1 /**************************************************************************
3 * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 #include "vmwgfx_drv.h"
29 #include <drm/vmwgfx_drm.h>
30 #include <drm/ttm/ttm_object.h>
31 #include <drm/ttm/ttm_placement.h>
33 #include "vmwgfx_resource_priv.h"
35 #define VMW_RES_EVICT_ERR_COUNT 10
37 struct vmw_user_dma_buffer
{
38 struct ttm_prime_object prime
;
39 struct vmw_dma_buffer dma
;
42 struct vmw_bo_user_rep
{
48 struct vmw_resource res
;
52 struct vmw_user_stream
{
53 struct ttm_base_object base
;
54 struct vmw_stream stream
;
58 static uint64_t vmw_user_stream_size
;
60 static const struct vmw_res_func vmw_stream_func
= {
61 .res_type
= vmw_res_stream
,
62 .needs_backup
= false,
64 .type_name
= "video streams",
65 .backup_placement
= NULL
,
72 static inline struct vmw_dma_buffer
*
73 vmw_dma_buffer(struct ttm_buffer_object
*bo
)
75 return container_of(bo
, struct vmw_dma_buffer
, base
);
78 static inline struct vmw_user_dma_buffer
*
79 vmw_user_dma_buffer(struct ttm_buffer_object
*bo
)
81 struct vmw_dma_buffer
*vmw_bo
= vmw_dma_buffer(bo
);
82 return container_of(vmw_bo
, struct vmw_user_dma_buffer
, dma
);
85 struct vmw_resource
*vmw_resource_reference(struct vmw_resource
*res
)
93 * vmw_resource_release_id - release a resource id to the id manager.
95 * @res: Pointer to the resource.
97 * Release the resource id to the resource id manager and set it to -1
99 void vmw_resource_release_id(struct vmw_resource
*res
)
101 struct vmw_private
*dev_priv
= res
->dev_priv
;
102 struct idr
*idr
= &dev_priv
->res_idr
[res
->func
->res_type
];
104 write_lock(&dev_priv
->resource_lock
);
106 idr_remove(idr
, res
->id
);
108 write_unlock(&dev_priv
->resource_lock
);
111 static void vmw_resource_release(struct kref
*kref
)
113 struct vmw_resource
*res
=
114 container_of(kref
, struct vmw_resource
, kref
);
115 struct vmw_private
*dev_priv
= res
->dev_priv
;
117 struct idr
*idr
= &dev_priv
->res_idr
[res
->func
->res_type
];
120 list_del_init(&res
->lru_head
);
121 write_unlock(&dev_priv
->resource_lock
);
123 struct ttm_buffer_object
*bo
= &res
->backup
->base
;
125 ttm_bo_reserve(bo
, false, false, false, 0);
126 if (!list_empty(&res
->mob_head
) &&
127 res
->func
->unbind
!= NULL
) {
128 struct ttm_validate_buffer val_buf
;
131 res
->func
->unbind(res
, false, &val_buf
);
133 res
->backup_dirty
= false;
134 list_del_init(&res
->mob_head
);
135 ttm_bo_unreserve(bo
);
136 vmw_dmabuf_unreference(&res
->backup
);
139 if (likely(res
->hw_destroy
!= NULL
))
140 res
->hw_destroy(res
);
143 if (res
->res_free
!= NULL
)
148 write_lock(&dev_priv
->resource_lock
);
154 void vmw_resource_unreference(struct vmw_resource
**p_res
)
156 struct vmw_resource
*res
= *p_res
;
157 struct vmw_private
*dev_priv
= res
->dev_priv
;
160 write_lock(&dev_priv
->resource_lock
);
161 kref_put(&res
->kref
, vmw_resource_release
);
162 write_unlock(&dev_priv
->resource_lock
);
167 * vmw_resource_alloc_id - release a resource id to the id manager.
169 * @res: Pointer to the resource.
171 * Allocate the lowest free resource from the resource manager, and set
172 * @res->id to that id. Returns 0 on success and -ENOMEM on failure.
174 int vmw_resource_alloc_id(struct vmw_resource
*res
)
176 struct vmw_private
*dev_priv
= res
->dev_priv
;
178 struct idr
*idr
= &dev_priv
->res_idr
[res
->func
->res_type
];
180 BUG_ON(res
->id
!= -1);
182 idr_preload(GFP_KERNEL
);
183 write_lock(&dev_priv
->resource_lock
);
185 ret
= idr_alloc(idr
, res
, 1, 0, GFP_NOWAIT
);
189 write_unlock(&dev_priv
->resource_lock
);
191 return ret
< 0 ? ret
: 0;
195 * vmw_resource_init - initialize a struct vmw_resource
197 * @dev_priv: Pointer to a device private struct.
198 * @res: The struct vmw_resource to initialize.
199 * @obj_type: Resource object type.
200 * @delay_id: Boolean whether to defer device id allocation until
201 * the first validation.
202 * @res_free: Resource destructor.
203 * @func: Resource function table.
205 int vmw_resource_init(struct vmw_private
*dev_priv
, struct vmw_resource
*res
,
207 void (*res_free
) (struct vmw_resource
*res
),
208 const struct vmw_res_func
*func
)
210 kref_init(&res
->kref
);
211 res
->hw_destroy
= NULL
;
212 res
->res_free
= res_free
;
214 res
->dev_priv
= dev_priv
;
216 INIT_LIST_HEAD(&res
->lru_head
);
217 INIT_LIST_HEAD(&res
->mob_head
);
220 res
->backup_offset
= 0;
221 res
->backup_dirty
= false;
222 res
->res_dirty
= false;
226 return vmw_resource_alloc_id(res
);
230 * vmw_resource_activate
232 * @res: Pointer to the newly created resource
233 * @hw_destroy: Destroy function. NULL if none.
235 * Activate a resource after the hardware has been made aware of it.
236 * Set tye destroy function to @destroy. Typically this frees the
237 * resource and destroys the hardware resources associated with it.
238 * Activate basically means that the function vmw_resource_lookup will
241 void vmw_resource_activate(struct vmw_resource
*res
,
242 void (*hw_destroy
) (struct vmw_resource
*))
244 struct vmw_private
*dev_priv
= res
->dev_priv
;
246 write_lock(&dev_priv
->resource_lock
);
248 res
->hw_destroy
= hw_destroy
;
249 write_unlock(&dev_priv
->resource_lock
);
252 struct vmw_resource
*vmw_resource_lookup(struct vmw_private
*dev_priv
,
253 struct idr
*idr
, int id
)
255 struct vmw_resource
*res
;
257 read_lock(&dev_priv
->resource_lock
);
258 res
= idr_find(idr
, id
);
259 if (res
&& res
->avail
)
260 kref_get(&res
->kref
);
263 read_unlock(&dev_priv
->resource_lock
);
265 if (unlikely(res
== NULL
))
272 * vmw_user_resource_lookup_handle - lookup a struct resource from a
273 * TTM user-space handle and perform basic type checks
275 * @dev_priv: Pointer to a device private struct
276 * @tfile: Pointer to a struct ttm_object_file identifying the caller
277 * @handle: The TTM user-space handle
278 * @converter: Pointer to an object describing the resource type
279 * @p_res: On successful return the location pointed to will contain
280 * a pointer to a refcounted struct vmw_resource.
282 * If the handle can't be found or is associated with an incorrect resource
283 * type, -EINVAL will be returned.
285 int vmw_user_resource_lookup_handle(struct vmw_private
*dev_priv
,
286 struct ttm_object_file
*tfile
,
288 const struct vmw_user_resource_conv
290 struct vmw_resource
**p_res
)
292 struct ttm_base_object
*base
;
293 struct vmw_resource
*res
;
296 base
= ttm_base_object_lookup(tfile
, handle
);
297 if (unlikely(base
== NULL
))
300 if (unlikely(ttm_base_object_type(base
) != converter
->object_type
))
301 goto out_bad_resource
;
303 res
= converter
->base_obj_to_res(base
);
305 read_lock(&dev_priv
->resource_lock
);
306 if (!res
->avail
|| res
->res_free
!= converter
->res_free
) {
307 read_unlock(&dev_priv
->resource_lock
);
308 goto out_bad_resource
;
311 kref_get(&res
->kref
);
312 read_unlock(&dev_priv
->resource_lock
);
318 ttm_base_object_unref(&base
);
324 * Helper function that looks either a surface or dmabuf.
326 * The pointer this pointed at by out_surf and out_buf needs to be null.
328 int vmw_user_lookup_handle(struct vmw_private
*dev_priv
,
329 struct ttm_object_file
*tfile
,
331 struct vmw_surface
**out_surf
,
332 struct vmw_dma_buffer
**out_buf
)
334 struct vmw_resource
*res
;
337 BUG_ON(*out_surf
|| *out_buf
);
339 ret
= vmw_user_resource_lookup_handle(dev_priv
, tfile
, handle
,
340 user_surface_converter
,
343 *out_surf
= vmw_res_to_srf(res
);
348 ret
= vmw_user_dmabuf_lookup(tfile
, handle
, out_buf
);
355 void vmw_dmabuf_bo_free(struct ttm_buffer_object
*bo
)
357 struct vmw_dma_buffer
*vmw_bo
= vmw_dma_buffer(bo
);
362 int vmw_dmabuf_init(struct vmw_private
*dev_priv
,
363 struct vmw_dma_buffer
*vmw_bo
,
364 size_t size
, struct ttm_placement
*placement
,
366 void (*bo_free
) (struct ttm_buffer_object
*bo
))
368 struct ttm_bo_device
*bdev
= &dev_priv
->bdev
;
374 acc_size
= ttm_bo_acc_size(bdev
, size
, sizeof(struct vmw_dma_buffer
));
375 memset(vmw_bo
, 0, sizeof(*vmw_bo
));
377 INIT_LIST_HEAD(&vmw_bo
->res_list
);
379 ret
= ttm_bo_init(bdev
, &vmw_bo
->base
, size
,
380 ttm_bo_type_device
, placement
,
382 NULL
, acc_size
, NULL
, bo_free
);
386 static void vmw_user_dmabuf_destroy(struct ttm_buffer_object
*bo
)
388 struct vmw_user_dma_buffer
*vmw_user_bo
= vmw_user_dma_buffer(bo
);
390 ttm_prime_object_kfree(vmw_user_bo
, prime
);
393 static void vmw_user_dmabuf_release(struct ttm_base_object
**p_base
)
395 struct vmw_user_dma_buffer
*vmw_user_bo
;
396 struct ttm_base_object
*base
= *p_base
;
397 struct ttm_buffer_object
*bo
;
401 if (unlikely(base
== NULL
))
404 vmw_user_bo
= container_of(base
, struct vmw_user_dma_buffer
,
406 bo
= &vmw_user_bo
->dma
.base
;
411 * vmw_user_dmabuf_alloc - Allocate a user dma buffer
413 * @dev_priv: Pointer to a struct device private.
414 * @tfile: Pointer to a struct ttm_object_file on which to register the user
416 * @size: Size of the dma buffer.
417 * @shareable: Boolean whether the buffer is shareable with other open files.
418 * @handle: Pointer to where the handle value should be assigned.
419 * @p_dma_buf: Pointer to where the refcounted struct vmw_dma_buffer pointer
420 * should be assigned.
422 int vmw_user_dmabuf_alloc(struct vmw_private
*dev_priv
,
423 struct ttm_object_file
*tfile
,
427 struct vmw_dma_buffer
**p_dma_buf
)
429 struct vmw_user_dma_buffer
*user_bo
;
430 struct ttm_buffer_object
*tmp
;
433 user_bo
= kzalloc(sizeof(*user_bo
), GFP_KERNEL
);
434 if (unlikely(user_bo
== NULL
)) {
435 DRM_ERROR("Failed to allocate a buffer.\n");
439 ret
= vmw_dmabuf_init(dev_priv
, &user_bo
->dma
, size
,
440 &vmw_vram_sys_placement
, true,
441 &vmw_user_dmabuf_destroy
);
442 if (unlikely(ret
!= 0))
445 tmp
= ttm_bo_reference(&user_bo
->dma
.base
);
446 ret
= ttm_prime_object_init(tfile
,
451 &vmw_user_dmabuf_release
, NULL
);
452 if (unlikely(ret
!= 0)) {
454 goto out_no_base_object
;
457 *p_dma_buf
= &user_bo
->dma
;
458 *handle
= user_bo
->prime
.base
.hash
.key
;
465 * vmw_user_dmabuf_verify_access - verify access permissions on this
468 * @bo: Pointer to the buffer object being accessed
469 * @tfile: Identifying the caller.
471 int vmw_user_dmabuf_verify_access(struct ttm_buffer_object
*bo
,
472 struct ttm_object_file
*tfile
)
474 struct vmw_user_dma_buffer
*vmw_user_bo
;
476 if (unlikely(bo
->destroy
!= vmw_user_dmabuf_destroy
))
479 vmw_user_bo
= vmw_user_dma_buffer(bo
);
480 return (vmw_user_bo
->prime
.base
.tfile
== tfile
||
481 vmw_user_bo
->prime
.base
.shareable
) ? 0 : -EPERM
;
484 int vmw_dmabuf_alloc_ioctl(struct drm_device
*dev
, void *data
,
485 struct drm_file
*file_priv
)
487 struct vmw_private
*dev_priv
= vmw_priv(dev
);
488 union drm_vmw_alloc_dmabuf_arg
*arg
=
489 (union drm_vmw_alloc_dmabuf_arg
*)data
;
490 struct drm_vmw_alloc_dmabuf_req
*req
= &arg
->req
;
491 struct drm_vmw_dmabuf_rep
*rep
= &arg
->rep
;
492 struct vmw_dma_buffer
*dma_buf
;
494 struct vmw_master
*vmaster
= vmw_master(file_priv
->master
);
497 ret
= ttm_read_lock(&vmaster
->lock
, true);
498 if (unlikely(ret
!= 0))
501 ret
= vmw_user_dmabuf_alloc(dev_priv
, vmw_fpriv(file_priv
)->tfile
,
502 req
->size
, false, &handle
, &dma_buf
);
503 if (unlikely(ret
!= 0))
506 rep
->handle
= handle
;
507 rep
->map_handle
= drm_vma_node_offset_addr(&dma_buf
->base
.vma_node
);
508 rep
->cur_gmr_id
= handle
;
509 rep
->cur_gmr_offset
= 0;
511 vmw_dmabuf_unreference(&dma_buf
);
514 ttm_read_unlock(&vmaster
->lock
);
519 int vmw_dmabuf_unref_ioctl(struct drm_device
*dev
, void *data
,
520 struct drm_file
*file_priv
)
522 struct drm_vmw_unref_dmabuf_arg
*arg
=
523 (struct drm_vmw_unref_dmabuf_arg
*)data
;
525 return ttm_ref_object_base_unref(vmw_fpriv(file_priv
)->tfile
,
530 int vmw_user_dmabuf_lookup(struct ttm_object_file
*tfile
,
531 uint32_t handle
, struct vmw_dma_buffer
**out
)
533 struct vmw_user_dma_buffer
*vmw_user_bo
;
534 struct ttm_base_object
*base
;
536 base
= ttm_base_object_lookup(tfile
, handle
);
537 if (unlikely(base
== NULL
)) {
538 printk(KERN_ERR
"Invalid buffer object handle 0x%08lx.\n",
539 (unsigned long)handle
);
543 if (unlikely(ttm_base_object_type(base
) != ttm_buffer_type
)) {
544 ttm_base_object_unref(&base
);
545 printk(KERN_ERR
"Invalid buffer object handle 0x%08lx.\n",
546 (unsigned long)handle
);
550 vmw_user_bo
= container_of(base
, struct vmw_user_dma_buffer
,
552 (void)ttm_bo_reference(&vmw_user_bo
->dma
.base
);
553 ttm_base_object_unref(&base
);
554 *out
= &vmw_user_bo
->dma
;
559 int vmw_user_dmabuf_reference(struct ttm_object_file
*tfile
,
560 struct vmw_dma_buffer
*dma_buf
)
562 struct vmw_user_dma_buffer
*user_bo
;
564 if (dma_buf
->base
.destroy
!= vmw_user_dmabuf_destroy
)
567 user_bo
= container_of(dma_buf
, struct vmw_user_dma_buffer
, dma
);
568 return ttm_ref_object_add(tfile
, &user_bo
->prime
.base
,
569 TTM_REF_USAGE
, NULL
);
576 static void vmw_stream_destroy(struct vmw_resource
*res
)
578 struct vmw_private
*dev_priv
= res
->dev_priv
;
579 struct vmw_stream
*stream
;
582 DRM_INFO("%s: unref\n", __func__
);
583 stream
= container_of(res
, struct vmw_stream
, res
);
585 ret
= vmw_overlay_unref(dev_priv
, stream
->stream_id
);
589 static int vmw_stream_init(struct vmw_private
*dev_priv
,
590 struct vmw_stream
*stream
,
591 void (*res_free
) (struct vmw_resource
*res
))
593 struct vmw_resource
*res
= &stream
->res
;
596 ret
= vmw_resource_init(dev_priv
, res
, false, res_free
,
599 if (unlikely(ret
!= 0)) {
600 if (res_free
== NULL
)
603 res_free(&stream
->res
);
607 ret
= vmw_overlay_claim(dev_priv
, &stream
->stream_id
);
609 vmw_resource_unreference(&res
);
613 DRM_INFO("%s: claimed\n", __func__
);
615 vmw_resource_activate(&stream
->res
, vmw_stream_destroy
);
619 static void vmw_user_stream_free(struct vmw_resource
*res
)
621 struct vmw_user_stream
*stream
=
622 container_of(res
, struct vmw_user_stream
, stream
.res
);
623 struct vmw_private
*dev_priv
= res
->dev_priv
;
625 ttm_base_object_kfree(stream
, base
);
626 ttm_mem_global_free(vmw_mem_glob(dev_priv
),
627 vmw_user_stream_size
);
631 * This function is called when user space has no more references on the
632 * base object. It releases the base-object's reference on the resource object.
635 static void vmw_user_stream_base_release(struct ttm_base_object
**p_base
)
637 struct ttm_base_object
*base
= *p_base
;
638 struct vmw_user_stream
*stream
=
639 container_of(base
, struct vmw_user_stream
, base
);
640 struct vmw_resource
*res
= &stream
->stream
.res
;
643 vmw_resource_unreference(&res
);
646 int vmw_stream_unref_ioctl(struct drm_device
*dev
, void *data
,
647 struct drm_file
*file_priv
)
649 struct vmw_private
*dev_priv
= vmw_priv(dev
);
650 struct vmw_resource
*res
;
651 struct vmw_user_stream
*stream
;
652 struct drm_vmw_stream_arg
*arg
= (struct drm_vmw_stream_arg
*)data
;
653 struct ttm_object_file
*tfile
= vmw_fpriv(file_priv
)->tfile
;
654 struct idr
*idr
= &dev_priv
->res_idr
[vmw_res_stream
];
658 res
= vmw_resource_lookup(dev_priv
, idr
, arg
->stream_id
);
659 if (unlikely(res
== NULL
))
662 if (res
->res_free
!= &vmw_user_stream_free
) {
667 stream
= container_of(res
, struct vmw_user_stream
, stream
.res
);
668 if (stream
->base
.tfile
!= tfile
) {
673 ttm_ref_object_base_unref(tfile
, stream
->base
.hash
.key
, TTM_REF_USAGE
);
675 vmw_resource_unreference(&res
);
679 int vmw_stream_claim_ioctl(struct drm_device
*dev
, void *data
,
680 struct drm_file
*file_priv
)
682 struct vmw_private
*dev_priv
= vmw_priv(dev
);
683 struct vmw_user_stream
*stream
;
684 struct vmw_resource
*res
;
685 struct vmw_resource
*tmp
;
686 struct drm_vmw_stream_arg
*arg
= (struct drm_vmw_stream_arg
*)data
;
687 struct ttm_object_file
*tfile
= vmw_fpriv(file_priv
)->tfile
;
688 struct vmw_master
*vmaster
= vmw_master(file_priv
->master
);
692 * Approximate idr memory usage with 128 bytes. It will be limited
693 * by maximum number_of streams anyway?
696 if (unlikely(vmw_user_stream_size
== 0))
697 vmw_user_stream_size
= ttm_round_pot(sizeof(*stream
)) + 128;
699 ret
= ttm_read_lock(&vmaster
->lock
, true);
700 if (unlikely(ret
!= 0))
703 ret
= ttm_mem_global_alloc(vmw_mem_glob(dev_priv
),
704 vmw_user_stream_size
,
706 if (unlikely(ret
!= 0)) {
707 if (ret
!= -ERESTARTSYS
)
708 DRM_ERROR("Out of graphics memory for stream"
714 stream
= kmalloc(sizeof(*stream
), GFP_KERNEL
);
715 if (unlikely(stream
== NULL
)) {
716 ttm_mem_global_free(vmw_mem_glob(dev_priv
),
717 vmw_user_stream_size
);
722 res
= &stream
->stream
.res
;
723 stream
->base
.shareable
= false;
724 stream
->base
.tfile
= NULL
;
727 * From here on, the destructor takes over resource freeing.
730 ret
= vmw_stream_init(dev_priv
, &stream
->stream
, vmw_user_stream_free
);
731 if (unlikely(ret
!= 0))
734 tmp
= vmw_resource_reference(res
);
735 ret
= ttm_base_object_init(tfile
, &stream
->base
, false, VMW_RES_STREAM
,
736 &vmw_user_stream_base_release
, NULL
);
738 if (unlikely(ret
!= 0)) {
739 vmw_resource_unreference(&tmp
);
743 arg
->stream_id
= res
->id
;
745 vmw_resource_unreference(&res
);
747 ttm_read_unlock(&vmaster
->lock
);
751 int vmw_user_stream_lookup(struct vmw_private
*dev_priv
,
752 struct ttm_object_file
*tfile
,
753 uint32_t *inout_id
, struct vmw_resource
**out
)
755 struct vmw_user_stream
*stream
;
756 struct vmw_resource
*res
;
759 res
= vmw_resource_lookup(dev_priv
, &dev_priv
->res_idr
[vmw_res_stream
],
761 if (unlikely(res
== NULL
))
764 if (res
->res_free
!= &vmw_user_stream_free
) {
769 stream
= container_of(res
, struct vmw_user_stream
, stream
.res
);
770 if (stream
->base
.tfile
!= tfile
) {
775 *inout_id
= stream
->stream
.stream_id
;
779 vmw_resource_unreference(&res
);
784 int vmw_dumb_create(struct drm_file
*file_priv
,
785 struct drm_device
*dev
,
786 struct drm_mode_create_dumb
*args
)
788 struct vmw_private
*dev_priv
= vmw_priv(dev
);
789 struct vmw_master
*vmaster
= vmw_master(file_priv
->master
);
790 struct vmw_user_dma_buffer
*vmw_user_bo
;
791 struct ttm_buffer_object
*tmp
;
794 args
->pitch
= args
->width
* ((args
->bpp
+ 7) / 8);
795 args
->size
= args
->pitch
* args
->height
;
797 vmw_user_bo
= kzalloc(sizeof(*vmw_user_bo
), GFP_KERNEL
);
798 if (vmw_user_bo
== NULL
)
801 ret
= ttm_read_lock(&vmaster
->lock
, true);
807 ret
= vmw_dmabuf_init(dev_priv
, &vmw_user_bo
->dma
, args
->size
,
808 &vmw_vram_sys_placement
, true,
809 &vmw_user_dmabuf_destroy
);
813 tmp
= ttm_bo_reference(&vmw_user_bo
->dma
.base
);
814 ret
= ttm_prime_object_init(vmw_fpriv(file_priv
)->tfile
,
819 &vmw_user_dmabuf_release
, NULL
);
820 if (unlikely(ret
!= 0))
821 goto out_no_base_object
;
823 args
->handle
= vmw_user_bo
->prime
.base
.hash
.key
;
828 ttm_read_unlock(&vmaster
->lock
);
832 int vmw_dumb_map_offset(struct drm_file
*file_priv
,
833 struct drm_device
*dev
, uint32_t handle
,
836 struct ttm_object_file
*tfile
= vmw_fpriv(file_priv
)->tfile
;
837 struct vmw_dma_buffer
*out_buf
;
840 ret
= vmw_user_dmabuf_lookup(tfile
, handle
, &out_buf
);
844 *offset
= drm_vma_node_offset_addr(&out_buf
->base
.vma_node
);
845 vmw_dmabuf_unreference(&out_buf
);
849 int vmw_dumb_destroy(struct drm_file
*file_priv
,
850 struct drm_device
*dev
,
853 return ttm_ref_object_base_unref(vmw_fpriv(file_priv
)->tfile
,
854 handle
, TTM_REF_USAGE
);
858 * vmw_resource_buf_alloc - Allocate a backup buffer for a resource.
860 * @res: The resource for which to allocate a backup buffer.
861 * @interruptible: Whether any sleeps during allocation should be
862 * performed while interruptible.
864 static int vmw_resource_buf_alloc(struct vmw_resource
*res
,
868 (res
->backup_size
+ PAGE_SIZE
- 1) & PAGE_MASK
;
869 struct vmw_dma_buffer
*backup
;
872 if (likely(res
->backup
)) {
873 BUG_ON(res
->backup
->base
.num_pages
* PAGE_SIZE
< size
);
877 backup
= kzalloc(sizeof(*backup
), GFP_KERNEL
);
878 if (unlikely(backup
== NULL
))
881 ret
= vmw_dmabuf_init(res
->dev_priv
, backup
, res
->backup_size
,
882 res
->func
->backup_placement
,
884 &vmw_dmabuf_bo_free
);
885 if (unlikely(ret
!= 0))
888 res
->backup
= backup
;
895 * vmw_resource_do_validate - Make a resource up-to-date and visible
898 * @res: The resource to make visible to the device.
899 * @val_buf: Information about a buffer possibly
900 * containing backup data if a bind operation is needed.
902 * On hardware resource shortage, this function returns -EBUSY and
903 * should be retried once resources have been freed up.
905 static int vmw_resource_do_validate(struct vmw_resource
*res
,
906 struct ttm_validate_buffer
*val_buf
)
909 const struct vmw_res_func
*func
= res
->func
;
911 if (unlikely(res
->id
== -1)) {
912 ret
= func
->create(res
);
913 if (unlikely(ret
!= 0))
918 ((func
->needs_backup
&& list_empty(&res
->mob_head
) &&
919 val_buf
->bo
!= NULL
) ||
920 (!func
->needs_backup
&& val_buf
->bo
!= NULL
))) {
921 ret
= func
->bind(res
, val_buf
);
922 if (unlikely(ret
!= 0))
923 goto out_bind_failed
;
924 if (func
->needs_backup
)
925 list_add_tail(&res
->mob_head
, &res
->backup
->res_list
);
929 * Only do this on write operations, and move to
930 * vmw_resource_unreserve if it can be called after
931 * backup buffers have been unreserved. Otherwise
934 res
->res_dirty
= true;
945 * vmw_resource_unreserve - Unreserve a resource previously reserved for
946 * command submission.
948 * @res: Pointer to the struct vmw_resource to unreserve.
949 * @new_backup: Pointer to new backup buffer if command submission
951 * @new_backup_offset: New backup offset if @new_backup is !NULL.
953 * Currently unreserving a resource means putting it back on the device's
954 * resource lru list, so that it can be evicted if necessary.
956 void vmw_resource_unreserve(struct vmw_resource
*res
,
957 struct vmw_dma_buffer
*new_backup
,
958 unsigned long new_backup_offset
)
960 struct vmw_private
*dev_priv
= res
->dev_priv
;
962 if (!list_empty(&res
->lru_head
))
965 if (new_backup
&& new_backup
!= res
->backup
) {
968 lockdep_assert_held(&res
->backup
->base
.resv
->lock
.base
);
969 list_del_init(&res
->mob_head
);
970 vmw_dmabuf_unreference(&res
->backup
);
973 res
->backup
= vmw_dmabuf_reference(new_backup
);
974 lockdep_assert_held(&new_backup
->base
.resv
->lock
.base
);
975 list_add_tail(&res
->mob_head
, &new_backup
->res_list
);
978 res
->backup_offset
= new_backup_offset
;
980 if (!res
->func
->may_evict
|| res
->id
== -1)
983 write_lock(&dev_priv
->resource_lock
);
984 list_add_tail(&res
->lru_head
,
985 &res
->dev_priv
->res_lru
[res
->func
->res_type
]);
986 write_unlock(&dev_priv
->resource_lock
);
990 * vmw_resource_check_buffer - Check whether a backup buffer is needed
991 * for a resource and in that case, allocate
992 * one, reserve and validate it.
994 * @res: The resource for which to allocate a backup buffer.
995 * @interruptible: Whether any sleeps during allocation should be
996 * performed while interruptible.
997 * @val_buf: On successful return contains data about the
998 * reserved and validated backup buffer.
1001 vmw_resource_check_buffer(struct vmw_resource
*res
,
1003 struct ttm_validate_buffer
*val_buf
)
1005 struct list_head val_list
;
1006 bool backup_dirty
= false;
1009 if (unlikely(res
->backup
== NULL
)) {
1010 ret
= vmw_resource_buf_alloc(res
, interruptible
);
1011 if (unlikely(ret
!= 0))
1015 INIT_LIST_HEAD(&val_list
);
1016 val_buf
->bo
= ttm_bo_reference(&res
->backup
->base
);
1017 list_add_tail(&val_buf
->head
, &val_list
);
1018 ret
= ttm_eu_reserve_buffers(NULL
, &val_list
);
1019 if (unlikely(ret
!= 0))
1020 goto out_no_reserve
;
1022 if (res
->func
->needs_backup
&& list_empty(&res
->mob_head
))
1025 backup_dirty
= res
->backup_dirty
;
1026 ret
= ttm_bo_validate(&res
->backup
->base
,
1027 res
->func
->backup_placement
,
1030 if (unlikely(ret
!= 0))
1031 goto out_no_validate
;
1036 ttm_eu_backoff_reservation(NULL
, &val_list
);
1038 ttm_bo_unref(&val_buf
->bo
);
1040 vmw_dmabuf_unreference(&res
->backup
);
1046 * vmw_resource_reserve - Reserve a resource for command submission
1048 * @res: The resource to reserve.
1050 * This function takes the resource off the LRU list and make sure
1051 * a backup buffer is present for guest-backed resources. However,
1052 * the buffer may not be bound to the resource at this point.
1055 int vmw_resource_reserve(struct vmw_resource
*res
, bool no_backup
)
1057 struct vmw_private
*dev_priv
= res
->dev_priv
;
1060 write_lock(&dev_priv
->resource_lock
);
1061 list_del_init(&res
->lru_head
);
1062 write_unlock(&dev_priv
->resource_lock
);
1064 if (res
->func
->needs_backup
&& res
->backup
== NULL
&&
1066 ret
= vmw_resource_buf_alloc(res
, true);
1067 if (unlikely(ret
!= 0))
1075 * vmw_resource_backoff_reservation - Unreserve and unreference a
1078 * @val_buf: Backup buffer information.
1081 vmw_resource_backoff_reservation(struct ttm_validate_buffer
*val_buf
)
1083 struct list_head val_list
;
1085 if (likely(val_buf
->bo
== NULL
))
1088 INIT_LIST_HEAD(&val_list
);
1089 list_add_tail(&val_buf
->head
, &val_list
);
1090 ttm_eu_backoff_reservation(NULL
, &val_list
);
1091 ttm_bo_unref(&val_buf
->bo
);
1095 * vmw_resource_do_evict - Evict a resource, and transfer its data
1096 * to a backup buffer.
1098 * @res: The resource to evict.
1099 * @interruptible: Whether to wait interruptible.
1101 int vmw_resource_do_evict(struct vmw_resource
*res
, bool interruptible
)
1103 struct ttm_validate_buffer val_buf
;
1104 const struct vmw_res_func
*func
= res
->func
;
1107 BUG_ON(!func
->may_evict
);
1110 ret
= vmw_resource_check_buffer(res
, interruptible
, &val_buf
);
1111 if (unlikely(ret
!= 0))
1114 if (unlikely(func
->unbind
!= NULL
&&
1115 (!func
->needs_backup
|| !list_empty(&res
->mob_head
)))) {
1116 ret
= func
->unbind(res
, res
->res_dirty
, &val_buf
);
1117 if (unlikely(ret
!= 0))
1119 list_del_init(&res
->mob_head
);
1121 ret
= func
->destroy(res
);
1122 res
->backup_dirty
= true;
1123 res
->res_dirty
= false;
1125 vmw_resource_backoff_reservation(&val_buf
);
1132 * vmw_resource_validate - Make a resource up-to-date and visible
1135 * @res: The resource to make visible to the device.
1137 * On succesful return, any backup DMA buffer pointed to by @res->backup will
1138 * be reserved and validated.
1139 * On hardware resource shortage, this function will repeatedly evict
1140 * resources of the same type until the validation succeeds.
1142 int vmw_resource_validate(struct vmw_resource
*res
)
1145 struct vmw_resource
*evict_res
;
1146 struct vmw_private
*dev_priv
= res
->dev_priv
;
1147 struct list_head
*lru_list
= &dev_priv
->res_lru
[res
->func
->res_type
];
1148 struct ttm_validate_buffer val_buf
;
1149 unsigned err_count
= 0;
1151 if (likely(!res
->func
->may_evict
))
1156 val_buf
.bo
= &res
->backup
->base
;
1158 ret
= vmw_resource_do_validate(res
, &val_buf
);
1159 if (likely(ret
!= -EBUSY
))
1162 write_lock(&dev_priv
->resource_lock
);
1163 if (list_empty(lru_list
) || !res
->func
->may_evict
) {
1164 DRM_ERROR("Out of device device resources "
1165 "for %s.\n", res
->func
->type_name
);
1167 write_unlock(&dev_priv
->resource_lock
);
1171 evict_res
= vmw_resource_reference
1172 (list_first_entry(lru_list
, struct vmw_resource
,
1174 list_del_init(&evict_res
->lru_head
);
1176 write_unlock(&dev_priv
->resource_lock
);
1178 ret
= vmw_resource_do_evict(evict_res
, true);
1179 if (unlikely(ret
!= 0)) {
1180 write_lock(&dev_priv
->resource_lock
);
1181 list_add_tail(&evict_res
->lru_head
, lru_list
);
1182 write_unlock(&dev_priv
->resource_lock
);
1183 if (ret
== -ERESTARTSYS
||
1184 ++err_count
> VMW_RES_EVICT_ERR_COUNT
) {
1185 vmw_resource_unreference(&evict_res
);
1186 goto out_no_validate
;
1190 vmw_resource_unreference(&evict_res
);
1193 if (unlikely(ret
!= 0))
1194 goto out_no_validate
;
1195 else if (!res
->func
->needs_backup
&& res
->backup
) {
1196 list_del_init(&res
->mob_head
);
1197 vmw_dmabuf_unreference(&res
->backup
);
1207 * vmw_fence_single_bo - Utility function to fence a single TTM buffer
1208 * object without unreserving it.
1210 * @bo: Pointer to the struct ttm_buffer_object to fence.
1211 * @fence: Pointer to the fence. If NULL, this function will
1212 * insert a fence into the command stream..
1214 * Contrary to the ttm_eu version of this function, it takes only
1215 * a single buffer object instead of a list, and it also doesn't
1216 * unreserve the buffer object, which needs to be done separately.
1218 void vmw_fence_single_bo(struct ttm_buffer_object
*bo
,
1219 struct vmw_fence_obj
*fence
)
1221 struct ttm_bo_device
*bdev
= bo
->bdev
;
1222 struct ttm_bo_driver
*driver
= bdev
->driver
;
1223 struct vmw_fence_obj
*old_fence_obj
;
1224 struct vmw_private
*dev_priv
=
1225 container_of(bdev
, struct vmw_private
, bdev
);
1228 vmw_execbuf_fence_commands(NULL
, dev_priv
, &fence
, NULL
);
1230 driver
->sync_obj_ref(fence
);
1232 spin_lock(&bdev
->fence_lock
);
1234 old_fence_obj
= bo
->sync_obj
;
1235 bo
->sync_obj
= fence
;
1237 spin_unlock(&bdev
->fence_lock
);
1240 vmw_fence_obj_unreference(&old_fence_obj
);
1244 * vmw_resource_move_notify - TTM move_notify_callback
1246 * @bo: The TTM buffer object about to move.
1247 * @mem: The truct ttm_mem_reg indicating to what memory
1248 * region the move is taking place.
1250 * For now does nothing.
1252 void vmw_resource_move_notify(struct ttm_buffer_object
*bo
,
1253 struct ttm_mem_reg
*mem
)
1258 * vmw_resource_needs_backup - Return whether a resource needs a backup buffer.
1260 * @res: The resource being queried.
1262 bool vmw_resource_needs_backup(const struct vmw_resource
*res
)
1264 return res
->func
->needs_backup
;
1268 * vmw_resource_evict_type - Evict all resources of a specific type
1270 * @dev_priv: Pointer to a device private struct
1271 * @type: The resource type to evict
1273 * To avoid thrashing starvation or as part of the hibernation sequence,
1274 * try to evict all evictable resources of a specific type.
1276 static void vmw_resource_evict_type(struct vmw_private
*dev_priv
,
1277 enum vmw_res_type type
)
1279 struct list_head
*lru_list
= &dev_priv
->res_lru
[type
];
1280 struct vmw_resource
*evict_res
;
1281 unsigned err_count
= 0;
1285 write_lock(&dev_priv
->resource_lock
);
1287 if (list_empty(lru_list
))
1290 evict_res
= vmw_resource_reference(
1291 list_first_entry(lru_list
, struct vmw_resource
,
1293 list_del_init(&evict_res
->lru_head
);
1294 write_unlock(&dev_priv
->resource_lock
);
1296 ret
= vmw_resource_do_evict(evict_res
, false);
1297 if (unlikely(ret
!= 0)) {
1298 write_lock(&dev_priv
->resource_lock
);
1299 list_add_tail(&evict_res
->lru_head
, lru_list
);
1300 write_unlock(&dev_priv
->resource_lock
);
1301 if (++err_count
> VMW_RES_EVICT_ERR_COUNT
) {
1302 vmw_resource_unreference(&evict_res
);
1307 vmw_resource_unreference(&evict_res
);
1311 write_unlock(&dev_priv
->resource_lock
);
1315 * vmw_resource_evict_all - Evict all evictable resources
1317 * @dev_priv: Pointer to a device private struct
1319 * To avoid thrashing starvation or as part of the hibernation sequence,
1320 * evict all evictable resources. In particular this means that all
1321 * guest-backed resources that are registered with the device are
1322 * evicted and the OTable becomes clean.
1324 void vmw_resource_evict_all(struct vmw_private
*dev_priv
)
1326 enum vmw_res_type type
;
1328 mutex_lock(&dev_priv
->cmdbuf_mutex
);
1330 for (type
= 0; type
< vmw_res_max
; ++type
)
1331 vmw_resource_evict_type(dev_priv
, type
);
1333 mutex_unlock(&dev_priv
->cmdbuf_mutex
);