linux-kernel - [PATCH 5.12 364/700] drm/vmwgfx: Mark a surface gpu-dirty after the SVGA3dCmdDXGenMips command

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Date:   Mon, 12 Jul 2021 08:07:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Thomas Hellstrom <thellstrom@...are.com>,
        Charmaine Lee <charmainel@...are.com>,
        Roland Scheidegger <sroland@...are.com>,
        Zack Rusin <zackr@...are.com>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 364/700] drm/vmwgfx: Mark a surface gpu-dirty after the SVGA3dCmdDXGenMips command

From: Thomas Hellstrom <thellstrom@...are.com>

[ Upstream commit 75156a887b6cea6e09d83ec19f4ebfd7c86265f0 ]

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 resources")
Signed-off-by: Thomas Hellstrom <thellstrom@...are.com>
Reviewed-by: Charmaine Lee <charmainel@...are.com>
Reviewed-by: Roland Scheidegger <sroland@...are.com>
Signed-off-by: Zack Rusin <zackr@...are.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210505035740.286923-3-zackr@vmware.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 462f17320708..0996c3282ebd 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
@@ -2759,12 +2759,24 @@ 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;
 }
 
 /**
-- 
2.30.2