_XFER;
3202 
3203 		}
3204 	}
3205 	srb->scsi_phase = PH_BUS_FREE;	/* initial phase */
3206 
3207 	/* Program HA ID, target ID, period and offset */
3208 	dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
3209 	DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);	/* host   ID */
3210 	DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);		/* target ID */
3211 	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);		/* offset    */
3212 	DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);		/* sync period, wide */
3213 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);		/* it's important for atn stop */
3214 	/* SCSI command */
3215 	DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
3216 }
3217 
3218 
3219 static inline u8 tagq_blacklist(char *name)
3220 {
3221 #ifndef DC395x_NO_TAGQ
3222 #if 0
3223 	u8 i;
3224 	for (i = 0; i < BADDEVCNT; i++)
3225 		if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
3226 			return 1;
3227 #endif
3228 	return 0;
3229 #else
3230 	return 1;
3231 #endif
3232 }
3233 
3234 
3235 static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
3236 {
3237 	/* Check for SCSI format (ANSI and Response data format) */
3238 	if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
3239 		if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
3240 		    && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
3241 		    /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
3242 		    /* ((dcb->dev_type == TYPE_DISK)
3243 		       || (dcb->dev_type == TYPE_MOD)) && */
3244 		    !tagq_blacklist(((char *)ptr) + 8)) {
3245 			if (dcb->max_command == 1)
3246 				dcb->max_command =
3247 				    dcb->acb->tag_max_num;
3248 			dcb->sync_mode |= EN_TAG_QUEUEING;
3249 			/*dcb->tag_mask = 0; */
3250 		} else
3251 			dcb->max_command = 1;
3252 	}
3253 }
3254 
3255 
3256 static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3257 		struct ScsiInqData *ptr)
3258 {
3259 	u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
3260 	dcb->dev_type = bval1;
3261 	/* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
3262 	disc_tagq_set(dcb, ptr);
3263 }
3264 
3265 
3266 /* unmap mapped pci regions from SRB */
3267 static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
3268 {
3269 	struct scsi_cmnd *cmd = srb->cmd;
3270 	enum dma_data_direction dir = cmd->sc_data_direction;
3271 
3272 	if (scsi_sg_count(cmd) && dir != PCI_DMA_NONE) {
3273 		/* unmap DC395x SG list */
3274 		dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
3275 			srb->sg_bus_addr, SEGMENTX_LEN);
3276 		pci_unmap_single(acb->dev, srb->sg_bus_addr,
3277 				 SEGMENTX_LEN,
3278 				 PCI_DMA_TODEVICE);
3279 		dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
3280 			   scsi_sg_count(cmd), scsi_bufflen(cmd));
3281 		/* unmap the sg segments */
3282 		scsi_dma_unmap(cmd);
3283 	}
3284 }
3285 
3286 
3287 /* unmap mapped pci sense buffer from SRB */
3288 static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
3289 		struct ScsiReqBlk *srb)
3290 {
3291 	if (!(srb->flag & AUTO_REQSENSE))
3292 		return;
3293 	/* Unmap sense buffer */
3294 	dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
3295 	       srb->segment_x[0].address);
3296 	pci_unmap_single(acb->dev, srb->segment_x[0].address,
3297 			 srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
3298 	/* Restore SG stuff */
3299 	srb->total_xfer_length = srb->xferred;
3300 	srb->segment_x[0].address =
3301 	    srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
3302 	srb->segment_x[0].length =
3303 	    srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
3304 }
3305 
3306 
3307 /*
3308  * Complete execution of a SCSI command
3309  * Signal completion to the generic SCSI driver
3310  */
3311 static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3312 		struct ScsiReqBlk *srb)
3313 {
3314 	u8 tempcnt, status;
3315 	struct scsi_cmnd *cmd = srb->cmd;
3316 	enum dma_data_direction dir = cmd->sc_data_direction;
3317 	int ckc_only = 1;
3318 
3319 	dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->serial_number,
3320 		srb->cmd->device->id, srb->cmd->device->lun);
3321 	dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
3322 		   srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count,
3323 		   scsi_sgtalbe(cmd));
3324 	status = srb->target_status;
3325 	if (srb->flag & AUTO_REQSENSE) {
3326 		dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
3327 		pci_unmap_srb_sense(acb, srb);
3328 		/*
3329 		 ** target status..........................
3330 		 */
3331 		srb->flag &= ~AUTO_REQSENSE;
3332 		srb->adapter_status = 0;
3333 		srb->target_status = CHECK_CONDITION << 1;
3334 		if (debug_enabled(DBG_1)) {
3335 			switch (cmd->sense_buffer[2] & 0x0f) {
3336 			case NOT_READY:
3337 				dprintkl(KERN_DEBUG,
3338 				     "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3339 				     cmd->cmnd[0], dcb->target_id,
3340 				     dcb->target_lun, status, acb->scan_devices);
3341 				break;
3342 			case UNIT_ATTENTION:
3343 				dprintkl(KERN_DEBUG,
3344 				     "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3345 				     cmd->cmnd[0], dcb->target_id,
3346 				     dcb->target_lun, status, acb->scan_devices);
3347 				break;
3348 			case ILLEGAL_REQUEST:
3349 				dprintkl(KERN_DEBUG,
3350 				     "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3351 				     cmd->cmnd[0], dcb->target_id,
3352 				     dcb->target_lun, status, acb->scan_devices);
3353 				break;
3354 			case MEDIUM_ERROR:
3355 				dprintkl(KERN_DEBUG,
3356 				     "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3357 				     cmd->cmnd[0], dcb->target_id,
3358 				     dcb->target_lun, status, acb->scan_devices);
3359 				break;
3360 			case HARDWARE_ERROR:
3361 				dprintkl(KERN_DEBUG,
3362 				     "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
3363 				     cmd->cmnd[0], dcb->target_id,
3364 				     dcb->target_lun, status, acb->scan_devices);
3365 				break;
3366 			}
3367 			if (cmd->sense_buffer[7] >= 6)
3368 				printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
3369 					"(0x%08x 0x%08x)\n",
3370 					cmd->sense_buffer[2], cmd->sense_buffer[12],
3371 					cmd->sense_buffer[13],
3372 					*((unsigned int *)(cmd->sense_buffer + 3)),
3373 					*((unsigned int *)(cmd->sense_buffer + 8)));
3374 			else
3375 				printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
3376 					cmd->sense_buffer[2],
3377 					*((unsigned int *)(cmd->sense_buffer + 3)));
3378 		}
3379 
3380 		if (status == (CHECK_CONDITION << 1)) {
3381 			cmd->result = DID_BAD_TARGET << 16;
3382 			goto ckc_e;
3383 		}
3384 		dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
3385 
3386 		if (srb->total_xfer_length
3387 		    && srb->total_xfer_length >= cmd->underflow)
3388 			cmd->result =
3389 			    MK_RES_LNX(DRIVER_SENSE, DID_OK,
3390 				       srb->end_message, CHECK_CONDITION);
3391 		/*SET_RES_DID(cmd->result,DID_OK) */
3392 		else
3393 			cmd->result =
3394 			    MK_RES_LNX(DRIVER_SENSE, DID_OK,
3395 				       srb->end_message, CHECK_CONDITION);
3396 
3397 		goto ckc_e;
3398 	}
3399 
3400 /*************************************************************/
3401 	if (status) {
3402 		/*
3403 		 * target status..........................
3404 		 */
3405 		if (status_byte(status) == CHECK_CONDITION) {
3406 			request_sense(acb, dcb, srb);
3407 			return;
3408 		} else if (status_byte(status) == QUEUE_FULL) {
3409 			tempcnt = (u8)list_size(&dcb->srb_going_list);
3410 			dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
3411 			     dcb->target_id, dcb->target_lun, tempcnt);
3412 			if (tempcnt > 1)
3413 				tempcnt--;
3414 			dcb->max_command = tempcnt;
3415 			free_tag(dcb, srb);
3416 			srb_going_to_waiting_move(dcb, srb);
3417 			waiting_set_timer(acb, HZ / 20);
3418 			srb->adapter_status = 0;
3419 			srb->target_status = 0;
3420 			return;
3421 		} else if (status == SCSI_STAT_SEL_TIMEOUT) {
3422 			srb->adapter_status = H_SEL_TIMEOUT;
3423 			srb->target_status = 0;
3424 			cmd->result = DID_NO_CONNECT << 16;
3425 		} else {
3426 			srb->adapter_status = 0;
3427 			SET_RES_DID(cmd->result, DID_ERROR);
3428 			SET_RES_MSG(cmd->result, srb->end_message);
3429 			SET_RES_TARGET(cmd->result, status);
3430 
3431 		}
3432 	} else {
3433 		/*
3434 		 ** process initiator status..........................
3435 		 */
3436 		status = srb->adapter_status;
3437 		if (status & H_OVER_UNDER_RUN) {
3438 			srb->target_status = 0;
3439 			SET_RES_DID(cmd->result, DID_OK);
3440 			SET_RES_MSG(cmd->result, srb->end_message);
3441 		} else if (srb->status & PARITY_ERROR) {
3442 			SET_RES_DID(cmd->result, DID_PARITY);
3443 			SET_RES_MSG(cmd->result, srb->end_message);
3444 		} else {	/* No error */
3445 
3446 			srb->adapter_status = 0;
3447 			srb->target_status = 0;
3448 			SET_RES_DID(cmd->result, DID_OK);
3449 		}
3450 	}
3451 
3452 	if (dir != PCI_DMA_NONE && scsi_sg_count(cmd))
3453 		pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd),
3454 					scsi_sg_count(cmd), dir);
3455 
3456 	ckc_only = 0;
3457 /* Check Error Conditions */
3458       ckc_e:
3459 
3460 	if (cmd->cmnd[0] == INQUIRY) {
3461 		unsigned char *base = NULL;
3462 		struct ScsiInqData *ptr;
3463 		unsigned long flags = 0;
3464 		struct scatterlist* sg = scsi_sglist(cmd);
3465 		size_t offset = 0, len = sizeof(struct ScsiInqData);
3466 
3467 		local_irq_save(flags);
3468 		base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len);
3469 		ptr = (struct ScsiInqData *)(base + offset);
3470 
3471 		if (!ckc_only && (cmd->result & RES_DID) == 0
3472 		    && cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8
3473 		    && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
3474 			dcb->inquiry7 = ptr->Flags;
3475 
3476 	/*if( srb->cmd->cmnd[0] == INQUIRY && */
3477 	/*  (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
3478 		if ((cmd->result == (DID_OK << 16)
3479 		     || status_byte(cmd->result) &
3480 		     CHECK_CONDITION)) {
3481 			if (!dcb->init_tcq_flag) {
3482 				add_dev(acb, dcb, ptr);
3483 				dcb->init_tcq_flag = 1;
3484 			}
3485 		}
3486 
3487 		scsi_kunmap_atomic_sg(base);
3488 		local_irq_restore(flags);
3489 	}
3490 
3491 	/* Here is the info for Doug Gilbert's sg3 ... */
3492 	scsi_set_resid(cmd, srb->total_xfer_length);
3493 	/* This may be interpreted by sb. or not ... */
3494 	cmd->SCp.this_residual = srb->total_xfer_length;
3495 	cmd->SCp.buffers_residual = 0;
3496 	if (debug_enabled(DBG_KG)) {
3497 		if (srb->total_xfer_length)
3498 			dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> "
3499 				"cmnd=0x%02x Missed %i bytes\n",
3500 				cmd->serial_number, cmd->device->id, cmd->device->lun,
3501 				cmd->cmnd[0], srb->total_xfer_length);
3502 	}
3503 
3504 	srb_going_remove(dcb, srb);
3505 	/* Add to free list */
3506 	if (srb == acb->tmp_srb)
3507 		dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
3508 	else {
3509 		dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n",
3510 			cmd->serial_number, cmd->result);
3511 		srb_free_insert(acb, srb);
3512 	}
3513 	pci_unmap_srb(acb, srb);
3514 
3515 	cmd->scsi_done(cmd);
3516 	waiting_process_next(acb);
3517 }
3518 
3519 
3520 /* abort all cmds in our queues */
3521 static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
3522 		struct scsi_cmnd *cmd, u8 force)
3523 {
3524 	struct DeviceCtlBlk *dcb;
3525 	dprintkl(KERN_INFO, "doing_srb_done: pids ");
3526 
3527 	list_for_each_entry(dcb, &acb->dcb_list, list) {
3528 		struct ScsiReqBlk *srb;
3529 		struct ScsiReqBlk *tmp;
3530 		struct scsi_cmnd *p;
3531 
3532 		list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
3533 			enum dma_data_direction dir;
3534 			int result;
3535 
3536 			p = srb->cmd;
3537 			dir = p->sc_data_direction;
3538 			result = MK_RES(0, did_flag, 0, 0);
3539 			printk("G:%li(%02i-%i) ", p->serial_number,
3540 			       p->device->id, p->device->lun);
3541 			srb_going_remove(dcb, srb);
3542 			free_tag(dcb, srb);
3543 			srb_free_insert(acb, srb);
3544 			p->result = result;
3545 			pci_unmap_srb_sense(acb, srb);
3546 			pci_unmap_srb(acb, srb);
3547 			if (force) {
3548 				/* For new EH, we normally don't need to give commands back,
3549 				 * as they all complete or all time out */
3550 				p->scsi_done(p);
3551 			}
3552 		}
3553 		if (!list_empty(&dcb->srb_going_list))
3554 			dprintkl(KERN_DEBUG,
3555 			       "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
3556 			       dcb->target_id, dcb->target_lun);
3557 		if (dcb->tag_mask)
3558 			dprintkl(KERN_DEBUG,
3559 			       "tag_mask for <%02i-%i> should be empty, is %08x!\n",
3560 			       dcb->target_id, dcb->target_lun,
3561 			       dcb->tag_mask);
3562 
3563 		/* Waiting queue */
3564 		list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
3565 			int result;
3566 			p = srb->cmd;
3567 
3568 			result = MK_RES(0, did_flag, 0, 0);
3569 			printk("W:%li<%02i-%i>", p->serial_number, p->device->id,
3570 			       p->device->lun);
3571 			srb_waiting_remove(dcb, srb);
3572 			srb_free_insert(acb, srb);
3573 			p->result = result;
3574 			pci_unmap_srb_sense(acb, srb);
3575 			pci_unmap_srb(acb, srb);
3576 			if (force) {
3577 				/* For new EH, we normally don't need to give commands back,
3578 				 * as they all complete or all time out */
3579 				cmd->scsi_done(cmd);
3580 			}
3581 		}
3582 		if (!list_empty(&dcb->srb_waiting_list))
3583 			dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
3584 			     list_size(&dcb->srb_waiting_list), dcb->target_id,
3585 			     dcb->target_lun);
3586 		dcb->flag &= ~ABORT_DEV_;
3587 	}
3588 	printk("\n");
3589 }
3590 
3591 
3592 static void reset_scsi_bus(struct AdapterCtlBlk *acb)
3593 {
3594 	dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
3595 	acb->acb_flag |= RESET_DEV;	/* RESET_DETECT, RESET_DONE, RESET_DEV */
3596 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
3597 
3598 	while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
3599 		/* nothing */;
3600 }
3601 
3602 
3603 static void set_basic_config(struct AdapterCtlBlk *acb)
3604 {
3605 	u8 bval;
3606 	u16 wval;
3607 	DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
3608 	if (acb->config & HCC_PARITY)
3609 		bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
3610 	else
3611 		bval = PHASELATCH | INITIATOR | BLOCKRST;
3612 
3613 	DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
3614 
3615 	/* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
3616 	DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03);	/* was 0x13: default */
3617 	/* program Host ID                  */
3618 	DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
3619 	/* set ansynchronous transfer       */
3620 	DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
3621 	/* Turn LED control off */
3622 	wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
3623 	DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
3624 	/* DMA config          */
3625 	wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
3626 	wval |=
3627 	    DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
3628 	DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
3629 	/* Clear pending interrupt status */
3630 	DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
3631 	/* Enable SCSI interrupt    */
3632 	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
3633 	DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
3634 		      /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
3635 		      );
3636 }
3637 
3638 
3639 static void scsi_reset_detect(struct AdapterCtlBlk *acb)
3640 {
3641 	dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
3642 	/* delay half a second */
3643 	if (timer_pending(&acb->waiting_timer))
3644 		del_timer(&acb->waiting_timer);
3645 
3646 	DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
3647 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
3648 	/*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
3649 	udelay(500);
3650 	/* Maybe we locked up the bus? Then lets wait even longer ... */
3651 	acb->scsi_host->last_reset =
3652 	    jiffies + 5 * HZ / 2 +
3653 	    HZ * acb->eeprom.delay_time;
3654 
3655 	clear_fifo(acb, "scsi_reset_detect");
3656 	set_basic_config(acb);
3657 	/*1.25 */
3658 	/*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
3659 
3660 	if (acb->acb_flag & RESET_DEV) {	/* RESET_DETECT, RESET_DONE, RESET_DEV */
3661 		acb->acb_flag |= RESET_DONE;
3662 	} else {
3663 		acb->acb_flag |= RESET_DETECT;
3664 		reset_dev_param(acb);
3665 		doing_srb_done(acb, DID_RESET, NULL, 1);
3666 		/*DC395x_RecoverSRB( acb ); */
3667 		acb->active_dcb = NULL;
3668 		acb->acb_flag = 0;
3669 		waiting_process_next(acb);
3670 	}
3671 }
3672 
3673 
3674 static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
3675 		struct ScsiReqBlk *srb)
3676 {
3677 	struct scsi_cmnd *cmd = srb->cmd;
3678 	dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n",
3679 		cmd->serial_number, cmd->device->id, cmd->device->lun);
3680 
3681 	srb->flag |= AUTO_REQSENSE;
3682 	srb->adapter_status = 0;
3683 	srb->target_status = 0;
3684 
3685 	/* KG: Can this prevent crap sense data ? */
3686 	memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
3687 
3688 	/* Save some data */
3689 	srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
3690 	    srb->segment_x[0].address;
3691 	srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
3692 	    srb->segment_x[0].length;
3693 	srb->xferred = srb->total_xfer_length;
3694 	/* srb->segment_x : a one entry of S/G list table */
3695 	srb->total_xfer_length = SCSI_SENSE_BUFFERSIZE;
3696 	srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE;
3697 	/* Map sense buffer */
3698 	srb->segment_x[0].address =
3699 	    pci_map_single(acb->dev, cmd->sense_buffer,
3700 			   SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
3701 	dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
3702 	       cmd->sense_buffer, srb->segment_x[0].address,
3703 	       SCSI_SENSE_BUFFERSIZE);
3704 	srb->sg_count = 1;
3705 	srb->sg_index = 0;
3706 
3707 	if (start_scsi(acb, dcb, srb)) {	/* Should only happen, if sb. else grabs the bus */
3708 		dprintkl(KERN_DEBUG,
3709 			"request_sense: (pid#%li) failed <%02i-%i>\n",
3710 			srb->cmd->serial_number, dcb->target_id, dcb->target_lun);
3711 		srb_going_to_waiting_move(dcb, srb);
3712 		waiting_set_timer(acb, HZ / 100);
3713 	}
3714 }
3715 
3716 
3717 /**
3718  * device_alloc - Allocate a new device instance. This create the
3719  * devices instance and sets up all the data items. The adapter
3720  * instance is required to obtain confiuration information for this
3721  * device. This does *not* add this device to the adapters device
3722  * list.
3723  *
3724  * @acb: The adapter to obtain configuration information from.
3725  * @target: The target for the new device.
3726  * @lun: The lun for the new device.
3727  *
3728  * Return the new device if successful or NULL on failure.
3729  **/
3730 static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
3731 		u8 target, u8 lun)
3732 {
3733 	struct NvRamType *eeprom = &acb->eeprom;
3734 	u8 period_index = eeprom->target[target].period & 0x07;
3735 	struct DeviceCtlBlk *dcb;
3736 
3737 	dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
3738 	dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
3739 	if (!dcb)
3740 		return NULL;
3741 	dcb->acb = NULL;
3742 	INIT_LIST_HEAD(&dcb->srb_going_list);
3743 	INIT_LIST_HEAD(&dcb->srb_waiting_list);
3744 	dcb->active_srb = NULL;
3745 	dcb->tag_mask = 0;
3746 	dcb->max_command = 1;
3747 	dcb->target_id = target;
3748 	dcb->target_lun = lun;
3749 #ifndef DC395x_NO_DISCONNECT
3750 	dcb->identify_msg =
3751 	    IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
3752 #else
3753 	dcb->identify_msg = IDENTIFY(0, lun);
3754 #endif
3755 	dcb->dev_mode = eeprom->target[target].cfg0;
3756 	dcb->inquiry7 = 0;
3757 	dcb->sync_mode = 0;
3758 	dcb->min_nego_period = clock_period[period_index];
3759 	dcb->sync_period = 0;
3760 	dcb->sync_offset = 0;
3761 	dcb->flag = 0;
3762 
3763 #ifndef DC395x_NO_WIDE
3764 	if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
3765 	    && (acb->config & HCC_WIDE_CARD))
3766 		dcb->sync_mode |= WIDE_NEGO_ENABLE;
3767 #endif
3768 #ifndef DC395x_NO_SYNC
3769 	if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
3770 		if (!(lun) || current_sync_offset)
3771 			dcb->sync_mode |= SYNC_NEGO_ENABLE;
3772 #endif
3773 	if (dcb->target_lun != 0) {
3774 		/* Copy settings */
3775 		struct DeviceCtlBlk *p;
3776 		list_for_each_entry(p, &acb->dcb_list, list)
3777 			if (p->target_id == dcb->target_id)
3778 				break;
3779 		dprintkdbg(DBG_1,
3780 		       "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
3781 		       dcb->target_id, dcb->target_lun,
3782 		       p->target_id, p->target_lun);
3783 		dcb->sync_mode = p->sync_mode;
3784 		dcb->sync_period = p->sync_period;
3785 		dcb->min_nego_period = p->min_nego_period;
3786 		dcb->sync_offset = p->sync_offset;
3787 		dcb->inquiry7 = p->inquiry7;
3788 	}
3789 	return dcb;
3790 }
3791 
3792 
3793 /**
3794  * adapter_add_device - Adds the device instance to the adaptor instance.
3795  *
3796  * @acb: The adapter device to be updated
3797  * @dcb: A newly created and intialised device instance to add.
3798  **/
3799 static void adapter_add_device(struct AdapterCtlBlk *acb,
3800 		struct DeviceCtlBlk *dcb)
3801 {
3802 	/* backpointer to adapter */
3803 	dcb->acb = acb;
3804 
3805 	/* set run_robin to this device if it is currently empty */
3806 	if (list_empty(&acb->dcb_list))
3807 		acb->dcb_run_robin = dcb;
3808 
3809 	/* add device to list */
3810 	list_add_tail(&dcb->list, &acb->dcb_list);
3811 
3812 	/* update device maps */
3813 	acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
3814 	acb->children[dcb->target_id][dcb->target_lun] = dcb;
3815 }
3816 
3817 
3818 /**
3819  * adapter_remove_device - Removes the device instance from the adaptor
3820  * instance. The device instance is not check in any way or freed by this.
3821  * The caller is expected to take care of that. This will simply remove the
3822  * device from the adapters data strcutures.
3823  *
3824  * @acb: The adapter device to be updated
3825  * @dcb: A device that has previously been added to the adapter.
3826  **/
3827 static void adapter_remove_device(struct AdapterCtlBlk *acb,
3828 		struct DeviceCtlBlk *dcb)
3829 {
3830 	struct DeviceCtlBlk *i;
3831 	struct DeviceCtlBlk *tmp;
3832 	dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
3833 		dcb->target_id, dcb->target_lun);
3834 
3835 	/* fix up any pointers to this device that we have in the adapter */
3836 	if (acb->active_dcb == dcb)
3837 		acb->active_dcb = NULL;
3838 	if (acb->dcb_run_robin == dcb)
3839 		acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
3840 
3841 	/* unlink from list */
3842 	list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
3843 		if (dcb == i) {
3844 			list_del(&i->list);
3845 			break;
3846 		}
3847 
3848 	/* clear map and children */
3849 	acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
3850 	acb->children[dcb->target_id][dcb->target_lun] = NULL;
3851 	dcb->acb = NULL;
3852 }
3853 
3854 
3855 /**
3856  * adapter_remove_and_free_device - Removes a single device from the adapter
3857  * and then frees the device information.
3858  *
3859  * @acb: The adapter device to be updated
3860  * @dcb: A device that has previously been added to the adapter.
3861  */
3862 static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
3863 		struct DeviceCtlBlk *dcb)
3864 {
3865 	if (list_size(&dcb->srb_going_list) > 1) {
3866 		dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
3867 		           "Won't remove because of %i active requests.\n",
3868 			   dcb->target_id, dcb->target_lun,
3869 			   list_size(&dcb->srb_going_list));
3870 		return;
3871 	}
3872 	adapter_remove_device(acb, dcb);
3873 	kfree(dcb);
3874 }
3875 
3876 
3877 /**
3878  * adapter_remove_and_free_all_devices - Removes and frees all of the
3879  * devices associated with the specified adapter.
3880  *
3881  * @acb: The adapter from which all devices should be removed.
3882  **/
3883 static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
3884 {
3885 	struct DeviceCtlBlk *dcb;
3886 	struct DeviceCtlBlk *tmp;
3887 	dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
3888 		   list_size(&acb->dcb_list));
3889 
3890 	list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
3891 		adapter_remove_and_free_device(acb, dcb);
3892 }
3893 
3894 
3895 /**
3896  * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
3897  * scsi device that we need to deal with. We allocate a new device and then
3898  * insert that device into the adapters device list.
3899  *
3900  * @scsi_device: The new scsi device that we need to handle.
3901  **/
3902 static int dc395x_slave_alloc(struct scsi_device *scsi_device)
3903 {
3904 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3905 	struct DeviceCtlBlk *dcb;
3906 
3907 	dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
3908 	if (!dcb)
3909 		return -ENOMEM;
3910 	adapter_add_device(acb, dcb);
3911 
3912 	return 0;
3913 }
3914 
3915 
3916 /**
3917  * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
3918  * device that is going away.
3919  *
3920  * @scsi_device: The new scsi device that we need to handle.
3921  **/
3922 static void dc395x_slave_destroy(struct scsi_device *scsi_device)
3923 {
3924 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
3925 	struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
3926 	if (dcb)
3927 		adapter_remove_and_free_device(acb, dcb);
3928 }
3929 
3930 
3931 
3932 
3933 /**
3934  * trms1040_wait_30us: wait for 30 us
3935  *
3936  * Waits for 30us (using the chip by the looks of it..)
3937  *
3938  * @io_port: base I/O address
3939  **/
3940 static void __devinit trms1040_wait_30us(unsigned long io_port)
3941 {
3942 	/* ScsiPortStallExecution(30); wait 30 us */
3943 	outb(5, io_port + TRM_S1040_GEN_TIMER);
3944 	while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
3945 		/* nothing */ ;
3946 }
3947 
3948 
3949 /**
3950  * trms1040_write_cmd - write the secified command and address to
3951  * chip
3952  *
3953  * @io_port:	base I/O address
3954  * @cmd:	SB + op code (command) to send
3955  * @addr:	address to send
3956  **/
3957 static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
3958 {
3959 	int i;
3960 	u8 send_data;
3961 
3962 	/* program SB + OP code */
3963 	for (i = 0; i < 3; i++, cmd <<= 1) {
3964 		send_data = NVR_SELECT;
3965 		if (cmd & 0x04)	/* Start from bit 2 */
3966 			send_data |= NVR_BITOUT;
3967 
3968 		outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3969 		trms1040_wait_30us(io_port);
3970 		outb((send_data | NVR_CLOCK),
3971 		     io_port + TRM_S1040_GEN_NVRAM);
3972 		trms1040_wait_30us(io_port);
3973 	}
3974 
3975 	/* send address */
3976 	for (i = 0; i < 7; i++, addr <<= 1) {
3977 		send_data = NVR_SELECT;
3978 		if (addr & 0x40)	/* Start from bit 6 */
3979 			send_data |= NVR_BITOUT;
3980 
3981 		outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
3982 		trms1040_wait_30us(io_port);
3983 		outb((send_data | NVR_CLOCK),
3984 		     io_port + TRM_S1040_GEN_NVRAM);
3985 		trms1040_wait_30us(io_port);
3986 	}
3987 	outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
3988 	trms1040_wait_30us(io_port);
3989 }
3990 
3991 
3992 /**
3993  * trms1040_set_data - store a single byte in the eeprom
3994  *
3995  * Called from write all to write a single byte into the SSEEPROM
3996  * Which is done one bit at a time.
3997  *
3998  * @io_port:	base I/O address
3999  * @addr:	offset into EEPROM
4000  * @byte:	bytes to write
4001  **/
4002 static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
4003 {
4004 	int i;
4005 	u8 send_data;
4006 
4007 	/* Send write command & address */
4008 	trms1040_write_cmd(io_port, 0x05, addr);
4009 
4010 	/* Write data */
4011 	for (i = 0; i < 8; i++, byte <<= 1) {
4012 		send_data = NVR_SELECT;
4013 		if (byte & 0x80)	/* Start from bit 7 */
4014 			send_data |= NVR_BITOUT;
4015 
4016 		outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
4017 		trms1040_wait_30us(io_port);
4018 		outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4019 		trms1040_wait_30us(io_port);
4020 	}
4021 	outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4022 	trms1040_wait_30us(io_port);
4023 
4024 	/* Disable chip select */
4025 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
4026 	trms1040_wait_30us(io_port);
4027 
4028 	outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4029 	trms1040_wait_30us(io_port);
4030 
4031 	/* Wait for write ready */
4032 	while (1) {
4033 		outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4034 		trms1040_wait_30us(io_port);
4035 
4036 		outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4037 		trms1040_wait_30us(io_port);
4038 
4039 		if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
4040 			break;
4041 	}
4042 
4043 	/*  Disable chip select */
4044 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
4045 }
4046 
4047 
4048 /**
4049  * trms1040_write_all - write 128 bytes to the eeprom
4050  *
4051  * Write the supplied 128 bytes to the chips SEEPROM
4052  *
4053  * @eeprom:	the data to write
4054  * @io_port:	the base io port
4055  **/
4056 static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
4057 {
4058 	u8 *b_eeprom = (u8 *)eeprom;
4059 	u8 addr;
4060 
4061 	/* Enable SEEPROM */
4062 	outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4063 	     io_port + TRM_S1040_GEN_CONTROL);
4064 
4065 	/* write enable */
4066 	trms1040_write_cmd(io_port, 0x04, 0xFF);
4067 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
4068 	trms1040_wait_30us(io_port);
4069 
4070 	/* write */
4071 	for (addr = 0; addr < 128; addr++, b_eeprom++)
4072 		trms1040_set_data(io_port, addr, *b_eeprom);
4073 
4074 	/* write disable */
4075 	trms1040_write_cmd(io_port, 0x04, 0x00);
4076 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
4077 	trms1040_wait_30us(io_port);
4078 
4079 	/* Disable SEEPROM */
4080 	outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4081 	     io_port + TRM_S1040_GEN_CONTROL);
4082 }
4083 
4084 
4085 /**
4086  * trms1040_get_data - get a single byte from the eeprom
4087  *
4088  * Called from read all to read a single byte into the SSEEPROM
4089  * Which is done one bit at a time.
4090  *
4091  * @io_port:	base I/O address
4092  * @addr:	offset into SEEPROM
4093  *
4094  * Returns the byte read.
4095  **/
4096 static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
4097 {
4098 	int i;
4099 	u8 read_byte;
4100 	u8 result = 0;
4101 
4102 	/* Send read command & address */
4103 	trms1040_write_cmd(io_port, 0x06, addr);
4104 
4105 	/* read data */
4106 	for (i = 0; i < 8; i++) {
4107 		outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
4108 		trms1040_wait_30us(io_port);
4109 		outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
4110 
4111 		/* Get data bit while falling edge */
4112 		read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
4113 		result <<= 1;
4114 		if (read_byte & NVR_BITIN)
4115 			result |= 1;
4116 
4117 		trms1040_wait_30us(io_port);
4118 	}
4119 
4120 	/* Disable chip select */
4121 	outb(0, io_port + TRM_S1040_GEN_NVRAM);
4122 	return result;
4123 }
4124 
4125 
4126 /**
4127  * trms1040_read_all - read all bytes from the eeprom
4128  *
4129  * Read the 128 bytes from the SEEPROM.
4130  *
4131  * @eeprom:	where to store the data
4132  * @io_port:	the base io port
4133  **/
4134 static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
4135 {
4136 	u8 *b_eeprom = (u8 *)eeprom;
4137 	u8 addr;
4138 
4139 	/* Enable SEEPROM */
4140 	outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
4141 	     io_port + TRM_S1040_GEN_CONTROL);
4142 
4143 	/* read details */
4144 	for (addr = 0; addr < 128; addr++, b_eeprom++)
4145 		*b_eeprom = trms1040_get_data(io_port, addr);
4146 
4147 	/* Disable SEEPROM */
4148 	outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
4149 	     io_port + TRM_S1040_GEN_CONTROL);
4150 }
4151 
4152 
4153 
4154 /**
4155  * check_eeprom - get and check contents of the eeprom
4156  *
4157  * Read seeprom 128 bytes into the memory provider in eeprom.
4158  * Checks the checksum and if it's not correct it uses a set of default
4159  * values.
4160  *
4161  * @eeprom:	caller allocated strcuture to read the eeprom data into
4162  * @io_port:	io port to read from
4163  **/
4164 static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
4165 {
4166 	u16 *w_eeprom = (u16 *)eeprom;
4167 	u16 w_addr;
4168 	u16 cksum;
4169 	u32 d_addr;
4170 	u32 *d_eeprom;
4171 
4172 	trms1040_read_all(eeprom, io_port);	/* read eeprom */
4173 
4174 	cksum = 0;
4175 	for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
4176 	     w_addr++, w_eeprom++)
4177 		cksum += *w_eeprom;
4178 	if (cksum != 0x1234) {
4179 		/*
4180 		 * Checksum is wrong.
4181 		 * Load a set of defaults into the eeprom buffer
4182 		 */
4183 		dprintkl(KERN_WARNING,
4184 			"EEProm checksum error: using default values and options.\n");
4185 		eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4186 		eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4187 		eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4188 		eeprom->sub_sys_id[1] =
4189 		    (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4190 		eeprom->sub_class = 0x00;
4191 		eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
4192 		eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
4193 		eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
4194 		eeprom->device_id[1] =
4195 		    (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
4196 		eeprom->reserved = 0x00;
4197 
4198 		for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
4199 		     d_addr < 16; d_addr++, d_eeprom++)
4200 			*d_eeprom = 0x00000077;	/* cfg3,cfg2,period,cfg0 */
4201 
4202 		*d_eeprom++ = 0x04000F07;	/* max_tag,delay_time,channel_cfg,scsi_id */
4203 		*d_eeprom++ = 0x00000015;	/* reserved1,boot_lun,boot_target,reserved0 */
4204 		for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
4205 			*d_eeprom = 0x00;
4206 
4207 		/* Now load defaults (maybe set by boot/module params) */
4208 		set_safe_settings();
4209 		fix_settings();
4210 		eeprom_override(eeprom);
4211 
4212 		eeprom->cksum = 0x00;
4213 		for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
4214 		     w_addr < 63; w_addr++, w_eeprom++)
4215 			cksum += *w_eeprom;
4216 
4217 		*w_eeprom = 0x1234 - cksum;
4218 		trms1040_write_all(eeprom, io_port);
4219 		eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
4220 	} else {
4221 		set_safe_settings();
4222 		eeprom_index_to_delay(eeprom);
4223 		eeprom_override(eeprom);
4224 	}
4225 }
4226 
4227 
4228 /**
4229  * print_eeprom_settings - output the eeprom settings
4230  * to the kernel log so people can see what they were.
4231  *
4232  * @eeprom: The eeprom data strucutre to show details for.
4233  **/
4234 static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
4235 {
4236 	dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
4237 		eeprom->scsi_id,
4238 		eeprom->target[0].period,
4239 		clock_speed[eeprom->target[0].period] / 10,
4240 		clock_speed[eeprom->target[0].period] % 10,
4241 		eeprom->target[0].cfg0);
4242 	dprintkl(KERN_INFO, "               AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
4243 		eeprom->channel_cfg, eeprom->max_tag,
4244 		1 << eeprom->max_tag, eeprom->delay_time);
4245 }
4246 
4247 
4248 /* Free SG tables */
4249 static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
4250 {
4251 	int i;
4252 	const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4253 
4254 	for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
4255 		kfree(acb->srb_array[i].segment_x);
4256 }
4257 
4258 
4259 /*
4260  * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
4261  * should never cross a page boundary */
4262 static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
4263 {
4264 	const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
4265 	                            *SEGMENTX_LEN;
4266 	int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
4267 	const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
4268 	int srb_idx = 0;
4269 	unsigned i = 0;
4270 	struct SGentry *uninitialized_var(ptr);
4271 
4272 	for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
4273 		acb->srb_array[i].segment_x = NULL;
4274 
4275 	dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
4276 	while (pages--) {
4277 		ptr = kmalloc(PAGE_SIZE, GFP_KERNEL);
4278 		if (!ptr) {
4279 			adapter_sg_tables_free(acb);
4280 			return 1;
4281 		}
4282 		dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
4283 			PAGE_SIZE, ptr, srb_idx);
4284 		i = 0;
4285 		while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
4286 			acb->srb_array[srb_idx++].segment_x =
4287 			    ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
4288 	}
4289 	if (i < srbs_per_page)
4290 		acb->srb.segment_x =
4291 		    ptr + (i * DC395x_MAX_SG_LISTENTRY);
4292 	else
4293 		dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
4294 	return 0;
4295 }
4296 
4297 
4298 
4299 /**
4300  * adapter_print_config - print adapter connection and termination
4301  * config
4302  *
4303  * The io port in the adapter needs to have been set before calling
4304  * this function.
4305  *
4306  * @acb: The adapter to print the information for.
4307  **/
4308 static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
4309 {
4310 	u8 bval;
4311 
4312 	bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
4313 	dprintkl(KERN_INFO, "%sConnectors: ",
4314 		((bval & WIDESCSI) ? "(Wide) " : ""));
4315 	if (!(bval & CON5068))
4316 		printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
4317 	if (!(bval & CON68))
4318 		printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
4319 	if (!(bval & CON50))
4320 		printk("int50 ");
4321 	if ((bval & (CON5068 | CON50 | CON68)) ==
4322 	    0 /*(CON5068 | CON50 | CON68) */ )
4323 		printk(" Oops! (All 3?) ");
4324 	bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
4325 	printk(" Termination: ");
4326 	if (bval & DIS_TERM)
4327 		printk("Disabled\n");
4328 	else {
4329 		if (bval & AUTOTERM)
4330 			printk("Auto ");
4331 		if (bval & LOW8TERM)
4332 			printk("Low ");
4333 		if (bval & UP8TERM)
4334 			printk("High ");
4335 		printk("\n");
4336 	}
4337 }
4338 
4339 
4340 /**
4341  * adapter_init_params - Initialize the various parameters in the
4342  * adapter structure. Note that the pointer to the scsi_host is set
4343  * early (when this instance is created) and the io_port and irq
4344  * values are set later after they have been reserved. This just gets
4345  * everything set to a good starting position.
4346  *
4347  * The eeprom structure in the adapter needs to have been set before
4348  * calling this function.
4349  *
4350  * @acb: The adapter to initialize.
4351  **/
4352 static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
4353 {
4354 	struct NvRamType *eeprom = &acb->eeprom;
4355 	int i;
4356 
4357 	/* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
4358 	/* NOTE: acb->io_port_base is set at port registration time */
4359 	/* NOTE: acb->io_port_len is set at port registration time */
4360 
4361 	INIT_LIST_HEAD(&acb->dcb_list);
4362 	acb->dcb_run_robin = NULL;
4363 	acb->active_dcb = NULL;
4364 
4365 	INIT_LIST_HEAD(&acb->srb_free_list);
4366 	/*  temp SRB for Q tag used or abort command used  */
4367 	acb->tmp_srb = &acb->srb;
4368 	init_timer(&acb->waiting_timer);
4369 	init_timer(&acb->selto_timer);
4370 
4371 	acb->srb_count = DC395x_MAX_SRB_CNT;
4372 
4373 	acb->sel_timeout = DC395x_SEL_TIMEOUT;	/* timeout=250ms */
4374 	/* NOTE: acb->irq_level is set at IRQ registration time */
4375 
4376 	acb->tag_max_num = 1 << eeprom->max_tag;
4377 	if (acb->tag_max_num > 30)
4378 		acb->tag_max_num = 30;
4379 
4380 	acb->acb_flag = 0;	/* RESET_DETECT, RESET_DONE, RESET_DEV */
4381 	acb->gmode2 = eeprom->channel_cfg;
4382 	acb->config = 0;	/* NOTE: actually set in adapter_init_chip */
4383 
4384 	if (eeprom->channel_cfg & NAC_SCANLUN)
4385 		acb->lun_chk = 1;
4386 	acb->scan_devices = 1;
4387 
4388 	acb->scsi_host->this_id = eeprom->scsi_id;
4389 	acb->hostid_bit = (1 << acb->scsi_host->this_id);
4390 
4391 	for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
4392 		acb->dcb_map[i] = 0;
4393 
4394 	acb->msg_len = 0;
4395 
4396 	/* link static array of srbs into the srb free list */
4397 	for (i = 0; i < acb->srb_count - 1; i++)
4398 		srb_free_insert(acb, &acb->srb_array[i]);
4399 }
4400 
4401 
4402 /**
4403  * adapter_init_host - Initialize the scsi host instance based on
4404  * values that we have already stored in the adapter instance. There's
4405  * some mention that a lot of these are deprecated, so we won't use
4406  * them (we'll use the ones in the adapter instance) but we'll fill
4407  * them in in case something else needs them.
4408  *
4409  * The eeprom structure, irq and io ports in the adapter need to have
4410  * been set before calling this function.
4411  *
4412  * @host: The scsi host instance to fill in the values for.
4413  **/
4414 static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
4415 {
4416         struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4417 	struct NvRamType *eeprom = &acb->eeprom;
4418 
4419 	host->max_cmd_len = 24;
4420 	host->can_queue = DC395x_MAX_CMD_QUEUE;
4421 	host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
4422 	host->this_id = (int)eeprom->scsi_id;
4423 	host->io_port = acb->io_port_base;
4424 	host->n_io_port = acb->io_port_len;
4425 	host->dma_channel = -1;
4426 	host->unique_id = acb->io_port_base;
4427 	host->irq = acb->irq_level;
4428 	host->last_reset = jiffies;
4429 
4430 	host->max_id = 16;
4431 	if (host->max_id - 1 == eeprom->scsi_id)
4432 		host->max_id--;
4433 
4434 #ifdef CONFIG_SCSI_MULTI_LUN
4435 	if (eeprom->channel_cfg & NAC_SCANLUN)
4436 		host->max_lun = 8;
4437 	else
4438 		host->max_lun = 1;
4439 #else
4440 	host->max_lun = 1;
4441 #endif
4442 
4443 }
4444 
4445 
4446 /**
4447  * adapter_init_chip - Get the chip into a know state and figure out
4448  * some of the settings that apply to this adapter.
4449  *
4450  * The io port in the adapter needs to have been set before calling
4451  * this function. The config will be configured correctly on return.
4452  *
4453  * @acb: The adapter which we are to init.
4454  **/
4455 static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
4456 {
4457         struct NvRamType *eeprom = &acb->eeprom;
4458 
4459         /* Mask all the interrupt */
4460 	DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
4461 	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
4462 
4463 	/* Reset SCSI module */
4464 	DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
4465 
4466 	/* Reset PCI/DMA module */
4467 	DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
4468 	udelay(20);
4469 
4470 	/* program configuration 0 */
4471 	acb->config = HCC_AUTOTERM | HCC_PARITY;
4472 	if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
4473 		acb->config |= HCC_WIDE_CARD;
4474 
4475 	if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
4476 		acb->config |= HCC_SCSI_RESET;
4477 
4478 	if (acb->config & HCC_SCSI_RESET) {
4479 		dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
4480 		DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
4481 
4482 		/*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
4483 		/*spin_unlock_irq (&io_request_lock); */
4484 		udelay(500);
4485 
4486 		acb->scsi_host->last_reset =
4487 		    jiffies + HZ / 2 +
4488 		    HZ * acb->eeprom.delay_time;
4489 
4490 		/*spin_lock_irq (&io_request_lock); */
4491 	}
4492 }
4493 
4494 
4495 /**
4496  * init_adapter - Grab the resource for the card, setup the adapter
4497  * information, set the card into a known state, create the various
4498  * tables etc etc. This basically gets all adapter information all up
4499  * to date, intialised and gets the chip in sync with it.
4500  *
4501  * @host:	This hosts adapter structure
4502  * @io_port:	The base I/O port
4503  * @irq:	IRQ
4504  *
4505  * Returns 0 if the initialization succeeds, any other value on
4506  * failure.
4507  **/
4508 static int __devinit adapter_init(struct AdapterCtlBlk *acb,
4509 	unsigned long io_port, u32 io_port_len, unsigned int irq)
4510 {
4511 	if (!request_region(io_port, io_port_len, DC395X_NAME)) {
4512 		dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
4513 		goto failed;
4514 	}
4515 	/* store port base to indicate we have registered it */
4516 	acb->io_port_base = io_port;
4517 	acb->io_port_len = io_port_len;
4518 
4519 	if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
4520 	    	/* release the region we just claimed */
4521 		dprintkl(KERN_INFO, "Failed to register IRQ\n");
4522 		goto failed;
4523 	}
4524 	/* store irq to indicate we have registered it */
4525 	acb->irq_level = irq;
4526 
4527 	/* get eeprom configuration information and command line settings etc */
4528 	check_eeprom(&acb->eeprom, io_port);
4529  	print_eeprom_settings(&acb->eeprom);
4530 
4531 	/* setup adapter control block */
4532 	adapter_init_params(acb);
4533 
4534 	/* display card connectors/termination settings */
4535  	adapter_print_config(acb);
4536 
4537 	if (adapter_sg_tables_alloc(acb)) {
4538 		dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
4539 		goto failed;
4540 	}
4541 	adapter_init_scsi_host(acb->scsi_host);
4542 	adapter_init_chip(acb);
4543 	set_basic_config(acb);
4544 
4545 	dprintkdbg(DBG_0,
4546 		"adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
4547 		"size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
4548 		acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
4549 		sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
4550 	return 0;
4551 
4552 failed:
4553 	if (acb->irq_level)
4554 		free_irq(acb->irq_level, acb);
4555 	if (acb->io_port_base)
4556 		release_region(acb->io_port_base, acb->io_port_len);
4557 	adapter_sg_tables_free(acb);
4558 
4559 	return 1;
4560 }
4561 
4562 
4563 /**
4564  * adapter_uninit_chip - cleanly shut down the scsi controller chip,
4565  * stopping all operations and disabling interrupt generation on the
4566  * card.
4567  *
4568  * @acb: The adapter which we are to shutdown.
4569  **/
4570 static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
4571 {
4572 	/* disable interrupts */
4573 	DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
4574 	DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
4575 
4576 	/* reset the scsi bus */
4577 	if (acb->config & HCC_SCSI_RESET)
4578 		reset_scsi_bus(acb);
4579 
4580 	/* clear any pending interrupt state */
4581 	DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
4582 }
4583 
4584 
4585 
4586 /**
4587  * adapter_uninit - Shut down the chip and release any resources that
4588  * we had allocated. Once this returns the adapter should not be used
4589  * anymore.
4590  *
4591  * @acb: The adapter which we are to un-initialize.
4592  **/
4593 static void adapter_uninit(struct AdapterCtlBlk *acb)
4594 {
4595 	unsigned long flags;
4596 	DC395x_LOCK_IO(acb->scsi_host, flags);
4597 
4598 	/* remove timers */
4599 	if (timer_pending(&acb->waiting_timer))
4600 		del_timer(&acb->waiting_timer);
4601 	if (timer_pending(&acb->selto_timer))
4602 		del_timer(&acb->selto_timer);
4603 
4604 	adapter_uninit_chip(acb);
4605 	adapter_remove_and_free_all_devices(acb);
4606 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
4607 
4608 	if (acb->irq_level)
4609 		free_irq(acb->irq_level, acb);
4610 	if (acb->io_port_base)
4611 		release_region(acb->io_port_base, acb->io_port_len);
4612 
4613 	adapter_sg_tables_free(acb);
4614 }
4615 
4616 
4617 #undef SPRINTF
4618 #define SPRINTF(args...) pos += sprintf(pos, args)
4619 
4620 #undef YESNO
4621 #define YESNO(YN) \
4622  if (YN) SPRINTF(" Yes ");\
4623  else SPRINTF(" No  ")
4624 
4625 static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
4626 		char **start, off_t offset, int length, int inout)
4627 {
4628 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
4629 	int spd, spd1;
4630 	char *pos = buffer;
4631 	struct DeviceCtlBlk *dcb;
4632 	unsigned long flags;
4633 	int dev;
4634 
4635 	if (inout)		/* Has data been written to the file ? */
4636 		return -EPERM;
4637 
4638 	SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
4639 	SPRINTF(" Driver Version " DC395X_VERSION "\n");
4640 
4641 	DC395x_LOCK_IO(acb->scsi_host, flags);
4642 
4643 	SPRINTF("SCSI Host Nr %i, ", host->host_no);
4644 	SPRINTF("DC395U/UW/F DC315/U %s\n",
4645 		(acb->config & HCC_WIDE_CARD) ? "Wide" : "");
4646 	SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
4647 	SPRINTF("irq_level 0x%04x, ", acb->irq_level);
4648 	SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
4649 
4650 	SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
4651 	SPRINTF("AdapterID %i\n", host->this_id);
4652 
4653 	SPRINTF("tag_max_num %i", acb->tag_max_num);
4654 	/*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
4655 	SPRINTF(", FilterCfg 0x%02x",
4656 		DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
4657 	SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
4658 	/*SPRINTF("\n"); */
4659 
4660 	SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
4661 	SPRINTF
4662 	    ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
4663 	     acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
4664 	     acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
4665 	     acb->dcb_map[6], acb->dcb_map[7]);
4666 	SPRINTF
4667 	    ("                      %02x %02x %02x %02x %02x %02x %02x %02x\n",
4668 	     acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
4669 	     acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
4670 	     acb->dcb_map[14], acb->dcb_map[15]);
4671 
4672 	SPRINTF
4673 	    ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
4674 
4675 	dev = 0;
4676 	list_for_each_entry(dcb, &acb->dcb_list, list) {
4677 		int nego_period;
4678 		SPRINTF("%02i %02i  %02i ", dev, dcb->target_id,
4679 			dcb->target_lun);
4680 		YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
4681 		YESNO(dcb->sync_offset);
4682 		YESNO(dcb->sync_period & WIDE_SYNC);
4683 		YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
4684 		YESNO(dcb->dev_mode & NTC_DO_SEND_START);
4685 		YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
4686 		nego_period = clock_period[dcb->sync_period & 0x07] << 2;
4687 		if (dcb->sync_offset)
4688 			SPRINTF("  %03i ns ", nego_period);
4689 		else
4690 			SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
4691 
4692 		if (dcb->sync_offset & 0x0f) {
4693 			spd = 1000 / (nego_period);
4694 			spd1 = 1000 % (nego_period);
4695 			spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
4696 			SPRINTF("   %2i.%1i M     %02i ", spd, spd1,
4697 				(dcb->sync_offset & 0x0f));
4698 		} else
4699 			SPRINTF("                 ");
4700 
4701 		/* Add more info ... */
4702 		SPRINTF("     %02i\n", dcb->max_command);
4703 		dev++;
4704 	}
4705 
4706 	if (timer_pending(&acb->waiting_timer))
4707 		SPRINTF("Waiting queue timer running\n");
4708 	else
4709 		SPRINTF("\n");
4710 
4711 	list_for_each_entry(dcb, &acb->dcb_list, list) {
4712 		struct ScsiReqBlk *srb;
4713 		if (!list_empty(&dcb->srb_waiting_list))
4714 			SPRINTF("DCB (%02i-%i): Waiting: %i:",
4715 				dcb->target_id, dcb->target_lun,
4716 				list_size(&dcb->srb_waiting_list));
4717                 list_for_each_entry(srb, &dcb->srb_waiting_list, list)
4718 			SPRINTF(" %li", srb->cmd->serial_number);
4719 		if (!list_empty(&dcb->srb_going_list))
4720 			SPRINTF("\nDCB (%02i-%i): Going  : %i:",
4721 				dcb->target_id, dcb->target_lun,
4722 				list_size(&dcb->srb_going_list));
4723 		list_for_each_entry(srb, &dcb->srb_going_list, list)
4724 			SPRINTF(" %li", srb->cmd->serial_number);
4725 		if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
4726 			SPRINTF("\n");
4727 	}
4728 
4729 	if (debug_enabled(DBG_1)) {
4730 		SPRINTF("DCB list for ACB %p:\n", acb);
4731 		list_for_each_entry(dcb, &acb->dcb_list, list) {
4732 			SPRINTF("%p -> ", dcb);
4733 		}
4734 		SPRINTF("END\n");
4735 	}
4736 
4737 	*start = buffer + offset;
4738 	DC395x_UNLOCK_IO(acb->scsi_host, flags);
4739 
4740 	if (pos - buffer < offset)
4741 		return 0;
4742 	else if (pos - buffer - offset < length)
4743 		return pos - buffer - offset;
4744 	else
4745 		return length;
4746 }
4747 
4748 
4749 static struct scsi_host_template dc395x_driver_template = {
4750 	.module                 = THIS_MODULE,
4751 	.proc_name              = DC395X_NAME,
4752 	.proc_info              = dc395x_proc_info,
4753 	.name                   = DC395X_BANNER " " DC395X_VERSION,
4754 	.queuecommand           = dc395x_queue_command,
4755 	.bios_param             = dc395x_bios_param,
4756 	.slave_alloc            = dc395x_slave_alloc,
4757 	.slave_destroy          = dc395x_slave_destroy,
4758 	.can_queue              = DC395x_MAX_CAN_QUEUE,
4759 	.this_id                = 7,
4760 	.sg_tablesize           = DC395x_MAX_SG_TABLESIZE,
4761 	.cmd_per_lun            = DC395x_MAX_CMD_PER_LUN,
4762 	.eh_abort_handler       = dc395x_eh_abort,
4763 	.eh_bus_reset_handler   = dc395x_eh_bus_reset,
4764 	.use_clustering         = DISABLE_CLUSTERING,
4765 };
4766 
4767 
4768 /**
4769  * banner_display - Display banner on first instance of driver
4770  * initialized.
4771  **/
4772 static void banner_display(void)
4773 {
4774 	static int banner_done = 0;
4775 	if (!banner_done)
4776 	{
4777 		dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
4778 		banner_done = 1;
4779 	}
4780 }
4781 
4782 
4783 /**
4784  * dc395x_init_one - Initialise a single instance of the adapter.
4785  *
4786  * The PCI layer will call this once for each instance of the adapter
4787  * that it finds in the system. The pci_dev strcuture indicates which
4788  * instance we are being called from.
4789  *
4790  * @dev: The PCI device to intialize.
4791  * @id: Looks like a pointer to the entry in our pci device table
4792  * that was actually matched by the PCI subsystem.
4793  *
4794  * Returns 0 on success, or an error code (-ve) on failure.
4795  **/
4796 static int __devinit dc395x_init_one(struct pci_dev *dev,
4797 		const struct pci_device_id *id)
4798 {
4799 	struct Scsi_Host *scsi_host = NULL;
4800 	struct AdapterCtlBlk *acb = NULL;
4801 	unsigned long io_port_base;
4802 	unsigned int io_port_len;
4803 	unsigned int irq;
4804 
4805 	dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
4806 	banner_display();
4807 
4808 	if (pci_enable_device(dev))
4809 	{
4810 		dprintkl(KERN_INFO, "PCI Enable device failed.\n");
4811 		return -ENODEV;
4812 	}
4813 	io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
4814 	io_port_len = pci_resource_len(dev, 0);
4815 	irq = dev->irq;
4816 	dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
4817 
4818 	/* allocate scsi host information (includes out adapter) */
4819 	scsi_host = scsi_host_alloc(&dc395x_driver_template,
4820 				    sizeof(struct AdapterCtlBlk));
4821 	if (!scsi_host) {
4822 		dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
4823 		goto fail;
4824 	}
4825  	acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
4826  	acb->scsi_host = scsi_host;
4827  	acb->dev = dev;
4828 
4829 	/* initialise the adapter and everything we need */
4830  	if (adapter_init(acb, io_port_base, io_port_len, irq)) {
4831 		dprintkl(KERN_INFO, "adapter init failed\n");
4832 		goto fail;
4833 	}
4834 
4835 	pci_set_master(dev);
4836 
4837 	/* get the scsi mid level to scan for new devices on the bus */
4838 	if (scsi_add_host(scsi_host, &dev->dev)) {
4839 		dprintkl(KERN_ERR, "scsi_add_host failed\n");
4840 		goto fail;
4841 	}
4842 	pci_set_drvdata(dev, scsi_host);
4843 	scsi_scan_host(scsi_host);
4844 
4845 	return 0;
4846 
4847 fail:
4848 	if (acb != NULL)
4849 		adapter_uninit(acb);
4850 	if (scsi_host != NULL)
4851 		scsi_host_put(scsi_host);
4852 	pci_disable_device(dev);
4853 	return -ENODEV;
4854 }
4855 
4856 
4857 /**
4858  * dc395x_remove_one - Called to remove a single instance of the
4859  * adapter.
4860  *
4861  * @dev: The PCI device to intialize.
4862  **/
4863 static void __devexit dc395x_remove_one(struct pci_dev *dev)
4864 {
4865 	struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
4866 	struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
4867 
4868 	dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
4869 
4870 	scsi_remove_host(scsi_host);
4871 	adapter_uninit(acb);
4872 	pci_disable_device(dev);
4873 	scsi_host_put(scsi_host);
4874 	pci_set_drvdata(dev, NULL);
4875 }
4876 
4877 
4878 static struct pci_device_id dc395x_pci_table[] = {
4879 	{
4880 		.vendor		= PCI_VENDOR_ID_TEKRAM,
4881 		.device		= PCI_DEVICE_ID_TEKRAM_TRMS1040,
4882 		.subvendor	= PCI_ANY_ID,
4883 		.subdevice	= PCI_ANY_ID,
4884 	 },
4885 	{}			/* Terminating entry */
4886 };
4887 MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
4888 
4889 
4890 static struct pci_driver dc395x_driver = {
4891 	.name           = DC395X_NAME,
4892 	.id_table       = dc395x_pci_table,
4893 	.probe          = dc395x_init_one,
4894 	.remove         = __devexit_p(dc395x_remove_one),
4895 };
4896 
4897 
4898 /**
4899  * dc395x_module_init - Module initialization function
4900  *
4901  * Used by both module and built-in driver to initialise this driver.
4902  **/
4903 static int __init dc395x_module_init(void)
4904 {
4905 	return pci_register_driver(&dc395x_driver);
4906 }
4907 
4908 
4909 /**
4910  * dc395x_module_exit - Module cleanup function.
4911  **/
4912 static void __exit dc395x_module_exit(void)
4913 {
4914 	pci_unregister_driver(&dc395x_driver);
4915 }
4916 
4917 
4918 module_init(dc395x_module_init);
4919 module_exit(dc395x_module_exit);
4920 
4921 MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
4922 MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
4923 MODULE_LICENSE("GPL");
4924