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Documentation: remove references to /etc/modprobe.conf
[GitHub/mt8127/android_kernel_alcatel_ttab.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
JB		 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
JB		 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",
1da177e4
LT		 806 .proc_info = ahc_linux_proc_info,
807 .info = ahc_linux_info,
808 .queuecommand = ahc_linux_queue,
809 .eh_abort_handler = ahc_linux_abort,
810 .eh_device_reset_handler = ahc_linux_dev_reset,
811 .eh_bus_reset_handler = ahc_linux_bus_reset,
812#if defined(__i386__)
813 .bios_param = ahc_linux_biosparam,
814#endif
815 .can_queue = AHC_MAX_QUEUE,
816 .this_id = -1,
80f1443c 817 .max_sectors = 8192,
1da177e4
LT		 818 .cmd_per_lun = 2,
819 .use_clustering = ENABLE_CLUSTERING,
820 .slave_alloc = ahc_linux_slave_alloc,
821 .slave_configure = ahc_linux_slave_configure,
b1abb4d6
JB		 822 .target_alloc = ahc_linux_target_alloc,
823 .target_destroy = ahc_linux_target_destroy,
1da177e4
LT		 824};
825
826/**************************** Tasklet Handler *********************************/
827
1da177e4
LT		 828/******************************** Macros **************************************/
829#define BUILD_SCSIID(ahc, cmd) \
830 ((((cmd)->device->id << TID_SHIFT) & TID) \
831 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
832 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
833
834/******************************** Bus DMA *************************************/
835int
836ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
837 bus_size_t alignment, bus_size_t boundary,
838 dma_addr_t lowaddr, dma_addr_t highaddr,
839 bus_dma_filter_t *filter, void *filterarg,
840 bus_size_t maxsize, int nsegments,
841 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
842{
843 bus_dma_tag_t dmat;
844
48813cf9 845 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
1da177e4
LT		 846 if (dmat == NULL)
847 return (ENOMEM);
848
849 /*
850 * Linux is very simplistic about DMA memory. For now don't
851 * maintain all specification information. Once Linux supplies
852 * better facilities for doing these operations, or the
853 * needs of this particular driver change, we might need to do
854 * more here.
855 */
856 dmat->alignment = alignment;
857 dmat->boundary = boundary;
858 dmat->maxsize = maxsize;
859 *ret_tag = dmat;
860 return (0);
861}
862
863void
864ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
865{
48813cf9 866 kfree(dmat);
1da177e4
LT		 867}
868
869int
870ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
871 int flags, bus_dmamap_t *mapp)
872{
1da177e4 873 *vaddr = pci_alloc_consistent(ahc->dev_softc,
7dfa0f26 874 dmat->maxsize, mapp);
1da177e4 875 if (*vaddr == NULL)
7dfa0f26
CH		 876 return ENOMEM;
877 return 0;
1da177e4
LT		 878}
879
880void
881ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
882 void* vaddr, bus_dmamap_t map)
883{
884 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
7dfa0f26 885 vaddr, map);
1da177e4
LT		 886}
887
888int
889ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
890 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
891 void *cb_arg, int flags)
892{
893 /*
894 * Assume for now that this will only be used during
895 * initialization and not for per-transaction buffer mapping.
896 */
897 bus_dma_segment_t stack_sg;
898
7dfa0f26 899 stack_sg.ds_addr = map;
1da177e4
LT		 900 stack_sg.ds_len = dmat->maxsize;
901 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
902 return (0);
903}
904
905void
906ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
907{
1da177e4
LT		 908}
909
910int
911ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
912{
913 /* Nothing to do */
914 return (0);
915}
916
1da177e4
LT		 917static void
918ahc_linux_setup_tag_info_global(char *p)
919{
920 int tags, i, j;
921
922 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
48813cf9 923 printk("Setting Global Tags= %d\n", tags);
1da177e4 924
6391a113 925 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
1da177e4
LT		 926 for (j = 0; j < AHC_NUM_TARGETS; j++) {
927 aic7xxx_tag_info[i].tag_commands[j] = tags;
928 }
929 }
930}
931
932static void
933ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
934{
935
936 if ((instance >= 0) && (targ >= 0)
6391a113 937 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
1da177e4
LT		 938 && (targ < AHC_NUM_TARGETS)) {
939 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
940 if (bootverbose)
48813cf9 941 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1da177e4
LT		 942 }
943}
944
1ff92730
CH		 945static char *
946ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
947 void (*callback)(u_long, int, int, int32_t),
948 u_long callback_arg)
949{
950 char *tok_end;
951 char *tok_end2;
952 int i;
953 int instance;
954 int targ;
955 int done;
956 char tok_list[] = {'.', ',', '{', '}', '\0'};
957
958 /* All options use a ':' name/arg separator */
959 if (*opt_arg != ':')
960 return (opt_arg);
961 opt_arg++;
962 instance = -1;
963 targ = -1;
964 done = FALSE;
965 /*
966 * Restore separator that may be in
967 * the middle of our option argument.
968 */
969 tok_end = strchr(opt_arg, '\0');
970 if (tok_end < end)
971 *tok_end = ',';
972 while (!done) {
973 switch (*opt_arg) {
974 case '{':
975 if (instance == -1) {
976 instance = 0;
977 } else {
978 if (depth > 1) {
979 if (targ == -1)
980 targ = 0;
981 } else {
48813cf9 982 printk("Malformed Option %s\n",
1ff92730
CH		 983 opt_name);
984 done = TRUE;
985 }
986 }
987 opt_arg++;
988 break;
989 case '}':
990 if (targ != -1)
991 targ = -1;
992 else if (instance != -1)
993 instance = -1;
994 opt_arg++;
995 break;
996 case ',':
997 case '.':
998 if (instance == -1)
999 done = TRUE;
1000 else if (targ >= 0)
1001 targ++;
1002 else if (instance >= 0)
1003 instance++;
1004 opt_arg++;
1005 break;
1006 case '\0':
1007 done = TRUE;
1008 break;
1009 default:
1010 tok_end = end;
1011 for (i = 0; tok_list[i]; i++) {
1012 tok_end2 = strchr(opt_arg, tok_list[i]);
1013 if ((tok_end2) && (tok_end2 < tok_end))
1014 tok_end = tok_end2;
1015 }
1016 callback(callback_arg, instance, targ,
1017 simple_strtol(opt_arg, NULL, 0));
1018 opt_arg = tok_end;
1019 break;
1020 }
1021 }
1022 return (opt_arg);
1023}
1024
1da177e4
LT		 1025/*
1026 * Handle Linux boot parameters. This routine allows for assigning a value
1027 * to a parameter with a ':' between the parameter and the value.
1028 * ie. aic7xxx=stpwlev:1,extended
1029 */
1030static int
1031aic7xxx_setup(char *s)
1032{
1033 int i, n;
1034 char *p;
1035 char *end;
1036
980b306a 1037 static const struct {
1da177e4
LT		 1038 const char *name;
1039 uint32_t *flag;
1040 } options[] = {
1041 { "extended", &aic7xxx_extended },
1042 { "no_reset", &aic7xxx_no_reset },
1043 { "verbose", &aic7xxx_verbose },
1044 { "allow_memio", &aic7xxx_allow_memio},
1045#ifdef AHC_DEBUG
1046 { "debug", &ahc_debug },
1047#endif
1da177e4
LT		 1048 { "periodic_otag", &aic7xxx_periodic_otag },
1049 { "pci_parity", &aic7xxx_pci_parity },
1050 { "seltime", &aic7xxx_seltime },
1051 { "tag_info", NULL },
1052 { "global_tag_depth", NULL },
1053 { "dv", NULL }
1054 };
1055
1056 end = strchr(s, '\0');
1057
1058 /*
6391a113 1059 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1da177e4
LT		 1060 * will never be 0 in this case.
1061 */
1062 n = 0;
1063
1064 while ((p = strsep(&s, ",.")) != NULL) {
1065 if (*p == '\0')
1066 continue;
6391a113 1067 for (i = 0; i < ARRAY_SIZE(options); i++) {
1da177e4
LT		 1068
1069 n = strlen(options[i].name);
1070 if (strncmp(options[i].name, p, n) == 0)
1071 break;
1072 }
6391a113 1073 if (i == ARRAY_SIZE(options))
1da177e4
LT		 1074 continue;
1075
1076 if (strncmp(p, "global_tag_depth", n) == 0) {
1077 ahc_linux_setup_tag_info_global(p + n);
1078 } else if (strncmp(p, "tag_info", n) == 0) {
1ff92730 1079 s = ahc_parse_brace_option("tag_info", p + n, end,
1da177e4 1080 2, ahc_linux_setup_tag_info, 0);
1da177e4
LT		 1081 } else if (p[n] == ':') {
1082 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1083 } else if (strncmp(p, "verbose", n) == 0) {
1084 *(options[i].flag) = 1;
1085 } else {
1086 *(options[i].flag) ^= 0xFFFFFFFF;
1087 }
1088 }
1089 return 1;
1090}
1091
1092__setup("aic7xxx=", aic7xxx_setup);
1093
1094uint32_t aic7xxx_verbose;
1095
1096int
013791ee 1097ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1da177e4 1098{
9e1fe931
JJ		 1099 char buf[80];
1100 struct Scsi_Host *host;
1da177e4 1101 char *new_name;
9e1fe931
JJ		 1102 u_long s;
1103 int retval;
1da177e4
LT		 1104
1105 template->name = ahc->description;
1106 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1107 if (host == NULL)
1108 return (ENOMEM);
1109
1110 *((struct ahc_softc **)host->hostdata) = ahc;
1da177e4
LT		 1111 ahc->platform_data->host = host;
1112 host->can_queue = AHC_MAX_QUEUE;
1113 host->cmd_per_lun = 2;
1114 /* XXX No way to communicate the ID for multiple channels */
1115 host->this_id = ahc->our_id;
1116 host->irq = ahc->platform_data->irq;
1117 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1118 host->max_lun = AHC_NUM_LUNS;
1119 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1120 host->sg_tablesize = AHC_NSEG;
dacee84b 1121 ahc_lock(ahc, &s);
2a40342e 1122 ahc_set_unit(ahc, ahc_linux_unit++);
dacee84b 1123 ahc_unlock(ahc, &s);
1da177e4 1124 sprintf(buf, "scsi%d", host->host_no);
48813cf9 1125 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1da177e4
LT		 1126 if (new_name != NULL) {
1127 strcpy(new_name, buf);
1128 ahc_set_name(ahc, new_name);
1129 }
1130 host->unique_id = ahc->unit;
1da177e4 1131 ahc_linux_initialize_scsi_bus(ahc);
1da177e4 1132 ahc_intr_enable(ahc, TRUE);
1da177e4 1133
92d161c3
JB		 1134 host->transportt = ahc_linux_transport_template;
1135
9e1fe931
JJ		 1136 retval = scsi_add_host(host,
1137 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
1138 if (retval) {
1139 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1140 scsi_host_put(host);
1141 return retval;
1142 }
1143
1da177e4 1144 scsi_scan_host(host);
9e1fe931 1145 return 0;
1da177e4
LT		 1146}
1147
1da177e4
LT		 1148/*
1149 * Place the SCSI bus into a known state by either resetting it,
1150 * or forcing transfer negotiations on the next command to any
1151 * target.
1152 */
1153void
1154ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1155{
1156 int i;
1157 int numtarg;
dacee84b 1158 unsigned long s;
1da177e4
LT		 1159
1160 i = 0;
1161 numtarg = 0;
1162
dacee84b
JB		 1163 ahc_lock(ahc, &s);
1164
1da177e4
LT		 1165 if (aic7xxx_no_reset != 0)
1166 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1167
1168 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1169 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1170 else
1171 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1172
1173 if ((ahc->features & AHC_TWIN) != 0) {
1174
1175 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1176 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1177 } else {
1178 if (numtarg == 0)
1179 i = 8;
1180 numtarg += 8;
1181 }
1182 }
1183
1184 /*
1185 * Force negotiation to async for all targets that
1186 * will not see an initial bus reset.
1187 */
1188 for (; i < numtarg; i++) {
1189 struct ahc_devinfo devinfo;
1190 struct ahc_initiator_tinfo *tinfo;
1191 struct ahc_tmode_tstate *tstate;
1192 u_int our_id;
1193 u_int target_id;
1194 char channel;
1195
1196 channel = 'A';
1197 our_id = ahc->our_id;
1198 target_id = i;
1199 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1200 channel = 'B';
1201 our_id = ahc->our_id_b;
1202 target_id = i % 8;
1203 }
1204 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1205 target_id, &tstate);
1206 ahc_compile_devinfo(&devinfo, our_id, target_id,
1207 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1208 ahc_update_neg_request(ahc, &devinfo, tstate,
1209 tinfo, AHC_NEG_ALWAYS);
1210 }
dacee84b 1211 ahc_unlock(ahc, &s);
1da177e4
LT		 1212 /* Give the bus some time to recover */
1213 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1214 ahc_linux_freeze_simq(ahc);
dacee84b
JB		 1215 msleep(AIC7XXX_RESET_DELAY);
1216 ahc_linux_release_simq(ahc);
1da177e4
LT		 1217 }
1218}
1219
1220int
1221ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1222{
1223
1224 ahc->platform_data =
48813cf9 1225 kmalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
1da177e4
LT		 1226 if (ahc->platform_data == NULL)
1227 return (ENOMEM);
1228 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1da177e4 1229 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1da177e4 1230 ahc_lockinit(ahc);
1da177e4
LT		 1231 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1232 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1233 if (aic7xxx_pci_parity == 0)
1234 ahc->flags |= AHC_DISABLE_PCI_PERR;
1235
1236 return (0);
1237}
1238
1239void
1240ahc_platform_free(struct ahc_softc *ahc)
1241{
b1abb4d6 1242 struct scsi_target *starget;
9080063f 1243 int i;
1da177e4
LT		 1244
1245 if (ahc->platform_data != NULL) {
1da177e4
LT		 1246 /* destroy all of the device and target objects */
1247 for (i = 0; i < AHC_NUM_TARGETS; i++) {
b1abb4d6
JB		 1248 starget = ahc->platform_data->starget[i];
1249 if (starget != NULL) {
b1abb4d6 1250 ahc->platform_data->starget[i] = NULL;
1da177e4
LT		 1251 }
1252 }
1253
1254 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1255 free_irq(ahc->platform_data->irq, ahc);
1256 if (ahc->tag == BUS_SPACE_PIO
1257 && ahc->bsh.ioport != 0)
1258 release_region(ahc->bsh.ioport, 256);
1259 if (ahc->tag == BUS_SPACE_MEMIO
1260 && ahc->bsh.maddr != NULL) {
1261 iounmap(ahc->bsh.maddr);
1262 release_mem_region(ahc->platform_data->mem_busaddr,
1263 0x1000);
1264 }
dedd8310 1265
97af50f6
JB		 1266 if (ahc->platform_data->host)
1267 scsi_host_put(ahc->platform_data->host);
1268
48813cf9 1269 kfree(ahc->platform_data);
1da177e4
LT		 1270 }
1271}
1272
1273void
1274ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1275{
1276 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1277 SCB_GET_CHANNEL(ahc, scb),
1278 SCB_GET_LUN(scb), SCB_LIST_NULL,
1279 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1280}
1281
1282void
9080063f
HR		 1283ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1284 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1da177e4
LT		 1285{
1286 struct ahc_linux_device *dev;
1287 int was_queuing;
1288 int now_queuing;
1289
b1abb4d6 1290 if (sdev == NULL)
1da177e4 1291 return;
b1abb4d6
JB		 1292 dev = scsi_transport_device_data(sdev);
1293
1da177e4
LT		 1294 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1295 switch (alg) {
1296 default:
1297 case AHC_QUEUE_NONE:
1298 now_queuing = 0;
1299 break;
1300 case AHC_QUEUE_BASIC:
1301 now_queuing = AHC_DEV_Q_BASIC;
1302 break;
1303 case AHC_QUEUE_TAGGED:
1304 now_queuing = AHC_DEV_Q_TAGGED;
1305 break;
1306 }
1307 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1308 && (was_queuing != now_queuing)
1309 && (dev->active != 0)) {
1310 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1311 dev->qfrozen++;
1312 }
1313
1314 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1315 if (now_queuing) {
1316 u_int usertags;
1317
1318 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1319 if (!was_queuing) {
1320 /*
25985edc 1321 * Start out aggressively and allow our
1da177e4
LT		 1322 * dynamic queue depth algorithm to take
1323 * care of the rest.
1324 */
1325 dev->maxtags = usertags;
1326 dev->openings = dev->maxtags - dev->active;
1327 }
1328 if (dev->maxtags == 0) {
1329 /*
1330 * Queueing is disabled by the user.
1331 */
1332 dev->openings = 1;
1333 } else if (alg == AHC_QUEUE_TAGGED) {
1334 dev->flags |= AHC_DEV_Q_TAGGED;
1335 if (aic7xxx_periodic_otag != 0)
1336 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1337 } else
1338 dev->flags |= AHC_DEV_Q_BASIC;
1339 } else {
1340 /* We can only have one opening. */
1341 dev->maxtags = 0;
1342 dev->openings = 1 - dev->active;
1343 }
b1abb4d6
JB		 1344 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1345 case AHC_DEV_Q_BASIC:
fdd0edf2
JB		 1346 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
1347 scsi_activate_tcq(sdev, dev->openings + dev->active);
b1abb4d6
JB		 1348 break;
1349 case AHC_DEV_Q_TAGGED:
fdd0edf2
JB		 1350 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
1351 scsi_activate_tcq(sdev, dev->openings + dev->active);
b1abb4d6
JB		 1352 break;
1353 default:
1354 /*
1355 * We allow the OS to queue 2 untagged transactions to
1356 * us at any time even though we can only execute them
1357 * serially on the controller/device. This should
1358 * remove some latency.
1359 */
fdd0edf2 1360 scsi_deactivate_tcq(sdev, 2);
b1abb4d6 1361 break;
1da177e4 1362 }
1da177e4
LT		 1363}
1364
1365int
1366ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1367 int lun, u_int tag, role_t role, uint32_t status)
1368{
e4e360c3 1369 return 0;
1da177e4
LT		 1370}
1371
cb624029
JB		 1372static u_int
1373ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1da177e4 1374{
cb624029
JB		 1375 static int warned_user;
1376 u_int tags;
1da177e4 1377
cb624029
JB		 1378 tags = 0;
1379 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
6391a113 1380 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
cb624029 1381 if (warned_user == 0) {
1da177e4 1382
48813cf9 1383 printk(KERN_WARNING
cb624029
JB		 1384"aic7xxx: WARNING: Insufficient tag_info instances\n"
1385"aic7xxx: for installed controllers. Using defaults\n"
1386"aic7xxx: Please update the aic7xxx_tag_info array in\n"
1387"aic7xxx: the aic7xxx_osm..c source file.\n");
1388 warned_user++;
1389 }
1390 tags = AHC_MAX_QUEUE;
1391 } else {
1392 adapter_tag_info_t *tag_info;
1da177e4 1393
cb624029
JB		 1394 tag_info = &aic7xxx_tag_info[ahc->unit];
1395 tags = tag_info->tag_commands[devinfo->target_offset];
1396 if (tags > AHC_MAX_QUEUE)
1397 tags = AHC_MAX_QUEUE;
1398 }
1da177e4 1399 }
cb624029 1400 return (tags);
1da177e4
LT		 1401}
1402
cb624029
JB		 1403/*
1404 * Determines the queue depth for a given device.
1405 */
1da177e4 1406static void
b1abb4d6 1407ahc_linux_device_queue_depth(struct scsi_device *sdev)
1da177e4 1408{
cb624029
JB		 1409 struct ahc_devinfo devinfo;
1410 u_int tags;
b1abb4d6 1411 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1da177e4 1412
cb624029 1413 ahc_compile_devinfo(&devinfo,
b1abb4d6 1414 sdev->sdev_target->channel == 0
cb624029 1415 ? ahc->our_id : ahc->our_id_b,
b1abb4d6
JB		 1416 sdev->sdev_target->id, sdev->lun,
1417 sdev->sdev_target->channel == 0 ? 'A' : 'B',
cb624029
JB		 1418 ROLE_INITIATOR);
1419 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
b1abb4d6 1420 if (tags != 0 && sdev->tagged_supported != 0) {
1da177e4 1421
9080063f
HR		 1422 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1423 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1424 devinfo.lun, AC_TRANSFER_NEG);
cb624029 1425 ahc_print_devinfo(ahc, &devinfo);
48813cf9 1426 printk("Tagged Queuing enabled. Depth %d\n", tags);
1da177e4 1427 } else {
9080063f
HR		 1428 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1429 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1430 devinfo.lun, AC_TRANSFER_NEG);
1da177e4
LT		 1431 }
1432}
1433
e4e360c3
JB		 1434static int
1435ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1436 struct scsi_cmnd *cmd)
1da177e4 1437{
cb624029
JB		 1438 struct scb *scb;
1439 struct hardware_scb *hscb;
1440 struct ahc_initiator_tinfo *tinfo;
1441 struct ahc_tmode_tstate *tstate;
1442 uint16_t mask;
e4e360c3 1443 struct scb_tailq *untagged_q = NULL;
3a57c4a5 1444 int nseg;
1da177e4 1445
e4e360c3
JB		 1446 /*
1447 * Schedule us to run later. The only reason we are not
1448 * running is because the whole controller Q is frozen.
1449 */
1450 if (ahc->platform_data->qfrozen != 0)
1451 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1452
e4e360c3
JB		 1453 /*
1454 * We only allow one untagged transaction
1455 * per target in the initiator role unless
1456 * we are storing a full busy target *lun*
1457 * table in SCB space.
1458 */
1459 if (!blk_rq_tagged(cmd->request)
1460 && (ahc->features & AHC_SCB_BTT) == 0) {
1461 int target_offset;
1da177e4 1462
e4e360c3
JB		 1463 target_offset = cmd->device->id + cmd->device->channel * 8;
1464 untagged_q = &(ahc->untagged_queues[target_offset]);
1465 if (!TAILQ_EMPTY(untagged_q))
1466 /* if we're already executing an untagged command
1467 * we're busy to another */
1468 return SCSI_MLQUEUE_DEVICE_BUSY;
1469 }
1470
647b2425
FT		 1471 nseg = scsi_dma_map(cmd);
1472 if (nseg < 0)
1473 return SCSI_MLQUEUE_HOST_BUSY;
1474
e4e360c3
JB		 1475 /*
1476 * Get an scb to use.
1477 */
8eb37942 1478 scb = ahc_get_scb(ahc);
647b2425
FT		 1479 if (!scb) {
1480 scsi_dma_unmap(cmd);
8eb37942 1481 return SCSI_MLQUEUE_HOST_BUSY;
647b2425 1482 }
1da177e4 1483
e4e360c3
JB		 1484 scb->io_ctx = cmd;
1485 scb->platform_data->dev = dev;
1486 hscb = scb->hscb;
1487 cmd->host_scribble = (char *)scb;
1da177e4 1488
e4e360c3
JB		 1489 /*
1490 * Fill out basics of the HSCB.
1491 */
1492 hscb->control = 0;
1493 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1494 hscb->lun = cmd->device->lun;
1495 mask = SCB_GET_TARGET_MASK(ahc, scb);
1496 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1497 SCB_GET_OUR_ID(scb),
1498 SCB_GET_TARGET(ahc, scb), &tstate);
1499 hscb->scsirate = tinfo->scsirate;
1500 hscb->scsioffset = tinfo->curr.offset;
1501 if ((tstate->ultraenb & mask) != 0)
1502 hscb->control |= ULTRAENB;
1503
1504 if ((ahc->user_discenable & mask) != 0)
1505 hscb->control |= DISCENB;
1506
1507 if ((tstate->auto_negotiate & mask) != 0) {
1508 scb->flags |= SCB_AUTO_NEGOTIATE;
1509 scb->hscb->control |= MK_MESSAGE;
1510 }
1511
1512 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
e4e360c3
JB		 1513 int msg_bytes;
1514 uint8_t tag_msgs[2];
1515
1516 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1517 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1518 hscb->control |= tag_msgs[0];
1519 if (tag_msgs[0] == MSG_ORDERED_TASK)
cb624029 1520 dev->commands_since_idle_or_otag = 0;
dedd8310
CH		 1521 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1522 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
e4e360c3
JB		 1523 hscb->control |= MSG_ORDERED_TASK;
1524 dev->commands_since_idle_or_otag = 0;
cb624029 1525 } else {
e4e360c3 1526 hscb->control |= MSG_SIMPLE_TASK;
cb624029 1527 }
e4e360c3 1528 }
1da177e4 1529
e4e360c3
JB		 1530 hscb->cdb_len = cmd->cmd_len;
1531 if (hscb->cdb_len <= 12) {
1532 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1533 } else {
1534 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1535 scb->flags |= SCB_CDB32_PTR;
1536 }
1da177e4 1537
e4e360c3
JB		 1538 scb->platform_data->xfer_len = 0;
1539 ahc_set_residual(scb, 0);
1540 ahc_set_sense_residual(scb, 0);
1541 scb->sg_count = 0;
3a57c4a5 1542
3a57c4a5 1543 if (nseg > 0) {
e4e360c3
JB		 1544 struct ahc_dma_seg *sg;
1545 struct scatterlist *cur_seg;
3a57c4a5 1546 int i;
e4e360c3 1547
e4e360c3
JB		 1548 /* Copy the segments into the SG list. */
1549 sg = scb->sg_list;
1550 /*
1551 * The sg_count may be larger than nseg if
1552 * a transfer crosses a 32bit page.
3a57c4a5
FT		 1553 */
1554 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1da177e4 1555 dma_addr_t addr;
e4e360c3
JB		 1556 bus_size_t len;
1557 int consumed;
1558
1559 addr = sg_dma_address(cur_seg);
1560 len = sg_dma_len(cur_seg);
1561 consumed = ahc_linux_map_seg(ahc, scb,
1562 sg, addr, len);
1563 sg += consumed;
1564 scb->sg_count += consumed;
1da177e4 1565 }
e4e360c3
JB		 1566 sg--;
1567 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4 1568
e4e360c3
JB		 1569 /*
1570 * Reset the sg list pointer.
1571 */
1572 scb->hscb->sgptr =
1573 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1574
1575 /*
1576 * Copy the first SG into the "current"
1577 * data pointer area.
1578 */
1579 scb->hscb->dataptr = scb->sg_list->addr;
1580 scb->hscb->datacnt = scb->sg_list->len;
e4e360c3
JB		 1581 } else {
1582 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1583 scb->hscb->dataptr = 0;
1584 scb->hscb->datacnt = 0;
1585 scb->sg_count = 0;
1586 }
1587
1588 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1589 dev->openings--;
1590 dev->active++;
1591 dev->commands_issued++;
1592 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1593 dev->commands_since_idle_or_otag++;
1594
1595 scb->flags |= SCB_ACTIVE;
1596 if (untagged_q) {
1597 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1598 scb->flags |= SCB_UNTAGGEDQ;
1da177e4 1599 }
e4e360c3
JB		 1600 ahc_queue_scb(ahc, scb);
1601 return 0;
1da177e4
LT		 1602}
1603
1604/*
1605 * SCSI controller interrupt handler.
1606 */
1607irqreturn_t
7d12e780 1608ahc_linux_isr(int irq, void *dev_id)
1da177e4
LT		 1609{
1610 struct ahc_softc *ahc;
1611 u_long flags;
1612 int ours;
1613
1614 ahc = (struct ahc_softc *) dev_id;
1615 ahc_lock(ahc, &flags);
1616 ours = ahc_intr(ahc);
1da177e4
LT		 1617 ahc_unlock(ahc, &flags);
1618 return IRQ_RETVAL(ours);
1619}
1620
1621void
1622ahc_platform_flushwork(struct ahc_softc *ahc)
1623{
1624
1da177e4
LT		 1625}
1626
1da177e4
LT		 1627void
1628ahc_send_async(struct ahc_softc *ahc, char channel,
9080063f 1629 u_int target, u_int lun, ac_code code)
1da177e4
LT		 1630{
1631 switch (code) {
1632 case AC_TRANSFER_NEG:
1633 {
1634 char buf[80];
b1abb4d6 1635 struct scsi_target *starget;
1da177e4
LT		 1636 struct ahc_linux_target *targ;
1637 struct info_str info;
1638 struct ahc_initiator_tinfo *tinfo;
1639 struct ahc_tmode_tstate *tstate;
1640 int target_offset;
b1abb4d6
JB		 1641 unsigned int target_ppr_options;
1642
1643 BUG_ON(target == CAM_TARGET_WILDCARD);
1da177e4
LT		 1644
1645 info.buffer = buf;
1646 info.length = sizeof(buf);
1647 info.offset = 0;
1648 info.pos = 0;
1649 tinfo = ahc_fetch_transinfo(ahc, channel,
1650 channel == 'A' ? ahc->our_id
1651 : ahc->our_id_b,
1652 target, &tstate);
1653
1654 /*
1655 * Don't bother reporting results while
1656 * negotiations are still pending.
1657 */
1658 if (tinfo->curr.period != tinfo->goal.period
1659 || tinfo->curr.width != tinfo->goal.width
1660 || tinfo->curr.offset != tinfo->goal.offset
1661 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1662 if (bootverbose == 0)
1663 break;
1664
1665 /*
1666 * Don't bother reporting results that
1667 * are identical to those last reported.
1668 */
1669 target_offset = target;
1670 if (channel == 'B')
1671 target_offset += 8;
b1abb4d6 1672 starget = ahc->platform_data->starget[target_offset];
fc789a93 1673 if (starget == NULL)
1da177e4 1674 break;
fc789a93 1675 targ = scsi_transport_target_data(starget);
b1abb4d6
JB		 1676
1677 target_ppr_options =
1678 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1679 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1680 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1681
1682 if (tinfo->curr.period == spi_period(starget)
1683 && tinfo->curr.width == spi_width(starget)
1684 && tinfo->curr.offset == spi_offset(starget)
1685 && tinfo->curr.ppr_options == target_ppr_options)
1da177e4
LT		 1686 if (bootverbose == 0)
1687 break;
1688
b1abb4d6
JB		 1689 spi_period(starget) = tinfo->curr.period;
1690 spi_width(starget) = tinfo->curr.width;
1691 spi_offset(starget) = tinfo->curr.offset;
f7ff898a
JB		 1692 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1693 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1694 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
b1abb4d6 1695 spi_display_xfer_agreement(starget);
1da177e4
LT		 1696 break;
1697 }
1698 case AC_SENT_BDR:
1699 {
1da177e4
LT		 1700 WARN_ON(lun != CAM_LUN_WILDCARD);
1701 scsi_report_device_reset(ahc->platform_data->host,
1702 channel - 'A', target);
1da177e4
LT		 1703 break;
1704 }
1705 case AC_BUS_RESET:
1706 if (ahc->platform_data->host != NULL) {
1707 scsi_report_bus_reset(ahc->platform_data->host,
1708 channel - 'A');
1709 }
1710 break;
1711 default:
1712 panic("ahc_send_async: Unexpected async event");
1713 }
1714}
1715
1716/*
1717 * Calls the higher level scsi done function and frees the scb.
1718 */
1719void
1720ahc_done(struct ahc_softc *ahc, struct scb *scb)
1721{
013791ee 1722 struct scsi_cmnd *cmd;
1da177e4
LT		 1723 struct ahc_linux_device *dev;
1724
1725 LIST_REMOVE(scb, pending_links);
1726 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1727 struct scb_tailq *untagged_q;
1728 int target_offset;
1729
1730 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1731 untagged_q = &(ahc->untagged_queues[target_offset]);
1732 TAILQ_REMOVE(untagged_q, scb, links.tqe);
e4e360c3 1733 BUG_ON(!TAILQ_EMPTY(untagged_q));
969ceffb
DM		 1734 } else if ((scb->flags & SCB_ACTIVE) == 0) {
1735 /*
1736 * Transactions aborted from the untagged queue may
1737 * not have been dispatched to the controller, so
1738 * only check the SCB_ACTIVE flag for tagged transactions.
1739 */
48813cf9 1740 printk("SCB %d done'd twice\n", scb->hscb->tag);
1da177e4
LT		 1741 ahc_dump_card_state(ahc);
1742 panic("Stopping for safety");
1743 }
1744 cmd = scb->io_ctx;
1745 dev = scb->platform_data->dev;
1746 dev->active--;
1747 dev->openings++;
1748 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1749 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1750 dev->qfrozen--;
1751 }
1752 ahc_linux_unmap_scb(ahc, scb);
1753
1754 /*
1755 * Guard against stale sense data.
1756 * The Linux mid-layer assumes that sense
1757 * was retrieved anytime the first byte of
1758 * the sense buffer looks "sane".
1759 */
1760 cmd->sense_buffer[0] = 0;
1761 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1762 uint32_t amount_xferred;
1763
1764 amount_xferred =
1765 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1766 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1767#ifdef AHC_DEBUG
1768 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1769 ahc_print_path(ahc, scb);
48813cf9 1770 printk("Set CAM_UNCOR_PARITY\n");
1da177e4
LT		 1771 }
1772#endif
1773 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1774#ifdef AHC_REPORT_UNDERFLOWS
1775 /*
1776 * This code is disabled by default as some
1777 * clients of the SCSI system do not properly
1778 * initialize the underflow parameter. This
1779 * results in spurious termination of commands
1780 * that complete as expected (e.g. underflow is
1781 * allowed as command can return variable amounts
1782 * of data.
1783 */
1784 } else if (amount_xferred < scb->io_ctx->underflow) {
1785 u_int i;
1786
1787 ahc_print_path(ahc, scb);
48813cf9 1788 printk("CDB:");
1da177e4 1789 for (i = 0; i < scb->io_ctx->cmd_len; i++)
48813cf9
PE		 1790 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1791 printk("\n");
1da177e4 1792 ahc_print_path(ahc, scb);
48813cf9 1793 printk("Saw underflow (%ld of %ld bytes). "
1da177e4
LT		 1794 "Treated as error\n",
1795 ahc_get_residual(scb),
1796 ahc_get_transfer_length(scb));
1797 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1798#endif
1799 } else {
1800 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1801 }
1802 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
b1abb4d6 1803 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1da177e4 1804 }
1da177e4
LT		 1805
1806 if (dev->openings == 1
1807 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1808 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1809 dev->tag_success_count++;
1810 /*
1811 * Some devices deal with temporary internal resource
1812 * shortages by returning queue full. When the queue
1813 * full occurrs, we throttle back. Slowly try to get
1814 * back to our previous queue depth.
1815 */
1816 if ((dev->openings + dev->active) < dev->maxtags
1817 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1818 dev->tag_success_count = 0;
1819 dev->openings++;
1820 }
1821
1822 if (dev->active == 0)
1823 dev->commands_since_idle_or_otag = 0;
1824
1da177e4 1825 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
48813cf9 1826 printk("Recovery SCB completes\n");
1da177e4
LT		 1827 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1828 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1829 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
8cac8145
CH		 1830
1831 if (ahc->platform_data->eh_done)
1832 complete(ahc->platform_data->eh_done);
1da177e4
LT		 1833 }
1834
1835 ahc_free_scb(ahc, scb);
1836 ahc_linux_queue_cmd_complete(ahc, cmd);
1da177e4
LT		 1837}
1838
1839static void
1840ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
b1abb4d6 1841 struct scsi_device *sdev, struct scb *scb)
1da177e4
LT		 1842{
1843 struct ahc_devinfo devinfo;
b1abb4d6 1844 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1da177e4
LT		 1845
1846 ahc_compile_devinfo(&devinfo,
1847 ahc->our_id,
b1abb4d6
JB		 1848 sdev->sdev_target->id, sdev->lun,
1849 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1da177e4
LT		 1850 ROLE_INITIATOR);
1851
1852 /*
1853 * We don't currently trust the mid-layer to
1854 * properly deal with queue full or busy. So,
1855 * when one occurs, we tell the mid-layer to
1856 * unconditionally requeue the command to us
1857 * so that we can retry it ourselves. We also
1858 * implement our own throttling mechanism so
1859 * we don't clobber the device with too many
1860 * commands.
1861 */
1862 switch (ahc_get_scsi_status(scb)) {
1863 default:
1864 break;
1865 case SCSI_STATUS_CHECK_COND:
1866 case SCSI_STATUS_CMD_TERMINATED:
1867 {
013791ee 1868 struct scsi_cmnd *cmd;
1da177e4
LT		 1869
1870 /*
1871 * Copy sense information to the OS's cmd
1872 * structure if it is available.
1873 */
1874 cmd = scb->io_ctx;
1875 if (scb->flags & SCB_SENSE) {
1876 u_int sense_size;
1877
6d07cb71 1878 sense_size = min(sizeof(struct scsi_sense_data)
1da177e4 1879 - ahc_get_sense_residual(scb),
b80ca4f7 1880 (u_long)SCSI_SENSE_BUFFERSIZE);
1da177e4
LT		 1881 memcpy(cmd->sense_buffer,
1882 ahc_get_sense_buf(ahc, scb), sense_size);
b80ca4f7 1883 if (sense_size < SCSI_SENSE_BUFFERSIZE)
1da177e4 1884 memset(&cmd->sense_buffer[sense_size], 0,
b80ca4f7 1885 SCSI_SENSE_BUFFERSIZE - sense_size);
1da177e4
LT		 1886 cmd->result |= (DRIVER_SENSE << 24);
1887#ifdef AHC_DEBUG
1888 if (ahc_debug & AHC_SHOW_SENSE) {
1889 int i;
1890
48813cf9 1891 printk("Copied %d bytes of sense data:",
1da177e4
LT		 1892 sense_size);
1893 for (i = 0; i < sense_size; i++) {
1894 if ((i & 0xF) == 0)
48813cf9
PE		 1895 printk("\n");
1896 printk("0x%x ", cmd->sense_buffer[i]);
1da177e4 1897 }
48813cf9 1898 printk("\n");
1da177e4
LT		 1899 }
1900#endif
1901 }
1902 break;
1903 }
1904 case SCSI_STATUS_QUEUE_FULL:
1905 {
1906 /*
1907 * By the time the core driver has returned this
1908 * command, all other commands that were queued
1909 * to us but not the device have been returned.
1910 * This ensures that dev->active is equal to
1911 * the number of commands actually queued to
1912 * the device.
1913 */
1914 dev->tag_success_count = 0;
1915 if (dev->active != 0) {
1916 /*
1917 * Drop our opening count to the number
1918 * of commands currently outstanding.
1919 */
1920 dev->openings = 0;
1921/*
1922 ahc_print_path(ahc, scb);
48813cf9 1923 printk("Dropping tag count to %d\n", dev->active);
1da177e4
LT		 1924 */
1925 if (dev->active == dev->tags_on_last_queuefull) {
1926
1927 dev->last_queuefull_same_count++;
1928 /*
1929 * If we repeatedly see a queue full
1930 * at the same queue depth, this
1931 * device has a fixed number of tag
1932 * slots. Lock in this tag depth
1933 * so we stop seeing queue fulls from
1934 * this device.
1935 */
1936 if (dev->last_queuefull_same_count
1937 == AHC_LOCK_TAGS_COUNT) {
1938 dev->maxtags = dev->active;
1939 ahc_print_path(ahc, scb);
48813cf9 1940 printk("Locking max tag count at %d\n",
1da177e4
LT		 1941 dev->active);
1942 }
1943 } else {
1944 dev->tags_on_last_queuefull = dev->active;
1945 dev->last_queuefull_same_count = 0;
1946 }
1947 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1948 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
9080063f 1949 ahc_platform_set_tags(ahc, sdev, &devinfo,
1da177e4
LT		 1950 (dev->flags & AHC_DEV_Q_BASIC)
1951 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1952 break;
1953 }
1954 /*
1955 * Drop down to a single opening, and treat this
1956 * as if the target returned BUSY SCSI status.
1957 */
1958 dev->openings = 1;
1959 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
9080063f 1960 ahc_platform_set_tags(ahc, sdev, &devinfo,
1da177e4
LT		 1961 (dev->flags & AHC_DEV_Q_BASIC)
1962 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1da177e4
LT		 1963 break;
1964 }
1965 }
1966}
1967
1968static void
013791ee 1969ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1da177e4 1970{
1da177e4
LT		 1971 /*
1972 * Map CAM error codes into Linux Error codes. We
1973 * avoid the conversion so that the DV code has the
1974 * full error information available when making
1975 * state change decisions.
1976 */
cb624029 1977 {
1da177e4
LT		 1978 u_int new_status;
1979
1980 switch (ahc_cmd_get_transaction_status(cmd)) {
1981 case CAM_REQ_INPROG:
1982 case CAM_REQ_CMP:
1983 case CAM_SCSI_STATUS_ERROR:
1984 new_status = DID_OK;
1985 break;
1986 case CAM_REQ_ABORTED:
1987 new_status = DID_ABORT;
1988 break;
1989 case CAM_BUSY:
1990 new_status = DID_BUS_BUSY;
1991 break;
1992 case CAM_REQ_INVALID:
1993 case CAM_PATH_INVALID:
1994 new_status = DID_BAD_TARGET;
1995 break;
1996 case CAM_SEL_TIMEOUT:
1997 new_status = DID_NO_CONNECT;
1998 break;
1999 case CAM_SCSI_BUS_RESET:
2000 case CAM_BDR_SENT:
2001 new_status = DID_RESET;
2002 break;
2003 case CAM_UNCOR_PARITY:
2004 new_status = DID_PARITY;
2005 break;
2006 case CAM_CMD_TIMEOUT:
2007 new_status = DID_TIME_OUT;
2008 break;
2009 case CAM_UA_ABORT:
2010 case CAM_REQ_CMP_ERR:
2011 case CAM_AUTOSENSE_FAIL:
2012 case CAM_NO_HBA:
2013 case CAM_DATA_RUN_ERR:
2014 case CAM_UNEXP_BUSFREE:
2015 case CAM_SEQUENCE_FAIL:
2016 case CAM_CCB_LEN_ERR:
2017 case CAM_PROVIDE_FAIL:
2018 case CAM_REQ_TERMIO:
2019 case CAM_UNREC_HBA_ERROR:
2020 case CAM_REQ_TOO_BIG:
2021 new_status = DID_ERROR;
2022 break;
2023 case CAM_REQUEUE_REQ:
8e45ebcc 2024 new_status = DID_REQUEUE;
1da177e4
LT		 2025 break;
2026 default:
2027 /* We should never get here */
2028 new_status = DID_ERROR;
2029 break;
2030 }
2031
2032 ahc_cmd_set_transaction_status(cmd, new_status);
2033 }
2034
8e45ebcc 2035 cmd->scsi_done(cmd);
1da177e4
LT		 2036}
2037
1da177e4
LT		 2038static void
2039ahc_linux_freeze_simq(struct ahc_softc *ahc)
2040{
dacee84b
JB		 2041 unsigned long s;
2042
2043 ahc_lock(ahc, &s);
1da177e4
LT		 2044 ahc->platform_data->qfrozen++;
2045 if (ahc->platform_data->qfrozen == 1) {
2046 scsi_block_requests(ahc->platform_data->host);
2047
2048 /* XXX What about Twin channels? */
2049 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2050 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2051 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2052 }
dacee84b 2053 ahc_unlock(ahc, &s);
1da177e4
LT		 2054}
2055
2056static void
dacee84b 2057ahc_linux_release_simq(struct ahc_softc *ahc)
1da177e4 2058{
1da177e4
LT		 2059 u_long s;
2060 int unblock_reqs;
2061
1da177e4
LT		 2062 unblock_reqs = 0;
2063 ahc_lock(ahc, &s);
2064 if (ahc->platform_data->qfrozen > 0)
2065 ahc->platform_data->qfrozen--;
2066 if (ahc->platform_data->qfrozen == 0)
2067 unblock_reqs = 1;
1da177e4
LT		 2068 ahc_unlock(ahc, &s);
2069 /*
2070 * There is still a race here. The mid-layer
2071 * should keep its own freeze count and use
2072 * a bottom half handler to run the queues
2073 * so we can unblock with our own lock held.
2074 */
2075 if (unblock_reqs)
2076 scsi_unblock_requests(ahc->platform_data->host);
2077}
2078
1da177e4 2079static int
013791ee 2080ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
1da177e4
LT		 2081{
2082 struct ahc_softc *ahc;
1da177e4
LT		 2083 struct ahc_linux_device *dev;
2084 struct scb *pending_scb;
1da177e4
LT		 2085 u_int saved_scbptr;
2086 u_int active_scb_index;
2087 u_int last_phase;
2088 u_int saved_scsiid;
2089 u_int cdb_byte;
2090 int retval;
2091 int was_paused;
2092 int paused;
2093 int wait;
2094 int disconnected;
6d5e9fd1 2095 unsigned long flags;
1da177e4
LT		 2096
2097 pending_scb = NULL;
2098 paused = FALSE;
2099 wait = FALSE;
2100 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
1da177e4 2101
017560fc 2102 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
1da177e4
LT		 2103 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2104
48813cf9 2105 printk("CDB:");
1da177e4 2106 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
48813cf9
PE		 2107 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2108 printk("\n");
1da177e4 2109
6d5e9fd1 2110 ahc_lock(ahc, &flags);
8fa728a2 2111
1da177e4
LT		 2112 /*
2113 * First determine if we currently own this command.
2114 * Start by searching the device queue. If not found
2115 * there, check the pending_scb list. If not found
2116 * at all, and the system wanted us to just abort the
2117 * command, return success.
2118 */
b1abb4d6 2119 dev = scsi_transport_device_data(cmd->device);
1da177e4
LT		 2120
2121 if (dev == NULL) {
2122 /*
2123 * No target device for this command exists,
2124 * so we must not still own the command.
2125 */
48813cf9 2126 printk("%s:%d:%d:%d: Is not an active device\n",
1da177e4
LT		 2127 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2128 cmd->device->lun);
2129 retval = SUCCESS;
2130 goto no_cmd;
2131 }
2132
1da177e4
LT		 2133 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2134 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2135 cmd->device->channel + 'A',
2136 cmd->device->lun,
2137 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
48813cf9 2138 printk("%s:%d:%d:%d: Command found on untagged queue\n",
1da177e4
LT		 2139 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2140 cmd->device->lun);
2141 retval = SUCCESS;
2142 goto done;
2143 }
2144
2145 /*
2146 * See if we can find a matching cmd in the pending list.
2147 */
2148 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2149 if (pending_scb->io_ctx == cmd)
2150 break;
2151 }
2152
2153 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2154
2155 /* Any SCB for this device will do for a target reset */
2156 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
422c0d61
JG		 2157 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2158 scmd_channel(cmd) + 'A',
1da177e4 2159 CAM_LUN_WILDCARD,
dce20067 2160 SCB_LIST_NULL, ROLE_INITIATOR))
1da177e4
LT		 2161 break;
2162 }
2163 }
2164
2165 if (pending_scb == NULL) {
017560fc 2166 scmd_printk(KERN_INFO, cmd, "Command not found\n");
1da177e4
LT		 2167 goto no_cmd;
2168 }
2169
2170 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2171 /*
2172 * We can't queue two recovery actions using the same SCB
2173 */
2174 retval = FAILED;
2175 goto done;
2176 }
2177
2178 /*
2179 * Ensure that the card doesn't do anything
2180 * behind our back and that we didn't "just" miss
2181 * an interrupt that would affect this cmd.
2182 */
2183 was_paused = ahc_is_paused(ahc);
2184 ahc_pause_and_flushwork(ahc);
2185 paused = TRUE;
2186
2187 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
017560fc 2188 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
1da177e4
LT		 2189 goto no_cmd;
2190 }
2191
48813cf9 2192 printk("%s: At time of recovery, card was %spaused\n",
1da177e4
LT		 2193 ahc_name(ahc), was_paused ? "" : "not ");
2194 ahc_dump_card_state(ahc);
2195
2196 disconnected = TRUE;
2197 if (flag == SCB_ABORT) {
2198 if (ahc_search_qinfifo(ahc, cmd->device->id,
2199 cmd->device->channel + 'A',
2200 cmd->device->lun,
2201 pending_scb->hscb->tag,
2202 ROLE_INITIATOR, CAM_REQ_ABORTED,
2203 SEARCH_COMPLETE) > 0) {
48813cf9 2204 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
1da177e4
LT		 2205 ahc_name(ahc), cmd->device->channel,
2206 cmd->device->id, cmd->device->lun);
2207 retval = SUCCESS;
2208 goto done;
2209 }
2210 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2211 cmd->device->channel + 'A',
2212 cmd->device->lun, pending_scb->hscb->tag,
2213 ROLE_INITIATOR, /*status*/0,
2214 SEARCH_COUNT) > 0) {
2215 disconnected = FALSE;
2216 }
2217
2218 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2219 struct scb *bus_scb;
2220
2221 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2222 if (bus_scb == pending_scb)
2223 disconnected = FALSE;
2224 else if (flag != SCB_ABORT
2225 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2226 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2227 disconnected = FALSE;
2228 }
2229
2230 /*
2231 * At this point, pending_scb is the scb associated with the
2232 * passed in command. That command is currently active on the
2233 * bus, is in the disconnected state, or we're hoping to find
2234 * a command for the same target active on the bus to abuse to
2235 * send a BDR. Queue the appropriate message based on which of
2236 * these states we are in.
2237 */
2238 last_phase = ahc_inb(ahc, LASTPHASE);
2239 saved_scbptr = ahc_inb(ahc, SCBPTR);
2240 active_scb_index = ahc_inb(ahc, SCB_TAG);
2241 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2242 if (last_phase != P_BUSFREE
2243 && (pending_scb->hscb->tag == active_scb_index
2244 || (flag == SCB_DEVICE_RESET
422c0d61 2245 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
1da177e4
LT		 2246
2247 /*
2248 * We're active on the bus, so assert ATN
2249 * and hope that the target responds.
2250 */
2251 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2252 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2253 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2254 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
017560fc 2255 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
1da177e4
LT		 2256 wait = TRUE;
2257 } else if (disconnected) {
2258
2259 /*
2260 * Actually re-queue this SCB in an attempt
2261 * to select the device before it reconnects.
2262 * In either case (selection or reselection),
2263 * we will now issue the approprate message
2264 * to the timed-out device.
2265 *
2266 * Set the MK_MESSAGE control bit indicating
2267 * that we desire to send a message. We
2268 * also set the disconnected flag since
2269 * in the paging case there is no guarantee
2270 * that our SCB control byte matches the
2271 * version on the card. We don't want the
2272 * sequencer to abort the command thinking
2273 * an unsolicited reselection occurred.
2274 */
2275 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2276 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2277
2278 /*
2279 * Remove any cached copy of this SCB in the
2280 * disconnected list in preparation for the
2281 * queuing of our abort SCB. We use the
2282 * same element in the SCB, SCB_NEXT, for
2283 * both the qinfifo and the disconnected list.
2284 */
2285 ahc_search_disc_list(ahc, cmd->device->id,
2286 cmd->device->channel + 'A',
2287 cmd->device->lun, pending_scb->hscb->tag,
2288 /*stop_on_first*/TRUE,
2289 /*remove*/TRUE,
2290 /*save_state*/FALSE);
2291
2292 /*
2293 * In the non-paging case, the sequencer will
2294 * never re-reference the in-core SCB.
2295 * To make sure we are notified during
b71a8eb0 2296 * reselection, set the MK_MESSAGE flag in
1da177e4
LT		 2297 * the card's copy of the SCB.
2298 */
2299 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2300 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2301 ahc_outb(ahc, SCB_CONTROL,
2302 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2303 }
2304
2305 /*
2306 * Clear out any entries in the QINFIFO first
2307 * so we are the next SCB for this target
2308 * to run.
2309 */
2310 ahc_search_qinfifo(ahc, cmd->device->id,
2311 cmd->device->channel + 'A',
2312 cmd->device->lun, SCB_LIST_NULL,
2313 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2314 SEARCH_COMPLETE);
2315 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2316 ahc_outb(ahc, SCBPTR, saved_scbptr);
2317 ahc_print_path(ahc, pending_scb);
48813cf9 2318 printk("Device is disconnected, re-queuing SCB\n");
1da177e4
LT		 2319 wait = TRUE;
2320 } else {
017560fc 2321 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
1da177e4
LT		 2322 retval = FAILED;
2323 goto done;
2324 }
2325
2326no_cmd:
2327 /*
2328 * Our assumption is that if we don't have the command, no
2329 * recovery action was required, so we return success. Again,
2330 * the semantics of the mid-layer recovery engine are not
2331 * well defined, so this may change in time.
2332 */
2333 retval = SUCCESS;
2334done:
2335 if (paused)
2336 ahc_unpause(ahc);
2337 if (wait) {
6e9a4738 2338 DECLARE_COMPLETION_ONSTACK(done);
1da177e4 2339
8cac8145 2340 ahc->platform_data->eh_done = &done;
6d5e9fd1
CH		 2341 ahc_unlock(ahc, &flags);
2342
48813cf9 2343 printk("Recovery code sleeping\n");
8cac8145
CH		 2344 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2345 ahc_lock(ahc, &flags);
2346 ahc->platform_data->eh_done = NULL;
2347 ahc_unlock(ahc, &flags);
2348
48813cf9 2349 printk("Timer Expired\n");
1da177e4
LT		 2350 retval = FAILED;
2351 }
48813cf9 2352 printk("Recovery code awake\n");
6d5e9fd1
CH		 2353 } else
2354 ahc_unlock(ahc, &flags);
1da177e4
LT		 2355 return (retval);
2356}
2357
2358void
2359ahc_platform_dump_card_state(struct ahc_softc *ahc)
2360{
1da177e4
LT		 2361}
2362
fad01ef8
JB		 2363static void ahc_linux_set_width(struct scsi_target *starget, int width)
2364{
2365 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2366 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2367 struct ahc_devinfo devinfo;
2368 unsigned long flags;
2369
2370 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2371 starget->channel + 'A', ROLE_INITIATOR);
2372 ahc_lock(ahc, &flags);
2373 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2374 ahc_unlock(ahc, &flags);
2375}
2376
92d161c3
JB		 2377static void ahc_linux_set_period(struct scsi_target *starget, int period)
2378{
2379 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2380 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2381 struct ahc_tmode_tstate *tstate;
2382 struct ahc_initiator_tinfo *tinfo
2383 = ahc_fetch_transinfo(ahc,
2384 starget->channel + 'A',
2385 shost->this_id, starget->id, &tstate);
2386 struct ahc_devinfo devinfo;
597487b9 2387 unsigned int ppr_options = tinfo->goal.ppr_options;
92d161c3 2388 unsigned long flags;
597487b9 2389 unsigned long offset = tinfo->goal.offset;
d1d7b19d 2390 const struct ahc_syncrate *syncrate;
92d161c3
JB		 2391
2392 if (offset == 0)
2393 offset = MAX_OFFSET;
2394
2bf2c568
JB		 2395 if (period < 9)
2396 period = 9; /* 12.5ns is our minimum */
0f82cb92
JB		 2397 if (period == 9) {
2398 if (spi_max_width(starget))
2399 ppr_options |= MSG_EXT_PPR_DT_REQ;
2400 else
2401 /* need wide for DT and need DT for 12.5 ns */
2402 period = 10;
2403 }
2bf2c568 2404
92d161c3
JB		 2405 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2406 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8
JB		 2407
2408 /* all PPR requests apart from QAS require wide transfers */
2409 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
fad01ef8
JB		 2410 if (spi_width(starget) == 0)
2411 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2412 }
2413
92d161c3
JB		 2414 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2415 ahc_lock(ahc, &flags);
2416 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2417 ppr_options, AHC_TRANS_GOAL, FALSE);
2418 ahc_unlock(ahc, &flags);
2419}
2420
92d161c3
JB		 2421static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2422{
2423 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2424 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2425 struct ahc_tmode_tstate *tstate;
2426 struct ahc_initiator_tinfo *tinfo
2427 = ahc_fetch_transinfo(ahc,
2428 starget->channel + 'A',
2429 shost->this_id, starget->id, &tstate);
2430 struct ahc_devinfo devinfo;
2431 unsigned int ppr_options = 0;
2432 unsigned int period = 0;
2433 unsigned long flags;
d1d7b19d 2434 const struct ahc_syncrate *syncrate = NULL;
92d161c3
JB		 2435
2436 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2437 starget->channel + 'A', ROLE_INITIATOR);
2438 if (offset != 0) {
2439 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
597487b9
JB		 2440 period = tinfo->goal.period;
2441 ppr_options = tinfo->goal.ppr_options;
92d161c3
JB		 2442 }
2443 ahc_lock(ahc, &flags);
2444 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2445 ppr_options, AHC_TRANS_GOAL, FALSE);
2446 ahc_unlock(ahc, &flags);
2447}
2448
92d161c3
JB		 2449static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2450{
2451 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2452 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2453 struct ahc_tmode_tstate *tstate;
2454 struct ahc_initiator_tinfo *tinfo
2455 = ahc_fetch_transinfo(ahc,
2456 starget->channel + 'A',
2457 shost->this_id, starget->id, &tstate);
2458 struct ahc_devinfo devinfo;
597487b9 2459 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2460 & ~MSG_EXT_PPR_DT_REQ;
597487b9 2461 unsigned int period = tinfo->goal.period;
84e66ee7 2462 unsigned int width = tinfo->goal.width;
92d161c3 2463 unsigned long flags;
d1d7b19d 2464 const struct ahc_syncrate *syncrate;
92d161c3 2465
0f82cb92 2466 if (dt && spi_max_width(starget)) {
2bf2c568 2467 ppr_options |= MSG_EXT_PPR_DT_REQ;
84e66ee7
JB		 2468 if (!width)
2469 ahc_linux_set_width(starget, 1);
2470 } else if (period == 9)
2bf2c568
JB		 2471 period = 10; /* if resetting DT, period must be >= 25ns */
2472
92d161c3
JB		 2473 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2474 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2475 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
92d161c3 2476 ahc_lock(ahc, &flags);
597487b9 2477 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3
JB		 2478 ppr_options, AHC_TRANS_GOAL, FALSE);
2479 ahc_unlock(ahc, &flags);
2480}
2481
ace4e718
JB		 2482#if 0
2483/* FIXME: This code claims to support IU and QAS. However, the actual
2484 * sequencer code and aic7xxx_core have no support for these parameters and
2485 * will get into a bad state if they're negotiated. Do not enable this
2486 * unless you know what you're doing */
92d161c3
JB		 2487static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2488{
2489 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2490 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2491 struct ahc_tmode_tstate *tstate;
2492 struct ahc_initiator_tinfo *tinfo
2493 = ahc_fetch_transinfo(ahc,
2494 starget->channel + 'A',
2495 shost->this_id, starget->id, &tstate);
2496 struct ahc_devinfo devinfo;
597487b9 2497 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2498 & ~MSG_EXT_PPR_QAS_REQ;
597487b9 2499 unsigned int period = tinfo->goal.period;
92d161c3
JB		 2500 unsigned long flags;
2501 struct ahc_syncrate *syncrate;
2502
2503 if (qas)
2504 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2505
2506 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2507 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2508 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2509 ahc_lock(ahc, &flags);
597487b9 2510 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3
JB		 2511 ppr_options, AHC_TRANS_GOAL, FALSE);
2512 ahc_unlock(ahc, &flags);
2513}
2514
92d161c3
JB		 2515static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2516{
2517 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2518 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2519 struct ahc_tmode_tstate *tstate;
2520 struct ahc_initiator_tinfo *tinfo
2521 = ahc_fetch_transinfo(ahc,
2522 starget->channel + 'A',
2523 shost->this_id, starget->id, &tstate);
2524 struct ahc_devinfo devinfo;
597487b9 2525 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2526 & ~MSG_EXT_PPR_IU_REQ;
597487b9 2527 unsigned int period = tinfo->goal.period;
92d161c3
JB		 2528 unsigned long flags;
2529 struct ahc_syncrate *syncrate;
2530
2531 if (iu)
2532 ppr_options |= MSG_EXT_PPR_IU_REQ;
2533
2534 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2535 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2536 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2537 ahc_lock(ahc, &flags);
597487b9 2538 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3
JB		 2539 ppr_options, AHC_TRANS_GOAL, FALSE);
2540 ahc_unlock(ahc, &flags);
2541}
ace4e718 2542#endif
92d161c3 2543
b2d8bfe1
JB		 2544static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2545{
2546 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
cf2b5d3f 2547 unsigned long flags;
3e3c60e3 2548 u8 mode;
b2d8bfe1 2549
3e3c60e3
JB		 2550 if (!(ahc->features & AHC_ULTRA2)) {
2551 /* non-LVD chipset, may not have SBLKCTL reg */
b2d8bfe1
JB		 2552 spi_signalling(shost) =
2553 ahc->features & AHC_HVD ?
2554 SPI_SIGNAL_HVD :
2555 SPI_SIGNAL_SE;
3e3c60e3
JB		 2556 return;
2557 }
2558
cf2b5d3f
DL		 2559 ahc_lock(ahc, &flags);
2560 ahc_pause(ahc);
3e3c60e3 2561 mode = ahc_inb(ahc, SBLKCTL);
cf2b5d3f
DL		 2562 ahc_unpause(ahc);
2563 ahc_unlock(ahc, &flags);
3e3c60e3
JB		 2564
2565 if (mode & ENAB40)
2566 spi_signalling(shost) = SPI_SIGNAL_LVD;
2567 else if (mode & ENAB20)
2568 spi_signalling(shost) = SPI_SIGNAL_SE;
b2d8bfe1
JB		 2569 else
2570 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2571}
2572
92d161c3 2573static struct spi_function_template ahc_linux_transport_functions = {
92d161c3
JB		 2574 .set_offset = ahc_linux_set_offset,
2575 .show_offset = 1,
92d161c3
JB		 2576 .set_period = ahc_linux_set_period,
2577 .show_period = 1,
92d161c3
JB		 2578 .set_width = ahc_linux_set_width,
2579 .show_width = 1,
92d161c3
JB		 2580 .set_dt = ahc_linux_set_dt,
2581 .show_dt = 1,
ace4e718 2582#if 0
92d161c3
JB		 2583 .set_iu = ahc_linux_set_iu,
2584 .show_iu = 1,
92d161c3
JB		 2585 .set_qas = ahc_linux_set_qas,
2586 .show_qas = 1,
ace4e718 2587#endif
b2d8bfe1 2588 .get_signalling = ahc_linux_get_signalling,
92d161c3
JB		 2589};
2590
2591
2592
1da177e4
LT		 2593static int __init
2594ahc_linux_init(void)
2595{
dfd287f6
CH		 2596 /*
2597 * If we've been passed any parameters, process them now.
2598 */
2599 if (aic7xxx)
2600 aic7xxx_setup(aic7xxx);
2601
2602 ahc_linux_transport_template =
2603 spi_attach_transport(&ahc_linux_transport_functions);
92d161c3
JB		 2604 if (!ahc_linux_transport_template)
2605 return -ENODEV;
dfd287f6 2606
b1abb4d6
JB		 2607 scsi_transport_reserve_device(ahc_linux_transport_template,
2608 sizeof(struct ahc_linux_device));
dfd287f6 2609
dfd287f6
CH		 2610 ahc_linux_pci_init();
2611 ahc_linux_eisa_init();
2612 return 0;
1da177e4
LT		 2613}
2614
2615static void
2616ahc_linux_exit(void)
2617{
1da177e4
LT		 2618 ahc_linux_pci_exit();
2619 ahc_linux_eisa_exit();
92d161c3 2620 spi_release_transport(ahc_linux_transport_template);
1da177e4
LT		 2621}
2622
2623module_init(ahc_linux_init);
2624module_exit(ahc_linux_exit);
kernel source for telekom puls (alcatel/mediatek)