From: Chris Wilson Date: Mon, 20 Nov 2017 10:20:02 +0000 (+0000) Subject: drm/i915: Automatic i915_switch_context for legacy X-Git-Tag: v4.19~298^2~46^2~1063 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3fef5cda970124a15c553c1672d800e40fc08a9e;p=platform%2Fkernel%2Flinux-rpi3.git drm/i915: Automatic i915_switch_context for legacy During request construction, after pinning the context we know whether or not we have to emit a context switch. So move this common operation from every caller into i915_gem_request_alloc() itself. v2: Always submit the request if we emitted some commands during request construction, as typically it also involves changes in global state. Signed-off-by: Chris Wilson Reviewed-by: Mika Kuoppala Link: https://patchwork.freedesktop.org/patch/msgid/20171120102002.22254-2-chris@chris-wilson.co.uk --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 61ba321..e07eb0b 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -5045,7 +5045,7 @@ static int __intel_engines_record_defaults(struct drm_i915_private *i915) goto out_ctx; } - err = i915_switch_context(rq); + err = 0; if (engine->init_context) err = engine->init_context(rq); diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index 2db0406..c1efbaf 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -842,8 +842,7 @@ int i915_switch_context(struct drm_i915_gem_request *req) struct intel_engine_cs *engine = req->engine; lockdep_assert_held(&req->i915->drm.struct_mutex); - if (i915_modparams.enable_execlists) - return 0; + GEM_BUG_ON(i915_modparams.enable_execlists); if (!req->ctx->engine[engine->id].state) { struct i915_gem_context *to = req->ctx; @@ -899,7 +898,6 @@ int i915_gem_switch_to_kernel_context(struct drm_i915_private *dev_priv) for_each_engine(engine, dev_priv, id) { struct drm_i915_gem_request *req; - int ret; if (engine_has_idle_kernel_context(engine)) continue; @@ -922,10 +920,7 @@ int i915_gem_switch_to_kernel_context(struct drm_i915_private *dev_priv) GFP_KERNEL); } - ret = i915_switch_context(req); i915_add_request(req); - if (ret) - return ret; } return 0; diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index b789578..14d9e61 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -1111,10 +1111,6 @@ static int __reloc_gpu_alloc(struct i915_execbuffer *eb, if (err) goto err_request; - err = i915_switch_context(rq); - if (err) - goto err_request; - err = eb->engine->emit_bb_start(rq, batch->node.start, PAGE_SIZE, cache->gen > 5 ? 0 : I915_DISPATCH_SECURE); @@ -1960,10 +1956,6 @@ static int eb_submit(struct i915_execbuffer *eb) if (err) return err; - err = i915_switch_context(eb->request); - if (err) - return err; - if (eb->args->flags & I915_EXEC_GEN7_SOL_RESET) { err = i915_reset_gen7_sol_offsets(eb->request); if (err) diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c index 91eae1b..86e2346 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.c +++ b/drivers/gpu/drm/i915/i915_gem_request.c @@ -624,6 +624,10 @@ i915_gem_request_alloc(struct intel_engine_cs *engine, if (ret) goto err_unpin; + ret = intel_ring_wait_for_space(ring, MIN_SPACE_FOR_ADD_REQUEST); + if (ret) + goto err_unreserve; + /* Move the oldest request to the slab-cache (if not in use!) */ req = list_first_entry_or_null(&engine->timeline->requests, typeof(*req), link); diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c index 0f48e66..fd15009 100644 --- a/drivers/gpu/drm/i915/i915_perf.c +++ b/drivers/gpu/drm/i915/i915_perf.c @@ -1726,10 +1726,9 @@ static int gen8_switch_to_updated_kernel_context(struct drm_i915_private *dev_pr GFP_KERNEL); } - ret = i915_switch_context(req); i915_add_request(req); - return ret; + return 0; } /* diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 12e734b..be98868 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1592,6 +1592,10 @@ static int ring_request_alloc(struct drm_i915_gem_request *request) if (ret) return ret; + ret = i915_switch_context(request); + if (ret) + return ret; + request->reserved_space -= LEGACY_REQUEST_SIZE; return 0; } diff --git a/drivers/gpu/drm/i915/selftests/huge_pages.c b/drivers/gpu/drm/i915/selftests/huge_pages.c index 159a2cb..db7a0a1 100644 --- a/drivers/gpu/drm/i915/selftests/huge_pages.c +++ b/drivers/gpu/drm/i915/selftests/huge_pages.c @@ -989,13 +989,9 @@ static int gpu_write(struct i915_vma *vma, i915_vma_unpin(batch); i915_vma_close(batch); - err = i915_switch_context(rq); - if (err) - goto err_request; - - err = rq->engine->emit_bb_start(rq, - batch->node.start, batch->node.size, - flags); + err = engine->emit_bb_start(rq, + batch->node.start, batch->node.size, + flags); if (err) goto err_request; diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/selftests/i915_gem_context.c index 4ff30b9..09340b3 100644 --- a/drivers/gpu/drm/i915/selftests/i915_gem_context.c +++ b/drivers/gpu/drm/i915/selftests/i915_gem_context.c @@ -158,10 +158,6 @@ static int gpu_fill(struct drm_i915_gem_object *obj, goto err_batch; } - err = i915_switch_context(rq); - if (err) - goto err_request; - flags = 0; if (INTEL_GEN(vm->i915) <= 5) flags |= I915_DISPATCH_SECURE; diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_request.c b/drivers/gpu/drm/i915/selftests/i915_gem_request.c index d7bf53f..647bf2b 100644 --- a/drivers/gpu/drm/i915/selftests/i915_gem_request.c +++ b/drivers/gpu/drm/i915/selftests/i915_gem_request.c @@ -459,10 +459,6 @@ empty_request(struct intel_engine_cs *engine, if (IS_ERR(request)) return request; - err = i915_switch_context(request); - if (err) - goto out_request; - err = engine->emit_bb_start(request, batch->node.start, batch->node.size, @@ -671,9 +667,6 @@ static int live_all_engines(void *arg) goto out_request; } - err = i915_switch_context(request[id]); - GEM_BUG_ON(err); - err = engine->emit_bb_start(request[id], batch->node.start, batch->node.size, @@ -790,9 +783,6 @@ static int live_sequential_engines(void *arg) } } - err = i915_switch_context(request[id]); - GEM_BUG_ON(err); - err = engine->emit_bb_start(request[id], batch->node.start, batch->node.size, diff --git a/drivers/gpu/drm/i915/selftests/intel_hangcheck.c b/drivers/gpu/drm/i915/selftests/intel_hangcheck.c index 145bdc2..1bbb8c4 100644 --- a/drivers/gpu/drm/i915/selftests/intel_hangcheck.c +++ b/drivers/gpu/drm/i915/selftests/intel_hangcheck.c @@ -114,10 +114,6 @@ static int emit_recurse_batch(struct hang *h, if (err) goto unpin_vma; - err = i915_switch_context(rq); - if (err) - goto unpin_hws; - i915_vma_move_to_active(vma, rq, 0); if (!i915_gem_object_has_active_reference(vma->obj)) { i915_gem_object_get(vma->obj); @@ -169,7 +165,6 @@ static int emit_recurse_batch(struct hang *h, err = rq->engine->emit_bb_start(rq, vma->node.start, PAGE_SIZE, flags); -unpin_hws: i915_vma_unpin(hws); unpin_vma: i915_vma_unpin(vma);