blob: 876d1de8480d1388f0b740e40271ca9d21c2e2e2 [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 */
132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134/*
135 * Set this to the delay in seconds after SCSI bus reset.
136 * Note, we honor this only for the initial bus reset.
137 * The scsi error recovery code performs its own bus settle
138 * delay handling for error recovery actions.
139 */
140#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
141#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
142#else
143#define AIC7XXX_RESET_DELAY 5000
144#endif
145
146/*
147 * Control collection of SCSI transfer statistics for the /proc filesystem.
148 *
149 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
150 * NOTE: This does affect performance since it has to maintain statistics.
151 */
152#ifdef CONFIG_AIC7XXX_PROC_STATS
153#define AIC7XXX_PROC_STATS
154#endif
155
156/*
157 * To change the default number of tagged transactions allowed per-device,
158 * add a line to the lilo.conf file like:
159 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
160 * which will result in the first four devices on the first two
161 * controllers being set to a tagged queue depth of 32.
162 *
163 * The tag_commands is an array of 16 to allow for wide and twin adapters.
164 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
165 * for channel 1.
166 */
167typedef struct {
168 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
169} adapter_tag_info_t;
170
171/*
172 * Modify this as you see fit for your system.
173 *
174 * 0 tagged queuing disabled
175 * 1 <= n <= 253 n == max tags ever dispatched.
176 *
177 * The driver will throttle the number of commands dispatched to a
178 * device if it returns queue full. For devices with a fixed maximum
179 * queue depth, the driver will eventually determine this depth and
180 * lock it in (a console message is printed to indicate that a lock
181 * has occurred). On some devices, queue full is returned for a temporary
182 * resource shortage. These devices will return queue full at varying
183 * depths. The driver will throttle back when the queue fulls occur and
184 * attempt to slowly increase the depth over time as the device recovers
185 * from the resource shortage.
186 *
187 * In this example, the first line will disable tagged queueing for all
188 * the devices on the first probed aic7xxx adapter.
189 *
190 * The second line enables tagged queueing with 4 commands/LUN for IDs
191 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
192 * driver to attempt to use up to 64 tags for ID 1.
193 *
194 * The third line is the same as the first line.
195 *
196 * The fourth line disables tagged queueing for devices 0 and 3. It
197 * enables tagged queueing for the other IDs, with 16 commands/LUN
198 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
199 * IDs 2, 5-7, and 9-15.
200 */
201
202/*
203 * NOTE: The below structure is for reference only, the actual structure
204 * to modify in order to change things is just below this comment block.
205adapter_tag_info_t aic7xxx_tag_info[] =
206{
207 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
208 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
209 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
210 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
211};
212*/
213
214#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
215#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
216#else
217#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
218#endif
219
220#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
221 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
222 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
223 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
224 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
225 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
226 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
227 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
228 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
229}
230
231/*
232 * By default, use the number of commands specified by
233 * the users kernel configuration.
234 */
235static adapter_tag_info_t aic7xxx_tag_info[] =
236{
237 {AIC7XXX_CONFIGED_TAG_COMMANDS},
238 {AIC7XXX_CONFIGED_TAG_COMMANDS},
239 {AIC7XXX_CONFIGED_TAG_COMMANDS},
240 {AIC7XXX_CONFIGED_TAG_COMMANDS},
241 {AIC7XXX_CONFIGED_TAG_COMMANDS},
242 {AIC7XXX_CONFIGED_TAG_COMMANDS},
243 {AIC7XXX_CONFIGED_TAG_COMMANDS},
244 {AIC7XXX_CONFIGED_TAG_COMMANDS},
245 {AIC7XXX_CONFIGED_TAG_COMMANDS},
246 {AIC7XXX_CONFIGED_TAG_COMMANDS},
247 {AIC7XXX_CONFIGED_TAG_COMMANDS},
248 {AIC7XXX_CONFIGED_TAG_COMMANDS},
249 {AIC7XXX_CONFIGED_TAG_COMMANDS},
250 {AIC7XXX_CONFIGED_TAG_COMMANDS},
251 {AIC7XXX_CONFIGED_TAG_COMMANDS},
252 {AIC7XXX_CONFIGED_TAG_COMMANDS}
253};
254
255/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 * There should be a specific return value for this in scsi.h, but
257 * it seems that most drivers ignore it.
258 */
259#define DID_UNDERFLOW DID_ERROR
260
261void
262ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
263{
264 printk("(scsi%d:%c:%d:%d): ",
265 ahc->platform_data->host->host_no,
266 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
267 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
268 scb != NULL ? SCB_GET_LUN(scb) : -1);
269}
270
271/*
272 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
273 * cards in the system. This should be fixed. Exceptions to this
274 * rule are noted in the comments.
275 */
276
277/*
278 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
279 * has no effect on any later resets that might occur due to things like
280 * SCSI bus timeouts.
281 */
282static uint32_t aic7xxx_no_reset;
283
284/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 * Should we force EXTENDED translation on a controller.
286 * 0 == Use whatever is in the SEEPROM or default to off
287 * 1 == Use whatever is in the SEEPROM or default to on
288 */
289static uint32_t aic7xxx_extended;
290
291/*
292 * PCI bus parity checking of the Adaptec controllers. This is somewhat
293 * dubious at best. To my knowledge, this option has never actually
294 * solved a PCI parity problem, but on certain machines with broken PCI
295 * chipset configurations where stray PCI transactions with bad parity are
296 * the norm rather than the exception, the error messages can be overwelming.
297 * It's included in the driver for completeness.
298 * 0 = Shut off PCI parity check
299 * non-0 = reverse polarity pci parity checking
300 */
301static uint32_t aic7xxx_pci_parity = ~0;
302
303/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 * There are lots of broken chipsets in the world. Some of them will
305 * violate the PCI spec when we issue byte sized memory writes to our
306 * controller. I/O mapped register access, if allowed by the given
307 * platform, will work in almost all cases.
308 */
309uint32_t aic7xxx_allow_memio = ~0;
310
311/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 * So that we can set how long each device is given as a selection timeout.
313 * The table of values goes like this:
314 * 0 - 256ms
315 * 1 - 128ms
316 * 2 - 64ms
317 * 3 - 32ms
318 * We default to 256ms because some older devices need a longer time
319 * to respond to initial selection.
320 */
321static uint32_t aic7xxx_seltime;
322
323/*
324 * Certain devices do not perform any aging on commands. Should the
325 * device be saturated by commands in one portion of the disk, it is
326 * possible for transactions on far away sectors to never be serviced.
327 * To handle these devices, we can periodically send an ordered tag to
328 * force all outstanding transactions to be serviced prior to a new
329 * transaction.
330 */
331uint32_t aic7xxx_periodic_otag;
332
333/*
334 * Module information and settable options.
335 */
336static char *aic7xxx = NULL;
337
338MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
339MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
340MODULE_LICENSE("Dual BSD/GPL");
341MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
342module_param(aic7xxx, charp, 0444);
343MODULE_PARM_DESC(aic7xxx,
344"period delimited, options string.\n"
345" verbose Enable verbose/diagnostic logging\n"
346" allow_memio Allow device registers to be memory mapped\n"
347" debug Bitmask of debug values to enable\n"
348" no_probe Toggle EISA/VLB controller probing\n"
349" probe_eisa_vl Toggle EISA/VLB controller probing\n"
350" no_reset Supress initial bus resets\n"
351" extended Enable extended geometry on all controllers\n"
352" periodic_otag Send an ordered tagged transaction\n"
353" periodically to prevent tag starvation.\n"
354" This may be required by some older disk\n"
355" drives or RAID arrays.\n"
356" reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
357" tag_info:<tag_str> Set per-target tag depth\n"
358" global_tag_depth:<int> Global tag depth for every target\n"
359" on every bus\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360" seltime:<int> Selection Timeout\n"
361" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
362"\n"
363" Sample /etc/modprobe.conf line:\n"
364" Toggle EISA/VLB probing\n"
365" Set tag depth on Controller 1/Target 1 to 10 tags\n"
366" Shorten the selection timeout to 128ms\n"
367"\n"
368" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
369);
370
371static void ahc_linux_handle_scsi_status(struct ahc_softc *,
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500372 struct scsi_device *,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 struct scb *);
374static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200375 struct scsi_cmnd *cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376static void ahc_linux_sem_timeout(u_long arg);
377static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
378static void ahc_linux_release_simq(u_long arg);
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200379static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
382 struct ahc_devinfo *devinfo);
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500383static void ahc_linux_device_queue_depth(struct scsi_device *);
James Bottomley e4e360c2005-05-16 16:39:38 -0500384static int ahc_linux_run_command(struct ahc_softc*,
385 struct ahc_linux_device *,
386 struct scsi_cmnd *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387static void ahc_linux_setup_tag_info_global(char *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388static int aic7xxx_setup(char *s);
Christoph Hellwig2a403422005-06-28 16:50:40 +0200389
390static int ahc_linux_unit;
391
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
393/********************************* Inlines ************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
395
396static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
397 struct ahc_dma_seg *sg,
398 dma_addr_t addr, bus_size_t len);
399
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400static __inline void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
402{
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200403 struct scsi_cmnd *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
405 cmd = scb->io_ctx;
406 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
407 if (cmd->use_sg != 0) {
408 struct scatterlist *sg;
409
410 sg = (struct scatterlist *)cmd->request_buffer;
411 pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg,
be7db052005-04-17 15:26:13 -0500412 cmd->sc_data_direction);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 } else if (cmd->request_bufflen != 0) {
414 pci_unmap_single(ahc->dev_softc,
415 scb->platform_data->buf_busaddr,
416 cmd->request_bufflen,
be7db052005-04-17 15:26:13 -0500417 cmd->sc_data_direction);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 }
419}
420
421static __inline int
422ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
423 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
424{
425 int consumed;
426
427 if ((scb->sg_count + 1) > AHC_NSEG)
428 panic("Too few segs for dma mapping. "
429 "Increase AHC_NSEG\n");
430
431 consumed = 1;
432 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
433 scb->platform_data->xfer_len += len;
434
435 if (sizeof(dma_addr_t) > 4
436 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
437 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
438
439 sg->len = ahc_htole32(len);
440 return (consumed);
441}
442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 * Return a string describing the driver.
445 */
446static const char *
447ahc_linux_info(struct Scsi_Host *host)
448{
449 static char buffer[512];
450 char ahc_info[256];
451 char *bp;
452 struct ahc_softc *ahc;
453
454 bp = &buffer[0];
455 ahc = *(struct ahc_softc **)host->hostdata;
456 memset(bp, 0, sizeof(buffer));
457 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
458 strcat(bp, AIC7XXX_DRIVER_VERSION);
459 strcat(bp, "\n");
460 strcat(bp, " <");
461 strcat(bp, ahc->description);
462 strcat(bp, ">\n");
463 strcat(bp, " ");
464 ahc_controller_info(ahc, ahc_info);
465 strcat(bp, ahc_info);
466 strcat(bp, "\n");
467
468 return (bp);
469}
470
471/*
472 * Queue an SCB to the controller.
473 */
474static int
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200475ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476{
477 struct ahc_softc *ahc;
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500478 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
480 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
481
482 /*
483 * Save the callback on completion function.
484 */
485 cmd->scsi_done = scsi_done;
486
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 /*
488 * Close the race of a command that was in the process of
489 * being queued to us just as our simq was frozen. Let
490 * DV commands through so long as we are only frozen to
491 * perform DV.
492 */
James Bottomley e4e360c2005-05-16 16:39:38 -0500493 if (ahc->platform_data->qfrozen != 0)
494 return SCSI_MLQUEUE_HOST_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 cmd->result = CAM_REQ_INPROG << 16;
James Bottomley e4e360c2005-05-16 16:39:38 -0500497
498 return ahc_linux_run_command(ahc, dev, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499}
500
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500501static inline struct scsi_target **
502ahc_linux_target_in_softc(struct scsi_target *starget)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503{
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500504 struct ahc_softc *ahc =
505 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
James Bottomley fb3089d2005-05-17 21:09:52 -0500506 unsigned int target_offset;
James Bottomley c7525232005-05-17 18:07:34 -0500507
508 target_offset = starget->id;
509 if (starget->channel != 0)
510 target_offset += 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500512 return &ahc->platform_data->starget[target_offset];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513}
514
515static int
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500516ahc_linux_target_alloc(struct scsi_target *starget)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517{
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500518 struct ahc_softc *ahc =
519 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
520 struct seeprom_config *sc = ahc->seep_config;
521 unsigned long flags;
522 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
523 struct ahc_linux_target *targ = scsi_transport_target_data(starget);
524 unsigned short scsirate;
525 struct ahc_devinfo devinfo;
526 struct ahc_initiator_tinfo *tinfo;
527 struct ahc_tmode_tstate *tstate;
528 char channel = starget->channel + 'A';
529 unsigned int our_id = ahc->our_id;
530 unsigned int target_offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500532 target_offset = starget->id;
533 if (starget->channel != 0)
534 target_offset += 8;
535
536 if (starget->channel)
537 our_id = ahc->our_id_b;
James Bottomley c7525232005-05-17 18:07:34 -0500538
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500539 ahc_lock(ahc, &flags);
James Bottomley c7525232005-05-17 18:07:34 -0500540
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500541 BUG_ON(*ahc_targp != NULL);
cb624022005-04-17 18:03:20 -0500542
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500543 *ahc_targp = starget;
544 memset(targ, 0, sizeof(*targ));
545
546 if (sc) {
James Bottomley12021ff2005-06-13 20:58:56 -0500547 int maxsync = AHC_SYNCRATE_DT;
548 int ultra = 0;
549 int flags = sc->device_flags[target_offset];
550
551 if (ahc->flags & AHC_NEWEEPROM_FMT) {
552 if (flags & CFSYNCHISULTRA)
553 ultra = 1;
554 } else if (flags & CFULTRAEN)
555 ultra = 1;
556 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
557 * change it to ultra=0, CFXFER = 0 */
558 if(ultra && (flags & CFXFER) == 0x04) {
559 ultra = 0;
560 flags &= ~CFXFER;
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500561 }
James Bottomley12021ff2005-06-13 20:58:56 -0500562
563 if ((ahc->features & AHC_ULTRA2) != 0) {
564 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
565 } else {
566 scsirate = (flags & CFXFER) << 4;
567 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
568 AHC_SYNCRATE_FAST;
569 }
570 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
571 if (!(flags & CFSYNCH))
572 spi_max_offset(starget) = 0;
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500573 spi_min_period(starget) =
James Bottomley12021ff2005-06-13 20:58:56 -0500574 ahc_find_period(ahc, scsirate, maxsync);
575
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500576 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
577 starget->id, &tstate);
578 }
579 ahc_compile_devinfo(&devinfo, our_id, starget->id,
580 CAM_LUN_WILDCARD, channel,
581 ROLE_INITIATOR);
582 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
583 AHC_TRANS_GOAL, /*paused*/FALSE);
584 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
585 AHC_TRANS_GOAL, /*paused*/FALSE);
586 ahc_unlock(ahc, &flags);
cb624022005-04-17 18:03:20 -0500587
James Bottomley c7525232005-05-17 18:07:34 -0500588 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589}
590
591static void
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500592ahc_linux_target_destroy(struct scsi_target *starget)
593{
594 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
595
596 *ahc_targp = NULL;
597}
598
599static int
600ahc_linux_slave_alloc(struct scsi_device *sdev)
601{
602 struct ahc_softc *ahc =
603 *((struct ahc_softc **)sdev->host->hostdata);
604 struct scsi_target *starget = sdev->sdev_target;
605 struct ahc_linux_target *targ = scsi_transport_target_data(starget);
606 struct ahc_linux_device *dev;
607
608 if (bootverbose)
609 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
610
611 BUG_ON(targ->sdev[sdev->lun] != NULL);
612
613 dev = scsi_transport_device_data(sdev);
614 memset(dev, 0, sizeof(*dev));
615
616 /*
617 * We start out life using untagged
618 * transactions of which we allow one.
619 */
620 dev->openings = 1;
621
622 /*
623 * Set maxtags to 0. This will be changed if we
624 * later determine that we are dealing with
625 * a tagged queuing capable device.
626 */
627 dev->maxtags = 0;
628
629 targ->sdev[sdev->lun] = sdev;
630
James Bottomley79778a22005-08-04 17:33:22 -0500631 spi_period(starget) = 0;
632
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500633 return 0;
634}
635
636static int
637ahc_linux_slave_configure(struct scsi_device *sdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638{
639 struct ahc_softc *ahc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500641 ahc = *((struct ahc_softc **)sdev->host->hostdata);
642
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 if (bootverbose)
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500644 printf("%s: Slave Configure %d\n", ahc_name(ahc), sdev->id);
645
646 ahc_linux_device_queue_depth(sdev);
647
648 /* Initial Domain Validation */
649 if (!spi_initial_dv(sdev->sdev_target))
650 spi_dv_device(sdev);
651
652 return 0;
653}
654
655static void
656ahc_linux_slave_destroy(struct scsi_device *sdev)
657{
658 struct ahc_softc *ahc;
659 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
660 struct ahc_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
661
662 ahc = *((struct ahc_softc **)sdev->host->hostdata);
663 if (bootverbose)
664 printf("%s: Slave Destroy %d\n", ahc_name(ahc), sdev->id);
James Bottomley c7525232005-05-17 18:07:34 -0500665
666 BUG_ON(dev->active);
667
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500668 targ->sdev[sdev->lun] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670
671#if defined(__i386__)
672/*
673 * Return the disk geometry for the given SCSI device.
674 */
675static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
677 sector_t capacity, int geom[])
678{
679 uint8_t *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 int heads;
681 int sectors;
682 int cylinders;
683 int ret;
684 int extended;
685 struct ahc_softc *ahc;
686 u_int channel;
687
688 ahc = *((struct ahc_softc **)sdev->host->hostdata);
689 channel = sdev->channel;
690
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 bh = scsi_bios_ptable(bdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 if (bh) {
693 ret = scsi_partsize(bh, capacity,
694 &geom[2], &geom[0], &geom[1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 kfree(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 if (ret != -1)
697 return (ret);
698 }
699 heads = 64;
700 sectors = 32;
701 cylinders = aic_sector_div(capacity, heads, sectors);
702
703 if (aic7xxx_extended != 0)
704 extended = 1;
705 else if (channel == 0)
706 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
707 else
708 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
709 if (extended && cylinders >= 1024) {
710 heads = 255;
711 sectors = 63;
712 cylinders = aic_sector_div(capacity, heads, sectors);
713 }
714 geom[0] = heads;
715 geom[1] = sectors;
716 geom[2] = cylinders;
717 return (0);
718}
719#endif
720
721/*
722 * Abort the current SCSI command(s).
723 */
724static int
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200725ahc_linux_abort(struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726{
727 int error;
728
729 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
730 if (error != 0)
731 printf("aic7xxx_abort returns 0x%x\n", error);
732 return (error);
733}
734
735/*
736 * Attempt to send a target reset message to the device that timed out.
737 */
738static int
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200739ahc_linux_dev_reset(struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740{
741 int error;
742
743 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
744 if (error != 0)
745 printf("aic7xxx_dev_reset returns 0x%x\n", error);
746 return (error);
747}
748
749/*
750 * Reset the SCSI bus.
751 */
752static int
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200753ahc_linux_bus_reset(struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754{
755 struct ahc_softc *ahc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 int found;
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400757 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758
759 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400760
761 ahc_lock(ahc, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
763 /*initiate reset*/TRUE);
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400764 ahc_unlock(ahc, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765
766 if (bootverbose)
767 printf("%s: SCSI bus reset delivered. "
768 "%d SCBs aborted.\n", ahc_name(ahc), found);
769
770 return SUCCESS;
771}
772
Christoph Hellwig 013791e2005-05-16 18:52:39 +0200773struct scsi_host_template aic7xxx_driver_template = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 .module = THIS_MODULE,
775 .name = "aic7xxx",
Christoph Hellwigdfd287f2005-06-28 16:49:44 +0200776 .proc_name = "aic7xxx",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 .proc_info = ahc_linux_proc_info,
778 .info = ahc_linux_info,
779 .queuecommand = ahc_linux_queue,
780 .eh_abort_handler = ahc_linux_abort,
781 .eh_device_reset_handler = ahc_linux_dev_reset,
782 .eh_bus_reset_handler = ahc_linux_bus_reset,
783#if defined(__i386__)
784 .bios_param = ahc_linux_biosparam,
785#endif
786 .can_queue = AHC_MAX_QUEUE,
787 .this_id = -1,
788 .cmd_per_lun = 2,
789 .use_clustering = ENABLE_CLUSTERING,
790 .slave_alloc = ahc_linux_slave_alloc,
791 .slave_configure = ahc_linux_slave_configure,
792 .slave_destroy = ahc_linux_slave_destroy,
James Bottomleyb1abb4d2005-05-24 17:15:43 -0500793 .target_alloc = ahc_linux_target_alloc,
794 .target_destroy = ahc_linux_target_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795};
796
797/**************************** Tasklet Handler *********************************/
798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799/******************************** Macros **************************************/
800#define BUILD_SCSIID(ahc, cmd) \
801 ((((cmd)->device->id << TID_SHIFT) & TID) \
802 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
803 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
804
805/******************************** Bus DMA *************************************/
806int
807ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
808 bus_size_t alignment, bus_size_t boundary,
809 dma_addr_t lowaddr, dma_addr_t highaddr,
810 bus_dma_filter_t *filter, void *filterarg,
811 bus_size_t maxsize, int nsegments,
812 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
813{
814 bus_dma_tag_t dmat;
815
816 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
817 if (dmat == NULL)
818 return (ENOMEM);
819
820 /*
821 * Linux is very simplistic about DMA memory. For now don't
822 * maintain all specification information. Once Linux supplies
823 * better facilities for doing these operations, or the
824 * needs of this particular driver change, we might need to do
825 * more here.
826 */
827 dmat->alignment = alignment;
828 dmat->boundary = boundary;
829 dmat->maxsize = maxsize;
830 *ret_tag = dmat;
831 return (0);
832}
833
834void
835ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
836{
837 free(dmat, M_DEVBUF);
838}
839
840int
841ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
842 int flags, bus_dmamap_t *mapp)
843{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 *vaddr = pci_alloc_consistent(ahc->dev_softc,
Christoph Hellwig 7dfa0f22005-05-16 18:54:12 +0200845 dmat->maxsize, mapp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 if (*vaddr == NULL)
Christoph Hellwig 7dfa0f22005-05-16 18:54:12 +0200847 return ENOMEM;
848 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849}
850
851void
852ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
853 void* vaddr, bus_dmamap_t map)
854{
855 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
Christoph Hellwig 7dfa0f22005-05-16 18:54:12 +0200856 vaddr, map);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857}
858
859int
860ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
861 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
862 void *cb_arg, int flags)
863{
864 /*
865 * Assume for now that this will only be used during
866 * initialization and not for per-transaction buffer mapping.
867 */
868 bus_dma_segment_t stack_sg;
869
Christoph Hellwig 7dfa0f22005-05-16 18:54:12 +0200870 stack_sg.ds_addr = map;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 stack_sg.ds_len = dmat->maxsize;
872 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
873 return (0);
874}
875
876void
877ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
878{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879}
880
881int
882ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
883{
884 /* Nothing to do */
885 return (0);
886}
887
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888static void
889ahc_linux_setup_tag_info_global(char *p)
890{
891 int tags, i, j;
892
893 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
894 printf("Setting Global Tags= %d\n", tags);
895
896 for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
897 for (j = 0; j < AHC_NUM_TARGETS; j++) {
898 aic7xxx_tag_info[i].tag_commands[j] = tags;
899 }
900 }
901}
902
903static void
904ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
905{
906
907 if ((instance >= 0) && (targ >= 0)
908 && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
909 && (targ < AHC_NUM_TARGETS)) {
910 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
911 if (bootverbose)
912 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
913 }
914}
915
Christoph Hellwig1ff92732005-08-19 18:57:13 +0200916static char *
917ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
918 void (*callback)(u_long, int, int, int32_t),
919 u_long callback_arg)
920{
921 char *tok_end;
922 char *tok_end2;
923 int i;
924 int instance;
925 int targ;
926 int done;
927 char tok_list[] = {'.', ',', '{', '}', '\0'};
928
929 /* All options use a ':' name/arg separator */
930 if (*opt_arg != ':')
931 return (opt_arg);
932 opt_arg++;
933 instance = -1;
934 targ = -1;
935 done = FALSE;
936 /*
937 * Restore separator that may be in
938 * the middle of our option argument.
939 */
940 tok_end = strchr(opt_arg, '\0');
941 if (tok_end < end)
942 *tok_end = ',';
943 while (!done) {
944 switch (*opt_arg) {
945 case '{':
946 if (instance == -1) {
947 instance = 0;
948 } else {
949 if (depth > 1) {
950 if (targ == -1)
951 targ = 0;
952 } else {
953 printf("Malformed Option %s\n",
954 opt_name);
955 done = TRUE;
956 }
957 }
958 opt_arg++;
959 break;
960 case '}':
961 if (targ != -1)
962 targ = -1;
963 else if (instance != -1)
964 instance = -1;
965 opt_arg++;
966 break;
967 case ',':
968 case '.':
969 if (instance == -1)
970 done = TRUE;
971 else if (targ >= 0)
972 targ++;
973 else if (instance >= 0)
974 instance++;
975 opt_arg++;
976 break;
977 case '\0':
978 done = TRUE;
979 break;
980 default:
981 tok_end = end;
982 for (i = 0; tok_list[i]; i++) {
983 tok_end2 = strchr(opt_arg, tok_list[i]);
984 if ((tok_end2) && (tok_end2 < tok_end))
985 tok_end = tok_end2;
986 }
987 callback(callback_arg, instance, targ,
988 simple_strtol(opt_arg, NULL, 0));
989 opt_arg = tok_end;
990 break;
991 }
992 }
993 return (opt_arg);
994}
995
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996/*
997 * Handle Linux boot parameters. This routine allows for assigning a value
998 * to a parameter with a ':' between the parameter and the value.
999 * ie. aic7xxx=stpwlev:1,extended
1000 */
1001static int
1002aic7xxx_setup(char *s)
1003{
1004 int i, n;
1005 char *p;
1006 char *end;
1007
1008 static struct {
1009 const char *name;
1010 uint32_t *flag;
1011 } options[] = {
1012 { "extended", &aic7xxx_extended },
1013 { "no_reset", &aic7xxx_no_reset },
1014 { "verbose", &aic7xxx_verbose },
1015 { "allow_memio", &aic7xxx_allow_memio},
1016#ifdef AHC_DEBUG
1017 { "debug", &ahc_debug },
1018#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 { "periodic_otag", &aic7xxx_periodic_otag },
1020 { "pci_parity", &aic7xxx_pci_parity },
1021 { "seltime", &aic7xxx_seltime },
1022 { "tag_info", NULL },
1023 { "global_tag_depth", NULL },
1024 { "dv", NULL }
1025 };
1026
1027 end = strchr(s, '\0');
1028
1029 /*
1030 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1031 * will never be 0 in this case.
1032 */
1033 n = 0;
1034
1035 while ((p = strsep(&s, ",.")) != NULL) {
1036 if (*p == '\0')
1037 continue;
1038 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1039
1040 n = strlen(options[i].name);
1041 if (strncmp(options[i].name, p, n) == 0)
1042 break;
1043 }
1044 if (i == NUM_ELEMENTS(options))
1045 continue;
1046
1047 if (strncmp(p, "global_tag_depth", n) == 0) {
1048 ahc_linux_setup_tag_info_global(p + n);
1049 } else if (strncmp(p, "tag_info", n) == 0) {
Christoph Hellwig1ff92732005-08-19 18:57:13 +02001050 s = ahc_parse_brace_option("tag_info", p + n, end,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 2, ahc_linux_setup_tag_info, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 } else if (p[n] == ':') {
1053 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1054 } else if (strncmp(p, "verbose", n) == 0) {
1055 *(options[i].flag) = 1;
1056 } else {
1057 *(options[i].flag) ^= 0xFFFFFFFF;
1058 }
1059 }
1060 return 1;
1061}
1062
1063__setup("aic7xxx=", aic7xxx_setup);
1064
1065uint32_t aic7xxx_verbose;
1066
1067int
Christoph Hellwig 013791e2005-05-16 18:52:39 +02001068ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069{
1070 char buf[80];
1071 struct Scsi_Host *host;
1072 char *new_name;
1073 u_long s;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074
1075 template->name = ahc->description;
1076 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1077 if (host == NULL)
1078 return (ENOMEM);
1079
1080 *((struct ahc_softc **)host->hostdata) = ahc;
1081 ahc_lock(ahc, &s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 scsi_assign_lock(host, &ahc->platform_data->spin_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 ahc->platform_data->host = host;
1084 host->can_queue = AHC_MAX_QUEUE;
1085 host->cmd_per_lun = 2;
1086 /* XXX No way to communicate the ID for multiple channels */
1087 host->this_id = ahc->our_id;
1088 host->irq = ahc->platform_data->irq;
1089 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1090 host->max_lun = AHC_NUM_LUNS;
1091 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1092 host->sg_tablesize = AHC_NSEG;
Christoph Hellwig2a403422005-06-28 16:50:40 +02001093 ahc_set_unit(ahc, ahc_linux_unit++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 sprintf(buf, "scsi%d", host->host_no);
1095 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1096 if (new_name != NULL) {
1097 strcpy(new_name, buf);
1098 ahc_set_name(ahc, new_name);
1099 }
1100 host->unique_id = ahc->unit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 ahc_linux_initialize_scsi_bus(ahc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 ahc_intr_enable(ahc, TRUE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 ahc_unlock(ahc, &s);
1104
92d161c2005-04-17 16:59:33 -05001105 host->transportt = ahc_linux_transport_template;
1106
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
1108 scsi_scan_host(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 return (0);
1110}
1111
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 * Place the SCSI bus into a known state by either resetting it,
1114 * or forcing transfer negotiations on the next command to any
1115 * target.
1116 */
1117void
1118ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1119{
1120 int i;
1121 int numtarg;
1122
1123 i = 0;
1124 numtarg = 0;
1125
1126 if (aic7xxx_no_reset != 0)
1127 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1128
1129 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1130 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1131 else
1132 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1133
1134 if ((ahc->features & AHC_TWIN) != 0) {
1135
1136 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1137 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1138 } else {
1139 if (numtarg == 0)
1140 i = 8;
1141 numtarg += 8;
1142 }
1143 }
1144
1145 /*
1146 * Force negotiation to async for all targets that
1147 * will not see an initial bus reset.
1148 */
1149 for (; i < numtarg; i++) {
1150 struct ahc_devinfo devinfo;
1151 struct ahc_initiator_tinfo *tinfo;
1152 struct ahc_tmode_tstate *tstate;
1153 u_int our_id;
1154 u_int target_id;
1155 char channel;
1156
1157 channel = 'A';
1158 our_id = ahc->our_id;
1159 target_id = i;
1160 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1161 channel = 'B';
1162 our_id = ahc->our_id_b;
1163 target_id = i % 8;
1164 }
1165 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1166 target_id, &tstate);
1167 ahc_compile_devinfo(&devinfo, our_id, target_id,
1168 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1169 ahc_update_neg_request(ahc, &devinfo, tstate,
1170 tinfo, AHC_NEG_ALWAYS);
1171 }
1172 /* Give the bus some time to recover */
1173 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1174 ahc_linux_freeze_simq(ahc);
1175 init_timer(&ahc->platform_data->reset_timer);
1176 ahc->platform_data->reset_timer.data = (u_long)ahc;
1177 ahc->platform_data->reset_timer.expires =
1178 jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
1179 ahc->platform_data->reset_timer.function =
1180 ahc_linux_release_simq;
1181 add_timer(&ahc->platform_data->reset_timer);
1182 }
1183}
1184
1185int
1186ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1187{
1188
1189 ahc->platform_data =
1190 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1191 if (ahc->platform_data == NULL)
1192 return (ENOMEM);
1193 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 ahc_lockinit(ahc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1198 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1199 if (aic7xxx_pci_parity == 0)
1200 ahc->flags |= AHC_DISABLE_PCI_PERR;
1201
1202 return (0);
1203}
1204
1205void
1206ahc_platform_free(struct ahc_softc *ahc)
1207{
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001208 struct scsi_target *starget;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 int i, j;
1210
1211 if (ahc->platform_data != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 if (ahc->platform_data->host != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 scsi_remove_host(ahc->platform_data->host);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 scsi_host_put(ahc->platform_data->host);
1215 }
1216
1217 /* destroy all of the device and target objects */
1218 for (i = 0; i < AHC_NUM_TARGETS; i++) {
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001219 starget = ahc->platform_data->starget[i];
1220 if (starget != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221 for (j = 0; j < AHC_NUM_LUNS; j++) {
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001222 struct ahc_linux_target *targ =
1223 scsi_transport_target_data(starget);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001225 if (targ->sdev[j] == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 continue;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001227 targ->sdev[j] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 }
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001229 ahc->platform_data->starget[i] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 }
1231 }
1232
1233 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1234 free_irq(ahc->platform_data->irq, ahc);
1235 if (ahc->tag == BUS_SPACE_PIO
1236 && ahc->bsh.ioport != 0)
1237 release_region(ahc->bsh.ioport, 256);
1238 if (ahc->tag == BUS_SPACE_MEMIO
1239 && ahc->bsh.maddr != NULL) {
1240 iounmap(ahc->bsh.maddr);
1241 release_mem_region(ahc->platform_data->mem_busaddr,
1242 0x1000);
1243 }
Christoph Hellwig dedd8312005-05-16 18:52:06 +02001244
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 free(ahc->platform_data, M_DEVBUF);
1246 }
1247}
1248
1249void
1250ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1251{
1252 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1253 SCB_GET_CHANNEL(ahc, scb),
1254 SCB_GET_LUN(scb), SCB_LIST_NULL,
1255 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1256}
1257
1258void
1259ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1260 ahc_queue_alg alg)
1261{
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001262 struct scsi_target *starget;
1263 struct ahc_linux_target *targ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 struct ahc_linux_device *dev;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001265 struct scsi_device *sdev;
1266 u_int target_offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 int was_queuing;
1268 int now_queuing;
1269
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001270 target_offset = devinfo->target;
1271 if (devinfo->channel != 'A')
1272 target_offset += 8;
1273 starget = ahc->platform_data->starget[target_offset];
1274 targ = scsi_transport_target_data(starget);
1275 BUG_ON(targ == NULL);
1276 sdev = targ->sdev[devinfo->lun];
1277 if (sdev == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 return;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001279 dev = scsi_transport_device_data(sdev);
1280
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1282 switch (alg) {
1283 default:
1284 case AHC_QUEUE_NONE:
1285 now_queuing = 0;
1286 break;
1287 case AHC_QUEUE_BASIC:
1288 now_queuing = AHC_DEV_Q_BASIC;
1289 break;
1290 case AHC_QUEUE_TAGGED:
1291 now_queuing = AHC_DEV_Q_TAGGED;
1292 break;
1293 }
1294 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1295 && (was_queuing != now_queuing)
1296 && (dev->active != 0)) {
1297 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1298 dev->qfrozen++;
1299 }
1300
1301 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1302 if (now_queuing) {
1303 u_int usertags;
1304
1305 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1306 if (!was_queuing) {
1307 /*
1308 * Start out agressively and allow our
1309 * dynamic queue depth algorithm to take
1310 * care of the rest.
1311 */
1312 dev->maxtags = usertags;
1313 dev->openings = dev->maxtags - dev->active;
1314 }
1315 if (dev->maxtags == 0) {
1316 /*
1317 * Queueing is disabled by the user.
1318 */
1319 dev->openings = 1;
1320 } else if (alg == AHC_QUEUE_TAGGED) {
1321 dev->flags |= AHC_DEV_Q_TAGGED;
1322 if (aic7xxx_periodic_otag != 0)
1323 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1324 } else
1325 dev->flags |= AHC_DEV_Q_BASIC;
1326 } else {
1327 /* We can only have one opening. */
1328 dev->maxtags = 0;
1329 dev->openings = 1 - dev->active;
1330 }
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001331 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1332 case AHC_DEV_Q_BASIC:
James Bottomleyfdd0edf2005-08-04 13:28:40 -05001333 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
1334 scsi_activate_tcq(sdev, dev->openings + dev->active);
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001335 break;
1336 case AHC_DEV_Q_TAGGED:
James Bottomleyfdd0edf2005-08-04 13:28:40 -05001337 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
1338 scsi_activate_tcq(sdev, dev->openings + dev->active);
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001339 break;
1340 default:
1341 /*
1342 * We allow the OS to queue 2 untagged transactions to
1343 * us at any time even though we can only execute them
1344 * serially on the controller/device. This should
1345 * remove some latency.
1346 */
James Bottomleyfdd0edf2005-08-04 13:28:40 -05001347 scsi_deactivate_tcq(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) {
1367 if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
1368 if (warned_user == 0) {
1369
1370 printf(KERN_WARNING
1371"aic7xxx: WARNING: Insufficient tag_info instances\n"
1372"aic7xxx: for installed controllers. Using defaults\n"
1373"aic7xxx: Please update the aic7xxx_tag_info array in\n"
1374"aic7xxx: the aic7xxx_osm..c source file.\n");
1375 warned_user++;
1376 }
1377 tags = AHC_MAX_QUEUE;
1378 } else {
1379 adapter_tag_info_t *tag_info;
1380
1381 tag_info = &aic7xxx_tag_info[ahc->unit];
1382 tags = tag_info->tag_commands[devinfo->target_offset];
1383 if (tags > AHC_MAX_QUEUE)
1384 tags = AHC_MAX_QUEUE;
1385 }
1386 }
1387 return (tags);
1388}
1389
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
1409 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
1410 ahc_print_devinfo(ahc, &devinfo);
1411 printf("Tagged Queuing enabled. Depth %d\n", tags);
1412 } else {
1413 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
1414 }
1415}
1416
James Bottomley e4e360c2005-05-16 16:39:38 -05001417static int
1418ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1419 struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421 struct scb *scb;
1422 struct hardware_scb *hscb;
1423 struct ahc_initiator_tinfo *tinfo;
1424 struct ahc_tmode_tstate *tstate;
1425 uint16_t mask;
James Bottomley e4e360c2005-05-16 16:39:38 -05001426 struct scb_tailq *untagged_q = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427
James Bottomley e4e360c2005-05-16 16:39:38 -05001428 /*
1429 * Schedule us to run later. The only reason we are not
1430 * running is because the whole controller Q is frozen.
1431 */
1432 if (ahc->platform_data->qfrozen != 0)
1433 return SCSI_MLQUEUE_HOST_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434
James Bottomley e4e360c2005-05-16 16:39:38 -05001435 /*
1436 * We only allow one untagged transaction
1437 * per target in the initiator role unless
1438 * we are storing a full busy target *lun*
1439 * table in SCB space.
1440 */
1441 if (!blk_rq_tagged(cmd->request)
1442 && (ahc->features & AHC_SCB_BTT) == 0) {
1443 int target_offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444
James Bottomley e4e360c2005-05-16 16:39:38 -05001445 target_offset = cmd->device->id + cmd->device->channel * 8;
1446 untagged_q = &(ahc->untagged_queues[target_offset]);
1447 if (!TAILQ_EMPTY(untagged_q))
1448 /* if we're already executing an untagged command
1449 * we're busy to another */
1450 return SCSI_MLQUEUE_DEVICE_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451 }
James Bottomley e4e360c2005-05-16 16:39:38 -05001452
1453 /*
1454 * Get an scb to use.
1455 */
Christoph Hellwig8eb37942005-06-11 00:13:30 +02001456 scb = ahc_get_scb(ahc);
1457 if (!scb)
1458 return SCSI_MLQUEUE_HOST_BUSY;
James Bottomley e4e360c2005-05-16 16:39:38 -05001459
1460 scb->io_ctx = cmd;
1461 scb->platform_data->dev = dev;
1462 hscb = scb->hscb;
1463 cmd->host_scribble = (char *)scb;
1464
1465 /*
1466 * Fill out basics of the HSCB.
1467 */
1468 hscb->control = 0;
1469 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1470 hscb->lun = cmd->device->lun;
1471 mask = SCB_GET_TARGET_MASK(ahc, scb);
1472 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1473 SCB_GET_OUR_ID(scb),
1474 SCB_GET_TARGET(ahc, scb), &tstate);
1475 hscb->scsirate = tinfo->scsirate;
1476 hscb->scsioffset = tinfo->curr.offset;
1477 if ((tstate->ultraenb & mask) != 0)
1478 hscb->control |= ULTRAENB;
1479
1480 if ((ahc->user_discenable & mask) != 0)
1481 hscb->control |= DISCENB;
1482
1483 if ((tstate->auto_negotiate & mask) != 0) {
1484 scb->flags |= SCB_AUTO_NEGOTIATE;
1485 scb->hscb->control |= MK_MESSAGE;
1486 }
1487
1488 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
James Bottomley e4e360c2005-05-16 16:39:38 -05001489 int msg_bytes;
1490 uint8_t tag_msgs[2];
1491
1492 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1493 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1494 hscb->control |= tag_msgs[0];
1495 if (tag_msgs[0] == MSG_ORDERED_TASK)
1496 dev->commands_since_idle_or_otag = 0;
Christoph Hellwig dedd8312005-05-16 18:52:06 +02001497 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1498 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
James Bottomley e4e360c2005-05-16 16:39:38 -05001499 hscb->control |= MSG_ORDERED_TASK;
1500 dev->commands_since_idle_or_otag = 0;
1501 } else {
1502 hscb->control |= MSG_SIMPLE_TASK;
1503 }
1504 }
1505
1506 hscb->cdb_len = cmd->cmd_len;
1507 if (hscb->cdb_len <= 12) {
1508 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1509 } else {
1510 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1511 scb->flags |= SCB_CDB32_PTR;
1512 }
1513
1514 scb->platform_data->xfer_len = 0;
1515 ahc_set_residual(scb, 0);
1516 ahc_set_sense_residual(scb, 0);
1517 scb->sg_count = 0;
1518 if (cmd->use_sg != 0) {
1519 struct ahc_dma_seg *sg;
1520 struct scatterlist *cur_seg;
1521 struct scatterlist *end_seg;
1522 int nseg;
1523
1524 cur_seg = (struct scatterlist *)cmd->request_buffer;
1525 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
1526 cmd->sc_data_direction);
1527 end_seg = cur_seg + nseg;
1528 /* Copy the segments into the SG list. */
1529 sg = scb->sg_list;
1530 /*
1531 * The sg_count may be larger than nseg if
1532 * a transfer crosses a 32bit page.
1533 */
1534 while (cur_seg < end_seg) {
1535 dma_addr_t addr;
1536 bus_size_t len;
1537 int consumed;
1538
1539 addr = sg_dma_address(cur_seg);
1540 len = sg_dma_len(cur_seg);
1541 consumed = ahc_linux_map_seg(ahc, scb,
1542 sg, addr, len);
1543 sg += consumed;
1544 scb->sg_count += consumed;
1545 cur_seg++;
1546 }
1547 sg--;
1548 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1549
1550 /*
1551 * Reset the sg list pointer.
1552 */
1553 scb->hscb->sgptr =
1554 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1555
1556 /*
1557 * Copy the first SG into the "current"
1558 * data pointer area.
1559 */
1560 scb->hscb->dataptr = scb->sg_list->addr;
1561 scb->hscb->datacnt = scb->sg_list->len;
1562 } else if (cmd->request_bufflen != 0) {
1563 struct ahc_dma_seg *sg;
1564 dma_addr_t addr;
1565
1566 sg = scb->sg_list;
1567 addr = pci_map_single(ahc->dev_softc,
1568 cmd->request_buffer,
1569 cmd->request_bufflen,
1570 cmd->sc_data_direction);
1571 scb->platform_data->buf_busaddr = addr;
1572 scb->sg_count = ahc_linux_map_seg(ahc, scb,
1573 sg, addr,
1574 cmd->request_bufflen);
1575 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1576
1577 /*
1578 * Reset the sg list pointer.
1579 */
1580 scb->hscb->sgptr =
1581 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1582
1583 /*
1584 * Copy the first SG into the "current"
1585 * data pointer area.
1586 */
1587 scb->hscb->dataptr = sg->addr;
1588 scb->hscb->datacnt = sg->len;
1589 } else {
1590 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1591 scb->hscb->dataptr = 0;
1592 scb->hscb->datacnt = 0;
1593 scb->sg_count = 0;
1594 }
1595
1596 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1597 dev->openings--;
1598 dev->active++;
1599 dev->commands_issued++;
1600 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1601 dev->commands_since_idle_or_otag++;
1602
1603 scb->flags |= SCB_ACTIVE;
1604 if (untagged_q) {
1605 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1606 scb->flags |= SCB_UNTAGGEDQ;
1607 }
1608 ahc_queue_scb(ahc, scb);
1609 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610}
1611
1612/*
1613 * SCSI controller interrupt handler.
1614 */
1615irqreturn_t
1616ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1617{
1618 struct ahc_softc *ahc;
1619 u_long flags;
1620 int ours;
1621
1622 ahc = (struct ahc_softc *) dev_id;
1623 ahc_lock(ahc, &flags);
1624 ours = ahc_intr(ahc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625 ahc_unlock(ahc, &flags);
1626 return IRQ_RETVAL(ours);
1627}
1628
1629void
1630ahc_platform_flushwork(struct ahc_softc *ahc)
1631{
1632
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633}
1634
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635void
1636ahc_send_async(struct ahc_softc *ahc, char channel,
1637 u_int target, u_int lun, ac_code code, void *arg)
1638{
1639 switch (code) {
1640 case AC_TRANSFER_NEG:
1641 {
1642 char buf[80];
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001643 struct scsi_target *starget;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644 struct ahc_linux_target *targ;
1645 struct info_str info;
1646 struct ahc_initiator_tinfo *tinfo;
1647 struct ahc_tmode_tstate *tstate;
1648 int target_offset;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001649 unsigned int target_ppr_options;
1650
1651 BUG_ON(target == CAM_TARGET_WILDCARD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652
1653 info.buffer = buf;
1654 info.length = sizeof(buf);
1655 info.offset = 0;
1656 info.pos = 0;
1657 tinfo = ahc_fetch_transinfo(ahc, channel,
1658 channel == 'A' ? ahc->our_id
1659 : ahc->our_id_b,
1660 target, &tstate);
1661
1662 /*
1663 * Don't bother reporting results while
1664 * negotiations are still pending.
1665 */
1666 if (tinfo->curr.period != tinfo->goal.period
1667 || tinfo->curr.width != tinfo->goal.width
1668 || tinfo->curr.offset != tinfo->goal.offset
1669 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1670 if (bootverbose == 0)
1671 break;
1672
1673 /*
1674 * Don't bother reporting results that
1675 * are identical to those last reported.
1676 */
1677 target_offset = target;
1678 if (channel == 'B')
1679 target_offset += 8;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001680 starget = ahc->platform_data->starget[target_offset];
James Bottomleyfc789a92005-08-05 16:24:54 -05001681 if (starget == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 break;
James Bottomleyfc789a92005-08-05 16:24:54 -05001683 targ = scsi_transport_target_data(starget);
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001684
1685 target_ppr_options =
1686 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1687 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1688 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1689
1690 if (tinfo->curr.period == spi_period(starget)
1691 && tinfo->curr.width == spi_width(starget)
1692 && tinfo->curr.offset == spi_offset(starget)
1693 && tinfo->curr.ppr_options == target_ppr_options)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694 if (bootverbose == 0)
1695 break;
1696
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001697 spi_period(starget) = tinfo->curr.period;
1698 spi_width(starget) = tinfo->curr.width;
1699 spi_offset(starget) = tinfo->curr.offset;
James Bottomleyf7ff8982005-07-30 10:37:55 -05001700 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1701 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1702 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001703 spi_display_xfer_agreement(starget);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704 break;
1705 }
1706 case AC_SENT_BDR:
1707 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708 WARN_ON(lun != CAM_LUN_WILDCARD);
1709 scsi_report_device_reset(ahc->platform_data->host,
1710 channel - 'A', target);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711 break;
1712 }
1713 case AC_BUS_RESET:
1714 if (ahc->platform_data->host != NULL) {
1715 scsi_report_bus_reset(ahc->platform_data->host,
1716 channel - 'A');
1717 }
1718 break;
1719 default:
1720 panic("ahc_send_async: Unexpected async event");
1721 }
1722}
1723
1724/*
1725 * Calls the higher level scsi done function and frees the scb.
1726 */
1727void
1728ahc_done(struct ahc_softc *ahc, struct scb *scb)
1729{
Christoph Hellwig 013791e2005-05-16 18:52:39 +02001730 struct scsi_cmnd *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 struct ahc_linux_device *dev;
1732
1733 LIST_REMOVE(scb, pending_links);
1734 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1735 struct scb_tailq *untagged_q;
1736 int target_offset;
1737
1738 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1739 untagged_q = &(ahc->untagged_queues[target_offset]);
1740 TAILQ_REMOVE(untagged_q, scb, links.tqe);
James Bottomley e4e360c2005-05-16 16:39:38 -05001741 BUG_ON(!TAILQ_EMPTY(untagged_q));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742 }
1743
1744 if ((scb->flags & SCB_ACTIVE) == 0) {
1745 printf("SCB %d done'd twice\n", scb->hscb->tag);
1746 ahc_dump_card_state(ahc);
1747 panic("Stopping for safety");
1748 }
1749 cmd = scb->io_ctx;
1750 dev = scb->platform_data->dev;
1751 dev->active--;
1752 dev->openings++;
1753 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1754 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1755 dev->qfrozen--;
1756 }
1757 ahc_linux_unmap_scb(ahc, scb);
1758
1759 /*
1760 * Guard against stale sense data.
1761 * The Linux mid-layer assumes that sense
1762 * was retrieved anytime the first byte of
1763 * the sense buffer looks "sane".
1764 */
1765 cmd->sense_buffer[0] = 0;
1766 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1767 uint32_t amount_xferred;
1768
1769 amount_xferred =
1770 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1771 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1772#ifdef AHC_DEBUG
1773 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1774 ahc_print_path(ahc, scb);
1775 printf("Set CAM_UNCOR_PARITY\n");
1776 }
1777#endif
1778 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1779#ifdef AHC_REPORT_UNDERFLOWS
1780 /*
1781 * This code is disabled by default as some
1782 * clients of the SCSI system do not properly
1783 * initialize the underflow parameter. This
1784 * results in spurious termination of commands
1785 * that complete as expected (e.g. underflow is
1786 * allowed as command can return variable amounts
1787 * of data.
1788 */
1789 } else if (amount_xferred < scb->io_ctx->underflow) {
1790 u_int i;
1791
1792 ahc_print_path(ahc, scb);
1793 printf("CDB:");
1794 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1795 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1796 printf("\n");
1797 ahc_print_path(ahc, scb);
1798 printf("Saw underflow (%ld of %ld bytes). "
1799 "Treated as error\n",
1800 ahc_get_residual(scb),
1801 ahc_get_transfer_length(scb));
1802 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1803#endif
1804 } else {
1805 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1806 }
1807 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001808 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810
1811 if (dev->openings == 1
1812 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1813 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1814 dev->tag_success_count++;
1815 /*
1816 * Some devices deal with temporary internal resource
1817 * shortages by returning queue full. When the queue
1818 * full occurrs, we throttle back. Slowly try to get
1819 * back to our previous queue depth.
1820 */
1821 if ((dev->openings + dev->active) < dev->maxtags
1822 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1823 dev->tag_success_count = 0;
1824 dev->openings++;
1825 }
1826
1827 if (dev->active == 0)
1828 dev->commands_since_idle_or_otag = 0;
1829
Linus Torvalds1da177e2005-04-16 15:20:36 -07001830 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1831 printf("Recovery SCB completes\n");
1832 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1833 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1834 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1835 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
1836 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
1837 up(&ahc->platform_data->eh_sem);
1838 }
1839 }
1840
1841 ahc_free_scb(ahc, scb);
1842 ahc_linux_queue_cmd_complete(ahc, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843}
1844
1845static void
1846ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001847 struct scsi_device *sdev, struct scb *scb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848{
1849 struct ahc_devinfo devinfo;
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001850 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851
1852 ahc_compile_devinfo(&devinfo,
1853 ahc->our_id,
James Bottomleyb1abb4d2005-05-24 17:15:43 -05001854 sdev->sdev_target->id, sdev->lun,
1855 sdev->sdev_target->channel == 0 ? 'A' : 'B',
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856 ROLE_INITIATOR);
1857
1858 /*
1859 * We don't currently trust the mid-layer to
1860 * properly deal with queue full or busy. So,
1861 * when one occurs, we tell the mid-layer to
1862 * unconditionally requeue the command to us
1863 * so that we can retry it ourselves. We also
1864 * implement our own throttling mechanism so
1865 * we don't clobber the device with too many
1866 * commands.
1867 */
1868 switch (ahc_get_scsi_status(scb)) {
1869 default:
1870 break;
1871 case SCSI_STATUS_CHECK_COND:
1872 case SCSI_STATUS_CMD_TERMINATED:
1873 {
Christoph Hellwig 013791e2005-05-16 18:52:39 +02001874 struct scsi_cmnd *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875
1876 /*
1877 * Copy sense information to the OS's cmd
1878 * structure if it is available.
1879 */
1880 cmd = scb->io_ctx;
1881 if (scb->flags & SCB_SENSE) {
1882 u_int sense_size;
1883
1884 sense_size = MIN(sizeof(struct scsi_sense_data)
1885 - ahc_get_sense_residual(scb),
1886 sizeof(cmd->sense_buffer));
1887 memcpy(cmd->sense_buffer,
1888 ahc_get_sense_buf(ahc, scb), sense_size);
1889 if (sense_size < sizeof(cmd->sense_buffer))
1890 memset(&cmd->sense_buffer[sense_size], 0,
1891 sizeof(cmd->sense_buffer) - sense_size);
1892 cmd->result |= (DRIVER_SENSE << 24);
1893#ifdef AHC_DEBUG
1894 if (ahc_debug & AHC_SHOW_SENSE) {
1895 int i;
1896
1897 printf("Copied %d bytes of sense data:",
1898 sense_size);
1899 for (i = 0; i < sense_size; i++) {
1900 if ((i & 0xF) == 0)
1901 printf("\n");
1902 printf("0x%x ", cmd->sense_buffer[i]);
1903 }
1904 printf("\n");
1905 }
1906#endif
1907 }
1908 break;
1909 }
1910 case SCSI_STATUS_QUEUE_FULL:
1911 {
1912 /*
1913 * By the time the core driver has returned this
1914 * command, all other commands that were queued
1915 * to us but not the device have been returned.
1916 * This ensures that dev->active is equal to
1917 * the number of commands actually queued to
1918 * the device.
1919 */
1920 dev->tag_success_count = 0;
1921 if (dev->active != 0) {
1922 /*
1923 * Drop our opening count to the number
1924 * of commands currently outstanding.
1925 */
1926 dev->openings = 0;
1927/*
1928 ahc_print_path(ahc, scb);
1929 printf("Dropping tag count to %d\n", dev->active);
1930 */
1931 if (dev->active == dev->tags_on_last_queuefull) {
1932
1933 dev->last_queuefull_same_count++;
1934 /*
1935 * If we repeatedly see a queue full
1936 * at the same queue depth, this
1937 * device has a fixed number of tag
1938 * slots. Lock in this tag depth
1939 * so we stop seeing queue fulls from
1940 * this device.
1941 */
1942 if (dev->last_queuefull_same_count
1943 == AHC_LOCK_TAGS_COUNT) {
1944 dev->maxtags = dev->active;
1945 ahc_print_path(ahc, scb);
1946 printf("Locking max tag count at %d\n",
1947 dev->active);
1948 }
1949 } else {
1950 dev->tags_on_last_queuefull = dev->active;
1951 dev->last_queuefull_same_count = 0;
1952 }
1953 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1954 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
1955 ahc_platform_set_tags(ahc, &devinfo,
1956 (dev->flags & AHC_DEV_Q_BASIC)
1957 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1958 break;
1959 }
1960 /*
1961 * Drop down to a single opening, and treat this
1962 * as if the target returned BUSY SCSI status.
1963 */
1964 dev->openings = 1;
1965 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
1966 ahc_platform_set_tags(ahc, &devinfo,
1967 (dev->flags & AHC_DEV_Q_BASIC)
1968 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 break;
1970 }
1971 }
1972}
1973
1974static void
Christoph Hellwig 013791e2005-05-16 18:52:39 +02001975ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976{
1977 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978 * Map CAM error codes into Linux Error codes. We
1979 * avoid the conversion so that the DV code has the
1980 * full error information available when making
1981 * state change decisions.
1982 */
cb624022005-04-17 18:03:20 -05001983 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984 u_int new_status;
1985
1986 switch (ahc_cmd_get_transaction_status(cmd)) {
1987 case CAM_REQ_INPROG:
1988 case CAM_REQ_CMP:
1989 case CAM_SCSI_STATUS_ERROR:
1990 new_status = DID_OK;
1991 break;
1992 case CAM_REQ_ABORTED:
1993 new_status = DID_ABORT;
1994 break;
1995 case CAM_BUSY:
1996 new_status = DID_BUS_BUSY;
1997 break;
1998 case CAM_REQ_INVALID:
1999 case CAM_PATH_INVALID:
2000 new_status = DID_BAD_TARGET;
2001 break;
2002 case CAM_SEL_TIMEOUT:
2003 new_status = DID_NO_CONNECT;
2004 break;
2005 case CAM_SCSI_BUS_RESET:
2006 case CAM_BDR_SENT:
2007 new_status = DID_RESET;
2008 break;
2009 case CAM_UNCOR_PARITY:
2010 new_status = DID_PARITY;
2011 break;
2012 case CAM_CMD_TIMEOUT:
2013 new_status = DID_TIME_OUT;
2014 break;
2015 case CAM_UA_ABORT:
2016 case CAM_REQ_CMP_ERR:
2017 case CAM_AUTOSENSE_FAIL:
2018 case CAM_NO_HBA:
2019 case CAM_DATA_RUN_ERR:
2020 case CAM_UNEXP_BUSFREE:
2021 case CAM_SEQUENCE_FAIL:
2022 case CAM_CCB_LEN_ERR:
2023 case CAM_PROVIDE_FAIL:
2024 case CAM_REQ_TERMIO:
2025 case CAM_UNREC_HBA_ERROR:
2026 case CAM_REQ_TOO_BIG:
2027 new_status = DID_ERROR;
2028 break;
2029 case CAM_REQUEUE_REQ:
James Bottomley 8e45ebc2005-05-17 00:06:08 -05002030 new_status = DID_REQUEUE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002031 break;
2032 default:
2033 /* We should never get here */
2034 new_status = DID_ERROR;
2035 break;
2036 }
2037
2038 ahc_cmd_set_transaction_status(cmd, new_status);
2039 }
2040
James Bottomley 8e45ebc2005-05-17 00:06:08 -05002041 cmd->scsi_done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042}
2043
2044static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045ahc_linux_sem_timeout(u_long arg)
2046{
2047 struct ahc_softc *ahc;
2048 u_long s;
2049
2050 ahc = (struct ahc_softc *)arg;
2051
2052 ahc_lock(ahc, &s);
2053 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2054 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2055 up(&ahc->platform_data->eh_sem);
2056 }
2057 ahc_unlock(ahc, &s);
2058}
2059
2060static void
2061ahc_linux_freeze_simq(struct ahc_softc *ahc)
2062{
2063 ahc->platform_data->qfrozen++;
2064 if (ahc->platform_data->qfrozen == 1) {
2065 scsi_block_requests(ahc->platform_data->host);
2066
2067 /* XXX What about Twin channels? */
2068 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2069 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2070 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2071 }
2072}
2073
2074static void
2075ahc_linux_release_simq(u_long arg)
2076{
2077 struct ahc_softc *ahc;
2078 u_long s;
2079 int unblock_reqs;
2080
2081 ahc = (struct ahc_softc *)arg;
2082
2083 unblock_reqs = 0;
2084 ahc_lock(ahc, &s);
2085 if (ahc->platform_data->qfrozen > 0)
2086 ahc->platform_data->qfrozen--;
2087 if (ahc->platform_data->qfrozen == 0)
2088 unblock_reqs = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089 ahc_unlock(ahc, &s);
2090 /*
2091 * There is still a race here. The mid-layer
2092 * should keep its own freeze count and use
2093 * a bottom half handler to run the queues
2094 * so we can unblock with our own lock held.
2095 */
2096 if (unblock_reqs)
2097 scsi_unblock_requests(ahc->platform_data->host);
2098}
2099
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100static int
Christoph Hellwig 013791e2005-05-16 18:52:39 +02002101ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102{
2103 struct ahc_softc *ahc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104 struct ahc_linux_device *dev;
2105 struct scb *pending_scb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106 u_int saved_scbptr;
2107 u_int active_scb_index;
2108 u_int last_phase;
2109 u_int saved_scsiid;
2110 u_int cdb_byte;
2111 int retval;
2112 int was_paused;
2113 int paused;
2114 int wait;
2115 int disconnected;
2116
2117 pending_scb = NULL;
2118 paused = FALSE;
2119 wait = FALSE;
2120 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121
2122 printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
2123 ahc_name(ahc), cmd->device->channel,
2124 cmd->device->id, cmd->device->lun,
2125 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2126
2127 printf("CDB:");
2128 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2129 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2130 printf("\n");
2131
Jeff Garzik 8fa728a2005-05-28 07:54:40 -04002132 spin_lock_irq(&ahc->platform_data->spin_lock);
2133
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 * First determine if we currently own this command.
2136 * Start by searching the device queue. If not found
2137 * there, check the pending_scb list. If not found
2138 * at all, and the system wanted us to just abort the
2139 * command, return success.
2140 */
James Bottomleyb1abb4d2005-05-24 17:15:43 -05002141 dev = scsi_transport_device_data(cmd->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142
2143 if (dev == NULL) {
2144 /*
2145 * No target device for this command exists,
2146 * so we must not still own the command.
2147 */
2148 printf("%s:%d:%d:%d: Is not an active device\n",
2149 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2150 cmd->device->lun);
2151 retval = SUCCESS;
2152 goto no_cmd;
2153 }
2154
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2156 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2157 cmd->device->channel + 'A',
2158 cmd->device->lun,
2159 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2160 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2161 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2162 cmd->device->lun);
2163 retval = SUCCESS;
2164 goto done;
2165 }
2166
2167 /*
2168 * See if we can find a matching cmd in the pending list.
2169 */
2170 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2171 if (pending_scb->io_ctx == cmd)
2172 break;
2173 }
2174
2175 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2176
2177 /* Any SCB for this device will do for a target reset */
2178 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2179 if (ahc_match_scb(ahc, pending_scb, cmd->device->id,
2180 cmd->device->channel + 'A',
2181 CAM_LUN_WILDCARD,
2182 SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2183 break;
2184 }
2185 }
2186
2187 if (pending_scb == NULL) {
2188 printf("%s:%d:%d:%d: Command not found\n",
2189 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2190 cmd->device->lun);
2191 goto no_cmd;
2192 }
2193
2194 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2195 /*
2196 * We can't queue two recovery actions using the same SCB
2197 */
2198 retval = FAILED;
2199 goto done;
2200 }
2201
2202 /*
2203 * Ensure that the card doesn't do anything
2204 * behind our back and that we didn't "just" miss
2205 * an interrupt that would affect this cmd.
2206 */
2207 was_paused = ahc_is_paused(ahc);
2208 ahc_pause_and_flushwork(ahc);
2209 paused = TRUE;
2210
2211 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2212 printf("%s:%d:%d:%d: Command already completed\n",
2213 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2214 cmd->device->lun);
2215 goto no_cmd;
2216 }
2217
2218 printf("%s: At time of recovery, card was %spaused\n",
2219 ahc_name(ahc), was_paused ? "" : "not ");
2220 ahc_dump_card_state(ahc);
2221
2222 disconnected = TRUE;
2223 if (flag == SCB_ABORT) {
2224 if (ahc_search_qinfifo(ahc, cmd->device->id,
2225 cmd->device->channel + 'A',
2226 cmd->device->lun,
2227 pending_scb->hscb->tag,
2228 ROLE_INITIATOR, CAM_REQ_ABORTED,
2229 SEARCH_COMPLETE) > 0) {
2230 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2231 ahc_name(ahc), cmd->device->channel,
2232 cmd->device->id, cmd->device->lun);
2233 retval = SUCCESS;
2234 goto done;
2235 }
2236 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2237 cmd->device->channel + 'A',
2238 cmd->device->lun, pending_scb->hscb->tag,
2239 ROLE_INITIATOR, /*status*/0,
2240 SEARCH_COUNT) > 0) {
2241 disconnected = FALSE;
2242 }
2243
2244 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2245 struct scb *bus_scb;
2246
2247 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2248 if (bus_scb == pending_scb)
2249 disconnected = FALSE;
2250 else if (flag != SCB_ABORT
2251 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2252 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2253 disconnected = FALSE;
2254 }
2255
2256 /*
2257 * At this point, pending_scb is the scb associated with the
2258 * passed in command. That command is currently active on the
2259 * bus, is in the disconnected state, or we're hoping to find
2260 * a command for the same target active on the bus to abuse to
2261 * send a BDR. Queue the appropriate message based on which of
2262 * these states we are in.
2263 */
2264 last_phase = ahc_inb(ahc, LASTPHASE);
2265 saved_scbptr = ahc_inb(ahc, SCBPTR);
2266 active_scb_index = ahc_inb(ahc, SCB_TAG);
2267 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2268 if (last_phase != P_BUSFREE
2269 && (pending_scb->hscb->tag == active_scb_index
2270 || (flag == SCB_DEVICE_RESET
2271 && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) {
2272
2273 /*
2274 * We're active on the bus, so assert ATN
2275 * and hope that the target responds.
2276 */
2277 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2278 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2279 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2280 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2281 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
2282 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2283 cmd->device->lun);
2284 wait = TRUE;
2285 } else if (disconnected) {
2286
2287 /*
2288 * Actually re-queue this SCB in an attempt
2289 * to select the device before it reconnects.
2290 * In either case (selection or reselection),
2291 * we will now issue the approprate message
2292 * to the timed-out device.
2293 *
2294 * Set the MK_MESSAGE control bit indicating
2295 * that we desire to send a message. We
2296 * also set the disconnected flag since
2297 * in the paging case there is no guarantee
2298 * that our SCB control byte matches the
2299 * version on the card. We don't want the
2300 * sequencer to abort the command thinking
2301 * an unsolicited reselection occurred.
2302 */
2303 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2304 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2305
2306 /*
2307 * Remove any cached copy of this SCB in the
2308 * disconnected list in preparation for the
2309 * queuing of our abort SCB. We use the
2310 * same element in the SCB, SCB_NEXT, for
2311 * both the qinfifo and the disconnected list.
2312 */
2313 ahc_search_disc_list(ahc, cmd->device->id,
2314 cmd->device->channel + 'A',
2315 cmd->device->lun, pending_scb->hscb->tag,
2316 /*stop_on_first*/TRUE,
2317 /*remove*/TRUE,
2318 /*save_state*/FALSE);
2319
2320 /*
2321 * In the non-paging case, the sequencer will
2322 * never re-reference the in-core SCB.
2323 * To make sure we are notified during
2324 * reslection, set the MK_MESSAGE flag in
2325 * the card's copy of the SCB.
2326 */
2327 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2328 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2329 ahc_outb(ahc, SCB_CONTROL,
2330 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2331 }
2332
2333 /*
2334 * Clear out any entries in the QINFIFO first
2335 * so we are the next SCB for this target
2336 * to run.
2337 */
2338 ahc_search_qinfifo(ahc, cmd->device->id,
2339 cmd->device->channel + 'A',
2340 cmd->device->lun, SCB_LIST_NULL,
2341 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2342 SEARCH_COMPLETE);
2343 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2344 ahc_outb(ahc, SCBPTR, saved_scbptr);
2345 ahc_print_path(ahc, pending_scb);
2346 printf("Device is disconnected, re-queuing SCB\n");
2347 wait = TRUE;
2348 } else {
2349 printf("%s:%d:%d:%d: Unable to deliver message\n",
2350 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2351 cmd->device->lun);
2352 retval = FAILED;
2353 goto done;
2354 }
2355
2356no_cmd:
2357 /*
2358 * Our assumption is that if we don't have the command, no
2359 * recovery action was required, so we return success. Again,
2360 * the semantics of the mid-layer recovery engine are not
2361 * well defined, so this may change in time.
2362 */
2363 retval = SUCCESS;
2364done:
2365 if (paused)
2366 ahc_unpause(ahc);
2367 if (wait) {
2368 struct timer_list timer;
2369 int ret;
2370
2371 ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
2372 spin_unlock_irq(&ahc->platform_data->spin_lock);
2373 init_timer(&timer);
2374 timer.data = (u_long)ahc;
2375 timer.expires = jiffies + (5 * HZ);
2376 timer.function = ahc_linux_sem_timeout;
2377 add_timer(&timer);
2378 printf("Recovery code sleeping\n");
2379 down(&ahc->platform_data->eh_sem);
2380 printf("Recovery code awake\n");
2381 ret = del_timer_sync(&timer);
2382 if (ret == 0) {
2383 printf("Timer Expired\n");
2384 retval = FAILED;
2385 }
2386 spin_lock_irq(&ahc->platform_data->spin_lock);
2387 }
Jeff Garzik 8fa728a2005-05-28 07:54:40 -04002388
2389 spin_unlock_irq(&ahc->platform_data->spin_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390 return (retval);
2391}
2392
2393void
2394ahc_platform_dump_card_state(struct ahc_softc *ahc)
2395{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396}
2397
James Bottomley fad01ef2005-05-08 16:00:15 -05002398static void ahc_linux_set_width(struct scsi_target *starget, int width)
2399{
2400 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2401 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2402 struct ahc_devinfo devinfo;
2403 unsigned long flags;
2404
2405 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2406 starget->channel + 'A', ROLE_INITIATOR);
2407 ahc_lock(ahc, &flags);
2408 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2409 ahc_unlock(ahc, &flags);
2410}
2411
92d161c2005-04-17 16:59:33 -05002412static void ahc_linux_set_period(struct scsi_target *starget, int period)
2413{
2414 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2415 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2416 struct ahc_tmode_tstate *tstate;
2417 struct ahc_initiator_tinfo *tinfo
2418 = ahc_fetch_transinfo(ahc,
2419 starget->channel + 'A',
2420 shost->this_id, starget->id, &tstate);
2421 struct ahc_devinfo devinfo;
James Bottomley597487b2005-06-03 09:49:01 -05002422 unsigned int ppr_options = tinfo->goal.ppr_options;
92d161c2005-04-17 16:59:33 -05002423 unsigned long flags;
James Bottomley597487b2005-06-03 09:49:01 -05002424 unsigned long offset = tinfo->goal.offset;
92d161c2005-04-17 16:59:33 -05002425 struct ahc_syncrate *syncrate;
2426
2427 if (offset == 0)
2428 offset = MAX_OFFSET;
2429
James Bottomley2bf2c562005-05-19 21:30:13 -05002430 if (period < 9)
2431 period = 9; /* 12.5ns is our minimum */
2432 if (period == 9)
2433 ppr_options |= MSG_EXT_PPR_DT_REQ;
2434
92d161c2005-04-17 16:59:33 -05002435 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2436 starget->channel + 'A', ROLE_INITIATOR);
James Bottomley fad01ef2005-05-08 16:00:15 -05002437
2438 /* all PPR requests apart from QAS require wide transfers */
2439 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
James Bottomley fad01ef2005-05-08 16:00:15 -05002440 if (spi_width(starget) == 0)
2441 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2442 }
2443
92d161c2005-04-17 16:59:33 -05002444 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2445 ahc_lock(ahc, &flags);
2446 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2447 ppr_options, AHC_TRANS_GOAL, FALSE);
2448 ahc_unlock(ahc, &flags);
2449}
2450
92d161c2005-04-17 16:59:33 -05002451static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2452{
2453 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2454 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2455 struct ahc_tmode_tstate *tstate;
2456 struct ahc_initiator_tinfo *tinfo
2457 = ahc_fetch_transinfo(ahc,
2458 starget->channel + 'A',
2459 shost->this_id, starget->id, &tstate);
2460 struct ahc_devinfo devinfo;
2461 unsigned int ppr_options = 0;
2462 unsigned int period = 0;
2463 unsigned long flags;
2464 struct ahc_syncrate *syncrate = NULL;
2465
2466 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2467 starget->channel + 'A', ROLE_INITIATOR);
2468 if (offset != 0) {
2469 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
James Bottomley597487b2005-06-03 09:49:01 -05002470 period = tinfo->goal.period;
2471 ppr_options = tinfo->goal.ppr_options;
92d161c2005-04-17 16:59:33 -05002472 }
2473 ahc_lock(ahc, &flags);
2474 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2475 ppr_options, AHC_TRANS_GOAL, FALSE);
2476 ahc_unlock(ahc, &flags);
2477}
2478
92d161c2005-04-17 16:59:33 -05002479static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2480{
2481 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2482 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2483 struct ahc_tmode_tstate *tstate;
2484 struct ahc_initiator_tinfo *tinfo
2485 = ahc_fetch_transinfo(ahc,
2486 starget->channel + 'A',
2487 shost->this_id, starget->id, &tstate);
2488 struct ahc_devinfo devinfo;
James Bottomley597487b2005-06-03 09:49:01 -05002489 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c2005-04-17 16:59:33 -05002490 & ~MSG_EXT_PPR_DT_REQ;
James Bottomley597487b2005-06-03 09:49:01 -05002491 unsigned int period = tinfo->goal.period;
James Bottomley84e66ee2005-08-02 09:32:17 -05002492 unsigned int width = tinfo->goal.width;
92d161c2005-04-17 16:59:33 -05002493 unsigned long flags;
2494 struct ahc_syncrate *syncrate;
2495
James Bottomley2bf2c562005-05-19 21:30:13 -05002496 if (dt) {
James Bottomley2bf2c562005-05-19 21:30:13 -05002497 ppr_options |= MSG_EXT_PPR_DT_REQ;
James Bottomley84e66ee2005-08-02 09:32:17 -05002498 if (!width)
2499 ahc_linux_set_width(starget, 1);
2500 } else if (period == 9)
James Bottomley2bf2c562005-05-19 21:30:13 -05002501 period = 10; /* if resetting DT, period must be >= 25ns */
2502
92d161c2005-04-17 16:59:33 -05002503 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2504 starget->channel + 'A', ROLE_INITIATOR);
James Bottomley fad01ef2005-05-08 16:00:15 -05002505 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
92d161c2005-04-17 16:59:33 -05002506 ahc_lock(ahc, &flags);
James Bottomley597487b2005-06-03 09:49:01 -05002507 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c2005-04-17 16:59:33 -05002508 ppr_options, AHC_TRANS_GOAL, FALSE);
2509 ahc_unlock(ahc, &flags);
2510}
2511
James Bottomleyace4e712005-07-02 14:46:14 -05002512#if 0
2513/* FIXME: This code claims to support IU and QAS. However, the actual
2514 * sequencer code and aic7xxx_core have no support for these parameters and
2515 * will get into a bad state if they're negotiated. Do not enable this
2516 * unless you know what you're doing */
92d161c2005-04-17 16:59:33 -05002517static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2518{
2519 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2520 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2521 struct ahc_tmode_tstate *tstate;
2522 struct ahc_initiator_tinfo *tinfo
2523 = ahc_fetch_transinfo(ahc,
2524 starget->channel + 'A',
2525 shost->this_id, starget->id, &tstate);
2526 struct ahc_devinfo devinfo;
James Bottomley597487b2005-06-03 09:49:01 -05002527 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c2005-04-17 16:59:33 -05002528 & ~MSG_EXT_PPR_QAS_REQ;
James Bottomley597487b2005-06-03 09:49:01 -05002529 unsigned int period = tinfo->goal.period;
92d161c2005-04-17 16:59:33 -05002530 unsigned long flags;
2531 struct ahc_syncrate *syncrate;
2532
2533 if (qas)
2534 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2535
2536 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2537 starget->channel + 'A', ROLE_INITIATOR);
James Bottomley fad01ef2005-05-08 16:00:15 -05002538 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c2005-04-17 16:59:33 -05002539 ahc_lock(ahc, &flags);
James Bottomley597487b2005-06-03 09:49:01 -05002540 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c2005-04-17 16:59:33 -05002541 ppr_options, AHC_TRANS_GOAL, FALSE);
2542 ahc_unlock(ahc, &flags);
2543}
2544
92d161c2005-04-17 16:59:33 -05002545static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2546{
2547 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2548 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2549 struct ahc_tmode_tstate *tstate;
2550 struct ahc_initiator_tinfo *tinfo
2551 = ahc_fetch_transinfo(ahc,
2552 starget->channel + 'A',
2553 shost->this_id, starget->id, &tstate);
2554 struct ahc_devinfo devinfo;
James Bottomley597487b2005-06-03 09:49:01 -05002555 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c2005-04-17 16:59:33 -05002556 & ~MSG_EXT_PPR_IU_REQ;
James Bottomley597487b2005-06-03 09:49:01 -05002557 unsigned int period = tinfo->goal.period;
92d161c2005-04-17 16:59:33 -05002558 unsigned long flags;
2559 struct ahc_syncrate *syncrate;
2560
2561 if (iu)
2562 ppr_options |= MSG_EXT_PPR_IU_REQ;
2563
2564 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2565 starget->channel + 'A', ROLE_INITIATOR);
James Bottomley fad01ef2005-05-08 16:00:15 -05002566 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c2005-04-17 16:59:33 -05002567 ahc_lock(ahc, &flags);
James Bottomley597487b2005-06-03 09:49:01 -05002568 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c2005-04-17 16:59:33 -05002569 ppr_options, AHC_TRANS_GOAL, FALSE);
2570 ahc_unlock(ahc, &flags);
2571}
James Bottomleyace4e712005-07-02 14:46:14 -05002572#endif
92d161c2005-04-17 16:59:33 -05002573
2574static struct spi_function_template ahc_linux_transport_functions = {
92d161c2005-04-17 16:59:33 -05002575 .set_offset = ahc_linux_set_offset,
2576 .show_offset = 1,
92d161c2005-04-17 16:59:33 -05002577 .set_period = ahc_linux_set_period,
2578 .show_period = 1,
92d161c2005-04-17 16:59:33 -05002579 .set_width = ahc_linux_set_width,
2580 .show_width = 1,
92d161c2005-04-17 16:59:33 -05002581 .set_dt = ahc_linux_set_dt,
2582 .show_dt = 1,
James Bottomleyace4e712005-07-02 14:46:14 -05002583#if 0
92d161c2005-04-17 16:59:33 -05002584 .set_iu = ahc_linux_set_iu,
2585 .show_iu = 1,
92d161c2005-04-17 16:59:33 -05002586 .set_qas = ahc_linux_set_qas,
2587 .show_qas = 1,
James Bottomleyace4e712005-07-02 14:46:14 -05002588#endif
92d161c2005-04-17 16:59:33 -05002589};
2590
2591
2592
Linus Torvalds1da177e2005-04-16 15:20:36 -07002593static int __init
2594ahc_linux_init(void)
2595{
Christoph Hellwigdfd287f2005-06-28 16:49:44 +02002596 /*
2597 * If we've been passed any parameters, process them now.
2598 */
2599 if (aic7xxx)
2600 aic7xxx_setup(aic7xxx);
2601
2602 ahc_linux_transport_template =
2603 spi_attach_transport(&ahc_linux_transport_functions);
92d161c2005-04-17 16:59:33 -05002604 if (!ahc_linux_transport_template)
2605 return -ENODEV;
Christoph Hellwigdfd287f2005-06-28 16:49:44 +02002606
James Bottomleyb1abb4d2005-05-24 17:15:43 -05002607 scsi_transport_reserve_target(ahc_linux_transport_template,
2608 sizeof(struct ahc_linux_target));
2609 scsi_transport_reserve_device(ahc_linux_transport_template,
2610 sizeof(struct ahc_linux_device));
Christoph Hellwigdfd287f2005-06-28 16:49:44 +02002611
Christoph Hellwigdfd287f2005-06-28 16:49:44 +02002612 ahc_linux_pci_init();
2613 ahc_linux_eisa_init();
2614 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002615}
2616
2617static void
2618ahc_linux_exit(void)
2619{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002620 ahc_linux_pci_exit();
2621 ahc_linux_eisa_exit();
92d161c2005-04-17 16:59:33 -05002622 spi_release_transport(ahc_linux_transport_template);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002623}
2624
2625module_init(ahc_linux_init);
2626module_exit(ahc_linux_exit);