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[SCSI] allow sleeping in ->eh_bus_reset_handler()
[deliverable/linux.git] / drivers / scsi / aic7xxx / aic7xxx_osm.c
CommitLineData
1da177e4
LT		 1/*
2 * Adaptec AIC7xxx device driver for Linux.
3 *
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
5 *
6 * Copyright (c) 1994 John Aycock
7 * The University of Calgary Department of Computer Science.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, write to
21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
24 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
25 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
26 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
27 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
28 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
29 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
30 * ANSI SCSI-2 specification (draft 10c), ...
31 *
32 * --------------------------------------------------------------------------
33 *
34 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
35 *
36 * Substantially modified to include support for wide and twin bus
37 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
38 * SCB paging, and other rework of the code.
39 *
40 * --------------------------------------------------------------------------
41 * Copyright (c) 1994-2000 Justin T. Gibbs.
42 * Copyright (c) 2000-2001 Adaptec Inc.
43 * All rights reserved.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions, and the following disclaimer,
50 * without modification.
51 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
52 * substantially similar to the "NO WARRANTY" disclaimer below
53 * ("Disclaimer") and any redistribution must be conditioned upon
54 * including a substantially similar Disclaimer requirement for further
55 * binary redistribution.
56 * 3. Neither the names of the above-listed copyright holders nor the names
57 * of any contributors may be used to endorse or promote products derived
58 * from this software without specific prior written permission.
59 *
60 * Alternatively, this software may be distributed under the terms of the
61 * GNU General Public License ("GPL") version 2 as published by the Free
62 * Software Foundation.
63 *
64 * NO WARRANTY
65 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
66 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
67 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
68 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
69 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
73 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
74 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
75 * POSSIBILITY OF SUCH DAMAGES.
76 *
77 *---------------------------------------------------------------------------
78 *
79 * Thanks also go to (in alphabetical order) the following:
80 *
81 * Rory Bolt - Sequencer bug fixes
82 * Jay Estabrook - Initial DEC Alpha support
83 * Doug Ledford - Much needed abort/reset bug fixes
84 * Kai Makisara - DMAing of SCBs
85 *
86 * A Boot time option was also added for not resetting the scsi bus.
87 *
88 * Form: aic7xxx=extended
89 * aic7xxx=no_reset
90 * aic7xxx=verbose
91 *
92 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
93 *
94 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
95 */
96
97/*
98 * Further driver modifications made by Doug Ledford <dledford@redhat.com>
99 *
100 * Copyright (c) 1997-1999 Doug Ledford
101 *
102 * These changes are released under the same licensing terms as the FreeBSD
103 * driver written by Justin Gibbs. Please see his Copyright notice above
104 * for the exact terms and conditions covering my changes as well as the
105 * warranty statement.
106 *
107 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
108 * but are not limited to:
109 *
110 * 1: Import of the latest FreeBSD sequencer code for this driver
111 * 2: Modification of kernel code to accommodate different sequencer semantics
112 * 3: Extensive changes throughout kernel portion of driver to improve
113 * abort/reset processing and error hanndling
114 * 4: Other work contributed by various people on the Internet
115 * 5: Changes to printk information and verbosity selection code
116 * 6: General reliability related changes, especially in IRQ management
117 * 7: Modifications to the default probe/attach order for supported cards
118 * 8: SMP friendliness has been improved
119 *
120 */
121
122#include "aic7xxx_osm.h"
123#include "aic7xxx_inline.h"
124#include <scsi/scsicam.h>
92d161c3 125
126static struct scsi_transport_template *ahc_linux_transport_template = NULL;
1da177e4
LT		 127
128/*
129 * Include aiclib.c as part of our
130 * "module dependencies are hard" work around.
131 */
132#include "aiclib.c"
133
134#include <linux/init.h> /* __setup */
1da177e4
LT		 135#include <linux/mm.h> /* For fetching system memory size */
136#include <linux/blkdev.h> /* For block_size() */
137#include <linux/delay.h> /* For ssleep/msleep */
138
139/*
140 * Lock protecting manipulation of the ahc softc list.
141 */
142spinlock_t ahc_list_spinlock;
143
1da177e4
LT		 144/*
145 * Set this to the delay in seconds after SCSI bus reset.
146 * Note, we honor this only for the initial bus reset.
147 * The scsi error recovery code performs its own bus settle
148 * delay handling for error recovery actions.
149 */
150#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
151#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
152#else
153#define AIC7XXX_RESET_DELAY 5000
154#endif
155
156/*
157 * Control collection of SCSI transfer statistics for the /proc filesystem.
158 *
159 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
160 * NOTE: This does affect performance since it has to maintain statistics.
161 */
162#ifdef CONFIG_AIC7XXX_PROC_STATS
163#define AIC7XXX_PROC_STATS
164#endif
165
166/*
167 * To change the default number of tagged transactions allowed per-device,
168 * add a line to the lilo.conf file like:
169 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
170 * which will result in the first four devices on the first two
171 * controllers being set to a tagged queue depth of 32.
172 *
173 * The tag_commands is an array of 16 to allow for wide and twin adapters.
174 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
175 * for channel 1.
176 */
177typedef struct {
178 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
179} adapter_tag_info_t;
180
181/*
182 * Modify this as you see fit for your system.
183 *
184 * 0 tagged queuing disabled
185 * 1 <= n <= 253 n == max tags ever dispatched.
186 *
187 * The driver will throttle the number of commands dispatched to a
188 * device if it returns queue full. For devices with a fixed maximum
189 * queue depth, the driver will eventually determine this depth and
190 * lock it in (a console message is printed to indicate that a lock
191 * has occurred). On some devices, queue full is returned for a temporary
192 * resource shortage. These devices will return queue full at varying
193 * depths. The driver will throttle back when the queue fulls occur and
194 * attempt to slowly increase the depth over time as the device recovers
195 * from the resource shortage.
196 *
197 * In this example, the first line will disable tagged queueing for all
198 * the devices on the first probed aic7xxx adapter.
199 *
200 * The second line enables tagged queueing with 4 commands/LUN for IDs
201 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
202 * driver to attempt to use up to 64 tags for ID 1.
203 *
204 * The third line is the same as the first line.
205 *
206 * The fourth line disables tagged queueing for devices 0 and 3. It
207 * enables tagged queueing for the other IDs, with 16 commands/LUN
208 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
209 * IDs 2, 5-7, and 9-15.
210 */
211
212/*
213 * NOTE: The below structure is for reference only, the actual structure
214 * to modify in order to change things is just below this comment block.
215adapter_tag_info_t aic7xxx_tag_info[] =
216{
217 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
218 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
219 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
220 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
221};
222*/
223
224#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
225#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
226#else
227#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
228#endif
229
230#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
231 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
232 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
233 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
234 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
235 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
236 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
237 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
238 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
239}
240
241/*
242 * By default, use the number of commands specified by
243 * the users kernel configuration.
244 */
245static adapter_tag_info_t aic7xxx_tag_info[] =
246{
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 {AIC7XXX_CONFIGED_TAG_COMMANDS},
255 {AIC7XXX_CONFIGED_TAG_COMMANDS},
256 {AIC7XXX_CONFIGED_TAG_COMMANDS},
257 {AIC7XXX_CONFIGED_TAG_COMMANDS},
258 {AIC7XXX_CONFIGED_TAG_COMMANDS},
259 {AIC7XXX_CONFIGED_TAG_COMMANDS},
260 {AIC7XXX_CONFIGED_TAG_COMMANDS},
261 {AIC7XXX_CONFIGED_TAG_COMMANDS},
262 {AIC7XXX_CONFIGED_TAG_COMMANDS}
263};
264
1da177e4
LT		 265/*
266 * There should be a specific return value for this in scsi.h, but
267 * it seems that most drivers ignore it.
268 */
269#define DID_UNDERFLOW DID_ERROR
270
271void
272ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
273{
274 printk("(scsi%d:%c:%d:%d): ",
275 ahc->platform_data->host->host_no,
276 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
277 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
278 scb != NULL ? SCB_GET_LUN(scb) : -1);
279}
280
281/*
282 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
283 * cards in the system. This should be fixed. Exceptions to this
284 * rule are noted in the comments.
285 */
286
287/*
288 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
289 * has no effect on any later resets that might occur due to things like
290 * SCSI bus timeouts.
291 */
292static uint32_t aic7xxx_no_reset;
293
294/*
295 * Certain PCI motherboards will scan PCI devices from highest to lowest,
296 * others scan from lowest to highest, and they tend to do all kinds of
297 * strange things when they come into contact with PCI bridge chips. The
298 * net result of all this is that the PCI card that is actually used to boot
299 * the machine is very hard to detect. Most motherboards go from lowest
300 * PCI slot number to highest, and the first SCSI controller found is the
301 * one you boot from. The only exceptions to this are when a controller
302 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
303 * from lowest PCI slot number to highest PCI slot number. We also force
304 * all controllers with their BIOS disabled to the end of the list. This
305 * works on *almost* all computers. Where it doesn't work, we have this
306 * option. Setting this option to non-0 will reverse the order of the sort
307 * to highest first, then lowest, but will still leave cards with their BIOS
308 * disabled at the very end. That should fix everyone up unless there are
309 * really strange cirumstances.
310 */
311static uint32_t aic7xxx_reverse_scan;
312
313/*
314 * Should we force EXTENDED translation on a controller.
315 * 0 == Use whatever is in the SEEPROM or default to off
316 * 1 == Use whatever is in the SEEPROM or default to on
317 */
318static uint32_t aic7xxx_extended;
319
320/*
321 * PCI bus parity checking of the Adaptec controllers. This is somewhat
322 * dubious at best. To my knowledge, this option has never actually
323 * solved a PCI parity problem, but on certain machines with broken PCI
324 * chipset configurations where stray PCI transactions with bad parity are
325 * the norm rather than the exception, the error messages can be overwelming.
326 * It's included in the driver for completeness.
327 * 0 = Shut off PCI parity check
328 * non-0 = reverse polarity pci parity checking
329 */
330static uint32_t aic7xxx_pci_parity = ~0;
331
1da177e4
LT		 332/*
333 * There are lots of broken chipsets in the world. Some of them will
334 * violate the PCI spec when we issue byte sized memory writes to our
335 * controller. I/O mapped register access, if allowed by the given
336 * platform, will work in almost all cases.
337 */
338uint32_t aic7xxx_allow_memio = ~0;
339
340/*
341 * aic7xxx_detect() has been run, so register all device arrivals
342 * immediately with the system rather than deferring to the sorted
343 * attachment performed by aic7xxx_detect().
344 */
345int aic7xxx_detect_complete;
346
347/*
348 * So that we can set how long each device is given as a selection timeout.
349 * The table of values goes like this:
350 * 0 - 256ms
351 * 1 - 128ms
352 * 2 - 64ms
353 * 3 - 32ms
354 * We default to 256ms because some older devices need a longer time
355 * to respond to initial selection.
356 */
357static uint32_t aic7xxx_seltime;
358
359/*
360 * Certain devices do not perform any aging on commands. Should the
361 * device be saturated by commands in one portion of the disk, it is
362 * possible for transactions on far away sectors to never be serviced.
363 * To handle these devices, we can periodically send an ordered tag to
364 * force all outstanding transactions to be serviced prior to a new
365 * transaction.
366 */
367uint32_t aic7xxx_periodic_otag;
368
369/*
370 * Module information and settable options.
371 */
372static char *aic7xxx = NULL;
373
374MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
375MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
376MODULE_LICENSE("Dual BSD/GPL");
377MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
378module_param(aic7xxx, charp, 0444);
379MODULE_PARM_DESC(aic7xxx,
380"period delimited, options string.\n"
381" verbose Enable verbose/diagnostic logging\n"
382" allow_memio Allow device registers to be memory mapped\n"
383" debug Bitmask of debug values to enable\n"
384" no_probe Toggle EISA/VLB controller probing\n"
385" probe_eisa_vl Toggle EISA/VLB controller probing\n"
386" no_reset Supress initial bus resets\n"
387" extended Enable extended geometry on all controllers\n"
388" periodic_otag Send an ordered tagged transaction\n"
389" periodically to prevent tag starvation.\n"
390" This may be required by some older disk\n"
391" drives or RAID arrays.\n"
392" reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
393" tag_info:<tag_str> Set per-target tag depth\n"
394" global_tag_depth:<int> Global tag depth for every target\n"
395" on every bus\n"
1da177e4
LT		 396" seltime:<int> Selection Timeout\n"
397" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
398"\n"
399" Sample /etc/modprobe.conf line:\n"
400" Toggle EISA/VLB probing\n"
401" Set tag depth on Controller 1/Target 1 to 10 tags\n"
402" Shorten the selection timeout to 128ms\n"
403"\n"
404" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
405);
406
407static void ahc_linux_handle_scsi_status(struct ahc_softc *,
b1abb4d6 408 struct scsi_device *,
1da177e4
LT		 409 struct scb *);
410static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
013791ee 411 struct scsi_cmnd *cmd);
1da177e4
LT		 412static void ahc_linux_sem_timeout(u_long arg);
413static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
414static void ahc_linux_release_simq(u_long arg);
013791ee 415static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
1da177e4 416static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
1da177e4
LT		 417static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
418 struct ahc_devinfo *devinfo);
b1abb4d6 419static void ahc_linux_device_queue_depth(struct scsi_device *);
e4e360c3
JB		 420static int ahc_linux_run_command(struct ahc_softc*,
421 struct ahc_linux_device *,
422 struct scsi_cmnd *);
1da177e4
LT		 423static void ahc_linux_setup_tag_info_global(char *p);
424static aic_option_callback_t ahc_linux_setup_tag_info;
1da177e4
LT		 425static int aic7xxx_setup(char *s);
426static int ahc_linux_next_unit(void);
1da177e4
LT		 427
428/********************************* Inlines ************************************/
1da177e4
LT		 429static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
430
431static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
432 struct ahc_dma_seg *sg,
433 dma_addr_t addr, bus_size_t len);
434
1da177e4
LT		 435static __inline void
436ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
437{
013791ee 438 struct scsi_cmnd *cmd;
1da177e4
LT		 439
440 cmd = scb->io_ctx;
441 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
442 if (cmd->use_sg != 0) {
443 struct scatterlist *sg;
444
445 sg = (struct scatterlist *)cmd->request_buffer;
446 pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg,
be7db055 447 cmd->sc_data_direction);
1da177e4
LT		 448 } else if (cmd->request_bufflen != 0) {
449 pci_unmap_single(ahc->dev_softc,
450 scb->platform_data->buf_busaddr,
451 cmd->request_bufflen,
be7db055 452 cmd->sc_data_direction);
1da177e4
LT		 453 }
454}
455
456static __inline int
457ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
458 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
459{
460 int consumed;
461
462 if ((scb->sg_count + 1) > AHC_NSEG)
463 panic("Too few segs for dma mapping. "
464 "Increase AHC_NSEG\n");
465
466 consumed = 1;
467 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
468 scb->platform_data->xfer_len += len;
469
470 if (sizeof(dma_addr_t) > 4
471 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
472 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
473
474 sg->len = ahc_htole32(len);
475 return (consumed);
476}
477
1da177e4
LT		 478/*
479 * Try to detect an Adaptec 7XXX controller.
480 */
481static int
013791ee 482ahc_linux_detect(struct scsi_host_template *template)
1da177e4
LT		 483{
484 struct ahc_softc *ahc;
485 int found = 0;
486
1da177e4
LT		 487 /*
488 * If we've been passed any parameters, process them now.
489 */
490 if (aic7xxx)
491 aic7xxx_setup(aic7xxx);
492
493 template->proc_name = "aic7xxx";
494
495 /*
496 * Initialize our softc list lock prior to
497 * probing for any adapters.
498 */
499 ahc_list_lockinit();
500
501 found = ahc_linux_pci_init();
502 if (!ahc_linux_eisa_init())
503 found++;
504
505 /*
506 * Register with the SCSI layer all
507 * controllers we've found.
508 */
509 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
510
511 if (ahc_linux_register_host(ahc, template) == 0)
512 found++;
513 }
514
1da177e4
LT		 515 aic7xxx_detect_complete++;
516
517 return (found);
518}
519
1da177e4
LT		 520/*
521 * Return a string describing the driver.
522 */
523static const char *
524ahc_linux_info(struct Scsi_Host *host)
525{
526 static char buffer[512];
527 char ahc_info[256];
528 char *bp;
529 struct ahc_softc *ahc;
530
531 bp = &buffer[0];
532 ahc = *(struct ahc_softc **)host->hostdata;
533 memset(bp, 0, sizeof(buffer));
534 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
535 strcat(bp, AIC7XXX_DRIVER_VERSION);
536 strcat(bp, "\n");
537 strcat(bp, " <");
538 strcat(bp, ahc->description);
539 strcat(bp, ">\n");
540 strcat(bp, " ");
541 ahc_controller_info(ahc, ahc_info);
542 strcat(bp, ahc_info);
543 strcat(bp, "\n");
544
545 return (bp);
546}
547
548/*
549 * Queue an SCB to the controller.
550 */
551static int
013791ee 552ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
1da177e4
LT		 553{
554 struct ahc_softc *ahc;
b1abb4d6 555 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
1da177e4
LT		 556
557 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
558
559 /*
560 * Save the callback on completion function.
561 */
562 cmd->scsi_done = scsi_done;
563
1da177e4
LT		 564 /*
565 * Close the race of a command that was in the process of
566 * being queued to us just as our simq was frozen. Let
567 * DV commands through so long as we are only frozen to
568 * perform DV.
569 */
e4e360c3
JB		 570 if (ahc->platform_data->qfrozen != 0)
571 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 572
1da177e4 573 cmd->result = CAM_REQ_INPROG << 16;
e4e360c3
JB		 574
575 return ahc_linux_run_command(ahc, dev, cmd);
1da177e4
LT		 576}
577
b1abb4d6
JB		 578static inline struct scsi_target **
579ahc_linux_target_in_softc(struct scsi_target *starget)
1da177e4 580{
b1abb4d6
JB		 581 struct ahc_softc *ahc =
582 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
fb3089df 583 unsigned int target_offset;
b1abb4d6
JB		 584
585 target_offset = starget->id;
586 if (starget->channel != 0)
587 target_offset += 8;
588
589 return &ahc->platform_data->starget[target_offset];
590}
591
592static int
593ahc_linux_target_alloc(struct scsi_target *starget)
594{
595 struct ahc_softc *ahc =
596 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
597 struct seeprom_config *sc = ahc->seep_config;
fb3089df 598 unsigned long flags;
b1abb4d6
JB		 599 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
600 struct ahc_linux_target *targ = scsi_transport_target_data(starget);
601 unsigned short scsirate;
602 struct ahc_devinfo devinfo;
603 struct ahc_initiator_tinfo *tinfo;
604 struct ahc_tmode_tstate *tstate;
605 char channel = starget->channel + 'A';
606 unsigned int our_id = ahc->our_id;
607 unsigned int target_offset;
c7525233
JB		 608
609 target_offset = starget->id;
610 if (starget->channel != 0)
611 target_offset += 8;
b1abb4d6
JB		 612
613 if (starget->channel)
614 our_id = ahc->our_id_b;
1da177e4 615
fb3089df 616 ahc_lock(ahc, &flags);
fb3089df 617
b1abb4d6 618 BUG_ON(*ahc_targp != NULL);
c7525233 619
b1abb4d6
JB		 620 *ahc_targp = starget;
621 memset(targ, 0, sizeof(*targ));
c7525233 622
b1abb4d6 623 if (sc) {
12021fff
JB		 624 int maxsync = AHC_SYNCRATE_DT;
625 int ultra = 0;
626 int flags = sc->device_flags[target_offset];
627
628 if (ahc->flags & AHC_NEWEEPROM_FMT) {
629 if (flags & CFSYNCHISULTRA)
630 ultra = 1;
631 } else if (flags & CFULTRAEN)
632 ultra = 1;
633 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
634 * change it to ultra=0, CFXFER = 0 */
635 if(ultra && (flags & CFXFER) == 0x04) {
636 ultra = 0;
637 flags &= ~CFXFER;
638 }
639
b1abb4d6 640 if ((ahc->features & AHC_ULTRA2) != 0) {
12021fff 641 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
b1abb4d6 642 } else {
12021fff
JB		 643 scsirate = (flags & CFXFER) << 4;
644 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
645 AHC_SYNCRATE_FAST;
c7525233 646 }
12021fff
JB		 647 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
648 if (!(flags & CFSYNCH))
649 spi_max_offset(starget) = 0;
b1abb4d6 650 spi_min_period(starget) =
12021fff
JB		 651 ahc_find_period(ahc, scsirate, maxsync);
652
b1abb4d6
JB		 653 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
654 starget->id, &tstate);
c7525233 655 }
b1abb4d6
JB		 656 ahc_compile_devinfo(&devinfo, our_id, starget->id,
657 CAM_LUN_WILDCARD, channel,
658 ROLE_INITIATOR);
659 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
660 AHC_TRANS_GOAL, /*paused*/FALSE);
661 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
662 AHC_TRANS_GOAL, /*paused*/FALSE);
fb3089df 663 ahc_unlock(ahc, &flags);
b1abb4d6
JB		 664
665 return 0;
666}
667
668static void
669ahc_linux_target_destroy(struct scsi_target *starget)
670{
671 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
672
673 *ahc_targp = NULL;
674}
675
676static int
677ahc_linux_slave_alloc(struct scsi_device *sdev)
678{
679 struct ahc_softc *ahc =
680 *((struct ahc_softc **)sdev->host->hostdata);
681 struct scsi_target *starget = sdev->sdev_target;
682 struct ahc_linux_target *targ = scsi_transport_target_data(starget);
683 struct ahc_linux_device *dev;
684
685 if (bootverbose)
686 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
687
688 BUG_ON(targ->sdev[sdev->lun] != NULL);
689
690 dev = scsi_transport_device_data(sdev);
691 memset(dev, 0, sizeof(*dev));
692
693 /*
694 * We start out life using untagged
695 * transactions of which we allow one.
696 */
697 dev->openings = 1;
698
699 /*
700 * Set maxtags to 0. This will be changed if we
701 * later determine that we are dealing with
702 * a tagged queuing capable device.
703 */
704 dev->maxtags = 0;
705
706 targ->sdev[sdev->lun] = sdev;
707
708 return 0;
1da177e4
LT		 709}
710
711static int
b1abb4d6 712ahc_linux_slave_configure(struct scsi_device *sdev)
1da177e4
LT		 713{
714 struct ahc_softc *ahc;
1da177e4 715
b1abb4d6 716 ahc = *((struct ahc_softc **)sdev->host->hostdata);
c7525233 717
1da177e4 718 if (bootverbose)
b1abb4d6 719 printf("%s: Slave Configure %d\n", ahc_name(ahc), sdev->id);
c7525233 720
b1abb4d6 721 ahc_linux_device_queue_depth(sdev);
cb624029 722
723 /* Initial Domain Validation */
b1abb4d6
JB		 724 if (!spi_initial_dv(sdev->sdev_target))
725 spi_dv_device(sdev);
cb624029 726
c7525233 727 return 0;
1da177e4
LT		 728}
729
730static void
b1abb4d6 731ahc_linux_slave_destroy(struct scsi_device *sdev)
1da177e4
LT		 732{
733 struct ahc_softc *ahc;
b1abb4d6
JB		 734 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
735 struct ahc_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
1da177e4 736
b1abb4d6 737 ahc = *((struct ahc_softc **)sdev->host->hostdata);
1da177e4 738 if (bootverbose)
b1abb4d6 739 printf("%s: Slave Destroy %d\n", ahc_name(ahc), sdev->id);
c7525233
JB		 740
741 BUG_ON(dev->active);
742
b1abb4d6 743 targ->sdev[sdev->lun] = NULL;
1da177e4 744}
1da177e4
LT		 745
746#if defined(__i386__)
747/*
748 * Return the disk geometry for the given SCSI device.
749 */
750static int
1da177e4
LT		 751ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
752 sector_t capacity, int geom[])
753{
754 uint8_t *bh;
1da177e4
LT		 755 int heads;
756 int sectors;
757 int cylinders;
758 int ret;
759 int extended;
760 struct ahc_softc *ahc;
761 u_int channel;
762
763 ahc = *((struct ahc_softc **)sdev->host->hostdata);
764 channel = sdev->channel;
765
1da177e4 766 bh = scsi_bios_ptable(bdev);
1da177e4
LT		 767 if (bh) {
768 ret = scsi_partsize(bh, capacity,
769 &geom[2], &geom[0], &geom[1]);
1da177e4 770 kfree(bh);
1da177e4
LT		 771 if (ret != -1)
772 return (ret);
773 }
774 heads = 64;
775 sectors = 32;
776 cylinders = aic_sector_div(capacity, heads, sectors);
777
778 if (aic7xxx_extended != 0)
779 extended = 1;
780 else if (channel == 0)
781 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
782 else
783 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
784 if (extended && cylinders >= 1024) {
785 heads = 255;
786 sectors = 63;
787 cylinders = aic_sector_div(capacity, heads, sectors);
788 }
789 geom[0] = heads;
790 geom[1] = sectors;
791 geom[2] = cylinders;
792 return (0);
793}
794#endif
795
796/*
797 * Abort the current SCSI command(s).
798 */
799static int
013791ee 800ahc_linux_abort(struct scsi_cmnd *cmd)
1da177e4
LT		 801{
802 int error;
803
804 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
805 if (error != 0)
806 printf("aic7xxx_abort returns 0x%x\n", error);
807 return (error);
808}
809
810/*
811 * Attempt to send a target reset message to the device that timed out.
812 */
813static int
013791ee 814ahc_linux_dev_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 815{
816 int error;
817
818 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
819 if (error != 0)
820 printf("aic7xxx_dev_reset returns 0x%x\n", error);
821 return (error);
822}
823
824/*
825 * Reset the SCSI bus.
826 */
827static int
013791ee 828ahc_linux_bus_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 829{
830 struct ahc_softc *ahc;
1da177e4 831 int found;
68b3aa7c 832 unsigned long flags;
1da177e4
LT		 833
834 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
68b3aa7c
JG		 835
836 ahc_lock(ahc, &flags);
1da177e4
LT		 837 found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
838 /*initiate reset*/TRUE);
68b3aa7c 839 ahc_unlock(ahc, &flags);
1da177e4
LT		 840
841 if (bootverbose)
842 printf("%s: SCSI bus reset delivered. "
843 "%d SCBs aborted.\n", ahc_name(ahc), found);
844
845 return SUCCESS;
846}
847
013791ee 848struct scsi_host_template aic7xxx_driver_template = {
1da177e4
LT		 849 .module = THIS_MODULE,
850 .name = "aic7xxx",
851 .proc_info = ahc_linux_proc_info,
852 .info = ahc_linux_info,
853 .queuecommand = ahc_linux_queue,
854 .eh_abort_handler = ahc_linux_abort,
855 .eh_device_reset_handler = ahc_linux_dev_reset,
856 .eh_bus_reset_handler = ahc_linux_bus_reset,
857#if defined(__i386__)
858 .bios_param = ahc_linux_biosparam,
859#endif
860 .can_queue = AHC_MAX_QUEUE,
861 .this_id = -1,
862 .cmd_per_lun = 2,
863 .use_clustering = ENABLE_CLUSTERING,
864 .slave_alloc = ahc_linux_slave_alloc,
865 .slave_configure = ahc_linux_slave_configure,
866 .slave_destroy = ahc_linux_slave_destroy,
b1abb4d6
JB		 867 .target_alloc = ahc_linux_target_alloc,
868 .target_destroy = ahc_linux_target_destroy,
1da177e4
LT		 869};
870
871/**************************** Tasklet Handler *********************************/
872
1da177e4
LT		 873/******************************** Macros **************************************/
874#define BUILD_SCSIID(ahc, cmd) \
875 ((((cmd)->device->id << TID_SHIFT) & TID) \
876 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
877 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
878
879/******************************** Bus DMA *************************************/
880int
881ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
882 bus_size_t alignment, bus_size_t boundary,
883 dma_addr_t lowaddr, dma_addr_t highaddr,
884 bus_dma_filter_t *filter, void *filterarg,
885 bus_size_t maxsize, int nsegments,
886 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
887{
888 bus_dma_tag_t dmat;
889
890 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
891 if (dmat == NULL)
892 return (ENOMEM);
893
894 /*
895 * Linux is very simplistic about DMA memory. For now don't
896 * maintain all specification information. Once Linux supplies
897 * better facilities for doing these operations, or the
898 * needs of this particular driver change, we might need to do
899 * more here.
900 */
901 dmat->alignment = alignment;
902 dmat->boundary = boundary;
903 dmat->maxsize = maxsize;
904 *ret_tag = dmat;
905 return (0);
906}
907
908void
909ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
910{
911 free(dmat, M_DEVBUF);
912}
913
914int
915ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
916 int flags, bus_dmamap_t *mapp)
917{
1da177e4 918 *vaddr = pci_alloc_consistent(ahc->dev_softc,
7dfa0f26 919 dmat->maxsize, mapp);
1da177e4 920 if (*vaddr == NULL)
7dfa0f26
CH		 921 return ENOMEM;
922 return 0;
1da177e4
LT		 923}
924
925void
926ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
927 void* vaddr, bus_dmamap_t map)
928{
929 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
7dfa0f26 930 vaddr, map);
1da177e4
LT		 931}
932
933int
934ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
935 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
936 void *cb_arg, int flags)
937{
938 /*
939 * Assume for now that this will only be used during
940 * initialization and not for per-transaction buffer mapping.
941 */
942 bus_dma_segment_t stack_sg;
943
7dfa0f26 944 stack_sg.ds_addr = map;
1da177e4
LT		 945 stack_sg.ds_len = dmat->maxsize;
946 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
947 return (0);
948}
949
950void
951ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
952{
1da177e4
LT		 953}
954
955int
956ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
957{
958 /* Nothing to do */
959 return (0);
960}
961
962/********************* Platform Dependent Functions ***************************/
963/*
964 * Compare "left hand" softc with "right hand" softc, returning:
965 * < 0 - lahc has a lower priority than rahc
966 * 0 - Softcs are equal
967 * > 0 - lahc has a higher priority than rahc
968 */
969int
970ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
971{
972 int value;
973 int rvalue;
974 int lvalue;
975
976 /*
977 * Under Linux, cards are ordered as follows:
978 * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
979 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
980 * 3) All remaining VLB/EISA devices sorted by ioport.
981 * 4) All remaining PCI devices sorted by bus/slot/func.
982 */
983 value = (lahc->flags & AHC_BIOS_ENABLED)
984 - (rahc->flags & AHC_BIOS_ENABLED);
985 if (value != 0)
986 /* Controllers with BIOS enabled have a *higher* priority */
987 return (value);
988
989 /*
990 * Same BIOS setting, now sort based on bus type.
991 * EISA and VL controllers sort together. EISA/VL
992 * have higher priority than PCI.
993 */
994 rvalue = (rahc->chip & AHC_BUS_MASK);
995 if (rvalue == AHC_VL)
996 rvalue = AHC_EISA;
997 lvalue = (lahc->chip & AHC_BUS_MASK);
998 if (lvalue == AHC_VL)
999 lvalue = AHC_EISA;
1000 value = rvalue - lvalue;
1001 if (value != 0)
1002 return (value);
1003
1004 /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
1005 switch (rvalue) {
1006#ifdef CONFIG_PCI
1007 case AHC_PCI:
1008 {
1009 char primary_channel;
1010
1011 if (aic7xxx_reverse_scan != 0)
1012 value = ahc_get_pci_bus(lahc->dev_softc)
1013 - ahc_get_pci_bus(rahc->dev_softc);
1014 else
1015 value = ahc_get_pci_bus(rahc->dev_softc)
1016 - ahc_get_pci_bus(lahc->dev_softc);
1017 if (value != 0)
1018 break;
1019 if (aic7xxx_reverse_scan != 0)
1020 value = ahc_get_pci_slot(lahc->dev_softc)
1021 - ahc_get_pci_slot(rahc->dev_softc);
1022 else
1023 value = ahc_get_pci_slot(rahc->dev_softc)
1024 - ahc_get_pci_slot(lahc->dev_softc);
1025 if (value != 0)
1026 break;
1027 /*
1028 * On multi-function devices, the user can choose
1029 * to have function 1 probed before function 0.
1030 * Give whichever channel is the primary channel
1031 * the highest priority.
1032 */
1033 primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
1034 value = -1;
1035 if (lahc->channel == primary_channel)
1036 value = 1;
1037 break;
1038 }
1039#endif
1040 case AHC_EISA:
1041 if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
1042 value = rahc->platform_data->bios_address
1043 - lahc->platform_data->bios_address;
1044 } else {
1045 value = rahc->bsh.ioport
1046 - lahc->bsh.ioport;
1047 }
1048 break;
1049 default:
1050 panic("ahc_softc_sort: invalid bus type");
1051 }
1052 return (value);
1053}
1054
1055static void
1056ahc_linux_setup_tag_info_global(char *p)
1057{
1058 int tags, i, j;
1059
1060 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1061 printf("Setting Global Tags= %d\n", tags);
1062
1063 for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
1064 for (j = 0; j < AHC_NUM_TARGETS; j++) {
1065 aic7xxx_tag_info[i].tag_commands[j] = tags;
1066 }
1067 }
1068}
1069
1070static void
1071ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1072{
1073
1074 if ((instance >= 0) && (targ >= 0)
1075 && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
1076 && (targ < AHC_NUM_TARGETS)) {
1077 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
1078 if (bootverbose)
1079 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1080 }
1081}
1082
1da177e4
LT		 1083/*
1084 * Handle Linux boot parameters. This routine allows for assigning a value
1085 * to a parameter with a ':' between the parameter and the value.
1086 * ie. aic7xxx=stpwlev:1,extended
1087 */
1088static int
1089aic7xxx_setup(char *s)
1090{
1091 int i, n;
1092 char *p;
1093 char *end;
1094
1095 static struct {
1096 const char *name;
1097 uint32_t *flag;
1098 } options[] = {
1099 { "extended", &aic7xxx_extended },
1100 { "no_reset", &aic7xxx_no_reset },
1101 { "verbose", &aic7xxx_verbose },
1102 { "allow_memio", &aic7xxx_allow_memio},
1103#ifdef AHC_DEBUG
1104 { "debug", &ahc_debug },
1105#endif
1106 { "reverse_scan", &aic7xxx_reverse_scan },
1da177e4
LT		 1107 { "periodic_otag", &aic7xxx_periodic_otag },
1108 { "pci_parity", &aic7xxx_pci_parity },
1109 { "seltime", &aic7xxx_seltime },
1110 { "tag_info", NULL },
1111 { "global_tag_depth", NULL },
1112 { "dv", NULL }
1113 };
1114
1115 end = strchr(s, '\0');
1116
1117 /*
1118 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1119 * will never be 0 in this case.
1120 */
1121 n = 0;
1122
1123 while ((p = strsep(&s, ",.")) != NULL) {
1124 if (*p == '\0')
1125 continue;
1126 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1127
1128 n = strlen(options[i].name);
1129 if (strncmp(options[i].name, p, n) == 0)
1130 break;
1131 }
1132 if (i == NUM_ELEMENTS(options))
1133 continue;
1134
1135 if (strncmp(p, "global_tag_depth", n) == 0) {
1136 ahc_linux_setup_tag_info_global(p + n);
1137 } else if (strncmp(p, "tag_info", n) == 0) {
1138 s = aic_parse_brace_option("tag_info", p + n, end,
1139 2, ahc_linux_setup_tag_info, 0);
1da177e4
LT		 1140 } else if (p[n] == ':') {
1141 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1142 } else if (strncmp(p, "verbose", n) == 0) {
1143 *(options[i].flag) = 1;
1144 } else {
1145 *(options[i].flag) ^= 0xFFFFFFFF;
1146 }
1147 }
1148 return 1;
1149}
1150
1151__setup("aic7xxx=", aic7xxx_setup);
1152
1153uint32_t aic7xxx_verbose;
1154
1155int
013791ee 1156ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1da177e4
LT		 1157{
1158 char buf[80];
1159 struct Scsi_Host *host;
1160 char *new_name;
1161 u_long s;
1da177e4
LT		 1162
1163 template->name = ahc->description;
1164 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1165 if (host == NULL)
1166 return (ENOMEM);
1167
1168 *((struct ahc_softc **)host->hostdata) = ahc;
1169 ahc_lock(ahc, &s);
1da177e4 1170 scsi_assign_lock(host, &ahc->platform_data->spin_lock);
1da177e4
LT		 1171 ahc->platform_data->host = host;
1172 host->can_queue = AHC_MAX_QUEUE;
1173 host->cmd_per_lun = 2;
1174 /* XXX No way to communicate the ID for multiple channels */
1175 host->this_id = ahc->our_id;
1176 host->irq = ahc->platform_data->irq;
1177 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1178 host->max_lun = AHC_NUM_LUNS;
1179 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1180 host->sg_tablesize = AHC_NSEG;
1181 ahc_set_unit(ahc, ahc_linux_next_unit());
1182 sprintf(buf, "scsi%d", host->host_no);
1183 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1184 if (new_name != NULL) {
1185 strcpy(new_name, buf);
1186 ahc_set_name(ahc, new_name);
1187 }
1188 host->unique_id = ahc->unit;
1da177e4 1189 ahc_linux_initialize_scsi_bus(ahc);
1da177e4 1190 ahc_intr_enable(ahc, TRUE);
1da177e4
LT		 1191 ahc_unlock(ahc, &s);
1192
92d161c3 1193 host->transportt = ahc_linux_transport_template;
1194
1da177e4
LT		 1195 scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
1196 scsi_scan_host(host);
1da177e4
LT		 1197 return (0);
1198}
1199
1200uint64_t
1201ahc_linux_get_memsize(void)
1202{
1203 struct sysinfo si;
1204
1205 si_meminfo(&si);
1206 return ((uint64_t)si.totalram << PAGE_SHIFT);
1207}
1208
1209/*
1210 * Find the smallest available unit number to use
1211 * for a new device. We don't just use a static
1212 * count to handle the "repeated hot-(un)plug"
1213 * scenario.
1214 */
1215static int
1216ahc_linux_next_unit(void)
1217{
1218 struct ahc_softc *ahc;
1219 int unit;
1220
1221 unit = 0;
1222retry:
1223 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
1224 if (ahc->unit == unit) {
1225 unit++;
1226 goto retry;
1227 }
1228 }
1229 return (unit);
1230}
1231
1232/*
1233 * Place the SCSI bus into a known state by either resetting it,
1234 * or forcing transfer negotiations on the next command to any
1235 * target.
1236 */
1237void
1238ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1239{
1240 int i;
1241 int numtarg;
1242
1243 i = 0;
1244 numtarg = 0;
1245
1246 if (aic7xxx_no_reset != 0)
1247 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1248
1249 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1250 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1251 else
1252 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1253
1254 if ((ahc->features & AHC_TWIN) != 0) {
1255
1256 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1257 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1258 } else {
1259 if (numtarg == 0)
1260 i = 8;
1261 numtarg += 8;
1262 }
1263 }
1264
1265 /*
1266 * Force negotiation to async for all targets that
1267 * will not see an initial bus reset.
1268 */
1269 for (; i < numtarg; i++) {
1270 struct ahc_devinfo devinfo;
1271 struct ahc_initiator_tinfo *tinfo;
1272 struct ahc_tmode_tstate *tstate;
1273 u_int our_id;
1274 u_int target_id;
1275 char channel;
1276
1277 channel = 'A';
1278 our_id = ahc->our_id;
1279 target_id = i;
1280 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1281 channel = 'B';
1282 our_id = ahc->our_id_b;
1283 target_id = i % 8;
1284 }
1285 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1286 target_id, &tstate);
1287 ahc_compile_devinfo(&devinfo, our_id, target_id,
1288 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1289 ahc_update_neg_request(ahc, &devinfo, tstate,
1290 tinfo, AHC_NEG_ALWAYS);
1291 }
1292 /* Give the bus some time to recover */
1293 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1294 ahc_linux_freeze_simq(ahc);
1295 init_timer(&ahc->platform_data->reset_timer);
1296 ahc->platform_data->reset_timer.data = (u_long)ahc;
1297 ahc->platform_data->reset_timer.expires =
1298 jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
1299 ahc->platform_data->reset_timer.function =
1300 ahc_linux_release_simq;
1301 add_timer(&ahc->platform_data->reset_timer);
1302 }
1303}
1304
1305int
1306ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1307{
1308
1309 ahc->platform_data =
1310 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1311 if (ahc->platform_data == NULL)
1312 return (ENOMEM);
1313 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1da177e4 1314 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1da177e4 1315 ahc_lockinit(ahc);
1da177e4 1316 init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
1da177e4
LT		 1317 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1318 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1319 if (aic7xxx_pci_parity == 0)
1320 ahc->flags |= AHC_DISABLE_PCI_PERR;
1321
1322 return (0);
1323}
1324
1325void
1326ahc_platform_free(struct ahc_softc *ahc)
1327{
b1abb4d6 1328 struct scsi_target *starget;
1da177e4
LT		 1329 int i, j;
1330
1331 if (ahc->platform_data != NULL) {
1da177e4 1332 if (ahc->platform_data->host != NULL) {
1da177e4 1333 scsi_remove_host(ahc->platform_data->host);
1da177e4
LT		 1334 scsi_host_put(ahc->platform_data->host);
1335 }
1336
1337 /* destroy all of the device and target objects */
1338 for (i = 0; i < AHC_NUM_TARGETS; i++) {
b1abb4d6
JB		 1339 starget = ahc->platform_data->starget[i];
1340 if (starget != NULL) {
1da177e4 1341 for (j = 0; j < AHC_NUM_LUNS; j++) {
b1abb4d6
JB		 1342 struct ahc_linux_target *targ =
1343 scsi_transport_target_data(starget);
1da177e4 1344
b1abb4d6 1345 if (targ->sdev[j] == NULL)
1da177e4 1346 continue;
b1abb4d6 1347 targ->sdev[j] = NULL;
1da177e4 1348 }
b1abb4d6 1349 ahc->platform_data->starget[i] = NULL;
1da177e4
LT		 1350 }
1351 }
1352
1353 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1354 free_irq(ahc->platform_data->irq, ahc);
1355 if (ahc->tag == BUS_SPACE_PIO
1356 && ahc->bsh.ioport != 0)
1357 release_region(ahc->bsh.ioport, 256);
1358 if (ahc->tag == BUS_SPACE_MEMIO
1359 && ahc->bsh.maddr != NULL) {
1360 iounmap(ahc->bsh.maddr);
1361 release_mem_region(ahc->platform_data->mem_busaddr,
1362 0x1000);
1363 }
dedd8310 1364
1da177e4
LT		 1365 free(ahc->platform_data, M_DEVBUF);
1366 }
1367}
1368
1369void
1370ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1371{
1372 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1373 SCB_GET_CHANNEL(ahc, scb),
1374 SCB_GET_LUN(scb), SCB_LIST_NULL,
1375 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1376}
1377
1378void
1379ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1380 ahc_queue_alg alg)
1381{
b1abb4d6
JB		 1382 struct scsi_target *starget;
1383 struct ahc_linux_target *targ;
1da177e4 1384 struct ahc_linux_device *dev;
b1abb4d6
JB		 1385 struct scsi_device *sdev;
1386 u_int target_offset;
1da177e4
LT		 1387 int was_queuing;
1388 int now_queuing;
1389
b1abb4d6
JB		 1390 target_offset = devinfo->target;
1391 if (devinfo->channel != 'A')
1392 target_offset += 8;
1393 starget = ahc->platform_data->starget[target_offset];
1394 targ = scsi_transport_target_data(starget);
1395 BUG_ON(targ == NULL);
1396 sdev = targ->sdev[devinfo->lun];
1397 if (sdev == NULL)
1da177e4 1398 return;
b1abb4d6
JB		 1399 dev = scsi_transport_device_data(sdev);
1400
1da177e4
LT		 1401 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1402 switch (alg) {
1403 default:
1404 case AHC_QUEUE_NONE:
1405 now_queuing = 0;
1406 break;
1407 case AHC_QUEUE_BASIC:
1408 now_queuing = AHC_DEV_Q_BASIC;
1409 break;
1410 case AHC_QUEUE_TAGGED:
1411 now_queuing = AHC_DEV_Q_TAGGED;
1412 break;
1413 }
1414 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1415 && (was_queuing != now_queuing)
1416 && (dev->active != 0)) {
1417 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1418 dev->qfrozen++;
1419 }
1420
1421 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1422 if (now_queuing) {
1423 u_int usertags;
1424
1425 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1426 if (!was_queuing) {
1427 /*
1428 * Start out agressively and allow our
1429 * dynamic queue depth algorithm to take
1430 * care of the rest.
1431 */
1432 dev->maxtags = usertags;
1433 dev->openings = dev->maxtags - dev->active;
1434 }
1435 if (dev->maxtags == 0) {
1436 /*
1437 * Queueing is disabled by the user.
1438 */
1439 dev->openings = 1;
1440 } else if (alg == AHC_QUEUE_TAGGED) {
1441 dev->flags |= AHC_DEV_Q_TAGGED;
1442 if (aic7xxx_periodic_otag != 0)
1443 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1444 } else
1445 dev->flags |= AHC_DEV_Q_BASIC;
1446 } else {
1447 /* We can only have one opening. */
1448 dev->maxtags = 0;
1449 dev->openings = 1 - dev->active;
1450 }
b1abb4d6
JB		 1451 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1452 case AHC_DEV_Q_BASIC:
1453 scsi_adjust_queue_depth(sdev,
1454 MSG_SIMPLE_TASK,
1455 dev->openings + dev->active);
1456 break;
1457 case AHC_DEV_Q_TAGGED:
1458 scsi_adjust_queue_depth(sdev,
1459 MSG_ORDERED_TASK,
1460 dev->openings + dev->active);
1461 break;
1462 default:
1463 /*
1464 * We allow the OS to queue 2 untagged transactions to
1465 * us at any time even though we can only execute them
1466 * serially on the controller/device. This should
1467 * remove some latency.
1468 */
1469 scsi_adjust_queue_depth(sdev,
1470 /*NON-TAGGED*/0,
1471 /*queue depth*/2);
1472 break;
1da177e4 1473 }
1da177e4
LT		 1474}
1475
1476int
1477ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1478 int lun, u_int tag, role_t role, uint32_t status)
1479{
e4e360c3 1480 return 0;
1da177e4
LT		 1481}
1482
cb624029 1483static u_int
1484ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1da177e4 1485{
cb624029 1486 static int warned_user;
1487 u_int tags;
1da177e4 1488
cb624029 1489 tags = 0;
1490 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1491 if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
1492 if (warned_user == 0) {
1da177e4 1493
cb624029 1494 printf(KERN_WARNING
1495"aic7xxx: WARNING: Insufficient tag_info instances\n"
1496"aic7xxx: for installed controllers. Using defaults\n"
1497"aic7xxx: Please update the aic7xxx_tag_info array in\n"
1498"aic7xxx: the aic7xxx_osm..c source file.\n");
1499 warned_user++;
1500 }
1501 tags = AHC_MAX_QUEUE;
1502 } else {
1503 adapter_tag_info_t *tag_info;
1da177e4 1504
cb624029 1505 tag_info = &aic7xxx_tag_info[ahc->unit];
1506 tags = tag_info->tag_commands[devinfo->target_offset];
1507 if (tags > AHC_MAX_QUEUE)
1508 tags = AHC_MAX_QUEUE;
1509 }
1da177e4 1510 }
cb624029 1511 return (tags);
1da177e4
LT		 1512}
1513
cb624029 1514/*
1515 * Determines the queue depth for a given device.
1516 */
1da177e4 1517static void
b1abb4d6 1518ahc_linux_device_queue_depth(struct scsi_device *sdev)
1da177e4 1519{
cb624029 1520 struct ahc_devinfo devinfo;
1521 u_int tags;
b1abb4d6 1522 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1da177e4 1523
cb624029 1524 ahc_compile_devinfo(&devinfo,
b1abb4d6 1525 sdev->sdev_target->channel == 0
cb624029 1526 ? ahc->our_id : ahc->our_id_b,
b1abb4d6
JB		 1527 sdev->sdev_target->id, sdev->lun,
1528 sdev->sdev_target->channel == 0 ? 'A' : 'B',
cb624029 1529 ROLE_INITIATOR);
1530 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
b1abb4d6 1531 if (tags != 0 && sdev->tagged_supported != 0) {
1da177e4 1532
cb624029 1533 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
1534 ahc_print_devinfo(ahc, &devinfo);
1535 printf("Tagged Queuing enabled. Depth %d\n", tags);
1da177e4 1536 } else {
cb624029 1537 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
1da177e4
LT		 1538 }
1539}
1540
e4e360c3
JB		 1541static int
1542ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1543 struct scsi_cmnd *cmd)
1da177e4 1544{
cb624029 1545 struct scb *scb;
1546 struct hardware_scb *hscb;
1547 struct ahc_initiator_tinfo *tinfo;
1548 struct ahc_tmode_tstate *tstate;
1549 uint16_t mask;
e4e360c3 1550 struct scb_tailq *untagged_q = NULL;
1da177e4 1551
e4e360c3
JB		 1552 /*
1553 * Schedule us to run later. The only reason we are not
1554 * running is because the whole controller Q is frozen.
1555 */
1556 if (ahc->platform_data->qfrozen != 0)
1557 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1558
e4e360c3
JB		 1559 /*
1560 * We only allow one untagged transaction
1561 * per target in the initiator role unless
1562 * we are storing a full busy target *lun*
1563 * table in SCB space.
1564 */
1565 if (!blk_rq_tagged(cmd->request)
1566 && (ahc->features & AHC_SCB_BTT) == 0) {
1567 int target_offset;
1da177e4 1568
e4e360c3
JB		 1569 target_offset = cmd->device->id + cmd->device->channel * 8;
1570 untagged_q = &(ahc->untagged_queues[target_offset]);
1571 if (!TAILQ_EMPTY(untagged_q))
1572 /* if we're already executing an untagged command
1573 * we're busy to another */
1574 return SCSI_MLQUEUE_DEVICE_BUSY;
1575 }
1576
1577 /*
1578 * Get an scb to use.
1579 */
8eb37942
CH		 1580 scb = ahc_get_scb(ahc);
1581 if (!scb)
1582 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1583
e4e360c3
JB		 1584 scb->io_ctx = cmd;
1585 scb->platform_data->dev = dev;
1586 hscb = scb->hscb;
1587 cmd->host_scribble = (char *)scb;
1da177e4 1588
e4e360c3
JB		 1589 /*
1590 * Fill out basics of the HSCB.
1591 */
1592 hscb->control = 0;
1593 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1594 hscb->lun = cmd->device->lun;
1595 mask = SCB_GET_TARGET_MASK(ahc, scb);
1596 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1597 SCB_GET_OUR_ID(scb),
1598 SCB_GET_TARGET(ahc, scb), &tstate);
1599 hscb->scsirate = tinfo->scsirate;
1600 hscb->scsioffset = tinfo->curr.offset;
1601 if ((tstate->ultraenb & mask) != 0)
1602 hscb->control |= ULTRAENB;
1603
1604 if ((ahc->user_discenable & mask) != 0)
1605 hscb->control |= DISCENB;
1606
1607 if ((tstate->auto_negotiate & mask) != 0) {
1608 scb->flags |= SCB_AUTO_NEGOTIATE;
1609 scb->hscb->control |= MK_MESSAGE;
1610 }
1611
1612 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
e4e360c3
JB		 1613 int msg_bytes;
1614 uint8_t tag_msgs[2];
1615
1616 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1617 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1618 hscb->control |= tag_msgs[0];
1619 if (tag_msgs[0] == MSG_ORDERED_TASK)
cb624029 1620 dev->commands_since_idle_or_otag = 0;
dedd8310
CH		 1621 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1622 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
e4e360c3
JB		 1623 hscb->control |= MSG_ORDERED_TASK;
1624 dev->commands_since_idle_or_otag = 0;
cb624029 1625 } else {
e4e360c3 1626 hscb->control |= MSG_SIMPLE_TASK;
cb624029 1627 }
e4e360c3 1628 }
1da177e4 1629
e4e360c3
JB		 1630 hscb->cdb_len = cmd->cmd_len;
1631 if (hscb->cdb_len <= 12) {
1632 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1633 } else {
1634 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1635 scb->flags |= SCB_CDB32_PTR;
1636 }
1da177e4 1637
e4e360c3
JB		 1638 scb->platform_data->xfer_len = 0;
1639 ahc_set_residual(scb, 0);
1640 ahc_set_sense_residual(scb, 0);
1641 scb->sg_count = 0;
1642 if (cmd->use_sg != 0) {
1643 struct ahc_dma_seg *sg;
1644 struct scatterlist *cur_seg;
1645 struct scatterlist *end_seg;
1646 int nseg;
1647
1648 cur_seg = (struct scatterlist *)cmd->request_buffer;
1649 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
1650 cmd->sc_data_direction);
1651 end_seg = cur_seg + nseg;
1652 /* Copy the segments into the SG list. */
1653 sg = scb->sg_list;
1654 /*
1655 * The sg_count may be larger than nseg if
1656 * a transfer crosses a 32bit page.
1657 */
1658 while (cur_seg < end_seg) {
1da177e4 1659 dma_addr_t addr;
e4e360c3
JB		 1660 bus_size_t len;
1661 int consumed;
1662
1663 addr = sg_dma_address(cur_seg);
1664 len = sg_dma_len(cur_seg);
1665 consumed = ahc_linux_map_seg(ahc, scb,
1666 sg, addr, len);
1667 sg += consumed;
1668 scb->sg_count += consumed;
1669 cur_seg++;
1da177e4 1670 }
e4e360c3
JB		 1671 sg--;
1672 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4 1673
e4e360c3
JB		 1674 /*
1675 * Reset the sg list pointer.
1676 */
1677 scb->hscb->sgptr =
1678 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1679
1680 /*
1681 * Copy the first SG into the "current"
1682 * data pointer area.
1683 */
1684 scb->hscb->dataptr = scb->sg_list->addr;
1685 scb->hscb->datacnt = scb->sg_list->len;
1686 } else if (cmd->request_bufflen != 0) {
1687 struct ahc_dma_seg *sg;
1688 dma_addr_t addr;
1689
1690 sg = scb->sg_list;
1691 addr = pci_map_single(ahc->dev_softc,
1692 cmd->request_buffer,
1693 cmd->request_bufflen,
1694 cmd->sc_data_direction);
1695 scb->platform_data->buf_busaddr = addr;
1696 scb->sg_count = ahc_linux_map_seg(ahc, scb,
1697 sg, addr,
1698 cmd->request_bufflen);
1699 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4
LT		 1700
1701 /*
e4e360c3 1702 * Reset the sg list pointer.
1da177e4 1703 */
e4e360c3
JB		 1704 scb->hscb->sgptr =
1705 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1706
1707 /*
1708 * Copy the first SG into the "current"
1709 * data pointer area.
1710 */
1711 scb->hscb->dataptr = sg->addr;
1712 scb->hscb->datacnt = sg->len;
1713 } else {
1714 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1715 scb->hscb->dataptr = 0;
1716 scb->hscb->datacnt = 0;
1717 scb->sg_count = 0;
1718 }
1719
1720 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1721 dev->openings--;
1722 dev->active++;
1723 dev->commands_issued++;
1724 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1725 dev->commands_since_idle_or_otag++;
1726
1727 scb->flags |= SCB_ACTIVE;
1728 if (untagged_q) {
1729 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1730 scb->flags |= SCB_UNTAGGEDQ;
1da177e4 1731 }
e4e360c3
JB		 1732 ahc_queue_scb(ahc, scb);
1733 return 0;
1da177e4
LT		 1734}
1735
1736/*
1737 * SCSI controller interrupt handler.
1738 */
1739irqreturn_t
1740ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1741{
1742 struct ahc_softc *ahc;
1743 u_long flags;
1744 int ours;
1745
1746 ahc = (struct ahc_softc *) dev_id;
1747 ahc_lock(ahc, &flags);
1748 ours = ahc_intr(ahc);
1da177e4
LT		 1749 ahc_unlock(ahc, &flags);
1750 return IRQ_RETVAL(ours);
1751}
1752
1753void
1754ahc_platform_flushwork(struct ahc_softc *ahc)
1755{
1756
1da177e4
LT		 1757}
1758
1da177e4
LT		 1759void
1760ahc_send_async(struct ahc_softc *ahc, char channel,
1761 u_int target, u_int lun, ac_code code, void *arg)
1762{
1763 switch (code) {
1764 case AC_TRANSFER_NEG:
1765 {
1766 char buf[80];
b1abb4d6 1767 struct scsi_target *starget;
1da177e4
LT		 1768 struct ahc_linux_target *targ;
1769 struct info_str info;
1770 struct ahc_initiator_tinfo *tinfo;
1771 struct ahc_tmode_tstate *tstate;
1772 int target_offset;
b1abb4d6
JB		 1773 unsigned int target_ppr_options;
1774
1775 BUG_ON(target == CAM_TARGET_WILDCARD);
1da177e4
LT		 1776
1777 info.buffer = buf;
1778 info.length = sizeof(buf);
1779 info.offset = 0;
1780 info.pos = 0;
1781 tinfo = ahc_fetch_transinfo(ahc, channel,
1782 channel == 'A' ? ahc->our_id
1783 : ahc->our_id_b,
1784 target, &tstate);
1785
1786 /*
1787 * Don't bother reporting results while
1788 * negotiations are still pending.
1789 */
1790 if (tinfo->curr.period != tinfo->goal.period
1791 || tinfo->curr.width != tinfo->goal.width
1792 || tinfo->curr.offset != tinfo->goal.offset
1793 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1794 if (bootverbose == 0)
1795 break;
1796
1797 /*
1798 * Don't bother reporting results that
1799 * are identical to those last reported.
1800 */
1801 target_offset = target;
1802 if (channel == 'B')
1803 target_offset += 8;
b1abb4d6
JB		 1804 starget = ahc->platform_data->starget[target_offset];
1805 targ = scsi_transport_target_data(starget);
1da177e4
LT		 1806 if (targ == NULL)
1807 break;
b1abb4d6
JB		 1808
1809 target_ppr_options =
1810 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1811 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1812 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1813
1814 if (tinfo->curr.period == spi_period(starget)
1815 && tinfo->curr.width == spi_width(starget)
1816 && tinfo->curr.offset == spi_offset(starget)
1817 && tinfo->curr.ppr_options == target_ppr_options)
1da177e4
LT		 1818 if (bootverbose == 0)
1819 break;
1820
b1abb4d6
JB		 1821 spi_period(starget) = tinfo->curr.period;
1822 spi_width(starget) = tinfo->curr.width;
1823 spi_offset(starget) = tinfo->curr.offset;
1824 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ;
1825 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ;
1826 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ;
1827 spi_display_xfer_agreement(starget);
1da177e4
LT		 1828 break;
1829 }
1830 case AC_SENT_BDR:
1831 {
1da177e4
LT		 1832 WARN_ON(lun != CAM_LUN_WILDCARD);
1833 scsi_report_device_reset(ahc->platform_data->host,
1834 channel - 'A', target);
1da177e4
LT		 1835 break;
1836 }
1837 case AC_BUS_RESET:
1838 if (ahc->platform_data->host != NULL) {
1839 scsi_report_bus_reset(ahc->platform_data->host,
1840 channel - 'A');
1841 }
1842 break;
1843 default:
1844 panic("ahc_send_async: Unexpected async event");
1845 }
1846}
1847
1848/*
1849 * Calls the higher level scsi done function and frees the scb.
1850 */
1851void
1852ahc_done(struct ahc_softc *ahc, struct scb *scb)
1853{
013791ee 1854 struct scsi_cmnd *cmd;
1da177e4
LT		 1855 struct ahc_linux_device *dev;
1856
1857 LIST_REMOVE(scb, pending_links);
1858 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1859 struct scb_tailq *untagged_q;
1860 int target_offset;
1861
1862 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1863 untagged_q = &(ahc->untagged_queues[target_offset]);
1864 TAILQ_REMOVE(untagged_q, scb, links.tqe);
e4e360c3 1865 BUG_ON(!TAILQ_EMPTY(untagged_q));
1da177e4
LT		 1866 }
1867
1868 if ((scb->flags & SCB_ACTIVE) == 0) {
1869 printf("SCB %d done'd twice\n", scb->hscb->tag);
1870 ahc_dump_card_state(ahc);
1871 panic("Stopping for safety");
1872 }
1873 cmd = scb->io_ctx;
1874 dev = scb->platform_data->dev;
1875 dev->active--;
1876 dev->openings++;
1877 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1878 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1879 dev->qfrozen--;
1880 }
1881 ahc_linux_unmap_scb(ahc, scb);
1882
1883 /*
1884 * Guard against stale sense data.
1885 * The Linux mid-layer assumes that sense
1886 * was retrieved anytime the first byte of
1887 * the sense buffer looks "sane".
1888 */
1889 cmd->sense_buffer[0] = 0;
1890 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1891 uint32_t amount_xferred;
1892
1893 amount_xferred =
1894 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1895 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1896#ifdef AHC_DEBUG
1897 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1898 ahc_print_path(ahc, scb);
1899 printf("Set CAM_UNCOR_PARITY\n");
1900 }
1901#endif
1902 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1903#ifdef AHC_REPORT_UNDERFLOWS
1904 /*
1905 * This code is disabled by default as some
1906 * clients of the SCSI system do not properly
1907 * initialize the underflow parameter. This
1908 * results in spurious termination of commands
1909 * that complete as expected (e.g. underflow is
1910 * allowed as command can return variable amounts
1911 * of data.
1912 */
1913 } else if (amount_xferred < scb->io_ctx->underflow) {
1914 u_int i;
1915
1916 ahc_print_path(ahc, scb);
1917 printf("CDB:");
1918 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1919 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1920 printf("\n");
1921 ahc_print_path(ahc, scb);
1922 printf("Saw underflow (%ld of %ld bytes). "
1923 "Treated as error\n",
1924 ahc_get_residual(scb),
1925 ahc_get_transfer_length(scb));
1926 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1927#endif
1928 } else {
1929 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1930 }
1931 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
b1abb4d6 1932 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1da177e4 1933 }
1da177e4
LT		 1934
1935 if (dev->openings == 1
1936 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1937 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1938 dev->tag_success_count++;
1939 /*
1940 * Some devices deal with temporary internal resource
1941 * shortages by returning queue full. When the queue
1942 * full occurrs, we throttle back. Slowly try to get
1943 * back to our previous queue depth.
1944 */
1945 if ((dev->openings + dev->active) < dev->maxtags
1946 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1947 dev->tag_success_count = 0;
1948 dev->openings++;
1949 }
1950
1951 if (dev->active == 0)
1952 dev->commands_since_idle_or_otag = 0;
1953
1da177e4
LT		 1954 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1955 printf("Recovery SCB completes\n");
1956 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1957 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1958 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1959 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
1960 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
1961 up(&ahc->platform_data->eh_sem);
1962 }
1963 }
1964
1965 ahc_free_scb(ahc, scb);
1966 ahc_linux_queue_cmd_complete(ahc, cmd);
1da177e4
LT		 1967}
1968
1969static void
1970ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
b1abb4d6 1971 struct scsi_device *sdev, struct scb *scb)
1da177e4
LT		 1972{
1973 struct ahc_devinfo devinfo;
b1abb4d6 1974 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1da177e4
LT		 1975
1976 ahc_compile_devinfo(&devinfo,
1977 ahc->our_id,
b1abb4d6
JB		 1978 sdev->sdev_target->id, sdev->lun,
1979 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1da177e4
LT		 1980 ROLE_INITIATOR);
1981
1982 /*
1983 * We don't currently trust the mid-layer to
1984 * properly deal with queue full or busy. So,
1985 * when one occurs, we tell the mid-layer to
1986 * unconditionally requeue the command to us
1987 * so that we can retry it ourselves. We also
1988 * implement our own throttling mechanism so
1989 * we don't clobber the device with too many
1990 * commands.
1991 */
1992 switch (ahc_get_scsi_status(scb)) {
1993 default:
1994 break;
1995 case SCSI_STATUS_CHECK_COND:
1996 case SCSI_STATUS_CMD_TERMINATED:
1997 {
013791ee 1998 struct scsi_cmnd *cmd;
1da177e4
LT		 1999
2000 /*
2001 * Copy sense information to the OS's cmd
2002 * structure if it is available.
2003 */
2004 cmd = scb->io_ctx;
2005 if (scb->flags & SCB_SENSE) {
2006 u_int sense_size;
2007
2008 sense_size = MIN(sizeof(struct scsi_sense_data)
2009 - ahc_get_sense_residual(scb),
2010 sizeof(cmd->sense_buffer));
2011 memcpy(cmd->sense_buffer,
2012 ahc_get_sense_buf(ahc, scb), sense_size);
2013 if (sense_size < sizeof(cmd->sense_buffer))
2014 memset(&cmd->sense_buffer[sense_size], 0,
2015 sizeof(cmd->sense_buffer) - sense_size);
2016 cmd->result |= (DRIVER_SENSE << 24);
2017#ifdef AHC_DEBUG
2018 if (ahc_debug & AHC_SHOW_SENSE) {
2019 int i;
2020
2021 printf("Copied %d bytes of sense data:",
2022 sense_size);
2023 for (i = 0; i < sense_size; i++) {
2024 if ((i & 0xF) == 0)
2025 printf("\n");
2026 printf("0x%x ", cmd->sense_buffer[i]);
2027 }
2028 printf("\n");
2029 }
2030#endif
2031 }
2032 break;
2033 }
2034 case SCSI_STATUS_QUEUE_FULL:
2035 {
2036 /*
2037 * By the time the core driver has returned this
2038 * command, all other commands that were queued
2039 * to us but not the device have been returned.
2040 * This ensures that dev->active is equal to
2041 * the number of commands actually queued to
2042 * the device.
2043 */
2044 dev->tag_success_count = 0;
2045 if (dev->active != 0) {
2046 /*
2047 * Drop our opening count to the number
2048 * of commands currently outstanding.
2049 */
2050 dev->openings = 0;
2051/*
2052 ahc_print_path(ahc, scb);
2053 printf("Dropping tag count to %d\n", dev->active);
2054 */
2055 if (dev->active == dev->tags_on_last_queuefull) {
2056
2057 dev->last_queuefull_same_count++;
2058 /*
2059 * If we repeatedly see a queue full
2060 * at the same queue depth, this
2061 * device has a fixed number of tag
2062 * slots. Lock in this tag depth
2063 * so we stop seeing queue fulls from
2064 * this device.
2065 */
2066 if (dev->last_queuefull_same_count
2067 == AHC_LOCK_TAGS_COUNT) {
2068 dev->maxtags = dev->active;
2069 ahc_print_path(ahc, scb);
2070 printf("Locking max tag count at %d\n",
2071 dev->active);
2072 }
2073 } else {
2074 dev->tags_on_last_queuefull = dev->active;
2075 dev->last_queuefull_same_count = 0;
2076 }
2077 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
2078 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
2079 ahc_platform_set_tags(ahc, &devinfo,
2080 (dev->flags & AHC_DEV_Q_BASIC)
2081 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
2082 break;
2083 }
2084 /*
2085 * Drop down to a single opening, and treat this
2086 * as if the target returned BUSY SCSI status.
2087 */
2088 dev->openings = 1;
2089 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
2090 ahc_platform_set_tags(ahc, &devinfo,
2091 (dev->flags & AHC_DEV_Q_BASIC)
2092 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1da177e4
LT		 2093 break;
2094 }
2095 }
2096}
2097
2098static void
013791ee 2099ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1da177e4 2100{
1da177e4
LT		 2101 /*
2102 * Map CAM error codes into Linux Error codes. We
2103 * avoid the conversion so that the DV code has the
2104 * full error information available when making
2105 * state change decisions.
2106 */
cb624029 2107 {
1da177e4
LT		 2108 u_int new_status;
2109
2110 switch (ahc_cmd_get_transaction_status(cmd)) {
2111 case CAM_REQ_INPROG:
2112 case CAM_REQ_CMP:
2113 case CAM_SCSI_STATUS_ERROR:
2114 new_status = DID_OK;
2115 break;
2116 case CAM_REQ_ABORTED:
2117 new_status = DID_ABORT;
2118 break;
2119 case CAM_BUSY:
2120 new_status = DID_BUS_BUSY;
2121 break;
2122 case CAM_REQ_INVALID:
2123 case CAM_PATH_INVALID:
2124 new_status = DID_BAD_TARGET;
2125 break;
2126 case CAM_SEL_TIMEOUT:
2127 new_status = DID_NO_CONNECT;
2128 break;
2129 case CAM_SCSI_BUS_RESET:
2130 case CAM_BDR_SENT:
2131 new_status = DID_RESET;
2132 break;
2133 case CAM_UNCOR_PARITY:
2134 new_status = DID_PARITY;
2135 break;
2136 case CAM_CMD_TIMEOUT:
2137 new_status = DID_TIME_OUT;
2138 break;
2139 case CAM_UA_ABORT:
2140 case CAM_REQ_CMP_ERR:
2141 case CAM_AUTOSENSE_FAIL:
2142 case CAM_NO_HBA:
2143 case CAM_DATA_RUN_ERR:
2144 case CAM_UNEXP_BUSFREE:
2145 case CAM_SEQUENCE_FAIL:
2146 case CAM_CCB_LEN_ERR:
2147 case CAM_PROVIDE_FAIL:
2148 case CAM_REQ_TERMIO:
2149 case CAM_UNREC_HBA_ERROR:
2150 case CAM_REQ_TOO_BIG:
2151 new_status = DID_ERROR;
2152 break;
2153 case CAM_REQUEUE_REQ:
8e45ebcc 2154 new_status = DID_REQUEUE;
1da177e4
LT		 2155 break;
2156 default:
2157 /* We should never get here */
2158 new_status = DID_ERROR;
2159 break;
2160 }
2161
2162 ahc_cmd_set_transaction_status(cmd, new_status);
2163 }
2164
8e45ebcc 2165 cmd->scsi_done(cmd);
1da177e4
LT		 2166}
2167
1da177e4
LT		 2168static void
2169ahc_linux_sem_timeout(u_long arg)
2170{
2171 struct ahc_softc *ahc;
2172 u_long s;
2173
2174 ahc = (struct ahc_softc *)arg;
2175
2176 ahc_lock(ahc, &s);
2177 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2178 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2179 up(&ahc->platform_data->eh_sem);
2180 }
2181 ahc_unlock(ahc, &s);
2182}
2183
2184static void
2185ahc_linux_freeze_simq(struct ahc_softc *ahc)
2186{
2187 ahc->platform_data->qfrozen++;
2188 if (ahc->platform_data->qfrozen == 1) {
2189 scsi_block_requests(ahc->platform_data->host);
2190
2191 /* XXX What about Twin channels? */
2192 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2193 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2194 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2195 }
2196}
2197
2198static void
2199ahc_linux_release_simq(u_long arg)
2200{
2201 struct ahc_softc *ahc;
2202 u_long s;
2203 int unblock_reqs;
2204
2205 ahc = (struct ahc_softc *)arg;
2206
2207 unblock_reqs = 0;
2208 ahc_lock(ahc, &s);
2209 if (ahc->platform_data->qfrozen > 0)
2210 ahc->platform_data->qfrozen--;
2211 if (ahc->platform_data->qfrozen == 0)
2212 unblock_reqs = 1;
1da177e4
LT		 2213 ahc_unlock(ahc, &s);
2214 /*
2215 * There is still a race here. The mid-layer
2216 * should keep its own freeze count and use
2217 * a bottom half handler to run the queues
2218 * so we can unblock with our own lock held.
2219 */
2220 if (unblock_reqs)
2221 scsi_unblock_requests(ahc->platform_data->host);
2222}
2223
1da177e4 2224static int
013791ee 2225ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
1da177e4
LT		 2226{
2227 struct ahc_softc *ahc;
1da177e4
LT		 2228 struct ahc_linux_device *dev;
2229 struct scb *pending_scb;
1da177e4
LT		 2230 u_int saved_scbptr;
2231 u_int active_scb_index;
2232 u_int last_phase;
2233 u_int saved_scsiid;
2234 u_int cdb_byte;
2235 int retval;
2236 int was_paused;
2237 int paused;
2238 int wait;
2239 int disconnected;
2240
2241 pending_scb = NULL;
2242 paused = FALSE;
2243 wait = FALSE;
2244 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
1da177e4
LT		 2245
2246 printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
2247 ahc_name(ahc), cmd->device->channel,
2248 cmd->device->id, cmd->device->lun,
2249 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2250
2251 printf("CDB:");
2252 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2253 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2254 printf("\n");
2255
8fa728a2
JG		 2256 spin_lock_irq(&ahc->platform_data->spin_lock);
2257
1da177e4
LT		 2258 /*
2259 * First determine if we currently own this command.
2260 * Start by searching the device queue. If not found
2261 * there, check the pending_scb list. If not found
2262 * at all, and the system wanted us to just abort the
2263 * command, return success.
2264 */
b1abb4d6 2265 dev = scsi_transport_device_data(cmd->device);
1da177e4
LT		 2266
2267 if (dev == NULL) {
2268 /*
2269 * No target device for this command exists,
2270 * so we must not still own the command.
2271 */
2272 printf("%s:%d:%d:%d: Is not an active device\n",
2273 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2274 cmd->device->lun);
2275 retval = SUCCESS;
2276 goto no_cmd;
2277 }
2278
1da177e4
LT		 2279 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2280 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2281 cmd->device->channel + 'A',
2282 cmd->device->lun,
2283 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2284 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2285 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2286 cmd->device->lun);
2287 retval = SUCCESS;
2288 goto done;
2289 }
2290
2291 /*
2292 * See if we can find a matching cmd in the pending list.
2293 */
2294 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2295 if (pending_scb->io_ctx == cmd)
2296 break;
2297 }
2298
2299 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2300
2301 /* Any SCB for this device will do for a target reset */
2302 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2303 if (ahc_match_scb(ahc, pending_scb, cmd->device->id,
2304 cmd->device->channel + 'A',
2305 CAM_LUN_WILDCARD,
2306 SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2307 break;
2308 }
2309 }
2310
2311 if (pending_scb == NULL) {
2312 printf("%s:%d:%d:%d: Command not found\n",
2313 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2314 cmd->device->lun);
2315 goto no_cmd;
2316 }
2317
2318 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2319 /*
2320 * We can't queue two recovery actions using the same SCB
2321 */
2322 retval = FAILED;
2323 goto done;
2324 }
2325
2326 /*
2327 * Ensure that the card doesn't do anything
2328 * behind our back and that we didn't "just" miss
2329 * an interrupt that would affect this cmd.
2330 */
2331 was_paused = ahc_is_paused(ahc);
2332 ahc_pause_and_flushwork(ahc);
2333 paused = TRUE;
2334
2335 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2336 printf("%s:%d:%d:%d: Command already completed\n",
2337 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2338 cmd->device->lun);
2339 goto no_cmd;
2340 }
2341
2342 printf("%s: At time of recovery, card was %spaused\n",
2343 ahc_name(ahc), was_paused ? "" : "not ");
2344 ahc_dump_card_state(ahc);
2345
2346 disconnected = TRUE;
2347 if (flag == SCB_ABORT) {
2348 if (ahc_search_qinfifo(ahc, cmd->device->id,
2349 cmd->device->channel + 'A',
2350 cmd->device->lun,
2351 pending_scb->hscb->tag,
2352 ROLE_INITIATOR, CAM_REQ_ABORTED,
2353 SEARCH_COMPLETE) > 0) {
2354 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2355 ahc_name(ahc), cmd->device->channel,
2356 cmd->device->id, cmd->device->lun);
2357 retval = SUCCESS;
2358 goto done;
2359 }
2360 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2361 cmd->device->channel + 'A',
2362 cmd->device->lun, pending_scb->hscb->tag,
2363 ROLE_INITIATOR, /*status*/0,
2364 SEARCH_COUNT) > 0) {
2365 disconnected = FALSE;
2366 }
2367
2368 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2369 struct scb *bus_scb;
2370
2371 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2372 if (bus_scb == pending_scb)
2373 disconnected = FALSE;
2374 else if (flag != SCB_ABORT
2375 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2376 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2377 disconnected = FALSE;
2378 }
2379
2380 /*
2381 * At this point, pending_scb is the scb associated with the
2382 * passed in command. That command is currently active on the
2383 * bus, is in the disconnected state, or we're hoping to find
2384 * a command for the same target active on the bus to abuse to
2385 * send a BDR. Queue the appropriate message based on which of
2386 * these states we are in.
2387 */
2388 last_phase = ahc_inb(ahc, LASTPHASE);
2389 saved_scbptr = ahc_inb(ahc, SCBPTR);
2390 active_scb_index = ahc_inb(ahc, SCB_TAG);
2391 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2392 if (last_phase != P_BUSFREE
2393 && (pending_scb->hscb->tag == active_scb_index
2394 || (flag == SCB_DEVICE_RESET
2395 && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) {
2396
2397 /*
2398 * We're active on the bus, so assert ATN
2399 * and hope that the target responds.
2400 */
2401 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2402 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2403 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2404 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2405 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
2406 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2407 cmd->device->lun);
2408 wait = TRUE;
2409 } else if (disconnected) {
2410
2411 /*
2412 * Actually re-queue this SCB in an attempt
2413 * to select the device before it reconnects.
2414 * In either case (selection or reselection),
2415 * we will now issue the approprate message
2416 * to the timed-out device.
2417 *
2418 * Set the MK_MESSAGE control bit indicating
2419 * that we desire to send a message. We
2420 * also set the disconnected flag since
2421 * in the paging case there is no guarantee
2422 * that our SCB control byte matches the
2423 * version on the card. We don't want the
2424 * sequencer to abort the command thinking
2425 * an unsolicited reselection occurred.
2426 */
2427 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2428 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2429
2430 /*
2431 * Remove any cached copy of this SCB in the
2432 * disconnected list in preparation for the
2433 * queuing of our abort SCB. We use the
2434 * same element in the SCB, SCB_NEXT, for
2435 * both the qinfifo and the disconnected list.
2436 */
2437 ahc_search_disc_list(ahc, cmd->device->id,
2438 cmd->device->channel + 'A',
2439 cmd->device->lun, pending_scb->hscb->tag,
2440 /*stop_on_first*/TRUE,
2441 /*remove*/TRUE,
2442 /*save_state*/FALSE);
2443
2444 /*
2445 * In the non-paging case, the sequencer will
2446 * never re-reference the in-core SCB.
2447 * To make sure we are notified during
2448 * reslection, set the MK_MESSAGE flag in
2449 * the card's copy of the SCB.
2450 */
2451 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2452 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2453 ahc_outb(ahc, SCB_CONTROL,
2454 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2455 }
2456
2457 /*
2458 * Clear out any entries in the QINFIFO first
2459 * so we are the next SCB for this target
2460 * to run.
2461 */
2462 ahc_search_qinfifo(ahc, cmd->device->id,
2463 cmd->device->channel + 'A',
2464 cmd->device->lun, SCB_LIST_NULL,
2465 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2466 SEARCH_COMPLETE);
2467 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2468 ahc_outb(ahc, SCBPTR, saved_scbptr);
2469 ahc_print_path(ahc, pending_scb);
2470 printf("Device is disconnected, re-queuing SCB\n");
2471 wait = TRUE;
2472 } else {
2473 printf("%s:%d:%d:%d: Unable to deliver message\n",
2474 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2475 cmd->device->lun);
2476 retval = FAILED;
2477 goto done;
2478 }
2479
2480no_cmd:
2481 /*
2482 * Our assumption is that if we don't have the command, no
2483 * recovery action was required, so we return success. Again,
2484 * the semantics of the mid-layer recovery engine are not
2485 * well defined, so this may change in time.
2486 */
2487 retval = SUCCESS;
2488done:
2489 if (paused)
2490 ahc_unpause(ahc);
2491 if (wait) {
2492 struct timer_list timer;
2493 int ret;
2494
2495 ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
2496 spin_unlock_irq(&ahc->platform_data->spin_lock);
2497 init_timer(&timer);
2498 timer.data = (u_long)ahc;
2499 timer.expires = jiffies + (5 * HZ);
2500 timer.function = ahc_linux_sem_timeout;
2501 add_timer(&timer);
2502 printf("Recovery code sleeping\n");
2503 down(&ahc->platform_data->eh_sem);
2504 printf("Recovery code awake\n");
2505 ret = del_timer_sync(&timer);
2506 if (ret == 0) {
2507 printf("Timer Expired\n");
2508 retval = FAILED;
2509 }
2510 spin_lock_irq(&ahc->platform_data->spin_lock);
2511 }
8fa728a2
JG		 2512
2513 spin_unlock_irq(&ahc->platform_data->spin_lock);
1da177e4
LT		 2514 return (retval);
2515}
2516
2517void
2518ahc_platform_dump_card_state(struct ahc_softc *ahc)
2519{
1da177e4
LT		 2520}
2521
2522static void ahc_linux_exit(void);
2523
fad01ef8
JB		 2524static void ahc_linux_set_width(struct scsi_target *starget, int width)
2525{
2526 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2527 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2528 struct ahc_devinfo devinfo;
2529 unsigned long flags;
2530
2531 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2532 starget->channel + 'A', ROLE_INITIATOR);
2533 ahc_lock(ahc, &flags);
2534 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2535 ahc_unlock(ahc, &flags);
2536}
2537
92d161c3 2538static void ahc_linux_set_period(struct scsi_target *starget, int period)
2539{
2540 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2541 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2542 struct ahc_tmode_tstate *tstate;
2543 struct ahc_initiator_tinfo *tinfo
2544 = ahc_fetch_transinfo(ahc,
2545 starget->channel + 'A',
2546 shost->this_id, starget->id, &tstate);
2547 struct ahc_devinfo devinfo;
597487b9 2548 unsigned int ppr_options = tinfo->goal.ppr_options;
92d161c3 2549 unsigned long flags;
597487b9 2550 unsigned long offset = tinfo->goal.offset;
92d161c3 2551 struct ahc_syncrate *syncrate;
2552
2553 if (offset == 0)
2554 offset = MAX_OFFSET;
2555
2bf2c568
JB		 2556 if (period < 9)
2557 period = 9; /* 12.5ns is our minimum */
2558 if (period == 9)
2559 ppr_options |= MSG_EXT_PPR_DT_REQ;
2560
92d161c3 2561 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2562 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8
JB		 2563
2564 /* all PPR requests apart from QAS require wide transfers */
2565 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
fad01ef8
JB		 2566 if (spi_width(starget) == 0)
2567 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2568 }
2569
92d161c3 2570 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2571 ahc_lock(ahc, &flags);
2572 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2573 ppr_options, AHC_TRANS_GOAL, FALSE);
2574 ahc_unlock(ahc, &flags);
2575}
2576
92d161c3 2577static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2578{
2579 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2580 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2581 struct ahc_tmode_tstate *tstate;
2582 struct ahc_initiator_tinfo *tinfo
2583 = ahc_fetch_transinfo(ahc,
2584 starget->channel + 'A',
2585 shost->this_id, starget->id, &tstate);
2586 struct ahc_devinfo devinfo;
2587 unsigned int ppr_options = 0;
2588 unsigned int period = 0;
2589 unsigned long flags;
2590 struct ahc_syncrate *syncrate = NULL;
2591
2592 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2593 starget->channel + 'A', ROLE_INITIATOR);
2594 if (offset != 0) {
2595 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
597487b9
JB		 2596 period = tinfo->goal.period;
2597 ppr_options = tinfo->goal.ppr_options;
92d161c3 2598 }
2599 ahc_lock(ahc, &flags);
2600 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2601 ppr_options, AHC_TRANS_GOAL, FALSE);
2602 ahc_unlock(ahc, &flags);
2603}
2604
92d161c3 2605static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2606{
2607 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2608 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2609 struct ahc_tmode_tstate *tstate;
2610 struct ahc_initiator_tinfo *tinfo
2611 = ahc_fetch_transinfo(ahc,
2612 starget->channel + 'A',
2613 shost->this_id, starget->id, &tstate);
2614 struct ahc_devinfo devinfo;
597487b9 2615 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2616 & ~MSG_EXT_PPR_DT_REQ;
597487b9 2617 unsigned int period = tinfo->goal.period;
92d161c3 2618 unsigned long flags;
2619 struct ahc_syncrate *syncrate;
2620
2bf2c568
JB		 2621 if (dt) {
2622 period = 9; /* 12.5ns is the only period valid for DT */
2623 ppr_options |= MSG_EXT_PPR_DT_REQ;
2624 } else if (period == 9)
2625 period = 10; /* if resetting DT, period must be >= 25ns */
2626
92d161c3 2627 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2628 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2629 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
92d161c3 2630 ahc_lock(ahc, &flags);
597487b9 2631 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3 2632 ppr_options, AHC_TRANS_GOAL, FALSE);
2633 ahc_unlock(ahc, &flags);
2634}
2635
92d161c3 2636static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2637{
2638 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2639 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2640 struct ahc_tmode_tstate *tstate;
2641 struct ahc_initiator_tinfo *tinfo
2642 = ahc_fetch_transinfo(ahc,
2643 starget->channel + 'A',
2644 shost->this_id, starget->id, &tstate);
2645 struct ahc_devinfo devinfo;
597487b9 2646 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2647 & ~MSG_EXT_PPR_QAS_REQ;
597487b9 2648 unsigned int period = tinfo->goal.period;
92d161c3 2649 unsigned long flags;
2650 struct ahc_syncrate *syncrate;
2651
2652 if (qas)
2653 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2654
2655 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2656 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2657 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2658 ahc_lock(ahc, &flags);
597487b9 2659 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3 2660 ppr_options, AHC_TRANS_GOAL, FALSE);
2661 ahc_unlock(ahc, &flags);
2662}
2663
92d161c3 2664static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2665{
2666 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2667 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2668 struct ahc_tmode_tstate *tstate;
2669 struct ahc_initiator_tinfo *tinfo
2670 = ahc_fetch_transinfo(ahc,
2671 starget->channel + 'A',
2672 shost->this_id, starget->id, &tstate);
2673 struct ahc_devinfo devinfo;
597487b9 2674 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2675 & ~MSG_EXT_PPR_IU_REQ;
597487b9 2676 unsigned int period = tinfo->goal.period;
92d161c3 2677 unsigned long flags;
2678 struct ahc_syncrate *syncrate;
2679
2680 if (iu)
2681 ppr_options |= MSG_EXT_PPR_IU_REQ;
2682
2683 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2684 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2685 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2686 ahc_lock(ahc, &flags);
597487b9 2687 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3 2688 ppr_options, AHC_TRANS_GOAL, FALSE);
2689 ahc_unlock(ahc, &flags);
2690}
2691
2692static struct spi_function_template ahc_linux_transport_functions = {
92d161c3 2693 .set_offset = ahc_linux_set_offset,
2694 .show_offset = 1,
92d161c3 2695 .set_period = ahc_linux_set_period,
2696 .show_period = 1,
92d161c3 2697 .set_width = ahc_linux_set_width,
2698 .show_width = 1,
92d161c3 2699 .set_dt = ahc_linux_set_dt,
2700 .show_dt = 1,
92d161c3 2701 .set_iu = ahc_linux_set_iu,
2702 .show_iu = 1,
92d161c3 2703 .set_qas = ahc_linux_set_qas,
2704 .show_qas = 1,
2705};
2706
2707
2708
1da177e4
LT		 2709static int __init
2710ahc_linux_init(void)
2711{
92d161c3 2712 ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions);
2713 if (!ahc_linux_transport_template)
2714 return -ENODEV;
b1abb4d6
JB		 2715 scsi_transport_reserve_target(ahc_linux_transport_template,
2716 sizeof(struct ahc_linux_target));
2717 scsi_transport_reserve_device(ahc_linux_transport_template,
2718 sizeof(struct ahc_linux_device));
858eaca1
JB		 2719 if (ahc_linux_detect(&aic7xxx_driver_template))
2720 return 0;
92d161c3 2721 spi_release_transport(ahc_linux_transport_template);
1da177e4
LT		 2722 ahc_linux_exit();
2723 return -ENODEV;
1da177e4
LT		 2724}
2725
2726static void
2727ahc_linux_exit(void)
2728{
1da177e4
LT		 2729 ahc_linux_pci_exit();
2730 ahc_linux_eisa_exit();
92d161c3 2731 spi_release_transport(ahc_linux_transport_template);
1da177e4
LT		 2732}
2733
2734module_init(ahc_linux_init);
2735module_exit(ahc_linux_exit);
Linux kernel - Deliverables
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