1
2 /*
3 * Adaptec AIC7xxx device driver for Linux.
4 *
5 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
6 *
7 * Copyright (c) 1994 John Aycock
8 * The University of Calgary Department of Computer Science.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; see the file COPYING. If not, write to
22 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 *
24 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
25 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
26 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
27 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
28 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
29 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
30 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
31 * ANSI SCSI-2 specification (draft 10c), ...
32 *
33 * --------------------------------------------------------------------------
34 *
35 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
36 *
37 * Substantially modified to include support for wide and twin bus
38 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
39 * SCB paging, and other rework of the code.
40 *
41 * --------------------------------------------------------------------------
42 * Copyright (c) 1994-2000 Justin T. Gibbs.
43 * Copyright (c) 2000-2001 Adaptec Inc.
44 * All rights reserved.
45 *
46 * Redistribution and use in source and binary forms, with or without
47 * modification, are permitted provided that the following conditions
48 * are met:
49 * 1. Redistributions of source code must retain the above copyright
50 * notice, this list of conditions, and the following disclaimer,
51 * without modification.
52 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
53 * substantially similar to the "NO WARRANTY" disclaimer below
54 * ("Disclaimer") and any redistribution must be conditioned upon
55 * including a substantially similar Disclaimer requirement for further
56 * binary redistribution.
57 * 3. Neither the names of the above-listed copyright holders nor the names
58 * of any contributors may be used to endorse or promote products derived
59 * from this software without specific prior written permission.
60 *
61 * Alternatively, this software may be distributed under the terms of the
62 * GNU General Public License ("GPL") version 2 as published by the Free
63 * Software Foundation.
64 *
65 * NO WARRANTY
66 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
67 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
68 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
69 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
70 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
71 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
72 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
73 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
74 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
75 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
76 * POSSIBILITY OF SUCH DAMAGES.
77 *
78 *---------------------------------------------------------------------------
79 *
80 * Thanks also go to (in alphabetical order) the following:
81 *
82 * Rory Bolt - Sequencer bug fixes
83 * Jay Estabrook - Initial DEC Alpha support
84 * Doug Ledford - Much needed abort/reset bug fixes
85 * Kai Makisara - DMAing of SCBs
86 *
87 * A Boot time option was also added for not resetting the scsi bus.
88 *
89 * Form: aic7xxx=extended
90 * aic7xxx=no_reset
91 * aic7xxx=verbose
92 *
93 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
94 *
95 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
96 */
97
98 /*
99 * Further driver modifications made by Doug Ledford <dledford@redhat.com>
100 *
101 * Copyright (c) 1997-1999 Doug Ledford
102 *
103 * These changes are released under the same licensing terms as the FreeBSD
104 * driver written by Justin Gibbs. Please see his Copyright notice above
105 * for the exact terms and conditions covering my changes as well as the
106 * warranty statement.
107 *
108 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
109 * but are not limited to:
110 *
111 * 1: Import of the latest FreeBSD sequencer code for this driver
112 * 2: Modification of kernel code to accommodate different sequencer semantics
113 * 3: Extensive changes throughout kernel portion of driver to improve
114 * abort/reset processing and error hanndling
115 * 4: Other work contributed by various people on the Internet
116 * 5: Changes to printk information and verbosity selection code
117 * 6: General reliability related changes, especially in IRQ management
118 * 7: Modifications to the default probe/attach order for supported cards
119 * 8: SMP friendliness has been improved
120 *
121 */
122
123 #include "aic7xxx_osm.h"
124 #include "aic7xxx_inline.h"
125 #include <scsi/scsicam.h>
126
127 static struct scsi_transport_template *ahc_linux_transport_template = NULL;
128
129 #include <linux/init.h> /* __setup */
130 #include <linux/mm.h> /* For fetching system memory size */
131 #include <linux/blkdev.h> /* For block_size() */
132 #include <linux/delay.h> /* For ssleep/msleep */
133 #include <linux/slab.h>
134
135
136 /*
137 * Set this to the delay in seconds after SCSI bus reset.
138 * Note, we honor this only for the initial bus reset.
139 * The scsi error recovery code performs its own bus settle
140 * delay handling for error recovery actions.
141 */
142 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
143 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
144 #else
145 #define AIC7XXX_RESET_DELAY 5000
146 #endif
147
148 /*
149 * To change the default number of tagged transactions allowed per-device,
150 * add a line to the lilo.conf file like:
151 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
152 * which will result in the first four devices on the first two
153 * controllers being set to a tagged queue depth of 32.
154 *
155 * The tag_commands is an array of 16 to allow for wide and twin adapters.
156 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
157 * for channel 1.
158 */
159 typedef struct {
160 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
161 } adapter_tag_info_t;
162
163 /*
164 * Modify this as you see fit for your system.
165 *
166 * 0 tagged queuing disabled
167 * 1 <= n <= 253 n == max tags ever dispatched.
168 *
169 * The driver will throttle the number of commands dispatched to a
170 * device if it returns queue full. For devices with a fixed maximum
171 * queue depth, the driver will eventually determine this depth and
172 * lock it in (a console message is printed to indicate that a lock
173 * has occurred). On some devices, queue full is returned for a temporary
174 * resource shortage. These devices will return queue full at varying
175 * depths. The driver will throttle back when the queue fulls occur and
176 * attempt to slowly increase the depth over time as the device recovers
177 * from the resource shortage.
178 *
179 * In this example, the first line will disable tagged queueing for all
180 * the devices on the first probed aic7xxx adapter.
181 *
182 * The second line enables tagged queueing with 4 commands/LUN for IDs
183 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
184 * driver to attempt to use up to 64 tags for ID 1.
185 *
186 * The third line is the same as the first line.
187 *
188 * The fourth line disables tagged queueing for devices 0 and 3. It
189 * enables tagged queueing for the other IDs, with 16 commands/LUN
190 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
191 * IDs 2, 5-7, and 9-15.
192 */
193
194 /*
195 * NOTE: The below structure is for reference only, the actual structure
196 * to modify in order to change things is just below this comment block.
197 adapter_tag_info_t aic7xxx_tag_info[] =
198 {
199 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
200 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
201 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
202 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
203 };
204 */
205
206 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
207 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
208 #else
209 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
210 #endif
211
212 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \
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 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
221 }
222
223 /*
224 * By default, use the number of commands specified by
225 * the users kernel configuration.
226 */
227 static adapter_tag_info_t aic7xxx_tag_info[] =
228 {
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 {AIC7XXX_CONFIGED_TAG_COMMANDS}
245 };
246
247 /*
248 * There should be a specific return value for this in scsi.h, but
249 * it seems that most drivers ignore it.
250 */
251 #define DID_UNDERFLOW DID_ERROR
252
253 void
ahc_print_path(struct ahc_softc * ahc,struct scb * scb)254 ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
255 {
256 printk("(scsi%d:%c:%d:%d): ",
257 ahc->platform_data->host->host_no,
258 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
259 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
260 scb != NULL ? SCB_GET_LUN(scb) : -1);
261 }
262
263 /*
264 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
265 * cards in the system. This should be fixed. Exceptions to this
266 * rule are noted in the comments.
267 */
268
269 /*
270 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
271 * has no effect on any later resets that might occur due to things like
272 * SCSI bus timeouts.
273 */
274 static uint32_t aic7xxx_no_reset;
275
276 /*
277 * Should we force EXTENDED translation on a controller.
278 * 0 == Use whatever is in the SEEPROM or default to off
279 * 1 == Use whatever is in the SEEPROM or default to on
280 */
281 static uint32_t aic7xxx_extended;
282
283 /*
284 * PCI bus parity checking of the Adaptec controllers. This is somewhat
285 * dubious at best. To my knowledge, this option has never actually
286 * solved a PCI parity problem, but on certain machines with broken PCI
287 * chipset configurations where stray PCI transactions with bad parity are
288 * the norm rather than the exception, the error messages can be overwhelming.
289 * It's included in the driver for completeness.
290 * 0 = Shut off PCI parity check
291 * non-0 = reverse polarity pci parity checking
292 */
293 static uint32_t aic7xxx_pci_parity = ~0;
294
295 /*
296 * There are lots of broken chipsets in the world. Some of them will
297 * violate the PCI spec when we issue byte sized memory writes to our
298 * controller. I/O mapped register access, if allowed by the given
299 * platform, will work in almost all cases.
300 */
301 uint32_t aic7xxx_allow_memio = ~0;
302
303 /*
304 * So that we can set how long each device is given as a selection timeout.
305 * The table of values goes like this:
306 * 0 - 256ms
307 * 1 - 128ms
308 * 2 - 64ms
309 * 3 - 32ms
310 * We default to 256ms because some older devices need a longer time
311 * to respond to initial selection.
312 */
313 static uint32_t aic7xxx_seltime;
314
315 /*
316 * Certain devices do not perform any aging on commands. Should the
317 * device be saturated by commands in one portion of the disk, it is
318 * possible for transactions on far away sectors to never be serviced.
319 * To handle these devices, we can periodically send an ordered tag to
320 * force all outstanding transactions to be serviced prior to a new
321 * transaction.
322 */
323 static uint32_t aic7xxx_periodic_otag;
324
325 /*
326 * Module information and settable options.
327 */
328 static char *aic7xxx = NULL;
329
330 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
331 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");
332 MODULE_LICENSE("Dual BSD/GPL");
333 MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
334 module_param(aic7xxx, charp, 0444);
335 MODULE_PARM_DESC(aic7xxx,
336 "period-delimited options string:\n"
337 " verbose Enable verbose/diagnostic logging\n"
338 " allow_memio Allow device registers to be memory mapped\n"
339 " debug Bitmask of debug values to enable\n"
340 " no_probe Toggle EISA/VLB controller probing\n"
341 " probe_eisa_vl Toggle EISA/VLB controller probing\n"
342 " no_reset Suppress initial bus resets\n"
343 " extended Enable extended geometry on all controllers\n"
344 " periodic_otag Send an ordered tagged transaction\n"
345 " periodically to prevent tag starvation.\n"
346 " This may be required by some older disk\n"
347 " drives or RAID arrays.\n"
348 " tag_info:<tag_str> Set per-target tag depth\n"
349 " global_tag_depth:<int> Global tag depth for every target\n"
350 " on every bus\n"
351 " seltime:<int> Selection Timeout\n"
352 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
353 "\n"
354 " Sample modprobe configuration file:\n"
355 " # Toggle EISA/VLB probing\n"
356 " # Set tag depth on Controller 1/Target 1 to 10 tags\n"
357 " # Shorten the selection timeout to 128ms\n"
358 "\n"
359 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
360 );
361
362 static void ahc_linux_handle_scsi_status(struct ahc_softc *,
363 struct scsi_device *,
364 struct scb *);
365 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
366 struct scsi_cmnd *cmd);
367 static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
368 static void ahc_linux_release_simq(struct ahc_softc *ahc);
369 static int ahc_linux_queue_recovery_cmd(struct scsi_device *sdev,
370 struct scsi_cmnd *cmd);
371 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
372 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
373 struct ahc_devinfo *devinfo);
374 static void ahc_linux_device_queue_depth(struct scsi_device *);
375 static int ahc_linux_run_command(struct ahc_softc*,
376 struct ahc_linux_device *,
377 struct scsi_cmnd *);
378 static void ahc_linux_setup_tag_info_global(char *p);
379 static int aic7xxx_setup(char *s);
380
381 static int ahc_linux_unit;
382
383
384 /************************** OS Utility Wrappers *******************************/
385 void
ahc_delay(long usec)386 ahc_delay(long usec)
387 {
388 /*
389 * udelay on Linux can have problems for
390 * multi-millisecond waits. Wait at most
391 * 1024us per call.
392 */
393 while (usec > 0) {
394 udelay(usec % 1024);
395 usec -= 1024;
396 }
397 }
398
399 /***************************** Low Level I/O **********************************/
400 uint8_t
ahc_inb(struct ahc_softc * ahc,long port)401 ahc_inb(struct ahc_softc * ahc, long port)
402 {
403 uint8_t x;
404
405 if (ahc->tag == BUS_SPACE_MEMIO) {
406 x = readb(ahc->bsh.maddr + port);
407 } else {
408 x = inb(ahc->bsh.ioport + port);
409 }
410 mb();
411 return (x);
412 }
413
414 void
ahc_outb(struct ahc_softc * ahc,long port,uint8_t val)415 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
416 {
417 if (ahc->tag == BUS_SPACE_MEMIO) {
418 writeb(val, ahc->bsh.maddr + port);
419 } else {
420 outb(val, ahc->bsh.ioport + port);
421 }
422 mb();
423 }
424
425 void
ahc_outsb(struct ahc_softc * ahc,long port,uint8_t * array,int count)426 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
427 {
428 int i;
429
430 /*
431 * There is probably a more efficient way to do this on Linux
432 * but we don't use this for anything speed critical and this
433 * should work.
434 */
435 for (i = 0; i < count; i++)
436 ahc_outb(ahc, port, *array++);
437 }
438
439 void
ahc_insb(struct ahc_softc * ahc,long port,uint8_t * array,int count)440 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
441 {
442 int i;
443
444 /*
445 * There is probably a more efficient way to do this on Linux
446 * but we don't use this for anything speed critical and this
447 * should work.
448 */
449 for (i = 0; i < count; i++)
450 *array++ = ahc_inb(ahc, port);
451 }
452
453 /********************************* Inlines ************************************/
454 static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
455
456 static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
457 struct ahc_dma_seg *sg,
458 dma_addr_t addr, bus_size_t len);
459
460 static void
ahc_linux_unmap_scb(struct ahc_softc * ahc,struct scb * scb)461 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
462 {
463 struct scsi_cmnd *cmd;
464
465 cmd = scb->io_ctx;
466 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
467
468 scsi_dma_unmap(cmd);
469 }
470
471 static int
ahc_linux_map_seg(struct ahc_softc * ahc,struct scb * scb,struct ahc_dma_seg * sg,dma_addr_t addr,bus_size_t len)472 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
473 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
474 {
475 int consumed;
476
477 if ((scb->sg_count + 1) > AHC_NSEG)
478 panic("Too few segs for dma mapping. "
479 "Increase AHC_NSEG\n");
480
481 consumed = 1;
482 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
483 scb->platform_data->xfer_len += len;
484
485 if (sizeof(dma_addr_t) > 4
486 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
487 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
488
489 sg->len = ahc_htole32(len);
490 return (consumed);
491 }
492
493 /*
494 * Return a string describing the driver.
495 */
496 static const char *
ahc_linux_info(struct Scsi_Host * host)497 ahc_linux_info(struct Scsi_Host *host)
498 {
499 static char buffer[512];
500 char ahc_info[256];
501 char *bp;
502 struct ahc_softc *ahc;
503
504 bp = &buffer[0];
505 ahc = *(struct ahc_softc **)host->hostdata;
506 memset(bp, 0, sizeof(buffer));
507 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n"
508 " <");
509 strcat(bp, ahc->description);
510 strcat(bp, ">\n"
511 " ");
512 ahc_controller_info(ahc, ahc_info);
513 strcat(bp, ahc_info);
514 strcat(bp, "\n");
515
516 return (bp);
517 }
518
519 /*
520 * Queue an SCB to the controller.
521 */
ahc_linux_queue_lck(struct scsi_cmnd * cmd)522 static int ahc_linux_queue_lck(struct scsi_cmnd *cmd)
523 {
524 struct ahc_softc *ahc;
525 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
526 int rtn = SCSI_MLQUEUE_HOST_BUSY;
527 unsigned long flags;
528
529 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
530
531 ahc_lock(ahc, &flags);
532 if (ahc->platform_data->qfrozen == 0) {
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
DEF_SCSI_QCMD(ahc_linux_queue)541 static DEF_SCSI_QCMD(ahc_linux_queue)
542
543 static inline struct scsi_target **
544 ahc_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
557 static int
ahc_linux_target_alloc(struct scsi_target * starget)558 ahc_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 char channel = starget->channel + 'A';
568 unsigned int our_id = ahc->our_id;
569 unsigned int target_offset;
570
571 target_offset = starget->id;
572 if (starget->channel != 0)
573 target_offset += 8;
574
575 if (starget->channel)
576 our_id = ahc->our_id_b;
577
578 ahc_lock(ahc, &flags);
579
580 BUG_ON(*ahc_targp != NULL);
581
582 *ahc_targp = starget;
583
584 if (sc) {
585 int maxsync = AHC_SYNCRATE_DT;
586 int ultra = 0;
587 int flags = sc->device_flags[target_offset];
588
589 if (ahc->flags & AHC_NEWEEPROM_FMT) {
590 if (flags & CFSYNCHISULTRA)
591 ultra = 1;
592 } else if (flags & CFULTRAEN)
593 ultra = 1;
594 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
595 * change it to ultra=0, CFXFER = 0 */
596 if(ultra && (flags & CFXFER) == 0x04) {
597 ultra = 0;
598 flags &= ~CFXFER;
599 }
600
601 if ((ahc->features & AHC_ULTRA2) != 0) {
602 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
603 } else {
604 scsirate = (flags & CFXFER) << 4;
605 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
606 AHC_SYNCRATE_FAST;
607 }
608 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
609 if (!(flags & CFSYNCH))
610 spi_max_offset(starget) = 0;
611 spi_min_period(starget) =
612 ahc_find_period(ahc, scsirate, maxsync);
613 }
614 ahc_compile_devinfo(&devinfo, our_id, starget->id,
615 CAM_LUN_WILDCARD, channel,
616 ROLE_INITIATOR);
617 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
618 AHC_TRANS_GOAL, /*paused*/FALSE);
619 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
620 AHC_TRANS_GOAL, /*paused*/FALSE);
621 ahc_unlock(ahc, &flags);
622
623 return 0;
624 }
625
626 static void
ahc_linux_target_destroy(struct scsi_target * starget)627 ahc_linux_target_destroy(struct scsi_target *starget)
628 {
629 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
630
631 *ahc_targp = NULL;
632 }
633
634 static int
ahc_linux_slave_alloc(struct scsi_device * sdev)635 ahc_linux_slave_alloc(struct scsi_device *sdev)
636 {
637 struct ahc_softc *ahc =
638 *((struct ahc_softc **)sdev->host->hostdata);
639 struct scsi_target *starget = sdev->sdev_target;
640 struct ahc_linux_device *dev;
641
642 if (bootverbose)
643 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
644
645 dev = scsi_transport_device_data(sdev);
646 memset(dev, 0, sizeof(*dev));
647
648 /*
649 * We start out life using untagged
650 * transactions of which we allow one.
651 */
652 dev->openings = 1;
653
654 /*
655 * Set maxtags to 0. This will be changed if we
656 * later determine that we are dealing with
657 * a tagged queuing capable device.
658 */
659 dev->maxtags = 0;
660
661 spi_period(starget) = 0;
662
663 return 0;
664 }
665
666 static int
ahc_linux_slave_configure(struct scsi_device * sdev)667 ahc_linux_slave_configure(struct scsi_device *sdev)
668 {
669 if (bootverbose)
670 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
671
672 ahc_linux_device_queue_depth(sdev);
673
674 /* Initial Domain Validation */
675 if (!spi_initial_dv(sdev->sdev_target))
676 spi_dv_device(sdev);
677
678 return 0;
679 }
680
681 #if defined(__i386__)
682 /*
683 * Return the disk geometry for the given SCSI device.
684 */
685 static int
ahc_linux_biosparam(struct scsi_device * sdev,struct block_device * bdev,sector_t capacity,int geom[])686 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
687 sector_t capacity, int geom[])
688 {
689 int heads;
690 int sectors;
691 int cylinders;
692 int extended;
693 struct ahc_softc *ahc;
694 u_int channel;
695
696 ahc = *((struct ahc_softc **)sdev->host->hostdata);
697 channel = sdev_channel(sdev);
698
699 if (scsi_partsize(bdev, capacity, geom))
700 return 0;
701
702 heads = 64;
703 sectors = 32;
704 cylinders = aic_sector_div(capacity, heads, sectors);
705
706 if (aic7xxx_extended != 0)
707 extended = 1;
708 else if (channel == 0)
709 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
710 else
711 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
712 if (extended && cylinders >= 1024) {
713 heads = 255;
714 sectors = 63;
715 cylinders = aic_sector_div(capacity, heads, sectors);
716 }
717 geom[0] = heads;
718 geom[1] = sectors;
719 geom[2] = cylinders;
720 return (0);
721 }
722 #endif
723
724 /*
725 * Abort the current SCSI command(s).
726 */
727 static int
ahc_linux_abort(struct scsi_cmnd * cmd)728 ahc_linux_abort(struct scsi_cmnd *cmd)
729 {
730 int error;
731
732 error = ahc_linux_queue_recovery_cmd(cmd->device, cmd);
733 if (error != SUCCESS)
734 printk("aic7xxx_abort returns 0x%x\n", error);
735 return (error);
736 }
737
738 /*
739 * Attempt to send a target reset message to the device that timed out.
740 */
741 static int
ahc_linux_dev_reset(struct scsi_cmnd * cmd)742 ahc_linux_dev_reset(struct scsi_cmnd *cmd)
743 {
744 int error;
745
746 error = ahc_linux_queue_recovery_cmd(cmd->device, NULL);
747 if (error != SUCCESS)
748 printk("aic7xxx_dev_reset returns 0x%x\n", error);
749 return (error);
750 }
751
752 /*
753 * Reset the SCSI bus.
754 */
755 static int
ahc_linux_bus_reset(struct scsi_cmnd * cmd)756 ahc_linux_bus_reset(struct scsi_cmnd *cmd)
757 {
758 struct ahc_softc *ahc;
759 int found;
760 unsigned long flags;
761
762 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
763
764 ahc_lock(ahc, &flags);
765 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
766 /*initiate reset*/TRUE);
767 ahc_unlock(ahc, &flags);
768
769 if (bootverbose)
770 printk("%s: SCSI bus reset delivered. "
771 "%d SCBs aborted.\n", ahc_name(ahc), found);
772
773 return SUCCESS;
774 }
775
776 struct scsi_host_template aic7xxx_driver_template = {
777 .module = THIS_MODULE,
778 .name = "aic7xxx",
779 .proc_name = "aic7xxx",
780 .show_info = ahc_linux_show_info,
781 .write_info = ahc_proc_write_seeprom,
782 .info = ahc_linux_info,
783 .queuecommand = ahc_linux_queue,
784 .eh_abort_handler = ahc_linux_abort,
785 .eh_device_reset_handler = ahc_linux_dev_reset,
786 .eh_bus_reset_handler = ahc_linux_bus_reset,
787 #if defined(__i386__)
788 .bios_param = ahc_linux_biosparam,
789 #endif
790 .can_queue = AHC_MAX_QUEUE,
791 .this_id = -1,
792 .max_sectors = 8192,
793 .cmd_per_lun = 2,
794 .slave_alloc = ahc_linux_slave_alloc,
795 .slave_configure = ahc_linux_slave_configure,
796 .target_alloc = ahc_linux_target_alloc,
797 .target_destroy = ahc_linux_target_destroy,
798 };
799
800 /**************************** Tasklet Handler *********************************/
801
802
ahc_build_scsiid(struct ahc_softc * ahc,struct scsi_device * sdev)803 static inline unsigned int ahc_build_scsiid(struct ahc_softc *ahc,
804 struct scsi_device *sdev)
805 {
806 unsigned int scsiid = (sdev->id << TID_SHIFT) & TID;
807
808 if (sdev->channel == 0)
809 scsiid |= ahc->our_id;
810 else
811 scsiid |= ahc->our_id_b | TWIN_CHNLB;
812 return scsiid;
813 }
814
815 /******************************** Bus DMA *************************************/
816 int
ahc_dma_tag_create(struct ahc_softc * ahc,bus_dma_tag_t parent,bus_size_t alignment,bus_size_t boundary,dma_addr_t lowaddr,dma_addr_t highaddr,bus_dma_filter_t * filter,void * filterarg,bus_size_t maxsize,int nsegments,bus_size_t maxsegsz,int flags,bus_dma_tag_t * ret_tag)817 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
818 bus_size_t alignment, bus_size_t boundary,
819 dma_addr_t lowaddr, dma_addr_t highaddr,
820 bus_dma_filter_t *filter, void *filterarg,
821 bus_size_t maxsize, int nsegments,
822 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
823 {
824 bus_dma_tag_t dmat;
825
826 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
827 if (dmat == NULL)
828 return (ENOMEM);
829
830 /*
831 * Linux is very simplistic about DMA memory. For now don't
832 * maintain all specification information. Once Linux supplies
833 * better facilities for doing these operations, or the
834 * needs of this particular driver change, we might need to do
835 * more here.
836 */
837 dmat->alignment = alignment;
838 dmat->boundary = boundary;
839 dmat->maxsize = maxsize;
840 *ret_tag = dmat;
841 return (0);
842 }
843
844 void
ahc_dma_tag_destroy(struct ahc_softc * ahc,bus_dma_tag_t dmat)845 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
846 {
847 kfree(dmat);
848 }
849
850 int
ahc_dmamem_alloc(struct ahc_softc * ahc,bus_dma_tag_t dmat,void ** vaddr,int flags,bus_dmamap_t * mapp)851 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
852 int flags, bus_dmamap_t *mapp)
853 {
854 /* XXX: check if we really need the GFP_ATOMIC and unwind this mess! */
855 *vaddr = dma_alloc_coherent(ahc->dev, dmat->maxsize, mapp, GFP_ATOMIC);
856 if (*vaddr == NULL)
857 return ENOMEM;
858 return 0;
859 }
860
861 void
ahc_dmamem_free(struct ahc_softc * ahc,bus_dma_tag_t dmat,void * vaddr,bus_dmamap_t map)862 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
863 void* vaddr, bus_dmamap_t map)
864 {
865 dma_free_coherent(ahc->dev, dmat->maxsize, vaddr, map);
866 }
867
868 int
ahc_dmamap_load(struct ahc_softc * ahc,bus_dma_tag_t dmat,bus_dmamap_t map,void * buf,bus_size_t buflen,bus_dmamap_callback_t * cb,void * cb_arg,int flags)869 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
870 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
871 void *cb_arg, int flags)
872 {
873 /*
874 * Assume for now that this will only be used during
875 * initialization and not for per-transaction buffer mapping.
876 */
877 bus_dma_segment_t stack_sg;
878
879 stack_sg.ds_addr = map;
880 stack_sg.ds_len = dmat->maxsize;
881 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
882 return (0);
883 }
884
885 void
ahc_dmamap_destroy(struct ahc_softc * ahc,bus_dma_tag_t dmat,bus_dmamap_t map)886 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
887 {
888 }
889
890 int
ahc_dmamap_unload(struct ahc_softc * ahc,bus_dma_tag_t dmat,bus_dmamap_t map)891 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
892 {
893 /* Nothing to do */
894 return (0);
895 }
896
897 static void
ahc_linux_setup_tag_info_global(char * p)898 ahc_linux_setup_tag_info_global(char *p)
899 {
900 int tags, i, j;
901
902 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
903 printk("Setting Global Tags= %d\n", tags);
904
905 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
906 for (j = 0; j < AHC_NUM_TARGETS; j++) {
907 aic7xxx_tag_info[i].tag_commands[j] = tags;
908 }
909 }
910 }
911
912 static void
ahc_linux_setup_tag_info(u_long arg,int instance,int targ,int32_t value)913 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
914 {
915
916 if ((instance >= 0) && (targ >= 0)
917 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
918 && (targ < AHC_NUM_TARGETS)) {
919 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
920 if (bootverbose)
921 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
922 }
923 }
924
925 static char *
ahc_parse_brace_option(char * opt_name,char * opt_arg,char * end,int depth,void (* callback)(u_long,int,int,int32_t),u_long callback_arg)926 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
927 void (*callback)(u_long, int, int, int32_t),
928 u_long callback_arg)
929 {
930 char *tok_end;
931 char *tok_end2;
932 int i;
933 int instance;
934 int targ;
935 int done;
936 char tok_list[] = {'.', ',', '{', '}', '\0'};
937
938 /* All options use a ':' name/arg separator */
939 if (*opt_arg != ':')
940 return (opt_arg);
941 opt_arg++;
942 instance = -1;
943 targ = -1;
944 done = FALSE;
945 /*
946 * Restore separator that may be in
947 * the middle of our option argument.
948 */
949 tok_end = strchr(opt_arg, '\0');
950 if (tok_end < end)
951 *tok_end = ',';
952 while (!done) {
953 switch (*opt_arg) {
954 case '{':
955 if (instance == -1) {
956 instance = 0;
957 } else {
958 if (depth > 1) {
959 if (targ == -1)
960 targ = 0;
961 } else {
962 printk("Malformed Option %s\n",
963 opt_name);
964 done = TRUE;
965 }
966 }
967 opt_arg++;
968 break;
969 case '}':
970 if (targ != -1)
971 targ = -1;
972 else if (instance != -1)
973 instance = -1;
974 opt_arg++;
975 break;
976 case ',':
977 case '.':
978 if (instance == -1)
979 done = TRUE;
980 else if (targ >= 0)
981 targ++;
982 else if (instance >= 0)
983 instance++;
984 opt_arg++;
985 break;
986 case '\0':
987 done = TRUE;
988 break;
989 default:
990 tok_end = end;
991 for (i = 0; tok_list[i]; i++) {
992 tok_end2 = strchr(opt_arg, tok_list[i]);
993 if ((tok_end2) && (tok_end2 < tok_end))
994 tok_end = tok_end2;
995 }
996 callback(callback_arg, instance, targ,
997 simple_strtol(opt_arg, NULL, 0));
998 opt_arg = tok_end;
999 break;
1000 }
1001 }
1002 return (opt_arg);
1003 }
1004
1005 /*
1006 * Handle Linux boot parameters. This routine allows for assigning a value
1007 * to a parameter with a ':' between the parameter and the value.
1008 * ie. aic7xxx=stpwlev:1,extended
1009 */
1010 static int
aic7xxx_setup(char * s)1011 aic7xxx_setup(char *s)
1012 {
1013 int i, n;
1014 char *p;
1015 char *end;
1016
1017 static const struct {
1018 const char *name;
1019 uint32_t *flag;
1020 } options[] = {
1021 { "extended", &aic7xxx_extended },
1022 { "no_reset", &aic7xxx_no_reset },
1023 { "verbose", &aic7xxx_verbose },
1024 { "allow_memio", &aic7xxx_allow_memio},
1025 #ifdef AHC_DEBUG
1026 { "debug", &ahc_debug },
1027 #endif
1028 { "periodic_otag", &aic7xxx_periodic_otag },
1029 { "pci_parity", &aic7xxx_pci_parity },
1030 { "seltime", &aic7xxx_seltime },
1031 { "tag_info", NULL },
1032 { "global_tag_depth", NULL },
1033 { "dv", NULL }
1034 };
1035
1036 end = strchr(s, '\0');
1037
1038 /*
1039 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1040 * will never be 0 in this case.
1041 */
1042 n = 0;
1043
1044 while ((p = strsep(&s, ",.")) != NULL) {
1045 if (*p == '\0')
1046 continue;
1047 for (i = 0; i < ARRAY_SIZE(options); i++) {
1048
1049 n = strlen(options[i].name);
1050 if (strncmp(options[i].name, p, n) == 0)
1051 break;
1052 }
1053 if (i == ARRAY_SIZE(options))
1054 continue;
1055
1056 if (strncmp(p, "global_tag_depth", n) == 0) {
1057 ahc_linux_setup_tag_info_global(p + n);
1058 } else if (strncmp(p, "tag_info", n) == 0) {
1059 s = ahc_parse_brace_option("tag_info", p + n, end,
1060 2, ahc_linux_setup_tag_info, 0);
1061 } else if (p[n] == ':') {
1062 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1063 } else if (strncmp(p, "verbose", n) == 0) {
1064 *(options[i].flag) = 1;
1065 } else {
1066 *(options[i].flag) ^= 0xFFFFFFFF;
1067 }
1068 }
1069 return 1;
1070 }
1071
1072 __setup("aic7xxx=", aic7xxx_setup);
1073
1074 uint32_t aic7xxx_verbose;
1075
1076 int
ahc_linux_register_host(struct ahc_softc * ahc,struct scsi_host_template * template)1077 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1078 {
1079 char buf[80];
1080 struct Scsi_Host *host;
1081 char *new_name;
1082 u_long s;
1083 int retval;
1084
1085 template->name = ahc->description;
1086 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1087 if (host == NULL)
1088 return -ENOMEM;
1089
1090 *((struct ahc_softc **)host->hostdata) = ahc;
1091 ahc->platform_data->host = host;
1092 host->can_queue = AHC_MAX_QUEUE;
1093 host->cmd_per_lun = 2;
1094 /* XXX No way to communicate the ID for multiple channels */
1095 host->this_id = ahc->our_id;
1096 host->irq = ahc->platform_data->irq;
1097 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1098 host->max_lun = AHC_NUM_LUNS;
1099 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1100 host->sg_tablesize = AHC_NSEG;
1101 ahc_lock(ahc, &s);
1102 ahc_set_unit(ahc, ahc_linux_unit++);
1103 ahc_unlock(ahc, &s);
1104 sprintf(buf, "scsi%d", host->host_no);
1105 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1106 if (new_name != NULL) {
1107 strcpy(new_name, buf);
1108 ahc_set_name(ahc, new_name);
1109 }
1110 host->unique_id = ahc->unit;
1111 ahc_linux_initialize_scsi_bus(ahc);
1112 ahc_intr_enable(ahc, TRUE);
1113
1114 host->transportt = ahc_linux_transport_template;
1115
1116 retval = scsi_add_host(host, ahc->dev);
1117 if (retval) {
1118 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1119 scsi_host_put(host);
1120 return retval;
1121 }
1122
1123 scsi_scan_host(host);
1124 return 0;
1125 }
1126
1127 /*
1128 * Place the SCSI bus into a known state by either resetting it,
1129 * or forcing transfer negotiations on the next command to any
1130 * target.
1131 */
1132 static void
ahc_linux_initialize_scsi_bus(struct ahc_softc * ahc)1133 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1134 {
1135 int i;
1136 int numtarg;
1137 unsigned long s;
1138
1139 i = 0;
1140 numtarg = 0;
1141
1142 ahc_lock(ahc, &s);
1143
1144 if (aic7xxx_no_reset != 0)
1145 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1146
1147 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1148 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1149 else
1150 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1151
1152 if ((ahc->features & AHC_TWIN) != 0) {
1153
1154 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1155 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1156 } else {
1157 if (numtarg == 0)
1158 i = 8;
1159 numtarg += 8;
1160 }
1161 }
1162
1163 /*
1164 * Force negotiation to async for all targets that
1165 * will not see an initial bus reset.
1166 */
1167 for (; i < numtarg; i++) {
1168 struct ahc_devinfo devinfo;
1169 struct ahc_initiator_tinfo *tinfo;
1170 struct ahc_tmode_tstate *tstate;
1171 u_int our_id;
1172 u_int target_id;
1173 char channel;
1174
1175 channel = 'A';
1176 our_id = ahc->our_id;
1177 target_id = i;
1178 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1179 channel = 'B';
1180 our_id = ahc->our_id_b;
1181 target_id = i % 8;
1182 }
1183 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1184 target_id, &tstate);
1185 ahc_compile_devinfo(&devinfo, our_id, target_id,
1186 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1187 ahc_update_neg_request(ahc, &devinfo, tstate,
1188 tinfo, AHC_NEG_ALWAYS);
1189 }
1190 ahc_unlock(ahc, &s);
1191 /* Give the bus some time to recover */
1192 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1193 ahc_linux_freeze_simq(ahc);
1194 msleep(AIC7XXX_RESET_DELAY);
1195 ahc_linux_release_simq(ahc);
1196 }
1197 }
1198
1199 int
ahc_platform_alloc(struct ahc_softc * ahc,void * platform_arg)1200 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1201 {
1202
1203 ahc->platform_data =
1204 kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
1205 if (ahc->platform_data == NULL)
1206 return (ENOMEM);
1207 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1208 ahc_lockinit(ahc);
1209 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1210 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1211 if (aic7xxx_pci_parity == 0)
1212 ahc->flags |= AHC_DISABLE_PCI_PERR;
1213
1214 return (0);
1215 }
1216
1217 void
ahc_platform_free(struct ahc_softc * ahc)1218 ahc_platform_free(struct ahc_softc *ahc)
1219 {
1220 struct scsi_target *starget;
1221 int i;
1222
1223 if (ahc->platform_data != NULL) {
1224 /* destroy all of the device and target objects */
1225 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1226 starget = ahc->platform_data->starget[i];
1227 if (starget != NULL) {
1228 ahc->platform_data->starget[i] = NULL;
1229 }
1230 }
1231
1232 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1233 free_irq(ahc->platform_data->irq, ahc);
1234 if (ahc->tag == BUS_SPACE_PIO
1235 && ahc->bsh.ioport != 0)
1236 release_region(ahc->bsh.ioport, 256);
1237 if (ahc->tag == BUS_SPACE_MEMIO
1238 && ahc->bsh.maddr != NULL) {
1239 iounmap(ahc->bsh.maddr);
1240 release_mem_region(ahc->platform_data->mem_busaddr,
1241 0x1000);
1242 }
1243
1244 if (ahc->platform_data->host)
1245 scsi_host_put(ahc->platform_data->host);
1246
1247 kfree(ahc->platform_data);
1248 }
1249 }
1250
1251 void
ahc_platform_freeze_devq(struct ahc_softc * ahc,struct scb * scb)1252 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1253 {
1254 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1255 SCB_GET_CHANNEL(ahc, scb),
1256 SCB_GET_LUN(scb), SCB_LIST_NULL,
1257 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1258 }
1259
1260 void
ahc_platform_set_tags(struct ahc_softc * ahc,struct scsi_device * sdev,struct ahc_devinfo * devinfo,ahc_queue_alg alg)1261 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1262 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1263 {
1264 struct ahc_linux_device *dev;
1265 int was_queuing;
1266 int now_queuing;
1267
1268 if (sdev == NULL)
1269 return;
1270 dev = scsi_transport_device_data(sdev);
1271
1272 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1273 switch (alg) {
1274 default:
1275 case AHC_QUEUE_NONE:
1276 now_queuing = 0;
1277 break;
1278 case AHC_QUEUE_BASIC:
1279 now_queuing = AHC_DEV_Q_BASIC;
1280 break;
1281 case AHC_QUEUE_TAGGED:
1282 now_queuing = AHC_DEV_Q_TAGGED;
1283 break;
1284 }
1285 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1286 && (was_queuing != now_queuing)
1287 && (dev->active != 0)) {
1288 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1289 dev->qfrozen++;
1290 }
1291
1292 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1293 if (now_queuing) {
1294 u_int usertags;
1295
1296 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1297 if (!was_queuing) {
1298 /*
1299 * Start out aggressively and allow our
1300 * dynamic queue depth algorithm to take
1301 * care of the rest.
1302 */
1303 dev->maxtags = usertags;
1304 dev->openings = dev->maxtags - dev->active;
1305 }
1306 if (dev->maxtags == 0) {
1307 /*
1308 * Queueing is disabled by the user.
1309 */
1310 dev->openings = 1;
1311 } else if (alg == AHC_QUEUE_TAGGED) {
1312 dev->flags |= AHC_DEV_Q_TAGGED;
1313 if (aic7xxx_periodic_otag != 0)
1314 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1315 } else
1316 dev->flags |= AHC_DEV_Q_BASIC;
1317 } else {
1318 /* We can only have one opening. */
1319 dev->maxtags = 0;
1320 dev->openings = 1 - dev->active;
1321 }
1322 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1323 case AHC_DEV_Q_BASIC:
1324 case AHC_DEV_Q_TAGGED:
1325 scsi_change_queue_depth(sdev,
1326 dev->openings + dev->active);
1327 break;
1328 default:
1329 /*
1330 * We allow the OS to queue 2 untagged transactions to
1331 * us at any time even though we can only execute them
1332 * serially on the controller/device. This should
1333 * remove some latency.
1334 */
1335 scsi_change_queue_depth(sdev, 2);
1336 break;
1337 }
1338 }
1339
1340 int
ahc_platform_abort_scbs(struct ahc_softc * ahc,int target,char channel,int lun,u_int tag,role_t role,uint32_t status)1341 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1342 int lun, u_int tag, role_t role, uint32_t status)
1343 {
1344 return 0;
1345 }
1346
1347 static u_int
ahc_linux_user_tagdepth(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)1348 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1349 {
1350 static int warned_user;
1351 u_int tags;
1352
1353 tags = 0;
1354 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1355 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
1356 if (warned_user == 0) {
1357
1358 printk(KERN_WARNING
1359 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1360 "aic7xxx: for installed controllers. Using defaults\n"
1361 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1362 "aic7xxx: the aic7xxx_osm..c source file.\n");
1363 warned_user++;
1364 }
1365 tags = AHC_MAX_QUEUE;
1366 } else {
1367 adapter_tag_info_t *tag_info;
1368
1369 tag_info = &aic7xxx_tag_info[ahc->unit];
1370 tags = tag_info->tag_commands[devinfo->target_offset];
1371 if (tags > AHC_MAX_QUEUE)
1372 tags = AHC_MAX_QUEUE;
1373 }
1374 }
1375 return (tags);
1376 }
1377
1378 /*
1379 * Determines the queue depth for a given device.
1380 */
1381 static void
ahc_linux_device_queue_depth(struct scsi_device * sdev)1382 ahc_linux_device_queue_depth(struct scsi_device *sdev)
1383 {
1384 struct ahc_devinfo devinfo;
1385 u_int tags;
1386 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1387
1388 ahc_compile_devinfo(&devinfo,
1389 sdev->sdev_target->channel == 0
1390 ? ahc->our_id : ahc->our_id_b,
1391 sdev->sdev_target->id, sdev->lun,
1392 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1393 ROLE_INITIATOR);
1394 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1395 if (tags != 0 && sdev->tagged_supported != 0) {
1396
1397 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1398 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1399 devinfo.lun, AC_TRANSFER_NEG);
1400 ahc_print_devinfo(ahc, &devinfo);
1401 printk("Tagged Queuing enabled. Depth %d\n", tags);
1402 } else {
1403 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1404 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1405 devinfo.lun, AC_TRANSFER_NEG);
1406 }
1407 }
1408
1409 static int
ahc_linux_run_command(struct ahc_softc * ahc,struct ahc_linux_device * dev,struct scsi_cmnd * cmd)1410 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1411 struct scsi_cmnd *cmd)
1412 {
1413 struct scb *scb;
1414 struct hardware_scb *hscb;
1415 struct ahc_initiator_tinfo *tinfo;
1416 struct ahc_tmode_tstate *tstate;
1417 uint16_t mask;
1418 struct scb_tailq *untagged_q = NULL;
1419 int nseg;
1420
1421 /*
1422 * Schedule us to run later. The only reason we are not
1423 * running is because the whole controller Q is frozen.
1424 */
1425 if (ahc->platform_data->qfrozen != 0)
1426 return SCSI_MLQUEUE_HOST_BUSY;
1427
1428 /*
1429 * We only allow one untagged transaction
1430 * per target in the initiator role unless
1431 * we are storing a full busy target *lun*
1432 * table in SCB space.
1433 */
1434 if (!(cmd->flags & SCMD_TAGGED)
1435 && (ahc->features & AHC_SCB_BTT) == 0) {
1436 int target_offset;
1437
1438 target_offset = cmd->device->id + cmd->device->channel * 8;
1439 untagged_q = &(ahc->untagged_queues[target_offset]);
1440 if (!TAILQ_EMPTY(untagged_q))
1441 /* if we're already executing an untagged command
1442 * we're busy to another */
1443 return SCSI_MLQUEUE_DEVICE_BUSY;
1444 }
1445
1446 nseg = scsi_dma_map(cmd);
1447 if (nseg < 0)
1448 return SCSI_MLQUEUE_HOST_BUSY;
1449
1450 /*
1451 * Get an scb to use.
1452 */
1453 scb = ahc_get_scb(ahc);
1454 if (!scb) {
1455 scsi_dma_unmap(cmd);
1456 return SCSI_MLQUEUE_HOST_BUSY;
1457 }
1458
1459 scb->io_ctx = cmd;
1460 scb->platform_data->dev = dev;
1461 hscb = scb->hscb;
1462 cmd->host_scribble = (char *)scb;
1463
1464 /*
1465 * Fill out basics of the HSCB.
1466 */
1467 hscb->control = 0;
1468 hscb->scsiid = ahc_build_scsiid(ahc, cmd->device);
1469 hscb->lun = cmd->device->lun;
1470 mask = SCB_GET_TARGET_MASK(ahc, scb);
1471 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1472 SCB_GET_OUR_ID(scb),
1473 SCB_GET_TARGET(ahc, scb), &tstate);
1474 hscb->scsirate = tinfo->scsirate;
1475 hscb->scsioffset = tinfo->curr.offset;
1476 if ((tstate->ultraenb & mask) != 0)
1477 hscb->control |= ULTRAENB;
1478
1479 if ((ahc->user_discenable & mask) != 0)
1480 hscb->control |= DISCENB;
1481
1482 if ((tstate->auto_negotiate & mask) != 0) {
1483 scb->flags |= SCB_AUTO_NEGOTIATE;
1484 scb->hscb->control |= MK_MESSAGE;
1485 }
1486
1487 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1488 if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1489 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1490 hscb->control |= ORDERED_QUEUE_TAG;
1491 dev->commands_since_idle_or_otag = 0;
1492 } else {
1493 hscb->control |= SIMPLE_QUEUE_TAG;
1494 }
1495 }
1496
1497 hscb->cdb_len = cmd->cmd_len;
1498 if (hscb->cdb_len <= 12) {
1499 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1500 } else {
1501 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1502 scb->flags |= SCB_CDB32_PTR;
1503 }
1504
1505 scb->platform_data->xfer_len = 0;
1506 ahc_set_residual(scb, 0);
1507 ahc_set_sense_residual(scb, 0);
1508 scb->sg_count = 0;
1509
1510 if (nseg > 0) {
1511 struct ahc_dma_seg *sg;
1512 struct scatterlist *cur_seg;
1513 int i;
1514
1515 /* Copy the segments into the SG list. */
1516 sg = scb->sg_list;
1517 /*
1518 * The sg_count may be larger than nseg if
1519 * a transfer crosses a 32bit page.
1520 */
1521 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1522 dma_addr_t addr;
1523 bus_size_t len;
1524 int consumed;
1525
1526 addr = sg_dma_address(cur_seg);
1527 len = sg_dma_len(cur_seg);
1528 consumed = ahc_linux_map_seg(ahc, scb,
1529 sg, addr, len);
1530 sg += consumed;
1531 scb->sg_count += consumed;
1532 }
1533 sg--;
1534 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1535
1536 /*
1537 * Reset the sg list pointer.
1538 */
1539 scb->hscb->sgptr =
1540 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1541
1542 /*
1543 * Copy the first SG into the "current"
1544 * data pointer area.
1545 */
1546 scb->hscb->dataptr = scb->sg_list->addr;
1547 scb->hscb->datacnt = scb->sg_list->len;
1548 } else {
1549 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1550 scb->hscb->dataptr = 0;
1551 scb->hscb->datacnt = 0;
1552 scb->sg_count = 0;
1553 }
1554
1555 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1556 dev->openings--;
1557 dev->active++;
1558 dev->commands_issued++;
1559 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1560 dev->commands_since_idle_or_otag++;
1561
1562 scb->flags |= SCB_ACTIVE;
1563 if (untagged_q) {
1564 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1565 scb->flags |= SCB_UNTAGGEDQ;
1566 }
1567 ahc_queue_scb(ahc, scb);
1568 return 0;
1569 }
1570
1571 /*
1572 * SCSI controller interrupt handler.
1573 */
1574 irqreturn_t
ahc_linux_isr(int irq,void * dev_id)1575 ahc_linux_isr(int irq, void *dev_id)
1576 {
1577 struct ahc_softc *ahc;
1578 u_long flags;
1579 int ours;
1580
1581 ahc = (struct ahc_softc *) dev_id;
1582 ahc_lock(ahc, &flags);
1583 ours = ahc_intr(ahc);
1584 ahc_unlock(ahc, &flags);
1585 return IRQ_RETVAL(ours);
1586 }
1587
1588 void
ahc_platform_flushwork(struct ahc_softc * ahc)1589 ahc_platform_flushwork(struct ahc_softc *ahc)
1590 {
1591
1592 }
1593
1594 void
ahc_send_async(struct ahc_softc * ahc,char channel,u_int target,u_int lun,ac_code code)1595 ahc_send_async(struct ahc_softc *ahc, char channel,
1596 u_int target, u_int lun, ac_code code)
1597 {
1598 switch (code) {
1599 case AC_TRANSFER_NEG:
1600 {
1601 struct scsi_target *starget;
1602 struct ahc_initiator_tinfo *tinfo;
1603 struct ahc_tmode_tstate *tstate;
1604 int target_offset;
1605 unsigned int target_ppr_options;
1606
1607 BUG_ON(target == CAM_TARGET_WILDCARD);
1608
1609 tinfo = ahc_fetch_transinfo(ahc, channel,
1610 channel == 'A' ? ahc->our_id
1611 : ahc->our_id_b,
1612 target, &tstate);
1613
1614 /*
1615 * Don't bother reporting results while
1616 * negotiations are still pending.
1617 */
1618 if (tinfo->curr.period != tinfo->goal.period
1619 || tinfo->curr.width != tinfo->goal.width
1620 || tinfo->curr.offset != tinfo->goal.offset
1621 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1622 if (bootverbose == 0)
1623 break;
1624
1625 /*
1626 * Don't bother reporting results that
1627 * are identical to those last reported.
1628 */
1629 target_offset = target;
1630 if (channel == 'B')
1631 target_offset += 8;
1632 starget = ahc->platform_data->starget[target_offset];
1633 if (starget == NULL)
1634 break;
1635
1636 target_ppr_options =
1637 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1638 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1639 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1640
1641 if (tinfo->curr.period == spi_period(starget)
1642 && tinfo->curr.width == spi_width(starget)
1643 && tinfo->curr.offset == spi_offset(starget)
1644 && tinfo->curr.ppr_options == target_ppr_options)
1645 if (bootverbose == 0)
1646 break;
1647
1648 spi_period(starget) = tinfo->curr.period;
1649 spi_width(starget) = tinfo->curr.width;
1650 spi_offset(starget) = tinfo->curr.offset;
1651 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1652 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1653 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1654 spi_display_xfer_agreement(starget);
1655 break;
1656 }
1657 case AC_SENT_BDR:
1658 {
1659 WARN_ON(lun != CAM_LUN_WILDCARD);
1660 scsi_report_device_reset(ahc->platform_data->host,
1661 channel - 'A', target);
1662 break;
1663 }
1664 case AC_BUS_RESET:
1665 if (ahc->platform_data->host != NULL) {
1666 scsi_report_bus_reset(ahc->platform_data->host,
1667 channel - 'A');
1668 }
1669 break;
1670 default:
1671 panic("ahc_send_async: Unexpected async event");
1672 }
1673 }
1674
1675 /*
1676 * Calls the higher level scsi done function and frees the scb.
1677 */
1678 void
ahc_done(struct ahc_softc * ahc,struct scb * scb)1679 ahc_done(struct ahc_softc *ahc, struct scb *scb)
1680 {
1681 struct scsi_cmnd *cmd;
1682 struct ahc_linux_device *dev;
1683
1684 LIST_REMOVE(scb, pending_links);
1685 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1686 struct scb_tailq *untagged_q;
1687 int target_offset;
1688
1689 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1690 untagged_q = &(ahc->untagged_queues[target_offset]);
1691 TAILQ_REMOVE(untagged_q, scb, links.tqe);
1692 BUG_ON(!TAILQ_EMPTY(untagged_q));
1693 } else if ((scb->flags & SCB_ACTIVE) == 0) {
1694 /*
1695 * Transactions aborted from the untagged queue may
1696 * not have been dispatched to the controller, so
1697 * only check the SCB_ACTIVE flag for tagged transactions.
1698 */
1699 printk("SCB %d done'd twice\n", scb->hscb->tag);
1700 ahc_dump_card_state(ahc);
1701 panic("Stopping for safety");
1702 }
1703 cmd = scb->io_ctx;
1704 dev = scb->platform_data->dev;
1705 dev->active--;
1706 dev->openings++;
1707 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1708 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1709 dev->qfrozen--;
1710 }
1711 ahc_linux_unmap_scb(ahc, scb);
1712
1713 /*
1714 * Guard against stale sense data.
1715 * The Linux mid-layer assumes that sense
1716 * was retrieved anytime the first byte of
1717 * the sense buffer looks "sane".
1718 */
1719 cmd->sense_buffer[0] = 0;
1720 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1721 #ifdef AHC_REPORT_UNDERFLOWS
1722 uint32_t amount_xferred;
1723
1724 amount_xferred =
1725 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1726 #endif
1727 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1728 #ifdef AHC_DEBUG
1729 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1730 ahc_print_path(ahc, scb);
1731 printk("Set CAM_UNCOR_PARITY\n");
1732 }
1733 #endif
1734 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1735 #ifdef AHC_REPORT_UNDERFLOWS
1736 /*
1737 * This code is disabled by default as some
1738 * clients of the SCSI system do not properly
1739 * initialize the underflow parameter. This
1740 * results in spurious termination of commands
1741 * that complete as expected (e.g. underflow is
1742 * allowed as command can return variable amounts
1743 * of data.
1744 */
1745 } else if (amount_xferred < scb->io_ctx->underflow) {
1746 u_int i;
1747
1748 ahc_print_path(ahc, scb);
1749 printk("CDB:");
1750 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1751 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1752 printk("\n");
1753 ahc_print_path(ahc, scb);
1754 printk("Saw underflow (%ld of %ld bytes). "
1755 "Treated as error\n",
1756 ahc_get_residual(scb),
1757 ahc_get_transfer_length(scb));
1758 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1759 #endif
1760 } else {
1761 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1762 }
1763 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1764 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1765 }
1766
1767 if (dev->openings == 1
1768 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1769 && ahc_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL)
1770 dev->tag_success_count++;
1771 /*
1772 * Some devices deal with temporary internal resource
1773 * shortages by returning queue full. When the queue
1774 * full occurrs, we throttle back. Slowly try to get
1775 * back to our previous queue depth.
1776 */
1777 if ((dev->openings + dev->active) < dev->maxtags
1778 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1779 dev->tag_success_count = 0;
1780 dev->openings++;
1781 }
1782
1783 if (dev->active == 0)
1784 dev->commands_since_idle_or_otag = 0;
1785
1786 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1787 printk("Recovery SCB completes\n");
1788 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1789 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1790 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1791
1792 if (ahc->platform_data->eh_done)
1793 complete(ahc->platform_data->eh_done);
1794 }
1795
1796 ahc_free_scb(ahc, scb);
1797 ahc_linux_queue_cmd_complete(ahc, cmd);
1798 }
1799
1800 static void
ahc_linux_handle_scsi_status(struct ahc_softc * ahc,struct scsi_device * sdev,struct scb * scb)1801 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
1802 struct scsi_device *sdev, struct scb *scb)
1803 {
1804 struct ahc_devinfo devinfo;
1805 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1806
1807 ahc_compile_devinfo(&devinfo,
1808 ahc->our_id,
1809 sdev->sdev_target->id, sdev->lun,
1810 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1811 ROLE_INITIATOR);
1812
1813 /*
1814 * We don't currently trust the mid-layer to
1815 * properly deal with queue full or busy. So,
1816 * when one occurs, we tell the mid-layer to
1817 * unconditionally requeue the command to us
1818 * so that we can retry it ourselves. We also
1819 * implement our own throttling mechanism so
1820 * we don't clobber the device with too many
1821 * commands.
1822 */
1823 switch (ahc_get_scsi_status(scb)) {
1824 default:
1825 break;
1826 case SAM_STAT_CHECK_CONDITION:
1827 case SAM_STAT_COMMAND_TERMINATED:
1828 {
1829 struct scsi_cmnd *cmd;
1830
1831 /*
1832 * Copy sense information to the OS's cmd
1833 * structure if it is available.
1834 */
1835 cmd = scb->io_ctx;
1836 if (scb->flags & SCB_SENSE) {
1837 u_int sense_size;
1838
1839 sense_size = min(sizeof(struct scsi_sense_data)
1840 - ahc_get_sense_residual(scb),
1841 (u_long)SCSI_SENSE_BUFFERSIZE);
1842 memcpy(cmd->sense_buffer,
1843 ahc_get_sense_buf(ahc, scb), sense_size);
1844 if (sense_size < SCSI_SENSE_BUFFERSIZE)
1845 memset(&cmd->sense_buffer[sense_size], 0,
1846 SCSI_SENSE_BUFFERSIZE - sense_size);
1847 #ifdef AHC_DEBUG
1848 if (ahc_debug & AHC_SHOW_SENSE) {
1849 int i;
1850
1851 printk("Copied %d bytes of sense data:",
1852 sense_size);
1853 for (i = 0; i < sense_size; i++) {
1854 if ((i & 0xF) == 0)
1855 printk("\n");
1856 printk("0x%x ", cmd->sense_buffer[i]);
1857 }
1858 printk("\n");
1859 }
1860 #endif
1861 }
1862 break;
1863 }
1864 case SAM_STAT_TASK_SET_FULL:
1865 {
1866 /*
1867 * By the time the core driver has returned this
1868 * command, all other commands that were queued
1869 * to us but not the device have been returned.
1870 * This ensures that dev->active is equal to
1871 * the number of commands actually queued to
1872 * the device.
1873 */
1874 dev->tag_success_count = 0;
1875 if (dev->active != 0) {
1876 /*
1877 * Drop our opening count to the number
1878 * of commands currently outstanding.
1879 */
1880 dev->openings = 0;
1881 /*
1882 ahc_print_path(ahc, scb);
1883 printk("Dropping tag count to %d\n", dev->active);
1884 */
1885 if (dev->active == dev->tags_on_last_queuefull) {
1886
1887 dev->last_queuefull_same_count++;
1888 /*
1889 * If we repeatedly see a queue full
1890 * at the same queue depth, this
1891 * device has a fixed number of tag
1892 * slots. Lock in this tag depth
1893 * so we stop seeing queue fulls from
1894 * this device.
1895 */
1896 if (dev->last_queuefull_same_count
1897 == AHC_LOCK_TAGS_COUNT) {
1898 dev->maxtags = dev->active;
1899 ahc_print_path(ahc, scb);
1900 printk("Locking max tag count at %d\n",
1901 dev->active);
1902 }
1903 } else {
1904 dev->tags_on_last_queuefull = dev->active;
1905 dev->last_queuefull_same_count = 0;
1906 }
1907 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1908 ahc_set_scsi_status(scb, SAM_STAT_GOOD);
1909 ahc_platform_set_tags(ahc, sdev, &devinfo,
1910 (dev->flags & AHC_DEV_Q_BASIC)
1911 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1912 break;
1913 }
1914 /*
1915 * Drop down to a single opening, and treat this
1916 * as if the target returned BUSY SCSI status.
1917 */
1918 dev->openings = 1;
1919 ahc_set_scsi_status(scb, SAM_STAT_BUSY);
1920 ahc_platform_set_tags(ahc, sdev, &devinfo,
1921 (dev->flags & AHC_DEV_Q_BASIC)
1922 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1923 break;
1924 }
1925 }
1926 }
1927
1928 static void
ahc_linux_queue_cmd_complete(struct ahc_softc * ahc,struct scsi_cmnd * cmd)1929 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1930 {
1931 /*
1932 * Map CAM error codes into Linux Error codes. We
1933 * avoid the conversion so that the DV code has the
1934 * full error information available when making
1935 * state change decisions.
1936 */
1937 {
1938 u_int new_status;
1939
1940 switch (ahc_cmd_get_transaction_status(cmd)) {
1941 case CAM_REQ_INPROG:
1942 case CAM_REQ_CMP:
1943 case CAM_SCSI_STATUS_ERROR:
1944 new_status = DID_OK;
1945 break;
1946 case CAM_REQ_ABORTED:
1947 new_status = DID_ABORT;
1948 break;
1949 case CAM_BUSY:
1950 new_status = DID_BUS_BUSY;
1951 break;
1952 case CAM_REQ_INVALID:
1953 case CAM_PATH_INVALID:
1954 new_status = DID_BAD_TARGET;
1955 break;
1956 case CAM_SEL_TIMEOUT:
1957 new_status = DID_NO_CONNECT;
1958 break;
1959 case CAM_SCSI_BUS_RESET:
1960 case CAM_BDR_SENT:
1961 new_status = DID_RESET;
1962 break;
1963 case CAM_UNCOR_PARITY:
1964 new_status = DID_PARITY;
1965 break;
1966 case CAM_CMD_TIMEOUT:
1967 new_status = DID_TIME_OUT;
1968 break;
1969 case CAM_UA_ABORT:
1970 case CAM_REQ_CMP_ERR:
1971 case CAM_AUTOSENSE_FAIL:
1972 case CAM_NO_HBA:
1973 case CAM_DATA_RUN_ERR:
1974 case CAM_UNEXP_BUSFREE:
1975 case CAM_SEQUENCE_FAIL:
1976 case CAM_CCB_LEN_ERR:
1977 case CAM_PROVIDE_FAIL:
1978 case CAM_REQ_TERMIO:
1979 case CAM_UNREC_HBA_ERROR:
1980 case CAM_REQ_TOO_BIG:
1981 new_status = DID_ERROR;
1982 break;
1983 case CAM_REQUEUE_REQ:
1984 new_status = DID_REQUEUE;
1985 break;
1986 default:
1987 /* We should never get here */
1988 new_status = DID_ERROR;
1989 break;
1990 }
1991
1992 ahc_cmd_set_transaction_status(cmd, new_status);
1993 }
1994
1995 scsi_done(cmd);
1996 }
1997
1998 static void
ahc_linux_freeze_simq(struct ahc_softc * ahc)1999 ahc_linux_freeze_simq(struct ahc_softc *ahc)
2000 {
2001 unsigned long s;
2002
2003 ahc_lock(ahc, &s);
2004 ahc->platform_data->qfrozen++;
2005 if (ahc->platform_data->qfrozen == 1) {
2006 scsi_block_requests(ahc->platform_data->host);
2007
2008 /* XXX What about Twin channels? */
2009 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2010 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2011 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2012 }
2013 ahc_unlock(ahc, &s);
2014 }
2015
2016 static void
ahc_linux_release_simq(struct ahc_softc * ahc)2017 ahc_linux_release_simq(struct ahc_softc *ahc)
2018 {
2019 u_long s;
2020 int unblock_reqs;
2021
2022 unblock_reqs = 0;
2023 ahc_lock(ahc, &s);
2024 if (ahc->platform_data->qfrozen > 0)
2025 ahc->platform_data->qfrozen--;
2026 if (ahc->platform_data->qfrozen == 0)
2027 unblock_reqs = 1;
2028 ahc_unlock(ahc, &s);
2029 /*
2030 * There is still a race here. The mid-layer
2031 * should keep its own freeze count and use
2032 * a bottom half handler to run the queues
2033 * so we can unblock with our own lock held.
2034 */
2035 if (unblock_reqs)
2036 scsi_unblock_requests(ahc->platform_data->host);
2037 }
2038
2039 static int
ahc_linux_queue_recovery_cmd(struct scsi_device * sdev,struct scsi_cmnd * cmd)2040 ahc_linux_queue_recovery_cmd(struct scsi_device *sdev,
2041 struct scsi_cmnd *cmd)
2042 {
2043 struct ahc_softc *ahc;
2044 struct ahc_linux_device *dev;
2045 struct scb *pending_scb = NULL, *scb;
2046 u_int saved_scbptr;
2047 u_int active_scb_index;
2048 u_int last_phase;
2049 u_int saved_scsiid;
2050 u_int cdb_byte;
2051 int retval;
2052 int was_paused;
2053 int paused;
2054 int wait;
2055 int disconnected;
2056 unsigned long flags;
2057
2058 paused = FALSE;
2059 wait = FALSE;
2060 ahc = *(struct ahc_softc **)sdev->host->hostdata;
2061
2062 sdev_printk(KERN_INFO, sdev, "Attempting to queue a%s message\n",
2063 cmd ? "n ABORT" : " TARGET RESET");
2064
2065 if (cmd) {
2066 printk("CDB:");
2067 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2068 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2069 printk("\n");
2070 }
2071
2072 ahc_lock(ahc, &flags);
2073
2074 /*
2075 * First determine if we currently own this command.
2076 * Start by searching the device queue. If not found
2077 * there, check the pending_scb list. If not found
2078 * at all, and the system wanted us to just abort the
2079 * command, return success.
2080 */
2081 dev = scsi_transport_device_data(sdev);
2082
2083 if (dev == NULL) {
2084 /*
2085 * No target device for this command exists,
2086 * so we must not still own the command.
2087 */
2088 printk("%s:%d:%d:%d: Is not an active device\n",
2089 ahc_name(ahc), sdev->channel, sdev->id, (u8)sdev->lun);
2090 retval = SUCCESS;
2091 goto no_cmd;
2092 }
2093
2094 if (cmd && (dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2095 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2096 cmd->device->channel + 'A',
2097 (u8)cmd->device->lun,
2098 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2099 printk("%s:%d:%d:%d: Command found on untagged queue\n",
2100 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2101 (u8)cmd->device->lun);
2102 retval = SUCCESS;
2103 goto done;
2104 }
2105
2106 /*
2107 * See if we can find a matching cmd in the pending list.
2108 */
2109 if (cmd) {
2110 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
2111 if (scb->io_ctx == cmd) {
2112 pending_scb = scb;
2113 break;
2114 }
2115 }
2116 } else {
2117 /* Any SCB for this device will do for a target reset */
2118 LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) {
2119 if (ahc_match_scb(ahc, scb, sdev->id,
2120 sdev->channel + 'A',
2121 CAM_LUN_WILDCARD,
2122 SCB_LIST_NULL, ROLE_INITIATOR)) {
2123 pending_scb = scb;
2124 break;
2125 }
2126 }
2127 }
2128
2129 if (pending_scb == NULL) {
2130 sdev_printk(KERN_INFO, sdev, "Command not found\n");
2131 goto no_cmd;
2132 }
2133
2134 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2135 /*
2136 * We can't queue two recovery actions using the same SCB
2137 */
2138 retval = FAILED;
2139 goto done;
2140 }
2141
2142 /*
2143 * Ensure that the card doesn't do anything
2144 * behind our back and that we didn't "just" miss
2145 * an interrupt that would affect this cmd.
2146 */
2147 was_paused = ahc_is_paused(ahc);
2148 ahc_pause_and_flushwork(ahc);
2149 paused = TRUE;
2150
2151 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2152 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2153 goto no_cmd;
2154 }
2155
2156 printk("%s: At time of recovery, card was %spaused\n",
2157 ahc_name(ahc), was_paused ? "" : "not ");
2158 ahc_dump_card_state(ahc);
2159
2160 disconnected = TRUE;
2161 if (cmd) {
2162 if (ahc_search_qinfifo(ahc, sdev->id,
2163 sdev->channel + 'A',
2164 sdev->lun,
2165 pending_scb->hscb->tag,
2166 ROLE_INITIATOR, CAM_REQ_ABORTED,
2167 SEARCH_COMPLETE) > 0) {
2168 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2169 ahc_name(ahc), sdev->channel,
2170 sdev->id, (u8)sdev->lun);
2171 retval = SUCCESS;
2172 goto done;
2173 }
2174 } else if (ahc_search_qinfifo(ahc, sdev->id,
2175 sdev->channel + 'A',
2176 sdev->lun,
2177 pending_scb->hscb->tag,
2178 ROLE_INITIATOR, /*status*/0,
2179 SEARCH_COUNT) > 0) {
2180 disconnected = FALSE;
2181 }
2182
2183 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2184 struct scb *bus_scb;
2185
2186 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2187 if (bus_scb == pending_scb)
2188 disconnected = FALSE;
2189 else if (!cmd
2190 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2191 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2192 disconnected = FALSE;
2193 }
2194
2195 /*
2196 * At this point, pending_scb is the scb associated with the
2197 * passed in command. That command is currently active on the
2198 * bus, is in the disconnected state, or we're hoping to find
2199 * a command for the same target active on the bus to abuse to
2200 * send a BDR. Queue the appropriate message based on which of
2201 * these states we are in.
2202 */
2203 last_phase = ahc_inb(ahc, LASTPHASE);
2204 saved_scbptr = ahc_inb(ahc, SCBPTR);
2205 active_scb_index = ahc_inb(ahc, SCB_TAG);
2206 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2207 if (last_phase != P_BUSFREE
2208 && (pending_scb->hscb->tag == active_scb_index
2209 || (!cmd && SCSIID_TARGET(ahc, saved_scsiid) == sdev->id))) {
2210
2211 /*
2212 * We're active on the bus, so assert ATN
2213 * and hope that the target responds.
2214 */
2215 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2216 pending_scb->flags |= SCB_RECOVERY_SCB;
2217 pending_scb->flags |= cmd ? SCB_ABORT : SCB_DEVICE_RESET;
2218 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2219 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2220 sdev_printk(KERN_INFO, sdev, "Device is active, asserting ATN\n");
2221 wait = TRUE;
2222 } else if (disconnected) {
2223
2224 /*
2225 * Actually re-queue this SCB in an attempt
2226 * to select the device before it reconnects.
2227 * In either case (selection or reselection),
2228 * we will now issue the approprate message
2229 * to the timed-out device.
2230 *
2231 * Set the MK_MESSAGE control bit indicating
2232 * that we desire to send a message. We
2233 * also set the disconnected flag since
2234 * in the paging case there is no guarantee
2235 * that our SCB control byte matches the
2236 * version on the card. We don't want the
2237 * sequencer to abort the command thinking
2238 * an unsolicited reselection occurred.
2239 */
2240 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2241 pending_scb->flags |= SCB_RECOVERY_SCB;
2242 pending_scb->flags |= cmd ? SCB_ABORT : SCB_DEVICE_RESET;
2243
2244 /*
2245 * Remove any cached copy of this SCB in the
2246 * disconnected list in preparation for the
2247 * queuing of our abort SCB. We use the
2248 * same element in the SCB, SCB_NEXT, for
2249 * both the qinfifo and the disconnected list.
2250 */
2251 ahc_search_disc_list(ahc, sdev->id,
2252 sdev->channel + 'A',
2253 sdev->lun, pending_scb->hscb->tag,
2254 /*stop_on_first*/TRUE,
2255 /*remove*/TRUE,
2256 /*save_state*/FALSE);
2257
2258 /*
2259 * In the non-paging case, the sequencer will
2260 * never re-reference the in-core SCB.
2261 * To make sure we are notified during
2262 * reselection, set the MK_MESSAGE flag in
2263 * the card's copy of the SCB.
2264 */
2265 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2266 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2267 ahc_outb(ahc, SCB_CONTROL,
2268 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2269 }
2270
2271 /*
2272 * Clear out any entries in the QINFIFO first
2273 * so we are the next SCB for this target
2274 * to run.
2275 */
2276 ahc_search_qinfifo(ahc, sdev->id,
2277 sdev->channel + 'A',
2278 (u8)sdev->lun, SCB_LIST_NULL,
2279 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2280 SEARCH_COMPLETE);
2281 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2282 ahc_outb(ahc, SCBPTR, saved_scbptr);
2283 ahc_print_path(ahc, pending_scb);
2284 printk("Device is disconnected, re-queuing SCB\n");
2285 wait = TRUE;
2286 } else {
2287 sdev_printk(KERN_INFO, sdev, "Unable to deliver message\n");
2288 retval = FAILED;
2289 goto done;
2290 }
2291
2292 no_cmd:
2293 /*
2294 * Our assumption is that if we don't have the command, no
2295 * recovery action was required, so we return success. Again,
2296 * the semantics of the mid-layer recovery engine are not
2297 * well defined, so this may change in time.
2298 */
2299 retval = SUCCESS;
2300 done:
2301 if (paused)
2302 ahc_unpause(ahc);
2303 if (wait) {
2304 DECLARE_COMPLETION_ONSTACK(done);
2305
2306 ahc->platform_data->eh_done = &done;
2307 ahc_unlock(ahc, &flags);
2308
2309 printk("Recovery code sleeping\n");
2310 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2311 ahc_lock(ahc, &flags);
2312 ahc->platform_data->eh_done = NULL;
2313 ahc_unlock(ahc, &flags);
2314
2315 printk("Timer Expired\n");
2316 retval = FAILED;
2317 }
2318 printk("Recovery code awake\n");
2319 } else
2320 ahc_unlock(ahc, &flags);
2321 return (retval);
2322 }
2323
ahc_linux_set_width(struct scsi_target * starget,int width)2324 static void ahc_linux_set_width(struct scsi_target *starget, int width)
2325 {
2326 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2327 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2328 struct ahc_devinfo devinfo;
2329 unsigned long flags;
2330
2331 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2332 starget->channel + 'A', ROLE_INITIATOR);
2333 ahc_lock(ahc, &flags);
2334 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2335 ahc_unlock(ahc, &flags);
2336 }
2337
ahc_linux_set_period(struct scsi_target * starget,int period)2338 static void ahc_linux_set_period(struct scsi_target *starget, int period)
2339 {
2340 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2341 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2342 struct ahc_tmode_tstate *tstate;
2343 struct ahc_initiator_tinfo *tinfo
2344 = ahc_fetch_transinfo(ahc,
2345 starget->channel + 'A',
2346 shost->this_id, starget->id, &tstate);
2347 struct ahc_devinfo devinfo;
2348 unsigned int ppr_options = tinfo->goal.ppr_options;
2349 unsigned long flags;
2350 unsigned long offset = tinfo->goal.offset;
2351 const struct ahc_syncrate *syncrate;
2352
2353 if (offset == 0)
2354 offset = MAX_OFFSET;
2355
2356 if (period < 9)
2357 period = 9; /* 12.5ns is our minimum */
2358 if (period == 9) {
2359 if (spi_max_width(starget))
2360 ppr_options |= MSG_EXT_PPR_DT_REQ;
2361 else
2362 /* need wide for DT and need DT for 12.5 ns */
2363 period = 10;
2364 }
2365
2366 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2367 starget->channel + 'A', ROLE_INITIATOR);
2368
2369 /* all PPR requests apart from QAS require wide transfers */
2370 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2371 if (spi_width(starget) == 0)
2372 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2373 }
2374
2375 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
2376 AHC_SYNCRATE_DT);
2377 ahc_lock(ahc, &flags);
2378 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2379 ppr_options, AHC_TRANS_GOAL, FALSE);
2380 ahc_unlock(ahc, &flags);
2381 }
2382
ahc_linux_set_offset(struct scsi_target * starget,int offset)2383 static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2384 {
2385 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2386 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2387 struct ahc_tmode_tstate *tstate;
2388 struct ahc_initiator_tinfo *tinfo
2389 = ahc_fetch_transinfo(ahc,
2390 starget->channel + 'A',
2391 shost->this_id, starget->id, &tstate);
2392 struct ahc_devinfo devinfo;
2393 unsigned int ppr_options = 0;
2394 unsigned int period = 0;
2395 unsigned long flags;
2396 const struct ahc_syncrate *syncrate = NULL;
2397
2398 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2399 starget->channel + 'A', ROLE_INITIATOR);
2400 if (offset != 0) {
2401 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
2402 AHC_SYNCRATE_DT);
2403 period = tinfo->goal.period;
2404 ppr_options = tinfo->goal.ppr_options;
2405 }
2406 ahc_lock(ahc, &flags);
2407 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2408 ppr_options, AHC_TRANS_GOAL, FALSE);
2409 ahc_unlock(ahc, &flags);
2410 }
2411
ahc_linux_set_dt(struct scsi_target * starget,int dt)2412 static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2413 {
2414 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2415 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2416 struct ahc_tmode_tstate *tstate;
2417 struct ahc_initiator_tinfo *tinfo
2418 = ahc_fetch_transinfo(ahc,
2419 starget->channel + 'A',
2420 shost->this_id, starget->id, &tstate);
2421 struct ahc_devinfo devinfo;
2422 unsigned int ppr_options = tinfo->goal.ppr_options
2423 & ~MSG_EXT_PPR_DT_REQ;
2424 unsigned int period = tinfo->goal.period;
2425 unsigned int width = tinfo->goal.width;
2426 unsigned long flags;
2427 const struct ahc_syncrate *syncrate;
2428
2429 if (dt && spi_max_width(starget)) {
2430 ppr_options |= MSG_EXT_PPR_DT_REQ;
2431 if (!width)
2432 ahc_linux_set_width(starget, 1);
2433 } else if (period == 9)
2434 period = 10; /* if resetting DT, period must be >= 25ns */
2435
2436 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2437 starget->channel + 'A', ROLE_INITIATOR);
2438 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
2439 AHC_SYNCRATE_DT);
2440 ahc_lock(ahc, &flags);
2441 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2442 ppr_options, AHC_TRANS_GOAL, FALSE);
2443 ahc_unlock(ahc, &flags);
2444 }
2445
2446 #if 0
2447 /* FIXME: This code claims to support IU and QAS. However, the actual
2448 * sequencer code and aic7xxx_core have no support for these parameters and
2449 * will get into a bad state if they're negotiated. Do not enable this
2450 * unless you know what you're doing */
2451 static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2452 {
2453 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2454 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2455 struct ahc_tmode_tstate *tstate;
2456 struct ahc_initiator_tinfo *tinfo
2457 = ahc_fetch_transinfo(ahc,
2458 starget->channel + 'A',
2459 shost->this_id, starget->id, &tstate);
2460 struct ahc_devinfo devinfo;
2461 unsigned int ppr_options = tinfo->goal.ppr_options
2462 & ~MSG_EXT_PPR_QAS_REQ;
2463 unsigned int period = tinfo->goal.period;
2464 unsigned long flags;
2465 struct ahc_syncrate *syncrate;
2466
2467 if (qas)
2468 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2469
2470 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2471 starget->channel + 'A', ROLE_INITIATOR);
2472 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
2473 AHC_SYNCRATE_DT);
2474 ahc_lock(ahc, &flags);
2475 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2476 ppr_options, AHC_TRANS_GOAL, FALSE);
2477 ahc_unlock(ahc, &flags);
2478 }
2479
2480 static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2481 {
2482 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2483 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2484 struct ahc_tmode_tstate *tstate;
2485 struct ahc_initiator_tinfo *tinfo
2486 = ahc_fetch_transinfo(ahc,
2487 starget->channel + 'A',
2488 shost->this_id, starget->id, &tstate);
2489 struct ahc_devinfo devinfo;
2490 unsigned int ppr_options = tinfo->goal.ppr_options
2491 & ~MSG_EXT_PPR_IU_REQ;
2492 unsigned int period = tinfo->goal.period;
2493 unsigned long flags;
2494 struct ahc_syncrate *syncrate;
2495
2496 if (iu)
2497 ppr_options |= MSG_EXT_PPR_IU_REQ;
2498
2499 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2500 starget->channel + 'A', ROLE_INITIATOR);
2501 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
2502 AHC_SYNCRATE_DT);
2503 ahc_lock(ahc, &flags);
2504 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2505 ppr_options, AHC_TRANS_GOAL, FALSE);
2506 ahc_unlock(ahc, &flags);
2507 }
2508 #endif
2509
ahc_linux_get_signalling(struct Scsi_Host * shost)2510 static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2511 {
2512 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
2513 unsigned long flags;
2514 u8 mode;
2515
2516 if (!(ahc->features & AHC_ULTRA2)) {
2517 /* non-LVD chipset, may not have SBLKCTL reg */
2518 spi_signalling(shost) =
2519 ahc->features & AHC_HVD ?
2520 SPI_SIGNAL_HVD :
2521 SPI_SIGNAL_SE;
2522 return;
2523 }
2524
2525 ahc_lock(ahc, &flags);
2526 ahc_pause(ahc);
2527 mode = ahc_inb(ahc, SBLKCTL);
2528 ahc_unpause(ahc);
2529 ahc_unlock(ahc, &flags);
2530
2531 if (mode & ENAB40)
2532 spi_signalling(shost) = SPI_SIGNAL_LVD;
2533 else if (mode & ENAB20)
2534 spi_signalling(shost) = SPI_SIGNAL_SE;
2535 else
2536 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2537 }
2538
2539 static struct spi_function_template ahc_linux_transport_functions = {
2540 .set_offset = ahc_linux_set_offset,
2541 .show_offset = 1,
2542 .set_period = ahc_linux_set_period,
2543 .show_period = 1,
2544 .set_width = ahc_linux_set_width,
2545 .show_width = 1,
2546 .set_dt = ahc_linux_set_dt,
2547 .show_dt = 1,
2548 #if 0
2549 .set_iu = ahc_linux_set_iu,
2550 .show_iu = 1,
2551 .set_qas = ahc_linux_set_qas,
2552 .show_qas = 1,
2553 #endif
2554 .get_signalling = ahc_linux_get_signalling,
2555 };
2556
2557
2558
2559 static int __init
ahc_linux_init(void)2560 ahc_linux_init(void)
2561 {
2562 /*
2563 * If we've been passed any parameters, process them now.
2564 */
2565 if (aic7xxx)
2566 aic7xxx_setup(aic7xxx);
2567
2568 ahc_linux_transport_template =
2569 spi_attach_transport(&ahc_linux_transport_functions);
2570 if (!ahc_linux_transport_template)
2571 return -ENODEV;
2572
2573 scsi_transport_reserve_device(ahc_linux_transport_template,
2574 sizeof(struct ahc_linux_device));
2575
2576 ahc_linux_pci_init();
2577 ahc_linux_eisa_init();
2578 return 0;
2579 }
2580
2581 static void
ahc_linux_exit(void)2582 ahc_linux_exit(void)
2583 {
2584 ahc_linux_pci_exit();
2585 ahc_linux_eisa_exit();
2586 spi_release_transport(ahc_linux_transport_template);
2587 }
2588
2589 module_init(ahc_linux_init);
2590 module_exit(ahc_linux_exit);
2591