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(struct timer_list
*);
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
) {
270 list_for_each_entry(adapter
, &adapters_list_g
, list
) {
271 if (iterator
++ == adapno
) break;
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
;
742 * When the kioc returns from driver, make sure it still doesn't
743 * have ENODATA in status. Otherwise, driver will hang on wait_event
746 if (kioc
->status
== -ENODATA
) {
747 con_log(CL_ANN
, (KERN_WARNING
748 "megaraid cmm: lld didn't change status!\n"));
750 kioc
->status
= -EINVAL
;
754 * Check if this kioc was timedout before. If so, nobody is waiting
755 * on this kioc. We don't have to wake up anybody. Instead, we just
756 * have to free the kioc
758 if (kioc
->timedout
) {
761 adapno
= kioc
->adapno
;
763 con_log(CL_ANN
, ( KERN_WARNING
"megaraid cmm: completed "
764 "ioctl that was timedout before\n"));
766 list_for_each_entry(adapter
, &adapters_list_g
, list
) {
767 if (iterator
++ == adapno
) break;
773 mraid_mm_dealloc_kioc( adapter
, kioc
);
783 * lld_timedout - callback from the expired timer
784 * @t : timer that timed out
787 lld_timedout(struct timer_list
*t
)
789 struct uioc_timeout
*timeout
= from_timer(timeout
, t
, timer
);
790 uioc_t
*kioc
= timeout
->uioc
;
792 kioc
->status
= -ETIME
;
795 con_log(CL_ANN
, (KERN_WARNING
"megaraid cmm: ioctl timed out\n"));
802 * kioc_to_mimd - Converter from new back to old format
803 * @kioc : Kernel space IOCTL packet (successfully issued)
804 * @mimd : User space MIMD packet
807 kioc_to_mimd(uioc_t
*kioc
, mimd_t __user
*mimd
)
814 mraid_passthru_t __user
*upthru32
;
815 mraid_passthru_t
*kpthru32
;
817 mraid_hba_info_t
*hinfo
;
820 if (copy_from_user(&kmimd
, mimd
, sizeof(mimd_t
)))
823 opcode
= kmimd
.ui
.fcs
.opcode
;
824 subopcode
= kmimd
.ui
.fcs
.subopcode
;
826 if (opcode
== 0x82) {
829 case MEGAIOC_QADAPINFO
:
831 hinfo
= (mraid_hba_info_t
*)(unsigned long)
834 hinfo_to_cinfo(hinfo
, &cinfo
);
836 if (copy_to_user(kmimd
.data
, &cinfo
, sizeof(cinfo
)))
848 mbox64
= (mbox64_t
*)(unsigned long)kioc
->cmdbuf
;
850 if (kioc
->user_pthru
) {
852 upthru32
= kioc
->user_pthru
;
853 kpthru32
= kioc
->pthru32
;
855 if (copy_to_user(&upthru32
->scsistatus
,
856 &kpthru32
->scsistatus
,
862 if (kioc
->user_data
) {
863 if (copy_to_user(kioc
->user_data
, kioc
->buf_vaddr
,
864 kioc
->user_data_len
)) {
869 if (copy_to_user(&mimd
->mbox
[17],
870 &mbox64
->mbox32
.status
, sizeof(uint8_t))) {
879 * hinfo_to_cinfo - Convert new format hba info into old format
880 * @hinfo : New format, more comprehensive adapter info
881 * @cinfo : Old format adapter info to support mimd_t apps
884 hinfo_to_cinfo(mraid_hba_info_t
*hinfo
, mcontroller_t
*cinfo
)
886 if (!hinfo
|| !cinfo
)
889 cinfo
->base
= hinfo
->baseport
;
890 cinfo
->irq
= hinfo
->irq
;
891 cinfo
->numldrv
= hinfo
->num_ldrv
;
892 cinfo
->pcibus
= hinfo
->pci_bus
;
893 cinfo
->pcidev
= hinfo
->pci_slot
;
894 cinfo
->pcifun
= PCI_FUNC(hinfo
->pci_dev_fn
);
895 cinfo
->pciid
= hinfo
->pci_device_id
;
896 cinfo
->pcivendor
= hinfo
->pci_vendor_id
;
897 cinfo
->pcislot
= hinfo
->pci_slot
;
898 cinfo
->uid
= hinfo
->unique_id
;
903 * mraid_mm_register_adp - Registration routine for low level drivers
904 * @lld_adp : Adapter object
907 mraid_mm_register_adp(mraid_mmadp_t
*lld_adp
)
909 mraid_mmadp_t
*adapter
;
916 if (lld_adp
->drvr_type
!= DRVRTYPE_MBOX
)
919 adapter
= kzalloc(sizeof(mraid_mmadp_t
), GFP_KERNEL
);
925 adapter
->unique_id
= lld_adp
->unique_id
;
926 adapter
->drvr_type
= lld_adp
->drvr_type
;
927 adapter
->drvr_data
= lld_adp
->drvr_data
;
928 adapter
->pdev
= lld_adp
->pdev
;
929 adapter
->issue_uioc
= lld_adp
->issue_uioc
;
930 adapter
->timeout
= lld_adp
->timeout
;
931 adapter
->max_kioc
= lld_adp
->max_kioc
;
932 adapter
->quiescent
= 1;
935 * Allocate single blocks of memory for all required kiocs,
936 * mailboxes and passthru structures.
938 adapter
->kioc_list
= kmalloc_array(lld_adp
->max_kioc
,
941 adapter
->mbox_list
= kmalloc_array(lld_adp
->max_kioc
,
944 adapter
->pthru_dma_pool
= dma_pool_create("megaraid mm pthru pool",
946 sizeof(mraid_passthru_t
),
949 if (!adapter
->kioc_list
|| !adapter
->mbox_list
||
950 !adapter
->pthru_dma_pool
) {
952 con_log(CL_ANN
, (KERN_WARNING
953 "megaraid cmm: out of memory, %s %d\n", __func__
,
962 * Slice kioc_list and make a kioc_pool with the individiual kiocs
964 INIT_LIST_HEAD(&adapter
->kioc_pool
);
965 spin_lock_init(&adapter
->kioc_pool_lock
);
966 sema_init(&adapter
->kioc_semaphore
, lld_adp
->max_kioc
);
968 mbox_list
= (mbox64_t
*)adapter
->mbox_list
;
970 for (i
= 0; i
< lld_adp
->max_kioc
; i
++) {
972 kioc
= adapter
->kioc_list
+ i
;
973 kioc
->cmdbuf
= (uint64_t)(unsigned long)(mbox_list
+ i
);
974 kioc
->pthru32
= dma_pool_alloc(adapter
->pthru_dma_pool
,
975 GFP_KERNEL
, &kioc
->pthru32_h
);
977 if (!kioc
->pthru32
) {
979 con_log(CL_ANN
, (KERN_WARNING
980 "megaraid cmm: out of memory, %s %d\n",
981 __func__
, __LINE__
));
985 goto pthru_dma_pool_error
;
988 list_add_tail(&kioc
->list
, &adapter
->kioc_pool
);
991 // Setup the dma pools for data buffers
992 if ((rval
= mraid_mm_setup_dma_pools(adapter
)) != 0) {
996 list_add_tail(&adapter
->list
, &adapters_list_g
);
1005 pthru_dma_pool_error
:
1007 for (i
= 0; i
< lld_adp
->max_kioc
; i
++) {
1008 kioc
= adapter
->kioc_list
+ i
;
1009 if (kioc
->pthru32
) {
1010 dma_pool_free(adapter
->pthru_dma_pool
, kioc
->pthru32
,
1017 kfree(adapter
->kioc_list
);
1018 kfree(adapter
->mbox_list
);
1020 dma_pool_destroy(adapter
->pthru_dma_pool
);
1029 * mraid_mm_adapter_app_handle - return the application handle for this adapter
1030 * @unique_id : adapter unique identifier
1032 * For the given driver data, locate the adapter in our global list and
1033 * return the corresponding handle, which is also used by applications to
1034 * uniquely identify an adapter.
1036 * Return adapter handle if found in the list.
1037 * Return 0 if adapter could not be located, should never happen though.
1040 mraid_mm_adapter_app_handle(uint32_t unique_id
)
1042 mraid_mmadp_t
*adapter
;
1046 list_for_each_entry_safe(adapter
, tmp
, &adapters_list_g
, list
) {
1048 if (adapter
->unique_id
== unique_id
) {
1050 return MKADAP(index
);
1061 * mraid_mm_setup_dma_pools - Set up dma buffer pools per adapter
1062 * @adp : Adapter softstate
1064 * We maintain a pool of dma buffers per each adapter. Each pool has one
1065 * buffer. E.g, we may have 5 dma pools - one each for 4k, 8k ... 64k buffers.
1066 * We have just one 4k buffer in 4k pool, one 8k buffer in 8k pool etc. We
1067 * dont' want to waste too much memory by allocating more buffers per each
1071 mraid_mm_setup_dma_pools(mraid_mmadp_t
*adp
)
1078 * Create MAX_DMA_POOLS number of pools
1080 bufsize
= MRAID_MM_INIT_BUFF_SIZE
;
1082 for (i
= 0; i
< MAX_DMA_POOLS
; i
++){
1084 pool
= &adp
->dma_pool_list
[i
];
1086 pool
->buf_size
= bufsize
;
1087 spin_lock_init(&pool
->lock
);
1089 pool
->handle
= dma_pool_create("megaraid mm data buffer",
1090 &adp
->pdev
->dev
, bufsize
,
1093 if (!pool
->handle
) {
1094 goto dma_pool_setup_error
;
1097 pool
->vaddr
= dma_pool_alloc(pool
->handle
, GFP_KERNEL
,
1101 goto dma_pool_setup_error
;
1103 bufsize
= bufsize
* 2;
1108 dma_pool_setup_error
:
1110 mraid_mm_teardown_dma_pools(adp
);
1116 * mraid_mm_unregister_adp - Unregister routine for low level drivers
1117 * @unique_id : UID of the adpater
1119 * Assumes no outstanding ioctls to llds.
1122 mraid_mm_unregister_adp(uint32_t unique_id
)
1124 mraid_mmadp_t
*adapter
;
1127 list_for_each_entry_safe(adapter
, tmp
, &adapters_list_g
, list
) {
1130 if (adapter
->unique_id
== unique_id
) {
1134 list_del_init(&adapter
->list
);
1136 mraid_mm_free_adp_resources(adapter
);
1141 "megaraid cmm: Unregistered one adapter:%#x\n",
1152 * mraid_mm_free_adp_resources - Free adapter softstate
1153 * @adp : Adapter softstate
1156 mraid_mm_free_adp_resources(mraid_mmadp_t
*adp
)
1161 mraid_mm_teardown_dma_pools(adp
);
1163 for (i
= 0; i
< adp
->max_kioc
; i
++) {
1165 kioc
= adp
->kioc_list
+ i
;
1167 dma_pool_free(adp
->pthru_dma_pool
, kioc
->pthru32
,
1171 kfree(adp
->kioc_list
);
1172 kfree(adp
->mbox_list
);
1174 dma_pool_destroy(adp
->pthru_dma_pool
);
1182 * mraid_mm_teardown_dma_pools - Free all per adapter dma buffers
1183 * @adp : Adapter softstate
1186 mraid_mm_teardown_dma_pools(mraid_mmadp_t
*adp
)
1191 for (i
= 0; i
< MAX_DMA_POOLS
; i
++) {
1193 pool
= &adp
->dma_pool_list
[i
];
1198 dma_pool_free(pool
->handle
, pool
->vaddr
,
1201 dma_pool_destroy(pool
->handle
);
1202 pool
->handle
= NULL
;
1210 * mraid_mm_init - Module entry point
1217 // Announce the driver version
1218 con_log(CL_ANN
, (KERN_INFO
"megaraid cmm: %s %s\n",
1219 LSI_COMMON_MOD_VERSION
, LSI_COMMON_MOD_EXT_VERSION
));
1221 err
= misc_register(&megaraid_mm_dev
);
1223 con_log(CL_ANN
, ("megaraid cmm: cannot register misc device\n"));
1227 init_waitqueue_head(&wait_q
);
1229 INIT_LIST_HEAD(&adapters_list_g
);
1235 #ifdef CONFIG_COMPAT
1237 * mraid_mm_compat_ioctl - 32bit to 64bit ioctl conversion routine
1238 * @filep : file operations pointer (ignored)
1239 * @cmd : ioctl command
1240 * @arg : user ioctl packet
1243 mraid_mm_compat_ioctl(struct file
*filep
, unsigned int cmd
,
1248 err
= mraid_mm_ioctl(filep
, cmd
, arg
);
1255 * mraid_mm_exit - Module exit point
1260 con_log(CL_DLEVEL1
, ("exiting common mod\n"));
1262 misc_deregister(&megaraid_mm_dev
);
1265 module_init(mraid_mm_init
);
1266 module_exit(mraid_mm_exit
);
1268 /* vi: set ts=8 sw=8 tw=78: */