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[SCSI] qla2xxx: fix to honor ignored parameters in sysfs attributes
[linux-2.6-block.git] / drivers / scsi / aic7xxx / aic7xxx_osm.c
CommitLineData
1da177e4
LT		 1/*
2 * Adaptec AIC7xxx device driver for Linux.
3 *
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
5 *
6 * Copyright (c) 1994 John Aycock
7 * The University of Calgary Department of Computer Science.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, write to
21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
24 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
25 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
26 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
27 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
28 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
29 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
30 * ANSI SCSI-2 specification (draft 10c), ...
31 *
32 * --------------------------------------------------------------------------
33 *
34 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
35 *
36 * Substantially modified to include support for wide and twin bus
37 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
38 * SCB paging, and other rework of the code.
39 *
40 * --------------------------------------------------------------------------
41 * Copyright (c) 1994-2000 Justin T. Gibbs.
42 * Copyright (c) 2000-2001 Adaptec Inc.
43 * All rights reserved.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions, and the following disclaimer,
50 * without modification.
51 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
52 * substantially similar to the "NO WARRANTY" disclaimer below
53 * ("Disclaimer") and any redistribution must be conditioned upon
54 * including a substantially similar Disclaimer requirement for further
55 * binary redistribution.
56 * 3. Neither the names of the above-listed copyright holders nor the names
57 * of any contributors may be used to endorse or promote products derived
58 * from this software without specific prior written permission.
59 *
60 * Alternatively, this software may be distributed under the terms of the
61 * GNU General Public License ("GPL") version 2 as published by the Free
62 * Software Foundation.
63 *
64 * NO WARRANTY
65 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
66 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
67 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
68 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
69 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
73 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
74 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
75 * POSSIBILITY OF SUCH DAMAGES.
76 *
77 *---------------------------------------------------------------------------
78 *
79 * Thanks also go to (in alphabetical order) the following:
80 *
81 * Rory Bolt - Sequencer bug fixes
82 * Jay Estabrook - Initial DEC Alpha support
83 * Doug Ledford - Much needed abort/reset bug fixes
84 * Kai Makisara - DMAing of SCBs
85 *
86 * A Boot time option was also added for not resetting the scsi bus.
87 *
88 * Form: aic7xxx=extended
89 * aic7xxx=no_reset
90 * aic7xxx=verbose
91 *
92 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
93 *
94 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
95 */
96
97/*
98 * Further driver modifications made by Doug Ledford <dledford@redhat.com>
99 *
100 * Copyright (c) 1997-1999 Doug Ledford
101 *
102 * These changes are released under the same licensing terms as the FreeBSD
103 * driver written by Justin Gibbs. Please see his Copyright notice above
104 * for the exact terms and conditions covering my changes as well as the
105 * warranty statement.
106 *
107 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
108 * but are not limited to:
109 *
110 * 1: Import of the latest FreeBSD sequencer code for this driver
111 * 2: Modification of kernel code to accommodate different sequencer semantics
112 * 3: Extensive changes throughout kernel portion of driver to improve
113 * abort/reset processing and error hanndling
114 * 4: Other work contributed by various people on the Internet
115 * 5: Changes to printk information and verbosity selection code
116 * 6: General reliability related changes, especially in IRQ management
117 * 7: Modifications to the default probe/attach order for supported cards
118 * 8: SMP friendliness has been improved
119 *
120 */
121
122#include "aic7xxx_osm.h"
123#include "aic7xxx_inline.h"
124#include <scsi/scsicam.h>
92d161c3 125
126static struct scsi_transport_template *ahc_linux_transport_template = NULL;
1da177e4 127
1da177e4 128#include <linux/init.h> /* __setup */
1da177e4
LT		 129#include <linux/mm.h> /* For fetching system memory size */
130#include <linux/blkdev.h> /* For block_size() */
131#include <linux/delay.h> /* For ssleep/msleep */
132
1da177e4 133
1da177e4
LT		 134/*
135 * Set this to the delay in seconds after SCSI bus reset.
136 * Note, we honor this only for the initial bus reset.
137 * The scsi error recovery code performs its own bus settle
138 * delay handling for error recovery actions.
139 */
140#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
141#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
142#else
143#define AIC7XXX_RESET_DELAY 5000
144#endif
145
146/*
147 * Control collection of SCSI transfer statistics for the /proc filesystem.
148 *
149 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
150 * NOTE: This does affect performance since it has to maintain statistics.
151 */
152#ifdef CONFIG_AIC7XXX_PROC_STATS
153#define AIC7XXX_PROC_STATS
154#endif
155
156/*
157 * To change the default number of tagged transactions allowed per-device,
158 * add a line to the lilo.conf file like:
159 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
160 * which will result in the first four devices on the first two
161 * controllers being set to a tagged queue depth of 32.
162 *
163 * The tag_commands is an array of 16 to allow for wide and twin adapters.
164 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
165 * for channel 1.
166 */
167typedef struct {
168 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
169} adapter_tag_info_t;
170
171/*
172 * Modify this as you see fit for your system.
173 *
174 * 0 tagged queuing disabled
175 * 1 <= n <= 253 n == max tags ever dispatched.
176 *
177 * The driver will throttle the number of commands dispatched to a
178 * device if it returns queue full. For devices with a fixed maximum
179 * queue depth, the driver will eventually determine this depth and
180 * lock it in (a console message is printed to indicate that a lock
181 * has occurred). On some devices, queue full is returned for a temporary
182 * resource shortage. These devices will return queue full at varying
183 * depths. The driver will throttle back when the queue fulls occur and
184 * attempt to slowly increase the depth over time as the device recovers
185 * from the resource shortage.
186 *
187 * In this example, the first line will disable tagged queueing for all
188 * the devices on the first probed aic7xxx adapter.
189 *
190 * The second line enables tagged queueing with 4 commands/LUN for IDs
191 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
192 * driver to attempt to use up to 64 tags for ID 1.
193 *
194 * The third line is the same as the first line.
195 *
196 * The fourth line disables tagged queueing for devices 0 and 3. It
197 * enables tagged queueing for the other IDs, with 16 commands/LUN
198 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
199 * IDs 2, 5-7, and 9-15.
200 */
201
202/*
203 * NOTE: The below structure is for reference only, the actual structure
204 * to modify in order to change things is just below this comment block.
205adapter_tag_info_t aic7xxx_tag_info[] =
206{
207 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
208 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
209 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
210 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
211};
212*/
213
214#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
215#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
216#else
217#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
218#endif
219
220#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
221 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
222 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
223 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
224 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
225 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
226 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
227 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
228 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
229}
230
231/*
232 * By default, use the number of commands specified by
233 * the users kernel configuration.
234 */
235static adapter_tag_info_t aic7xxx_tag_info[] =
236{
237 {AIC7XXX_CONFIGED_TAG_COMMANDS},
238 {AIC7XXX_CONFIGED_TAG_COMMANDS},
239 {AIC7XXX_CONFIGED_TAG_COMMANDS},
240 {AIC7XXX_CONFIGED_TAG_COMMANDS},
241 {AIC7XXX_CONFIGED_TAG_COMMANDS},
242 {AIC7XXX_CONFIGED_TAG_COMMANDS},
243 {AIC7XXX_CONFIGED_TAG_COMMANDS},
244 {AIC7XXX_CONFIGED_TAG_COMMANDS},
245 {AIC7XXX_CONFIGED_TAG_COMMANDS},
246 {AIC7XXX_CONFIGED_TAG_COMMANDS},
247 {AIC7XXX_CONFIGED_TAG_COMMANDS},
248 {AIC7XXX_CONFIGED_TAG_COMMANDS},
249 {AIC7XXX_CONFIGED_TAG_COMMANDS},
250 {AIC7XXX_CONFIGED_TAG_COMMANDS},
251 {AIC7XXX_CONFIGED_TAG_COMMANDS},
252 {AIC7XXX_CONFIGED_TAG_COMMANDS}
253};
254
1da177e4
LT		 255/*
256 * There should be a specific return value for this in scsi.h, but
257 * it seems that most drivers ignore it.
258 */
259#define DID_UNDERFLOW DID_ERROR
260
261void
262ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
263{
264 printk("(scsi%d:%c:%d:%d): ",
265 ahc->platform_data->host->host_no,
266 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
267 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
268 scb != NULL ? SCB_GET_LUN(scb) : -1);
269}
270
271/*
272 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
273 * cards in the system. This should be fixed. Exceptions to this
274 * rule are noted in the comments.
275 */
276
277/*
278 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
279 * has no effect on any later resets that might occur due to things like
280 * SCSI bus timeouts.
281 */
282static uint32_t aic7xxx_no_reset;
283
1da177e4
LT		 284/*
285 * Should we force EXTENDED translation on a controller.
286 * 0 == Use whatever is in the SEEPROM or default to off
287 * 1 == Use whatever is in the SEEPROM or default to on
288 */
289static uint32_t aic7xxx_extended;
290
291/*
292 * PCI bus parity checking of the Adaptec controllers. This is somewhat
293 * dubious at best. To my knowledge, this option has never actually
294 * solved a PCI parity problem, but on certain machines with broken PCI
295 * chipset configurations where stray PCI transactions with bad parity are
296 * the norm rather than the exception, the error messages can be overwelming.
297 * It's included in the driver for completeness.
298 * 0 = Shut off PCI parity check
299 * non-0 = reverse polarity pci parity checking
300 */
301static uint32_t aic7xxx_pci_parity = ~0;
302
1da177e4
LT		 303/*
304 * There are lots of broken chipsets in the world. Some of them will
305 * violate the PCI spec when we issue byte sized memory writes to our
306 * controller. I/O mapped register access, if allowed by the given
307 * platform, will work in almost all cases.
308 */
309uint32_t aic7xxx_allow_memio = ~0;
310
1da177e4
LT		 311/*
312 * So that we can set how long each device is given as a selection timeout.
313 * The table of values goes like this:
314 * 0 - 256ms
315 * 1 - 128ms
316 * 2 - 64ms
317 * 3 - 32ms
318 * We default to 256ms because some older devices need a longer time
319 * to respond to initial selection.
320 */
321static uint32_t aic7xxx_seltime;
322
323/*
324 * Certain devices do not perform any aging on commands. Should the
325 * device be saturated by commands in one portion of the disk, it is
326 * possible for transactions on far away sectors to never be serviced.
327 * To handle these devices, we can periodically send an ordered tag to
328 * force all outstanding transactions to be serviced prior to a new
329 * transaction.
330 */
289fe5b1 331static uint32_t aic7xxx_periodic_otag;
1da177e4
LT		 332
333/*
334 * Module information and settable options.
335 */
336static char *aic7xxx = NULL;
337
338MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
339MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
340MODULE_LICENSE("Dual BSD/GPL");
341MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
342module_param(aic7xxx, charp, 0444);
343MODULE_PARM_DESC(aic7xxx,
2b6ee9b5 344"period-delimited options string:\n"
1da177e4
LT		 345" verbose Enable verbose/diagnostic logging\n"
346" allow_memio Allow device registers to be memory mapped\n"
347" debug Bitmask of debug values to enable\n"
348" no_probe Toggle EISA/VLB controller probing\n"
349" probe_eisa_vl Toggle EISA/VLB controller probing\n"
350" no_reset Supress initial bus resets\n"
351" extended Enable extended geometry on all controllers\n"
352" periodic_otag Send an ordered tagged transaction\n"
353" periodically to prevent tag starvation.\n"
354" This may be required by some older disk\n"
355" drives or RAID arrays.\n"
1da177e4
LT		 356" tag_info:<tag_str> Set per-target tag depth\n"
357" global_tag_depth:<int> Global tag depth for every target\n"
358" on every bus\n"
1da177e4
LT		 359" seltime:<int> Selection Timeout\n"
360" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
361"\n"
362" Sample /etc/modprobe.conf line:\n"
363" Toggle EISA/VLB probing\n"
364" Set tag depth on Controller 1/Target 1 to 10 tags\n"
365" Shorten the selection timeout to 128ms\n"
366"\n"
367" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
368);
369
370static void ahc_linux_handle_scsi_status(struct ahc_softc *,
b1abb4d6 371 struct scsi_device *,
1da177e4
LT		 372 struct scb *);
373static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
013791ee 374 struct scsi_cmnd *cmd);
1da177e4 375static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
dacee84b 376static void ahc_linux_release_simq(struct ahc_softc *ahc);
013791ee 377static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
1da177e4 378static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
1da177e4
LT		 379static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
380 struct ahc_devinfo *devinfo);
b1abb4d6 381static void ahc_linux_device_queue_depth(struct scsi_device *);
e4e360c3
JB		 382static int ahc_linux_run_command(struct ahc_softc*,
383 struct ahc_linux_device *,
384 struct scsi_cmnd *);
1da177e4 385static void ahc_linux_setup_tag_info_global(char *p);
1da177e4 386static int aic7xxx_setup(char *s);
2a40342e
CH		 387
388static int ahc_linux_unit;
389
1da177e4
LT		 390
391/********************************* Inlines ************************************/
1da177e4
LT		 392static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
393
394static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
395 struct ahc_dma_seg *sg,
396 dma_addr_t addr, bus_size_t len);
397
1da177e4
LT		 398static __inline void
399ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
400{
013791ee 401 struct scsi_cmnd *cmd;
1da177e4
LT		 402
403 cmd = scb->io_ctx;
404 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
3a57c4a5
FT		 405
406 scsi_dma_unmap(cmd);
1da177e4
LT		 407}
408
409static __inline int
410ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
411 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
412{
413 int consumed;
414
415 if ((scb->sg_count + 1) > AHC_NSEG)
416 panic("Too few segs for dma mapping. "
417 "Increase AHC_NSEG\n");
418
419 consumed = 1;
420 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
421 scb->platform_data->xfer_len += len;
422
423 if (sizeof(dma_addr_t) > 4
424 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
425 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
426
427 sg->len = ahc_htole32(len);
428 return (consumed);
429}
430
1da177e4
LT		 431/*
432 * Return a string describing the driver.
433 */
434static const char *
435ahc_linux_info(struct Scsi_Host *host)
436{
437 static char buffer[512];
438 char ahc_info[256];
439 char *bp;
440 struct ahc_softc *ahc;
441
442 bp = &buffer[0];
443 ahc = *(struct ahc_softc **)host->hostdata;
444 memset(bp, 0, sizeof(buffer));
445 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
446 strcat(bp, AIC7XXX_DRIVER_VERSION);
447 strcat(bp, "\n");
448 strcat(bp, " <");
449 strcat(bp, ahc->description);
450 strcat(bp, ">\n");
451 strcat(bp, " ");
452 ahc_controller_info(ahc, ahc_info);
453 strcat(bp, ahc_info);
454 strcat(bp, "\n");
455
456 return (bp);
457}
458
459/*
460 * Queue an SCB to the controller.
461 */
462static int
013791ee 463ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
1da177e4
LT		 464{
465 struct ahc_softc *ahc;
b1abb4d6 466 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
6d5e9fd1
CH		 467 int rtn = SCSI_MLQUEUE_HOST_BUSY;
468 unsigned long flags;
1da177e4
LT		 469
470 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
471
6d5e9fd1
CH		 472 ahc_lock(ahc, &flags);
473 if (ahc->platform_data->qfrozen == 0) {
474 cmd->scsi_done = scsi_done;
475 cmd->result = CAM_REQ_INPROG << 16;
476 rtn = ahc_linux_run_command(ahc, dev, cmd);
477 }
478 ahc_unlock(ahc, &flags);
e4e360c3 479
6d5e9fd1 480 return rtn;
1da177e4
LT		 481}
482
b1abb4d6
JB		 483static inline struct scsi_target **
484ahc_linux_target_in_softc(struct scsi_target *starget)
1da177e4 485{
b1abb4d6
JB		 486 struct ahc_softc *ahc =
487 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
fb3089df 488 unsigned int target_offset;
b1abb4d6
JB		 489
490 target_offset = starget->id;
491 if (starget->channel != 0)
492 target_offset += 8;
493
494 return &ahc->platform_data->starget[target_offset];
495}
496
497static int
498ahc_linux_target_alloc(struct scsi_target *starget)
499{
500 struct ahc_softc *ahc =
501 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
502 struct seeprom_config *sc = ahc->seep_config;
fb3089df 503 unsigned long flags;
b1abb4d6 504 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
b1abb4d6
JB		 505 unsigned short scsirate;
506 struct ahc_devinfo devinfo;
507 struct ahc_initiator_tinfo *tinfo;
508 struct ahc_tmode_tstate *tstate;
509 char channel = starget->channel + 'A';
510 unsigned int our_id = ahc->our_id;
511 unsigned int target_offset;
c7525233
JB		 512
513 target_offset = starget->id;
514 if (starget->channel != 0)
515 target_offset += 8;
b1abb4d6
JB		 516
517 if (starget->channel)
518 our_id = ahc->our_id_b;
1da177e4 519
fb3089df 520 ahc_lock(ahc, &flags);
fb3089df 521
b1abb4d6 522 BUG_ON(*ahc_targp != NULL);
c7525233 523
b1abb4d6 524 *ahc_targp = starget;
c7525233 525
b1abb4d6 526 if (sc) {
12021fff
JB		 527 int maxsync = AHC_SYNCRATE_DT;
528 int ultra = 0;
529 int flags = sc->device_flags[target_offset];
530
531 if (ahc->flags & AHC_NEWEEPROM_FMT) {
532 if (flags & CFSYNCHISULTRA)
533 ultra = 1;
534 } else if (flags & CFULTRAEN)
535 ultra = 1;
536 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
537 * change it to ultra=0, CFXFER = 0 */
538 if(ultra && (flags & CFXFER) == 0x04) {
539 ultra = 0;
540 flags &= ~CFXFER;
541 }
542
b1abb4d6 543 if ((ahc->features & AHC_ULTRA2) != 0) {
12021fff 544 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
b1abb4d6 545 } else {
12021fff
JB		 546 scsirate = (flags & CFXFER) << 4;
547 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
548 AHC_SYNCRATE_FAST;
c7525233 549 }
12021fff
JB		 550 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
551 if (!(flags & CFSYNCH))
552 spi_max_offset(starget) = 0;
b1abb4d6 553 spi_min_period(starget) =
12021fff
JB		 554 ahc_find_period(ahc, scsirate, maxsync);
555
b1abb4d6
JB		 556 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
557 starget->id, &tstate);
c7525233 558 }
b1abb4d6
JB		 559 ahc_compile_devinfo(&devinfo, our_id, starget->id,
560 CAM_LUN_WILDCARD, channel,
561 ROLE_INITIATOR);
562 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
563 AHC_TRANS_GOAL, /*paused*/FALSE);
564 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
565 AHC_TRANS_GOAL, /*paused*/FALSE);
fb3089df 566 ahc_unlock(ahc, &flags);
b1abb4d6
JB		 567
568 return 0;
569}
570
571static void
572ahc_linux_target_destroy(struct scsi_target *starget)
573{
574 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
575
576 *ahc_targp = NULL;
577}
578
579static int
580ahc_linux_slave_alloc(struct scsi_device *sdev)
581{
582 struct ahc_softc *ahc =
583 *((struct ahc_softc **)sdev->host->hostdata);
584 struct scsi_target *starget = sdev->sdev_target;
b1abb4d6
JB		 585 struct ahc_linux_device *dev;
586
587 if (bootverbose)
588 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
589
b1abb4d6
JB		 590 dev = scsi_transport_device_data(sdev);
591 memset(dev, 0, sizeof(*dev));
592
593 /*
594 * We start out life using untagged
595 * transactions of which we allow one.
596 */
597 dev->openings = 1;
598
599 /*
600 * Set maxtags to 0. This will be changed if we
601 * later determine that we are dealing with
602 * a tagged queuing capable device.
603 */
604 dev->maxtags = 0;
605
79778a27
JB		 606 spi_period(starget) = 0;
607
b1abb4d6 608 return 0;
1da177e4
LT		 609}
610
611static int
b1abb4d6 612ahc_linux_slave_configure(struct scsi_device *sdev)
1da177e4
LT		 613{
614 struct ahc_softc *ahc;
1da177e4 615
b1abb4d6 616 ahc = *((struct ahc_softc **)sdev->host->hostdata);
c7525233 617
1da177e4 618 if (bootverbose)
017560fc 619 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
c7525233 620
b1abb4d6 621 ahc_linux_device_queue_depth(sdev);
cb624029 622
623 /* Initial Domain Validation */
b1abb4d6
JB		 624 if (!spi_initial_dv(sdev->sdev_target))
625 spi_dv_device(sdev);
cb624029 626
c7525233 627 return 0;
1da177e4
LT		 628}
629
1da177e4
LT		 630#if defined(__i386__)
631/*
632 * Return the disk geometry for the given SCSI device.
633 */
634static int
1da177e4
LT		 635ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
636 sector_t capacity, int geom[])
637{
638 uint8_t *bh;
1da177e4
LT		 639 int heads;
640 int sectors;
641 int cylinders;
642 int ret;
643 int extended;
644 struct ahc_softc *ahc;
645 u_int channel;
646
647 ahc = *((struct ahc_softc **)sdev->host->hostdata);
422c0d61 648 channel = sdev_channel(sdev);
1da177e4 649
1da177e4 650 bh = scsi_bios_ptable(bdev);
1da177e4
LT		 651 if (bh) {
652 ret = scsi_partsize(bh, capacity,
653 &geom[2], &geom[0], &geom[1]);
1da177e4 654 kfree(bh);
1da177e4
LT		 655 if (ret != -1)
656 return (ret);
657 }
658 heads = 64;
659 sectors = 32;
660 cylinders = aic_sector_div(capacity, heads, sectors);
661
662 if (aic7xxx_extended != 0)
663 extended = 1;
664 else if (channel == 0)
665 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
666 else
667 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
668 if (extended && cylinders >= 1024) {
669 heads = 255;
670 sectors = 63;
671 cylinders = aic_sector_div(capacity, heads, sectors);
672 }
673 geom[0] = heads;
674 geom[1] = sectors;
675 geom[2] = cylinders;
676 return (0);
677}
678#endif
679
680/*
681 * Abort the current SCSI command(s).
682 */
683static int
013791ee 684ahc_linux_abort(struct scsi_cmnd *cmd)
1da177e4
LT		 685{
686 int error;
687
688 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
689 if (error != 0)
690 printf("aic7xxx_abort returns 0x%x\n", error);
691 return (error);
692}
693
694/*
695 * Attempt to send a target reset message to the device that timed out.
696 */
697static int
013791ee 698ahc_linux_dev_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 699{
700 int error;
701
702 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
703 if (error != 0)
704 printf("aic7xxx_dev_reset returns 0x%x\n", error);
705 return (error);
706}
707
708/*
709 * Reset the SCSI bus.
710 */
711static int
013791ee 712ahc_linux_bus_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 713{
714 struct ahc_softc *ahc;
1da177e4 715 int found;
68b3aa7c 716 unsigned long flags;
1da177e4
LT		 717
718 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
68b3aa7c
JG		 719
720 ahc_lock(ahc, &flags);
422c0d61 721 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
1da177e4 722 /*initiate reset*/TRUE);
68b3aa7c 723 ahc_unlock(ahc, &flags);
1da177e4
LT		 724
725 if (bootverbose)
726 printf("%s: SCSI bus reset delivered. "
727 "%d SCBs aborted.\n", ahc_name(ahc), found);
728
729 return SUCCESS;
730}
731
013791ee 732struct scsi_host_template aic7xxx_driver_template = {
1da177e4
LT		 733 .module = THIS_MODULE,
734 .name = "aic7xxx",
dfd287f6 735 .proc_name = "aic7xxx",
1da177e4
LT		 736 .proc_info = ahc_linux_proc_info,
737 .info = ahc_linux_info,
738 .queuecommand = ahc_linux_queue,
739 .eh_abort_handler = ahc_linux_abort,
740 .eh_device_reset_handler = ahc_linux_dev_reset,
741 .eh_bus_reset_handler = ahc_linux_bus_reset,
742#if defined(__i386__)
743 .bios_param = ahc_linux_biosparam,
744#endif
745 .can_queue = AHC_MAX_QUEUE,
746 .this_id = -1,
80f1443c 747 .max_sectors = 8192,
1da177e4
LT		 748 .cmd_per_lun = 2,
749 .use_clustering = ENABLE_CLUSTERING,
750 .slave_alloc = ahc_linux_slave_alloc,
751 .slave_configure = ahc_linux_slave_configure,
b1abb4d6
JB		 752 .target_alloc = ahc_linux_target_alloc,
753 .target_destroy = ahc_linux_target_destroy,
1da177e4
LT		 754};
755
756/**************************** Tasklet Handler *********************************/
757
1da177e4
LT		 758/******************************** Macros **************************************/
759#define BUILD_SCSIID(ahc, cmd) \
760 ((((cmd)->device->id << TID_SHIFT) & TID) \
761 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
762 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
763
764/******************************** Bus DMA *************************************/
765int
766ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
767 bus_size_t alignment, bus_size_t boundary,
768 dma_addr_t lowaddr, dma_addr_t highaddr,
769 bus_dma_filter_t *filter, void *filterarg,
770 bus_size_t maxsize, int nsegments,
771 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
772{
773 bus_dma_tag_t dmat;
774
775 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
776 if (dmat == NULL)
777 return (ENOMEM);
778
779 /*
780 * Linux is very simplistic about DMA memory. For now don't
781 * maintain all specification information. Once Linux supplies
782 * better facilities for doing these operations, or the
783 * needs of this particular driver change, we might need to do
784 * more here.
785 */
786 dmat->alignment = alignment;
787 dmat->boundary = boundary;
788 dmat->maxsize = maxsize;
789 *ret_tag = dmat;
790 return (0);
791}
792
793void
794ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
795{
796 free(dmat, M_DEVBUF);
797}
798
799int
800ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
801 int flags, bus_dmamap_t *mapp)
802{
1da177e4 803 *vaddr = pci_alloc_consistent(ahc->dev_softc,
7dfa0f26 804 dmat->maxsize, mapp);
1da177e4 805 if (*vaddr == NULL)
7dfa0f26
CH		 806 return ENOMEM;
807 return 0;
1da177e4
LT		 808}
809
810void
811ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
812 void* vaddr, bus_dmamap_t map)
813{
814 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
7dfa0f26 815 vaddr, map);
1da177e4
LT		 816}
817
818int
819ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
820 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
821 void *cb_arg, int flags)
822{
823 /*
824 * Assume for now that this will only be used during
825 * initialization and not for per-transaction buffer mapping.
826 */
827 bus_dma_segment_t stack_sg;
828
7dfa0f26 829 stack_sg.ds_addr = map;
1da177e4
LT		 830 stack_sg.ds_len = dmat->maxsize;
831 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
832 return (0);
833}
834
835void
836ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
837{
1da177e4
LT		 838}
839
840int
841ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
842{
843 /* Nothing to do */
844 return (0);
845}
846
1da177e4
LT		 847static void
848ahc_linux_setup_tag_info_global(char *p)
849{
850 int tags, i, j;
851
852 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
853 printf("Setting Global Tags= %d\n", tags);
854
6391a113 855 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
1da177e4
LT		 856 for (j = 0; j < AHC_NUM_TARGETS; j++) {
857 aic7xxx_tag_info[i].tag_commands[j] = tags;
858 }
859 }
860}
861
862static void
863ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
864{
865
866 if ((instance >= 0) && (targ >= 0)
6391a113 867 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
1da177e4
LT		 868 && (targ < AHC_NUM_TARGETS)) {
869 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
870 if (bootverbose)
871 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
872 }
873}
874
1ff92730
CH		 875static char *
876ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
877 void (*callback)(u_long, int, int, int32_t),
878 u_long callback_arg)
879{
880 char *tok_end;
881 char *tok_end2;
882 int i;
883 int instance;
884 int targ;
885 int done;
886 char tok_list[] = {'.', ',', '{', '}', '\0'};
887
888 /* All options use a ':' name/arg separator */
889 if (*opt_arg != ':')
890 return (opt_arg);
891 opt_arg++;
892 instance = -1;
893 targ = -1;
894 done = FALSE;
895 /*
896 * Restore separator that may be in
897 * the middle of our option argument.
898 */
899 tok_end = strchr(opt_arg, '\0');
900 if (tok_end < end)
901 *tok_end = ',';
902 while (!done) {
903 switch (*opt_arg) {
904 case '{':
905 if (instance == -1) {
906 instance = 0;
907 } else {
908 if (depth > 1) {
909 if (targ == -1)
910 targ = 0;
911 } else {
912 printf("Malformed Option %s\n",
913 opt_name);
914 done = TRUE;
915 }
916 }
917 opt_arg++;
918 break;
919 case '}':
920 if (targ != -1)
921 targ = -1;
922 else if (instance != -1)
923 instance = -1;
924 opt_arg++;
925 break;
926 case ',':
927 case '.':
928 if (instance == -1)
929 done = TRUE;
930 else if (targ >= 0)
931 targ++;
932 else if (instance >= 0)
933 instance++;
934 opt_arg++;
935 break;
936 case '\0':
937 done = TRUE;
938 break;
939 default:
940 tok_end = end;
941 for (i = 0; tok_list[i]; i++) {
942 tok_end2 = strchr(opt_arg, tok_list[i]);
943 if ((tok_end2) && (tok_end2 < tok_end))
944 tok_end = tok_end2;
945 }
946 callback(callback_arg, instance, targ,
947 simple_strtol(opt_arg, NULL, 0));
948 opt_arg = tok_end;
949 break;
950 }
951 }
952 return (opt_arg);
953}
954
1da177e4
LT		 955/*
956 * Handle Linux boot parameters. This routine allows for assigning a value
957 * to a parameter with a ':' between the parameter and the value.
958 * ie. aic7xxx=stpwlev:1,extended
959 */
960static int
961aic7xxx_setup(char *s)
962{
963 int i, n;
964 char *p;
965 char *end;
966
967 static struct {
968 const char *name;
969 uint32_t *flag;
970 } options[] = {
971 { "extended", &aic7xxx_extended },
972 { "no_reset", &aic7xxx_no_reset },
973 { "verbose", &aic7xxx_verbose },
974 { "allow_memio", &aic7xxx_allow_memio},
975#ifdef AHC_DEBUG
976 { "debug", &ahc_debug },
977#endif
1da177e4
LT		 978 { "periodic_otag", &aic7xxx_periodic_otag },
979 { "pci_parity", &aic7xxx_pci_parity },
980 { "seltime", &aic7xxx_seltime },
981 { "tag_info", NULL },
982 { "global_tag_depth", NULL },
983 { "dv", NULL }
984 };
985
986 end = strchr(s, '\0');
987
988 /*
6391a113 989 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1da177e4
LT		 990 * will never be 0 in this case.
991 */
992 n = 0;
993
994 while ((p = strsep(&s, ",.")) != NULL) {
995 if (*p == '\0')
996 continue;
6391a113 997 for (i = 0; i < ARRAY_SIZE(options); i++) {
1da177e4
LT		 998
999 n = strlen(options[i].name);
1000 if (strncmp(options[i].name, p, n) == 0)
1001 break;
1002 }
6391a113 1003 if (i == ARRAY_SIZE(options))
1da177e4
LT		 1004 continue;
1005
1006 if (strncmp(p, "global_tag_depth", n) == 0) {
1007 ahc_linux_setup_tag_info_global(p + n);
1008 } else if (strncmp(p, "tag_info", n) == 0) {
1ff92730 1009 s = ahc_parse_brace_option("tag_info", p + n, end,
1da177e4 1010 2, ahc_linux_setup_tag_info, 0);
1da177e4
LT		 1011 } else if (p[n] == ':') {
1012 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1013 } else if (strncmp(p, "verbose", n) == 0) {
1014 *(options[i].flag) = 1;
1015 } else {
1016 *(options[i].flag) ^= 0xFFFFFFFF;
1017 }
1018 }
1019 return 1;
1020}
1021
1022__setup("aic7xxx=", aic7xxx_setup);
1023
1024uint32_t aic7xxx_verbose;
1025
1026int
013791ee 1027ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1da177e4 1028{
9e1fe931
JJ		 1029 char buf[80];
1030 struct Scsi_Host *host;
1da177e4 1031 char *new_name;
9e1fe931
JJ		 1032 u_long s;
1033 int retval;
1da177e4
LT		 1034
1035 template->name = ahc->description;
1036 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1037 if (host == NULL)
1038 return (ENOMEM);
1039
1040 *((struct ahc_softc **)host->hostdata) = ahc;
1da177e4
LT		 1041 ahc->platform_data->host = host;
1042 host->can_queue = AHC_MAX_QUEUE;
1043 host->cmd_per_lun = 2;
1044 /* XXX No way to communicate the ID for multiple channels */
1045 host->this_id = ahc->our_id;
1046 host->irq = ahc->platform_data->irq;
1047 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1048 host->max_lun = AHC_NUM_LUNS;
1049 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1050 host->sg_tablesize = AHC_NSEG;
dacee84b 1051 ahc_lock(ahc, &s);
2a40342e 1052 ahc_set_unit(ahc, ahc_linux_unit++);
dacee84b 1053 ahc_unlock(ahc, &s);
1da177e4
LT		 1054 sprintf(buf, "scsi%d", host->host_no);
1055 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1056 if (new_name != NULL) {
1057 strcpy(new_name, buf);
1058 ahc_set_name(ahc, new_name);
1059 }
1060 host->unique_id = ahc->unit;
1da177e4 1061 ahc_linux_initialize_scsi_bus(ahc);
1da177e4 1062 ahc_intr_enable(ahc, TRUE);
1da177e4 1063
92d161c3 1064 host->transportt = ahc_linux_transport_template;
1065
9e1fe931
JJ		 1066 retval = scsi_add_host(host,
1067 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
1068 if (retval) {
1069 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1070 scsi_host_put(host);
1071 return retval;
1072 }
1073
1da177e4 1074 scsi_scan_host(host);
9e1fe931 1075 return 0;
1da177e4
LT		 1076}
1077
1da177e4
LT		 1078/*
1079 * Place the SCSI bus into a known state by either resetting it,
1080 * or forcing transfer negotiations on the next command to any
1081 * target.
1082 */
1083void
1084ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1085{
1086 int i;
1087 int numtarg;
dacee84b 1088 unsigned long s;
1da177e4
LT		 1089
1090 i = 0;
1091 numtarg = 0;
1092
dacee84b
JB		 1093 ahc_lock(ahc, &s);
1094
1da177e4
LT		 1095 if (aic7xxx_no_reset != 0)
1096 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1097
1098 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1099 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1100 else
1101 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1102
1103 if ((ahc->features & AHC_TWIN) != 0) {
1104
1105 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1106 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1107 } else {
1108 if (numtarg == 0)
1109 i = 8;
1110 numtarg += 8;
1111 }
1112 }
1113
1114 /*
1115 * Force negotiation to async for all targets that
1116 * will not see an initial bus reset.
1117 */
1118 for (; i < numtarg; i++) {
1119 struct ahc_devinfo devinfo;
1120 struct ahc_initiator_tinfo *tinfo;
1121 struct ahc_tmode_tstate *tstate;
1122 u_int our_id;
1123 u_int target_id;
1124 char channel;
1125
1126 channel = 'A';
1127 our_id = ahc->our_id;
1128 target_id = i;
1129 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1130 channel = 'B';
1131 our_id = ahc->our_id_b;
1132 target_id = i % 8;
1133 }
1134 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1135 target_id, &tstate);
1136 ahc_compile_devinfo(&devinfo, our_id, target_id,
1137 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1138 ahc_update_neg_request(ahc, &devinfo, tstate,
1139 tinfo, AHC_NEG_ALWAYS);
1140 }
dacee84b 1141 ahc_unlock(ahc, &s);
1da177e4
LT		 1142 /* Give the bus some time to recover */
1143 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1144 ahc_linux_freeze_simq(ahc);
dacee84b
JB		 1145 msleep(AIC7XXX_RESET_DELAY);
1146 ahc_linux_release_simq(ahc);
1da177e4
LT		 1147 }
1148}
1149
1150int
1151ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1152{
1153
1154 ahc->platform_data =
1155 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1156 if (ahc->platform_data == NULL)
1157 return (ENOMEM);
1158 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1da177e4 1159 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1da177e4 1160 ahc_lockinit(ahc);
1da177e4
LT		 1161 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1162 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1163 if (aic7xxx_pci_parity == 0)
1164 ahc->flags |= AHC_DISABLE_PCI_PERR;
1165
1166 return (0);
1167}
1168
1169void
1170ahc_platform_free(struct ahc_softc *ahc)
1171{
b1abb4d6 1172 struct scsi_target *starget;
9080063f 1173 int i;
1da177e4
LT		 1174
1175 if (ahc->platform_data != NULL) {
1da177e4
LT		 1176 /* destroy all of the device and target objects */
1177 for (i = 0; i < AHC_NUM_TARGETS; i++) {
b1abb4d6
JB		 1178 starget = ahc->platform_data->starget[i];
1179 if (starget != NULL) {
b1abb4d6 1180 ahc->platform_data->starget[i] = NULL;
1da177e4
LT		 1181 }
1182 }
1183
1184 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1185 free_irq(ahc->platform_data->irq, ahc);
1186 if (ahc->tag == BUS_SPACE_PIO
1187 && ahc->bsh.ioport != 0)
1188 release_region(ahc->bsh.ioport, 256);
1189 if (ahc->tag == BUS_SPACE_MEMIO
1190 && ahc->bsh.maddr != NULL) {
1191 iounmap(ahc->bsh.maddr);
1192 release_mem_region(ahc->platform_data->mem_busaddr,
1193 0x1000);
1194 }
dedd8310 1195
97af50f6
JB		 1196 if (ahc->platform_data->host)
1197 scsi_host_put(ahc->platform_data->host);
1198
1da177e4
LT		 1199 free(ahc->platform_data, M_DEVBUF);
1200 }
1201}
1202
1203void
1204ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1205{
1206 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1207 SCB_GET_CHANNEL(ahc, scb),
1208 SCB_GET_LUN(scb), SCB_LIST_NULL,
1209 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1210}
1211
1212void
9080063f
HR		 1213ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1214 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1da177e4
LT		 1215{
1216 struct ahc_linux_device *dev;
1217 int was_queuing;
1218 int now_queuing;
1219
b1abb4d6 1220 if (sdev == NULL)
1da177e4 1221 return;
b1abb4d6
JB		 1222 dev = scsi_transport_device_data(sdev);
1223
1da177e4
LT		 1224 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1225 switch (alg) {
1226 default:
1227 case AHC_QUEUE_NONE:
1228 now_queuing = 0;
1229 break;
1230 case AHC_QUEUE_BASIC:
1231 now_queuing = AHC_DEV_Q_BASIC;
1232 break;
1233 case AHC_QUEUE_TAGGED:
1234 now_queuing = AHC_DEV_Q_TAGGED;
1235 break;
1236 }
1237 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1238 && (was_queuing != now_queuing)
1239 && (dev->active != 0)) {
1240 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1241 dev->qfrozen++;
1242 }
1243
1244 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1245 if (now_queuing) {
1246 u_int usertags;
1247
1248 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1249 if (!was_queuing) {
1250 /*
1251 * Start out agressively and allow our
1252 * dynamic queue depth algorithm to take
1253 * care of the rest.
1254 */
1255 dev->maxtags = usertags;
1256 dev->openings = dev->maxtags - dev->active;
1257 }
1258 if (dev->maxtags == 0) {
1259 /*
1260 * Queueing is disabled by the user.
1261 */
1262 dev->openings = 1;
1263 } else if (alg == AHC_QUEUE_TAGGED) {
1264 dev->flags |= AHC_DEV_Q_TAGGED;
1265 if (aic7xxx_periodic_otag != 0)
1266 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1267 } else
1268 dev->flags |= AHC_DEV_Q_BASIC;
1269 } else {
1270 /* We can only have one opening. */
1271 dev->maxtags = 0;
1272 dev->openings = 1 - dev->active;
1273 }
b1abb4d6
JB		 1274 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1275 case AHC_DEV_Q_BASIC:
fdd0edf2
JB		 1276 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
1277 scsi_activate_tcq(sdev, dev->openings + dev->active);
b1abb4d6
JB		 1278 break;
1279 case AHC_DEV_Q_TAGGED:
fdd0edf2
JB		 1280 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
1281 scsi_activate_tcq(sdev, dev->openings + dev->active);
b1abb4d6
JB		 1282 break;
1283 default:
1284 /*
1285 * We allow the OS to queue 2 untagged transactions to
1286 * us at any time even though we can only execute them
1287 * serially on the controller/device. This should
1288 * remove some latency.
1289 */
fdd0edf2 1290 scsi_deactivate_tcq(sdev, 2);
b1abb4d6 1291 break;
1da177e4 1292 }
1da177e4
LT		 1293}
1294
1295int
1296ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1297 int lun, u_int tag, role_t role, uint32_t status)
1298{
e4e360c3 1299 return 0;
1da177e4
LT		 1300}
1301
cb624029 1302static u_int
1303ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1da177e4 1304{
cb624029 1305 static int warned_user;
1306 u_int tags;
1da177e4 1307
cb624029 1308 tags = 0;
1309 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
6391a113 1310 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
cb624029 1311 if (warned_user == 0) {
1da177e4 1312
cb624029 1313 printf(KERN_WARNING
1314"aic7xxx: WARNING: Insufficient tag_info instances\n"
1315"aic7xxx: for installed controllers. Using defaults\n"
1316"aic7xxx: Please update the aic7xxx_tag_info array in\n"
1317"aic7xxx: the aic7xxx_osm..c source file.\n");
1318 warned_user++;
1319 }
1320 tags = AHC_MAX_QUEUE;
1321 } else {
1322 adapter_tag_info_t *tag_info;
1da177e4 1323
cb624029 1324 tag_info = &aic7xxx_tag_info[ahc->unit];
1325 tags = tag_info->tag_commands[devinfo->target_offset];
1326 if (tags > AHC_MAX_QUEUE)
1327 tags = AHC_MAX_QUEUE;
1328 }
1da177e4 1329 }
cb624029 1330 return (tags);
1da177e4
LT		 1331}
1332
cb624029 1333/*
1334 * Determines the queue depth for a given device.
1335 */
1da177e4 1336static void
b1abb4d6 1337ahc_linux_device_queue_depth(struct scsi_device *sdev)
1da177e4 1338{
cb624029 1339 struct ahc_devinfo devinfo;
1340 u_int tags;
b1abb4d6 1341 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1da177e4 1342
cb624029 1343 ahc_compile_devinfo(&devinfo,
b1abb4d6 1344 sdev->sdev_target->channel == 0
cb624029 1345 ? ahc->our_id : ahc->our_id_b,
b1abb4d6
JB		 1346 sdev->sdev_target->id, sdev->lun,
1347 sdev->sdev_target->channel == 0 ? 'A' : 'B',
cb624029 1348 ROLE_INITIATOR);
1349 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
b1abb4d6 1350 if (tags != 0 && sdev->tagged_supported != 0) {
1da177e4 1351
9080063f
HR		 1352 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1353 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1354 devinfo.lun, AC_TRANSFER_NEG);
cb624029 1355 ahc_print_devinfo(ahc, &devinfo);
1356 printf("Tagged Queuing enabled. Depth %d\n", tags);
1da177e4 1357 } else {
9080063f
HR		 1358 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1359 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1360 devinfo.lun, AC_TRANSFER_NEG);
1da177e4
LT		 1361 }
1362}
1363
e4e360c3
JB		 1364static int
1365ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1366 struct scsi_cmnd *cmd)
1da177e4 1367{
cb624029 1368 struct scb *scb;
1369 struct hardware_scb *hscb;
1370 struct ahc_initiator_tinfo *tinfo;
1371 struct ahc_tmode_tstate *tstate;
1372 uint16_t mask;
e4e360c3 1373 struct scb_tailq *untagged_q = NULL;
3a57c4a5 1374 int nseg;
1da177e4 1375
e4e360c3
JB		 1376 /*
1377 * Schedule us to run later. The only reason we are not
1378 * running is because the whole controller Q is frozen.
1379 */
1380 if (ahc->platform_data->qfrozen != 0)
1381 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1382
e4e360c3
JB		 1383 /*
1384 * We only allow one untagged transaction
1385 * per target in the initiator role unless
1386 * we are storing a full busy target *lun*
1387 * table in SCB space.
1388 */
1389 if (!blk_rq_tagged(cmd->request)
1390 && (ahc->features & AHC_SCB_BTT) == 0) {
1391 int target_offset;
1da177e4 1392
e4e360c3
JB		 1393 target_offset = cmd->device->id + cmd->device->channel * 8;
1394 untagged_q = &(ahc->untagged_queues[target_offset]);
1395 if (!TAILQ_EMPTY(untagged_q))
1396 /* if we're already executing an untagged command
1397 * we're busy to another */
1398 return SCSI_MLQUEUE_DEVICE_BUSY;
1399 }
1400
1401 /*
1402 * Get an scb to use.
1403 */
8eb37942
CH		 1404 scb = ahc_get_scb(ahc);
1405 if (!scb)
1406 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1407
e4e360c3
JB		 1408 scb->io_ctx = cmd;
1409 scb->platform_data->dev = dev;
1410 hscb = scb->hscb;
1411 cmd->host_scribble = (char *)scb;
1da177e4 1412
e4e360c3
JB		 1413 /*
1414 * Fill out basics of the HSCB.
1415 */
1416 hscb->control = 0;
1417 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1418 hscb->lun = cmd->device->lun;
1419 mask = SCB_GET_TARGET_MASK(ahc, scb);
1420 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1421 SCB_GET_OUR_ID(scb),
1422 SCB_GET_TARGET(ahc, scb), &tstate);
1423 hscb->scsirate = tinfo->scsirate;
1424 hscb->scsioffset = tinfo->curr.offset;
1425 if ((tstate->ultraenb & mask) != 0)
1426 hscb->control |= ULTRAENB;
1427
1428 if ((ahc->user_discenable & mask) != 0)
1429 hscb->control |= DISCENB;
1430
1431 if ((tstate->auto_negotiate & mask) != 0) {
1432 scb->flags |= SCB_AUTO_NEGOTIATE;
1433 scb->hscb->control |= MK_MESSAGE;
1434 }
1435
1436 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
e4e360c3
JB		 1437 int msg_bytes;
1438 uint8_t tag_msgs[2];
1439
1440 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1441 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1442 hscb->control |= tag_msgs[0];
1443 if (tag_msgs[0] == MSG_ORDERED_TASK)
cb624029 1444 dev->commands_since_idle_or_otag = 0;
dedd8310
CH		 1445 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1446 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
e4e360c3
JB		 1447 hscb->control |= MSG_ORDERED_TASK;
1448 dev->commands_since_idle_or_otag = 0;
cb624029 1449 } else {
e4e360c3 1450 hscb->control |= MSG_SIMPLE_TASK;
cb624029 1451 }
e4e360c3 1452 }
1da177e4 1453
e4e360c3
JB		 1454 hscb->cdb_len = cmd->cmd_len;
1455 if (hscb->cdb_len <= 12) {
1456 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1457 } else {
1458 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1459 scb->flags |= SCB_CDB32_PTR;
1460 }
1da177e4 1461
e4e360c3
JB		 1462 scb->platform_data->xfer_len = 0;
1463 ahc_set_residual(scb, 0);
1464 ahc_set_sense_residual(scb, 0);
1465 scb->sg_count = 0;
3a57c4a5
FT		 1466
1467 nseg = scsi_dma_map(cmd);
1468 BUG_ON(nseg < 0);
1469 if (nseg > 0) {
e4e360c3
JB		 1470 struct ahc_dma_seg *sg;
1471 struct scatterlist *cur_seg;
3a57c4a5 1472 int i;
e4e360c3 1473
e4e360c3
JB		 1474 /* Copy the segments into the SG list. */
1475 sg = scb->sg_list;
1476 /*
1477 * The sg_count may be larger than nseg if
1478 * a transfer crosses a 32bit page.
3a57c4a5
FT		 1479 */
1480 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1da177e4 1481 dma_addr_t addr;
e4e360c3
JB		 1482 bus_size_t len;
1483 int consumed;
1484
1485 addr = sg_dma_address(cur_seg);
1486 len = sg_dma_len(cur_seg);
1487 consumed = ahc_linux_map_seg(ahc, scb,
1488 sg, addr, len);
1489 sg += consumed;
1490 scb->sg_count += consumed;
1da177e4 1491 }
e4e360c3
JB		 1492 sg--;
1493 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4 1494
e4e360c3
JB		 1495 /*
1496 * Reset the sg list pointer.
1497 */
1498 scb->hscb->sgptr =
1499 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1500
1501 /*
1502 * Copy the first SG into the "current"
1503 * data pointer area.
1504 */
1505 scb->hscb->dataptr = scb->sg_list->addr;
1506 scb->hscb->datacnt = scb->sg_list->len;
e4e360c3
JB		 1507 } else {
1508 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1509 scb->hscb->dataptr = 0;
1510 scb->hscb->datacnt = 0;
1511 scb->sg_count = 0;
1512 }
1513
1514 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1515 dev->openings--;
1516 dev->active++;
1517 dev->commands_issued++;
1518 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1519 dev->commands_since_idle_or_otag++;
1520
1521 scb->flags |= SCB_ACTIVE;
1522 if (untagged_q) {
1523 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1524 scb->flags |= SCB_UNTAGGEDQ;
1da177e4 1525 }
e4e360c3
JB		 1526 ahc_queue_scb(ahc, scb);
1527 return 0;
1da177e4
LT		 1528}
1529
1530/*
1531 * SCSI controller interrupt handler.
1532 */
1533irqreturn_t
7d12e780 1534ahc_linux_isr(int irq, void *dev_id)
1da177e4
LT		 1535{
1536 struct ahc_softc *ahc;
1537 u_long flags;
1538 int ours;
1539
1540 ahc = (struct ahc_softc *) dev_id;
1541 ahc_lock(ahc, &flags);
1542 ours = ahc_intr(ahc);
1da177e4
LT		 1543 ahc_unlock(ahc, &flags);
1544 return IRQ_RETVAL(ours);
1545}
1546
1547void
1548ahc_platform_flushwork(struct ahc_softc *ahc)
1549{
1550
1da177e4
LT		 1551}
1552
1da177e4
LT		 1553void
1554ahc_send_async(struct ahc_softc *ahc, char channel,
9080063f 1555 u_int target, u_int lun, ac_code code)
1da177e4
LT		 1556{
1557 switch (code) {
1558 case AC_TRANSFER_NEG:
1559 {
1560 char buf[80];
b1abb4d6 1561 struct scsi_target *starget;
1da177e4
LT		 1562 struct ahc_linux_target *targ;
1563 struct info_str info;
1564 struct ahc_initiator_tinfo *tinfo;
1565 struct ahc_tmode_tstate *tstate;
1566 int target_offset;
b1abb4d6
JB		 1567 unsigned int target_ppr_options;
1568
1569 BUG_ON(target == CAM_TARGET_WILDCARD);
1da177e4
LT		 1570
1571 info.buffer = buf;
1572 info.length = sizeof(buf);
1573 info.offset = 0;
1574 info.pos = 0;
1575 tinfo = ahc_fetch_transinfo(ahc, channel,
1576 channel == 'A' ? ahc->our_id
1577 : ahc->our_id_b,
1578 target, &tstate);
1579
1580 /*
1581 * Don't bother reporting results while
1582 * negotiations are still pending.
1583 */
1584 if (tinfo->curr.period != tinfo->goal.period
1585 || tinfo->curr.width != tinfo->goal.width
1586 || tinfo->curr.offset != tinfo->goal.offset
1587 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1588 if (bootverbose == 0)
1589 break;
1590
1591 /*
1592 * Don't bother reporting results that
1593 * are identical to those last reported.
1594 */
1595 target_offset = target;
1596 if (channel == 'B')
1597 target_offset += 8;
b1abb4d6 1598 starget = ahc->platform_data->starget[target_offset];
fc789a93 1599 if (starget == NULL)
1da177e4 1600 break;
fc789a93 1601 targ = scsi_transport_target_data(starget);
b1abb4d6
JB		 1602
1603 target_ppr_options =
1604 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1605 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1606 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1607
1608 if (tinfo->curr.period == spi_period(starget)
1609 && tinfo->curr.width == spi_width(starget)
1610 && tinfo->curr.offset == spi_offset(starget)
1611 && tinfo->curr.ppr_options == target_ppr_options)
1da177e4
LT		 1612 if (bootverbose == 0)
1613 break;
1614
b1abb4d6
JB		 1615 spi_period(starget) = tinfo->curr.period;
1616 spi_width(starget) = tinfo->curr.width;
1617 spi_offset(starget) = tinfo->curr.offset;
f7ff898a
JB		 1618 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1619 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1620 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
b1abb4d6 1621 spi_display_xfer_agreement(starget);
1da177e4
LT		 1622 break;
1623 }
1624 case AC_SENT_BDR:
1625 {
1da177e4
LT		 1626 WARN_ON(lun != CAM_LUN_WILDCARD);
1627 scsi_report_device_reset(ahc->platform_data->host,
1628 channel - 'A', target);
1da177e4
LT		 1629 break;
1630 }
1631 case AC_BUS_RESET:
1632 if (ahc->platform_data->host != NULL) {
1633 scsi_report_bus_reset(ahc->platform_data->host,
1634 channel - 'A');
1635 }
1636 break;
1637 default:
1638 panic("ahc_send_async: Unexpected async event");
1639 }
1640}
1641
1642/*
1643 * Calls the higher level scsi done function and frees the scb.
1644 */
1645void
1646ahc_done(struct ahc_softc *ahc, struct scb *scb)
1647{
013791ee 1648 struct scsi_cmnd *cmd;
1da177e4
LT		 1649 struct ahc_linux_device *dev;
1650
1651 LIST_REMOVE(scb, pending_links);
1652 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1653 struct scb_tailq *untagged_q;
1654 int target_offset;
1655
1656 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1657 untagged_q = &(ahc->untagged_queues[target_offset]);
1658 TAILQ_REMOVE(untagged_q, scb, links.tqe);
e4e360c3 1659 BUG_ON(!TAILQ_EMPTY(untagged_q));
1da177e4
LT		 1660 }
1661
1662 if ((scb->flags & SCB_ACTIVE) == 0) {
1663 printf("SCB %d done'd twice\n", scb->hscb->tag);
1664 ahc_dump_card_state(ahc);
1665 panic("Stopping for safety");
1666 }
1667 cmd = scb->io_ctx;
1668 dev = scb->platform_data->dev;
1669 dev->active--;
1670 dev->openings++;
1671 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1672 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1673 dev->qfrozen--;
1674 }
1675 ahc_linux_unmap_scb(ahc, scb);
1676
1677 /*
1678 * Guard against stale sense data.
1679 * The Linux mid-layer assumes that sense
1680 * was retrieved anytime the first byte of
1681 * the sense buffer looks "sane".
1682 */
1683 cmd->sense_buffer[0] = 0;
1684 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1685 uint32_t amount_xferred;
1686
1687 amount_xferred =
1688 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1689 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1690#ifdef AHC_DEBUG
1691 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1692 ahc_print_path(ahc, scb);
1693 printf("Set CAM_UNCOR_PARITY\n");
1694 }
1695#endif
1696 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1697#ifdef AHC_REPORT_UNDERFLOWS
1698 /*
1699 * This code is disabled by default as some
1700 * clients of the SCSI system do not properly
1701 * initialize the underflow parameter. This
1702 * results in spurious termination of commands
1703 * that complete as expected (e.g. underflow is
1704 * allowed as command can return variable amounts
1705 * of data.
1706 */
1707 } else if (amount_xferred < scb->io_ctx->underflow) {
1708 u_int i;
1709
1710 ahc_print_path(ahc, scb);
1711 printf("CDB:");
1712 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1713 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1714 printf("\n");
1715 ahc_print_path(ahc, scb);
1716 printf("Saw underflow (%ld of %ld bytes). "
1717 "Treated as error\n",
1718 ahc_get_residual(scb),
1719 ahc_get_transfer_length(scb));
1720 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1721#endif
1722 } else {
1723 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1724 }
1725 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
b1abb4d6 1726 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1da177e4 1727 }
1da177e4
LT		 1728
1729 if (dev->openings == 1
1730 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1731 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1732 dev->tag_success_count++;
1733 /*
1734 * Some devices deal with temporary internal resource
1735 * shortages by returning queue full. When the queue
1736 * full occurrs, we throttle back. Slowly try to get
1737 * back to our previous queue depth.
1738 */
1739 if ((dev->openings + dev->active) < dev->maxtags
1740 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1741 dev->tag_success_count = 0;
1742 dev->openings++;
1743 }
1744
1745 if (dev->active == 0)
1746 dev->commands_since_idle_or_otag = 0;
1747
1da177e4
LT		 1748 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1749 printf("Recovery SCB completes\n");
1750 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1751 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1752 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
8cac8145
CH		 1753
1754 if (ahc->platform_data->eh_done)
1755 complete(ahc->platform_data->eh_done);
1da177e4
LT		 1756 }
1757
1758 ahc_free_scb(ahc, scb);
1759 ahc_linux_queue_cmd_complete(ahc, cmd);
1da177e4
LT		 1760}
1761
1762static void
1763ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
b1abb4d6 1764 struct scsi_device *sdev, struct scb *scb)
1da177e4
LT		 1765{
1766 struct ahc_devinfo devinfo;
b1abb4d6 1767 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1da177e4
LT		 1768
1769 ahc_compile_devinfo(&devinfo,
1770 ahc->our_id,
b1abb4d6
JB		 1771 sdev->sdev_target->id, sdev->lun,
1772 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1da177e4
LT		 1773 ROLE_INITIATOR);
1774
1775 /*
1776 * We don't currently trust the mid-layer to
1777 * properly deal with queue full or busy. So,
1778 * when one occurs, we tell the mid-layer to
1779 * unconditionally requeue the command to us
1780 * so that we can retry it ourselves. We also
1781 * implement our own throttling mechanism so
1782 * we don't clobber the device with too many
1783 * commands.
1784 */
1785 switch (ahc_get_scsi_status(scb)) {
1786 default:
1787 break;
1788 case SCSI_STATUS_CHECK_COND:
1789 case SCSI_STATUS_CMD_TERMINATED:
1790 {
013791ee 1791 struct scsi_cmnd *cmd;
1da177e4
LT		 1792
1793 /*
1794 * Copy sense information to the OS's cmd
1795 * structure if it is available.
1796 */
1797 cmd = scb->io_ctx;
1798 if (scb->flags & SCB_SENSE) {
1799 u_int sense_size;
1800
6d07cb71 1801 sense_size = min(sizeof(struct scsi_sense_data)
1da177e4 1802 - ahc_get_sense_residual(scb),
6d07cb71 1803 (u_long)sizeof(cmd->sense_buffer));
1da177e4
LT		 1804 memcpy(cmd->sense_buffer,
1805 ahc_get_sense_buf(ahc, scb), sense_size);
1806 if (sense_size < sizeof(cmd->sense_buffer))
1807 memset(&cmd->sense_buffer[sense_size], 0,
1808 sizeof(cmd->sense_buffer) - sense_size);
1809 cmd->result |= (DRIVER_SENSE << 24);
1810#ifdef AHC_DEBUG
1811 if (ahc_debug & AHC_SHOW_SENSE) {
1812 int i;
1813
1814 printf("Copied %d bytes of sense data:",
1815 sense_size);
1816 for (i = 0; i < sense_size; i++) {
1817 if ((i & 0xF) == 0)
1818 printf("\n");
1819 printf("0x%x ", cmd->sense_buffer[i]);
1820 }
1821 printf("\n");
1822 }
1823#endif
1824 }
1825 break;
1826 }
1827 case SCSI_STATUS_QUEUE_FULL:
1828 {
1829 /*
1830 * By the time the core driver has returned this
1831 * command, all other commands that were queued
1832 * to us but not the device have been returned.
1833 * This ensures that dev->active is equal to
1834 * the number of commands actually queued to
1835 * the device.
1836 */
1837 dev->tag_success_count = 0;
1838 if (dev->active != 0) {
1839 /*
1840 * Drop our opening count to the number
1841 * of commands currently outstanding.
1842 */
1843 dev->openings = 0;
1844/*
1845 ahc_print_path(ahc, scb);
1846 printf("Dropping tag count to %d\n", dev->active);
1847 */
1848 if (dev->active == dev->tags_on_last_queuefull) {
1849
1850 dev->last_queuefull_same_count++;
1851 /*
1852 * If we repeatedly see a queue full
1853 * at the same queue depth, this
1854 * device has a fixed number of tag
1855 * slots. Lock in this tag depth
1856 * so we stop seeing queue fulls from
1857 * this device.
1858 */
1859 if (dev->last_queuefull_same_count
1860 == AHC_LOCK_TAGS_COUNT) {
1861 dev->maxtags = dev->active;
1862 ahc_print_path(ahc, scb);
1863 printf("Locking max tag count at %d\n",
1864 dev->active);
1865 }
1866 } else {
1867 dev->tags_on_last_queuefull = dev->active;
1868 dev->last_queuefull_same_count = 0;
1869 }
1870 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1871 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
9080063f 1872 ahc_platform_set_tags(ahc, sdev, &devinfo,
1da177e4
LT		 1873 (dev->flags & AHC_DEV_Q_BASIC)
1874 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1875 break;
1876 }
1877 /*
1878 * Drop down to a single opening, and treat this
1879 * as if the target returned BUSY SCSI status.
1880 */
1881 dev->openings = 1;
1882 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
9080063f 1883 ahc_platform_set_tags(ahc, sdev, &devinfo,
1da177e4
LT		 1884 (dev->flags & AHC_DEV_Q_BASIC)
1885 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1da177e4
LT		 1886 break;
1887 }
1888 }
1889}
1890
1891static void
013791ee 1892ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1da177e4 1893{
1da177e4
LT		 1894 /*
1895 * Map CAM error codes into Linux Error codes. We
1896 * avoid the conversion so that the DV code has the
1897 * full error information available when making
1898 * state change decisions.
1899 */
cb624029 1900 {
1da177e4
LT		 1901 u_int new_status;
1902
1903 switch (ahc_cmd_get_transaction_status(cmd)) {
1904 case CAM_REQ_INPROG:
1905 case CAM_REQ_CMP:
1906 case CAM_SCSI_STATUS_ERROR:
1907 new_status = DID_OK;
1908 break;
1909 case CAM_REQ_ABORTED:
1910 new_status = DID_ABORT;
1911 break;
1912 case CAM_BUSY:
1913 new_status = DID_BUS_BUSY;
1914 break;
1915 case CAM_REQ_INVALID:
1916 case CAM_PATH_INVALID:
1917 new_status = DID_BAD_TARGET;
1918 break;
1919 case CAM_SEL_TIMEOUT:
1920 new_status = DID_NO_CONNECT;
1921 break;
1922 case CAM_SCSI_BUS_RESET:
1923 case CAM_BDR_SENT:
1924 new_status = DID_RESET;
1925 break;
1926 case CAM_UNCOR_PARITY:
1927 new_status = DID_PARITY;
1928 break;
1929 case CAM_CMD_TIMEOUT:
1930 new_status = DID_TIME_OUT;
1931 break;
1932 case CAM_UA_ABORT:
1933 case CAM_REQ_CMP_ERR:
1934 case CAM_AUTOSENSE_FAIL:
1935 case CAM_NO_HBA:
1936 case CAM_DATA_RUN_ERR:
1937 case CAM_UNEXP_BUSFREE:
1938 case CAM_SEQUENCE_FAIL:
1939 case CAM_CCB_LEN_ERR:
1940 case CAM_PROVIDE_FAIL:
1941 case CAM_REQ_TERMIO:
1942 case CAM_UNREC_HBA_ERROR:
1943 case CAM_REQ_TOO_BIG:
1944 new_status = DID_ERROR;
1945 break;
1946 case CAM_REQUEUE_REQ:
8e45ebcc 1947 new_status = DID_REQUEUE;
1da177e4
LT		 1948 break;
1949 default:
1950 /* We should never get here */
1951 new_status = DID_ERROR;
1952 break;
1953 }
1954
1955 ahc_cmd_set_transaction_status(cmd, new_status);
1956 }
1957
8e45ebcc 1958 cmd->scsi_done(cmd);
1da177e4
LT		 1959}
1960
1da177e4
LT		 1961static void
1962ahc_linux_freeze_simq(struct ahc_softc *ahc)
1963{
dacee84b
JB		 1964 unsigned long s;
1965
1966 ahc_lock(ahc, &s);
1da177e4
LT		 1967 ahc->platform_data->qfrozen++;
1968 if (ahc->platform_data->qfrozen == 1) {
1969 scsi_block_requests(ahc->platform_data->host);
1970
1971 /* XXX What about Twin channels? */
1972 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
1973 CAM_LUN_WILDCARD, SCB_LIST_NULL,
1974 ROLE_INITIATOR, CAM_REQUEUE_REQ);
1975 }
dacee84b 1976 ahc_unlock(ahc, &s);
1da177e4
LT		 1977}
1978
1979static void
dacee84b 1980ahc_linux_release_simq(struct ahc_softc *ahc)
1da177e4 1981{
1da177e4
LT		 1982 u_long s;
1983 int unblock_reqs;
1984
1da177e4
LT		 1985 unblock_reqs = 0;
1986 ahc_lock(ahc, &s);
1987 if (ahc->platform_data->qfrozen > 0)
1988 ahc->platform_data->qfrozen--;
1989 if (ahc->platform_data->qfrozen == 0)
1990 unblock_reqs = 1;
1da177e4
LT		 1991 ahc_unlock(ahc, &s);
1992 /*
1993 * There is still a race here. The mid-layer
1994 * should keep its own freeze count and use
1995 * a bottom half handler to run the queues
1996 * so we can unblock with our own lock held.
1997 */
1998 if (unblock_reqs)
1999 scsi_unblock_requests(ahc->platform_data->host);
2000}
2001
1da177e4 2002static int
013791ee 2003ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
1da177e4
LT		 2004{
2005 struct ahc_softc *ahc;
1da177e4
LT		 2006 struct ahc_linux_device *dev;
2007 struct scb *pending_scb;
1da177e4
LT		 2008 u_int saved_scbptr;
2009 u_int active_scb_index;
2010 u_int last_phase;
2011 u_int saved_scsiid;
2012 u_int cdb_byte;
2013 int retval;
2014 int was_paused;
2015 int paused;
2016 int wait;
2017 int disconnected;
6d5e9fd1 2018 unsigned long flags;
1da177e4
LT		 2019
2020 pending_scb = NULL;
2021 paused = FALSE;
2022 wait = FALSE;
2023 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
1da177e4 2024
017560fc 2025 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
1da177e4
LT		 2026 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2027
2028 printf("CDB:");
2029 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2030 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2031 printf("\n");
2032
6d5e9fd1 2033 ahc_lock(ahc, &flags);
8fa728a2 2034
1da177e4
LT		 2035 /*
2036 * First determine if we currently own this command.
2037 * Start by searching the device queue. If not found
2038 * there, check the pending_scb list. If not found
2039 * at all, and the system wanted us to just abort the
2040 * command, return success.
2041 */
b1abb4d6 2042 dev = scsi_transport_device_data(cmd->device);
1da177e4
LT		 2043
2044 if (dev == NULL) {
2045 /*
2046 * No target device for this command exists,
2047 * so we must not still own the command.
2048 */
2049 printf("%s:%d:%d:%d: Is not an active device\n",
2050 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2051 cmd->device->lun);
2052 retval = SUCCESS;
2053 goto no_cmd;
2054 }
2055
1da177e4
LT		 2056 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2057 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2058 cmd->device->channel + 'A',
2059 cmd->device->lun,
2060 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2061 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2062 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2063 cmd->device->lun);
2064 retval = SUCCESS;
2065 goto done;
2066 }
2067
2068 /*
2069 * See if we can find a matching cmd in the pending list.
2070 */
2071 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2072 if (pending_scb->io_ctx == cmd)
2073 break;
2074 }
2075
2076 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2077
2078 /* Any SCB for this device will do for a target reset */
2079 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
422c0d61
JG		 2080 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2081 scmd_channel(cmd) + 'A',
1da177e4 2082 CAM_LUN_WILDCARD,
dce20067 2083 SCB_LIST_NULL, ROLE_INITIATOR))
1da177e4
LT		 2084 break;
2085 }
2086 }
2087
2088 if (pending_scb == NULL) {
017560fc 2089 scmd_printk(KERN_INFO, cmd, "Command not found\n");
1da177e4
LT		 2090 goto no_cmd;
2091 }
2092
2093 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2094 /*
2095 * We can't queue two recovery actions using the same SCB
2096 */
2097 retval = FAILED;
2098 goto done;
2099 }
2100
2101 /*
2102 * Ensure that the card doesn't do anything
2103 * behind our back and that we didn't "just" miss
2104 * an interrupt that would affect this cmd.
2105 */
2106 was_paused = ahc_is_paused(ahc);
2107 ahc_pause_and_flushwork(ahc);
2108 paused = TRUE;
2109
2110 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
017560fc 2111 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
1da177e4
LT		 2112 goto no_cmd;
2113 }
2114
2115 printf("%s: At time of recovery, card was %spaused\n",
2116 ahc_name(ahc), was_paused ? "" : "not ");
2117 ahc_dump_card_state(ahc);
2118
2119 disconnected = TRUE;
2120 if (flag == SCB_ABORT) {
2121 if (ahc_search_qinfifo(ahc, cmd->device->id,
2122 cmd->device->channel + 'A',
2123 cmd->device->lun,
2124 pending_scb->hscb->tag,
2125 ROLE_INITIATOR, CAM_REQ_ABORTED,
2126 SEARCH_COMPLETE) > 0) {
2127 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2128 ahc_name(ahc), cmd->device->channel,
2129 cmd->device->id, cmd->device->lun);
2130 retval = SUCCESS;
2131 goto done;
2132 }
2133 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2134 cmd->device->channel + 'A',
2135 cmd->device->lun, pending_scb->hscb->tag,
2136 ROLE_INITIATOR, /*status*/0,
2137 SEARCH_COUNT) > 0) {
2138 disconnected = FALSE;
2139 }
2140
2141 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2142 struct scb *bus_scb;
2143
2144 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2145 if (bus_scb == pending_scb)
2146 disconnected = FALSE;
2147 else if (flag != SCB_ABORT
2148 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2149 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2150 disconnected = FALSE;
2151 }
2152
2153 /*
2154 * At this point, pending_scb is the scb associated with the
2155 * passed in command. That command is currently active on the
2156 * bus, is in the disconnected state, or we're hoping to find
2157 * a command for the same target active on the bus to abuse to
2158 * send a BDR. Queue the appropriate message based on which of
2159 * these states we are in.
2160 */
2161 last_phase = ahc_inb(ahc, LASTPHASE);
2162 saved_scbptr = ahc_inb(ahc, SCBPTR);
2163 active_scb_index = ahc_inb(ahc, SCB_TAG);
2164 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2165 if (last_phase != P_BUSFREE
2166 && (pending_scb->hscb->tag == active_scb_index
2167 || (flag == SCB_DEVICE_RESET
422c0d61 2168 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
1da177e4
LT		 2169
2170 /*
2171 * We're active on the bus, so assert ATN
2172 * and hope that the target responds.
2173 */
2174 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2175 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2176 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2177 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
017560fc 2178 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
1da177e4
LT		 2179 wait = TRUE;
2180 } else if (disconnected) {
2181
2182 /*
2183 * Actually re-queue this SCB in an attempt
2184 * to select the device before it reconnects.
2185 * In either case (selection or reselection),
2186 * we will now issue the approprate message
2187 * to the timed-out device.
2188 *
2189 * Set the MK_MESSAGE control bit indicating
2190 * that we desire to send a message. We
2191 * also set the disconnected flag since
2192 * in the paging case there is no guarantee
2193 * that our SCB control byte matches the
2194 * version on the card. We don't want the
2195 * sequencer to abort the command thinking
2196 * an unsolicited reselection occurred.
2197 */
2198 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2199 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2200
2201 /*
2202 * Remove any cached copy of this SCB in the
2203 * disconnected list in preparation for the
2204 * queuing of our abort SCB. We use the
2205 * same element in the SCB, SCB_NEXT, for
2206 * both the qinfifo and the disconnected list.
2207 */
2208 ahc_search_disc_list(ahc, cmd->device->id,
2209 cmd->device->channel + 'A',
2210 cmd->device->lun, pending_scb->hscb->tag,
2211 /*stop_on_first*/TRUE,
2212 /*remove*/TRUE,
2213 /*save_state*/FALSE);
2214
2215 /*
2216 * In the non-paging case, the sequencer will
2217 * never re-reference the in-core SCB.
2218 * To make sure we are notified during
2219 * reslection, set the MK_MESSAGE flag in
2220 * the card's copy of the SCB.
2221 */
2222 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2223 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2224 ahc_outb(ahc, SCB_CONTROL,
2225 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2226 }
2227
2228 /*
2229 * Clear out any entries in the QINFIFO first
2230 * so we are the next SCB for this target
2231 * to run.
2232 */
2233 ahc_search_qinfifo(ahc, cmd->device->id,
2234 cmd->device->channel + 'A',
2235 cmd->device->lun, SCB_LIST_NULL,
2236 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2237 SEARCH_COMPLETE);
2238 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2239 ahc_outb(ahc, SCBPTR, saved_scbptr);
2240 ahc_print_path(ahc, pending_scb);
2241 printf("Device is disconnected, re-queuing SCB\n");
2242 wait = TRUE;
2243 } else {
017560fc 2244 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
1da177e4
LT		 2245 retval = FAILED;
2246 goto done;
2247 }
2248
2249no_cmd:
2250 /*
2251 * Our assumption is that if we don't have the command, no
2252 * recovery action was required, so we return success. Again,
2253 * the semantics of the mid-layer recovery engine are not
2254 * well defined, so this may change in time.
2255 */
2256 retval = SUCCESS;
2257done:
2258 if (paused)
2259 ahc_unpause(ahc);
2260 if (wait) {
6e9a4738 2261 DECLARE_COMPLETION_ONSTACK(done);
1da177e4 2262
8cac8145 2263 ahc->platform_data->eh_done = &done;
6d5e9fd1
CH		 2264 ahc_unlock(ahc, &flags);
2265
1da177e4 2266 printf("Recovery code sleeping\n");
8cac8145
CH		 2267 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2268 ahc_lock(ahc, &flags);
2269 ahc->platform_data->eh_done = NULL;
2270 ahc_unlock(ahc, &flags);
2271
1da177e4
LT		 2272 printf("Timer Expired\n");
2273 retval = FAILED;
2274 }
8cac8145 2275 printf("Recovery code awake\n");
6d5e9fd1
CH		 2276 } else
2277 ahc_unlock(ahc, &flags);
1da177e4
LT		 2278 return (retval);
2279}
2280
2281void
2282ahc_platform_dump_card_state(struct ahc_softc *ahc)
2283{
1da177e4
LT		 2284}
2285
fad01ef8
JB		 2286static void ahc_linux_set_width(struct scsi_target *starget, int width)
2287{
2288 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2289 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2290 struct ahc_devinfo devinfo;
2291 unsigned long flags;
2292
2293 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2294 starget->channel + 'A', ROLE_INITIATOR);
2295 ahc_lock(ahc, &flags);
2296 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2297 ahc_unlock(ahc, &flags);
2298}
2299
92d161c3 2300static void ahc_linux_set_period(struct scsi_target *starget, int period)
2301{
2302 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2303 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2304 struct ahc_tmode_tstate *tstate;
2305 struct ahc_initiator_tinfo *tinfo
2306 = ahc_fetch_transinfo(ahc,
2307 starget->channel + 'A',
2308 shost->this_id, starget->id, &tstate);
2309 struct ahc_devinfo devinfo;
597487b9 2310 unsigned int ppr_options = tinfo->goal.ppr_options;
92d161c3 2311 unsigned long flags;
597487b9 2312 unsigned long offset = tinfo->goal.offset;
92d161c3 2313 struct ahc_syncrate *syncrate;
2314
2315 if (offset == 0)
2316 offset = MAX_OFFSET;
2317
2bf2c568
JB		 2318 if (period < 9)
2319 period = 9; /* 12.5ns is our minimum */
2320 if (period == 9)
2321 ppr_options |= MSG_EXT_PPR_DT_REQ;
2322
92d161c3 2323 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2324 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8
JB		 2325
2326 /* all PPR requests apart from QAS require wide transfers */
2327 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
fad01ef8
JB		 2328 if (spi_width(starget) == 0)
2329 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2330 }
2331
92d161c3 2332 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2333 ahc_lock(ahc, &flags);
2334 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2335 ppr_options, AHC_TRANS_GOAL, FALSE);
2336 ahc_unlock(ahc, &flags);
2337}
2338
92d161c3 2339static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2340{
2341 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2342 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2343 struct ahc_tmode_tstate *tstate;
2344 struct ahc_initiator_tinfo *tinfo
2345 = ahc_fetch_transinfo(ahc,
2346 starget->channel + 'A',
2347 shost->this_id, starget->id, &tstate);
2348 struct ahc_devinfo devinfo;
2349 unsigned int ppr_options = 0;
2350 unsigned int period = 0;
2351 unsigned long flags;
2352 struct ahc_syncrate *syncrate = NULL;
2353
2354 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2355 starget->channel + 'A', ROLE_INITIATOR);
2356 if (offset != 0) {
2357 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
597487b9
JB		 2358 period = tinfo->goal.period;
2359 ppr_options = tinfo->goal.ppr_options;
92d161c3 2360 }
2361 ahc_lock(ahc, &flags);
2362 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2363 ppr_options, AHC_TRANS_GOAL, FALSE);
2364 ahc_unlock(ahc, &flags);
2365}
2366
92d161c3 2367static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2368{
2369 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2370 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2371 struct ahc_tmode_tstate *tstate;
2372 struct ahc_initiator_tinfo *tinfo
2373 = ahc_fetch_transinfo(ahc,
2374 starget->channel + 'A',
2375 shost->this_id, starget->id, &tstate);
2376 struct ahc_devinfo devinfo;
597487b9 2377 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2378 & ~MSG_EXT_PPR_DT_REQ;
597487b9 2379 unsigned int period = tinfo->goal.period;
84e66ee7 2380 unsigned int width = tinfo->goal.width;
92d161c3 2381 unsigned long flags;
2382 struct ahc_syncrate *syncrate;
2383
2bf2c568 2384 if (dt) {
2bf2c568 2385 ppr_options |= MSG_EXT_PPR_DT_REQ;
84e66ee7
JB		 2386 if (!width)
2387 ahc_linux_set_width(starget, 1);
2388 } else if (period == 9)
2bf2c568
JB		 2389 period = 10; /* if resetting DT, period must be >= 25ns */
2390
92d161c3 2391 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2392 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2393 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
92d161c3 2394 ahc_lock(ahc, &flags);
597487b9 2395 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3 2396 ppr_options, AHC_TRANS_GOAL, FALSE);
2397 ahc_unlock(ahc, &flags);
2398}
2399
ace4e718
JB		 2400#if 0
2401/* FIXME: This code claims to support IU and QAS. However, the actual
2402 * sequencer code and aic7xxx_core have no support for these parameters and
2403 * will get into a bad state if they're negotiated. Do not enable this
2404 * unless you know what you're doing */
92d161c3 2405static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2406{
2407 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2408 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2409 struct ahc_tmode_tstate *tstate;
2410 struct ahc_initiator_tinfo *tinfo
2411 = ahc_fetch_transinfo(ahc,
2412 starget->channel + 'A',
2413 shost->this_id, starget->id, &tstate);
2414 struct ahc_devinfo devinfo;
597487b9 2415 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2416 & ~MSG_EXT_PPR_QAS_REQ;
597487b9 2417 unsigned int period = tinfo->goal.period;
92d161c3 2418 unsigned long flags;
2419 struct ahc_syncrate *syncrate;
2420
2421 if (qas)
2422 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2423
2424 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2425 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2426 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2427 ahc_lock(ahc, &flags);
597487b9 2428 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3 2429 ppr_options, AHC_TRANS_GOAL, FALSE);
2430 ahc_unlock(ahc, &flags);
2431}
2432
92d161c3 2433static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2434{
2435 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2436 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2437 struct ahc_tmode_tstate *tstate;
2438 struct ahc_initiator_tinfo *tinfo
2439 = ahc_fetch_transinfo(ahc,
2440 starget->channel + 'A',
2441 shost->this_id, starget->id, &tstate);
2442 struct ahc_devinfo devinfo;
597487b9 2443 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2444 & ~MSG_EXT_PPR_IU_REQ;
597487b9 2445 unsigned int period = tinfo->goal.period;
92d161c3 2446 unsigned long flags;
2447 struct ahc_syncrate *syncrate;
2448
2449 if (iu)
2450 ppr_options |= MSG_EXT_PPR_IU_REQ;
2451
2452 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2453 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2454 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2455 ahc_lock(ahc, &flags);
597487b9 2456 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3 2457 ppr_options, AHC_TRANS_GOAL, FALSE);
2458 ahc_unlock(ahc, &flags);
2459}
ace4e718 2460#endif
92d161c3 2461
b2d8bfe1
JB		 2462static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2463{
2464 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
cf2b5d3f 2465 unsigned long flags;
3e3c60e3 2466 u8 mode;
b2d8bfe1 2467
3e3c60e3
JB		 2468 if (!(ahc->features & AHC_ULTRA2)) {
2469 /* non-LVD chipset, may not have SBLKCTL reg */
b2d8bfe1
JB		 2470 spi_signalling(shost) =
2471 ahc->features & AHC_HVD ?
2472 SPI_SIGNAL_HVD :
2473 SPI_SIGNAL_SE;
3e3c60e3
JB		 2474 return;
2475 }
2476
cf2b5d3f
DL		 2477 ahc_lock(ahc, &flags);
2478 ahc_pause(ahc);
3e3c60e3 2479 mode = ahc_inb(ahc, SBLKCTL);
cf2b5d3f
DL		 2480 ahc_unpause(ahc);
2481 ahc_unlock(ahc, &flags);
3e3c60e3
JB		 2482
2483 if (mode & ENAB40)
2484 spi_signalling(shost) = SPI_SIGNAL_LVD;
2485 else if (mode & ENAB20)
2486 spi_signalling(shost) = SPI_SIGNAL_SE;
b2d8bfe1
JB		 2487 else
2488 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2489}
2490
92d161c3 2491static struct spi_function_template ahc_linux_transport_functions = {
92d161c3 2492 .set_offset = ahc_linux_set_offset,
2493 .show_offset = 1,
92d161c3 2494 .set_period = ahc_linux_set_period,
2495 .show_period = 1,
92d161c3 2496 .set_width = ahc_linux_set_width,
2497 .show_width = 1,
92d161c3 2498 .set_dt = ahc_linux_set_dt,
2499 .show_dt = 1,
ace4e718 2500#if 0
92d161c3 2501 .set_iu = ahc_linux_set_iu,
2502 .show_iu = 1,
92d161c3 2503 .set_qas = ahc_linux_set_qas,
2504 .show_qas = 1,
ace4e718 2505#endif
b2d8bfe1 2506 .get_signalling = ahc_linux_get_signalling,
92d161c3 2507};
2508
2509
2510
1da177e4
LT		 2511static int __init
2512ahc_linux_init(void)
2513{
dfd287f6
CH		 2514 /*
2515 * If we've been passed any parameters, process them now.
2516 */
2517 if (aic7xxx)
2518 aic7xxx_setup(aic7xxx);
2519
2520 ahc_linux_transport_template =
2521 spi_attach_transport(&ahc_linux_transport_functions);
92d161c3 2522 if (!ahc_linux_transport_template)
2523 return -ENODEV;
dfd287f6 2524
b1abb4d6
JB		 2525 scsi_transport_reserve_device(ahc_linux_transport_template,
2526 sizeof(struct ahc_linux_device));
dfd287f6 2527
dfd287f6
CH		 2528 ahc_linux_pci_init();
2529 ahc_linux_eisa_init();
2530 return 0;
1da177e4
LT		 2531}
2532
2533static void
2534ahc_linux_exit(void)
2535{
1da177e4
LT		 2536 ahc_linux_pci_exit();
2537 ahc_linux_eisa_exit();
92d161c3 2538 spi_release_transport(ahc_linux_transport_template);
1da177e4
LT		 2539}
2540
2541module_init(ahc_linux_init);
2542module_exit(ahc_linux_exit);
Linux 6.x block layer and io_uring tree(s)