blob: e5a2571a3671f00b585b537ae65aa297ed9108a0 [file] [log] [blame]
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001/*
2 * SBP2 driver (SCSI over IEEE1394)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05003 *
Kristian Høgsberg27a15e52007-02-06 14:49:39 -05004 * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05005 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
Kristian Høgsbergc781c062007-05-07 20:33:32 -040021/*
22 * The basic structure of this driver is based on the old storage driver,
Kristian Høgsberg27a15e52007-02-06 14:49:39 -050023 * drivers/ieee1394/sbp2.c, originally written by
24 * James Goodwin <jamesg@filanet.com>
25 * with later contributions and ongoing maintenance from
26 * Ben Collins <bcollins@debian.org>,
27 * Stefan Richter <stefanr@s5r6.in-berlin.de>
28 * and many others.
29 */
30
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050031#include <linux/kernel.h>
32#include <linux/module.h>
Stefan Richter5cd54c92007-06-17 23:55:41 +020033#include <linux/moduleparam.h>
Stefan Richterfe69ca32006-12-28 12:46:54 +010034#include <linux/mod_devicetable.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050035#include <linux/device.h>
Andrew Morton0b5b2902006-12-27 14:49:23 -080036#include <linux/scatterlist.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050037#include <linux/dma-mapping.h>
Stefan Richtercf47c7a2007-06-17 23:52:08 +020038#include <linux/blkdev.h>
Stefan Richtere7cdf232007-07-01 13:54:57 +020039#include <linux/string.h>
Stefan Richter2df222b2007-08-13 17:48:25 +020040#include <linux/stringify.h>
Kristian Høgsberg1d3d52c2007-02-06 14:49:33 -050041#include <linux/timer.h>
Stefan Richterdf8ec242007-08-12 12:51:18 +020042#include <linux/workqueue.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050043
44#include <scsi/scsi.h>
45#include <scsi/scsi_cmnd.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050046#include <scsi/scsi_device.h>
47#include <scsi/scsi_host.h>
48
49#include "fw-transaction.h"
50#include "fw-topology.h"
51#include "fw-device.h"
52
Stefan Richter5cd54c92007-06-17 23:55:41 +020053/*
54 * So far only bridges from Oxford Semiconductor are known to support
55 * concurrent logins. Depending on firmware, four or two concurrent logins
56 * are possible on OXFW911 and newer Oxsemi bridges.
57 *
58 * Concurrent logins are useful together with cluster filesystems.
59 */
60static int sbp2_param_exclusive_login = 1;
61module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644);
62MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
63 "(default = Y, use N for concurrent initiators)");
64
Stefan Richter2df222b2007-08-13 17:48:25 +020065/*
66 * Flags for firmware oddities
67 *
68 * - 128kB max transfer
69 * Limit transfer size. Necessary for some old bridges.
70 *
71 * - 36 byte inquiry
72 * When scsi_mod probes the device, let the inquiry command look like that
73 * from MS Windows.
74 *
75 * - skip mode page 8
76 * Suppress sending of mode_sense for mode page 8 if the device pretends to
77 * support the SCSI Primary Block commands instead of Reduced Block Commands.
78 *
79 * - fix capacity
80 * Tell sd_mod to correct the last sector number reported by read_capacity.
81 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
82 * Don't use this with devices which don't have this bug.
83 *
84 * - override internal blacklist
85 * Instead of adding to the built-in blacklist, use only the workarounds
86 * specified in the module load parameter.
87 * Useful if a blacklist entry interfered with a non-broken device.
88 */
89#define SBP2_WORKAROUND_128K_MAX_TRANS 0x1
90#define SBP2_WORKAROUND_INQUIRY_36 0x2
91#define SBP2_WORKAROUND_MODE_SENSE_8 0x4
92#define SBP2_WORKAROUND_FIX_CAPACITY 0x8
93#define SBP2_WORKAROUND_OVERRIDE 0x100
94
95static int sbp2_param_workarounds;
96module_param_named(workarounds, sbp2_param_workarounds, int, 0644);
97MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
98 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
99 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
100 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
101 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
102 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
103 ", or a combination)");
104
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500105/* I don't know why the SCSI stack doesn't define something like this... */
Kristian Høgsberga98e2712007-05-07 20:33:34 -0400106typedef void (*scsi_done_fn_t)(struct scsi_cmnd *);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500107
108static const char sbp2_driver_name[] = "sbp2";
109
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200110/*
111 * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry
112 * and one struct scsi_device per sbp2_logical_unit.
113 */
114struct sbp2_logical_unit {
115 struct sbp2_target *tgt;
116 struct list_head link;
117 struct scsi_device *sdev;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500118 struct fw_address_handler address_handler;
119 struct list_head orb_list;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200120
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500121 u64 command_block_agent_address;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200122 u16 lun;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500123 int login_id;
124
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400125 /*
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200126 * The generation is updated once we've logged in or reconnected
127 * to the logical unit. Thus, I/O to the device will automatically
128 * fail and get retried if it happens in a window where the device
129 * is not ready, e.g. after a bus reset but before we reconnect.
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400130 */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500131 int generation;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500132 int retries;
133 struct delayed_work work;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500134};
135
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200136/*
137 * We create one struct sbp2_target per IEEE 1212 Unit Directory
138 * and one struct Scsi_Host per sbp2_target.
139 */
140struct sbp2_target {
141 struct kref kref;
142 struct fw_unit *unit;
143
144 u64 management_agent_address;
145 int directory_id;
146 int node_id;
147 int address_high;
148
149 unsigned workarounds;
150 struct list_head lu_list;
151};
152
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500153#define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000
Kristian Høgsberg1d3d52c2007-02-06 14:49:33 -0500154#define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500155#define SBP2_ORB_NULL 0x80000000
156
157#define SBP2_DIRECTION_TO_MEDIA 0x0
158#define SBP2_DIRECTION_FROM_MEDIA 0x1
159
160/* Unit directory keys */
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200161#define SBP2_CSR_FIRMWARE_REVISION 0x3c
162#define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14
163#define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500164
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500165/* Management orb opcodes */
166#define SBP2_LOGIN_REQUEST 0x0
167#define SBP2_QUERY_LOGINS_REQUEST 0x1
168#define SBP2_RECONNECT_REQUEST 0x3
169#define SBP2_SET_PASSWORD_REQUEST 0x4
170#define SBP2_LOGOUT_REQUEST 0x7
171#define SBP2_ABORT_TASK_REQUEST 0xb
172#define SBP2_ABORT_TASK_SET 0xc
173#define SBP2_LOGICAL_UNIT_RESET 0xe
174#define SBP2_TARGET_RESET_REQUEST 0xf
175
176/* Offsets for command block agent registers */
177#define SBP2_AGENT_STATE 0x00
178#define SBP2_AGENT_RESET 0x04
179#define SBP2_ORB_POINTER 0x08
180#define SBP2_DOORBELL 0x10
181#define SBP2_UNSOLICITED_STATUS_ENABLE 0x14
182
183/* Status write response codes */
184#define SBP2_STATUS_REQUEST_COMPLETE 0x0
185#define SBP2_STATUS_TRANSPORT_FAILURE 0x1
186#define SBP2_STATUS_ILLEGAL_REQUEST 0x2
187#define SBP2_STATUS_VENDOR_DEPENDENT 0x3
188
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400189#define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff)
190#define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff)
191#define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07)
192#define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01)
193#define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03)
194#define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03)
195#define STATUS_GET_ORB_LOW(v) ((v).orb_low)
196#define STATUS_GET_DATA(v) ((v).data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500197
198struct sbp2_status {
199 u32 status;
200 u32 orb_low;
201 u8 data[24];
202};
203
204struct sbp2_pointer {
205 u32 high;
206 u32 low;
207};
208
209struct sbp2_orb {
210 struct fw_transaction t;
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400211 struct kref kref;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500212 dma_addr_t request_bus;
213 int rcode;
214 struct sbp2_pointer pointer;
Kristian Høgsberga98e2712007-05-07 20:33:34 -0400215 void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500216 struct list_head link;
217};
218
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400219#define MANAGEMENT_ORB_LUN(v) ((v))
220#define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16)
221#define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20)
Stefan Richter5cd54c92007-06-17 23:55:41 +0200222#define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0)
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400223#define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29)
224#define MANAGEMENT_ORB_NOTIFY ((1) << 31)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500225
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400226#define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v))
227#define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500228
229struct sbp2_management_orb {
230 struct sbp2_orb base;
231 struct {
232 struct sbp2_pointer password;
233 struct sbp2_pointer response;
234 u32 misc;
235 u32 length;
236 struct sbp2_pointer status_fifo;
237 } request;
238 __be32 response[4];
239 dma_addr_t response_bus;
240 struct completion done;
241 struct sbp2_status status;
242};
243
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400244#define LOGIN_RESPONSE_GET_LOGIN_ID(v) ((v).misc & 0xffff)
245#define LOGIN_RESPONSE_GET_LENGTH(v) (((v).misc >> 16) & 0xffff)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500246
247struct sbp2_login_response {
248 u32 misc;
249 struct sbp2_pointer command_block_agent;
250 u32 reconnect_hold;
251};
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400252#define COMMAND_ORB_DATA_SIZE(v) ((v))
253#define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16)
254#define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19)
255#define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20)
256#define COMMAND_ORB_SPEED(v) ((v) << 24)
257#define COMMAND_ORB_DIRECTION(v) ((v) << 27)
258#define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29)
259#define COMMAND_ORB_NOTIFY ((1) << 31)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500260
261struct sbp2_command_orb {
262 struct sbp2_orb base;
263 struct {
264 struct sbp2_pointer next;
265 struct sbp2_pointer data_descriptor;
266 u32 misc;
267 u8 command_block[12];
268 } request;
269 struct scsi_cmnd *cmd;
270 scsi_done_fn_t done;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200271 struct sbp2_logical_unit *lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500272
Stefan Richter9fb2dd12007-07-01 13:55:31 +0200273 struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8)));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500274 dma_addr_t page_table_bus;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500275};
276
277/*
278 * List of devices with known bugs.
279 *
280 * The firmware_revision field, masked with 0xffff00, is the best
281 * indicator for the type of bridge chip of a device. It yields a few
282 * false positives but this did not break correctly behaving devices
283 * so far. We use ~0 as a wildcard, since the 24 bit values we get
284 * from the config rom can never match that.
285 */
286static const struct {
287 u32 firmware_revision;
288 u32 model;
289 unsigned workarounds;
290} sbp2_workarounds_table[] = {
291 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
292 .firmware_revision = 0x002800,
293 .model = 0x001010,
294 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
295 SBP2_WORKAROUND_MODE_SENSE_8,
296 },
297 /* Initio bridges, actually only needed for some older ones */ {
298 .firmware_revision = 0x000200,
299 .model = ~0,
300 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
301 },
302 /* Symbios bridge */ {
303 .firmware_revision = 0xa0b800,
304 .model = ~0,
305 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
306 },
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400307
308 /*
309 * There are iPods (2nd gen, 3rd gen) with model_id == 0, but
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500310 * these iPods do not feature the read_capacity bug according
311 * to one report. Read_capacity behaviour as well as model_id
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400312 * could change due to Apple-supplied firmware updates though.
313 */
314
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500315 /* iPod 4th generation. */ {
316 .firmware_revision = 0x0a2700,
317 .model = 0x000021,
318 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
319 },
320 /* iPod mini */ {
321 .firmware_revision = 0x0a2700,
322 .model = 0x000023,
323 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
324 },
325 /* iPod Photo */ {
326 .firmware_revision = 0x0a2700,
327 .model = 0x00007e,
328 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
329 }
330};
331
332static void
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400333free_orb(struct kref *kref)
334{
335 struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref);
336
337 kfree(orb);
338}
339
340static void
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500341sbp2_status_write(struct fw_card *card, struct fw_request *request,
342 int tcode, int destination, int source,
343 int generation, int speed,
344 unsigned long long offset,
345 void *payload, size_t length, void *callback_data)
346{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200347 struct sbp2_logical_unit *lu = callback_data;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500348 struct sbp2_orb *orb;
349 struct sbp2_status status;
350 size_t header_size;
351 unsigned long flags;
352
353 if (tcode != TCODE_WRITE_BLOCK_REQUEST ||
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400354 length == 0 || length > sizeof(status)) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500355 fw_send_response(card, request, RCODE_TYPE_ERROR);
356 return;
357 }
358
359 header_size = min(length, 2 * sizeof(u32));
360 fw_memcpy_from_be32(&status, payload, header_size);
361 if (length > header_size)
362 memcpy(status.data, payload + 8, length - header_size);
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400363 if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500364 fw_notify("non-orb related status write, not handled\n");
365 fw_send_response(card, request, RCODE_COMPLETE);
366 return;
367 }
368
369 /* Lookup the orb corresponding to this status write. */
370 spin_lock_irqsave(&card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200371 list_for_each_entry(orb, &lu->orb_list, link) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400372 if (STATUS_GET_ORB_HIGH(status) == 0 &&
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400373 STATUS_GET_ORB_LOW(status) == orb->request_bus) {
374 orb->rcode = RCODE_COMPLETE;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500375 list_del(&orb->link);
376 break;
377 }
378 }
379 spin_unlock_irqrestore(&card->lock, flags);
380
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200381 if (&orb->link != &lu->orb_list)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500382 orb->callback(orb, &status);
383 else
384 fw_error("status write for unknown orb\n");
385
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400386 kref_put(&orb->kref, free_orb);
387
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500388 fw_send_response(card, request, RCODE_COMPLETE);
389}
390
391static void
392complete_transaction(struct fw_card *card, int rcode,
393 void *payload, size_t length, void *data)
394{
395 struct sbp2_orb *orb = data;
396 unsigned long flags;
397
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400398 /*
399 * This is a little tricky. We can get the status write for
400 * the orb before we get this callback. The status write
401 * handler above will assume the orb pointer transaction was
402 * successful and set the rcode to RCODE_COMPLETE for the orb.
403 * So this callback only sets the rcode if it hasn't already
404 * been set and only does the cleanup if the transaction
405 * failed and we didn't already get a status write.
406 */
407 spin_lock_irqsave(&card->lock, flags);
408
409 if (orb->rcode == -1)
410 orb->rcode = rcode;
411 if (orb->rcode != RCODE_COMPLETE) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500412 list_del(&orb->link);
Stefan Richter1b34e972007-08-25 10:40:42 +0200413 spin_unlock_irqrestore(&card->lock, flags);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500414 orb->callback(orb, NULL);
Stefan Richter1b34e972007-08-25 10:40:42 +0200415 } else {
416 spin_unlock_irqrestore(&card->lock, flags);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500417 }
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400418
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400419 kref_put(&orb->kref, free_orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500420}
421
422static void
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200423sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500424 int node_id, int generation, u64 offset)
425{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200426 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500427 unsigned long flags;
428
429 orb->pointer.high = 0;
430 orb->pointer.low = orb->request_bus;
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400431 fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500432
433 spin_lock_irqsave(&device->card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200434 list_add_tail(&orb->link, &lu->orb_list);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500435 spin_unlock_irqrestore(&device->card->lock, flags);
436
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400437 /* Take a ref for the orb list and for the transaction callback. */
438 kref_get(&orb->kref);
439 kref_get(&orb->kref);
440
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500441 fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST,
Stefan Richterf1397492007-06-10 21:31:36 +0200442 node_id, generation, device->max_speed, offset,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400443 &orb->pointer, sizeof(orb->pointer),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500444 complete_transaction, orb);
445}
446
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200447static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500448{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200449 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500450 struct sbp2_orb *orb, *next;
451 struct list_head list;
452 unsigned long flags;
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500453 int retval = -ENOENT;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500454
455 INIT_LIST_HEAD(&list);
456 spin_lock_irqsave(&device->card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200457 list_splice_init(&lu->orb_list, &list);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500458 spin_unlock_irqrestore(&device->card->lock, flags);
459
460 list_for_each_entry_safe(orb, next, &list, link) {
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500461 retval = 0;
Kristian Høgsberg730c32f2007-02-06 14:49:32 -0500462 if (fw_cancel_transaction(device->card, &orb->t) == 0)
463 continue;
464
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500465 orb->rcode = RCODE_CANCELLED;
466 orb->callback(orb, NULL);
467 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500468
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500469 return retval;
Kristian Høgsberg1d3d52c2007-02-06 14:49:33 -0500470}
471
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500472static void
473complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
474{
475 struct sbp2_management_orb *orb =
Jay Fenlason6f061482007-06-27 16:04:33 -0400476 container_of(base_orb, struct sbp2_management_orb, base);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500477
478 if (status)
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400479 memcpy(&orb->status, status, sizeof(*status));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500480 complete(&orb->done);
481}
482
483static int
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200484sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id,
485 int generation, int function, int lun_or_login_id,
486 void *response)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500487{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200488 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500489 struct sbp2_management_orb *orb;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500490 int retval = -ENOMEM;
491
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400492 orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500493 if (orb == NULL)
494 return -ENOMEM;
495
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400496 kref_init(&orb->base.kref);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500497 orb->response_bus =
498 dma_map_single(device->card->device, &orb->response,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400499 sizeof(orb->response), DMA_FROM_DEVICE);
Kristian Høgsberg82eff9d2007-02-06 14:49:40 -0500500 if (dma_mapping_error(orb->response_bus))
Stefan Richter7aa48482007-07-02 21:04:44 +0200501 goto fail_mapping_response;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500502
503 orb->request.response.high = 0;
504 orb->request.response.low = orb->response_bus;
505
506 orb->request.misc =
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400507 MANAGEMENT_ORB_NOTIFY |
508 MANAGEMENT_ORB_FUNCTION(function) |
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200509 MANAGEMENT_ORB_LUN(lun_or_login_id);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500510 orb->request.length =
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400511 MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500512
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200513 orb->request.status_fifo.high = lu->address_handler.offset >> 32;
514 orb->request.status_fifo.low = lu->address_handler.offset;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500515
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500516 if (function == SBP2_LOGIN_REQUEST) {
517 orb->request.misc |=
Stefan Richter5cd54c92007-06-17 23:55:41 +0200518 MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login) |
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400519 MANAGEMENT_ORB_RECONNECT(0);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500520 }
521
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400522 fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500523
524 init_completion(&orb->done);
525 orb->base.callback = complete_management_orb;
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500526
Stefan Richter7aa48482007-07-02 21:04:44 +0200527 orb->base.request_bus =
528 dma_map_single(device->card->device, &orb->request,
529 sizeof(orb->request), DMA_TO_DEVICE);
530 if (dma_mapping_error(orb->base.request_bus))
531 goto fail_mapping_request;
532
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200533 sbp2_send_orb(&orb->base, lu, node_id, generation,
534 lu->tgt->management_agent_address);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500535
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500536 wait_for_completion_timeout(&orb->done,
537 msecs_to_jiffies(SBP2_ORB_TIMEOUT));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500538
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500539 retval = -EIO;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200540 if (sbp2_cancel_orbs(lu) == 0) {
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500541 fw_error("orb reply timed out, rcode=0x%02x\n",
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500542 orb->base.rcode);
543 goto out;
544 }
545
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500546 if (orb->base.rcode != RCODE_COMPLETE) {
547 fw_error("management write failed, rcode 0x%02x\n",
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500548 orb->base.rcode);
549 goto out;
550 }
551
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400552 if (STATUS_GET_RESPONSE(orb->status) != 0 ||
553 STATUS_GET_SBP_STATUS(orb->status) != 0) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500554 fw_error("error status: %d:%d\n",
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400555 STATUS_GET_RESPONSE(orb->status),
556 STATUS_GET_SBP_STATUS(orb->status));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500557 goto out;
558 }
559
560 retval = 0;
561 out:
562 dma_unmap_single(device->card->device, orb->base.request_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400563 sizeof(orb->request), DMA_TO_DEVICE);
Stefan Richter7aa48482007-07-02 21:04:44 +0200564 fail_mapping_request:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500565 dma_unmap_single(device->card->device, orb->response_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400566 sizeof(orb->response), DMA_FROM_DEVICE);
Stefan Richter7aa48482007-07-02 21:04:44 +0200567 fail_mapping_response:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500568 if (response)
569 fw_memcpy_from_be32(response,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400570 orb->response, sizeof(orb->response));
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400571 kref_put(&orb->base.kref, free_orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500572
573 return retval;
574}
575
576static void
577complete_agent_reset_write(struct fw_card *card, int rcode,
578 void *payload, size_t length, void *data)
579{
580 struct fw_transaction *t = data;
581
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500582 kfree(t);
583}
584
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200585static int sbp2_agent_reset(struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500586{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200587 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500588 struct fw_transaction *t;
589 static u32 zero;
590
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400591 t = kzalloc(sizeof(*t), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500592 if (t == NULL)
593 return -ENOMEM;
594
595 fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST,
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200596 lu->tgt->node_id, lu->generation, device->max_speed,
597 lu->command_block_agent_address + SBP2_AGENT_RESET,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400598 &zero, sizeof(zero), complete_agent_reset_write, t);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500599
600 return 0;
601}
602
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200603static void sbp2_release_target(struct kref *kref)
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400604{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200605 struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref);
606 struct sbp2_logical_unit *lu, *next;
607 struct Scsi_Host *shost =
608 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400609
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200610 list_for_each_entry_safe(lu, next, &tgt->lu_list, link) {
611 if (lu->sdev)
612 scsi_remove_device(lu->sdev);
613
614 sbp2_send_management_orb(lu, tgt->node_id, lu->generation,
615 SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
616 fw_core_remove_address_handler(&lu->address_handler);
617 list_del(&lu->link);
618 kfree(lu);
619 }
620 scsi_remove_host(shost);
621 fw_notify("released %s\n", tgt->unit->device.bus_id);
622
623 put_device(&tgt->unit->device);
624 scsi_host_put(shost);
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400625}
626
Stefan Richterdf8ec242007-08-12 12:51:18 +0200627static struct workqueue_struct *sbp2_wq;
628
Stefan Richter285838e2007-11-07 01:12:51 +0100629/*
630 * Always get the target's kref when scheduling work on one its units.
631 * Each workqueue job is responsible to call sbp2_target_put() upon return.
632 */
633static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay)
634{
635 if (queue_delayed_work(sbp2_wq, &lu->work, delay))
636 kref_get(&lu->tgt->kref);
637}
638
639static void sbp2_target_put(struct sbp2_target *tgt)
640{
641 kref_put(&tgt->kref, sbp2_release_target);
642}
643
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200644static void sbp2_reconnect(struct work_struct *work);
645
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500646static void sbp2_login(struct work_struct *work)
647{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200648 struct sbp2_logical_unit *lu =
649 container_of(work, struct sbp2_logical_unit, work.work);
650 struct Scsi_Host *shost =
651 container_of((void *)lu->tgt, struct Scsi_Host, hostdata[0]);
652 struct scsi_device *sdev;
653 struct scsi_lun eight_bytes_lun;
654 struct fw_unit *unit = lu->tgt->unit;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500655 struct fw_device *device = fw_device(unit->device.parent);
656 struct sbp2_login_response response;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200657 int generation, node_id, local_node_id;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500658
659 generation = device->card->generation;
660 node_id = device->node->node_id;
661 local_node_id = device->card->local_node->node_id;
662
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200663 if (sbp2_send_management_orb(lu, node_id, generation,
664 SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) {
Stefan Richter285838e2007-11-07 01:12:51 +0100665 if (lu->retries++ < 5)
666 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
667 else
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200668 fw_error("failed to login to %s LUN %04x\n",
669 unit->device.bus_id, lu->lun);
Stefan Richter285838e2007-11-07 01:12:51 +0100670 goto out;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500671 }
672
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200673 lu->generation = generation;
674 lu->tgt->node_id = node_id;
675 lu->tgt->address_high = local_node_id << 16;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500676
677 /* Get command block agent offset and login id. */
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200678 lu->command_block_agent_address =
Kristian Høgsberg5c5539d2007-03-07 12:12:45 -0500679 ((u64) (response.command_block_agent.high & 0xffff) << 32) |
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500680 response.command_block_agent.low;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200681 lu->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500682
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200683 fw_notify("logged in to %s LUN %04x (%d retries)\n",
684 unit->device.bus_id, lu->lun, lu->retries);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500685
686#if 0
687 /* FIXME: The linux1394 sbp2 does this last step. */
688 sbp2_set_busy_timeout(scsi_id);
689#endif
690
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200691 PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect);
692 sbp2_agent_reset(lu);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500693
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200694 memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun));
695 eight_bytes_lun.scsi_lun[0] = (lu->lun >> 8) & 0xff;
696 eight_bytes_lun.scsi_lun[1] = lu->lun & 0xff;
697
698 sdev = __scsi_add_device(shost, 0, 0,
699 scsilun_to_int(&eight_bytes_lun), lu);
700 if (IS_ERR(sdev)) {
701 sbp2_send_management_orb(lu, node_id, generation,
702 SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400703 /*
704 * Set this back to sbp2_login so we fall back and
705 * retry login on bus reset.
706 */
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200707 PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
708 } else {
709 lu->sdev = sdev;
710 scsi_device_put(sdev);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500711 }
Stefan Richter285838e2007-11-07 01:12:51 +0100712 out:
713 sbp2_target_put(lu->tgt);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500714}
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500715
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200716static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry)
717{
718 struct sbp2_logical_unit *lu;
719
720 lu = kmalloc(sizeof(*lu), GFP_KERNEL);
721 if (!lu)
722 return -ENOMEM;
723
724 lu->address_handler.length = 0x100;
725 lu->address_handler.address_callback = sbp2_status_write;
726 lu->address_handler.callback_data = lu;
727
728 if (fw_core_add_address_handler(&lu->address_handler,
729 &fw_high_memory_region) < 0) {
730 kfree(lu);
731 return -ENOMEM;
732 }
733
734 lu->tgt = tgt;
735 lu->sdev = NULL;
736 lu->lun = lun_entry & 0xffff;
737 lu->retries = 0;
738 INIT_LIST_HEAD(&lu->orb_list);
739 INIT_DELAYED_WORK(&lu->work, sbp2_login);
740
741 list_add_tail(&lu->link, &tgt->lu_list);
742 return 0;
743}
744
745static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory)
746{
747 struct fw_csr_iterator ci;
748 int key, value;
749
750 fw_csr_iterator_init(&ci, directory);
751 while (fw_csr_iterator_next(&ci, &key, &value))
752 if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER &&
753 sbp2_add_logical_unit(tgt, value) < 0)
754 return -ENOMEM;
755 return 0;
756}
757
758static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory,
759 u32 *model, u32 *firmware_revision)
760{
761 struct fw_csr_iterator ci;
762 int key, value;
763
764 fw_csr_iterator_init(&ci, directory);
765 while (fw_csr_iterator_next(&ci, &key, &value)) {
766 switch (key) {
767
768 case CSR_DEPENDENT_INFO | CSR_OFFSET:
769 tgt->management_agent_address =
770 CSR_REGISTER_BASE + 4 * value;
771 break;
772
773 case CSR_DIRECTORY_ID:
774 tgt->directory_id = value;
775 break;
776
777 case CSR_MODEL:
778 *model = value;
779 break;
780
781 case SBP2_CSR_FIRMWARE_REVISION:
782 *firmware_revision = value;
783 break;
784
785 case SBP2_CSR_LOGICAL_UNIT_NUMBER:
786 if (sbp2_add_logical_unit(tgt, value) < 0)
787 return -ENOMEM;
788 break;
789
790 case SBP2_CSR_LOGICAL_UNIT_DIRECTORY:
791 if (sbp2_scan_logical_unit_dir(tgt, ci.p + value) < 0)
792 return -ENOMEM;
793 break;
794 }
795 }
796 return 0;
797}
798
799static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model,
800 u32 firmware_revision)
801{
802 int i;
Stefan Richter2df222b2007-08-13 17:48:25 +0200803 unsigned w = sbp2_param_workarounds;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200804
Stefan Richter2df222b2007-08-13 17:48:25 +0200805 if (w)
806 fw_notify("Please notify linux1394-devel@lists.sourceforge.net "
807 "if you need the workarounds parameter for %s\n",
808 tgt->unit->device.bus_id);
809
810 if (w & SBP2_WORKAROUND_OVERRIDE)
811 goto out;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200812
813 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
814
815 if (sbp2_workarounds_table[i].firmware_revision !=
816 (firmware_revision & 0xffffff00))
817 continue;
818
819 if (sbp2_workarounds_table[i].model != model &&
820 sbp2_workarounds_table[i].model != ~0)
821 continue;
822
Stefan Richter2df222b2007-08-13 17:48:25 +0200823 w |= sbp2_workarounds_table[i].workarounds;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200824 break;
825 }
Stefan Richter2df222b2007-08-13 17:48:25 +0200826 out:
827 if (w)
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200828 fw_notify("Workarounds for %s: 0x%x "
829 "(firmware_revision 0x%06x, model_id 0x%06x)\n",
830 tgt->unit->device.bus_id,
Stefan Richter2df222b2007-08-13 17:48:25 +0200831 w, firmware_revision, model);
832 tgt->workarounds = w;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200833}
834
835static struct scsi_host_template scsi_driver_template;
836
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500837static int sbp2_probe(struct device *dev)
838{
839 struct fw_unit *unit = fw_unit(dev);
840 struct fw_device *device = fw_device(unit->device.parent);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200841 struct sbp2_target *tgt;
842 struct sbp2_logical_unit *lu;
843 struct Scsi_Host *shost;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500844 u32 model, firmware_revision;
845
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200846 shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt));
847 if (shost == NULL)
848 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500849
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200850 tgt = (struct sbp2_target *)shost->hostdata;
851 unit->device.driver_data = tgt;
852 tgt->unit = unit;
853 kref_init(&tgt->kref);
854 INIT_LIST_HEAD(&tgt->lu_list);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500855
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200856 if (fw_device_enable_phys_dma(device) < 0)
857 goto fail_shost_put;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500858
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200859 if (scsi_add_host(shost, &unit->device) < 0)
860 goto fail_shost_put;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500861
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200862 /* Initialize to values that won't match anything in our table. */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500863 firmware_revision = 0xff000000;
864 model = 0xff000000;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500865
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200866 /* implicit directory ID */
867 tgt->directory_id = ((unit->directory - device->config_rom) * 4
868 + CSR_CONFIG_ROM) & 0xffffff;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500869
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200870 if (sbp2_scan_unit_dir(tgt, unit->directory, &model,
871 &firmware_revision) < 0)
872 goto fail_tgt_put;
873
874 sbp2_init_workarounds(tgt, model, firmware_revision);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500875
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400876 get_device(&unit->device);
877
Stefan Richter285838e2007-11-07 01:12:51 +0100878 /* Do the login in a workqueue so we can easily reschedule retries. */
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200879 list_for_each_entry(lu, &tgt->lu_list, link)
Stefan Richter285838e2007-11-07 01:12:51 +0100880 sbp2_queue_work(lu, 0);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500881 return 0;
Kristian Høgsbergad852742007-05-09 19:23:07 -0400882
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200883 fail_tgt_put:
Stefan Richter285838e2007-11-07 01:12:51 +0100884 sbp2_target_put(tgt);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200885 return -ENOMEM;
886
887 fail_shost_put:
888 scsi_host_put(shost);
889 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500890}
891
892static int sbp2_remove(struct device *dev)
893{
894 struct fw_unit *unit = fw_unit(dev);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200895 struct sbp2_target *tgt = unit->device.driver_data;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500896
Stefan Richter285838e2007-11-07 01:12:51 +0100897 sbp2_target_put(tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500898 return 0;
899}
900
901static void sbp2_reconnect(struct work_struct *work)
902{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200903 struct sbp2_logical_unit *lu =
904 container_of(work, struct sbp2_logical_unit, work.work);
905 struct fw_unit *unit = lu->tgt->unit;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500906 struct fw_device *device = fw_device(unit->device.parent);
907 int generation, node_id, local_node_id;
908
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500909 generation = device->card->generation;
910 node_id = device->node->node_id;
911 local_node_id = device->card->local_node->node_id;
912
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200913 if (sbp2_send_management_orb(lu, node_id, generation,
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500914 SBP2_RECONNECT_REQUEST,
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200915 lu->login_id, NULL) < 0) {
916 if (lu->retries++ >= 5) {
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500917 fw_error("failed to reconnect to %s\n",
918 unit->device.bus_id);
919 /* Fall back and try to log in again. */
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200920 lu->retries = 0;
921 PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500922 }
Stefan Richter285838e2007-11-07 01:12:51 +0100923 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
924 goto out;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500925 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500926
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200927 lu->generation = generation;
928 lu->tgt->node_id = node_id;
929 lu->tgt->address_high = local_node_id << 16;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500930
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200931 fw_notify("reconnected to %s LUN %04x (%d retries)\n",
932 unit->device.bus_id, lu->lun, lu->retries);
933
934 sbp2_agent_reset(lu);
935 sbp2_cancel_orbs(lu);
Stefan Richter285838e2007-11-07 01:12:51 +0100936 out:
937 sbp2_target_put(lu->tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500938}
939
940static void sbp2_update(struct fw_unit *unit)
941{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200942 struct sbp2_target *tgt = unit->device.driver_data;
943 struct sbp2_logical_unit *lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500944
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200945 fw_device_enable_phys_dma(fw_device(unit->device.parent));
946
947 /*
948 * Fw-core serializes sbp2_update() against sbp2_remove().
949 * Iteration over tgt->lu_list is therefore safe here.
950 */
951 list_for_each_entry(lu, &tgt->lu_list, link) {
952 lu->retries = 0;
Stefan Richter285838e2007-11-07 01:12:51 +0100953 sbp2_queue_work(lu, 0);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200954 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500955}
956
957#define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e
958#define SBP2_SW_VERSION_ENTRY 0x00010483
959
Stefan Richter21ebcd12007-01-14 15:29:07 +0100960static const struct fw_device_id sbp2_id_table[] = {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500961 {
962 .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION,
963 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY,
Stefan Richter5af4e5e2007-01-21 20:45:32 +0100964 .version = SBP2_SW_VERSION_ENTRY,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500965 },
966 { }
967};
968
969static struct fw_driver sbp2_driver = {
970 .driver = {
971 .owner = THIS_MODULE,
972 .name = sbp2_driver_name,
973 .bus = &fw_bus_type,
974 .probe = sbp2_probe,
975 .remove = sbp2_remove,
976 },
977 .update = sbp2_update,
978 .id_table = sbp2_id_table,
979};
980
Kristian Høgsbergfbb54232007-04-10 18:11:18 -0400981static unsigned int
982sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500983{
Kristian Høgsbergfbb54232007-04-10 18:11:18 -0400984 int sam_status;
985
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500986 sense_data[0] = 0x70;
987 sense_data[1] = 0x0;
988 sense_data[2] = sbp2_status[1];
989 sense_data[3] = sbp2_status[4];
990 sense_data[4] = sbp2_status[5];
991 sense_data[5] = sbp2_status[6];
992 sense_data[6] = sbp2_status[7];
993 sense_data[7] = 10;
994 sense_data[8] = sbp2_status[8];
995 sense_data[9] = sbp2_status[9];
996 sense_data[10] = sbp2_status[10];
997 sense_data[11] = sbp2_status[11];
998 sense_data[12] = sbp2_status[2];
999 sense_data[13] = sbp2_status[3];
1000 sense_data[14] = sbp2_status[12];
1001 sense_data[15] = sbp2_status[13];
1002
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001003 sam_status = sbp2_status[0] & 0x3f;
1004
1005 switch (sam_status) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001006 case SAM_STAT_GOOD:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001007 case SAM_STAT_CHECK_CONDITION:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001008 case SAM_STAT_CONDITION_MET:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001009 case SAM_STAT_BUSY:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001010 case SAM_STAT_RESERVATION_CONFLICT:
1011 case SAM_STAT_COMMAND_TERMINATED:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001012 return DID_OK << 16 | sam_status;
1013
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001014 default:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001015 return DID_ERROR << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001016 }
1017}
1018
1019static void
1020complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
1021{
Jay Fenlason6f061482007-06-27 16:04:33 -04001022 struct sbp2_command_orb *orb =
1023 container_of(base_orb, struct sbp2_command_orb, base);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001024 struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001025 int result;
1026
1027 if (status != NULL) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001028 if (STATUS_GET_DEAD(*status))
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001029 sbp2_agent_reset(orb->lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001030
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001031 switch (STATUS_GET_RESPONSE(*status)) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001032 case SBP2_STATUS_REQUEST_COMPLETE:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001033 result = DID_OK << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001034 break;
1035 case SBP2_STATUS_TRANSPORT_FAILURE:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001036 result = DID_BUS_BUSY << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001037 break;
1038 case SBP2_STATUS_ILLEGAL_REQUEST:
1039 case SBP2_STATUS_VENDOR_DEPENDENT:
1040 default:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001041 result = DID_ERROR << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001042 break;
1043 }
1044
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001045 if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1)
1046 result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001047 orb->cmd->sense_buffer);
1048 } else {
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001049 /*
1050 * If the orb completes with status == NULL, something
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001051 * went wrong, typically a bus reset happened mid-orb
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001052 * or when sending the write (less likely).
1053 */
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001054 result = DID_BUS_BUSY << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001055 }
1056
1057 dma_unmap_single(device->card->device, orb->base.request_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001058 sizeof(orb->request), DMA_TO_DEVICE);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001059
Stefan Richter412edf62007-07-16 21:05:41 +02001060 if (scsi_sg_count(orb->cmd) > 0)
1061 dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd),
1062 scsi_sg_count(orb->cmd),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001063 orb->cmd->sc_data_direction);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001064
1065 if (orb->page_table_bus != 0)
1066 dma_unmap_single(device->card->device, orb->page_table_bus,
Stefan Richterb4be0162007-07-02 22:07:34 +02001067 sizeof(orb->page_table), DMA_TO_DEVICE);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001068
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001069 orb->cmd->result = result;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001070 orb->done(orb->cmd);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001071}
1072
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001073static int
1074sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device,
1075 struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001076{
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001077 struct scatterlist *sg;
1078 int sg_len, l, i, j, count;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001079 dma_addr_t sg_addr;
1080
Stefan Richter412edf62007-07-16 21:05:41 +02001081 sg = scsi_sglist(orb->cmd);
1082 count = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001083 orb->cmd->sc_data_direction);
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001084 if (count == 0)
1085 goto fail;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001086
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001087 /*
1088 * Handle the special case where there is only one element in
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001089 * the scatter list by converting it to an immediate block
1090 * request. This is also a workaround for broken devices such
1091 * as the second generation iPod which doesn't support page
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001092 * tables.
1093 */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001094 if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) {
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001095 orb->request.data_descriptor.high = lu->tgt->address_high;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001096 orb->request.data_descriptor.low = sg_dma_address(sg);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001097 orb->request.misc |= COMMAND_ORB_DATA_SIZE(sg_dma_len(sg));
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001098 return 0;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001099 }
1100
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001101 /*
1102 * Convert the scatterlist to an sbp2 page table. If any
Kristian Høgsberg, Stefan Richter36abb3b2007-05-09 19:23:10 -04001103 * scatterlist entries are too big for sbp2, we split them as we
1104 * go. Even if we ask the block I/O layer to not give us sg
1105 * elements larger than 65535 bytes, some IOMMUs may merge sg elements
1106 * during DMA mapping, and Linux currently doesn't prevent this.
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001107 */
Stefan Richterb7811da2008-01-15 21:10:50 +01001108 for (i = 0, j = 0; i < count; i++, sg = sg_next(sg)) {
1109 sg_len = sg_dma_len(sg);
1110 sg_addr = sg_dma_address(sg);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001111 while (sg_len) {
Stefan Richter332ef332007-07-01 13:56:03 +02001112 /* FIXME: This won't get us out of the pinch. */
1113 if (unlikely(j >= ARRAY_SIZE(orb->page_table))) {
1114 fw_error("page table overflow\n");
1115 goto fail_page_table;
1116 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001117 l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH);
1118 orb->page_table[j].low = sg_addr;
1119 orb->page_table[j].high = (l << 16);
1120 sg_addr += l;
1121 sg_len -= l;
1122 j++;
1123 }
1124 }
1125
Stefan Richterb4be0162007-07-02 22:07:34 +02001126 fw_memcpy_to_be32(orb->page_table, orb->page_table,
1127 sizeof(orb->page_table[0]) * j);
1128 orb->page_table_bus =
1129 dma_map_single(device->card->device, orb->page_table,
1130 sizeof(orb->page_table), DMA_TO_DEVICE);
1131 if (dma_mapping_error(orb->page_table_bus))
1132 goto fail_page_table;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001133
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001134 /*
1135 * The data_descriptor pointer is the one case where we need
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001136 * to fill in the node ID part of the address. All other
1137 * pointers assume that the data referenced reside on the
1138 * initiator (i.e. us), but data_descriptor can refer to data
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001139 * on other nodes so we need to put our ID in descriptor.high.
1140 */
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001141 orb->request.data_descriptor.high = lu->tgt->address_high;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001142 orb->request.data_descriptor.low = orb->page_table_bus;
1143 orb->request.misc |=
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001144 COMMAND_ORB_PAGE_TABLE_PRESENT |
1145 COMMAND_ORB_DATA_SIZE(j);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001146
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001147 return 0;
1148
1149 fail_page_table:
Stefan Richter412edf62007-07-16 21:05:41 +02001150 dma_unmap_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001151 orb->cmd->sc_data_direction);
1152 fail:
1153 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001154}
1155
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001156/* SCSI stack integration */
1157
1158static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
1159{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001160 struct sbp2_logical_unit *lu = cmd->device->hostdata;
1161 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001162 struct sbp2_command_orb *orb;
Stefan Richter25659f72007-07-21 22:43:05 +02001163 unsigned max_payload;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001164 int retval = SCSI_MLQUEUE_HOST_BUSY;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001165
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001166 /*
1167 * Bidirectional commands are not yet implemented, and unknown
1168 * transfer direction not handled.
1169 */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001170 if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {
Stefan Richter8a8cea22007-06-09 19:26:22 +02001171 fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n");
Kristian Høgsberge1b68c42007-05-09 19:23:09 -04001172 cmd->result = DID_ERROR << 16;
1173 done(cmd);
1174 return 0;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001175 }
1176
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001177 orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001178 if (orb == NULL) {
1179 fw_notify("failed to alloc orb\n");
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001180 return SCSI_MLQUEUE_HOST_BUSY;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001181 }
1182
Kristian Høgsberg12f26aa2007-04-10 18:11:20 -04001183 /* Initialize rcode to something not RCODE_COMPLETE. */
1184 orb->base.rcode = -1;
Kristian Høgsberge57d2012007-08-24 18:59:58 -04001185 kref_init(&orb->base.kref);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001186
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001187 orb->lu = lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001188 orb->done = done;
1189 orb->cmd = cmd;
1190
1191 orb->request.next.high = SBP2_ORB_NULL;
1192 orb->request.next.low = 0x0;
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001193 /*
1194 * At speed 100 we can do 512 bytes per packet, at speed 200,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001195 * 1024 bytes per packet etc. The SBP-2 max_payload field
1196 * specifies the max payload size as 2 ^ (max_payload + 2), so
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001197 * if we set this to max_speed + 7, we get the right value.
1198 */
Stefan Richter25659f72007-07-21 22:43:05 +02001199 max_payload = min(device->max_speed + 7,
1200 device->card->max_receive - 1);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001201 orb->request.misc =
Stefan Richter25659f72007-07-21 22:43:05 +02001202 COMMAND_ORB_MAX_PAYLOAD(max_payload) |
Stefan Richterf1397492007-06-10 21:31:36 +02001203 COMMAND_ORB_SPEED(device->max_speed) |
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001204 COMMAND_ORB_NOTIFY;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001205
1206 if (cmd->sc_data_direction == DMA_FROM_DEVICE)
1207 orb->request.misc |=
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001208 COMMAND_ORB_DIRECTION(SBP2_DIRECTION_FROM_MEDIA);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001209 else if (cmd->sc_data_direction == DMA_TO_DEVICE)
1210 orb->request.misc |=
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001211 COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001212
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001213 if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0)
1214 goto out;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001215
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001216 fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001217
1218 memset(orb->request.command_block,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001219 0, sizeof(orb->request.command_block));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001220 memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
1221
1222 orb->base.callback = complete_command_orb;
Stefan Richter85263922007-07-02 21:04:08 +02001223 orb->base.request_bus =
1224 dma_map_single(device->card->device, &orb->request,
1225 sizeof(orb->request), DMA_TO_DEVICE);
1226 if (dma_mapping_error(orb->base.request_bus))
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001227 goto out;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001228
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001229 sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, lu->generation,
1230 lu->command_block_agent_address + SBP2_ORB_POINTER);
1231 retval = 0;
1232 out:
Kristian Høgsberge57d2012007-08-24 18:59:58 -04001233 kref_put(&orb->base.kref, free_orb);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001234 return retval;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001235}
1236
Stefan Richtercfb01382007-01-23 21:20:08 +01001237static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
1238{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001239 struct sbp2_logical_unit *lu = sdev->hostdata;
Stefan Richtercfb01382007-01-23 21:20:08 +01001240
1241 sdev->allow_restart = 1;
1242
James Bottomley465ff312008-01-01 10:00:10 -06001243 /*
1244 * Update the dma alignment (minimum alignment requirements for
1245 * start and end of DMA transfers) to be a sector
1246 */
1247 blk_queue_update_dma_alignment(sdev->request_queue, 511);
1248
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001249 if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36)
Stefan Richtercfb01382007-01-23 21:20:08 +01001250 sdev->inquiry_len = 36;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001251
Stefan Richtercfb01382007-01-23 21:20:08 +01001252 return 0;
1253}
1254
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001255static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
1256{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001257 struct sbp2_logical_unit *lu = sdev->hostdata;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001258
Stefan Richtercfb01382007-01-23 21:20:08 +01001259 sdev->use_10_for_rw = 1;
1260
1261 if (sdev->type == TYPE_ROM)
1262 sdev->use_10_for_ms = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001263
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001264 if (sdev->type == TYPE_DISK &&
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001265 lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001266 sdev->skip_ms_page_8 = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001267
1268 if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001269 sdev->fix_capacity = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001270
1271 if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
Stefan Richtercf47c7a2007-06-17 23:52:08 +02001272 blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001273
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001274 return 0;
1275}
1276
1277/*
1278 * Called by scsi stack when something has really gone wrong. Usually
1279 * called when a command has timed-out for some reason.
1280 */
1281static int sbp2_scsi_abort(struct scsi_cmnd *cmd)
1282{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001283 struct sbp2_logical_unit *lu = cmd->device->hostdata;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001284
1285 fw_notify("sbp2_scsi_abort\n");
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001286 sbp2_agent_reset(lu);
1287 sbp2_cancel_orbs(lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001288
1289 return SUCCESS;
1290}
1291
Stefan Richter14e21982007-05-27 13:18:27 +02001292/*
1293 * Format of /sys/bus/scsi/devices/.../ieee1394_id:
1294 * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal)
1295 *
1296 * This is the concatenation of target port identifier and logical unit
1297 * identifier as per SAM-2...SAM-4 annex A.
1298 */
1299static ssize_t
1300sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr,
1301 char *buf)
1302{
1303 struct scsi_device *sdev = to_scsi_device(dev);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001304 struct sbp2_logical_unit *lu;
Stefan Richter14e21982007-05-27 13:18:27 +02001305 struct fw_device *device;
Stefan Richter14e21982007-05-27 13:18:27 +02001306
1307 if (!sdev)
1308 return 0;
Stefan Richter14e21982007-05-27 13:18:27 +02001309
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001310 lu = sdev->hostdata;
1311 device = fw_device(lu->tgt->unit->device.parent);
Stefan Richter14e21982007-05-27 13:18:27 +02001312
1313 return sprintf(buf, "%08x%08x:%06x:%04x\n",
1314 device->config_rom[3], device->config_rom[4],
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001315 lu->tgt->directory_id, lu->lun);
Stefan Richter14e21982007-05-27 13:18:27 +02001316}
1317
1318static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
1319
1320static struct device_attribute *sbp2_scsi_sysfs_attrs[] = {
1321 &dev_attr_ieee1394_id,
1322 NULL
1323};
1324
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001325static struct scsi_host_template scsi_driver_template = {
1326 .module = THIS_MODULE,
1327 .name = "SBP-2 IEEE-1394",
Kristian Høgsbergb02b6bc2007-05-09 19:23:12 -04001328 .proc_name = sbp2_driver_name,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001329 .queuecommand = sbp2_scsi_queuecommand,
Stefan Richtercfb01382007-01-23 21:20:08 +01001330 .slave_alloc = sbp2_scsi_slave_alloc,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001331 .slave_configure = sbp2_scsi_slave_configure,
1332 .eh_abort_handler = sbp2_scsi_abort,
1333 .this_id = -1,
1334 .sg_tablesize = SG_ALL,
1335 .use_clustering = ENABLE_CLUSTERING,
Stefan Richter02af8e72007-01-21 20:50:11 +01001336 .cmd_per_lun = 1,
1337 .can_queue = 1,
Stefan Richter14e21982007-05-27 13:18:27 +02001338 .sdev_attrs = sbp2_scsi_sysfs_attrs,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001339};
1340
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001341MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
1342MODULE_DESCRIPTION("SCSI over IEEE1394");
1343MODULE_LICENSE("GPL");
1344MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
1345
Olaf Hering1e4c7b02007-05-05 23:17:13 +02001346/* Provide a module alias so root-on-sbp2 initrds don't break. */
1347#ifndef CONFIG_IEEE1394_SBP2_MODULE
1348MODULE_ALIAS("sbp2");
1349#endif
1350
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001351static int __init sbp2_init(void)
1352{
Stefan Richterdf8ec242007-08-12 12:51:18 +02001353 sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME);
1354 if (!sbp2_wq)
1355 return -ENOMEM;
1356
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001357 return driver_register(&sbp2_driver.driver);
1358}
1359
1360static void __exit sbp2_cleanup(void)
1361{
1362 driver_unregister(&sbp2_driver.driver);
Stefan Richterdf8ec242007-08-12 12:51:18 +02001363 destroy_workqueue(sbp2_wq);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001364}
1365
1366module_init(sbp2_init);
1367module_exit(sbp2_cleanup);