As we can make use of the ability to insert semaphores to serialise
accessing buffers between ring elsewhere, separate out the function from
the execbuffer code and make it generic.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_drv.h | 5 +++
drivers/gpu/drm/i915/i915_gem.c | 40 ++++++++++++++++++++++++++
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 43 +---------------------------
3 files changed, 46 insertions(+), 42 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 76e111c..30fbf3b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -940,6 +940,7 @@ enum intel_chip_family {
#define HAS_BSD(dev) (INTEL_INFO(dev)->has_bsd_ring)
#define HAS_BLT(dev) (INTEL_INFO(dev)->has_blt_ring)
#define I915_NEED_GFX_HWS(dev) (INTEL_INFO(dev)->need_gfx_hws)
+#define HAS_GPU_SEMAPHORES(dev) (INTEL_INFO(dev)->gen >= 6 && i915_semaphores)
#define HAS_OVERLAY(dev) (INTEL_INFO(dev)->has_overlay)
#define OVERLAY_NEEDS_PHYSICAL(dev)
(INTEL_INFO(dev)->overlay_needs_physical)
@@ -1198,6 +1199,10 @@ void i915_gem_detach_phys_object(struct drm_device *dev,
void i915_gem_free_all_phys_object(struct drm_device *dev);
void i915_gem_release(struct drm_device *dev, struct drm_file *file);
+int __must_check
+i915_gem_object_move_to_ring(struct drm_i915_gem_object *obj,
+ struct intel_ring_buffer *to);
+
uint32_t
i915_gem_get_unfenced_gtt_alignment(struct drm_i915_gem_object *obj);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 58e77d6..801496a 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1658,6 +1658,46 @@ i915_gem_object_put_pages_gtt(struct drm_i915_gem_object
*obj)
obj->pages = NULL;
}
+int
+i915_gem_object_move_to_ring(struct drm_i915_gem_object *obj,
+ struct intel_ring_buffer *to)
+{
+ struct intel_ring_buffer *from = obj->ring;
+ u32 seqno;
+ int ret, idx;
+
+ if (from == NULL || to == from)
+ return 0;
+
+ if (to == NULL || !HAS_GPU_SEMAPHORES(obj->base.dev))
+ return i915_gem_object_wait_rendering(obj);
+
+ idx = intel_ring_sync_index(from, to);
+
+ seqno = obj->last_rendering_seqno;
+ if (seqno <= from->sync_seqno[idx])
+ return 0;
+
+ if (seqno == from->outstanding_lazy_request) {
+ struct drm_i915_gem_request *request;
+
+ request = kzalloc(sizeof(*request), GFP_KERNEL);
+ if (request == NULL)
+ return -ENOMEM;
+
+ ret = i915_add_request(from, NULL, request);
+ if (ret) {
+ kfree(request);
+ return ret;
+ }
+
+ seqno = request->seqno;
+ }
+
+ from->sync_seqno[idx] = seqno;
+ return intel_ring_sync(to, from, seqno - 1);
+}
+
void
i915_gem_object_move_to_active(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *ring,
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index b6f89f9..316603e 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -756,47 +756,6 @@ i915_gem_execbuffer_flush(struct drm_device *dev,
}
static int
-i915_gem_execbuffer_sync_rings(struct drm_i915_gem_object *obj,
- struct intel_ring_buffer *to)
-{
- struct intel_ring_buffer *from = obj->ring;
- u32 seqno;
- int ret, idx;
-
- if (from == NULL || to == from)
- return 0;
-
- /* XXX gpu semaphores are implicated in various hard hangs on SNB */
- if (INTEL_INFO(obj->base.dev)->gen < 6 || !i915_semaphores)
- return i915_gem_object_wait_rendering(obj);
-
- idx = intel_ring_sync_index(from, to);
-
- seqno = obj->last_rendering_seqno;
- if (seqno <= from->sync_seqno[idx])
- return 0;
-
- if (seqno == from->outstanding_lazy_request) {
- struct drm_i915_gem_request *request;
-
- request = kzalloc(sizeof(*request), GFP_KERNEL);
- if (request == NULL)
- return -ENOMEM;
-
- ret = i915_add_request(from, NULL, request);
- if (ret) {
- kfree(request);
- return ret;
- }
-
- seqno = request->seqno;
- }
-
- from->sync_seqno[idx] = seqno;
- return intel_ring_sync(to, from, seqno - 1);
-}
-
-static int
i915_gem_execbuffer_wait_for_flips(struct intel_ring_buffer *ring, u32 flips)
{
u32 plane, flip_mask;
@@ -857,7 +816,7 @@ i915_gem_execbuffer_move_to_gpu(struct intel_ring_buffer
*ring,
}
list_for_each_entry(obj, objects, exec_list) {
- ret = i915_gem_execbuffer_sync_rings(obj, ring);
+ ret = i915_gem_object_move_to_ring(obj, ring);
if (ret)
return ret;
}
--
1.7.4.1
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx
