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drm/i915: Update alloc_request to return the allocated request

Browse source 
The alloc_request() function does not actually return the newly allocated
request. Instead, it must be pulled from ring->outstanding_lazy_request. This
patch fixes this so that code can create a request and start using it knowing
exactly which request it actually owns.

v2: Updated for new i915_gem_request_alloc() scheme.

For: VIZ-5115
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Tomas Elf <tomas.elf@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
John Harrison 2015-05-29 17:43:29 +01:00 committed by Daniel Vetter
parent adeca76d8e
commit 217e46b576
5 changed files with 15 additions and 7 deletions
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3
drivers/gpu/drm/i915/i915_drv.h
View file

@ -2206,7 +2206,8 @@ struct drm_i915_gem_request {
};
int i915_gem_request_alloc(struct intel_engine_cs *ring,
struct intel_context *ctx);
struct intel_context *ctx,
struct drm_i915_gem_request **req_out);
void i915_gem_request_cancel(struct drm_i915_gem_request *req);
void i915_gem_request_free(struct kref *req_ref);

10
drivers/gpu/drm/i915/i915_gem.c
View file

@ -2634,13 +2634,17 @@ void i915_gem_request_free(struct kref *req_ref)
}
int i915_gem_request_alloc(struct intel_engine_cs *ring,
struct intel_context *ctx)
struct intel_context *ctx,
struct drm_i915_gem_request **req_out)
{
struct drm_i915_private *dev_priv = to_i915(ring->dev);
struct drm_i915_gem_request *req;
int ret;
if (ring->outstanding_lazy_request)
if (!req_out)
return -EINVAL;
if ((*req_out = ring->outstanding_lazy_request) != NULL)
return 0;
req = kmem_cache_zalloc(dev_priv->requests, GFP_KERNEL);
@ -2686,7 +2690,7 @@ int i915_gem_request_alloc(struct intel_engine_cs *ring,
*/
intel_ring_reserved_space_reserve(req->ringbuf, MIN_SPACE_FOR_ADD_REQUEST);
ring->outstanding_lazy_request = req;
*req_out = ring->outstanding_lazy_request = req;
return 0;
err:

3
drivers/gpu/drm/i915/i915_gem_execbuffer.c
View file

@ -1415,6 +1415,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
struct i915_address_space *vm;
struct i915_execbuffer_params params_master; /* XXX: will be removed later */
struct i915_execbuffer_params *params = &params_master;
struct drm_i915_gem_request *request;
const u32 ctx_id = i915_execbuffer2_get_context_id(*args);
u32 dispatch_flags;
int ret;
@ -1614,7 +1615,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
params->batch_obj_vm_offset = i915_gem_obj_offset(batch_obj, vm);
/* Allocate a request for this batch buffer nice and early. */
ret = i915_gem_request_alloc(ring, ctx);
ret = i915_gem_request_alloc(ring, ctx, &request);
if (ret)
goto err_batch_unpin;

3
drivers/gpu/drm/i915/intel_lrc.c
View file

@ -818,6 +818,7 @@ static int logical_ring_prepare(struct intel_ringbuffer *ringbuf,
static int intel_logical_ring_begin(struct intel_ringbuffer *ringbuf,
struct intel_context *ctx, int num_dwords)
{
struct drm_i915_gem_request *req;
struct intel_engine_cs *ring = ringbuf->ring;
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
@ -833,7 +834,7 @@ static int intel_logical_ring_begin(struct intel_ringbuffer *ringbuf,
return ret;
/* Preallocate the olr before touching the ring */
ret = i915_gem_request_alloc(ring, ctx);
ret = i915_gem_request_alloc(ring, ctx, &req);
if (ret)
return ret;

3
drivers/gpu/drm/i915/intel_ringbuffer.c
View file

@ -2277,6 +2277,7 @@ static int __intel_ring_prepare(struct intel_engine_cs *ring, int bytes)
int intel_ring_begin(struct intel_engine_cs *ring,
int num_dwords)
{
struct drm_i915_gem_request *req;
struct drm_i915_private *dev_priv = ring->dev->dev_private;
int ret;
@ -2290,7 +2291,7 @@ int intel_ring_begin(struct intel_engine_cs *ring,
return ret;
/* Preallocate the olr before touching the ring */
ret = i915_gem_request_alloc(ring, ring->default_context);
ret = i915_gem_request_alloc(ring, ring->default_context, &req);
if (ret)
return ret;