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[SCSI] Remove no-op implementations of SCSI EH hooks
[net-next-2.6.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
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
JB		 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
LT		 831 int found;
832
833 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
1da177e4
LT		 834 found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
835 /*initiate reset*/TRUE);
1da177e4
LT		 836
837 if (bootverbose)
838 printf("%s: SCSI bus reset delivered. "
839 "%d SCBs aborted.\n", ahc_name(ahc), found);
840
841 return SUCCESS;
842}
843
013791ee 844struct scsi_host_template aic7xxx_driver_template = {
1da177e4
LT		 845 .module = THIS_MODULE,
846 .name = "aic7xxx",
847 .proc_info = ahc_linux_proc_info,
848 .info = ahc_linux_info,
849 .queuecommand = ahc_linux_queue,
850 .eh_abort_handler = ahc_linux_abort,
851 .eh_device_reset_handler = ahc_linux_dev_reset,
852 .eh_bus_reset_handler = ahc_linux_bus_reset,
853#if defined(__i386__)
854 .bios_param = ahc_linux_biosparam,
855#endif
856 .can_queue = AHC_MAX_QUEUE,
857 .this_id = -1,
858 .cmd_per_lun = 2,
859 .use_clustering = ENABLE_CLUSTERING,
860 .slave_alloc = ahc_linux_slave_alloc,
861 .slave_configure = ahc_linux_slave_configure,
862 .slave_destroy = ahc_linux_slave_destroy,
b1abb4d6
JB		 863 .target_alloc = ahc_linux_target_alloc,
864 .target_destroy = ahc_linux_target_destroy,
1da177e4
LT		 865};
866
867/**************************** Tasklet Handler *********************************/
868
1da177e4
LT		 869/******************************** Macros **************************************/
870#define BUILD_SCSIID(ahc, cmd) \
871 ((((cmd)->device->id << TID_SHIFT) & TID) \
872 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
873 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
874
875/******************************** Bus DMA *************************************/
876int
877ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
878 bus_size_t alignment, bus_size_t boundary,
879 dma_addr_t lowaddr, dma_addr_t highaddr,
880 bus_dma_filter_t *filter, void *filterarg,
881 bus_size_t maxsize, int nsegments,
882 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
883{
884 bus_dma_tag_t dmat;
885
886 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
887 if (dmat == NULL)
888 return (ENOMEM);
889
890 /*
891 * Linux is very simplistic about DMA memory. For now don't
892 * maintain all specification information. Once Linux supplies
893 * better facilities for doing these operations, or the
894 * needs of this particular driver change, we might need to do
895 * more here.
896 */
897 dmat->alignment = alignment;
898 dmat->boundary = boundary;
899 dmat->maxsize = maxsize;
900 *ret_tag = dmat;
901 return (0);
902}
903
904void
905ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
906{
907 free(dmat, M_DEVBUF);
908}
909
910int
911ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
912 int flags, bus_dmamap_t *mapp)
913{
1da177e4 914 *vaddr = pci_alloc_consistent(ahc->dev_softc,
7dfa0f26 915 dmat->maxsize, mapp);
1da177e4 916 if (*vaddr == NULL)
7dfa0f26
CH		 917 return ENOMEM;
918 return 0;
1da177e4
LT		 919}
920
921void
922ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
923 void* vaddr, bus_dmamap_t map)
924{
925 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
7dfa0f26 926 vaddr, map);
1da177e4
LT		 927}
928
929int
930ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
931 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
932 void *cb_arg, int flags)
933{
934 /*
935 * Assume for now that this will only be used during
936 * initialization and not for per-transaction buffer mapping.
937 */
938 bus_dma_segment_t stack_sg;
939
7dfa0f26 940 stack_sg.ds_addr = map;
1da177e4
LT		 941 stack_sg.ds_len = dmat->maxsize;
942 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
943 return (0);
944}
945
946void
947ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
948{
1da177e4
LT		 949}
950
951int
952ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
953{
954 /* Nothing to do */
955 return (0);
956}
957
958/********************* Platform Dependent Functions ***************************/
959/*
960 * Compare "left hand" softc with "right hand" softc, returning:
961 * < 0 - lahc has a lower priority than rahc
962 * 0 - Softcs are equal
963 * > 0 - lahc has a higher priority than rahc
964 */
965int
966ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
967{
968 int value;
969 int rvalue;
970 int lvalue;
971
972 /*
973 * Under Linux, cards are ordered as follows:
974 * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
975 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
976 * 3) All remaining VLB/EISA devices sorted by ioport.
977 * 4) All remaining PCI devices sorted by bus/slot/func.
978 */
979 value = (lahc->flags & AHC_BIOS_ENABLED)
980 - (rahc->flags & AHC_BIOS_ENABLED);
981 if (value != 0)
982 /* Controllers with BIOS enabled have a *higher* priority */
983 return (value);
984
985 /*
986 * Same BIOS setting, now sort based on bus type.
987 * EISA and VL controllers sort together. EISA/VL
988 * have higher priority than PCI.
989 */
990 rvalue = (rahc->chip & AHC_BUS_MASK);
991 if (rvalue == AHC_VL)
992 rvalue = AHC_EISA;
993 lvalue = (lahc->chip & AHC_BUS_MASK);
994 if (lvalue == AHC_VL)
995 lvalue = AHC_EISA;
996 value = rvalue - lvalue;
997 if (value != 0)
998 return (value);
999
1000 /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
1001 switch (rvalue) {
1002#ifdef CONFIG_PCI
1003 case AHC_PCI:
1004 {
1005 char primary_channel;
1006
1007 if (aic7xxx_reverse_scan != 0)
1008 value = ahc_get_pci_bus(lahc->dev_softc)
1009 - ahc_get_pci_bus(rahc->dev_softc);
1010 else
1011 value = ahc_get_pci_bus(rahc->dev_softc)
1012 - ahc_get_pci_bus(lahc->dev_softc);
1013 if (value != 0)
1014 break;
1015 if (aic7xxx_reverse_scan != 0)
1016 value = ahc_get_pci_slot(lahc->dev_softc)
1017 - ahc_get_pci_slot(rahc->dev_softc);
1018 else
1019 value = ahc_get_pci_slot(rahc->dev_softc)
1020 - ahc_get_pci_slot(lahc->dev_softc);
1021 if (value != 0)
1022 break;
1023 /*
1024 * On multi-function devices, the user can choose
1025 * to have function 1 probed before function 0.
1026 * Give whichever channel is the primary channel
1027 * the highest priority.
1028 */
1029 primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
1030 value = -1;
1031 if (lahc->channel == primary_channel)
1032 value = 1;
1033 break;
1034 }
1035#endif
1036 case AHC_EISA:
1037 if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
1038 value = rahc->platform_data->bios_address
1039 - lahc->platform_data->bios_address;
1040 } else {
1041 value = rahc->bsh.ioport
1042 - lahc->bsh.ioport;
1043 }
1044 break;
1045 default:
1046 panic("ahc_softc_sort: invalid bus type");
1047 }
1048 return (value);
1049}
1050
1051static void
1052ahc_linux_setup_tag_info_global(char *p)
1053{
1054 int tags, i, j;
1055
1056 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1057 printf("Setting Global Tags= %d\n", tags);
1058
1059 for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
1060 for (j = 0; j < AHC_NUM_TARGETS; j++) {
1061 aic7xxx_tag_info[i].tag_commands[j] = tags;
1062 }
1063 }
1064}
1065
1066static void
1067ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1068{
1069
1070 if ((instance >= 0) && (targ >= 0)
1071 && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
1072 && (targ < AHC_NUM_TARGETS)) {
1073 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
1074 if (bootverbose)
1075 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1076 }
1077}
1078
1da177e4
LT		 1079/*
1080 * Handle Linux boot parameters. This routine allows for assigning a value
1081 * to a parameter with a ':' between the parameter and the value.
1082 * ie. aic7xxx=stpwlev:1,extended
1083 */
1084static int
1085aic7xxx_setup(char *s)
1086{
1087 int i, n;
1088 char *p;
1089 char *end;
1090
1091 static struct {
1092 const char *name;
1093 uint32_t *flag;
1094 } options[] = {
1095 { "extended", &aic7xxx_extended },
1096 { "no_reset", &aic7xxx_no_reset },
1097 { "verbose", &aic7xxx_verbose },
1098 { "allow_memio", &aic7xxx_allow_memio},
1099#ifdef AHC_DEBUG
1100 { "debug", &ahc_debug },
1101#endif
1102 { "reverse_scan", &aic7xxx_reverse_scan },
1da177e4
LT		 1103 { "periodic_otag", &aic7xxx_periodic_otag },
1104 { "pci_parity", &aic7xxx_pci_parity },
1105 { "seltime", &aic7xxx_seltime },
1106 { "tag_info", NULL },
1107 { "global_tag_depth", NULL },
1108 { "dv", NULL }
1109 };
1110
1111 end = strchr(s, '\0');
1112
1113 /*
1114 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1115 * will never be 0 in this case.
1116 */
1117 n = 0;
1118
1119 while ((p = strsep(&s, ",.")) != NULL) {
1120 if (*p == '\0')
1121 continue;
1122 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1123
1124 n = strlen(options[i].name);
1125 if (strncmp(options[i].name, p, n) == 0)
1126 break;
1127 }
1128 if (i == NUM_ELEMENTS(options))
1129 continue;
1130
1131 if (strncmp(p, "global_tag_depth", n) == 0) {
1132 ahc_linux_setup_tag_info_global(p + n);
1133 } else if (strncmp(p, "tag_info", n) == 0) {
1134 s = aic_parse_brace_option("tag_info", p + n, end,
1135 2, ahc_linux_setup_tag_info, 0);
1da177e4
LT		 1136 } else if (p[n] == ':') {
1137 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1138 } else if (strncmp(p, "verbose", n) == 0) {
1139 *(options[i].flag) = 1;
1140 } else {
1141 *(options[i].flag) ^= 0xFFFFFFFF;
1142 }
1143 }
1144 return 1;
1145}
1146
1147__setup("aic7xxx=", aic7xxx_setup);
1148
1149uint32_t aic7xxx_verbose;
1150
1151int
013791ee 1152ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1da177e4
LT		 1153{
1154 char buf[80];
1155 struct Scsi_Host *host;
1156 char *new_name;
1157 u_long s;
1da177e4
LT		 1158
1159 template->name = ahc->description;
1160 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1161 if (host == NULL)
1162 return (ENOMEM);
1163
1164 *((struct ahc_softc **)host->hostdata) = ahc;
1165 ahc_lock(ahc, &s);
1da177e4 1166 scsi_assign_lock(host, &ahc->platform_data->spin_lock);
1da177e4
LT		 1167 ahc->platform_data->host = host;
1168 host->can_queue = AHC_MAX_QUEUE;
1169 host->cmd_per_lun = 2;
1170 /* XXX No way to communicate the ID for multiple channels */
1171 host->this_id = ahc->our_id;
1172 host->irq = ahc->platform_data->irq;
1173 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1174 host->max_lun = AHC_NUM_LUNS;
1175 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1176 host->sg_tablesize = AHC_NSEG;
1177 ahc_set_unit(ahc, ahc_linux_next_unit());
1178 sprintf(buf, "scsi%d", host->host_no);
1179 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1180 if (new_name != NULL) {
1181 strcpy(new_name, buf);
1182 ahc_set_name(ahc, new_name);
1183 }
1184 host->unique_id = ahc->unit;
1da177e4 1185 ahc_linux_initialize_scsi_bus(ahc);
1da177e4 1186 ahc_intr_enable(ahc, TRUE);
1da177e4
LT		 1187 ahc_unlock(ahc, &s);
1188
92d161c3
JB		 1189 host->transportt = ahc_linux_transport_template;
1190
1da177e4
LT		 1191 scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
1192 scsi_scan_host(host);
1da177e4
LT		 1193 return (0);
1194}
1195
1196uint64_t
1197ahc_linux_get_memsize(void)
1198{
1199 struct sysinfo si;
1200
1201 si_meminfo(&si);
1202 return ((uint64_t)si.totalram << PAGE_SHIFT);
1203}
1204
1205/*
1206 * Find the smallest available unit number to use
1207 * for a new device. We don't just use a static
1208 * count to handle the "repeated hot-(un)plug"
1209 * scenario.
1210 */
1211static int
1212ahc_linux_next_unit(void)
1213{
1214 struct ahc_softc *ahc;
1215 int unit;
1216
1217 unit = 0;
1218retry:
1219 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
1220 if (ahc->unit == unit) {
1221 unit++;
1222 goto retry;
1223 }
1224 }
1225 return (unit);
1226}
1227
1228/*
1229 * Place the SCSI bus into a known state by either resetting it,
1230 * or forcing transfer negotiations on the next command to any
1231 * target.
1232 */
1233void
1234ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1235{
1236 int i;
1237 int numtarg;
1238
1239 i = 0;
1240 numtarg = 0;
1241
1242 if (aic7xxx_no_reset != 0)
1243 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1244
1245 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1246 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1247 else
1248 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1249
1250 if ((ahc->features & AHC_TWIN) != 0) {
1251
1252 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1253 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1254 } else {
1255 if (numtarg == 0)
1256 i = 8;
1257 numtarg += 8;
1258 }
1259 }
1260
1261 /*
1262 * Force negotiation to async for all targets that
1263 * will not see an initial bus reset.
1264 */
1265 for (; i < numtarg; i++) {
1266 struct ahc_devinfo devinfo;
1267 struct ahc_initiator_tinfo *tinfo;
1268 struct ahc_tmode_tstate *tstate;
1269 u_int our_id;
1270 u_int target_id;
1271 char channel;
1272
1273 channel = 'A';
1274 our_id = ahc->our_id;
1275 target_id = i;
1276 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1277 channel = 'B';
1278 our_id = ahc->our_id_b;
1279 target_id = i % 8;
1280 }
1281 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1282 target_id, &tstate);
1283 ahc_compile_devinfo(&devinfo, our_id, target_id,
1284 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1285 ahc_update_neg_request(ahc, &devinfo, tstate,
1286 tinfo, AHC_NEG_ALWAYS);
1287 }
1288 /* Give the bus some time to recover */
1289 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1290 ahc_linux_freeze_simq(ahc);
1291 init_timer(&ahc->platform_data->reset_timer);
1292 ahc->platform_data->reset_timer.data = (u_long)ahc;
1293 ahc->platform_data->reset_timer.expires =
1294 jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
1295 ahc->platform_data->reset_timer.function =
1296 ahc_linux_release_simq;
1297 add_timer(&ahc->platform_data->reset_timer);
1298 }
1299}
1300
1301int
1302ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1303{
1304
1305 ahc->platform_data =
1306 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1307 if (ahc->platform_data == NULL)
1308 return (ENOMEM);
1309 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1da177e4 1310 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1da177e4 1311 ahc_lockinit(ahc);
1da177e4 1312 init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
1da177e4
LT		 1313 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1314 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1315 if (aic7xxx_pci_parity == 0)
1316 ahc->flags |= AHC_DISABLE_PCI_PERR;
1317
1318 return (0);
1319}
1320
1321void
1322ahc_platform_free(struct ahc_softc *ahc)
1323{
b1abb4d6 1324 struct scsi_target *starget;
1da177e4
LT		 1325 int i, j;
1326
1327 if (ahc->platform_data != NULL) {
1da177e4 1328 if (ahc->platform_data->host != NULL) {
1da177e4 1329 scsi_remove_host(ahc->platform_data->host);
1da177e4
LT		 1330 scsi_host_put(ahc->platform_data->host);
1331 }
1332
1333 /* destroy all of the device and target objects */
1334 for (i = 0; i < AHC_NUM_TARGETS; i++) {
b1abb4d6
JB		 1335 starget = ahc->platform_data->starget[i];
1336 if (starget != NULL) {
1da177e4 1337 for (j = 0; j < AHC_NUM_LUNS; j++) {
b1abb4d6
JB		 1338 struct ahc_linux_target *targ =
1339 scsi_transport_target_data(starget);
1da177e4 1340
b1abb4d6 1341 if (targ->sdev[j] == NULL)
1da177e4 1342 continue;
b1abb4d6 1343 targ->sdev[j] = NULL;
1da177e4 1344 }
b1abb4d6 1345 ahc->platform_data->starget[i] = NULL;
1da177e4
LT		 1346 }
1347 }
1348
1349 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1350 free_irq(ahc->platform_data->irq, ahc);
1351 if (ahc->tag == BUS_SPACE_PIO
1352 && ahc->bsh.ioport != 0)
1353 release_region(ahc->bsh.ioport, 256);
1354 if (ahc->tag == BUS_SPACE_MEMIO
1355 && ahc->bsh.maddr != NULL) {
1356 iounmap(ahc->bsh.maddr);
1357 release_mem_region(ahc->platform_data->mem_busaddr,
1358 0x1000);
1359 }
dedd8310 1360
1da177e4
LT		 1361 free(ahc->platform_data, M_DEVBUF);
1362 }
1363}
1364
1365void
1366ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1367{
1368 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1369 SCB_GET_CHANNEL(ahc, scb),
1370 SCB_GET_LUN(scb), SCB_LIST_NULL,
1371 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1372}
1373
1374void
1375ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1376 ahc_queue_alg alg)
1377{
b1abb4d6
JB		 1378 struct scsi_target *starget;
1379 struct ahc_linux_target *targ;
1da177e4 1380 struct ahc_linux_device *dev;
b1abb4d6
JB		 1381 struct scsi_device *sdev;
1382 u_int target_offset;
1da177e4
LT		 1383 int was_queuing;
1384 int now_queuing;
1385
b1abb4d6
JB		 1386 target_offset = devinfo->target;
1387 if (devinfo->channel != 'A')
1388 target_offset += 8;
1389 starget = ahc->platform_data->starget[target_offset];
1390 targ = scsi_transport_target_data(starget);
1391 BUG_ON(targ == NULL);
1392 sdev = targ->sdev[devinfo->lun];
1393 if (sdev == NULL)
1da177e4 1394 return;
b1abb4d6
JB		 1395 dev = scsi_transport_device_data(sdev);
1396
1da177e4
LT		 1397 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1398 switch (alg) {
1399 default:
1400 case AHC_QUEUE_NONE:
1401 now_queuing = 0;
1402 break;
1403 case AHC_QUEUE_BASIC:
1404 now_queuing = AHC_DEV_Q_BASIC;
1405 break;
1406 case AHC_QUEUE_TAGGED:
1407 now_queuing = AHC_DEV_Q_TAGGED;
1408 break;
1409 }
1410 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1411 && (was_queuing != now_queuing)
1412 && (dev->active != 0)) {
1413 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1414 dev->qfrozen++;
1415 }
1416
1417 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1418 if (now_queuing) {
1419 u_int usertags;
1420
1421 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1422 if (!was_queuing) {
1423 /*
1424 * Start out agressively and allow our
1425 * dynamic queue depth algorithm to take
1426 * care of the rest.
1427 */
1428 dev->maxtags = usertags;
1429 dev->openings = dev->maxtags - dev->active;
1430 }
1431 if (dev->maxtags == 0) {
1432 /*
1433 * Queueing is disabled by the user.
1434 */
1435 dev->openings = 1;
1436 } else if (alg == AHC_QUEUE_TAGGED) {
1437 dev->flags |= AHC_DEV_Q_TAGGED;
1438 if (aic7xxx_periodic_otag != 0)
1439 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1440 } else
1441 dev->flags |= AHC_DEV_Q_BASIC;
1442 } else {
1443 /* We can only have one opening. */
1444 dev->maxtags = 0;
1445 dev->openings = 1 - dev->active;
1446 }
b1abb4d6
JB		 1447 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1448 case AHC_DEV_Q_BASIC:
1449 scsi_adjust_queue_depth(sdev,
1450 MSG_SIMPLE_TASK,
1451 dev->openings + dev->active);
1452 break;
1453 case AHC_DEV_Q_TAGGED:
1454 scsi_adjust_queue_depth(sdev,
1455 MSG_ORDERED_TASK,
1456 dev->openings + dev->active);
1457 break;
1458 default:
1459 /*
1460 * We allow the OS to queue 2 untagged transactions to
1461 * us at any time even though we can only execute them
1462 * serially on the controller/device. This should
1463 * remove some latency.
1464 */
1465 scsi_adjust_queue_depth(sdev,
1466 /*NON-TAGGED*/0,
1467 /*queue depth*/2);
1468 break;
1da177e4 1469 }
1da177e4
LT		 1470}
1471
1472int
1473ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1474 int lun, u_int tag, role_t role, uint32_t status)
1475{
e4e360c3 1476 return 0;
1da177e4
LT		 1477}
1478
cb624029
JB		 1479static u_int
1480ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1da177e4 1481{
cb624029
JB		 1482 static int warned_user;
1483 u_int tags;
1da177e4 1484
cb624029
JB		 1485 tags = 0;
1486 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1487 if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
1488 if (warned_user == 0) {
1da177e4 1489
cb624029
JB		 1490 printf(KERN_WARNING
1491"aic7xxx: WARNING: Insufficient tag_info instances\n"
1492"aic7xxx: for installed controllers. Using defaults\n"
1493"aic7xxx: Please update the aic7xxx_tag_info array in\n"
1494"aic7xxx: the aic7xxx_osm..c source file.\n");
1495 warned_user++;
1496 }
1497 tags = AHC_MAX_QUEUE;
1498 } else {
1499 adapter_tag_info_t *tag_info;
1da177e4 1500
cb624029
JB		 1501 tag_info = &aic7xxx_tag_info[ahc->unit];
1502 tags = tag_info->tag_commands[devinfo->target_offset];
1503 if (tags > AHC_MAX_QUEUE)
1504 tags = AHC_MAX_QUEUE;
1505 }
1da177e4 1506 }
cb624029 1507 return (tags);
1da177e4
LT		 1508}
1509
cb624029
JB		 1510/*
1511 * Determines the queue depth for a given device.
1512 */
1da177e4 1513static void
b1abb4d6 1514ahc_linux_device_queue_depth(struct scsi_device *sdev)
1da177e4 1515{
cb624029
JB		 1516 struct ahc_devinfo devinfo;
1517 u_int tags;
b1abb4d6 1518 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1da177e4 1519
cb624029 1520 ahc_compile_devinfo(&devinfo,
b1abb4d6 1521 sdev->sdev_target->channel == 0
cb624029 1522 ? ahc->our_id : ahc->our_id_b,
b1abb4d6
JB		 1523 sdev->sdev_target->id, sdev->lun,
1524 sdev->sdev_target->channel == 0 ? 'A' : 'B',
cb624029
JB		 1525 ROLE_INITIATOR);
1526 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
b1abb4d6 1527 if (tags != 0 && sdev->tagged_supported != 0) {
1da177e4 1528
cb624029
JB		 1529 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
1530 ahc_print_devinfo(ahc, &devinfo);
1531 printf("Tagged Queuing enabled. Depth %d\n", tags);
1da177e4 1532 } else {
cb624029 1533 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
1da177e4
LT		 1534 }
1535}
1536
e4e360c3
JB		 1537static int
1538ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1539 struct scsi_cmnd *cmd)
1da177e4 1540{
cb624029
JB		 1541 struct scb *scb;
1542 struct hardware_scb *hscb;
1543 struct ahc_initiator_tinfo *tinfo;
1544 struct ahc_tmode_tstate *tstate;
1545 uint16_t mask;
e4e360c3 1546 struct scb_tailq *untagged_q = NULL;
1da177e4 1547
e4e360c3
JB		 1548 /*
1549 * Schedule us to run later. The only reason we are not
1550 * running is because the whole controller Q is frozen.
1551 */
1552 if (ahc->platform_data->qfrozen != 0)
1553 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1554
e4e360c3
JB		 1555 /*
1556 * We only allow one untagged transaction
1557 * per target in the initiator role unless
1558 * we are storing a full busy target *lun*
1559 * table in SCB space.
1560 */
1561 if (!blk_rq_tagged(cmd->request)
1562 && (ahc->features & AHC_SCB_BTT) == 0) {
1563 int target_offset;
1da177e4 1564
e4e360c3
JB		 1565 target_offset = cmd->device->id + cmd->device->channel * 8;
1566 untagged_q = &(ahc->untagged_queues[target_offset]);
1567 if (!TAILQ_EMPTY(untagged_q))
1568 /* if we're already executing an untagged command
1569 * we're busy to another */
1570 return SCSI_MLQUEUE_DEVICE_BUSY;
1571 }
1572
1573 /*
1574 * Get an scb to use.
1575 */
8eb37942
CH		 1576 scb = ahc_get_scb(ahc);
1577 if (!scb)
1578 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1579
e4e360c3
JB		 1580 scb->io_ctx = cmd;
1581 scb->platform_data->dev = dev;
1582 hscb = scb->hscb;
1583 cmd->host_scribble = (char *)scb;
1da177e4 1584
e4e360c3
JB		 1585 /*
1586 * Fill out basics of the HSCB.
1587 */
1588 hscb->control = 0;
1589 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1590 hscb->lun = cmd->device->lun;
1591 mask = SCB_GET_TARGET_MASK(ahc, scb);
1592 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1593 SCB_GET_OUR_ID(scb),
1594 SCB_GET_TARGET(ahc, scb), &tstate);
1595 hscb->scsirate = tinfo->scsirate;
1596 hscb->scsioffset = tinfo->curr.offset;
1597 if ((tstate->ultraenb & mask) != 0)
1598 hscb->control |= ULTRAENB;
1599
1600 if ((ahc->user_discenable & mask) != 0)
1601 hscb->control |= DISCENB;
1602
1603 if ((tstate->auto_negotiate & mask) != 0) {
1604 scb->flags |= SCB_AUTO_NEGOTIATE;
1605 scb->hscb->control |= MK_MESSAGE;
1606 }
1607
1608 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
e4e360c3
JB		 1609 int msg_bytes;
1610 uint8_t tag_msgs[2];
1611
1612 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1613 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1614 hscb->control |= tag_msgs[0];
1615 if (tag_msgs[0] == MSG_ORDERED_TASK)
cb624029 1616 dev->commands_since_idle_or_otag = 0;
dedd8310
CH		 1617 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1618 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
e4e360c3
JB		 1619 hscb->control |= MSG_ORDERED_TASK;
1620 dev->commands_since_idle_or_otag = 0;
cb624029 1621 } else {
e4e360c3 1622 hscb->control |= MSG_SIMPLE_TASK;
cb624029 1623 }
e4e360c3 1624 }
1da177e4 1625
e4e360c3
JB		 1626 hscb->cdb_len = cmd->cmd_len;
1627 if (hscb->cdb_len <= 12) {
1628 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1629 } else {
1630 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1631 scb->flags |= SCB_CDB32_PTR;
1632 }
1da177e4 1633
e4e360c3
JB		 1634 scb->platform_data->xfer_len = 0;
1635 ahc_set_residual(scb, 0);
1636 ahc_set_sense_residual(scb, 0);
1637 scb->sg_count = 0;
1638 if (cmd->use_sg != 0) {
1639 struct ahc_dma_seg *sg;
1640 struct scatterlist *cur_seg;
1641 struct scatterlist *end_seg;
1642 int nseg;
1643
1644 cur_seg = (struct scatterlist *)cmd->request_buffer;
1645 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
1646 cmd->sc_data_direction);
1647 end_seg = cur_seg + nseg;
1648 /* Copy the segments into the SG list. */
1649 sg = scb->sg_list;
1650 /*
1651 * The sg_count may be larger than nseg if
1652 * a transfer crosses a 32bit page.
1653 */
1654 while (cur_seg < end_seg) {
1da177e4 1655 dma_addr_t addr;
e4e360c3
JB		 1656 bus_size_t len;
1657 int consumed;
1658
1659 addr = sg_dma_address(cur_seg);
1660 len = sg_dma_len(cur_seg);
1661 consumed = ahc_linux_map_seg(ahc, scb,
1662 sg, addr, len);
1663 sg += consumed;
1664 scb->sg_count += consumed;
1665 cur_seg++;
1da177e4 1666 }
e4e360c3
JB		 1667 sg--;
1668 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4 1669
e4e360c3
JB		 1670 /*
1671 * Reset the sg list pointer.
1672 */
1673 scb->hscb->sgptr =
1674 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1675
1676 /*
1677 * Copy the first SG into the "current"
1678 * data pointer area.
1679 */
1680 scb->hscb->dataptr = scb->sg_list->addr;
1681 scb->hscb->datacnt = scb->sg_list->len;
1682 } else if (cmd->request_bufflen != 0) {
1683 struct ahc_dma_seg *sg;
1684 dma_addr_t addr;
1685
1686 sg = scb->sg_list;
1687 addr = pci_map_single(ahc->dev_softc,
1688 cmd->request_buffer,
1689 cmd->request_bufflen,
1690 cmd->sc_data_direction);
1691 scb->platform_data->buf_busaddr = addr;
1692 scb->sg_count = ahc_linux_map_seg(ahc, scb,
1693 sg, addr,
1694 cmd->request_bufflen);
1695 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4
LT		 1696
1697 /*
e4e360c3 1698 * Reset the sg list pointer.
1da177e4 1699 */
e4e360c3
JB		 1700 scb->hscb->sgptr =
1701 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1702
1703 /*
1704 * Copy the first SG into the "current"
1705 * data pointer area.
1706 */
1707 scb->hscb->dataptr = sg->addr;
1708 scb->hscb->datacnt = sg->len;
1709 } else {
1710 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1711 scb->hscb->dataptr = 0;
1712 scb->hscb->datacnt = 0;
1713 scb->sg_count = 0;
1714 }
1715
1716 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1717 dev->openings--;
1718 dev->active++;
1719 dev->commands_issued++;
1720 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1721 dev->commands_since_idle_or_otag++;
1722
1723 scb->flags |= SCB_ACTIVE;
1724 if (untagged_q) {
1725 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1726 scb->flags |= SCB_UNTAGGEDQ;
1da177e4 1727 }
e4e360c3
JB		 1728 ahc_queue_scb(ahc, scb);
1729 return 0;
1da177e4
LT		 1730}
1731
1732/*
1733 * SCSI controller interrupt handler.
1734 */
1735irqreturn_t
1736ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1737{
1738 struct ahc_softc *ahc;
1739 u_long flags;
1740 int ours;
1741
1742 ahc = (struct ahc_softc *) dev_id;
1743 ahc_lock(ahc, &flags);
1744 ours = ahc_intr(ahc);
1da177e4
LT		 1745 ahc_unlock(ahc, &flags);
1746 return IRQ_RETVAL(ours);
1747}
1748
1749void
1750ahc_platform_flushwork(struct ahc_softc *ahc)
1751{
1752
1da177e4
LT		 1753}
1754
1da177e4
LT		 1755void
1756ahc_send_async(struct ahc_softc *ahc, char channel,
1757 u_int target, u_int lun, ac_code code, void *arg)
1758{
1759 switch (code) {
1760 case AC_TRANSFER_NEG:
1761 {
1762 char buf[80];
b1abb4d6 1763 struct scsi_target *starget;
1da177e4
LT		 1764 struct ahc_linux_target *targ;
1765 struct info_str info;
1766 struct ahc_initiator_tinfo *tinfo;
1767 struct ahc_tmode_tstate *tstate;
1768 int target_offset;
b1abb4d6
JB		 1769 unsigned int target_ppr_options;
1770
1771 BUG_ON(target == CAM_TARGET_WILDCARD);
1da177e4
LT		 1772
1773 info.buffer = buf;
1774 info.length = sizeof(buf);
1775 info.offset = 0;
1776 info.pos = 0;
1777 tinfo = ahc_fetch_transinfo(ahc, channel,
1778 channel == 'A' ? ahc->our_id
1779 : ahc->our_id_b,
1780 target, &tstate);
1781
1782 /*
1783 * Don't bother reporting results while
1784 * negotiations are still pending.
1785 */
1786 if (tinfo->curr.period != tinfo->goal.period
1787 || tinfo->curr.width != tinfo->goal.width
1788 || tinfo->curr.offset != tinfo->goal.offset
1789 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1790 if (bootverbose == 0)
1791 break;
1792
1793 /*
1794 * Don't bother reporting results that
1795 * are identical to those last reported.
1796 */
1797 target_offset = target;
1798 if (channel == 'B')
1799 target_offset += 8;
b1abb4d6
JB		 1800 starget = ahc->platform_data->starget[target_offset];
1801 targ = scsi_transport_target_data(starget);
1da177e4
LT		 1802 if (targ == NULL)
1803 break;
b1abb4d6
JB		 1804
1805 target_ppr_options =
1806 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1807 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1808 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1809
1810 if (tinfo->curr.period == spi_period(starget)
1811 && tinfo->curr.width == spi_width(starget)
1812 && tinfo->curr.offset == spi_offset(starget)
1813 && tinfo->curr.ppr_options == target_ppr_options)
1da177e4
LT		 1814 if (bootverbose == 0)
1815 break;
1816
b1abb4d6
JB		 1817 spi_period(starget) = tinfo->curr.period;
1818 spi_width(starget) = tinfo->curr.width;
1819 spi_offset(starget) = tinfo->curr.offset;
1820 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ;
1821 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ;
1822 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ;
1823 spi_display_xfer_agreement(starget);
1da177e4
LT		 1824 break;
1825 }
1826 case AC_SENT_BDR:
1827 {
1da177e4
LT		 1828 WARN_ON(lun != CAM_LUN_WILDCARD);
1829 scsi_report_device_reset(ahc->platform_data->host,
1830 channel - 'A', target);
1da177e4
LT		 1831 break;
1832 }
1833 case AC_BUS_RESET:
1834 if (ahc->platform_data->host != NULL) {
1835 scsi_report_bus_reset(ahc->platform_data->host,
1836 channel - 'A');
1837 }
1838 break;
1839 default:
1840 panic("ahc_send_async: Unexpected async event");
1841 }
1842}
1843
1844/*
1845 * Calls the higher level scsi done function and frees the scb.
1846 */
1847void
1848ahc_done(struct ahc_softc *ahc, struct scb *scb)
1849{
013791ee 1850 struct scsi_cmnd *cmd;
1da177e4
LT		 1851 struct ahc_linux_device *dev;
1852
1853 LIST_REMOVE(scb, pending_links);
1854 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1855 struct scb_tailq *untagged_q;
1856 int target_offset;
1857
1858 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1859 untagged_q = &(ahc->untagged_queues[target_offset]);
1860 TAILQ_REMOVE(untagged_q, scb, links.tqe);
e4e360c3 1861 BUG_ON(!TAILQ_EMPTY(untagged_q));
1da177e4
LT		 1862 }
1863
1864 if ((scb->flags & SCB_ACTIVE) == 0) {
1865 printf("SCB %d done'd twice\n", scb->hscb->tag);
1866 ahc_dump_card_state(ahc);
1867 panic("Stopping for safety");
1868 }
1869 cmd = scb->io_ctx;
1870 dev = scb->platform_data->dev;
1871 dev->active--;
1872 dev->openings++;
1873 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1874 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1875 dev->qfrozen--;
1876 }
1877 ahc_linux_unmap_scb(ahc, scb);
1878
1879 /*
1880 * Guard against stale sense data.
1881 * The Linux mid-layer assumes that sense
1882 * was retrieved anytime the first byte of
1883 * the sense buffer looks "sane".
1884 */
1885 cmd->sense_buffer[0] = 0;
1886 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1887 uint32_t amount_xferred;
1888
1889 amount_xferred =
1890 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1891 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1892#ifdef AHC_DEBUG
1893 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1894 ahc_print_path(ahc, scb);
1895 printf("Set CAM_UNCOR_PARITY\n");
1896 }
1897#endif
1898 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1899#ifdef AHC_REPORT_UNDERFLOWS
1900 /*
1901 * This code is disabled by default as some
1902 * clients of the SCSI system do not properly
1903 * initialize the underflow parameter. This
1904 * results in spurious termination of commands
1905 * that complete as expected (e.g. underflow is
1906 * allowed as command can return variable amounts
1907 * of data.
1908 */
1909 } else if (amount_xferred < scb->io_ctx->underflow) {
1910 u_int i;
1911
1912 ahc_print_path(ahc, scb);
1913 printf("CDB:");
1914 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1915 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1916 printf("\n");
1917 ahc_print_path(ahc, scb);
1918 printf("Saw underflow (%ld of %ld bytes). "
1919 "Treated as error\n",
1920 ahc_get_residual(scb),
1921 ahc_get_transfer_length(scb));
1922 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1923#endif
1924 } else {
1925 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1926 }
1927 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
b1abb4d6 1928 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1da177e4 1929 }
1da177e4
LT		 1930
1931 if (dev->openings == 1
1932 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1933 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1934 dev->tag_success_count++;
1935 /*
1936 * Some devices deal with temporary internal resource
1937 * shortages by returning queue full. When the queue
1938 * full occurrs, we throttle back. Slowly try to get
1939 * back to our previous queue depth.
1940 */
1941 if ((dev->openings + dev->active) < dev->maxtags
1942 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1943 dev->tag_success_count = 0;
1944 dev->openings++;
1945 }
1946
1947 if (dev->active == 0)
1948 dev->commands_since_idle_or_otag = 0;
1949
1da177e4
LT		 1950 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1951 printf("Recovery SCB completes\n");
1952 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1953 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1954 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1955 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
1956 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
1957 up(&ahc->platform_data->eh_sem);
1958 }
1959 }
1960
1961 ahc_free_scb(ahc, scb);
1962 ahc_linux_queue_cmd_complete(ahc, cmd);
1da177e4
LT		 1963}
1964
1965static void
1966ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
b1abb4d6 1967 struct scsi_device *sdev, struct scb *scb)
1da177e4
LT		 1968{
1969 struct ahc_devinfo devinfo;
b1abb4d6 1970 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1da177e4
LT		 1971
1972 ahc_compile_devinfo(&devinfo,
1973 ahc->our_id,
b1abb4d6
JB		 1974 sdev->sdev_target->id, sdev->lun,
1975 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1da177e4
LT		 1976 ROLE_INITIATOR);
1977
1978 /*
1979 * We don't currently trust the mid-layer to
1980 * properly deal with queue full or busy. So,
1981 * when one occurs, we tell the mid-layer to
1982 * unconditionally requeue the command to us
1983 * so that we can retry it ourselves. We also
1984 * implement our own throttling mechanism so
1985 * we don't clobber the device with too many
1986 * commands.
1987 */
1988 switch (ahc_get_scsi_status(scb)) {
1989 default:
1990 break;
1991 case SCSI_STATUS_CHECK_COND:
1992 case SCSI_STATUS_CMD_TERMINATED:
1993 {
013791ee 1994 struct scsi_cmnd *cmd;
1da177e4
LT		 1995
1996 /*
1997 * Copy sense information to the OS's cmd
1998 * structure if it is available.
1999 */
2000 cmd = scb->io_ctx;
2001 if (scb->flags & SCB_SENSE) {
2002 u_int sense_size;
2003
2004 sense_size = MIN(sizeof(struct scsi_sense_data)
2005 - ahc_get_sense_residual(scb),
2006 sizeof(cmd->sense_buffer));
2007 memcpy(cmd->sense_buffer,
2008 ahc_get_sense_buf(ahc, scb), sense_size);
2009 if (sense_size < sizeof(cmd->sense_buffer))
2010 memset(&cmd->sense_buffer[sense_size], 0,
2011 sizeof(cmd->sense_buffer) - sense_size);
2012 cmd->result |= (DRIVER_SENSE << 24);
2013#ifdef AHC_DEBUG
2014 if (ahc_debug & AHC_SHOW_SENSE) {
2015 int i;
2016
2017 printf("Copied %d bytes of sense data:",
2018 sense_size);
2019 for (i = 0; i < sense_size; i++) {
2020 if ((i & 0xF) == 0)
2021 printf("\n");
2022 printf("0x%x ", cmd->sense_buffer[i]);
2023 }
2024 printf("\n");
2025 }
2026#endif
2027 }
2028 break;
2029 }
2030 case SCSI_STATUS_QUEUE_FULL:
2031 {
2032 /*
2033 * By the time the core driver has returned this
2034 * command, all other commands that were queued
2035 * to us but not the device have been returned.
2036 * This ensures that dev->active is equal to
2037 * the number of commands actually queued to
2038 * the device.
2039 */
2040 dev->tag_success_count = 0;
2041 if (dev->active != 0) {
2042 /*
2043 * Drop our opening count to the number
2044 * of commands currently outstanding.
2045 */
2046 dev->openings = 0;
2047/*
2048 ahc_print_path(ahc, scb);
2049 printf("Dropping tag count to %d\n", dev->active);
2050 */
2051 if (dev->active == dev->tags_on_last_queuefull) {
2052
2053 dev->last_queuefull_same_count++;
2054 /*
2055 * If we repeatedly see a queue full
2056 * at the same queue depth, this
2057 * device has a fixed number of tag
2058 * slots. Lock in this tag depth
2059 * so we stop seeing queue fulls from
2060 * this device.
2061 */
2062 if (dev->last_queuefull_same_count
2063 == AHC_LOCK_TAGS_COUNT) {
2064 dev->maxtags = dev->active;
2065 ahc_print_path(ahc, scb);
2066 printf("Locking max tag count at %d\n",
2067 dev->active);
2068 }
2069 } else {
2070 dev->tags_on_last_queuefull = dev->active;
2071 dev->last_queuefull_same_count = 0;
2072 }
2073 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
2074 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
2075 ahc_platform_set_tags(ahc, &devinfo,
2076 (dev->flags & AHC_DEV_Q_BASIC)
2077 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
2078 break;
2079 }
2080 /*
2081 * Drop down to a single opening, and treat this
2082 * as if the target returned BUSY SCSI status.
2083 */
2084 dev->openings = 1;
2085 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
2086 ahc_platform_set_tags(ahc, &devinfo,
2087 (dev->flags & AHC_DEV_Q_BASIC)
2088 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1da177e4
LT		 2089 break;
2090 }
2091 }
2092}
2093
2094static void
013791ee 2095ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1da177e4 2096{
1da177e4
LT		 2097 /*
2098 * Map CAM error codes into Linux Error codes. We
2099 * avoid the conversion so that the DV code has the
2100 * full error information available when making
2101 * state change decisions.
2102 */
cb624029 2103 {
1da177e4
LT		 2104 u_int new_status;
2105
2106 switch (ahc_cmd_get_transaction_status(cmd)) {
2107 case CAM_REQ_INPROG:
2108 case CAM_REQ_CMP:
2109 case CAM_SCSI_STATUS_ERROR:
2110 new_status = DID_OK;
2111 break;
2112 case CAM_REQ_ABORTED:
2113 new_status = DID_ABORT;
2114 break;
2115 case CAM_BUSY:
2116 new_status = DID_BUS_BUSY;
2117 break;
2118 case CAM_REQ_INVALID:
2119 case CAM_PATH_INVALID:
2120 new_status = DID_BAD_TARGET;
2121 break;
2122 case CAM_SEL_TIMEOUT:
2123 new_status = DID_NO_CONNECT;
2124 break;
2125 case CAM_SCSI_BUS_RESET:
2126 case CAM_BDR_SENT:
2127 new_status = DID_RESET;
2128 break;
2129 case CAM_UNCOR_PARITY:
2130 new_status = DID_PARITY;
2131 break;
2132 case CAM_CMD_TIMEOUT:
2133 new_status = DID_TIME_OUT;
2134 break;
2135 case CAM_UA_ABORT:
2136 case CAM_REQ_CMP_ERR:
2137 case CAM_AUTOSENSE_FAIL:
2138 case CAM_NO_HBA:
2139 case CAM_DATA_RUN_ERR:
2140 case CAM_UNEXP_BUSFREE:
2141 case CAM_SEQUENCE_FAIL:
2142 case CAM_CCB_LEN_ERR:
2143 case CAM_PROVIDE_FAIL:
2144 case CAM_REQ_TERMIO:
2145 case CAM_UNREC_HBA_ERROR:
2146 case CAM_REQ_TOO_BIG:
2147 new_status = DID_ERROR;
2148 break;
2149 case CAM_REQUEUE_REQ:
8e45ebcc 2150 new_status = DID_REQUEUE;
1da177e4
LT		 2151 break;
2152 default:
2153 /* We should never get here */
2154 new_status = DID_ERROR;
2155 break;
2156 }
2157
2158 ahc_cmd_set_transaction_status(cmd, new_status);
2159 }
2160
8e45ebcc 2161 cmd->scsi_done(cmd);
1da177e4
LT		 2162}
2163
1da177e4
LT		 2164static void
2165ahc_linux_sem_timeout(u_long arg)
2166{
2167 struct ahc_softc *ahc;
2168 u_long s;
2169
2170 ahc = (struct ahc_softc *)arg;
2171
2172 ahc_lock(ahc, &s);
2173 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2174 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2175 up(&ahc->platform_data->eh_sem);
2176 }
2177 ahc_unlock(ahc, &s);
2178}
2179
2180static void
2181ahc_linux_freeze_simq(struct ahc_softc *ahc)
2182{
2183 ahc->platform_data->qfrozen++;
2184 if (ahc->platform_data->qfrozen == 1) {
2185 scsi_block_requests(ahc->platform_data->host);
2186
2187 /* XXX What about Twin channels? */
2188 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2189 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2190 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2191 }
2192}
2193
2194static void
2195ahc_linux_release_simq(u_long arg)
2196{
2197 struct ahc_softc *ahc;
2198 u_long s;
2199 int unblock_reqs;
2200
2201 ahc = (struct ahc_softc *)arg;
2202
2203 unblock_reqs = 0;
2204 ahc_lock(ahc, &s);
2205 if (ahc->platform_data->qfrozen > 0)
2206 ahc->platform_data->qfrozen--;
2207 if (ahc->platform_data->qfrozen == 0)
2208 unblock_reqs = 1;
1da177e4
LT		 2209 ahc_unlock(ahc, &s);
2210 /*
2211 * There is still a race here. The mid-layer
2212 * should keep its own freeze count and use
2213 * a bottom half handler to run the queues
2214 * so we can unblock with our own lock held.
2215 */
2216 if (unblock_reqs)
2217 scsi_unblock_requests(ahc->platform_data->host);
2218}
2219
1da177e4 2220static int
013791ee 2221ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
1da177e4
LT		 2222{
2223 struct ahc_softc *ahc;
1da177e4
LT		 2224 struct ahc_linux_device *dev;
2225 struct scb *pending_scb;
1da177e4
LT		 2226 u_int saved_scbptr;
2227 u_int active_scb_index;
2228 u_int last_phase;
2229 u_int saved_scsiid;
2230 u_int cdb_byte;
2231 int retval;
2232 int was_paused;
2233 int paused;
2234 int wait;
2235 int disconnected;
2236
2237 pending_scb = NULL;
2238 paused = FALSE;
2239 wait = FALSE;
2240 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
1da177e4
LT		 2241
2242 printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
2243 ahc_name(ahc), cmd->device->channel,
2244 cmd->device->id, cmd->device->lun,
2245 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2246
2247 printf("CDB:");
2248 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2249 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2250 printf("\n");
2251
1da177e4
LT		 2252 /*
2253 * First determine if we currently own this command.
2254 * Start by searching the device queue. If not found
2255 * there, check the pending_scb list. If not found
2256 * at all, and the system wanted us to just abort the
2257 * command, return success.
2258 */
b1abb4d6 2259 dev = scsi_transport_device_data(cmd->device);
1da177e4
LT		 2260
2261 if (dev == NULL) {
2262 /*
2263 * No target device for this command exists,
2264 * so we must not still own the command.
2265 */
2266 printf("%s:%d:%d:%d: Is not an active device\n",
2267 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2268 cmd->device->lun);
2269 retval = SUCCESS;
2270 goto no_cmd;
2271 }
2272
1da177e4
LT		 2273 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2274 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2275 cmd->device->channel + 'A',
2276 cmd->device->lun,
2277 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2278 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2279 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2280 cmd->device->lun);
2281 retval = SUCCESS;
2282 goto done;
2283 }
2284
2285 /*
2286 * See if we can find a matching cmd in the pending list.
2287 */
2288 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2289 if (pending_scb->io_ctx == cmd)
2290 break;
2291 }
2292
2293 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2294
2295 /* Any SCB for this device will do for a target reset */
2296 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2297 if (ahc_match_scb(ahc, pending_scb, cmd->device->id,
2298 cmd->device->channel + 'A',
2299 CAM_LUN_WILDCARD,
2300 SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2301 break;
2302 }
2303 }
2304
2305 if (pending_scb == NULL) {
2306 printf("%s:%d:%d:%d: Command not found\n",
2307 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2308 cmd->device->lun);
2309 goto no_cmd;
2310 }
2311
2312 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2313 /*
2314 * We can't queue two recovery actions using the same SCB
2315 */
2316 retval = FAILED;
2317 goto done;
2318 }
2319
2320 /*
2321 * Ensure that the card doesn't do anything
2322 * behind our back and that we didn't "just" miss
2323 * an interrupt that would affect this cmd.
2324 */
2325 was_paused = ahc_is_paused(ahc);
2326 ahc_pause_and_flushwork(ahc);
2327 paused = TRUE;
2328
2329 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2330 printf("%s:%d:%d:%d: Command already completed\n",
2331 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2332 cmd->device->lun);
2333 goto no_cmd;
2334 }
2335
2336 printf("%s: At time of recovery, card was %spaused\n",
2337 ahc_name(ahc), was_paused ? "" : "not ");
2338 ahc_dump_card_state(ahc);
2339
2340 disconnected = TRUE;
2341 if (flag == SCB_ABORT) {
2342 if (ahc_search_qinfifo(ahc, cmd->device->id,
2343 cmd->device->channel + 'A',
2344 cmd->device->lun,
2345 pending_scb->hscb->tag,
2346 ROLE_INITIATOR, CAM_REQ_ABORTED,
2347 SEARCH_COMPLETE) > 0) {
2348 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2349 ahc_name(ahc), cmd->device->channel,
2350 cmd->device->id, cmd->device->lun);
2351 retval = SUCCESS;
2352 goto done;
2353 }
2354 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2355 cmd->device->channel + 'A',
2356 cmd->device->lun, pending_scb->hscb->tag,
2357 ROLE_INITIATOR, /*status*/0,
2358 SEARCH_COUNT) > 0) {
2359 disconnected = FALSE;
2360 }
2361
2362 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2363 struct scb *bus_scb;
2364
2365 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2366 if (bus_scb == pending_scb)
2367 disconnected = FALSE;
2368 else if (flag != SCB_ABORT
2369 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2370 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2371 disconnected = FALSE;
2372 }
2373
2374 /*
2375 * At this point, pending_scb is the scb associated with the
2376 * passed in command. That command is currently active on the
2377 * bus, is in the disconnected state, or we're hoping to find
2378 * a command for the same target active on the bus to abuse to
2379 * send a BDR. Queue the appropriate message based on which of
2380 * these states we are in.
2381 */
2382 last_phase = ahc_inb(ahc, LASTPHASE);
2383 saved_scbptr = ahc_inb(ahc, SCBPTR);
2384 active_scb_index = ahc_inb(ahc, SCB_TAG);
2385 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2386 if (last_phase != P_BUSFREE
2387 && (pending_scb->hscb->tag == active_scb_index
2388 || (flag == SCB_DEVICE_RESET
2389 && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) {
2390
2391 /*
2392 * We're active on the bus, so assert ATN
2393 * and hope that the target responds.
2394 */
2395 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2396 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2397 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2398 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2399 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
2400 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2401 cmd->device->lun);
2402 wait = TRUE;
2403 } else if (disconnected) {
2404
2405 /*
2406 * Actually re-queue this SCB in an attempt
2407 * to select the device before it reconnects.
2408 * In either case (selection or reselection),
2409 * we will now issue the approprate message
2410 * to the timed-out device.
2411 *
2412 * Set the MK_MESSAGE control bit indicating
2413 * that we desire to send a message. We
2414 * also set the disconnected flag since
2415 * in the paging case there is no guarantee
2416 * that our SCB control byte matches the
2417 * version on the card. We don't want the
2418 * sequencer to abort the command thinking
2419 * an unsolicited reselection occurred.
2420 */
2421 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2422 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2423
2424 /*
2425 * Remove any cached copy of this SCB in the
2426 * disconnected list in preparation for the
2427 * queuing of our abort SCB. We use the
2428 * same element in the SCB, SCB_NEXT, for
2429 * both the qinfifo and the disconnected list.
2430 */
2431 ahc_search_disc_list(ahc, cmd->device->id,
2432 cmd->device->channel + 'A',
2433 cmd->device->lun, pending_scb->hscb->tag,
2434 /*stop_on_first*/TRUE,
2435 /*remove*/TRUE,
2436 /*save_state*/FALSE);
2437
2438 /*
2439 * In the non-paging case, the sequencer will
2440 * never re-reference the in-core SCB.
2441 * To make sure we are notified during
2442 * reslection, set the MK_MESSAGE flag in
2443 * the card's copy of the SCB.
2444 */
2445 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2446 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2447 ahc_outb(ahc, SCB_CONTROL,
2448 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2449 }
2450
2451 /*
2452 * Clear out any entries in the QINFIFO first
2453 * so we are the next SCB for this target
2454 * to run.
2455 */
2456 ahc_search_qinfifo(ahc, cmd->device->id,
2457 cmd->device->channel + 'A',
2458 cmd->device->lun, SCB_LIST_NULL,
2459 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2460 SEARCH_COMPLETE);
2461 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2462 ahc_outb(ahc, SCBPTR, saved_scbptr);
2463 ahc_print_path(ahc, pending_scb);
2464 printf("Device is disconnected, re-queuing SCB\n");
2465 wait = TRUE;
2466 } else {
2467 printf("%s:%d:%d:%d: Unable to deliver message\n",
2468 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2469 cmd->device->lun);
2470 retval = FAILED;
2471 goto done;
2472 }
2473
2474no_cmd:
2475 /*
2476 * Our assumption is that if we don't have the command, no
2477 * recovery action was required, so we return success. Again,
2478 * the semantics of the mid-layer recovery engine are not
2479 * well defined, so this may change in time.
2480 */
2481 retval = SUCCESS;
2482done:
2483 if (paused)
2484 ahc_unpause(ahc);
2485 if (wait) {
2486 struct timer_list timer;
2487 int ret;
2488
2489 ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
2490 spin_unlock_irq(&ahc->platform_data->spin_lock);
2491 init_timer(&timer);
2492 timer.data = (u_long)ahc;
2493 timer.expires = jiffies + (5 * HZ);
2494 timer.function = ahc_linux_sem_timeout;
2495 add_timer(&timer);
2496 printf("Recovery code sleeping\n");
2497 down(&ahc->platform_data->eh_sem);
2498 printf("Recovery code awake\n");
2499 ret = del_timer_sync(&timer);
2500 if (ret == 0) {
2501 printf("Timer Expired\n");
2502 retval = FAILED;
2503 }
2504 spin_lock_irq(&ahc->platform_data->spin_lock);
2505 }
1da177e4
LT		 2506 return (retval);
2507}
2508
2509void
2510ahc_platform_dump_card_state(struct ahc_softc *ahc)
2511{
1da177e4
LT		 2512}
2513
2514static void ahc_linux_exit(void);
2515
fad01ef8
JB		 2516static void ahc_linux_set_width(struct scsi_target *starget, int width)
2517{
2518 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2519 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2520 struct ahc_devinfo devinfo;
2521 unsigned long flags;
2522
2523 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2524 starget->channel + 'A', ROLE_INITIATOR);
2525 ahc_lock(ahc, &flags);
2526 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2527 ahc_unlock(ahc, &flags);
2528}
2529
92d161c3
JB		 2530static void ahc_linux_set_period(struct scsi_target *starget, int period)
2531{
2532 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2533 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2534 struct ahc_tmode_tstate *tstate;
2535 struct ahc_initiator_tinfo *tinfo
2536 = ahc_fetch_transinfo(ahc,
2537 starget->channel + 'A',
2538 shost->this_id, starget->id, &tstate);
2539 struct ahc_devinfo devinfo;
597487b9 2540 unsigned int ppr_options = tinfo->goal.ppr_options;
92d161c3 2541 unsigned long flags;
597487b9 2542 unsigned long offset = tinfo->goal.offset;
92d161c3
JB		 2543 struct ahc_syncrate *syncrate;
2544
2545 if (offset == 0)
2546 offset = MAX_OFFSET;
2547
2bf2c568
JB		 2548 if (period < 9)
2549 period = 9; /* 12.5ns is our minimum */
2550 if (period == 9)
2551 ppr_options |= MSG_EXT_PPR_DT_REQ;
2552
92d161c3
JB		 2553 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2554 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8
JB		 2555
2556 /* all PPR requests apart from QAS require wide transfers */
2557 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
fad01ef8
JB		 2558 if (spi_width(starget) == 0)
2559 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2560 }
2561
92d161c3
JB		 2562 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2563 ahc_lock(ahc, &flags);
2564 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2565 ppr_options, AHC_TRANS_GOAL, FALSE);
2566 ahc_unlock(ahc, &flags);
2567}
2568
92d161c3
JB		 2569static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2570{
2571 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2572 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2573 struct ahc_tmode_tstate *tstate;
2574 struct ahc_initiator_tinfo *tinfo
2575 = ahc_fetch_transinfo(ahc,
2576 starget->channel + 'A',
2577 shost->this_id, starget->id, &tstate);
2578 struct ahc_devinfo devinfo;
2579 unsigned int ppr_options = 0;
2580 unsigned int period = 0;
2581 unsigned long flags;
2582 struct ahc_syncrate *syncrate = NULL;
2583
2584 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2585 starget->channel + 'A', ROLE_INITIATOR);
2586 if (offset != 0) {
2587 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
597487b9
JB		 2588 period = tinfo->goal.period;
2589 ppr_options = tinfo->goal.ppr_options;
92d161c3
JB		 2590 }
2591 ahc_lock(ahc, &flags);
2592 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2593 ppr_options, AHC_TRANS_GOAL, FALSE);
2594 ahc_unlock(ahc, &flags);
2595}
2596
92d161c3
JB		 2597static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2598{
2599 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2600 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2601 struct ahc_tmode_tstate *tstate;
2602 struct ahc_initiator_tinfo *tinfo
2603 = ahc_fetch_transinfo(ahc,
2604 starget->channel + 'A',
2605 shost->this_id, starget->id, &tstate);
2606 struct ahc_devinfo devinfo;
597487b9 2607 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2608 & ~MSG_EXT_PPR_DT_REQ;
597487b9 2609 unsigned int period = tinfo->goal.period;
92d161c3
JB		 2610 unsigned long flags;
2611 struct ahc_syncrate *syncrate;
2612
2bf2c568
JB		 2613 if (dt) {
2614 period = 9; /* 12.5ns is the only period valid for DT */
2615 ppr_options |= MSG_EXT_PPR_DT_REQ;
2616 } else if (period == 9)
2617 period = 10; /* if resetting DT, period must be >= 25ns */
2618
92d161c3
JB		 2619 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2620 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2621 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
92d161c3 2622 ahc_lock(ahc, &flags);
597487b9 2623 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3
JB		 2624 ppr_options, AHC_TRANS_GOAL, FALSE);
2625 ahc_unlock(ahc, &flags);
2626}
2627
92d161c3
JB		 2628static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2629{
2630 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2631 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2632 struct ahc_tmode_tstate *tstate;
2633 struct ahc_initiator_tinfo *tinfo
2634 = ahc_fetch_transinfo(ahc,
2635 starget->channel + 'A',
2636 shost->this_id, starget->id, &tstate);
2637 struct ahc_devinfo devinfo;
597487b9 2638 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2639 & ~MSG_EXT_PPR_QAS_REQ;
597487b9 2640 unsigned int period = tinfo->goal.period;
92d161c3
JB		 2641 unsigned long flags;
2642 struct ahc_syncrate *syncrate;
2643
2644 if (qas)
2645 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2646
2647 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2648 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2649 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2650 ahc_lock(ahc, &flags);
597487b9 2651 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3
JB		 2652 ppr_options, AHC_TRANS_GOAL, FALSE);
2653 ahc_unlock(ahc, &flags);
2654}
2655
92d161c3
JB		 2656static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2657{
2658 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2659 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2660 struct ahc_tmode_tstate *tstate;
2661 struct ahc_initiator_tinfo *tinfo
2662 = ahc_fetch_transinfo(ahc,
2663 starget->channel + 'A',
2664 shost->this_id, starget->id, &tstate);
2665 struct ahc_devinfo devinfo;
597487b9 2666 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2667 & ~MSG_EXT_PPR_IU_REQ;
597487b9 2668 unsigned int period = tinfo->goal.period;
92d161c3
JB		 2669 unsigned long flags;
2670 struct ahc_syncrate *syncrate;
2671
2672 if (iu)
2673 ppr_options |= MSG_EXT_PPR_IU_REQ;
2674
2675 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2676 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2677 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2678 ahc_lock(ahc, &flags);
597487b9 2679 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3
JB		 2680 ppr_options, AHC_TRANS_GOAL, FALSE);
2681 ahc_unlock(ahc, &flags);
2682}
2683
2684static struct spi_function_template ahc_linux_transport_functions = {
92d161c3
JB		 2685 .set_offset = ahc_linux_set_offset,
2686 .show_offset = 1,
92d161c3
JB		 2687 .set_period = ahc_linux_set_period,
2688 .show_period = 1,
92d161c3
JB		 2689 .set_width = ahc_linux_set_width,
2690 .show_width = 1,
92d161c3
JB		 2691 .set_dt = ahc_linux_set_dt,
2692 .show_dt = 1,
92d161c3
JB		 2693 .set_iu = ahc_linux_set_iu,
2694 .show_iu = 1,
92d161c3
JB		 2695 .set_qas = ahc_linux_set_qas,
2696 .show_qas = 1,
2697};
2698
2699
2700
1da177e4
LT		 2701static int __init
2702ahc_linux_init(void)
2703{
92d161c3
JB		 2704 ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions);
2705 if (!ahc_linux_transport_template)
2706 return -ENODEV;
b1abb4d6
JB		 2707 scsi_transport_reserve_target(ahc_linux_transport_template,
2708 sizeof(struct ahc_linux_target));
2709 scsi_transport_reserve_device(ahc_linux_transport_template,
2710 sizeof(struct ahc_linux_device));
858eaca1
JB		 2711 if (ahc_linux_detect(&aic7xxx_driver_template))
2712 return 0;
92d161c3 2713 spi_release_transport(ahc_linux_transport_template);
1da177e4
LT		 2714 ahc_linux_exit();
2715 return -ENODEV;
1da177e4
LT		 2716}
2717
2718static void
2719ahc_linux_exit(void)
2720{
1da177e4
LT		 2721 ahc_linux_pci_exit();
2722 ahc_linux_eisa_exit();
92d161c3 2723 spi_release_transport(ahc_linux_transport_template);
1da177e4
LT		 2724}
2725
2726module_init(ahc_linux_init);
2727module_exit(ahc_linux_exit);
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