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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> | |
54 | #include <linux/i2o.h> | |
55 | ||
56 | #include <linux/mempool.h> | |
57 | ||
58 | #include <linux/genhd.h> | |
59 | #include <linux/blkdev.h> | |
60 | #include <linux/hdreg.h> | |
61 | ||
2e1973a3 ML |
62 | #include <scsi/scsi.h> |
63 | ||
1da177e4 LT |
64 | #include "i2o_block.h" |
65 | ||
66 | #define OSM_NAME "block-osm" | |
f6ed39a6 | 67 | #define OSM_VERSION "1.325" |
1da177e4 LT |
68 | #define OSM_DESCRIPTION "I2O Block Device OSM" |
69 | ||
70 | static struct i2o_driver i2o_block_driver; | |
71 | ||
72 | /* global Block OSM request mempool */ | |
73 | static struct i2o_block_mempool i2o_blk_req_pool; | |
74 | ||
75 | /* Block OSM class handling definition */ | |
76 | static struct i2o_class_id i2o_block_class_id[] = { | |
77 | {I2O_CLASS_RANDOM_BLOCK_STORAGE}, | |
78 | {I2O_CLASS_END} | |
79 | }; | |
80 | ||
81 | /** | |
82 | * i2o_block_device_free - free the memory of the I2O Block device | |
83 | * @dev: I2O Block device, which should be cleaned up | |
84 | * | |
85 | * Frees the request queue, gendisk and the i2o_block_device structure. | |
86 | */ | |
87 | static void i2o_block_device_free(struct i2o_block_device *dev) | |
88 | { | |
89 | blk_cleanup_queue(dev->gd->queue); | |
90 | ||
91 | put_disk(dev->gd); | |
92 | ||
93 | kfree(dev); | |
94 | }; | |
95 | ||
96 | /** | |
97 | * i2o_block_remove - remove the I2O Block device from the system again | |
98 | * @dev: I2O Block device which should be removed | |
99 | * | |
100 | * Remove gendisk from system and free all allocated memory. | |
101 | * | |
102 | * Always returns 0. | |
103 | */ | |
104 | static int i2o_block_remove(struct device *dev) | |
105 | { | |
106 | struct i2o_device *i2o_dev = to_i2o_device(dev); | |
107 | struct i2o_block_device *i2o_blk_dev = dev_get_drvdata(dev); | |
108 | ||
f88e119c ML |
109 | osm_info("device removed (TID: %03x): %s\n", i2o_dev->lct_data.tid, |
110 | i2o_blk_dev->gd->disk_name); | |
1da177e4 LT |
111 | |
112 | i2o_event_register(i2o_dev, &i2o_block_driver, 0, 0); | |
113 | ||
114 | del_gendisk(i2o_blk_dev->gd); | |
115 | ||
116 | dev_set_drvdata(dev, NULL); | |
117 | ||
118 | i2o_device_claim_release(i2o_dev); | |
119 | ||
120 | i2o_block_device_free(i2o_blk_dev); | |
121 | ||
122 | return 0; | |
123 | }; | |
124 | ||
125 | /** | |
126 | * i2o_block_device flush - Flush all dirty data of I2O device dev | |
127 | * @dev: I2O device which should be flushed | |
128 | * | |
129 | * Flushes all dirty data on device dev. | |
130 | * | |
131 | * Returns 0 on success or negative error code on failure. | |
132 | */ | |
133 | static int i2o_block_device_flush(struct i2o_device *dev) | |
134 | { | |
a1a5ea70 | 135 | struct i2o_message *msg; |
1da177e4 | 136 | |
a1a5ea70 ML |
137 | msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET); |
138 | if (IS_ERR(msg)) | |
139 | return PTR_ERR(msg); | |
1da177e4 | 140 | |
a1a5ea70 ML |
141 | msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); |
142 | msg->u.head[1] = | |
143 | cpu_to_le32(I2O_CMD_BLOCK_CFLUSH << 24 | HOST_TID << 12 | dev-> | |
144 | lct_data.tid); | |
145 | msg->body[0] = cpu_to_le32(60 << 16); | |
1da177e4 LT |
146 | osm_debug("Flushing...\n"); |
147 | ||
a1a5ea70 | 148 | return i2o_msg_post_wait(dev->iop, msg, 60); |
1da177e4 LT |
149 | }; |
150 | ||
f10378ff ML |
151 | /** |
152 | * i2o_block_issue_flush - device-flush interface for block-layer | |
153 | * @queue: the request queue of the device which should be flushed | |
154 | * @disk: gendisk | |
155 | * @error_sector: error offset | |
156 | * | |
157 | * Helper function to provide flush functionality to block-layer. | |
158 | * | |
159 | * Returns 0 on success or negative error code on failure. | |
160 | */ | |
161 | ||
162 | static int i2o_block_issue_flush(request_queue_t * queue, struct gendisk *disk, | |
163 | sector_t * error_sector) | |
164 | { | |
165 | struct i2o_block_device *i2o_blk_dev = queue->queuedata; | |
166 | int rc = -ENODEV; | |
167 | ||
168 | if (likely(i2o_blk_dev)) | |
169 | rc = i2o_block_device_flush(i2o_blk_dev->i2o_dev); | |
170 | ||
171 | return rc; | |
172 | } | |
173 | ||
1da177e4 LT |
174 | /** |
175 | * i2o_block_device_mount - Mount (load) the media of device dev | |
176 | * @dev: I2O device which should receive the mount request | |
177 | * @media_id: Media Identifier | |
178 | * | |
179 | * Load a media into drive. Identifier should be set to -1, because the | |
180 | * spec does not support any other value. | |
181 | * | |
182 | * Returns 0 on success or negative error code on failure. | |
183 | */ | |
184 | static int i2o_block_device_mount(struct i2o_device *dev, u32 media_id) | |
185 | { | |
a1a5ea70 ML |
186 | struct i2o_message *msg; |
187 | ||
188 | msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET); | |
189 | if (IS_ERR(msg)) | |
190 | return PTR_ERR(msg); | |
191 | ||
192 | msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); | |
193 | msg->u.head[1] = | |
194 | cpu_to_le32(I2O_CMD_BLOCK_MMOUNT << 24 | HOST_TID << 12 | dev-> | |
195 | lct_data.tid); | |
196 | msg->body[0] = cpu_to_le32(-1); | |
197 | msg->body[1] = cpu_to_le32(0x00000000); | |
1da177e4 LT |
198 | osm_debug("Mounting...\n"); |
199 | ||
a1a5ea70 | 200 | return i2o_msg_post_wait(dev->iop, msg, 2); |
1da177e4 LT |
201 | }; |
202 | ||
203 | /** | |
204 | * i2o_block_device_lock - Locks the media of device dev | |
205 | * @dev: I2O device which should receive the lock request | |
206 | * @media_id: Media Identifier | |
207 | * | |
208 | * Lock media of device dev to prevent removal. The media identifier | |
209 | * should be set to -1, because the spec does not support any other value. | |
210 | * | |
211 | * Returns 0 on success or negative error code on failure. | |
212 | */ | |
213 | static int i2o_block_device_lock(struct i2o_device *dev, u32 media_id) | |
214 | { | |
a1a5ea70 | 215 | struct i2o_message *msg; |
1da177e4 | 216 | |
a1a5ea70 ML |
217 | msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET); |
218 | if (IS_ERR(msg) == I2O_QUEUE_EMPTY) | |
219 | return PTR_ERR(msg); | |
1da177e4 | 220 | |
a1a5ea70 ML |
221 | msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); |
222 | msg->u.head[1] = | |
223 | cpu_to_le32(I2O_CMD_BLOCK_MLOCK << 24 | HOST_TID << 12 | dev-> | |
224 | lct_data.tid); | |
225 | msg->body[0] = cpu_to_le32(-1); | |
1da177e4 LT |
226 | osm_debug("Locking...\n"); |
227 | ||
a1a5ea70 | 228 | return i2o_msg_post_wait(dev->iop, msg, 2); |
1da177e4 LT |
229 | }; |
230 | ||
231 | /** | |
232 | * i2o_block_device_unlock - Unlocks the media of device dev | |
233 | * @dev: I2O device which should receive the unlocked request | |
234 | * @media_id: Media Identifier | |
235 | * | |
236 | * Unlocks the media in device dev. The media identifier should be set to | |
237 | * -1, because the spec does not support any other value. | |
238 | * | |
239 | * Returns 0 on success or negative error code on failure. | |
240 | */ | |
241 | static int i2o_block_device_unlock(struct i2o_device *dev, u32 media_id) | |
242 | { | |
a1a5ea70 | 243 | struct i2o_message *msg; |
1da177e4 | 244 | |
a1a5ea70 ML |
245 | msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET); |
246 | if (IS_ERR(msg)) | |
247 | return PTR_ERR(msg); | |
1da177e4 | 248 | |
a1a5ea70 ML |
249 | msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); |
250 | msg->u.head[1] = | |
251 | cpu_to_le32(I2O_CMD_BLOCK_MUNLOCK << 24 | HOST_TID << 12 | dev-> | |
252 | lct_data.tid); | |
253 | msg->body[0] = cpu_to_le32(media_id); | |
1da177e4 LT |
254 | osm_debug("Unlocking...\n"); |
255 | ||
a1a5ea70 | 256 | return i2o_msg_post_wait(dev->iop, msg, 2); |
1da177e4 LT |
257 | }; |
258 | ||
259 | /** | |
260 | * i2o_block_device_power - Power management for device dev | |
261 | * @dev: I2O device which should receive the power management request | |
d9489fb6 | 262 | * @op: Operation to send |
1da177e4 LT |
263 | * |
264 | * Send a power management request to the device dev. | |
265 | * | |
266 | * Returns 0 on success or negative error code on failure. | |
267 | */ | |
268 | static int i2o_block_device_power(struct i2o_block_device *dev, u8 op) | |
269 | { | |
270 | struct i2o_device *i2o_dev = dev->i2o_dev; | |
271 | struct i2o_controller *c = i2o_dev->iop; | |
a1a5ea70 | 272 | struct i2o_message *msg; |
1da177e4 LT |
273 | int rc; |
274 | ||
a1a5ea70 ML |
275 | msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
276 | if (IS_ERR(msg)) | |
277 | return PTR_ERR(msg); | |
1da177e4 | 278 | |
a1a5ea70 ML |
279 | msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0); |
280 | msg->u.head[1] = | |
281 | cpu_to_le32(I2O_CMD_BLOCK_POWER << 24 | HOST_TID << 12 | i2o_dev-> | |
282 | lct_data.tid); | |
283 | msg->body[0] = cpu_to_le32(op << 24); | |
1da177e4 LT |
284 | osm_debug("Power...\n"); |
285 | ||
a1a5ea70 | 286 | rc = i2o_msg_post_wait(c, msg, 60); |
1da177e4 LT |
287 | if (!rc) |
288 | dev->power = op; | |
289 | ||
290 | return rc; | |
291 | }; | |
292 | ||
293 | /** | |
294 | * i2o_block_request_alloc - Allocate an I2O block request struct | |
295 | * | |
296 | * Allocates an I2O block request struct and initialize the list. | |
297 | * | |
298 | * Returns a i2o_block_request pointer on success or negative error code | |
299 | * on failure. | |
300 | */ | |
301 | static inline struct i2o_block_request *i2o_block_request_alloc(void) | |
302 | { | |
303 | struct i2o_block_request *ireq; | |
304 | ||
305 | ireq = mempool_alloc(i2o_blk_req_pool.pool, GFP_ATOMIC); | |
306 | if (!ireq) | |
307 | return ERR_PTR(-ENOMEM); | |
308 | ||
309 | INIT_LIST_HEAD(&ireq->queue); | |
310 | ||
311 | return ireq; | |
312 | }; | |
313 | ||
314 | /** | |
315 | * i2o_block_request_free - Frees a I2O block request | |
316 | * @ireq: I2O block request which should be freed | |
317 | * | |
d9489fb6 | 318 | * Frees the allocated memory (give it back to the request mempool). |
1da177e4 LT |
319 | */ |
320 | static inline void i2o_block_request_free(struct i2o_block_request *ireq) | |
321 | { | |
322 | mempool_free(ireq, i2o_blk_req_pool.pool); | |
323 | }; | |
324 | ||
325 | /** | |
326 | * i2o_block_sglist_alloc - Allocate the SG list and map it | |
f10378ff | 327 | * @c: I2O controller to which the request belongs |
1da177e4 | 328 | * @ireq: I2O block request |
d9489fb6 | 329 | * @mptr: message body pointer |
1da177e4 | 330 | * |
f10378ff | 331 | * Builds the SG list and map it to be accessable by the controller. |
1da177e4 | 332 | * |
f10378ff | 333 | * Returns 0 on failure or 1 on success. |
1da177e4 | 334 | */ |
f10378ff ML |
335 | static inline int i2o_block_sglist_alloc(struct i2o_controller *c, |
336 | struct i2o_block_request *ireq, | |
a1a5ea70 | 337 | u32 ** mptr) |
1da177e4 | 338 | { |
1da177e4 | 339 | int nents; |
f10378ff | 340 | enum dma_data_direction direction; |
1da177e4 | 341 | |
f10378ff | 342 | ireq->dev = &c->pdev->dev; |
1da177e4 LT |
343 | nents = blk_rq_map_sg(ireq->req->q, ireq->req, ireq->sg_table); |
344 | ||
345 | if (rq_data_dir(ireq->req) == READ) | |
f10378ff | 346 | direction = PCI_DMA_FROMDEVICE; |
1da177e4 | 347 | else |
f10378ff | 348 | direction = PCI_DMA_TODEVICE; |
1da177e4 | 349 | |
f10378ff | 350 | ireq->sg_nents = nents; |
1da177e4 | 351 | |
f10378ff | 352 | return i2o_dma_map_sg(c, ireq->sg_table, nents, direction, mptr); |
1da177e4 LT |
353 | }; |
354 | ||
355 | /** | |
356 | * i2o_block_sglist_free - Frees the SG list | |
357 | * @ireq: I2O block request from which the SG should be freed | |
358 | * | |
359 | * Frees the SG list from the I2O block request. | |
360 | */ | |
361 | static inline void i2o_block_sglist_free(struct i2o_block_request *ireq) | |
362 | { | |
f10378ff | 363 | enum dma_data_direction direction; |
1da177e4 | 364 | |
f10378ff ML |
365 | if (rq_data_dir(ireq->req) == READ) |
366 | direction = PCI_DMA_FROMDEVICE; | |
367 | else | |
368 | direction = PCI_DMA_TODEVICE; | |
369 | ||
370 | dma_unmap_sg(ireq->dev, ireq->sg_table, ireq->sg_nents, direction); | |
1da177e4 LT |
371 | }; |
372 | ||
373 | /** | |
374 | * i2o_block_prep_req_fn - Allocates I2O block device specific struct | |
375 | * @q: request queue for the request | |
376 | * @req: the request to prepare | |
377 | * | |
378 | * Allocate the necessary i2o_block_request struct and connect it to | |
379 | * the request. This is needed that we not loose the SG list later on. | |
380 | * | |
381 | * Returns BLKPREP_OK on success or BLKPREP_DEFER on failure. | |
382 | */ | |
383 | static int i2o_block_prep_req_fn(struct request_queue *q, struct request *req) | |
384 | { | |
385 | struct i2o_block_device *i2o_blk_dev = q->queuedata; | |
386 | struct i2o_block_request *ireq; | |
387 | ||
f10378ff ML |
388 | if (unlikely(!i2o_blk_dev)) { |
389 | osm_err("block device already removed\n"); | |
390 | return BLKPREP_KILL; | |
391 | } | |
392 | ||
1da177e4 | 393 | /* request is already processed by us, so return */ |
4aff5e23 | 394 | if (blk_special_request(req)) { |
1da177e4 | 395 | osm_debug("REQ_SPECIAL already set!\n"); |
4aff5e23 | 396 | req->cmd_flags |= REQ_DONTPREP; |
1da177e4 LT |
397 | return BLKPREP_OK; |
398 | } | |
399 | ||
400 | /* connect the i2o_block_request to the request */ | |
401 | if (!req->special) { | |
402 | ireq = i2o_block_request_alloc(); | |
403 | if (unlikely(IS_ERR(ireq))) { | |
404 | osm_debug("unable to allocate i2o_block_request!\n"); | |
405 | return BLKPREP_DEFER; | |
406 | } | |
407 | ||
408 | ireq->i2o_blk_dev = i2o_blk_dev; | |
409 | req->special = ireq; | |
410 | ireq->req = req; | |
411 | } else | |
412 | ireq = req->special; | |
413 | ||
414 | /* do not come back here */ | |
4aff5e23 JA |
415 | req->cmd_type = REQ_TYPE_SPECIAL; |
416 | req->cmd_flags |= REQ_DONTPREP; | |
1da177e4 LT |
417 | |
418 | return BLKPREP_OK; | |
419 | }; | |
420 | ||
421 | /** | |
422 | * i2o_block_delayed_request_fn - delayed request queue function | |
c4028958 | 423 | * @work: the delayed request with the queue to start |
1da177e4 LT |
424 | * |
425 | * If the request queue is stopped for a disk, and there is no open | |
426 | * request, a new event is created, which calls this function to start | |
427 | * the queue after I2O_BLOCK_REQUEST_TIME. Otherwise the queue will never | |
428 | * be started again. | |
429 | */ | |
c4028958 | 430 | static void i2o_block_delayed_request_fn(struct work_struct *work) |
1da177e4 | 431 | { |
c4028958 DH |
432 | struct i2o_block_delayed_request *dreq = |
433 | container_of(work, struct i2o_block_delayed_request, | |
434 | work.work); | |
1da177e4 LT |
435 | struct request_queue *q = dreq->queue; |
436 | unsigned long flags; | |
437 | ||
438 | spin_lock_irqsave(q->queue_lock, flags); | |
439 | blk_start_queue(q); | |
440 | spin_unlock_irqrestore(q->queue_lock, flags); | |
441 | kfree(dreq); | |
442 | }; | |
443 | ||
444 | /** | |
f88e119c ML |
445 | * i2o_block_end_request - Post-processing of completed commands |
446 | * @req: request which should be completed | |
447 | * @uptodate: 1 for success, 0 for I/O error, < 0 for specific error | |
448 | * @nr_bytes: number of bytes to complete | |
1da177e4 | 449 | * |
f88e119c | 450 | * Mark the request as complete. The lock must not be held when entering. |
1da177e4 LT |
451 | * |
452 | */ | |
f88e119c ML |
453 | static void i2o_block_end_request(struct request *req, int uptodate, |
454 | int nr_bytes) | |
1da177e4 | 455 | { |
f88e119c ML |
456 | struct i2o_block_request *ireq = req->special; |
457 | struct i2o_block_device *dev = ireq->i2o_blk_dev; | |
f10378ff | 458 | request_queue_t *q = req->q; |
1da177e4 LT |
459 | unsigned long flags; |
460 | ||
f88e119c | 461 | if (end_that_request_chunk(req, uptodate, nr_bytes)) { |
f10378ff | 462 | int leftover = (req->hard_nr_sectors << KERNEL_SECTOR_SHIFT); |
1da177e4 | 463 | |
f88e119c ML |
464 | if (blk_pc_request(req)) |
465 | leftover = req->data_len; | |
1da177e4 | 466 | |
f88e119c ML |
467 | if (end_io_error(uptodate)) |
468 | end_that_request_chunk(req, 0, leftover); | |
469 | } | |
1da177e4 | 470 | |
f88e119c | 471 | add_disk_randomness(req->rq_disk); |
1da177e4 | 472 | |
f88e119c | 473 | spin_lock_irqsave(q->queue_lock, flags); |
1da177e4 | 474 | |
8ffdc655 | 475 | end_that_request_last(req, uptodate); |
f10378ff ML |
476 | |
477 | if (likely(dev)) { | |
478 | dev->open_queue_depth--; | |
479 | list_del(&ireq->queue); | |
480 | } | |
1da177e4 | 481 | |
f88e119c | 482 | blk_start_queue(q); |
1da177e4 | 483 | |
f88e119c | 484 | spin_unlock_irqrestore(q->queue_lock, flags); |
1da177e4 | 485 | |
f88e119c ML |
486 | i2o_block_sglist_free(ireq); |
487 | i2o_block_request_free(ireq); | |
488 | }; | |
1da177e4 | 489 | |
f88e119c ML |
490 | /** |
491 | * i2o_block_reply - Block OSM reply handler. | |
492 | * @c: I2O controller from which the message arrives | |
493 | * @m: message id of reply | |
d9489fb6 | 494 | * @msg: the actual I2O message reply |
f88e119c ML |
495 | * |
496 | * This function gets all the message replies. | |
497 | * | |
498 | */ | |
499 | static int i2o_block_reply(struct i2o_controller *c, u32 m, | |
500 | struct i2o_message *msg) | |
501 | { | |
502 | struct request *req; | |
503 | int uptodate = 1; | |
1da177e4 LT |
504 | |
505 | req = i2o_cntxt_list_get(c, le32_to_cpu(msg->u.s.tcntxt)); | |
506 | if (unlikely(!req)) { | |
507 | osm_err("NULL reply received!\n"); | |
508 | return -1; | |
509 | } | |
510 | ||
1da177e4 LT |
511 | /* |
512 | * Lets see what is cooking. We stuffed the | |
513 | * request in the context. | |
514 | */ | |
515 | ||
f88e119c ML |
516 | if ((le32_to_cpu(msg->body[0]) >> 24) != 0) { |
517 | u32 status = le32_to_cpu(msg->body[0]); | |
1da177e4 LT |
518 | /* |
519 | * Device not ready means two things. One is that the | |
520 | * the thing went offline (but not a removal media) | |
521 | * | |
522 | * The second is that you have a SuperTrak 100 and the | |
523 | * firmware got constipated. Unlike standard i2o card | |
524 | * setups the supertrak returns an error rather than | |
525 | * blocking for the timeout in these cases. | |
526 | * | |
527 | * Don't stick a supertrak100 into cache aggressive modes | |
528 | */ | |
529 | ||
f10378ff ML |
530 | osm_err("TID %03x error status: 0x%02x, detailed status: " |
531 | "0x%04x\n", (le32_to_cpu(msg->u.head[1]) >> 12 & 0xfff), | |
f88e119c | 532 | status >> 24, status & 0xffff); |
1da177e4 | 533 | |
f88e119c | 534 | req->errors++; |
1da177e4 | 535 | |
f88e119c ML |
536 | uptodate = 0; |
537 | } | |
1da177e4 | 538 | |
f88e119c | 539 | i2o_block_end_request(req, uptodate, le32_to_cpu(msg->body[1])); |
1da177e4 LT |
540 | |
541 | return 1; | |
542 | }; | |
543 | ||
c4028958 | 544 | static void i2o_block_event(struct work_struct *work) |
1da177e4 | 545 | { |
c4028958 | 546 | struct i2o_event *evt = container_of(work, struct i2o_event, work); |
9e87545f | 547 | osm_debug("event received\n"); |
223230e7 | 548 | kfree(evt); |
1da177e4 LT |
549 | }; |
550 | ||
551 | /* | |
552 | * SCSI-CAM for ioctl geometry mapping | |
553 | * Duplicated with SCSI - this should be moved into somewhere common | |
554 | * perhaps genhd ? | |
555 | * | |
556 | * LBA -> CHS mapping table taken from: | |
557 | * | |
558 | * "Incorporating the I2O Architecture into BIOS for Intel Architecture | |
559 | * Platforms" | |
560 | * | |
561 | * This is an I2O document that is only available to I2O members, | |
562 | * not developers. | |
563 | * | |
564 | * From my understanding, this is how all the I2O cards do this | |
565 | * | |
566 | * Disk Size | Sectors | Heads | Cylinders | |
567 | * ---------------+---------+-------+------------------- | |
568 | * 1 < X <= 528M | 63 | 16 | X/(63 * 16 * 512) | |
569 | * 528M < X <= 1G | 63 | 32 | X/(63 * 32 * 512) | |
570 | * 1 < X <528M | 63 | 16 | X/(63 * 16 * 512) | |
571 | * 1 < X <528M | 63 | 16 | X/(63 * 16 * 512) | |
572 | * | |
573 | */ | |
574 | #define BLOCK_SIZE_528M 1081344 | |
575 | #define BLOCK_SIZE_1G 2097152 | |
576 | #define BLOCK_SIZE_21G 4403200 | |
577 | #define BLOCK_SIZE_42G 8806400 | |
578 | #define BLOCK_SIZE_84G 17612800 | |
579 | ||
580 | static void i2o_block_biosparam(unsigned long capacity, unsigned short *cyls, | |
581 | unsigned char *hds, unsigned char *secs) | |
582 | { | |
583 | unsigned long heads, sectors, cylinders; | |
584 | ||
585 | sectors = 63L; /* Maximize sectors per track */ | |
586 | if (capacity <= BLOCK_SIZE_528M) | |
587 | heads = 16; | |
588 | else if (capacity <= BLOCK_SIZE_1G) | |
589 | heads = 32; | |
590 | else if (capacity <= BLOCK_SIZE_21G) | |
591 | heads = 64; | |
592 | else if (capacity <= BLOCK_SIZE_42G) | |
593 | heads = 128; | |
594 | else | |
595 | heads = 255; | |
596 | ||
597 | cylinders = (unsigned long)capacity / (heads * sectors); | |
598 | ||
599 | *cyls = (unsigned short)cylinders; /* Stuff return values */ | |
600 | *secs = (unsigned char)sectors; | |
601 | *hds = (unsigned char)heads; | |
602 | } | |
603 | ||
604 | /** | |
605 | * i2o_block_open - Open the block device | |
d9489fb6 RD |
606 | * @inode: inode for block device being opened |
607 | * @file: file to open | |
1da177e4 LT |
608 | * |
609 | * Power up the device, mount and lock the media. This function is called, | |
610 | * if the block device is opened for access. | |
611 | * | |
612 | * Returns 0 on success or negative error code on failure. | |
613 | */ | |
614 | static int i2o_block_open(struct inode *inode, struct file *file) | |
615 | { | |
616 | struct i2o_block_device *dev = inode->i_bdev->bd_disk->private_data; | |
617 | ||
618 | if (!dev->i2o_dev) | |
619 | return -ENODEV; | |
620 | ||
621 | if (dev->power > 0x1f) | |
622 | i2o_block_device_power(dev, 0x02); | |
623 | ||
624 | i2o_block_device_mount(dev->i2o_dev, -1); | |
625 | ||
626 | i2o_block_device_lock(dev->i2o_dev, -1); | |
627 | ||
628 | osm_debug("Ready.\n"); | |
629 | ||
630 | return 0; | |
631 | }; | |
632 | ||
633 | /** | |
634 | * i2o_block_release - Release the I2O block device | |
d9489fb6 RD |
635 | * @inode: inode for block device being released |
636 | * @file: file to close | |
1da177e4 LT |
637 | * |
638 | * Unlock and unmount the media, and power down the device. Gets called if | |
639 | * the block device is closed. | |
640 | * | |
641 | * Returns 0 on success or negative error code on failure. | |
642 | */ | |
643 | static int i2o_block_release(struct inode *inode, struct file *file) | |
644 | { | |
645 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
646 | struct i2o_block_device *dev = disk->private_data; | |
647 | u8 operation; | |
648 | ||
649 | /* | |
650 | * This is to deail with the case of an application | |
651 | * opening a device and then the device dissapears while | |
652 | * it's in use, and then the application tries to release | |
653 | * it. ex: Unmounting a deleted RAID volume at reboot. | |
654 | * If we send messages, it will just cause FAILs since | |
655 | * the TID no longer exists. | |
656 | */ | |
657 | if (!dev->i2o_dev) | |
658 | return 0; | |
659 | ||
660 | i2o_block_device_flush(dev->i2o_dev); | |
661 | ||
662 | i2o_block_device_unlock(dev->i2o_dev, -1); | |
663 | ||
664 | if (dev->flags & (1 << 3 | 1 << 4)) /* Removable */ | |
665 | operation = 0x21; | |
666 | else | |
667 | operation = 0x24; | |
668 | ||
669 | i2o_block_device_power(dev, operation); | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
a885c8c4 CH |
674 | static int i2o_block_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
675 | { | |
676 | i2o_block_biosparam(get_capacity(bdev->bd_disk), | |
677 | &geo->cylinders, &geo->heads, &geo->sectors); | |
678 | return 0; | |
679 | } | |
680 | ||
1da177e4 LT |
681 | /** |
682 | * i2o_block_ioctl - Issue device specific ioctl calls. | |
d9489fb6 RD |
683 | * @inode: inode for block device ioctl |
684 | * @file: file for ioctl | |
1da177e4 LT |
685 | * @cmd: ioctl command |
686 | * @arg: arg | |
687 | * | |
688 | * Handles ioctl request for the block device. | |
689 | * | |
690 | * Return 0 on success or negative error on failure. | |
691 | */ | |
692 | static int i2o_block_ioctl(struct inode *inode, struct file *file, | |
693 | unsigned int cmd, unsigned long arg) | |
694 | { | |
695 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
696 | struct i2o_block_device *dev = disk->private_data; | |
1da177e4 LT |
697 | |
698 | /* Anyone capable of this syscall can do *real bad* things */ | |
699 | ||
700 | if (!capable(CAP_SYS_ADMIN)) | |
701 | return -EPERM; | |
702 | ||
703 | switch (cmd) { | |
1da177e4 LT |
704 | case BLKI2OGRSTRAT: |
705 | return put_user(dev->rcache, (int __user *)arg); | |
706 | case BLKI2OGWSTRAT: | |
707 | return put_user(dev->wcache, (int __user *)arg); | |
708 | case BLKI2OSRSTRAT: | |
709 | if (arg < 0 || arg > CACHE_SMARTFETCH) | |
710 | return -EINVAL; | |
711 | dev->rcache = arg; | |
712 | break; | |
713 | case BLKI2OSWSTRAT: | |
714 | if (arg != 0 | |
715 | && (arg < CACHE_WRITETHROUGH || arg > CACHE_SMARTBACK)) | |
716 | return -EINVAL; | |
717 | dev->wcache = arg; | |
718 | break; | |
719 | } | |
720 | return -ENOTTY; | |
721 | }; | |
722 | ||
723 | /** | |
724 | * i2o_block_media_changed - Have we seen a media change? | |
725 | * @disk: gendisk which should be verified | |
726 | * | |
727 | * Verifies if the media has changed. | |
728 | * | |
729 | * Returns 1 if the media was changed or 0 otherwise. | |
730 | */ | |
731 | static int i2o_block_media_changed(struct gendisk *disk) | |
732 | { | |
733 | struct i2o_block_device *p = disk->private_data; | |
734 | ||
735 | if (p->media_change_flag) { | |
736 | p->media_change_flag = 0; | |
737 | return 1; | |
738 | } | |
739 | return 0; | |
740 | } | |
741 | ||
742 | /** | |
743 | * i2o_block_transfer - Transfer a request to/from the I2O controller | |
744 | * @req: the request which should be transfered | |
745 | * | |
746 | * This function converts the request into a I2O message. The necessary | |
747 | * DMA buffers are allocated and after everything is setup post the message | |
748 | * to the I2O controller. No cleanup is done by this function. It is done | |
749 | * on the interrupt side when the reply arrives. | |
750 | * | |
751 | * Return 0 on success or negative error code on failure. | |
752 | */ | |
753 | static int i2o_block_transfer(struct request *req) | |
754 | { | |
755 | struct i2o_block_device *dev = req->rq_disk->private_data; | |
f10378ff | 756 | struct i2o_controller *c; |
1da177e4 | 757 | int tid = dev->i2o_dev->lct_data.tid; |
a1a5ea70 ML |
758 | struct i2o_message *msg; |
759 | u32 *mptr; | |
1da177e4 | 760 | struct i2o_block_request *ireq = req->special; |
1da177e4 | 761 | u32 tcntxt; |
f10378ff ML |
762 | u32 sgl_offset = SGL_OFFSET_8; |
763 | u32 ctl_flags = 0x00000000; | |
1da177e4 | 764 | int rc; |
f10378ff ML |
765 | u32 cmd; |
766 | ||
767 | if (unlikely(!dev->i2o_dev)) { | |
768 | osm_err("transfer to removed drive\n"); | |
769 | rc = -ENODEV; | |
770 | goto exit; | |
771 | } | |
772 | ||
773 | c = dev->i2o_dev->iop; | |
1da177e4 | 774 | |
a1a5ea70 ML |
775 | msg = i2o_msg_get(c); |
776 | if (IS_ERR(msg)) { | |
777 | rc = PTR_ERR(msg); | |
1da177e4 LT |
778 | goto exit; |
779 | } | |
780 | ||
781 | tcntxt = i2o_cntxt_list_add(c, req); | |
782 | if (!tcntxt) { | |
783 | rc = -ENOMEM; | |
784 | goto nop_msg; | |
785 | } | |
786 | ||
a1a5ea70 ML |
787 | msg->u.s.icntxt = cpu_to_le32(i2o_block_driver.context); |
788 | msg->u.s.tcntxt = cpu_to_le32(tcntxt); | |
1da177e4 | 789 | |
f10378ff | 790 | mptr = &msg->body[0]; |
1da177e4 LT |
791 | |
792 | if (rq_data_dir(req) == READ) { | |
f10378ff ML |
793 | cmd = I2O_CMD_BLOCK_READ << 24; |
794 | ||
1da177e4 | 795 | switch (dev->rcache) { |
1da177e4 | 796 | case CACHE_PREFETCH: |
f10378ff | 797 | ctl_flags = 0x201F0008; |
1da177e4 | 798 | break; |
f10378ff | 799 | |
1da177e4 LT |
800 | case CACHE_SMARTFETCH: |
801 | if (req->nr_sectors > 16) | |
f10378ff | 802 | ctl_flags = 0x201F0008; |
1da177e4 | 803 | else |
f10378ff ML |
804 | ctl_flags = 0x001F0000; |
805 | break; | |
806 | ||
807 | default: | |
1da177e4 LT |
808 | break; |
809 | } | |
810 | } else { | |
f10378ff ML |
811 | cmd = I2O_CMD_BLOCK_WRITE << 24; |
812 | ||
1da177e4 | 813 | switch (dev->wcache) { |
1da177e4 | 814 | case CACHE_WRITETHROUGH: |
f10378ff | 815 | ctl_flags = 0x001F0008; |
1da177e4 LT |
816 | break; |
817 | case CACHE_WRITEBACK: | |
f10378ff | 818 | ctl_flags = 0x001F0010; |
1da177e4 LT |
819 | break; |
820 | case CACHE_SMARTBACK: | |
821 | if (req->nr_sectors > 16) | |
f10378ff | 822 | ctl_flags = 0x001F0004; |
1da177e4 | 823 | else |
f10378ff | 824 | ctl_flags = 0x001F0010; |
1da177e4 LT |
825 | break; |
826 | case CACHE_SMARTTHROUGH: | |
827 | if (req->nr_sectors > 16) | |
f10378ff | 828 | ctl_flags = 0x001F0004; |
1da177e4 | 829 | else |
f10378ff ML |
830 | ctl_flags = 0x001F0010; |
831 | default: | |
832 | break; | |
833 | } | |
834 | } | |
835 | ||
836 | #ifdef CONFIG_I2O_EXT_ADAPTEC | |
837 | if (c->adaptec) { | |
838 | u8 cmd[10]; | |
839 | u32 scsi_flags; | |
840 | u16 hwsec = queue_hardsect_size(req->q) >> KERNEL_SECTOR_SHIFT; | |
841 | ||
842 | memset(cmd, 0, 10); | |
843 | ||
844 | sgl_offset = SGL_OFFSET_12; | |
845 | ||
a1a5ea70 ML |
846 | msg->u.head[1] = |
847 | cpu_to_le32(I2O_CMD_PRIVATE << 24 | HOST_TID << 12 | tid); | |
f10378ff | 848 | |
a1a5ea70 ML |
849 | *mptr++ = cpu_to_le32(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC); |
850 | *mptr++ = cpu_to_le32(tid); | |
f10378ff ML |
851 | |
852 | /* | |
853 | * ENABLE_DISCONNECT | |
854 | * SIMPLE_TAG | |
855 | * RETURN_SENSE_DATA_IN_REPLY_MESSAGE_FRAME | |
856 | */ | |
857 | if (rq_data_dir(req) == READ) { | |
2e1973a3 | 858 | cmd[0] = READ_10; |
f10378ff ML |
859 | scsi_flags = 0x60a0000a; |
860 | } else { | |
2e1973a3 | 861 | cmd[0] = WRITE_10; |
f10378ff | 862 | scsi_flags = 0xa0a0000a; |
1da177e4 | 863 | } |
f10378ff | 864 | |
a1a5ea70 | 865 | *mptr++ = cpu_to_le32(scsi_flags); |
f10378ff ML |
866 | |
867 | *((u32 *) & cmd[2]) = cpu_to_be32(req->sector * hwsec); | |
868 | *((u16 *) & cmd[7]) = cpu_to_be16(req->nr_sectors * hwsec); | |
869 | ||
a1a5ea70 | 870 | memcpy(mptr, cmd, 10); |
f10378ff | 871 | mptr += 4; |
a1a5ea70 | 872 | *mptr++ = cpu_to_le32(req->nr_sectors << KERNEL_SECTOR_SHIFT); |
f10378ff ML |
873 | } else |
874 | #endif | |
875 | { | |
a1a5ea70 ML |
876 | msg->u.head[1] = cpu_to_le32(cmd | HOST_TID << 12 | tid); |
877 | *mptr++ = cpu_to_le32(ctl_flags); | |
878 | *mptr++ = cpu_to_le32(req->nr_sectors << KERNEL_SECTOR_SHIFT); | |
879 | *mptr++ = | |
880 | cpu_to_le32((u32) (req->sector << KERNEL_SECTOR_SHIFT)); | |
881 | *mptr++ = | |
882 | cpu_to_le32(req->sector >> (32 - KERNEL_SECTOR_SHIFT)); | |
1da177e4 LT |
883 | } |
884 | ||
f10378ff ML |
885 | if (!i2o_block_sglist_alloc(c, ireq, &mptr)) { |
886 | rc = -ENOMEM; | |
887 | goto context_remove; | |
1da177e4 LT |
888 | } |
889 | ||
a1a5ea70 ML |
890 | msg->u.head[0] = |
891 | cpu_to_le32(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) | sgl_offset); | |
1da177e4 LT |
892 | |
893 | list_add_tail(&ireq->queue, &dev->open_queue); | |
894 | dev->open_queue_depth++; | |
895 | ||
a1a5ea70 | 896 | i2o_msg_post(c, msg); |
1da177e4 LT |
897 | |
898 | return 0; | |
899 | ||
900 | context_remove: | |
901 | i2o_cntxt_list_remove(c, req); | |
902 | ||
903 | nop_msg: | |
a1a5ea70 | 904 | i2o_msg_nop(c, msg); |
1da177e4 LT |
905 | |
906 | exit: | |
907 | return rc; | |
908 | }; | |
909 | ||
910 | /** | |
911 | * i2o_block_request_fn - request queue handling function | |
d9489fb6 | 912 | * @q: request queue from which the request could be fetched |
1da177e4 LT |
913 | * |
914 | * Takes the next request from the queue, transfers it and if no error | |
915 | * occurs dequeue it from the queue. On arrival of the reply the message | |
916 | * will be processed further. If an error occurs requeue the request. | |
917 | */ | |
918 | static void i2o_block_request_fn(struct request_queue *q) | |
919 | { | |
920 | struct request *req; | |
921 | ||
922 | while (!blk_queue_plugged(q)) { | |
923 | req = elv_next_request(q); | |
924 | if (!req) | |
925 | break; | |
926 | ||
927 | if (blk_fs_request(req)) { | |
928 | struct i2o_block_delayed_request *dreq; | |
929 | struct i2o_block_request *ireq = req->special; | |
930 | unsigned int queue_depth; | |
931 | ||
932 | queue_depth = ireq->i2o_blk_dev->open_queue_depth; | |
933 | ||
f10378ff | 934 | if (queue_depth < I2O_BLOCK_MAX_OPEN_REQUESTS) { |
1da177e4 LT |
935 | if (!i2o_block_transfer(req)) { |
936 | blkdev_dequeue_request(req); | |
937 | continue; | |
f10378ff ML |
938 | } else |
939 | osm_info("transfer error\n"); | |
940 | } | |
1da177e4 LT |
941 | |
942 | if (queue_depth) | |
943 | break; | |
944 | ||
945 | /* stop the queue and retry later */ | |
946 | dreq = kmalloc(sizeof(*dreq), GFP_ATOMIC); | |
947 | if (!dreq) | |
948 | continue; | |
949 | ||
950 | dreq->queue = q; | |
c4028958 DH |
951 | INIT_DELAYED_WORK(&dreq->work, |
952 | i2o_block_delayed_request_fn); | |
1da177e4 | 953 | |
1da177e4 LT |
954 | if (!queue_delayed_work(i2o_block_driver.event_queue, |
955 | &dreq->work, | |
956 | I2O_BLOCK_RETRY_TIME)) | |
957 | kfree(dreq); | |
958 | else { | |
959 | blk_stop_queue(q); | |
960 | break; | |
961 | } | |
962 | } else | |
963 | end_request(req, 0); | |
964 | } | |
965 | }; | |
966 | ||
967 | /* I2O Block device operations definition */ | |
968 | static struct block_device_operations i2o_block_fops = { | |
969 | .owner = THIS_MODULE, | |
970 | .open = i2o_block_open, | |
971 | .release = i2o_block_release, | |
972 | .ioctl = i2o_block_ioctl, | |
a885c8c4 | 973 | .getgeo = i2o_block_getgeo, |
1da177e4 LT |
974 | .media_changed = i2o_block_media_changed |
975 | }; | |
976 | ||
977 | /** | |
978 | * i2o_block_device_alloc - Allocate memory for a I2O Block device | |
979 | * | |
980 | * Allocate memory for the i2o_block_device struct, gendisk and request | |
981 | * queue and initialize them as far as no additional information is needed. | |
982 | * | |
983 | * Returns a pointer to the allocated I2O Block device on succes or a | |
984 | * negative error code on failure. | |
985 | */ | |
986 | static struct i2o_block_device *i2o_block_device_alloc(void) | |
987 | { | |
988 | struct i2o_block_device *dev; | |
989 | struct gendisk *gd; | |
990 | struct request_queue *queue; | |
991 | int rc; | |
992 | ||
f6ed39a6 | 993 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
1da177e4 LT |
994 | if (!dev) { |
995 | osm_err("Insufficient memory to allocate I2O Block disk.\n"); | |
996 | rc = -ENOMEM; | |
997 | goto exit; | |
998 | } | |
1da177e4 LT |
999 | |
1000 | INIT_LIST_HEAD(&dev->open_queue); | |
1001 | spin_lock_init(&dev->lock); | |
1002 | dev->rcache = CACHE_PREFETCH; | |
1003 | dev->wcache = CACHE_WRITEBACK; | |
1004 | ||
1005 | /* allocate a gendisk with 16 partitions */ | |
1006 | gd = alloc_disk(16); | |
1007 | if (!gd) { | |
1008 | osm_err("Insufficient memory to allocate gendisk.\n"); | |
1009 | rc = -ENOMEM; | |
1010 | goto cleanup_dev; | |
1011 | } | |
1012 | ||
1013 | /* initialize the request queue */ | |
1014 | queue = blk_init_queue(i2o_block_request_fn, &dev->lock); | |
1015 | if (!queue) { | |
1016 | osm_err("Insufficient memory to allocate request queue.\n"); | |
1017 | rc = -ENOMEM; | |
1018 | goto cleanup_queue; | |
1019 | } | |
1020 | ||
1021 | blk_queue_prep_rq(queue, i2o_block_prep_req_fn); | |
f10378ff | 1022 | blk_queue_issue_flush_fn(queue, i2o_block_issue_flush); |
1da177e4 LT |
1023 | |
1024 | gd->major = I2O_MAJOR; | |
1025 | gd->queue = queue; | |
1026 | gd->fops = &i2o_block_fops; | |
1027 | gd->private_data = dev; | |
1028 | ||
1029 | dev->gd = gd; | |
1030 | ||
1031 | return dev; | |
1032 | ||
1033 | cleanup_queue: | |
1034 | put_disk(gd); | |
1035 | ||
1036 | cleanup_dev: | |
1037 | kfree(dev); | |
1038 | ||
1039 | exit: | |
1040 | return ERR_PTR(rc); | |
1041 | }; | |
1042 | ||
1043 | /** | |
1044 | * i2o_block_probe - verify if dev is a I2O Block device and install it | |
1045 | * @dev: device to verify if it is a I2O Block device | |
1046 | * | |
1047 | * We only verify if the user_tid of the device is 0xfff and then install | |
1048 | * the device. Otherwise it is used by some other device (e. g. RAID). | |
1049 | * | |
1050 | * Returns 0 on success or negative error code on failure. | |
1051 | */ | |
1052 | static int i2o_block_probe(struct device *dev) | |
1053 | { | |
1054 | struct i2o_device *i2o_dev = to_i2o_device(dev); | |
1da177e4 | 1055 | struct i2o_controller *c = i2o_dev->iop; |
f33213ec | 1056 | struct i2o_block_device *i2o_blk_dev; |
1da177e4 LT |
1057 | struct gendisk *gd; |
1058 | struct request_queue *queue; | |
1059 | static int unit = 0; | |
1060 | int rc; | |
1061 | u64 size; | |
1062 | u32 blocksize; | |
f10378ff | 1063 | u16 body_size = 4; |
793fd15d | 1064 | u16 power; |
f10378ff ML |
1065 | unsigned short max_sectors; |
1066 | ||
1067 | #ifdef CONFIG_I2O_EXT_ADAPTEC | |
1068 | if (c->adaptec) | |
1069 | body_size = 8; | |
1070 | #endif | |
1071 | ||
1072 | if (c->limit_sectors) | |
1073 | max_sectors = I2O_MAX_SECTORS_LIMITED; | |
1074 | else | |
1075 | max_sectors = I2O_MAX_SECTORS; | |
1da177e4 LT |
1076 | |
1077 | /* skip devices which are used by IOP */ | |
1078 | if (i2o_dev->lct_data.user_tid != 0xfff) { | |
1079 | osm_debug("skipping used device %03x\n", i2o_dev->lct_data.tid); | |
1080 | return -ENODEV; | |
1081 | } | |
1082 | ||
1da177e4 LT |
1083 | if (i2o_device_claim(i2o_dev)) { |
1084 | osm_warn("Unable to claim device. Installation aborted\n"); | |
1085 | rc = -EFAULT; | |
1086 | goto exit; | |
1087 | } | |
1088 | ||
1089 | i2o_blk_dev = i2o_block_device_alloc(); | |
1090 | if (IS_ERR(i2o_blk_dev)) { | |
1091 | osm_err("could not alloc a new I2O block device"); | |
1092 | rc = PTR_ERR(i2o_blk_dev); | |
1093 | goto claim_release; | |
1094 | } | |
1095 | ||
1096 | i2o_blk_dev->i2o_dev = i2o_dev; | |
1097 | dev_set_drvdata(dev, i2o_blk_dev); | |
1098 | ||
1099 | /* setup gendisk */ | |
1100 | gd = i2o_blk_dev->gd; | |
1101 | gd->first_minor = unit << 4; | |
1102 | sprintf(gd->disk_name, "i2o/hd%c", 'a' + unit); | |
1da177e4 LT |
1103 | gd->driverfs_dev = &i2o_dev->device; |
1104 | ||
1105 | /* setup request queue */ | |
1106 | queue = gd->queue; | |
1107 | queue->queuedata = i2o_blk_dev; | |
1108 | ||
f10378ff ML |
1109 | blk_queue_max_phys_segments(queue, I2O_MAX_PHYS_SEGMENTS); |
1110 | blk_queue_max_sectors(queue, max_sectors); | |
1111 | blk_queue_max_hw_segments(queue, i2o_sg_tablesize(c, body_size)); | |
1da177e4 | 1112 | |
f10378ff ML |
1113 | osm_debug("max sectors = %d\n", queue->max_phys_segments); |
1114 | osm_debug("phys segments = %d\n", queue->max_sectors); | |
1115 | osm_debug("max hw segments = %d\n", queue->max_hw_segments); | |
1da177e4 LT |
1116 | |
1117 | /* | |
1118 | * Ask for the current media data. If that isn't supported | |
1119 | * then we ask for the device capacity data | |
1120 | */ | |
793fd15d ML |
1121 | if (!i2o_parm_field_get(i2o_dev, 0x0004, 1, &blocksize, 4) || |
1122 | !i2o_parm_field_get(i2o_dev, 0x0000, 3, &blocksize, 4)) { | |
1123 | blk_queue_hardsect_size(queue, le32_to_cpu(blocksize)); | |
f10378ff ML |
1124 | } else |
1125 | osm_warn("unable to get blocksize of %s\n", gd->disk_name); | |
1da177e4 | 1126 | |
793fd15d ML |
1127 | if (!i2o_parm_field_get(i2o_dev, 0x0004, 0, &size, 8) || |
1128 | !i2o_parm_field_get(i2o_dev, 0x0000, 4, &size, 8)) { | |
1129 | set_capacity(gd, le64_to_cpu(size) >> KERNEL_SECTOR_SHIFT); | |
f10378ff ML |
1130 | } else |
1131 | osm_warn("could not get size of %s\n", gd->disk_name); | |
f88e119c | 1132 | |
793fd15d ML |
1133 | if (!i2o_parm_field_get(i2o_dev, 0x0000, 2, &power, 2)) |
1134 | i2o_blk_dev->power = power; | |
1da177e4 | 1135 | |
1da177e4 LT |
1136 | i2o_event_register(i2o_dev, &i2o_block_driver, 0, 0xffffffff); |
1137 | ||
1138 | add_disk(gd); | |
1139 | ||
1140 | unit++; | |
1141 | ||
f88e119c ML |
1142 | osm_info("device added (TID: %03x): %s\n", i2o_dev->lct_data.tid, |
1143 | i2o_blk_dev->gd->disk_name); | |
1144 | ||
1da177e4 LT |
1145 | return 0; |
1146 | ||
1147 | claim_release: | |
1148 | i2o_device_claim_release(i2o_dev); | |
1149 | ||
1150 | exit: | |
1151 | return rc; | |
1152 | }; | |
1153 | ||
1154 | /* Block OSM driver struct */ | |
1155 | static struct i2o_driver i2o_block_driver = { | |
1156 | .name = OSM_NAME, | |
1157 | .event = i2o_block_event, | |
1158 | .reply = i2o_block_reply, | |
1159 | .classes = i2o_block_class_id, | |
1160 | .driver = { | |
1161 | .probe = i2o_block_probe, | |
1162 | .remove = i2o_block_remove, | |
1163 | }, | |
1164 | }; | |
1165 | ||
1166 | /** | |
1167 | * i2o_block_init - Block OSM initialization function | |
1168 | * | |
1169 | * Allocate the slab and mempool for request structs, registers i2o_block | |
1170 | * block device and finally register the Block OSM in the I2O core. | |
1171 | * | |
1172 | * Returns 0 on success or negative error code on failure. | |
1173 | */ | |
1174 | static int __init i2o_block_init(void) | |
1175 | { | |
1176 | int rc; | |
1177 | int size; | |
1178 | ||
1179 | printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n"); | |
1180 | ||
1181 | /* Allocate request mempool and slab */ | |
1182 | size = sizeof(struct i2o_block_request); | |
1183 | i2o_blk_req_pool.slab = kmem_cache_create("i2o_block_req", size, 0, | |
1184 | SLAB_HWCACHE_ALIGN, NULL, | |
1185 | NULL); | |
1186 | if (!i2o_blk_req_pool.slab) { | |
1187 | osm_err("can't init request slab\n"); | |
1188 | rc = -ENOMEM; | |
1189 | goto exit; | |
1190 | } | |
1191 | ||
93d2341c MD |
1192 | i2o_blk_req_pool.pool = |
1193 | mempool_create_slab_pool(I2O_BLOCK_REQ_MEMPOOL_SIZE, | |
1194 | i2o_blk_req_pool.slab); | |
1da177e4 LT |
1195 | if (!i2o_blk_req_pool.pool) { |
1196 | osm_err("can't init request mempool\n"); | |
1197 | rc = -ENOMEM; | |
1198 | goto free_slab; | |
1199 | } | |
1200 | ||
1201 | /* Register the block device interfaces */ | |
1202 | rc = register_blkdev(I2O_MAJOR, "i2o_block"); | |
1203 | if (rc) { | |
1204 | osm_err("unable to register block device\n"); | |
1205 | goto free_mempool; | |
1206 | } | |
1207 | #ifdef MODULE | |
1208 | osm_info("registered device at major %d\n", I2O_MAJOR); | |
1209 | #endif | |
1210 | ||
1211 | /* Register Block OSM into I2O core */ | |
1212 | rc = i2o_driver_register(&i2o_block_driver); | |
1213 | if (rc) { | |
1214 | osm_err("Could not register Block driver\n"); | |
1215 | goto unregister_blkdev; | |
1216 | } | |
1217 | ||
1218 | return 0; | |
1219 | ||
1220 | unregister_blkdev: | |
1221 | unregister_blkdev(I2O_MAJOR, "i2o_block"); | |
1222 | ||
1223 | free_mempool: | |
1224 | mempool_destroy(i2o_blk_req_pool.pool); | |
1225 | ||
1226 | free_slab: | |
1227 | kmem_cache_destroy(i2o_blk_req_pool.slab); | |
1228 | ||
1229 | exit: | |
1230 | return rc; | |
1231 | }; | |
1232 | ||
1233 | /** | |
1234 | * i2o_block_exit - Block OSM exit function | |
1235 | * | |
1236 | * Unregisters Block OSM from I2O core, unregisters i2o_block block device | |
1237 | * and frees the mempool and slab. | |
1238 | */ | |
1239 | static void __exit i2o_block_exit(void) | |
1240 | { | |
1241 | /* Unregister I2O Block OSM from I2O core */ | |
1242 | i2o_driver_unregister(&i2o_block_driver); | |
1243 | ||
1244 | /* Unregister block device */ | |
1245 | unregister_blkdev(I2O_MAJOR, "i2o_block"); | |
1246 | ||
1247 | /* Free request mempool and slab */ | |
1248 | mempool_destroy(i2o_blk_req_pool.pool); | |
1249 | kmem_cache_destroy(i2o_blk_req_pool.slab); | |
1250 | }; | |
1251 | ||
1252 | MODULE_AUTHOR("Red Hat"); | |
1253 | MODULE_LICENSE("GPL"); | |
1254 | MODULE_DESCRIPTION(OSM_DESCRIPTION); | |
1255 | MODULE_VERSION(OSM_VERSION); | |
1256 | ||
1257 | module_init(i2o_block_init); | |
1258 | module_exit(i2o_block_exit); |