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Commit | Line | Data |
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c781c06d KH |
1 | /* |
2 | * SBP2 driver (SCSI over IEEE1394) | |
9ba136d0 | 3 | * |
27a15e50 | 4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
9ba136d0 KH |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
c781c06d KH |
21 | /* |
22 | * The basic structure of this driver is based on the old storage driver, | |
27a15e50 KH |
23 | * drivers/ieee1394/sbp2.c, originally written by |
24 | * James Goodwin <jamesg@filanet.com> | |
25 | * with later contributions and ongoing maintenance from | |
26 | * Ben Collins <bcollins@debian.org>, | |
27 | * Stefan Richter <stefanr@s5r6.in-berlin.de> | |
28 | * and many others. | |
29 | */ | |
30 | ||
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 SR |
176 | |
177 | int dont_block; /* counter for each logical unit */ | |
178 | int blocked; /* ditto */ | |
5a3c2be6 SR |
179 | }; |
180 | ||
eba9ebaa | 181 | static struct fw_device *target_parent_device(struct sbp2_target *tgt) |
e5110d01 SR |
182 | { |
183 | return fw_parent_device(tgt->unit); | |
184 | } | |
185 | ||
eba9ebaa SR |
186 | static const struct device *tgt_dev(const struct sbp2_target *tgt) |
187 | { | |
188 | return &tgt->unit->device; | |
189 | } | |
190 | ||
191 | static const struct device *lu_dev(const struct sbp2_logical_unit *lu) | |
192 | { | |
193 | return &lu->tgt->unit->device; | |
194 | } | |
195 | ||
cd1f70fd JF |
196 | /* Impossible login_id, to detect logout attempt before successful login */ |
197 | #define INVALID_LOGIN_ID 0x10000 | |
198 | ||
eaf76e0d | 199 | #define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */ |
9ba136d0 | 200 | #define SBP2_ORB_NULL 0x80000000 |
17cff9ff JW |
201 | #define SBP2_RETRY_LIMIT 0xf /* 15 retries */ |
202 | #define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */ | |
9ba136d0 | 203 | |
af271941 SR |
204 | /* |
205 | * There is no transport protocol limit to the CDB length, but we implement | |
206 | * a fixed length only. 16 bytes is enough for disks larger than 2 TB. | |
207 | */ | |
208 | #define SBP2_MAX_CDB_SIZE 16 | |
209 | ||
09b12dd4 | 210 | /* |
26c72e22 CL |
211 | * The maximum SBP-2 data buffer size is 0xffff. We quadlet-align this |
212 | * for compatibility with earlier versions of this driver. | |
09b12dd4 SR |
213 | */ |
214 | #define SBP2_MAX_SEG_SIZE 0xfffc | |
215 | ||
9ba136d0 | 216 | /* Unit directory keys */ |
384170da | 217 | #define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a |
5a3c2be6 SR |
218 | #define SBP2_CSR_FIRMWARE_REVISION 0x3c |
219 | #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 | |
8ff6a757 | 220 | #define SBP2_CSR_UNIT_UNIQUE_ID 0x8d |
5a3c2be6 | 221 | #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 |
9ba136d0 | 222 | |
9ba136d0 KH |
223 | /* Management orb opcodes */ |
224 | #define SBP2_LOGIN_REQUEST 0x0 | |
225 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
226 | #define SBP2_RECONNECT_REQUEST 0x3 | |
227 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
228 | #define SBP2_LOGOUT_REQUEST 0x7 | |
229 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
230 | #define SBP2_ABORT_TASK_SET 0xc | |
231 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
232 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
233 | ||
234 | /* Offsets for command block agent registers */ | |
235 | #define SBP2_AGENT_STATE 0x00 | |
236 | #define SBP2_AGENT_RESET 0x04 | |
237 | #define SBP2_ORB_POINTER 0x08 | |
238 | #define SBP2_DOORBELL 0x10 | |
239 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
240 | ||
241 | /* Status write response codes */ | |
242 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
243 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
244 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
245 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
246 | ||
a77754a7 KH |
247 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
248 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) | |
249 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) | |
250 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) | |
251 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) | |
252 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) | |
253 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) | |
254 | #define STATUS_GET_DATA(v) ((v).data) | |
9ba136d0 KH |
255 | |
256 | struct sbp2_status { | |
257 | u32 status; | |
258 | u32 orb_low; | |
259 | u8 data[24]; | |
260 | }; | |
261 | ||
262 | struct sbp2_pointer { | |
71ee9f01 SR |
263 | __be32 high; |
264 | __be32 low; | |
9ba136d0 KH |
265 | }; |
266 | ||
267 | struct sbp2_orb { | |
268 | struct fw_transaction t; | |
e57d2011 | 269 | struct kref kref; |
9ba136d0 KH |
270 | dma_addr_t request_bus; |
271 | int rcode; | |
a98e2719 | 272 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
9ba136d0 KH |
273 | struct list_head link; |
274 | }; | |
275 | ||
a77754a7 KH |
276 | #define MANAGEMENT_ORB_LUN(v) ((v)) |
277 | #define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16) | |
278 | #define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20) | |
5cd54c94 | 279 | #define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0) |
a77754a7 KH |
280 | #define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29) |
281 | #define MANAGEMENT_ORB_NOTIFY ((1) << 31) | |
9ba136d0 | 282 | |
a77754a7 KH |
283 | #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) |
284 | #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) | |
9ba136d0 KH |
285 | |
286 | struct sbp2_management_orb { | |
287 | struct sbp2_orb base; | |
288 | struct { | |
289 | struct sbp2_pointer password; | |
290 | struct sbp2_pointer response; | |
71ee9f01 SR |
291 | __be32 misc; |
292 | __be32 length; | |
9ba136d0 KH |
293 | struct sbp2_pointer status_fifo; |
294 | } request; | |
295 | __be32 response[4]; | |
296 | dma_addr_t response_bus; | |
297 | struct completion done; | |
298 | struct sbp2_status status; | |
299 | }; | |
300 | ||
9ba136d0 | 301 | struct sbp2_login_response { |
71ee9f01 | 302 | __be32 misc; |
9ba136d0 | 303 | struct sbp2_pointer command_block_agent; |
71ee9f01 | 304 | __be32 reconnect_hold; |
9ba136d0 | 305 | }; |
a77754a7 KH |
306 | #define COMMAND_ORB_DATA_SIZE(v) ((v)) |
307 | #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) | |
308 | #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) | |
309 | #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) | |
310 | #define COMMAND_ORB_SPEED(v) ((v) << 24) | |
0d7dcbf2 | 311 | #define COMMAND_ORB_DIRECTION ((1) << 27) |
a77754a7 KH |
312 | #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) |
313 | #define COMMAND_ORB_NOTIFY ((1) << 31) | |
9ba136d0 KH |
314 | |
315 | struct sbp2_command_orb { | |
316 | struct sbp2_orb base; | |
317 | struct { | |
318 | struct sbp2_pointer next; | |
319 | struct sbp2_pointer data_descriptor; | |
71ee9f01 | 320 | __be32 misc; |
af271941 | 321 | u8 command_block[SBP2_MAX_CDB_SIZE]; |
9ba136d0 KH |
322 | } request; |
323 | struct scsi_cmnd *cmd; | |
5a3c2be6 | 324 | struct sbp2_logical_unit *lu; |
9ba136d0 | 325 | |
9fb2dd12 | 326 | struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); |
9ba136d0 | 327 | dma_addr_t page_table_bus; |
9ba136d0 KH |
328 | }; |
329 | ||
f746072a SR |
330 | #define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */ |
331 | #define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */ | |
332 | ||
9ba136d0 KH |
333 | /* |
334 | * List of devices with known bugs. | |
335 | * | |
336 | * The firmware_revision field, masked with 0xffff00, is the best | |
337 | * indicator for the type of bridge chip of a device. It yields a few | |
338 | * false positives but this did not break correctly behaving devices | |
f746072a | 339 | * so far. |
9ba136d0 KH |
340 | */ |
341 | static const struct { | |
342 | u32 firmware_revision; | |
343 | u32 model; | |
05cca738 | 344 | unsigned int workarounds; |
9ba136d0 KH |
345 | } sbp2_workarounds_table[] = { |
346 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
347 | .firmware_revision = 0x002800, | |
348 | .model = 0x001010, | |
349 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
ffcaade3 SR |
350 | SBP2_WORKAROUND_MODE_SENSE_8 | |
351 | SBP2_WORKAROUND_POWER_CONDITION, | |
9ba136d0 | 352 | }, |
9220f194 SR |
353 | /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { |
354 | .firmware_revision = 0x002800, | |
355 | .model = 0x000000, | |
3c5f8035 | 356 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
9220f194 | 357 | }, |
9ba136d0 KH |
358 | /* Initio bridges, actually only needed for some older ones */ { |
359 | .firmware_revision = 0x000200, | |
f746072a | 360 | .model = SBP2_ROM_VALUE_WILDCARD, |
9ba136d0 KH |
361 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
362 | }, | |
ffcaade3 SR |
363 | /* PL-3507 bridge with Prolific firmware */ { |
364 | .firmware_revision = 0x012800, | |
f746072a | 365 | .model = SBP2_ROM_VALUE_WILDCARD, |
ffcaade3 SR |
366 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
367 | }, | |
9ba136d0 KH |
368 | /* Symbios bridge */ { |
369 | .firmware_revision = 0xa0b800, | |
f746072a | 370 | .model = SBP2_ROM_VALUE_WILDCARD, |
9ba136d0 KH |
371 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
372 | }, | |
2aa9ff7f SR |
373 | /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ { |
374 | .firmware_revision = 0x002600, | |
f746072a | 375 | .model = SBP2_ROM_VALUE_WILDCARD, |
2aa9ff7f SR |
376 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
377 | }, | |
c781c06d | 378 | /* |
c8c4707c SR |
379 | * iPod 2nd generation: needs 128k max transfer size workaround |
380 | * iPod 3rd generation: needs fix capacity workaround | |
c781c06d | 381 | */ |
c8c4707c SR |
382 | { |
383 | .firmware_revision = 0x0a2700, | |
384 | .model = 0x000000, | |
385 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS | | |
386 | SBP2_WORKAROUND_FIX_CAPACITY, | |
387 | }, | |
388 | /* iPod 4th generation */ { | |
9ba136d0 KH |
389 | .firmware_revision = 0x0a2700, |
390 | .model = 0x000021, | |
391 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
392 | }, | |
031bb27c SR |
393 | /* iPod mini */ { |
394 | .firmware_revision = 0x0a2700, | |
395 | .model = 0x000022, | |
396 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
397 | }, | |
9ba136d0 KH |
398 | /* iPod mini */ { |
399 | .firmware_revision = 0x0a2700, | |
400 | .model = 0x000023, | |
401 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
402 | }, | |
403 | /* iPod Photo */ { | |
404 | .firmware_revision = 0x0a2700, | |
405 | .model = 0x00007e, | |
406 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
407 | } | |
408 | }; | |
409 | ||
53dca511 | 410 | static void free_orb(struct kref *kref) |
e57d2011 KH |
411 | { |
412 | struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); | |
413 | ||
414 | kfree(orb); | |
415 | } | |
416 | ||
53dca511 SR |
417 | static void sbp2_status_write(struct fw_card *card, struct fw_request *request, |
418 | int tcode, int destination, int source, | |
33e553fe | 419 | int generation, unsigned long long offset, |
53dca511 | 420 | void *payload, size_t length, void *callback_data) |
9ba136d0 | 421 | { |
5a3c2be6 | 422 | struct sbp2_logical_unit *lu = callback_data; |
9ba136d0 KH |
423 | struct sbp2_orb *orb; |
424 | struct sbp2_status status; | |
9ba136d0 KH |
425 | unsigned long flags; |
426 | ||
427 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
094614fc | 428 | length < 8 || length > sizeof(status)) { |
9ba136d0 KH |
429 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
430 | return; | |
431 | } | |
432 | ||
094614fc SR |
433 | status.status = be32_to_cpup(payload); |
434 | status.orb_low = be32_to_cpup(payload + 4); | |
435 | memset(status.data, 0, sizeof(status.data)); | |
436 | if (length > 8) | |
437 | memcpy(status.data, payload + 8, length - 8); | |
438 | ||
a77754a7 | 439 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
eba9ebaa SR |
440 | dev_notice(lu_dev(lu), |
441 | "non-ORB related status write, not handled\n"); | |
9ba136d0 KH |
442 | fw_send_response(card, request, RCODE_COMPLETE); |
443 | return; | |
444 | } | |
445 | ||
446 | /* Lookup the orb corresponding to this status write. */ | |
447 | spin_lock_irqsave(&card->lock, flags); | |
5a3c2be6 | 448 | list_for_each_entry(orb, &lu->orb_list, link) { |
a77754a7 | 449 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
e57d2011 KH |
450 | STATUS_GET_ORB_LOW(status) == orb->request_bus) { |
451 | orb->rcode = RCODE_COMPLETE; | |
9ba136d0 KH |
452 | list_del(&orb->link); |
453 | break; | |
454 | } | |
455 | } | |
456 | spin_unlock_irqrestore(&card->lock, flags); | |
457 | ||
baed6b82 | 458 | if (&orb->link != &lu->orb_list) { |
9ba136d0 | 459 | orb->callback(orb, &status); |
6c74340b | 460 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
baed6b82 | 461 | } else { |
eba9ebaa | 462 | dev_err(lu_dev(lu), "status write for unknown ORB\n"); |
baed6b82 | 463 | } |
e57d2011 | 464 | |
9ba136d0 KH |
465 | fw_send_response(card, request, RCODE_COMPLETE); |
466 | } | |
467 | ||
53dca511 SR |
468 | static void complete_transaction(struct fw_card *card, int rcode, |
469 | void *payload, size_t length, void *data) | |
9ba136d0 KH |
470 | { |
471 | struct sbp2_orb *orb = data; | |
472 | unsigned long flags; | |
473 | ||
e57d2011 KH |
474 | /* |
475 | * This is a little tricky. We can get the status write for | |
476 | * the orb before we get this callback. The status write | |
477 | * handler above will assume the orb pointer transaction was | |
478 | * successful and set the rcode to RCODE_COMPLETE for the orb. | |
479 | * So this callback only sets the rcode if it hasn't already | |
480 | * been set and only does the cleanup if the transaction | |
481 | * failed and we didn't already get a status write. | |
482 | */ | |
483 | spin_lock_irqsave(&card->lock, flags); | |
484 | ||
485 | if (orb->rcode == -1) | |
486 | orb->rcode = rcode; | |
7a4e1e9c | 487 | if (orb->rcode != RCODE_COMPLETE) { |
9ba136d0 | 488 | list_del(&orb->link); |
1b34e974 | 489 | spin_unlock_irqrestore(&card->lock, flags); |
6c74340b | 490 | |
9ba136d0 | 491 | orb->callback(orb, NULL); |
6c74340b | 492 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
1b34e974 SR |
493 | } else { |
494 | spin_unlock_irqrestore(&card->lock, flags); | |
9ba136d0 | 495 | } |
e57d2011 | 496 | |
6c74340b | 497 | kref_put(&orb->kref, free_orb); /* transaction callback reference */ |
9ba136d0 KH |
498 | } |
499 | ||
53dca511 SR |
500 | static void sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, |
501 | int node_id, int generation, u64 offset) | |
9ba136d0 | 502 | { |
eba9ebaa | 503 | struct fw_device *device = target_parent_device(lu->tgt); |
81bf52d8 | 504 | struct sbp2_pointer orb_pointer; |
9ba136d0 KH |
505 | unsigned long flags; |
506 | ||
81bf52d8 SR |
507 | orb_pointer.high = 0; |
508 | orb_pointer.low = cpu_to_be32(orb->request_bus); | |
9ba136d0 KH |
509 | |
510 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 511 | list_add_tail(&orb->link, &lu->orb_list); |
9ba136d0 KH |
512 | spin_unlock_irqrestore(&device->card->lock, flags); |
513 | ||
6c74340b SR |
514 | kref_get(&orb->kref); /* transaction callback reference */ |
515 | kref_get(&orb->kref); /* orb callback reference */ | |
e57d2011 | 516 | |
9ba136d0 | 517 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
f1397490 | 518 | node_id, generation, device->max_speed, offset, |
81bf52d8 | 519 | &orb_pointer, 8, complete_transaction, orb); |
9ba136d0 KH |
520 | } |
521 | ||
5a3c2be6 | 522 | static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |
9ba136d0 | 523 | { |
eba9ebaa | 524 | struct fw_device *device = target_parent_device(lu->tgt); |
9ba136d0 KH |
525 | struct sbp2_orb *orb, *next; |
526 | struct list_head list; | |
527 | unsigned long flags; | |
2aaad97b | 528 | int retval = -ENOENT; |
9ba136d0 KH |
529 | |
530 | INIT_LIST_HEAD(&list); | |
531 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 532 | list_splice_init(&lu->orb_list, &list); |
9ba136d0 KH |
533 | spin_unlock_irqrestore(&device->card->lock, flags); |
534 | ||
535 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 536 | retval = 0; |
7a4e1e9c SR |
537 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
538 | continue; | |
730c32f5 | 539 | |
9ba136d0 KH |
540 | orb->rcode = RCODE_CANCELLED; |
541 | orb->callback(orb, NULL); | |
6c74340b | 542 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
9ba136d0 | 543 | } |
9ba136d0 | 544 | |
2aaad97b | 545 | return retval; |
1d3d52c5 KH |
546 | } |
547 | ||
53dca511 SR |
548 | static void complete_management_orb(struct sbp2_orb *base_orb, |
549 | struct sbp2_status *status) | |
9ba136d0 KH |
550 | { |
551 | struct sbp2_management_orb *orb = | |
6f061487 | 552 | container_of(base_orb, struct sbp2_management_orb, base); |
9ba136d0 KH |
553 | |
554 | if (status) | |
2d826cc5 | 555 | memcpy(&orb->status, status, sizeof(*status)); |
9ba136d0 KH |
556 | complete(&orb->done); |
557 | } | |
558 | ||
53dca511 SR |
559 | static int sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id, |
560 | int generation, int function, | |
561 | int lun_or_login_id, void *response) | |
9ba136d0 | 562 | { |
eba9ebaa | 563 | struct fw_device *device = target_parent_device(lu->tgt); |
9ba136d0 | 564 | struct sbp2_management_orb *orb; |
a4c379c1 | 565 | unsigned int timeout; |
9ba136d0 KH |
566 | int retval = -ENOMEM; |
567 | ||
be6f48b0 SR |
568 | if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device)) |
569 | return 0; | |
570 | ||
c13ccfcf | 571 | orb = kzalloc(sizeof(*orb), GFP_NOIO); |
9ba136d0 KH |
572 | if (orb == NULL) |
573 | return -ENOMEM; | |
574 | ||
e57d2011 | 575 | kref_init(&orb->base.kref); |
9ba136d0 KH |
576 | orb->response_bus = |
577 | dma_map_single(device->card->device, &orb->response, | |
2d826cc5 | 578 | sizeof(orb->response), DMA_FROM_DEVICE); |
8d8bb39b | 579 | if (dma_mapping_error(device->card->device, orb->response_bus)) |
7aa48481 | 580 | goto fail_mapping_response; |
9ba136d0 | 581 | |
71ee9f01 SR |
582 | orb->request.response.high = 0; |
583 | orb->request.response.low = cpu_to_be32(orb->response_bus); | |
9ba136d0 | 584 | |
71ee9f01 | 585 | orb->request.misc = cpu_to_be32( |
a77754a7 KH |
586 | MANAGEMENT_ORB_NOTIFY | |
587 | MANAGEMENT_ORB_FUNCTION(function) | | |
71ee9f01 SR |
588 | MANAGEMENT_ORB_LUN(lun_or_login_id)); |
589 | orb->request.length = cpu_to_be32( | |
590 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response))); | |
9ba136d0 | 591 | |
71ee9f01 SR |
592 | orb->request.status_fifo.high = |
593 | cpu_to_be32(lu->address_handler.offset >> 32); | |
594 | orb->request.status_fifo.low = | |
595 | cpu_to_be32(lu->address_handler.offset); | |
9ba136d0 | 596 | |
9ba136d0 | 597 | if (function == SBP2_LOGIN_REQUEST) { |
14dc992a | 598 | /* Ask for 2^2 == 4 seconds reconnect grace period */ |
71ee9f01 | 599 | orb->request.misc |= cpu_to_be32( |
14dc992a | 600 | MANAGEMENT_ORB_RECONNECT(2) | |
71ee9f01 | 601 | MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login)); |
384170da | 602 | timeout = lu->tgt->mgt_orb_timeout; |
a4c379c1 JW |
603 | } else { |
604 | timeout = SBP2_ORB_TIMEOUT; | |
9ba136d0 KH |
605 | } |
606 | ||
9ba136d0 KH |
607 | init_completion(&orb->done); |
608 | orb->base.callback = complete_management_orb; | |
2aaad97b | 609 | |
7aa48481 SR |
610 | orb->base.request_bus = |
611 | dma_map_single(device->card->device, &orb->request, | |
612 | sizeof(orb->request), DMA_TO_DEVICE); | |
8d8bb39b | 613 | if (dma_mapping_error(device->card->device, orb->base.request_bus)) |
7aa48481 SR |
614 | goto fail_mapping_request; |
615 | ||
5a3c2be6 SR |
616 | sbp2_send_orb(&orb->base, lu, node_id, generation, |
617 | lu->tgt->management_agent_address); | |
9ba136d0 | 618 | |
a4c379c1 | 619 | wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout)); |
9ba136d0 | 620 | |
9ba136d0 | 621 | retval = -EIO; |
5a3c2be6 | 622 | if (sbp2_cancel_orbs(lu) == 0) { |
eba9ebaa SR |
623 | dev_err(lu_dev(lu), "ORB reply timed out, rcode 0x%02x\n", |
624 | orb->base.rcode); | |
9ba136d0 KH |
625 | goto out; |
626 | } | |
627 | ||
2aaad97b | 628 | if (orb->base.rcode != RCODE_COMPLETE) { |
eba9ebaa SR |
629 | dev_err(lu_dev(lu), "management write failed, rcode 0x%02x\n", |
630 | orb->base.rcode); | |
9ba136d0 KH |
631 | goto out; |
632 | } | |
633 | ||
a77754a7 KH |
634 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
635 | STATUS_GET_SBP_STATUS(orb->status) != 0) { | |
eba9ebaa | 636 | dev_err(lu_dev(lu), "error status: %d:%d\n", |
a77754a7 KH |
637 | STATUS_GET_RESPONSE(orb->status), |
638 | STATUS_GET_SBP_STATUS(orb->status)); | |
9ba136d0 KH |
639 | goto out; |
640 | } | |
641 | ||
642 | retval = 0; | |
643 | out: | |
644 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 645 | sizeof(orb->request), DMA_TO_DEVICE); |
7aa48481 | 646 | fail_mapping_request: |
9ba136d0 | 647 | dma_unmap_single(device->card->device, orb->response_bus, |
2d826cc5 | 648 | sizeof(orb->response), DMA_FROM_DEVICE); |
7aa48481 | 649 | fail_mapping_response: |
9ba136d0 | 650 | if (response) |
71ee9f01 | 651 | memcpy(response, orb->response, sizeof(orb->response)); |
e57d2011 | 652 | kref_put(&orb->base.kref, free_orb); |
9ba136d0 KH |
653 | |
654 | return retval; | |
655 | } | |
656 | ||
e0e60215 SR |
657 | static void sbp2_agent_reset(struct sbp2_logical_unit *lu) |
658 | { | |
eba9ebaa | 659 | struct fw_device *device = target_parent_device(lu->tgt); |
1e119fa9 | 660 | __be32 d = 0; |
9ba136d0 | 661 | |
1e119fa9 JF |
662 | fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, |
663 | lu->tgt->node_id, lu->generation, device->max_speed, | |
664 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
e847cc83 | 665 | &d, 4); |
9ba136d0 KH |
666 | } |
667 | ||
53dca511 SR |
668 | static void complete_agent_reset_write_no_wait(struct fw_card *card, |
669 | int rcode, void *payload, size_t length, void *data) | |
e0e60215 SR |
670 | { |
671 | kfree(data); | |
672 | } | |
673 | ||
674 | static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu) | |
9ba136d0 | 675 | { |
eba9ebaa | 676 | struct fw_device *device = target_parent_device(lu->tgt); |
9ba136d0 | 677 | struct fw_transaction *t; |
1e119fa9 | 678 | static __be32 d; |
9ba136d0 | 679 | |
e0e60215 | 680 | t = kmalloc(sizeof(*t), GFP_ATOMIC); |
9ba136d0 | 681 | if (t == NULL) |
e0e60215 | 682 | return; |
9ba136d0 KH |
683 | |
684 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
5a3c2be6 SR |
685 | lu->tgt->node_id, lu->generation, device->max_speed, |
686 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
e847cc83 | 687 | &d, 4, complete_agent_reset_write_no_wait, t); |
9ba136d0 KH |
688 | } |
689 | ||
2e2705bd SR |
690 | static inline void sbp2_allow_block(struct sbp2_logical_unit *lu) |
691 | { | |
692 | /* | |
693 | * We may access dont_block without taking card->lock here: | |
694 | * All callers of sbp2_allow_block() and all callers of sbp2_unblock() | |
695 | * are currently serialized against each other. | |
696 | * And a wrong result in sbp2_conditionally_block()'s access of | |
697 | * dont_block is rather harmless, it simply misses its first chance. | |
698 | */ | |
699 | --lu->tgt->dont_block; | |
700 | } | |
701 | ||
702 | /* | |
703 | * Blocks lu->tgt if all of the following conditions are met: | |
704 | * - Login, INQUIRY, and high-level SCSI setup of all of the target's | |
705 | * logical units have been finished (indicated by dont_block == 0). | |
706 | * - lu->generation is stale. | |
707 | * | |
708 | * Note, scsi_block_requests() must be called while holding card->lock, | |
709 | * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to | |
710 | * unblock the target. | |
711 | */ | |
712 | static void sbp2_conditionally_block(struct sbp2_logical_unit *lu) | |
713 | { | |
714 | struct sbp2_target *tgt = lu->tgt; | |
eba9ebaa | 715 | struct fw_card *card = target_parent_device(tgt)->card; |
2e2705bd SR |
716 | struct Scsi_Host *shost = |
717 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
718 | unsigned long flags; | |
719 | ||
720 | spin_lock_irqsave(&card->lock, flags); | |
721 | if (!tgt->dont_block && !lu->blocked && | |
722 | lu->generation != card->generation) { | |
723 | lu->blocked = true; | |
a5fd9ec7 | 724 | if (++tgt->blocked == 1) |
2e2705bd | 725 | scsi_block_requests(shost); |
2e2705bd SR |
726 | } |
727 | spin_unlock_irqrestore(&card->lock, flags); | |
728 | } | |
729 | ||
730 | /* | |
731 | * Unblocks lu->tgt as soon as all its logical units can be unblocked. | |
732 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
733 | * card->lock protected section. On the other hand, running it inside | |
734 | * the section might clash with shost->host_lock. | |
735 | */ | |
736 | static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu) | |
737 | { | |
738 | struct sbp2_target *tgt = lu->tgt; | |
eba9ebaa | 739 | struct fw_card *card = target_parent_device(tgt)->card; |
2e2705bd SR |
740 | struct Scsi_Host *shost = |
741 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
742 | unsigned long flags; | |
743 | bool unblock = false; | |
744 | ||
745 | spin_lock_irqsave(&card->lock, flags); | |
746 | if (lu->blocked && lu->generation == card->generation) { | |
747 | lu->blocked = false; | |
748 | unblock = --tgt->blocked == 0; | |
749 | } | |
750 | spin_unlock_irqrestore(&card->lock, flags); | |
751 | ||
a5fd9ec7 | 752 | if (unblock) |
2e2705bd | 753 | scsi_unblock_requests(shost); |
2e2705bd SR |
754 | } |
755 | ||
756 | /* | |
757 | * Prevents future blocking of tgt and unblocks it. | |
758 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
759 | * card->lock protected section. On the other hand, running it inside | |
760 | * the section might clash with shost->host_lock. | |
761 | */ | |
762 | static void sbp2_unblock(struct sbp2_target *tgt) | |
763 | { | |
eba9ebaa | 764 | struct fw_card *card = target_parent_device(tgt)->card; |
2e2705bd SR |
765 | struct Scsi_Host *shost = |
766 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
767 | unsigned long flags; | |
768 | ||
769 | spin_lock_irqsave(&card->lock, flags); | |
770 | ++tgt->dont_block; | |
771 | spin_unlock_irqrestore(&card->lock, flags); | |
772 | ||
773 | scsi_unblock_requests(shost); | |
774 | } | |
775 | ||
f8436158 SR |
776 | static int sbp2_lun2int(u16 lun) |
777 | { | |
778 | struct scsi_lun eight_bytes_lun; | |
779 | ||
780 | memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); | |
781 | eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff; | |
782 | eight_bytes_lun.scsi_lun[1] = lun & 0xff; | |
783 | ||
784 | return scsilun_to_int(&eight_bytes_lun); | |
785 | } | |
786 | ||
17cff9ff JW |
787 | /* |
788 | * Write retransmit retry values into the BUSY_TIMEOUT register. | |
789 | * - The single-phase retry protocol is supported by all SBP-2 devices, but the | |
790 | * default retry_limit value is 0 (i.e. never retry transmission). We write a | |
791 | * saner value after logging into the device. | |
792 | * - The dual-phase retry protocol is optional to implement, and if not | |
793 | * supported, writes to the dual-phase portion of the register will be | |
794 | * ignored. We try to write the original 1394-1995 default here. | |
795 | * - In the case of devices that are also SBP-3-compliant, all writes are | |
796 | * ignored, as the register is read-only, but contains single-phase retry of | |
797 | * 15, which is what we're trying to set for all SBP-2 device anyway, so this | |
798 | * write attempt is safe and yields more consistent behavior for all devices. | |
799 | * | |
800 | * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec, | |
801 | * and section 6.4 of the SBP-3 spec for further details. | |
802 | */ | |
51f9dbef JW |
803 | static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu) |
804 | { | |
eba9ebaa | 805 | struct fw_device *device = target_parent_device(lu->tgt); |
1e119fa9 | 806 | __be32 d = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT); |
51f9dbef | 807 | |
1e119fa9 JF |
808 | fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, |
809 | lu->tgt->node_id, lu->generation, device->max_speed, | |
e847cc83 | 810 | CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT, &d, 4); |
51f9dbef JW |
811 | } |
812 | ||
5a3c2be6 SR |
813 | static void sbp2_reconnect(struct work_struct *work); |
814 | ||
7f37c426 KH |
815 | static void sbp2_login(struct work_struct *work) |
816 | { | |
5a3c2be6 SR |
817 | struct sbp2_logical_unit *lu = |
818 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 | 819 | struct sbp2_target *tgt = lu->tgt; |
eba9ebaa | 820 | struct fw_device *device = target_parent_device(tgt); |
48f18c76 | 821 | struct Scsi_Host *shost; |
5a3c2be6 | 822 | struct scsi_device *sdev; |
7f37c426 | 823 | struct sbp2_login_response response; |
5a3c2be6 | 824 | int generation, node_id, local_node_id; |
7f37c426 | 825 | |
be6f48b0 | 826 | if (fw_device_is_shutdown(device)) |
6ff8147d | 827 | return; |
be6f48b0 | 828 | |
5a8a1bcd | 829 | generation = device->generation; |
621f6dd7 | 830 | smp_rmb(); /* node IDs must not be older than generation */ |
5a8a1bcd SR |
831 | node_id = device->node_id; |
832 | local_node_id = device->card->node_id; | |
7f37c426 | 833 | |
ce896d95 | 834 | /* If this is a re-login attempt, log out, or we might be rejected. */ |
f8436158 | 835 | if (lu->has_sdev) |
ce896d95 SR |
836 | sbp2_send_management_orb(lu, device->node_id, generation, |
837 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
838 | ||
5a3c2be6 SR |
839 | if (sbp2_send_management_orb(lu, node_id, generation, |
840 | SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { | |
2e2705bd | 841 | if (lu->retries++ < 5) { |
285838eb | 842 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
2e2705bd | 843 | } else { |
eba9ebaa SR |
844 | dev_err(tgt_dev(tgt), "failed to login to LUN %04x\n", |
845 | lu->lun); | |
2e2705bd SR |
846 | /* Let any waiting I/O fail from now on. */ |
847 | sbp2_unblock(lu->tgt); | |
848 | } | |
6ff8147d | 849 | return; |
7f37c426 KH |
850 | } |
851 | ||
48f18c76 SR |
852 | tgt->node_id = node_id; |
853 | tgt->address_high = local_node_id << 16; | |
621f6dd7 SR |
854 | smp_wmb(); /* node IDs must not be older than generation */ |
855 | lu->generation = generation; | |
7f37c426 | 856 | |
5a3c2be6 | 857 | lu->command_block_agent_address = |
71ee9f01 SR |
858 | ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff) |
859 | << 32) | be32_to_cpu(response.command_block_agent.low); | |
860 | lu->login_id = be32_to_cpu(response.misc) & 0xffff; | |
7f37c426 | 861 | |
eba9ebaa SR |
862 | dev_notice(tgt_dev(tgt), "logged in to LUN %04x (%d retries)\n", |
863 | lu->lun, lu->retries); | |
7f37c426 | 864 | |
51f9dbef JW |
865 | /* set appropriate retry limit(s) in BUSY_TIMEOUT register */ |
866 | sbp2_set_busy_timeout(lu); | |
7f37c426 | 867 | |
70044d71 | 868 | lu->workfn = sbp2_reconnect; |
5a3c2be6 SR |
869 | sbp2_agent_reset(lu); |
870 | ||
0fa6dfdb | 871 | /* This was a re-login. */ |
f8436158 | 872 | if (lu->has_sdev) { |
0fa6dfdb | 873 | sbp2_cancel_orbs(lu); |
2e2705bd | 874 | sbp2_conditionally_unblock(lu); |
6ff8147d SR |
875 | |
876 | return; | |
0fa6dfdb SR |
877 | } |
878 | ||
9220f194 SR |
879 | if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) |
880 | ssleep(SBP2_INQUIRY_DELAY); | |
881 | ||
48f18c76 | 882 | shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
f8436158 | 883 | sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu); |
e80de370 SR |
884 | /* |
885 | * FIXME: We are unable to perform reconnects while in sbp2_login(). | |
886 | * Therefore __scsi_add_device() will get into trouble if a bus reset | |
887 | * happens in parallel. It will either fail or leave us with an | |
888 | * unusable sdev. As a workaround we check for this and retry the | |
889 | * whole login and SCSI probing. | |
890 | */ | |
1b9c12ba | 891 | |
e80de370 SR |
892 | /* Reported error during __scsi_add_device() */ |
893 | if (IS_ERR(sdev)) | |
894 | goto out_logout_login; | |
895 | ||
e80de370 SR |
896 | /* Unreported error during __scsi_add_device() */ |
897 | smp_rmb(); /* get current card generation */ | |
898 | if (generation != device->card->generation) { | |
899 | scsi_remove_device(sdev); | |
33f1c6c3 | 900 | scsi_device_put(sdev); |
e80de370 | 901 | goto out_logout_login; |
7f37c426 | 902 | } |
e80de370 SR |
903 | |
904 | /* No error during __scsi_add_device() */ | |
f8436158 SR |
905 | lu->has_sdev = true; |
906 | scsi_device_put(sdev); | |
2e2705bd | 907 | sbp2_allow_block(lu); |
6ff8147d SR |
908 | |
909 | return; | |
e80de370 SR |
910 | |
911 | out_logout_login: | |
912 | smp_rmb(); /* generation may have changed */ | |
913 | generation = device->generation; | |
914 | smp_rmb(); /* node_id must not be older than generation */ | |
915 | ||
916 | sbp2_send_management_orb(lu, device->node_id, generation, | |
917 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
918 | /* | |
919 | * If a bus reset happened, sbp2_update will have requeued | |
920 | * lu->work already. Reset the work from reconnect to login. | |
921 | */ | |
70044d71 | 922 | lu->workfn = sbp2_login; |
7f37c426 | 923 | } |
9ba136d0 | 924 | |
b2af07b6 SR |
925 | static void sbp2_reconnect(struct work_struct *work) |
926 | { | |
927 | struct sbp2_logical_unit *lu = | |
928 | container_of(work, struct sbp2_logical_unit, work.work); | |
929 | struct sbp2_target *tgt = lu->tgt; | |
eba9ebaa | 930 | struct fw_device *device = target_parent_device(tgt); |
b2af07b6 SR |
931 | int generation, node_id, local_node_id; |
932 | ||
933 | if (fw_device_is_shutdown(device)) | |
934 | return; | |
935 | ||
936 | generation = device->generation; | |
937 | smp_rmb(); /* node IDs must not be older than generation */ | |
938 | node_id = device->node_id; | |
939 | local_node_id = device->card->node_id; | |
940 | ||
941 | if (sbp2_send_management_orb(lu, node_id, generation, | |
942 | SBP2_RECONNECT_REQUEST, | |
943 | lu->login_id, NULL) < 0) { | |
944 | /* | |
945 | * If reconnect was impossible even though we are in the | |
946 | * current generation, fall back and try to log in again. | |
947 | * | |
948 | * We could check for "Function rejected" status, but | |
949 | * looking at the bus generation as simpler and more general. | |
950 | */ | |
951 | smp_rmb(); /* get current card generation */ | |
952 | if (generation == device->card->generation || | |
953 | lu->retries++ >= 5) { | |
eba9ebaa | 954 | dev_err(tgt_dev(tgt), "failed to reconnect\n"); |
b2af07b6 | 955 | lu->retries = 0; |
70044d71 | 956 | lu->workfn = sbp2_login; |
b2af07b6 SR |
957 | } |
958 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); | |
959 | ||
960 | return; | |
961 | } | |
962 | ||
963 | tgt->node_id = node_id; | |
964 | tgt->address_high = local_node_id << 16; | |
965 | smp_wmb(); /* node IDs must not be older than generation */ | |
966 | lu->generation = generation; | |
967 | ||
eba9ebaa SR |
968 | dev_notice(tgt_dev(tgt), "reconnected to LUN %04x (%d retries)\n", |
969 | lu->lun, lu->retries); | |
b2af07b6 SR |
970 | |
971 | sbp2_agent_reset(lu); | |
972 | sbp2_cancel_orbs(lu); | |
973 | sbp2_conditionally_unblock(lu); | |
974 | } | |
975 | ||
70044d71 TH |
976 | static void sbp2_lu_workfn(struct work_struct *work) |
977 | { | |
978 | struct sbp2_logical_unit *lu = container_of(to_delayed_work(work), | |
979 | struct sbp2_logical_unit, work); | |
980 | lu->workfn(work); | |
981 | } | |
982 | ||
5a3c2be6 | 983 | static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) |
9ba136d0 | 984 | { |
5a3c2be6 | 985 | struct sbp2_logical_unit *lu; |
9ba136d0 | 986 | |
5a3c2be6 SR |
987 | lu = kmalloc(sizeof(*lu), GFP_KERNEL); |
988 | if (!lu) | |
989 | return -ENOMEM; | |
9ba136d0 | 990 | |
5a3c2be6 SR |
991 | lu->address_handler.length = 0x100; |
992 | lu->address_handler.address_callback = sbp2_status_write; | |
993 | lu->address_handler.callback_data = lu; | |
9ba136d0 | 994 | |
5a3c2be6 SR |
995 | if (fw_core_add_address_handler(&lu->address_handler, |
996 | &fw_high_memory_region) < 0) { | |
997 | kfree(lu); | |
998 | return -ENOMEM; | |
999 | } | |
9ba136d0 | 1000 | |
f8436158 SR |
1001 | lu->tgt = tgt; |
1002 | lu->lun = lun_entry & 0xffff; | |
cd1f70fd | 1003 | lu->login_id = INVALID_LOGIN_ID; |
f8436158 SR |
1004 | lu->retries = 0; |
1005 | lu->has_sdev = false; | |
1006 | lu->blocked = false; | |
2e2705bd | 1007 | ++tgt->dont_block; |
5a3c2be6 | 1008 | INIT_LIST_HEAD(&lu->orb_list); |
70044d71 TH |
1009 | lu->workfn = sbp2_login; |
1010 | INIT_DELAYED_WORK(&lu->work, sbp2_lu_workfn); | |
9ba136d0 | 1011 | |
5a3c2be6 SR |
1012 | list_add_tail(&lu->link, &tgt->lu_list); |
1013 | return 0; | |
1014 | } | |
ad85274f | 1015 | |
8ff6a757 CB |
1016 | static void sbp2_get_unit_unique_id(struct sbp2_target *tgt, |
1017 | const u32 *leaf) | |
1018 | { | |
1019 | if ((leaf[0] & 0xffff0000) == 0x00020000) | |
1020 | tgt->guid = (u64)leaf[1] << 32 | leaf[2]; | |
1021 | } | |
1022 | ||
13b302d0 SR |
1023 | static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, |
1024 | const u32 *directory) | |
5a3c2be6 SR |
1025 | { |
1026 | struct fw_csr_iterator ci; | |
1027 | int key, value; | |
9ba136d0 | 1028 | |
5a3c2be6 SR |
1029 | fw_csr_iterator_init(&ci, directory); |
1030 | while (fw_csr_iterator_next(&ci, &key, &value)) | |
1031 | if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && | |
1032 | sbp2_add_logical_unit(tgt, value) < 0) | |
1033 | return -ENOMEM; | |
1034 | return 0; | |
1035 | } | |
1036 | ||
13b302d0 | 1037 | static int sbp2_scan_unit_dir(struct sbp2_target *tgt, const u32 *directory, |
5a3c2be6 SR |
1038 | u32 *model, u32 *firmware_revision) |
1039 | { | |
1040 | struct fw_csr_iterator ci; | |
1041 | int key, value; | |
1042 | ||
1043 | fw_csr_iterator_init(&ci, directory); | |
9ba136d0 KH |
1044 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
1045 | switch (key) { | |
5a3c2be6 | 1046 | |
9ba136d0 | 1047 | case CSR_DEPENDENT_INFO | CSR_OFFSET: |
5a3c2be6 SR |
1048 | tgt->management_agent_address = |
1049 | CSR_REGISTER_BASE + 4 * value; | |
9ba136d0 | 1050 | break; |
5a3c2be6 SR |
1051 | |
1052 | case CSR_DIRECTORY_ID: | |
1053 | tgt->directory_id = value; | |
9ba136d0 | 1054 | break; |
5a3c2be6 | 1055 | |
9ba136d0 | 1056 | case CSR_MODEL: |
5a3c2be6 SR |
1057 | *model = value; |
1058 | break; | |
1059 | ||
1060 | case SBP2_CSR_FIRMWARE_REVISION: | |
1061 | *firmware_revision = value; | |
1062 | break; | |
1063 | ||
384170da JW |
1064 | case SBP2_CSR_UNIT_CHARACTERISTICS: |
1065 | /* the timeout value is stored in 500ms units */ | |
eaf76e0d | 1066 | tgt->mgt_orb_timeout = (value >> 8 & 0xff) * 500; |
384170da JW |
1067 | break; |
1068 | ||
5a3c2be6 SR |
1069 | case SBP2_CSR_LOGICAL_UNIT_NUMBER: |
1070 | if (sbp2_add_logical_unit(tgt, value) < 0) | |
1071 | return -ENOMEM; | |
1072 | break; | |
1073 | ||
8ff6a757 CB |
1074 | case SBP2_CSR_UNIT_UNIQUE_ID: |
1075 | sbp2_get_unit_unique_id(tgt, ci.p - 1 + value); | |
1076 | break; | |
1077 | ||
5a3c2be6 | 1078 | case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: |
0e3e2eab RS |
1079 | /* Adjust for the increment in the iterator */ |
1080 | if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0) | |
5a3c2be6 | 1081 | return -ENOMEM; |
9ba136d0 KH |
1082 | break; |
1083 | } | |
1084 | } | |
5a3c2be6 SR |
1085 | return 0; |
1086 | } | |
1087 | ||
eaf76e0d SR |
1088 | /* |
1089 | * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be | |
1090 | * provided in the config rom. Most devices do provide a value, which | |
1091 | * we'll use for login management orbs, but with some sane limits. | |
1092 | */ | |
1093 | static void sbp2_clamp_management_orb_timeout(struct sbp2_target *tgt) | |
1094 | { | |
1095 | unsigned int timeout = tgt->mgt_orb_timeout; | |
1096 | ||
1097 | if (timeout > 40000) | |
eba9ebaa SR |
1098 | dev_notice(tgt_dev(tgt), "%ds mgt_ORB_timeout limited to 40s\n", |
1099 | timeout / 1000); | |
eaf76e0d SR |
1100 | |
1101 | tgt->mgt_orb_timeout = clamp_val(timeout, 5000, 40000); | |
1102 | } | |
1103 | ||
5a3c2be6 SR |
1104 | static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, |
1105 | u32 firmware_revision) | |
1106 | { | |
1107 | int i; | |
05cca738 | 1108 | unsigned int w = sbp2_param_workarounds; |
2df222b8 SR |
1109 | |
1110 | if (w) | |
eba9ebaa SR |
1111 | dev_notice(tgt_dev(tgt), |
1112 | "Please notify linux1394-devel@lists.sf.net " | |
1113 | "if you need the workarounds parameter\n"); | |
5a3c2be6 | 1114 | |
2df222b8 SR |
1115 | if (w & SBP2_WORKAROUND_OVERRIDE) |
1116 | goto out; | |
9ba136d0 KH |
1117 | |
1118 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
5a3c2be6 | 1119 | |
9ba136d0 KH |
1120 | if (sbp2_workarounds_table[i].firmware_revision != |
1121 | (firmware_revision & 0xffffff00)) | |
1122 | continue; | |
5a3c2be6 | 1123 | |
9ba136d0 | 1124 | if (sbp2_workarounds_table[i].model != model && |
f746072a | 1125 | sbp2_workarounds_table[i].model != SBP2_ROM_VALUE_WILDCARD) |
9ba136d0 | 1126 | continue; |
5a3c2be6 | 1127 | |
2df222b8 | 1128 | w |= sbp2_workarounds_table[i].workarounds; |
9ba136d0 KH |
1129 | break; |
1130 | } | |
2df222b8 SR |
1131 | out: |
1132 | if (w) | |
eba9ebaa SR |
1133 | dev_notice(tgt_dev(tgt), "workarounds 0x%x " |
1134 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", | |
1135 | w, firmware_revision, model); | |
2df222b8 | 1136 | tgt->workarounds = w; |
5a3c2be6 SR |
1137 | } |
1138 | ||
1139 | static struct scsi_host_template scsi_driver_template; | |
94a87157 | 1140 | static void sbp2_remove(struct fw_unit *unit); |
5a3c2be6 | 1141 | |
94a87157 | 1142 | static int sbp2_probe(struct fw_unit *unit, const struct ieee1394_device_id *id) |
5a3c2be6 | 1143 | { |
e5110d01 | 1144 | struct fw_device *device = fw_parent_device(unit); |
5a3c2be6 SR |
1145 | struct sbp2_target *tgt; |
1146 | struct sbp2_logical_unit *lu; | |
1147 | struct Scsi_Host *shost; | |
1148 | u32 model, firmware_revision; | |
1149 | ||
74044563 CB |
1150 | /* cannot (or should not) handle targets on the local node */ |
1151 | if (device->is_local) | |
1152 | return -ENODEV; | |
1153 | ||
09b12dd4 | 1154 | if (dma_get_max_seg_size(device->card->device) > SBP2_MAX_SEG_SIZE) |
d6c8cefc SR |
1155 | WARN_ON(dma_set_max_seg_size(device->card->device, |
1156 | SBP2_MAX_SEG_SIZE)); | |
09b12dd4 | 1157 | |
5a3c2be6 SR |
1158 | shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); |
1159 | if (shost == NULL) | |
1160 | return -ENOMEM; | |
1161 | ||
1162 | tgt = (struct sbp2_target *)shost->hostdata; | |
d961450d | 1163 | dev_set_drvdata(&unit->device, tgt); |
5a3c2be6 | 1164 | tgt->unit = unit; |
5a3c2be6 | 1165 | INIT_LIST_HEAD(&tgt->lu_list); |
c9755e14 | 1166 | tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; |
5a3c2be6 SR |
1167 | |
1168 | if (fw_device_enable_phys_dma(device) < 0) | |
1169 | goto fail_shost_put; | |
1170 | ||
af271941 SR |
1171 | shost->max_cmd_len = SBP2_MAX_CDB_SIZE; |
1172 | ||
473ffe65 CL |
1173 | if (scsi_add_host_with_dma(shost, &unit->device, |
1174 | device->card->device) < 0) | |
5a3c2be6 SR |
1175 | goto fail_shost_put; |
1176 | ||
5a3c2be6 SR |
1177 | /* implicit directory ID */ |
1178 | tgt->directory_id = ((unit->directory - device->config_rom) * 4 | |
1179 | + CSR_CONFIG_ROM) & 0xffffff; | |
1180 | ||
f746072a SR |
1181 | firmware_revision = SBP2_ROM_VALUE_MISSING; |
1182 | model = SBP2_ROM_VALUE_MISSING; | |
1183 | ||
5a3c2be6 SR |
1184 | if (sbp2_scan_unit_dir(tgt, unit->directory, &model, |
1185 | &firmware_revision) < 0) | |
32ce38f4 | 1186 | goto fail_remove; |
5a3c2be6 | 1187 | |
eaf76e0d | 1188 | sbp2_clamp_management_orb_timeout(tgt); |
5a3c2be6 | 1189 | sbp2_init_workarounds(tgt, model, firmware_revision); |
9ba136d0 | 1190 | |
a08e100a SR |
1191 | /* |
1192 | * At S100 we can do 512 bytes per packet, at S200 1024 bytes, | |
1193 | * and so on up to 4096 bytes. The SBP-2 max_payload field | |
1194 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
1195 | * if we set this to max_speed + 7, we get the right value. | |
1196 | */ | |
4ec4a67a SR |
1197 | tgt->max_payload = min3(device->max_speed + 7, 10U, |
1198 | device->card->max_receive - 1); | |
a08e100a | 1199 | |
285838eb | 1200 | /* Do the login in a workqueue so we can easily reschedule retries. */ |
5a3c2be6 | 1201 | list_for_each_entry(lu, &tgt->lu_list, link) |
0dcfeb7e | 1202 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
6ff8147d | 1203 | |
9ba136d0 | 1204 | return 0; |
ad85274f | 1205 | |
32ce38f4 | 1206 | fail_remove: |
94a87157 | 1207 | sbp2_remove(unit); |
5a3c2be6 SR |
1208 | return -ENOMEM; |
1209 | ||
1210 | fail_shost_put: | |
1211 | scsi_host_put(shost); | |
1212 | return -ENOMEM; | |
9ba136d0 KH |
1213 | } |
1214 | ||
b2af07b6 | 1215 | static void sbp2_update(struct fw_unit *unit) |
9ba136d0 | 1216 | { |
d961450d | 1217 | struct sbp2_target *tgt = dev_get_drvdata(&unit->device); |
0278ccd9 CB |
1218 | struct sbp2_logical_unit *lu; |
1219 | ||
b2af07b6 | 1220 | fw_device_enable_phys_dma(fw_parent_device(unit)); |
6ff8147d | 1221 | |
b2af07b6 SR |
1222 | /* |
1223 | * Fw-core serializes sbp2_update() against sbp2_remove(). | |
1224 | * Iteration over tgt->lu_list is therefore safe here. | |
1225 | */ | |
1226 | list_for_each_entry(lu, &tgt->lu_list, link) { | |
1227 | sbp2_conditionally_block(lu); | |
1228 | lu->retries = 0; | |
1229 | sbp2_queue_work(lu, 0); | |
1230 | } | |
9ba136d0 KH |
1231 | } |
1232 | ||
94a87157 | 1233 | static void sbp2_remove(struct fw_unit *unit) |
9ba136d0 | 1234 | { |
32ce38f4 SR |
1235 | struct fw_device *device = fw_parent_device(unit); |
1236 | struct sbp2_target *tgt = dev_get_drvdata(&unit->device); | |
b2af07b6 SR |
1237 | struct sbp2_logical_unit *lu, *next; |
1238 | struct Scsi_Host *shost = | |
1239 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
1240 | struct scsi_device *sdev; | |
be6f48b0 | 1241 | |
b2af07b6 SR |
1242 | /* prevent deadlocks */ |
1243 | sbp2_unblock(tgt); | |
9ba136d0 | 1244 | |
b2af07b6 | 1245 | list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { |
32ce38f4 | 1246 | cancel_delayed_work_sync(&lu->work); |
b2af07b6 SR |
1247 | sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun)); |
1248 | if (sdev) { | |
1249 | scsi_remove_device(sdev); | |
1250 | scsi_device_put(sdev); | |
7f37c426 | 1251 | } |
b2af07b6 SR |
1252 | if (lu->login_id != INVALID_LOGIN_ID) { |
1253 | int generation, node_id; | |
1254 | /* | |
1255 | * tgt->node_id may be obsolete here if we failed | |
1256 | * during initial login or after a bus reset where | |
1257 | * the topology changed. | |
1258 | */ | |
1259 | generation = device->generation; | |
1260 | smp_rmb(); /* node_id vs. generation */ | |
1261 | node_id = device->node_id; | |
1262 | sbp2_send_management_orb(lu, node_id, generation, | |
1263 | SBP2_LOGOUT_REQUEST, | |
1264 | lu->login_id, NULL); | |
1265 | } | |
1266 | fw_core_remove_address_handler(&lu->address_handler); | |
1267 | list_del(&lu->link); | |
1268 | kfree(lu); | |
7f37c426 | 1269 | } |
b2af07b6 | 1270 | scsi_remove_host(shost); |
94a87157 | 1271 | dev_notice(&unit->device, "released target %d:0:0\n", shost->host_no); |
9ba136d0 | 1272 | |
b2af07b6 | 1273 | scsi_host_put(shost); |
9ba136d0 KH |
1274 | } |
1275 | ||
1276 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
1277 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
1278 | ||
b3b29888 | 1279 | static const struct ieee1394_device_id sbp2_id_table[] = { |
9ba136d0 | 1280 | { |
b3b29888 SR |
1281 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | |
1282 | IEEE1394_MATCH_VERSION, | |
9ba136d0 | 1283 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, |
5af4e5ea | 1284 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
1285 | }, |
1286 | { } | |
1287 | }; | |
1288 | ||
1289 | static struct fw_driver sbp2_driver = { | |
1290 | .driver = { | |
1291 | .owner = THIS_MODULE, | |
0c22ecde | 1292 | .name = KBUILD_MODNAME, |
9ba136d0 | 1293 | .bus = &fw_bus_type, |
9ba136d0 | 1294 | }, |
94a87157 | 1295 | .probe = sbp2_probe, |
9ba136d0 | 1296 | .update = sbp2_update, |
94a87157 | 1297 | .remove = sbp2_remove, |
9ba136d0 KH |
1298 | .id_table = sbp2_id_table, |
1299 | }; | |
1300 | ||
5e212567 SR |
1301 | static void sbp2_unmap_scatterlist(struct device *card_device, |
1302 | struct sbp2_command_orb *orb) | |
1303 | { | |
f2030223 | 1304 | scsi_dma_unmap(orb->cmd); |
5e212567 SR |
1305 | |
1306 | if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT)) | |
1307 | dma_unmap_single(card_device, orb->page_table_bus, | |
1308 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
1309 | } | |
1310 | ||
53dca511 | 1311 | static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) |
9ba136d0 | 1312 | { |
fbb5423c | 1313 | int sam_status; |
6503de65 | 1314 | int sfmt = (sbp2_status[0] >> 6) & 0x03; |
fbb5423c | 1315 | |
6503de65 CB |
1316 | if (sfmt == 2 || sfmt == 3) { |
1317 | /* | |
1318 | * Reserved for future standardization (2) or | |
1319 | * Status block format vendor-dependent (3) | |
1320 | */ | |
1321 | return DID_ERROR << 16; | |
1322 | } | |
fbb5423c | 1323 | |
6503de65 | 1324 | sense_data[0] = 0x70 | sfmt | (sbp2_status[1] & 0x80); |
9ba136d0 | 1325 | sense_data[1] = 0x0; |
6503de65 | 1326 | sense_data[2] = ((sbp2_status[1] << 1) & 0xe0) | (sbp2_status[1] & 0x0f); |
9ba136d0 KH |
1327 | sense_data[3] = sbp2_status[4]; |
1328 | sense_data[4] = sbp2_status[5]; | |
1329 | sense_data[5] = sbp2_status[6]; | |
1330 | sense_data[6] = sbp2_status[7]; | |
1331 | sense_data[7] = 10; | |
1332 | sense_data[8] = sbp2_status[8]; | |
1333 | sense_data[9] = sbp2_status[9]; | |
1334 | sense_data[10] = sbp2_status[10]; | |
1335 | sense_data[11] = sbp2_status[11]; | |
1336 | sense_data[12] = sbp2_status[2]; | |
1337 | sense_data[13] = sbp2_status[3]; | |
1338 | sense_data[14] = sbp2_status[12]; | |
1339 | sense_data[15] = sbp2_status[13]; | |
1340 | ||
fbb5423c | 1341 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 1342 | |
fbb5423c KH |
1343 | switch (sam_status) { |
1344 | case SAM_STAT_GOOD: | |
9ba136d0 | 1345 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 1346 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 1347 | case SAM_STAT_BUSY: |
9ba136d0 KH |
1348 | case SAM_STAT_RESERVATION_CONFLICT: |
1349 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
1350 | return DID_OK << 16 | sam_status; |
1351 | ||
9ba136d0 | 1352 | default: |
fbb5423c | 1353 | return DID_ERROR << 16; |
9ba136d0 KH |
1354 | } |
1355 | } | |
1356 | ||
53dca511 SR |
1357 | static void complete_command_orb(struct sbp2_orb *base_orb, |
1358 | struct sbp2_status *status) | |
9ba136d0 | 1359 | { |
6f061487 JF |
1360 | struct sbp2_command_orb *orb = |
1361 | container_of(base_orb, struct sbp2_command_orb, base); | |
eba9ebaa | 1362 | struct fw_device *device = target_parent_device(orb->lu->tgt); |
9ba136d0 KH |
1363 | int result; |
1364 | ||
1365 | if (status != NULL) { | |
a77754a7 | 1366 | if (STATUS_GET_DEAD(*status)) |
e0e60215 | 1367 | sbp2_agent_reset_no_wait(orb->lu); |
9ba136d0 | 1368 | |
a77754a7 | 1369 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 1370 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 1371 | result = DID_OK << 16; |
9ba136d0 KH |
1372 | break; |
1373 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 1374 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
1375 | break; |
1376 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
1377 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
1378 | default: | |
fbb5423c | 1379 | result = DID_ERROR << 16; |
9ba136d0 KH |
1380 | break; |
1381 | } | |
1382 | ||
a77754a7 KH |
1383 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
1384 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
1385 | orb->cmd->sense_buffer); |
1386 | } else { | |
c781c06d KH |
1387 | /* |
1388 | * If the orb completes with status == NULL, something | |
9ba136d0 | 1389 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
1390 | * or when sending the write (less likely). |
1391 | */ | |
fbb5423c | 1392 | result = DID_BUS_BUSY << 16; |
2e2705bd | 1393 | sbp2_conditionally_block(orb->lu); |
9ba136d0 KH |
1394 | } |
1395 | ||
1396 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 1397 | sizeof(orb->request), DMA_TO_DEVICE); |
5e212567 | 1398 | sbp2_unmap_scatterlist(device->card->device, orb); |
9ba136d0 | 1399 | |
fbb5423c | 1400 | orb->cmd->result = result; |
b75ca5ea | 1401 | orb->cmd->scsi_done(orb->cmd); |
9ba136d0 KH |
1402 | } |
1403 | ||
53dca511 SR |
1404 | static int sbp2_map_scatterlist(struct sbp2_command_orb *orb, |
1405 | struct fw_device *device, struct sbp2_logical_unit *lu) | |
9ba136d0 | 1406 | { |
09b12dd4 SR |
1407 | struct scatterlist *sg = scsi_sglist(orb->cmd); |
1408 | int i, n; | |
1409 | ||
f2030223 CL |
1410 | n = scsi_dma_map(orb->cmd); |
1411 | if (n <= 0) | |
95ffc5e3 | 1412 | goto fail; |
9ba136d0 | 1413 | |
c781c06d KH |
1414 | /* |
1415 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
1416 | * the scatter list by converting it to an immediate block |
1417 | * request. This is also a workaround for broken devices such | |
1418 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
1419 | * tables. |
1420 | */ | |
09b12dd4 | 1421 | if (n == 1) { |
71ee9f01 SR |
1422 | orb->request.data_descriptor.high = |
1423 | cpu_to_be32(lu->tgt->address_high); | |
1424 | orb->request.data_descriptor.low = | |
1425 | cpu_to_be32(sg_dma_address(sg)); | |
1426 | orb->request.misc |= | |
1427 | cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg))); | |
95ffc5e3 | 1428 | return 0; |
9ba136d0 KH |
1429 | } |
1430 | ||
09b12dd4 SR |
1431 | for_each_sg(sg, sg, n, i) { |
1432 | orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16); | |
1433 | orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg)); | |
9ba136d0 KH |
1434 | } |
1435 | ||
b4be016a SR |
1436 | orb->page_table_bus = |
1437 | dma_map_single(device->card->device, orb->page_table, | |
1438 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
8d8bb39b | 1439 | if (dma_mapping_error(device->card->device, orb->page_table_bus)) |
b4be016a | 1440 | goto fail_page_table; |
9ba136d0 | 1441 | |
c781c06d KH |
1442 | /* |
1443 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
1444 | * to fill in the node ID part of the address. All other |
1445 | * pointers assume that the data referenced reside on the | |
1446 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
1447 | * on other nodes so we need to put our ID in descriptor.high. |
1448 | */ | |
71ee9f01 SR |
1449 | orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high); |
1450 | orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus); | |
1451 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT | | |
09b12dd4 | 1452 | COMMAND_ORB_DATA_SIZE(n)); |
9ba136d0 | 1453 | |
95ffc5e3 KH |
1454 | return 0; |
1455 | ||
1456 | fail_page_table: | |
f2030223 | 1457 | scsi_dma_unmap(orb->cmd); |
95ffc5e3 KH |
1458 | fail: |
1459 | return -ENOMEM; | |
9ba136d0 KH |
1460 | } |
1461 | ||
9ba136d0 KH |
1462 | /* SCSI stack integration */ |
1463 | ||
b75ca5ea SR |
1464 | static int sbp2_scsi_queuecommand(struct Scsi_Host *shost, |
1465 | struct scsi_cmnd *cmd) | |
9ba136d0 | 1466 | { |
5a3c2be6 | 1467 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
eba9ebaa | 1468 | struct fw_device *device = target_parent_device(lu->tgt); |
9ba136d0 | 1469 | struct sbp2_command_orb *orb; |
4bbc1bdd | 1470 | int generation, retval = SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1471 | |
c781c06d KH |
1472 | /* |
1473 | * Bidirectional commands are not yet implemented, and unknown | |
1474 | * transfer direction not handled. | |
1475 | */ | |
9ba136d0 | 1476 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
eba9ebaa | 1477 | dev_err(lu_dev(lu), "cannot handle bidirectional command\n"); |
e1b68c4d | 1478 | cmd->result = DID_ERROR << 16; |
b75ca5ea | 1479 | cmd->scsi_done(cmd); |
e1b68c4d | 1480 | return 0; |
9ba136d0 KH |
1481 | } |
1482 | ||
2d826cc5 | 1483 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
cfb0c9d1 | 1484 | if (orb == NULL) |
5a3c2be6 | 1485 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1486 | |
12f26aa1 KH |
1487 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
1488 | orb->base.rcode = -1; | |
e57d2011 | 1489 | kref_init(&orb->base.kref); |
b75ca5ea SR |
1490 | orb->lu = lu; |
1491 | orb->cmd = cmd; | |
a08e100a | 1492 | orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL); |
71ee9f01 | 1493 | orb->request.misc = cpu_to_be32( |
a08e100a | 1494 | COMMAND_ORB_MAX_PAYLOAD(lu->tgt->max_payload) | |
f1397490 | 1495 | COMMAND_ORB_SPEED(device->max_speed) | |
71ee9f01 | 1496 | COMMAND_ORB_NOTIFY); |
9ba136d0 KH |
1497 | |
1498 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
0d7dcbf2 | 1499 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION); |
9ba136d0 | 1500 | |
4bbc1bdd SR |
1501 | generation = device->generation; |
1502 | smp_rmb(); /* sbp2_map_scatterlist looks at tgt->address_high */ | |
1503 | ||
5a3c2be6 SR |
1504 | if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) |
1505 | goto out; | |
9ba136d0 | 1506 | |
64a87b24 | 1507 | memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len); |
9ba136d0 KH |
1508 | |
1509 | orb->base.callback = complete_command_orb; | |
8526392a SR |
1510 | orb->base.request_bus = |
1511 | dma_map_single(device->card->device, &orb->request, | |
1512 | sizeof(orb->request), DMA_TO_DEVICE); | |
5e212567 SR |
1513 | if (dma_mapping_error(device->card->device, orb->base.request_bus)) { |
1514 | sbp2_unmap_scatterlist(device->card->device, orb); | |
5a3c2be6 | 1515 | goto out; |
5e212567 | 1516 | } |
82eff9db | 1517 | |
4bbc1bdd | 1518 | sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation, |
5a3c2be6 SR |
1519 | lu->command_block_agent_address + SBP2_ORB_POINTER); |
1520 | retval = 0; | |
1521 | out: | |
e57d2011 | 1522 | kref_put(&orb->base.kref, free_orb); |
5a3c2be6 | 1523 | return retval; |
9ba136d0 KH |
1524 | } |
1525 | ||
cfb01381 SR |
1526 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1527 | { | |
5a3c2be6 | 1528 | struct sbp2_logical_unit *lu = sdev->hostdata; |
cfb01381 | 1529 | |
5513c5f6 SR |
1530 | /* (Re-)Adding logical units via the SCSI stack is not supported. */ |
1531 | if (!lu) | |
1532 | return -ENOSYS; | |
1533 | ||
cfb01381 SR |
1534 | sdev->allow_restart = 1; |
1535 | ||
26c72e22 CL |
1536 | /* |
1537 | * SBP-2 does not require any alignment, but we set it anyway | |
1538 | * for compatibility with earlier versions of this driver. | |
1539 | */ | |
8ac3a47c | 1540 | blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1); |
465ff318 | 1541 | |
5a3c2be6 | 1542 | if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
cfb01381 | 1543 | sdev->inquiry_len = 36; |
5a3c2be6 | 1544 | |
cfb01381 SR |
1545 | return 0; |
1546 | } | |
1547 | ||
9ba136d0 KH |
1548 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1549 | { | |
5a3c2be6 | 1550 | struct sbp2_logical_unit *lu = sdev->hostdata; |
9ba136d0 | 1551 | |
cfb01381 SR |
1552 | sdev->use_10_for_rw = 1; |
1553 | ||
2635f96f SR |
1554 | if (sbp2_param_exclusive_login) |
1555 | sdev->manage_start_stop = 1; | |
1556 | ||
cfb01381 SR |
1557 | if (sdev->type == TYPE_ROM) |
1558 | sdev->use_10_for_ms = 1; | |
5a3c2be6 | 1559 | |
9ba136d0 | 1560 | if (sdev->type == TYPE_DISK && |
5a3c2be6 | 1561 | lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
9ba136d0 | 1562 | sdev->skip_ms_page_8 = 1; |
5a3c2be6 SR |
1563 | |
1564 | if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) | |
9ba136d0 | 1565 | sdev->fix_capacity = 1; |
5a3c2be6 | 1566 | |
ffcaade3 SR |
1567 | if (lu->tgt->workarounds & SBP2_WORKAROUND_POWER_CONDITION) |
1568 | sdev->start_stop_pwr_cond = 1; | |
1569 | ||
5a3c2be6 | 1570 | if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
086fa5ff | 1571 | blk_queue_max_hw_sectors(sdev->request_queue, 128 * 1024 / 512); |
5a3c2be6 | 1572 | |
9ba136d0 KH |
1573 | return 0; |
1574 | } | |
1575 | ||
1576 | /* | |
1577 | * Called by scsi stack when something has really gone wrong. Usually | |
1578 | * called when a command has timed-out for some reason. | |
1579 | */ | |
1580 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1581 | { | |
5a3c2be6 | 1582 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
9ba136d0 | 1583 | |
eba9ebaa | 1584 | dev_notice(lu_dev(lu), "sbp2_scsi_abort\n"); |
5a3c2be6 SR |
1585 | sbp2_agent_reset(lu); |
1586 | sbp2_cancel_orbs(lu); | |
9ba136d0 KH |
1587 | |
1588 | return SUCCESS; | |
1589 | } | |
1590 | ||
14e21986 SR |
1591 | /* |
1592 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: | |
1593 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) | |
1594 | * | |
1595 | * This is the concatenation of target port identifier and logical unit | |
1596 | * identifier as per SAM-2...SAM-4 annex A. | |
1597 | */ | |
53dca511 SR |
1598 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
1599 | struct device_attribute *attr, char *buf) | |
14e21986 SR |
1600 | { |
1601 | struct scsi_device *sdev = to_scsi_device(dev); | |
5a3c2be6 | 1602 | struct sbp2_logical_unit *lu; |
14e21986 SR |
1603 | |
1604 | if (!sdev) | |
1605 | return 0; | |
14e21986 | 1606 | |
5a3c2be6 | 1607 | lu = sdev->hostdata; |
14e21986 | 1608 | |
c9755e14 SR |
1609 | return sprintf(buf, "%016llx:%06x:%04x\n", |
1610 | (unsigned long long)lu->tgt->guid, | |
5a3c2be6 | 1611 | lu->tgt->directory_id, lu->lun); |
14e21986 SR |
1612 | } |
1613 | ||
1614 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
1615 | ||
1616 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { | |
1617 | &dev_attr_ieee1394_id, | |
1618 | NULL | |
1619 | }; | |
1620 | ||
9ba136d0 KH |
1621 | static struct scsi_host_template scsi_driver_template = { |
1622 | .module = THIS_MODULE, | |
1623 | .name = "SBP-2 IEEE-1394", | |
0c22ecde | 1624 | .proc_name = "sbp2", |
9ba136d0 | 1625 | .queuecommand = sbp2_scsi_queuecommand, |
cfb01381 | 1626 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1627 | .slave_configure = sbp2_scsi_slave_configure, |
1628 | .eh_abort_handler = sbp2_scsi_abort, | |
1629 | .this_id = -1, | |
1630 | .sg_tablesize = SG_ALL, | |
1631 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1632 | .cmd_per_lun = 1, |
1633 | .can_queue = 1, | |
14e21986 | 1634 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
9ba136d0 KH |
1635 | }; |
1636 | ||
9ba136d0 KH |
1637 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1638 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1639 | MODULE_LICENSE("GPL"); | |
1640 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1641 | ||
1e4c7b0d | 1642 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1e4c7b0d | 1643 | MODULE_ALIAS("sbp2"); |
1e4c7b0d | 1644 | |
9ba136d0 KH |
1645 | static int __init sbp2_init(void) |
1646 | { | |
1647 | return driver_register(&sbp2_driver.driver); | |
1648 | } | |
1649 | ||
1650 | static void __exit sbp2_cleanup(void) | |
1651 | { | |
1652 | driver_unregister(&sbp2_driver.driver); | |
1653 | } | |
1654 | ||
1655 | module_init(sbp2_init); | |
1656 | module_exit(sbp2_cleanup); |