Commit | Line | Data |
---|---|---|
c781c06d KH |
1 | /* |
2 | * SBP2 driver (SCSI over IEEE1394) | |
9ba136d0 | 3 | * |
27a15e50 | 4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
9ba136d0 KH |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
c781c06d KH |
21 | /* |
22 | * The basic structure of this driver is based on the old storage driver, | |
27a15e50 KH |
23 | * drivers/ieee1394/sbp2.c, originally written by |
24 | * James Goodwin <jamesg@filanet.com> | |
25 | * with later contributions and ongoing maintenance from | |
26 | * Ben Collins <bcollins@debian.org>, | |
27 | * Stefan Richter <stefanr@s5r6.in-berlin.de> | |
28 | * and many others. | |
29 | */ | |
30 | ||
7bb6bf7c | 31 | #include <linux/blkdev.h> |
09b12dd4 | 32 | #include <linux/bug.h> |
e8ca9702 | 33 | #include <linux/completion.h> |
7bb6bf7c SR |
34 | #include <linux/delay.h> |
35 | #include <linux/device.h> | |
36 | #include <linux/dma-mapping.h> | |
77c9a5da | 37 | #include <linux/firewire.h> |
e8ca9702 SR |
38 | #include <linux/firewire-constants.h> |
39 | #include <linux/init.h> | |
40 | #include <linux/jiffies.h> | |
9ba136d0 | 41 | #include <linux/kernel.h> |
e8ca9702 SR |
42 | #include <linux/kref.h> |
43 | #include <linux/list.h> | |
7bb6bf7c | 44 | #include <linux/mod_devicetable.h> |
9ba136d0 | 45 | #include <linux/module.h> |
5cd54c94 | 46 | #include <linux/moduleparam.h> |
0b5b2903 | 47 | #include <linux/scatterlist.h> |
e8ca9702 SR |
48 | #include <linux/slab.h> |
49 | #include <linux/spinlock.h> | |
e7cdf237 | 50 | #include <linux/string.h> |
2df222b8 | 51 | #include <linux/stringify.h> |
df8ec249 | 52 | #include <linux/workqueue.h> |
e8ca9702 SR |
53 | |
54 | #include <asm/byteorder.h> | |
b5d2a5e0 | 55 | #include <asm/system.h> |
9ba136d0 KH |
56 | |
57 | #include <scsi/scsi.h> | |
58 | #include <scsi/scsi_cmnd.h> | |
9ba136d0 KH |
59 | #include <scsi/scsi_device.h> |
60 | #include <scsi/scsi_host.h> | |
61 | ||
5cd54c94 SR |
62 | /* |
63 | * So far only bridges from Oxford Semiconductor are known to support | |
64 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
65 | * are possible on OXFW911 and newer Oxsemi bridges. | |
66 | * | |
67 | * Concurrent logins are useful together with cluster filesystems. | |
68 | */ | |
69 | static int sbp2_param_exclusive_login = 1; | |
70 | module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); | |
71 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " | |
72 | "(default = Y, use N for concurrent initiators)"); | |
73 | ||
2df222b8 SR |
74 | /* |
75 | * Flags for firmware oddities | |
76 | * | |
77 | * - 128kB max transfer | |
78 | * Limit transfer size. Necessary for some old bridges. | |
79 | * | |
80 | * - 36 byte inquiry | |
81 | * When scsi_mod probes the device, let the inquiry command look like that | |
82 | * from MS Windows. | |
83 | * | |
84 | * - skip mode page 8 | |
85 | * Suppress sending of mode_sense for mode page 8 if the device pretends to | |
86 | * support the SCSI Primary Block commands instead of Reduced Block Commands. | |
87 | * | |
88 | * - fix capacity | |
89 | * Tell sd_mod to correct the last sector number reported by read_capacity. | |
90 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. | |
91 | * Don't use this with devices which don't have this bug. | |
92 | * | |
9220f194 SR |
93 | * - delay inquiry |
94 | * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry. | |
95 | * | |
ffcaade3 SR |
96 | * - power condition |
97 | * Set the power condition field in the START STOP UNIT commands sent by | |
98 | * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on). | |
99 | * Some disks need this to spin down or to resume properly. | |
100 | * | |
2df222b8 SR |
101 | * - override internal blacklist |
102 | * Instead of adding to the built-in blacklist, use only the workarounds | |
103 | * specified in the module load parameter. | |
104 | * Useful if a blacklist entry interfered with a non-broken device. | |
105 | */ | |
106 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 | |
107 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 | |
108 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 | |
109 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 | |
9220f194 SR |
110 | #define SBP2_WORKAROUND_DELAY_INQUIRY 0x10 |
111 | #define SBP2_INQUIRY_DELAY 12 | |
ffcaade3 | 112 | #define SBP2_WORKAROUND_POWER_CONDITION 0x20 |
2df222b8 SR |
113 | #define SBP2_WORKAROUND_OVERRIDE 0x100 |
114 | ||
115 | static int sbp2_param_workarounds; | |
116 | module_param_named(workarounds, sbp2_param_workarounds, int, 0644); | |
117 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
118 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
119 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
120 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
121 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) | |
9220f194 | 122 | ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY) |
ffcaade3 SR |
123 | ", set power condition in start stop unit = " |
124 | __stringify(SBP2_WORKAROUND_POWER_CONDITION) | |
2df222b8 SR |
125 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
126 | ", or a combination)"); | |
127 | ||
9ba136d0 KH |
128 | static const char sbp2_driver_name[] = "sbp2"; |
129 | ||
5a3c2be6 SR |
130 | /* |
131 | * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry | |
132 | * and one struct scsi_device per sbp2_logical_unit. | |
133 | */ | |
134 | struct sbp2_logical_unit { | |
135 | struct sbp2_target *tgt; | |
136 | struct list_head link; | |
9ba136d0 KH |
137 | struct fw_address_handler address_handler; |
138 | struct list_head orb_list; | |
5a3c2be6 | 139 | |
9ba136d0 | 140 | u64 command_block_agent_address; |
5a3c2be6 | 141 | u16 lun; |
9ba136d0 KH |
142 | int login_id; |
143 | ||
c781c06d | 144 | /* |
5a3c2be6 SR |
145 | * The generation is updated once we've logged in or reconnected |
146 | * to the logical unit. Thus, I/O to the device will automatically | |
147 | * fail and get retried if it happens in a window where the device | |
148 | * is not ready, e.g. after a bus reset but before we reconnect. | |
c781c06d | 149 | */ |
9ba136d0 | 150 | int generation; |
7f37c426 KH |
151 | int retries; |
152 | struct delayed_work work; | |
f8436158 | 153 | bool has_sdev; |
2e2705bd | 154 | bool blocked; |
9ba136d0 KH |
155 | }; |
156 | ||
5a3c2be6 SR |
157 | /* |
158 | * We create one struct sbp2_target per IEEE 1212 Unit Directory | |
159 | * and one struct Scsi_Host per sbp2_target. | |
160 | */ | |
161 | struct sbp2_target { | |
162 | struct kref kref; | |
163 | struct fw_unit *unit; | |
48f18c76 | 164 | const char *bus_id; |
05cca738 | 165 | struct list_head lu_list; |
5a3c2be6 SR |
166 | |
167 | u64 management_agent_address; | |
c9755e14 | 168 | u64 guid; |
5a3c2be6 SR |
169 | int directory_id; |
170 | int node_id; | |
171 | int address_high; | |
05cca738 | 172 | unsigned int workarounds; |
384170da | 173 | unsigned int mgt_orb_timeout; |
a08e100a | 174 | unsigned int max_payload; |
2e2705bd SR |
175 | |
176 | int dont_block; /* counter for each logical unit */ | |
177 | int blocked; /* ditto */ | |
5a3c2be6 SR |
178 | }; |
179 | ||
e5110d01 SR |
180 | static struct fw_device *target_device(struct sbp2_target *tgt) |
181 | { | |
182 | return fw_parent_device(tgt->unit); | |
183 | } | |
184 | ||
cd1f70fd JF |
185 | /* Impossible login_id, to detect logout attempt before successful login */ |
186 | #define INVALID_LOGIN_ID 0x10000 | |
187 | ||
eaf76e0d | 188 | #define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */ |
9ba136d0 | 189 | #define SBP2_ORB_NULL 0x80000000 |
17cff9ff JW |
190 | #define SBP2_RETRY_LIMIT 0xf /* 15 retries */ |
191 | #define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */ | |
9ba136d0 | 192 | |
af271941 SR |
193 | /* |
194 | * There is no transport protocol limit to the CDB length, but we implement | |
195 | * a fixed length only. 16 bytes is enough for disks larger than 2 TB. | |
196 | */ | |
197 | #define SBP2_MAX_CDB_SIZE 16 | |
198 | ||
09b12dd4 SR |
199 | /* |
200 | * The default maximum s/g segment size of a FireWire controller is | |
201 | * usually 0x10000, but SBP-2 only allows 0xffff. Since buffers have to | |
202 | * be quadlet-aligned, we set the length limit to 0xffff & ~3. | |
203 | */ | |
204 | #define SBP2_MAX_SEG_SIZE 0xfffc | |
205 | ||
9ba136d0 | 206 | /* Unit directory keys */ |
384170da | 207 | #define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a |
5a3c2be6 SR |
208 | #define SBP2_CSR_FIRMWARE_REVISION 0x3c |
209 | #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 | |
210 | #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 | |
9ba136d0 | 211 | |
9ba136d0 KH |
212 | /* Management orb opcodes */ |
213 | #define SBP2_LOGIN_REQUEST 0x0 | |
214 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
215 | #define SBP2_RECONNECT_REQUEST 0x3 | |
216 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
217 | #define SBP2_LOGOUT_REQUEST 0x7 | |
218 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
219 | #define SBP2_ABORT_TASK_SET 0xc | |
220 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
221 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
222 | ||
223 | /* Offsets for command block agent registers */ | |
224 | #define SBP2_AGENT_STATE 0x00 | |
225 | #define SBP2_AGENT_RESET 0x04 | |
226 | #define SBP2_ORB_POINTER 0x08 | |
227 | #define SBP2_DOORBELL 0x10 | |
228 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
229 | ||
230 | /* Status write response codes */ | |
231 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
232 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
233 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
234 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
235 | ||
a77754a7 KH |
236 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
237 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) | |
238 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) | |
239 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) | |
240 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) | |
241 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) | |
242 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) | |
243 | #define STATUS_GET_DATA(v) ((v).data) | |
9ba136d0 KH |
244 | |
245 | struct sbp2_status { | |
246 | u32 status; | |
247 | u32 orb_low; | |
248 | u8 data[24]; | |
249 | }; | |
250 | ||
251 | struct sbp2_pointer { | |
71ee9f01 SR |
252 | __be32 high; |
253 | __be32 low; | |
9ba136d0 KH |
254 | }; |
255 | ||
256 | struct sbp2_orb { | |
257 | struct fw_transaction t; | |
e57d2011 | 258 | struct kref kref; |
9ba136d0 KH |
259 | dma_addr_t request_bus; |
260 | int rcode; | |
a98e2719 | 261 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
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; | |
5a3c2be6 | 313 | struct sbp2_logical_unit *lu; |
9ba136d0 | 314 | |
9fb2dd12 | 315 | struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); |
9ba136d0 | 316 | dma_addr_t page_table_bus; |
9ba136d0 KH |
317 | }; |
318 | ||
f746072a SR |
319 | #define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */ |
320 | #define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */ | |
321 | ||
9ba136d0 KH |
322 | /* |
323 | * List of devices with known bugs. | |
324 | * | |
325 | * The firmware_revision field, masked with 0xffff00, is the best | |
326 | * indicator for the type of bridge chip of a device. It yields a few | |
327 | * false positives but this did not break correctly behaving devices | |
f746072a | 328 | * so far. |
9ba136d0 KH |
329 | */ |
330 | static const struct { | |
331 | u32 firmware_revision; | |
332 | u32 model; | |
05cca738 | 333 | unsigned int workarounds; |
9ba136d0 KH |
334 | } sbp2_workarounds_table[] = { |
335 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
336 | .firmware_revision = 0x002800, | |
337 | .model = 0x001010, | |
338 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
ffcaade3 SR |
339 | SBP2_WORKAROUND_MODE_SENSE_8 | |
340 | SBP2_WORKAROUND_POWER_CONDITION, | |
9ba136d0 | 341 | }, |
9220f194 SR |
342 | /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { |
343 | .firmware_revision = 0x002800, | |
344 | .model = 0x000000, | |
3c5f8035 | 345 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
9220f194 | 346 | }, |
9ba136d0 KH |
347 | /* Initio bridges, actually only needed for some older ones */ { |
348 | .firmware_revision = 0x000200, | |
f746072a | 349 | .model = SBP2_ROM_VALUE_WILDCARD, |
9ba136d0 KH |
350 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
351 | }, | |
ffcaade3 SR |
352 | /* PL-3507 bridge with Prolific firmware */ { |
353 | .firmware_revision = 0x012800, | |
f746072a | 354 | .model = SBP2_ROM_VALUE_WILDCARD, |
ffcaade3 SR |
355 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
356 | }, | |
9ba136d0 KH |
357 | /* Symbios bridge */ { |
358 | .firmware_revision = 0xa0b800, | |
f746072a | 359 | .model = SBP2_ROM_VALUE_WILDCARD, |
9ba136d0 KH |
360 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
361 | }, | |
2aa9ff7f SR |
362 | /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ { |
363 | .firmware_revision = 0x002600, | |
f746072a | 364 | .model = SBP2_ROM_VALUE_WILDCARD, |
2aa9ff7f SR |
365 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
366 | }, | |
c781c06d | 367 | /* |
c8c4707c SR |
368 | * iPod 2nd generation: needs 128k max transfer size workaround |
369 | * iPod 3rd generation: needs fix capacity workaround | |
c781c06d | 370 | */ |
c8c4707c SR |
371 | { |
372 | .firmware_revision = 0x0a2700, | |
373 | .model = 0x000000, | |
374 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS | | |
375 | SBP2_WORKAROUND_FIX_CAPACITY, | |
376 | }, | |
377 | /* iPod 4th generation */ { | |
9ba136d0 KH |
378 | .firmware_revision = 0x0a2700, |
379 | .model = 0x000021, | |
380 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
381 | }, | |
031bb27c SR |
382 | /* iPod mini */ { |
383 | .firmware_revision = 0x0a2700, | |
384 | .model = 0x000022, | |
385 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
386 | }, | |
9ba136d0 KH |
387 | /* iPod mini */ { |
388 | .firmware_revision = 0x0a2700, | |
389 | .model = 0x000023, | |
390 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
391 | }, | |
392 | /* iPod Photo */ { | |
393 | .firmware_revision = 0x0a2700, | |
394 | .model = 0x00007e, | |
395 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
396 | } | |
397 | }; | |
398 | ||
53dca511 | 399 | static void free_orb(struct kref *kref) |
e57d2011 KH |
400 | { |
401 | struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); | |
402 | ||
403 | kfree(orb); | |
404 | } | |
405 | ||
53dca511 SR |
406 | static void sbp2_status_write(struct fw_card *card, struct fw_request *request, |
407 | int tcode, int destination, int source, | |
33e553fe | 408 | int generation, unsigned long long offset, |
53dca511 | 409 | void *payload, size_t length, void *callback_data) |
9ba136d0 | 410 | { |
5a3c2be6 | 411 | struct sbp2_logical_unit *lu = callback_data; |
9ba136d0 KH |
412 | struct sbp2_orb *orb; |
413 | struct sbp2_status status; | |
9ba136d0 KH |
414 | unsigned long flags; |
415 | ||
416 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
094614fc | 417 | length < 8 || length > sizeof(status)) { |
9ba136d0 KH |
418 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
419 | return; | |
420 | } | |
421 | ||
094614fc SR |
422 | status.status = be32_to_cpup(payload); |
423 | status.orb_low = be32_to_cpup(payload + 4); | |
424 | memset(status.data, 0, sizeof(status.data)); | |
425 | if (length > 8) | |
426 | memcpy(status.data, payload + 8, length - 8); | |
427 | ||
a77754a7 | 428 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
9ba136d0 KH |
429 | fw_notify("non-orb related status write, not handled\n"); |
430 | fw_send_response(card, request, RCODE_COMPLETE); | |
431 | return; | |
432 | } | |
433 | ||
434 | /* Lookup the orb corresponding to this status write. */ | |
435 | spin_lock_irqsave(&card->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 | } | |
444 | spin_unlock_irqrestore(&card->lock, flags); | |
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 { |
9ba136d0 | 450 | fw_error("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 | */ | |
471 | spin_lock_irqsave(&card->lock, flags); | |
472 | ||
473 | if (orb->rcode == -1) | |
474 | orb->rcode = rcode; | |
7a4e1e9c | 475 | if (orb->rcode != RCODE_COMPLETE) { |
9ba136d0 | 476 | list_del(&orb->link); |
1b34e974 | 477 | spin_unlock_irqrestore(&card->lock, flags); |
6c74340b | 478 | |
9ba136d0 | 479 | orb->callback(orb, NULL); |
6c74340b | 480 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
1b34e974 SR |
481 | } else { |
482 | spin_unlock_irqrestore(&card->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 | { |
e5110d01 | 491 | struct fw_device *device = target_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 KH |
497 | |
498 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 499 | list_add_tail(&orb->link, &lu->orb_list); |
9ba136d0 KH |
500 | spin_unlock_irqrestore(&device->card->lock, flags); |
501 | ||
6c74340b SR |
502 | kref_get(&orb->kref); /* transaction callback reference */ |
503 | kref_get(&orb->kref); /* orb callback reference */ | |
e57d2011 | 504 | |
9ba136d0 | 505 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
f1397490 | 506 | node_id, generation, device->max_speed, offset, |
81bf52d8 | 507 | &orb_pointer, 8, complete_transaction, orb); |
9ba136d0 KH |
508 | } |
509 | ||
5a3c2be6 | 510 | static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |
9ba136d0 | 511 | { |
e5110d01 | 512 | struct fw_device *device = target_device(lu->tgt); |
9ba136d0 KH |
513 | struct sbp2_orb *orb, *next; |
514 | struct list_head list; | |
515 | unsigned long flags; | |
2aaad97b | 516 | int retval = -ENOENT; |
9ba136d0 KH |
517 | |
518 | INIT_LIST_HEAD(&list); | |
519 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 520 | list_splice_init(&lu->orb_list, &list); |
9ba136d0 KH |
521 | spin_unlock_irqrestore(&device->card->lock, flags); |
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 | { |
e5110d01 | 551 | struct fw_device *device = target_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 | ||
2d826cc5 | 559 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
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) { |
48f18c76 SR |
611 | fw_error("%s: orb reply timed out, rcode=0x%02x\n", |
612 | lu->tgt->bus_id, orb->base.rcode); | |
9ba136d0 KH |
613 | goto out; |
614 | } | |
615 | ||
2aaad97b | 616 | if (orb->base.rcode != RCODE_COMPLETE) { |
48f18c76 SR |
617 | fw_error("%s: management write failed, rcode 0x%02x\n", |
618 | lu->tgt->bus_id, 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) { | |
48f18c76 | 624 | fw_error("%s: error status: %d:%d\n", lu->tgt->bus_id, |
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 | { | |
e5110d01 | 647 | struct fw_device *device = target_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 | { |
e5110d01 | 664 | struct fw_device *device = target_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 | ||
2e2705bd SR |
678 | static inline void sbp2_allow_block(struct sbp2_logical_unit *lu) |
679 | { | |
680 | /* | |
681 | * We may access dont_block without taking card->lock here: | |
682 | * All callers of sbp2_allow_block() and all callers of sbp2_unblock() | |
683 | * are currently serialized against each other. | |
684 | * And a wrong result in sbp2_conditionally_block()'s access of | |
685 | * dont_block is rather harmless, it simply misses its first chance. | |
686 | */ | |
687 | --lu->tgt->dont_block; | |
688 | } | |
689 | ||
690 | /* | |
691 | * Blocks lu->tgt if all of the following conditions are met: | |
692 | * - Login, INQUIRY, and high-level SCSI setup of all of the target's | |
693 | * logical units have been finished (indicated by dont_block == 0). | |
694 | * - lu->generation is stale. | |
695 | * | |
696 | * Note, scsi_block_requests() must be called while holding card->lock, | |
697 | * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to | |
698 | * unblock the target. | |
699 | */ | |
700 | static void sbp2_conditionally_block(struct sbp2_logical_unit *lu) | |
701 | { | |
702 | struct sbp2_target *tgt = lu->tgt; | |
e5110d01 | 703 | struct fw_card *card = target_device(tgt)->card; |
2e2705bd SR |
704 | struct Scsi_Host *shost = |
705 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
706 | unsigned long flags; | |
707 | ||
708 | spin_lock_irqsave(&card->lock, flags); | |
709 | if (!tgt->dont_block && !lu->blocked && | |
710 | lu->generation != card->generation) { | |
711 | lu->blocked = true; | |
a5fd9ec7 | 712 | if (++tgt->blocked == 1) |
2e2705bd | 713 | scsi_block_requests(shost); |
2e2705bd SR |
714 | } |
715 | spin_unlock_irqrestore(&card->lock, flags); | |
716 | } | |
717 | ||
718 | /* | |
719 | * Unblocks lu->tgt as soon as all its logical units can be unblocked. | |
720 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
721 | * card->lock protected section. On the other hand, running it inside | |
722 | * the section might clash with shost->host_lock. | |
723 | */ | |
724 | static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu) | |
725 | { | |
726 | struct sbp2_target *tgt = lu->tgt; | |
e5110d01 | 727 | struct fw_card *card = target_device(tgt)->card; |
2e2705bd SR |
728 | struct Scsi_Host *shost = |
729 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
730 | unsigned long flags; | |
731 | bool unblock = false; | |
732 | ||
733 | spin_lock_irqsave(&card->lock, flags); | |
734 | if (lu->blocked && lu->generation == card->generation) { | |
735 | lu->blocked = false; | |
736 | unblock = --tgt->blocked == 0; | |
737 | } | |
738 | spin_unlock_irqrestore(&card->lock, flags); | |
739 | ||
a5fd9ec7 | 740 | if (unblock) |
2e2705bd | 741 | scsi_unblock_requests(shost); |
2e2705bd SR |
742 | } |
743 | ||
744 | /* | |
745 | * Prevents future blocking of tgt and unblocks it. | |
746 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
747 | * card->lock protected section. On the other hand, running it inside | |
748 | * the section might clash with shost->host_lock. | |
749 | */ | |
750 | static void sbp2_unblock(struct sbp2_target *tgt) | |
751 | { | |
e5110d01 | 752 | struct fw_card *card = target_device(tgt)->card; |
2e2705bd SR |
753 | struct Scsi_Host *shost = |
754 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
755 | unsigned long flags; | |
756 | ||
757 | spin_lock_irqsave(&card->lock, flags); | |
758 | ++tgt->dont_block; | |
759 | spin_unlock_irqrestore(&card->lock, flags); | |
760 | ||
761 | scsi_unblock_requests(shost); | |
762 | } | |
763 | ||
f8436158 SR |
764 | static int sbp2_lun2int(u16 lun) |
765 | { | |
766 | struct scsi_lun eight_bytes_lun; | |
767 | ||
768 | memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); | |
769 | eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff; | |
770 | eight_bytes_lun.scsi_lun[1] = lun & 0xff; | |
771 | ||
772 | return scsilun_to_int(&eight_bytes_lun); | |
773 | } | |
774 | ||
5a3c2be6 | 775 | static void sbp2_release_target(struct kref *kref) |
b3d6e151 | 776 | { |
5a3c2be6 SR |
777 | struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref); |
778 | struct sbp2_logical_unit *lu, *next; | |
779 | struct Scsi_Host *shost = | |
780 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
f8436158 | 781 | struct scsi_device *sdev; |
e5110d01 | 782 | struct fw_device *device = target_device(tgt); |
5a3c2be6 | 783 | |
2e2705bd SR |
784 | /* prevent deadlocks */ |
785 | sbp2_unblock(tgt); | |
786 | ||
5a3c2be6 | 787 | list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { |
f8436158 SR |
788 | sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun)); |
789 | if (sdev) { | |
790 | scsi_remove_device(sdev); | |
791 | scsi_device_put(sdev); | |
33f1c6c3 | 792 | } |
cd1f70fd JF |
793 | if (lu->login_id != INVALID_LOGIN_ID) { |
794 | int generation, node_id; | |
795 | /* | |
796 | * tgt->node_id may be obsolete here if we failed | |
797 | * during initial login or after a bus reset where | |
798 | * the topology changed. | |
799 | */ | |
800 | generation = device->generation; | |
801 | smp_rmb(); /* node_id vs. generation */ | |
802 | node_id = device->node_id; | |
803 | sbp2_send_management_orb(lu, node_id, generation, | |
804 | SBP2_LOGOUT_REQUEST, | |
805 | lu->login_id, NULL); | |
806 | } | |
5a3c2be6 SR |
807 | fw_core_remove_address_handler(&lu->address_handler); |
808 | list_del(&lu->link); | |
809 | kfree(lu); | |
810 | } | |
811 | scsi_remove_host(shost); | |
f32ddadd | 812 | fw_notify("released %s, target %d:0:0\n", tgt->bus_id, shost->host_no); |
5a3c2be6 | 813 | |
1dc3bea7 | 814 | fw_unit_put(tgt->unit); |
5a3c2be6 | 815 | scsi_host_put(shost); |
855c603d | 816 | fw_device_put(device); |
b3d6e151 KH |
817 | } |
818 | ||
9fb551bf SR |
819 | static void sbp2_target_get(struct sbp2_target *tgt) |
820 | { | |
821 | kref_get(&tgt->kref); | |
822 | } | |
df8ec249 | 823 | |
cd1f70fd JF |
824 | static void sbp2_target_put(struct sbp2_target *tgt) |
825 | { | |
826 | kref_put(&tgt->kref, sbp2_release_target); | |
827 | } | |
828 | ||
9fb551bf SR |
829 | static struct workqueue_struct *sbp2_wq; |
830 | ||
285838eb SR |
831 | /* |
832 | * Always get the target's kref when scheduling work on one its units. | |
833 | * Each workqueue job is responsible to call sbp2_target_put() upon return. | |
834 | */ | |
835 | static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay) | |
836 | { | |
9fb551bf | 837 | sbp2_target_get(lu->tgt); |
cd1f70fd JF |
838 | if (!queue_delayed_work(sbp2_wq, &lu->work, delay)) |
839 | sbp2_target_put(lu->tgt); | |
285838eb SR |
840 | } |
841 | ||
17cff9ff JW |
842 | /* |
843 | * Write retransmit retry values into the BUSY_TIMEOUT register. | |
844 | * - The single-phase retry protocol is supported by all SBP-2 devices, but the | |
845 | * default retry_limit value is 0 (i.e. never retry transmission). We write a | |
846 | * saner value after logging into the device. | |
847 | * - The dual-phase retry protocol is optional to implement, and if not | |
848 | * supported, writes to the dual-phase portion of the register will be | |
849 | * ignored. We try to write the original 1394-1995 default here. | |
850 | * - In the case of devices that are also SBP-3-compliant, all writes are | |
851 | * ignored, as the register is read-only, but contains single-phase retry of | |
852 | * 15, which is what we're trying to set for all SBP-2 device anyway, so this | |
853 | * write attempt is safe and yields more consistent behavior for all devices. | |
854 | * | |
855 | * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec, | |
856 | * and section 6.4 of the SBP-3 spec for further details. | |
857 | */ | |
51f9dbef JW |
858 | static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu) |
859 | { | |
e5110d01 | 860 | struct fw_device *device = target_device(lu->tgt); |
1e119fa9 | 861 | __be32 d = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT); |
51f9dbef | 862 | |
1e119fa9 JF |
863 | fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, |
864 | lu->tgt->node_id, lu->generation, device->max_speed, | |
e847cc83 | 865 | CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT, &d, 4); |
51f9dbef JW |
866 | } |
867 | ||
5a3c2be6 SR |
868 | static void sbp2_reconnect(struct work_struct *work); |
869 | ||
7f37c426 KH |
870 | static void sbp2_login(struct work_struct *work) |
871 | { | |
5a3c2be6 SR |
872 | struct sbp2_logical_unit *lu = |
873 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 | 874 | struct sbp2_target *tgt = lu->tgt; |
e5110d01 | 875 | struct fw_device *device = target_device(tgt); |
48f18c76 | 876 | struct Scsi_Host *shost; |
5a3c2be6 | 877 | struct scsi_device *sdev; |
7f37c426 | 878 | struct sbp2_login_response response; |
5a3c2be6 | 879 | int generation, node_id, local_node_id; |
7f37c426 | 880 | |
be6f48b0 SR |
881 | if (fw_device_is_shutdown(device)) |
882 | goto out; | |
883 | ||
5a8a1bcd | 884 | generation = device->generation; |
621f6dd7 | 885 | smp_rmb(); /* node IDs must not be older than generation */ |
5a8a1bcd SR |
886 | node_id = device->node_id; |
887 | local_node_id = device->card->node_id; | |
7f37c426 | 888 | |
ce896d95 | 889 | /* If this is a re-login attempt, log out, or we might be rejected. */ |
f8436158 | 890 | if (lu->has_sdev) |
ce896d95 SR |
891 | sbp2_send_management_orb(lu, device->node_id, generation, |
892 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
893 | ||
5a3c2be6 SR |
894 | if (sbp2_send_management_orb(lu, node_id, generation, |
895 | SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { | |
2e2705bd | 896 | if (lu->retries++ < 5) { |
285838eb | 897 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
2e2705bd | 898 | } else { |
48f18c76 SR |
899 | fw_error("%s: failed to login to LUN %04x\n", |
900 | tgt->bus_id, lu->lun); | |
2e2705bd SR |
901 | /* Let any waiting I/O fail from now on. */ |
902 | sbp2_unblock(lu->tgt); | |
903 | } | |
285838eb | 904 | goto out; |
7f37c426 KH |
905 | } |
906 | ||
48f18c76 SR |
907 | tgt->node_id = node_id; |
908 | tgt->address_high = local_node_id << 16; | |
621f6dd7 SR |
909 | smp_wmb(); /* node IDs must not be older than generation */ |
910 | lu->generation = generation; | |
7f37c426 | 911 | |
5a3c2be6 | 912 | lu->command_block_agent_address = |
71ee9f01 SR |
913 | ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff) |
914 | << 32) | be32_to_cpu(response.command_block_agent.low); | |
915 | lu->login_id = be32_to_cpu(response.misc) & 0xffff; | |
7f37c426 | 916 | |
48f18c76 SR |
917 | fw_notify("%s: logged in to LUN %04x (%d retries)\n", |
918 | tgt->bus_id, lu->lun, lu->retries); | |
7f37c426 | 919 | |
51f9dbef JW |
920 | /* set appropriate retry limit(s) in BUSY_TIMEOUT register */ |
921 | sbp2_set_busy_timeout(lu); | |
7f37c426 | 922 | |
5a3c2be6 SR |
923 | PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect); |
924 | sbp2_agent_reset(lu); | |
925 | ||
0fa6dfdb | 926 | /* This was a re-login. */ |
f8436158 | 927 | if (lu->has_sdev) { |
0fa6dfdb | 928 | sbp2_cancel_orbs(lu); |
2e2705bd | 929 | sbp2_conditionally_unblock(lu); |
0fa6dfdb SR |
930 | goto out; |
931 | } | |
932 | ||
9220f194 SR |
933 | if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) |
934 | ssleep(SBP2_INQUIRY_DELAY); | |
935 | ||
48f18c76 | 936 | shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
f8436158 | 937 | sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu); |
e80de370 SR |
938 | /* |
939 | * FIXME: We are unable to perform reconnects while in sbp2_login(). | |
940 | * Therefore __scsi_add_device() will get into trouble if a bus reset | |
941 | * happens in parallel. It will either fail or leave us with an | |
942 | * unusable sdev. As a workaround we check for this and retry the | |
943 | * whole login and SCSI probing. | |
944 | */ | |
1b9c12ba | 945 | |
e80de370 SR |
946 | /* Reported error during __scsi_add_device() */ |
947 | if (IS_ERR(sdev)) | |
948 | goto out_logout_login; | |
949 | ||
e80de370 SR |
950 | /* Unreported error during __scsi_add_device() */ |
951 | smp_rmb(); /* get current card generation */ | |
952 | if (generation != device->card->generation) { | |
953 | scsi_remove_device(sdev); | |
33f1c6c3 | 954 | scsi_device_put(sdev); |
e80de370 | 955 | goto out_logout_login; |
7f37c426 | 956 | } |
e80de370 SR |
957 | |
958 | /* No error during __scsi_add_device() */ | |
f8436158 SR |
959 | lu->has_sdev = true; |
960 | scsi_device_put(sdev); | |
2e2705bd | 961 | sbp2_allow_block(lu); |
e80de370 SR |
962 | goto out; |
963 | ||
964 | out_logout_login: | |
965 | smp_rmb(); /* generation may have changed */ | |
966 | generation = device->generation; | |
967 | smp_rmb(); /* node_id must not be older than generation */ | |
968 | ||
969 | sbp2_send_management_orb(lu, device->node_id, generation, | |
970 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
971 | /* | |
972 | * If a bus reset happened, sbp2_update will have requeued | |
973 | * lu->work already. Reset the work from reconnect to login. | |
974 | */ | |
975 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); | |
285838eb | 976 | out: |
48f18c76 | 977 | sbp2_target_put(tgt); |
7f37c426 | 978 | } |
9ba136d0 | 979 | |
5a3c2be6 | 980 | static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) |
9ba136d0 | 981 | { |
5a3c2be6 | 982 | struct sbp2_logical_unit *lu; |
9ba136d0 | 983 | |
5a3c2be6 SR |
984 | lu = kmalloc(sizeof(*lu), GFP_KERNEL); |
985 | if (!lu) | |
986 | return -ENOMEM; | |
9ba136d0 | 987 | |
5a3c2be6 SR |
988 | lu->address_handler.length = 0x100; |
989 | lu->address_handler.address_callback = sbp2_status_write; | |
990 | lu->address_handler.callback_data = lu; | |
9ba136d0 | 991 | |
5a3c2be6 SR |
992 | if (fw_core_add_address_handler(&lu->address_handler, |
993 | &fw_high_memory_region) < 0) { | |
994 | kfree(lu); | |
995 | return -ENOMEM; | |
996 | } | |
9ba136d0 | 997 | |
f8436158 SR |
998 | lu->tgt = tgt; |
999 | lu->lun = lun_entry & 0xffff; | |
cd1f70fd | 1000 | lu->login_id = INVALID_LOGIN_ID; |
f8436158 SR |
1001 | lu->retries = 0; |
1002 | lu->has_sdev = false; | |
1003 | lu->blocked = false; | |
2e2705bd | 1004 | ++tgt->dont_block; |
5a3c2be6 SR |
1005 | INIT_LIST_HEAD(&lu->orb_list); |
1006 | INIT_DELAYED_WORK(&lu->work, sbp2_login); | |
9ba136d0 | 1007 | |
5a3c2be6 SR |
1008 | list_add_tail(&lu->link, &tgt->lu_list); |
1009 | return 0; | |
1010 | } | |
ad85274f | 1011 | |
13b302d0 SR |
1012 | static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, |
1013 | const u32 *directory) | |
5a3c2be6 SR |
1014 | { |
1015 | struct fw_csr_iterator ci; | |
1016 | int key, value; | |
9ba136d0 | 1017 | |
5a3c2be6 SR |
1018 | fw_csr_iterator_init(&ci, directory); |
1019 | while (fw_csr_iterator_next(&ci, &key, &value)) | |
1020 | if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && | |
1021 | sbp2_add_logical_unit(tgt, value) < 0) | |
1022 | return -ENOMEM; | |
1023 | return 0; | |
1024 | } | |
1025 | ||
13b302d0 | 1026 | static int sbp2_scan_unit_dir(struct sbp2_target *tgt, const u32 *directory, |
5a3c2be6 SR |
1027 | u32 *model, u32 *firmware_revision) |
1028 | { | |
1029 | struct fw_csr_iterator ci; | |
1030 | int key, value; | |
1031 | ||
1032 | fw_csr_iterator_init(&ci, directory); | |
9ba136d0 KH |
1033 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
1034 | switch (key) { | |
5a3c2be6 | 1035 | |
9ba136d0 | 1036 | case CSR_DEPENDENT_INFO | CSR_OFFSET: |
5a3c2be6 SR |
1037 | tgt->management_agent_address = |
1038 | CSR_REGISTER_BASE + 4 * value; | |
9ba136d0 | 1039 | break; |
5a3c2be6 SR |
1040 | |
1041 | case CSR_DIRECTORY_ID: | |
1042 | tgt->directory_id = value; | |
9ba136d0 | 1043 | break; |
5a3c2be6 | 1044 | |
9ba136d0 | 1045 | case CSR_MODEL: |
5a3c2be6 SR |
1046 | *model = value; |
1047 | break; | |
1048 | ||
1049 | case SBP2_CSR_FIRMWARE_REVISION: | |
1050 | *firmware_revision = value; | |
1051 | break; | |
1052 | ||
384170da JW |
1053 | case SBP2_CSR_UNIT_CHARACTERISTICS: |
1054 | /* the timeout value is stored in 500ms units */ | |
eaf76e0d | 1055 | tgt->mgt_orb_timeout = (value >> 8 & 0xff) * 500; |
384170da JW |
1056 | break; |
1057 | ||
5a3c2be6 SR |
1058 | case SBP2_CSR_LOGICAL_UNIT_NUMBER: |
1059 | if (sbp2_add_logical_unit(tgt, value) < 0) | |
1060 | return -ENOMEM; | |
1061 | break; | |
1062 | ||
1063 | case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: | |
0e3e2eab RS |
1064 | /* Adjust for the increment in the iterator */ |
1065 | if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0) | |
5a3c2be6 | 1066 | return -ENOMEM; |
9ba136d0 KH |
1067 | break; |
1068 | } | |
1069 | } | |
5a3c2be6 SR |
1070 | return 0; |
1071 | } | |
1072 | ||
eaf76e0d SR |
1073 | /* |
1074 | * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be | |
1075 | * provided in the config rom. Most devices do provide a value, which | |
1076 | * we'll use for login management orbs, but with some sane limits. | |
1077 | */ | |
1078 | static void sbp2_clamp_management_orb_timeout(struct sbp2_target *tgt) | |
1079 | { | |
1080 | unsigned int timeout = tgt->mgt_orb_timeout; | |
1081 | ||
1082 | if (timeout > 40000) | |
1083 | fw_notify("%s: %ds mgt_ORB_timeout limited to 40s\n", | |
1084 | tgt->bus_id, timeout / 1000); | |
1085 | ||
1086 | tgt->mgt_orb_timeout = clamp_val(timeout, 5000, 40000); | |
1087 | } | |
1088 | ||
5a3c2be6 SR |
1089 | static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, |
1090 | u32 firmware_revision) | |
1091 | { | |
1092 | int i; | |
05cca738 | 1093 | unsigned int w = sbp2_param_workarounds; |
2df222b8 SR |
1094 | |
1095 | if (w) | |
1096 | fw_notify("Please notify linux1394-devel@lists.sourceforge.net " | |
1097 | "if you need the workarounds parameter for %s\n", | |
48f18c76 | 1098 | tgt->bus_id); |
5a3c2be6 | 1099 | |
2df222b8 SR |
1100 | if (w & SBP2_WORKAROUND_OVERRIDE) |
1101 | goto out; | |
9ba136d0 KH |
1102 | |
1103 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
5a3c2be6 | 1104 | |
9ba136d0 KH |
1105 | if (sbp2_workarounds_table[i].firmware_revision != |
1106 | (firmware_revision & 0xffffff00)) | |
1107 | continue; | |
5a3c2be6 | 1108 | |
9ba136d0 | 1109 | if (sbp2_workarounds_table[i].model != model && |
f746072a | 1110 | sbp2_workarounds_table[i].model != SBP2_ROM_VALUE_WILDCARD) |
9ba136d0 | 1111 | continue; |
5a3c2be6 | 1112 | |
2df222b8 | 1113 | w |= sbp2_workarounds_table[i].workarounds; |
9ba136d0 KH |
1114 | break; |
1115 | } | |
2df222b8 SR |
1116 | out: |
1117 | if (w) | |
5a3c2be6 | 1118 | fw_notify("Workarounds for %s: 0x%x " |
9ba136d0 | 1119 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", |
48f18c76 | 1120 | tgt->bus_id, w, firmware_revision, model); |
2df222b8 | 1121 | tgt->workarounds = w; |
5a3c2be6 SR |
1122 | } |
1123 | ||
1124 | static struct scsi_host_template scsi_driver_template; | |
1125 | ||
1126 | static int sbp2_probe(struct device *dev) | |
1127 | { | |
1128 | struct fw_unit *unit = fw_unit(dev); | |
e5110d01 | 1129 | struct fw_device *device = fw_parent_device(unit); |
5a3c2be6 SR |
1130 | struct sbp2_target *tgt; |
1131 | struct sbp2_logical_unit *lu; | |
1132 | struct Scsi_Host *shost; | |
1133 | u32 model, firmware_revision; | |
1134 | ||
09b12dd4 SR |
1135 | if (dma_get_max_seg_size(device->card->device) > SBP2_MAX_SEG_SIZE) |
1136 | BUG_ON(dma_set_max_seg_size(device->card->device, | |
1137 | SBP2_MAX_SEG_SIZE)); | |
1138 | ||
5a3c2be6 SR |
1139 | shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); |
1140 | if (shost == NULL) | |
1141 | return -ENOMEM; | |
1142 | ||
1143 | tgt = (struct sbp2_target *)shost->hostdata; | |
d961450d | 1144 | dev_set_drvdata(&unit->device, tgt); |
5a3c2be6 SR |
1145 | tgt->unit = unit; |
1146 | kref_init(&tgt->kref); | |
1147 | INIT_LIST_HEAD(&tgt->lu_list); | |
a1f64819 | 1148 | tgt->bus_id = dev_name(&unit->device); |
c9755e14 | 1149 | tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; |
5a3c2be6 SR |
1150 | |
1151 | if (fw_device_enable_phys_dma(device) < 0) | |
1152 | goto fail_shost_put; | |
1153 | ||
af271941 SR |
1154 | shost->max_cmd_len = SBP2_MAX_CDB_SIZE; |
1155 | ||
5a3c2be6 SR |
1156 | if (scsi_add_host(shost, &unit->device) < 0) |
1157 | goto fail_shost_put; | |
1158 | ||
855c603d | 1159 | fw_device_get(device); |
1dc3bea7 | 1160 | fw_unit_get(unit); |
855c603d | 1161 | |
5a3c2be6 SR |
1162 | /* implicit directory ID */ |
1163 | tgt->directory_id = ((unit->directory - device->config_rom) * 4 | |
1164 | + CSR_CONFIG_ROM) & 0xffffff; | |
1165 | ||
f746072a SR |
1166 | firmware_revision = SBP2_ROM_VALUE_MISSING; |
1167 | model = SBP2_ROM_VALUE_MISSING; | |
1168 | ||
5a3c2be6 SR |
1169 | if (sbp2_scan_unit_dir(tgt, unit->directory, &model, |
1170 | &firmware_revision) < 0) | |
1171 | goto fail_tgt_put; | |
1172 | ||
eaf76e0d | 1173 | sbp2_clamp_management_orb_timeout(tgt); |
5a3c2be6 | 1174 | sbp2_init_workarounds(tgt, model, firmware_revision); |
9ba136d0 | 1175 | |
a08e100a SR |
1176 | /* |
1177 | * At S100 we can do 512 bytes per packet, at S200 1024 bytes, | |
1178 | * and so on up to 4096 bytes. The SBP-2 max_payload field | |
1179 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
1180 | * if we set this to max_speed + 7, we get the right value. | |
1181 | */ | |
1182 | tgt->max_payload = min(device->max_speed + 7, 10U); | |
1183 | tgt->max_payload = min(tgt->max_payload, device->card->max_receive - 1); | |
1184 | ||
285838eb | 1185 | /* Do the login in a workqueue so we can easily reschedule retries. */ |
5a3c2be6 | 1186 | list_for_each_entry(lu, &tgt->lu_list, link) |
0dcfeb7e | 1187 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
9ba136d0 | 1188 | return 0; |
ad85274f | 1189 | |
5a3c2be6 | 1190 | fail_tgt_put: |
285838eb | 1191 | sbp2_target_put(tgt); |
5a3c2be6 SR |
1192 | return -ENOMEM; |
1193 | ||
1194 | fail_shost_put: | |
1195 | scsi_host_put(shost); | |
1196 | return -ENOMEM; | |
9ba136d0 KH |
1197 | } |
1198 | ||
1199 | static int sbp2_remove(struct device *dev) | |
1200 | { | |
1201 | struct fw_unit *unit = fw_unit(dev); | |
d961450d | 1202 | struct sbp2_target *tgt = dev_get_drvdata(&unit->device); |
9ba136d0 | 1203 | |
285838eb | 1204 | sbp2_target_put(tgt); |
9ba136d0 KH |
1205 | return 0; |
1206 | } | |
1207 | ||
1208 | static void sbp2_reconnect(struct work_struct *work) | |
1209 | { | |
5a3c2be6 SR |
1210 | struct sbp2_logical_unit *lu = |
1211 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 | 1212 | struct sbp2_target *tgt = lu->tgt; |
e5110d01 | 1213 | struct fw_device *device = target_device(tgt); |
9ba136d0 KH |
1214 | int generation, node_id, local_node_id; |
1215 | ||
be6f48b0 SR |
1216 | if (fw_device_is_shutdown(device)) |
1217 | goto out; | |
1218 | ||
5a8a1bcd | 1219 | generation = device->generation; |
621f6dd7 | 1220 | smp_rmb(); /* node IDs must not be older than generation */ |
5a8a1bcd SR |
1221 | node_id = device->node_id; |
1222 | local_node_id = device->card->node_id; | |
9ba136d0 | 1223 | |
5a3c2be6 | 1224 | if (sbp2_send_management_orb(lu, node_id, generation, |
7f37c426 | 1225 | SBP2_RECONNECT_REQUEST, |
5a3c2be6 | 1226 | lu->login_id, NULL) < 0) { |
ce896d95 SR |
1227 | /* |
1228 | * If reconnect was impossible even though we are in the | |
1229 | * current generation, fall back and try to log in again. | |
1230 | * | |
1231 | * We could check for "Function rejected" status, but | |
1232 | * looking at the bus generation as simpler and more general. | |
1233 | */ | |
1234 | smp_rmb(); /* get current card generation */ | |
1235 | if (generation == device->card->generation || | |
1236 | lu->retries++ >= 5) { | |
48f18c76 | 1237 | fw_error("%s: failed to reconnect\n", tgt->bus_id); |
5a3c2be6 SR |
1238 | lu->retries = 0; |
1239 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); | |
7f37c426 | 1240 | } |
285838eb SR |
1241 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
1242 | goto out; | |
7f37c426 | 1243 | } |
9ba136d0 | 1244 | |
48f18c76 SR |
1245 | tgt->node_id = node_id; |
1246 | tgt->address_high = local_node_id << 16; | |
621f6dd7 SR |
1247 | smp_wmb(); /* node IDs must not be older than generation */ |
1248 | lu->generation = generation; | |
7f37c426 | 1249 | |
48f18c76 SR |
1250 | fw_notify("%s: reconnected to LUN %04x (%d retries)\n", |
1251 | tgt->bus_id, lu->lun, lu->retries); | |
5a3c2be6 SR |
1252 | |
1253 | sbp2_agent_reset(lu); | |
1254 | sbp2_cancel_orbs(lu); | |
2e2705bd | 1255 | sbp2_conditionally_unblock(lu); |
285838eb | 1256 | out: |
48f18c76 | 1257 | sbp2_target_put(tgt); |
9ba136d0 KH |
1258 | } |
1259 | ||
1260 | static void sbp2_update(struct fw_unit *unit) | |
1261 | { | |
d961450d | 1262 | struct sbp2_target *tgt = dev_get_drvdata(&unit->device); |
5a3c2be6 | 1263 | struct sbp2_logical_unit *lu; |
9ba136d0 | 1264 | |
e5110d01 | 1265 | fw_device_enable_phys_dma(fw_parent_device(unit)); |
5a3c2be6 SR |
1266 | |
1267 | /* | |
1268 | * Fw-core serializes sbp2_update() against sbp2_remove(). | |
1269 | * Iteration over tgt->lu_list is therefore safe here. | |
1270 | */ | |
1271 | list_for_each_entry(lu, &tgt->lu_list, link) { | |
2e2705bd | 1272 | sbp2_conditionally_block(lu); |
5a3c2be6 | 1273 | lu->retries = 0; |
285838eb | 1274 | sbp2_queue_work(lu, 0); |
5a3c2be6 | 1275 | } |
9ba136d0 KH |
1276 | } |
1277 | ||
1278 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
1279 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
1280 | ||
b3b29888 | 1281 | static const struct ieee1394_device_id sbp2_id_table[] = { |
9ba136d0 | 1282 | { |
b3b29888 SR |
1283 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | |
1284 | IEEE1394_MATCH_VERSION, | |
9ba136d0 | 1285 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, |
5af4e5ea | 1286 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
1287 | }, |
1288 | { } | |
1289 | }; | |
1290 | ||
1291 | static struct fw_driver sbp2_driver = { | |
1292 | .driver = { | |
1293 | .owner = THIS_MODULE, | |
1294 | .name = sbp2_driver_name, | |
1295 | .bus = &fw_bus_type, | |
1296 | .probe = sbp2_probe, | |
1297 | .remove = sbp2_remove, | |
1298 | }, | |
1299 | .update = sbp2_update, | |
1300 | .id_table = sbp2_id_table, | |
1301 | }; | |
1302 | ||
5e212567 SR |
1303 | static void sbp2_unmap_scatterlist(struct device *card_device, |
1304 | struct sbp2_command_orb *orb) | |
1305 | { | |
1306 | if (scsi_sg_count(orb->cmd)) | |
1307 | dma_unmap_sg(card_device, scsi_sglist(orb->cmd), | |
1308 | scsi_sg_count(orb->cmd), | |
1309 | orb->cmd->sc_data_direction); | |
1310 | ||
1311 | if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT)) | |
1312 | dma_unmap_single(card_device, orb->page_table_bus, | |
1313 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
1314 | } | |
1315 | ||
53dca511 | 1316 | static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) |
9ba136d0 | 1317 | { |
fbb5423c KH |
1318 | int sam_status; |
1319 | ||
9ba136d0 KH |
1320 | sense_data[0] = 0x70; |
1321 | sense_data[1] = 0x0; | |
1322 | sense_data[2] = sbp2_status[1]; | |
1323 | sense_data[3] = sbp2_status[4]; | |
1324 | sense_data[4] = sbp2_status[5]; | |
1325 | sense_data[5] = sbp2_status[6]; | |
1326 | sense_data[6] = sbp2_status[7]; | |
1327 | sense_data[7] = 10; | |
1328 | sense_data[8] = sbp2_status[8]; | |
1329 | sense_data[9] = sbp2_status[9]; | |
1330 | sense_data[10] = sbp2_status[10]; | |
1331 | sense_data[11] = sbp2_status[11]; | |
1332 | sense_data[12] = sbp2_status[2]; | |
1333 | sense_data[13] = sbp2_status[3]; | |
1334 | sense_data[14] = sbp2_status[12]; | |
1335 | sense_data[15] = sbp2_status[13]; | |
1336 | ||
fbb5423c | 1337 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 1338 | |
fbb5423c KH |
1339 | switch (sam_status) { |
1340 | case SAM_STAT_GOOD: | |
9ba136d0 | 1341 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 1342 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 1343 | case SAM_STAT_BUSY: |
9ba136d0 KH |
1344 | case SAM_STAT_RESERVATION_CONFLICT: |
1345 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
1346 | return DID_OK << 16 | sam_status; |
1347 | ||
9ba136d0 | 1348 | default: |
fbb5423c | 1349 | return DID_ERROR << 16; |
9ba136d0 KH |
1350 | } |
1351 | } | |
1352 | ||
53dca511 SR |
1353 | static void complete_command_orb(struct sbp2_orb *base_orb, |
1354 | struct sbp2_status *status) | |
9ba136d0 | 1355 | { |
6f061487 JF |
1356 | struct sbp2_command_orb *orb = |
1357 | container_of(base_orb, struct sbp2_command_orb, base); | |
e5110d01 | 1358 | struct fw_device *device = target_device(orb->lu->tgt); |
9ba136d0 KH |
1359 | int result; |
1360 | ||
1361 | if (status != NULL) { | |
a77754a7 | 1362 | if (STATUS_GET_DEAD(*status)) |
e0e60215 | 1363 | sbp2_agent_reset_no_wait(orb->lu); |
9ba136d0 | 1364 | |
a77754a7 | 1365 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 1366 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 1367 | result = DID_OK << 16; |
9ba136d0 KH |
1368 | break; |
1369 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 1370 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
1371 | break; |
1372 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
1373 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
1374 | default: | |
fbb5423c | 1375 | result = DID_ERROR << 16; |
9ba136d0 KH |
1376 | break; |
1377 | } | |
1378 | ||
a77754a7 KH |
1379 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
1380 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
1381 | orb->cmd->sense_buffer); |
1382 | } else { | |
c781c06d KH |
1383 | /* |
1384 | * If the orb completes with status == NULL, something | |
9ba136d0 | 1385 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
1386 | * or when sending the write (less likely). |
1387 | */ | |
fbb5423c | 1388 | result = DID_BUS_BUSY << 16; |
2e2705bd | 1389 | sbp2_conditionally_block(orb->lu); |
9ba136d0 KH |
1390 | } |
1391 | ||
1392 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 1393 | sizeof(orb->request), DMA_TO_DEVICE); |
5e212567 | 1394 | sbp2_unmap_scatterlist(device->card->device, orb); |
9ba136d0 | 1395 | |
fbb5423c | 1396 | orb->cmd->result = result; |
b75ca5ea | 1397 | orb->cmd->scsi_done(orb->cmd); |
9ba136d0 KH |
1398 | } |
1399 | ||
53dca511 SR |
1400 | static int sbp2_map_scatterlist(struct sbp2_command_orb *orb, |
1401 | struct fw_device *device, struct sbp2_logical_unit *lu) | |
9ba136d0 | 1402 | { |
09b12dd4 SR |
1403 | struct scatterlist *sg = scsi_sglist(orb->cmd); |
1404 | int i, n; | |
1405 | ||
1406 | n = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd), | |
1407 | orb->cmd->sc_data_direction); | |
1408 | if (n == 0) | |
95ffc5e3 | 1409 | goto fail; |
9ba136d0 | 1410 | |
c781c06d KH |
1411 | /* |
1412 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
1413 | * the scatter list by converting it to an immediate block |
1414 | * request. This is also a workaround for broken devices such | |
1415 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
1416 | * tables. |
1417 | */ | |
09b12dd4 | 1418 | if (n == 1) { |
71ee9f01 SR |
1419 | orb->request.data_descriptor.high = |
1420 | cpu_to_be32(lu->tgt->address_high); | |
1421 | orb->request.data_descriptor.low = | |
1422 | cpu_to_be32(sg_dma_address(sg)); | |
1423 | orb->request.misc |= | |
1424 | cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg))); | |
95ffc5e3 | 1425 | return 0; |
9ba136d0 KH |
1426 | } |
1427 | ||
09b12dd4 SR |
1428 | for_each_sg(sg, sg, n, i) { |
1429 | orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16); | |
1430 | orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg)); | |
9ba136d0 KH |
1431 | } |
1432 | ||
b4be016a SR |
1433 | orb->page_table_bus = |
1434 | dma_map_single(device->card->device, orb->page_table, | |
1435 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
8d8bb39b | 1436 | if (dma_mapping_error(device->card->device, orb->page_table_bus)) |
b4be016a | 1437 | goto fail_page_table; |
9ba136d0 | 1438 | |
c781c06d KH |
1439 | /* |
1440 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
1441 | * to fill in the node ID part of the address. All other |
1442 | * pointers assume that the data referenced reside on the | |
1443 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
1444 | * on other nodes so we need to put our ID in descriptor.high. |
1445 | */ | |
71ee9f01 SR |
1446 | orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high); |
1447 | orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus); | |
1448 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT | | |
09b12dd4 | 1449 | COMMAND_ORB_DATA_SIZE(n)); |
9ba136d0 | 1450 | |
95ffc5e3 KH |
1451 | return 0; |
1452 | ||
1453 | fail_page_table: | |
09b12dd4 SR |
1454 | dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd), |
1455 | scsi_sg_count(orb->cmd), orb->cmd->sc_data_direction); | |
95ffc5e3 KH |
1456 | fail: |
1457 | return -ENOMEM; | |
9ba136d0 KH |
1458 | } |
1459 | ||
9ba136d0 KH |
1460 | /* SCSI stack integration */ |
1461 | ||
b75ca5ea SR |
1462 | static int sbp2_scsi_queuecommand(struct Scsi_Host *shost, |
1463 | struct scsi_cmnd *cmd) | |
9ba136d0 | 1464 | { |
5a3c2be6 | 1465 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
e5110d01 | 1466 | struct fw_device *device = target_device(lu->tgt); |
9ba136d0 | 1467 | struct sbp2_command_orb *orb; |
4bbc1bdd | 1468 | int generation, retval = SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1469 | |
c781c06d KH |
1470 | /* |
1471 | * Bidirectional commands are not yet implemented, and unknown | |
1472 | * transfer direction not handled. | |
1473 | */ | |
9ba136d0 | 1474 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
8a8cea27 | 1475 | fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n"); |
e1b68c4d | 1476 | cmd->result = DID_ERROR << 16; |
b75ca5ea | 1477 | cmd->scsi_done(cmd); |
e1b68c4d | 1478 | return 0; |
9ba136d0 KH |
1479 | } |
1480 | ||
2d826cc5 | 1481 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
1482 | if (orb == NULL) { |
1483 | fw_notify("failed to alloc orb\n"); | |
5a3c2be6 | 1484 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 KH |
1485 | } |
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 | ||
8ac3a47c SR |
1536 | /* SBP-2 requires quadlet alignment of the data buffers. */ |
1537 | blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1); | |
465ff318 | 1538 | |
5a3c2be6 | 1539 | if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
cfb01381 | 1540 | sdev->inquiry_len = 36; |
5a3c2be6 | 1541 | |
cfb01381 SR |
1542 | return 0; |
1543 | } | |
1544 | ||
9ba136d0 KH |
1545 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1546 | { | |
5a3c2be6 | 1547 | struct sbp2_logical_unit *lu = sdev->hostdata; |
9ba136d0 | 1548 | |
cfb01381 SR |
1549 | sdev->use_10_for_rw = 1; |
1550 | ||
2635f96f SR |
1551 | if (sbp2_param_exclusive_login) |
1552 | sdev->manage_start_stop = 1; | |
1553 | ||
cfb01381 SR |
1554 | if (sdev->type == TYPE_ROM) |
1555 | sdev->use_10_for_ms = 1; | |
5a3c2be6 | 1556 | |
9ba136d0 | 1557 | if (sdev->type == TYPE_DISK && |
5a3c2be6 | 1558 | lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
9ba136d0 | 1559 | sdev->skip_ms_page_8 = 1; |
5a3c2be6 SR |
1560 | |
1561 | if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) | |
9ba136d0 | 1562 | sdev->fix_capacity = 1; |
5a3c2be6 | 1563 | |
ffcaade3 SR |
1564 | if (lu->tgt->workarounds & SBP2_WORKAROUND_POWER_CONDITION) |
1565 | sdev->start_stop_pwr_cond = 1; | |
1566 | ||
5a3c2be6 | 1567 | if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
086fa5ff | 1568 | blk_queue_max_hw_sectors(sdev->request_queue, 128 * 1024 / 512); |
5a3c2be6 | 1569 | |
09b12dd4 SR |
1570 | blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE); |
1571 | ||
9ba136d0 KH |
1572 | return 0; |
1573 | } | |
1574 | ||
1575 | /* | |
1576 | * Called by scsi stack when something has really gone wrong. Usually | |
1577 | * called when a command has timed-out for some reason. | |
1578 | */ | |
1579 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1580 | { | |
5a3c2be6 | 1581 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
9ba136d0 | 1582 | |
48f18c76 | 1583 | fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id); |
5a3c2be6 SR |
1584 | sbp2_agent_reset(lu); |
1585 | sbp2_cancel_orbs(lu); | |
9ba136d0 KH |
1586 | |
1587 | return SUCCESS; | |
1588 | } | |
1589 | ||
14e21986 SR |
1590 | /* |
1591 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: | |
1592 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) | |
1593 | * | |
1594 | * This is the concatenation of target port identifier and logical unit | |
1595 | * identifier as per SAM-2...SAM-4 annex A. | |
1596 | */ | |
53dca511 SR |
1597 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
1598 | struct device_attribute *attr, char *buf) | |
14e21986 SR |
1599 | { |
1600 | struct scsi_device *sdev = to_scsi_device(dev); | |
5a3c2be6 | 1601 | struct sbp2_logical_unit *lu; |
14e21986 SR |
1602 | |
1603 | if (!sdev) | |
1604 | return 0; | |
14e21986 | 1605 | |
5a3c2be6 | 1606 | lu = sdev->hostdata; |
14e21986 | 1607 | |
c9755e14 SR |
1608 | return sprintf(buf, "%016llx:%06x:%04x\n", |
1609 | (unsigned long long)lu->tgt->guid, | |
5a3c2be6 | 1610 | lu->tgt->directory_id, lu->lun); |
14e21986 SR |
1611 | } |
1612 | ||
1613 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
1614 | ||
1615 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { | |
1616 | &dev_attr_ieee1394_id, | |
1617 | NULL | |
1618 | }; | |
1619 | ||
9ba136d0 KH |
1620 | static struct scsi_host_template scsi_driver_template = { |
1621 | .module = THIS_MODULE, | |
1622 | .name = "SBP-2 IEEE-1394", | |
b02b6bc4 | 1623 | .proc_name = sbp2_driver_name, |
9ba136d0 | 1624 | .queuecommand = sbp2_scsi_queuecommand, |
cfb01381 | 1625 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1626 | .slave_configure = sbp2_scsi_slave_configure, |
1627 | .eh_abort_handler = sbp2_scsi_abort, | |
1628 | .this_id = -1, | |
1629 | .sg_tablesize = SG_ALL, | |
1630 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1631 | .cmd_per_lun = 1, |
1632 | .can_queue = 1, | |
14e21986 | 1633 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
9ba136d0 KH |
1634 | }; |
1635 | ||
9ba136d0 KH |
1636 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1637 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1638 | MODULE_LICENSE("GPL"); | |
1639 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1640 | ||
1e4c7b0d OH |
1641 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1642 | #ifndef CONFIG_IEEE1394_SBP2_MODULE | |
1643 | MODULE_ALIAS("sbp2"); | |
1644 | #endif | |
1645 | ||
9ba136d0 KH |
1646 | static int __init sbp2_init(void) |
1647 | { | |
df8ec249 SR |
1648 | sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME); |
1649 | if (!sbp2_wq) | |
1650 | return -ENOMEM; | |
1651 | ||
9ba136d0 KH |
1652 | return driver_register(&sbp2_driver.driver); |
1653 | } | |
1654 | ||
1655 | static void __exit sbp2_cleanup(void) | |
1656 | { | |
1657 | driver_unregister(&sbp2_driver.driver); | |
df8ec249 | 1658 | destroy_workqueue(sbp2_wq); |
9ba136d0 KH |
1659 | } |
1660 | ||
1661 | module_init(sbp2_init); | |
1662 | module_exit(sbp2_cleanup); |