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 *);
44 MODULE_AUTHOR("LSI Logic Corporation");
45 MODULE_DESCRIPTION("LSI Logic Management Module");
46 MODULE_LICENSE("GPL");
47 MODULE_VERSION(LSI_COMMON_MOD_VERSION);
49 static int dbglevel = CL_ANN;
50 module_param_named(dlevel, dbglevel, int, 0);
51 MODULE_PARM_DESC(dlevel, "Debug level (default=0)");
53 EXPORT_SYMBOL(mraid_mm_register_adp);
54 EXPORT_SYMBOL(mraid_mm_unregister_adp);
55 EXPORT_SYMBOL(mraid_mm_adapter_app_handle);
57 static uint32_t drvr_ver = 0x02200207;
59 static int adapters_count_g;
60 static struct list_head adapters_list_g;
62 static wait_queue_head_t wait_q;
64 static const struct file_operations lsi_fops = {
65 .open = mraid_mm_open,
66 .unlocked_ioctl = mraid_mm_unlocked_ioctl,
67 .compat_ioctl = compat_ptr_ioctl,
69 .llseek = noop_llseek,
72 static struct miscdevice megaraid_mm_dev = {
73 .minor = MISC_DYNAMIC_MINOR,
79 * mraid_mm_open - open routine for char node interface
83 * Allow ioctl operations by apps only if they have superuser privilege.
86 mraid_mm_open(struct inode *inode, struct file *filep)
89 * Only allow superuser to access private ioctl interface
91 if (!capable(CAP_SYS_ADMIN)) return (-EACCES);
97 * mraid_mm_ioctl - module entry-point for ioctls
98 * @inode : inode (ignored)
99 * @filep : file operations pointer (ignored)
100 * @cmd : ioctl command
101 * @arg : user ioctl packet
104 mraid_mm_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
107 char signature[EXT_IOCTL_SIGN_SZ] = {0};
112 void __user *argp = (void __user *)arg;
115 * Make sure only USCSICMD are issued through this interface.
116 * MIMD application would still fire different command.
119 if ((_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD)) {
124 * Look for signature to see if this is the new or old ioctl format.
126 if (copy_from_user(signature, argp, EXT_IOCTL_SIGN_SZ)) {
127 con_log(CL_ANN, (KERN_WARNING
128 "megaraid cmm: copy from usr addr failed\n"));
132 if (memcmp(signature, EXT_IOCTL_SIGN, EXT_IOCTL_SIGN_SZ) == 0)
138 * At present, we don't support the new ioctl packet
144 * If it is a driver ioctl (as opposed to fw ioctls), then we can
145 * handle the command locally. rval > 0 means it is not a drvr cmd
147 rval = handle_drvrcmd(argp, old_ioctl, &drvrcmd_rval);
155 if ((adp = mraid_mm_get_adapter(argp, &rval)) == NULL) {
160 * Check if adapter can accept ioctl. We may have marked it offline
161 * if any previous kioc had timedout on this controller.
163 if (!adp->quiescent) {
164 con_log(CL_ANN, (KERN_WARNING
165 "megaraid cmm: controller cannot accept cmds due to "
166 "earlier errors\n" ));
171 * The following call will block till a kioc is available
172 * or return NULL if the list head is empty for the pointer
173 * of type mraid_mmapt passed to mraid_mm_alloc_kioc
175 kioc = mraid_mm_alloc_kioc(adp);
180 * User sent the old mimd_t ioctl packet. Convert it to uioc_t.
182 if ((rval = mimd_to_kioc(argp, adp, kioc))) {
183 mraid_mm_dealloc_kioc(adp, kioc);
187 kioc->done = ioctl_done;
190 * Issue the IOCTL to the low level driver. After the IOCTL completes
191 * release the kioc if and only if it was _not_ timedout. If it was
192 * timedout, that means that resources are still with low level driver.
194 if ((rval = lld_ioctl(adp, kioc))) {
197 mraid_mm_dealloc_kioc(adp, kioc);
203 * Convert the kioc back to user space
205 rval = kioc_to_mimd(kioc, argp);
208 * Return the kioc to free pool
210 mraid_mm_dealloc_kioc(adp, kioc);
216 mraid_mm_unlocked_ioctl(struct file *filep, unsigned int cmd,
221 mutex_lock(&mraid_mm_mutex);
222 err = mraid_mm_ioctl(filep, cmd, arg);
223 mutex_unlock(&mraid_mm_mutex);
229 * mraid_mm_get_adapter - Returns corresponding adapters for the mimd packet
230 * @umimd : User space mimd_t ioctl packet
231 * @rval : returned success/error status
233 * The function return value is a pointer to the located @adapter.
235 static mraid_mmadp_t *
236 mraid_mm_get_adapter(mimd_t __user *umimd, int *rval)
238 mraid_mmadp_t *adapter;
244 if (copy_from_user(&mimd, umimd, sizeof(mimd_t))) {
249 adapno = GETADAP(mimd.ui.fcs.adapno);
251 if (adapno >= adapters_count_g) {
259 list_for_each_entry(adapter, &adapters_list_g, list) {
260 if (iterator++ == adapno) break;
272 * handle_drvrcmd - Checks if the opcode is a driver cmd and if it is, handles it.
273 * @arg : packet sent by the user app
274 * @old_ioctl : mimd if 1; uioc otherwise
275 * @rval : pointer for command's returned value (not function status)
278 handle_drvrcmd(void __user *arg, uint8_t old_ioctl, int *rval)
280 mimd_t __user *umimd;
297 if (copy_from_user(&kmimd, umimd, sizeof(mimd_t)))
300 opcode = kmimd.ui.fcs.opcode;
301 subopcode = kmimd.ui.fcs.subopcode;
304 * If the opcode is 0x82 and the subopcode is either GET_DRVRVER or
305 * GET_NUMADP, then we can handle. Otherwise we should return 1 to
306 * indicate that we cannot handle this.
313 case MEGAIOC_QDRVRVER:
315 if (copy_to_user(kmimd.data, &drvr_ver, sizeof(uint32_t)))
322 *rval = adapters_count_g;
324 if (copy_to_user(kmimd.data, &adapters_count_g,
340 * mimd_to_kioc - Converter from old to new ioctl format
341 * @umimd : user space old MIMD IOCTL
342 * @adp : adapter softstate
343 * @kioc : kernel space new format IOCTL
345 * Routine to convert MIMD interface IOCTL to new interface IOCTL packet. The
346 * new packet is in kernel space so that driver can perform operations on it
351 mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc)
355 mraid_passthru_t *pthru32;
361 if (copy_from_user(&mimd, umimd, sizeof(mimd_t)))
365 * Applications are not allowed to send extd pthru
367 if ((mimd.mbox[0] == MBOXCMD_PASSTHRU64) ||
368 (mimd.mbox[0] == MBOXCMD_EXTPTHRU))
371 opcode = mimd.ui.fcs.opcode;
372 subopcode = mimd.ui.fcs.subopcode;
373 adapno = GETADAP(mimd.ui.fcs.adapno);
375 if (adapno >= adapters_count_g)
378 kioc->adapno = adapno;
379 kioc->mb_type = MBOX_LEGACY;
380 kioc->app_type = APPTYPE_MIMD;
386 if (subopcode == MEGAIOC_QADAPINFO) {
388 kioc->opcode = GET_ADAP_INFO;
389 kioc->data_dir = UIOC_RD;
390 kioc->xferlen = sizeof(mraid_hba_info_t);
392 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
396 con_log(CL_ANN, (KERN_WARNING
397 "megaraid cmm: Invalid subop\n"));
405 kioc->opcode = MBOX_CMD;
406 kioc->xferlen = mimd.ui.fcs.length;
407 kioc->user_data_len = kioc->xferlen;
408 kioc->user_data = mimd.ui.fcs.buffer;
410 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
413 if (mimd.outlen) kioc->data_dir = UIOC_RD;
414 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
420 kioc->opcode = MBOX_CMD;
421 kioc->xferlen = (mimd.outlen > mimd.inlen) ?
422 mimd.outlen : mimd.inlen;
423 kioc->user_data_len = kioc->xferlen;
424 kioc->user_data = mimd.data;
426 if (mraid_mm_attach_buf(adp, kioc, kioc->xferlen))
429 if (mimd.outlen) kioc->data_dir = UIOC_RD;
430 if (mimd.inlen) kioc->data_dir |= UIOC_WR;
439 * If driver command, nothing else to do
445 * This is a mailbox cmd; copy the mailbox from mimd
447 mbox64 = (mbox64_t *)((unsigned long)kioc->cmdbuf);
448 mbox = &mbox64->mbox32;
449 memcpy(mbox, mimd.mbox, 14);
451 if (mbox->cmd != MBOXCMD_PASSTHRU) { // regular DCMD
453 mbox->xferaddr = (uint32_t)kioc->buf_paddr;
455 if (kioc->data_dir & UIOC_WR) {
456 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
466 * This is a regular 32-bit pthru cmd; mbox points to pthru struct.
467 * Just like in above case, the beginning for memblk is treated as
468 * a mailbox. The passthru will begin at next 1K boundary. And the
469 * data will start 1K after that.
471 pthru32 = kioc->pthru32;
472 kioc->user_pthru = &umimd->pthru;
473 mbox->xferaddr = (uint32_t)kioc->pthru32_h;
475 if (copy_from_user(pthru32, kioc->user_pthru,
476 sizeof(mraid_passthru_t))) {
480 pthru32->dataxferaddr = kioc->buf_paddr;
481 if (kioc->data_dir & UIOC_WR) {
482 if (pthru32->dataxferlen > kioc->xferlen)
484 if (copy_from_user(kioc->buf_vaddr, kioc->user_data,
485 pthru32->dataxferlen)) {
494 * mraid_mm_attch_buf - Attach a free dma buffer for required size
495 * @adp : Adapter softstate
496 * @kioc : kioc that the buffer needs to be attached to
497 * @xferlen : required length for buffer
499 * First we search for a pool with smallest buffer that is >= @xferlen. If
500 * that pool has no free buffer, we will try for the next bigger size. If none
501 * is available, we will try to allocate the smallest buffer that is >=
502 * @xferlen and attach it the pool.
505 mraid_mm_attach_buf(mraid_mmadp_t *adp, uioc_t *kioc, int xferlen)
512 kioc->pool_index = -1;
513 kioc->buf_vaddr = NULL;
518 * We need xferlen amount of memory. See if we can get it from our
519 * dma pools. If we don't get exact size, we will try bigger buffer
522 for (i = 0; i < MAX_DMA_POOLS; i++) {
524 pool = &adp->dma_pool_list[i];
526 if (xferlen > pool->buf_size)
529 if (right_pool == -1)
532 spin_lock_irqsave(&pool->lock, flags);
537 kioc->pool_index = i;
538 kioc->buf_vaddr = pool->vaddr;
539 kioc->buf_paddr = pool->paddr;
541 spin_unlock_irqrestore(&pool->lock, flags);
545 spin_unlock_irqrestore(&pool->lock, flags);
551 * If xferlen doesn't match any of our pools, return error
553 if (right_pool == -1)
557 * We did not get any buffer from the preallocated pool. Let us try
558 * to allocate one new buffer. NOTE: This is a blocking call.
560 pool = &adp->dma_pool_list[right_pool];
562 spin_lock_irqsave(&pool->lock, flags);
564 kioc->pool_index = right_pool;
566 kioc->buf_vaddr = dma_pool_alloc(pool->handle, GFP_ATOMIC,
568 spin_unlock_irqrestore(&pool->lock, flags);
570 if (!kioc->buf_vaddr)
577 * mraid_mm_alloc_kioc - Returns a uioc_t from free list
578 * @adp : Adapter softstate for this module
580 * The kioc_semaphore is initialized with number of kioc nodes in the
581 * free kioc pool. If the kioc pool is empty, this function blocks till
582 * a kioc becomes free.
585 mraid_mm_alloc_kioc(mraid_mmadp_t *adp)
588 struct list_head* head;
591 down(&adp->kioc_semaphore);
593 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
595 head = &adp->kioc_pool;
597 if (list_empty(head)) {
598 up(&adp->kioc_semaphore);
599 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
601 con_log(CL_ANN, ("megaraid cmm: kioc list empty!\n"));
605 kioc = list_entry(head->next, uioc_t, list);
606 list_del_init(&kioc->list);
608 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
610 memset((caddr_t)(unsigned long)kioc->cmdbuf, 0, sizeof(mbox64_t));
611 memset((caddr_t) kioc->pthru32, 0, sizeof(mraid_passthru_t));
613 kioc->buf_vaddr = NULL;
615 kioc->pool_index =-1;
617 kioc->user_data = NULL;
618 kioc->user_data_len = 0;
619 kioc->user_pthru = NULL;
626 * mraid_mm_dealloc_kioc - Return kioc to free pool
627 * @adp : Adapter softstate
628 * @kioc : uioc_t node to be returned to free pool
631 mraid_mm_dealloc_kioc(mraid_mmadp_t *adp, uioc_t *kioc)
636 if (kioc->pool_index != -1) {
637 pool = &adp->dma_pool_list[kioc->pool_index];
639 /* This routine may be called in non-isr context also */
640 spin_lock_irqsave(&pool->lock, flags);
643 * While attaching the dma buffer, if we didn't get the
644 * required buffer from the pool, we would have allocated
645 * it at the run time and set the free_buf flag. We must
646 * free that buffer. Otherwise, just mark that the buffer is
649 if (kioc->free_buf == 1)
650 dma_pool_free(pool->handle, kioc->buf_vaddr,
655 spin_unlock_irqrestore(&pool->lock, flags);
658 /* Return the kioc to the free pool */
659 spin_lock_irqsave(&adp->kioc_pool_lock, flags);
660 list_add(&kioc->list, &adp->kioc_pool);
661 spin_unlock_irqrestore(&adp->kioc_pool_lock, flags);
663 /* increment the free kioc count */
664 up(&adp->kioc_semaphore);
670 * lld_ioctl - Routine to issue ioctl to low level drvr
671 * @adp : The adapter handle
672 * @kioc : The ioctl packet with kernel addresses
675 lld_ioctl(mraid_mmadp_t *adp, uioc_t *kioc)
678 struct uioc_timeout timeout = { };
680 kioc->status = -ENODATA;
681 rval = adp->issue_uioc(adp->drvr_data, kioc, IOCTL_ISSUE);
683 if (rval) return rval;
688 if (adp->timeout > 0) {
690 timer_setup_on_stack(&timeout.timer, lld_timedout, 0);
692 timeout.timer.expires = jiffies + adp->timeout * HZ;
694 add_timer(&timeout.timer);
698 * Wait till the low level driver completes the ioctl. After this
699 * call, the ioctl either completed successfully or timedout.
701 wait_event(wait_q, (kioc->status != -ENODATA));
702 if (timeout.timer.function) {
703 del_timer_sync(&timeout.timer);
704 destroy_timer_on_stack(&timeout.timer);
708 * If the command had timedout, we mark the controller offline
711 if (kioc->timedout) {
720 * ioctl_done - callback from the low level driver
721 * @kioc : completed ioctl packet
724 ioctl_done(uioc_t *kioc)
728 mraid_mmadp_t* adapter;
731 * When the kioc returns from driver, make sure it still doesn't
732 * have ENODATA in status. Otherwise, driver will hang on wait_event
735 if (kioc->status == -ENODATA) {
736 con_log(CL_ANN, (KERN_WARNING
737 "megaraid cmm: lld didn't change status!\n"));
739 kioc->status = -EINVAL;
743 * Check if this kioc was timedout before. If so, nobody is waiting
744 * on this kioc. We don't have to wake up anybody. Instead, we just
745 * have to free the kioc
747 if (kioc->timedout) {
750 adapno = kioc->adapno;
752 con_log(CL_ANN, ( KERN_WARNING "megaraid cmm: completed "
753 "ioctl that was timedout before\n"));
755 list_for_each_entry(adapter, &adapters_list_g, list) {
756 if (iterator++ == adapno) break;
762 mraid_mm_dealloc_kioc( adapter, kioc );
772 * lld_timedout - callback from the expired timer
773 * @t : timer that timed out
776 lld_timedout(struct timer_list *t)
778 struct uioc_timeout *timeout = from_timer(timeout, t, timer);
779 uioc_t *kioc = timeout->uioc;
781 kioc->status = -ETIME;
784 con_log(CL_ANN, (KERN_WARNING "megaraid cmm: ioctl timed out\n"));
791 * kioc_to_mimd - Converter from new back to old format
792 * @kioc : Kernel space IOCTL packet (successfully issued)
793 * @mimd : User space MIMD packet
796 kioc_to_mimd(uioc_t *kioc, mimd_t __user *mimd)
803 mraid_passthru_t __user *upthru32;
804 mraid_passthru_t *kpthru32;
806 mraid_hba_info_t *hinfo;
809 if (copy_from_user(&kmimd, mimd, sizeof(mimd_t)))
812 opcode = kmimd.ui.fcs.opcode;
813 subopcode = kmimd.ui.fcs.subopcode;
815 if (opcode == 0x82) {
818 case MEGAIOC_QADAPINFO:
820 hinfo = (mraid_hba_info_t *)(unsigned long)
823 hinfo_to_cinfo(hinfo, &cinfo);
825 if (copy_to_user(kmimd.data, &cinfo, sizeof(cinfo)))
837 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
839 if (kioc->user_pthru) {
841 upthru32 = kioc->user_pthru;
842 kpthru32 = kioc->pthru32;
844 if (copy_to_user(&upthru32->scsistatus,
845 &kpthru32->scsistatus,
851 if (kioc->user_data) {
852 if (copy_to_user(kioc->user_data, kioc->buf_vaddr,
853 kioc->user_data_len)) {
858 if (copy_to_user(&mimd->mbox[17],
859 &mbox64->mbox32.status, sizeof(uint8_t))) {
868 * hinfo_to_cinfo - Convert new format hba info into old format
869 * @hinfo : New format, more comprehensive adapter info
870 * @cinfo : Old format adapter info to support mimd_t apps
873 hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo)
875 if (!hinfo || !cinfo)
878 cinfo->base = hinfo->baseport;
879 cinfo->irq = hinfo->irq;
880 cinfo->numldrv = hinfo->num_ldrv;
881 cinfo->pcibus = hinfo->pci_bus;
882 cinfo->pcidev = hinfo->pci_slot;
883 cinfo->pcifun = PCI_FUNC(hinfo->pci_dev_fn);
884 cinfo->pciid = hinfo->pci_device_id;
885 cinfo->pcivendor = hinfo->pci_vendor_id;
886 cinfo->pcislot = hinfo->pci_slot;
887 cinfo->uid = hinfo->unique_id;
892 * mraid_mm_register_adp - Registration routine for low level drivers
893 * @lld_adp : Adapter object
896 mraid_mm_register_adp(mraid_mmadp_t *lld_adp)
898 mraid_mmadp_t *adapter;
905 if (lld_adp->drvr_type != DRVRTYPE_MBOX)
908 adapter = kzalloc(sizeof(mraid_mmadp_t), GFP_KERNEL);
914 adapter->unique_id = lld_adp->unique_id;
915 adapter->drvr_type = lld_adp->drvr_type;
916 adapter->drvr_data = lld_adp->drvr_data;
917 adapter->pdev = lld_adp->pdev;
918 adapter->issue_uioc = lld_adp->issue_uioc;
919 adapter->timeout = lld_adp->timeout;
920 adapter->max_kioc = lld_adp->max_kioc;
921 adapter->quiescent = 1;
924 * Allocate single blocks of memory for all required kiocs,
925 * mailboxes and passthru structures.
927 adapter->kioc_list = kmalloc_array(lld_adp->max_kioc,
930 adapter->mbox_list = kmalloc_array(lld_adp->max_kioc,
933 adapter->pthru_dma_pool = dma_pool_create("megaraid mm pthru pool",
935 sizeof(mraid_passthru_t),
938 if (!adapter->kioc_list || !adapter->mbox_list ||
939 !adapter->pthru_dma_pool) {
941 con_log(CL_ANN, (KERN_WARNING
942 "megaraid cmm: out of memory, %s %d\n", __func__,
951 * Slice kioc_list and make a kioc_pool with the individiual kiocs
953 INIT_LIST_HEAD(&adapter->kioc_pool);
954 spin_lock_init(&adapter->kioc_pool_lock);
955 sema_init(&adapter->kioc_semaphore, lld_adp->max_kioc);
957 mbox_list = (mbox64_t *)adapter->mbox_list;
959 for (i = 0; i < lld_adp->max_kioc; i++) {
961 kioc = adapter->kioc_list + i;
962 kioc->cmdbuf = (uint64_t)(unsigned long)(mbox_list + i);
963 kioc->pthru32 = dma_pool_alloc(adapter->pthru_dma_pool,
964 GFP_KERNEL, &kioc->pthru32_h);
966 if (!kioc->pthru32) {
968 con_log(CL_ANN, (KERN_WARNING
969 "megaraid cmm: out of memory, %s %d\n",
970 __func__, __LINE__));
974 goto pthru_dma_pool_error;
977 list_add_tail(&kioc->list, &adapter->kioc_pool);
980 // Setup the dma pools for data buffers
981 if ((rval = mraid_mm_setup_dma_pools(adapter)) != 0) {
985 list_add_tail(&adapter->list, &adapters_list_g);
994 pthru_dma_pool_error:
996 for (i = 0; i < lld_adp->max_kioc; i++) {
997 kioc = adapter->kioc_list + i;
999 dma_pool_free(adapter->pthru_dma_pool, kioc->pthru32,
1006 kfree(adapter->kioc_list);
1007 kfree(adapter->mbox_list);
1009 dma_pool_destroy(adapter->pthru_dma_pool);
1018 * mraid_mm_adapter_app_handle - return the application handle for this adapter
1019 * @unique_id : adapter unique identifier
1021 * For the given driver data, locate the adapter in our global list and
1022 * return the corresponding handle, which is also used by applications to
1023 * uniquely identify an adapter.
1025 * Return adapter handle if found in the list.
1026 * Return 0 if adapter could not be located, should never happen though.
1029 mraid_mm_adapter_app_handle(uint32_t unique_id)
1031 mraid_mmadp_t *adapter;
1035 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1037 if (adapter->unique_id == unique_id) {
1039 return MKADAP(index);
1050 * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter
1051 * @adp : Adapter softstate
1053 * We maintain a pool of dma buffers per each adapter. Each pool has one
1054 * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers.
1055 * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We
1056 * dont' want to waste too much memory by allocating more buffers per each
1060 mraid_mm_setup_dma_pools(mraid_mmadp_t *adp)
1067 * Create MAX_DMA_POOLS number of pools
1069 bufsize = MRAID_MM_INIT_BUFF_SIZE;
1071 for (i = 0; i < MAX_DMA_POOLS; i++){
1073 pool = &adp->dma_pool_list[i];
1075 pool->buf_size = bufsize;
1076 spin_lock_init(&pool->lock);
1078 pool->handle = dma_pool_create("megaraid mm data buffer",
1079 &adp->pdev->dev, bufsize,
1082 if (!pool->handle) {
1083 goto dma_pool_setup_error;
1086 pool->vaddr = dma_pool_alloc(pool->handle, GFP_KERNEL,
1090 goto dma_pool_setup_error;
1092 bufsize = bufsize * 2;
1097 dma_pool_setup_error:
1099 mraid_mm_teardown_dma_pools(adp);
1105 * mraid_mm_unregister_adp - Unregister routine for low level drivers
1106 * @unique_id : UID of the adpater
1108 * Assumes no outstanding ioctls to llds.
1111 mraid_mm_unregister_adp(uint32_t unique_id)
1113 mraid_mmadp_t *adapter;
1116 list_for_each_entry_safe(adapter, tmp, &adapters_list_g, list) {
1119 if (adapter->unique_id == unique_id) {
1123 list_del_init(&adapter->list);
1125 mraid_mm_free_adp_resources(adapter);
1130 "megaraid cmm: Unregistered one adapter:%#x\n",
1141 * mraid_mm_free_adp_resources - Free adapter softstate
1142 * @adp : Adapter softstate
1145 mraid_mm_free_adp_resources(mraid_mmadp_t *adp)
1150 mraid_mm_teardown_dma_pools(adp);
1152 for (i = 0; i < adp->max_kioc; i++) {
1154 kioc = adp->kioc_list + i;
1156 dma_pool_free(adp->pthru_dma_pool, kioc->pthru32,
1160 kfree(adp->kioc_list);
1161 kfree(adp->mbox_list);
1163 dma_pool_destroy(adp->pthru_dma_pool);
1171 * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers
1172 * @adp : Adapter softstate
1175 mraid_mm_teardown_dma_pools(mraid_mmadp_t *adp)
1180 for (i = 0; i < MAX_DMA_POOLS; i++) {
1182 pool = &adp->dma_pool_list[i];
1187 dma_pool_free(pool->handle, pool->vaddr,
1190 dma_pool_destroy(pool->handle);
1191 pool->handle = NULL;
1199 * mraid_mm_init - Module entry point
1206 // Announce the driver version
1207 con_log(CL_ANN, (KERN_INFO "megaraid cmm: %s %s\n",
1208 LSI_COMMON_MOD_VERSION, LSI_COMMON_MOD_EXT_VERSION));
1210 err = misc_register(&megaraid_mm_dev);
1212 con_log(CL_ANN, ("megaraid cmm: cannot register misc device\n"));
1216 init_waitqueue_head(&wait_q);
1218 INIT_LIST_HEAD(&adapters_list_g);
1225 * mraid_mm_exit - Module exit point
1230 con_log(CL_DLEVEL1 , ("exiting common mod\n"));
1232 misc_deregister(&megaraid_mm_dev);
1235 module_init(mraid_mm_init);
1236 module_exit(mraid_mm_exit);
1238 /* vi: set ts=8 sw=8 tw=78: */