diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 38 |
1 files changed, 31 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 2b5c7ad9e64..b0ff5c44e61 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1595,18 +1595,32 @@ try_again: /* None available, try to steal one or wait for a user to finish */ if (i == dev_priv->num_fence_regs) { + uint32_t seqno = dev_priv->mm.next_gem_seqno; loff_t offset; if (avail == 0) return -ENOMEM; - /* Could try to use LRU here instead... */ for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) { + uint32_t this_seqno; + reg = &dev_priv->fence_regs[i]; old_obj_priv = reg->obj->driver_private; - if (!old_obj_priv->pin_count) + + if (old_obj_priv->pin_count) + continue; + + /* i915 uses fences for GPU access to tiled buffers */ + if (IS_I965G(dev) || !old_obj_priv->active) break; + + /* find the seqno of the first available fence */ + this_seqno = old_obj_priv->last_rendering_seqno; + if (this_seqno != 0 && + reg->obj->write_domain == 0 && + i915_seqno_passed(seqno, this_seqno)) + seqno = this_seqno; } /* @@ -1614,15 +1628,25 @@ try_again: * objects to finish before trying again. */ if (i == dev_priv->num_fence_regs) { - ret = i915_gem_object_set_to_gtt_domain(reg->obj, 0); - if (ret) { - WARN(ret != -ERESTARTSYS, - "switch to GTT domain failed: %d\n", ret); - return ret; + if (seqno == dev_priv->mm.next_gem_seqno) { + i915_gem_flush(dev, + I915_GEM_GPU_DOMAINS, + I915_GEM_GPU_DOMAINS); + seqno = i915_add_request(dev, + I915_GEM_GPU_DOMAINS); + if (seqno == 0) + return -ENOMEM; } + + ret = i915_wait_request(dev, seqno); + if (ret) + return ret; goto try_again; } + BUG_ON(old_obj_priv->active || + (reg->obj->write_domain & I915_GEM_GPU_DOMAINS)); + /* * Zap this virtual mapping so we can set up a fence again * for this object next time we need it. |