1 /**************************************************************************
3 * Copyright © 2009-2015 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"
34 #include "vmwgfx_binding.h"
36 #define VMW_RES_EVICT_ERR_COUNT 10
38 struct vmw_user_dma_buffer
{
39 struct ttm_prime_object prime
;
40 struct vmw_dma_buffer dma
;
43 struct vmw_bo_user_rep
{
49 struct vmw_resource res
;
53 struct vmw_user_stream
{
54 struct ttm_base_object base
;
55 struct vmw_stream stream
;
59 static uint64_t vmw_user_stream_size
;
61 static const struct vmw_res_func vmw_stream_func
= {
62 .res_type
= vmw_res_stream
,
63 .needs_backup
= false,
65 .type_name
= "video streams",
66 .backup_placement
= NULL
,
73 static inline struct vmw_dma_buffer
*
74 vmw_dma_buffer(struct ttm_buffer_object
*bo
)
76 return container_of(bo
, struct vmw_dma_buffer
, base
);
79 static inline struct vmw_user_dma_buffer
*
80 vmw_user_dma_buffer(struct ttm_buffer_object
*bo
)
82 struct vmw_dma_buffer
*vmw_bo
= vmw_dma_buffer(bo
);
83 return container_of(vmw_bo
, struct vmw_user_dma_buffer
, dma
);
86 struct vmw_resource
*vmw_resource_reference(struct vmw_resource
*res
)
93 vmw_resource_reference_unless_doomed(struct vmw_resource
*res
)
95 return kref_get_unless_zero(&res
->kref
) ? res
: NULL
;
99 * vmw_resource_release_id - release a resource id to the id manager.
101 * @res: Pointer to the resource.
103 * Release the resource id to the resource id manager and set it to -1
105 void vmw_resource_release_id(struct vmw_resource
*res
)
107 struct vmw_private
*dev_priv
= res
->dev_priv
;
108 struct idr
*idr
= &dev_priv
->res_idr
[res
->func
->res_type
];
110 write_lock(&dev_priv
->resource_lock
);
112 idr_remove(idr
, res
->id
);
114 write_unlock(&dev_priv
->resource_lock
);
117 static void vmw_resource_release(struct kref
*kref
)
119 struct vmw_resource
*res
=
120 container_of(kref
, struct vmw_resource
, kref
);
121 struct vmw_private
*dev_priv
= res
->dev_priv
;
123 struct idr
*idr
= &dev_priv
->res_idr
[res
->func
->res_type
];
125 write_lock(&dev_priv
->resource_lock
);
127 list_del_init(&res
->lru_head
);
128 write_unlock(&dev_priv
->resource_lock
);
130 struct ttm_buffer_object
*bo
= &res
->backup
->base
;
132 ttm_bo_reserve(bo
, false, false, false, NULL
);
133 if (!list_empty(&res
->mob_head
) &&
134 res
->func
->unbind
!= NULL
) {
135 struct ttm_validate_buffer val_buf
;
138 val_buf
.shared
= false;
139 res
->func
->unbind(res
, false, &val_buf
);
141 res
->backup_dirty
= false;
142 list_del_init(&res
->mob_head
);
143 ttm_bo_unreserve(bo
);
144 vmw_dmabuf_unreference(&res
->backup
);
147 if (likely(res
->hw_destroy
!= NULL
)) {
148 mutex_lock(&dev_priv
->binding_mutex
);
149 vmw_binding_res_list_kill(&res
->binding_head
);
150 mutex_unlock(&dev_priv
->binding_mutex
);
151 res
->hw_destroy(res
);
155 if (res
->res_free
!= NULL
)
160 write_lock(&dev_priv
->resource_lock
);
163 write_unlock(&dev_priv
->resource_lock
);
166 void vmw_resource_unreference(struct vmw_resource
**p_res
)
168 struct vmw_resource
*res
= *p_res
;
171 kref_put(&res
->kref
, vmw_resource_release
);
176 * vmw_resource_alloc_id - release a resource id to the id manager.
178 * @res: Pointer to the resource.
180 * Allocate the lowest free resource from the resource manager, and set
181 * @res->id to that id. Returns 0 on success and -ENOMEM on failure.
183 int vmw_resource_alloc_id(struct vmw_resource
*res
)
185 struct vmw_private
*dev_priv
= res
->dev_priv
;
187 struct idr
*idr
= &dev_priv
->res_idr
[res
->func
->res_type
];
189 BUG_ON(res
->id
!= -1);
191 idr_preload(GFP_KERNEL
);
192 write_lock(&dev_priv
->resource_lock
);
194 ret
= idr_alloc(idr
, res
, 1, 0, GFP_NOWAIT
);
198 write_unlock(&dev_priv
->resource_lock
);
200 return ret
< 0 ? ret
: 0;
204 * vmw_resource_init - initialize a struct vmw_resource
206 * @dev_priv: Pointer to a device private struct.
207 * @res: The struct vmw_resource to initialize.
208 * @obj_type: Resource object type.
209 * @delay_id: Boolean whether to defer device id allocation until
210 * the first validation.
211 * @res_free: Resource destructor.
212 * @func: Resource function table.
214 int vmw_resource_init(struct vmw_private
*dev_priv
, struct vmw_resource
*res
,
216 void (*res_free
) (struct vmw_resource
*res
),
217 const struct vmw_res_func
*func
)
219 kref_init(&res
->kref
);
220 res
->hw_destroy
= NULL
;
221 res
->res_free
= res_free
;
223 res
->dev_priv
= dev_priv
;
225 INIT_LIST_HEAD(&res
->lru_head
);
226 INIT_LIST_HEAD(&res
->mob_head
);
227 INIT_LIST_HEAD(&res
->binding_head
);
230 res
->backup_offset
= 0;
231 res
->backup_dirty
= false;
232 res
->res_dirty
= false;
236 return vmw_resource_alloc_id(res
);
240 * vmw_resource_activate
242 * @res: Pointer to the newly created resource
243 * @hw_destroy: Destroy function. NULL if none.
245 * Activate a resource after the hardware has been made aware of it.
246 * Set tye destroy function to @destroy. Typically this frees the
247 * resource and destroys the hardware resources associated with it.
248 * Activate basically means that the function vmw_resource_lookup will
251 void vmw_resource_activate(struct vmw_resource
*res
,
252 void (*hw_destroy
) (struct vmw_resource
*))
254 struct vmw_private
*dev_priv
= res
->dev_priv
;
256 write_lock(&dev_priv
->resource_lock
);
258 res
->hw_destroy
= hw_destroy
;
259 write_unlock(&dev_priv
->resource_lock
);
262 static struct vmw_resource
*vmw_resource_lookup(struct vmw_private
*dev_priv
,
263 struct idr
*idr
, int id
)
265 struct vmw_resource
*res
;
267 read_lock(&dev_priv
->resource_lock
);
268 res
= idr_find(idr
, id
);
269 if (!res
|| !res
->avail
|| !kref_get_unless_zero(&res
->kref
))
272 read_unlock(&dev_priv
->resource_lock
);
274 if (unlikely(res
== NULL
))
281 * vmw_user_resource_lookup_handle - lookup a struct resource from a
282 * TTM user-space handle and perform basic type checks
284 * @dev_priv: Pointer to a device private struct
285 * @tfile: Pointer to a struct ttm_object_file identifying the caller
286 * @handle: The TTM user-space handle
287 * @converter: Pointer to an object describing the resource type
288 * @p_res: On successful return the location pointed to will contain
289 * a pointer to a refcounted struct vmw_resource.
291 * If the handle can't be found or is associated with an incorrect resource
292 * type, -EINVAL will be returned.
294 int vmw_user_resource_lookup_handle(struct vmw_private
*dev_priv
,
295 struct ttm_object_file
*tfile
,
297 const struct vmw_user_resource_conv
299 struct vmw_resource
**p_res
)
301 struct ttm_base_object
*base
;
302 struct vmw_resource
*res
;
305 base
= ttm_base_object_lookup(tfile
, handle
);
306 if (unlikely(base
== NULL
))
309 if (unlikely(ttm_base_object_type(base
) != converter
->object_type
))
310 goto out_bad_resource
;
312 res
= converter
->base_obj_to_res(base
);
314 read_lock(&dev_priv
->resource_lock
);
315 if (!res
->avail
|| res
->res_free
!= converter
->res_free
) {
316 read_unlock(&dev_priv
->resource_lock
);
317 goto out_bad_resource
;
320 kref_get(&res
->kref
);
321 read_unlock(&dev_priv
->resource_lock
);
327 ttm_base_object_unref(&base
);
333 * Helper function that looks either a surface or dmabuf.
335 * The pointer this pointed at by out_surf and out_buf needs to be null.
337 int vmw_user_lookup_handle(struct vmw_private
*dev_priv
,
338 struct ttm_object_file
*tfile
,
340 struct vmw_surface
**out_surf
,
341 struct vmw_dma_buffer
**out_buf
)
343 struct vmw_resource
*res
;
346 BUG_ON(*out_surf
|| *out_buf
);
348 ret
= vmw_user_resource_lookup_handle(dev_priv
, tfile
, handle
,
349 user_surface_converter
,
352 *out_surf
= vmw_res_to_srf(res
);
357 ret
= vmw_user_dmabuf_lookup(tfile
, handle
, out_buf
);
366 * vmw_dmabuf_acc_size - Calculate the pinned memory usage of buffers
368 * @dev_priv: Pointer to a struct vmw_private identifying the device.
369 * @size: The requested buffer size.
370 * @user: Whether this is an ordinary dma buffer or a user dma buffer.
372 static size_t vmw_dmabuf_acc_size(struct vmw_private
*dev_priv
, size_t size
,
375 static size_t struct_size
, user_struct_size
;
376 size_t num_pages
= PAGE_ALIGN(size
) >> PAGE_SHIFT
;
377 size_t page_array_size
= ttm_round_pot(num_pages
* sizeof(void *));
379 if (unlikely(struct_size
== 0)) {
380 size_t backend_size
= ttm_round_pot(vmw_tt_size
);
382 struct_size
= backend_size
+
383 ttm_round_pot(sizeof(struct vmw_dma_buffer
));
384 user_struct_size
= backend_size
+
385 ttm_round_pot(sizeof(struct vmw_user_dma_buffer
));
388 if (dev_priv
->map_mode
== vmw_dma_alloc_coherent
)
390 ttm_round_pot(num_pages
* sizeof(dma_addr_t
));
392 return ((user
) ? user_struct_size
: struct_size
) +
396 void vmw_dmabuf_bo_free(struct ttm_buffer_object
*bo
)
398 struct vmw_dma_buffer
*vmw_bo
= vmw_dma_buffer(bo
);
403 static void vmw_user_dmabuf_destroy(struct ttm_buffer_object
*bo
)
405 struct vmw_user_dma_buffer
*vmw_user_bo
= vmw_user_dma_buffer(bo
);
407 ttm_prime_object_kfree(vmw_user_bo
, prime
);
410 int vmw_dmabuf_init(struct vmw_private
*dev_priv
,
411 struct vmw_dma_buffer
*vmw_bo
,
412 size_t size
, struct ttm_placement
*placement
,
414 void (*bo_free
) (struct ttm_buffer_object
*bo
))
416 struct ttm_bo_device
*bdev
= &dev_priv
->bdev
;
419 bool user
= (bo_free
== &vmw_user_dmabuf_destroy
);
421 BUG_ON(!bo_free
&& (!user
&& (bo_free
!= vmw_dmabuf_bo_free
)));
423 acc_size
= vmw_dmabuf_acc_size(dev_priv
, size
, user
);
424 memset(vmw_bo
, 0, sizeof(*vmw_bo
));
426 INIT_LIST_HEAD(&vmw_bo
->res_list
);
428 ret
= ttm_bo_init(bdev
, &vmw_bo
->base
, size
,
429 ttm_bo_type_device
, placement
,
431 NULL
, acc_size
, NULL
, NULL
, bo_free
);
435 static void vmw_user_dmabuf_release(struct ttm_base_object
**p_base
)
437 struct vmw_user_dma_buffer
*vmw_user_bo
;
438 struct ttm_base_object
*base
= *p_base
;
439 struct ttm_buffer_object
*bo
;
443 if (unlikely(base
== NULL
))
446 vmw_user_bo
= container_of(base
, struct vmw_user_dma_buffer
,
448 bo
= &vmw_user_bo
->dma
.base
;
452 static void vmw_user_dmabuf_ref_obj_release(struct ttm_base_object
*base
,
453 enum ttm_ref_type ref_type
)
455 struct vmw_user_dma_buffer
*user_bo
;
456 user_bo
= container_of(base
, struct vmw_user_dma_buffer
, prime
.base
);
459 case TTM_REF_SYNCCPU_WRITE
:
460 ttm_bo_synccpu_write_release(&user_bo
->dma
.base
);
468 * vmw_user_dmabuf_alloc - Allocate a user dma buffer
470 * @dev_priv: Pointer to a struct device private.
471 * @tfile: Pointer to a struct ttm_object_file on which to register the user
473 * @size: Size of the dma buffer.
474 * @shareable: Boolean whether the buffer is shareable with other open files.
475 * @handle: Pointer to where the handle value should be assigned.
476 * @p_dma_buf: Pointer to where the refcounted struct vmw_dma_buffer pointer
477 * should be assigned.
479 int vmw_user_dmabuf_alloc(struct vmw_private
*dev_priv
,
480 struct ttm_object_file
*tfile
,
484 struct vmw_dma_buffer
**p_dma_buf
)
486 struct vmw_user_dma_buffer
*user_bo
;
487 struct ttm_buffer_object
*tmp
;
490 user_bo
= kzalloc(sizeof(*user_bo
), GFP_KERNEL
);
491 if (unlikely(user_bo
== NULL
)) {
492 DRM_ERROR("Failed to allocate a buffer.\n");
496 ret
= vmw_dmabuf_init(dev_priv
, &user_bo
->dma
, size
,
497 (dev_priv
->has_mob
) ?
499 &vmw_vram_sys_placement
, true,
500 &vmw_user_dmabuf_destroy
);
501 if (unlikely(ret
!= 0))
504 tmp
= ttm_bo_reference(&user_bo
->dma
.base
);
505 ret
= ttm_prime_object_init(tfile
,
510 &vmw_user_dmabuf_release
,
511 &vmw_user_dmabuf_ref_obj_release
);
512 if (unlikely(ret
!= 0)) {
514 goto out_no_base_object
;
517 *p_dma_buf
= &user_bo
->dma
;
518 *handle
= user_bo
->prime
.base
.hash
.key
;
525 * vmw_user_dmabuf_verify_access - verify access permissions on this
528 * @bo: Pointer to the buffer object being accessed
529 * @tfile: Identifying the caller.
531 int vmw_user_dmabuf_verify_access(struct ttm_buffer_object
*bo
,
532 struct ttm_object_file
*tfile
)
534 struct vmw_user_dma_buffer
*vmw_user_bo
;
536 if (unlikely(bo
->destroy
!= vmw_user_dmabuf_destroy
))
539 vmw_user_bo
= vmw_user_dma_buffer(bo
);
541 /* Check that the caller has opened the object. */
542 if (likely(ttm_ref_object_exists(tfile
, &vmw_user_bo
->prime
.base
)))
545 DRM_ERROR("Could not grant buffer access.\n");
550 * vmw_user_dmabuf_synccpu_grab - Grab a struct vmw_user_dma_buffer for cpu
551 * access, idling previous GPU operations on the buffer and optionally
552 * blocking it for further command submissions.
554 * @user_bo: Pointer to the buffer object being grabbed for CPU access
555 * @tfile: Identifying the caller.
556 * @flags: Flags indicating how the grab should be performed.
558 * A blocking grab will be automatically released when @tfile is closed.
560 static int vmw_user_dmabuf_synccpu_grab(struct vmw_user_dma_buffer
*user_bo
,
561 struct ttm_object_file
*tfile
,
564 struct ttm_buffer_object
*bo
= &user_bo
->dma
.base
;
568 if (flags
& drm_vmw_synccpu_allow_cs
) {
569 bool nonblock
= !!(flags
& drm_vmw_synccpu_dontblock
);
573 return reservation_object_test_signaled_rcu(bo
->resv
, true) ? 0 : -EBUSY
;
575 lret
= reservation_object_wait_timeout_rcu(bo
->resv
, true, true, MAX_SCHEDULE_TIMEOUT
);
583 ret
= ttm_bo_synccpu_write_grab
584 (bo
, !!(flags
& drm_vmw_synccpu_dontblock
));
585 if (unlikely(ret
!= 0))
588 ret
= ttm_ref_object_add(tfile
, &user_bo
->prime
.base
,
589 TTM_REF_SYNCCPU_WRITE
, &existed
);
590 if (ret
!= 0 || existed
)
591 ttm_bo_synccpu_write_release(&user_bo
->dma
.base
);
597 * vmw_user_dmabuf_synccpu_release - Release a previous grab for CPU access,
598 * and unblock command submission on the buffer if blocked.
600 * @handle: Handle identifying the buffer object.
601 * @tfile: Identifying the caller.
602 * @flags: Flags indicating the type of release.
604 static int vmw_user_dmabuf_synccpu_release(uint32_t handle
,
605 struct ttm_object_file
*tfile
,
608 if (!(flags
& drm_vmw_synccpu_allow_cs
))
609 return ttm_ref_object_base_unref(tfile
, handle
,
610 TTM_REF_SYNCCPU_WRITE
);
616 * vmw_user_dmabuf_synccpu_release - ioctl function implementing the synccpu
619 * @dev: Identifies the drm device.
620 * @data: Pointer to the ioctl argument.
621 * @file_priv: Identifies the caller.
623 * This function checks the ioctl arguments for validity and calls the
624 * relevant synccpu functions.
626 int vmw_user_dmabuf_synccpu_ioctl(struct drm_device
*dev
, void *data
,
627 struct drm_file
*file_priv
)
629 struct drm_vmw_synccpu_arg
*arg
=
630 (struct drm_vmw_synccpu_arg
*) data
;
631 struct vmw_dma_buffer
*dma_buf
;
632 struct vmw_user_dma_buffer
*user_bo
;
633 struct ttm_object_file
*tfile
= vmw_fpriv(file_priv
)->tfile
;
636 if ((arg
->flags
& (drm_vmw_synccpu_read
| drm_vmw_synccpu_write
)) == 0
637 || (arg
->flags
& ~(drm_vmw_synccpu_read
| drm_vmw_synccpu_write
|
638 drm_vmw_synccpu_dontblock
|
639 drm_vmw_synccpu_allow_cs
)) != 0) {
640 DRM_ERROR("Illegal synccpu flags.\n");
645 case drm_vmw_synccpu_grab
:
646 ret
= vmw_user_dmabuf_lookup(tfile
, arg
->handle
, &dma_buf
);
647 if (unlikely(ret
!= 0))
650 user_bo
= container_of(dma_buf
, struct vmw_user_dma_buffer
,
652 ret
= vmw_user_dmabuf_synccpu_grab(user_bo
, tfile
, arg
->flags
);
653 vmw_dmabuf_unreference(&dma_buf
);
654 if (unlikely(ret
!= 0 && ret
!= -ERESTARTSYS
&&
656 DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n",
657 (unsigned int) arg
->handle
);
661 case drm_vmw_synccpu_release
:
662 ret
= vmw_user_dmabuf_synccpu_release(arg
->handle
, tfile
,
664 if (unlikely(ret
!= 0)) {
665 DRM_ERROR("Failed synccpu release on handle 0x%08x.\n",
666 (unsigned int) arg
->handle
);
671 DRM_ERROR("Invalid synccpu operation.\n");
678 int vmw_dmabuf_alloc_ioctl(struct drm_device
*dev
, void *data
,
679 struct drm_file
*file_priv
)
681 struct vmw_private
*dev_priv
= vmw_priv(dev
);
682 union drm_vmw_alloc_dmabuf_arg
*arg
=
683 (union drm_vmw_alloc_dmabuf_arg
*)data
;
684 struct drm_vmw_alloc_dmabuf_req
*req
= &arg
->req
;
685 struct drm_vmw_dmabuf_rep
*rep
= &arg
->rep
;
686 struct vmw_dma_buffer
*dma_buf
;
690 ret
= ttm_read_lock(&dev_priv
->reservation_sem
, true);
691 if (unlikely(ret
!= 0))
694 ret
= vmw_user_dmabuf_alloc(dev_priv
, vmw_fpriv(file_priv
)->tfile
,
695 req
->size
, false, &handle
, &dma_buf
);
696 if (unlikely(ret
!= 0))
699 rep
->handle
= handle
;
700 rep
->map_handle
= drm_vma_node_offset_addr(&dma_buf
->base
.vma_node
);
701 rep
->cur_gmr_id
= handle
;
702 rep
->cur_gmr_offset
= 0;
704 vmw_dmabuf_unreference(&dma_buf
);
707 ttm_read_unlock(&dev_priv
->reservation_sem
);
712 int vmw_dmabuf_unref_ioctl(struct drm_device
*dev
, void *data
,
713 struct drm_file
*file_priv
)
715 struct drm_vmw_unref_dmabuf_arg
*arg
=
716 (struct drm_vmw_unref_dmabuf_arg
*)data
;
718 return ttm_ref_object_base_unref(vmw_fpriv(file_priv
)->tfile
,
723 int vmw_user_dmabuf_lookup(struct ttm_object_file
*tfile
,
724 uint32_t handle
, struct vmw_dma_buffer
**out
)
726 struct vmw_user_dma_buffer
*vmw_user_bo
;
727 struct ttm_base_object
*base
;
729 base
= ttm_base_object_lookup(tfile
, handle
);
730 if (unlikely(base
== NULL
)) {
731 printk(KERN_ERR
"Invalid buffer object handle 0x%08lx.\n",
732 (unsigned long)handle
);
736 if (unlikely(ttm_base_object_type(base
) != ttm_buffer_type
)) {
737 ttm_base_object_unref(&base
);
738 printk(KERN_ERR
"Invalid buffer object handle 0x%08lx.\n",
739 (unsigned long)handle
);
743 vmw_user_bo
= container_of(base
, struct vmw_user_dma_buffer
,
745 (void)ttm_bo_reference(&vmw_user_bo
->dma
.base
);
746 ttm_base_object_unref(&base
);
747 *out
= &vmw_user_bo
->dma
;
752 int vmw_user_dmabuf_reference(struct ttm_object_file
*tfile
,
753 struct vmw_dma_buffer
*dma_buf
,
756 struct vmw_user_dma_buffer
*user_bo
;
758 if (dma_buf
->base
.destroy
!= vmw_user_dmabuf_destroy
)
761 user_bo
= container_of(dma_buf
, struct vmw_user_dma_buffer
, dma
);
763 *handle
= user_bo
->prime
.base
.hash
.key
;
764 return ttm_ref_object_add(tfile
, &user_bo
->prime
.base
,
765 TTM_REF_USAGE
, NULL
);
772 static void vmw_stream_destroy(struct vmw_resource
*res
)
774 struct vmw_private
*dev_priv
= res
->dev_priv
;
775 struct vmw_stream
*stream
;
778 DRM_INFO("%s: unref\n", __func__
);
779 stream
= container_of(res
, struct vmw_stream
, res
);
781 ret
= vmw_overlay_unref(dev_priv
, stream
->stream_id
);
785 static int vmw_stream_init(struct vmw_private
*dev_priv
,
786 struct vmw_stream
*stream
,
787 void (*res_free
) (struct vmw_resource
*res
))
789 struct vmw_resource
*res
= &stream
->res
;
792 ret
= vmw_resource_init(dev_priv
, res
, false, res_free
,
795 if (unlikely(ret
!= 0)) {
796 if (res_free
== NULL
)
799 res_free(&stream
->res
);
803 ret
= vmw_overlay_claim(dev_priv
, &stream
->stream_id
);
805 vmw_resource_unreference(&res
);
809 DRM_INFO("%s: claimed\n", __func__
);
811 vmw_resource_activate(&stream
->res
, vmw_stream_destroy
);
815 static void vmw_user_stream_free(struct vmw_resource
*res
)
817 struct vmw_user_stream
*stream
=
818 container_of(res
, struct vmw_user_stream
, stream
.res
);
819 struct vmw_private
*dev_priv
= res
->dev_priv
;
821 ttm_base_object_kfree(stream
, base
);
822 ttm_mem_global_free(vmw_mem_glob(dev_priv
),
823 vmw_user_stream_size
);
827 * This function is called when user space has no more references on the
828 * base object. It releases the base-object's reference on the resource object.
831 static void vmw_user_stream_base_release(struct ttm_base_object
**p_base
)
833 struct ttm_base_object
*base
= *p_base
;
834 struct vmw_user_stream
*stream
=
835 container_of(base
, struct vmw_user_stream
, base
);
836 struct vmw_resource
*res
= &stream
->stream
.res
;
839 vmw_resource_unreference(&res
);
842 int vmw_stream_unref_ioctl(struct drm_device
*dev
, void *data
,
843 struct drm_file
*file_priv
)
845 struct vmw_private
*dev_priv
= vmw_priv(dev
);
846 struct vmw_resource
*res
;
847 struct vmw_user_stream
*stream
;
848 struct drm_vmw_stream_arg
*arg
= (struct drm_vmw_stream_arg
*)data
;
849 struct ttm_object_file
*tfile
= vmw_fpriv(file_priv
)->tfile
;
850 struct idr
*idr
= &dev_priv
->res_idr
[vmw_res_stream
];
854 res
= vmw_resource_lookup(dev_priv
, idr
, arg
->stream_id
);
855 if (unlikely(res
== NULL
))
858 if (res
->res_free
!= &vmw_user_stream_free
) {
863 stream
= container_of(res
, struct vmw_user_stream
, stream
.res
);
864 if (stream
->base
.tfile
!= tfile
) {
869 ttm_ref_object_base_unref(tfile
, stream
->base
.hash
.key
, TTM_REF_USAGE
);
871 vmw_resource_unreference(&res
);
875 int vmw_stream_claim_ioctl(struct drm_device
*dev
, void *data
,
876 struct drm_file
*file_priv
)
878 struct vmw_private
*dev_priv
= vmw_priv(dev
);
879 struct vmw_user_stream
*stream
;
880 struct vmw_resource
*res
;
881 struct vmw_resource
*tmp
;
882 struct drm_vmw_stream_arg
*arg
= (struct drm_vmw_stream_arg
*)data
;
883 struct ttm_object_file
*tfile
= vmw_fpriv(file_priv
)->tfile
;
887 * Approximate idr memory usage with 128 bytes. It will be limited
888 * by maximum number_of streams anyway?
891 if (unlikely(vmw_user_stream_size
== 0))
892 vmw_user_stream_size
= ttm_round_pot(sizeof(*stream
)) + 128;
894 ret
= ttm_read_lock(&dev_priv
->reservation_sem
, true);
895 if (unlikely(ret
!= 0))
898 ret
= ttm_mem_global_alloc(vmw_mem_glob(dev_priv
),
899 vmw_user_stream_size
,
901 ttm_read_unlock(&dev_priv
->reservation_sem
);
902 if (unlikely(ret
!= 0)) {
903 if (ret
!= -ERESTARTSYS
)
904 DRM_ERROR("Out of graphics memory for stream"
910 stream
= kmalloc(sizeof(*stream
), GFP_KERNEL
);
911 if (unlikely(stream
== NULL
)) {
912 ttm_mem_global_free(vmw_mem_glob(dev_priv
),
913 vmw_user_stream_size
);
918 res
= &stream
->stream
.res
;
919 stream
->base
.shareable
= false;
920 stream
->base
.tfile
= NULL
;
923 * From here on, the destructor takes over resource freeing.
926 ret
= vmw_stream_init(dev_priv
, &stream
->stream
, vmw_user_stream_free
);
927 if (unlikely(ret
!= 0))
930 tmp
= vmw_resource_reference(res
);
931 ret
= ttm_base_object_init(tfile
, &stream
->base
, false, VMW_RES_STREAM
,
932 &vmw_user_stream_base_release
, NULL
);
934 if (unlikely(ret
!= 0)) {
935 vmw_resource_unreference(&tmp
);
939 arg
->stream_id
= res
->id
;
941 vmw_resource_unreference(&res
);
946 int vmw_user_stream_lookup(struct vmw_private
*dev_priv
,
947 struct ttm_object_file
*tfile
,
948 uint32_t *inout_id
, struct vmw_resource
**out
)
950 struct vmw_user_stream
*stream
;
951 struct vmw_resource
*res
;
954 res
= vmw_resource_lookup(dev_priv
, &dev_priv
->res_idr
[vmw_res_stream
],
956 if (unlikely(res
== NULL
))
959 if (res
->res_free
!= &vmw_user_stream_free
) {
964 stream
= container_of(res
, struct vmw_user_stream
, stream
.res
);
965 if (stream
->base
.tfile
!= tfile
) {
970 *inout_id
= stream
->stream
.stream_id
;
974 vmw_resource_unreference(&res
);
980 * vmw_dumb_create - Create a dumb kms buffer
982 * @file_priv: Pointer to a struct drm_file identifying the caller.
983 * @dev: Pointer to the drm device.
984 * @args: Pointer to a struct drm_mode_create_dumb structure
986 * This is a driver callback for the core drm create_dumb functionality.
987 * Note that this is very similar to the vmw_dmabuf_alloc ioctl, except
988 * that the arguments have a different format.
990 int vmw_dumb_create(struct drm_file
*file_priv
,
991 struct drm_device
*dev
,
992 struct drm_mode_create_dumb
*args
)
994 struct vmw_private
*dev_priv
= vmw_priv(dev
);
995 struct vmw_dma_buffer
*dma_buf
;
998 args
->pitch
= args
->width
* ((args
->bpp
+ 7) / 8);
999 args
->size
= args
->pitch
* args
->height
;
1001 ret
= ttm_read_lock(&dev_priv
->reservation_sem
, true);
1002 if (unlikely(ret
!= 0))
1005 ret
= vmw_user_dmabuf_alloc(dev_priv
, vmw_fpriv(file_priv
)->tfile
,
1006 args
->size
, false, &args
->handle
,
1008 if (unlikely(ret
!= 0))
1011 vmw_dmabuf_unreference(&dma_buf
);
1013 ttm_read_unlock(&dev_priv
->reservation_sem
);
1018 * vmw_dumb_map_offset - Return the address space offset of a dumb buffer
1020 * @file_priv: Pointer to a struct drm_file identifying the caller.
1021 * @dev: Pointer to the drm device.
1022 * @handle: Handle identifying the dumb buffer.
1023 * @offset: The address space offset returned.
1025 * This is a driver callback for the core drm dumb_map_offset functionality.
1027 int vmw_dumb_map_offset(struct drm_file
*file_priv
,
1028 struct drm_device
*dev
, uint32_t handle
,
1031 struct ttm_object_file
*tfile
= vmw_fpriv(file_priv
)->tfile
;
1032 struct vmw_dma_buffer
*out_buf
;
1035 ret
= vmw_user_dmabuf_lookup(tfile
, handle
, &out_buf
);
1039 *offset
= drm_vma_node_offset_addr(&out_buf
->base
.vma_node
);
1040 vmw_dmabuf_unreference(&out_buf
);
1045 * vmw_dumb_destroy - Destroy a dumb boffer
1047 * @file_priv: Pointer to a struct drm_file identifying the caller.
1048 * @dev: Pointer to the drm device.
1049 * @handle: Handle identifying the dumb buffer.
1051 * This is a driver callback for the core drm dumb_destroy functionality.
1053 int vmw_dumb_destroy(struct drm_file
*file_priv
,
1054 struct drm_device
*dev
,
1057 return ttm_ref_object_base_unref(vmw_fpriv(file_priv
)->tfile
,
1058 handle
, TTM_REF_USAGE
);
1062 * vmw_resource_buf_alloc - Allocate a backup buffer for a resource.
1064 * @res: The resource for which to allocate a backup buffer.
1065 * @interruptible: Whether any sleeps during allocation should be
1066 * performed while interruptible.
1068 static int vmw_resource_buf_alloc(struct vmw_resource
*res
,
1071 unsigned long size
=
1072 (res
->backup_size
+ PAGE_SIZE
- 1) & PAGE_MASK
;
1073 struct vmw_dma_buffer
*backup
;
1076 if (likely(res
->backup
)) {
1077 BUG_ON(res
->backup
->base
.num_pages
* PAGE_SIZE
< size
);
1081 backup
= kzalloc(sizeof(*backup
), GFP_KERNEL
);
1082 if (unlikely(backup
== NULL
))
1085 ret
= vmw_dmabuf_init(res
->dev_priv
, backup
, res
->backup_size
,
1086 res
->func
->backup_placement
,
1088 &vmw_dmabuf_bo_free
);
1089 if (unlikely(ret
!= 0))
1092 res
->backup
= backup
;
1099 * vmw_resource_do_validate - Make a resource up-to-date and visible
1102 * @res: The resource to make visible to the device.
1103 * @val_buf: Information about a buffer possibly
1104 * containing backup data if a bind operation is needed.
1106 * On hardware resource shortage, this function returns -EBUSY and
1107 * should be retried once resources have been freed up.
1109 static int vmw_resource_do_validate(struct vmw_resource
*res
,
1110 struct ttm_validate_buffer
*val_buf
)
1113 const struct vmw_res_func
*func
= res
->func
;
1115 if (unlikely(res
->id
== -1)) {
1116 ret
= func
->create(res
);
1117 if (unlikely(ret
!= 0))
1122 ((func
->needs_backup
&& list_empty(&res
->mob_head
) &&
1123 val_buf
->bo
!= NULL
) ||
1124 (!func
->needs_backup
&& val_buf
->bo
!= NULL
))) {
1125 ret
= func
->bind(res
, val_buf
);
1126 if (unlikely(ret
!= 0))
1127 goto out_bind_failed
;
1128 if (func
->needs_backup
)
1129 list_add_tail(&res
->mob_head
, &res
->backup
->res_list
);
1133 * Only do this on write operations, and move to
1134 * vmw_resource_unreserve if it can be called after
1135 * backup buffers have been unreserved. Otherwise
1138 res
->res_dirty
= true;
1149 * vmw_resource_unreserve - Unreserve a resource previously reserved for
1150 * command submission.
1152 * @res: Pointer to the struct vmw_resource to unreserve.
1153 * @switch_backup: Backup buffer has been switched.
1154 * @new_backup: Pointer to new backup buffer if command submission
1155 * switched. May be NULL.
1156 * @new_backup_offset: New backup offset if @switch_backup is true.
1158 * Currently unreserving a resource means putting it back on the device's
1159 * resource lru list, so that it can be evicted if necessary.
1161 void vmw_resource_unreserve(struct vmw_resource
*res
,
1163 struct vmw_dma_buffer
*new_backup
,
1164 unsigned long new_backup_offset
)
1166 struct vmw_private
*dev_priv
= res
->dev_priv
;
1168 if (!list_empty(&res
->lru_head
))
1171 if (switch_backup
&& new_backup
!= res
->backup
) {
1173 lockdep_assert_held(&res
->backup
->base
.resv
->lock
.base
);
1174 list_del_init(&res
->mob_head
);
1175 vmw_dmabuf_unreference(&res
->backup
);
1179 res
->backup
= vmw_dmabuf_reference(new_backup
);
1180 lockdep_assert_held(&new_backup
->base
.resv
->lock
.base
);
1181 list_add_tail(&res
->mob_head
, &new_backup
->res_list
);
1187 res
->backup_offset
= new_backup_offset
;
1189 if (!res
->func
->may_evict
|| res
->id
== -1 || res
->pin_count
)
1192 write_lock(&dev_priv
->resource_lock
);
1193 list_add_tail(&res
->lru_head
,
1194 &res
->dev_priv
->res_lru
[res
->func
->res_type
]);
1195 write_unlock(&dev_priv
->resource_lock
);
1199 * vmw_resource_check_buffer - Check whether a backup buffer is needed
1200 * for a resource and in that case, allocate
1201 * one, reserve and validate it.
1203 * @res: The resource for which to allocate a backup buffer.
1204 * @interruptible: Whether any sleeps during allocation should be
1205 * performed while interruptible.
1206 * @val_buf: On successful return contains data about the
1207 * reserved and validated backup buffer.
1210 vmw_resource_check_buffer(struct vmw_resource
*res
,
1212 struct ttm_validate_buffer
*val_buf
)
1214 struct list_head val_list
;
1215 bool backup_dirty
= false;
1218 if (unlikely(res
->backup
== NULL
)) {
1219 ret
= vmw_resource_buf_alloc(res
, interruptible
);
1220 if (unlikely(ret
!= 0))
1224 INIT_LIST_HEAD(&val_list
);
1225 val_buf
->bo
= ttm_bo_reference(&res
->backup
->base
);
1226 val_buf
->shared
= false;
1227 list_add_tail(&val_buf
->head
, &val_list
);
1228 ret
= ttm_eu_reserve_buffers(NULL
, &val_list
, interruptible
, NULL
);
1229 if (unlikely(ret
!= 0))
1230 goto out_no_reserve
;
1232 if (res
->func
->needs_backup
&& list_empty(&res
->mob_head
))
1235 backup_dirty
= res
->backup_dirty
;
1236 ret
= ttm_bo_validate(&res
->backup
->base
,
1237 res
->func
->backup_placement
,
1240 if (unlikely(ret
!= 0))
1241 goto out_no_validate
;
1246 ttm_eu_backoff_reservation(NULL
, &val_list
);
1248 ttm_bo_unref(&val_buf
->bo
);
1250 vmw_dmabuf_unreference(&res
->backup
);
1256 * vmw_resource_reserve - Reserve a resource for command submission
1258 * @res: The resource to reserve.
1260 * This function takes the resource off the LRU list and make sure
1261 * a backup buffer is present for guest-backed resources. However,
1262 * the buffer may not be bound to the resource at this point.
1265 int vmw_resource_reserve(struct vmw_resource
*res
, bool interruptible
,
1268 struct vmw_private
*dev_priv
= res
->dev_priv
;
1271 write_lock(&dev_priv
->resource_lock
);
1272 list_del_init(&res
->lru_head
);
1273 write_unlock(&dev_priv
->resource_lock
);
1275 if (res
->func
->needs_backup
&& res
->backup
== NULL
&&
1277 ret
= vmw_resource_buf_alloc(res
, interruptible
);
1278 if (unlikely(ret
!= 0)) {
1279 DRM_ERROR("Failed to allocate a backup buffer "
1280 "of size %lu. bytes\n",
1281 (unsigned long) res
->backup_size
);
1290 * vmw_resource_backoff_reservation - Unreserve and unreference a
1293 * @val_buf: Backup buffer information.
1296 vmw_resource_backoff_reservation(struct ttm_validate_buffer
*val_buf
)
1298 struct list_head val_list
;
1300 if (likely(val_buf
->bo
== NULL
))
1303 INIT_LIST_HEAD(&val_list
);
1304 list_add_tail(&val_buf
->head
, &val_list
);
1305 ttm_eu_backoff_reservation(NULL
, &val_list
);
1306 ttm_bo_unref(&val_buf
->bo
);
1310 * vmw_resource_do_evict - Evict a resource, and transfer its data
1311 * to a backup buffer.
1313 * @res: The resource to evict.
1314 * @interruptible: Whether to wait interruptible.
1316 static int vmw_resource_do_evict(struct vmw_resource
*res
, bool interruptible
)
1318 struct ttm_validate_buffer val_buf
;
1319 const struct vmw_res_func
*func
= res
->func
;
1322 BUG_ON(!func
->may_evict
);
1325 val_buf
.shared
= false;
1326 ret
= vmw_resource_check_buffer(res
, interruptible
, &val_buf
);
1327 if (unlikely(ret
!= 0))
1330 if (unlikely(func
->unbind
!= NULL
&&
1331 (!func
->needs_backup
|| !list_empty(&res
->mob_head
)))) {
1332 ret
= func
->unbind(res
, res
->res_dirty
, &val_buf
);
1333 if (unlikely(ret
!= 0))
1335 list_del_init(&res
->mob_head
);
1337 ret
= func
->destroy(res
);
1338 res
->backup_dirty
= true;
1339 res
->res_dirty
= false;
1341 vmw_resource_backoff_reservation(&val_buf
);
1348 * vmw_resource_validate - Make a resource up-to-date and visible
1351 * @res: The resource to make visible to the device.
1353 * On succesful return, any backup DMA buffer pointed to by @res->backup will
1354 * be reserved and validated.
1355 * On hardware resource shortage, this function will repeatedly evict
1356 * resources of the same type until the validation succeeds.
1358 int vmw_resource_validate(struct vmw_resource
*res
)
1361 struct vmw_resource
*evict_res
;
1362 struct vmw_private
*dev_priv
= res
->dev_priv
;
1363 struct list_head
*lru_list
= &dev_priv
->res_lru
[res
->func
->res_type
];
1364 struct ttm_validate_buffer val_buf
;
1365 unsigned err_count
= 0;
1367 if (!res
->func
->create
)
1371 val_buf
.shared
= false;
1373 val_buf
.bo
= &res
->backup
->base
;
1375 ret
= vmw_resource_do_validate(res
, &val_buf
);
1376 if (likely(ret
!= -EBUSY
))
1379 write_lock(&dev_priv
->resource_lock
);
1380 if (list_empty(lru_list
) || !res
->func
->may_evict
) {
1381 DRM_ERROR("Out of device device resources "
1382 "for %s.\n", res
->func
->type_name
);
1384 write_unlock(&dev_priv
->resource_lock
);
1388 evict_res
= vmw_resource_reference
1389 (list_first_entry(lru_list
, struct vmw_resource
,
1391 list_del_init(&evict_res
->lru_head
);
1393 write_unlock(&dev_priv
->resource_lock
);
1395 ret
= vmw_resource_do_evict(evict_res
, true);
1396 if (unlikely(ret
!= 0)) {
1397 write_lock(&dev_priv
->resource_lock
);
1398 list_add_tail(&evict_res
->lru_head
, lru_list
);
1399 write_unlock(&dev_priv
->resource_lock
);
1400 if (ret
== -ERESTARTSYS
||
1401 ++err_count
> VMW_RES_EVICT_ERR_COUNT
) {
1402 vmw_resource_unreference(&evict_res
);
1403 goto out_no_validate
;
1407 vmw_resource_unreference(&evict_res
);
1410 if (unlikely(ret
!= 0))
1411 goto out_no_validate
;
1412 else if (!res
->func
->needs_backup
&& res
->backup
) {
1413 list_del_init(&res
->mob_head
);
1414 vmw_dmabuf_unreference(&res
->backup
);
1424 * vmw_fence_single_bo - Utility function to fence a single TTM buffer
1425 * object without unreserving it.
1427 * @bo: Pointer to the struct ttm_buffer_object to fence.
1428 * @fence: Pointer to the fence. If NULL, this function will
1429 * insert a fence into the command stream..
1431 * Contrary to the ttm_eu version of this function, it takes only
1432 * a single buffer object instead of a list, and it also doesn't
1433 * unreserve the buffer object, which needs to be done separately.
1435 void vmw_fence_single_bo(struct ttm_buffer_object
*bo
,
1436 struct vmw_fence_obj
*fence
)
1438 struct ttm_bo_device
*bdev
= bo
->bdev
;
1440 struct vmw_private
*dev_priv
=
1441 container_of(bdev
, struct vmw_private
, bdev
);
1443 if (fence
== NULL
) {
1444 vmw_execbuf_fence_commands(NULL
, dev_priv
, &fence
, NULL
);
1445 reservation_object_add_excl_fence(bo
->resv
, &fence
->base
);
1446 fence_put(&fence
->base
);
1448 reservation_object_add_excl_fence(bo
->resv
, &fence
->base
);
1452 * vmw_resource_move_notify - TTM move_notify_callback
1454 * @bo: The TTM buffer object about to move.
1455 * @mem: The struct ttm_mem_reg indicating to what memory
1456 * region the move is taking place.
1458 * Evicts the Guest Backed hardware resource if the backup
1459 * buffer is being moved out of MOB memory.
1460 * Note that this function should not race with the resource
1461 * validation code as long as it accesses only members of struct
1462 * resource that remain static while bo::res is !NULL and
1463 * while we have @bo reserved. struct resource::backup is *not* a
1464 * static member. The resource validation code will take care
1465 * to set @bo::res to NULL, while having @bo reserved when the
1466 * buffer is no longer bound to the resource, so @bo:res can be
1467 * used to determine whether there is a need to unbind and whether
1468 * it is safe to unbind.
1470 void vmw_resource_move_notify(struct ttm_buffer_object
*bo
,
1471 struct ttm_mem_reg
*mem
)
1473 struct vmw_dma_buffer
*dma_buf
;
1478 if (bo
->destroy
!= vmw_dmabuf_bo_free
&&
1479 bo
->destroy
!= vmw_user_dmabuf_destroy
)
1482 dma_buf
= container_of(bo
, struct vmw_dma_buffer
, base
);
1484 if (mem
->mem_type
!= VMW_PL_MOB
) {
1485 struct vmw_resource
*res
, *n
;
1486 struct ttm_validate_buffer val_buf
;
1489 val_buf
.shared
= false;
1491 list_for_each_entry_safe(res
, n
, &dma_buf
->res_list
, mob_head
) {
1493 if (unlikely(res
->func
->unbind
== NULL
))
1496 (void) res
->func
->unbind(res
, true, &val_buf
);
1497 res
->backup_dirty
= true;
1498 res
->res_dirty
= false;
1499 list_del_init(&res
->mob_head
);
1502 (void) ttm_bo_wait(bo
, false, false, false);
1509 * vmw_query_readback_all - Read back cached query states
1511 * @dx_query_mob: Buffer containing the DX query MOB
1513 * Read back cached states from the device if they exist. This function
1514 * assumings binding_mutex is held.
1516 int vmw_query_readback_all(struct vmw_dma_buffer
*dx_query_mob
)
1518 struct vmw_resource
*dx_query_ctx
;
1519 struct vmw_private
*dev_priv
;
1521 SVGA3dCmdHeader header
;
1522 SVGA3dCmdDXReadbackAllQuery body
;
1526 /* No query bound, so do nothing */
1527 if (!dx_query_mob
|| !dx_query_mob
->dx_query_ctx
)
1530 dx_query_ctx
= dx_query_mob
->dx_query_ctx
;
1531 dev_priv
= dx_query_ctx
->dev_priv
;
1533 cmd
= vmw_fifo_reserve_dx(dev_priv
, sizeof(*cmd
), dx_query_ctx
->id
);
1534 if (unlikely(cmd
== NULL
)) {
1535 DRM_ERROR("Failed reserving FIFO space for "
1536 "query MOB read back.\n");
1540 cmd
->header
.id
= SVGA_3D_CMD_DX_READBACK_ALL_QUERY
;
1541 cmd
->header
.size
= sizeof(cmd
->body
);
1542 cmd
->body
.cid
= dx_query_ctx
->id
;
1544 vmw_fifo_commit(dev_priv
, sizeof(*cmd
));
1546 /* Triggers a rebind the next time affected context is bound */
1547 dx_query_mob
->dx_query_ctx
= NULL
;
1555 * vmw_query_move_notify - Read back cached query states
1557 * @bo: The TTM buffer object about to move.
1558 * @mem: The memory region @bo is moving to.
1560 * Called before the query MOB is swapped out to read back cached query
1561 * states from the device.
1563 void vmw_query_move_notify(struct ttm_buffer_object
*bo
,
1564 struct ttm_mem_reg
*mem
)
1566 struct vmw_dma_buffer
*dx_query_mob
;
1567 struct ttm_bo_device
*bdev
= bo
->bdev
;
1568 struct vmw_private
*dev_priv
;
1571 dev_priv
= container_of(bdev
, struct vmw_private
, bdev
);
1573 mutex_lock(&dev_priv
->binding_mutex
);
1575 dx_query_mob
= container_of(bo
, struct vmw_dma_buffer
, base
);
1576 if (mem
== NULL
|| !dx_query_mob
|| !dx_query_mob
->dx_query_ctx
) {
1577 mutex_unlock(&dev_priv
->binding_mutex
);
1581 /* If BO is being moved from MOB to system memory */
1582 if (mem
->mem_type
== TTM_PL_SYSTEM
&& bo
->mem
.mem_type
== VMW_PL_MOB
) {
1583 struct vmw_fence_obj
*fence
;
1585 (void) vmw_query_readback_all(dx_query_mob
);
1586 mutex_unlock(&dev_priv
->binding_mutex
);
1588 /* Create a fence and attach the BO to it */
1589 (void) vmw_execbuf_fence_commands(NULL
, dev_priv
, &fence
, NULL
);
1590 vmw_fence_single_bo(bo
, fence
);
1593 vmw_fence_obj_unreference(&fence
);
1595 (void) ttm_bo_wait(bo
, false, false, false);
1597 mutex_unlock(&dev_priv
->binding_mutex
);
1602 * vmw_resource_needs_backup - Return whether a resource needs a backup buffer.
1604 * @res: The resource being queried.
1606 bool vmw_resource_needs_backup(const struct vmw_resource
*res
)
1608 return res
->func
->needs_backup
;
1612 * vmw_resource_evict_type - Evict all resources of a specific type
1614 * @dev_priv: Pointer to a device private struct
1615 * @type: The resource type to evict
1617 * To avoid thrashing starvation or as part of the hibernation sequence,
1618 * try to evict all evictable resources of a specific type.
1620 static void vmw_resource_evict_type(struct vmw_private
*dev_priv
,
1621 enum vmw_res_type type
)
1623 struct list_head
*lru_list
= &dev_priv
->res_lru
[type
];
1624 struct vmw_resource
*evict_res
;
1625 unsigned err_count
= 0;
1629 write_lock(&dev_priv
->resource_lock
);
1631 if (list_empty(lru_list
))
1634 evict_res
= vmw_resource_reference(
1635 list_first_entry(lru_list
, struct vmw_resource
,
1637 list_del_init(&evict_res
->lru_head
);
1638 write_unlock(&dev_priv
->resource_lock
);
1640 ret
= vmw_resource_do_evict(evict_res
, false);
1641 if (unlikely(ret
!= 0)) {
1642 write_lock(&dev_priv
->resource_lock
);
1643 list_add_tail(&evict_res
->lru_head
, lru_list
);
1644 write_unlock(&dev_priv
->resource_lock
);
1645 if (++err_count
> VMW_RES_EVICT_ERR_COUNT
) {
1646 vmw_resource_unreference(&evict_res
);
1651 vmw_resource_unreference(&evict_res
);
1655 write_unlock(&dev_priv
->resource_lock
);
1659 * vmw_resource_evict_all - Evict all evictable resources
1661 * @dev_priv: Pointer to a device private struct
1663 * To avoid thrashing starvation or as part of the hibernation sequence,
1664 * evict all evictable resources. In particular this means that all
1665 * guest-backed resources that are registered with the device are
1666 * evicted and the OTable becomes clean.
1668 void vmw_resource_evict_all(struct vmw_private
*dev_priv
)
1670 enum vmw_res_type type
;
1672 mutex_lock(&dev_priv
->cmdbuf_mutex
);
1674 for (type
= 0; type
< vmw_res_max
; ++type
)
1675 vmw_resource_evict_type(dev_priv
, type
);
1677 mutex_unlock(&dev_priv
->cmdbuf_mutex
);
1681 * vmw_resource_pin - Add a pin reference on a resource
1683 * @res: The resource to add a pin reference on
1685 * This function adds a pin reference, and if needed validates the resource.
1686 * Having a pin reference means that the resource can never be evicted, and
1687 * its id will never change as long as there is a pin reference.
1688 * This function returns 0 on success and a negative error code on failure.
1690 int vmw_resource_pin(struct vmw_resource
*res
, bool interruptible
)
1692 struct vmw_private
*dev_priv
= res
->dev_priv
;
1695 ttm_write_lock(&dev_priv
->reservation_sem
, interruptible
);
1696 mutex_lock(&dev_priv
->cmdbuf_mutex
);
1697 ret
= vmw_resource_reserve(res
, interruptible
, false);
1699 goto out_no_reserve
;
1701 if (res
->pin_count
== 0) {
1702 struct vmw_dma_buffer
*vbo
= NULL
;
1707 ttm_bo_reserve(&vbo
->base
, interruptible
, false, false,
1709 if (!vbo
->pin_count
) {
1710 ret
= ttm_bo_validate
1712 res
->func
->backup_placement
,
1713 interruptible
, false);
1715 ttm_bo_unreserve(&vbo
->base
);
1716 goto out_no_validate
;
1720 /* Do we really need to pin the MOB as well? */
1721 vmw_bo_pin_reserved(vbo
, true);
1723 ret
= vmw_resource_validate(res
);
1725 ttm_bo_unreserve(&vbo
->base
);
1727 goto out_no_validate
;
1732 vmw_resource_unreserve(res
, false, NULL
, 0UL);
1734 mutex_unlock(&dev_priv
->cmdbuf_mutex
);
1735 ttm_write_unlock(&dev_priv
->reservation_sem
);
1741 * vmw_resource_unpin - Remove a pin reference from a resource
1743 * @res: The resource to remove a pin reference from
1745 * Having a pin reference means that the resource can never be evicted, and
1746 * its id will never change as long as there is a pin reference.
1748 void vmw_resource_unpin(struct vmw_resource
*res
)
1750 struct vmw_private
*dev_priv
= res
->dev_priv
;
1753 ttm_read_lock(&dev_priv
->reservation_sem
, false);
1754 mutex_lock(&dev_priv
->cmdbuf_mutex
);
1756 ret
= vmw_resource_reserve(res
, false, true);
1759 WARN_ON(res
->pin_count
== 0);
1760 if (--res
->pin_count
== 0 && res
->backup
) {
1761 struct vmw_dma_buffer
*vbo
= res
->backup
;
1763 ttm_bo_reserve(&vbo
->base
, false, false, false, NULL
);
1764 vmw_bo_pin_reserved(vbo
, false);
1765 ttm_bo_unreserve(&vbo
->base
);
1768 vmw_resource_unreserve(res
, false, NULL
, 0UL);
1770 mutex_unlock(&dev_priv
->cmdbuf_mutex
);
1771 ttm_read_unlock(&dev_priv
->reservation_sem
);
1775 * vmw_res_type - Return the resource type
1777 * @res: Pointer to the resource
1779 enum vmw_res_type
vmw_res_type(const struct vmw_resource
*res
)
1781 return res
->func
->res_type
;