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 SR |
31 | #include <linux/blkdev.h> |
32 | #include <linux/delay.h> | |
33 | #include <linux/device.h> | |
34 | #include <linux/dma-mapping.h> | |
9ba136d0 | 35 | #include <linux/kernel.h> |
7bb6bf7c | 36 | #include <linux/mod_devicetable.h> |
9ba136d0 | 37 | #include <linux/module.h> |
5cd54c94 | 38 | #include <linux/moduleparam.h> |
0b5b2903 | 39 | #include <linux/scatterlist.h> |
e7cdf237 | 40 | #include <linux/string.h> |
2df222b8 | 41 | #include <linux/stringify.h> |
1d3d52c5 | 42 | #include <linux/timer.h> |
df8ec249 | 43 | #include <linux/workqueue.h> |
b5d2a5e0 | 44 | #include <asm/system.h> |
9ba136d0 KH |
45 | |
46 | #include <scsi/scsi.h> | |
47 | #include <scsi/scsi_cmnd.h> | |
9ba136d0 KH |
48 | #include <scsi/scsi_device.h> |
49 | #include <scsi/scsi_host.h> | |
50 | ||
9ba136d0 | 51 | #include "fw-device.h" |
7bb6bf7c SR |
52 | #include "fw-topology.h" |
53 | #include "fw-transaction.h" | |
9ba136d0 | 54 | |
5cd54c94 SR |
55 | /* |
56 | * So far only bridges from Oxford Semiconductor are known to support | |
57 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
58 | * are possible on OXFW911 and newer Oxsemi bridges. | |
59 | * | |
60 | * Concurrent logins are useful together with cluster filesystems. | |
61 | */ | |
62 | static int sbp2_param_exclusive_login = 1; | |
63 | module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); | |
64 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " | |
65 | "(default = Y, use N for concurrent initiators)"); | |
66 | ||
2df222b8 SR |
67 | /* |
68 | * Flags for firmware oddities | |
69 | * | |
70 | * - 128kB max transfer | |
71 | * Limit transfer size. Necessary for some old bridges. | |
72 | * | |
73 | * - 36 byte inquiry | |
74 | * When scsi_mod probes the device, let the inquiry command look like that | |
75 | * from MS Windows. | |
76 | * | |
77 | * - skip mode page 8 | |
78 | * Suppress sending of mode_sense for mode page 8 if the device pretends to | |
79 | * support the SCSI Primary Block commands instead of Reduced Block Commands. | |
80 | * | |
81 | * - fix capacity | |
82 | * Tell sd_mod to correct the last sector number reported by read_capacity. | |
83 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. | |
84 | * Don't use this with devices which don't have this bug. | |
85 | * | |
9220f194 SR |
86 | * - delay inquiry |
87 | * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry. | |
88 | * | |
2df222b8 SR |
89 | * - override internal blacklist |
90 | * Instead of adding to the built-in blacklist, use only the workarounds | |
91 | * specified in the module load parameter. | |
92 | * Useful if a blacklist entry interfered with a non-broken device. | |
93 | */ | |
94 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 | |
95 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 | |
96 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 | |
97 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 | |
9220f194 SR |
98 | #define SBP2_WORKAROUND_DELAY_INQUIRY 0x10 |
99 | #define SBP2_INQUIRY_DELAY 12 | |
2df222b8 SR |
100 | #define SBP2_WORKAROUND_OVERRIDE 0x100 |
101 | ||
102 | static int sbp2_param_workarounds; | |
103 | module_param_named(workarounds, sbp2_param_workarounds, int, 0644); | |
104 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
105 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
106 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
107 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
108 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) | |
9220f194 | 109 | ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY) |
2df222b8 SR |
110 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
111 | ", or a combination)"); | |
112 | ||
9ba136d0 | 113 | /* I don't know why the SCSI stack doesn't define something like this... */ |
a98e2719 | 114 | typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); |
9ba136d0 KH |
115 | |
116 | static const char sbp2_driver_name[] = "sbp2"; | |
117 | ||
5a3c2be6 SR |
118 | /* |
119 | * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry | |
120 | * and one struct scsi_device per sbp2_logical_unit. | |
121 | */ | |
122 | struct sbp2_logical_unit { | |
123 | struct sbp2_target *tgt; | |
124 | struct list_head link; | |
9ba136d0 KH |
125 | struct fw_address_handler address_handler; |
126 | struct list_head orb_list; | |
5a3c2be6 | 127 | |
9ba136d0 | 128 | u64 command_block_agent_address; |
5a3c2be6 | 129 | u16 lun; |
9ba136d0 KH |
130 | int login_id; |
131 | ||
c781c06d | 132 | /* |
5a3c2be6 SR |
133 | * The generation is updated once we've logged in or reconnected |
134 | * to the logical unit. Thus, I/O to the device will automatically | |
135 | * fail and get retried if it happens in a window where the device | |
136 | * is not ready, e.g. after a bus reset but before we reconnect. | |
c781c06d | 137 | */ |
9ba136d0 | 138 | int generation; |
7f37c426 KH |
139 | int retries; |
140 | struct delayed_work work; | |
f8436158 | 141 | bool has_sdev; |
2e2705bd | 142 | bool blocked; |
9ba136d0 KH |
143 | }; |
144 | ||
5a3c2be6 SR |
145 | /* |
146 | * We create one struct sbp2_target per IEEE 1212 Unit Directory | |
147 | * and one struct Scsi_Host per sbp2_target. | |
148 | */ | |
149 | struct sbp2_target { | |
150 | struct kref kref; | |
151 | struct fw_unit *unit; | |
48f18c76 | 152 | const char *bus_id; |
05cca738 | 153 | struct list_head lu_list; |
5a3c2be6 SR |
154 | |
155 | u64 management_agent_address; | |
156 | int directory_id; | |
157 | int node_id; | |
158 | int address_high; | |
05cca738 | 159 | unsigned int workarounds; |
384170da | 160 | unsigned int mgt_orb_timeout; |
2e2705bd SR |
161 | |
162 | int dont_block; /* counter for each logical unit */ | |
163 | int blocked; /* ditto */ | |
5a3c2be6 SR |
164 | }; |
165 | ||
a4c379c1 JW |
166 | /* |
167 | * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be | |
384170da JW |
168 | * provided in the config rom. Most devices do provide a value, which |
169 | * we'll use for login management orbs, but with some sane limits. | |
a4c379c1 | 170 | */ |
384170da JW |
171 | #define SBP2_MIN_LOGIN_ORB_TIMEOUT 5000U /* Timeout in ms */ |
172 | #define SBP2_MAX_LOGIN_ORB_TIMEOUT 40000U /* Timeout in ms */ | |
05cca738 | 173 | #define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */ |
9ba136d0 | 174 | #define SBP2_ORB_NULL 0x80000000 |
a4c379c1 | 175 | #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 |
51f9dbef | 176 | #define SBP2_RETRY_LIMIT 0xf /* 15 retries */ |
9ba136d0 | 177 | |
9ba136d0 | 178 | /* Unit directory keys */ |
384170da | 179 | #define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a |
5a3c2be6 SR |
180 | #define SBP2_CSR_FIRMWARE_REVISION 0x3c |
181 | #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 | |
182 | #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 | |
9ba136d0 | 183 | |
9ba136d0 KH |
184 | /* Management orb opcodes */ |
185 | #define SBP2_LOGIN_REQUEST 0x0 | |
186 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 | |
187 | #define SBP2_RECONNECT_REQUEST 0x3 | |
188 | #define SBP2_SET_PASSWORD_REQUEST 0x4 | |
189 | #define SBP2_LOGOUT_REQUEST 0x7 | |
190 | #define SBP2_ABORT_TASK_REQUEST 0xb | |
191 | #define SBP2_ABORT_TASK_SET 0xc | |
192 | #define SBP2_LOGICAL_UNIT_RESET 0xe | |
193 | #define SBP2_TARGET_RESET_REQUEST 0xf | |
194 | ||
195 | /* Offsets for command block agent registers */ | |
196 | #define SBP2_AGENT_STATE 0x00 | |
197 | #define SBP2_AGENT_RESET 0x04 | |
198 | #define SBP2_ORB_POINTER 0x08 | |
199 | #define SBP2_DOORBELL 0x10 | |
200 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 | |
201 | ||
202 | /* Status write response codes */ | |
203 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 | |
204 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 | |
205 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 | |
206 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 | |
207 | ||
a77754a7 KH |
208 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
209 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) | |
210 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) | |
211 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) | |
212 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) | |
213 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) | |
214 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) | |
215 | #define STATUS_GET_DATA(v) ((v).data) | |
9ba136d0 KH |
216 | |
217 | struct sbp2_status { | |
218 | u32 status; | |
219 | u32 orb_low; | |
220 | u8 data[24]; | |
221 | }; | |
222 | ||
223 | struct sbp2_pointer { | |
71ee9f01 SR |
224 | __be32 high; |
225 | __be32 low; | |
9ba136d0 KH |
226 | }; |
227 | ||
228 | struct sbp2_orb { | |
229 | struct fw_transaction t; | |
e57d2011 | 230 | struct kref kref; |
9ba136d0 KH |
231 | dma_addr_t request_bus; |
232 | int rcode; | |
233 | struct sbp2_pointer pointer; | |
a98e2719 | 234 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
9ba136d0 KH |
235 | struct list_head link; |
236 | }; | |
237 | ||
a77754a7 KH |
238 | #define MANAGEMENT_ORB_LUN(v) ((v)) |
239 | #define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16) | |
240 | #define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20) | |
5cd54c94 | 241 | #define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0) |
a77754a7 KH |
242 | #define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29) |
243 | #define MANAGEMENT_ORB_NOTIFY ((1) << 31) | |
9ba136d0 | 244 | |
a77754a7 KH |
245 | #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) |
246 | #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) | |
9ba136d0 KH |
247 | |
248 | struct sbp2_management_orb { | |
249 | struct sbp2_orb base; | |
250 | struct { | |
251 | struct sbp2_pointer password; | |
252 | struct sbp2_pointer response; | |
71ee9f01 SR |
253 | __be32 misc; |
254 | __be32 length; | |
9ba136d0 KH |
255 | struct sbp2_pointer status_fifo; |
256 | } request; | |
257 | __be32 response[4]; | |
258 | dma_addr_t response_bus; | |
259 | struct completion done; | |
260 | struct sbp2_status status; | |
261 | }; | |
262 | ||
9ba136d0 | 263 | struct sbp2_login_response { |
71ee9f01 | 264 | __be32 misc; |
9ba136d0 | 265 | struct sbp2_pointer command_block_agent; |
71ee9f01 | 266 | __be32 reconnect_hold; |
9ba136d0 | 267 | }; |
a77754a7 KH |
268 | #define COMMAND_ORB_DATA_SIZE(v) ((v)) |
269 | #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) | |
270 | #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) | |
271 | #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) | |
272 | #define COMMAND_ORB_SPEED(v) ((v) << 24) | |
0d7dcbf2 | 273 | #define COMMAND_ORB_DIRECTION ((1) << 27) |
a77754a7 KH |
274 | #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) |
275 | #define COMMAND_ORB_NOTIFY ((1) << 31) | |
9ba136d0 KH |
276 | |
277 | struct sbp2_command_orb { | |
278 | struct sbp2_orb base; | |
279 | struct { | |
280 | struct sbp2_pointer next; | |
281 | struct sbp2_pointer data_descriptor; | |
71ee9f01 | 282 | __be32 misc; |
9ba136d0 KH |
283 | u8 command_block[12]; |
284 | } request; | |
285 | struct scsi_cmnd *cmd; | |
286 | scsi_done_fn_t done; | |
5a3c2be6 | 287 | struct sbp2_logical_unit *lu; |
9ba136d0 | 288 | |
9fb2dd12 | 289 | struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); |
9ba136d0 | 290 | dma_addr_t page_table_bus; |
9ba136d0 KH |
291 | }; |
292 | ||
293 | /* | |
294 | * List of devices with known bugs. | |
295 | * | |
296 | * The firmware_revision field, masked with 0xffff00, is the best | |
297 | * indicator for the type of bridge chip of a device. It yields a few | |
298 | * false positives but this did not break correctly behaving devices | |
299 | * so far. We use ~0 as a wildcard, since the 24 bit values we get | |
300 | * from the config rom can never match that. | |
301 | */ | |
302 | static const struct { | |
303 | u32 firmware_revision; | |
304 | u32 model; | |
05cca738 | 305 | unsigned int workarounds; |
9ba136d0 KH |
306 | } sbp2_workarounds_table[] = { |
307 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { | |
308 | .firmware_revision = 0x002800, | |
309 | .model = 0x001010, | |
310 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
311 | SBP2_WORKAROUND_MODE_SENSE_8, | |
312 | }, | |
9220f194 SR |
313 | /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { |
314 | .firmware_revision = 0x002800, | |
315 | .model = 0x000000, | |
316 | .workarounds = SBP2_WORKAROUND_DELAY_INQUIRY, | |
317 | }, | |
9ba136d0 KH |
318 | /* Initio bridges, actually only needed for some older ones */ { |
319 | .firmware_revision = 0x000200, | |
320 | .model = ~0, | |
321 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
322 | }, | |
323 | /* Symbios bridge */ { | |
324 | .firmware_revision = 0xa0b800, | |
325 | .model = ~0, | |
326 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
327 | }, | |
2aa9ff7f SR |
328 | /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ { |
329 | .firmware_revision = 0x002600, | |
330 | .model = ~0, | |
331 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
332 | }, | |
c781c06d KH |
333 | |
334 | /* | |
335 | * There are iPods (2nd gen, 3rd gen) with model_id == 0, but | |
9ba136d0 KH |
336 | * these iPods do not feature the read_capacity bug according |
337 | * to one report. Read_capacity behaviour as well as model_id | |
c781c06d KH |
338 | * could change due to Apple-supplied firmware updates though. |
339 | */ | |
340 | ||
9ba136d0 KH |
341 | /* iPod 4th generation. */ { |
342 | .firmware_revision = 0x0a2700, | |
343 | .model = 0x000021, | |
344 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
345 | }, | |
346 | /* iPod mini */ { | |
347 | .firmware_revision = 0x0a2700, | |
348 | .model = 0x000023, | |
349 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
350 | }, | |
351 | /* iPod Photo */ { | |
352 | .firmware_revision = 0x0a2700, | |
353 | .model = 0x00007e, | |
354 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
355 | } | |
356 | }; | |
357 | ||
e57d2011 KH |
358 | static void |
359 | free_orb(struct kref *kref) | |
360 | { | |
361 | struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); | |
362 | ||
363 | kfree(orb); | |
364 | } | |
365 | ||
9ba136d0 KH |
366 | static void |
367 | sbp2_status_write(struct fw_card *card, struct fw_request *request, | |
368 | int tcode, int destination, int source, | |
369 | int generation, int speed, | |
370 | unsigned long long offset, | |
371 | void *payload, size_t length, void *callback_data) | |
372 | { | |
5a3c2be6 | 373 | struct sbp2_logical_unit *lu = callback_data; |
9ba136d0 KH |
374 | struct sbp2_orb *orb; |
375 | struct sbp2_status status; | |
376 | size_t header_size; | |
377 | unsigned long flags; | |
378 | ||
379 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || | |
2d826cc5 | 380 | length == 0 || length > sizeof(status)) { |
9ba136d0 KH |
381 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
382 | return; | |
383 | } | |
384 | ||
385 | header_size = min(length, 2 * sizeof(u32)); | |
386 | fw_memcpy_from_be32(&status, payload, header_size); | |
387 | if (length > header_size) | |
388 | memcpy(status.data, payload + 8, length - header_size); | |
a77754a7 | 389 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
9ba136d0 KH |
390 | fw_notify("non-orb related status write, not handled\n"); |
391 | fw_send_response(card, request, RCODE_COMPLETE); | |
392 | return; | |
393 | } | |
394 | ||
395 | /* Lookup the orb corresponding to this status write. */ | |
396 | spin_lock_irqsave(&card->lock, flags); | |
5a3c2be6 | 397 | list_for_each_entry(orb, &lu->orb_list, link) { |
a77754a7 | 398 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
e57d2011 KH |
399 | STATUS_GET_ORB_LOW(status) == orb->request_bus) { |
400 | orb->rcode = RCODE_COMPLETE; | |
9ba136d0 KH |
401 | list_del(&orb->link); |
402 | break; | |
403 | } | |
404 | } | |
405 | spin_unlock_irqrestore(&card->lock, flags); | |
406 | ||
5a3c2be6 | 407 | if (&orb->link != &lu->orb_list) |
9ba136d0 KH |
408 | orb->callback(orb, &status); |
409 | else | |
410 | fw_error("status write for unknown orb\n"); | |
411 | ||
e57d2011 KH |
412 | kref_put(&orb->kref, free_orb); |
413 | ||
9ba136d0 KH |
414 | fw_send_response(card, request, RCODE_COMPLETE); |
415 | } | |
416 | ||
417 | static void | |
418 | complete_transaction(struct fw_card *card, int rcode, | |
419 | void *payload, size_t length, void *data) | |
420 | { | |
421 | struct sbp2_orb *orb = data; | |
422 | unsigned long flags; | |
423 | ||
e57d2011 KH |
424 | /* |
425 | * This is a little tricky. We can get the status write for | |
426 | * the orb before we get this callback. The status write | |
427 | * handler above will assume the orb pointer transaction was | |
428 | * successful and set the rcode to RCODE_COMPLETE for the orb. | |
429 | * So this callback only sets the rcode if it hasn't already | |
430 | * been set and only does the cleanup if the transaction | |
431 | * failed and we didn't already get a status write. | |
432 | */ | |
433 | spin_lock_irqsave(&card->lock, flags); | |
434 | ||
435 | if (orb->rcode == -1) | |
436 | orb->rcode = rcode; | |
437 | if (orb->rcode != RCODE_COMPLETE) { | |
9ba136d0 | 438 | list_del(&orb->link); |
1b34e974 | 439 | spin_unlock_irqrestore(&card->lock, flags); |
9ba136d0 | 440 | orb->callback(orb, NULL); |
1b34e974 SR |
441 | } else { |
442 | spin_unlock_irqrestore(&card->lock, flags); | |
9ba136d0 | 443 | } |
e57d2011 | 444 | |
e57d2011 | 445 | kref_put(&orb->kref, free_orb); |
9ba136d0 KH |
446 | } |
447 | ||
448 | static void | |
5a3c2be6 | 449 | sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, |
9ba136d0 KH |
450 | int node_id, int generation, u64 offset) |
451 | { | |
5a3c2be6 | 452 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 KH |
453 | unsigned long flags; |
454 | ||
455 | orb->pointer.high = 0; | |
71ee9f01 | 456 | orb->pointer.low = cpu_to_be32(orb->request_bus); |
9ba136d0 KH |
457 | |
458 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 459 | list_add_tail(&orb->link, &lu->orb_list); |
9ba136d0 KH |
460 | spin_unlock_irqrestore(&device->card->lock, flags); |
461 | ||
e57d2011 KH |
462 | /* Take a ref for the orb list and for the transaction callback. */ |
463 | kref_get(&orb->kref); | |
464 | kref_get(&orb->kref); | |
465 | ||
9ba136d0 | 466 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
f1397490 | 467 | node_id, generation, device->max_speed, offset, |
2d826cc5 | 468 | &orb->pointer, sizeof(orb->pointer), |
9ba136d0 KH |
469 | complete_transaction, orb); |
470 | } | |
471 | ||
5a3c2be6 | 472 | static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |
9ba136d0 | 473 | { |
5a3c2be6 | 474 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 KH |
475 | struct sbp2_orb *orb, *next; |
476 | struct list_head list; | |
477 | unsigned long flags; | |
2aaad97b | 478 | int retval = -ENOENT; |
9ba136d0 KH |
479 | |
480 | INIT_LIST_HEAD(&list); | |
481 | spin_lock_irqsave(&device->card->lock, flags); | |
5a3c2be6 | 482 | list_splice_init(&lu->orb_list, &list); |
9ba136d0 KH |
483 | spin_unlock_irqrestore(&device->card->lock, flags); |
484 | ||
485 | list_for_each_entry_safe(orb, next, &list, link) { | |
2aaad97b | 486 | retval = 0; |
730c32f5 KH |
487 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
488 | continue; | |
489 | ||
9ba136d0 KH |
490 | orb->rcode = RCODE_CANCELLED; |
491 | orb->callback(orb, NULL); | |
492 | } | |
9ba136d0 | 493 | |
2aaad97b | 494 | return retval; |
1d3d52c5 KH |
495 | } |
496 | ||
9ba136d0 KH |
497 | static void |
498 | complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
499 | { | |
500 | struct sbp2_management_orb *orb = | |
6f061487 | 501 | container_of(base_orb, struct sbp2_management_orb, base); |
9ba136d0 KH |
502 | |
503 | if (status) | |
2d826cc5 | 504 | memcpy(&orb->status, status, sizeof(*status)); |
9ba136d0 KH |
505 | complete(&orb->done); |
506 | } | |
507 | ||
508 | static int | |
5a3c2be6 SR |
509 | sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id, |
510 | int generation, int function, int lun_or_login_id, | |
511 | void *response) | |
9ba136d0 | 512 | { |
5a3c2be6 | 513 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 | 514 | struct sbp2_management_orb *orb; |
a4c379c1 | 515 | unsigned int timeout; |
9ba136d0 KH |
516 | int retval = -ENOMEM; |
517 | ||
be6f48b0 SR |
518 | if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device)) |
519 | return 0; | |
520 | ||
2d826cc5 | 521 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
522 | if (orb == NULL) |
523 | return -ENOMEM; | |
524 | ||
e57d2011 | 525 | kref_init(&orb->base.kref); |
9ba136d0 KH |
526 | orb->response_bus = |
527 | dma_map_single(device->card->device, &orb->response, | |
2d826cc5 | 528 | sizeof(orb->response), DMA_FROM_DEVICE); |
82eff9db | 529 | if (dma_mapping_error(orb->response_bus)) |
7aa48481 | 530 | goto fail_mapping_response; |
9ba136d0 | 531 | |
71ee9f01 SR |
532 | orb->request.response.high = 0; |
533 | orb->request.response.low = cpu_to_be32(orb->response_bus); | |
9ba136d0 | 534 | |
71ee9f01 | 535 | orb->request.misc = cpu_to_be32( |
a77754a7 KH |
536 | MANAGEMENT_ORB_NOTIFY | |
537 | MANAGEMENT_ORB_FUNCTION(function) | | |
71ee9f01 SR |
538 | MANAGEMENT_ORB_LUN(lun_or_login_id)); |
539 | orb->request.length = cpu_to_be32( | |
540 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response))); | |
9ba136d0 | 541 | |
71ee9f01 SR |
542 | orb->request.status_fifo.high = |
543 | cpu_to_be32(lu->address_handler.offset >> 32); | |
544 | orb->request.status_fifo.low = | |
545 | cpu_to_be32(lu->address_handler.offset); | |
9ba136d0 | 546 | |
9ba136d0 | 547 | if (function == SBP2_LOGIN_REQUEST) { |
14dc992a | 548 | /* Ask for 2^2 == 4 seconds reconnect grace period */ |
71ee9f01 | 549 | orb->request.misc |= cpu_to_be32( |
14dc992a | 550 | MANAGEMENT_ORB_RECONNECT(2) | |
71ee9f01 | 551 | MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login)); |
384170da | 552 | timeout = lu->tgt->mgt_orb_timeout; |
a4c379c1 JW |
553 | } else { |
554 | timeout = SBP2_ORB_TIMEOUT; | |
9ba136d0 KH |
555 | } |
556 | ||
9ba136d0 KH |
557 | init_completion(&orb->done); |
558 | orb->base.callback = complete_management_orb; | |
2aaad97b | 559 | |
7aa48481 SR |
560 | orb->base.request_bus = |
561 | dma_map_single(device->card->device, &orb->request, | |
562 | sizeof(orb->request), DMA_TO_DEVICE); | |
563 | if (dma_mapping_error(orb->base.request_bus)) | |
564 | goto fail_mapping_request; | |
565 | ||
5a3c2be6 SR |
566 | sbp2_send_orb(&orb->base, lu, node_id, generation, |
567 | lu->tgt->management_agent_address); | |
9ba136d0 | 568 | |
a4c379c1 | 569 | wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout)); |
9ba136d0 | 570 | |
9ba136d0 | 571 | retval = -EIO; |
5a3c2be6 | 572 | if (sbp2_cancel_orbs(lu) == 0) { |
48f18c76 SR |
573 | fw_error("%s: orb reply timed out, rcode=0x%02x\n", |
574 | lu->tgt->bus_id, orb->base.rcode); | |
9ba136d0 KH |
575 | goto out; |
576 | } | |
577 | ||
2aaad97b | 578 | if (orb->base.rcode != RCODE_COMPLETE) { |
48f18c76 SR |
579 | fw_error("%s: management write failed, rcode 0x%02x\n", |
580 | lu->tgt->bus_id, orb->base.rcode); | |
9ba136d0 KH |
581 | goto out; |
582 | } | |
583 | ||
a77754a7 KH |
584 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
585 | STATUS_GET_SBP_STATUS(orb->status) != 0) { | |
48f18c76 | 586 | fw_error("%s: error status: %d:%d\n", lu->tgt->bus_id, |
a77754a7 KH |
587 | STATUS_GET_RESPONSE(orb->status), |
588 | STATUS_GET_SBP_STATUS(orb->status)); | |
9ba136d0 KH |
589 | goto out; |
590 | } | |
591 | ||
592 | retval = 0; | |
593 | out: | |
594 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 595 | sizeof(orb->request), DMA_TO_DEVICE); |
7aa48481 | 596 | fail_mapping_request: |
9ba136d0 | 597 | dma_unmap_single(device->card->device, orb->response_bus, |
2d826cc5 | 598 | sizeof(orb->response), DMA_FROM_DEVICE); |
7aa48481 | 599 | fail_mapping_response: |
9ba136d0 | 600 | if (response) |
71ee9f01 | 601 | memcpy(response, orb->response, sizeof(orb->response)); |
e57d2011 | 602 | kref_put(&orb->base.kref, free_orb); |
9ba136d0 KH |
603 | |
604 | return retval; | |
605 | } | |
606 | ||
607 | static void | |
608 | complete_agent_reset_write(struct fw_card *card, int rcode, | |
e0e60215 | 609 | void *payload, size_t length, void *done) |
9ba136d0 | 610 | { |
e0e60215 SR |
611 | complete(done); |
612 | } | |
613 | ||
614 | static void sbp2_agent_reset(struct sbp2_logical_unit *lu) | |
615 | { | |
616 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); | |
617 | DECLARE_COMPLETION_ONSTACK(done); | |
618 | struct fw_transaction t; | |
619 | static u32 z; | |
9ba136d0 | 620 | |
e0e60215 SR |
621 | fw_send_request(device->card, &t, TCODE_WRITE_QUADLET_REQUEST, |
622 | lu->tgt->node_id, lu->generation, device->max_speed, | |
623 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
624 | &z, sizeof(z), complete_agent_reset_write, &done); | |
625 | wait_for_completion(&done); | |
9ba136d0 KH |
626 | } |
627 | ||
e0e60215 SR |
628 | static void |
629 | complete_agent_reset_write_no_wait(struct fw_card *card, int rcode, | |
630 | void *payload, size_t length, void *data) | |
631 | { | |
632 | kfree(data); | |
633 | } | |
634 | ||
635 | static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu) | |
9ba136d0 | 636 | { |
5a3c2be6 | 637 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
9ba136d0 | 638 | struct fw_transaction *t; |
e0e60215 | 639 | static u32 z; |
9ba136d0 | 640 | |
e0e60215 | 641 | t = kmalloc(sizeof(*t), GFP_ATOMIC); |
9ba136d0 | 642 | if (t == NULL) |
e0e60215 | 643 | return; |
9ba136d0 KH |
644 | |
645 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, | |
5a3c2be6 SR |
646 | lu->tgt->node_id, lu->generation, device->max_speed, |
647 | lu->command_block_agent_address + SBP2_AGENT_RESET, | |
e0e60215 | 648 | &z, sizeof(z), complete_agent_reset_write_no_wait, t); |
9ba136d0 KH |
649 | } |
650 | ||
2e2705bd SR |
651 | static void sbp2_set_generation(struct sbp2_logical_unit *lu, int generation) |
652 | { | |
653 | struct fw_card *card = fw_device(lu->tgt->unit->device.parent)->card; | |
654 | unsigned long flags; | |
655 | ||
656 | /* serialize with comparisons of lu->generation and card->generation */ | |
657 | spin_lock_irqsave(&card->lock, flags); | |
658 | lu->generation = generation; | |
659 | spin_unlock_irqrestore(&card->lock, flags); | |
660 | } | |
661 | ||
662 | static inline void sbp2_allow_block(struct sbp2_logical_unit *lu) | |
663 | { | |
664 | /* | |
665 | * We may access dont_block without taking card->lock here: | |
666 | * All callers of sbp2_allow_block() and all callers of sbp2_unblock() | |
667 | * are currently serialized against each other. | |
668 | * And a wrong result in sbp2_conditionally_block()'s access of | |
669 | * dont_block is rather harmless, it simply misses its first chance. | |
670 | */ | |
671 | --lu->tgt->dont_block; | |
672 | } | |
673 | ||
674 | /* | |
675 | * Blocks lu->tgt if all of the following conditions are met: | |
676 | * - Login, INQUIRY, and high-level SCSI setup of all of the target's | |
677 | * logical units have been finished (indicated by dont_block == 0). | |
678 | * - lu->generation is stale. | |
679 | * | |
680 | * Note, scsi_block_requests() must be called while holding card->lock, | |
681 | * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to | |
682 | * unblock the target. | |
683 | */ | |
684 | static void sbp2_conditionally_block(struct sbp2_logical_unit *lu) | |
685 | { | |
686 | struct sbp2_target *tgt = lu->tgt; | |
687 | struct fw_card *card = fw_device(tgt->unit->device.parent)->card; | |
688 | struct Scsi_Host *shost = | |
689 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
690 | unsigned long flags; | |
691 | ||
692 | spin_lock_irqsave(&card->lock, flags); | |
693 | if (!tgt->dont_block && !lu->blocked && | |
694 | lu->generation != card->generation) { | |
695 | lu->blocked = true; | |
696 | if (++tgt->blocked == 1) { | |
697 | scsi_block_requests(shost); | |
698 | fw_notify("blocked %s\n", lu->tgt->bus_id); | |
699 | } | |
700 | } | |
701 | spin_unlock_irqrestore(&card->lock, flags); | |
702 | } | |
703 | ||
704 | /* | |
705 | * Unblocks lu->tgt as soon as all its logical units can be unblocked. | |
706 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
707 | * card->lock protected section. On the other hand, running it inside | |
708 | * the section might clash with shost->host_lock. | |
709 | */ | |
710 | static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu) | |
711 | { | |
712 | struct sbp2_target *tgt = lu->tgt; | |
713 | struct fw_card *card = fw_device(tgt->unit->device.parent)->card; | |
714 | struct Scsi_Host *shost = | |
715 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
716 | unsigned long flags; | |
717 | bool unblock = false; | |
718 | ||
719 | spin_lock_irqsave(&card->lock, flags); | |
720 | if (lu->blocked && lu->generation == card->generation) { | |
721 | lu->blocked = false; | |
722 | unblock = --tgt->blocked == 0; | |
723 | } | |
724 | spin_unlock_irqrestore(&card->lock, flags); | |
725 | ||
726 | if (unblock) { | |
727 | scsi_unblock_requests(shost); | |
728 | fw_notify("unblocked %s\n", lu->tgt->bus_id); | |
729 | } | |
730 | } | |
731 | ||
732 | /* | |
733 | * Prevents future blocking of tgt and unblocks it. | |
734 | * Note, it is harmless to run scsi_unblock_requests() outside the | |
735 | * card->lock protected section. On the other hand, running it inside | |
736 | * the section might clash with shost->host_lock. | |
737 | */ | |
738 | static void sbp2_unblock(struct sbp2_target *tgt) | |
739 | { | |
740 | struct fw_card *card = fw_device(tgt->unit->device.parent)->card; | |
741 | struct Scsi_Host *shost = | |
742 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
743 | unsigned long flags; | |
744 | ||
745 | spin_lock_irqsave(&card->lock, flags); | |
746 | ++tgt->dont_block; | |
747 | spin_unlock_irqrestore(&card->lock, flags); | |
748 | ||
749 | scsi_unblock_requests(shost); | |
750 | } | |
751 | ||
f8436158 SR |
752 | static int sbp2_lun2int(u16 lun) |
753 | { | |
754 | struct scsi_lun eight_bytes_lun; | |
755 | ||
756 | memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); | |
757 | eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff; | |
758 | eight_bytes_lun.scsi_lun[1] = lun & 0xff; | |
759 | ||
760 | return scsilun_to_int(&eight_bytes_lun); | |
761 | } | |
762 | ||
5a3c2be6 | 763 | static void sbp2_release_target(struct kref *kref) |
b3d6e151 | 764 | { |
5a3c2be6 SR |
765 | struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref); |
766 | struct sbp2_logical_unit *lu, *next; | |
767 | struct Scsi_Host *shost = | |
768 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); | |
f8436158 | 769 | struct scsi_device *sdev; |
855c603d | 770 | struct fw_device *device = fw_device(tgt->unit->device.parent); |
5a3c2be6 | 771 | |
2e2705bd SR |
772 | /* prevent deadlocks */ |
773 | sbp2_unblock(tgt); | |
774 | ||
5a3c2be6 | 775 | list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { |
f8436158 SR |
776 | sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun)); |
777 | if (sdev) { | |
778 | scsi_remove_device(sdev); | |
779 | scsi_device_put(sdev); | |
33f1c6c3 | 780 | } |
be6f48b0 SR |
781 | sbp2_send_management_orb(lu, tgt->node_id, lu->generation, |
782 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
4dccd020 | 783 | |
5a3c2be6 SR |
784 | fw_core_remove_address_handler(&lu->address_handler); |
785 | list_del(&lu->link); | |
786 | kfree(lu); | |
787 | } | |
788 | scsi_remove_host(shost); | |
48f18c76 | 789 | fw_notify("released %s\n", tgt->bus_id); |
5a3c2be6 | 790 | |
1dc3bea7 | 791 | fw_unit_put(tgt->unit); |
5a3c2be6 | 792 | scsi_host_put(shost); |
855c603d | 793 | fw_device_put(device); |
b3d6e151 KH |
794 | } |
795 | ||
df8ec249 SR |
796 | static struct workqueue_struct *sbp2_wq; |
797 | ||
285838eb SR |
798 | /* |
799 | * Always get the target's kref when scheduling work on one its units. | |
800 | * Each workqueue job is responsible to call sbp2_target_put() upon return. | |
801 | */ | |
802 | static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay) | |
803 | { | |
804 | if (queue_delayed_work(sbp2_wq, &lu->work, delay)) | |
805 | kref_get(&lu->tgt->kref); | |
806 | } | |
807 | ||
808 | static void sbp2_target_put(struct sbp2_target *tgt) | |
809 | { | |
810 | kref_put(&tgt->kref, sbp2_release_target); | |
811 | } | |
812 | ||
51f9dbef JW |
813 | static void |
814 | complete_set_busy_timeout(struct fw_card *card, int rcode, | |
815 | void *payload, size_t length, void *done) | |
816 | { | |
817 | complete(done); | |
818 | } | |
819 | ||
820 | static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu) | |
821 | { | |
822 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); | |
823 | DECLARE_COMPLETION_ONSTACK(done); | |
824 | struct fw_transaction t; | |
825 | static __be32 busy_timeout; | |
826 | ||
827 | /* FIXME: we should try to set dual-phase cycle_limit too */ | |
828 | busy_timeout = cpu_to_be32(SBP2_RETRY_LIMIT); | |
829 | ||
830 | fw_send_request(device->card, &t, TCODE_WRITE_QUADLET_REQUEST, | |
831 | lu->tgt->node_id, lu->generation, device->max_speed, | |
832 | CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT, &busy_timeout, | |
833 | sizeof(busy_timeout), complete_set_busy_timeout, &done); | |
834 | wait_for_completion(&done); | |
835 | } | |
836 | ||
5a3c2be6 SR |
837 | static void sbp2_reconnect(struct work_struct *work); |
838 | ||
7f37c426 KH |
839 | static void sbp2_login(struct work_struct *work) |
840 | { | |
5a3c2be6 SR |
841 | struct sbp2_logical_unit *lu = |
842 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 SR |
843 | struct sbp2_target *tgt = lu->tgt; |
844 | struct fw_device *device = fw_device(tgt->unit->device.parent); | |
845 | struct Scsi_Host *shost; | |
5a3c2be6 | 846 | struct scsi_device *sdev; |
7f37c426 | 847 | struct sbp2_login_response response; |
5a3c2be6 | 848 | int generation, node_id, local_node_id; |
7f37c426 | 849 | |
be6f48b0 SR |
850 | if (fw_device_is_shutdown(device)) |
851 | goto out; | |
852 | ||
5a8a1bcd | 853 | generation = device->generation; |
b5d2a5e0 | 854 | smp_rmb(); /* node_id must not be older than generation */ |
5a8a1bcd SR |
855 | node_id = device->node_id; |
856 | local_node_id = device->card->node_id; | |
7f37c426 | 857 | |
ce896d95 | 858 | /* If this is a re-login attempt, log out, or we might be rejected. */ |
f8436158 | 859 | if (lu->has_sdev) |
ce896d95 SR |
860 | sbp2_send_management_orb(lu, device->node_id, generation, |
861 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
862 | ||
5a3c2be6 SR |
863 | if (sbp2_send_management_orb(lu, node_id, generation, |
864 | SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { | |
2e2705bd | 865 | if (lu->retries++ < 5) { |
285838eb | 866 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
2e2705bd | 867 | } else { |
48f18c76 SR |
868 | fw_error("%s: failed to login to LUN %04x\n", |
869 | tgt->bus_id, lu->lun); | |
2e2705bd SR |
870 | /* Let any waiting I/O fail from now on. */ |
871 | sbp2_unblock(lu->tgt); | |
872 | } | |
285838eb | 873 | goto out; |
7f37c426 KH |
874 | } |
875 | ||
48f18c76 SR |
876 | tgt->node_id = node_id; |
877 | tgt->address_high = local_node_id << 16; | |
2e2705bd | 878 | sbp2_set_generation(lu, generation); |
7f37c426 | 879 | |
5a3c2be6 | 880 | lu->command_block_agent_address = |
71ee9f01 SR |
881 | ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff) |
882 | << 32) | be32_to_cpu(response.command_block_agent.low); | |
883 | lu->login_id = be32_to_cpu(response.misc) & 0xffff; | |
7f37c426 | 884 | |
48f18c76 SR |
885 | fw_notify("%s: logged in to LUN %04x (%d retries)\n", |
886 | tgt->bus_id, lu->lun, lu->retries); | |
7f37c426 | 887 | |
51f9dbef JW |
888 | /* set appropriate retry limit(s) in BUSY_TIMEOUT register */ |
889 | sbp2_set_busy_timeout(lu); | |
7f37c426 | 890 | |
5a3c2be6 SR |
891 | PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect); |
892 | sbp2_agent_reset(lu); | |
893 | ||
0fa6dfdb | 894 | /* This was a re-login. */ |
f8436158 | 895 | if (lu->has_sdev) { |
0fa6dfdb | 896 | sbp2_cancel_orbs(lu); |
2e2705bd | 897 | sbp2_conditionally_unblock(lu); |
0fa6dfdb SR |
898 | goto out; |
899 | } | |
900 | ||
9220f194 SR |
901 | if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) |
902 | ssleep(SBP2_INQUIRY_DELAY); | |
903 | ||
48f18c76 | 904 | shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
f8436158 | 905 | sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu); |
e80de370 SR |
906 | /* |
907 | * FIXME: We are unable to perform reconnects while in sbp2_login(). | |
908 | * Therefore __scsi_add_device() will get into trouble if a bus reset | |
909 | * happens in parallel. It will either fail or leave us with an | |
910 | * unusable sdev. As a workaround we check for this and retry the | |
911 | * whole login and SCSI probing. | |
912 | */ | |
1b9c12ba | 913 | |
e80de370 SR |
914 | /* Reported error during __scsi_add_device() */ |
915 | if (IS_ERR(sdev)) | |
916 | goto out_logout_login; | |
917 | ||
e80de370 SR |
918 | /* Unreported error during __scsi_add_device() */ |
919 | smp_rmb(); /* get current card generation */ | |
920 | if (generation != device->card->generation) { | |
921 | scsi_remove_device(sdev); | |
33f1c6c3 | 922 | scsi_device_put(sdev); |
e80de370 | 923 | goto out_logout_login; |
7f37c426 | 924 | } |
e80de370 SR |
925 | |
926 | /* No error during __scsi_add_device() */ | |
f8436158 SR |
927 | lu->has_sdev = true; |
928 | scsi_device_put(sdev); | |
2e2705bd | 929 | sbp2_allow_block(lu); |
e80de370 SR |
930 | goto out; |
931 | ||
932 | out_logout_login: | |
933 | smp_rmb(); /* generation may have changed */ | |
934 | generation = device->generation; | |
935 | smp_rmb(); /* node_id must not be older than generation */ | |
936 | ||
937 | sbp2_send_management_orb(lu, device->node_id, generation, | |
938 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); | |
939 | /* | |
940 | * If a bus reset happened, sbp2_update will have requeued | |
941 | * lu->work already. Reset the work from reconnect to login. | |
942 | */ | |
943 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); | |
285838eb | 944 | out: |
48f18c76 | 945 | sbp2_target_put(tgt); |
7f37c426 | 946 | } |
9ba136d0 | 947 | |
5a3c2be6 | 948 | static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) |
9ba136d0 | 949 | { |
5a3c2be6 | 950 | struct sbp2_logical_unit *lu; |
9ba136d0 | 951 | |
5a3c2be6 SR |
952 | lu = kmalloc(sizeof(*lu), GFP_KERNEL); |
953 | if (!lu) | |
954 | return -ENOMEM; | |
9ba136d0 | 955 | |
5a3c2be6 SR |
956 | lu->address_handler.length = 0x100; |
957 | lu->address_handler.address_callback = sbp2_status_write; | |
958 | lu->address_handler.callback_data = lu; | |
9ba136d0 | 959 | |
5a3c2be6 SR |
960 | if (fw_core_add_address_handler(&lu->address_handler, |
961 | &fw_high_memory_region) < 0) { | |
962 | kfree(lu); | |
963 | return -ENOMEM; | |
964 | } | |
9ba136d0 | 965 | |
f8436158 SR |
966 | lu->tgt = tgt; |
967 | lu->lun = lun_entry & 0xffff; | |
968 | lu->retries = 0; | |
969 | lu->has_sdev = false; | |
970 | lu->blocked = false; | |
2e2705bd | 971 | ++tgt->dont_block; |
5a3c2be6 SR |
972 | INIT_LIST_HEAD(&lu->orb_list); |
973 | INIT_DELAYED_WORK(&lu->work, sbp2_login); | |
9ba136d0 | 974 | |
5a3c2be6 SR |
975 | list_add_tail(&lu->link, &tgt->lu_list); |
976 | return 0; | |
977 | } | |
ad85274f | 978 | |
5a3c2be6 SR |
979 | static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory) |
980 | { | |
981 | struct fw_csr_iterator ci; | |
982 | int key, value; | |
9ba136d0 | 983 | |
5a3c2be6 SR |
984 | fw_csr_iterator_init(&ci, directory); |
985 | while (fw_csr_iterator_next(&ci, &key, &value)) | |
986 | if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && | |
987 | sbp2_add_logical_unit(tgt, value) < 0) | |
988 | return -ENOMEM; | |
989 | return 0; | |
990 | } | |
991 | ||
992 | static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory, | |
993 | u32 *model, u32 *firmware_revision) | |
994 | { | |
995 | struct fw_csr_iterator ci; | |
996 | int key, value; | |
384170da | 997 | unsigned int timeout; |
5a3c2be6 SR |
998 | |
999 | fw_csr_iterator_init(&ci, directory); | |
9ba136d0 KH |
1000 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
1001 | switch (key) { | |
5a3c2be6 | 1002 | |
9ba136d0 | 1003 | case CSR_DEPENDENT_INFO | CSR_OFFSET: |
5a3c2be6 SR |
1004 | tgt->management_agent_address = |
1005 | CSR_REGISTER_BASE + 4 * value; | |
9ba136d0 | 1006 | break; |
5a3c2be6 SR |
1007 | |
1008 | case CSR_DIRECTORY_ID: | |
1009 | tgt->directory_id = value; | |
9ba136d0 | 1010 | break; |
5a3c2be6 | 1011 | |
9ba136d0 | 1012 | case CSR_MODEL: |
5a3c2be6 SR |
1013 | *model = value; |
1014 | break; | |
1015 | ||
1016 | case SBP2_CSR_FIRMWARE_REVISION: | |
1017 | *firmware_revision = value; | |
1018 | break; | |
1019 | ||
384170da JW |
1020 | case SBP2_CSR_UNIT_CHARACTERISTICS: |
1021 | /* the timeout value is stored in 500ms units */ | |
1022 | timeout = ((unsigned int) value >> 8 & 0xff) * 500; | |
1023 | timeout = max(timeout, SBP2_MIN_LOGIN_ORB_TIMEOUT); | |
1024 | tgt->mgt_orb_timeout = | |
1025 | min(timeout, SBP2_MAX_LOGIN_ORB_TIMEOUT); | |
1026 | ||
1027 | if (timeout > tgt->mgt_orb_timeout) | |
1028 | fw_notify("%s: config rom contains %ds " | |
1029 | "management ORB timeout, limiting " | |
48f18c76 | 1030 | "to %ds\n", tgt->bus_id, |
384170da JW |
1031 | timeout / 1000, |
1032 | tgt->mgt_orb_timeout / 1000); | |
1033 | break; | |
1034 | ||
5a3c2be6 SR |
1035 | case SBP2_CSR_LOGICAL_UNIT_NUMBER: |
1036 | if (sbp2_add_logical_unit(tgt, value) < 0) | |
1037 | return -ENOMEM; | |
1038 | break; | |
1039 | ||
1040 | case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: | |
1041 | if (sbp2_scan_logical_unit_dir(tgt, ci.p + value) < 0) | |
1042 | return -ENOMEM; | |
9ba136d0 KH |
1043 | break; |
1044 | } | |
1045 | } | |
5a3c2be6 SR |
1046 | return 0; |
1047 | } | |
1048 | ||
1049 | static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, | |
1050 | u32 firmware_revision) | |
1051 | { | |
1052 | int i; | |
05cca738 | 1053 | unsigned int w = sbp2_param_workarounds; |
2df222b8 SR |
1054 | |
1055 | if (w) | |
1056 | fw_notify("Please notify linux1394-devel@lists.sourceforge.net " | |
1057 | "if you need the workarounds parameter for %s\n", | |
48f18c76 | 1058 | tgt->bus_id); |
5a3c2be6 | 1059 | |
2df222b8 SR |
1060 | if (w & SBP2_WORKAROUND_OVERRIDE) |
1061 | goto out; | |
9ba136d0 KH |
1062 | |
1063 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
5a3c2be6 | 1064 | |
9ba136d0 KH |
1065 | if (sbp2_workarounds_table[i].firmware_revision != |
1066 | (firmware_revision & 0xffffff00)) | |
1067 | continue; | |
5a3c2be6 | 1068 | |
9ba136d0 KH |
1069 | if (sbp2_workarounds_table[i].model != model && |
1070 | sbp2_workarounds_table[i].model != ~0) | |
1071 | continue; | |
5a3c2be6 | 1072 | |
2df222b8 | 1073 | w |= sbp2_workarounds_table[i].workarounds; |
9ba136d0 KH |
1074 | break; |
1075 | } | |
2df222b8 SR |
1076 | out: |
1077 | if (w) | |
5a3c2be6 | 1078 | fw_notify("Workarounds for %s: 0x%x " |
9ba136d0 | 1079 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", |
48f18c76 | 1080 | tgt->bus_id, w, firmware_revision, model); |
2df222b8 | 1081 | tgt->workarounds = w; |
5a3c2be6 SR |
1082 | } |
1083 | ||
1084 | static struct scsi_host_template scsi_driver_template; | |
1085 | ||
1086 | static int sbp2_probe(struct device *dev) | |
1087 | { | |
1088 | struct fw_unit *unit = fw_unit(dev); | |
1089 | struct fw_device *device = fw_device(unit->device.parent); | |
1090 | struct sbp2_target *tgt; | |
1091 | struct sbp2_logical_unit *lu; | |
1092 | struct Scsi_Host *shost; | |
1093 | u32 model, firmware_revision; | |
1094 | ||
1095 | shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); | |
1096 | if (shost == NULL) | |
1097 | return -ENOMEM; | |
1098 | ||
1099 | tgt = (struct sbp2_target *)shost->hostdata; | |
1100 | unit->device.driver_data = tgt; | |
1101 | tgt->unit = unit; | |
1102 | kref_init(&tgt->kref); | |
1103 | INIT_LIST_HEAD(&tgt->lu_list); | |
48f18c76 | 1104 | tgt->bus_id = unit->device.bus_id; |
5a3c2be6 SR |
1105 | |
1106 | if (fw_device_enable_phys_dma(device) < 0) | |
1107 | goto fail_shost_put; | |
1108 | ||
1109 | if (scsi_add_host(shost, &unit->device) < 0) | |
1110 | goto fail_shost_put; | |
1111 | ||
855c603d | 1112 | fw_device_get(device); |
1dc3bea7 | 1113 | fw_unit_get(unit); |
855c603d | 1114 | |
5a3c2be6 SR |
1115 | /* Initialize to values that won't match anything in our table. */ |
1116 | firmware_revision = 0xff000000; | |
1117 | model = 0xff000000; | |
1118 | ||
1119 | /* implicit directory ID */ | |
1120 | tgt->directory_id = ((unit->directory - device->config_rom) * 4 | |
1121 | + CSR_CONFIG_ROM) & 0xffffff; | |
1122 | ||
1123 | if (sbp2_scan_unit_dir(tgt, unit->directory, &model, | |
1124 | &firmware_revision) < 0) | |
1125 | goto fail_tgt_put; | |
1126 | ||
1127 | sbp2_init_workarounds(tgt, model, firmware_revision); | |
9ba136d0 | 1128 | |
285838eb | 1129 | /* Do the login in a workqueue so we can easily reschedule retries. */ |
5a3c2be6 | 1130 | list_for_each_entry(lu, &tgt->lu_list, link) |
285838eb | 1131 | sbp2_queue_work(lu, 0); |
9ba136d0 | 1132 | return 0; |
ad85274f | 1133 | |
5a3c2be6 | 1134 | fail_tgt_put: |
285838eb | 1135 | sbp2_target_put(tgt); |
5a3c2be6 SR |
1136 | return -ENOMEM; |
1137 | ||
1138 | fail_shost_put: | |
1139 | scsi_host_put(shost); | |
1140 | return -ENOMEM; | |
9ba136d0 KH |
1141 | } |
1142 | ||
1143 | static int sbp2_remove(struct device *dev) | |
1144 | { | |
1145 | struct fw_unit *unit = fw_unit(dev); | |
5a3c2be6 | 1146 | struct sbp2_target *tgt = unit->device.driver_data; |
9ba136d0 | 1147 | |
285838eb | 1148 | sbp2_target_put(tgt); |
9ba136d0 KH |
1149 | return 0; |
1150 | } | |
1151 | ||
1152 | static void sbp2_reconnect(struct work_struct *work) | |
1153 | { | |
5a3c2be6 SR |
1154 | struct sbp2_logical_unit *lu = |
1155 | container_of(work, struct sbp2_logical_unit, work.work); | |
48f18c76 SR |
1156 | struct sbp2_target *tgt = lu->tgt; |
1157 | struct fw_device *device = fw_device(tgt->unit->device.parent); | |
9ba136d0 KH |
1158 | int generation, node_id, local_node_id; |
1159 | ||
be6f48b0 SR |
1160 | if (fw_device_is_shutdown(device)) |
1161 | goto out; | |
1162 | ||
5a8a1bcd | 1163 | generation = device->generation; |
b5d2a5e0 | 1164 | smp_rmb(); /* node_id must not be older than generation */ |
5a8a1bcd SR |
1165 | node_id = device->node_id; |
1166 | local_node_id = device->card->node_id; | |
9ba136d0 | 1167 | |
5a3c2be6 | 1168 | if (sbp2_send_management_orb(lu, node_id, generation, |
7f37c426 | 1169 | SBP2_RECONNECT_REQUEST, |
5a3c2be6 | 1170 | lu->login_id, NULL) < 0) { |
ce896d95 SR |
1171 | /* |
1172 | * If reconnect was impossible even though we are in the | |
1173 | * current generation, fall back and try to log in again. | |
1174 | * | |
1175 | * We could check for "Function rejected" status, but | |
1176 | * looking at the bus generation as simpler and more general. | |
1177 | */ | |
1178 | smp_rmb(); /* get current card generation */ | |
1179 | if (generation == device->card->generation || | |
1180 | lu->retries++ >= 5) { | |
48f18c76 | 1181 | fw_error("%s: failed to reconnect\n", tgt->bus_id); |
5a3c2be6 SR |
1182 | lu->retries = 0; |
1183 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); | |
7f37c426 | 1184 | } |
285838eb SR |
1185 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
1186 | goto out; | |
7f37c426 | 1187 | } |
9ba136d0 | 1188 | |
48f18c76 SR |
1189 | tgt->node_id = node_id; |
1190 | tgt->address_high = local_node_id << 16; | |
2e2705bd | 1191 | sbp2_set_generation(lu, generation); |
7f37c426 | 1192 | |
48f18c76 SR |
1193 | fw_notify("%s: reconnected to LUN %04x (%d retries)\n", |
1194 | tgt->bus_id, lu->lun, lu->retries); | |
5a3c2be6 SR |
1195 | |
1196 | sbp2_agent_reset(lu); | |
1197 | sbp2_cancel_orbs(lu); | |
2e2705bd | 1198 | sbp2_conditionally_unblock(lu); |
285838eb | 1199 | out: |
48f18c76 | 1200 | sbp2_target_put(tgt); |
9ba136d0 KH |
1201 | } |
1202 | ||
1203 | static void sbp2_update(struct fw_unit *unit) | |
1204 | { | |
5a3c2be6 SR |
1205 | struct sbp2_target *tgt = unit->device.driver_data; |
1206 | struct sbp2_logical_unit *lu; | |
9ba136d0 | 1207 | |
5a3c2be6 SR |
1208 | fw_device_enable_phys_dma(fw_device(unit->device.parent)); |
1209 | ||
1210 | /* | |
1211 | * Fw-core serializes sbp2_update() against sbp2_remove(). | |
1212 | * Iteration over tgt->lu_list is therefore safe here. | |
1213 | */ | |
1214 | list_for_each_entry(lu, &tgt->lu_list, link) { | |
2e2705bd | 1215 | sbp2_conditionally_block(lu); |
5a3c2be6 | 1216 | lu->retries = 0; |
285838eb | 1217 | sbp2_queue_work(lu, 0); |
5a3c2be6 | 1218 | } |
9ba136d0 KH |
1219 | } |
1220 | ||
1221 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e | |
1222 | #define SBP2_SW_VERSION_ENTRY 0x00010483 | |
1223 | ||
21ebcd12 | 1224 | static const struct fw_device_id sbp2_id_table[] = { |
9ba136d0 KH |
1225 | { |
1226 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, | |
1227 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, | |
5af4e5ea | 1228 | .version = SBP2_SW_VERSION_ENTRY, |
9ba136d0 KH |
1229 | }, |
1230 | { } | |
1231 | }; | |
1232 | ||
1233 | static struct fw_driver sbp2_driver = { | |
1234 | .driver = { | |
1235 | .owner = THIS_MODULE, | |
1236 | .name = sbp2_driver_name, | |
1237 | .bus = &fw_bus_type, | |
1238 | .probe = sbp2_probe, | |
1239 | .remove = sbp2_remove, | |
1240 | }, | |
1241 | .update = sbp2_update, | |
1242 | .id_table = sbp2_id_table, | |
1243 | }; | |
1244 | ||
fbb5423c KH |
1245 | static unsigned int |
1246 | sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) | |
9ba136d0 | 1247 | { |
fbb5423c KH |
1248 | int sam_status; |
1249 | ||
9ba136d0 KH |
1250 | sense_data[0] = 0x70; |
1251 | sense_data[1] = 0x0; | |
1252 | sense_data[2] = sbp2_status[1]; | |
1253 | sense_data[3] = sbp2_status[4]; | |
1254 | sense_data[4] = sbp2_status[5]; | |
1255 | sense_data[5] = sbp2_status[6]; | |
1256 | sense_data[6] = sbp2_status[7]; | |
1257 | sense_data[7] = 10; | |
1258 | sense_data[8] = sbp2_status[8]; | |
1259 | sense_data[9] = sbp2_status[9]; | |
1260 | sense_data[10] = sbp2_status[10]; | |
1261 | sense_data[11] = sbp2_status[11]; | |
1262 | sense_data[12] = sbp2_status[2]; | |
1263 | sense_data[13] = sbp2_status[3]; | |
1264 | sense_data[14] = sbp2_status[12]; | |
1265 | sense_data[15] = sbp2_status[13]; | |
1266 | ||
fbb5423c | 1267 | sam_status = sbp2_status[0] & 0x3f; |
9ba136d0 | 1268 | |
fbb5423c KH |
1269 | switch (sam_status) { |
1270 | case SAM_STAT_GOOD: | |
9ba136d0 | 1271 | case SAM_STAT_CHECK_CONDITION: |
9ba136d0 | 1272 | case SAM_STAT_CONDITION_MET: |
fbb5423c | 1273 | case SAM_STAT_BUSY: |
9ba136d0 KH |
1274 | case SAM_STAT_RESERVATION_CONFLICT: |
1275 | case SAM_STAT_COMMAND_TERMINATED: | |
fbb5423c KH |
1276 | return DID_OK << 16 | sam_status; |
1277 | ||
9ba136d0 | 1278 | default: |
fbb5423c | 1279 | return DID_ERROR << 16; |
9ba136d0 KH |
1280 | } |
1281 | } | |
1282 | ||
1283 | static void | |
1284 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |
1285 | { | |
6f061487 JF |
1286 | struct sbp2_command_orb *orb = |
1287 | container_of(base_orb, struct sbp2_command_orb, base); | |
5a3c2be6 | 1288 | struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent); |
9ba136d0 KH |
1289 | int result; |
1290 | ||
1291 | if (status != NULL) { | |
a77754a7 | 1292 | if (STATUS_GET_DEAD(*status)) |
e0e60215 | 1293 | sbp2_agent_reset_no_wait(orb->lu); |
9ba136d0 | 1294 | |
a77754a7 | 1295 | switch (STATUS_GET_RESPONSE(*status)) { |
9ba136d0 | 1296 | case SBP2_STATUS_REQUEST_COMPLETE: |
fbb5423c | 1297 | result = DID_OK << 16; |
9ba136d0 KH |
1298 | break; |
1299 | case SBP2_STATUS_TRANSPORT_FAILURE: | |
fbb5423c | 1300 | result = DID_BUS_BUSY << 16; |
9ba136d0 KH |
1301 | break; |
1302 | case SBP2_STATUS_ILLEGAL_REQUEST: | |
1303 | case SBP2_STATUS_VENDOR_DEPENDENT: | |
1304 | default: | |
fbb5423c | 1305 | result = DID_ERROR << 16; |
9ba136d0 KH |
1306 | break; |
1307 | } | |
1308 | ||
a77754a7 KH |
1309 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
1310 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), | |
9ba136d0 KH |
1311 | orb->cmd->sense_buffer); |
1312 | } else { | |
c781c06d KH |
1313 | /* |
1314 | * If the orb completes with status == NULL, something | |
9ba136d0 | 1315 | * went wrong, typically a bus reset happened mid-orb |
c781c06d KH |
1316 | * or when sending the write (less likely). |
1317 | */ | |
fbb5423c | 1318 | result = DID_BUS_BUSY << 16; |
2e2705bd | 1319 | sbp2_conditionally_block(orb->lu); |
9ba136d0 KH |
1320 | } |
1321 | ||
1322 | dma_unmap_single(device->card->device, orb->base.request_bus, | |
2d826cc5 | 1323 | sizeof(orb->request), DMA_TO_DEVICE); |
9ba136d0 | 1324 | |
412edf65 SR |
1325 | if (scsi_sg_count(orb->cmd) > 0) |
1326 | dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd), | |
1327 | scsi_sg_count(orb->cmd), | |
9ba136d0 | 1328 | orb->cmd->sc_data_direction); |
9ba136d0 KH |
1329 | |
1330 | if (orb->page_table_bus != 0) | |
1331 | dma_unmap_single(device->card->device, orb->page_table_bus, | |
b4be016a | 1332 | sizeof(orb->page_table), DMA_TO_DEVICE); |
9ba136d0 | 1333 | |
fbb5423c | 1334 | orb->cmd->result = result; |
9ba136d0 | 1335 | orb->done(orb->cmd); |
9ba136d0 KH |
1336 | } |
1337 | ||
5a3c2be6 SR |
1338 | static int |
1339 | sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device, | |
1340 | struct sbp2_logical_unit *lu) | |
9ba136d0 | 1341 | { |
9ba136d0 KH |
1342 | struct scatterlist *sg; |
1343 | int sg_len, l, i, j, count; | |
9ba136d0 KH |
1344 | dma_addr_t sg_addr; |
1345 | ||
412edf65 SR |
1346 | sg = scsi_sglist(orb->cmd); |
1347 | count = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd), | |
9ba136d0 | 1348 | orb->cmd->sc_data_direction); |
95ffc5e3 KH |
1349 | if (count == 0) |
1350 | goto fail; | |
9ba136d0 | 1351 | |
c781c06d KH |
1352 | /* |
1353 | * Handle the special case where there is only one element in | |
9ba136d0 KH |
1354 | * the scatter list by converting it to an immediate block |
1355 | * request. This is also a workaround for broken devices such | |
1356 | * as the second generation iPod which doesn't support page | |
c781c06d KH |
1357 | * tables. |
1358 | */ | |
9ba136d0 | 1359 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { |
71ee9f01 SR |
1360 | orb->request.data_descriptor.high = |
1361 | cpu_to_be32(lu->tgt->address_high); | |
1362 | orb->request.data_descriptor.low = | |
1363 | cpu_to_be32(sg_dma_address(sg)); | |
1364 | orb->request.misc |= | |
1365 | cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg))); | |
95ffc5e3 | 1366 | return 0; |
9ba136d0 KH |
1367 | } |
1368 | ||
c781c06d KH |
1369 | /* |
1370 | * Convert the scatterlist to an sbp2 page table. If any | |
36abb3b1 KHSR |
1371 | * scatterlist entries are too big for sbp2, we split them as we |
1372 | * go. Even if we ask the block I/O layer to not give us sg | |
1373 | * elements larger than 65535 bytes, some IOMMUs may merge sg elements | |
1374 | * during DMA mapping, and Linux currently doesn't prevent this. | |
c781c06d | 1375 | */ |
b7811da2 SR |
1376 | for (i = 0, j = 0; i < count; i++, sg = sg_next(sg)) { |
1377 | sg_len = sg_dma_len(sg); | |
1378 | sg_addr = sg_dma_address(sg); | |
9ba136d0 | 1379 | while (sg_len) { |
332ef331 SR |
1380 | /* FIXME: This won't get us out of the pinch. */ |
1381 | if (unlikely(j >= ARRAY_SIZE(orb->page_table))) { | |
1382 | fw_error("page table overflow\n"); | |
1383 | goto fail_page_table; | |
1384 | } | |
9ba136d0 | 1385 | l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH); |
71ee9f01 SR |
1386 | orb->page_table[j].low = cpu_to_be32(sg_addr); |
1387 | orb->page_table[j].high = cpu_to_be32(l << 16); | |
9ba136d0 KH |
1388 | sg_addr += l; |
1389 | sg_len -= l; | |
1390 | j++; | |
1391 | } | |
1392 | } | |
1393 | ||
b4be016a SR |
1394 | orb->page_table_bus = |
1395 | dma_map_single(device->card->device, orb->page_table, | |
1396 | sizeof(orb->page_table), DMA_TO_DEVICE); | |
1397 | if (dma_mapping_error(orb->page_table_bus)) | |
1398 | goto fail_page_table; | |
9ba136d0 | 1399 | |
c781c06d KH |
1400 | /* |
1401 | * The data_descriptor pointer is the one case where we need | |
9ba136d0 KH |
1402 | * to fill in the node ID part of the address. All other |
1403 | * pointers assume that the data referenced reside on the | |
1404 | * initiator (i.e. us), but data_descriptor can refer to data | |
c781c06d KH |
1405 | * on other nodes so we need to put our ID in descriptor.high. |
1406 | */ | |
71ee9f01 SR |
1407 | orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high); |
1408 | orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus); | |
1409 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT | | |
1410 | COMMAND_ORB_DATA_SIZE(j)); | |
9ba136d0 | 1411 | |
95ffc5e3 KH |
1412 | return 0; |
1413 | ||
1414 | fail_page_table: | |
412edf65 | 1415 | dma_unmap_sg(device->card->device, sg, scsi_sg_count(orb->cmd), |
95ffc5e3 KH |
1416 | orb->cmd->sc_data_direction); |
1417 | fail: | |
1418 | return -ENOMEM; | |
9ba136d0 KH |
1419 | } |
1420 | ||
9ba136d0 KH |
1421 | /* SCSI stack integration */ |
1422 | ||
1423 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |
1424 | { | |
5a3c2be6 SR |
1425 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
1426 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); | |
9ba136d0 | 1427 | struct sbp2_command_orb *orb; |
05cca738 | 1428 | unsigned int max_payload; |
5a3c2be6 | 1429 | int retval = SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 | 1430 | |
c781c06d KH |
1431 | /* |
1432 | * Bidirectional commands are not yet implemented, and unknown | |
1433 | * transfer direction not handled. | |
1434 | */ | |
9ba136d0 | 1435 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
8a8cea27 | 1436 | fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n"); |
e1b68c4d KH |
1437 | cmd->result = DID_ERROR << 16; |
1438 | done(cmd); | |
1439 | return 0; | |
9ba136d0 KH |
1440 | } |
1441 | ||
2d826cc5 | 1442 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
9ba136d0 KH |
1443 | if (orb == NULL) { |
1444 | fw_notify("failed to alloc orb\n"); | |
5a3c2be6 | 1445 | return SCSI_MLQUEUE_HOST_BUSY; |
9ba136d0 KH |
1446 | } |
1447 | ||
12f26aa1 KH |
1448 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
1449 | orb->base.rcode = -1; | |
e57d2011 | 1450 | kref_init(&orb->base.kref); |
9ba136d0 | 1451 | |
5a3c2be6 | 1452 | orb->lu = lu; |
9ba136d0 KH |
1453 | orb->done = done; |
1454 | orb->cmd = cmd; | |
1455 | ||
71ee9f01 | 1456 | orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL); |
c781c06d KH |
1457 | /* |
1458 | * At speed 100 we can do 512 bytes per packet, at speed 200, | |
9ba136d0 KH |
1459 | * 1024 bytes per packet etc. The SBP-2 max_payload field |
1460 | * specifies the max payload size as 2 ^ (max_payload + 2), so | |
c781c06d KH |
1461 | * if we set this to max_speed + 7, we get the right value. |
1462 | */ | |
25659f71 SR |
1463 | max_payload = min(device->max_speed + 7, |
1464 | device->card->max_receive - 1); | |
71ee9f01 | 1465 | orb->request.misc = cpu_to_be32( |
25659f71 | 1466 | COMMAND_ORB_MAX_PAYLOAD(max_payload) | |
f1397490 | 1467 | COMMAND_ORB_SPEED(device->max_speed) | |
71ee9f01 | 1468 | COMMAND_ORB_NOTIFY); |
9ba136d0 KH |
1469 | |
1470 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
0d7dcbf2 | 1471 | orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION); |
9ba136d0 | 1472 | |
5a3c2be6 SR |
1473 | if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) |
1474 | goto out; | |
9ba136d0 | 1475 | |
9ba136d0 KH |
1476 | memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); |
1477 | ||
1478 | orb->base.callback = complete_command_orb; | |
8526392a SR |
1479 | orb->base.request_bus = |
1480 | dma_map_single(device->card->device, &orb->request, | |
1481 | sizeof(orb->request), DMA_TO_DEVICE); | |
1482 | if (dma_mapping_error(orb->base.request_bus)) | |
5a3c2be6 | 1483 | goto out; |
82eff9db | 1484 | |
5a3c2be6 SR |
1485 | sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, lu->generation, |
1486 | lu->command_block_agent_address + SBP2_ORB_POINTER); | |
1487 | retval = 0; | |
1488 | out: | |
e57d2011 | 1489 | kref_put(&orb->base.kref, free_orb); |
5a3c2be6 | 1490 | return retval; |
9ba136d0 KH |
1491 | } |
1492 | ||
cfb01381 SR |
1493 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
1494 | { | |
5a3c2be6 | 1495 | struct sbp2_logical_unit *lu = sdev->hostdata; |
cfb01381 | 1496 | |
5513c5f6 SR |
1497 | /* (Re-)Adding logical units via the SCSI stack is not supported. */ |
1498 | if (!lu) | |
1499 | return -ENOSYS; | |
1500 | ||
cfb01381 SR |
1501 | sdev->allow_restart = 1; |
1502 | ||
8ac3a47c SR |
1503 | /* SBP-2 requires quadlet alignment of the data buffers. */ |
1504 | blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1); | |
465ff318 | 1505 | |
5a3c2be6 | 1506 | if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
cfb01381 | 1507 | sdev->inquiry_len = 36; |
5a3c2be6 | 1508 | |
cfb01381 SR |
1509 | return 0; |
1510 | } | |
1511 | ||
9ba136d0 KH |
1512 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
1513 | { | |
5a3c2be6 | 1514 | struct sbp2_logical_unit *lu = sdev->hostdata; |
9ba136d0 | 1515 | |
cfb01381 SR |
1516 | sdev->use_10_for_rw = 1; |
1517 | ||
1518 | if (sdev->type == TYPE_ROM) | |
1519 | sdev->use_10_for_ms = 1; | |
5a3c2be6 | 1520 | |
9ba136d0 | 1521 | if (sdev->type == TYPE_DISK && |
5a3c2be6 | 1522 | lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
9ba136d0 | 1523 | sdev->skip_ms_page_8 = 1; |
5a3c2be6 SR |
1524 | |
1525 | if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) | |
9ba136d0 | 1526 | sdev->fix_capacity = 1; |
5a3c2be6 SR |
1527 | |
1528 | if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) | |
cf47c7a2 | 1529 | blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); |
5a3c2be6 | 1530 | |
9ba136d0 KH |
1531 | return 0; |
1532 | } | |
1533 | ||
1534 | /* | |
1535 | * Called by scsi stack when something has really gone wrong. Usually | |
1536 | * called when a command has timed-out for some reason. | |
1537 | */ | |
1538 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) | |
1539 | { | |
5a3c2be6 | 1540 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
9ba136d0 | 1541 | |
48f18c76 | 1542 | fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id); |
5a3c2be6 SR |
1543 | sbp2_agent_reset(lu); |
1544 | sbp2_cancel_orbs(lu); | |
9ba136d0 KH |
1545 | |
1546 | return SUCCESS; | |
1547 | } | |
1548 | ||
14e21986 SR |
1549 | /* |
1550 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: | |
1551 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) | |
1552 | * | |
1553 | * This is the concatenation of target port identifier and logical unit | |
1554 | * identifier as per SAM-2...SAM-4 annex A. | |
1555 | */ | |
1556 | static ssize_t | |
1557 | sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, | |
1558 | char *buf) | |
1559 | { | |
1560 | struct scsi_device *sdev = to_scsi_device(dev); | |
5a3c2be6 | 1561 | struct sbp2_logical_unit *lu; |
14e21986 | 1562 | struct fw_device *device; |
14e21986 SR |
1563 | |
1564 | if (!sdev) | |
1565 | return 0; | |
14e21986 | 1566 | |
5a3c2be6 SR |
1567 | lu = sdev->hostdata; |
1568 | device = fw_device(lu->tgt->unit->device.parent); | |
14e21986 SR |
1569 | |
1570 | return sprintf(buf, "%08x%08x:%06x:%04x\n", | |
1571 | device->config_rom[3], device->config_rom[4], | |
5a3c2be6 | 1572 | lu->tgt->directory_id, lu->lun); |
14e21986 SR |
1573 | } |
1574 | ||
1575 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
1576 | ||
1577 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { | |
1578 | &dev_attr_ieee1394_id, | |
1579 | NULL | |
1580 | }; | |
1581 | ||
9ba136d0 KH |
1582 | static struct scsi_host_template scsi_driver_template = { |
1583 | .module = THIS_MODULE, | |
1584 | .name = "SBP-2 IEEE-1394", | |
b02b6bc4 | 1585 | .proc_name = sbp2_driver_name, |
9ba136d0 | 1586 | .queuecommand = sbp2_scsi_queuecommand, |
cfb01381 | 1587 | .slave_alloc = sbp2_scsi_slave_alloc, |
9ba136d0 KH |
1588 | .slave_configure = sbp2_scsi_slave_configure, |
1589 | .eh_abort_handler = sbp2_scsi_abort, | |
1590 | .this_id = -1, | |
1591 | .sg_tablesize = SG_ALL, | |
1592 | .use_clustering = ENABLE_CLUSTERING, | |
02af8e70 SR |
1593 | .cmd_per_lun = 1, |
1594 | .can_queue = 1, | |
14e21986 | 1595 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
9ba136d0 KH |
1596 | }; |
1597 | ||
9ba136d0 KH |
1598 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1599 | MODULE_DESCRIPTION("SCSI over IEEE1394"); | |
1600 | MODULE_LICENSE("GPL"); | |
1601 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
1602 | ||
1e4c7b0d OH |
1603 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
1604 | #ifndef CONFIG_IEEE1394_SBP2_MODULE | |
1605 | MODULE_ALIAS("sbp2"); | |
1606 | #endif | |
1607 | ||
9ba136d0 KH |
1608 | static int __init sbp2_init(void) |
1609 | { | |
df8ec249 SR |
1610 | sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME); |
1611 | if (!sbp2_wq) | |
1612 | return -ENOMEM; | |
1613 | ||
9ba136d0 KH |
1614 | return driver_register(&sbp2_driver.driver); |
1615 | } | |
1616 | ||
1617 | static void __exit sbp2_cleanup(void) | |
1618 | { | |
1619 | driver_unregister(&sbp2_driver.driver); | |
df8ec249 | 1620 | destroy_workqueue(sbp2_wq); |
9ba136d0 KH |
1621 | } |
1622 | ||
1623 | module_init(sbp2_init); | |
1624 | module_exit(sbp2_cleanup); |