blob: fc6a83188c1e0fab6a2bb4583eda2a2d6771c619 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
92d161c2005-04-17 16:59:33 -0500125
126static struct scsi_transport_template *ahc_linux_transport_template = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128#include <linux/init.h> /* __setup */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129#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 */
Tejun Heo5a0e3ad2010-03-24 17:04:11 +0900132#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135/*
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/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 * To change the default number of tagged transactions allowed per-device,
149 * add a line to the lilo.conf file like:
150 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
151 * which will result in the first four devices on the first two
152 * controllers being set to a tagged queue depth of 32.
153 *
154 * The tag_commands is an array of 16 to allow for wide and twin adapters.
155 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
156 * for channel 1.
157 */
158typedef struct {
159 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
160} adapter_tag_info_t;
161
162/*
163 * Modify this as you see fit for your system.
164 *
165 * 0 tagged queuing disabled
166 * 1 <= n <= 253 n == max tags ever dispatched.
167 *
168 * The driver will throttle the number of commands dispatched to a
169 * device if it returns queue full. For devices with a fixed maximum
170 * queue depth, the driver will eventually determine this depth and
171 * lock it in (a console message is printed to indicate that a lock
172 * has occurred). On some devices, queue full is returned for a temporary
173 * resource shortage. These devices will return queue full at varying
174 * depths. The driver will throttle back when the queue fulls occur and
175 * attempt to slowly increase the depth over time as the device recovers
176 * from the resource shortage.
177 *
178 * In this example, the first line will disable tagged queueing for all
179 * the devices on the first probed aic7xxx adapter.
180 *
181 * The second line enables tagged queueing with 4 commands/LUN for IDs
182 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
183 * driver to attempt to use up to 64 tags for ID 1.
184 *
185 * The third line is the same as the first line.
186 *
187 * The fourth line disables tagged queueing for devices 0 and 3. It
188 * enables tagged queueing for the other IDs, with 16 commands/LUN
189 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
190 * IDs 2, 5-7, and 9-15.
191 */
192
193/*
194 * NOTE: The below structure is for reference only, the actual structure
195 * to modify in order to change things is just below this comment block.
196adapter_tag_info_t aic7xxx_tag_info[] =
197{
198 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
199 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
200 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
201 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
202};
203*/
204
205#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
206#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
207#else
208#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
209#endif
210
211#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
212 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
213 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
214 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
215 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
216 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
217 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
218 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
219 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
220}
221
222/*
223 * By default, use the number of commands specified by
224 * the users kernel configuration.
225 */
226static adapter_tag_info_t aic7xxx_tag_info[] =
227{
228 {AIC7XXX_CONFIGED_TAG_COMMANDS},
229 {AIC7XXX_CONFIGED_TAG_COMMANDS},
230 {AIC7XXX_CONFIGED_TAG_COMMANDS},
231 {AIC7XXX_CONFIGED_TAG_COMMANDS},
232 {AIC7XXX_CONFIGED_TAG_COMMANDS},
233 {AIC7XXX_CONFIGED_TAG_COMMANDS},
234 {AIC7XXX_CONFIGED_TAG_COMMANDS},
235 {AIC7XXX_CONFIGED_TAG_COMMANDS},
236 {AIC7XXX_CONFIGED_TAG_COMMANDS},
237 {AIC7XXX_CONFIGED_TAG_COMMANDS},
238 {AIC7XXX_CONFIGED_TAG_COMMANDS},
239 {AIC7XXX_CONFIGED_TAG_COMMANDS},
240 {AIC7XXX_CONFIGED_TAG_COMMANDS},
241 {AIC7XXX_CONFIGED_TAG_COMMANDS},
242 {AIC7XXX_CONFIGED_TAG_COMMANDS},
243 {AIC7XXX_CONFIGED_TAG_COMMANDS}
244};
245
246/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 * There should be a specific return value for this in scsi.h, but
248 * it seems that most drivers ignore it.
249 */
250#define DID_UNDERFLOW DID_ERROR
251
252void
253ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
254{
255 printk("(scsi%d:%c:%d:%d): ",
256 ahc->platform_data->host->host_no,
257 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
258 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
259 scb != NULL ? SCB_GET_LUN(scb) : -1);
260}
261
262/*
263 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
264 * cards in the system. This should be fixed. Exceptions to this
265 * rule are noted in the comments.
266 */
267
268/*
269 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
270 * has no effect on any later resets that might occur due to things like
271 * SCSI bus timeouts.
272 */
273static uint32_t aic7xxx_no_reset;
274
275/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 * Should we force EXTENDED translation on a controller.
277 * 0 == Use whatever is in the SEEPROM or default to off
278 * 1 == Use whatever is in the SEEPROM or default to on
279 */
280static uint32_t aic7xxx_extended;
281
282/*
283 * PCI bus parity checking of the Adaptec controllers. This is somewhat
284 * dubious at best. To my knowledge, this option has never actually
285 * solved a PCI parity problem, but on certain machines with broken PCI
286 * chipset configurations where stray PCI transactions with bad parity are
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300287 * the norm rather than the exception, the error messages can be overwhelming.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 * It's included in the driver for completeness.
289 * 0 = Shut off PCI parity check
290 * non-0 = reverse polarity pci parity checking
291 */
292static uint32_t aic7xxx_pci_parity = ~0;
293
294/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 * There are lots of broken chipsets in the world. Some of them will
296 * violate the PCI spec when we issue byte sized memory writes to our
297 * controller. I/O mapped register access, if allowed by the given
298 * platform, will work in almost all cases.
299 */
300uint32_t aic7xxx_allow_memio = ~0;
301
302/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 * So that we can set how long each device is given as a selection timeout.
304 * The table of values goes like this:
305 * 0 - 256ms
306 * 1 - 128ms
307 * 2 - 64ms
308 * 3 - 32ms
309 * We default to 256ms because some older devices need a longer time
310 * to respond to initial selection.
311 */
312static uint32_t aic7xxx_seltime;
313
314/*
315 * Certain devices do not perform any aging on commands. Should the
316 * device be saturated by commands in one portion of the disk, it is
317 * possible for transactions on far away sectors to never be serviced.
318 * To handle these devices, we can periodically send an ordered tag to
319 * force all outstanding transactions to be serviced prior to a new
320 * transaction.
321 */
Adrian Bunk289fe5b2006-10-20 14:47:57 -0700322static uint32_t aic7xxx_periodic_otag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
324/*
325 * Module information and settable options.
326 */
327static char *aic7xxx = NULL;
328
Hannes Reinecke64624d42007-10-19 10:32:29 +0200329MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
330MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331MODULE_LICENSE("Dual BSD/GPL");
332MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
333module_param(aic7xxx, charp, 0444);
334MODULE_PARM_DESC(aic7xxx,
Randy Dunlap2b6ee9b2006-08-14 23:09:23 -0700335"period-delimited options string:\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336" 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"
Joe Perchesb1c11812008-02-03 17:28:22 +0200341" no_reset Suppress initial bus resets\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342" 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"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347" 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"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350" seltime:<int> Selection Timeout\n"
351" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
352"\n"
Lucas De Marchi970e2482012-03-30 13:37:16 -0700353" 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"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357"\n"
358" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
359);
360
361static void ahc_linux_handle_scsi_status(struct ahc_softc *,
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500362 struct scsi_device *,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 struct scb *);
364static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200365 struct scsi_cmnd *cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
James Bottomleydacee842006-01-10 12:11:42 -0600367static void ahc_linux_release_simq(struct ahc_softc *ahc);
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200368static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
371 struct ahc_devinfo *devinfo);
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500372static void ahc_linux_device_queue_depth(struct scsi_device *);
James Bottomley e4e360c2005-05-16 16:39:38 -0500373static int ahc_linux_run_command(struct ahc_softc*,
374 struct ahc_linux_device *,
375 struct scsi_cmnd *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376static void ahc_linux_setup_tag_info_global(char *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377static int aic7xxx_setup(char *s);
Christoph Hellwig2a403422005-06-28 16:50:40 +0200378
379static int ahc_linux_unit;
380
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Denys Vlasenkobe0d6762008-03-23 04:41:22 +0100382/************************** OS Utility Wrappers *******************************/
383void
384ahc_delay(long usec)
385{
386 /*
387 * udelay on Linux can have problems for
388 * multi-millisecond waits. Wait at most
389 * 1024us per call.
390 */
391 while (usec > 0) {
392 udelay(usec % 1024);
393 usec -= 1024;
394 }
395}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
Denys Vlasenkobe0d6762008-03-23 04:41:22 +0100397/***************************** Low Level I/O **********************************/
398uint8_t
399ahc_inb(struct ahc_softc * ahc, long port)
400{
401 uint8_t x;
402
403 if (ahc->tag == BUS_SPACE_MEMIO) {
404 x = readb(ahc->bsh.maddr + port);
405 } else {
406 x = inb(ahc->bsh.ioport + port);
407 }
408 mb();
409 return (x);
410}
411
412void
413ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
414{
415 if (ahc->tag == BUS_SPACE_MEMIO) {
416 writeb(val, ahc->bsh.maddr + port);
417 } else {
418 outb(val, ahc->bsh.ioport + port);
419 }
420 mb();
421}
422
423void
424ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
425{
426 int i;
427
428 /*
429 * There is probably a more efficient way to do this on Linux
430 * but we don't use this for anything speed critical and this
431 * should work.
432 */
433 for (i = 0; i < count; i++)
434 ahc_outb(ahc, port, *array++);
435}
436
437void
438ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
439{
440 int i;
441
442 /*
443 * There is probably a more efficient way to do this on Linux
444 * but we don't use this for anything speed critical and this
445 * should work.
446 */
447 for (i = 0; i < count; i++)
448 *array++ = ahc_inb(ahc, port);
449}
450
451/********************************* Inlines ************************************/
452static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
453
454static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 struct ahc_dma_seg *sg,
456 dma_addr_t addr, bus_size_t len);
457
Denys Vlasenkobe0d6762008-03-23 04:41:22 +0100458static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
460{
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200461 struct scsi_cmnd *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462
463 cmd = scb->io_ctx;
464 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
FUJITA Tomonori3a57c4a2007-05-26 01:55:14 +0900466 scsi_dma_unmap(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467}
468
Denys Vlasenkobe0d6762008-03-23 04:41:22 +0100469static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470ahc_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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 * Return a string describing the driver.
493 */
494static const char *
495ahc_linux_info(struct Scsi_Host *host)
496{
497 static char buffer[512];
498 char ahc_info[256];
499 char *bp;
500 struct ahc_softc *ahc;
501
502 bp = &buffer[0];
503 ahc = *(struct ahc_softc **)host->hostdata;
504 memset(bp, 0, sizeof(buffer));
Denys Vlasenko980b3062008-04-25 04:36:01 +0200505 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n"
506 " <");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 strcat(bp, ahc->description);
Denys Vlasenko980b3062008-04-25 04:36:01 +0200508 strcat(bp, ">\n"
509 " ");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 ahc_controller_info(ahc, ahc_info);
511 strcat(bp, ahc_info);
512 strcat(bp, "\n");
513
514 return (bp);
515}
516
517/*
518 * Queue an SCB to the controller.
519 */
520static int
Jeff Garzikf2812332010-11-16 02:10:29 -0500521ahc_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522{
523 struct ahc_softc *ahc;
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500524 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
Christoph Hellwig6d5e9fd2005-10-31 20:03:48 +0100525 int rtn = SCSI_MLQUEUE_HOST_BUSY;
526 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
528 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
529
Christoph Hellwig6d5e9fd2005-10-31 20:03:48 +0100530 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537
Christoph Hellwig6d5e9fd2005-10-31 20:03:48 +0100538 return rtn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539}
540
Jeff Garzikf2812332010-11-16 02:10:29 -0500541static DEF_SCSI_QCMD(ahc_linux_queue)
542
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500543static inline struct scsi_target **
544ahc_linux_target_in_softc(struct scsi_target *starget)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545{
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500546 struct ahc_softc *ahc =
547 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
James Bottomley fb3089d2005-05-17 21:09:52 -0500548 unsigned int target_offset;
James Bottomley c7525232005-05-17 18:07:34 -0500549
550 target_offset = starget->id;
551 if (starget->channel != 0)
552 target_offset += 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500554 return &ahc->platform_data->starget[target_offset];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555}
556
557static int
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500558ahc_linux_target_alloc(struct scsi_target *starget)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559{
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500560 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);
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500565 unsigned short scsirate;
566 struct ahc_devinfo devinfo;
567 struct ahc_initiator_tinfo *tinfo;
568 struct ahc_tmode_tstate *tstate;
569 char channel = starget->channel + 'A';
570 unsigned int our_id = ahc->our_id;
571 unsigned int target_offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500573 target_offset = starget->id;
574 if (starget->channel != 0)
575 target_offset += 8;
576
577 if (starget->channel)
578 our_id = ahc->our_id_b;
James Bottomley c7525232005-05-17 18:07:34 -0500579
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500580 ahc_lock(ahc, &flags);
James Bottomley c7525232005-05-17 18:07:34 -0500581
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500582 BUG_ON(*ahc_targp != NULL);
cb624022005-04-17 18:03:20 -0500583
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500584 *ahc_targp = starget;
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500585
586 if (sc) {
James Bottomley12021ff2005-06-13 20:58:56 -0500587 int maxsync = AHC_SYNCRATE_DT;
588 int ultra = 0;
589 int flags = sc->device_flags[target_offset];
590
591 if (ahc->flags & AHC_NEWEEPROM_FMT) {
592 if (flags & CFSYNCHISULTRA)
593 ultra = 1;
594 } else if (flags & CFULTRAEN)
595 ultra = 1;
596 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
597 * change it to ultra=0, CFXFER = 0 */
598 if(ultra && (flags & CFXFER) == 0x04) {
599 ultra = 0;
600 flags &= ~CFXFER;
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500601 }
James Bottomley12021ff2005-06-13 20:58:56 -0500602
603 if ((ahc->features & AHC_ULTRA2) != 0) {
604 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
605 } else {
606 scsirate = (flags & CFXFER) << 4;
607 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
608 AHC_SYNCRATE_FAST;
609 }
610 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
611 if (!(flags & CFSYNCH))
612 spi_max_offset(starget) = 0;
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500613 spi_min_period(starget) =
James Bottomley12021ff2005-06-13 20:58:56 -0500614 ahc_find_period(ahc, scsirate, maxsync);
615
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500616 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
617 starget->id, &tstate);
618 }
619 ahc_compile_devinfo(&devinfo, our_id, starget->id,
620 CAM_LUN_WILDCARD, channel,
621 ROLE_INITIATOR);
622 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
623 AHC_TRANS_GOAL, /*paused*/FALSE);
624 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
625 AHC_TRANS_GOAL, /*paused*/FALSE);
626 ahc_unlock(ahc, &flags);
cb624022005-04-17 18:03:20 -0500627
James Bottomley c7525232005-05-17 18:07:34 -0500628 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629}
630
631static void
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500632ahc_linux_target_destroy(struct scsi_target *starget)
633{
634 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
635
636 *ahc_targp = NULL;
637}
638
639static int
640ahc_linux_slave_alloc(struct scsi_device *sdev)
641{
642 struct ahc_softc *ahc =
643 *((struct ahc_softc **)sdev->host->hostdata);
644 struct scsi_target *starget = sdev->sdev_target;
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500645 struct ahc_linux_device *dev;
646
647 if (bootverbose)
Pekka Enberg48813cf2010-07-14 13:12:57 +0300648 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500649
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500650 dev = scsi_transport_device_data(sdev);
651 memset(dev, 0, sizeof(*dev));
652
653 /*
654 * We start out life using untagged
655 * transactions of which we allow one.
656 */
657 dev->openings = 1;
658
659 /*
660 * Set maxtags to 0. This will be changed if we
661 * later determine that we are dealing with
662 * a tagged queuing capable device.
663 */
664 dev->maxtags = 0;
665
James Bottomley79778a22005-08-04 17:33:22 -0500666 spi_period(starget) = 0;
667
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500668 return 0;
669}
670
671static int
672ahc_linux_slave_configure(struct scsi_device *sdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673{
674 struct ahc_softc *ahc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500676 ahc = *((struct ahc_softc **)sdev->host->hostdata);
677
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 if (bootverbose)
Jeff Garzik017560f2005-10-24 18:04:36 -0400679 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500680
681 ahc_linux_device_queue_depth(sdev);
682
683 /* Initial Domain Validation */
684 if (!spi_initial_dv(sdev->sdev_target))
685 spi_dv_device(sdev);
686
687 return 0;
688}
689
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690#if defined(__i386__)
691/*
692 * Return the disk geometry for the given SCSI device.
693 */
694static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
696 sector_t capacity, int geom[])
697{
698 uint8_t *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 int heads;
700 int sectors;
701 int cylinders;
702 int ret;
703 int extended;
704 struct ahc_softc *ahc;
705 u_int channel;
706
707 ahc = *((struct ahc_softc **)sdev->host->hostdata);
Jeff Garzik422c0d62005-10-24 18:05:09 -0400708 channel = sdev_channel(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 bh = scsi_bios_ptable(bdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 if (bh) {
712 ret = scsi_partsize(bh, capacity,
713 &geom[2], &geom[0], &geom[1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 kfree(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 if (ret != -1)
716 return (ret);
717 }
718 heads = 64;
719 sectors = 32;
720 cylinders = aic_sector_div(capacity, heads, sectors);
721
722 if (aic7xxx_extended != 0)
723 extended = 1;
724 else if (channel == 0)
725 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
726 else
727 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
728 if (extended && cylinders >= 1024) {
729 heads = 255;
730 sectors = 63;
731 cylinders = aic_sector_div(capacity, heads, sectors);
732 }
733 geom[0] = heads;
734 geom[1] = sectors;
735 geom[2] = cylinders;
736 return (0);
737}
738#endif
739
740/*
741 * Abort the current SCSI command(s).
742 */
743static int
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200744ahc_linux_abort(struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745{
746 int error;
747
748 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
749 if (error != 0)
Pekka Enberg48813cf2010-07-14 13:12:57 +0300750 printk("aic7xxx_abort returns 0x%x\n", error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 return (error);
752}
753
754/*
755 * Attempt to send a target reset message to the device that timed out.
756 */
757static int
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200758ahc_linux_dev_reset(struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759{
760 int error;
761
762 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
763 if (error != 0)
Pekka Enberg48813cf2010-07-14 13:12:57 +0300764 printk("aic7xxx_dev_reset returns 0x%x\n", error);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 return (error);
766}
767
768/*
769 * Reset the SCSI bus.
770 */
771static int
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200772ahc_linux_bus_reset(struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773{
774 struct ahc_softc *ahc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 int found;
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400776 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777
778 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400779
780 ahc_lock(ahc, &flags);
Jeff Garzik422c0d62005-10-24 18:05:09 -0400781 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 /*initiate reset*/TRUE);
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400783 ahc_unlock(ahc, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784
785 if (bootverbose)
Pekka Enberg48813cf2010-07-14 13:12:57 +0300786 printk("%s: SCSI bus reset delivered. "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 "%d SCBs aborted.\n", ahc_name(ahc), found);
788
789 return SUCCESS;
790}
791
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200792struct scsi_host_template aic7xxx_driver_template = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 .module = THIS_MODULE,
794 .name = "aic7xxx",
Christoph Hellwigdfd287f2005-06-28 16:49:44 +0200795 .proc_name = "aic7xxx",
Al Viro6b3a8bb2013-03-31 04:07:31 -0400796 .show_info = ahc_linux_show_info,
797 .write_info = ahc_proc_write_seeprom,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 .info = ahc_linux_info,
799 .queuecommand = ahc_linux_queue,
800 .eh_abort_handler = ahc_linux_abort,
801 .eh_device_reset_handler = ahc_linux_dev_reset,
802 .eh_bus_reset_handler = ahc_linux_bus_reset,
803#if defined(__i386__)
804 .bios_param = ahc_linux_biosparam,
805#endif
806 .can_queue = AHC_MAX_QUEUE,
807 .this_id = -1,
Hannes Reinecke80f14432006-10-06 09:22:41 +0200808 .max_sectors = 8192,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 .cmd_per_lun = 2,
810 .use_clustering = ENABLE_CLUSTERING,
811 .slave_alloc = ahc_linux_slave_alloc,
812 .slave_configure = ahc_linux_slave_configure,
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500813 .target_alloc = ahc_linux_target_alloc,
814 .target_destroy = ahc_linux_target_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815};
816
817/**************************** Tasklet Handler *********************************/
818
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819/******************************** Macros **************************************/
820#define BUILD_SCSIID(ahc, cmd) \
821 ((((cmd)->device->id << TID_SHIFT) & TID) \
822 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
823 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
824
825/******************************** Bus DMA *************************************/
826int
827ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
828 bus_size_t alignment, bus_size_t boundary,
829 dma_addr_t lowaddr, dma_addr_t highaddr,
830 bus_dma_filter_t *filter, void *filterarg,
831 bus_size_t maxsize, int nsegments,
832 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
833{
834 bus_dma_tag_t dmat;
835
Pekka Enberg48813cf2010-07-14 13:12:57 +0300836 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 if (dmat == NULL)
838 return (ENOMEM);
839
840 /*
841 * Linux is very simplistic about DMA memory. For now don't
842 * maintain all specification information. Once Linux supplies
843 * better facilities for doing these operations, or the
844 * needs of this particular driver change, we might need to do
845 * more here.
846 */
847 dmat->alignment = alignment;
848 dmat->boundary = boundary;
849 dmat->maxsize = maxsize;
850 *ret_tag = dmat;
851 return (0);
852}
853
854void
855ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
856{
Pekka Enberg48813cf2010-07-14 13:12:57 +0300857 kfree(dmat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858}
859
860int
861ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
862 int flags, bus_dmamap_t *mapp)
863{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 *vaddr = pci_alloc_consistent(ahc->dev_softc,
Christoph Hellwig 7dfa0f22005-05-16 18:54:12 +0200865 dmat->maxsize, mapp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 if (*vaddr == NULL)
Christoph Hellwig 7dfa0f22005-05-16 18:54:12 +0200867 return ENOMEM;
868 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869}
870
871void
872ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
873 void* vaddr, bus_dmamap_t map)
874{
875 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
Christoph Hellwig 7dfa0f22005-05-16 18:54:12 +0200876 vaddr, map);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877}
878
879int
880ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
881 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
882 void *cb_arg, int flags)
883{
884 /*
885 * Assume for now that this will only be used during
886 * initialization and not for per-transaction buffer mapping.
887 */
888 bus_dma_segment_t stack_sg;
889
Christoph Hellwig 7dfa0f22005-05-16 18:54:12 +0200890 stack_sg.ds_addr = map;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 stack_sg.ds_len = dmat->maxsize;
892 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
893 return (0);
894}
895
896void
897ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
898{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899}
900
901int
902ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
903{
904 /* Nothing to do */
905 return (0);
906}
907
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908static void
909ahc_linux_setup_tag_info_global(char *p)
910{
911 int tags, i, j;
912
913 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
Pekka Enberg48813cf2010-07-14 13:12:57 +0300914 printk("Setting Global Tags= %d\n", tags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915
Tobias Klauser6391a112006-06-08 22:23:48 -0700916 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 for (j = 0; j < AHC_NUM_TARGETS; j++) {
918 aic7xxx_tag_info[i].tag_commands[j] = tags;
919 }
920 }
921}
922
923static void
924ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
925{
926
927 if ((instance >= 0) && (targ >= 0)
Tobias Klauser6391a112006-06-08 22:23:48 -0700928 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 && (targ < AHC_NUM_TARGETS)) {
930 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
931 if (bootverbose)
Pekka Enberg48813cf2010-07-14 13:12:57 +0300932 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 }
934}
935
Christoph Hellwig1ff92732005-08-19 18:57:13 +0200936static char *
937ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
938 void (*callback)(u_long, int, int, int32_t),
939 u_long callback_arg)
940{
941 char *tok_end;
942 char *tok_end2;
943 int i;
944 int instance;
945 int targ;
946 int done;
947 char tok_list[] = {'.', ',', '{', '}', '\0'};
948
949 /* All options use a ':' name/arg separator */
950 if (*opt_arg != ':')
951 return (opt_arg);
952 opt_arg++;
953 instance = -1;
954 targ = -1;
955 done = FALSE;
956 /*
957 * Restore separator that may be in
958 * the middle of our option argument.
959 */
960 tok_end = strchr(opt_arg, '\0');
961 if (tok_end < end)
962 *tok_end = ',';
963 while (!done) {
964 switch (*opt_arg) {
965 case '{':
966 if (instance == -1) {
967 instance = 0;
968 } else {
969 if (depth > 1) {
970 if (targ == -1)
971 targ = 0;
972 } else {
Pekka Enberg48813cf2010-07-14 13:12:57 +0300973 printk("Malformed Option %s\n",
Christoph Hellwig1ff92732005-08-19 18:57:13 +0200974 opt_name);
975 done = TRUE;
976 }
977 }
978 opt_arg++;
979 break;
980 case '}':
981 if (targ != -1)
982 targ = -1;
983 else if (instance != -1)
984 instance = -1;
985 opt_arg++;
986 break;
987 case ',':
988 case '.':
989 if (instance == -1)
990 done = TRUE;
991 else if (targ >= 0)
992 targ++;
993 else if (instance >= 0)
994 instance++;
995 opt_arg++;
996 break;
997 case '\0':
998 done = TRUE;
999 break;
1000 default:
1001 tok_end = end;
1002 for (i = 0; tok_list[i]; i++) {
1003 tok_end2 = strchr(opt_arg, tok_list[i]);
1004 if ((tok_end2) && (tok_end2 < tok_end))
1005 tok_end = tok_end2;
1006 }
1007 callback(callback_arg, instance, targ,
1008 simple_strtol(opt_arg, NULL, 0));
1009 opt_arg = tok_end;
1010 break;
1011 }
1012 }
1013 return (opt_arg);
1014}
1015
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016/*
1017 * Handle Linux boot parameters. This routine allows for assigning a value
1018 * to a parameter with a ':' between the parameter and the value.
1019 * ie. aic7xxx=stpwlev:1,extended
1020 */
1021static int
1022aic7xxx_setup(char *s)
1023{
1024 int i, n;
1025 char *p;
1026 char *end;
1027
Denys Vlasenko980b3062008-04-25 04:36:01 +02001028 static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 const char *name;
1030 uint32_t *flag;
1031 } options[] = {
1032 { "extended", &aic7xxx_extended },
1033 { "no_reset", &aic7xxx_no_reset },
1034 { "verbose", &aic7xxx_verbose },
1035 { "allow_memio", &aic7xxx_allow_memio},
1036#ifdef AHC_DEBUG
1037 { "debug", &ahc_debug },
1038#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 { "periodic_otag", &aic7xxx_periodic_otag },
1040 { "pci_parity", &aic7xxx_pci_parity },
1041 { "seltime", &aic7xxx_seltime },
1042 { "tag_info", NULL },
1043 { "global_tag_depth", NULL },
1044 { "dv", NULL }
1045 };
1046
1047 end = strchr(s, '\0');
1048
1049 /*
Tobias Klauser6391a112006-06-08 22:23:48 -07001050 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 * will never be 0 in this case.
1052 */
1053 n = 0;
1054
1055 while ((p = strsep(&s, ",.")) != NULL) {
1056 if (*p == '\0')
1057 continue;
Tobias Klauser6391a112006-06-08 22:23:48 -07001058 for (i = 0; i < ARRAY_SIZE(options); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059
1060 n = strlen(options[i].name);
1061 if (strncmp(options[i].name, p, n) == 0)
1062 break;
1063 }
Tobias Klauser6391a112006-06-08 22:23:48 -07001064 if (i == ARRAY_SIZE(options))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 continue;
1066
1067 if (strncmp(p, "global_tag_depth", n) == 0) {
1068 ahc_linux_setup_tag_info_global(p + n);
1069 } else if (strncmp(p, "tag_info", n) == 0) {
Christoph Hellwig1ff92732005-08-19 18:57:13 +02001070 s = ahc_parse_brace_option("tag_info", p + n, end,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 2, ahc_linux_setup_tag_info, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 } else if (p[n] == ':') {
1073 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1074 } else if (strncmp(p, "verbose", n) == 0) {
1075 *(options[i].flag) = 1;
1076 } else {
1077 *(options[i].flag) ^= 0xFFFFFFFF;
1078 }
1079 }
1080 return 1;
1081}
1082
1083__setup("aic7xxx=", aic7xxx_setup);
1084
1085uint32_t aic7xxx_verbose;
1086
1087int
Christoph Hellwig 013791e2005-05-16 18:52:39 +02001088ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089{
Jesper Juhl9e1fe932005-12-14 19:27:20 +01001090 char buf[80];
1091 struct Scsi_Host *host;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 char *new_name;
Jesper Juhl9e1fe932005-12-14 19:27:20 +01001093 u_long s;
1094 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095
1096 template->name = ahc->description;
1097 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1098 if (host == NULL)
1099 return (ENOMEM);
1100
1101 *((struct ahc_softc **)host->hostdata) = ahc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 ahc->platform_data->host = host;
1103 host->can_queue = AHC_MAX_QUEUE;
1104 host->cmd_per_lun = 2;
1105 /* XXX No way to communicate the ID for multiple channels */
1106 host->this_id = ahc->our_id;
1107 host->irq = ahc->platform_data->irq;
1108 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1109 host->max_lun = AHC_NUM_LUNS;
1110 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1111 host->sg_tablesize = AHC_NSEG;
James Bottomleydacee842006-01-10 12:11:42 -06001112 ahc_lock(ahc, &s);
Christoph Hellwig2a403422005-06-28 16:50:40 +02001113 ahc_set_unit(ahc, ahc_linux_unit++);
James Bottomleydacee842006-01-10 12:11:42 -06001114 ahc_unlock(ahc, &s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 sprintf(buf, "scsi%d", host->host_no);
Pekka Enberg48813cf2010-07-14 13:12:57 +03001116 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 if (new_name != NULL) {
1118 strcpy(new_name, buf);
1119 ahc_set_name(ahc, new_name);
1120 }
1121 host->unique_id = ahc->unit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 ahc_linux_initialize_scsi_bus(ahc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123 ahc_intr_enable(ahc, TRUE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124
92d161c2005-04-17 16:59:33 -05001125 host->transportt = ahc_linux_transport_template;
1126
Jesper Juhl9e1fe932005-12-14 19:27:20 +01001127 retval = scsi_add_host(host,
1128 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
1129 if (retval) {
1130 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1131 scsi_host_put(host);
1132 return retval;
1133 }
1134
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 scsi_scan_host(host);
Jesper Juhl9e1fe932005-12-14 19:27:20 +01001136 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137}
1138
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 * Place the SCSI bus into a known state by either resetting it,
1141 * or forcing transfer negotiations on the next command to any
1142 * target.
1143 */
1144void
1145ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1146{
1147 int i;
1148 int numtarg;
James Bottomleydacee842006-01-10 12:11:42 -06001149 unsigned long s;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150
1151 i = 0;
1152 numtarg = 0;
1153
James Bottomleydacee842006-01-10 12:11:42 -06001154 ahc_lock(ahc, &s);
1155
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 if (aic7xxx_no_reset != 0)
1157 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1158
1159 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1160 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1161 else
1162 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1163
1164 if ((ahc->features & AHC_TWIN) != 0) {
1165
1166 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1167 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1168 } else {
1169 if (numtarg == 0)
1170 i = 8;
1171 numtarg += 8;
1172 }
1173 }
1174
1175 /*
1176 * Force negotiation to async for all targets that
1177 * will not see an initial bus reset.
1178 */
1179 for (; i < numtarg; i++) {
1180 struct ahc_devinfo devinfo;
1181 struct ahc_initiator_tinfo *tinfo;
1182 struct ahc_tmode_tstate *tstate;
1183 u_int our_id;
1184 u_int target_id;
1185 char channel;
1186
1187 channel = 'A';
1188 our_id = ahc->our_id;
1189 target_id = i;
1190 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1191 channel = 'B';
1192 our_id = ahc->our_id_b;
1193 target_id = i % 8;
1194 }
1195 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1196 target_id, &tstate);
1197 ahc_compile_devinfo(&devinfo, our_id, target_id,
1198 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1199 ahc_update_neg_request(ahc, &devinfo, tstate,
1200 tinfo, AHC_NEG_ALWAYS);
1201 }
James Bottomleydacee842006-01-10 12:11:42 -06001202 ahc_unlock(ahc, &s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 /* Give the bus some time to recover */
1204 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1205 ahc_linux_freeze_simq(ahc);
James Bottomleydacee842006-01-10 12:11:42 -06001206 msleep(AIC7XXX_RESET_DELAY);
1207 ahc_linux_release_simq(ahc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 }
1209}
1210
1211int
1212ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1213{
1214
1215 ahc->platform_data =
Michael Opdenacker114fc1d2015-03-26 17:51:46 -07001216 kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 if (ahc->platform_data == NULL)
1218 return (ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 ahc_lockinit(ahc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1222 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1223 if (aic7xxx_pci_parity == 0)
1224 ahc->flags |= AHC_DISABLE_PCI_PERR;
1225
1226 return (0);
1227}
1228
1229void
1230ahc_platform_free(struct ahc_softc *ahc)
1231{
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001232 struct scsi_target *starget;
Hannes Reinecke90800632006-10-23 15:25:36 +02001233 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234
1235 if (ahc->platform_data != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236 /* destroy all of the device and target objects */
1237 for (i = 0; i < AHC_NUM_TARGETS; i++) {
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001238 starget = ahc->platform_data->starget[i];
1239 if (starget != NULL) {
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001240 ahc->platform_data->starget[i] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 }
1242 }
1243
1244 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1245 free_irq(ahc->platform_data->irq, ahc);
1246 if (ahc->tag == BUS_SPACE_PIO
1247 && ahc->bsh.ioport != 0)
1248 release_region(ahc->bsh.ioport, 256);
1249 if (ahc->tag == BUS_SPACE_MEMIO
1250 && ahc->bsh.maddr != NULL) {
1251 iounmap(ahc->bsh.maddr);
1252 release_mem_region(ahc->platform_data->mem_busaddr,
1253 0x1000);
1254 }
Christoph Hellwig dedd8312005-05-16 18:52:06 +02001255
James Bottomley97af50f2005-10-02 15:22:35 -05001256 if (ahc->platform_data->host)
1257 scsi_host_put(ahc->platform_data->host);
1258
Pekka Enberg48813cf2010-07-14 13:12:57 +03001259 kfree(ahc->platform_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 }
1261}
1262
1263void
1264ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1265{
1266 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1267 SCB_GET_CHANNEL(ahc, scb),
1268 SCB_GET_LUN(scb), SCB_LIST_NULL,
1269 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1270}
1271
1272void
Hannes Reinecke90800632006-10-23 15:25:36 +02001273ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1274 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275{
1276 struct ahc_linux_device *dev;
1277 int was_queuing;
1278 int now_queuing;
1279
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001280 if (sdev == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 return;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001282 dev = scsi_transport_device_data(sdev);
1283
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1285 switch (alg) {
1286 default:
1287 case AHC_QUEUE_NONE:
1288 now_queuing = 0;
1289 break;
1290 case AHC_QUEUE_BASIC:
1291 now_queuing = AHC_DEV_Q_BASIC;
1292 break;
1293 case AHC_QUEUE_TAGGED:
1294 now_queuing = AHC_DEV_Q_TAGGED;
1295 break;
1296 }
1297 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1298 && (was_queuing != now_queuing)
1299 && (dev->active != 0)) {
1300 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1301 dev->qfrozen++;
1302 }
1303
1304 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1305 if (now_queuing) {
1306 u_int usertags;
1307
1308 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1309 if (!was_queuing) {
1310 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001311 * Start out aggressively and allow our
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 * dynamic queue depth algorithm to take
1313 * care of the rest.
1314 */
1315 dev->maxtags = usertags;
1316 dev->openings = dev->maxtags - dev->active;
1317 }
1318 if (dev->maxtags == 0) {
1319 /*
1320 * Queueing is disabled by the user.
1321 */
1322 dev->openings = 1;
1323 } else if (alg == AHC_QUEUE_TAGGED) {
1324 dev->flags |= AHC_DEV_Q_TAGGED;
1325 if (aic7xxx_periodic_otag != 0)
1326 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1327 } else
1328 dev->flags |= AHC_DEV_Q_BASIC;
1329 } else {
1330 /* We can only have one opening. */
1331 dev->maxtags = 0;
1332 dev->openings = 1 - dev->active;
1333 }
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001334 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1335 case AHC_DEV_Q_BASIC:
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001336 case AHC_DEV_Q_TAGGED:
Christoph Hellwigdb5ed4d2014-11-13 15:08:42 +01001337 scsi_change_queue_depth(sdev,
Christoph Hellwig2ecb2042014-11-03 14:09:02 +01001338 dev->openings + dev->active);
Alan5a51a7a2016-02-15 18:53:15 +00001339 break;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001340 default:
1341 /*
1342 * We allow the OS to queue 2 untagged transactions to
1343 * us at any time even though we can only execute them
1344 * serially on the controller/device. This should
1345 * remove some latency.
1346 */
Christoph Hellwigdb5ed4d2014-11-13 15:08:42 +01001347 scsi_change_queue_depth(sdev, 2);
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001348 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350}
1351
1352int
1353ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1354 int lun, u_int tag, role_t role, uint32_t status)
1355{
James Bottomley e4e360c2005-05-16 16:39:38 -05001356 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357}
1358
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359static u_int
1360ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1361{
1362 static int warned_user;
1363 u_int tags;
1364
1365 tags = 0;
1366 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
Tobias Klauser6391a112006-06-08 22:23:48 -07001367 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 if (warned_user == 0) {
1369
Pekka Enberg48813cf2010-07-14 13:12:57 +03001370 printk(KERN_WARNING
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371"aic7xxx: WARNING: Insufficient tag_info instances\n"
1372"aic7xxx: for installed controllers. Using defaults\n"
1373"aic7xxx: Please update the aic7xxx_tag_info array in\n"
1374"aic7xxx: the aic7xxx_osm..c source file.\n");
1375 warned_user++;
1376 }
1377 tags = AHC_MAX_QUEUE;
1378 } else {
1379 adapter_tag_info_t *tag_info;
1380
1381 tag_info = &aic7xxx_tag_info[ahc->unit];
1382 tags = tag_info->tag_commands[devinfo->target_offset];
1383 if (tags > AHC_MAX_QUEUE)
1384 tags = AHC_MAX_QUEUE;
1385 }
1386 }
1387 return (tags);
1388}
1389
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390/*
1391 * Determines the queue depth for a given device.
1392 */
1393static void
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001394ahc_linux_device_queue_depth(struct scsi_device *sdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395{
1396 struct ahc_devinfo devinfo;
1397 u_int tags;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001398 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399
1400 ahc_compile_devinfo(&devinfo,
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001401 sdev->sdev_target->channel == 0
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402 ? ahc->our_id : ahc->our_id_b,
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001403 sdev->sdev_target->id, sdev->lun,
1404 sdev->sdev_target->channel == 0 ? 'A' : 'B',
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 ROLE_INITIATOR);
1406 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001407 if (tags != 0 && sdev->tagged_supported != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408
Hannes Reinecke90800632006-10-23 15:25:36 +02001409 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1410 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1411 devinfo.lun, AC_TRANSFER_NEG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 ahc_print_devinfo(ahc, &devinfo);
Pekka Enberg48813cf2010-07-14 13:12:57 +03001413 printk("Tagged Queuing enabled. Depth %d\n", tags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414 } else {
Hannes Reinecke90800632006-10-23 15:25:36 +02001415 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1416 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1417 devinfo.lun, AC_TRANSFER_NEG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 }
1419}
1420
James Bottomley e4e360c2005-05-16 16:39:38 -05001421static int
1422ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1423 struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 struct scb *scb;
1426 struct hardware_scb *hscb;
1427 struct ahc_initiator_tinfo *tinfo;
1428 struct ahc_tmode_tstate *tstate;
1429 uint16_t mask;
James Bottomley e4e360c2005-05-16 16:39:38 -05001430 struct scb_tailq *untagged_q = NULL;
FUJITA Tomonori3a57c4a2007-05-26 01:55:14 +09001431 int nseg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432
James Bottomley e4e360c2005-05-16 16:39:38 -05001433 /*
1434 * Schedule us to run later. The only reason we are not
1435 * running is because the whole controller Q is frozen.
1436 */
1437 if (ahc->platform_data->qfrozen != 0)
1438 return SCSI_MLQUEUE_HOST_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439
James Bottomley e4e360c2005-05-16 16:39:38 -05001440 /*
1441 * We only allow one untagged transaction
1442 * per target in the initiator role unless
1443 * we are storing a full busy target *lun*
1444 * table in SCB space.
1445 */
Christoph Hellwig125c99b2014-11-03 12:47:47 +01001446 if (!(cmd->flags & SCMD_TAGGED)
James Bottomley e4e360c2005-05-16 16:39:38 -05001447 && (ahc->features & AHC_SCB_BTT) == 0) {
1448 int target_offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449
James Bottomley e4e360c2005-05-16 16:39:38 -05001450 target_offset = cmd->device->id + cmd->device->channel * 8;
1451 untagged_q = &(ahc->untagged_queues[target_offset]);
1452 if (!TAILQ_EMPTY(untagged_q))
1453 /* if we're already executing an untagged command
1454 * we're busy to another */
1455 return SCSI_MLQUEUE_DEVICE_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456 }
James Bottomley e4e360c2005-05-16 16:39:38 -05001457
FUJITA Tomonori647b2422008-03-09 22:50:41 +09001458 nseg = scsi_dma_map(cmd);
1459 if (nseg < 0)
1460 return SCSI_MLQUEUE_HOST_BUSY;
1461
James Bottomley e4e360c2005-05-16 16:39:38 -05001462 /*
1463 * Get an scb to use.
1464 */
Christoph Hellwig8eb37942005-06-11 00:13:30 +02001465 scb = ahc_get_scb(ahc);
FUJITA Tomonori647b2422008-03-09 22:50:41 +09001466 if (!scb) {
1467 scsi_dma_unmap(cmd);
Christoph Hellwig8eb37942005-06-11 00:13:30 +02001468 return SCSI_MLQUEUE_HOST_BUSY;
FUJITA Tomonori647b2422008-03-09 22:50:41 +09001469 }
James Bottomley e4e360c2005-05-16 16:39:38 -05001470
1471 scb->io_ctx = cmd;
1472 scb->platform_data->dev = dev;
1473 hscb = scb->hscb;
1474 cmd->host_scribble = (char *)scb;
1475
1476 /*
1477 * Fill out basics of the HSCB.
1478 */
1479 hscb->control = 0;
1480 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1481 hscb->lun = cmd->device->lun;
1482 mask = SCB_GET_TARGET_MASK(ahc, scb);
1483 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1484 SCB_GET_OUR_ID(scb),
1485 SCB_GET_TARGET(ahc, scb), &tstate);
1486 hscb->scsirate = tinfo->scsirate;
1487 hscb->scsioffset = tinfo->curr.offset;
1488 if ((tstate->ultraenb & mask) != 0)
1489 hscb->control |= ULTRAENB;
1490
1491 if ((ahc->user_discenable & mask) != 0)
1492 hscb->control |= DISCENB;
1493
1494 if ((tstate->auto_negotiate & mask) != 0) {
1495 scb->flags |= SCB_AUTO_NEGOTIATE;
1496 scb->hscb->control |= MK_MESSAGE;
1497 }
1498
1499 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
Christoph Hellwig50668632014-10-30 14:30:06 +01001500 if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
Christoph Hellwig dedd8312005-05-16 18:52:06 +02001501 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
James Bottomley e4e360c2005-05-16 16:39:38 -05001502 hscb->control |= MSG_ORDERED_TASK;
1503 dev->commands_since_idle_or_otag = 0;
1504 } else {
1505 hscb->control |= MSG_SIMPLE_TASK;
1506 }
1507 }
1508
1509 hscb->cdb_len = cmd->cmd_len;
1510 if (hscb->cdb_len <= 12) {
1511 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1512 } else {
1513 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1514 scb->flags |= SCB_CDB32_PTR;
1515 }
1516
1517 scb->platform_data->xfer_len = 0;
1518 ahc_set_residual(scb, 0);
1519 ahc_set_sense_residual(scb, 0);
1520 scb->sg_count = 0;
FUJITA Tomonori3a57c4a2007-05-26 01:55:14 +09001521
FUJITA Tomonori3a57c4a2007-05-26 01:55:14 +09001522 if (nseg > 0) {
James Bottomley e4e360c2005-05-16 16:39:38 -05001523 struct ahc_dma_seg *sg;
1524 struct scatterlist *cur_seg;
FUJITA Tomonori3a57c4a2007-05-26 01:55:14 +09001525 int i;
James Bottomley e4e360c2005-05-16 16:39:38 -05001526
James Bottomley e4e360c2005-05-16 16:39:38 -05001527 /* Copy the segments into the SG list. */
1528 sg = scb->sg_list;
1529 /*
1530 * The sg_count may be larger than nseg if
1531 * a transfer crosses a 32bit page.
FUJITA Tomonori3a57c4a2007-05-26 01:55:14 +09001532 */
1533 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
James Bottomley e4e360c2005-05-16 16:39:38 -05001534 dma_addr_t addr;
1535 bus_size_t len;
1536 int consumed;
1537
1538 addr = sg_dma_address(cur_seg);
1539 len = sg_dma_len(cur_seg);
1540 consumed = ahc_linux_map_seg(ahc, scb,
1541 sg, addr, len);
1542 sg += consumed;
1543 scb->sg_count += consumed;
James Bottomley e4e360c2005-05-16 16:39:38 -05001544 }
1545 sg--;
1546 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1547
1548 /*
1549 * Reset the sg list pointer.
1550 */
1551 scb->hscb->sgptr =
1552 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1553
1554 /*
1555 * Copy the first SG into the "current"
1556 * data pointer area.
1557 */
1558 scb->hscb->dataptr = scb->sg_list->addr;
1559 scb->hscb->datacnt = scb->sg_list->len;
James Bottomley e4e360c2005-05-16 16:39:38 -05001560 } else {
1561 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1562 scb->hscb->dataptr = 0;
1563 scb->hscb->datacnt = 0;
1564 scb->sg_count = 0;
1565 }
1566
1567 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1568 dev->openings--;
1569 dev->active++;
1570 dev->commands_issued++;
1571 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1572 dev->commands_since_idle_or_otag++;
1573
1574 scb->flags |= SCB_ACTIVE;
1575 if (untagged_q) {
1576 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1577 scb->flags |= SCB_UNTAGGEDQ;
1578 }
1579 ahc_queue_scb(ahc, scb);
1580 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581}
1582
1583/*
1584 * SCSI controller interrupt handler.
1585 */
1586irqreturn_t
David Howells7d12e782006-10-05 14:55:46 +01001587ahc_linux_isr(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588{
1589 struct ahc_softc *ahc;
1590 u_long flags;
1591 int ours;
1592
1593 ahc = (struct ahc_softc *) dev_id;
1594 ahc_lock(ahc, &flags);
1595 ours = ahc_intr(ahc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596 ahc_unlock(ahc, &flags);
1597 return IRQ_RETVAL(ours);
1598}
1599
1600void
1601ahc_platform_flushwork(struct ahc_softc *ahc)
1602{
1603
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604}
1605
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606void
1607ahc_send_async(struct ahc_softc *ahc, char channel,
Hannes Reinecke90800632006-10-23 15:25:36 +02001608 u_int target, u_int lun, ac_code code)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609{
1610 switch (code) {
1611 case AC_TRANSFER_NEG:
1612 {
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001613 struct scsi_target *starget;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614 struct ahc_linux_target *targ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 struct ahc_initiator_tinfo *tinfo;
1616 struct ahc_tmode_tstate *tstate;
1617 int target_offset;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001618 unsigned int target_ppr_options;
1619
1620 BUG_ON(target == CAM_TARGET_WILDCARD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622 tinfo = ahc_fetch_transinfo(ahc, channel,
1623 channel == 'A' ? ahc->our_id
1624 : ahc->our_id_b,
1625 target, &tstate);
1626
1627 /*
1628 * Don't bother reporting results while
1629 * negotiations are still pending.
1630 */
1631 if (tinfo->curr.period != tinfo->goal.period
1632 || tinfo->curr.width != tinfo->goal.width
1633 || tinfo->curr.offset != tinfo->goal.offset
1634 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1635 if (bootverbose == 0)
1636 break;
1637
1638 /*
1639 * Don't bother reporting results that
1640 * are identical to those last reported.
1641 */
1642 target_offset = target;
1643 if (channel == 'B')
1644 target_offset += 8;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001645 starget = ahc->platform_data->starget[target_offset];
James Bottomleyfc789a92005-08-05 16:24:54 -05001646 if (starget == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647 break;
James Bottomleyfc789a92005-08-05 16:24:54 -05001648 targ = scsi_transport_target_data(starget);
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001649
1650 target_ppr_options =
1651 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1652 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1653 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1654
1655 if (tinfo->curr.period == spi_period(starget)
1656 && tinfo->curr.width == spi_width(starget)
1657 && tinfo->curr.offset == spi_offset(starget)
1658 && tinfo->curr.ppr_options == target_ppr_options)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659 if (bootverbose == 0)
1660 break;
1661
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001662 spi_period(starget) = tinfo->curr.period;
1663 spi_width(starget) = tinfo->curr.width;
1664 spi_offset(starget) = tinfo->curr.offset;
James Bottomleyf7ff8982005-07-30 10:37:55 -05001665 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1666 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1667 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001668 spi_display_xfer_agreement(starget);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669 break;
1670 }
1671 case AC_SENT_BDR:
1672 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673 WARN_ON(lun != CAM_LUN_WILDCARD);
1674 scsi_report_device_reset(ahc->platform_data->host,
1675 channel - 'A', target);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676 break;
1677 }
1678 case AC_BUS_RESET:
1679 if (ahc->platform_data->host != NULL) {
1680 scsi_report_bus_reset(ahc->platform_data->host,
1681 channel - 'A');
1682 }
1683 break;
1684 default:
1685 panic("ahc_send_async: Unexpected async event");
1686 }
1687}
1688
1689/*
1690 * Calls the higher level scsi done function and frees the scb.
1691 */
1692void
1693ahc_done(struct ahc_softc *ahc, struct scb *scb)
1694{
Christoph Hellwig 013791e2005-05-16 18:52:39 +02001695 struct scsi_cmnd *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696 struct ahc_linux_device *dev;
1697
1698 LIST_REMOVE(scb, pending_links);
1699 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1700 struct scb_tailq *untagged_q;
1701 int target_offset;
1702
1703 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1704 untagged_q = &(ahc->untagged_queues[target_offset]);
1705 TAILQ_REMOVE(untagged_q, scb, links.tqe);
James Bottomley e4e360c2005-05-16 16:39:38 -05001706 BUG_ON(!TAILQ_EMPTY(untagged_q));
David Milburn969ceff2008-01-25 12:16:18 -06001707 } else if ((scb->flags & SCB_ACTIVE) == 0) {
1708 /*
1709 * Transactions aborted from the untagged queue may
1710 * not have been dispatched to the controller, so
1711 * only check the SCB_ACTIVE flag for tagged transactions.
1712 */
Pekka Enberg48813cf2010-07-14 13:12:57 +03001713 printk("SCB %d done'd twice\n", scb->hscb->tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 ahc_dump_card_state(ahc);
1715 panic("Stopping for safety");
1716 }
1717 cmd = scb->io_ctx;
1718 dev = scb->platform_data->dev;
1719 dev->active--;
1720 dev->openings++;
1721 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1722 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1723 dev->qfrozen--;
1724 }
1725 ahc_linux_unmap_scb(ahc, scb);
1726
1727 /*
1728 * Guard against stale sense data.
1729 * The Linux mid-layer assumes that sense
1730 * was retrieved anytime the first byte of
1731 * the sense buffer looks "sane".
1732 */
1733 cmd->sense_buffer[0] = 0;
1734 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1735 uint32_t amount_xferred;
1736
1737 amount_xferred =
1738 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1739 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1740#ifdef AHC_DEBUG
1741 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1742 ahc_print_path(ahc, scb);
Pekka Enberg48813cf2010-07-14 13:12:57 +03001743 printk("Set CAM_UNCOR_PARITY\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 }
1745#endif
1746 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1747#ifdef AHC_REPORT_UNDERFLOWS
1748 /*
1749 * This code is disabled by default as some
1750 * clients of the SCSI system do not properly
1751 * initialize the underflow parameter. This
1752 * results in spurious termination of commands
1753 * that complete as expected (e.g. underflow is
1754 * allowed as command can return variable amounts
1755 * of data.
1756 */
1757 } else if (amount_xferred < scb->io_ctx->underflow) {
1758 u_int i;
1759
1760 ahc_print_path(ahc, scb);
Pekka Enberg48813cf2010-07-14 13:12:57 +03001761 printk("CDB:");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762 for (i = 0; i < scb->io_ctx->cmd_len; i++)
Pekka Enberg48813cf2010-07-14 13:12:57 +03001763 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1764 printk("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 ahc_print_path(ahc, scb);
Pekka Enberg48813cf2010-07-14 13:12:57 +03001766 printk("Saw underflow (%ld of %ld bytes). "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 "Treated as error\n",
1768 ahc_get_residual(scb),
1769 ahc_get_transfer_length(scb));
1770 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1771#endif
1772 } else {
1773 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1774 }
1775 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001776 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778
1779 if (dev->openings == 1
1780 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1781 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1782 dev->tag_success_count++;
1783 /*
1784 * Some devices deal with temporary internal resource
1785 * shortages by returning queue full. When the queue
1786 * full occurrs, we throttle back. Slowly try to get
1787 * back to our previous queue depth.
1788 */
1789 if ((dev->openings + dev->active) < dev->maxtags
1790 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1791 dev->tag_success_count = 0;
1792 dev->openings++;
1793 }
1794
1795 if (dev->active == 0)
1796 dev->commands_since_idle_or_otag = 0;
1797
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
Pekka Enberg48813cf2010-07-14 13:12:57 +03001799 printk("Recovery SCB completes\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1801 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1802 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
Christoph Hellwig8cac8142006-02-06 15:40:45 +01001803
1804 if (ahc->platform_data->eh_done)
1805 complete(ahc->platform_data->eh_done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 }
1807
1808 ahc_free_scb(ahc, scb);
1809 ahc_linux_queue_cmd_complete(ahc, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810}
1811
1812static void
1813ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001814 struct scsi_device *sdev, struct scb *scb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001815{
1816 struct ahc_devinfo devinfo;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001817 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818
1819 ahc_compile_devinfo(&devinfo,
1820 ahc->our_id,
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001821 sdev->sdev_target->id, sdev->lun,
1822 sdev->sdev_target->channel == 0 ? 'A' : 'B',
Linus Torvalds1da177e2005-04-16 15:20:36 -07001823 ROLE_INITIATOR);
1824
1825 /*
1826 * We don't currently trust the mid-layer to
1827 * properly deal with queue full or busy. So,
1828 * when one occurs, we tell the mid-layer to
1829 * unconditionally requeue the command to us
1830 * so that we can retry it ourselves. We also
1831 * implement our own throttling mechanism so
1832 * we don't clobber the device with too many
1833 * commands.
1834 */
1835 switch (ahc_get_scsi_status(scb)) {
1836 default:
1837 break;
1838 case SCSI_STATUS_CHECK_COND:
1839 case SCSI_STATUS_CMD_TERMINATED:
1840 {
Christoph Hellwig 013791e2005-05-16 18:52:39 +02001841 struct scsi_cmnd *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842
1843 /*
1844 * Copy sense information to the OS's cmd
1845 * structure if it is available.
1846 */
1847 cmd = scb->io_ctx;
1848 if (scb->flags & SCB_SENSE) {
1849 u_int sense_size;
1850
Amol Lad6d07cb72006-10-20 14:48:40 -07001851 sense_size = min(sizeof(struct scsi_sense_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852 - ahc_get_sense_residual(scb),
FUJITA Tomonorib80ca4f2008-01-13 15:46:13 +09001853 (u_long)SCSI_SENSE_BUFFERSIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 memcpy(cmd->sense_buffer,
1855 ahc_get_sense_buf(ahc, scb), sense_size);
FUJITA Tomonorib80ca4f2008-01-13 15:46:13 +09001856 if (sense_size < SCSI_SENSE_BUFFERSIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 memset(&cmd->sense_buffer[sense_size], 0,
FUJITA Tomonorib80ca4f2008-01-13 15:46:13 +09001858 SCSI_SENSE_BUFFERSIZE - sense_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 cmd->result |= (DRIVER_SENSE << 24);
1860#ifdef AHC_DEBUG
1861 if (ahc_debug & AHC_SHOW_SENSE) {
1862 int i;
1863
Pekka Enberg48813cf2010-07-14 13:12:57 +03001864 printk("Copied %d bytes of sense data:",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 sense_size);
1866 for (i = 0; i < sense_size; i++) {
1867 if ((i & 0xF) == 0)
Pekka Enberg48813cf2010-07-14 13:12:57 +03001868 printk("\n");
1869 printk("0x%x ", cmd->sense_buffer[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870 }
Pekka Enberg48813cf2010-07-14 13:12:57 +03001871 printk("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872 }
1873#endif
1874 }
1875 break;
1876 }
1877 case SCSI_STATUS_QUEUE_FULL:
1878 {
1879 /*
1880 * By the time the core driver has returned this
1881 * command, all other commands that were queued
1882 * to us but not the device have been returned.
1883 * This ensures that dev->active is equal to
1884 * the number of commands actually queued to
1885 * the device.
1886 */
1887 dev->tag_success_count = 0;
1888 if (dev->active != 0) {
1889 /*
1890 * Drop our opening count to the number
1891 * of commands currently outstanding.
1892 */
1893 dev->openings = 0;
1894/*
1895 ahc_print_path(ahc, scb);
Pekka Enberg48813cf2010-07-14 13:12:57 +03001896 printk("Dropping tag count to %d\n", dev->active);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897 */
1898 if (dev->active == dev->tags_on_last_queuefull) {
1899
1900 dev->last_queuefull_same_count++;
1901 /*
1902 * If we repeatedly see a queue full
1903 * at the same queue depth, this
1904 * device has a fixed number of tag
1905 * slots. Lock in this tag depth
1906 * so we stop seeing queue fulls from
1907 * this device.
1908 */
1909 if (dev->last_queuefull_same_count
1910 == AHC_LOCK_TAGS_COUNT) {
1911 dev->maxtags = dev->active;
1912 ahc_print_path(ahc, scb);
Pekka Enberg48813cf2010-07-14 13:12:57 +03001913 printk("Locking max tag count at %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 dev->active);
1915 }
1916 } else {
1917 dev->tags_on_last_queuefull = dev->active;
1918 dev->last_queuefull_same_count = 0;
1919 }
1920 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1921 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
Hannes Reinecke90800632006-10-23 15:25:36 +02001922 ahc_platform_set_tags(ahc, sdev, &devinfo,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 (dev->flags & AHC_DEV_Q_BASIC)
1924 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1925 break;
1926 }
1927 /*
1928 * Drop down to a single opening, and treat this
1929 * as if the target returned BUSY SCSI status.
1930 */
1931 dev->openings = 1;
1932 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
Hannes Reinecke90800632006-10-23 15:25:36 +02001933 ahc_platform_set_tags(ahc, sdev, &devinfo,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 (dev->flags & AHC_DEV_Q_BASIC)
1935 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 break;
1937 }
1938 }
1939}
1940
1941static void
Christoph Hellwig 013791e2005-05-16 18:52:39 +02001942ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943{
1944 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001945 * Map CAM error codes into Linux Error codes. We
1946 * avoid the conversion so that the DV code has the
1947 * full error information available when making
1948 * state change decisions.
1949 */
cb624022005-04-17 18:03:20 -05001950 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 u_int new_status;
1952
1953 switch (ahc_cmd_get_transaction_status(cmd)) {
1954 case CAM_REQ_INPROG:
1955 case CAM_REQ_CMP:
1956 case CAM_SCSI_STATUS_ERROR:
1957 new_status = DID_OK;
1958 break;
1959 case CAM_REQ_ABORTED:
1960 new_status = DID_ABORT;
1961 break;
1962 case CAM_BUSY:
1963 new_status = DID_BUS_BUSY;
1964 break;
1965 case CAM_REQ_INVALID:
1966 case CAM_PATH_INVALID:
1967 new_status = DID_BAD_TARGET;
1968 break;
1969 case CAM_SEL_TIMEOUT:
1970 new_status = DID_NO_CONNECT;
1971 break;
1972 case CAM_SCSI_BUS_RESET:
1973 case CAM_BDR_SENT:
1974 new_status = DID_RESET;
1975 break;
1976 case CAM_UNCOR_PARITY:
1977 new_status = DID_PARITY;
1978 break;
1979 case CAM_CMD_TIMEOUT:
1980 new_status = DID_TIME_OUT;
1981 break;
1982 case CAM_UA_ABORT:
1983 case CAM_REQ_CMP_ERR:
1984 case CAM_AUTOSENSE_FAIL:
1985 case CAM_NO_HBA:
1986 case CAM_DATA_RUN_ERR:
1987 case CAM_UNEXP_BUSFREE:
1988 case CAM_SEQUENCE_FAIL:
1989 case CAM_CCB_LEN_ERR:
1990 case CAM_PROVIDE_FAIL:
1991 case CAM_REQ_TERMIO:
1992 case CAM_UNREC_HBA_ERROR:
1993 case CAM_REQ_TOO_BIG:
1994 new_status = DID_ERROR;
1995 break;
1996 case CAM_REQUEUE_REQ:
James Bottomley 8e45ebc2005-05-17 00:06:08 -05001997 new_status = DID_REQUEUE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001998 break;
1999 default:
2000 /* We should never get here */
2001 new_status = DID_ERROR;
2002 break;
2003 }
2004
2005 ahc_cmd_set_transaction_status(cmd, new_status);
2006 }
2007
James Bottomley 8e45ebc2005-05-17 00:06:08 -05002008 cmd->scsi_done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009}
2010
2011static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012ahc_linux_freeze_simq(struct ahc_softc *ahc)
2013{
James Bottomleydacee842006-01-10 12:11:42 -06002014 unsigned long s;
2015
2016 ahc_lock(ahc, &s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017 ahc->platform_data->qfrozen++;
2018 if (ahc->platform_data->qfrozen == 1) {
2019 scsi_block_requests(ahc->platform_data->host);
2020
2021 /* XXX What about Twin channels? */
2022 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2023 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2024 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2025 }
James Bottomleydacee842006-01-10 12:11:42 -06002026 ahc_unlock(ahc, &s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027}
2028
2029static void
James Bottomleydacee842006-01-10 12:11:42 -06002030ahc_linux_release_simq(struct ahc_softc *ahc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002031{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032 u_long s;
2033 int unblock_reqs;
2034
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035 unblock_reqs = 0;
2036 ahc_lock(ahc, &s);
2037 if (ahc->platform_data->qfrozen > 0)
2038 ahc->platform_data->qfrozen--;
2039 if (ahc->platform_data->qfrozen == 0)
2040 unblock_reqs = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 ahc_unlock(ahc, &s);
2042 /*
2043 * There is still a race here. The mid-layer
2044 * should keep its own freeze count and use
2045 * a bottom half handler to run the queues
2046 * so we can unblock with our own lock held.
2047 */
2048 if (unblock_reqs)
2049 scsi_unblock_requests(ahc->platform_data->host);
2050}
2051
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052static int
Christoph Hellwig 013791e2005-05-16 18:52:39 +02002053ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002054{
2055 struct ahc_softc *ahc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056 struct ahc_linux_device *dev;
2057 struct scb *pending_scb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 u_int saved_scbptr;
2059 u_int active_scb_index;
2060 u_int last_phase;
2061 u_int saved_scsiid;
2062 u_int cdb_byte;
2063 int retval;
2064 int was_paused;
2065 int paused;
2066 int wait;
2067 int disconnected;
Christoph Hellwig6d5e9fd2005-10-31 20:03:48 +01002068 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069
2070 pending_scb = NULL;
2071 paused = FALSE;
2072 wait = FALSE;
2073 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002074
Jeff Garzik017560f2005-10-24 18:04:36 -04002075 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2077
Pekka Enberg48813cf2010-07-14 13:12:57 +03002078 printk("CDB:");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
Pekka Enberg48813cf2010-07-14 13:12:57 +03002080 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2081 printk("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082
Christoph Hellwig6d5e9fd2005-10-31 20:03:48 +01002083 ahc_lock(ahc, &flags);
Jeff Garzik 8fa728a2005-05-28 07:54:40 -04002084
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086 * First determine if we currently own this command.
2087 * Start by searching the device queue. If not found
2088 * there, check the pending_scb list. If not found
2089 * at all, and the system wanted us to just abort the
2090 * command, return success.
2091 */
James Bottomleyb1abb4d2005-05-24 17:15:43 -05002092 dev = scsi_transport_device_data(cmd->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093
2094 if (dev == NULL) {
2095 /*
2096 * No target device for this command exists,
2097 * so we must not still own the command.
2098 */
Pekka Enberg48813cf2010-07-14 13:12:57 +03002099 printk("%s:%d:%d:%d: Is not an active device\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100 ahc_name(ahc), cmd->device->channel, cmd->device->id,
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02002101 (u8)cmd->device->lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 retval = SUCCESS;
2103 goto no_cmd;
2104 }
2105
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2107 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2108 cmd->device->channel + 'A',
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02002109 (u8)cmd->device->lun,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
Pekka Enberg48813cf2010-07-14 13:12:57 +03002111 printk("%s:%d:%d:%d: Command found on untagged queue\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112 ahc_name(ahc), cmd->device->channel, cmd->device->id,
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02002113 (u8)cmd->device->lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002114 retval = SUCCESS;
2115 goto done;
2116 }
2117
2118 /*
2119 * See if we can find a matching cmd in the pending list.
2120 */
2121 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2122 if (pending_scb->io_ctx == cmd)
2123 break;
2124 }
2125
2126 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2127
2128 /* Any SCB for this device will do for a target reset */
2129 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
Jeff Garzik422c0d62005-10-24 18:05:09 -04002130 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2131 scmd_channel(cmd) + 'A',
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132 CAM_LUN_WILDCARD,
Vasily Averindce20062005-11-27 20:15:06 +03002133 SCB_LIST_NULL, ROLE_INITIATOR))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134 break;
2135 }
2136 }
2137
2138 if (pending_scb == NULL) {
Jeff Garzik017560f2005-10-24 18:04:36 -04002139 scmd_printk(KERN_INFO, cmd, "Command not found\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140 goto no_cmd;
2141 }
2142
2143 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2144 /*
2145 * We can't queue two recovery actions using the same SCB
2146 */
2147 retval = FAILED;
2148 goto done;
2149 }
2150
2151 /*
2152 * Ensure that the card doesn't do anything
2153 * behind our back and that we didn't "just" miss
2154 * an interrupt that would affect this cmd.
2155 */
2156 was_paused = ahc_is_paused(ahc);
2157 ahc_pause_and_flushwork(ahc);
2158 paused = TRUE;
2159
2160 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
Jeff Garzik017560f2005-10-24 18:04:36 -04002161 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002162 goto no_cmd;
2163 }
2164
Pekka Enberg48813cf2010-07-14 13:12:57 +03002165 printk("%s: At time of recovery, card was %spaused\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166 ahc_name(ahc), was_paused ? "" : "not ");
2167 ahc_dump_card_state(ahc);
2168
2169 disconnected = TRUE;
2170 if (flag == SCB_ABORT) {
2171 if (ahc_search_qinfifo(ahc, cmd->device->id,
2172 cmd->device->channel + 'A',
2173 cmd->device->lun,
2174 pending_scb->hscb->tag,
2175 ROLE_INITIATOR, CAM_REQ_ABORTED,
2176 SEARCH_COMPLETE) > 0) {
Pekka Enberg48813cf2010-07-14 13:12:57 +03002177 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002178 ahc_name(ahc), cmd->device->channel,
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02002179 cmd->device->id, (u8)cmd->device->lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002180 retval = SUCCESS;
2181 goto done;
2182 }
2183 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2184 cmd->device->channel + 'A',
Hannes Reinecke9cb78c12014-06-25 15:27:36 +02002185 cmd->device->lun,
2186 pending_scb->hscb->tag,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 ROLE_INITIATOR, /*status*/0,
2188 SEARCH_COUNT) > 0) {
2189 disconnected = FALSE;
2190 }
2191
2192 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2193 struct scb *bus_scb;
2194
2195 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2196 if (bus_scb == pending_scb)
2197 disconnected = FALSE;
2198 else if (flag != SCB_ABORT
2199 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2200 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2201 disconnected = FALSE;
2202 }
2203
2204 /*
2205 * At this point, pending_scb is the scb associated with the
2206 * passed in command. That command is currently active on the
2207 * bus, is in the disconnected state, or we're hoping to find
2208 * a command for the same target active on the bus to abuse to
2209 * send a BDR. Queue the appropriate message based on which of
2210 * these states we are in.
2211 */
2212 last_phase = ahc_inb(ahc, LASTPHASE);
2213 saved_scbptr = ahc_inb(ahc, SCBPTR);
2214 active_scb_index = ahc_inb(ahc, SCB_TAG);
2215 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2216 if (last_phase != P_BUSFREE
2217 && (pending_scb->hscb->tag == active_scb_index
2218 || (flag == SCB_DEVICE_RESET
Jeff Garzik422c0d62005-10-24 18:05:09 -04002219 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220
2221 /*
2222 * We're active on the bus, so assert ATN
2223 * and hope that the target responds.
2224 */
2225 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2226 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2227 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2228 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
Jeff Garzik017560f2005-10-24 18:04:36 -04002229 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002230 wait = TRUE;
2231 } else if (disconnected) {
2232
2233 /*
2234 * Actually re-queue this SCB in an attempt
2235 * to select the device before it reconnects.
2236 * In either case (selection or reselection),
2237 * we will now issue the approprate message
2238 * to the timed-out device.
2239 *
2240 * Set the MK_MESSAGE control bit indicating
2241 * that we desire to send a message. We
2242 * also set the disconnected flag since
2243 * in the paging case there is no guarantee
2244 * that our SCB control byte matches the
2245 * version on the card. We don't want the
2246 * sequencer to abort the command thinking
2247 * an unsolicited reselection occurred.
2248 */
2249 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2250 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2251
2252 /*
2253 * Remove any cached copy of this SCB in the
2254 * disconnected list in preparation for the
2255 * queuing of our abort SCB. We use the
2256 * same element in the SCB, SCB_NEXT, for
2257 * both the qinfifo and the disconnected list.
2258 */
2259 ahc_search_disc_list(ahc, cmd->device->id,
2260 cmd->device->channel + 'A',
2261 cmd->device->lun, pending_scb->hscb->tag,
2262 /*stop_on_first*/TRUE,
2263 /*remove*/TRUE,
2264 /*save_state*/FALSE);
2265
2266 /*
2267 * In the non-paging case, the sequencer will
2268 * never re-reference the in-core SCB.
2269 * To make sure we are notified during
Uwe Kleine-Königb71a8eb2009-10-06 12:42:51 +02002270 * reselection, set the MK_MESSAGE flag in
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271 * the card's copy of the SCB.
2272 */
2273 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2274 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2275 ahc_outb(ahc, SCB_CONTROL,
2276 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2277 }
2278
2279 /*
2280 * Clear out any entries in the QINFIFO first
2281 * so we are the next SCB for this target
2282 * to run.
2283 */
2284 ahc_search_qinfifo(ahc, cmd->device->id,
2285 cmd->device->channel + 'A',
2286 cmd->device->lun, SCB_LIST_NULL,
2287 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2288 SEARCH_COMPLETE);
2289 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2290 ahc_outb(ahc, SCBPTR, saved_scbptr);
2291 ahc_print_path(ahc, pending_scb);
Pekka Enberg48813cf2010-07-14 13:12:57 +03002292 printk("Device is disconnected, re-queuing SCB\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293 wait = TRUE;
2294 } else {
Jeff Garzik017560f2005-10-24 18:04:36 -04002295 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002296 retval = FAILED;
2297 goto done;
2298 }
2299
2300no_cmd:
2301 /*
2302 * Our assumption is that if we don't have the command, no
2303 * recovery action was required, so we return success. Again,
2304 * the semantics of the mid-layer recovery engine are not
2305 * well defined, so this may change in time.
2306 */
2307 retval = SUCCESS;
2308done:
2309 if (paused)
2310 ahc_unpause(ahc);
2311 if (wait) {
Peter Zijlstra6e9a4732006-09-30 23:28:10 -07002312 DECLARE_COMPLETION_ONSTACK(done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313
Christoph Hellwig8cac8142006-02-06 15:40:45 +01002314 ahc->platform_data->eh_done = &done;
Christoph Hellwig6d5e9fd2005-10-31 20:03:48 +01002315 ahc_unlock(ahc, &flags);
2316
Pekka Enberg48813cf2010-07-14 13:12:57 +03002317 printk("Recovery code sleeping\n");
Christoph Hellwig8cac8142006-02-06 15:40:45 +01002318 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2319 ahc_lock(ahc, &flags);
2320 ahc->platform_data->eh_done = NULL;
2321 ahc_unlock(ahc, &flags);
2322
Pekka Enberg48813cf2010-07-14 13:12:57 +03002323 printk("Timer Expired\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324 retval = FAILED;
2325 }
Pekka Enberg48813cf2010-07-14 13:12:57 +03002326 printk("Recovery code awake\n");
Christoph Hellwig6d5e9fd2005-10-31 20:03:48 +01002327 } else
2328 ahc_unlock(ahc, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329 return (retval);
2330}
2331
2332void
2333ahc_platform_dump_card_state(struct ahc_softc *ahc)
2334{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335}
2336
James Bottomley fad01ef2005-05-08 16:00:15 -05002337static void ahc_linux_set_width(struct scsi_target *starget, int width)
2338{
2339 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2340 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2341 struct ahc_devinfo devinfo;
2342 unsigned long flags;
2343
2344 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2345 starget->channel + 'A', ROLE_INITIATOR);
2346 ahc_lock(ahc, &flags);
2347 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2348 ahc_unlock(ahc, &flags);
2349}
2350
92d161c2005-04-17 16:59:33 -05002351static void ahc_linux_set_period(struct scsi_target *starget, int period)
2352{
2353 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2354 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2355 struct ahc_tmode_tstate *tstate;
2356 struct ahc_initiator_tinfo *tinfo
2357 = ahc_fetch_transinfo(ahc,
2358 starget->channel + 'A',
2359 shost->this_id, starget->id, &tstate);
2360 struct ahc_devinfo devinfo;
James Bottomley597487b2005-06-03 09:49:01 -05002361 unsigned int ppr_options = tinfo->goal.ppr_options;
92d161c2005-04-17 16:59:33 -05002362 unsigned long flags;
James Bottomley597487b2005-06-03 09:49:01 -05002363 unsigned long offset = tinfo->goal.offset;
Denys Vlasenkod1d7b192008-04-25 04:34:49 +02002364 const struct ahc_syncrate *syncrate;
92d161c2005-04-17 16:59:33 -05002365
2366 if (offset == 0)
2367 offset = MAX_OFFSET;
2368
James Bottomley2bf2c562005-05-19 21:30:13 -05002369 if (period < 9)
2370 period = 9; /* 12.5ns is our minimum */
James Bottomley0f82cb92007-07-26 17:13:10 -04002371 if (period == 9) {
2372 if (spi_max_width(starget))
2373 ppr_options |= MSG_EXT_PPR_DT_REQ;
2374 else
2375 /* need wide for DT and need DT for 12.5 ns */
2376 period = 10;
2377 }
James Bottomley2bf2c562005-05-19 21:30:13 -05002378
92d161c2005-04-17 16:59:33 -05002379 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2380 starget->channel + 'A', ROLE_INITIATOR);
James Bottomley fad01ef2005-05-08 16:00:15 -05002381
2382 /* all PPR requests apart from QAS require wide transfers */
2383 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
James Bottomley fad01ef2005-05-08 16:00:15 -05002384 if (spi_width(starget) == 0)
2385 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2386 }
2387
92d161c2005-04-17 16:59:33 -05002388 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2389 ahc_lock(ahc, &flags);
2390 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2391 ppr_options, AHC_TRANS_GOAL, FALSE);
2392 ahc_unlock(ahc, &flags);
2393}
2394
92d161c2005-04-17 16:59:33 -05002395static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2396{
2397 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2398 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2399 struct ahc_tmode_tstate *tstate;
2400 struct ahc_initiator_tinfo *tinfo
2401 = ahc_fetch_transinfo(ahc,
2402 starget->channel + 'A',
2403 shost->this_id, starget->id, &tstate);
2404 struct ahc_devinfo devinfo;
2405 unsigned int ppr_options = 0;
2406 unsigned int period = 0;
2407 unsigned long flags;
Denys Vlasenkod1d7b192008-04-25 04:34:49 +02002408 const struct ahc_syncrate *syncrate = NULL;
92d161c2005-04-17 16:59:33 -05002409
2410 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2411 starget->channel + 'A', ROLE_INITIATOR);
2412 if (offset != 0) {
2413 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
James Bottomley597487b2005-06-03 09:49:01 -05002414 period = tinfo->goal.period;
2415 ppr_options = tinfo->goal.ppr_options;
92d161c2005-04-17 16:59:33 -05002416 }
2417 ahc_lock(ahc, &flags);
2418 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2419 ppr_options, AHC_TRANS_GOAL, FALSE);
2420 ahc_unlock(ahc, &flags);
2421}
2422
92d161c2005-04-17 16:59:33 -05002423static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2424{
2425 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2426 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2427 struct ahc_tmode_tstate *tstate;
2428 struct ahc_initiator_tinfo *tinfo
2429 = ahc_fetch_transinfo(ahc,
2430 starget->channel + 'A',
2431 shost->this_id, starget->id, &tstate);
2432 struct ahc_devinfo devinfo;
James Bottomley597487b2005-06-03 09:49:01 -05002433 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c2005-04-17 16:59:33 -05002434 & ~MSG_EXT_PPR_DT_REQ;
James Bottomley597487b2005-06-03 09:49:01 -05002435 unsigned int period = tinfo->goal.period;
James Bottomley84e66ee2005-08-02 09:32:17 -05002436 unsigned int width = tinfo->goal.width;
92d161c2005-04-17 16:59:33 -05002437 unsigned long flags;
Denys Vlasenkod1d7b192008-04-25 04:34:49 +02002438 const struct ahc_syncrate *syncrate;
92d161c2005-04-17 16:59:33 -05002439
James Bottomley0f82cb92007-07-26 17:13:10 -04002440 if (dt && spi_max_width(starget)) {
James Bottomley2bf2c562005-05-19 21:30:13 -05002441 ppr_options |= MSG_EXT_PPR_DT_REQ;
James Bottomley84e66ee2005-08-02 09:32:17 -05002442 if (!width)
2443 ahc_linux_set_width(starget, 1);
2444 } else if (period == 9)
James Bottomley2bf2c562005-05-19 21:30:13 -05002445 period = 10; /* if resetting DT, period must be >= 25ns */
2446
92d161c2005-04-17 16:59:33 -05002447 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2448 starget->channel + 'A', ROLE_INITIATOR);
James Bottomley fad01ef2005-05-08 16:00:15 -05002449 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
92d161c2005-04-17 16:59:33 -05002450 ahc_lock(ahc, &flags);
James Bottomley597487b2005-06-03 09:49:01 -05002451 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c2005-04-17 16:59:33 -05002452 ppr_options, AHC_TRANS_GOAL, FALSE);
2453 ahc_unlock(ahc, &flags);
2454}
2455
James Bottomleyace4e712005-07-02 14:46:14 -05002456#if 0
2457/* FIXME: This code claims to support IU and QAS. However, the actual
2458 * sequencer code and aic7xxx_core have no support for these parameters and
2459 * will get into a bad state if they're negotiated. Do not enable this
2460 * unless you know what you're doing */
92d161c2005-04-17 16:59:33 -05002461static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2462{
2463 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2464 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2465 struct ahc_tmode_tstate *tstate;
2466 struct ahc_initiator_tinfo *tinfo
2467 = ahc_fetch_transinfo(ahc,
2468 starget->channel + 'A',
2469 shost->this_id, starget->id, &tstate);
2470 struct ahc_devinfo devinfo;
James Bottomley597487b2005-06-03 09:49:01 -05002471 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c2005-04-17 16:59:33 -05002472 & ~MSG_EXT_PPR_QAS_REQ;
James Bottomley597487b2005-06-03 09:49:01 -05002473 unsigned int period = tinfo->goal.period;
92d161c2005-04-17 16:59:33 -05002474 unsigned long flags;
2475 struct ahc_syncrate *syncrate;
2476
2477 if (qas)
2478 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2479
2480 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2481 starget->channel + 'A', ROLE_INITIATOR);
James Bottomley fad01ef2005-05-08 16:00:15 -05002482 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c2005-04-17 16:59:33 -05002483 ahc_lock(ahc, &flags);
James Bottomley597487b2005-06-03 09:49:01 -05002484 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c2005-04-17 16:59:33 -05002485 ppr_options, AHC_TRANS_GOAL, FALSE);
2486 ahc_unlock(ahc, &flags);
2487}
2488
92d161c2005-04-17 16:59:33 -05002489static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2490{
2491 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2492 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2493 struct ahc_tmode_tstate *tstate;
2494 struct ahc_initiator_tinfo *tinfo
2495 = ahc_fetch_transinfo(ahc,
2496 starget->channel + 'A',
2497 shost->this_id, starget->id, &tstate);
2498 struct ahc_devinfo devinfo;
James Bottomley597487b2005-06-03 09:49:01 -05002499 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c2005-04-17 16:59:33 -05002500 & ~MSG_EXT_PPR_IU_REQ;
James Bottomley597487b2005-06-03 09:49:01 -05002501 unsigned int period = tinfo->goal.period;
92d161c2005-04-17 16:59:33 -05002502 unsigned long flags;
2503 struct ahc_syncrate *syncrate;
2504
2505 if (iu)
2506 ppr_options |= MSG_EXT_PPR_IU_REQ;
2507
2508 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2509 starget->channel + 'A', ROLE_INITIATOR);
James Bottomley fad01ef2005-05-08 16:00:15 -05002510 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c2005-04-17 16:59:33 -05002511 ahc_lock(ahc, &flags);
James Bottomley597487b2005-06-03 09:49:01 -05002512 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c2005-04-17 16:59:33 -05002513 ppr_options, AHC_TRANS_GOAL, FALSE);
2514 ahc_unlock(ahc, &flags);
2515}
James Bottomleyace4e712005-07-02 14:46:14 -05002516#endif
92d161c2005-04-17 16:59:33 -05002517
James Bottomleyb2d8bfe2006-06-10 10:49:07 -05002518static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2519{
2520 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
Doug Ledfordcf2b5d32006-09-17 07:38:15 +02002521 unsigned long flags;
James Bottomley3e3c60e2006-09-06 09:04:40 -05002522 u8 mode;
James Bottomleyb2d8bfe2006-06-10 10:49:07 -05002523
James Bottomley3e3c60e2006-09-06 09:04:40 -05002524 if (!(ahc->features & AHC_ULTRA2)) {
2525 /* non-LVD chipset, may not have SBLKCTL reg */
James Bottomleyb2d8bfe2006-06-10 10:49:07 -05002526 spi_signalling(shost) =
2527 ahc->features & AHC_HVD ?
2528 SPI_SIGNAL_HVD :
2529 SPI_SIGNAL_SE;
James Bottomley3e3c60e2006-09-06 09:04:40 -05002530 return;
2531 }
2532
Doug Ledfordcf2b5d32006-09-17 07:38:15 +02002533 ahc_lock(ahc, &flags);
2534 ahc_pause(ahc);
James Bottomley3e3c60e2006-09-06 09:04:40 -05002535 mode = ahc_inb(ahc, SBLKCTL);
Doug Ledfordcf2b5d32006-09-17 07:38:15 +02002536 ahc_unpause(ahc);
2537 ahc_unlock(ahc, &flags);
James Bottomley3e3c60e2006-09-06 09:04:40 -05002538
2539 if (mode & ENAB40)
2540 spi_signalling(shost) = SPI_SIGNAL_LVD;
2541 else if (mode & ENAB20)
2542 spi_signalling(shost) = SPI_SIGNAL_SE;
James Bottomleyb2d8bfe2006-06-10 10:49:07 -05002543 else
2544 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2545}
2546
92d161c2005-04-17 16:59:33 -05002547static struct spi_function_template ahc_linux_transport_functions = {
92d161c2005-04-17 16:59:33 -05002548 .set_offset = ahc_linux_set_offset,
2549 .show_offset = 1,
92d161c2005-04-17 16:59:33 -05002550 .set_period = ahc_linux_set_period,
2551 .show_period = 1,
92d161c2005-04-17 16:59:33 -05002552 .set_width = ahc_linux_set_width,
2553 .show_width = 1,
92d161c2005-04-17 16:59:33 -05002554 .set_dt = ahc_linux_set_dt,
2555 .show_dt = 1,
James Bottomleyace4e712005-07-02 14:46:14 -05002556#if 0
92d161c2005-04-17 16:59:33 -05002557 .set_iu = ahc_linux_set_iu,
2558 .show_iu = 1,
92d161c2005-04-17 16:59:33 -05002559 .set_qas = ahc_linux_set_qas,
2560 .show_qas = 1,
James Bottomleyace4e712005-07-02 14:46:14 -05002561#endif
James Bottomleyb2d8bfe2006-06-10 10:49:07 -05002562 .get_signalling = ahc_linux_get_signalling,
92d161c2005-04-17 16:59:33 -05002563};
2564
2565
2566
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567static int __init
2568ahc_linux_init(void)
2569{
Christoph Hellwigdfd287f2005-06-28 16:49:44 +02002570 /*
2571 * If we've been passed any parameters, process them now.
2572 */
2573 if (aic7xxx)
2574 aic7xxx_setup(aic7xxx);
2575
2576 ahc_linux_transport_template =
2577 spi_attach_transport(&ahc_linux_transport_functions);
92d161c2005-04-17 16:59:33 -05002578 if (!ahc_linux_transport_template)
2579 return -ENODEV;
Christoph Hellwigdfd287f2005-06-28 16:49:44 +02002580
James Bottomleyb1abb4d2005-05-24 17:15:43 -05002581 scsi_transport_reserve_device(ahc_linux_transport_template,
2582 sizeof(struct ahc_linux_device));
Christoph Hellwigdfd287f2005-06-28 16:49:44 +02002583
Christoph Hellwigdfd287f2005-06-28 16:49:44 +02002584 ahc_linux_pci_init();
2585 ahc_linux_eisa_init();
2586 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002587}
2588
2589static void
2590ahc_linux_exit(void)
2591{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002592 ahc_linux_pci_exit();
2593 ahc_linux_eisa_exit();
92d161c2005-04-17 16:59:33 -05002594 spi_release_transport(ahc_linux_transport_template);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002595}
2596
2597module_init(ahc_linux_init);
2598module_exit(ahc_linux_exit);