Commit | Line | Data |
---|---|---|
c781c06d KH |
1 | /* |
2 | * SBP2 driver (SCSI over IEEE1394) | |
9ba136d0 | 3 | * |
27a15e50 | 4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
9ba136d0 KH |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
c781c06d KH |
21 | /* |
22 | * The basic structure of this driver is based on the old storage driver, | |
27a15e50 KH |
23 | * drivers/ieee1394/sbp2.c, originally written by |
24 | * James Goodwin <jamesg@filanet.com> | |
25 | * with later contributions and ongoing maintenance from | |
26 | * Ben Collins <bcollins@debian.org>, | |
27 | * Stefan Richter <stefanr@s5r6.in-berlin.de> | |
28 | * and many others. | |
29 | */ | |
30 | ||
9ba136d0 KH |
31 | #include <linux/kernel.h> |
32 | #include <linux/module.h> | |
fe69ca3a | 33 | #include <linux/mod_devicetable.h> |
9ba136d0 | 34 | #include <linux/device.h> |
0b5b2903 | 35 | #include <linux/scatterlist.h> |
9ba136d0 | 36 | #include <linux/dma-mapping.h> |
1d3d52c5 | 37 | #include <linux/timer.h> |
9ba136d0 KH |
38 | |
39 | #include <scsi/scsi.h> | |
40 | #include <scsi/scsi_cmnd.h> | |
41 | #include <scsi/scsi_dbg.h> | |
42 | #include <scsi/scsi_device.h> | |
43 | #include <scsi/scsi_host.h> | |
44 | ||
45 | #include "fw-transaction.h" | |
46 | #include "fw-topology.h" | |
47 | #include "fw-device.h" | |
48 | ||
49 | /* I don't know why the SCSI stack doesn't define something like this... */ | |
50 | typedef void (*scsi_done_fn_t) (struct scsi_cmnd *); | |
51 | ||
52 | static const char sbp2_driver_name[] = "sbp2"; | |
53 | ||
54 | struct sbp2_device { | |
b3d6e151 | 55 | struct kref kref; |
9ba136d0 KH |
56 | struct fw_unit *unit; |
57 | struct fw_address_handler address_handler; | |
58 | struct list_head orb_list; | |
59 | u64 management_agent_address; | |
60 | u64 command_block_agent_address; | |
61 | u32 workarounds; | |
62 | int login_id; | |
63 | ||
c781c06d KH |
64 | /* |
65 | * We cache these addresses and only update them once we've | |
9ba136d0 KH |
66 | * logged in or reconnected to the sbp2 device. That way, any |
67 | * IO to the device will automatically fail and get retried if | |
68 | * it happens in a window where the device is not ready to | |
c781c06d KH |
69 | * handle it (e.g. after a bus reset but before we reconnect). |
70 | */ | |
9ba136d0 KH |
71 | int node_id; |
72 | int address_high; | |
73 | int generation; | |
74 | ||
7f37c426 KH |
75 | int retries; |
76 | struct delayed_work work; | |
9ba136d0 KH |
77 | struct Scsi_Host *scsi_host; |
78 | }; | |
79 | ||
80 | #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 | |
81 | #define SBP2_MAX_SECTORS 255 /* Max sectors supported */ | |
1d3d52c5 | 82 | #define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */ |
9ba136d0 KH |
83 | |
84 | #define SBP2_ORB_NULL 0x80000000 | |
85 | ||
86 | #define SBP2_DIRECTION_TO_MEDIA 0x0 | |
87 | #define SBP2_DIRECTION_FROM_MEDIA 0x1 | |
88 | ||
89 | /* Unit directory keys */ | |
90 | #define SBP2_COMMAND_SET_SPECIFIER 0x38 | |
91 | #define SBP2_COMMAND_SET 0x39 | |
92 | #define SBP2_COMMAND_SET_REVISION 0x3b | |
93 | #define SBP2_FIRMWARE_REVISION 0x3c | |
94 | ||
95 | /* Flags for detected oddities and brokeness */ | |
96 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 | |
97 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 | |
98 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 | |
99 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 | |
100 | #define SBP2_WORKAROUND_OVERRIDE 0x100 | |
101 | ||
102 | /* Management orb opcodes */ | |
103 | #define SBP2_LOGIN_REQUEST 0x0 | |
104 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
105 | #define SBP2_RECONNECT_REQUEST 0x3 | |
106 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
107 | #define SBP2_LOGOUT_REQUEST 0x7 | |
108 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
109 | #define SBP2_ABORT_TASK_SET 0xc | |
110 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
111 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
112 | ||
113 | /* Offsets for command block agent registers */ | |
114 | #define SBP2_AGENT_STATE 0x00 | |
115 | #define SBP2_AGENT_RESET 0x04 | |
116 | #define SBP2_ORB_POINTER 0x08 | |
117 | #define SBP2_DOORBELL 0x10 | |
118 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
119 | ||
120 | /* Status write response codes */ | |
121 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
122 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
123 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
124 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
125 | ||
126 | #define status_get_orb_high(v) ((v).status & 0xffff) | |
127 | #define status_get_sbp_status(v) (((v).status >> 16) & 0xff) | |
128 | #define status_get_len(v) (((v).status >> 24) & 0x07) | |
129 | #define status_get_dead(v) (((v).status >> 27) & 0x01) | |
130 | #define status_get_response(v) (((v).status >> 28) & 0x03) | |
131 | #define status_get_source(v) (((v).status >> 30) & 0x03) | |
132 | #define status_get_orb_low(v) ((v).orb_low) | |
133 | #define status_get_data(v) ((v).data) | |
134 | ||
135 | struct sbp2_status { | |
136 | u32 status; | |
137 | u32 orb_low; | |
138 | u8 data[24]; | |
139 | }; | |
140 | ||
141 | struct sbp2_pointer { | |
142 | u32 high; | |
143 | u32 low; | |
144 | }; | |
145 | ||
146 | struct sbp2_orb { | |
147 | struct fw_transaction t; | |
148 | dma_addr_t request_bus; | |
149 | int rcode; | |
150 | struct sbp2_pointer pointer; | |
151 | void (*callback) (struct sbp2_orb * orb, struct sbp2_status * status); | |
152 | struct list_head link; | |
153 | }; | |
154 | ||
155 | #define management_orb_lun(v) ((v)) | |
156 | #define management_orb_function(v) ((v) << 16) | |
157 | #define management_orb_reconnect(v) ((v) << 20) | |
158 | #define management_orb_exclusive ((1) << 28) | |
159 | #define management_orb_request_format(v) ((v) << 29) | |
160 | #define management_orb_notify ((1) << 31) | |
161 | ||
162 | #define management_orb_response_length(v) ((v)) | |
163 | #define management_orb_password_length(v) ((v) << 16) | |
164 | ||
165 | struct sbp2_management_orb { | |
166 | struct sbp2_orb base; | |
167 | struct { | |
168 | struct sbp2_pointer password; | |
169 | struct sbp2_pointer response; | |
170 | u32 misc; | |
171 | u32 length; | |
172 | struct sbp2_pointer status_fifo; | |
173 | } request; | |
174 | __be32 response[4]; | |
175 | dma_addr_t response_bus; | |
176 | struct completion done; | |
177 | struct sbp2_status status; | |
178 | }; | |
179 | ||
180 | #define login_response_get_login_id(v) ((v).misc & 0xffff) | |
181 | #define login_response_get_length(v) (((v).misc >> 16) & 0xffff) | |
182 | ||
183 | struct sbp2_login_response { | |
184 | u32 misc; | |
185 | struct sbp2_pointer command_block_agent; | |
186 | u32 reconnect_hold; | |
187 | }; | |
188 | ||
189 | #define command_orb_data_size(v) ((v)) | |
190 | #define command_orb_page_size(v) ((v) << 16) | |
191 | #define command_orb_page_table_present ((1) << 19) | |
192 | #define command_orb_max_payload(v) ((v) << 20) | |
193 | #define command_orb_speed(v) ((v) << 24) | |
194 | #define command_orb_direction(v) ((v) << 27) | |
195 | #define command_orb_request_format(v) ((v) << 29) | |
196 | #define command_orb_notify ((1) << 31) | |
197 | ||
198 | struct sbp2_command_orb { | |
199 | struct sbp2_orb base; | |
200 | struct { | |
201 | struct sbp2_pointer next; | |
202 | struct sbp2_pointer data_descriptor; | |
203 | u32 misc; | |
204 | u8 command_block[12]; | |
205 | } request; | |
206 | struct scsi_cmnd *cmd; | |
207 | scsi_done_fn_t done; | |
208 | struct fw_unit *unit; | |
209 | ||
210 | struct sbp2_pointer page_table[SG_ALL]; | |
211 | dma_addr_t page_table_bus; | |
212 | dma_addr_t request_buffer_bus; | |
213 | }; | |
214 | ||
215 | /* | |
216 | * List of devices with known bugs. | |
217 | * | |
218 | * The firmware_revision field, masked with 0xffff00, is the best | |
219 | * indicator for the type of bridge chip of a device. It yields a few | |
220 | * false positives but this did not break correctly behaving devices | |
221 | * so far. We use ~0 as a wildcard, since the 24 bit values we get | |
222 | * from the config rom can never match that. | |
223 | */ | |
224 | static const struct { | |
225 | u32 firmware_revision; | |
226 | u32 model; | |
227 | unsigned workarounds; | |
228 | } sbp2_workarounds_table[] = { | |
229 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
230 | .firmware_revision = 0x002800, | |
231 | .model = 0x001010, | |
232 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
233 | SBP2_WORKAROUND_MODE_SENSE_8, | |
234 | }, | |
235 | /* Initio bridges, actually only needed for some older ones */ { | |
236 | .firmware_revision = 0x000200, | |
237 | .model = ~0, | |
238 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
239 | }, | |
240 | /* Symbios bridge */ { | |
241 | .firmware_revision = 0xa0b800, | |
242 | .model = ~0, | |
243 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
244 | }, | |
c781c06d KH |
245 | |
246 | /* | |
247 | * There are iPods (2nd gen, 3rd gen) with model_id == 0, but | |
9ba136d0 KH |
248 | * these iPods do not feature the read_capacity bug according |
249 | * to one report. Read_capacity behaviour as well as model_id | |
c781c06d KH |
250 | * could change due to Apple-supplied firmware updates though. |
251 | */ | |
252 | ||
9ba136d0 KH |
253 | /* iPod 4th generation. */ { |
254 | .firmware_revision = 0x0a2700, | |
255 | .model = 0x000021, | |
256 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
257 | }, | |
258 | /* iPod mini */ { | |
259 | .firmware_revision = 0x0a2700, | |
260 | .model = 0x000023, | |
261 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
262 | }, | |
263 | /* iPod Photo */ { | |
264 | .firmware_revision = 0x0a2700, | |
265 | .model = 0x00007e, | |
266 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
267 | } | |
268 | }; | |
269 | ||
270 | static void | |
271 | sbp2_status_write(struct fw_card *card, struct fw_request *request, | |
272 | int tcode, int destination, int source, | |
273 | int generation, int speed, | |
274 | unsigned long long offset, | |
275 | void *payload, size_t length, void *callback_data) | |
276 | { | |
277 | struct sbp2_device *sd = callback_data; | |
278 | struct sbp2_orb *orb; | |
279 | struct sbp2_status status; | |
280 | size_t header_size; | |
281 | unsigned long flags; | |
282 | ||
283 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
284 | length == 0 || length > sizeof status) { | |
285 | fw_send_response(card, request, RCODE_TYPE_ERROR); | |
286 | return; | |
287 | } | |
288 | ||
289 | header_size = min(length, 2 * sizeof(u32)); | |
290 | fw_memcpy_from_be32(&status, payload, header_size); | |
291 | if (length > header_size) | |
292 | memcpy(status.data, payload + 8, length - header_size); | |
293 | if (status_get_source(status) == 2 || status_get_source(status) == 3) { | |
294 | fw_notify("non-orb related status write, not handled\n"); | |
295 | fw_send_response(card, request, RCODE_COMPLETE); | |
296 | return; | |
297 | } | |
298 | ||
299 | /* Lookup the orb corresponding to this status write. */ | |
300 | spin_lock_irqsave(&card->lock, flags); | |
301 | list_for_each_entry(orb, &sd->orb_list, link) { | |
302 | if (status_get_orb_high(status) == 0 && | |
12f26aa1 KH |
303 | status_get_orb_low(status) == orb->request_bus && |
304 | orb->rcode == RCODE_COMPLETE) { | |
9ba136d0 KH |
305 | list_del(&orb->link); |
306 | break; | |
307 | } | |
308 | } | |
309 | spin_unlock_irqrestore(&card->lock, flags); | |
310 | ||
311 | if (&orb->link != &sd->orb_list) | |
312 | orb->callback(orb, &status); | |
313 | else | |
314 | fw_error("status write for unknown orb\n"); | |
315 | ||
316 | fw_send_response(card, request, RCODE_COMPLETE); | |
317 | } | |
318 | ||
319 | static void | |
320 | complete_transaction(struct fw_card *card, int rcode, | |
321 | void *payload, size_t length, void *data) | |
322 | { | |
323 | struct sbp2_orb *orb = data; | |
324 | unsigned long flags; | |
325 | ||
326 | orb->rcode = rcode; | |
327 | if (rcode != RCODE_COMPLETE) { | |
328 | spin_lock_irqsave(&card->lock, flags); | |
329 | list_del(&orb->link); | |
330 | spin_unlock_irqrestore(&card->lock, flags); | |
331 | orb->callback(orb, NULL); | |
332 | } | |
333 | } | |
334 | ||
335 | static void | |
336 | sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, | |
337 | int node_id, int generation, u64 offset) | |
338 | { | |
339 | struct fw_device *device = fw_device(unit->device.parent); | |
340 | struct sbp2_device *sd = unit->device.driver_data; | |
341 | unsigned long flags; | |
342 | ||
343 | orb->pointer.high = 0; | |
344 | orb->pointer.low = orb->request_bus; | |
345 | fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof orb->pointer); | |
346 | ||
347 | spin_lock_irqsave(&device->card->lock, flags); | |
348 | list_add_tail(&orb->link, &sd->orb_list); | |
349 | spin_unlock_irqrestore(&device->card->lock, flags); | |
350 | ||
351 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, | |
907293d7 | 352 | node_id, generation, |
9ba136d0 KH |
353 | device->node->max_speed, offset, |
354 | &orb->pointer, sizeof orb->pointer, | |
355 | complete_transaction, orb); | |
356 | } | |
357 | ||
2aaad97b | 358 | static int sbp2_cancel_orbs(struct fw_unit *unit) |
9ba136d0 KH |
359 | { |
360 | struct fw_device *device = fw_device(unit->device.parent); | |
361 | struct sbp2_device *sd = unit->device.driver_data; | |
362 | struct sbp2_orb *orb, *next; | |
363 | struct list_head list; | |
364 | unsigned long flags; | |
2aaad97b | 365 | int retval = -ENOENT; |
9ba136d0 KH |
366 | |
367 | INIT_LIST_HEAD(&list); | |
368 | spin_lock_irqsave(&device->card->lock, flags); | |
369 | list_splice_init(&sd->orb_list, &list); | |
370 | spin_unlock_irqrestore(&device->card->lock, flags); | |
371 | ||
372 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 373 | retval = 0; |
730c32f5 KH |
374 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
375 | continue; | |
376 | ||
9ba136d0 KH |
377 | orb->rcode = RCODE_CANCELLED; |
378 | orb->callback(orb, NULL); | |
379 | } | |
9ba136d0 | 380 | |
2aaad97b | 381 | return retval; |
1d3d52c5 KH |
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 | ||
c781c06d KH |
408 | /* |
409 | * The sbp2 device is going to send a block read request to | |
410 | * read out the request from host memory, so map it for dma. | |
411 | */ | |
9ba136d0 KH |
412 | orb->base.request_bus = |
413 | dma_map_single(device->card->device, &orb->request, | |
414 | sizeof orb->request, DMA_TO_DEVICE); | |
82eff9db | 415 | if (dma_mapping_error(orb->base.request_bus)) |
9ba136d0 KH |
416 | goto out; |
417 | ||
418 | orb->response_bus = | |
419 | dma_map_single(device->card->device, &orb->response, | |
420 | sizeof orb->response, DMA_FROM_DEVICE); | |
82eff9db | 421 | if (dma_mapping_error(orb->response_bus)) |
9ba136d0 KH |
422 | goto out; |
423 | ||
424 | orb->request.response.high = 0; | |
425 | orb->request.response.low = orb->response_bus; | |
426 | ||
427 | orb->request.misc = | |
428 | management_orb_notify | | |
429 | management_orb_function(function) | | |
430 | management_orb_lun(lun); | |
431 | orb->request.length = | |
432 | management_orb_response_length(sizeof orb->response); | |
433 | ||
434 | orb->request.status_fifo.high = sd->address_handler.offset >> 32; | |
435 | orb->request.status_fifo.low = sd->address_handler.offset; | |
436 | ||
c781c06d KH |
437 | /* |
438 | * FIXME: Yeah, ok this isn't elegant, we hardwire exclusive | |
9ba136d0 | 439 | * login and 1 second reconnect time. The reconnect setting |
c781c06d KH |
440 | * is probably fine, but the exclusive login should be an option. |
441 | */ | |
9ba136d0 KH |
442 | if (function == SBP2_LOGIN_REQUEST) { |
443 | orb->request.misc |= | |
444 | management_orb_exclusive | | |
445 | management_orb_reconnect(0); | |
446 | } | |
447 | ||
448 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request); | |
449 | ||
450 | init_completion(&orb->done); | |
451 | orb->base.callback = complete_management_orb; | |
2aaad97b | 452 | |
9ba136d0 KH |
453 | sbp2_send_orb(&orb->base, unit, |
454 | node_id, generation, sd->management_agent_address); | |
455 | ||
2aaad97b KH |
456 | wait_for_completion_timeout(&orb->done, |
457 | msecs_to_jiffies(SBP2_ORB_TIMEOUT)); | |
9ba136d0 | 458 | |
9ba136d0 | 459 | retval = -EIO; |
2aaad97b KH |
460 | if (sbp2_cancel_orbs(unit) == 0) { |
461 | fw_error("orb reply timed out, rcode=0x%02x\n", | |
9ba136d0 KH |
462 | orb->base.rcode); |
463 | goto out; | |
464 | } | |
465 | ||
2aaad97b KH |
466 | if (orb->base.rcode != RCODE_COMPLETE) { |
467 | fw_error("management write failed, rcode 0x%02x\n", | |
9ba136d0 KH |
468 | orb->base.rcode); |
469 | goto out; | |
470 | } | |
471 | ||
472 | if (status_get_response(orb->status) != 0 || | |
473 | status_get_sbp_status(orb->status) != 0) { | |
474 | fw_error("error status: %d:%d\n", | |
475 | status_get_response(orb->status), | |
476 | status_get_sbp_status(orb->status)); | |
477 | goto out; | |
478 | } | |
479 | ||
480 | retval = 0; | |
481 | out: | |
482 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
483 | sizeof orb->request, DMA_TO_DEVICE); | |
484 | dma_unmap_single(device->card->device, orb->response_bus, | |
485 | sizeof orb->response, DMA_FROM_DEVICE); | |
486 | ||
487 | if (response) | |
488 | fw_memcpy_from_be32(response, | |
489 | orb->response, sizeof orb->response); | |
490 | kfree(orb); | |
491 | ||
492 | return retval; | |
493 | } | |
494 | ||
495 | static void | |
496 | complete_agent_reset_write(struct fw_card *card, int rcode, | |
497 | void *payload, size_t length, void *data) | |
498 | { | |
499 | struct fw_transaction *t = data; | |
500 | ||
9ba136d0 KH |
501 | kfree(t); |
502 | } | |
503 | ||
504 | static int sbp2_agent_reset(struct fw_unit *unit) | |
505 | { | |
506 | struct fw_device *device = fw_device(unit->device.parent); | |
507 | struct sbp2_device *sd = unit->device.driver_data; | |
508 | struct fw_transaction *t; | |
509 | static u32 zero; | |
510 | ||
511 | t = kzalloc(sizeof *t, GFP_ATOMIC); | |
512 | if (t == NULL) | |
513 | return -ENOMEM; | |
514 | ||
515 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
907293d7 | 516 | sd->node_id, sd->generation, SCODE_400, |
9ba136d0 KH |
517 | sd->command_block_agent_address + SBP2_AGENT_RESET, |
518 | &zero, sizeof zero, complete_agent_reset_write, t); | |
519 | ||
520 | return 0; | |
521 | } | |
522 | ||
523 | static int add_scsi_devices(struct fw_unit *unit); | |
524 | static void remove_scsi_devices(struct fw_unit *unit); | |
7f37c426 KH |
525 | static void sbp2_reconnect(struct work_struct *work); |
526 | ||
b3d6e151 KH |
527 | static void |
528 | release_sbp2_device(struct kref *kref) | |
529 | { | |
530 | struct sbp2_device *sd = container_of(kref, struct sbp2_device, kref); | |
531 | ||
532 | sbp2_send_management_orb(sd->unit, sd->node_id, sd->generation, | |
533 | SBP2_LOGOUT_REQUEST, sd->login_id, NULL); | |
534 | ||
535 | remove_scsi_devices(sd->unit); | |
536 | ||
537 | fw_core_remove_address_handler(&sd->address_handler); | |
538 | fw_notify("removed sbp2 unit %s\n", sd->unit->device.bus_id); | |
539 | put_device(&sd->unit->device); | |
540 | kfree(sd); | |
541 | } | |
542 | ||
7f37c426 KH |
543 | static void sbp2_login(struct work_struct *work) |
544 | { | |
545 | struct sbp2_device *sd = | |
546 | container_of(work, struct sbp2_device, work.work); | |
547 | struct fw_unit *unit = sd->unit; | |
548 | struct fw_device *device = fw_device(unit->device.parent); | |
549 | struct sbp2_login_response response; | |
550 | int generation, node_id, local_node_id, lun, retval; | |
551 | ||
552 | /* FIXME: Make this work for multi-lun devices. */ | |
553 | lun = 0; | |
554 | ||
555 | generation = device->card->generation; | |
556 | node_id = device->node->node_id; | |
557 | local_node_id = device->card->local_node->node_id; | |
558 | ||
559 | if (sbp2_send_management_orb(unit, node_id, generation, | |
560 | SBP2_LOGIN_REQUEST, lun, &response) < 0) { | |
561 | if (sd->retries++ < 5) { | |
7f37c426 KH |
562 | schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); |
563 | } else { | |
564 | fw_error("failed to login to %s\n", | |
565 | unit->device.bus_id); | |
566 | remove_scsi_devices(unit); | |
b3d6e151 | 567 | kref_put(&sd->kref, release_sbp2_device); |
7f37c426 KH |
568 | } |
569 | return; | |
570 | } | |
571 | ||
572 | sd->generation = generation; | |
573 | sd->node_id = node_id; | |
574 | sd->address_high = local_node_id << 16; | |
575 | ||
576 | /* Get command block agent offset and login id. */ | |
577 | sd->command_block_agent_address = | |
5c5539d8 | 578 | ((u64) (response.command_block_agent.high & 0xffff) << 32) | |
7f37c426 KH |
579 | response.command_block_agent.low; |
580 | sd->login_id = login_response_get_login_id(response); | |
581 | ||
5c5539d8 KH |
582 | fw_notify("logged in to sbp2 unit %s (%d retries)\n", |
583 | unit->device.bus_id, sd->retries); | |
584 | fw_notify(" - management_agent_address: 0x%012llx\n", | |
7f37c426 KH |
585 | (unsigned long long) sd->management_agent_address); |
586 | fw_notify(" - command_block_agent_address: 0x%012llx\n", | |
587 | (unsigned long long) sd->command_block_agent_address); | |
5c5539d8 | 588 | fw_notify(" - status write address: 0x%012llx\n", |
7f37c426 KH |
589 | (unsigned long long) sd->address_handler.offset); |
590 | ||
591 | #if 0 | |
592 | /* FIXME: The linux1394 sbp2 does this last step. */ | |
593 | sbp2_set_busy_timeout(scsi_id); | |
594 | #endif | |
595 | ||
1da0c93b | 596 | PREPARE_DELAYED_WORK(&sd->work, sbp2_reconnect); |
7f37c426 KH |
597 | sbp2_agent_reset(unit); |
598 | ||
599 | retval = add_scsi_devices(unit); | |
600 | if (retval < 0) { | |
601 | sbp2_send_management_orb(unit, sd->node_id, sd->generation, | |
602 | SBP2_LOGOUT_REQUEST, sd->login_id, | |
603 | NULL); | |
c781c06d KH |
604 | /* |
605 | * Set this back to sbp2_login so we fall back and | |
606 | * retry login on bus reset. | |
607 | */ | |
1da0c93b | 608 | PREPARE_DELAYED_WORK(&sd->work, sbp2_login); |
7f37c426 | 609 | } |
b3d6e151 | 610 | kref_put(&sd->kref, release_sbp2_device); |
7f37c426 | 611 | } |
9ba136d0 KH |
612 | |
613 | static int sbp2_probe(struct device *dev) | |
614 | { | |
615 | struct fw_unit *unit = fw_unit(dev); | |
616 | struct fw_device *device = fw_device(unit->device.parent); | |
617 | struct sbp2_device *sd; | |
618 | struct fw_csr_iterator ci; | |
7f37c426 | 619 | int i, key, value; |
9ba136d0 KH |
620 | u32 model, firmware_revision; |
621 | ||
622 | sd = kzalloc(sizeof *sd, GFP_KERNEL); | |
623 | if (sd == NULL) | |
624 | return -ENOMEM; | |
625 | ||
626 | unit->device.driver_data = sd; | |
627 | sd->unit = unit; | |
628 | INIT_LIST_HEAD(&sd->orb_list); | |
b3d6e151 | 629 | kref_init(&sd->kref); |
9ba136d0 KH |
630 | |
631 | sd->address_handler.length = 0x100; | |
632 | sd->address_handler.address_callback = sbp2_status_write; | |
633 | sd->address_handler.callback_data = sd; | |
634 | ||
635 | if (fw_core_add_address_handler(&sd->address_handler, | |
636 | &fw_high_memory_region) < 0) { | |
637 | kfree(sd); | |
638 | return -EBUSY; | |
639 | } | |
640 | ||
641 | if (fw_device_enable_phys_dma(device) < 0) { | |
642 | fw_core_remove_address_handler(&sd->address_handler); | |
643 | kfree(sd); | |
644 | return -EBUSY; | |
645 | } | |
646 | ||
c781c06d KH |
647 | /* |
648 | * Scan unit directory to get management agent address, | |
9ba136d0 | 649 | * firmware revison and model. Initialize firmware_revision |
c781c06d KH |
650 | * and model to values that wont match anything in our table. |
651 | */ | |
9ba136d0 KH |
652 | firmware_revision = 0xff000000; |
653 | model = 0xff000000; | |
654 | fw_csr_iterator_init(&ci, unit->directory); | |
655 | while (fw_csr_iterator_next(&ci, &key, &value)) { | |
656 | switch (key) { | |
657 | case CSR_DEPENDENT_INFO | CSR_OFFSET: | |
658 | sd->management_agent_address = | |
659 | 0xfffff0000000ULL + 4 * value; | |
660 | break; | |
661 | case SBP2_FIRMWARE_REVISION: | |
662 | firmware_revision = value; | |
663 | break; | |
664 | case CSR_MODEL: | |
665 | model = value; | |
666 | break; | |
667 | } | |
668 | } | |
669 | ||
670 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
671 | if (sbp2_workarounds_table[i].firmware_revision != | |
672 | (firmware_revision & 0xffffff00)) | |
673 | continue; | |
674 | if (sbp2_workarounds_table[i].model != model && | |
675 | sbp2_workarounds_table[i].model != ~0) | |
676 | continue; | |
677 | sd->workarounds |= sbp2_workarounds_table[i].workarounds; | |
678 | break; | |
679 | } | |
680 | ||
681 | if (sd->workarounds) | |
682 | fw_notify("Workarounds for node %s: 0x%x " | |
683 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", | |
684 | unit->device.bus_id, | |
685 | sd->workarounds, firmware_revision, model); | |
686 | ||
b3d6e151 KH |
687 | get_device(&unit->device); |
688 | ||
c781c06d KH |
689 | /* |
690 | * We schedule work to do the login so we can easily | |
b3d6e151 | 691 | * reschedule retries. Always get the ref before scheduling |
c781c06d KH |
692 | * work. |
693 | */ | |
7f37c426 | 694 | INIT_DELAYED_WORK(&sd->work, sbp2_login); |
b3d6e151 KH |
695 | if (schedule_delayed_work(&sd->work, 0)) |
696 | kref_get(&sd->kref); | |
9ba136d0 KH |
697 | |
698 | return 0; | |
699 | } | |
700 | ||
701 | static int sbp2_remove(struct device *dev) | |
702 | { | |
703 | struct fw_unit *unit = fw_unit(dev); | |
704 | struct sbp2_device *sd = unit->device.driver_data; | |
705 | ||
b3d6e151 | 706 | kref_put(&sd->kref, release_sbp2_device); |
9ba136d0 KH |
707 | |
708 | return 0; | |
709 | } | |
710 | ||
711 | static void sbp2_reconnect(struct work_struct *work) | |
712 | { | |
7f37c426 KH |
713 | struct sbp2_device *sd = |
714 | container_of(work, struct sbp2_device, work.work); | |
9ba136d0 KH |
715 | struct fw_unit *unit = sd->unit; |
716 | struct fw_device *device = fw_device(unit->device.parent); | |
717 | int generation, node_id, local_node_id; | |
718 | ||
9ba136d0 KH |
719 | generation = device->card->generation; |
720 | node_id = device->node->node_id; | |
721 | local_node_id = device->card->local_node->node_id; | |
722 | ||
7f37c426 KH |
723 | if (sbp2_send_management_orb(unit, node_id, generation, |
724 | SBP2_RECONNECT_REQUEST, | |
725 | sd->login_id, NULL) < 0) { | |
5c5539d8 | 726 | if (sd->retries++ >= 5) { |
7f37c426 KH |
727 | fw_error("failed to reconnect to %s\n", |
728 | unit->device.bus_id); | |
729 | /* Fall back and try to log in again. */ | |
730 | sd->retries = 0; | |
1da0c93b | 731 | PREPARE_DELAYED_WORK(&sd->work, sbp2_login); |
7f37c426 KH |
732 | } |
733 | schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); | |
734 | return; | |
735 | } | |
9ba136d0 KH |
736 | |
737 | sd->generation = generation; | |
738 | sd->node_id = node_id; | |
907293d7 | 739 | sd->address_high = local_node_id << 16; |
7f37c426 | 740 | |
5c5539d8 KH |
741 | fw_notify("reconnected to unit %s (%d retries)\n", |
742 | unit->device.bus_id, sd->retries); | |
7f37c426 KH |
743 | sbp2_agent_reset(unit); |
744 | sbp2_cancel_orbs(unit); | |
b3d6e151 | 745 | kref_put(&sd->kref, release_sbp2_device); |
9ba136d0 KH |
746 | } |
747 | ||
748 | static void sbp2_update(struct fw_unit *unit) | |
749 | { | |
750 | struct fw_device *device = fw_device(unit->device.parent); | |
751 | struct sbp2_device *sd = unit->device.driver_data; | |
752 | ||
7f37c426 | 753 | sd->retries = 0; |
9ba136d0 | 754 | fw_device_enable_phys_dma(device); |
b3d6e151 KH |
755 | if (schedule_delayed_work(&sd->work, 0)) |
756 | kref_get(&sd->kref); | |
9ba136d0 KH |
757 | } |
758 | ||
759 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
760 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
761 | ||
21ebcd12 | 762 | static const struct fw_device_id sbp2_id_table[] = { |
9ba136d0 KH |
763 | { |
764 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, | |
765 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, | |
5af4e5ea | 766 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
767 | }, |
768 | { } | |
769 | }; | |
770 | ||
771 | static struct fw_driver sbp2_driver = { | |
772 | .driver = { | |
773 | .owner = THIS_MODULE, | |
774 | .name = sbp2_driver_name, | |
775 | .bus = &fw_bus_type, | |
776 | .probe = sbp2_probe, | |
777 | .remove = sbp2_remove, | |
778 | }, | |
779 | .update = sbp2_update, | |
780 | .id_table = sbp2_id_table, | |
781 | }; | |
782 | ||
fbb5423c KH |
783 | static unsigned int |
784 | sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) | |
9ba136d0 | 785 | { |
fbb5423c KH |
786 | int sam_status; |
787 | ||
9ba136d0 KH |
788 | sense_data[0] = 0x70; |
789 | sense_data[1] = 0x0; | |
790 | sense_data[2] = sbp2_status[1]; | |
791 | sense_data[3] = sbp2_status[4]; | |
792 | sense_data[4] = sbp2_status[5]; | |
793 | sense_data[5] = sbp2_status[6]; | |
794 | sense_data[6] = sbp2_status[7]; | |
795 | sense_data[7] = 10; | |
796 | sense_data[8] = sbp2_status[8]; | |
797 | sense_data[9] = sbp2_status[9]; | |
798 | sense_data[10] = sbp2_status[10]; | |
799 | sense_data[11] = sbp2_status[11]; | |
800 | sense_data[12] = sbp2_status[2]; | |
801 | sense_data[13] = sbp2_status[3]; | |
802 | sense_data[14] = sbp2_status[12]; | |
803 | sense_data[15] = sbp2_status[13]; | |
804 | ||
fbb5423c | 805 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 806 | |
fbb5423c KH |
807 | switch (sam_status) { |
808 | case SAM_STAT_GOOD: | |
9ba136d0 | 809 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 810 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 811 | case SAM_STAT_BUSY: |
9ba136d0 KH |
812 | case SAM_STAT_RESERVATION_CONFLICT: |
813 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
814 | return DID_OK << 16 | sam_status; |
815 | ||
9ba136d0 | 816 | default: |
fbb5423c | 817 | return DID_ERROR << 16; |
9ba136d0 KH |
818 | } |
819 | } | |
820 | ||
821 | static void | |
822 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
823 | { | |
824 | struct sbp2_command_orb *orb = (struct sbp2_command_orb *)base_orb; | |
825 | struct fw_unit *unit = orb->unit; | |
826 | struct fw_device *device = fw_device(unit->device.parent); | |
827 | struct scatterlist *sg; | |
828 | int result; | |
829 | ||
830 | if (status != NULL) { | |
fbb5423c | 831 | if (status_get_dead(*status)) |
9ba136d0 | 832 | sbp2_agent_reset(unit); |
9ba136d0 KH |
833 | |
834 | switch (status_get_response(*status)) { | |
835 | case SBP2_STATUS_REQUEST_COMPLETE: | |
fbb5423c | 836 | result = DID_OK << 16; |
9ba136d0 KH |
837 | break; |
838 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 839 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
840 | break; |
841 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
842 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
843 | default: | |
fbb5423c | 844 | result = DID_ERROR << 16; |
9ba136d0 KH |
845 | break; |
846 | } | |
847 | ||
fbb5423c | 848 | if (result == DID_OK << 16 && status_get_len(*status) > 1) |
9ba136d0 KH |
849 | result = sbp2_status_to_sense_data(status_get_data(*status), |
850 | orb->cmd->sense_buffer); | |
851 | } else { | |
c781c06d KH |
852 | /* |
853 | * If the orb completes with status == NULL, something | |
9ba136d0 | 854 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
855 | * or when sending the write (less likely). |
856 | */ | |
fbb5423c | 857 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
858 | } |
859 | ||
860 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
861 | sizeof orb->request, DMA_TO_DEVICE); | |
862 | ||
863 | if (orb->cmd->use_sg > 0) { | |
864 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
865 | dma_unmap_sg(device->card->device, sg, orb->cmd->use_sg, | |
866 | orb->cmd->sc_data_direction); | |
867 | } | |
868 | ||
869 | if (orb->page_table_bus != 0) | |
870 | dma_unmap_single(device->card->device, orb->page_table_bus, | |
871 | sizeof orb->page_table_bus, DMA_TO_DEVICE); | |
872 | ||
873 | if (orb->request_buffer_bus != 0) | |
874 | dma_unmap_single(device->card->device, orb->request_buffer_bus, | |
875 | sizeof orb->request_buffer_bus, | |
876 | DMA_FROM_DEVICE); | |
877 | ||
fbb5423c | 878 | orb->cmd->result = result; |
9ba136d0 | 879 | orb->done(orb->cmd); |
9ba136d0 KH |
880 | kfree(orb); |
881 | } | |
882 | ||
883 | static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) | |
884 | { | |
885 | struct fw_unit *unit = | |
886 | (struct fw_unit *)orb->cmd->device->host->hostdata[0]; | |
887 | struct fw_device *device = fw_device(unit->device.parent); | |
888 | struct sbp2_device *sd = unit->device.driver_data; | |
889 | struct scatterlist *sg; | |
890 | int sg_len, l, i, j, count; | |
891 | size_t size; | |
892 | dma_addr_t sg_addr; | |
893 | ||
894 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
895 | count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg, | |
896 | orb->cmd->sc_data_direction); | |
897 | ||
c781c06d KH |
898 | /* |
899 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
900 | * the scatter list by converting it to an immediate block |
901 | * request. This is also a workaround for broken devices such | |
902 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
903 | * tables. |
904 | */ | |
9ba136d0 KH |
905 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { |
906 | orb->request.data_descriptor.high = sd->address_high; | |
907 | orb->request.data_descriptor.low = sg_dma_address(sg); | |
908 | orb->request.misc |= | |
909 | command_orb_data_size(sg_dma_len(sg)); | |
910 | return; | |
911 | } | |
912 | ||
c781c06d KH |
913 | /* |
914 | * Convert the scatterlist to an sbp2 page table. If any | |
915 | * scatterlist entries are too big for sbp2 we split the as we go. | |
916 | */ | |
9ba136d0 KH |
917 | for (i = 0, j = 0; i < count; i++) { |
918 | sg_len = sg_dma_len(sg + i); | |
919 | sg_addr = sg_dma_address(sg + i); | |
920 | while (sg_len) { | |
921 | l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH); | |
922 | orb->page_table[j].low = sg_addr; | |
923 | orb->page_table[j].high = (l << 16); | |
924 | sg_addr += l; | |
925 | sg_len -= l; | |
926 | j++; | |
927 | } | |
928 | } | |
929 | ||
930 | size = sizeof orb->page_table[0] * j; | |
931 | ||
c781c06d KH |
932 | /* |
933 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
934 | * to fill in the node ID part of the address. All other |
935 | * pointers assume that the data referenced reside on the | |
936 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
937 | * on other nodes so we need to put our ID in descriptor.high. |
938 | */ | |
9ba136d0 KH |
939 | |
940 | orb->page_table_bus = | |
941 | dma_map_single(device->card->device, orb->page_table, | |
942 | size, DMA_TO_DEVICE); | |
943 | orb->request.data_descriptor.high = sd->address_high; | |
944 | orb->request.data_descriptor.low = orb->page_table_bus; | |
945 | orb->request.misc |= | |
946 | command_orb_page_table_present | | |
947 | command_orb_data_size(j); | |
948 | ||
949 | fw_memcpy_to_be32(orb->page_table, orb->page_table, size); | |
950 | } | |
951 | ||
952 | static void sbp2_command_orb_map_buffer(struct sbp2_command_orb *orb) | |
953 | { | |
954 | struct fw_unit *unit = | |
955 | (struct fw_unit *)orb->cmd->device->host->hostdata[0]; | |
956 | struct fw_device *device = fw_device(unit->device.parent); | |
957 | struct sbp2_device *sd = unit->device.driver_data; | |
958 | ||
c781c06d KH |
959 | /* |
960 | * As for map_scatterlist, we need to fill in the high bits of | |
961 | * the data_descriptor pointer. | |
962 | */ | |
9ba136d0 KH |
963 | |
964 | orb->request_buffer_bus = | |
965 | dma_map_single(device->card->device, | |
966 | orb->cmd->request_buffer, | |
967 | orb->cmd->request_bufflen, | |
968 | orb->cmd->sc_data_direction); | |
969 | orb->request.data_descriptor.high = sd->address_high; | |
970 | orb->request.data_descriptor.low = orb->request_buffer_bus; | |
971 | orb->request.misc |= | |
972 | command_orb_data_size(orb->cmd->request_bufflen); | |
973 | } | |
974 | ||
975 | /* SCSI stack integration */ | |
976 | ||
977 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |
978 | { | |
979 | struct fw_unit *unit = (struct fw_unit *)cmd->device->host->hostdata[0]; | |
980 | struct fw_device *device = fw_device(unit->device.parent); | |
981 | struct sbp2_device *sd = unit->device.driver_data; | |
982 | struct sbp2_command_orb *orb; | |
983 | ||
c781c06d KH |
984 | /* |
985 | * Bidirectional commands are not yet implemented, and unknown | |
986 | * transfer direction not handled. | |
987 | */ | |
9ba136d0 KH |
988 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
989 | fw_error("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | |
82eff9db | 990 | goto fail_alloc; |
9ba136d0 KH |
991 | } |
992 | ||
993 | orb = kzalloc(sizeof *orb, GFP_ATOMIC); | |
994 | if (orb == NULL) { | |
995 | fw_notify("failed to alloc orb\n"); | |
82eff9db | 996 | goto fail_alloc; |
9ba136d0 KH |
997 | } |
998 | ||
12f26aa1 KH |
999 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
1000 | orb->base.rcode = -1; | |
9ba136d0 KH |
1001 | orb->base.request_bus = |
1002 | dma_map_single(device->card->device, &orb->request, | |
1003 | sizeof orb->request, DMA_TO_DEVICE); | |
82eff9db KH |
1004 | if (dma_mapping_error(orb->base.request_bus)) |
1005 | goto fail_mapping; | |
9ba136d0 KH |
1006 | |
1007 | orb->unit = unit; | |
1008 | orb->done = done; | |
1009 | orb->cmd = cmd; | |
1010 | ||
1011 | orb->request.next.high = SBP2_ORB_NULL; | |
1012 | orb->request.next.low = 0x0; | |
c781c06d KH |
1013 | /* |
1014 | * At speed 100 we can do 512 bytes per packet, at speed 200, | |
9ba136d0 KH |
1015 | * 1024 bytes per packet etc. The SBP-2 max_payload field |
1016 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
c781c06d KH |
1017 | * if we set this to max_speed + 7, we get the right value. |
1018 | */ | |
9ba136d0 KH |
1019 | orb->request.misc = |
1020 | command_orb_max_payload(device->node->max_speed + 7) | | |
1021 | command_orb_speed(device->node->max_speed) | | |
1022 | command_orb_notify; | |
1023 | ||
1024 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
1025 | orb->request.misc |= | |
1026 | command_orb_direction(SBP2_DIRECTION_FROM_MEDIA); | |
1027 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
1028 | orb->request.misc |= | |
1029 | command_orb_direction(SBP2_DIRECTION_TO_MEDIA); | |
1030 | ||
1031 | if (cmd->use_sg) { | |
1032 | sbp2_command_orb_map_scatterlist(orb); | |
1033 | } else if (cmd->request_bufflen > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
c781c06d KH |
1034 | /* |
1035 | * FIXME: Need to split this into a sg list... but | |
9ba136d0 | 1036 | * could we get the scsi or blk layer to do that by |
c781c06d KH |
1037 | * reporting our max supported block size? |
1038 | */ | |
9ba136d0 | 1039 | fw_error("command > 64k\n"); |
82eff9db | 1040 | goto fail_bufflen; |
9ba136d0 KH |
1041 | } else if (cmd->request_bufflen > 0) { |
1042 | sbp2_command_orb_map_buffer(orb); | |
1043 | } | |
1044 | ||
1045 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request); | |
1046 | ||
1047 | memset(orb->request.command_block, | |
1048 | 0, sizeof orb->request.command_block); | |
1049 | memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); | |
1050 | ||
1051 | orb->base.callback = complete_command_orb; | |
1052 | ||
1053 | sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation, | |
1054 | sd->command_block_agent_address + SBP2_ORB_POINTER); | |
1055 | ||
1056 | return 0; | |
82eff9db KH |
1057 | |
1058 | fail_bufflen: | |
1059 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
1060 | sizeof orb->request, DMA_TO_DEVICE); | |
1061 | fail_mapping: | |
1062 | kfree(orb); | |
1063 | fail_alloc: | |
1064 | cmd->result = DID_ERROR << 16; | |
1065 | done(cmd); | |
1066 | return 0; | |
9ba136d0 KH |
1067 | } |
1068 | ||
cfb01381 SR |
1069 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1070 | { | |
1071 | struct fw_unit *unit = (struct fw_unit *)sdev->host->hostdata[0]; | |
1072 | struct sbp2_device *sd = unit->device.driver_data; | |
1073 | ||
1074 | sdev->allow_restart = 1; | |
1075 | ||
1076 | if (sd->workarounds & SBP2_WORKAROUND_INQUIRY_36) | |
1077 | sdev->inquiry_len = 36; | |
1078 | return 0; | |
1079 | } | |
1080 | ||
9ba136d0 KH |
1081 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1082 | { | |
1083 | struct fw_unit *unit = (struct fw_unit *)sdev->host->hostdata[0]; | |
1084 | struct sbp2_device *sd = unit->device.driver_data; | |
1085 | ||
cfb01381 SR |
1086 | sdev->use_10_for_rw = 1; |
1087 | ||
1088 | if (sdev->type == TYPE_ROM) | |
1089 | sdev->use_10_for_ms = 1; | |
9ba136d0 KH |
1090 | if (sdev->type == TYPE_DISK && |
1091 | sd->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
1092 | sdev->skip_ms_page_8 = 1; | |
1093 | if (sd->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) { | |
1094 | fw_notify("setting fix_capacity for %s\n", unit->device.bus_id); | |
1095 | sdev->fix_capacity = 1; | |
1096 | } | |
1097 | ||
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | /* | |
1102 | * Called by scsi stack when something has really gone wrong. Usually | |
1103 | * called when a command has timed-out for some reason. | |
1104 | */ | |
1105 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1106 | { | |
1107 | struct fw_unit *unit = (struct fw_unit *)cmd->device->host->hostdata[0]; | |
1108 | ||
1109 | fw_notify("sbp2_scsi_abort\n"); | |
0fc7d6e4 | 1110 | sbp2_agent_reset(unit); |
9ba136d0 KH |
1111 | sbp2_cancel_orbs(unit); |
1112 | ||
1113 | return SUCCESS; | |
1114 | } | |
1115 | ||
1116 | static struct scsi_host_template scsi_driver_template = { | |
1117 | .module = THIS_MODULE, | |
1118 | .name = "SBP-2 IEEE-1394", | |
1119 | .proc_name = (char *)sbp2_driver_name, | |
1120 | .queuecommand = sbp2_scsi_queuecommand, | |
cfb01381 | 1121 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1122 | .slave_configure = sbp2_scsi_slave_configure, |
1123 | .eh_abort_handler = sbp2_scsi_abort, | |
1124 | .this_id = -1, | |
1125 | .sg_tablesize = SG_ALL, | |
1126 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1127 | .cmd_per_lun = 1, |
1128 | .can_queue = 1, | |
9ba136d0 KH |
1129 | }; |
1130 | ||
1131 | static int add_scsi_devices(struct fw_unit *unit) | |
1132 | { | |
1133 | struct sbp2_device *sd = unit->device.driver_data; | |
1134 | int retval, lun; | |
1135 | ||
7f37c426 KH |
1136 | if (sd->scsi_host != NULL) |
1137 | return 0; | |
1138 | ||
9ba136d0 KH |
1139 | sd->scsi_host = scsi_host_alloc(&scsi_driver_template, |
1140 | sizeof(unsigned long)); | |
1141 | if (sd->scsi_host == NULL) { | |
1142 | fw_error("failed to register scsi host\n"); | |
1143 | return -1; | |
1144 | } | |
1145 | ||
1146 | sd->scsi_host->hostdata[0] = (unsigned long)unit; | |
1147 | retval = scsi_add_host(sd->scsi_host, &unit->device); | |
1148 | if (retval < 0) { | |
1149 | fw_error("failed to add scsi host\n"); | |
1150 | scsi_host_put(sd->scsi_host); | |
693b9021 | 1151 | sd->scsi_host = NULL; |
9ba136d0 KH |
1152 | return retval; |
1153 | } | |
1154 | ||
1155 | /* FIXME: Loop over luns here. */ | |
1156 | lun = 0; | |
1157 | retval = scsi_add_device(sd->scsi_host, 0, 0, lun); | |
1158 | if (retval < 0) { | |
1159 | fw_error("failed to add scsi device\n"); | |
1160 | scsi_remove_host(sd->scsi_host); | |
1161 | scsi_host_put(sd->scsi_host); | |
693b9021 | 1162 | sd->scsi_host = NULL; |
9ba136d0 KH |
1163 | return retval; |
1164 | } | |
1165 | ||
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | static void remove_scsi_devices(struct fw_unit *unit) | |
1170 | { | |
1171 | struct sbp2_device *sd = unit->device.driver_data; | |
1172 | ||
7f37c426 KH |
1173 | if (sd->scsi_host != NULL) { |
1174 | scsi_remove_host(sd->scsi_host); | |
1175 | scsi_host_put(sd->scsi_host); | |
1176 | } | |
1177 | sd->scsi_host = NULL; | |
9ba136d0 KH |
1178 | } |
1179 | ||
1180 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); | |
1181 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1182 | MODULE_LICENSE("GPL"); | |
1183 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1184 | ||
1185 | static int __init sbp2_init(void) | |
1186 | { | |
1187 | return driver_register(&sbp2_driver.driver); | |
1188 | } | |
1189 | ||
1190 | static void __exit sbp2_cleanup(void) | |
1191 | { | |
1192 | driver_unregister(&sbp2_driver.driver); | |
1193 | } | |
1194 | ||
1195 | module_init(sbp2_init); | |
1196 | module_exit(sbp2_cleanup); |