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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>
125
126static struct scsi_transport_template *ahc_linux_transport_template = NULL;
127
128#include <linux/init.h> /* __setup */
129#include <linux/mm.h> /* For fetching system memory size */
130#include <linux/blkdev.h> /* For block_size() */
131#include <linux/delay.h> /* For ssleep/msleep */
132#include <linux/slab.h>
133
134
135/*
136 * Set this to the delay in seconds after SCSI bus reset.
137 * Note, we honor this only for the initial bus reset.
138 * The scsi error recovery code performs its own bus settle
139 * delay handling for error recovery actions.
140 */
141#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
142#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
143#else
144#define AIC7XXX_RESET_DELAY 5000
145#endif
146
147/*
148 * Control collection of SCSI transfer statistics for the /proc filesystem.
149 *
150 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
151 * NOTE: This does affect performance since it has to maintain statistics.
152 */
153#ifdef CONFIG_AIC7XXX_PROC_STATS
154#define AIC7XXX_PROC_STATS
155#endif
156
157/*
158 * To change the default number of tagged transactions allowed per-device,
159 * add a line to the lilo.conf file like:
160 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
161 * which will result in the first four devices on the first two
162 * controllers being set to a tagged queue depth of 32.
163 *
164 * The tag_commands is an array of 16 to allow for wide and twin adapters.
165 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
166 * for channel 1.
167 */
168typedef struct {
169 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
170} adapter_tag_info_t;
171
172/*
173 * Modify this as you see fit for your system.
174 *
175 * 0 tagged queuing disabled
176 * 1 <= n <= 253 n == max tags ever dispatched.
177 *
178 * The driver will throttle the number of commands dispatched to a
179 * device if it returns queue full. For devices with a fixed maximum
180 * queue depth, the driver will eventually determine this depth and
181 * lock it in (a console message is printed to indicate that a lock
182 * has occurred). On some devices, queue full is returned for a temporary
183 * resource shortage. These devices will return queue full at varying
184 * depths. The driver will throttle back when the queue fulls occur and
185 * attempt to slowly increase the depth over time as the device recovers
186 * from the resource shortage.
187 *
188 * In this example, the first line will disable tagged queueing for all
189 * the devices on the first probed aic7xxx adapter.
190 *
191 * The second line enables tagged queueing with 4 commands/LUN for IDs
192 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
193 * driver to attempt to use up to 64 tags for ID 1.
194 *
195 * The third line is the same as the first line.
196 *
197 * The fourth line disables tagged queueing for devices 0 and 3. It
198 * enables tagged queueing for the other IDs, with 16 commands/LUN
199 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
200 * IDs 2, 5-7, and 9-15.
201 */
202
203/*
204 * NOTE: The below structure is for reference only, the actual structure
205 * to modify in order to change things is just below this comment block.
206adapter_tag_info_t aic7xxx_tag_info[] =
207{
208 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
209 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
210 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
211 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
212};
213*/
214
215#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
216#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
217#else
218#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
219#endif
220
221#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
222 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
223 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
224 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
225 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
226 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
227 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
228 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
229 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
230}
231
232/*
233 * By default, use the number of commands specified by
234 * the users kernel configuration.
235 */
236static adapter_tag_info_t aic7xxx_tag_info[] =
237{
238 {AIC7XXX_CONFIGED_TAG_COMMANDS},
239 {AIC7XXX_CONFIGED_TAG_COMMANDS},
240 {AIC7XXX_CONFIGED_TAG_COMMANDS},
241 {AIC7XXX_CONFIGED_TAG_COMMANDS},
242 {AIC7XXX_CONFIGED_TAG_COMMANDS},
243 {AIC7XXX_CONFIGED_TAG_COMMANDS},
244 {AIC7XXX_CONFIGED_TAG_COMMANDS},
245 {AIC7XXX_CONFIGED_TAG_COMMANDS},
246 {AIC7XXX_CONFIGED_TAG_COMMANDS},
247 {AIC7XXX_CONFIGED_TAG_COMMANDS},
248 {AIC7XXX_CONFIGED_TAG_COMMANDS},
249 {AIC7XXX_CONFIGED_TAG_COMMANDS},
250 {AIC7XXX_CONFIGED_TAG_COMMANDS},
251 {AIC7XXX_CONFIGED_TAG_COMMANDS},
252 {AIC7XXX_CONFIGED_TAG_COMMANDS},
253 {AIC7XXX_CONFIGED_TAG_COMMANDS}
254};
255
256/*
257 * There should be a specific return value for this in scsi.h, but
258 * it seems that most drivers ignore it.
259 */
260#define DID_UNDERFLOW DID_ERROR
261
262void
263ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
264{
265 printk("(scsi%d:%c:%d:%d): ",
266 ahc->platform_data->host->host_no,
267 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
268 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
269 scb != NULL ? SCB_GET_LUN(scb) : -1);
270}
271
272/*
273 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
274 * cards in the system. This should be fixed. Exceptions to this
275 * rule are noted in the comments.
276 */
277
278/*
279 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
280 * has no effect on any later resets that might occur due to things like
281 * SCSI bus timeouts.
282 */
283static uint32_t aic7xxx_no_reset;
284
285/*
286 * Should we force EXTENDED translation on a controller.
287 * 0 == Use whatever is in the SEEPROM or default to off
288 * 1 == Use whatever is in the SEEPROM or default to on
289 */
290static uint32_t aic7xxx_extended;
291
292/*
293 * PCI bus parity checking of the Adaptec controllers. This is somewhat
294 * dubious at best. To my knowledge, this option has never actually
295 * solved a PCI parity problem, but on certain machines with broken PCI
296 * chipset configurations where stray PCI transactions with bad parity are
297 * the norm rather than the exception, the error messages can be overwhelming.
298 * It's included in the driver for completeness.
299 * 0 = Shut off PCI parity check
300 * non-0 = reverse polarity pci parity checking
301 */
302static uint32_t aic7xxx_pci_parity = ~0;
303
304/*
305 * There are lots of broken chipsets in the world. Some of them will
306 * violate the PCI spec when we issue byte sized memory writes to our
307 * controller. I/O mapped register access, if allowed by the given
308 * platform, will work in almost all cases.
309 */
310uint32_t aic7xxx_allow_memio = ~0;
311
312/*
313 * So that we can set how long each device is given as a selection timeout.
314 * The table of values goes like this:
315 * 0 - 256ms
316 * 1 - 128ms
317 * 2 - 64ms
318 * 3 - 32ms
319 * We default to 256ms because some older devices need a longer time
320 * to respond to initial selection.
321 */
322static uint32_t aic7xxx_seltime;
323
324/*
325 * Certain devices do not perform any aging on commands. Should the
326 * device be saturated by commands in one portion of the disk, it is
327 * possible for transactions on far away sectors to never be serviced.
328 * To handle these devices, we can periodically send an ordered tag to
329 * force all outstanding transactions to be serviced prior to a new
330 * transaction.
331 */
332static uint32_t aic7xxx_periodic_otag;
333
334/*
335 * Module information and settable options.
336 */
337static char *aic7xxx = NULL;
338
339MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
340MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");
341MODULE_LICENSE("Dual BSD/GPL");
342MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
343module_param(aic7xxx, charp, 0444);
344MODULE_PARM_DESC(aic7xxx,
345"period-delimited options string:\n"
346" verbose Enable verbose/diagnostic logging\n"
347" allow_memio Allow device registers to be memory mapped\n"
348" debug Bitmask of debug values to enable\n"
349" no_probe Toggle EISA/VLB controller probing\n"
350" probe_eisa_vl Toggle EISA/VLB controller probing\n"
351" no_reset Suppress initial bus resets\n"
352" extended Enable extended geometry on all controllers\n"
353" periodic_otag Send an ordered tagged transaction\n"
354" periodically to prevent tag starvation.\n"
355" This may be required by some older disk\n"
356" drives or RAID arrays.\n"
357" tag_info:<tag_str> Set per-target tag depth\n"
358" global_tag_depth:<int> Global tag depth for every target\n"
359" on every bus\n"
360" seltime:<int> Selection Timeout\n"
361" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
362"\n"
363" Sample /etc/modprobe.conf line:\n"
364" Toggle EISA/VLB probing\n"
365" Set tag depth on Controller 1/Target 1 to 10 tags\n"
366" Shorten the selection timeout to 128ms\n"
367"\n"
368" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
369);
370
371static void ahc_linux_handle_scsi_status(struct ahc_softc *,
372 struct scsi_device *,
373 struct scb *);
374static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
375 struct scsi_cmnd *cmd);
376static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
377static void ahc_linux_release_simq(struct ahc_softc *ahc);
378static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
379static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
380static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
381 struct ahc_devinfo *devinfo);
382static void ahc_linux_device_queue_depth(struct scsi_device *);
383static int ahc_linux_run_command(struct ahc_softc*,
384 struct ahc_linux_device *,
385 struct scsi_cmnd *);
386static void ahc_linux_setup_tag_info_global(char *p);
387static int aic7xxx_setup(char *s);
388
389static int ahc_linux_unit;
390
391
392/************************** OS Utility Wrappers *******************************/
393void
394ahc_delay(long usec)
395{
396 /*
397 * udelay on Linux can have problems for
398 * multi-millisecond waits. Wait at most
399 * 1024us per call.
400 */
401 while (usec > 0) {
402 udelay(usec % 1024);
403 usec -= 1024;
404 }
405}
406
407/***************************** Low Level I/O **********************************/
408uint8_t
409ahc_inb(struct ahc_softc * ahc, long port)
410{
411 uint8_t x;
412
413 if (ahc->tag == BUS_SPACE_MEMIO) {
414 x = readb(ahc->bsh.maddr + port);
415 } else {
416 x = inb(ahc->bsh.ioport + port);
417 }
418 mb();
419 return (x);
420}
421
422void
423ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
424{
425 if (ahc->tag == BUS_SPACE_MEMIO) {
426 writeb(val, ahc->bsh.maddr + port);
427 } else {
428 outb(val, ahc->bsh.ioport + port);
429 }
430 mb();
431}
432
433void
434ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
435{
436 int i;
437
438 /*
439 * There is probably a more efficient way to do this on Linux
440 * but we don't use this for anything speed critical and this
441 * should work.
442 */
443 for (i = 0; i < count; i++)
444 ahc_outb(ahc, port, *array++);
445}
446
447void
448ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
449{
450 int i;
451
452 /*
453 * There is probably a more efficient way to do this on Linux
454 * but we don't use this for anything speed critical and this
455 * should work.
456 */
457 for (i = 0; i < count; i++)
458 *array++ = ahc_inb(ahc, port);
459}
460
461/********************************* Inlines ************************************/
462static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
463
464static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
465 struct ahc_dma_seg *sg,
466 dma_addr_t addr, bus_size_t len);
467
468static void
469ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
470{
471 struct scsi_cmnd *cmd;
472
473 cmd = scb->io_ctx;
474 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
475
476 scsi_dma_unmap(cmd);
477}
478
479static int
480ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
481 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
482{
483 int consumed;
484
485 if ((scb->sg_count + 1) > AHC_NSEG)
486 panic("Too few segs for dma mapping. "
487 "Increase AHC_NSEG\n");
488
489 consumed = 1;
490 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
491 scb->platform_data->xfer_len += len;
492
493 if (sizeof(dma_addr_t) > 4
494 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
495 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
496
497 sg->len = ahc_htole32(len);
498 return (consumed);
499}
500
501/*
502 * Return a string describing the driver.
503 */
504static const char *
505ahc_linux_info(struct Scsi_Host *host)
506{
507 static char buffer[512];
508 char ahc_info[256];
509 char *bp;
510 struct ahc_softc *ahc;
511
512 bp = &buffer[0];
513 ahc = *(struct ahc_softc **)host->hostdata;
514 memset(bp, 0, sizeof(buffer));
515 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n"
516 " <");
517 strcat(bp, ahc->description);
518 strcat(bp, ">\n"
519 " ");
520 ahc_controller_info(ahc, ahc_info);
521 strcat(bp, ahc_info);
522 strcat(bp, "\n");
523
524 return (bp);
525}
526
527/*
528 * Queue an SCB to the controller.
529 */
530static int
531ahc_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
532{
533 struct ahc_softc *ahc;
534 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
535 int rtn = SCSI_MLQUEUE_HOST_BUSY;
536 unsigned long flags;
537
538 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
539
540 ahc_lock(ahc, &flags);
541 if (ahc->platform_data->qfrozen == 0) {
542 cmd->scsi_done = scsi_done;
543 cmd->result = CAM_REQ_INPROG << 16;
544 rtn = ahc_linux_run_command(ahc, dev, cmd);
545 }
546 ahc_unlock(ahc, &flags);
547
548 return rtn;
549}
550
551static DEF_SCSI_QCMD(ahc_linux_queue)
552
553static inline struct scsi_target **
554ahc_linux_target_in_softc(struct scsi_target *starget)
555{
556 struct ahc_softc *ahc =
557 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
558 unsigned int target_offset;
559
560 target_offset = starget->id;
561 if (starget->channel != 0)
562 target_offset += 8;
563
564 return &ahc->platform_data->starget[target_offset];
565}
566
567static int
568ahc_linux_target_alloc(struct scsi_target *starget)
569{
570 struct ahc_softc *ahc =
571 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
572 struct seeprom_config *sc = ahc->seep_config;
573 unsigned long flags;
574 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
575 unsigned short scsirate;
576 struct ahc_devinfo devinfo;
577 struct ahc_initiator_tinfo *tinfo;
578 struct ahc_tmode_tstate *tstate;
579 char channel = starget->channel + 'A';
580 unsigned int our_id = ahc->our_id;
581 unsigned int target_offset;
582
583 target_offset = starget->id;
584 if (starget->channel != 0)
585 target_offset += 8;
586
587 if (starget->channel)
588 our_id = ahc->our_id_b;
589
590 ahc_lock(ahc, &flags);
591
592 BUG_ON(*ahc_targp != NULL);
593
594 *ahc_targp = starget;
595
596 if (sc) {
597 int maxsync = AHC_SYNCRATE_DT;
598 int ultra = 0;
599 int flags = sc->device_flags[target_offset];
600
601 if (ahc->flags & AHC_NEWEEPROM_FMT) {
602 if (flags & CFSYNCHISULTRA)
603 ultra = 1;
604 } else if (flags & CFULTRAEN)
605 ultra = 1;
606 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
607 * change it to ultra=0, CFXFER = 0 */
608 if(ultra && (flags & CFXFER) == 0x04) {
609 ultra = 0;
610 flags &= ~CFXFER;
611 }
612
613 if ((ahc->features & AHC_ULTRA2) != 0) {
614 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
615 } else {
616 scsirate = (flags & CFXFER) << 4;
617 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
618 AHC_SYNCRATE_FAST;
619 }
620 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
621 if (!(flags & CFSYNCH))
622 spi_max_offset(starget) = 0;
623 spi_min_period(starget) =
624 ahc_find_period(ahc, scsirate, maxsync);
625
626 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
627 starget->id, &tstate);
628 }
629 ahc_compile_devinfo(&devinfo, our_id, starget->id,
630 CAM_LUN_WILDCARD, channel,
631 ROLE_INITIATOR);
632 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
633 AHC_TRANS_GOAL, /*paused*/FALSE);
634 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
635 AHC_TRANS_GOAL, /*paused*/FALSE);
636 ahc_unlock(ahc, &flags);
637
638 return 0;
639}
640
641static void
642ahc_linux_target_destroy(struct scsi_target *starget)
643{
644 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
645
646 *ahc_targp = NULL;
647}
648
649static int
650ahc_linux_slave_alloc(struct scsi_device *sdev)
651{
652 struct ahc_softc *ahc =
653 *((struct ahc_softc **)sdev->host->hostdata);
654 struct scsi_target *starget = sdev->sdev_target;
655 struct ahc_linux_device *dev;
656
657 if (bootverbose)
658 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
659
660 dev = scsi_transport_device_data(sdev);
661 memset(dev, 0, sizeof(*dev));
662
663 /*
664 * We start out life using untagged
665 * transactions of which we allow one.
666 */
667 dev->openings = 1;
668
669 /*
670 * Set maxtags to 0. This will be changed if we
671 * later determine that we are dealing with
672 * a tagged queuing capable device.
673 */
674 dev->maxtags = 0;
675
676 spi_period(starget) = 0;
677
678 return 0;
679}
680
681static int
682ahc_linux_slave_configure(struct scsi_device *sdev)
683{
684 struct ahc_softc *ahc;
685
686 ahc = *((struct ahc_softc **)sdev->host->hostdata);
687
688 if (bootverbose)
689 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
690
691 ahc_linux_device_queue_depth(sdev);
692
693 /* Initial Domain Validation */
694 if (!spi_initial_dv(sdev->sdev_target))
695 spi_dv_device(sdev);
696
697 return 0;
698}
699
700#if defined(__i386__)
701/*
702 * Return the disk geometry for the given SCSI device.
703 */
704static int
705ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
706 sector_t capacity, int geom[])
707{
708 uint8_t *bh;
709 int heads;
710 int sectors;
711 int cylinders;
712 int ret;
713 int extended;
714 struct ahc_softc *ahc;
715 u_int channel;
716
717 ahc = *((struct ahc_softc **)sdev->host->hostdata);
718 channel = sdev_channel(sdev);
719
720 bh = scsi_bios_ptable(bdev);
721 if (bh) {
722 ret = scsi_partsize(bh, capacity,
723 &geom[2], &geom[0], &geom[1]);
724 kfree(bh);
725 if (ret != -1)
726 return (ret);
727 }
728 heads = 64;
729 sectors = 32;
730 cylinders = aic_sector_div(capacity, heads, sectors);
731
732 if (aic7xxx_extended != 0)
733 extended = 1;
734 else if (channel == 0)
735 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
736 else
737 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
738 if (extended && cylinders >= 1024) {
739 heads = 255;
740 sectors = 63;
741 cylinders = aic_sector_div(capacity, heads, sectors);
742 }
743 geom[0] = heads;
744 geom[1] = sectors;
745 geom[2] = cylinders;
746 return (0);
747}
748#endif
749
750/*
751 * Abort the current SCSI command(s).
752 */
753static int
754ahc_linux_abort(struct scsi_cmnd *cmd)
755{
756 int error;
757
758 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
759 if (error != 0)
760 printk("aic7xxx_abort returns 0x%x\n", error);
761 return (error);
762}
763
764/*
765 * Attempt to send a target reset message to the device that timed out.
766 */
767static int
768ahc_linux_dev_reset(struct scsi_cmnd *cmd)
769{
770 int error;
771
772 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
773 if (error != 0)
774 printk("aic7xxx_dev_reset returns 0x%x\n", error);
775 return (error);
776}
777
778/*
779 * Reset the SCSI bus.
780 */
781static int
782ahc_linux_bus_reset(struct scsi_cmnd *cmd)
783{
784 struct ahc_softc *ahc;
785 int found;
786 unsigned long flags;
787
788 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
789
790 ahc_lock(ahc, &flags);
791 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
792 /*initiate reset*/TRUE);
793 ahc_unlock(ahc, &flags);
794
795 if (bootverbose)
796 printk("%s: SCSI bus reset delivered. "
797 "%d SCBs aborted.\n", ahc_name(ahc), found);
798
799 return SUCCESS;
800}
801
802struct scsi_host_template aic7xxx_driver_template = {
803 .module = THIS_MODULE,
804 .name = "aic7xxx",
805 .proc_name = "aic7xxx",
806 .proc_info = ahc_linux_proc_info,
807 .info = ahc_linux_info,
808 .queuecommand = ahc_linux_queue,
809 .eh_abort_handler = ahc_linux_abort,
810 .eh_device_reset_handler = ahc_linux_dev_reset,
811 .eh_bus_reset_handler = ahc_linux_bus_reset,
812#if defined(__i386__)
813 .bios_param = ahc_linux_biosparam,
814#endif
815 .can_queue = AHC_MAX_QUEUE,
816 .this_id = -1,
817 .max_sectors = 8192,
818 .cmd_per_lun = 2,
819 .use_clustering = ENABLE_CLUSTERING,
820 .slave_alloc = ahc_linux_slave_alloc,
821 .slave_configure = ahc_linux_slave_configure,
822 .target_alloc = ahc_linux_target_alloc,
823 .target_destroy = ahc_linux_target_destroy,
824};
825
826/**************************** Tasklet Handler *********************************/
827
828/******************************** Macros **************************************/
829#define BUILD_SCSIID(ahc, cmd) \
830 ((((cmd)->device->id << TID_SHIFT) & TID) \
831 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
832 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
833
834/******************************** Bus DMA *************************************/
835int
836ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
837 bus_size_t alignment, bus_size_t boundary,
838 dma_addr_t lowaddr, dma_addr_t highaddr,
839 bus_dma_filter_t *filter, void *filterarg,
840 bus_size_t maxsize, int nsegments,
841 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
842{
843 bus_dma_tag_t dmat;
844
845 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
846 if (dmat == NULL)
847 return (ENOMEM);
848
849 /*
850 * Linux is very simplistic about DMA memory. For now don't
851 * maintain all specification information. Once Linux supplies
852 * better facilities for doing these operations, or the
853 * needs of this particular driver change, we might need to do
854 * more here.
855 */
856 dmat->alignment = alignment;
857 dmat->boundary = boundary;
858 dmat->maxsize = maxsize;
859 *ret_tag = dmat;
860 return (0);
861}
862
863void
864ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
865{
866 kfree(dmat);
867}
868
869int
870ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
871 int flags, bus_dmamap_t *mapp)
872{
873 *vaddr = pci_alloc_consistent(ahc->dev_softc,
874 dmat->maxsize, mapp);
875 if (*vaddr == NULL)
876 return ENOMEM;
877 return 0;
878}
879
880void
881ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
882 void* vaddr, bus_dmamap_t map)
883{
884 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
885 vaddr, map);
886}
887
888int
889ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
890 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
891 void *cb_arg, int flags)
892{
893 /*
894 * Assume for now that this will only be used during
895 * initialization and not for per-transaction buffer mapping.
896 */
897 bus_dma_segment_t stack_sg;
898
899 stack_sg.ds_addr = map;
900 stack_sg.ds_len = dmat->maxsize;
901 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
902 return (0);
903}
904
905void
906ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
907{
908}
909
910int
911ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
912{
913 /* Nothing to do */
914 return (0);
915}
916
917static void
918ahc_linux_setup_tag_info_global(char *p)
919{
920 int tags, i, j;
921
922 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
923 printk("Setting Global Tags= %d\n", tags);
924
925 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
926 for (j = 0; j < AHC_NUM_TARGETS; j++) {
927 aic7xxx_tag_info[i].tag_commands[j] = tags;
928 }
929 }
930}
931
932static void
933ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
934{
935
936 if ((instance >= 0) && (targ >= 0)
937 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
938 && (targ < AHC_NUM_TARGETS)) {
939 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
940 if (bootverbose)
941 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
942 }
943}
944
945static char *
946ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
947 void (*callback)(u_long, int, int, int32_t),
948 u_long callback_arg)
949{
950 char *tok_end;
951 char *tok_end2;
952 int i;
953 int instance;
954 int targ;
955 int done;
956 char tok_list[] = {'.', ',', '{', '}', '\0'};
957
958 /* All options use a ':' name/arg separator */
959 if (*opt_arg != ':')
960 return (opt_arg);
961 opt_arg++;
962 instance = -1;
963 targ = -1;
964 done = FALSE;
965 /*
966 * Restore separator that may be in
967 * the middle of our option argument.
968 */
969 tok_end = strchr(opt_arg, '\0');
970 if (tok_end < end)
971 *tok_end = ',';
972 while (!done) {
973 switch (*opt_arg) {
974 case '{':
975 if (instance == -1) {
976 instance = 0;
977 } else {
978 if (depth > 1) {
979 if (targ == -1)
980 targ = 0;
981 } else {
982 printk("Malformed Option %s\n",
983 opt_name);
984 done = TRUE;
985 }
986 }
987 opt_arg++;
988 break;
989 case '}':
990 if (targ != -1)
991 targ = -1;
992 else if (instance != -1)
993 instance = -1;
994 opt_arg++;
995 break;
996 case ',':
997 case '.':
998 if (instance == -1)
999 done = TRUE;
1000 else if (targ >= 0)
1001 targ++;
1002 else if (instance >= 0)
1003 instance++;
1004 opt_arg++;
1005 break;
1006 case '\0':
1007 done = TRUE;
1008 break;
1009 default:
1010 tok_end = end;
1011 for (i = 0; tok_list[i]; i++) {
1012 tok_end2 = strchr(opt_arg, tok_list[i]);
1013 if ((tok_end2) && (tok_end2 < tok_end))
1014 tok_end = tok_end2;
1015 }
1016 callback(callback_arg, instance, targ,
1017 simple_strtol(opt_arg, NULL, 0));
1018 opt_arg = tok_end;
1019 break;
1020 }
1021 }
1022 return (opt_arg);
1023}
1024
1025/*
1026 * Handle Linux boot parameters. This routine allows for assigning a value
1027 * to a parameter with a ':' between the parameter and the value.
1028 * ie. aic7xxx=stpwlev:1,extended
1029 */
1030static int
1031aic7xxx_setup(char *s)
1032{
1033 int i, n;
1034 char *p;
1035 char *end;
1036
1037 static const struct {
1038 const char *name;
1039 uint32_t *flag;
1040 } options[] = {
1041 { "extended", &aic7xxx_extended },
1042 { "no_reset", &aic7xxx_no_reset },
1043 { "verbose", &aic7xxx_verbose },
1044 { "allow_memio", &aic7xxx_allow_memio},
1045#ifdef AHC_DEBUG
1046 { "debug", &ahc_debug },
1047#endif
1048 { "periodic_otag", &aic7xxx_periodic_otag },
1049 { "pci_parity", &aic7xxx_pci_parity },
1050 { "seltime", &aic7xxx_seltime },
1051 { "tag_info", NULL },
1052 { "global_tag_depth", NULL },
1053 { "dv", NULL }
1054 };
1055
1056 end = strchr(s, '\0');
1057
1058 /*
1059 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1060 * will never be 0 in this case.
1061 */
1062 n = 0;
1063
1064 while ((p = strsep(&s, ",.")) != NULL) {
1065 if (*p == '\0')
1066 continue;
1067 for (i = 0; i < ARRAY_SIZE(options); i++) {
1068
1069 n = strlen(options[i].name);
1070 if (strncmp(options[i].name, p, n) == 0)
1071 break;
1072 }
1073 if (i == ARRAY_SIZE(options))
1074 continue;
1075
1076 if (strncmp(p, "global_tag_depth", n) == 0) {
1077 ahc_linux_setup_tag_info_global(p + n);
1078 } else if (strncmp(p, "tag_info", n) == 0) {
1079 s = ahc_parse_brace_option("tag_info", p + n, end,
1080 2, ahc_linux_setup_tag_info, 0);
1081 } else if (p[n] == ':') {
1082 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1083 } else if (strncmp(p, "verbose", n) == 0) {
1084 *(options[i].flag) = 1;
1085 } else {
1086 *(options[i].flag) ^= 0xFFFFFFFF;
1087 }
1088 }
1089 return 1;
1090}
1091
1092__setup("aic7xxx=", aic7xxx_setup);
1093
1094uint32_t aic7xxx_verbose;
1095
1096int
1097ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1098{
1099 char buf[80];
1100 struct Scsi_Host *host;
1101 char *new_name;
1102 u_long s;
1103 int retval;
1104
1105 template->name = ahc->description;
1106 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1107 if (host == NULL)
1108 return (ENOMEM);
1109
1110 *((struct ahc_softc **)host->hostdata) = ahc;
1111 ahc->platform_data->host = host;
1112 host->can_queue = AHC_MAX_QUEUE;
1113 host->cmd_per_lun = 2;
1114 /* XXX No way to communicate the ID for multiple channels */
1115 host->this_id = ahc->our_id;
1116 host->irq = ahc->platform_data->irq;
1117 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1118 host->max_lun = AHC_NUM_LUNS;
1119 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1120 host->sg_tablesize = AHC_NSEG;
1121 ahc_lock(ahc, &s);
1122 ahc_set_unit(ahc, ahc_linux_unit++);
1123 ahc_unlock(ahc, &s);
1124 sprintf(buf, "scsi%d", host->host_no);
1125 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1126 if (new_name != NULL) {
1127 strcpy(new_name, buf);
1128 ahc_set_name(ahc, new_name);
1129 }
1130 host->unique_id = ahc->unit;
1131 ahc_linux_initialize_scsi_bus(ahc);
1132 ahc_intr_enable(ahc, TRUE);
1133
1134 host->transportt = ahc_linux_transport_template;
1135
1136 retval = scsi_add_host(host,
1137 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
1138 if (retval) {
1139 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1140 scsi_host_put(host);
1141 return retval;
1142 }
1143
1144 scsi_scan_host(host);
1145 return 0;
1146}
1147
1148/*
1149 * Place the SCSI bus into a known state by either resetting it,
1150 * or forcing transfer negotiations on the next command to any
1151 * target.
1152 */
1153void
1154ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1155{
1156 int i;
1157 int numtarg;
1158 unsigned long s;
1159
1160 i = 0;
1161 numtarg = 0;
1162
1163 ahc_lock(ahc, &s);
1164
1165 if (aic7xxx_no_reset != 0)
1166 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1167
1168 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1169 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1170 else
1171 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1172
1173 if ((ahc->features & AHC_TWIN) != 0) {
1174
1175 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1176 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1177 } else {
1178 if (numtarg == 0)
1179 i = 8;
1180 numtarg += 8;
1181 }
1182 }
1183
1184 /*
1185 * Force negotiation to async for all targets that
1186 * will not see an initial bus reset.
1187 */
1188 for (; i < numtarg; i++) {
1189 struct ahc_devinfo devinfo;
1190 struct ahc_initiator_tinfo *tinfo;
1191 struct ahc_tmode_tstate *tstate;
1192 u_int our_id;
1193 u_int target_id;
1194 char channel;
1195
1196 channel = 'A';
1197 our_id = ahc->our_id;
1198 target_id = i;
1199 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1200 channel = 'B';
1201 our_id = ahc->our_id_b;
1202 target_id = i % 8;
1203 }
1204 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1205 target_id, &tstate);
1206 ahc_compile_devinfo(&devinfo, our_id, target_id,
1207 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1208 ahc_update_neg_request(ahc, &devinfo, tstate,
1209 tinfo, AHC_NEG_ALWAYS);
1210 }
1211 ahc_unlock(ahc, &s);
1212 /* Give the bus some time to recover */
1213 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1214 ahc_linux_freeze_simq(ahc);
1215 msleep(AIC7XXX_RESET_DELAY);
1216 ahc_linux_release_simq(ahc);
1217 }
1218}
1219
1220int
1221ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1222{
1223
1224 ahc->platform_data =
1225 kmalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
1226 if (ahc->platform_data == NULL)
1227 return (ENOMEM);
1228 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1229 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1230 ahc_lockinit(ahc);
1231 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1232 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1233 if (aic7xxx_pci_parity == 0)
1234 ahc->flags |= AHC_DISABLE_PCI_PERR;
1235
1236 return (0);
1237}
1238
1239void
1240ahc_platform_free(struct ahc_softc *ahc)
1241{
1242 struct scsi_target *starget;
1243 int i;
1244
1245 if (ahc->platform_data != NULL) {
1246 /* destroy all of the device and target objects */
1247 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1248 starget = ahc->platform_data->starget[i];
1249 if (starget != NULL) {
1250 ahc->platform_data->starget[i] = NULL;
1251 }
1252 }
1253
1254 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1255 free_irq(ahc->platform_data->irq, ahc);
1256 if (ahc->tag == BUS_SPACE_PIO
1257 && ahc->bsh.ioport != 0)
1258 release_region(ahc->bsh.ioport, 256);
1259 if (ahc->tag == BUS_SPACE_MEMIO
1260 && ahc->bsh.maddr != NULL) {
1261 iounmap(ahc->bsh.maddr);
1262 release_mem_region(ahc->platform_data->mem_busaddr,
1263 0x1000);
1264 }
1265
1266 if (ahc->platform_data->host)
1267 scsi_host_put(ahc->platform_data->host);
1268
1269 kfree(ahc->platform_data);
1270 }
1271}
1272
1273void
1274ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1275{
1276 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1277 SCB_GET_CHANNEL(ahc, scb),
1278 SCB_GET_LUN(scb), SCB_LIST_NULL,
1279 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1280}
1281
1282void
1283ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1284 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1285{
1286 struct ahc_linux_device *dev;
1287 int was_queuing;
1288 int now_queuing;
1289
1290 if (sdev == NULL)
1291 return;
1292 dev = scsi_transport_device_data(sdev);
1293
1294 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1295 switch (alg) {
1296 default:
1297 case AHC_QUEUE_NONE:
1298 now_queuing = 0;
1299 break;
1300 case AHC_QUEUE_BASIC:
1301 now_queuing = AHC_DEV_Q_BASIC;
1302 break;
1303 case AHC_QUEUE_TAGGED:
1304 now_queuing = AHC_DEV_Q_TAGGED;
1305 break;
1306 }
1307 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1308 && (was_queuing != now_queuing)
1309 && (dev->active != 0)) {
1310 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1311 dev->qfrozen++;
1312 }
1313
1314 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1315 if (now_queuing) {
1316 u_int usertags;
1317
1318 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1319 if (!was_queuing) {
1320 /*
1321 * Start out aggressively and allow our
1322 * dynamic queue depth algorithm to take
1323 * care of the rest.
1324 */
1325 dev->maxtags = usertags;
1326 dev->openings = dev->maxtags - dev->active;
1327 }
1328 if (dev->maxtags == 0) {
1329 /*
1330 * Queueing is disabled by the user.
1331 */
1332 dev->openings = 1;
1333 } else if (alg == AHC_QUEUE_TAGGED) {
1334 dev->flags |= AHC_DEV_Q_TAGGED;
1335 if (aic7xxx_periodic_otag != 0)
1336 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1337 } else
1338 dev->flags |= AHC_DEV_Q_BASIC;
1339 } else {
1340 /* We can only have one opening. */
1341 dev->maxtags = 0;
1342 dev->openings = 1 - dev->active;
1343 }
1344 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1345 case AHC_DEV_Q_BASIC:
1346 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
1347 scsi_activate_tcq(sdev, dev->openings + dev->active);
1348 break;
1349 case AHC_DEV_Q_TAGGED:
1350 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
1351 scsi_activate_tcq(sdev, dev->openings + dev->active);
1352 break;
1353 default:
1354 /*
1355 * We allow the OS to queue 2 untagged transactions to
1356 * us at any time even though we can only execute them
1357 * serially on the controller/device. This should
1358 * remove some latency.
1359 */
1360 scsi_deactivate_tcq(sdev, 2);
1361 break;
1362 }
1363}
1364
1365int
1366ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1367 int lun, u_int tag, role_t role, uint32_t status)
1368{
1369 return 0;
1370}
1371
1372static u_int
1373ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1374{
1375 static int warned_user;
1376 u_int tags;
1377
1378 tags = 0;
1379 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1380 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
1381 if (warned_user == 0) {
1382
1383 printk(KERN_WARNING
1384"aic7xxx: WARNING: Insufficient tag_info instances\n"
1385"aic7xxx: for installed controllers. Using defaults\n"
1386"aic7xxx: Please update the aic7xxx_tag_info array in\n"
1387"aic7xxx: the aic7xxx_osm..c source file.\n");
1388 warned_user++;
1389 }
1390 tags = AHC_MAX_QUEUE;
1391 } else {
1392 adapter_tag_info_t *tag_info;
1393
1394 tag_info = &aic7xxx_tag_info[ahc->unit];
1395 tags = tag_info->tag_commands[devinfo->target_offset];
1396 if (tags > AHC_MAX_QUEUE)
1397 tags = AHC_MAX_QUEUE;
1398 }
1399 }
1400 return (tags);
1401}
1402
1403/*
1404 * Determines the queue depth for a given device.
1405 */
1406static void
1407ahc_linux_device_queue_depth(struct scsi_device *sdev)
1408{
1409 struct ahc_devinfo devinfo;
1410 u_int tags;
1411 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1412
1413 ahc_compile_devinfo(&devinfo,
1414 sdev->sdev_target->channel == 0
1415 ? ahc->our_id : ahc->our_id_b,
1416 sdev->sdev_target->id, sdev->lun,
1417 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1418 ROLE_INITIATOR);
1419 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1420 if (tags != 0 && sdev->tagged_supported != 0) {
1421
1422 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1423 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1424 devinfo.lun, AC_TRANSFER_NEG);
1425 ahc_print_devinfo(ahc, &devinfo);
1426 printk("Tagged Queuing enabled. Depth %d\n", tags);
1427 } else {
1428 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1429 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1430 devinfo.lun, AC_TRANSFER_NEG);
1431 }
1432}
1433
1434static int
1435ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1436 struct scsi_cmnd *cmd)
1437{
1438 struct scb *scb;
1439 struct hardware_scb *hscb;
1440 struct ahc_initiator_tinfo *tinfo;
1441 struct ahc_tmode_tstate *tstate;
1442 uint16_t mask;
1443 struct scb_tailq *untagged_q = NULL;
1444 int nseg;
1445
1446 /*
1447 * Schedule us to run later. The only reason we are not
1448 * running is because the whole controller Q is frozen.
1449 */
1450 if (ahc->platform_data->qfrozen != 0)
1451 return SCSI_MLQUEUE_HOST_BUSY;
1452
1453 /*
1454 * We only allow one untagged transaction
1455 * per target in the initiator role unless
1456 * we are storing a full busy target *lun*
1457 * table in SCB space.
1458 */
1459 if (!blk_rq_tagged(cmd->request)
1460 && (ahc->features & AHC_SCB_BTT) == 0) {
1461 int target_offset;
1462
1463 target_offset = cmd->device->id + cmd->device->channel * 8;
1464 untagged_q = &(ahc->untagged_queues[target_offset]);
1465 if (!TAILQ_EMPTY(untagged_q))
1466 /* if we're already executing an untagged command
1467 * we're busy to another */
1468 return SCSI_MLQUEUE_DEVICE_BUSY;
1469 }
1470
1471 nseg = scsi_dma_map(cmd);
1472 if (nseg < 0)
1473 return SCSI_MLQUEUE_HOST_BUSY;
1474
1475 /*
1476 * Get an scb to use.
1477 */
1478 scb = ahc_get_scb(ahc);
1479 if (!scb) {
1480 scsi_dma_unmap(cmd);
1481 return SCSI_MLQUEUE_HOST_BUSY;
1482 }
1483
1484 scb->io_ctx = cmd;
1485 scb->platform_data->dev = dev;
1486 hscb = scb->hscb;
1487 cmd->host_scribble = (char *)scb;
1488
1489 /*
1490 * Fill out basics of the HSCB.
1491 */
1492 hscb->control = 0;
1493 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1494 hscb->lun = cmd->device->lun;
1495 mask = SCB_GET_TARGET_MASK(ahc, scb);
1496 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1497 SCB_GET_OUR_ID(scb),
1498 SCB_GET_TARGET(ahc, scb), &tstate);
1499 hscb->scsirate = tinfo->scsirate;
1500 hscb->scsioffset = tinfo->curr.offset;
1501 if ((tstate->ultraenb & mask) != 0)
1502 hscb->control |= ULTRAENB;
1503
1504 if ((ahc->user_discenable & mask) != 0)
1505 hscb->control |= DISCENB;
1506
1507 if ((tstate->auto_negotiate & mask) != 0) {
1508 scb->flags |= SCB_AUTO_NEGOTIATE;
1509 scb->hscb->control |= MK_MESSAGE;
1510 }
1511
1512 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1513 int msg_bytes;
1514 uint8_t tag_msgs[2];
1515
1516 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1517 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1518 hscb->control |= tag_msgs[0];
1519 if (tag_msgs[0] == MSG_ORDERED_TASK)
1520 dev->commands_since_idle_or_otag = 0;
1521 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1522 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1523 hscb->control |= MSG_ORDERED_TASK;
1524 dev->commands_since_idle_or_otag = 0;
1525 } else {
1526 hscb->control |= MSG_SIMPLE_TASK;
1527 }
1528 }
1529
1530 hscb->cdb_len = cmd->cmd_len;
1531 if (hscb->cdb_len <= 12) {
1532 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1533 } else {
1534 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1535 scb->flags |= SCB_CDB32_PTR;
1536 }
1537
1538 scb->platform_data->xfer_len = 0;
1539 ahc_set_residual(scb, 0);
1540 ahc_set_sense_residual(scb, 0);
1541 scb->sg_count = 0;
1542
1543 if (nseg > 0) {
1544 struct ahc_dma_seg *sg;
1545 struct scatterlist *cur_seg;
1546 int i;
1547
1548 /* Copy the segments into the SG list. */
1549 sg = scb->sg_list;
1550 /*
1551 * The sg_count may be larger than nseg if
1552 * a transfer crosses a 32bit page.
1553 */
1554 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1555 dma_addr_t addr;
1556 bus_size_t len;
1557 int consumed;
1558
1559 addr = sg_dma_address(cur_seg);
1560 len = sg_dma_len(cur_seg);
1561 consumed = ahc_linux_map_seg(ahc, scb,
1562 sg, addr, len);
1563 sg += consumed;
1564 scb->sg_count += consumed;
1565 }
1566 sg--;
1567 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1568
1569 /*
1570 * Reset the sg list pointer.
1571 */
1572 scb->hscb->sgptr =
1573 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1574
1575 /*
1576 * Copy the first SG into the "current"
1577 * data pointer area.
1578 */
1579 scb->hscb->dataptr = scb->sg_list->addr;
1580 scb->hscb->datacnt = scb->sg_list->len;
1581 } else {
1582 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1583 scb->hscb->dataptr = 0;
1584 scb->hscb->datacnt = 0;
1585 scb->sg_count = 0;
1586 }
1587
1588 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1589 dev->openings--;
1590 dev->active++;
1591 dev->commands_issued++;
1592 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1593 dev->commands_since_idle_or_otag++;
1594
1595 scb->flags |= SCB_ACTIVE;
1596 if (untagged_q) {
1597 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1598 scb->flags |= SCB_UNTAGGEDQ;
1599 }
1600 ahc_queue_scb(ahc, scb);
1601 return 0;
1602}
1603
1604/*
1605 * SCSI controller interrupt handler.
1606 */
1607irqreturn_t
1608ahc_linux_isr(int irq, void *dev_id)
1609{
1610 struct ahc_softc *ahc;
1611 u_long flags;
1612 int ours;
1613
1614 ahc = (struct ahc_softc *) dev_id;
1615 ahc_lock(ahc, &flags);
1616 ours = ahc_intr(ahc);
1617 ahc_unlock(ahc, &flags);
1618 return IRQ_RETVAL(ours);
1619}
1620
1621void
1622ahc_platform_flushwork(struct ahc_softc *ahc)
1623{
1624
1625}
1626
1627void
1628ahc_send_async(struct ahc_softc *ahc, char channel,
1629 u_int target, u_int lun, ac_code code)
1630{
1631 switch (code) {
1632 case AC_TRANSFER_NEG:
1633 {
1634 char buf[80];
1635 struct scsi_target *starget;
1636 struct ahc_linux_target *targ;
1637 struct info_str info;
1638 struct ahc_initiator_tinfo *tinfo;
1639 struct ahc_tmode_tstate *tstate;
1640 int target_offset;
1641 unsigned int target_ppr_options;
1642
1643 BUG_ON(target == CAM_TARGET_WILDCARD);
1644
1645 info.buffer = buf;
1646 info.length = sizeof(buf);
1647 info.offset = 0;
1648 info.pos = 0;
1649 tinfo = ahc_fetch_transinfo(ahc, channel,
1650 channel == 'A' ? ahc->our_id
1651 : ahc->our_id_b,
1652 target, &tstate);
1653
1654 /*
1655 * Don't bother reporting results while
1656 * negotiations are still pending.
1657 */
1658 if (tinfo->curr.period != tinfo->goal.period
1659 || tinfo->curr.width != tinfo->goal.width
1660 || tinfo->curr.offset != tinfo->goal.offset
1661 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1662 if (bootverbose == 0)
1663 break;
1664
1665 /*
1666 * Don't bother reporting results that
1667 * are identical to those last reported.
1668 */
1669 target_offset = target;
1670 if (channel == 'B')
1671 target_offset += 8;
1672 starget = ahc->platform_data->starget[target_offset];
1673 if (starget == NULL)
1674 break;
1675 targ = scsi_transport_target_data(starget);
1676
1677 target_ppr_options =
1678 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1679 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1680 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1681
1682 if (tinfo->curr.period == spi_period(starget)
1683 && tinfo->curr.width == spi_width(starget)
1684 && tinfo->curr.offset == spi_offset(starget)
1685 && tinfo->curr.ppr_options == target_ppr_options)
1686 if (bootverbose == 0)
1687 break;
1688
1689 spi_period(starget) = tinfo->curr.period;
1690 spi_width(starget) = tinfo->curr.width;
1691 spi_offset(starget) = tinfo->curr.offset;
1692 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1693 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1694 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1695 spi_display_xfer_agreement(starget);
1696 break;
1697 }
1698 case AC_SENT_BDR:
1699 {
1700 WARN_ON(lun != CAM_LUN_WILDCARD);
1701 scsi_report_device_reset(ahc->platform_data->host,
1702 channel - 'A', target);
1703 break;
1704 }
1705 case AC_BUS_RESET:
1706 if (ahc->platform_data->host != NULL) {
1707 scsi_report_bus_reset(ahc->platform_data->host,
1708 channel - 'A');
1709 }
1710 break;
1711 default:
1712 panic("ahc_send_async: Unexpected async event");
1713 }
1714}
1715
1716/*
1717 * Calls the higher level scsi done function and frees the scb.
1718 */
1719void
1720ahc_done(struct ahc_softc *ahc, struct scb *scb)
1721{
1722 struct scsi_cmnd *cmd;
1723 struct ahc_linux_device *dev;
1724
1725 LIST_REMOVE(scb, pending_links);
1726 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1727 struct scb_tailq *untagged_q;
1728 int target_offset;
1729
1730 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1731 untagged_q = &(ahc->untagged_queues[target_offset]);
1732 TAILQ_REMOVE(untagged_q, scb, links.tqe);
1733 BUG_ON(!TAILQ_EMPTY(untagged_q));
1734 } else if ((scb->flags & SCB_ACTIVE) == 0) {
1735 /*
1736 * Transactions aborted from the untagged queue may
1737 * not have been dispatched to the controller, so
1738 * only check the SCB_ACTIVE flag for tagged transactions.
1739 */
1740 printk("SCB %d done'd twice\n", scb->hscb->tag);
1741 ahc_dump_card_state(ahc);
1742 panic("Stopping for safety");
1743 }
1744 cmd = scb->io_ctx;
1745 dev = scb->platform_data->dev;
1746 dev->active--;
1747 dev->openings++;
1748 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1749 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1750 dev->qfrozen--;
1751 }
1752 ahc_linux_unmap_scb(ahc, scb);
1753
1754 /*
1755 * Guard against stale sense data.
1756 * The Linux mid-layer assumes that sense
1757 * was retrieved anytime the first byte of
1758 * the sense buffer looks "sane".
1759 */
1760 cmd->sense_buffer[0] = 0;
1761 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1762 uint32_t amount_xferred;
1763
1764 amount_xferred =
1765 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1766 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1767#ifdef AHC_DEBUG
1768 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1769 ahc_print_path(ahc, scb);
1770 printk("Set CAM_UNCOR_PARITY\n");
1771 }
1772#endif
1773 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1774#ifdef AHC_REPORT_UNDERFLOWS
1775 /*
1776 * This code is disabled by default as some
1777 * clients of the SCSI system do not properly
1778 * initialize the underflow parameter. This
1779 * results in spurious termination of commands
1780 * that complete as expected (e.g. underflow is
1781 * allowed as command can return variable amounts
1782 * of data.
1783 */
1784 } else if (amount_xferred < scb->io_ctx->underflow) {
1785 u_int i;
1786
1787 ahc_print_path(ahc, scb);
1788 printk("CDB:");
1789 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1790 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1791 printk("\n");
1792 ahc_print_path(ahc, scb);
1793 printk("Saw underflow (%ld of %ld bytes). "
1794 "Treated as error\n",
1795 ahc_get_residual(scb),
1796 ahc_get_transfer_length(scb));
1797 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1798#endif
1799 } else {
1800 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1801 }
1802 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1803 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1804 }
1805
1806 if (dev->openings == 1
1807 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1808 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1809 dev->tag_success_count++;
1810 /*
1811 * Some devices deal with temporary internal resource
1812 * shortages by returning queue full. When the queue
1813 * full occurrs, we throttle back. Slowly try to get
1814 * back to our previous queue depth.
1815 */
1816 if ((dev->openings + dev->active) < dev->maxtags
1817 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1818 dev->tag_success_count = 0;
1819 dev->openings++;
1820 }
1821
1822 if (dev->active == 0)
1823 dev->commands_since_idle_or_otag = 0;
1824
1825 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1826 printk("Recovery SCB completes\n");
1827 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1828 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1829 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1830
1831 if (ahc->platform_data->eh_done)
1832 complete(ahc->platform_data->eh_done);
1833 }
1834
1835 ahc_free_scb(ahc, scb);
1836 ahc_linux_queue_cmd_complete(ahc, cmd);
1837}
1838
1839static void
1840ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
1841 struct scsi_device *sdev, struct scb *scb)
1842{
1843 struct ahc_devinfo devinfo;
1844 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1845
1846 ahc_compile_devinfo(&devinfo,
1847 ahc->our_id,
1848 sdev->sdev_target->id, sdev->lun,
1849 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1850 ROLE_INITIATOR);
1851
1852 /*
1853 * We don't currently trust the mid-layer to
1854 * properly deal with queue full or busy. So,
1855 * when one occurs, we tell the mid-layer to
1856 * unconditionally requeue the command to us
1857 * so that we can retry it ourselves. We also
1858 * implement our own throttling mechanism so
1859 * we don't clobber the device with too many
1860 * commands.
1861 */
1862 switch (ahc_get_scsi_status(scb)) {
1863 default:
1864 break;
1865 case SCSI_STATUS_CHECK_COND:
1866 case SCSI_STATUS_CMD_TERMINATED:
1867 {
1868 struct scsi_cmnd *cmd;
1869
1870 /*
1871 * Copy sense information to the OS's cmd
1872 * structure if it is available.
1873 */
1874 cmd = scb->io_ctx;
1875 if (scb->flags & SCB_SENSE) {
1876 u_int sense_size;
1877
1878 sense_size = min(sizeof(struct scsi_sense_data)
1879 - ahc_get_sense_residual(scb),
1880 (u_long)SCSI_SENSE_BUFFERSIZE);
1881 memcpy(cmd->sense_buffer,
1882 ahc_get_sense_buf(ahc, scb), sense_size);
1883 if (sense_size < SCSI_SENSE_BUFFERSIZE)
1884 memset(&cmd->sense_buffer[sense_size], 0,
1885 SCSI_SENSE_BUFFERSIZE - sense_size);
1886 cmd->result |= (DRIVER_SENSE << 24);
1887#ifdef AHC_DEBUG
1888 if (ahc_debug & AHC_SHOW_SENSE) {
1889 int i;
1890
1891 printk("Copied %d bytes of sense data:",
1892 sense_size);
1893 for (i = 0; i < sense_size; i++) {
1894 if ((i & 0xF) == 0)
1895 printk("\n");
1896 printk("0x%x ", cmd->sense_buffer[i]);
1897 }
1898 printk("\n");
1899 }
1900#endif
1901 }
1902 break;
1903 }
1904 case SCSI_STATUS_QUEUE_FULL:
1905 {
1906 /*
1907 * By the time the core driver has returned this
1908 * command, all other commands that were queued
1909 * to us but not the device have been returned.
1910 * This ensures that dev->active is equal to
1911 * the number of commands actually queued to
1912 * the device.
1913 */
1914 dev->tag_success_count = 0;
1915 if (dev->active != 0) {
1916 /*
1917 * Drop our opening count to the number
1918 * of commands currently outstanding.
1919 */
1920 dev->openings = 0;
1921/*
1922 ahc_print_path(ahc, scb);
1923 printk("Dropping tag count to %d\n", dev->active);
1924 */
1925 if (dev->active == dev->tags_on_last_queuefull) {
1926
1927 dev->last_queuefull_same_count++;
1928 /*
1929 * If we repeatedly see a queue full
1930 * at the same queue depth, this
1931 * device has a fixed number of tag
1932 * slots. Lock in this tag depth
1933 * so we stop seeing queue fulls from
1934 * this device.
1935 */
1936 if (dev->last_queuefull_same_count
1937 == AHC_LOCK_TAGS_COUNT) {
1938 dev->maxtags = dev->active;
1939 ahc_print_path(ahc, scb);
1940 printk("Locking max tag count at %d\n",
1941 dev->active);
1942 }
1943 } else {
1944 dev->tags_on_last_queuefull = dev->active;
1945 dev->last_queuefull_same_count = 0;
1946 }
1947 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1948 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
1949 ahc_platform_set_tags(ahc, sdev, &devinfo,
1950 (dev->flags & AHC_DEV_Q_BASIC)
1951 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1952 break;
1953 }
1954 /*
1955 * Drop down to a single opening, and treat this
1956 * as if the target returned BUSY SCSI status.
1957 */
1958 dev->openings = 1;
1959 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
1960 ahc_platform_set_tags(ahc, sdev, &devinfo,
1961 (dev->flags & AHC_DEV_Q_BASIC)
1962 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1963 break;
1964 }
1965 }
1966}
1967
1968static void
1969ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1970{
1971 /*
1972 * Map CAM error codes into Linux Error codes. We
1973 * avoid the conversion so that the DV code has the
1974 * full error information available when making
1975 * state change decisions.
1976 */
1977 {
1978 u_int new_status;
1979
1980 switch (ahc_cmd_get_transaction_status(cmd)) {
1981 case CAM_REQ_INPROG:
1982 case CAM_REQ_CMP:
1983 case CAM_SCSI_STATUS_ERROR:
1984 new_status = DID_OK;
1985 break;
1986 case CAM_REQ_ABORTED:
1987 new_status = DID_ABORT;
1988 break;
1989 case CAM_BUSY:
1990 new_status = DID_BUS_BUSY;
1991 break;
1992 case CAM_REQ_INVALID:
1993 case CAM_PATH_INVALID:
1994 new_status = DID_BAD_TARGET;
1995 break;
1996 case CAM_SEL_TIMEOUT:
1997 new_status = DID_NO_CONNECT;
1998 break;
1999 case CAM_SCSI_BUS_RESET:
2000 case CAM_BDR_SENT:
2001 new_status = DID_RESET;
2002 break;
2003 case CAM_UNCOR_PARITY:
2004 new_status = DID_PARITY;
2005 break;
2006 case CAM_CMD_TIMEOUT:
2007 new_status = DID_TIME_OUT;
2008 break;
2009 case CAM_UA_ABORT:
2010 case CAM_REQ_CMP_ERR:
2011 case CAM_AUTOSENSE_FAIL:
2012 case CAM_NO_HBA:
2013 case CAM_DATA_RUN_ERR:
2014 case CAM_UNEXP_BUSFREE:
2015 case CAM_SEQUENCE_FAIL:
2016 case CAM_CCB_LEN_ERR:
2017 case CAM_PROVIDE_FAIL:
2018 case CAM_REQ_TERMIO:
2019 case CAM_UNREC_HBA_ERROR:
2020 case CAM_REQ_TOO_BIG:
2021 new_status = DID_ERROR;
2022 break;
2023 case CAM_REQUEUE_REQ:
2024 new_status = DID_REQUEUE;
2025 break;
2026 default:
2027 /* We should never get here */
2028 new_status = DID_ERROR;
2029 break;
2030 }
2031
2032 ahc_cmd_set_transaction_status(cmd, new_status);
2033 }
2034
2035 cmd->scsi_done(cmd);
2036}
2037
2038static void
2039ahc_linux_freeze_simq(struct ahc_softc *ahc)
2040{
2041 unsigned long s;
2042
2043 ahc_lock(ahc, &s);
2044 ahc->platform_data->qfrozen++;
2045 if (ahc->platform_data->qfrozen == 1) {
2046 scsi_block_requests(ahc->platform_data->host);
2047
2048 /* XXX What about Twin channels? */
2049 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2050 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2051 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2052 }
2053 ahc_unlock(ahc, &s);
2054}
2055
2056static void
2057ahc_linux_release_simq(struct ahc_softc *ahc)
2058{
2059 u_long s;
2060 int unblock_reqs;
2061
2062 unblock_reqs = 0;
2063 ahc_lock(ahc, &s);
2064 if (ahc->platform_data->qfrozen > 0)
2065 ahc->platform_data->qfrozen--;
2066 if (ahc->platform_data->qfrozen == 0)
2067 unblock_reqs = 1;
2068 ahc_unlock(ahc, &s);
2069 /*
2070 * There is still a race here. The mid-layer
2071 * should keep its own freeze count and use
2072 * a bottom half handler to run the queues
2073 * so we can unblock with our own lock held.
2074 */
2075 if (unblock_reqs)
2076 scsi_unblock_requests(ahc->platform_data->host);
2077}
2078
2079static int
2080ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2081{
2082 struct ahc_softc *ahc;
2083 struct ahc_linux_device *dev;
2084 struct scb *pending_scb;
2085 u_int saved_scbptr;
2086 u_int active_scb_index;
2087 u_int last_phase;
2088 u_int saved_scsiid;
2089 u_int cdb_byte;
2090 int retval;
2091 int was_paused;
2092 int paused;
2093 int wait;
2094 int disconnected;
2095 unsigned long flags;
2096
2097 pending_scb = NULL;
2098 paused = FALSE;
2099 wait = FALSE;
2100 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2101
2102 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
2103 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2104
2105 printk("CDB:");
2106 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2107 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2108 printk("\n");
2109
2110 ahc_lock(ahc, &flags);
2111
2112 /*
2113 * First determine if we currently own this command.
2114 * Start by searching the device queue. If not found
2115 * there, check the pending_scb list. If not found
2116 * at all, and the system wanted us to just abort the
2117 * command, return success.
2118 */
2119 dev = scsi_transport_device_data(cmd->device);
2120
2121 if (dev == NULL) {
2122 /*
2123 * No target device for this command exists,
2124 * so we must not still own the command.
2125 */
2126 printk("%s:%d:%d:%d: Is not an active device\n",
2127 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2128 cmd->device->lun);
2129 retval = SUCCESS;
2130 goto no_cmd;
2131 }
2132
2133 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2134 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2135 cmd->device->channel + 'A',
2136 cmd->device->lun,
2137 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2138 printk("%s:%d:%d:%d: Command found on untagged queue\n",
2139 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2140 cmd->device->lun);
2141 retval = SUCCESS;
2142 goto done;
2143 }
2144
2145 /*
2146 * See if we can find a matching cmd in the pending list.
2147 */
2148 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2149 if (pending_scb->io_ctx == cmd)
2150 break;
2151 }
2152
2153 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2154
2155 /* Any SCB for this device will do for a target reset */
2156 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2157 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2158 scmd_channel(cmd) + 'A',
2159 CAM_LUN_WILDCARD,
2160 SCB_LIST_NULL, ROLE_INITIATOR))
2161 break;
2162 }
2163 }
2164
2165 if (pending_scb == NULL) {
2166 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2167 goto no_cmd;
2168 }
2169
2170 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2171 /*
2172 * We can't queue two recovery actions using the same SCB
2173 */
2174 retval = FAILED;
2175 goto done;
2176 }
2177
2178 /*
2179 * Ensure that the card doesn't do anything
2180 * behind our back and that we didn't "just" miss
2181 * an interrupt that would affect this cmd.
2182 */
2183 was_paused = ahc_is_paused(ahc);
2184 ahc_pause_and_flushwork(ahc);
2185 paused = TRUE;
2186
2187 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2188 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2189 goto no_cmd;
2190 }
2191
2192 printk("%s: At time of recovery, card was %spaused\n",
2193 ahc_name(ahc), was_paused ? "" : "not ");
2194 ahc_dump_card_state(ahc);
2195
2196 disconnected = TRUE;
2197 if (flag == SCB_ABORT) {
2198 if (ahc_search_qinfifo(ahc, cmd->device->id,
2199 cmd->device->channel + 'A',
2200 cmd->device->lun,
2201 pending_scb->hscb->tag,
2202 ROLE_INITIATOR, CAM_REQ_ABORTED,
2203 SEARCH_COMPLETE) > 0) {
2204 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2205 ahc_name(ahc), cmd->device->channel,
2206 cmd->device->id, cmd->device->lun);
2207 retval = SUCCESS;
2208 goto done;
2209 }
2210 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2211 cmd->device->channel + 'A',
2212 cmd->device->lun, pending_scb->hscb->tag,
2213 ROLE_INITIATOR, /*status*/0,
2214 SEARCH_COUNT) > 0) {
2215 disconnected = FALSE;
2216 }
2217
2218 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2219 struct scb *bus_scb;
2220
2221 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2222 if (bus_scb == pending_scb)
2223 disconnected = FALSE;
2224 else if (flag != SCB_ABORT
2225 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2226 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2227 disconnected = FALSE;
2228 }
2229
2230 /*
2231 * At this point, pending_scb is the scb associated with the
2232 * passed in command. That command is currently active on the
2233 * bus, is in the disconnected state, or we're hoping to find
2234 * a command for the same target active on the bus to abuse to
2235 * send a BDR. Queue the appropriate message based on which of
2236 * these states we are in.
2237 */
2238 last_phase = ahc_inb(ahc, LASTPHASE);
2239 saved_scbptr = ahc_inb(ahc, SCBPTR);
2240 active_scb_index = ahc_inb(ahc, SCB_TAG);
2241 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2242 if (last_phase != P_BUSFREE
2243 && (pending_scb->hscb->tag == active_scb_index
2244 || (flag == SCB_DEVICE_RESET
2245 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
2246
2247 /*
2248 * We're active on the bus, so assert ATN
2249 * and hope that the target responds.
2250 */
2251 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2252 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2253 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2254 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2255 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2256 wait = TRUE;
2257 } else if (disconnected) {
2258
2259 /*
2260 * Actually re-queue this SCB in an attempt
2261 * to select the device before it reconnects.
2262 * In either case (selection or reselection),
2263 * we will now issue the approprate message
2264 * to the timed-out device.
2265 *
2266 * Set the MK_MESSAGE control bit indicating
2267 * that we desire to send a message. We
2268 * also set the disconnected flag since
2269 * in the paging case there is no guarantee
2270 * that our SCB control byte matches the
2271 * version on the card. We don't want the
2272 * sequencer to abort the command thinking
2273 * an unsolicited reselection occurred.
2274 */
2275 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2276 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2277
2278 /*
2279 * Remove any cached copy of this SCB in the
2280 * disconnected list in preparation for the
2281 * queuing of our abort SCB. We use the
2282 * same element in the SCB, SCB_NEXT, for
2283 * both the qinfifo and the disconnected list.
2284 */
2285 ahc_search_disc_list(ahc, cmd->device->id,
2286 cmd->device->channel + 'A',
2287 cmd->device->lun, pending_scb->hscb->tag,
2288 /*stop_on_first*/TRUE,
2289 /*remove*/TRUE,
2290 /*save_state*/FALSE);
2291
2292 /*
2293 * In the non-paging case, the sequencer will
2294 * never re-reference the in-core SCB.
2295 * To make sure we are notified during
2296 * reselection, set the MK_MESSAGE flag in
2297 * the card's copy of the SCB.
2298 */
2299 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2300 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2301 ahc_outb(ahc, SCB_CONTROL,
2302 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2303 }
2304
2305 /*
2306 * Clear out any entries in the QINFIFO first
2307 * so we are the next SCB for this target
2308 * to run.
2309 */
2310 ahc_search_qinfifo(ahc, cmd->device->id,
2311 cmd->device->channel + 'A',
2312 cmd->device->lun, SCB_LIST_NULL,
2313 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2314 SEARCH_COMPLETE);
2315 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2316 ahc_outb(ahc, SCBPTR, saved_scbptr);
2317 ahc_print_path(ahc, pending_scb);
2318 printk("Device is disconnected, re-queuing SCB\n");
2319 wait = TRUE;
2320 } else {
2321 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2322 retval = FAILED;
2323 goto done;
2324 }
2325
2326no_cmd:
2327 /*
2328 * Our assumption is that if we don't have the command, no
2329 * recovery action was required, so we return success. Again,
2330 * the semantics of the mid-layer recovery engine are not
2331 * well defined, so this may change in time.
2332 */
2333 retval = SUCCESS;
2334done:
2335 if (paused)
2336 ahc_unpause(ahc);
2337 if (wait) {
2338 DECLARE_COMPLETION_ONSTACK(done);
2339
2340 ahc->platform_data->eh_done = &done;
2341 ahc_unlock(ahc, &flags);
2342
2343 printk("Recovery code sleeping\n");
2344 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2345 ahc_lock(ahc, &flags);
2346 ahc->platform_data->eh_done = NULL;
2347 ahc_unlock(ahc, &flags);
2348
2349 printk("Timer Expired\n");
2350 retval = FAILED;
2351 }
2352 printk("Recovery code awake\n");
2353 } else
2354 ahc_unlock(ahc, &flags);
2355 return (retval);
2356}
2357
2358void
2359ahc_platform_dump_card_state(struct ahc_softc *ahc)
2360{
2361}
2362
2363static void ahc_linux_set_width(struct scsi_target *starget, int width)
2364{
2365 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2366 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2367 struct ahc_devinfo devinfo;
2368 unsigned long flags;
2369
2370 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2371 starget->channel + 'A', ROLE_INITIATOR);
2372 ahc_lock(ahc, &flags);
2373 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2374 ahc_unlock(ahc, &flags);
2375}
2376
2377static void ahc_linux_set_period(struct scsi_target *starget, int period)
2378{
2379 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2380 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2381 struct ahc_tmode_tstate *tstate;
2382 struct ahc_initiator_tinfo *tinfo
2383 = ahc_fetch_transinfo(ahc,
2384 starget->channel + 'A',
2385 shost->this_id, starget->id, &tstate);
2386 struct ahc_devinfo devinfo;
2387 unsigned int ppr_options = tinfo->goal.ppr_options;
2388 unsigned long flags;
2389 unsigned long offset = tinfo->goal.offset;
2390 const struct ahc_syncrate *syncrate;
2391
2392 if (offset == 0)
2393 offset = MAX_OFFSET;
2394
2395 if (period < 9)
2396 period = 9; /* 12.5ns is our minimum */
2397 if (period == 9) {
2398 if (spi_max_width(starget))
2399 ppr_options |= MSG_EXT_PPR_DT_REQ;
2400 else
2401 /* need wide for DT and need DT for 12.5 ns */
2402 period = 10;
2403 }
2404
2405 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2406 starget->channel + 'A', ROLE_INITIATOR);
2407
2408 /* all PPR requests apart from QAS require wide transfers */
2409 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2410 if (spi_width(starget) == 0)
2411 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2412 }
2413
2414 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2415 ahc_lock(ahc, &flags);
2416 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2417 ppr_options, AHC_TRANS_GOAL, FALSE);
2418 ahc_unlock(ahc, &flags);
2419}
2420
2421static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2422{
2423 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2424 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2425 struct ahc_tmode_tstate *tstate;
2426 struct ahc_initiator_tinfo *tinfo
2427 = ahc_fetch_transinfo(ahc,
2428 starget->channel + 'A',
2429 shost->this_id, starget->id, &tstate);
2430 struct ahc_devinfo devinfo;
2431 unsigned int ppr_options = 0;
2432 unsigned int period = 0;
2433 unsigned long flags;
2434 const struct ahc_syncrate *syncrate = NULL;
2435
2436 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2437 starget->channel + 'A', ROLE_INITIATOR);
2438 if (offset != 0) {
2439 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2440 period = tinfo->goal.period;
2441 ppr_options = tinfo->goal.ppr_options;
2442 }
2443 ahc_lock(ahc, &flags);
2444 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2445 ppr_options, AHC_TRANS_GOAL, FALSE);
2446 ahc_unlock(ahc, &flags);
2447}
2448
2449static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2450{
2451 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2452 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2453 struct ahc_tmode_tstate *tstate;
2454 struct ahc_initiator_tinfo *tinfo
2455 = ahc_fetch_transinfo(ahc,
2456 starget->channel + 'A',
2457 shost->this_id, starget->id, &tstate);
2458 struct ahc_devinfo devinfo;
2459 unsigned int ppr_options = tinfo->goal.ppr_options
2460 & ~MSG_EXT_PPR_DT_REQ;
2461 unsigned int period = tinfo->goal.period;
2462 unsigned int width = tinfo->goal.width;
2463 unsigned long flags;
2464 const struct ahc_syncrate *syncrate;
2465
2466 if (dt && spi_max_width(starget)) {
2467 ppr_options |= MSG_EXT_PPR_DT_REQ;
2468 if (!width)
2469 ahc_linux_set_width(starget, 1);
2470 } else if (period == 9)
2471 period = 10; /* if resetting DT, period must be >= 25ns */
2472
2473 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2474 starget->channel + 'A', ROLE_INITIATOR);
2475 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
2476 ahc_lock(ahc, &flags);
2477 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2478 ppr_options, AHC_TRANS_GOAL, FALSE);
2479 ahc_unlock(ahc, &flags);
2480}
2481
2482#if 0
2483/* FIXME: This code claims to support IU and QAS. However, the actual
2484 * sequencer code and aic7xxx_core have no support for these parameters and
2485 * will get into a bad state if they're negotiated. Do not enable this
2486 * unless you know what you're doing */
2487static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2488{
2489 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2490 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2491 struct ahc_tmode_tstate *tstate;
2492 struct ahc_initiator_tinfo *tinfo
2493 = ahc_fetch_transinfo(ahc,
2494 starget->channel + 'A',
2495 shost->this_id, starget->id, &tstate);
2496 struct ahc_devinfo devinfo;
2497 unsigned int ppr_options = tinfo->goal.ppr_options
2498 & ~MSG_EXT_PPR_QAS_REQ;
2499 unsigned int period = tinfo->goal.period;
2500 unsigned long flags;
2501 struct ahc_syncrate *syncrate;
2502
2503 if (qas)
2504 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2505
2506 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2507 starget->channel + 'A', ROLE_INITIATOR);
2508 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2509 ahc_lock(ahc, &flags);
2510 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2511 ppr_options, AHC_TRANS_GOAL, FALSE);
2512 ahc_unlock(ahc, &flags);
2513}
2514
2515static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2516{
2517 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2518 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2519 struct ahc_tmode_tstate *tstate;
2520 struct ahc_initiator_tinfo *tinfo
2521 = ahc_fetch_transinfo(ahc,
2522 starget->channel + 'A',
2523 shost->this_id, starget->id, &tstate);
2524 struct ahc_devinfo devinfo;
2525 unsigned int ppr_options = tinfo->goal.ppr_options
2526 & ~MSG_EXT_PPR_IU_REQ;
2527 unsigned int period = tinfo->goal.period;
2528 unsigned long flags;
2529 struct ahc_syncrate *syncrate;
2530
2531 if (iu)
2532 ppr_options |= MSG_EXT_PPR_IU_REQ;
2533
2534 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2535 starget->channel + 'A', ROLE_INITIATOR);
2536 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2537 ahc_lock(ahc, &flags);
2538 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2539 ppr_options, AHC_TRANS_GOAL, FALSE);
2540 ahc_unlock(ahc, &flags);
2541}
2542#endif
2543
2544static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2545{
2546 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
2547 unsigned long flags;
2548 u8 mode;
2549
2550 if (!(ahc->features & AHC_ULTRA2)) {
2551 /* non-LVD chipset, may not have SBLKCTL reg */
2552 spi_signalling(shost) =
2553 ahc->features & AHC_HVD ?
2554 SPI_SIGNAL_HVD :
2555 SPI_SIGNAL_SE;
2556 return;
2557 }
2558
2559 ahc_lock(ahc, &flags);
2560 ahc_pause(ahc);
2561 mode = ahc_inb(ahc, SBLKCTL);
2562 ahc_unpause(ahc);
2563 ahc_unlock(ahc, &flags);
2564
2565 if (mode & ENAB40)
2566 spi_signalling(shost) = SPI_SIGNAL_LVD;
2567 else if (mode & ENAB20)
2568 spi_signalling(shost) = SPI_SIGNAL_SE;
2569 else
2570 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2571}
2572
2573static struct spi_function_template ahc_linux_transport_functions = {
2574 .set_offset = ahc_linux_set_offset,
2575 .show_offset = 1,
2576 .set_period = ahc_linux_set_period,
2577 .show_period = 1,
2578 .set_width = ahc_linux_set_width,
2579 .show_width = 1,
2580 .set_dt = ahc_linux_set_dt,
2581 .show_dt = 1,
2582#if 0
2583 .set_iu = ahc_linux_set_iu,
2584 .show_iu = 1,
2585 .set_qas = ahc_linux_set_qas,
2586 .show_qas = 1,
2587#endif
2588 .get_signalling = ahc_linux_get_signalling,
2589};
2590
2591
2592
2593static int __init
2594ahc_linux_init(void)
2595{
2596 /*
2597 * If we've been passed any parameters, process them now.
2598 */
2599 if (aic7xxx)
2600 aic7xxx_setup(aic7xxx);
2601
2602 ahc_linux_transport_template =
2603 spi_attach_transport(&ahc_linux_transport_functions);
2604 if (!ahc_linux_transport_template)
2605 return -ENODEV;
2606
2607 scsi_transport_reserve_device(ahc_linux_transport_template,
2608 sizeof(struct ahc_linux_device));
2609
2610 ahc_linux_pci_init();
2611 ahc_linux_eisa_init();
2612 return 0;
2613}
2614
2615static void
2616ahc_linux_exit(void)
2617{
2618 ahc_linux_pci_exit();
2619 ahc_linux_eisa_exit();
2620 spi_release_transport(ahc_linux_transport_template);
2621}
2622
2623module_init(ahc_linux_init);
2624module_exit(ahc_linux_exit);
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>
125
126static struct scsi_transport_template *ahc_linux_transport_template = NULL;
127
128#include <linux/init.h> /* __setup */
129#include <linux/mm.h> /* For fetching system memory size */
130#include <linux/blkdev.h> /* For block_size() */
131#include <linux/delay.h> /* For ssleep/msleep */
132#include <linux/slab.h>
133
134
135/*
136 * Set this to the delay in seconds after SCSI bus reset.
137 * Note, we honor this only for the initial bus reset.
138 * The scsi error recovery code performs its own bus settle
139 * delay handling for error recovery actions.
140 */
141#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
142#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
143#else
144#define AIC7XXX_RESET_DELAY 5000
145#endif
146
147/*
148 * To change the default number of tagged transactions allowed per-device,
149 * add a line to the lilo.conf file like:
150 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
151 * which will result in the first four devices on the first two
152 * controllers being set to a tagged queue depth of 32.
153 *
154 * The tag_commands is an array of 16 to allow for wide and twin adapters.
155 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
156 * for channel 1.
157 */
158typedef struct {
159 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
160} adapter_tag_info_t;
161
162/*
163 * Modify this as you see fit for your system.
164 *
165 * 0 tagged queuing disabled
166 * 1 <= n <= 253 n == max tags ever dispatched.
167 *
168 * The driver will throttle the number of commands dispatched to a
169 * device if it returns queue full. For devices with a fixed maximum
170 * queue depth, the driver will eventually determine this depth and
171 * lock it in (a console message is printed to indicate that a lock
172 * has occurred). On some devices, queue full is returned for a temporary
173 * resource shortage. These devices will return queue full at varying
174 * depths. The driver will throttle back when the queue fulls occur and
175 * attempt to slowly increase the depth over time as the device recovers
176 * from the resource shortage.
177 *
178 * In this example, the first line will disable tagged queueing for all
179 * the devices on the first probed aic7xxx adapter.
180 *
181 * The second line enables tagged queueing with 4 commands/LUN for IDs
182 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
183 * driver to attempt to use up to 64 tags for ID 1.
184 *
185 * The third line is the same as the first line.
186 *
187 * The fourth line disables tagged queueing for devices 0 and 3. It
188 * enables tagged queueing for the other IDs, with 16 commands/LUN
189 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
190 * IDs 2, 5-7, and 9-15.
191 */
192
193/*
194 * NOTE: The below structure is for reference only, the actual structure
195 * to modify in order to change things is just below this comment block.
196adapter_tag_info_t aic7xxx_tag_info[] =
197{
198 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
199 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
200 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
201 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
202};
203*/
204
205#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
206#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
207#else
208#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
209#endif
210
211#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
212 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
213 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
214 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
215 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
216 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
217 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
218 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
219 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
220}
221
222/*
223 * By default, use the number of commands specified by
224 * the users kernel configuration.
225 */
226static adapter_tag_info_t aic7xxx_tag_info[] =
227{
228 {AIC7XXX_CONFIGED_TAG_COMMANDS},
229 {AIC7XXX_CONFIGED_TAG_COMMANDS},
230 {AIC7XXX_CONFIGED_TAG_COMMANDS},
231 {AIC7XXX_CONFIGED_TAG_COMMANDS},
232 {AIC7XXX_CONFIGED_TAG_COMMANDS},
233 {AIC7XXX_CONFIGED_TAG_COMMANDS},
234 {AIC7XXX_CONFIGED_TAG_COMMANDS},
235 {AIC7XXX_CONFIGED_TAG_COMMANDS},
236 {AIC7XXX_CONFIGED_TAG_COMMANDS},
237 {AIC7XXX_CONFIGED_TAG_COMMANDS},
238 {AIC7XXX_CONFIGED_TAG_COMMANDS},
239 {AIC7XXX_CONFIGED_TAG_COMMANDS},
240 {AIC7XXX_CONFIGED_TAG_COMMANDS},
241 {AIC7XXX_CONFIGED_TAG_COMMANDS},
242 {AIC7XXX_CONFIGED_TAG_COMMANDS},
243 {AIC7XXX_CONFIGED_TAG_COMMANDS}
244};
245
246/*
247 * There should be a specific return value for this in scsi.h, but
248 * it seems that most drivers ignore it.
249 */
250#define DID_UNDERFLOW DID_ERROR
251
252void
253ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
254{
255 printk("(scsi%d:%c:%d:%d): ",
256 ahc->platform_data->host->host_no,
257 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
258 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
259 scb != NULL ? SCB_GET_LUN(scb) : -1);
260}
261
262/*
263 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
264 * cards in the system. This should be fixed. Exceptions to this
265 * rule are noted in the comments.
266 */
267
268/*
269 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
270 * has no effect on any later resets that might occur due to things like
271 * SCSI bus timeouts.
272 */
273static uint32_t aic7xxx_no_reset;
274
275/*
276 * Should we force EXTENDED translation on a controller.
277 * 0 == Use whatever is in the SEEPROM or default to off
278 * 1 == Use whatever is in the SEEPROM or default to on
279 */
280static uint32_t aic7xxx_extended;
281
282/*
283 * PCI bus parity checking of the Adaptec controllers. This is somewhat
284 * dubious at best. To my knowledge, this option has never actually
285 * solved a PCI parity problem, but on certain machines with broken PCI
286 * chipset configurations where stray PCI transactions with bad parity are
287 * the norm rather than the exception, the error messages can be overwhelming.
288 * It's included in the driver for completeness.
289 * 0 = Shut off PCI parity check
290 * non-0 = reverse polarity pci parity checking
291 */
292static uint32_t aic7xxx_pci_parity = ~0;
293
294/*
295 * There are lots of broken chipsets in the world. Some of them will
296 * violate the PCI spec when we issue byte sized memory writes to our
297 * controller. I/O mapped register access, if allowed by the given
298 * platform, will work in almost all cases.
299 */
300uint32_t aic7xxx_allow_memio = ~0;
301
302/*
303 * So that we can set how long each device is given as a selection timeout.
304 * The table of values goes like this:
305 * 0 - 256ms
306 * 1 - 128ms
307 * 2 - 64ms
308 * 3 - 32ms
309 * We default to 256ms because some older devices need a longer time
310 * to respond to initial selection.
311 */
312static uint32_t aic7xxx_seltime;
313
314/*
315 * Certain devices do not perform any aging on commands. Should the
316 * device be saturated by commands in one portion of the disk, it is
317 * possible for transactions on far away sectors to never be serviced.
318 * To handle these devices, we can periodically send an ordered tag to
319 * force all outstanding transactions to be serviced prior to a new
320 * transaction.
321 */
322static uint32_t aic7xxx_periodic_otag;
323
324/*
325 * Module information and settable options.
326 */
327static char *aic7xxx = NULL;
328
329MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
330MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");
331MODULE_LICENSE("Dual BSD/GPL");
332MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
333module_param(aic7xxx, charp, 0444);
334MODULE_PARM_DESC(aic7xxx,
335"period-delimited options string:\n"
336" verbose Enable verbose/diagnostic logging\n"
337" allow_memio Allow device registers to be memory mapped\n"
338" debug Bitmask of debug values to enable\n"
339" no_probe Toggle EISA/VLB controller probing\n"
340" probe_eisa_vl Toggle EISA/VLB controller probing\n"
341" no_reset Suppress initial bus resets\n"
342" extended Enable extended geometry on all controllers\n"
343" periodic_otag Send an ordered tagged transaction\n"
344" periodically to prevent tag starvation.\n"
345" This may be required by some older disk\n"
346" drives or RAID arrays.\n"
347" tag_info:<tag_str> Set per-target tag depth\n"
348" global_tag_depth:<int> Global tag depth for every target\n"
349" on every bus\n"
350" seltime:<int> Selection Timeout\n"
351" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
352"\n"
353" Sample modprobe configuration file:\n"
354" # Toggle EISA/VLB probing\n"
355" # Set tag depth on Controller 1/Target 1 to 10 tags\n"
356" # Shorten the selection timeout to 128ms\n"
357"\n"
358" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
359);
360
361static void ahc_linux_handle_scsi_status(struct ahc_softc *,
362 struct scsi_device *,
363 struct scb *);
364static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
365 struct scsi_cmnd *cmd);
366static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
367static void ahc_linux_release_simq(struct ahc_softc *ahc);
368static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
369static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
370static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
371 struct ahc_devinfo *devinfo);
372static void ahc_linux_device_queue_depth(struct scsi_device *);
373static int ahc_linux_run_command(struct ahc_softc*,
374 struct ahc_linux_device *,
375 struct scsi_cmnd *);
376static void ahc_linux_setup_tag_info_global(char *p);
377static int aic7xxx_setup(char *s);
378
379static int ahc_linux_unit;
380
381
382/************************** OS Utility Wrappers *******************************/
383void
384ahc_delay(long usec)
385{
386 /*
387 * udelay on Linux can have problems for
388 * multi-millisecond waits. Wait at most
389 * 1024us per call.
390 */
391 while (usec > 0) {
392 udelay(usec % 1024);
393 usec -= 1024;
394 }
395}
396
397/***************************** Low Level I/O **********************************/
398uint8_t
399ahc_inb(struct ahc_softc * ahc, long port)
400{
401 uint8_t x;
402
403 if (ahc->tag == BUS_SPACE_MEMIO) {
404 x = readb(ahc->bsh.maddr + port);
405 } else {
406 x = inb(ahc->bsh.ioport + port);
407 }
408 mb();
409 return (x);
410}
411
412void
413ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
414{
415 if (ahc->tag == BUS_SPACE_MEMIO) {
416 writeb(val, ahc->bsh.maddr + port);
417 } else {
418 outb(val, ahc->bsh.ioport + port);
419 }
420 mb();
421}
422
423void
424ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
425{
426 int i;
427
428 /*
429 * There is probably a more efficient way to do this on Linux
430 * but we don't use this for anything speed critical and this
431 * should work.
432 */
433 for (i = 0; i < count; i++)
434 ahc_outb(ahc, port, *array++);
435}
436
437void
438ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
439{
440 int i;
441
442 /*
443 * There is probably a more efficient way to do this on Linux
444 * but we don't use this for anything speed critical and this
445 * should work.
446 */
447 for (i = 0; i < count; i++)
448 *array++ = ahc_inb(ahc, port);
449}
450
451/********************************* Inlines ************************************/
452static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
453
454static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
455 struct ahc_dma_seg *sg,
456 dma_addr_t addr, bus_size_t len);
457
458static void
459ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
460{
461 struct scsi_cmnd *cmd;
462
463 cmd = scb->io_ctx;
464 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
465
466 scsi_dma_unmap(cmd);
467}
468
469static int
470ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
471 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
472{
473 int consumed;
474
475 if ((scb->sg_count + 1) > AHC_NSEG)
476 panic("Too few segs for dma mapping. "
477 "Increase AHC_NSEG\n");
478
479 consumed = 1;
480 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
481 scb->platform_data->xfer_len += len;
482
483 if (sizeof(dma_addr_t) > 4
484 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
485 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
486
487 sg->len = ahc_htole32(len);
488 return (consumed);
489}
490
491/*
492 * Return a string describing the driver.
493 */
494static const char *
495ahc_linux_info(struct Scsi_Host *host)
496{
497 static char buffer[512];
498 char ahc_info[256];
499 char *bp;
500 struct ahc_softc *ahc;
501
502 bp = &buffer[0];
503 ahc = *(struct ahc_softc **)host->hostdata;
504 memset(bp, 0, sizeof(buffer));
505 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n"
506 " <");
507 strcat(bp, ahc->description);
508 strcat(bp, ">\n"
509 " ");
510 ahc_controller_info(ahc, ahc_info);
511 strcat(bp, ahc_info);
512 strcat(bp, "\n");
513
514 return (bp);
515}
516
517/*
518 * Queue an SCB to the controller.
519 */
520static int
521ahc_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
522{
523 struct ahc_softc *ahc;
524 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
525 int rtn = SCSI_MLQUEUE_HOST_BUSY;
526 unsigned long flags;
527
528 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
529
530 ahc_lock(ahc, &flags);
531 if (ahc->platform_data->qfrozen == 0) {
532 cmd->scsi_done = scsi_done;
533 cmd->result = CAM_REQ_INPROG << 16;
534 rtn = ahc_linux_run_command(ahc, dev, cmd);
535 }
536 ahc_unlock(ahc, &flags);
537
538 return rtn;
539}
540
541static DEF_SCSI_QCMD(ahc_linux_queue)
542
543static inline struct scsi_target **
544ahc_linux_target_in_softc(struct scsi_target *starget)
545{
546 struct ahc_softc *ahc =
547 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
548 unsigned int target_offset;
549
550 target_offset = starget->id;
551 if (starget->channel != 0)
552 target_offset += 8;
553
554 return &ahc->platform_data->starget[target_offset];
555}
556
557static int
558ahc_linux_target_alloc(struct scsi_target *starget)
559{
560 struct ahc_softc *ahc =
561 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
562 struct seeprom_config *sc = ahc->seep_config;
563 unsigned long flags;
564 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
565 unsigned short scsirate;
566 struct ahc_devinfo devinfo;
567 struct ahc_initiator_tinfo *tinfo;
568 struct ahc_tmode_tstate *tstate;
569 char channel = starget->channel + 'A';
570 unsigned int our_id = ahc->our_id;
571 unsigned int target_offset;
572
573 target_offset = starget->id;
574 if (starget->channel != 0)
575 target_offset += 8;
576
577 if (starget->channel)
578 our_id = ahc->our_id_b;
579
580 ahc_lock(ahc, &flags);
581
582 BUG_ON(*ahc_targp != NULL);
583
584 *ahc_targp = starget;
585
586 if (sc) {
587 int maxsync = AHC_SYNCRATE_DT;
588 int ultra = 0;
589 int flags = sc->device_flags[target_offset];
590
591 if (ahc->flags & AHC_NEWEEPROM_FMT) {
592 if (flags & CFSYNCHISULTRA)
593 ultra = 1;
594 } else if (flags & CFULTRAEN)
595 ultra = 1;
596 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
597 * change it to ultra=0, CFXFER = 0 */
598 if(ultra && (flags & CFXFER) == 0x04) {
599 ultra = 0;
600 flags &= ~CFXFER;
601 }
602
603 if ((ahc->features & AHC_ULTRA2) != 0) {
604 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
605 } else {
606 scsirate = (flags & CFXFER) << 4;
607 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
608 AHC_SYNCRATE_FAST;
609 }
610 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
611 if (!(flags & CFSYNCH))
612 spi_max_offset(starget) = 0;
613 spi_min_period(starget) =
614 ahc_find_period(ahc, scsirate, maxsync);
615
616 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
617 starget->id, &tstate);
618 }
619 ahc_compile_devinfo(&devinfo, our_id, starget->id,
620 CAM_LUN_WILDCARD, channel,
621 ROLE_INITIATOR);
622 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
623 AHC_TRANS_GOAL, /*paused*/FALSE);
624 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
625 AHC_TRANS_GOAL, /*paused*/FALSE);
626 ahc_unlock(ahc, &flags);
627
628 return 0;
629}
630
631static void
632ahc_linux_target_destroy(struct scsi_target *starget)
633{
634 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
635
636 *ahc_targp = NULL;
637}
638
639static int
640ahc_linux_slave_alloc(struct scsi_device *sdev)
641{
642 struct ahc_softc *ahc =
643 *((struct ahc_softc **)sdev->host->hostdata);
644 struct scsi_target *starget = sdev->sdev_target;
645 struct ahc_linux_device *dev;
646
647 if (bootverbose)
648 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
649
650 dev = scsi_transport_device_data(sdev);
651 memset(dev, 0, sizeof(*dev));
652
653 /*
654 * We start out life using untagged
655 * transactions of which we allow one.
656 */
657 dev->openings = 1;
658
659 /*
660 * Set maxtags to 0. This will be changed if we
661 * later determine that we are dealing with
662 * a tagged queuing capable device.
663 */
664 dev->maxtags = 0;
665
666 spi_period(starget) = 0;
667
668 return 0;
669}
670
671static int
672ahc_linux_slave_configure(struct scsi_device *sdev)
673{
674 struct ahc_softc *ahc;
675
676 ahc = *((struct ahc_softc **)sdev->host->hostdata);
677
678 if (bootverbose)
679 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
680
681 ahc_linux_device_queue_depth(sdev);
682
683 /* Initial Domain Validation */
684 if (!spi_initial_dv(sdev->sdev_target))
685 spi_dv_device(sdev);
686
687 return 0;
688}
689
690#if defined(__i386__)
691/*
692 * Return the disk geometry for the given SCSI device.
693 */
694static int
695ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
696 sector_t capacity, int geom[])
697{
698 uint8_t *bh;
699 int heads;
700 int sectors;
701 int cylinders;
702 int ret;
703 int extended;
704 struct ahc_softc *ahc;
705 u_int channel;
706
707 ahc = *((struct ahc_softc **)sdev->host->hostdata);
708 channel = sdev_channel(sdev);
709
710 bh = scsi_bios_ptable(bdev);
711 if (bh) {
712 ret = scsi_partsize(bh, capacity,
713 &geom[2], &geom[0], &geom[1]);
714 kfree(bh);
715 if (ret != -1)
716 return (ret);
717 }
718 heads = 64;
719 sectors = 32;
720 cylinders = aic_sector_div(capacity, heads, sectors);
721
722 if (aic7xxx_extended != 0)
723 extended = 1;
724 else if (channel == 0)
725 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
726 else
727 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
728 if (extended && cylinders >= 1024) {
729 heads = 255;
730 sectors = 63;
731 cylinders = aic_sector_div(capacity, heads, sectors);
732 }
733 geom[0] = heads;
734 geom[1] = sectors;
735 geom[2] = cylinders;
736 return (0);
737}
738#endif
739
740/*
741 * Abort the current SCSI command(s).
742 */
743static int
744ahc_linux_abort(struct scsi_cmnd *cmd)
745{
746 int error;
747
748 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
749 if (error != 0)
750 printk("aic7xxx_abort returns 0x%x\n", error);
751 return (error);
752}
753
754/*
755 * Attempt to send a target reset message to the device that timed out.
756 */
757static int
758ahc_linux_dev_reset(struct scsi_cmnd *cmd)
759{
760 int error;
761
762 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
763 if (error != 0)
764 printk("aic7xxx_dev_reset returns 0x%x\n", error);
765 return (error);
766}
767
768/*
769 * Reset the SCSI bus.
770 */
771static int
772ahc_linux_bus_reset(struct scsi_cmnd *cmd)
773{
774 struct ahc_softc *ahc;
775 int found;
776 unsigned long flags;
777
778 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
779
780 ahc_lock(ahc, &flags);
781 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
782 /*initiate reset*/TRUE);
783 ahc_unlock(ahc, &flags);
784
785 if (bootverbose)
786 printk("%s: SCSI bus reset delivered. "
787 "%d SCBs aborted.\n", ahc_name(ahc), found);
788
789 return SUCCESS;
790}
791
792struct scsi_host_template aic7xxx_driver_template = {
793 .module = THIS_MODULE,
794 .name = "aic7xxx",
795 .proc_name = "aic7xxx",
796 .show_info = ahc_linux_show_info,
797 .write_info = ahc_proc_write_seeprom,
798 .info = ahc_linux_info,
799 .queuecommand = ahc_linux_queue,
800 .eh_abort_handler = ahc_linux_abort,
801 .eh_device_reset_handler = ahc_linux_dev_reset,
802 .eh_bus_reset_handler = ahc_linux_bus_reset,
803#if defined(__i386__)
804 .bios_param = ahc_linux_biosparam,
805#endif
806 .can_queue = AHC_MAX_QUEUE,
807 .this_id = -1,
808 .max_sectors = 8192,
809 .cmd_per_lun = 2,
810 .use_clustering = ENABLE_CLUSTERING,
811 .slave_alloc = ahc_linux_slave_alloc,
812 .slave_configure = ahc_linux_slave_configure,
813 .target_alloc = ahc_linux_target_alloc,
814 .target_destroy = ahc_linux_target_destroy,
815};
816
817/**************************** Tasklet Handler *********************************/
818
819/******************************** Macros **************************************/
820#define BUILD_SCSIID(ahc, cmd) \
821 ((((cmd)->device->id << TID_SHIFT) & TID) \
822 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
823 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
824
825/******************************** Bus DMA *************************************/
826int
827ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
828 bus_size_t alignment, bus_size_t boundary,
829 dma_addr_t lowaddr, dma_addr_t highaddr,
830 bus_dma_filter_t *filter, void *filterarg,
831 bus_size_t maxsize, int nsegments,
832 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
833{
834 bus_dma_tag_t dmat;
835
836 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
837 if (dmat == NULL)
838 return (ENOMEM);
839
840 /*
841 * Linux is very simplistic about DMA memory. For now don't
842 * maintain all specification information. Once Linux supplies
843 * better facilities for doing these operations, or the
844 * needs of this particular driver change, we might need to do
845 * more here.
846 */
847 dmat->alignment = alignment;
848 dmat->boundary = boundary;
849 dmat->maxsize = maxsize;
850 *ret_tag = dmat;
851 return (0);
852}
853
854void
855ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
856{
857 kfree(dmat);
858}
859
860int
861ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
862 int flags, bus_dmamap_t *mapp)
863{
864 *vaddr = pci_alloc_consistent(ahc->dev_softc,
865 dmat->maxsize, mapp);
866 if (*vaddr == NULL)
867 return ENOMEM;
868 return 0;
869}
870
871void
872ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
873 void* vaddr, bus_dmamap_t map)
874{
875 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
876 vaddr, map);
877}
878
879int
880ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
881 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
882 void *cb_arg, int flags)
883{
884 /*
885 * Assume for now that this will only be used during
886 * initialization and not for per-transaction buffer mapping.
887 */
888 bus_dma_segment_t stack_sg;
889
890 stack_sg.ds_addr = map;
891 stack_sg.ds_len = dmat->maxsize;
892 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
893 return (0);
894}
895
896void
897ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
898{
899}
900
901int
902ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
903{
904 /* Nothing to do */
905 return (0);
906}
907
908static void
909ahc_linux_setup_tag_info_global(char *p)
910{
911 int tags, i, j;
912
913 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
914 printk("Setting Global Tags= %d\n", tags);
915
916 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
917 for (j = 0; j < AHC_NUM_TARGETS; j++) {
918 aic7xxx_tag_info[i].tag_commands[j] = tags;
919 }
920 }
921}
922
923static void
924ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
925{
926
927 if ((instance >= 0) && (targ >= 0)
928 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
929 && (targ < AHC_NUM_TARGETS)) {
930 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
931 if (bootverbose)
932 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
933 }
934}
935
936static char *
937ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
938 void (*callback)(u_long, int, int, int32_t),
939 u_long callback_arg)
940{
941 char *tok_end;
942 char *tok_end2;
943 int i;
944 int instance;
945 int targ;
946 int done;
947 char tok_list[] = {'.', ',', '{', '}', '\0'};
948
949 /* All options use a ':' name/arg separator */
950 if (*opt_arg != ':')
951 return (opt_arg);
952 opt_arg++;
953 instance = -1;
954 targ = -1;
955 done = FALSE;
956 /*
957 * Restore separator that may be in
958 * the middle of our option argument.
959 */
960 tok_end = strchr(opt_arg, '\0');
961 if (tok_end < end)
962 *tok_end = ',';
963 while (!done) {
964 switch (*opt_arg) {
965 case '{':
966 if (instance == -1) {
967 instance = 0;
968 } else {
969 if (depth > 1) {
970 if (targ == -1)
971 targ = 0;
972 } else {
973 printk("Malformed Option %s\n",
974 opt_name);
975 done = TRUE;
976 }
977 }
978 opt_arg++;
979 break;
980 case '}':
981 if (targ != -1)
982 targ = -1;
983 else if (instance != -1)
984 instance = -1;
985 opt_arg++;
986 break;
987 case ',':
988 case '.':
989 if (instance == -1)
990 done = TRUE;
991 else if (targ >= 0)
992 targ++;
993 else if (instance >= 0)
994 instance++;
995 opt_arg++;
996 break;
997 case '\0':
998 done = TRUE;
999 break;
1000 default:
1001 tok_end = end;
1002 for (i = 0; tok_list[i]; i++) {
1003 tok_end2 = strchr(opt_arg, tok_list[i]);
1004 if ((tok_end2) && (tok_end2 < tok_end))
1005 tok_end = tok_end2;
1006 }
1007 callback(callback_arg, instance, targ,
1008 simple_strtol(opt_arg, NULL, 0));
1009 opt_arg = tok_end;
1010 break;
1011 }
1012 }
1013 return (opt_arg);
1014}
1015
1016/*
1017 * Handle Linux boot parameters. This routine allows for assigning a value
1018 * to a parameter with a ':' between the parameter and the value.
1019 * ie. aic7xxx=stpwlev:1,extended
1020 */
1021static int
1022aic7xxx_setup(char *s)
1023{
1024 int i, n;
1025 char *p;
1026 char *end;
1027
1028 static const struct {
1029 const char *name;
1030 uint32_t *flag;
1031 } options[] = {
1032 { "extended", &aic7xxx_extended },
1033 { "no_reset", &aic7xxx_no_reset },
1034 { "verbose", &aic7xxx_verbose },
1035 { "allow_memio", &aic7xxx_allow_memio},
1036#ifdef AHC_DEBUG
1037 { "debug", &ahc_debug },
1038#endif
1039 { "periodic_otag", &aic7xxx_periodic_otag },
1040 { "pci_parity", &aic7xxx_pci_parity },
1041 { "seltime", &aic7xxx_seltime },
1042 { "tag_info", NULL },
1043 { "global_tag_depth", NULL },
1044 { "dv", NULL }
1045 };
1046
1047 end = strchr(s, '\0');
1048
1049 /*
1050 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1051 * will never be 0 in this case.
1052 */
1053 n = 0;
1054
1055 while ((p = strsep(&s, ",.")) != NULL) {
1056 if (*p == '\0')
1057 continue;
1058 for (i = 0; i < ARRAY_SIZE(options); i++) {
1059
1060 n = strlen(options[i].name);
1061 if (strncmp(options[i].name, p, n) == 0)
1062 break;
1063 }
1064 if (i == ARRAY_SIZE(options))
1065 continue;
1066
1067 if (strncmp(p, "global_tag_depth", n) == 0) {
1068 ahc_linux_setup_tag_info_global(p + n);
1069 } else if (strncmp(p, "tag_info", n) == 0) {
1070 s = ahc_parse_brace_option("tag_info", p + n, end,
1071 2, ahc_linux_setup_tag_info, 0);
1072 } else if (p[n] == ':') {
1073 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1074 } else if (strncmp(p, "verbose", n) == 0) {
1075 *(options[i].flag) = 1;
1076 } else {
1077 *(options[i].flag) ^= 0xFFFFFFFF;
1078 }
1079 }
1080 return 1;
1081}
1082
1083__setup("aic7xxx=", aic7xxx_setup);
1084
1085uint32_t aic7xxx_verbose;
1086
1087int
1088ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1089{
1090 char buf[80];
1091 struct Scsi_Host *host;
1092 char *new_name;
1093 u_long s;
1094 int retval;
1095
1096 template->name = ahc->description;
1097 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1098 if (host == NULL)
1099 return (ENOMEM);
1100
1101 *((struct ahc_softc **)host->hostdata) = ahc;
1102 ahc->platform_data->host = host;
1103 host->can_queue = AHC_MAX_QUEUE;
1104 host->cmd_per_lun = 2;
1105 /* XXX No way to communicate the ID for multiple channels */
1106 host->this_id = ahc->our_id;
1107 host->irq = ahc->platform_data->irq;
1108 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1109 host->max_lun = AHC_NUM_LUNS;
1110 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1111 host->sg_tablesize = AHC_NSEG;
1112 ahc_lock(ahc, &s);
1113 ahc_set_unit(ahc, ahc_linux_unit++);
1114 ahc_unlock(ahc, &s);
1115 sprintf(buf, "scsi%d", host->host_no);
1116 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1117 if (new_name != NULL) {
1118 strcpy(new_name, buf);
1119 ahc_set_name(ahc, new_name);
1120 }
1121 host->unique_id = ahc->unit;
1122 ahc_linux_initialize_scsi_bus(ahc);
1123 ahc_intr_enable(ahc, TRUE);
1124
1125 host->transportt = ahc_linux_transport_template;
1126
1127 retval = scsi_add_host(host,
1128 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
1129 if (retval) {
1130 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1131 scsi_host_put(host);
1132 return retval;
1133 }
1134
1135 scsi_scan_host(host);
1136 return 0;
1137}
1138
1139/*
1140 * Place the SCSI bus into a known state by either resetting it,
1141 * or forcing transfer negotiations on the next command to any
1142 * target.
1143 */
1144void
1145ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1146{
1147 int i;
1148 int numtarg;
1149 unsigned long s;
1150
1151 i = 0;
1152 numtarg = 0;
1153
1154 ahc_lock(ahc, &s);
1155
1156 if (aic7xxx_no_reset != 0)
1157 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1158
1159 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1160 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1161 else
1162 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1163
1164 if ((ahc->features & AHC_TWIN) != 0) {
1165
1166 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1167 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1168 } else {
1169 if (numtarg == 0)
1170 i = 8;
1171 numtarg += 8;
1172 }
1173 }
1174
1175 /*
1176 * Force negotiation to async for all targets that
1177 * will not see an initial bus reset.
1178 */
1179 for (; i < numtarg; i++) {
1180 struct ahc_devinfo devinfo;
1181 struct ahc_initiator_tinfo *tinfo;
1182 struct ahc_tmode_tstate *tstate;
1183 u_int our_id;
1184 u_int target_id;
1185 char channel;
1186
1187 channel = 'A';
1188 our_id = ahc->our_id;
1189 target_id = i;
1190 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1191 channel = 'B';
1192 our_id = ahc->our_id_b;
1193 target_id = i % 8;
1194 }
1195 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1196 target_id, &tstate);
1197 ahc_compile_devinfo(&devinfo, our_id, target_id,
1198 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1199 ahc_update_neg_request(ahc, &devinfo, tstate,
1200 tinfo, AHC_NEG_ALWAYS);
1201 }
1202 ahc_unlock(ahc, &s);
1203 /* Give the bus some time to recover */
1204 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1205 ahc_linux_freeze_simq(ahc);
1206 msleep(AIC7XXX_RESET_DELAY);
1207 ahc_linux_release_simq(ahc);
1208 }
1209}
1210
1211int
1212ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1213{
1214
1215 ahc->platform_data =
1216 kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
1217 if (ahc->platform_data == NULL)
1218 return (ENOMEM);
1219 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1220 ahc_lockinit(ahc);
1221 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1222 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1223 if (aic7xxx_pci_parity == 0)
1224 ahc->flags |= AHC_DISABLE_PCI_PERR;
1225
1226 return (0);
1227}
1228
1229void
1230ahc_platform_free(struct ahc_softc *ahc)
1231{
1232 struct scsi_target *starget;
1233 int i;
1234
1235 if (ahc->platform_data != NULL) {
1236 /* destroy all of the device and target objects */
1237 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1238 starget = ahc->platform_data->starget[i];
1239 if (starget != NULL) {
1240 ahc->platform_data->starget[i] = NULL;
1241 }
1242 }
1243
1244 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1245 free_irq(ahc->platform_data->irq, ahc);
1246 if (ahc->tag == BUS_SPACE_PIO
1247 && ahc->bsh.ioport != 0)
1248 release_region(ahc->bsh.ioport, 256);
1249 if (ahc->tag == BUS_SPACE_MEMIO
1250 && ahc->bsh.maddr != NULL) {
1251 iounmap(ahc->bsh.maddr);
1252 release_mem_region(ahc->platform_data->mem_busaddr,
1253 0x1000);
1254 }
1255
1256 if (ahc->platform_data->host)
1257 scsi_host_put(ahc->platform_data->host);
1258
1259 kfree(ahc->platform_data);
1260 }
1261}
1262
1263void
1264ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1265{
1266 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1267 SCB_GET_CHANNEL(ahc, scb),
1268 SCB_GET_LUN(scb), SCB_LIST_NULL,
1269 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1270}
1271
1272void
1273ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1274 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1275{
1276 struct ahc_linux_device *dev;
1277 int was_queuing;
1278 int now_queuing;
1279
1280 if (sdev == NULL)
1281 return;
1282 dev = scsi_transport_device_data(sdev);
1283
1284 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1285 switch (alg) {
1286 default:
1287 case AHC_QUEUE_NONE:
1288 now_queuing = 0;
1289 break;
1290 case AHC_QUEUE_BASIC:
1291 now_queuing = AHC_DEV_Q_BASIC;
1292 break;
1293 case AHC_QUEUE_TAGGED:
1294 now_queuing = AHC_DEV_Q_TAGGED;
1295 break;
1296 }
1297 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1298 && (was_queuing != now_queuing)
1299 && (dev->active != 0)) {
1300 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1301 dev->qfrozen++;
1302 }
1303
1304 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1305 if (now_queuing) {
1306 u_int usertags;
1307
1308 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1309 if (!was_queuing) {
1310 /*
1311 * Start out aggressively and allow our
1312 * dynamic queue depth algorithm to take
1313 * care of the rest.
1314 */
1315 dev->maxtags = usertags;
1316 dev->openings = dev->maxtags - dev->active;
1317 }
1318 if (dev->maxtags == 0) {
1319 /*
1320 * Queueing is disabled by the user.
1321 */
1322 dev->openings = 1;
1323 } else if (alg == AHC_QUEUE_TAGGED) {
1324 dev->flags |= AHC_DEV_Q_TAGGED;
1325 if (aic7xxx_periodic_otag != 0)
1326 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1327 } else
1328 dev->flags |= AHC_DEV_Q_BASIC;
1329 } else {
1330 /* We can only have one opening. */
1331 dev->maxtags = 0;
1332 dev->openings = 1 - dev->active;
1333 }
1334 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1335 case AHC_DEV_Q_BASIC:
1336 case AHC_DEV_Q_TAGGED:
1337 scsi_change_queue_depth(sdev,
1338 dev->openings + dev->active);
1339 break;
1340 default:
1341 /*
1342 * We allow the OS to queue 2 untagged transactions to
1343 * us at any time even though we can only execute them
1344 * serially on the controller/device. This should
1345 * remove some latency.
1346 */
1347 scsi_change_queue_depth(sdev, 2);
1348 break;
1349 }
1350}
1351
1352int
1353ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1354 int lun, u_int tag, role_t role, uint32_t status)
1355{
1356 return 0;
1357}
1358
1359static u_int
1360ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1361{
1362 static int warned_user;
1363 u_int tags;
1364
1365 tags = 0;
1366 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1367 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
1368 if (warned_user == 0) {
1369
1370 printk(KERN_WARNING
1371"aic7xxx: WARNING: Insufficient tag_info instances\n"
1372"aic7xxx: for installed controllers. Using defaults\n"
1373"aic7xxx: Please update the aic7xxx_tag_info array in\n"
1374"aic7xxx: the aic7xxx_osm..c source file.\n");
1375 warned_user++;
1376 }
1377 tags = AHC_MAX_QUEUE;
1378 } else {
1379 adapter_tag_info_t *tag_info;
1380
1381 tag_info = &aic7xxx_tag_info[ahc->unit];
1382 tags = tag_info->tag_commands[devinfo->target_offset];
1383 if (tags > AHC_MAX_QUEUE)
1384 tags = AHC_MAX_QUEUE;
1385 }
1386 }
1387 return (tags);
1388}
1389
1390/*
1391 * Determines the queue depth for a given device.
1392 */
1393static void
1394ahc_linux_device_queue_depth(struct scsi_device *sdev)
1395{
1396 struct ahc_devinfo devinfo;
1397 u_int tags;
1398 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1399
1400 ahc_compile_devinfo(&devinfo,
1401 sdev->sdev_target->channel == 0
1402 ? ahc->our_id : ahc->our_id_b,
1403 sdev->sdev_target->id, sdev->lun,
1404 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1405 ROLE_INITIATOR);
1406 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1407 if (tags != 0 && sdev->tagged_supported != 0) {
1408
1409 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1410 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1411 devinfo.lun, AC_TRANSFER_NEG);
1412 ahc_print_devinfo(ahc, &devinfo);
1413 printk("Tagged Queuing enabled. Depth %d\n", tags);
1414 } else {
1415 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1416 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1417 devinfo.lun, AC_TRANSFER_NEG);
1418 }
1419}
1420
1421static int
1422ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1423 struct scsi_cmnd *cmd)
1424{
1425 struct scb *scb;
1426 struct hardware_scb *hscb;
1427 struct ahc_initiator_tinfo *tinfo;
1428 struct ahc_tmode_tstate *tstate;
1429 uint16_t mask;
1430 struct scb_tailq *untagged_q = NULL;
1431 int nseg;
1432
1433 /*
1434 * Schedule us to run later. The only reason we are not
1435 * running is because the whole controller Q is frozen.
1436 */
1437 if (ahc->platform_data->qfrozen != 0)
1438 return SCSI_MLQUEUE_HOST_BUSY;
1439
1440 /*
1441 * We only allow one untagged transaction
1442 * per target in the initiator role unless
1443 * we are storing a full busy target *lun*
1444 * table in SCB space.
1445 */
1446 if (!(cmd->flags & SCMD_TAGGED)
1447 && (ahc->features & AHC_SCB_BTT) == 0) {
1448 int target_offset;
1449
1450 target_offset = cmd->device->id + cmd->device->channel * 8;
1451 untagged_q = &(ahc->untagged_queues[target_offset]);
1452 if (!TAILQ_EMPTY(untagged_q))
1453 /* if we're already executing an untagged command
1454 * we're busy to another */
1455 return SCSI_MLQUEUE_DEVICE_BUSY;
1456 }
1457
1458 nseg = scsi_dma_map(cmd);
1459 if (nseg < 0)
1460 return SCSI_MLQUEUE_HOST_BUSY;
1461
1462 /*
1463 * Get an scb to use.
1464 */
1465 scb = ahc_get_scb(ahc);
1466 if (!scb) {
1467 scsi_dma_unmap(cmd);
1468 return SCSI_MLQUEUE_HOST_BUSY;
1469 }
1470
1471 scb->io_ctx = cmd;
1472 scb->platform_data->dev = dev;
1473 hscb = scb->hscb;
1474 cmd->host_scribble = (char *)scb;
1475
1476 /*
1477 * Fill out basics of the HSCB.
1478 */
1479 hscb->control = 0;
1480 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1481 hscb->lun = cmd->device->lun;
1482 mask = SCB_GET_TARGET_MASK(ahc, scb);
1483 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1484 SCB_GET_OUR_ID(scb),
1485 SCB_GET_TARGET(ahc, scb), &tstate);
1486 hscb->scsirate = tinfo->scsirate;
1487 hscb->scsioffset = tinfo->curr.offset;
1488 if ((tstate->ultraenb & mask) != 0)
1489 hscb->control |= ULTRAENB;
1490
1491 if ((ahc->user_discenable & mask) != 0)
1492 hscb->control |= DISCENB;
1493
1494 if ((tstate->auto_negotiate & mask) != 0) {
1495 scb->flags |= SCB_AUTO_NEGOTIATE;
1496 scb->hscb->control |= MK_MESSAGE;
1497 }
1498
1499 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1500 if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1501 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1502 hscb->control |= MSG_ORDERED_TASK;
1503 dev->commands_since_idle_or_otag = 0;
1504 } else {
1505 hscb->control |= MSG_SIMPLE_TASK;
1506 }
1507 }
1508
1509 hscb->cdb_len = cmd->cmd_len;
1510 if (hscb->cdb_len <= 12) {
1511 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1512 } else {
1513 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1514 scb->flags |= SCB_CDB32_PTR;
1515 }
1516
1517 scb->platform_data->xfer_len = 0;
1518 ahc_set_residual(scb, 0);
1519 ahc_set_sense_residual(scb, 0);
1520 scb->sg_count = 0;
1521
1522 if (nseg > 0) {
1523 struct ahc_dma_seg *sg;
1524 struct scatterlist *cur_seg;
1525 int i;
1526
1527 /* Copy the segments into the SG list. */
1528 sg = scb->sg_list;
1529 /*
1530 * The sg_count may be larger than nseg if
1531 * a transfer crosses a 32bit page.
1532 */
1533 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1534 dma_addr_t addr;
1535 bus_size_t len;
1536 int consumed;
1537
1538 addr = sg_dma_address(cur_seg);
1539 len = sg_dma_len(cur_seg);
1540 consumed = ahc_linux_map_seg(ahc, scb,
1541 sg, addr, len);
1542 sg += consumed;
1543 scb->sg_count += consumed;
1544 }
1545 sg--;
1546 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1547
1548 /*
1549 * Reset the sg list pointer.
1550 */
1551 scb->hscb->sgptr =
1552 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1553
1554 /*
1555 * Copy the first SG into the "current"
1556 * data pointer area.
1557 */
1558 scb->hscb->dataptr = scb->sg_list->addr;
1559 scb->hscb->datacnt = scb->sg_list->len;
1560 } else {
1561 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1562 scb->hscb->dataptr = 0;
1563 scb->hscb->datacnt = 0;
1564 scb->sg_count = 0;
1565 }
1566
1567 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1568 dev->openings--;
1569 dev->active++;
1570 dev->commands_issued++;
1571 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1572 dev->commands_since_idle_or_otag++;
1573
1574 scb->flags |= SCB_ACTIVE;
1575 if (untagged_q) {
1576 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1577 scb->flags |= SCB_UNTAGGEDQ;
1578 }
1579 ahc_queue_scb(ahc, scb);
1580 return 0;
1581}
1582
1583/*
1584 * SCSI controller interrupt handler.
1585 */
1586irqreturn_t
1587ahc_linux_isr(int irq, void *dev_id)
1588{
1589 struct ahc_softc *ahc;
1590 u_long flags;
1591 int ours;
1592
1593 ahc = (struct ahc_softc *) dev_id;
1594 ahc_lock(ahc, &flags);
1595 ours = ahc_intr(ahc);
1596 ahc_unlock(ahc, &flags);
1597 return IRQ_RETVAL(ours);
1598}
1599
1600void
1601ahc_platform_flushwork(struct ahc_softc *ahc)
1602{
1603
1604}
1605
1606void
1607ahc_send_async(struct ahc_softc *ahc, char channel,
1608 u_int target, u_int lun, ac_code code)
1609{
1610 switch (code) {
1611 case AC_TRANSFER_NEG:
1612 {
1613 struct scsi_target *starget;
1614 struct ahc_linux_target *targ;
1615 struct ahc_initiator_tinfo *tinfo;
1616 struct ahc_tmode_tstate *tstate;
1617 int target_offset;
1618 unsigned int target_ppr_options;
1619
1620 BUG_ON(target == CAM_TARGET_WILDCARD);
1621
1622 tinfo = ahc_fetch_transinfo(ahc, channel,
1623 channel == 'A' ? ahc->our_id
1624 : ahc->our_id_b,
1625 target, &tstate);
1626
1627 /*
1628 * Don't bother reporting results while
1629 * negotiations are still pending.
1630 */
1631 if (tinfo->curr.period != tinfo->goal.period
1632 || tinfo->curr.width != tinfo->goal.width
1633 || tinfo->curr.offset != tinfo->goal.offset
1634 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1635 if (bootverbose == 0)
1636 break;
1637
1638 /*
1639 * Don't bother reporting results that
1640 * are identical to those last reported.
1641 */
1642 target_offset = target;
1643 if (channel == 'B')
1644 target_offset += 8;
1645 starget = ahc->platform_data->starget[target_offset];
1646 if (starget == NULL)
1647 break;
1648 targ = scsi_transport_target_data(starget);
1649
1650 target_ppr_options =
1651 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1652 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1653 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1654
1655 if (tinfo->curr.period == spi_period(starget)
1656 && tinfo->curr.width == spi_width(starget)
1657 && tinfo->curr.offset == spi_offset(starget)
1658 && tinfo->curr.ppr_options == target_ppr_options)
1659 if (bootverbose == 0)
1660 break;
1661
1662 spi_period(starget) = tinfo->curr.period;
1663 spi_width(starget) = tinfo->curr.width;
1664 spi_offset(starget) = tinfo->curr.offset;
1665 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1666 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1667 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1668 spi_display_xfer_agreement(starget);
1669 break;
1670 }
1671 case AC_SENT_BDR:
1672 {
1673 WARN_ON(lun != CAM_LUN_WILDCARD);
1674 scsi_report_device_reset(ahc->platform_data->host,
1675 channel - 'A', target);
1676 break;
1677 }
1678 case AC_BUS_RESET:
1679 if (ahc->platform_data->host != NULL) {
1680 scsi_report_bus_reset(ahc->platform_data->host,
1681 channel - 'A');
1682 }
1683 break;
1684 default:
1685 panic("ahc_send_async: Unexpected async event");
1686 }
1687}
1688
1689/*
1690 * Calls the higher level scsi done function and frees the scb.
1691 */
1692void
1693ahc_done(struct ahc_softc *ahc, struct scb *scb)
1694{
1695 struct scsi_cmnd *cmd;
1696 struct ahc_linux_device *dev;
1697
1698 LIST_REMOVE(scb, pending_links);
1699 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1700 struct scb_tailq *untagged_q;
1701 int target_offset;
1702
1703 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1704 untagged_q = &(ahc->untagged_queues[target_offset]);
1705 TAILQ_REMOVE(untagged_q, scb, links.tqe);
1706 BUG_ON(!TAILQ_EMPTY(untagged_q));
1707 } else if ((scb->flags & SCB_ACTIVE) == 0) {
1708 /*
1709 * Transactions aborted from the untagged queue may
1710 * not have been dispatched to the controller, so
1711 * only check the SCB_ACTIVE flag for tagged transactions.
1712 */
1713 printk("SCB %d done'd twice\n", scb->hscb->tag);
1714 ahc_dump_card_state(ahc);
1715 panic("Stopping for safety");
1716 }
1717 cmd = scb->io_ctx;
1718 dev = scb->platform_data->dev;
1719 dev->active--;
1720 dev->openings++;
1721 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1722 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1723 dev->qfrozen--;
1724 }
1725 ahc_linux_unmap_scb(ahc, scb);
1726
1727 /*
1728 * Guard against stale sense data.
1729 * The Linux mid-layer assumes that sense
1730 * was retrieved anytime the first byte of
1731 * the sense buffer looks "sane".
1732 */
1733 cmd->sense_buffer[0] = 0;
1734 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1735 uint32_t amount_xferred;
1736
1737 amount_xferred =
1738 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1739 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1740#ifdef AHC_DEBUG
1741 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1742 ahc_print_path(ahc, scb);
1743 printk("Set CAM_UNCOR_PARITY\n");
1744 }
1745#endif
1746 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1747#ifdef AHC_REPORT_UNDERFLOWS
1748 /*
1749 * This code is disabled by default as some
1750 * clients of the SCSI system do not properly
1751 * initialize the underflow parameter. This
1752 * results in spurious termination of commands
1753 * that complete as expected (e.g. underflow is
1754 * allowed as command can return variable amounts
1755 * of data.
1756 */
1757 } else if (amount_xferred < scb->io_ctx->underflow) {
1758 u_int i;
1759
1760 ahc_print_path(ahc, scb);
1761 printk("CDB:");
1762 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1763 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1764 printk("\n");
1765 ahc_print_path(ahc, scb);
1766 printk("Saw underflow (%ld of %ld bytes). "
1767 "Treated as error\n",
1768 ahc_get_residual(scb),
1769 ahc_get_transfer_length(scb));
1770 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1771#endif
1772 } else {
1773 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1774 }
1775 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1776 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1777 }
1778
1779 if (dev->openings == 1
1780 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1781 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1782 dev->tag_success_count++;
1783 /*
1784 * Some devices deal with temporary internal resource
1785 * shortages by returning queue full. When the queue
1786 * full occurrs, we throttle back. Slowly try to get
1787 * back to our previous queue depth.
1788 */
1789 if ((dev->openings + dev->active) < dev->maxtags
1790 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1791 dev->tag_success_count = 0;
1792 dev->openings++;
1793 }
1794
1795 if (dev->active == 0)
1796 dev->commands_since_idle_or_otag = 0;
1797
1798 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1799 printk("Recovery SCB completes\n");
1800 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1801 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1802 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1803
1804 if (ahc->platform_data->eh_done)
1805 complete(ahc->platform_data->eh_done);
1806 }
1807
1808 ahc_free_scb(ahc, scb);
1809 ahc_linux_queue_cmd_complete(ahc, cmd);
1810}
1811
1812static void
1813ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
1814 struct scsi_device *sdev, struct scb *scb)
1815{
1816 struct ahc_devinfo devinfo;
1817 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1818
1819 ahc_compile_devinfo(&devinfo,
1820 ahc->our_id,
1821 sdev->sdev_target->id, sdev->lun,
1822 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1823 ROLE_INITIATOR);
1824
1825 /*
1826 * We don't currently trust the mid-layer to
1827 * properly deal with queue full or busy. So,
1828 * when one occurs, we tell the mid-layer to
1829 * unconditionally requeue the command to us
1830 * so that we can retry it ourselves. We also
1831 * implement our own throttling mechanism so
1832 * we don't clobber the device with too many
1833 * commands.
1834 */
1835 switch (ahc_get_scsi_status(scb)) {
1836 default:
1837 break;
1838 case SCSI_STATUS_CHECK_COND:
1839 case SCSI_STATUS_CMD_TERMINATED:
1840 {
1841 struct scsi_cmnd *cmd;
1842
1843 /*
1844 * Copy sense information to the OS's cmd
1845 * structure if it is available.
1846 */
1847 cmd = scb->io_ctx;
1848 if (scb->flags & SCB_SENSE) {
1849 u_int sense_size;
1850
1851 sense_size = min(sizeof(struct scsi_sense_data)
1852 - ahc_get_sense_residual(scb),
1853 (u_long)SCSI_SENSE_BUFFERSIZE);
1854 memcpy(cmd->sense_buffer,
1855 ahc_get_sense_buf(ahc, scb), sense_size);
1856 if (sense_size < SCSI_SENSE_BUFFERSIZE)
1857 memset(&cmd->sense_buffer[sense_size], 0,
1858 SCSI_SENSE_BUFFERSIZE - sense_size);
1859 cmd->result |= (DRIVER_SENSE << 24);
1860#ifdef AHC_DEBUG
1861 if (ahc_debug & AHC_SHOW_SENSE) {
1862 int i;
1863
1864 printk("Copied %d bytes of sense data:",
1865 sense_size);
1866 for (i = 0; i < sense_size; i++) {
1867 if ((i & 0xF) == 0)
1868 printk("\n");
1869 printk("0x%x ", cmd->sense_buffer[i]);
1870 }
1871 printk("\n");
1872 }
1873#endif
1874 }
1875 break;
1876 }
1877 case SCSI_STATUS_QUEUE_FULL:
1878 {
1879 /*
1880 * By the time the core driver has returned this
1881 * command, all other commands that were queued
1882 * to us but not the device have been returned.
1883 * This ensures that dev->active is equal to
1884 * the number of commands actually queued to
1885 * the device.
1886 */
1887 dev->tag_success_count = 0;
1888 if (dev->active != 0) {
1889 /*
1890 * Drop our opening count to the number
1891 * of commands currently outstanding.
1892 */
1893 dev->openings = 0;
1894/*
1895 ahc_print_path(ahc, scb);
1896 printk("Dropping tag count to %d\n", dev->active);
1897 */
1898 if (dev->active == dev->tags_on_last_queuefull) {
1899
1900 dev->last_queuefull_same_count++;
1901 /*
1902 * If we repeatedly see a queue full
1903 * at the same queue depth, this
1904 * device has a fixed number of tag
1905 * slots. Lock in this tag depth
1906 * so we stop seeing queue fulls from
1907 * this device.
1908 */
1909 if (dev->last_queuefull_same_count
1910 == AHC_LOCK_TAGS_COUNT) {
1911 dev->maxtags = dev->active;
1912 ahc_print_path(ahc, scb);
1913 printk("Locking max tag count at %d\n",
1914 dev->active);
1915 }
1916 } else {
1917 dev->tags_on_last_queuefull = dev->active;
1918 dev->last_queuefull_same_count = 0;
1919 }
1920 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1921 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
1922 ahc_platform_set_tags(ahc, sdev, &devinfo,
1923 (dev->flags & AHC_DEV_Q_BASIC)
1924 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1925 break;
1926 }
1927 /*
1928 * Drop down to a single opening, and treat this
1929 * as if the target returned BUSY SCSI status.
1930 */
1931 dev->openings = 1;
1932 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
1933 ahc_platform_set_tags(ahc, sdev, &devinfo,
1934 (dev->flags & AHC_DEV_Q_BASIC)
1935 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1936 break;
1937 }
1938 }
1939}
1940
1941static void
1942ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1943{
1944 /*
1945 * Map CAM error codes into Linux Error codes. We
1946 * avoid the conversion so that the DV code has the
1947 * full error information available when making
1948 * state change decisions.
1949 */
1950 {
1951 u_int new_status;
1952
1953 switch (ahc_cmd_get_transaction_status(cmd)) {
1954 case CAM_REQ_INPROG:
1955 case CAM_REQ_CMP:
1956 case CAM_SCSI_STATUS_ERROR:
1957 new_status = DID_OK;
1958 break;
1959 case CAM_REQ_ABORTED:
1960 new_status = DID_ABORT;
1961 break;
1962 case CAM_BUSY:
1963 new_status = DID_BUS_BUSY;
1964 break;
1965 case CAM_REQ_INVALID:
1966 case CAM_PATH_INVALID:
1967 new_status = DID_BAD_TARGET;
1968 break;
1969 case CAM_SEL_TIMEOUT:
1970 new_status = DID_NO_CONNECT;
1971 break;
1972 case CAM_SCSI_BUS_RESET:
1973 case CAM_BDR_SENT:
1974 new_status = DID_RESET;
1975 break;
1976 case CAM_UNCOR_PARITY:
1977 new_status = DID_PARITY;
1978 break;
1979 case CAM_CMD_TIMEOUT:
1980 new_status = DID_TIME_OUT;
1981 break;
1982 case CAM_UA_ABORT:
1983 case CAM_REQ_CMP_ERR:
1984 case CAM_AUTOSENSE_FAIL:
1985 case CAM_NO_HBA:
1986 case CAM_DATA_RUN_ERR:
1987 case CAM_UNEXP_BUSFREE:
1988 case CAM_SEQUENCE_FAIL:
1989 case CAM_CCB_LEN_ERR:
1990 case CAM_PROVIDE_FAIL:
1991 case CAM_REQ_TERMIO:
1992 case CAM_UNREC_HBA_ERROR:
1993 case CAM_REQ_TOO_BIG:
1994 new_status = DID_ERROR;
1995 break;
1996 case CAM_REQUEUE_REQ:
1997 new_status = DID_REQUEUE;
1998 break;
1999 default:
2000 /* We should never get here */
2001 new_status = DID_ERROR;
2002 break;
2003 }
2004
2005 ahc_cmd_set_transaction_status(cmd, new_status);
2006 }
2007
2008 cmd->scsi_done(cmd);
2009}
2010
2011static void
2012ahc_linux_freeze_simq(struct ahc_softc *ahc)
2013{
2014 unsigned long s;
2015
2016 ahc_lock(ahc, &s);
2017 ahc->platform_data->qfrozen++;
2018 if (ahc->platform_data->qfrozen == 1) {
2019 scsi_block_requests(ahc->platform_data->host);
2020
2021 /* XXX What about Twin channels? */
2022 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2023 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2024 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2025 }
2026 ahc_unlock(ahc, &s);
2027}
2028
2029static void
2030ahc_linux_release_simq(struct ahc_softc *ahc)
2031{
2032 u_long s;
2033 int unblock_reqs;
2034
2035 unblock_reqs = 0;
2036 ahc_lock(ahc, &s);
2037 if (ahc->platform_data->qfrozen > 0)
2038 ahc->platform_data->qfrozen--;
2039 if (ahc->platform_data->qfrozen == 0)
2040 unblock_reqs = 1;
2041 ahc_unlock(ahc, &s);
2042 /*
2043 * There is still a race here. The mid-layer
2044 * should keep its own freeze count and use
2045 * a bottom half handler to run the queues
2046 * so we can unblock with our own lock held.
2047 */
2048 if (unblock_reqs)
2049 scsi_unblock_requests(ahc->platform_data->host);
2050}
2051
2052static int
2053ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2054{
2055 struct ahc_softc *ahc;
2056 struct ahc_linux_device *dev;
2057 struct scb *pending_scb;
2058 u_int saved_scbptr;
2059 u_int active_scb_index;
2060 u_int last_phase;
2061 u_int saved_scsiid;
2062 u_int cdb_byte;
2063 int retval;
2064 int was_paused;
2065 int paused;
2066 int wait;
2067 int disconnected;
2068 unsigned long flags;
2069
2070 pending_scb = NULL;
2071 paused = FALSE;
2072 wait = FALSE;
2073 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2074
2075 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
2076 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2077
2078 printk("CDB:");
2079 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2080 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2081 printk("\n");
2082
2083 ahc_lock(ahc, &flags);
2084
2085 /*
2086 * First determine if we currently own this command.
2087 * Start by searching the device queue. If not found
2088 * there, check the pending_scb list. If not found
2089 * at all, and the system wanted us to just abort the
2090 * command, return success.
2091 */
2092 dev = scsi_transport_device_data(cmd->device);
2093
2094 if (dev == NULL) {
2095 /*
2096 * No target device for this command exists,
2097 * so we must not still own the command.
2098 */
2099 printk("%s:%d:%d:%d: Is not an active device\n",
2100 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2101 (u8)cmd->device->lun);
2102 retval = SUCCESS;
2103 goto no_cmd;
2104 }
2105
2106 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2107 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2108 cmd->device->channel + 'A',
2109 (u8)cmd->device->lun,
2110 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2111 printk("%s:%d:%d:%d: Command found on untagged queue\n",
2112 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2113 (u8)cmd->device->lun);
2114 retval = SUCCESS;
2115 goto done;
2116 }
2117
2118 /*
2119 * See if we can find a matching cmd in the pending list.
2120 */
2121 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2122 if (pending_scb->io_ctx == cmd)
2123 break;
2124 }
2125
2126 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2127
2128 /* Any SCB for this device will do for a target reset */
2129 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2130 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2131 scmd_channel(cmd) + 'A',
2132 CAM_LUN_WILDCARD,
2133 SCB_LIST_NULL, ROLE_INITIATOR))
2134 break;
2135 }
2136 }
2137
2138 if (pending_scb == NULL) {
2139 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2140 goto no_cmd;
2141 }
2142
2143 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2144 /*
2145 * We can't queue two recovery actions using the same SCB
2146 */
2147 retval = FAILED;
2148 goto done;
2149 }
2150
2151 /*
2152 * Ensure that the card doesn't do anything
2153 * behind our back and that we didn't "just" miss
2154 * an interrupt that would affect this cmd.
2155 */
2156 was_paused = ahc_is_paused(ahc);
2157 ahc_pause_and_flushwork(ahc);
2158 paused = TRUE;
2159
2160 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2161 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2162 goto no_cmd;
2163 }
2164
2165 printk("%s: At time of recovery, card was %spaused\n",
2166 ahc_name(ahc), was_paused ? "" : "not ");
2167 ahc_dump_card_state(ahc);
2168
2169 disconnected = TRUE;
2170 if (flag == SCB_ABORT) {
2171 if (ahc_search_qinfifo(ahc, cmd->device->id,
2172 cmd->device->channel + 'A',
2173 cmd->device->lun,
2174 pending_scb->hscb->tag,
2175 ROLE_INITIATOR, CAM_REQ_ABORTED,
2176 SEARCH_COMPLETE) > 0) {
2177 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2178 ahc_name(ahc), cmd->device->channel,
2179 cmd->device->id, (u8)cmd->device->lun);
2180 retval = SUCCESS;
2181 goto done;
2182 }
2183 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2184 cmd->device->channel + 'A',
2185 cmd->device->lun,
2186 pending_scb->hscb->tag,
2187 ROLE_INITIATOR, /*status*/0,
2188 SEARCH_COUNT) > 0) {
2189 disconnected = FALSE;
2190 }
2191
2192 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2193 struct scb *bus_scb;
2194
2195 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2196 if (bus_scb == pending_scb)
2197 disconnected = FALSE;
2198 else if (flag != SCB_ABORT
2199 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2200 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2201 disconnected = FALSE;
2202 }
2203
2204 /*
2205 * At this point, pending_scb is the scb associated with the
2206 * passed in command. That command is currently active on the
2207 * bus, is in the disconnected state, or we're hoping to find
2208 * a command for the same target active on the bus to abuse to
2209 * send a BDR. Queue the appropriate message based on which of
2210 * these states we are in.
2211 */
2212 last_phase = ahc_inb(ahc, LASTPHASE);
2213 saved_scbptr = ahc_inb(ahc, SCBPTR);
2214 active_scb_index = ahc_inb(ahc, SCB_TAG);
2215 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2216 if (last_phase != P_BUSFREE
2217 && (pending_scb->hscb->tag == active_scb_index
2218 || (flag == SCB_DEVICE_RESET
2219 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
2220
2221 /*
2222 * We're active on the bus, so assert ATN
2223 * and hope that the target responds.
2224 */
2225 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2226 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2227 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2228 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2229 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2230 wait = TRUE;
2231 } else if (disconnected) {
2232
2233 /*
2234 * Actually re-queue this SCB in an attempt
2235 * to select the device before it reconnects.
2236 * In either case (selection or reselection),
2237 * we will now issue the approprate message
2238 * to the timed-out device.
2239 *
2240 * Set the MK_MESSAGE control bit indicating
2241 * that we desire to send a message. We
2242 * also set the disconnected flag since
2243 * in the paging case there is no guarantee
2244 * that our SCB control byte matches the
2245 * version on the card. We don't want the
2246 * sequencer to abort the command thinking
2247 * an unsolicited reselection occurred.
2248 */
2249 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2250 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2251
2252 /*
2253 * Remove any cached copy of this SCB in the
2254 * disconnected list in preparation for the
2255 * queuing of our abort SCB. We use the
2256 * same element in the SCB, SCB_NEXT, for
2257 * both the qinfifo and the disconnected list.
2258 */
2259 ahc_search_disc_list(ahc, cmd->device->id,
2260 cmd->device->channel + 'A',
2261 cmd->device->lun, pending_scb->hscb->tag,
2262 /*stop_on_first*/TRUE,
2263 /*remove*/TRUE,
2264 /*save_state*/FALSE);
2265
2266 /*
2267 * In the non-paging case, the sequencer will
2268 * never re-reference the in-core SCB.
2269 * To make sure we are notified during
2270 * reselection, set the MK_MESSAGE flag in
2271 * the card's copy of the SCB.
2272 */
2273 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2274 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2275 ahc_outb(ahc, SCB_CONTROL,
2276 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2277 }
2278
2279 /*
2280 * Clear out any entries in the QINFIFO first
2281 * so we are the next SCB for this target
2282 * to run.
2283 */
2284 ahc_search_qinfifo(ahc, cmd->device->id,
2285 cmd->device->channel + 'A',
2286 cmd->device->lun, SCB_LIST_NULL,
2287 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2288 SEARCH_COMPLETE);
2289 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2290 ahc_outb(ahc, SCBPTR, saved_scbptr);
2291 ahc_print_path(ahc, pending_scb);
2292 printk("Device is disconnected, re-queuing SCB\n");
2293 wait = TRUE;
2294 } else {
2295 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2296 retval = FAILED;
2297 goto done;
2298 }
2299
2300no_cmd:
2301 /*
2302 * Our assumption is that if we don't have the command, no
2303 * recovery action was required, so we return success. Again,
2304 * the semantics of the mid-layer recovery engine are not
2305 * well defined, so this may change in time.
2306 */
2307 retval = SUCCESS;
2308done:
2309 if (paused)
2310 ahc_unpause(ahc);
2311 if (wait) {
2312 DECLARE_COMPLETION_ONSTACK(done);
2313
2314 ahc->platform_data->eh_done = &done;
2315 ahc_unlock(ahc, &flags);
2316
2317 printk("Recovery code sleeping\n");
2318 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2319 ahc_lock(ahc, &flags);
2320 ahc->platform_data->eh_done = NULL;
2321 ahc_unlock(ahc, &flags);
2322
2323 printk("Timer Expired\n");
2324 retval = FAILED;
2325 }
2326 printk("Recovery code awake\n");
2327 } else
2328 ahc_unlock(ahc, &flags);
2329 return (retval);
2330}
2331
2332void
2333ahc_platform_dump_card_state(struct ahc_softc *ahc)
2334{
2335}
2336
2337static void ahc_linux_set_width(struct scsi_target *starget, int width)
2338{
2339 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2340 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2341 struct ahc_devinfo devinfo;
2342 unsigned long flags;
2343
2344 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2345 starget->channel + 'A', ROLE_INITIATOR);
2346 ahc_lock(ahc, &flags);
2347 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2348 ahc_unlock(ahc, &flags);
2349}
2350
2351static void ahc_linux_set_period(struct scsi_target *starget, int period)
2352{
2353 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2354 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2355 struct ahc_tmode_tstate *tstate;
2356 struct ahc_initiator_tinfo *tinfo
2357 = ahc_fetch_transinfo(ahc,
2358 starget->channel + 'A',
2359 shost->this_id, starget->id, &tstate);
2360 struct ahc_devinfo devinfo;
2361 unsigned int ppr_options = tinfo->goal.ppr_options;
2362 unsigned long flags;
2363 unsigned long offset = tinfo->goal.offset;
2364 const struct ahc_syncrate *syncrate;
2365
2366 if (offset == 0)
2367 offset = MAX_OFFSET;
2368
2369 if (period < 9)
2370 period = 9; /* 12.5ns is our minimum */
2371 if (period == 9) {
2372 if (spi_max_width(starget))
2373 ppr_options |= MSG_EXT_PPR_DT_REQ;
2374 else
2375 /* need wide for DT and need DT for 12.5 ns */
2376 period = 10;
2377 }
2378
2379 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2380 starget->channel + 'A', ROLE_INITIATOR);
2381
2382 /* all PPR requests apart from QAS require wide transfers */
2383 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2384 if (spi_width(starget) == 0)
2385 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2386 }
2387
2388 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2389 ahc_lock(ahc, &flags);
2390 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2391 ppr_options, AHC_TRANS_GOAL, FALSE);
2392 ahc_unlock(ahc, &flags);
2393}
2394
2395static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2396{
2397 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2398 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2399 struct ahc_tmode_tstate *tstate;
2400 struct ahc_initiator_tinfo *tinfo
2401 = ahc_fetch_transinfo(ahc,
2402 starget->channel + 'A',
2403 shost->this_id, starget->id, &tstate);
2404 struct ahc_devinfo devinfo;
2405 unsigned int ppr_options = 0;
2406 unsigned int period = 0;
2407 unsigned long flags;
2408 const struct ahc_syncrate *syncrate = NULL;
2409
2410 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2411 starget->channel + 'A', ROLE_INITIATOR);
2412 if (offset != 0) {
2413 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2414 period = tinfo->goal.period;
2415 ppr_options = tinfo->goal.ppr_options;
2416 }
2417 ahc_lock(ahc, &flags);
2418 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2419 ppr_options, AHC_TRANS_GOAL, FALSE);
2420 ahc_unlock(ahc, &flags);
2421}
2422
2423static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2424{
2425 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2426 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2427 struct ahc_tmode_tstate *tstate;
2428 struct ahc_initiator_tinfo *tinfo
2429 = ahc_fetch_transinfo(ahc,
2430 starget->channel + 'A',
2431 shost->this_id, starget->id, &tstate);
2432 struct ahc_devinfo devinfo;
2433 unsigned int ppr_options = tinfo->goal.ppr_options
2434 & ~MSG_EXT_PPR_DT_REQ;
2435 unsigned int period = tinfo->goal.period;
2436 unsigned int width = tinfo->goal.width;
2437 unsigned long flags;
2438 const struct ahc_syncrate *syncrate;
2439
2440 if (dt && spi_max_width(starget)) {
2441 ppr_options |= MSG_EXT_PPR_DT_REQ;
2442 if (!width)
2443 ahc_linux_set_width(starget, 1);
2444 } else if (period == 9)
2445 period = 10; /* if resetting DT, period must be >= 25ns */
2446
2447 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2448 starget->channel + 'A', ROLE_INITIATOR);
2449 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
2450 ahc_lock(ahc, &flags);
2451 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2452 ppr_options, AHC_TRANS_GOAL, FALSE);
2453 ahc_unlock(ahc, &flags);
2454}
2455
2456#if 0
2457/* FIXME: This code claims to support IU and QAS. However, the actual
2458 * sequencer code and aic7xxx_core have no support for these parameters and
2459 * will get into a bad state if they're negotiated. Do not enable this
2460 * unless you know what you're doing */
2461static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2462{
2463 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2464 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2465 struct ahc_tmode_tstate *tstate;
2466 struct ahc_initiator_tinfo *tinfo
2467 = ahc_fetch_transinfo(ahc,
2468 starget->channel + 'A',
2469 shost->this_id, starget->id, &tstate);
2470 struct ahc_devinfo devinfo;
2471 unsigned int ppr_options = tinfo->goal.ppr_options
2472 & ~MSG_EXT_PPR_QAS_REQ;
2473 unsigned int period = tinfo->goal.period;
2474 unsigned long flags;
2475 struct ahc_syncrate *syncrate;
2476
2477 if (qas)
2478 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2479
2480 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2481 starget->channel + 'A', ROLE_INITIATOR);
2482 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2483 ahc_lock(ahc, &flags);
2484 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2485 ppr_options, AHC_TRANS_GOAL, FALSE);
2486 ahc_unlock(ahc, &flags);
2487}
2488
2489static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2490{
2491 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2492 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2493 struct ahc_tmode_tstate *tstate;
2494 struct ahc_initiator_tinfo *tinfo
2495 = ahc_fetch_transinfo(ahc,
2496 starget->channel + 'A',
2497 shost->this_id, starget->id, &tstate);
2498 struct ahc_devinfo devinfo;
2499 unsigned int ppr_options = tinfo->goal.ppr_options
2500 & ~MSG_EXT_PPR_IU_REQ;
2501 unsigned int period = tinfo->goal.period;
2502 unsigned long flags;
2503 struct ahc_syncrate *syncrate;
2504
2505 if (iu)
2506 ppr_options |= MSG_EXT_PPR_IU_REQ;
2507
2508 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2509 starget->channel + 'A', ROLE_INITIATOR);
2510 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2511 ahc_lock(ahc, &flags);
2512 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2513 ppr_options, AHC_TRANS_GOAL, FALSE);
2514 ahc_unlock(ahc, &flags);
2515}
2516#endif
2517
2518static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2519{
2520 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
2521 unsigned long flags;
2522 u8 mode;
2523
2524 if (!(ahc->features & AHC_ULTRA2)) {
2525 /* non-LVD chipset, may not have SBLKCTL reg */
2526 spi_signalling(shost) =
2527 ahc->features & AHC_HVD ?
2528 SPI_SIGNAL_HVD :
2529 SPI_SIGNAL_SE;
2530 return;
2531 }
2532
2533 ahc_lock(ahc, &flags);
2534 ahc_pause(ahc);
2535 mode = ahc_inb(ahc, SBLKCTL);
2536 ahc_unpause(ahc);
2537 ahc_unlock(ahc, &flags);
2538
2539 if (mode & ENAB40)
2540 spi_signalling(shost) = SPI_SIGNAL_LVD;
2541 else if (mode & ENAB20)
2542 spi_signalling(shost) = SPI_SIGNAL_SE;
2543 else
2544 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2545}
2546
2547static struct spi_function_template ahc_linux_transport_functions = {
2548 .set_offset = ahc_linux_set_offset,
2549 .show_offset = 1,
2550 .set_period = ahc_linux_set_period,
2551 .show_period = 1,
2552 .set_width = ahc_linux_set_width,
2553 .show_width = 1,
2554 .set_dt = ahc_linux_set_dt,
2555 .show_dt = 1,
2556#if 0
2557 .set_iu = ahc_linux_set_iu,
2558 .show_iu = 1,
2559 .set_qas = ahc_linux_set_qas,
2560 .show_qas = 1,
2561#endif
2562 .get_signalling = ahc_linux_get_signalling,
2563};
2564
2565
2566
2567static int __init
2568ahc_linux_init(void)
2569{
2570 /*
2571 * If we've been passed any parameters, process them now.
2572 */
2573 if (aic7xxx)
2574 aic7xxx_setup(aic7xxx);
2575
2576 ahc_linux_transport_template =
2577 spi_attach_transport(&ahc_linux_transport_functions);
2578 if (!ahc_linux_transport_template)
2579 return -ENODEV;
2580
2581 scsi_transport_reserve_device(ahc_linux_transport_template,
2582 sizeof(struct ahc_linux_device));
2583
2584 ahc_linux_pci_init();
2585 ahc_linux_eisa_init();
2586 return 0;
2587}
2588
2589static void
2590ahc_linux_exit(void)
2591{
2592 ahc_linux_pci_exit();
2593 ahc_linux_eisa_exit();
2594 spi_release_transport(ahc_linux_transport_template);
2595}
2596
2597module_init(ahc_linux_init);
2598module_exit(ahc_linux_exit);