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; | |
9ba136d0 KH |
210 | }; |
211 | ||
212 | /* | |
213 | * List of devices with known bugs. | |
214 | * | |
215 | * The firmware_revision field, masked with 0xffff00, is the best | |
216 | * indicator for the type of bridge chip of a device. It yields a few | |
217 | * false positives but this did not break correctly behaving devices | |
218 | * so far. We use ~0 as a wildcard, since the 24 bit values we get | |
219 | * from the config rom can never match that. | |
220 | */ | |
221 | static const struct { | |
222 | u32 firmware_revision; | |
223 | u32 model; | |
224 | unsigned workarounds; | |
225 | } sbp2_workarounds_table[] = { | |
226 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
227 | .firmware_revision = 0x002800, | |
228 | .model = 0x001010, | |
229 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
230 | SBP2_WORKAROUND_MODE_SENSE_8, | |
231 | }, | |
232 | /* Initio bridges, actually only needed for some older ones */ { | |
233 | .firmware_revision = 0x000200, | |
234 | .model = ~0, | |
235 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
236 | }, | |
237 | /* Symbios bridge */ { | |
238 | .firmware_revision = 0xa0b800, | |
239 | .model = ~0, | |
240 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
241 | }, | |
c781c06d KH |
242 | |
243 | /* | |
244 | * There are iPods (2nd gen, 3rd gen) with model_id == 0, but | |
9ba136d0 KH |
245 | * these iPods do not feature the read_capacity bug according |
246 | * to one report. Read_capacity behaviour as well as model_id | |
c781c06d KH |
247 | * could change due to Apple-supplied firmware updates though. |
248 | */ | |
249 | ||
9ba136d0 KH |
250 | /* iPod 4th generation. */ { |
251 | .firmware_revision = 0x0a2700, | |
252 | .model = 0x000021, | |
253 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
254 | }, | |
255 | /* iPod mini */ { | |
256 | .firmware_revision = 0x0a2700, | |
257 | .model = 0x000023, | |
258 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
259 | }, | |
260 | /* iPod Photo */ { | |
261 | .firmware_revision = 0x0a2700, | |
262 | .model = 0x00007e, | |
263 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
264 | } | |
265 | }; | |
266 | ||
267 | static void | |
268 | sbp2_status_write(struct fw_card *card, struct fw_request *request, | |
269 | int tcode, int destination, int source, | |
270 | int generation, int speed, | |
271 | unsigned long long offset, | |
272 | void *payload, size_t length, void *callback_data) | |
273 | { | |
274 | struct sbp2_device *sd = callback_data; | |
275 | struct sbp2_orb *orb; | |
276 | struct sbp2_status status; | |
277 | size_t header_size; | |
278 | unsigned long flags; | |
279 | ||
280 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
2d826cc5 | 281 | length == 0 || length > sizeof(status)) { |
9ba136d0 KH |
282 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
283 | return; | |
284 | } | |
285 | ||
286 | header_size = min(length, 2 * sizeof(u32)); | |
287 | fw_memcpy_from_be32(&status, payload, header_size); | |
288 | if (length > header_size) | |
289 | memcpy(status.data, payload + 8, length - header_size); | |
a77754a7 | 290 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
9ba136d0 KH |
291 | fw_notify("non-orb related status write, not handled\n"); |
292 | fw_send_response(card, request, RCODE_COMPLETE); | |
293 | return; | |
294 | } | |
295 | ||
296 | /* Lookup the orb corresponding to this status write. */ | |
297 | spin_lock_irqsave(&card->lock, flags); | |
298 | list_for_each_entry(orb, &sd->orb_list, link) { | |
a77754a7 KH |
299 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
300 | STATUS_GET_ORB_LOW(status) == orb->request_bus && | |
12f26aa1 | 301 | orb->rcode == RCODE_COMPLETE) { |
9ba136d0 KH |
302 | list_del(&orb->link); |
303 | break; | |
304 | } | |
305 | } | |
306 | spin_unlock_irqrestore(&card->lock, flags); | |
307 | ||
308 | if (&orb->link != &sd->orb_list) | |
309 | orb->callback(orb, &status); | |
310 | else | |
311 | fw_error("status write for unknown orb\n"); | |
312 | ||
313 | fw_send_response(card, request, RCODE_COMPLETE); | |
314 | } | |
315 | ||
316 | static void | |
317 | complete_transaction(struct fw_card *card, int rcode, | |
318 | void *payload, size_t length, void *data) | |
319 | { | |
320 | struct sbp2_orb *orb = data; | |
321 | unsigned long flags; | |
322 | ||
323 | orb->rcode = rcode; | |
324 | if (rcode != RCODE_COMPLETE) { | |
325 | spin_lock_irqsave(&card->lock, flags); | |
326 | list_del(&orb->link); | |
327 | spin_unlock_irqrestore(&card->lock, flags); | |
328 | orb->callback(orb, NULL); | |
329 | } | |
330 | } | |
331 | ||
332 | static void | |
333 | sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, | |
334 | int node_id, int generation, u64 offset) | |
335 | { | |
336 | struct fw_device *device = fw_device(unit->device.parent); | |
337 | struct sbp2_device *sd = unit->device.driver_data; | |
338 | unsigned long flags; | |
339 | ||
340 | orb->pointer.high = 0; | |
341 | orb->pointer.low = orb->request_bus; | |
2d826cc5 | 342 | fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer)); |
9ba136d0 KH |
343 | |
344 | spin_lock_irqsave(&device->card->lock, flags); | |
345 | list_add_tail(&orb->link, &sd->orb_list); | |
346 | spin_unlock_irqrestore(&device->card->lock, flags); | |
347 | ||
348 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, | |
f1397490 | 349 | node_id, generation, device->max_speed, offset, |
2d826cc5 | 350 | &orb->pointer, sizeof(orb->pointer), |
9ba136d0 KH |
351 | complete_transaction, orb); |
352 | } | |
353 | ||
2aaad97b | 354 | static int sbp2_cancel_orbs(struct fw_unit *unit) |
9ba136d0 KH |
355 | { |
356 | struct fw_device *device = fw_device(unit->device.parent); | |
357 | struct sbp2_device *sd = unit->device.driver_data; | |
358 | struct sbp2_orb *orb, *next; | |
359 | struct list_head list; | |
360 | unsigned long flags; | |
2aaad97b | 361 | int retval = -ENOENT; |
9ba136d0 KH |
362 | |
363 | INIT_LIST_HEAD(&list); | |
364 | spin_lock_irqsave(&device->card->lock, flags); | |
365 | list_splice_init(&sd->orb_list, &list); | |
366 | spin_unlock_irqrestore(&device->card->lock, flags); | |
367 | ||
368 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 369 | retval = 0; |
730c32f5 KH |
370 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
371 | continue; | |
372 | ||
9ba136d0 KH |
373 | orb->rcode = RCODE_CANCELLED; |
374 | orb->callback(orb, NULL); | |
375 | } | |
9ba136d0 | 376 | |
2aaad97b | 377 | return retval; |
1d3d52c5 KH |
378 | } |
379 | ||
9ba136d0 KH |
380 | static void |
381 | complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
382 | { | |
383 | struct sbp2_management_orb *orb = | |
384 | (struct sbp2_management_orb *)base_orb; | |
385 | ||
386 | if (status) | |
2d826cc5 | 387 | memcpy(&orb->status, status, sizeof(*status)); |
9ba136d0 KH |
388 | complete(&orb->done); |
389 | } | |
390 | ||
391 | static int | |
392 | sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, | |
393 | int function, int lun, void *response) | |
394 | { | |
395 | struct fw_device *device = fw_device(unit->device.parent); | |
396 | struct sbp2_device *sd = unit->device.driver_data; | |
397 | struct sbp2_management_orb *orb; | |
9ba136d0 KH |
398 | int retval = -ENOMEM; |
399 | ||
2d826cc5 | 400 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
401 | if (orb == NULL) |
402 | return -ENOMEM; | |
403 | ||
c781c06d KH |
404 | /* |
405 | * The sbp2 device is going to send a block read request to | |
406 | * read out the request from host memory, so map it for dma. | |
407 | */ | |
9ba136d0 KH |
408 | orb->base.request_bus = |
409 | dma_map_single(device->card->device, &orb->request, | |
2d826cc5 | 410 | sizeof(orb->request), DMA_TO_DEVICE); |
82eff9db | 411 | if (dma_mapping_error(orb->base.request_bus)) |
9ba136d0 KH |
412 | goto out; |
413 | ||
414 | orb->response_bus = | |
415 | dma_map_single(device->card->device, &orb->response, | |
2d826cc5 | 416 | sizeof(orb->response), DMA_FROM_DEVICE); |
82eff9db | 417 | if (dma_mapping_error(orb->response_bus)) |
9ba136d0 KH |
418 | goto out; |
419 | ||
420 | orb->request.response.high = 0; | |
421 | orb->request.response.low = orb->response_bus; | |
422 | ||
423 | orb->request.misc = | |
a77754a7 KH |
424 | MANAGEMENT_ORB_NOTIFY | |
425 | MANAGEMENT_ORB_FUNCTION(function) | | |
426 | MANAGEMENT_ORB_LUN(lun); | |
9ba136d0 | 427 | orb->request.length = |
2d826cc5 | 428 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)); |
9ba136d0 KH |
429 | |
430 | orb->request.status_fifo.high = sd->address_handler.offset >> 32; | |
431 | orb->request.status_fifo.low = sd->address_handler.offset; | |
432 | ||
c781c06d KH |
433 | /* |
434 | * FIXME: Yeah, ok this isn't elegant, we hardwire exclusive | |
9ba136d0 | 435 | * login and 1 second reconnect time. The reconnect setting |
c781c06d KH |
436 | * is probably fine, but the exclusive login should be an option. |
437 | */ | |
9ba136d0 KH |
438 | if (function == SBP2_LOGIN_REQUEST) { |
439 | orb->request.misc |= | |
a77754a7 KH |
440 | MANAGEMENT_ORB_EXCLUSIVE | |
441 | MANAGEMENT_ORB_RECONNECT(0); | |
9ba136d0 KH |
442 | } |
443 | ||
2d826cc5 | 444 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); |
9ba136d0 KH |
445 | |
446 | init_completion(&orb->done); | |
447 | orb->base.callback = complete_management_orb; | |
2aaad97b | 448 | |
9ba136d0 KH |
449 | sbp2_send_orb(&orb->base, unit, |
450 | node_id, generation, sd->management_agent_address); | |
451 | ||
2aaad97b KH |
452 | wait_for_completion_timeout(&orb->done, |
453 | msecs_to_jiffies(SBP2_ORB_TIMEOUT)); | |
9ba136d0 | 454 | |
9ba136d0 | 455 | retval = -EIO; |
2aaad97b KH |
456 | if (sbp2_cancel_orbs(unit) == 0) { |
457 | fw_error("orb reply timed out, rcode=0x%02x\n", | |
9ba136d0 KH |
458 | orb->base.rcode); |
459 | goto out; | |
460 | } | |
461 | ||
2aaad97b KH |
462 | if (orb->base.rcode != RCODE_COMPLETE) { |
463 | fw_error("management write failed, rcode 0x%02x\n", | |
9ba136d0 KH |
464 | orb->base.rcode); |
465 | goto out; | |
466 | } | |
467 | ||
a77754a7 KH |
468 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
469 | STATUS_GET_SBP_STATUS(orb->status) != 0) { | |
9ba136d0 | 470 | fw_error("error status: %d:%d\n", |
a77754a7 KH |
471 | STATUS_GET_RESPONSE(orb->status), |
472 | STATUS_GET_SBP_STATUS(orb->status)); | |
9ba136d0 KH |
473 | goto out; |
474 | } | |
475 | ||
476 | retval = 0; | |
477 | out: | |
478 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 479 | sizeof(orb->request), DMA_TO_DEVICE); |
9ba136d0 | 480 | dma_unmap_single(device->card->device, orb->response_bus, |
2d826cc5 | 481 | sizeof(orb->response), DMA_FROM_DEVICE); |
9ba136d0 KH |
482 | |
483 | if (response) | |
484 | fw_memcpy_from_be32(response, | |
2d826cc5 | 485 | orb->response, sizeof(orb->response)); |
9ba136d0 KH |
486 | kfree(orb); |
487 | ||
488 | return retval; | |
489 | } | |
490 | ||
491 | static void | |
492 | complete_agent_reset_write(struct fw_card *card, int rcode, | |
493 | void *payload, size_t length, void *data) | |
494 | { | |
495 | struct fw_transaction *t = data; | |
496 | ||
9ba136d0 KH |
497 | kfree(t); |
498 | } | |
499 | ||
500 | static int sbp2_agent_reset(struct fw_unit *unit) | |
501 | { | |
502 | struct fw_device *device = fw_device(unit->device.parent); | |
503 | struct sbp2_device *sd = unit->device.driver_data; | |
504 | struct fw_transaction *t; | |
505 | static u32 zero; | |
506 | ||
2d826cc5 | 507 | t = kzalloc(sizeof(*t), GFP_ATOMIC); |
9ba136d0 KH |
508 | if (t == NULL) |
509 | return -ENOMEM; | |
510 | ||
511 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
907293d7 | 512 | sd->node_id, sd->generation, SCODE_400, |
9ba136d0 | 513 | sd->command_block_agent_address + SBP2_AGENT_RESET, |
2d826cc5 | 514 | &zero, sizeof(zero), complete_agent_reset_write, t); |
9ba136d0 KH |
515 | |
516 | return 0; | |
517 | } | |
518 | ||
7f37c426 | 519 | static void sbp2_reconnect(struct work_struct *work); |
ad85274f | 520 | static struct scsi_host_template scsi_driver_template; |
7f37c426 | 521 | |
b3d6e151 KH |
522 | static void |
523 | release_sbp2_device(struct kref *kref) | |
524 | { | |
525 | struct sbp2_device *sd = container_of(kref, struct sbp2_device, kref); | |
ad85274f KH |
526 | struct Scsi_Host *host = |
527 | container_of((void *)sd, struct Scsi_Host, hostdata[0]); | |
b3d6e151 KH |
528 | |
529 | sbp2_send_management_orb(sd->unit, sd->node_id, sd->generation, | |
530 | SBP2_LOGOUT_REQUEST, sd->login_id, NULL); | |
531 | ||
ad85274f | 532 | scsi_remove_host(host); |
b3d6e151 KH |
533 | fw_core_remove_address_handler(&sd->address_handler); |
534 | fw_notify("removed sbp2 unit %s\n", sd->unit->device.bus_id); | |
535 | put_device(&sd->unit->device); | |
ad85274f | 536 | scsi_host_put(host); |
b3d6e151 KH |
537 | } |
538 | ||
7f37c426 KH |
539 | static void sbp2_login(struct work_struct *work) |
540 | { | |
541 | struct sbp2_device *sd = | |
542 | container_of(work, struct sbp2_device, work.work); | |
ad85274f KH |
543 | struct Scsi_Host *host = |
544 | container_of((void *)sd, struct Scsi_Host, hostdata[0]); | |
7f37c426 KH |
545 | struct fw_unit *unit = sd->unit; |
546 | struct fw_device *device = fw_device(unit->device.parent); | |
547 | struct sbp2_login_response response; | |
548 | int generation, node_id, local_node_id, lun, retval; | |
549 | ||
550 | /* FIXME: Make this work for multi-lun devices. */ | |
551 | lun = 0; | |
552 | ||
553 | generation = device->card->generation; | |
554 | node_id = device->node->node_id; | |
555 | local_node_id = device->card->local_node->node_id; | |
556 | ||
557 | if (sbp2_send_management_orb(unit, node_id, generation, | |
558 | SBP2_LOGIN_REQUEST, lun, &response) < 0) { | |
559 | if (sd->retries++ < 5) { | |
7f37c426 KH |
560 | schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); |
561 | } else { | |
562 | fw_error("failed to login to %s\n", | |
563 | unit->device.bus_id); | |
b3d6e151 | 564 | kref_put(&sd->kref, release_sbp2_device); |
7f37c426 KH |
565 | } |
566 | return; | |
567 | } | |
568 | ||
569 | sd->generation = generation; | |
570 | sd->node_id = node_id; | |
571 | sd->address_high = local_node_id << 16; | |
572 | ||
573 | /* Get command block agent offset and login id. */ | |
574 | sd->command_block_agent_address = | |
5c5539d8 | 575 | ((u64) (response.command_block_agent.high & 0xffff) << 32) | |
7f37c426 | 576 | response.command_block_agent.low; |
a77754a7 | 577 | sd->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response); |
7f37c426 | 578 | |
5c5539d8 KH |
579 | fw_notify("logged in to sbp2 unit %s (%d retries)\n", |
580 | unit->device.bus_id, sd->retries); | |
581 | fw_notify(" - management_agent_address: 0x%012llx\n", | |
7f37c426 KH |
582 | (unsigned long long) sd->management_agent_address); |
583 | fw_notify(" - command_block_agent_address: 0x%012llx\n", | |
584 | (unsigned long long) sd->command_block_agent_address); | |
5c5539d8 | 585 | fw_notify(" - status write address: 0x%012llx\n", |
7f37c426 KH |
586 | (unsigned long long) sd->address_handler.offset); |
587 | ||
588 | #if 0 | |
589 | /* FIXME: The linux1394 sbp2 does this last step. */ | |
590 | sbp2_set_busy_timeout(scsi_id); | |
591 | #endif | |
592 | ||
1da0c93b | 593 | PREPARE_DELAYED_WORK(&sd->work, sbp2_reconnect); |
7f37c426 KH |
594 | sbp2_agent_reset(unit); |
595 | ||
ad85274f KH |
596 | /* FIXME: Loop over luns here. */ |
597 | lun = 0; | |
598 | retval = scsi_add_device(host, 0, 0, lun); | |
7f37c426 KH |
599 | if (retval < 0) { |
600 | sbp2_send_management_orb(unit, sd->node_id, sd->generation, | |
601 | SBP2_LOGOUT_REQUEST, sd->login_id, | |
602 | NULL); | |
c781c06d KH |
603 | /* |
604 | * Set this back to sbp2_login so we fall back and | |
605 | * retry login on bus reset. | |
606 | */ | |
1da0c93b | 607 | PREPARE_DELAYED_WORK(&sd->work, sbp2_login); |
7f37c426 | 608 | } |
b3d6e151 | 609 | kref_put(&sd->kref, release_sbp2_device); |
7f37c426 | 610 | } |
9ba136d0 KH |
611 | |
612 | static int sbp2_probe(struct device *dev) | |
613 | { | |
614 | struct fw_unit *unit = fw_unit(dev); | |
615 | struct fw_device *device = fw_device(unit->device.parent); | |
616 | struct sbp2_device *sd; | |
617 | struct fw_csr_iterator ci; | |
ad85274f KH |
618 | struct Scsi_Host *host; |
619 | int i, key, value, err; | |
9ba136d0 KH |
620 | u32 model, firmware_revision; |
621 | ||
ad85274f KH |
622 | err = -ENOMEM; |
623 | host = scsi_host_alloc(&scsi_driver_template, sizeof(*sd)); | |
624 | if (host == NULL) | |
625 | goto fail; | |
9ba136d0 | 626 | |
ad85274f | 627 | sd = (struct sbp2_device *) host->hostdata; |
9ba136d0 KH |
628 | unit->device.driver_data = sd; |
629 | sd->unit = unit; | |
630 | INIT_LIST_HEAD(&sd->orb_list); | |
b3d6e151 | 631 | kref_init(&sd->kref); |
9ba136d0 KH |
632 | |
633 | sd->address_handler.length = 0x100; | |
634 | sd->address_handler.address_callback = sbp2_status_write; | |
635 | sd->address_handler.callback_data = sd; | |
636 | ||
ad85274f KH |
637 | err = fw_core_add_address_handler(&sd->address_handler, |
638 | &fw_high_memory_region); | |
639 | if (err < 0) | |
640 | goto fail_host; | |
9ba136d0 | 641 | |
ad85274f KH |
642 | err = fw_device_enable_phys_dma(device); |
643 | if (err < 0) | |
644 | goto fail_address_handler; | |
645 | ||
646 | err = scsi_add_host(host, &unit->device); | |
647 | if (err < 0) | |
648 | goto fail_address_handler; | |
9ba136d0 | 649 | |
c781c06d KH |
650 | /* |
651 | * Scan unit directory to get management agent address, | |
9ba136d0 | 652 | * firmware revison and model. Initialize firmware_revision |
c781c06d KH |
653 | * and model to values that wont match anything in our table. |
654 | */ | |
9ba136d0 KH |
655 | firmware_revision = 0xff000000; |
656 | model = 0xff000000; | |
657 | fw_csr_iterator_init(&ci, unit->directory); | |
658 | while (fw_csr_iterator_next(&ci, &key, &value)) { | |
659 | switch (key) { | |
660 | case CSR_DEPENDENT_INFO | CSR_OFFSET: | |
661 | sd->management_agent_address = | |
662 | 0xfffff0000000ULL + 4 * value; | |
663 | break; | |
664 | case SBP2_FIRMWARE_REVISION: | |
665 | firmware_revision = value; | |
666 | break; | |
667 | case CSR_MODEL: | |
668 | model = value; | |
669 | break; | |
670 | } | |
671 | } | |
672 | ||
673 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
674 | if (sbp2_workarounds_table[i].firmware_revision != | |
675 | (firmware_revision & 0xffffff00)) | |
676 | continue; | |
677 | if (sbp2_workarounds_table[i].model != model && | |
678 | sbp2_workarounds_table[i].model != ~0) | |
679 | continue; | |
680 | sd->workarounds |= sbp2_workarounds_table[i].workarounds; | |
681 | break; | |
682 | } | |
683 | ||
684 | if (sd->workarounds) | |
685 | fw_notify("Workarounds for node %s: 0x%x " | |
686 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", | |
687 | unit->device.bus_id, | |
688 | sd->workarounds, firmware_revision, model); | |
689 | ||
b3d6e151 KH |
690 | get_device(&unit->device); |
691 | ||
c781c06d KH |
692 | /* |
693 | * We schedule work to do the login so we can easily | |
b3d6e151 | 694 | * reschedule retries. Always get the ref before scheduling |
c781c06d KH |
695 | * work. |
696 | */ | |
7f37c426 | 697 | INIT_DELAYED_WORK(&sd->work, sbp2_login); |
b3d6e151 KH |
698 | if (schedule_delayed_work(&sd->work, 0)) |
699 | kref_get(&sd->kref); | |
9ba136d0 KH |
700 | |
701 | return 0; | |
ad85274f KH |
702 | |
703 | fail_address_handler: | |
704 | fw_core_remove_address_handler(&sd->address_handler); | |
705 | fail_host: | |
706 | scsi_host_put(host); | |
707 | fail: | |
708 | return err; | |
9ba136d0 KH |
709 | } |
710 | ||
711 | static int sbp2_remove(struct device *dev) | |
712 | { | |
713 | struct fw_unit *unit = fw_unit(dev); | |
714 | struct sbp2_device *sd = unit->device.driver_data; | |
715 | ||
b3d6e151 | 716 | kref_put(&sd->kref, release_sbp2_device); |
9ba136d0 KH |
717 | |
718 | return 0; | |
719 | } | |
720 | ||
721 | static void sbp2_reconnect(struct work_struct *work) | |
722 | { | |
7f37c426 KH |
723 | struct sbp2_device *sd = |
724 | container_of(work, struct sbp2_device, work.work); | |
9ba136d0 KH |
725 | struct fw_unit *unit = sd->unit; |
726 | struct fw_device *device = fw_device(unit->device.parent); | |
727 | int generation, node_id, local_node_id; | |
728 | ||
9ba136d0 KH |
729 | generation = device->card->generation; |
730 | node_id = device->node->node_id; | |
731 | local_node_id = device->card->local_node->node_id; | |
732 | ||
7f37c426 KH |
733 | if (sbp2_send_management_orb(unit, node_id, generation, |
734 | SBP2_RECONNECT_REQUEST, | |
735 | sd->login_id, NULL) < 0) { | |
5c5539d8 | 736 | if (sd->retries++ >= 5) { |
7f37c426 KH |
737 | fw_error("failed to reconnect to %s\n", |
738 | unit->device.bus_id); | |
739 | /* Fall back and try to log in again. */ | |
740 | sd->retries = 0; | |
1da0c93b | 741 | PREPARE_DELAYED_WORK(&sd->work, sbp2_login); |
7f37c426 KH |
742 | } |
743 | schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); | |
744 | return; | |
745 | } | |
9ba136d0 KH |
746 | |
747 | sd->generation = generation; | |
748 | sd->node_id = node_id; | |
907293d7 | 749 | sd->address_high = local_node_id << 16; |
7f37c426 | 750 | |
5c5539d8 KH |
751 | fw_notify("reconnected to unit %s (%d retries)\n", |
752 | unit->device.bus_id, sd->retries); | |
7f37c426 KH |
753 | sbp2_agent_reset(unit); |
754 | sbp2_cancel_orbs(unit); | |
b3d6e151 | 755 | kref_put(&sd->kref, release_sbp2_device); |
9ba136d0 KH |
756 | } |
757 | ||
758 | static void sbp2_update(struct fw_unit *unit) | |
759 | { | |
760 | struct fw_device *device = fw_device(unit->device.parent); | |
761 | struct sbp2_device *sd = unit->device.driver_data; | |
762 | ||
7f37c426 | 763 | sd->retries = 0; |
9ba136d0 | 764 | fw_device_enable_phys_dma(device); |
b3d6e151 KH |
765 | if (schedule_delayed_work(&sd->work, 0)) |
766 | kref_get(&sd->kref); | |
9ba136d0 KH |
767 | } |
768 | ||
769 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
770 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
771 | ||
21ebcd12 | 772 | static const struct fw_device_id sbp2_id_table[] = { |
9ba136d0 KH |
773 | { |
774 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, | |
775 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, | |
5af4e5ea | 776 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
777 | }, |
778 | { } | |
779 | }; | |
780 | ||
781 | static struct fw_driver sbp2_driver = { | |
782 | .driver = { | |
783 | .owner = THIS_MODULE, | |
784 | .name = sbp2_driver_name, | |
785 | .bus = &fw_bus_type, | |
786 | .probe = sbp2_probe, | |
787 | .remove = sbp2_remove, | |
788 | }, | |
789 | .update = sbp2_update, | |
790 | .id_table = sbp2_id_table, | |
791 | }; | |
792 | ||
fbb5423c KH |
793 | static unsigned int |
794 | sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) | |
9ba136d0 | 795 | { |
fbb5423c KH |
796 | int sam_status; |
797 | ||
9ba136d0 KH |
798 | sense_data[0] = 0x70; |
799 | sense_data[1] = 0x0; | |
800 | sense_data[2] = sbp2_status[1]; | |
801 | sense_data[3] = sbp2_status[4]; | |
802 | sense_data[4] = sbp2_status[5]; | |
803 | sense_data[5] = sbp2_status[6]; | |
804 | sense_data[6] = sbp2_status[7]; | |
805 | sense_data[7] = 10; | |
806 | sense_data[8] = sbp2_status[8]; | |
807 | sense_data[9] = sbp2_status[9]; | |
808 | sense_data[10] = sbp2_status[10]; | |
809 | sense_data[11] = sbp2_status[11]; | |
810 | sense_data[12] = sbp2_status[2]; | |
811 | sense_data[13] = sbp2_status[3]; | |
812 | sense_data[14] = sbp2_status[12]; | |
813 | sense_data[15] = sbp2_status[13]; | |
814 | ||
fbb5423c | 815 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 816 | |
fbb5423c KH |
817 | switch (sam_status) { |
818 | case SAM_STAT_GOOD: | |
9ba136d0 | 819 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 820 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 821 | case SAM_STAT_BUSY: |
9ba136d0 KH |
822 | case SAM_STAT_RESERVATION_CONFLICT: |
823 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
824 | return DID_OK << 16 | sam_status; |
825 | ||
9ba136d0 | 826 | default: |
fbb5423c | 827 | return DID_ERROR << 16; |
9ba136d0 KH |
828 | } |
829 | } | |
830 | ||
831 | static void | |
832 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
833 | { | |
834 | struct sbp2_command_orb *orb = (struct sbp2_command_orb *)base_orb; | |
835 | struct fw_unit *unit = orb->unit; | |
836 | struct fw_device *device = fw_device(unit->device.parent); | |
837 | struct scatterlist *sg; | |
838 | int result; | |
839 | ||
840 | if (status != NULL) { | |
a77754a7 | 841 | if (STATUS_GET_DEAD(*status)) |
9ba136d0 | 842 | sbp2_agent_reset(unit); |
9ba136d0 | 843 | |
a77754a7 | 844 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 845 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 846 | result = DID_OK << 16; |
9ba136d0 KH |
847 | break; |
848 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 849 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
850 | break; |
851 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
852 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
853 | default: | |
fbb5423c | 854 | result = DID_ERROR << 16; |
9ba136d0 KH |
855 | break; |
856 | } | |
857 | ||
a77754a7 KH |
858 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
859 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
860 | orb->cmd->sense_buffer); |
861 | } else { | |
c781c06d KH |
862 | /* |
863 | * If the orb completes with status == NULL, something | |
9ba136d0 | 864 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
865 | * or when sending the write (less likely). |
866 | */ | |
fbb5423c | 867 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
868 | } |
869 | ||
870 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 871 | sizeof(orb->request), DMA_TO_DEVICE); |
9ba136d0 KH |
872 | |
873 | if (orb->cmd->use_sg > 0) { | |
874 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
875 | dma_unmap_sg(device->card->device, sg, orb->cmd->use_sg, | |
876 | orb->cmd->sc_data_direction); | |
877 | } | |
878 | ||
879 | if (orb->page_table_bus != 0) | |
880 | dma_unmap_single(device->card->device, orb->page_table_bus, | |
2d826cc5 | 881 | sizeof(orb->page_table_bus), DMA_TO_DEVICE); |
9ba136d0 | 882 | |
fbb5423c | 883 | orb->cmd->result = result; |
9ba136d0 | 884 | orb->done(orb->cmd); |
9ba136d0 KH |
885 | kfree(orb); |
886 | } | |
887 | ||
95ffc5e3 | 888 | static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) |
9ba136d0 | 889 | { |
ad85274f KH |
890 | struct sbp2_device *sd = |
891 | (struct sbp2_device *)orb->cmd->device->host->hostdata; | |
892 | struct fw_unit *unit = sd->unit; | |
9ba136d0 | 893 | struct fw_device *device = fw_device(unit->device.parent); |
9ba136d0 KH |
894 | struct scatterlist *sg; |
895 | int sg_len, l, i, j, count; | |
896 | size_t size; | |
897 | dma_addr_t sg_addr; | |
898 | ||
899 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
900 | count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg, | |
901 | orb->cmd->sc_data_direction); | |
95ffc5e3 KH |
902 | if (count == 0) |
903 | goto fail; | |
9ba136d0 | 904 | |
c781c06d KH |
905 | /* |
906 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
907 | * the scatter list by converting it to an immediate block |
908 | * request. This is also a workaround for broken devices such | |
909 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
910 | * tables. |
911 | */ | |
9ba136d0 KH |
912 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { |
913 | orb->request.data_descriptor.high = sd->address_high; | |
914 | orb->request.data_descriptor.low = sg_dma_address(sg); | |
915 | orb->request.misc |= | |
a77754a7 | 916 | COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)); |
95ffc5e3 | 917 | return 0; |
9ba136d0 KH |
918 | } |
919 | ||
c781c06d KH |
920 | /* |
921 | * Convert the scatterlist to an sbp2 page table. If any | |
36abb3b1 KHSR |
922 | * scatterlist entries are too big for sbp2, we split them as we |
923 | * go. Even if we ask the block I/O layer to not give us sg | |
924 | * elements larger than 65535 bytes, some IOMMUs may merge sg elements | |
925 | * during DMA mapping, and Linux currently doesn't prevent this. | |
c781c06d | 926 | */ |
9ba136d0 KH |
927 | for (i = 0, j = 0; i < count; i++) { |
928 | sg_len = sg_dma_len(sg + i); | |
929 | sg_addr = sg_dma_address(sg + i); | |
930 | while (sg_len) { | |
931 | l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH); | |
932 | orb->page_table[j].low = sg_addr; | |
933 | orb->page_table[j].high = (l << 16); | |
934 | sg_addr += l; | |
935 | sg_len -= l; | |
936 | j++; | |
937 | } | |
938 | } | |
939 | ||
2d826cc5 | 940 | size = sizeof(orb->page_table[0]) * j; |
9ba136d0 | 941 | |
c781c06d KH |
942 | /* |
943 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
944 | * to fill in the node ID part of the address. All other |
945 | * pointers assume that the data referenced reside on the | |
946 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
947 | * on other nodes so we need to put our ID in descriptor.high. |
948 | */ | |
9ba136d0 KH |
949 | |
950 | orb->page_table_bus = | |
951 | dma_map_single(device->card->device, orb->page_table, | |
952 | size, DMA_TO_DEVICE); | |
95ffc5e3 KH |
953 | if (dma_mapping_error(orb->page_table_bus)) |
954 | goto fail_page_table; | |
9ba136d0 KH |
955 | orb->request.data_descriptor.high = sd->address_high; |
956 | orb->request.data_descriptor.low = orb->page_table_bus; | |
957 | orb->request.misc |= | |
a77754a7 KH |
958 | COMMAND_ORB_PAGE_TABLE_PRESENT | |
959 | COMMAND_ORB_DATA_SIZE(j); | |
9ba136d0 KH |
960 | |
961 | fw_memcpy_to_be32(orb->page_table, orb->page_table, size); | |
95ffc5e3 KH |
962 | |
963 | return 0; | |
964 | ||
965 | fail_page_table: | |
966 | dma_unmap_sg(device->card->device, sg, orb->cmd->use_sg, | |
967 | orb->cmd->sc_data_direction); | |
968 | fail: | |
969 | return -ENOMEM; | |
9ba136d0 KH |
970 | } |
971 | ||
9ba136d0 KH |
972 | /* SCSI stack integration */ |
973 | ||
974 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |
975 | { | |
ad85274f KH |
976 | struct sbp2_device *sd = |
977 | (struct sbp2_device *)cmd->device->host->hostdata; | |
978 | struct fw_unit *unit = sd->unit; | |
9ba136d0 | 979 | struct fw_device *device = fw_device(unit->device.parent); |
9ba136d0 KH |
980 | struct sbp2_command_orb *orb; |
981 | ||
c781c06d KH |
982 | /* |
983 | * Bidirectional commands are not yet implemented, and unknown | |
984 | * transfer direction not handled. | |
985 | */ | |
9ba136d0 | 986 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
8a8cea27 | 987 | fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n"); |
e1b68c4d KH |
988 | cmd->result = DID_ERROR << 16; |
989 | done(cmd); | |
990 | return 0; | |
9ba136d0 KH |
991 | } |
992 | ||
2d826cc5 | 993 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
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, | |
2d826cc5 | 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 | 1019 | orb->request.misc = |
f1397490 SR |
1020 | COMMAND_ORB_MAX_PAYLOAD(device->max_speed + 7) | |
1021 | COMMAND_ORB_SPEED(device->max_speed) | | |
a77754a7 | 1022 | COMMAND_ORB_NOTIFY; |
9ba136d0 KH |
1023 | |
1024 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
1025 | orb->request.misc |= | |
a77754a7 | 1026 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_FROM_MEDIA); |
9ba136d0 KH |
1027 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) |
1028 | orb->request.misc |= | |
a77754a7 | 1029 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA); |
9ba136d0 | 1030 | |
213d7bbd | 1031 | if (cmd->use_sg && sbp2_command_orb_map_scatterlist(orb) < 0) |
95ffc5e3 | 1032 | goto fail_map_payload; |
9ba136d0 | 1033 | |
2d826cc5 | 1034 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); |
9ba136d0 KH |
1035 | |
1036 | memset(orb->request.command_block, | |
2d826cc5 | 1037 | 0, sizeof(orb->request.command_block)); |
9ba136d0 KH |
1038 | memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); |
1039 | ||
1040 | orb->base.callback = complete_command_orb; | |
1041 | ||
1042 | sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation, | |
1043 | sd->command_block_agent_address + SBP2_ORB_POINTER); | |
1044 | ||
1045 | return 0; | |
82eff9db | 1046 | |
95ffc5e3 | 1047 | fail_map_payload: |
82eff9db | 1048 | dma_unmap_single(device->card->device, orb->base.request_bus, |
2d826cc5 | 1049 | sizeof(orb->request), DMA_TO_DEVICE); |
82eff9db KH |
1050 | fail_mapping: |
1051 | kfree(orb); | |
1052 | fail_alloc: | |
e1b68c4d | 1053 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 KH |
1054 | } |
1055 | ||
cfb01381 SR |
1056 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1057 | { | |
ad85274f | 1058 | struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata; |
cfb01381 SR |
1059 | |
1060 | sdev->allow_restart = 1; | |
1061 | ||
1062 | if (sd->workarounds & SBP2_WORKAROUND_INQUIRY_36) | |
1063 | sdev->inquiry_len = 36; | |
1064 | return 0; | |
1065 | } | |
1066 | ||
9ba136d0 KH |
1067 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1068 | { | |
ad85274f KH |
1069 | struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata; |
1070 | struct fw_unit *unit = sd->unit; | |
9ba136d0 | 1071 | |
cfb01381 SR |
1072 | sdev->use_10_for_rw = 1; |
1073 | ||
1074 | if (sdev->type == TYPE_ROM) | |
1075 | sdev->use_10_for_ms = 1; | |
9ba136d0 KH |
1076 | if (sdev->type == TYPE_DISK && |
1077 | sd->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
1078 | sdev->skip_ms_page_8 = 1; | |
1079 | if (sd->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) { | |
1080 | fw_notify("setting fix_capacity for %s\n", unit->device.bus_id); | |
1081 | sdev->fix_capacity = 1; | |
1082 | } | |
1083 | ||
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | * Called by scsi stack when something has really gone wrong. Usually | |
1089 | * called when a command has timed-out for some reason. | |
1090 | */ | |
1091 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1092 | { | |
ad85274f KH |
1093 | struct sbp2_device *sd = |
1094 | (struct sbp2_device *)cmd->device->host->hostdata; | |
1095 | struct fw_unit *unit = sd->unit; | |
9ba136d0 KH |
1096 | |
1097 | fw_notify("sbp2_scsi_abort\n"); | |
0fc7d6e4 | 1098 | sbp2_agent_reset(unit); |
9ba136d0 KH |
1099 | sbp2_cancel_orbs(unit); |
1100 | ||
1101 | return SUCCESS; | |
1102 | } | |
1103 | ||
14e21986 SR |
1104 | /* |
1105 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: | |
1106 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) | |
1107 | * | |
1108 | * This is the concatenation of target port identifier and logical unit | |
1109 | * identifier as per SAM-2...SAM-4 annex A. | |
1110 | */ | |
1111 | static ssize_t | |
1112 | sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, | |
1113 | char *buf) | |
1114 | { | |
1115 | struct scsi_device *sdev = to_scsi_device(dev); | |
1116 | struct sbp2_device *sd; | |
1117 | struct fw_unit *unit; | |
1118 | struct fw_device *device; | |
1119 | u32 directory_id; | |
1120 | struct fw_csr_iterator ci; | |
1121 | int key, value, lun; | |
1122 | ||
1123 | if (!sdev) | |
1124 | return 0; | |
1125 | sd = (struct sbp2_device *)sdev->host->hostdata; | |
1126 | unit = sd->unit; | |
1127 | device = fw_device(unit->device.parent); | |
1128 | ||
1129 | /* implicit directory ID */ | |
1130 | directory_id = ((unit->directory - device->config_rom) * 4 | |
1131 | + CSR_CONFIG_ROM) & 0xffffff; | |
1132 | ||
1133 | /* explicit directory ID, overrides implicit ID if present */ | |
1134 | fw_csr_iterator_init(&ci, unit->directory); | |
1135 | while (fw_csr_iterator_next(&ci, &key, &value)) | |
1136 | if (key == CSR_DIRECTORY_ID) { | |
1137 | directory_id = value; | |
1138 | break; | |
1139 | } | |
1140 | ||
1141 | /* FIXME: Make this work for multi-lun devices. */ | |
1142 | lun = 0; | |
1143 | ||
1144 | return sprintf(buf, "%08x%08x:%06x:%04x\n", | |
1145 | device->config_rom[3], device->config_rom[4], | |
1146 | directory_id, lun); | |
1147 | } | |
1148 | ||
1149 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
1150 | ||
1151 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { | |
1152 | &dev_attr_ieee1394_id, | |
1153 | NULL | |
1154 | }; | |
1155 | ||
9ba136d0 KH |
1156 | static struct scsi_host_template scsi_driver_template = { |
1157 | .module = THIS_MODULE, | |
1158 | .name = "SBP-2 IEEE-1394", | |
1159 | .proc_name = (char *)sbp2_driver_name, | |
1160 | .queuecommand = sbp2_scsi_queuecommand, | |
cfb01381 | 1161 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1162 | .slave_configure = sbp2_scsi_slave_configure, |
1163 | .eh_abort_handler = sbp2_scsi_abort, | |
1164 | .this_id = -1, | |
1165 | .sg_tablesize = SG_ALL, | |
1166 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1167 | .cmd_per_lun = 1, |
1168 | .can_queue = 1, | |
14e21986 | 1169 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
9ba136d0 KH |
1170 | }; |
1171 | ||
9ba136d0 KH |
1172 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1173 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1174 | MODULE_LICENSE("GPL"); | |
1175 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1176 | ||
1e4c7b0d OH |
1177 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1178 | #ifndef CONFIG_IEEE1394_SBP2_MODULE | |
1179 | MODULE_ALIAS("sbp2"); | |
1180 | #endif | |
1181 | ||
9ba136d0 KH |
1182 | static int __init sbp2_init(void) |
1183 | { | |
1184 | return driver_register(&sbp2_driver.driver); | |
1185 | } | |
1186 | ||
1187 | static void __exit sbp2_cleanup(void) | |
1188 | { | |
1189 | driver_unregister(&sbp2_driver.driver); | |
1190 | } | |
1191 | ||
1192 | module_init(sbp2_init); | |
1193 | module_exit(sbp2_cleanup); |