Commit | Line | Data |
---|---|---|
c781c06d KH |
1 | /* |
2 | * SBP2 driver (SCSI over IEEE1394) | |
9ba136d0 | 3 | * |
27a15e50 | 4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
9ba136d0 KH |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
c781c06d KH |
21 | /* |
22 | * The basic structure of this driver is based on the old storage driver, | |
27a15e50 KH |
23 | * drivers/ieee1394/sbp2.c, originally written by |
24 | * James Goodwin <jamesg@filanet.com> | |
25 | * with later contributions and ongoing maintenance from | |
26 | * Ben Collins <bcollins@debian.org>, | |
27 | * Stefan Richter <stefanr@s5r6.in-berlin.de> | |
28 | * and many others. | |
29 | */ | |
30 | ||
9ba136d0 KH |
31 | #include <linux/kernel.h> |
32 | #include <linux/module.h> | |
5cd54c94 | 33 | #include <linux/moduleparam.h> |
fe69ca3a | 34 | #include <linux/mod_devicetable.h> |
9ba136d0 | 35 | #include <linux/device.h> |
0b5b2903 | 36 | #include <linux/scatterlist.h> |
9ba136d0 | 37 | #include <linux/dma-mapping.h> |
cf47c7a2 | 38 | #include <linux/blkdev.h> |
1d3d52c5 | 39 | #include <linux/timer.h> |
9ba136d0 KH |
40 | |
41 | #include <scsi/scsi.h> | |
42 | #include <scsi/scsi_cmnd.h> | |
43 | #include <scsi/scsi_dbg.h> | |
44 | #include <scsi/scsi_device.h> | |
45 | #include <scsi/scsi_host.h> | |
46 | ||
47 | #include "fw-transaction.h" | |
48 | #include "fw-topology.h" | |
49 | #include "fw-device.h" | |
50 | ||
5cd54c94 SR |
51 | /* |
52 | * So far only bridges from Oxford Semiconductor are known to support | |
53 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
54 | * are possible on OXFW911 and newer Oxsemi bridges. | |
55 | * | |
56 | * Concurrent logins are useful together with cluster filesystems. | |
57 | */ | |
58 | static int sbp2_param_exclusive_login = 1; | |
59 | module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); | |
60 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " | |
61 | "(default = Y, use N for concurrent initiators)"); | |
62 | ||
9ba136d0 | 63 | /* I don't know why the SCSI stack doesn't define something like this... */ |
a98e2719 | 64 | typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); |
9ba136d0 KH |
65 | |
66 | static const char sbp2_driver_name[] = "sbp2"; | |
67 | ||
68 | struct sbp2_device { | |
b3d6e151 | 69 | struct kref kref; |
9ba136d0 KH |
70 | struct fw_unit *unit; |
71 | struct fw_address_handler address_handler; | |
72 | struct list_head orb_list; | |
73 | u64 management_agent_address; | |
74 | u64 command_block_agent_address; | |
75 | u32 workarounds; | |
76 | int login_id; | |
77 | ||
c781c06d KH |
78 | /* |
79 | * We cache these addresses and only update them once we've | |
9ba136d0 KH |
80 | * logged in or reconnected to the sbp2 device. That way, any |
81 | * IO to the device will automatically fail and get retried if | |
82 | * it happens in a window where the device is not ready to | |
c781c06d KH |
83 | * handle it (e.g. after a bus reset but before we reconnect). |
84 | */ | |
9ba136d0 KH |
85 | int node_id; |
86 | int address_high; | |
87 | int generation; | |
88 | ||
7f37c426 KH |
89 | int retries; |
90 | struct delayed_work work; | |
9ba136d0 KH |
91 | }; |
92 | ||
93 | #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 | |
94 | #define SBP2_MAX_SECTORS 255 /* Max sectors supported */ | |
1d3d52c5 | 95 | #define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */ |
9ba136d0 KH |
96 | |
97 | #define SBP2_ORB_NULL 0x80000000 | |
98 | ||
99 | #define SBP2_DIRECTION_TO_MEDIA 0x0 | |
100 | #define SBP2_DIRECTION_FROM_MEDIA 0x1 | |
101 | ||
102 | /* Unit directory keys */ | |
103 | #define SBP2_COMMAND_SET_SPECIFIER 0x38 | |
104 | #define SBP2_COMMAND_SET 0x39 | |
105 | #define SBP2_COMMAND_SET_REVISION 0x3b | |
106 | #define SBP2_FIRMWARE_REVISION 0x3c | |
107 | ||
108 | /* Flags for detected oddities and brokeness */ | |
109 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 | |
110 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 | |
111 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 | |
112 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 | |
113 | #define SBP2_WORKAROUND_OVERRIDE 0x100 | |
114 | ||
115 | /* Management orb opcodes */ | |
116 | #define SBP2_LOGIN_REQUEST 0x0 | |
117 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
118 | #define SBP2_RECONNECT_REQUEST 0x3 | |
119 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
120 | #define SBP2_LOGOUT_REQUEST 0x7 | |
121 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
122 | #define SBP2_ABORT_TASK_SET 0xc | |
123 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
124 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
125 | ||
126 | /* Offsets for command block agent registers */ | |
127 | #define SBP2_AGENT_STATE 0x00 | |
128 | #define SBP2_AGENT_RESET 0x04 | |
129 | #define SBP2_ORB_POINTER 0x08 | |
130 | #define SBP2_DOORBELL 0x10 | |
131 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
132 | ||
133 | /* Status write response codes */ | |
134 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
135 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
136 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
137 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
138 | ||
a77754a7 KH |
139 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
140 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) | |
141 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) | |
142 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) | |
143 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) | |
144 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) | |
145 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) | |
146 | #define STATUS_GET_DATA(v) ((v).data) | |
9ba136d0 KH |
147 | |
148 | struct sbp2_status { | |
149 | u32 status; | |
150 | u32 orb_low; | |
151 | u8 data[24]; | |
152 | }; | |
153 | ||
154 | struct sbp2_pointer { | |
155 | u32 high; | |
156 | u32 low; | |
157 | }; | |
158 | ||
159 | struct sbp2_orb { | |
160 | struct fw_transaction t; | |
161 | dma_addr_t request_bus; | |
162 | int rcode; | |
163 | struct sbp2_pointer pointer; | |
a98e2719 | 164 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
9ba136d0 KH |
165 | struct list_head link; |
166 | }; | |
167 | ||
a77754a7 KH |
168 | #define MANAGEMENT_ORB_LUN(v) ((v)) |
169 | #define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16) | |
170 | #define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20) | |
5cd54c94 | 171 | #define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0) |
a77754a7 KH |
172 | #define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29) |
173 | #define MANAGEMENT_ORB_NOTIFY ((1) << 31) | |
9ba136d0 | 174 | |
a77754a7 KH |
175 | #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) |
176 | #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) | |
9ba136d0 KH |
177 | |
178 | struct sbp2_management_orb { | |
179 | struct sbp2_orb base; | |
180 | struct { | |
181 | struct sbp2_pointer password; | |
182 | struct sbp2_pointer response; | |
183 | u32 misc; | |
184 | u32 length; | |
185 | struct sbp2_pointer status_fifo; | |
186 | } request; | |
187 | __be32 response[4]; | |
188 | dma_addr_t response_bus; | |
189 | struct completion done; | |
190 | struct sbp2_status status; | |
191 | }; | |
192 | ||
a77754a7 KH |
193 | #define LOGIN_RESPONSE_GET_LOGIN_ID(v) ((v).misc & 0xffff) |
194 | #define LOGIN_RESPONSE_GET_LENGTH(v) (((v).misc >> 16) & 0xffff) | |
9ba136d0 KH |
195 | |
196 | struct sbp2_login_response { | |
197 | u32 misc; | |
198 | struct sbp2_pointer command_block_agent; | |
199 | u32 reconnect_hold; | |
200 | }; | |
a77754a7 KH |
201 | #define COMMAND_ORB_DATA_SIZE(v) ((v)) |
202 | #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) | |
203 | #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) | |
204 | #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) | |
205 | #define COMMAND_ORB_SPEED(v) ((v) << 24) | |
206 | #define COMMAND_ORB_DIRECTION(v) ((v) << 27) | |
207 | #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) | |
208 | #define COMMAND_ORB_NOTIFY ((1) << 31) | |
9ba136d0 KH |
209 | |
210 | struct sbp2_command_orb { | |
211 | struct sbp2_orb base; | |
212 | struct { | |
213 | struct sbp2_pointer next; | |
214 | struct sbp2_pointer data_descriptor; | |
215 | u32 misc; | |
216 | u8 command_block[12]; | |
217 | } request; | |
218 | struct scsi_cmnd *cmd; | |
219 | scsi_done_fn_t done; | |
220 | struct fw_unit *unit; | |
221 | ||
222 | struct sbp2_pointer page_table[SG_ALL]; | |
223 | dma_addr_t page_table_bus; | |
9ba136d0 KH |
224 | }; |
225 | ||
226 | /* | |
227 | * List of devices with known bugs. | |
228 | * | |
229 | * The firmware_revision field, masked with 0xffff00, is the best | |
230 | * indicator for the type of bridge chip of a device. It yields a few | |
231 | * false positives but this did not break correctly behaving devices | |
232 | * so far. We use ~0 as a wildcard, since the 24 bit values we get | |
233 | * from the config rom can never match that. | |
234 | */ | |
235 | static const struct { | |
236 | u32 firmware_revision; | |
237 | u32 model; | |
238 | unsigned workarounds; | |
239 | } sbp2_workarounds_table[] = { | |
240 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
241 | .firmware_revision = 0x002800, | |
242 | .model = 0x001010, | |
243 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
244 | SBP2_WORKAROUND_MODE_SENSE_8, | |
245 | }, | |
246 | /* Initio bridges, actually only needed for some older ones */ { | |
247 | .firmware_revision = 0x000200, | |
248 | .model = ~0, | |
249 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
250 | }, | |
251 | /* Symbios bridge */ { | |
252 | .firmware_revision = 0xa0b800, | |
253 | .model = ~0, | |
254 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
255 | }, | |
c781c06d KH |
256 | |
257 | /* | |
258 | * There are iPods (2nd gen, 3rd gen) with model_id == 0, but | |
9ba136d0 KH |
259 | * these iPods do not feature the read_capacity bug according |
260 | * to one report. Read_capacity behaviour as well as model_id | |
c781c06d KH |
261 | * could change due to Apple-supplied firmware updates though. |
262 | */ | |
263 | ||
9ba136d0 KH |
264 | /* iPod 4th generation. */ { |
265 | .firmware_revision = 0x0a2700, | |
266 | .model = 0x000021, | |
267 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
268 | }, | |
269 | /* iPod mini */ { | |
270 | .firmware_revision = 0x0a2700, | |
271 | .model = 0x000023, | |
272 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
273 | }, | |
274 | /* iPod Photo */ { | |
275 | .firmware_revision = 0x0a2700, | |
276 | .model = 0x00007e, | |
277 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
278 | } | |
279 | }; | |
280 | ||
281 | static void | |
282 | sbp2_status_write(struct fw_card *card, struct fw_request *request, | |
283 | int tcode, int destination, int source, | |
284 | int generation, int speed, | |
285 | unsigned long long offset, | |
286 | void *payload, size_t length, void *callback_data) | |
287 | { | |
288 | struct sbp2_device *sd = callback_data; | |
289 | struct sbp2_orb *orb; | |
290 | struct sbp2_status status; | |
291 | size_t header_size; | |
292 | unsigned long flags; | |
293 | ||
294 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
2d826cc5 | 295 | length == 0 || length > sizeof(status)) { |
9ba136d0 KH |
296 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
297 | return; | |
298 | } | |
299 | ||
300 | header_size = min(length, 2 * sizeof(u32)); | |
301 | fw_memcpy_from_be32(&status, payload, header_size); | |
302 | if (length > header_size) | |
303 | memcpy(status.data, payload + 8, length - header_size); | |
a77754a7 | 304 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
9ba136d0 KH |
305 | fw_notify("non-orb related status write, not handled\n"); |
306 | fw_send_response(card, request, RCODE_COMPLETE); | |
307 | return; | |
308 | } | |
309 | ||
310 | /* Lookup the orb corresponding to this status write. */ | |
311 | spin_lock_irqsave(&card->lock, flags); | |
312 | list_for_each_entry(orb, &sd->orb_list, link) { | |
a77754a7 KH |
313 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
314 | STATUS_GET_ORB_LOW(status) == orb->request_bus && | |
12f26aa1 | 315 | orb->rcode == RCODE_COMPLETE) { |
9ba136d0 KH |
316 | list_del(&orb->link); |
317 | break; | |
318 | } | |
319 | } | |
320 | spin_unlock_irqrestore(&card->lock, flags); | |
321 | ||
322 | if (&orb->link != &sd->orb_list) | |
323 | orb->callback(orb, &status); | |
324 | else | |
325 | fw_error("status write for unknown orb\n"); | |
326 | ||
327 | fw_send_response(card, request, RCODE_COMPLETE); | |
328 | } | |
329 | ||
330 | static void | |
331 | complete_transaction(struct fw_card *card, int rcode, | |
332 | void *payload, size_t length, void *data) | |
333 | { | |
334 | struct sbp2_orb *orb = data; | |
335 | unsigned long flags; | |
336 | ||
337 | orb->rcode = rcode; | |
338 | if (rcode != RCODE_COMPLETE) { | |
339 | spin_lock_irqsave(&card->lock, flags); | |
340 | list_del(&orb->link); | |
341 | spin_unlock_irqrestore(&card->lock, flags); | |
342 | orb->callback(orb, NULL); | |
343 | } | |
344 | } | |
345 | ||
346 | static void | |
347 | sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, | |
348 | int node_id, int generation, u64 offset) | |
349 | { | |
350 | struct fw_device *device = fw_device(unit->device.parent); | |
351 | struct sbp2_device *sd = unit->device.driver_data; | |
352 | unsigned long flags; | |
353 | ||
354 | orb->pointer.high = 0; | |
355 | orb->pointer.low = orb->request_bus; | |
2d826cc5 | 356 | fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer)); |
9ba136d0 KH |
357 | |
358 | spin_lock_irqsave(&device->card->lock, flags); | |
359 | list_add_tail(&orb->link, &sd->orb_list); | |
360 | spin_unlock_irqrestore(&device->card->lock, flags); | |
361 | ||
362 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, | |
f1397490 | 363 | node_id, generation, device->max_speed, offset, |
2d826cc5 | 364 | &orb->pointer, sizeof(orb->pointer), |
9ba136d0 KH |
365 | complete_transaction, orb); |
366 | } | |
367 | ||
2aaad97b | 368 | static int sbp2_cancel_orbs(struct fw_unit *unit) |
9ba136d0 KH |
369 | { |
370 | struct fw_device *device = fw_device(unit->device.parent); | |
371 | struct sbp2_device *sd = unit->device.driver_data; | |
372 | struct sbp2_orb *orb, *next; | |
373 | struct list_head list; | |
374 | unsigned long flags; | |
2aaad97b | 375 | int retval = -ENOENT; |
9ba136d0 KH |
376 | |
377 | INIT_LIST_HEAD(&list); | |
378 | spin_lock_irqsave(&device->card->lock, flags); | |
379 | list_splice_init(&sd->orb_list, &list); | |
380 | spin_unlock_irqrestore(&device->card->lock, flags); | |
381 | ||
382 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 383 | retval = 0; |
730c32f5 KH |
384 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
385 | continue; | |
386 | ||
9ba136d0 KH |
387 | orb->rcode = RCODE_CANCELLED; |
388 | orb->callback(orb, NULL); | |
389 | } | |
9ba136d0 | 390 | |
2aaad97b | 391 | return retval; |
1d3d52c5 KH |
392 | } |
393 | ||
9ba136d0 KH |
394 | static void |
395 | complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
396 | { | |
397 | struct sbp2_management_orb *orb = | |
6f061487 | 398 | container_of(base_orb, struct sbp2_management_orb, base); |
9ba136d0 KH |
399 | |
400 | if (status) | |
2d826cc5 | 401 | memcpy(&orb->status, status, sizeof(*status)); |
9ba136d0 KH |
402 | complete(&orb->done); |
403 | } | |
404 | ||
405 | static int | |
406 | sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, | |
407 | int function, int lun, void *response) | |
408 | { | |
409 | struct fw_device *device = fw_device(unit->device.parent); | |
410 | struct sbp2_device *sd = unit->device.driver_data; | |
411 | struct sbp2_management_orb *orb; | |
9ba136d0 KH |
412 | int retval = -ENOMEM; |
413 | ||
2d826cc5 | 414 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
415 | if (orb == NULL) |
416 | return -ENOMEM; | |
417 | ||
c781c06d KH |
418 | /* |
419 | * The sbp2 device is going to send a block read request to | |
420 | * read out the request from host memory, so map it for dma. | |
421 | */ | |
9ba136d0 KH |
422 | orb->base.request_bus = |
423 | dma_map_single(device->card->device, &orb->request, | |
2d826cc5 | 424 | sizeof(orb->request), DMA_TO_DEVICE); |
82eff9db | 425 | if (dma_mapping_error(orb->base.request_bus)) |
9ba136d0 KH |
426 | goto out; |
427 | ||
428 | orb->response_bus = | |
429 | dma_map_single(device->card->device, &orb->response, | |
2d826cc5 | 430 | sizeof(orb->response), DMA_FROM_DEVICE); |
82eff9db | 431 | if (dma_mapping_error(orb->response_bus)) |
9ba136d0 KH |
432 | goto out; |
433 | ||
434 | orb->request.response.high = 0; | |
435 | orb->request.response.low = orb->response_bus; | |
436 | ||
437 | orb->request.misc = | |
a77754a7 KH |
438 | MANAGEMENT_ORB_NOTIFY | |
439 | MANAGEMENT_ORB_FUNCTION(function) | | |
440 | MANAGEMENT_ORB_LUN(lun); | |
9ba136d0 | 441 | orb->request.length = |
2d826cc5 | 442 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)); |
9ba136d0 KH |
443 | |
444 | orb->request.status_fifo.high = sd->address_handler.offset >> 32; | |
445 | orb->request.status_fifo.low = sd->address_handler.offset; | |
446 | ||
9ba136d0 KH |
447 | if (function == SBP2_LOGIN_REQUEST) { |
448 | orb->request.misc |= | |
5cd54c94 | 449 | MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login) | |
a77754a7 | 450 | MANAGEMENT_ORB_RECONNECT(0); |
9ba136d0 KH |
451 | } |
452 | ||
2d826cc5 | 453 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); |
9ba136d0 KH |
454 | |
455 | init_completion(&orb->done); | |
456 | orb->base.callback = complete_management_orb; | |
2aaad97b | 457 | |
9ba136d0 KH |
458 | sbp2_send_orb(&orb->base, unit, |
459 | node_id, generation, sd->management_agent_address); | |
460 | ||
2aaad97b KH |
461 | wait_for_completion_timeout(&orb->done, |
462 | msecs_to_jiffies(SBP2_ORB_TIMEOUT)); | |
9ba136d0 | 463 | |
9ba136d0 | 464 | retval = -EIO; |
2aaad97b KH |
465 | if (sbp2_cancel_orbs(unit) == 0) { |
466 | fw_error("orb reply timed out, rcode=0x%02x\n", | |
9ba136d0 KH |
467 | orb->base.rcode); |
468 | goto out; | |
469 | } | |
470 | ||
2aaad97b KH |
471 | if (orb->base.rcode != RCODE_COMPLETE) { |
472 | fw_error("management write failed, rcode 0x%02x\n", | |
9ba136d0 KH |
473 | orb->base.rcode); |
474 | goto out; | |
475 | } | |
476 | ||
a77754a7 KH |
477 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
478 | STATUS_GET_SBP_STATUS(orb->status) != 0) { | |
9ba136d0 | 479 | fw_error("error status: %d:%d\n", |
a77754a7 KH |
480 | STATUS_GET_RESPONSE(orb->status), |
481 | STATUS_GET_SBP_STATUS(orb->status)); | |
9ba136d0 KH |
482 | goto out; |
483 | } | |
484 | ||
485 | retval = 0; | |
486 | out: | |
487 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 488 | sizeof(orb->request), DMA_TO_DEVICE); |
9ba136d0 | 489 | dma_unmap_single(device->card->device, orb->response_bus, |
2d826cc5 | 490 | sizeof(orb->response), DMA_FROM_DEVICE); |
9ba136d0 KH |
491 | |
492 | if (response) | |
493 | fw_memcpy_from_be32(response, | |
2d826cc5 | 494 | orb->response, sizeof(orb->response)); |
9ba136d0 KH |
495 | kfree(orb); |
496 | ||
497 | return retval; | |
498 | } | |
499 | ||
500 | static void | |
501 | complete_agent_reset_write(struct fw_card *card, int rcode, | |
502 | void *payload, size_t length, void *data) | |
503 | { | |
504 | struct fw_transaction *t = data; | |
505 | ||
9ba136d0 KH |
506 | kfree(t); |
507 | } | |
508 | ||
509 | static int sbp2_agent_reset(struct fw_unit *unit) | |
510 | { | |
511 | struct fw_device *device = fw_device(unit->device.parent); | |
512 | struct sbp2_device *sd = unit->device.driver_data; | |
513 | struct fw_transaction *t; | |
514 | static u32 zero; | |
515 | ||
2d826cc5 | 516 | t = kzalloc(sizeof(*t), GFP_ATOMIC); |
9ba136d0 KH |
517 | if (t == NULL) |
518 | return -ENOMEM; | |
519 | ||
520 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
ffd0db26 | 521 | sd->node_id, sd->generation, device->max_speed, |
9ba136d0 | 522 | sd->command_block_agent_address + SBP2_AGENT_RESET, |
2d826cc5 | 523 | &zero, sizeof(zero), complete_agent_reset_write, t); |
9ba136d0 KH |
524 | |
525 | return 0; | |
526 | } | |
527 | ||
7f37c426 | 528 | static void sbp2_reconnect(struct work_struct *work); |
ad85274f | 529 | static struct scsi_host_template scsi_driver_template; |
7f37c426 | 530 | |
79352e9f | 531 | static void release_sbp2_device(struct kref *kref) |
b3d6e151 KH |
532 | { |
533 | struct sbp2_device *sd = container_of(kref, struct sbp2_device, kref); | |
ad85274f KH |
534 | struct Scsi_Host *host = |
535 | container_of((void *)sd, struct Scsi_Host, hostdata[0]); | |
b3d6e151 | 536 | |
79352e9f | 537 | scsi_remove_host(host); |
b3d6e151 KH |
538 | sbp2_send_management_orb(sd->unit, sd->node_id, sd->generation, |
539 | SBP2_LOGOUT_REQUEST, sd->login_id, NULL); | |
b3d6e151 KH |
540 | fw_core_remove_address_handler(&sd->address_handler); |
541 | fw_notify("removed sbp2 unit %s\n", sd->unit->device.bus_id); | |
542 | put_device(&sd->unit->device); | |
ad85274f | 543 | scsi_host_put(host); |
b3d6e151 KH |
544 | } |
545 | ||
7f37c426 KH |
546 | static void sbp2_login(struct work_struct *work) |
547 | { | |
548 | struct sbp2_device *sd = | |
549 | container_of(work, struct sbp2_device, work.work); | |
ad85274f KH |
550 | struct Scsi_Host *host = |
551 | container_of((void *)sd, struct Scsi_Host, hostdata[0]); | |
7f37c426 KH |
552 | struct fw_unit *unit = sd->unit; |
553 | struct fw_device *device = fw_device(unit->device.parent); | |
554 | struct sbp2_login_response response; | |
555 | int generation, node_id, local_node_id, lun, retval; | |
556 | ||
557 | /* FIXME: Make this work for multi-lun devices. */ | |
558 | lun = 0; | |
559 | ||
560 | generation = device->card->generation; | |
561 | node_id = device->node->node_id; | |
562 | local_node_id = device->card->local_node->node_id; | |
563 | ||
564 | if (sbp2_send_management_orb(unit, node_id, generation, | |
565 | SBP2_LOGIN_REQUEST, lun, &response) < 0) { | |
566 | if (sd->retries++ < 5) { | |
7f37c426 KH |
567 | schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); |
568 | } else { | |
569 | fw_error("failed to login to %s\n", | |
570 | unit->device.bus_id); | |
b3d6e151 | 571 | kref_put(&sd->kref, release_sbp2_device); |
7f37c426 KH |
572 | } |
573 | return; | |
574 | } | |
575 | ||
576 | sd->generation = generation; | |
577 | sd->node_id = node_id; | |
578 | sd->address_high = local_node_id << 16; | |
579 | ||
580 | /* Get command block agent offset and login id. */ | |
581 | sd->command_block_agent_address = | |
5c5539d8 | 582 | ((u64) (response.command_block_agent.high & 0xffff) << 32) | |
7f37c426 | 583 | response.command_block_agent.low; |
a77754a7 | 584 | sd->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response); |
7f37c426 | 585 | |
5c5539d8 KH |
586 | fw_notify("logged in to sbp2 unit %s (%d retries)\n", |
587 | unit->device.bus_id, sd->retries); | |
588 | fw_notify(" - management_agent_address: 0x%012llx\n", | |
7f37c426 KH |
589 | (unsigned long long) sd->management_agent_address); |
590 | fw_notify(" - command_block_agent_address: 0x%012llx\n", | |
591 | (unsigned long long) sd->command_block_agent_address); | |
5c5539d8 | 592 | fw_notify(" - status write address: 0x%012llx\n", |
7f37c426 KH |
593 | (unsigned long long) sd->address_handler.offset); |
594 | ||
595 | #if 0 | |
596 | /* FIXME: The linux1394 sbp2 does this last step. */ | |
597 | sbp2_set_busy_timeout(scsi_id); | |
598 | #endif | |
599 | ||
1da0c93b | 600 | PREPARE_DELAYED_WORK(&sd->work, sbp2_reconnect); |
7f37c426 KH |
601 | sbp2_agent_reset(unit); |
602 | ||
ad85274f KH |
603 | /* FIXME: Loop over luns here. */ |
604 | lun = 0; | |
605 | retval = scsi_add_device(host, 0, 0, lun); | |
7f37c426 KH |
606 | if (retval < 0) { |
607 | sbp2_send_management_orb(unit, sd->node_id, sd->generation, | |
608 | SBP2_LOGOUT_REQUEST, sd->login_id, | |
609 | NULL); | |
c781c06d KH |
610 | /* |
611 | * Set this back to sbp2_login so we fall back and | |
612 | * retry login on bus reset. | |
613 | */ | |
1da0c93b | 614 | PREPARE_DELAYED_WORK(&sd->work, sbp2_login); |
7f37c426 | 615 | } |
b3d6e151 | 616 | kref_put(&sd->kref, release_sbp2_device); |
7f37c426 | 617 | } |
9ba136d0 KH |
618 | |
619 | static int sbp2_probe(struct device *dev) | |
620 | { | |
621 | struct fw_unit *unit = fw_unit(dev); | |
622 | struct fw_device *device = fw_device(unit->device.parent); | |
623 | struct sbp2_device *sd; | |
624 | struct fw_csr_iterator ci; | |
ad85274f KH |
625 | struct Scsi_Host *host; |
626 | int i, key, value, err; | |
9ba136d0 KH |
627 | u32 model, firmware_revision; |
628 | ||
ad85274f KH |
629 | err = -ENOMEM; |
630 | host = scsi_host_alloc(&scsi_driver_template, sizeof(*sd)); | |
631 | if (host == NULL) | |
632 | goto fail; | |
9ba136d0 | 633 | |
ad85274f | 634 | sd = (struct sbp2_device *) host->hostdata; |
9ba136d0 KH |
635 | unit->device.driver_data = sd; |
636 | sd->unit = unit; | |
637 | INIT_LIST_HEAD(&sd->orb_list); | |
b3d6e151 | 638 | kref_init(&sd->kref); |
9ba136d0 KH |
639 | |
640 | sd->address_handler.length = 0x100; | |
641 | sd->address_handler.address_callback = sbp2_status_write; | |
642 | sd->address_handler.callback_data = sd; | |
643 | ||
ad85274f KH |
644 | err = fw_core_add_address_handler(&sd->address_handler, |
645 | &fw_high_memory_region); | |
646 | if (err < 0) | |
647 | goto fail_host; | |
9ba136d0 | 648 | |
ad85274f KH |
649 | err = fw_device_enable_phys_dma(device); |
650 | if (err < 0) | |
651 | goto fail_address_handler; | |
652 | ||
653 | err = scsi_add_host(host, &unit->device); | |
654 | if (err < 0) | |
655 | goto fail_address_handler; | |
9ba136d0 | 656 | |
c781c06d KH |
657 | /* |
658 | * Scan unit directory to get management agent address, | |
9ba136d0 | 659 | * firmware revison and model. Initialize firmware_revision |
c781c06d KH |
660 | * and model to values that wont match anything in our table. |
661 | */ | |
9ba136d0 KH |
662 | firmware_revision = 0xff000000; |
663 | model = 0xff000000; | |
664 | fw_csr_iterator_init(&ci, unit->directory); | |
665 | while (fw_csr_iterator_next(&ci, &key, &value)) { | |
666 | switch (key) { | |
667 | case CSR_DEPENDENT_INFO | CSR_OFFSET: | |
668 | sd->management_agent_address = | |
669 | 0xfffff0000000ULL + 4 * value; | |
670 | break; | |
671 | case SBP2_FIRMWARE_REVISION: | |
672 | firmware_revision = value; | |
673 | break; | |
674 | case CSR_MODEL: | |
675 | model = value; | |
676 | break; | |
677 | } | |
678 | } | |
679 | ||
680 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
681 | if (sbp2_workarounds_table[i].firmware_revision != | |
682 | (firmware_revision & 0xffffff00)) | |
683 | continue; | |
684 | if (sbp2_workarounds_table[i].model != model && | |
685 | sbp2_workarounds_table[i].model != ~0) | |
686 | continue; | |
687 | sd->workarounds |= sbp2_workarounds_table[i].workarounds; | |
688 | break; | |
689 | } | |
690 | ||
691 | if (sd->workarounds) | |
692 | fw_notify("Workarounds for node %s: 0x%x " | |
693 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", | |
694 | unit->device.bus_id, | |
695 | sd->workarounds, firmware_revision, model); | |
696 | ||
b3d6e151 KH |
697 | get_device(&unit->device); |
698 | ||
c781c06d KH |
699 | /* |
700 | * We schedule work to do the login so we can easily | |
b3d6e151 | 701 | * reschedule retries. Always get the ref before scheduling |
c781c06d KH |
702 | * work. |
703 | */ | |
7f37c426 | 704 | INIT_DELAYED_WORK(&sd->work, sbp2_login); |
b3d6e151 KH |
705 | if (schedule_delayed_work(&sd->work, 0)) |
706 | kref_get(&sd->kref); | |
9ba136d0 KH |
707 | |
708 | return 0; | |
ad85274f KH |
709 | |
710 | fail_address_handler: | |
711 | fw_core_remove_address_handler(&sd->address_handler); | |
712 | fail_host: | |
713 | scsi_host_put(host); | |
714 | fail: | |
715 | return err; | |
9ba136d0 KH |
716 | } |
717 | ||
718 | static int sbp2_remove(struct device *dev) | |
719 | { | |
720 | struct fw_unit *unit = fw_unit(dev); | |
721 | struct sbp2_device *sd = unit->device.driver_data; | |
722 | ||
b3d6e151 | 723 | kref_put(&sd->kref, release_sbp2_device); |
9ba136d0 KH |
724 | |
725 | return 0; | |
726 | } | |
727 | ||
728 | static void sbp2_reconnect(struct work_struct *work) | |
729 | { | |
7f37c426 KH |
730 | struct sbp2_device *sd = |
731 | container_of(work, struct sbp2_device, work.work); | |
9ba136d0 KH |
732 | struct fw_unit *unit = sd->unit; |
733 | struct fw_device *device = fw_device(unit->device.parent); | |
734 | int generation, node_id, local_node_id; | |
735 | ||
9ba136d0 KH |
736 | generation = device->card->generation; |
737 | node_id = device->node->node_id; | |
738 | local_node_id = device->card->local_node->node_id; | |
739 | ||
7f37c426 KH |
740 | if (sbp2_send_management_orb(unit, node_id, generation, |
741 | SBP2_RECONNECT_REQUEST, | |
742 | sd->login_id, NULL) < 0) { | |
5c5539d8 | 743 | if (sd->retries++ >= 5) { |
7f37c426 KH |
744 | fw_error("failed to reconnect to %s\n", |
745 | unit->device.bus_id); | |
746 | /* Fall back and try to log in again. */ | |
747 | sd->retries = 0; | |
1da0c93b | 748 | PREPARE_DELAYED_WORK(&sd->work, sbp2_login); |
7f37c426 KH |
749 | } |
750 | schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); | |
751 | return; | |
752 | } | |
9ba136d0 KH |
753 | |
754 | sd->generation = generation; | |
755 | sd->node_id = node_id; | |
907293d7 | 756 | sd->address_high = local_node_id << 16; |
7f37c426 | 757 | |
5c5539d8 KH |
758 | fw_notify("reconnected to unit %s (%d retries)\n", |
759 | unit->device.bus_id, sd->retries); | |
7f37c426 KH |
760 | sbp2_agent_reset(unit); |
761 | sbp2_cancel_orbs(unit); | |
b3d6e151 | 762 | kref_put(&sd->kref, release_sbp2_device); |
9ba136d0 KH |
763 | } |
764 | ||
765 | static void sbp2_update(struct fw_unit *unit) | |
766 | { | |
767 | struct fw_device *device = fw_device(unit->device.parent); | |
768 | struct sbp2_device *sd = unit->device.driver_data; | |
769 | ||
7f37c426 | 770 | sd->retries = 0; |
9ba136d0 | 771 | fw_device_enable_phys_dma(device); |
b3d6e151 KH |
772 | if (schedule_delayed_work(&sd->work, 0)) |
773 | kref_get(&sd->kref); | |
9ba136d0 KH |
774 | } |
775 | ||
776 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
777 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
778 | ||
21ebcd12 | 779 | static const struct fw_device_id sbp2_id_table[] = { |
9ba136d0 KH |
780 | { |
781 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, | |
782 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, | |
5af4e5ea | 783 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
784 | }, |
785 | { } | |
786 | }; | |
787 | ||
788 | static struct fw_driver sbp2_driver = { | |
789 | .driver = { | |
790 | .owner = THIS_MODULE, | |
791 | .name = sbp2_driver_name, | |
792 | .bus = &fw_bus_type, | |
793 | .probe = sbp2_probe, | |
794 | .remove = sbp2_remove, | |
795 | }, | |
796 | .update = sbp2_update, | |
797 | .id_table = sbp2_id_table, | |
798 | }; | |
799 | ||
fbb5423c KH |
800 | static unsigned int |
801 | sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) | |
9ba136d0 | 802 | { |
fbb5423c KH |
803 | int sam_status; |
804 | ||
9ba136d0 KH |
805 | sense_data[0] = 0x70; |
806 | sense_data[1] = 0x0; | |
807 | sense_data[2] = sbp2_status[1]; | |
808 | sense_data[3] = sbp2_status[4]; | |
809 | sense_data[4] = sbp2_status[5]; | |
810 | sense_data[5] = sbp2_status[6]; | |
811 | sense_data[6] = sbp2_status[7]; | |
812 | sense_data[7] = 10; | |
813 | sense_data[8] = sbp2_status[8]; | |
814 | sense_data[9] = sbp2_status[9]; | |
815 | sense_data[10] = sbp2_status[10]; | |
816 | sense_data[11] = sbp2_status[11]; | |
817 | sense_data[12] = sbp2_status[2]; | |
818 | sense_data[13] = sbp2_status[3]; | |
819 | sense_data[14] = sbp2_status[12]; | |
820 | sense_data[15] = sbp2_status[13]; | |
821 | ||
fbb5423c | 822 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 823 | |
fbb5423c KH |
824 | switch (sam_status) { |
825 | case SAM_STAT_GOOD: | |
9ba136d0 | 826 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 827 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 828 | case SAM_STAT_BUSY: |
9ba136d0 KH |
829 | case SAM_STAT_RESERVATION_CONFLICT: |
830 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
831 | return DID_OK << 16 | sam_status; |
832 | ||
9ba136d0 | 833 | default: |
fbb5423c | 834 | return DID_ERROR << 16; |
9ba136d0 KH |
835 | } |
836 | } | |
837 | ||
838 | static void | |
839 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
840 | { | |
6f061487 JF |
841 | struct sbp2_command_orb *orb = |
842 | container_of(base_orb, struct sbp2_command_orb, base); | |
9ba136d0 KH |
843 | struct fw_unit *unit = orb->unit; |
844 | struct fw_device *device = fw_device(unit->device.parent); | |
845 | struct scatterlist *sg; | |
846 | int result; | |
847 | ||
848 | if (status != NULL) { | |
a77754a7 | 849 | if (STATUS_GET_DEAD(*status)) |
9ba136d0 | 850 | sbp2_agent_reset(unit); |
9ba136d0 | 851 | |
a77754a7 | 852 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 853 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 854 | result = DID_OK << 16; |
9ba136d0 KH |
855 | break; |
856 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 857 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
858 | break; |
859 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
860 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
861 | default: | |
fbb5423c | 862 | result = DID_ERROR << 16; |
9ba136d0 KH |
863 | break; |
864 | } | |
865 | ||
a77754a7 KH |
866 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
867 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
868 | orb->cmd->sense_buffer); |
869 | } else { | |
c781c06d KH |
870 | /* |
871 | * If the orb completes with status == NULL, something | |
9ba136d0 | 872 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
873 | * or when sending the write (less likely). |
874 | */ | |
fbb5423c | 875 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
876 | } |
877 | ||
878 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 879 | sizeof(orb->request), DMA_TO_DEVICE); |
9ba136d0 KH |
880 | |
881 | if (orb->cmd->use_sg > 0) { | |
882 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
883 | dma_unmap_sg(device->card->device, sg, orb->cmd->use_sg, | |
884 | orb->cmd->sc_data_direction); | |
885 | } | |
886 | ||
887 | if (orb->page_table_bus != 0) | |
888 | dma_unmap_single(device->card->device, orb->page_table_bus, | |
2d826cc5 | 889 | sizeof(orb->page_table_bus), DMA_TO_DEVICE); |
9ba136d0 | 890 | |
fbb5423c | 891 | orb->cmd->result = result; |
9ba136d0 | 892 | orb->done(orb->cmd); |
9ba136d0 KH |
893 | kfree(orb); |
894 | } | |
895 | ||
95ffc5e3 | 896 | static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) |
9ba136d0 | 897 | { |
ad85274f KH |
898 | struct sbp2_device *sd = |
899 | (struct sbp2_device *)orb->cmd->device->host->hostdata; | |
900 | struct fw_unit *unit = sd->unit; | |
9ba136d0 | 901 | struct fw_device *device = fw_device(unit->device.parent); |
9ba136d0 KH |
902 | struct scatterlist *sg; |
903 | int sg_len, l, i, j, count; | |
904 | size_t size; | |
905 | dma_addr_t sg_addr; | |
906 | ||
907 | sg = (struct scatterlist *)orb->cmd->request_buffer; | |
908 | count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg, | |
909 | orb->cmd->sc_data_direction); | |
95ffc5e3 KH |
910 | if (count == 0) |
911 | goto fail; | |
9ba136d0 | 912 | |
c781c06d KH |
913 | /* |
914 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
915 | * the scatter list by converting it to an immediate block |
916 | * request. This is also a workaround for broken devices such | |
917 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
918 | * tables. |
919 | */ | |
9ba136d0 KH |
920 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { |
921 | orb->request.data_descriptor.high = sd->address_high; | |
922 | orb->request.data_descriptor.low = sg_dma_address(sg); | |
923 | orb->request.misc |= | |
a77754a7 | 924 | COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)); |
95ffc5e3 | 925 | return 0; |
9ba136d0 KH |
926 | } |
927 | ||
c781c06d KH |
928 | /* |
929 | * Convert the scatterlist to an sbp2 page table. If any | |
36abb3b1 KHSR |
930 | * scatterlist entries are too big for sbp2, we split them as we |
931 | * go. Even if we ask the block I/O layer to not give us sg | |
932 | * elements larger than 65535 bytes, some IOMMUs may merge sg elements | |
933 | * during DMA mapping, and Linux currently doesn't prevent this. | |
c781c06d | 934 | */ |
9ba136d0 KH |
935 | for (i = 0, j = 0; i < count; i++) { |
936 | sg_len = sg_dma_len(sg + i); | |
937 | sg_addr = sg_dma_address(sg + i); | |
938 | while (sg_len) { | |
939 | l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH); | |
940 | orb->page_table[j].low = sg_addr; | |
941 | orb->page_table[j].high = (l << 16); | |
942 | sg_addr += l; | |
943 | sg_len -= l; | |
944 | j++; | |
945 | } | |
946 | } | |
947 | ||
2d826cc5 | 948 | size = sizeof(orb->page_table[0]) * j; |
9ba136d0 | 949 | |
c781c06d KH |
950 | /* |
951 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
952 | * to fill in the node ID part of the address. All other |
953 | * pointers assume that the data referenced reside on the | |
954 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
955 | * on other nodes so we need to put our ID in descriptor.high. |
956 | */ | |
9ba136d0 KH |
957 | |
958 | orb->page_table_bus = | |
959 | dma_map_single(device->card->device, orb->page_table, | |
960 | size, DMA_TO_DEVICE); | |
95ffc5e3 KH |
961 | if (dma_mapping_error(orb->page_table_bus)) |
962 | goto fail_page_table; | |
9ba136d0 KH |
963 | orb->request.data_descriptor.high = sd->address_high; |
964 | orb->request.data_descriptor.low = orb->page_table_bus; | |
965 | orb->request.misc |= | |
a77754a7 KH |
966 | COMMAND_ORB_PAGE_TABLE_PRESENT | |
967 | COMMAND_ORB_DATA_SIZE(j); | |
9ba136d0 KH |
968 | |
969 | fw_memcpy_to_be32(orb->page_table, orb->page_table, size); | |
95ffc5e3 KH |
970 | |
971 | return 0; | |
972 | ||
973 | fail_page_table: | |
974 | dma_unmap_sg(device->card->device, sg, orb->cmd->use_sg, | |
975 | orb->cmd->sc_data_direction); | |
976 | fail: | |
977 | return -ENOMEM; | |
9ba136d0 KH |
978 | } |
979 | ||
9ba136d0 KH |
980 | /* SCSI stack integration */ |
981 | ||
982 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |
983 | { | |
ad85274f KH |
984 | struct sbp2_device *sd = |
985 | (struct sbp2_device *)cmd->device->host->hostdata; | |
986 | struct fw_unit *unit = sd->unit; | |
9ba136d0 | 987 | struct fw_device *device = fw_device(unit->device.parent); |
9ba136d0 KH |
988 | struct sbp2_command_orb *orb; |
989 | ||
c781c06d KH |
990 | /* |
991 | * Bidirectional commands are not yet implemented, and unknown | |
992 | * transfer direction not handled. | |
993 | */ | |
9ba136d0 | 994 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
8a8cea27 | 995 | fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n"); |
e1b68c4d KH |
996 | cmd->result = DID_ERROR << 16; |
997 | done(cmd); | |
998 | return 0; | |
9ba136d0 KH |
999 | } |
1000 | ||
2d826cc5 | 1001 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
1002 | if (orb == NULL) { |
1003 | fw_notify("failed to alloc orb\n"); | |
82eff9db | 1004 | goto fail_alloc; |
9ba136d0 KH |
1005 | } |
1006 | ||
12f26aa1 KH |
1007 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
1008 | orb->base.rcode = -1; | |
9ba136d0 KH |
1009 | orb->base.request_bus = |
1010 | dma_map_single(device->card->device, &orb->request, | |
2d826cc5 | 1011 | sizeof(orb->request), DMA_TO_DEVICE); |
82eff9db KH |
1012 | if (dma_mapping_error(orb->base.request_bus)) |
1013 | goto fail_mapping; | |
9ba136d0 KH |
1014 | |
1015 | orb->unit = unit; | |
1016 | orb->done = done; | |
1017 | orb->cmd = cmd; | |
1018 | ||
1019 | orb->request.next.high = SBP2_ORB_NULL; | |
1020 | orb->request.next.low = 0x0; | |
c781c06d KH |
1021 | /* |
1022 | * At speed 100 we can do 512 bytes per packet, at speed 200, | |
9ba136d0 KH |
1023 | * 1024 bytes per packet etc. The SBP-2 max_payload field |
1024 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
c781c06d KH |
1025 | * if we set this to max_speed + 7, we get the right value. |
1026 | */ | |
9ba136d0 | 1027 | orb->request.misc = |
f1397490 SR |
1028 | COMMAND_ORB_MAX_PAYLOAD(device->max_speed + 7) | |
1029 | COMMAND_ORB_SPEED(device->max_speed) | | |
a77754a7 | 1030 | COMMAND_ORB_NOTIFY; |
9ba136d0 KH |
1031 | |
1032 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
1033 | orb->request.misc |= | |
a77754a7 | 1034 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_FROM_MEDIA); |
9ba136d0 KH |
1035 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) |
1036 | orb->request.misc |= | |
a77754a7 | 1037 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA); |
9ba136d0 | 1038 | |
213d7bbd | 1039 | if (cmd->use_sg && sbp2_command_orb_map_scatterlist(orb) < 0) |
95ffc5e3 | 1040 | goto fail_map_payload; |
9ba136d0 | 1041 | |
2d826cc5 | 1042 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); |
9ba136d0 KH |
1043 | |
1044 | memset(orb->request.command_block, | |
2d826cc5 | 1045 | 0, sizeof(orb->request.command_block)); |
9ba136d0 KH |
1046 | memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); |
1047 | ||
1048 | orb->base.callback = complete_command_orb; | |
1049 | ||
1050 | sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation, | |
1051 | sd->command_block_agent_address + SBP2_ORB_POINTER); | |
1052 | ||
1053 | return 0; | |
82eff9db | 1054 | |
95ffc5e3 | 1055 | fail_map_payload: |
82eff9db | 1056 | dma_unmap_single(device->card->device, orb->base.request_bus, |
2d826cc5 | 1057 | sizeof(orb->request), DMA_TO_DEVICE); |
82eff9db KH |
1058 | fail_mapping: |
1059 | kfree(orb); | |
1060 | fail_alloc: | |
e1b68c4d | 1061 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 KH |
1062 | } |
1063 | ||
cfb01381 SR |
1064 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1065 | { | |
ad85274f | 1066 | struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata; |
cfb01381 SR |
1067 | |
1068 | sdev->allow_restart = 1; | |
1069 | ||
1070 | if (sd->workarounds & SBP2_WORKAROUND_INQUIRY_36) | |
1071 | sdev->inquiry_len = 36; | |
1072 | return 0; | |
1073 | } | |
1074 | ||
9ba136d0 KH |
1075 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1076 | { | |
ad85274f KH |
1077 | struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata; |
1078 | struct fw_unit *unit = sd->unit; | |
9ba136d0 | 1079 | |
cfb01381 SR |
1080 | sdev->use_10_for_rw = 1; |
1081 | ||
1082 | if (sdev->type == TYPE_ROM) | |
1083 | sdev->use_10_for_ms = 1; | |
9ba136d0 KH |
1084 | if (sdev->type == TYPE_DISK && |
1085 | sd->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
1086 | sdev->skip_ms_page_8 = 1; | |
1087 | if (sd->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) { | |
1088 | fw_notify("setting fix_capacity for %s\n", unit->device.bus_id); | |
1089 | sdev->fix_capacity = 1; | |
1090 | } | |
cf47c7a2 SR |
1091 | if (sd->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
1092 | blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); | |
9ba136d0 KH |
1093 | return 0; |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * Called by scsi stack when something has really gone wrong. Usually | |
1098 | * called when a command has timed-out for some reason. | |
1099 | */ | |
1100 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1101 | { | |
ad85274f KH |
1102 | struct sbp2_device *sd = |
1103 | (struct sbp2_device *)cmd->device->host->hostdata; | |
1104 | struct fw_unit *unit = sd->unit; | |
9ba136d0 KH |
1105 | |
1106 | fw_notify("sbp2_scsi_abort\n"); | |
0fc7d6e4 | 1107 | sbp2_agent_reset(unit); |
9ba136d0 KH |
1108 | sbp2_cancel_orbs(unit); |
1109 | ||
1110 | return SUCCESS; | |
1111 | } | |
1112 | ||
14e21986 SR |
1113 | /* |
1114 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: | |
1115 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) | |
1116 | * | |
1117 | * This is the concatenation of target port identifier and logical unit | |
1118 | * identifier as per SAM-2...SAM-4 annex A. | |
1119 | */ | |
1120 | static ssize_t | |
1121 | sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, | |
1122 | char *buf) | |
1123 | { | |
1124 | struct scsi_device *sdev = to_scsi_device(dev); | |
1125 | struct sbp2_device *sd; | |
1126 | struct fw_unit *unit; | |
1127 | struct fw_device *device; | |
1128 | u32 directory_id; | |
1129 | struct fw_csr_iterator ci; | |
1130 | int key, value, lun; | |
1131 | ||
1132 | if (!sdev) | |
1133 | return 0; | |
1134 | sd = (struct sbp2_device *)sdev->host->hostdata; | |
1135 | unit = sd->unit; | |
1136 | device = fw_device(unit->device.parent); | |
1137 | ||
1138 | /* implicit directory ID */ | |
1139 | directory_id = ((unit->directory - device->config_rom) * 4 | |
1140 | + CSR_CONFIG_ROM) & 0xffffff; | |
1141 | ||
1142 | /* explicit directory ID, overrides implicit ID if present */ | |
1143 | fw_csr_iterator_init(&ci, unit->directory); | |
1144 | while (fw_csr_iterator_next(&ci, &key, &value)) | |
1145 | if (key == CSR_DIRECTORY_ID) { | |
1146 | directory_id = value; | |
1147 | break; | |
1148 | } | |
1149 | ||
1150 | /* FIXME: Make this work for multi-lun devices. */ | |
1151 | lun = 0; | |
1152 | ||
1153 | return sprintf(buf, "%08x%08x:%06x:%04x\n", | |
1154 | device->config_rom[3], device->config_rom[4], | |
1155 | directory_id, lun); | |
1156 | } | |
1157 | ||
1158 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
1159 | ||
1160 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { | |
1161 | &dev_attr_ieee1394_id, | |
1162 | NULL | |
1163 | }; | |
1164 | ||
9ba136d0 KH |
1165 | static struct scsi_host_template scsi_driver_template = { |
1166 | .module = THIS_MODULE, | |
1167 | .name = "SBP-2 IEEE-1394", | |
1168 | .proc_name = (char *)sbp2_driver_name, | |
1169 | .queuecommand = sbp2_scsi_queuecommand, | |
cfb01381 | 1170 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1171 | .slave_configure = sbp2_scsi_slave_configure, |
1172 | .eh_abort_handler = sbp2_scsi_abort, | |
1173 | .this_id = -1, | |
1174 | .sg_tablesize = SG_ALL, | |
1175 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1176 | .cmd_per_lun = 1, |
1177 | .can_queue = 1, | |
14e21986 | 1178 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
9ba136d0 KH |
1179 | }; |
1180 | ||
9ba136d0 KH |
1181 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1182 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1183 | MODULE_LICENSE("GPL"); | |
1184 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1185 | ||
1e4c7b0d OH |
1186 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1187 | #ifndef CONFIG_IEEE1394_SBP2_MODULE | |
1188 | MODULE_ALIAS("sbp2"); | |
1189 | #endif | |
1190 | ||
9ba136d0 KH |
1191 | static int __init sbp2_init(void) |
1192 | { | |
1193 | return driver_register(&sbp2_driver.driver); | |
1194 | } | |
1195 | ||
1196 | static void __exit sbp2_cleanup(void) | |
1197 | { | |
1198 | driver_unregister(&sbp2_driver.driver); | |
1199 | } | |
1200 | ||
1201 | module_init(sbp2_init); | |
1202 | module_exit(sbp2_cleanup); |