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
126 static 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 */
158 typedef 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.
196 adapter_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 */
226 static 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
252 void
ahc_print_path(struct ahc_softc * ahc,struct scb * scb)253 ahc_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 */
273 static 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 */
280 static 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 */
292 static 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 */
300 uint32_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 */
312 static 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 */
322 static uint32_t aic7xxx_periodic_otag;
323
324 /*
325 * Module information and settable options.
326 */
327 static char *aic7xxx = NULL;
328
329 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
330 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");
331 MODULE_LICENSE("Dual BSD/GPL");
332 MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
333 module_param(aic7xxx, charp, 0444);
334 MODULE_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
361 static void ahc_linux_handle_scsi_status(struct ahc_softc *,
362 struct scsi_device *,
363 struct scb *);
364 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
365 struct scsi_cmnd *cmd);
366 static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
367 static void ahc_linux_release_simq(struct ahc_softc *ahc);
368 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
369 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
370 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
371 struct ahc_devinfo *devinfo);
372 static void ahc_linux_device_queue_depth(struct scsi_device *);
373 static int ahc_linux_run_command(struct ahc_softc*,
374 struct ahc_linux_device *,
375 struct scsi_cmnd *);
376 static void ahc_linux_setup_tag_info_global(char *p);
377 static int aic7xxx_setup(char *s);
378
379 static int ahc_linux_unit;
380
381
382 /************************** OS Utility Wrappers *******************************/
383 void
ahc_delay(long usec)384 ahc_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 **********************************/
398 uint8_t
ahc_inb(struct ahc_softc * ahc,long port)399 ahc_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
412 void
ahc_outb(struct ahc_softc * ahc,long port,uint8_t val)413 ahc_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
423 void
ahc_outsb(struct ahc_softc * ahc,long port,uint8_t * array,int count)424 ahc_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
437 void
ahc_insb(struct ahc_softc * ahc,long port,uint8_t * array,int count)438 ahc_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 ************************************/
452 static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
453
454 static 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
458 static void
ahc_linux_unmap_scb(struct ahc_softc * ahc,struct scb * scb)459 ahc_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
469 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)470 ahc_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 */
494 static const char *
ahc_linux_info(struct Scsi_Host * host)495 ahc_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 */
520 static int
ahc_linux_queue_lck(struct scsi_cmnd * cmd,void (* scsi_done)(struct scsi_cmnd *))521 ahc_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
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, SCB_ABORT);
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, SCB_DEVICE_RESET);
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 /******************************** Macros **************************************/
803 #define BUILD_SCSIID(ahc, cmd) \
804 ((((cmd)->device->id << TID_SHIFT) & TID) \
805 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
806 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
807
808 /******************************** Bus DMA *************************************/
809 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)810 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
811 bus_size_t alignment, bus_size_t boundary,
812 dma_addr_t lowaddr, dma_addr_t highaddr,
813 bus_dma_filter_t *filter, void *filterarg,
814 bus_size_t maxsize, int nsegments,
815 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
816 {
817 bus_dma_tag_t dmat;
818
819 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
820 if (dmat == NULL)
821 return (ENOMEM);
822
823 /*
824 * Linux is very simplistic about DMA memory. For now don't
825 * maintain all specification information. Once Linux supplies
826 * better facilities for doing these operations, or the
827 * needs of this particular driver change, we might need to do
828 * more here.
829 */
830 dmat->alignment = alignment;
831 dmat->boundary = boundary;
832 dmat->maxsize = maxsize;
833 *ret_tag = dmat;
834 return (0);
835 }
836
837 void
ahc_dma_tag_destroy(struct ahc_softc * ahc,bus_dma_tag_t dmat)838 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
839 {
840 kfree(dmat);
841 }
842
843 int
ahc_dmamem_alloc(struct ahc_softc * ahc,bus_dma_tag_t dmat,void ** vaddr,int flags,bus_dmamap_t * mapp)844 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
845 int flags, bus_dmamap_t *mapp)
846 {
847 /* XXX: check if we really need the GFP_ATOMIC and unwind this mess! */
848 *vaddr = dma_alloc_coherent(ahc->dev, dmat->maxsize, mapp, GFP_ATOMIC);
849 if (*vaddr == NULL)
850 return ENOMEM;
851 return 0;
852 }
853
854 void
ahc_dmamem_free(struct ahc_softc * ahc,bus_dma_tag_t dmat,void * vaddr,bus_dmamap_t map)855 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
856 void* vaddr, bus_dmamap_t map)
857 {
858 dma_free_coherent(ahc->dev, dmat->maxsize, vaddr, map);
859 }
860
861 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)862 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
863 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
864 void *cb_arg, int flags)
865 {
866 /*
867 * Assume for now that this will only be used during
868 * initialization and not for per-transaction buffer mapping.
869 */
870 bus_dma_segment_t stack_sg;
871
872 stack_sg.ds_addr = map;
873 stack_sg.ds_len = dmat->maxsize;
874 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
875 return (0);
876 }
877
878 void
ahc_dmamap_destroy(struct ahc_softc * ahc,bus_dma_tag_t dmat,bus_dmamap_t map)879 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
880 {
881 }
882
883 int
ahc_dmamap_unload(struct ahc_softc * ahc,bus_dma_tag_t dmat,bus_dmamap_t map)884 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
885 {
886 /* Nothing to do */
887 return (0);
888 }
889
890 static void
ahc_linux_setup_tag_info_global(char * p)891 ahc_linux_setup_tag_info_global(char *p)
892 {
893 int tags, i, j;
894
895 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
896 printk("Setting Global Tags= %d\n", tags);
897
898 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
899 for (j = 0; j < AHC_NUM_TARGETS; j++) {
900 aic7xxx_tag_info[i].tag_commands[j] = tags;
901 }
902 }
903 }
904
905 static void
ahc_linux_setup_tag_info(u_long arg,int instance,int targ,int32_t value)906 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
907 {
908
909 if ((instance >= 0) && (targ >= 0)
910 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
911 && (targ < AHC_NUM_TARGETS)) {
912 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
913 if (bootverbose)
914 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
915 }
916 }
917
918 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)919 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
920 void (*callback)(u_long, int, int, int32_t),
921 u_long callback_arg)
922 {
923 char *tok_end;
924 char *tok_end2;
925 int i;
926 int instance;
927 int targ;
928 int done;
929 char tok_list[] = {'.', ',', '{', '}', '\0'};
930
931 /* All options use a ':' name/arg separator */
932 if (*opt_arg != ':')
933 return (opt_arg);
934 opt_arg++;
935 instance = -1;
936 targ = -1;
937 done = FALSE;
938 /*
939 * Restore separator that may be in
940 * the middle of our option argument.
941 */
942 tok_end = strchr(opt_arg, '\0');
943 if (tok_end < end)
944 *tok_end = ',';
945 while (!done) {
946 switch (*opt_arg) {
947 case '{':
948 if (instance == -1) {
949 instance = 0;
950 } else {
951 if (depth > 1) {
952 if (targ == -1)
953 targ = 0;
954 } else {
955 printk("Malformed Option %s\n",
956 opt_name);
957 done = TRUE;
958 }
959 }
960 opt_arg++;
961 break;
962 case '}':
963 if (targ != -1)
964 targ = -1;
965 else if (instance != -1)
966 instance = -1;
967 opt_arg++;
968 break;
969 case ',':
970 case '.':
971 if (instance == -1)
972 done = TRUE;
973 else if (targ >= 0)
974 targ++;
975 else if (instance >= 0)
976 instance++;
977 opt_arg++;
978 break;
979 case '\0':
980 done = TRUE;
981 break;
982 default:
983 tok_end = end;
984 for (i = 0; tok_list[i]; i++) {
985 tok_end2 = strchr(opt_arg, tok_list[i]);
986 if ((tok_end2) && (tok_end2 < tok_end))
987 tok_end = tok_end2;
988 }
989 callback(callback_arg, instance, targ,
990 simple_strtol(opt_arg, NULL, 0));
991 opt_arg = tok_end;
992 break;
993 }
994 }
995 return (opt_arg);
996 }
997
998 /*
999 * Handle Linux boot parameters. This routine allows for assigning a value
1000 * to a parameter with a ':' between the parameter and the value.
1001 * ie. aic7xxx=stpwlev:1,extended
1002 */
1003 static int
aic7xxx_setup(char * s)1004 aic7xxx_setup(char *s)
1005 {
1006 int i, n;
1007 char *p;
1008 char *end;
1009
1010 static const struct {
1011 const char *name;
1012 uint32_t *flag;
1013 } options[] = {
1014 { "extended", &aic7xxx_extended },
1015 { "no_reset", &aic7xxx_no_reset },
1016 { "verbose", &aic7xxx_verbose },
1017 { "allow_memio", &aic7xxx_allow_memio},
1018 #ifdef AHC_DEBUG
1019 { "debug", &ahc_debug },
1020 #endif
1021 { "periodic_otag", &aic7xxx_periodic_otag },
1022 { "pci_parity", &aic7xxx_pci_parity },
1023 { "seltime", &aic7xxx_seltime },
1024 { "tag_info", NULL },
1025 { "global_tag_depth", NULL },
1026 { "dv", NULL }
1027 };
1028
1029 end = strchr(s, '\0');
1030
1031 /*
1032 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1033 * will never be 0 in this case.
1034 */
1035 n = 0;
1036
1037 while ((p = strsep(&s, ",.")) != NULL) {
1038 if (*p == '\0')
1039 continue;
1040 for (i = 0; i < ARRAY_SIZE(options); i++) {
1041
1042 n = strlen(options[i].name);
1043 if (strncmp(options[i].name, p, n) == 0)
1044 break;
1045 }
1046 if (i == ARRAY_SIZE(options))
1047 continue;
1048
1049 if (strncmp(p, "global_tag_depth", n) == 0) {
1050 ahc_linux_setup_tag_info_global(p + n);
1051 } else if (strncmp(p, "tag_info", n) == 0) {
1052 s = ahc_parse_brace_option("tag_info", p + n, end,
1053 2, ahc_linux_setup_tag_info, 0);
1054 } else if (p[n] == ':') {
1055 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1056 } else if (strncmp(p, "verbose", n) == 0) {
1057 *(options[i].flag) = 1;
1058 } else {
1059 *(options[i].flag) ^= 0xFFFFFFFF;
1060 }
1061 }
1062 return 1;
1063 }
1064
1065 __setup("aic7xxx=", aic7xxx_setup);
1066
1067 uint32_t aic7xxx_verbose;
1068
1069 int
ahc_linux_register_host(struct ahc_softc * ahc,struct scsi_host_template * template)1070 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1071 {
1072 char buf[80];
1073 struct Scsi_Host *host;
1074 char *new_name;
1075 u_long s;
1076 int retval;
1077
1078 template->name = ahc->description;
1079 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1080 if (host == NULL)
1081 return (ENOMEM);
1082
1083 *((struct ahc_softc **)host->hostdata) = ahc;
1084 ahc->platform_data->host = host;
1085 host->can_queue = AHC_MAX_QUEUE;
1086 host->cmd_per_lun = 2;
1087 /* XXX No way to communicate the ID for multiple channels */
1088 host->this_id = ahc->our_id;
1089 host->irq = ahc->platform_data->irq;
1090 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1091 host->max_lun = AHC_NUM_LUNS;
1092 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1093 host->sg_tablesize = AHC_NSEG;
1094 ahc_lock(ahc, &s);
1095 ahc_set_unit(ahc, ahc_linux_unit++);
1096 ahc_unlock(ahc, &s);
1097 sprintf(buf, "scsi%d", host->host_no);
1098 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1099 if (new_name != NULL) {
1100 strcpy(new_name, buf);
1101 ahc_set_name(ahc, new_name);
1102 }
1103 host->unique_id = ahc->unit;
1104 ahc_linux_initialize_scsi_bus(ahc);
1105 ahc_intr_enable(ahc, TRUE);
1106
1107 host->transportt = ahc_linux_transport_template;
1108
1109 retval = scsi_add_host(host, ahc->dev);
1110 if (retval) {
1111 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1112 scsi_host_put(host);
1113 return retval;
1114 }
1115
1116 scsi_scan_host(host);
1117 return 0;
1118 }
1119
1120 /*
1121 * Place the SCSI bus into a known state by either resetting it,
1122 * or forcing transfer negotiations on the next command to any
1123 * target.
1124 */
1125 static void
ahc_linux_initialize_scsi_bus(struct ahc_softc * ahc)1126 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1127 {
1128 int i;
1129 int numtarg;
1130 unsigned long s;
1131
1132 i = 0;
1133 numtarg = 0;
1134
1135 ahc_lock(ahc, &s);
1136
1137 if (aic7xxx_no_reset != 0)
1138 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1139
1140 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1141 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1142 else
1143 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1144
1145 if ((ahc->features & AHC_TWIN) != 0) {
1146
1147 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1148 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1149 } else {
1150 if (numtarg == 0)
1151 i = 8;
1152 numtarg += 8;
1153 }
1154 }
1155
1156 /*
1157 * Force negotiation to async for all targets that
1158 * will not see an initial bus reset.
1159 */
1160 for (; i < numtarg; i++) {
1161 struct ahc_devinfo devinfo;
1162 struct ahc_initiator_tinfo *tinfo;
1163 struct ahc_tmode_tstate *tstate;
1164 u_int our_id;
1165 u_int target_id;
1166 char channel;
1167
1168 channel = 'A';
1169 our_id = ahc->our_id;
1170 target_id = i;
1171 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1172 channel = 'B';
1173 our_id = ahc->our_id_b;
1174 target_id = i % 8;
1175 }
1176 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1177 target_id, &tstate);
1178 ahc_compile_devinfo(&devinfo, our_id, target_id,
1179 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1180 ahc_update_neg_request(ahc, &devinfo, tstate,
1181 tinfo, AHC_NEG_ALWAYS);
1182 }
1183 ahc_unlock(ahc, &s);
1184 /* Give the bus some time to recover */
1185 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1186 ahc_linux_freeze_simq(ahc);
1187 msleep(AIC7XXX_RESET_DELAY);
1188 ahc_linux_release_simq(ahc);
1189 }
1190 }
1191
1192 int
ahc_platform_alloc(struct ahc_softc * ahc,void * platform_arg)1193 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1194 {
1195
1196 ahc->platform_data =
1197 kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
1198 if (ahc->platform_data == NULL)
1199 return (ENOMEM);
1200 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1201 ahc_lockinit(ahc);
1202 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1203 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1204 if (aic7xxx_pci_parity == 0)
1205 ahc->flags |= AHC_DISABLE_PCI_PERR;
1206
1207 return (0);
1208 }
1209
1210 void
ahc_platform_free(struct ahc_softc * ahc)1211 ahc_platform_free(struct ahc_softc *ahc)
1212 {
1213 struct scsi_target *starget;
1214 int i;
1215
1216 if (ahc->platform_data != NULL) {
1217 /* destroy all of the device and target objects */
1218 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1219 starget = ahc->platform_data->starget[i];
1220 if (starget != NULL) {
1221 ahc->platform_data->starget[i] = NULL;
1222 }
1223 }
1224
1225 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1226 free_irq(ahc->platform_data->irq, ahc);
1227 if (ahc->tag == BUS_SPACE_PIO
1228 && ahc->bsh.ioport != 0)
1229 release_region(ahc->bsh.ioport, 256);
1230 if (ahc->tag == BUS_SPACE_MEMIO
1231 && ahc->bsh.maddr != NULL) {
1232 iounmap(ahc->bsh.maddr);
1233 release_mem_region(ahc->platform_data->mem_busaddr,
1234 0x1000);
1235 }
1236
1237 if (ahc->platform_data->host)
1238 scsi_host_put(ahc->platform_data->host);
1239
1240 kfree(ahc->platform_data);
1241 }
1242 }
1243
1244 void
ahc_platform_freeze_devq(struct ahc_softc * ahc,struct scb * scb)1245 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1246 {
1247 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1248 SCB_GET_CHANNEL(ahc, scb),
1249 SCB_GET_LUN(scb), SCB_LIST_NULL,
1250 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1251 }
1252
1253 void
ahc_platform_set_tags(struct ahc_softc * ahc,struct scsi_device * sdev,struct ahc_devinfo * devinfo,ahc_queue_alg alg)1254 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1255 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1256 {
1257 struct ahc_linux_device *dev;
1258 int was_queuing;
1259 int now_queuing;
1260
1261 if (sdev == NULL)
1262 return;
1263 dev = scsi_transport_device_data(sdev);
1264
1265 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1266 switch (alg) {
1267 default:
1268 case AHC_QUEUE_NONE:
1269 now_queuing = 0;
1270 break;
1271 case AHC_QUEUE_BASIC:
1272 now_queuing = AHC_DEV_Q_BASIC;
1273 break;
1274 case AHC_QUEUE_TAGGED:
1275 now_queuing = AHC_DEV_Q_TAGGED;
1276 break;
1277 }
1278 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1279 && (was_queuing != now_queuing)
1280 && (dev->active != 0)) {
1281 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1282 dev->qfrozen++;
1283 }
1284
1285 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1286 if (now_queuing) {
1287 u_int usertags;
1288
1289 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1290 if (!was_queuing) {
1291 /*
1292 * Start out aggressively and allow our
1293 * dynamic queue depth algorithm to take
1294 * care of the rest.
1295 */
1296 dev->maxtags = usertags;
1297 dev->openings = dev->maxtags - dev->active;
1298 }
1299 if (dev->maxtags == 0) {
1300 /*
1301 * Queueing is disabled by the user.
1302 */
1303 dev->openings = 1;
1304 } else if (alg == AHC_QUEUE_TAGGED) {
1305 dev->flags |= AHC_DEV_Q_TAGGED;
1306 if (aic7xxx_periodic_otag != 0)
1307 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1308 } else
1309 dev->flags |= AHC_DEV_Q_BASIC;
1310 } else {
1311 /* We can only have one opening. */
1312 dev->maxtags = 0;
1313 dev->openings = 1 - dev->active;
1314 }
1315 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1316 case AHC_DEV_Q_BASIC:
1317 case AHC_DEV_Q_TAGGED:
1318 scsi_change_queue_depth(sdev,
1319 dev->openings + dev->active);
1320 break;
1321 default:
1322 /*
1323 * We allow the OS to queue 2 untagged transactions to
1324 * us at any time even though we can only execute them
1325 * serially on the controller/device. This should
1326 * remove some latency.
1327 */
1328 scsi_change_queue_depth(sdev, 2);
1329 break;
1330 }
1331 }
1332
1333 int
ahc_platform_abort_scbs(struct ahc_softc * ahc,int target,char channel,int lun,u_int tag,role_t role,uint32_t status)1334 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1335 int lun, u_int tag, role_t role, uint32_t status)
1336 {
1337 return 0;
1338 }
1339
1340 static u_int
ahc_linux_user_tagdepth(struct ahc_softc * ahc,struct ahc_devinfo * devinfo)1341 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1342 {
1343 static int warned_user;
1344 u_int tags;
1345
1346 tags = 0;
1347 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1348 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
1349 if (warned_user == 0) {
1350
1351 printk(KERN_WARNING
1352 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1353 "aic7xxx: for installed controllers. Using defaults\n"
1354 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1355 "aic7xxx: the aic7xxx_osm..c source file.\n");
1356 warned_user++;
1357 }
1358 tags = AHC_MAX_QUEUE;
1359 } else {
1360 adapter_tag_info_t *tag_info;
1361
1362 tag_info = &aic7xxx_tag_info[ahc->unit];
1363 tags = tag_info->tag_commands[devinfo->target_offset];
1364 if (tags > AHC_MAX_QUEUE)
1365 tags = AHC_MAX_QUEUE;
1366 }
1367 }
1368 return (tags);
1369 }
1370
1371 /*
1372 * Determines the queue depth for a given device.
1373 */
1374 static void
ahc_linux_device_queue_depth(struct scsi_device * sdev)1375 ahc_linux_device_queue_depth(struct scsi_device *sdev)
1376 {
1377 struct ahc_devinfo devinfo;
1378 u_int tags;
1379 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1380
1381 ahc_compile_devinfo(&devinfo,
1382 sdev->sdev_target->channel == 0
1383 ? ahc->our_id : ahc->our_id_b,
1384 sdev->sdev_target->id, sdev->lun,
1385 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1386 ROLE_INITIATOR);
1387 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1388 if (tags != 0 && sdev->tagged_supported != 0) {
1389
1390 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1391 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1392 devinfo.lun, AC_TRANSFER_NEG);
1393 ahc_print_devinfo(ahc, &devinfo);
1394 printk("Tagged Queuing enabled. Depth %d\n", tags);
1395 } else {
1396 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1397 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1398 devinfo.lun, AC_TRANSFER_NEG);
1399 }
1400 }
1401
1402 static int
ahc_linux_run_command(struct ahc_softc * ahc,struct ahc_linux_device * dev,struct scsi_cmnd * cmd)1403 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1404 struct scsi_cmnd *cmd)
1405 {
1406 struct scb *scb;
1407 struct hardware_scb *hscb;
1408 struct ahc_initiator_tinfo *tinfo;
1409 struct ahc_tmode_tstate *tstate;
1410 uint16_t mask;
1411 struct scb_tailq *untagged_q = NULL;
1412 int nseg;
1413
1414 /*
1415 * Schedule us to run later. The only reason we are not
1416 * running is because the whole controller Q is frozen.
1417 */
1418 if (ahc->platform_data->qfrozen != 0)
1419 return SCSI_MLQUEUE_HOST_BUSY;
1420
1421 /*
1422 * We only allow one untagged transaction
1423 * per target in the initiator role unless
1424 * we are storing a full busy target *lun*
1425 * table in SCB space.
1426 */
1427 if (!(cmd->flags & SCMD_TAGGED)
1428 && (ahc->features & AHC_SCB_BTT) == 0) {
1429 int target_offset;
1430
1431 target_offset = cmd->device->id + cmd->device->channel * 8;
1432 untagged_q = &(ahc->untagged_queues[target_offset]);
1433 if (!TAILQ_EMPTY(untagged_q))
1434 /* if we're already executing an untagged command
1435 * we're busy to another */
1436 return SCSI_MLQUEUE_DEVICE_BUSY;
1437 }
1438
1439 nseg = scsi_dma_map(cmd);
1440 if (nseg < 0)
1441 return SCSI_MLQUEUE_HOST_BUSY;
1442
1443 /*
1444 * Get an scb to use.
1445 */
1446 scb = ahc_get_scb(ahc);
1447 if (!scb) {
1448 scsi_dma_unmap(cmd);
1449 return SCSI_MLQUEUE_HOST_BUSY;
1450 }
1451
1452 scb->io_ctx = cmd;
1453 scb->platform_data->dev = dev;
1454 hscb = scb->hscb;
1455 cmd->host_scribble = (char *)scb;
1456
1457 /*
1458 * Fill out basics of the HSCB.
1459 */
1460 hscb->control = 0;
1461 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1462 hscb->lun = cmd->device->lun;
1463 mask = SCB_GET_TARGET_MASK(ahc, scb);
1464 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1465 SCB_GET_OUR_ID(scb),
1466 SCB_GET_TARGET(ahc, scb), &tstate);
1467 hscb->scsirate = tinfo->scsirate;
1468 hscb->scsioffset = tinfo->curr.offset;
1469 if ((tstate->ultraenb & mask) != 0)
1470 hscb->control |= ULTRAENB;
1471
1472 if ((ahc->user_discenable & mask) != 0)
1473 hscb->control |= DISCENB;
1474
1475 if ((tstate->auto_negotiate & mask) != 0) {
1476 scb->flags |= SCB_AUTO_NEGOTIATE;
1477 scb->hscb->control |= MK_MESSAGE;
1478 }
1479
1480 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1481 if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1482 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1483 hscb->control |= MSG_ORDERED_TASK;
1484 dev->commands_since_idle_or_otag = 0;
1485 } else {
1486 hscb->control |= MSG_SIMPLE_TASK;
1487 }
1488 }
1489
1490 hscb->cdb_len = cmd->cmd_len;
1491 if (hscb->cdb_len <= 12) {
1492 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1493 } else {
1494 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1495 scb->flags |= SCB_CDB32_PTR;
1496 }
1497
1498 scb->platform_data->xfer_len = 0;
1499 ahc_set_residual(scb, 0);
1500 ahc_set_sense_residual(scb, 0);
1501 scb->sg_count = 0;
1502
1503 if (nseg > 0) {
1504 struct ahc_dma_seg *sg;
1505 struct scatterlist *cur_seg;
1506 int i;
1507
1508 /* Copy the segments into the SG list. */
1509 sg = scb->sg_list;
1510 /*
1511 * The sg_count may be larger than nseg if
1512 * a transfer crosses a 32bit page.
1513 */
1514 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1515 dma_addr_t addr;
1516 bus_size_t len;
1517 int consumed;
1518
1519 addr = sg_dma_address(cur_seg);
1520 len = sg_dma_len(cur_seg);
1521 consumed = ahc_linux_map_seg(ahc, scb,
1522 sg, addr, len);
1523 sg += consumed;
1524 scb->sg_count += consumed;
1525 }
1526 sg--;
1527 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1528
1529 /*
1530 * Reset the sg list pointer.
1531 */
1532 scb->hscb->sgptr =
1533 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1534
1535 /*
1536 * Copy the first SG into the "current"
1537 * data pointer area.
1538 */
1539 scb->hscb->dataptr = scb->sg_list->addr;
1540 scb->hscb->datacnt = scb->sg_list->len;
1541 } else {
1542 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1543 scb->hscb->dataptr = 0;
1544 scb->hscb->datacnt = 0;
1545 scb->sg_count = 0;
1546 }
1547
1548 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1549 dev->openings--;
1550 dev->active++;
1551 dev->commands_issued++;
1552 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1553 dev->commands_since_idle_or_otag++;
1554
1555 scb->flags |= SCB_ACTIVE;
1556 if (untagged_q) {
1557 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1558 scb->flags |= SCB_UNTAGGEDQ;
1559 }
1560 ahc_queue_scb(ahc, scb);
1561 return 0;
1562 }
1563
1564 /*
1565 * SCSI controller interrupt handler.
1566 */
1567 irqreturn_t
ahc_linux_isr(int irq,void * dev_id)1568 ahc_linux_isr(int irq, void *dev_id)
1569 {
1570 struct ahc_softc *ahc;
1571 u_long flags;
1572 int ours;
1573
1574 ahc = (struct ahc_softc *) dev_id;
1575 ahc_lock(ahc, &flags);
1576 ours = ahc_intr(ahc);
1577 ahc_unlock(ahc, &flags);
1578 return IRQ_RETVAL(ours);
1579 }
1580
1581 void
ahc_platform_flushwork(struct ahc_softc * ahc)1582 ahc_platform_flushwork(struct ahc_softc *ahc)
1583 {
1584
1585 }
1586
1587 void
ahc_send_async(struct ahc_softc * ahc,char channel,u_int target,u_int lun,ac_code code)1588 ahc_send_async(struct ahc_softc *ahc, char channel,
1589 u_int target, u_int lun, ac_code code)
1590 {
1591 switch (code) {
1592 case AC_TRANSFER_NEG:
1593 {
1594 struct scsi_target *starget;
1595 struct ahc_initiator_tinfo *tinfo;
1596 struct ahc_tmode_tstate *tstate;
1597 int target_offset;
1598 unsigned int target_ppr_options;
1599
1600 BUG_ON(target == CAM_TARGET_WILDCARD);
1601
1602 tinfo = ahc_fetch_transinfo(ahc, channel,
1603 channel == 'A' ? ahc->our_id
1604 : ahc->our_id_b,
1605 target, &tstate);
1606
1607 /*
1608 * Don't bother reporting results while
1609 * negotiations are still pending.
1610 */
1611 if (tinfo->curr.period != tinfo->goal.period
1612 || tinfo->curr.width != tinfo->goal.width
1613 || tinfo->curr.offset != tinfo->goal.offset
1614 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1615 if (bootverbose == 0)
1616 break;
1617
1618 /*
1619 * Don't bother reporting results that
1620 * are identical to those last reported.
1621 */
1622 target_offset = target;
1623 if (channel == 'B')
1624 target_offset += 8;
1625 starget = ahc->platform_data->starget[target_offset];
1626 if (starget == NULL)
1627 break;
1628
1629 target_ppr_options =
1630 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1631 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1632 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1633
1634 if (tinfo->curr.period == spi_period(starget)
1635 && tinfo->curr.width == spi_width(starget)
1636 && tinfo->curr.offset == spi_offset(starget)
1637 && tinfo->curr.ppr_options == target_ppr_options)
1638 if (bootverbose == 0)
1639 break;
1640
1641 spi_period(starget) = tinfo->curr.period;
1642 spi_width(starget) = tinfo->curr.width;
1643 spi_offset(starget) = tinfo->curr.offset;
1644 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1645 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1646 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1647 spi_display_xfer_agreement(starget);
1648 break;
1649 }
1650 case AC_SENT_BDR:
1651 {
1652 WARN_ON(lun != CAM_LUN_WILDCARD);
1653 scsi_report_device_reset(ahc->platform_data->host,
1654 channel - 'A', target);
1655 break;
1656 }
1657 case AC_BUS_RESET:
1658 if (ahc->platform_data->host != NULL) {
1659 scsi_report_bus_reset(ahc->platform_data->host,
1660 channel - 'A');
1661 }
1662 break;
1663 default:
1664 panic("ahc_send_async: Unexpected async event");
1665 }
1666 }
1667
1668 /*
1669 * Calls the higher level scsi done function and frees the scb.
1670 */
1671 void
ahc_done(struct ahc_softc * ahc,struct scb * scb)1672 ahc_done(struct ahc_softc *ahc, struct scb *scb)
1673 {
1674 struct scsi_cmnd *cmd;
1675 struct ahc_linux_device *dev;
1676
1677 LIST_REMOVE(scb, pending_links);
1678 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1679 struct scb_tailq *untagged_q;
1680 int target_offset;
1681
1682 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1683 untagged_q = &(ahc->untagged_queues[target_offset]);
1684 TAILQ_REMOVE(untagged_q, scb, links.tqe);
1685 BUG_ON(!TAILQ_EMPTY(untagged_q));
1686 } else if ((scb->flags & SCB_ACTIVE) == 0) {
1687 /*
1688 * Transactions aborted from the untagged queue may
1689 * not have been dispatched to the controller, so
1690 * only check the SCB_ACTIVE flag for tagged transactions.
1691 */
1692 printk("SCB %d done'd twice\n", scb->hscb->tag);
1693 ahc_dump_card_state(ahc);
1694 panic("Stopping for safety");
1695 }
1696 cmd = scb->io_ctx;
1697 dev = scb->platform_data->dev;
1698 dev->active--;
1699 dev->openings++;
1700 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1701 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1702 dev->qfrozen--;
1703 }
1704 ahc_linux_unmap_scb(ahc, scb);
1705
1706 /*
1707 * Guard against stale sense data.
1708 * The Linux mid-layer assumes that sense
1709 * was retrieved anytime the first byte of
1710 * the sense buffer looks "sane".
1711 */
1712 cmd->sense_buffer[0] = 0;
1713 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1714 #ifdef AHC_REPORT_UNDERFLOWS
1715 uint32_t amount_xferred;
1716
1717 amount_xferred =
1718 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1719 #endif
1720 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1721 #ifdef AHC_DEBUG
1722 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1723 ahc_print_path(ahc, scb);
1724 printk("Set CAM_UNCOR_PARITY\n");
1725 }
1726 #endif
1727 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1728 #ifdef AHC_REPORT_UNDERFLOWS
1729 /*
1730 * This code is disabled by default as some
1731 * clients of the SCSI system do not properly
1732 * initialize the underflow parameter. This
1733 * results in spurious termination of commands
1734 * that complete as expected (e.g. underflow is
1735 * allowed as command can return variable amounts
1736 * of data.
1737 */
1738 } else if (amount_xferred < scb->io_ctx->underflow) {
1739 u_int i;
1740
1741 ahc_print_path(ahc, scb);
1742 printk("CDB:");
1743 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1744 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1745 printk("\n");
1746 ahc_print_path(ahc, scb);
1747 printk("Saw underflow (%ld of %ld bytes). "
1748 "Treated as error\n",
1749 ahc_get_residual(scb),
1750 ahc_get_transfer_length(scb));
1751 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1752 #endif
1753 } else {
1754 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1755 }
1756 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1757 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1758 }
1759
1760 if (dev->openings == 1
1761 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1762 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1763 dev->tag_success_count++;
1764 /*
1765 * Some devices deal with temporary internal resource
1766 * shortages by returning queue full. When the queue
1767 * full occurrs, we throttle back. Slowly try to get
1768 * back to our previous queue depth.
1769 */
1770 if ((dev->openings + dev->active) < dev->maxtags
1771 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1772 dev->tag_success_count = 0;
1773 dev->openings++;
1774 }
1775
1776 if (dev->active == 0)
1777 dev->commands_since_idle_or_otag = 0;
1778
1779 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1780 printk("Recovery SCB completes\n");
1781 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1782 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1783 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1784
1785 if (ahc->platform_data->eh_done)
1786 complete(ahc->platform_data->eh_done);
1787 }
1788
1789 ahc_free_scb(ahc, scb);
1790 ahc_linux_queue_cmd_complete(ahc, cmd);
1791 }
1792
1793 static void
ahc_linux_handle_scsi_status(struct ahc_softc * ahc,struct scsi_device * sdev,struct scb * scb)1794 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
1795 struct scsi_device *sdev, struct scb *scb)
1796 {
1797 struct ahc_devinfo devinfo;
1798 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1799
1800 ahc_compile_devinfo(&devinfo,
1801 ahc->our_id,
1802 sdev->sdev_target->id, sdev->lun,
1803 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1804 ROLE_INITIATOR);
1805
1806 /*
1807 * We don't currently trust the mid-layer to
1808 * properly deal with queue full or busy. So,
1809 * when one occurs, we tell the mid-layer to
1810 * unconditionally requeue the command to us
1811 * so that we can retry it ourselves. We also
1812 * implement our own throttling mechanism so
1813 * we don't clobber the device with too many
1814 * commands.
1815 */
1816 switch (ahc_get_scsi_status(scb)) {
1817 default:
1818 break;
1819 case SCSI_STATUS_CHECK_COND:
1820 case SCSI_STATUS_CMD_TERMINATED:
1821 {
1822 struct scsi_cmnd *cmd;
1823
1824 /*
1825 * Copy sense information to the OS's cmd
1826 * structure if it is available.
1827 */
1828 cmd = scb->io_ctx;
1829 if (scb->flags & SCB_SENSE) {
1830 u_int sense_size;
1831
1832 sense_size = min(sizeof(struct scsi_sense_data)
1833 - ahc_get_sense_residual(scb),
1834 (u_long)SCSI_SENSE_BUFFERSIZE);
1835 memcpy(cmd->sense_buffer,
1836 ahc_get_sense_buf(ahc, scb), sense_size);
1837 if (sense_size < SCSI_SENSE_BUFFERSIZE)
1838 memset(&cmd->sense_buffer[sense_size], 0,
1839 SCSI_SENSE_BUFFERSIZE - sense_size);
1840 cmd->result |= (DRIVER_SENSE << 24);
1841 #ifdef AHC_DEBUG
1842 if (ahc_debug & AHC_SHOW_SENSE) {
1843 int i;
1844
1845 printk("Copied %d bytes of sense data:",
1846 sense_size);
1847 for (i = 0; i < sense_size; i++) {
1848 if ((i & 0xF) == 0)
1849 printk("\n");
1850 printk("0x%x ", cmd->sense_buffer[i]);
1851 }
1852 printk("\n");
1853 }
1854 #endif
1855 }
1856 break;
1857 }
1858 case SCSI_STATUS_QUEUE_FULL:
1859 {
1860 /*
1861 * By the time the core driver has returned this
1862 * command, all other commands that were queued
1863 * to us but not the device have been returned.
1864 * This ensures that dev->active is equal to
1865 * the number of commands actually queued to
1866 * the device.
1867 */
1868 dev->tag_success_count = 0;
1869 if (dev->active != 0) {
1870 /*
1871 * Drop our opening count to the number
1872 * of commands currently outstanding.
1873 */
1874 dev->openings = 0;
1875 /*
1876 ahc_print_path(ahc, scb);
1877 printk("Dropping tag count to %d\n", dev->active);
1878 */
1879 if (dev->active == dev->tags_on_last_queuefull) {
1880
1881 dev->last_queuefull_same_count++;
1882 /*
1883 * If we repeatedly see a queue full
1884 * at the same queue depth, this
1885 * device has a fixed number of tag
1886 * slots. Lock in this tag depth
1887 * so we stop seeing queue fulls from
1888 * this device.
1889 */
1890 if (dev->last_queuefull_same_count
1891 == AHC_LOCK_TAGS_COUNT) {
1892 dev->maxtags = dev->active;
1893 ahc_print_path(ahc, scb);
1894 printk("Locking max tag count at %d\n",
1895 dev->active);
1896 }
1897 } else {
1898 dev->tags_on_last_queuefull = dev->active;
1899 dev->last_queuefull_same_count = 0;
1900 }
1901 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1902 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
1903 ahc_platform_set_tags(ahc, sdev, &devinfo,
1904 (dev->flags & AHC_DEV_Q_BASIC)
1905 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1906 break;
1907 }
1908 /*
1909 * Drop down to a single opening, and treat this
1910 * as if the target returned BUSY SCSI status.
1911 */
1912 dev->openings = 1;
1913 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
1914 ahc_platform_set_tags(ahc, sdev, &devinfo,
1915 (dev->flags & AHC_DEV_Q_BASIC)
1916 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1917 break;
1918 }
1919 }
1920 }
1921
1922 static void
ahc_linux_queue_cmd_complete(struct ahc_softc * ahc,struct scsi_cmnd * cmd)1923 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1924 {
1925 /*
1926 * Map CAM error codes into Linux Error codes. We
1927 * avoid the conversion so that the DV code has the
1928 * full error information available when making
1929 * state change decisions.
1930 */
1931 {
1932 u_int new_status;
1933
1934 switch (ahc_cmd_get_transaction_status(cmd)) {
1935 case CAM_REQ_INPROG:
1936 case CAM_REQ_CMP:
1937 case CAM_SCSI_STATUS_ERROR:
1938 new_status = DID_OK;
1939 break;
1940 case CAM_REQ_ABORTED:
1941 new_status = DID_ABORT;
1942 break;
1943 case CAM_BUSY:
1944 new_status = DID_BUS_BUSY;
1945 break;
1946 case CAM_REQ_INVALID:
1947 case CAM_PATH_INVALID:
1948 new_status = DID_BAD_TARGET;
1949 break;
1950 case CAM_SEL_TIMEOUT:
1951 new_status = DID_NO_CONNECT;
1952 break;
1953 case CAM_SCSI_BUS_RESET:
1954 case CAM_BDR_SENT:
1955 new_status = DID_RESET;
1956 break;
1957 case CAM_UNCOR_PARITY:
1958 new_status = DID_PARITY;
1959 break;
1960 case CAM_CMD_TIMEOUT:
1961 new_status = DID_TIME_OUT;
1962 break;
1963 case CAM_UA_ABORT:
1964 case CAM_REQ_CMP_ERR:
1965 case CAM_AUTOSENSE_FAIL:
1966 case CAM_NO_HBA:
1967 case CAM_DATA_RUN_ERR:
1968 case CAM_UNEXP_BUSFREE:
1969 case CAM_SEQUENCE_FAIL:
1970 case CAM_CCB_LEN_ERR:
1971 case CAM_PROVIDE_FAIL:
1972 case CAM_REQ_TERMIO:
1973 case CAM_UNREC_HBA_ERROR:
1974 case CAM_REQ_TOO_BIG:
1975 new_status = DID_ERROR;
1976 break;
1977 case CAM_REQUEUE_REQ:
1978 new_status = DID_REQUEUE;
1979 break;
1980 default:
1981 /* We should never get here */
1982 new_status = DID_ERROR;
1983 break;
1984 }
1985
1986 ahc_cmd_set_transaction_status(cmd, new_status);
1987 }
1988
1989 cmd->scsi_done(cmd);
1990 }
1991
1992 static void
ahc_linux_freeze_simq(struct ahc_softc * ahc)1993 ahc_linux_freeze_simq(struct ahc_softc *ahc)
1994 {
1995 unsigned long s;
1996
1997 ahc_lock(ahc, &s);
1998 ahc->platform_data->qfrozen++;
1999 if (ahc->platform_data->qfrozen == 1) {
2000 scsi_block_requests(ahc->platform_data->host);
2001
2002 /* XXX What about Twin channels? */
2003 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2004 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2005 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2006 }
2007 ahc_unlock(ahc, &s);
2008 }
2009
2010 static void
ahc_linux_release_simq(struct ahc_softc * ahc)2011 ahc_linux_release_simq(struct ahc_softc *ahc)
2012 {
2013 u_long s;
2014 int unblock_reqs;
2015
2016 unblock_reqs = 0;
2017 ahc_lock(ahc, &s);
2018 if (ahc->platform_data->qfrozen > 0)
2019 ahc->platform_data->qfrozen--;
2020 if (ahc->platform_data->qfrozen == 0)
2021 unblock_reqs = 1;
2022 ahc_unlock(ahc, &s);
2023 /*
2024 * There is still a race here. The mid-layer
2025 * should keep its own freeze count and use
2026 * a bottom half handler to run the queues
2027 * so we can unblock with our own lock held.
2028 */
2029 if (unblock_reqs)
2030 scsi_unblock_requests(ahc->platform_data->host);
2031 }
2032
2033 static int
ahc_linux_queue_recovery_cmd(struct scsi_cmnd * cmd,scb_flag flag)2034 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2035 {
2036 struct ahc_softc *ahc;
2037 struct ahc_linux_device *dev;
2038 struct scb *pending_scb;
2039 u_int saved_scbptr;
2040 u_int active_scb_index;
2041 u_int last_phase;
2042 u_int saved_scsiid;
2043 u_int cdb_byte;
2044 int retval;
2045 int was_paused;
2046 int paused;
2047 int wait;
2048 int disconnected;
2049 unsigned long flags;
2050
2051 pending_scb = NULL;
2052 paused = FALSE;
2053 wait = FALSE;
2054 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2055
2056 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
2057 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2058
2059 printk("CDB:");
2060 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2061 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2062 printk("\n");
2063
2064 ahc_lock(ahc, &flags);
2065
2066 /*
2067 * First determine if we currently own this command.
2068 * Start by searching the device queue. If not found
2069 * there, check the pending_scb list. If not found
2070 * at all, and the system wanted us to just abort the
2071 * command, return success.
2072 */
2073 dev = scsi_transport_device_data(cmd->device);
2074
2075 if (dev == NULL) {
2076 /*
2077 * No target device for this command exists,
2078 * so we must not still own the command.
2079 */
2080 printk("%s:%d:%d:%d: Is not an active device\n",
2081 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2082 (u8)cmd->device->lun);
2083 retval = SUCCESS;
2084 goto no_cmd;
2085 }
2086
2087 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2088 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2089 cmd->device->channel + 'A',
2090 (u8)cmd->device->lun,
2091 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2092 printk("%s:%d:%d:%d: Command found on untagged queue\n",
2093 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2094 (u8)cmd->device->lun);
2095 retval = SUCCESS;
2096 goto done;
2097 }
2098
2099 /*
2100 * See if we can find a matching cmd in the pending list.
2101 */
2102 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2103 if (pending_scb->io_ctx == cmd)
2104 break;
2105 }
2106
2107 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2108
2109 /* Any SCB for this device will do for a target reset */
2110 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2111 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2112 scmd_channel(cmd) + 'A',
2113 CAM_LUN_WILDCARD,
2114 SCB_LIST_NULL, ROLE_INITIATOR))
2115 break;
2116 }
2117 }
2118
2119 if (pending_scb == NULL) {
2120 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2121 goto no_cmd;
2122 }
2123
2124 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2125 /*
2126 * We can't queue two recovery actions using the same SCB
2127 */
2128 retval = FAILED;
2129 goto done;
2130 }
2131
2132 /*
2133 * Ensure that the card doesn't do anything
2134 * behind our back and that we didn't "just" miss
2135 * an interrupt that would affect this cmd.
2136 */
2137 was_paused = ahc_is_paused(ahc);
2138 ahc_pause_and_flushwork(ahc);
2139 paused = TRUE;
2140
2141 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2142 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2143 goto no_cmd;
2144 }
2145
2146 printk("%s: At time of recovery, card was %spaused\n",
2147 ahc_name(ahc), was_paused ? "" : "not ");
2148 ahc_dump_card_state(ahc);
2149
2150 disconnected = TRUE;
2151 if (flag == SCB_ABORT) {
2152 if (ahc_search_qinfifo(ahc, cmd->device->id,
2153 cmd->device->channel + 'A',
2154 cmd->device->lun,
2155 pending_scb->hscb->tag,
2156 ROLE_INITIATOR, CAM_REQ_ABORTED,
2157 SEARCH_COMPLETE) > 0) {
2158 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2159 ahc_name(ahc), cmd->device->channel,
2160 cmd->device->id, (u8)cmd->device->lun);
2161 retval = SUCCESS;
2162 goto done;
2163 }
2164 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2165 cmd->device->channel + 'A',
2166 cmd->device->lun,
2167 pending_scb->hscb->tag,
2168 ROLE_INITIATOR, /*status*/0,
2169 SEARCH_COUNT) > 0) {
2170 disconnected = FALSE;
2171 }
2172
2173 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2174 struct scb *bus_scb;
2175
2176 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2177 if (bus_scb == pending_scb)
2178 disconnected = FALSE;
2179 else if (flag != SCB_ABORT
2180 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2181 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2182 disconnected = FALSE;
2183 }
2184
2185 /*
2186 * At this point, pending_scb is the scb associated with the
2187 * passed in command. That command is currently active on the
2188 * bus, is in the disconnected state, or we're hoping to find
2189 * a command for the same target active on the bus to abuse to
2190 * send a BDR. Queue the appropriate message based on which of
2191 * these states we are in.
2192 */
2193 last_phase = ahc_inb(ahc, LASTPHASE);
2194 saved_scbptr = ahc_inb(ahc, SCBPTR);
2195 active_scb_index = ahc_inb(ahc, SCB_TAG);
2196 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2197 if (last_phase != P_BUSFREE
2198 && (pending_scb->hscb->tag == active_scb_index
2199 || (flag == SCB_DEVICE_RESET
2200 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
2201
2202 /*
2203 * We're active on the bus, so assert ATN
2204 * and hope that the target responds.
2205 */
2206 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2207 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2208 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2209 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2210 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2211 wait = TRUE;
2212 } else if (disconnected) {
2213
2214 /*
2215 * Actually re-queue this SCB in an attempt
2216 * to select the device before it reconnects.
2217 * In either case (selection or reselection),
2218 * we will now issue the approprate message
2219 * to the timed-out device.
2220 *
2221 * Set the MK_MESSAGE control bit indicating
2222 * that we desire to send a message. We
2223 * also set the disconnected flag since
2224 * in the paging case there is no guarantee
2225 * that our SCB control byte matches the
2226 * version on the card. We don't want the
2227 * sequencer to abort the command thinking
2228 * an unsolicited reselection occurred.
2229 */
2230 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2231 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2232
2233 /*
2234 * Remove any cached copy of this SCB in the
2235 * disconnected list in preparation for the
2236 * queuing of our abort SCB. We use the
2237 * same element in the SCB, SCB_NEXT, for
2238 * both the qinfifo and the disconnected list.
2239 */
2240 ahc_search_disc_list(ahc, cmd->device->id,
2241 cmd->device->channel + 'A',
2242 cmd->device->lun, pending_scb->hscb->tag,
2243 /*stop_on_first*/TRUE,
2244 /*remove*/TRUE,
2245 /*save_state*/FALSE);
2246
2247 /*
2248 * In the non-paging case, the sequencer will
2249 * never re-reference the in-core SCB.
2250 * To make sure we are notified during
2251 * reselection, set the MK_MESSAGE flag in
2252 * the card's copy of the SCB.
2253 */
2254 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2255 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2256 ahc_outb(ahc, SCB_CONTROL,
2257 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2258 }
2259
2260 /*
2261 * Clear out any entries in the QINFIFO first
2262 * so we are the next SCB for this target
2263 * to run.
2264 */
2265 ahc_search_qinfifo(ahc, cmd->device->id,
2266 cmd->device->channel + 'A',
2267 cmd->device->lun, SCB_LIST_NULL,
2268 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2269 SEARCH_COMPLETE);
2270 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2271 ahc_outb(ahc, SCBPTR, saved_scbptr);
2272 ahc_print_path(ahc, pending_scb);
2273 printk("Device is disconnected, re-queuing SCB\n");
2274 wait = TRUE;
2275 } else {
2276 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2277 retval = FAILED;
2278 goto done;
2279 }
2280
2281 no_cmd:
2282 /*
2283 * Our assumption is that if we don't have the command, no
2284 * recovery action was required, so we return success. Again,
2285 * the semantics of the mid-layer recovery engine are not
2286 * well defined, so this may change in time.
2287 */
2288 retval = SUCCESS;
2289 done:
2290 if (paused)
2291 ahc_unpause(ahc);
2292 if (wait) {
2293 DECLARE_COMPLETION_ONSTACK(done);
2294
2295 ahc->platform_data->eh_done = &done;
2296 ahc_unlock(ahc, &flags);
2297
2298 printk("Recovery code sleeping\n");
2299 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2300 ahc_lock(ahc, &flags);
2301 ahc->platform_data->eh_done = NULL;
2302 ahc_unlock(ahc, &flags);
2303
2304 printk("Timer Expired\n");
2305 retval = FAILED;
2306 }
2307 printk("Recovery code awake\n");
2308 } else
2309 ahc_unlock(ahc, &flags);
2310 return (retval);
2311 }
2312
ahc_linux_set_width(struct scsi_target * starget,int width)2313 static void ahc_linux_set_width(struct scsi_target *starget, int width)
2314 {
2315 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2316 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2317 struct ahc_devinfo devinfo;
2318 unsigned long flags;
2319
2320 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2321 starget->channel + 'A', ROLE_INITIATOR);
2322 ahc_lock(ahc, &flags);
2323 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2324 ahc_unlock(ahc, &flags);
2325 }
2326
ahc_linux_set_period(struct scsi_target * starget,int period)2327 static void ahc_linux_set_period(struct scsi_target *starget, int period)
2328 {
2329 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2330 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2331 struct ahc_tmode_tstate *tstate;
2332 struct ahc_initiator_tinfo *tinfo
2333 = ahc_fetch_transinfo(ahc,
2334 starget->channel + 'A',
2335 shost->this_id, starget->id, &tstate);
2336 struct ahc_devinfo devinfo;
2337 unsigned int ppr_options = tinfo->goal.ppr_options;
2338 unsigned long flags;
2339 unsigned long offset = tinfo->goal.offset;
2340 const struct ahc_syncrate *syncrate;
2341
2342 if (offset == 0)
2343 offset = MAX_OFFSET;
2344
2345 if (period < 9)
2346 period = 9; /* 12.5ns is our minimum */
2347 if (period == 9) {
2348 if (spi_max_width(starget))
2349 ppr_options |= MSG_EXT_PPR_DT_REQ;
2350 else
2351 /* need wide for DT and need DT for 12.5 ns */
2352 period = 10;
2353 }
2354
2355 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2356 starget->channel + 'A', ROLE_INITIATOR);
2357
2358 /* all PPR requests apart from QAS require wide transfers */
2359 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2360 if (spi_width(starget) == 0)
2361 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2362 }
2363
2364 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2365 ahc_lock(ahc, &flags);
2366 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2367 ppr_options, AHC_TRANS_GOAL, FALSE);
2368 ahc_unlock(ahc, &flags);
2369 }
2370
ahc_linux_set_offset(struct scsi_target * starget,int offset)2371 static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2372 {
2373 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2374 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2375 struct ahc_tmode_tstate *tstate;
2376 struct ahc_initiator_tinfo *tinfo
2377 = ahc_fetch_transinfo(ahc,
2378 starget->channel + 'A',
2379 shost->this_id, starget->id, &tstate);
2380 struct ahc_devinfo devinfo;
2381 unsigned int ppr_options = 0;
2382 unsigned int period = 0;
2383 unsigned long flags;
2384 const struct ahc_syncrate *syncrate = NULL;
2385
2386 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2387 starget->channel + 'A', ROLE_INITIATOR);
2388 if (offset != 0) {
2389 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2390 period = tinfo->goal.period;
2391 ppr_options = tinfo->goal.ppr_options;
2392 }
2393 ahc_lock(ahc, &flags);
2394 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2395 ppr_options, AHC_TRANS_GOAL, FALSE);
2396 ahc_unlock(ahc, &flags);
2397 }
2398
ahc_linux_set_dt(struct scsi_target * starget,int dt)2399 static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2400 {
2401 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2402 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2403 struct ahc_tmode_tstate *tstate;
2404 struct ahc_initiator_tinfo *tinfo
2405 = ahc_fetch_transinfo(ahc,
2406 starget->channel + 'A',
2407 shost->this_id, starget->id, &tstate);
2408 struct ahc_devinfo devinfo;
2409 unsigned int ppr_options = tinfo->goal.ppr_options
2410 & ~MSG_EXT_PPR_DT_REQ;
2411 unsigned int period = tinfo->goal.period;
2412 unsigned int width = tinfo->goal.width;
2413 unsigned long flags;
2414 const struct ahc_syncrate *syncrate;
2415
2416 if (dt && spi_max_width(starget)) {
2417 ppr_options |= MSG_EXT_PPR_DT_REQ;
2418 if (!width)
2419 ahc_linux_set_width(starget, 1);
2420 } else if (period == 9)
2421 period = 10; /* if resetting DT, period must be >= 25ns */
2422
2423 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2424 starget->channel + 'A', ROLE_INITIATOR);
2425 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
2426 ahc_lock(ahc, &flags);
2427 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2428 ppr_options, AHC_TRANS_GOAL, FALSE);
2429 ahc_unlock(ahc, &flags);
2430 }
2431
2432 #if 0
2433 /* FIXME: This code claims to support IU and QAS. However, the actual
2434 * sequencer code and aic7xxx_core have no support for these parameters and
2435 * will get into a bad state if they're negotiated. Do not enable this
2436 * unless you know what you're doing */
2437 static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2438 {
2439 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2440 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2441 struct ahc_tmode_tstate *tstate;
2442 struct ahc_initiator_tinfo *tinfo
2443 = ahc_fetch_transinfo(ahc,
2444 starget->channel + 'A',
2445 shost->this_id, starget->id, &tstate);
2446 struct ahc_devinfo devinfo;
2447 unsigned int ppr_options = tinfo->goal.ppr_options
2448 & ~MSG_EXT_PPR_QAS_REQ;
2449 unsigned int period = tinfo->goal.period;
2450 unsigned long flags;
2451 struct ahc_syncrate *syncrate;
2452
2453 if (qas)
2454 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2455
2456 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2457 starget->channel + 'A', ROLE_INITIATOR);
2458 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2459 ahc_lock(ahc, &flags);
2460 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2461 ppr_options, AHC_TRANS_GOAL, FALSE);
2462 ahc_unlock(ahc, &flags);
2463 }
2464
2465 static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2466 {
2467 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2468 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2469 struct ahc_tmode_tstate *tstate;
2470 struct ahc_initiator_tinfo *tinfo
2471 = ahc_fetch_transinfo(ahc,
2472 starget->channel + 'A',
2473 shost->this_id, starget->id, &tstate);
2474 struct ahc_devinfo devinfo;
2475 unsigned int ppr_options = tinfo->goal.ppr_options
2476 & ~MSG_EXT_PPR_IU_REQ;
2477 unsigned int period = tinfo->goal.period;
2478 unsigned long flags;
2479 struct ahc_syncrate *syncrate;
2480
2481 if (iu)
2482 ppr_options |= MSG_EXT_PPR_IU_REQ;
2483
2484 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2485 starget->channel + 'A', ROLE_INITIATOR);
2486 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2487 ahc_lock(ahc, &flags);
2488 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2489 ppr_options, AHC_TRANS_GOAL, FALSE);
2490 ahc_unlock(ahc, &flags);
2491 }
2492 #endif
2493
ahc_linux_get_signalling(struct Scsi_Host * shost)2494 static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2495 {
2496 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
2497 unsigned long flags;
2498 u8 mode;
2499
2500 if (!(ahc->features & AHC_ULTRA2)) {
2501 /* non-LVD chipset, may not have SBLKCTL reg */
2502 spi_signalling(shost) =
2503 ahc->features & AHC_HVD ?
2504 SPI_SIGNAL_HVD :
2505 SPI_SIGNAL_SE;
2506 return;
2507 }
2508
2509 ahc_lock(ahc, &flags);
2510 ahc_pause(ahc);
2511 mode = ahc_inb(ahc, SBLKCTL);
2512 ahc_unpause(ahc);
2513 ahc_unlock(ahc, &flags);
2514
2515 if (mode & ENAB40)
2516 spi_signalling(shost) = SPI_SIGNAL_LVD;
2517 else if (mode & ENAB20)
2518 spi_signalling(shost) = SPI_SIGNAL_SE;
2519 else
2520 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2521 }
2522
2523 static struct spi_function_template ahc_linux_transport_functions = {
2524 .set_offset = ahc_linux_set_offset,
2525 .show_offset = 1,
2526 .set_period = ahc_linux_set_period,
2527 .show_period = 1,
2528 .set_width = ahc_linux_set_width,
2529 .show_width = 1,
2530 .set_dt = ahc_linux_set_dt,
2531 .show_dt = 1,
2532 #if 0
2533 .set_iu = ahc_linux_set_iu,
2534 .show_iu = 1,
2535 .set_qas = ahc_linux_set_qas,
2536 .show_qas = 1,
2537 #endif
2538 .get_signalling = ahc_linux_get_signalling,
2539 };
2540
2541
2542
2543 static int __init
ahc_linux_init(void)2544 ahc_linux_init(void)
2545 {
2546 /*
2547 * If we've been passed any parameters, process them now.
2548 */
2549 if (aic7xxx)
2550 aic7xxx_setup(aic7xxx);
2551
2552 ahc_linux_transport_template =
2553 spi_attach_transport(&ahc_linux_transport_functions);
2554 if (!ahc_linux_transport_template)
2555 return -ENODEV;
2556
2557 scsi_transport_reserve_device(ahc_linux_transport_template,
2558 sizeof(struct ahc_linux_device));
2559
2560 ahc_linux_pci_init();
2561 ahc_linux_eisa_init();
2562 return 0;
2563 }
2564
2565 static void
ahc_linux_exit(void)2566 ahc_linux_exit(void)
2567 {
2568 ahc_linux_pci_exit();
2569 ahc_linux_eisa_exit();
2570 spi_release_transport(ahc_linux_transport_template);
2571 }
2572
2573 module_init(ahc_linux_init);
2574 module_exit(ahc_linux_exit);
2575