int __must_check i915_mutex_lock_interruptible(struct drm_device *dev);
int i915_gem_object_sync(struct drm_i915_gem_object *obj,
- struct intel_engine_cs *to);
+ struct intel_engine_cs *to,
+ struct drm_i915_gem_request **to_req);
void i915_vma_move_to_active(struct i915_vma *vma,
struct intel_engine_cs *ring);
int i915_gem_dumb_create(struct drm_file *file_priv,
i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
u32 alignment,
struct intel_engine_cs *pipelined,
+ struct drm_i915_gem_request **pipelined_request,
const struct i915_ggtt_view *view);
void i915_gem_object_unpin_from_display_plane(struct drm_i915_gem_object *obj,
const struct i915_ggtt_view *view);
static int
__i915_gem_object_sync(struct drm_i915_gem_object *obj,
struct intel_engine_cs *to,
- struct drm_i915_gem_request *req)
+ struct drm_i915_gem_request *from_req,
+ struct drm_i915_gem_request **to_req)
{
struct intel_engine_cs *from;
int ret;
- from = i915_gem_request_get_ring(req);
+ from = i915_gem_request_get_ring(from_req);
if (to == from)
return 0;
- if (i915_gem_request_completed(req, true))
+ if (i915_gem_request_completed(from_req, true))
return 0;
- ret = i915_gem_check_olr(req);
+ ret = i915_gem_check_olr(from_req);
if (ret)
return ret;
if (!i915_semaphore_is_enabled(obj->base.dev)) {
struct drm_i915_private *i915 = to_i915(obj->base.dev);
- ret = __i915_wait_request(req,
+ ret = __i915_wait_request(from_req,
atomic_read(&i915->gpu_error.reset_counter),
i915->mm.interruptible,
NULL,
if (ret)
return ret;
- i915_gem_object_retire_request(obj, req);
+ i915_gem_object_retire_request(obj, from_req);
} else {
int idx = intel_ring_sync_index(from, to);
- u32 seqno = i915_gem_request_get_seqno(req);
+ u32 seqno = i915_gem_request_get_seqno(from_req);
+
+ WARN_ON(!to_req);
if (seqno <= from->semaphore.sync_seqno[idx])
return 0;
- trace_i915_gem_ring_sync_to(from, to, req);
+ if (*to_req == NULL) {
+ ret = i915_gem_request_alloc(to, to->default_context, to_req);
+ if (ret)
+ return ret;
+ }
+
+ trace_i915_gem_ring_sync_to(from, to, from_req);
ret = to->semaphore.sync_to(to, from, seqno);
if (ret)
return ret;
*
* @obj: object which may be in use on another ring.
* @to: ring we wish to use the object on. May be NULL.
+ * @to_req: request we wish to use the object for. See below.
+ * This will be allocated and returned if a request is
+ * required but not passed in.
*
* This code is meant to abstract object synchronization with the GPU.
* Calling with NULL implies synchronizing the object with the CPU
* rather than a particular GPU ring. Conceptually we serialise writes
- * between engines inside the GPU. We only allow on engine to write
+ * between engines inside the GPU. We only allow one engine to write
* into a buffer at any time, but multiple readers. To ensure each has
* a coherent view of memory, we must:
*
* - If we are a write request (pending_write_domain is set), the new
* request must wait for outstanding read requests to complete.
*
+ * For CPU synchronisation (NULL to) no request is required. For syncing with
+ * rings to_req must be non-NULL. However, a request does not have to be
+ * pre-allocated. If *to_req is NULL and sync commands will be emitted then a
+ * request will be allocated automatically and returned through *to_req. Note
+ * that it is not guaranteed that commands will be emitted (because the system
+ * might already be idle). Hence there is no need to create a request that
+ * might never have any work submitted. Note further that if a request is
+ * returned in *to_req, it is the responsibility of the caller to submit
+ * that request (after potentially adding more work to it).
+ *
* Returns 0 if successful, else propagates up the lower layer error.
*/
int
i915_gem_object_sync(struct drm_i915_gem_object *obj,
- struct intel_engine_cs *to)
+ struct intel_engine_cs *to,
+ struct drm_i915_gem_request **to_req)
{
const bool readonly = obj->base.pending_write_domain == 0;
struct drm_i915_gem_request *req[I915_NUM_RINGS];
req[n++] = obj->last_read_req[i];
}
for (i = 0; i < n; i++) {
- ret = __i915_gem_object_sync(obj, to, req[i]);
+ ret = __i915_gem_object_sync(obj, to, req[i], to_req);
if (ret)
return ret;
}
i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
u32 alignment,
struct intel_engine_cs *pipelined,
+ struct drm_i915_gem_request **pipelined_request,
const struct i915_ggtt_view *view)
{
u32 old_read_domains, old_write_domain;
int ret;
- ret = i915_gem_object_sync(obj, pipelined);
+ ret = i915_gem_object_sync(obj, pipelined, pipelined_request);
if (ret)
return ret;
intel_pin_and_fence_fb_obj(struct drm_plane *plane,
struct drm_framebuffer *fb,
const struct drm_plane_state *plane_state,
- struct intel_engine_cs *pipelined)
+ struct intel_engine_cs *pipelined,
+ struct drm_i915_gem_request **pipelined_request)
{
struct drm_device *dev = fb->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
dev_priv->mm.interruptible = false;
ret = i915_gem_object_pin_to_display_plane(obj, alignment, pipelined,
- &view);
+ pipelined_request, &view);
if (ret)
goto err_interruptible;
struct intel_unpin_work *work;
struct intel_engine_cs *ring;
bool mmio_flip;
+ struct drm_i915_gem_request *request = NULL;
int ret;
/*
*/
ret = intel_pin_and_fence_fb_obj(crtc->primary, fb,
crtc->primary->state,
- mmio_flip ? i915_gem_request_get_ring(obj->last_write_req) : ring);
+ mmio_flip ? i915_gem_request_get_ring(obj->last_write_req) : ring, &request);
if (ret)
goto cleanup_pending;
intel_ring_get_request(ring));
}
+ if (request)
+ i915_add_request_no_flush(request->ring);
+
work->flip_queued_vblank = drm_crtc_vblank_count(crtc);
work->enable_stall_check = true;
cleanup_unpin:
intel_unpin_fb_obj(fb, crtc->primary->state);
cleanup_pending:
+ if (request)
+ i915_gem_request_cancel(request);
atomic_dec(&intel_crtc->unpin_work_count);
mutex_unlock(&dev->struct_mutex);
cleanup:
if (ret)
DRM_DEBUG_KMS("failed to attach phys object\n");
} else {
- ret = intel_pin_and_fence_fb_obj(plane, fb, new_state, NULL);
+ ret = intel_pin_and_fence_fb_obj(plane, fb, new_state, NULL, NULL);
}
if (ret == 0)
ret = intel_pin_and_fence_fb_obj(c->primary,
c->primary->fb,
c->primary->state,
- NULL);
+ NULL, NULL);
mutex_unlock(&dev->struct_mutex);
if (ret) {
DRM_ERROR("failed to pin boot fb on pipe %d\n",
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff