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Commit | Line | Data |
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c781c06d KH |
1 | /* |
2 | * SBP2 driver (SCSI over IEEE1394) | |
9ba136d0 | 3 | * |
27a15e50 | 4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
9ba136d0 KH |
5 | * |
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 | ||
c781c06d KH |
21 | /* |
22 | * The basic structure of this driver is based on the old storage driver, | |
27a15e50 KH |
23 | * 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 | ||
9ba136d0 KH |
31 | #include <linux/kernel.h> |
32 | #include <linux/module.h> | |
5cd54c94 | 33 | #include <linux/moduleparam.h> |
fe69ca3a | 34 | #include <linux/mod_devicetable.h> |
9ba136d0 | 35 | #include <linux/device.h> |
0b5b2903 | 36 | #include <linux/scatterlist.h> |
9ba136d0 | 37 | #include <linux/dma-mapping.h> |
cf47c7a2 | 38 | #include <linux/blkdev.h> |
e7cdf237 | 39 | #include <linux/string.h> |
1d3d52c5 | 40 | #include <linux/timer.h> |
9ba136d0 KH |
41 | |
42 | #include <scsi/scsi.h> | |
43 | #include <scsi/scsi_cmnd.h> | |
9ba136d0 KH |
44 | #include <scsi/scsi_device.h> |
45 | #include <scsi/scsi_host.h> | |
46 | ||
47 | #include "fw-transaction.h" | |
48 | #include "fw-topology.h" | |
49 | #include "fw-device.h" | |
50 | ||
5cd54c94 SR |
51 | /* |
52 | * So far only bridges from Oxford Semiconductor are known to support | |
53 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
54 | * are possible on OXFW911 and newer Oxsemi bridges. | |
55 | * | |
56 | * Concurrent logins are useful together with cluster filesystems. | |
57 | */ | |
58 | static int sbp2_param_exclusive_login = 1; | |
59 | module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); | |
60 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " | |
61 | "(default = Y, use N for concurrent initiators)"); | |
62 | ||
9ba136d0 | 63 | /* I don't know why the SCSI stack doesn't define something like this... */ |
a98e2719 | 64 | typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); |
9ba136d0 KH |
65 | |
66 | static const char sbp2_driver_name[] = "sbp2"; | |
67 | ||
5a3c2be6 SR |
68 | /* |
69 | * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry | |
70 | * and one struct scsi_device per sbp2_logical_unit. | |
71 | */ | |
72 | struct sbp2_logical_unit { | |
73 | struct sbp2_target *tgt; | |
74 | struct list_head link; | |
75 | struct scsi_device *sdev; | |
9ba136d0 KH |
76 | struct fw_address_handler address_handler; |
77 | struct list_head orb_list; | |
5a3c2be6 | 78 | |
9ba136d0 | 79 | u64 command_block_agent_address; |
5a3c2be6 | 80 | u16 lun; |
9ba136d0 KH |
81 | int login_id; |
82 | ||
c781c06d | 83 | /* |
5a3c2be6 SR |
84 | * The generation is updated once we've logged in or reconnected |
85 | * to the logical unit. Thus, I/O to the device will automatically | |
86 | * fail and get retried if it happens in a window where the device | |
87 | * is not ready, e.g. after a bus reset but before we reconnect. | |
c781c06d | 88 | */ |
9ba136d0 | 89 | int generation; |
7f37c426 KH |
90 | int retries; |
91 | struct delayed_work work; | |
9ba136d0 KH |
92 | }; |
93 | ||
5a3c2be6 SR |
94 | /* |
95 | * We create one struct sbp2_target per IEEE 1212 Unit Directory | |
96 | * and one struct Scsi_Host per sbp2_target. | |
97 | */ | |
98 | struct sbp2_target { | |
99 | struct kref kref; | |
100 | struct fw_unit *unit; | |
101 | ||
102 | u64 management_agent_address; | |
103 | int directory_id; | |
104 | int node_id; | |
105 | int address_high; | |
106 | ||
107 | unsigned workarounds; | |
108 | struct list_head lu_list; | |
109 | }; | |
110 | ||
9ba136d0 KH |
111 | #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 |
112 | #define SBP2_MAX_SECTORS 255 /* Max sectors supported */ | |
1d3d52c5 | 113 | #define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */ |
9ba136d0 KH |
114 | |
115 | #define SBP2_ORB_NULL 0x80000000 | |
116 | ||
117 | #define SBP2_DIRECTION_TO_MEDIA 0x0 | |
118 | #define SBP2_DIRECTION_FROM_MEDIA 0x1 | |
119 | ||
120 | /* Unit directory keys */ | |
5a3c2be6 SR |
121 | #define SBP2_CSR_FIRMWARE_REVISION 0x3c |
122 | #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 | |
123 | #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 | |
9ba136d0 KH |
124 | |
125 | /* Flags for detected oddities and brokeness */ | |
126 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 | |
127 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 | |
128 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 | |
129 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 | |
130 | #define SBP2_WORKAROUND_OVERRIDE 0x100 | |
131 | ||
132 | /* Management orb opcodes */ | |
133 | #define SBP2_LOGIN_REQUEST 0x0 | |
134 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
135 | #define SBP2_RECONNECT_REQUEST 0x3 | |
136 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
137 | #define SBP2_LOGOUT_REQUEST 0x7 | |
138 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
139 | #define SBP2_ABORT_TASK_SET 0xc | |
140 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
141 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
142 | ||
143 | /* Offsets for command block agent registers */ | |
144 | #define SBP2_AGENT_STATE 0x00 | |
145 | #define SBP2_AGENT_RESET 0x04 | |
146 | #define SBP2_ORB_POINTER 0x08 | |
147 | #define SBP2_DOORBELL 0x10 | |
148 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
149 | ||
150 | /* Status write response codes */ | |
151 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
152 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
153 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
154 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
155 | ||
a77754a7 KH |
156 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
157 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) | |
158 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) | |
159 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) | |
160 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) | |
161 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) | |
162 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) | |
163 | #define STATUS_GET_DATA(v) ((v).data) | |
9ba136d0 KH |
164 | |
165 | struct sbp2_status { | |
166 | u32 status; | |
167 | u32 orb_low; | |
168 | u8 data[24]; | |
169 | }; | |
170 | ||
171 | struct sbp2_pointer { | |
172 | u32 high; | |
173 | u32 low; | |
174 | }; | |
175 | ||
176 | struct sbp2_orb { | |
177 | struct fw_transaction t; | |
e57d2011 | 178 | struct kref kref; |
9ba136d0 KH |
179 | dma_addr_t request_bus; |
180 | int rcode; | |
181 | struct sbp2_pointer pointer; | |
a98e2719 | 182 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
9ba136d0 KH |
183 | struct list_head link; |
184 | }; | |
185 | ||
a77754a7 KH |
186 | #define MANAGEMENT_ORB_LUN(v) ((v)) |
187 | #define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16) | |
188 | #define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20) | |
5cd54c94 | 189 | #define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0) |
a77754a7 KH |
190 | #define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29) |
191 | #define MANAGEMENT_ORB_NOTIFY ((1) << 31) | |
9ba136d0 | 192 | |
a77754a7 KH |
193 | #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) |
194 | #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) | |
9ba136d0 KH |
195 | |
196 | struct sbp2_management_orb { | |
197 | struct sbp2_orb base; | |
198 | struct { | |
199 | struct sbp2_pointer password; | |
200 | struct sbp2_pointer response; | |
201 | u32 misc; | |
202 | u32 length; | |
203 | struct sbp2_pointer status_fifo; | |
204 | } request; | |
205 | __be32 response[4]; | |
206 | dma_addr_t response_bus; | |
207 | struct completion done; | |
208 | struct sbp2_status status; | |
209 | }; | |
210 | ||
a77754a7 KH |
211 | #define LOGIN_RESPONSE_GET_LOGIN_ID(v) ((v).misc & 0xffff) |
212 | #define LOGIN_RESPONSE_GET_LENGTH(v) (((v).misc >> 16) & 0xffff) | |
9ba136d0 KH |
213 | |
214 | struct sbp2_login_response { | |
215 | u32 misc; | |
216 | struct sbp2_pointer command_block_agent; | |
217 | u32 reconnect_hold; | |
218 | }; | |
a77754a7 KH |
219 | #define COMMAND_ORB_DATA_SIZE(v) ((v)) |
220 | #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) | |
221 | #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) | |
222 | #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) | |
223 | #define COMMAND_ORB_SPEED(v) ((v) << 24) | |
224 | #define COMMAND_ORB_DIRECTION(v) ((v) << 27) | |
225 | #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) | |
226 | #define COMMAND_ORB_NOTIFY ((1) << 31) | |
9ba136d0 KH |
227 | |
228 | struct sbp2_command_orb { | |
229 | struct sbp2_orb base; | |
230 | struct { | |
231 | struct sbp2_pointer next; | |
232 | struct sbp2_pointer data_descriptor; | |
233 | u32 misc; | |
234 | u8 command_block[12]; | |
235 | } request; | |
236 | struct scsi_cmnd *cmd; | |
237 | scsi_done_fn_t done; | |
5a3c2be6 | 238 | struct sbp2_logical_unit *lu; |
9ba136d0 | 239 | |
9fb2dd12 | 240 | struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); |
9ba136d0 | 241 | dma_addr_t page_table_bus; |
9ba136d0 KH |
242 | }; |
243 | ||
244 | /* | |
245 | * List of devices with known bugs. | |
246 | * | |
247 | * The firmware_revision field, masked with 0xffff00, is the best | |
248 | * indicator for the type of bridge chip of a device. It yields a few | |
249 | * false positives but this did not break correctly behaving devices | |
250 | * so far. We use ~0 as a wildcard, since the 24 bit values we get | |
251 | * from the config rom can never match that. | |
252 | */ | |
253 | static const struct { | |
254 | u32 firmware_revision; | |
255 | u32 model; | |
256 | unsigned workarounds; | |
257 | } sbp2_workarounds_table[] = { | |
258 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
259 | .firmware_revision = 0x002800, | |
260 | .model = 0x001010, | |
261 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
262 | SBP2_WORKAROUND_MODE_SENSE_8, | |
263 | }, | |
264 | /* Initio bridges, actually only needed for some older ones */ { | |
265 | .firmware_revision = 0x000200, | |
266 | .model = ~0, | |
267 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
268 | }, | |
269 | /* Symbios bridge */ { | |
270 | .firmware_revision = 0xa0b800, | |
271 | .model = ~0, | |
272 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
273 | }, | |
c781c06d KH |
274 | |
275 | /* | |
276 | * There are iPods (2nd gen, 3rd gen) with model_id == 0, but | |
9ba136d0 KH |
277 | * these iPods do not feature the read_capacity bug according |
278 | * to one report. Read_capacity behaviour as well as model_id | |
c781c06d KH |
279 | * could change due to Apple-supplied firmware updates though. |
280 | */ | |
281 | ||
9ba136d0 KH |
282 | /* iPod 4th generation. */ { |
283 | .firmware_revision = 0x0a2700, | |
284 | .model = 0x000021, | |
285 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
286 | }, | |
287 | /* iPod mini */ { | |
288 | .firmware_revision = 0x0a2700, | |
289 | .model = 0x000023, | |
290 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
291 | }, | |
292 | /* iPod Photo */ { | |
293 | .firmware_revision = 0x0a2700, | |
294 | .model = 0x00007e, | |
295 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
296 | } | |
297 | }; | |
298 | ||
e57d2011 KH |
299 | static void |
300 | free_orb(struct kref *kref) | |
301 | { | |
302 | struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); | |
303 | ||
304 | kfree(orb); | |
305 | } | |
306 | ||
9ba136d0 KH |
307 | static void |
308 | sbp2_status_write(struct fw_card *card, struct fw_request *request, | |
309 | int tcode, int destination, int source, | |
310 | int generation, int speed, | |
311 | unsigned long long offset, | |
312 | void *payload, size_t length, void *callback_data) | |
313 | { | |
5a3c2be6 | 314 | struct sbp2_logical_unit *lu = callback_data; |
9ba136d0 KH |
315 | struct sbp2_orb *orb; |
316 | struct sbp2_status status; | |
317 | size_t header_size; | |
318 | unsigned long flags; | |
319 | ||
320 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
2d826cc5 | 321 | length == 0 || length > sizeof(status)) { |
9ba136d0 KH |
322 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
323 | return; | |
324 | } | |
325 | ||
326 | header_size = min(length, 2 * sizeof(u32)); | |
327 | fw_memcpy_from_be32(&status, payload, header_size); | |
328 | if (length > header_size) | |
329 | memcpy(status.data, payload + 8, length - header_size); | |
a77754a7 | 330 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
9ba136d0 KH |
331 | fw_notify("non-orb related status write, not handled\n"); |
332 | fw_send_response(card, request, RCODE_COMPLETE); | |
333 | return; | |
334 | } | |
335 | ||
336 | /* Lookup the orb corresponding to this status write. */ | |
337 | spin_lock_irqsave(&card->lock, flags); | |
5a3c2be6 | 338 | list_for_each_entry(orb, &lu->orb_list, link) { |
a77754a7 | 339 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
e57d2011 KH |
340 | STATUS_GET_ORB_LOW(status) == orb->request_bus) { |
341 | orb->rcode = RCODE_COMPLETE; | |
9ba136d0 KH |
342 | list_del(&orb->link); |
343 | break; | |
344 | } | |
345 | } | |
346 | spin_unlock_irqrestore(&card->lock, flags); | |
347 | ||
5a3c2be6 | 348 | if (&orb->link != &lu->orb_list) |
9ba136d0 KH |
349 | orb->callback(orb, &status); |
350 | else | |
351 | fw_error("status write for unknown orb\n"); | |
352 | ||
e57d2011 KH |
353 | kref_put(&orb->kref, free_orb); |
354 | ||
9ba136d0 KH |
355 | fw_send_response(card, request, RCODE_COMPLETE); |
356 | } | |
357 | ||
358 | static void | |
359 | complete_transaction(struct fw_card *card, int rcode, | |
360 | void *payload, size_t length, void *data) | |
361 | { | |
362 | struct sbp2_orb *orb = data; | |
363 | unsigned long flags; | |
364 | ||
e57d2011 KH |
365 | /* |
366 | * This is a little tricky. We can get the status write for | |
367 | * the orb before we get this callback. The status write | |
368 | * handler above will assume the orb pointer transaction was | |
369 | * successful and set the rcode to RCODE_COMPLETE for the orb. | |
370 | * So this callback only sets the rcode if it hasn't already | |
371 | * been set and only does the cleanup if the transaction | |
372 | * failed and we didn't already get a status write. | |
373 | */ | |
374 | spin_lock_irqsave(&card->lock, flags); | |
375 | ||
376 | if (orb->rcode == -1) | |
377 | orb->rcode = rcode; | |
378 | if (orb->rcode != RCODE_COMPLETE) { | |
9ba136d0 | 379 | list_del(&orb->link); |
1b34e974 | 380 | spin_unlock_irqrestore(&card->lock, flags); |
9ba136d0 | 381 | orb->callback(orb, NULL); |
1b34e974 SR |
382 | } else { |
383 | spin_unlock_irqrestore(&card->lock, flags); | |
9ba136d0 | 384 | } |
e57d2011 | 385 | |
e57d2011 | 386 | kref_put(&orb->kref, free_orb); |
9ba136d0 KH |
387 | } |
388 | ||
389 | static void | |
5a3c2be6 | 390 | sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, |
9ba136d0 KH |
391 | int node_id, int generation, u64 offset) |
392 | { | |
5a3c2be6 | 393 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 KH |
394 | unsigned long flags; |
395 | ||
396 | orb->pointer.high = 0; | |
397 | orb->pointer.low = orb->request_bus; | |
2d826cc5 | 398 | fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer)); |
9ba136d0 KH |
399 | |
400 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 401 | list_add_tail(&orb->link, &lu->orb_list); |
9ba136d0 KH |
402 | spin_unlock_irqrestore(&device->card->lock, flags); |
403 | ||
e57d2011 KH |
404 | /* Take a ref for the orb list and for the transaction callback. */ |
405 | kref_get(&orb->kref); | |
406 | kref_get(&orb->kref); | |
407 | ||
9ba136d0 | 408 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
f1397490 | 409 | node_id, generation, device->max_speed, offset, |
2d826cc5 | 410 | &orb->pointer, sizeof(orb->pointer), |
9ba136d0 KH |
411 | complete_transaction, orb); |
412 | } | |
413 | ||
5a3c2be6 | 414 | static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |
9ba136d0 | 415 | { |
5a3c2be6 | 416 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 KH |
417 | struct sbp2_orb *orb, *next; |
418 | struct list_head list; | |
419 | unsigned long flags; | |
2aaad97b | 420 | int retval = -ENOENT; |
9ba136d0 KH |
421 | |
422 | INIT_LIST_HEAD(&list); | |
423 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 424 | list_splice_init(&lu->orb_list, &list); |
9ba136d0 KH |
425 | spin_unlock_irqrestore(&device->card->lock, flags); |
426 | ||
427 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 428 | retval = 0; |
730c32f5 KH |
429 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
430 | continue; | |
431 | ||
9ba136d0 KH |
432 | orb->rcode = RCODE_CANCELLED; |
433 | orb->callback(orb, NULL); | |
434 | } | |
9ba136d0 | 435 | |
2aaad97b | 436 | return retval; |
1d3d52c5 KH |
437 | } |
438 | ||
9ba136d0 KH |
439 | static void |
440 | complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
441 | { | |
442 | struct sbp2_management_orb *orb = | |
6f061487 | 443 | container_of(base_orb, struct sbp2_management_orb, base); |
9ba136d0 KH |
444 | |
445 | if (status) | |
2d826cc5 | 446 | memcpy(&orb->status, status, sizeof(*status)); |
9ba136d0 KH |
447 | complete(&orb->done); |
448 | } | |
449 | ||
450 | static int | |
5a3c2be6 SR |
451 | sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id, |
452 | int generation, int function, int lun_or_login_id, | |
453 | void *response) | |
9ba136d0 | 454 | { |
5a3c2be6 | 455 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 | 456 | struct sbp2_management_orb *orb; |
9ba136d0 KH |
457 | int retval = -ENOMEM; |
458 | ||
2d826cc5 | 459 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
460 | if (orb == NULL) |
461 | return -ENOMEM; | |
462 | ||
e57d2011 | 463 | kref_init(&orb->base.kref); |
9ba136d0 KH |
464 | orb->response_bus = |
465 | dma_map_single(device->card->device, &orb->response, | |
2d826cc5 | 466 | sizeof(orb->response), DMA_FROM_DEVICE); |
82eff9db | 467 | if (dma_mapping_error(orb->response_bus)) |
7aa48481 | 468 | goto fail_mapping_response; |
9ba136d0 KH |
469 | |
470 | orb->request.response.high = 0; | |
471 | orb->request.response.low = orb->response_bus; | |
472 | ||
473 | orb->request.misc = | |
a77754a7 KH |
474 | MANAGEMENT_ORB_NOTIFY | |
475 | MANAGEMENT_ORB_FUNCTION(function) | | |
5a3c2be6 | 476 | MANAGEMENT_ORB_LUN(lun_or_login_id); |
9ba136d0 | 477 | orb->request.length = |
2d826cc5 | 478 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)); |
9ba136d0 | 479 | |
5a3c2be6 SR |
480 | orb->request.status_fifo.high = lu->address_handler.offset >> 32; |
481 | orb->request.status_fifo.low = lu->address_handler.offset; | |
9ba136d0 | 482 | |
9ba136d0 KH |
483 | if (function == SBP2_LOGIN_REQUEST) { |
484 | orb->request.misc |= | |
5cd54c94 | 485 | MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login) | |
a77754a7 | 486 | MANAGEMENT_ORB_RECONNECT(0); |
9ba136d0 KH |
487 | } |
488 | ||
2d826cc5 | 489 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); |
9ba136d0 KH |
490 | |
491 | init_completion(&orb->done); | |
492 | orb->base.callback = complete_management_orb; | |
2aaad97b | 493 | |
7aa48481 SR |
494 | orb->base.request_bus = |
495 | dma_map_single(device->card->device, &orb->request, | |
496 | sizeof(orb->request), DMA_TO_DEVICE); | |
497 | if (dma_mapping_error(orb->base.request_bus)) | |
498 | goto fail_mapping_request; | |
499 | ||
5a3c2be6 SR |
500 | sbp2_send_orb(&orb->base, lu, node_id, generation, |
501 | lu->tgt->management_agent_address); | |
9ba136d0 | 502 | |
2aaad97b KH |
503 | wait_for_completion_timeout(&orb->done, |
504 | msecs_to_jiffies(SBP2_ORB_TIMEOUT)); | |
9ba136d0 | 505 | |
9ba136d0 | 506 | retval = -EIO; |
5a3c2be6 | 507 | if (sbp2_cancel_orbs(lu) == 0) { |
2aaad97b | 508 | fw_error("orb reply timed out, rcode=0x%02x\n", |
9ba136d0 KH |
509 | orb->base.rcode); |
510 | goto out; | |
511 | } | |
512 | ||
2aaad97b KH |
513 | if (orb->base.rcode != RCODE_COMPLETE) { |
514 | fw_error("management write failed, rcode 0x%02x\n", | |
9ba136d0 KH |
515 | orb->base.rcode); |
516 | goto out; | |
517 | } | |
518 | ||
a77754a7 KH |
519 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
520 | STATUS_GET_SBP_STATUS(orb->status) != 0) { | |
9ba136d0 | 521 | fw_error("error status: %d:%d\n", |
a77754a7 KH |
522 | STATUS_GET_RESPONSE(orb->status), |
523 | STATUS_GET_SBP_STATUS(orb->status)); | |
9ba136d0 KH |
524 | goto out; |
525 | } | |
526 | ||
527 | retval = 0; | |
528 | out: | |
529 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 530 | sizeof(orb->request), DMA_TO_DEVICE); |
7aa48481 | 531 | fail_mapping_request: |
9ba136d0 | 532 | dma_unmap_single(device->card->device, orb->response_bus, |
2d826cc5 | 533 | sizeof(orb->response), DMA_FROM_DEVICE); |
7aa48481 | 534 | fail_mapping_response: |
9ba136d0 KH |
535 | if (response) |
536 | fw_memcpy_from_be32(response, | |
2d826cc5 | 537 | orb->response, sizeof(orb->response)); |
e57d2011 | 538 | kref_put(&orb->base.kref, free_orb); |
9ba136d0 KH |
539 | |
540 | return retval; | |
541 | } | |
542 | ||
543 | static void | |
544 | complete_agent_reset_write(struct fw_card *card, int rcode, | |
545 | void *payload, size_t length, void *data) | |
546 | { | |
547 | struct fw_transaction *t = data; | |
548 | ||
9ba136d0 KH |
549 | kfree(t); |
550 | } | |
551 | ||
5a3c2be6 | 552 | static int sbp2_agent_reset(struct sbp2_logical_unit *lu) |
9ba136d0 | 553 | { |
5a3c2be6 | 554 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 KH |
555 | struct fw_transaction *t; |
556 | static u32 zero; | |
557 | ||
2d826cc5 | 558 | t = kzalloc(sizeof(*t), GFP_ATOMIC); |
9ba136d0 KH |
559 | if (t == NULL) |
560 | return -ENOMEM; | |
561 | ||
562 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
5a3c2be6 SR |
563 | lu->tgt->node_id, lu->generation, device->max_speed, |
564 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
2d826cc5 | 565 | &zero, sizeof(zero), complete_agent_reset_write, t); |
9ba136d0 KH |
566 | |
567 | return 0; | |
568 | } | |
569 | ||
5a3c2be6 | 570 | static void sbp2_release_target(struct kref *kref) |
b3d6e151 | 571 | { |
5a3c2be6 SR |
572 | struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref); |
573 | struct sbp2_logical_unit *lu, *next; | |
574 | struct Scsi_Host *shost = | |
575 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
576 | ||
577 | list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { | |
578 | if (lu->sdev) | |
579 | scsi_remove_device(lu->sdev); | |
580 | ||
581 | sbp2_send_management_orb(lu, tgt->node_id, lu->generation, | |
582 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
583 | fw_core_remove_address_handler(&lu->address_handler); | |
584 | list_del(&lu->link); | |
585 | kfree(lu); | |
586 | } | |
587 | scsi_remove_host(shost); | |
588 | fw_notify("released %s\n", tgt->unit->device.bus_id); | |
589 | ||
590 | put_device(&tgt->unit->device); | |
591 | scsi_host_put(shost); | |
b3d6e151 KH |
592 | } |
593 | ||
5a3c2be6 SR |
594 | static void sbp2_reconnect(struct work_struct *work); |
595 | ||
7f37c426 KH |
596 | static void sbp2_login(struct work_struct *work) |
597 | { | |
5a3c2be6 SR |
598 | struct sbp2_logical_unit *lu = |
599 | container_of(work, struct sbp2_logical_unit, work.work); | |
600 | struct Scsi_Host *shost = | |
601 | container_of((void *)lu->tgt, struct Scsi_Host, hostdata[0]); | |
602 | struct scsi_device *sdev; | |
603 | struct scsi_lun eight_bytes_lun; | |
604 | struct fw_unit *unit = lu->tgt->unit; | |
7f37c426 KH |
605 | struct fw_device *device = fw_device(unit->device.parent); |
606 | struct sbp2_login_response response; | |
5a3c2be6 | 607 | int generation, node_id, local_node_id; |
7f37c426 KH |
608 | |
609 | generation = device->card->generation; | |
610 | node_id = device->node->node_id; | |
611 | local_node_id = device->card->local_node->node_id; | |
612 | ||
5a3c2be6 SR |
613 | if (sbp2_send_management_orb(lu, node_id, generation, |
614 | SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { | |
615 | if (lu->retries++ < 5) { | |
616 | schedule_delayed_work(&lu->work, DIV_ROUND_UP(HZ, 5)); | |
7f37c426 | 617 | } else { |
5a3c2be6 SR |
618 | fw_error("failed to login to %s LUN %04x\n", |
619 | unit->device.bus_id, lu->lun); | |
620 | kref_put(&lu->tgt->kref, sbp2_release_target); | |
7f37c426 KH |
621 | } |
622 | return; | |
623 | } | |
624 | ||
5a3c2be6 SR |
625 | lu->generation = generation; |
626 | lu->tgt->node_id = node_id; | |
627 | lu->tgt->address_high = local_node_id << 16; | |
7f37c426 KH |
628 | |
629 | /* Get command block agent offset and login id. */ | |
5a3c2be6 | 630 | lu->command_block_agent_address = |
5c5539d8 | 631 | ((u64) (response.command_block_agent.high & 0xffff) << 32) | |
7f37c426 | 632 | response.command_block_agent.low; |
5a3c2be6 | 633 | lu->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response); |
7f37c426 | 634 | |
5a3c2be6 SR |
635 | fw_notify("logged in to %s LUN %04x (%d retries)\n", |
636 | unit->device.bus_id, lu->lun, lu->retries); | |
7f37c426 KH |
637 | |
638 | #if 0 | |
639 | /* FIXME: The linux1394 sbp2 does this last step. */ | |
640 | sbp2_set_busy_timeout(scsi_id); | |
641 | #endif | |
642 | ||
5a3c2be6 SR |
643 | PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect); |
644 | sbp2_agent_reset(lu); | |
645 | ||
646 | memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); | |
647 | eight_bytes_lun.scsi_lun[0] = (lu->lun >> 8) & 0xff; | |
648 | eight_bytes_lun.scsi_lun[1] = lu->lun & 0xff; | |
7f37c426 | 649 | |
5a3c2be6 SR |
650 | sdev = __scsi_add_device(shost, 0, 0, |
651 | scsilun_to_int(&eight_bytes_lun), lu); | |
652 | if (IS_ERR(sdev)) { | |
653 | sbp2_send_management_orb(lu, node_id, generation, | |
654 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
c781c06d KH |
655 | /* |
656 | * Set this back to sbp2_login so we fall back and | |
657 | * retry login on bus reset. | |
658 | */ | |
5a3c2be6 SR |
659 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); |
660 | } else { | |
661 | lu->sdev = sdev; | |
662 | scsi_device_put(sdev); | |
7f37c426 | 663 | } |
5a3c2be6 | 664 | kref_put(&lu->tgt->kref, sbp2_release_target); |
7f37c426 | 665 | } |
9ba136d0 | 666 | |
5a3c2be6 | 667 | static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) |
9ba136d0 | 668 | { |
5a3c2be6 | 669 | struct sbp2_logical_unit *lu; |
9ba136d0 | 670 | |
5a3c2be6 SR |
671 | lu = kmalloc(sizeof(*lu), GFP_KERNEL); |
672 | if (!lu) | |
673 | return -ENOMEM; | |
9ba136d0 | 674 | |
5a3c2be6 SR |
675 | lu->address_handler.length = 0x100; |
676 | lu->address_handler.address_callback = sbp2_status_write; | |
677 | lu->address_handler.callback_data = lu; | |
9ba136d0 | 678 | |
5a3c2be6 SR |
679 | if (fw_core_add_address_handler(&lu->address_handler, |
680 | &fw_high_memory_region) < 0) { | |
681 | kfree(lu); | |
682 | return -ENOMEM; | |
683 | } | |
9ba136d0 | 684 | |
5a3c2be6 SR |
685 | lu->tgt = tgt; |
686 | lu->sdev = NULL; | |
687 | lu->lun = lun_entry & 0xffff; | |
688 | lu->retries = 0; | |
689 | INIT_LIST_HEAD(&lu->orb_list); | |
690 | INIT_DELAYED_WORK(&lu->work, sbp2_login); | |
9ba136d0 | 691 | |
5a3c2be6 SR |
692 | list_add_tail(&lu->link, &tgt->lu_list); |
693 | return 0; | |
694 | } | |
ad85274f | 695 | |
5a3c2be6 SR |
696 | static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory) |
697 | { | |
698 | struct fw_csr_iterator ci; | |
699 | int key, value; | |
9ba136d0 | 700 | |
5a3c2be6 SR |
701 | fw_csr_iterator_init(&ci, directory); |
702 | while (fw_csr_iterator_next(&ci, &key, &value)) | |
703 | if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && | |
704 | sbp2_add_logical_unit(tgt, value) < 0) | |
705 | return -ENOMEM; | |
706 | return 0; | |
707 | } | |
708 | ||
709 | static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory, | |
710 | u32 *model, u32 *firmware_revision) | |
711 | { | |
712 | struct fw_csr_iterator ci; | |
713 | int key, value; | |
714 | ||
715 | fw_csr_iterator_init(&ci, directory); | |
9ba136d0 KH |
716 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
717 | switch (key) { | |
5a3c2be6 | 718 | |
9ba136d0 | 719 | case CSR_DEPENDENT_INFO | CSR_OFFSET: |
5a3c2be6 SR |
720 | tgt->management_agent_address = |
721 | CSR_REGISTER_BASE + 4 * value; | |
9ba136d0 | 722 | break; |
5a3c2be6 SR |
723 | |
724 | case CSR_DIRECTORY_ID: | |
725 | tgt->directory_id = value; | |
9ba136d0 | 726 | break; |
5a3c2be6 | 727 | |
9ba136d0 | 728 | case CSR_MODEL: |
5a3c2be6 SR |
729 | *model = value; |
730 | break; | |
731 | ||
732 | case SBP2_CSR_FIRMWARE_REVISION: | |
733 | *firmware_revision = value; | |
734 | break; | |
735 | ||
736 | case SBP2_CSR_LOGICAL_UNIT_NUMBER: | |
737 | if (sbp2_add_logical_unit(tgt, value) < 0) | |
738 | return -ENOMEM; | |
739 | break; | |
740 | ||
741 | case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: | |
742 | if (sbp2_scan_logical_unit_dir(tgt, ci.p + value) < 0) | |
743 | return -ENOMEM; | |
9ba136d0 KH |
744 | break; |
745 | } | |
746 | } | |
5a3c2be6 SR |
747 | return 0; |
748 | } | |
749 | ||
750 | static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, | |
751 | u32 firmware_revision) | |
752 | { | |
753 | int i; | |
754 | ||
755 | tgt->workarounds = 0; | |
9ba136d0 KH |
756 | |
757 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
5a3c2be6 | 758 | |
9ba136d0 KH |
759 | if (sbp2_workarounds_table[i].firmware_revision != |
760 | (firmware_revision & 0xffffff00)) | |
761 | continue; | |
5a3c2be6 | 762 | |
9ba136d0 KH |
763 | if (sbp2_workarounds_table[i].model != model && |
764 | sbp2_workarounds_table[i].model != ~0) | |
765 | continue; | |
5a3c2be6 SR |
766 | |
767 | tgt->workarounds |= sbp2_workarounds_table[i].workarounds; | |
9ba136d0 KH |
768 | break; |
769 | } | |
770 | ||
5a3c2be6 SR |
771 | if (tgt->workarounds) |
772 | fw_notify("Workarounds for %s: 0x%x " | |
9ba136d0 | 773 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", |
5a3c2be6 SR |
774 | tgt->unit->device.bus_id, |
775 | tgt->workarounds, firmware_revision, model); | |
776 | } | |
777 | ||
778 | static struct scsi_host_template scsi_driver_template; | |
779 | ||
780 | static int sbp2_probe(struct device *dev) | |
781 | { | |
782 | struct fw_unit *unit = fw_unit(dev); | |
783 | struct fw_device *device = fw_device(unit->device.parent); | |
784 | struct sbp2_target *tgt; | |
785 | struct sbp2_logical_unit *lu; | |
786 | struct Scsi_Host *shost; | |
787 | u32 model, firmware_revision; | |
788 | ||
789 | shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); | |
790 | if (shost == NULL) | |
791 | return -ENOMEM; | |
792 | ||
793 | tgt = (struct sbp2_target *)shost->hostdata; | |
794 | unit->device.driver_data = tgt; | |
795 | tgt->unit = unit; | |
796 | kref_init(&tgt->kref); | |
797 | INIT_LIST_HEAD(&tgt->lu_list); | |
798 | ||
799 | if (fw_device_enable_phys_dma(device) < 0) | |
800 | goto fail_shost_put; | |
801 | ||
802 | if (scsi_add_host(shost, &unit->device) < 0) | |
803 | goto fail_shost_put; | |
804 | ||
805 | /* Initialize to values that won't match anything in our table. */ | |
806 | firmware_revision = 0xff000000; | |
807 | model = 0xff000000; | |
808 | ||
809 | /* implicit directory ID */ | |
810 | tgt->directory_id = ((unit->directory - device->config_rom) * 4 | |
811 | + CSR_CONFIG_ROM) & 0xffffff; | |
812 | ||
813 | if (sbp2_scan_unit_dir(tgt, unit->directory, &model, | |
814 | &firmware_revision) < 0) | |
815 | goto fail_tgt_put; | |
816 | ||
817 | sbp2_init_workarounds(tgt, model, firmware_revision); | |
9ba136d0 | 818 | |
b3d6e151 KH |
819 | get_device(&unit->device); |
820 | ||
c781c06d KH |
821 | /* |
822 | * We schedule work to do the login so we can easily | |
b3d6e151 | 823 | * reschedule retries. Always get the ref before scheduling |
c781c06d KH |
824 | * work. |
825 | */ | |
5a3c2be6 SR |
826 | list_for_each_entry(lu, &tgt->lu_list, link) |
827 | if (schedule_delayed_work(&lu->work, 0)) | |
828 | kref_get(&tgt->kref); | |
9ba136d0 | 829 | return 0; |
ad85274f | 830 | |
5a3c2be6 SR |
831 | fail_tgt_put: |
832 | kref_put(&tgt->kref, sbp2_release_target); | |
833 | return -ENOMEM; | |
834 | ||
835 | fail_shost_put: | |
836 | scsi_host_put(shost); | |
837 | return -ENOMEM; | |
9ba136d0 KH |
838 | } |
839 | ||
840 | static int sbp2_remove(struct device *dev) | |
841 | { | |
842 | struct fw_unit *unit = fw_unit(dev); | |
5a3c2be6 | 843 | struct sbp2_target *tgt = unit->device.driver_data; |
9ba136d0 | 844 | |
5a3c2be6 | 845 | kref_put(&tgt->kref, sbp2_release_target); |
9ba136d0 KH |
846 | return 0; |
847 | } | |
848 | ||
849 | static void sbp2_reconnect(struct work_struct *work) | |
850 | { | |
5a3c2be6 SR |
851 | struct sbp2_logical_unit *lu = |
852 | container_of(work, struct sbp2_logical_unit, work.work); | |
853 | struct fw_unit *unit = lu->tgt->unit; | |
9ba136d0 KH |
854 | struct fw_device *device = fw_device(unit->device.parent); |
855 | int generation, node_id, local_node_id; | |
856 | ||
9ba136d0 KH |
857 | generation = device->card->generation; |
858 | node_id = device->node->node_id; | |
859 | local_node_id = device->card->local_node->node_id; | |
860 | ||
5a3c2be6 | 861 | if (sbp2_send_management_orb(lu, node_id, generation, |
7f37c426 | 862 | SBP2_RECONNECT_REQUEST, |
5a3c2be6 SR |
863 | lu->login_id, NULL) < 0) { |
864 | if (lu->retries++ >= 5) { | |
7f37c426 KH |
865 | fw_error("failed to reconnect to %s\n", |
866 | unit->device.bus_id); | |
867 | /* Fall back and try to log in again. */ | |
5a3c2be6 SR |
868 | lu->retries = 0; |
869 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); | |
7f37c426 | 870 | } |
5a3c2be6 | 871 | schedule_delayed_work(&lu->work, DIV_ROUND_UP(HZ, 5)); |
7f37c426 KH |
872 | return; |
873 | } | |
9ba136d0 | 874 | |
5a3c2be6 SR |
875 | lu->generation = generation; |
876 | lu->tgt->node_id = node_id; | |
877 | lu->tgt->address_high = local_node_id << 16; | |
7f37c426 | 878 | |
5a3c2be6 SR |
879 | fw_notify("reconnected to %s LUN %04x (%d retries)\n", |
880 | unit->device.bus_id, lu->lun, lu->retries); | |
881 | ||
882 | sbp2_agent_reset(lu); | |
883 | sbp2_cancel_orbs(lu); | |
884 | ||
885 | kref_put(&lu->tgt->kref, sbp2_release_target); | |
9ba136d0 KH |
886 | } |
887 | ||
888 | static void sbp2_update(struct fw_unit *unit) | |
889 | { | |
5a3c2be6 SR |
890 | struct sbp2_target *tgt = unit->device.driver_data; |
891 | struct sbp2_logical_unit *lu; | |
9ba136d0 | 892 | |
5a3c2be6 SR |
893 | fw_device_enable_phys_dma(fw_device(unit->device.parent)); |
894 | ||
895 | /* | |
896 | * Fw-core serializes sbp2_update() against sbp2_remove(). | |
897 | * Iteration over tgt->lu_list is therefore safe here. | |
898 | */ | |
899 | list_for_each_entry(lu, &tgt->lu_list, link) { | |
900 | lu->retries = 0; | |
901 | if (schedule_delayed_work(&lu->work, 0)) | |
902 | kref_get(&tgt->kref); | |
903 | } | |
9ba136d0 KH |
904 | } |
905 | ||
906 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
907 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
908 | ||
21ebcd12 | 909 | static const struct fw_device_id sbp2_id_table[] = { |
9ba136d0 KH |
910 | { |
911 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, | |
912 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, | |
5af4e5ea | 913 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
914 | }, |
915 | { } | |
916 | }; | |
917 | ||
918 | static struct fw_driver sbp2_driver = { | |
919 | .driver = { | |
920 | .owner = THIS_MODULE, | |
921 | .name = sbp2_driver_name, | |
922 | .bus = &fw_bus_type, | |
923 | .probe = sbp2_probe, | |
924 | .remove = sbp2_remove, | |
925 | }, | |
926 | .update = sbp2_update, | |
927 | .id_table = sbp2_id_table, | |
928 | }; | |
929 | ||
fbb5423c KH |
930 | static unsigned int |
931 | sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) | |
9ba136d0 | 932 | { |
fbb5423c KH |
933 | int sam_status; |
934 | ||
9ba136d0 KH |
935 | sense_data[0] = 0x70; |
936 | sense_data[1] = 0x0; | |
937 | sense_data[2] = sbp2_status[1]; | |
938 | sense_data[3] = sbp2_status[4]; | |
939 | sense_data[4] = sbp2_status[5]; | |
940 | sense_data[5] = sbp2_status[6]; | |
941 | sense_data[6] = sbp2_status[7]; | |
942 | sense_data[7] = 10; | |
943 | sense_data[8] = sbp2_status[8]; | |
944 | sense_data[9] = sbp2_status[9]; | |
945 | sense_data[10] = sbp2_status[10]; | |
946 | sense_data[11] = sbp2_status[11]; | |
947 | sense_data[12] = sbp2_status[2]; | |
948 | sense_data[13] = sbp2_status[3]; | |
949 | sense_data[14] = sbp2_status[12]; | |
950 | sense_data[15] = sbp2_status[13]; | |
951 | ||
fbb5423c | 952 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 953 | |
fbb5423c KH |
954 | switch (sam_status) { |
955 | case SAM_STAT_GOOD: | |
9ba136d0 | 956 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 957 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 958 | case SAM_STAT_BUSY: |
9ba136d0 KH |
959 | case SAM_STAT_RESERVATION_CONFLICT: |
960 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
961 | return DID_OK << 16 | sam_status; |
962 | ||
9ba136d0 | 963 | default: |
fbb5423c | 964 | return DID_ERROR << 16; |
9ba136d0 KH |
965 | } |
966 | } | |
967 | ||
968 | static void | |
969 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
970 | { | |
6f061487 JF |
971 | struct sbp2_command_orb *orb = |
972 | container_of(base_orb, struct sbp2_command_orb, base); | |
5a3c2be6 | 973 | struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent); |
9ba136d0 KH |
974 | int result; |
975 | ||
976 | if (status != NULL) { | |
a77754a7 | 977 | if (STATUS_GET_DEAD(*status)) |
5a3c2be6 | 978 | sbp2_agent_reset(orb->lu); |
9ba136d0 | 979 | |
a77754a7 | 980 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 981 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 982 | result = DID_OK << 16; |
9ba136d0 KH |
983 | break; |
984 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 985 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
986 | break; |
987 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
988 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
989 | default: | |
fbb5423c | 990 | result = DID_ERROR << 16; |
9ba136d0 KH |
991 | break; |
992 | } | |
993 | ||
a77754a7 KH |
994 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
995 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
996 | orb->cmd->sense_buffer); |
997 | } else { | |
c781c06d KH |
998 | /* |
999 | * If the orb completes with status == NULL, something | |
9ba136d0 | 1000 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
1001 | * or when sending the write (less likely). |
1002 | */ | |
fbb5423c | 1003 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
1004 | } |
1005 | ||
1006 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 1007 | sizeof(orb->request), DMA_TO_DEVICE); |
9ba136d0 | 1008 | |
412edf65 SR |
1009 | if (scsi_sg_count(orb->cmd) > 0) |
1010 | dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd), | |
1011 | scsi_sg_count(orb->cmd), | |
9ba136d0 | 1012 | orb->cmd->sc_data_direction); |
9ba136d0 KH |
1013 | |
1014 | if (orb->page_table_bus != 0) | |
1015 | dma_unmap_single(device->card->device, orb->page_table_bus, | |
b4be016a | 1016 | sizeof(orb->page_table), DMA_TO_DEVICE); |
9ba136d0 | 1017 | |
fbb5423c | 1018 | orb->cmd->result = result; |
9ba136d0 | 1019 | orb->done(orb->cmd); |
9ba136d0 KH |
1020 | } |
1021 | ||
5a3c2be6 SR |
1022 | static int |
1023 | sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device, | |
1024 | struct sbp2_logical_unit *lu) | |
9ba136d0 | 1025 | { |
9ba136d0 KH |
1026 | struct scatterlist *sg; |
1027 | int sg_len, l, i, j, count; | |
9ba136d0 KH |
1028 | dma_addr_t sg_addr; |
1029 | ||
412edf65 SR |
1030 | sg = scsi_sglist(orb->cmd); |
1031 | count = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd), | |
9ba136d0 | 1032 | orb->cmd->sc_data_direction); |
95ffc5e3 KH |
1033 | if (count == 0) |
1034 | goto fail; | |
9ba136d0 | 1035 | |
c781c06d KH |
1036 | /* |
1037 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
1038 | * the scatter list by converting it to an immediate block |
1039 | * request. This is also a workaround for broken devices such | |
1040 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
1041 | * tables. |
1042 | */ | |
9ba136d0 | 1043 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { |
5a3c2be6 | 1044 | orb->request.data_descriptor.high = lu->tgt->address_high; |
9ba136d0 | 1045 | orb->request.data_descriptor.low = sg_dma_address(sg); |
5a3c2be6 | 1046 | orb->request.misc |= COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)); |
95ffc5e3 | 1047 | return 0; |
9ba136d0 KH |
1048 | } |
1049 | ||
c781c06d KH |
1050 | /* |
1051 | * Convert the scatterlist to an sbp2 page table. If any | |
36abb3b1 KHSR |
1052 | * scatterlist entries are too big for sbp2, we split them as we |
1053 | * go. Even if we ask the block I/O layer to not give us sg | |
1054 | * elements larger than 65535 bytes, some IOMMUs may merge sg elements | |
1055 | * during DMA mapping, and Linux currently doesn't prevent this. | |
c781c06d | 1056 | */ |
9ba136d0 KH |
1057 | for (i = 0, j = 0; i < count; i++) { |
1058 | sg_len = sg_dma_len(sg + i); | |
1059 | sg_addr = sg_dma_address(sg + i); | |
1060 | while (sg_len) { | |
332ef331 SR |
1061 | /* FIXME: This won't get us out of the pinch. */ |
1062 | if (unlikely(j >= ARRAY_SIZE(orb->page_table))) { | |
1063 | fw_error("page table overflow\n"); | |
1064 | goto fail_page_table; | |
1065 | } | |
9ba136d0 KH |
1066 | l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH); |
1067 | orb->page_table[j].low = sg_addr; | |
1068 | orb->page_table[j].high = (l << 16); | |
1069 | sg_addr += l; | |
1070 | sg_len -= l; | |
1071 | j++; | |
1072 | } | |
1073 | } | |
1074 | ||
b4be016a SR |
1075 | fw_memcpy_to_be32(orb->page_table, orb->page_table, |
1076 | sizeof(orb->page_table[0]) * j); | |
1077 | orb->page_table_bus = | |
1078 | dma_map_single(device->card->device, orb->page_table, | |
1079 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
1080 | if (dma_mapping_error(orb->page_table_bus)) | |
1081 | goto fail_page_table; | |
9ba136d0 | 1082 | |
c781c06d KH |
1083 | /* |
1084 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
1085 | * to fill in the node ID part of the address. All other |
1086 | * pointers assume that the data referenced reside on the | |
1087 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
1088 | * on other nodes so we need to put our ID in descriptor.high. |
1089 | */ | |
5a3c2be6 | 1090 | orb->request.data_descriptor.high = lu->tgt->address_high; |
9ba136d0 KH |
1091 | orb->request.data_descriptor.low = orb->page_table_bus; |
1092 | orb->request.misc |= | |
a77754a7 KH |
1093 | COMMAND_ORB_PAGE_TABLE_PRESENT | |
1094 | COMMAND_ORB_DATA_SIZE(j); | |
9ba136d0 | 1095 | |
95ffc5e3 KH |
1096 | return 0; |
1097 | ||
1098 | fail_page_table: | |
412edf65 | 1099 | dma_unmap_sg(device->card->device, sg, scsi_sg_count(orb->cmd), |
95ffc5e3 KH |
1100 | orb->cmd->sc_data_direction); |
1101 | fail: | |
1102 | return -ENOMEM; | |
9ba136d0 KH |
1103 | } |
1104 | ||
9ba136d0 KH |
1105 | /* SCSI stack integration */ |
1106 | ||
1107 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |
1108 | { | |
5a3c2be6 SR |
1109 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
1110 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); | |
9ba136d0 | 1111 | struct sbp2_command_orb *orb; |
25659f71 | 1112 | unsigned max_payload; |
5a3c2be6 | 1113 | int retval = SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1114 | |
c781c06d KH |
1115 | /* |
1116 | * Bidirectional commands are not yet implemented, and unknown | |
1117 | * transfer direction not handled. | |
1118 | */ | |
9ba136d0 | 1119 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
8a8cea27 | 1120 | fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n"); |
e1b68c4d KH |
1121 | cmd->result = DID_ERROR << 16; |
1122 | done(cmd); | |
1123 | return 0; | |
9ba136d0 KH |
1124 | } |
1125 | ||
2d826cc5 | 1126 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
1127 | if (orb == NULL) { |
1128 | fw_notify("failed to alloc orb\n"); | |
5a3c2be6 | 1129 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 KH |
1130 | } |
1131 | ||
12f26aa1 KH |
1132 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
1133 | orb->base.rcode = -1; | |
e57d2011 | 1134 | kref_init(&orb->base.kref); |
9ba136d0 | 1135 | |
5a3c2be6 | 1136 | orb->lu = lu; |
9ba136d0 KH |
1137 | orb->done = done; |
1138 | orb->cmd = cmd; | |
1139 | ||
1140 | orb->request.next.high = SBP2_ORB_NULL; | |
1141 | orb->request.next.low = 0x0; | |
c781c06d KH |
1142 | /* |
1143 | * At speed 100 we can do 512 bytes per packet, at speed 200, | |
9ba136d0 KH |
1144 | * 1024 bytes per packet etc. The SBP-2 max_payload field |
1145 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
c781c06d KH |
1146 | * if we set this to max_speed + 7, we get the right value. |
1147 | */ | |
25659f71 SR |
1148 | max_payload = min(device->max_speed + 7, |
1149 | device->card->max_receive - 1); | |
9ba136d0 | 1150 | orb->request.misc = |
25659f71 | 1151 | COMMAND_ORB_MAX_PAYLOAD(max_payload) | |
f1397490 | 1152 | COMMAND_ORB_SPEED(device->max_speed) | |
a77754a7 | 1153 | COMMAND_ORB_NOTIFY; |
9ba136d0 KH |
1154 | |
1155 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
1156 | orb->request.misc |= | |
a77754a7 | 1157 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_FROM_MEDIA); |
9ba136d0 KH |
1158 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) |
1159 | orb->request.misc |= | |
a77754a7 | 1160 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA); |
9ba136d0 | 1161 | |
5a3c2be6 SR |
1162 | if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) |
1163 | goto out; | |
9ba136d0 | 1164 | |
2d826cc5 | 1165 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); |
9ba136d0 KH |
1166 | |
1167 | memset(orb->request.command_block, | |
2d826cc5 | 1168 | 0, sizeof(orb->request.command_block)); |
9ba136d0 KH |
1169 | memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); |
1170 | ||
1171 | orb->base.callback = complete_command_orb; | |
8526392a SR |
1172 | orb->base.request_bus = |
1173 | dma_map_single(device->card->device, &orb->request, | |
1174 | sizeof(orb->request), DMA_TO_DEVICE); | |
1175 | if (dma_mapping_error(orb->base.request_bus)) | |
5a3c2be6 | 1176 | goto out; |
82eff9db | 1177 | |
5a3c2be6 SR |
1178 | sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, lu->generation, |
1179 | lu->command_block_agent_address + SBP2_ORB_POINTER); | |
1180 | retval = 0; | |
1181 | out: | |
e57d2011 | 1182 | kref_put(&orb->base.kref, free_orb); |
5a3c2be6 | 1183 | return retval; |
9ba136d0 KH |
1184 | } |
1185 | ||
cfb01381 SR |
1186 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1187 | { | |
5a3c2be6 | 1188 | struct sbp2_logical_unit *lu = sdev->hostdata; |
cfb01381 SR |
1189 | |
1190 | sdev->allow_restart = 1; | |
1191 | ||
5a3c2be6 | 1192 | if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
cfb01381 | 1193 | sdev->inquiry_len = 36; |
5a3c2be6 | 1194 | |
cfb01381 SR |
1195 | return 0; |
1196 | } | |
1197 | ||
9ba136d0 KH |
1198 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1199 | { | |
5a3c2be6 | 1200 | struct sbp2_logical_unit *lu = sdev->hostdata; |
9ba136d0 | 1201 | |
cfb01381 SR |
1202 | sdev->use_10_for_rw = 1; |
1203 | ||
1204 | if (sdev->type == TYPE_ROM) | |
1205 | sdev->use_10_for_ms = 1; | |
5a3c2be6 | 1206 | |
9ba136d0 | 1207 | if (sdev->type == TYPE_DISK && |
5a3c2be6 | 1208 | lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
9ba136d0 | 1209 | sdev->skip_ms_page_8 = 1; |
5a3c2be6 SR |
1210 | |
1211 | if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) | |
9ba136d0 | 1212 | sdev->fix_capacity = 1; |
5a3c2be6 SR |
1213 | |
1214 | if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) | |
cf47c7a2 | 1215 | blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); |
5a3c2be6 | 1216 | |
9ba136d0 KH |
1217 | return 0; |
1218 | } | |
1219 | ||
1220 | /* | |
1221 | * Called by scsi stack when something has really gone wrong. Usually | |
1222 | * called when a command has timed-out for some reason. | |
1223 | */ | |
1224 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1225 | { | |
5a3c2be6 | 1226 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
9ba136d0 KH |
1227 | |
1228 | fw_notify("sbp2_scsi_abort\n"); | |
5a3c2be6 SR |
1229 | sbp2_agent_reset(lu); |
1230 | sbp2_cancel_orbs(lu); | |
9ba136d0 KH |
1231 | |
1232 | return SUCCESS; | |
1233 | } | |
1234 | ||
14e21986 SR |
1235 | /* |
1236 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: | |
1237 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) | |
1238 | * | |
1239 | * This is the concatenation of target port identifier and logical unit | |
1240 | * identifier as per SAM-2...SAM-4 annex A. | |
1241 | */ | |
1242 | static ssize_t | |
1243 | sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, | |
1244 | char *buf) | |
1245 | { | |
1246 | struct scsi_device *sdev = to_scsi_device(dev); | |
5a3c2be6 | 1247 | struct sbp2_logical_unit *lu; |
14e21986 | 1248 | struct fw_device *device; |
14e21986 SR |
1249 | |
1250 | if (!sdev) | |
1251 | return 0; | |
14e21986 | 1252 | |
5a3c2be6 SR |
1253 | lu = sdev->hostdata; |
1254 | device = fw_device(lu->tgt->unit->device.parent); | |
14e21986 SR |
1255 | |
1256 | return sprintf(buf, "%08x%08x:%06x:%04x\n", | |
1257 | device->config_rom[3], device->config_rom[4], | |
5a3c2be6 | 1258 | lu->tgt->directory_id, lu->lun); |
14e21986 SR |
1259 | } |
1260 | ||
1261 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
1262 | ||
1263 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { | |
1264 | &dev_attr_ieee1394_id, | |
1265 | NULL | |
1266 | }; | |
1267 | ||
9ba136d0 KH |
1268 | static struct scsi_host_template scsi_driver_template = { |
1269 | .module = THIS_MODULE, | |
1270 | .name = "SBP-2 IEEE-1394", | |
b02b6bc4 | 1271 | .proc_name = sbp2_driver_name, |
9ba136d0 | 1272 | .queuecommand = sbp2_scsi_queuecommand, |
cfb01381 | 1273 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1274 | .slave_configure = sbp2_scsi_slave_configure, |
1275 | .eh_abort_handler = sbp2_scsi_abort, | |
1276 | .this_id = -1, | |
1277 | .sg_tablesize = SG_ALL, | |
1278 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1279 | .cmd_per_lun = 1, |
1280 | .can_queue = 1, | |
14e21986 | 1281 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
9ba136d0 KH |
1282 | }; |
1283 | ||
9ba136d0 KH |
1284 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1285 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1286 | MODULE_LICENSE("GPL"); | |
1287 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1288 | ||
1e4c7b0d OH |
1289 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1290 | #ifndef CONFIG_IEEE1394_SBP2_MODULE | |
1291 | MODULE_ALIAS("sbp2"); | |
1292 | #endif | |
1293 | ||
9ba136d0 KH |
1294 | static int __init sbp2_init(void) |
1295 | { | |
1296 | return driver_register(&sbp2_driver.driver); | |
1297 | } | |
1298 | ||
1299 | static void __exit sbp2_cleanup(void) | |
1300 | { | |
1301 | driver_unregister(&sbp2_driver.driver); | |
1302 | } | |
1303 | ||
1304 | module_init(sbp2_init); | |
1305 | module_exit(sbp2_cleanup); |