1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Linux MegaRAID device driver
6 * Copyright (c) 2003-2004 LSI Logic Corporation.
9 * Version : v2.20.2.7 (Jul 16 2006)
11 * Common management module
13 #include <linux/sched.h>
14 #include <linux/slab.h>
15 #include <linux/mutex.h>
16 #include "megaraid_mm.h"
19 // Entry points for char node driver
20 static DEFINE_MUTEX(mraid_mm_mutex);
21 static int mraid_mm_open(struct inode *, struct file *);
22 static long mraid_mm_unlocked_ioctl(struct file *, uint, unsigned long);
25 // routines to convert to and from the old the format
26 static int mimd_to_kioc(mimd_t __user *, mraid_mmadp_t *, uioc_t *);
27 static int kioc_to_mimd(uioc_t *, mimd_t __user *);
31 static int handle_drvrcmd(void __user *, uint8_t, int *);
32 static int lld_ioctl(mraid_mmadp_t *, uioc_t *);
33 static void ioctl_done(uioc_t *);
34 static void lld_timedout(struct timer_list *);
35 static void hinfo_to_cinfo(mraid_hba_info_t *, mcontroller_t *);
36 static mraid_mmadp_t *mraid_mm_get_adapter(mimd_t __user *, int *);
37 static uioc_t *mraid_mm_alloc_kioc(mraid_mmadp_t *);
38 static void mraid_mm_dealloc_kioc(mraid_mmadp_t *, uioc_t *);
39 static int mraid_mm_attach_buf(mraid_mmadp_t *, uioc_t *, int);
40 static int mraid_mm_setup_dma_pools(mraid_mmadp_t *);
41 static void mraid_mm_free_adp_resources(mraid_mmadp_t *);
42 static void mraid_mm_teardown_dma_pools(mraid_mmadp_t *);
45 static long mraid_mm_compat_ioctl(struct file *, unsigned int, unsigned long);
48 MODULE_AUTHOR("LSI Logic Corporation");
49 MODULE_DESCRIPTION("LSI Logic Management Module");
50 MODULE_LICENSE("GPL");
51 MODULE_VERSION(LSI_COMMON_MOD_VERSION);
53 static int dbglevel = CL_ANN;
54 module_param_named(dlevel, dbglevel, int, 0);
55 MODULE_PARM_DESC(dlevel, "Debug level (default=0)");
57 EXPORT_SYMBOL(mraid_mm_register_adp);
58 EXPORT_SYMBOL(mraid_mm_unregister_adp);
59 EXPORT_SYMBOL(mraid_mm_adapter_app_handle);
61 static uint32_t drvr_ver = 0x02200207;
63 static int adapters_count_g;
64 static struct list_head adapters_list_g;
66 static wait_queue_head_t wait_q;
68 static const struct file_operations lsi_fops = {
69 .open = mraid_mm_open,
70 .unlocked_ioctl = mraid_mm_unlocked_ioctl,
72 .compat_ioctl = mraid_mm_compat_ioctl,
75 .llseek = noop_llseek,
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 file *filep, unsigned int cmd, unsigned long arg)
113 char signature[EXT_IOCTL_SIGN_SZ] = {0};
118 void __user *argp = (void __user *)arg;
121 * Make sure only USCSICMD are issued through this interface.
122 * MIMD application would still fire different command.
125 if ((_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD)) {
130 * Look for signature to see if this is the new or old ioctl format.
132 if (copy_from_user(signature, argp, EXT_IOCTL_SIGN_SZ)) {
133 con_log(CL_ANN, (KERN_WARNING
134 "megaraid cmm: copy from usr addr failed\n"));
138 if (memcmp(signature, EXT_IOCTL_SIGN, EXT_IOCTL_SIGN_SZ) == 0)
144 * At present, we don't support the new ioctl packet
150 * If it is a driver ioctl (as opposed to fw ioctls), then we can
151 * handle the command locally. rval > 0 means it is not a drvr cmd
153 rval = handle_drvrcmd(argp, old_ioctl, &drvrcmd_rval);
161 if ((adp = mraid_mm_get_adapter(argp, &rval)) == NULL) {
166 * Check if adapter can accept ioctl. We may have marked it offline
167 * if any previous kioc had timedout on this controller.
169 if (!adp->quiescent) {
170 con_log(CL_ANN, (KERN_WARNING
171 "megaraid cmm: controller cannot accept cmds due to "
172 "earlier errors\n" ));
177 * The following call will block till a kioc is available
178 * or return NULL if the list head is empty for the pointer
179 * of type mraid_mmapt passed to mraid_mm_alloc_kioc
181 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);
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))) {
203 mraid_mm_dealloc_kioc(adp, kioc);
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);
222 mraid_mm_unlocked_ioctl(struct file *filep, unsigned int cmd,
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);
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;
251 if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) {
256 adapno = GETADAP(mimd.ui.fcs.adapno);
258 if (adapno >= adapters_count_g) {
267 list_for_each_entry(adapter, &adapters_list_g, list) {
268 if (iterator++ == adapno) {
283 * handle_drvrcmd - Checks if the opcode is a driver cmd and if it is, handles it.
284 * @arg : packet sent by the user app
285 * @old_ioctl : mimd if 1; uioc otherwise
286 * @rval : pointer for command's returned value (not function status)
289 handle_drvrcmd(void __user *arg, uint8_t old_ioctl, int *rval)
291 mimd_t __user *umimd;
308 if (copy_from_user(&kmimd, umimd, sizeof(mimd_t)))
311 opcode = kmimd.ui.fcs.opcode;
312 subopcode = kmimd.ui.fcs.subopcode;
315 * If the opcode is 0x82 and the subopcode is either GET_DRVRVER or
316 * GET_NUMADP, then we can handle. Otherwise we should return 1 to
317 * indicate that we cannot handle this.
324 case MEGAIOC_QDRVRVER:
326 if (copy_to_user(kmimd.data, &drvr_ver, sizeof(uint32_t)))
333 *rval = adapters_count_g;
335 if (copy_to_user(kmimd.data, &adapters_count_g,
351 * mimd_to_kioc - Converter from old to new ioctl format
352 * @umimd : user space old MIMD IOCTL
353 * @adp : adapter softstate
354 * @kioc : kernel space new format IOCTL
356 * Routine to convert MIMD interface IOCTL to new interface IOCTL packet. The
357 * new packet is in kernel space so that driver can perform operations on it
362 mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc)
366 mraid_passthru_t *pthru32;
372 if (copy_from_user(&mimd, umimd, sizeof(mimd_t)))
376 * Applications are not allowed to send extd pthru
378 if ((mimd.mbox[0] == MBOXCMD_PASSTHRU64) ||
379 (mimd.mbox[0] == MBOXCMD_EXTPTHRU))
382 opcode = mimd.ui.fcs.opcode;
383 subopcode = mimd.ui.fcs.subopcode;
384 adapno = GETADAP(mimd.ui.fcs.adapno);
386 if (adapno >= adapters_count_g)
389 kioc->adapno = adapno;
390 kioc->mb_type = MBOX_LEGACY;
391 kioc->app_type = APPTYPE_MIMD;
397 if (subopcode == MEGAIOC_QADAPINFO) {
399 kioc->opcode = GET_ADAP_INFO;
400 kioc->data_dir = UIOC_RD;
401 kioc->xferlen = sizeof(mraid_hba_info_t);
403 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
407 con_log(CL_ANN, (KERN_WARNING
408 "megaraid cmm: Invalid subop\n"));
416 kioc->opcode = MBOX_CMD;
417 kioc->xferlen = mimd.ui.fcs.length;
418 kioc->user_data_len = kioc->xferlen;
419 kioc->user_data = mimd.ui.fcs.buffer;
421 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
424 if (mimd.outlen) kioc->data_dir = UIOC_RD;
425 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
431 kioc->opcode = MBOX_CMD;
432 kioc->xferlen = (mimd.outlen > mimd.inlen) ?
433 mimd.outlen : mimd.inlen;
434 kioc->user_data_len = kioc->xferlen;
435 kioc->user_data = mimd.data;
437 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
440 if (mimd.outlen) kioc->data_dir = UIOC_RD;
441 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
450 * If driver command, nothing else to do
456 * This is a mailbox cmd; copy the mailbox from mimd
458 mbox64 = (mbox64_t *)((unsigned long)kioc->cmdbuf);
459 mbox = &mbox64->mbox32;
460 memcpy(mbox, mimd.mbox, 14);
462 if (mbox->cmd != MBOXCMD_PASSTHRU) { // regular DCMD
464 mbox->xferaddr = (uint32_t)kioc->buf_paddr;
466 if (kioc->data_dir & UIOC_WR) {
467 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
477 * This is a regular 32-bit pthru cmd; mbox points to pthru struct.
478 * Just like in above case, the beginning for memblk is treated as
479 * a mailbox. The passthru will begin at next 1K boundary. And the
480 * data will start 1K after that.
482 pthru32 = kioc->pthru32;
483 kioc->user_pthru = &umimd->pthru;
484 mbox->xferaddr = (uint32_t)kioc->pthru32_h;
486 if (copy_from_user(pthru32, kioc->user_pthru,
487 sizeof(mraid_passthru_t))) {
491 pthru32->dataxferaddr = kioc->buf_paddr;
492 if (kioc->data_dir & UIOC_WR) {
493 if (pthru32->dataxferlen > kioc->xferlen)
495 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
496 pthru32->dataxferlen)) {
505 * mraid_mm_attch_buf - Attach a free dma buffer for required size
506 * @adp : Adapter softstate
507 * @kioc : kioc that the buffer needs to be attached to
508 * @xferlen : required length for buffer
510 * First we search for a pool with smallest buffer that is >= @xferlen. If
511 * that pool has no free buffer, we will try for the next bigger size. If none
512 * is available, we will try to allocate the smallest buffer that is >=
513 * @xferlen and attach it the pool.
516 mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen)
523 kioc->pool_index = -1;
524 kioc->buf_vaddr = NULL;
529 * We need xferlen amount of memory. See if we can get it from our
530 * dma pools. If we don't get exact size, we will try bigger buffer
533 for (i = 0; i < MAX_DMA_POOLS; i++) {
535 pool = &adp->dma_pool_list[i];
537 if (xferlen > pool->buf_size)
540 if (right_pool == -1)
543 spin_lock_irqsave(&pool->lock, flags);
548 kioc->pool_index = i;
549 kioc->buf_vaddr = pool->vaddr;
550 kioc->buf_paddr = pool->paddr;
552 spin_unlock_irqrestore(&pool->lock, flags);
556 spin_unlock_irqrestore(&pool->lock, flags);
562 * If xferlen doesn't match any of our pools, return error
564 if (right_pool == -1)
568 * We did not get any buffer from the preallocated pool. Let us try
569 * to allocate one new buffer. NOTE: This is a blocking call.
571 pool = &adp->dma_pool_list[right_pool];
573 spin_lock_irqsave(&pool->lock, flags);
575 kioc->pool_index = right_pool;
577 kioc->buf_vaddr = dma_pool_alloc(pool->handle, GFP_ATOMIC,
579 spin_unlock_irqrestore(&pool->lock, flags);
581 if (!kioc->buf_vaddr)
588 * mraid_mm_alloc_kioc - Returns a uioc_t from free list
589 * @adp : Adapter softstate for this module
591 * The kioc_semaphore is initialized with number of kioc nodes in the
592 * free kioc pool. If the kioc pool is empty, this function blocks till
593 * a kioc becomes free.
596 mraid_mm_alloc_kioc(mraid_mmadp_t *adp)
599 struct list_head* head;
602 down(&adp->kioc_semaphore);
604 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
606 head = &adp->kioc_pool;
608 if (list_empty(head)) {
609 up(&adp->kioc_semaphore);
610 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
612 con_log(CL_ANN, ("megaraid cmm: kioc list empty!\n"));
616 kioc = list_entry(head->next, uioc_t, list);
617 list_del_init(&kioc->list);
619 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
621 memset((caddr_t)(unsigned long)kioc->cmdbuf, 0, sizeof(mbox64_t));
622 memset((caddr_t) kioc->pthru32, 0, sizeof(mraid_passthru_t));
624 kioc->buf_vaddr = NULL;
626 kioc->pool_index =-1;
628 kioc->user_data = NULL;
629 kioc->user_data_len = 0;
630 kioc->user_pthru = NULL;
637 * mraid_mm_dealloc_kioc - Return kioc to free pool
638 * @adp : Adapter softstate
639 * @kioc : uioc_t node to be returned to free pool
642 mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc)
647 if (kioc->pool_index != -1) {
648 pool = &adp->dma_pool_list[kioc->pool_index];
650 /* This routine may be called in non-isr context also */
651 spin_lock_irqsave(&pool->lock, flags);
654 * While attaching the dma buffer, if we didn't get the
655 * required buffer from the pool, we would have allocated
656 * it at the run time and set the free_buf flag. We must
657 * free that buffer. Otherwise, just mark that the buffer is
660 if (kioc->free_buf == 1)
661 dma_pool_free(pool->handle, kioc->buf_vaddr,
666 spin_unlock_irqrestore(&pool->lock, flags);
669 /* Return the kioc to the free pool */
670 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
671 list_add(&kioc->list, &adp->kioc_pool);
672 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
674 /* increment the free kioc count */
675 up(&adp->kioc_semaphore);
681 * lld_ioctl - Routine to issue ioctl to low level drvr
682 * @adp : The adapter handle
683 * @kioc : The ioctl packet with kernel addresses
686 lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc)
689 struct uioc_timeout timeout = { };
691 kioc->status = -ENODATA;
692 rval = adp->issue_uioc(adp->drvr_data, kioc, IOCTL_ISSUE);
694 if (rval) return rval;
699 if (adp->timeout > 0) {
701 timer_setup_on_stack(&timeout.timer, lld_timedout, 0);
703 timeout.timer.expires = jiffies + adp->timeout * HZ;
705 add_timer(&timeout.timer);
709 * Wait till the low level driver completes the ioctl. After this
710 * call, the ioctl either completed successfully or timedout.
712 wait_event(wait_q, (kioc->status != -ENODATA));
713 if (timeout.timer.function) {
714 del_timer_sync(&timeout.timer);
715 destroy_timer_on_stack(&timeout.timer);
719 * If the command had timedout, we mark the controller offline
722 if (kioc->timedout) {
731 * ioctl_done - callback from the low level driver
732 * @kioc : completed ioctl packet
735 ioctl_done(uioc_t *kioc)
739 mraid_mmadp_t* adapter;
743 * When the kioc returns from driver, make sure it still doesn't
744 * have ENODATA in status. Otherwise, driver will hang on wait_event
747 if (kioc->status == -ENODATA) {
748 con_log(CL_ANN, (KERN_WARNING
749 "megaraid cmm: lld didn't change status!\n"));
751 kioc->status = -EINVAL;
755 * Check if this kioc was timedout before. If so, nobody is waiting
756 * on this kioc. We don't have to wake up anybody. Instead, we just
757 * have to free the kioc
759 if (kioc->timedout) {
762 adapno = kioc->adapno;
765 con_log(CL_ANN, ( KERN_WARNING "megaraid cmm: completed "
766 "ioctl that was timedout before\n"));
768 list_for_each_entry(adapter, &adapters_list_g, list) {
769 if (iterator++ == adapno) {
778 mraid_mm_dealloc_kioc( adapter, kioc );
788 * lld_timedout - callback from the expired timer
789 * @t : timer that timed out
792 lld_timedout(struct timer_list *t)
794 struct uioc_timeout *timeout = from_timer(timeout, t, timer);
795 uioc_t *kioc = timeout->uioc;
797 kioc->status = -ETIME;
800 con_log(CL_ANN, (KERN_WARNING "megaraid cmm: ioctl timed out\n"));
807 * kioc_to_mimd - Converter from new back to old format
808 * @kioc : Kernel space IOCTL packet (successfully issued)
809 * @mimd : User space MIMD packet
812 kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd)
819 mraid_passthru_t __user *upthru32;
820 mraid_passthru_t *kpthru32;
822 mraid_hba_info_t *hinfo;
825 if (copy_from_user(&kmimd, mimd, sizeof(mimd_t)))
828 opcode = kmimd.ui.fcs.opcode;
829 subopcode = kmimd.ui.fcs.subopcode;
831 if (opcode == 0x82) {
834 case MEGAIOC_QADAPINFO:
836 hinfo = (mraid_hba_info_t *)(unsigned long)
839 hinfo_to_cinfo(hinfo, &cinfo);
841 if (copy_to_user(kmimd.data, &cinfo, sizeof(cinfo)))
853 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
855 if (kioc->user_pthru) {
857 upthru32 = kioc->user_pthru;
858 kpthru32 = kioc->pthru32;
860 if (copy_to_user(&upthru32->scsistatus,
861 &kpthru32->scsistatus,
867 if (kioc->user_data) {
868 if (copy_to_user(kioc->user_data, kioc->buf_vaddr,
869 kioc->user_data_len)) {
874 if (copy_to_user(&mimd->mbox[17],
875 &mbox64->mbox32.status, sizeof(uint8_t))) {
884 * hinfo_to_cinfo - Convert new format hba info into old format
885 * @hinfo : New format, more comprehensive adapter info
886 * @cinfo : Old format adapter info to support mimd_t apps
889 hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo)
891 if (!hinfo || !cinfo)
894 cinfo->base = hinfo->baseport;
895 cinfo->irq = hinfo->irq;
896 cinfo->numldrv = hinfo->num_ldrv;
897 cinfo->pcibus = hinfo->pci_bus;
898 cinfo->pcidev = hinfo->pci_slot;
899 cinfo->pcifun = PCI_FUNC(hinfo->pci_dev_fn);
900 cinfo->pciid = hinfo->pci_device_id;
901 cinfo->pcivendor = hinfo->pci_vendor_id;
902 cinfo->pcislot = hinfo->pci_slot;
903 cinfo->uid = hinfo->unique_id;
908 * mraid_mm_register_adp - Registration routine for low level drivers
909 * @lld_adp : Adapter object
912 mraid_mm_register_adp(mraid_mmadp_t *lld_adp)
914 mraid_mmadp_t *adapter;
921 if (lld_adp->drvr_type != DRVRTYPE_MBOX)
924 adapter = kzalloc(sizeof(mraid_mmadp_t), GFP_KERNEL);
930 adapter->unique_id = lld_adp->unique_id;
931 adapter->drvr_type = lld_adp->drvr_type;
932 adapter->drvr_data = lld_adp->drvr_data;
933 adapter->pdev = lld_adp->pdev;
934 adapter->issue_uioc = lld_adp->issue_uioc;
935 adapter->timeout = lld_adp->timeout;
936 adapter->max_kioc = lld_adp->max_kioc;
937 adapter->quiescent = 1;
940 * Allocate single blocks of memory for all required kiocs,
941 * mailboxes and passthru structures.
943 adapter->kioc_list = kmalloc_array(lld_adp->max_kioc,
946 adapter->mbox_list = kmalloc_array(lld_adp->max_kioc,
949 adapter->pthru_dma_pool = dma_pool_create("megaraid mm pthru pool",
951 sizeof(mraid_passthru_t),
954 if (!adapter->kioc_list || !adapter->mbox_list ||
955 !adapter->pthru_dma_pool) {
957 con_log(CL_ANN, (KERN_WARNING
958 "megaraid cmm: out of memory, %s %d\n", __func__,
967 * Slice kioc_list and make a kioc_pool with the individiual kiocs
969 INIT_LIST_HEAD(&adapter->kioc_pool);
970 spin_lock_init(&adapter->kioc_pool_lock);
971 sema_init(&adapter->kioc_semaphore, lld_adp->max_kioc);
973 mbox_list = (mbox64_t *)adapter->mbox_list;
975 for (i = 0; i < lld_adp->max_kioc; i++) {
977 kioc = adapter->kioc_list + i;
978 kioc->cmdbuf = (uint64_t)(unsigned long)(mbox_list + i);
979 kioc->pthru32 = dma_pool_alloc(adapter->pthru_dma_pool,
980 GFP_KERNEL, &kioc->pthru32_h);
982 if (!kioc->pthru32) {
984 con_log(CL_ANN, (KERN_WARNING
985 "megaraid cmm: out of memory, %s %d\n",
986 __func__, __LINE__));
990 goto pthru_dma_pool_error;
993 list_add_tail(&kioc->list, &adapter->kioc_pool);
996 // Setup the dma pools for data buffers
997 if ((rval = mraid_mm_setup_dma_pools(adapter)) != 0) {
1001 list_add_tail(&adapter->list, &adapters_list_g);
1010 pthru_dma_pool_error:
1012 for (i = 0; i < lld_adp->max_kioc; i++) {
1013 kioc = adapter->kioc_list + i;
1014 if (kioc->pthru32) {
1015 dma_pool_free(adapter->pthru_dma_pool, kioc->pthru32,
1022 kfree(adapter->kioc_list);
1023 kfree(adapter->mbox_list);
1025 dma_pool_destroy(adapter->pthru_dma_pool);
1034 * mraid_mm_adapter_app_handle - return the application handle for this adapter
1035 * @unique_id : adapter unique identifier
1037 * For the given driver data, locate the adapter in our global list and
1038 * return the corresponding handle, which is also used by applications to
1039 * uniquely identify an adapter.
1041 * Return adapter handle if found in the list.
1042 * Return 0 if adapter could not be located, should never happen though.
1045 mraid_mm_adapter_app_handle(uint32_t unique_id)
1047 mraid_mmadp_t *adapter;
1051 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1053 if (adapter->unique_id == unique_id) {
1055 return MKADAP(index);
1066 * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter
1067 * @adp : Adapter softstate
1069 * We maintain a pool of dma buffers per each adapter. Each pool has one
1070 * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers.
1071 * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We
1072 * dont' want to waste too much memory by allocating more buffers per each
1076 mraid_mm_setup_dma_pools(mraid_mmadp_t *adp)
1083 * Create MAX_DMA_POOLS number of pools
1085 bufsize = MRAID_MM_INIT_BUFF_SIZE;
1087 for (i = 0; i < MAX_DMA_POOLS; i++){
1089 pool = &adp->dma_pool_list[i];
1091 pool->buf_size = bufsize;
1092 spin_lock_init(&pool->lock);
1094 pool->handle = dma_pool_create("megaraid mm data buffer",
1095 &adp->pdev->dev, bufsize,
1098 if (!pool->handle) {
1099 goto dma_pool_setup_error;
1102 pool->vaddr = dma_pool_alloc(pool->handle, GFP_KERNEL,
1106 goto dma_pool_setup_error;
1108 bufsize = bufsize * 2;
1113 dma_pool_setup_error:
1115 mraid_mm_teardown_dma_pools(adp);
1121 * mraid_mm_unregister_adp - Unregister routine for low level drivers
1122 * @unique_id : UID of the adpater
1124 * Assumes no outstanding ioctls to llds.
1127 mraid_mm_unregister_adp(uint32_t unique_id)
1129 mraid_mmadp_t *adapter;
1132 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1135 if (adapter->unique_id == unique_id) {
1139 list_del_init(&adapter->list);
1141 mraid_mm_free_adp_resources(adapter);
1146 "megaraid cmm: Unregistered one adapter:%#x\n",
1157 * mraid_mm_free_adp_resources - Free adapter softstate
1158 * @adp : Adapter softstate
1161 mraid_mm_free_adp_resources(mraid_mmadp_t *adp)
1166 mraid_mm_teardown_dma_pools(adp);
1168 for (i = 0; i < adp->max_kioc; i++) {
1170 kioc = adp->kioc_list + i;
1172 dma_pool_free(adp->pthru_dma_pool, kioc->pthru32,
1176 kfree(adp->kioc_list);
1177 kfree(adp->mbox_list);
1179 dma_pool_destroy(adp->pthru_dma_pool);
1187 * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers
1188 * @adp : Adapter softstate
1191 mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp)
1196 for (i = 0; i < MAX_DMA_POOLS; i++) {
1198 pool = &adp->dma_pool_list[i];
1203 dma_pool_free(pool->handle, pool->vaddr,
1206 dma_pool_destroy(pool->handle);
1207 pool->handle = NULL;
1215 * mraid_mm_init - Module entry point
1222 // Announce the driver version
1223 con_log(CL_ANN, (KERN_INFO "megaraid cmm: %s %s\n",
1224 LSI_COMMON_MOD_VERSION, LSI_COMMON_MOD_EXT_VERSION));
1226 err = misc_register(&megaraid_mm_dev);
1228 con_log(CL_ANN, ("megaraid cmm: cannot register misc device\n"));
1232 init_waitqueue_head(&wait_q);
1234 INIT_LIST_HEAD(&adapters_list_g);
1240 #ifdef CONFIG_COMPAT
1242 * mraid_mm_compat_ioctl - 32bit to 64bit ioctl conversion routine
1243 * @filep : file operations pointer (ignored)
1244 * @cmd : ioctl command
1245 * @arg : user ioctl packet
1248 mraid_mm_compat_ioctl(struct file *filep, unsigned int cmd,
1253 err = mraid_mm_ioctl(filep, cmd, arg);
1260 * mraid_mm_exit - Module exit point
1265 con_log(CL_DLEVEL1 , ("exiting common mod\n"));
1267 misc_deregister(&megaraid_mm_dev);
1270 module_init(mraid_mm_init);
1271 module_exit(mraid_mm_exit);
1273 /* vi: set ts=8 sw=8 tw=78: */