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> |
7bb6bf7c SR |
33 | #include <linux/delay.h> |
34 | #include <linux/device.h> | |
35 | #include <linux/dma-mapping.h> | |
9ba136d0 | 36 | #include <linux/kernel.h> |
7bb6bf7c | 37 | #include <linux/mod_devicetable.h> |
9ba136d0 | 38 | #include <linux/module.h> |
5cd54c94 | 39 | #include <linux/moduleparam.h> |
0b5b2903 | 40 | #include <linux/scatterlist.h> |
e7cdf237 | 41 | #include <linux/string.h> |
2df222b8 | 42 | #include <linux/stringify.h> |
1d3d52c5 | 43 | #include <linux/timer.h> |
df8ec249 | 44 | #include <linux/workqueue.h> |
b5d2a5e0 | 45 | #include <asm/system.h> |
9ba136d0 KH |
46 | |
47 | #include <scsi/scsi.h> | |
48 | #include <scsi/scsi_cmnd.h> | |
9ba136d0 KH |
49 | #include <scsi/scsi_device.h> |
50 | #include <scsi/scsi_host.h> | |
51 | ||
9ba136d0 | 52 | #include "fw-device.h" |
7bb6bf7c SR |
53 | #include "fw-topology.h" |
54 | #include "fw-transaction.h" | |
9ba136d0 | 55 | |
5cd54c94 SR |
56 | /* |
57 | * So far only bridges from Oxford Semiconductor are known to support | |
58 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
59 | * are possible on OXFW911 and newer Oxsemi bridges. | |
60 | * | |
61 | * Concurrent logins are useful together with cluster filesystems. | |
62 | */ | |
63 | static int sbp2_param_exclusive_login = 1; | |
64 | module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); | |
65 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " | |
66 | "(default = Y, use N for concurrent initiators)"); | |
67 | ||
2df222b8 SR |
68 | /* |
69 | * Flags for firmware oddities | |
70 | * | |
71 | * - 128kB max transfer | |
72 | * Limit transfer size. Necessary for some old bridges. | |
73 | * | |
74 | * - 36 byte inquiry | |
75 | * When scsi_mod probes the device, let the inquiry command look like that | |
76 | * from MS Windows. | |
77 | * | |
78 | * - skip mode page 8 | |
79 | * Suppress sending of mode_sense for mode page 8 if the device pretends to | |
80 | * support the SCSI Primary Block commands instead of Reduced Block Commands. | |
81 | * | |
82 | * - fix capacity | |
83 | * Tell sd_mod to correct the last sector number reported by read_capacity. | |
84 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. | |
85 | * Don't use this with devices which don't have this bug. | |
86 | * | |
9220f194 SR |
87 | * - delay inquiry |
88 | * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry. | |
89 | * | |
ffcaade3 SR |
90 | * - power condition |
91 | * Set the power condition field in the START STOP UNIT commands sent by | |
92 | * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on). | |
93 | * Some disks need this to spin down or to resume properly. | |
94 | * | |
2df222b8 SR |
95 | * - override internal blacklist |
96 | * Instead of adding to the built-in blacklist, use only the workarounds | |
97 | * specified in the module load parameter. | |
98 | * Useful if a blacklist entry interfered with a non-broken device. | |
99 | */ | |
100 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 | |
101 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 | |
102 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 | |
103 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 | |
9220f194 SR |
104 | #define SBP2_WORKAROUND_DELAY_INQUIRY 0x10 |
105 | #define SBP2_INQUIRY_DELAY 12 | |
ffcaade3 | 106 | #define SBP2_WORKAROUND_POWER_CONDITION 0x20 |
2df222b8 SR |
107 | #define SBP2_WORKAROUND_OVERRIDE 0x100 |
108 | ||
109 | static int sbp2_param_workarounds; | |
110 | module_param_named(workarounds, sbp2_param_workarounds, int, 0644); | |
111 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
112 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
113 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
114 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
115 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) | |
9220f194 | 116 | ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY) |
ffcaade3 SR |
117 | ", set power condition in start stop unit = " |
118 | __stringify(SBP2_WORKAROUND_POWER_CONDITION) | |
2df222b8 SR |
119 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
120 | ", or a combination)"); | |
121 | ||
9ba136d0 | 122 | /* I don't know why the SCSI stack doesn't define something like this... */ |
a98e2719 | 123 | typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); |
9ba136d0 KH |
124 | |
125 | static const char sbp2_driver_name[] = "sbp2"; | |
126 | ||
5a3c2be6 SR |
127 | /* |
128 | * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry | |
129 | * and one struct scsi_device per sbp2_logical_unit. | |
130 | */ | |
131 | struct sbp2_logical_unit { | |
132 | struct sbp2_target *tgt; | |
133 | struct list_head link; | |
9ba136d0 KH |
134 | struct fw_address_handler address_handler; |
135 | struct list_head orb_list; | |
5a3c2be6 | 136 | |
9ba136d0 | 137 | u64 command_block_agent_address; |
5a3c2be6 | 138 | u16 lun; |
9ba136d0 KH |
139 | int login_id; |
140 | ||
c781c06d | 141 | /* |
5a3c2be6 SR |
142 | * The generation is updated once we've logged in or reconnected |
143 | * to the logical unit. Thus, I/O to the device will automatically | |
144 | * fail and get retried if it happens in a window where the device | |
145 | * is not ready, e.g. after a bus reset but before we reconnect. | |
c781c06d | 146 | */ |
9ba136d0 | 147 | int generation; |
7f37c426 KH |
148 | int retries; |
149 | struct delayed_work work; | |
f8436158 | 150 | bool has_sdev; |
2e2705bd | 151 | bool blocked; |
9ba136d0 KH |
152 | }; |
153 | ||
5a3c2be6 SR |
154 | /* |
155 | * We create one struct sbp2_target per IEEE 1212 Unit Directory | |
156 | * and one struct Scsi_Host per sbp2_target. | |
157 | */ | |
158 | struct sbp2_target { | |
159 | struct kref kref; | |
160 | struct fw_unit *unit; | |
48f18c76 | 161 | const char *bus_id; |
05cca738 | 162 | struct list_head lu_list; |
5a3c2be6 SR |
163 | |
164 | u64 management_agent_address; | |
c9755e14 | 165 | u64 guid; |
5a3c2be6 SR |
166 | int directory_id; |
167 | int node_id; | |
168 | int address_high; | |
05cca738 | 169 | unsigned int workarounds; |
384170da | 170 | unsigned int mgt_orb_timeout; |
2e2705bd SR |
171 | |
172 | int dont_block; /* counter for each logical unit */ | |
173 | int blocked; /* ditto */ | |
5a3c2be6 SR |
174 | }; |
175 | ||
cd1f70fd JF |
176 | /* Impossible login_id, to detect logout attempt before successful login */ |
177 | #define INVALID_LOGIN_ID 0x10000 | |
178 | ||
a4c379c1 JW |
179 | /* |
180 | * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be | |
384170da JW |
181 | * provided in the config rom. Most devices do provide a value, which |
182 | * we'll use for login management orbs, but with some sane limits. | |
a4c379c1 | 183 | */ |
384170da JW |
184 | #define SBP2_MIN_LOGIN_ORB_TIMEOUT 5000U /* Timeout in ms */ |
185 | #define SBP2_MAX_LOGIN_ORB_TIMEOUT 40000U /* Timeout in ms */ | |
05cca738 | 186 | #define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */ |
9ba136d0 | 187 | #define SBP2_ORB_NULL 0x80000000 |
17cff9ff JW |
188 | #define SBP2_RETRY_LIMIT 0xf /* 15 retries */ |
189 | #define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */ | |
9ba136d0 | 190 | |
09b12dd4 SR |
191 | /* |
192 | * The default maximum s/g segment size of a FireWire controller is | |
193 | * usually 0x10000, but SBP-2 only allows 0xffff. Since buffers have to | |
194 | * be quadlet-aligned, we set the length limit to 0xffff & ~3. | |
195 | */ | |
196 | #define SBP2_MAX_SEG_SIZE 0xfffc | |
197 | ||
9ba136d0 | 198 | /* Unit directory keys */ |
384170da | 199 | #define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a |
5a3c2be6 SR |
200 | #define SBP2_CSR_FIRMWARE_REVISION 0x3c |
201 | #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 | |
202 | #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 | |
9ba136d0 | 203 | |
9ba136d0 KH |
204 | /* Management orb opcodes */ |
205 | #define SBP2_LOGIN_REQUEST 0x0 | |
206 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
207 | #define SBP2_RECONNECT_REQUEST 0x3 | |
208 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
209 | #define SBP2_LOGOUT_REQUEST 0x7 | |
210 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
211 | #define SBP2_ABORT_TASK_SET 0xc | |
212 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
213 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
214 | ||
215 | /* Offsets for command block agent registers */ | |
216 | #define SBP2_AGENT_STATE 0x00 | |
217 | #define SBP2_AGENT_RESET 0x04 | |
218 | #define SBP2_ORB_POINTER 0x08 | |
219 | #define SBP2_DOORBELL 0x10 | |
220 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
221 | ||
222 | /* Status write response codes */ | |
223 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
224 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
225 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
226 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
227 | ||
a77754a7 KH |
228 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
229 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) | |
230 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) | |
231 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) | |
232 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) | |
233 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) | |
234 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) | |
235 | #define STATUS_GET_DATA(v) ((v).data) | |
9ba136d0 KH |
236 | |
237 | struct sbp2_status { | |
238 | u32 status; | |
239 | u32 orb_low; | |
240 | u8 data[24]; | |
241 | }; | |
242 | ||
243 | struct sbp2_pointer { | |
71ee9f01 SR |
244 | __be32 high; |
245 | __be32 low; | |
9ba136d0 KH |
246 | }; |
247 | ||
248 | struct sbp2_orb { | |
249 | struct fw_transaction t; | |
e57d2011 | 250 | struct kref kref; |
9ba136d0 KH |
251 | dma_addr_t request_bus; |
252 | int rcode; | |
253 | struct sbp2_pointer pointer; | |
a98e2719 | 254 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
9ba136d0 KH |
255 | struct list_head link; |
256 | }; | |
257 | ||
a77754a7 KH |
258 | #define MANAGEMENT_ORB_LUN(v) ((v)) |
259 | #define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16) | |
260 | #define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20) | |
5cd54c94 | 261 | #define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0) |
a77754a7 KH |
262 | #define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29) |
263 | #define MANAGEMENT_ORB_NOTIFY ((1) << 31) | |
9ba136d0 | 264 | |
a77754a7 KH |
265 | #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) |
266 | #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) | |
9ba136d0 KH |
267 | |
268 | struct sbp2_management_orb { | |
269 | struct sbp2_orb base; | |
270 | struct { | |
271 | struct sbp2_pointer password; | |
272 | struct sbp2_pointer response; | |
71ee9f01 SR |
273 | __be32 misc; |
274 | __be32 length; | |
9ba136d0 KH |
275 | struct sbp2_pointer status_fifo; |
276 | } request; | |
277 | __be32 response[4]; | |
278 | dma_addr_t response_bus; | |
279 | struct completion done; | |
280 | struct sbp2_status status; | |
281 | }; | |
282 | ||
9ba136d0 | 283 | struct sbp2_login_response { |
71ee9f01 | 284 | __be32 misc; |
9ba136d0 | 285 | struct sbp2_pointer command_block_agent; |
71ee9f01 | 286 | __be32 reconnect_hold; |
9ba136d0 | 287 | }; |
a77754a7 KH |
288 | #define COMMAND_ORB_DATA_SIZE(v) ((v)) |
289 | #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) | |
290 | #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) | |
291 | #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) | |
292 | #define COMMAND_ORB_SPEED(v) ((v) << 24) | |
0d7dcbf2 | 293 | #define COMMAND_ORB_DIRECTION ((1) << 27) |
a77754a7 KH |
294 | #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) |
295 | #define COMMAND_ORB_NOTIFY ((1) << 31) | |
9ba136d0 KH |
296 | |
297 | struct sbp2_command_orb { | |
298 | struct sbp2_orb base; | |
299 | struct { | |
300 | struct sbp2_pointer next; | |
301 | struct sbp2_pointer data_descriptor; | |
71ee9f01 | 302 | __be32 misc; |
9ba136d0 KH |
303 | u8 command_block[12]; |
304 | } request; | |
305 | struct scsi_cmnd *cmd; | |
306 | scsi_done_fn_t done; | |
5a3c2be6 | 307 | struct sbp2_logical_unit *lu; |
9ba136d0 | 308 | |
9fb2dd12 | 309 | struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); |
9ba136d0 | 310 | dma_addr_t page_table_bus; |
9ba136d0 KH |
311 | }; |
312 | ||
313 | /* | |
314 | * List of devices with known bugs. | |
315 | * | |
316 | * The firmware_revision field, masked with 0xffff00, is the best | |
317 | * indicator for the type of bridge chip of a device. It yields a few | |
318 | * false positives but this did not break correctly behaving devices | |
319 | * so far. We use ~0 as a wildcard, since the 24 bit values we get | |
320 | * from the config rom can never match that. | |
321 | */ | |
322 | static const struct { | |
323 | u32 firmware_revision; | |
324 | u32 model; | |
05cca738 | 325 | unsigned int workarounds; |
9ba136d0 KH |
326 | } sbp2_workarounds_table[] = { |
327 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
328 | .firmware_revision = 0x002800, | |
329 | .model = 0x001010, | |
330 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
ffcaade3 SR |
331 | SBP2_WORKAROUND_MODE_SENSE_8 | |
332 | SBP2_WORKAROUND_POWER_CONDITION, | |
9ba136d0 | 333 | }, |
9220f194 SR |
334 | /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { |
335 | .firmware_revision = 0x002800, | |
336 | .model = 0x000000, | |
ffcaade3 SR |
337 | .workarounds = SBP2_WORKAROUND_DELAY_INQUIRY | |
338 | SBP2_WORKAROUND_POWER_CONDITION, | |
9220f194 | 339 | }, |
9ba136d0 KH |
340 | /* Initio bridges, actually only needed for some older ones */ { |
341 | .firmware_revision = 0x000200, | |
342 | .model = ~0, | |
343 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
344 | }, | |
ffcaade3 SR |
345 | /* PL-3507 bridge with Prolific firmware */ { |
346 | .firmware_revision = 0x012800, | |
347 | .model = ~0, | |
348 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, | |
349 | }, | |
9ba136d0 KH |
350 | /* Symbios bridge */ { |
351 | .firmware_revision = 0xa0b800, | |
352 | .model = ~0, | |
353 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
354 | }, | |
2aa9ff7f SR |
355 | /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ { |
356 | .firmware_revision = 0x002600, | |
357 | .model = ~0, | |
358 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
359 | }, | |
c781c06d KH |
360 | |
361 | /* | |
362 | * There are iPods (2nd gen, 3rd gen) with model_id == 0, but | |
9ba136d0 KH |
363 | * these iPods do not feature the read_capacity bug according |
364 | * to one report. Read_capacity behaviour as well as model_id | |
c781c06d KH |
365 | * could change due to Apple-supplied firmware updates though. |
366 | */ | |
367 | ||
9ba136d0 KH |
368 | /* iPod 4th generation. */ { |
369 | .firmware_revision = 0x0a2700, | |
370 | .model = 0x000021, | |
371 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
372 | }, | |
031bb27c SR |
373 | /* iPod mini */ { |
374 | .firmware_revision = 0x0a2700, | |
375 | .model = 0x000022, | |
376 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
377 | }, | |
9ba136d0 KH |
378 | /* iPod mini */ { |
379 | .firmware_revision = 0x0a2700, | |
380 | .model = 0x000023, | |
381 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
382 | }, | |
383 | /* iPod Photo */ { | |
384 | .firmware_revision = 0x0a2700, | |
385 | .model = 0x00007e, | |
386 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
387 | } | |
388 | }; | |
389 | ||
e57d2011 KH |
390 | static void |
391 | free_orb(struct kref *kref) | |
392 | { | |
393 | struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); | |
394 | ||
395 | kfree(orb); | |
396 | } | |
397 | ||
9ba136d0 KH |
398 | static void |
399 | sbp2_status_write(struct fw_card *card, struct fw_request *request, | |
400 | int tcode, int destination, int source, | |
401 | int generation, int speed, | |
402 | unsigned long long offset, | |
403 | void *payload, size_t length, void *callback_data) | |
404 | { | |
5a3c2be6 | 405 | struct sbp2_logical_unit *lu = callback_data; |
9ba136d0 KH |
406 | struct sbp2_orb *orb; |
407 | struct sbp2_status status; | |
408 | size_t header_size; | |
409 | unsigned long flags; | |
410 | ||
411 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
2d826cc5 | 412 | length == 0 || length > sizeof(status)) { |
9ba136d0 KH |
413 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
414 | return; | |
415 | } | |
416 | ||
417 | header_size = min(length, 2 * sizeof(u32)); | |
418 | fw_memcpy_from_be32(&status, payload, header_size); | |
419 | if (length > header_size) | |
420 | memcpy(status.data, payload + 8, length - header_size); | |
a77754a7 | 421 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
9ba136d0 KH |
422 | fw_notify("non-orb related status write, not handled\n"); |
423 | fw_send_response(card, request, RCODE_COMPLETE); | |
424 | return; | |
425 | } | |
426 | ||
427 | /* Lookup the orb corresponding to this status write. */ | |
428 | spin_lock_irqsave(&card->lock, flags); | |
5a3c2be6 | 429 | list_for_each_entry(orb, &lu->orb_list, link) { |
a77754a7 | 430 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
e57d2011 KH |
431 | STATUS_GET_ORB_LOW(status) == orb->request_bus) { |
432 | orb->rcode = RCODE_COMPLETE; | |
9ba136d0 KH |
433 | list_del(&orb->link); |
434 | break; | |
435 | } | |
436 | } | |
437 | spin_unlock_irqrestore(&card->lock, flags); | |
438 | ||
5a3c2be6 | 439 | if (&orb->link != &lu->orb_list) |
9ba136d0 KH |
440 | orb->callback(orb, &status); |
441 | else | |
442 | fw_error("status write for unknown orb\n"); | |
443 | ||
e57d2011 KH |
444 | kref_put(&orb->kref, free_orb); |
445 | ||
9ba136d0 KH |
446 | fw_send_response(card, request, RCODE_COMPLETE); |
447 | } | |
448 | ||
449 | static void | |
450 | complete_transaction(struct fw_card *card, int rcode, | |
451 | void *payload, size_t length, void *data) | |
452 | { | |
453 | struct sbp2_orb *orb = data; | |
454 | unsigned long flags; | |
455 | ||
e57d2011 KH |
456 | /* |
457 | * This is a little tricky. We can get the status write for | |
458 | * the orb before we get this callback. The status write | |
459 | * handler above will assume the orb pointer transaction was | |
460 | * successful and set the rcode to RCODE_COMPLETE for the orb. | |
461 | * So this callback only sets the rcode if it hasn't already | |
462 | * been set and only does the cleanup if the transaction | |
463 | * failed and we didn't already get a status write. | |
464 | */ | |
465 | spin_lock_irqsave(&card->lock, flags); | |
466 | ||
467 | if (orb->rcode == -1) | |
468 | orb->rcode = rcode; | |
469 | if (orb->rcode != RCODE_COMPLETE) { | |
9ba136d0 | 470 | list_del(&orb->link); |
1b34e974 | 471 | spin_unlock_irqrestore(&card->lock, flags); |
9ba136d0 | 472 | orb->callback(orb, NULL); |
1b34e974 SR |
473 | } else { |
474 | spin_unlock_irqrestore(&card->lock, flags); | |
9ba136d0 | 475 | } |
e57d2011 | 476 | |
e57d2011 | 477 | kref_put(&orb->kref, free_orb); |
9ba136d0 KH |
478 | } |
479 | ||
480 | static void | |
5a3c2be6 | 481 | sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, |
9ba136d0 KH |
482 | int node_id, int generation, u64 offset) |
483 | { | |
5a3c2be6 | 484 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 KH |
485 | unsigned long flags; |
486 | ||
487 | orb->pointer.high = 0; | |
71ee9f01 | 488 | orb->pointer.low = cpu_to_be32(orb->request_bus); |
9ba136d0 KH |
489 | |
490 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 491 | list_add_tail(&orb->link, &lu->orb_list); |
9ba136d0 KH |
492 | spin_unlock_irqrestore(&device->card->lock, flags); |
493 | ||
e57d2011 KH |
494 | /* Take a ref for the orb list and for the transaction callback. */ |
495 | kref_get(&orb->kref); | |
496 | kref_get(&orb->kref); | |
497 | ||
9ba136d0 | 498 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
f1397490 | 499 | node_id, generation, device->max_speed, offset, |
2d826cc5 | 500 | &orb->pointer, sizeof(orb->pointer), |
9ba136d0 KH |
501 | complete_transaction, orb); |
502 | } | |
503 | ||
5a3c2be6 | 504 | static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |
9ba136d0 | 505 | { |
5a3c2be6 | 506 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 KH |
507 | struct sbp2_orb *orb, *next; |
508 | struct list_head list; | |
509 | unsigned long flags; | |
2aaad97b | 510 | int retval = -ENOENT; |
9ba136d0 KH |
511 | |
512 | INIT_LIST_HEAD(&list); | |
513 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 514 | list_splice_init(&lu->orb_list, &list); |
9ba136d0 KH |
515 | spin_unlock_irqrestore(&device->card->lock, flags); |
516 | ||
517 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 518 | retval = 0; |
730c32f5 KH |
519 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
520 | continue; | |
521 | ||
9ba136d0 KH |
522 | orb->rcode = RCODE_CANCELLED; |
523 | orb->callback(orb, NULL); | |
524 | } | |
9ba136d0 | 525 | |
2aaad97b | 526 | return retval; |
1d3d52c5 KH |
527 | } |
528 | ||
9ba136d0 KH |
529 | static void |
530 | complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
531 | { | |
532 | struct sbp2_management_orb *orb = | |
6f061487 | 533 | container_of(base_orb, struct sbp2_management_orb, base); |
9ba136d0 KH |
534 | |
535 | if (status) | |
2d826cc5 | 536 | memcpy(&orb->status, status, sizeof(*status)); |
9ba136d0 KH |
537 | complete(&orb->done); |
538 | } | |
539 | ||
540 | static int | |
5a3c2be6 SR |
541 | sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id, |
542 | int generation, int function, int lun_or_login_id, | |
543 | void *response) | |
9ba136d0 | 544 | { |
5a3c2be6 | 545 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 | 546 | struct sbp2_management_orb *orb; |
a4c379c1 | 547 | unsigned int timeout; |
9ba136d0 KH |
548 | int retval = -ENOMEM; |
549 | ||
be6f48b0 SR |
550 | if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device)) |
551 | return 0; | |
552 | ||
2d826cc5 | 553 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
554 | if (orb == NULL) |
555 | return -ENOMEM; | |
556 | ||
e57d2011 | 557 | kref_init(&orb->base.kref); |
9ba136d0 KH |
558 | orb->response_bus = |
559 | dma_map_single(device->card->device, &orb->response, | |
2d826cc5 | 560 | sizeof(orb->response), DMA_FROM_DEVICE); |
8d8bb39b | 561 | if (dma_mapping_error(device->card->device, orb->response_bus)) |
7aa48481 | 562 | goto fail_mapping_response; |
9ba136d0 | 563 | |
71ee9f01 SR |
564 | orb->request.response.high = 0; |
565 | orb->request.response.low = cpu_to_be32(orb->response_bus); | |
9ba136d0 | 566 | |
71ee9f01 | 567 | orb->request.misc = cpu_to_be32( |
a77754a7 KH |
568 | MANAGEMENT_ORB_NOTIFY | |
569 | MANAGEMENT_ORB_FUNCTION(function) | | |
71ee9f01 SR |
570 | MANAGEMENT_ORB_LUN(lun_or_login_id)); |
571 | orb->request.length = cpu_to_be32( | |
572 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response))); | |
9ba136d0 | 573 | |
71ee9f01 SR |
574 | orb->request.status_fifo.high = |
575 | cpu_to_be32(lu->address_handler.offset >> 32); | |
576 | orb->request.status_fifo.low = | |
577 | cpu_to_be32(lu->address_handler.offset); | |
9ba136d0 | 578 | |
9ba136d0 | 579 | if (function == SBP2_LOGIN_REQUEST) { |
14dc992a | 580 | /* Ask for 2^2 == 4 seconds reconnect grace period */ |
71ee9f01 | 581 | orb->request.misc |= cpu_to_be32( |
14dc992a | 582 | MANAGEMENT_ORB_RECONNECT(2) | |
71ee9f01 | 583 | MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login)); |
384170da | 584 | timeout = lu->tgt->mgt_orb_timeout; |
a4c379c1 JW |
585 | } else { |
586 | timeout = SBP2_ORB_TIMEOUT; | |
9ba136d0 KH |
587 | } |
588 | ||
9ba136d0 KH |
589 | init_completion(&orb->done); |
590 | orb->base.callback = complete_management_orb; | |
2aaad97b | 591 | |
7aa48481 SR |
592 | orb->base.request_bus = |
593 | dma_map_single(device->card->device, &orb->request, | |
594 | sizeof(orb->request), DMA_TO_DEVICE); | |
8d8bb39b | 595 | if (dma_mapping_error(device->card->device, orb->base.request_bus)) |
7aa48481 SR |
596 | goto fail_mapping_request; |
597 | ||
5a3c2be6 SR |
598 | sbp2_send_orb(&orb->base, lu, node_id, generation, |
599 | lu->tgt->management_agent_address); | |
9ba136d0 | 600 | |
a4c379c1 | 601 | wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout)); |
9ba136d0 | 602 | |
9ba136d0 | 603 | retval = -EIO; |
5a3c2be6 | 604 | if (sbp2_cancel_orbs(lu) == 0) { |
48f18c76 SR |
605 | fw_error("%s: orb reply timed out, rcode=0x%02x\n", |
606 | lu->tgt->bus_id, orb->base.rcode); | |
9ba136d0 KH |
607 | goto out; |
608 | } | |
609 | ||
2aaad97b | 610 | if (orb->base.rcode != RCODE_COMPLETE) { |
48f18c76 SR |
611 | fw_error("%s: management write failed, rcode 0x%02x\n", |
612 | lu->tgt->bus_id, orb->base.rcode); | |
9ba136d0 KH |
613 | goto out; |
614 | } | |
615 | ||
a77754a7 KH |
616 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
617 | STATUS_GET_SBP_STATUS(orb->status) != 0) { | |
48f18c76 | 618 | fw_error("%s: error status: %d:%d\n", lu->tgt->bus_id, |
a77754a7 KH |
619 | STATUS_GET_RESPONSE(orb->status), |
620 | STATUS_GET_SBP_STATUS(orb->status)); | |
9ba136d0 KH |
621 | goto out; |
622 | } | |
623 | ||
624 | retval = 0; | |
625 | out: | |
626 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 627 | sizeof(orb->request), DMA_TO_DEVICE); |
7aa48481 | 628 | fail_mapping_request: |
9ba136d0 | 629 | dma_unmap_single(device->card->device, orb->response_bus, |
2d826cc5 | 630 | sizeof(orb->response), DMA_FROM_DEVICE); |
7aa48481 | 631 | fail_mapping_response: |
9ba136d0 | 632 | if (response) |
71ee9f01 | 633 | memcpy(response, orb->response, sizeof(orb->response)); |
e57d2011 | 634 | kref_put(&orb->base.kref, free_orb); |
9ba136d0 KH |
635 | |
636 | return retval; | |
637 | } | |
638 | ||
e0e60215 SR |
639 | static void sbp2_agent_reset(struct sbp2_logical_unit *lu) |
640 | { | |
641 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); | |
1e119fa9 | 642 | __be32 d = 0; |
9ba136d0 | 643 | |
1e119fa9 JF |
644 | fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, |
645 | lu->tgt->node_id, lu->generation, device->max_speed, | |
646 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
647 | &d, sizeof(d)); | |
9ba136d0 KH |
648 | } |
649 | ||
e0e60215 SR |
650 | static void |
651 | complete_agent_reset_write_no_wait(struct fw_card *card, int rcode, | |
652 | void *payload, size_t length, void *data) | |
653 | { | |
654 | kfree(data); | |
655 | } | |
656 | ||
657 | static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu) | |
9ba136d0 | 658 | { |
5a3c2be6 | 659 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 | 660 | struct fw_transaction *t; |
1e119fa9 | 661 | static __be32 d; |
9ba136d0 | 662 | |
e0e60215 | 663 | t = kmalloc(sizeof(*t), GFP_ATOMIC); |
9ba136d0 | 664 | if (t == NULL) |
e0e60215 | 665 | return; |
9ba136d0 KH |
666 | |
667 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
5a3c2be6 SR |
668 | lu->tgt->node_id, lu->generation, device->max_speed, |
669 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
1e119fa9 | 670 | &d, sizeof(d), complete_agent_reset_write_no_wait, t); |
9ba136d0 KH |
671 | } |
672 | ||
2e2705bd SR |
673 | static inline void sbp2_allow_block(struct sbp2_logical_unit *lu) |
674 | { | |
675 | /* | |
676 | * We may access dont_block without taking card->lock here: | |
677 | * All callers of sbp2_allow_block() and all callers of sbp2_unblock() | |
678 | * are currently serialized against each other. | |
679 | * And a wrong result in sbp2_conditionally_block()'s access of | |
680 | * dont_block is rather harmless, it simply misses its first chance. | |
681 | */ | |
682 | --lu->tgt->dont_block; | |
683 | } | |
684 | ||
685 | /* | |
686 | * Blocks lu->tgt if all of the following conditions are met: | |
687 | * - Login, INQUIRY, and high-level SCSI setup of all of the target's | |
688 | * logical units have been finished (indicated by dont_block == 0). | |
689 | * - lu->generation is stale. | |
690 | * | |
691 | * Note, scsi_block_requests() must be called while holding card->lock, | |
692 | * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to | |
693 | * unblock the target. | |
694 | */ | |
695 | static void sbp2_conditionally_block(struct sbp2_logical_unit *lu) | |
696 | { | |
697 | struct sbp2_target *tgt = lu->tgt; | |
698 | struct fw_card *card = fw_device(tgt->unit->device.parent)->card; | |
699 | struct Scsi_Host *shost = | |
700 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
701 | unsigned long flags; | |
702 | ||
703 | spin_lock_irqsave(&card->lock, flags); | |
704 | if (!tgt->dont_block && !lu->blocked && | |
705 | lu->generation != card->generation) { | |
706 | lu->blocked = true; | |
a5fd9ec7 | 707 | if (++tgt->blocked == 1) |
2e2705bd | 708 | scsi_block_requests(shost); |
2e2705bd SR |
709 | } |
710 | spin_unlock_irqrestore(&card->lock, flags); | |
711 | } | |
712 | ||
713 | /* | |
714 | * Unblocks lu->tgt as soon as all its logical units can be unblocked. | |
715 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
716 | * card->lock protected section. On the other hand, running it inside | |
717 | * the section might clash with shost->host_lock. | |
718 | */ | |
719 | static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu) | |
720 | { | |
721 | struct sbp2_target *tgt = lu->tgt; | |
722 | struct fw_card *card = fw_device(tgt->unit->device.parent)->card; | |
723 | struct Scsi_Host *shost = | |
724 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
725 | unsigned long flags; | |
726 | bool unblock = false; | |
727 | ||
728 | spin_lock_irqsave(&card->lock, flags); | |
729 | if (lu->blocked && lu->generation == card->generation) { | |
730 | lu->blocked = false; | |
731 | unblock = --tgt->blocked == 0; | |
732 | } | |
733 | spin_unlock_irqrestore(&card->lock, flags); | |
734 | ||
a5fd9ec7 | 735 | if (unblock) |
2e2705bd | 736 | scsi_unblock_requests(shost); |
2e2705bd SR |
737 | } |
738 | ||
739 | /* | |
740 | * Prevents future blocking of tgt and unblocks it. | |
741 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
742 | * card->lock protected section. On the other hand, running it inside | |
743 | * the section might clash with shost->host_lock. | |
744 | */ | |
745 | static void sbp2_unblock(struct sbp2_target *tgt) | |
746 | { | |
747 | struct fw_card *card = fw_device(tgt->unit->device.parent)->card; | |
748 | struct Scsi_Host *shost = | |
749 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
750 | unsigned long flags; | |
751 | ||
752 | spin_lock_irqsave(&card->lock, flags); | |
753 | ++tgt->dont_block; | |
754 | spin_unlock_irqrestore(&card->lock, flags); | |
755 | ||
756 | scsi_unblock_requests(shost); | |
757 | } | |
758 | ||
f8436158 SR |
759 | static int sbp2_lun2int(u16 lun) |
760 | { | |
761 | struct scsi_lun eight_bytes_lun; | |
762 | ||
763 | memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); | |
764 | eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff; | |
765 | eight_bytes_lun.scsi_lun[1] = lun & 0xff; | |
766 | ||
767 | return scsilun_to_int(&eight_bytes_lun); | |
768 | } | |
769 | ||
5a3c2be6 | 770 | static void sbp2_release_target(struct kref *kref) |
b3d6e151 | 771 | { |
5a3c2be6 SR |
772 | struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref); |
773 | struct sbp2_logical_unit *lu, *next; | |
774 | struct Scsi_Host *shost = | |
775 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
f8436158 | 776 | struct scsi_device *sdev; |
855c603d | 777 | struct fw_device *device = fw_device(tgt->unit->device.parent); |
5a3c2be6 | 778 | |
2e2705bd SR |
779 | /* prevent deadlocks */ |
780 | sbp2_unblock(tgt); | |
781 | ||
5a3c2be6 | 782 | list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { |
f8436158 SR |
783 | sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun)); |
784 | if (sdev) { | |
785 | scsi_remove_device(sdev); | |
786 | scsi_device_put(sdev); | |
33f1c6c3 | 787 | } |
cd1f70fd JF |
788 | if (lu->login_id != INVALID_LOGIN_ID) { |
789 | int generation, node_id; | |
790 | /* | |
791 | * tgt->node_id may be obsolete here if we failed | |
792 | * during initial login or after a bus reset where | |
793 | * the topology changed. | |
794 | */ | |
795 | generation = device->generation; | |
796 | smp_rmb(); /* node_id vs. generation */ | |
797 | node_id = device->node_id; | |
798 | sbp2_send_management_orb(lu, node_id, generation, | |
799 | SBP2_LOGOUT_REQUEST, | |
800 | lu->login_id, NULL); | |
801 | } | |
5a3c2be6 SR |
802 | fw_core_remove_address_handler(&lu->address_handler); |
803 | list_del(&lu->link); | |
804 | kfree(lu); | |
805 | } | |
806 | scsi_remove_host(shost); | |
f32ddadd | 807 | fw_notify("released %s, target %d:0:0\n", tgt->bus_id, shost->host_no); |
5a3c2be6 | 808 | |
1dc3bea7 | 809 | fw_unit_put(tgt->unit); |
5a3c2be6 | 810 | scsi_host_put(shost); |
855c603d | 811 | fw_device_put(device); |
b3d6e151 KH |
812 | } |
813 | ||
df8ec249 SR |
814 | static struct workqueue_struct *sbp2_wq; |
815 | ||
cd1f70fd JF |
816 | static void sbp2_target_put(struct sbp2_target *tgt) |
817 | { | |
818 | kref_put(&tgt->kref, sbp2_release_target); | |
819 | } | |
820 | ||
285838eb SR |
821 | /* |
822 | * Always get the target's kref when scheduling work on one its units. | |
823 | * Each workqueue job is responsible to call sbp2_target_put() upon return. | |
824 | */ | |
825 | static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay) | |
826 | { | |
cd1f70fd JF |
827 | kref_get(&lu->tgt->kref); |
828 | if (!queue_delayed_work(sbp2_wq, &lu->work, delay)) | |
829 | sbp2_target_put(lu->tgt); | |
285838eb SR |
830 | } |
831 | ||
17cff9ff JW |
832 | /* |
833 | * Write retransmit retry values into the BUSY_TIMEOUT register. | |
834 | * - The single-phase retry protocol is supported by all SBP-2 devices, but the | |
835 | * default retry_limit value is 0 (i.e. never retry transmission). We write a | |
836 | * saner value after logging into the device. | |
837 | * - The dual-phase retry protocol is optional to implement, and if not | |
838 | * supported, writes to the dual-phase portion of the register will be | |
839 | * ignored. We try to write the original 1394-1995 default here. | |
840 | * - In the case of devices that are also SBP-3-compliant, all writes are | |
841 | * ignored, as the register is read-only, but contains single-phase retry of | |
842 | * 15, which is what we're trying to set for all SBP-2 device anyway, so this | |
843 | * write attempt is safe and yields more consistent behavior for all devices. | |
844 | * | |
845 | * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec, | |
846 | * and section 6.4 of the SBP-3 spec for further details. | |
847 | */ | |
51f9dbef JW |
848 | static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu) |
849 | { | |
850 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); | |
1e119fa9 | 851 | __be32 d = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT); |
51f9dbef | 852 | |
1e119fa9 JF |
853 | fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, |
854 | lu->tgt->node_id, lu->generation, device->max_speed, | |
855 | CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT, | |
856 | &d, sizeof(d)); | |
51f9dbef JW |
857 | } |
858 | ||
5a3c2be6 SR |
859 | static void sbp2_reconnect(struct work_struct *work); |
860 | ||
7f37c426 KH |
861 | static void sbp2_login(struct work_struct *work) |
862 | { | |
5a3c2be6 SR |
863 | struct sbp2_logical_unit *lu = |
864 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 SR |
865 | struct sbp2_target *tgt = lu->tgt; |
866 | struct fw_device *device = fw_device(tgt->unit->device.parent); | |
867 | struct Scsi_Host *shost; | |
5a3c2be6 | 868 | struct scsi_device *sdev; |
7f37c426 | 869 | struct sbp2_login_response response; |
5a3c2be6 | 870 | int generation, node_id, local_node_id; |
7f37c426 | 871 | |
be6f48b0 SR |
872 | if (fw_device_is_shutdown(device)) |
873 | goto out; | |
874 | ||
5a8a1bcd | 875 | generation = device->generation; |
621f6dd7 | 876 | smp_rmb(); /* node IDs must not be older than generation */ |
5a8a1bcd SR |
877 | node_id = device->node_id; |
878 | local_node_id = device->card->node_id; | |
7f37c426 | 879 | |
ce896d95 | 880 | /* If this is a re-login attempt, log out, or we might be rejected. */ |
f8436158 | 881 | if (lu->has_sdev) |
ce896d95 SR |
882 | sbp2_send_management_orb(lu, device->node_id, generation, |
883 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
884 | ||
5a3c2be6 SR |
885 | if (sbp2_send_management_orb(lu, node_id, generation, |
886 | SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { | |
2e2705bd | 887 | if (lu->retries++ < 5) { |
285838eb | 888 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
2e2705bd | 889 | } else { |
48f18c76 SR |
890 | fw_error("%s: failed to login to LUN %04x\n", |
891 | tgt->bus_id, lu->lun); | |
2e2705bd SR |
892 | /* Let any waiting I/O fail from now on. */ |
893 | sbp2_unblock(lu->tgt); | |
894 | } | |
285838eb | 895 | goto out; |
7f37c426 KH |
896 | } |
897 | ||
48f18c76 SR |
898 | tgt->node_id = node_id; |
899 | tgt->address_high = local_node_id << 16; | |
621f6dd7 SR |
900 | smp_wmb(); /* node IDs must not be older than generation */ |
901 | lu->generation = generation; | |
7f37c426 | 902 | |
5a3c2be6 | 903 | lu->command_block_agent_address = |
71ee9f01 SR |
904 | ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff) |
905 | << 32) | be32_to_cpu(response.command_block_agent.low); | |
906 | lu->login_id = be32_to_cpu(response.misc) & 0xffff; | |
7f37c426 | 907 | |
48f18c76 SR |
908 | fw_notify("%s: logged in to LUN %04x (%d retries)\n", |
909 | tgt->bus_id, lu->lun, lu->retries); | |
7f37c426 | 910 | |
51f9dbef JW |
911 | /* set appropriate retry limit(s) in BUSY_TIMEOUT register */ |
912 | sbp2_set_busy_timeout(lu); | |
7f37c426 | 913 | |
5a3c2be6 SR |
914 | PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect); |
915 | sbp2_agent_reset(lu); | |
916 | ||
0fa6dfdb | 917 | /* This was a re-login. */ |
f8436158 | 918 | if (lu->has_sdev) { |
0fa6dfdb | 919 | sbp2_cancel_orbs(lu); |
2e2705bd | 920 | sbp2_conditionally_unblock(lu); |
0fa6dfdb SR |
921 | goto out; |
922 | } | |
923 | ||
9220f194 SR |
924 | if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) |
925 | ssleep(SBP2_INQUIRY_DELAY); | |
926 | ||
48f18c76 | 927 | shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
f8436158 | 928 | sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu); |
e80de370 SR |
929 | /* |
930 | * FIXME: We are unable to perform reconnects while in sbp2_login(). | |
931 | * Therefore __scsi_add_device() will get into trouble if a bus reset | |
932 | * happens in parallel. It will either fail or leave us with an | |
933 | * unusable sdev. As a workaround we check for this and retry the | |
934 | * whole login and SCSI probing. | |
935 | */ | |
1b9c12ba | 936 | |
e80de370 SR |
937 | /* Reported error during __scsi_add_device() */ |
938 | if (IS_ERR(sdev)) | |
939 | goto out_logout_login; | |
940 | ||
e80de370 SR |
941 | /* Unreported error during __scsi_add_device() */ |
942 | smp_rmb(); /* get current card generation */ | |
943 | if (generation != device->card->generation) { | |
944 | scsi_remove_device(sdev); | |
33f1c6c3 | 945 | scsi_device_put(sdev); |
e80de370 | 946 | goto out_logout_login; |
7f37c426 | 947 | } |
e80de370 SR |
948 | |
949 | /* No error during __scsi_add_device() */ | |
f8436158 SR |
950 | lu->has_sdev = true; |
951 | scsi_device_put(sdev); | |
2e2705bd | 952 | sbp2_allow_block(lu); |
e80de370 SR |
953 | goto out; |
954 | ||
955 | out_logout_login: | |
956 | smp_rmb(); /* generation may have changed */ | |
957 | generation = device->generation; | |
958 | smp_rmb(); /* node_id must not be older than generation */ | |
959 | ||
960 | sbp2_send_management_orb(lu, device->node_id, generation, | |
961 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
962 | /* | |
963 | * If a bus reset happened, sbp2_update will have requeued | |
964 | * lu->work already. Reset the work from reconnect to login. | |
965 | */ | |
966 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); | |
285838eb | 967 | out: |
48f18c76 | 968 | sbp2_target_put(tgt); |
7f37c426 | 969 | } |
9ba136d0 | 970 | |
5a3c2be6 | 971 | static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) |
9ba136d0 | 972 | { |
5a3c2be6 | 973 | struct sbp2_logical_unit *lu; |
9ba136d0 | 974 | |
5a3c2be6 SR |
975 | lu = kmalloc(sizeof(*lu), GFP_KERNEL); |
976 | if (!lu) | |
977 | return -ENOMEM; | |
9ba136d0 | 978 | |
5a3c2be6 SR |
979 | lu->address_handler.length = 0x100; |
980 | lu->address_handler.address_callback = sbp2_status_write; | |
981 | lu->address_handler.callback_data = lu; | |
9ba136d0 | 982 | |
5a3c2be6 SR |
983 | if (fw_core_add_address_handler(&lu->address_handler, |
984 | &fw_high_memory_region) < 0) { | |
985 | kfree(lu); | |
986 | return -ENOMEM; | |
987 | } | |
9ba136d0 | 988 | |
f8436158 SR |
989 | lu->tgt = tgt; |
990 | lu->lun = lun_entry & 0xffff; | |
cd1f70fd | 991 | lu->login_id = INVALID_LOGIN_ID; |
f8436158 SR |
992 | lu->retries = 0; |
993 | lu->has_sdev = false; | |
994 | lu->blocked = false; | |
2e2705bd | 995 | ++tgt->dont_block; |
5a3c2be6 SR |
996 | INIT_LIST_HEAD(&lu->orb_list); |
997 | INIT_DELAYED_WORK(&lu->work, sbp2_login); | |
9ba136d0 | 998 | |
5a3c2be6 SR |
999 | list_add_tail(&lu->link, &tgt->lu_list); |
1000 | return 0; | |
1001 | } | |
ad85274f | 1002 | |
5a3c2be6 SR |
1003 | static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory) |
1004 | { | |
1005 | struct fw_csr_iterator ci; | |
1006 | int key, value; | |
9ba136d0 | 1007 | |
5a3c2be6 SR |
1008 | fw_csr_iterator_init(&ci, directory); |
1009 | while (fw_csr_iterator_next(&ci, &key, &value)) | |
1010 | if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && | |
1011 | sbp2_add_logical_unit(tgt, value) < 0) | |
1012 | return -ENOMEM; | |
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory, | |
1017 | u32 *model, u32 *firmware_revision) | |
1018 | { | |
1019 | struct fw_csr_iterator ci; | |
1020 | int key, value; | |
384170da | 1021 | unsigned int timeout; |
5a3c2be6 SR |
1022 | |
1023 | fw_csr_iterator_init(&ci, directory); | |
9ba136d0 KH |
1024 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
1025 | switch (key) { | |
5a3c2be6 | 1026 | |
9ba136d0 | 1027 | case CSR_DEPENDENT_INFO | CSR_OFFSET: |
5a3c2be6 SR |
1028 | tgt->management_agent_address = |
1029 | CSR_REGISTER_BASE + 4 * value; | |
9ba136d0 | 1030 | break; |
5a3c2be6 SR |
1031 | |
1032 | case CSR_DIRECTORY_ID: | |
1033 | tgt->directory_id = value; | |
9ba136d0 | 1034 | break; |
5a3c2be6 | 1035 | |
9ba136d0 | 1036 | case CSR_MODEL: |
5a3c2be6 SR |
1037 | *model = value; |
1038 | break; | |
1039 | ||
1040 | case SBP2_CSR_FIRMWARE_REVISION: | |
1041 | *firmware_revision = value; | |
1042 | break; | |
1043 | ||
384170da JW |
1044 | case SBP2_CSR_UNIT_CHARACTERISTICS: |
1045 | /* the timeout value is stored in 500ms units */ | |
1046 | timeout = ((unsigned int) value >> 8 & 0xff) * 500; | |
1047 | timeout = max(timeout, SBP2_MIN_LOGIN_ORB_TIMEOUT); | |
1048 | tgt->mgt_orb_timeout = | |
1049 | min(timeout, SBP2_MAX_LOGIN_ORB_TIMEOUT); | |
1050 | ||
1051 | if (timeout > tgt->mgt_orb_timeout) | |
1052 | fw_notify("%s: config rom contains %ds " | |
1053 | "management ORB timeout, limiting " | |
48f18c76 | 1054 | "to %ds\n", tgt->bus_id, |
384170da JW |
1055 | timeout / 1000, |
1056 | tgt->mgt_orb_timeout / 1000); | |
1057 | break; | |
1058 | ||
5a3c2be6 SR |
1059 | case SBP2_CSR_LOGICAL_UNIT_NUMBER: |
1060 | if (sbp2_add_logical_unit(tgt, value) < 0) | |
1061 | return -ENOMEM; | |
1062 | break; | |
1063 | ||
1064 | case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: | |
0e3e2eab RS |
1065 | /* Adjust for the increment in the iterator */ |
1066 | if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0) | |
5a3c2be6 | 1067 | return -ENOMEM; |
9ba136d0 KH |
1068 | break; |
1069 | } | |
1070 | } | |
5a3c2be6 SR |
1071 | return 0; |
1072 | } | |
1073 | ||
1074 | static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, | |
1075 | u32 firmware_revision) | |
1076 | { | |
1077 | int i; | |
05cca738 | 1078 | unsigned int w = sbp2_param_workarounds; |
2df222b8 SR |
1079 | |
1080 | if (w) | |
1081 | fw_notify("Please notify linux1394-devel@lists.sourceforge.net " | |
1082 | "if you need the workarounds parameter for %s\n", | |
48f18c76 | 1083 | tgt->bus_id); |
5a3c2be6 | 1084 | |
2df222b8 SR |
1085 | if (w & SBP2_WORKAROUND_OVERRIDE) |
1086 | goto out; | |
9ba136d0 KH |
1087 | |
1088 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
5a3c2be6 | 1089 | |
9ba136d0 KH |
1090 | if (sbp2_workarounds_table[i].firmware_revision != |
1091 | (firmware_revision & 0xffffff00)) | |
1092 | continue; | |
5a3c2be6 | 1093 | |
9ba136d0 KH |
1094 | if (sbp2_workarounds_table[i].model != model && |
1095 | sbp2_workarounds_table[i].model != ~0) | |
1096 | continue; | |
5a3c2be6 | 1097 | |
2df222b8 | 1098 | w |= sbp2_workarounds_table[i].workarounds; |
9ba136d0 KH |
1099 | break; |
1100 | } | |
2df222b8 SR |
1101 | out: |
1102 | if (w) | |
5a3c2be6 | 1103 | fw_notify("Workarounds for %s: 0x%x " |
9ba136d0 | 1104 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", |
48f18c76 | 1105 | tgt->bus_id, w, firmware_revision, model); |
2df222b8 | 1106 | tgt->workarounds = w; |
5a3c2be6 SR |
1107 | } |
1108 | ||
1109 | static struct scsi_host_template scsi_driver_template; | |
1110 | ||
1111 | static int sbp2_probe(struct device *dev) | |
1112 | { | |
1113 | struct fw_unit *unit = fw_unit(dev); | |
1114 | struct fw_device *device = fw_device(unit->device.parent); | |
1115 | struct sbp2_target *tgt; | |
1116 | struct sbp2_logical_unit *lu; | |
1117 | struct Scsi_Host *shost; | |
1118 | u32 model, firmware_revision; | |
1119 | ||
09b12dd4 SR |
1120 | if (dma_get_max_seg_size(device->card->device) > SBP2_MAX_SEG_SIZE) |
1121 | BUG_ON(dma_set_max_seg_size(device->card->device, | |
1122 | SBP2_MAX_SEG_SIZE)); | |
1123 | ||
5a3c2be6 SR |
1124 | shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); |
1125 | if (shost == NULL) | |
1126 | return -ENOMEM; | |
1127 | ||
1128 | tgt = (struct sbp2_target *)shost->hostdata; | |
1129 | unit->device.driver_data = tgt; | |
1130 | tgt->unit = unit; | |
1131 | kref_init(&tgt->kref); | |
1132 | INIT_LIST_HEAD(&tgt->lu_list); | |
a1f64819 | 1133 | tgt->bus_id = dev_name(&unit->device); |
c9755e14 | 1134 | tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; |
5a3c2be6 SR |
1135 | |
1136 | if (fw_device_enable_phys_dma(device) < 0) | |
1137 | goto fail_shost_put; | |
1138 | ||
1139 | if (scsi_add_host(shost, &unit->device) < 0) | |
1140 | goto fail_shost_put; | |
1141 | ||
855c603d | 1142 | fw_device_get(device); |
1dc3bea7 | 1143 | fw_unit_get(unit); |
855c603d | 1144 | |
5a3c2be6 SR |
1145 | /* Initialize to values that won't match anything in our table. */ |
1146 | firmware_revision = 0xff000000; | |
1147 | model = 0xff000000; | |
1148 | ||
1149 | /* implicit directory ID */ | |
1150 | tgt->directory_id = ((unit->directory - device->config_rom) * 4 | |
1151 | + CSR_CONFIG_ROM) & 0xffffff; | |
1152 | ||
1153 | if (sbp2_scan_unit_dir(tgt, unit->directory, &model, | |
1154 | &firmware_revision) < 0) | |
1155 | goto fail_tgt_put; | |
1156 | ||
1157 | sbp2_init_workarounds(tgt, model, firmware_revision); | |
9ba136d0 | 1158 | |
285838eb | 1159 | /* Do the login in a workqueue so we can easily reschedule retries. */ |
5a3c2be6 | 1160 | list_for_each_entry(lu, &tgt->lu_list, link) |
0dcfeb7e | 1161 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
9ba136d0 | 1162 | return 0; |
ad85274f | 1163 | |
5a3c2be6 | 1164 | fail_tgt_put: |
285838eb | 1165 | sbp2_target_put(tgt); |
5a3c2be6 SR |
1166 | return -ENOMEM; |
1167 | ||
1168 | fail_shost_put: | |
1169 | scsi_host_put(shost); | |
1170 | return -ENOMEM; | |
9ba136d0 KH |
1171 | } |
1172 | ||
1173 | static int sbp2_remove(struct device *dev) | |
1174 | { | |
1175 | struct fw_unit *unit = fw_unit(dev); | |
5a3c2be6 | 1176 | struct sbp2_target *tgt = unit->device.driver_data; |
9ba136d0 | 1177 | |
285838eb | 1178 | sbp2_target_put(tgt); |
9ba136d0 KH |
1179 | return 0; |
1180 | } | |
1181 | ||
1182 | static void sbp2_reconnect(struct work_struct *work) | |
1183 | { | |
5a3c2be6 SR |
1184 | struct sbp2_logical_unit *lu = |
1185 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 SR |
1186 | struct sbp2_target *tgt = lu->tgt; |
1187 | struct fw_device *device = fw_device(tgt->unit->device.parent); | |
9ba136d0 KH |
1188 | int generation, node_id, local_node_id; |
1189 | ||
be6f48b0 SR |
1190 | if (fw_device_is_shutdown(device)) |
1191 | goto out; | |
1192 | ||
5a8a1bcd | 1193 | generation = device->generation; |
621f6dd7 | 1194 | smp_rmb(); /* node IDs must not be older than generation */ |
5a8a1bcd SR |
1195 | node_id = device->node_id; |
1196 | local_node_id = device->card->node_id; | |
9ba136d0 | 1197 | |
5a3c2be6 | 1198 | if (sbp2_send_management_orb(lu, node_id, generation, |
7f37c426 | 1199 | SBP2_RECONNECT_REQUEST, |
5a3c2be6 | 1200 | lu->login_id, NULL) < 0) { |
ce896d95 SR |
1201 | /* |
1202 | * If reconnect was impossible even though we are in the | |
1203 | * current generation, fall back and try to log in again. | |
1204 | * | |
1205 | * We could check for "Function rejected" status, but | |
1206 | * looking at the bus generation as simpler and more general. | |
1207 | */ | |
1208 | smp_rmb(); /* get current card generation */ | |
1209 | if (generation == device->card->generation || | |
1210 | lu->retries++ >= 5) { | |
48f18c76 | 1211 | fw_error("%s: failed to reconnect\n", tgt->bus_id); |
5a3c2be6 SR |
1212 | lu->retries = 0; |
1213 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); | |
7f37c426 | 1214 | } |
285838eb SR |
1215 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
1216 | goto out; | |
7f37c426 | 1217 | } |
9ba136d0 | 1218 | |
48f18c76 SR |
1219 | tgt->node_id = node_id; |
1220 | tgt->address_high = local_node_id << 16; | |
621f6dd7 SR |
1221 | smp_wmb(); /* node IDs must not be older than generation */ |
1222 | lu->generation = generation; | |
7f37c426 | 1223 | |
48f18c76 SR |
1224 | fw_notify("%s: reconnected to LUN %04x (%d retries)\n", |
1225 | tgt->bus_id, lu->lun, lu->retries); | |
5a3c2be6 SR |
1226 | |
1227 | sbp2_agent_reset(lu); | |
1228 | sbp2_cancel_orbs(lu); | |
2e2705bd | 1229 | sbp2_conditionally_unblock(lu); |
285838eb | 1230 | out: |
48f18c76 | 1231 | sbp2_target_put(tgt); |
9ba136d0 KH |
1232 | } |
1233 | ||
1234 | static void sbp2_update(struct fw_unit *unit) | |
1235 | { | |
5a3c2be6 SR |
1236 | struct sbp2_target *tgt = unit->device.driver_data; |
1237 | struct sbp2_logical_unit *lu; | |
9ba136d0 | 1238 | |
5a3c2be6 SR |
1239 | fw_device_enable_phys_dma(fw_device(unit->device.parent)); |
1240 | ||
1241 | /* | |
1242 | * Fw-core serializes sbp2_update() against sbp2_remove(). | |
1243 | * Iteration over tgt->lu_list is therefore safe here. | |
1244 | */ | |
1245 | list_for_each_entry(lu, &tgt->lu_list, link) { | |
2e2705bd | 1246 | sbp2_conditionally_block(lu); |
5a3c2be6 | 1247 | lu->retries = 0; |
285838eb | 1248 | sbp2_queue_work(lu, 0); |
5a3c2be6 | 1249 | } |
9ba136d0 KH |
1250 | } |
1251 | ||
1252 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
1253 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
1254 | ||
21ebcd12 | 1255 | static const struct fw_device_id sbp2_id_table[] = { |
9ba136d0 KH |
1256 | { |
1257 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, | |
1258 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, | |
5af4e5ea | 1259 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
1260 | }, |
1261 | { } | |
1262 | }; | |
1263 | ||
1264 | static struct fw_driver sbp2_driver = { | |
1265 | .driver = { | |
1266 | .owner = THIS_MODULE, | |
1267 | .name = sbp2_driver_name, | |
1268 | .bus = &fw_bus_type, | |
1269 | .probe = sbp2_probe, | |
1270 | .remove = sbp2_remove, | |
1271 | }, | |
1272 | .update = sbp2_update, | |
1273 | .id_table = sbp2_id_table, | |
1274 | }; | |
1275 | ||
fbb5423c KH |
1276 | static unsigned int |
1277 | sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) | |
9ba136d0 | 1278 | { |
fbb5423c KH |
1279 | int sam_status; |
1280 | ||
9ba136d0 KH |
1281 | sense_data[0] = 0x70; |
1282 | sense_data[1] = 0x0; | |
1283 | sense_data[2] = sbp2_status[1]; | |
1284 | sense_data[3] = sbp2_status[4]; | |
1285 | sense_data[4] = sbp2_status[5]; | |
1286 | sense_data[5] = sbp2_status[6]; | |
1287 | sense_data[6] = sbp2_status[7]; | |
1288 | sense_data[7] = 10; | |
1289 | sense_data[8] = sbp2_status[8]; | |
1290 | sense_data[9] = sbp2_status[9]; | |
1291 | sense_data[10] = sbp2_status[10]; | |
1292 | sense_data[11] = sbp2_status[11]; | |
1293 | sense_data[12] = sbp2_status[2]; | |
1294 | sense_data[13] = sbp2_status[3]; | |
1295 | sense_data[14] = sbp2_status[12]; | |
1296 | sense_data[15] = sbp2_status[13]; | |
1297 | ||
fbb5423c | 1298 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 1299 | |
fbb5423c KH |
1300 | switch (sam_status) { |
1301 | case SAM_STAT_GOOD: | |
9ba136d0 | 1302 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 1303 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 1304 | case SAM_STAT_BUSY: |
9ba136d0 KH |
1305 | case SAM_STAT_RESERVATION_CONFLICT: |
1306 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
1307 | return DID_OK << 16 | sam_status; |
1308 | ||
9ba136d0 | 1309 | default: |
fbb5423c | 1310 | return DID_ERROR << 16; |
9ba136d0 KH |
1311 | } |
1312 | } | |
1313 | ||
1314 | static void | |
1315 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
1316 | { | |
6f061487 JF |
1317 | struct sbp2_command_orb *orb = |
1318 | container_of(base_orb, struct sbp2_command_orb, base); | |
5a3c2be6 | 1319 | struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent); |
9ba136d0 KH |
1320 | int result; |
1321 | ||
1322 | if (status != NULL) { | |
a77754a7 | 1323 | if (STATUS_GET_DEAD(*status)) |
e0e60215 | 1324 | sbp2_agent_reset_no_wait(orb->lu); |
9ba136d0 | 1325 | |
a77754a7 | 1326 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 1327 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 1328 | result = DID_OK << 16; |
9ba136d0 KH |
1329 | break; |
1330 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 1331 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
1332 | break; |
1333 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
1334 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
1335 | default: | |
fbb5423c | 1336 | result = DID_ERROR << 16; |
9ba136d0 KH |
1337 | break; |
1338 | } | |
1339 | ||
a77754a7 KH |
1340 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
1341 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
1342 | orb->cmd->sense_buffer); |
1343 | } else { | |
c781c06d KH |
1344 | /* |
1345 | * If the orb completes with status == NULL, something | |
9ba136d0 | 1346 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
1347 | * or when sending the write (less likely). |
1348 | */ | |
fbb5423c | 1349 | result = DID_BUS_BUSY << 16; |
2e2705bd | 1350 | sbp2_conditionally_block(orb->lu); |
9ba136d0 KH |
1351 | } |
1352 | ||
1353 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 1354 | sizeof(orb->request), DMA_TO_DEVICE); |
9ba136d0 | 1355 | |
412edf65 SR |
1356 | if (scsi_sg_count(orb->cmd) > 0) |
1357 | dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd), | |
1358 | scsi_sg_count(orb->cmd), | |
9ba136d0 | 1359 | orb->cmd->sc_data_direction); |
9ba136d0 KH |
1360 | |
1361 | if (orb->page_table_bus != 0) | |
1362 | dma_unmap_single(device->card->device, orb->page_table_bus, | |
b4be016a | 1363 | sizeof(orb->page_table), DMA_TO_DEVICE); |
9ba136d0 | 1364 | |
fbb5423c | 1365 | orb->cmd->result = result; |
9ba136d0 | 1366 | orb->done(orb->cmd); |
9ba136d0 KH |
1367 | } |
1368 | ||
5a3c2be6 SR |
1369 | static int |
1370 | sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device, | |
1371 | struct sbp2_logical_unit *lu) | |
9ba136d0 | 1372 | { |
09b12dd4 SR |
1373 | struct scatterlist *sg = scsi_sglist(orb->cmd); |
1374 | int i, n; | |
1375 | ||
1376 | n = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd), | |
1377 | orb->cmd->sc_data_direction); | |
1378 | if (n == 0) | |
95ffc5e3 | 1379 | goto fail; |
9ba136d0 | 1380 | |
c781c06d KH |
1381 | /* |
1382 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
1383 | * the scatter list by converting it to an immediate block |
1384 | * request. This is also a workaround for broken devices such | |
1385 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
1386 | * tables. |
1387 | */ | |
09b12dd4 | 1388 | if (n == 1) { |
71ee9f01 SR |
1389 | orb->request.data_descriptor.high = |
1390 | cpu_to_be32(lu->tgt->address_high); | |
1391 | orb->request.data_descriptor.low = | |
1392 | cpu_to_be32(sg_dma_address(sg)); | |
1393 | orb->request.misc |= | |
1394 | cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg))); | |
95ffc5e3 | 1395 | return 0; |
9ba136d0 KH |
1396 | } |
1397 | ||
09b12dd4 SR |
1398 | for_each_sg(sg, sg, n, i) { |
1399 | orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16); | |
1400 | orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg)); | |
9ba136d0 KH |
1401 | } |
1402 | ||
b4be016a SR |
1403 | orb->page_table_bus = |
1404 | dma_map_single(device->card->device, orb->page_table, | |
1405 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
8d8bb39b | 1406 | if (dma_mapping_error(device->card->device, orb->page_table_bus)) |
b4be016a | 1407 | goto fail_page_table; |
9ba136d0 | 1408 | |
c781c06d KH |
1409 | /* |
1410 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
1411 | * to fill in the node ID part of the address. All other |
1412 | * pointers assume that the data referenced reside on the | |
1413 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
1414 | * on other nodes so we need to put our ID in descriptor.high. |
1415 | */ | |
71ee9f01 SR |
1416 | orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high); |
1417 | orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus); | |
1418 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT | | |
09b12dd4 | 1419 | COMMAND_ORB_DATA_SIZE(n)); |
9ba136d0 | 1420 | |
95ffc5e3 KH |
1421 | return 0; |
1422 | ||
1423 | fail_page_table: | |
09b12dd4 SR |
1424 | dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd), |
1425 | scsi_sg_count(orb->cmd), orb->cmd->sc_data_direction); | |
95ffc5e3 KH |
1426 | fail: |
1427 | return -ENOMEM; | |
9ba136d0 KH |
1428 | } |
1429 | ||
9ba136d0 KH |
1430 | /* SCSI stack integration */ |
1431 | ||
1432 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |
1433 | { | |
5a3c2be6 SR |
1434 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
1435 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); | |
9ba136d0 | 1436 | struct sbp2_command_orb *orb; |
05cca738 | 1437 | unsigned int max_payload; |
4bbc1bdd | 1438 | int generation, retval = SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1439 | |
c781c06d KH |
1440 | /* |
1441 | * Bidirectional commands are not yet implemented, and unknown | |
1442 | * transfer direction not handled. | |
1443 | */ | |
9ba136d0 | 1444 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
8a8cea27 | 1445 | fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n"); |
e1b68c4d KH |
1446 | cmd->result = DID_ERROR << 16; |
1447 | done(cmd); | |
1448 | return 0; | |
9ba136d0 KH |
1449 | } |
1450 | ||
2d826cc5 | 1451 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
1452 | if (orb == NULL) { |
1453 | fw_notify("failed to alloc orb\n"); | |
5a3c2be6 | 1454 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 KH |
1455 | } |
1456 | ||
12f26aa1 KH |
1457 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
1458 | orb->base.rcode = -1; | |
e57d2011 | 1459 | kref_init(&orb->base.kref); |
9ba136d0 | 1460 | |
5a3c2be6 | 1461 | orb->lu = lu; |
9ba136d0 KH |
1462 | orb->done = done; |
1463 | orb->cmd = cmd; | |
1464 | ||
71ee9f01 | 1465 | orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL); |
c781c06d KH |
1466 | /* |
1467 | * At speed 100 we can do 512 bytes per packet, at speed 200, | |
9ba136d0 KH |
1468 | * 1024 bytes per packet etc. The SBP-2 max_payload field |
1469 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
c781c06d KH |
1470 | * if we set this to max_speed + 7, we get the right value. |
1471 | */ | |
25659f71 SR |
1472 | max_payload = min(device->max_speed + 7, |
1473 | device->card->max_receive - 1); | |
71ee9f01 | 1474 | orb->request.misc = cpu_to_be32( |
25659f71 | 1475 | COMMAND_ORB_MAX_PAYLOAD(max_payload) | |
f1397490 | 1476 | COMMAND_ORB_SPEED(device->max_speed) | |
71ee9f01 | 1477 | COMMAND_ORB_NOTIFY); |
9ba136d0 KH |
1478 | |
1479 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
0d7dcbf2 | 1480 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION); |
9ba136d0 | 1481 | |
4bbc1bdd SR |
1482 | generation = device->generation; |
1483 | smp_rmb(); /* sbp2_map_scatterlist looks at tgt->address_high */ | |
1484 | ||
5a3c2be6 SR |
1485 | if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) |
1486 | goto out; | |
9ba136d0 | 1487 | |
64a87b24 | 1488 | memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len); |
9ba136d0 KH |
1489 | |
1490 | orb->base.callback = complete_command_orb; | |
8526392a SR |
1491 | orb->base.request_bus = |
1492 | dma_map_single(device->card->device, &orb->request, | |
1493 | sizeof(orb->request), DMA_TO_DEVICE); | |
8d8bb39b | 1494 | if (dma_mapping_error(device->card->device, orb->base.request_bus)) |
5a3c2be6 | 1495 | goto out; |
82eff9db | 1496 | |
4bbc1bdd | 1497 | sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation, |
5a3c2be6 SR |
1498 | lu->command_block_agent_address + SBP2_ORB_POINTER); |
1499 | retval = 0; | |
1500 | out: | |
e57d2011 | 1501 | kref_put(&orb->base.kref, free_orb); |
5a3c2be6 | 1502 | return retval; |
9ba136d0 KH |
1503 | } |
1504 | ||
cfb01381 SR |
1505 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1506 | { | |
5a3c2be6 | 1507 | struct sbp2_logical_unit *lu = sdev->hostdata; |
cfb01381 | 1508 | |
5513c5f6 SR |
1509 | /* (Re-)Adding logical units via the SCSI stack is not supported. */ |
1510 | if (!lu) | |
1511 | return -ENOSYS; | |
1512 | ||
cfb01381 SR |
1513 | sdev->allow_restart = 1; |
1514 | ||
8ac3a47c SR |
1515 | /* SBP-2 requires quadlet alignment of the data buffers. */ |
1516 | blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1); | |
465ff318 | 1517 | |
5a3c2be6 | 1518 | if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
cfb01381 | 1519 | sdev->inquiry_len = 36; |
5a3c2be6 | 1520 | |
cfb01381 SR |
1521 | return 0; |
1522 | } | |
1523 | ||
9ba136d0 KH |
1524 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1525 | { | |
5a3c2be6 | 1526 | struct sbp2_logical_unit *lu = sdev->hostdata; |
9ba136d0 | 1527 | |
cfb01381 SR |
1528 | sdev->use_10_for_rw = 1; |
1529 | ||
2635f96f SR |
1530 | if (sbp2_param_exclusive_login) |
1531 | sdev->manage_start_stop = 1; | |
1532 | ||
cfb01381 SR |
1533 | if (sdev->type == TYPE_ROM) |
1534 | sdev->use_10_for_ms = 1; | |
5a3c2be6 | 1535 | |
9ba136d0 | 1536 | if (sdev->type == TYPE_DISK && |
5a3c2be6 | 1537 | lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
9ba136d0 | 1538 | sdev->skip_ms_page_8 = 1; |
5a3c2be6 SR |
1539 | |
1540 | if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) | |
9ba136d0 | 1541 | sdev->fix_capacity = 1; |
5a3c2be6 | 1542 | |
ffcaade3 SR |
1543 | if (lu->tgt->workarounds & SBP2_WORKAROUND_POWER_CONDITION) |
1544 | sdev->start_stop_pwr_cond = 1; | |
1545 | ||
5a3c2be6 | 1546 | if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
cf47c7a2 | 1547 | blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); |
5a3c2be6 | 1548 | |
09b12dd4 SR |
1549 | blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE); |
1550 | ||
9ba136d0 KH |
1551 | return 0; |
1552 | } | |
1553 | ||
1554 | /* | |
1555 | * Called by scsi stack when something has really gone wrong. Usually | |
1556 | * called when a command has timed-out for some reason. | |
1557 | */ | |
1558 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1559 | { | |
5a3c2be6 | 1560 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
9ba136d0 | 1561 | |
48f18c76 | 1562 | fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id); |
5a3c2be6 SR |
1563 | sbp2_agent_reset(lu); |
1564 | sbp2_cancel_orbs(lu); | |
9ba136d0 KH |
1565 | |
1566 | return SUCCESS; | |
1567 | } | |
1568 | ||
14e21986 SR |
1569 | /* |
1570 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: | |
1571 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) | |
1572 | * | |
1573 | * This is the concatenation of target port identifier and logical unit | |
1574 | * identifier as per SAM-2...SAM-4 annex A. | |
1575 | */ | |
1576 | static ssize_t | |
1577 | sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, | |
1578 | char *buf) | |
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 | { | |
df8ec249 SR |
1628 | sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME); |
1629 | if (!sbp2_wq) | |
1630 | return -ENOMEM; | |
1631 | ||
9ba136d0 KH |
1632 | return driver_register(&sbp2_driver.driver); |
1633 | } | |
1634 | ||
1635 | static void __exit sbp2_cleanup(void) | |
1636 | { | |
1637 | driver_unregister(&sbp2_driver.driver); | |
df8ec249 | 1638 | destroy_workqueue(sbp2_wq); |
9ba136d0 KH |
1639 | } |
1640 | ||
1641 | module_init(sbp2_init); | |
1642 | module_exit(sbp2_cleanup); |