diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 58f2c467d68e..66e4ba1a16c1 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1573,6 +1573,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) spin_lock_init(&dev_priv->backlight_lock); spin_lock_init(&dev_priv->uncore.lock); spin_lock_init(&dev_priv->mm.object_stat_lock); + dev_priv->ring_index = 0; mutex_init(&dev_priv->dpio_lock); mutex_init(&dev_priv->modeset_restore_lock); @@ -1930,6 +1931,8 @@ void i915_driver_postclose(struct drm_device *dev, struct drm_file *file) { struct drm_i915_file_private *file_priv = file->driver_priv; + if (file_priv && file_priv->bsd_ring) + file_priv->bsd_ring = NULL; kfree(file_priv); } diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 5411079b2697..272aa7a6fbdb 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1473,6 +1473,8 @@ struct drm_i915_private { struct i915_dri1_state dri1; /* Old ums support infrastructure, same warning applies. */ struct i915_ums_state ums; + /* the indicator for dispatch video commands on two BSD rings */ + int ring_index; }; static inline struct drm_i915_private *to_i915(const struct drm_device *dev) @@ -1680,6 +1682,7 @@ struct drm_i915_file_private { struct i915_hw_context *private_default_ctx; atomic_t rps_wait_boost; + struct intel_ring_buffer *bsd_ring; }; /* diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index 0aa1b4cb1f6d..2f2047d4863d 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -1001,6 +1001,37 @@ i915_reset_gen7_sol_offsets(struct drm_device *dev, return 0; } +/** + * Find one BSD ring to dispatch the corresponding BSD command. + * The Ring ID is returned. + */ +static int gen8_dispatch_bsd_ring(struct drm_device *dev, + struct drm_file *file) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_i915_file_private *file_priv = file->driver_priv; + + /* Check whether the file_priv is using one ring */ + if (file_priv->bsd_ring) + return file_priv->bsd_ring->id; + else { + /* If no, use the ping-pong mechanism to select one ring */ + int ring_id; + + mutex_lock(&dev->struct_mutex); + if (dev_priv->ring_index == 0) { + ring_id = VCS; + dev_priv->ring_index = 1; + } else { + ring_id = VCS2; + dev_priv->ring_index = 0; + } + file_priv->bsd_ring = &dev_priv->ring[ring_id]; + mutex_unlock(&dev->struct_mutex); + return ring_id; + } +} + static int i915_gem_do_execbuffer(struct drm_device *dev, void *data, struct drm_file *file, @@ -1045,7 +1076,14 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data, if ((args->flags & I915_EXEC_RING_MASK) == I915_EXEC_DEFAULT) ring = &dev_priv->ring[RCS]; - else + else if ((args->flags & I915_EXEC_RING_MASK) == I915_EXEC_BSD) { + if (HAS_BSD2(dev)) { + int ring_id; + ring_id = gen8_dispatch_bsd_ring(dev, file); + ring = &dev_priv->ring[ring_id]; + } else + ring = &dev_priv->ring[VCS]; + } else ring = &dev_priv->ring[(args->flags & I915_EXEC_RING_MASK) - 1]; if (!intel_ring_initialized(ring)) {