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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> | |
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 | ||
b2af07b6 SR |
157 | static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay) |
158 | { | |
159 | queue_delayed_work(fw_workqueue, &lu->work, delay); | |
160 | } | |
161 | ||
5a3c2be6 SR |
162 | /* |
163 | * We create one struct sbp2_target per IEEE 1212 Unit Directory | |
164 | * and one struct Scsi_Host per sbp2_target. | |
165 | */ | |
166 | struct sbp2_target { | |
5a3c2be6 | 167 | struct fw_unit *unit; |
48f18c76 | 168 | const char *bus_id; |
05cca738 | 169 | struct list_head lu_list; |
5a3c2be6 SR |
170 | |
171 | u64 management_agent_address; | |
c9755e14 | 172 | u64 guid; |
5a3c2be6 SR |
173 | int directory_id; |
174 | int node_id; | |
175 | int address_high; | |
05cca738 | 176 | unsigned int workarounds; |
384170da | 177 | unsigned int mgt_orb_timeout; |
a08e100a | 178 | unsigned int max_payload; |
2e2705bd SR |
179 | |
180 | int dont_block; /* counter for each logical unit */ | |
181 | int blocked; /* ditto */ | |
5a3c2be6 SR |
182 | }; |
183 | ||
e5110d01 SR |
184 | static struct fw_device *target_device(struct sbp2_target *tgt) |
185 | { | |
186 | return fw_parent_device(tgt->unit); | |
187 | } | |
188 | ||
cd1f70fd JF |
189 | /* Impossible login_id, to detect logout attempt before successful login */ |
190 | #define INVALID_LOGIN_ID 0x10000 | |
191 | ||
eaf76e0d | 192 | #define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */ |
9ba136d0 | 193 | #define SBP2_ORB_NULL 0x80000000 |
17cff9ff JW |
194 | #define SBP2_RETRY_LIMIT 0xf /* 15 retries */ |
195 | #define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */ | |
9ba136d0 | 196 | |
af271941 SR |
197 | /* |
198 | * There is no transport protocol limit to the CDB length, but we implement | |
199 | * a fixed length only. 16 bytes is enough for disks larger than 2 TB. | |
200 | */ | |
201 | #define SBP2_MAX_CDB_SIZE 16 | |
202 | ||
09b12dd4 SR |
203 | /* |
204 | * The default maximum s/g segment size of a FireWire controller is | |
205 | * usually 0x10000, but SBP-2 only allows 0xffff. Since buffers have to | |
206 | * be quadlet-aligned, we set the length limit to 0xffff & ~3. | |
207 | */ | |
208 | #define SBP2_MAX_SEG_SIZE 0xfffc | |
209 | ||
9ba136d0 | 210 | /* Unit directory keys */ |
384170da | 211 | #define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a |
5a3c2be6 SR |
212 | #define SBP2_CSR_FIRMWARE_REVISION 0x3c |
213 | #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 | |
214 | #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 | |
9ba136d0 | 215 | |
9ba136d0 KH |
216 | /* Management orb opcodes */ |
217 | #define SBP2_LOGIN_REQUEST 0x0 | |
218 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
219 | #define SBP2_RECONNECT_REQUEST 0x3 | |
220 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
221 | #define SBP2_LOGOUT_REQUEST 0x7 | |
222 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
223 | #define SBP2_ABORT_TASK_SET 0xc | |
224 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
225 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
226 | ||
227 | /* Offsets for command block agent registers */ | |
228 | #define SBP2_AGENT_STATE 0x00 | |
229 | #define SBP2_AGENT_RESET 0x04 | |
230 | #define SBP2_ORB_POINTER 0x08 | |
231 | #define SBP2_DOORBELL 0x10 | |
232 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
233 | ||
234 | /* Status write response codes */ | |
235 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
236 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
237 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
238 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
239 | ||
a77754a7 KH |
240 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
241 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) | |
242 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) | |
243 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) | |
244 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) | |
245 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) | |
246 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) | |
247 | #define STATUS_GET_DATA(v) ((v).data) | |
9ba136d0 KH |
248 | |
249 | struct sbp2_status { | |
250 | u32 status; | |
251 | u32 orb_low; | |
252 | u8 data[24]; | |
253 | }; | |
254 | ||
255 | struct sbp2_pointer { | |
71ee9f01 SR |
256 | __be32 high; |
257 | __be32 low; | |
9ba136d0 KH |
258 | }; |
259 | ||
260 | struct sbp2_orb { | |
261 | struct fw_transaction t; | |
e57d2011 | 262 | struct kref kref; |
9ba136d0 KH |
263 | dma_addr_t request_bus; |
264 | int rcode; | |
a98e2719 | 265 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
9ba136d0 KH |
266 | struct list_head link; |
267 | }; | |
268 | ||
a77754a7 KH |
269 | #define MANAGEMENT_ORB_LUN(v) ((v)) |
270 | #define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16) | |
271 | #define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20) | |
5cd54c94 | 272 | #define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0) |
a77754a7 KH |
273 | #define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29) |
274 | #define MANAGEMENT_ORB_NOTIFY ((1) << 31) | |
9ba136d0 | 275 | |
a77754a7 KH |
276 | #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) |
277 | #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) | |
9ba136d0 KH |
278 | |
279 | struct sbp2_management_orb { | |
280 | struct sbp2_orb base; | |
281 | struct { | |
282 | struct sbp2_pointer password; | |
283 | struct sbp2_pointer response; | |
71ee9f01 SR |
284 | __be32 misc; |
285 | __be32 length; | |
9ba136d0 KH |
286 | struct sbp2_pointer status_fifo; |
287 | } request; | |
288 | __be32 response[4]; | |
289 | dma_addr_t response_bus; | |
290 | struct completion done; | |
291 | struct sbp2_status status; | |
292 | }; | |
293 | ||
9ba136d0 | 294 | struct sbp2_login_response { |
71ee9f01 | 295 | __be32 misc; |
9ba136d0 | 296 | struct sbp2_pointer command_block_agent; |
71ee9f01 | 297 | __be32 reconnect_hold; |
9ba136d0 | 298 | }; |
a77754a7 KH |
299 | #define COMMAND_ORB_DATA_SIZE(v) ((v)) |
300 | #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) | |
301 | #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) | |
302 | #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) | |
303 | #define COMMAND_ORB_SPEED(v) ((v) << 24) | |
0d7dcbf2 | 304 | #define COMMAND_ORB_DIRECTION ((1) << 27) |
a77754a7 KH |
305 | #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) |
306 | #define COMMAND_ORB_NOTIFY ((1) << 31) | |
9ba136d0 KH |
307 | |
308 | struct sbp2_command_orb { | |
309 | struct sbp2_orb base; | |
310 | struct { | |
311 | struct sbp2_pointer next; | |
312 | struct sbp2_pointer data_descriptor; | |
71ee9f01 | 313 | __be32 misc; |
af271941 | 314 | u8 command_block[SBP2_MAX_CDB_SIZE]; |
9ba136d0 KH |
315 | } request; |
316 | struct scsi_cmnd *cmd; | |
5a3c2be6 | 317 | struct sbp2_logical_unit *lu; |
9ba136d0 | 318 | |
9fb2dd12 | 319 | struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); |
9ba136d0 | 320 | dma_addr_t page_table_bus; |
9ba136d0 KH |
321 | }; |
322 | ||
f746072a SR |
323 | #define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */ |
324 | #define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */ | |
325 | ||
9ba136d0 KH |
326 | /* |
327 | * List of devices with known bugs. | |
328 | * | |
329 | * The firmware_revision field, masked with 0xffff00, is the best | |
330 | * indicator for the type of bridge chip of a device. It yields a few | |
331 | * false positives but this did not break correctly behaving devices | |
f746072a | 332 | * so far. |
9ba136d0 KH |
333 | */ |
334 | static const struct { | |
335 | u32 firmware_revision; | |
336 | u32 model; | |
05cca738 | 337 | unsigned int workarounds; |
9ba136d0 KH |
338 | } sbp2_workarounds_table[] = { |
339 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
340 | .firmware_revision = 0x002800, | |
341 | .model = 0x001010, | |
342 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
ffcaade3 SR |
343 | SBP2_WORKAROUND_MODE_SENSE_8 | |
344 | SBP2_WORKAROUND_POWER_CONDITION, | |
9ba136d0 | 345 | }, |
9220f194 SR |
346 | /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { |
347 | .firmware_revision = 0x002800, | |
348 | .model = 0x000000, | |
3c5f8035 | 349 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
9220f194 | 350 | }, |
9ba136d0 KH |
351 | /* Initio bridges, actually only needed for some older ones */ { |
352 | .firmware_revision = 0x000200, | |
f746072a | 353 | .model = SBP2_ROM_VALUE_WILDCARD, |
9ba136d0 KH |
354 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
355 | }, | |
ffcaade3 SR |
356 | /* PL-3507 bridge with Prolific firmware */ { |
357 | .firmware_revision = 0x012800, | |
f746072a | 358 | .model = SBP2_ROM_VALUE_WILDCARD, |
ffcaade3 SR |
359 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
360 | }, | |
9ba136d0 KH |
361 | /* Symbios bridge */ { |
362 | .firmware_revision = 0xa0b800, | |
f746072a | 363 | .model = SBP2_ROM_VALUE_WILDCARD, |
9ba136d0 KH |
364 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
365 | }, | |
2aa9ff7f SR |
366 | /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ { |
367 | .firmware_revision = 0x002600, | |
f746072a | 368 | .model = SBP2_ROM_VALUE_WILDCARD, |
2aa9ff7f SR |
369 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
370 | }, | |
c781c06d | 371 | /* |
c8c4707c SR |
372 | * iPod 2nd generation: needs 128k max transfer size workaround |
373 | * iPod 3rd generation: needs fix capacity workaround | |
c781c06d | 374 | */ |
c8c4707c SR |
375 | { |
376 | .firmware_revision = 0x0a2700, | |
377 | .model = 0x000000, | |
378 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS | | |
379 | SBP2_WORKAROUND_FIX_CAPACITY, | |
380 | }, | |
381 | /* iPod 4th generation */ { | |
9ba136d0 KH |
382 | .firmware_revision = 0x0a2700, |
383 | .model = 0x000021, | |
384 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
385 | }, | |
031bb27c SR |
386 | /* iPod mini */ { |
387 | .firmware_revision = 0x0a2700, | |
388 | .model = 0x000022, | |
389 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
390 | }, | |
9ba136d0 KH |
391 | /* iPod mini */ { |
392 | .firmware_revision = 0x0a2700, | |
393 | .model = 0x000023, | |
394 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
395 | }, | |
396 | /* iPod Photo */ { | |
397 | .firmware_revision = 0x0a2700, | |
398 | .model = 0x00007e, | |
399 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
400 | } | |
401 | }; | |
402 | ||
53dca511 | 403 | static void free_orb(struct kref *kref) |
e57d2011 KH |
404 | { |
405 | struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); | |
406 | ||
407 | kfree(orb); | |
408 | } | |
409 | ||
53dca511 SR |
410 | static void sbp2_status_write(struct fw_card *card, struct fw_request *request, |
411 | int tcode, int destination, int source, | |
33e553fe | 412 | int generation, unsigned long long offset, |
53dca511 | 413 | void *payload, size_t length, void *callback_data) |
9ba136d0 | 414 | { |
5a3c2be6 | 415 | struct sbp2_logical_unit *lu = callback_data; |
9ba136d0 KH |
416 | struct sbp2_orb *orb; |
417 | struct sbp2_status status; | |
9ba136d0 KH |
418 | unsigned long flags; |
419 | ||
420 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
094614fc | 421 | length < 8 || length > sizeof(status)) { |
9ba136d0 KH |
422 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
423 | return; | |
424 | } | |
425 | ||
094614fc SR |
426 | status.status = be32_to_cpup(payload); |
427 | status.orb_low = be32_to_cpup(payload + 4); | |
428 | memset(status.data, 0, sizeof(status.data)); | |
429 | if (length > 8) | |
430 | memcpy(status.data, payload + 8, length - 8); | |
431 | ||
a77754a7 | 432 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
9ba136d0 KH |
433 | fw_notify("non-orb related status write, not handled\n"); |
434 | fw_send_response(card, request, RCODE_COMPLETE); | |
435 | return; | |
436 | } | |
437 | ||
438 | /* Lookup the orb corresponding to this status write. */ | |
439 | spin_lock_irqsave(&card->lock, flags); | |
5a3c2be6 | 440 | list_for_each_entry(orb, &lu->orb_list, link) { |
a77754a7 | 441 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
e57d2011 KH |
442 | STATUS_GET_ORB_LOW(status) == orb->request_bus) { |
443 | orb->rcode = RCODE_COMPLETE; | |
9ba136d0 KH |
444 | list_del(&orb->link); |
445 | break; | |
446 | } | |
447 | } | |
448 | spin_unlock_irqrestore(&card->lock, flags); | |
449 | ||
baed6b82 | 450 | if (&orb->link != &lu->orb_list) { |
9ba136d0 | 451 | orb->callback(orb, &status); |
6c74340b | 452 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
baed6b82 | 453 | } else { |
9ba136d0 | 454 | fw_error("status write for unknown orb\n"); |
baed6b82 | 455 | } |
e57d2011 | 456 | |
9ba136d0 KH |
457 | fw_send_response(card, request, RCODE_COMPLETE); |
458 | } | |
459 | ||
53dca511 SR |
460 | static void complete_transaction(struct fw_card *card, int rcode, |
461 | void *payload, size_t length, void *data) | |
9ba136d0 KH |
462 | { |
463 | struct sbp2_orb *orb = data; | |
464 | unsigned long flags; | |
465 | ||
e57d2011 KH |
466 | /* |
467 | * This is a little tricky. We can get the status write for | |
468 | * the orb before we get this callback. The status write | |
469 | * handler above will assume the orb pointer transaction was | |
470 | * successful and set the rcode to RCODE_COMPLETE for the orb. | |
471 | * So this callback only sets the rcode if it hasn't already | |
472 | * been set and only does the cleanup if the transaction | |
473 | * failed and we didn't already get a status write. | |
474 | */ | |
475 | spin_lock_irqsave(&card->lock, flags); | |
476 | ||
477 | if (orb->rcode == -1) | |
478 | orb->rcode = rcode; | |
7a4e1e9c | 479 | if (orb->rcode != RCODE_COMPLETE) { |
9ba136d0 | 480 | list_del(&orb->link); |
1b34e974 | 481 | spin_unlock_irqrestore(&card->lock, flags); |
6c74340b | 482 | |
9ba136d0 | 483 | orb->callback(orb, NULL); |
6c74340b | 484 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
1b34e974 SR |
485 | } else { |
486 | spin_unlock_irqrestore(&card->lock, flags); | |
9ba136d0 | 487 | } |
e57d2011 | 488 | |
6c74340b | 489 | kref_put(&orb->kref, free_orb); /* transaction callback reference */ |
9ba136d0 KH |
490 | } |
491 | ||
53dca511 SR |
492 | static void sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, |
493 | int node_id, int generation, u64 offset) | |
9ba136d0 | 494 | { |
e5110d01 | 495 | struct fw_device *device = target_device(lu->tgt); |
81bf52d8 | 496 | struct sbp2_pointer orb_pointer; |
9ba136d0 KH |
497 | unsigned long flags; |
498 | ||
81bf52d8 SR |
499 | orb_pointer.high = 0; |
500 | orb_pointer.low = cpu_to_be32(orb->request_bus); | |
9ba136d0 KH |
501 | |
502 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 503 | list_add_tail(&orb->link, &lu->orb_list); |
9ba136d0 KH |
504 | spin_unlock_irqrestore(&device->card->lock, flags); |
505 | ||
6c74340b SR |
506 | kref_get(&orb->kref); /* transaction callback reference */ |
507 | kref_get(&orb->kref); /* orb callback reference */ | |
e57d2011 | 508 | |
9ba136d0 | 509 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
f1397490 | 510 | node_id, generation, device->max_speed, offset, |
81bf52d8 | 511 | &orb_pointer, 8, complete_transaction, orb); |
9ba136d0 KH |
512 | } |
513 | ||
5a3c2be6 | 514 | static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |
9ba136d0 | 515 | { |
e5110d01 | 516 | struct fw_device *device = target_device(lu->tgt); |
9ba136d0 KH |
517 | struct sbp2_orb *orb, *next; |
518 | struct list_head list; | |
519 | unsigned long flags; | |
2aaad97b | 520 | int retval = -ENOENT; |
9ba136d0 KH |
521 | |
522 | INIT_LIST_HEAD(&list); | |
523 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 524 | list_splice_init(&lu->orb_list, &list); |
9ba136d0 KH |
525 | spin_unlock_irqrestore(&device->card->lock, flags); |
526 | ||
527 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 528 | retval = 0; |
7a4e1e9c SR |
529 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
530 | continue; | |
730c32f5 | 531 | |
9ba136d0 KH |
532 | orb->rcode = RCODE_CANCELLED; |
533 | orb->callback(orb, NULL); | |
6c74340b | 534 | kref_put(&orb->kref, free_orb); /* orb callback reference */ |
9ba136d0 | 535 | } |
9ba136d0 | 536 | |
2aaad97b | 537 | return retval; |
1d3d52c5 KH |
538 | } |
539 | ||
53dca511 SR |
540 | static void complete_management_orb(struct sbp2_orb *base_orb, |
541 | struct sbp2_status *status) | |
9ba136d0 KH |
542 | { |
543 | struct sbp2_management_orb *orb = | |
6f061487 | 544 | container_of(base_orb, struct sbp2_management_orb, base); |
9ba136d0 KH |
545 | |
546 | if (status) | |
2d826cc5 | 547 | memcpy(&orb->status, status, sizeof(*status)); |
9ba136d0 KH |
548 | complete(&orb->done); |
549 | } | |
550 | ||
53dca511 SR |
551 | static int sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id, |
552 | int generation, int function, | |
553 | int lun_or_login_id, void *response) | |
9ba136d0 | 554 | { |
e5110d01 | 555 | struct fw_device *device = target_device(lu->tgt); |
9ba136d0 | 556 | struct sbp2_management_orb *orb; |
a4c379c1 | 557 | unsigned int timeout; |
9ba136d0 KH |
558 | int retval = -ENOMEM; |
559 | ||
be6f48b0 SR |
560 | if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device)) |
561 | return 0; | |
562 | ||
2d826cc5 | 563 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
564 | if (orb == NULL) |
565 | return -ENOMEM; | |
566 | ||
e57d2011 | 567 | kref_init(&orb->base.kref); |
9ba136d0 KH |
568 | orb->response_bus = |
569 | dma_map_single(device->card->device, &orb->response, | |
2d826cc5 | 570 | sizeof(orb->response), DMA_FROM_DEVICE); |
8d8bb39b | 571 | if (dma_mapping_error(device->card->device, orb->response_bus)) |
7aa48481 | 572 | goto fail_mapping_response; |
9ba136d0 | 573 | |
71ee9f01 SR |
574 | orb->request.response.high = 0; |
575 | orb->request.response.low = cpu_to_be32(orb->response_bus); | |
9ba136d0 | 576 | |
71ee9f01 | 577 | orb->request.misc = cpu_to_be32( |
a77754a7 KH |
578 | MANAGEMENT_ORB_NOTIFY | |
579 | MANAGEMENT_ORB_FUNCTION(function) | | |
71ee9f01 SR |
580 | MANAGEMENT_ORB_LUN(lun_or_login_id)); |
581 | orb->request.length = cpu_to_be32( | |
582 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response))); | |
9ba136d0 | 583 | |
71ee9f01 SR |
584 | orb->request.status_fifo.high = |
585 | cpu_to_be32(lu->address_handler.offset >> 32); | |
586 | orb->request.status_fifo.low = | |
587 | cpu_to_be32(lu->address_handler.offset); | |
9ba136d0 | 588 | |
9ba136d0 | 589 | if (function == SBP2_LOGIN_REQUEST) { |
14dc992a | 590 | /* Ask for 2^2 == 4 seconds reconnect grace period */ |
71ee9f01 | 591 | orb->request.misc |= cpu_to_be32( |
14dc992a | 592 | MANAGEMENT_ORB_RECONNECT(2) | |
71ee9f01 | 593 | MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login)); |
384170da | 594 | timeout = lu->tgt->mgt_orb_timeout; |
a4c379c1 JW |
595 | } else { |
596 | timeout = SBP2_ORB_TIMEOUT; | |
9ba136d0 KH |
597 | } |
598 | ||
9ba136d0 KH |
599 | init_completion(&orb->done); |
600 | orb->base.callback = complete_management_orb; | |
2aaad97b | 601 | |
7aa48481 SR |
602 | orb->base.request_bus = |
603 | dma_map_single(device->card->device, &orb->request, | |
604 | sizeof(orb->request), DMA_TO_DEVICE); | |
8d8bb39b | 605 | if (dma_mapping_error(device->card->device, orb->base.request_bus)) |
7aa48481 SR |
606 | goto fail_mapping_request; |
607 | ||
5a3c2be6 SR |
608 | sbp2_send_orb(&orb->base, lu, node_id, generation, |
609 | lu->tgt->management_agent_address); | |
9ba136d0 | 610 | |
a4c379c1 | 611 | wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout)); |
9ba136d0 | 612 | |
9ba136d0 | 613 | retval = -EIO; |
5a3c2be6 | 614 | if (sbp2_cancel_orbs(lu) == 0) { |
48f18c76 SR |
615 | fw_error("%s: orb reply timed out, rcode=0x%02x\n", |
616 | lu->tgt->bus_id, orb->base.rcode); | |
9ba136d0 KH |
617 | goto out; |
618 | } | |
619 | ||
2aaad97b | 620 | if (orb->base.rcode != RCODE_COMPLETE) { |
48f18c76 SR |
621 | fw_error("%s: management write failed, rcode 0x%02x\n", |
622 | lu->tgt->bus_id, orb->base.rcode); | |
9ba136d0 KH |
623 | goto out; |
624 | } | |
625 | ||
a77754a7 KH |
626 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
627 | STATUS_GET_SBP_STATUS(orb->status) != 0) { | |
48f18c76 | 628 | fw_error("%s: error status: %d:%d\n", lu->tgt->bus_id, |
a77754a7 KH |
629 | STATUS_GET_RESPONSE(orb->status), |
630 | STATUS_GET_SBP_STATUS(orb->status)); | |
9ba136d0 KH |
631 | goto out; |
632 | } | |
633 | ||
634 | retval = 0; | |
635 | out: | |
636 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 637 | sizeof(orb->request), DMA_TO_DEVICE); |
7aa48481 | 638 | fail_mapping_request: |
9ba136d0 | 639 | dma_unmap_single(device->card->device, orb->response_bus, |
2d826cc5 | 640 | sizeof(orb->response), DMA_FROM_DEVICE); |
7aa48481 | 641 | fail_mapping_response: |
9ba136d0 | 642 | if (response) |
71ee9f01 | 643 | memcpy(response, orb->response, sizeof(orb->response)); |
e57d2011 | 644 | kref_put(&orb->base.kref, free_orb); |
9ba136d0 KH |
645 | |
646 | return retval; | |
647 | } | |
648 | ||
e0e60215 SR |
649 | static void sbp2_agent_reset(struct sbp2_logical_unit *lu) |
650 | { | |
e5110d01 | 651 | struct fw_device *device = target_device(lu->tgt); |
1e119fa9 | 652 | __be32 d = 0; |
9ba136d0 | 653 | |
1e119fa9 JF |
654 | fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, |
655 | lu->tgt->node_id, lu->generation, device->max_speed, | |
656 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
e847cc83 | 657 | &d, 4); |
9ba136d0 KH |
658 | } |
659 | ||
53dca511 SR |
660 | static void complete_agent_reset_write_no_wait(struct fw_card *card, |
661 | int rcode, void *payload, size_t length, void *data) | |
e0e60215 SR |
662 | { |
663 | kfree(data); | |
664 | } | |
665 | ||
666 | static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu) | |
9ba136d0 | 667 | { |
e5110d01 | 668 | struct fw_device *device = target_device(lu->tgt); |
9ba136d0 | 669 | struct fw_transaction *t; |
1e119fa9 | 670 | static __be32 d; |
9ba136d0 | 671 | |
e0e60215 | 672 | t = kmalloc(sizeof(*t), GFP_ATOMIC); |
9ba136d0 | 673 | if (t == NULL) |
e0e60215 | 674 | return; |
9ba136d0 KH |
675 | |
676 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
5a3c2be6 SR |
677 | lu->tgt->node_id, lu->generation, device->max_speed, |
678 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
e847cc83 | 679 | &d, 4, complete_agent_reset_write_no_wait, t); |
9ba136d0 KH |
680 | } |
681 | ||
2e2705bd SR |
682 | static inline void sbp2_allow_block(struct sbp2_logical_unit *lu) |
683 | { | |
684 | /* | |
685 | * We may access dont_block without taking card->lock here: | |
686 | * All callers of sbp2_allow_block() and all callers of sbp2_unblock() | |
687 | * are currently serialized against each other. | |
688 | * And a wrong result in sbp2_conditionally_block()'s access of | |
689 | * dont_block is rather harmless, it simply misses its first chance. | |
690 | */ | |
691 | --lu->tgt->dont_block; | |
692 | } | |
693 | ||
694 | /* | |
695 | * Blocks lu->tgt if all of the following conditions are met: | |
696 | * - Login, INQUIRY, and high-level SCSI setup of all of the target's | |
697 | * logical units have been finished (indicated by dont_block == 0). | |
698 | * - lu->generation is stale. | |
699 | * | |
700 | * Note, scsi_block_requests() must be called while holding card->lock, | |
701 | * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to | |
702 | * unblock the target. | |
703 | */ | |
704 | static void sbp2_conditionally_block(struct sbp2_logical_unit *lu) | |
705 | { | |
706 | struct sbp2_target *tgt = lu->tgt; | |
e5110d01 | 707 | struct fw_card *card = target_device(tgt)->card; |
2e2705bd SR |
708 | struct Scsi_Host *shost = |
709 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
710 | unsigned long flags; | |
711 | ||
712 | spin_lock_irqsave(&card->lock, flags); | |
713 | if (!tgt->dont_block && !lu->blocked && | |
714 | lu->generation != card->generation) { | |
715 | lu->blocked = true; | |
a5fd9ec7 | 716 | if (++tgt->blocked == 1) |
2e2705bd | 717 | scsi_block_requests(shost); |
2e2705bd SR |
718 | } |
719 | spin_unlock_irqrestore(&card->lock, flags); | |
720 | } | |
721 | ||
722 | /* | |
723 | * Unblocks lu->tgt as soon as all its logical units can be unblocked. | |
724 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
725 | * card->lock protected section. On the other hand, running it inside | |
726 | * the section might clash with shost->host_lock. | |
727 | */ | |
728 | static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu) | |
729 | { | |
730 | struct sbp2_target *tgt = lu->tgt; | |
e5110d01 | 731 | struct fw_card *card = target_device(tgt)->card; |
2e2705bd SR |
732 | struct Scsi_Host *shost = |
733 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
734 | unsigned long flags; | |
735 | bool unblock = false; | |
736 | ||
737 | spin_lock_irqsave(&card->lock, flags); | |
738 | if (lu->blocked && lu->generation == card->generation) { | |
739 | lu->blocked = false; | |
740 | unblock = --tgt->blocked == 0; | |
741 | } | |
742 | spin_unlock_irqrestore(&card->lock, flags); | |
743 | ||
a5fd9ec7 | 744 | if (unblock) |
2e2705bd | 745 | scsi_unblock_requests(shost); |
2e2705bd SR |
746 | } |
747 | ||
748 | /* | |
749 | * Prevents future blocking of tgt and unblocks it. | |
750 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
751 | * card->lock protected section. On the other hand, running it inside | |
752 | * the section might clash with shost->host_lock. | |
753 | */ | |
754 | static void sbp2_unblock(struct sbp2_target *tgt) | |
755 | { | |
e5110d01 | 756 | struct fw_card *card = target_device(tgt)->card; |
2e2705bd SR |
757 | struct Scsi_Host *shost = |
758 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
759 | unsigned long flags; | |
760 | ||
761 | spin_lock_irqsave(&card->lock, flags); | |
762 | ++tgt->dont_block; | |
763 | spin_unlock_irqrestore(&card->lock, flags); | |
764 | ||
765 | scsi_unblock_requests(shost); | |
766 | } | |
767 | ||
f8436158 SR |
768 | static int sbp2_lun2int(u16 lun) |
769 | { | |
770 | struct scsi_lun eight_bytes_lun; | |
771 | ||
772 | memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); | |
773 | eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff; | |
774 | eight_bytes_lun.scsi_lun[1] = lun & 0xff; | |
775 | ||
776 | return scsilun_to_int(&eight_bytes_lun); | |
777 | } | |
778 | ||
17cff9ff JW |
779 | /* |
780 | * Write retransmit retry values into the BUSY_TIMEOUT register. | |
781 | * - The single-phase retry protocol is supported by all SBP-2 devices, but the | |
782 | * default retry_limit value is 0 (i.e. never retry transmission). We write a | |
783 | * saner value after logging into the device. | |
784 | * - The dual-phase retry protocol is optional to implement, and if not | |
785 | * supported, writes to the dual-phase portion of the register will be | |
786 | * ignored. We try to write the original 1394-1995 default here. | |
787 | * - In the case of devices that are also SBP-3-compliant, all writes are | |
788 | * ignored, as the register is read-only, but contains single-phase retry of | |
789 | * 15, which is what we're trying to set for all SBP-2 device anyway, so this | |
790 | * write attempt is safe and yields more consistent behavior for all devices. | |
791 | * | |
792 | * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec, | |
793 | * and section 6.4 of the SBP-3 spec for further details. | |
794 | */ | |
51f9dbef JW |
795 | static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu) |
796 | { | |
e5110d01 | 797 | struct fw_device *device = target_device(lu->tgt); |
1e119fa9 | 798 | __be32 d = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT); |
51f9dbef | 799 | |
1e119fa9 JF |
800 | fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, |
801 | lu->tgt->node_id, lu->generation, device->max_speed, | |
e847cc83 | 802 | CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT, &d, 4); |
51f9dbef JW |
803 | } |
804 | ||
5a3c2be6 SR |
805 | static void sbp2_reconnect(struct work_struct *work); |
806 | ||
7f37c426 KH |
807 | static void sbp2_login(struct work_struct *work) |
808 | { | |
5a3c2be6 SR |
809 | struct sbp2_logical_unit *lu = |
810 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 | 811 | struct sbp2_target *tgt = lu->tgt; |
e5110d01 | 812 | struct fw_device *device = target_device(tgt); |
48f18c76 | 813 | struct Scsi_Host *shost; |
5a3c2be6 | 814 | struct scsi_device *sdev; |
7f37c426 | 815 | struct sbp2_login_response response; |
5a3c2be6 | 816 | int generation, node_id, local_node_id; |
7f37c426 | 817 | |
be6f48b0 | 818 | if (fw_device_is_shutdown(device)) |
6ff8147d | 819 | return; |
be6f48b0 | 820 | |
5a8a1bcd | 821 | generation = device->generation; |
621f6dd7 | 822 | smp_rmb(); /* node IDs must not be older than generation */ |
5a8a1bcd SR |
823 | node_id = device->node_id; |
824 | local_node_id = device->card->node_id; | |
7f37c426 | 825 | |
ce896d95 | 826 | /* If this is a re-login attempt, log out, or we might be rejected. */ |
f8436158 | 827 | if (lu->has_sdev) |
ce896d95 SR |
828 | sbp2_send_management_orb(lu, device->node_id, generation, |
829 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
830 | ||
5a3c2be6 SR |
831 | if (sbp2_send_management_orb(lu, node_id, generation, |
832 | SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { | |
2e2705bd | 833 | if (lu->retries++ < 5) { |
285838eb | 834 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
2e2705bd | 835 | } else { |
48f18c76 SR |
836 | fw_error("%s: failed to login to LUN %04x\n", |
837 | tgt->bus_id, lu->lun); | |
2e2705bd SR |
838 | /* Let any waiting I/O fail from now on. */ |
839 | sbp2_unblock(lu->tgt); | |
840 | } | |
6ff8147d | 841 | return; |
7f37c426 KH |
842 | } |
843 | ||
48f18c76 SR |
844 | tgt->node_id = node_id; |
845 | tgt->address_high = local_node_id << 16; | |
621f6dd7 SR |
846 | smp_wmb(); /* node IDs must not be older than generation */ |
847 | lu->generation = generation; | |
7f37c426 | 848 | |
5a3c2be6 | 849 | lu->command_block_agent_address = |
71ee9f01 SR |
850 | ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff) |
851 | << 32) | be32_to_cpu(response.command_block_agent.low); | |
852 | lu->login_id = be32_to_cpu(response.misc) & 0xffff; | |
7f37c426 | 853 | |
48f18c76 SR |
854 | fw_notify("%s: logged in to LUN %04x (%d retries)\n", |
855 | tgt->bus_id, lu->lun, lu->retries); | |
7f37c426 | 856 | |
51f9dbef JW |
857 | /* set appropriate retry limit(s) in BUSY_TIMEOUT register */ |
858 | sbp2_set_busy_timeout(lu); | |
7f37c426 | 859 | |
5a3c2be6 SR |
860 | PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect); |
861 | sbp2_agent_reset(lu); | |
862 | ||
0fa6dfdb | 863 | /* This was a re-login. */ |
f8436158 | 864 | if (lu->has_sdev) { |
0fa6dfdb | 865 | sbp2_cancel_orbs(lu); |
2e2705bd | 866 | sbp2_conditionally_unblock(lu); |
6ff8147d SR |
867 | |
868 | return; | |
0fa6dfdb SR |
869 | } |
870 | ||
9220f194 SR |
871 | if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) |
872 | ssleep(SBP2_INQUIRY_DELAY); | |
873 | ||
48f18c76 | 874 | shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
f8436158 | 875 | sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu); |
e80de370 SR |
876 | /* |
877 | * FIXME: We are unable to perform reconnects while in sbp2_login(). | |
878 | * Therefore __scsi_add_device() will get into trouble if a bus reset | |
879 | * happens in parallel. It will either fail or leave us with an | |
880 | * unusable sdev. As a workaround we check for this and retry the | |
881 | * whole login and SCSI probing. | |
882 | */ | |
1b9c12ba | 883 | |
e80de370 SR |
884 | /* Reported error during __scsi_add_device() */ |
885 | if (IS_ERR(sdev)) | |
886 | goto out_logout_login; | |
887 | ||
e80de370 SR |
888 | /* Unreported error during __scsi_add_device() */ |
889 | smp_rmb(); /* get current card generation */ | |
890 | if (generation != device->card->generation) { | |
891 | scsi_remove_device(sdev); | |
33f1c6c3 | 892 | scsi_device_put(sdev); |
e80de370 | 893 | goto out_logout_login; |
7f37c426 | 894 | } |
e80de370 SR |
895 | |
896 | /* No error during __scsi_add_device() */ | |
f8436158 SR |
897 | lu->has_sdev = true; |
898 | scsi_device_put(sdev); | |
2e2705bd | 899 | sbp2_allow_block(lu); |
6ff8147d SR |
900 | |
901 | return; | |
e80de370 SR |
902 | |
903 | out_logout_login: | |
904 | smp_rmb(); /* generation may have changed */ | |
905 | generation = device->generation; | |
906 | smp_rmb(); /* node_id must not be older than generation */ | |
907 | ||
908 | sbp2_send_management_orb(lu, device->node_id, generation, | |
909 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
910 | /* | |
911 | * If a bus reset happened, sbp2_update will have requeued | |
912 | * lu->work already. Reset the work from reconnect to login. | |
913 | */ | |
914 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); | |
7f37c426 | 915 | } |
9ba136d0 | 916 | |
b2af07b6 SR |
917 | static void sbp2_reconnect(struct work_struct *work) |
918 | { | |
919 | struct sbp2_logical_unit *lu = | |
920 | container_of(work, struct sbp2_logical_unit, work.work); | |
921 | struct sbp2_target *tgt = lu->tgt; | |
922 | struct fw_device *device = target_device(tgt); | |
923 | int generation, node_id, local_node_id; | |
924 | ||
925 | if (fw_device_is_shutdown(device)) | |
926 | return; | |
927 | ||
928 | generation = device->generation; | |
929 | smp_rmb(); /* node IDs must not be older than generation */ | |
930 | node_id = device->node_id; | |
931 | local_node_id = device->card->node_id; | |
932 | ||
933 | if (sbp2_send_management_orb(lu, node_id, generation, | |
934 | SBP2_RECONNECT_REQUEST, | |
935 | lu->login_id, NULL) < 0) { | |
936 | /* | |
937 | * If reconnect was impossible even though we are in the | |
938 | * current generation, fall back and try to log in again. | |
939 | * | |
940 | * We could check for "Function rejected" status, but | |
941 | * looking at the bus generation as simpler and more general. | |
942 | */ | |
943 | smp_rmb(); /* get current card generation */ | |
944 | if (generation == device->card->generation || | |
945 | lu->retries++ >= 5) { | |
946 | fw_error("%s: failed to reconnect\n", tgt->bus_id); | |
947 | lu->retries = 0; | |
948 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); | |
949 | } | |
950 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); | |
951 | ||
952 | return; | |
953 | } | |
954 | ||
955 | tgt->node_id = node_id; | |
956 | tgt->address_high = local_node_id << 16; | |
957 | smp_wmb(); /* node IDs must not be older than generation */ | |
958 | lu->generation = generation; | |
959 | ||
960 | fw_notify("%s: reconnected to LUN %04x (%d retries)\n", | |
961 | tgt->bus_id, lu->lun, lu->retries); | |
962 | ||
963 | sbp2_agent_reset(lu); | |
964 | sbp2_cancel_orbs(lu); | |
965 | sbp2_conditionally_unblock(lu); | |
966 | } | |
967 | ||
5a3c2be6 | 968 | static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) |
9ba136d0 | 969 | { |
5a3c2be6 | 970 | struct sbp2_logical_unit *lu; |
9ba136d0 | 971 | |
5a3c2be6 SR |
972 | lu = kmalloc(sizeof(*lu), GFP_KERNEL); |
973 | if (!lu) | |
974 | return -ENOMEM; | |
9ba136d0 | 975 | |
5a3c2be6 SR |
976 | lu->address_handler.length = 0x100; |
977 | lu->address_handler.address_callback = sbp2_status_write; | |
978 | lu->address_handler.callback_data = lu; | |
9ba136d0 | 979 | |
5a3c2be6 SR |
980 | if (fw_core_add_address_handler(&lu->address_handler, |
981 | &fw_high_memory_region) < 0) { | |
982 | kfree(lu); | |
983 | return -ENOMEM; | |
984 | } | |
9ba136d0 | 985 | |
f8436158 SR |
986 | lu->tgt = tgt; |
987 | lu->lun = lun_entry & 0xffff; | |
cd1f70fd | 988 | lu->login_id = INVALID_LOGIN_ID; |
f8436158 SR |
989 | lu->retries = 0; |
990 | lu->has_sdev = false; | |
991 | lu->blocked = false; | |
2e2705bd | 992 | ++tgt->dont_block; |
5a3c2be6 SR |
993 | INIT_LIST_HEAD(&lu->orb_list); |
994 | INIT_DELAYED_WORK(&lu->work, sbp2_login); | |
9ba136d0 | 995 | |
5a3c2be6 SR |
996 | list_add_tail(&lu->link, &tgt->lu_list); |
997 | return 0; | |
998 | } | |
ad85274f | 999 | |
13b302d0 SR |
1000 | static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, |
1001 | const u32 *directory) | |
5a3c2be6 SR |
1002 | { |
1003 | struct fw_csr_iterator ci; | |
1004 | int key, value; | |
9ba136d0 | 1005 | |
5a3c2be6 SR |
1006 | fw_csr_iterator_init(&ci, directory); |
1007 | while (fw_csr_iterator_next(&ci, &key, &value)) | |
1008 | if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && | |
1009 | sbp2_add_logical_unit(tgt, value) < 0) | |
1010 | return -ENOMEM; | |
1011 | return 0; | |
1012 | } | |
1013 | ||
13b302d0 | 1014 | static int sbp2_scan_unit_dir(struct sbp2_target *tgt, const u32 *directory, |
5a3c2be6 SR |
1015 | u32 *model, u32 *firmware_revision) |
1016 | { | |
1017 | struct fw_csr_iterator ci; | |
1018 | int key, value; | |
1019 | ||
1020 | fw_csr_iterator_init(&ci, directory); | |
9ba136d0 KH |
1021 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
1022 | switch (key) { | |
5a3c2be6 | 1023 | |
9ba136d0 | 1024 | case CSR_DEPENDENT_INFO | CSR_OFFSET: |
5a3c2be6 SR |
1025 | tgt->management_agent_address = |
1026 | CSR_REGISTER_BASE + 4 * value; | |
9ba136d0 | 1027 | break; |
5a3c2be6 SR |
1028 | |
1029 | case CSR_DIRECTORY_ID: | |
1030 | tgt->directory_id = value; | |
9ba136d0 | 1031 | break; |
5a3c2be6 | 1032 | |
9ba136d0 | 1033 | case CSR_MODEL: |
5a3c2be6 SR |
1034 | *model = value; |
1035 | break; | |
1036 | ||
1037 | case SBP2_CSR_FIRMWARE_REVISION: | |
1038 | *firmware_revision = value; | |
1039 | break; | |
1040 | ||
384170da JW |
1041 | case SBP2_CSR_UNIT_CHARACTERISTICS: |
1042 | /* the timeout value is stored in 500ms units */ | |
eaf76e0d | 1043 | tgt->mgt_orb_timeout = (value >> 8 & 0xff) * 500; |
384170da JW |
1044 | break; |
1045 | ||
5a3c2be6 SR |
1046 | case SBP2_CSR_LOGICAL_UNIT_NUMBER: |
1047 | if (sbp2_add_logical_unit(tgt, value) < 0) | |
1048 | return -ENOMEM; | |
1049 | break; | |
1050 | ||
1051 | case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: | |
0e3e2eab RS |
1052 | /* Adjust for the increment in the iterator */ |
1053 | if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0) | |
5a3c2be6 | 1054 | return -ENOMEM; |
9ba136d0 KH |
1055 | break; |
1056 | } | |
1057 | } | |
5a3c2be6 SR |
1058 | return 0; |
1059 | } | |
1060 | ||
eaf76e0d SR |
1061 | /* |
1062 | * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be | |
1063 | * provided in the config rom. Most devices do provide a value, which | |
1064 | * we'll use for login management orbs, but with some sane limits. | |
1065 | */ | |
1066 | static void sbp2_clamp_management_orb_timeout(struct sbp2_target *tgt) | |
1067 | { | |
1068 | unsigned int timeout = tgt->mgt_orb_timeout; | |
1069 | ||
1070 | if (timeout > 40000) | |
1071 | fw_notify("%s: %ds mgt_ORB_timeout limited to 40s\n", | |
1072 | tgt->bus_id, timeout / 1000); | |
1073 | ||
1074 | tgt->mgt_orb_timeout = clamp_val(timeout, 5000, 40000); | |
1075 | } | |
1076 | ||
5a3c2be6 SR |
1077 | static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, |
1078 | u32 firmware_revision) | |
1079 | { | |
1080 | int i; | |
05cca738 | 1081 | unsigned int w = sbp2_param_workarounds; |
2df222b8 SR |
1082 | |
1083 | if (w) | |
1084 | fw_notify("Please notify linux1394-devel@lists.sourceforge.net " | |
1085 | "if you need the workarounds parameter for %s\n", | |
48f18c76 | 1086 | tgt->bus_id); |
5a3c2be6 | 1087 | |
2df222b8 SR |
1088 | if (w & SBP2_WORKAROUND_OVERRIDE) |
1089 | goto out; | |
9ba136d0 KH |
1090 | |
1091 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
5a3c2be6 | 1092 | |
9ba136d0 KH |
1093 | if (sbp2_workarounds_table[i].firmware_revision != |
1094 | (firmware_revision & 0xffffff00)) | |
1095 | continue; | |
5a3c2be6 | 1096 | |
9ba136d0 | 1097 | if (sbp2_workarounds_table[i].model != model && |
f746072a | 1098 | sbp2_workarounds_table[i].model != SBP2_ROM_VALUE_WILDCARD) |
9ba136d0 | 1099 | continue; |
5a3c2be6 | 1100 | |
2df222b8 | 1101 | w |= sbp2_workarounds_table[i].workarounds; |
9ba136d0 KH |
1102 | break; |
1103 | } | |
2df222b8 SR |
1104 | out: |
1105 | if (w) | |
5a3c2be6 | 1106 | fw_notify("Workarounds for %s: 0x%x " |
9ba136d0 | 1107 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", |
48f18c76 | 1108 | tgt->bus_id, w, firmware_revision, model); |
2df222b8 | 1109 | tgt->workarounds = w; |
5a3c2be6 SR |
1110 | } |
1111 | ||
1112 | static struct scsi_host_template scsi_driver_template; | |
b2af07b6 | 1113 | static void sbp2_release_target(struct sbp2_target *tgt); |
5a3c2be6 SR |
1114 | |
1115 | static int sbp2_probe(struct device *dev) | |
1116 | { | |
1117 | struct fw_unit *unit = fw_unit(dev); | |
e5110d01 | 1118 | struct fw_device *device = fw_parent_device(unit); |
5a3c2be6 SR |
1119 | struct sbp2_target *tgt; |
1120 | struct sbp2_logical_unit *lu; | |
1121 | struct Scsi_Host *shost; | |
1122 | u32 model, firmware_revision; | |
1123 | ||
09b12dd4 SR |
1124 | if (dma_get_max_seg_size(device->card->device) > SBP2_MAX_SEG_SIZE) |
1125 | BUG_ON(dma_set_max_seg_size(device->card->device, | |
1126 | SBP2_MAX_SEG_SIZE)); | |
1127 | ||
5a3c2be6 SR |
1128 | shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); |
1129 | if (shost == NULL) | |
1130 | return -ENOMEM; | |
1131 | ||
1132 | tgt = (struct sbp2_target *)shost->hostdata; | |
d961450d | 1133 | dev_set_drvdata(&unit->device, tgt); |
5a3c2be6 | 1134 | tgt->unit = unit; |
5a3c2be6 | 1135 | INIT_LIST_HEAD(&tgt->lu_list); |
a1f64819 | 1136 | tgt->bus_id = dev_name(&unit->device); |
c9755e14 | 1137 | tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; |
5a3c2be6 SR |
1138 | |
1139 | if (fw_device_enable_phys_dma(device) < 0) | |
1140 | goto fail_shost_put; | |
1141 | ||
af271941 SR |
1142 | shost->max_cmd_len = SBP2_MAX_CDB_SIZE; |
1143 | ||
5a3c2be6 SR |
1144 | if (scsi_add_host(shost, &unit->device) < 0) |
1145 | goto fail_shost_put; | |
1146 | ||
5a3c2be6 SR |
1147 | /* implicit directory ID */ |
1148 | tgt->directory_id = ((unit->directory - device->config_rom) * 4 | |
1149 | + CSR_CONFIG_ROM) & 0xffffff; | |
1150 | ||
f746072a SR |
1151 | firmware_revision = SBP2_ROM_VALUE_MISSING; |
1152 | model = SBP2_ROM_VALUE_MISSING; | |
1153 | ||
5a3c2be6 SR |
1154 | if (sbp2_scan_unit_dir(tgt, unit->directory, &model, |
1155 | &firmware_revision) < 0) | |
6ff8147d | 1156 | goto fail_release_target; |
5a3c2be6 | 1157 | |
eaf76e0d | 1158 | sbp2_clamp_management_orb_timeout(tgt); |
5a3c2be6 | 1159 | sbp2_init_workarounds(tgt, model, firmware_revision); |
9ba136d0 | 1160 | |
a08e100a SR |
1161 | /* |
1162 | * At S100 we can do 512 bytes per packet, at S200 1024 bytes, | |
1163 | * and so on up to 4096 bytes. The SBP-2 max_payload field | |
1164 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
1165 | * if we set this to max_speed + 7, we get the right value. | |
1166 | */ | |
1167 | tgt->max_payload = min(device->max_speed + 7, 10U); | |
1168 | tgt->max_payload = min(tgt->max_payload, device->card->max_receive - 1); | |
1169 | ||
285838eb | 1170 | /* Do the login in a workqueue so we can easily reschedule retries. */ |
5a3c2be6 | 1171 | list_for_each_entry(lu, &tgt->lu_list, link) |
0dcfeb7e | 1172 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
6ff8147d | 1173 | |
9ba136d0 | 1174 | return 0; |
ad85274f | 1175 | |
6ff8147d SR |
1176 | fail_release_target: |
1177 | sbp2_release_target(tgt); | |
5a3c2be6 SR |
1178 | return -ENOMEM; |
1179 | ||
1180 | fail_shost_put: | |
1181 | scsi_host_put(shost); | |
1182 | return -ENOMEM; | |
9ba136d0 KH |
1183 | } |
1184 | ||
b2af07b6 | 1185 | static void sbp2_update(struct fw_unit *unit) |
9ba136d0 | 1186 | { |
d961450d | 1187 | struct sbp2_target *tgt = dev_get_drvdata(&unit->device); |
0278ccd9 CB |
1188 | struct sbp2_logical_unit *lu; |
1189 | ||
b2af07b6 | 1190 | fw_device_enable_phys_dma(fw_parent_device(unit)); |
6ff8147d | 1191 | |
b2af07b6 SR |
1192 | /* |
1193 | * Fw-core serializes sbp2_update() against sbp2_remove(). | |
1194 | * Iteration over tgt->lu_list is therefore safe here. | |
1195 | */ | |
1196 | list_for_each_entry(lu, &tgt->lu_list, link) { | |
1197 | sbp2_conditionally_block(lu); | |
1198 | lu->retries = 0; | |
1199 | sbp2_queue_work(lu, 0); | |
1200 | } | |
9ba136d0 KH |
1201 | } |
1202 | ||
b2af07b6 | 1203 | static void sbp2_release_target(struct sbp2_target *tgt) |
9ba136d0 | 1204 | { |
b2af07b6 SR |
1205 | struct sbp2_logical_unit *lu, *next; |
1206 | struct Scsi_Host *shost = | |
1207 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
1208 | struct scsi_device *sdev; | |
e5110d01 | 1209 | struct fw_device *device = target_device(tgt); |
be6f48b0 | 1210 | |
b2af07b6 SR |
1211 | /* prevent deadlocks */ |
1212 | sbp2_unblock(tgt); | |
9ba136d0 | 1213 | |
b2af07b6 SR |
1214 | list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { |
1215 | sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun)); | |
1216 | if (sdev) { | |
1217 | scsi_remove_device(sdev); | |
1218 | scsi_device_put(sdev); | |
7f37c426 | 1219 | } |
b2af07b6 SR |
1220 | if (lu->login_id != INVALID_LOGIN_ID) { |
1221 | int generation, node_id; | |
1222 | /* | |
1223 | * tgt->node_id may be obsolete here if we failed | |
1224 | * during initial login or after a bus reset where | |
1225 | * the topology changed. | |
1226 | */ | |
1227 | generation = device->generation; | |
1228 | smp_rmb(); /* node_id vs. generation */ | |
1229 | node_id = device->node_id; | |
1230 | sbp2_send_management_orb(lu, node_id, generation, | |
1231 | SBP2_LOGOUT_REQUEST, | |
1232 | lu->login_id, NULL); | |
1233 | } | |
1234 | fw_core_remove_address_handler(&lu->address_handler); | |
1235 | list_del(&lu->link); | |
1236 | kfree(lu); | |
7f37c426 | 1237 | } |
b2af07b6 SR |
1238 | scsi_remove_host(shost); |
1239 | fw_notify("released %s, target %d:0:0\n", tgt->bus_id, shost->host_no); | |
9ba136d0 | 1240 | |
b2af07b6 | 1241 | scsi_host_put(shost); |
9ba136d0 KH |
1242 | } |
1243 | ||
b2af07b6 | 1244 | static int sbp2_remove(struct device *dev) |
9ba136d0 | 1245 | { |
b2af07b6 | 1246 | struct fw_unit *unit = fw_unit(dev); |
d961450d | 1247 | struct sbp2_target *tgt = dev_get_drvdata(&unit->device); |
5a3c2be6 | 1248 | struct sbp2_logical_unit *lu; |
9ba136d0 | 1249 | |
b2af07b6 SR |
1250 | list_for_each_entry(lu, &tgt->lu_list, link) |
1251 | cancel_delayed_work_sync(&lu->work); | |
5a3c2be6 | 1252 | |
b2af07b6 SR |
1253 | sbp2_release_target(tgt); |
1254 | ||
1255 | return 0; | |
9ba136d0 KH |
1256 | } |
1257 | ||
1258 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
1259 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
1260 | ||
b3b29888 | 1261 | static const struct ieee1394_device_id sbp2_id_table[] = { |
9ba136d0 | 1262 | { |
b3b29888 SR |
1263 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | |
1264 | IEEE1394_MATCH_VERSION, | |
9ba136d0 | 1265 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, |
5af4e5ea | 1266 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
1267 | }, |
1268 | { } | |
1269 | }; | |
1270 | ||
1271 | static struct fw_driver sbp2_driver = { | |
1272 | .driver = { | |
1273 | .owner = THIS_MODULE, | |
1274 | .name = sbp2_driver_name, | |
1275 | .bus = &fw_bus_type, | |
1276 | .probe = sbp2_probe, | |
1277 | .remove = sbp2_remove, | |
1278 | }, | |
1279 | .update = sbp2_update, | |
1280 | .id_table = sbp2_id_table, | |
1281 | }; | |
1282 | ||
5e212567 SR |
1283 | static void sbp2_unmap_scatterlist(struct device *card_device, |
1284 | struct sbp2_command_orb *orb) | |
1285 | { | |
1286 | if (scsi_sg_count(orb->cmd)) | |
1287 | dma_unmap_sg(card_device, scsi_sglist(orb->cmd), | |
1288 | scsi_sg_count(orb->cmd), | |
1289 | orb->cmd->sc_data_direction); | |
1290 | ||
1291 | if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT)) | |
1292 | dma_unmap_single(card_device, orb->page_table_bus, | |
1293 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
1294 | } | |
1295 | ||
53dca511 | 1296 | static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) |
9ba136d0 | 1297 | { |
fbb5423c KH |
1298 | int sam_status; |
1299 | ||
9ba136d0 KH |
1300 | sense_data[0] = 0x70; |
1301 | sense_data[1] = 0x0; | |
1302 | sense_data[2] = sbp2_status[1]; | |
1303 | sense_data[3] = sbp2_status[4]; | |
1304 | sense_data[4] = sbp2_status[5]; | |
1305 | sense_data[5] = sbp2_status[6]; | |
1306 | sense_data[6] = sbp2_status[7]; | |
1307 | sense_data[7] = 10; | |
1308 | sense_data[8] = sbp2_status[8]; | |
1309 | sense_data[9] = sbp2_status[9]; | |
1310 | sense_data[10] = sbp2_status[10]; | |
1311 | sense_data[11] = sbp2_status[11]; | |
1312 | sense_data[12] = sbp2_status[2]; | |
1313 | sense_data[13] = sbp2_status[3]; | |
1314 | sense_data[14] = sbp2_status[12]; | |
1315 | sense_data[15] = sbp2_status[13]; | |
1316 | ||
fbb5423c | 1317 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 1318 | |
fbb5423c KH |
1319 | switch (sam_status) { |
1320 | case SAM_STAT_GOOD: | |
9ba136d0 | 1321 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 1322 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 1323 | case SAM_STAT_BUSY: |
9ba136d0 KH |
1324 | case SAM_STAT_RESERVATION_CONFLICT: |
1325 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
1326 | return DID_OK << 16 | sam_status; |
1327 | ||
9ba136d0 | 1328 | default: |
fbb5423c | 1329 | return DID_ERROR << 16; |
9ba136d0 KH |
1330 | } |
1331 | } | |
1332 | ||
53dca511 SR |
1333 | static void complete_command_orb(struct sbp2_orb *base_orb, |
1334 | struct sbp2_status *status) | |
9ba136d0 | 1335 | { |
6f061487 JF |
1336 | struct sbp2_command_orb *orb = |
1337 | container_of(base_orb, struct sbp2_command_orb, base); | |
e5110d01 | 1338 | struct fw_device *device = target_device(orb->lu->tgt); |
9ba136d0 KH |
1339 | int result; |
1340 | ||
1341 | if (status != NULL) { | |
a77754a7 | 1342 | if (STATUS_GET_DEAD(*status)) |
e0e60215 | 1343 | sbp2_agent_reset_no_wait(orb->lu); |
9ba136d0 | 1344 | |
a77754a7 | 1345 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 1346 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 1347 | result = DID_OK << 16; |
9ba136d0 KH |
1348 | break; |
1349 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 1350 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
1351 | break; |
1352 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
1353 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
1354 | default: | |
fbb5423c | 1355 | result = DID_ERROR << 16; |
9ba136d0 KH |
1356 | break; |
1357 | } | |
1358 | ||
a77754a7 KH |
1359 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
1360 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
1361 | orb->cmd->sense_buffer); |
1362 | } else { | |
c781c06d KH |
1363 | /* |
1364 | * If the orb completes with status == NULL, something | |
9ba136d0 | 1365 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
1366 | * or when sending the write (less likely). |
1367 | */ | |
fbb5423c | 1368 | result = DID_BUS_BUSY << 16; |
2e2705bd | 1369 | sbp2_conditionally_block(orb->lu); |
9ba136d0 KH |
1370 | } |
1371 | ||
1372 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 1373 | sizeof(orb->request), DMA_TO_DEVICE); |
5e212567 | 1374 | sbp2_unmap_scatterlist(device->card->device, orb); |
9ba136d0 | 1375 | |
fbb5423c | 1376 | orb->cmd->result = result; |
b75ca5ea | 1377 | orb->cmd->scsi_done(orb->cmd); |
9ba136d0 KH |
1378 | } |
1379 | ||
53dca511 SR |
1380 | static int sbp2_map_scatterlist(struct sbp2_command_orb *orb, |
1381 | struct fw_device *device, struct sbp2_logical_unit *lu) | |
9ba136d0 | 1382 | { |
09b12dd4 SR |
1383 | struct scatterlist *sg = scsi_sglist(orb->cmd); |
1384 | int i, n; | |
1385 | ||
1386 | n = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd), | |
1387 | orb->cmd->sc_data_direction); | |
1388 | if (n == 0) | |
95ffc5e3 | 1389 | goto fail; |
9ba136d0 | 1390 | |
c781c06d KH |
1391 | /* |
1392 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
1393 | * the scatter list by converting it to an immediate block |
1394 | * request. This is also a workaround for broken devices such | |
1395 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
1396 | * tables. |
1397 | */ | |
09b12dd4 | 1398 | if (n == 1) { |
71ee9f01 SR |
1399 | orb->request.data_descriptor.high = |
1400 | cpu_to_be32(lu->tgt->address_high); | |
1401 | orb->request.data_descriptor.low = | |
1402 | cpu_to_be32(sg_dma_address(sg)); | |
1403 | orb->request.misc |= | |
1404 | cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg))); | |
95ffc5e3 | 1405 | return 0; |
9ba136d0 KH |
1406 | } |
1407 | ||
09b12dd4 SR |
1408 | for_each_sg(sg, sg, n, i) { |
1409 | orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16); | |
1410 | orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg)); | |
9ba136d0 KH |
1411 | } |
1412 | ||
b4be016a SR |
1413 | orb->page_table_bus = |
1414 | dma_map_single(device->card->device, orb->page_table, | |
1415 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
8d8bb39b | 1416 | if (dma_mapping_error(device->card->device, orb->page_table_bus)) |
b4be016a | 1417 | goto fail_page_table; |
9ba136d0 | 1418 | |
c781c06d KH |
1419 | /* |
1420 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
1421 | * to fill in the node ID part of the address. All other |
1422 | * pointers assume that the data referenced reside on the | |
1423 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
1424 | * on other nodes so we need to put our ID in descriptor.high. |
1425 | */ | |
71ee9f01 SR |
1426 | orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high); |
1427 | orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus); | |
1428 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT | | |
09b12dd4 | 1429 | COMMAND_ORB_DATA_SIZE(n)); |
9ba136d0 | 1430 | |
95ffc5e3 KH |
1431 | return 0; |
1432 | ||
1433 | fail_page_table: | |
09b12dd4 SR |
1434 | dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd), |
1435 | scsi_sg_count(orb->cmd), orb->cmd->sc_data_direction); | |
95ffc5e3 KH |
1436 | fail: |
1437 | return -ENOMEM; | |
9ba136d0 KH |
1438 | } |
1439 | ||
9ba136d0 KH |
1440 | /* SCSI stack integration */ |
1441 | ||
b75ca5ea SR |
1442 | static int sbp2_scsi_queuecommand(struct Scsi_Host *shost, |
1443 | struct scsi_cmnd *cmd) | |
9ba136d0 | 1444 | { |
5a3c2be6 | 1445 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
e5110d01 | 1446 | struct fw_device *device = target_device(lu->tgt); |
9ba136d0 | 1447 | struct sbp2_command_orb *orb; |
4bbc1bdd | 1448 | int generation, retval = SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1449 | |
c781c06d KH |
1450 | /* |
1451 | * Bidirectional commands are not yet implemented, and unknown | |
1452 | * transfer direction not handled. | |
1453 | */ | |
9ba136d0 | 1454 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
8a8cea27 | 1455 | fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n"); |
e1b68c4d | 1456 | cmd->result = DID_ERROR << 16; |
b75ca5ea | 1457 | cmd->scsi_done(cmd); |
e1b68c4d | 1458 | return 0; |
9ba136d0 KH |
1459 | } |
1460 | ||
2d826cc5 | 1461 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
1462 | if (orb == NULL) { |
1463 | fw_notify("failed to alloc orb\n"); | |
5a3c2be6 | 1464 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 KH |
1465 | } |
1466 | ||
12f26aa1 KH |
1467 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
1468 | orb->base.rcode = -1; | |
e57d2011 | 1469 | kref_init(&orb->base.kref); |
b75ca5ea SR |
1470 | orb->lu = lu; |
1471 | orb->cmd = cmd; | |
a08e100a | 1472 | orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL); |
71ee9f01 | 1473 | orb->request.misc = cpu_to_be32( |
a08e100a | 1474 | COMMAND_ORB_MAX_PAYLOAD(lu->tgt->max_payload) | |
f1397490 | 1475 | COMMAND_ORB_SPEED(device->max_speed) | |
71ee9f01 | 1476 | COMMAND_ORB_NOTIFY); |
9ba136d0 KH |
1477 | |
1478 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
0d7dcbf2 | 1479 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION); |
9ba136d0 | 1480 | |
4bbc1bdd SR |
1481 | generation = device->generation; |
1482 | smp_rmb(); /* sbp2_map_scatterlist looks at tgt->address_high */ | |
1483 | ||
5a3c2be6 SR |
1484 | if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) |
1485 | goto out; | |
9ba136d0 | 1486 | |
64a87b24 | 1487 | memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len); |
9ba136d0 KH |
1488 | |
1489 | orb->base.callback = complete_command_orb; | |
8526392a SR |
1490 | orb->base.request_bus = |
1491 | dma_map_single(device->card->device, &orb->request, | |
1492 | sizeof(orb->request), DMA_TO_DEVICE); | |
5e212567 SR |
1493 | if (dma_mapping_error(device->card->device, orb->base.request_bus)) { |
1494 | sbp2_unmap_scatterlist(device->card->device, orb); | |
5a3c2be6 | 1495 | goto out; |
5e212567 | 1496 | } |
82eff9db | 1497 | |
4bbc1bdd | 1498 | sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation, |
5a3c2be6 SR |
1499 | lu->command_block_agent_address + SBP2_ORB_POINTER); |
1500 | retval = 0; | |
1501 | out: | |
e57d2011 | 1502 | kref_put(&orb->base.kref, free_orb); |
5a3c2be6 | 1503 | return retval; |
9ba136d0 KH |
1504 | } |
1505 | ||
cfb01381 SR |
1506 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1507 | { | |
5a3c2be6 | 1508 | struct sbp2_logical_unit *lu = sdev->hostdata; |
cfb01381 | 1509 | |
5513c5f6 SR |
1510 | /* (Re-)Adding logical units via the SCSI stack is not supported. */ |
1511 | if (!lu) | |
1512 | return -ENOSYS; | |
1513 | ||
cfb01381 SR |
1514 | sdev->allow_restart = 1; |
1515 | ||
8ac3a47c SR |
1516 | /* SBP-2 requires quadlet alignment of the data buffers. */ |
1517 | blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1); | |
465ff318 | 1518 | |
5a3c2be6 | 1519 | if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
cfb01381 | 1520 | sdev->inquiry_len = 36; |
5a3c2be6 | 1521 | |
cfb01381 SR |
1522 | return 0; |
1523 | } | |
1524 | ||
9ba136d0 KH |
1525 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1526 | { | |
5a3c2be6 | 1527 | struct sbp2_logical_unit *lu = sdev->hostdata; |
9ba136d0 | 1528 | |
cfb01381 SR |
1529 | sdev->use_10_for_rw = 1; |
1530 | ||
2635f96f SR |
1531 | if (sbp2_param_exclusive_login) |
1532 | sdev->manage_start_stop = 1; | |
1533 | ||
cfb01381 SR |
1534 | if (sdev->type == TYPE_ROM) |
1535 | sdev->use_10_for_ms = 1; | |
5a3c2be6 | 1536 | |
9ba136d0 | 1537 | if (sdev->type == TYPE_DISK && |
5a3c2be6 | 1538 | lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
9ba136d0 | 1539 | sdev->skip_ms_page_8 = 1; |
5a3c2be6 SR |
1540 | |
1541 | if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) | |
9ba136d0 | 1542 | sdev->fix_capacity = 1; |
5a3c2be6 | 1543 | |
ffcaade3 SR |
1544 | if (lu->tgt->workarounds & SBP2_WORKAROUND_POWER_CONDITION) |
1545 | sdev->start_stop_pwr_cond = 1; | |
1546 | ||
5a3c2be6 | 1547 | if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
086fa5ff | 1548 | blk_queue_max_hw_sectors(sdev->request_queue, 128 * 1024 / 512); |
5a3c2be6 | 1549 | |
09b12dd4 SR |
1550 | blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE); |
1551 | ||
9ba136d0 KH |
1552 | return 0; |
1553 | } | |
1554 | ||
1555 | /* | |
1556 | * Called by scsi stack when something has really gone wrong. Usually | |
1557 | * called when a command has timed-out for some reason. | |
1558 | */ | |
1559 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1560 | { | |
5a3c2be6 | 1561 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
9ba136d0 | 1562 | |
48f18c76 | 1563 | fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id); |
5a3c2be6 SR |
1564 | sbp2_agent_reset(lu); |
1565 | sbp2_cancel_orbs(lu); | |
9ba136d0 KH |
1566 | |
1567 | return SUCCESS; | |
1568 | } | |
1569 | ||
14e21986 SR |
1570 | /* |
1571 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: | |
1572 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) | |
1573 | * | |
1574 | * This is the concatenation of target port identifier and logical unit | |
1575 | * identifier as per SAM-2...SAM-4 annex A. | |
1576 | */ | |
53dca511 SR |
1577 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
1578 | struct device_attribute *attr, char *buf) | |
14e21986 SR |
1579 | { |
1580 | struct scsi_device *sdev = to_scsi_device(dev); | |
5a3c2be6 | 1581 | struct sbp2_logical_unit *lu; |
14e21986 SR |
1582 | |
1583 | if (!sdev) | |
1584 | return 0; | |
14e21986 | 1585 | |
5a3c2be6 | 1586 | lu = sdev->hostdata; |
14e21986 | 1587 | |
c9755e14 SR |
1588 | return sprintf(buf, "%016llx:%06x:%04x\n", |
1589 | (unsigned long long)lu->tgt->guid, | |
5a3c2be6 | 1590 | lu->tgt->directory_id, lu->lun); |
14e21986 SR |
1591 | } |
1592 | ||
1593 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
1594 | ||
1595 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { | |
1596 | &dev_attr_ieee1394_id, | |
1597 | NULL | |
1598 | }; | |
1599 | ||
9ba136d0 KH |
1600 | static struct scsi_host_template scsi_driver_template = { |
1601 | .module = THIS_MODULE, | |
1602 | .name = "SBP-2 IEEE-1394", | |
b02b6bc4 | 1603 | .proc_name = sbp2_driver_name, |
9ba136d0 | 1604 | .queuecommand = sbp2_scsi_queuecommand, |
cfb01381 | 1605 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1606 | .slave_configure = sbp2_scsi_slave_configure, |
1607 | .eh_abort_handler = sbp2_scsi_abort, | |
1608 | .this_id = -1, | |
1609 | .sg_tablesize = SG_ALL, | |
1610 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1611 | .cmd_per_lun = 1, |
1612 | .can_queue = 1, | |
14e21986 | 1613 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
9ba136d0 KH |
1614 | }; |
1615 | ||
9ba136d0 KH |
1616 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1617 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1618 | MODULE_LICENSE("GPL"); | |
1619 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1620 | ||
1e4c7b0d OH |
1621 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1622 | #ifndef CONFIG_IEEE1394_SBP2_MODULE | |
1623 | MODULE_ALIAS("sbp2"); | |
1624 | #endif | |
1625 | ||
9ba136d0 KH |
1626 | static int __init sbp2_init(void) |
1627 | { | |
1628 | return driver_register(&sbp2_driver.driver); | |
1629 | } | |
1630 | ||
1631 | static void __exit sbp2_cleanup(void) | |
1632 | { | |
1633 | driver_unregister(&sbp2_driver.driver); | |
1634 | } | |
1635 | ||
1636 | module_init(sbp2_init); | |
1637 | module_exit(sbp2_cleanup); |