]>
git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/char/drm/drm_bufs.c
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
&& 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 filp file pointer.
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
);
184 list
= drm_find_matching_map(dev
, map
);
186 if(list
->map
->size
!= map
->size
) {
187 DRM_DEBUG("Matching maps of type %d with "
188 "mismatched sizes, (%ld vs %ld)\n",
189 map
->type
, map
->size
, list
->map
->size
);
190 list
->map
->size
= map
->size
;
193 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
197 map
->handle
= vmalloc_user(map
->size
);
198 DRM_DEBUG("%lu %d %p\n",
199 map
->size
, drm_order(map
->size
), map
->handle
);
201 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
204 map
->offset
= (unsigned long)map
->handle
;
205 if (map
->flags
& _DRM_CONTAINS_LOCK
) {
206 /* Prevent a 2nd X Server from creating a 2nd lock */
207 if (dev
->lock
.hw_lock
!= NULL
) {
209 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
212 dev
->sigdata
.lock
= dev
->lock
.hw_lock
= map
->handle
; /* Pointer to lock */
216 struct drm_agp_mem
*entry
;
219 if (!drm_core_has_AGP(dev
)) {
220 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
224 map
->offset
+= dev
->hose
->mem_space
->start
;
226 /* Note: dev->agp->base may actually be 0 when the DRM
227 * is not in control of AGP space. But if user space is
228 * it should already have added the AGP base itself.
230 map
->offset
+= dev
->agp
->base
;
231 map
->mtrr
= dev
->agp
->agp_mtrr
; /* for getmap */
233 /* This assumes the DRM is in total control of AGP space.
234 * It's not always the case as AGP can be in the control
235 * of user space (i.e. i810 driver). So this loop will get
236 * skipped and we double check that dev->agp->memory is
237 * actually set as well as being invalid before EPERM'ing
239 list_for_each_entry(entry
, &dev
->agp
->memory
, head
) {
240 if ((map
->offset
>= entry
->bound
) &&
241 (map
->offset
+ map
->size
<= entry
->bound
+ entry
->pages
* PAGE_SIZE
)) {
246 if (!list_empty(&dev
->agp
->memory
) && !valid
) {
247 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
250 DRM_DEBUG("AGP offset = 0x%08lx, size = 0x%08lx\n", map
->offset
, map
->size
);
254 case _DRM_SCATTER_GATHER
:
256 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
259 map
->offset
+= (unsigned long)dev
->sg
->virtual;
261 case _DRM_CONSISTENT
:
262 /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G,
263 * As we're limiting the address to 2^32-1 (or less),
264 * casting it down to 32 bits is no problem, but we
265 * need to point to a 64bit variable first. */
266 dmah
= drm_pci_alloc(dev
, map
->size
, map
->size
, 0xffffffffUL
);
268 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
271 map
->handle
= dmah
->vaddr
;
272 map
->offset
= (unsigned long)dmah
->busaddr
;
276 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
280 list
= drm_alloc(sizeof(*list
), DRM_MEM_MAPS
);
282 if (map
->type
== _DRM_REGISTERS
)
283 iounmap(map
->handle
);
284 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
287 memset(list
, 0, sizeof(*list
));
290 mutex_lock(&dev
->struct_mutex
);
291 list_add(&list
->head
, &dev
->maplist
);
293 /* Assign a 32-bit handle */
294 /* We do it here so that dev->struct_mutex protects the increment */
295 user_token
= (map
->type
== _DRM_SHM
) ? (unsigned long)map
->handle
:
297 ret
= drm_map_handle(dev
, &list
->hash
, user_token
, 0);
299 if (map
->type
== _DRM_REGISTERS
)
300 iounmap(map
->handle
);
301 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
302 drm_free(list
, sizeof(*list
), DRM_MEM_MAPS
);
303 mutex_unlock(&dev
->struct_mutex
);
307 list
->user_token
= list
->hash
.key
<< PAGE_SHIFT
;
308 mutex_unlock(&dev
->struct_mutex
);
314 int drm_addmap(struct drm_device
* dev
, unsigned int offset
,
315 unsigned int size
, enum drm_map_type type
,
316 enum drm_map_flags flags
, drm_local_map_t
** map_ptr
)
318 struct drm_map_list
*list
;
321 rc
= drm_addmap_core(dev
, offset
, size
, type
, flags
, &list
);
323 *map_ptr
= list
->map
;
327 EXPORT_SYMBOL(drm_addmap
);
329 int drm_addmap_ioctl(struct inode
*inode
, struct file
*filp
,
330 unsigned int cmd
, unsigned long arg
)
332 struct drm_file
*priv
= filp
->private_data
;
333 struct drm_device
*dev
= priv
->head
->dev
;
335 struct drm_map_list
*maplist
;
336 struct drm_map __user
*argp
= (void __user
*)arg
;
339 if (!(filp
->f_mode
& 3))
340 return -EACCES
; /* Require read/write */
342 if (copy_from_user(&map
, argp
, sizeof(map
))) {
346 if (!(capable(CAP_SYS_ADMIN
) || map
.type
== _DRM_AGP
))
349 err
= drm_addmap_core(dev
, map
.offset
, map
.size
, map
.type
, map
.flags
,
355 if (copy_to_user(argp
, maplist
->map
, sizeof(struct drm_map
)))
358 /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */
359 if (put_user((void *)(unsigned long)maplist
->user_token
, &argp
->handle
))
365 * Remove a map private from list and deallocate resources if the mapping
368 * \param inode device inode.
369 * \param filp file pointer.
370 * \param cmd command.
371 * \param arg pointer to a struct drm_map structure.
372 * \return zero on success or a negative value on error.
374 * Searches the map on drm_device::maplist, removes it from the list, see if
375 * its being used, and free any associate resource (such as MTRR's) if it's not
380 int drm_rmmap_locked(struct drm_device
*dev
, drm_local_map_t
*map
)
382 struct drm_map_list
*r_list
= NULL
, *list_t
;
383 drm_dma_handle_t dmah
;
386 /* Find the list entry for the map and remove it */
387 list_for_each_entry_safe(r_list
, list_t
, &dev
->maplist
, head
) {
388 if (r_list
->map
== map
) {
389 list_del(&r_list
->head
);
390 drm_ht_remove_key(&dev
->map_hash
,
391 r_list
->user_token
>> PAGE_SHIFT
);
392 drm_free(r_list
, sizeof(*r_list
), DRM_MEM_MAPS
);
403 iounmap(map
->handle
);
405 case _DRM_FRAME_BUFFER
:
406 if (drm_core_has_MTRR(dev
) && map
->mtrr
>= 0) {
408 retcode
= mtrr_del(map
->mtrr
, map
->offset
, map
->size
);
409 DRM_DEBUG("mtrr_del=%d\n", retcode
);
416 case _DRM_SCATTER_GATHER
:
418 case _DRM_CONSISTENT
:
419 dmah
.vaddr
= map
->handle
;
420 dmah
.busaddr
= map
->offset
;
421 dmah
.size
= map
->size
;
422 __drm_pci_free(dev
, &dmah
);
425 drm_free(map
, sizeof(*map
), DRM_MEM_MAPS
);
430 int drm_rmmap(struct drm_device
*dev
, drm_local_map_t
*map
)
434 mutex_lock(&dev
->struct_mutex
);
435 ret
= drm_rmmap_locked(dev
, map
);
436 mutex_unlock(&dev
->struct_mutex
);
441 /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on
442 * the last close of the device, and this is necessary for cleanup when things
443 * exit uncleanly. Therefore, having userland manually remove mappings seems
444 * like a pointless exercise since they're going away anyway.
446 * One use case might be after addmap is allowed for normal users for SHM and
447 * gets used by drivers that the server doesn't need to care about. This seems
450 int drm_rmmap_ioctl(struct inode
*inode
, struct file
*filp
,
451 unsigned int cmd
, unsigned long arg
)
453 struct drm_file
*priv
= filp
->private_data
;
454 struct drm_device
*dev
= priv
->head
->dev
;
455 struct drm_map request
;
456 drm_local_map_t
*map
= NULL
;
457 struct drm_map_list
*r_list
;
460 if (copy_from_user(&request
, (struct drm_map __user
*) arg
, sizeof(request
))) {
464 mutex_lock(&dev
->struct_mutex
);
465 list_for_each_entry(r_list
, &dev
->maplist
, head
) {
467 r_list
->user_token
== (unsigned long)request
.handle
&&
468 r_list
->map
->flags
& _DRM_REMOVABLE
) {
474 /* List has wrapped around to the head pointer, or its empty we didn't
477 if (list_empty(&dev
->maplist
) || !map
) {
478 mutex_unlock(&dev
->struct_mutex
);
483 mutex_unlock(&dev
->struct_mutex
);
487 /* Register and framebuffer maps are permanent */
488 if ((map
->type
== _DRM_REGISTERS
) || (map
->type
== _DRM_FRAME_BUFFER
)) {
489 mutex_unlock(&dev
->struct_mutex
);
493 ret
= drm_rmmap_locked(dev
, map
);
495 mutex_unlock(&dev
->struct_mutex
);
501 * Cleanup after an error on one of the addbufs() functions.
503 * \param dev DRM device.
504 * \param entry buffer entry where the error occurred.
506 * Frees any pages and buffers associated with the given entry.
508 static void drm_cleanup_buf_error(struct drm_device
* dev
,
509 struct drm_buf_entry
* entry
)
513 if (entry
->seg_count
) {
514 for (i
= 0; i
< entry
->seg_count
; i
++) {
515 if (entry
->seglist
[i
]) {
516 drm_pci_free(dev
, entry
->seglist
[i
]);
519 drm_free(entry
->seglist
,
521 sizeof(*entry
->seglist
), DRM_MEM_SEGS
);
523 entry
->seg_count
= 0;
526 if (entry
->buf_count
) {
527 for (i
= 0; i
< entry
->buf_count
; i
++) {
528 if (entry
->buflist
[i
].dev_private
) {
529 drm_free(entry
->buflist
[i
].dev_private
,
530 entry
->buflist
[i
].dev_priv_size
,
534 drm_free(entry
->buflist
,
536 sizeof(*entry
->buflist
), DRM_MEM_BUFS
);
538 entry
->buf_count
= 0;
544 * Add AGP buffers for DMA transfers.
546 * \param dev struct drm_device to which the buffers are to be added.
547 * \param request pointer to a struct drm_buf_desc describing the request.
548 * \return zero on success or a negative number on failure.
550 * After some sanity checks creates a drm_buf structure for each buffer and
551 * reallocates the buffer list of the same size order to accommodate the new
554 int drm_addbufs_agp(struct drm_device
* dev
, struct drm_buf_desc
* request
)
556 struct drm_device_dma
*dma
= dev
->dma
;
557 struct drm_buf_entry
*entry
;
558 struct drm_agp_mem
*agp_entry
;
560 unsigned long offset
;
561 unsigned long agp_offset
;
570 struct drm_buf
**temp_buflist
;
575 count
= request
->count
;
576 order
= drm_order(request
->size
);
579 alignment
= (request
->flags
& _DRM_PAGE_ALIGN
)
580 ? PAGE_ALIGN(size
) : size
;
581 page_order
= order
- PAGE_SHIFT
> 0 ? order
- PAGE_SHIFT
: 0;
582 total
= PAGE_SIZE
<< page_order
;
585 agp_offset
= dev
->agp
->base
+ request
->agp_start
;
587 DRM_DEBUG("count: %d\n", count
);
588 DRM_DEBUG("order: %d\n", order
);
589 DRM_DEBUG("size: %d\n", size
);
590 DRM_DEBUG("agp_offset: %lx\n", agp_offset
);
591 DRM_DEBUG("alignment: %d\n", alignment
);
592 DRM_DEBUG("page_order: %d\n", page_order
);
593 DRM_DEBUG("total: %d\n", total
);
595 if (order
< DRM_MIN_ORDER
|| order
> DRM_MAX_ORDER
)
597 if (dev
->queue_count
)
598 return -EBUSY
; /* Not while in use */
600 /* Make sure buffers are located in AGP memory that we own */
602 list_for_each_entry(agp_entry
, &dev
->agp
->memory
, head
) {
603 if ((agp_offset
>= agp_entry
->bound
) &&
604 (agp_offset
+ total
* count
<= agp_entry
->bound
+ agp_entry
->pages
* PAGE_SIZE
)) {
609 if (!list_empty(&dev
->agp
->memory
) && !valid
) {
610 DRM_DEBUG("zone invalid\n");
613 spin_lock(&dev
->count_lock
);
615 spin_unlock(&dev
->count_lock
);
618 atomic_inc(&dev
->buf_alloc
);
619 spin_unlock(&dev
->count_lock
);
621 mutex_lock(&dev
->struct_mutex
);
622 entry
= &dma
->bufs
[order
];
623 if (entry
->buf_count
) {
624 mutex_unlock(&dev
->struct_mutex
);
625 atomic_dec(&dev
->buf_alloc
);
626 return -ENOMEM
; /* May only call once for each order */
629 if (count
< 0 || count
> 4096) {
630 mutex_unlock(&dev
->struct_mutex
);
631 atomic_dec(&dev
->buf_alloc
);
635 entry
->buflist
= drm_alloc(count
* sizeof(*entry
->buflist
),
637 if (!entry
->buflist
) {
638 mutex_unlock(&dev
->struct_mutex
);
639 atomic_dec(&dev
->buf_alloc
);
642 memset(entry
->buflist
, 0, count
* sizeof(*entry
->buflist
));
644 entry
->buf_size
= size
;
645 entry
->page_order
= page_order
;
649 while (entry
->buf_count
< count
) {
650 buf
= &entry
->buflist
[entry
->buf_count
];
651 buf
->idx
= dma
->buf_count
+ entry
->buf_count
;
652 buf
->total
= alignment
;
656 buf
->offset
= (dma
->byte_count
+ offset
);
657 buf
->bus_address
= agp_offset
+ offset
;
658 buf
->address
= (void *)(agp_offset
+ offset
);
662 init_waitqueue_head(&buf
->dma_wait
);
665 buf
->dev_priv_size
= dev
->driver
->dev_priv_size
;
666 buf
->dev_private
= drm_alloc(buf
->dev_priv_size
, DRM_MEM_BUFS
);
667 if (!buf
->dev_private
) {
668 /* Set count correctly so we free the proper amount. */
669 entry
->buf_count
= count
;
670 drm_cleanup_buf_error(dev
, entry
);
671 mutex_unlock(&dev
->struct_mutex
);
672 atomic_dec(&dev
->buf_alloc
);
675 memset(buf
->dev_private
, 0, buf
->dev_priv_size
);
677 DRM_DEBUG("buffer %d @ %p\n", entry
->buf_count
, buf
->address
);
681 byte_count
+= PAGE_SIZE
<< page_order
;
684 DRM_DEBUG("byte_count: %d\n", byte_count
);
686 temp_buflist
= drm_realloc(dma
->buflist
,
687 dma
->buf_count
* sizeof(*dma
->buflist
),
688 (dma
->buf_count
+ entry
->buf_count
)
689 * sizeof(*dma
->buflist
), DRM_MEM_BUFS
);
691 /* Free the entry because it isn't valid */
692 drm_cleanup_buf_error(dev
, entry
);
693 mutex_unlock(&dev
->struct_mutex
);
694 atomic_dec(&dev
->buf_alloc
);
697 dma
->buflist
= temp_buflist
;
699 for (i
= 0; i
< entry
->buf_count
; i
++) {
700 dma
->buflist
[i
+ dma
->buf_count
] = &entry
->buflist
[i
];
703 dma
->buf_count
+= entry
->buf_count
;
704 dma
->seg_count
+= entry
->seg_count
;
705 dma
->page_count
+= byte_count
>> PAGE_SHIFT
;
706 dma
->byte_count
+= byte_count
;
708 DRM_DEBUG("dma->buf_count : %d\n", dma
->buf_count
);
709 DRM_DEBUG("entry->buf_count : %d\n", entry
->buf_count
);
711 mutex_unlock(&dev
->struct_mutex
);
713 request
->count
= entry
->buf_count
;
714 request
->size
= size
;
716 dma
->flags
= _DRM_DMA_USE_AGP
;
718 atomic_dec(&dev
->buf_alloc
);
721 EXPORT_SYMBOL(drm_addbufs_agp
);
722 #endif /* __OS_HAS_AGP */
724 int drm_addbufs_pci(struct drm_device
* dev
, struct drm_buf_desc
* request
)
726 struct drm_device_dma
*dma
= dev
->dma
;
732 struct drm_buf_entry
*entry
;
733 drm_dma_handle_t
*dmah
;
736 unsigned long offset
;
740 unsigned long *temp_pagelist
;
741 struct drm_buf
**temp_buflist
;
743 if (!drm_core_check_feature(dev
, DRIVER_PCI_DMA
))
749 if (!capable(CAP_SYS_ADMIN
))
752 count
= request
->count
;
753 order
= drm_order(request
->size
);
756 DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n",
757 request
->count
, request
->size
, size
, order
, dev
->queue_count
);
759 if (order
< DRM_MIN_ORDER
|| order
> DRM_MAX_ORDER
)
761 if (dev
->queue_count
)
762 return -EBUSY
; /* Not while in use */
764 alignment
= (request
->flags
& _DRM_PAGE_ALIGN
)
765 ? PAGE_ALIGN(size
) : size
;
766 page_order
= order
- PAGE_SHIFT
> 0 ? order
- PAGE_SHIFT
: 0;
767 total
= PAGE_SIZE
<< page_order
;
769 spin_lock(&dev
->count_lock
);
771 spin_unlock(&dev
->count_lock
);
774 atomic_inc(&dev
->buf_alloc
);
775 spin_unlock(&dev
->count_lock
);
777 mutex_lock(&dev
->struct_mutex
);
778 entry
= &dma
->bufs
[order
];
779 if (entry
->buf_count
) {
780 mutex_unlock(&dev
->struct_mutex
);
781 atomic_dec(&dev
->buf_alloc
);
782 return -ENOMEM
; /* May only call once for each order */
785 if (count
< 0 || count
> 4096) {
786 mutex_unlock(&dev
->struct_mutex
);
787 atomic_dec(&dev
->buf_alloc
);
791 entry
->buflist
= drm_alloc(count
* sizeof(*entry
->buflist
),
793 if (!entry
->buflist
) {
794 mutex_unlock(&dev
->struct_mutex
);
795 atomic_dec(&dev
->buf_alloc
);
798 memset(entry
->buflist
, 0, count
* sizeof(*entry
->buflist
));
800 entry
->seglist
= drm_alloc(count
* sizeof(*entry
->seglist
),
802 if (!entry
->seglist
) {
803 drm_free(entry
->buflist
,
804 count
* sizeof(*entry
->buflist
), DRM_MEM_BUFS
);
805 mutex_unlock(&dev
->struct_mutex
);
806 atomic_dec(&dev
->buf_alloc
);
809 memset(entry
->seglist
, 0, count
* sizeof(*entry
->seglist
));
811 /* Keep the original pagelist until we know all the allocations
814 temp_pagelist
= drm_alloc((dma
->page_count
+ (count
<< page_order
))
815 * sizeof(*dma
->pagelist
), DRM_MEM_PAGES
);
816 if (!temp_pagelist
) {
817 drm_free(entry
->buflist
,
818 count
* sizeof(*entry
->buflist
), DRM_MEM_BUFS
);
819 drm_free(entry
->seglist
,
820 count
* sizeof(*entry
->seglist
), DRM_MEM_SEGS
);
821 mutex_unlock(&dev
->struct_mutex
);
822 atomic_dec(&dev
->buf_alloc
);
825 memcpy(temp_pagelist
,
826 dma
->pagelist
, dma
->page_count
* sizeof(*dma
->pagelist
));
827 DRM_DEBUG("pagelist: %d entries\n",
828 dma
->page_count
+ (count
<< page_order
));
830 entry
->buf_size
= size
;
831 entry
->page_order
= page_order
;
835 while (entry
->buf_count
< count
) {
837 dmah
= drm_pci_alloc(dev
, PAGE_SIZE
<< page_order
, 0x1000, 0xfffffffful
);
840 /* Set count correctly so we free the proper amount. */
841 entry
->buf_count
= count
;
842 entry
->seg_count
= count
;
843 drm_cleanup_buf_error(dev
, entry
);
844 drm_free(temp_pagelist
,
845 (dma
->page_count
+ (count
<< page_order
))
846 * sizeof(*dma
->pagelist
), DRM_MEM_PAGES
);
847 mutex_unlock(&dev
->struct_mutex
);
848 atomic_dec(&dev
->buf_alloc
);
851 entry
->seglist
[entry
->seg_count
++] = dmah
;
852 for (i
= 0; i
< (1 << page_order
); i
++) {
853 DRM_DEBUG("page %d @ 0x%08lx\n",
854 dma
->page_count
+ page_count
,
855 (unsigned long)dmah
->vaddr
+ PAGE_SIZE
* i
);
856 temp_pagelist
[dma
->page_count
+ page_count
++]
857 = (unsigned long)dmah
->vaddr
+ PAGE_SIZE
* i
;
860 offset
+ size
<= total
&& entry
->buf_count
< count
;
861 offset
+= alignment
, ++entry
->buf_count
) {
862 buf
= &entry
->buflist
[entry
->buf_count
];
863 buf
->idx
= dma
->buf_count
+ entry
->buf_count
;
864 buf
->total
= alignment
;
867 buf
->offset
= (dma
->byte_count
+ byte_count
+ offset
);
868 buf
->address
= (void *)(dmah
->vaddr
+ offset
);
869 buf
->bus_address
= dmah
->busaddr
+ offset
;
873 init_waitqueue_head(&buf
->dma_wait
);
876 buf
->dev_priv_size
= dev
->driver
->dev_priv_size
;
877 buf
->dev_private
= drm_alloc(buf
->dev_priv_size
,
879 if (!buf
->dev_private
) {
880 /* Set count correctly so we free the proper amount. */
881 entry
->buf_count
= count
;
882 entry
->seg_count
= count
;
883 drm_cleanup_buf_error(dev
, entry
);
884 drm_free(temp_pagelist
,
886 (count
<< page_order
))
887 * sizeof(*dma
->pagelist
),
889 mutex_unlock(&dev
->struct_mutex
);
890 atomic_dec(&dev
->buf_alloc
);
893 memset(buf
->dev_private
, 0, buf
->dev_priv_size
);
895 DRM_DEBUG("buffer %d @ %p\n",
896 entry
->buf_count
, buf
->address
);
898 byte_count
+= PAGE_SIZE
<< page_order
;
901 temp_buflist
= drm_realloc(dma
->buflist
,
902 dma
->buf_count
* sizeof(*dma
->buflist
),
903 (dma
->buf_count
+ entry
->buf_count
)
904 * sizeof(*dma
->buflist
), DRM_MEM_BUFS
);
906 /* Free the entry because it isn't valid */
907 drm_cleanup_buf_error(dev
, entry
);
908 drm_free(temp_pagelist
,
909 (dma
->page_count
+ (count
<< page_order
))
910 * sizeof(*dma
->pagelist
), DRM_MEM_PAGES
);
911 mutex_unlock(&dev
->struct_mutex
);
912 atomic_dec(&dev
->buf_alloc
);
915 dma
->buflist
= temp_buflist
;
917 for (i
= 0; i
< entry
->buf_count
; i
++) {
918 dma
->buflist
[i
+ dma
->buf_count
] = &entry
->buflist
[i
];
921 /* No allocations failed, so now we can replace the orginal pagelist
924 if (dma
->page_count
) {
925 drm_free(dma
->pagelist
,
926 dma
->page_count
* sizeof(*dma
->pagelist
),
929 dma
->pagelist
= temp_pagelist
;
931 dma
->buf_count
+= entry
->buf_count
;
932 dma
->seg_count
+= entry
->seg_count
;
933 dma
->page_count
+= entry
->seg_count
<< page_order
;
934 dma
->byte_count
+= PAGE_SIZE
* (entry
->seg_count
<< page_order
);
936 mutex_unlock(&dev
->struct_mutex
);
938 request
->count
= entry
->buf_count
;
939 request
->size
= size
;
941 if (request
->flags
& _DRM_PCI_BUFFER_RO
)
942 dma
->flags
= _DRM_DMA_USE_PCI_RO
;
944 atomic_dec(&dev
->buf_alloc
);
948 EXPORT_SYMBOL(drm_addbufs_pci
);
950 static int drm_addbufs_sg(struct drm_device
* dev
, struct drm_buf_desc
* request
)
952 struct drm_device_dma
*dma
= dev
->dma
;
953 struct drm_buf_entry
*entry
;
955 unsigned long offset
;
956 unsigned long agp_offset
;
965 struct drm_buf
**temp_buflist
;
967 if (!drm_core_check_feature(dev
, DRIVER_SG
))
973 if (!capable(CAP_SYS_ADMIN
))
976 count
= request
->count
;
977 order
= drm_order(request
->size
);
980 alignment
= (request
->flags
& _DRM_PAGE_ALIGN
)
981 ? PAGE_ALIGN(size
) : size
;
982 page_order
= order
- PAGE_SHIFT
> 0 ? order
- PAGE_SHIFT
: 0;
983 total
= PAGE_SIZE
<< page_order
;
986 agp_offset
= request
->agp_start
;
988 DRM_DEBUG("count: %d\n", count
);
989 DRM_DEBUG("order: %d\n", order
);
990 DRM_DEBUG("size: %d\n", size
);
991 DRM_DEBUG("agp_offset: %lu\n", agp_offset
);
992 DRM_DEBUG("alignment: %d\n", alignment
);
993 DRM_DEBUG("page_order: %d\n", page_order
);
994 DRM_DEBUG("total: %d\n", total
);
996 if (order
< DRM_MIN_ORDER
|| order
> DRM_MAX_ORDER
)
998 if (dev
->queue_count
)
999 return -EBUSY
; /* Not while in use */
1001 spin_lock(&dev
->count_lock
);
1003 spin_unlock(&dev
->count_lock
);
1006 atomic_inc(&dev
->buf_alloc
);
1007 spin_unlock(&dev
->count_lock
);
1009 mutex_lock(&dev
->struct_mutex
);
1010 entry
= &dma
->bufs
[order
];
1011 if (entry
->buf_count
) {
1012 mutex_unlock(&dev
->struct_mutex
);
1013 atomic_dec(&dev
->buf_alloc
);
1014 return -ENOMEM
; /* May only call once for each order */
1017 if (count
< 0 || count
> 4096) {
1018 mutex_unlock(&dev
->struct_mutex
);
1019 atomic_dec(&dev
->buf_alloc
);
1023 entry
->buflist
= drm_alloc(count
* sizeof(*entry
->buflist
),
1025 if (!entry
->buflist
) {
1026 mutex_unlock(&dev
->struct_mutex
);
1027 atomic_dec(&dev
->buf_alloc
);
1030 memset(entry
->buflist
, 0, count
* sizeof(*entry
->buflist
));
1032 entry
->buf_size
= size
;
1033 entry
->page_order
= page_order
;
1037 while (entry
->buf_count
< count
) {
1038 buf
= &entry
->buflist
[entry
->buf_count
];
1039 buf
->idx
= dma
->buf_count
+ entry
->buf_count
;
1040 buf
->total
= alignment
;
1044 buf
->offset
= (dma
->byte_count
+ offset
);
1045 buf
->bus_address
= agp_offset
+ offset
;
1046 buf
->address
= (void *)(agp_offset
+ offset
1047 + (unsigned long)dev
->sg
->virtual);
1051 init_waitqueue_head(&buf
->dma_wait
);
1054 buf
->dev_priv_size
= dev
->driver
->dev_priv_size
;
1055 buf
->dev_private
= drm_alloc(buf
->dev_priv_size
, DRM_MEM_BUFS
);
1056 if (!buf
->dev_private
) {
1057 /* Set count correctly so we free the proper amount. */
1058 entry
->buf_count
= count
;
1059 drm_cleanup_buf_error(dev
, entry
);
1060 mutex_unlock(&dev
->struct_mutex
);
1061 atomic_dec(&dev
->buf_alloc
);
1065 memset(buf
->dev_private
, 0, buf
->dev_priv_size
);
1067 DRM_DEBUG("buffer %d @ %p\n", entry
->buf_count
, buf
->address
);
1069 offset
+= alignment
;
1071 byte_count
+= PAGE_SIZE
<< page_order
;
1074 DRM_DEBUG("byte_count: %d\n", byte_count
);
1076 temp_buflist
= drm_realloc(dma
->buflist
,
1077 dma
->buf_count
* sizeof(*dma
->buflist
),
1078 (dma
->buf_count
+ entry
->buf_count
)
1079 * sizeof(*dma
->buflist
), DRM_MEM_BUFS
);
1080 if (!temp_buflist
) {
1081 /* Free the entry because it isn't valid */
1082 drm_cleanup_buf_error(dev
, entry
);
1083 mutex_unlock(&dev
->struct_mutex
);
1084 atomic_dec(&dev
->buf_alloc
);
1087 dma
->buflist
= temp_buflist
;
1089 for (i
= 0; i
< entry
->buf_count
; i
++) {
1090 dma
->buflist
[i
+ dma
->buf_count
] = &entry
->buflist
[i
];
1093 dma
->buf_count
+= entry
->buf_count
;
1094 dma
->seg_count
+= entry
->seg_count
;
1095 dma
->page_count
+= byte_count
>> PAGE_SHIFT
;
1096 dma
->byte_count
+= byte_count
;
1098 DRM_DEBUG("dma->buf_count : %d\n", dma
->buf_count
);
1099 DRM_DEBUG("entry->buf_count : %d\n", entry
->buf_count
);
1101 mutex_unlock(&dev
->struct_mutex
);
1103 request
->count
= entry
->buf_count
;
1104 request
->size
= size
;
1106 dma
->flags
= _DRM_DMA_USE_SG
;
1108 atomic_dec(&dev
->buf_alloc
);
1112 static int drm_addbufs_fb(struct drm_device
* dev
, struct drm_buf_desc
* request
)
1114 struct drm_device_dma
*dma
= dev
->dma
;
1115 struct drm_buf_entry
*entry
;
1116 struct drm_buf
*buf
;
1117 unsigned long offset
;
1118 unsigned long agp_offset
;
1127 struct drm_buf
**temp_buflist
;
1129 if (!drm_core_check_feature(dev
, DRIVER_FB_DMA
))
1135 if (!capable(CAP_SYS_ADMIN
))
1138 count
= request
->count
;
1139 order
= drm_order(request
->size
);
1142 alignment
= (request
->flags
& _DRM_PAGE_ALIGN
)
1143 ? PAGE_ALIGN(size
) : size
;
1144 page_order
= order
- PAGE_SHIFT
> 0 ? order
- PAGE_SHIFT
: 0;
1145 total
= PAGE_SIZE
<< page_order
;
1148 agp_offset
= request
->agp_start
;
1150 DRM_DEBUG("count: %d\n", count
);
1151 DRM_DEBUG("order: %d\n", order
);
1152 DRM_DEBUG("size: %d\n", size
);
1153 DRM_DEBUG("agp_offset: %lu\n", agp_offset
);
1154 DRM_DEBUG("alignment: %d\n", alignment
);
1155 DRM_DEBUG("page_order: %d\n", page_order
);
1156 DRM_DEBUG("total: %d\n", total
);
1158 if (order
< DRM_MIN_ORDER
|| order
> DRM_MAX_ORDER
)
1160 if (dev
->queue_count
)
1161 return -EBUSY
; /* Not while in use */
1163 spin_lock(&dev
->count_lock
);
1165 spin_unlock(&dev
->count_lock
);
1168 atomic_inc(&dev
->buf_alloc
);
1169 spin_unlock(&dev
->count_lock
);
1171 mutex_lock(&dev
->struct_mutex
);
1172 entry
= &dma
->bufs
[order
];
1173 if (entry
->buf_count
) {
1174 mutex_unlock(&dev
->struct_mutex
);
1175 atomic_dec(&dev
->buf_alloc
);
1176 return -ENOMEM
; /* May only call once for each order */
1179 if (count
< 0 || count
> 4096) {
1180 mutex_unlock(&dev
->struct_mutex
);
1181 atomic_dec(&dev
->buf_alloc
);
1185 entry
->buflist
= drm_alloc(count
* sizeof(*entry
->buflist
),
1187 if (!entry
->buflist
) {
1188 mutex_unlock(&dev
->struct_mutex
);
1189 atomic_dec(&dev
->buf_alloc
);
1192 memset(entry
->buflist
, 0, count
* sizeof(*entry
->buflist
));
1194 entry
->buf_size
= size
;
1195 entry
->page_order
= page_order
;
1199 while (entry
->buf_count
< count
) {
1200 buf
= &entry
->buflist
[entry
->buf_count
];
1201 buf
->idx
= dma
->buf_count
+ entry
->buf_count
;
1202 buf
->total
= alignment
;
1206 buf
->offset
= (dma
->byte_count
+ offset
);
1207 buf
->bus_address
= agp_offset
+ offset
;
1208 buf
->address
= (void *)(agp_offset
+ offset
);
1212 init_waitqueue_head(&buf
->dma_wait
);
1215 buf
->dev_priv_size
= dev
->driver
->dev_priv_size
;
1216 buf
->dev_private
= drm_alloc(buf
->dev_priv_size
, DRM_MEM_BUFS
);
1217 if (!buf
->dev_private
) {
1218 /* Set count correctly so we free the proper amount. */
1219 entry
->buf_count
= count
;
1220 drm_cleanup_buf_error(dev
, entry
);
1221 mutex_unlock(&dev
->struct_mutex
);
1222 atomic_dec(&dev
->buf_alloc
);
1225 memset(buf
->dev_private
, 0, buf
->dev_priv_size
);
1227 DRM_DEBUG("buffer %d @ %p\n", entry
->buf_count
, buf
->address
);
1229 offset
+= alignment
;
1231 byte_count
+= PAGE_SIZE
<< page_order
;
1234 DRM_DEBUG("byte_count: %d\n", byte_count
);
1236 temp_buflist
= drm_realloc(dma
->buflist
,
1237 dma
->buf_count
* sizeof(*dma
->buflist
),
1238 (dma
->buf_count
+ entry
->buf_count
)
1239 * sizeof(*dma
->buflist
), DRM_MEM_BUFS
);
1240 if (!temp_buflist
) {
1241 /* Free the entry because it isn't valid */
1242 drm_cleanup_buf_error(dev
, entry
);
1243 mutex_unlock(&dev
->struct_mutex
);
1244 atomic_dec(&dev
->buf_alloc
);
1247 dma
->buflist
= temp_buflist
;
1249 for (i
= 0; i
< entry
->buf_count
; i
++) {
1250 dma
->buflist
[i
+ dma
->buf_count
] = &entry
->buflist
[i
];
1253 dma
->buf_count
+= entry
->buf_count
;
1254 dma
->seg_count
+= entry
->seg_count
;
1255 dma
->page_count
+= byte_count
>> PAGE_SHIFT
;
1256 dma
->byte_count
+= byte_count
;
1258 DRM_DEBUG("dma->buf_count : %d\n", dma
->buf_count
);
1259 DRM_DEBUG("entry->buf_count : %d\n", entry
->buf_count
);
1261 mutex_unlock(&dev
->struct_mutex
);
1263 request
->count
= entry
->buf_count
;
1264 request
->size
= size
;
1266 dma
->flags
= _DRM_DMA_USE_FB
;
1268 atomic_dec(&dev
->buf_alloc
);
1274 * Add buffers for DMA transfers (ioctl).
1276 * \param inode device inode.
1277 * \param filp file pointer.
1278 * \param cmd command.
1279 * \param arg pointer to a struct drm_buf_desc request.
1280 * \return zero on success or a negative number on failure.
1282 * According with the memory type specified in drm_buf_desc::flags and the
1283 * build options, it dispatches the call either to addbufs_agp(),
1284 * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent
1285 * PCI memory respectively.
1287 int drm_addbufs(struct inode
*inode
, struct file
*filp
,
1288 unsigned int cmd
, unsigned long arg
)
1290 struct drm_buf_desc request
;
1291 struct drm_file
*priv
= filp
->private_data
;
1292 struct drm_device
*dev
= priv
->head
->dev
;
1295 if (!drm_core_check_feature(dev
, DRIVER_HAVE_DMA
))
1298 if (copy_from_user(&request
, (struct drm_buf_desc __user
*) arg
,
1303 if (request
.flags
& _DRM_AGP_BUFFER
)
1304 ret
= drm_addbufs_agp(dev
, &request
);
1307 if (request
.flags
& _DRM_SG_BUFFER
)
1308 ret
= drm_addbufs_sg(dev
, &request
);
1309 else if (request
.flags
& _DRM_FB_BUFFER
)
1310 ret
= drm_addbufs_fb(dev
, &request
);
1312 ret
= drm_addbufs_pci(dev
, &request
);
1315 if (copy_to_user((void __user
*)arg
, &request
, sizeof(request
))) {
1323 * Get information about the buffer mappings.
1325 * This was originally mean for debugging purposes, or by a sophisticated
1326 * client library to determine how best to use the available buffers (e.g.,
1327 * large buffers can be used for image transfer).
1329 * \param inode device inode.
1330 * \param filp file pointer.
1331 * \param cmd command.
1332 * \param arg pointer to a drm_buf_info structure.
1333 * \return zero on success or a negative number on failure.
1335 * Increments drm_device::buf_use while holding the drm_device::count_lock
1336 * lock, preventing of allocating more buffers after this call. Information
1337 * about each requested buffer is then copied into user space.
1339 int drm_infobufs(struct inode
*inode
, struct file
*filp
,
1340 unsigned int cmd
, unsigned long arg
)
1342 struct drm_file
*priv
= filp
->private_data
;
1343 struct drm_device
*dev
= priv
->head
->dev
;
1344 struct drm_device_dma
*dma
= dev
->dma
;
1345 struct drm_buf_info request
;
1346 struct drm_buf_info __user
*argp
= (void __user
*)arg
;
1350 if (!drm_core_check_feature(dev
, DRIVER_HAVE_DMA
))
1356 spin_lock(&dev
->count_lock
);
1357 if (atomic_read(&dev
->buf_alloc
)) {
1358 spin_unlock(&dev
->count_lock
);
1361 ++dev
->buf_use
; /* Can't allocate more after this call */
1362 spin_unlock(&dev
->count_lock
);
1364 if (copy_from_user(&request
, argp
, sizeof(request
)))
1367 for (i
= 0, count
= 0; i
< DRM_MAX_ORDER
+ 1; i
++) {
1368 if (dma
->bufs
[i
].buf_count
)
1372 DRM_DEBUG("count = %d\n", count
);
1374 if (request
.count
>= count
) {
1375 for (i
= 0, count
= 0; i
< DRM_MAX_ORDER
+ 1; i
++) {
1376 if (dma
->bufs
[i
].buf_count
) {
1377 struct drm_buf_desc __user
*to
=
1378 &request
.list
[count
];
1379 struct drm_buf_entry
*from
= &dma
->bufs
[i
];
1380 struct drm_freelist
*list
= &dma
->bufs
[i
].freelist
;
1381 if (copy_to_user(&to
->count
,
1383 sizeof(from
->buf_count
)) ||
1384 copy_to_user(&to
->size
,
1386 sizeof(from
->buf_size
)) ||
1387 copy_to_user(&to
->low_mark
,
1389 sizeof(list
->low_mark
)) ||
1390 copy_to_user(&to
->high_mark
,
1392 sizeof(list
->high_mark
)))
1395 DRM_DEBUG("%d %d %d %d %d\n",
1397 dma
->bufs
[i
].buf_count
,
1398 dma
->bufs
[i
].buf_size
,
1399 dma
->bufs
[i
].freelist
.low_mark
,
1400 dma
->bufs
[i
].freelist
.high_mark
);
1405 request
.count
= count
;
1407 if (copy_to_user(argp
, &request
, sizeof(request
)))
1414 * Specifies a low and high water mark for buffer allocation
1416 * \param inode device inode.
1417 * \param filp file pointer.
1418 * \param cmd command.
1419 * \param arg a pointer to a drm_buf_desc structure.
1420 * \return zero on success or a negative number on failure.
1422 * Verifies that the size order is bounded between the admissible orders and
1423 * updates the respective drm_device_dma::bufs entry low and high water mark.
1425 * \note This ioctl is deprecated and mostly never used.
1427 int drm_markbufs(struct inode
*inode
, struct file
*filp
,
1428 unsigned int cmd
, unsigned long arg
)
1430 struct drm_file
*priv
= filp
->private_data
;
1431 struct drm_device
*dev
= priv
->head
->dev
;
1432 struct drm_device_dma
*dma
= dev
->dma
;
1433 struct drm_buf_desc request
;
1435 struct drm_buf_entry
*entry
;
1437 if (!drm_core_check_feature(dev
, DRIVER_HAVE_DMA
))
1443 if (copy_from_user(&request
,
1444 (struct drm_buf_desc __user
*) arg
, sizeof(request
)))
1447 DRM_DEBUG("%d, %d, %d\n",
1448 request
.size
, request
.low_mark
, request
.high_mark
);
1449 order
= drm_order(request
.size
);
1450 if (order
< DRM_MIN_ORDER
|| order
> DRM_MAX_ORDER
)
1452 entry
= &dma
->bufs
[order
];
1454 if (request
.low_mark
< 0 || request
.low_mark
> entry
->buf_count
)
1456 if (request
.high_mark
< 0 || request
.high_mark
> entry
->buf_count
)
1459 entry
->freelist
.low_mark
= request
.low_mark
;
1460 entry
->freelist
.high_mark
= request
.high_mark
;
1466 * Unreserve the buffers in list, previously reserved using drmDMA.
1468 * \param inode device inode.
1469 * \param filp file pointer.
1470 * \param cmd command.
1471 * \param arg pointer to a drm_buf_free structure.
1472 * \return zero on success or a negative number on failure.
1474 * Calls free_buffer() for each used buffer.
1475 * This function is primarily used for debugging.
1477 int drm_freebufs(struct inode
*inode
, struct file
*filp
,
1478 unsigned int cmd
, unsigned long arg
)
1480 struct drm_file
*priv
= filp
->private_data
;
1481 struct drm_device
*dev
= priv
->head
->dev
;
1482 struct drm_device_dma
*dma
= dev
->dma
;
1483 struct drm_buf_free request
;
1486 struct drm_buf
*buf
;
1488 if (!drm_core_check_feature(dev
, DRIVER_HAVE_DMA
))
1494 if (copy_from_user(&request
,
1495 (struct drm_buf_free __user
*) arg
, sizeof(request
)))
1498 DRM_DEBUG("%d\n", request
.count
);
1499 for (i
= 0; i
< request
.count
; i
++) {
1500 if (copy_from_user(&idx
, &request
.list
[i
], sizeof(idx
)))
1502 if (idx
< 0 || idx
>= dma
->buf_count
) {
1503 DRM_ERROR("Index %d (of %d max)\n",
1504 idx
, dma
->buf_count
- 1);
1507 buf
= dma
->buflist
[idx
];
1508 if (buf
->filp
!= filp
) {
1509 DRM_ERROR("Process %d freeing buffer not owned\n",
1513 drm_free_buffer(dev
, buf
);
1520 * Maps all of the DMA buffers into client-virtual space (ioctl).
1522 * \param inode device inode.
1523 * \param filp file pointer.
1524 * \param cmd command.
1525 * \param arg pointer to a drm_buf_map structure.
1526 * \return zero on success or a negative number on failure.
1528 * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information
1529 * about each buffer into user space. For PCI buffers, it calls do_mmap() with
1530 * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls
1533 int drm_mapbufs(struct inode
*inode
, struct file
*filp
,
1534 unsigned int cmd
, unsigned long arg
)
1536 struct drm_file
*priv
= filp
->private_data
;
1537 struct drm_device
*dev
= priv
->head
->dev
;
1538 struct drm_device_dma
*dma
= dev
->dma
;
1539 struct drm_buf_map __user
*argp
= (void __user
*)arg
;
1542 unsigned long virtual;
1543 unsigned long address
;
1544 struct drm_buf_map request
;
1547 if (!drm_core_check_feature(dev
, DRIVER_HAVE_DMA
))
1553 spin_lock(&dev
->count_lock
);
1554 if (atomic_read(&dev
->buf_alloc
)) {
1555 spin_unlock(&dev
->count_lock
);
1558 dev
->buf_use
++; /* Can't allocate more after this call */
1559 spin_unlock(&dev
->count_lock
);
1561 if (copy_from_user(&request
, argp
, sizeof(request
)))
1564 if (request
.count
>= dma
->buf_count
) {
1565 if ((drm_core_has_AGP(dev
) && (dma
->flags
& _DRM_DMA_USE_AGP
))
1566 || (drm_core_check_feature(dev
, DRIVER_SG
)
1567 && (dma
->flags
& _DRM_DMA_USE_SG
))
1568 || (drm_core_check_feature(dev
, DRIVER_FB_DMA
)
1569 && (dma
->flags
& _DRM_DMA_USE_FB
))) {
1570 struct drm_map
*map
= dev
->agp_buffer_map
;
1571 unsigned long token
= dev
->agp_buffer_token
;
1578 down_write(¤t
->mm
->mmap_sem
);
1579 virtual = do_mmap(filp
, 0, map
->size
,
1580 PROT_READ
| PROT_WRITE
,
1582 up_write(¤t
->mm
->mmap_sem
);
1584 down_write(¤t
->mm
->mmap_sem
);
1585 virtual = do_mmap(filp
, 0, dma
->byte_count
,
1586 PROT_READ
| PROT_WRITE
,
1588 up_write(¤t
->mm
->mmap_sem
);
1590 if (virtual > -1024UL) {
1592 retcode
= (signed long)virtual;
1595 request
.virtual = (void __user
*)virtual;
1597 for (i
= 0; i
< dma
->buf_count
; i
++) {
1598 if (copy_to_user(&request
.list
[i
].idx
,
1599 &dma
->buflist
[i
]->idx
,
1600 sizeof(request
.list
[0].idx
))) {
1604 if (copy_to_user(&request
.list
[i
].total
,
1605 &dma
->buflist
[i
]->total
,
1606 sizeof(request
.list
[0].total
))) {
1610 if (copy_to_user(&request
.list
[i
].used
,
1611 &zero
, sizeof(zero
))) {
1615 address
= virtual + dma
->buflist
[i
]->offset
; /* *** */
1616 if (copy_to_user(&request
.list
[i
].address
,
1617 &address
, sizeof(address
))) {
1624 request
.count
= dma
->buf_count
;
1625 DRM_DEBUG("%d buffers, retcode = %d\n", request
.count
, retcode
);
1627 if (copy_to_user(argp
, &request
, sizeof(request
)))
1634 * Compute size order. Returns the exponent of the smaller power of two which
1635 * is greater or equal to given number.
1640 * \todo Can be made faster.
1642 int drm_order(unsigned long size
)
1647 for (order
= 0, tmp
= size
>> 1; tmp
; tmp
>>= 1, order
++) ;
1649 if (size
& (size
- 1))
1654 EXPORT_SYMBOL(drm_order
);