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1da177e4 LT |
1 | /* |
2 | * | |
3 | * Linux MegaRAID device driver | |
4 | * | |
5 | * Copyright (c) 2003-2004 LSI Logic Corporation. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FILE : megaraid_mm.c | |
0b4972d5 | 13 | * Version : v2.20.2.7 (Jul 16 2006) |
1da177e4 LT |
14 | * |
15 | * Common management module | |
16 | */ | |
e8edc6e0 | 17 | #include <linux/sched.h> |
5a0e3ad6 | 18 | #include <linux/slab.h> |
c45d15d2 | 19 | #include <linux/mutex.h> |
1da177e4 | 20 | #include "megaraid_mm.h" |
1da177e4 LT |
21 | |
22 | ||
23 | // Entry points for char node driver | |
c45d15d2 | 24 | static DEFINE_MUTEX(mraid_mm_mutex); |
1da177e4 | 25 | static int mraid_mm_open(struct inode *, struct file *); |
f4927c45 | 26 | static long mraid_mm_unlocked_ioctl(struct file *, uint, unsigned long); |
1da177e4 LT |
27 | |
28 | ||
29 | // routines to convert to and from the old the format | |
30 | static int mimd_to_kioc(mimd_t __user *, mraid_mmadp_t *, uioc_t *); | |
31 | static int kioc_to_mimd(uioc_t *, mimd_t __user *); | |
32 | ||
33 | ||
34 | // Helper functions | |
35 | static int handle_drvrcmd(void __user *, uint8_t, int *); | |
36 | static int lld_ioctl(mraid_mmadp_t *, uioc_t *); | |
37 | static void ioctl_done(uioc_t *); | |
38 | static void lld_timedout(unsigned long); | |
39 | static void hinfo_to_cinfo(mraid_hba_info_t *, mcontroller_t *); | |
40 | static mraid_mmadp_t *mraid_mm_get_adapter(mimd_t __user *, int *); | |
41 | static uioc_t *mraid_mm_alloc_kioc(mraid_mmadp_t *); | |
42 | static void mraid_mm_dealloc_kioc(mraid_mmadp_t *, uioc_t *); | |
43 | static int mraid_mm_attach_buf(mraid_mmadp_t *, uioc_t *, int); | |
44 | static int mraid_mm_setup_dma_pools(mraid_mmadp_t *); | |
45 | static void mraid_mm_free_adp_resources(mraid_mmadp_t *); | |
46 | static void mraid_mm_teardown_dma_pools(mraid_mmadp_t *); | |
47 | ||
48 | #ifdef CONFIG_COMPAT | |
49 | static long mraid_mm_compat_ioctl(struct file *, unsigned int, unsigned long); | |
50 | #endif | |
51 | ||
52 | MODULE_AUTHOR("LSI Logic Corporation"); | |
53 | MODULE_DESCRIPTION("LSI Logic Management Module"); | |
54 | MODULE_LICENSE("GPL"); | |
55 | MODULE_VERSION(LSI_COMMON_MOD_VERSION); | |
56 | ||
57 | static int dbglevel = CL_ANN; | |
58 | module_param_named(dlevel, dbglevel, int, 0); | |
59 | MODULE_PARM_DESC(dlevel, "Debug level (default=0)"); | |
60 | ||
61 | EXPORT_SYMBOL(mraid_mm_register_adp); | |
62 | EXPORT_SYMBOL(mraid_mm_unregister_adp); | |
63 | EXPORT_SYMBOL(mraid_mm_adapter_app_handle); | |
64 | ||
2a4aa2c4 | 65 | static uint32_t drvr_ver = 0x02200207; |
1da177e4 LT |
66 | |
67 | static int adapters_count_g; | |
68 | static struct list_head adapters_list_g; | |
69 | ||
70 | static wait_queue_head_t wait_q; | |
71 | ||
00977a59 | 72 | static const struct file_operations lsi_fops = { |
1da177e4 | 73 | .open = mraid_mm_open, |
f4927c45 | 74 | .unlocked_ioctl = mraid_mm_unlocked_ioctl, |
1da177e4 LT |
75 | #ifdef CONFIG_COMPAT |
76 | .compat_ioctl = mraid_mm_compat_ioctl, | |
77 | #endif | |
78 | .owner = THIS_MODULE, | |
6038f373 | 79 | .llseek = noop_llseek, |
1da177e4 LT |
80 | }; |
81 | ||
90a95af8 TH |
82 | static struct miscdevice megaraid_mm_dev = { |
83 | .minor = MISC_DYNAMIC_MINOR, | |
84 | .name = "megadev0", | |
85 | .fops = &lsi_fops, | |
86 | }; | |
87 | ||
1da177e4 LT |
88 | /** |
89 | * mraid_mm_open - open routine for char node interface | |
a69b74d3 | 90 | * @inode : unused |
1da177e4 LT |
91 | * @filep : unused |
92 | * | |
a69b74d3 | 93 | * Allow ioctl operations by apps only if they have superuser privilege. |
1da177e4 LT |
94 | */ |
95 | static int | |
96 | mraid_mm_open(struct inode *inode, struct file *filep) | |
97 | { | |
98 | /* | |
99 | * Only allow superuser to access private ioctl interface | |
100 | */ | |
101 | if (!capable(CAP_SYS_ADMIN)) return (-EACCES); | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
106 | /** | |
107 | * mraid_mm_ioctl - module entry-point for ioctls | |
108 | * @inode : inode (ignored) | |
109 | * @filep : file operations pointer (ignored) | |
110 | * @cmd : ioctl command | |
111 | * @arg : user ioctl packet | |
112 | */ | |
113 | static int | |
f4927c45 | 114 | mraid_mm_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
115 | { |
116 | uioc_t *kioc; | |
117 | char signature[EXT_IOCTL_SIGN_SZ] = {0}; | |
118 | int rval; | |
119 | mraid_mmadp_t *adp; | |
120 | uint8_t old_ioctl; | |
121 | int drvrcmd_rval; | |
122 | void __user *argp = (void __user *)arg; | |
123 | ||
124 | /* | |
125 | * Make sure only USCSICMD are issued through this interface. | |
126 | * MIMD application would still fire different command. | |
127 | */ | |
128 | ||
129 | if ((_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD)) { | |
130 | return (-EINVAL); | |
131 | } | |
132 | ||
133 | /* | |
134 | * Look for signature to see if this is the new or old ioctl format. | |
135 | */ | |
136 | if (copy_from_user(signature, argp, EXT_IOCTL_SIGN_SZ)) { | |
137 | con_log(CL_ANN, (KERN_WARNING | |
138 | "megaraid cmm: copy from usr addr failed\n")); | |
139 | return (-EFAULT); | |
140 | } | |
141 | ||
142 | if (memcmp(signature, EXT_IOCTL_SIGN, EXT_IOCTL_SIGN_SZ) == 0) | |
143 | old_ioctl = 0; | |
144 | else | |
145 | old_ioctl = 1; | |
146 | ||
147 | /* | |
148 | * At present, we don't support the new ioctl packet | |
149 | */ | |
150 | if (!old_ioctl ) | |
151 | return (-EINVAL); | |
152 | ||
153 | /* | |
154 | * If it is a driver ioctl (as opposed to fw ioctls), then we can | |
155 | * handle the command locally. rval > 0 means it is not a drvr cmd | |
156 | */ | |
157 | rval = handle_drvrcmd(argp, old_ioctl, &drvrcmd_rval); | |
158 | ||
159 | if (rval < 0) | |
160 | return rval; | |
161 | else if (rval == 0) | |
162 | return drvrcmd_rval; | |
163 | ||
164 | rval = 0; | |
165 | if ((adp = mraid_mm_get_adapter(argp, &rval)) == NULL) { | |
166 | return rval; | |
167 | } | |
168 | ||
169 | /* | |
170 | * Check if adapter can accept ioctl. We may have marked it offline | |
171 | * if any previous kioc had timedout on this controller. | |
172 | */ | |
173 | if (!adp->quiescent) { | |
174 | con_log(CL_ANN, (KERN_WARNING | |
175 | "megaraid cmm: controller cannot accept cmds due to " | |
176 | "earlier errors\n" )); | |
177 | return -EFAULT; | |
178 | } | |
179 | ||
180 | /* | |
181 | * The following call will block till a kioc is available | |
182 | */ | |
183 | kioc = mraid_mm_alloc_kioc(adp); | |
184 | ||
185 | /* | |
186 | * User sent the old mimd_t ioctl packet. Convert it to uioc_t. | |
187 | */ | |
188 | if ((rval = mimd_to_kioc(argp, adp, kioc))) { | |
189 | mraid_mm_dealloc_kioc(adp, kioc); | |
190 | return rval; | |
191 | } | |
192 | ||
193 | kioc->done = ioctl_done; | |
194 | ||
195 | /* | |
196 | * Issue the IOCTL to the low level driver. After the IOCTL completes | |
197 | * release the kioc if and only if it was _not_ timedout. If it was | |
198 | * timedout, that means that resources are still with low level driver. | |
199 | */ | |
200 | if ((rval = lld_ioctl(adp, kioc))) { | |
201 | ||
202 | if (!kioc->timedout) | |
203 | mraid_mm_dealloc_kioc(adp, kioc); | |
204 | ||
205 | return rval; | |
206 | } | |
207 | ||
208 | /* | |
209 | * Convert the kioc back to user space | |
210 | */ | |
211 | rval = kioc_to_mimd(kioc, argp); | |
212 | ||
213 | /* | |
214 | * Return the kioc to free pool | |
215 | */ | |
216 | mraid_mm_dealloc_kioc(adp, kioc); | |
217 | ||
218 | return rval; | |
219 | } | |
220 | ||
f4927c45 AB |
221 | static long |
222 | mraid_mm_unlocked_ioctl(struct file *filep, unsigned int cmd, | |
223 | unsigned long arg) | |
224 | { | |
225 | int err; | |
226 | ||
a34f0b31 | 227 | /* inconsistent: mraid_mm_compat_ioctl doesn't take the BKL */ |
c45d15d2 | 228 | mutex_lock(&mraid_mm_mutex); |
f4927c45 | 229 | err = mraid_mm_ioctl(filep, cmd, arg); |
c45d15d2 | 230 | mutex_unlock(&mraid_mm_mutex); |
f4927c45 AB |
231 | |
232 | return err; | |
233 | } | |
1da177e4 LT |
234 | |
235 | /** | |
236 | * mraid_mm_get_adapter - Returns corresponding adapters for the mimd packet | |
237 | * @umimd : User space mimd_t ioctl packet | |
a69b74d3 RD |
238 | * @rval : returned success/error status |
239 | * | |
240 | * The function return value is a pointer to the located @adapter. | |
1da177e4 LT |
241 | */ |
242 | static mraid_mmadp_t * | |
243 | mraid_mm_get_adapter(mimd_t __user *umimd, int *rval) | |
244 | { | |
245 | mraid_mmadp_t *adapter; | |
246 | mimd_t mimd; | |
247 | uint32_t adapno; | |
248 | int iterator; | |
249 | ||
250 | ||
251 | if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) { | |
252 | *rval = -EFAULT; | |
253 | return NULL; | |
254 | } | |
255 | ||
256 | adapno = GETADAP(mimd.ui.fcs.adapno); | |
257 | ||
258 | if (adapno >= adapters_count_g) { | |
259 | *rval = -ENODEV; | |
260 | return NULL; | |
261 | } | |
262 | ||
263 | adapter = NULL; | |
264 | iterator = 0; | |
265 | ||
266 | list_for_each_entry(adapter, &adapters_list_g, list) { | |
267 | if (iterator++ == adapno) break; | |
268 | } | |
269 | ||
270 | if (!adapter) { | |
271 | *rval = -ENODEV; | |
272 | return NULL; | |
273 | } | |
274 | ||
275 | return adapter; | |
276 | } | |
277 | ||
a69b74d3 RD |
278 | /** |
279 | * handle_drvrcmd - Checks if the opcode is a driver cmd and if it is, handles it. | |
1da177e4 LT |
280 | * @arg : packet sent by the user app |
281 | * @old_ioctl : mimd if 1; uioc otherwise | |
a69b74d3 | 282 | * @rval : pointer for command's returned value (not function status) |
1da177e4 LT |
283 | */ |
284 | static int | |
285 | handle_drvrcmd(void __user *arg, uint8_t old_ioctl, int *rval) | |
286 | { | |
287 | mimd_t __user *umimd; | |
288 | mimd_t kmimd; | |
289 | uint8_t opcode; | |
290 | uint8_t subopcode; | |
291 | ||
292 | if (old_ioctl) | |
293 | goto old_packet; | |
294 | else | |
295 | goto new_packet; | |
296 | ||
297 | new_packet: | |
298 | return (-ENOTSUPP); | |
299 | ||
300 | old_packet: | |
301 | *rval = 0; | |
302 | umimd = arg; | |
303 | ||
304 | if (copy_from_user(&kmimd, umimd, sizeof(mimd_t))) | |
305 | return (-EFAULT); | |
306 | ||
307 | opcode = kmimd.ui.fcs.opcode; | |
308 | subopcode = kmimd.ui.fcs.subopcode; | |
309 | ||
310 | /* | |
311 | * If the opcode is 0x82 and the subopcode is either GET_DRVRVER or | |
312 | * GET_NUMADP, then we can handle. Otherwise we should return 1 to | |
313 | * indicate that we cannot handle this. | |
314 | */ | |
315 | if (opcode != 0x82) | |
316 | return 1; | |
317 | ||
318 | switch (subopcode) { | |
319 | ||
320 | case MEGAIOC_QDRVRVER: | |
321 | ||
322 | if (copy_to_user(kmimd.data, &drvr_ver, sizeof(uint32_t))) | |
323 | return (-EFAULT); | |
324 | ||
325 | return 0; | |
326 | ||
327 | case MEGAIOC_QNADAP: | |
328 | ||
329 | *rval = adapters_count_g; | |
330 | ||
331 | if (copy_to_user(kmimd.data, &adapters_count_g, | |
332 | sizeof(uint32_t))) | |
333 | return (-EFAULT); | |
334 | ||
335 | return 0; | |
336 | ||
337 | default: | |
338 | /* cannot handle */ | |
339 | return 1; | |
340 | } | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
345 | ||
346 | /** | |
347 | * mimd_to_kioc - Converter from old to new ioctl format | |
1da177e4 | 348 | * @umimd : user space old MIMD IOCTL |
a69b74d3 | 349 | * @adp : adapter softstate |
1da177e4 LT |
350 | * @kioc : kernel space new format IOCTL |
351 | * | |
352 | * Routine to convert MIMD interface IOCTL to new interface IOCTL packet. The | |
353 | * new packet is in kernel space so that driver can perform operations on it | |
354 | * freely. | |
355 | */ | |
356 | ||
357 | static int | |
358 | mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc) | |
359 | { | |
360 | mbox64_t *mbox64; | |
361 | mbox_t *mbox; | |
362 | mraid_passthru_t *pthru32; | |
363 | uint32_t adapno; | |
364 | uint8_t opcode; | |
365 | uint8_t subopcode; | |
366 | mimd_t mimd; | |
367 | ||
368 | if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) | |
369 | return (-EFAULT); | |
370 | ||
371 | /* | |
372 | * Applications are not allowed to send extd pthru | |
373 | */ | |
374 | if ((mimd.mbox[0] == MBOXCMD_PASSTHRU64) || | |
375 | (mimd.mbox[0] == MBOXCMD_EXTPTHRU)) | |
376 | return (-EINVAL); | |
377 | ||
378 | opcode = mimd.ui.fcs.opcode; | |
379 | subopcode = mimd.ui.fcs.subopcode; | |
380 | adapno = GETADAP(mimd.ui.fcs.adapno); | |
381 | ||
382 | if (adapno >= adapters_count_g) | |
383 | return (-ENODEV); | |
384 | ||
385 | kioc->adapno = adapno; | |
386 | kioc->mb_type = MBOX_LEGACY; | |
387 | kioc->app_type = APPTYPE_MIMD; | |
388 | ||
389 | switch (opcode) { | |
390 | ||
391 | case 0x82: | |
392 | ||
393 | if (subopcode == MEGAIOC_QADAPINFO) { | |
394 | ||
395 | kioc->opcode = GET_ADAP_INFO; | |
396 | kioc->data_dir = UIOC_RD; | |
397 | kioc->xferlen = sizeof(mraid_hba_info_t); | |
398 | ||
399 | if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) | |
400 | return (-ENOMEM); | |
401 | } | |
402 | else { | |
403 | con_log(CL_ANN, (KERN_WARNING | |
404 | "megaraid cmm: Invalid subop\n")); | |
405 | return (-EINVAL); | |
406 | } | |
407 | ||
408 | break; | |
409 | ||
410 | case 0x81: | |
411 | ||
412 | kioc->opcode = MBOX_CMD; | |
413 | kioc->xferlen = mimd.ui.fcs.length; | |
414 | kioc->user_data_len = kioc->xferlen; | |
415 | kioc->user_data = mimd.ui.fcs.buffer; | |
416 | ||
417 | if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) | |
418 | return (-ENOMEM); | |
419 | ||
420 | if (mimd.outlen) kioc->data_dir = UIOC_RD; | |
421 | if (mimd.inlen) kioc->data_dir |= UIOC_WR; | |
422 | ||
423 | break; | |
424 | ||
425 | case 0x80: | |
426 | ||
427 | kioc->opcode = MBOX_CMD; | |
428 | kioc->xferlen = (mimd.outlen > mimd.inlen) ? | |
429 | mimd.outlen : mimd.inlen; | |
430 | kioc->user_data_len = kioc->xferlen; | |
431 | kioc->user_data = mimd.data; | |
432 | ||
433 | if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) | |
434 | return (-ENOMEM); | |
435 | ||
436 | if (mimd.outlen) kioc->data_dir = UIOC_RD; | |
437 | if (mimd.inlen) kioc->data_dir |= UIOC_WR; | |
438 | ||
439 | break; | |
440 | ||
441 | default: | |
442 | return (-EINVAL); | |
443 | } | |
444 | ||
445 | /* | |
446 | * If driver command, nothing else to do | |
447 | */ | |
448 | if (opcode == 0x82) | |
449 | return 0; | |
450 | ||
451 | /* | |
452 | * This is a mailbox cmd; copy the mailbox from mimd | |
453 | */ | |
454 | mbox64 = (mbox64_t *)((unsigned long)kioc->cmdbuf); | |
455 | mbox = &mbox64->mbox32; | |
456 | memcpy(mbox, mimd.mbox, 14); | |
457 | ||
458 | if (mbox->cmd != MBOXCMD_PASSTHRU) { // regular DCMD | |
459 | ||
460 | mbox->xferaddr = (uint32_t)kioc->buf_paddr; | |
461 | ||
462 | if (kioc->data_dir & UIOC_WR) { | |
463 | if (copy_from_user(kioc->buf_vaddr, kioc->user_data, | |
464 | kioc->xferlen)) { | |
465 | return (-EFAULT); | |
466 | } | |
467 | } | |
468 | ||
469 | return 0; | |
470 | } | |
471 | ||
472 | /* | |
473 | * This is a regular 32-bit pthru cmd; mbox points to pthru struct. | |
474 | * Just like in above case, the beginning for memblk is treated as | |
475 | * a mailbox. The passthru will begin at next 1K boundary. And the | |
476 | * data will start 1K after that. | |
477 | */ | |
478 | pthru32 = kioc->pthru32; | |
479 | kioc->user_pthru = &umimd->pthru; | |
480 | mbox->xferaddr = (uint32_t)kioc->pthru32_h; | |
481 | ||
482 | if (copy_from_user(pthru32, kioc->user_pthru, | |
483 | sizeof(mraid_passthru_t))) { | |
484 | return (-EFAULT); | |
485 | } | |
486 | ||
487 | pthru32->dataxferaddr = kioc->buf_paddr; | |
488 | if (kioc->data_dir & UIOC_WR) { | |
3de22601 DC |
489 | if (pthru32->dataxferlen > kioc->xferlen) |
490 | return -EINVAL; | |
1da177e4 LT |
491 | if (copy_from_user(kioc->buf_vaddr, kioc->user_data, |
492 | pthru32->dataxferlen)) { | |
493 | return (-EFAULT); | |
494 | } | |
495 | } | |
496 | ||
497 | return 0; | |
498 | } | |
499 | ||
500 | /** | |
501 | * mraid_mm_attch_buf - Attach a free dma buffer for required size | |
1da177e4 LT |
502 | * @adp : Adapter softstate |
503 | * @kioc : kioc that the buffer needs to be attached to | |
504 | * @xferlen : required length for buffer | |
505 | * | |
506 | * First we search for a pool with smallest buffer that is >= @xferlen. If | |
507 | * that pool has no free buffer, we will try for the next bigger size. If none | |
508 | * is available, we will try to allocate the smallest buffer that is >= | |
509 | * @xferlen and attach it the pool. | |
510 | */ | |
511 | static int | |
512 | mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen) | |
513 | { | |
514 | mm_dmapool_t *pool; | |
515 | int right_pool = -1; | |
516 | unsigned long flags; | |
517 | int i; | |
518 | ||
519 | kioc->pool_index = -1; | |
520 | kioc->buf_vaddr = NULL; | |
521 | kioc->buf_paddr = 0; | |
522 | kioc->free_buf = 0; | |
523 | ||
524 | /* | |
525 | * We need xferlen amount of memory. See if we can get it from our | |
526 | * dma pools. If we don't get exact size, we will try bigger buffer | |
527 | */ | |
528 | ||
529 | for (i = 0; i < MAX_DMA_POOLS; i++) { | |
530 | ||
531 | pool = &adp->dma_pool_list[i]; | |
532 | ||
533 | if (xferlen > pool->buf_size) | |
534 | continue; | |
535 | ||
536 | if (right_pool == -1) | |
537 | right_pool = i; | |
538 | ||
539 | spin_lock_irqsave(&pool->lock, flags); | |
540 | ||
541 | if (!pool->in_use) { | |
542 | ||
543 | pool->in_use = 1; | |
544 | kioc->pool_index = i; | |
545 | kioc->buf_vaddr = pool->vaddr; | |
546 | kioc->buf_paddr = pool->paddr; | |
547 | ||
548 | spin_unlock_irqrestore(&pool->lock, flags); | |
549 | return 0; | |
550 | } | |
551 | else { | |
552 | spin_unlock_irqrestore(&pool->lock, flags); | |
553 | continue; | |
554 | } | |
555 | } | |
556 | ||
557 | /* | |
558 | * If xferlen doesn't match any of our pools, return error | |
559 | */ | |
560 | if (right_pool == -1) | |
561 | return -EINVAL; | |
562 | ||
563 | /* | |
564 | * We did not get any buffer from the preallocated pool. Let us try | |
565 | * to allocate one new buffer. NOTE: This is a blocking call. | |
566 | */ | |
567 | pool = &adp->dma_pool_list[right_pool]; | |
568 | ||
569 | spin_lock_irqsave(&pool->lock, flags); | |
570 | ||
571 | kioc->pool_index = right_pool; | |
572 | kioc->free_buf = 1; | |
573 | kioc->buf_vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL, | |
574 | &kioc->buf_paddr); | |
575 | spin_unlock_irqrestore(&pool->lock, flags); | |
576 | ||
577 | if (!kioc->buf_vaddr) | |
578 | return -ENOMEM; | |
579 | ||
580 | return 0; | |
581 | } | |
582 | ||
583 | /** | |
584 | * mraid_mm_alloc_kioc - Returns a uioc_t from free list | |
585 | * @adp : Adapter softstate for this module | |
586 | * | |
587 | * The kioc_semaphore is initialized with number of kioc nodes in the | |
588 | * free kioc pool. If the kioc pool is empty, this function blocks till | |
589 | * a kioc becomes free. | |
590 | */ | |
591 | static uioc_t * | |
592 | mraid_mm_alloc_kioc(mraid_mmadp_t *adp) | |
593 | { | |
594 | uioc_t *kioc; | |
595 | struct list_head* head; | |
596 | unsigned long flags; | |
597 | ||
598 | down(&adp->kioc_semaphore); | |
599 | ||
600 | spin_lock_irqsave(&adp->kioc_pool_lock, flags); | |
601 | ||
602 | head = &adp->kioc_pool; | |
603 | ||
604 | if (list_empty(head)) { | |
605 | up(&adp->kioc_semaphore); | |
606 | spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); | |
607 | ||
608 | con_log(CL_ANN, ("megaraid cmm: kioc list empty!\n")); | |
609 | return NULL; | |
610 | } | |
611 | ||
612 | kioc = list_entry(head->next, uioc_t, list); | |
613 | list_del_init(&kioc->list); | |
614 | ||
615 | spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); | |
616 | ||
617 | memset((caddr_t)(unsigned long)kioc->cmdbuf, 0, sizeof(mbox64_t)); | |
618 | memset((caddr_t) kioc->pthru32, 0, sizeof(mraid_passthru_t)); | |
619 | ||
620 | kioc->buf_vaddr = NULL; | |
621 | kioc->buf_paddr = 0; | |
622 | kioc->pool_index =-1; | |
623 | kioc->free_buf = 0; | |
624 | kioc->user_data = NULL; | |
625 | kioc->user_data_len = 0; | |
626 | kioc->user_pthru = NULL; | |
627 | kioc->timedout = 0; | |
628 | ||
629 | return kioc; | |
630 | } | |
631 | ||
632 | /** | |
633 | * mraid_mm_dealloc_kioc - Return kioc to free pool | |
1da177e4 LT |
634 | * @adp : Adapter softstate |
635 | * @kioc : uioc_t node to be returned to free pool | |
636 | */ | |
637 | static void | |
638 | mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc) | |
639 | { | |
640 | mm_dmapool_t *pool; | |
641 | unsigned long flags; | |
642 | ||
643 | if (kioc->pool_index != -1) { | |
644 | pool = &adp->dma_pool_list[kioc->pool_index]; | |
645 | ||
646 | /* This routine may be called in non-isr context also */ | |
647 | spin_lock_irqsave(&pool->lock, flags); | |
648 | ||
649 | /* | |
650 | * While attaching the dma buffer, if we didn't get the | |
651 | * required buffer from the pool, we would have allocated | |
652 | * it at the run time and set the free_buf flag. We must | |
653 | * free that buffer. Otherwise, just mark that the buffer is | |
654 | * not in use | |
655 | */ | |
656 | if (kioc->free_buf == 1) | |
657 | pci_pool_free(pool->handle, kioc->buf_vaddr, | |
658 | kioc->buf_paddr); | |
659 | else | |
660 | pool->in_use = 0; | |
661 | ||
662 | spin_unlock_irqrestore(&pool->lock, flags); | |
663 | } | |
664 | ||
665 | /* Return the kioc to the free pool */ | |
666 | spin_lock_irqsave(&adp->kioc_pool_lock, flags); | |
667 | list_add(&kioc->list, &adp->kioc_pool); | |
668 | spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); | |
669 | ||
670 | /* increment the free kioc count */ | |
671 | up(&adp->kioc_semaphore); | |
672 | ||
673 | return; | |
674 | } | |
675 | ||
676 | /** | |
677 | * lld_ioctl - Routine to issue ioctl to low level drvr | |
1da177e4 LT |
678 | * @adp : The adapter handle |
679 | * @kioc : The ioctl packet with kernel addresses | |
680 | */ | |
681 | static int | |
682 | lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc) | |
683 | { | |
684 | int rval; | |
685 | struct timer_list timer; | |
686 | struct timer_list *tp = NULL; | |
687 | ||
688 | kioc->status = -ENODATA; | |
689 | rval = adp->issue_uioc(adp->drvr_data, kioc, IOCTL_ISSUE); | |
690 | ||
691 | if (rval) return rval; | |
692 | ||
693 | /* | |
694 | * Start the timer | |
695 | */ | |
696 | if (adp->timeout > 0) { | |
697 | tp = &timer; | |
698 | init_timer(tp); | |
699 | ||
700 | tp->function = lld_timedout; | |
701 | tp->data = (unsigned long)kioc; | |
702 | tp->expires = jiffies + adp->timeout * HZ; | |
703 | ||
704 | add_timer(tp); | |
705 | } | |
706 | ||
707 | /* | |
708 | * Wait till the low level driver completes the ioctl. After this | |
709 | * call, the ioctl either completed successfully or timedout. | |
710 | */ | |
711 | wait_event(wait_q, (kioc->status != -ENODATA)); | |
712 | if (tp) { | |
713 | del_timer_sync(tp); | |
714 | } | |
715 | ||
716 | /* | |
717 | * If the command had timedout, we mark the controller offline | |
718 | * before returning | |
719 | */ | |
720 | if (kioc->timedout) { | |
721 | adp->quiescent = 0; | |
722 | } | |
723 | ||
724 | return kioc->status; | |
725 | } | |
726 | ||
727 | ||
728 | /** | |
729 | * ioctl_done - callback from the low level driver | |
1da177e4 LT |
730 | * @kioc : completed ioctl packet |
731 | */ | |
732 | static void | |
733 | ioctl_done(uioc_t *kioc) | |
734 | { | |
735 | uint32_t adapno; | |
736 | int iterator; | |
737 | mraid_mmadp_t* adapter; | |
738 | ||
739 | /* | |
740 | * When the kioc returns from driver, make sure it still doesn't | |
741 | * have ENODATA in status. Otherwise, driver will hang on wait_event | |
742 | * forever | |
743 | */ | |
744 | if (kioc->status == -ENODATA) { | |
745 | con_log(CL_ANN, (KERN_WARNING | |
746 | "megaraid cmm: lld didn't change status!\n")); | |
747 | ||
748 | kioc->status = -EINVAL; | |
749 | } | |
750 | ||
751 | /* | |
752 | * Check if this kioc was timedout before. If so, nobody is waiting | |
753 | * on this kioc. We don't have to wake up anybody. Instead, we just | |
754 | * have to free the kioc | |
755 | */ | |
756 | if (kioc->timedout) { | |
757 | iterator = 0; | |
758 | adapter = NULL; | |
759 | adapno = kioc->adapno; | |
760 | ||
761 | con_log(CL_ANN, ( KERN_WARNING "megaraid cmm: completed " | |
762 | "ioctl that was timedout before\n")); | |
763 | ||
764 | list_for_each_entry(adapter, &adapters_list_g, list) { | |
765 | if (iterator++ == adapno) break; | |
766 | } | |
767 | ||
768 | kioc->timedout = 0; | |
769 | ||
770 | if (adapter) { | |
771 | mraid_mm_dealloc_kioc( adapter, kioc ); | |
772 | } | |
773 | } | |
774 | else { | |
775 | wake_up(&wait_q); | |
776 | } | |
777 | } | |
778 | ||
779 | ||
a69b74d3 RD |
780 | /** |
781 | * lld_timedout - callback from the expired timer | |
1da177e4 LT |
782 | * @ptr : ioctl packet that timed out |
783 | */ | |
784 | static void | |
785 | lld_timedout(unsigned long ptr) | |
786 | { | |
787 | uioc_t *kioc = (uioc_t *)ptr; | |
788 | ||
789 | kioc->status = -ETIME; | |
790 | kioc->timedout = 1; | |
791 | ||
792 | con_log(CL_ANN, (KERN_WARNING "megaraid cmm: ioctl timed out\n")); | |
793 | ||
794 | wake_up(&wait_q); | |
795 | } | |
796 | ||
797 | ||
798 | /** | |
a69b74d3 | 799 | * kioc_to_mimd - Converter from new back to old format |
1da177e4 LT |
800 | * @kioc : Kernel space IOCTL packet (successfully issued) |
801 | * @mimd : User space MIMD packet | |
802 | */ | |
803 | static int | |
804 | kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd) | |
805 | { | |
806 | mimd_t kmimd; | |
807 | uint8_t opcode; | |
808 | uint8_t subopcode; | |
809 | ||
810 | mbox64_t *mbox64; | |
811 | mraid_passthru_t __user *upthru32; | |
812 | mraid_passthru_t *kpthru32; | |
813 | mcontroller_t cinfo; | |
814 | mraid_hba_info_t *hinfo; | |
815 | ||
816 | ||
817 | if (copy_from_user(&kmimd, mimd, sizeof(mimd_t))) | |
818 | return (-EFAULT); | |
819 | ||
820 | opcode = kmimd.ui.fcs.opcode; | |
821 | subopcode = kmimd.ui.fcs.subopcode; | |
822 | ||
823 | if (opcode == 0x82) { | |
824 | switch (subopcode) { | |
825 | ||
826 | case MEGAIOC_QADAPINFO: | |
827 | ||
828 | hinfo = (mraid_hba_info_t *)(unsigned long) | |
829 | kioc->buf_vaddr; | |
830 | ||
831 | hinfo_to_cinfo(hinfo, &cinfo); | |
832 | ||
833 | if (copy_to_user(kmimd.data, &cinfo, sizeof(cinfo))) | |
834 | return (-EFAULT); | |
835 | ||
836 | return 0; | |
837 | ||
838 | default: | |
839 | return (-EINVAL); | |
840 | } | |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
845 | mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; | |
846 | ||
847 | if (kioc->user_pthru) { | |
848 | ||
849 | upthru32 = kioc->user_pthru; | |
850 | kpthru32 = kioc->pthru32; | |
851 | ||
852 | if (copy_to_user(&upthru32->scsistatus, | |
853 | &kpthru32->scsistatus, | |
854 | sizeof(uint8_t))) { | |
855 | return (-EFAULT); | |
856 | } | |
857 | } | |
858 | ||
859 | if (kioc->user_data) { | |
860 | if (copy_to_user(kioc->user_data, kioc->buf_vaddr, | |
861 | kioc->user_data_len)) { | |
862 | return (-EFAULT); | |
863 | } | |
864 | } | |
865 | ||
866 | if (copy_to_user(&mimd->mbox[17], | |
867 | &mbox64->mbox32.status, sizeof(uint8_t))) { | |
868 | return (-EFAULT); | |
869 | } | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | ||
875 | /** | |
876 | * hinfo_to_cinfo - Convert new format hba info into old format | |
1da177e4 LT |
877 | * @hinfo : New format, more comprehensive adapter info |
878 | * @cinfo : Old format adapter info to support mimd_t apps | |
879 | */ | |
880 | static void | |
881 | hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo) | |
882 | { | |
883 | if (!hinfo || !cinfo) | |
884 | return; | |
885 | ||
886 | cinfo->base = hinfo->baseport; | |
887 | cinfo->irq = hinfo->irq; | |
888 | cinfo->numldrv = hinfo->num_ldrv; | |
889 | cinfo->pcibus = hinfo->pci_bus; | |
890 | cinfo->pcidev = hinfo->pci_slot; | |
891 | cinfo->pcifun = PCI_FUNC(hinfo->pci_dev_fn); | |
892 | cinfo->pciid = hinfo->pci_device_id; | |
893 | cinfo->pcivendor = hinfo->pci_vendor_id; | |
894 | cinfo->pcislot = hinfo->pci_slot; | |
895 | cinfo->uid = hinfo->unique_id; | |
896 | } | |
897 | ||
898 | ||
a69b74d3 RD |
899 | /** |
900 | * mraid_mm_register_adp - Registration routine for low level drivers | |
3948ff8b | 901 | * @lld_adp : Adapter object |
1da177e4 LT |
902 | */ |
903 | int | |
904 | mraid_mm_register_adp(mraid_mmadp_t *lld_adp) | |
905 | { | |
906 | mraid_mmadp_t *adapter; | |
907 | mbox64_t *mbox_list; | |
908 | uioc_t *kioc; | |
909 | uint32_t rval; | |
910 | int i; | |
911 | ||
912 | ||
913 | if (lld_adp->drvr_type != DRVRTYPE_MBOX) | |
914 | return (-EINVAL); | |
915 | ||
dd00cc48 | 916 | adapter = kzalloc(sizeof(mraid_mmadp_t), GFP_KERNEL); |
1da177e4 | 917 | |
5236467a AB |
918 | if (!adapter) |
919 | return -ENOMEM; | |
1da177e4 | 920 | |
1da177e4 LT |
921 | |
922 | adapter->unique_id = lld_adp->unique_id; | |
923 | adapter->drvr_type = lld_adp->drvr_type; | |
924 | adapter->drvr_data = lld_adp->drvr_data; | |
925 | adapter->pdev = lld_adp->pdev; | |
926 | adapter->issue_uioc = lld_adp->issue_uioc; | |
927 | adapter->timeout = lld_adp->timeout; | |
928 | adapter->max_kioc = lld_adp->max_kioc; | |
929 | adapter->quiescent = 1; | |
930 | ||
931 | /* | |
932 | * Allocate single blocks of memory for all required kiocs, | |
933 | * mailboxes and passthru structures. | |
934 | */ | |
935 | adapter->kioc_list = kmalloc(sizeof(uioc_t) * lld_adp->max_kioc, | |
936 | GFP_KERNEL); | |
937 | adapter->mbox_list = kmalloc(sizeof(mbox64_t) * lld_adp->max_kioc, | |
938 | GFP_KERNEL); | |
939 | adapter->pthru_dma_pool = pci_pool_create("megaraid mm pthru pool", | |
940 | adapter->pdev, | |
941 | sizeof(mraid_passthru_t), | |
942 | 16, 0); | |
943 | ||
944 | if (!adapter->kioc_list || !adapter->mbox_list || | |
945 | !adapter->pthru_dma_pool) { | |
946 | ||
947 | con_log(CL_ANN, (KERN_WARNING | |
cadbd4a5 | 948 | "megaraid cmm: out of memory, %s %d\n", __func__, |
1da177e4 LT |
949 | __LINE__)); |
950 | ||
951 | rval = (-ENOMEM); | |
952 | ||
953 | goto memalloc_error; | |
954 | } | |
955 | ||
956 | /* | |
957 | * Slice kioc_list and make a kioc_pool with the individiual kiocs | |
958 | */ | |
959 | INIT_LIST_HEAD(&adapter->kioc_pool); | |
960 | spin_lock_init(&adapter->kioc_pool_lock); | |
961 | sema_init(&adapter->kioc_semaphore, lld_adp->max_kioc); | |
962 | ||
963 | mbox_list = (mbox64_t *)adapter->mbox_list; | |
964 | ||
965 | for (i = 0; i < lld_adp->max_kioc; i++) { | |
966 | ||
967 | kioc = adapter->kioc_list + i; | |
968 | kioc->cmdbuf = (uint64_t)(unsigned long)(mbox_list + i); | |
969 | kioc->pthru32 = pci_pool_alloc(adapter->pthru_dma_pool, | |
970 | GFP_KERNEL, &kioc->pthru32_h); | |
971 | ||
972 | if (!kioc->pthru32) { | |
973 | ||
974 | con_log(CL_ANN, (KERN_WARNING | |
975 | "megaraid cmm: out of memory, %s %d\n", | |
cadbd4a5 | 976 | __func__, __LINE__)); |
1da177e4 LT |
977 | |
978 | rval = (-ENOMEM); | |
979 | ||
980 | goto pthru_dma_pool_error; | |
981 | } | |
982 | ||
983 | list_add_tail(&kioc->list, &adapter->kioc_pool); | |
984 | } | |
985 | ||
986 | // Setup the dma pools for data buffers | |
987 | if ((rval = mraid_mm_setup_dma_pools(adapter)) != 0) { | |
988 | goto dma_pool_error; | |
989 | } | |
990 | ||
991 | list_add_tail(&adapter->list, &adapters_list_g); | |
992 | ||
993 | adapters_count_g++; | |
994 | ||
995 | return 0; | |
996 | ||
997 | dma_pool_error: | |
998 | /* Do nothing */ | |
999 | ||
1000 | pthru_dma_pool_error: | |
1001 | ||
1002 | for (i = 0; i < lld_adp->max_kioc; i++) { | |
1003 | kioc = adapter->kioc_list + i; | |
1004 | if (kioc->pthru32) { | |
1005 | pci_pool_free(adapter->pthru_dma_pool, kioc->pthru32, | |
1006 | kioc->pthru32_h); | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | memalloc_error: | |
1011 | ||
c9475cb0 JJ |
1012 | kfree(adapter->kioc_list); |
1013 | kfree(adapter->mbox_list); | |
1da177e4 LT |
1014 | |
1015 | if (adapter->pthru_dma_pool) | |
1016 | pci_pool_destroy(adapter->pthru_dma_pool); | |
1017 | ||
c9475cb0 | 1018 | kfree(adapter); |
1da177e4 LT |
1019 | |
1020 | return rval; | |
1021 | } | |
1022 | ||
1023 | ||
1024 | /** | |
1025 | * mraid_mm_adapter_app_handle - return the application handle for this adapter | |
a69b74d3 | 1026 | * @unique_id : adapter unique identifier |
1da177e4 | 1027 | * |
a69b74d3 | 1028 | * For the given driver data, locate the adapter in our global list and |
1da177e4 LT |
1029 | * return the corresponding handle, which is also used by applications to |
1030 | * uniquely identify an adapter. | |
1031 | * | |
a69b74d3 RD |
1032 | * Return adapter handle if found in the list. |
1033 | * Return 0 if adapter could not be located, should never happen though. | |
1da177e4 LT |
1034 | */ |
1035 | uint32_t | |
1036 | mraid_mm_adapter_app_handle(uint32_t unique_id) | |
1037 | { | |
1038 | mraid_mmadp_t *adapter; | |
1039 | mraid_mmadp_t *tmp; | |
1040 | int index = 0; | |
1041 | ||
1042 | list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) { | |
1043 | ||
1044 | if (adapter->unique_id == unique_id) { | |
1045 | ||
1046 | return MKADAP(index); | |
1047 | } | |
1048 | ||
1049 | index++; | |
1050 | } | |
1051 | ||
1052 | return 0; | |
1053 | } | |
1054 | ||
1055 | ||
1056 | /** | |
1057 | * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter | |
1da177e4 LT |
1058 | * @adp : Adapter softstate |
1059 | * | |
1060 | * We maintain a pool of dma buffers per each adapter. Each pool has one | |
1061 | * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers. | |
1062 | * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We | |
1063 | * dont' want to waste too much memory by allocating more buffers per each | |
1064 | * pool. | |
1065 | */ | |
1066 | static int | |
1067 | mraid_mm_setup_dma_pools(mraid_mmadp_t *adp) | |
1068 | { | |
1069 | mm_dmapool_t *pool; | |
1070 | int bufsize; | |
1071 | int i; | |
1072 | ||
1073 | /* | |
1074 | * Create MAX_DMA_POOLS number of pools | |
1075 | */ | |
1076 | bufsize = MRAID_MM_INIT_BUFF_SIZE; | |
1077 | ||
1078 | for (i = 0; i < MAX_DMA_POOLS; i++){ | |
1079 | ||
1080 | pool = &adp->dma_pool_list[i]; | |
1081 | ||
1082 | pool->buf_size = bufsize; | |
1083 | spin_lock_init(&pool->lock); | |
1084 | ||
1085 | pool->handle = pci_pool_create("megaraid mm data buffer", | |
1086 | adp->pdev, bufsize, 16, 0); | |
1087 | ||
1088 | if (!pool->handle) { | |
1089 | goto dma_pool_setup_error; | |
1090 | } | |
1091 | ||
1092 | pool->vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL, | |
1093 | &pool->paddr); | |
1094 | ||
1095 | if (!pool->vaddr) | |
1096 | goto dma_pool_setup_error; | |
1097 | ||
1098 | bufsize = bufsize * 2; | |
1099 | } | |
1100 | ||
1101 | return 0; | |
1102 | ||
1103 | dma_pool_setup_error: | |
1104 | ||
1105 | mraid_mm_teardown_dma_pools(adp); | |
1106 | return (-ENOMEM); | |
1107 | } | |
1108 | ||
1109 | ||
a69b74d3 | 1110 | /** |
1da177e4 | 1111 | * mraid_mm_unregister_adp - Unregister routine for low level drivers |
1da177e4 | 1112 | * @unique_id : UID of the adpater |
a69b74d3 RD |
1113 | * |
1114 | * Assumes no outstanding ioctls to llds. | |
1da177e4 LT |
1115 | */ |
1116 | int | |
1117 | mraid_mm_unregister_adp(uint32_t unique_id) | |
1118 | { | |
1119 | mraid_mmadp_t *adapter; | |
1120 | mraid_mmadp_t *tmp; | |
1121 | ||
1122 | list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) { | |
1123 | ||
1124 | ||
1125 | if (adapter->unique_id == unique_id) { | |
1126 | ||
1127 | adapters_count_g--; | |
1128 | ||
1129 | list_del_init(&adapter->list); | |
1130 | ||
1131 | mraid_mm_free_adp_resources(adapter); | |
1132 | ||
1133 | kfree(adapter); | |
1134 | ||
1135 | con_log(CL_ANN, ( | |
1136 | "megaraid cmm: Unregistered one adapter:%#x\n", | |
1137 | unique_id)); | |
1138 | ||
1139 | return 0; | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | return (-ENODEV); | |
1144 | } | |
1145 | ||
1146 | /** | |
1147 | * mraid_mm_free_adp_resources - Free adapter softstate | |
1da177e4 LT |
1148 | * @adp : Adapter softstate |
1149 | */ | |
1150 | static void | |
1151 | mraid_mm_free_adp_resources(mraid_mmadp_t *adp) | |
1152 | { | |
1153 | uioc_t *kioc; | |
1154 | int i; | |
1155 | ||
1156 | mraid_mm_teardown_dma_pools(adp); | |
1157 | ||
1158 | for (i = 0; i < adp->max_kioc; i++) { | |
1159 | ||
1160 | kioc = adp->kioc_list + i; | |
1161 | ||
1162 | pci_pool_free(adp->pthru_dma_pool, kioc->pthru32, | |
1163 | kioc->pthru32_h); | |
1164 | } | |
1165 | ||
1166 | kfree(adp->kioc_list); | |
1da177e4 LT |
1167 | kfree(adp->mbox_list); |
1168 | ||
1169 | pci_pool_destroy(adp->pthru_dma_pool); | |
1170 | ||
1171 | ||
1172 | return; | |
1173 | } | |
1174 | ||
1175 | ||
1176 | /** | |
1177 | * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers | |
1da177e4 LT |
1178 | * @adp : Adapter softstate |
1179 | */ | |
1180 | static void | |
1181 | mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp) | |
1182 | { | |
1183 | int i; | |
1184 | mm_dmapool_t *pool; | |
1185 | ||
1186 | for (i = 0; i < MAX_DMA_POOLS; i++) { | |
1187 | ||
1188 | pool = &adp->dma_pool_list[i]; | |
1189 | ||
1190 | if (pool->handle) { | |
1191 | ||
1192 | if (pool->vaddr) | |
1193 | pci_pool_free(pool->handle, pool->vaddr, | |
1194 | pool->paddr); | |
1195 | ||
1196 | pci_pool_destroy(pool->handle); | |
1197 | pool->handle = NULL; | |
1198 | } | |
1199 | } | |
1200 | ||
1201 | return; | |
1202 | } | |
1203 | ||
1204 | /** | |
a69b74d3 | 1205 | * mraid_mm_init - Module entry point |
1da177e4 LT |
1206 | */ |
1207 | static int __init | |
1208 | mraid_mm_init(void) | |
1209 | { | |
90a95af8 TH |
1210 | int err; |
1211 | ||
1da177e4 LT |
1212 | // Announce the driver version |
1213 | con_log(CL_ANN, (KERN_INFO "megaraid cmm: %s %s\n", | |
1214 | LSI_COMMON_MOD_VERSION, LSI_COMMON_MOD_EXT_VERSION)); | |
1215 | ||
90a95af8 TH |
1216 | err = misc_register(&megaraid_mm_dev); |
1217 | if (err < 0) { | |
1218 | con_log(CL_ANN, ("megaraid cmm: cannot register misc device\n")); | |
1219 | return err; | |
1da177e4 LT |
1220 | } |
1221 | ||
1222 | init_waitqueue_head(&wait_q); | |
1223 | ||
1224 | INIT_LIST_HEAD(&adapters_list_g); | |
1225 | ||
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | ||
a69b74d3 | 1230 | #ifdef CONFIG_COMPAT |
1da177e4 | 1231 | /** |
a69b74d3 RD |
1232 | * mraid_mm_compat_ioctl - 32bit to 64bit ioctl conversion routine |
1233 | * @filep : file operations pointer (ignored) | |
1234 | * @cmd : ioctl command | |
1235 | * @arg : user ioctl packet | |
1da177e4 | 1236 | */ |
1da177e4 LT |
1237 | static long |
1238 | mraid_mm_compat_ioctl(struct file *filep, unsigned int cmd, | |
1239 | unsigned long arg) | |
1240 | { | |
1241 | int err; | |
672b2d38 | 1242 | |
f4927c45 | 1243 | err = mraid_mm_ioctl(filep, cmd, arg); |
672b2d38 | 1244 | |
1da177e4 LT |
1245 | return err; |
1246 | } | |
1247 | #endif | |
1248 | ||
1249 | /** | |
a69b74d3 | 1250 | * mraid_mm_exit - Module exit point |
1da177e4 LT |
1251 | */ |
1252 | static void __exit | |
1253 | mraid_mm_exit(void) | |
1254 | { | |
1255 | con_log(CL_DLEVEL1 , ("exiting common mod\n")); | |
1256 | ||
90a95af8 | 1257 | misc_deregister(&megaraid_mm_dev); |
1da177e4 LT |
1258 | } |
1259 | ||
1260 | module_init(mraid_mm_init); | |
1261 | module_exit(mraid_mm_exit); | |
1262 | ||
1263 | /* vi: set ts=8 sw=8 tw=78: */ |