diff options
| author | Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2012-12-19 11:13:08 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-12-19 11:25:10 +0100 |
| commit | fca26bb45375266d9d9b8b4b57fee905ac38fe3c (patch) | |
| tree | 910b86c16c7d5d49180c6a85d4d548f753143d89 /drivers/gpu/drm/i915/i915_gem.c | |
| parent | ba1a7067c00f4cbdd99b00a570ff072639ae59f2 (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/drm/i915/i915_gem.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 32 |
1 files changed, 29 insertions, 3 deletions
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; |