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 | ||
7bb6bf7c | 31 | #include <linux/blkdev.h> |
09b12dd4 | 32 | #include <linux/bug.h> |
e8ca9702 | 33 | #include <linux/completion.h> |
7bb6bf7c SR |
34 | #include <linux/delay.h> |
35 | #include <linux/device.h> | |
36 | #include <linux/dma-mapping.h> | |
77c9a5da | 37 | #include <linux/firewire.h> |
e8ca9702 SR |
38 | #include <linux/firewire-constants.h> |
39 | #include <linux/init.h> | |
40 | #include <linux/jiffies.h> | |
9ba136d0 | 41 | #include <linux/kernel.h> |
e8ca9702 SR |
42 | #include <linux/kref.h> |
43 | #include <linux/list.h> | |
7bb6bf7c | 44 | #include <linux/mod_devicetable.h> |
9ba136d0 | 45 | #include <linux/module.h> |
5cd54c94 | 46 | #include <linux/moduleparam.h> |
0b5b2903 | 47 | #include <linux/scatterlist.h> |
e8ca9702 SR |
48 | #include <linux/slab.h> |
49 | #include <linux/spinlock.h> | |
e7cdf237 | 50 | #include <linux/string.h> |
2df222b8 | 51 | #include <linux/stringify.h> |
df8ec249 | 52 | #include <linux/workqueue.h> |
e8ca9702 SR |
53 | |
54 | #include <asm/byteorder.h> | |
9ba136d0 KH |
55 | |
56 | #include <scsi/scsi.h> | |
57 | #include <scsi/scsi_cmnd.h> | |
9ba136d0 KH |
58 | #include <scsi/scsi_device.h> |
59 | #include <scsi/scsi_host.h> | |
60 | ||
5cd54c94 SR |
61 | /* |
62 | * So far only bridges from Oxford Semiconductor are known to support | |
63 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
64 | * are possible on OXFW911 and newer Oxsemi bridges. | |
65 | * | |
66 | * Concurrent logins are useful together with cluster filesystems. | |
67 | */ | |
90ab5ee9 | 68 | static bool sbp2_param_exclusive_login = 1; |
5cd54c94 SR |
69 | module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); |
70 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " | |
71 | "(default = Y, use N for concurrent initiators)"); | |
72 | ||
2df222b8 SR |
73 | /* |
74 | * Flags for firmware oddities | |
75 | * | |
76 | * - 128kB max transfer | |
77 | * Limit transfer size. Necessary for some old bridges. | |
78 | * | |
79 | * - 36 byte inquiry | |
80 | * When scsi_mod probes the device, let the inquiry command look like that | |
81 | * from MS Windows. | |
82 | * | |
83 | * - skip mode page 8 | |
84 | * Suppress sending of mode_sense for mode page 8 if the device pretends to | |
85 | * support the SCSI Primary Block commands instead of Reduced Block Commands. | |
86 | * | |
87 | * - fix capacity | |
88 | * Tell sd_mod to correct the last sector number reported by read_capacity. | |
89 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. | |
90 | * Don't use this with devices which don't have this bug. | |
91 | * | |
9220f194 SR |
92 | * - delay inquiry |
93 | * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry. | |
94 | * | |
ffcaade3 SR |
95 | * - power condition |
96 | * Set the power condition field in the START STOP UNIT commands sent by | |
97 | * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on). | |
98 | * Some disks need this to spin down or to resume properly. | |
99 | * | |
2df222b8 SR |
100 | * - override internal blacklist |
101 | * Instead of adding to the built-in blacklist, use only the workarounds | |
102 | * specified in the module load parameter. | |
103 | * Useful if a blacklist entry interfered with a non-broken device. | |
104 | */ | |
105 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 | |
106 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 | |
107 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 | |
108 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 | |
9220f194 SR |
109 | #define SBP2_WORKAROUND_DELAY_INQUIRY 0x10 |
110 | #define SBP2_INQUIRY_DELAY 12 | |
ffcaade3 | 111 | #define SBP2_WORKAROUND_POWER_CONDITION 0x20 |
2df222b8 SR |
112 | #define SBP2_WORKAROUND_OVERRIDE 0x100 |
113 | ||
114 | static int sbp2_param_workarounds; | |
115 | module_param_named(workarounds, sbp2_param_workarounds, int, 0644); | |
116 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
117 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
118 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
119 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
120 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) | |
9220f194 | 121 | ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY) |
ffcaade3 SR |
122 | ", set power condition in start stop unit = " |
123 | __stringify(SBP2_WORKAROUND_POWER_CONDITION) | |
2df222b8 SR |
124 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
125 | ", or a combination)"); | |
126 | ||
5a3c2be6 SR |
127 | /* |
128 | * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry | |
129 | * and one struct scsi_device per sbp2_logical_unit. | |
130 | */ | |
131 | struct sbp2_logical_unit { | |
132 | struct sbp2_target *tgt; | |
133 | struct list_head link; | |
9ba136d0 KH |
134 | struct fw_address_handler address_handler; |
135 | struct list_head orb_list; | |
5a3c2be6 | 136 | |
9ba136d0 | 137 | u64 command_block_agent_address; |
5a3c2be6 | 138 | u16 lun; |
9ba136d0 KH |
139 | int login_id; |
140 | ||
c781c06d | 141 | /* |
5a3c2be6 SR |
142 | * The generation is updated once we've logged in or reconnected |
143 | * to the logical unit. Thus, I/O to the device will automatically | |
144 | * fail and get retried if it happens in a window where the device | |
145 | * is not ready, e.g. after a bus reset but before we reconnect. | |
c781c06d | 146 | */ |
9ba136d0 | 147 | int generation; |
7f37c426 | 148 | int retries; |
70044d71 | 149 | work_func_t workfn; |
7f37c426 | 150 | struct delayed_work work; |
f8436158 | 151 | bool has_sdev; |
2e2705bd | 152 | bool blocked; |
9ba136d0 KH |
153 | }; |
154 | ||
b2af07b6 SR |
155 | static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay) |
156 | { | |
157 | queue_delayed_work(fw_workqueue, &lu->work, delay); | |
158 | } | |
159 | ||
5a3c2be6 SR |
160 | /* |
161 | * We create one struct sbp2_target per IEEE 1212 Unit Directory | |
162 | * and one struct Scsi_Host per sbp2_target. | |
163 | */ | |
164 | struct sbp2_target { | |
5a3c2be6 | 165 | struct fw_unit *unit; |
05cca738 | 166 | struct list_head lu_list; |
5a3c2be6 SR |
167 | |
168 | u64 management_agent_address; | |
c9755e14 | 169 | u64 guid; |
5a3c2be6 SR |
170 | int directory_id; |
171 | int node_id; | |
172 | int address_high; | |
05cca738 | 173 | unsigned int workarounds; |
384170da | 174 | unsigned int mgt_orb_timeout; |
a08e100a | 175 | unsigned int max_payload; |
2e2705bd | 176 | |
d737d7da | 177 | spinlock_t lock; |
2e2705bd SR |
178 | int dont_block; /* counter for each logical unit */ |
179 | int blocked; /* ditto */ | |
5a3c2be6 SR |
180 | }; |
181 | ||
eba9ebaa | 182 | static struct fw_device *target_parent_device(struct sbp2_target *tgt) |
e5110d01 SR |
183 | { |
184 | return fw_parent_device(tgt->unit); | |
185 | } | |
186 | ||
eba9ebaa SR |
187 | static const struct device *tgt_dev(const struct sbp2_target *tgt) |
188 | { | |
189 | return &tgt->unit->device; | |
190 | } | |
191 | ||
192 | static const struct device *lu_dev(const struct sbp2_logical_unit *lu) | |
193 | { | |
194 | return &lu->tgt->unit->device; | |
195 | } | |
196 | ||
cd1f70fd JF |
197 | /* Impossible login_id, to detect logout attempt before successful login */ |
198 | #define INVALID_LOGIN_ID 0x10000 | |
199 | ||
eaf76e0d | 200 | #define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */ |
9ba136d0 | 201 | #define SBP2_ORB_NULL 0x80000000 |
17cff9ff JW |
202 | #define SBP2_RETRY_LIMIT 0xf /* 15 retries */ |
203 | #define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */ | |
9ba136d0 | 204 | |
af271941 SR |
205 | /* |
206 | * There is no transport protocol limit to the CDB length, but we implement | |
207 | * a fixed length only. 16 bytes is enough for disks larger than 2 TB. | |
208 | */ | |
209 | #define SBP2_MAX_CDB_SIZE 16 | |
210 | ||
09b12dd4 | 211 | /* |
26c72e22 CL |
212 | * The maximum SBP-2 data buffer size is 0xffff. We quadlet-align this |
213 | * for compatibility with earlier versions of this driver. | |
09b12dd4 SR |
214 | */ |
215 | #define SBP2_MAX_SEG_SIZE 0xfffc | |
216 | ||
9ba136d0 | 217 | /* Unit directory keys */ |
384170da | 218 | #define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a |
5a3c2be6 SR |
219 | #define SBP2_CSR_FIRMWARE_REVISION 0x3c |
220 | #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 | |
8ff6a757 | 221 | #define SBP2_CSR_UNIT_UNIQUE_ID 0x8d |
5a3c2be6 | 222 | #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 |
9ba136d0 | 223 | |
9ba136d0 KH |
224 | /* Management orb opcodes */ |
225 | #define SBP2_LOGIN_REQUEST 0x0 | |
226 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
227 | #define SBP2_RECONNECT_REQUEST 0x3 | |
228 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
229 | #define SBP2_LOGOUT_REQUEST 0x7 | |
230 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
231 | #define SBP2_ABORT_TASK_SET 0xc | |
232 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
233 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
234 | ||
235 | /* Offsets for command block agent registers */ | |
236 | #define SBP2_AGENT_STATE 0x00 | |
237 | #define SBP2_AGENT_RESET 0x04 | |
238 | #define SBP2_ORB_POINTER 0x08 | |
239 | #define SBP2_DOORBELL 0x10 | |
240 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
241 | ||
242 | /* Status write response codes */ | |
243 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
244 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
245 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
246 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
247 | ||
a77754a7 KH |
248 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
249 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) | |
250 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) | |
251 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) | |
252 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) | |
253 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) | |
254 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) | |
255 | #define STATUS_GET_DATA(v) ((v).data) | |
9ba136d0 KH |
256 | |
257 | struct sbp2_status { | |
258 | u32 status; | |
259 | u32 orb_low; | |
260 | u8 data[24]; | |
261 | }; | |
262 | ||
263 | struct sbp2_pointer { | |
71ee9f01 SR |
264 | __be32 high; |
265 | __be32 low; | |
9ba136d0 KH |
266 | }; |
267 | ||
268 | struct sbp2_orb { | |
269 | struct fw_transaction t; | |
e57d2011 | 270 | struct kref kref; |
9ba136d0 KH |
271 | dma_addr_t request_bus; |
272 | int rcode; | |
a98e2719 | 273 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
d737d7da | 274 | struct sbp2_logical_unit *lu; |
9ba136d0 KH |
275 | struct list_head link; |
276 | }; | |
277 | ||
a77754a7 KH |
278 | #define MANAGEMENT_ORB_LUN(v) ((v)) |
279 | #define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16) | |
280 | #define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20) | |
5cd54c94 | 281 | #define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0) |
a77754a7 KH |
282 | #define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29) |
283 | #define MANAGEMENT_ORB_NOTIFY ((1) << 31) | |
9ba136d0 | 284 | |
a77754a7 KH |
285 | #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) |
286 | #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) | |
9ba136d0 KH |
287 | |
288 | struct sbp2_management_orb { | |
289 | struct sbp2_orb base; | |
290 | struct { | |
291 | struct sbp2_pointer password; | |
292 | struct sbp2_pointer response; | |
71ee9f01 SR |
293 | __be32 misc; |
294 | __be32 length; | |
9ba136d0 KH |
295 | struct sbp2_pointer status_fifo; |
296 | } request; | |
297 | __be32 response[4]; | |
298 | dma_addr_t response_bus; | |
299 | struct completion done; | |
300 | struct sbp2_status status; | |
301 | }; | |
302 | ||
9ba136d0 | 303 | struct sbp2_login_response { |
71ee9f01 | 304 | __be32 misc; |
9ba136d0 | 305 | struct sbp2_pointer command_block_agent; |
71ee9f01 | 306 | __be32 reconnect_hold; |
9ba136d0 | 307 | }; |
a77754a7 KH |
308 | #define COMMAND_ORB_DATA_SIZE(v) ((v)) |
309 | #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) | |
310 | #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) | |
311 | #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) | |
312 | #define COMMAND_ORB_SPEED(v) ((v) << 24) | |
0d7dcbf2 | 313 | #define COMMAND_ORB_DIRECTION ((1) << 27) |
a77754a7 KH |
314 | #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) |
315 | #define COMMAND_ORB_NOTIFY ((1) << 31) | |
9ba136d0 KH |
316 | |
317 | struct sbp2_command_orb { | |
318 | struct sbp2_orb base; | |
319 | struct { | |
320 | struct sbp2_pointer next; | |
321 | struct sbp2_pointer data_descriptor; | |
71ee9f01 | 322 | __be32 misc; |
af271941 | 323 | u8 command_block[SBP2_MAX_CDB_SIZE]; |
9ba136d0 KH |
324 | } request; |
325 | struct scsi_cmnd *cmd; | |
9ba136d0 | 326 | |
9fb2dd12 | 327 | struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); |
9ba136d0 | 328 | dma_addr_t page_table_bus; |
9ba136d0 KH |
329 | }; |
330 | ||
f746072a SR |
331 | #define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */ |
332 | #define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */ | |
333 | ||
9ba136d0 KH |
334 | /* |
335 | * List of devices with known bugs. | |
336 | * | |
337 | * The firmware_revision field, masked with 0xffff00, is the best | |
338 | * indicator for the type of bridge chip of a device. It yields a few | |
339 | * false positives but this did not break correctly behaving devices | |
f746072a | 340 | * so far. |
9ba136d0 KH |
341 | */ |
342 | static const struct { | |
343 | u32 firmware_revision; | |
344 | u32 model; | |
05cca738 | 345 | unsigned int workarounds; |
9ba136d0 KH |
346 | } sbp2_workarounds_table[] = { |
347 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
348 | .firmware_revision = 0x002800, | |
349 | .model = 0x001010, | |
350 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
ffcaade3 SR |
351 | SBP2_WORKAROUND_MODE_SENSE_8 | |
352 | SBP2_WORKAROUND_POWER_CONDITION, | |
9ba136d0 | 353 | }, |
9220f194 SR |
354 | /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { |
355 | .firmware_revision = 0x002800, | |
356 | .model = 0x000000, | |
3c5f8035 | 357 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
9220f194 | 358 | }, |
9ba136d0 KH |
359 | /* Initio bridges, actually only needed for some older ones */ { |
360 | .firmware_revision = 0x000200, | |
f746072a | 361 | .model = SBP2_ROM_VALUE_WILDCARD, |
9ba136d0 KH |
362 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
363 | }, | |
ffcaade3 SR |
364 | /* PL-3507 bridge with Prolific firmware */ { |
365 | .firmware_revision = 0x012800, | |
f746072a | 366 | .model = SBP2_ROM_VALUE_WILDCARD, |
ffcaade3 SR |
367 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
368 | }, | |
9ba136d0 KH |
369 | /* Symbios bridge */ { |
370 | .firmware_revision = 0xa0b800, | |
f746072a | 371 | .model = SBP2_ROM_VALUE_WILDCARD, |
9ba136d0 KH |
372 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
373 | }, | |
2aa9ff7f SR |
374 | /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ { |
375 | .firmware_revision = 0x002600, | |
f746072a | 376 | .model = SBP2_ROM_VALUE_WILDCARD, |
2aa9ff7f SR |
377 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
378 | }, | |
c781c06d | 379 | /* |
c8c4707c SR |
380 | * iPod 2nd generation: needs 128k max transfer size workaround |
381 | * iPod 3rd generation: needs fix capacity workaround | |
c781c06d | 382 | */ |
c8c4707c SR |
383 | { |
384 | .firmware_revision = 0x0a2700, | |
385 | .model = 0x000000, | |
386 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS | | |
387 | SBP2_WORKAROUND_FIX_CAPACITY, | |
388 | }, | |
389 | /* iPod 4th generation */ { | |
9ba136d0 KH |
390 | .firmware_revision = 0x0a2700, |
391 | .model = 0x000021, | |
392 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
393 | }, | |
031bb27c SR |
394 | /* iPod mini */ { |
395 | .firmware_revision = 0x0a2700, | |
396 | .model = 0x000022, | |
397 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
398 | }, | |
9ba136d0 KH |
399 | /* iPod mini */ { |
400 | .firmware_revision = 0x0a2700, | |
401 | .model = 0x000023, | |
402 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
403 | }, | |
404 | /* iPod Photo */ { | |
405 | .firmware_revision = 0x0a2700, | |
406 | .model = 0x00007e, | |
407 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
408 | } | |
409 | }; | |
410 | ||
53dca511 | 411 | static void free_orb(struct kref *kref) |
e57d2011 KH |
412 | { |
413 | struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); | |
414 | ||
415 | kfree(orb); | |
416 | } | |
417 | ||
53dca511 SR |
418 | static void sbp2_status_write(struct fw_card *card, struct fw_request *request, |
419 | int tcode, int destination, int source, | |
33e553fe | 420 | int generation, unsigned long long offset, |
53dca511 | 421 | void *payload, size_t length, void *callback_data) |
9ba136d0 | 422 | { |
5a3c2be6 | 423 | struct sbp2_logical_unit *lu = callback_data; |
9ba136d0 KH |
424 | struct sbp2_orb *orb; |
425 | struct sbp2_status status; | |
9ba136d0 KH |
426 | unsigned long flags; |
427 | ||
428 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
094614fc | 429 | length < 8 || length > sizeof(status)) { |
9ba136d0 KH |
430 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
431 | return; | |
432 | } | |
433 | ||
094614fc SR |
434 | status.status = be32_to_cpup(payload); |
435 | status.orb_low = be32_to_cpup(payload + 4); | |
436 | memset(status.data, 0, sizeof(status.data)); | |
437 | if (length > 8) | |
438 | memcpy(status.data, payload + 8, length - 8); | |
439 | ||
a77754a7 | 440 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
eba9ebaa SR |
441 | dev_notice(lu_dev(lu), |
442 | "non-ORB related status write, not handled\n"); | |
9ba136d0 KH |
443 | fw_send_response(card, request, RCODE_COMPLETE); |
444 | return; | |
445 | } | |
446 | ||
447 | /* Lookup the orb corresponding to this status write. */ | |
d737d7da | 448 | spin_lock_irqsave(&lu->tgt->lock, flags); |
5a3c2be6 | 449 | list_for_each_entry(orb, &lu->orb_list, link) { |
a77754a7 | 450 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
e57d2011 KH |
451 | STATUS_GET_ORB_LOW(status) == orb->request_bus) { |
452 | orb->rcode = RCODE_COMPLETE; | |
9ba136d0 KH |
453 | list_del(&orb->link); |
454 | break; | |
455 | } | |
456 | } | |
d737d7da | 457 | spin_unlock_irqrestore(&lu->tgt->lock, flags); |
9ba136d0 | 458 | |
baed6b82 | 459 | if (&orb->link != &lu->orb_list) { |
9ba136d0 | 460 | orb->callback(orb, &status); |
6c74340b | 461 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
baed6b82 | 462 | } else { |
eba9ebaa | 463 | dev_err(lu_dev(lu), "status write for unknown ORB\n"); |
baed6b82 | 464 | } |
e57d2011 | 465 | |
9ba136d0 KH |
466 | fw_send_response(card, request, RCODE_COMPLETE); |
467 | } | |
468 | ||
53dca511 SR |
469 | static void complete_transaction(struct fw_card *card, int rcode, |
470 | void *payload, size_t length, void *data) | |
9ba136d0 KH |
471 | { |
472 | struct sbp2_orb *orb = data; | |
473 | unsigned long flags; | |
474 | ||
e57d2011 KH |
475 | /* |
476 | * This is a little tricky. We can get the status write for | |
477 | * the orb before we get this callback. The status write | |
478 | * handler above will assume the orb pointer transaction was | |
479 | * successful and set the rcode to RCODE_COMPLETE for the orb. | |
480 | * So this callback only sets the rcode if it hasn't already | |
481 | * been set and only does the cleanup if the transaction | |
482 | * failed and we didn't already get a status write. | |
483 | */ | |
d737d7da | 484 | spin_lock_irqsave(&orb->lu->tgt->lock, flags); |
e57d2011 KH |
485 | |
486 | if (orb->rcode == -1) | |
487 | orb->rcode = rcode; | |
7a4e1e9c | 488 | if (orb->rcode != RCODE_COMPLETE) { |
9ba136d0 | 489 | list_del(&orb->link); |
d737d7da | 490 | spin_unlock_irqrestore(&orb->lu->tgt->lock, flags); |
6c74340b | 491 | |
9ba136d0 | 492 | orb->callback(orb, NULL); |
6c74340b | 493 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
1b34e974 | 494 | } else { |
d737d7da | 495 | spin_unlock_irqrestore(&orb->lu->tgt->lock, flags); |
9ba136d0 | 496 | } |
e57d2011 | 497 | |
6c74340b | 498 | kref_put(&orb->kref, free_orb); /* transaction callback reference */ |
9ba136d0 KH |
499 | } |
500 | ||
53dca511 SR |
501 | static void sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, |
502 | int node_id, int generation, u64 offset) | |
9ba136d0 | 503 | { |
eba9ebaa | 504 | struct fw_device *device = target_parent_device(lu->tgt); |
81bf52d8 | 505 | struct sbp2_pointer orb_pointer; |
9ba136d0 KH |
506 | unsigned long flags; |
507 | ||
81bf52d8 SR |
508 | orb_pointer.high = 0; |
509 | orb_pointer.low = cpu_to_be32(orb->request_bus); | |
9ba136d0 | 510 | |
d737d7da SR |
511 | orb->lu = lu; |
512 | spin_lock_irqsave(&lu->tgt->lock, flags); | |
5a3c2be6 | 513 | list_add_tail(&orb->link, &lu->orb_list); |
d737d7da | 514 | spin_unlock_irqrestore(&lu->tgt->lock, flags); |
9ba136d0 | 515 | |
6c74340b SR |
516 | kref_get(&orb->kref); /* transaction callback reference */ |
517 | kref_get(&orb->kref); /* orb callback reference */ | |
e57d2011 | 518 | |
9ba136d0 | 519 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
f1397490 | 520 | node_id, generation, device->max_speed, offset, |
81bf52d8 | 521 | &orb_pointer, 8, complete_transaction, orb); |
9ba136d0 KH |
522 | } |
523 | ||
5a3c2be6 | 524 | static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |
9ba136d0 | 525 | { |
eba9ebaa | 526 | struct fw_device *device = target_parent_device(lu->tgt); |
9ba136d0 KH |
527 | struct sbp2_orb *orb, *next; |
528 | struct list_head list; | |
2aaad97b | 529 | int retval = -ENOENT; |
9ba136d0 KH |
530 | |
531 | INIT_LIST_HEAD(&list); | |
d737d7da | 532 | spin_lock_irq(&lu->tgt->lock); |
5a3c2be6 | 533 | list_splice_init(&lu->orb_list, &list); |
d737d7da | 534 | spin_unlock_irq(&lu->tgt->lock); |
9ba136d0 KH |
535 | |
536 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 537 | retval = 0; |
7a4e1e9c SR |
538 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
539 | continue; | |
730c32f5 | 540 | |
9ba136d0 KH |
541 | orb->rcode = RCODE_CANCELLED; |
542 | orb->callback(orb, NULL); | |
6c74340b | 543 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
9ba136d0 | 544 | } |
9ba136d0 | 545 | |
2aaad97b | 546 | return retval; |
1d3d52c5 KH |
547 | } |
548 | ||
53dca511 SR |
549 | static void complete_management_orb(struct sbp2_orb *base_orb, |
550 | struct sbp2_status *status) | |
9ba136d0 KH |
551 | { |
552 | struct sbp2_management_orb *orb = | |
6f061487 | 553 | container_of(base_orb, struct sbp2_management_orb, base); |
9ba136d0 KH |
554 | |
555 | if (status) | |
2d826cc5 | 556 | memcpy(&orb->status, status, sizeof(*status)); |
9ba136d0 KH |
557 | complete(&orb->done); |
558 | } | |
559 | ||
53dca511 SR |
560 | static int sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id, |
561 | int generation, int function, | |
562 | int lun_or_login_id, void *response) | |
9ba136d0 | 563 | { |
eba9ebaa | 564 | struct fw_device *device = target_parent_device(lu->tgt); |
9ba136d0 | 565 | struct sbp2_management_orb *orb; |
a4c379c1 | 566 | unsigned int timeout; |
9ba136d0 KH |
567 | int retval = -ENOMEM; |
568 | ||
be6f48b0 SR |
569 | if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device)) |
570 | return 0; | |
571 | ||
c13ccfcf | 572 | orb = kzalloc(sizeof(*orb), GFP_NOIO); |
9ba136d0 KH |
573 | if (orb == NULL) |
574 | return -ENOMEM; | |
575 | ||
e57d2011 | 576 | kref_init(&orb->base.kref); |
9ba136d0 KH |
577 | orb->response_bus = |
578 | dma_map_single(device->card->device, &orb->response, | |
2d826cc5 | 579 | sizeof(orb->response), DMA_FROM_DEVICE); |
8d8bb39b | 580 | if (dma_mapping_error(device->card->device, orb->response_bus)) |
7aa48481 | 581 | goto fail_mapping_response; |
9ba136d0 | 582 | |
71ee9f01 SR |
583 | orb->request.response.high = 0; |
584 | orb->request.response.low = cpu_to_be32(orb->response_bus); | |
9ba136d0 | 585 | |
71ee9f01 | 586 | orb->request.misc = cpu_to_be32( |
a77754a7 KH |
587 | MANAGEMENT_ORB_NOTIFY | |
588 | MANAGEMENT_ORB_FUNCTION(function) | | |
71ee9f01 SR |
589 | MANAGEMENT_ORB_LUN(lun_or_login_id)); |
590 | orb->request.length = cpu_to_be32( | |
591 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response))); | |
9ba136d0 | 592 | |
71ee9f01 SR |
593 | orb->request.status_fifo.high = |
594 | cpu_to_be32(lu->address_handler.offset >> 32); | |
595 | orb->request.status_fifo.low = | |
596 | cpu_to_be32(lu->address_handler.offset); | |
9ba136d0 | 597 | |
9ba136d0 | 598 | if (function == SBP2_LOGIN_REQUEST) { |
14dc992a | 599 | /* Ask for 2^2 == 4 seconds reconnect grace period */ |
71ee9f01 | 600 | orb->request.misc |= cpu_to_be32( |
14dc992a | 601 | MANAGEMENT_ORB_RECONNECT(2) | |
71ee9f01 | 602 | MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login)); |
384170da | 603 | timeout = lu->tgt->mgt_orb_timeout; |
a4c379c1 JW |
604 | } else { |
605 | timeout = SBP2_ORB_TIMEOUT; | |
9ba136d0 KH |
606 | } |
607 | ||
9ba136d0 KH |
608 | init_completion(&orb->done); |
609 | orb->base.callback = complete_management_orb; | |
2aaad97b | 610 | |
7aa48481 SR |
611 | orb->base.request_bus = |
612 | dma_map_single(device->card->device, &orb->request, | |
613 | sizeof(orb->request), DMA_TO_DEVICE); | |
8d8bb39b | 614 | if (dma_mapping_error(device->card->device, orb->base.request_bus)) |
7aa48481 SR |
615 | goto fail_mapping_request; |
616 | ||
5a3c2be6 SR |
617 | sbp2_send_orb(&orb->base, lu, node_id, generation, |
618 | lu->tgt->management_agent_address); | |
9ba136d0 | 619 | |
a4c379c1 | 620 | wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout)); |
9ba136d0 | 621 | |
9ba136d0 | 622 | retval = -EIO; |
5a3c2be6 | 623 | if (sbp2_cancel_orbs(lu) == 0) { |
eba9ebaa SR |
624 | dev_err(lu_dev(lu), "ORB reply timed out, rcode 0x%02x\n", |
625 | orb->base.rcode); | |
9ba136d0 KH |
626 | goto out; |
627 | } | |
628 | ||
2aaad97b | 629 | if (orb->base.rcode != RCODE_COMPLETE) { |
eba9ebaa SR |
630 | dev_err(lu_dev(lu), "management write failed, rcode 0x%02x\n", |
631 | orb->base.rcode); | |
9ba136d0 KH |
632 | goto out; |
633 | } | |
634 | ||
a77754a7 KH |
635 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
636 | STATUS_GET_SBP_STATUS(orb->status) != 0) { | |
eba9ebaa | 637 | dev_err(lu_dev(lu), "error status: %d:%d\n", |
a77754a7 KH |
638 | STATUS_GET_RESPONSE(orb->status), |
639 | STATUS_GET_SBP_STATUS(orb->status)); | |
9ba136d0 KH |
640 | goto out; |
641 | } | |
642 | ||
643 | retval = 0; | |
644 | out: | |
645 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 646 | sizeof(orb->request), DMA_TO_DEVICE); |
7aa48481 | 647 | fail_mapping_request: |
9ba136d0 | 648 | dma_unmap_single(device->card->device, orb->response_bus, |
2d826cc5 | 649 | sizeof(orb->response), DMA_FROM_DEVICE); |
7aa48481 | 650 | fail_mapping_response: |
9ba136d0 | 651 | if (response) |
71ee9f01 | 652 | memcpy(response, orb->response, sizeof(orb->response)); |
e57d2011 | 653 | kref_put(&orb->base.kref, free_orb); |
9ba136d0 KH |
654 | |
655 | return retval; | |
656 | } | |
657 | ||
e0e60215 SR |
658 | static void sbp2_agent_reset(struct sbp2_logical_unit *lu) |
659 | { | |
eba9ebaa | 660 | struct fw_device *device = target_parent_device(lu->tgt); |
1e119fa9 | 661 | __be32 d = 0; |
9ba136d0 | 662 | |
1e119fa9 JF |
663 | fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, |
664 | lu->tgt->node_id, lu->generation, device->max_speed, | |
665 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
e847cc83 | 666 | &d, 4); |
9ba136d0 KH |
667 | } |
668 | ||
53dca511 SR |
669 | static void complete_agent_reset_write_no_wait(struct fw_card *card, |
670 | int rcode, void *payload, size_t length, void *data) | |
e0e60215 SR |
671 | { |
672 | kfree(data); | |
673 | } | |
674 | ||
675 | static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu) | |
9ba136d0 | 676 | { |
eba9ebaa | 677 | struct fw_device *device = target_parent_device(lu->tgt); |
9ba136d0 | 678 | struct fw_transaction *t; |
1e119fa9 | 679 | static __be32 d; |
9ba136d0 | 680 | |
e0e60215 | 681 | t = kmalloc(sizeof(*t), GFP_ATOMIC); |
9ba136d0 | 682 | if (t == NULL) |
e0e60215 | 683 | return; |
9ba136d0 KH |
684 | |
685 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
5a3c2be6 SR |
686 | lu->tgt->node_id, lu->generation, device->max_speed, |
687 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
e847cc83 | 688 | &d, 4, complete_agent_reset_write_no_wait, t); |
9ba136d0 KH |
689 | } |
690 | ||
d737d7da | 691 | static inline void sbp2_allow_block(struct sbp2_target *tgt) |
2e2705bd | 692 | { |
d737d7da | 693 | spin_lock_irq(&tgt->lock); |
0765cbd3 | 694 | --tgt->dont_block; |
d737d7da | 695 | spin_unlock_irq(&tgt->lock); |
2e2705bd SR |
696 | } |
697 | ||
698 | /* | |
699 | * Blocks lu->tgt if all of the following conditions are met: | |
700 | * - Login, INQUIRY, and high-level SCSI setup of all of the target's | |
701 | * logical units have been finished (indicated by dont_block == 0). | |
702 | * - lu->generation is stale. | |
703 | * | |
d737d7da | 704 | * Note, scsi_block_requests() must be called while holding tgt->lock, |
2e2705bd SR |
705 | * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to |
706 | * unblock the target. | |
707 | */ | |
708 | static void sbp2_conditionally_block(struct sbp2_logical_unit *lu) | |
709 | { | |
710 | struct sbp2_target *tgt = lu->tgt; | |
eba9ebaa | 711 | struct fw_card *card = target_parent_device(tgt)->card; |
2e2705bd SR |
712 | struct Scsi_Host *shost = |
713 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
714 | unsigned long flags; | |
715 | ||
d737d7da | 716 | spin_lock_irqsave(&tgt->lock, flags); |
2e2705bd SR |
717 | if (!tgt->dont_block && !lu->blocked && |
718 | lu->generation != card->generation) { | |
719 | lu->blocked = true; | |
a5fd9ec7 | 720 | if (++tgt->blocked == 1) |
2e2705bd | 721 | scsi_block_requests(shost); |
2e2705bd | 722 | } |
d737d7da | 723 | spin_unlock_irqrestore(&tgt->lock, flags); |
2e2705bd SR |
724 | } |
725 | ||
726 | /* | |
727 | * Unblocks lu->tgt as soon as all its logical units can be unblocked. | |
728 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
d737d7da | 729 | * tgt->lock protected section. On the other hand, running it inside |
2e2705bd SR |
730 | * the section might clash with shost->host_lock. |
731 | */ | |
732 | static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu) | |
733 | { | |
734 | struct sbp2_target *tgt = lu->tgt; | |
eba9ebaa | 735 | struct fw_card *card = target_parent_device(tgt)->card; |
2e2705bd SR |
736 | struct Scsi_Host *shost = |
737 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
2e2705bd SR |
738 | bool unblock = false; |
739 | ||
d737d7da | 740 | spin_lock_irq(&tgt->lock); |
2e2705bd SR |
741 | if (lu->blocked && lu->generation == card->generation) { |
742 | lu->blocked = false; | |
743 | unblock = --tgt->blocked == 0; | |
744 | } | |
d737d7da | 745 | spin_unlock_irq(&tgt->lock); |
2e2705bd | 746 | |
a5fd9ec7 | 747 | if (unblock) |
2e2705bd | 748 | scsi_unblock_requests(shost); |
2e2705bd SR |
749 | } |
750 | ||
751 | /* | |
752 | * Prevents future blocking of tgt and unblocks it. | |
753 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
d737d7da | 754 | * tgt->lock protected section. On the other hand, running it inside |
2e2705bd SR |
755 | * the section might clash with shost->host_lock. |
756 | */ | |
757 | static void sbp2_unblock(struct sbp2_target *tgt) | |
758 | { | |
2e2705bd SR |
759 | struct Scsi_Host *shost = |
760 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
2e2705bd | 761 | |
d737d7da | 762 | spin_lock_irq(&tgt->lock); |
2e2705bd | 763 | ++tgt->dont_block; |
d737d7da | 764 | spin_unlock_irq(&tgt->lock); |
2e2705bd SR |
765 | |
766 | scsi_unblock_requests(shost); | |
767 | } | |
768 | ||
f8436158 SR |
769 | static int sbp2_lun2int(u16 lun) |
770 | { | |
771 | struct scsi_lun eight_bytes_lun; | |
772 | ||
773 | memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); | |
774 | eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff; | |
775 | eight_bytes_lun.scsi_lun[1] = lun & 0xff; | |
776 | ||
777 | return scsilun_to_int(&eight_bytes_lun); | |
778 | } | |
779 | ||
17cff9ff JW |
780 | /* |
781 | * Write retransmit retry values into the BUSY_TIMEOUT register. | |
782 | * - The single-phase retry protocol is supported by all SBP-2 devices, but the | |
783 | * default retry_limit value is 0 (i.e. never retry transmission). We write a | |
784 | * saner value after logging into the device. | |
785 | * - The dual-phase retry protocol is optional to implement, and if not | |
786 | * supported, writes to the dual-phase portion of the register will be | |
787 | * ignored. We try to write the original 1394-1995 default here. | |
788 | * - In the case of devices that are also SBP-3-compliant, all writes are | |
789 | * ignored, as the register is read-only, but contains single-phase retry of | |
790 | * 15, which is what we're trying to set for all SBP-2 device anyway, so this | |
791 | * write attempt is safe and yields more consistent behavior for all devices. | |
792 | * | |
793 | * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec, | |
794 | * and section 6.4 of the SBP-3 spec for further details. | |
795 | */ | |
51f9dbef JW |
796 | static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu) |
797 | { | |
eba9ebaa | 798 | struct fw_device *device = target_parent_device(lu->tgt); |
1e119fa9 | 799 | __be32 d = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT); |
51f9dbef | 800 | |
1e119fa9 JF |
801 | fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, |
802 | lu->tgt->node_id, lu->generation, device->max_speed, | |
e847cc83 | 803 | CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT, &d, 4); |
51f9dbef JW |
804 | } |
805 | ||
5a3c2be6 SR |
806 | static void sbp2_reconnect(struct work_struct *work); |
807 | ||
7f37c426 KH |
808 | static void sbp2_login(struct work_struct *work) |
809 | { | |
5a3c2be6 SR |
810 | struct sbp2_logical_unit *lu = |
811 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 | 812 | struct sbp2_target *tgt = lu->tgt; |
eba9ebaa | 813 | struct fw_device *device = target_parent_device(tgt); |
48f18c76 | 814 | struct Scsi_Host *shost; |
5a3c2be6 | 815 | struct scsi_device *sdev; |
7f37c426 | 816 | struct sbp2_login_response response; |
5a3c2be6 | 817 | int generation, node_id, local_node_id; |
7f37c426 | 818 | |
be6f48b0 | 819 | if (fw_device_is_shutdown(device)) |
6ff8147d | 820 | return; |
be6f48b0 | 821 | |
5a8a1bcd | 822 | generation = device->generation; |
621f6dd7 | 823 | smp_rmb(); /* node IDs must not be older than generation */ |
5a8a1bcd SR |
824 | node_id = device->node_id; |
825 | local_node_id = device->card->node_id; | |
7f37c426 | 826 | |
ce896d95 | 827 | /* If this is a re-login attempt, log out, or we might be rejected. */ |
f8436158 | 828 | if (lu->has_sdev) |
ce896d95 SR |
829 | sbp2_send_management_orb(lu, device->node_id, generation, |
830 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
831 | ||
5a3c2be6 SR |
832 | if (sbp2_send_management_orb(lu, node_id, generation, |
833 | SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { | |
2e2705bd | 834 | if (lu->retries++ < 5) { |
285838eb | 835 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
2e2705bd | 836 | } else { |
eba9ebaa SR |
837 | dev_err(tgt_dev(tgt), "failed to login to LUN %04x\n", |
838 | lu->lun); | |
2e2705bd SR |
839 | /* Let any waiting I/O fail from now on. */ |
840 | sbp2_unblock(lu->tgt); | |
841 | } | |
6ff8147d | 842 | return; |
7f37c426 KH |
843 | } |
844 | ||
48f18c76 SR |
845 | tgt->node_id = node_id; |
846 | tgt->address_high = local_node_id << 16; | |
621f6dd7 SR |
847 | smp_wmb(); /* node IDs must not be older than generation */ |
848 | lu->generation = generation; | |
7f37c426 | 849 | |
5a3c2be6 | 850 | lu->command_block_agent_address = |
71ee9f01 SR |
851 | ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff) |
852 | << 32) | be32_to_cpu(response.command_block_agent.low); | |
853 | lu->login_id = be32_to_cpu(response.misc) & 0xffff; | |
7f37c426 | 854 | |
eba9ebaa SR |
855 | dev_notice(tgt_dev(tgt), "logged in to LUN %04x (%d retries)\n", |
856 | lu->lun, lu->retries); | |
7f37c426 | 857 | |
51f9dbef JW |
858 | /* set appropriate retry limit(s) in BUSY_TIMEOUT register */ |
859 | sbp2_set_busy_timeout(lu); | |
7f37c426 | 860 | |
70044d71 | 861 | lu->workfn = sbp2_reconnect; |
5a3c2be6 SR |
862 | sbp2_agent_reset(lu); |
863 | ||
0fa6dfdb | 864 | /* This was a re-login. */ |
f8436158 | 865 | if (lu->has_sdev) { |
0fa6dfdb | 866 | sbp2_cancel_orbs(lu); |
2e2705bd | 867 | sbp2_conditionally_unblock(lu); |
6ff8147d SR |
868 | |
869 | return; | |
0fa6dfdb SR |
870 | } |
871 | ||
9220f194 SR |
872 | if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) |
873 | ssleep(SBP2_INQUIRY_DELAY); | |
874 | ||
48f18c76 | 875 | shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
f8436158 | 876 | sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu); |
e80de370 SR |
877 | /* |
878 | * FIXME: We are unable to perform reconnects while in sbp2_login(). | |
879 | * Therefore __scsi_add_device() will get into trouble if a bus reset | |
880 | * happens in parallel. It will either fail or leave us with an | |
881 | * unusable sdev. As a workaround we check for this and retry the | |
882 | * whole login and SCSI probing. | |
883 | */ | |
1b9c12ba | 884 | |
e80de370 SR |
885 | /* Reported error during __scsi_add_device() */ |
886 | if (IS_ERR(sdev)) | |
887 | goto out_logout_login; | |
888 | ||
e80de370 SR |
889 | /* Unreported error during __scsi_add_device() */ |
890 | smp_rmb(); /* get current card generation */ | |
891 | if (generation != device->card->generation) { | |
892 | scsi_remove_device(sdev); | |
33f1c6c3 | 893 | scsi_device_put(sdev); |
e80de370 | 894 | goto out_logout_login; |
7f37c426 | 895 | } |
e80de370 SR |
896 | |
897 | /* No error during __scsi_add_device() */ | |
f8436158 SR |
898 | lu->has_sdev = true; |
899 | scsi_device_put(sdev); | |
d737d7da | 900 | sbp2_allow_block(tgt); |
6ff8147d SR |
901 | |
902 | return; | |
e80de370 SR |
903 | |
904 | out_logout_login: | |
905 | smp_rmb(); /* generation may have changed */ | |
906 | generation = device->generation; | |
907 | smp_rmb(); /* node_id must not be older than generation */ | |
908 | ||
909 | sbp2_send_management_orb(lu, device->node_id, generation, | |
910 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
911 | /* | |
912 | * If a bus reset happened, sbp2_update will have requeued | |
913 | * lu->work already. Reset the work from reconnect to login. | |
914 | */ | |
70044d71 | 915 | lu->workfn = sbp2_login; |
7f37c426 | 916 | } |
9ba136d0 | 917 | |
b2af07b6 SR |
918 | static void sbp2_reconnect(struct work_struct *work) |
919 | { | |
920 | struct sbp2_logical_unit *lu = | |
921 | container_of(work, struct sbp2_logical_unit, work.work); | |
922 | struct sbp2_target *tgt = lu->tgt; | |
eba9ebaa | 923 | struct fw_device *device = target_parent_device(tgt); |
b2af07b6 SR |
924 | int generation, node_id, local_node_id; |
925 | ||
926 | if (fw_device_is_shutdown(device)) | |
927 | return; | |
928 | ||
929 | generation = device->generation; | |
930 | smp_rmb(); /* node IDs must not be older than generation */ | |
931 | node_id = device->node_id; | |
932 | local_node_id = device->card->node_id; | |
933 | ||
934 | if (sbp2_send_management_orb(lu, node_id, generation, | |
935 | SBP2_RECONNECT_REQUEST, | |
936 | lu->login_id, NULL) < 0) { | |
937 | /* | |
938 | * If reconnect was impossible even though we are in the | |
939 | * current generation, fall back and try to log in again. | |
940 | * | |
941 | * We could check for "Function rejected" status, but | |
942 | * looking at the bus generation as simpler and more general. | |
943 | */ | |
944 | smp_rmb(); /* get current card generation */ | |
945 | if (generation == device->card->generation || | |
946 | lu->retries++ >= 5) { | |
eba9ebaa | 947 | dev_err(tgt_dev(tgt), "failed to reconnect\n"); |
b2af07b6 | 948 | lu->retries = 0; |
70044d71 | 949 | lu->workfn = sbp2_login; |
b2af07b6 SR |
950 | } |
951 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); | |
952 | ||
953 | return; | |
954 | } | |
955 | ||
956 | tgt->node_id = node_id; | |
957 | tgt->address_high = local_node_id << 16; | |
958 | smp_wmb(); /* node IDs must not be older than generation */ | |
959 | lu->generation = generation; | |
960 | ||
eba9ebaa SR |
961 | dev_notice(tgt_dev(tgt), "reconnected to LUN %04x (%d retries)\n", |
962 | lu->lun, lu->retries); | |
b2af07b6 SR |
963 | |
964 | sbp2_agent_reset(lu); | |
965 | sbp2_cancel_orbs(lu); | |
966 | sbp2_conditionally_unblock(lu); | |
967 | } | |
968 | ||
70044d71 TH |
969 | static void sbp2_lu_workfn(struct work_struct *work) |
970 | { | |
971 | struct sbp2_logical_unit *lu = container_of(to_delayed_work(work), | |
972 | struct sbp2_logical_unit, work); | |
973 | lu->workfn(work); | |
974 | } | |
975 | ||
5a3c2be6 | 976 | static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) |
9ba136d0 | 977 | { |
5a3c2be6 | 978 | struct sbp2_logical_unit *lu; |
9ba136d0 | 979 | |
5a3c2be6 SR |
980 | lu = kmalloc(sizeof(*lu), GFP_KERNEL); |
981 | if (!lu) | |
982 | return -ENOMEM; | |
9ba136d0 | 983 | |
5a3c2be6 SR |
984 | lu->address_handler.length = 0x100; |
985 | lu->address_handler.address_callback = sbp2_status_write; | |
986 | lu->address_handler.callback_data = lu; | |
9ba136d0 | 987 | |
5a3c2be6 SR |
988 | if (fw_core_add_address_handler(&lu->address_handler, |
989 | &fw_high_memory_region) < 0) { | |
990 | kfree(lu); | |
991 | return -ENOMEM; | |
992 | } | |
9ba136d0 | 993 | |
f8436158 SR |
994 | lu->tgt = tgt; |
995 | lu->lun = lun_entry & 0xffff; | |
cd1f70fd | 996 | lu->login_id = INVALID_LOGIN_ID; |
f8436158 SR |
997 | lu->retries = 0; |
998 | lu->has_sdev = false; | |
999 | lu->blocked = false; | |
2e2705bd | 1000 | ++tgt->dont_block; |
5a3c2be6 | 1001 | INIT_LIST_HEAD(&lu->orb_list); |
70044d71 TH |
1002 | lu->workfn = sbp2_login; |
1003 | INIT_DELAYED_WORK(&lu->work, sbp2_lu_workfn); | |
9ba136d0 | 1004 | |
5a3c2be6 SR |
1005 | list_add_tail(&lu->link, &tgt->lu_list); |
1006 | return 0; | |
1007 | } | |
ad85274f | 1008 | |
8ff6a757 CB |
1009 | static void sbp2_get_unit_unique_id(struct sbp2_target *tgt, |
1010 | const u32 *leaf) | |
1011 | { | |
1012 | if ((leaf[0] & 0xffff0000) == 0x00020000) | |
1013 | tgt->guid = (u64)leaf[1] << 32 | leaf[2]; | |
1014 | } | |
1015 | ||
13b302d0 SR |
1016 | static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, |
1017 | const u32 *directory) | |
5a3c2be6 SR |
1018 | { |
1019 | struct fw_csr_iterator ci; | |
1020 | int key, value; | |
9ba136d0 | 1021 | |
5a3c2be6 SR |
1022 | fw_csr_iterator_init(&ci, directory); |
1023 | while (fw_csr_iterator_next(&ci, &key, &value)) | |
1024 | if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && | |
1025 | sbp2_add_logical_unit(tgt, value) < 0) | |
1026 | return -ENOMEM; | |
1027 | return 0; | |
1028 | } | |
1029 | ||
13b302d0 | 1030 | static int sbp2_scan_unit_dir(struct sbp2_target *tgt, const u32 *directory, |
5a3c2be6 SR |
1031 | u32 *model, u32 *firmware_revision) |
1032 | { | |
1033 | struct fw_csr_iterator ci; | |
1034 | int key, value; | |
1035 | ||
1036 | fw_csr_iterator_init(&ci, directory); | |
9ba136d0 KH |
1037 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
1038 | switch (key) { | |
5a3c2be6 | 1039 | |
9ba136d0 | 1040 | case CSR_DEPENDENT_INFO | CSR_OFFSET: |
5a3c2be6 SR |
1041 | tgt->management_agent_address = |
1042 | CSR_REGISTER_BASE + 4 * value; | |
9ba136d0 | 1043 | break; |
5a3c2be6 SR |
1044 | |
1045 | case CSR_DIRECTORY_ID: | |
1046 | tgt->directory_id = value; | |
9ba136d0 | 1047 | break; |
5a3c2be6 | 1048 | |
9ba136d0 | 1049 | case CSR_MODEL: |
5a3c2be6 SR |
1050 | *model = value; |
1051 | break; | |
1052 | ||
1053 | case SBP2_CSR_FIRMWARE_REVISION: | |
1054 | *firmware_revision = value; | |
1055 | break; | |
1056 | ||
384170da JW |
1057 | case SBP2_CSR_UNIT_CHARACTERISTICS: |
1058 | /* the timeout value is stored in 500ms units */ | |
eaf76e0d | 1059 | tgt->mgt_orb_timeout = (value >> 8 & 0xff) * 500; |
384170da JW |
1060 | break; |
1061 | ||
5a3c2be6 SR |
1062 | case SBP2_CSR_LOGICAL_UNIT_NUMBER: |
1063 | if (sbp2_add_logical_unit(tgt, value) < 0) | |
1064 | return -ENOMEM; | |
1065 | break; | |
1066 | ||
8ff6a757 CB |
1067 | case SBP2_CSR_UNIT_UNIQUE_ID: |
1068 | sbp2_get_unit_unique_id(tgt, ci.p - 1 + value); | |
1069 | break; | |
1070 | ||
5a3c2be6 | 1071 | case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: |
0e3e2eab RS |
1072 | /* Adjust for the increment in the iterator */ |
1073 | if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0) | |
5a3c2be6 | 1074 | return -ENOMEM; |
9ba136d0 KH |
1075 | break; |
1076 | } | |
1077 | } | |
5a3c2be6 SR |
1078 | return 0; |
1079 | } | |
1080 | ||
eaf76e0d SR |
1081 | /* |
1082 | * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be | |
1083 | * provided in the config rom. Most devices do provide a value, which | |
1084 | * we'll use for login management orbs, but with some sane limits. | |
1085 | */ | |
1086 | static void sbp2_clamp_management_orb_timeout(struct sbp2_target *tgt) | |
1087 | { | |
1088 | unsigned int timeout = tgt->mgt_orb_timeout; | |
1089 | ||
1090 | if (timeout > 40000) | |
eba9ebaa SR |
1091 | dev_notice(tgt_dev(tgt), "%ds mgt_ORB_timeout limited to 40s\n", |
1092 | timeout / 1000); | |
eaf76e0d SR |
1093 | |
1094 | tgt->mgt_orb_timeout = clamp_val(timeout, 5000, 40000); | |
1095 | } | |
1096 | ||
5a3c2be6 SR |
1097 | static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, |
1098 | u32 firmware_revision) | |
1099 | { | |
1100 | int i; | |
05cca738 | 1101 | unsigned int w = sbp2_param_workarounds; |
2df222b8 SR |
1102 | |
1103 | if (w) | |
eba9ebaa SR |
1104 | dev_notice(tgt_dev(tgt), |
1105 | "Please notify linux1394-devel@lists.sf.net " | |
1106 | "if you need the workarounds parameter\n"); | |
5a3c2be6 | 1107 | |
2df222b8 SR |
1108 | if (w & SBP2_WORKAROUND_OVERRIDE) |
1109 | goto out; | |
9ba136d0 KH |
1110 | |
1111 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
5a3c2be6 | 1112 | |
9ba136d0 KH |
1113 | if (sbp2_workarounds_table[i].firmware_revision != |
1114 | (firmware_revision & 0xffffff00)) | |
1115 | continue; | |
5a3c2be6 | 1116 | |
9ba136d0 | 1117 | if (sbp2_workarounds_table[i].model != model && |
f746072a | 1118 | sbp2_workarounds_table[i].model != SBP2_ROM_VALUE_WILDCARD) |
9ba136d0 | 1119 | continue; |
5a3c2be6 | 1120 | |
2df222b8 | 1121 | w |= sbp2_workarounds_table[i].workarounds; |
9ba136d0 KH |
1122 | break; |
1123 | } | |
2df222b8 SR |
1124 | out: |
1125 | if (w) | |
eba9ebaa SR |
1126 | dev_notice(tgt_dev(tgt), "workarounds 0x%x " |
1127 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", | |
1128 | w, firmware_revision, model); | |
2df222b8 | 1129 | tgt->workarounds = w; |
5a3c2be6 SR |
1130 | } |
1131 | ||
1132 | static struct scsi_host_template scsi_driver_template; | |
94a87157 | 1133 | static void sbp2_remove(struct fw_unit *unit); |
5a3c2be6 | 1134 | |
94a87157 | 1135 | static int sbp2_probe(struct fw_unit *unit, const struct ieee1394_device_id *id) |
5a3c2be6 | 1136 | { |
e5110d01 | 1137 | struct fw_device *device = fw_parent_device(unit); |
5a3c2be6 SR |
1138 | struct sbp2_target *tgt; |
1139 | struct sbp2_logical_unit *lu; | |
1140 | struct Scsi_Host *shost; | |
1141 | u32 model, firmware_revision; | |
1142 | ||
74044563 CB |
1143 | /* cannot (or should not) handle targets on the local node */ |
1144 | if (device->is_local) | |
1145 | return -ENODEV; | |
1146 | ||
09b12dd4 | 1147 | if (dma_get_max_seg_size(device->card->device) > SBP2_MAX_SEG_SIZE) |
d6c8cefc SR |
1148 | WARN_ON(dma_set_max_seg_size(device->card->device, |
1149 | SBP2_MAX_SEG_SIZE)); | |
09b12dd4 | 1150 | |
5a3c2be6 SR |
1151 | shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); |
1152 | if (shost == NULL) | |
1153 | return -ENOMEM; | |
1154 | ||
1155 | tgt = (struct sbp2_target *)shost->hostdata; | |
d961450d | 1156 | dev_set_drvdata(&unit->device, tgt); |
5a3c2be6 | 1157 | tgt->unit = unit; |
5a3c2be6 | 1158 | INIT_LIST_HEAD(&tgt->lu_list); |
d737d7da | 1159 | spin_lock_init(&tgt->lock); |
c9755e14 | 1160 | tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; |
5a3c2be6 SR |
1161 | |
1162 | if (fw_device_enable_phys_dma(device) < 0) | |
1163 | goto fail_shost_put; | |
1164 | ||
af271941 SR |
1165 | shost->max_cmd_len = SBP2_MAX_CDB_SIZE; |
1166 | ||
473ffe65 CL |
1167 | if (scsi_add_host_with_dma(shost, &unit->device, |
1168 | device->card->device) < 0) | |
5a3c2be6 SR |
1169 | goto fail_shost_put; |
1170 | ||
5a3c2be6 SR |
1171 | /* implicit directory ID */ |
1172 | tgt->directory_id = ((unit->directory - device->config_rom) * 4 | |
1173 | + CSR_CONFIG_ROM) & 0xffffff; | |
1174 | ||
f746072a SR |
1175 | firmware_revision = SBP2_ROM_VALUE_MISSING; |
1176 | model = SBP2_ROM_VALUE_MISSING; | |
1177 | ||
5a3c2be6 SR |
1178 | if (sbp2_scan_unit_dir(tgt, unit->directory, &model, |
1179 | &firmware_revision) < 0) | |
32ce38f4 | 1180 | goto fail_remove; |
5a3c2be6 | 1181 | |
eaf76e0d | 1182 | sbp2_clamp_management_orb_timeout(tgt); |
5a3c2be6 | 1183 | sbp2_init_workarounds(tgt, model, firmware_revision); |
9ba136d0 | 1184 | |
a08e100a SR |
1185 | /* |
1186 | * At S100 we can do 512 bytes per packet, at S200 1024 bytes, | |
1187 | * and so on up to 4096 bytes. The SBP-2 max_payload field | |
1188 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
1189 | * if we set this to max_speed + 7, we get the right value. | |
1190 | */ | |
4ec4a67a SR |
1191 | tgt->max_payload = min3(device->max_speed + 7, 10U, |
1192 | device->card->max_receive - 1); | |
a08e100a | 1193 | |
285838eb | 1194 | /* Do the login in a workqueue so we can easily reschedule retries. */ |
5a3c2be6 | 1195 | list_for_each_entry(lu, &tgt->lu_list, link) |
0dcfeb7e | 1196 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
6ff8147d | 1197 | |
9ba136d0 | 1198 | return 0; |
ad85274f | 1199 | |
32ce38f4 | 1200 | fail_remove: |
94a87157 | 1201 | sbp2_remove(unit); |
5a3c2be6 SR |
1202 | return -ENOMEM; |
1203 | ||
1204 | fail_shost_put: | |
1205 | scsi_host_put(shost); | |
1206 | return -ENOMEM; | |
9ba136d0 KH |
1207 | } |
1208 | ||
b2af07b6 | 1209 | static void sbp2_update(struct fw_unit *unit) |
9ba136d0 | 1210 | { |
d961450d | 1211 | struct sbp2_target *tgt = dev_get_drvdata(&unit->device); |
0278ccd9 CB |
1212 | struct sbp2_logical_unit *lu; |
1213 | ||
b2af07b6 | 1214 | fw_device_enable_phys_dma(fw_parent_device(unit)); |
6ff8147d | 1215 | |
b2af07b6 SR |
1216 | /* |
1217 | * Fw-core serializes sbp2_update() against sbp2_remove(). | |
1218 | * Iteration over tgt->lu_list is therefore safe here. | |
1219 | */ | |
1220 | list_for_each_entry(lu, &tgt->lu_list, link) { | |
1221 | sbp2_conditionally_block(lu); | |
1222 | lu->retries = 0; | |
1223 | sbp2_queue_work(lu, 0); | |
1224 | } | |
9ba136d0 KH |
1225 | } |
1226 | ||
94a87157 | 1227 | static void sbp2_remove(struct fw_unit *unit) |
9ba136d0 | 1228 | { |
32ce38f4 SR |
1229 | struct fw_device *device = fw_parent_device(unit); |
1230 | struct sbp2_target *tgt = dev_get_drvdata(&unit->device); | |
b2af07b6 SR |
1231 | struct sbp2_logical_unit *lu, *next; |
1232 | struct Scsi_Host *shost = | |
1233 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
1234 | struct scsi_device *sdev; | |
be6f48b0 | 1235 | |
b2af07b6 SR |
1236 | /* prevent deadlocks */ |
1237 | sbp2_unblock(tgt); | |
9ba136d0 | 1238 | |
b2af07b6 | 1239 | list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { |
32ce38f4 | 1240 | cancel_delayed_work_sync(&lu->work); |
b2af07b6 SR |
1241 | sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun)); |
1242 | if (sdev) { | |
1243 | scsi_remove_device(sdev); | |
1244 | scsi_device_put(sdev); | |
7f37c426 | 1245 | } |
b2af07b6 SR |
1246 | if (lu->login_id != INVALID_LOGIN_ID) { |
1247 | int generation, node_id; | |
1248 | /* | |
1249 | * tgt->node_id may be obsolete here if we failed | |
1250 | * during initial login or after a bus reset where | |
1251 | * the topology changed. | |
1252 | */ | |
1253 | generation = device->generation; | |
1254 | smp_rmb(); /* node_id vs. generation */ | |
1255 | node_id = device->node_id; | |
1256 | sbp2_send_management_orb(lu, node_id, generation, | |
1257 | SBP2_LOGOUT_REQUEST, | |
1258 | lu->login_id, NULL); | |
1259 | } | |
1260 | fw_core_remove_address_handler(&lu->address_handler); | |
1261 | list_del(&lu->link); | |
1262 | kfree(lu); | |
7f37c426 | 1263 | } |
b2af07b6 | 1264 | scsi_remove_host(shost); |
94a87157 | 1265 | dev_notice(&unit->device, "released target %d:0:0\n", shost->host_no); |
9ba136d0 | 1266 | |
b2af07b6 | 1267 | scsi_host_put(shost); |
9ba136d0 KH |
1268 | } |
1269 | ||
1270 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
1271 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
1272 | ||
b3b29888 | 1273 | static const struct ieee1394_device_id sbp2_id_table[] = { |
9ba136d0 | 1274 | { |
b3b29888 SR |
1275 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | |
1276 | IEEE1394_MATCH_VERSION, | |
9ba136d0 | 1277 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, |
5af4e5ea | 1278 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
1279 | }, |
1280 | { } | |
1281 | }; | |
1282 | ||
1283 | static struct fw_driver sbp2_driver = { | |
1284 | .driver = { | |
1285 | .owner = THIS_MODULE, | |
0c22ecde | 1286 | .name = KBUILD_MODNAME, |
9ba136d0 | 1287 | .bus = &fw_bus_type, |
9ba136d0 | 1288 | }, |
94a87157 | 1289 | .probe = sbp2_probe, |
9ba136d0 | 1290 | .update = sbp2_update, |
94a87157 | 1291 | .remove = sbp2_remove, |
9ba136d0 KH |
1292 | .id_table = sbp2_id_table, |
1293 | }; | |
1294 | ||
5e212567 SR |
1295 | static void sbp2_unmap_scatterlist(struct device *card_device, |
1296 | struct sbp2_command_orb *orb) | |
1297 | { | |
f2030223 | 1298 | scsi_dma_unmap(orb->cmd); |
5e212567 SR |
1299 | |
1300 | if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT)) | |
1301 | dma_unmap_single(card_device, orb->page_table_bus, | |
1302 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
1303 | } | |
1304 | ||
53dca511 | 1305 | static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) |
9ba136d0 | 1306 | { |
fbb5423c | 1307 | int sam_status; |
6503de65 | 1308 | int sfmt = (sbp2_status[0] >> 6) & 0x03; |
fbb5423c | 1309 | |
6503de65 CB |
1310 | if (sfmt == 2 || sfmt == 3) { |
1311 | /* | |
1312 | * Reserved for future standardization (2) or | |
1313 | * Status block format vendor-dependent (3) | |
1314 | */ | |
1315 | return DID_ERROR << 16; | |
1316 | } | |
fbb5423c | 1317 | |
6503de65 | 1318 | sense_data[0] = 0x70 | sfmt | (sbp2_status[1] & 0x80); |
9ba136d0 | 1319 | sense_data[1] = 0x0; |
6503de65 | 1320 | sense_data[2] = ((sbp2_status[1] << 1) & 0xe0) | (sbp2_status[1] & 0x0f); |
9ba136d0 KH |
1321 | sense_data[3] = sbp2_status[4]; |
1322 | sense_data[4] = sbp2_status[5]; | |
1323 | sense_data[5] = sbp2_status[6]; | |
1324 | sense_data[6] = sbp2_status[7]; | |
1325 | sense_data[7] = 10; | |
1326 | sense_data[8] = sbp2_status[8]; | |
1327 | sense_data[9] = sbp2_status[9]; | |
1328 | sense_data[10] = sbp2_status[10]; | |
1329 | sense_data[11] = sbp2_status[11]; | |
1330 | sense_data[12] = sbp2_status[2]; | |
1331 | sense_data[13] = sbp2_status[3]; | |
1332 | sense_data[14] = sbp2_status[12]; | |
1333 | sense_data[15] = sbp2_status[13]; | |
1334 | ||
fbb5423c | 1335 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 1336 | |
fbb5423c KH |
1337 | switch (sam_status) { |
1338 | case SAM_STAT_GOOD: | |
9ba136d0 | 1339 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 1340 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 1341 | case SAM_STAT_BUSY: |
9ba136d0 KH |
1342 | case SAM_STAT_RESERVATION_CONFLICT: |
1343 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
1344 | return DID_OK << 16 | sam_status; |
1345 | ||
9ba136d0 | 1346 | default: |
fbb5423c | 1347 | return DID_ERROR << 16; |
9ba136d0 KH |
1348 | } |
1349 | } | |
1350 | ||
53dca511 SR |
1351 | static void complete_command_orb(struct sbp2_orb *base_orb, |
1352 | struct sbp2_status *status) | |
9ba136d0 | 1353 | { |
6f061487 JF |
1354 | struct sbp2_command_orb *orb = |
1355 | container_of(base_orb, struct sbp2_command_orb, base); | |
d737d7da | 1356 | struct fw_device *device = target_parent_device(base_orb->lu->tgt); |
9ba136d0 KH |
1357 | int result; |
1358 | ||
1359 | if (status != NULL) { | |
a77754a7 | 1360 | if (STATUS_GET_DEAD(*status)) |
d737d7da | 1361 | sbp2_agent_reset_no_wait(base_orb->lu); |
9ba136d0 | 1362 | |
a77754a7 | 1363 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 1364 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 1365 | result = DID_OK << 16; |
9ba136d0 KH |
1366 | break; |
1367 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 1368 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
1369 | break; |
1370 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
1371 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
1372 | default: | |
fbb5423c | 1373 | result = DID_ERROR << 16; |
9ba136d0 KH |
1374 | break; |
1375 | } | |
1376 | ||
a77754a7 KH |
1377 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
1378 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
1379 | orb->cmd->sense_buffer); |
1380 | } else { | |
c781c06d KH |
1381 | /* |
1382 | * If the orb completes with status == NULL, something | |
9ba136d0 | 1383 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
1384 | * or when sending the write (less likely). |
1385 | */ | |
fbb5423c | 1386 | result = DID_BUS_BUSY << 16; |
d737d7da | 1387 | sbp2_conditionally_block(base_orb->lu); |
9ba136d0 KH |
1388 | } |
1389 | ||
1390 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 1391 | sizeof(orb->request), DMA_TO_DEVICE); |
5e212567 | 1392 | sbp2_unmap_scatterlist(device->card->device, orb); |
9ba136d0 | 1393 | |
fbb5423c | 1394 | orb->cmd->result = result; |
b75ca5ea | 1395 | orb->cmd->scsi_done(orb->cmd); |
9ba136d0 KH |
1396 | } |
1397 | ||
53dca511 SR |
1398 | static int sbp2_map_scatterlist(struct sbp2_command_orb *orb, |
1399 | struct fw_device *device, struct sbp2_logical_unit *lu) | |
9ba136d0 | 1400 | { |
09b12dd4 SR |
1401 | struct scatterlist *sg = scsi_sglist(orb->cmd); |
1402 | int i, n; | |
1403 | ||
f2030223 CL |
1404 | n = scsi_dma_map(orb->cmd); |
1405 | if (n <= 0) | |
95ffc5e3 | 1406 | goto fail; |
9ba136d0 | 1407 | |
c781c06d KH |
1408 | /* |
1409 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
1410 | * the scatter list by converting it to an immediate block |
1411 | * request. This is also a workaround for broken devices such | |
1412 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
1413 | * tables. |
1414 | */ | |
09b12dd4 | 1415 | if (n == 1) { |
71ee9f01 SR |
1416 | orb->request.data_descriptor.high = |
1417 | cpu_to_be32(lu->tgt->address_high); | |
1418 | orb->request.data_descriptor.low = | |
1419 | cpu_to_be32(sg_dma_address(sg)); | |
1420 | orb->request.misc |= | |
1421 | cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg))); | |
95ffc5e3 | 1422 | return 0; |
9ba136d0 KH |
1423 | } |
1424 | ||
09b12dd4 SR |
1425 | for_each_sg(sg, sg, n, i) { |
1426 | orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16); | |
1427 | orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg)); | |
9ba136d0 KH |
1428 | } |
1429 | ||
b4be016a SR |
1430 | orb->page_table_bus = |
1431 | dma_map_single(device->card->device, orb->page_table, | |
1432 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
8d8bb39b | 1433 | if (dma_mapping_error(device->card->device, orb->page_table_bus)) |
b4be016a | 1434 | goto fail_page_table; |
9ba136d0 | 1435 | |
c781c06d KH |
1436 | /* |
1437 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
1438 | * to fill in the node ID part of the address. All other |
1439 | * pointers assume that the data referenced reside on the | |
1440 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
1441 | * on other nodes so we need to put our ID in descriptor.high. |
1442 | */ | |
71ee9f01 SR |
1443 | orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high); |
1444 | orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus); | |
1445 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT | | |
09b12dd4 | 1446 | COMMAND_ORB_DATA_SIZE(n)); |
9ba136d0 | 1447 | |
95ffc5e3 KH |
1448 | return 0; |
1449 | ||
1450 | fail_page_table: | |
f2030223 | 1451 | scsi_dma_unmap(orb->cmd); |
95ffc5e3 KH |
1452 | fail: |
1453 | return -ENOMEM; | |
9ba136d0 KH |
1454 | } |
1455 | ||
9ba136d0 KH |
1456 | /* SCSI stack integration */ |
1457 | ||
b75ca5ea SR |
1458 | static int sbp2_scsi_queuecommand(struct Scsi_Host *shost, |
1459 | struct scsi_cmnd *cmd) | |
9ba136d0 | 1460 | { |
5a3c2be6 | 1461 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
eba9ebaa | 1462 | struct fw_device *device = target_parent_device(lu->tgt); |
9ba136d0 | 1463 | struct sbp2_command_orb *orb; |
4bbc1bdd | 1464 | int generation, retval = SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1465 | |
c781c06d KH |
1466 | /* |
1467 | * Bidirectional commands are not yet implemented, and unknown | |
1468 | * transfer direction not handled. | |
1469 | */ | |
9ba136d0 | 1470 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
eba9ebaa | 1471 | dev_err(lu_dev(lu), "cannot handle bidirectional command\n"); |
e1b68c4d | 1472 | cmd->result = DID_ERROR << 16; |
b75ca5ea | 1473 | cmd->scsi_done(cmd); |
e1b68c4d | 1474 | return 0; |
9ba136d0 KH |
1475 | } |
1476 | ||
2d826cc5 | 1477 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
cfb0c9d1 | 1478 | if (orb == NULL) |
5a3c2be6 | 1479 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1480 | |
12f26aa1 KH |
1481 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
1482 | orb->base.rcode = -1; | |
e57d2011 | 1483 | kref_init(&orb->base.kref); |
b75ca5ea | 1484 | orb->cmd = cmd; |
a08e100a | 1485 | orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL); |
71ee9f01 | 1486 | orb->request.misc = cpu_to_be32( |
a08e100a | 1487 | COMMAND_ORB_MAX_PAYLOAD(lu->tgt->max_payload) | |
f1397490 | 1488 | COMMAND_ORB_SPEED(device->max_speed) | |
71ee9f01 | 1489 | COMMAND_ORB_NOTIFY); |
9ba136d0 KH |
1490 | |
1491 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
0d7dcbf2 | 1492 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION); |
9ba136d0 | 1493 | |
4bbc1bdd SR |
1494 | generation = device->generation; |
1495 | smp_rmb(); /* sbp2_map_scatterlist looks at tgt->address_high */ | |
1496 | ||
5a3c2be6 SR |
1497 | if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) |
1498 | goto out; | |
9ba136d0 | 1499 | |
64a87b24 | 1500 | memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len); |
9ba136d0 KH |
1501 | |
1502 | orb->base.callback = complete_command_orb; | |
8526392a SR |
1503 | orb->base.request_bus = |
1504 | dma_map_single(device->card->device, &orb->request, | |
1505 | sizeof(orb->request), DMA_TO_DEVICE); | |
5e212567 SR |
1506 | if (dma_mapping_error(device->card->device, orb->base.request_bus)) { |
1507 | sbp2_unmap_scatterlist(device->card->device, orb); | |
5a3c2be6 | 1508 | goto out; |
5e212567 | 1509 | } |
82eff9db | 1510 | |
4bbc1bdd | 1511 | sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation, |
5a3c2be6 SR |
1512 | lu->command_block_agent_address + SBP2_ORB_POINTER); |
1513 | retval = 0; | |
1514 | out: | |
e57d2011 | 1515 | kref_put(&orb->base.kref, free_orb); |
5a3c2be6 | 1516 | return retval; |
9ba136d0 KH |
1517 | } |
1518 | ||
cfb01381 SR |
1519 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1520 | { | |
5a3c2be6 | 1521 | struct sbp2_logical_unit *lu = sdev->hostdata; |
cfb01381 | 1522 | |
5513c5f6 SR |
1523 | /* (Re-)Adding logical units via the SCSI stack is not supported. */ |
1524 | if (!lu) | |
1525 | return -ENOSYS; | |
1526 | ||
cfb01381 SR |
1527 | sdev->allow_restart = 1; |
1528 | ||
26c72e22 CL |
1529 | /* |
1530 | * SBP-2 does not require any alignment, but we set it anyway | |
1531 | * for compatibility with earlier versions of this driver. | |
1532 | */ | |
8ac3a47c | 1533 | blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1); |
465ff318 | 1534 | |
5a3c2be6 | 1535 | if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
cfb01381 | 1536 | sdev->inquiry_len = 36; |
5a3c2be6 | 1537 | |
cfb01381 SR |
1538 | return 0; |
1539 | } | |
1540 | ||
9ba136d0 KH |
1541 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1542 | { | |
5a3c2be6 | 1543 | struct sbp2_logical_unit *lu = sdev->hostdata; |
9ba136d0 | 1544 | |
cfb01381 SR |
1545 | sdev->use_10_for_rw = 1; |
1546 | ||
2635f96f SR |
1547 | if (sbp2_param_exclusive_login) |
1548 | sdev->manage_start_stop = 1; | |
1549 | ||
cfb01381 SR |
1550 | if (sdev->type == TYPE_ROM) |
1551 | sdev->use_10_for_ms = 1; | |
5a3c2be6 | 1552 | |
9ba136d0 | 1553 | if (sdev->type == TYPE_DISK && |
5a3c2be6 | 1554 | lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
9ba136d0 | 1555 | sdev->skip_ms_page_8 = 1; |
5a3c2be6 SR |
1556 | |
1557 | if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) | |
9ba136d0 | 1558 | sdev->fix_capacity = 1; |
5a3c2be6 | 1559 | |
ffcaade3 SR |
1560 | if (lu->tgt->workarounds & SBP2_WORKAROUND_POWER_CONDITION) |
1561 | sdev->start_stop_pwr_cond = 1; | |
1562 | ||
5a3c2be6 | 1563 | if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
086fa5ff | 1564 | blk_queue_max_hw_sectors(sdev->request_queue, 128 * 1024 / 512); |
5a3c2be6 | 1565 | |
9ba136d0 KH |
1566 | return 0; |
1567 | } | |
1568 | ||
1569 | /* | |
1570 | * Called by scsi stack when something has really gone wrong. Usually | |
1571 | * called when a command has timed-out for some reason. | |
1572 | */ | |
1573 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1574 | { | |
5a3c2be6 | 1575 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
9ba136d0 | 1576 | |
eba9ebaa | 1577 | dev_notice(lu_dev(lu), "sbp2_scsi_abort\n"); |
5a3c2be6 SR |
1578 | sbp2_agent_reset(lu); |
1579 | sbp2_cancel_orbs(lu); | |
9ba136d0 KH |
1580 | |
1581 | return SUCCESS; | |
1582 | } | |
1583 | ||
14e21986 SR |
1584 | /* |
1585 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: | |
1586 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) | |
1587 | * | |
1588 | * This is the concatenation of target port identifier and logical unit | |
1589 | * identifier as per SAM-2...SAM-4 annex A. | |
1590 | */ | |
53dca511 SR |
1591 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
1592 | struct device_attribute *attr, char *buf) | |
14e21986 SR |
1593 | { |
1594 | struct scsi_device *sdev = to_scsi_device(dev); | |
5a3c2be6 | 1595 | struct sbp2_logical_unit *lu; |
14e21986 SR |
1596 | |
1597 | if (!sdev) | |
1598 | return 0; | |
14e21986 | 1599 | |
5a3c2be6 | 1600 | lu = sdev->hostdata; |
14e21986 | 1601 | |
c9755e14 SR |
1602 | return sprintf(buf, "%016llx:%06x:%04x\n", |
1603 | (unsigned long long)lu->tgt->guid, | |
5a3c2be6 | 1604 | lu->tgt->directory_id, lu->lun); |
14e21986 SR |
1605 | } |
1606 | ||
1607 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
1608 | ||
1609 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { | |
1610 | &dev_attr_ieee1394_id, | |
1611 | NULL | |
1612 | }; | |
1613 | ||
9ba136d0 KH |
1614 | static struct scsi_host_template scsi_driver_template = { |
1615 | .module = THIS_MODULE, | |
1616 | .name = "SBP-2 IEEE-1394", | |
0c22ecde | 1617 | .proc_name = "sbp2", |
9ba136d0 | 1618 | .queuecommand = sbp2_scsi_queuecommand, |
cfb01381 | 1619 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1620 | .slave_configure = sbp2_scsi_slave_configure, |
1621 | .eh_abort_handler = sbp2_scsi_abort, | |
1622 | .this_id = -1, | |
1623 | .sg_tablesize = SG_ALL, | |
1624 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1625 | .cmd_per_lun = 1, |
1626 | .can_queue = 1, | |
14e21986 | 1627 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
9ba136d0 KH |
1628 | }; |
1629 | ||
9ba136d0 KH |
1630 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1631 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1632 | MODULE_LICENSE("GPL"); | |
1633 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1634 | ||
1e4c7b0d | 1635 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1e4c7b0d | 1636 | MODULE_ALIAS("sbp2"); |
1e4c7b0d | 1637 | |
9ba136d0 KH |
1638 | static int __init sbp2_init(void) |
1639 | { | |
1640 | return driver_register(&sbp2_driver.driver); | |
1641 | } | |
1642 | ||
1643 | static void __exit sbp2_cleanup(void) | |
1644 | { | |
1645 | driver_unregister(&sbp2_driver.driver); | |
1646 | } | |
1647 | ||
1648 | module_init(sbp2_init); | |
1649 | module_exit(sbp2_cleanup); |