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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-05-04 10:33:08 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-05-04 11:54:43 +0100 |
| commit | 266a240bf0abf1e00e72e571f3724ec753a35f19 (patch) | |
| tree | 9420a39973e08d49658dcfd958c816a33abf5c3e /drivers/gpu/drm/i915/intel_lrc.c | |
| parent | c944a308a95ab456c9cee4df4b4fa01763b94621 (diff) | |
| download | op-kernel-dev-266a240bf0abf1e00e72e571f3724ec753a35f19.zip op-kernel-dev-266a240bf0abf1e00e72e571f3724ec753a35f19.tar.gz | |
drm/i915: Use engine->context_pin() to report the intel_ring
Since unifying ringbuffer/execlist submission to use
engine->pin_context, we ensure that the intel_ring is available before
we start constructing the request. We can therefore move the assignment
of the request->ring to the central i915_gem_request_alloc() and not
require it in every engine->request_alloc() callback. Another small step
towards simplification (of the core, but at a cost of handling error
pointers in less important callers of engine->pin_context).
v2: Rearrange a few branches to reduce impact of PTR_ERR() on gcc's code
generation.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Oscar Mateo <oscar.mateo@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Oscar Mateo <oscar.mateo@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170504093308.4137-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/intel_lrc.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lrc.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 0909549..319d9a8 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -740,8 +740,9 @@ static void execlists_schedule(struct drm_i915_gem_request *request, int prio) /* XXX Do we need to preempt to make room for us and our deps? */ } -static int execlists_context_pin(struct intel_engine_cs *engine, - struct i915_gem_context *ctx) +static struct intel_ring * +execlists_context_pin(struct intel_engine_cs *engine, + struct i915_gem_context *ctx) { struct intel_context *ce = &ctx->engine[engine->id]; unsigned int flags; @@ -750,8 +751,8 @@ static int execlists_context_pin(struct intel_engine_cs *engine, lockdep_assert_held(&ctx->i915->drm.struct_mutex); - if (ce->pin_count++) - return 0; + if (likely(ce->pin_count++)) + goto out; GEM_BUG_ON(!ce->pin_count); /* no overflow please! */ if (!ce->state) { @@ -788,7 +789,8 @@ static int execlists_context_pin(struct intel_engine_cs *engine, ce->state->obj->mm.dirty = true; i915_gem_context_get(ctx); - return 0; +out: + return ce->ring; unpin_map: i915_gem_object_unpin_map(ce->state->obj); @@ -796,7 +798,7 @@ unpin_vma: __i915_vma_unpin(ce->state); err: ce->pin_count = 0; - return ret; + return ERR_PTR(ret); } static void execlists_context_unpin(struct intel_engine_cs *engine, @@ -833,9 +835,6 @@ static int execlists_request_alloc(struct drm_i915_gem_request *request) */ request->reserved_space += EXECLISTS_REQUEST_SIZE; - GEM_BUG_ON(!ce->ring); - request->ring = ce->ring; - if (i915.enable_guc_submission) { /* * Check that the GuC has space for the request before |
