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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 | 128 | /* I don't know why the SCSI stack doesn't define something like this... */ |
a98e2719 | 129 | typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); |
9ba136d0 KH |
130 | |
131 | static const char sbp2_driver_name[] = "sbp2"; | |
132 | ||
5a3c2be6 SR |
133 | /* |
134 | * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry | |
135 | * and one struct scsi_device per sbp2_logical_unit. | |
136 | */ | |
137 | struct sbp2_logical_unit { | |
138 | struct sbp2_target *tgt; | |
139 | struct list_head link; | |
9ba136d0 KH |
140 | struct fw_address_handler address_handler; |
141 | struct list_head orb_list; | |
5a3c2be6 | 142 | |
9ba136d0 | 143 | u64 command_block_agent_address; |
5a3c2be6 | 144 | u16 lun; |
9ba136d0 KH |
145 | int login_id; |
146 | ||
c781c06d | 147 | /* |
5a3c2be6 SR |
148 | * The generation is updated once we've logged in or reconnected |
149 | * to the logical unit. Thus, I/O to the device will automatically | |
150 | * fail and get retried if it happens in a window where the device | |
151 | * is not ready, e.g. after a bus reset but before we reconnect. | |
c781c06d | 152 | */ |
9ba136d0 | 153 | int generation; |
7f37c426 KH |
154 | int retries; |
155 | struct delayed_work work; | |
f8436158 | 156 | bool has_sdev; |
2e2705bd | 157 | bool blocked; |
9ba136d0 KH |
158 | }; |
159 | ||
5a3c2be6 SR |
160 | /* |
161 | * We create one struct sbp2_target per IEEE 1212 Unit Directory | |
162 | * and one struct Scsi_Host per sbp2_target. | |
163 | */ | |
164 | struct sbp2_target { | |
165 | struct kref kref; | |
166 | struct fw_unit *unit; | |
48f18c76 | 167 | const char *bus_id; |
05cca738 | 168 | struct list_head lu_list; |
5a3c2be6 SR |
169 | |
170 | u64 management_agent_address; | |
c9755e14 | 171 | u64 guid; |
5a3c2be6 SR |
172 | int directory_id; |
173 | int node_id; | |
174 | int address_high; | |
05cca738 | 175 | unsigned int workarounds; |
384170da | 176 | unsigned int mgt_orb_timeout; |
a08e100a | 177 | unsigned int max_payload; |
2e2705bd SR |
178 | |
179 | int dont_block; /* counter for each logical unit */ | |
180 | int blocked; /* ditto */ | |
5a3c2be6 SR |
181 | }; |
182 | ||
e5110d01 SR |
183 | static struct fw_device *target_device(struct sbp2_target *tgt) |
184 | { | |
185 | return fw_parent_device(tgt->unit); | |
186 | } | |
187 | ||
cd1f70fd JF |
188 | /* Impossible login_id, to detect logout attempt before successful login */ |
189 | #define INVALID_LOGIN_ID 0x10000 | |
190 | ||
eaf76e0d | 191 | #define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */ |
9ba136d0 | 192 | #define SBP2_ORB_NULL 0x80000000 |
17cff9ff JW |
193 | #define SBP2_RETRY_LIMIT 0xf /* 15 retries */ |
194 | #define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */ | |
9ba136d0 | 195 | |
af271941 SR |
196 | /* |
197 | * There is no transport protocol limit to the CDB length, but we implement | |
198 | * a fixed length only. 16 bytes is enough for disks larger than 2 TB. | |
199 | */ | |
200 | #define SBP2_MAX_CDB_SIZE 16 | |
201 | ||
09b12dd4 SR |
202 | /* |
203 | * The default maximum s/g segment size of a FireWire controller is | |
204 | * usually 0x10000, but SBP-2 only allows 0xffff. Since buffers have to | |
205 | * be quadlet-aligned, we set the length limit to 0xffff & ~3. | |
206 | */ | |
207 | #define SBP2_MAX_SEG_SIZE 0xfffc | |
208 | ||
9ba136d0 | 209 | /* Unit directory keys */ |
384170da | 210 | #define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a |
5a3c2be6 SR |
211 | #define SBP2_CSR_FIRMWARE_REVISION 0x3c |
212 | #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 | |
213 | #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 | |
9ba136d0 | 214 | |
9ba136d0 KH |
215 | /* Management orb opcodes */ |
216 | #define SBP2_LOGIN_REQUEST 0x0 | |
217 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
218 | #define SBP2_RECONNECT_REQUEST 0x3 | |
219 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
220 | #define SBP2_LOGOUT_REQUEST 0x7 | |
221 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
222 | #define SBP2_ABORT_TASK_SET 0xc | |
223 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
224 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
225 | ||
226 | /* Offsets for command block agent registers */ | |
227 | #define SBP2_AGENT_STATE 0x00 | |
228 | #define SBP2_AGENT_RESET 0x04 | |
229 | #define SBP2_ORB_POINTER 0x08 | |
230 | #define SBP2_DOORBELL 0x10 | |
231 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
232 | ||
233 | /* Status write response codes */ | |
234 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
235 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
236 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
237 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
238 | ||
a77754a7 KH |
239 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
240 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) | |
241 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) | |
242 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) | |
243 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) | |
244 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) | |
245 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) | |
246 | #define STATUS_GET_DATA(v) ((v).data) | |
9ba136d0 KH |
247 | |
248 | struct sbp2_status { | |
249 | u32 status; | |
250 | u32 orb_low; | |
251 | u8 data[24]; | |
252 | }; | |
253 | ||
254 | struct sbp2_pointer { | |
71ee9f01 SR |
255 | __be32 high; |
256 | __be32 low; | |
9ba136d0 KH |
257 | }; |
258 | ||
259 | struct sbp2_orb { | |
260 | struct fw_transaction t; | |
e57d2011 | 261 | struct kref kref; |
9ba136d0 KH |
262 | dma_addr_t request_bus; |
263 | int rcode; | |
264 | struct sbp2_pointer pointer; | |
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; | |
317 | scsi_done_fn_t done; | |
5a3c2be6 | 318 | struct sbp2_logical_unit *lu; |
9ba136d0 | 319 | |
9fb2dd12 | 320 | struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); |
9ba136d0 | 321 | dma_addr_t page_table_bus; |
9ba136d0 KH |
322 | }; |
323 | ||
f746072a SR |
324 | #define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */ |
325 | #define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */ | |
326 | ||
9ba136d0 KH |
327 | /* |
328 | * List of devices with known bugs. | |
329 | * | |
330 | * The firmware_revision field, masked with 0xffff00, is the best | |
331 | * indicator for the type of bridge chip of a device. It yields a few | |
332 | * false positives but this did not break correctly behaving devices | |
f746072a | 333 | * so far. |
9ba136d0 KH |
334 | */ |
335 | static const struct { | |
336 | u32 firmware_revision; | |
337 | u32 model; | |
05cca738 | 338 | unsigned int workarounds; |
9ba136d0 KH |
339 | } sbp2_workarounds_table[] = { |
340 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
341 | .firmware_revision = 0x002800, | |
342 | .model = 0x001010, | |
343 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
ffcaade3 SR |
344 | SBP2_WORKAROUND_MODE_SENSE_8 | |
345 | SBP2_WORKAROUND_POWER_CONDITION, | |
9ba136d0 | 346 | }, |
9220f194 SR |
347 | /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { |
348 | .firmware_revision = 0x002800, | |
349 | .model = 0x000000, | |
3c5f8035 | 350 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
9220f194 | 351 | }, |
9ba136d0 KH |
352 | /* Initio bridges, actually only needed for some older ones */ { |
353 | .firmware_revision = 0x000200, | |
f746072a | 354 | .model = SBP2_ROM_VALUE_WILDCARD, |
9ba136d0 KH |
355 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
356 | }, | |
ffcaade3 SR |
357 | /* PL-3507 bridge with Prolific firmware */ { |
358 | .firmware_revision = 0x012800, | |
f746072a | 359 | .model = SBP2_ROM_VALUE_WILDCARD, |
ffcaade3 SR |
360 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
361 | }, | |
9ba136d0 KH |
362 | /* Symbios bridge */ { |
363 | .firmware_revision = 0xa0b800, | |
f746072a | 364 | .model = SBP2_ROM_VALUE_WILDCARD, |
9ba136d0 KH |
365 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
366 | }, | |
2aa9ff7f SR |
367 | /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ { |
368 | .firmware_revision = 0x002600, | |
f746072a | 369 | .model = SBP2_ROM_VALUE_WILDCARD, |
2aa9ff7f SR |
370 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
371 | }, | |
c781c06d | 372 | /* |
c8c4707c SR |
373 | * iPod 2nd generation: needs 128k max transfer size workaround |
374 | * iPod 3rd generation: needs fix capacity workaround | |
c781c06d | 375 | */ |
c8c4707c SR |
376 | { |
377 | .firmware_revision = 0x0a2700, | |
378 | .model = 0x000000, | |
379 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS | | |
380 | SBP2_WORKAROUND_FIX_CAPACITY, | |
381 | }, | |
382 | /* iPod 4th generation */ { | |
9ba136d0 KH |
383 | .firmware_revision = 0x0a2700, |
384 | .model = 0x000021, | |
385 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
386 | }, | |
031bb27c SR |
387 | /* iPod mini */ { |
388 | .firmware_revision = 0x0a2700, | |
389 | .model = 0x000022, | |
390 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
391 | }, | |
9ba136d0 KH |
392 | /* iPod mini */ { |
393 | .firmware_revision = 0x0a2700, | |
394 | .model = 0x000023, | |
395 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
396 | }, | |
397 | /* iPod Photo */ { | |
398 | .firmware_revision = 0x0a2700, | |
399 | .model = 0x00007e, | |
400 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
401 | } | |
402 | }; | |
403 | ||
53dca511 | 404 | static void free_orb(struct kref *kref) |
e57d2011 KH |
405 | { |
406 | struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); | |
407 | ||
408 | kfree(orb); | |
409 | } | |
410 | ||
53dca511 SR |
411 | static void sbp2_status_write(struct fw_card *card, struct fw_request *request, |
412 | int tcode, int destination, int source, | |
413 | int generation, int speed, | |
414 | unsigned long long offset, | |
415 | void *payload, size_t length, void *callback_data) | |
9ba136d0 | 416 | { |
5a3c2be6 | 417 | struct sbp2_logical_unit *lu = callback_data; |
9ba136d0 KH |
418 | struct sbp2_orb *orb; |
419 | struct sbp2_status status; | |
9ba136d0 KH |
420 | unsigned long flags; |
421 | ||
422 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
094614fc | 423 | length < 8 || length > sizeof(status)) { |
9ba136d0 KH |
424 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
425 | return; | |
426 | } | |
427 | ||
094614fc SR |
428 | status.status = be32_to_cpup(payload); |
429 | status.orb_low = be32_to_cpup(payload + 4); | |
430 | memset(status.data, 0, sizeof(status.data)); | |
431 | if (length > 8) | |
432 | memcpy(status.data, payload + 8, length - 8); | |
433 | ||
a77754a7 | 434 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
9ba136d0 KH |
435 | fw_notify("non-orb related status write, not handled\n"); |
436 | fw_send_response(card, request, RCODE_COMPLETE); | |
437 | return; | |
438 | } | |
439 | ||
440 | /* Lookup the orb corresponding to this status write. */ | |
441 | spin_lock_irqsave(&card->lock, flags); | |
5a3c2be6 | 442 | list_for_each_entry(orb, &lu->orb_list, link) { |
a77754a7 | 443 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
e57d2011 KH |
444 | STATUS_GET_ORB_LOW(status) == orb->request_bus) { |
445 | orb->rcode = RCODE_COMPLETE; | |
9ba136d0 KH |
446 | list_del(&orb->link); |
447 | break; | |
448 | } | |
449 | } | |
450 | spin_unlock_irqrestore(&card->lock, flags); | |
451 | ||
baed6b82 | 452 | if (&orb->link != &lu->orb_list) { |
9ba136d0 | 453 | orb->callback(orb, &status); |
baed6b82 SR |
454 | kref_put(&orb->kref, free_orb); |
455 | } else { | |
9ba136d0 | 456 | fw_error("status write for unknown orb\n"); |
baed6b82 | 457 | } |
e57d2011 | 458 | |
9ba136d0 KH |
459 | fw_send_response(card, request, RCODE_COMPLETE); |
460 | } | |
461 | ||
53dca511 SR |
462 | static void complete_transaction(struct fw_card *card, int rcode, |
463 | void *payload, size_t length, void *data) | |
9ba136d0 KH |
464 | { |
465 | struct sbp2_orb *orb = data; | |
466 | unsigned long flags; | |
467 | ||
e57d2011 KH |
468 | /* |
469 | * This is a little tricky. We can get the status write for | |
470 | * the orb before we get this callback. The status write | |
471 | * handler above will assume the orb pointer transaction was | |
472 | * successful and set the rcode to RCODE_COMPLETE for the orb. | |
473 | * So this callback only sets the rcode if it hasn't already | |
474 | * been set and only does the cleanup if the transaction | |
475 | * failed and we didn't already get a status write. | |
476 | */ | |
477 | spin_lock_irqsave(&card->lock, flags); | |
478 | ||
479 | if (orb->rcode == -1) | |
480 | orb->rcode = rcode; | |
481 | if (orb->rcode != RCODE_COMPLETE) { | |
9ba136d0 | 482 | list_del(&orb->link); |
1b34e974 | 483 | spin_unlock_irqrestore(&card->lock, flags); |
9ba136d0 | 484 | orb->callback(orb, NULL); |
1b34e974 SR |
485 | } else { |
486 | spin_unlock_irqrestore(&card->lock, flags); | |
9ba136d0 | 487 | } |
e57d2011 | 488 | |
e57d2011 | 489 | kref_put(&orb->kref, free_orb); |
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); |
9ba136d0 KH |
496 | unsigned long flags; |
497 | ||
498 | orb->pointer.high = 0; | |
71ee9f01 | 499 | orb->pointer.low = cpu_to_be32(orb->request_bus); |
9ba136d0 KH |
500 | |
501 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 502 | list_add_tail(&orb->link, &lu->orb_list); |
9ba136d0 KH |
503 | spin_unlock_irqrestore(&device->card->lock, flags); |
504 | ||
e57d2011 KH |
505 | /* Take a ref for the orb list and for the transaction callback. */ |
506 | kref_get(&orb->kref); | |
507 | kref_get(&orb->kref); | |
508 | ||
9ba136d0 | 509 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
f1397490 | 510 | node_id, generation, device->max_speed, offset, |
2d826cc5 | 511 | &orb->pointer, sizeof(orb->pointer), |
9ba136d0 KH |
512 | complete_transaction, orb); |
513 | } | |
514 | ||
5a3c2be6 | 515 | static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |
9ba136d0 | 516 | { |
e5110d01 | 517 | struct fw_device *device = target_device(lu->tgt); |
9ba136d0 KH |
518 | struct sbp2_orb *orb, *next; |
519 | struct list_head list; | |
520 | unsigned long flags; | |
2aaad97b | 521 | int retval = -ENOENT; |
9ba136d0 KH |
522 | |
523 | INIT_LIST_HEAD(&list); | |
524 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 525 | list_splice_init(&lu->orb_list, &list); |
9ba136d0 KH |
526 | spin_unlock_irqrestore(&device->card->lock, flags); |
527 | ||
528 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 529 | retval = 0; |
730c32f5 KH |
530 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
531 | continue; | |
532 | ||
9ba136d0 KH |
533 | orb->rcode = RCODE_CANCELLED; |
534 | orb->callback(orb, NULL); | |
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, | |
657 | &d, sizeof(d)); | |
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, | |
1e119fa9 | 679 | &d, sizeof(d), 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 | ||
5a3c2be6 | 779 | static void sbp2_release_target(struct kref *kref) |
b3d6e151 | 780 | { |
5a3c2be6 SR |
781 | struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref); |
782 | struct sbp2_logical_unit *lu, *next; | |
783 | struct Scsi_Host *shost = | |
784 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
f8436158 | 785 | struct scsi_device *sdev; |
e5110d01 | 786 | struct fw_device *device = target_device(tgt); |
5a3c2be6 | 787 | |
2e2705bd SR |
788 | /* prevent deadlocks */ |
789 | sbp2_unblock(tgt); | |
790 | ||
5a3c2be6 | 791 | list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { |
f8436158 SR |
792 | sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun)); |
793 | if (sdev) { | |
794 | scsi_remove_device(sdev); | |
795 | scsi_device_put(sdev); | |
33f1c6c3 | 796 | } |
cd1f70fd JF |
797 | if (lu->login_id != INVALID_LOGIN_ID) { |
798 | int generation, node_id; | |
799 | /* | |
800 | * tgt->node_id may be obsolete here if we failed | |
801 | * during initial login or after a bus reset where | |
802 | * the topology changed. | |
803 | */ | |
804 | generation = device->generation; | |
805 | smp_rmb(); /* node_id vs. generation */ | |
806 | node_id = device->node_id; | |
807 | sbp2_send_management_orb(lu, node_id, generation, | |
808 | SBP2_LOGOUT_REQUEST, | |
809 | lu->login_id, NULL); | |
810 | } | |
5a3c2be6 SR |
811 | fw_core_remove_address_handler(&lu->address_handler); |
812 | list_del(&lu->link); | |
813 | kfree(lu); | |
814 | } | |
815 | scsi_remove_host(shost); | |
f32ddadd | 816 | fw_notify("released %s, target %d:0:0\n", tgt->bus_id, shost->host_no); |
5a3c2be6 | 817 | |
1dc3bea7 | 818 | fw_unit_put(tgt->unit); |
5a3c2be6 | 819 | scsi_host_put(shost); |
855c603d | 820 | fw_device_put(device); |
b3d6e151 KH |
821 | } |
822 | ||
9fb551bf SR |
823 | static void sbp2_target_get(struct sbp2_target *tgt) |
824 | { | |
825 | kref_get(&tgt->kref); | |
826 | } | |
df8ec249 | 827 | |
cd1f70fd JF |
828 | static void sbp2_target_put(struct sbp2_target *tgt) |
829 | { | |
830 | kref_put(&tgt->kref, sbp2_release_target); | |
831 | } | |
832 | ||
9fb551bf SR |
833 | static struct workqueue_struct *sbp2_wq; |
834 | ||
285838eb SR |
835 | /* |
836 | * Always get the target's kref when scheduling work on one its units. | |
837 | * Each workqueue job is responsible to call sbp2_target_put() upon return. | |
838 | */ | |
839 | static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay) | |
840 | { | |
9fb551bf | 841 | sbp2_target_get(lu->tgt); |
cd1f70fd JF |
842 | if (!queue_delayed_work(sbp2_wq, &lu->work, delay)) |
843 | sbp2_target_put(lu->tgt); | |
285838eb SR |
844 | } |
845 | ||
17cff9ff JW |
846 | /* |
847 | * Write retransmit retry values into the BUSY_TIMEOUT register. | |
848 | * - The single-phase retry protocol is supported by all SBP-2 devices, but the | |
849 | * default retry_limit value is 0 (i.e. never retry transmission). We write a | |
850 | * saner value after logging into the device. | |
851 | * - The dual-phase retry protocol is optional to implement, and if not | |
852 | * supported, writes to the dual-phase portion of the register will be | |
853 | * ignored. We try to write the original 1394-1995 default here. | |
854 | * - In the case of devices that are also SBP-3-compliant, all writes are | |
855 | * ignored, as the register is read-only, but contains single-phase retry of | |
856 | * 15, which is what we're trying to set for all SBP-2 device anyway, so this | |
857 | * write attempt is safe and yields more consistent behavior for all devices. | |
858 | * | |
859 | * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec, | |
860 | * and section 6.4 of the SBP-3 spec for further details. | |
861 | */ | |
51f9dbef JW |
862 | static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu) |
863 | { | |
e5110d01 | 864 | struct fw_device *device = target_device(lu->tgt); |
1e119fa9 | 865 | __be32 d = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT); |
51f9dbef | 866 | |
1e119fa9 JF |
867 | fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, |
868 | lu->tgt->node_id, lu->generation, device->max_speed, | |
869 | CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT, | |
870 | &d, sizeof(d)); | |
51f9dbef JW |
871 | } |
872 | ||
5a3c2be6 SR |
873 | static void sbp2_reconnect(struct work_struct *work); |
874 | ||
7f37c426 KH |
875 | static void sbp2_login(struct work_struct *work) |
876 | { | |
5a3c2be6 SR |
877 | struct sbp2_logical_unit *lu = |
878 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 | 879 | struct sbp2_target *tgt = lu->tgt; |
e5110d01 | 880 | struct fw_device *device = target_device(tgt); |
48f18c76 | 881 | struct Scsi_Host *shost; |
5a3c2be6 | 882 | struct scsi_device *sdev; |
7f37c426 | 883 | struct sbp2_login_response response; |
5a3c2be6 | 884 | int generation, node_id, local_node_id; |
7f37c426 | 885 | |
be6f48b0 SR |
886 | if (fw_device_is_shutdown(device)) |
887 | goto out; | |
888 | ||
5a8a1bcd | 889 | generation = device->generation; |
621f6dd7 | 890 | smp_rmb(); /* node IDs must not be older than generation */ |
5a8a1bcd SR |
891 | node_id = device->node_id; |
892 | local_node_id = device->card->node_id; | |
7f37c426 | 893 | |
ce896d95 | 894 | /* If this is a re-login attempt, log out, or we might be rejected. */ |
f8436158 | 895 | if (lu->has_sdev) |
ce896d95 SR |
896 | sbp2_send_management_orb(lu, device->node_id, generation, |
897 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
898 | ||
5a3c2be6 SR |
899 | if (sbp2_send_management_orb(lu, node_id, generation, |
900 | SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { | |
2e2705bd | 901 | if (lu->retries++ < 5) { |
285838eb | 902 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
2e2705bd | 903 | } else { |
48f18c76 SR |
904 | fw_error("%s: failed to login to LUN %04x\n", |
905 | tgt->bus_id, lu->lun); | |
2e2705bd SR |
906 | /* Let any waiting I/O fail from now on. */ |
907 | sbp2_unblock(lu->tgt); | |
908 | } | |
285838eb | 909 | goto out; |
7f37c426 KH |
910 | } |
911 | ||
48f18c76 SR |
912 | tgt->node_id = node_id; |
913 | tgt->address_high = local_node_id << 16; | |
621f6dd7 SR |
914 | smp_wmb(); /* node IDs must not be older than generation */ |
915 | lu->generation = generation; | |
7f37c426 | 916 | |
5a3c2be6 | 917 | lu->command_block_agent_address = |
71ee9f01 SR |
918 | ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff) |
919 | << 32) | be32_to_cpu(response.command_block_agent.low); | |
920 | lu->login_id = be32_to_cpu(response.misc) & 0xffff; | |
7f37c426 | 921 | |
48f18c76 SR |
922 | fw_notify("%s: logged in to LUN %04x (%d retries)\n", |
923 | tgt->bus_id, lu->lun, lu->retries); | |
7f37c426 | 924 | |
51f9dbef JW |
925 | /* set appropriate retry limit(s) in BUSY_TIMEOUT register */ |
926 | sbp2_set_busy_timeout(lu); | |
7f37c426 | 927 | |
5a3c2be6 SR |
928 | PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect); |
929 | sbp2_agent_reset(lu); | |
930 | ||
0fa6dfdb | 931 | /* This was a re-login. */ |
f8436158 | 932 | if (lu->has_sdev) { |
0fa6dfdb | 933 | sbp2_cancel_orbs(lu); |
2e2705bd | 934 | sbp2_conditionally_unblock(lu); |
0fa6dfdb SR |
935 | goto out; |
936 | } | |
937 | ||
9220f194 SR |
938 | if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) |
939 | ssleep(SBP2_INQUIRY_DELAY); | |
940 | ||
48f18c76 | 941 | shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
f8436158 | 942 | sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu); |
e80de370 SR |
943 | /* |
944 | * FIXME: We are unable to perform reconnects while in sbp2_login(). | |
945 | * Therefore __scsi_add_device() will get into trouble if a bus reset | |
946 | * happens in parallel. It will either fail or leave us with an | |
947 | * unusable sdev. As a workaround we check for this and retry the | |
948 | * whole login and SCSI probing. | |
949 | */ | |
1b9c12ba | 950 | |
e80de370 SR |
951 | /* Reported error during __scsi_add_device() */ |
952 | if (IS_ERR(sdev)) | |
953 | goto out_logout_login; | |
954 | ||
e80de370 SR |
955 | /* Unreported error during __scsi_add_device() */ |
956 | smp_rmb(); /* get current card generation */ | |
957 | if (generation != device->card->generation) { | |
958 | scsi_remove_device(sdev); | |
33f1c6c3 | 959 | scsi_device_put(sdev); |
e80de370 | 960 | goto out_logout_login; |
7f37c426 | 961 | } |
e80de370 SR |
962 | |
963 | /* No error during __scsi_add_device() */ | |
f8436158 SR |
964 | lu->has_sdev = true; |
965 | scsi_device_put(sdev); | |
2e2705bd | 966 | sbp2_allow_block(lu); |
e80de370 SR |
967 | goto out; |
968 | ||
969 | out_logout_login: | |
970 | smp_rmb(); /* generation may have changed */ | |
971 | generation = device->generation; | |
972 | smp_rmb(); /* node_id must not be older than generation */ | |
973 | ||
974 | sbp2_send_management_orb(lu, device->node_id, generation, | |
975 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
976 | /* | |
977 | * If a bus reset happened, sbp2_update will have requeued | |
978 | * lu->work already. Reset the work from reconnect to login. | |
979 | */ | |
980 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); | |
285838eb | 981 | out: |
48f18c76 | 982 | sbp2_target_put(tgt); |
7f37c426 | 983 | } |
9ba136d0 | 984 | |
5a3c2be6 | 985 | static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) |
9ba136d0 | 986 | { |
5a3c2be6 | 987 | struct sbp2_logical_unit *lu; |
9ba136d0 | 988 | |
5a3c2be6 SR |
989 | lu = kmalloc(sizeof(*lu), GFP_KERNEL); |
990 | if (!lu) | |
991 | return -ENOMEM; | |
9ba136d0 | 992 | |
5a3c2be6 SR |
993 | lu->address_handler.length = 0x100; |
994 | lu->address_handler.address_callback = sbp2_status_write; | |
995 | lu->address_handler.callback_data = lu; | |
9ba136d0 | 996 | |
5a3c2be6 SR |
997 | if (fw_core_add_address_handler(&lu->address_handler, |
998 | &fw_high_memory_region) < 0) { | |
999 | kfree(lu); | |
1000 | return -ENOMEM; | |
1001 | } | |
9ba136d0 | 1002 | |
f8436158 SR |
1003 | lu->tgt = tgt; |
1004 | lu->lun = lun_entry & 0xffff; | |
cd1f70fd | 1005 | lu->login_id = INVALID_LOGIN_ID; |
f8436158 SR |
1006 | lu->retries = 0; |
1007 | lu->has_sdev = false; | |
1008 | lu->blocked = false; | |
2e2705bd | 1009 | ++tgt->dont_block; |
5a3c2be6 SR |
1010 | INIT_LIST_HEAD(&lu->orb_list); |
1011 | INIT_DELAYED_WORK(&lu->work, sbp2_login); | |
9ba136d0 | 1012 | |
5a3c2be6 SR |
1013 | list_add_tail(&lu->link, &tgt->lu_list); |
1014 | return 0; | |
1015 | } | |
ad85274f | 1016 | |
5a3c2be6 SR |
1017 | static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory) |
1018 | { | |
1019 | struct fw_csr_iterator ci; | |
1020 | int key, value; | |
9ba136d0 | 1021 | |
5a3c2be6 SR |
1022 | fw_csr_iterator_init(&ci, directory); |
1023 | while (fw_csr_iterator_next(&ci, &key, &value)) | |
1024 | if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && | |
1025 | sbp2_add_logical_unit(tgt, value) < 0) | |
1026 | return -ENOMEM; | |
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory, | |
1031 | u32 *model, u32 *firmware_revision) | |
1032 | { | |
1033 | struct fw_csr_iterator ci; | |
1034 | int key, value; | |
1035 | ||
1036 | fw_csr_iterator_init(&ci, directory); | |
9ba136d0 KH |
1037 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
1038 | switch (key) { | |
5a3c2be6 | 1039 | |
9ba136d0 | 1040 | case CSR_DEPENDENT_INFO | CSR_OFFSET: |
5a3c2be6 SR |
1041 | tgt->management_agent_address = |
1042 | CSR_REGISTER_BASE + 4 * value; | |
9ba136d0 | 1043 | break; |
5a3c2be6 SR |
1044 | |
1045 | case CSR_DIRECTORY_ID: | |
1046 | tgt->directory_id = value; | |
9ba136d0 | 1047 | break; |
5a3c2be6 | 1048 | |
9ba136d0 | 1049 | case CSR_MODEL: |
5a3c2be6 SR |
1050 | *model = value; |
1051 | break; | |
1052 | ||
1053 | case SBP2_CSR_FIRMWARE_REVISION: | |
1054 | *firmware_revision = value; | |
1055 | break; | |
1056 | ||
384170da JW |
1057 | case SBP2_CSR_UNIT_CHARACTERISTICS: |
1058 | /* the timeout value is stored in 500ms units */ | |
eaf76e0d | 1059 | tgt->mgt_orb_timeout = (value >> 8 & 0xff) * 500; |
384170da JW |
1060 | break; |
1061 | ||
5a3c2be6 SR |
1062 | case SBP2_CSR_LOGICAL_UNIT_NUMBER: |
1063 | if (sbp2_add_logical_unit(tgt, value) < 0) | |
1064 | return -ENOMEM; | |
1065 | break; | |
1066 | ||
1067 | case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: | |
0e3e2eab RS |
1068 | /* Adjust for the increment in the iterator */ |
1069 | if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0) | |
5a3c2be6 | 1070 | return -ENOMEM; |
9ba136d0 KH |
1071 | break; |
1072 | } | |
1073 | } | |
5a3c2be6 SR |
1074 | return 0; |
1075 | } | |
1076 | ||
eaf76e0d SR |
1077 | /* |
1078 | * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be | |
1079 | * provided in the config rom. Most devices do provide a value, which | |
1080 | * we'll use for login management orbs, but with some sane limits. | |
1081 | */ | |
1082 | static void sbp2_clamp_management_orb_timeout(struct sbp2_target *tgt) | |
1083 | { | |
1084 | unsigned int timeout = tgt->mgt_orb_timeout; | |
1085 | ||
1086 | if (timeout > 40000) | |
1087 | fw_notify("%s: %ds mgt_ORB_timeout limited to 40s\n", | |
1088 | tgt->bus_id, timeout / 1000); | |
1089 | ||
1090 | tgt->mgt_orb_timeout = clamp_val(timeout, 5000, 40000); | |
1091 | } | |
1092 | ||
5a3c2be6 SR |
1093 | static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, |
1094 | u32 firmware_revision) | |
1095 | { | |
1096 | int i; | |
05cca738 | 1097 | unsigned int w = sbp2_param_workarounds; |
2df222b8 SR |
1098 | |
1099 | if (w) | |
1100 | fw_notify("Please notify linux1394-devel@lists.sourceforge.net " | |
1101 | "if you need the workarounds parameter for %s\n", | |
48f18c76 | 1102 | tgt->bus_id); |
5a3c2be6 | 1103 | |
2df222b8 SR |
1104 | if (w & SBP2_WORKAROUND_OVERRIDE) |
1105 | goto out; | |
9ba136d0 KH |
1106 | |
1107 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
5a3c2be6 | 1108 | |
9ba136d0 KH |
1109 | if (sbp2_workarounds_table[i].firmware_revision != |
1110 | (firmware_revision & 0xffffff00)) | |
1111 | continue; | |
5a3c2be6 | 1112 | |
9ba136d0 | 1113 | if (sbp2_workarounds_table[i].model != model && |
f746072a | 1114 | sbp2_workarounds_table[i].model != SBP2_ROM_VALUE_WILDCARD) |
9ba136d0 | 1115 | continue; |
5a3c2be6 | 1116 | |
2df222b8 | 1117 | w |= sbp2_workarounds_table[i].workarounds; |
9ba136d0 KH |
1118 | break; |
1119 | } | |
2df222b8 SR |
1120 | out: |
1121 | if (w) | |
5a3c2be6 | 1122 | fw_notify("Workarounds for %s: 0x%x " |
9ba136d0 | 1123 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", |
48f18c76 | 1124 | tgt->bus_id, w, firmware_revision, model); |
2df222b8 | 1125 | tgt->workarounds = w; |
5a3c2be6 SR |
1126 | } |
1127 | ||
1128 | static struct scsi_host_template scsi_driver_template; | |
1129 | ||
1130 | static int sbp2_probe(struct device *dev) | |
1131 | { | |
1132 | struct fw_unit *unit = fw_unit(dev); | |
e5110d01 | 1133 | struct fw_device *device = fw_parent_device(unit); |
5a3c2be6 SR |
1134 | struct sbp2_target *tgt; |
1135 | struct sbp2_logical_unit *lu; | |
1136 | struct Scsi_Host *shost; | |
1137 | u32 model, firmware_revision; | |
1138 | ||
09b12dd4 SR |
1139 | if (dma_get_max_seg_size(device->card->device) > SBP2_MAX_SEG_SIZE) |
1140 | BUG_ON(dma_set_max_seg_size(device->card->device, | |
1141 | SBP2_MAX_SEG_SIZE)); | |
1142 | ||
5a3c2be6 SR |
1143 | shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); |
1144 | if (shost == NULL) | |
1145 | return -ENOMEM; | |
1146 | ||
1147 | tgt = (struct sbp2_target *)shost->hostdata; | |
d961450d | 1148 | dev_set_drvdata(&unit->device, tgt); |
5a3c2be6 SR |
1149 | tgt->unit = unit; |
1150 | kref_init(&tgt->kref); | |
1151 | INIT_LIST_HEAD(&tgt->lu_list); | |
a1f64819 | 1152 | tgt->bus_id = dev_name(&unit->device); |
c9755e14 | 1153 | tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; |
5a3c2be6 SR |
1154 | |
1155 | if (fw_device_enable_phys_dma(device) < 0) | |
1156 | goto fail_shost_put; | |
1157 | ||
af271941 SR |
1158 | shost->max_cmd_len = SBP2_MAX_CDB_SIZE; |
1159 | ||
5a3c2be6 SR |
1160 | if (scsi_add_host(shost, &unit->device) < 0) |
1161 | goto fail_shost_put; | |
1162 | ||
855c603d | 1163 | fw_device_get(device); |
1dc3bea7 | 1164 | fw_unit_get(unit); |
855c603d | 1165 | |
5a3c2be6 SR |
1166 | /* implicit directory ID */ |
1167 | tgt->directory_id = ((unit->directory - device->config_rom) * 4 | |
1168 | + CSR_CONFIG_ROM) & 0xffffff; | |
1169 | ||
f746072a SR |
1170 | firmware_revision = SBP2_ROM_VALUE_MISSING; |
1171 | model = SBP2_ROM_VALUE_MISSING; | |
1172 | ||
5a3c2be6 SR |
1173 | if (sbp2_scan_unit_dir(tgt, unit->directory, &model, |
1174 | &firmware_revision) < 0) | |
1175 | goto fail_tgt_put; | |
1176 | ||
eaf76e0d | 1177 | sbp2_clamp_management_orb_timeout(tgt); |
5a3c2be6 | 1178 | sbp2_init_workarounds(tgt, model, firmware_revision); |
9ba136d0 | 1179 | |
a08e100a SR |
1180 | /* |
1181 | * At S100 we can do 512 bytes per packet, at S200 1024 bytes, | |
1182 | * and so on up to 4096 bytes. The SBP-2 max_payload field | |
1183 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
1184 | * if we set this to max_speed + 7, we get the right value. | |
1185 | */ | |
1186 | tgt->max_payload = min(device->max_speed + 7, 10U); | |
1187 | tgt->max_payload = min(tgt->max_payload, device->card->max_receive - 1); | |
1188 | ||
285838eb | 1189 | /* Do the login in a workqueue so we can easily reschedule retries. */ |
5a3c2be6 | 1190 | list_for_each_entry(lu, &tgt->lu_list, link) |
0dcfeb7e | 1191 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
9ba136d0 | 1192 | return 0; |
ad85274f | 1193 | |
5a3c2be6 | 1194 | fail_tgt_put: |
285838eb | 1195 | sbp2_target_put(tgt); |
5a3c2be6 SR |
1196 | return -ENOMEM; |
1197 | ||
1198 | fail_shost_put: | |
1199 | scsi_host_put(shost); | |
1200 | return -ENOMEM; | |
9ba136d0 KH |
1201 | } |
1202 | ||
1203 | static int sbp2_remove(struct device *dev) | |
1204 | { | |
1205 | struct fw_unit *unit = fw_unit(dev); | |
d961450d | 1206 | struct sbp2_target *tgt = dev_get_drvdata(&unit->device); |
9ba136d0 | 1207 | |
285838eb | 1208 | sbp2_target_put(tgt); |
9ba136d0 KH |
1209 | return 0; |
1210 | } | |
1211 | ||
1212 | static void sbp2_reconnect(struct work_struct *work) | |
1213 | { | |
5a3c2be6 SR |
1214 | struct sbp2_logical_unit *lu = |
1215 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 | 1216 | struct sbp2_target *tgt = lu->tgt; |
e5110d01 | 1217 | struct fw_device *device = target_device(tgt); |
9ba136d0 KH |
1218 | int generation, node_id, local_node_id; |
1219 | ||
be6f48b0 SR |
1220 | if (fw_device_is_shutdown(device)) |
1221 | goto out; | |
1222 | ||
5a8a1bcd | 1223 | generation = device->generation; |
621f6dd7 | 1224 | smp_rmb(); /* node IDs must not be older than generation */ |
5a8a1bcd SR |
1225 | node_id = device->node_id; |
1226 | local_node_id = device->card->node_id; | |
9ba136d0 | 1227 | |
5a3c2be6 | 1228 | if (sbp2_send_management_orb(lu, node_id, generation, |
7f37c426 | 1229 | SBP2_RECONNECT_REQUEST, |
5a3c2be6 | 1230 | lu->login_id, NULL) < 0) { |
ce896d95 SR |
1231 | /* |
1232 | * If reconnect was impossible even though we are in the | |
1233 | * current generation, fall back and try to log in again. | |
1234 | * | |
1235 | * We could check for "Function rejected" status, but | |
1236 | * looking at the bus generation as simpler and more general. | |
1237 | */ | |
1238 | smp_rmb(); /* get current card generation */ | |
1239 | if (generation == device->card->generation || | |
1240 | lu->retries++ >= 5) { | |
48f18c76 | 1241 | fw_error("%s: failed to reconnect\n", tgt->bus_id); |
5a3c2be6 SR |
1242 | lu->retries = 0; |
1243 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); | |
7f37c426 | 1244 | } |
285838eb SR |
1245 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
1246 | goto out; | |
7f37c426 | 1247 | } |
9ba136d0 | 1248 | |
48f18c76 SR |
1249 | tgt->node_id = node_id; |
1250 | tgt->address_high = local_node_id << 16; | |
621f6dd7 SR |
1251 | smp_wmb(); /* node IDs must not be older than generation */ |
1252 | lu->generation = generation; | |
7f37c426 | 1253 | |
48f18c76 SR |
1254 | fw_notify("%s: reconnected to LUN %04x (%d retries)\n", |
1255 | tgt->bus_id, lu->lun, lu->retries); | |
5a3c2be6 SR |
1256 | |
1257 | sbp2_agent_reset(lu); | |
1258 | sbp2_cancel_orbs(lu); | |
2e2705bd | 1259 | sbp2_conditionally_unblock(lu); |
285838eb | 1260 | out: |
48f18c76 | 1261 | sbp2_target_put(tgt); |
9ba136d0 KH |
1262 | } |
1263 | ||
1264 | static void sbp2_update(struct fw_unit *unit) | |
1265 | { | |
d961450d | 1266 | struct sbp2_target *tgt = dev_get_drvdata(&unit->device); |
5a3c2be6 | 1267 | struct sbp2_logical_unit *lu; |
9ba136d0 | 1268 | |
e5110d01 | 1269 | fw_device_enable_phys_dma(fw_parent_device(unit)); |
5a3c2be6 SR |
1270 | |
1271 | /* | |
1272 | * Fw-core serializes sbp2_update() against sbp2_remove(). | |
1273 | * Iteration over tgt->lu_list is therefore safe here. | |
1274 | */ | |
1275 | list_for_each_entry(lu, &tgt->lu_list, link) { | |
2e2705bd | 1276 | sbp2_conditionally_block(lu); |
5a3c2be6 | 1277 | lu->retries = 0; |
285838eb | 1278 | sbp2_queue_work(lu, 0); |
5a3c2be6 | 1279 | } |
9ba136d0 KH |
1280 | } |
1281 | ||
1282 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
1283 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
1284 | ||
b3b29888 | 1285 | static const struct ieee1394_device_id sbp2_id_table[] = { |
9ba136d0 | 1286 | { |
b3b29888 SR |
1287 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | |
1288 | IEEE1394_MATCH_VERSION, | |
9ba136d0 | 1289 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, |
5af4e5ea | 1290 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
1291 | }, |
1292 | { } | |
1293 | }; | |
1294 | ||
1295 | static struct fw_driver sbp2_driver = { | |
1296 | .driver = { | |
1297 | .owner = THIS_MODULE, | |
1298 | .name = sbp2_driver_name, | |
1299 | .bus = &fw_bus_type, | |
1300 | .probe = sbp2_probe, | |
1301 | .remove = sbp2_remove, | |
1302 | }, | |
1303 | .update = sbp2_update, | |
1304 | .id_table = sbp2_id_table, | |
1305 | }; | |
1306 | ||
5e212567 SR |
1307 | static void sbp2_unmap_scatterlist(struct device *card_device, |
1308 | struct sbp2_command_orb *orb) | |
1309 | { | |
1310 | if (scsi_sg_count(orb->cmd)) | |
1311 | dma_unmap_sg(card_device, scsi_sglist(orb->cmd), | |
1312 | scsi_sg_count(orb->cmd), | |
1313 | orb->cmd->sc_data_direction); | |
1314 | ||
1315 | if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT)) | |
1316 | dma_unmap_single(card_device, orb->page_table_bus, | |
1317 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
1318 | } | |
1319 | ||
53dca511 | 1320 | static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) |
9ba136d0 | 1321 | { |
fbb5423c KH |
1322 | int sam_status; |
1323 | ||
9ba136d0 KH |
1324 | sense_data[0] = 0x70; |
1325 | sense_data[1] = 0x0; | |
1326 | sense_data[2] = sbp2_status[1]; | |
1327 | sense_data[3] = sbp2_status[4]; | |
1328 | sense_data[4] = sbp2_status[5]; | |
1329 | sense_data[5] = sbp2_status[6]; | |
1330 | sense_data[6] = sbp2_status[7]; | |
1331 | sense_data[7] = 10; | |
1332 | sense_data[8] = sbp2_status[8]; | |
1333 | sense_data[9] = sbp2_status[9]; | |
1334 | sense_data[10] = sbp2_status[10]; | |
1335 | sense_data[11] = sbp2_status[11]; | |
1336 | sense_data[12] = sbp2_status[2]; | |
1337 | sense_data[13] = sbp2_status[3]; | |
1338 | sense_data[14] = sbp2_status[12]; | |
1339 | sense_data[15] = sbp2_status[13]; | |
1340 | ||
fbb5423c | 1341 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 1342 | |
fbb5423c KH |
1343 | switch (sam_status) { |
1344 | case SAM_STAT_GOOD: | |
9ba136d0 | 1345 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 1346 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 1347 | case SAM_STAT_BUSY: |
9ba136d0 KH |
1348 | case SAM_STAT_RESERVATION_CONFLICT: |
1349 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
1350 | return DID_OK << 16 | sam_status; |
1351 | ||
9ba136d0 | 1352 | default: |
fbb5423c | 1353 | return DID_ERROR << 16; |
9ba136d0 KH |
1354 | } |
1355 | } | |
1356 | ||
53dca511 SR |
1357 | static void complete_command_orb(struct sbp2_orb *base_orb, |
1358 | struct sbp2_status *status) | |
9ba136d0 | 1359 | { |
6f061487 JF |
1360 | struct sbp2_command_orb *orb = |
1361 | container_of(base_orb, struct sbp2_command_orb, base); | |
e5110d01 | 1362 | struct fw_device *device = target_device(orb->lu->tgt); |
9ba136d0 KH |
1363 | int result; |
1364 | ||
1365 | if (status != NULL) { | |
a77754a7 | 1366 | if (STATUS_GET_DEAD(*status)) |
e0e60215 | 1367 | sbp2_agent_reset_no_wait(orb->lu); |
9ba136d0 | 1368 | |
a77754a7 | 1369 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 1370 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 1371 | result = DID_OK << 16; |
9ba136d0 KH |
1372 | break; |
1373 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 1374 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
1375 | break; |
1376 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
1377 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
1378 | default: | |
fbb5423c | 1379 | result = DID_ERROR << 16; |
9ba136d0 KH |
1380 | break; |
1381 | } | |
1382 | ||
a77754a7 KH |
1383 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
1384 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
1385 | orb->cmd->sense_buffer); |
1386 | } else { | |
c781c06d KH |
1387 | /* |
1388 | * If the orb completes with status == NULL, something | |
9ba136d0 | 1389 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
1390 | * or when sending the write (less likely). |
1391 | */ | |
fbb5423c | 1392 | result = DID_BUS_BUSY << 16; |
2e2705bd | 1393 | sbp2_conditionally_block(orb->lu); |
9ba136d0 KH |
1394 | } |
1395 | ||
1396 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 1397 | sizeof(orb->request), DMA_TO_DEVICE); |
5e212567 | 1398 | sbp2_unmap_scatterlist(device->card->device, orb); |
9ba136d0 | 1399 | |
fbb5423c | 1400 | orb->cmd->result = result; |
9ba136d0 | 1401 | orb->done(orb->cmd); |
9ba136d0 KH |
1402 | } |
1403 | ||
53dca511 SR |
1404 | static int sbp2_map_scatterlist(struct sbp2_command_orb *orb, |
1405 | struct fw_device *device, struct sbp2_logical_unit *lu) | |
9ba136d0 | 1406 | { |
09b12dd4 SR |
1407 | struct scatterlist *sg = scsi_sglist(orb->cmd); |
1408 | int i, n; | |
1409 | ||
1410 | n = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd), | |
1411 | orb->cmd->sc_data_direction); | |
1412 | if (n == 0) | |
95ffc5e3 | 1413 | goto fail; |
9ba136d0 | 1414 | |
c781c06d KH |
1415 | /* |
1416 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
1417 | * the scatter list by converting it to an immediate block |
1418 | * request. This is also a workaround for broken devices such | |
1419 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
1420 | * tables. |
1421 | */ | |
09b12dd4 | 1422 | if (n == 1) { |
71ee9f01 SR |
1423 | orb->request.data_descriptor.high = |
1424 | cpu_to_be32(lu->tgt->address_high); | |
1425 | orb->request.data_descriptor.low = | |
1426 | cpu_to_be32(sg_dma_address(sg)); | |
1427 | orb->request.misc |= | |
1428 | cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg))); | |
95ffc5e3 | 1429 | return 0; |
9ba136d0 KH |
1430 | } |
1431 | ||
09b12dd4 SR |
1432 | for_each_sg(sg, sg, n, i) { |
1433 | orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16); | |
1434 | orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg)); | |
9ba136d0 KH |
1435 | } |
1436 | ||
b4be016a SR |
1437 | orb->page_table_bus = |
1438 | dma_map_single(device->card->device, orb->page_table, | |
1439 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
8d8bb39b | 1440 | if (dma_mapping_error(device->card->device, orb->page_table_bus)) |
b4be016a | 1441 | goto fail_page_table; |
9ba136d0 | 1442 | |
c781c06d KH |
1443 | /* |
1444 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
1445 | * to fill in the node ID part of the address. All other |
1446 | * pointers assume that the data referenced reside on the | |
1447 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
1448 | * on other nodes so we need to put our ID in descriptor.high. |
1449 | */ | |
71ee9f01 SR |
1450 | orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high); |
1451 | orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus); | |
1452 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT | | |
09b12dd4 | 1453 | COMMAND_ORB_DATA_SIZE(n)); |
9ba136d0 | 1454 | |
95ffc5e3 KH |
1455 | return 0; |
1456 | ||
1457 | fail_page_table: | |
09b12dd4 SR |
1458 | dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd), |
1459 | scsi_sg_count(orb->cmd), orb->cmd->sc_data_direction); | |
95ffc5e3 KH |
1460 | fail: |
1461 | return -ENOMEM; | |
9ba136d0 KH |
1462 | } |
1463 | ||
9ba136d0 KH |
1464 | /* SCSI stack integration */ |
1465 | ||
1466 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |
1467 | { | |
5a3c2be6 | 1468 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
e5110d01 | 1469 | struct fw_device *device = target_device(lu->tgt); |
9ba136d0 | 1470 | struct sbp2_command_orb *orb; |
4bbc1bdd | 1471 | int generation, retval = SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1472 | |
c781c06d KH |
1473 | /* |
1474 | * Bidirectional commands are not yet implemented, and unknown | |
1475 | * transfer direction not handled. | |
1476 | */ | |
9ba136d0 | 1477 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
8a8cea27 | 1478 | fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n"); |
e1b68c4d KH |
1479 | cmd->result = DID_ERROR << 16; |
1480 | done(cmd); | |
1481 | return 0; | |
9ba136d0 KH |
1482 | } |
1483 | ||
2d826cc5 | 1484 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
1485 | if (orb == NULL) { |
1486 | fw_notify("failed to alloc orb\n"); | |
5a3c2be6 | 1487 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 KH |
1488 | } |
1489 | ||
12f26aa1 KH |
1490 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
1491 | orb->base.rcode = -1; | |
e57d2011 | 1492 | kref_init(&orb->base.kref); |
9ba136d0 | 1493 | |
5a3c2be6 | 1494 | orb->lu = lu; |
9ba136d0 KH |
1495 | orb->done = done; |
1496 | orb->cmd = cmd; | |
1497 | ||
a08e100a | 1498 | orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL); |
71ee9f01 | 1499 | orb->request.misc = cpu_to_be32( |
a08e100a | 1500 | COMMAND_ORB_MAX_PAYLOAD(lu->tgt->max_payload) | |
f1397490 | 1501 | COMMAND_ORB_SPEED(device->max_speed) | |
71ee9f01 | 1502 | COMMAND_ORB_NOTIFY); |
9ba136d0 KH |
1503 | |
1504 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
0d7dcbf2 | 1505 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION); |
9ba136d0 | 1506 | |
4bbc1bdd SR |
1507 | generation = device->generation; |
1508 | smp_rmb(); /* sbp2_map_scatterlist looks at tgt->address_high */ | |
1509 | ||
5a3c2be6 SR |
1510 | if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) |
1511 | goto out; | |
9ba136d0 | 1512 | |
64a87b24 | 1513 | memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len); |
9ba136d0 KH |
1514 | |
1515 | orb->base.callback = complete_command_orb; | |
8526392a SR |
1516 | orb->base.request_bus = |
1517 | dma_map_single(device->card->device, &orb->request, | |
1518 | sizeof(orb->request), DMA_TO_DEVICE); | |
5e212567 SR |
1519 | if (dma_mapping_error(device->card->device, orb->base.request_bus)) { |
1520 | sbp2_unmap_scatterlist(device->card->device, orb); | |
5a3c2be6 | 1521 | goto out; |
5e212567 | 1522 | } |
82eff9db | 1523 | |
4bbc1bdd | 1524 | sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation, |
5a3c2be6 SR |
1525 | lu->command_block_agent_address + SBP2_ORB_POINTER); |
1526 | retval = 0; | |
1527 | out: | |
e57d2011 | 1528 | kref_put(&orb->base.kref, free_orb); |
5a3c2be6 | 1529 | return retval; |
9ba136d0 KH |
1530 | } |
1531 | ||
cfb01381 SR |
1532 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1533 | { | |
5a3c2be6 | 1534 | struct sbp2_logical_unit *lu = sdev->hostdata; |
cfb01381 | 1535 | |
5513c5f6 SR |
1536 | /* (Re-)Adding logical units via the SCSI stack is not supported. */ |
1537 | if (!lu) | |
1538 | return -ENOSYS; | |
1539 | ||
cfb01381 SR |
1540 | sdev->allow_restart = 1; |
1541 | ||
8ac3a47c SR |
1542 | /* SBP-2 requires quadlet alignment of the data buffers. */ |
1543 | blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1); | |
465ff318 | 1544 | |
5a3c2be6 | 1545 | if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
cfb01381 | 1546 | sdev->inquiry_len = 36; |
5a3c2be6 | 1547 | |
cfb01381 SR |
1548 | return 0; |
1549 | } | |
1550 | ||
9ba136d0 KH |
1551 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1552 | { | |
5a3c2be6 | 1553 | struct sbp2_logical_unit *lu = sdev->hostdata; |
9ba136d0 | 1554 | |
cfb01381 SR |
1555 | sdev->use_10_for_rw = 1; |
1556 | ||
2635f96f SR |
1557 | if (sbp2_param_exclusive_login) |
1558 | sdev->manage_start_stop = 1; | |
1559 | ||
cfb01381 SR |
1560 | if (sdev->type == TYPE_ROM) |
1561 | sdev->use_10_for_ms = 1; | |
5a3c2be6 | 1562 | |
9ba136d0 | 1563 | if (sdev->type == TYPE_DISK && |
5a3c2be6 | 1564 | lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
9ba136d0 | 1565 | sdev->skip_ms_page_8 = 1; |
5a3c2be6 SR |
1566 | |
1567 | if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) | |
9ba136d0 | 1568 | sdev->fix_capacity = 1; |
5a3c2be6 | 1569 | |
ffcaade3 SR |
1570 | if (lu->tgt->workarounds & SBP2_WORKAROUND_POWER_CONDITION) |
1571 | sdev->start_stop_pwr_cond = 1; | |
1572 | ||
5a3c2be6 | 1573 | if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
cf47c7a2 | 1574 | blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); |
5a3c2be6 | 1575 | |
09b12dd4 SR |
1576 | blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE); |
1577 | ||
9ba136d0 KH |
1578 | return 0; |
1579 | } | |
1580 | ||
1581 | /* | |
1582 | * Called by scsi stack when something has really gone wrong. Usually | |
1583 | * called when a command has timed-out for some reason. | |
1584 | */ | |
1585 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1586 | { | |
5a3c2be6 | 1587 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
9ba136d0 | 1588 | |
48f18c76 | 1589 | fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id); |
5a3c2be6 SR |
1590 | sbp2_agent_reset(lu); |
1591 | sbp2_cancel_orbs(lu); | |
9ba136d0 KH |
1592 | |
1593 | return SUCCESS; | |
1594 | } | |
1595 | ||
14e21986 SR |
1596 | /* |
1597 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: | |
1598 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) | |
1599 | * | |
1600 | * This is the concatenation of target port identifier and logical unit | |
1601 | * identifier as per SAM-2...SAM-4 annex A. | |
1602 | */ | |
53dca511 SR |
1603 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
1604 | struct device_attribute *attr, char *buf) | |
14e21986 SR |
1605 | { |
1606 | struct scsi_device *sdev = to_scsi_device(dev); | |
5a3c2be6 | 1607 | struct sbp2_logical_unit *lu; |
14e21986 SR |
1608 | |
1609 | if (!sdev) | |
1610 | return 0; | |
14e21986 | 1611 | |
5a3c2be6 | 1612 | lu = sdev->hostdata; |
14e21986 | 1613 | |
c9755e14 SR |
1614 | return sprintf(buf, "%016llx:%06x:%04x\n", |
1615 | (unsigned long long)lu->tgt->guid, | |
5a3c2be6 | 1616 | lu->tgt->directory_id, lu->lun); |
14e21986 SR |
1617 | } |
1618 | ||
1619 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
1620 | ||
1621 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { | |
1622 | &dev_attr_ieee1394_id, | |
1623 | NULL | |
1624 | }; | |
1625 | ||
9ba136d0 KH |
1626 | static struct scsi_host_template scsi_driver_template = { |
1627 | .module = THIS_MODULE, | |
1628 | .name = "SBP-2 IEEE-1394", | |
b02b6bc4 | 1629 | .proc_name = sbp2_driver_name, |
9ba136d0 | 1630 | .queuecommand = sbp2_scsi_queuecommand, |
cfb01381 | 1631 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1632 | .slave_configure = sbp2_scsi_slave_configure, |
1633 | .eh_abort_handler = sbp2_scsi_abort, | |
1634 | .this_id = -1, | |
1635 | .sg_tablesize = SG_ALL, | |
1636 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1637 | .cmd_per_lun = 1, |
1638 | .can_queue = 1, | |
14e21986 | 1639 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
9ba136d0 KH |
1640 | }; |
1641 | ||
9ba136d0 KH |
1642 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1643 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1644 | MODULE_LICENSE("GPL"); | |
1645 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1646 | ||
1e4c7b0d OH |
1647 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1648 | #ifndef CONFIG_IEEE1394_SBP2_MODULE | |
1649 | MODULE_ALIAS("sbp2"); | |
1650 | #endif | |
1651 | ||
9ba136d0 KH |
1652 | static int __init sbp2_init(void) |
1653 | { | |
df8ec249 SR |
1654 | sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME); |
1655 | if (!sbp2_wq) | |
1656 | return -ENOMEM; | |
1657 | ||
9ba136d0 KH |
1658 | return driver_register(&sbp2_driver.driver); |
1659 | } | |
1660 | ||
1661 | static void __exit sbp2_cleanup(void) | |
1662 | { | |
1663 | driver_unregister(&sbp2_driver.driver); | |
df8ec249 | 1664 | destroy_workqueue(sbp2_wq); |
9ba136d0 KH |
1665 | } |
1666 | ||
1667 | module_init(sbp2_init); | |
1668 | module_exit(sbp2_cleanup); |