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
18 #include "megaraid_mm.h"
21 // Entry points for char node driver
22 static int mraid_mm_open(struct inode *, struct file *);
23 static int mraid_mm_ioctl(struct inode *, struct file *, uint, unsigned long);
26 // routines to convert to and from the old the format
27 static int mimd_to_kioc(mimd_t __user *, mraid_mmadp_t *, uioc_t *);
28 static int kioc_to_mimd(uioc_t *, mimd_t __user *);
32 static int handle_drvrcmd(void __user *, uint8_t, int *);
33 static int lld_ioctl(mraid_mmadp_t *, uioc_t *);
34 static void ioctl_done(uioc_t *);
35 static void lld_timedout(unsigned long);
36 static void hinfo_to_cinfo(mraid_hba_info_t *, mcontroller_t *);
37 static mraid_mmadp_t *mraid_mm_get_adapter(mimd_t __user *, int *);
38 static uioc_t *mraid_mm_alloc_kioc(mraid_mmadp_t *);
39 static void mraid_mm_dealloc_kioc(mraid_mmadp_t *, uioc_t *);
40 static int mraid_mm_attach_buf(mraid_mmadp_t *, uioc_t *, int);
41 static int mraid_mm_setup_dma_pools(mraid_mmadp_t *);
42 static void mraid_mm_free_adp_resources(mraid_mmadp_t *);
43 static void mraid_mm_teardown_dma_pools(mraid_mmadp_t *);
46 static long mraid_mm_compat_ioctl(struct file *, unsigned int, unsigned long);
49 MODULE_AUTHOR("LSI Logic Corporation");
50 MODULE_DESCRIPTION("LSI Logic Management Module");
51 MODULE_LICENSE("GPL");
52 MODULE_VERSION(LSI_COMMON_MOD_VERSION);
54 static int dbglevel = CL_ANN;
55 module_param_named(dlevel, dbglevel, int, 0);
56 MODULE_PARM_DESC(dlevel, "Debug level (default=0)");
58 EXPORT_SYMBOL(mraid_mm_register_adp);
59 EXPORT_SYMBOL(mraid_mm_unregister_adp);
60 EXPORT_SYMBOL(mraid_mm_adapter_app_handle);
63 static uint32_t drvr_ver = 0x02200207;
65 static int adapters_count_g;
66 static struct list_head adapters_list_g;
68 static wait_queue_head_t wait_q;
70 static const struct file_operations lsi_fops = {
71 .open = mraid_mm_open,
72 .ioctl = mraid_mm_ioctl,
74 .compat_ioctl = mraid_mm_compat_ioctl,
80 * mraid_mm_open - open routine for char node interface
84 * Allow ioctl operations by apps only if they have superuser privilege.
87 mraid_mm_open(struct inode *inode, struct file *filep)
90 * Only allow superuser to access private ioctl interface
92 if (!capable(CAP_SYS_ADMIN)) return (-EACCES);
98 * mraid_mm_ioctl - module entry-point for ioctls
99 * @inode : inode (ignored)
100 * @filep : file operations pointer (ignored)
101 * @cmd : ioctl command
102 * @arg : user ioctl packet
105 mraid_mm_ioctl(struct inode *inode, struct file *filep, unsigned int cmd,
109 char signature[EXT_IOCTL_SIGN_SZ] = {0};
114 void __user *argp = (void __user *)arg;
117 * Make sure only USCSICMD are issued through this interface.
118 * MIMD application would still fire different command.
121 if ((_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD)) {
126 * Look for signature to see if this is the new or old ioctl format.
128 if (copy_from_user(signature, argp, EXT_IOCTL_SIGN_SZ)) {
129 con_log(CL_ANN, (KERN_WARNING
130 "megaraid cmm: copy from usr addr failed\n"));
134 if (memcmp(signature, EXT_IOCTL_SIGN, EXT_IOCTL_SIGN_SZ) == 0)
140 * At present, we don't support the new ioctl packet
146 * If it is a driver ioctl (as opposed to fw ioctls), then we can
147 * handle the command locally. rval > 0 means it is not a drvr cmd
149 rval = handle_drvrcmd(argp, old_ioctl, &drvrcmd_rval);
157 if ((adp = mraid_mm_get_adapter(argp, &rval)) == NULL) {
162 * Check if adapter can accept ioctl. We may have marked it offline
163 * if any previous kioc had timedout on this controller.
165 if (!adp->quiescent) {
166 con_log(CL_ANN, (KERN_WARNING
167 "megaraid cmm: controller cannot accept cmds due to "
168 "earlier errors\n" ));
173 * The following call will block till a kioc is available
175 kioc = mraid_mm_alloc_kioc(adp);
178 * User sent the old mimd_t ioctl packet. Convert it to uioc_t.
180 if ((rval = mimd_to_kioc(argp, adp, kioc))) {
181 mraid_mm_dealloc_kioc(adp, kioc);
185 kioc->done = ioctl_done;
188 * Issue the IOCTL to the low level driver. After the IOCTL completes
189 * release the kioc if and only if it was _not_ timedout. If it was
190 * timedout, that means that resources are still with low level driver.
192 if ((rval = lld_ioctl(adp, kioc))) {
195 mraid_mm_dealloc_kioc(adp, kioc);
201 * Convert the kioc back to user space
203 rval = kioc_to_mimd(kioc, argp);
206 * Return the kioc to free pool
208 mraid_mm_dealloc_kioc(adp, kioc);
215 * mraid_mm_get_adapter - Returns corresponding adapters for the mimd packet
216 * @umimd : User space mimd_t ioctl packet
217 * @rval : returned success/error status
219 * The function return value is a pointer to the located @adapter.
221 static mraid_mmadp_t *
222 mraid_mm_get_adapter(mimd_t __user *umimd, int *rval)
224 mraid_mmadp_t *adapter;
230 if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) {
235 adapno = GETADAP(mimd.ui.fcs.adapno);
237 if (adapno >= adapters_count_g) {
245 list_for_each_entry(adapter, &adapters_list_g, list) {
246 if (iterator++ == adapno) break;
258 * handle_drvrcmd - Checks if the opcode is a driver cmd and if it is, handles it.
259 * @arg : packet sent by the user app
260 * @old_ioctl : mimd if 1; uioc otherwise
261 * @rval : pointer for command's returned value (not function status)
264 handle_drvrcmd(void __user *arg, uint8_t old_ioctl, int *rval)
266 mimd_t __user *umimd;
283 if (copy_from_user(&kmimd, umimd, sizeof(mimd_t)))
286 opcode = kmimd.ui.fcs.opcode;
287 subopcode = kmimd.ui.fcs.subopcode;
290 * If the opcode is 0x82 and the subopcode is either GET_DRVRVER or
291 * GET_NUMADP, then we can handle. Otherwise we should return 1 to
292 * indicate that we cannot handle this.
299 case MEGAIOC_QDRVRVER:
301 if (copy_to_user(kmimd.data, &drvr_ver, sizeof(uint32_t)))
308 *rval = adapters_count_g;
310 if (copy_to_user(kmimd.data, &adapters_count_g,
326 * mimd_to_kioc - Converter from old to new ioctl format
327 * @umimd : user space old MIMD IOCTL
328 * @adp : adapter softstate
329 * @kioc : kernel space new format IOCTL
331 * Routine to convert MIMD interface IOCTL to new interface IOCTL packet. The
332 * new packet is in kernel space so that driver can perform operations on it
337 mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc)
341 mraid_passthru_t *pthru32;
347 if (copy_from_user(&mimd, umimd, sizeof(mimd_t)))
351 * Applications are not allowed to send extd pthru
353 if ((mimd.mbox[0] == MBOXCMD_PASSTHRU64) ||
354 (mimd.mbox[0] == MBOXCMD_EXTPTHRU))
357 opcode = mimd.ui.fcs.opcode;
358 subopcode = mimd.ui.fcs.subopcode;
359 adapno = GETADAP(mimd.ui.fcs.adapno);
361 if (adapno >= adapters_count_g)
364 kioc->adapno = adapno;
365 kioc->mb_type = MBOX_LEGACY;
366 kioc->app_type = APPTYPE_MIMD;
372 if (subopcode == MEGAIOC_QADAPINFO) {
374 kioc->opcode = GET_ADAP_INFO;
375 kioc->data_dir = UIOC_RD;
376 kioc->xferlen = sizeof(mraid_hba_info_t);
378 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
382 con_log(CL_ANN, (KERN_WARNING
383 "megaraid cmm: Invalid subop\n"));
391 kioc->opcode = MBOX_CMD;
392 kioc->xferlen = mimd.ui.fcs.length;
393 kioc->user_data_len = kioc->xferlen;
394 kioc->user_data = mimd.ui.fcs.buffer;
396 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
399 if (mimd.outlen) kioc->data_dir = UIOC_RD;
400 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
406 kioc->opcode = MBOX_CMD;
407 kioc->xferlen = (mimd.outlen > mimd.inlen) ?
408 mimd.outlen : mimd.inlen;
409 kioc->user_data_len = kioc->xferlen;
410 kioc->user_data = mimd.data;
412 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
415 if (mimd.outlen) kioc->data_dir = UIOC_RD;
416 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
425 * If driver command, nothing else to do
431 * This is a mailbox cmd; copy the mailbox from mimd
433 mbox64 = (mbox64_t *)((unsigned long)kioc->cmdbuf);
434 mbox = &mbox64->mbox32;
435 memcpy(mbox, mimd.mbox, 14);
437 if (mbox->cmd != MBOXCMD_PASSTHRU) { // regular DCMD
439 mbox->xferaddr = (uint32_t)kioc->buf_paddr;
441 if (kioc->data_dir & UIOC_WR) {
442 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
452 * This is a regular 32-bit pthru cmd; mbox points to pthru struct.
453 * Just like in above case, the beginning for memblk is treated as
454 * a mailbox. The passthru will begin at next 1K boundary. And the
455 * data will start 1K after that.
457 pthru32 = kioc->pthru32;
458 kioc->user_pthru = &umimd->pthru;
459 mbox->xferaddr = (uint32_t)kioc->pthru32_h;
461 if (copy_from_user(pthru32, kioc->user_pthru,
462 sizeof(mraid_passthru_t))) {
466 pthru32->dataxferaddr = kioc->buf_paddr;
467 if (kioc->data_dir & UIOC_WR) {
468 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
469 pthru32->dataxferlen)) {
478 * mraid_mm_attch_buf - Attach a free dma buffer for required size
479 * @adp : Adapter softstate
480 * @kioc : kioc that the buffer needs to be attached to
481 * @xferlen : required length for buffer
483 * First we search for a pool with smallest buffer that is >= @xferlen. If
484 * that pool has no free buffer, we will try for the next bigger size. If none
485 * is available, we will try to allocate the smallest buffer that is >=
486 * @xferlen and attach it the pool.
489 mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen)
496 kioc->pool_index = -1;
497 kioc->buf_vaddr = NULL;
502 * We need xferlen amount of memory. See if we can get it from our
503 * dma pools. If we don't get exact size, we will try bigger buffer
506 for (i = 0; i < MAX_DMA_POOLS; i++) {
508 pool = &adp->dma_pool_list[i];
510 if (xferlen > pool->buf_size)
513 if (right_pool == -1)
516 spin_lock_irqsave(&pool->lock, flags);
521 kioc->pool_index = i;
522 kioc->buf_vaddr = pool->vaddr;
523 kioc->buf_paddr = pool->paddr;
525 spin_unlock_irqrestore(&pool->lock, flags);
529 spin_unlock_irqrestore(&pool->lock, flags);
535 * If xferlen doesn't match any of our pools, return error
537 if (right_pool == -1)
541 * We did not get any buffer from the preallocated pool. Let us try
542 * to allocate one new buffer. NOTE: This is a blocking call.
544 pool = &adp->dma_pool_list[right_pool];
546 spin_lock_irqsave(&pool->lock, flags);
548 kioc->pool_index = right_pool;
550 kioc->buf_vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL,
552 spin_unlock_irqrestore(&pool->lock, flags);
554 if (!kioc->buf_vaddr)
561 * mraid_mm_alloc_kioc - Returns a uioc_t from free list
562 * @adp : Adapter softstate for this module
564 * The kioc_semaphore is initialized with number of kioc nodes in the
565 * free kioc pool. If the kioc pool is empty, this function blocks till
566 * a kioc becomes free.
569 mraid_mm_alloc_kioc(mraid_mmadp_t *adp)
572 struct list_head* head;
575 down(&adp->kioc_semaphore);
577 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
579 head = &adp->kioc_pool;
581 if (list_empty(head)) {
582 up(&adp->kioc_semaphore);
583 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
585 con_log(CL_ANN, ("megaraid cmm: kioc list empty!\n"));
589 kioc = list_entry(head->next, uioc_t, list);
590 list_del_init(&kioc->list);
592 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
594 memset((caddr_t)(unsigned long)kioc->cmdbuf, 0, sizeof(mbox64_t));
595 memset((caddr_t) kioc->pthru32, 0, sizeof(mraid_passthru_t));
597 kioc->buf_vaddr = NULL;
599 kioc->pool_index =-1;
601 kioc->user_data = NULL;
602 kioc->user_data_len = 0;
603 kioc->user_pthru = NULL;
610 * mraid_mm_dealloc_kioc - Return kioc to free pool
611 * @adp : Adapter softstate
612 * @kioc : uioc_t node to be returned to free pool
615 mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc)
620 if (kioc->pool_index != -1) {
621 pool = &adp->dma_pool_list[kioc->pool_index];
623 /* This routine may be called in non-isr context also */
624 spin_lock_irqsave(&pool->lock, flags);
627 * While attaching the dma buffer, if we didn't get the
628 * required buffer from the pool, we would have allocated
629 * it at the run time and set the free_buf flag. We must
630 * free that buffer. Otherwise, just mark that the buffer is
633 if (kioc->free_buf == 1)
634 pci_pool_free(pool->handle, kioc->buf_vaddr,
639 spin_unlock_irqrestore(&pool->lock, flags);
642 /* Return the kioc to the free pool */
643 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
644 list_add(&kioc->list, &adp->kioc_pool);
645 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
647 /* increment the free kioc count */
648 up(&adp->kioc_semaphore);
654 * lld_ioctl - Routine to issue ioctl to low level drvr
655 * @adp : The adapter handle
656 * @kioc : The ioctl packet with kernel addresses
659 lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc)
662 struct timer_list timer;
663 struct timer_list *tp = NULL;
665 kioc->status = -ENODATA;
666 rval = adp->issue_uioc(adp->drvr_data, kioc, IOCTL_ISSUE);
668 if (rval) return rval;
673 if (adp->timeout > 0) {
677 tp->function = lld_timedout;
678 tp->data = (unsigned long)kioc;
679 tp->expires = jiffies + adp->timeout * HZ;
685 * Wait till the low level driver completes the ioctl. After this
686 * call, the ioctl either completed successfully or timedout.
688 wait_event(wait_q, (kioc->status != -ENODATA));
694 * If the command had timedout, we mark the controller offline
697 if (kioc->timedout) {
706 * ioctl_done - callback from the low level driver
707 * @kioc : completed ioctl packet
710 ioctl_done(uioc_t *kioc)
714 mraid_mmadp_t* adapter;
717 * When the kioc returns from driver, make sure it still doesn't
718 * have ENODATA in status. Otherwise, driver will hang on wait_event
721 if (kioc->status == -ENODATA) {
722 con_log(CL_ANN, (KERN_WARNING
723 "megaraid cmm: lld didn't change status!\n"));
725 kioc->status = -EINVAL;
729 * Check if this kioc was timedout before. If so, nobody is waiting
730 * on this kioc. We don't have to wake up anybody. Instead, we just
731 * have to free the kioc
733 if (kioc->timedout) {
736 adapno = kioc->adapno;
738 con_log(CL_ANN, ( KERN_WARNING "megaraid cmm: completed "
739 "ioctl that was timedout before\n"));
741 list_for_each_entry(adapter, &adapters_list_g, list) {
742 if (iterator++ == adapno) break;
748 mraid_mm_dealloc_kioc( adapter, kioc );
758 * lld_timedout - callback from the expired timer
759 * @ptr : ioctl packet that timed out
762 lld_timedout(unsigned long ptr)
764 uioc_t *kioc = (uioc_t *)ptr;
766 kioc->status = -ETIME;
769 con_log(CL_ANN, (KERN_WARNING "megaraid cmm: ioctl timed out\n"));
776 * kioc_to_mimd - Converter from new back to old format
777 * @kioc : Kernel space IOCTL packet (successfully issued)
778 * @mimd : User space MIMD packet
781 kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd)
788 mraid_passthru_t __user *upthru32;
789 mraid_passthru_t *kpthru32;
791 mraid_hba_info_t *hinfo;
794 if (copy_from_user(&kmimd, mimd, sizeof(mimd_t)))
797 opcode = kmimd.ui.fcs.opcode;
798 subopcode = kmimd.ui.fcs.subopcode;
800 if (opcode == 0x82) {
803 case MEGAIOC_QADAPINFO:
805 hinfo = (mraid_hba_info_t *)(unsigned long)
808 hinfo_to_cinfo(hinfo, &cinfo);
810 if (copy_to_user(kmimd.data, &cinfo, sizeof(cinfo)))
822 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
824 if (kioc->user_pthru) {
826 upthru32 = kioc->user_pthru;
827 kpthru32 = kioc->pthru32;
829 if (copy_to_user(&upthru32->scsistatus,
830 &kpthru32->scsistatus,
836 if (kioc->user_data) {
837 if (copy_to_user(kioc->user_data, kioc->buf_vaddr,
838 kioc->user_data_len)) {
843 if (copy_to_user(&mimd->mbox[17],
844 &mbox64->mbox32.status, sizeof(uint8_t))) {
853 * hinfo_to_cinfo - Convert new format hba info into old format
854 * @hinfo : New format, more comprehensive adapter info
855 * @cinfo : Old format adapter info to support mimd_t apps
858 hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo)
860 if (!hinfo || !cinfo)
863 cinfo->base = hinfo->baseport;
864 cinfo->irq = hinfo->irq;
865 cinfo->numldrv = hinfo->num_ldrv;
866 cinfo->pcibus = hinfo->pci_bus;
867 cinfo->pcidev = hinfo->pci_slot;
868 cinfo->pcifun = PCI_FUNC(hinfo->pci_dev_fn);
869 cinfo->pciid = hinfo->pci_device_id;
870 cinfo->pcivendor = hinfo->pci_vendor_id;
871 cinfo->pcislot = hinfo->pci_slot;
872 cinfo->uid = hinfo->unique_id;
877 * mraid_mm_register_adp - Registration routine for low level drivers
878 * @lld_adp : Adapter objejct
881 mraid_mm_register_adp(mraid_mmadp_t *lld_adp)
883 mraid_mmadp_t *adapter;
890 if (lld_adp->drvr_type != DRVRTYPE_MBOX)
893 adapter = kmalloc(sizeof(mraid_mmadp_t), GFP_KERNEL);
898 memset(adapter, 0, sizeof(mraid_mmadp_t));
900 adapter->unique_id = lld_adp->unique_id;
901 adapter->drvr_type = lld_adp->drvr_type;
902 adapter->drvr_data = lld_adp->drvr_data;
903 adapter->pdev = lld_adp->pdev;
904 adapter->issue_uioc = lld_adp->issue_uioc;
905 adapter->timeout = lld_adp->timeout;
906 adapter->max_kioc = lld_adp->max_kioc;
907 adapter->quiescent = 1;
910 * Allocate single blocks of memory for all required kiocs,
911 * mailboxes and passthru structures.
913 adapter->kioc_list = kmalloc(sizeof(uioc_t) * lld_adp->max_kioc,
915 adapter->mbox_list = kmalloc(sizeof(mbox64_t) * lld_adp->max_kioc,
917 adapter->pthru_dma_pool = pci_pool_create("megaraid mm pthru pool",
919 sizeof(mraid_passthru_t),
922 if (!adapter->kioc_list || !adapter->mbox_list ||
923 !adapter->pthru_dma_pool) {
925 con_log(CL_ANN, (KERN_WARNING
926 "megaraid cmm: out of memory, %s %d\n", __FUNCTION__,
935 * Slice kioc_list and make a kioc_pool with the individiual kiocs
937 INIT_LIST_HEAD(&adapter->kioc_pool);
938 spin_lock_init(&adapter->kioc_pool_lock);
939 sema_init(&adapter->kioc_semaphore, lld_adp->max_kioc);
941 mbox_list = (mbox64_t *)adapter->mbox_list;
943 for (i = 0; i < lld_adp->max_kioc; i++) {
945 kioc = adapter->kioc_list + i;
946 kioc->cmdbuf = (uint64_t)(unsigned long)(mbox_list + i);
947 kioc->pthru32 = pci_pool_alloc(adapter->pthru_dma_pool,
948 GFP_KERNEL, &kioc->pthru32_h);
950 if (!kioc->pthru32) {
952 con_log(CL_ANN, (KERN_WARNING
953 "megaraid cmm: out of memory, %s %d\n",
954 __FUNCTION__, __LINE__));
958 goto pthru_dma_pool_error;
961 list_add_tail(&kioc->list, &adapter->kioc_pool);
964 // Setup the dma pools for data buffers
965 if ((rval = mraid_mm_setup_dma_pools(adapter)) != 0) {
969 list_add_tail(&adapter->list, &adapters_list_g);
978 pthru_dma_pool_error:
980 for (i = 0; i < lld_adp->max_kioc; i++) {
981 kioc = adapter->kioc_list + i;
983 pci_pool_free(adapter->pthru_dma_pool, kioc->pthru32,
990 kfree(adapter->kioc_list);
991 kfree(adapter->mbox_list);
993 if (adapter->pthru_dma_pool)
994 pci_pool_destroy(adapter->pthru_dma_pool);
1003 * mraid_mm_adapter_app_handle - return the application handle for this adapter
1004 * @unique_id : adapter unique identifier
1006 * For the given driver data, locate the adapter in our global list and
1007 * return the corresponding handle, which is also used by applications to
1008 * uniquely identify an adapter.
1010 * Return adapter handle if found in the list.
1011 * Return 0 if adapter could not be located, should never happen though.
1014 mraid_mm_adapter_app_handle(uint32_t unique_id)
1016 mraid_mmadp_t *adapter;
1020 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1022 if (adapter->unique_id == unique_id) {
1024 return MKADAP(index);
1035 * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter
1036 * @adp : Adapter softstate
1038 * We maintain a pool of dma buffers per each adapter. Each pool has one
1039 * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers.
1040 * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We
1041 * dont' want to waste too much memory by allocating more buffers per each
1045 mraid_mm_setup_dma_pools(mraid_mmadp_t *adp)
1052 * Create MAX_DMA_POOLS number of pools
1054 bufsize = MRAID_MM_INIT_BUFF_SIZE;
1056 for (i = 0; i < MAX_DMA_POOLS; i++){
1058 pool = &adp->dma_pool_list[i];
1060 pool->buf_size = bufsize;
1061 spin_lock_init(&pool->lock);
1063 pool->handle = pci_pool_create("megaraid mm data buffer",
1064 adp->pdev, bufsize, 16, 0);
1066 if (!pool->handle) {
1067 goto dma_pool_setup_error;
1070 pool->vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL,
1074 goto dma_pool_setup_error;
1076 bufsize = bufsize * 2;
1081 dma_pool_setup_error:
1083 mraid_mm_teardown_dma_pools(adp);
1089 * mraid_mm_unregister_adp - Unregister routine for low level drivers
1090 * @unique_id : UID of the adpater
1092 * Assumes no outstanding ioctls to llds.
1095 mraid_mm_unregister_adp(uint32_t unique_id)
1097 mraid_mmadp_t *adapter;
1100 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1103 if (adapter->unique_id == unique_id) {
1107 list_del_init(&adapter->list);
1109 mraid_mm_free_adp_resources(adapter);
1114 "megaraid cmm: Unregistered one adapter:%#x\n",
1125 * mraid_mm_free_adp_resources - Free adapter softstate
1126 * @adp : Adapter softstate
1129 mraid_mm_free_adp_resources(mraid_mmadp_t *adp)
1134 mraid_mm_teardown_dma_pools(adp);
1136 for (i = 0; i < adp->max_kioc; i++) {
1138 kioc = adp->kioc_list + i;
1140 pci_pool_free(adp->pthru_dma_pool, kioc->pthru32,
1144 kfree(adp->kioc_list);
1145 kfree(adp->mbox_list);
1147 pci_pool_destroy(adp->pthru_dma_pool);
1155 * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers
1156 * @adp : Adapter softstate
1159 mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp)
1164 for (i = 0; i < MAX_DMA_POOLS; i++) {
1166 pool = &adp->dma_pool_list[i];
1171 pci_pool_free(pool->handle, pool->vaddr,
1174 pci_pool_destroy(pool->handle);
1175 pool->handle = NULL;
1183 * mraid_mm_init - Module entry point
1188 // Announce the driver version
1189 con_log(CL_ANN, (KERN_INFO "megaraid cmm: %s %s\n",
1190 LSI_COMMON_MOD_VERSION, LSI_COMMON_MOD_EXT_VERSION));
1192 majorno = register_chrdev(0, "megadev", &lsi_fops);
1195 con_log(CL_ANN, ("megaraid cmm: cannot get major\n"));
1199 init_waitqueue_head(&wait_q);
1201 INIT_LIST_HEAD(&adapters_list_g);
1207 #ifdef CONFIG_COMPAT
1209 * mraid_mm_compat_ioctl - 32bit to 64bit ioctl conversion routine
1210 * @filep : file operations pointer (ignored)
1211 * @cmd : ioctl command
1212 * @arg : user ioctl packet
1215 mraid_mm_compat_ioctl(struct file *filep, unsigned int cmd,
1220 err = mraid_mm_ioctl(NULL, filep, cmd, arg);
1227 * mraid_mm_exit - Module exit point
1232 con_log(CL_DLEVEL1 , ("exiting common mod\n"));
1234 unregister_chrdev(majorno, "megadev");
1237 module_init(mraid_mm_init);
1238 module_exit(mraid_mm_exit);
1240 /* vi: set ts=8 sw=8 tw=78: */