[PATCH 2/6] drm/vmwgfx: Mark a surface gpu-dirty after the SVGA3dCmdDXGenMips command

[Zack Rusin]

From: Thomas Hellstrom <thellstrom at vmware.com>

The SVGA3dCmdDXGenMips command uses a shader-resource view to access
the underlying surface. Normally accesses using that view-type are not
dirtying the underlying surface, but that particular command is an
exception.
Mark the surface gpu-dirty after a SVGA3dCmdDXGenMips command has been
submitted.

This fixes the piglit getteximage-formats test run with
SVGA_FORCE_COHERENT=1

Fixes: a9f58c456e9d ("drm/vmwgfx: Be more restrictive when dirtying resource")
Signed-off-by: Thomas Hellstrom <thellstrom at vmware.com>
Reviewed-by: Charmaine Lee <charmainel at vmware.com>
Reviewed-by: Roland Scheidegger <sroland at vmware.com>
Signed-off-by: Zack Rusin <zackr at vmware.com>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
index ab752b102c9e..ca5360efa172 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
@@ -2763,12 +2763,24 @@ static int vmw_cmd_dx_genmips(struct vmw_private *dev_priv,
 {
 	VMW_DECLARE_CMD_VAR(*cmd, SVGA3dCmdDXGenMips) =
 		container_of(header, typeof(*cmd), header);
-	struct vmw_resource *ret;
+	struct vmw_resource *view;
+	struct vmw_res_cache_entry *rcache;
 
-	ret = vmw_view_id_val_add(sw_context, vmw_view_sr,
-				  cmd->body.shaderResourceViewId);
+	view = vmw_view_id_val_add(sw_context, vmw_view_sr,
+				   cmd->body.shaderResourceViewId);
+	if (IS_ERR(view))
+		return PTR_ERR(view);
 
-	return PTR_ERR_OR_ZERO(ret);
+	/*
+	 * Normally the shader-resource view is not gpu-dirtying, but for
+	 * this particular command it is...
+	 * So mark the last looked-up surface, which is the surface
+	 * the view points to, gpu-dirty.
+	 */
+	rcache = &sw_context->res_cache[vmw_res_surface];
+	vmw_validation_res_set_dirty(sw_context->ctx, rcache->private,
+				     VMW_RES_DIRTY_SET);
+	return 0;
 }
 
 /**
-- 
2.27.0