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drm/vmwgfx: Make user resource lookups reference-free during validation

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Make the process of looking up a user resource and adding it to the
validation list reference-free unless when it's actually added to the
validation list where a single reference is taken.
This saves two locked atomic operations per command stream buffer object
handle lookup, unless there is a lookup cache hit.

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 16:32:40 +02:00
parent 1b9a01d62c
commit e8c66efbfe
3 changed files with 190 additions and 136 deletions
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18
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
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@@ -337,8 +337,6 @@ struct vmw_ctx_validation_info;
* @last_query_ctx: Last context that submitted a query
* @needs_post_query_barrier: Whether a query barrier is needed after
* command submission
* @error_resource: Pointer to hold a reference to the resource causing
* an error
* @staged_bindings: Cached per-context binding tracker
* @staged_bindings_inuse: Whether the cached per-context binding tracker
* is in use
@@ -365,7 +363,6 @@ struct vmw_sw_context{
struct vmw_res_cache_entry res_cache[vmw_res_max];
struct vmw_resource *last_query_ctx;
bool needs_post_query_barrier;
struct vmw_resource *error_resource;
struct vmw_ctx_binding_state *staged_bindings;
bool staged_bindings_inuse;
struct list_head staged_cmd_res;
@@ -698,6 +695,12 @@ extern int vmw_user_resource_lookup_handle(
uint32_t handle,
const struct vmw_user_resource_conv *converter,
struct vmw_resource **p_res);
extern struct vmw_resource *
vmw_user_resource_noref_lookup_handle(struct vmw_private *dev_priv,
struct ttm_object_file *tfile,
uint32_t handle,
const struct vmw_user_resource_conv *
converter);
extern int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
@@ -716,6 +719,15 @@ extern int vmw_query_readback_all(struct vmw_buffer_object *dx_query_mob);
extern void vmw_resource_evict_all(struct vmw_private *dev_priv);
extern void vmw_resource_unbind_list(struct vmw_buffer_object *vbo);
/**
* vmw_user_resource_noref_release - release a user resource pointer looked up
* without reference
*/
static inline void vmw_user_resource_noref_release(void)
{
ttm_base_object_noref_release();
}
/**
* Buffer object helper functions - vmwgfx_bo.c
*/