staging: usbip: bugfix for isochronous packets and optimization
[zen-stable.git] / drivers / scsi / megaraid / megaraid_mm.c
blob25506c7773812156f929715a3bba4bf4de634311
1 /*
3 * Linux MegaRAID device driver
5 * Copyright (c) 2003-2004 LSI Logic Corporation.
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.
12 * FILE : megaraid_mm.c
13 * Version : v2.20.2.7 (Jul 16 2006)
15 * Common management module
17 #include <linux/sched.h>
18 #include <linux/slab.h>
19 #include <linux/mutex.h>
20 #include "megaraid_mm.h"
23 // Entry points for char node driver
24 static DEFINE_MUTEX(mraid_mm_mutex);
25 static int mraid_mm_open(struct inode *, struct file *);
26 static long mraid_mm_unlocked_ioctl(struct file *, uint, unsigned long);
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 *);
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 *);
48 #ifdef CONFIG_COMPAT
49 static long mraid_mm_compat_ioctl(struct file *, unsigned int, unsigned long);
50 #endif
52 MODULE_AUTHOR("LSI Logic Corporation");
53 MODULE_DESCRIPTION("LSI Logic Management Module");
54 MODULE_LICENSE("GPL");
55 MODULE_VERSION(LSI_COMMON_MOD_VERSION);
57 static int dbglevel = CL_ANN;
58 module_param_named(dlevel, dbglevel, int, 0);
59 MODULE_PARM_DESC(dlevel, "Debug level (default=0)");
61 EXPORT_SYMBOL(mraid_mm_register_adp);
62 EXPORT_SYMBOL(mraid_mm_unregister_adp);
63 EXPORT_SYMBOL(mraid_mm_adapter_app_handle);
65 static uint32_t drvr_ver = 0x02200207;
67 static int adapters_count_g;
68 static struct list_head adapters_list_g;
70 static wait_queue_head_t wait_q;
72 static const struct file_operations lsi_fops = {
73 .open = mraid_mm_open,
74 .unlocked_ioctl = mraid_mm_unlocked_ioctl,
75 #ifdef CONFIG_COMPAT
76 .compat_ioctl = mraid_mm_compat_ioctl,
77 #endif
78 .owner = THIS_MODULE,
79 .llseek = noop_llseek,
82 static struct miscdevice megaraid_mm_dev = {
83 .minor = MISC_DYNAMIC_MINOR,
84 .name = "megadev0",
85 .fops = &lsi_fops,
88 /**
89 * mraid_mm_open - open routine for char node interface
90 * @inode : unused
91 * @filep : unused
93 * Allow ioctl operations by apps only if they have superuser privilege.
95 static int
96 mraid_mm_open(struct inode *inode, struct file *filep)
99 * Only allow superuser to access private ioctl interface
101 if (!capable(CAP_SYS_ADMIN)) return (-EACCES);
103 return 0;
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
113 static int
114 mraid_mm_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
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;
125 * Make sure only USCSICMD are issued through this interface.
126 * MIMD application would still fire different command.
129 if ((_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD)) {
130 return (-EINVAL);
134 * Look for signature to see if this is the new or old ioctl format.
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);
142 if (memcmp(signature, EXT_IOCTL_SIGN, EXT_IOCTL_SIGN_SZ) == 0)
143 old_ioctl = 0;
144 else
145 old_ioctl = 1;
148 * At present, we don't support the new ioctl packet
150 if (!old_ioctl )
151 return (-EINVAL);
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
157 rval = handle_drvrcmd(argp, old_ioctl, &drvrcmd_rval);
159 if (rval < 0)
160 return rval;
161 else if (rval == 0)
162 return drvrcmd_rval;
164 rval = 0;
165 if ((adp = mraid_mm_get_adapter(argp, &rval)) == NULL) {
166 return rval;
170 * Check if adapter can accept ioctl. We may have marked it offline
171 * if any previous kioc had timedout on this controller.
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;
181 * The following call will block till a kioc is available
183 kioc = mraid_mm_alloc_kioc(adp);
186 * User sent the old mimd_t ioctl packet. Convert it to uioc_t.
188 if ((rval = mimd_to_kioc(argp, adp, kioc))) {
189 mraid_mm_dealloc_kioc(adp, kioc);
190 return rval;
193 kioc->done = ioctl_done;
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.
200 if ((rval = lld_ioctl(adp, kioc))) {
202 if (!kioc->timedout)
203 mraid_mm_dealloc_kioc(adp, kioc);
205 return rval;
209 * Convert the kioc back to user space
211 rval = kioc_to_mimd(kioc, argp);
214 * Return the kioc to free pool
216 mraid_mm_dealloc_kioc(adp, kioc);
218 return rval;
221 static long
222 mraid_mm_unlocked_ioctl(struct file *filep, unsigned int cmd,
223 unsigned long arg)
225 int err;
227 /* inconsistent: mraid_mm_compat_ioctl doesn't take the BKL */
228 mutex_lock(&mraid_mm_mutex);
229 err = mraid_mm_ioctl(filep, cmd, arg);
230 mutex_unlock(&mraid_mm_mutex);
232 return err;
236 * mraid_mm_get_adapter - Returns corresponding adapters for the mimd packet
237 * @umimd : User space mimd_t ioctl packet
238 * @rval : returned success/error status
240 * The function return value is a pointer to the located @adapter.
242 static mraid_mmadp_t *
243 mraid_mm_get_adapter(mimd_t __user *umimd, int *rval)
245 mraid_mmadp_t *adapter;
246 mimd_t mimd;
247 uint32_t adapno;
248 int iterator;
251 if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) {
252 *rval = -EFAULT;
253 return NULL;
256 adapno = GETADAP(mimd.ui.fcs.adapno);
258 if (adapno >= adapters_count_g) {
259 *rval = -ENODEV;
260 return NULL;
263 adapter = NULL;
264 iterator = 0;
266 list_for_each_entry(adapter, &adapters_list_g, list) {
267 if (iterator++ == adapno) break;
270 if (!adapter) {
271 *rval = -ENODEV;
272 return NULL;
275 return adapter;
279 * handle_drvrcmd - Checks if the opcode is a driver cmd and if it is, handles it.
280 * @arg : packet sent by the user app
281 * @old_ioctl : mimd if 1; uioc otherwise
282 * @rval : pointer for command's returned value (not function status)
284 static int
285 handle_drvrcmd(void __user *arg, uint8_t old_ioctl, int *rval)
287 mimd_t __user *umimd;
288 mimd_t kmimd;
289 uint8_t opcode;
290 uint8_t subopcode;
292 if (old_ioctl)
293 goto old_packet;
294 else
295 goto new_packet;
297 new_packet:
298 return (-ENOTSUPP);
300 old_packet:
301 *rval = 0;
302 umimd = arg;
304 if (copy_from_user(&kmimd, umimd, sizeof(mimd_t)))
305 return (-EFAULT);
307 opcode = kmimd.ui.fcs.opcode;
308 subopcode = kmimd.ui.fcs.subopcode;
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.
315 if (opcode != 0x82)
316 return 1;
318 switch (subopcode) {
320 case MEGAIOC_QDRVRVER:
322 if (copy_to_user(kmimd.data, &drvr_ver, sizeof(uint32_t)))
323 return (-EFAULT);
325 return 0;
327 case MEGAIOC_QNADAP:
329 *rval = adapters_count_g;
331 if (copy_to_user(kmimd.data, &adapters_count_g,
332 sizeof(uint32_t)))
333 return (-EFAULT);
335 return 0;
337 default:
338 /* cannot handle */
339 return 1;
342 return 0;
347 * mimd_to_kioc - Converter from old to new ioctl format
348 * @umimd : user space old MIMD IOCTL
349 * @adp : adapter softstate
350 * @kioc : kernel space new format IOCTL
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.
357 static int
358 mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc)
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;
368 if (copy_from_user(&mimd, umimd, sizeof(mimd_t)))
369 return (-EFAULT);
372 * Applications are not allowed to send extd pthru
374 if ((mimd.mbox[0] == MBOXCMD_PASSTHRU64) ||
375 (mimd.mbox[0] == MBOXCMD_EXTPTHRU))
376 return (-EINVAL);
378 opcode = mimd.ui.fcs.opcode;
379 subopcode = mimd.ui.fcs.subopcode;
380 adapno = GETADAP(mimd.ui.fcs.adapno);
382 if (adapno >= adapters_count_g)
383 return (-ENODEV);
385 kioc->adapno = adapno;
386 kioc->mb_type = MBOX_LEGACY;
387 kioc->app_type = APPTYPE_MIMD;
389 switch (opcode) {
391 case 0x82:
393 if (subopcode == MEGAIOC_QADAPINFO) {
395 kioc->opcode = GET_ADAP_INFO;
396 kioc->data_dir = UIOC_RD;
397 kioc->xferlen = sizeof(mraid_hba_info_t);
399 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
400 return (-ENOMEM);
402 else {
403 con_log(CL_ANN, (KERN_WARNING
404 "megaraid cmm: Invalid subop\n"));
405 return (-EINVAL);
408 break;
410 case 0x81:
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;
417 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
418 return (-ENOMEM);
420 if (mimd.outlen) kioc->data_dir = UIOC_RD;
421 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
423 break;
425 case 0x80:
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;
433 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
434 return (-ENOMEM);
436 if (mimd.outlen) kioc->data_dir = UIOC_RD;
437 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
439 break;
441 default:
442 return (-EINVAL);
446 * If driver command, nothing else to do
448 if (opcode == 0x82)
449 return 0;
452 * This is a mailbox cmd; copy the mailbox from mimd
454 mbox64 = (mbox64_t *)((unsigned long)kioc->cmdbuf);
455 mbox = &mbox64->mbox32;
456 memcpy(mbox, mimd.mbox, 14);
458 if (mbox->cmd != MBOXCMD_PASSTHRU) { // regular DCMD
460 mbox->xferaddr = (uint32_t)kioc->buf_paddr;
462 if (kioc->data_dir & UIOC_WR) {
463 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
464 kioc->xferlen)) {
465 return (-EFAULT);
469 return 0;
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.
478 pthru32 = kioc->pthru32;
479 kioc->user_pthru = &umimd->pthru;
480 mbox->xferaddr = (uint32_t)kioc->pthru32_h;
482 if (copy_from_user(pthru32, kioc->user_pthru,
483 sizeof(mraid_passthru_t))) {
484 return (-EFAULT);
487 pthru32->dataxferaddr = kioc->buf_paddr;
488 if (kioc->data_dir & UIOC_WR) {
489 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
490 pthru32->dataxferlen)) {
491 return (-EFAULT);
495 return 0;
499 * mraid_mm_attch_buf - Attach a free dma buffer for required size
500 * @adp : Adapter softstate
501 * @kioc : kioc that the buffer needs to be attached to
502 * @xferlen : required length for buffer
504 * First we search for a pool with smallest buffer that is >= @xferlen. If
505 * that pool has no free buffer, we will try for the next bigger size. If none
506 * is available, we will try to allocate the smallest buffer that is >=
507 * @xferlen and attach it the pool.
509 static int
510 mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen)
512 mm_dmapool_t *pool;
513 int right_pool = -1;
514 unsigned long flags;
515 int i;
517 kioc->pool_index = -1;
518 kioc->buf_vaddr = NULL;
519 kioc->buf_paddr = 0;
520 kioc->free_buf = 0;
523 * We need xferlen amount of memory. See if we can get it from our
524 * dma pools. If we don't get exact size, we will try bigger buffer
527 for (i = 0; i < MAX_DMA_POOLS; i++) {
529 pool = &adp->dma_pool_list[i];
531 if (xferlen > pool->buf_size)
532 continue;
534 if (right_pool == -1)
535 right_pool = i;
537 spin_lock_irqsave(&pool->lock, flags);
539 if (!pool->in_use) {
541 pool->in_use = 1;
542 kioc->pool_index = i;
543 kioc->buf_vaddr = pool->vaddr;
544 kioc->buf_paddr = pool->paddr;
546 spin_unlock_irqrestore(&pool->lock, flags);
547 return 0;
549 else {
550 spin_unlock_irqrestore(&pool->lock, flags);
551 continue;
556 * If xferlen doesn't match any of our pools, return error
558 if (right_pool == -1)
559 return -EINVAL;
562 * We did not get any buffer from the preallocated pool. Let us try
563 * to allocate one new buffer. NOTE: This is a blocking call.
565 pool = &adp->dma_pool_list[right_pool];
567 spin_lock_irqsave(&pool->lock, flags);
569 kioc->pool_index = right_pool;
570 kioc->free_buf = 1;
571 kioc->buf_vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL,
572 &kioc->buf_paddr);
573 spin_unlock_irqrestore(&pool->lock, flags);
575 if (!kioc->buf_vaddr)
576 return -ENOMEM;
578 return 0;
582 * mraid_mm_alloc_kioc - Returns a uioc_t from free list
583 * @adp : Adapter softstate for this module
585 * The kioc_semaphore is initialized with number of kioc nodes in the
586 * free kioc pool. If the kioc pool is empty, this function blocks till
587 * a kioc becomes free.
589 static uioc_t *
590 mraid_mm_alloc_kioc(mraid_mmadp_t *adp)
592 uioc_t *kioc;
593 struct list_head* head;
594 unsigned long flags;
596 down(&adp->kioc_semaphore);
598 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
600 head = &adp->kioc_pool;
602 if (list_empty(head)) {
603 up(&adp->kioc_semaphore);
604 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
606 con_log(CL_ANN, ("megaraid cmm: kioc list empty!\n"));
607 return NULL;
610 kioc = list_entry(head->next, uioc_t, list);
611 list_del_init(&kioc->list);
613 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
615 memset((caddr_t)(unsigned long)kioc->cmdbuf, 0, sizeof(mbox64_t));
616 memset((caddr_t) kioc->pthru32, 0, sizeof(mraid_passthru_t));
618 kioc->buf_vaddr = NULL;
619 kioc->buf_paddr = 0;
620 kioc->pool_index =-1;
621 kioc->free_buf = 0;
622 kioc->user_data = NULL;
623 kioc->user_data_len = 0;
624 kioc->user_pthru = NULL;
625 kioc->timedout = 0;
627 return kioc;
631 * mraid_mm_dealloc_kioc - Return kioc to free pool
632 * @adp : Adapter softstate
633 * @kioc : uioc_t node to be returned to free pool
635 static void
636 mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc)
638 mm_dmapool_t *pool;
639 unsigned long flags;
641 if (kioc->pool_index != -1) {
642 pool = &adp->dma_pool_list[kioc->pool_index];
644 /* This routine may be called in non-isr context also */
645 spin_lock_irqsave(&pool->lock, flags);
648 * While attaching the dma buffer, if we didn't get the
649 * required buffer from the pool, we would have allocated
650 * it at the run time and set the free_buf flag. We must
651 * free that buffer. Otherwise, just mark that the buffer is
652 * not in use
654 if (kioc->free_buf == 1)
655 pci_pool_free(pool->handle, kioc->buf_vaddr,
656 kioc->buf_paddr);
657 else
658 pool->in_use = 0;
660 spin_unlock_irqrestore(&pool->lock, flags);
663 /* Return the kioc to the free pool */
664 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
665 list_add(&kioc->list, &adp->kioc_pool);
666 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
668 /* increment the free kioc count */
669 up(&adp->kioc_semaphore);
671 return;
675 * lld_ioctl - Routine to issue ioctl to low level drvr
676 * @adp : The adapter handle
677 * @kioc : The ioctl packet with kernel addresses
679 static int
680 lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc)
682 int rval;
683 struct timer_list timer;
684 struct timer_list *tp = NULL;
686 kioc->status = -ENODATA;
687 rval = adp->issue_uioc(adp->drvr_data, kioc, IOCTL_ISSUE);
689 if (rval) return rval;
692 * Start the timer
694 if (adp->timeout > 0) {
695 tp = &timer;
696 init_timer(tp);
698 tp->function = lld_timedout;
699 tp->data = (unsigned long)kioc;
700 tp->expires = jiffies + adp->timeout * HZ;
702 add_timer(tp);
706 * Wait till the low level driver completes the ioctl. After this
707 * call, the ioctl either completed successfully or timedout.
709 wait_event(wait_q, (kioc->status != -ENODATA));
710 if (tp) {
711 del_timer_sync(tp);
715 * If the command had timedout, we mark the controller offline
716 * before returning
718 if (kioc->timedout) {
719 adp->quiescent = 0;
722 return kioc->status;
727 * ioctl_done - callback from the low level driver
728 * @kioc : completed ioctl packet
730 static void
731 ioctl_done(uioc_t *kioc)
733 uint32_t adapno;
734 int iterator;
735 mraid_mmadp_t* adapter;
738 * When the kioc returns from driver, make sure it still doesn't
739 * have ENODATA in status. Otherwise, driver will hang on wait_event
740 * forever
742 if (kioc->status == -ENODATA) {
743 con_log(CL_ANN, (KERN_WARNING
744 "megaraid cmm: lld didn't change status!\n"));
746 kioc->status = -EINVAL;
750 * Check if this kioc was timedout before. If so, nobody is waiting
751 * on this kioc. We don't have to wake up anybody. Instead, we just
752 * have to free the kioc
754 if (kioc->timedout) {
755 iterator = 0;
756 adapter = NULL;
757 adapno = kioc->adapno;
759 con_log(CL_ANN, ( KERN_WARNING "megaraid cmm: completed "
760 "ioctl that was timedout before\n"));
762 list_for_each_entry(adapter, &adapters_list_g, list) {
763 if (iterator++ == adapno) break;
766 kioc->timedout = 0;
768 if (adapter) {
769 mraid_mm_dealloc_kioc( adapter, kioc );
772 else {
773 wake_up(&wait_q);
779 * lld_timedout - callback from the expired timer
780 * @ptr : ioctl packet that timed out
782 static void
783 lld_timedout(unsigned long ptr)
785 uioc_t *kioc = (uioc_t *)ptr;
787 kioc->status = -ETIME;
788 kioc->timedout = 1;
790 con_log(CL_ANN, (KERN_WARNING "megaraid cmm: ioctl timed out\n"));
792 wake_up(&wait_q);
797 * kioc_to_mimd - Converter from new back to old format
798 * @kioc : Kernel space IOCTL packet (successfully issued)
799 * @mimd : User space MIMD packet
801 static int
802 kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd)
804 mimd_t kmimd;
805 uint8_t opcode;
806 uint8_t subopcode;
808 mbox64_t *mbox64;
809 mraid_passthru_t __user *upthru32;
810 mraid_passthru_t *kpthru32;
811 mcontroller_t cinfo;
812 mraid_hba_info_t *hinfo;
815 if (copy_from_user(&kmimd, mimd, sizeof(mimd_t)))
816 return (-EFAULT);
818 opcode = kmimd.ui.fcs.opcode;
819 subopcode = kmimd.ui.fcs.subopcode;
821 if (opcode == 0x82) {
822 switch (subopcode) {
824 case MEGAIOC_QADAPINFO:
826 hinfo = (mraid_hba_info_t *)(unsigned long)
827 kioc->buf_vaddr;
829 hinfo_to_cinfo(hinfo, &cinfo);
831 if (copy_to_user(kmimd.data, &cinfo, sizeof(cinfo)))
832 return (-EFAULT);
834 return 0;
836 default:
837 return (-EINVAL);
840 return 0;
843 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
845 if (kioc->user_pthru) {
847 upthru32 = kioc->user_pthru;
848 kpthru32 = kioc->pthru32;
850 if (copy_to_user(&upthru32->scsistatus,
851 &kpthru32->scsistatus,
852 sizeof(uint8_t))) {
853 return (-EFAULT);
857 if (kioc->user_data) {
858 if (copy_to_user(kioc->user_data, kioc->buf_vaddr,
859 kioc->user_data_len)) {
860 return (-EFAULT);
864 if (copy_to_user(&mimd->mbox[17],
865 &mbox64->mbox32.status, sizeof(uint8_t))) {
866 return (-EFAULT);
869 return 0;
874 * hinfo_to_cinfo - Convert new format hba info into old format
875 * @hinfo : New format, more comprehensive adapter info
876 * @cinfo : Old format adapter info to support mimd_t apps
878 static void
879 hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo)
881 if (!hinfo || !cinfo)
882 return;
884 cinfo->base = hinfo->baseport;
885 cinfo->irq = hinfo->irq;
886 cinfo->numldrv = hinfo->num_ldrv;
887 cinfo->pcibus = hinfo->pci_bus;
888 cinfo->pcidev = hinfo->pci_slot;
889 cinfo->pcifun = PCI_FUNC(hinfo->pci_dev_fn);
890 cinfo->pciid = hinfo->pci_device_id;
891 cinfo->pcivendor = hinfo->pci_vendor_id;
892 cinfo->pcislot = hinfo->pci_slot;
893 cinfo->uid = hinfo->unique_id;
898 * mraid_mm_register_adp - Registration routine for low level drivers
899 * @lld_adp : Adapter objejct
902 mraid_mm_register_adp(mraid_mmadp_t *lld_adp)
904 mraid_mmadp_t *adapter;
905 mbox64_t *mbox_list;
906 uioc_t *kioc;
907 uint32_t rval;
908 int i;
911 if (lld_adp->drvr_type != DRVRTYPE_MBOX)
912 return (-EINVAL);
914 adapter = kzalloc(sizeof(mraid_mmadp_t), GFP_KERNEL);
916 if (!adapter)
917 return -ENOMEM;
920 adapter->unique_id = lld_adp->unique_id;
921 adapter->drvr_type = lld_adp->drvr_type;
922 adapter->drvr_data = lld_adp->drvr_data;
923 adapter->pdev = lld_adp->pdev;
924 adapter->issue_uioc = lld_adp->issue_uioc;
925 adapter->timeout = lld_adp->timeout;
926 adapter->max_kioc = lld_adp->max_kioc;
927 adapter->quiescent = 1;
930 * Allocate single blocks of memory for all required kiocs,
931 * mailboxes and passthru structures.
933 adapter->kioc_list = kmalloc(sizeof(uioc_t) * lld_adp->max_kioc,
934 GFP_KERNEL);
935 adapter->mbox_list = kmalloc(sizeof(mbox64_t) * lld_adp->max_kioc,
936 GFP_KERNEL);
937 adapter->pthru_dma_pool = pci_pool_create("megaraid mm pthru pool",
938 adapter->pdev,
939 sizeof(mraid_passthru_t),
940 16, 0);
942 if (!adapter->kioc_list || !adapter->mbox_list ||
943 !adapter->pthru_dma_pool) {
945 con_log(CL_ANN, (KERN_WARNING
946 "megaraid cmm: out of memory, %s %d\n", __func__,
947 __LINE__));
949 rval = (-ENOMEM);
951 goto memalloc_error;
955 * Slice kioc_list and make a kioc_pool with the individiual kiocs
957 INIT_LIST_HEAD(&adapter->kioc_pool);
958 spin_lock_init(&adapter->kioc_pool_lock);
959 sema_init(&adapter->kioc_semaphore, lld_adp->max_kioc);
961 mbox_list = (mbox64_t *)adapter->mbox_list;
963 for (i = 0; i < lld_adp->max_kioc; i++) {
965 kioc = adapter->kioc_list + i;
966 kioc->cmdbuf = (uint64_t)(unsigned long)(mbox_list + i);
967 kioc->pthru32 = pci_pool_alloc(adapter->pthru_dma_pool,
968 GFP_KERNEL, &kioc->pthru32_h);
970 if (!kioc->pthru32) {
972 con_log(CL_ANN, (KERN_WARNING
973 "megaraid cmm: out of memory, %s %d\n",
974 __func__, __LINE__));
976 rval = (-ENOMEM);
978 goto pthru_dma_pool_error;
981 list_add_tail(&kioc->list, &adapter->kioc_pool);
984 // Setup the dma pools for data buffers
985 if ((rval = mraid_mm_setup_dma_pools(adapter)) != 0) {
986 goto dma_pool_error;
989 list_add_tail(&adapter->list, &adapters_list_g);
991 adapters_count_g++;
993 return 0;
995 dma_pool_error:
996 /* Do nothing */
998 pthru_dma_pool_error:
1000 for (i = 0; i < lld_adp->max_kioc; i++) {
1001 kioc = adapter->kioc_list + i;
1002 if (kioc->pthru32) {
1003 pci_pool_free(adapter->pthru_dma_pool, kioc->pthru32,
1004 kioc->pthru32_h);
1008 memalloc_error:
1010 kfree(adapter->kioc_list);
1011 kfree(adapter->mbox_list);
1013 if (adapter->pthru_dma_pool)
1014 pci_pool_destroy(adapter->pthru_dma_pool);
1016 kfree(adapter);
1018 return rval;
1023 * mraid_mm_adapter_app_handle - return the application handle for this adapter
1024 * @unique_id : adapter unique identifier
1026 * For the given driver data, locate the adapter in our global list and
1027 * return the corresponding handle, which is also used by applications to
1028 * uniquely identify an adapter.
1030 * Return adapter handle if found in the list.
1031 * Return 0 if adapter could not be located, should never happen though.
1033 uint32_t
1034 mraid_mm_adapter_app_handle(uint32_t unique_id)
1036 mraid_mmadp_t *adapter;
1037 mraid_mmadp_t *tmp;
1038 int index = 0;
1040 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1042 if (adapter->unique_id == unique_id) {
1044 return MKADAP(index);
1047 index++;
1050 return 0;
1055 * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter
1056 * @adp : Adapter softstate
1058 * We maintain a pool of dma buffers per each adapter. Each pool has one
1059 * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers.
1060 * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We
1061 * dont' want to waste too much memory by allocating more buffers per each
1062 * pool.
1064 static int
1065 mraid_mm_setup_dma_pools(mraid_mmadp_t *adp)
1067 mm_dmapool_t *pool;
1068 int bufsize;
1069 int i;
1072 * Create MAX_DMA_POOLS number of pools
1074 bufsize = MRAID_MM_INIT_BUFF_SIZE;
1076 for (i = 0; i < MAX_DMA_POOLS; i++){
1078 pool = &adp->dma_pool_list[i];
1080 pool->buf_size = bufsize;
1081 spin_lock_init(&pool->lock);
1083 pool->handle = pci_pool_create("megaraid mm data buffer",
1084 adp->pdev, bufsize, 16, 0);
1086 if (!pool->handle) {
1087 goto dma_pool_setup_error;
1090 pool->vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL,
1091 &pool->paddr);
1093 if (!pool->vaddr)
1094 goto dma_pool_setup_error;
1096 bufsize = bufsize * 2;
1099 return 0;
1101 dma_pool_setup_error:
1103 mraid_mm_teardown_dma_pools(adp);
1104 return (-ENOMEM);
1109 * mraid_mm_unregister_adp - Unregister routine for low level drivers
1110 * @unique_id : UID of the adpater
1112 * Assumes no outstanding ioctls to llds.
1115 mraid_mm_unregister_adp(uint32_t unique_id)
1117 mraid_mmadp_t *adapter;
1118 mraid_mmadp_t *tmp;
1120 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1123 if (adapter->unique_id == unique_id) {
1125 adapters_count_g--;
1127 list_del_init(&adapter->list);
1129 mraid_mm_free_adp_resources(adapter);
1131 kfree(adapter);
1133 con_log(CL_ANN, (
1134 "megaraid cmm: Unregistered one adapter:%#x\n",
1135 unique_id));
1137 return 0;
1141 return (-ENODEV);
1145 * mraid_mm_free_adp_resources - Free adapter softstate
1146 * @adp : Adapter softstate
1148 static void
1149 mraid_mm_free_adp_resources(mraid_mmadp_t *adp)
1151 uioc_t *kioc;
1152 int i;
1154 mraid_mm_teardown_dma_pools(adp);
1156 for (i = 0; i < adp->max_kioc; i++) {
1158 kioc = adp->kioc_list + i;
1160 pci_pool_free(adp->pthru_dma_pool, kioc->pthru32,
1161 kioc->pthru32_h);
1164 kfree(adp->kioc_list);
1165 kfree(adp->mbox_list);
1167 pci_pool_destroy(adp->pthru_dma_pool);
1170 return;
1175 * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers
1176 * @adp : Adapter softstate
1178 static void
1179 mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp)
1181 int i;
1182 mm_dmapool_t *pool;
1184 for (i = 0; i < MAX_DMA_POOLS; i++) {
1186 pool = &adp->dma_pool_list[i];
1188 if (pool->handle) {
1190 if (pool->vaddr)
1191 pci_pool_free(pool->handle, pool->vaddr,
1192 pool->paddr);
1194 pci_pool_destroy(pool->handle);
1195 pool->handle = NULL;
1199 return;
1203 * mraid_mm_init - Module entry point
1205 static int __init
1206 mraid_mm_init(void)
1208 int err;
1210 // Announce the driver version
1211 con_log(CL_ANN, (KERN_INFO "megaraid cmm: %s %s\n",
1212 LSI_COMMON_MOD_VERSION, LSI_COMMON_MOD_EXT_VERSION));
1214 err = misc_register(&megaraid_mm_dev);
1215 if (err < 0) {
1216 con_log(CL_ANN, ("megaraid cmm: cannot register misc device\n"));
1217 return err;
1220 init_waitqueue_head(&wait_q);
1222 INIT_LIST_HEAD(&adapters_list_g);
1224 return 0;
1228 #ifdef CONFIG_COMPAT
1230 * mraid_mm_compat_ioctl - 32bit to 64bit ioctl conversion routine
1231 * @filep : file operations pointer (ignored)
1232 * @cmd : ioctl command
1233 * @arg : user ioctl packet
1235 static long
1236 mraid_mm_compat_ioctl(struct file *filep, unsigned int cmd,
1237 unsigned long arg)
1239 int err;
1241 err = mraid_mm_ioctl(filep, cmd, arg);
1243 return err;
1245 #endif
1248 * mraid_mm_exit - Module exit point
1250 static void __exit
1251 mraid_mm_exit(void)
1253 con_log(CL_DLEVEL1 , ("exiting common mod\n"));
1255 misc_deregister(&megaraid_mm_dev);
1258 module_init(mraid_mm_init);
1259 module_exit(mraid_mm_exit);
1261 /* vi: set ts=8 sw=8 tw=78: */