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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 *); | |
c251a7be | 38 | static void lld_timedout(struct timer_list *); |
1da177e4 LT |
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 | |
7296f62f NK |
182 | * or return NULL if the list head is empty for the pointer |
183 | * of type mraid_mmapt passed to mraid_mm_alloc_kioc | |
1da177e4 LT |
184 | */ |
185 | kioc = mraid_mm_alloc_kioc(adp); | |
7296f62f NK |
186 | if (!kioc) |
187 | return -ENXIO; | |
1da177e4 LT |
188 | |
189 | /* | |
190 | * User sent the old mimd_t ioctl packet. Convert it to uioc_t. | |
191 | */ | |
192 | if ((rval = mimd_to_kioc(argp, adp, kioc))) { | |
193 | mraid_mm_dealloc_kioc(adp, kioc); | |
194 | return rval; | |
195 | } | |
196 | ||
197 | kioc->done = ioctl_done; | |
198 | ||
199 | /* | |
200 | * Issue the IOCTL to the low level driver. After the IOCTL completes | |
201 | * release the kioc if and only if it was _not_ timedout. If it was | |
202 | * timedout, that means that resources are still with low level driver. | |
203 | */ | |
204 | if ((rval = lld_ioctl(adp, kioc))) { | |
205 | ||
206 | if (!kioc->timedout) | |
207 | mraid_mm_dealloc_kioc(adp, kioc); | |
208 | ||
209 | return rval; | |
210 | } | |
211 | ||
212 | /* | |
213 | * Convert the kioc back to user space | |
214 | */ | |
215 | rval = kioc_to_mimd(kioc, argp); | |
216 | ||
217 | /* | |
218 | * Return the kioc to free pool | |
219 | */ | |
220 | mraid_mm_dealloc_kioc(adp, kioc); | |
221 | ||
222 | return rval; | |
223 | } | |
224 | ||
f4927c45 AB |
225 | static long |
226 | mraid_mm_unlocked_ioctl(struct file *filep, unsigned int cmd, | |
227 | unsigned long arg) | |
228 | { | |
229 | int err; | |
230 | ||
a34f0b31 | 231 | /* inconsistent: mraid_mm_compat_ioctl doesn't take the BKL */ |
c45d15d2 | 232 | mutex_lock(&mraid_mm_mutex); |
f4927c45 | 233 | err = mraid_mm_ioctl(filep, cmd, arg); |
c45d15d2 | 234 | mutex_unlock(&mraid_mm_mutex); |
f4927c45 AB |
235 | |
236 | return err; | |
237 | } | |
1da177e4 LT |
238 | |
239 | /** | |
240 | * mraid_mm_get_adapter - Returns corresponding adapters for the mimd packet | |
241 | * @umimd : User space mimd_t ioctl packet | |
a69b74d3 RD |
242 | * @rval : returned success/error status |
243 | * | |
244 | * The function return value is a pointer to the located @adapter. | |
1da177e4 LT |
245 | */ |
246 | static mraid_mmadp_t * | |
247 | mraid_mm_get_adapter(mimd_t __user *umimd, int *rval) | |
248 | { | |
249 | mraid_mmadp_t *adapter; | |
250 | mimd_t mimd; | |
251 | uint32_t adapno; | |
252 | int iterator; | |
253 | ||
254 | ||
255 | if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) { | |
256 | *rval = -EFAULT; | |
257 | return NULL; | |
258 | } | |
259 | ||
260 | adapno = GETADAP(mimd.ui.fcs.adapno); | |
261 | ||
262 | if (adapno >= adapters_count_g) { | |
263 | *rval = -ENODEV; | |
264 | return NULL; | |
265 | } | |
266 | ||
267 | adapter = NULL; | |
268 | iterator = 0; | |
269 | ||
270 | list_for_each_entry(adapter, &adapters_list_g, list) { | |
271 | if (iterator++ == adapno) break; | |
272 | } | |
273 | ||
274 | if (!adapter) { | |
275 | *rval = -ENODEV; | |
276 | return NULL; | |
277 | } | |
278 | ||
279 | return adapter; | |
280 | } | |
281 | ||
a69b74d3 RD |
282 | /** |
283 | * handle_drvrcmd - Checks if the opcode is a driver cmd and if it is, handles it. | |
1da177e4 LT |
284 | * @arg : packet sent by the user app |
285 | * @old_ioctl : mimd if 1; uioc otherwise | |
a69b74d3 | 286 | * @rval : pointer for command's returned value (not function status) |
1da177e4 LT |
287 | */ |
288 | static int | |
289 | handle_drvrcmd(void __user *arg, uint8_t old_ioctl, int *rval) | |
290 | { | |
291 | mimd_t __user *umimd; | |
292 | mimd_t kmimd; | |
293 | uint8_t opcode; | |
294 | uint8_t subopcode; | |
295 | ||
296 | if (old_ioctl) | |
297 | goto old_packet; | |
298 | else | |
299 | goto new_packet; | |
300 | ||
301 | new_packet: | |
302 | return (-ENOTSUPP); | |
303 | ||
304 | old_packet: | |
305 | *rval = 0; | |
306 | umimd = arg; | |
307 | ||
308 | if (copy_from_user(&kmimd, umimd, sizeof(mimd_t))) | |
309 | return (-EFAULT); | |
310 | ||
311 | opcode = kmimd.ui.fcs.opcode; | |
312 | subopcode = kmimd.ui.fcs.subopcode; | |
313 | ||
314 | /* | |
315 | * If the opcode is 0x82 and the subopcode is either GET_DRVRVER or | |
316 | * GET_NUMADP, then we can handle. Otherwise we should return 1 to | |
317 | * indicate that we cannot handle this. | |
318 | */ | |
319 | if (opcode != 0x82) | |
320 | return 1; | |
321 | ||
322 | switch (subopcode) { | |
323 | ||
324 | case MEGAIOC_QDRVRVER: | |
325 | ||
326 | if (copy_to_user(kmimd.data, &drvr_ver, sizeof(uint32_t))) | |
327 | return (-EFAULT); | |
328 | ||
329 | return 0; | |
330 | ||
331 | case MEGAIOC_QNADAP: | |
332 | ||
333 | *rval = adapters_count_g; | |
334 | ||
335 | if (copy_to_user(kmimd.data, &adapters_count_g, | |
336 | sizeof(uint32_t))) | |
337 | return (-EFAULT); | |
338 | ||
339 | return 0; | |
340 | ||
341 | default: | |
342 | /* cannot handle */ | |
343 | return 1; | |
344 | } | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | ||
350 | /** | |
351 | * mimd_to_kioc - Converter from old to new ioctl format | |
1da177e4 | 352 | * @umimd : user space old MIMD IOCTL |
a69b74d3 | 353 | * @adp : adapter softstate |
1da177e4 LT |
354 | * @kioc : kernel space new format IOCTL |
355 | * | |
356 | * Routine to convert MIMD interface IOCTL to new interface IOCTL packet. The | |
357 | * new packet is in kernel space so that driver can perform operations on it | |
358 | * freely. | |
359 | */ | |
360 | ||
361 | static int | |
362 | mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc) | |
363 | { | |
364 | mbox64_t *mbox64; | |
365 | mbox_t *mbox; | |
366 | mraid_passthru_t *pthru32; | |
367 | uint32_t adapno; | |
368 | uint8_t opcode; | |
369 | uint8_t subopcode; | |
370 | mimd_t mimd; | |
371 | ||
372 | if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) | |
373 | return (-EFAULT); | |
374 | ||
375 | /* | |
376 | * Applications are not allowed to send extd pthru | |
377 | */ | |
378 | if ((mimd.mbox[0] == MBOXCMD_PASSTHRU64) || | |
379 | (mimd.mbox[0] == MBOXCMD_EXTPTHRU)) | |
380 | return (-EINVAL); | |
381 | ||
382 | opcode = mimd.ui.fcs.opcode; | |
383 | subopcode = mimd.ui.fcs.subopcode; | |
384 | adapno = GETADAP(mimd.ui.fcs.adapno); | |
385 | ||
386 | if (adapno >= adapters_count_g) | |
387 | return (-ENODEV); | |
388 | ||
389 | kioc->adapno = adapno; | |
390 | kioc->mb_type = MBOX_LEGACY; | |
391 | kioc->app_type = APPTYPE_MIMD; | |
392 | ||
393 | switch (opcode) { | |
394 | ||
395 | case 0x82: | |
396 | ||
397 | if (subopcode == MEGAIOC_QADAPINFO) { | |
398 | ||
399 | kioc->opcode = GET_ADAP_INFO; | |
400 | kioc->data_dir = UIOC_RD; | |
401 | kioc->xferlen = sizeof(mraid_hba_info_t); | |
402 | ||
403 | if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) | |
404 | return (-ENOMEM); | |
405 | } | |
406 | else { | |
407 | con_log(CL_ANN, (KERN_WARNING | |
408 | "megaraid cmm: Invalid subop\n")); | |
409 | return (-EINVAL); | |
410 | } | |
411 | ||
412 | break; | |
413 | ||
414 | case 0x81: | |
415 | ||
416 | kioc->opcode = MBOX_CMD; | |
417 | kioc->xferlen = mimd.ui.fcs.length; | |
418 | kioc->user_data_len = kioc->xferlen; | |
419 | kioc->user_data = mimd.ui.fcs.buffer; | |
420 | ||
421 | if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) | |
422 | return (-ENOMEM); | |
423 | ||
424 | if (mimd.outlen) kioc->data_dir = UIOC_RD; | |
425 | if (mimd.inlen) kioc->data_dir |= UIOC_WR; | |
426 | ||
427 | break; | |
428 | ||
429 | case 0x80: | |
430 | ||
431 | kioc->opcode = MBOX_CMD; | |
432 | kioc->xferlen = (mimd.outlen > mimd.inlen) ? | |
433 | mimd.outlen : mimd.inlen; | |
434 | kioc->user_data_len = kioc->xferlen; | |
435 | kioc->user_data = mimd.data; | |
436 | ||
437 | if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen)) | |
438 | return (-ENOMEM); | |
439 | ||
440 | if (mimd.outlen) kioc->data_dir = UIOC_RD; | |
441 | if (mimd.inlen) kioc->data_dir |= UIOC_WR; | |
442 | ||
443 | break; | |
444 | ||
445 | default: | |
446 | return (-EINVAL); | |
447 | } | |
448 | ||
449 | /* | |
450 | * If driver command, nothing else to do | |
451 | */ | |
452 | if (opcode == 0x82) | |
453 | return 0; | |
454 | ||
455 | /* | |
456 | * This is a mailbox cmd; copy the mailbox from mimd | |
457 | */ | |
458 | mbox64 = (mbox64_t *)((unsigned long)kioc->cmdbuf); | |
459 | mbox = &mbox64->mbox32; | |
460 | memcpy(mbox, mimd.mbox, 14); | |
461 | ||
462 | if (mbox->cmd != MBOXCMD_PASSTHRU) { // regular DCMD | |
463 | ||
464 | mbox->xferaddr = (uint32_t)kioc->buf_paddr; | |
465 | ||
466 | if (kioc->data_dir & UIOC_WR) { | |
467 | if (copy_from_user(kioc->buf_vaddr, kioc->user_data, | |
468 | kioc->xferlen)) { | |
469 | return (-EFAULT); | |
470 | } | |
471 | } | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
476 | /* | |
477 | * This is a regular 32-bit pthru cmd; mbox points to pthru struct. | |
478 | * Just like in above case, the beginning for memblk is treated as | |
479 | * a mailbox. The passthru will begin at next 1K boundary. And the | |
480 | * data will start 1K after that. | |
481 | */ | |
482 | pthru32 = kioc->pthru32; | |
483 | kioc->user_pthru = &umimd->pthru; | |
484 | mbox->xferaddr = (uint32_t)kioc->pthru32_h; | |
485 | ||
486 | if (copy_from_user(pthru32, kioc->user_pthru, | |
487 | sizeof(mraid_passthru_t))) { | |
488 | return (-EFAULT); | |
489 | } | |
490 | ||
491 | pthru32->dataxferaddr = kioc->buf_paddr; | |
492 | if (kioc->data_dir & UIOC_WR) { | |
3de22601 DC |
493 | if (pthru32->dataxferlen > kioc->xferlen) |
494 | return -EINVAL; | |
1da177e4 LT |
495 | if (copy_from_user(kioc->buf_vaddr, kioc->user_data, |
496 | pthru32->dataxferlen)) { | |
497 | return (-EFAULT); | |
498 | } | |
499 | } | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
504 | /** | |
505 | * mraid_mm_attch_buf - Attach a free dma buffer for required size | |
1da177e4 LT |
506 | * @adp : Adapter softstate |
507 | * @kioc : kioc that the buffer needs to be attached to | |
508 | * @xferlen : required length for buffer | |
509 | * | |
510 | * First we search for a pool with smallest buffer that is >= @xferlen. If | |
511 | * that pool has no free buffer, we will try for the next bigger size. If none | |
512 | * is available, we will try to allocate the smallest buffer that is >= | |
513 | * @xferlen and attach it the pool. | |
514 | */ | |
515 | static int | |
516 | mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen) | |
517 | { | |
518 | mm_dmapool_t *pool; | |
519 | int right_pool = -1; | |
520 | unsigned long flags; | |
521 | int i; | |
522 | ||
523 | kioc->pool_index = -1; | |
524 | kioc->buf_vaddr = NULL; | |
525 | kioc->buf_paddr = 0; | |
526 | kioc->free_buf = 0; | |
527 | ||
528 | /* | |
529 | * We need xferlen amount of memory. See if we can get it from our | |
530 | * dma pools. If we don't get exact size, we will try bigger buffer | |
531 | */ | |
532 | ||
533 | for (i = 0; i < MAX_DMA_POOLS; i++) { | |
534 | ||
535 | pool = &adp->dma_pool_list[i]; | |
536 | ||
537 | if (xferlen > pool->buf_size) | |
538 | continue; | |
539 | ||
540 | if (right_pool == -1) | |
541 | right_pool = i; | |
542 | ||
543 | spin_lock_irqsave(&pool->lock, flags); | |
544 | ||
545 | if (!pool->in_use) { | |
546 | ||
547 | pool->in_use = 1; | |
548 | kioc->pool_index = i; | |
549 | kioc->buf_vaddr = pool->vaddr; | |
550 | kioc->buf_paddr = pool->paddr; | |
551 | ||
552 | spin_unlock_irqrestore(&pool->lock, flags); | |
553 | return 0; | |
554 | } | |
555 | else { | |
556 | spin_unlock_irqrestore(&pool->lock, flags); | |
557 | continue; | |
558 | } | |
559 | } | |
560 | ||
561 | /* | |
562 | * If xferlen doesn't match any of our pools, return error | |
563 | */ | |
564 | if (right_pool == -1) | |
565 | return -EINVAL; | |
566 | ||
567 | /* | |
568 | * We did not get any buffer from the preallocated pool. Let us try | |
569 | * to allocate one new buffer. NOTE: This is a blocking call. | |
570 | */ | |
571 | pool = &adp->dma_pool_list[right_pool]; | |
572 | ||
573 | spin_lock_irqsave(&pool->lock, flags); | |
574 | ||
575 | kioc->pool_index = right_pool; | |
576 | kioc->free_buf = 1; | |
fc69d86d | 577 | kioc->buf_vaddr = dma_pool_alloc(pool->handle, GFP_ATOMIC, |
1da177e4 LT |
578 | &kioc->buf_paddr); |
579 | spin_unlock_irqrestore(&pool->lock, flags); | |
580 | ||
581 | if (!kioc->buf_vaddr) | |
582 | return -ENOMEM; | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
587 | /** | |
588 | * mraid_mm_alloc_kioc - Returns a uioc_t from free list | |
589 | * @adp : Adapter softstate for this module | |
590 | * | |
591 | * The kioc_semaphore is initialized with number of kioc nodes in the | |
592 | * free kioc pool. If the kioc pool is empty, this function blocks till | |
593 | * a kioc becomes free. | |
594 | */ | |
595 | static uioc_t * | |
596 | mraid_mm_alloc_kioc(mraid_mmadp_t *adp) | |
597 | { | |
598 | uioc_t *kioc; | |
599 | struct list_head* head; | |
600 | unsigned long flags; | |
601 | ||
602 | down(&adp->kioc_semaphore); | |
603 | ||
604 | spin_lock_irqsave(&adp->kioc_pool_lock, flags); | |
605 | ||
606 | head = &adp->kioc_pool; | |
607 | ||
608 | if (list_empty(head)) { | |
609 | up(&adp->kioc_semaphore); | |
610 | spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); | |
611 | ||
612 | con_log(CL_ANN, ("megaraid cmm: kioc list empty!\n")); | |
613 | return NULL; | |
614 | } | |
615 | ||
616 | kioc = list_entry(head->next, uioc_t, list); | |
617 | list_del_init(&kioc->list); | |
618 | ||
619 | spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); | |
620 | ||
621 | memset((caddr_t)(unsigned long)kioc->cmdbuf, 0, sizeof(mbox64_t)); | |
622 | memset((caddr_t) kioc->pthru32, 0, sizeof(mraid_passthru_t)); | |
623 | ||
624 | kioc->buf_vaddr = NULL; | |
625 | kioc->buf_paddr = 0; | |
626 | kioc->pool_index =-1; | |
627 | kioc->free_buf = 0; | |
628 | kioc->user_data = NULL; | |
629 | kioc->user_data_len = 0; | |
630 | kioc->user_pthru = NULL; | |
631 | kioc->timedout = 0; | |
632 | ||
633 | return kioc; | |
634 | } | |
635 | ||
636 | /** | |
637 | * mraid_mm_dealloc_kioc - Return kioc to free pool | |
1da177e4 LT |
638 | * @adp : Adapter softstate |
639 | * @kioc : uioc_t node to be returned to free pool | |
640 | */ | |
641 | static void | |
642 | mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc) | |
643 | { | |
644 | mm_dmapool_t *pool; | |
645 | unsigned long flags; | |
646 | ||
647 | if (kioc->pool_index != -1) { | |
648 | pool = &adp->dma_pool_list[kioc->pool_index]; | |
649 | ||
650 | /* This routine may be called in non-isr context also */ | |
651 | spin_lock_irqsave(&pool->lock, flags); | |
652 | ||
653 | /* | |
654 | * While attaching the dma buffer, if we didn't get the | |
655 | * required buffer from the pool, we would have allocated | |
656 | * it at the run time and set the free_buf flag. We must | |
657 | * free that buffer. Otherwise, just mark that the buffer is | |
658 | * not in use | |
659 | */ | |
660 | if (kioc->free_buf == 1) | |
fc69d86d | 661 | dma_pool_free(pool->handle, kioc->buf_vaddr, |
1da177e4 LT |
662 | kioc->buf_paddr); |
663 | else | |
664 | pool->in_use = 0; | |
665 | ||
666 | spin_unlock_irqrestore(&pool->lock, flags); | |
667 | } | |
668 | ||
669 | /* Return the kioc to the free pool */ | |
670 | spin_lock_irqsave(&adp->kioc_pool_lock, flags); | |
671 | list_add(&kioc->list, &adp->kioc_pool); | |
672 | spin_unlock_irqrestore(&adp->kioc_pool_lock, flags); | |
673 | ||
674 | /* increment the free kioc count */ | |
675 | up(&adp->kioc_semaphore); | |
676 | ||
677 | return; | |
678 | } | |
679 | ||
680 | /** | |
681 | * lld_ioctl - Routine to issue ioctl to low level drvr | |
1da177e4 LT |
682 | * @adp : The adapter handle |
683 | * @kioc : The ioctl packet with kernel addresses | |
684 | */ | |
685 | static int | |
686 | lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc) | |
687 | { | |
688 | int rval; | |
c251a7be | 689 | struct uioc_timeout timeout = { }; |
1da177e4 LT |
690 | |
691 | kioc->status = -ENODATA; | |
692 | rval = adp->issue_uioc(adp->drvr_data, kioc, IOCTL_ISSUE); | |
693 | ||
694 | if (rval) return rval; | |
695 | ||
696 | /* | |
697 | * Start the timer | |
698 | */ | |
699 | if (adp->timeout > 0) { | |
c251a7be KC |
700 | timeout.uioc = kioc; |
701 | timer_setup_on_stack(&timeout.timer, lld_timedout, 0); | |
1da177e4 | 702 | |
c251a7be | 703 | timeout.timer.expires = jiffies + adp->timeout * HZ; |
1da177e4 | 704 | |
c251a7be | 705 | add_timer(&timeout.timer); |
1da177e4 LT |
706 | } |
707 | ||
708 | /* | |
709 | * Wait till the low level driver completes the ioctl. After this | |
710 | * call, the ioctl either completed successfully or timedout. | |
711 | */ | |
712 | wait_event(wait_q, (kioc->status != -ENODATA)); | |
c251a7be KC |
713 | if (timeout.timer.function) { |
714 | del_timer_sync(&timeout.timer); | |
715 | destroy_timer_on_stack(&timeout.timer); | |
1da177e4 LT |
716 | } |
717 | ||
718 | /* | |
719 | * If the command had timedout, we mark the controller offline | |
720 | * before returning | |
721 | */ | |
722 | if (kioc->timedout) { | |
723 | adp->quiescent = 0; | |
724 | } | |
725 | ||
726 | return kioc->status; | |
727 | } | |
728 | ||
729 | ||
730 | /** | |
731 | * ioctl_done - callback from the low level driver | |
1da177e4 LT |
732 | * @kioc : completed ioctl packet |
733 | */ | |
734 | static void | |
735 | ioctl_done(uioc_t *kioc) | |
736 | { | |
737 | uint32_t adapno; | |
738 | int iterator; | |
739 | mraid_mmadp_t* adapter; | |
740 | ||
741 | /* | |
742 | * When the kioc returns from driver, make sure it still doesn't | |
743 | * have ENODATA in status. Otherwise, driver will hang on wait_event | |
744 | * forever | |
745 | */ | |
746 | if (kioc->status == -ENODATA) { | |
747 | con_log(CL_ANN, (KERN_WARNING | |
748 | "megaraid cmm: lld didn't change status!\n")); | |
749 | ||
750 | kioc->status = -EINVAL; | |
751 | } | |
752 | ||
753 | /* | |
754 | * Check if this kioc was timedout before. If so, nobody is waiting | |
755 | * on this kioc. We don't have to wake up anybody. Instead, we just | |
756 | * have to free the kioc | |
757 | */ | |
758 | if (kioc->timedout) { | |
759 | iterator = 0; | |
760 | adapter = NULL; | |
761 | adapno = kioc->adapno; | |
762 | ||
763 | con_log(CL_ANN, ( KERN_WARNING "megaraid cmm: completed " | |
764 | "ioctl that was timedout before\n")); | |
765 | ||
766 | list_for_each_entry(adapter, &adapters_list_g, list) { | |
767 | if (iterator++ == adapno) break; | |
768 | } | |
769 | ||
770 | kioc->timedout = 0; | |
771 | ||
772 | if (adapter) { | |
773 | mraid_mm_dealloc_kioc( adapter, kioc ); | |
774 | } | |
775 | } | |
776 | else { | |
777 | wake_up(&wait_q); | |
778 | } | |
779 | } | |
780 | ||
781 | ||
a69b74d3 RD |
782 | /** |
783 | * lld_timedout - callback from the expired timer | |
c251a7be | 784 | * @t : timer that timed out |
1da177e4 LT |
785 | */ |
786 | static void | |
c251a7be | 787 | lld_timedout(struct timer_list *t) |
1da177e4 | 788 | { |
c251a7be KC |
789 | struct uioc_timeout *timeout = from_timer(timeout, t, timer); |
790 | uioc_t *kioc = timeout->uioc; | |
1da177e4 LT |
791 | |
792 | kioc->status = -ETIME; | |
793 | kioc->timedout = 1; | |
794 | ||
795 | con_log(CL_ANN, (KERN_WARNING "megaraid cmm: ioctl timed out\n")); | |
796 | ||
797 | wake_up(&wait_q); | |
798 | } | |
799 | ||
800 | ||
801 | /** | |
a69b74d3 | 802 | * kioc_to_mimd - Converter from new back to old format |
1da177e4 LT |
803 | * @kioc : Kernel space IOCTL packet (successfully issued) |
804 | * @mimd : User space MIMD packet | |
805 | */ | |
806 | static int | |
807 | kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd) | |
808 | { | |
809 | mimd_t kmimd; | |
810 | uint8_t opcode; | |
811 | uint8_t subopcode; | |
812 | ||
813 | mbox64_t *mbox64; | |
814 | mraid_passthru_t __user *upthru32; | |
815 | mraid_passthru_t *kpthru32; | |
816 | mcontroller_t cinfo; | |
817 | mraid_hba_info_t *hinfo; | |
818 | ||
819 | ||
820 | if (copy_from_user(&kmimd, mimd, sizeof(mimd_t))) | |
821 | return (-EFAULT); | |
822 | ||
823 | opcode = kmimd.ui.fcs.opcode; | |
824 | subopcode = kmimd.ui.fcs.subopcode; | |
825 | ||
826 | if (opcode == 0x82) { | |
827 | switch (subopcode) { | |
828 | ||
829 | case MEGAIOC_QADAPINFO: | |
830 | ||
831 | hinfo = (mraid_hba_info_t *)(unsigned long) | |
832 | kioc->buf_vaddr; | |
833 | ||
834 | hinfo_to_cinfo(hinfo, &cinfo); | |
835 | ||
836 | if (copy_to_user(kmimd.data, &cinfo, sizeof(cinfo))) | |
837 | return (-EFAULT); | |
838 | ||
839 | return 0; | |
840 | ||
841 | default: | |
842 | return (-EINVAL); | |
843 | } | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
848 | mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; | |
849 | ||
850 | if (kioc->user_pthru) { | |
851 | ||
852 | upthru32 = kioc->user_pthru; | |
853 | kpthru32 = kioc->pthru32; | |
854 | ||
855 | if (copy_to_user(&upthru32->scsistatus, | |
856 | &kpthru32->scsistatus, | |
857 | sizeof(uint8_t))) { | |
858 | return (-EFAULT); | |
859 | } | |
860 | } | |
861 | ||
862 | if (kioc->user_data) { | |
863 | if (copy_to_user(kioc->user_data, kioc->buf_vaddr, | |
864 | kioc->user_data_len)) { | |
865 | return (-EFAULT); | |
866 | } | |
867 | } | |
868 | ||
869 | if (copy_to_user(&mimd->mbox[17], | |
870 | &mbox64->mbox32.status, sizeof(uint8_t))) { | |
871 | return (-EFAULT); | |
872 | } | |
873 | ||
874 | return 0; | |
875 | } | |
876 | ||
877 | ||
878 | /** | |
879 | * hinfo_to_cinfo - Convert new format hba info into old format | |
1da177e4 LT |
880 | * @hinfo : New format, more comprehensive adapter info |
881 | * @cinfo : Old format adapter info to support mimd_t apps | |
882 | */ | |
883 | static void | |
884 | hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo) | |
885 | { | |
886 | if (!hinfo || !cinfo) | |
887 | return; | |
888 | ||
889 | cinfo->base = hinfo->baseport; | |
890 | cinfo->irq = hinfo->irq; | |
891 | cinfo->numldrv = hinfo->num_ldrv; | |
892 | cinfo->pcibus = hinfo->pci_bus; | |
893 | cinfo->pcidev = hinfo->pci_slot; | |
894 | cinfo->pcifun = PCI_FUNC(hinfo->pci_dev_fn); | |
895 | cinfo->pciid = hinfo->pci_device_id; | |
896 | cinfo->pcivendor = hinfo->pci_vendor_id; | |
897 | cinfo->pcislot = hinfo->pci_slot; | |
898 | cinfo->uid = hinfo->unique_id; | |
899 | } | |
900 | ||
901 | ||
a69b74d3 RD |
902 | /** |
903 | * mraid_mm_register_adp - Registration routine for low level drivers | |
3948ff8b | 904 | * @lld_adp : Adapter object |
1da177e4 LT |
905 | */ |
906 | int | |
907 | mraid_mm_register_adp(mraid_mmadp_t *lld_adp) | |
908 | { | |
909 | mraid_mmadp_t *adapter; | |
910 | mbox64_t *mbox_list; | |
911 | uioc_t *kioc; | |
912 | uint32_t rval; | |
913 | int i; | |
914 | ||
915 | ||
916 | if (lld_adp->drvr_type != DRVRTYPE_MBOX) | |
917 | return (-EINVAL); | |
918 | ||
dd00cc48 | 919 | adapter = kzalloc(sizeof(mraid_mmadp_t), GFP_KERNEL); |
1da177e4 | 920 | |
5236467a AB |
921 | if (!adapter) |
922 | return -ENOMEM; | |
1da177e4 | 923 | |
1da177e4 LT |
924 | |
925 | adapter->unique_id = lld_adp->unique_id; | |
926 | adapter->drvr_type = lld_adp->drvr_type; | |
927 | adapter->drvr_data = lld_adp->drvr_data; | |
928 | adapter->pdev = lld_adp->pdev; | |
929 | adapter->issue_uioc = lld_adp->issue_uioc; | |
930 | adapter->timeout = lld_adp->timeout; | |
931 | adapter->max_kioc = lld_adp->max_kioc; | |
932 | adapter->quiescent = 1; | |
933 | ||
934 | /* | |
935 | * Allocate single blocks of memory for all required kiocs, | |
936 | * mailboxes and passthru structures. | |
937 | */ | |
6da2ec56 KC |
938 | adapter->kioc_list = kmalloc_array(lld_adp->max_kioc, |
939 | sizeof(uioc_t), | |
940 | GFP_KERNEL); | |
941 | adapter->mbox_list = kmalloc_array(lld_adp->max_kioc, | |
942 | sizeof(mbox64_t), | |
943 | GFP_KERNEL); | |
fc69d86d RP |
944 | adapter->pthru_dma_pool = dma_pool_create("megaraid mm pthru pool", |
945 | &adapter->pdev->dev, | |
1da177e4 LT |
946 | sizeof(mraid_passthru_t), |
947 | 16, 0); | |
948 | ||
949 | if (!adapter->kioc_list || !adapter->mbox_list || | |
950 | !adapter->pthru_dma_pool) { | |
951 | ||
952 | con_log(CL_ANN, (KERN_WARNING | |
cadbd4a5 | 953 | "megaraid cmm: out of memory, %s %d\n", __func__, |
1da177e4 LT |
954 | __LINE__)); |
955 | ||
956 | rval = (-ENOMEM); | |
957 | ||
958 | goto memalloc_error; | |
959 | } | |
960 | ||
961 | /* | |
962 | * Slice kioc_list and make a kioc_pool with the individiual kiocs | |
963 | */ | |
964 | INIT_LIST_HEAD(&adapter->kioc_pool); | |
965 | spin_lock_init(&adapter->kioc_pool_lock); | |
966 | sema_init(&adapter->kioc_semaphore, lld_adp->max_kioc); | |
967 | ||
968 | mbox_list = (mbox64_t *)adapter->mbox_list; | |
969 | ||
970 | for (i = 0; i < lld_adp->max_kioc; i++) { | |
971 | ||
972 | kioc = adapter->kioc_list + i; | |
973 | kioc->cmdbuf = (uint64_t)(unsigned long)(mbox_list + i); | |
fc69d86d | 974 | kioc->pthru32 = dma_pool_alloc(adapter->pthru_dma_pool, |
1da177e4 LT |
975 | GFP_KERNEL, &kioc->pthru32_h); |
976 | ||
977 | if (!kioc->pthru32) { | |
978 | ||
979 | con_log(CL_ANN, (KERN_WARNING | |
980 | "megaraid cmm: out of memory, %s %d\n", | |
cadbd4a5 | 981 | __func__, __LINE__)); |
1da177e4 LT |
982 | |
983 | rval = (-ENOMEM); | |
984 | ||
985 | goto pthru_dma_pool_error; | |
986 | } | |
987 | ||
988 | list_add_tail(&kioc->list, &adapter->kioc_pool); | |
989 | } | |
990 | ||
991 | // Setup the dma pools for data buffers | |
992 | if ((rval = mraid_mm_setup_dma_pools(adapter)) != 0) { | |
993 | goto dma_pool_error; | |
994 | } | |
995 | ||
996 | list_add_tail(&adapter->list, &adapters_list_g); | |
997 | ||
998 | adapters_count_g++; | |
999 | ||
1000 | return 0; | |
1001 | ||
1002 | dma_pool_error: | |
1003 | /* Do nothing */ | |
1004 | ||
1005 | pthru_dma_pool_error: | |
1006 | ||
1007 | for (i = 0; i < lld_adp->max_kioc; i++) { | |
1008 | kioc = adapter->kioc_list + i; | |
1009 | if (kioc->pthru32) { | |
fc69d86d | 1010 | dma_pool_free(adapter->pthru_dma_pool, kioc->pthru32, |
1da177e4 LT |
1011 | kioc->pthru32_h); |
1012 | } | |
1013 | } | |
1014 | ||
1015 | memalloc_error: | |
1016 | ||
c9475cb0 JJ |
1017 | kfree(adapter->kioc_list); |
1018 | kfree(adapter->mbox_list); | |
1da177e4 LT |
1019 | |
1020 | if (adapter->pthru_dma_pool) | |
fc69d86d | 1021 | dma_pool_destroy(adapter->pthru_dma_pool); |
1da177e4 | 1022 | |
c9475cb0 | 1023 | kfree(adapter); |
1da177e4 LT |
1024 | |
1025 | return rval; | |
1026 | } | |
1027 | ||
1028 | ||
1029 | /** | |
1030 | * mraid_mm_adapter_app_handle - return the application handle for this adapter | |
a69b74d3 | 1031 | * @unique_id : adapter unique identifier |
1da177e4 | 1032 | * |
a69b74d3 | 1033 | * For the given driver data, locate the adapter in our global list and |
1da177e4 LT |
1034 | * return the corresponding handle, which is also used by applications to |
1035 | * uniquely identify an adapter. | |
1036 | * | |
a69b74d3 RD |
1037 | * Return adapter handle if found in the list. |
1038 | * Return 0 if adapter could not be located, should never happen though. | |
1da177e4 LT |
1039 | */ |
1040 | uint32_t | |
1041 | mraid_mm_adapter_app_handle(uint32_t unique_id) | |
1042 | { | |
1043 | mraid_mmadp_t *adapter; | |
1044 | mraid_mmadp_t *tmp; | |
1045 | int index = 0; | |
1046 | ||
1047 | list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) { | |
1048 | ||
1049 | if (adapter->unique_id == unique_id) { | |
1050 | ||
1051 | return MKADAP(index); | |
1052 | } | |
1053 | ||
1054 | index++; | |
1055 | } | |
1056 | ||
1057 | return 0; | |
1058 | } | |
1059 | ||
1060 | ||
1061 | /** | |
1062 | * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter | |
1da177e4 LT |
1063 | * @adp : Adapter softstate |
1064 | * | |
1065 | * We maintain a pool of dma buffers per each adapter. Each pool has one | |
1066 | * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers. | |
1067 | * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We | |
1068 | * dont' want to waste too much memory by allocating more buffers per each | |
1069 | * pool. | |
1070 | */ | |
1071 | static int | |
1072 | mraid_mm_setup_dma_pools(mraid_mmadp_t *adp) | |
1073 | { | |
1074 | mm_dmapool_t *pool; | |
1075 | int bufsize; | |
1076 | int i; | |
1077 | ||
1078 | /* | |
1079 | * Create MAX_DMA_POOLS number of pools | |
1080 | */ | |
1081 | bufsize = MRAID_MM_INIT_BUFF_SIZE; | |
1082 | ||
1083 | for (i = 0; i < MAX_DMA_POOLS; i++){ | |
1084 | ||
1085 | pool = &adp->dma_pool_list[i]; | |
1086 | ||
1087 | pool->buf_size = bufsize; | |
1088 | spin_lock_init(&pool->lock); | |
1089 | ||
fc69d86d RP |
1090 | pool->handle = dma_pool_create("megaraid mm data buffer", |
1091 | &adp->pdev->dev, bufsize, | |
1092 | 16, 0); | |
1da177e4 LT |
1093 | |
1094 | if (!pool->handle) { | |
1095 | goto dma_pool_setup_error; | |
1096 | } | |
1097 | ||
fc69d86d | 1098 | pool->vaddr = dma_pool_alloc(pool->handle, GFP_KERNEL, |
1da177e4 LT |
1099 | &pool->paddr); |
1100 | ||
1101 | if (!pool->vaddr) | |
1102 | goto dma_pool_setup_error; | |
1103 | ||
1104 | bufsize = bufsize * 2; | |
1105 | } | |
1106 | ||
1107 | return 0; | |
1108 | ||
1109 | dma_pool_setup_error: | |
1110 | ||
1111 | mraid_mm_teardown_dma_pools(adp); | |
1112 | return (-ENOMEM); | |
1113 | } | |
1114 | ||
1115 | ||
a69b74d3 | 1116 | /** |
1da177e4 | 1117 | * mraid_mm_unregister_adp - Unregister routine for low level drivers |
1da177e4 | 1118 | * @unique_id : UID of the adpater |
a69b74d3 RD |
1119 | * |
1120 | * Assumes no outstanding ioctls to llds. | |
1da177e4 LT |
1121 | */ |
1122 | int | |
1123 | mraid_mm_unregister_adp(uint32_t unique_id) | |
1124 | { | |
1125 | mraid_mmadp_t *adapter; | |
1126 | mraid_mmadp_t *tmp; | |
1127 | ||
1128 | list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) { | |
1129 | ||
1130 | ||
1131 | if (adapter->unique_id == unique_id) { | |
1132 | ||
1133 | adapters_count_g--; | |
1134 | ||
1135 | list_del_init(&adapter->list); | |
1136 | ||
1137 | mraid_mm_free_adp_resources(adapter); | |
1138 | ||
1139 | kfree(adapter); | |
1140 | ||
1141 | con_log(CL_ANN, ( | |
1142 | "megaraid cmm: Unregistered one adapter:%#x\n", | |
1143 | unique_id)); | |
1144 | ||
1145 | return 0; | |
1146 | } | |
1147 | } | |
1148 | ||
1149 | return (-ENODEV); | |
1150 | } | |
1151 | ||
1152 | /** | |
1153 | * mraid_mm_free_adp_resources - Free adapter softstate | |
1da177e4 LT |
1154 | * @adp : Adapter softstate |
1155 | */ | |
1156 | static void | |
1157 | mraid_mm_free_adp_resources(mraid_mmadp_t *adp) | |
1158 | { | |
1159 | uioc_t *kioc; | |
1160 | int i; | |
1161 | ||
1162 | mraid_mm_teardown_dma_pools(adp); | |
1163 | ||
1164 | for (i = 0; i < adp->max_kioc; i++) { | |
1165 | ||
1166 | kioc = adp->kioc_list + i; | |
1167 | ||
fc69d86d | 1168 | dma_pool_free(adp->pthru_dma_pool, kioc->pthru32, |
1da177e4 LT |
1169 | kioc->pthru32_h); |
1170 | } | |
1171 | ||
1172 | kfree(adp->kioc_list); | |
1da177e4 LT |
1173 | kfree(adp->mbox_list); |
1174 | ||
fc69d86d | 1175 | dma_pool_destroy(adp->pthru_dma_pool); |
1da177e4 LT |
1176 | |
1177 | ||
1178 | return; | |
1179 | } | |
1180 | ||
1181 | ||
1182 | /** | |
1183 | * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers | |
1da177e4 LT |
1184 | * @adp : Adapter softstate |
1185 | */ | |
1186 | static void | |
1187 | mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp) | |
1188 | { | |
1189 | int i; | |
1190 | mm_dmapool_t *pool; | |
1191 | ||
1192 | for (i = 0; i < MAX_DMA_POOLS; i++) { | |
1193 | ||
1194 | pool = &adp->dma_pool_list[i]; | |
1195 | ||
1196 | if (pool->handle) { | |
1197 | ||
1198 | if (pool->vaddr) | |
fc69d86d | 1199 | dma_pool_free(pool->handle, pool->vaddr, |
1da177e4 LT |
1200 | pool->paddr); |
1201 | ||
fc69d86d | 1202 | dma_pool_destroy(pool->handle); |
1da177e4 LT |
1203 | pool->handle = NULL; |
1204 | } | |
1205 | } | |
1206 | ||
1207 | return; | |
1208 | } | |
1209 | ||
1210 | /** | |
a69b74d3 | 1211 | * mraid_mm_init - Module entry point |
1da177e4 LT |
1212 | */ |
1213 | static int __init | |
1214 | mraid_mm_init(void) | |
1215 | { | |
90a95af8 TH |
1216 | int err; |
1217 | ||
1da177e4 LT |
1218 | // Announce the driver version |
1219 | con_log(CL_ANN, (KERN_INFO "megaraid cmm: %s %s\n", | |
1220 | LSI_COMMON_MOD_VERSION, LSI_COMMON_MOD_EXT_VERSION)); | |
1221 | ||
90a95af8 TH |
1222 | err = misc_register(&megaraid_mm_dev); |
1223 | if (err < 0) { | |
1224 | con_log(CL_ANN, ("megaraid cmm: cannot register misc device\n")); | |
1225 | return err; | |
1da177e4 LT |
1226 | } |
1227 | ||
1228 | init_waitqueue_head(&wait_q); | |
1229 | ||
1230 | INIT_LIST_HEAD(&adapters_list_g); | |
1231 | ||
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | ||
a69b74d3 | 1236 | #ifdef CONFIG_COMPAT |
1da177e4 | 1237 | /** |
a69b74d3 RD |
1238 | * mraid_mm_compat_ioctl - 32bit to 64bit ioctl conversion routine |
1239 | * @filep : file operations pointer (ignored) | |
1240 | * @cmd : ioctl command | |
1241 | * @arg : user ioctl packet | |
1da177e4 | 1242 | */ |
1da177e4 LT |
1243 | static long |
1244 | mraid_mm_compat_ioctl(struct file *filep, unsigned int cmd, | |
1245 | unsigned long arg) | |
1246 | { | |
1247 | int err; | |
672b2d38 | 1248 | |
f4927c45 | 1249 | err = mraid_mm_ioctl(filep, cmd, arg); |
672b2d38 | 1250 | |
1da177e4 LT |
1251 | return err; |
1252 | } | |
1253 | #endif | |
1254 | ||
1255 | /** | |
a69b74d3 | 1256 | * mraid_mm_exit - Module exit point |
1da177e4 LT |
1257 | */ |
1258 | static void __exit | |
1259 | mraid_mm_exit(void) | |
1260 | { | |
1261 | con_log(CL_DLEVEL1 , ("exiting common mod\n")); | |
1262 | ||
90a95af8 | 1263 | misc_deregister(&megaraid_mm_dev); |
1da177e4 LT |
1264 | } |
1265 | ||
1266 | module_init(mraid_mm_init); | |
1267 | module_exit(mraid_mm_exit); | |
1268 | ||
1269 | /* vi: set ts=8 sw=8 tw=78: */ |