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9ba136d0 KH |
1 | /* -*- c-basic-offset: 8 -*- |
2 | * fw-sbp2.c -- SBP2 driver (SCSI over IEEE1394) | |
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 { | |
54 | struct fw_unit *unit; | |
55 | struct fw_address_handler address_handler; | |
56 | struct list_head orb_list; | |
57 | u64 management_agent_address; | |
58 | u64 command_block_agent_address; | |
59 | u32 workarounds; | |
60 | int login_id; | |
61 | ||
62 | /* We cache these addresses and only update them once we've | |
63 | * logged in or reconnected to the sbp2 device. That way, any | |
64 | * IO to the device will automatically fail and get retried if | |
65 | * it happens in a window where the device is not ready to | |
66 | * handle it (e.g. after a bus reset but before we reconnect). */ | |
67 | int node_id; | |
68 | int address_high; | |
69 | int generation; | |
70 | ||
1d3d52c5 KH |
71 | /* Timer for flushing ORBs. */ |
72 | struct timer_list orb_timer; | |
73 | ||
7f37c426 KH |
74 | int retries; |
75 | struct delayed_work work; | |
9ba136d0 KH |
76 | struct Scsi_Host *scsi_host; |
77 | }; | |
78 | ||
79 | #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 | |
80 | #define SBP2_MAX_SECTORS 255 /* Max sectors supported */ | |
1d3d52c5 | 81 | #define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */ |
9ba136d0 KH |
82 | |
83 | #define SBP2_ORB_NULL 0x80000000 | |
84 | ||
85 | #define SBP2_DIRECTION_TO_MEDIA 0x0 | |
86 | #define SBP2_DIRECTION_FROM_MEDIA 0x1 | |
87 | ||
88 | /* Unit directory keys */ | |
89 | #define SBP2_COMMAND_SET_SPECIFIER 0x38 | |
90 | #define SBP2_COMMAND_SET 0x39 | |
91 | #define SBP2_COMMAND_SET_REVISION 0x3b | |
92 | #define SBP2_FIRMWARE_REVISION 0x3c | |
93 | ||
94 | /* Flags for detected oddities and brokeness */ | |
95 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 | |
96 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 | |
97 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 | |
98 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 | |
99 | #define SBP2_WORKAROUND_OVERRIDE 0x100 | |
100 | ||
101 | /* Management orb opcodes */ | |
102 | #define SBP2_LOGIN_REQUEST 0x0 | |
103 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
104 | #define SBP2_RECONNECT_REQUEST 0x3 | |
105 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
106 | #define SBP2_LOGOUT_REQUEST 0x7 | |
107 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
108 | #define SBP2_ABORT_TASK_SET 0xc | |
109 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
110 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
111 | ||
112 | /* Offsets for command block agent registers */ | |
113 | #define SBP2_AGENT_STATE 0x00 | |
114 | #define SBP2_AGENT_RESET 0x04 | |
115 | #define SBP2_ORB_POINTER 0x08 | |
116 | #define SBP2_DOORBELL 0x10 | |
117 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
118 | ||
119 | /* Status write response codes */ | |
120 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
121 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
122 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
123 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
124 | ||
125 | #define status_get_orb_high(v) ((v).status & 0xffff) | |
126 | #define status_get_sbp_status(v) (((v).status >> 16) & 0xff) | |
127 | #define status_get_len(v) (((v).status >> 24) & 0x07) | |
128 | #define status_get_dead(v) (((v).status >> 27) & 0x01) | |
129 | #define status_get_response(v) (((v).status >> 28) & 0x03) | |
130 | #define status_get_source(v) (((v).status >> 30) & 0x03) | |
131 | #define status_get_orb_low(v) ((v).orb_low) | |
132 | #define status_get_data(v) ((v).data) | |
133 | ||
134 | struct sbp2_status { | |
135 | u32 status; | |
136 | u32 orb_low; | |
137 | u8 data[24]; | |
138 | }; | |
139 | ||
140 | struct sbp2_pointer { | |
141 | u32 high; | |
142 | u32 low; | |
143 | }; | |
144 | ||
145 | struct sbp2_orb { | |
146 | struct fw_transaction t; | |
147 | dma_addr_t request_bus; | |
148 | int rcode; | |
149 | struct sbp2_pointer pointer; | |
150 | void (*callback) (struct sbp2_orb * orb, struct sbp2_status * status); | |
151 | struct list_head link; | |
152 | }; | |
153 | ||
154 | #define management_orb_lun(v) ((v)) | |
155 | #define management_orb_function(v) ((v) << 16) | |
156 | #define management_orb_reconnect(v) ((v) << 20) | |
157 | #define management_orb_exclusive ((1) << 28) | |
158 | #define management_orb_request_format(v) ((v) << 29) | |
159 | #define management_orb_notify ((1) << 31) | |
160 | ||
161 | #define management_orb_response_length(v) ((v)) | |
162 | #define management_orb_password_length(v) ((v) << 16) | |
163 | ||
164 | struct sbp2_management_orb { | |
165 | struct sbp2_orb base; | |
166 | struct { | |
167 | struct sbp2_pointer password; | |
168 | struct sbp2_pointer response; | |
169 | u32 misc; | |
170 | u32 length; | |
171 | struct sbp2_pointer status_fifo; | |
172 | } request; | |
173 | __be32 response[4]; | |
174 | dma_addr_t response_bus; | |
175 | struct completion done; | |
176 | struct sbp2_status status; | |
177 | }; | |
178 | ||
179 | #define login_response_get_login_id(v) ((v).misc & 0xffff) | |
180 | #define login_response_get_length(v) (((v).misc >> 16) & 0xffff) | |
181 | ||
182 | struct sbp2_login_response { | |
183 | u32 misc; | |
184 | struct sbp2_pointer command_block_agent; | |
185 | u32 reconnect_hold; | |
186 | }; | |
187 | ||
188 | #define command_orb_data_size(v) ((v)) | |
189 | #define command_orb_page_size(v) ((v) << 16) | |
190 | #define command_orb_page_table_present ((1) << 19) | |
191 | #define command_orb_max_payload(v) ((v) << 20) | |
192 | #define command_orb_speed(v) ((v) << 24) | |
193 | #define command_orb_direction(v) ((v) << 27) | |
194 | #define command_orb_request_format(v) ((v) << 29) | |
195 | #define command_orb_notify ((1) << 31) | |
196 | ||
197 | struct sbp2_command_orb { | |
198 | struct sbp2_orb base; | |
199 | struct { | |
200 | struct sbp2_pointer next; | |
201 | struct sbp2_pointer data_descriptor; | |
202 | u32 misc; | |
203 | u8 command_block[12]; | |
204 | } request; | |
205 | struct scsi_cmnd *cmd; | |
206 | scsi_done_fn_t done; | |
207 | struct fw_unit *unit; | |
208 | ||
209 | struct sbp2_pointer page_table[SG_ALL]; | |
210 | dma_addr_t page_table_bus; | |
211 | dma_addr_t request_buffer_bus; | |
212 | }; | |
213 | ||
214 | /* | |
215 | * List of devices with known bugs. | |
216 | * | |
217 | * The firmware_revision field, masked with 0xffff00, is the best | |
218 | * indicator for the type of bridge chip of a device. It yields a few | |
219 | * false positives but this did not break correctly behaving devices | |
220 | * so far. We use ~0 as a wildcard, since the 24 bit values we get | |
221 | * from the config rom can never match that. | |
222 | */ | |
223 | static const struct { | |
224 | u32 firmware_revision; | |
225 | u32 model; | |
226 | unsigned workarounds; | |
227 | } sbp2_workarounds_table[] = { | |
228 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
229 | .firmware_revision = 0x002800, | |
230 | .model = 0x001010, | |
231 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
232 | SBP2_WORKAROUND_MODE_SENSE_8, | |
233 | }, | |
234 | /* Initio bridges, actually only needed for some older ones */ { | |
235 | .firmware_revision = 0x000200, | |
236 | .model = ~0, | |
237 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
238 | }, | |
239 | /* Symbios bridge */ { | |
240 | .firmware_revision = 0xa0b800, | |
241 | .model = ~0, | |
242 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
243 | }, | |
244 | /* There are iPods (2nd gen, 3rd gen) with model_id == 0, but | |
245 | * these iPods do not feature the read_capacity bug according | |
246 | * to one report. Read_capacity behaviour as well as model_id | |
247 | * could change due to Apple-supplied firmware updates though. */ | |
248 | /* iPod 4th generation. */ { | |
249 | .firmware_revision = 0x0a2700, | |
250 | .model = 0x000021, | |
251 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
252 | }, | |
253 | /* iPod mini */ { | |
254 | .firmware_revision = 0x0a2700, | |
255 | .model = 0x000023, | |
256 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
257 | }, | |
258 | /* iPod Photo */ { | |
259 | .firmware_revision = 0x0a2700, | |
260 | .model = 0x00007e, | |
261 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
262 | } | |
263 | }; | |
264 | ||
265 | static void | |
266 | sbp2_status_write(struct fw_card *card, struct fw_request *request, | |
267 | int tcode, int destination, int source, | |
268 | int generation, int speed, | |
269 | unsigned long long offset, | |
270 | void *payload, size_t length, void *callback_data) | |
271 | { | |
272 | struct sbp2_device *sd = callback_data; | |
273 | struct sbp2_orb *orb; | |
274 | struct sbp2_status status; | |
275 | size_t header_size; | |
276 | unsigned long flags; | |
277 | ||
278 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
279 | length == 0 || length > sizeof status) { | |
280 | fw_send_response(card, request, RCODE_TYPE_ERROR); | |
281 | return; | |
282 | } | |
283 | ||
284 | header_size = min(length, 2 * sizeof(u32)); | |
285 | fw_memcpy_from_be32(&status, payload, header_size); | |
286 | if (length > header_size) | |
287 | memcpy(status.data, payload + 8, length - header_size); | |
288 | if (status_get_source(status) == 2 || status_get_source(status) == 3) { | |
289 | fw_notify("non-orb related status write, not handled\n"); | |
290 | fw_send_response(card, request, RCODE_COMPLETE); | |
291 | return; | |
292 | } | |
293 | ||
294 | /* Lookup the orb corresponding to this status write. */ | |
295 | spin_lock_irqsave(&card->lock, flags); | |
296 | list_for_each_entry(orb, &sd->orb_list, link) { | |
297 | if (status_get_orb_high(status) == 0 && | |
298 | status_get_orb_low(status) == orb->request_bus) { | |
299 | list_del(&orb->link); | |
300 | break; | |
301 | } | |
302 | } | |
303 | spin_unlock_irqrestore(&card->lock, flags); | |
304 | ||
305 | if (&orb->link != &sd->orb_list) | |
306 | orb->callback(orb, &status); | |
307 | else | |
308 | fw_error("status write for unknown orb\n"); | |
309 | ||
310 | fw_send_response(card, request, RCODE_COMPLETE); | |
311 | } | |
312 | ||
313 | static void | |
314 | complete_transaction(struct fw_card *card, int rcode, | |
315 | void *payload, size_t length, void *data) | |
316 | { | |
317 | struct sbp2_orb *orb = data; | |
318 | unsigned long flags; | |
319 | ||
320 | orb->rcode = rcode; | |
321 | if (rcode != RCODE_COMPLETE) { | |
322 | spin_lock_irqsave(&card->lock, flags); | |
323 | list_del(&orb->link); | |
324 | spin_unlock_irqrestore(&card->lock, flags); | |
325 | orb->callback(orb, NULL); | |
326 | } | |
327 | } | |
328 | ||
329 | static void | |
330 | sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, | |
331 | int node_id, int generation, u64 offset) | |
332 | { | |
333 | struct fw_device *device = fw_device(unit->device.parent); | |
334 | struct sbp2_device *sd = unit->device.driver_data; | |
335 | unsigned long flags; | |
336 | ||
337 | orb->pointer.high = 0; | |
338 | orb->pointer.low = orb->request_bus; | |
339 | fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof orb->pointer); | |
340 | ||
341 | spin_lock_irqsave(&device->card->lock, flags); | |
342 | list_add_tail(&orb->link, &sd->orb_list); | |
343 | spin_unlock_irqrestore(&device->card->lock, flags); | |
344 | ||
1d3d52c5 KH |
345 | mod_timer(&sd->orb_timer, |
346 | jiffies + DIV_ROUND_UP(SBP2_ORB_TIMEOUT * HZ, 1000)); | |
347 | ||
9ba136d0 | 348 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
907293d7 | 349 | node_id, generation, |
9ba136d0 KH |
350 | device->node->max_speed, offset, |
351 | &orb->pointer, sizeof orb->pointer, | |
352 | complete_transaction, orb); | |
353 | } | |
354 | ||
355 | static void sbp2_cancel_orbs(struct fw_unit *unit) | |
356 | { | |
357 | struct fw_device *device = fw_device(unit->device.parent); | |
358 | struct sbp2_device *sd = unit->device.driver_data; | |
359 | struct sbp2_orb *orb, *next; | |
360 | struct list_head list; | |
361 | unsigned long flags; | |
362 | ||
363 | INIT_LIST_HEAD(&list); | |
364 | spin_lock_irqsave(&device->card->lock, flags); | |
365 | list_splice_init(&sd->orb_list, &list); | |
366 | spin_unlock_irqrestore(&device->card->lock, flags); | |
367 | ||
368 | list_for_each_entry_safe(orb, next, &list, link) { | |
730c32f5 KH |
369 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
370 | continue; | |
371 | ||
9ba136d0 KH |
372 | orb->rcode = RCODE_CANCELLED; |
373 | orb->callback(orb, NULL); | |
374 | } | |
375 | } | |
376 | ||
1d3d52c5 KH |
377 | static void orb_timer_callback(unsigned long data) |
378 | { | |
379 | struct sbp2_device *sd = (struct sbp2_device *)data; | |
380 | ||
381 | sbp2_cancel_orbs(sd->unit); | |
382 | } | |
383 | ||
9ba136d0 KH |
384 | static void |
385 | complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
386 | { | |
387 | struct sbp2_management_orb *orb = | |
388 | (struct sbp2_management_orb *)base_orb; | |
389 | ||
390 | if (status) | |
391 | memcpy(&orb->status, status, sizeof *status); | |
392 | complete(&orb->done); | |
393 | } | |
394 | ||
395 | static int | |
396 | sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, | |
397 | int function, int lun, void *response) | |
398 | { | |
399 | struct fw_device *device = fw_device(unit->device.parent); | |
400 | struct sbp2_device *sd = unit->device.driver_data; | |
401 | struct sbp2_management_orb *orb; | |
9ba136d0 KH |
402 | int retval = -ENOMEM; |
403 | ||
404 | orb = kzalloc(sizeof *orb, GFP_ATOMIC); | |
405 | if (orb == NULL) | |
406 | return -ENOMEM; | |
407 | ||
408 | /* The sbp2 device is going to send a block read request to | |
409 | * read out the request from host memory, so map it for | |
410 | * dma. */ | |
411 | orb->base.request_bus = | |
412 | dma_map_single(device->card->device, &orb->request, | |
413 | sizeof orb->request, DMA_TO_DEVICE); | |
414 | if (orb->base.request_bus == 0) | |
415 | goto out; | |
416 | ||
417 | orb->response_bus = | |
418 | dma_map_single(device->card->device, &orb->response, | |
419 | sizeof orb->response, DMA_FROM_DEVICE); | |
420 | if (orb->response_bus == 0) | |
421 | goto out; | |
422 | ||
423 | orb->request.response.high = 0; | |
424 | orb->request.response.low = orb->response_bus; | |
425 | ||
426 | orb->request.misc = | |
427 | management_orb_notify | | |
428 | management_orb_function(function) | | |
429 | management_orb_lun(lun); | |
430 | orb->request.length = | |
431 | management_orb_response_length(sizeof orb->response); | |
432 | ||
433 | orb->request.status_fifo.high = sd->address_handler.offset >> 32; | |
434 | orb->request.status_fifo.low = sd->address_handler.offset; | |
435 | ||
436 | /* FIXME: Yeah, ok this isn't elegant, we hardwire exclusive | |
437 | * login and 1 second reconnect time. The reconnect setting | |
438 | * is probably fine, but the exclusive login should be an | |
439 | * option. */ | |
440 | if (function == SBP2_LOGIN_REQUEST) { | |
441 | orb->request.misc |= | |
442 | management_orb_exclusive | | |
443 | management_orb_reconnect(0); | |
444 | } | |
445 | ||
446 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request); | |
447 | ||
448 | init_completion(&orb->done); | |
449 | orb->base.callback = complete_management_orb; | |
450 | sbp2_send_orb(&orb->base, unit, | |
451 | node_id, generation, sd->management_agent_address); | |
452 | ||
1d3d52c5 | 453 | wait_for_completion(&orb->done); |
9ba136d0 KH |
454 | |
455 | /* FIXME: Handle bus reset race here. */ | |
456 | ||
457 | retval = -EIO; | |
458 | if (orb->base.rcode != RCODE_COMPLETE) { | |
459 | fw_error("management write failed, rcode 0x%02x\n", | |
460 | orb->base.rcode); | |
461 | goto out; | |
462 | } | |
463 | ||
1d3d52c5 | 464 | if (orb->base.rcode == RCODE_CANCELLED) { |
9ba136d0 KH |
465 | fw_error("orb reply timed out, rcode=0x%02x\n", |
466 | orb->base.rcode); | |
467 | goto out; | |
468 | } | |
469 | ||
470 | if (status_get_response(orb->status) != 0 || | |
471 | status_get_sbp_status(orb->status) != 0) { | |
472 | fw_error("error status: %d:%d\n", | |
473 | status_get_response(orb->status), | |
474 | status_get_sbp_status(orb->status)); | |
475 | goto out; | |
476 | } | |
477 | ||
478 | retval = 0; | |
479 | out: | |
480 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
481 | sizeof orb->request, DMA_TO_DEVICE); | |
482 | dma_unmap_single(device->card->device, orb->response_bus, | |
483 | sizeof orb->response, DMA_FROM_DEVICE); | |
484 | ||
485 | if (response) | |
486 | fw_memcpy_from_be32(response, | |
487 | orb->response, sizeof orb->response); | |
488 | kfree(orb); | |
489 | ||
490 | return retval; | |
491 | } | |
492 | ||
493 | static void | |
494 | complete_agent_reset_write(struct fw_card *card, int rcode, | |
495 | void *payload, size_t length, void *data) | |
496 | { | |
497 | struct fw_transaction *t = data; | |
498 | ||
499 | fw_notify("agent reset write rcode=%d\n", rcode); | |
500 | kfree(t); | |
501 | } | |
502 | ||
503 | static int sbp2_agent_reset(struct fw_unit *unit) | |
504 | { | |
505 | struct fw_device *device = fw_device(unit->device.parent); | |
506 | struct sbp2_device *sd = unit->device.driver_data; | |
507 | struct fw_transaction *t; | |
508 | static u32 zero; | |
509 | ||
510 | t = kzalloc(sizeof *t, GFP_ATOMIC); | |
511 | if (t == NULL) | |
512 | return -ENOMEM; | |
513 | ||
514 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
907293d7 | 515 | sd->node_id, sd->generation, SCODE_400, |
9ba136d0 KH |
516 | sd->command_block_agent_address + SBP2_AGENT_RESET, |
517 | &zero, sizeof zero, complete_agent_reset_write, t); | |
518 | ||
519 | return 0; | |
520 | } | |
521 | ||
522 | static int add_scsi_devices(struct fw_unit *unit); | |
523 | static void remove_scsi_devices(struct fw_unit *unit); | |
7f37c426 KH |
524 | static void sbp2_reconnect(struct work_struct *work); |
525 | ||
526 | static void sbp2_login(struct work_struct *work) | |
527 | { | |
528 | struct sbp2_device *sd = | |
529 | container_of(work, struct sbp2_device, work.work); | |
530 | struct fw_unit *unit = sd->unit; | |
531 | struct fw_device *device = fw_device(unit->device.parent); | |
532 | struct sbp2_login_response response; | |
533 | int generation, node_id, local_node_id, lun, retval; | |
534 | ||
535 | /* FIXME: Make this work for multi-lun devices. */ | |
536 | lun = 0; | |
537 | ||
538 | generation = device->card->generation; | |
539 | node_id = device->node->node_id; | |
540 | local_node_id = device->card->local_node->node_id; | |
541 | ||
542 | if (sbp2_send_management_orb(unit, node_id, generation, | |
543 | SBP2_LOGIN_REQUEST, lun, &response) < 0) { | |
544 | if (sd->retries++ < 5) { | |
545 | fw_error("login attempt %d for %s failed, " | |
546 | "rescheduling\n", | |
547 | sd->retries, unit->device.bus_id); | |
548 | schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); | |
549 | } else { | |
550 | fw_error("failed to login to %s\n", | |
551 | unit->device.bus_id); | |
552 | remove_scsi_devices(unit); | |
553 | } | |
554 | return; | |
555 | } | |
556 | ||
557 | sd->generation = generation; | |
558 | sd->node_id = node_id; | |
559 | sd->address_high = local_node_id << 16; | |
560 | ||
561 | /* Get command block agent offset and login id. */ | |
562 | sd->command_block_agent_address = | |
563 | ((u64) response.command_block_agent.high << 32) | | |
564 | response.command_block_agent.low; | |
565 | sd->login_id = login_response_get_login_id(response); | |
566 | ||
567 | fw_notify("logged in to sbp2 unit %s\n", unit->device.bus_id); | |
568 | fw_notify(" - management_agent_address: 0x%012llx\n", | |
569 | (unsigned long long) sd->management_agent_address); | |
570 | fw_notify(" - command_block_agent_address: 0x%012llx\n", | |
571 | (unsigned long long) sd->command_block_agent_address); | |
572 | fw_notify(" - status write address: 0x%012llx\n", | |
573 | (unsigned long long) sd->address_handler.offset); | |
574 | ||
575 | #if 0 | |
576 | /* FIXME: The linux1394 sbp2 does this last step. */ | |
577 | sbp2_set_busy_timeout(scsi_id); | |
578 | #endif | |
579 | ||
580 | INIT_DELAYED_WORK(&sd->work, sbp2_reconnect); | |
581 | sbp2_agent_reset(unit); | |
582 | ||
583 | retval = add_scsi_devices(unit); | |
584 | if (retval < 0) { | |
585 | sbp2_send_management_orb(unit, sd->node_id, sd->generation, | |
586 | SBP2_LOGOUT_REQUEST, sd->login_id, | |
587 | NULL); | |
588 | /* Set this back to sbp2_login so we fall back and | |
589 | * retry login on bus reset. */ | |
590 | INIT_DELAYED_WORK(&sd->work, sbp2_login); | |
591 | } | |
592 | } | |
9ba136d0 KH |
593 | |
594 | static int sbp2_probe(struct device *dev) | |
595 | { | |
596 | struct fw_unit *unit = fw_unit(dev); | |
597 | struct fw_device *device = fw_device(unit->device.parent); | |
598 | struct sbp2_device *sd; | |
599 | struct fw_csr_iterator ci; | |
7f37c426 | 600 | int i, key, value; |
9ba136d0 KH |
601 | u32 model, firmware_revision; |
602 | ||
603 | sd = kzalloc(sizeof *sd, GFP_KERNEL); | |
604 | if (sd == NULL) | |
605 | return -ENOMEM; | |
606 | ||
607 | unit->device.driver_data = sd; | |
608 | sd->unit = unit; | |
609 | INIT_LIST_HEAD(&sd->orb_list); | |
1d3d52c5 | 610 | setup_timer(&sd->orb_timer, orb_timer_callback, (unsigned long)sd); |
9ba136d0 KH |
611 | |
612 | sd->address_handler.length = 0x100; | |
613 | sd->address_handler.address_callback = sbp2_status_write; | |
614 | sd->address_handler.callback_data = sd; | |
615 | ||
616 | if (fw_core_add_address_handler(&sd->address_handler, | |
617 | &fw_high_memory_region) < 0) { | |
618 | kfree(sd); | |
619 | return -EBUSY; | |
620 | } | |
621 | ||
622 | if (fw_device_enable_phys_dma(device) < 0) { | |
623 | fw_core_remove_address_handler(&sd->address_handler); | |
624 | kfree(sd); | |
625 | return -EBUSY; | |
626 | } | |
627 | ||
628 | /* Scan unit directory to get management agent address, | |
629 | * firmware revison and model. Initialize firmware_revision | |
630 | * and model to values that wont match anything in our table. */ | |
631 | firmware_revision = 0xff000000; | |
632 | model = 0xff000000; | |
633 | fw_csr_iterator_init(&ci, unit->directory); | |
634 | while (fw_csr_iterator_next(&ci, &key, &value)) { | |
635 | switch (key) { | |
636 | case CSR_DEPENDENT_INFO | CSR_OFFSET: | |
637 | sd->management_agent_address = | |
638 | 0xfffff0000000ULL + 4 * value; | |
639 | break; | |
640 | case SBP2_FIRMWARE_REVISION: | |
641 | firmware_revision = value; | |
642 | break; | |
643 | case CSR_MODEL: | |
644 | model = value; | |
645 | break; | |
646 | } | |
647 | } | |
648 | ||
649 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
650 | if (sbp2_workarounds_table[i].firmware_revision != | |
651 | (firmware_revision & 0xffffff00)) | |
652 | continue; | |
653 | if (sbp2_workarounds_table[i].model != model && | |
654 | sbp2_workarounds_table[i].model != ~0) | |
655 | continue; | |
656 | sd->workarounds |= sbp2_workarounds_table[i].workarounds; | |
657 | break; | |
658 | } | |
659 | ||
660 | if (sd->workarounds) | |
661 | fw_notify("Workarounds for node %s: 0x%x " | |
662 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", | |
663 | unit->device.bus_id, | |
664 | sd->workarounds, firmware_revision, model); | |
665 | ||
7f37c426 KH |
666 | /* We schedule work to do the login so we can easily |
667 | * reschedule retries. */ | |
668 | INIT_DELAYED_WORK(&sd->work, sbp2_login); | |
669 | schedule_delayed_work(&sd->work, 0); | |
9ba136d0 KH |
670 | |
671 | return 0; | |
672 | } | |
673 | ||
674 | static int sbp2_remove(struct device *dev) | |
675 | { | |
676 | struct fw_unit *unit = fw_unit(dev); | |
677 | struct sbp2_device *sd = unit->device.driver_data; | |
678 | ||
679 | sbp2_send_management_orb(unit, sd->node_id, sd->generation, | |
680 | SBP2_LOGOUT_REQUEST, sd->login_id, NULL); | |
681 | ||
682 | remove_scsi_devices(unit); | |
1d3d52c5 | 683 | del_timer_sync(&sd->orb_timer); |
9ba136d0 KH |
684 | |
685 | fw_core_remove_address_handler(&sd->address_handler); | |
686 | kfree(sd); | |
687 | ||
688 | fw_notify("removed sbp2 unit %s\n", dev->bus_id); | |
689 | ||
690 | return 0; | |
691 | } | |
692 | ||
693 | static void sbp2_reconnect(struct work_struct *work) | |
694 | { | |
7f37c426 KH |
695 | struct sbp2_device *sd = |
696 | container_of(work, struct sbp2_device, work.work); | |
9ba136d0 KH |
697 | struct fw_unit *unit = sd->unit; |
698 | struct fw_device *device = fw_device(unit->device.parent); | |
699 | int generation, node_id, local_node_id; | |
700 | ||
9ba136d0 KH |
701 | generation = device->card->generation; |
702 | node_id = device->node->node_id; | |
703 | local_node_id = device->card->local_node->node_id; | |
704 | ||
7f37c426 KH |
705 | if (sbp2_send_management_orb(unit, node_id, generation, |
706 | SBP2_RECONNECT_REQUEST, | |
707 | sd->login_id, NULL) < 0) { | |
708 | if (sd->retries++ < 5) { | |
709 | fw_error("reconnect attempt %d for %s failed, " | |
710 | "rescheduling\n", | |
711 | sd->retries, unit->device.bus_id); | |
712 | } else { | |
713 | fw_error("failed to reconnect to %s\n", | |
714 | unit->device.bus_id); | |
715 | /* Fall back and try to log in again. */ | |
716 | sd->retries = 0; | |
717 | INIT_DELAYED_WORK(&sd->work, sbp2_login); | |
718 | } | |
719 | schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); | |
720 | return; | |
721 | } | |
9ba136d0 KH |
722 | |
723 | sd->generation = generation; | |
724 | sd->node_id = node_id; | |
907293d7 | 725 | sd->address_high = local_node_id << 16; |
7f37c426 KH |
726 | |
727 | fw_notify("reconnected to unit %s\n", unit->device.bus_id); | |
728 | sbp2_agent_reset(unit); | |
729 | sbp2_cancel_orbs(unit); | |
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); |
7f37c426 | 739 | schedule_delayed_work(&sd->work, 0); |
9ba136d0 KH |
740 | } |
741 | ||
742 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
743 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
744 | ||
21ebcd12 | 745 | static const struct fw_device_id sbp2_id_table[] = { |
9ba136d0 KH |
746 | { |
747 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, | |
748 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, | |
5af4e5ea | 749 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
750 | }, |
751 | { } | |
752 | }; | |
753 | ||
754 | static struct fw_driver sbp2_driver = { | |
755 | .driver = { | |
756 | .owner = THIS_MODULE, | |
757 | .name = sbp2_driver_name, | |
758 | .bus = &fw_bus_type, | |
759 | .probe = sbp2_probe, | |
760 | .remove = sbp2_remove, | |
761 | }, | |
762 | .update = sbp2_update, | |
763 | .id_table = sbp2_id_table, | |
764 | }; | |
765 | ||
766 | static unsigned int sbp2_status_to_sense_data(u8 * sbp2_status, u8 * sense_data) | |
767 | { | |
768 | sense_data[0] = 0x70; | |
769 | sense_data[1] = 0x0; | |
770 | sense_data[2] = sbp2_status[1]; | |
771 | sense_data[3] = sbp2_status[4]; | |
772 | sense_data[4] = sbp2_status[5]; | |
773 | sense_data[5] = sbp2_status[6]; | |
774 | sense_data[6] = sbp2_status[7]; | |
775 | sense_data[7] = 10; | |
776 | sense_data[8] = sbp2_status[8]; | |
777 | sense_data[9] = sbp2_status[9]; | |
778 | sense_data[10] = sbp2_status[10]; | |
779 | sense_data[11] = sbp2_status[11]; | |
780 | sense_data[12] = sbp2_status[2]; | |
781 | sense_data[13] = sbp2_status[3]; | |
782 | sense_data[14] = sbp2_status[12]; | |
783 | sense_data[15] = sbp2_status[13]; | |
784 | ||
785 | switch (sbp2_status[0] & 0x3f) { | |
786 | case SAM_STAT_GOOD: | |
787 | return DID_OK; | |
788 | ||
789 | case SAM_STAT_CHECK_CONDITION: | |
790 | /* return CHECK_CONDITION << 1 | DID_OK << 16; */ | |
791 | return DID_OK; | |
792 | ||
793 | case SAM_STAT_BUSY: | |
794 | return DID_BUS_BUSY; | |
795 | ||
796 | case SAM_STAT_CONDITION_MET: | |
797 | case SAM_STAT_RESERVATION_CONFLICT: | |
798 | case SAM_STAT_COMMAND_TERMINATED: | |
799 | default: | |
800 | return DID_ERROR; | |
801 | } | |
802 | } | |
803 | ||
804 | static void | |
805 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
806 | { | |
807 | struct sbp2_command_orb *orb = (struct sbp2_command_orb *)base_orb; | |
808 | struct fw_unit *unit = orb->unit; | |
809 | struct fw_device *device = fw_device(unit->device.parent); | |
810 | struct scatterlist *sg; | |
811 | int result; | |
812 | ||
813 | if (status != NULL) { | |
814 | if (status_get_dead(*status)) { | |
815 | fw_notify("agent died, issuing agent reset\n"); | |
816 | sbp2_agent_reset(unit); | |
817 | } | |
818 | ||
819 | switch (status_get_response(*status)) { | |
820 | case SBP2_STATUS_REQUEST_COMPLETE: | |
821 | result = DID_OK; | |
822 | break; | |
823 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
824 | result = DID_BUS_BUSY; | |
825 | break; | |
826 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
827 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
828 | default: | |
829 | result = DID_ERROR; | |
830 | break; | |
831 | } | |
832 | ||
833 | if (result == DID_OK && status_get_len(*status) > 1) | |
834 | result = sbp2_status_to_sense_data(status_get_data(*status), | |
835 | orb->cmd->sense_buffer); | |
836 | } else { | |
837 | /* If the orb completes with status == NULL, something | |
838 | * went wrong, typically a bus reset happened mid-orb | |
839 | * or when sending the write (less likely). */ | |
840 | fw_notify("no command orb status, rcode=%d\n", | |
841 | orb->base.rcode); | |
374a0039 | 842 | result = DID_BUS_BUSY; |
9ba136d0 KH |
843 | } |
844 | ||
845 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
846 | sizeof orb->request, DMA_TO_DEVICE); | |
847 | ||
848 | if (orb->cmd->use_sg > 0) { | |
849 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
850 | dma_unmap_sg(device->card->device, sg, orb->cmd->use_sg, | |
851 | orb->cmd->sc_data_direction); | |
852 | } | |
853 | ||
854 | if (orb->page_table_bus != 0) | |
855 | dma_unmap_single(device->card->device, orb->page_table_bus, | |
856 | sizeof orb->page_table_bus, DMA_TO_DEVICE); | |
857 | ||
858 | if (orb->request_buffer_bus != 0) | |
859 | dma_unmap_single(device->card->device, orb->request_buffer_bus, | |
860 | sizeof orb->request_buffer_bus, | |
861 | DMA_FROM_DEVICE); | |
862 | ||
863 | orb->cmd->result = result << 16; | |
864 | orb->done(orb->cmd); | |
865 | ||
866 | kfree(orb); | |
867 | } | |
868 | ||
869 | static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) | |
870 | { | |
871 | struct fw_unit *unit = | |
872 | (struct fw_unit *)orb->cmd->device->host->hostdata[0]; | |
873 | struct fw_device *device = fw_device(unit->device.parent); | |
874 | struct sbp2_device *sd = unit->device.driver_data; | |
875 | struct scatterlist *sg; | |
876 | int sg_len, l, i, j, count; | |
877 | size_t size; | |
878 | dma_addr_t sg_addr; | |
879 | ||
880 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
881 | count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg, | |
882 | orb->cmd->sc_data_direction); | |
883 | ||
884 | /* Handle the special case where there is only one element in | |
885 | * the scatter list by converting it to an immediate block | |
886 | * request. This is also a workaround for broken devices such | |
887 | * as the second generation iPod which doesn't support page | |
888 | * tables. */ | |
889 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { | |
890 | orb->request.data_descriptor.high = sd->address_high; | |
891 | orb->request.data_descriptor.low = sg_dma_address(sg); | |
892 | orb->request.misc |= | |
893 | command_orb_data_size(sg_dma_len(sg)); | |
894 | return; | |
895 | } | |
896 | ||
897 | /* Convert the scatterlist to an sbp2 page table. If any | |
898 | * scatterlist entries are too big for sbp2 we split the as we go. */ | |
899 | for (i = 0, j = 0; i < count; i++) { | |
900 | sg_len = sg_dma_len(sg + i); | |
901 | sg_addr = sg_dma_address(sg + i); | |
902 | while (sg_len) { | |
903 | l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH); | |
904 | orb->page_table[j].low = sg_addr; | |
905 | orb->page_table[j].high = (l << 16); | |
906 | sg_addr += l; | |
907 | sg_len -= l; | |
908 | j++; | |
909 | } | |
910 | } | |
911 | ||
912 | size = sizeof orb->page_table[0] * j; | |
913 | ||
914 | /* The data_descriptor pointer is the one case where we need | |
915 | * to fill in the node ID part of the address. All other | |
916 | * pointers assume that the data referenced reside on the | |
917 | * initiator (i.e. us), but data_descriptor can refer to data | |
918 | * on other nodes so we need to put our ID in descriptor.high. */ | |
919 | ||
920 | orb->page_table_bus = | |
921 | dma_map_single(device->card->device, orb->page_table, | |
922 | size, DMA_TO_DEVICE); | |
923 | orb->request.data_descriptor.high = sd->address_high; | |
924 | orb->request.data_descriptor.low = orb->page_table_bus; | |
925 | orb->request.misc |= | |
926 | command_orb_page_table_present | | |
927 | command_orb_data_size(j); | |
928 | ||
929 | fw_memcpy_to_be32(orb->page_table, orb->page_table, size); | |
930 | } | |
931 | ||
932 | static void sbp2_command_orb_map_buffer(struct sbp2_command_orb *orb) | |
933 | { | |
934 | struct fw_unit *unit = | |
935 | (struct fw_unit *)orb->cmd->device->host->hostdata[0]; | |
936 | struct fw_device *device = fw_device(unit->device.parent); | |
937 | struct sbp2_device *sd = unit->device.driver_data; | |
938 | ||
939 | /* As for map_scatterlist, we need to fill in the high bits of | |
940 | * the data_descriptor pointer. */ | |
941 | ||
942 | orb->request_buffer_bus = | |
943 | dma_map_single(device->card->device, | |
944 | orb->cmd->request_buffer, | |
945 | orb->cmd->request_bufflen, | |
946 | orb->cmd->sc_data_direction); | |
947 | orb->request.data_descriptor.high = sd->address_high; | |
948 | orb->request.data_descriptor.low = orb->request_buffer_bus; | |
949 | orb->request.misc |= | |
950 | command_orb_data_size(orb->cmd->request_bufflen); | |
951 | } | |
952 | ||
953 | /* SCSI stack integration */ | |
954 | ||
955 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |
956 | { | |
957 | struct fw_unit *unit = (struct fw_unit *)cmd->device->host->hostdata[0]; | |
958 | struct fw_device *device = fw_device(unit->device.parent); | |
959 | struct sbp2_device *sd = unit->device.driver_data; | |
960 | struct sbp2_command_orb *orb; | |
961 | ||
962 | /* Bidirectional commands are not yet implemented, and unknown | |
963 | * transfer direction not handled. */ | |
964 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { | |
965 | fw_error("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | |
966 | cmd->result = DID_ERROR << 16; | |
967 | done(cmd); | |
968 | return 0; | |
969 | } | |
970 | ||
971 | orb = kzalloc(sizeof *orb, GFP_ATOMIC); | |
972 | if (orb == NULL) { | |
973 | fw_notify("failed to alloc orb\n"); | |
974 | cmd->result = DID_NO_CONNECT << 16; | |
975 | done(cmd); | |
976 | return 0; | |
977 | } | |
978 | ||
979 | orb->base.request_bus = | |
980 | dma_map_single(device->card->device, &orb->request, | |
981 | sizeof orb->request, DMA_TO_DEVICE); | |
982 | ||
983 | orb->unit = unit; | |
984 | orb->done = done; | |
985 | orb->cmd = cmd; | |
986 | ||
987 | orb->request.next.high = SBP2_ORB_NULL; | |
988 | orb->request.next.low = 0x0; | |
989 | /* At speed 100 we can do 512 bytes per packet, at speed 200, | |
990 | * 1024 bytes per packet etc. The SBP-2 max_payload field | |
991 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
992 | * if we set this to max_speed + 7, we get the right value. */ | |
993 | orb->request.misc = | |
994 | command_orb_max_payload(device->node->max_speed + 7) | | |
995 | command_orb_speed(device->node->max_speed) | | |
996 | command_orb_notify; | |
997 | ||
998 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
999 | orb->request.misc |= | |
1000 | command_orb_direction(SBP2_DIRECTION_FROM_MEDIA); | |
1001 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
1002 | orb->request.misc |= | |
1003 | command_orb_direction(SBP2_DIRECTION_TO_MEDIA); | |
1004 | ||
1005 | if (cmd->use_sg) { | |
1006 | sbp2_command_orb_map_scatterlist(orb); | |
1007 | } else if (cmd->request_bufflen > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1008 | /* FIXME: Need to split this into a sg list... but | |
1009 | * could we get the scsi or blk layer to do that by | |
1010 | * reporting our max supported block size? */ | |
1011 | fw_error("command > 64k\n"); | |
1012 | cmd->result = DID_ERROR << 16; | |
1013 | done(cmd); | |
1014 | return 0; | |
1015 | } else if (cmd->request_bufflen > 0) { | |
1016 | sbp2_command_orb_map_buffer(orb); | |
1017 | } | |
1018 | ||
1019 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request); | |
1020 | ||
1021 | memset(orb->request.command_block, | |
1022 | 0, sizeof orb->request.command_block); | |
1023 | memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); | |
1024 | ||
1025 | orb->base.callback = complete_command_orb; | |
1026 | ||
1027 | sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation, | |
1028 | sd->command_block_agent_address + SBP2_ORB_POINTER); | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
cfb01381 SR |
1033 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1034 | { | |
1035 | struct fw_unit *unit = (struct fw_unit *)sdev->host->hostdata[0]; | |
1036 | struct sbp2_device *sd = unit->device.driver_data; | |
1037 | ||
1038 | sdev->allow_restart = 1; | |
1039 | ||
1040 | if (sd->workarounds & SBP2_WORKAROUND_INQUIRY_36) | |
1041 | sdev->inquiry_len = 36; | |
1042 | return 0; | |
1043 | } | |
1044 | ||
9ba136d0 KH |
1045 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1046 | { | |
1047 | struct fw_unit *unit = (struct fw_unit *)sdev->host->hostdata[0]; | |
1048 | struct sbp2_device *sd = unit->device.driver_data; | |
1049 | ||
cfb01381 SR |
1050 | sdev->use_10_for_rw = 1; |
1051 | ||
1052 | if (sdev->type == TYPE_ROM) | |
1053 | sdev->use_10_for_ms = 1; | |
9ba136d0 KH |
1054 | if (sdev->type == TYPE_DISK && |
1055 | sd->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
1056 | sdev->skip_ms_page_8 = 1; | |
1057 | if (sd->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) { | |
1058 | fw_notify("setting fix_capacity for %s\n", unit->device.bus_id); | |
1059 | sdev->fix_capacity = 1; | |
1060 | } | |
1061 | ||
1062 | return 0; | |
1063 | } | |
1064 | ||
1065 | /* | |
1066 | * Called by scsi stack when something has really gone wrong. Usually | |
1067 | * called when a command has timed-out for some reason. | |
1068 | */ | |
1069 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1070 | { | |
1071 | struct fw_unit *unit = (struct fw_unit *)cmd->device->host->hostdata[0]; | |
1072 | ||
1073 | fw_notify("sbp2_scsi_abort\n"); | |
1074 | ||
1075 | sbp2_cancel_orbs(unit); | |
1076 | ||
1077 | return SUCCESS; | |
1078 | } | |
1079 | ||
1080 | static struct scsi_host_template scsi_driver_template = { | |
1081 | .module = THIS_MODULE, | |
1082 | .name = "SBP-2 IEEE-1394", | |
1083 | .proc_name = (char *)sbp2_driver_name, | |
1084 | .queuecommand = sbp2_scsi_queuecommand, | |
cfb01381 | 1085 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1086 | .slave_configure = sbp2_scsi_slave_configure, |
1087 | .eh_abort_handler = sbp2_scsi_abort, | |
1088 | .this_id = -1, | |
1089 | .sg_tablesize = SG_ALL, | |
1090 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1091 | .cmd_per_lun = 1, |
1092 | .can_queue = 1, | |
9ba136d0 KH |
1093 | }; |
1094 | ||
1095 | static int add_scsi_devices(struct fw_unit *unit) | |
1096 | { | |
1097 | struct sbp2_device *sd = unit->device.driver_data; | |
1098 | int retval, lun; | |
1099 | ||
7f37c426 KH |
1100 | if (sd->scsi_host != NULL) |
1101 | return 0; | |
1102 | ||
9ba136d0 KH |
1103 | sd->scsi_host = scsi_host_alloc(&scsi_driver_template, |
1104 | sizeof(unsigned long)); | |
1105 | if (sd->scsi_host == NULL) { | |
1106 | fw_error("failed to register scsi host\n"); | |
1107 | return -1; | |
1108 | } | |
1109 | ||
1110 | sd->scsi_host->hostdata[0] = (unsigned long)unit; | |
1111 | retval = scsi_add_host(sd->scsi_host, &unit->device); | |
1112 | if (retval < 0) { | |
1113 | fw_error("failed to add scsi host\n"); | |
1114 | scsi_host_put(sd->scsi_host); | |
1115 | return retval; | |
1116 | } | |
1117 | ||
1118 | /* FIXME: Loop over luns here. */ | |
1119 | lun = 0; | |
1120 | retval = scsi_add_device(sd->scsi_host, 0, 0, lun); | |
1121 | if (retval < 0) { | |
1122 | fw_error("failed to add scsi device\n"); | |
1123 | scsi_remove_host(sd->scsi_host); | |
1124 | scsi_host_put(sd->scsi_host); | |
1125 | return retval; | |
1126 | } | |
1127 | ||
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | static void remove_scsi_devices(struct fw_unit *unit) | |
1132 | { | |
1133 | struct sbp2_device *sd = unit->device.driver_data; | |
1134 | ||
7f37c426 KH |
1135 | if (sd->scsi_host != NULL) { |
1136 | scsi_remove_host(sd->scsi_host); | |
1137 | scsi_host_put(sd->scsi_host); | |
1138 | } | |
1139 | sd->scsi_host = NULL; | |
9ba136d0 KH |
1140 | } |
1141 | ||
1142 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); | |
1143 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1144 | MODULE_LICENSE("GPL"); | |
1145 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1146 | ||
1147 | static int __init sbp2_init(void) | |
1148 | { | |
1149 | return driver_register(&sbp2_driver.driver); | |
1150 | } | |
1151 | ||
1152 | static void __exit sbp2_cleanup(void) | |
1153 | { | |
1154 | driver_unregister(&sbp2_driver.driver); | |
1155 | } | |
1156 | ||
1157 | module_init(sbp2_init); | |
1158 | module_exit(sbp2_cleanup); |