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9ba136d0 KH |
1 | /* -*- c-basic-offset: 8 -*- |
2 | * fw-sbp2.c -- SBP2 driver (SCSI over IEEE1394) | |
3 | * | |
4 | * Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net> | |
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 | ||
21 | #include <linux/kernel.h> | |
22 | #include <linux/module.h> | |
fe69ca3a | 23 | #include <linux/mod_devicetable.h> |
9ba136d0 | 24 | #include <linux/device.h> |
0b5b2903 | 25 | #include <linux/scatterlist.h> |
9ba136d0 | 26 | #include <linux/dma-mapping.h> |
1d3d52c5 | 27 | #include <linux/timer.h> |
9ba136d0 KH |
28 | |
29 | #include <scsi/scsi.h> | |
30 | #include <scsi/scsi_cmnd.h> | |
31 | #include <scsi/scsi_dbg.h> | |
32 | #include <scsi/scsi_device.h> | |
33 | #include <scsi/scsi_host.h> | |
34 | ||
35 | #include "fw-transaction.h" | |
36 | #include "fw-topology.h" | |
37 | #include "fw-device.h" | |
38 | ||
39 | /* I don't know why the SCSI stack doesn't define something like this... */ | |
40 | typedef void (*scsi_done_fn_t) (struct scsi_cmnd *); | |
41 | ||
42 | static const char sbp2_driver_name[] = "sbp2"; | |
43 | ||
44 | struct sbp2_device { | |
45 | struct fw_unit *unit; | |
46 | struct fw_address_handler address_handler; | |
47 | struct list_head orb_list; | |
48 | u64 management_agent_address; | |
49 | u64 command_block_agent_address; | |
50 | u32 workarounds; | |
51 | int login_id; | |
52 | ||
53 | /* We cache these addresses and only update them once we've | |
54 | * logged in or reconnected to the sbp2 device. That way, any | |
55 | * IO to the device will automatically fail and get retried if | |
56 | * it happens in a window where the device is not ready to | |
57 | * handle it (e.g. after a bus reset but before we reconnect). */ | |
58 | int node_id; | |
59 | int address_high; | |
60 | int generation; | |
61 | ||
1d3d52c5 KH |
62 | /* Timer for flushing ORBs. */ |
63 | struct timer_list orb_timer; | |
64 | ||
9ba136d0 KH |
65 | struct work_struct work; |
66 | struct Scsi_Host *scsi_host; | |
67 | }; | |
68 | ||
69 | #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 | |
70 | #define SBP2_MAX_SECTORS 255 /* Max sectors supported */ | |
1d3d52c5 | 71 | #define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */ |
9ba136d0 KH |
72 | |
73 | #define SBP2_ORB_NULL 0x80000000 | |
74 | ||
75 | #define SBP2_DIRECTION_TO_MEDIA 0x0 | |
76 | #define SBP2_DIRECTION_FROM_MEDIA 0x1 | |
77 | ||
78 | /* Unit directory keys */ | |
79 | #define SBP2_COMMAND_SET_SPECIFIER 0x38 | |
80 | #define SBP2_COMMAND_SET 0x39 | |
81 | #define SBP2_COMMAND_SET_REVISION 0x3b | |
82 | #define SBP2_FIRMWARE_REVISION 0x3c | |
83 | ||
84 | /* Flags for detected oddities and brokeness */ | |
85 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 | |
86 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 | |
87 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 | |
88 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 | |
89 | #define SBP2_WORKAROUND_OVERRIDE 0x100 | |
90 | ||
91 | /* Management orb opcodes */ | |
92 | #define SBP2_LOGIN_REQUEST 0x0 | |
93 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
94 | #define SBP2_RECONNECT_REQUEST 0x3 | |
95 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
96 | #define SBP2_LOGOUT_REQUEST 0x7 | |
97 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
98 | #define SBP2_ABORT_TASK_SET 0xc | |
99 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
100 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
101 | ||
102 | /* Offsets for command block agent registers */ | |
103 | #define SBP2_AGENT_STATE 0x00 | |
104 | #define SBP2_AGENT_RESET 0x04 | |
105 | #define SBP2_ORB_POINTER 0x08 | |
106 | #define SBP2_DOORBELL 0x10 | |
107 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
108 | ||
109 | /* Status write response codes */ | |
110 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
111 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
112 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
113 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
114 | ||
115 | #define status_get_orb_high(v) ((v).status & 0xffff) | |
116 | #define status_get_sbp_status(v) (((v).status >> 16) & 0xff) | |
117 | #define status_get_len(v) (((v).status >> 24) & 0x07) | |
118 | #define status_get_dead(v) (((v).status >> 27) & 0x01) | |
119 | #define status_get_response(v) (((v).status >> 28) & 0x03) | |
120 | #define status_get_source(v) (((v).status >> 30) & 0x03) | |
121 | #define status_get_orb_low(v) ((v).orb_low) | |
122 | #define status_get_data(v) ((v).data) | |
123 | ||
124 | struct sbp2_status { | |
125 | u32 status; | |
126 | u32 orb_low; | |
127 | u8 data[24]; | |
128 | }; | |
129 | ||
130 | struct sbp2_pointer { | |
131 | u32 high; | |
132 | u32 low; | |
133 | }; | |
134 | ||
135 | struct sbp2_orb { | |
136 | struct fw_transaction t; | |
137 | dma_addr_t request_bus; | |
138 | int rcode; | |
139 | struct sbp2_pointer pointer; | |
140 | void (*callback) (struct sbp2_orb * orb, struct sbp2_status * status); | |
141 | struct list_head link; | |
142 | }; | |
143 | ||
144 | #define management_orb_lun(v) ((v)) | |
145 | #define management_orb_function(v) ((v) << 16) | |
146 | #define management_orb_reconnect(v) ((v) << 20) | |
147 | #define management_orb_exclusive ((1) << 28) | |
148 | #define management_orb_request_format(v) ((v) << 29) | |
149 | #define management_orb_notify ((1) << 31) | |
150 | ||
151 | #define management_orb_response_length(v) ((v)) | |
152 | #define management_orb_password_length(v) ((v) << 16) | |
153 | ||
154 | struct sbp2_management_orb { | |
155 | struct sbp2_orb base; | |
156 | struct { | |
157 | struct sbp2_pointer password; | |
158 | struct sbp2_pointer response; | |
159 | u32 misc; | |
160 | u32 length; | |
161 | struct sbp2_pointer status_fifo; | |
162 | } request; | |
163 | __be32 response[4]; | |
164 | dma_addr_t response_bus; | |
165 | struct completion done; | |
166 | struct sbp2_status status; | |
167 | }; | |
168 | ||
169 | #define login_response_get_login_id(v) ((v).misc & 0xffff) | |
170 | #define login_response_get_length(v) (((v).misc >> 16) & 0xffff) | |
171 | ||
172 | struct sbp2_login_response { | |
173 | u32 misc; | |
174 | struct sbp2_pointer command_block_agent; | |
175 | u32 reconnect_hold; | |
176 | }; | |
177 | ||
178 | #define command_orb_data_size(v) ((v)) | |
179 | #define command_orb_page_size(v) ((v) << 16) | |
180 | #define command_orb_page_table_present ((1) << 19) | |
181 | #define command_orb_max_payload(v) ((v) << 20) | |
182 | #define command_orb_speed(v) ((v) << 24) | |
183 | #define command_orb_direction(v) ((v) << 27) | |
184 | #define command_orb_request_format(v) ((v) << 29) | |
185 | #define command_orb_notify ((1) << 31) | |
186 | ||
187 | struct sbp2_command_orb { | |
188 | struct sbp2_orb base; | |
189 | struct { | |
190 | struct sbp2_pointer next; | |
191 | struct sbp2_pointer data_descriptor; | |
192 | u32 misc; | |
193 | u8 command_block[12]; | |
194 | } request; | |
195 | struct scsi_cmnd *cmd; | |
196 | scsi_done_fn_t done; | |
197 | struct fw_unit *unit; | |
198 | ||
199 | struct sbp2_pointer page_table[SG_ALL]; | |
200 | dma_addr_t page_table_bus; | |
201 | dma_addr_t request_buffer_bus; | |
202 | }; | |
203 | ||
204 | /* | |
205 | * List of devices with known bugs. | |
206 | * | |
207 | * The firmware_revision field, masked with 0xffff00, is the best | |
208 | * indicator for the type of bridge chip of a device. It yields a few | |
209 | * false positives but this did not break correctly behaving devices | |
210 | * so far. We use ~0 as a wildcard, since the 24 bit values we get | |
211 | * from the config rom can never match that. | |
212 | */ | |
213 | static const struct { | |
214 | u32 firmware_revision; | |
215 | u32 model; | |
216 | unsigned workarounds; | |
217 | } sbp2_workarounds_table[] = { | |
218 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
219 | .firmware_revision = 0x002800, | |
220 | .model = 0x001010, | |
221 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
222 | SBP2_WORKAROUND_MODE_SENSE_8, | |
223 | }, | |
224 | /* Initio bridges, actually only needed for some older ones */ { | |
225 | .firmware_revision = 0x000200, | |
226 | .model = ~0, | |
227 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
228 | }, | |
229 | /* Symbios bridge */ { | |
230 | .firmware_revision = 0xa0b800, | |
231 | .model = ~0, | |
232 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
233 | }, | |
234 | /* There are iPods (2nd gen, 3rd gen) with model_id == 0, but | |
235 | * these iPods do not feature the read_capacity bug according | |
236 | * to one report. Read_capacity behaviour as well as model_id | |
237 | * could change due to Apple-supplied firmware updates though. */ | |
238 | /* iPod 4th generation. */ { | |
239 | .firmware_revision = 0x0a2700, | |
240 | .model = 0x000021, | |
241 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
242 | }, | |
243 | /* iPod mini */ { | |
244 | .firmware_revision = 0x0a2700, | |
245 | .model = 0x000023, | |
246 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
247 | }, | |
248 | /* iPod Photo */ { | |
249 | .firmware_revision = 0x0a2700, | |
250 | .model = 0x00007e, | |
251 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
252 | } | |
253 | }; | |
254 | ||
255 | static void | |
256 | sbp2_status_write(struct fw_card *card, struct fw_request *request, | |
257 | int tcode, int destination, int source, | |
258 | int generation, int speed, | |
259 | unsigned long long offset, | |
260 | void *payload, size_t length, void *callback_data) | |
261 | { | |
262 | struct sbp2_device *sd = callback_data; | |
263 | struct sbp2_orb *orb; | |
264 | struct sbp2_status status; | |
265 | size_t header_size; | |
266 | unsigned long flags; | |
267 | ||
268 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
269 | length == 0 || length > sizeof status) { | |
270 | fw_send_response(card, request, RCODE_TYPE_ERROR); | |
271 | return; | |
272 | } | |
273 | ||
274 | header_size = min(length, 2 * sizeof(u32)); | |
275 | fw_memcpy_from_be32(&status, payload, header_size); | |
276 | if (length > header_size) | |
277 | memcpy(status.data, payload + 8, length - header_size); | |
278 | if (status_get_source(status) == 2 || status_get_source(status) == 3) { | |
279 | fw_notify("non-orb related status write, not handled\n"); | |
280 | fw_send_response(card, request, RCODE_COMPLETE); | |
281 | return; | |
282 | } | |
283 | ||
284 | /* Lookup the orb corresponding to this status write. */ | |
285 | spin_lock_irqsave(&card->lock, flags); | |
286 | list_for_each_entry(orb, &sd->orb_list, link) { | |
287 | if (status_get_orb_high(status) == 0 && | |
288 | status_get_orb_low(status) == orb->request_bus) { | |
289 | list_del(&orb->link); | |
290 | break; | |
291 | } | |
292 | } | |
293 | spin_unlock_irqrestore(&card->lock, flags); | |
294 | ||
295 | if (&orb->link != &sd->orb_list) | |
296 | orb->callback(orb, &status); | |
297 | else | |
298 | fw_error("status write for unknown orb\n"); | |
299 | ||
300 | fw_send_response(card, request, RCODE_COMPLETE); | |
301 | } | |
302 | ||
303 | static void | |
304 | complete_transaction(struct fw_card *card, int rcode, | |
305 | void *payload, size_t length, void *data) | |
306 | { | |
307 | struct sbp2_orb *orb = data; | |
308 | unsigned long flags; | |
309 | ||
310 | orb->rcode = rcode; | |
311 | if (rcode != RCODE_COMPLETE) { | |
312 | spin_lock_irqsave(&card->lock, flags); | |
313 | list_del(&orb->link); | |
314 | spin_unlock_irqrestore(&card->lock, flags); | |
315 | orb->callback(orb, NULL); | |
316 | } | |
317 | } | |
318 | ||
319 | static void | |
320 | sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, | |
321 | int node_id, int generation, u64 offset) | |
322 | { | |
323 | struct fw_device *device = fw_device(unit->device.parent); | |
324 | struct sbp2_device *sd = unit->device.driver_data; | |
325 | unsigned long flags; | |
326 | ||
327 | orb->pointer.high = 0; | |
328 | orb->pointer.low = orb->request_bus; | |
329 | fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof orb->pointer); | |
330 | ||
331 | spin_lock_irqsave(&device->card->lock, flags); | |
332 | list_add_tail(&orb->link, &sd->orb_list); | |
333 | spin_unlock_irqrestore(&device->card->lock, flags); | |
334 | ||
1d3d52c5 KH |
335 | mod_timer(&sd->orb_timer, |
336 | jiffies + DIV_ROUND_UP(SBP2_ORB_TIMEOUT * HZ, 1000)); | |
337 | ||
9ba136d0 | 338 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
907293d7 | 339 | node_id, generation, |
9ba136d0 KH |
340 | device->node->max_speed, offset, |
341 | &orb->pointer, sizeof orb->pointer, | |
342 | complete_transaction, orb); | |
343 | } | |
344 | ||
345 | static void sbp2_cancel_orbs(struct fw_unit *unit) | |
346 | { | |
347 | struct fw_device *device = fw_device(unit->device.parent); | |
348 | struct sbp2_device *sd = unit->device.driver_data; | |
349 | struct sbp2_orb *orb, *next; | |
350 | struct list_head list; | |
351 | unsigned long flags; | |
352 | ||
353 | INIT_LIST_HEAD(&list); | |
354 | spin_lock_irqsave(&device->card->lock, flags); | |
355 | list_splice_init(&sd->orb_list, &list); | |
356 | spin_unlock_irqrestore(&device->card->lock, flags); | |
357 | ||
358 | list_for_each_entry_safe(orb, next, &list, link) { | |
730c32f5 KH |
359 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
360 | continue; | |
361 | ||
9ba136d0 KH |
362 | orb->rcode = RCODE_CANCELLED; |
363 | orb->callback(orb, NULL); | |
364 | } | |
365 | } | |
366 | ||
1d3d52c5 KH |
367 | static void orb_timer_callback(unsigned long data) |
368 | { | |
369 | struct sbp2_device *sd = (struct sbp2_device *)data; | |
370 | ||
371 | sbp2_cancel_orbs(sd->unit); | |
372 | } | |
373 | ||
9ba136d0 KH |
374 | static void |
375 | complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
376 | { | |
377 | struct sbp2_management_orb *orb = | |
378 | (struct sbp2_management_orb *)base_orb; | |
379 | ||
380 | if (status) | |
381 | memcpy(&orb->status, status, sizeof *status); | |
382 | complete(&orb->done); | |
383 | } | |
384 | ||
385 | static int | |
386 | sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, | |
387 | int function, int lun, void *response) | |
388 | { | |
389 | struct fw_device *device = fw_device(unit->device.parent); | |
390 | struct sbp2_device *sd = unit->device.driver_data; | |
391 | struct sbp2_management_orb *orb; | |
9ba136d0 KH |
392 | int retval = -ENOMEM; |
393 | ||
394 | orb = kzalloc(sizeof *orb, GFP_ATOMIC); | |
395 | if (orb == NULL) | |
396 | return -ENOMEM; | |
397 | ||
398 | /* The sbp2 device is going to send a block read request to | |
399 | * read out the request from host memory, so map it for | |
400 | * dma. */ | |
401 | orb->base.request_bus = | |
402 | dma_map_single(device->card->device, &orb->request, | |
403 | sizeof orb->request, DMA_TO_DEVICE); | |
404 | if (orb->base.request_bus == 0) | |
405 | goto out; | |
406 | ||
407 | orb->response_bus = | |
408 | dma_map_single(device->card->device, &orb->response, | |
409 | sizeof orb->response, DMA_FROM_DEVICE); | |
410 | if (orb->response_bus == 0) | |
411 | goto out; | |
412 | ||
413 | orb->request.response.high = 0; | |
414 | orb->request.response.low = orb->response_bus; | |
415 | ||
416 | orb->request.misc = | |
417 | management_orb_notify | | |
418 | management_orb_function(function) | | |
419 | management_orb_lun(lun); | |
420 | orb->request.length = | |
421 | management_orb_response_length(sizeof orb->response); | |
422 | ||
423 | orb->request.status_fifo.high = sd->address_handler.offset >> 32; | |
424 | orb->request.status_fifo.low = sd->address_handler.offset; | |
425 | ||
426 | /* FIXME: Yeah, ok this isn't elegant, we hardwire exclusive | |
427 | * login and 1 second reconnect time. The reconnect setting | |
428 | * is probably fine, but the exclusive login should be an | |
429 | * option. */ | |
430 | if (function == SBP2_LOGIN_REQUEST) { | |
431 | orb->request.misc |= | |
432 | management_orb_exclusive | | |
433 | management_orb_reconnect(0); | |
434 | } | |
435 | ||
436 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request); | |
437 | ||
438 | init_completion(&orb->done); | |
439 | orb->base.callback = complete_management_orb; | |
440 | sbp2_send_orb(&orb->base, unit, | |
441 | node_id, generation, sd->management_agent_address); | |
442 | ||
1d3d52c5 | 443 | wait_for_completion(&orb->done); |
9ba136d0 KH |
444 | |
445 | /* FIXME: Handle bus reset race here. */ | |
446 | ||
447 | retval = -EIO; | |
448 | if (orb->base.rcode != RCODE_COMPLETE) { | |
449 | fw_error("management write failed, rcode 0x%02x\n", | |
450 | orb->base.rcode); | |
451 | goto out; | |
452 | } | |
453 | ||
1d3d52c5 | 454 | if (orb->base.rcode == RCODE_CANCELLED) { |
9ba136d0 KH |
455 | fw_error("orb reply timed out, rcode=0x%02x\n", |
456 | orb->base.rcode); | |
457 | goto out; | |
458 | } | |
459 | ||
460 | if (status_get_response(orb->status) != 0 || | |
461 | status_get_sbp_status(orb->status) != 0) { | |
462 | fw_error("error status: %d:%d\n", | |
463 | status_get_response(orb->status), | |
464 | status_get_sbp_status(orb->status)); | |
465 | goto out; | |
466 | } | |
467 | ||
468 | retval = 0; | |
469 | out: | |
470 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
471 | sizeof orb->request, DMA_TO_DEVICE); | |
472 | dma_unmap_single(device->card->device, orb->response_bus, | |
473 | sizeof orb->response, DMA_FROM_DEVICE); | |
474 | ||
475 | if (response) | |
476 | fw_memcpy_from_be32(response, | |
477 | orb->response, sizeof orb->response); | |
478 | kfree(orb); | |
479 | ||
480 | return retval; | |
481 | } | |
482 | ||
483 | static void | |
484 | complete_agent_reset_write(struct fw_card *card, int rcode, | |
485 | void *payload, size_t length, void *data) | |
486 | { | |
487 | struct fw_transaction *t = data; | |
488 | ||
489 | fw_notify("agent reset write rcode=%d\n", rcode); | |
490 | kfree(t); | |
491 | } | |
492 | ||
493 | static int sbp2_agent_reset(struct fw_unit *unit) | |
494 | { | |
495 | struct fw_device *device = fw_device(unit->device.parent); | |
496 | struct sbp2_device *sd = unit->device.driver_data; | |
497 | struct fw_transaction *t; | |
498 | static u32 zero; | |
499 | ||
500 | t = kzalloc(sizeof *t, GFP_ATOMIC); | |
501 | if (t == NULL) | |
502 | return -ENOMEM; | |
503 | ||
504 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
907293d7 | 505 | sd->node_id, sd->generation, SCODE_400, |
9ba136d0 KH |
506 | sd->command_block_agent_address + SBP2_AGENT_RESET, |
507 | &zero, sizeof zero, complete_agent_reset_write, t); | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
512 | static int add_scsi_devices(struct fw_unit *unit); | |
513 | static void remove_scsi_devices(struct fw_unit *unit); | |
514 | ||
515 | static int sbp2_probe(struct device *dev) | |
516 | { | |
517 | struct fw_unit *unit = fw_unit(dev); | |
518 | struct fw_device *device = fw_device(unit->device.parent); | |
519 | struct sbp2_device *sd; | |
520 | struct fw_csr_iterator ci; | |
521 | int i, key, value, lun, retval; | |
522 | int node_id, generation, local_node_id; | |
523 | struct sbp2_login_response response; | |
524 | u32 model, firmware_revision; | |
525 | ||
526 | sd = kzalloc(sizeof *sd, GFP_KERNEL); | |
527 | if (sd == NULL) | |
528 | return -ENOMEM; | |
529 | ||
530 | unit->device.driver_data = sd; | |
531 | sd->unit = unit; | |
532 | INIT_LIST_HEAD(&sd->orb_list); | |
1d3d52c5 | 533 | setup_timer(&sd->orb_timer, orb_timer_callback, (unsigned long)sd); |
9ba136d0 KH |
534 | |
535 | sd->address_handler.length = 0x100; | |
536 | sd->address_handler.address_callback = sbp2_status_write; | |
537 | sd->address_handler.callback_data = sd; | |
538 | ||
539 | if (fw_core_add_address_handler(&sd->address_handler, | |
540 | &fw_high_memory_region) < 0) { | |
541 | kfree(sd); | |
542 | return -EBUSY; | |
543 | } | |
544 | ||
545 | if (fw_device_enable_phys_dma(device) < 0) { | |
546 | fw_core_remove_address_handler(&sd->address_handler); | |
547 | kfree(sd); | |
548 | return -EBUSY; | |
549 | } | |
550 | ||
551 | /* Scan unit directory to get management agent address, | |
552 | * firmware revison and model. Initialize firmware_revision | |
553 | * and model to values that wont match anything in our table. */ | |
554 | firmware_revision = 0xff000000; | |
555 | model = 0xff000000; | |
556 | fw_csr_iterator_init(&ci, unit->directory); | |
557 | while (fw_csr_iterator_next(&ci, &key, &value)) { | |
558 | switch (key) { | |
559 | case CSR_DEPENDENT_INFO | CSR_OFFSET: | |
560 | sd->management_agent_address = | |
561 | 0xfffff0000000ULL + 4 * value; | |
562 | break; | |
563 | case SBP2_FIRMWARE_REVISION: | |
564 | firmware_revision = value; | |
565 | break; | |
566 | case CSR_MODEL: | |
567 | model = value; | |
568 | break; | |
569 | } | |
570 | } | |
571 | ||
572 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
573 | if (sbp2_workarounds_table[i].firmware_revision != | |
574 | (firmware_revision & 0xffffff00)) | |
575 | continue; | |
576 | if (sbp2_workarounds_table[i].model != model && | |
577 | sbp2_workarounds_table[i].model != ~0) | |
578 | continue; | |
579 | sd->workarounds |= sbp2_workarounds_table[i].workarounds; | |
580 | break; | |
581 | } | |
582 | ||
583 | if (sd->workarounds) | |
584 | fw_notify("Workarounds for node %s: 0x%x " | |
585 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", | |
586 | unit->device.bus_id, | |
587 | sd->workarounds, firmware_revision, model); | |
588 | ||
589 | /* FIXME: Make this work for multi-lun devices. */ | |
590 | lun = 0; | |
591 | ||
592 | generation = device->card->generation; | |
593 | node_id = device->node->node_id; | |
594 | local_node_id = device->card->local_node->node_id; | |
595 | ||
596 | /* FIXME: We should probably do this from a keventd callback | |
597 | * and handle retries by rescheduling the work. */ | |
598 | if (sbp2_send_management_orb(unit, node_id, generation, | |
599 | SBP2_LOGIN_REQUEST, lun, &response) < 0) { | |
600 | fw_core_remove_address_handler(&sd->address_handler); | |
1d3d52c5 | 601 | del_timer_sync(&sd->orb_timer); |
9ba136d0 KH |
602 | kfree(sd); |
603 | return -EBUSY; | |
604 | } | |
605 | ||
606 | sd->generation = generation; | |
607 | sd->node_id = node_id; | |
907293d7 | 608 | sd->address_high = local_node_id << 16; |
9ba136d0 KH |
609 | |
610 | /* Get command block agent offset and login id. */ | |
611 | sd->command_block_agent_address = | |
612 | ((u64) response.command_block_agent.high << 32) | | |
613 | response.command_block_agent.low; | |
614 | sd->login_id = login_response_get_login_id(response); | |
615 | ||
616 | fw_notify("logged in to sbp2 unit %s\n", unit->device.bus_id); | |
617 | fw_notify(" - management_agent_address: 0x%012llx\n", | |
618 | (unsigned long long) sd->management_agent_address); | |
619 | fw_notify(" - command_block_agent_address: 0x%012llx\n", | |
620 | (unsigned long long) sd->command_block_agent_address); | |
621 | fw_notify(" - status write address: 0x%012llx\n", | |
622 | (unsigned long long) sd->address_handler.offset); | |
623 | ||
624 | #if 0 | |
625 | /* FIXME: The linux1394 sbp2 does this last step. */ | |
626 | sbp2_set_busy_timeout(scsi_id); | |
627 | #endif | |
628 | ||
629 | sbp2_agent_reset(unit); | |
630 | ||
631 | retval = add_scsi_devices(unit); | |
632 | if (retval < 0) { | |
633 | sbp2_send_management_orb(unit, sd->node_id, sd->generation, | |
634 | SBP2_LOGOUT_REQUEST, sd->login_id, | |
635 | NULL); | |
636 | fw_core_remove_address_handler(&sd->address_handler); | |
1d3d52c5 | 637 | del_timer_sync(&sd->orb_timer); |
9ba136d0 KH |
638 | kfree(sd); |
639 | return retval; | |
640 | } | |
641 | ||
642 | return 0; | |
643 | } | |
644 | ||
645 | static int sbp2_remove(struct device *dev) | |
646 | { | |
647 | struct fw_unit *unit = fw_unit(dev); | |
648 | struct sbp2_device *sd = unit->device.driver_data; | |
649 | ||
650 | sbp2_send_management_orb(unit, sd->node_id, sd->generation, | |
651 | SBP2_LOGOUT_REQUEST, sd->login_id, NULL); | |
652 | ||
653 | remove_scsi_devices(unit); | |
1d3d52c5 | 654 | del_timer_sync(&sd->orb_timer); |
9ba136d0 KH |
655 | |
656 | fw_core_remove_address_handler(&sd->address_handler); | |
657 | kfree(sd); | |
658 | ||
659 | fw_notify("removed sbp2 unit %s\n", dev->bus_id); | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | static void sbp2_reconnect(struct work_struct *work) | |
665 | { | |
666 | struct sbp2_device *sd = container_of(work, struct sbp2_device, work); | |
667 | struct fw_unit *unit = sd->unit; | |
668 | struct fw_device *device = fw_device(unit->device.parent); | |
669 | int generation, node_id, local_node_id; | |
670 | ||
671 | fw_notify("in sbp2_reconnect, reconnecting to unit %s\n", | |
672 | unit->device.bus_id); | |
673 | ||
674 | generation = device->card->generation; | |
675 | node_id = device->node->node_id; | |
676 | local_node_id = device->card->local_node->node_id; | |
677 | ||
678 | sbp2_send_management_orb(unit, node_id, generation, | |
679 | SBP2_RECONNECT_REQUEST, sd->login_id, NULL); | |
680 | ||
681 | /* FIXME: handle reconnect failures. */ | |
682 | ||
683 | sbp2_cancel_orbs(unit); | |
684 | ||
685 | sd->generation = generation; | |
686 | sd->node_id = node_id; | |
907293d7 | 687 | sd->address_high = local_node_id << 16; |
9ba136d0 KH |
688 | } |
689 | ||
690 | static void sbp2_update(struct fw_unit *unit) | |
691 | { | |
692 | struct fw_device *device = fw_device(unit->device.parent); | |
693 | struct sbp2_device *sd = unit->device.driver_data; | |
694 | ||
695 | fw_device_enable_phys_dma(device); | |
696 | ||
697 | INIT_WORK(&sd->work, sbp2_reconnect); | |
698 | schedule_work(&sd->work); | |
699 | } | |
700 | ||
701 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
702 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
703 | ||
21ebcd12 | 704 | static const struct fw_device_id sbp2_id_table[] = { |
9ba136d0 KH |
705 | { |
706 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, | |
707 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, | |
5af4e5ea | 708 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
709 | }, |
710 | { } | |
711 | }; | |
712 | ||
713 | static struct fw_driver sbp2_driver = { | |
714 | .driver = { | |
715 | .owner = THIS_MODULE, | |
716 | .name = sbp2_driver_name, | |
717 | .bus = &fw_bus_type, | |
718 | .probe = sbp2_probe, | |
719 | .remove = sbp2_remove, | |
720 | }, | |
721 | .update = sbp2_update, | |
722 | .id_table = sbp2_id_table, | |
723 | }; | |
724 | ||
725 | static unsigned int sbp2_status_to_sense_data(u8 * sbp2_status, u8 * sense_data) | |
726 | { | |
727 | sense_data[0] = 0x70; | |
728 | sense_data[1] = 0x0; | |
729 | sense_data[2] = sbp2_status[1]; | |
730 | sense_data[3] = sbp2_status[4]; | |
731 | sense_data[4] = sbp2_status[5]; | |
732 | sense_data[5] = sbp2_status[6]; | |
733 | sense_data[6] = sbp2_status[7]; | |
734 | sense_data[7] = 10; | |
735 | sense_data[8] = sbp2_status[8]; | |
736 | sense_data[9] = sbp2_status[9]; | |
737 | sense_data[10] = sbp2_status[10]; | |
738 | sense_data[11] = sbp2_status[11]; | |
739 | sense_data[12] = sbp2_status[2]; | |
740 | sense_data[13] = sbp2_status[3]; | |
741 | sense_data[14] = sbp2_status[12]; | |
742 | sense_data[15] = sbp2_status[13]; | |
743 | ||
744 | switch (sbp2_status[0] & 0x3f) { | |
745 | case SAM_STAT_GOOD: | |
746 | return DID_OK; | |
747 | ||
748 | case SAM_STAT_CHECK_CONDITION: | |
749 | /* return CHECK_CONDITION << 1 | DID_OK << 16; */ | |
750 | return DID_OK; | |
751 | ||
752 | case SAM_STAT_BUSY: | |
753 | return DID_BUS_BUSY; | |
754 | ||
755 | case SAM_STAT_CONDITION_MET: | |
756 | case SAM_STAT_RESERVATION_CONFLICT: | |
757 | case SAM_STAT_COMMAND_TERMINATED: | |
758 | default: | |
759 | return DID_ERROR; | |
760 | } | |
761 | } | |
762 | ||
763 | static void | |
764 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
765 | { | |
766 | struct sbp2_command_orb *orb = (struct sbp2_command_orb *)base_orb; | |
767 | struct fw_unit *unit = orb->unit; | |
768 | struct fw_device *device = fw_device(unit->device.parent); | |
769 | struct scatterlist *sg; | |
770 | int result; | |
771 | ||
772 | if (status != NULL) { | |
773 | if (status_get_dead(*status)) { | |
774 | fw_notify("agent died, issuing agent reset\n"); | |
775 | sbp2_agent_reset(unit); | |
776 | } | |
777 | ||
778 | switch (status_get_response(*status)) { | |
779 | case SBP2_STATUS_REQUEST_COMPLETE: | |
780 | result = DID_OK; | |
781 | break; | |
782 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
783 | result = DID_BUS_BUSY; | |
784 | break; | |
785 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
786 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
787 | default: | |
788 | result = DID_ERROR; | |
789 | break; | |
790 | } | |
791 | ||
792 | if (result == DID_OK && status_get_len(*status) > 1) | |
793 | result = sbp2_status_to_sense_data(status_get_data(*status), | |
794 | orb->cmd->sense_buffer); | |
795 | } else { | |
796 | /* If the orb completes with status == NULL, something | |
797 | * went wrong, typically a bus reset happened mid-orb | |
798 | * or when sending the write (less likely). */ | |
799 | fw_notify("no command orb status, rcode=%d\n", | |
800 | orb->base.rcode); | |
801 | result = DID_ERROR; | |
802 | } | |
803 | ||
804 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
805 | sizeof orb->request, DMA_TO_DEVICE); | |
806 | ||
807 | if (orb->cmd->use_sg > 0) { | |
808 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
809 | dma_unmap_sg(device->card->device, sg, orb->cmd->use_sg, | |
810 | orb->cmd->sc_data_direction); | |
811 | } | |
812 | ||
813 | if (orb->page_table_bus != 0) | |
814 | dma_unmap_single(device->card->device, orb->page_table_bus, | |
815 | sizeof orb->page_table_bus, DMA_TO_DEVICE); | |
816 | ||
817 | if (orb->request_buffer_bus != 0) | |
818 | dma_unmap_single(device->card->device, orb->request_buffer_bus, | |
819 | sizeof orb->request_buffer_bus, | |
820 | DMA_FROM_DEVICE); | |
821 | ||
822 | orb->cmd->result = result << 16; | |
823 | orb->done(orb->cmd); | |
824 | ||
825 | kfree(orb); | |
826 | } | |
827 | ||
828 | static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) | |
829 | { | |
830 | struct fw_unit *unit = | |
831 | (struct fw_unit *)orb->cmd->device->host->hostdata[0]; | |
832 | struct fw_device *device = fw_device(unit->device.parent); | |
833 | struct sbp2_device *sd = unit->device.driver_data; | |
834 | struct scatterlist *sg; | |
835 | int sg_len, l, i, j, count; | |
836 | size_t size; | |
837 | dma_addr_t sg_addr; | |
838 | ||
839 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
840 | count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg, | |
841 | orb->cmd->sc_data_direction); | |
842 | ||
843 | /* Handle the special case where there is only one element in | |
844 | * the scatter list by converting it to an immediate block | |
845 | * request. This is also a workaround for broken devices such | |
846 | * as the second generation iPod which doesn't support page | |
847 | * tables. */ | |
848 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { | |
849 | orb->request.data_descriptor.high = sd->address_high; | |
850 | orb->request.data_descriptor.low = sg_dma_address(sg); | |
851 | orb->request.misc |= | |
852 | command_orb_data_size(sg_dma_len(sg)); | |
853 | return; | |
854 | } | |
855 | ||
856 | /* Convert the scatterlist to an sbp2 page table. If any | |
857 | * scatterlist entries are too big for sbp2 we split the as we go. */ | |
858 | for (i = 0, j = 0; i < count; i++) { | |
859 | sg_len = sg_dma_len(sg + i); | |
860 | sg_addr = sg_dma_address(sg + i); | |
861 | while (sg_len) { | |
862 | l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH); | |
863 | orb->page_table[j].low = sg_addr; | |
864 | orb->page_table[j].high = (l << 16); | |
865 | sg_addr += l; | |
866 | sg_len -= l; | |
867 | j++; | |
868 | } | |
869 | } | |
870 | ||
871 | size = sizeof orb->page_table[0] * j; | |
872 | ||
873 | /* The data_descriptor pointer is the one case where we need | |
874 | * to fill in the node ID part of the address. All other | |
875 | * pointers assume that the data referenced reside on the | |
876 | * initiator (i.e. us), but data_descriptor can refer to data | |
877 | * on other nodes so we need to put our ID in descriptor.high. */ | |
878 | ||
879 | orb->page_table_bus = | |
880 | dma_map_single(device->card->device, orb->page_table, | |
881 | size, DMA_TO_DEVICE); | |
882 | orb->request.data_descriptor.high = sd->address_high; | |
883 | orb->request.data_descriptor.low = orb->page_table_bus; | |
884 | orb->request.misc |= | |
885 | command_orb_page_table_present | | |
886 | command_orb_data_size(j); | |
887 | ||
888 | fw_memcpy_to_be32(orb->page_table, orb->page_table, size); | |
889 | } | |
890 | ||
891 | static void sbp2_command_orb_map_buffer(struct sbp2_command_orb *orb) | |
892 | { | |
893 | struct fw_unit *unit = | |
894 | (struct fw_unit *)orb->cmd->device->host->hostdata[0]; | |
895 | struct fw_device *device = fw_device(unit->device.parent); | |
896 | struct sbp2_device *sd = unit->device.driver_data; | |
897 | ||
898 | /* As for map_scatterlist, we need to fill in the high bits of | |
899 | * the data_descriptor pointer. */ | |
900 | ||
901 | orb->request_buffer_bus = | |
902 | dma_map_single(device->card->device, | |
903 | orb->cmd->request_buffer, | |
904 | orb->cmd->request_bufflen, | |
905 | orb->cmd->sc_data_direction); | |
906 | orb->request.data_descriptor.high = sd->address_high; | |
907 | orb->request.data_descriptor.low = orb->request_buffer_bus; | |
908 | orb->request.misc |= | |
909 | command_orb_data_size(orb->cmd->request_bufflen); | |
910 | } | |
911 | ||
912 | /* SCSI stack integration */ | |
913 | ||
914 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |
915 | { | |
916 | struct fw_unit *unit = (struct fw_unit *)cmd->device->host->hostdata[0]; | |
917 | struct fw_device *device = fw_device(unit->device.parent); | |
918 | struct sbp2_device *sd = unit->device.driver_data; | |
919 | struct sbp2_command_orb *orb; | |
920 | ||
921 | /* Bidirectional commands are not yet implemented, and unknown | |
922 | * transfer direction not handled. */ | |
923 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { | |
924 | fw_error("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | |
925 | cmd->result = DID_ERROR << 16; | |
926 | done(cmd); | |
927 | return 0; | |
928 | } | |
929 | ||
930 | orb = kzalloc(sizeof *orb, GFP_ATOMIC); | |
931 | if (orb == NULL) { | |
932 | fw_notify("failed to alloc orb\n"); | |
933 | cmd->result = DID_NO_CONNECT << 16; | |
934 | done(cmd); | |
935 | return 0; | |
936 | } | |
937 | ||
938 | orb->base.request_bus = | |
939 | dma_map_single(device->card->device, &orb->request, | |
940 | sizeof orb->request, DMA_TO_DEVICE); | |
941 | ||
942 | orb->unit = unit; | |
943 | orb->done = done; | |
944 | orb->cmd = cmd; | |
945 | ||
946 | orb->request.next.high = SBP2_ORB_NULL; | |
947 | orb->request.next.low = 0x0; | |
948 | /* At speed 100 we can do 512 bytes per packet, at speed 200, | |
949 | * 1024 bytes per packet etc. The SBP-2 max_payload field | |
950 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
951 | * if we set this to max_speed + 7, we get the right value. */ | |
952 | orb->request.misc = | |
953 | command_orb_max_payload(device->node->max_speed + 7) | | |
954 | command_orb_speed(device->node->max_speed) | | |
955 | command_orb_notify; | |
956 | ||
957 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
958 | orb->request.misc |= | |
959 | command_orb_direction(SBP2_DIRECTION_FROM_MEDIA); | |
960 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
961 | orb->request.misc |= | |
962 | command_orb_direction(SBP2_DIRECTION_TO_MEDIA); | |
963 | ||
964 | if (cmd->use_sg) { | |
965 | sbp2_command_orb_map_scatterlist(orb); | |
966 | } else if (cmd->request_bufflen > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
967 | /* FIXME: Need to split this into a sg list... but | |
968 | * could we get the scsi or blk layer to do that by | |
969 | * reporting our max supported block size? */ | |
970 | fw_error("command > 64k\n"); | |
971 | cmd->result = DID_ERROR << 16; | |
972 | done(cmd); | |
973 | return 0; | |
974 | } else if (cmd->request_bufflen > 0) { | |
975 | sbp2_command_orb_map_buffer(orb); | |
976 | } | |
977 | ||
978 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request); | |
979 | ||
980 | memset(orb->request.command_block, | |
981 | 0, sizeof orb->request.command_block); | |
982 | memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); | |
983 | ||
984 | orb->base.callback = complete_command_orb; | |
985 | ||
986 | sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation, | |
987 | sd->command_block_agent_address + SBP2_ORB_POINTER); | |
988 | ||
989 | return 0; | |
990 | } | |
991 | ||
cfb01381 SR |
992 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
993 | { | |
994 | struct fw_unit *unit = (struct fw_unit *)sdev->host->hostdata[0]; | |
995 | struct sbp2_device *sd = unit->device.driver_data; | |
996 | ||
997 | sdev->allow_restart = 1; | |
998 | ||
999 | if (sd->workarounds & SBP2_WORKAROUND_INQUIRY_36) | |
1000 | sdev->inquiry_len = 36; | |
1001 | return 0; | |
1002 | } | |
1003 | ||
9ba136d0 KH |
1004 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1005 | { | |
1006 | struct fw_unit *unit = (struct fw_unit *)sdev->host->hostdata[0]; | |
1007 | struct sbp2_device *sd = unit->device.driver_data; | |
1008 | ||
cfb01381 SR |
1009 | sdev->use_10_for_rw = 1; |
1010 | ||
1011 | if (sdev->type == TYPE_ROM) | |
1012 | sdev->use_10_for_ms = 1; | |
9ba136d0 KH |
1013 | if (sdev->type == TYPE_DISK && |
1014 | sd->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
1015 | sdev->skip_ms_page_8 = 1; | |
1016 | if (sd->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) { | |
1017 | fw_notify("setting fix_capacity for %s\n", unit->device.bus_id); | |
1018 | sdev->fix_capacity = 1; | |
1019 | } | |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | /* | |
1025 | * Called by scsi stack when something has really gone wrong. Usually | |
1026 | * called when a command has timed-out for some reason. | |
1027 | */ | |
1028 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1029 | { | |
1030 | struct fw_unit *unit = (struct fw_unit *)cmd->device->host->hostdata[0]; | |
1031 | ||
1032 | fw_notify("sbp2_scsi_abort\n"); | |
1033 | ||
1034 | sbp2_cancel_orbs(unit); | |
1035 | ||
1036 | return SUCCESS; | |
1037 | } | |
1038 | ||
1039 | static struct scsi_host_template scsi_driver_template = { | |
1040 | .module = THIS_MODULE, | |
1041 | .name = "SBP-2 IEEE-1394", | |
1042 | .proc_name = (char *)sbp2_driver_name, | |
1043 | .queuecommand = sbp2_scsi_queuecommand, | |
cfb01381 | 1044 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1045 | .slave_configure = sbp2_scsi_slave_configure, |
1046 | .eh_abort_handler = sbp2_scsi_abort, | |
1047 | .this_id = -1, | |
1048 | .sg_tablesize = SG_ALL, | |
1049 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1050 | .cmd_per_lun = 1, |
1051 | .can_queue = 1, | |
9ba136d0 KH |
1052 | }; |
1053 | ||
1054 | static int add_scsi_devices(struct fw_unit *unit) | |
1055 | { | |
1056 | struct sbp2_device *sd = unit->device.driver_data; | |
1057 | int retval, lun; | |
1058 | ||
1059 | sd->scsi_host = scsi_host_alloc(&scsi_driver_template, | |
1060 | sizeof(unsigned long)); | |
1061 | if (sd->scsi_host == NULL) { | |
1062 | fw_error("failed to register scsi host\n"); | |
1063 | return -1; | |
1064 | } | |
1065 | ||
1066 | sd->scsi_host->hostdata[0] = (unsigned long)unit; | |
1067 | retval = scsi_add_host(sd->scsi_host, &unit->device); | |
1068 | if (retval < 0) { | |
1069 | fw_error("failed to add scsi host\n"); | |
1070 | scsi_host_put(sd->scsi_host); | |
1071 | return retval; | |
1072 | } | |
1073 | ||
1074 | /* FIXME: Loop over luns here. */ | |
1075 | lun = 0; | |
1076 | retval = scsi_add_device(sd->scsi_host, 0, 0, lun); | |
1077 | if (retval < 0) { | |
1078 | fw_error("failed to add scsi device\n"); | |
1079 | scsi_remove_host(sd->scsi_host); | |
1080 | scsi_host_put(sd->scsi_host); | |
1081 | return retval; | |
1082 | } | |
1083 | ||
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | static void remove_scsi_devices(struct fw_unit *unit) | |
1088 | { | |
1089 | struct sbp2_device *sd = unit->device.driver_data; | |
1090 | ||
1091 | scsi_remove_host(sd->scsi_host); | |
1092 | scsi_host_put(sd->scsi_host); | |
1093 | } | |
1094 | ||
1095 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); | |
1096 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1097 | MODULE_LICENSE("GPL"); | |
1098 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1099 | ||
1100 | static int __init sbp2_init(void) | |
1101 | { | |
1102 | return driver_register(&sbp2_driver.driver); | |
1103 | } | |
1104 | ||
1105 | static void __exit sbp2_cleanup(void) | |
1106 | { | |
1107 | driver_unregister(&sbp2_driver.driver); | |
1108 | } | |
1109 | ||
1110 | module_init(sbp2_init); | |
1111 | module_exit(sbp2_cleanup); |