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Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[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 */
5a0e3ad6 132#include <linux/slab.h>
1da177e4 133
1da177e4 134
1da177e4
LT		 135/*
136 * Set this to the delay in seconds after SCSI bus reset.
137 * Note, we honor this only for the initial bus reset.
138 * The scsi error recovery code performs its own bus settle
139 * delay handling for error recovery actions.
140 */
141#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
142#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
143#else
144#define AIC7XXX_RESET_DELAY 5000
145#endif
146
147/*
148 * Control collection of SCSI transfer statistics for the /proc filesystem.
149 *
150 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
151 * NOTE: This does affect performance since it has to maintain statistics.
152 */
153#ifdef CONFIG_AIC7XXX_PROC_STATS
154#define AIC7XXX_PROC_STATS
155#endif
156
157/*
158 * To change the default number of tagged transactions allowed per-device,
159 * add a line to the lilo.conf file like:
160 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
161 * which will result in the first four devices on the first two
162 * controllers being set to a tagged queue depth of 32.
163 *
164 * The tag_commands is an array of 16 to allow for wide and twin adapters.
165 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
166 * for channel 1.
167 */
168typedef struct {
169 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
170} adapter_tag_info_t;
171
172/*
173 * Modify this as you see fit for your system.
174 *
175 * 0 tagged queuing disabled
176 * 1 <= n <= 253 n == max tags ever dispatched.
177 *
178 * The driver will throttle the number of commands dispatched to a
179 * device if it returns queue full. For devices with a fixed maximum
180 * queue depth, the driver will eventually determine this depth and
181 * lock it in (a console message is printed to indicate that a lock
182 * has occurred). On some devices, queue full is returned for a temporary
183 * resource shortage. These devices will return queue full at varying
184 * depths. The driver will throttle back when the queue fulls occur and
185 * attempt to slowly increase the depth over time as the device recovers
186 * from the resource shortage.
187 *
188 * In this example, the first line will disable tagged queueing for all
189 * the devices on the first probed aic7xxx adapter.
190 *
191 * The second line enables tagged queueing with 4 commands/LUN for IDs
192 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
193 * driver to attempt to use up to 64 tags for ID 1.
194 *
195 * The third line is the same as the first line.
196 *
197 * The fourth line disables tagged queueing for devices 0 and 3. It
198 * enables tagged queueing for the other IDs, with 16 commands/LUN
199 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
200 * IDs 2, 5-7, and 9-15.
201 */
202
203/*
204 * NOTE: The below structure is for reference only, the actual structure
205 * to modify in order to change things is just below this comment block.
206adapter_tag_info_t aic7xxx_tag_info[] =
207{
208 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
209 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
210 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
211 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
212};
213*/
214
215#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
216#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
217#else
218#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
219#endif
220
221#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
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 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
230}
231
232/*
233 * By default, use the number of commands specified by
234 * the users kernel configuration.
235 */
236static adapter_tag_info_t aic7xxx_tag_info[] =
237{
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 {AIC7XXX_CONFIGED_TAG_COMMANDS}
254};
255
1da177e4
LT		 256/*
257 * There should be a specific return value for this in scsi.h, but
258 * it seems that most drivers ignore it.
259 */
260#define DID_UNDERFLOW DID_ERROR
261
262void
263ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
264{
265 printk("(scsi%d:%c:%d:%d): ",
266 ahc->platform_data->host->host_no,
267 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
268 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
269 scb != NULL ? SCB_GET_LUN(scb) : -1);
270}
271
272/*
273 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
274 * cards in the system. This should be fixed. Exceptions to this
275 * rule are noted in the comments.
276 */
277
278/*
279 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
280 * has no effect on any later resets that might occur due to things like
281 * SCSI bus timeouts.
282 */
283static uint32_t aic7xxx_no_reset;
284
1da177e4
LT		 285/*
286 * Should we force EXTENDED translation on a controller.
287 * 0 == Use whatever is in the SEEPROM or default to off
288 * 1 == Use whatever is in the SEEPROM or default to on
289 */
290static uint32_t aic7xxx_extended;
291
292/*
293 * PCI bus parity checking of the Adaptec controllers. This is somewhat
294 * dubious at best. To my knowledge, this option has never actually
295 * solved a PCI parity problem, but on certain machines with broken PCI
296 * chipset configurations where stray PCI transactions with bad parity are
25985edc 297 * the norm rather than the exception, the error messages can be overwhelming.
1da177e4
LT		 298 * It's included in the driver for completeness.
299 * 0 = Shut off PCI parity check
300 * non-0 = reverse polarity pci parity checking
301 */
302static uint32_t aic7xxx_pci_parity = ~0;
303
1da177e4
LT		 304/*
305 * There are lots of broken chipsets in the world. Some of them will
306 * violate the PCI spec when we issue byte sized memory writes to our
307 * controller. I/O mapped register access, if allowed by the given
308 * platform, will work in almost all cases.
309 */
310uint32_t aic7xxx_allow_memio = ~0;
311
1da177e4
LT		 312/*
313 * So that we can set how long each device is given as a selection timeout.
314 * The table of values goes like this:
315 * 0 - 256ms
316 * 1 - 128ms
317 * 2 - 64ms
318 * 3 - 32ms
319 * We default to 256ms because some older devices need a longer time
320 * to respond to initial selection.
321 */
322static uint32_t aic7xxx_seltime;
323
324/*
325 * Certain devices do not perform any aging on commands. Should the
326 * device be saturated by commands in one portion of the disk, it is
327 * possible for transactions on far away sectors to never be serviced.
328 * To handle these devices, we can periodically send an ordered tag to
329 * force all outstanding transactions to be serviced prior to a new
330 * transaction.
331 */
289fe5b1 332static uint32_t aic7xxx_periodic_otag;
1da177e4
LT		 333
334/*
335 * Module information and settable options.
336 */
337static char *aic7xxx = NULL;
338
64624d4f
HR		 339MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
340MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");
1da177e4
LT		 341MODULE_LICENSE("Dual BSD/GPL");
342MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
343module_param(aic7xxx, charp, 0444);
344MODULE_PARM_DESC(aic7xxx,
2b6ee9b5 345"period-delimited options string:\n"
1da177e4
LT		 346" verbose Enable verbose/diagnostic logging\n"
347" allow_memio Allow device registers to be memory mapped\n"
348" debug Bitmask of debug values to enable\n"
349" no_probe Toggle EISA/VLB controller probing\n"
350" probe_eisa_vl Toggle EISA/VLB controller probing\n"
b1c11812 351" no_reset Suppress initial bus resets\n"
1da177e4
LT		 352" extended Enable extended geometry on all controllers\n"
353" periodic_otag Send an ordered tagged transaction\n"
354" periodically to prevent tag starvation.\n"
355" This may be required by some older disk\n"
356" drives or RAID arrays.\n"
1da177e4
LT		 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"
970e2486
LDM		 363" Sample modprobe configuration file:\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"
1da177e4
LT		 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 376static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
dacee84b 377static void ahc_linux_release_simq(struct ahc_softc *ahc);
013791ee 378static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
1da177e4 379static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
1da177e4
LT		 380static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
381 struct ahc_devinfo *devinfo);
b1abb4d6 382static void ahc_linux_device_queue_depth(struct scsi_device *);
e4e360c3
JB		 383static int ahc_linux_run_command(struct ahc_softc*,
384 struct ahc_linux_device *,
385 struct scsi_cmnd *);
1da177e4 386static void ahc_linux_setup_tag_info_global(char *p);
1da177e4 387static int aic7xxx_setup(char *s);
2a40342e
CH		 388
389static int ahc_linux_unit;
390
1da177e4 391
be0d6768
DV		 392/************************** OS Utility Wrappers *******************************/
393void
394ahc_delay(long usec)
395{
396 /*
397 * udelay on Linux can have problems for
398 * multi-millisecond waits. Wait at most
399 * 1024us per call.
400 */
401 while (usec > 0) {
402 udelay(usec % 1024);
403 usec -= 1024;
404 }
405}
406
407/***************************** Low Level I/O **********************************/
408uint8_t
409ahc_inb(struct ahc_softc * ahc, long port)
410{
411 uint8_t x;
412
413 if (ahc->tag == BUS_SPACE_MEMIO) {
414 x = readb(ahc->bsh.maddr + port);
415 } else {
416 x = inb(ahc->bsh.ioport + port);
417 }
418 mb();
419 return (x);
420}
421
422void
423ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
424{
425 if (ahc->tag == BUS_SPACE_MEMIO) {
426 writeb(val, ahc->bsh.maddr + port);
427 } else {
428 outb(val, ahc->bsh.ioport + port);
429 }
430 mb();
431}
432
433void
434ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
435{
436 int i;
437
438 /*
439 * There is probably a more efficient way to do this on Linux
440 * but we don't use this for anything speed critical and this
441 * should work.
442 */
443 for (i = 0; i < count; i++)
444 ahc_outb(ahc, port, *array++);
445}
446
447void
448ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
449{
450 int i;
451
452 /*
453 * There is probably a more efficient way to do this on Linux
454 * but we don't use this for anything speed critical and this
455 * should work.
456 */
457 for (i = 0; i < count; i++)
458 *array++ = ahc_inb(ahc, port);
459}
460
1da177e4 461/********************************* Inlines ************************************/
be0d6768 462static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
1da177e4 463
be0d6768 464static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
1da177e4
LT		 465 struct ahc_dma_seg *sg,
466 dma_addr_t addr, bus_size_t len);
467
be0d6768 468static void
1da177e4
LT		 469ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
470{
013791ee 471 struct scsi_cmnd *cmd;
1da177e4
LT		 472
473 cmd = scb->io_ctx;
474 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
3a57c4a5
FT		 475
476 scsi_dma_unmap(cmd);
1da177e4
LT		 477}
478
be0d6768 479static int
1da177e4
LT		 480ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
481 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
482{
483 int consumed;
484
485 if ((scb->sg_count + 1) > AHC_NSEG)
486 panic("Too few segs for dma mapping. "
487 "Increase AHC_NSEG\n");
488
489 consumed = 1;
490 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
491 scb->platform_data->xfer_len += len;
492
493 if (sizeof(dma_addr_t) > 4
494 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
495 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
496
497 sg->len = ahc_htole32(len);
498 return (consumed);
499}
500
1da177e4
LT		 501/*
502 * Return a string describing the driver.
503 */
504static const char *
505ahc_linux_info(struct Scsi_Host *host)
506{
507 static char buffer[512];
508 char ahc_info[256];
509 char *bp;
510 struct ahc_softc *ahc;
511
512 bp = &buffer[0];
513 ahc = *(struct ahc_softc **)host->hostdata;
514 memset(bp, 0, sizeof(buffer));
980b306a
DV		 515 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n"
516 " <");
1da177e4 517 strcat(bp, ahc->description);
980b306a
DV		 518 strcat(bp, ">\n"
519 " ");
1da177e4
LT		 520 ahc_controller_info(ahc, ahc_info);
521 strcat(bp, ahc_info);
522 strcat(bp, "\n");
523
524 return (bp);
525}
526
527/*
528 * Queue an SCB to the controller.
529 */
530static int
f281233d 531ahc_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
1da177e4
LT		 532{
533 struct ahc_softc *ahc;
b1abb4d6 534 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
6d5e9fd1
CH		 535 int rtn = SCSI_MLQUEUE_HOST_BUSY;
536 unsigned long flags;
1da177e4
LT		 537
538 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
539
6d5e9fd1
CH		 540 ahc_lock(ahc, &flags);
541 if (ahc->platform_data->qfrozen == 0) {
542 cmd->scsi_done = scsi_done;
543 cmd->result = CAM_REQ_INPROG << 16;
544 rtn = ahc_linux_run_command(ahc, dev, cmd);
545 }
546 ahc_unlock(ahc, &flags);
e4e360c3 547
6d5e9fd1 548 return rtn;
1da177e4
LT		 549}
550
f281233d
JG		 551static DEF_SCSI_QCMD(ahc_linux_queue)
552
b1abb4d6
JB		 553static inline struct scsi_target **
554ahc_linux_target_in_softc(struct scsi_target *starget)
1da177e4 555{
b1abb4d6
JB		 556 struct ahc_softc *ahc =
557 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
fb3089df 558 unsigned int target_offset;
b1abb4d6
JB		 559
560 target_offset = starget->id;
561 if (starget->channel != 0)
562 target_offset += 8;
563
564 return &ahc->platform_data->starget[target_offset];
565}
566
567static int
568ahc_linux_target_alloc(struct scsi_target *starget)
569{
570 struct ahc_softc *ahc =
571 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
572 struct seeprom_config *sc = ahc->seep_config;
fb3089df 573 unsigned long flags;
b1abb4d6 574 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
b1abb4d6
JB		 575 unsigned short scsirate;
576 struct ahc_devinfo devinfo;
577 struct ahc_initiator_tinfo *tinfo;
578 struct ahc_tmode_tstate *tstate;
579 char channel = starget->channel + 'A';
580 unsigned int our_id = ahc->our_id;
581 unsigned int target_offset;
c7525233
JB		 582
583 target_offset = starget->id;
584 if (starget->channel != 0)
585 target_offset += 8;
b1abb4d6
JB		 586
587 if (starget->channel)
588 our_id = ahc->our_id_b;
1da177e4 589
fb3089df 590 ahc_lock(ahc, &flags);
fb3089df 591
b1abb4d6 592 BUG_ON(*ahc_targp != NULL);
c7525233 593
b1abb4d6 594 *ahc_targp = starget;
c7525233 595
b1abb4d6 596 if (sc) {
12021fff
JB		 597 int maxsync = AHC_SYNCRATE_DT;
598 int ultra = 0;
599 int flags = sc->device_flags[target_offset];
600
601 if (ahc->flags & AHC_NEWEEPROM_FMT) {
602 if (flags & CFSYNCHISULTRA)
603 ultra = 1;
604 } else if (flags & CFULTRAEN)
605 ultra = 1;
606 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
607 * change it to ultra=0, CFXFER = 0 */
608 if(ultra && (flags & CFXFER) == 0x04) {
609 ultra = 0;
610 flags &= ~CFXFER;
611 }
612
b1abb4d6 613 if ((ahc->features & AHC_ULTRA2) != 0) {
12021fff 614 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
b1abb4d6 615 } else {
12021fff
JB		 616 scsirate = (flags & CFXFER) << 4;
617 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
618 AHC_SYNCRATE_FAST;
c7525233 619 }
12021fff
JB		 620 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
621 if (!(flags & CFSYNCH))
622 spi_max_offset(starget) = 0;
b1abb4d6 623 spi_min_period(starget) =
12021fff
JB		 624 ahc_find_period(ahc, scsirate, maxsync);
625
b1abb4d6
JB		 626 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
627 starget->id, &tstate);
c7525233 628 }
b1abb4d6
JB		 629 ahc_compile_devinfo(&devinfo, our_id, starget->id,
630 CAM_LUN_WILDCARD, channel,
631 ROLE_INITIATOR);
632 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
633 AHC_TRANS_GOAL, /*paused*/FALSE);
634 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
635 AHC_TRANS_GOAL, /*paused*/FALSE);
fb3089df 636 ahc_unlock(ahc, &flags);
b1abb4d6
JB		 637
638 return 0;
639}
640
641static void
642ahc_linux_target_destroy(struct scsi_target *starget)
643{
644 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
645
646 *ahc_targp = NULL;
647}
648
649static int
650ahc_linux_slave_alloc(struct scsi_device *sdev)
651{
652 struct ahc_softc *ahc =
653 *((struct ahc_softc **)sdev->host->hostdata);
654 struct scsi_target *starget = sdev->sdev_target;
b1abb4d6
JB		 655 struct ahc_linux_device *dev;
656
657 if (bootverbose)
48813cf9 658 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
b1abb4d6 659
b1abb4d6
JB		 660 dev = scsi_transport_device_data(sdev);
661 memset(dev, 0, sizeof(*dev));
662
663 /*
664 * We start out life using untagged
665 * transactions of which we allow one.
666 */
667 dev->openings = 1;
668
669 /*
670 * Set maxtags to 0. This will be changed if we
671 * later determine that we are dealing with
672 * a tagged queuing capable device.
673 */
674 dev->maxtags = 0;
675
79778a27
JB		 676 spi_period(starget) = 0;
677
b1abb4d6 678 return 0;
1da177e4
LT		 679}
680
681static int
b1abb4d6 682ahc_linux_slave_configure(struct scsi_device *sdev)
1da177e4
LT		 683{
684 struct ahc_softc *ahc;
1da177e4 685
b1abb4d6 686 ahc = *((struct ahc_softc **)sdev->host->hostdata);
c7525233 687
1da177e4 688 if (bootverbose)
017560fc 689 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
c7525233 690
b1abb4d6 691 ahc_linux_device_queue_depth(sdev);
cb624029 692
693 /* Initial Domain Validation */
b1abb4d6
JB		 694 if (!spi_initial_dv(sdev->sdev_target))
695 spi_dv_device(sdev);
cb624029 696
c7525233 697 return 0;
1da177e4
LT		 698}
699
1da177e4
LT		 700#if defined(__i386__)
701/*
702 * Return the disk geometry for the given SCSI device.
703 */
704static int
1da177e4
LT		 705ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
706 sector_t capacity, int geom[])
707{
708 uint8_t *bh;
1da177e4
LT		 709 int heads;
710 int sectors;
711 int cylinders;
712 int ret;
713 int extended;
714 struct ahc_softc *ahc;
715 u_int channel;
716
717 ahc = *((struct ahc_softc **)sdev->host->hostdata);
422c0d61 718 channel = sdev_channel(sdev);
1da177e4 719
1da177e4 720 bh = scsi_bios_ptable(bdev);
1da177e4
LT		 721 if (bh) {
722 ret = scsi_partsize(bh, capacity,
723 &geom[2], &geom[0], &geom[1]);
1da177e4 724 kfree(bh);
1da177e4
LT		 725 if (ret != -1)
726 return (ret);
727 }
728 heads = 64;
729 sectors = 32;
730 cylinders = aic_sector_div(capacity, heads, sectors);
731
732 if (aic7xxx_extended != 0)
733 extended = 1;
734 else if (channel == 0)
735 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
736 else
737 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
738 if (extended && cylinders >= 1024) {
739 heads = 255;
740 sectors = 63;
741 cylinders = aic_sector_div(capacity, heads, sectors);
742 }
743 geom[0] = heads;
744 geom[1] = sectors;
745 geom[2] = cylinders;
746 return (0);
747}
748#endif
749
750/*
751 * Abort the current SCSI command(s).
752 */
753static int
013791ee 754ahc_linux_abort(struct scsi_cmnd *cmd)
1da177e4
LT		 755{
756 int error;
757
758 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
759 if (error != 0)
48813cf9 760 printk("aic7xxx_abort returns 0x%x\n", error);
1da177e4
LT		 761 return (error);
762}
763
764/*
765 * Attempt to send a target reset message to the device that timed out.
766 */
767static int
013791ee 768ahc_linux_dev_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 769{
770 int error;
771
772 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
773 if (error != 0)
48813cf9 774 printk("aic7xxx_dev_reset returns 0x%x\n", error);
1da177e4
LT		 775 return (error);
776}
777
778/*
779 * Reset the SCSI bus.
780 */
781static int
013791ee 782ahc_linux_bus_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 783{
784 struct ahc_softc *ahc;
1da177e4 785 int found;
68b3aa7c 786 unsigned long flags;
1da177e4
LT		 787
788 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
68b3aa7c
JG		 789
790 ahc_lock(ahc, &flags);
422c0d61 791 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
1da177e4 792 /*initiate reset*/TRUE);
68b3aa7c 793 ahc_unlock(ahc, &flags);
1da177e4
LT		 794
795 if (bootverbose)
48813cf9 796 printk("%s: SCSI bus reset delivered. "
1da177e4
LT		 797 "%d SCBs aborted.\n", ahc_name(ahc), found);
798
799 return SUCCESS;
800}
801
013791ee 802struct scsi_host_template aic7xxx_driver_template = {
1da177e4
LT		 803 .module = THIS_MODULE,
804 .name = "aic7xxx",
dfd287f6 805 .proc_name = "aic7xxx",
6b3a8bbf
AV		 806 .show_info = ahc_linux_show_info,
807 .write_info = ahc_proc_write_seeprom,
1da177e4
LT		 808 .info = ahc_linux_info,
809 .queuecommand = ahc_linux_queue,
810 .eh_abort_handler = ahc_linux_abort,
811 .eh_device_reset_handler = ahc_linux_dev_reset,
812 .eh_bus_reset_handler = ahc_linux_bus_reset,
813#if defined(__i386__)
814 .bios_param = ahc_linux_biosparam,
815#endif
816 .can_queue = AHC_MAX_QUEUE,
817 .this_id = -1,
80f1443c 818 .max_sectors = 8192,
1da177e4
LT		 819 .cmd_per_lun = 2,
820 .use_clustering = ENABLE_CLUSTERING,
821 .slave_alloc = ahc_linux_slave_alloc,
822 .slave_configure = ahc_linux_slave_configure,
b1abb4d6
JB		 823 .target_alloc = ahc_linux_target_alloc,
824 .target_destroy = ahc_linux_target_destroy,
1da177e4
LT		 825};
826
827/**************************** Tasklet Handler *********************************/
828
1da177e4
LT		 829/******************************** Macros **************************************/
830#define BUILD_SCSIID(ahc, cmd) \
831 ((((cmd)->device->id << TID_SHIFT) & TID) \
832 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
833 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
834
835/******************************** Bus DMA *************************************/
836int
837ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
838 bus_size_t alignment, bus_size_t boundary,
839 dma_addr_t lowaddr, dma_addr_t highaddr,
840 bus_dma_filter_t *filter, void *filterarg,
841 bus_size_t maxsize, int nsegments,
842 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
843{
844 bus_dma_tag_t dmat;
845
48813cf9 846 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
1da177e4
LT		 847 if (dmat == NULL)
848 return (ENOMEM);
849
850 /*
851 * Linux is very simplistic about DMA memory. For now don't
852 * maintain all specification information. Once Linux supplies
853 * better facilities for doing these operations, or the
854 * needs of this particular driver change, we might need to do
855 * more here.
856 */
857 dmat->alignment = alignment;
858 dmat->boundary = boundary;
859 dmat->maxsize = maxsize;
860 *ret_tag = dmat;
861 return (0);
862}
863
864void
865ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
866{
48813cf9 867 kfree(dmat);
1da177e4
LT		 868}
869
870int
871ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
872 int flags, bus_dmamap_t *mapp)
873{
1da177e4 874 *vaddr = pci_alloc_consistent(ahc->dev_softc,
7dfa0f26 875 dmat->maxsize, mapp);
1da177e4 876 if (*vaddr == NULL)
7dfa0f26
CH		 877 return ENOMEM;
878 return 0;
1da177e4
LT		 879}
880
881void
882ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
883 void* vaddr, bus_dmamap_t map)
884{
885 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
7dfa0f26 886 vaddr, map);
1da177e4
LT		 887}
888
889int
890ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
891 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
892 void *cb_arg, int flags)
893{
894 /*
895 * Assume for now that this will only be used during
896 * initialization and not for per-transaction buffer mapping.
897 */
898 bus_dma_segment_t stack_sg;
899
7dfa0f26 900 stack_sg.ds_addr = map;
1da177e4
LT		 901 stack_sg.ds_len = dmat->maxsize;
902 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
903 return (0);
904}
905
906void
907ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
908{
1da177e4
LT		 909}
910
911int
912ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
913{
914 /* Nothing to do */
915 return (0);
916}
917
1da177e4
LT		 918static void
919ahc_linux_setup_tag_info_global(char *p)
920{
921 int tags, i, j;
922
923 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
48813cf9 924 printk("Setting Global Tags= %d\n", tags);
1da177e4 925
6391a113 926 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
1da177e4
LT		 927 for (j = 0; j < AHC_NUM_TARGETS; j++) {
928 aic7xxx_tag_info[i].tag_commands[j] = tags;
929 }
930 }
931}
932
933static void
934ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
935{
936
937 if ((instance >= 0) && (targ >= 0)
6391a113 938 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
1da177e4
LT		 939 && (targ < AHC_NUM_TARGETS)) {
940 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
941 if (bootverbose)
48813cf9 942 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1da177e4
LT		 943 }
944}
945
1ff92730
CH		 946static char *
947ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
948 void (*callback)(u_long, int, int, int32_t),
949 u_long callback_arg)
950{
951 char *tok_end;
952 char *tok_end2;
953 int i;
954 int instance;
955 int targ;
956 int done;
957 char tok_list[] = {'.', ',', '{', '}', '\0'};
958
959 /* All options use a ':' name/arg separator */
960 if (*opt_arg != ':')
961 return (opt_arg);
962 opt_arg++;
963 instance = -1;
964 targ = -1;
965 done = FALSE;
966 /*
967 * Restore separator that may be in
968 * the middle of our option argument.
969 */
970 tok_end = strchr(opt_arg, '\0');
971 if (tok_end < end)
972 *tok_end = ',';
973 while (!done) {
974 switch (*opt_arg) {
975 case '{':
976 if (instance == -1) {
977 instance = 0;
978 } else {
979 if (depth > 1) {
980 if (targ == -1)
981 targ = 0;
982 } else {
48813cf9 983 printk("Malformed Option %s\n",
1ff92730
CH		 984 opt_name);
985 done = TRUE;
986 }
987 }
988 opt_arg++;
989 break;
990 case '}':
991 if (targ != -1)
992 targ = -1;
993 else if (instance != -1)
994 instance = -1;
995 opt_arg++;
996 break;
997 case ',':
998 case '.':
999 if (instance == -1)
1000 done = TRUE;
1001 else if (targ >= 0)
1002 targ++;
1003 else if (instance >= 0)
1004 instance++;
1005 opt_arg++;
1006 break;
1007 case '\0':
1008 done = TRUE;
1009 break;
1010 default:
1011 tok_end = end;
1012 for (i = 0; tok_list[i]; i++) {
1013 tok_end2 = strchr(opt_arg, tok_list[i]);
1014 if ((tok_end2) && (tok_end2 < tok_end))
1015 tok_end = tok_end2;
1016 }
1017 callback(callback_arg, instance, targ,
1018 simple_strtol(opt_arg, NULL, 0));
1019 opt_arg = tok_end;
1020 break;
1021 }
1022 }
1023 return (opt_arg);
1024}
1025
1da177e4
LT		 1026/*
1027 * Handle Linux boot parameters. This routine allows for assigning a value
1028 * to a parameter with a ':' between the parameter and the value.
1029 * ie. aic7xxx=stpwlev:1,extended
1030 */
1031static int
1032aic7xxx_setup(char *s)
1033{
1034 int i, n;
1035 char *p;
1036 char *end;
1037
980b306a 1038 static const struct {
1da177e4
LT		 1039 const char *name;
1040 uint32_t *flag;
1041 } options[] = {
1042 { "extended", &aic7xxx_extended },
1043 { "no_reset", &aic7xxx_no_reset },
1044 { "verbose", &aic7xxx_verbose },
1045 { "allow_memio", &aic7xxx_allow_memio},
1046#ifdef AHC_DEBUG
1047 { "debug", &ahc_debug },
1048#endif
1da177e4
LT		 1049 { "periodic_otag", &aic7xxx_periodic_otag },
1050 { "pci_parity", &aic7xxx_pci_parity },
1051 { "seltime", &aic7xxx_seltime },
1052 { "tag_info", NULL },
1053 { "global_tag_depth", NULL },
1054 { "dv", NULL }
1055 };
1056
1057 end = strchr(s, '\0');
1058
1059 /*
6391a113 1060 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1da177e4
LT		 1061 * will never be 0 in this case.
1062 */
1063 n = 0;
1064
1065 while ((p = strsep(&s, ",.")) != NULL) {
1066 if (*p == '\0')
1067 continue;
6391a113 1068 for (i = 0; i < ARRAY_SIZE(options); i++) {
1da177e4
LT		 1069
1070 n = strlen(options[i].name);
1071 if (strncmp(options[i].name, p, n) == 0)
1072 break;
1073 }
6391a113 1074 if (i == ARRAY_SIZE(options))
1da177e4
LT		 1075 continue;
1076
1077 if (strncmp(p, "global_tag_depth", n) == 0) {
1078 ahc_linux_setup_tag_info_global(p + n);
1079 } else if (strncmp(p, "tag_info", n) == 0) {
1ff92730 1080 s = ahc_parse_brace_option("tag_info", p + n, end,
1da177e4 1081 2, ahc_linux_setup_tag_info, 0);
1da177e4
LT		 1082 } else if (p[n] == ':') {
1083 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1084 } else if (strncmp(p, "verbose", n) == 0) {
1085 *(options[i].flag) = 1;
1086 } else {
1087 *(options[i].flag) ^= 0xFFFFFFFF;
1088 }
1089 }
1090 return 1;
1091}
1092
1093__setup("aic7xxx=", aic7xxx_setup);
1094
1095uint32_t aic7xxx_verbose;
1096
1097int
013791ee 1098ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1da177e4 1099{
9e1fe931
JJ		 1100 char buf[80];
1101 struct Scsi_Host *host;
1da177e4 1102 char *new_name;
9e1fe931
JJ		 1103 u_long s;
1104 int retval;
1da177e4
LT		 1105
1106 template->name = ahc->description;
1107 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1108 if (host == NULL)
1109 return (ENOMEM);
1110
1111 *((struct ahc_softc **)host->hostdata) = ahc;
1da177e4
LT		 1112 ahc->platform_data->host = host;
1113 host->can_queue = AHC_MAX_QUEUE;
1114 host->cmd_per_lun = 2;
1115 /* XXX No way to communicate the ID for multiple channels */
1116 host->this_id = ahc->our_id;
1117 host->irq = ahc->platform_data->irq;
1118 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1119 host->max_lun = AHC_NUM_LUNS;
1120 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1121 host->sg_tablesize = AHC_NSEG;
dacee84b 1122 ahc_lock(ahc, &s);
2a40342e 1123 ahc_set_unit(ahc, ahc_linux_unit++);
dacee84b 1124 ahc_unlock(ahc, &s);
1da177e4 1125 sprintf(buf, "scsi%d", host->host_no);
48813cf9 1126 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1da177e4
LT		 1127 if (new_name != NULL) {
1128 strcpy(new_name, buf);
1129 ahc_set_name(ahc, new_name);
1130 }
1131 host->unique_id = ahc->unit;
1da177e4 1132 ahc_linux_initialize_scsi_bus(ahc);
1da177e4 1133 ahc_intr_enable(ahc, TRUE);
1da177e4 1134
92d161c3 1135 host->transportt = ahc_linux_transport_template;
1136
9e1fe931
JJ		 1137 retval = scsi_add_host(host,
1138 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
1139 if (retval) {
1140 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1141 scsi_host_put(host);
1142 return retval;
1143 }
1144
1da177e4 1145 scsi_scan_host(host);
9e1fe931 1146 return 0;
1da177e4
LT		 1147}
1148
1da177e4
LT		 1149/*
1150 * Place the SCSI bus into a known state by either resetting it,
1151 * or forcing transfer negotiations on the next command to any
1152 * target.
1153 */
1154void
1155ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1156{
1157 int i;
1158 int numtarg;
dacee84b 1159 unsigned long s;
1da177e4
LT		 1160
1161 i = 0;
1162 numtarg = 0;
1163
dacee84b
JB		 1164 ahc_lock(ahc, &s);
1165
1da177e4
LT		 1166 if (aic7xxx_no_reset != 0)
1167 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1168
1169 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1170 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1171 else
1172 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1173
1174 if ((ahc->features & AHC_TWIN) != 0) {
1175
1176 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1177 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1178 } else {
1179 if (numtarg == 0)
1180 i = 8;
1181 numtarg += 8;
1182 }
1183 }
1184
1185 /*
1186 * Force negotiation to async for all targets that
1187 * will not see an initial bus reset.
1188 */
1189 for (; i < numtarg; i++) {
1190 struct ahc_devinfo devinfo;
1191 struct ahc_initiator_tinfo *tinfo;
1192 struct ahc_tmode_tstate *tstate;
1193 u_int our_id;
1194 u_int target_id;
1195 char channel;
1196
1197 channel = 'A';
1198 our_id = ahc->our_id;
1199 target_id = i;
1200 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1201 channel = 'B';
1202 our_id = ahc->our_id_b;
1203 target_id = i % 8;
1204 }
1205 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1206 target_id, &tstate);
1207 ahc_compile_devinfo(&devinfo, our_id, target_id,
1208 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1209 ahc_update_neg_request(ahc, &devinfo, tstate,
1210 tinfo, AHC_NEG_ALWAYS);
1211 }
dacee84b 1212 ahc_unlock(ahc, &s);
1da177e4
LT		 1213 /* Give the bus some time to recover */
1214 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1215 ahc_linux_freeze_simq(ahc);
dacee84b
JB		 1216 msleep(AIC7XXX_RESET_DELAY);
1217 ahc_linux_release_simq(ahc);
1da177e4
LT		 1218 }
1219}
1220
1221int
1222ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1223{
1224
1225 ahc->platform_data =
48813cf9 1226 kmalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
1da177e4
LT		 1227 if (ahc->platform_data == NULL)
1228 return (ENOMEM);
1229 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1da177e4 1230 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1da177e4 1231 ahc_lockinit(ahc);
1da177e4
LT		 1232 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1233 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1234 if (aic7xxx_pci_parity == 0)
1235 ahc->flags |= AHC_DISABLE_PCI_PERR;
1236
1237 return (0);
1238}
1239
1240void
1241ahc_platform_free(struct ahc_softc *ahc)
1242{
b1abb4d6 1243 struct scsi_target *starget;
9080063f 1244 int i;
1da177e4
LT		 1245
1246 if (ahc->platform_data != NULL) {
1da177e4
LT		 1247 /* destroy all of the device and target objects */
1248 for (i = 0; i < AHC_NUM_TARGETS; i++) {
b1abb4d6
JB		 1249 starget = ahc->platform_data->starget[i];
1250 if (starget != NULL) {
b1abb4d6 1251 ahc->platform_data->starget[i] = NULL;
1da177e4
LT		 1252 }
1253 }
1254
1255 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1256 free_irq(ahc->platform_data->irq, ahc);
1257 if (ahc->tag == BUS_SPACE_PIO
1258 && ahc->bsh.ioport != 0)
1259 release_region(ahc->bsh.ioport, 256);
1260 if (ahc->tag == BUS_SPACE_MEMIO
1261 && ahc->bsh.maddr != NULL) {
1262 iounmap(ahc->bsh.maddr);
1263 release_mem_region(ahc->platform_data->mem_busaddr,
1264 0x1000);
1265 }
dedd8310 1266
97af50f6
JB		 1267 if (ahc->platform_data->host)
1268 scsi_host_put(ahc->platform_data->host);
1269
48813cf9 1270 kfree(ahc->platform_data);
1da177e4
LT		 1271 }
1272}
1273
1274void
1275ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1276{
1277 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1278 SCB_GET_CHANNEL(ahc, scb),
1279 SCB_GET_LUN(scb), SCB_LIST_NULL,
1280 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1281}
1282
1283void
9080063f
HR		 1284ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1285 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1da177e4
LT		 1286{
1287 struct ahc_linux_device *dev;
1288 int was_queuing;
1289 int now_queuing;
1290
b1abb4d6 1291 if (sdev == NULL)
1da177e4 1292 return;
b1abb4d6
JB		 1293 dev = scsi_transport_device_data(sdev);
1294
1da177e4
LT		 1295 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1296 switch (alg) {
1297 default:
1298 case AHC_QUEUE_NONE:
1299 now_queuing = 0;
1300 break;
1301 case AHC_QUEUE_BASIC:
1302 now_queuing = AHC_DEV_Q_BASIC;
1303 break;
1304 case AHC_QUEUE_TAGGED:
1305 now_queuing = AHC_DEV_Q_TAGGED;
1306 break;
1307 }
1308 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1309 && (was_queuing != now_queuing)
1310 && (dev->active != 0)) {
1311 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1312 dev->qfrozen++;
1313 }
1314
1315 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1316 if (now_queuing) {
1317 u_int usertags;
1318
1319 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1320 if (!was_queuing) {
1321 /*
25985edc 1322 * Start out aggressively and allow our
1da177e4
LT		 1323 * dynamic queue depth algorithm to take
1324 * care of the rest.
1325 */
1326 dev->maxtags = usertags;
1327 dev->openings = dev->maxtags - dev->active;
1328 }
1329 if (dev->maxtags == 0) {
1330 /*
1331 * Queueing is disabled by the user.
1332 */
1333 dev->openings = 1;
1334 } else if (alg == AHC_QUEUE_TAGGED) {
1335 dev->flags |= AHC_DEV_Q_TAGGED;
1336 if (aic7xxx_periodic_otag != 0)
1337 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1338 } else
1339 dev->flags |= AHC_DEV_Q_BASIC;
1340 } else {
1341 /* We can only have one opening. */
1342 dev->maxtags = 0;
1343 dev->openings = 1 - dev->active;
1344 }
b1abb4d6
JB		 1345 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1346 case AHC_DEV_Q_BASIC:
fdd0edf2
JB		 1347 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
1348 scsi_activate_tcq(sdev, dev->openings + dev->active);
b1abb4d6
JB		 1349 break;
1350 case AHC_DEV_Q_TAGGED:
fdd0edf2
JB		 1351 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
1352 scsi_activate_tcq(sdev, dev->openings + dev->active);
b1abb4d6
JB		 1353 break;
1354 default:
1355 /*
1356 * We allow the OS to queue 2 untagged transactions to
1357 * us at any time even though we can only execute them
1358 * serially on the controller/device. This should
1359 * remove some latency.
1360 */
fdd0edf2 1361 scsi_deactivate_tcq(sdev, 2);
b1abb4d6 1362 break;
1da177e4 1363 }
1da177e4
LT		 1364}
1365
1366int
1367ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1368 int lun, u_int tag, role_t role, uint32_t status)
1369{
e4e360c3 1370 return 0;
1da177e4
LT		 1371}
1372
cb624029 1373static u_int
1374ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1da177e4 1375{
cb624029 1376 static int warned_user;
1377 u_int tags;
1da177e4 1378
cb624029 1379 tags = 0;
1380 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
6391a113 1381 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
cb624029 1382 if (warned_user == 0) {
1da177e4 1383
48813cf9 1384 printk(KERN_WARNING
cb624029 1385"aic7xxx: WARNING: Insufficient tag_info instances\n"
1386"aic7xxx: for installed controllers. Using defaults\n"
1387"aic7xxx: Please update the aic7xxx_tag_info array in\n"
1388"aic7xxx: the aic7xxx_osm..c source file.\n");
1389 warned_user++;
1390 }
1391 tags = AHC_MAX_QUEUE;
1392 } else {
1393 adapter_tag_info_t *tag_info;
1da177e4 1394
cb624029 1395 tag_info = &aic7xxx_tag_info[ahc->unit];
1396 tags = tag_info->tag_commands[devinfo->target_offset];
1397 if (tags > AHC_MAX_QUEUE)
1398 tags = AHC_MAX_QUEUE;
1399 }
1da177e4 1400 }
cb624029 1401 return (tags);
1da177e4
LT		 1402}
1403
cb624029 1404/*
1405 * Determines the queue depth for a given device.
1406 */
1da177e4 1407static void
b1abb4d6 1408ahc_linux_device_queue_depth(struct scsi_device *sdev)
1da177e4 1409{
cb624029 1410 struct ahc_devinfo devinfo;
1411 u_int tags;
b1abb4d6 1412 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1da177e4 1413
cb624029 1414 ahc_compile_devinfo(&devinfo,
b1abb4d6 1415 sdev->sdev_target->channel == 0
cb624029 1416 ? ahc->our_id : ahc->our_id_b,
b1abb4d6
JB		 1417 sdev->sdev_target->id, sdev->lun,
1418 sdev->sdev_target->channel == 0 ? 'A' : 'B',
cb624029 1419 ROLE_INITIATOR);
1420 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
b1abb4d6 1421 if (tags != 0 && sdev->tagged_supported != 0) {
1da177e4 1422
9080063f
HR		 1423 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1424 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1425 devinfo.lun, AC_TRANSFER_NEG);
cb624029 1426 ahc_print_devinfo(ahc, &devinfo);
48813cf9 1427 printk("Tagged Queuing enabled. Depth %d\n", tags);
1da177e4 1428 } else {
9080063f
HR		 1429 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1430 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1431 devinfo.lun, AC_TRANSFER_NEG);
1da177e4
LT		 1432 }
1433}
1434
e4e360c3
JB		 1435static int
1436ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1437 struct scsi_cmnd *cmd)
1da177e4 1438{
cb624029 1439 struct scb *scb;
1440 struct hardware_scb *hscb;
1441 struct ahc_initiator_tinfo *tinfo;
1442 struct ahc_tmode_tstate *tstate;
1443 uint16_t mask;
e4e360c3 1444 struct scb_tailq *untagged_q = NULL;
3a57c4a5 1445 int nseg;
1da177e4 1446
e4e360c3
JB		 1447 /*
1448 * Schedule us to run later. The only reason we are not
1449 * running is because the whole controller Q is frozen.
1450 */
1451 if (ahc->platform_data->qfrozen != 0)
1452 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1453
e4e360c3
JB		 1454 /*
1455 * We only allow one untagged transaction
1456 * per target in the initiator role unless
1457 * we are storing a full busy target *lun*
1458 * table in SCB space.
1459 */
1460 if (!blk_rq_tagged(cmd->request)
1461 && (ahc->features & AHC_SCB_BTT) == 0) {
1462 int target_offset;
1da177e4 1463
e4e360c3
JB		 1464 target_offset = cmd->device->id + cmd->device->channel * 8;
1465 untagged_q = &(ahc->untagged_queues[target_offset]);
1466 if (!TAILQ_EMPTY(untagged_q))
1467 /* if we're already executing an untagged command
1468 * we're busy to another */
1469 return SCSI_MLQUEUE_DEVICE_BUSY;
1470 }
1471
647b2425
FT		 1472 nseg = scsi_dma_map(cmd);
1473 if (nseg < 0)
1474 return SCSI_MLQUEUE_HOST_BUSY;
1475
e4e360c3
JB		 1476 /*
1477 * Get an scb to use.
1478 */
8eb37942 1479 scb = ahc_get_scb(ahc);
647b2425
FT		 1480 if (!scb) {
1481 scsi_dma_unmap(cmd);
8eb37942 1482 return SCSI_MLQUEUE_HOST_BUSY;
647b2425 1483 }
1da177e4 1484
e4e360c3
JB		 1485 scb->io_ctx = cmd;
1486 scb->platform_data->dev = dev;
1487 hscb = scb->hscb;
1488 cmd->host_scribble = (char *)scb;
1da177e4 1489
e4e360c3
JB		 1490 /*
1491 * Fill out basics of the HSCB.
1492 */
1493 hscb->control = 0;
1494 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1495 hscb->lun = cmd->device->lun;
1496 mask = SCB_GET_TARGET_MASK(ahc, scb);
1497 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1498 SCB_GET_OUR_ID(scb),
1499 SCB_GET_TARGET(ahc, scb), &tstate);
1500 hscb->scsirate = tinfo->scsirate;
1501 hscb->scsioffset = tinfo->curr.offset;
1502 if ((tstate->ultraenb & mask) != 0)
1503 hscb->control |= ULTRAENB;
1504
1505 if ((ahc->user_discenable & mask) != 0)
1506 hscb->control |= DISCENB;
1507
1508 if ((tstate->auto_negotiate & mask) != 0) {
1509 scb->flags |= SCB_AUTO_NEGOTIATE;
1510 scb->hscb->control |= MK_MESSAGE;
1511 }
1512
1513 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
e4e360c3
JB		 1514 int msg_bytes;
1515 uint8_t tag_msgs[2];
1516
1517 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1518 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1519 hscb->control |= tag_msgs[0];
1520 if (tag_msgs[0] == MSG_ORDERED_TASK)
cb624029 1521 dev->commands_since_idle_or_otag = 0;
dedd8310
CH		 1522 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1523 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
e4e360c3
JB		 1524 hscb->control |= MSG_ORDERED_TASK;
1525 dev->commands_since_idle_or_otag = 0;
cb624029 1526 } else {
e4e360c3 1527 hscb->control |= MSG_SIMPLE_TASK;
cb624029 1528 }
e4e360c3 1529 }
1da177e4 1530
e4e360c3
JB		 1531 hscb->cdb_len = cmd->cmd_len;
1532 if (hscb->cdb_len <= 12) {
1533 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1534 } else {
1535 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1536 scb->flags |= SCB_CDB32_PTR;
1537 }
1da177e4 1538
e4e360c3
JB		 1539 scb->platform_data->xfer_len = 0;
1540 ahc_set_residual(scb, 0);
1541 ahc_set_sense_residual(scb, 0);
1542 scb->sg_count = 0;
3a57c4a5 1543
3a57c4a5 1544 if (nseg > 0) {
e4e360c3
JB		 1545 struct ahc_dma_seg *sg;
1546 struct scatterlist *cur_seg;
3a57c4a5 1547 int i;
e4e360c3 1548
e4e360c3
JB		 1549 /* Copy the segments into the SG list. */
1550 sg = scb->sg_list;
1551 /*
1552 * The sg_count may be larger than nseg if
1553 * a transfer crosses a 32bit page.
3a57c4a5
FT		 1554 */
1555 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1da177e4 1556 dma_addr_t addr;
e4e360c3
JB		 1557 bus_size_t len;
1558 int consumed;
1559
1560 addr = sg_dma_address(cur_seg);
1561 len = sg_dma_len(cur_seg);
1562 consumed = ahc_linux_map_seg(ahc, scb,
1563 sg, addr, len);
1564 sg += consumed;
1565 scb->sg_count += consumed;
1da177e4 1566 }
e4e360c3
JB		 1567 sg--;
1568 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4 1569
e4e360c3
JB		 1570 /*
1571 * Reset the sg list pointer.
1572 */
1573 scb->hscb->sgptr =
1574 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1575
1576 /*
1577 * Copy the first SG into the "current"
1578 * data pointer area.
1579 */
1580 scb->hscb->dataptr = scb->sg_list->addr;
1581 scb->hscb->datacnt = scb->sg_list->len;
e4e360c3
JB		 1582 } else {
1583 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1584 scb->hscb->dataptr = 0;
1585 scb->hscb->datacnt = 0;
1586 scb->sg_count = 0;
1587 }
1588
1589 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1590 dev->openings--;
1591 dev->active++;
1592 dev->commands_issued++;
1593 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1594 dev->commands_since_idle_or_otag++;
1595
1596 scb->flags |= SCB_ACTIVE;
1597 if (untagged_q) {
1598 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1599 scb->flags |= SCB_UNTAGGEDQ;
1da177e4 1600 }
e4e360c3
JB		 1601 ahc_queue_scb(ahc, scb);
1602 return 0;
1da177e4
LT		 1603}
1604
1605/*
1606 * SCSI controller interrupt handler.
1607 */
1608irqreturn_t
7d12e780 1609ahc_linux_isr(int irq, void *dev_id)
1da177e4
LT		 1610{
1611 struct ahc_softc *ahc;
1612 u_long flags;
1613 int ours;
1614
1615 ahc = (struct ahc_softc *) dev_id;
1616 ahc_lock(ahc, &flags);
1617 ours = ahc_intr(ahc);
1da177e4
LT		 1618 ahc_unlock(ahc, &flags);
1619 return IRQ_RETVAL(ours);
1620}
1621
1622void
1623ahc_platform_flushwork(struct ahc_softc *ahc)
1624{
1625
1da177e4
LT		 1626}
1627
1da177e4
LT		 1628void
1629ahc_send_async(struct ahc_softc *ahc, char channel,
9080063f 1630 u_int target, u_int lun, ac_code code)
1da177e4
LT		 1631{
1632 switch (code) {
1633 case AC_TRANSFER_NEG:
1634 {
b1abb4d6 1635 struct scsi_target *starget;
1da177e4 1636 struct ahc_linux_target *targ;
1da177e4
LT		 1637 struct ahc_initiator_tinfo *tinfo;
1638 struct ahc_tmode_tstate *tstate;
1639 int target_offset;
b1abb4d6
JB		 1640 unsigned int target_ppr_options;
1641
1642 BUG_ON(target == CAM_TARGET_WILDCARD);
1da177e4 1643
1da177e4
LT		 1644 tinfo = ahc_fetch_transinfo(ahc, channel,
1645 channel == 'A' ? ahc->our_id
1646 : ahc->our_id_b,
1647 target, &tstate);
1648
1649 /*
1650 * Don't bother reporting results while
1651 * negotiations are still pending.
1652 */
1653 if (tinfo->curr.period != tinfo->goal.period
1654 || tinfo->curr.width != tinfo->goal.width
1655 || tinfo->curr.offset != tinfo->goal.offset
1656 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1657 if (bootverbose == 0)
1658 break;
1659
1660 /*
1661 * Don't bother reporting results that
1662 * are identical to those last reported.
1663 */
1664 target_offset = target;
1665 if (channel == 'B')
1666 target_offset += 8;
b1abb4d6 1667 starget = ahc->platform_data->starget[target_offset];
fc789a93 1668 if (starget == NULL)
1da177e4 1669 break;
fc789a93 1670 targ = scsi_transport_target_data(starget);
b1abb4d6
JB		 1671
1672 target_ppr_options =
1673 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1674 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1675 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1676
1677 if (tinfo->curr.period == spi_period(starget)
1678 && tinfo->curr.width == spi_width(starget)
1679 && tinfo->curr.offset == spi_offset(starget)
1680 && tinfo->curr.ppr_options == target_ppr_options)
1da177e4
LT		 1681 if (bootverbose == 0)
1682 break;
1683
b1abb4d6
JB		 1684 spi_period(starget) = tinfo->curr.period;
1685 spi_width(starget) = tinfo->curr.width;
1686 spi_offset(starget) = tinfo->curr.offset;
f7ff898a
JB		 1687 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1688 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1689 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
b1abb4d6 1690 spi_display_xfer_agreement(starget);
1da177e4
LT		 1691 break;
1692 }
1693 case AC_SENT_BDR:
1694 {
1da177e4
LT		 1695 WARN_ON(lun != CAM_LUN_WILDCARD);
1696 scsi_report_device_reset(ahc->platform_data->host,
1697 channel - 'A', target);
1da177e4
LT		 1698 break;
1699 }
1700 case AC_BUS_RESET:
1701 if (ahc->platform_data->host != NULL) {
1702 scsi_report_bus_reset(ahc->platform_data->host,
1703 channel - 'A');
1704 }
1705 break;
1706 default:
1707 panic("ahc_send_async: Unexpected async event");
1708 }
1709}
1710
1711/*
1712 * Calls the higher level scsi done function and frees the scb.
1713 */
1714void
1715ahc_done(struct ahc_softc *ahc, struct scb *scb)
1716{
013791ee 1717 struct scsi_cmnd *cmd;
1da177e4
LT		 1718 struct ahc_linux_device *dev;
1719
1720 LIST_REMOVE(scb, pending_links);
1721 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1722 struct scb_tailq *untagged_q;
1723 int target_offset;
1724
1725 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1726 untagged_q = &(ahc->untagged_queues[target_offset]);
1727 TAILQ_REMOVE(untagged_q, scb, links.tqe);
e4e360c3 1728 BUG_ON(!TAILQ_EMPTY(untagged_q));
969ceffb
DM		 1729 } else if ((scb->flags & SCB_ACTIVE) == 0) {
1730 /*
1731 * Transactions aborted from the untagged queue may
1732 * not have been dispatched to the controller, so
1733 * only check the SCB_ACTIVE flag for tagged transactions.
1734 */
48813cf9 1735 printk("SCB %d done'd twice\n", scb->hscb->tag);
1da177e4
LT		 1736 ahc_dump_card_state(ahc);
1737 panic("Stopping for safety");
1738 }
1739 cmd = scb->io_ctx;
1740 dev = scb->platform_data->dev;
1741 dev->active--;
1742 dev->openings++;
1743 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1744 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1745 dev->qfrozen--;
1746 }
1747 ahc_linux_unmap_scb(ahc, scb);
1748
1749 /*
1750 * Guard against stale sense data.
1751 * The Linux mid-layer assumes that sense
1752 * was retrieved anytime the first byte of
1753 * the sense buffer looks "sane".
1754 */
1755 cmd->sense_buffer[0] = 0;
1756 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1757 uint32_t amount_xferred;
1758
1759 amount_xferred =
1760 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1761 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1762#ifdef AHC_DEBUG
1763 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1764 ahc_print_path(ahc, scb);
48813cf9 1765 printk("Set CAM_UNCOR_PARITY\n");
1da177e4
LT		 1766 }
1767#endif
1768 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1769#ifdef AHC_REPORT_UNDERFLOWS
1770 /*
1771 * This code is disabled by default as some
1772 * clients of the SCSI system do not properly
1773 * initialize the underflow parameter. This
1774 * results in spurious termination of commands
1775 * that complete as expected (e.g. underflow is
1776 * allowed as command can return variable amounts
1777 * of data.
1778 */
1779 } else if (amount_xferred < scb->io_ctx->underflow) {
1780 u_int i;
1781
1782 ahc_print_path(ahc, scb);
48813cf9 1783 printk("CDB:");
1da177e4 1784 for (i = 0; i < scb->io_ctx->cmd_len; i++)
48813cf9
PE		 1785 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1786 printk("\n");
1da177e4 1787 ahc_print_path(ahc, scb);
48813cf9 1788 printk("Saw underflow (%ld of %ld bytes). "
1da177e4
LT		 1789 "Treated as error\n",
1790 ahc_get_residual(scb),
1791 ahc_get_transfer_length(scb));
1792 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1793#endif
1794 } else {
1795 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1796 }
1797 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
b1abb4d6 1798 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1da177e4 1799 }
1da177e4
LT		 1800
1801 if (dev->openings == 1
1802 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1803 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1804 dev->tag_success_count++;
1805 /*
1806 * Some devices deal with temporary internal resource
1807 * shortages by returning queue full. When the queue
1808 * full occurrs, we throttle back. Slowly try to get
1809 * back to our previous queue depth.
1810 */
1811 if ((dev->openings + dev->active) < dev->maxtags
1812 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1813 dev->tag_success_count = 0;
1814 dev->openings++;
1815 }
1816
1817 if (dev->active == 0)
1818 dev->commands_since_idle_or_otag = 0;
1819
1da177e4 1820 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
48813cf9 1821 printk("Recovery SCB completes\n");
1da177e4
LT		 1822 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1823 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1824 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
8cac8145
CH		 1825
1826 if (ahc->platform_data->eh_done)
1827 complete(ahc->platform_data->eh_done);
1da177e4
LT		 1828 }
1829
1830 ahc_free_scb(ahc, scb);
1831 ahc_linux_queue_cmd_complete(ahc, cmd);
1da177e4
LT		 1832}
1833
1834static void
1835ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
b1abb4d6 1836 struct scsi_device *sdev, struct scb *scb)
1da177e4
LT		 1837{
1838 struct ahc_devinfo devinfo;
b1abb4d6 1839 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1da177e4
LT		 1840
1841 ahc_compile_devinfo(&devinfo,
1842 ahc->our_id,
b1abb4d6
JB		 1843 sdev->sdev_target->id, sdev->lun,
1844 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1da177e4
LT		 1845 ROLE_INITIATOR);
1846
1847 /*
1848 * We don't currently trust the mid-layer to
1849 * properly deal with queue full or busy. So,
1850 * when one occurs, we tell the mid-layer to
1851 * unconditionally requeue the command to us
1852 * so that we can retry it ourselves. We also
1853 * implement our own throttling mechanism so
1854 * we don't clobber the device with too many
1855 * commands.
1856 */
1857 switch (ahc_get_scsi_status(scb)) {
1858 default:
1859 break;
1860 case SCSI_STATUS_CHECK_COND:
1861 case SCSI_STATUS_CMD_TERMINATED:
1862 {
013791ee 1863 struct scsi_cmnd *cmd;
1da177e4
LT		 1864
1865 /*
1866 * Copy sense information to the OS's cmd
1867 * structure if it is available.
1868 */
1869 cmd = scb->io_ctx;
1870 if (scb->flags & SCB_SENSE) {
1871 u_int sense_size;
1872
6d07cb71 1873 sense_size = min(sizeof(struct scsi_sense_data)
1da177e4 1874 - ahc_get_sense_residual(scb),
b80ca4f7 1875 (u_long)SCSI_SENSE_BUFFERSIZE);
1da177e4
LT		 1876 memcpy(cmd->sense_buffer,
1877 ahc_get_sense_buf(ahc, scb), sense_size);
b80ca4f7 1878 if (sense_size < SCSI_SENSE_BUFFERSIZE)
1da177e4 1879 memset(&cmd->sense_buffer[sense_size], 0,
b80ca4f7 1880 SCSI_SENSE_BUFFERSIZE - sense_size);
1da177e4
LT		 1881 cmd->result |= (DRIVER_SENSE << 24);
1882#ifdef AHC_DEBUG
1883 if (ahc_debug & AHC_SHOW_SENSE) {
1884 int i;
1885
48813cf9 1886 printk("Copied %d bytes of sense data:",
1da177e4
LT		 1887 sense_size);
1888 for (i = 0; i < sense_size; i++) {
1889 if ((i & 0xF) == 0)
48813cf9
PE		 1890 printk("\n");
1891 printk("0x%x ", cmd->sense_buffer[i]);
1da177e4 1892 }
48813cf9 1893 printk("\n");
1da177e4
LT		 1894 }
1895#endif
1896 }
1897 break;
1898 }
1899 case SCSI_STATUS_QUEUE_FULL:
1900 {
1901 /*
1902 * By the time the core driver has returned this
1903 * command, all other commands that were queued
1904 * to us but not the device have been returned.
1905 * This ensures that dev->active is equal to
1906 * the number of commands actually queued to
1907 * the device.
1908 */
1909 dev->tag_success_count = 0;
1910 if (dev->active != 0) {
1911 /*
1912 * Drop our opening count to the number
1913 * of commands currently outstanding.
1914 */
1915 dev->openings = 0;
1916/*
1917 ahc_print_path(ahc, scb);
48813cf9 1918 printk("Dropping tag count to %d\n", dev->active);
1da177e4
LT		 1919 */
1920 if (dev->active == dev->tags_on_last_queuefull) {
1921
1922 dev->last_queuefull_same_count++;
1923 /*
1924 * If we repeatedly see a queue full
1925 * at the same queue depth, this
1926 * device has a fixed number of tag
1927 * slots. Lock in this tag depth
1928 * so we stop seeing queue fulls from
1929 * this device.
1930 */
1931 if (dev->last_queuefull_same_count
1932 == AHC_LOCK_TAGS_COUNT) {
1933 dev->maxtags = dev->active;
1934 ahc_print_path(ahc, scb);
48813cf9 1935 printk("Locking max tag count at %d\n",
1da177e4
LT		 1936 dev->active);
1937 }
1938 } else {
1939 dev->tags_on_last_queuefull = dev->active;
1940 dev->last_queuefull_same_count = 0;
1941 }
1942 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1943 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
9080063f 1944 ahc_platform_set_tags(ahc, sdev, &devinfo,
1da177e4
LT		 1945 (dev->flags & AHC_DEV_Q_BASIC)
1946 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1947 break;
1948 }
1949 /*
1950 * Drop down to a single opening, and treat this
1951 * as if the target returned BUSY SCSI status.
1952 */
1953 dev->openings = 1;
1954 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
9080063f 1955 ahc_platform_set_tags(ahc, sdev, &devinfo,
1da177e4
LT		 1956 (dev->flags & AHC_DEV_Q_BASIC)
1957 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1da177e4
LT		 1958 break;
1959 }
1960 }
1961}
1962
1963static void
013791ee 1964ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1da177e4 1965{
1da177e4
LT		 1966 /*
1967 * Map CAM error codes into Linux Error codes. We
1968 * avoid the conversion so that the DV code has the
1969 * full error information available when making
1970 * state change decisions.
1971 */
cb624029 1972 {
1da177e4
LT		 1973 u_int new_status;
1974
1975 switch (ahc_cmd_get_transaction_status(cmd)) {
1976 case CAM_REQ_INPROG:
1977 case CAM_REQ_CMP:
1978 case CAM_SCSI_STATUS_ERROR:
1979 new_status = DID_OK;
1980 break;
1981 case CAM_REQ_ABORTED:
1982 new_status = DID_ABORT;
1983 break;
1984 case CAM_BUSY:
1985 new_status = DID_BUS_BUSY;
1986 break;
1987 case CAM_REQ_INVALID:
1988 case CAM_PATH_INVALID:
1989 new_status = DID_BAD_TARGET;
1990 break;
1991 case CAM_SEL_TIMEOUT:
1992 new_status = DID_NO_CONNECT;
1993 break;
1994 case CAM_SCSI_BUS_RESET:
1995 case CAM_BDR_SENT:
1996 new_status = DID_RESET;
1997 break;
1998 case CAM_UNCOR_PARITY:
1999 new_status = DID_PARITY;
2000 break;
2001 case CAM_CMD_TIMEOUT:
2002 new_status = DID_TIME_OUT;
2003 break;
2004 case CAM_UA_ABORT:
2005 case CAM_REQ_CMP_ERR:
2006 case CAM_AUTOSENSE_FAIL:
2007 case CAM_NO_HBA:
2008 case CAM_DATA_RUN_ERR:
2009 case CAM_UNEXP_BUSFREE:
2010 case CAM_SEQUENCE_FAIL:
2011 case CAM_CCB_LEN_ERR:
2012 case CAM_PROVIDE_FAIL:
2013 case CAM_REQ_TERMIO:
2014 case CAM_UNREC_HBA_ERROR:
2015 case CAM_REQ_TOO_BIG:
2016 new_status = DID_ERROR;
2017 break;
2018 case CAM_REQUEUE_REQ:
8e45ebcc 2019 new_status = DID_REQUEUE;
1da177e4
LT		 2020 break;
2021 default:
2022 /* We should never get here */
2023 new_status = DID_ERROR;
2024 break;
2025 }
2026
2027 ahc_cmd_set_transaction_status(cmd, new_status);
2028 }
2029
8e45ebcc 2030 cmd->scsi_done(cmd);
1da177e4
LT		 2031}
2032
1da177e4
LT		 2033static void
2034ahc_linux_freeze_simq(struct ahc_softc *ahc)
2035{
dacee84b
JB		 2036 unsigned long s;
2037
2038 ahc_lock(ahc, &s);
1da177e4
LT		 2039 ahc->platform_data->qfrozen++;
2040 if (ahc->platform_data->qfrozen == 1) {
2041 scsi_block_requests(ahc->platform_data->host);
2042
2043 /* XXX What about Twin channels? */
2044 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2045 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2046 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2047 }
dacee84b 2048 ahc_unlock(ahc, &s);
1da177e4
LT		 2049}
2050
2051static void
dacee84b 2052ahc_linux_release_simq(struct ahc_softc *ahc)
1da177e4 2053{
1da177e4
LT		 2054 u_long s;
2055 int unblock_reqs;
2056
1da177e4
LT		 2057 unblock_reqs = 0;
2058 ahc_lock(ahc, &s);
2059 if (ahc->platform_data->qfrozen > 0)
2060 ahc->platform_data->qfrozen--;
2061 if (ahc->platform_data->qfrozen == 0)
2062 unblock_reqs = 1;
1da177e4
LT		 2063 ahc_unlock(ahc, &s);
2064 /*
2065 * There is still a race here. The mid-layer
2066 * should keep its own freeze count and use
2067 * a bottom half handler to run the queues
2068 * so we can unblock with our own lock held.
2069 */
2070 if (unblock_reqs)
2071 scsi_unblock_requests(ahc->platform_data->host);
2072}
2073
1da177e4 2074static int
013791ee 2075ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
1da177e4
LT		 2076{
2077 struct ahc_softc *ahc;
1da177e4
LT		 2078 struct ahc_linux_device *dev;
2079 struct scb *pending_scb;
1da177e4
LT		 2080 u_int saved_scbptr;
2081 u_int active_scb_index;
2082 u_int last_phase;
2083 u_int saved_scsiid;
2084 u_int cdb_byte;
2085 int retval;
2086 int was_paused;
2087 int paused;
2088 int wait;
2089 int disconnected;
6d5e9fd1 2090 unsigned long flags;
1da177e4
LT		 2091
2092 pending_scb = NULL;
2093 paused = FALSE;
2094 wait = FALSE;
2095 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
1da177e4 2096
017560fc 2097 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
1da177e4
LT		 2098 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2099
48813cf9 2100 printk("CDB:");
1da177e4 2101 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
48813cf9
PE		 2102 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2103 printk("\n");
1da177e4 2104
6d5e9fd1 2105 ahc_lock(ahc, &flags);
8fa728a2 2106
1da177e4
LT		 2107 /*
2108 * First determine if we currently own this command.
2109 * Start by searching the device queue. If not found
2110 * there, check the pending_scb list. If not found
2111 * at all, and the system wanted us to just abort the
2112 * command, return success.
2113 */
b1abb4d6 2114 dev = scsi_transport_device_data(cmd->device);
1da177e4
LT		 2115
2116 if (dev == NULL) {
2117 /*
2118 * No target device for this command exists,
2119 * so we must not still own the command.
2120 */
48813cf9 2121 printk("%s:%d:%d:%d: Is not an active device\n",
1da177e4
LT		 2122 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2123 cmd->device->lun);
2124 retval = SUCCESS;
2125 goto no_cmd;
2126 }
2127
1da177e4
LT		 2128 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2129 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2130 cmd->device->channel + 'A',
2131 cmd->device->lun,
2132 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
48813cf9 2133 printk("%s:%d:%d:%d: Command found on untagged queue\n",
1da177e4
LT		 2134 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2135 cmd->device->lun);
2136 retval = SUCCESS;
2137 goto done;
2138 }
2139
2140 /*
2141 * See if we can find a matching cmd in the pending list.
2142 */
2143 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2144 if (pending_scb->io_ctx == cmd)
2145 break;
2146 }
2147
2148 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2149
2150 /* Any SCB for this device will do for a target reset */
2151 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
422c0d61
JG		 2152 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2153 scmd_channel(cmd) + 'A',
1da177e4 2154 CAM_LUN_WILDCARD,
dce20067 2155 SCB_LIST_NULL, ROLE_INITIATOR))
1da177e4
LT		 2156 break;
2157 }
2158 }
2159
2160 if (pending_scb == NULL) {
017560fc 2161 scmd_printk(KERN_INFO, cmd, "Command not found\n");
1da177e4
LT		 2162 goto no_cmd;
2163 }
2164
2165 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2166 /*
2167 * We can't queue two recovery actions using the same SCB
2168 */
2169 retval = FAILED;
2170 goto done;
2171 }
2172
2173 /*
2174 * Ensure that the card doesn't do anything
2175 * behind our back and that we didn't "just" miss
2176 * an interrupt that would affect this cmd.
2177 */
2178 was_paused = ahc_is_paused(ahc);
2179 ahc_pause_and_flushwork(ahc);
2180 paused = TRUE;
2181
2182 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
017560fc 2183 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
1da177e4
LT		 2184 goto no_cmd;
2185 }
2186
48813cf9 2187 printk("%s: At time of recovery, card was %spaused\n",
1da177e4
LT		 2188 ahc_name(ahc), was_paused ? "" : "not ");
2189 ahc_dump_card_state(ahc);
2190
2191 disconnected = TRUE;
2192 if (flag == SCB_ABORT) {
2193 if (ahc_search_qinfifo(ahc, cmd->device->id,
2194 cmd->device->channel + 'A',
2195 cmd->device->lun,
2196 pending_scb->hscb->tag,
2197 ROLE_INITIATOR, CAM_REQ_ABORTED,
2198 SEARCH_COMPLETE) > 0) {
48813cf9 2199 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
1da177e4
LT		 2200 ahc_name(ahc), cmd->device->channel,
2201 cmd->device->id, cmd->device->lun);
2202 retval = SUCCESS;
2203 goto done;
2204 }
2205 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2206 cmd->device->channel + 'A',
2207 cmd->device->lun, pending_scb->hscb->tag,
2208 ROLE_INITIATOR, /*status*/0,
2209 SEARCH_COUNT) > 0) {
2210 disconnected = FALSE;
2211 }
2212
2213 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2214 struct scb *bus_scb;
2215
2216 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2217 if (bus_scb == pending_scb)
2218 disconnected = FALSE;
2219 else if (flag != SCB_ABORT
2220 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2221 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2222 disconnected = FALSE;
2223 }
2224
2225 /*
2226 * At this point, pending_scb is the scb associated with the
2227 * passed in command. That command is currently active on the
2228 * bus, is in the disconnected state, or we're hoping to find
2229 * a command for the same target active on the bus to abuse to
2230 * send a BDR. Queue the appropriate message based on which of
2231 * these states we are in.
2232 */
2233 last_phase = ahc_inb(ahc, LASTPHASE);
2234 saved_scbptr = ahc_inb(ahc, SCBPTR);
2235 active_scb_index = ahc_inb(ahc, SCB_TAG);
2236 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2237 if (last_phase != P_BUSFREE
2238 && (pending_scb->hscb->tag == active_scb_index
2239 || (flag == SCB_DEVICE_RESET
422c0d61 2240 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
1da177e4
LT		 2241
2242 /*
2243 * We're active on the bus, so assert ATN
2244 * and hope that the target responds.
2245 */
2246 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2247 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2248 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2249 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
017560fc 2250 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
1da177e4
LT		 2251 wait = TRUE;
2252 } else if (disconnected) {
2253
2254 /*
2255 * Actually re-queue this SCB in an attempt
2256 * to select the device before it reconnects.
2257 * In either case (selection or reselection),
2258 * we will now issue the approprate message
2259 * to the timed-out device.
2260 *
2261 * Set the MK_MESSAGE control bit indicating
2262 * that we desire to send a message. We
2263 * also set the disconnected flag since
2264 * in the paging case there is no guarantee
2265 * that our SCB control byte matches the
2266 * version on the card. We don't want the
2267 * sequencer to abort the command thinking
2268 * an unsolicited reselection occurred.
2269 */
2270 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2271 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2272
2273 /*
2274 * Remove any cached copy of this SCB in the
2275 * disconnected list in preparation for the
2276 * queuing of our abort SCB. We use the
2277 * same element in the SCB, SCB_NEXT, for
2278 * both the qinfifo and the disconnected list.
2279 */
2280 ahc_search_disc_list(ahc, cmd->device->id,
2281 cmd->device->channel + 'A',
2282 cmd->device->lun, pending_scb->hscb->tag,
2283 /*stop_on_first*/TRUE,
2284 /*remove*/TRUE,
2285 /*save_state*/FALSE);
2286
2287 /*
2288 * In the non-paging case, the sequencer will
2289 * never re-reference the in-core SCB.
2290 * To make sure we are notified during
b71a8eb0 2291 * reselection, set the MK_MESSAGE flag in
1da177e4
LT		 2292 * the card's copy of the SCB.
2293 */
2294 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2295 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2296 ahc_outb(ahc, SCB_CONTROL,
2297 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2298 }
2299
2300 /*
2301 * Clear out any entries in the QINFIFO first
2302 * so we are the next SCB for this target
2303 * to run.
2304 */
2305 ahc_search_qinfifo(ahc, cmd->device->id,
2306 cmd->device->channel + 'A',
2307 cmd->device->lun, SCB_LIST_NULL,
2308 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2309 SEARCH_COMPLETE);
2310 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2311 ahc_outb(ahc, SCBPTR, saved_scbptr);
2312 ahc_print_path(ahc, pending_scb);
48813cf9 2313 printk("Device is disconnected, re-queuing SCB\n");
1da177e4
LT		 2314 wait = TRUE;
2315 } else {
017560fc 2316 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
1da177e4
LT		 2317 retval = FAILED;
2318 goto done;
2319 }
2320
2321no_cmd:
2322 /*
2323 * Our assumption is that if we don't have the command, no
2324 * recovery action was required, so we return success. Again,
2325 * the semantics of the mid-layer recovery engine are not
2326 * well defined, so this may change in time.
2327 */
2328 retval = SUCCESS;
2329done:
2330 if (paused)
2331 ahc_unpause(ahc);
2332 if (wait) {
6e9a4738 2333 DECLARE_COMPLETION_ONSTACK(done);
1da177e4 2334
8cac8145 2335 ahc->platform_data->eh_done = &done;
6d5e9fd1
CH		 2336 ahc_unlock(ahc, &flags);
2337
48813cf9 2338 printk("Recovery code sleeping\n");
8cac8145
CH		 2339 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2340 ahc_lock(ahc, &flags);
2341 ahc->platform_data->eh_done = NULL;
2342 ahc_unlock(ahc, &flags);
2343
48813cf9 2344 printk("Timer Expired\n");
1da177e4
LT		 2345 retval = FAILED;
2346 }
48813cf9 2347 printk("Recovery code awake\n");
6d5e9fd1
CH		 2348 } else
2349 ahc_unlock(ahc, &flags);
1da177e4
LT		 2350 return (retval);
2351}
2352
2353void
2354ahc_platform_dump_card_state(struct ahc_softc *ahc)
2355{
1da177e4
LT		 2356}
2357
fad01ef8
JB		 2358static void ahc_linux_set_width(struct scsi_target *starget, int width)
2359{
2360 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2361 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2362 struct ahc_devinfo devinfo;
2363 unsigned long flags;
2364
2365 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2366 starget->channel + 'A', ROLE_INITIATOR);
2367 ahc_lock(ahc, &flags);
2368 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2369 ahc_unlock(ahc, &flags);
2370}
2371
92d161c3 2372static void ahc_linux_set_period(struct scsi_target *starget, int period)
2373{
2374 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2375 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2376 struct ahc_tmode_tstate *tstate;
2377 struct ahc_initiator_tinfo *tinfo
2378 = ahc_fetch_transinfo(ahc,
2379 starget->channel + 'A',
2380 shost->this_id, starget->id, &tstate);
2381 struct ahc_devinfo devinfo;
597487b9 2382 unsigned int ppr_options = tinfo->goal.ppr_options;
92d161c3 2383 unsigned long flags;
597487b9 2384 unsigned long offset = tinfo->goal.offset;
d1d7b19d 2385 const struct ahc_syncrate *syncrate;
92d161c3 2386
2387 if (offset == 0)
2388 offset = MAX_OFFSET;
2389
2bf2c568
JB		 2390 if (period < 9)
2391 period = 9; /* 12.5ns is our minimum */
0f82cb92
JB		 2392 if (period == 9) {
2393 if (spi_max_width(starget))
2394 ppr_options |= MSG_EXT_PPR_DT_REQ;
2395 else
2396 /* need wide for DT and need DT for 12.5 ns */
2397 period = 10;
2398 }
2bf2c568 2399
92d161c3 2400 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2401 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8
JB		 2402
2403 /* all PPR requests apart from QAS require wide transfers */
2404 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
fad01ef8
JB		 2405 if (spi_width(starget) == 0)
2406 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2407 }
2408
92d161c3 2409 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2410 ahc_lock(ahc, &flags);
2411 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2412 ppr_options, AHC_TRANS_GOAL, FALSE);
2413 ahc_unlock(ahc, &flags);
2414}
2415
92d161c3 2416static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2417{
2418 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2419 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2420 struct ahc_tmode_tstate *tstate;
2421 struct ahc_initiator_tinfo *tinfo
2422 = ahc_fetch_transinfo(ahc,
2423 starget->channel + 'A',
2424 shost->this_id, starget->id, &tstate);
2425 struct ahc_devinfo devinfo;
2426 unsigned int ppr_options = 0;
2427 unsigned int period = 0;
2428 unsigned long flags;
d1d7b19d 2429 const struct ahc_syncrate *syncrate = NULL;
92d161c3 2430
2431 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2432 starget->channel + 'A', ROLE_INITIATOR);
2433 if (offset != 0) {
2434 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
597487b9
JB		 2435 period = tinfo->goal.period;
2436 ppr_options = tinfo->goal.ppr_options;
92d161c3 2437 }
2438 ahc_lock(ahc, &flags);
2439 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2440 ppr_options, AHC_TRANS_GOAL, FALSE);
2441 ahc_unlock(ahc, &flags);
2442}
2443
92d161c3 2444static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2445{
2446 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2447 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2448 struct ahc_tmode_tstate *tstate;
2449 struct ahc_initiator_tinfo *tinfo
2450 = ahc_fetch_transinfo(ahc,
2451 starget->channel + 'A',
2452 shost->this_id, starget->id, &tstate);
2453 struct ahc_devinfo devinfo;
597487b9 2454 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2455 & ~MSG_EXT_PPR_DT_REQ;
597487b9 2456 unsigned int period = tinfo->goal.period;
84e66ee7 2457 unsigned int width = tinfo->goal.width;
92d161c3 2458 unsigned long flags;
d1d7b19d 2459 const struct ahc_syncrate *syncrate;
92d161c3 2460
0f82cb92 2461 if (dt && spi_max_width(starget)) {
2bf2c568 2462 ppr_options |= MSG_EXT_PPR_DT_REQ;
84e66ee7
JB		 2463 if (!width)
2464 ahc_linux_set_width(starget, 1);
2465 } else if (period == 9)
2bf2c568
JB		 2466 period = 10; /* if resetting DT, period must be >= 25ns */
2467
92d161c3 2468 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2469 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2470 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
92d161c3 2471 ahc_lock(ahc, &flags);
597487b9 2472 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3 2473 ppr_options, AHC_TRANS_GOAL, FALSE);
2474 ahc_unlock(ahc, &flags);
2475}
2476
ace4e718
JB		 2477#if 0
2478/* FIXME: This code claims to support IU and QAS. However, the actual
2479 * sequencer code and aic7xxx_core have no support for these parameters and
2480 * will get into a bad state if they're negotiated. Do not enable this
2481 * unless you know what you're doing */
92d161c3 2482static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2483{
2484 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2485 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2486 struct ahc_tmode_tstate *tstate;
2487 struct ahc_initiator_tinfo *tinfo
2488 = ahc_fetch_transinfo(ahc,
2489 starget->channel + 'A',
2490 shost->this_id, starget->id, &tstate);
2491 struct ahc_devinfo devinfo;
597487b9 2492 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2493 & ~MSG_EXT_PPR_QAS_REQ;
597487b9 2494 unsigned int period = tinfo->goal.period;
92d161c3 2495 unsigned long flags;
2496 struct ahc_syncrate *syncrate;
2497
2498 if (qas)
2499 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2500
2501 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2502 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2503 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2504 ahc_lock(ahc, &flags);
597487b9 2505 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3 2506 ppr_options, AHC_TRANS_GOAL, FALSE);
2507 ahc_unlock(ahc, &flags);
2508}
2509
92d161c3 2510static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2511{
2512 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2513 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2514 struct ahc_tmode_tstate *tstate;
2515 struct ahc_initiator_tinfo *tinfo
2516 = ahc_fetch_transinfo(ahc,
2517 starget->channel + 'A',
2518 shost->this_id, starget->id, &tstate);
2519 struct ahc_devinfo devinfo;
597487b9 2520 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2521 & ~MSG_EXT_PPR_IU_REQ;
597487b9 2522 unsigned int period = tinfo->goal.period;
92d161c3 2523 unsigned long flags;
2524 struct ahc_syncrate *syncrate;
2525
2526 if (iu)
2527 ppr_options |= MSG_EXT_PPR_IU_REQ;
2528
2529 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2530 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2531 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2532 ahc_lock(ahc, &flags);
597487b9 2533 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3 2534 ppr_options, AHC_TRANS_GOAL, FALSE);
2535 ahc_unlock(ahc, &flags);
2536}
ace4e718 2537#endif
92d161c3 2538
b2d8bfe1
JB		 2539static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2540{
2541 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
cf2b5d3f 2542 unsigned long flags;
3e3c60e3 2543 u8 mode;
b2d8bfe1 2544
3e3c60e3
JB		 2545 if (!(ahc->features & AHC_ULTRA2)) {
2546 /* non-LVD chipset, may not have SBLKCTL reg */
b2d8bfe1
JB		 2547 spi_signalling(shost) =
2548 ahc->features & AHC_HVD ?
2549 SPI_SIGNAL_HVD :
2550 SPI_SIGNAL_SE;
3e3c60e3
JB		 2551 return;
2552 }
2553
cf2b5d3f
DL		 2554 ahc_lock(ahc, &flags);
2555 ahc_pause(ahc);
3e3c60e3 2556 mode = ahc_inb(ahc, SBLKCTL);
cf2b5d3f
DL		 2557 ahc_unpause(ahc);
2558 ahc_unlock(ahc, &flags);
3e3c60e3
JB		 2559
2560 if (mode & ENAB40)
2561 spi_signalling(shost) = SPI_SIGNAL_LVD;
2562 else if (mode & ENAB20)
2563 spi_signalling(shost) = SPI_SIGNAL_SE;
b2d8bfe1
JB		 2564 else
2565 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2566}
2567
92d161c3 2568static struct spi_function_template ahc_linux_transport_functions = {
92d161c3 2569 .set_offset = ahc_linux_set_offset,
2570 .show_offset = 1,
92d161c3 2571 .set_period = ahc_linux_set_period,
2572 .show_period = 1,
92d161c3 2573 .set_width = ahc_linux_set_width,
2574 .show_width = 1,
92d161c3 2575 .set_dt = ahc_linux_set_dt,
2576 .show_dt = 1,
ace4e718 2577#if 0
92d161c3 2578 .set_iu = ahc_linux_set_iu,
2579 .show_iu = 1,
92d161c3 2580 .set_qas = ahc_linux_set_qas,
2581 .show_qas = 1,
ace4e718 2582#endif
b2d8bfe1 2583 .get_signalling = ahc_linux_get_signalling,
92d161c3 2584};
2585
2586
2587
1da177e4
LT		 2588static int __init
2589ahc_linux_init(void)
2590{
dfd287f6
CH		 2591 /*
2592 * If we've been passed any parameters, process them now.
2593 */
2594 if (aic7xxx)
2595 aic7xxx_setup(aic7xxx);
2596
2597 ahc_linux_transport_template =
2598 spi_attach_transport(&ahc_linux_transport_functions);
92d161c3 2599 if (!ahc_linux_transport_template)
2600 return -ENODEV;
dfd287f6 2601
b1abb4d6
JB		 2602 scsi_transport_reserve_device(ahc_linux_transport_template,
2603 sizeof(struct ahc_linux_device));
dfd287f6 2604
dfd287f6
CH		 2605 ahc_linux_pci_init();
2606 ahc_linux_eisa_init();
2607 return 0;
1da177e4
LT		 2608}
2609
2610static void
2611ahc_linux_exit(void)
2612{
1da177e4
LT		 2613 ahc_linux_pci_exit();
2614 ahc_linux_eisa_exit();
92d161c3 2615 spi_release_transport(ahc_linux_transport_template);
1da177e4
LT		 2616}
2617
2618module_init(ahc_linux_init);
2619module_exit(ahc_linux_exit);
Linux 6.x block layer and io_uring tree(s)