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drm/vmwgfx: Assign eviction priorities to resources

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TTM provides a means to assign eviction priorities to buffer object. This
means that all buffer objects with a lower priority will be evicted first
on memory pressure.
Use this to make sure surfaces and in particular non-dirty surfaces are
evicted first. Evicting in particular shaders, cotables and contexts imply
a significant performance hit on vmwgfx, so make sure these resources are
evicted last.
Some buffer objects are sub-allocated in user-space which means we can have
many resources attached to a single buffer object or resource. In that case
the buffer object is given the highest priority of the attached resources.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
This commit is contained in:
Thomas Hellstrom
2019-03-04 19:37:40 +01:00
parent 561564bea3
commit 4251fa5fc3
8 changed files with 141 additions and 20 deletions
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13
drivers/gpu/drm/vmwgfx/vmwgfx_cotable.c
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@@ -116,6 +116,8 @@ static const struct vmw_res_func vmw_cotable_func = {
.res_type = vmw_res_cotable,
.needs_backup = true,
.may_evict = true,
.prio = 3,
.dirty_prio = 3,
.type_name = "context guest backed object tables",
.backup_placement = &vmw_mob_placement,
.create = vmw_cotable_create,
@@ -307,7 +309,7 @@ static int vmw_cotable_unbind(struct vmw_resource *res,
struct ttm_buffer_object *bo = val_buf->bo;
struct vmw_fence_obj *fence;
if (list_empty(&res->mob_head))
if (!vmw_resource_mob_attached(res))
return 0;
WARN_ON_ONCE(bo->mem.mem_type != VMW_PL_MOB);
@@ -453,6 +455,7 @@ static int vmw_cotable_resize(struct vmw_resource *res, size_t new_size)
goto out_wait;
}
vmw_resource_mob_detach(res);
res->backup = buf;
res->backup_size = new_size;
vcotbl->size_read_back = cur_size_read_back;
@@ -467,12 +470,12 @@ static int vmw_cotable_resize(struct vmw_resource *res, size_t new_size)
res->backup = old_buf;
res->backup_size = old_size;
vcotbl->size_read_back = old_size_read_back;
vmw_resource_mob_attach(res);
goto out_wait;
}
vmw_resource_mob_attach(res);
/* Let go of the old mob. */
list_del(&res->mob_head);
list_add_tail(&res->mob_head, &buf->res_list);
vmw_bo_unreference(&old_buf);
res->id = vcotbl->type;
@@ -496,7 +499,7 @@ out_wait:
* is called before bind() in the validation sequence is instead used for two
* things.
* 1) Unscrub the cotable if it is scrubbed and still attached to a backup
* buffer, that is, if @res->mob_head is non-empty.
* buffer.
* 2) Resize the cotable if needed.
*/
static int vmw_cotable_create(struct vmw_resource *res)
@@ -512,7 +515,7 @@ static int vmw_cotable_create(struct vmw_resource *res)
new_size *= 2;
if (likely(new_size <= res->backup_size)) {
if (vcotbl->scrubbed && !list_empty(&res->mob_head)) {
if (vcotbl->scrubbed && vmw_resource_mob_attached(res)) {
ret = vmw_cotable_unscrub(res);
if (ret)
return ret;