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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>
This commit is contained in:
Thomas Hellstrom
2019-03-04 19:37:40 +01:00
parent 6ae8748bf7
commit a0a63940b0
8 changed files with 140 additions and 20 deletions
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8
drivers/gpu/drm/vmwgfx/vmwgfx_shader.c
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@@ -95,6 +95,8 @@ static const struct vmw_res_func vmw_gb_shader_func = {
.res_type = vmw_res_shader,
.needs_backup = true,
.may_evict = true,
.prio = 3,
.dirty_prio = 3,
.type_name = "guest backed shaders",
.backup_placement = &vmw_mob_placement,
.create = vmw_gb_shader_create,
@@ -106,7 +108,9 @@ static const struct vmw_res_func vmw_gb_shader_func = {
static const struct vmw_res_func vmw_dx_shader_func = {
.res_type = vmw_res_shader,
.needs_backup = true,
.may_evict = false,
.may_evict = true,
.prio = 3,
.dirty_prio = 3,
.type_name = "dx shaders",
.backup_placement = &vmw_mob_placement,
.create = vmw_dx_shader_create,
@@ -423,7 +427,7 @@ static int vmw_dx_shader_create(struct vmw_resource *res)
WARN_ON_ONCE(!shader->committed);
if (!list_empty(&res->mob_head)) {
if (vmw_resource_mob_attached(res)) {
mutex_lock(&dev_priv->binding_mutex);
ret = vmw_dx_shader_unscrub(res);
mutex_unlock(&dev_priv->binding_mutex);