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Commit | Line | Data |
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c781c06d KH |
1 | /* |
2 | * SBP2 driver (SCSI over IEEE1394) | |
9ba136d0 | 3 | * |
27a15e50 | 4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
9ba136d0 KH |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
c781c06d KH |
21 | /* |
22 | * The basic structure of this driver is based on the old storage driver, | |
27a15e50 KH |
23 | * drivers/ieee1394/sbp2.c, originally written by |
24 | * James Goodwin <jamesg@filanet.com> | |
25 | * with later contributions and ongoing maintenance from | |
26 | * Ben Collins <bcollins@debian.org>, | |
27 | * Stefan Richter <stefanr@s5r6.in-berlin.de> | |
28 | * and many others. | |
29 | */ | |
30 | ||
9ba136d0 KH |
31 | #include <linux/kernel.h> |
32 | #include <linux/module.h> | |
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... */ | |
a98e2719 | 50 | typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); |
9ba136d0 KH |
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 | }; |
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 | ||
a77754a7 KH |
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) | |
9ba136d0 KH |
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; | |
a98e2719 | 150 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
9ba136d0 KH |
151 | struct list_head link; |
152 | }; | |
153 | ||
a77754a7 KH |
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) | |
9ba136d0 | 160 | |
a77754a7 KH |
161 | #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) |
162 | #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) | |
9ba136d0 KH |
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 | ||
a77754a7 KH |
179 | #define LOGIN_RESPONSE_GET_LOGIN_ID(v) ((v).misc & 0xffff) |
180 | #define LOGIN_RESPONSE_GET_LENGTH(v) (((v).misc >> 16) & 0xffff) | |
9ba136d0 KH |
181 | |
182 | struct sbp2_login_response { | |
183 | u32 misc; | |
184 | struct sbp2_pointer command_block_agent; | |
185 | u32 reconnect_hold; | |
186 | }; | |
a77754a7 KH |
187 | #define COMMAND_ORB_DATA_SIZE(v) ((v)) |
188 | #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) | |
189 | #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) | |
190 | #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) | |
191 | #define COMMAND_ORB_SPEED(v) ((v) << 24) | |
192 | #define COMMAND_ORB_DIRECTION(v) ((v) << 27) | |
193 | #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) | |
194 | #define COMMAND_ORB_NOTIFY ((1) << 31) | |
9ba136d0 KH |
195 | |
196 | struct sbp2_command_orb { | |
197 | struct sbp2_orb base; | |
198 | struct { | |
199 | struct sbp2_pointer next; | |
200 | struct sbp2_pointer data_descriptor; | |
201 | u32 misc; | |
202 | u8 command_block[12]; | |
203 | } request; | |
204 | struct scsi_cmnd *cmd; | |
205 | scsi_done_fn_t done; | |
206 | struct fw_unit *unit; | |
207 | ||
208 | struct sbp2_pointer page_table[SG_ALL]; | |
209 | dma_addr_t page_table_bus; | |
210 | dma_addr_t request_buffer_bus; | |
211 | }; | |
212 | ||
213 | /* | |
214 | * List of devices with known bugs. | |
215 | * | |
216 | * The firmware_revision field, masked with 0xffff00, is the best | |
217 | * indicator for the type of bridge chip of a device. It yields a few | |
218 | * false positives but this did not break correctly behaving devices | |
219 | * so far. We use ~0 as a wildcard, since the 24 bit values we get | |
220 | * from the config rom can never match that. | |
221 | */ | |
222 | static const struct { | |
223 | u32 firmware_revision; | |
224 | u32 model; | |
225 | unsigned workarounds; | |
226 | } sbp2_workarounds_table[] = { | |
227 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
228 | .firmware_revision = 0x002800, | |
229 | .model = 0x001010, | |
230 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
231 | SBP2_WORKAROUND_MODE_SENSE_8, | |
232 | }, | |
233 | /* Initio bridges, actually only needed for some older ones */ { | |
234 | .firmware_revision = 0x000200, | |
235 | .model = ~0, | |
236 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
237 | }, | |
238 | /* Symbios bridge */ { | |
239 | .firmware_revision = 0xa0b800, | |
240 | .model = ~0, | |
241 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
242 | }, | |
c781c06d KH |
243 | |
244 | /* | |
245 | * There are iPods (2nd gen, 3rd gen) with model_id == 0, but | |
9ba136d0 KH |
246 | * these iPods do not feature the read_capacity bug according |
247 | * to one report. Read_capacity behaviour as well as model_id | |
c781c06d KH |
248 | * could change due to Apple-supplied firmware updates though. |
249 | */ | |
250 | ||
9ba136d0 KH |
251 | /* iPod 4th generation. */ { |
252 | .firmware_revision = 0x0a2700, | |
253 | .model = 0x000021, | |
254 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
255 | }, | |
256 | /* iPod mini */ { | |
257 | .firmware_revision = 0x0a2700, | |
258 | .model = 0x000023, | |
259 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
260 | }, | |
261 | /* iPod Photo */ { | |
262 | .firmware_revision = 0x0a2700, | |
263 | .model = 0x00007e, | |
264 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
265 | } | |
266 | }; | |
267 | ||
268 | static void | |
269 | sbp2_status_write(struct fw_card *card, struct fw_request *request, | |
270 | int tcode, int destination, int source, | |
271 | int generation, int speed, | |
272 | unsigned long long offset, | |
273 | void *payload, size_t length, void *callback_data) | |
274 | { | |
275 | struct sbp2_device *sd = callback_data; | |
276 | struct sbp2_orb *orb; | |
277 | struct sbp2_status status; | |
278 | size_t header_size; | |
279 | unsigned long flags; | |
280 | ||
281 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
282 | length == 0 || length > sizeof status) { | |
283 | fw_send_response(card, request, RCODE_TYPE_ERROR); | |
284 | return; | |
285 | } | |
286 | ||
287 | header_size = min(length, 2 * sizeof(u32)); | |
288 | fw_memcpy_from_be32(&status, payload, header_size); | |
289 | if (length > header_size) | |
290 | memcpy(status.data, payload + 8, length - header_size); | |
a77754a7 | 291 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
9ba136d0 KH |
292 | fw_notify("non-orb related status write, not handled\n"); |
293 | fw_send_response(card, request, RCODE_COMPLETE); | |
294 | return; | |
295 | } | |
296 | ||
297 | /* Lookup the orb corresponding to this status write. */ | |
298 | spin_lock_irqsave(&card->lock, flags); | |
299 | list_for_each_entry(orb, &sd->orb_list, link) { | |
a77754a7 KH |
300 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
301 | STATUS_GET_ORB_LOW(status) == orb->request_bus && | |
12f26aa1 | 302 | orb->rcode == RCODE_COMPLETE) { |
9ba136d0 KH |
303 | list_del(&orb->link); |
304 | break; | |
305 | } | |
306 | } | |
307 | spin_unlock_irqrestore(&card->lock, flags); | |
308 | ||
309 | if (&orb->link != &sd->orb_list) | |
310 | orb->callback(orb, &status); | |
311 | else | |
312 | fw_error("status write for unknown orb\n"); | |
313 | ||
314 | fw_send_response(card, request, RCODE_COMPLETE); | |
315 | } | |
316 | ||
317 | static void | |
318 | complete_transaction(struct fw_card *card, int rcode, | |
319 | void *payload, size_t length, void *data) | |
320 | { | |
321 | struct sbp2_orb *orb = data; | |
322 | unsigned long flags; | |
323 | ||
324 | orb->rcode = rcode; | |
325 | if (rcode != RCODE_COMPLETE) { | |
326 | spin_lock_irqsave(&card->lock, flags); | |
327 | list_del(&orb->link); | |
328 | spin_unlock_irqrestore(&card->lock, flags); | |
329 | orb->callback(orb, NULL); | |
330 | } | |
331 | } | |
332 | ||
333 | static void | |
334 | sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, | |
335 | int node_id, int generation, u64 offset) | |
336 | { | |
337 | struct fw_device *device = fw_device(unit->device.parent); | |
338 | struct sbp2_device *sd = unit->device.driver_data; | |
339 | unsigned long flags; | |
340 | ||
341 | orb->pointer.high = 0; | |
342 | orb->pointer.low = orb->request_bus; | |
343 | fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof orb->pointer); | |
344 | ||
345 | spin_lock_irqsave(&device->card->lock, flags); | |
346 | list_add_tail(&orb->link, &sd->orb_list); | |
347 | spin_unlock_irqrestore(&device->card->lock, flags); | |
348 | ||
349 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, | |
907293d7 | 350 | node_id, generation, |
9ba136d0 KH |
351 | device->node->max_speed, offset, |
352 | &orb->pointer, sizeof orb->pointer, | |
353 | complete_transaction, orb); | |
354 | } | |
355 | ||
2aaad97b | 356 | static int sbp2_cancel_orbs(struct fw_unit *unit) |
9ba136d0 KH |
357 | { |
358 | struct fw_device *device = fw_device(unit->device.parent); | |
359 | struct sbp2_device *sd = unit->device.driver_data; | |
360 | struct sbp2_orb *orb, *next; | |
361 | struct list_head list; | |
362 | unsigned long flags; | |
2aaad97b | 363 | int retval = -ENOENT; |
9ba136d0 KH |
364 | |
365 | INIT_LIST_HEAD(&list); | |
366 | spin_lock_irqsave(&device->card->lock, flags); | |
367 | list_splice_init(&sd->orb_list, &list); | |
368 | spin_unlock_irqrestore(&device->card->lock, flags); | |
369 | ||
370 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 371 | retval = 0; |
730c32f5 KH |
372 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
373 | continue; | |
374 | ||
9ba136d0 KH |
375 | orb->rcode = RCODE_CANCELLED; |
376 | orb->callback(orb, NULL); | |
377 | } | |
9ba136d0 | 378 | |
2aaad97b | 379 | return retval; |
1d3d52c5 KH |
380 | } |
381 | ||
9ba136d0 KH |
382 | static void |
383 | complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
384 | { | |
385 | struct sbp2_management_orb *orb = | |
386 | (struct sbp2_management_orb *)base_orb; | |
387 | ||
388 | if (status) | |
389 | memcpy(&orb->status, status, sizeof *status); | |
390 | complete(&orb->done); | |
391 | } | |
392 | ||
393 | static int | |
394 | sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, | |
395 | int function, int lun, void *response) | |
396 | { | |
397 | struct fw_device *device = fw_device(unit->device.parent); | |
398 | struct sbp2_device *sd = unit->device.driver_data; | |
399 | struct sbp2_management_orb *orb; | |
9ba136d0 KH |
400 | int retval = -ENOMEM; |
401 | ||
402 | orb = kzalloc(sizeof *orb, GFP_ATOMIC); | |
403 | if (orb == NULL) | |
404 | return -ENOMEM; | |
405 | ||
c781c06d KH |
406 | /* |
407 | * The sbp2 device is going to send a block read request to | |
408 | * read out the request from host memory, so map it for dma. | |
409 | */ | |
9ba136d0 KH |
410 | orb->base.request_bus = |
411 | dma_map_single(device->card->device, &orb->request, | |
412 | sizeof orb->request, DMA_TO_DEVICE); | |
82eff9db | 413 | if (dma_mapping_error(orb->base.request_bus)) |
9ba136d0 KH |
414 | goto out; |
415 | ||
416 | orb->response_bus = | |
417 | dma_map_single(device->card->device, &orb->response, | |
418 | sizeof orb->response, DMA_FROM_DEVICE); | |
82eff9db | 419 | if (dma_mapping_error(orb->response_bus)) |
9ba136d0 KH |
420 | goto out; |
421 | ||
422 | orb->request.response.high = 0; | |
423 | orb->request.response.low = orb->response_bus; | |
424 | ||
425 | orb->request.misc = | |
a77754a7 KH |
426 | MANAGEMENT_ORB_NOTIFY | |
427 | MANAGEMENT_ORB_FUNCTION(function) | | |
428 | MANAGEMENT_ORB_LUN(lun); | |
9ba136d0 | 429 | orb->request.length = |
a77754a7 | 430 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof orb->response); |
9ba136d0 KH |
431 | |
432 | orb->request.status_fifo.high = sd->address_handler.offset >> 32; | |
433 | orb->request.status_fifo.low = sd->address_handler.offset; | |
434 | ||
c781c06d KH |
435 | /* |
436 | * FIXME: Yeah, ok this isn't elegant, we hardwire exclusive | |
9ba136d0 | 437 | * login and 1 second reconnect time. The reconnect setting |
c781c06d KH |
438 | * is probably fine, but the exclusive login should be an option. |
439 | */ | |
9ba136d0 KH |
440 | if (function == SBP2_LOGIN_REQUEST) { |
441 | orb->request.misc |= | |
a77754a7 KH |
442 | MANAGEMENT_ORB_EXCLUSIVE | |
443 | MANAGEMENT_ORB_RECONNECT(0); | |
9ba136d0 KH |
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; | |
2aaad97b | 450 | |
9ba136d0 KH |
451 | sbp2_send_orb(&orb->base, unit, |
452 | node_id, generation, sd->management_agent_address); | |
453 | ||
2aaad97b KH |
454 | wait_for_completion_timeout(&orb->done, |
455 | msecs_to_jiffies(SBP2_ORB_TIMEOUT)); | |
9ba136d0 | 456 | |
9ba136d0 | 457 | retval = -EIO; |
2aaad97b KH |
458 | if (sbp2_cancel_orbs(unit) == 0) { |
459 | fw_error("orb reply timed out, rcode=0x%02x\n", | |
9ba136d0 KH |
460 | orb->base.rcode); |
461 | goto out; | |
462 | } | |
463 | ||
2aaad97b KH |
464 | if (orb->base.rcode != RCODE_COMPLETE) { |
465 | fw_error("management write failed, rcode 0x%02x\n", | |
9ba136d0 KH |
466 | orb->base.rcode); |
467 | goto out; | |
468 | } | |
469 | ||
a77754a7 KH |
470 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
471 | STATUS_GET_SBP_STATUS(orb->status) != 0) { | |
9ba136d0 | 472 | fw_error("error status: %d:%d\n", |
a77754a7 KH |
473 | STATUS_GET_RESPONSE(orb->status), |
474 | STATUS_GET_SBP_STATUS(orb->status)); | |
9ba136d0 KH |
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 | ||
9ba136d0 KH |
499 | kfree(t); |
500 | } | |
501 | ||
502 | static int sbp2_agent_reset(struct fw_unit *unit) | |
503 | { | |
504 | struct fw_device *device = fw_device(unit->device.parent); | |
505 | struct sbp2_device *sd = unit->device.driver_data; | |
506 | struct fw_transaction *t; | |
507 | static u32 zero; | |
508 | ||
509 | t = kzalloc(sizeof *t, GFP_ATOMIC); | |
510 | if (t == NULL) | |
511 | return -ENOMEM; | |
512 | ||
513 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
907293d7 | 514 | sd->node_id, sd->generation, SCODE_400, |
9ba136d0 KH |
515 | sd->command_block_agent_address + SBP2_AGENT_RESET, |
516 | &zero, sizeof zero, complete_agent_reset_write, t); | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
7f37c426 | 521 | static void sbp2_reconnect(struct work_struct *work); |
ad85274f | 522 | static struct scsi_host_template scsi_driver_template; |
7f37c426 | 523 | |
b3d6e151 KH |
524 | static void |
525 | release_sbp2_device(struct kref *kref) | |
526 | { | |
527 | struct sbp2_device *sd = container_of(kref, struct sbp2_device, kref); | |
ad85274f KH |
528 | struct Scsi_Host *host = |
529 | container_of((void *)sd, struct Scsi_Host, hostdata[0]); | |
b3d6e151 KH |
530 | |
531 | sbp2_send_management_orb(sd->unit, sd->node_id, sd->generation, | |
532 | SBP2_LOGOUT_REQUEST, sd->login_id, NULL); | |
533 | ||
ad85274f | 534 | scsi_remove_host(host); |
b3d6e151 KH |
535 | fw_core_remove_address_handler(&sd->address_handler); |
536 | fw_notify("removed sbp2 unit %s\n", sd->unit->device.bus_id); | |
537 | put_device(&sd->unit->device); | |
ad85274f | 538 | scsi_host_put(host); |
b3d6e151 KH |
539 | } |
540 | ||
7f37c426 KH |
541 | static void sbp2_login(struct work_struct *work) |
542 | { | |
543 | struct sbp2_device *sd = | |
544 | container_of(work, struct sbp2_device, work.work); | |
ad85274f KH |
545 | struct Scsi_Host *host = |
546 | container_of((void *)sd, struct Scsi_Host, hostdata[0]); | |
7f37c426 KH |
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); | |
b3d6e151 | 566 | kref_put(&sd->kref, release_sbp2_device); |
7f37c426 KH |
567 | } |
568 | return; | |
569 | } | |
570 | ||
571 | sd->generation = generation; | |
572 | sd->node_id = node_id; | |
573 | sd->address_high = local_node_id << 16; | |
574 | ||
575 | /* Get command block agent offset and login id. */ | |
576 | sd->command_block_agent_address = | |
5c5539d8 | 577 | ((u64) (response.command_block_agent.high & 0xffff) << 32) | |
7f37c426 | 578 | response.command_block_agent.low; |
a77754a7 | 579 | sd->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response); |
7f37c426 | 580 | |
5c5539d8 KH |
581 | fw_notify("logged in to sbp2 unit %s (%d retries)\n", |
582 | unit->device.bus_id, sd->retries); | |
583 | fw_notify(" - management_agent_address: 0x%012llx\n", | |
7f37c426 KH |
584 | (unsigned long long) sd->management_agent_address); |
585 | fw_notify(" - command_block_agent_address: 0x%012llx\n", | |
586 | (unsigned long long) sd->command_block_agent_address); | |
5c5539d8 | 587 | fw_notify(" - status write address: 0x%012llx\n", |
7f37c426 KH |
588 | (unsigned long long) sd->address_handler.offset); |
589 | ||
590 | #if 0 | |
591 | /* FIXME: The linux1394 sbp2 does this last step. */ | |
592 | sbp2_set_busy_timeout(scsi_id); | |
593 | #endif | |
594 | ||
1da0c93b | 595 | PREPARE_DELAYED_WORK(&sd->work, sbp2_reconnect); |
7f37c426 KH |
596 | sbp2_agent_reset(unit); |
597 | ||
ad85274f KH |
598 | /* FIXME: Loop over luns here. */ |
599 | lun = 0; | |
600 | retval = scsi_add_device(host, 0, 0, lun); | |
7f37c426 KH |
601 | if (retval < 0) { |
602 | sbp2_send_management_orb(unit, sd->node_id, sd->generation, | |
603 | SBP2_LOGOUT_REQUEST, sd->login_id, | |
604 | NULL); | |
c781c06d KH |
605 | /* |
606 | * Set this back to sbp2_login so we fall back and | |
607 | * retry login on bus reset. | |
608 | */ | |
1da0c93b | 609 | PREPARE_DELAYED_WORK(&sd->work, sbp2_login); |
7f37c426 | 610 | } |
b3d6e151 | 611 | kref_put(&sd->kref, release_sbp2_device); |
7f37c426 | 612 | } |
9ba136d0 KH |
613 | |
614 | static int sbp2_probe(struct device *dev) | |
615 | { | |
616 | struct fw_unit *unit = fw_unit(dev); | |
617 | struct fw_device *device = fw_device(unit->device.parent); | |
618 | struct sbp2_device *sd; | |
619 | struct fw_csr_iterator ci; | |
ad85274f KH |
620 | struct Scsi_Host *host; |
621 | int i, key, value, err; | |
9ba136d0 KH |
622 | u32 model, firmware_revision; |
623 | ||
ad85274f KH |
624 | err = -ENOMEM; |
625 | host = scsi_host_alloc(&scsi_driver_template, sizeof(*sd)); | |
626 | if (host == NULL) | |
627 | goto fail; | |
9ba136d0 | 628 | |
ad85274f | 629 | sd = (struct sbp2_device *) host->hostdata; |
9ba136d0 KH |
630 | unit->device.driver_data = sd; |
631 | sd->unit = unit; | |
632 | INIT_LIST_HEAD(&sd->orb_list); | |
b3d6e151 | 633 | kref_init(&sd->kref); |
9ba136d0 KH |
634 | |
635 | sd->address_handler.length = 0x100; | |
636 | sd->address_handler.address_callback = sbp2_status_write; | |
637 | sd->address_handler.callback_data = sd; | |
638 | ||
ad85274f KH |
639 | err = fw_core_add_address_handler(&sd->address_handler, |
640 | &fw_high_memory_region); | |
641 | if (err < 0) | |
642 | goto fail_host; | |
9ba136d0 | 643 | |
ad85274f KH |
644 | err = fw_device_enable_phys_dma(device); |
645 | if (err < 0) | |
646 | goto fail_address_handler; | |
647 | ||
648 | err = scsi_add_host(host, &unit->device); | |
649 | if (err < 0) | |
650 | goto fail_address_handler; | |
9ba136d0 | 651 | |
c781c06d KH |
652 | /* |
653 | * Scan unit directory to get management agent address, | |
9ba136d0 | 654 | * firmware revison and model. Initialize firmware_revision |
c781c06d KH |
655 | * and model to values that wont match anything in our table. |
656 | */ | |
9ba136d0 KH |
657 | firmware_revision = 0xff000000; |
658 | model = 0xff000000; | |
659 | fw_csr_iterator_init(&ci, unit->directory); | |
660 | while (fw_csr_iterator_next(&ci, &key, &value)) { | |
661 | switch (key) { | |
662 | case CSR_DEPENDENT_INFO | CSR_OFFSET: | |
663 | sd->management_agent_address = | |
664 | 0xfffff0000000ULL + 4 * value; | |
665 | break; | |
666 | case SBP2_FIRMWARE_REVISION: | |
667 | firmware_revision = value; | |
668 | break; | |
669 | case CSR_MODEL: | |
670 | model = value; | |
671 | break; | |
672 | } | |
673 | } | |
674 | ||
675 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
676 | if (sbp2_workarounds_table[i].firmware_revision != | |
677 | (firmware_revision & 0xffffff00)) | |
678 | continue; | |
679 | if (sbp2_workarounds_table[i].model != model && | |
680 | sbp2_workarounds_table[i].model != ~0) | |
681 | continue; | |
682 | sd->workarounds |= sbp2_workarounds_table[i].workarounds; | |
683 | break; | |
684 | } | |
685 | ||
686 | if (sd->workarounds) | |
687 | fw_notify("Workarounds for node %s: 0x%x " | |
688 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", | |
689 | unit->device.bus_id, | |
690 | sd->workarounds, firmware_revision, model); | |
691 | ||
b3d6e151 KH |
692 | get_device(&unit->device); |
693 | ||
c781c06d KH |
694 | /* |
695 | * We schedule work to do the login so we can easily | |
b3d6e151 | 696 | * reschedule retries. Always get the ref before scheduling |
c781c06d KH |
697 | * work. |
698 | */ | |
7f37c426 | 699 | INIT_DELAYED_WORK(&sd->work, sbp2_login); |
b3d6e151 KH |
700 | if (schedule_delayed_work(&sd->work, 0)) |
701 | kref_get(&sd->kref); | |
9ba136d0 KH |
702 | |
703 | return 0; | |
ad85274f KH |
704 | |
705 | fail_address_handler: | |
706 | fw_core_remove_address_handler(&sd->address_handler); | |
707 | fail_host: | |
708 | scsi_host_put(host); | |
709 | fail: | |
710 | return err; | |
9ba136d0 KH |
711 | } |
712 | ||
713 | static int sbp2_remove(struct device *dev) | |
714 | { | |
715 | struct fw_unit *unit = fw_unit(dev); | |
716 | struct sbp2_device *sd = unit->device.driver_data; | |
717 | ||
b3d6e151 | 718 | kref_put(&sd->kref, release_sbp2_device); |
9ba136d0 KH |
719 | |
720 | return 0; | |
721 | } | |
722 | ||
723 | static void sbp2_reconnect(struct work_struct *work) | |
724 | { | |
7f37c426 KH |
725 | struct sbp2_device *sd = |
726 | container_of(work, struct sbp2_device, work.work); | |
9ba136d0 KH |
727 | struct fw_unit *unit = sd->unit; |
728 | struct fw_device *device = fw_device(unit->device.parent); | |
729 | int generation, node_id, local_node_id; | |
730 | ||
9ba136d0 KH |
731 | generation = device->card->generation; |
732 | node_id = device->node->node_id; | |
733 | local_node_id = device->card->local_node->node_id; | |
734 | ||
7f37c426 KH |
735 | if (sbp2_send_management_orb(unit, node_id, generation, |
736 | SBP2_RECONNECT_REQUEST, | |
737 | sd->login_id, NULL) < 0) { | |
5c5539d8 | 738 | if (sd->retries++ >= 5) { |
7f37c426 KH |
739 | fw_error("failed to reconnect to %s\n", |
740 | unit->device.bus_id); | |
741 | /* Fall back and try to log in again. */ | |
742 | sd->retries = 0; | |
1da0c93b | 743 | PREPARE_DELAYED_WORK(&sd->work, sbp2_login); |
7f37c426 KH |
744 | } |
745 | schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); | |
746 | return; | |
747 | } | |
9ba136d0 KH |
748 | |
749 | sd->generation = generation; | |
750 | sd->node_id = node_id; | |
907293d7 | 751 | sd->address_high = local_node_id << 16; |
7f37c426 | 752 | |
5c5539d8 KH |
753 | fw_notify("reconnected to unit %s (%d retries)\n", |
754 | unit->device.bus_id, sd->retries); | |
7f37c426 KH |
755 | sbp2_agent_reset(unit); |
756 | sbp2_cancel_orbs(unit); | |
b3d6e151 | 757 | kref_put(&sd->kref, release_sbp2_device); |
9ba136d0 KH |
758 | } |
759 | ||
760 | static void sbp2_update(struct fw_unit *unit) | |
761 | { | |
762 | struct fw_device *device = fw_device(unit->device.parent); | |
763 | struct sbp2_device *sd = unit->device.driver_data; | |
764 | ||
7f37c426 | 765 | sd->retries = 0; |
9ba136d0 | 766 | fw_device_enable_phys_dma(device); |
b3d6e151 KH |
767 | if (schedule_delayed_work(&sd->work, 0)) |
768 | kref_get(&sd->kref); | |
9ba136d0 KH |
769 | } |
770 | ||
771 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
772 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
773 | ||
21ebcd12 | 774 | static const struct fw_device_id sbp2_id_table[] = { |
9ba136d0 KH |
775 | { |
776 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, | |
777 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, | |
5af4e5ea | 778 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
779 | }, |
780 | { } | |
781 | }; | |
782 | ||
783 | static struct fw_driver sbp2_driver = { | |
784 | .driver = { | |
785 | .owner = THIS_MODULE, | |
786 | .name = sbp2_driver_name, | |
787 | .bus = &fw_bus_type, | |
788 | .probe = sbp2_probe, | |
789 | .remove = sbp2_remove, | |
790 | }, | |
791 | .update = sbp2_update, | |
792 | .id_table = sbp2_id_table, | |
793 | }; | |
794 | ||
fbb5423c KH |
795 | static unsigned int |
796 | sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) | |
9ba136d0 | 797 | { |
fbb5423c KH |
798 | int sam_status; |
799 | ||
9ba136d0 KH |
800 | sense_data[0] = 0x70; |
801 | sense_data[1] = 0x0; | |
802 | sense_data[2] = sbp2_status[1]; | |
803 | sense_data[3] = sbp2_status[4]; | |
804 | sense_data[4] = sbp2_status[5]; | |
805 | sense_data[5] = sbp2_status[6]; | |
806 | sense_data[6] = sbp2_status[7]; | |
807 | sense_data[7] = 10; | |
808 | sense_data[8] = sbp2_status[8]; | |
809 | sense_data[9] = sbp2_status[9]; | |
810 | sense_data[10] = sbp2_status[10]; | |
811 | sense_data[11] = sbp2_status[11]; | |
812 | sense_data[12] = sbp2_status[2]; | |
813 | sense_data[13] = sbp2_status[3]; | |
814 | sense_data[14] = sbp2_status[12]; | |
815 | sense_data[15] = sbp2_status[13]; | |
816 | ||
fbb5423c | 817 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 818 | |
fbb5423c KH |
819 | switch (sam_status) { |
820 | case SAM_STAT_GOOD: | |
9ba136d0 | 821 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 822 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 823 | case SAM_STAT_BUSY: |
9ba136d0 KH |
824 | case SAM_STAT_RESERVATION_CONFLICT: |
825 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
826 | return DID_OK << 16 | sam_status; |
827 | ||
9ba136d0 | 828 | default: |
fbb5423c | 829 | return DID_ERROR << 16; |
9ba136d0 KH |
830 | } |
831 | } | |
832 | ||
833 | static void | |
834 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
835 | { | |
836 | struct sbp2_command_orb *orb = (struct sbp2_command_orb *)base_orb; | |
837 | struct fw_unit *unit = orb->unit; | |
838 | struct fw_device *device = fw_device(unit->device.parent); | |
839 | struct scatterlist *sg; | |
840 | int result; | |
841 | ||
842 | if (status != NULL) { | |
a77754a7 | 843 | if (STATUS_GET_DEAD(*status)) |
9ba136d0 | 844 | sbp2_agent_reset(unit); |
9ba136d0 | 845 | |
a77754a7 | 846 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 847 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 848 | result = DID_OK << 16; |
9ba136d0 KH |
849 | break; |
850 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 851 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
852 | break; |
853 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
854 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
855 | default: | |
fbb5423c | 856 | result = DID_ERROR << 16; |
9ba136d0 KH |
857 | break; |
858 | } | |
859 | ||
a77754a7 KH |
860 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
861 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
862 | orb->cmd->sense_buffer); |
863 | } else { | |
c781c06d KH |
864 | /* |
865 | * If the orb completes with status == NULL, something | |
9ba136d0 | 866 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
867 | * or when sending the write (less likely). |
868 | */ | |
fbb5423c | 869 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
870 | } |
871 | ||
872 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
873 | sizeof orb->request, DMA_TO_DEVICE); | |
874 | ||
875 | if (orb->cmd->use_sg > 0) { | |
876 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
877 | dma_unmap_sg(device->card->device, sg, orb->cmd->use_sg, | |
878 | orb->cmd->sc_data_direction); | |
879 | } | |
880 | ||
881 | if (orb->page_table_bus != 0) | |
882 | dma_unmap_single(device->card->device, orb->page_table_bus, | |
883 | sizeof orb->page_table_bus, DMA_TO_DEVICE); | |
884 | ||
885 | if (orb->request_buffer_bus != 0) | |
886 | dma_unmap_single(device->card->device, orb->request_buffer_bus, | |
887 | sizeof orb->request_buffer_bus, | |
888 | DMA_FROM_DEVICE); | |
889 | ||
fbb5423c | 890 | orb->cmd->result = result; |
9ba136d0 | 891 | orb->done(orb->cmd); |
9ba136d0 KH |
892 | kfree(orb); |
893 | } | |
894 | ||
95ffc5e3 | 895 | static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) |
9ba136d0 | 896 | { |
ad85274f KH |
897 | struct sbp2_device *sd = |
898 | (struct sbp2_device *)orb->cmd->device->host->hostdata; | |
899 | struct fw_unit *unit = sd->unit; | |
9ba136d0 | 900 | struct fw_device *device = fw_device(unit->device.parent); |
9ba136d0 KH |
901 | struct scatterlist *sg; |
902 | int sg_len, l, i, j, count; | |
903 | size_t size; | |
904 | dma_addr_t sg_addr; | |
905 | ||
906 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
907 | count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg, | |
908 | orb->cmd->sc_data_direction); | |
95ffc5e3 KH |
909 | if (count == 0) |
910 | goto fail; | |
9ba136d0 | 911 | |
c781c06d KH |
912 | /* |
913 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
914 | * the scatter list by converting it to an immediate block |
915 | * request. This is also a workaround for broken devices such | |
916 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
917 | * tables. |
918 | */ | |
9ba136d0 KH |
919 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { |
920 | orb->request.data_descriptor.high = sd->address_high; | |
921 | orb->request.data_descriptor.low = sg_dma_address(sg); | |
922 | orb->request.misc |= | |
a77754a7 | 923 | COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)); |
95ffc5e3 | 924 | return 0; |
9ba136d0 KH |
925 | } |
926 | ||
c781c06d KH |
927 | /* |
928 | * Convert the scatterlist to an sbp2 page table. If any | |
929 | * scatterlist entries are too big for sbp2 we split the as we go. | |
930 | */ | |
9ba136d0 KH |
931 | for (i = 0, j = 0; i < count; i++) { |
932 | sg_len = sg_dma_len(sg + i); | |
933 | sg_addr = sg_dma_address(sg + i); | |
934 | while (sg_len) { | |
935 | l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH); | |
936 | orb->page_table[j].low = sg_addr; | |
937 | orb->page_table[j].high = (l << 16); | |
938 | sg_addr += l; | |
939 | sg_len -= l; | |
940 | j++; | |
941 | } | |
942 | } | |
943 | ||
944 | size = sizeof orb->page_table[0] * j; | |
945 | ||
c781c06d KH |
946 | /* |
947 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
948 | * to fill in the node ID part of the address. All other |
949 | * pointers assume that the data referenced reside on the | |
950 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
951 | * on other nodes so we need to put our ID in descriptor.high. |
952 | */ | |
9ba136d0 KH |
953 | |
954 | orb->page_table_bus = | |
955 | dma_map_single(device->card->device, orb->page_table, | |
956 | size, DMA_TO_DEVICE); | |
95ffc5e3 KH |
957 | if (dma_mapping_error(orb->page_table_bus)) |
958 | goto fail_page_table; | |
9ba136d0 KH |
959 | orb->request.data_descriptor.high = sd->address_high; |
960 | orb->request.data_descriptor.low = orb->page_table_bus; | |
961 | orb->request.misc |= | |
a77754a7 KH |
962 | COMMAND_ORB_PAGE_TABLE_PRESENT | |
963 | COMMAND_ORB_DATA_SIZE(j); | |
9ba136d0 KH |
964 | |
965 | fw_memcpy_to_be32(orb->page_table, orb->page_table, size); | |
95ffc5e3 KH |
966 | |
967 | return 0; | |
968 | ||
969 | fail_page_table: | |
970 | dma_unmap_sg(device->card->device, sg, orb->cmd->use_sg, | |
971 | orb->cmd->sc_data_direction); | |
972 | fail: | |
973 | return -ENOMEM; | |
9ba136d0 KH |
974 | } |
975 | ||
95ffc5e3 | 976 | static int sbp2_command_orb_map_buffer(struct sbp2_command_orb *orb) |
9ba136d0 | 977 | { |
ad85274f KH |
978 | struct sbp2_device *sd = |
979 | (struct sbp2_device *)orb->cmd->device->host->hostdata; | |
980 | struct fw_unit *unit = sd->unit; | |
9ba136d0 | 981 | struct fw_device *device = fw_device(unit->device.parent); |
9ba136d0 | 982 | |
c781c06d KH |
983 | /* |
984 | * As for map_scatterlist, we need to fill in the high bits of | |
985 | * the data_descriptor pointer. | |
986 | */ | |
9ba136d0 KH |
987 | |
988 | orb->request_buffer_bus = | |
989 | dma_map_single(device->card->device, | |
990 | orb->cmd->request_buffer, | |
991 | orb->cmd->request_bufflen, | |
992 | orb->cmd->sc_data_direction); | |
95ffc5e3 KH |
993 | if (dma_mapping_error(orb->request_buffer_bus)) |
994 | return -ENOMEM; | |
995 | ||
9ba136d0 KH |
996 | orb->request.data_descriptor.high = sd->address_high; |
997 | orb->request.data_descriptor.low = orb->request_buffer_bus; | |
998 | orb->request.misc |= | |
a77754a7 | 999 | COMMAND_ORB_DATA_SIZE(orb->cmd->request_bufflen); |
95ffc5e3 KH |
1000 | |
1001 | return 0; | |
9ba136d0 KH |
1002 | } |
1003 | ||
1004 | /* SCSI stack integration */ | |
1005 | ||
1006 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |
1007 | { | |
ad85274f KH |
1008 | struct sbp2_device *sd = |
1009 | (struct sbp2_device *)cmd->device->host->hostdata; | |
1010 | struct fw_unit *unit = sd->unit; | |
9ba136d0 | 1011 | struct fw_device *device = fw_device(unit->device.parent); |
9ba136d0 KH |
1012 | struct sbp2_command_orb *orb; |
1013 | ||
c781c06d KH |
1014 | /* |
1015 | * Bidirectional commands are not yet implemented, and unknown | |
1016 | * transfer direction not handled. | |
1017 | */ | |
9ba136d0 KH |
1018 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
1019 | fw_error("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | |
e1b68c4d KH |
1020 | cmd->result = DID_ERROR << 16; |
1021 | done(cmd); | |
1022 | return 0; | |
9ba136d0 KH |
1023 | } |
1024 | ||
1025 | orb = kzalloc(sizeof *orb, GFP_ATOMIC); | |
1026 | if (orb == NULL) { | |
1027 | fw_notify("failed to alloc orb\n"); | |
82eff9db | 1028 | goto fail_alloc; |
9ba136d0 KH |
1029 | } |
1030 | ||
12f26aa1 KH |
1031 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
1032 | orb->base.rcode = -1; | |
9ba136d0 KH |
1033 | orb->base.request_bus = |
1034 | dma_map_single(device->card->device, &orb->request, | |
1035 | sizeof orb->request, DMA_TO_DEVICE); | |
82eff9db KH |
1036 | if (dma_mapping_error(orb->base.request_bus)) |
1037 | goto fail_mapping; | |
9ba136d0 KH |
1038 | |
1039 | orb->unit = unit; | |
1040 | orb->done = done; | |
1041 | orb->cmd = cmd; | |
1042 | ||
1043 | orb->request.next.high = SBP2_ORB_NULL; | |
1044 | orb->request.next.low = 0x0; | |
c781c06d KH |
1045 | /* |
1046 | * At speed 100 we can do 512 bytes per packet, at speed 200, | |
9ba136d0 KH |
1047 | * 1024 bytes per packet etc. The SBP-2 max_payload field |
1048 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
c781c06d KH |
1049 | * if we set this to max_speed + 7, we get the right value. |
1050 | */ | |
9ba136d0 | 1051 | orb->request.misc = |
a77754a7 KH |
1052 | COMMAND_ORB_MAX_PAYLOAD(device->node->max_speed + 7) | |
1053 | COMMAND_ORB_SPEED(device->node->max_speed) | | |
1054 | COMMAND_ORB_NOTIFY; | |
9ba136d0 KH |
1055 | |
1056 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
1057 | orb->request.misc |= | |
a77754a7 | 1058 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_FROM_MEDIA); |
9ba136d0 KH |
1059 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) |
1060 | orb->request.misc |= | |
a77754a7 | 1061 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA); |
9ba136d0 KH |
1062 | |
1063 | if (cmd->use_sg) { | |
95ffc5e3 KH |
1064 | if (sbp2_command_orb_map_scatterlist(orb) < 0) |
1065 | goto fail_map_payload; | |
9ba136d0 | 1066 | } else if (cmd->request_bufflen > SBP2_MAX_SG_ELEMENT_LENGTH) { |
c781c06d KH |
1067 | /* |
1068 | * FIXME: Need to split this into a sg list... but | |
9ba136d0 | 1069 | * could we get the scsi or blk layer to do that by |
c781c06d KH |
1070 | * reporting our max supported block size? |
1071 | */ | |
9ba136d0 | 1072 | fw_error("command > 64k\n"); |
95ffc5e3 | 1073 | goto fail_map_payload; |
9ba136d0 | 1074 | } else if (cmd->request_bufflen > 0) { |
95ffc5e3 KH |
1075 | if (sbp2_command_orb_map_buffer(orb) < 0) |
1076 | goto fail_map_payload; | |
9ba136d0 KH |
1077 | } |
1078 | ||
1079 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request); | |
1080 | ||
1081 | memset(orb->request.command_block, | |
1082 | 0, sizeof orb->request.command_block); | |
1083 | memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); | |
1084 | ||
1085 | orb->base.callback = complete_command_orb; | |
1086 | ||
1087 | sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation, | |
1088 | sd->command_block_agent_address + SBP2_ORB_POINTER); | |
1089 | ||
1090 | return 0; | |
82eff9db | 1091 | |
95ffc5e3 | 1092 | fail_map_payload: |
82eff9db KH |
1093 | dma_unmap_single(device->card->device, orb->base.request_bus, |
1094 | sizeof orb->request, DMA_TO_DEVICE); | |
1095 | fail_mapping: | |
1096 | kfree(orb); | |
1097 | fail_alloc: | |
e1b68c4d | 1098 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 KH |
1099 | } |
1100 | ||
cfb01381 SR |
1101 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1102 | { | |
ad85274f | 1103 | struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata; |
cfb01381 SR |
1104 | |
1105 | sdev->allow_restart = 1; | |
1106 | ||
1107 | if (sd->workarounds & SBP2_WORKAROUND_INQUIRY_36) | |
1108 | sdev->inquiry_len = 36; | |
1109 | return 0; | |
1110 | } | |
1111 | ||
9ba136d0 KH |
1112 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1113 | { | |
ad85274f KH |
1114 | struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata; |
1115 | struct fw_unit *unit = sd->unit; | |
9ba136d0 | 1116 | |
cfb01381 SR |
1117 | sdev->use_10_for_rw = 1; |
1118 | ||
1119 | if (sdev->type == TYPE_ROM) | |
1120 | sdev->use_10_for_ms = 1; | |
9ba136d0 KH |
1121 | if (sdev->type == TYPE_DISK && |
1122 | sd->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
1123 | sdev->skip_ms_page_8 = 1; | |
1124 | if (sd->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) { | |
1125 | fw_notify("setting fix_capacity for %s\n", unit->device.bus_id); | |
1126 | sdev->fix_capacity = 1; | |
1127 | } | |
1128 | ||
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | /* | |
1133 | * Called by scsi stack when something has really gone wrong. Usually | |
1134 | * called when a command has timed-out for some reason. | |
1135 | */ | |
1136 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1137 | { | |
ad85274f KH |
1138 | struct sbp2_device *sd = |
1139 | (struct sbp2_device *)cmd->device->host->hostdata; | |
1140 | struct fw_unit *unit = sd->unit; | |
9ba136d0 KH |
1141 | |
1142 | fw_notify("sbp2_scsi_abort\n"); | |
0fc7d6e4 | 1143 | sbp2_agent_reset(unit); |
9ba136d0 KH |
1144 | sbp2_cancel_orbs(unit); |
1145 | ||
1146 | return SUCCESS; | |
1147 | } | |
1148 | ||
1149 | static struct scsi_host_template scsi_driver_template = { | |
1150 | .module = THIS_MODULE, | |
1151 | .name = "SBP-2 IEEE-1394", | |
1152 | .proc_name = (char *)sbp2_driver_name, | |
1153 | .queuecommand = sbp2_scsi_queuecommand, | |
cfb01381 | 1154 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1155 | .slave_configure = sbp2_scsi_slave_configure, |
1156 | .eh_abort_handler = sbp2_scsi_abort, | |
1157 | .this_id = -1, | |
1158 | .sg_tablesize = SG_ALL, | |
1159 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1160 | .cmd_per_lun = 1, |
1161 | .can_queue = 1, | |
9ba136d0 KH |
1162 | }; |
1163 | ||
9ba136d0 KH |
1164 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1165 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1166 | MODULE_LICENSE("GPL"); | |
1167 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1168 | ||
1e4c7b0d OH |
1169 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1170 | #ifndef CONFIG_IEEE1394_SBP2_MODULE | |
1171 | MODULE_ALIAS("sbp2"); | |
1172 | #endif | |
1173 | ||
9ba136d0 KH |
1174 | static int __init sbp2_init(void) |
1175 | { | |
1176 | return driver_register(&sbp2_driver.driver); | |
1177 | } | |
1178 | ||
1179 | static void __exit sbp2_cleanup(void) | |
1180 | { | |
1181 | driver_unregister(&sbp2_driver.driver); | |
1182 | } | |
1183 | ||
1184 | module_init(sbp2_init); | |
1185 | module_exit(sbp2_cleanup); |