Commit | Line | Data |
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9ba136d0 | 1 | /* -*- c-basic-offset: 8 -*- |
1da0c93b | 2 | * fw-spb2.c -- 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 | ||
27a15e50 KH |
21 | /* The basic structure of this driver is based the old storage driver, |
22 | * drivers/ieee1394/sbp2.c, originally written by | |
23 | * James Goodwin <jamesg@filanet.com> | |
24 | * with later contributions and ongoing maintenance from | |
25 | * Ben Collins <bcollins@debian.org>, | |
26 | * Stefan Richter <stefanr@s5r6.in-berlin.de> | |
27 | * and many others. | |
28 | */ | |
29 | ||
9ba136d0 KH |
30 | #include <linux/kernel.h> |
31 | #include <linux/module.h> | |
fe69ca3a | 32 | #include <linux/mod_devicetable.h> |
9ba136d0 | 33 | #include <linux/device.h> |
0b5b2903 | 34 | #include <linux/scatterlist.h> |
9ba136d0 | 35 | #include <linux/dma-mapping.h> |
1d3d52c5 | 36 | #include <linux/timer.h> |
9ba136d0 KH |
37 | |
38 | #include <scsi/scsi.h> | |
39 | #include <scsi/scsi_cmnd.h> | |
40 | #include <scsi/scsi_dbg.h> | |
41 | #include <scsi/scsi_device.h> | |
42 | #include <scsi/scsi_host.h> | |
43 | ||
44 | #include "fw-transaction.h" | |
45 | #include "fw-topology.h" | |
46 | #include "fw-device.h" | |
47 | ||
48 | /* I don't know why the SCSI stack doesn't define something like this... */ | |
49 | typedef void (*scsi_done_fn_t) (struct scsi_cmnd *); | |
50 | ||
51 | static const char sbp2_driver_name[] = "sbp2"; | |
52 | ||
53 | struct sbp2_device { | |
b3d6e151 | 54 | struct kref kref; |
9ba136d0 KH |
55 | struct fw_unit *unit; |
56 | struct fw_address_handler address_handler; | |
57 | struct list_head orb_list; | |
58 | u64 management_agent_address; | |
59 | u64 command_block_agent_address; | |
60 | u32 workarounds; | |
61 | int login_id; | |
62 | ||
63 | /* We cache these addresses and only update them once we've | |
64 | * logged in or reconnected to the sbp2 device. That way, any | |
65 | * IO to the device will automatically fail and get retried if | |
66 | * it happens in a window where the device is not ready to | |
67 | * handle it (e.g. after a bus reset but before we reconnect). */ | |
68 | int node_id; | |
69 | int address_high; | |
70 | int generation; | |
71 | ||
7f37c426 KH |
72 | int retries; |
73 | struct delayed_work work; | |
9ba136d0 KH |
74 | struct Scsi_Host *scsi_host; |
75 | }; | |
76 | ||
77 | #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 | |
78 | #define SBP2_MAX_SECTORS 255 /* Max sectors supported */ | |
1d3d52c5 | 79 | #define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */ |
9ba136d0 KH |
80 | |
81 | #define SBP2_ORB_NULL 0x80000000 | |
82 | ||
83 | #define SBP2_DIRECTION_TO_MEDIA 0x0 | |
84 | #define SBP2_DIRECTION_FROM_MEDIA 0x1 | |
85 | ||
86 | /* Unit directory keys */ | |
87 | #define SBP2_COMMAND_SET_SPECIFIER 0x38 | |
88 | #define SBP2_COMMAND_SET 0x39 | |
89 | #define SBP2_COMMAND_SET_REVISION 0x3b | |
90 | #define SBP2_FIRMWARE_REVISION 0x3c | |
91 | ||
92 | /* Flags for detected oddities and brokeness */ | |
93 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 | |
94 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 | |
95 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 | |
96 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 | |
97 | #define SBP2_WORKAROUND_OVERRIDE 0x100 | |
98 | ||
99 | /* Management orb opcodes */ | |
100 | #define SBP2_LOGIN_REQUEST 0x0 | |
101 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
102 | #define SBP2_RECONNECT_REQUEST 0x3 | |
103 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
104 | #define SBP2_LOGOUT_REQUEST 0x7 | |
105 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
106 | #define SBP2_ABORT_TASK_SET 0xc | |
107 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
108 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
109 | ||
110 | /* Offsets for command block agent registers */ | |
111 | #define SBP2_AGENT_STATE 0x00 | |
112 | #define SBP2_AGENT_RESET 0x04 | |
113 | #define SBP2_ORB_POINTER 0x08 | |
114 | #define SBP2_DOORBELL 0x10 | |
115 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
116 | ||
117 | /* Status write response codes */ | |
118 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
119 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
120 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
121 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
122 | ||
123 | #define status_get_orb_high(v) ((v).status & 0xffff) | |
124 | #define status_get_sbp_status(v) (((v).status >> 16) & 0xff) | |
125 | #define status_get_len(v) (((v).status >> 24) & 0x07) | |
126 | #define status_get_dead(v) (((v).status >> 27) & 0x01) | |
127 | #define status_get_response(v) (((v).status >> 28) & 0x03) | |
128 | #define status_get_source(v) (((v).status >> 30) & 0x03) | |
129 | #define status_get_orb_low(v) ((v).orb_low) | |
130 | #define status_get_data(v) ((v).data) | |
131 | ||
132 | struct sbp2_status { | |
133 | u32 status; | |
134 | u32 orb_low; | |
135 | u8 data[24]; | |
136 | }; | |
137 | ||
138 | struct sbp2_pointer { | |
139 | u32 high; | |
140 | u32 low; | |
141 | }; | |
142 | ||
143 | struct sbp2_orb { | |
144 | struct fw_transaction t; | |
145 | dma_addr_t request_bus; | |
146 | int rcode; | |
147 | struct sbp2_pointer pointer; | |
148 | void (*callback) (struct sbp2_orb * orb, struct sbp2_status * status); | |
149 | struct list_head link; | |
150 | }; | |
151 | ||
152 | #define management_orb_lun(v) ((v)) | |
153 | #define management_orb_function(v) ((v) << 16) | |
154 | #define management_orb_reconnect(v) ((v) << 20) | |
155 | #define management_orb_exclusive ((1) << 28) | |
156 | #define management_orb_request_format(v) ((v) << 29) | |
157 | #define management_orb_notify ((1) << 31) | |
158 | ||
159 | #define management_orb_response_length(v) ((v)) | |
160 | #define management_orb_password_length(v) ((v) << 16) | |
161 | ||
162 | struct sbp2_management_orb { | |
163 | struct sbp2_orb base; | |
164 | struct { | |
165 | struct sbp2_pointer password; | |
166 | struct sbp2_pointer response; | |
167 | u32 misc; | |
168 | u32 length; | |
169 | struct sbp2_pointer status_fifo; | |
170 | } request; | |
171 | __be32 response[4]; | |
172 | dma_addr_t response_bus; | |
173 | struct completion done; | |
174 | struct sbp2_status status; | |
175 | }; | |
176 | ||
177 | #define login_response_get_login_id(v) ((v).misc & 0xffff) | |
178 | #define login_response_get_length(v) (((v).misc >> 16) & 0xffff) | |
179 | ||
180 | struct sbp2_login_response { | |
181 | u32 misc; | |
182 | struct sbp2_pointer command_block_agent; | |
183 | u32 reconnect_hold; | |
184 | }; | |
185 | ||
186 | #define command_orb_data_size(v) ((v)) | |
187 | #define command_orb_page_size(v) ((v) << 16) | |
188 | #define command_orb_page_table_present ((1) << 19) | |
189 | #define command_orb_max_payload(v) ((v) << 20) | |
190 | #define command_orb_speed(v) ((v) << 24) | |
191 | #define command_orb_direction(v) ((v) << 27) | |
192 | #define command_orb_request_format(v) ((v) << 29) | |
193 | #define command_orb_notify ((1) << 31) | |
194 | ||
195 | struct sbp2_command_orb { | |
196 | struct sbp2_orb base; | |
197 | struct { | |
198 | struct sbp2_pointer next; | |
199 | struct sbp2_pointer data_descriptor; | |
200 | u32 misc; | |
201 | u8 command_block[12]; | |
202 | } request; | |
203 | struct scsi_cmnd *cmd; | |
204 | scsi_done_fn_t done; | |
205 | struct fw_unit *unit; | |
206 | ||
207 | struct sbp2_pointer page_table[SG_ALL]; | |
208 | dma_addr_t page_table_bus; | |
209 | dma_addr_t request_buffer_bus; | |
210 | }; | |
211 | ||
212 | /* | |
213 | * List of devices with known bugs. | |
214 | * | |
215 | * The firmware_revision field, masked with 0xffff00, is the best | |
216 | * indicator for the type of bridge chip of a device. It yields a few | |
217 | * false positives but this did not break correctly behaving devices | |
218 | * so far. We use ~0 as a wildcard, since the 24 bit values we get | |
219 | * from the config rom can never match that. | |
220 | */ | |
221 | static const struct { | |
222 | u32 firmware_revision; | |
223 | u32 model; | |
224 | unsigned workarounds; | |
225 | } sbp2_workarounds_table[] = { | |
226 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
227 | .firmware_revision = 0x002800, | |
228 | .model = 0x001010, | |
229 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
230 | SBP2_WORKAROUND_MODE_SENSE_8, | |
231 | }, | |
232 | /* Initio bridges, actually only needed for some older ones */ { | |
233 | .firmware_revision = 0x000200, | |
234 | .model = ~0, | |
235 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
236 | }, | |
237 | /* Symbios bridge */ { | |
238 | .firmware_revision = 0xa0b800, | |
239 | .model = ~0, | |
240 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
241 | }, | |
242 | /* There are iPods (2nd gen, 3rd gen) with model_id == 0, but | |
243 | * these iPods do not feature the read_capacity bug according | |
244 | * to one report. Read_capacity behaviour as well as model_id | |
245 | * could change due to Apple-supplied firmware updates though. */ | |
246 | /* iPod 4th generation. */ { | |
247 | .firmware_revision = 0x0a2700, | |
248 | .model = 0x000021, | |
249 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
250 | }, | |
251 | /* iPod mini */ { | |
252 | .firmware_revision = 0x0a2700, | |
253 | .model = 0x000023, | |
254 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
255 | }, | |
256 | /* iPod Photo */ { | |
257 | .firmware_revision = 0x0a2700, | |
258 | .model = 0x00007e, | |
259 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
260 | } | |
261 | }; | |
262 | ||
263 | static void | |
264 | sbp2_status_write(struct fw_card *card, struct fw_request *request, | |
265 | int tcode, int destination, int source, | |
266 | int generation, int speed, | |
267 | unsigned long long offset, | |
268 | void *payload, size_t length, void *callback_data) | |
269 | { | |
270 | struct sbp2_device *sd = callback_data; | |
271 | struct sbp2_orb *orb; | |
272 | struct sbp2_status status; | |
273 | size_t header_size; | |
274 | unsigned long flags; | |
275 | ||
276 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
277 | length == 0 || length > sizeof status) { | |
278 | fw_send_response(card, request, RCODE_TYPE_ERROR); | |
279 | return; | |
280 | } | |
281 | ||
282 | header_size = min(length, 2 * sizeof(u32)); | |
283 | fw_memcpy_from_be32(&status, payload, header_size); | |
284 | if (length > header_size) | |
285 | memcpy(status.data, payload + 8, length - header_size); | |
286 | if (status_get_source(status) == 2 || status_get_source(status) == 3) { | |
287 | fw_notify("non-orb related status write, not handled\n"); | |
288 | fw_send_response(card, request, RCODE_COMPLETE); | |
289 | return; | |
290 | } | |
291 | ||
292 | /* Lookup the orb corresponding to this status write. */ | |
293 | spin_lock_irqsave(&card->lock, flags); | |
294 | list_for_each_entry(orb, &sd->orb_list, link) { | |
295 | if (status_get_orb_high(status) == 0 && | |
296 | status_get_orb_low(status) == orb->request_bus) { | |
297 | list_del(&orb->link); | |
298 | break; | |
299 | } | |
300 | } | |
301 | spin_unlock_irqrestore(&card->lock, flags); | |
302 | ||
303 | if (&orb->link != &sd->orb_list) | |
304 | orb->callback(orb, &status); | |
305 | else | |
306 | fw_error("status write for unknown orb\n"); | |
307 | ||
308 | fw_send_response(card, request, RCODE_COMPLETE); | |
309 | } | |
310 | ||
311 | static void | |
312 | complete_transaction(struct fw_card *card, int rcode, | |
313 | void *payload, size_t length, void *data) | |
314 | { | |
315 | struct sbp2_orb *orb = data; | |
316 | unsigned long flags; | |
317 | ||
318 | orb->rcode = rcode; | |
319 | if (rcode != RCODE_COMPLETE) { | |
320 | spin_lock_irqsave(&card->lock, flags); | |
321 | list_del(&orb->link); | |
322 | spin_unlock_irqrestore(&card->lock, flags); | |
323 | orb->callback(orb, NULL); | |
324 | } | |
325 | } | |
326 | ||
327 | static void | |
328 | sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, | |
329 | int node_id, int generation, u64 offset) | |
330 | { | |
331 | struct fw_device *device = fw_device(unit->device.parent); | |
332 | struct sbp2_device *sd = unit->device.driver_data; | |
333 | unsigned long flags; | |
334 | ||
335 | orb->pointer.high = 0; | |
336 | orb->pointer.low = orb->request_bus; | |
337 | fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof orb->pointer); | |
338 | ||
339 | spin_lock_irqsave(&device->card->lock, flags); | |
340 | list_add_tail(&orb->link, &sd->orb_list); | |
341 | spin_unlock_irqrestore(&device->card->lock, flags); | |
342 | ||
343 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, | |
907293d7 | 344 | node_id, generation, |
9ba136d0 KH |
345 | device->node->max_speed, offset, |
346 | &orb->pointer, sizeof orb->pointer, | |
347 | complete_transaction, orb); | |
348 | } | |
349 | ||
2aaad97b | 350 | static int sbp2_cancel_orbs(struct fw_unit *unit) |
9ba136d0 KH |
351 | { |
352 | struct fw_device *device = fw_device(unit->device.parent); | |
353 | struct sbp2_device *sd = unit->device.driver_data; | |
354 | struct sbp2_orb *orb, *next; | |
355 | struct list_head list; | |
356 | unsigned long flags; | |
2aaad97b | 357 | int retval = -ENOENT; |
9ba136d0 KH |
358 | |
359 | INIT_LIST_HEAD(&list); | |
360 | spin_lock_irqsave(&device->card->lock, flags); | |
361 | list_splice_init(&sd->orb_list, &list); | |
362 | spin_unlock_irqrestore(&device->card->lock, flags); | |
363 | ||
364 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 365 | retval = 0; |
730c32f5 KH |
366 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
367 | continue; | |
368 | ||
9ba136d0 KH |
369 | orb->rcode = RCODE_CANCELLED; |
370 | orb->callback(orb, NULL); | |
371 | } | |
9ba136d0 | 372 | |
2aaad97b | 373 | return retval; |
1d3d52c5 KH |
374 | } |
375 | ||
9ba136d0 KH |
376 | static void |
377 | complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
378 | { | |
379 | struct sbp2_management_orb *orb = | |
380 | (struct sbp2_management_orb *)base_orb; | |
381 | ||
382 | if (status) | |
383 | memcpy(&orb->status, status, sizeof *status); | |
384 | complete(&orb->done); | |
385 | } | |
386 | ||
387 | static int | |
388 | sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, | |
389 | int function, int lun, void *response) | |
390 | { | |
391 | struct fw_device *device = fw_device(unit->device.parent); | |
392 | struct sbp2_device *sd = unit->device.driver_data; | |
393 | struct sbp2_management_orb *orb; | |
9ba136d0 KH |
394 | int retval = -ENOMEM; |
395 | ||
396 | orb = kzalloc(sizeof *orb, GFP_ATOMIC); | |
397 | if (orb == NULL) | |
398 | return -ENOMEM; | |
399 | ||
400 | /* The sbp2 device is going to send a block read request to | |
401 | * read out the request from host memory, so map it for | |
402 | * dma. */ | |
403 | orb->base.request_bus = | |
404 | dma_map_single(device->card->device, &orb->request, | |
405 | sizeof orb->request, DMA_TO_DEVICE); | |
82eff9db | 406 | if (dma_mapping_error(orb->base.request_bus)) |
9ba136d0 KH |
407 | goto out; |
408 | ||
409 | orb->response_bus = | |
410 | dma_map_single(device->card->device, &orb->response, | |
411 | sizeof orb->response, DMA_FROM_DEVICE); | |
82eff9db | 412 | if (dma_mapping_error(orb->response_bus)) |
9ba136d0 KH |
413 | goto out; |
414 | ||
415 | orb->request.response.high = 0; | |
416 | orb->request.response.low = orb->response_bus; | |
417 | ||
418 | orb->request.misc = | |
419 | management_orb_notify | | |
420 | management_orb_function(function) | | |
421 | management_orb_lun(lun); | |
422 | orb->request.length = | |
423 | management_orb_response_length(sizeof orb->response); | |
424 | ||
425 | orb->request.status_fifo.high = sd->address_handler.offset >> 32; | |
426 | orb->request.status_fifo.low = sd->address_handler.offset; | |
427 | ||
428 | /* FIXME: Yeah, ok this isn't elegant, we hardwire exclusive | |
429 | * login and 1 second reconnect time. The reconnect setting | |
430 | * is probably fine, but the exclusive login should be an | |
431 | * option. */ | |
432 | if (function == SBP2_LOGIN_REQUEST) { | |
433 | orb->request.misc |= | |
434 | management_orb_exclusive | | |
435 | management_orb_reconnect(0); | |
436 | } | |
437 | ||
438 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request); | |
439 | ||
440 | init_completion(&orb->done); | |
441 | orb->base.callback = complete_management_orb; | |
2aaad97b | 442 | |
9ba136d0 KH |
443 | sbp2_send_orb(&orb->base, unit, |
444 | node_id, generation, sd->management_agent_address); | |
445 | ||
2aaad97b KH |
446 | wait_for_completion_timeout(&orb->done, |
447 | msecs_to_jiffies(SBP2_ORB_TIMEOUT)); | |
9ba136d0 | 448 | |
9ba136d0 | 449 | retval = -EIO; |
2aaad97b KH |
450 | if (sbp2_cancel_orbs(unit) == 0) { |
451 | fw_error("orb reply timed out, rcode=0x%02x\n", | |
9ba136d0 KH |
452 | orb->base.rcode); |
453 | goto out; | |
454 | } | |
455 | ||
2aaad97b KH |
456 | if (orb->base.rcode != RCODE_COMPLETE) { |
457 | fw_error("management write failed, rcode 0x%02x\n", | |
9ba136d0 KH |
458 | orb->base.rcode); |
459 | goto out; | |
460 | } | |
461 | ||
462 | if (status_get_response(orb->status) != 0 || | |
463 | status_get_sbp_status(orb->status) != 0) { | |
464 | fw_error("error status: %d:%d\n", | |
465 | status_get_response(orb->status), | |
466 | status_get_sbp_status(orb->status)); | |
467 | goto out; | |
468 | } | |
469 | ||
470 | retval = 0; | |
471 | out: | |
472 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
473 | sizeof orb->request, DMA_TO_DEVICE); | |
474 | dma_unmap_single(device->card->device, orb->response_bus, | |
475 | sizeof orb->response, DMA_FROM_DEVICE); | |
476 | ||
477 | if (response) | |
478 | fw_memcpy_from_be32(response, | |
479 | orb->response, sizeof orb->response); | |
480 | kfree(orb); | |
481 | ||
482 | return retval; | |
483 | } | |
484 | ||
485 | static void | |
486 | complete_agent_reset_write(struct fw_card *card, int rcode, | |
487 | void *payload, size_t length, void *data) | |
488 | { | |
489 | struct fw_transaction *t = data; | |
490 | ||
9ba136d0 KH |
491 | kfree(t); |
492 | } | |
493 | ||
494 | static int sbp2_agent_reset(struct fw_unit *unit) | |
495 | { | |
496 | struct fw_device *device = fw_device(unit->device.parent); | |
497 | struct sbp2_device *sd = unit->device.driver_data; | |
498 | struct fw_transaction *t; | |
499 | static u32 zero; | |
500 | ||
501 | t = kzalloc(sizeof *t, GFP_ATOMIC); | |
502 | if (t == NULL) | |
503 | return -ENOMEM; | |
504 | ||
505 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
907293d7 | 506 | sd->node_id, sd->generation, SCODE_400, |
9ba136d0 KH |
507 | sd->command_block_agent_address + SBP2_AGENT_RESET, |
508 | &zero, sizeof zero, complete_agent_reset_write, t); | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | static int add_scsi_devices(struct fw_unit *unit); | |
514 | static void remove_scsi_devices(struct fw_unit *unit); | |
7f37c426 KH |
515 | static void sbp2_reconnect(struct work_struct *work); |
516 | ||
b3d6e151 KH |
517 | static void |
518 | release_sbp2_device(struct kref *kref) | |
519 | { | |
520 | struct sbp2_device *sd = container_of(kref, struct sbp2_device, kref); | |
521 | ||
522 | sbp2_send_management_orb(sd->unit, sd->node_id, sd->generation, | |
523 | SBP2_LOGOUT_REQUEST, sd->login_id, NULL); | |
524 | ||
525 | remove_scsi_devices(sd->unit); | |
526 | ||
527 | fw_core_remove_address_handler(&sd->address_handler); | |
528 | fw_notify("removed sbp2 unit %s\n", sd->unit->device.bus_id); | |
529 | put_device(&sd->unit->device); | |
530 | kfree(sd); | |
531 | } | |
532 | ||
7f37c426 KH |
533 | static void sbp2_login(struct work_struct *work) |
534 | { | |
535 | struct sbp2_device *sd = | |
536 | container_of(work, struct sbp2_device, work.work); | |
537 | struct fw_unit *unit = sd->unit; | |
538 | struct fw_device *device = fw_device(unit->device.parent); | |
539 | struct sbp2_login_response response; | |
540 | int generation, node_id, local_node_id, lun, retval; | |
541 | ||
542 | /* FIXME: Make this work for multi-lun devices. */ | |
543 | lun = 0; | |
544 | ||
545 | generation = device->card->generation; | |
546 | node_id = device->node->node_id; | |
547 | local_node_id = device->card->local_node->node_id; | |
548 | ||
549 | if (sbp2_send_management_orb(unit, node_id, generation, | |
550 | SBP2_LOGIN_REQUEST, lun, &response) < 0) { | |
551 | if (sd->retries++ < 5) { | |
7f37c426 KH |
552 | schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); |
553 | } else { | |
554 | fw_error("failed to login to %s\n", | |
555 | unit->device.bus_id); | |
556 | remove_scsi_devices(unit); | |
b3d6e151 | 557 | kref_put(&sd->kref, release_sbp2_device); |
7f37c426 KH |
558 | } |
559 | return; | |
560 | } | |
561 | ||
562 | sd->generation = generation; | |
563 | sd->node_id = node_id; | |
564 | sd->address_high = local_node_id << 16; | |
565 | ||
566 | /* Get command block agent offset and login id. */ | |
567 | sd->command_block_agent_address = | |
5c5539d8 | 568 | ((u64) (response.command_block_agent.high & 0xffff) << 32) | |
7f37c426 KH |
569 | response.command_block_agent.low; |
570 | sd->login_id = login_response_get_login_id(response); | |
571 | ||
5c5539d8 KH |
572 | fw_notify("logged in to sbp2 unit %s (%d retries)\n", |
573 | unit->device.bus_id, sd->retries); | |
574 | fw_notify(" - management_agent_address: 0x%012llx\n", | |
7f37c426 KH |
575 | (unsigned long long) sd->management_agent_address); |
576 | fw_notify(" - command_block_agent_address: 0x%012llx\n", | |
577 | (unsigned long long) sd->command_block_agent_address); | |
5c5539d8 | 578 | fw_notify(" - status write address: 0x%012llx\n", |
7f37c426 KH |
579 | (unsigned long long) sd->address_handler.offset); |
580 | ||
581 | #if 0 | |
582 | /* FIXME: The linux1394 sbp2 does this last step. */ | |
583 | sbp2_set_busy_timeout(scsi_id); | |
584 | #endif | |
585 | ||
1da0c93b | 586 | PREPARE_DELAYED_WORK(&sd->work, sbp2_reconnect); |
7f37c426 KH |
587 | sbp2_agent_reset(unit); |
588 | ||
589 | retval = add_scsi_devices(unit); | |
590 | if (retval < 0) { | |
591 | sbp2_send_management_orb(unit, sd->node_id, sd->generation, | |
592 | SBP2_LOGOUT_REQUEST, sd->login_id, | |
593 | NULL); | |
594 | /* Set this back to sbp2_login so we fall back and | |
595 | * retry login on bus reset. */ | |
1da0c93b | 596 | PREPARE_DELAYED_WORK(&sd->work, sbp2_login); |
7f37c426 | 597 | } |
b3d6e151 | 598 | kref_put(&sd->kref, release_sbp2_device); |
7f37c426 | 599 | } |
9ba136d0 KH |
600 | |
601 | static int sbp2_probe(struct device *dev) | |
602 | { | |
603 | struct fw_unit *unit = fw_unit(dev); | |
604 | struct fw_device *device = fw_device(unit->device.parent); | |
605 | struct sbp2_device *sd; | |
606 | struct fw_csr_iterator ci; | |
7f37c426 | 607 | int i, key, value; |
9ba136d0 KH |
608 | u32 model, firmware_revision; |
609 | ||
610 | sd = kzalloc(sizeof *sd, GFP_KERNEL); | |
611 | if (sd == NULL) | |
612 | return -ENOMEM; | |
613 | ||
614 | unit->device.driver_data = sd; | |
615 | sd->unit = unit; | |
616 | INIT_LIST_HEAD(&sd->orb_list); | |
b3d6e151 | 617 | kref_init(&sd->kref); |
9ba136d0 KH |
618 | |
619 | sd->address_handler.length = 0x100; | |
620 | sd->address_handler.address_callback = sbp2_status_write; | |
621 | sd->address_handler.callback_data = sd; | |
622 | ||
623 | if (fw_core_add_address_handler(&sd->address_handler, | |
624 | &fw_high_memory_region) < 0) { | |
625 | kfree(sd); | |
626 | return -EBUSY; | |
627 | } | |
628 | ||
629 | if (fw_device_enable_phys_dma(device) < 0) { | |
630 | fw_core_remove_address_handler(&sd->address_handler); | |
631 | kfree(sd); | |
632 | return -EBUSY; | |
633 | } | |
634 | ||
635 | /* Scan unit directory to get management agent address, | |
636 | * firmware revison and model. Initialize firmware_revision | |
637 | * and model to values that wont match anything in our table. */ | |
638 | firmware_revision = 0xff000000; | |
639 | model = 0xff000000; | |
640 | fw_csr_iterator_init(&ci, unit->directory); | |
641 | while (fw_csr_iterator_next(&ci, &key, &value)) { | |
642 | switch (key) { | |
643 | case CSR_DEPENDENT_INFO | CSR_OFFSET: | |
644 | sd->management_agent_address = | |
645 | 0xfffff0000000ULL + 4 * value; | |
646 | break; | |
647 | case SBP2_FIRMWARE_REVISION: | |
648 | firmware_revision = value; | |
649 | break; | |
650 | case CSR_MODEL: | |
651 | model = value; | |
652 | break; | |
653 | } | |
654 | } | |
655 | ||
656 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
657 | if (sbp2_workarounds_table[i].firmware_revision != | |
658 | (firmware_revision & 0xffffff00)) | |
659 | continue; | |
660 | if (sbp2_workarounds_table[i].model != model && | |
661 | sbp2_workarounds_table[i].model != ~0) | |
662 | continue; | |
663 | sd->workarounds |= sbp2_workarounds_table[i].workarounds; | |
664 | break; | |
665 | } | |
666 | ||
667 | if (sd->workarounds) | |
668 | fw_notify("Workarounds for node %s: 0x%x " | |
669 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", | |
670 | unit->device.bus_id, | |
671 | sd->workarounds, firmware_revision, model); | |
672 | ||
b3d6e151 KH |
673 | get_device(&unit->device); |
674 | ||
7f37c426 | 675 | /* We schedule work to do the login so we can easily |
b3d6e151 KH |
676 | * reschedule retries. Always get the ref before scheduling |
677 | * work.*/ | |
7f37c426 | 678 | INIT_DELAYED_WORK(&sd->work, sbp2_login); |
b3d6e151 KH |
679 | if (schedule_delayed_work(&sd->work, 0)) |
680 | kref_get(&sd->kref); | |
9ba136d0 KH |
681 | |
682 | return 0; | |
683 | } | |
684 | ||
685 | static int sbp2_remove(struct device *dev) | |
686 | { | |
687 | struct fw_unit *unit = fw_unit(dev); | |
688 | struct sbp2_device *sd = unit->device.driver_data; | |
689 | ||
b3d6e151 | 690 | kref_put(&sd->kref, release_sbp2_device); |
9ba136d0 KH |
691 | |
692 | return 0; | |
693 | } | |
694 | ||
695 | static void sbp2_reconnect(struct work_struct *work) | |
696 | { | |
7f37c426 KH |
697 | struct sbp2_device *sd = |
698 | container_of(work, struct sbp2_device, work.work); | |
9ba136d0 KH |
699 | struct fw_unit *unit = sd->unit; |
700 | struct fw_device *device = fw_device(unit->device.parent); | |
701 | int generation, node_id, local_node_id; | |
702 | ||
9ba136d0 KH |
703 | generation = device->card->generation; |
704 | node_id = device->node->node_id; | |
705 | local_node_id = device->card->local_node->node_id; | |
706 | ||
7f37c426 KH |
707 | if (sbp2_send_management_orb(unit, node_id, generation, |
708 | SBP2_RECONNECT_REQUEST, | |
709 | sd->login_id, NULL) < 0) { | |
5c5539d8 | 710 | if (sd->retries++ >= 5) { |
7f37c426 KH |
711 | fw_error("failed to reconnect to %s\n", |
712 | unit->device.bus_id); | |
713 | /* Fall back and try to log in again. */ | |
714 | sd->retries = 0; | |
1da0c93b | 715 | PREPARE_DELAYED_WORK(&sd->work, sbp2_login); |
7f37c426 KH |
716 | } |
717 | schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); | |
718 | return; | |
719 | } | |
9ba136d0 KH |
720 | |
721 | sd->generation = generation; | |
722 | sd->node_id = node_id; | |
907293d7 | 723 | sd->address_high = local_node_id << 16; |
7f37c426 | 724 | |
5c5539d8 KH |
725 | fw_notify("reconnected to unit %s (%d retries)\n", |
726 | unit->device.bus_id, sd->retries); | |
7f37c426 KH |
727 | sbp2_agent_reset(unit); |
728 | sbp2_cancel_orbs(unit); | |
b3d6e151 | 729 | kref_put(&sd->kref, release_sbp2_device); |
9ba136d0 KH |
730 | } |
731 | ||
732 | static void sbp2_update(struct fw_unit *unit) | |
733 | { | |
734 | struct fw_device *device = fw_device(unit->device.parent); | |
735 | struct sbp2_device *sd = unit->device.driver_data; | |
736 | ||
7f37c426 | 737 | sd->retries = 0; |
9ba136d0 | 738 | fw_device_enable_phys_dma(device); |
b3d6e151 KH |
739 | if (schedule_delayed_work(&sd->work, 0)) |
740 | kref_get(&sd->kref); | |
9ba136d0 KH |
741 | } |
742 | ||
743 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
744 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
745 | ||
21ebcd12 | 746 | static const struct fw_device_id sbp2_id_table[] = { |
9ba136d0 KH |
747 | { |
748 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, | |
749 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, | |
5af4e5ea | 750 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
751 | }, |
752 | { } | |
753 | }; | |
754 | ||
755 | static struct fw_driver sbp2_driver = { | |
756 | .driver = { | |
757 | .owner = THIS_MODULE, | |
758 | .name = sbp2_driver_name, | |
759 | .bus = &fw_bus_type, | |
760 | .probe = sbp2_probe, | |
761 | .remove = sbp2_remove, | |
762 | }, | |
763 | .update = sbp2_update, | |
764 | .id_table = sbp2_id_table, | |
765 | }; | |
766 | ||
767 | static unsigned int sbp2_status_to_sense_data(u8 * sbp2_status, u8 * sense_data) | |
768 | { | |
769 | sense_data[0] = 0x70; | |
770 | sense_data[1] = 0x0; | |
771 | sense_data[2] = sbp2_status[1]; | |
772 | sense_data[3] = sbp2_status[4]; | |
773 | sense_data[4] = sbp2_status[5]; | |
774 | sense_data[5] = sbp2_status[6]; | |
775 | sense_data[6] = sbp2_status[7]; | |
776 | sense_data[7] = 10; | |
777 | sense_data[8] = sbp2_status[8]; | |
778 | sense_data[9] = sbp2_status[9]; | |
779 | sense_data[10] = sbp2_status[10]; | |
780 | sense_data[11] = sbp2_status[11]; | |
781 | sense_data[12] = sbp2_status[2]; | |
782 | sense_data[13] = sbp2_status[3]; | |
783 | sense_data[14] = sbp2_status[12]; | |
784 | sense_data[15] = sbp2_status[13]; | |
785 | ||
786 | switch (sbp2_status[0] & 0x3f) { | |
787 | case SAM_STAT_GOOD: | |
788 | return DID_OK; | |
789 | ||
790 | case SAM_STAT_CHECK_CONDITION: | |
791 | /* return CHECK_CONDITION << 1 | DID_OK << 16; */ | |
792 | return DID_OK; | |
793 | ||
794 | case SAM_STAT_BUSY: | |
795 | return DID_BUS_BUSY; | |
796 | ||
797 | case SAM_STAT_CONDITION_MET: | |
798 | case SAM_STAT_RESERVATION_CONFLICT: | |
799 | case SAM_STAT_COMMAND_TERMINATED: | |
800 | default: | |
801 | return DID_ERROR; | |
802 | } | |
803 | } | |
804 | ||
805 | static void | |
806 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
807 | { | |
808 | struct sbp2_command_orb *orb = (struct sbp2_command_orb *)base_orb; | |
809 | struct fw_unit *unit = orb->unit; | |
810 | struct fw_device *device = fw_device(unit->device.parent); | |
811 | struct scatterlist *sg; | |
812 | int result; | |
813 | ||
814 | if (status != NULL) { | |
815 | if (status_get_dead(*status)) { | |
816 | fw_notify("agent died, issuing agent reset\n"); | |
817 | sbp2_agent_reset(unit); | |
818 | } | |
819 | ||
820 | switch (status_get_response(*status)) { | |
821 | case SBP2_STATUS_REQUEST_COMPLETE: | |
822 | result = DID_OK; | |
823 | break; | |
824 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
825 | result = DID_BUS_BUSY; | |
826 | break; | |
827 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
828 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
829 | default: | |
830 | result = DID_ERROR; | |
831 | break; | |
832 | } | |
833 | ||
834 | if (result == DID_OK && status_get_len(*status) > 1) | |
835 | result = sbp2_status_to_sense_data(status_get_data(*status), | |
836 | orb->cmd->sense_buffer); | |
837 | } else { | |
838 | /* If the orb completes with status == NULL, something | |
839 | * went wrong, typically a bus reset happened mid-orb | |
840 | * or when sending the write (less likely). */ | |
374a0039 | 841 | result = DID_BUS_BUSY; |
9ba136d0 KH |
842 | } |
843 | ||
844 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
845 | sizeof orb->request, DMA_TO_DEVICE); | |
846 | ||
847 | if (orb->cmd->use_sg > 0) { | |
848 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
849 | dma_unmap_sg(device->card->device, sg, orb->cmd->use_sg, | |
850 | orb->cmd->sc_data_direction); | |
851 | } | |
852 | ||
853 | if (orb->page_table_bus != 0) | |
854 | dma_unmap_single(device->card->device, orb->page_table_bus, | |
855 | sizeof orb->page_table_bus, DMA_TO_DEVICE); | |
856 | ||
857 | if (orb->request_buffer_bus != 0) | |
858 | dma_unmap_single(device->card->device, orb->request_buffer_bus, | |
859 | sizeof orb->request_buffer_bus, | |
860 | DMA_FROM_DEVICE); | |
861 | ||
862 | orb->cmd->result = result << 16; | |
863 | orb->done(orb->cmd); | |
864 | ||
865 | kfree(orb); | |
866 | } | |
867 | ||
868 | static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) | |
869 | { | |
870 | struct fw_unit *unit = | |
871 | (struct fw_unit *)orb->cmd->device->host->hostdata[0]; | |
872 | struct fw_device *device = fw_device(unit->device.parent); | |
873 | struct sbp2_device *sd = unit->device.driver_data; | |
874 | struct scatterlist *sg; | |
875 | int sg_len, l, i, j, count; | |
876 | size_t size; | |
877 | dma_addr_t sg_addr; | |
878 | ||
879 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
880 | count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg, | |
881 | orb->cmd->sc_data_direction); | |
882 | ||
883 | /* Handle the special case where there is only one element in | |
884 | * the scatter list by converting it to an immediate block | |
885 | * request. This is also a workaround for broken devices such | |
886 | * as the second generation iPod which doesn't support page | |
887 | * tables. */ | |
888 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { | |
889 | orb->request.data_descriptor.high = sd->address_high; | |
890 | orb->request.data_descriptor.low = sg_dma_address(sg); | |
891 | orb->request.misc |= | |
892 | command_orb_data_size(sg_dma_len(sg)); | |
893 | return; | |
894 | } | |
895 | ||
896 | /* Convert the scatterlist to an sbp2 page table. If any | |
897 | * scatterlist entries are too big for sbp2 we split the as we go. */ | |
898 | for (i = 0, j = 0; i < count; i++) { | |
899 | sg_len = sg_dma_len(sg + i); | |
900 | sg_addr = sg_dma_address(sg + i); | |
901 | while (sg_len) { | |
902 | l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH); | |
903 | orb->page_table[j].low = sg_addr; | |
904 | orb->page_table[j].high = (l << 16); | |
905 | sg_addr += l; | |
906 | sg_len -= l; | |
907 | j++; | |
908 | } | |
909 | } | |
910 | ||
911 | size = sizeof orb->page_table[0] * j; | |
912 | ||
913 | /* The data_descriptor pointer is the one case where we need | |
914 | * to fill in the node ID part of the address. All other | |
915 | * pointers assume that the data referenced reside on the | |
916 | * initiator (i.e. us), but data_descriptor can refer to data | |
917 | * on other nodes so we need to put our ID in descriptor.high. */ | |
918 | ||
919 | orb->page_table_bus = | |
920 | dma_map_single(device->card->device, orb->page_table, | |
921 | size, DMA_TO_DEVICE); | |
922 | orb->request.data_descriptor.high = sd->address_high; | |
923 | orb->request.data_descriptor.low = orb->page_table_bus; | |
924 | orb->request.misc |= | |
925 | command_orb_page_table_present | | |
926 | command_orb_data_size(j); | |
927 | ||
928 | fw_memcpy_to_be32(orb->page_table, orb->page_table, size); | |
929 | } | |
930 | ||
931 | static void sbp2_command_orb_map_buffer(struct sbp2_command_orb *orb) | |
932 | { | |
933 | struct fw_unit *unit = | |
934 | (struct fw_unit *)orb->cmd->device->host->hostdata[0]; | |
935 | struct fw_device *device = fw_device(unit->device.parent); | |
936 | struct sbp2_device *sd = unit->device.driver_data; | |
937 | ||
938 | /* As for map_scatterlist, we need to fill in the high bits of | |
939 | * the data_descriptor pointer. */ | |
940 | ||
941 | orb->request_buffer_bus = | |
942 | dma_map_single(device->card->device, | |
943 | orb->cmd->request_buffer, | |
944 | orb->cmd->request_bufflen, | |
945 | orb->cmd->sc_data_direction); | |
946 | orb->request.data_descriptor.high = sd->address_high; | |
947 | orb->request.data_descriptor.low = orb->request_buffer_bus; | |
948 | orb->request.misc |= | |
949 | command_orb_data_size(orb->cmd->request_bufflen); | |
950 | } | |
951 | ||
952 | /* SCSI stack integration */ | |
953 | ||
954 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |
955 | { | |
956 | struct fw_unit *unit = (struct fw_unit *)cmd->device->host->hostdata[0]; | |
957 | struct fw_device *device = fw_device(unit->device.parent); | |
958 | struct sbp2_device *sd = unit->device.driver_data; | |
959 | struct sbp2_command_orb *orb; | |
960 | ||
961 | /* Bidirectional commands are not yet implemented, and unknown | |
962 | * transfer direction not handled. */ | |
963 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { | |
964 | fw_error("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | |
82eff9db | 965 | goto fail_alloc; |
9ba136d0 KH |
966 | } |
967 | ||
968 | orb = kzalloc(sizeof *orb, GFP_ATOMIC); | |
969 | if (orb == NULL) { | |
970 | fw_notify("failed to alloc orb\n"); | |
82eff9db | 971 | goto fail_alloc; |
9ba136d0 KH |
972 | } |
973 | ||
974 | orb->base.request_bus = | |
975 | dma_map_single(device->card->device, &orb->request, | |
976 | sizeof orb->request, DMA_TO_DEVICE); | |
82eff9db KH |
977 | if (dma_mapping_error(orb->base.request_bus)) |
978 | goto fail_mapping; | |
9ba136d0 KH |
979 | |
980 | orb->unit = unit; | |
981 | orb->done = done; | |
982 | orb->cmd = cmd; | |
983 | ||
984 | orb->request.next.high = SBP2_ORB_NULL; | |
985 | orb->request.next.low = 0x0; | |
986 | /* At speed 100 we can do 512 bytes per packet, at speed 200, | |
987 | * 1024 bytes per packet etc. The SBP-2 max_payload field | |
988 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
989 | * if we set this to max_speed + 7, we get the right value. */ | |
990 | orb->request.misc = | |
991 | command_orb_max_payload(device->node->max_speed + 7) | | |
992 | command_orb_speed(device->node->max_speed) | | |
993 | command_orb_notify; | |
994 | ||
995 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
996 | orb->request.misc |= | |
997 | command_orb_direction(SBP2_DIRECTION_FROM_MEDIA); | |
998 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
999 | orb->request.misc |= | |
1000 | command_orb_direction(SBP2_DIRECTION_TO_MEDIA); | |
1001 | ||
1002 | if (cmd->use_sg) { | |
1003 | sbp2_command_orb_map_scatterlist(orb); | |
1004 | } else if (cmd->request_bufflen > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1005 | /* FIXME: Need to split this into a sg list... but | |
1006 | * could we get the scsi or blk layer to do that by | |
1007 | * reporting our max supported block size? */ | |
1008 | fw_error("command > 64k\n"); | |
82eff9db | 1009 | goto fail_bufflen; |
9ba136d0 KH |
1010 | } else if (cmd->request_bufflen > 0) { |
1011 | sbp2_command_orb_map_buffer(orb); | |
1012 | } | |
1013 | ||
1014 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request); | |
1015 | ||
1016 | memset(orb->request.command_block, | |
1017 | 0, sizeof orb->request.command_block); | |
1018 | memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); | |
1019 | ||
1020 | orb->base.callback = complete_command_orb; | |
1021 | ||
1022 | sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation, | |
1023 | sd->command_block_agent_address + SBP2_ORB_POINTER); | |
1024 | ||
1025 | return 0; | |
82eff9db KH |
1026 | |
1027 | fail_bufflen: | |
1028 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
1029 | sizeof orb->request, DMA_TO_DEVICE); | |
1030 | fail_mapping: | |
1031 | kfree(orb); | |
1032 | fail_alloc: | |
1033 | cmd->result = DID_ERROR << 16; | |
1034 | done(cmd); | |
1035 | return 0; | |
9ba136d0 KH |
1036 | } |
1037 | ||
cfb01381 SR |
1038 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1039 | { | |
1040 | struct fw_unit *unit = (struct fw_unit *)sdev->host->hostdata[0]; | |
1041 | struct sbp2_device *sd = unit->device.driver_data; | |
1042 | ||
1043 | sdev->allow_restart = 1; | |
1044 | ||
1045 | if (sd->workarounds & SBP2_WORKAROUND_INQUIRY_36) | |
1046 | sdev->inquiry_len = 36; | |
1047 | return 0; | |
1048 | } | |
1049 | ||
9ba136d0 KH |
1050 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1051 | { | |
1052 | struct fw_unit *unit = (struct fw_unit *)sdev->host->hostdata[0]; | |
1053 | struct sbp2_device *sd = unit->device.driver_data; | |
1054 | ||
cfb01381 SR |
1055 | sdev->use_10_for_rw = 1; |
1056 | ||
1057 | if (sdev->type == TYPE_ROM) | |
1058 | sdev->use_10_for_ms = 1; | |
9ba136d0 KH |
1059 | if (sdev->type == TYPE_DISK && |
1060 | sd->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
1061 | sdev->skip_ms_page_8 = 1; | |
1062 | if (sd->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) { | |
1063 | fw_notify("setting fix_capacity for %s\n", unit->device.bus_id); | |
1064 | sdev->fix_capacity = 1; | |
1065 | } | |
1066 | ||
1067 | return 0; | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * Called by scsi stack when something has really gone wrong. Usually | |
1072 | * called when a command has timed-out for some reason. | |
1073 | */ | |
1074 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1075 | { | |
1076 | struct fw_unit *unit = (struct fw_unit *)cmd->device->host->hostdata[0]; | |
1077 | ||
1078 | fw_notify("sbp2_scsi_abort\n"); | |
1079 | ||
1080 | sbp2_cancel_orbs(unit); | |
1081 | ||
1082 | return SUCCESS; | |
1083 | } | |
1084 | ||
1085 | static struct scsi_host_template scsi_driver_template = { | |
1086 | .module = THIS_MODULE, | |
1087 | .name = "SBP-2 IEEE-1394", | |
1088 | .proc_name = (char *)sbp2_driver_name, | |
1089 | .queuecommand = sbp2_scsi_queuecommand, | |
cfb01381 | 1090 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1091 | .slave_configure = sbp2_scsi_slave_configure, |
1092 | .eh_abort_handler = sbp2_scsi_abort, | |
1093 | .this_id = -1, | |
1094 | .sg_tablesize = SG_ALL, | |
1095 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1096 | .cmd_per_lun = 1, |
1097 | .can_queue = 1, | |
9ba136d0 KH |
1098 | }; |
1099 | ||
1100 | static int add_scsi_devices(struct fw_unit *unit) | |
1101 | { | |
1102 | struct sbp2_device *sd = unit->device.driver_data; | |
1103 | int retval, lun; | |
1104 | ||
7f37c426 KH |
1105 | if (sd->scsi_host != NULL) |
1106 | return 0; | |
1107 | ||
9ba136d0 KH |
1108 | sd->scsi_host = scsi_host_alloc(&scsi_driver_template, |
1109 | sizeof(unsigned long)); | |
1110 | if (sd->scsi_host == NULL) { | |
1111 | fw_error("failed to register scsi host\n"); | |
1112 | return -1; | |
1113 | } | |
1114 | ||
1115 | sd->scsi_host->hostdata[0] = (unsigned long)unit; | |
1116 | retval = scsi_add_host(sd->scsi_host, &unit->device); | |
1117 | if (retval < 0) { | |
1118 | fw_error("failed to add scsi host\n"); | |
1119 | scsi_host_put(sd->scsi_host); | |
693b9021 | 1120 | sd->scsi_host = NULL; |
9ba136d0 KH |
1121 | return retval; |
1122 | } | |
1123 | ||
1124 | /* FIXME: Loop over luns here. */ | |
1125 | lun = 0; | |
1126 | retval = scsi_add_device(sd->scsi_host, 0, 0, lun); | |
1127 | if (retval < 0) { | |
1128 | fw_error("failed to add scsi device\n"); | |
1129 | scsi_remove_host(sd->scsi_host); | |
1130 | scsi_host_put(sd->scsi_host); | |
693b9021 | 1131 | sd->scsi_host = NULL; |
9ba136d0 KH |
1132 | return retval; |
1133 | } | |
1134 | ||
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | static void remove_scsi_devices(struct fw_unit *unit) | |
1139 | { | |
1140 | struct sbp2_device *sd = unit->device.driver_data; | |
1141 | ||
7f37c426 KH |
1142 | if (sd->scsi_host != NULL) { |
1143 | scsi_remove_host(sd->scsi_host); | |
1144 | scsi_host_put(sd->scsi_host); | |
1145 | } | |
1146 | sd->scsi_host = NULL; | |
9ba136d0 KH |
1147 | } |
1148 | ||
1149 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); | |
1150 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1151 | MODULE_LICENSE("GPL"); | |
1152 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1153 | ||
1154 | static int __init sbp2_init(void) | |
1155 | { | |
1156 | return driver_register(&sbp2_driver.driver); | |
1157 | } | |
1158 | ||
1159 | static void __exit sbp2_cleanup(void) | |
1160 | { | |
1161 | driver_unregister(&sbp2_driver.driver); | |
1162 | } | |
1163 | ||
1164 | module_init(sbp2_init); | |
1165 | module_exit(sbp2_cleanup); |