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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
c781c06d KH |
2 | /* |
3 | * SBP2 driver (SCSI over IEEE1394) | |
9ba136d0 | 4 | * |
27a15e50 | 5 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
9ba136d0 KH |
6 | */ |
7 | ||
c781c06d KH |
8 | /* |
9 | * The basic structure of this driver is based on the old storage driver, | |
27a15e50 KH |
10 | * drivers/ieee1394/sbp2.c, originally written by |
11 | * James Goodwin <jamesg@filanet.com> | |
12 | * with later contributions and ongoing maintenance from | |
13 | * Ben Collins <bcollins@debian.org>, | |
14 | * Stefan Richter <stefanr@s5r6.in-berlin.de> | |
15 | * and many others. | |
16 | */ | |
17 | ||
7bb6bf7c | 18 | #include <linux/blkdev.h> |
09b12dd4 | 19 | #include <linux/bug.h> |
e8ca9702 | 20 | #include <linux/completion.h> |
7bb6bf7c SR |
21 | #include <linux/delay.h> |
22 | #include <linux/device.h> | |
23 | #include <linux/dma-mapping.h> | |
77c9a5da | 24 | #include <linux/firewire.h> |
e8ca9702 SR |
25 | #include <linux/firewire-constants.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/jiffies.h> | |
9ba136d0 | 28 | #include <linux/kernel.h> |
e8ca9702 SR |
29 | #include <linux/kref.h> |
30 | #include <linux/list.h> | |
7bb6bf7c | 31 | #include <linux/mod_devicetable.h> |
9ba136d0 | 32 | #include <linux/module.h> |
5cd54c94 | 33 | #include <linux/moduleparam.h> |
0b5b2903 | 34 | #include <linux/scatterlist.h> |
e8ca9702 SR |
35 | #include <linux/slab.h> |
36 | #include <linux/spinlock.h> | |
e7cdf237 | 37 | #include <linux/string.h> |
2df222b8 | 38 | #include <linux/stringify.h> |
df8ec249 | 39 | #include <linux/workqueue.h> |
e8ca9702 SR |
40 | |
41 | #include <asm/byteorder.h> | |
9ba136d0 KH |
42 | |
43 | #include <scsi/scsi.h> | |
44 | #include <scsi/scsi_cmnd.h> | |
9ba136d0 KH |
45 | #include <scsi/scsi_device.h> |
46 | #include <scsi/scsi_host.h> | |
47 | ||
5cd54c94 SR |
48 | /* |
49 | * So far only bridges from Oxford Semiconductor are known to support | |
50 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
51 | * are possible on OXFW911 and newer Oxsemi bridges. | |
52 | * | |
53 | * Concurrent logins are useful together with cluster filesystems. | |
54 | */ | |
90ab5ee9 | 55 | static bool sbp2_param_exclusive_login = 1; |
5cd54c94 SR |
56 | module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); |
57 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " | |
58 | "(default = Y, use N for concurrent initiators)"); | |
59 | ||
2df222b8 SR |
60 | /* |
61 | * Flags for firmware oddities | |
62 | * | |
63 | * - 128kB max transfer | |
64 | * Limit transfer size. Necessary for some old bridges. | |
65 | * | |
66 | * - 36 byte inquiry | |
67 | * When scsi_mod probes the device, let the inquiry command look like that | |
68 | * from MS Windows. | |
69 | * | |
70 | * - skip mode page 8 | |
71 | * Suppress sending of mode_sense for mode page 8 if the device pretends to | |
72 | * support the SCSI Primary Block commands instead of Reduced Block Commands. | |
73 | * | |
74 | * - fix capacity | |
75 | * Tell sd_mod to correct the last sector number reported by read_capacity. | |
76 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. | |
77 | * Don't use this with devices which don't have this bug. | |
78 | * | |
9220f194 SR |
79 | * - delay inquiry |
80 | * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry. | |
81 | * | |
ffcaade3 SR |
82 | * - power condition |
83 | * Set the power condition field in the START STOP UNIT commands sent by | |
84 | * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on). | |
85 | * Some disks need this to spin down or to resume properly. | |
86 | * | |
2df222b8 SR |
87 | * - override internal blacklist |
88 | * Instead of adding to the built-in blacklist, use only the workarounds | |
89 | * specified in the module load parameter. | |
90 | * Useful if a blacklist entry interfered with a non-broken device. | |
91 | */ | |
92 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 | |
93 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 | |
94 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 | |
95 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 | |
9220f194 SR |
96 | #define SBP2_WORKAROUND_DELAY_INQUIRY 0x10 |
97 | #define SBP2_INQUIRY_DELAY 12 | |
ffcaade3 | 98 | #define SBP2_WORKAROUND_POWER_CONDITION 0x20 |
2df222b8 SR |
99 | #define SBP2_WORKAROUND_OVERRIDE 0x100 |
100 | ||
101 | static int sbp2_param_workarounds; | |
102 | module_param_named(workarounds, sbp2_param_workarounds, int, 0644); | |
103 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
104 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
105 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
106 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
107 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) | |
9220f194 | 108 | ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY) |
ffcaade3 SR |
109 | ", set power condition in start stop unit = " |
110 | __stringify(SBP2_WORKAROUND_POWER_CONDITION) | |
2df222b8 SR |
111 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
112 | ", or a combination)"); | |
113 | ||
5a3c2be6 SR |
114 | /* |
115 | * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry | |
116 | * and one struct scsi_device per sbp2_logical_unit. | |
117 | */ | |
118 | struct sbp2_logical_unit { | |
119 | struct sbp2_target *tgt; | |
120 | struct list_head link; | |
9ba136d0 KH |
121 | struct fw_address_handler address_handler; |
122 | struct list_head orb_list; | |
5a3c2be6 | 123 | |
9ba136d0 | 124 | u64 command_block_agent_address; |
5a3c2be6 | 125 | u16 lun; |
9ba136d0 KH |
126 | int login_id; |
127 | ||
c781c06d | 128 | /* |
5a3c2be6 SR |
129 | * The generation is updated once we've logged in or reconnected |
130 | * to the logical unit. Thus, I/O to the device will automatically | |
131 | * fail and get retried if it happens in a window where the device | |
132 | * is not ready, e.g. after a bus reset but before we reconnect. | |
c781c06d | 133 | */ |
9ba136d0 | 134 | int generation; |
7f37c426 | 135 | int retries; |
70044d71 | 136 | work_func_t workfn; |
7f37c426 | 137 | struct delayed_work work; |
f8436158 | 138 | bool has_sdev; |
2e2705bd | 139 | bool blocked; |
9ba136d0 KH |
140 | }; |
141 | ||
b2af07b6 SR |
142 | static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay) |
143 | { | |
144 | queue_delayed_work(fw_workqueue, &lu->work, delay); | |
145 | } | |
146 | ||
5a3c2be6 SR |
147 | /* |
148 | * We create one struct sbp2_target per IEEE 1212 Unit Directory | |
149 | * and one struct Scsi_Host per sbp2_target. | |
150 | */ | |
151 | struct sbp2_target { | |
5a3c2be6 | 152 | struct fw_unit *unit; |
05cca738 | 153 | struct list_head lu_list; |
5a3c2be6 SR |
154 | |
155 | u64 management_agent_address; | |
c9755e14 | 156 | u64 guid; |
5a3c2be6 SR |
157 | int directory_id; |
158 | int node_id; | |
159 | int address_high; | |
05cca738 | 160 | unsigned int workarounds; |
384170da | 161 | unsigned int mgt_orb_timeout; |
a08e100a | 162 | unsigned int max_payload; |
2e2705bd | 163 | |
d737d7da | 164 | spinlock_t lock; |
2e2705bd SR |
165 | int dont_block; /* counter for each logical unit */ |
166 | int blocked; /* ditto */ | |
5a3c2be6 SR |
167 | }; |
168 | ||
eba9ebaa | 169 | static struct fw_device *target_parent_device(struct sbp2_target *tgt) |
e5110d01 SR |
170 | { |
171 | return fw_parent_device(tgt->unit); | |
172 | } | |
173 | ||
eba9ebaa SR |
174 | static const struct device *tgt_dev(const struct sbp2_target *tgt) |
175 | { | |
176 | return &tgt->unit->device; | |
177 | } | |
178 | ||
179 | static const struct device *lu_dev(const struct sbp2_logical_unit *lu) | |
180 | { | |
181 | return &lu->tgt->unit->device; | |
182 | } | |
183 | ||
cd1f70fd JF |
184 | /* Impossible login_id, to detect logout attempt before successful login */ |
185 | #define INVALID_LOGIN_ID 0x10000 | |
186 | ||
eaf76e0d | 187 | #define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */ |
9ba136d0 | 188 | #define SBP2_ORB_NULL 0x80000000 |
17cff9ff JW |
189 | #define SBP2_RETRY_LIMIT 0xf /* 15 retries */ |
190 | #define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */ | |
9ba136d0 | 191 | |
af271941 SR |
192 | /* |
193 | * There is no transport protocol limit to the CDB length, but we implement | |
194 | * a fixed length only. 16 bytes is enough for disks larger than 2 TB. | |
195 | */ | |
196 | #define SBP2_MAX_CDB_SIZE 16 | |
197 | ||
09b12dd4 | 198 | /* |
26c72e22 CL |
199 | * The maximum SBP-2 data buffer size is 0xffff. We quadlet-align this |
200 | * for compatibility with earlier versions of this driver. | |
09b12dd4 SR |
201 | */ |
202 | #define SBP2_MAX_SEG_SIZE 0xfffc | |
203 | ||
9ba136d0 | 204 | /* Unit directory keys */ |
384170da | 205 | #define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a |
5a3c2be6 SR |
206 | #define SBP2_CSR_FIRMWARE_REVISION 0x3c |
207 | #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 | |
8ff6a757 | 208 | #define SBP2_CSR_UNIT_UNIQUE_ID 0x8d |
5a3c2be6 | 209 | #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 |
9ba136d0 | 210 | |
9ba136d0 KH |
211 | /* Management orb opcodes */ |
212 | #define SBP2_LOGIN_REQUEST 0x0 | |
213 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
214 | #define SBP2_RECONNECT_REQUEST 0x3 | |
215 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
216 | #define SBP2_LOGOUT_REQUEST 0x7 | |
217 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
218 | #define SBP2_ABORT_TASK_SET 0xc | |
219 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
220 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
221 | ||
222 | /* Offsets for command block agent registers */ | |
223 | #define SBP2_AGENT_STATE 0x00 | |
224 | #define SBP2_AGENT_RESET 0x04 | |
225 | #define SBP2_ORB_POINTER 0x08 | |
226 | #define SBP2_DOORBELL 0x10 | |
227 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
228 | ||
229 | /* Status write response codes */ | |
230 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
231 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
232 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
233 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
234 | ||
a77754a7 KH |
235 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
236 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) | |
237 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) | |
238 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) | |
239 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) | |
240 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) | |
241 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) | |
242 | #define STATUS_GET_DATA(v) ((v).data) | |
9ba136d0 KH |
243 | |
244 | struct sbp2_status { | |
245 | u32 status; | |
246 | u32 orb_low; | |
247 | u8 data[24]; | |
248 | }; | |
249 | ||
250 | struct sbp2_pointer { | |
71ee9f01 SR |
251 | __be32 high; |
252 | __be32 low; | |
9ba136d0 KH |
253 | }; |
254 | ||
255 | struct sbp2_orb { | |
256 | struct fw_transaction t; | |
e57d2011 | 257 | struct kref kref; |
9ba136d0 KH |
258 | dma_addr_t request_bus; |
259 | int rcode; | |
a98e2719 | 260 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
d737d7da | 261 | struct sbp2_logical_unit *lu; |
9ba136d0 KH |
262 | struct list_head link; |
263 | }; | |
264 | ||
a77754a7 KH |
265 | #define MANAGEMENT_ORB_LUN(v) ((v)) |
266 | #define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16) | |
267 | #define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20) | |
5cd54c94 | 268 | #define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0) |
a77754a7 KH |
269 | #define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29) |
270 | #define MANAGEMENT_ORB_NOTIFY ((1) << 31) | |
9ba136d0 | 271 | |
a77754a7 KH |
272 | #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) |
273 | #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) | |
9ba136d0 KH |
274 | |
275 | struct sbp2_management_orb { | |
276 | struct sbp2_orb base; | |
277 | struct { | |
278 | struct sbp2_pointer password; | |
279 | struct sbp2_pointer response; | |
71ee9f01 SR |
280 | __be32 misc; |
281 | __be32 length; | |
9ba136d0 KH |
282 | struct sbp2_pointer status_fifo; |
283 | } request; | |
284 | __be32 response[4]; | |
285 | dma_addr_t response_bus; | |
286 | struct completion done; | |
287 | struct sbp2_status status; | |
288 | }; | |
289 | ||
9ba136d0 | 290 | struct sbp2_login_response { |
71ee9f01 | 291 | __be32 misc; |
9ba136d0 | 292 | struct sbp2_pointer command_block_agent; |
71ee9f01 | 293 | __be32 reconnect_hold; |
9ba136d0 | 294 | }; |
a77754a7 KH |
295 | #define COMMAND_ORB_DATA_SIZE(v) ((v)) |
296 | #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) | |
297 | #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) | |
298 | #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) | |
299 | #define COMMAND_ORB_SPEED(v) ((v) << 24) | |
0d7dcbf2 | 300 | #define COMMAND_ORB_DIRECTION ((1) << 27) |
a77754a7 KH |
301 | #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) |
302 | #define COMMAND_ORB_NOTIFY ((1) << 31) | |
9ba136d0 KH |
303 | |
304 | struct sbp2_command_orb { | |
305 | struct sbp2_orb base; | |
306 | struct { | |
307 | struct sbp2_pointer next; | |
308 | struct sbp2_pointer data_descriptor; | |
71ee9f01 | 309 | __be32 misc; |
af271941 | 310 | u8 command_block[SBP2_MAX_CDB_SIZE]; |
9ba136d0 KH |
311 | } request; |
312 | struct scsi_cmnd *cmd; | |
9ba136d0 | 313 | |
9fb2dd12 | 314 | struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); |
9ba136d0 | 315 | dma_addr_t page_table_bus; |
9ba136d0 KH |
316 | }; |
317 | ||
f746072a SR |
318 | #define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */ |
319 | #define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */ | |
320 | ||
9ba136d0 KH |
321 | /* |
322 | * List of devices with known bugs. | |
323 | * | |
324 | * The firmware_revision field, masked with 0xffff00, is the best | |
325 | * indicator for the type of bridge chip of a device. It yields a few | |
326 | * false positives but this did not break correctly behaving devices | |
f746072a | 327 | * so far. |
9ba136d0 KH |
328 | */ |
329 | static const struct { | |
330 | u32 firmware_revision; | |
331 | u32 model; | |
05cca738 | 332 | unsigned int workarounds; |
9ba136d0 KH |
333 | } sbp2_workarounds_table[] = { |
334 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
335 | .firmware_revision = 0x002800, | |
336 | .model = 0x001010, | |
337 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
ffcaade3 SR |
338 | SBP2_WORKAROUND_MODE_SENSE_8 | |
339 | SBP2_WORKAROUND_POWER_CONDITION, | |
9ba136d0 | 340 | }, |
9220f194 SR |
341 | /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { |
342 | .firmware_revision = 0x002800, | |
343 | .model = 0x000000, | |
3c5f8035 | 344 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
9220f194 | 345 | }, |
9ba136d0 KH |
346 | /* Initio bridges, actually only needed for some older ones */ { |
347 | .firmware_revision = 0x000200, | |
f746072a | 348 | .model = SBP2_ROM_VALUE_WILDCARD, |
9ba136d0 KH |
349 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
350 | }, | |
ffcaade3 SR |
351 | /* PL-3507 bridge with Prolific firmware */ { |
352 | .firmware_revision = 0x012800, | |
f746072a | 353 | .model = SBP2_ROM_VALUE_WILDCARD, |
ffcaade3 SR |
354 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
355 | }, | |
9ba136d0 KH |
356 | /* Symbios bridge */ { |
357 | .firmware_revision = 0xa0b800, | |
f746072a | 358 | .model = SBP2_ROM_VALUE_WILDCARD, |
9ba136d0 KH |
359 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
360 | }, | |
2aa9ff7f SR |
361 | /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ { |
362 | .firmware_revision = 0x002600, | |
f746072a | 363 | .model = SBP2_ROM_VALUE_WILDCARD, |
2aa9ff7f SR |
364 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
365 | }, | |
c781c06d | 366 | /* |
c8c4707c SR |
367 | * iPod 2nd generation: needs 128k max transfer size workaround |
368 | * iPod 3rd generation: needs fix capacity workaround | |
c781c06d | 369 | */ |
c8c4707c SR |
370 | { |
371 | .firmware_revision = 0x0a2700, | |
372 | .model = 0x000000, | |
373 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS | | |
374 | SBP2_WORKAROUND_FIX_CAPACITY, | |
375 | }, | |
376 | /* iPod 4th generation */ { | |
9ba136d0 KH |
377 | .firmware_revision = 0x0a2700, |
378 | .model = 0x000021, | |
379 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
380 | }, | |
031bb27c SR |
381 | /* iPod mini */ { |
382 | .firmware_revision = 0x0a2700, | |
383 | .model = 0x000022, | |
384 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
385 | }, | |
9ba136d0 KH |
386 | /* iPod mini */ { |
387 | .firmware_revision = 0x0a2700, | |
388 | .model = 0x000023, | |
389 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
390 | }, | |
391 | /* iPod Photo */ { | |
392 | .firmware_revision = 0x0a2700, | |
393 | .model = 0x00007e, | |
394 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
395 | } | |
396 | }; | |
397 | ||
53dca511 | 398 | static void free_orb(struct kref *kref) |
e57d2011 KH |
399 | { |
400 | struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); | |
401 | ||
402 | kfree(orb); | |
403 | } | |
404 | ||
53dca511 SR |
405 | static void sbp2_status_write(struct fw_card *card, struct fw_request *request, |
406 | int tcode, int destination, int source, | |
33e553fe | 407 | int generation, unsigned long long offset, |
53dca511 | 408 | void *payload, size_t length, void *callback_data) |
9ba136d0 | 409 | { |
5a3c2be6 | 410 | struct sbp2_logical_unit *lu = callback_data; |
9ba136d0 KH |
411 | struct sbp2_orb *orb; |
412 | struct sbp2_status status; | |
9ba136d0 KH |
413 | unsigned long flags; |
414 | ||
415 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
094614fc | 416 | length < 8 || length > sizeof(status)) { |
9ba136d0 KH |
417 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
418 | return; | |
419 | } | |
420 | ||
094614fc SR |
421 | status.status = be32_to_cpup(payload); |
422 | status.orb_low = be32_to_cpup(payload + 4); | |
423 | memset(status.data, 0, sizeof(status.data)); | |
424 | if (length > 8) | |
425 | memcpy(status.data, payload + 8, length - 8); | |
426 | ||
a77754a7 | 427 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
eba9ebaa SR |
428 | dev_notice(lu_dev(lu), |
429 | "non-ORB related status write, not handled\n"); | |
9ba136d0 KH |
430 | fw_send_response(card, request, RCODE_COMPLETE); |
431 | return; | |
432 | } | |
433 | ||
434 | /* Lookup the orb corresponding to this status write. */ | |
d737d7da | 435 | spin_lock_irqsave(&lu->tgt->lock, flags); |
5a3c2be6 | 436 | list_for_each_entry(orb, &lu->orb_list, link) { |
a77754a7 | 437 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
e57d2011 KH |
438 | STATUS_GET_ORB_LOW(status) == orb->request_bus) { |
439 | orb->rcode = RCODE_COMPLETE; | |
9ba136d0 KH |
440 | list_del(&orb->link); |
441 | break; | |
442 | } | |
443 | } | |
d737d7da | 444 | spin_unlock_irqrestore(&lu->tgt->lock, flags); |
9ba136d0 | 445 | |
baed6b82 | 446 | if (&orb->link != &lu->orb_list) { |
9ba136d0 | 447 | orb->callback(orb, &status); |
6c74340b | 448 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
baed6b82 | 449 | } else { |
eba9ebaa | 450 | dev_err(lu_dev(lu), "status write for unknown ORB\n"); |
baed6b82 | 451 | } |
e57d2011 | 452 | |
9ba136d0 KH |
453 | fw_send_response(card, request, RCODE_COMPLETE); |
454 | } | |
455 | ||
53dca511 SR |
456 | static void complete_transaction(struct fw_card *card, int rcode, |
457 | void *payload, size_t length, void *data) | |
9ba136d0 KH |
458 | { |
459 | struct sbp2_orb *orb = data; | |
460 | unsigned long flags; | |
461 | ||
e57d2011 KH |
462 | /* |
463 | * This is a little tricky. We can get the status write for | |
464 | * the orb before we get this callback. The status write | |
465 | * handler above will assume the orb pointer transaction was | |
466 | * successful and set the rcode to RCODE_COMPLETE for the orb. | |
467 | * So this callback only sets the rcode if it hasn't already | |
468 | * been set and only does the cleanup if the transaction | |
469 | * failed and we didn't already get a status write. | |
470 | */ | |
d737d7da | 471 | spin_lock_irqsave(&orb->lu->tgt->lock, flags); |
e57d2011 KH |
472 | |
473 | if (orb->rcode == -1) | |
474 | orb->rcode = rcode; | |
7a4e1e9c | 475 | if (orb->rcode != RCODE_COMPLETE) { |
9ba136d0 | 476 | list_del(&orb->link); |
d737d7da | 477 | spin_unlock_irqrestore(&orb->lu->tgt->lock, flags); |
6c74340b | 478 | |
9ba136d0 | 479 | orb->callback(orb, NULL); |
6c74340b | 480 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
1b34e974 | 481 | } else { |
d737d7da | 482 | spin_unlock_irqrestore(&orb->lu->tgt->lock, flags); |
9ba136d0 | 483 | } |
e57d2011 | 484 | |
6c74340b | 485 | kref_put(&orb->kref, free_orb); /* transaction callback reference */ |
9ba136d0 KH |
486 | } |
487 | ||
53dca511 SR |
488 | static void sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, |
489 | int node_id, int generation, u64 offset) | |
9ba136d0 | 490 | { |
eba9ebaa | 491 | struct fw_device *device = target_parent_device(lu->tgt); |
81bf52d8 | 492 | struct sbp2_pointer orb_pointer; |
9ba136d0 KH |
493 | unsigned long flags; |
494 | ||
81bf52d8 SR |
495 | orb_pointer.high = 0; |
496 | orb_pointer.low = cpu_to_be32(orb->request_bus); | |
9ba136d0 | 497 | |
d737d7da SR |
498 | orb->lu = lu; |
499 | spin_lock_irqsave(&lu->tgt->lock, flags); | |
5a3c2be6 | 500 | list_add_tail(&orb->link, &lu->orb_list); |
d737d7da | 501 | spin_unlock_irqrestore(&lu->tgt->lock, flags); |
9ba136d0 | 502 | |
6c74340b SR |
503 | kref_get(&orb->kref); /* transaction callback reference */ |
504 | kref_get(&orb->kref); /* orb callback reference */ | |
e57d2011 | 505 | |
9ba136d0 | 506 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
f1397490 | 507 | node_id, generation, device->max_speed, offset, |
81bf52d8 | 508 | &orb_pointer, 8, complete_transaction, orb); |
9ba136d0 KH |
509 | } |
510 | ||
5a3c2be6 | 511 | static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |
9ba136d0 | 512 | { |
eba9ebaa | 513 | struct fw_device *device = target_parent_device(lu->tgt); |
9ba136d0 KH |
514 | struct sbp2_orb *orb, *next; |
515 | struct list_head list; | |
2aaad97b | 516 | int retval = -ENOENT; |
9ba136d0 KH |
517 | |
518 | INIT_LIST_HEAD(&list); | |
d737d7da | 519 | spin_lock_irq(&lu->tgt->lock); |
5a3c2be6 | 520 | list_splice_init(&lu->orb_list, &list); |
d737d7da | 521 | spin_unlock_irq(&lu->tgt->lock); |
9ba136d0 KH |
522 | |
523 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 524 | retval = 0; |
7a4e1e9c SR |
525 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
526 | continue; | |
730c32f5 | 527 | |
9ba136d0 KH |
528 | orb->rcode = RCODE_CANCELLED; |
529 | orb->callback(orb, NULL); | |
6c74340b | 530 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
9ba136d0 | 531 | } |
9ba136d0 | 532 | |
2aaad97b | 533 | return retval; |
1d3d52c5 KH |
534 | } |
535 | ||
53dca511 SR |
536 | static void complete_management_orb(struct sbp2_orb *base_orb, |
537 | struct sbp2_status *status) | |
9ba136d0 KH |
538 | { |
539 | struct sbp2_management_orb *orb = | |
6f061487 | 540 | container_of(base_orb, struct sbp2_management_orb, base); |
9ba136d0 KH |
541 | |
542 | if (status) | |
2d826cc5 | 543 | memcpy(&orb->status, status, sizeof(*status)); |
9ba136d0 KH |
544 | complete(&orb->done); |
545 | } | |
546 | ||
53dca511 SR |
547 | static int sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id, |
548 | int generation, int function, | |
549 | int lun_or_login_id, void *response) | |
9ba136d0 | 550 | { |
eba9ebaa | 551 | struct fw_device *device = target_parent_device(lu->tgt); |
9ba136d0 | 552 | struct sbp2_management_orb *orb; |
a4c379c1 | 553 | unsigned int timeout; |
9ba136d0 KH |
554 | int retval = -ENOMEM; |
555 | ||
be6f48b0 SR |
556 | if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device)) |
557 | return 0; | |
558 | ||
c13ccfcf | 559 | orb = kzalloc(sizeof(*orb), GFP_NOIO); |
9ba136d0 KH |
560 | if (orb == NULL) |
561 | return -ENOMEM; | |
562 | ||
e57d2011 | 563 | kref_init(&orb->base.kref); |
9ba136d0 KH |
564 | orb->response_bus = |
565 | dma_map_single(device->card->device, &orb->response, | |
2d826cc5 | 566 | sizeof(orb->response), DMA_FROM_DEVICE); |
8d8bb39b | 567 | if (dma_mapping_error(device->card->device, orb->response_bus)) |
7aa48481 | 568 | goto fail_mapping_response; |
9ba136d0 | 569 | |
71ee9f01 SR |
570 | orb->request.response.high = 0; |
571 | orb->request.response.low = cpu_to_be32(orb->response_bus); | |
9ba136d0 | 572 | |
71ee9f01 | 573 | orb->request.misc = cpu_to_be32( |
a77754a7 KH |
574 | MANAGEMENT_ORB_NOTIFY | |
575 | MANAGEMENT_ORB_FUNCTION(function) | | |
71ee9f01 SR |
576 | MANAGEMENT_ORB_LUN(lun_or_login_id)); |
577 | orb->request.length = cpu_to_be32( | |
578 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response))); | |
9ba136d0 | 579 | |
71ee9f01 SR |
580 | orb->request.status_fifo.high = |
581 | cpu_to_be32(lu->address_handler.offset >> 32); | |
582 | orb->request.status_fifo.low = | |
583 | cpu_to_be32(lu->address_handler.offset); | |
9ba136d0 | 584 | |
9ba136d0 | 585 | if (function == SBP2_LOGIN_REQUEST) { |
14dc992a | 586 | /* Ask for 2^2 == 4 seconds reconnect grace period */ |
71ee9f01 | 587 | orb->request.misc |= cpu_to_be32( |
14dc992a | 588 | MANAGEMENT_ORB_RECONNECT(2) | |
71ee9f01 | 589 | MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login)); |
384170da | 590 | timeout = lu->tgt->mgt_orb_timeout; |
a4c379c1 JW |
591 | } else { |
592 | timeout = SBP2_ORB_TIMEOUT; | |
9ba136d0 KH |
593 | } |
594 | ||
9ba136d0 KH |
595 | init_completion(&orb->done); |
596 | orb->base.callback = complete_management_orb; | |
2aaad97b | 597 | |
7aa48481 SR |
598 | orb->base.request_bus = |
599 | dma_map_single(device->card->device, &orb->request, | |
600 | sizeof(orb->request), DMA_TO_DEVICE); | |
8d8bb39b | 601 | if (dma_mapping_error(device->card->device, orb->base.request_bus)) |
7aa48481 SR |
602 | goto fail_mapping_request; |
603 | ||
5a3c2be6 SR |
604 | sbp2_send_orb(&orb->base, lu, node_id, generation, |
605 | lu->tgt->management_agent_address); | |
9ba136d0 | 606 | |
a4c379c1 | 607 | wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout)); |
9ba136d0 | 608 | |
9ba136d0 | 609 | retval = -EIO; |
5a3c2be6 | 610 | if (sbp2_cancel_orbs(lu) == 0) { |
eba9ebaa SR |
611 | dev_err(lu_dev(lu), "ORB reply timed out, rcode 0x%02x\n", |
612 | orb->base.rcode); | |
9ba136d0 KH |
613 | goto out; |
614 | } | |
615 | ||
2aaad97b | 616 | if (orb->base.rcode != RCODE_COMPLETE) { |
eba9ebaa SR |
617 | dev_err(lu_dev(lu), "management write failed, rcode 0x%02x\n", |
618 | orb->base.rcode); | |
9ba136d0 KH |
619 | goto out; |
620 | } | |
621 | ||
a77754a7 KH |
622 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
623 | STATUS_GET_SBP_STATUS(orb->status) != 0) { | |
eba9ebaa | 624 | dev_err(lu_dev(lu), "error status: %d:%d\n", |
a77754a7 KH |
625 | STATUS_GET_RESPONSE(orb->status), |
626 | STATUS_GET_SBP_STATUS(orb->status)); | |
9ba136d0 KH |
627 | goto out; |
628 | } | |
629 | ||
630 | retval = 0; | |
631 | out: | |
632 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 633 | sizeof(orb->request), DMA_TO_DEVICE); |
7aa48481 | 634 | fail_mapping_request: |
9ba136d0 | 635 | dma_unmap_single(device->card->device, orb->response_bus, |
2d826cc5 | 636 | sizeof(orb->response), DMA_FROM_DEVICE); |
7aa48481 | 637 | fail_mapping_response: |
9ba136d0 | 638 | if (response) |
71ee9f01 | 639 | memcpy(response, orb->response, sizeof(orb->response)); |
e57d2011 | 640 | kref_put(&orb->base.kref, free_orb); |
9ba136d0 KH |
641 | |
642 | return retval; | |
643 | } | |
644 | ||
e0e60215 SR |
645 | static void sbp2_agent_reset(struct sbp2_logical_unit *lu) |
646 | { | |
eba9ebaa | 647 | struct fw_device *device = target_parent_device(lu->tgt); |
1e119fa9 | 648 | __be32 d = 0; |
9ba136d0 | 649 | |
1e119fa9 JF |
650 | fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, |
651 | lu->tgt->node_id, lu->generation, device->max_speed, | |
652 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
e847cc83 | 653 | &d, 4); |
9ba136d0 KH |
654 | } |
655 | ||
53dca511 SR |
656 | static void complete_agent_reset_write_no_wait(struct fw_card *card, |
657 | int rcode, void *payload, size_t length, void *data) | |
e0e60215 SR |
658 | { |
659 | kfree(data); | |
660 | } | |
661 | ||
662 | static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu) | |
9ba136d0 | 663 | { |
eba9ebaa | 664 | struct fw_device *device = target_parent_device(lu->tgt); |
9ba136d0 | 665 | struct fw_transaction *t; |
1e119fa9 | 666 | static __be32 d; |
9ba136d0 | 667 | |
e0e60215 | 668 | t = kmalloc(sizeof(*t), GFP_ATOMIC); |
9ba136d0 | 669 | if (t == NULL) |
e0e60215 | 670 | return; |
9ba136d0 KH |
671 | |
672 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
5a3c2be6 SR |
673 | lu->tgt->node_id, lu->generation, device->max_speed, |
674 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
e847cc83 | 675 | &d, 4, complete_agent_reset_write_no_wait, t); |
9ba136d0 KH |
676 | } |
677 | ||
d737d7da | 678 | static inline void sbp2_allow_block(struct sbp2_target *tgt) |
2e2705bd | 679 | { |
d737d7da | 680 | spin_lock_irq(&tgt->lock); |
0765cbd3 | 681 | --tgt->dont_block; |
d737d7da | 682 | spin_unlock_irq(&tgt->lock); |
2e2705bd SR |
683 | } |
684 | ||
685 | /* | |
686 | * Blocks lu->tgt if all of the following conditions are met: | |
687 | * - Login, INQUIRY, and high-level SCSI setup of all of the target's | |
688 | * logical units have been finished (indicated by dont_block == 0). | |
689 | * - lu->generation is stale. | |
690 | * | |
d737d7da | 691 | * Note, scsi_block_requests() must be called while holding tgt->lock, |
2e2705bd SR |
692 | * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to |
693 | * unblock the target. | |
694 | */ | |
695 | static void sbp2_conditionally_block(struct sbp2_logical_unit *lu) | |
696 | { | |
697 | struct sbp2_target *tgt = lu->tgt; | |
eba9ebaa | 698 | struct fw_card *card = target_parent_device(tgt)->card; |
2e2705bd SR |
699 | struct Scsi_Host *shost = |
700 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
701 | unsigned long flags; | |
702 | ||
d737d7da | 703 | spin_lock_irqsave(&tgt->lock, flags); |
2e2705bd SR |
704 | if (!tgt->dont_block && !lu->blocked && |
705 | lu->generation != card->generation) { | |
706 | lu->blocked = true; | |
a5fd9ec7 | 707 | if (++tgt->blocked == 1) |
2e2705bd | 708 | scsi_block_requests(shost); |
2e2705bd | 709 | } |
d737d7da | 710 | spin_unlock_irqrestore(&tgt->lock, flags); |
2e2705bd SR |
711 | } |
712 | ||
713 | /* | |
714 | * Unblocks lu->tgt as soon as all its logical units can be unblocked. | |
715 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
d737d7da | 716 | * tgt->lock protected section. On the other hand, running it inside |
2e2705bd SR |
717 | * the section might clash with shost->host_lock. |
718 | */ | |
719 | static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu) | |
720 | { | |
721 | struct sbp2_target *tgt = lu->tgt; | |
eba9ebaa | 722 | struct fw_card *card = target_parent_device(tgt)->card; |
2e2705bd SR |
723 | struct Scsi_Host *shost = |
724 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
2e2705bd SR |
725 | bool unblock = false; |
726 | ||
d737d7da | 727 | spin_lock_irq(&tgt->lock); |
2e2705bd SR |
728 | if (lu->blocked && lu->generation == card->generation) { |
729 | lu->blocked = false; | |
730 | unblock = --tgt->blocked == 0; | |
731 | } | |
d737d7da | 732 | spin_unlock_irq(&tgt->lock); |
2e2705bd | 733 | |
a5fd9ec7 | 734 | if (unblock) |
2e2705bd | 735 | scsi_unblock_requests(shost); |
2e2705bd SR |
736 | } |
737 | ||
738 | /* | |
739 | * Prevents future blocking of tgt and unblocks it. | |
740 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
d737d7da | 741 | * tgt->lock protected section. On the other hand, running it inside |
2e2705bd SR |
742 | * the section might clash with shost->host_lock. |
743 | */ | |
744 | static void sbp2_unblock(struct sbp2_target *tgt) | |
745 | { | |
2e2705bd SR |
746 | struct Scsi_Host *shost = |
747 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
2e2705bd | 748 | |
d737d7da | 749 | spin_lock_irq(&tgt->lock); |
2e2705bd | 750 | ++tgt->dont_block; |
d737d7da | 751 | spin_unlock_irq(&tgt->lock); |
2e2705bd SR |
752 | |
753 | scsi_unblock_requests(shost); | |
754 | } | |
755 | ||
f8436158 SR |
756 | static int sbp2_lun2int(u16 lun) |
757 | { | |
758 | struct scsi_lun eight_bytes_lun; | |
759 | ||
760 | memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); | |
761 | eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff; | |
762 | eight_bytes_lun.scsi_lun[1] = lun & 0xff; | |
763 | ||
764 | return scsilun_to_int(&eight_bytes_lun); | |
765 | } | |
766 | ||
17cff9ff JW |
767 | /* |
768 | * Write retransmit retry values into the BUSY_TIMEOUT register. | |
769 | * - The single-phase retry protocol is supported by all SBP-2 devices, but the | |
770 | * default retry_limit value is 0 (i.e. never retry transmission). We write a | |
771 | * saner value after logging into the device. | |
772 | * - The dual-phase retry protocol is optional to implement, and if not | |
773 | * supported, writes to the dual-phase portion of the register will be | |
774 | * ignored. We try to write the original 1394-1995 default here. | |
775 | * - In the case of devices that are also SBP-3-compliant, all writes are | |
776 | * ignored, as the register is read-only, but contains single-phase retry of | |
777 | * 15, which is what we're trying to set for all SBP-2 device anyway, so this | |
778 | * write attempt is safe and yields more consistent behavior for all devices. | |
779 | * | |
780 | * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec, | |
781 | * and section 6.4 of the SBP-3 spec for further details. | |
782 | */ | |
51f9dbef JW |
783 | static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu) |
784 | { | |
eba9ebaa | 785 | struct fw_device *device = target_parent_device(lu->tgt); |
1e119fa9 | 786 | __be32 d = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT); |
51f9dbef | 787 | |
1e119fa9 JF |
788 | fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, |
789 | lu->tgt->node_id, lu->generation, device->max_speed, | |
e847cc83 | 790 | CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT, &d, 4); |
51f9dbef JW |
791 | } |
792 | ||
5a3c2be6 SR |
793 | static void sbp2_reconnect(struct work_struct *work); |
794 | ||
7f37c426 KH |
795 | static void sbp2_login(struct work_struct *work) |
796 | { | |
5a3c2be6 SR |
797 | struct sbp2_logical_unit *lu = |
798 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 | 799 | struct sbp2_target *tgt = lu->tgt; |
eba9ebaa | 800 | struct fw_device *device = target_parent_device(tgt); |
48f18c76 | 801 | struct Scsi_Host *shost; |
5a3c2be6 | 802 | struct scsi_device *sdev; |
7f37c426 | 803 | struct sbp2_login_response response; |
5a3c2be6 | 804 | int generation, node_id, local_node_id; |
7f37c426 | 805 | |
be6f48b0 | 806 | if (fw_device_is_shutdown(device)) |
6ff8147d | 807 | return; |
be6f48b0 | 808 | |
5a8a1bcd | 809 | generation = device->generation; |
621f6dd7 | 810 | smp_rmb(); /* node IDs must not be older than generation */ |
5a8a1bcd SR |
811 | node_id = device->node_id; |
812 | local_node_id = device->card->node_id; | |
7f37c426 | 813 | |
ce896d95 | 814 | /* If this is a re-login attempt, log out, or we might be rejected. */ |
f8436158 | 815 | if (lu->has_sdev) |
ce896d95 SR |
816 | sbp2_send_management_orb(lu, device->node_id, generation, |
817 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
818 | ||
5a3c2be6 SR |
819 | if (sbp2_send_management_orb(lu, node_id, generation, |
820 | SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { | |
2e2705bd | 821 | if (lu->retries++ < 5) { |
285838eb | 822 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
2e2705bd | 823 | } else { |
eba9ebaa SR |
824 | dev_err(tgt_dev(tgt), "failed to login to LUN %04x\n", |
825 | lu->lun); | |
2e2705bd SR |
826 | /* Let any waiting I/O fail from now on. */ |
827 | sbp2_unblock(lu->tgt); | |
828 | } | |
6ff8147d | 829 | return; |
7f37c426 KH |
830 | } |
831 | ||
48f18c76 SR |
832 | tgt->node_id = node_id; |
833 | tgt->address_high = local_node_id << 16; | |
621f6dd7 SR |
834 | smp_wmb(); /* node IDs must not be older than generation */ |
835 | lu->generation = generation; | |
7f37c426 | 836 | |
5a3c2be6 | 837 | lu->command_block_agent_address = |
71ee9f01 SR |
838 | ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff) |
839 | << 32) | be32_to_cpu(response.command_block_agent.low); | |
840 | lu->login_id = be32_to_cpu(response.misc) & 0xffff; | |
7f37c426 | 841 | |
eba9ebaa SR |
842 | dev_notice(tgt_dev(tgt), "logged in to LUN %04x (%d retries)\n", |
843 | lu->lun, lu->retries); | |
7f37c426 | 844 | |
51f9dbef JW |
845 | /* set appropriate retry limit(s) in BUSY_TIMEOUT register */ |
846 | sbp2_set_busy_timeout(lu); | |
7f37c426 | 847 | |
70044d71 | 848 | lu->workfn = sbp2_reconnect; |
5a3c2be6 SR |
849 | sbp2_agent_reset(lu); |
850 | ||
0fa6dfdb | 851 | /* This was a re-login. */ |
f8436158 | 852 | if (lu->has_sdev) { |
0fa6dfdb | 853 | sbp2_cancel_orbs(lu); |
2e2705bd | 854 | sbp2_conditionally_unblock(lu); |
6ff8147d SR |
855 | |
856 | return; | |
0fa6dfdb SR |
857 | } |
858 | ||
9220f194 SR |
859 | if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) |
860 | ssleep(SBP2_INQUIRY_DELAY); | |
861 | ||
48f18c76 | 862 | shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
f8436158 | 863 | sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu); |
e80de370 SR |
864 | /* |
865 | * FIXME: We are unable to perform reconnects while in sbp2_login(). | |
866 | * Therefore __scsi_add_device() will get into trouble if a bus reset | |
867 | * happens in parallel. It will either fail or leave us with an | |
868 | * unusable sdev. As a workaround we check for this and retry the | |
869 | * whole login and SCSI probing. | |
870 | */ | |
1b9c12ba | 871 | |
e80de370 SR |
872 | /* Reported error during __scsi_add_device() */ |
873 | if (IS_ERR(sdev)) | |
874 | goto out_logout_login; | |
875 | ||
e80de370 SR |
876 | /* Unreported error during __scsi_add_device() */ |
877 | smp_rmb(); /* get current card generation */ | |
878 | if (generation != device->card->generation) { | |
879 | scsi_remove_device(sdev); | |
33f1c6c3 | 880 | scsi_device_put(sdev); |
e80de370 | 881 | goto out_logout_login; |
7f37c426 | 882 | } |
e80de370 SR |
883 | |
884 | /* No error during __scsi_add_device() */ | |
f8436158 SR |
885 | lu->has_sdev = true; |
886 | scsi_device_put(sdev); | |
d737d7da | 887 | sbp2_allow_block(tgt); |
6ff8147d SR |
888 | |
889 | return; | |
e80de370 SR |
890 | |
891 | out_logout_login: | |
892 | smp_rmb(); /* generation may have changed */ | |
893 | generation = device->generation; | |
894 | smp_rmb(); /* node_id must not be older than generation */ | |
895 | ||
896 | sbp2_send_management_orb(lu, device->node_id, generation, | |
897 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
898 | /* | |
899 | * If a bus reset happened, sbp2_update will have requeued | |
900 | * lu->work already. Reset the work from reconnect to login. | |
901 | */ | |
70044d71 | 902 | lu->workfn = sbp2_login; |
7f37c426 | 903 | } |
9ba136d0 | 904 | |
b2af07b6 SR |
905 | static void sbp2_reconnect(struct work_struct *work) |
906 | { | |
907 | struct sbp2_logical_unit *lu = | |
908 | container_of(work, struct sbp2_logical_unit, work.work); | |
909 | struct sbp2_target *tgt = lu->tgt; | |
eba9ebaa | 910 | struct fw_device *device = target_parent_device(tgt); |
b2af07b6 SR |
911 | int generation, node_id, local_node_id; |
912 | ||
913 | if (fw_device_is_shutdown(device)) | |
914 | return; | |
915 | ||
916 | generation = device->generation; | |
917 | smp_rmb(); /* node IDs must not be older than generation */ | |
918 | node_id = device->node_id; | |
919 | local_node_id = device->card->node_id; | |
920 | ||
921 | if (sbp2_send_management_orb(lu, node_id, generation, | |
922 | SBP2_RECONNECT_REQUEST, | |
923 | lu->login_id, NULL) < 0) { | |
924 | /* | |
925 | * If reconnect was impossible even though we are in the | |
926 | * current generation, fall back and try to log in again. | |
927 | * | |
928 | * We could check for "Function rejected" status, but | |
929 | * looking at the bus generation as simpler and more general. | |
930 | */ | |
931 | smp_rmb(); /* get current card generation */ | |
932 | if (generation == device->card->generation || | |
933 | lu->retries++ >= 5) { | |
eba9ebaa | 934 | dev_err(tgt_dev(tgt), "failed to reconnect\n"); |
b2af07b6 | 935 | lu->retries = 0; |
70044d71 | 936 | lu->workfn = sbp2_login; |
b2af07b6 SR |
937 | } |
938 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); | |
939 | ||
940 | return; | |
941 | } | |
942 | ||
943 | tgt->node_id = node_id; | |
944 | tgt->address_high = local_node_id << 16; | |
945 | smp_wmb(); /* node IDs must not be older than generation */ | |
946 | lu->generation = generation; | |
947 | ||
eba9ebaa SR |
948 | dev_notice(tgt_dev(tgt), "reconnected to LUN %04x (%d retries)\n", |
949 | lu->lun, lu->retries); | |
b2af07b6 SR |
950 | |
951 | sbp2_agent_reset(lu); | |
952 | sbp2_cancel_orbs(lu); | |
953 | sbp2_conditionally_unblock(lu); | |
954 | } | |
955 | ||
70044d71 TH |
956 | static void sbp2_lu_workfn(struct work_struct *work) |
957 | { | |
958 | struct sbp2_logical_unit *lu = container_of(to_delayed_work(work), | |
959 | struct sbp2_logical_unit, work); | |
960 | lu->workfn(work); | |
961 | } | |
962 | ||
5a3c2be6 | 963 | static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) |
9ba136d0 | 964 | { |
5a3c2be6 | 965 | struct sbp2_logical_unit *lu; |
9ba136d0 | 966 | |
5a3c2be6 SR |
967 | lu = kmalloc(sizeof(*lu), GFP_KERNEL); |
968 | if (!lu) | |
969 | return -ENOMEM; | |
9ba136d0 | 970 | |
5a3c2be6 SR |
971 | lu->address_handler.length = 0x100; |
972 | lu->address_handler.address_callback = sbp2_status_write; | |
973 | lu->address_handler.callback_data = lu; | |
9ba136d0 | 974 | |
5a3c2be6 SR |
975 | if (fw_core_add_address_handler(&lu->address_handler, |
976 | &fw_high_memory_region) < 0) { | |
977 | kfree(lu); | |
978 | return -ENOMEM; | |
979 | } | |
9ba136d0 | 980 | |
f8436158 SR |
981 | lu->tgt = tgt; |
982 | lu->lun = lun_entry & 0xffff; | |
cd1f70fd | 983 | lu->login_id = INVALID_LOGIN_ID; |
f8436158 SR |
984 | lu->retries = 0; |
985 | lu->has_sdev = false; | |
986 | lu->blocked = false; | |
2e2705bd | 987 | ++tgt->dont_block; |
5a3c2be6 | 988 | INIT_LIST_HEAD(&lu->orb_list); |
70044d71 TH |
989 | lu->workfn = sbp2_login; |
990 | INIT_DELAYED_WORK(&lu->work, sbp2_lu_workfn); | |
9ba136d0 | 991 | |
5a3c2be6 SR |
992 | list_add_tail(&lu->link, &tgt->lu_list); |
993 | return 0; | |
994 | } | |
ad85274f | 995 | |
8ff6a757 CB |
996 | static void sbp2_get_unit_unique_id(struct sbp2_target *tgt, |
997 | const u32 *leaf) | |
998 | { | |
999 | if ((leaf[0] & 0xffff0000) == 0x00020000) | |
1000 | tgt->guid = (u64)leaf[1] << 32 | leaf[2]; | |
1001 | } | |
1002 | ||
13b302d0 SR |
1003 | static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, |
1004 | const u32 *directory) | |
5a3c2be6 SR |
1005 | { |
1006 | struct fw_csr_iterator ci; | |
1007 | int key, value; | |
9ba136d0 | 1008 | |
5a3c2be6 SR |
1009 | fw_csr_iterator_init(&ci, directory); |
1010 | while (fw_csr_iterator_next(&ci, &key, &value)) | |
1011 | if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && | |
1012 | sbp2_add_logical_unit(tgt, value) < 0) | |
1013 | return -ENOMEM; | |
1014 | return 0; | |
1015 | } | |
1016 | ||
13b302d0 | 1017 | static int sbp2_scan_unit_dir(struct sbp2_target *tgt, const u32 *directory, |
5a3c2be6 SR |
1018 | u32 *model, u32 *firmware_revision) |
1019 | { | |
1020 | struct fw_csr_iterator ci; | |
1021 | int key, value; | |
1022 | ||
1023 | fw_csr_iterator_init(&ci, directory); | |
9ba136d0 KH |
1024 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
1025 | switch (key) { | |
5a3c2be6 | 1026 | |
9ba136d0 | 1027 | case CSR_DEPENDENT_INFO | CSR_OFFSET: |
5a3c2be6 SR |
1028 | tgt->management_agent_address = |
1029 | CSR_REGISTER_BASE + 4 * value; | |
9ba136d0 | 1030 | break; |
5a3c2be6 SR |
1031 | |
1032 | case CSR_DIRECTORY_ID: | |
1033 | tgt->directory_id = value; | |
9ba136d0 | 1034 | break; |
5a3c2be6 | 1035 | |
9ba136d0 | 1036 | case CSR_MODEL: |
5a3c2be6 SR |
1037 | *model = value; |
1038 | break; | |
1039 | ||
1040 | case SBP2_CSR_FIRMWARE_REVISION: | |
1041 | *firmware_revision = value; | |
1042 | break; | |
1043 | ||
384170da JW |
1044 | case SBP2_CSR_UNIT_CHARACTERISTICS: |
1045 | /* the timeout value is stored in 500ms units */ | |
eaf76e0d | 1046 | tgt->mgt_orb_timeout = (value >> 8 & 0xff) * 500; |
384170da JW |
1047 | break; |
1048 | ||
5a3c2be6 SR |
1049 | case SBP2_CSR_LOGICAL_UNIT_NUMBER: |
1050 | if (sbp2_add_logical_unit(tgt, value) < 0) | |
1051 | return -ENOMEM; | |
1052 | break; | |
1053 | ||
8ff6a757 CB |
1054 | case SBP2_CSR_UNIT_UNIQUE_ID: |
1055 | sbp2_get_unit_unique_id(tgt, ci.p - 1 + value); | |
1056 | break; | |
1057 | ||
5a3c2be6 | 1058 | case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: |
0e3e2eab RS |
1059 | /* Adjust for the increment in the iterator */ |
1060 | if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0) | |
5a3c2be6 | 1061 | return -ENOMEM; |
9ba136d0 KH |
1062 | break; |
1063 | } | |
1064 | } | |
5a3c2be6 SR |
1065 | return 0; |
1066 | } | |
1067 | ||
eaf76e0d SR |
1068 | /* |
1069 | * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be | |
1070 | * provided in the config rom. Most devices do provide a value, which | |
1071 | * we'll use for login management orbs, but with some sane limits. | |
1072 | */ | |
1073 | static void sbp2_clamp_management_orb_timeout(struct sbp2_target *tgt) | |
1074 | { | |
1075 | unsigned int timeout = tgt->mgt_orb_timeout; | |
1076 | ||
1077 | if (timeout > 40000) | |
eba9ebaa SR |
1078 | dev_notice(tgt_dev(tgt), "%ds mgt_ORB_timeout limited to 40s\n", |
1079 | timeout / 1000); | |
eaf76e0d SR |
1080 | |
1081 | tgt->mgt_orb_timeout = clamp_val(timeout, 5000, 40000); | |
1082 | } | |
1083 | ||
5a3c2be6 SR |
1084 | static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, |
1085 | u32 firmware_revision) | |
1086 | { | |
1087 | int i; | |
05cca738 | 1088 | unsigned int w = sbp2_param_workarounds; |
2df222b8 SR |
1089 | |
1090 | if (w) | |
eba9ebaa SR |
1091 | dev_notice(tgt_dev(tgt), |
1092 | "Please notify linux1394-devel@lists.sf.net " | |
1093 | "if you need the workarounds parameter\n"); | |
5a3c2be6 | 1094 | |
2df222b8 SR |
1095 | if (w & SBP2_WORKAROUND_OVERRIDE) |
1096 | goto out; | |
9ba136d0 KH |
1097 | |
1098 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
5a3c2be6 | 1099 | |
9ba136d0 KH |
1100 | if (sbp2_workarounds_table[i].firmware_revision != |
1101 | (firmware_revision & 0xffffff00)) | |
1102 | continue; | |
5a3c2be6 | 1103 | |
9ba136d0 | 1104 | if (sbp2_workarounds_table[i].model != model && |
f746072a | 1105 | sbp2_workarounds_table[i].model != SBP2_ROM_VALUE_WILDCARD) |
9ba136d0 | 1106 | continue; |
5a3c2be6 | 1107 | |
2df222b8 | 1108 | w |= sbp2_workarounds_table[i].workarounds; |
9ba136d0 KH |
1109 | break; |
1110 | } | |
2df222b8 SR |
1111 | out: |
1112 | if (w) | |
eba9ebaa SR |
1113 | dev_notice(tgt_dev(tgt), "workarounds 0x%x " |
1114 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", | |
1115 | w, firmware_revision, model); | |
2df222b8 | 1116 | tgt->workarounds = w; |
5a3c2be6 SR |
1117 | } |
1118 | ||
1119 | static struct scsi_host_template scsi_driver_template; | |
94a87157 | 1120 | static void sbp2_remove(struct fw_unit *unit); |
5a3c2be6 | 1121 | |
94a87157 | 1122 | static int sbp2_probe(struct fw_unit *unit, const struct ieee1394_device_id *id) |
5a3c2be6 | 1123 | { |
e5110d01 | 1124 | struct fw_device *device = fw_parent_device(unit); |
5a3c2be6 SR |
1125 | struct sbp2_target *tgt; |
1126 | struct sbp2_logical_unit *lu; | |
1127 | struct Scsi_Host *shost; | |
1128 | u32 model, firmware_revision; | |
1129 | ||
74044563 CB |
1130 | /* cannot (or should not) handle targets on the local node */ |
1131 | if (device->is_local) | |
1132 | return -ENODEV; | |
1133 | ||
5a3c2be6 SR |
1134 | shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); |
1135 | if (shost == NULL) | |
1136 | return -ENOMEM; | |
1137 | ||
1138 | tgt = (struct sbp2_target *)shost->hostdata; | |
d961450d | 1139 | dev_set_drvdata(&unit->device, tgt); |
5a3c2be6 | 1140 | tgt->unit = unit; |
5a3c2be6 | 1141 | INIT_LIST_HEAD(&tgt->lu_list); |
d737d7da | 1142 | spin_lock_init(&tgt->lock); |
c9755e14 | 1143 | tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; |
5a3c2be6 SR |
1144 | |
1145 | if (fw_device_enable_phys_dma(device) < 0) | |
1146 | goto fail_shost_put; | |
1147 | ||
af271941 SR |
1148 | shost->max_cmd_len = SBP2_MAX_CDB_SIZE; |
1149 | ||
473ffe65 CL |
1150 | if (scsi_add_host_with_dma(shost, &unit->device, |
1151 | device->card->device) < 0) | |
5a3c2be6 SR |
1152 | goto fail_shost_put; |
1153 | ||
5a3c2be6 SR |
1154 | /* implicit directory ID */ |
1155 | tgt->directory_id = ((unit->directory - device->config_rom) * 4 | |
1156 | + CSR_CONFIG_ROM) & 0xffffff; | |
1157 | ||
f746072a SR |
1158 | firmware_revision = SBP2_ROM_VALUE_MISSING; |
1159 | model = SBP2_ROM_VALUE_MISSING; | |
1160 | ||
5a3c2be6 SR |
1161 | if (sbp2_scan_unit_dir(tgt, unit->directory, &model, |
1162 | &firmware_revision) < 0) | |
32ce38f4 | 1163 | goto fail_remove; |
5a3c2be6 | 1164 | |
eaf76e0d | 1165 | sbp2_clamp_management_orb_timeout(tgt); |
5a3c2be6 | 1166 | sbp2_init_workarounds(tgt, model, firmware_revision); |
9ba136d0 | 1167 | |
a08e100a SR |
1168 | /* |
1169 | * At S100 we can do 512 bytes per packet, at S200 1024 bytes, | |
1170 | * and so on up to 4096 bytes. The SBP-2 max_payload field | |
1171 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
1172 | * if we set this to max_speed + 7, we get the right value. | |
1173 | */ | |
4ec4a67a SR |
1174 | tgt->max_payload = min3(device->max_speed + 7, 10U, |
1175 | device->card->max_receive - 1); | |
a08e100a | 1176 | |
285838eb | 1177 | /* Do the login in a workqueue so we can easily reschedule retries. */ |
5a3c2be6 | 1178 | list_for_each_entry(lu, &tgt->lu_list, link) |
0dcfeb7e | 1179 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
6ff8147d | 1180 | |
9ba136d0 | 1181 | return 0; |
ad85274f | 1182 | |
32ce38f4 | 1183 | fail_remove: |
94a87157 | 1184 | sbp2_remove(unit); |
5a3c2be6 SR |
1185 | return -ENOMEM; |
1186 | ||
1187 | fail_shost_put: | |
1188 | scsi_host_put(shost); | |
1189 | return -ENOMEM; | |
9ba136d0 KH |
1190 | } |
1191 | ||
b2af07b6 | 1192 | static void sbp2_update(struct fw_unit *unit) |
9ba136d0 | 1193 | { |
d961450d | 1194 | struct sbp2_target *tgt = dev_get_drvdata(&unit->device); |
0278ccd9 CB |
1195 | struct sbp2_logical_unit *lu; |
1196 | ||
b2af07b6 | 1197 | fw_device_enable_phys_dma(fw_parent_device(unit)); |
6ff8147d | 1198 | |
b2af07b6 SR |
1199 | /* |
1200 | * Fw-core serializes sbp2_update() against sbp2_remove(). | |
1201 | * Iteration over tgt->lu_list is therefore safe here. | |
1202 | */ | |
1203 | list_for_each_entry(lu, &tgt->lu_list, link) { | |
1204 | sbp2_conditionally_block(lu); | |
1205 | lu->retries = 0; | |
1206 | sbp2_queue_work(lu, 0); | |
1207 | } | |
9ba136d0 KH |
1208 | } |
1209 | ||
94a87157 | 1210 | static void sbp2_remove(struct fw_unit *unit) |
9ba136d0 | 1211 | { |
32ce38f4 SR |
1212 | struct fw_device *device = fw_parent_device(unit); |
1213 | struct sbp2_target *tgt = dev_get_drvdata(&unit->device); | |
b2af07b6 SR |
1214 | struct sbp2_logical_unit *lu, *next; |
1215 | struct Scsi_Host *shost = | |
1216 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
1217 | struct scsi_device *sdev; | |
be6f48b0 | 1218 | |
b2af07b6 SR |
1219 | /* prevent deadlocks */ |
1220 | sbp2_unblock(tgt); | |
9ba136d0 | 1221 | |
b2af07b6 | 1222 | list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { |
32ce38f4 | 1223 | cancel_delayed_work_sync(&lu->work); |
b2af07b6 SR |
1224 | sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun)); |
1225 | if (sdev) { | |
1226 | scsi_remove_device(sdev); | |
1227 | scsi_device_put(sdev); | |
7f37c426 | 1228 | } |
b2af07b6 SR |
1229 | if (lu->login_id != INVALID_LOGIN_ID) { |
1230 | int generation, node_id; | |
1231 | /* | |
1232 | * tgt->node_id may be obsolete here if we failed | |
1233 | * during initial login or after a bus reset where | |
1234 | * the topology changed. | |
1235 | */ | |
1236 | generation = device->generation; | |
1237 | smp_rmb(); /* node_id vs. generation */ | |
1238 | node_id = device->node_id; | |
1239 | sbp2_send_management_orb(lu, node_id, generation, | |
1240 | SBP2_LOGOUT_REQUEST, | |
1241 | lu->login_id, NULL); | |
1242 | } | |
1243 | fw_core_remove_address_handler(&lu->address_handler); | |
1244 | list_del(&lu->link); | |
1245 | kfree(lu); | |
7f37c426 | 1246 | } |
b2af07b6 | 1247 | scsi_remove_host(shost); |
94a87157 | 1248 | dev_notice(&unit->device, "released target %d:0:0\n", shost->host_no); |
9ba136d0 | 1249 | |
b2af07b6 | 1250 | scsi_host_put(shost); |
9ba136d0 KH |
1251 | } |
1252 | ||
1253 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
1254 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
1255 | ||
b3b29888 | 1256 | static const struct ieee1394_device_id sbp2_id_table[] = { |
9ba136d0 | 1257 | { |
b3b29888 SR |
1258 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | |
1259 | IEEE1394_MATCH_VERSION, | |
9ba136d0 | 1260 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, |
5af4e5ea | 1261 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
1262 | }, |
1263 | { } | |
1264 | }; | |
1265 | ||
1266 | static struct fw_driver sbp2_driver = { | |
1267 | .driver = { | |
1268 | .owner = THIS_MODULE, | |
0c22ecde | 1269 | .name = KBUILD_MODNAME, |
9ba136d0 | 1270 | .bus = &fw_bus_type, |
9ba136d0 | 1271 | }, |
94a87157 | 1272 | .probe = sbp2_probe, |
9ba136d0 | 1273 | .update = sbp2_update, |
94a87157 | 1274 | .remove = sbp2_remove, |
9ba136d0 KH |
1275 | .id_table = sbp2_id_table, |
1276 | }; | |
1277 | ||
5e212567 SR |
1278 | static void sbp2_unmap_scatterlist(struct device *card_device, |
1279 | struct sbp2_command_orb *orb) | |
1280 | { | |
f2030223 | 1281 | scsi_dma_unmap(orb->cmd); |
5e212567 SR |
1282 | |
1283 | if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT)) | |
1284 | dma_unmap_single(card_device, orb->page_table_bus, | |
1285 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
1286 | } | |
1287 | ||
53dca511 | 1288 | static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) |
9ba136d0 | 1289 | { |
fbb5423c | 1290 | int sam_status; |
6503de65 | 1291 | int sfmt = (sbp2_status[0] >> 6) & 0x03; |
fbb5423c | 1292 | |
6503de65 CB |
1293 | if (sfmt == 2 || sfmt == 3) { |
1294 | /* | |
1295 | * Reserved for future standardization (2) or | |
1296 | * Status block format vendor-dependent (3) | |
1297 | */ | |
1298 | return DID_ERROR << 16; | |
1299 | } | |
fbb5423c | 1300 | |
6503de65 | 1301 | sense_data[0] = 0x70 | sfmt | (sbp2_status[1] & 0x80); |
9ba136d0 | 1302 | sense_data[1] = 0x0; |
6503de65 | 1303 | sense_data[2] = ((sbp2_status[1] << 1) & 0xe0) | (sbp2_status[1] & 0x0f); |
9ba136d0 KH |
1304 | sense_data[3] = sbp2_status[4]; |
1305 | sense_data[4] = sbp2_status[5]; | |
1306 | sense_data[5] = sbp2_status[6]; | |
1307 | sense_data[6] = sbp2_status[7]; | |
1308 | sense_data[7] = 10; | |
1309 | sense_data[8] = sbp2_status[8]; | |
1310 | sense_data[9] = sbp2_status[9]; | |
1311 | sense_data[10] = sbp2_status[10]; | |
1312 | sense_data[11] = sbp2_status[11]; | |
1313 | sense_data[12] = sbp2_status[2]; | |
1314 | sense_data[13] = sbp2_status[3]; | |
1315 | sense_data[14] = sbp2_status[12]; | |
1316 | sense_data[15] = sbp2_status[13]; | |
1317 | ||
fbb5423c | 1318 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 1319 | |
fbb5423c KH |
1320 | switch (sam_status) { |
1321 | case SAM_STAT_GOOD: | |
9ba136d0 | 1322 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 1323 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 1324 | case SAM_STAT_BUSY: |
9ba136d0 KH |
1325 | case SAM_STAT_RESERVATION_CONFLICT: |
1326 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
1327 | return DID_OK << 16 | sam_status; |
1328 | ||
9ba136d0 | 1329 | default: |
fbb5423c | 1330 | return DID_ERROR << 16; |
9ba136d0 KH |
1331 | } |
1332 | } | |
1333 | ||
53dca511 SR |
1334 | static void complete_command_orb(struct sbp2_orb *base_orb, |
1335 | struct sbp2_status *status) | |
9ba136d0 | 1336 | { |
6f061487 JF |
1337 | struct sbp2_command_orb *orb = |
1338 | container_of(base_orb, struct sbp2_command_orb, base); | |
d737d7da | 1339 | struct fw_device *device = target_parent_device(base_orb->lu->tgt); |
9ba136d0 KH |
1340 | int result; |
1341 | ||
1342 | if (status != NULL) { | |
a77754a7 | 1343 | if (STATUS_GET_DEAD(*status)) |
d737d7da | 1344 | sbp2_agent_reset_no_wait(base_orb->lu); |
9ba136d0 | 1345 | |
a77754a7 | 1346 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 1347 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 1348 | result = DID_OK << 16; |
9ba136d0 KH |
1349 | break; |
1350 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 1351 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
1352 | break; |
1353 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
1354 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
1355 | default: | |
fbb5423c | 1356 | result = DID_ERROR << 16; |
9ba136d0 KH |
1357 | break; |
1358 | } | |
1359 | ||
a77754a7 KH |
1360 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
1361 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
1362 | orb->cmd->sense_buffer); |
1363 | } else { | |
c781c06d KH |
1364 | /* |
1365 | * If the orb completes with status == NULL, something | |
9ba136d0 | 1366 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
1367 | * or when sending the write (less likely). |
1368 | */ | |
fbb5423c | 1369 | result = DID_BUS_BUSY << 16; |
d737d7da | 1370 | sbp2_conditionally_block(base_orb->lu); |
9ba136d0 KH |
1371 | } |
1372 | ||
1373 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 1374 | sizeof(orb->request), DMA_TO_DEVICE); |
5e212567 | 1375 | sbp2_unmap_scatterlist(device->card->device, orb); |
9ba136d0 | 1376 | |
fbb5423c | 1377 | orb->cmd->result = result; |
b75ca5ea | 1378 | orb->cmd->scsi_done(orb->cmd); |
9ba136d0 KH |
1379 | } |
1380 | ||
53dca511 SR |
1381 | static int sbp2_map_scatterlist(struct sbp2_command_orb *orb, |
1382 | struct fw_device *device, struct sbp2_logical_unit *lu) | |
9ba136d0 | 1383 | { |
09b12dd4 SR |
1384 | struct scatterlist *sg = scsi_sglist(orb->cmd); |
1385 | int i, n; | |
1386 | ||
f2030223 CL |
1387 | n = scsi_dma_map(orb->cmd); |
1388 | if (n <= 0) | |
95ffc5e3 | 1389 | goto fail; |
9ba136d0 | 1390 | |
c781c06d KH |
1391 | /* |
1392 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
1393 | * the scatter list by converting it to an immediate block |
1394 | * request. This is also a workaround for broken devices such | |
1395 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
1396 | * tables. |
1397 | */ | |
09b12dd4 | 1398 | if (n == 1) { |
71ee9f01 SR |
1399 | orb->request.data_descriptor.high = |
1400 | cpu_to_be32(lu->tgt->address_high); | |
1401 | orb->request.data_descriptor.low = | |
1402 | cpu_to_be32(sg_dma_address(sg)); | |
1403 | orb->request.misc |= | |
1404 | cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg))); | |
95ffc5e3 | 1405 | return 0; |
9ba136d0 KH |
1406 | } |
1407 | ||
09b12dd4 SR |
1408 | for_each_sg(sg, sg, n, i) { |
1409 | orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16); | |
1410 | orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg)); | |
9ba136d0 KH |
1411 | } |
1412 | ||
b4be016a SR |
1413 | orb->page_table_bus = |
1414 | dma_map_single(device->card->device, orb->page_table, | |
1415 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
8d8bb39b | 1416 | if (dma_mapping_error(device->card->device, orb->page_table_bus)) |
b4be016a | 1417 | goto fail_page_table; |
9ba136d0 | 1418 | |
c781c06d KH |
1419 | /* |
1420 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
1421 | * to fill in the node ID part of the address. All other |
1422 | * pointers assume that the data referenced reside on the | |
1423 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
1424 | * on other nodes so we need to put our ID in descriptor.high. |
1425 | */ | |
71ee9f01 SR |
1426 | orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high); |
1427 | orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus); | |
1428 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT | | |
09b12dd4 | 1429 | COMMAND_ORB_DATA_SIZE(n)); |
9ba136d0 | 1430 | |
95ffc5e3 KH |
1431 | return 0; |
1432 | ||
1433 | fail_page_table: | |
f2030223 | 1434 | scsi_dma_unmap(orb->cmd); |
95ffc5e3 KH |
1435 | fail: |
1436 | return -ENOMEM; | |
9ba136d0 KH |
1437 | } |
1438 | ||
9ba136d0 KH |
1439 | /* SCSI stack integration */ |
1440 | ||
b75ca5ea SR |
1441 | static int sbp2_scsi_queuecommand(struct Scsi_Host *shost, |
1442 | struct scsi_cmnd *cmd) | |
9ba136d0 | 1443 | { |
5a3c2be6 | 1444 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
eba9ebaa | 1445 | struct fw_device *device = target_parent_device(lu->tgt); |
9ba136d0 | 1446 | struct sbp2_command_orb *orb; |
4bbc1bdd | 1447 | int generation, retval = SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1448 | |
2d826cc5 | 1449 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
cfb0c9d1 | 1450 | if (orb == NULL) |
5a3c2be6 | 1451 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1452 | |
12f26aa1 KH |
1453 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
1454 | orb->base.rcode = -1; | |
e57d2011 | 1455 | kref_init(&orb->base.kref); |
b75ca5ea | 1456 | orb->cmd = cmd; |
a08e100a | 1457 | orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL); |
71ee9f01 | 1458 | orb->request.misc = cpu_to_be32( |
a08e100a | 1459 | COMMAND_ORB_MAX_PAYLOAD(lu->tgt->max_payload) | |
f1397490 | 1460 | COMMAND_ORB_SPEED(device->max_speed) | |
71ee9f01 | 1461 | COMMAND_ORB_NOTIFY); |
9ba136d0 KH |
1462 | |
1463 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
0d7dcbf2 | 1464 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION); |
9ba136d0 | 1465 | |
4bbc1bdd SR |
1466 | generation = device->generation; |
1467 | smp_rmb(); /* sbp2_map_scatterlist looks at tgt->address_high */ | |
1468 | ||
5a3c2be6 SR |
1469 | if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) |
1470 | goto out; | |
9ba136d0 | 1471 | |
64a87b24 | 1472 | memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len); |
9ba136d0 KH |
1473 | |
1474 | orb->base.callback = complete_command_orb; | |
8526392a SR |
1475 | orb->base.request_bus = |
1476 | dma_map_single(device->card->device, &orb->request, | |
1477 | sizeof(orb->request), DMA_TO_DEVICE); | |
5e212567 SR |
1478 | if (dma_mapping_error(device->card->device, orb->base.request_bus)) { |
1479 | sbp2_unmap_scatterlist(device->card->device, orb); | |
5a3c2be6 | 1480 | goto out; |
5e212567 | 1481 | } |
82eff9db | 1482 | |
4bbc1bdd | 1483 | sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation, |
5a3c2be6 SR |
1484 | lu->command_block_agent_address + SBP2_ORB_POINTER); |
1485 | retval = 0; | |
1486 | out: | |
e57d2011 | 1487 | kref_put(&orb->base.kref, free_orb); |
5a3c2be6 | 1488 | return retval; |
9ba136d0 KH |
1489 | } |
1490 | ||
cfb01381 SR |
1491 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1492 | { | |
5a3c2be6 | 1493 | struct sbp2_logical_unit *lu = sdev->hostdata; |
cfb01381 | 1494 | |
5513c5f6 SR |
1495 | /* (Re-)Adding logical units via the SCSI stack is not supported. */ |
1496 | if (!lu) | |
1497 | return -ENOSYS; | |
1498 | ||
cfb01381 SR |
1499 | sdev->allow_restart = 1; |
1500 | ||
26c72e22 CL |
1501 | /* |
1502 | * SBP-2 does not require any alignment, but we set it anyway | |
1503 | * for compatibility with earlier versions of this driver. | |
1504 | */ | |
8ac3a47c | 1505 | blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1); |
465ff318 | 1506 | |
5a3c2be6 | 1507 | if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
cfb01381 | 1508 | sdev->inquiry_len = 36; |
5a3c2be6 | 1509 | |
cfb01381 SR |
1510 | return 0; |
1511 | } | |
1512 | ||
9ba136d0 KH |
1513 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1514 | { | |
5a3c2be6 | 1515 | struct sbp2_logical_unit *lu = sdev->hostdata; |
9ba136d0 | 1516 | |
cfb01381 SR |
1517 | sdev->use_10_for_rw = 1; |
1518 | ||
2635f96f SR |
1519 | if (sbp2_param_exclusive_login) |
1520 | sdev->manage_start_stop = 1; | |
1521 | ||
cfb01381 SR |
1522 | if (sdev->type == TYPE_ROM) |
1523 | sdev->use_10_for_ms = 1; | |
5a3c2be6 | 1524 | |
9ba136d0 | 1525 | if (sdev->type == TYPE_DISK && |
5a3c2be6 | 1526 | lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
9ba136d0 | 1527 | sdev->skip_ms_page_8 = 1; |
5a3c2be6 SR |
1528 | |
1529 | if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) | |
9ba136d0 | 1530 | sdev->fix_capacity = 1; |
5a3c2be6 | 1531 | |
ffcaade3 SR |
1532 | if (lu->tgt->workarounds & SBP2_WORKAROUND_POWER_CONDITION) |
1533 | sdev->start_stop_pwr_cond = 1; | |
1534 | ||
5a3c2be6 | 1535 | if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
086fa5ff | 1536 | blk_queue_max_hw_sectors(sdev->request_queue, 128 * 1024 / 512); |
5a3c2be6 | 1537 | |
9ba136d0 KH |
1538 | return 0; |
1539 | } | |
1540 | ||
1541 | /* | |
1542 | * Called by scsi stack when something has really gone wrong. Usually | |
1543 | * called when a command has timed-out for some reason. | |
1544 | */ | |
1545 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1546 | { | |
5a3c2be6 | 1547 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
9ba136d0 | 1548 | |
eba9ebaa | 1549 | dev_notice(lu_dev(lu), "sbp2_scsi_abort\n"); |
5a3c2be6 SR |
1550 | sbp2_agent_reset(lu); |
1551 | sbp2_cancel_orbs(lu); | |
9ba136d0 KH |
1552 | |
1553 | return SUCCESS; | |
1554 | } | |
1555 | ||
14e21986 SR |
1556 | /* |
1557 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: | |
1558 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) | |
1559 | * | |
1560 | * This is the concatenation of target port identifier and logical unit | |
1561 | * identifier as per SAM-2...SAM-4 annex A. | |
1562 | */ | |
53dca511 SR |
1563 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
1564 | struct device_attribute *attr, char *buf) | |
14e21986 SR |
1565 | { |
1566 | struct scsi_device *sdev = to_scsi_device(dev); | |
5a3c2be6 | 1567 | struct sbp2_logical_unit *lu; |
14e21986 SR |
1568 | |
1569 | if (!sdev) | |
1570 | return 0; | |
14e21986 | 1571 | |
5a3c2be6 | 1572 | lu = sdev->hostdata; |
14e21986 | 1573 | |
c9755e14 SR |
1574 | return sprintf(buf, "%016llx:%06x:%04x\n", |
1575 | (unsigned long long)lu->tgt->guid, | |
5a3c2be6 | 1576 | lu->tgt->directory_id, lu->lun); |
14e21986 SR |
1577 | } |
1578 | ||
1579 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
1580 | ||
1581 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { | |
1582 | &dev_attr_ieee1394_id, | |
1583 | NULL | |
1584 | }; | |
1585 | ||
9ba136d0 KH |
1586 | static struct scsi_host_template scsi_driver_template = { |
1587 | .module = THIS_MODULE, | |
1588 | .name = "SBP-2 IEEE-1394", | |
0c22ecde | 1589 | .proc_name = "sbp2", |
9ba136d0 | 1590 | .queuecommand = sbp2_scsi_queuecommand, |
cfb01381 | 1591 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1592 | .slave_configure = sbp2_scsi_slave_configure, |
1593 | .eh_abort_handler = sbp2_scsi_abort, | |
1594 | .this_id = -1, | |
1595 | .sg_tablesize = SG_ALL, | |
a8cf59a6 | 1596 | .max_segment_size = SBP2_MAX_SEG_SIZE, |
02af8e70 | 1597 | .can_queue = 1, |
14e21986 | 1598 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
9ba136d0 KH |
1599 | }; |
1600 | ||
9ba136d0 KH |
1601 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1602 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1603 | MODULE_LICENSE("GPL"); | |
1604 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1605 | ||
1e4c7b0d | 1606 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1e4c7b0d | 1607 | MODULE_ALIAS("sbp2"); |
1e4c7b0d | 1608 | |
9ba136d0 KH |
1609 | static int __init sbp2_init(void) |
1610 | { | |
1611 | return driver_register(&sbp2_driver.driver); | |
1612 | } | |
1613 | ||
1614 | static void __exit sbp2_cleanup(void) | |
1615 | { | |
1616 | driver_unregister(&sbp2_driver.driver); | |
1617 | } | |
1618 | ||
1619 | module_init(sbp2_init); | |
1620 | module_exit(sbp2_cleanup); |