From: Chris Wilson Date: Thu, 4 Aug 2016 06:52:32 +0000 (+0100) Subject: drm/i915: Refactor blocking waits X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8cac6f6c415bcd559db2f5c05c1bd76d7e378f67;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git drm/i915: Refactor blocking waits Tidy up the for loops that handle waiting for read/write vs read-only access. Signed-off-by: Chris Wilson Reviewed-by: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/1470293567-10811-13-git-send-email-chris@chris-wilson.co.uk --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 2b6199c53c80..2c5a818d9e6c 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1339,6 +1339,23 @@ put_rpm: return ret; } +static void +i915_gem_object_retire_request(struct drm_i915_gem_object *obj, + struct drm_i915_gem_request *req) +{ + int idx = req->engine->id; + + if (i915_gem_active_peek(&obj->last_read[idx], + &obj->base.dev->struct_mutex) == req) + i915_gem_object_retire__read(obj, idx); + else if (i915_gem_active_peek(&obj->last_write, + &obj->base.dev->struct_mutex) == req) + i915_gem_object_retire__write(obj); + + if (!i915_reset_in_progress(&req->i915->gpu_error)) + i915_gem_request_retire_upto(req); +} + /** * Ensures that all rendering to the object has completed and the object is * safe to unbind from the GTT or access from the CPU. @@ -1349,39 +1366,34 @@ int i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj, bool readonly) { - struct drm_i915_gem_request *request; struct reservation_object *resv; - int ret, i; + struct i915_gem_active *active; + unsigned long active_mask; + int idx, ret; - if (readonly) { - request = i915_gem_active_peek(&obj->last_write, - &obj->base.dev->struct_mutex); - if (request) { - ret = i915_wait_request(request); - if (ret) - return ret; + lockdep_assert_held(&obj->base.dev->struct_mutex); - i = request->engine->id; - if (i915_gem_active_peek(&obj->last_read[i], - &obj->base.dev->struct_mutex) == request) - i915_gem_object_retire__read(obj, i); - else - i915_gem_object_retire__write(obj); - } + if (!readonly) { + active = obj->last_read; + active_mask = obj->active; } else { - for (i = 0; i < I915_NUM_ENGINES; i++) { - request = i915_gem_active_peek(&obj->last_read[i], - &obj->base.dev->struct_mutex); - if (!request) - continue; + active_mask = 1; + active = &obj->last_write; + } - ret = i915_wait_request(request); - if (ret) - return ret; + for_each_active(active_mask, idx) { + struct drm_i915_gem_request *request; - i915_gem_object_retire__read(obj, i); - } - GEM_BUG_ON(obj->active); + request = i915_gem_active_peek(&active[idx], + &obj->base.dev->struct_mutex); + if (!request) + continue; + + ret = i915_wait_request(request); + if (ret) + return ret; + + i915_gem_object_retire_request(obj, request); } resv = i915_gem_object_get_dmabuf_resv(obj); @@ -1397,23 +1409,6 @@ i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj, return 0; } -static void -i915_gem_object_retire_request(struct drm_i915_gem_object *obj, - struct drm_i915_gem_request *req) -{ - int idx = req->engine->id; - - if (i915_gem_active_peek(&obj->last_read[idx], - &obj->base.dev->struct_mutex) == req) - i915_gem_object_retire__read(obj, idx); - else if (i915_gem_active_peek(&obj->last_write, - &obj->base.dev->struct_mutex) == req) - i915_gem_object_retire__write(obj); - - if (!i915_reset_in_progress(&req->i915->gpu_error)) - i915_gem_request_retire_upto(req); -} - /* A nonblocking variant of the above wait. This is a highly dangerous routine * as the object state may change during this call. */ @@ -1425,34 +1420,31 @@ i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object *obj, struct drm_device *dev = obj->base.dev; struct drm_i915_private *dev_priv = to_i915(dev); struct drm_i915_gem_request *requests[I915_NUM_ENGINES]; + struct i915_gem_active *active; + unsigned long active_mask; int ret, i, n = 0; BUG_ON(!mutex_is_locked(&dev->struct_mutex)); BUG_ON(!dev_priv->mm.interruptible); - if (!obj->active) + active_mask = obj->active; + if (!active_mask) return 0; - if (readonly) { - struct drm_i915_gem_request *req; - - req = i915_gem_active_get(&obj->last_write, - &obj->base.dev->struct_mutex); - if (req == NULL) - return 0; - - requests[n++] = req; + if (!readonly) { + active = obj->last_read; } else { - for (i = 0; i < I915_NUM_ENGINES; i++) { - struct drm_i915_gem_request *req; + active_mask = 1; + active = &obj->last_write; + } - req = i915_gem_active_get(&obj->last_read[i], - &obj->base.dev->struct_mutex); - if (req == NULL) - continue; + for_each_active(active_mask, i) { + struct drm_i915_gem_request *req; + req = i915_gem_active_get(&active[i], + &obj->base.dev->struct_mutex); + if (req) requests[n++] = req; - } } mutex_unlock(&dev->struct_mutex); @@ -2934,33 +2926,33 @@ int i915_gem_object_sync(struct drm_i915_gem_object *obj, struct drm_i915_gem_request *to) { - const bool readonly = obj->base.pending_write_domain == 0; - struct drm_i915_gem_request *requests[I915_NUM_ENGINES]; - int ret, i, n; + struct i915_gem_active *active; + unsigned long active_mask; + int idx; - if (!obj->active) - return 0; + lockdep_assert_held(&obj->base.dev->struct_mutex); - n = 0; - if (readonly) { - struct drm_i915_gem_request *req; + active_mask = obj->active; + if (!active_mask) + return 0; - req = i915_gem_active_peek(&obj->last_write, - &obj->base.dev->struct_mutex); - if (req) - requests[n++] = req; + if (obj->base.pending_write_domain) { + active = obj->last_read; } else { - for (i = 0; i < I915_NUM_ENGINES; i++) { - struct drm_i915_gem_request *req; - - req = i915_gem_active_peek(&obj->last_read[i], - &obj->base.dev->struct_mutex); - if (req) - requests[n++] = req; - } + active_mask = 1; + active = &obj->last_write; } - for (i = 0; i < n; i++) { - ret = __i915_gem_object_sync(obj, to, requests[i]); + + for_each_active(active_mask, idx) { + struct drm_i915_gem_request *request; + int ret; + + request = i915_gem_active_peek(&active[idx], + &obj->base.dev->struct_mutex); + if (!request) + continue; + + ret = __i915_gem_object_sync(obj, to, request); if (ret) return ret; }