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[SCSI] use scmd_id(), scmd_channel() throughout code
[deliverable/linux.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 */
331uint32_t aic7xxx_periodic_otag;
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,
344"period delimited, options string.\n"
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"
356" reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
357" tag_info:<tag_str> Set per-target tag depth\n"
358" global_tag_depth:<int> Global tag depth for every target\n"
359" on every bus\n"
1da177e4
LT		 360" seltime:<int> Selection Timeout\n"
361" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
362"\n"
363" Sample /etc/modprobe.conf line:\n"
364" Toggle EISA/VLB probing\n"
365" Set tag depth on Controller 1/Target 1 to 10 tags\n"
366" Shorten the selection timeout to 128ms\n"
367"\n"
368" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
369);
370
371static void ahc_linux_handle_scsi_status(struct ahc_softc *,
b1abb4d6 372 struct scsi_device *,
1da177e4
LT		 373 struct scb *);
374static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
013791ee 375 struct scsi_cmnd *cmd);
1da177e4
LT		 376static void ahc_linux_sem_timeout(u_long arg);
377static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
378static void ahc_linux_release_simq(u_long arg);
013791ee 379static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
1da177e4 380static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
1da177e4
LT		 381static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
382 struct ahc_devinfo *devinfo);
b1abb4d6 383static void ahc_linux_device_queue_depth(struct scsi_device *);
e4e360c3
JB		 384static int ahc_linux_run_command(struct ahc_softc*,
385 struct ahc_linux_device *,
386 struct scsi_cmnd *);
1da177e4 387static void ahc_linux_setup_tag_info_global(char *p);
1da177e4 388static int aic7xxx_setup(char *s);
2a40342e
CH		 389
390static int ahc_linux_unit;
391
1da177e4
LT		 392
393/********************************* Inlines ************************************/
1da177e4
LT		 394static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
395
396static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
397 struct ahc_dma_seg *sg,
398 dma_addr_t addr, bus_size_t len);
399
1da177e4
LT		 400static __inline void
401ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
402{
013791ee 403 struct scsi_cmnd *cmd;
1da177e4
LT		 404
405 cmd = scb->io_ctx;
406 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
407 if (cmd->use_sg != 0) {
408 struct scatterlist *sg;
409
410 sg = (struct scatterlist *)cmd->request_buffer;
411 pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg,
be7db055 412 cmd->sc_data_direction);
1da177e4
LT		 413 } else if (cmd->request_bufflen != 0) {
414 pci_unmap_single(ahc->dev_softc,
415 scb->platform_data->buf_busaddr,
416 cmd->request_bufflen,
be7db055 417 cmd->sc_data_direction);
1da177e4
LT		 418 }
419}
420
421static __inline int
422ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
423 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
424{
425 int consumed;
426
427 if ((scb->sg_count + 1) > AHC_NSEG)
428 panic("Too few segs for dma mapping. "
429 "Increase AHC_NSEG\n");
430
431 consumed = 1;
432 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
433 scb->platform_data->xfer_len += len;
434
435 if (sizeof(dma_addr_t) > 4
436 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
437 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
438
439 sg->len = ahc_htole32(len);
440 return (consumed);
441}
442
1da177e4
LT		 443/*
444 * Return a string describing the driver.
445 */
446static const char *
447ahc_linux_info(struct Scsi_Host *host)
448{
449 static char buffer[512];
450 char ahc_info[256];
451 char *bp;
452 struct ahc_softc *ahc;
453
454 bp = &buffer[0];
455 ahc = *(struct ahc_softc **)host->hostdata;
456 memset(bp, 0, sizeof(buffer));
457 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
458 strcat(bp, AIC7XXX_DRIVER_VERSION);
459 strcat(bp, "\n");
460 strcat(bp, " <");
461 strcat(bp, ahc->description);
462 strcat(bp, ">\n");
463 strcat(bp, " ");
464 ahc_controller_info(ahc, ahc_info);
465 strcat(bp, ahc_info);
466 strcat(bp, "\n");
467
468 return (bp);
469}
470
471/*
472 * Queue an SCB to the controller.
473 */
474static int
013791ee 475ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
1da177e4
LT		 476{
477 struct ahc_softc *ahc;
b1abb4d6 478 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
1da177e4
LT		 479
480 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
481
482 /*
483 * Save the callback on completion function.
484 */
485 cmd->scsi_done = scsi_done;
486
1da177e4
LT		 487 /*
488 * Close the race of a command that was in the process of
489 * being queued to us just as our simq was frozen. Let
490 * DV commands through so long as we are only frozen to
491 * perform DV.
492 */
e4e360c3
JB		 493 if (ahc->platform_data->qfrozen != 0)
494 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 495
1da177e4 496 cmd->result = CAM_REQ_INPROG << 16;
e4e360c3
JB		 497
498 return ahc_linux_run_command(ahc, dev, cmd);
1da177e4
LT		 499}
500
b1abb4d6
JB		 501static inline struct scsi_target **
502ahc_linux_target_in_softc(struct scsi_target *starget)
1da177e4 503{
b1abb4d6
JB		 504 struct ahc_softc *ahc =
505 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
fb3089df 506 unsigned int target_offset;
b1abb4d6
JB		 507
508 target_offset = starget->id;
509 if (starget->channel != 0)
510 target_offset += 8;
511
512 return &ahc->platform_data->starget[target_offset];
513}
514
515static int
516ahc_linux_target_alloc(struct scsi_target *starget)
517{
518 struct ahc_softc *ahc =
519 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
520 struct seeprom_config *sc = ahc->seep_config;
fb3089df 521 unsigned long flags;
b1abb4d6
JB		 522 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
523 struct ahc_linux_target *targ = scsi_transport_target_data(starget);
524 unsigned short scsirate;
525 struct ahc_devinfo devinfo;
526 struct ahc_initiator_tinfo *tinfo;
527 struct ahc_tmode_tstate *tstate;
528 char channel = starget->channel + 'A';
529 unsigned int our_id = ahc->our_id;
530 unsigned int target_offset;
c7525233
JB		 531
532 target_offset = starget->id;
533 if (starget->channel != 0)
534 target_offset += 8;
b1abb4d6
JB		 535
536 if (starget->channel)
537 our_id = ahc->our_id_b;
1da177e4 538
fb3089df 539 ahc_lock(ahc, &flags);
fb3089df 540
b1abb4d6 541 BUG_ON(*ahc_targp != NULL);
c7525233 542
b1abb4d6
JB		 543 *ahc_targp = starget;
544 memset(targ, 0, sizeof(*targ));
c7525233 545
b1abb4d6 546 if (sc) {
12021fff
JB		 547 int maxsync = AHC_SYNCRATE_DT;
548 int ultra = 0;
549 int flags = sc->device_flags[target_offset];
550
551 if (ahc->flags & AHC_NEWEEPROM_FMT) {
552 if (flags & CFSYNCHISULTRA)
553 ultra = 1;
554 } else if (flags & CFULTRAEN)
555 ultra = 1;
556 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
557 * change it to ultra=0, CFXFER = 0 */
558 if(ultra && (flags & CFXFER) == 0x04) {
559 ultra = 0;
560 flags &= ~CFXFER;
561 }
562
b1abb4d6 563 if ((ahc->features & AHC_ULTRA2) != 0) {
12021fff 564 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
b1abb4d6 565 } else {
12021fff
JB		 566 scsirate = (flags & CFXFER) << 4;
567 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
568 AHC_SYNCRATE_FAST;
c7525233 569 }
12021fff
JB		 570 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
571 if (!(flags & CFSYNCH))
572 spi_max_offset(starget) = 0;
b1abb4d6 573 spi_min_period(starget) =
12021fff
JB		 574 ahc_find_period(ahc, scsirate, maxsync);
575
b1abb4d6
JB		 576 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
577 starget->id, &tstate);
c7525233 578 }
b1abb4d6
JB		 579 ahc_compile_devinfo(&devinfo, our_id, starget->id,
580 CAM_LUN_WILDCARD, channel,
581 ROLE_INITIATOR);
582 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
583 AHC_TRANS_GOAL, /*paused*/FALSE);
584 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
585 AHC_TRANS_GOAL, /*paused*/FALSE);
fb3089df 586 ahc_unlock(ahc, &flags);
b1abb4d6
JB		 587
588 return 0;
589}
590
591static void
592ahc_linux_target_destroy(struct scsi_target *starget)
593{
594 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
595
596 *ahc_targp = NULL;
597}
598
599static int
600ahc_linux_slave_alloc(struct scsi_device *sdev)
601{
602 struct ahc_softc *ahc =
603 *((struct ahc_softc **)sdev->host->hostdata);
604 struct scsi_target *starget = sdev->sdev_target;
605 struct ahc_linux_target *targ = scsi_transport_target_data(starget);
606 struct ahc_linux_device *dev;
607
608 if (bootverbose)
609 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
610
611 BUG_ON(targ->sdev[sdev->lun] != NULL);
612
613 dev = scsi_transport_device_data(sdev);
614 memset(dev, 0, sizeof(*dev));
615
616 /*
617 * We start out life using untagged
618 * transactions of which we allow one.
619 */
620 dev->openings = 1;
621
622 /*
623 * Set maxtags to 0. This will be changed if we
624 * later determine that we are dealing with
625 * a tagged queuing capable device.
626 */
627 dev->maxtags = 0;
628
629 targ->sdev[sdev->lun] = sdev;
630
79778a27
JB		 631 spi_period(starget) = 0;
632
b1abb4d6 633 return 0;
1da177e4
LT		 634}
635
636static int
b1abb4d6 637ahc_linux_slave_configure(struct scsi_device *sdev)
1da177e4
LT		 638{
639 struct ahc_softc *ahc;
1da177e4 640
b1abb4d6 641 ahc = *((struct ahc_softc **)sdev->host->hostdata);
c7525233 642
1da177e4 643 if (bootverbose)
017560fc 644 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
c7525233 645
b1abb4d6 646 ahc_linux_device_queue_depth(sdev);
cb624029 647
648 /* Initial Domain Validation */
b1abb4d6
JB		 649 if (!spi_initial_dv(sdev->sdev_target))
650 spi_dv_device(sdev);
cb624029 651
c7525233 652 return 0;
1da177e4
LT		 653}
654
655static void
b1abb4d6 656ahc_linux_slave_destroy(struct scsi_device *sdev)
1da177e4
LT		 657{
658 struct ahc_softc *ahc;
b1abb4d6
JB		 659 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
660 struct ahc_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
1da177e4 661
b1abb4d6 662 ahc = *((struct ahc_softc **)sdev->host->hostdata);
1da177e4 663 if (bootverbose)
b1abb4d6 664 printf("%s: Slave Destroy %d\n", ahc_name(ahc), sdev->id);
c7525233
JB		 665
666 BUG_ON(dev->active);
667
b1abb4d6 668 targ->sdev[sdev->lun] = NULL;
1da177e4 669}
1da177e4
LT		 670
671#if defined(__i386__)
672/*
673 * Return the disk geometry for the given SCSI device.
674 */
675static int
1da177e4
LT		 676ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
677 sector_t capacity, int geom[])
678{
679 uint8_t *bh;
1da177e4
LT		 680 int heads;
681 int sectors;
682 int cylinders;
683 int ret;
684 int extended;
685 struct ahc_softc *ahc;
686 u_int channel;
687
688 ahc = *((struct ahc_softc **)sdev->host->hostdata);
422c0d61 689 channel = sdev_channel(sdev);
1da177e4 690
1da177e4 691 bh = scsi_bios_ptable(bdev);
1da177e4
LT		 692 if (bh) {
693 ret = scsi_partsize(bh, capacity,
694 &geom[2], &geom[0], &geom[1]);
1da177e4 695 kfree(bh);
1da177e4
LT		 696 if (ret != -1)
697 return (ret);
698 }
699 heads = 64;
700 sectors = 32;
701 cylinders = aic_sector_div(capacity, heads, sectors);
702
703 if (aic7xxx_extended != 0)
704 extended = 1;
705 else if (channel == 0)
706 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
707 else
708 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
709 if (extended && cylinders >= 1024) {
710 heads = 255;
711 sectors = 63;
712 cylinders = aic_sector_div(capacity, heads, sectors);
713 }
714 geom[0] = heads;
715 geom[1] = sectors;
716 geom[2] = cylinders;
717 return (0);
718}
719#endif
720
721/*
722 * Abort the current SCSI command(s).
723 */
724static int
013791ee 725ahc_linux_abort(struct scsi_cmnd *cmd)
1da177e4
LT		 726{
727 int error;
728
729 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
730 if (error != 0)
731 printf("aic7xxx_abort returns 0x%x\n", error);
732 return (error);
733}
734
735/*
736 * Attempt to send a target reset message to the device that timed out.
737 */
738static int
013791ee 739ahc_linux_dev_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 740{
741 int error;
742
743 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
744 if (error != 0)
745 printf("aic7xxx_dev_reset returns 0x%x\n", error);
746 return (error);
747}
748
749/*
750 * Reset the SCSI bus.
751 */
752static int
013791ee 753ahc_linux_bus_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 754{
755 struct ahc_softc *ahc;
1da177e4 756 int found;
68b3aa7c 757 unsigned long flags;
1da177e4
LT		 758
759 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
68b3aa7c
JG		 760
761 ahc_lock(ahc, &flags);
422c0d61 762 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
1da177e4 763 /*initiate reset*/TRUE);
68b3aa7c 764 ahc_unlock(ahc, &flags);
1da177e4
LT		 765
766 if (bootverbose)
767 printf("%s: SCSI bus reset delivered. "
768 "%d SCBs aborted.\n", ahc_name(ahc), found);
769
770 return SUCCESS;
771}
772
013791ee 773struct scsi_host_template aic7xxx_driver_template = {
1da177e4
LT		 774 .module = THIS_MODULE,
775 .name = "aic7xxx",
dfd287f6 776 .proc_name = "aic7xxx",
1da177e4
LT		 777 .proc_info = ahc_linux_proc_info,
778 .info = ahc_linux_info,
779 .queuecommand = ahc_linux_queue,
780 .eh_abort_handler = ahc_linux_abort,
781 .eh_device_reset_handler = ahc_linux_dev_reset,
782 .eh_bus_reset_handler = ahc_linux_bus_reset,
783#if defined(__i386__)
784 .bios_param = ahc_linux_biosparam,
785#endif
786 .can_queue = AHC_MAX_QUEUE,
787 .this_id = -1,
788 .cmd_per_lun = 2,
789 .use_clustering = ENABLE_CLUSTERING,
790 .slave_alloc = ahc_linux_slave_alloc,
791 .slave_configure = ahc_linux_slave_configure,
792 .slave_destroy = ahc_linux_slave_destroy,
b1abb4d6
JB		 793 .target_alloc = ahc_linux_target_alloc,
794 .target_destroy = ahc_linux_target_destroy,
1da177e4
LT		 795};
796
797/**************************** Tasklet Handler *********************************/
798
1da177e4
LT		 799/******************************** Macros **************************************/
800#define BUILD_SCSIID(ahc, cmd) \
801 ((((cmd)->device->id << TID_SHIFT) & TID) \
802 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
803 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
804
805/******************************** Bus DMA *************************************/
806int
807ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
808 bus_size_t alignment, bus_size_t boundary,
809 dma_addr_t lowaddr, dma_addr_t highaddr,
810 bus_dma_filter_t *filter, void *filterarg,
811 bus_size_t maxsize, int nsegments,
812 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
813{
814 bus_dma_tag_t dmat;
815
816 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
817 if (dmat == NULL)
818 return (ENOMEM);
819
820 /*
821 * Linux is very simplistic about DMA memory. For now don't
822 * maintain all specification information. Once Linux supplies
823 * better facilities for doing these operations, or the
824 * needs of this particular driver change, we might need to do
825 * more here.
826 */
827 dmat->alignment = alignment;
828 dmat->boundary = boundary;
829 dmat->maxsize = maxsize;
830 *ret_tag = dmat;
831 return (0);
832}
833
834void
835ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
836{
837 free(dmat, M_DEVBUF);
838}
839
840int
841ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
842 int flags, bus_dmamap_t *mapp)
843{
1da177e4 844 *vaddr = pci_alloc_consistent(ahc->dev_softc,
7dfa0f26 845 dmat->maxsize, mapp);
1da177e4 846 if (*vaddr == NULL)
7dfa0f26
CH		 847 return ENOMEM;
848 return 0;
1da177e4
LT		 849}
850
851void
852ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
853 void* vaddr, bus_dmamap_t map)
854{
855 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
7dfa0f26 856 vaddr, map);
1da177e4
LT		 857}
858
859int
860ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
861 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
862 void *cb_arg, int flags)
863{
864 /*
865 * Assume for now that this will only be used during
866 * initialization and not for per-transaction buffer mapping.
867 */
868 bus_dma_segment_t stack_sg;
869
7dfa0f26 870 stack_sg.ds_addr = map;
1da177e4
LT		 871 stack_sg.ds_len = dmat->maxsize;
872 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
873 return (0);
874}
875
876void
877ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
878{
1da177e4
LT		 879}
880
881int
882ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
883{
884 /* Nothing to do */
885 return (0);
886}
887
1da177e4
LT		 888static void
889ahc_linux_setup_tag_info_global(char *p)
890{
891 int tags, i, j;
892
893 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
894 printf("Setting Global Tags= %d\n", tags);
895
896 for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
897 for (j = 0; j < AHC_NUM_TARGETS; j++) {
898 aic7xxx_tag_info[i].tag_commands[j] = tags;
899 }
900 }
901}
902
903static void
904ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
905{
906
907 if ((instance >= 0) && (targ >= 0)
908 && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
909 && (targ < AHC_NUM_TARGETS)) {
910 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
911 if (bootverbose)
912 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
913 }
914}
915
1ff92730
CH		 916static char *
917ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
918 void (*callback)(u_long, int, int, int32_t),
919 u_long callback_arg)
920{
921 char *tok_end;
922 char *tok_end2;
923 int i;
924 int instance;
925 int targ;
926 int done;
927 char tok_list[] = {'.', ',', '{', '}', '\0'};
928
929 /* All options use a ':' name/arg separator */
930 if (*opt_arg != ':')
931 return (opt_arg);
932 opt_arg++;
933 instance = -1;
934 targ = -1;
935 done = FALSE;
936 /*
937 * Restore separator that may be in
938 * the middle of our option argument.
939 */
940 tok_end = strchr(opt_arg, '\0');
941 if (tok_end < end)
942 *tok_end = ',';
943 while (!done) {
944 switch (*opt_arg) {
945 case '{':
946 if (instance == -1) {
947 instance = 0;
948 } else {
949 if (depth > 1) {
950 if (targ == -1)
951 targ = 0;
952 } else {
953 printf("Malformed Option %s\n",
954 opt_name);
955 done = TRUE;
956 }
957 }
958 opt_arg++;
959 break;
960 case '}':
961 if (targ != -1)
962 targ = -1;
963 else if (instance != -1)
964 instance = -1;
965 opt_arg++;
966 break;
967 case ',':
968 case '.':
969 if (instance == -1)
970 done = TRUE;
971 else if (targ >= 0)
972 targ++;
973 else if (instance >= 0)
974 instance++;
975 opt_arg++;
976 break;
977 case '\0':
978 done = TRUE;
979 break;
980 default:
981 tok_end = end;
982 for (i = 0; tok_list[i]; i++) {
983 tok_end2 = strchr(opt_arg, tok_list[i]);
984 if ((tok_end2) && (tok_end2 < tok_end))
985 tok_end = tok_end2;
986 }
987 callback(callback_arg, instance, targ,
988 simple_strtol(opt_arg, NULL, 0));
989 opt_arg = tok_end;
990 break;
991 }
992 }
993 return (opt_arg);
994}
995
1da177e4
LT		 996/*
997 * Handle Linux boot parameters. This routine allows for assigning a value
998 * to a parameter with a ':' between the parameter and the value.
999 * ie. aic7xxx=stpwlev:1,extended
1000 */
1001static int
1002aic7xxx_setup(char *s)
1003{
1004 int i, n;
1005 char *p;
1006 char *end;
1007
1008 static struct {
1009 const char *name;
1010 uint32_t *flag;
1011 } options[] = {
1012 { "extended", &aic7xxx_extended },
1013 { "no_reset", &aic7xxx_no_reset },
1014 { "verbose", &aic7xxx_verbose },
1015 { "allow_memio", &aic7xxx_allow_memio},
1016#ifdef AHC_DEBUG
1017 { "debug", &ahc_debug },
1018#endif
1da177e4
LT		 1019 { "periodic_otag", &aic7xxx_periodic_otag },
1020 { "pci_parity", &aic7xxx_pci_parity },
1021 { "seltime", &aic7xxx_seltime },
1022 { "tag_info", NULL },
1023 { "global_tag_depth", NULL },
1024 { "dv", NULL }
1025 };
1026
1027 end = strchr(s, '\0');
1028
1029 /*
1030 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1031 * will never be 0 in this case.
1032 */
1033 n = 0;
1034
1035 while ((p = strsep(&s, ",.")) != NULL) {
1036 if (*p == '\0')
1037 continue;
1038 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1039
1040 n = strlen(options[i].name);
1041 if (strncmp(options[i].name, p, n) == 0)
1042 break;
1043 }
1044 if (i == NUM_ELEMENTS(options))
1045 continue;
1046
1047 if (strncmp(p, "global_tag_depth", n) == 0) {
1048 ahc_linux_setup_tag_info_global(p + n);
1049 } else if (strncmp(p, "tag_info", n) == 0) {
1ff92730 1050 s = ahc_parse_brace_option("tag_info", p + n, end,
1da177e4 1051 2, ahc_linux_setup_tag_info, 0);
1da177e4
LT		 1052 } else if (p[n] == ':') {
1053 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1054 } else if (strncmp(p, "verbose", n) == 0) {
1055 *(options[i].flag) = 1;
1056 } else {
1057 *(options[i].flag) ^= 0xFFFFFFFF;
1058 }
1059 }
1060 return 1;
1061}
1062
1063__setup("aic7xxx=", aic7xxx_setup);
1064
1065uint32_t aic7xxx_verbose;
1066
1067int
013791ee 1068ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1da177e4
LT		 1069{
1070 char buf[80];
1071 struct Scsi_Host *host;
1072 char *new_name;
1073 u_long s;
1da177e4
LT		 1074
1075 template->name = ahc->description;
1076 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1077 if (host == NULL)
1078 return (ENOMEM);
1079
1080 *((struct ahc_softc **)host->hostdata) = ahc;
1081 ahc_lock(ahc, &s);
1da177e4 1082 scsi_assign_lock(host, &ahc->platform_data->spin_lock);
1da177e4
LT		 1083 ahc->platform_data->host = host;
1084 host->can_queue = AHC_MAX_QUEUE;
1085 host->cmd_per_lun = 2;
1086 /* XXX No way to communicate the ID for multiple channels */
1087 host->this_id = ahc->our_id;
1088 host->irq = ahc->platform_data->irq;
1089 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1090 host->max_lun = AHC_NUM_LUNS;
1091 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1092 host->sg_tablesize = AHC_NSEG;
2a40342e 1093 ahc_set_unit(ahc, ahc_linux_unit++);
1da177e4
LT		 1094 sprintf(buf, "scsi%d", host->host_no);
1095 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1096 if (new_name != NULL) {
1097 strcpy(new_name, buf);
1098 ahc_set_name(ahc, new_name);
1099 }
1100 host->unique_id = ahc->unit;
1da177e4 1101 ahc_linux_initialize_scsi_bus(ahc);
1da177e4 1102 ahc_intr_enable(ahc, TRUE);
1da177e4
LT		 1103 ahc_unlock(ahc, &s);
1104
92d161c3 1105 host->transportt = ahc_linux_transport_template;
1106
1da177e4
LT		 1107 scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
1108 scsi_scan_host(host);
1da177e4
LT		 1109 return (0);
1110}
1111
1da177e4
LT		 1112/*
1113 * Place the SCSI bus into a known state by either resetting it,
1114 * or forcing transfer negotiations on the next command to any
1115 * target.
1116 */
1117void
1118ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1119{
1120 int i;
1121 int numtarg;
1122
1123 i = 0;
1124 numtarg = 0;
1125
1126 if (aic7xxx_no_reset != 0)
1127 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1128
1129 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1130 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1131 else
1132 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1133
1134 if ((ahc->features & AHC_TWIN) != 0) {
1135
1136 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1137 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1138 } else {
1139 if (numtarg == 0)
1140 i = 8;
1141 numtarg += 8;
1142 }
1143 }
1144
1145 /*
1146 * Force negotiation to async for all targets that
1147 * will not see an initial bus reset.
1148 */
1149 for (; i < numtarg; i++) {
1150 struct ahc_devinfo devinfo;
1151 struct ahc_initiator_tinfo *tinfo;
1152 struct ahc_tmode_tstate *tstate;
1153 u_int our_id;
1154 u_int target_id;
1155 char channel;
1156
1157 channel = 'A';
1158 our_id = ahc->our_id;
1159 target_id = i;
1160 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1161 channel = 'B';
1162 our_id = ahc->our_id_b;
1163 target_id = i % 8;
1164 }
1165 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1166 target_id, &tstate);
1167 ahc_compile_devinfo(&devinfo, our_id, target_id,
1168 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1169 ahc_update_neg_request(ahc, &devinfo, tstate,
1170 tinfo, AHC_NEG_ALWAYS);
1171 }
1172 /* Give the bus some time to recover */
1173 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1174 ahc_linux_freeze_simq(ahc);
1175 init_timer(&ahc->platform_data->reset_timer);
1176 ahc->platform_data->reset_timer.data = (u_long)ahc;
1177 ahc->platform_data->reset_timer.expires =
1178 jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
1179 ahc->platform_data->reset_timer.function =
1180 ahc_linux_release_simq;
1181 add_timer(&ahc->platform_data->reset_timer);
1182 }
1183}
1184
1185int
1186ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1187{
1188
1189 ahc->platform_data =
1190 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1191 if (ahc->platform_data == NULL)
1192 return (ENOMEM);
1193 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1da177e4 1194 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1da177e4 1195 ahc_lockinit(ahc);
1da177e4 1196 init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
1da177e4
LT		 1197 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1198 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1199 if (aic7xxx_pci_parity == 0)
1200 ahc->flags |= AHC_DISABLE_PCI_PERR;
1201
1202 return (0);
1203}
1204
1205void
1206ahc_platform_free(struct ahc_softc *ahc)
1207{
b1abb4d6 1208 struct scsi_target *starget;
1da177e4
LT		 1209 int i, j;
1210
1211 if (ahc->platform_data != NULL) {
1da177e4
LT		 1212 /* destroy all of the device and target objects */
1213 for (i = 0; i < AHC_NUM_TARGETS; i++) {
b1abb4d6
JB		 1214 starget = ahc->platform_data->starget[i];
1215 if (starget != NULL) {
1da177e4 1216 for (j = 0; j < AHC_NUM_LUNS; j++) {
b1abb4d6
JB		 1217 struct ahc_linux_target *targ =
1218 scsi_transport_target_data(starget);
1da177e4 1219
b1abb4d6 1220 if (targ->sdev[j] == NULL)
1da177e4 1221 continue;
b1abb4d6 1222 targ->sdev[j] = NULL;
1da177e4 1223 }
b1abb4d6 1224 ahc->platform_data->starget[i] = NULL;
1da177e4
LT		 1225 }
1226 }
1227
1228 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1229 free_irq(ahc->platform_data->irq, ahc);
1230 if (ahc->tag == BUS_SPACE_PIO
1231 && ahc->bsh.ioport != 0)
1232 release_region(ahc->bsh.ioport, 256);
1233 if (ahc->tag == BUS_SPACE_MEMIO
1234 && ahc->bsh.maddr != NULL) {
1235 iounmap(ahc->bsh.maddr);
1236 release_mem_region(ahc->platform_data->mem_busaddr,
1237 0x1000);
1238 }
dedd8310 1239
97af50f6
JB		 1240 if (ahc->platform_data->host)
1241 scsi_host_put(ahc->platform_data->host);
1242
1da177e4
LT		 1243 free(ahc->platform_data, M_DEVBUF);
1244 }
1245}
1246
1247void
1248ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1249{
1250 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1251 SCB_GET_CHANNEL(ahc, scb),
1252 SCB_GET_LUN(scb), SCB_LIST_NULL,
1253 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1254}
1255
1256void
1257ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1258 ahc_queue_alg alg)
1259{
b1abb4d6
JB		 1260 struct scsi_target *starget;
1261 struct ahc_linux_target *targ;
1da177e4 1262 struct ahc_linux_device *dev;
b1abb4d6
JB		 1263 struct scsi_device *sdev;
1264 u_int target_offset;
1da177e4
LT		 1265 int was_queuing;
1266 int now_queuing;
1267
b1abb4d6
JB		 1268 target_offset = devinfo->target;
1269 if (devinfo->channel != 'A')
1270 target_offset += 8;
1271 starget = ahc->platform_data->starget[target_offset];
1272 targ = scsi_transport_target_data(starget);
1273 BUG_ON(targ == NULL);
1274 sdev = targ->sdev[devinfo->lun];
1275 if (sdev == NULL)
1da177e4 1276 return;
b1abb4d6
JB		 1277 dev = scsi_transport_device_data(sdev);
1278
1da177e4
LT		 1279 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1280 switch (alg) {
1281 default:
1282 case AHC_QUEUE_NONE:
1283 now_queuing = 0;
1284 break;
1285 case AHC_QUEUE_BASIC:
1286 now_queuing = AHC_DEV_Q_BASIC;
1287 break;
1288 case AHC_QUEUE_TAGGED:
1289 now_queuing = AHC_DEV_Q_TAGGED;
1290 break;
1291 }
1292 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1293 && (was_queuing != now_queuing)
1294 && (dev->active != 0)) {
1295 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1296 dev->qfrozen++;
1297 }
1298
1299 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1300 if (now_queuing) {
1301 u_int usertags;
1302
1303 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1304 if (!was_queuing) {
1305 /*
1306 * Start out agressively and allow our
1307 * dynamic queue depth algorithm to take
1308 * care of the rest.
1309 */
1310 dev->maxtags = usertags;
1311 dev->openings = dev->maxtags - dev->active;
1312 }
1313 if (dev->maxtags == 0) {
1314 /*
1315 * Queueing is disabled by the user.
1316 */
1317 dev->openings = 1;
1318 } else if (alg == AHC_QUEUE_TAGGED) {
1319 dev->flags |= AHC_DEV_Q_TAGGED;
1320 if (aic7xxx_periodic_otag != 0)
1321 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1322 } else
1323 dev->flags |= AHC_DEV_Q_BASIC;
1324 } else {
1325 /* We can only have one opening. */
1326 dev->maxtags = 0;
1327 dev->openings = 1 - dev->active;
1328 }
b1abb4d6
JB		 1329 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1330 case AHC_DEV_Q_BASIC:
fdd0edf2
JB		 1331 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
1332 scsi_activate_tcq(sdev, dev->openings + dev->active);
b1abb4d6
JB		 1333 break;
1334 case AHC_DEV_Q_TAGGED:
fdd0edf2
JB		 1335 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
1336 scsi_activate_tcq(sdev, dev->openings + dev->active);
b1abb4d6
JB		 1337 break;
1338 default:
1339 /*
1340 * We allow the OS to queue 2 untagged transactions to
1341 * us at any time even though we can only execute them
1342 * serially on the controller/device. This should
1343 * remove some latency.
1344 */
fdd0edf2 1345 scsi_deactivate_tcq(sdev, 2);
b1abb4d6 1346 break;
1da177e4 1347 }
1da177e4
LT		 1348}
1349
1350int
1351ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1352 int lun, u_int tag, role_t role, uint32_t status)
1353{
e4e360c3 1354 return 0;
1da177e4
LT		 1355}
1356
cb624029 1357static u_int
1358ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1da177e4 1359{
cb624029 1360 static int warned_user;
1361 u_int tags;
1da177e4 1362
cb624029 1363 tags = 0;
1364 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1365 if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
1366 if (warned_user == 0) {
1da177e4 1367
cb624029 1368 printf(KERN_WARNING
1369"aic7xxx: WARNING: Insufficient tag_info instances\n"
1370"aic7xxx: for installed controllers. Using defaults\n"
1371"aic7xxx: Please update the aic7xxx_tag_info array in\n"
1372"aic7xxx: the aic7xxx_osm..c source file.\n");
1373 warned_user++;
1374 }
1375 tags = AHC_MAX_QUEUE;
1376 } else {
1377 adapter_tag_info_t *tag_info;
1da177e4 1378
cb624029 1379 tag_info = &aic7xxx_tag_info[ahc->unit];
1380 tags = tag_info->tag_commands[devinfo->target_offset];
1381 if (tags > AHC_MAX_QUEUE)
1382 tags = AHC_MAX_QUEUE;
1383 }
1da177e4 1384 }
cb624029 1385 return (tags);
1da177e4
LT		 1386}
1387
cb624029 1388/*
1389 * Determines the queue depth for a given device.
1390 */
1da177e4 1391static void
b1abb4d6 1392ahc_linux_device_queue_depth(struct scsi_device *sdev)
1da177e4 1393{
cb624029 1394 struct ahc_devinfo devinfo;
1395 u_int tags;
b1abb4d6 1396 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1da177e4 1397
cb624029 1398 ahc_compile_devinfo(&devinfo,
b1abb4d6 1399 sdev->sdev_target->channel == 0
cb624029 1400 ? ahc->our_id : ahc->our_id_b,
b1abb4d6
JB		 1401 sdev->sdev_target->id, sdev->lun,
1402 sdev->sdev_target->channel == 0 ? 'A' : 'B',
cb624029 1403 ROLE_INITIATOR);
1404 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
b1abb4d6 1405 if (tags != 0 && sdev->tagged_supported != 0) {
1da177e4 1406
cb624029 1407 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
1408 ahc_print_devinfo(ahc, &devinfo);
1409 printf("Tagged Queuing enabled. Depth %d\n", tags);
1da177e4 1410 } else {
cb624029 1411 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
1da177e4
LT		 1412 }
1413}
1414
e4e360c3
JB		 1415static int
1416ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1417 struct scsi_cmnd *cmd)
1da177e4 1418{
cb624029 1419 struct scb *scb;
1420 struct hardware_scb *hscb;
1421 struct ahc_initiator_tinfo *tinfo;
1422 struct ahc_tmode_tstate *tstate;
1423 uint16_t mask;
e4e360c3 1424 struct scb_tailq *untagged_q = NULL;
1da177e4 1425
e4e360c3
JB		 1426 /*
1427 * Schedule us to run later. The only reason we are not
1428 * running is because the whole controller Q is frozen.
1429 */
1430 if (ahc->platform_data->qfrozen != 0)
1431 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1432
e4e360c3
JB		 1433 /*
1434 * We only allow one untagged transaction
1435 * per target in the initiator role unless
1436 * we are storing a full busy target *lun*
1437 * table in SCB space.
1438 */
1439 if (!blk_rq_tagged(cmd->request)
1440 && (ahc->features & AHC_SCB_BTT) == 0) {
1441 int target_offset;
1da177e4 1442
e4e360c3
JB		 1443 target_offset = cmd->device->id + cmd->device->channel * 8;
1444 untagged_q = &(ahc->untagged_queues[target_offset]);
1445 if (!TAILQ_EMPTY(untagged_q))
1446 /* if we're already executing an untagged command
1447 * we're busy to another */
1448 return SCSI_MLQUEUE_DEVICE_BUSY;
1449 }
1450
1451 /*
1452 * Get an scb to use.
1453 */
8eb37942
CH		 1454 scb = ahc_get_scb(ahc);
1455 if (!scb)
1456 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1457
e4e360c3
JB		 1458 scb->io_ctx = cmd;
1459 scb->platform_data->dev = dev;
1460 hscb = scb->hscb;
1461 cmd->host_scribble = (char *)scb;
1da177e4 1462
e4e360c3
JB		 1463 /*
1464 * Fill out basics of the HSCB.
1465 */
1466 hscb->control = 0;
1467 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1468 hscb->lun = cmd->device->lun;
1469 mask = SCB_GET_TARGET_MASK(ahc, scb);
1470 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1471 SCB_GET_OUR_ID(scb),
1472 SCB_GET_TARGET(ahc, scb), &tstate);
1473 hscb->scsirate = tinfo->scsirate;
1474 hscb->scsioffset = tinfo->curr.offset;
1475 if ((tstate->ultraenb & mask) != 0)
1476 hscb->control |= ULTRAENB;
1477
1478 if ((ahc->user_discenable & mask) != 0)
1479 hscb->control |= DISCENB;
1480
1481 if ((tstate->auto_negotiate & mask) != 0) {
1482 scb->flags |= SCB_AUTO_NEGOTIATE;
1483 scb->hscb->control |= MK_MESSAGE;
1484 }
1485
1486 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
e4e360c3
JB		 1487 int msg_bytes;
1488 uint8_t tag_msgs[2];
1489
1490 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1491 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1492 hscb->control |= tag_msgs[0];
1493 if (tag_msgs[0] == MSG_ORDERED_TASK)
cb624029 1494 dev->commands_since_idle_or_otag = 0;
dedd8310
CH		 1495 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1496 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
e4e360c3
JB		 1497 hscb->control |= MSG_ORDERED_TASK;
1498 dev->commands_since_idle_or_otag = 0;
cb624029 1499 } else {
e4e360c3 1500 hscb->control |= MSG_SIMPLE_TASK;
cb624029 1501 }
e4e360c3 1502 }
1da177e4 1503
e4e360c3
JB		 1504 hscb->cdb_len = cmd->cmd_len;
1505 if (hscb->cdb_len <= 12) {
1506 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1507 } else {
1508 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1509 scb->flags |= SCB_CDB32_PTR;
1510 }
1da177e4 1511
e4e360c3
JB		 1512 scb->platform_data->xfer_len = 0;
1513 ahc_set_residual(scb, 0);
1514 ahc_set_sense_residual(scb, 0);
1515 scb->sg_count = 0;
1516 if (cmd->use_sg != 0) {
1517 struct ahc_dma_seg *sg;
1518 struct scatterlist *cur_seg;
1519 struct scatterlist *end_seg;
1520 int nseg;
1521
1522 cur_seg = (struct scatterlist *)cmd->request_buffer;
1523 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
1524 cmd->sc_data_direction);
1525 end_seg = cur_seg + nseg;
1526 /* Copy the segments into the SG list. */
1527 sg = scb->sg_list;
1528 /*
1529 * The sg_count may be larger than nseg if
1530 * a transfer crosses a 32bit page.
1531 */
1532 while (cur_seg < end_seg) {
1da177e4 1533 dma_addr_t addr;
e4e360c3
JB		 1534 bus_size_t len;
1535 int consumed;
1536
1537 addr = sg_dma_address(cur_seg);
1538 len = sg_dma_len(cur_seg);
1539 consumed = ahc_linux_map_seg(ahc, scb,
1540 sg, addr, len);
1541 sg += consumed;
1542 scb->sg_count += consumed;
1543 cur_seg++;
1da177e4 1544 }
e4e360c3
JB		 1545 sg--;
1546 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4 1547
e4e360c3
JB		 1548 /*
1549 * Reset the sg list pointer.
1550 */
1551 scb->hscb->sgptr =
1552 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1553
1554 /*
1555 * Copy the first SG into the "current"
1556 * data pointer area.
1557 */
1558 scb->hscb->dataptr = scb->sg_list->addr;
1559 scb->hscb->datacnt = scb->sg_list->len;
1560 } else if (cmd->request_bufflen != 0) {
1561 struct ahc_dma_seg *sg;
1562 dma_addr_t addr;
1563
1564 sg = scb->sg_list;
1565 addr = pci_map_single(ahc->dev_softc,
1566 cmd->request_buffer,
1567 cmd->request_bufflen,
1568 cmd->sc_data_direction);
1569 scb->platform_data->buf_busaddr = addr;
1570 scb->sg_count = ahc_linux_map_seg(ahc, scb,
1571 sg, addr,
1572 cmd->request_bufflen);
1573 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4
LT		 1574
1575 /*
e4e360c3 1576 * Reset the sg list pointer.
1da177e4 1577 */
e4e360c3
JB		 1578 scb->hscb->sgptr =
1579 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1580
1581 /*
1582 * Copy the first SG into the "current"
1583 * data pointer area.
1584 */
1585 scb->hscb->dataptr = sg->addr;
1586 scb->hscb->datacnt = sg->len;
1587 } else {
1588 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1589 scb->hscb->dataptr = 0;
1590 scb->hscb->datacnt = 0;
1591 scb->sg_count = 0;
1592 }
1593
1594 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1595 dev->openings--;
1596 dev->active++;
1597 dev->commands_issued++;
1598 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1599 dev->commands_since_idle_or_otag++;
1600
1601 scb->flags |= SCB_ACTIVE;
1602 if (untagged_q) {
1603 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1604 scb->flags |= SCB_UNTAGGEDQ;
1da177e4 1605 }
e4e360c3
JB		 1606 ahc_queue_scb(ahc, scb);
1607 return 0;
1da177e4
LT		 1608}
1609
1610/*
1611 * SCSI controller interrupt handler.
1612 */
1613irqreturn_t
1614ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1615{
1616 struct ahc_softc *ahc;
1617 u_long flags;
1618 int ours;
1619
1620 ahc = (struct ahc_softc *) dev_id;
1621 ahc_lock(ahc, &flags);
1622 ours = ahc_intr(ahc);
1da177e4
LT		 1623 ahc_unlock(ahc, &flags);
1624 return IRQ_RETVAL(ours);
1625}
1626
1627void
1628ahc_platform_flushwork(struct ahc_softc *ahc)
1629{
1630
1da177e4
LT		 1631}
1632
1da177e4
LT		 1633void
1634ahc_send_async(struct ahc_softc *ahc, char channel,
1635 u_int target, u_int lun, ac_code code, void *arg)
1636{
1637 switch (code) {
1638 case AC_TRANSFER_NEG:
1639 {
1640 char buf[80];
b1abb4d6 1641 struct scsi_target *starget;
1da177e4
LT		 1642 struct ahc_linux_target *targ;
1643 struct info_str info;
1644 struct ahc_initiator_tinfo *tinfo;
1645 struct ahc_tmode_tstate *tstate;
1646 int target_offset;
b1abb4d6
JB		 1647 unsigned int target_ppr_options;
1648
1649 BUG_ON(target == CAM_TARGET_WILDCARD);
1da177e4
LT		 1650
1651 info.buffer = buf;
1652 info.length = sizeof(buf);
1653 info.offset = 0;
1654 info.pos = 0;
1655 tinfo = ahc_fetch_transinfo(ahc, channel,
1656 channel == 'A' ? ahc->our_id
1657 : ahc->our_id_b,
1658 target, &tstate);
1659
1660 /*
1661 * Don't bother reporting results while
1662 * negotiations are still pending.
1663 */
1664 if (tinfo->curr.period != tinfo->goal.period
1665 || tinfo->curr.width != tinfo->goal.width
1666 || tinfo->curr.offset != tinfo->goal.offset
1667 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1668 if (bootverbose == 0)
1669 break;
1670
1671 /*
1672 * Don't bother reporting results that
1673 * are identical to those last reported.
1674 */
1675 target_offset = target;
1676 if (channel == 'B')
1677 target_offset += 8;
b1abb4d6 1678 starget = ahc->platform_data->starget[target_offset];
fc789a93 1679 if (starget == NULL)
1da177e4 1680 break;
fc789a93 1681 targ = scsi_transport_target_data(starget);
b1abb4d6
JB		 1682
1683 target_ppr_options =
1684 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1685 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1686 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1687
1688 if (tinfo->curr.period == spi_period(starget)
1689 && tinfo->curr.width == spi_width(starget)
1690 && tinfo->curr.offset == spi_offset(starget)
1691 && tinfo->curr.ppr_options == target_ppr_options)
1da177e4
LT		 1692 if (bootverbose == 0)
1693 break;
1694
b1abb4d6
JB		 1695 spi_period(starget) = tinfo->curr.period;
1696 spi_width(starget) = tinfo->curr.width;
1697 spi_offset(starget) = tinfo->curr.offset;
f7ff898a
JB		 1698 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1699 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1700 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
b1abb4d6 1701 spi_display_xfer_agreement(starget);
1da177e4
LT		 1702 break;
1703 }
1704 case AC_SENT_BDR:
1705 {
1da177e4
LT		 1706 WARN_ON(lun != CAM_LUN_WILDCARD);
1707 scsi_report_device_reset(ahc->platform_data->host,
1708 channel - 'A', target);
1da177e4
LT		 1709 break;
1710 }
1711 case AC_BUS_RESET:
1712 if (ahc->platform_data->host != NULL) {
1713 scsi_report_bus_reset(ahc->platform_data->host,
1714 channel - 'A');
1715 }
1716 break;
1717 default:
1718 panic("ahc_send_async: Unexpected async event");
1719 }
1720}
1721
1722/*
1723 * Calls the higher level scsi done function and frees the scb.
1724 */
1725void
1726ahc_done(struct ahc_softc *ahc, struct scb *scb)
1727{
013791ee 1728 struct scsi_cmnd *cmd;
1da177e4
LT		 1729 struct ahc_linux_device *dev;
1730
1731 LIST_REMOVE(scb, pending_links);
1732 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1733 struct scb_tailq *untagged_q;
1734 int target_offset;
1735
1736 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1737 untagged_q = &(ahc->untagged_queues[target_offset]);
1738 TAILQ_REMOVE(untagged_q, scb, links.tqe);
e4e360c3 1739 BUG_ON(!TAILQ_EMPTY(untagged_q));
1da177e4
LT		 1740 }
1741
1742 if ((scb->flags & SCB_ACTIVE) == 0) {
1743 printf("SCB %d done'd twice\n", scb->hscb->tag);
1744 ahc_dump_card_state(ahc);
1745 panic("Stopping for safety");
1746 }
1747 cmd = scb->io_ctx;
1748 dev = scb->platform_data->dev;
1749 dev->active--;
1750 dev->openings++;
1751 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1752 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1753 dev->qfrozen--;
1754 }
1755 ahc_linux_unmap_scb(ahc, scb);
1756
1757 /*
1758 * Guard against stale sense data.
1759 * The Linux mid-layer assumes that sense
1760 * was retrieved anytime the first byte of
1761 * the sense buffer looks "sane".
1762 */
1763 cmd->sense_buffer[0] = 0;
1764 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1765 uint32_t amount_xferred;
1766
1767 amount_xferred =
1768 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1769 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1770#ifdef AHC_DEBUG
1771 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1772 ahc_print_path(ahc, scb);
1773 printf("Set CAM_UNCOR_PARITY\n");
1774 }
1775#endif
1776 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1777#ifdef AHC_REPORT_UNDERFLOWS
1778 /*
1779 * This code is disabled by default as some
1780 * clients of the SCSI system do not properly
1781 * initialize the underflow parameter. This
1782 * results in spurious termination of commands
1783 * that complete as expected (e.g. underflow is
1784 * allowed as command can return variable amounts
1785 * of data.
1786 */
1787 } else if (amount_xferred < scb->io_ctx->underflow) {
1788 u_int i;
1789
1790 ahc_print_path(ahc, scb);
1791 printf("CDB:");
1792 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1793 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1794 printf("\n");
1795 ahc_print_path(ahc, scb);
1796 printf("Saw underflow (%ld of %ld bytes). "
1797 "Treated as error\n",
1798 ahc_get_residual(scb),
1799 ahc_get_transfer_length(scb));
1800 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1801#endif
1802 } else {
1803 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1804 }
1805 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
b1abb4d6 1806 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1da177e4 1807 }
1da177e4
LT		 1808
1809 if (dev->openings == 1
1810 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1811 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1812 dev->tag_success_count++;
1813 /*
1814 * Some devices deal with temporary internal resource
1815 * shortages by returning queue full. When the queue
1816 * full occurrs, we throttle back. Slowly try to get
1817 * back to our previous queue depth.
1818 */
1819 if ((dev->openings + dev->active) < dev->maxtags
1820 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1821 dev->tag_success_count = 0;
1822 dev->openings++;
1823 }
1824
1825 if (dev->active == 0)
1826 dev->commands_since_idle_or_otag = 0;
1827
1da177e4
LT		 1828 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1829 printf("Recovery SCB completes\n");
1830 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1831 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1832 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1833 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
1834 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
1835 up(&ahc->platform_data->eh_sem);
1836 }
1837 }
1838
1839 ahc_free_scb(ahc, scb);
1840 ahc_linux_queue_cmd_complete(ahc, cmd);
1da177e4
LT		 1841}
1842
1843static void
1844ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
b1abb4d6 1845 struct scsi_device *sdev, struct scb *scb)
1da177e4
LT		 1846{
1847 struct ahc_devinfo devinfo;
b1abb4d6 1848 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1da177e4
LT		 1849
1850 ahc_compile_devinfo(&devinfo,
1851 ahc->our_id,
b1abb4d6
JB		 1852 sdev->sdev_target->id, sdev->lun,
1853 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1da177e4
LT		 1854 ROLE_INITIATOR);
1855
1856 /*
1857 * We don't currently trust the mid-layer to
1858 * properly deal with queue full or busy. So,
1859 * when one occurs, we tell the mid-layer to
1860 * unconditionally requeue the command to us
1861 * so that we can retry it ourselves. We also
1862 * implement our own throttling mechanism so
1863 * we don't clobber the device with too many
1864 * commands.
1865 */
1866 switch (ahc_get_scsi_status(scb)) {
1867 default:
1868 break;
1869 case SCSI_STATUS_CHECK_COND:
1870 case SCSI_STATUS_CMD_TERMINATED:
1871 {
013791ee 1872 struct scsi_cmnd *cmd;
1da177e4
LT		 1873
1874 /*
1875 * Copy sense information to the OS's cmd
1876 * structure if it is available.
1877 */
1878 cmd = scb->io_ctx;
1879 if (scb->flags & SCB_SENSE) {
1880 u_int sense_size;
1881
1882 sense_size = MIN(sizeof(struct scsi_sense_data)
1883 - ahc_get_sense_residual(scb),
1884 sizeof(cmd->sense_buffer));
1885 memcpy(cmd->sense_buffer,
1886 ahc_get_sense_buf(ahc, scb), sense_size);
1887 if (sense_size < sizeof(cmd->sense_buffer))
1888 memset(&cmd->sense_buffer[sense_size], 0,
1889 sizeof(cmd->sense_buffer) - sense_size);
1890 cmd->result |= (DRIVER_SENSE << 24);
1891#ifdef AHC_DEBUG
1892 if (ahc_debug & AHC_SHOW_SENSE) {
1893 int i;
1894
1895 printf("Copied %d bytes of sense data:",
1896 sense_size);
1897 for (i = 0; i < sense_size; i++) {
1898 if ((i & 0xF) == 0)
1899 printf("\n");
1900 printf("0x%x ", cmd->sense_buffer[i]);
1901 }
1902 printf("\n");
1903 }
1904#endif
1905 }
1906 break;
1907 }
1908 case SCSI_STATUS_QUEUE_FULL:
1909 {
1910 /*
1911 * By the time the core driver has returned this
1912 * command, all other commands that were queued
1913 * to us but not the device have been returned.
1914 * This ensures that dev->active is equal to
1915 * the number of commands actually queued to
1916 * the device.
1917 */
1918 dev->tag_success_count = 0;
1919 if (dev->active != 0) {
1920 /*
1921 * Drop our opening count to the number
1922 * of commands currently outstanding.
1923 */
1924 dev->openings = 0;
1925/*
1926 ahc_print_path(ahc, scb);
1927 printf("Dropping tag count to %d\n", dev->active);
1928 */
1929 if (dev->active == dev->tags_on_last_queuefull) {
1930
1931 dev->last_queuefull_same_count++;
1932 /*
1933 * If we repeatedly see a queue full
1934 * at the same queue depth, this
1935 * device has a fixed number of tag
1936 * slots. Lock in this tag depth
1937 * so we stop seeing queue fulls from
1938 * this device.
1939 */
1940 if (dev->last_queuefull_same_count
1941 == AHC_LOCK_TAGS_COUNT) {
1942 dev->maxtags = dev->active;
1943 ahc_print_path(ahc, scb);
1944 printf("Locking max tag count at %d\n",
1945 dev->active);
1946 }
1947 } else {
1948 dev->tags_on_last_queuefull = dev->active;
1949 dev->last_queuefull_same_count = 0;
1950 }
1951 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1952 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
1953 ahc_platform_set_tags(ahc, &devinfo,
1954 (dev->flags & AHC_DEV_Q_BASIC)
1955 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1956 break;
1957 }
1958 /*
1959 * Drop down to a single opening, and treat this
1960 * as if the target returned BUSY SCSI status.
1961 */
1962 dev->openings = 1;
1963 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
1964 ahc_platform_set_tags(ahc, &devinfo,
1965 (dev->flags & AHC_DEV_Q_BASIC)
1966 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1da177e4
LT		 1967 break;
1968 }
1969 }
1970}
1971
1972static void
013791ee 1973ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1da177e4 1974{
1da177e4
LT		 1975 /*
1976 * Map CAM error codes into Linux Error codes. We
1977 * avoid the conversion so that the DV code has the
1978 * full error information available when making
1979 * state change decisions.
1980 */
cb624029 1981 {
1da177e4
LT		 1982 u_int new_status;
1983
1984 switch (ahc_cmd_get_transaction_status(cmd)) {
1985 case CAM_REQ_INPROG:
1986 case CAM_REQ_CMP:
1987 case CAM_SCSI_STATUS_ERROR:
1988 new_status = DID_OK;
1989 break;
1990 case CAM_REQ_ABORTED:
1991 new_status = DID_ABORT;
1992 break;
1993 case CAM_BUSY:
1994 new_status = DID_BUS_BUSY;
1995 break;
1996 case CAM_REQ_INVALID:
1997 case CAM_PATH_INVALID:
1998 new_status = DID_BAD_TARGET;
1999 break;
2000 case CAM_SEL_TIMEOUT:
2001 new_status = DID_NO_CONNECT;
2002 break;
2003 case CAM_SCSI_BUS_RESET:
2004 case CAM_BDR_SENT:
2005 new_status = DID_RESET;
2006 break;
2007 case CAM_UNCOR_PARITY:
2008 new_status = DID_PARITY;
2009 break;
2010 case CAM_CMD_TIMEOUT:
2011 new_status = DID_TIME_OUT;
2012 break;
2013 case CAM_UA_ABORT:
2014 case CAM_REQ_CMP_ERR:
2015 case CAM_AUTOSENSE_FAIL:
2016 case CAM_NO_HBA:
2017 case CAM_DATA_RUN_ERR:
2018 case CAM_UNEXP_BUSFREE:
2019 case CAM_SEQUENCE_FAIL:
2020 case CAM_CCB_LEN_ERR:
2021 case CAM_PROVIDE_FAIL:
2022 case CAM_REQ_TERMIO:
2023 case CAM_UNREC_HBA_ERROR:
2024 case CAM_REQ_TOO_BIG:
2025 new_status = DID_ERROR;
2026 break;
2027 case CAM_REQUEUE_REQ:
8e45ebcc 2028 new_status = DID_REQUEUE;
1da177e4
LT		 2029 break;
2030 default:
2031 /* We should never get here */
2032 new_status = DID_ERROR;
2033 break;
2034 }
2035
2036 ahc_cmd_set_transaction_status(cmd, new_status);
2037 }
2038
8e45ebcc 2039 cmd->scsi_done(cmd);
1da177e4
LT		 2040}
2041
1da177e4
LT		 2042static void
2043ahc_linux_sem_timeout(u_long arg)
2044{
2045 struct ahc_softc *ahc;
2046 u_long s;
2047
2048 ahc = (struct ahc_softc *)arg;
2049
2050 ahc_lock(ahc, &s);
2051 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2052 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2053 up(&ahc->platform_data->eh_sem);
2054 }
2055 ahc_unlock(ahc, &s);
2056}
2057
2058static void
2059ahc_linux_freeze_simq(struct ahc_softc *ahc)
2060{
2061 ahc->platform_data->qfrozen++;
2062 if (ahc->platform_data->qfrozen == 1) {
2063 scsi_block_requests(ahc->platform_data->host);
2064
2065 /* XXX What about Twin channels? */
2066 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2067 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2068 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2069 }
2070}
2071
2072static void
2073ahc_linux_release_simq(u_long arg)
2074{
2075 struct ahc_softc *ahc;
2076 u_long s;
2077 int unblock_reqs;
2078
2079 ahc = (struct ahc_softc *)arg;
2080
2081 unblock_reqs = 0;
2082 ahc_lock(ahc, &s);
2083 if (ahc->platform_data->qfrozen > 0)
2084 ahc->platform_data->qfrozen--;
2085 if (ahc->platform_data->qfrozen == 0)
2086 unblock_reqs = 1;
1da177e4
LT		 2087 ahc_unlock(ahc, &s);
2088 /*
2089 * There is still a race here. The mid-layer
2090 * should keep its own freeze count and use
2091 * a bottom half handler to run the queues
2092 * so we can unblock with our own lock held.
2093 */
2094 if (unblock_reqs)
2095 scsi_unblock_requests(ahc->platform_data->host);
2096}
2097
1da177e4 2098static int
013791ee 2099ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
1da177e4
LT		 2100{
2101 struct ahc_softc *ahc;
1da177e4
LT		 2102 struct ahc_linux_device *dev;
2103 struct scb *pending_scb;
1da177e4
LT		 2104 u_int saved_scbptr;
2105 u_int active_scb_index;
2106 u_int last_phase;
2107 u_int saved_scsiid;
2108 u_int cdb_byte;
2109 int retval;
2110 int was_paused;
2111 int paused;
2112 int wait;
2113 int disconnected;
2114
2115 pending_scb = NULL;
2116 paused = FALSE;
2117 wait = FALSE;
2118 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
1da177e4 2119
017560fc 2120 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
1da177e4
LT		 2121 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2122
2123 printf("CDB:");
2124 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2125 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2126 printf("\n");
2127
8fa728a2
JG		 2128 spin_lock_irq(&ahc->platform_data->spin_lock);
2129
1da177e4
LT		 2130 /*
2131 * First determine if we currently own this command.
2132 * Start by searching the device queue. If not found
2133 * there, check the pending_scb list. If not found
2134 * at all, and the system wanted us to just abort the
2135 * command, return success.
2136 */
b1abb4d6 2137 dev = scsi_transport_device_data(cmd->device);
1da177e4
LT		 2138
2139 if (dev == NULL) {
2140 /*
2141 * No target device for this command exists,
2142 * so we must not still own the command.
2143 */
2144 printf("%s:%d:%d:%d: Is not an active device\n",
2145 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2146 cmd->device->lun);
2147 retval = SUCCESS;
2148 goto no_cmd;
2149 }
2150
1da177e4
LT		 2151 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2152 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2153 cmd->device->channel + 'A',
2154 cmd->device->lun,
2155 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2156 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2157 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2158 cmd->device->lun);
2159 retval = SUCCESS;
2160 goto done;
2161 }
2162
2163 /*
2164 * See if we can find a matching cmd in the pending list.
2165 */
2166 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2167 if (pending_scb->io_ctx == cmd)
2168 break;
2169 }
2170
2171 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2172
2173 /* Any SCB for this device will do for a target reset */
2174 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
422c0d61
JG		 2175 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2176 scmd_channel(cmd) + 'A',
1da177e4
LT		 2177 CAM_LUN_WILDCARD,
2178 SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2179 break;
2180 }
2181 }
2182
2183 if (pending_scb == NULL) {
017560fc 2184 scmd_printk(KERN_INFO, cmd, "Command not found\n");
1da177e4
LT		 2185 goto no_cmd;
2186 }
2187
2188 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2189 /*
2190 * We can't queue two recovery actions using the same SCB
2191 */
2192 retval = FAILED;
2193 goto done;
2194 }
2195
2196 /*
2197 * Ensure that the card doesn't do anything
2198 * behind our back and that we didn't "just" miss
2199 * an interrupt that would affect this cmd.
2200 */
2201 was_paused = ahc_is_paused(ahc);
2202 ahc_pause_and_flushwork(ahc);
2203 paused = TRUE;
2204
2205 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
017560fc 2206 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
1da177e4
LT		 2207 goto no_cmd;
2208 }
2209
2210 printf("%s: At time of recovery, card was %spaused\n",
2211 ahc_name(ahc), was_paused ? "" : "not ");
2212 ahc_dump_card_state(ahc);
2213
2214 disconnected = TRUE;
2215 if (flag == SCB_ABORT) {
2216 if (ahc_search_qinfifo(ahc, cmd->device->id,
2217 cmd->device->channel + 'A',
2218 cmd->device->lun,
2219 pending_scb->hscb->tag,
2220 ROLE_INITIATOR, CAM_REQ_ABORTED,
2221 SEARCH_COMPLETE) > 0) {
2222 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2223 ahc_name(ahc), cmd->device->channel,
2224 cmd->device->id, cmd->device->lun);
2225 retval = SUCCESS;
2226 goto done;
2227 }
2228 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2229 cmd->device->channel + 'A',
2230 cmd->device->lun, pending_scb->hscb->tag,
2231 ROLE_INITIATOR, /*status*/0,
2232 SEARCH_COUNT) > 0) {
2233 disconnected = FALSE;
2234 }
2235
2236 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2237 struct scb *bus_scb;
2238
2239 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2240 if (bus_scb == pending_scb)
2241 disconnected = FALSE;
2242 else if (flag != SCB_ABORT
2243 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2244 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2245 disconnected = FALSE;
2246 }
2247
2248 /*
2249 * At this point, pending_scb is the scb associated with the
2250 * passed in command. That command is currently active on the
2251 * bus, is in the disconnected state, or we're hoping to find
2252 * a command for the same target active on the bus to abuse to
2253 * send a BDR. Queue the appropriate message based on which of
2254 * these states we are in.
2255 */
2256 last_phase = ahc_inb(ahc, LASTPHASE);
2257 saved_scbptr = ahc_inb(ahc, SCBPTR);
2258 active_scb_index = ahc_inb(ahc, SCB_TAG);
2259 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2260 if (last_phase != P_BUSFREE
2261 && (pending_scb->hscb->tag == active_scb_index
2262 || (flag == SCB_DEVICE_RESET
422c0d61 2263 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
1da177e4
LT		 2264
2265 /*
2266 * We're active on the bus, so assert ATN
2267 * and hope that the target responds.
2268 */
2269 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2270 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2271 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2272 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
017560fc 2273 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
1da177e4
LT		 2274 wait = TRUE;
2275 } else if (disconnected) {
2276
2277 /*
2278 * Actually re-queue this SCB in an attempt
2279 * to select the device before it reconnects.
2280 * In either case (selection or reselection),
2281 * we will now issue the approprate message
2282 * to the timed-out device.
2283 *
2284 * Set the MK_MESSAGE control bit indicating
2285 * that we desire to send a message. We
2286 * also set the disconnected flag since
2287 * in the paging case there is no guarantee
2288 * that our SCB control byte matches the
2289 * version on the card. We don't want the
2290 * sequencer to abort the command thinking
2291 * an unsolicited reselection occurred.
2292 */
2293 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2294 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2295
2296 /*
2297 * Remove any cached copy of this SCB in the
2298 * disconnected list in preparation for the
2299 * queuing of our abort SCB. We use the
2300 * same element in the SCB, SCB_NEXT, for
2301 * both the qinfifo and the disconnected list.
2302 */
2303 ahc_search_disc_list(ahc, cmd->device->id,
2304 cmd->device->channel + 'A',
2305 cmd->device->lun, pending_scb->hscb->tag,
2306 /*stop_on_first*/TRUE,
2307 /*remove*/TRUE,
2308 /*save_state*/FALSE);
2309
2310 /*
2311 * In the non-paging case, the sequencer will
2312 * never re-reference the in-core SCB.
2313 * To make sure we are notified during
2314 * reslection, set the MK_MESSAGE flag in
2315 * the card's copy of the SCB.
2316 */
2317 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2318 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2319 ahc_outb(ahc, SCB_CONTROL,
2320 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2321 }
2322
2323 /*
2324 * Clear out any entries in the QINFIFO first
2325 * so we are the next SCB for this target
2326 * to run.
2327 */
2328 ahc_search_qinfifo(ahc, cmd->device->id,
2329 cmd->device->channel + 'A',
2330 cmd->device->lun, SCB_LIST_NULL,
2331 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2332 SEARCH_COMPLETE);
2333 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2334 ahc_outb(ahc, SCBPTR, saved_scbptr);
2335 ahc_print_path(ahc, pending_scb);
2336 printf("Device is disconnected, re-queuing SCB\n");
2337 wait = TRUE;
2338 } else {
017560fc 2339 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
1da177e4
LT		 2340 retval = FAILED;
2341 goto done;
2342 }
2343
2344no_cmd:
2345 /*
2346 * Our assumption is that if we don't have the command, no
2347 * recovery action was required, so we return success. Again,
2348 * the semantics of the mid-layer recovery engine are not
2349 * well defined, so this may change in time.
2350 */
2351 retval = SUCCESS;
2352done:
2353 if (paused)
2354 ahc_unpause(ahc);
2355 if (wait) {
2356 struct timer_list timer;
2357 int ret;
2358
2359 ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
2360 spin_unlock_irq(&ahc->platform_data->spin_lock);
2361 init_timer(&timer);
2362 timer.data = (u_long)ahc;
2363 timer.expires = jiffies + (5 * HZ);
2364 timer.function = ahc_linux_sem_timeout;
2365 add_timer(&timer);
2366 printf("Recovery code sleeping\n");
2367 down(&ahc->platform_data->eh_sem);
2368 printf("Recovery code awake\n");
2369 ret = del_timer_sync(&timer);
2370 if (ret == 0) {
2371 printf("Timer Expired\n");
2372 retval = FAILED;
2373 }
2374 spin_lock_irq(&ahc->platform_data->spin_lock);
2375 }
8fa728a2
JG		 2376
2377 spin_unlock_irq(&ahc->platform_data->spin_lock);
1da177e4
LT		 2378 return (retval);
2379}
2380
2381void
2382ahc_platform_dump_card_state(struct ahc_softc *ahc)
2383{
1da177e4
LT		 2384}
2385
fad01ef8
JB		 2386static void ahc_linux_set_width(struct scsi_target *starget, int width)
2387{
2388 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2389 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2390 struct ahc_devinfo devinfo;
2391 unsigned long flags;
2392
2393 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2394 starget->channel + 'A', ROLE_INITIATOR);
2395 ahc_lock(ahc, &flags);
2396 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2397 ahc_unlock(ahc, &flags);
2398}
2399
92d161c3 2400static void ahc_linux_set_period(struct scsi_target *starget, int period)
2401{
2402 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2403 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2404 struct ahc_tmode_tstate *tstate;
2405 struct ahc_initiator_tinfo *tinfo
2406 = ahc_fetch_transinfo(ahc,
2407 starget->channel + 'A',
2408 shost->this_id, starget->id, &tstate);
2409 struct ahc_devinfo devinfo;
597487b9 2410 unsigned int ppr_options = tinfo->goal.ppr_options;
92d161c3 2411 unsigned long flags;
597487b9 2412 unsigned long offset = tinfo->goal.offset;
92d161c3 2413 struct ahc_syncrate *syncrate;
2414
2415 if (offset == 0)
2416 offset = MAX_OFFSET;
2417
2bf2c568
JB		 2418 if (period < 9)
2419 period = 9; /* 12.5ns is our minimum */
2420 if (period == 9)
2421 ppr_options |= MSG_EXT_PPR_DT_REQ;
2422
92d161c3 2423 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2424 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8
JB		 2425
2426 /* all PPR requests apart from QAS require wide transfers */
2427 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
fad01ef8
JB		 2428 if (spi_width(starget) == 0)
2429 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2430 }
2431
92d161c3 2432 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2433 ahc_lock(ahc, &flags);
2434 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2435 ppr_options, AHC_TRANS_GOAL, FALSE);
2436 ahc_unlock(ahc, &flags);
2437}
2438
92d161c3 2439static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2440{
2441 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2442 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2443 struct ahc_tmode_tstate *tstate;
2444 struct ahc_initiator_tinfo *tinfo
2445 = ahc_fetch_transinfo(ahc,
2446 starget->channel + 'A',
2447 shost->this_id, starget->id, &tstate);
2448 struct ahc_devinfo devinfo;
2449 unsigned int ppr_options = 0;
2450 unsigned int period = 0;
2451 unsigned long flags;
2452 struct ahc_syncrate *syncrate = NULL;
2453
2454 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2455 starget->channel + 'A', ROLE_INITIATOR);
2456 if (offset != 0) {
2457 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
597487b9
JB		 2458 period = tinfo->goal.period;
2459 ppr_options = tinfo->goal.ppr_options;
92d161c3 2460 }
2461 ahc_lock(ahc, &flags);
2462 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2463 ppr_options, AHC_TRANS_GOAL, FALSE);
2464 ahc_unlock(ahc, &flags);
2465}
2466
92d161c3 2467static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2468{
2469 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2470 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2471 struct ahc_tmode_tstate *tstate;
2472 struct ahc_initiator_tinfo *tinfo
2473 = ahc_fetch_transinfo(ahc,
2474 starget->channel + 'A',
2475 shost->this_id, starget->id, &tstate);
2476 struct ahc_devinfo devinfo;
597487b9 2477 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2478 & ~MSG_EXT_PPR_DT_REQ;
597487b9 2479 unsigned int period = tinfo->goal.period;
84e66ee7 2480 unsigned int width = tinfo->goal.width;
92d161c3 2481 unsigned long flags;
2482 struct ahc_syncrate *syncrate;
2483
2bf2c568 2484 if (dt) {
2bf2c568 2485 ppr_options |= MSG_EXT_PPR_DT_REQ;
84e66ee7
JB		 2486 if (!width)
2487 ahc_linux_set_width(starget, 1);
2488 } else if (period == 9)
2bf2c568
JB		 2489 period = 10; /* if resetting DT, period must be >= 25ns */
2490
92d161c3 2491 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2492 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2493 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
92d161c3 2494 ahc_lock(ahc, &flags);
597487b9 2495 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3 2496 ppr_options, AHC_TRANS_GOAL, FALSE);
2497 ahc_unlock(ahc, &flags);
2498}
2499
ace4e718
JB		 2500#if 0
2501/* FIXME: This code claims to support IU and QAS. However, the actual
2502 * sequencer code and aic7xxx_core have no support for these parameters and
2503 * will get into a bad state if they're negotiated. Do not enable this
2504 * unless you know what you're doing */
92d161c3 2505static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2506{
2507 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2508 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2509 struct ahc_tmode_tstate *tstate;
2510 struct ahc_initiator_tinfo *tinfo
2511 = ahc_fetch_transinfo(ahc,
2512 starget->channel + 'A',
2513 shost->this_id, starget->id, &tstate);
2514 struct ahc_devinfo devinfo;
597487b9 2515 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2516 & ~MSG_EXT_PPR_QAS_REQ;
597487b9 2517 unsigned int period = tinfo->goal.period;
92d161c3 2518 unsigned long flags;
2519 struct ahc_syncrate *syncrate;
2520
2521 if (qas)
2522 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2523
2524 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2525 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2526 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2527 ahc_lock(ahc, &flags);
597487b9 2528 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3 2529 ppr_options, AHC_TRANS_GOAL, FALSE);
2530 ahc_unlock(ahc, &flags);
2531}
2532
92d161c3 2533static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2534{
2535 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2536 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2537 struct ahc_tmode_tstate *tstate;
2538 struct ahc_initiator_tinfo *tinfo
2539 = ahc_fetch_transinfo(ahc,
2540 starget->channel + 'A',
2541 shost->this_id, starget->id, &tstate);
2542 struct ahc_devinfo devinfo;
597487b9 2543 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2544 & ~MSG_EXT_PPR_IU_REQ;
597487b9 2545 unsigned int period = tinfo->goal.period;
92d161c3 2546 unsigned long flags;
2547 struct ahc_syncrate *syncrate;
2548
2549 if (iu)
2550 ppr_options |= MSG_EXT_PPR_IU_REQ;
2551
2552 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2553 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2554 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2555 ahc_lock(ahc, &flags);
597487b9 2556 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3 2557 ppr_options, AHC_TRANS_GOAL, FALSE);
2558 ahc_unlock(ahc, &flags);
2559}
ace4e718 2560#endif
92d161c3 2561
2562static struct spi_function_template ahc_linux_transport_functions = {
92d161c3 2563 .set_offset = ahc_linux_set_offset,
2564 .show_offset = 1,
92d161c3 2565 .set_period = ahc_linux_set_period,
2566 .show_period = 1,
92d161c3 2567 .set_width = ahc_linux_set_width,
2568 .show_width = 1,
92d161c3 2569 .set_dt = ahc_linux_set_dt,
2570 .show_dt = 1,
ace4e718 2571#if 0
92d161c3 2572 .set_iu = ahc_linux_set_iu,
2573 .show_iu = 1,
92d161c3 2574 .set_qas = ahc_linux_set_qas,
2575 .show_qas = 1,
ace4e718 2576#endif
92d161c3 2577};
2578
2579
2580
1da177e4
LT		 2581static int __init
2582ahc_linux_init(void)
2583{
dfd287f6
CH		 2584 /*
2585 * If we've been passed any parameters, process them now.
2586 */
2587 if (aic7xxx)
2588 aic7xxx_setup(aic7xxx);
2589
2590 ahc_linux_transport_template =
2591 spi_attach_transport(&ahc_linux_transport_functions);
92d161c3 2592 if (!ahc_linux_transport_template)
2593 return -ENODEV;
dfd287f6 2594
b1abb4d6
JB		 2595 scsi_transport_reserve_target(ahc_linux_transport_template,
2596 sizeof(struct ahc_linux_target));
2597 scsi_transport_reserve_device(ahc_linux_transport_template,
2598 sizeof(struct ahc_linux_device));
dfd287f6 2599
dfd287f6
CH		 2600 ahc_linux_pci_init();
2601 ahc_linux_eisa_init();
2602 return 0;
1da177e4
LT		 2603}
2604
2605static void
2606ahc_linux_exit(void)
2607{
1da177e4
LT		 2608 ahc_linux_pci_exit();
2609 ahc_linux_eisa_exit();
92d161c3 2610 spi_release_transport(ahc_linux_transport_template);
1da177e4
LT		 2611}
2612
2613module_init(ahc_linux_init);
2614module_exit(ahc_linux_exit);
Linux kernel - Deliverables
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