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authorMika Kuoppala <mika.kuoppala@linux.intel.com>2012-12-19 11:13:08 +0200
committerDaniel Vetter <daniel.vetter@ffwll.ch>2012-12-19 11:25:10 +0100
commitfca26bb45375266d9d9b8b4b57fee905ac38fe3c (patch)
tree910b86c16c7d5d49180c6a85d4d548f753143d89 /drivers/gpu
parentba1a7067c00f4cbdd99b00a570ff072639ae59f2 (diff)
drm/i915: Introduce i915_gem_set_seqno()
This function can be used to set the driver's next_seqno to arbitrary value. i915_gem_set_seqno() will idle the gpu, retire outstanding requests, clear the semaphore mailboxes and set the hardware status page's seqno index. Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/i915/i915_drv.h4
-rw-r--r--drivers/gpu/drm/i915/i915_gem.c32
2 files changed, 31 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 514aee895ec..b0faa9149a1 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1479,8 +1479,8 @@ i915_seqno_passed(uint32_t seq1, uint32_t seq2)
return (int32_t)(seq1 - seq2) >= 0;
}
-extern int i915_gem_get_seqno(struct drm_device *dev, u32 *seqno);
-
+int __must_check i915_gem_get_seqno(struct drm_device *dev, u32 *seqno);
+int __must_check i915_gem_set_seqno(struct drm_device *dev, u32 seqno);
int __must_check i915_gem_object_get_fence(struct drm_i915_gem_object *obj);
int __must_check i915_gem_object_put_fence(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 bb38bca0255..23b883a135d 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1926,7 +1926,7 @@ i915_gem_object_move_to_inactive(struct drm_i915_gem_object *obj)
}
static int
-i915_gem_handle_seqno_wrap(struct drm_device *dev)
+i915_gem_init_seqno(struct drm_device *dev, u32 seqno)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring;
@@ -1942,7 +1942,7 @@ i915_gem_handle_seqno_wrap(struct drm_device *dev)
/* Finally reset hw state */
for_each_ring(ring, dev_priv, i) {
- intel_ring_init_seqno(ring, 0);
+ intel_ring_init_seqno(ring, seqno);
for (j = 0; j < ARRAY_SIZE(ring->sync_seqno); j++)
ring->sync_seqno[j] = 0;
@@ -1951,6 +1951,32 @@ i915_gem_handle_seqno_wrap(struct drm_device *dev)
return 0;
}
+int i915_gem_set_seqno(struct drm_device *dev, u32 seqno)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ int ret;
+
+ if (seqno == 0)
+ return -EINVAL;
+
+ /* HWS page needs to be set less than what we
+ * will inject to ring
+ */
+ ret = i915_gem_init_seqno(dev, seqno - 1);
+ if (ret)
+ return ret;
+
+ /* Carefully set the last_seqno value so that wrap
+ * detection still works
+ */
+ dev_priv->next_seqno = seqno;
+ dev_priv->last_seqno = seqno - 1;
+ if (dev_priv->last_seqno == 0)
+ dev_priv->last_seqno--;
+
+ return 0;
+}
+
int
i915_gem_get_seqno(struct drm_device *dev, u32 *seqno)
{
@@ -1958,7 +1984,7 @@ i915_gem_get_seqno(struct drm_device *dev, u32 *seqno)
/* reserve 0 for non-seqno */
if (dev_priv->next_seqno == 0) {
- int ret = i915_gem_handle_seqno_wrap(dev);
+ int ret = i915_gem_init_seqno(dev, 0);
if (ret)
return ret;