blob: 1c8f872e2dd41be16151067ebfb9553a6a6c6ab9 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Adaptec AIC79xx device driver for Linux.
3 *
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
5 *
6 * --------------------------------------------------------------------------
7 * Copyright (c) 1994-2000 Justin T. Gibbs.
8 * Copyright (c) 1997-1999 Doug Ledford
9 * Copyright (c) 2000-2003 Adaptec Inc.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45#include "aic79xx_osm.h"
46#include "aic79xx_inline.h"
47#include <scsi/scsicam.h>
48
Hannes Reinecke73a25462005-07-22 16:44:04 +020049static struct scsi_transport_template *ahd_linux_transport_template = NULL;
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <linux/init.h> /* __setup */
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#include <linux/mm.h> /* For fetching system memory size */
Hannes Reinecke73a25462005-07-22 16:44:04 +020053#include <linux/blkdev.h> /* For block_size() */
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#include <linux/delay.h> /* For ssleep/msleep */
Jeff Garzik017560f2005-10-24 18:04:36 -040055#include <linux/device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 * Bucket size for counting good commands in between bad ones.
59 */
60#define AHD_LINUX_ERR_THRESH 1000
61
62/*
63 * Set this to the delay in seconds after SCSI bus reset.
64 * Note, we honor this only for the initial bus reset.
65 * The scsi error recovery code performs its own bus settle
66 * delay handling for error recovery actions.
67 */
68#ifdef CONFIG_AIC79XX_RESET_DELAY_MS
69#define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
70#else
71#define AIC79XX_RESET_DELAY 5000
72#endif
73
74/*
75 * To change the default number of tagged transactions allowed per-device,
76 * add a line to the lilo.conf file like:
77 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
78 * which will result in the first four devices on the first two
79 * controllers being set to a tagged queue depth of 32.
80 *
81 * The tag_commands is an array of 16 to allow for wide and twin adapters.
82 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
83 * for channel 1.
84 */
85typedef struct {
86 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
87} adapter_tag_info_t;
88
89/*
90 * Modify this as you see fit for your system.
91 *
92 * 0 tagged queuing disabled
93 * 1 <= n <= 253 n == max tags ever dispatched.
94 *
95 * The driver will throttle the number of commands dispatched to a
96 * device if it returns queue full. For devices with a fixed maximum
97 * queue depth, the driver will eventually determine this depth and
98 * lock it in (a console message is printed to indicate that a lock
99 * has occurred). On some devices, queue full is returned for a temporary
100 * resource shortage. These devices will return queue full at varying
101 * depths. The driver will throttle back when the queue fulls occur and
102 * attempt to slowly increase the depth over time as the device recovers
103 * from the resource shortage.
104 *
105 * In this example, the first line will disable tagged queueing for all
106 * the devices on the first probed aic79xx adapter.
107 *
108 * The second line enables tagged queueing with 4 commands/LUN for IDs
109 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
110 * driver to attempt to use up to 64 tags for ID 1.
111 *
112 * The third line is the same as the first line.
113 *
114 * The fourth line disables tagged queueing for devices 0 and 3. It
115 * enables tagged queueing for the other IDs, with 16 commands/LUN
116 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
117 * IDs 2, 5-7, and 9-15.
118 */
119
120/*
121 * NOTE: The below structure is for reference only, the actual structure
122 * to modify in order to change things is just below this comment block.
123adapter_tag_info_t aic79xx_tag_info[] =
124{
125 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
126 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
127 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
128 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
129};
130*/
131
132#ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
133#define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
134#else
135#define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
136#endif
137
138#define AIC79XX_CONFIGED_TAG_COMMANDS { \
139 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
147}
148
149/*
150 * By default, use the number of commands specified by
151 * the users kernel configuration.
152 */
153static adapter_tag_info_t aic79xx_tag_info[] =
154{
155 {AIC79XX_CONFIGED_TAG_COMMANDS},
156 {AIC79XX_CONFIGED_TAG_COMMANDS},
157 {AIC79XX_CONFIGED_TAG_COMMANDS},
158 {AIC79XX_CONFIGED_TAG_COMMANDS},
159 {AIC79XX_CONFIGED_TAG_COMMANDS},
160 {AIC79XX_CONFIGED_TAG_COMMANDS},
161 {AIC79XX_CONFIGED_TAG_COMMANDS},
162 {AIC79XX_CONFIGED_TAG_COMMANDS},
163 {AIC79XX_CONFIGED_TAG_COMMANDS},
164 {AIC79XX_CONFIGED_TAG_COMMANDS},
165 {AIC79XX_CONFIGED_TAG_COMMANDS},
166 {AIC79XX_CONFIGED_TAG_COMMANDS},
167 {AIC79XX_CONFIGED_TAG_COMMANDS},
168 {AIC79XX_CONFIGED_TAG_COMMANDS},
169 {AIC79XX_CONFIGED_TAG_COMMANDS},
170 {AIC79XX_CONFIGED_TAG_COMMANDS}
171};
172
173/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 * The I/O cell on the chip is very configurable in respect to its analog
175 * characteristics. Set the defaults here; they can be overriden with
176 * the proper insmod parameters.
177 */
178struct ahd_linux_iocell_opts
179{
180 uint8_t precomp;
181 uint8_t slewrate;
182 uint8_t amplitude;
183};
184#define AIC79XX_DEFAULT_PRECOMP 0xFF
185#define AIC79XX_DEFAULT_SLEWRATE 0xFF
186#define AIC79XX_DEFAULT_AMPLITUDE 0xFF
187#define AIC79XX_DEFAULT_IOOPTS \
188{ \
189 AIC79XX_DEFAULT_PRECOMP, \
190 AIC79XX_DEFAULT_SLEWRATE, \
191 AIC79XX_DEFAULT_AMPLITUDE \
192}
193#define AIC79XX_PRECOMP_INDEX 0
194#define AIC79XX_SLEWRATE_INDEX 1
195#define AIC79XX_AMPLITUDE_INDEX 2
196static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
197{
198 AIC79XX_DEFAULT_IOOPTS,
199 AIC79XX_DEFAULT_IOOPTS,
200 AIC79XX_DEFAULT_IOOPTS,
201 AIC79XX_DEFAULT_IOOPTS,
202 AIC79XX_DEFAULT_IOOPTS,
203 AIC79XX_DEFAULT_IOOPTS,
204 AIC79XX_DEFAULT_IOOPTS,
205 AIC79XX_DEFAULT_IOOPTS,
206 AIC79XX_DEFAULT_IOOPTS,
207 AIC79XX_DEFAULT_IOOPTS,
208 AIC79XX_DEFAULT_IOOPTS,
209 AIC79XX_DEFAULT_IOOPTS,
210 AIC79XX_DEFAULT_IOOPTS,
211 AIC79XX_DEFAULT_IOOPTS,
212 AIC79XX_DEFAULT_IOOPTS,
213 AIC79XX_DEFAULT_IOOPTS
214};
215
216/*
217 * There should be a specific return value for this in scsi.h, but
218 * it seems that most drivers ignore it.
219 */
220#define DID_UNDERFLOW DID_ERROR
221
222void
223ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
224{
225 printk("(scsi%d:%c:%d:%d): ",
226 ahd->platform_data->host->host_no,
227 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
228 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
229 scb != NULL ? SCB_GET_LUN(scb) : -1);
230}
231
232/*
233 * XXX - these options apply unilaterally to _all_ adapters
234 * cards in the system. This should be fixed. Exceptions to this
235 * rule are noted in the comments.
236 */
237
238/*
239 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
240 * has no effect on any later resets that might occur due to things like
241 * SCSI bus timeouts.
242 */
243static uint32_t aic79xx_no_reset;
244
245/*
246 * Certain PCI motherboards will scan PCI devices from highest to lowest,
247 * others scan from lowest to highest, and they tend to do all kinds of
248 * strange things when they come into contact with PCI bridge chips. The
249 * net result of all this is that the PCI card that is actually used to boot
250 * the machine is very hard to detect. Most motherboards go from lowest
251 * PCI slot number to highest, and the first SCSI controller found is the
252 * one you boot from. The only exceptions to this are when a controller
253 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
254 * from lowest PCI slot number to highest PCI slot number. We also force
255 * all controllers with their BIOS disabled to the end of the list. This
256 * works on *almost* all computers. Where it doesn't work, we have this
257 * option. Setting this option to non-0 will reverse the order of the sort
258 * to highest first, then lowest, but will still leave cards with their BIOS
259 * disabled at the very end. That should fix everyone up unless there are
260 * really strange cirumstances.
261 */
262static uint32_t aic79xx_reverse_scan;
263
264/*
265 * Should we force EXTENDED translation on a controller.
266 * 0 == Use whatever is in the SEEPROM or default to off
267 * 1 == Use whatever is in the SEEPROM or default to on
268 */
269static uint32_t aic79xx_extended;
270
271/*
272 * PCI bus parity checking of the Adaptec controllers. This is somewhat
273 * dubious at best. To my knowledge, this option has never actually
274 * solved a PCI parity problem, but on certain machines with broken PCI
275 * chipset configurations, it can generate tons of false error messages.
276 * It's included in the driver for completeness.
277 * 0 = Shut off PCI parity check
278 * non-0 = Enable PCI parity check
279 *
280 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
281 * variable to -1 you would actually want to simply pass the variable
282 * name without a number. That will invert the 0 which will result in
283 * -1.
284 */
285static uint32_t aic79xx_pci_parity = ~0;
286
287/*
288 * There are lots of broken chipsets in the world. Some of them will
289 * violate the PCI spec when we issue byte sized memory writes to our
290 * controller. I/O mapped register access, if allowed by the given
291 * platform, will work in almost all cases.
292 */
293uint32_t aic79xx_allow_memio = ~0;
294
295/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 * So that we can set how long each device is given as a selection timeout.
297 * The table of values goes like this:
298 * 0 - 256ms
299 * 1 - 128ms
300 * 2 - 64ms
301 * 3 - 32ms
302 * We default to 256ms because some older devices need a longer time
303 * to respond to initial selection.
304 */
305static uint32_t aic79xx_seltime;
306
307/*
308 * Certain devices do not perform any aging on commands. Should the
309 * device be saturated by commands in one portion of the disk, it is
310 * possible for transactions on far away sectors to never be serviced.
311 * To handle these devices, we can periodically send an ordered tag to
312 * force all outstanding transactions to be serviced prior to a new
313 * transaction.
314 */
315uint32_t aic79xx_periodic_otag;
316
317/*
318 * Module information and settable options.
319 */
320static char *aic79xx = NULL;
321
322MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
323MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
324MODULE_LICENSE("Dual BSD/GPL");
325MODULE_VERSION(AIC79XX_DRIVER_VERSION);
Hannes Reinecke73a25462005-07-22 16:44:04 +0200326module_param(aic79xx, charp, 0444);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327MODULE_PARM_DESC(aic79xx,
328"period delimited, options string.\n"
329" verbose Enable verbose/diagnostic logging\n"
330" allow_memio Allow device registers to be memory mapped\n"
331" debug Bitmask of debug values to enable\n"
332" no_reset Supress initial bus resets\n"
333" extended Enable extended geometry on all controllers\n"
334" periodic_otag Send an ordered tagged transaction\n"
335" periodically to prevent tag starvation.\n"
336" This may be required by some older disk\n"
337" or drives/RAID arrays.\n"
338" reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
339" tag_info:<tag_str> Set per-target tag depth\n"
340" global_tag_depth:<int> Global tag depth for all targets on all buses\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341" slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
342" precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
343" amplitude:<int> Set the signal amplitude (0-7).\n"
344" seltime:<int> Selection Timeout:\n"
345" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
346"\n"
347" Sample /etc/modprobe.conf line:\n"
348" Enable verbose logging\n"
349" Set tag depth on Controller 2/Target 2 to 10 tags\n"
350" Shorten the selection timeout to 128ms\n"
351"\n"
352" options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
Hannes Reinecke73a25462005-07-22 16:44:04 +0200353"\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
355static void ahd_linux_handle_scsi_status(struct ahd_softc *,
Hannes Reinecke73a25462005-07-22 16:44:04 +0200356 struct scsi_device *,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 struct scb *);
358static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
Hannes Reinecke73a25462005-07-22 16:44:04 +0200359 struct scsi_cmnd *cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360static void ahd_linux_sem_timeout(u_long arg);
Hannes Reinecke73a25462005-07-22 16:44:04 +0200361static int ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
364 struct ahd_devinfo *devinfo);
Hannes Reinecke73a25462005-07-22 16:44:04 +0200365static void ahd_linux_device_queue_depth(struct scsi_device *);
Hannes Reinecke60a13212005-07-22 16:42:28 +0200366static int ahd_linux_run_command(struct ahd_softc*,
Hannes Reinecke73a25462005-07-22 16:44:04 +0200367 struct ahd_linux_device *,
Hannes Reinecke60a13212005-07-22 16:42:28 +0200368 struct scsi_cmnd *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369static void ahd_linux_setup_tag_info_global(char *p);
Hannes Reinecke73a25462005-07-22 16:44:04 +0200370static int aic79xx_setup(char *c);
Christoph Hellwig85a46522005-08-15 13:28:46 +0200371
372static int ahd_linux_unit;
373
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375/****************************** Inlines ***************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
377
378static __inline void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
380{
Hannes Reinecke73a25462005-07-22 16:44:04 +0200381 struct scsi_cmnd *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 int direction;
383
384 cmd = scb->io_ctx;
be7db052005-04-17 15:26:13 -0500385 direction = cmd->sc_data_direction;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
387 if (cmd->use_sg != 0) {
388 struct scatterlist *sg;
389
390 sg = (struct scatterlist *)cmd->request_buffer;
391 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
392 } else if (cmd->request_bufflen != 0) {
393 pci_unmap_single(ahd->dev_softc,
394 scb->platform_data->buf_busaddr,
395 cmd->request_bufflen, direction);
396 }
397}
398
399/******************************** Macros **************************************/
400#define BUILD_SCSIID(ahd, cmd) \
Jeff Garzik422c0d62005-10-24 18:05:09 -0400401 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 * Return a string describing the driver.
405 */
406static const char *
407ahd_linux_info(struct Scsi_Host *host)
408{
409 static char buffer[512];
410 char ahd_info[256];
411 char *bp;
412 struct ahd_softc *ahd;
413
414 bp = &buffer[0];
415 ahd = *(struct ahd_softc **)host->hostdata;
416 memset(bp, 0, sizeof(buffer));
417 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
418 strcat(bp, AIC79XX_DRIVER_VERSION);
419 strcat(bp, "\n");
420 strcat(bp, " <");
421 strcat(bp, ahd->description);
422 strcat(bp, ">\n");
423 strcat(bp, " ");
424 ahd_controller_info(ahd, ahd_info);
425 strcat(bp, ahd_info);
426 strcat(bp, "\n");
427
428 return (bp);
429}
430
431/*
432 * Queue an SCB to the controller.
433 */
434static int
Hannes Reinecke73a25462005-07-22 16:44:04 +0200435ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436{
437 struct ahd_softc *ahd;
Hannes Reinecke73a25462005-07-22 16:44:04 +0200438 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
Christoph Hellwig4065a412005-10-31 20:05:01 +0100439 int rtn = SCSI_MLQUEUE_HOST_BUSY;
440 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
442 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
443
Christoph Hellwig4065a412005-10-31 20:05:01 +0100444 ahd_lock(ahd, &flags);
445 if (ahd->platform_data->qfrozen == 0) {
446 cmd->scsi_done = scsi_done;
447 cmd->result = CAM_REQ_INPROG << 16;
448 rtn = ahd_linux_run_command(ahd, dev, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 }
Christoph Hellwig4065a412005-10-31 20:05:01 +0100451 ahd_unlock(ahd, &flags);
452 return rtn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453}
454
Hannes Reinecke73a25462005-07-22 16:44:04 +0200455static inline struct scsi_target **
456ahd_linux_target_in_softc(struct scsi_target *starget)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457{
Hannes Reinecke73a25462005-07-22 16:44:04 +0200458 struct ahd_softc *ahd =
459 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
460 unsigned int target_offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
Hannes Reinecke73a25462005-07-22 16:44:04 +0200462 target_offset = starget->id;
463 if (starget->channel != 0)
464 target_offset += 8;
465
466 return &ahd->platform_data->starget[target_offset];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467}
468
469static int
Hannes Reinecke73a25462005-07-22 16:44:04 +0200470ahd_linux_target_alloc(struct scsi_target *starget)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471{
Hannes Reinecke73a25462005-07-22 16:44:04 +0200472 struct ahd_softc *ahd =
473 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
474 unsigned long flags;
475 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
476 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
477 struct ahd_devinfo devinfo;
478 struct ahd_initiator_tinfo *tinfo;
479 struct ahd_tmode_tstate *tstate;
480 char channel = starget->channel + 'A';
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
Hannes Reinecke73a25462005-07-22 16:44:04 +0200482 ahd_lock(ahd, &flags);
483
484 BUG_ON(*ahd_targp != NULL);
485
486 *ahd_targp = starget;
487 memset(targ, 0, sizeof(*targ));
488
489 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
490 starget->id, &tstate);
491 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
492 CAM_LUN_WILDCARD, channel,
493 ROLE_INITIATOR);
494 spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */
495 if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
496 spi_max_offset(starget) = MAX_OFFSET_PACED_BUG;
497 else
498 spi_max_offset(starget) = MAX_OFFSET_PACED;
499 spi_max_width(starget) = ahd->features & AHD_WIDE;
500
501 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
502 AHD_TRANS_GOAL, /*paused*/FALSE);
503 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
504 AHD_TRANS_GOAL, /*paused*/FALSE);
505 ahd_unlock(ahd, &flags);
506
507 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508}
509
510static void
Hannes Reinecke73a25462005-07-22 16:44:04 +0200511ahd_linux_target_destroy(struct scsi_target *starget)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512{
Hannes Reinecke73a25462005-07-22 16:44:04 +0200513 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514
Hannes Reinecke73a25462005-07-22 16:44:04 +0200515 *ahd_targp = NULL;
516}
517
518static int
519ahd_linux_slave_alloc(struct scsi_device *sdev)
520{
521 struct ahd_softc *ahd =
522 *((struct ahd_softc **)sdev->host->hostdata);
523 struct scsi_target *starget = sdev->sdev_target;
524 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
525 struct ahd_linux_device *dev;
526
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 if (bootverbose)
Hannes Reinecke73a25462005-07-22 16:44:04 +0200528 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
529
530 BUG_ON(targ->sdev[sdev->lun] != NULL);
531
532 dev = scsi_transport_device_data(sdev);
533 memset(dev, 0, sizeof(*dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
535 /*
Hannes Reinecke73a25462005-07-22 16:44:04 +0200536 * We start out life using untagged
537 * transactions of which we allow one.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 */
Hannes Reinecke73a25462005-07-22 16:44:04 +0200539 dev->openings = 1;
540
541 /*
542 * Set maxtags to 0. This will be changed if we
543 * later determine that we are dealing with
544 * a tagged queuing capable device.
545 */
546 dev->maxtags = 0;
547
548 targ->sdev[sdev->lun] = sdev;
549
550 return (0);
551}
552
553static int
554ahd_linux_slave_configure(struct scsi_device *sdev)
555{
556 struct ahd_softc *ahd;
557
558 ahd = *((struct ahd_softc **)sdev->host->hostdata);
559 if (bootverbose)
Jeff Garzik017560f2005-10-24 18:04:36 -0400560 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
Hannes Reinecke73a25462005-07-22 16:44:04 +0200561
562 ahd_linux_device_queue_depth(sdev);
563
564 /* Initial Domain Validation */
565 if (!spi_initial_dv(sdev->sdev_target))
566 spi_dv_device(sdev);
567
568 return 0;
569}
570
571static void
572ahd_linux_slave_destroy(struct scsi_device *sdev)
573{
574 struct ahd_softc *ahd;
575 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
576 struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
577
578 ahd = *((struct ahd_softc **)sdev->host->hostdata);
579 if (bootverbose)
580 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
581
582 BUG_ON(dev->active);
583
584 targ->sdev[sdev->lun] = NULL;
585
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
588#if defined(__i386__)
589/*
590 * Return the disk geometry for the given SCSI device.
591 */
592static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
594 sector_t capacity, int geom[])
595{
596 uint8_t *bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 int heads;
598 int sectors;
599 int cylinders;
600 int ret;
601 int extended;
602 struct ahd_softc *ahd;
603
604 ahd = *((struct ahd_softc **)sdev->host->hostdata);
605
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 bh = scsi_bios_ptable(bdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 if (bh) {
608 ret = scsi_partsize(bh, capacity,
609 &geom[2], &geom[0], &geom[1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 kfree(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 if (ret != -1)
612 return (ret);
613 }
614 heads = 64;
615 sectors = 32;
616 cylinders = aic_sector_div(capacity, heads, sectors);
617
618 if (aic79xx_extended != 0)
619 extended = 1;
620 else
621 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
622 if (extended && cylinders >= 1024) {
623 heads = 255;
624 sectors = 63;
625 cylinders = aic_sector_div(capacity, heads, sectors);
626 }
627 geom[0] = heads;
628 geom[1] = sectors;
629 geom[2] = cylinders;
630 return (0);
631}
632#endif
633
634/*
635 * Abort the current SCSI command(s).
636 */
637static int
Hannes Reinecke73a25462005-07-22 16:44:04 +0200638ahd_linux_abort(struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639{
Hannes Reinecke73a25462005-07-22 16:44:04 +0200640 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641
Hannes Reinecke73a25462005-07-22 16:44:04 +0200642 error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
643 if (error != 0)
644 printf("aic79xx_abort returns 0x%x\n", error);
645 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646}
647
648/*
649 * Attempt to send a target reset message to the device that timed out.
650 */
651static int
Hannes Reinecke73a25462005-07-22 16:44:04 +0200652ahd_linux_dev_reset(struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653{
Hannes Reinecke73a25462005-07-22 16:44:04 +0200654 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655
Hannes Reinecke73a25462005-07-22 16:44:04 +0200656 error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
657 if (error != 0)
658 printf("aic79xx_dev_reset returns 0x%x\n", error);
659 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660}
661
662/*
663 * Reset the SCSI bus.
664 */
665static int
Hannes Reinecke73a25462005-07-22 16:44:04 +0200666ahd_linux_bus_reset(struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667{
668 struct ahd_softc *ahd;
669 u_long s;
670 int found;
671
672 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
673#ifdef AHD_DEBUG
674 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
675 printf("%s: Bus reset called for cmd %p\n",
676 ahd_name(ahd), cmd);
677#endif
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400678 ahd_lock(ahd, &s);
Jeff Garzik422c0d62005-10-24 18:05:09 -0400679 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 /*initiate reset*/TRUE);
Jeff Garzik 68b3aa72005-05-28 07:56:31 -0400681 ahd_unlock(ahd, &s);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
683 if (bootverbose)
684 printf("%s: SCSI bus reset delivered. "
685 "%d SCBs aborted.\n", ahd_name(ahd), found);
686
687 return (SUCCESS);
688}
689
Hannes Reinecke73a25462005-07-22 16:44:04 +0200690struct scsi_host_template aic79xx_driver_template = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 .module = THIS_MODULE,
692 .name = "aic79xx",
Christoph Hellwig85a46522005-08-15 13:28:46 +0200693 .proc_name = "aic79xx",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 .proc_info = ahd_linux_proc_info,
695 .info = ahd_linux_info,
696 .queuecommand = ahd_linux_queue,
697 .eh_abort_handler = ahd_linux_abort,
698 .eh_device_reset_handler = ahd_linux_dev_reset,
699 .eh_bus_reset_handler = ahd_linux_bus_reset,
700#if defined(__i386__)
701 .bios_param = ahd_linux_biosparam,
702#endif
703 .can_queue = AHD_MAX_QUEUE,
704 .this_id = -1,
705 .cmd_per_lun = 2,
706 .use_clustering = ENABLE_CLUSTERING,
707 .slave_alloc = ahd_linux_slave_alloc,
708 .slave_configure = ahd_linux_slave_configure,
709 .slave_destroy = ahd_linux_slave_destroy,
Hannes Reinecke73a25462005-07-22 16:44:04 +0200710 .target_alloc = ahd_linux_target_alloc,
711 .target_destroy = ahd_linux_target_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712};
713
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714/******************************** Bus DMA *************************************/
715int
716ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
717 bus_size_t alignment, bus_size_t boundary,
718 dma_addr_t lowaddr, dma_addr_t highaddr,
719 bus_dma_filter_t *filter, void *filterarg,
720 bus_size_t maxsize, int nsegments,
721 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
722{
723 bus_dma_tag_t dmat;
724
725 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
726 if (dmat == NULL)
727 return (ENOMEM);
728
729 /*
730 * Linux is very simplistic about DMA memory. For now don't
731 * maintain all specification information. Once Linux supplies
732 * better facilities for doing these operations, or the
733 * needs of this particular driver change, we might need to do
734 * more here.
735 */
736 dmat->alignment = alignment;
737 dmat->boundary = boundary;
738 dmat->maxsize = maxsize;
739 *ret_tag = dmat;
740 return (0);
741}
742
743void
744ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
745{
746 free(dmat, M_DEVBUF);
747}
748
749int
750ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
751 int flags, bus_dmamap_t *mapp)
752{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 *vaddr = pci_alloc_consistent(ahd->dev_softc,
Hannes Reinecke73a25462005-07-22 16:44:04 +0200754 dmat->maxsize, mapp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 if (*vaddr == NULL)
756 return (ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 return(0);
758}
759
760void
761ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
762 void* vaddr, bus_dmamap_t map)
763{
764 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
Hannes Reinecke73a25462005-07-22 16:44:04 +0200765 vaddr, map);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766}
767
768int
769ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
770 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
771 void *cb_arg, int flags)
772{
773 /*
774 * Assume for now that this will only be used during
775 * initialization and not for per-transaction buffer mapping.
776 */
777 bus_dma_segment_t stack_sg;
778
Hannes Reinecke73a25462005-07-22 16:44:04 +0200779 stack_sg.ds_addr = map;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 stack_sg.ds_len = dmat->maxsize;
781 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
782 return (0);
783}
784
785void
786ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
787{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788}
789
790int
791ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
792{
793 /* Nothing to do */
794 return (0);
795}
796
797/********************* Platform Dependent Functions ***************************/
798/*
799 * Compare "left hand" softc with "right hand" softc, returning:
800 * < 0 - lahd has a lower priority than rahd
801 * 0 - Softcs are equal
802 * > 0 - lahd has a higher priority than rahd
803 */
804int
805ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
806{
807 int value;
808
809 /*
810 * Under Linux, cards are ordered as follows:
811 * 1) PCI devices that are marked as the boot controller.
812 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
813 * 3) All remaining PCI devices sorted by bus/slot/func.
814 */
815#if 0
816 value = (lahd->flags & AHD_BOOT_CHANNEL)
817 - (rahd->flags & AHD_BOOT_CHANNEL);
818 if (value != 0)
819 /* Controllers set for boot have a *higher* priority */
820 return (value);
821#endif
822
823 value = (lahd->flags & AHD_BIOS_ENABLED)
824 - (rahd->flags & AHD_BIOS_ENABLED);
825 if (value != 0)
826 /* Controllers with BIOS enabled have a *higher* priority */
827 return (value);
828
829 /* Still equal. Sort by bus/slot/func. */
830 if (aic79xx_reverse_scan != 0)
831 value = ahd_get_pci_bus(lahd->dev_softc)
832 - ahd_get_pci_bus(rahd->dev_softc);
833 else
834 value = ahd_get_pci_bus(rahd->dev_softc)
835 - ahd_get_pci_bus(lahd->dev_softc);
836 if (value != 0)
837 return (value);
838 if (aic79xx_reverse_scan != 0)
839 value = ahd_get_pci_slot(lahd->dev_softc)
840 - ahd_get_pci_slot(rahd->dev_softc);
841 else
842 value = ahd_get_pci_slot(rahd->dev_softc)
843 - ahd_get_pci_slot(lahd->dev_softc);
844 if (value != 0)
845 return (value);
846
847 value = rahd->channel - lahd->channel;
848 return (value);
849}
850
851static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
853{
854
855 if ((instance >= 0)
856 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
857 uint8_t *iocell_info;
858
859 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
860 iocell_info[index] = value & 0xFFFF;
861 if (bootverbose)
862 printf("iocell[%d:%ld] = %d\n", instance, index, value);
863 }
864}
865
866static void
867ahd_linux_setup_tag_info_global(char *p)
868{
869 int tags, i, j;
870
871 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
872 printf("Setting Global Tags= %d\n", tags);
873
874 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
875 for (j = 0; j < AHD_NUM_TARGETS; j++) {
876 aic79xx_tag_info[i].tag_commands[j] = tags;
877 }
878 }
879}
880
Hannes Reinecke73a25462005-07-22 16:44:04 +0200881static void
882ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
883{
884
885 if ((instance >= 0) && (targ >= 0)
886 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
887 && (targ < AHD_NUM_TARGETS)) {
888 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
889 if (bootverbose)
890 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
891 }
892}
893
Christoph Hellwig1ff92732005-08-19 18:57:13 +0200894static char *
895ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
896 void (*callback)(u_long, int, int, int32_t),
897 u_long callback_arg)
898{
899 char *tok_end;
900 char *tok_end2;
901 int i;
902 int instance;
903 int targ;
904 int done;
905 char tok_list[] = {'.', ',', '{', '}', '\0'};
906
907 /* All options use a ':' name/arg separator */
908 if (*opt_arg != ':')
909 return (opt_arg);
910 opt_arg++;
911 instance = -1;
912 targ = -1;
913 done = FALSE;
914 /*
915 * Restore separator that may be in
916 * the middle of our option argument.
917 */
918 tok_end = strchr(opt_arg, '\0');
919 if (tok_end < end)
920 *tok_end = ',';
921 while (!done) {
922 switch (*opt_arg) {
923 case '{':
924 if (instance == -1) {
925 instance = 0;
926 } else {
927 if (depth > 1) {
928 if (targ == -1)
929 targ = 0;
930 } else {
931 printf("Malformed Option %s\n",
932 opt_name);
933 done = TRUE;
934 }
935 }
936 opt_arg++;
937 break;
938 case '}':
939 if (targ != -1)
940 targ = -1;
941 else if (instance != -1)
942 instance = -1;
943 opt_arg++;
944 break;
945 case ',':
946 case '.':
947 if (instance == -1)
948 done = TRUE;
949 else if (targ >= 0)
950 targ++;
951 else if (instance >= 0)
952 instance++;
953 opt_arg++;
954 break;
955 case '\0':
956 done = TRUE;
957 break;
958 default:
959 tok_end = end;
960 for (i = 0; tok_list[i]; i++) {
961 tok_end2 = strchr(opt_arg, tok_list[i]);
962 if ((tok_end2) && (tok_end2 < tok_end))
963 tok_end = tok_end2;
964 }
965 callback(callback_arg, instance, targ,
966 simple_strtol(opt_arg, NULL, 0));
967 opt_arg = tok_end;
968 break;
969 }
970 }
971 return (opt_arg);
972}
973
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974/*
975 * Handle Linux boot parameters. This routine allows for assigning a value
976 * to a parameter with a ':' between the parameter and the value.
977 * ie. aic79xx=stpwlev:1,extended
978 */
979static int
980aic79xx_setup(char *s)
981{
982 int i, n;
983 char *p;
984 char *end;
985
986 static struct {
987 const char *name;
988 uint32_t *flag;
989 } options[] = {
990 { "extended", &aic79xx_extended },
991 { "no_reset", &aic79xx_no_reset },
992 { "verbose", &aic79xx_verbose },
993 { "allow_memio", &aic79xx_allow_memio},
994#ifdef AHD_DEBUG
995 { "debug", &ahd_debug },
996#endif
997 { "reverse_scan", &aic79xx_reverse_scan },
998 { "periodic_otag", &aic79xx_periodic_otag },
999 { "pci_parity", &aic79xx_pci_parity },
1000 { "seltime", &aic79xx_seltime },
1001 { "tag_info", NULL },
1002 { "global_tag_depth", NULL},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 { "slewrate", NULL },
1004 { "precomp", NULL },
1005 { "amplitude", NULL },
1006 };
1007
1008 end = strchr(s, '\0');
1009
1010 /*
1011 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1012 * will never be 0 in this case.
1013 */
1014 n = 0;
1015
1016 while ((p = strsep(&s, ",.")) != NULL) {
1017 if (*p == '\0')
1018 continue;
1019 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1020
1021 n = strlen(options[i].name);
1022 if (strncmp(options[i].name, p, n) == 0)
1023 break;
1024 }
1025 if (i == NUM_ELEMENTS(options))
1026 continue;
1027
1028 if (strncmp(p, "global_tag_depth", n) == 0) {
1029 ahd_linux_setup_tag_info_global(p + n);
1030 } else if (strncmp(p, "tag_info", n) == 0) {
Christoph Hellwig1ff92732005-08-19 18:57:13 +02001031 s = ahd_parse_brace_option("tag_info", p + n, end,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 2, ahd_linux_setup_tag_info, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 } else if (strncmp(p, "slewrate", n) == 0) {
Christoph Hellwig1ff92732005-08-19 18:57:13 +02001034 s = ahd_parse_brace_option("slewrate",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 p + n, end, 1, ahd_linux_setup_iocell_info,
1036 AIC79XX_SLEWRATE_INDEX);
1037 } else if (strncmp(p, "precomp", n) == 0) {
Christoph Hellwig1ff92732005-08-19 18:57:13 +02001038 s = ahd_parse_brace_option("precomp",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 p + n, end, 1, ahd_linux_setup_iocell_info,
1040 AIC79XX_PRECOMP_INDEX);
1041 } else if (strncmp(p, "amplitude", n) == 0) {
Christoph Hellwig1ff92732005-08-19 18:57:13 +02001042 s = ahd_parse_brace_option("amplitude",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 p + n, end, 1, ahd_linux_setup_iocell_info,
1044 AIC79XX_AMPLITUDE_INDEX);
1045 } else if (p[n] == ':') {
1046 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1047 } else if (!strncmp(p, "verbose", n)) {
1048 *(options[i].flag) = 1;
1049 } else {
1050 *(options[i].flag) ^= 0xFFFFFFFF;
1051 }
1052 }
1053 return 1;
1054}
1055
1056__setup("aic79xx=", aic79xx_setup);
1057
1058uint32_t aic79xx_verbose;
1059
1060int
Hannes Reinecke73a25462005-07-22 16:44:04 +02001061ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062{
1063 char buf[80];
1064 struct Scsi_Host *host;
1065 char *new_name;
1066 u_long s;
Jesper Juhle7a1ca12005-12-14 19:27:28 +01001067 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068
1069 template->name = ahd->description;
1070 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1071 if (host == NULL)
1072 return (ENOMEM);
1073
1074 *((struct ahd_softc **)host->hostdata) = ahd;
1075 ahd_lock(ahd, &s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 ahd->platform_data->host = host;
1077 host->can_queue = AHD_MAX_QUEUE;
1078 host->cmd_per_lun = 2;
1079 host->sg_tablesize = AHD_NSEG;
1080 host->this_id = ahd->our_id;
1081 host->irq = ahd->platform_data->irq;
1082 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1083 host->max_lun = AHD_NUM_LUNS;
1084 host->max_channel = 0;
1085 host->sg_tablesize = AHD_NSEG;
Christoph Hellwig85a46522005-08-15 13:28:46 +02001086 ahd_set_unit(ahd, ahd_linux_unit++);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 sprintf(buf, "scsi%d", host->host_no);
1088 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1089 if (new_name != NULL) {
1090 strcpy(new_name, buf);
1091 ahd_set_name(ahd, new_name);
1092 }
1093 host->unique_id = ahd->unit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 ahd_linux_initialize_scsi_bus(ahd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 ahd_intr_enable(ahd, TRUE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 ahd_unlock(ahd, &s);
1097
Hannes Reinecke73a25462005-07-22 16:44:04 +02001098 host->transportt = ahd_linux_transport_template;
1099
Jesper Juhle7a1ca12005-12-14 19:27:28 +01001100 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1101 if (retval) {
1102 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1103 scsi_host_put(host);
1104 return retval;
1105 }
1106
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 scsi_scan_host(host);
Jesper Juhle7a1ca12005-12-14 19:27:28 +01001108 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109}
1110
1111uint64_t
1112ahd_linux_get_memsize(void)
1113{
1114 struct sysinfo si;
1115
1116 si_meminfo(&si);
1117 return ((uint64_t)si.totalram << PAGE_SHIFT);
1118}
1119
1120/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 * Place the SCSI bus into a known state by either resetting it,
1122 * or forcing transfer negotiations on the next command to any
1123 * target.
1124 */
1125static void
1126ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1127{
1128 u_int target_id;
1129 u_int numtarg;
1130
1131 target_id = 0;
1132 numtarg = 0;
1133
1134 if (aic79xx_no_reset != 0)
1135 ahd->flags &= ~AHD_RESET_BUS_A;
1136
1137 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1138 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1139 else
1140 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1141
1142 /*
1143 * Force negotiation to async for all targets that
1144 * will not see an initial bus reset.
1145 */
1146 for (; target_id < numtarg; target_id++) {
1147 struct ahd_devinfo devinfo;
1148 struct ahd_initiator_tinfo *tinfo;
1149 struct ahd_tmode_tstate *tstate;
1150
1151 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1152 target_id, &tstate);
1153 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1154 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1155 ahd_update_neg_request(ahd, &devinfo, tstate,
1156 tinfo, AHD_NEG_ALWAYS);
1157 }
1158 /* Give the bus some time to recover */
1159 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1160 ahd_freeze_simq(ahd);
1161 init_timer(&ahd->platform_data->reset_timer);
1162 ahd->platform_data->reset_timer.data = (u_long)ahd;
1163 ahd->platform_data->reset_timer.expires =
1164 jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
1165 ahd->platform_data->reset_timer.function =
1166 (ahd_linux_callback_t *)ahd_release_simq;
1167 add_timer(&ahd->platform_data->reset_timer);
1168 }
1169}
1170
1171int
1172ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1173{
1174 ahd->platform_data =
1175 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1176 if (ahd->platform_data == NULL)
1177 return (ENOMEM);
1178 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 ahd_lockinit(ahd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1183 return (0);
1184}
1185
1186void
1187ahd_platform_free(struct ahd_softc *ahd)
1188{
Hannes Reinecke73a25462005-07-22 16:44:04 +02001189 struct scsi_target *starget;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 int i, j;
1191
1192 if (ahd->platform_data != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 /* destroy all of the device and target objects */
1194 for (i = 0; i < AHD_NUM_TARGETS; i++) {
Hannes Reinecke73a25462005-07-22 16:44:04 +02001195 starget = ahd->platform_data->starget[i];
1196 if (starget != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 for (j = 0; j < AHD_NUM_LUNS; j++) {
Hannes Reinecke73a25462005-07-22 16:44:04 +02001198 struct ahd_linux_target *targ =
1199 scsi_transport_target_data(starget);
1200 if (targ->sdev[j] == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 continue;
Hannes Reinecke73a25462005-07-22 16:44:04 +02001202 targ->sdev[j] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 }
Hannes Reinecke73a25462005-07-22 16:44:04 +02001204 ahd->platform_data->starget[i] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 }
1206 }
1207
1208 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1209 free_irq(ahd->platform_data->irq, ahd);
1210 if (ahd->tags[0] == BUS_SPACE_PIO
1211 && ahd->bshs[0].ioport != 0)
1212 release_region(ahd->bshs[0].ioport, 256);
1213 if (ahd->tags[1] == BUS_SPACE_PIO
1214 && ahd->bshs[1].ioport != 0)
1215 release_region(ahd->bshs[1].ioport, 256);
1216 if (ahd->tags[0] == BUS_SPACE_MEMIO
1217 && ahd->bshs[0].maddr != NULL) {
1218 iounmap(ahd->bshs[0].maddr);
1219 release_mem_region(ahd->platform_data->mem_busaddr,
1220 0x1000);
1221 }
James Bottomley97af50f2005-10-02 15:22:35 -05001222 if (ahd->platform_data->host)
1223 scsi_host_put(ahd->platform_data->host);
1224
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225 free(ahd->platform_data, M_DEVBUF);
1226 }
1227}
1228
1229void
1230ahd_platform_init(struct ahd_softc *ahd)
1231{
1232 /*
1233 * Lookup and commit any modified IO Cell options.
1234 */
1235 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
1236 struct ahd_linux_iocell_opts *iocell_opts;
1237
1238 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1239 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1240 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1241 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1242 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1243 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1244 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1245 }
1246
1247}
1248
1249void
1250ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1251{
1252 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1253 SCB_GET_CHANNEL(ahd, scb),
1254 SCB_GET_LUN(scb), SCB_LIST_NULL,
1255 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1256}
1257
1258void
1259ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
1260 ahd_queue_alg alg)
1261{
Hannes Reinecke73a25462005-07-22 16:44:04 +02001262 struct scsi_target *starget;
1263 struct ahd_linux_target *targ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 struct ahd_linux_device *dev;
Hannes Reinecke73a25462005-07-22 16:44:04 +02001265 struct scsi_device *sdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 int was_queuing;
1267 int now_queuing;
1268
Hannes Reinecke73a25462005-07-22 16:44:04 +02001269 starget = ahd->platform_data->starget[devinfo->target];
1270 targ = scsi_transport_target_data(starget);
1271 BUG_ON(targ == NULL);
1272 sdev = targ->sdev[devinfo->lun];
1273 if (sdev == NULL)
1274 return;
1275
1276 dev = scsi_transport_device_data(sdev);
1277
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 if (dev == NULL)
1279 return;
1280 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1281 switch (alg) {
1282 default:
1283 case AHD_QUEUE_NONE:
1284 now_queuing = 0;
1285 break;
1286 case AHD_QUEUE_BASIC:
1287 now_queuing = AHD_DEV_Q_BASIC;
1288 break;
1289 case AHD_QUEUE_TAGGED:
1290 now_queuing = AHD_DEV_Q_TAGGED;
1291 break;
1292 }
1293 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1294 && (was_queuing != now_queuing)
1295 && (dev->active != 0)) {
1296 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1297 dev->qfrozen++;
1298 }
1299
1300 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1301 if (now_queuing) {
1302 u_int usertags;
1303
1304 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1305 if (!was_queuing) {
1306 /*
1307 * Start out agressively and allow our
1308 * dynamic queue depth algorithm to take
1309 * care of the rest.
1310 */
1311 dev->maxtags = usertags;
1312 dev->openings = dev->maxtags - dev->active;
1313 }
1314 if (dev->maxtags == 0) {
1315 /*
1316 * Queueing is disabled by the user.
1317 */
1318 dev->openings = 1;
1319 } else if (alg == AHD_QUEUE_TAGGED) {
1320 dev->flags |= AHD_DEV_Q_TAGGED;
1321 if (aic79xx_periodic_otag != 0)
1322 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1323 } else
1324 dev->flags |= AHD_DEV_Q_BASIC;
1325 } else {
1326 /* We can only have one opening. */
1327 dev->maxtags = 0;
1328 dev->openings = 1 - dev->active;
1329 }
Hannes Reinecke60a13212005-07-22 16:42:28 +02001330
Hannes Reinecke73a25462005-07-22 16:44:04 +02001331 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1332 case AHD_DEV_Q_BASIC:
1333 scsi_adjust_queue_depth(sdev,
1334 MSG_SIMPLE_TASK,
1335 dev->openings + dev->active);
1336 break;
1337 case AHD_DEV_Q_TAGGED:
1338 scsi_adjust_queue_depth(sdev,
1339 MSG_ORDERED_TASK,
1340 dev->openings + dev->active);
1341 break;
1342 default:
1343 /*
1344 * We allow the OS to queue 2 untagged transactions to
1345 * us at any time even though we can only execute them
1346 * serially on the controller/device. This should
1347 * remove some latency.
1348 */
1349 scsi_adjust_queue_depth(sdev,
1350 /*NON-TAGGED*/0,
1351 /*queue depth*/2);
1352 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354}
1355
1356int
1357ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1358 int lun, u_int tag, role_t role, uint32_t status)
1359{
Hannes Reinecke60a13212005-07-22 16:42:28 +02001360 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361}
1362
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363static u_int
1364ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1365{
1366 static int warned_user;
1367 u_int tags;
1368
1369 tags = 0;
1370 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1371 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
1372
1373 if (warned_user == 0) {
1374 printf(KERN_WARNING
1375"aic79xx: WARNING: Insufficient tag_info instances\n"
1376"aic79xx: for installed controllers. Using defaults\n"
1377"aic79xx: Please update the aic79xx_tag_info array in\n"
1378"aic79xx: the aic79xx_osm.c source file.\n");
1379 warned_user++;
1380 }
1381 tags = AHD_MAX_QUEUE;
1382 } else {
1383 adapter_tag_info_t *tag_info;
1384
1385 tag_info = &aic79xx_tag_info[ahd->unit];
1386 tags = tag_info->tag_commands[devinfo->target_offset];
1387 if (tags > AHD_MAX_QUEUE)
1388 tags = AHD_MAX_QUEUE;
1389 }
1390 }
1391 return (tags);
1392}
1393
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394/*
1395 * Determines the queue depth for a given device.
1396 */
1397static void
Hannes Reinecke73a25462005-07-22 16:44:04 +02001398ahd_linux_device_queue_depth(struct scsi_device *sdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399{
1400 struct ahd_devinfo devinfo;
1401 u_int tags;
Hannes Reinecke73a25462005-07-22 16:44:04 +02001402 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403
1404 ahd_compile_devinfo(&devinfo,
1405 ahd->our_id,
Hannes Reinecke73a25462005-07-22 16:44:04 +02001406 sdev->sdev_target->id, sdev->lun,
1407 sdev->sdev_target->channel == 0 ? 'A' : 'B',
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 ROLE_INITIATOR);
1409 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
Hannes Reinecke73a25462005-07-22 16:44:04 +02001410 if (tags != 0 && sdev->tagged_supported != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411
1412 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
1413 ahd_print_devinfo(ahd, &devinfo);
1414 printf("Tagged Queuing enabled. Depth %d\n", tags);
1415 } else {
1416 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
1417 }
1418}
1419
Hannes Reinecke60a13212005-07-22 16:42:28 +02001420static int
1421ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1422 struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 struct scb *scb;
1425 struct hardware_scb *hscb;
1426 struct ahd_initiator_tinfo *tinfo;
1427 struct ahd_tmode_tstate *tstate;
1428 u_int col_idx;
1429 uint16_t mask;
1430
Hannes Reinecke60a13212005-07-22 16:42:28 +02001431 /*
1432 * Get an scb to use.
1433 */
1434 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1435 cmd->device->id, &tstate);
1436 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1437 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1438 col_idx = AHD_NEVER_COL_IDX;
1439 } else {
1440 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1441 cmd->device->lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 }
Hannes Reinecke60a13212005-07-22 16:42:28 +02001443 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1444 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1445 return SCSI_MLQUEUE_HOST_BUSY;
1446 }
1447
1448 scb->io_ctx = cmd;
1449 scb->platform_data->dev = dev;
1450 hscb = scb->hscb;
1451 cmd->host_scribble = (char *)scb;
1452
1453 /*
1454 * Fill out basics of the HSCB.
1455 */
1456 hscb->control = 0;
1457 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1458 hscb->lun = cmd->device->lun;
1459 scb->hscb->task_management = 0;
1460 mask = SCB_GET_TARGET_MASK(ahd, scb);
1461
1462 if ((ahd->user_discenable & mask) != 0)
1463 hscb->control |= DISCENB;
1464
Hannes Reinecke60a13212005-07-22 16:42:28 +02001465 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1466 scb->flags |= SCB_PACKETIZED;
1467
1468 if ((tstate->auto_negotiate & mask) != 0) {
1469 scb->flags |= SCB_AUTO_NEGOTIATE;
1470 scb->hscb->control |= MK_MESSAGE;
1471 }
1472
1473 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1474 int msg_bytes;
1475 uint8_t tag_msgs[2];
1476
1477 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1478 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1479 hscb->control |= tag_msgs[0];
1480 if (tag_msgs[0] == MSG_ORDERED_TASK)
1481 dev->commands_since_idle_or_otag = 0;
1482 } else
1483 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1484 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1485 hscb->control |= MSG_ORDERED_TASK;
1486 dev->commands_since_idle_or_otag = 0;
1487 } else {
1488 hscb->control |= MSG_SIMPLE_TASK;
1489 }
1490 }
1491
1492 hscb->cdb_len = cmd->cmd_len;
1493 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1494
Hannes Reinecke73a25462005-07-22 16:44:04 +02001495 scb->platform_data->xfer_len = 0;
Hannes Reinecke60a13212005-07-22 16:42:28 +02001496 ahd_set_residual(scb, 0);
1497 ahd_set_sense_residual(scb, 0);
Hannes Reinecke73a25462005-07-22 16:44:04 +02001498 scb->sg_count = 0;
Hannes Reinecke60a13212005-07-22 16:42:28 +02001499 if (cmd->use_sg != 0) {
1500 void *sg;
1501 struct scatterlist *cur_seg;
1502 u_int nseg;
1503 int dir;
1504
1505 cur_seg = (struct scatterlist *)cmd->request_buffer;
1506 dir = cmd->sc_data_direction;
1507 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1508 cmd->use_sg, dir);
1509 scb->platform_data->xfer_len = 0;
1510 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1511 dma_addr_t addr;
1512 bus_size_t len;
1513
1514 addr = sg_dma_address(cur_seg);
1515 len = sg_dma_len(cur_seg);
1516 scb->platform_data->xfer_len += len;
1517 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1518 /*last*/nseg == 1);
1519 }
1520 } else if (cmd->request_bufflen != 0) {
1521 void *sg;
1522 dma_addr_t addr;
1523 int dir;
1524
1525 sg = scb->sg_list;
1526 dir = cmd->sc_data_direction;
1527 addr = pci_map_single(ahd->dev_softc,
1528 cmd->request_buffer,
1529 cmd->request_bufflen, dir);
1530 scb->platform_data->xfer_len = cmd->request_bufflen;
1531 scb->platform_data->buf_busaddr = addr;
1532 sg = ahd_sg_setup(ahd, scb, sg, addr,
1533 cmd->request_bufflen, /*last*/TRUE);
1534 }
1535
1536 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1537 dev->openings--;
1538 dev->active++;
1539 dev->commands_issued++;
1540
Hannes Reinecke60a13212005-07-22 16:42:28 +02001541 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1542 dev->commands_since_idle_or_otag++;
1543 scb->flags |= SCB_ACTIVE;
1544 ahd_queue_scb(ahd, scb);
1545
1546 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547}
1548
1549/*
1550 * SCSI controller interrupt handler.
1551 */
1552irqreturn_t
1553ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1554{
1555 struct ahd_softc *ahd;
1556 u_long flags;
1557 int ours;
1558
1559 ahd = (struct ahd_softc *) dev_id;
1560 ahd_lock(ahd, &flags);
1561 ours = ahd_intr(ahd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562 ahd_unlock(ahd, &flags);
1563 return IRQ_RETVAL(ours);
1564}
1565
1566void
1567ahd_platform_flushwork(struct ahd_softc *ahd)
1568{
1569
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570}
1571
1572void
1573ahd_send_async(struct ahd_softc *ahd, char channel,
1574 u_int target, u_int lun, ac_code code, void *arg)
1575{
1576 switch (code) {
1577 case AC_TRANSFER_NEG:
1578 {
1579 char buf[80];
Hannes Reinecke73a25462005-07-22 16:44:04 +02001580 struct scsi_target *starget;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581 struct ahd_linux_target *targ;
1582 struct info_str info;
1583 struct ahd_initiator_tinfo *tinfo;
1584 struct ahd_tmode_tstate *tstate;
Hannes Reinecke73a25462005-07-22 16:44:04 +02001585 unsigned int target_ppr_options;
1586
1587 BUG_ON(target == CAM_TARGET_WILDCARD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588
1589 info.buffer = buf;
1590 info.length = sizeof(buf);
1591 info.offset = 0;
1592 info.pos = 0;
1593 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1594 target, &tstate);
1595
1596 /*
1597 * Don't bother reporting results while
1598 * negotiations are still pending.
1599 */
1600 if (tinfo->curr.period != tinfo->goal.period
1601 || tinfo->curr.width != tinfo->goal.width
1602 || tinfo->curr.offset != tinfo->goal.offset
1603 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1604 if (bootverbose == 0)
1605 break;
1606
1607 /*
1608 * Don't bother reporting results that
1609 * are identical to those last reported.
1610 */
Hannes Reinecke73a25462005-07-22 16:44:04 +02001611 starget = ahd->platform_data->starget[target];
James Bottomleyfc789a92005-08-05 16:24:54 -05001612 if (starget == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613 break;
James Bottomleyfc789a92005-08-05 16:24:54 -05001614 targ = scsi_transport_target_data(starget);
Hannes Reinecke73a25462005-07-22 16:44:04 +02001615
1616 target_ppr_options =
1617 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1618 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
James Bottomley3f40d7d2005-08-03 13:25:10 -05001619 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1620 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1621 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1622 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
James Bottomley88ff29a2005-08-03 15:59:04 -05001623 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1624 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
Hannes Reinecke73a25462005-07-22 16:44:04 +02001625
1626 if (tinfo->curr.period == spi_period(starget)
1627 && tinfo->curr.width == spi_width(starget)
1628 && tinfo->curr.offset == spi_offset(starget)
1629 && tinfo->curr.ppr_options == target_ppr_options)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 if (bootverbose == 0)
1631 break;
1632
Hannes Reinecke73a25462005-07-22 16:44:04 +02001633 spi_period(starget) = tinfo->curr.period;
1634 spi_width(starget) = tinfo->curr.width;
1635 spi_offset(starget) = tinfo->curr.offset;
Hannes Reineckea4b53a12005-08-01 09:52:56 +02001636 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1637 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1638 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
James Bottomley3f40d7d2005-08-03 13:25:10 -05001639 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1640 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1641 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1642 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
James Bottomley88ff29a2005-08-03 15:59:04 -05001643 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
Hannes Reinecke73a25462005-07-22 16:44:04 +02001644 spi_display_xfer_agreement(starget);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 break;
1646 }
1647 case AC_SENT_BDR:
1648 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 WARN_ON(lun != CAM_LUN_WILDCARD);
1650 scsi_report_device_reset(ahd->platform_data->host,
1651 channel - 'A', target);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652 break;
1653 }
1654 case AC_BUS_RESET:
1655 if (ahd->platform_data->host != NULL) {
1656 scsi_report_bus_reset(ahd->platform_data->host,
1657 channel - 'A');
1658 }
1659 break;
1660 default:
1661 panic("ahd_send_async: Unexpected async event");
1662 }
1663}
1664
1665/*
1666 * Calls the higher level scsi done function and frees the scb.
1667 */
1668void
1669ahd_done(struct ahd_softc *ahd, struct scb *scb)
1670{
Hannes Reinecke73a25462005-07-22 16:44:04 +02001671 struct scsi_cmnd *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672 struct ahd_linux_device *dev;
1673
1674 if ((scb->flags & SCB_ACTIVE) == 0) {
1675 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1676 ahd_dump_card_state(ahd);
1677 panic("Stopping for safety");
1678 }
1679 LIST_REMOVE(scb, pending_links);
1680 cmd = scb->io_ctx;
1681 dev = scb->platform_data->dev;
1682 dev->active--;
1683 dev->openings++;
1684 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1685 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1686 dev->qfrozen--;
1687 }
1688 ahd_linux_unmap_scb(ahd, scb);
1689
1690 /*
1691 * Guard against stale sense data.
1692 * The Linux mid-layer assumes that sense
1693 * was retrieved anytime the first byte of
1694 * the sense buffer looks "sane".
1695 */
1696 cmd->sense_buffer[0] = 0;
1697 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1698 uint32_t amount_xferred;
1699
1700 amount_xferred =
1701 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1702 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1703#ifdef AHD_DEBUG
1704 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1705 ahd_print_path(ahd, scb);
1706 printf("Set CAM_UNCOR_PARITY\n");
1707 }
1708#endif
1709 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1710#ifdef AHD_REPORT_UNDERFLOWS
1711 /*
1712 * This code is disabled by default as some
1713 * clients of the SCSI system do not properly
1714 * initialize the underflow parameter. This
1715 * results in spurious termination of commands
1716 * that complete as expected (e.g. underflow is
1717 * allowed as command can return variable amounts
1718 * of data.
1719 */
1720 } else if (amount_xferred < scb->io_ctx->underflow) {
1721 u_int i;
1722
1723 ahd_print_path(ahd, scb);
1724 printf("CDB:");
1725 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1726 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1727 printf("\n");
1728 ahd_print_path(ahd, scb);
1729 printf("Saw underflow (%ld of %ld bytes). "
1730 "Treated as error\n",
1731 ahd_get_residual(scb),
1732 ahd_get_transfer_length(scb));
1733 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1734#endif
1735 } else {
1736 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1737 }
1738 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
Hannes Reinecke73a25462005-07-22 16:44:04 +02001739 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741
1742 if (dev->openings == 1
1743 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1744 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1745 dev->tag_success_count++;
1746 /*
1747 * Some devices deal with temporary internal resource
1748 * shortages by returning queue full. When the queue
1749 * full occurrs, we throttle back. Slowly try to get
1750 * back to our previous queue depth.
1751 */
1752 if ((dev->openings + dev->active) < dev->maxtags
1753 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1754 dev->tag_success_count = 0;
1755 dev->openings++;
1756 }
1757
1758 if (dev->active == 0)
1759 dev->commands_since_idle_or_otag = 0;
1760
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1762 printf("Recovery SCB completes\n");
1763 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1764 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1765 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
Hannes Reinecke73a25462005-07-22 16:44:04 +02001766 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
1767 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768 up(&ahd->platform_data->eh_sem);
1769 }
1770 }
1771
1772 ahd_free_scb(ahd, scb);
1773 ahd_linux_queue_cmd_complete(ahd, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774}
1775
1776static void
1777ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
Hannes Reinecke73a25462005-07-22 16:44:04 +02001778 struct scsi_device *sdev, struct scb *scb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779{
1780 struct ahd_devinfo devinfo;
Hannes Reinecke73a25462005-07-22 16:44:04 +02001781 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782
1783 ahd_compile_devinfo(&devinfo,
1784 ahd->our_id,
Hannes Reinecke73a25462005-07-22 16:44:04 +02001785 sdev->sdev_target->id, sdev->lun,
1786 sdev->sdev_target->channel == 0 ? 'A' : 'B',
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787 ROLE_INITIATOR);
1788
1789 /*
1790 * We don't currently trust the mid-layer to
1791 * properly deal with queue full or busy. So,
1792 * when one occurs, we tell the mid-layer to
1793 * unconditionally requeue the command to us
1794 * so that we can retry it ourselves. We also
1795 * implement our own throttling mechanism so
1796 * we don't clobber the device with too many
1797 * commands.
1798 */
1799 switch (ahd_get_scsi_status(scb)) {
1800 default:
1801 break;
1802 case SCSI_STATUS_CHECK_COND:
1803 case SCSI_STATUS_CMD_TERMINATED:
1804 {
Hannes Reinecke73a25462005-07-22 16:44:04 +02001805 struct scsi_cmnd *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806
1807 /*
1808 * Copy sense information to the OS's cmd
1809 * structure if it is available.
1810 */
1811 cmd = scb->io_ctx;
1812 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1813 struct scsi_status_iu_header *siu;
1814 u_int sense_size;
1815 u_int sense_offset;
1816
1817 if (scb->flags & SCB_SENSE) {
1818 sense_size = MIN(sizeof(struct scsi_sense_data)
1819 - ahd_get_sense_residual(scb),
1820 sizeof(cmd->sense_buffer));
1821 sense_offset = 0;
1822 } else {
1823 /*
1824 * Copy only the sense data into the provided
1825 * buffer.
1826 */
1827 siu = (struct scsi_status_iu_header *)
1828 scb->sense_data;
1829 sense_size = MIN(scsi_4btoul(siu->sense_length),
1830 sizeof(cmd->sense_buffer));
1831 sense_offset = SIU_SENSE_OFFSET(siu);
1832 }
1833
1834 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1835 memcpy(cmd->sense_buffer,
1836 ahd_get_sense_buf(ahd, scb)
1837 + sense_offset, sense_size);
1838 cmd->result |= (DRIVER_SENSE << 24);
1839
1840#ifdef AHD_DEBUG
1841 if (ahd_debug & AHD_SHOW_SENSE) {
1842 int i;
1843
1844 printf("Copied %d bytes of sense data at %d:",
1845 sense_size, sense_offset);
1846 for (i = 0; i < sense_size; i++) {
1847 if ((i & 0xF) == 0)
1848 printf("\n");
1849 printf("0x%x ", cmd->sense_buffer[i]);
1850 }
1851 printf("\n");
1852 }
1853#endif
1854 }
1855 break;
1856 }
1857 case SCSI_STATUS_QUEUE_FULL:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858 /*
1859 * By the time the core driver has returned this
1860 * command, all other commands that were queued
1861 * to us but not the device have been returned.
1862 * This ensures that dev->active is equal to
1863 * the number of commands actually queued to
1864 * the device.
1865 */
1866 dev->tag_success_count = 0;
1867 if (dev->active != 0) {
1868 /*
1869 * Drop our opening count to the number
1870 * of commands currently outstanding.
1871 */
1872 dev->openings = 0;
1873#ifdef AHD_DEBUG
1874 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1875 ahd_print_path(ahd, scb);
1876 printf("Dropping tag count to %d\n",
1877 dev->active);
1878 }
1879#endif
1880 if (dev->active == dev->tags_on_last_queuefull) {
1881
1882 dev->last_queuefull_same_count++;
1883 /*
1884 * If we repeatedly see a queue full
1885 * at the same queue depth, this
1886 * device has a fixed number of tag
1887 * slots. Lock in this tag depth
1888 * so we stop seeing queue fulls from
1889 * this device.
1890 */
1891 if (dev->last_queuefull_same_count
1892 == AHD_LOCK_TAGS_COUNT) {
1893 dev->maxtags = dev->active;
1894 ahd_print_path(ahd, scb);
1895 printf("Locking max tag count at %d\n",
1896 dev->active);
1897 }
1898 } else {
1899 dev->tags_on_last_queuefull = dev->active;
1900 dev->last_queuefull_same_count = 0;
1901 }
1902 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1903 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1904 ahd_platform_set_tags(ahd, &devinfo,
1905 (dev->flags & AHD_DEV_Q_BASIC)
1906 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1907 break;
1908 }
1909 /*
1910 * Drop down to a single opening, and treat this
1911 * as if the target returned BUSY SCSI status.
1912 */
1913 dev->openings = 1;
1914 ahd_platform_set_tags(ahd, &devinfo,
1915 (dev->flags & AHD_DEV_Q_BASIC)
1916 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1917 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918 }
1919}
1920
1921static void
Hannes Reinecke73a25462005-07-22 16:44:04 +02001922ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923{
1924 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001925 * Map CAM error codes into Linux Error codes. We
1926 * avoid the conversion so that the DV code has the
1927 * full error information available when making
1928 * state change decisions.
1929 */
Hannes Reinecke73a25462005-07-22 16:44:04 +02001930 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931 uint32_t status;
1932 u_int new_status;
1933
1934 status = ahd_cmd_get_transaction_status(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 switch (status) {
1936 case CAM_REQ_INPROG:
1937 case CAM_REQ_CMP:
1938 case CAM_SCSI_STATUS_ERROR:
1939 new_status = DID_OK;
1940 break;
1941 case CAM_REQ_ABORTED:
1942 new_status = DID_ABORT;
1943 break;
1944 case CAM_BUSY:
1945 new_status = DID_BUS_BUSY;
1946 break;
1947 case CAM_REQ_INVALID:
1948 case CAM_PATH_INVALID:
1949 new_status = DID_BAD_TARGET;
1950 break;
1951 case CAM_SEL_TIMEOUT:
1952 new_status = DID_NO_CONNECT;
1953 break;
1954 case CAM_SCSI_BUS_RESET:
1955 case CAM_BDR_SENT:
1956 new_status = DID_RESET;
1957 break;
1958 case CAM_UNCOR_PARITY:
1959 new_status = DID_PARITY;
1960 break;
1961 case CAM_CMD_TIMEOUT:
1962 new_status = DID_TIME_OUT;
1963 break;
1964 case CAM_UA_ABORT:
1965 case CAM_REQ_CMP_ERR:
1966 case CAM_AUTOSENSE_FAIL:
1967 case CAM_NO_HBA:
1968 case CAM_DATA_RUN_ERR:
1969 case CAM_UNEXP_BUSFREE:
1970 case CAM_SEQUENCE_FAIL:
1971 case CAM_CCB_LEN_ERR:
1972 case CAM_PROVIDE_FAIL:
1973 case CAM_REQ_TERMIO:
1974 case CAM_UNREC_HBA_ERROR:
1975 case CAM_REQ_TOO_BIG:
1976 new_status = DID_ERROR;
1977 break;
1978 case CAM_REQUEUE_REQ:
Hannes Reinecke73a25462005-07-22 16:44:04 +02001979 new_status = DID_REQUEUE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980 break;
1981 default:
1982 /* We should never get here */
1983 new_status = DID_ERROR;
1984 break;
1985 }
1986
1987 ahd_cmd_set_transaction_status(cmd, new_status);
1988 }
1989
Hannes Reinecke73a25462005-07-22 16:44:04 +02001990 cmd->scsi_done(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991}
1992
1993static void
Hannes Reinecke73a25462005-07-22 16:44:04 +02001994ahd_linux_sem_timeout(u_long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001995{
Hannes Reinecke73a25462005-07-22 16:44:04 +02001996 struct ahd_softc *ahd;
1997 u_long s;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001998
Hannes Reinecke73a25462005-07-22 16:44:04 +02001999 ahd = (struct ahd_softc *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000
Hannes Reinecke73a25462005-07-22 16:44:04 +02002001 ahd_lock(ahd, &s);
2002 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
2003 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
2004 up(&ahd->platform_data->eh_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 }
Hannes Reinecke73a25462005-07-22 16:44:04 +02002006 ahd_unlock(ahd, &s);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007}
2008
2009void
2010ahd_freeze_simq(struct ahd_softc *ahd)
2011{
2012 ahd->platform_data->qfrozen++;
2013 if (ahd->platform_data->qfrozen == 1) {
2014 scsi_block_requests(ahd->platform_data->host);
2015 ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2016 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2017 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2018 }
2019}
2020
2021void
2022ahd_release_simq(struct ahd_softc *ahd)
2023{
2024 u_long s;
2025 int unblock_reqs;
2026
2027 unblock_reqs = 0;
2028 ahd_lock(ahd, &s);
2029 if (ahd->platform_data->qfrozen > 0)
2030 ahd->platform_data->qfrozen--;
2031 if (ahd->platform_data->qfrozen == 0) {
2032 unblock_reqs = 1;
2033 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034 ahd_unlock(ahd, &s);
2035 /*
2036 * There is still a race here. The mid-layer
2037 * should keep its own freeze count and use
2038 * a bottom half handler to run the queues
2039 * so we can unblock with our own lock held.
2040 */
2041 if (unblock_reqs)
2042 scsi_unblock_requests(ahd->platform_data->host);
2043}
2044
Hannes Reinecke73a25462005-07-22 16:44:04 +02002045static int
2046ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048 struct ahd_softc *ahd;
Hannes Reinecke73a25462005-07-22 16:44:04 +02002049 struct ahd_linux_device *dev;
2050 struct scb *pending_scb;
2051 u_int saved_scbptr;
2052 u_int active_scbptr;
2053 u_int last_phase;
2054 u_int saved_scsiid;
2055 u_int cdb_byte;
2056 int retval;
2057 int was_paused;
2058 int paused;
2059 int wait;
2060 int disconnected;
2061 ahd_mode_state saved_modes;
Christoph Hellwig4065a412005-10-31 20:05:01 +01002062 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002063
Hannes Reinecke73a25462005-07-22 16:44:04 +02002064 pending_scb = NULL;
2065 paused = FALSE;
2066 wait = FALSE;
2067 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2068
Jeff Garzik017560f2005-10-24 18:04:36 -04002069 scmd_printk(KERN_INFO, cmd,
2070 "Attempting to queue a%s message:",
Hannes Reinecke73a25462005-07-22 16:44:04 +02002071 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2072
2073 printf("CDB:");
2074 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2075 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2076 printf("\n");
2077
Christoph Hellwig4065a412005-10-31 20:05:01 +01002078 ahd_lock(ahd, &flags);
Hannes Reinecke73a25462005-07-22 16:44:04 +02002079
2080 /*
2081 * First determine if we currently own this command.
2082 * Start by searching the device queue. If not found
2083 * there, check the pending_scb list. If not found
2084 * at all, and the system wanted us to just abort the
2085 * command, return success.
2086 */
2087 dev = scsi_transport_device_data(cmd->device);
2088
2089 if (dev == NULL) {
2090 /*
2091 * No target device for this command exists,
2092 * so we must not still own the command.
2093 */
Jeff Garzik017560f2005-10-24 18:04:36 -04002094 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
Hannes Reinecke73a25462005-07-22 16:44:04 +02002095 retval = SUCCESS;
2096 goto no_cmd;
2097 }
2098
2099 /*
2100 * See if we can find a matching cmd in the pending list.
2101 */
2102 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2103 if (pending_scb->io_ctx == cmd)
2104 break;
2105 }
2106
2107 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2108
2109 /* Any SCB for this device will do for a target reset */
2110 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
Jeff Garzik422c0d62005-10-24 18:05:09 -04002111 if (ahd_match_scb(ahd, pending_scb,
2112 scmd_id(cmd),
2113 scmd_channel(cmd) + 'A',
Hannes Reinecke73a25462005-07-22 16:44:04 +02002114 CAM_LUN_WILDCARD,
Vasily Averindce20062005-11-27 20:15:06 +03002115 SCB_LIST_NULL, ROLE_INITIATOR))
Hannes Reinecke73a25462005-07-22 16:44:04 +02002116 break;
2117 }
2118 }
2119
2120 if (pending_scb == NULL) {
Jeff Garzik017560f2005-10-24 18:04:36 -04002121 scmd_printk(KERN_INFO, cmd, "Command not found\n");
Hannes Reinecke73a25462005-07-22 16:44:04 +02002122 goto no_cmd;
2123 }
2124
2125 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2126 /*
2127 * We can't queue two recovery actions using the same SCB
2128 */
2129 retval = FAILED;
2130 goto done;
2131 }
2132
2133 /*
2134 * Ensure that the card doesn't do anything
2135 * behind our back. Also make sure that we
2136 * didn't "just" miss an interrupt that would
2137 * affect this cmd.
2138 */
2139 was_paused = ahd_is_paused(ahd);
2140 ahd_pause_and_flushwork(ahd);
2141 paused = TRUE;
2142
2143 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
Jeff Garzik017560f2005-10-24 18:04:36 -04002144 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
Hannes Reinecke73a25462005-07-22 16:44:04 +02002145 goto no_cmd;
2146 }
2147
2148 printf("%s: At time of recovery, card was %spaused\n",
2149 ahd_name(ahd), was_paused ? "" : "not ");
2150 ahd_dump_card_state(ahd);
2151
2152 disconnected = TRUE;
2153 if (flag == SCB_ABORT) {
2154 if (ahd_search_qinfifo(ahd, cmd->device->id,
2155 cmd->device->channel + 'A',
2156 cmd->device->lun,
2157 pending_scb->hscb->tag,
2158 ROLE_INITIATOR, CAM_REQ_ABORTED,
2159 SEARCH_COMPLETE) > 0) {
2160 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2161 ahd_name(ahd), cmd->device->channel,
2162 cmd->device->id, cmd->device->lun);
2163 retval = SUCCESS;
2164 goto done;
2165 }
2166 } else if (ahd_search_qinfifo(ahd, cmd->device->id,
2167 cmd->device->channel + 'A',
2168 cmd->device->lun, pending_scb->hscb->tag,
2169 ROLE_INITIATOR, /*status*/0,
2170 SEARCH_COUNT) > 0) {
2171 disconnected = FALSE;
2172 }
2173
2174 saved_modes = ahd_save_modes(ahd);
2175 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2176 last_phase = ahd_inb(ahd, LASTPHASE);
2177 saved_scbptr = ahd_get_scbptr(ahd);
2178 active_scbptr = saved_scbptr;
2179 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2180 struct scb *bus_scb;
2181
2182 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2183 if (bus_scb == pending_scb)
2184 disconnected = FALSE;
2185 else if (flag != SCB_ABORT
2186 && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
2187 && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2188 disconnected = FALSE;
2189 }
2190
2191 /*
2192 * At this point, pending_scb is the scb associated with the
2193 * passed in command. That command is currently active on the
2194 * bus or is in the disconnected state.
2195 */
2196 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2197 if (last_phase != P_BUSFREE
2198 && (SCB_GET_TAG(pending_scb) == active_scbptr
2199 || (flag == SCB_DEVICE_RESET
Jeff Garzik422c0d62005-10-24 18:05:09 -04002200 && SCSIID_TARGET(ahd, saved_scsiid) == scmd_id(cmd)))) {
Hannes Reinecke73a25462005-07-22 16:44:04 +02002201
2202 /*
2203 * We're active on the bus, so assert ATN
2204 * and hope that the target responds.
2205 */
2206 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2207 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2208 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2209 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
Jeff Garzik017560f2005-10-24 18:04:36 -04002210 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
Hannes Reinecke73a25462005-07-22 16:44:04 +02002211 wait = TRUE;
2212 } else if (disconnected) {
2213
2214 /*
2215 * Actually re-queue this SCB in an attempt
2216 * to select the device before it reconnects.
2217 */
2218 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2219 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2220 pending_scb->hscb->cdb_len = 0;
2221 pending_scb->hscb->task_attribute = 0;
2222 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2223
2224 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2225 /*
2226 * Mark the SCB has having an outstanding
2227 * task management function. Should the command
2228 * complete normally before the task management
2229 * function can be sent, the host will be notified
2230 * to abort our requeued SCB.
2231 */
2232 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2233 pending_scb->hscb->task_management);
2234 } else {
2235 /*
2236 * If non-packetized, set the MK_MESSAGE control
2237 * bit indicating that we desire to send a message.
2238 * We also set the disconnected flag since there is
2239 * no guarantee that our SCB control byte matches
2240 * the version on the card. We don't want the
2241 * sequencer to abort the command thinking an
2242 * unsolicited reselection occurred.
2243 */
2244 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2245
2246 /*
2247 * The sequencer will never re-reference the
2248 * in-core SCB. To make sure we are notified
2249 * during reslection, set the MK_MESSAGE flag in
2250 * the card's copy of the SCB.
2251 */
2252 ahd_outb(ahd, SCB_CONTROL,
2253 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2254 }
2255
2256 /*
2257 * Clear out any entries in the QINFIFO first
2258 * so we are the next SCB for this target
2259 * to run.
2260 */
2261 ahd_search_qinfifo(ahd, cmd->device->id,
2262 cmd->device->channel + 'A', cmd->device->lun,
2263 SCB_LIST_NULL, ROLE_INITIATOR,
2264 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2265 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2266 ahd_set_scbptr(ahd, saved_scbptr);
2267 ahd_print_path(ahd, pending_scb);
2268 printf("Device is disconnected, re-queuing SCB\n");
2269 wait = TRUE;
2270 } else {
Jeff Garzik017560f2005-10-24 18:04:36 -04002271 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
Hannes Reinecke73a25462005-07-22 16:44:04 +02002272 retval = FAILED;
2273 goto done;
2274 }
2275
2276no_cmd:
2277 /*
2278 * Our assumption is that if we don't have the command, no
2279 * recovery action was required, so we return success. Again,
2280 * the semantics of the mid-layer recovery engine are not
2281 * well defined, so this may change in time.
2282 */
2283 retval = SUCCESS;
2284done:
2285 if (paused)
2286 ahd_unpause(ahd);
2287 if (wait) {
2288 struct timer_list timer;
2289 int ret;
2290
2291 ahd->platform_data->flags |= AHD_SCB_UP_EH_SEM;
Christoph Hellwig4065a412005-10-31 20:05:01 +01002292 ahd_unlock(ahd, &flags);
2293
Hannes Reinecke73a25462005-07-22 16:44:04 +02002294 init_timer(&timer);
2295 timer.data = (u_long)ahd;
2296 timer.expires = jiffies + (5 * HZ);
2297 timer.function = ahd_linux_sem_timeout;
2298 add_timer(&timer);
2299 printf("Recovery code sleeping\n");
2300 down(&ahd->platform_data->eh_sem);
2301 printf("Recovery code awake\n");
2302 ret = del_timer_sync(&timer);
2303 if (ret == 0) {
2304 printf("Timer Expired\n");
2305 retval = FAILED;
2306 }
Hannes Reinecke73a25462005-07-22 16:44:04 +02002307 }
Christoph Hellwig4065a412005-10-31 20:05:01 +01002308 ahd_unlock(ahd, &flags);
Hannes Reinecke73a25462005-07-22 16:44:04 +02002309 return (retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002310}
2311
Hannes Reinecke73a25462005-07-22 16:44:04 +02002312static void ahd_linux_set_width(struct scsi_target *starget, int width)
2313{
2314 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2315 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2316 struct ahd_devinfo devinfo;
2317 unsigned long flags;
2318
2319 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2320 starget->channel + 'A', ROLE_INITIATOR);
2321 ahd_lock(ahd, &flags);
2322 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2323 ahd_unlock(ahd, &flags);
2324}
2325
2326static void ahd_linux_set_period(struct scsi_target *starget, int period)
2327{
2328 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2329 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2330 struct ahd_tmode_tstate *tstate;
2331 struct ahd_initiator_tinfo *tinfo
2332 = ahd_fetch_transinfo(ahd,
2333 starget->channel + 'A',
2334 shost->this_id, starget->id, &tstate);
2335 struct ahd_devinfo devinfo;
2336 unsigned int ppr_options = tinfo->goal.ppr_options;
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002337 unsigned int dt;
Hannes Reinecke73a25462005-07-22 16:44:04 +02002338 unsigned long flags;
2339 unsigned long offset = tinfo->goal.offset;
2340
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002341#ifdef AHD_DEBUG
2342 if ((ahd_debug & AHD_SHOW_DV) != 0)
2343 printf("%s: set period to %d\n", ahd_name(ahd), period);
2344#endif
Hannes Reinecke73a25462005-07-22 16:44:04 +02002345 if (offset == 0)
2346 offset = MAX_OFFSET;
2347
2348 if (period < 8)
2349 period = 8;
2350 if (period < 10) {
2351 ppr_options |= MSG_EXT_PPR_DT_REQ;
2352 if (period == 8)
2353 ppr_options |= MSG_EXT_PPR_IU_REQ;
2354 }
2355
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002356 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2357
Hannes Reinecke73a25462005-07-22 16:44:04 +02002358 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2359 starget->channel + 'A', ROLE_INITIATOR);
2360
2361 /* all PPR requests apart from QAS require wide transfers */
2362 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2363 if (spi_width(starget) == 0)
2364 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2365 }
2366
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002367 ahd_find_syncrate(ahd, &period, &ppr_options,
2368 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2369
Hannes Reinecke73a25462005-07-22 16:44:04 +02002370 ahd_lock(ahd, &flags);
2371 ahd_set_syncrate(ahd, &devinfo, period, offset,
2372 ppr_options, AHD_TRANS_GOAL, FALSE);
2373 ahd_unlock(ahd, &flags);
2374}
2375
2376static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2377{
2378 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2379 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2380 struct ahd_tmode_tstate *tstate;
2381 struct ahd_initiator_tinfo *tinfo
2382 = ahd_fetch_transinfo(ahd,
2383 starget->channel + 'A',
2384 shost->this_id, starget->id, &tstate);
2385 struct ahd_devinfo devinfo;
2386 unsigned int ppr_options = 0;
2387 unsigned int period = 0;
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002388 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
Hannes Reinecke73a25462005-07-22 16:44:04 +02002389 unsigned long flags;
2390
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002391#ifdef AHD_DEBUG
2392 if ((ahd_debug & AHD_SHOW_DV) != 0)
2393 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2394#endif
2395
Hannes Reinecke73a25462005-07-22 16:44:04 +02002396 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2397 starget->channel + 'A', ROLE_INITIATOR);
2398 if (offset != 0) {
2399 period = tinfo->goal.period;
2400 ppr_options = tinfo->goal.ppr_options;
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002401 ahd_find_syncrate(ahd, &period, &ppr_options,
2402 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
Hannes Reinecke73a25462005-07-22 16:44:04 +02002403 }
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002404
Hannes Reinecke73a25462005-07-22 16:44:04 +02002405 ahd_lock(ahd, &flags);
2406 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2407 AHD_TRANS_GOAL, FALSE);
2408 ahd_unlock(ahd, &flags);
2409}
2410
2411static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2412{
2413 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2414 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2415 struct ahd_tmode_tstate *tstate;
2416 struct ahd_initiator_tinfo *tinfo
2417 = ahd_fetch_transinfo(ahd,
2418 starget->channel + 'A',
2419 shost->this_id, starget->id, &tstate);
2420 struct ahd_devinfo devinfo;
2421 unsigned int ppr_options = tinfo->goal.ppr_options
2422 & ~MSG_EXT_PPR_DT_REQ;
2423 unsigned int period = tinfo->goal.period;
Hannes Reinecke52b5cfb2005-08-04 09:16:59 +02002424 unsigned int width = tinfo->goal.width;
Hannes Reinecke73a25462005-07-22 16:44:04 +02002425 unsigned long flags;
2426
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002427#ifdef AHD_DEBUG
2428 if ((ahd_debug & AHD_SHOW_DV) != 0)
2429 printf("%s: %s DT\n", ahd_name(ahd),
2430 dt ? "enabling" : "disabling");
2431#endif
Hannes Reinecke73a25462005-07-22 16:44:04 +02002432 if (dt) {
2433 ppr_options |= MSG_EXT_PPR_DT_REQ;
Hannes Reinecke52b5cfb2005-08-04 09:16:59 +02002434 if (!width)
2435 ahd_linux_set_width(starget, 1);
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002436 } else {
2437 if (period <= 9)
2438 period = 10; /* If resetting DT, period must be >= 25ns */
2439 /* IU is invalid without DT set */
2440 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2441 }
Hannes Reinecke73a25462005-07-22 16:44:04 +02002442 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2443 starget->channel + 'A', ROLE_INITIATOR);
2444 ahd_find_syncrate(ahd, &period, &ppr_options,
2445 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002446
Hannes Reinecke73a25462005-07-22 16:44:04 +02002447 ahd_lock(ahd, &flags);
2448 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2449 ppr_options, AHD_TRANS_GOAL, FALSE);
2450 ahd_unlock(ahd, &flags);
2451}
2452
2453static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2454{
2455 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2456 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2457 struct ahd_tmode_tstate *tstate;
2458 struct ahd_initiator_tinfo *tinfo
2459 = ahd_fetch_transinfo(ahd,
2460 starget->channel + 'A',
2461 shost->this_id, starget->id, &tstate);
2462 struct ahd_devinfo devinfo;
2463 unsigned int ppr_options = tinfo->goal.ppr_options
2464 & ~MSG_EXT_PPR_QAS_REQ;
2465 unsigned int period = tinfo->goal.period;
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002466 unsigned int dt;
Hannes Reinecke73a25462005-07-22 16:44:04 +02002467 unsigned long flags;
2468
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002469#ifdef AHD_DEBUG
2470 if ((ahd_debug & AHD_SHOW_DV) != 0)
2471 printf("%s: %s QAS\n", ahd_name(ahd),
2472 qas ? "enabling" : "disabling");
2473#endif
2474
2475 if (qas) {
2476 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2477 }
2478
2479 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
Hannes Reinecke73a25462005-07-22 16:44:04 +02002480
2481 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2482 starget->channel + 'A', ROLE_INITIATOR);
2483 ahd_find_syncrate(ahd, &period, &ppr_options,
2484 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002485
Hannes Reinecke73a25462005-07-22 16:44:04 +02002486 ahd_lock(ahd, &flags);
2487 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2488 ppr_options, AHD_TRANS_GOAL, FALSE);
2489 ahd_unlock(ahd, &flags);
2490}
2491
2492static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2493{
2494 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2495 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2496 struct ahd_tmode_tstate *tstate;
2497 struct ahd_initiator_tinfo *tinfo
2498 = ahd_fetch_transinfo(ahd,
2499 starget->channel + 'A',
2500 shost->this_id, starget->id, &tstate);
2501 struct ahd_devinfo devinfo;
2502 unsigned int ppr_options = tinfo->goal.ppr_options
2503 & ~MSG_EXT_PPR_IU_REQ;
2504 unsigned int period = tinfo->goal.period;
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002505 unsigned int dt;
Hannes Reinecke73a25462005-07-22 16:44:04 +02002506 unsigned long flags;
2507
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002508#ifdef AHD_DEBUG
2509 if ((ahd_debug & AHD_SHOW_DV) != 0)
2510 printf("%s: %s IU\n", ahd_name(ahd),
2511 iu ? "enabling" : "disabling");
2512#endif
2513
2514 if (iu) {
Hannes Reinecke73a25462005-07-22 16:44:04 +02002515 ppr_options |= MSG_EXT_PPR_IU_REQ;
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002516 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2517 }
2518
2519 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
Hannes Reinecke73a25462005-07-22 16:44:04 +02002520
2521 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2522 starget->channel + 'A', ROLE_INITIATOR);
2523 ahd_find_syncrate(ahd, &period, &ppr_options,
2524 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002525
Hannes Reinecke73a25462005-07-22 16:44:04 +02002526 ahd_lock(ahd, &flags);
2527 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2528 ppr_options, AHD_TRANS_GOAL, FALSE);
2529 ahd_unlock(ahd, &flags);
2530}
2531
2532static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2533{
2534 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2535 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2536 struct ahd_tmode_tstate *tstate;
2537 struct ahd_initiator_tinfo *tinfo
2538 = ahd_fetch_transinfo(ahd,
2539 starget->channel + 'A',
2540 shost->this_id, starget->id, &tstate);
2541 struct ahd_devinfo devinfo;
2542 unsigned int ppr_options = tinfo->goal.ppr_options
2543 & ~MSG_EXT_PPR_RD_STRM;
2544 unsigned int period = tinfo->goal.period;
2545 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2546 unsigned long flags;
2547
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002548#ifdef AHD_DEBUG
2549 if ((ahd_debug & AHD_SHOW_DV) != 0)
2550 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2551 rdstrm ? "enabling" : "disabling");
2552#endif
2553
Hannes Reinecke73a25462005-07-22 16:44:04 +02002554 if (rdstrm)
2555 ppr_options |= MSG_EXT_PPR_RD_STRM;
2556
2557 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2558 starget->channel + 'A', ROLE_INITIATOR);
2559 ahd_find_syncrate(ahd, &period, &ppr_options,
2560 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002561
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002562 ahd_lock(ahd, &flags);
2563 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2564 ppr_options, AHD_TRANS_GOAL, FALSE);
2565 ahd_unlock(ahd, &flags);
2566}
2567
2568static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2569{
2570 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2571 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2572 struct ahd_tmode_tstate *tstate;
2573 struct ahd_initiator_tinfo *tinfo
2574 = ahd_fetch_transinfo(ahd,
2575 starget->channel + 'A',
2576 shost->this_id, starget->id, &tstate);
2577 struct ahd_devinfo devinfo;
2578 unsigned int ppr_options = tinfo->goal.ppr_options
2579 & ~MSG_EXT_PPR_WR_FLOW;
2580 unsigned int period = tinfo->goal.period;
2581 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2582 unsigned long flags;
2583
2584#ifdef AHD_DEBUG
2585 if ((ahd_debug & AHD_SHOW_DV) != 0)
2586 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2587 wrflow ? "enabling" : "disabling");
2588#endif
2589
2590 if (wrflow)
2591 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2592
2593 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2594 starget->channel + 'A', ROLE_INITIATOR);
2595 ahd_find_syncrate(ahd, &period, &ppr_options,
2596 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2597
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002598 ahd_lock(ahd, &flags);
2599 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2600 ppr_options, AHD_TRANS_GOAL, FALSE);
2601 ahd_unlock(ahd, &flags);
2602}
2603
2604static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2605{
2606 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2607 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2608 struct ahd_tmode_tstate *tstate;
2609 struct ahd_initiator_tinfo *tinfo
2610 = ahd_fetch_transinfo(ahd,
2611 starget->channel + 'A',
2612 shost->this_id, starget->id, &tstate);
2613 struct ahd_devinfo devinfo;
2614 unsigned int ppr_options = tinfo->goal.ppr_options
2615 & ~MSG_EXT_PPR_RTI;
2616 unsigned int period = tinfo->goal.period;
2617 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2618 unsigned long flags;
2619
2620 if ((ahd->features & AHD_RTI) == 0) {
2621#ifdef AHD_DEBUG
2622 if ((ahd_debug & AHD_SHOW_DV) != 0)
2623 printf("%s: RTI not available\n", ahd_name(ahd));
2624#endif
2625 return;
2626 }
2627
2628#ifdef AHD_DEBUG
2629 if ((ahd_debug & AHD_SHOW_DV) != 0)
2630 printf("%s: %s RTI\n", ahd_name(ahd),
2631 rti ? "enabling" : "disabling");
2632#endif
2633
2634 if (rti)
2635 ppr_options |= MSG_EXT_PPR_RTI;
2636
2637 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2638 starget->channel + 'A', ROLE_INITIATOR);
2639 ahd_find_syncrate(ahd, &period, &ppr_options,
2640 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2641
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002642 ahd_lock(ahd, &flags);
2643 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2644 ppr_options, AHD_TRANS_GOAL, FALSE);
2645 ahd_unlock(ahd, &flags);
2646}
2647
2648static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2649{
2650 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2651 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2652 struct ahd_tmode_tstate *tstate;
2653 struct ahd_initiator_tinfo *tinfo
2654 = ahd_fetch_transinfo(ahd,
2655 starget->channel + 'A',
2656 shost->this_id, starget->id, &tstate);
2657 struct ahd_devinfo devinfo;
2658 unsigned int ppr_options = tinfo->goal.ppr_options
2659 & ~MSG_EXT_PPR_PCOMP_EN;
2660 unsigned int period = tinfo->goal.period;
2661 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2662 unsigned long flags;
2663
2664#ifdef AHD_DEBUG
2665 if ((ahd_debug & AHD_SHOW_DV) != 0)
2666 printf("%s: %s Precompensation\n", ahd_name(ahd),
2667 pcomp ? "Enable" : "Disable");
2668#endif
2669
2670 if (pcomp)
2671 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2672
2673 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2674 starget->channel + 'A', ROLE_INITIATOR);
2675 ahd_find_syncrate(ahd, &period, &ppr_options,
2676 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2677
Hannes Reinecke73a25462005-07-22 16:44:04 +02002678 ahd_lock(ahd, &flags);
2679 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2680 ppr_options, AHD_TRANS_GOAL, FALSE);
2681 ahd_unlock(ahd, &flags);
2682}
2683
James Bottomley88ff29a2005-08-03 15:59:04 -05002684static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2685{
2686 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2687 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2688 struct ahd_tmode_tstate *tstate;
2689 struct ahd_initiator_tinfo *tinfo
2690 = ahd_fetch_transinfo(ahd,
2691 starget->channel + 'A',
2692 shost->this_id, starget->id, &tstate);
2693 struct ahd_devinfo devinfo;
2694 unsigned int ppr_options = tinfo->goal.ppr_options
2695 & ~MSG_EXT_PPR_HOLD_MCS;
2696 unsigned int period = tinfo->goal.period;
2697 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2698 unsigned long flags;
2699
2700 if (hold)
2701 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2702
2703 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2704 starget->channel + 'A', ROLE_INITIATOR);
2705 ahd_find_syncrate(ahd, &period, &ppr_options,
2706 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2707
2708 ahd_lock(ahd, &flags);
2709 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2710 ppr_options, AHD_TRANS_GOAL, FALSE);
2711 ahd_unlock(ahd, &flags);
2712}
2713
2714
2715
Hannes Reinecke73a25462005-07-22 16:44:04 +02002716static struct spi_function_template ahd_linux_transport_functions = {
2717 .set_offset = ahd_linux_set_offset,
2718 .show_offset = 1,
2719 .set_period = ahd_linux_set_period,
2720 .show_period = 1,
2721 .set_width = ahd_linux_set_width,
2722 .show_width = 1,
2723 .set_dt = ahd_linux_set_dt,
2724 .show_dt = 1,
2725 .set_iu = ahd_linux_set_iu,
2726 .show_iu = 1,
2727 .set_qas = ahd_linux_set_qas,
2728 .show_qas = 1,
2729 .set_rd_strm = ahd_linux_set_rd_strm,
2730 .show_rd_strm = 1,
Hannes Reineckea4b53a12005-08-01 09:52:56 +02002731 .set_wr_flow = ahd_linux_set_wr_flow,
2732 .show_wr_flow = 1,
2733 .set_rti = ahd_linux_set_rti,
2734 .show_rti = 1,
2735 .set_pcomp_en = ahd_linux_set_pcomp_en,
2736 .show_pcomp_en = 1,
James Bottomley88ff29a2005-08-03 15:59:04 -05002737 .set_hold_mcs = ahd_linux_set_hold_mcs,
2738 .show_hold_mcs = 1,
Hannes Reinecke73a25462005-07-22 16:44:04 +02002739};
2740
Linus Torvalds1da177e2005-04-16 15:20:36 -07002741static int __init
2742ahd_linux_init(void)
2743{
Christoph Hellwig85a46522005-08-15 13:28:46 +02002744 int error = 0;
2745
2746 /*
2747 * If we've been passed any parameters, process them now.
2748 */
2749 if (aic79xx)
2750 aic79xx_setup(aic79xx);
2751
2752 ahd_linux_transport_template =
2753 spi_attach_transport(&ahd_linux_transport_functions);
Hannes Reinecke73a25462005-07-22 16:44:04 +02002754 if (!ahd_linux_transport_template)
2755 return -ENODEV;
Christoph Hellwig85a46522005-08-15 13:28:46 +02002756
Hannes Reinecke73a25462005-07-22 16:44:04 +02002757 scsi_transport_reserve_target(ahd_linux_transport_template,
2758 sizeof(struct ahd_linux_target));
2759 scsi_transport_reserve_device(ahd_linux_transport_template,
2760 sizeof(struct ahd_linux_device));
James Bottomleya80b3422005-08-08 19:06:50 -05002761
Christoph Hellwig85a46522005-08-15 13:28:46 +02002762 error = ahd_linux_pci_init();
2763 if (error)
2764 spi_release_transport(ahd_linux_transport_template);
2765 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002766}
2767
2768static void __exit
2769ahd_linux_exit(void)
2770{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002771 ahd_linux_pci_exit();
Hannes Reinecke73a25462005-07-22 16:44:04 +02002772 spi_release_transport(ahd_linux_transport_template);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002773}
2774
2775module_init(ahd_linux_init);
2776module_exit(ahd_linux_exit);