3 * Generic buffer template
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
10 * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
12 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
13 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
14 * All Rights Reserved.
16 * Permission is hereby granted, free of charge, to any person obtaining a
17 * copy of this software and associated documentation files (the "Software"),
18 * to deal in the Software without restriction, including without limitation
19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20 * and/or sell copies of the Software, and to permit persons to whom the
21 * Software is furnished to do so, subject to the following conditions:
23 * The above copyright notice and this permission notice (including the next
24 * paragraph) shall be included in all copies or substantial portions of the
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
33 * OTHER DEALINGS IN THE SOFTWARE.
36 #include <linux/vmalloc.h>
39 unsigned long drm_get_resource_start(struct drm_device
*dev
, unsigned int resource
)
41 return pci_resource_start(dev
->pdev
, resource
);
43 EXPORT_SYMBOL(drm_get_resource_start
);
45 unsigned long drm_get_resource_len(struct drm_device
*dev
, unsigned int resource
)
47 return pci_resource_len(dev
->pdev
, resource
);
50 EXPORT_SYMBOL(drm_get_resource_len
);
52 static struct drm_map_list
*drm_find_matching_map(struct drm_device
*dev
,
55 struct drm_map_list
*entry
;
56 list_for_each_entry(entry
, &dev
->maplist
, head
) {
57 if (entry
->map
&& (entry
->master
== dev
->primary
->master
) && (map
->type
== entry
->map
->type
) &&
58 ((entry
->map
->offset
== map
->offset
) ||
59 ((map
->type
== _DRM_SHM
) && (map
->flags
&_DRM_CONTAINS_LOCK
)))) {
67 static int drm_map_handle(struct drm_device
*dev
, struct drm_hash_item
*hash
,
68 unsigned long user_token
, int hashed_handle
)
70 int use_hashed_handle
;
71 #if (BITS_PER_LONG == 64)
72 use_hashed_handle
= ((user_token
& 0xFFFFFFFF00000000UL
) || hashed_handle
);
73 #elif (BITS_PER_LONG == 32)
74 use_hashed_handle
= hashed_handle
;
76 #error Unsupported long size. Neither 64 nor 32 bits.
79 if (!use_hashed_handle
) {
81 hash
->key
= user_token
>> PAGE_SHIFT
;
82 ret
= drm_ht_insert_item(&dev
->map_hash
, hash
);
86 return drm_ht_just_insert_please(&dev
->map_hash
, hash
,
87 user_token
, 32 - PAGE_SHIFT
- 3,
88 0, DRM_MAP_HASH_OFFSET
>> PAGE_SHIFT
);
92 * Ioctl to specify a range of memory that is available for mapping by a non-root process.
94 * \param inode device inode.
95 * \param file_priv DRM file private.
97 * \param arg pointer to a drm_map structure.
98 * \return zero on success or a negative value on error.
100 * Adjusts the memory offset to its absolute value according to the mapping
101 * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where
102 * applicable and if supported by the kernel.
104 static int drm_addmap_core(struct drm_device
* dev
, unsigned int offset
,
105 unsigned int size
, enum drm_map_type type
,
106 enum drm_map_flags flags
,
107 struct drm_map_list
** maplist
)
110 struct drm_map_list
*list
;
111 drm_dma_handle_t
*dmah
;
112 unsigned long user_token
;
115 map
= drm_alloc(sizeof(*map
), DRM_MEM_MAPS
);
119 map
->offset
= offset
;
124 /* Only allow shared memory to be removable since we only keep enough
125 * book keeping information about shared memory to allow for removal
126 * when processes fork.
128 if ((map
->flags
& _DRM_REMOVABLE
) && map
->type
!= _DRM_SHM
) {
129 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
132 DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n",
133 map
->offset
, map
->size
, map
->type
);
134 if ((map
->offset
& (~PAGE_MASK
)) || (map
->size
& (~PAGE_MASK
))) {
135 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
143 case _DRM_FRAME_BUFFER
:
144 #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__)
145 if (map
->offset
+ (map
->size
-1) < map
->offset
||
146 map
->offset
< virt_to_phys(high_memory
)) {
147 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
152 map
->offset
+= dev
->hose
->mem_space
->start
;
154 /* Some drivers preinitialize some maps, without the X Server
155 * needing to be aware of it. Therefore, we just return success
156 * when the server tries to create a duplicate map.
158 list
= drm_find_matching_map(dev
, map
);
160 if (list
->map
->size
!= map
->size
) {
161 DRM_DEBUG("Matching maps of type %d with "
162 "mismatched sizes, (%ld vs %ld)\n",
163 map
->type
, map
->size
,
165 list
->map
->size
= map
->size
;
168 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
173 if (drm_core_has_MTRR(dev
)) {
174 if (map
->type
== _DRM_FRAME_BUFFER
||
175 (map
->flags
& _DRM_WRITE_COMBINING
)) {
176 map
->mtrr
= mtrr_add(map
->offset
, map
->size
,
177 MTRR_TYPE_WRCOMB
, 1);
180 if (map
->type
== _DRM_REGISTERS
) {
181 map
->handle
= ioremap(map
->offset
, map
->size
);
183 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
190 list
= drm_find_matching_map(dev
, map
);
192 if(list
->map
->size
!= map
->size
) {
193 DRM_DEBUG("Matching maps of type %d with "
194 "mismatched sizes, (%ld vs %ld)\n",
195 map
->type
, map
->size
, list
->map
->size
);
196 list
->map
->size
= map
->size
;
199 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
203 map
->handle
= vmalloc_user(map
->size
);
204 DRM_DEBUG("%lu %d %p\n",
205 map
->size
, drm_order(map
->size
), map
->handle
);
207 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
210 map
->offset
= (unsigned long)map
->handle
;
211 if (map
->flags
& _DRM_CONTAINS_LOCK
) {
212 /* Prevent a 2nd X Server from creating a 2nd lock */
213 if (dev
->primary
->master
->lock
.hw_lock
!= NULL
) {
215 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
218 dev
->sigdata
.lock
= dev
->primary
->master
->lock
.hw_lock
= map
->handle
; /* Pointer to lock */
222 struct drm_agp_mem
*entry
;
225 if (!drm_core_has_AGP(dev
)) {
226 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
230 map
->offset
+= dev
->hose
->mem_space
->start
;
232 /* In some cases (i810 driver), user space may have already
233 * added the AGP base itself, because dev->agp->base previously
234 * only got set during AGP enable. So, only add the base
235 * address if the map's offset isn't already within the
238 if (map
->offset
< dev
->agp
->base
||
239 map
->offset
> dev
->agp
->base
+
240 dev
->agp
->agp_info
.aper_size
* 1024 * 1024 - 1) {
241 map
->offset
+= dev
->agp
->base
;
243 map
->mtrr
= dev
->agp
->agp_mtrr
; /* for getmap */
245 /* This assumes the DRM is in total control of AGP space.
246 * It's not always the case as AGP can be in the control
247 * of user space (i.e. i810 driver). So this loop will get
248 * skipped and we double check that dev->agp->memory is
249 * actually set as well as being invalid before EPERM'ing
251 list_for_each_entry(entry
, &dev
->agp
->memory
, head
) {
252 if ((map
->offset
>= entry
->bound
) &&
253 (map
->offset
+ map
->size
<= entry
->bound
+ entry
->pages
* PAGE_SIZE
)) {
258 if (!list_empty(&dev
->agp
->memory
) && !valid
) {
259 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
262 DRM_DEBUG("AGP offset = 0x%08lx, size = 0x%08lx\n", map
->offset
, map
->size
);
266 DRM_ERROR("tried to rmmap GEM object\n");
269 case _DRM_SCATTER_GATHER
:
271 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
274 map
->offset
+= (unsigned long)dev
->sg
->virtual;
276 case _DRM_CONSISTENT
:
277 /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G,
278 * As we're limiting the address to 2^32-1 (or less),
279 * casting it down to 32 bits is no problem, but we
280 * need to point to a 64bit variable first. */
281 dmah
= drm_pci_alloc(dev
, map
->size
, map
->size
, 0xffffffffUL
);
283 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
286 map
->handle
= dmah
->vaddr
;
287 map
->offset
= (unsigned long)dmah
->busaddr
;
291 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
295 list
= drm_alloc(sizeof(*list
), DRM_MEM_MAPS
);
297 if (map
->type
== _DRM_REGISTERS
)
298 iounmap(map
->handle
);
299 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
302 memset(list
, 0, sizeof(*list
));
305 mutex_lock(&dev
->struct_mutex
);
306 list_add(&list
->head
, &dev
->maplist
);
308 /* Assign a 32-bit handle */
309 /* We do it here so that dev->struct_mutex protects the increment */
310 user_token
= (map
->type
== _DRM_SHM
) ? (unsigned long)map
->handle
:
312 ret
= drm_map_handle(dev
, &list
->hash
, user_token
, 0);
314 if (map
->type
== _DRM_REGISTERS
)
315 iounmap(map
->handle
);
316 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
317 drm_free(list
, sizeof(*list
), DRM_MEM_MAPS
);
318 mutex_unlock(&dev
->struct_mutex
);
322 list
->user_token
= list
->hash
.key
<< PAGE_SHIFT
;
323 mutex_unlock(&dev
->struct_mutex
);
325 list
->master
= dev
->primary
->master
;
330 int drm_addmap(struct drm_device
* dev
, unsigned int offset
,
331 unsigned int size
, enum drm_map_type type
,
332 enum drm_map_flags flags
, drm_local_map_t
** map_ptr
)
334 struct drm_map_list
*list
;
337 rc
= drm_addmap_core(dev
, offset
, size
, type
, flags
, &list
);
339 *map_ptr
= list
->map
;
343 EXPORT_SYMBOL(drm_addmap
);
345 int drm_addmap_ioctl(struct drm_device
*dev
, void *data
,
346 struct drm_file
*file_priv
)
348 struct drm_map
*map
= data
;
349 struct drm_map_list
*maplist
;
352 if (!(capable(CAP_SYS_ADMIN
) || map
->type
== _DRM_AGP
|| map
->type
== _DRM_SHM
))
355 err
= drm_addmap_core(dev
, map
->offset
, map
->size
, map
->type
,
356 map
->flags
, &maplist
);
361 /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */
362 map
->handle
= (void *)(unsigned long)maplist
->user_token
;
367 * Remove a map private from list and deallocate resources if the mapping
370 * \param inode device inode.
371 * \param file_priv DRM file private.
372 * \param cmd command.
373 * \param arg pointer to a struct drm_map structure.
374 * \return zero on success or a negative value on error.
376 * Searches the map on drm_device::maplist, removes it from the list, see if
377 * its being used, and free any associate resource (such as MTRR's) if it's not
382 int drm_rmmap_locked(struct drm_device
*dev
, drm_local_map_t
*map
)
384 struct drm_map_list
*r_list
= NULL
, *list_t
;
385 drm_dma_handle_t dmah
;
387 struct drm_master
*master
;
389 /* Find the list entry for the map and remove it */
390 list_for_each_entry_safe(r_list
, list_t
, &dev
->maplist
, head
) {
391 if (r_list
->map
== map
) {
392 master
= r_list
->master
;
393 list_del(&r_list
->head
);
394 drm_ht_remove_key(&dev
->map_hash
,
395 r_list
->user_token
>> PAGE_SHIFT
);
396 drm_free(r_list
, sizeof(*r_list
), DRM_MEM_MAPS
);
407 iounmap(map
->handle
);
409 case _DRM_FRAME_BUFFER
:
410 if (drm_core_has_MTRR(dev
) && map
->mtrr
>= 0) {
412 retcode
= mtrr_del(map
->mtrr
, map
->offset
, map
->size
);
413 DRM_DEBUG("mtrr_del=%d\n", retcode
);
419 if (dev
->sigdata
.lock
== master
->lock
.hw_lock
)
420 dev
->sigdata
.lock
= NULL
;
421 master
->lock
.hw_lock
= NULL
; /* SHM removed */
422 master
->lock
.file_priv
= NULL
;
423 wake_up_interruptible(&master
->lock
.lock_queue
);
427 case _DRM_SCATTER_GATHER
:
429 case _DRM_CONSISTENT
:
430 dmah
.vaddr
= map
->handle
;
431 dmah
.busaddr
= map
->offset
;
432 dmah
.size
= map
->size
;
433 __drm_pci_free(dev
, &dmah
);
436 DRM_ERROR("tried to rmmap GEM object\n");
439 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
444 int drm_rmmap(struct drm_device
*dev
, drm_local_map_t
*map
)
448 mutex_lock(&dev
->struct_mutex
);
449 ret
= drm_rmmap_locked(dev
, map
);
450 mutex_unlock(&dev
->struct_mutex
);
454 EXPORT_SYMBOL(drm_rmmap
);
456 /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on
457 * the last close of the device, and this is necessary for cleanup when things
458 * exit uncleanly. Therefore, having userland manually remove mappings seems
459 * like a pointless exercise since they're going away anyway.
461 * One use case might be after addmap is allowed for normal users for SHM and
462 * gets used by drivers that the server doesn't need to care about. This seems
465 int drm_rmmap_ioctl(struct drm_device
*dev
, void *data
,
466 struct drm_file
*file_priv
)
468 struct drm_map
*request
= data
;
469 drm_local_map_t
*map
= NULL
;
470 struct drm_map_list
*r_list
;
473 mutex_lock(&dev
->struct_mutex
);
474 list_for_each_entry(r_list
, &dev
->maplist
, head
) {
476 r_list
->user_token
== (unsigned long)request
->handle
&&
477 r_list
->map
->flags
& _DRM_REMOVABLE
) {
483 /* List has wrapped around to the head pointer, or its empty we didn't
486 if (list_empty(&dev
->maplist
) || !map
) {
487 mutex_unlock(&dev
->struct_mutex
);
491 /* Register and framebuffer maps are permanent */
492 if ((map
->type
== _DRM_REGISTERS
) || (map
->type
== _DRM_FRAME_BUFFER
)) {
493 mutex_unlock(&dev
->struct_mutex
);
497 ret
= drm_rmmap_locked(dev
, map
);
499 mutex_unlock(&dev
->struct_mutex
);
505 * Cleanup after an error on one of the addbufs() functions.
507 * \param dev DRM device.
508 * \param entry buffer entry where the error occurred.
510 * Frees any pages and buffers associated with the given entry.
512 static void drm_cleanup_buf_error(struct drm_device
* dev
,
513 struct drm_buf_entry
* entry
)
517 if (entry
->seg_count
) {
518 for (i
= 0; i
< entry
->seg_count
; i
++) {
519 if (entry
->seglist
[i
]) {
520 drm_pci_free(dev
, entry
->seglist
[i
]);
523 drm_free(entry
->seglist
,
525 sizeof(*entry
->seglist
), DRM_MEM_SEGS
);
527 entry
->seg_count
= 0;
530 if (entry
->buf_count
) {
531 for (i
= 0; i
< entry
->buf_count
; i
++) {
532 if (entry
->buflist
[i
].dev_private
) {
533 drm_free(entry
->buflist
[i
].dev_private
,
534 entry
->buflist
[i
].dev_priv_size
,
538 drm_free(entry
->buflist
,
540 sizeof(*entry
->buflist
), DRM_MEM_BUFS
);
542 entry
->buf_count
= 0;
548 * Add AGP buffers for DMA transfers.
550 * \param dev struct drm_device to which the buffers are to be added.
551 * \param request pointer to a struct drm_buf_desc describing the request.
552 * \return zero on success or a negative number on failure.
554 * After some sanity checks creates a drm_buf structure for each buffer and
555 * reallocates the buffer list of the same size order to accommodate the new
558 int drm_addbufs_agp(struct drm_device
* dev
, struct drm_buf_desc
* request
)
560 struct drm_device_dma
*dma
= dev
->dma
;
561 struct drm_buf_entry
*entry
;
562 struct drm_agp_mem
*agp_entry
;
564 unsigned long offset
;
565 unsigned long agp_offset
;
574 struct drm_buf
**temp_buflist
;
579 count
= request
->count
;
580 order
= drm_order(request
->size
);
583 alignment
= (request
->flags
& _DRM_PAGE_ALIGN
)
584 ? PAGE_ALIGN(size
) : size
;
585 page_order
= order
- PAGE_SHIFT
> 0 ? order
- PAGE_SHIFT
: 0;
586 total
= PAGE_SIZE
<< page_order
;
589 agp_offset
= dev
->agp
->base
+ request
->agp_start
;
591 DRM_DEBUG("count: %d\n", count
);
592 DRM_DEBUG("order: %d\n", order
);
593 DRM_DEBUG("size: %d\n", size
);
594 DRM_DEBUG("agp_offset: %lx\n", agp_offset
);
595 DRM_DEBUG("alignment: %d\n", alignment
);
596 DRM_DEBUG("page_order: %d\n", page_order
);
597 DRM_DEBUG("total: %d\n", total
);
599 if (order
< DRM_MIN_ORDER
|| order
> DRM_MAX_ORDER
)
601 if (dev
->queue_count
)
602 return -EBUSY
; /* Not while in use */
604 /* Make sure buffers are located in AGP memory that we own */
606 list_for_each_entry(agp_entry
, &dev
->agp
->memory
, head
) {
607 if ((agp_offset
>= agp_entry
->bound
) &&
608 (agp_offset
+ total
* count
<= agp_entry
->bound
+ agp_entry
->pages
* PAGE_SIZE
)) {
613 if (!list_empty(&dev
->agp
->memory
) && !valid
) {
614 DRM_DEBUG("zone invalid\n");
617 spin_lock(&dev
->count_lock
);
619 spin_unlock(&dev
->count_lock
);
622 atomic_inc(&dev
->buf_alloc
);
623 spin_unlock(&dev
->count_lock
);
625 mutex_lock(&dev
->struct_mutex
);
626 entry
= &dma
->bufs
[order
];
627 if (entry
->buf_count
) {
628 mutex_unlock(&dev
->struct_mutex
);
629 atomic_dec(&dev
->buf_alloc
);
630 return -ENOMEM
; /* May only call once for each order */
633 if (count
< 0 || count
> 4096) {
634 mutex_unlock(&dev
->struct_mutex
);
635 atomic_dec(&dev
->buf_alloc
);
639 entry
->buflist
= drm_alloc(count
* sizeof(*entry
->buflist
),
641 if (!entry
->buflist
) {
642 mutex_unlock(&dev
->struct_mutex
);
643 atomic_dec(&dev
->buf_alloc
);
646 memset(entry
->buflist
, 0, count
* sizeof(*entry
->buflist
));
648 entry
->buf_size
= size
;
649 entry
->page_order
= page_order
;
653 while (entry
->buf_count
< count
) {
654 buf
= &entry
->buflist
[entry
->buf_count
];
655 buf
->idx
= dma
->buf_count
+ entry
->buf_count
;
656 buf
->total
= alignment
;
660 buf
->offset
= (dma
->byte_count
+ offset
);
661 buf
->bus_address
= agp_offset
+ offset
;
662 buf
->address
= (void *)(agp_offset
+ offset
);
666 init_waitqueue_head(&buf
->dma_wait
);
667 buf
->file_priv
= NULL
;
669 buf
->dev_priv_size
= dev
->driver
->dev_priv_size
;
670 buf
->dev_private
= drm_alloc(buf
->dev_priv_size
, DRM_MEM_BUFS
);
671 if (!buf
->dev_private
) {
672 /* Set count correctly so we free the proper amount. */
673 entry
->buf_count
= count
;
674 drm_cleanup_buf_error(dev
, entry
);
675 mutex_unlock(&dev
->struct_mutex
);
676 atomic_dec(&dev
->buf_alloc
);
679 memset(buf
->dev_private
, 0, buf
->dev_priv_size
);
681 DRM_DEBUG("buffer %d @ %p\n", entry
->buf_count
, buf
->address
);
685 byte_count
+= PAGE_SIZE
<< page_order
;
688 DRM_DEBUG("byte_count: %d\n", byte_count
);
690 temp_buflist
= drm_realloc(dma
->buflist
,
691 dma
->buf_count
* sizeof(*dma
->buflist
),
692 (dma
->buf_count
+ entry
->buf_count
)
693 * sizeof(*dma
->buflist
), DRM_MEM_BUFS
);
695 /* Free the entry because it isn't valid */
696 drm_cleanup_buf_error(dev
, entry
);
697 mutex_unlock(&dev
->struct_mutex
);
698 atomic_dec(&dev
->buf_alloc
);
701 dma
->buflist
= temp_buflist
;
703 for (i
= 0; i
< entry
->buf_count
; i
++) {
704 dma
->buflist
[i
+ dma
->buf_count
] = &entry
->buflist
[i
];
707 dma
->buf_count
+= entry
->buf_count
;
708 dma
->seg_count
+= entry
->seg_count
;
709 dma
->page_count
+= byte_count
>> PAGE_SHIFT
;
710 dma
->byte_count
+= byte_count
;
712 DRM_DEBUG("dma->buf_count : %d\n", dma
->buf_count
);
713 DRM_DEBUG("entry->buf_count : %d\n", entry
->buf_count
);
715 mutex_unlock(&dev
->struct_mutex
);
717 request
->count
= entry
->buf_count
;
718 request
->size
= size
;
720 dma
->flags
= _DRM_DMA_USE_AGP
;
722 atomic_dec(&dev
->buf_alloc
);
725 EXPORT_SYMBOL(drm_addbufs_agp
);
726 #endif /* __OS_HAS_AGP */
728 int drm_addbufs_pci(struct drm_device
* dev
, struct drm_buf_desc
* request
)
730 struct drm_device_dma
*dma
= dev
->dma
;
736 struct drm_buf_entry
*entry
;
737 drm_dma_handle_t
*dmah
;
740 unsigned long offset
;
744 unsigned long *temp_pagelist
;
745 struct drm_buf
**temp_buflist
;
747 if (!drm_core_check_feature(dev
, DRIVER_PCI_DMA
))
753 if (!capable(CAP_SYS_ADMIN
))
756 count
= request
->count
;
757 order
= drm_order(request
->size
);
760 DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n",
761 request
->count
, request
->size
, size
, order
, dev
->queue_count
);
763 if (order
< DRM_MIN_ORDER
|| order
> DRM_MAX_ORDER
)
765 if (dev
->queue_count
)
766 return -EBUSY
; /* Not while in use */
768 alignment
= (request
->flags
& _DRM_PAGE_ALIGN
)
769 ? PAGE_ALIGN(size
) : size
;
770 page_order
= order
- PAGE_SHIFT
> 0 ? order
- PAGE_SHIFT
: 0;
771 total
= PAGE_SIZE
<< page_order
;
773 spin_lock(&dev
->count_lock
);
775 spin_unlock(&dev
->count_lock
);
778 atomic_inc(&dev
->buf_alloc
);
779 spin_unlock(&dev
->count_lock
);
781 mutex_lock(&dev
->struct_mutex
);
782 entry
= &dma
->bufs
[order
];
783 if (entry
->buf_count
) {
784 mutex_unlock(&dev
->struct_mutex
);
785 atomic_dec(&dev
->buf_alloc
);
786 return -ENOMEM
; /* May only call once for each order */
789 if (count
< 0 || count
> 4096) {
790 mutex_unlock(&dev
->struct_mutex
);
791 atomic_dec(&dev
->buf_alloc
);
795 entry
->buflist
= drm_alloc(count
* sizeof(*entry
->buflist
),
797 if (!entry
->buflist
) {
798 mutex_unlock(&dev
->struct_mutex
);
799 atomic_dec(&dev
->buf_alloc
);
802 memset(entry
->buflist
, 0, count
* sizeof(*entry
->buflist
));
804 entry
->seglist
= drm_alloc(count
* sizeof(*entry
->seglist
),
806 if (!entry
->seglist
) {
807 drm_free(entry
->buflist
,
808 count
* sizeof(*entry
->buflist
), DRM_MEM_BUFS
);
809 mutex_unlock(&dev
->struct_mutex
);
810 atomic_dec(&dev
->buf_alloc
);
813 memset(entry
->seglist
, 0, count
* sizeof(*entry
->seglist
));
815 /* Keep the original pagelist until we know all the allocations
818 temp_pagelist
= drm_alloc((dma
->page_count
+ (count
<< page_order
))
819 * sizeof(*dma
->pagelist
), DRM_MEM_PAGES
);
820 if (!temp_pagelist
) {
821 drm_free(entry
->buflist
,
822 count
* sizeof(*entry
->buflist
), DRM_MEM_BUFS
);
823 drm_free(entry
->seglist
,
824 count
* sizeof(*entry
->seglist
), DRM_MEM_SEGS
);
825 mutex_unlock(&dev
->struct_mutex
);
826 atomic_dec(&dev
->buf_alloc
);
829 memcpy(temp_pagelist
,
830 dma
->pagelist
, dma
->page_count
* sizeof(*dma
->pagelist
));
831 DRM_DEBUG("pagelist: %d entries\n",
832 dma
->page_count
+ (count
<< page_order
));
834 entry
->buf_size
= size
;
835 entry
->page_order
= page_order
;
839 while (entry
->buf_count
< count
) {
841 dmah
= drm_pci_alloc(dev
, PAGE_SIZE
<< page_order
, 0x1000, 0xfffffffful
);
844 /* Set count correctly so we free the proper amount. */
845 entry
->buf_count
= count
;
846 entry
->seg_count
= count
;
847 drm_cleanup_buf_error(dev
, entry
);
848 drm_free(temp_pagelist
,
849 (dma
->page_count
+ (count
<< page_order
))
850 * sizeof(*dma
->pagelist
), DRM_MEM_PAGES
);
851 mutex_unlock(&dev
->struct_mutex
);
852 atomic_dec(&dev
->buf_alloc
);
855 entry
->seglist
[entry
->seg_count
++] = dmah
;
856 for (i
= 0; i
< (1 << page_order
); i
++) {
857 DRM_DEBUG("page %d @ 0x%08lx\n",
858 dma
->page_count
+ page_count
,
859 (unsigned long)dmah
->vaddr
+ PAGE_SIZE
* i
);
860 temp_pagelist
[dma
->page_count
+ page_count
++]
861 = (unsigned long)dmah
->vaddr
+ PAGE_SIZE
* i
;
864 offset
+ size
<= total
&& entry
->buf_count
< count
;
865 offset
+= alignment
, ++entry
->buf_count
) {
866 buf
= &entry
->buflist
[entry
->buf_count
];
867 buf
->idx
= dma
->buf_count
+ entry
->buf_count
;
868 buf
->total
= alignment
;
871 buf
->offset
= (dma
->byte_count
+ byte_count
+ offset
);
872 buf
->address
= (void *)(dmah
->vaddr
+ offset
);
873 buf
->bus_address
= dmah
->busaddr
+ offset
;
877 init_waitqueue_head(&buf
->dma_wait
);
878 buf
->file_priv
= NULL
;
880 buf
->dev_priv_size
= dev
->driver
->dev_priv_size
;
881 buf
->dev_private
= drm_alloc(buf
->dev_priv_size
,
883 if (!buf
->dev_private
) {
884 /* Set count correctly so we free the proper amount. */
885 entry
->buf_count
= count
;
886 entry
->seg_count
= count
;
887 drm_cleanup_buf_error(dev
, entry
);
888 drm_free(temp_pagelist
,
890 (count
<< page_order
))
891 * sizeof(*dma
->pagelist
),
893 mutex_unlock(&dev
->struct_mutex
);
894 atomic_dec(&dev
->buf_alloc
);
897 memset(buf
->dev_private
, 0, buf
->dev_priv_size
);
899 DRM_DEBUG("buffer %d @ %p\n",
900 entry
->buf_count
, buf
->address
);
902 byte_count
+= PAGE_SIZE
<< page_order
;
905 temp_buflist
= drm_realloc(dma
->buflist
,
906 dma
->buf_count
* sizeof(*dma
->buflist
),
907 (dma
->buf_count
+ entry
->buf_count
)
908 * sizeof(*dma
->buflist
), DRM_MEM_BUFS
);
910 /* Free the entry because it isn't valid */
911 drm_cleanup_buf_error(dev
, entry
);
912 drm_free(temp_pagelist
,
913 (dma
->page_count
+ (count
<< page_order
))
914 * sizeof(*dma
->pagelist
), DRM_MEM_PAGES
);
915 mutex_unlock(&dev
->struct_mutex
);
916 atomic_dec(&dev
->buf_alloc
);
919 dma
->buflist
= temp_buflist
;
921 for (i
= 0; i
< entry
->buf_count
; i
++) {
922 dma
->buflist
[i
+ dma
->buf_count
] = &entry
->buflist
[i
];
925 /* No allocations failed, so now we can replace the orginal pagelist
928 if (dma
->page_count
) {
929 drm_free(dma
->pagelist
,
930 dma
->page_count
* sizeof(*dma
->pagelist
),
933 dma
->pagelist
= temp_pagelist
;
935 dma
->buf_count
+= entry
->buf_count
;
936 dma
->seg_count
+= entry
->seg_count
;
937 dma
->page_count
+= entry
->seg_count
<< page_order
;
938 dma
->byte_count
+= PAGE_SIZE
* (entry
->seg_count
<< page_order
);
940 mutex_unlock(&dev
->struct_mutex
);
942 request
->count
= entry
->buf_count
;
943 request
->size
= size
;
945 if (request
->flags
& _DRM_PCI_BUFFER_RO
)
946 dma
->flags
= _DRM_DMA_USE_PCI_RO
;
948 atomic_dec(&dev
->buf_alloc
);
952 EXPORT_SYMBOL(drm_addbufs_pci
);
954 static int drm_addbufs_sg(struct drm_device
* dev
, struct drm_buf_desc
* request
)
956 struct drm_device_dma
*dma
= dev
->dma
;
957 struct drm_buf_entry
*entry
;
959 unsigned long offset
;
960 unsigned long agp_offset
;
969 struct drm_buf
**temp_buflist
;
971 if (!drm_core_check_feature(dev
, DRIVER_SG
))
977 if (!capable(CAP_SYS_ADMIN
))
980 count
= request
->count
;
981 order
= drm_order(request
->size
);
984 alignment
= (request
->flags
& _DRM_PAGE_ALIGN
)
985 ? PAGE_ALIGN(size
) : size
;
986 page_order
= order
- PAGE_SHIFT
> 0 ? order
- PAGE_SHIFT
: 0;
987 total
= PAGE_SIZE
<< page_order
;
990 agp_offset
= request
->agp_start
;
992 DRM_DEBUG("count: %d\n", count
);
993 DRM_DEBUG("order: %d\n", order
);
994 DRM_DEBUG("size: %d\n", size
);
995 DRM_DEBUG("agp_offset: %lu\n", agp_offset
);
996 DRM_DEBUG("alignment: %d\n", alignment
);
997 DRM_DEBUG("page_order: %d\n", page_order
);
998 DRM_DEBUG("total: %d\n", total
);
1000 if (order
< DRM_MIN_ORDER
|| order
> DRM_MAX_ORDER
)
1002 if (dev
->queue_count
)
1003 return -EBUSY
; /* Not while in use */
1005 spin_lock(&dev
->count_lock
);
1007 spin_unlock(&dev
->count_lock
);
1010 atomic_inc(&dev
->buf_alloc
);
1011 spin_unlock(&dev
->count_lock
);
1013 mutex_lock(&dev
->struct_mutex
);
1014 entry
= &dma
->bufs
[order
];
1015 if (entry
->buf_count
) {
1016 mutex_unlock(&dev
->struct_mutex
);
1017 atomic_dec(&dev
->buf_alloc
);
1018 return -ENOMEM
; /* May only call once for each order */
1021 if (count
< 0 || count
> 4096) {
1022 mutex_unlock(&dev
->struct_mutex
);
1023 atomic_dec(&dev
->buf_alloc
);
1027 entry
->buflist
= drm_alloc(count
* sizeof(*entry
->buflist
),
1029 if (!entry
->buflist
) {
1030 mutex_unlock(&dev
->struct_mutex
);
1031 atomic_dec(&dev
->buf_alloc
);
1034 memset(entry
->buflist
, 0, count
* sizeof(*entry
->buflist
));
1036 entry
->buf_size
= size
;
1037 entry
->page_order
= page_order
;
1041 while (entry
->buf_count
< count
) {
1042 buf
= &entry
->buflist
[entry
->buf_count
];
1043 buf
->idx
= dma
->buf_count
+ entry
->buf_count
;
1044 buf
->total
= alignment
;
1048 buf
->offset
= (dma
->byte_count
+ offset
);
1049 buf
->bus_address
= agp_offset
+ offset
;
1050 buf
->address
= (void *)(agp_offset
+ offset
1051 + (unsigned long)dev
->sg
->virtual);
1055 init_waitqueue_head(&buf
->dma_wait
);
1056 buf
->file_priv
= NULL
;
1058 buf
->dev_priv_size
= dev
->driver
->dev_priv_size
;
1059 buf
->dev_private
= drm_alloc(buf
->dev_priv_size
, DRM_MEM_BUFS
);
1060 if (!buf
->dev_private
) {
1061 /* Set count correctly so we free the proper amount. */
1062 entry
->buf_count
= count
;
1063 drm_cleanup_buf_error(dev
, entry
);
1064 mutex_unlock(&dev
->struct_mutex
);
1065 atomic_dec(&dev
->buf_alloc
);
1069 memset(buf
->dev_private
, 0, buf
->dev_priv_size
);
1071 DRM_DEBUG("buffer %d @ %p\n", entry
->buf_count
, buf
->address
);
1073 offset
+= alignment
;
1075 byte_count
+= PAGE_SIZE
<< page_order
;
1078 DRM_DEBUG("byte_count: %d\n", byte_count
);
1080 temp_buflist
= drm_realloc(dma
->buflist
,
1081 dma
->buf_count
* sizeof(*dma
->buflist
),
1082 (dma
->buf_count
+ entry
->buf_count
)
1083 * sizeof(*dma
->buflist
), DRM_MEM_BUFS
);
1084 if (!temp_buflist
) {
1085 /* Free the entry because it isn't valid */
1086 drm_cleanup_buf_error(dev
, entry
);
1087 mutex_unlock(&dev
->struct_mutex
);
1088 atomic_dec(&dev
->buf_alloc
);
1091 dma
->buflist
= temp_buflist
;
1093 for (i
= 0; i
< entry
->buf_count
; i
++) {
1094 dma
->buflist
[i
+ dma
->buf_count
] = &entry
->buflist
[i
];
1097 dma
->buf_count
+= entry
->buf_count
;
1098 dma
->seg_count
+= entry
->seg_count
;
1099 dma
->page_count
+= byte_count
>> PAGE_SHIFT
;
1100 dma
->byte_count
+= byte_count
;
1102 DRM_DEBUG("dma->buf_count : %d\n", dma
->buf_count
);
1103 DRM_DEBUG("entry->buf_count : %d\n", entry
->buf_count
);
1105 mutex_unlock(&dev
->struct_mutex
);
1107 request
->count
= entry
->buf_count
;
1108 request
->size
= size
;
1110 dma
->flags
= _DRM_DMA_USE_SG
;
1112 atomic_dec(&dev
->buf_alloc
);
1116 static int drm_addbufs_fb(struct drm_device
* dev
, struct drm_buf_desc
* request
)
1118 struct drm_device_dma
*dma
= dev
->dma
;
1119 struct drm_buf_entry
*entry
;
1120 struct drm_buf
*buf
;
1121 unsigned long offset
;
1122 unsigned long agp_offset
;
1131 struct drm_buf
**temp_buflist
;
1133 if (!drm_core_check_feature(dev
, DRIVER_FB_DMA
))
1139 if (!capable(CAP_SYS_ADMIN
))
1142 count
= request
->count
;
1143 order
= drm_order(request
->size
);
1146 alignment
= (request
->flags
& _DRM_PAGE_ALIGN
)
1147 ? PAGE_ALIGN(size
) : size
;
1148 page_order
= order
- PAGE_SHIFT
> 0 ? order
- PAGE_SHIFT
: 0;
1149 total
= PAGE_SIZE
<< page_order
;
1152 agp_offset
= request
->agp_start
;
1154 DRM_DEBUG("count: %d\n", count
);
1155 DRM_DEBUG("order: %d\n", order
);
1156 DRM_DEBUG("size: %d\n", size
);
1157 DRM_DEBUG("agp_offset: %lu\n", agp_offset
);
1158 DRM_DEBUG("alignment: %d\n", alignment
);
1159 DRM_DEBUG("page_order: %d\n", page_order
);
1160 DRM_DEBUG("total: %d\n", total
);
1162 if (order
< DRM_MIN_ORDER
|| order
> DRM_MAX_ORDER
)
1164 if (dev
->queue_count
)
1165 return -EBUSY
; /* Not while in use */
1167 spin_lock(&dev
->count_lock
);
1169 spin_unlock(&dev
->count_lock
);
1172 atomic_inc(&dev
->buf_alloc
);
1173 spin_unlock(&dev
->count_lock
);
1175 mutex_lock(&dev
->struct_mutex
);
1176 entry
= &dma
->bufs
[order
];
1177 if (entry
->buf_count
) {
1178 mutex_unlock(&dev
->struct_mutex
);
1179 atomic_dec(&dev
->buf_alloc
);
1180 return -ENOMEM
; /* May only call once for each order */
1183 if (count
< 0 || count
> 4096) {
1184 mutex_unlock(&dev
->struct_mutex
);
1185 atomic_dec(&dev
->buf_alloc
);
1189 entry
->buflist
= drm_alloc(count
* sizeof(*entry
->buflist
),
1191 if (!entry
->buflist
) {
1192 mutex_unlock(&dev
->struct_mutex
);
1193 atomic_dec(&dev
->buf_alloc
);
1196 memset(entry
->buflist
, 0, count
* sizeof(*entry
->buflist
));
1198 entry
->buf_size
= size
;
1199 entry
->page_order
= page_order
;
1203 while (entry
->buf_count
< count
) {
1204 buf
= &entry
->buflist
[entry
->buf_count
];
1205 buf
->idx
= dma
->buf_count
+ entry
->buf_count
;
1206 buf
->total
= alignment
;
1210 buf
->offset
= (dma
->byte_count
+ offset
);
1211 buf
->bus_address
= agp_offset
+ offset
;
1212 buf
->address
= (void *)(agp_offset
+ offset
);
1216 init_waitqueue_head(&buf
->dma_wait
);
1217 buf
->file_priv
= NULL
;
1219 buf
->dev_priv_size
= dev
->driver
->dev_priv_size
;
1220 buf
->dev_private
= drm_alloc(buf
->dev_priv_size
, DRM_MEM_BUFS
);
1221 if (!buf
->dev_private
) {
1222 /* Set count correctly so we free the proper amount. */
1223 entry
->buf_count
= count
;
1224 drm_cleanup_buf_error(dev
, entry
);
1225 mutex_unlock(&dev
->struct_mutex
);
1226 atomic_dec(&dev
->buf_alloc
);
1229 memset(buf
->dev_private
, 0, buf
->dev_priv_size
);
1231 DRM_DEBUG("buffer %d @ %p\n", entry
->buf_count
, buf
->address
);
1233 offset
+= alignment
;
1235 byte_count
+= PAGE_SIZE
<< page_order
;
1238 DRM_DEBUG("byte_count: %d\n", byte_count
);
1240 temp_buflist
= drm_realloc(dma
->buflist
,
1241 dma
->buf_count
* sizeof(*dma
->buflist
),
1242 (dma
->buf_count
+ entry
->buf_count
)
1243 * sizeof(*dma
->buflist
), DRM_MEM_BUFS
);
1244 if (!temp_buflist
) {
1245 /* Free the entry because it isn't valid */
1246 drm_cleanup_buf_error(dev
, entry
);
1247 mutex_unlock(&dev
->struct_mutex
);
1248 atomic_dec(&dev
->buf_alloc
);
1251 dma
->buflist
= temp_buflist
;
1253 for (i
= 0; i
< entry
->buf_count
; i
++) {
1254 dma
->buflist
[i
+ dma
->buf_count
] = &entry
->buflist
[i
];
1257 dma
->buf_count
+= entry
->buf_count
;
1258 dma
->seg_count
+= entry
->seg_count
;
1259 dma
->page_count
+= byte_count
>> PAGE_SHIFT
;
1260 dma
->byte_count
+= byte_count
;
1262 DRM_DEBUG("dma->buf_count : %d\n", dma
->buf_count
);
1263 DRM_DEBUG("entry->buf_count : %d\n", entry
->buf_count
);
1265 mutex_unlock(&dev
->struct_mutex
);
1267 request
->count
= entry
->buf_count
;
1268 request
->size
= size
;
1270 dma
->flags
= _DRM_DMA_USE_FB
;
1272 atomic_dec(&dev
->buf_alloc
);
1278 * Add buffers for DMA transfers (ioctl).
1280 * \param inode device inode.
1281 * \param file_priv DRM file private.
1282 * \param cmd command.
1283 * \param arg pointer to a struct drm_buf_desc request.
1284 * \return zero on success or a negative number on failure.
1286 * According with the memory type specified in drm_buf_desc::flags and the
1287 * build options, it dispatches the call either to addbufs_agp(),
1288 * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent
1289 * PCI memory respectively.
1291 int drm_addbufs(struct drm_device
*dev
, void *data
,
1292 struct drm_file
*file_priv
)
1294 struct drm_buf_desc
*request
= data
;
1297 if (!drm_core_check_feature(dev
, DRIVER_HAVE_DMA
))
1301 if (request
->flags
& _DRM_AGP_BUFFER
)
1302 ret
= drm_addbufs_agp(dev
, request
);
1305 if (request
->flags
& _DRM_SG_BUFFER
)
1306 ret
= drm_addbufs_sg(dev
, request
);
1307 else if (request
->flags
& _DRM_FB_BUFFER
)
1308 ret
= drm_addbufs_fb(dev
, request
);
1310 ret
= drm_addbufs_pci(dev
, request
);
1316 * Get information about the buffer mappings.
1318 * This was originally mean for debugging purposes, or by a sophisticated
1319 * client library to determine how best to use the available buffers (e.g.,
1320 * large buffers can be used for image transfer).
1322 * \param inode device inode.
1323 * \param file_priv DRM file private.
1324 * \param cmd command.
1325 * \param arg pointer to a drm_buf_info structure.
1326 * \return zero on success or a negative number on failure.
1328 * Increments drm_device::buf_use while holding the drm_device::count_lock
1329 * lock, preventing of allocating more buffers after this call. Information
1330 * about each requested buffer is then copied into user space.
1332 int drm_infobufs(struct drm_device
*dev
, void *data
,
1333 struct drm_file
*file_priv
)
1335 struct drm_device_dma
*dma
= dev
->dma
;
1336 struct drm_buf_info
*request
= data
;
1340 if (!drm_core_check_feature(dev
, DRIVER_HAVE_DMA
))
1346 spin_lock(&dev
->count_lock
);
1347 if (atomic_read(&dev
->buf_alloc
)) {
1348 spin_unlock(&dev
->count_lock
);
1351 ++dev
->buf_use
; /* Can't allocate more after this call */
1352 spin_unlock(&dev
->count_lock
);
1354 for (i
= 0, count
= 0; i
< DRM_MAX_ORDER
+ 1; i
++) {
1355 if (dma
->bufs
[i
].buf_count
)
1359 DRM_DEBUG("count = %d\n", count
);
1361 if (request
->count
>= count
) {
1362 for (i
= 0, count
= 0; i
< DRM_MAX_ORDER
+ 1; i
++) {
1363 if (dma
->bufs
[i
].buf_count
) {
1364 struct drm_buf_desc __user
*to
=
1365 &request
->list
[count
];
1366 struct drm_buf_entry
*from
= &dma
->bufs
[i
];
1367 struct drm_freelist
*list
= &dma
->bufs
[i
].freelist
;
1368 if (copy_to_user(&to
->count
,
1370 sizeof(from
->buf_count
)) ||
1371 copy_to_user(&to
->size
,
1373 sizeof(from
->buf_size
)) ||
1374 copy_to_user(&to
->low_mark
,
1376 sizeof(list
->low_mark
)) ||
1377 copy_to_user(&to
->high_mark
,
1379 sizeof(list
->high_mark
)))
1382 DRM_DEBUG("%d %d %d %d %d\n",
1384 dma
->bufs
[i
].buf_count
,
1385 dma
->bufs
[i
].buf_size
,
1386 dma
->bufs
[i
].freelist
.low_mark
,
1387 dma
->bufs
[i
].freelist
.high_mark
);
1392 request
->count
= count
;
1398 * Specifies a low and high water mark for buffer allocation
1400 * \param inode device inode.
1401 * \param file_priv DRM file private.
1402 * \param cmd command.
1403 * \param arg a pointer to a drm_buf_desc structure.
1404 * \return zero on success or a negative number on failure.
1406 * Verifies that the size order is bounded between the admissible orders and
1407 * updates the respective drm_device_dma::bufs entry low and high water mark.
1409 * \note This ioctl is deprecated and mostly never used.
1411 int drm_markbufs(struct drm_device
*dev
, void *data
,
1412 struct drm_file
*file_priv
)
1414 struct drm_device_dma
*dma
= dev
->dma
;
1415 struct drm_buf_desc
*request
= data
;
1417 struct drm_buf_entry
*entry
;
1419 if (!drm_core_check_feature(dev
, DRIVER_HAVE_DMA
))
1425 DRM_DEBUG("%d, %d, %d\n",
1426 request
->size
, request
->low_mark
, request
->high_mark
);
1427 order
= drm_order(request
->size
);
1428 if (order
< DRM_MIN_ORDER
|| order
> DRM_MAX_ORDER
)
1430 entry
= &dma
->bufs
[order
];
1432 if (request
->low_mark
< 0 || request
->low_mark
> entry
->buf_count
)
1434 if (request
->high_mark
< 0 || request
->high_mark
> entry
->buf_count
)
1437 entry
->freelist
.low_mark
= request
->low_mark
;
1438 entry
->freelist
.high_mark
= request
->high_mark
;
1444 * Unreserve the buffers in list, previously reserved using drmDMA.
1446 * \param inode device inode.
1447 * \param file_priv DRM file private.
1448 * \param cmd command.
1449 * \param arg pointer to a drm_buf_free structure.
1450 * \return zero on success or a negative number on failure.
1452 * Calls free_buffer() for each used buffer.
1453 * This function is primarily used for debugging.
1455 int drm_freebufs(struct drm_device
*dev
, void *data
,
1456 struct drm_file
*file_priv
)
1458 struct drm_device_dma
*dma
= dev
->dma
;
1459 struct drm_buf_free
*request
= data
;
1462 struct drm_buf
*buf
;
1464 if (!drm_core_check_feature(dev
, DRIVER_HAVE_DMA
))
1470 DRM_DEBUG("%d\n", request
->count
);
1471 for (i
= 0; i
< request
->count
; i
++) {
1472 if (copy_from_user(&idx
, &request
->list
[i
], sizeof(idx
)))
1474 if (idx
< 0 || idx
>= dma
->buf_count
) {
1475 DRM_ERROR("Index %d (of %d max)\n",
1476 idx
, dma
->buf_count
- 1);
1479 buf
= dma
->buflist
[idx
];
1480 if (buf
->file_priv
!= file_priv
) {
1481 DRM_ERROR("Process %d freeing buffer not owned\n",
1482 task_pid_nr(current
));
1485 drm_free_buffer(dev
, buf
);
1492 * Maps all of the DMA buffers into client-virtual space (ioctl).
1494 * \param inode device inode.
1495 * \param file_priv DRM file private.
1496 * \param cmd command.
1497 * \param arg pointer to a drm_buf_map structure.
1498 * \return zero on success or a negative number on failure.
1500 * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information
1501 * about each buffer into user space. For PCI buffers, it calls do_mmap() with
1502 * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls
1505 int drm_mapbufs(struct drm_device
*dev
, void *data
,
1506 struct drm_file
*file_priv
)
1508 struct drm_device_dma
*dma
= dev
->dma
;
1511 unsigned long virtual;
1512 unsigned long address
;
1513 struct drm_buf_map
*request
= data
;
1516 if (!drm_core_check_feature(dev
, DRIVER_HAVE_DMA
))
1522 spin_lock(&dev
->count_lock
);
1523 if (atomic_read(&dev
->buf_alloc
)) {
1524 spin_unlock(&dev
->count_lock
);
1527 dev
->buf_use
++; /* Can't allocate more after this call */
1528 spin_unlock(&dev
->count_lock
);
1530 if (request
->count
>= dma
->buf_count
) {
1531 if ((drm_core_has_AGP(dev
) && (dma
->flags
& _DRM_DMA_USE_AGP
))
1532 || (drm_core_check_feature(dev
, DRIVER_SG
)
1533 && (dma
->flags
& _DRM_DMA_USE_SG
))
1534 || (drm_core_check_feature(dev
, DRIVER_FB_DMA
)
1535 && (dma
->flags
& _DRM_DMA_USE_FB
))) {
1536 struct drm_map
*map
= dev
->agp_buffer_map
;
1537 unsigned long token
= dev
->agp_buffer_token
;
1543 down_write(¤t
->mm
->mmap_sem
);
1544 virtual = do_mmap(file_priv
->filp
, 0, map
->size
,
1545 PROT_READ
| PROT_WRITE
,
1548 up_write(¤t
->mm
->mmap_sem
);
1550 down_write(¤t
->mm
->mmap_sem
);
1551 virtual = do_mmap(file_priv
->filp
, 0, dma
->byte_count
,
1552 PROT_READ
| PROT_WRITE
,
1554 up_write(¤t
->mm
->mmap_sem
);
1556 if (virtual > -1024UL) {
1558 retcode
= (signed long)virtual;
1561 request
->virtual = (void __user
*)virtual;
1563 for (i
= 0; i
< dma
->buf_count
; i
++) {
1564 if (copy_to_user(&request
->list
[i
].idx
,
1565 &dma
->buflist
[i
]->idx
,
1566 sizeof(request
->list
[0].idx
))) {
1570 if (copy_to_user(&request
->list
[i
].total
,
1571 &dma
->buflist
[i
]->total
,
1572 sizeof(request
->list
[0].total
))) {
1576 if (copy_to_user(&request
->list
[i
].used
,
1577 &zero
, sizeof(zero
))) {
1581 address
= virtual + dma
->buflist
[i
]->offset
; /* *** */
1582 if (copy_to_user(&request
->list
[i
].address
,
1583 &address
, sizeof(address
))) {
1590 request
->count
= dma
->buf_count
;
1591 DRM_DEBUG("%d buffers, retcode = %d\n", request
->count
, retcode
);
1597 * Compute size order. Returns the exponent of the smaller power of two which
1598 * is greater or equal to given number.
1603 * \todo Can be made faster.
1605 int drm_order(unsigned long size
)
1610 for (order
= 0, tmp
= size
>> 1; tmp
; tmp
>>= 1, order
++) ;
1612 if (size
& (size
- 1))
1617 EXPORT_SYMBOL(drm_order
);
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