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authorThomas Hellstrom <thellstrom@vmware.com>2010-01-16 16:05:05 +0100
committerDave Airlie <airlied@redhat.com>2010-01-25 16:04:39 +1000
commit8ba5152a3acd5914cade42a1c8c9dc58ad8d1a89 (patch)
tree7e5433d4d03d753a152a9e1eec5c6e4c6958709a /drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
parent0eaddb28d3460f13102cd82cf58af875bfb1bd53 (diff)
drm/vmwgfx: Optimize memory footprint for DMA buffers.
Use VRAM whenever there is free space for DMA buffers, but use system GMR memory if using VRAM would cause an eviction. This significantly reduces the guest system memory usage for VMs with a large amount of VRAM allocated. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c')
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
index 2e92da56740..d69caf92ffe 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
@@ -490,10 +490,29 @@ static int vmw_validate_single_buffer(struct vmw_private *dev_priv,
if (vmw_dmabuf_gmr(bo) != SVGA_GMR_NULL)
return 0;
+ /**
+ * Put BO in VRAM, only if there is space.
+ */
+
+ ret = ttm_bo_validate(bo, &vmw_vram_sys_placement, true, false);
+ if (unlikely(ret == -ERESTARTSYS))
+ return ret;
+
+ /**
+ * Otherwise, set it up as GMR.
+ */
+
+ if (vmw_dmabuf_gmr(bo) != SVGA_GMR_NULL)
+ return 0;
+
ret = vmw_gmr_bind(dev_priv, bo);
if (likely(ret == 0 || ret == -ERESTARTSYS))
return ret;
+ /**
+ * If that failed, try VRAM again, this time evicting
+ * previous contents.
+ */
ret = ttm_bo_validate(bo, &vmw_vram_placement, true, false);
return ret;