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 "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);
62 static uint32_t drvr_ver = 0x02200207;
64 static int adapters_count_g;
65 static struct list_head adapters_list_g;
67 static wait_queue_head_t wait_q;
69 static const struct file_operations lsi_fops = {
70 .open = mraid_mm_open,
71 .ioctl = mraid_mm_ioctl,
73 .compat_ioctl = mraid_mm_compat_ioctl,
78 static struct miscdevice megaraid_mm_dev = {
79 .minor = MISC_DYNAMIC_MINOR,
85 * mraid_mm_open - open routine for char node interface
89 * Allow ioctl operations by apps only if they have superuser privilege.
92 mraid_mm_open(struct inode *inode, struct file *filep)
95 * Only allow superuser to access private ioctl interface
97 if (!capable(CAP_SYS_ADMIN)) return (-EACCES);
103 * mraid_mm_ioctl - module entry-point for ioctls
104 * @inode : inode (ignored)
105 * @filep : file operations pointer (ignored)
106 * @cmd : ioctl command
107 * @arg : user ioctl packet
110 mraid_mm_ioctl(struct inode *inode, struct file *filep, unsigned int cmd,
114 char signature[EXT_IOCTL_SIGN_SZ] = {0};
119 void __user *argp = (void __user *)arg;
122 * Make sure only USCSICMD are issued through this interface.
123 * MIMD application would still fire different command.
126 if ((_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD)) {
131 * Look for signature to see if this is the new or old ioctl format.
133 if (copy_from_user(signature, argp, EXT_IOCTL_SIGN_SZ)) {
134 con_log(CL_ANN, (KERN_WARNING
135 "megaraid cmm: copy from usr addr failed\n"));
139 if (memcmp(signature, EXT_IOCTL_SIGN, EXT_IOCTL_SIGN_SZ) == 0)
145 * At present, we don't support the new ioctl packet
151 * If it is a driver ioctl (as opposed to fw ioctls), then we can
152 * handle the command locally. rval > 0 means it is not a drvr cmd
154 rval = handle_drvrcmd(argp, old_ioctl, &drvrcmd_rval);
162 if ((adp = mraid_mm_get_adapter(argp, &rval)) == NULL) {
167 * Check if adapter can accept ioctl. We may have marked it offline
168 * if any previous kioc had timedout on this controller.
170 if (!adp->quiescent) {
171 con_log(CL_ANN, (KERN_WARNING
172 "megaraid cmm: controller cannot accept cmds due to "
173 "earlier errors\n" ));
178 * The following call will block till a kioc is available
180 kioc = mraid_mm_alloc_kioc(adp);
183 * User sent the old mimd_t ioctl packet. Convert it to uioc_t.
185 if ((rval = mimd_to_kioc(argp, adp, kioc))) {
186 mraid_mm_dealloc_kioc(adp, kioc);
190 kioc->done = ioctl_done;
193 * Issue the IOCTL to the low level driver. After the IOCTL completes
194 * release the kioc if and only if it was _not_ timedout. If it was
195 * timedout, that means that resources are still with low level driver.
197 if ((rval = lld_ioctl(adp, kioc))) {
200 mraid_mm_dealloc_kioc(adp, kioc);
206 * Convert the kioc back to user space
208 rval = kioc_to_mimd(kioc, argp);
211 * Return the kioc to free pool
213 mraid_mm_dealloc_kioc(adp, kioc);
220 * mraid_mm_get_adapter - Returns corresponding adapters for the mimd packet
221 * @umimd : User space mimd_t ioctl packet
222 * @rval : returned success/error status
224 * The function return value is a pointer to the located @adapter.
226 static mraid_mmadp_t *
227 mraid_mm_get_adapter(mimd_t __user *umimd, int *rval)
229 mraid_mmadp_t *adapter;
235 if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) {
240 adapno = GETADAP(mimd.ui.fcs.adapno);
242 if (adapno >= adapters_count_g) {
250 list_for_each_entry(adapter, &adapters_list_g, list) {
251 if (iterator++ == adapno) break;
263 * handle_drvrcmd - Checks if the opcode is a driver cmd and if it is, handles it.
264 * @arg : packet sent by the user app
265 * @old_ioctl : mimd if 1; uioc otherwise
266 * @rval : pointer for command's returned value (not function status)
269 handle_drvrcmd(void __user *arg, uint8_t old_ioctl, int *rval)
271 mimd_t __user *umimd;
288 if (copy_from_user(&kmimd, umimd, sizeof(mimd_t)))
291 opcode = kmimd.ui.fcs.opcode;
292 subopcode = kmimd.ui.fcs.subopcode;
295 * If the opcode is 0x82 and the subopcode is either GET_DRVRVER or
296 * GET_NUMADP, then we can handle. Otherwise we should return 1 to
297 * indicate that we cannot handle this.
304 case MEGAIOC_QDRVRVER:
306 if (copy_to_user(kmimd.data, &drvr_ver, sizeof(uint32_t)))
313 *rval = adapters_count_g;
315 if (copy_to_user(kmimd.data, &adapters_count_g,
331 * mimd_to_kioc - Converter from old to new ioctl format
332 * @umimd : user space old MIMD IOCTL
333 * @adp : adapter softstate
334 * @kioc : kernel space new format IOCTL
336 * Routine to convert MIMD interface IOCTL to new interface IOCTL packet. The
337 * new packet is in kernel space so that driver can perform operations on it
342 mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc)
346 mraid_passthru_t *pthru32;
352 if (copy_from_user(&mimd, umimd, sizeof(mimd_t)))
356 * Applications are not allowed to send extd pthru
358 if ((mimd.mbox[0] == MBOXCMD_PASSTHRU64) ||
359 (mimd.mbox[0] == MBOXCMD_EXTPTHRU))
362 opcode = mimd.ui.fcs.opcode;
363 subopcode = mimd.ui.fcs.subopcode;
364 adapno = GETADAP(mimd.ui.fcs.adapno);
366 if (adapno >= adapters_count_g)
369 kioc->adapno = adapno;
370 kioc->mb_type = MBOX_LEGACY;
371 kioc->app_type = APPTYPE_MIMD;
377 if (subopcode == MEGAIOC_QADAPINFO) {
379 kioc->opcode = GET_ADAP_INFO;
380 kioc->data_dir = UIOC_RD;
381 kioc->xferlen = sizeof(mraid_hba_info_t);
383 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
387 con_log(CL_ANN, (KERN_WARNING
388 "megaraid cmm: Invalid subop\n"));
396 kioc->opcode = MBOX_CMD;
397 kioc->xferlen = mimd.ui.fcs.length;
398 kioc->user_data_len = kioc->xferlen;
399 kioc->user_data = mimd.ui.fcs.buffer;
401 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
404 if (mimd.outlen) kioc->data_dir = UIOC_RD;
405 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
411 kioc->opcode = MBOX_CMD;
412 kioc->xferlen = (mimd.outlen > mimd.inlen) ?
413 mimd.outlen : mimd.inlen;
414 kioc->user_data_len = kioc->xferlen;
415 kioc->user_data = mimd.data;
417 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
420 if (mimd.outlen) kioc->data_dir = UIOC_RD;
421 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
430 * If driver command, nothing else to do
436 * This is a mailbox cmd; copy the mailbox from mimd
438 mbox64 = (mbox64_t *)((unsigned long)kioc->cmdbuf);
439 mbox = &mbox64->mbox32;
440 memcpy(mbox, mimd.mbox, 14);
442 if (mbox->cmd != MBOXCMD_PASSTHRU) { // regular DCMD
444 mbox->xferaddr = (uint32_t)kioc->buf_paddr;
446 if (kioc->data_dir & UIOC_WR) {
447 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
457 * This is a regular 32-bit pthru cmd; mbox points to pthru struct.
458 * Just like in above case, the beginning for memblk is treated as
459 * a mailbox. The passthru will begin at next 1K boundary. And the
460 * data will start 1K after that.
462 pthru32 = kioc->pthru32;
463 kioc->user_pthru = &umimd->pthru;
464 mbox->xferaddr = (uint32_t)kioc->pthru32_h;
466 if (copy_from_user(pthru32, kioc->user_pthru,
467 sizeof(mraid_passthru_t))) {
471 pthru32->dataxferaddr = kioc->buf_paddr;
472 if (kioc->data_dir & UIOC_WR) {
473 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
474 pthru32->dataxferlen)) {
483 * mraid_mm_attch_buf - Attach a free dma buffer for required size
484 * @adp : Adapter softstate
485 * @kioc : kioc that the buffer needs to be attached to
486 * @xferlen : required length for buffer
488 * First we search for a pool with smallest buffer that is >= @xferlen. If
489 * that pool has no free buffer, we will try for the next bigger size. If none
490 * is available, we will try to allocate the smallest buffer that is >=
491 * @xferlen and attach it the pool.
494 mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen)
501 kioc->pool_index = -1;
502 kioc->buf_vaddr = NULL;
507 * We need xferlen amount of memory. See if we can get it from our
508 * dma pools. If we don't get exact size, we will try bigger buffer
511 for (i = 0; i < MAX_DMA_POOLS; i++) {
513 pool = &adp->dma_pool_list[i];
515 if (xferlen > pool->buf_size)
518 if (right_pool == -1)
521 spin_lock_irqsave(&pool->lock, flags);
526 kioc->pool_index = i;
527 kioc->buf_vaddr = pool->vaddr;
528 kioc->buf_paddr = pool->paddr;
530 spin_unlock_irqrestore(&pool->lock, flags);
534 spin_unlock_irqrestore(&pool->lock, flags);
540 * If xferlen doesn't match any of our pools, return error
542 if (right_pool == -1)
546 * We did not get any buffer from the preallocated pool. Let us try
547 * to allocate one new buffer. NOTE: This is a blocking call.
549 pool = &adp->dma_pool_list[right_pool];
551 spin_lock_irqsave(&pool->lock, flags);
553 kioc->pool_index = right_pool;
555 kioc->buf_vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL,
557 spin_unlock_irqrestore(&pool->lock, flags);
559 if (!kioc->buf_vaddr)
566 * mraid_mm_alloc_kioc - Returns a uioc_t from free list
567 * @adp : Adapter softstate for this module
569 * The kioc_semaphore is initialized with number of kioc nodes in the
570 * free kioc pool. If the kioc pool is empty, this function blocks till
571 * a kioc becomes free.
574 mraid_mm_alloc_kioc(mraid_mmadp_t *adp)
577 struct list_head* head;
580 down(&adp->kioc_semaphore);
582 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
584 head = &adp->kioc_pool;
586 if (list_empty(head)) {
587 up(&adp->kioc_semaphore);
588 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
590 con_log(CL_ANN, ("megaraid cmm: kioc list empty!\n"));
594 kioc = list_entry(head->next, uioc_t, list);
595 list_del_init(&kioc->list);
597 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
599 memset((caddr_t)(unsigned long)kioc->cmdbuf, 0, sizeof(mbox64_t));
600 memset((caddr_t) kioc->pthru32, 0, sizeof(mraid_passthru_t));
602 kioc->buf_vaddr = NULL;
604 kioc->pool_index =-1;
606 kioc->user_data = NULL;
607 kioc->user_data_len = 0;
608 kioc->user_pthru = NULL;
615 * mraid_mm_dealloc_kioc - Return kioc to free pool
616 * @adp : Adapter softstate
617 * @kioc : uioc_t node to be returned to free pool
620 mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc)
625 if (kioc->pool_index != -1) {
626 pool = &adp->dma_pool_list[kioc->pool_index];
628 /* This routine may be called in non-isr context also */
629 spin_lock_irqsave(&pool->lock, flags);
632 * While attaching the dma buffer, if we didn't get the
633 * required buffer from the pool, we would have allocated
634 * it at the run time and set the free_buf flag. We must
635 * free that buffer. Otherwise, just mark that the buffer is
638 if (kioc->free_buf == 1)
639 pci_pool_free(pool->handle, kioc->buf_vaddr,
644 spin_unlock_irqrestore(&pool->lock, flags);
647 /* Return the kioc to the free pool */
648 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
649 list_add(&kioc->list, &adp->kioc_pool);
650 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
652 /* increment the free kioc count */
653 up(&adp->kioc_semaphore);
659 * lld_ioctl - Routine to issue ioctl to low level drvr
660 * @adp : The adapter handle
661 * @kioc : The ioctl packet with kernel addresses
664 lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc)
667 struct timer_list timer;
668 struct timer_list *tp = NULL;
670 kioc->status = -ENODATA;
671 rval = adp->issue_uioc(adp->drvr_data, kioc, IOCTL_ISSUE);
673 if (rval) return rval;
678 if (adp->timeout > 0) {
682 tp->function = lld_timedout;
683 tp->data = (unsigned long)kioc;
684 tp->expires = jiffies + adp->timeout * HZ;
690 * Wait till the low level driver completes the ioctl. After this
691 * call, the ioctl either completed successfully or timedout.
693 wait_event(wait_q, (kioc->status != -ENODATA));
699 * If the command had timedout, we mark the controller offline
702 if (kioc->timedout) {
711 * ioctl_done - callback from the low level driver
712 * @kioc : completed ioctl packet
715 ioctl_done(uioc_t *kioc)
719 mraid_mmadp_t* adapter;
722 * When the kioc returns from driver, make sure it still doesn't
723 * have ENODATA in status. Otherwise, driver will hang on wait_event
726 if (kioc->status == -ENODATA) {
727 con_log(CL_ANN, (KERN_WARNING
728 "megaraid cmm: lld didn't change status!\n"));
730 kioc->status = -EINVAL;
734 * Check if this kioc was timedout before. If so, nobody is waiting
735 * on this kioc. We don't have to wake up anybody. Instead, we just
736 * have to free the kioc
738 if (kioc->timedout) {
741 adapno = kioc->adapno;
743 con_log(CL_ANN, ( KERN_WARNING "megaraid cmm: completed "
744 "ioctl that was timedout before\n"));
746 list_for_each_entry(adapter, &adapters_list_g, list) {
747 if (iterator++ == adapno) break;
753 mraid_mm_dealloc_kioc( adapter, kioc );
763 * lld_timedout - callback from the expired timer
764 * @ptr : ioctl packet that timed out
767 lld_timedout(unsigned long ptr)
769 uioc_t *kioc = (uioc_t *)ptr;
771 kioc->status = -ETIME;
774 con_log(CL_ANN, (KERN_WARNING "megaraid cmm: ioctl timed out\n"));
781 * kioc_to_mimd - Converter from new back to old format
782 * @kioc : Kernel space IOCTL packet (successfully issued)
783 * @mimd : User space MIMD packet
786 kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd)
793 mraid_passthru_t __user *upthru32;
794 mraid_passthru_t *kpthru32;
796 mraid_hba_info_t *hinfo;
799 if (copy_from_user(&kmimd, mimd, sizeof(mimd_t)))
802 opcode = kmimd.ui.fcs.opcode;
803 subopcode = kmimd.ui.fcs.subopcode;
805 if (opcode == 0x82) {
808 case MEGAIOC_QADAPINFO:
810 hinfo = (mraid_hba_info_t *)(unsigned long)
813 hinfo_to_cinfo(hinfo, &cinfo);
815 if (copy_to_user(kmimd.data, &cinfo, sizeof(cinfo)))
827 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
829 if (kioc->user_pthru) {
831 upthru32 = kioc->user_pthru;
832 kpthru32 = kioc->pthru32;
834 if (copy_to_user(&upthru32->scsistatus,
835 &kpthru32->scsistatus,
841 if (kioc->user_data) {
842 if (copy_to_user(kioc->user_data, kioc->buf_vaddr,
843 kioc->user_data_len)) {
848 if (copy_to_user(&mimd->mbox[17],
849 &mbox64->mbox32.status, sizeof(uint8_t))) {
858 * hinfo_to_cinfo - Convert new format hba info into old format
859 * @hinfo : New format, more comprehensive adapter info
860 * @cinfo : Old format adapter info to support mimd_t apps
863 hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo)
865 if (!hinfo || !cinfo)
868 cinfo->base = hinfo->baseport;
869 cinfo->irq = hinfo->irq;
870 cinfo->numldrv = hinfo->num_ldrv;
871 cinfo->pcibus = hinfo->pci_bus;
872 cinfo->pcidev = hinfo->pci_slot;
873 cinfo->pcifun = PCI_FUNC(hinfo->pci_dev_fn);
874 cinfo->pciid = hinfo->pci_device_id;
875 cinfo->pcivendor = hinfo->pci_vendor_id;
876 cinfo->pcislot = hinfo->pci_slot;
877 cinfo->uid = hinfo->unique_id;
882 * mraid_mm_register_adp - Registration routine for low level drivers
883 * @lld_adp : Adapter objejct
886 mraid_mm_register_adp(mraid_mmadp_t *lld_adp)
888 mraid_mmadp_t *adapter;
895 if (lld_adp->drvr_type != DRVRTYPE_MBOX)
898 adapter = kzalloc(sizeof(mraid_mmadp_t), GFP_KERNEL);
904 adapter->unique_id = lld_adp->unique_id;
905 adapter->drvr_type = lld_adp->drvr_type;
906 adapter->drvr_data = lld_adp->drvr_data;
907 adapter->pdev = lld_adp->pdev;
908 adapter->issue_uioc = lld_adp->issue_uioc;
909 adapter->timeout = lld_adp->timeout;
910 adapter->max_kioc = lld_adp->max_kioc;
911 adapter->quiescent = 1;
914 * Allocate single blocks of memory for all required kiocs,
915 * mailboxes and passthru structures.
917 adapter->kioc_list = kmalloc(sizeof(uioc_t) * lld_adp->max_kioc,
919 adapter->mbox_list = kmalloc(sizeof(mbox64_t) * lld_adp->max_kioc,
921 adapter->pthru_dma_pool = pci_pool_create("megaraid mm pthru pool",
923 sizeof(mraid_passthru_t),
926 if (!adapter->kioc_list || !adapter->mbox_list ||
927 !adapter->pthru_dma_pool) {
929 con_log(CL_ANN, (KERN_WARNING
930 "megaraid cmm: out of memory, %s %d\n", __FUNCTION__,
939 * Slice kioc_list and make a kioc_pool with the individiual kiocs
941 INIT_LIST_HEAD(&adapter->kioc_pool);
942 spin_lock_init(&adapter->kioc_pool_lock);
943 sema_init(&adapter->kioc_semaphore, lld_adp->max_kioc);
945 mbox_list = (mbox64_t *)adapter->mbox_list;
947 for (i = 0; i < lld_adp->max_kioc; i++) {
949 kioc = adapter->kioc_list + i;
950 kioc->cmdbuf = (uint64_t)(unsigned long)(mbox_list + i);
951 kioc->pthru32 = pci_pool_alloc(adapter->pthru_dma_pool,
952 GFP_KERNEL, &kioc->pthru32_h);
954 if (!kioc->pthru32) {
956 con_log(CL_ANN, (KERN_WARNING
957 "megaraid cmm: out of memory, %s %d\n",
958 __FUNCTION__, __LINE__));
962 goto pthru_dma_pool_error;
965 list_add_tail(&kioc->list, &adapter->kioc_pool);
968 // Setup the dma pools for data buffers
969 if ((rval = mraid_mm_setup_dma_pools(adapter)) != 0) {
973 list_add_tail(&adapter->list, &adapters_list_g);
982 pthru_dma_pool_error:
984 for (i = 0; i < lld_adp->max_kioc; i++) {
985 kioc = adapter->kioc_list + i;
987 pci_pool_free(adapter->pthru_dma_pool, kioc->pthru32,
994 kfree(adapter->kioc_list);
995 kfree(adapter->mbox_list);
997 if (adapter->pthru_dma_pool)
998 pci_pool_destroy(adapter->pthru_dma_pool);
1007 * mraid_mm_adapter_app_handle - return the application handle for this adapter
1008 * @unique_id : adapter unique identifier
1010 * For the given driver data, locate the adapter in our global list and
1011 * return the corresponding handle, which is also used by applications to
1012 * uniquely identify an adapter.
1014 * Return adapter handle if found in the list.
1015 * Return 0 if adapter could not be located, should never happen though.
1018 mraid_mm_adapter_app_handle(uint32_t unique_id)
1020 mraid_mmadp_t *adapter;
1024 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1026 if (adapter->unique_id == unique_id) {
1028 return MKADAP(index);
1039 * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter
1040 * @adp : Adapter softstate
1042 * We maintain a pool of dma buffers per each adapter. Each pool has one
1043 * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers.
1044 * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We
1045 * dont' want to waste too much memory by allocating more buffers per each
1049 mraid_mm_setup_dma_pools(mraid_mmadp_t *adp)
1056 * Create MAX_DMA_POOLS number of pools
1058 bufsize = MRAID_MM_INIT_BUFF_SIZE;
1060 for (i = 0; i < MAX_DMA_POOLS; i++){
1062 pool = &adp->dma_pool_list[i];
1064 pool->buf_size = bufsize;
1065 spin_lock_init(&pool->lock);
1067 pool->handle = pci_pool_create("megaraid mm data buffer",
1068 adp->pdev, bufsize, 16, 0);
1070 if (!pool->handle) {
1071 goto dma_pool_setup_error;
1074 pool->vaddr = pci_pool_alloc(pool->handle, GFP_KERNEL,
1078 goto dma_pool_setup_error;
1080 bufsize = bufsize * 2;
1085 dma_pool_setup_error:
1087 mraid_mm_teardown_dma_pools(adp);
1093 * mraid_mm_unregister_adp - Unregister routine for low level drivers
1094 * @unique_id : UID of the adpater
1096 * Assumes no outstanding ioctls to llds.
1099 mraid_mm_unregister_adp(uint32_t unique_id)
1101 mraid_mmadp_t *adapter;
1104 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1107 if (adapter->unique_id == unique_id) {
1111 list_del_init(&adapter->list);
1113 mraid_mm_free_adp_resources(adapter);
1118 "megaraid cmm: Unregistered one adapter:%#x\n",
1129 * mraid_mm_free_adp_resources - Free adapter softstate
1130 * @adp : Adapter softstate
1133 mraid_mm_free_adp_resources(mraid_mmadp_t *adp)
1138 mraid_mm_teardown_dma_pools(adp);
1140 for (i = 0; i < adp->max_kioc; i++) {
1142 kioc = adp->kioc_list + i;
1144 pci_pool_free(adp->pthru_dma_pool, kioc->pthru32,
1148 kfree(adp->kioc_list);
1149 kfree(adp->mbox_list);
1151 pci_pool_destroy(adp->pthru_dma_pool);
1159 * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers
1160 * @adp : Adapter softstate
1163 mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp)
1168 for (i = 0; i < MAX_DMA_POOLS; i++) {
1170 pool = &adp->dma_pool_list[i];
1175 pci_pool_free(pool->handle, pool->vaddr,
1178 pci_pool_destroy(pool->handle);
1179 pool->handle = NULL;
1187 * mraid_mm_init - Module entry point
1194 // Announce the driver version
1195 con_log(CL_ANN, (KERN_INFO "megaraid cmm: %s %s\n",
1196 LSI_COMMON_MOD_VERSION, LSI_COMMON_MOD_EXT_VERSION));
1198 err = misc_register(&megaraid_mm_dev);
1200 con_log(CL_ANN, ("megaraid cmm: cannot register misc device\n"));
1204 init_waitqueue_head(&wait_q);
1206 INIT_LIST_HEAD(&adapters_list_g);
1212 #ifdef CONFIG_COMPAT
1214 * mraid_mm_compat_ioctl - 32bit to 64bit ioctl conversion routine
1215 * @filep : file operations pointer (ignored)
1216 * @cmd : ioctl command
1217 * @arg : user ioctl packet
1220 mraid_mm_compat_ioctl(struct file *filep, unsigned int cmd,
1225 err = mraid_mm_ioctl(NULL, filep, cmd, arg);
1232 * mraid_mm_exit - Module exit point
1237 con_log(CL_DLEVEL1 , ("exiting common mod\n"));
1239 misc_deregister(&megaraid_mm_dev);
1242 module_init(mraid_mm_init);
1243 module_exit(mraid_mm_exit);
1245 /* vi: set ts=8 sw=8 tw=78: */