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Commit | Line | Data |
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c781c06d KH |
1 | /* |
2 | * SBP2 driver (SCSI over IEEE1394) | |
9ba136d0 | 3 | * |
27a15e50 | 4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
9ba136d0 KH |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
c781c06d KH |
21 | /* |
22 | * The basic structure of this driver is based on the old storage driver, | |
27a15e50 KH |
23 | * drivers/ieee1394/sbp2.c, originally written by |
24 | * James Goodwin <jamesg@filanet.com> | |
25 | * with later contributions and ongoing maintenance from | |
26 | * Ben Collins <bcollins@debian.org>, | |
27 | * Stefan Richter <stefanr@s5r6.in-berlin.de> | |
28 | * and many others. | |
29 | */ | |
30 | ||
9ba136d0 KH |
31 | #include <linux/kernel.h> |
32 | #include <linux/module.h> | |
5cd54c94 | 33 | #include <linux/moduleparam.h> |
fe69ca3a | 34 | #include <linux/mod_devicetable.h> |
9220f194 | 35 | #include <linux/delay.h> |
9ba136d0 | 36 | #include <linux/device.h> |
0b5b2903 | 37 | #include <linux/scatterlist.h> |
9ba136d0 | 38 | #include <linux/dma-mapping.h> |
cf47c7a2 | 39 | #include <linux/blkdev.h> |
e7cdf237 | 40 | #include <linux/string.h> |
2df222b8 | 41 | #include <linux/stringify.h> |
1d3d52c5 | 42 | #include <linux/timer.h> |
df8ec249 | 43 | #include <linux/workqueue.h> |
b5d2a5e0 | 44 | #include <asm/system.h> |
9ba136d0 KH |
45 | |
46 | #include <scsi/scsi.h> | |
47 | #include <scsi/scsi_cmnd.h> | |
9ba136d0 KH |
48 | #include <scsi/scsi_device.h> |
49 | #include <scsi/scsi_host.h> | |
50 | ||
51 | #include "fw-transaction.h" | |
52 | #include "fw-topology.h" | |
53 | #include "fw-device.h" | |
54 | ||
5cd54c94 SR |
55 | /* |
56 | * So far only bridges from Oxford Semiconductor are known to support | |
57 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
58 | * are possible on OXFW911 and newer Oxsemi bridges. | |
59 | * | |
60 | * Concurrent logins are useful together with cluster filesystems. | |
61 | */ | |
62 | static int sbp2_param_exclusive_login = 1; | |
63 | module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); | |
64 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " | |
65 | "(default = Y, use N for concurrent initiators)"); | |
66 | ||
2df222b8 SR |
67 | /* |
68 | * Flags for firmware oddities | |
69 | * | |
70 | * - 128kB max transfer | |
71 | * Limit transfer size. Necessary for some old bridges. | |
72 | * | |
73 | * - 36 byte inquiry | |
74 | * When scsi_mod probes the device, let the inquiry command look like that | |
75 | * from MS Windows. | |
76 | * | |
77 | * - skip mode page 8 | |
78 | * Suppress sending of mode_sense for mode page 8 if the device pretends to | |
79 | * support the SCSI Primary Block commands instead of Reduced Block Commands. | |
80 | * | |
81 | * - fix capacity | |
82 | * Tell sd_mod to correct the last sector number reported by read_capacity. | |
83 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. | |
84 | * Don't use this with devices which don't have this bug. | |
85 | * | |
9220f194 SR |
86 | * - delay inquiry |
87 | * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry. | |
88 | * | |
2df222b8 SR |
89 | * - override internal blacklist |
90 | * Instead of adding to the built-in blacklist, use only the workarounds | |
91 | * specified in the module load parameter. | |
92 | * Useful if a blacklist entry interfered with a non-broken device. | |
93 | */ | |
94 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 | |
95 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 | |
96 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 | |
97 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 | |
9220f194 SR |
98 | #define SBP2_WORKAROUND_DELAY_INQUIRY 0x10 |
99 | #define SBP2_INQUIRY_DELAY 12 | |
2df222b8 SR |
100 | #define SBP2_WORKAROUND_OVERRIDE 0x100 |
101 | ||
102 | static int sbp2_param_workarounds; | |
103 | module_param_named(workarounds, sbp2_param_workarounds, int, 0644); | |
104 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
105 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
106 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
107 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
108 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) | |
9220f194 | 109 | ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY) |
2df222b8 SR |
110 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
111 | ", or a combination)"); | |
112 | ||
9ba136d0 | 113 | /* I don't know why the SCSI stack doesn't define something like this... */ |
a98e2719 | 114 | typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); |
9ba136d0 KH |
115 | |
116 | static const char sbp2_driver_name[] = "sbp2"; | |
117 | ||
5a3c2be6 SR |
118 | /* |
119 | * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry | |
120 | * and one struct scsi_device per sbp2_logical_unit. | |
121 | */ | |
122 | struct sbp2_logical_unit { | |
123 | struct sbp2_target *tgt; | |
124 | struct list_head link; | |
125 | struct scsi_device *sdev; | |
9ba136d0 KH |
126 | struct fw_address_handler address_handler; |
127 | struct list_head orb_list; | |
5a3c2be6 | 128 | |
9ba136d0 | 129 | u64 command_block_agent_address; |
5a3c2be6 | 130 | u16 lun; |
9ba136d0 KH |
131 | int login_id; |
132 | ||
c781c06d | 133 | /* |
5a3c2be6 SR |
134 | * The generation is updated once we've logged in or reconnected |
135 | * to the logical unit. Thus, I/O to the device will automatically | |
136 | * fail and get retried if it happens in a window where the device | |
137 | * is not ready, e.g. after a bus reset but before we reconnect. | |
c781c06d | 138 | */ |
9ba136d0 | 139 | int generation; |
7f37c426 KH |
140 | int retries; |
141 | struct delayed_work work; | |
9ba136d0 KH |
142 | }; |
143 | ||
5a3c2be6 SR |
144 | /* |
145 | * We create one struct sbp2_target per IEEE 1212 Unit Directory | |
146 | * and one struct Scsi_Host per sbp2_target. | |
147 | */ | |
148 | struct sbp2_target { | |
149 | struct kref kref; | |
150 | struct fw_unit *unit; | |
48f18c76 | 151 | const char *bus_id; |
05cca738 | 152 | struct list_head lu_list; |
5a3c2be6 SR |
153 | |
154 | u64 management_agent_address; | |
155 | int directory_id; | |
156 | int node_id; | |
157 | int address_high; | |
05cca738 | 158 | unsigned int workarounds; |
384170da | 159 | unsigned int mgt_orb_timeout; |
5a3c2be6 SR |
160 | }; |
161 | ||
a4c379c1 JW |
162 | /* |
163 | * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be | |
384170da JW |
164 | * provided in the config rom. Most devices do provide a value, which |
165 | * we'll use for login management orbs, but with some sane limits. | |
a4c379c1 | 166 | */ |
384170da JW |
167 | #define SBP2_MIN_LOGIN_ORB_TIMEOUT 5000U /* Timeout in ms */ |
168 | #define SBP2_MAX_LOGIN_ORB_TIMEOUT 40000U /* Timeout in ms */ | |
05cca738 | 169 | #define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */ |
9ba136d0 | 170 | #define SBP2_ORB_NULL 0x80000000 |
a4c379c1 | 171 | #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 |
9ba136d0 KH |
172 | |
173 | #define SBP2_DIRECTION_TO_MEDIA 0x0 | |
174 | #define SBP2_DIRECTION_FROM_MEDIA 0x1 | |
175 | ||
176 | /* Unit directory keys */ | |
384170da | 177 | #define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a |
5a3c2be6 SR |
178 | #define SBP2_CSR_FIRMWARE_REVISION 0x3c |
179 | #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 | |
180 | #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 | |
9ba136d0 | 181 | |
9ba136d0 KH |
182 | /* Management orb opcodes */ |
183 | #define SBP2_LOGIN_REQUEST 0x0 | |
184 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
185 | #define SBP2_RECONNECT_REQUEST 0x3 | |
186 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
187 | #define SBP2_LOGOUT_REQUEST 0x7 | |
188 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
189 | #define SBP2_ABORT_TASK_SET 0xc | |
190 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
191 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
192 | ||
193 | /* Offsets for command block agent registers */ | |
194 | #define SBP2_AGENT_STATE 0x00 | |
195 | #define SBP2_AGENT_RESET 0x04 | |
196 | #define SBP2_ORB_POINTER 0x08 | |
197 | #define SBP2_DOORBELL 0x10 | |
198 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
199 | ||
200 | /* Status write response codes */ | |
201 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
202 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
203 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
204 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
205 | ||
a77754a7 KH |
206 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
207 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) | |
208 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) | |
209 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) | |
210 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) | |
211 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) | |
212 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) | |
213 | #define STATUS_GET_DATA(v) ((v).data) | |
9ba136d0 KH |
214 | |
215 | struct sbp2_status { | |
216 | u32 status; | |
217 | u32 orb_low; | |
218 | u8 data[24]; | |
219 | }; | |
220 | ||
221 | struct sbp2_pointer { | |
222 | u32 high; | |
223 | u32 low; | |
224 | }; | |
225 | ||
226 | struct sbp2_orb { | |
227 | struct fw_transaction t; | |
e57d2011 | 228 | struct kref kref; |
9ba136d0 KH |
229 | dma_addr_t request_bus; |
230 | int rcode; | |
231 | struct sbp2_pointer pointer; | |
a98e2719 | 232 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
9ba136d0 KH |
233 | struct list_head link; |
234 | }; | |
235 | ||
a77754a7 KH |
236 | #define MANAGEMENT_ORB_LUN(v) ((v)) |
237 | #define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16) | |
238 | #define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20) | |
5cd54c94 | 239 | #define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0) |
a77754a7 KH |
240 | #define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29) |
241 | #define MANAGEMENT_ORB_NOTIFY ((1) << 31) | |
9ba136d0 | 242 | |
a77754a7 KH |
243 | #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) |
244 | #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) | |
9ba136d0 KH |
245 | |
246 | struct sbp2_management_orb { | |
247 | struct sbp2_orb base; | |
248 | struct { | |
249 | struct sbp2_pointer password; | |
250 | struct sbp2_pointer response; | |
251 | u32 misc; | |
252 | u32 length; | |
253 | struct sbp2_pointer status_fifo; | |
254 | } request; | |
255 | __be32 response[4]; | |
256 | dma_addr_t response_bus; | |
257 | struct completion done; | |
258 | struct sbp2_status status; | |
259 | }; | |
260 | ||
a77754a7 KH |
261 | #define LOGIN_RESPONSE_GET_LOGIN_ID(v) ((v).misc & 0xffff) |
262 | #define LOGIN_RESPONSE_GET_LENGTH(v) (((v).misc >> 16) & 0xffff) | |
9ba136d0 KH |
263 | |
264 | struct sbp2_login_response { | |
265 | u32 misc; | |
266 | struct sbp2_pointer command_block_agent; | |
267 | u32 reconnect_hold; | |
268 | }; | |
a77754a7 KH |
269 | #define COMMAND_ORB_DATA_SIZE(v) ((v)) |
270 | #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) | |
271 | #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) | |
272 | #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) | |
273 | #define COMMAND_ORB_SPEED(v) ((v) << 24) | |
274 | #define COMMAND_ORB_DIRECTION(v) ((v) << 27) | |
275 | #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) | |
276 | #define COMMAND_ORB_NOTIFY ((1) << 31) | |
9ba136d0 KH |
277 | |
278 | struct sbp2_command_orb { | |
279 | struct sbp2_orb base; | |
280 | struct { | |
281 | struct sbp2_pointer next; | |
282 | struct sbp2_pointer data_descriptor; | |
283 | u32 misc; | |
284 | u8 command_block[12]; | |
285 | } request; | |
286 | struct scsi_cmnd *cmd; | |
287 | scsi_done_fn_t done; | |
5a3c2be6 | 288 | struct sbp2_logical_unit *lu; |
9ba136d0 | 289 | |
9fb2dd12 | 290 | struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); |
9ba136d0 | 291 | dma_addr_t page_table_bus; |
9ba136d0 KH |
292 | }; |
293 | ||
294 | /* | |
295 | * List of devices with known bugs. | |
296 | * | |
297 | * The firmware_revision field, masked with 0xffff00, is the best | |
298 | * indicator for the type of bridge chip of a device. It yields a few | |
299 | * false positives but this did not break correctly behaving devices | |
300 | * so far. We use ~0 as a wildcard, since the 24 bit values we get | |
301 | * from the config rom can never match that. | |
302 | */ | |
303 | static const struct { | |
304 | u32 firmware_revision; | |
305 | u32 model; | |
05cca738 | 306 | unsigned int workarounds; |
9ba136d0 KH |
307 | } sbp2_workarounds_table[] = { |
308 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
309 | .firmware_revision = 0x002800, | |
310 | .model = 0x001010, | |
311 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
312 | SBP2_WORKAROUND_MODE_SENSE_8, | |
313 | }, | |
9220f194 SR |
314 | /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { |
315 | .firmware_revision = 0x002800, | |
316 | .model = 0x000000, | |
317 | .workarounds = SBP2_WORKAROUND_DELAY_INQUIRY, | |
318 | }, | |
9ba136d0 KH |
319 | /* Initio bridges, actually only needed for some older ones */ { |
320 | .firmware_revision = 0x000200, | |
321 | .model = ~0, | |
322 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
323 | }, | |
324 | /* Symbios bridge */ { | |
325 | .firmware_revision = 0xa0b800, | |
326 | .model = ~0, | |
327 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
328 | }, | |
c781c06d KH |
329 | |
330 | /* | |
331 | * There are iPods (2nd gen, 3rd gen) with model_id == 0, but | |
9ba136d0 KH |
332 | * these iPods do not feature the read_capacity bug according |
333 | * to one report. Read_capacity behaviour as well as model_id | |
c781c06d KH |
334 | * could change due to Apple-supplied firmware updates though. |
335 | */ | |
336 | ||
9ba136d0 KH |
337 | /* iPod 4th generation. */ { |
338 | .firmware_revision = 0x0a2700, | |
339 | .model = 0x000021, | |
340 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
341 | }, | |
342 | /* iPod mini */ { | |
343 | .firmware_revision = 0x0a2700, | |
344 | .model = 0x000023, | |
345 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
346 | }, | |
347 | /* iPod Photo */ { | |
348 | .firmware_revision = 0x0a2700, | |
349 | .model = 0x00007e, | |
350 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
351 | } | |
352 | }; | |
353 | ||
e57d2011 KH |
354 | static void |
355 | free_orb(struct kref *kref) | |
356 | { | |
357 | struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); | |
358 | ||
359 | kfree(orb); | |
360 | } | |
361 | ||
9ba136d0 KH |
362 | static void |
363 | sbp2_status_write(struct fw_card *card, struct fw_request *request, | |
364 | int tcode, int destination, int source, | |
365 | int generation, int speed, | |
366 | unsigned long long offset, | |
367 | void *payload, size_t length, void *callback_data) | |
368 | { | |
5a3c2be6 | 369 | struct sbp2_logical_unit *lu = callback_data; |
9ba136d0 KH |
370 | struct sbp2_orb *orb; |
371 | struct sbp2_status status; | |
372 | size_t header_size; | |
373 | unsigned long flags; | |
374 | ||
375 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
2d826cc5 | 376 | length == 0 || length > sizeof(status)) { |
9ba136d0 KH |
377 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
378 | return; | |
379 | } | |
380 | ||
381 | header_size = min(length, 2 * sizeof(u32)); | |
382 | fw_memcpy_from_be32(&status, payload, header_size); | |
383 | if (length > header_size) | |
384 | memcpy(status.data, payload + 8, length - header_size); | |
a77754a7 | 385 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
9ba136d0 KH |
386 | fw_notify("non-orb related status write, not handled\n"); |
387 | fw_send_response(card, request, RCODE_COMPLETE); | |
388 | return; | |
389 | } | |
390 | ||
391 | /* Lookup the orb corresponding to this status write. */ | |
392 | spin_lock_irqsave(&card->lock, flags); | |
5a3c2be6 | 393 | list_for_each_entry(orb, &lu->orb_list, link) { |
a77754a7 | 394 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
e57d2011 KH |
395 | STATUS_GET_ORB_LOW(status) == orb->request_bus) { |
396 | orb->rcode = RCODE_COMPLETE; | |
9ba136d0 KH |
397 | list_del(&orb->link); |
398 | break; | |
399 | } | |
400 | } | |
401 | spin_unlock_irqrestore(&card->lock, flags); | |
402 | ||
5a3c2be6 | 403 | if (&orb->link != &lu->orb_list) |
9ba136d0 KH |
404 | orb->callback(orb, &status); |
405 | else | |
406 | fw_error("status write for unknown orb\n"); | |
407 | ||
e57d2011 KH |
408 | kref_put(&orb->kref, free_orb); |
409 | ||
9ba136d0 KH |
410 | fw_send_response(card, request, RCODE_COMPLETE); |
411 | } | |
412 | ||
413 | static void | |
414 | complete_transaction(struct fw_card *card, int rcode, | |
415 | void *payload, size_t length, void *data) | |
416 | { | |
417 | struct sbp2_orb *orb = data; | |
418 | unsigned long flags; | |
419 | ||
e57d2011 KH |
420 | /* |
421 | * This is a little tricky. We can get the status write for | |
422 | * the orb before we get this callback. The status write | |
423 | * handler above will assume the orb pointer transaction was | |
424 | * successful and set the rcode to RCODE_COMPLETE for the orb. | |
425 | * So this callback only sets the rcode if it hasn't already | |
426 | * been set and only does the cleanup if the transaction | |
427 | * failed and we didn't already get a status write. | |
428 | */ | |
429 | spin_lock_irqsave(&card->lock, flags); | |
430 | ||
431 | if (orb->rcode == -1) | |
432 | orb->rcode = rcode; | |
433 | if (orb->rcode != RCODE_COMPLETE) { | |
9ba136d0 | 434 | list_del(&orb->link); |
1b34e974 | 435 | spin_unlock_irqrestore(&card->lock, flags); |
9ba136d0 | 436 | orb->callback(orb, NULL); |
1b34e974 SR |
437 | } else { |
438 | spin_unlock_irqrestore(&card->lock, flags); | |
9ba136d0 | 439 | } |
e57d2011 | 440 | |
e57d2011 | 441 | kref_put(&orb->kref, free_orb); |
9ba136d0 KH |
442 | } |
443 | ||
444 | static void | |
5a3c2be6 | 445 | sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, |
9ba136d0 KH |
446 | int node_id, int generation, u64 offset) |
447 | { | |
5a3c2be6 | 448 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 KH |
449 | unsigned long flags; |
450 | ||
451 | orb->pointer.high = 0; | |
452 | orb->pointer.low = orb->request_bus; | |
2d826cc5 | 453 | fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer)); |
9ba136d0 KH |
454 | |
455 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 456 | list_add_tail(&orb->link, &lu->orb_list); |
9ba136d0 KH |
457 | spin_unlock_irqrestore(&device->card->lock, flags); |
458 | ||
e57d2011 KH |
459 | /* Take a ref for the orb list and for the transaction callback. */ |
460 | kref_get(&orb->kref); | |
461 | kref_get(&orb->kref); | |
462 | ||
9ba136d0 | 463 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
f1397490 | 464 | node_id, generation, device->max_speed, offset, |
2d826cc5 | 465 | &orb->pointer, sizeof(orb->pointer), |
9ba136d0 KH |
466 | complete_transaction, orb); |
467 | } | |
468 | ||
5a3c2be6 | 469 | static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |
9ba136d0 | 470 | { |
5a3c2be6 | 471 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 KH |
472 | struct sbp2_orb *orb, *next; |
473 | struct list_head list; | |
474 | unsigned long flags; | |
2aaad97b | 475 | int retval = -ENOENT; |
9ba136d0 KH |
476 | |
477 | INIT_LIST_HEAD(&list); | |
478 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 479 | list_splice_init(&lu->orb_list, &list); |
9ba136d0 KH |
480 | spin_unlock_irqrestore(&device->card->lock, flags); |
481 | ||
482 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 483 | retval = 0; |
730c32f5 KH |
484 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
485 | continue; | |
486 | ||
9ba136d0 KH |
487 | orb->rcode = RCODE_CANCELLED; |
488 | orb->callback(orb, NULL); | |
489 | } | |
9ba136d0 | 490 | |
2aaad97b | 491 | return retval; |
1d3d52c5 KH |
492 | } |
493 | ||
9ba136d0 KH |
494 | static void |
495 | complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
496 | { | |
497 | struct sbp2_management_orb *orb = | |
6f061487 | 498 | container_of(base_orb, struct sbp2_management_orb, base); |
9ba136d0 KH |
499 | |
500 | if (status) | |
2d826cc5 | 501 | memcpy(&orb->status, status, sizeof(*status)); |
9ba136d0 KH |
502 | complete(&orb->done); |
503 | } | |
504 | ||
505 | static int | |
5a3c2be6 SR |
506 | sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id, |
507 | int generation, int function, int lun_or_login_id, | |
508 | void *response) | |
9ba136d0 | 509 | { |
5a3c2be6 | 510 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 | 511 | struct sbp2_management_orb *orb; |
a4c379c1 | 512 | unsigned int timeout; |
9ba136d0 KH |
513 | int retval = -ENOMEM; |
514 | ||
be6f48b0 SR |
515 | if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device)) |
516 | return 0; | |
517 | ||
2d826cc5 | 518 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
519 | if (orb == NULL) |
520 | return -ENOMEM; | |
521 | ||
e57d2011 | 522 | kref_init(&orb->base.kref); |
9ba136d0 KH |
523 | orb->response_bus = |
524 | dma_map_single(device->card->device, &orb->response, | |
2d826cc5 | 525 | sizeof(orb->response), DMA_FROM_DEVICE); |
82eff9db | 526 | if (dma_mapping_error(orb->response_bus)) |
7aa48481 | 527 | goto fail_mapping_response; |
9ba136d0 KH |
528 | |
529 | orb->request.response.high = 0; | |
530 | orb->request.response.low = orb->response_bus; | |
531 | ||
532 | orb->request.misc = | |
a77754a7 KH |
533 | MANAGEMENT_ORB_NOTIFY | |
534 | MANAGEMENT_ORB_FUNCTION(function) | | |
5a3c2be6 | 535 | MANAGEMENT_ORB_LUN(lun_or_login_id); |
9ba136d0 | 536 | orb->request.length = |
2d826cc5 | 537 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)); |
9ba136d0 | 538 | |
5a3c2be6 SR |
539 | orb->request.status_fifo.high = lu->address_handler.offset >> 32; |
540 | orb->request.status_fifo.low = lu->address_handler.offset; | |
9ba136d0 | 541 | |
9ba136d0 | 542 | if (function == SBP2_LOGIN_REQUEST) { |
14dc992a | 543 | /* Ask for 2^2 == 4 seconds reconnect grace period */ |
9ba136d0 | 544 | orb->request.misc |= |
14dc992a SR |
545 | MANAGEMENT_ORB_RECONNECT(2) | |
546 | MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login); | |
384170da | 547 | timeout = lu->tgt->mgt_orb_timeout; |
a4c379c1 JW |
548 | } else { |
549 | timeout = SBP2_ORB_TIMEOUT; | |
9ba136d0 KH |
550 | } |
551 | ||
2d826cc5 | 552 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); |
9ba136d0 KH |
553 | |
554 | init_completion(&orb->done); | |
555 | orb->base.callback = complete_management_orb; | |
2aaad97b | 556 | |
7aa48481 SR |
557 | orb->base.request_bus = |
558 | dma_map_single(device->card->device, &orb->request, | |
559 | sizeof(orb->request), DMA_TO_DEVICE); | |
560 | if (dma_mapping_error(orb->base.request_bus)) | |
561 | goto fail_mapping_request; | |
562 | ||
5a3c2be6 SR |
563 | sbp2_send_orb(&orb->base, lu, node_id, generation, |
564 | lu->tgt->management_agent_address); | |
9ba136d0 | 565 | |
a4c379c1 | 566 | wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout)); |
9ba136d0 | 567 | |
9ba136d0 | 568 | retval = -EIO; |
5a3c2be6 | 569 | if (sbp2_cancel_orbs(lu) == 0) { |
48f18c76 SR |
570 | fw_error("%s: orb reply timed out, rcode=0x%02x\n", |
571 | lu->tgt->bus_id, orb->base.rcode); | |
9ba136d0 KH |
572 | goto out; |
573 | } | |
574 | ||
2aaad97b | 575 | if (orb->base.rcode != RCODE_COMPLETE) { |
48f18c76 SR |
576 | fw_error("%s: management write failed, rcode 0x%02x\n", |
577 | lu->tgt->bus_id, orb->base.rcode); | |
9ba136d0 KH |
578 | goto out; |
579 | } | |
580 | ||
a77754a7 KH |
581 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
582 | STATUS_GET_SBP_STATUS(orb->status) != 0) { | |
48f18c76 | 583 | fw_error("%s: error status: %d:%d\n", lu->tgt->bus_id, |
a77754a7 KH |
584 | STATUS_GET_RESPONSE(orb->status), |
585 | STATUS_GET_SBP_STATUS(orb->status)); | |
9ba136d0 KH |
586 | goto out; |
587 | } | |
588 | ||
589 | retval = 0; | |
590 | out: | |
591 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 592 | sizeof(orb->request), DMA_TO_DEVICE); |
7aa48481 | 593 | fail_mapping_request: |
9ba136d0 | 594 | dma_unmap_single(device->card->device, orb->response_bus, |
2d826cc5 | 595 | sizeof(orb->response), DMA_FROM_DEVICE); |
7aa48481 | 596 | fail_mapping_response: |
9ba136d0 KH |
597 | if (response) |
598 | fw_memcpy_from_be32(response, | |
2d826cc5 | 599 | orb->response, sizeof(orb->response)); |
e57d2011 | 600 | kref_put(&orb->base.kref, free_orb); |
9ba136d0 KH |
601 | |
602 | return retval; | |
603 | } | |
604 | ||
605 | static void | |
606 | complete_agent_reset_write(struct fw_card *card, int rcode, | |
e0e60215 | 607 | void *payload, size_t length, void *done) |
9ba136d0 | 608 | { |
e0e60215 SR |
609 | complete(done); |
610 | } | |
611 | ||
612 | static void sbp2_agent_reset(struct sbp2_logical_unit *lu) | |
613 | { | |
614 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); | |
615 | DECLARE_COMPLETION_ONSTACK(done); | |
616 | struct fw_transaction t; | |
617 | static u32 z; | |
9ba136d0 | 618 | |
e0e60215 SR |
619 | fw_send_request(device->card, &t, TCODE_WRITE_QUADLET_REQUEST, |
620 | lu->tgt->node_id, lu->generation, device->max_speed, | |
621 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
622 | &z, sizeof(z), complete_agent_reset_write, &done); | |
623 | wait_for_completion(&done); | |
9ba136d0 KH |
624 | } |
625 | ||
e0e60215 SR |
626 | static void |
627 | complete_agent_reset_write_no_wait(struct fw_card *card, int rcode, | |
628 | void *payload, size_t length, void *data) | |
629 | { | |
630 | kfree(data); | |
631 | } | |
632 | ||
633 | static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu) | |
9ba136d0 | 634 | { |
5a3c2be6 | 635 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 | 636 | struct fw_transaction *t; |
e0e60215 | 637 | static u32 z; |
9ba136d0 | 638 | |
e0e60215 | 639 | t = kmalloc(sizeof(*t), GFP_ATOMIC); |
9ba136d0 | 640 | if (t == NULL) |
e0e60215 | 641 | return; |
9ba136d0 KH |
642 | |
643 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
5a3c2be6 SR |
644 | lu->tgt->node_id, lu->generation, device->max_speed, |
645 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
e0e60215 | 646 | &z, sizeof(z), complete_agent_reset_write_no_wait, t); |
9ba136d0 KH |
647 | } |
648 | ||
5a3c2be6 | 649 | static void sbp2_release_target(struct kref *kref) |
b3d6e151 | 650 | { |
5a3c2be6 SR |
651 | struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref); |
652 | struct sbp2_logical_unit *lu, *next; | |
653 | struct Scsi_Host *shost = | |
654 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
655 | ||
656 | list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { | |
657 | if (lu->sdev) | |
658 | scsi_remove_device(lu->sdev); | |
659 | ||
be6f48b0 SR |
660 | sbp2_send_management_orb(lu, tgt->node_id, lu->generation, |
661 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
4dccd020 | 662 | |
5a3c2be6 SR |
663 | fw_core_remove_address_handler(&lu->address_handler); |
664 | list_del(&lu->link); | |
665 | kfree(lu); | |
666 | } | |
667 | scsi_remove_host(shost); | |
48f18c76 | 668 | fw_notify("released %s\n", tgt->bus_id); |
5a3c2be6 SR |
669 | |
670 | put_device(&tgt->unit->device); | |
671 | scsi_host_put(shost); | |
b3d6e151 KH |
672 | } |
673 | ||
df8ec249 SR |
674 | static struct workqueue_struct *sbp2_wq; |
675 | ||
285838eb SR |
676 | /* |
677 | * Always get the target's kref when scheduling work on one its units. | |
678 | * Each workqueue job is responsible to call sbp2_target_put() upon return. | |
679 | */ | |
680 | static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay) | |
681 | { | |
682 | if (queue_delayed_work(sbp2_wq, &lu->work, delay)) | |
683 | kref_get(&lu->tgt->kref); | |
684 | } | |
685 | ||
686 | static void sbp2_target_put(struct sbp2_target *tgt) | |
687 | { | |
688 | kref_put(&tgt->kref, sbp2_release_target); | |
689 | } | |
690 | ||
5a3c2be6 SR |
691 | static void sbp2_reconnect(struct work_struct *work); |
692 | ||
7f37c426 KH |
693 | static void sbp2_login(struct work_struct *work) |
694 | { | |
5a3c2be6 SR |
695 | struct sbp2_logical_unit *lu = |
696 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 SR |
697 | struct sbp2_target *tgt = lu->tgt; |
698 | struct fw_device *device = fw_device(tgt->unit->device.parent); | |
699 | struct Scsi_Host *shost; | |
5a3c2be6 SR |
700 | struct scsi_device *sdev; |
701 | struct scsi_lun eight_bytes_lun; | |
7f37c426 | 702 | struct sbp2_login_response response; |
5a3c2be6 | 703 | int generation, node_id, local_node_id; |
7f37c426 | 704 | |
be6f48b0 SR |
705 | if (fw_device_is_shutdown(device)) |
706 | goto out; | |
707 | ||
5a8a1bcd | 708 | generation = device->generation; |
b5d2a5e0 | 709 | smp_rmb(); /* node_id must not be older than generation */ |
5a8a1bcd SR |
710 | node_id = device->node_id; |
711 | local_node_id = device->card->node_id; | |
7f37c426 | 712 | |
5a3c2be6 SR |
713 | if (sbp2_send_management_orb(lu, node_id, generation, |
714 | SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { | |
285838eb SR |
715 | if (lu->retries++ < 5) |
716 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); | |
717 | else | |
48f18c76 SR |
718 | fw_error("%s: failed to login to LUN %04x\n", |
719 | tgt->bus_id, lu->lun); | |
285838eb | 720 | goto out; |
7f37c426 KH |
721 | } |
722 | ||
48f18c76 SR |
723 | lu->generation = generation; |
724 | tgt->node_id = node_id; | |
725 | tgt->address_high = local_node_id << 16; | |
7f37c426 KH |
726 | |
727 | /* Get command block agent offset and login id. */ | |
5a3c2be6 | 728 | lu->command_block_agent_address = |
5c5539d8 | 729 | ((u64) (response.command_block_agent.high & 0xffff) << 32) | |
7f37c426 | 730 | response.command_block_agent.low; |
5a3c2be6 | 731 | lu->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response); |
7f37c426 | 732 | |
48f18c76 SR |
733 | fw_notify("%s: logged in to LUN %04x (%d retries)\n", |
734 | tgt->bus_id, lu->lun, lu->retries); | |
7f37c426 KH |
735 | |
736 | #if 0 | |
737 | /* FIXME: The linux1394 sbp2 does this last step. */ | |
738 | sbp2_set_busy_timeout(scsi_id); | |
739 | #endif | |
740 | ||
5a3c2be6 SR |
741 | PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect); |
742 | sbp2_agent_reset(lu); | |
743 | ||
0fa6dfdb SR |
744 | /* This was a re-login. */ |
745 | if (lu->sdev) { | |
746 | sbp2_cancel_orbs(lu); | |
747 | goto out; | |
748 | } | |
749 | ||
9220f194 SR |
750 | if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) |
751 | ssleep(SBP2_INQUIRY_DELAY); | |
752 | ||
5a3c2be6 SR |
753 | memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); |
754 | eight_bytes_lun.scsi_lun[0] = (lu->lun >> 8) & 0xff; | |
755 | eight_bytes_lun.scsi_lun[1] = lu->lun & 0xff; | |
48f18c76 | 756 | shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
7f37c426 | 757 | |
5a3c2be6 SR |
758 | sdev = __scsi_add_device(shost, 0, 0, |
759 | scsilun_to_int(&eight_bytes_lun), lu); | |
760 | if (IS_ERR(sdev)) { | |
1b9c12ba SR |
761 | smp_rmb(); /* generation may have changed */ |
762 | generation = device->generation; | |
763 | smp_rmb(); /* node_id must not be older than generation */ | |
764 | ||
765 | sbp2_send_management_orb(lu, device->node_id, generation, | |
5a3c2be6 | 766 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); |
c781c06d KH |
767 | /* |
768 | * Set this back to sbp2_login so we fall back and | |
769 | * retry login on bus reset. | |
770 | */ | |
5a3c2be6 SR |
771 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); |
772 | } else { | |
773 | lu->sdev = sdev; | |
774 | scsi_device_put(sdev); | |
7f37c426 | 775 | } |
285838eb | 776 | out: |
48f18c76 | 777 | sbp2_target_put(tgt); |
7f37c426 | 778 | } |
9ba136d0 | 779 | |
5a3c2be6 | 780 | static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) |
9ba136d0 | 781 | { |
5a3c2be6 | 782 | struct sbp2_logical_unit *lu; |
9ba136d0 | 783 | |
5a3c2be6 SR |
784 | lu = kmalloc(sizeof(*lu), GFP_KERNEL); |
785 | if (!lu) | |
786 | return -ENOMEM; | |
9ba136d0 | 787 | |
5a3c2be6 SR |
788 | lu->address_handler.length = 0x100; |
789 | lu->address_handler.address_callback = sbp2_status_write; | |
790 | lu->address_handler.callback_data = lu; | |
9ba136d0 | 791 | |
5a3c2be6 SR |
792 | if (fw_core_add_address_handler(&lu->address_handler, |
793 | &fw_high_memory_region) < 0) { | |
794 | kfree(lu); | |
795 | return -ENOMEM; | |
796 | } | |
9ba136d0 | 797 | |
5a3c2be6 SR |
798 | lu->tgt = tgt; |
799 | lu->sdev = NULL; | |
800 | lu->lun = lun_entry & 0xffff; | |
801 | lu->retries = 0; | |
802 | INIT_LIST_HEAD(&lu->orb_list); | |
803 | INIT_DELAYED_WORK(&lu->work, sbp2_login); | |
9ba136d0 | 804 | |
5a3c2be6 SR |
805 | list_add_tail(&lu->link, &tgt->lu_list); |
806 | return 0; | |
807 | } | |
ad85274f | 808 | |
5a3c2be6 SR |
809 | static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory) |
810 | { | |
811 | struct fw_csr_iterator ci; | |
812 | int key, value; | |
9ba136d0 | 813 | |
5a3c2be6 SR |
814 | fw_csr_iterator_init(&ci, directory); |
815 | while (fw_csr_iterator_next(&ci, &key, &value)) | |
816 | if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && | |
817 | sbp2_add_logical_unit(tgt, value) < 0) | |
818 | return -ENOMEM; | |
819 | return 0; | |
820 | } | |
821 | ||
822 | static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory, | |
823 | u32 *model, u32 *firmware_revision) | |
824 | { | |
825 | struct fw_csr_iterator ci; | |
826 | int key, value; | |
384170da | 827 | unsigned int timeout; |
5a3c2be6 SR |
828 | |
829 | fw_csr_iterator_init(&ci, directory); | |
9ba136d0 KH |
830 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
831 | switch (key) { | |
5a3c2be6 | 832 | |
9ba136d0 | 833 | case CSR_DEPENDENT_INFO | CSR_OFFSET: |
5a3c2be6 SR |
834 | tgt->management_agent_address = |
835 | CSR_REGISTER_BASE + 4 * value; | |
9ba136d0 | 836 | break; |
5a3c2be6 SR |
837 | |
838 | case CSR_DIRECTORY_ID: | |
839 | tgt->directory_id = value; | |
9ba136d0 | 840 | break; |
5a3c2be6 | 841 | |
9ba136d0 | 842 | case CSR_MODEL: |
5a3c2be6 SR |
843 | *model = value; |
844 | break; | |
845 | ||
846 | case SBP2_CSR_FIRMWARE_REVISION: | |
847 | *firmware_revision = value; | |
848 | break; | |
849 | ||
384170da JW |
850 | case SBP2_CSR_UNIT_CHARACTERISTICS: |
851 | /* the timeout value is stored in 500ms units */ | |
852 | timeout = ((unsigned int) value >> 8 & 0xff) * 500; | |
853 | timeout = max(timeout, SBP2_MIN_LOGIN_ORB_TIMEOUT); | |
854 | tgt->mgt_orb_timeout = | |
855 | min(timeout, SBP2_MAX_LOGIN_ORB_TIMEOUT); | |
856 | ||
857 | if (timeout > tgt->mgt_orb_timeout) | |
858 | fw_notify("%s: config rom contains %ds " | |
859 | "management ORB timeout, limiting " | |
48f18c76 | 860 | "to %ds\n", tgt->bus_id, |
384170da JW |
861 | timeout / 1000, |
862 | tgt->mgt_orb_timeout / 1000); | |
863 | break; | |
864 | ||
5a3c2be6 SR |
865 | case SBP2_CSR_LOGICAL_UNIT_NUMBER: |
866 | if (sbp2_add_logical_unit(tgt, value) < 0) | |
867 | return -ENOMEM; | |
868 | break; | |
869 | ||
870 | case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: | |
871 | if (sbp2_scan_logical_unit_dir(tgt, ci.p + value) < 0) | |
872 | return -ENOMEM; | |
9ba136d0 KH |
873 | break; |
874 | } | |
875 | } | |
5a3c2be6 SR |
876 | return 0; |
877 | } | |
878 | ||
879 | static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, | |
880 | u32 firmware_revision) | |
881 | { | |
882 | int i; | |
05cca738 | 883 | unsigned int w = sbp2_param_workarounds; |
2df222b8 SR |
884 | |
885 | if (w) | |
886 | fw_notify("Please notify linux1394-devel@lists.sourceforge.net " | |
887 | "if you need the workarounds parameter for %s\n", | |
48f18c76 | 888 | tgt->bus_id); |
5a3c2be6 | 889 | |
2df222b8 SR |
890 | if (w & SBP2_WORKAROUND_OVERRIDE) |
891 | goto out; | |
9ba136d0 KH |
892 | |
893 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
5a3c2be6 | 894 | |
9ba136d0 KH |
895 | if (sbp2_workarounds_table[i].firmware_revision != |
896 | (firmware_revision & 0xffffff00)) | |
897 | continue; | |
5a3c2be6 | 898 | |
9ba136d0 KH |
899 | if (sbp2_workarounds_table[i].model != model && |
900 | sbp2_workarounds_table[i].model != ~0) | |
901 | continue; | |
5a3c2be6 | 902 | |
2df222b8 | 903 | w |= sbp2_workarounds_table[i].workarounds; |
9ba136d0 KH |
904 | break; |
905 | } | |
2df222b8 SR |
906 | out: |
907 | if (w) | |
5a3c2be6 | 908 | fw_notify("Workarounds for %s: 0x%x " |
9ba136d0 | 909 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", |
48f18c76 | 910 | tgt->bus_id, w, firmware_revision, model); |
2df222b8 | 911 | tgt->workarounds = w; |
5a3c2be6 SR |
912 | } |
913 | ||
914 | static struct scsi_host_template scsi_driver_template; | |
915 | ||
916 | static int sbp2_probe(struct device *dev) | |
917 | { | |
918 | struct fw_unit *unit = fw_unit(dev); | |
919 | struct fw_device *device = fw_device(unit->device.parent); | |
920 | struct sbp2_target *tgt; | |
921 | struct sbp2_logical_unit *lu; | |
922 | struct Scsi_Host *shost; | |
923 | u32 model, firmware_revision; | |
924 | ||
925 | shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); | |
926 | if (shost == NULL) | |
927 | return -ENOMEM; | |
928 | ||
929 | tgt = (struct sbp2_target *)shost->hostdata; | |
930 | unit->device.driver_data = tgt; | |
931 | tgt->unit = unit; | |
932 | kref_init(&tgt->kref); | |
933 | INIT_LIST_HEAD(&tgt->lu_list); | |
48f18c76 | 934 | tgt->bus_id = unit->device.bus_id; |
5a3c2be6 SR |
935 | |
936 | if (fw_device_enable_phys_dma(device) < 0) | |
937 | goto fail_shost_put; | |
938 | ||
939 | if (scsi_add_host(shost, &unit->device) < 0) | |
940 | goto fail_shost_put; | |
941 | ||
942 | /* Initialize to values that won't match anything in our table. */ | |
943 | firmware_revision = 0xff000000; | |
944 | model = 0xff000000; | |
945 | ||
946 | /* implicit directory ID */ | |
947 | tgt->directory_id = ((unit->directory - device->config_rom) * 4 | |
948 | + CSR_CONFIG_ROM) & 0xffffff; | |
949 | ||
950 | if (sbp2_scan_unit_dir(tgt, unit->directory, &model, | |
951 | &firmware_revision) < 0) | |
952 | goto fail_tgt_put; | |
953 | ||
954 | sbp2_init_workarounds(tgt, model, firmware_revision); | |
9ba136d0 | 955 | |
b3d6e151 KH |
956 | get_device(&unit->device); |
957 | ||
285838eb | 958 | /* Do the login in a workqueue so we can easily reschedule retries. */ |
5a3c2be6 | 959 | list_for_each_entry(lu, &tgt->lu_list, link) |
285838eb | 960 | sbp2_queue_work(lu, 0); |
9ba136d0 | 961 | return 0; |
ad85274f | 962 | |
5a3c2be6 | 963 | fail_tgt_put: |
285838eb | 964 | sbp2_target_put(tgt); |
5a3c2be6 SR |
965 | return -ENOMEM; |
966 | ||
967 | fail_shost_put: | |
968 | scsi_host_put(shost); | |
969 | return -ENOMEM; | |
9ba136d0 KH |
970 | } |
971 | ||
972 | static int sbp2_remove(struct device *dev) | |
973 | { | |
974 | struct fw_unit *unit = fw_unit(dev); | |
5a3c2be6 | 975 | struct sbp2_target *tgt = unit->device.driver_data; |
9ba136d0 | 976 | |
285838eb | 977 | sbp2_target_put(tgt); |
9ba136d0 KH |
978 | return 0; |
979 | } | |
980 | ||
981 | static void sbp2_reconnect(struct work_struct *work) | |
982 | { | |
5a3c2be6 SR |
983 | struct sbp2_logical_unit *lu = |
984 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 SR |
985 | struct sbp2_target *tgt = lu->tgt; |
986 | struct fw_device *device = fw_device(tgt->unit->device.parent); | |
9ba136d0 KH |
987 | int generation, node_id, local_node_id; |
988 | ||
be6f48b0 SR |
989 | if (fw_device_is_shutdown(device)) |
990 | goto out; | |
991 | ||
5a8a1bcd | 992 | generation = device->generation; |
b5d2a5e0 | 993 | smp_rmb(); /* node_id must not be older than generation */ |
5a8a1bcd SR |
994 | node_id = device->node_id; |
995 | local_node_id = device->card->node_id; | |
9ba136d0 | 996 | |
5a3c2be6 | 997 | if (sbp2_send_management_orb(lu, node_id, generation, |
7f37c426 | 998 | SBP2_RECONNECT_REQUEST, |
5a3c2be6 SR |
999 | lu->login_id, NULL) < 0) { |
1000 | if (lu->retries++ >= 5) { | |
48f18c76 | 1001 | fw_error("%s: failed to reconnect\n", tgt->bus_id); |
7f37c426 | 1002 | /* Fall back and try to log in again. */ |
5a3c2be6 SR |
1003 | lu->retries = 0; |
1004 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); | |
7f37c426 | 1005 | } |
285838eb SR |
1006 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
1007 | goto out; | |
7f37c426 | 1008 | } |
9ba136d0 | 1009 | |
48f18c76 SR |
1010 | lu->generation = generation; |
1011 | tgt->node_id = node_id; | |
1012 | tgt->address_high = local_node_id << 16; | |
7f37c426 | 1013 | |
48f18c76 SR |
1014 | fw_notify("%s: reconnected to LUN %04x (%d retries)\n", |
1015 | tgt->bus_id, lu->lun, lu->retries); | |
5a3c2be6 SR |
1016 | |
1017 | sbp2_agent_reset(lu); | |
1018 | sbp2_cancel_orbs(lu); | |
285838eb | 1019 | out: |
48f18c76 | 1020 | sbp2_target_put(tgt); |
9ba136d0 KH |
1021 | } |
1022 | ||
1023 | static void sbp2_update(struct fw_unit *unit) | |
1024 | { | |
5a3c2be6 SR |
1025 | struct sbp2_target *tgt = unit->device.driver_data; |
1026 | struct sbp2_logical_unit *lu; | |
9ba136d0 | 1027 | |
5a3c2be6 SR |
1028 | fw_device_enable_phys_dma(fw_device(unit->device.parent)); |
1029 | ||
1030 | /* | |
1031 | * Fw-core serializes sbp2_update() against sbp2_remove(). | |
1032 | * Iteration over tgt->lu_list is therefore safe here. | |
1033 | */ | |
1034 | list_for_each_entry(lu, &tgt->lu_list, link) { | |
1035 | lu->retries = 0; | |
285838eb | 1036 | sbp2_queue_work(lu, 0); |
5a3c2be6 | 1037 | } |
9ba136d0 KH |
1038 | } |
1039 | ||
1040 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
1041 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
1042 | ||
21ebcd12 | 1043 | static const struct fw_device_id sbp2_id_table[] = { |
9ba136d0 KH |
1044 | { |
1045 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, | |
1046 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, | |
5af4e5ea | 1047 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
1048 | }, |
1049 | { } | |
1050 | }; | |
1051 | ||
1052 | static struct fw_driver sbp2_driver = { | |
1053 | .driver = { | |
1054 | .owner = THIS_MODULE, | |
1055 | .name = sbp2_driver_name, | |
1056 | .bus = &fw_bus_type, | |
1057 | .probe = sbp2_probe, | |
1058 | .remove = sbp2_remove, | |
1059 | }, | |
1060 | .update = sbp2_update, | |
1061 | .id_table = sbp2_id_table, | |
1062 | }; | |
1063 | ||
fbb5423c KH |
1064 | static unsigned int |
1065 | sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) | |
9ba136d0 | 1066 | { |
fbb5423c KH |
1067 | int sam_status; |
1068 | ||
9ba136d0 KH |
1069 | sense_data[0] = 0x70; |
1070 | sense_data[1] = 0x0; | |
1071 | sense_data[2] = sbp2_status[1]; | |
1072 | sense_data[3] = sbp2_status[4]; | |
1073 | sense_data[4] = sbp2_status[5]; | |
1074 | sense_data[5] = sbp2_status[6]; | |
1075 | sense_data[6] = sbp2_status[7]; | |
1076 | sense_data[7] = 10; | |
1077 | sense_data[8] = sbp2_status[8]; | |
1078 | sense_data[9] = sbp2_status[9]; | |
1079 | sense_data[10] = sbp2_status[10]; | |
1080 | sense_data[11] = sbp2_status[11]; | |
1081 | sense_data[12] = sbp2_status[2]; | |
1082 | sense_data[13] = sbp2_status[3]; | |
1083 | sense_data[14] = sbp2_status[12]; | |
1084 | sense_data[15] = sbp2_status[13]; | |
1085 | ||
fbb5423c | 1086 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 1087 | |
fbb5423c KH |
1088 | switch (sam_status) { |
1089 | case SAM_STAT_GOOD: | |
9ba136d0 | 1090 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 1091 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 1092 | case SAM_STAT_BUSY: |
9ba136d0 KH |
1093 | case SAM_STAT_RESERVATION_CONFLICT: |
1094 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
1095 | return DID_OK << 16 | sam_status; |
1096 | ||
9ba136d0 | 1097 | default: |
fbb5423c | 1098 | return DID_ERROR << 16; |
9ba136d0 KH |
1099 | } |
1100 | } | |
1101 | ||
1102 | static void | |
1103 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
1104 | { | |
6f061487 JF |
1105 | struct sbp2_command_orb *orb = |
1106 | container_of(base_orb, struct sbp2_command_orb, base); | |
5a3c2be6 | 1107 | struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent); |
9ba136d0 KH |
1108 | int result; |
1109 | ||
1110 | if (status != NULL) { | |
a77754a7 | 1111 | if (STATUS_GET_DEAD(*status)) |
e0e60215 | 1112 | sbp2_agent_reset_no_wait(orb->lu); |
9ba136d0 | 1113 | |
a77754a7 | 1114 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 1115 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 1116 | result = DID_OK << 16; |
9ba136d0 KH |
1117 | break; |
1118 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 1119 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
1120 | break; |
1121 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
1122 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
1123 | default: | |
fbb5423c | 1124 | result = DID_ERROR << 16; |
9ba136d0 KH |
1125 | break; |
1126 | } | |
1127 | ||
a77754a7 KH |
1128 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
1129 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
1130 | orb->cmd->sense_buffer); |
1131 | } else { | |
c781c06d KH |
1132 | /* |
1133 | * If the orb completes with status == NULL, something | |
9ba136d0 | 1134 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
1135 | * or when sending the write (less likely). |
1136 | */ | |
fbb5423c | 1137 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
1138 | } |
1139 | ||
1140 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 1141 | sizeof(orb->request), DMA_TO_DEVICE); |
9ba136d0 | 1142 | |
412edf65 SR |
1143 | if (scsi_sg_count(orb->cmd) > 0) |
1144 | dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd), | |
1145 | scsi_sg_count(orb->cmd), | |
9ba136d0 | 1146 | orb->cmd->sc_data_direction); |
9ba136d0 KH |
1147 | |
1148 | if (orb->page_table_bus != 0) | |
1149 | dma_unmap_single(device->card->device, orb->page_table_bus, | |
b4be016a | 1150 | sizeof(orb->page_table), DMA_TO_DEVICE); |
9ba136d0 | 1151 | |
fbb5423c | 1152 | orb->cmd->result = result; |
9ba136d0 | 1153 | orb->done(orb->cmd); |
9ba136d0 KH |
1154 | } |
1155 | ||
5a3c2be6 SR |
1156 | static int |
1157 | sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device, | |
1158 | struct sbp2_logical_unit *lu) | |
9ba136d0 | 1159 | { |
9ba136d0 KH |
1160 | struct scatterlist *sg; |
1161 | int sg_len, l, i, j, count; | |
9ba136d0 KH |
1162 | dma_addr_t sg_addr; |
1163 | ||
412edf65 SR |
1164 | sg = scsi_sglist(orb->cmd); |
1165 | count = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd), | |
9ba136d0 | 1166 | orb->cmd->sc_data_direction); |
95ffc5e3 KH |
1167 | if (count == 0) |
1168 | goto fail; | |
9ba136d0 | 1169 | |
c781c06d KH |
1170 | /* |
1171 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
1172 | * the scatter list by converting it to an immediate block |
1173 | * request. This is also a workaround for broken devices such | |
1174 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
1175 | * tables. |
1176 | */ | |
9ba136d0 | 1177 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { |
5a3c2be6 | 1178 | orb->request.data_descriptor.high = lu->tgt->address_high; |
9ba136d0 | 1179 | orb->request.data_descriptor.low = sg_dma_address(sg); |
5a3c2be6 | 1180 | orb->request.misc |= COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)); |
95ffc5e3 | 1181 | return 0; |
9ba136d0 KH |
1182 | } |
1183 | ||
c781c06d KH |
1184 | /* |
1185 | * Convert the scatterlist to an sbp2 page table. If any | |
36abb3b1 KHSR |
1186 | * scatterlist entries are too big for sbp2, we split them as we |
1187 | * go. Even if we ask the block I/O layer to not give us sg | |
1188 | * elements larger than 65535 bytes, some IOMMUs may merge sg elements | |
1189 | * during DMA mapping, and Linux currently doesn't prevent this. | |
c781c06d | 1190 | */ |
b7811da2 SR |
1191 | for (i = 0, j = 0; i < count; i++, sg = sg_next(sg)) { |
1192 | sg_len = sg_dma_len(sg); | |
1193 | sg_addr = sg_dma_address(sg); | |
9ba136d0 | 1194 | while (sg_len) { |
332ef331 SR |
1195 | /* FIXME: This won't get us out of the pinch. */ |
1196 | if (unlikely(j >= ARRAY_SIZE(orb->page_table))) { | |
1197 | fw_error("page table overflow\n"); | |
1198 | goto fail_page_table; | |
1199 | } | |
9ba136d0 KH |
1200 | l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH); |
1201 | orb->page_table[j].low = sg_addr; | |
1202 | orb->page_table[j].high = (l << 16); | |
1203 | sg_addr += l; | |
1204 | sg_len -= l; | |
1205 | j++; | |
1206 | } | |
1207 | } | |
1208 | ||
b4be016a SR |
1209 | fw_memcpy_to_be32(orb->page_table, orb->page_table, |
1210 | sizeof(orb->page_table[0]) * j); | |
1211 | orb->page_table_bus = | |
1212 | dma_map_single(device->card->device, orb->page_table, | |
1213 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
1214 | if (dma_mapping_error(orb->page_table_bus)) | |
1215 | goto fail_page_table; | |
9ba136d0 | 1216 | |
c781c06d KH |
1217 | /* |
1218 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
1219 | * to fill in the node ID part of the address. All other |
1220 | * pointers assume that the data referenced reside on the | |
1221 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
1222 | * on other nodes so we need to put our ID in descriptor.high. |
1223 | */ | |
5a3c2be6 | 1224 | orb->request.data_descriptor.high = lu->tgt->address_high; |
9ba136d0 KH |
1225 | orb->request.data_descriptor.low = orb->page_table_bus; |
1226 | orb->request.misc |= | |
a77754a7 KH |
1227 | COMMAND_ORB_PAGE_TABLE_PRESENT | |
1228 | COMMAND_ORB_DATA_SIZE(j); | |
9ba136d0 | 1229 | |
95ffc5e3 KH |
1230 | return 0; |
1231 | ||
1232 | fail_page_table: | |
412edf65 | 1233 | dma_unmap_sg(device->card->device, sg, scsi_sg_count(orb->cmd), |
95ffc5e3 KH |
1234 | orb->cmd->sc_data_direction); |
1235 | fail: | |
1236 | return -ENOMEM; | |
9ba136d0 KH |
1237 | } |
1238 | ||
9ba136d0 KH |
1239 | /* SCSI stack integration */ |
1240 | ||
1241 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |
1242 | { | |
5a3c2be6 SR |
1243 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
1244 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); | |
9ba136d0 | 1245 | struct sbp2_command_orb *orb; |
05cca738 | 1246 | unsigned int max_payload; |
5a3c2be6 | 1247 | int retval = SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1248 | |
c781c06d KH |
1249 | /* |
1250 | * Bidirectional commands are not yet implemented, and unknown | |
1251 | * transfer direction not handled. | |
1252 | */ | |
9ba136d0 | 1253 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
8a8cea27 | 1254 | fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n"); |
e1b68c4d KH |
1255 | cmd->result = DID_ERROR << 16; |
1256 | done(cmd); | |
1257 | return 0; | |
9ba136d0 KH |
1258 | } |
1259 | ||
2d826cc5 | 1260 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
1261 | if (orb == NULL) { |
1262 | fw_notify("failed to alloc orb\n"); | |
5a3c2be6 | 1263 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 KH |
1264 | } |
1265 | ||
12f26aa1 KH |
1266 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
1267 | orb->base.rcode = -1; | |
e57d2011 | 1268 | kref_init(&orb->base.kref); |
9ba136d0 | 1269 | |
5a3c2be6 | 1270 | orb->lu = lu; |
9ba136d0 KH |
1271 | orb->done = done; |
1272 | orb->cmd = cmd; | |
1273 | ||
1274 | orb->request.next.high = SBP2_ORB_NULL; | |
1275 | orb->request.next.low = 0x0; | |
c781c06d KH |
1276 | /* |
1277 | * At speed 100 we can do 512 bytes per packet, at speed 200, | |
9ba136d0 KH |
1278 | * 1024 bytes per packet etc. The SBP-2 max_payload field |
1279 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
c781c06d KH |
1280 | * if we set this to max_speed + 7, we get the right value. |
1281 | */ | |
25659f71 SR |
1282 | max_payload = min(device->max_speed + 7, |
1283 | device->card->max_receive - 1); | |
9ba136d0 | 1284 | orb->request.misc = |
25659f71 | 1285 | COMMAND_ORB_MAX_PAYLOAD(max_payload) | |
f1397490 | 1286 | COMMAND_ORB_SPEED(device->max_speed) | |
a77754a7 | 1287 | COMMAND_ORB_NOTIFY; |
9ba136d0 KH |
1288 | |
1289 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
1290 | orb->request.misc |= | |
a77754a7 | 1291 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_FROM_MEDIA); |
9ba136d0 KH |
1292 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) |
1293 | orb->request.misc |= | |
a77754a7 | 1294 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA); |
9ba136d0 | 1295 | |
5a3c2be6 SR |
1296 | if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) |
1297 | goto out; | |
9ba136d0 | 1298 | |
2d826cc5 | 1299 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); |
9ba136d0 KH |
1300 | |
1301 | memset(orb->request.command_block, | |
2d826cc5 | 1302 | 0, sizeof(orb->request.command_block)); |
9ba136d0 KH |
1303 | memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); |
1304 | ||
1305 | orb->base.callback = complete_command_orb; | |
8526392a SR |
1306 | orb->base.request_bus = |
1307 | dma_map_single(device->card->device, &orb->request, | |
1308 | sizeof(orb->request), DMA_TO_DEVICE); | |
1309 | if (dma_mapping_error(orb->base.request_bus)) | |
5a3c2be6 | 1310 | goto out; |
82eff9db | 1311 | |
5a3c2be6 SR |
1312 | sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, lu->generation, |
1313 | lu->command_block_agent_address + SBP2_ORB_POINTER); | |
1314 | retval = 0; | |
1315 | out: | |
e57d2011 | 1316 | kref_put(&orb->base.kref, free_orb); |
5a3c2be6 | 1317 | return retval; |
9ba136d0 KH |
1318 | } |
1319 | ||
cfb01381 SR |
1320 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1321 | { | |
5a3c2be6 | 1322 | struct sbp2_logical_unit *lu = sdev->hostdata; |
cfb01381 SR |
1323 | |
1324 | sdev->allow_restart = 1; | |
1325 | ||
465ff318 JB |
1326 | /* |
1327 | * Update the dma alignment (minimum alignment requirements for | |
1328 | * start and end of DMA transfers) to be a sector | |
1329 | */ | |
1330 | blk_queue_update_dma_alignment(sdev->request_queue, 511); | |
1331 | ||
5a3c2be6 | 1332 | if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
cfb01381 | 1333 | sdev->inquiry_len = 36; |
5a3c2be6 | 1334 | |
cfb01381 SR |
1335 | return 0; |
1336 | } | |
1337 | ||
9ba136d0 KH |
1338 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1339 | { | |
5a3c2be6 | 1340 | struct sbp2_logical_unit *lu = sdev->hostdata; |
9ba136d0 | 1341 | |
cfb01381 SR |
1342 | sdev->use_10_for_rw = 1; |
1343 | ||
1344 | if (sdev->type == TYPE_ROM) | |
1345 | sdev->use_10_for_ms = 1; | |
5a3c2be6 | 1346 | |
9ba136d0 | 1347 | if (sdev->type == TYPE_DISK && |
5a3c2be6 | 1348 | lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
9ba136d0 | 1349 | sdev->skip_ms_page_8 = 1; |
5a3c2be6 SR |
1350 | |
1351 | if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) | |
9ba136d0 | 1352 | sdev->fix_capacity = 1; |
5a3c2be6 SR |
1353 | |
1354 | if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) | |
cf47c7a2 | 1355 | blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); |
5a3c2be6 | 1356 | |
9ba136d0 KH |
1357 | return 0; |
1358 | } | |
1359 | ||
1360 | /* | |
1361 | * Called by scsi stack when something has really gone wrong. Usually | |
1362 | * called when a command has timed-out for some reason. | |
1363 | */ | |
1364 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1365 | { | |
5a3c2be6 | 1366 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
9ba136d0 | 1367 | |
48f18c76 | 1368 | fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id); |
5a3c2be6 SR |
1369 | sbp2_agent_reset(lu); |
1370 | sbp2_cancel_orbs(lu); | |
9ba136d0 KH |
1371 | |
1372 | return SUCCESS; | |
1373 | } | |
1374 | ||
14e21986 SR |
1375 | /* |
1376 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: | |
1377 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) | |
1378 | * | |
1379 | * This is the concatenation of target port identifier and logical unit | |
1380 | * identifier as per SAM-2...SAM-4 annex A. | |
1381 | */ | |
1382 | static ssize_t | |
1383 | sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, | |
1384 | char *buf) | |
1385 | { | |
1386 | struct scsi_device *sdev = to_scsi_device(dev); | |
5a3c2be6 | 1387 | struct sbp2_logical_unit *lu; |
14e21986 | 1388 | struct fw_device *device; |
14e21986 SR |
1389 | |
1390 | if (!sdev) | |
1391 | return 0; | |
14e21986 | 1392 | |
5a3c2be6 SR |
1393 | lu = sdev->hostdata; |
1394 | device = fw_device(lu->tgt->unit->device.parent); | |
14e21986 SR |
1395 | |
1396 | return sprintf(buf, "%08x%08x:%06x:%04x\n", | |
1397 | device->config_rom[3], device->config_rom[4], | |
5a3c2be6 | 1398 | lu->tgt->directory_id, lu->lun); |
14e21986 SR |
1399 | } |
1400 | ||
1401 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
1402 | ||
1403 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { | |
1404 | &dev_attr_ieee1394_id, | |
1405 | NULL | |
1406 | }; | |
1407 | ||
9ba136d0 KH |
1408 | static struct scsi_host_template scsi_driver_template = { |
1409 | .module = THIS_MODULE, | |
1410 | .name = "SBP-2 IEEE-1394", | |
b02b6bc4 | 1411 | .proc_name = sbp2_driver_name, |
9ba136d0 | 1412 | .queuecommand = sbp2_scsi_queuecommand, |
cfb01381 | 1413 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1414 | .slave_configure = sbp2_scsi_slave_configure, |
1415 | .eh_abort_handler = sbp2_scsi_abort, | |
1416 | .this_id = -1, | |
1417 | .sg_tablesize = SG_ALL, | |
1418 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1419 | .cmd_per_lun = 1, |
1420 | .can_queue = 1, | |
14e21986 | 1421 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
9ba136d0 KH |
1422 | }; |
1423 | ||
9ba136d0 KH |
1424 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1425 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1426 | MODULE_LICENSE("GPL"); | |
1427 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1428 | ||
1e4c7b0d OH |
1429 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1430 | #ifndef CONFIG_IEEE1394_SBP2_MODULE | |
1431 | MODULE_ALIAS("sbp2"); | |
1432 | #endif | |
1433 | ||
9ba136d0 KH |
1434 | static int __init sbp2_init(void) |
1435 | { | |
df8ec249 SR |
1436 | sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME); |
1437 | if (!sbp2_wq) | |
1438 | return -ENOMEM; | |
1439 | ||
9ba136d0 KH |
1440 | return driver_register(&sbp2_driver.driver); |
1441 | } | |
1442 | ||
1443 | static void __exit sbp2_cleanup(void) | |
1444 | { | |
1445 | driver_unregister(&sbp2_driver.driver); | |
df8ec249 | 1446 | destroy_workqueue(sbp2_wq); |
9ba136d0 KH |
1447 | } |
1448 | ||
1449 | module_init(sbp2_init); | |
1450 | module_exit(sbp2_cleanup); |