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1da177e4 LT |
1 | /* |
2 | * Block OSM | |
3 | * | |
4 | * Copyright (C) 1999-2002 Red Hat Software | |
5 | * | |
6 | * Written by Alan Cox, Building Number Three Ltd | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * For the purpose of avoiding doubt the preferred form of the work | |
19 | * for making modifications shall be a standards compliant form such | |
20 | * gzipped tar and not one requiring a proprietary or patent encumbered | |
21 | * tool to unpack. | |
22 | * | |
23 | * Fixes/additions: | |
24 | * Steve Ralston: | |
25 | * Multiple device handling error fixes, | |
26 | * Added a queue depth. | |
27 | * Alan Cox: | |
28 | * FC920 has an rmw bug. Dont or in the end marker. | |
29 | * Removed queue walk, fixed for 64bitness. | |
30 | * Rewrote much of the code over time | |
31 | * Added indirect block lists | |
32 | * Handle 64K limits on many controllers | |
33 | * Don't use indirects on the Promise (breaks) | |
34 | * Heavily chop down the queue depths | |
35 | * Deepak Saxena: | |
36 | * Independent queues per IOP | |
37 | * Support for dynamic device creation/deletion | |
38 | * Code cleanup | |
39 | * Support for larger I/Os through merge* functions | |
40 | * (taken from DAC960 driver) | |
41 | * Boji T Kannanthanam: | |
42 | * Set the I2O Block devices to be detected in increasing | |
43 | * order of TIDs during boot. | |
44 | * Search and set the I2O block device that we boot off | |
45 | * from as the first device to be claimed (as /dev/i2o/hda) | |
46 | * Properly attach/detach I2O gendisk structure from the | |
47 | * system gendisk list. The I2O block devices now appear in | |
48 | * /proc/partitions. | |
49 | * Markus Lidel <Markus.Lidel@shadowconnect.com>: | |
50 | * Minor bugfixes for 2.6. | |
51 | */ | |
52 | ||
53 | #include <linux/module.h> | |
5a0e3ad6 | 54 | #include <linux/slab.h> |
1da177e4 | 55 | #include <linux/i2o.h> |
2a48fc0a | 56 | #include <linux/mutex.h> |
1da177e4 LT |
57 | |
58 | #include <linux/mempool.h> | |
59 | ||
60 | #include <linux/genhd.h> | |
61 | #include <linux/blkdev.h> | |
62 | #include <linux/hdreg.h> | |
63 | ||
2e1973a3 ML |
64 | #include <scsi/scsi.h> |
65 | ||
1da177e4 LT |
66 | #include "i2o_block.h" |
67 | ||
68 | #define OSM_NAME "block-osm" | |
f6ed39a6 | 69 | #define OSM_VERSION "1.325" |
1da177e4 LT |
70 | #define OSM_DESCRIPTION "I2O Block Device OSM" |
71 | ||
2a48fc0a | 72 | static DEFINE_MUTEX(i2o_block_mutex); |
1da177e4 LT |
73 | static struct i2o_driver i2o_block_driver; |
74 | ||
75 | /* global Block OSM request mempool */ | |
76 | static struct i2o_block_mempool i2o_blk_req_pool; | |
77 | ||
78 | /* Block OSM class handling definition */ | |
79 | static struct i2o_class_id i2o_block_class_id[] = { | |
80 | {I2O_CLASS_RANDOM_BLOCK_STORAGE}, | |
81 | {I2O_CLASS_END} | |
82 | }; | |
83 | ||
84 | /** | |
85 | * i2o_block_device_free - free the memory of the I2O Block device | |
86 | * @dev: I2O Block device, which should be cleaned up | |
87 | * | |
88 | * Frees the request queue, gendisk and the i2o_block_device structure. | |
89 | */ | |
90 | static void i2o_block_device_free(struct i2o_block_device *dev) | |
91 | { | |
92 | blk_cleanup_queue(dev->gd->queue); | |
93 | ||
94 | put_disk(dev->gd); | |
95 | ||
96 | kfree(dev); | |
97 | }; | |
98 | ||
99 | /** | |
100 | * i2o_block_remove - remove the I2O Block device from the system again | |
101 | * @dev: I2O Block device which should be removed | |
102 | * | |
103 | * Remove gendisk from system and free all allocated memory. | |
104 | * | |
105 | * Always returns 0. | |
106 | */ | |
107 | static int i2o_block_remove(struct device *dev) | |
108 | { | |
109 | struct i2o_device *i2o_dev = to_i2o_device(dev); | |
110 | struct i2o_block_device *i2o_blk_dev = dev_get_drvdata(dev); | |
111 | ||
f88e119c ML |
112 | osm_info("device removed (TID: %03x): %s\n", i2o_dev->lct_data.tid, |
113 | i2o_blk_dev->gd->disk_name); | |
1da177e4 LT |
114 | |
115 | i2o_event_register(i2o_dev, &i2o_block_driver, 0, 0); | |
116 | ||
117 | del_gendisk(i2o_blk_dev->gd); | |
118 | ||
119 | dev_set_drvdata(dev, NULL); | |
120 | ||
121 | i2o_device_claim_release(i2o_dev); | |
122 | ||
123 | i2o_block_device_free(i2o_blk_dev); | |
124 | ||
125 | return 0; | |
126 | }; | |
127 | ||
128 | /** | |
129 | * i2o_block_device flush - Flush all dirty data of I2O device dev | |
130 | * @dev: I2O device which should be flushed | |
131 | * | |
132 | * Flushes all dirty data on device dev. | |
133 | * | |
134 | * Returns 0 on success or negative error code on failure. | |
135 | */ | |
136 | static int i2o_block_device_flush(struct i2o_device *dev) | |
137 | { | |
a1a5ea70 | 138 | struct i2o_message *msg; |
1da177e4 | 139 | |
a1a5ea70 ML |
140 | msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET); |
141 | if (IS_ERR(msg)) | |
142 | return PTR_ERR(msg); | |
1da177e4 | 143 | |
a1a5ea70 ML |
144 | msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); |
145 | msg->u.head[1] = | |
146 | cpu_to_le32(I2O_CMD_BLOCK_CFLUSH << 24 | HOST_TID << 12 | dev-> | |
147 | lct_data.tid); | |
148 | msg->body[0] = cpu_to_le32(60 << 16); | |
1da177e4 LT |
149 | osm_debug("Flushing...\n"); |
150 | ||
a1a5ea70 | 151 | return i2o_msg_post_wait(dev->iop, msg, 60); |
1da177e4 LT |
152 | }; |
153 | ||
154 | /** | |
155 | * i2o_block_device_mount - Mount (load) the media of device dev | |
156 | * @dev: I2O device which should receive the mount request | |
157 | * @media_id: Media Identifier | |
158 | * | |
159 | * Load a media into drive. Identifier should be set to -1, because the | |
160 | * spec does not support any other value. | |
161 | * | |
162 | * Returns 0 on success or negative error code on failure. | |
163 | */ | |
164 | static int i2o_block_device_mount(struct i2o_device *dev, u32 media_id) | |
165 | { | |
a1a5ea70 ML |
166 | struct i2o_message *msg; |
167 | ||
168 | msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET); | |
169 | if (IS_ERR(msg)) | |
170 | return PTR_ERR(msg); | |
171 | ||
172 | msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); | |
173 | msg->u.head[1] = | |
174 | cpu_to_le32(I2O_CMD_BLOCK_MMOUNT << 24 | HOST_TID << 12 | dev-> | |
175 | lct_data.tid); | |
176 | msg->body[0] = cpu_to_le32(-1); | |
177 | msg->body[1] = cpu_to_le32(0x00000000); | |
1da177e4 LT |
178 | osm_debug("Mounting...\n"); |
179 | ||
a1a5ea70 | 180 | return i2o_msg_post_wait(dev->iop, msg, 2); |
1da177e4 LT |
181 | }; |
182 | ||
183 | /** | |
184 | * i2o_block_device_lock - Locks the media of device dev | |
185 | * @dev: I2O device which should receive the lock request | |
186 | * @media_id: Media Identifier | |
187 | * | |
188 | * Lock media of device dev to prevent removal. The media identifier | |
189 | * should be set to -1, because the spec does not support any other value. | |
190 | * | |
191 | * Returns 0 on success or negative error code on failure. | |
192 | */ | |
193 | static int i2o_block_device_lock(struct i2o_device *dev, u32 media_id) | |
194 | { | |
a1a5ea70 | 195 | struct i2o_message *msg; |
1da177e4 | 196 | |
a1a5ea70 | 197 | msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET); |
010904cb | 198 | if (IS_ERR(msg)) |
a1a5ea70 | 199 | return PTR_ERR(msg); |
1da177e4 | 200 | |
a1a5ea70 ML |
201 | msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); |
202 | msg->u.head[1] = | |
203 | cpu_to_le32(I2O_CMD_BLOCK_MLOCK << 24 | HOST_TID << 12 | dev-> | |
204 | lct_data.tid); | |
205 | msg->body[0] = cpu_to_le32(-1); | |
1da177e4 LT |
206 | osm_debug("Locking...\n"); |
207 | ||
a1a5ea70 | 208 | return i2o_msg_post_wait(dev->iop, msg, 2); |
1da177e4 LT |
209 | }; |
210 | ||
211 | /** | |
212 | * i2o_block_device_unlock - Unlocks the media of device dev | |
213 | * @dev: I2O device which should receive the unlocked request | |
214 | * @media_id: Media Identifier | |
215 | * | |
216 | * Unlocks the media in device dev. The media identifier should be set to | |
217 | * -1, because the spec does not support any other value. | |
218 | * | |
219 | * Returns 0 on success or negative error code on failure. | |
220 | */ | |
221 | static int i2o_block_device_unlock(struct i2o_device *dev, u32 media_id) | |
222 | { | |
a1a5ea70 | 223 | struct i2o_message *msg; |
1da177e4 | 224 | |
a1a5ea70 ML |
225 | msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET); |
226 | if (IS_ERR(msg)) | |
227 | return PTR_ERR(msg); | |
1da177e4 | 228 | |
a1a5ea70 ML |
229 | msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); |
230 | msg->u.head[1] = | |
231 | cpu_to_le32(I2O_CMD_BLOCK_MUNLOCK << 24 | HOST_TID << 12 | dev-> | |
232 | lct_data.tid); | |
233 | msg->body[0] = cpu_to_le32(media_id); | |
1da177e4 LT |
234 | osm_debug("Unlocking...\n"); |
235 | ||
a1a5ea70 | 236 | return i2o_msg_post_wait(dev->iop, msg, 2); |
1da177e4 LT |
237 | }; |
238 | ||
239 | /** | |
240 | * i2o_block_device_power - Power management for device dev | |
241 | * @dev: I2O device which should receive the power management request | |
d9489fb6 | 242 | * @op: Operation to send |
1da177e4 LT |
243 | * |
244 | * Send a power management request to the device dev. | |
245 | * | |
246 | * Returns 0 on success or negative error code on failure. | |
247 | */ | |
248 | static int i2o_block_device_power(struct i2o_block_device *dev, u8 op) | |
249 | { | |
250 | struct i2o_device *i2o_dev = dev->i2o_dev; | |
251 | struct i2o_controller *c = i2o_dev->iop; | |
a1a5ea70 | 252 | struct i2o_message *msg; |
1da177e4 LT |
253 | int rc; |
254 | ||
a1a5ea70 ML |
255 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
256 | if (IS_ERR(msg)) | |
257 | return PTR_ERR(msg); | |
1da177e4 | 258 | |
a1a5ea70 ML |
259 | msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0); |
260 | msg->u.head[1] = | |
261 | cpu_to_le32(I2O_CMD_BLOCK_POWER << 24 | HOST_TID << 12 | i2o_dev-> | |
262 | lct_data.tid); | |
263 | msg->body[0] = cpu_to_le32(op << 24); | |
1da177e4 LT |
264 | osm_debug("Power...\n"); |
265 | ||
a1a5ea70 | 266 | rc = i2o_msg_post_wait(c, msg, 60); |
1da177e4 LT |
267 | if (!rc) |
268 | dev->power = op; | |
269 | ||
270 | return rc; | |
271 | }; | |
272 | ||
273 | /** | |
274 | * i2o_block_request_alloc - Allocate an I2O block request struct | |
275 | * | |
276 | * Allocates an I2O block request struct and initialize the list. | |
277 | * | |
278 | * Returns a i2o_block_request pointer on success or negative error code | |
279 | * on failure. | |
280 | */ | |
281 | static inline struct i2o_block_request *i2o_block_request_alloc(void) | |
282 | { | |
283 | struct i2o_block_request *ireq; | |
284 | ||
285 | ireq = mempool_alloc(i2o_blk_req_pool.pool, GFP_ATOMIC); | |
286 | if (!ireq) | |
287 | return ERR_PTR(-ENOMEM); | |
288 | ||
289 | INIT_LIST_HEAD(&ireq->queue); | |
3d1266c7 | 290 | sg_init_table(ireq->sg_table, I2O_MAX_PHYS_SEGMENTS); |
1da177e4 LT |
291 | |
292 | return ireq; | |
293 | }; | |
294 | ||
295 | /** | |
296 | * i2o_block_request_free - Frees a I2O block request | |
297 | * @ireq: I2O block request which should be freed | |
298 | * | |
d9489fb6 | 299 | * Frees the allocated memory (give it back to the request mempool). |
1da177e4 LT |
300 | */ |
301 | static inline void i2o_block_request_free(struct i2o_block_request *ireq) | |
302 | { | |
303 | mempool_free(ireq, i2o_blk_req_pool.pool); | |
304 | }; | |
305 | ||
306 | /** | |
307 | * i2o_block_sglist_alloc - Allocate the SG list and map it | |
f10378ff | 308 | * @c: I2O controller to which the request belongs |
1da177e4 | 309 | * @ireq: I2O block request |
d9489fb6 | 310 | * @mptr: message body pointer |
1da177e4 | 311 | * |
b595076a | 312 | * Builds the SG list and map it to be accessible by the controller. |
1da177e4 | 313 | * |
f10378ff | 314 | * Returns 0 on failure or 1 on success. |
1da177e4 | 315 | */ |
f10378ff ML |
316 | static inline int i2o_block_sglist_alloc(struct i2o_controller *c, |
317 | struct i2o_block_request *ireq, | |
a1a5ea70 | 318 | u32 ** mptr) |
1da177e4 | 319 | { |
1da177e4 | 320 | int nents; |
f10378ff | 321 | enum dma_data_direction direction; |
1da177e4 | 322 | |
f10378ff | 323 | ireq->dev = &c->pdev->dev; |
1da177e4 LT |
324 | nents = blk_rq_map_sg(ireq->req->q, ireq->req, ireq->sg_table); |
325 | ||
326 | if (rq_data_dir(ireq->req) == READ) | |
f10378ff | 327 | direction = PCI_DMA_FROMDEVICE; |
1da177e4 | 328 | else |
f10378ff | 329 | direction = PCI_DMA_TODEVICE; |
1da177e4 | 330 | |
f10378ff | 331 | ireq->sg_nents = nents; |
1da177e4 | 332 | |
f10378ff | 333 | return i2o_dma_map_sg(c, ireq->sg_table, nents, direction, mptr); |
1da177e4 LT |
334 | }; |
335 | ||
336 | /** | |
337 | * i2o_block_sglist_free - Frees the SG list | |
338 | * @ireq: I2O block request from which the SG should be freed | |
339 | * | |
340 | * Frees the SG list from the I2O block request. | |
341 | */ | |
342 | static inline void i2o_block_sglist_free(struct i2o_block_request *ireq) | |
343 | { | |
f10378ff | 344 | enum dma_data_direction direction; |
1da177e4 | 345 | |
f10378ff ML |
346 | if (rq_data_dir(ireq->req) == READ) |
347 | direction = PCI_DMA_FROMDEVICE; | |
348 | else | |
349 | direction = PCI_DMA_TODEVICE; | |
350 | ||
351 | dma_unmap_sg(ireq->dev, ireq->sg_table, ireq->sg_nents, direction); | |
1da177e4 LT |
352 | }; |
353 | ||
354 | /** | |
355 | * i2o_block_prep_req_fn - Allocates I2O block device specific struct | |
356 | * @q: request queue for the request | |
357 | * @req: the request to prepare | |
358 | * | |
359 | * Allocate the necessary i2o_block_request struct and connect it to | |
5e333309 | 360 | * the request. This is needed that we not lose the SG list later on. |
1da177e4 LT |
361 | * |
362 | * Returns BLKPREP_OK on success or BLKPREP_DEFER on failure. | |
363 | */ | |
364 | static int i2o_block_prep_req_fn(struct request_queue *q, struct request *req) | |
365 | { | |
366 | struct i2o_block_device *i2o_blk_dev = q->queuedata; | |
367 | struct i2o_block_request *ireq; | |
368 | ||
f10378ff ML |
369 | if (unlikely(!i2o_blk_dev)) { |
370 | osm_err("block device already removed\n"); | |
371 | return BLKPREP_KILL; | |
372 | } | |
373 | ||
1da177e4 LT |
374 | /* connect the i2o_block_request to the request */ |
375 | if (!req->special) { | |
376 | ireq = i2o_block_request_alloc(); | |
801678c5 | 377 | if (IS_ERR(ireq)) { |
1da177e4 LT |
378 | osm_debug("unable to allocate i2o_block_request!\n"); |
379 | return BLKPREP_DEFER; | |
380 | } | |
381 | ||
382 | ireq->i2o_blk_dev = i2o_blk_dev; | |
383 | req->special = ireq; | |
384 | ireq->req = req; | |
d1985ad1 | 385 | } |
1da177e4 | 386 | /* do not come back here */ |
4aff5e23 | 387 | req->cmd_flags |= REQ_DONTPREP; |
1da177e4 LT |
388 | |
389 | return BLKPREP_OK; | |
390 | }; | |
391 | ||
392 | /** | |
393 | * i2o_block_delayed_request_fn - delayed request queue function | |
c4028958 | 394 | * @work: the delayed request with the queue to start |
1da177e4 LT |
395 | * |
396 | * If the request queue is stopped for a disk, and there is no open | |
397 | * request, a new event is created, which calls this function to start | |
398 | * the queue after I2O_BLOCK_REQUEST_TIME. Otherwise the queue will never | |
399 | * be started again. | |
400 | */ | |
c4028958 | 401 | static void i2o_block_delayed_request_fn(struct work_struct *work) |
1da177e4 | 402 | { |
c4028958 DH |
403 | struct i2o_block_delayed_request *dreq = |
404 | container_of(work, struct i2o_block_delayed_request, | |
405 | work.work); | |
1da177e4 LT |
406 | struct request_queue *q = dreq->queue; |
407 | unsigned long flags; | |
408 | ||
409 | spin_lock_irqsave(q->queue_lock, flags); | |
410 | blk_start_queue(q); | |
411 | spin_unlock_irqrestore(q->queue_lock, flags); | |
412 | kfree(dreq); | |
413 | }; | |
414 | ||
415 | /** | |
f88e119c ML |
416 | * i2o_block_end_request - Post-processing of completed commands |
417 | * @req: request which should be completed | |
1381b7e8 | 418 | * @error: 0 for success, < 0 for error |
f88e119c | 419 | * @nr_bytes: number of bytes to complete |
1da177e4 | 420 | * |
f88e119c | 421 | * Mark the request as complete. The lock must not be held when entering. |
1da177e4 LT |
422 | * |
423 | */ | |
1381b7e8 | 424 | static void i2o_block_end_request(struct request *req, int error, |
f88e119c | 425 | int nr_bytes) |
1da177e4 | 426 | { |
f88e119c ML |
427 | struct i2o_block_request *ireq = req->special; |
428 | struct i2o_block_device *dev = ireq->i2o_blk_dev; | |
165125e1 | 429 | struct request_queue *q = req->q; |
1da177e4 LT |
430 | unsigned long flags; |
431 | ||
1011c1b9 | 432 | if (blk_end_request(req, error, nr_bytes)) |
1381b7e8 | 433 | if (error) |
1011c1b9 | 434 | blk_end_request_all(req, -EIO); |
1da177e4 | 435 | |
f88e119c | 436 | spin_lock_irqsave(q->queue_lock, flags); |
1da177e4 | 437 | |
f10378ff ML |
438 | if (likely(dev)) { |
439 | dev->open_queue_depth--; | |
440 | list_del(&ireq->queue); | |
441 | } | |
1da177e4 | 442 | |
f88e119c | 443 | blk_start_queue(q); |
1da177e4 | 444 | |
f88e119c | 445 | spin_unlock_irqrestore(q->queue_lock, flags); |
1da177e4 | 446 | |
f88e119c ML |
447 | i2o_block_sglist_free(ireq); |
448 | i2o_block_request_free(ireq); | |
449 | }; | |
1da177e4 | 450 | |
f88e119c ML |
451 | /** |
452 | * i2o_block_reply - Block OSM reply handler. | |
453 | * @c: I2O controller from which the message arrives | |
454 | * @m: message id of reply | |
d9489fb6 | 455 | * @msg: the actual I2O message reply |
f88e119c ML |
456 | * |
457 | * This function gets all the message replies. | |
458 | * | |
459 | */ | |
460 | static int i2o_block_reply(struct i2o_controller *c, u32 m, | |
461 | struct i2o_message *msg) | |
462 | { | |
463 | struct request *req; | |
1381b7e8 | 464 | int error = 0; |
1da177e4 LT |
465 | |
466 | req = i2o_cntxt_list_get(c, le32_to_cpu(msg->u.s.tcntxt)); | |
467 | if (unlikely(!req)) { | |
468 | osm_err("NULL reply received!\n"); | |
469 | return -1; | |
470 | } | |
471 | ||
1da177e4 LT |
472 | /* |
473 | * Lets see what is cooking. We stuffed the | |
474 | * request in the context. | |
475 | */ | |
476 | ||
f88e119c ML |
477 | if ((le32_to_cpu(msg->body[0]) >> 24) != 0) { |
478 | u32 status = le32_to_cpu(msg->body[0]); | |
1da177e4 LT |
479 | /* |
480 | * Device not ready means two things. One is that the | |
481 | * the thing went offline (but not a removal media) | |
482 | * | |
483 | * The second is that you have a SuperTrak 100 and the | |
484 | * firmware got constipated. Unlike standard i2o card | |
485 | * setups the supertrak returns an error rather than | |
486 | * blocking for the timeout in these cases. | |
487 | * | |
488 | * Don't stick a supertrak100 into cache aggressive modes | |
489 | */ | |
490 | ||
f10378ff ML |
491 | osm_err("TID %03x error status: 0x%02x, detailed status: " |
492 | "0x%04x\n", (le32_to_cpu(msg->u.head[1]) >> 12 & 0xfff), | |
f88e119c | 493 | status >> 24, status & 0xffff); |
1da177e4 | 494 | |
f88e119c | 495 | req->errors++; |
1da177e4 | 496 | |
1381b7e8 | 497 | error = -EIO; |
f88e119c | 498 | } |
1da177e4 | 499 | |
1381b7e8 | 500 | i2o_block_end_request(req, error, le32_to_cpu(msg->body[1])); |
1da177e4 LT |
501 | |
502 | return 1; | |
503 | }; | |
504 | ||
c4028958 | 505 | static void i2o_block_event(struct work_struct *work) |
1da177e4 | 506 | { |
c4028958 | 507 | struct i2o_event *evt = container_of(work, struct i2o_event, work); |
9e87545f | 508 | osm_debug("event received\n"); |
223230e7 | 509 | kfree(evt); |
1da177e4 LT |
510 | }; |
511 | ||
512 | /* | |
513 | * SCSI-CAM for ioctl geometry mapping | |
514 | * Duplicated with SCSI - this should be moved into somewhere common | |
515 | * perhaps genhd ? | |
516 | * | |
517 | * LBA -> CHS mapping table taken from: | |
518 | * | |
519 | * "Incorporating the I2O Architecture into BIOS for Intel Architecture | |
520 | * Platforms" | |
521 | * | |
522 | * This is an I2O document that is only available to I2O members, | |
523 | * not developers. | |
524 | * | |
525 | * From my understanding, this is how all the I2O cards do this | |
526 | * | |
527 | * Disk Size | Sectors | Heads | Cylinders | |
528 | * ---------------+---------+-------+------------------- | |
529 | * 1 < X <= 528M | 63 | 16 | X/(63 * 16 * 512) | |
530 | * 528M < X <= 1G | 63 | 32 | X/(63 * 32 * 512) | |
531 | * 1 < X <528M | 63 | 16 | X/(63 * 16 * 512) | |
532 | * 1 < X <528M | 63 | 16 | X/(63 * 16 * 512) | |
533 | * | |
534 | */ | |
535 | #define BLOCK_SIZE_528M 1081344 | |
536 | #define BLOCK_SIZE_1G 2097152 | |
537 | #define BLOCK_SIZE_21G 4403200 | |
538 | #define BLOCK_SIZE_42G 8806400 | |
539 | #define BLOCK_SIZE_84G 17612800 | |
540 | ||
541 | static void i2o_block_biosparam(unsigned long capacity, unsigned short *cyls, | |
542 | unsigned char *hds, unsigned char *secs) | |
543 | { | |
544 | unsigned long heads, sectors, cylinders; | |
545 | ||
546 | sectors = 63L; /* Maximize sectors per track */ | |
547 | if (capacity <= BLOCK_SIZE_528M) | |
548 | heads = 16; | |
549 | else if (capacity <= BLOCK_SIZE_1G) | |
550 | heads = 32; | |
551 | else if (capacity <= BLOCK_SIZE_21G) | |
552 | heads = 64; | |
553 | else if (capacity <= BLOCK_SIZE_42G) | |
554 | heads = 128; | |
555 | else | |
556 | heads = 255; | |
557 | ||
558 | cylinders = (unsigned long)capacity / (heads * sectors); | |
559 | ||
560 | *cyls = (unsigned short)cylinders; /* Stuff return values */ | |
561 | *secs = (unsigned char)sectors; | |
562 | *hds = (unsigned char)heads; | |
563 | } | |
564 | ||
565 | /** | |
566 | * i2o_block_open - Open the block device | |
b77b0ef2 RD |
567 | * @bdev: block device being opened |
568 | * @mode: file open mode | |
1da177e4 LT |
569 | * |
570 | * Power up the device, mount and lock the media. This function is called, | |
571 | * if the block device is opened for access. | |
572 | * | |
573 | * Returns 0 on success or negative error code on failure. | |
574 | */ | |
f3f6015b | 575 | static int i2o_block_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 576 | { |
f3f6015b | 577 | struct i2o_block_device *dev = bdev->bd_disk->private_data; |
1da177e4 LT |
578 | |
579 | if (!dev->i2o_dev) | |
580 | return -ENODEV; | |
581 | ||
2a48fc0a | 582 | mutex_lock(&i2o_block_mutex); |
1da177e4 LT |
583 | if (dev->power > 0x1f) |
584 | i2o_block_device_power(dev, 0x02); | |
585 | ||
586 | i2o_block_device_mount(dev->i2o_dev, -1); | |
587 | ||
588 | i2o_block_device_lock(dev->i2o_dev, -1); | |
589 | ||
590 | osm_debug("Ready.\n"); | |
2a48fc0a | 591 | mutex_unlock(&i2o_block_mutex); |
1da177e4 LT |
592 | |
593 | return 0; | |
594 | }; | |
595 | ||
596 | /** | |
597 | * i2o_block_release - Release the I2O block device | |
b77b0ef2 RD |
598 | * @disk: gendisk device being released |
599 | * @mode: file open mode | |
1da177e4 LT |
600 | * |
601 | * Unlock and unmount the media, and power down the device. Gets called if | |
602 | * the block device is closed. | |
603 | * | |
604 | * Returns 0 on success or negative error code on failure. | |
605 | */ | |
f3f6015b | 606 | static int i2o_block_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 607 | { |
1da177e4 LT |
608 | struct i2o_block_device *dev = disk->private_data; |
609 | u8 operation; | |
610 | ||
611 | /* | |
612 | * This is to deail with the case of an application | |
613 | * opening a device and then the device dissapears while | |
614 | * it's in use, and then the application tries to release | |
615 | * it. ex: Unmounting a deleted RAID volume at reboot. | |
616 | * If we send messages, it will just cause FAILs since | |
617 | * the TID no longer exists. | |
618 | */ | |
619 | if (!dev->i2o_dev) | |
620 | return 0; | |
621 | ||
2a48fc0a | 622 | mutex_lock(&i2o_block_mutex); |
1da177e4 LT |
623 | i2o_block_device_flush(dev->i2o_dev); |
624 | ||
625 | i2o_block_device_unlock(dev->i2o_dev, -1); | |
626 | ||
627 | if (dev->flags & (1 << 3 | 1 << 4)) /* Removable */ | |
628 | operation = 0x21; | |
629 | else | |
630 | operation = 0x24; | |
631 | ||
632 | i2o_block_device_power(dev, operation); | |
2a48fc0a | 633 | mutex_unlock(&i2o_block_mutex); |
1da177e4 LT |
634 | |
635 | return 0; | |
636 | } | |
637 | ||
a885c8c4 CH |
638 | static int i2o_block_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
639 | { | |
640 | i2o_block_biosparam(get_capacity(bdev->bd_disk), | |
641 | &geo->cylinders, &geo->heads, &geo->sectors); | |
642 | return 0; | |
643 | } | |
644 | ||
1da177e4 LT |
645 | /** |
646 | * i2o_block_ioctl - Issue device specific ioctl calls. | |
b77b0ef2 RD |
647 | * @bdev: block device being opened |
648 | * @mode: file open mode | |
1da177e4 LT |
649 | * @cmd: ioctl command |
650 | * @arg: arg | |
651 | * | |
652 | * Handles ioctl request for the block device. | |
653 | * | |
654 | * Return 0 on success or negative error on failure. | |
655 | */ | |
f3f6015b | 656 | static int i2o_block_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
657 | unsigned int cmd, unsigned long arg) |
658 | { | |
f3f6015b | 659 | struct gendisk *disk = bdev->bd_disk; |
1da177e4 | 660 | struct i2o_block_device *dev = disk->private_data; |
2daa672b | 661 | int ret = -ENOTTY; |
1da177e4 LT |
662 | |
663 | /* Anyone capable of this syscall can do *real bad* things */ | |
664 | ||
665 | if (!capable(CAP_SYS_ADMIN)) | |
666 | return -EPERM; | |
667 | ||
2a48fc0a | 668 | mutex_lock(&i2o_block_mutex); |
1da177e4 | 669 | switch (cmd) { |
1da177e4 | 670 | case BLKI2OGRSTRAT: |
2daa672b AB |
671 | ret = put_user(dev->rcache, (int __user *)arg); |
672 | break; | |
1da177e4 | 673 | case BLKI2OGWSTRAT: |
2daa672b AB |
674 | ret = put_user(dev->wcache, (int __user *)arg); |
675 | break; | |
1da177e4 | 676 | case BLKI2OSRSTRAT: |
2daa672b | 677 | ret = -EINVAL; |
1da177e4 | 678 | if (arg < 0 || arg > CACHE_SMARTFETCH) |
2daa672b | 679 | break; |
1da177e4 | 680 | dev->rcache = arg; |
2daa672b | 681 | ret = 0; |
1da177e4 LT |
682 | break; |
683 | case BLKI2OSWSTRAT: | |
2daa672b | 684 | ret = -EINVAL; |
1da177e4 LT |
685 | if (arg != 0 |
686 | && (arg < CACHE_WRITETHROUGH || arg > CACHE_SMARTBACK)) | |
2daa672b | 687 | break; |
1da177e4 | 688 | dev->wcache = arg; |
2daa672b | 689 | ret = 0; |
1da177e4 LT |
690 | break; |
691 | } | |
2a48fc0a | 692 | mutex_unlock(&i2o_block_mutex); |
2daa672b AB |
693 | |
694 | return ret; | |
1da177e4 LT |
695 | }; |
696 | ||
697 | /** | |
698 | * i2o_block_media_changed - Have we seen a media change? | |
699 | * @disk: gendisk which should be verified | |
700 | * | |
701 | * Verifies if the media has changed. | |
702 | * | |
703 | * Returns 1 if the media was changed or 0 otherwise. | |
704 | */ | |
705 | static int i2o_block_media_changed(struct gendisk *disk) | |
706 | { | |
707 | struct i2o_block_device *p = disk->private_data; | |
708 | ||
709 | if (p->media_change_flag) { | |
710 | p->media_change_flag = 0; | |
711 | return 1; | |
712 | } | |
713 | return 0; | |
714 | } | |
715 | ||
716 | /** | |
717 | * i2o_block_transfer - Transfer a request to/from the I2O controller | |
718 | * @req: the request which should be transfered | |
719 | * | |
720 | * This function converts the request into a I2O message. The necessary | |
721 | * DMA buffers are allocated and after everything is setup post the message | |
722 | * to the I2O controller. No cleanup is done by this function. It is done | |
723 | * on the interrupt side when the reply arrives. | |
724 | * | |
725 | * Return 0 on success or negative error code on failure. | |
726 | */ | |
727 | static int i2o_block_transfer(struct request *req) | |
728 | { | |
729 | struct i2o_block_device *dev = req->rq_disk->private_data; | |
f10378ff | 730 | struct i2o_controller *c; |
d2367006 | 731 | u32 tid; |
a1a5ea70 ML |
732 | struct i2o_message *msg; |
733 | u32 *mptr; | |
1da177e4 | 734 | struct i2o_block_request *ireq = req->special; |
1da177e4 | 735 | u32 tcntxt; |
f10378ff ML |
736 | u32 sgl_offset = SGL_OFFSET_8; |
737 | u32 ctl_flags = 0x00000000; | |
1da177e4 | 738 | int rc; |
f10378ff ML |
739 | u32 cmd; |
740 | ||
741 | if (unlikely(!dev->i2o_dev)) { | |
742 | osm_err("transfer to removed drive\n"); | |
743 | rc = -ENODEV; | |
744 | goto exit; | |
745 | } | |
746 | ||
d2367006 | 747 | tid = dev->i2o_dev->lct_data.tid; |
f10378ff | 748 | c = dev->i2o_dev->iop; |
1da177e4 | 749 | |
a1a5ea70 ML |
750 | msg = i2o_msg_get(c); |
751 | if (IS_ERR(msg)) { | |
752 | rc = PTR_ERR(msg); | |
1da177e4 LT |
753 | goto exit; |
754 | } | |
755 | ||
756 | tcntxt = i2o_cntxt_list_add(c, req); | |
757 | if (!tcntxt) { | |
758 | rc = -ENOMEM; | |
759 | goto nop_msg; | |
760 | } | |
761 | ||
a1a5ea70 ML |
762 | msg->u.s.icntxt = cpu_to_le32(i2o_block_driver.context); |
763 | msg->u.s.tcntxt = cpu_to_le32(tcntxt); | |
1da177e4 | 764 | |
f10378ff | 765 | mptr = &msg->body[0]; |
1da177e4 LT |
766 | |
767 | if (rq_data_dir(req) == READ) { | |
f10378ff ML |
768 | cmd = I2O_CMD_BLOCK_READ << 24; |
769 | ||
1da177e4 | 770 | switch (dev->rcache) { |
1da177e4 | 771 | case CACHE_PREFETCH: |
f10378ff | 772 | ctl_flags = 0x201F0008; |
1da177e4 | 773 | break; |
f10378ff | 774 | |
1da177e4 | 775 | case CACHE_SMARTFETCH: |
83096ebf | 776 | if (blk_rq_sectors(req) > 16) |
f10378ff | 777 | ctl_flags = 0x201F0008; |
1da177e4 | 778 | else |
f10378ff ML |
779 | ctl_flags = 0x001F0000; |
780 | break; | |
781 | ||
782 | default: | |
1da177e4 LT |
783 | break; |
784 | } | |
785 | } else { | |
f10378ff ML |
786 | cmd = I2O_CMD_BLOCK_WRITE << 24; |
787 | ||
1da177e4 | 788 | switch (dev->wcache) { |
1da177e4 | 789 | case CACHE_WRITETHROUGH: |
f10378ff | 790 | ctl_flags = 0x001F0008; |
1da177e4 LT |
791 | break; |
792 | case CACHE_WRITEBACK: | |
f10378ff | 793 | ctl_flags = 0x001F0010; |
1da177e4 LT |
794 | break; |
795 | case CACHE_SMARTBACK: | |
83096ebf | 796 | if (blk_rq_sectors(req) > 16) |
f10378ff | 797 | ctl_flags = 0x001F0004; |
1da177e4 | 798 | else |
f10378ff | 799 | ctl_flags = 0x001F0010; |
1da177e4 LT |
800 | break; |
801 | case CACHE_SMARTTHROUGH: | |
83096ebf | 802 | if (blk_rq_sectors(req) > 16) |
f10378ff | 803 | ctl_flags = 0x001F0004; |
1da177e4 | 804 | else |
f10378ff ML |
805 | ctl_flags = 0x001F0010; |
806 | default: | |
807 | break; | |
808 | } | |
809 | } | |
810 | ||
811 | #ifdef CONFIG_I2O_EXT_ADAPTEC | |
812 | if (c->adaptec) { | |
813 | u8 cmd[10]; | |
814 | u32 scsi_flags; | |
e1defc4f | 815 | u16 hwsec; |
f10378ff | 816 | |
e1defc4f | 817 | hwsec = queue_logical_block_size(req->q) >> KERNEL_SECTOR_SHIFT; |
f10378ff ML |
818 | memset(cmd, 0, 10); |
819 | ||
820 | sgl_offset = SGL_OFFSET_12; | |
821 | ||
a1a5ea70 ML |
822 | msg->u.head[1] = |
823 | cpu_to_le32(I2O_CMD_PRIVATE << 24 | HOST_TID << 12 | tid); | |
f10378ff | 824 | |
a1a5ea70 ML |
825 | *mptr++ = cpu_to_le32(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC); |
826 | *mptr++ = cpu_to_le32(tid); | |
f10378ff ML |
827 | |
828 | /* | |
829 | * ENABLE_DISCONNECT | |
830 | * SIMPLE_TAG | |
831 | * RETURN_SENSE_DATA_IN_REPLY_MESSAGE_FRAME | |
832 | */ | |
833 | if (rq_data_dir(req) == READ) { | |
2e1973a3 | 834 | cmd[0] = READ_10; |
f10378ff ML |
835 | scsi_flags = 0x60a0000a; |
836 | } else { | |
2e1973a3 | 837 | cmd[0] = WRITE_10; |
f10378ff | 838 | scsi_flags = 0xa0a0000a; |
1da177e4 | 839 | } |
f10378ff | 840 | |
a1a5ea70 | 841 | *mptr++ = cpu_to_le32(scsi_flags); |
f10378ff | 842 | |
83096ebf TH |
843 | *((u32 *) & cmd[2]) = cpu_to_be32(blk_rq_pos(req) * hwsec); |
844 | *((u16 *) & cmd[7]) = cpu_to_be16(blk_rq_sectors(req) * hwsec); | |
f10378ff | 845 | |
a1a5ea70 | 846 | memcpy(mptr, cmd, 10); |
f10378ff | 847 | mptr += 4; |
1011c1b9 | 848 | *mptr++ = cpu_to_le32(blk_rq_bytes(req)); |
f10378ff ML |
849 | } else |
850 | #endif | |
851 | { | |
a1a5ea70 ML |
852 | msg->u.head[1] = cpu_to_le32(cmd | HOST_TID << 12 | tid); |
853 | *mptr++ = cpu_to_le32(ctl_flags); | |
1011c1b9 | 854 | *mptr++ = cpu_to_le32(blk_rq_bytes(req)); |
83096ebf TH |
855 | *mptr++ = |
856 | cpu_to_le32((u32) (blk_rq_pos(req) << KERNEL_SECTOR_SHIFT)); | |
a1a5ea70 | 857 | *mptr++ = |
83096ebf | 858 | cpu_to_le32(blk_rq_pos(req) >> (32 - KERNEL_SECTOR_SHIFT)); |
1da177e4 LT |
859 | } |
860 | ||
f10378ff ML |
861 | if (!i2o_block_sglist_alloc(c, ireq, &mptr)) { |
862 | rc = -ENOMEM; | |
863 | goto context_remove; | |
1da177e4 LT |
864 | } |
865 | ||
a1a5ea70 ML |
866 | msg->u.head[0] = |
867 | cpu_to_le32(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) | sgl_offset); | |
1da177e4 LT |
868 | |
869 | list_add_tail(&ireq->queue, &dev->open_queue); | |
870 | dev->open_queue_depth++; | |
871 | ||
a1a5ea70 | 872 | i2o_msg_post(c, msg); |
1da177e4 LT |
873 | |
874 | return 0; | |
875 | ||
876 | context_remove: | |
877 | i2o_cntxt_list_remove(c, req); | |
878 | ||
879 | nop_msg: | |
a1a5ea70 | 880 | i2o_msg_nop(c, msg); |
1da177e4 LT |
881 | |
882 | exit: | |
883 | return rc; | |
884 | }; | |
885 | ||
886 | /** | |
887 | * i2o_block_request_fn - request queue handling function | |
d9489fb6 | 888 | * @q: request queue from which the request could be fetched |
1da177e4 LT |
889 | * |
890 | * Takes the next request from the queue, transfers it and if no error | |
891 | * occurs dequeue it from the queue. On arrival of the reply the message | |
892 | * will be processed further. If an error occurs requeue the request. | |
893 | */ | |
894 | static void i2o_block_request_fn(struct request_queue *q) | |
895 | { | |
896 | struct request *req; | |
897 | ||
898 | while (!blk_queue_plugged(q)) { | |
9934c8c0 | 899 | req = blk_peek_request(q); |
1da177e4 LT |
900 | if (!req) |
901 | break; | |
902 | ||
33659ebb | 903 | if (req->cmd_type == REQ_TYPE_FS) { |
1da177e4 LT |
904 | struct i2o_block_delayed_request *dreq; |
905 | struct i2o_block_request *ireq = req->special; | |
906 | unsigned int queue_depth; | |
907 | ||
908 | queue_depth = ireq->i2o_blk_dev->open_queue_depth; | |
909 | ||
f10378ff | 910 | if (queue_depth < I2O_BLOCK_MAX_OPEN_REQUESTS) { |
1da177e4 | 911 | if (!i2o_block_transfer(req)) { |
9934c8c0 | 912 | blk_start_request(req); |
1da177e4 | 913 | continue; |
f10378ff ML |
914 | } else |
915 | osm_info("transfer error\n"); | |
916 | } | |
1da177e4 LT |
917 | |
918 | if (queue_depth) | |
919 | break; | |
920 | ||
921 | /* stop the queue and retry later */ | |
922 | dreq = kmalloc(sizeof(*dreq), GFP_ATOMIC); | |
923 | if (!dreq) | |
924 | continue; | |
925 | ||
926 | dreq->queue = q; | |
c4028958 DH |
927 | INIT_DELAYED_WORK(&dreq->work, |
928 | i2o_block_delayed_request_fn); | |
1da177e4 | 929 | |
1da177e4 LT |
930 | if (!queue_delayed_work(i2o_block_driver.event_queue, |
931 | &dreq->work, | |
932 | I2O_BLOCK_RETRY_TIME)) | |
933 | kfree(dreq); | |
934 | else { | |
935 | blk_stop_queue(q); | |
936 | break; | |
937 | } | |
296b2f6a | 938 | } else { |
9934c8c0 | 939 | blk_start_request(req); |
296b2f6a TH |
940 | __blk_end_request_all(req, -EIO); |
941 | } | |
1da177e4 LT |
942 | } |
943 | }; | |
944 | ||
945 | /* I2O Block device operations definition */ | |
83d5cde4 | 946 | static const struct block_device_operations i2o_block_fops = { |
1da177e4 | 947 | .owner = THIS_MODULE, |
f3f6015b AV |
948 | .open = i2o_block_open, |
949 | .release = i2o_block_release, | |
34484062 | 950 | .ioctl = i2o_block_ioctl, |
2daa672b | 951 | .compat_ioctl = i2o_block_ioctl, |
a885c8c4 | 952 | .getgeo = i2o_block_getgeo, |
1da177e4 LT |
953 | .media_changed = i2o_block_media_changed |
954 | }; | |
955 | ||
956 | /** | |
957 | * i2o_block_device_alloc - Allocate memory for a I2O Block device | |
958 | * | |
959 | * Allocate memory for the i2o_block_device struct, gendisk and request | |
960 | * queue and initialize them as far as no additional information is needed. | |
961 | * | |
af901ca1 | 962 | * Returns a pointer to the allocated I2O Block device on success or a |
1da177e4 LT |
963 | * negative error code on failure. |
964 | */ | |
965 | static struct i2o_block_device *i2o_block_device_alloc(void) | |
966 | { | |
967 | struct i2o_block_device *dev; | |
968 | struct gendisk *gd; | |
969 | struct request_queue *queue; | |
970 | int rc; | |
971 | ||
f6ed39a6 | 972 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
1da177e4 LT |
973 | if (!dev) { |
974 | osm_err("Insufficient memory to allocate I2O Block disk.\n"); | |
975 | rc = -ENOMEM; | |
976 | goto exit; | |
977 | } | |
1da177e4 LT |
978 | |
979 | INIT_LIST_HEAD(&dev->open_queue); | |
980 | spin_lock_init(&dev->lock); | |
981 | dev->rcache = CACHE_PREFETCH; | |
982 | dev->wcache = CACHE_WRITEBACK; | |
983 | ||
984 | /* allocate a gendisk with 16 partitions */ | |
985 | gd = alloc_disk(16); | |
986 | if (!gd) { | |
987 | osm_err("Insufficient memory to allocate gendisk.\n"); | |
988 | rc = -ENOMEM; | |
989 | goto cleanup_dev; | |
990 | } | |
991 | ||
992 | /* initialize the request queue */ | |
993 | queue = blk_init_queue(i2o_block_request_fn, &dev->lock); | |
994 | if (!queue) { | |
995 | osm_err("Insufficient memory to allocate request queue.\n"); | |
996 | rc = -ENOMEM; | |
997 | goto cleanup_queue; | |
998 | } | |
999 | ||
1000 | blk_queue_prep_rq(queue, i2o_block_prep_req_fn); | |
1001 | ||
1002 | gd->major = I2O_MAJOR; | |
1003 | gd->queue = queue; | |
1004 | gd->fops = &i2o_block_fops; | |
1005 | gd->private_data = dev; | |
1006 | ||
1007 | dev->gd = gd; | |
1008 | ||
1009 | return dev; | |
1010 | ||
1011 | cleanup_queue: | |
1012 | put_disk(gd); | |
1013 | ||
1014 | cleanup_dev: | |
1015 | kfree(dev); | |
1016 | ||
1017 | exit: | |
1018 | return ERR_PTR(rc); | |
1019 | }; | |
1020 | ||
1021 | /** | |
1022 | * i2o_block_probe - verify if dev is a I2O Block device and install it | |
1023 | * @dev: device to verify if it is a I2O Block device | |
1024 | * | |
1025 | * We only verify if the user_tid of the device is 0xfff and then install | |
1026 | * the device. Otherwise it is used by some other device (e. g. RAID). | |
1027 | * | |
1028 | * Returns 0 on success or negative error code on failure. | |
1029 | */ | |
1030 | static int i2o_block_probe(struct device *dev) | |
1031 | { | |
1032 | struct i2o_device *i2o_dev = to_i2o_device(dev); | |
1da177e4 | 1033 | struct i2o_controller *c = i2o_dev->iop; |
f33213ec | 1034 | struct i2o_block_device *i2o_blk_dev; |
1da177e4 LT |
1035 | struct gendisk *gd; |
1036 | struct request_queue *queue; | |
1037 | static int unit = 0; | |
1038 | int rc; | |
1039 | u64 size; | |
1040 | u32 blocksize; | |
f10378ff | 1041 | u16 body_size = 4; |
793fd15d | 1042 | u16 power; |
f10378ff ML |
1043 | unsigned short max_sectors; |
1044 | ||
1045 | #ifdef CONFIG_I2O_EXT_ADAPTEC | |
1046 | if (c->adaptec) | |
1047 | body_size = 8; | |
1048 | #endif | |
1049 | ||
1050 | if (c->limit_sectors) | |
1051 | max_sectors = I2O_MAX_SECTORS_LIMITED; | |
1052 | else | |
1053 | max_sectors = I2O_MAX_SECTORS; | |
1da177e4 LT |
1054 | |
1055 | /* skip devices which are used by IOP */ | |
1056 | if (i2o_dev->lct_data.user_tid != 0xfff) { | |
1057 | osm_debug("skipping used device %03x\n", i2o_dev->lct_data.tid); | |
1058 | return -ENODEV; | |
1059 | } | |
1060 | ||
1da177e4 LT |
1061 | if (i2o_device_claim(i2o_dev)) { |
1062 | osm_warn("Unable to claim device. Installation aborted\n"); | |
1063 | rc = -EFAULT; | |
1064 | goto exit; | |
1065 | } | |
1066 | ||
1067 | i2o_blk_dev = i2o_block_device_alloc(); | |
1068 | if (IS_ERR(i2o_blk_dev)) { | |
1069 | osm_err("could not alloc a new I2O block device"); | |
1070 | rc = PTR_ERR(i2o_blk_dev); | |
1071 | goto claim_release; | |
1072 | } | |
1073 | ||
1074 | i2o_blk_dev->i2o_dev = i2o_dev; | |
1075 | dev_set_drvdata(dev, i2o_blk_dev); | |
1076 | ||
1077 | /* setup gendisk */ | |
1078 | gd = i2o_blk_dev->gd; | |
1079 | gd->first_minor = unit << 4; | |
1080 | sprintf(gd->disk_name, "i2o/hd%c", 'a' + unit); | |
1da177e4 LT |
1081 | gd->driverfs_dev = &i2o_dev->device; |
1082 | ||
1083 | /* setup request queue */ | |
1084 | queue = gd->queue; | |
1085 | queue->queuedata = i2o_blk_dev; | |
1086 | ||
086fa5ff | 1087 | blk_queue_max_hw_sectors(queue, max_sectors); |
8a78362c | 1088 | blk_queue_max_segments(queue, i2o_sg_tablesize(c, body_size)); |
1da177e4 | 1089 | |
ae5fbf77 VA |
1090 | osm_debug("max sectors = %d\n", queue->max_sectors); |
1091 | osm_debug("phys segments = %d\n", queue->max_phys_segments); | |
f10378ff | 1092 | osm_debug("max hw segments = %d\n", queue->max_hw_segments); |
1da177e4 LT |
1093 | |
1094 | /* | |
1095 | * Ask for the current media data. If that isn't supported | |
1096 | * then we ask for the device capacity data | |
1097 | */ | |
793fd15d ML |
1098 | if (!i2o_parm_field_get(i2o_dev, 0x0004, 1, &blocksize, 4) || |
1099 | !i2o_parm_field_get(i2o_dev, 0x0000, 3, &blocksize, 4)) { | |
e1defc4f | 1100 | blk_queue_logical_block_size(queue, le32_to_cpu(blocksize)); |
f10378ff ML |
1101 | } else |
1102 | osm_warn("unable to get blocksize of %s\n", gd->disk_name); | |
1da177e4 | 1103 | |
793fd15d ML |
1104 | if (!i2o_parm_field_get(i2o_dev, 0x0004, 0, &size, 8) || |
1105 | !i2o_parm_field_get(i2o_dev, 0x0000, 4, &size, 8)) { | |
1106 | set_capacity(gd, le64_to_cpu(size) >> KERNEL_SECTOR_SHIFT); | |
f10378ff ML |
1107 | } else |
1108 | osm_warn("could not get size of %s\n", gd->disk_name); | |
f88e119c | 1109 | |
793fd15d ML |
1110 | if (!i2o_parm_field_get(i2o_dev, 0x0000, 2, &power, 2)) |
1111 | i2o_blk_dev->power = power; | |
1da177e4 | 1112 | |
1da177e4 LT |
1113 | i2o_event_register(i2o_dev, &i2o_block_driver, 0, 0xffffffff); |
1114 | ||
1115 | add_disk(gd); | |
1116 | ||
1117 | unit++; | |
1118 | ||
f88e119c ML |
1119 | osm_info("device added (TID: %03x): %s\n", i2o_dev->lct_data.tid, |
1120 | i2o_blk_dev->gd->disk_name); | |
1121 | ||
1da177e4 LT |
1122 | return 0; |
1123 | ||
1124 | claim_release: | |
1125 | i2o_device_claim_release(i2o_dev); | |
1126 | ||
1127 | exit: | |
1128 | return rc; | |
1129 | }; | |
1130 | ||
1131 | /* Block OSM driver struct */ | |
1132 | static struct i2o_driver i2o_block_driver = { | |
1133 | .name = OSM_NAME, | |
1134 | .event = i2o_block_event, | |
1135 | .reply = i2o_block_reply, | |
1136 | .classes = i2o_block_class_id, | |
1137 | .driver = { | |
1138 | .probe = i2o_block_probe, | |
1139 | .remove = i2o_block_remove, | |
1140 | }, | |
1141 | }; | |
1142 | ||
1143 | /** | |
1144 | * i2o_block_init - Block OSM initialization function | |
1145 | * | |
1146 | * Allocate the slab and mempool for request structs, registers i2o_block | |
1147 | * block device and finally register the Block OSM in the I2O core. | |
1148 | * | |
1149 | * Returns 0 on success or negative error code on failure. | |
1150 | */ | |
1151 | static int __init i2o_block_init(void) | |
1152 | { | |
1153 | int rc; | |
1154 | int size; | |
1155 | ||
1156 | printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n"); | |
1157 | ||
1158 | /* Allocate request mempool and slab */ | |
1159 | size = sizeof(struct i2o_block_request); | |
1160 | i2o_blk_req_pool.slab = kmem_cache_create("i2o_block_req", size, 0, | |
20c2df83 | 1161 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
1162 | if (!i2o_blk_req_pool.slab) { |
1163 | osm_err("can't init request slab\n"); | |
1164 | rc = -ENOMEM; | |
1165 | goto exit; | |
1166 | } | |
1167 | ||
93d2341c MD |
1168 | i2o_blk_req_pool.pool = |
1169 | mempool_create_slab_pool(I2O_BLOCK_REQ_MEMPOOL_SIZE, | |
1170 | i2o_blk_req_pool.slab); | |
1da177e4 LT |
1171 | if (!i2o_blk_req_pool.pool) { |
1172 | osm_err("can't init request mempool\n"); | |
1173 | rc = -ENOMEM; | |
1174 | goto free_slab; | |
1175 | } | |
1176 | ||
1177 | /* Register the block device interfaces */ | |
1178 | rc = register_blkdev(I2O_MAJOR, "i2o_block"); | |
1179 | if (rc) { | |
1180 | osm_err("unable to register block device\n"); | |
1181 | goto free_mempool; | |
1182 | } | |
1183 | #ifdef MODULE | |
1184 | osm_info("registered device at major %d\n", I2O_MAJOR); | |
1185 | #endif | |
1186 | ||
1187 | /* Register Block OSM into I2O core */ | |
1188 | rc = i2o_driver_register(&i2o_block_driver); | |
1189 | if (rc) { | |
1190 | osm_err("Could not register Block driver\n"); | |
1191 | goto unregister_blkdev; | |
1192 | } | |
1193 | ||
1194 | return 0; | |
1195 | ||
1196 | unregister_blkdev: | |
1197 | unregister_blkdev(I2O_MAJOR, "i2o_block"); | |
1198 | ||
1199 | free_mempool: | |
1200 | mempool_destroy(i2o_blk_req_pool.pool); | |
1201 | ||
1202 | free_slab: | |
1203 | kmem_cache_destroy(i2o_blk_req_pool.slab); | |
1204 | ||
1205 | exit: | |
1206 | return rc; | |
1207 | }; | |
1208 | ||
1209 | /** | |
1210 | * i2o_block_exit - Block OSM exit function | |
1211 | * | |
1212 | * Unregisters Block OSM from I2O core, unregisters i2o_block block device | |
1213 | * and frees the mempool and slab. | |
1214 | */ | |
1215 | static void __exit i2o_block_exit(void) | |
1216 | { | |
1217 | /* Unregister I2O Block OSM from I2O core */ | |
1218 | i2o_driver_unregister(&i2o_block_driver); | |
1219 | ||
1220 | /* Unregister block device */ | |
1221 | unregister_blkdev(I2O_MAJOR, "i2o_block"); | |
1222 | ||
1223 | /* Free request mempool and slab */ | |
1224 | mempool_destroy(i2o_blk_req_pool.pool); | |
1225 | kmem_cache_destroy(i2o_blk_req_pool.slab); | |
1226 | }; | |
1227 | ||
1228 | MODULE_AUTHOR("Red Hat"); | |
1229 | MODULE_LICENSE("GPL"); | |
1230 | MODULE_DESCRIPTION(OSM_DESCRIPTION); | |
1231 | MODULE_VERSION(OSM_VERSION); | |
1232 | ||
1233 | module_init(i2o_block_init); | |
1234 | module_exit(i2o_block_exit); |