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drm/vmwgfx: Don't refcount cotable lookups during command buffer validation

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The typical pattern of these lookups are
-Lookup
-Put on validate list if not already there.
-Unreference
And since we are the exclusive user of the context during lookup time,
we can be sure that the resource will stay alive during the sequence.
So avoid taking a reference during lookup, and also avoid unreferencing
when done. There are two users outside of command buffer validation and
those are refcounted explicitly.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
This commit is contained in:
Thomas Hellstrom 2018-09-26 16:29:49 +02:00
parent 508108ea27
commit 1b9a01d62c
4 changed files with 6 additions and 10 deletions
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5
drivers/gpu/drm/vmwgfx/vmwgfx_context.c
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@ -861,9 +861,8 @@ struct vmw_resource *vmw_context_cotable(struct vmw_resource *ctx,
if (cotable_type >= SVGA_COTABLE_DX10_MAX)
return ERR_PTR(-EINVAL);
return vmw_resource_reference
(container_of(ctx, struct vmw_user_context, res)->
cotables[cotable_type]);
return container_of(ctx, struct vmw_user_context, res)->
cotables[cotable_type];
}
/**

5
drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
View File

@ -372,7 +372,6 @@ static int vmw_resource_context_res_add(struct vmw_private *dev_priv,
continue;
ret = vmw_resource_val_add(sw_context, res);
vmw_resource_unreference(&res);
if (unlikely(ret != 0))
return ret;
}
@ -1266,7 +1265,6 @@ static int vmw_cmd_dx_define_query(struct vmw_private *dev_priv,
cotable_res = vmw_context_cotable(ctx_node->ctx, SVGA_COTABLE_DXQUERY);
ret = vmw_cotable_notify(cotable_res, cmd->q.queryId);
vmw_resource_unreference(&cotable_res);
return ret;
}
@ -2578,7 +2576,6 @@ static int vmw_cmd_dx_view_define(struct vmw_private *dev_priv,
res = vmw_context_cotable(ctx_node->ctx, vmw_view_cotables[view_type]);
ret = vmw_cotable_notify(res, cmd->defined_id);
vmw_resource_unreference(&res);
if (unlikely(ret != 0))
return ret;
@ -2675,7 +2672,6 @@ static int vmw_cmd_dx_so_define(struct vmw_private *dev_priv,
res = vmw_context_cotable(ctx_node->ctx, vmw_so_cotables[so_type]);
cmd = container_of(header, typeof(*cmd), header);
ret = vmw_cotable_notify(res, cmd->defined_id);
vmw_resource_unreference(&res);
return ret;
}
@ -2806,7 +2802,6 @@ static int vmw_cmd_dx_define_shader(struct vmw_private *dev_priv,
res = vmw_context_cotable(ctx_node->ctx, SVGA_COTABLE_DXSHADER);
ret = vmw_cotable_notify(res, cmd->body.shaderId);
vmw_resource_unreference(&res);
if (ret)
return ret;

3
drivers/gpu/drm/vmwgfx/vmwgfx_shader.c
View File

@ -636,7 +636,8 @@ int vmw_dx_shader_add(struct vmw_cmdbuf_res_manager *man,
res = &shader->res;
shader->ctx = ctx;
shader->cotable = vmw_context_cotable(ctx, SVGA_COTABLE_DXSHADER);
shader->cotable = vmw_resource_reference
(vmw_context_cotable(ctx, SVGA_COTABLE_DXSHADER));
shader->id = user_key;
shader->committed = false;
INIT_LIST_HEAD(&shader->cotable_head);

3
drivers/gpu/drm/vmwgfx/vmwgfx_so.c
View File

@ -366,7 +366,8 @@ int vmw_view_add(struct vmw_cmdbuf_res_manager *man,
res = &view->res;
view->ctx = ctx;
view->srf = vmw_resource_reference(srf);
view->cotable = vmw_context_cotable(ctx, vmw_view_cotables[view_type]);
view->cotable = vmw_resource_reference
(vmw_context_cotable(ctx, vmw_view_cotables[view_type]));
view->view_type = view_type;
view->view_id = user_key;
view->cmd_size = cmd_size;