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 *);
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 *);
49 static long mraid_mm_compat_ioctl(struct file *, unsigned int, unsigned long);
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,
76 .compat_ioctl = mraid_mm_compat_ioctl,
79 .llseek = noop_llseek,
82 static struct miscdevice megaraid_mm_dev = {
83 .minor = MISC_DYNAMIC_MINOR,
89 * mraid_mm_open - open routine for char node interface
93 * Allow ioctl operations by apps only if they have superuser privilege.
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);
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
114 mraid_mm_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
117 char signature[EXT_IOCTL_SIGN_SZ] = {0};
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)) {
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"));
142 if (memcmp(signature, EXT_IOCTL_SIGN, EXT_IOCTL_SIGN_SZ) == 0)
148 * At present, we don't support the new ioctl packet
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);
165 if ((adp = mraid_mm_get_adapter(argp, &rval)) == NULL) {
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" ));
181 * The following call will block till a kioc is available
182 * or return NULL if the list head is empty for the pointer
183 * of type mraid_mmapt passed to mraid_mm_alloc_kioc
185 kioc = mraid_mm_alloc_kioc(adp);
190 * User sent the old mimd_t ioctl packet. Convert it to uioc_t.
192 if ((rval = mimd_to_kioc(argp, adp, kioc))) {
193 mraid_mm_dealloc_kioc(adp, kioc);
197 kioc->done = ioctl_done;
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.
204 if ((rval = lld_ioctl(adp, kioc))) {
207 mraid_mm_dealloc_kioc(adp, kioc);
213 * Convert the kioc back to user space
215 rval = kioc_to_mimd(kioc, argp);
218 * Return the kioc to free pool
220 mraid_mm_dealloc_kioc(adp, kioc);
226 mraid_mm_unlocked_ioctl(struct file *filep, unsigned int cmd,
231 /* inconsistent: mraid_mm_compat_ioctl doesn't take the BKL */
232 mutex_lock(&mraid_mm_mutex);
233 err = mraid_mm_ioctl(filep, cmd, arg);
234 mutex_unlock(&mraid_mm_mutex);
240 * mraid_mm_get_adapter - Returns corresponding adapters for the mimd packet
241 * @umimd : User space mimd_t ioctl packet
242 * @rval : returned success/error status
244 * The function return value is a pointer to the located @adapter.
246 static mraid_mmadp_t *
247 mraid_mm_get_adapter(mimd_t __user *umimd, int *rval)
249 mraid_mmadp_t *adapter;
255 if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) {
260 adapno = GETADAP(mimd.ui.fcs.adapno);
262 if (adapno >= adapters_count_g) {
271 list_for_each_entry(adapter, &adapters_list_g, list) {
272 if (iterator++ == adapno) {
287 * handle_drvrcmd - Checks if the opcode is a driver cmd and if it is, handles it.
288 * @arg : packet sent by the user app
289 * @old_ioctl : mimd if 1; uioc otherwise
290 * @rval : pointer for command's returned value (not function status)
293 handle_drvrcmd(void __user *arg, uint8_t old_ioctl, int *rval)
295 mimd_t __user *umimd;
312 if (copy_from_user(&kmimd, umimd, sizeof(mimd_t)))
315 opcode = kmimd.ui.fcs.opcode;
316 subopcode = kmimd.ui.fcs.subopcode;
319 * If the opcode is 0x82 and the subopcode is either GET_DRVRVER or
320 * GET_NUMADP, then we can handle. Otherwise we should return 1 to
321 * indicate that we cannot handle this.
328 case MEGAIOC_QDRVRVER:
330 if (copy_to_user(kmimd.data, &drvr_ver, sizeof(uint32_t)))
337 *rval = adapters_count_g;
339 if (copy_to_user(kmimd.data, &adapters_count_g,
355 * mimd_to_kioc - Converter from old to new ioctl format
356 * @umimd : user space old MIMD IOCTL
357 * @adp : adapter softstate
358 * @kioc : kernel space new format IOCTL
360 * Routine to convert MIMD interface IOCTL to new interface IOCTL packet. The
361 * new packet is in kernel space so that driver can perform operations on it
366 mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc)
370 mraid_passthru_t *pthru32;
376 if (copy_from_user(&mimd, umimd, sizeof(mimd_t)))
380 * Applications are not allowed to send extd pthru
382 if ((mimd.mbox[0] == MBOXCMD_PASSTHRU64) ||
383 (mimd.mbox[0] == MBOXCMD_EXTPTHRU))
386 opcode = mimd.ui.fcs.opcode;
387 subopcode = mimd.ui.fcs.subopcode;
388 adapno = GETADAP(mimd.ui.fcs.adapno);
390 if (adapno >= adapters_count_g)
393 kioc->adapno = adapno;
394 kioc->mb_type = MBOX_LEGACY;
395 kioc->app_type = APPTYPE_MIMD;
401 if (subopcode == MEGAIOC_QADAPINFO) {
403 kioc->opcode = GET_ADAP_INFO;
404 kioc->data_dir = UIOC_RD;
405 kioc->xferlen = sizeof(mraid_hba_info_t);
407 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
411 con_log(CL_ANN, (KERN_WARNING
412 "megaraid cmm: Invalid subop\n"));
420 kioc->opcode = MBOX_CMD;
421 kioc->xferlen = mimd.ui.fcs.length;
422 kioc->user_data_len = kioc->xferlen;
423 kioc->user_data = mimd.ui.fcs.buffer;
425 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
428 if (mimd.outlen) kioc->data_dir = UIOC_RD;
429 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
435 kioc->opcode = MBOX_CMD;
436 kioc->xferlen = (mimd.outlen > mimd.inlen) ?
437 mimd.outlen : mimd.inlen;
438 kioc->user_data_len = kioc->xferlen;
439 kioc->user_data = mimd.data;
441 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
444 if (mimd.outlen) kioc->data_dir = UIOC_RD;
445 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
454 * If driver command, nothing else to do
460 * This is a mailbox cmd; copy the mailbox from mimd
462 mbox64 = (mbox64_t *)((unsigned long)kioc->cmdbuf);
463 mbox = &mbox64->mbox32;
464 memcpy(mbox, mimd.mbox, 14);
466 if (mbox->cmd != MBOXCMD_PASSTHRU) { // regular DCMD
468 mbox->xferaddr = (uint32_t)kioc->buf_paddr;
470 if (kioc->data_dir & UIOC_WR) {
471 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
481 * This is a regular 32-bit pthru cmd; mbox points to pthru struct.
482 * Just like in above case, the beginning for memblk is treated as
483 * a mailbox. The passthru will begin at next 1K boundary. And the
484 * data will start 1K after that.
486 pthru32 = kioc->pthru32;
487 kioc->user_pthru = &umimd->pthru;
488 mbox->xferaddr = (uint32_t)kioc->pthru32_h;
490 if (copy_from_user(pthru32, kioc->user_pthru,
491 sizeof(mraid_passthru_t))) {
495 pthru32->dataxferaddr = kioc->buf_paddr;
496 if (kioc->data_dir & UIOC_WR) {
497 if (pthru32->dataxferlen > kioc->xferlen)
499 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
500 pthru32->dataxferlen)) {
509 * mraid_mm_attch_buf - Attach a free dma buffer for required size
510 * @adp : Adapter softstate
511 * @kioc : kioc that the buffer needs to be attached to
512 * @xferlen : required length for buffer
514 * First we search for a pool with smallest buffer that is >= @xferlen. If
515 * that pool has no free buffer, we will try for the next bigger size. If none
516 * is available, we will try to allocate the smallest buffer that is >=
517 * @xferlen and attach it the pool.
520 mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen)
527 kioc->pool_index = -1;
528 kioc->buf_vaddr = NULL;
533 * We need xferlen amount of memory. See if we can get it from our
534 * dma pools. If we don't get exact size, we will try bigger buffer
537 for (i = 0; i < MAX_DMA_POOLS; i++) {
539 pool = &adp->dma_pool_list[i];
541 if (xferlen > pool->buf_size)
544 if (right_pool == -1)
547 spin_lock_irqsave(&pool->lock, flags);
552 kioc->pool_index = i;
553 kioc->buf_vaddr = pool->vaddr;
554 kioc->buf_paddr = pool->paddr;
556 spin_unlock_irqrestore(&pool->lock, flags);
560 spin_unlock_irqrestore(&pool->lock, flags);
566 * If xferlen doesn't match any of our pools, return error
568 if (right_pool == -1)
572 * We did not get any buffer from the preallocated pool. Let us try
573 * to allocate one new buffer. NOTE: This is a blocking call.
575 pool = &adp->dma_pool_list[right_pool];
577 spin_lock_irqsave(&pool->lock, flags);
579 kioc->pool_index = right_pool;
581 kioc->buf_vaddr = dma_pool_alloc(pool->handle, GFP_ATOMIC,
583 spin_unlock_irqrestore(&pool->lock, flags);
585 if (!kioc->buf_vaddr)
592 * mraid_mm_alloc_kioc - Returns a uioc_t from free list
593 * @adp : Adapter softstate for this module
595 * The kioc_semaphore is initialized with number of kioc nodes in the
596 * free kioc pool. If the kioc pool is empty, this function blocks till
597 * a kioc becomes free.
600 mraid_mm_alloc_kioc(mraid_mmadp_t *adp)
603 struct list_head* head;
606 down(&adp->kioc_semaphore);
608 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
610 head = &adp->kioc_pool;
612 if (list_empty(head)) {
613 up(&adp->kioc_semaphore);
614 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
616 con_log(CL_ANN, ("megaraid cmm: kioc list empty!\n"));
620 kioc = list_entry(head->next, uioc_t, list);
621 list_del_init(&kioc->list);
623 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
625 memset((caddr_t)(unsigned long)kioc->cmdbuf, 0, sizeof(mbox64_t));
626 memset((caddr_t) kioc->pthru32, 0, sizeof(mraid_passthru_t));
628 kioc->buf_vaddr = NULL;
630 kioc->pool_index =-1;
632 kioc->user_data = NULL;
633 kioc->user_data_len = 0;
634 kioc->user_pthru = NULL;
641 * mraid_mm_dealloc_kioc - Return kioc to free pool
642 * @adp : Adapter softstate
643 * @kioc : uioc_t node to be returned to free pool
646 mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc)
651 if (kioc->pool_index != -1) {
652 pool = &adp->dma_pool_list[kioc->pool_index];
654 /* This routine may be called in non-isr context also */
655 spin_lock_irqsave(&pool->lock, flags);
658 * While attaching the dma buffer, if we didn't get the
659 * required buffer from the pool, we would have allocated
660 * it at the run time and set the free_buf flag. We must
661 * free that buffer. Otherwise, just mark that the buffer is
664 if (kioc->free_buf == 1)
665 dma_pool_free(pool->handle, kioc->buf_vaddr,
670 spin_unlock_irqrestore(&pool->lock, flags);
673 /* Return the kioc to the free pool */
674 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
675 list_add(&kioc->list, &adp->kioc_pool);
676 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
678 /* increment the free kioc count */
679 up(&adp->kioc_semaphore);
685 * lld_ioctl - Routine to issue ioctl to low level drvr
686 * @adp : The adapter handle
687 * @kioc : The ioctl packet with kernel addresses
690 lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc)
693 struct timer_list timer;
694 struct timer_list *tp = NULL;
696 kioc->status = -ENODATA;
697 rval = adp->issue_uioc(adp->drvr_data, kioc, IOCTL_ISSUE);
699 if (rval) return rval;
704 if (adp->timeout > 0) {
708 tp->function = lld_timedout;
709 tp->data = (unsigned long)kioc;
710 tp->expires = jiffies + adp->timeout * HZ;
716 * Wait till the low level driver completes the ioctl. After this
717 * call, the ioctl either completed successfully or timedout.
719 wait_event(wait_q, (kioc->status != -ENODATA));
725 * If the command had timedout, we mark the controller offline
728 if (kioc->timedout) {
737 * ioctl_done - callback from the low level driver
738 * @kioc : completed ioctl packet
741 ioctl_done(uioc_t *kioc)
745 mraid_mmadp_t* adapter;
749 * When the kioc returns from driver, make sure it still doesn't
750 * have ENODATA in status. Otherwise, driver will hang on wait_event
753 if (kioc->status == -ENODATA) {
754 con_log(CL_ANN, (KERN_WARNING
755 "megaraid cmm: lld didn't change status!\n"));
757 kioc->status = -EINVAL;
761 * Check if this kioc was timedout before. If so, nobody is waiting
762 * on this kioc. We don't have to wake up anybody. Instead, we just
763 * have to free the kioc
765 if (kioc->timedout) {
768 adapno = kioc->adapno;
771 con_log(CL_ANN, ( KERN_WARNING "megaraid cmm: completed "
772 "ioctl that was timedout before\n"));
774 list_for_each_entry(adapter, &adapters_list_g, list) {
775 if (iterator++ == adapno) {
784 mraid_mm_dealloc_kioc( adapter, kioc );
794 * lld_timedout - callback from the expired timer
795 * @ptr : ioctl packet that timed out
798 lld_timedout(unsigned long ptr)
800 uioc_t *kioc = (uioc_t *)ptr;
802 kioc->status = -ETIME;
805 con_log(CL_ANN, (KERN_WARNING "megaraid cmm: ioctl timed out\n"));
812 * kioc_to_mimd - Converter from new back to old format
813 * @kioc : Kernel space IOCTL packet (successfully issued)
814 * @mimd : User space MIMD packet
817 kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd)
824 mraid_passthru_t __user *upthru32;
825 mraid_passthru_t *kpthru32;
827 mraid_hba_info_t *hinfo;
830 if (copy_from_user(&kmimd, mimd, sizeof(mimd_t)))
833 opcode = kmimd.ui.fcs.opcode;
834 subopcode = kmimd.ui.fcs.subopcode;
836 if (opcode == 0x82) {
839 case MEGAIOC_QADAPINFO:
841 hinfo = (mraid_hba_info_t *)(unsigned long)
844 hinfo_to_cinfo(hinfo, &cinfo);
846 if (copy_to_user(kmimd.data, &cinfo, sizeof(cinfo)))
858 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
860 if (kioc->user_pthru) {
862 upthru32 = kioc->user_pthru;
863 kpthru32 = kioc->pthru32;
865 if (copy_to_user(&upthru32->scsistatus,
866 &kpthru32->scsistatus,
872 if (kioc->user_data) {
873 if (copy_to_user(kioc->user_data, kioc->buf_vaddr,
874 kioc->user_data_len)) {
879 if (copy_to_user(&mimd->mbox[17],
880 &mbox64->mbox32.status, sizeof(uint8_t))) {
889 * hinfo_to_cinfo - Convert new format hba info into old format
890 * @hinfo : New format, more comprehensive adapter info
891 * @cinfo : Old format adapter info to support mimd_t apps
894 hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo)
896 if (!hinfo || !cinfo)
899 cinfo->base = hinfo->baseport;
900 cinfo->irq = hinfo->irq;
901 cinfo->numldrv = hinfo->num_ldrv;
902 cinfo->pcibus = hinfo->pci_bus;
903 cinfo->pcidev = hinfo->pci_slot;
904 cinfo->pcifun = PCI_FUNC(hinfo->pci_dev_fn);
905 cinfo->pciid = hinfo->pci_device_id;
906 cinfo->pcivendor = hinfo->pci_vendor_id;
907 cinfo->pcislot = hinfo->pci_slot;
908 cinfo->uid = hinfo->unique_id;
913 * mraid_mm_register_adp - Registration routine for low level drivers
914 * @lld_adp : Adapter object
917 mraid_mm_register_adp(mraid_mmadp_t *lld_adp)
919 mraid_mmadp_t *adapter;
926 if (lld_adp->drvr_type != DRVRTYPE_MBOX)
929 adapter = kzalloc(sizeof(mraid_mmadp_t), GFP_KERNEL);
935 adapter->unique_id = lld_adp->unique_id;
936 adapter->drvr_type = lld_adp->drvr_type;
937 adapter->drvr_data = lld_adp->drvr_data;
938 adapter->pdev = lld_adp->pdev;
939 adapter->issue_uioc = lld_adp->issue_uioc;
940 adapter->timeout = lld_adp->timeout;
941 adapter->max_kioc = lld_adp->max_kioc;
942 adapter->quiescent = 1;
945 * Allocate single blocks of memory for all required kiocs,
946 * mailboxes and passthru structures.
948 adapter->kioc_list = kmalloc(sizeof(uioc_t) * lld_adp->max_kioc,
950 adapter->mbox_list = kmalloc(sizeof(mbox64_t) * lld_adp->max_kioc,
952 adapter->pthru_dma_pool = dma_pool_create("megaraid mm pthru pool",
954 sizeof(mraid_passthru_t),
957 if (!adapter->kioc_list || !adapter->mbox_list ||
958 !adapter->pthru_dma_pool) {
960 con_log(CL_ANN, (KERN_WARNING
961 "megaraid cmm: out of memory, %s %d\n", __func__,
970 * Slice kioc_list and make a kioc_pool with the individiual kiocs
972 INIT_LIST_HEAD(&adapter->kioc_pool);
973 spin_lock_init(&adapter->kioc_pool_lock);
974 sema_init(&adapter->kioc_semaphore, lld_adp->max_kioc);
976 mbox_list = (mbox64_t *)adapter->mbox_list;
978 for (i = 0; i < lld_adp->max_kioc; i++) {
980 kioc = adapter->kioc_list + i;
981 kioc->cmdbuf = (uint64_t)(unsigned long)(mbox_list + i);
982 kioc->pthru32 = dma_pool_alloc(adapter->pthru_dma_pool,
983 GFP_KERNEL, &kioc->pthru32_h);
985 if (!kioc->pthru32) {
987 con_log(CL_ANN, (KERN_WARNING
988 "megaraid cmm: out of memory, %s %d\n",
989 __func__, __LINE__));
993 goto pthru_dma_pool_error;
996 list_add_tail(&kioc->list, &adapter->kioc_pool);
999 // Setup the dma pools for data buffers
1000 if ((rval = mraid_mm_setup_dma_pools(adapter)) != 0) {
1001 goto dma_pool_error;
1004 list_add_tail(&adapter->list, &adapters_list_g);
1013 pthru_dma_pool_error:
1015 for (i = 0; i < lld_adp->max_kioc; i++) {
1016 kioc = adapter->kioc_list + i;
1017 if (kioc->pthru32) {
1018 dma_pool_free(adapter->pthru_dma_pool, kioc->pthru32,
1025 kfree(adapter->kioc_list);
1026 kfree(adapter->mbox_list);
1028 if (adapter->pthru_dma_pool)
1029 dma_pool_destroy(adapter->pthru_dma_pool);
1038 * mraid_mm_adapter_app_handle - return the application handle for this adapter
1039 * @unique_id : adapter unique identifier
1041 * For the given driver data, locate the adapter in our global list and
1042 * return the corresponding handle, which is also used by applications to
1043 * uniquely identify an adapter.
1045 * Return adapter handle if found in the list.
1046 * Return 0 if adapter could not be located, should never happen though.
1049 mraid_mm_adapter_app_handle(uint32_t unique_id)
1051 mraid_mmadp_t *adapter;
1055 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1057 if (adapter->unique_id == unique_id) {
1059 return MKADAP(index);
1070 * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter
1071 * @adp : Adapter softstate
1073 * We maintain a pool of dma buffers per each adapter. Each pool has one
1074 * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers.
1075 * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We
1076 * dont' want to waste too much memory by allocating more buffers per each
1080 mraid_mm_setup_dma_pools(mraid_mmadp_t *adp)
1087 * Create MAX_DMA_POOLS number of pools
1089 bufsize = MRAID_MM_INIT_BUFF_SIZE;
1091 for (i = 0; i < MAX_DMA_POOLS; i++){
1093 pool = &adp->dma_pool_list[i];
1095 pool->buf_size = bufsize;
1096 spin_lock_init(&pool->lock);
1098 pool->handle = dma_pool_create("megaraid mm data buffer",
1099 &adp->pdev->dev, bufsize,
1102 if (!pool->handle) {
1103 goto dma_pool_setup_error;
1106 pool->vaddr = dma_pool_alloc(pool->handle, GFP_KERNEL,
1110 goto dma_pool_setup_error;
1112 bufsize = bufsize * 2;
1117 dma_pool_setup_error:
1119 mraid_mm_teardown_dma_pools(adp);
1125 * mraid_mm_unregister_adp - Unregister routine for low level drivers
1126 * @unique_id : UID of the adpater
1128 * Assumes no outstanding ioctls to llds.
1131 mraid_mm_unregister_adp(uint32_t unique_id)
1133 mraid_mmadp_t *adapter;
1136 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1139 if (adapter->unique_id == unique_id) {
1143 list_del_init(&adapter->list);
1145 mraid_mm_free_adp_resources(adapter);
1150 "megaraid cmm: Unregistered one adapter:%#x\n",
1161 * mraid_mm_free_adp_resources - Free adapter softstate
1162 * @adp : Adapter softstate
1165 mraid_mm_free_adp_resources(mraid_mmadp_t *adp)
1170 mraid_mm_teardown_dma_pools(adp);
1172 for (i = 0; i < adp->max_kioc; i++) {
1174 kioc = adp->kioc_list + i;
1176 dma_pool_free(adp->pthru_dma_pool, kioc->pthru32,
1180 kfree(adp->kioc_list);
1181 kfree(adp->mbox_list);
1183 dma_pool_destroy(adp->pthru_dma_pool);
1191 * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers
1192 * @adp : Adapter softstate
1195 mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp)
1200 for (i = 0; i < MAX_DMA_POOLS; i++) {
1202 pool = &adp->dma_pool_list[i];
1207 dma_pool_free(pool->handle, pool->vaddr,
1210 dma_pool_destroy(pool->handle);
1211 pool->handle = NULL;
1219 * mraid_mm_init - Module entry point
1226 // Announce the driver version
1227 con_log(CL_ANN, (KERN_INFO "megaraid cmm: %s %s\n",
1228 LSI_COMMON_MOD_VERSION, LSI_COMMON_MOD_EXT_VERSION));
1230 err = misc_register(&megaraid_mm_dev);
1232 con_log(CL_ANN, ("megaraid cmm: cannot register misc device\n"));
1236 init_waitqueue_head(&wait_q);
1238 INIT_LIST_HEAD(&adapters_list_g);
1244 #ifdef CONFIG_COMPAT
1246 * mraid_mm_compat_ioctl - 32bit to 64bit ioctl conversion routine
1247 * @filep : file operations pointer (ignored)
1248 * @cmd : ioctl command
1249 * @arg : user ioctl packet
1252 mraid_mm_compat_ioctl(struct file *filep, unsigned int cmd,
1257 err = mraid_mm_ioctl(filep, cmd, arg);
1264 * mraid_mm_exit - Module exit point
1269 con_log(CL_DLEVEL1 , ("exiting common mod\n"));
1271 misc_deregister(&megaraid_mm_dev);
1274 module_init(mraid_mm_init);
1275 module_exit(mraid_mm_exit);
1277 /* vi: set ts=8 sw=8 tw=78: */