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drm/vmwgfx: Write the driver id registers

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[ Upstream commit 7f4c33778686cc2d34cb4ef65b4265eea874c159 ]

Driver id registers are a new mechanism in the svga device to hint to the
device which driver is running. This should not change device behavior
in any way, but might be convenient to work-around specific bugs
in guest drivers.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: Martin Krastev <krastevm@vmware.com>
Reviewed-by: Maaz Mombasawala <mombasawalam@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221022040236.616490-2-zack@kde.org
Stable-dep-of: a309c7194e8a ("drm/vmwgfx: Remove rcu locks from user resources")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zack Rusin
2022-10-22 00:02:20 -04:00
committed by Greg Kroah-Hartman
parent 96a9873188
commit 2f3313c555
1 changed files with 34 additions and 9 deletions
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43
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
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@@ -25,10 +25,13 @@
*
**************************************************************************/
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/cc_platform.h>
#include "vmwgfx_drv.h"
#include "vmwgfx_devcaps.h"
#include "vmwgfx_mksstat.h"
#include "vmwgfx_binding.h"
#include "ttm_object.h"
#include <drm/drm_aperture.h>
#include <drm/drm_drv.h>
@@ -41,11 +44,11 @@
#include <drm/ttm/ttm_placement.h>
#include <generated/utsrelease.h>
#include "ttm_object.h"
#include "vmwgfx_binding.h"
#include "vmwgfx_devcaps.h"
#include "vmwgfx_drv.h"
#include "vmwgfx_mksstat.h"
#include <linux/cc_platform.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/version.h>
#define VMWGFX_DRIVER_DESC "Linux drm driver for VMware graphics devices"
@@ -806,6 +809,27 @@ static int vmw_detect_version(struct vmw_private *dev)
return 0;
}
static void vmw_write_driver_id(struct vmw_private *dev)
{
if ((dev->capabilities2 & SVGA_CAP2_DX2) != 0) {
vmw_write(dev, SVGA_REG_GUEST_DRIVER_ID,
SVGA_REG_GUEST_DRIVER_ID_LINUX);
vmw_write(dev, SVGA_REG_GUEST_DRIVER_VERSION1,
LINUX_VERSION_MAJOR << 24 |
LINUX_VERSION_PATCHLEVEL << 16 |
LINUX_VERSION_SUBLEVEL);
vmw_write(dev, SVGA_REG_GUEST_DRIVER_VERSION2,
VMWGFX_DRIVER_MAJOR << 24 |
VMWGFX_DRIVER_MINOR << 16 |
VMWGFX_DRIVER_PATCHLEVEL);
vmw_write(dev, SVGA_REG_GUEST_DRIVER_VERSION3, 0);
vmw_write(dev, SVGA_REG_GUEST_DRIVER_ID,
SVGA_REG_GUEST_DRIVER_ID_SUBMIT);
}
}
static int vmw_driver_load(struct vmw_private *dev_priv, u32 pci_id)
{
int ret;
@@ -1091,6 +1115,7 @@ static int vmw_driver_load(struct vmw_private *dev_priv, u32 pci_id)
vmw_host_printf("vmwgfx: Module Version: %d.%d.%d (kernel: %s)",
VMWGFX_DRIVER_MAJOR, VMWGFX_DRIVER_MINOR,
VMWGFX_DRIVER_PATCHLEVEL, UTS_RELEASE);
vmw_write_driver_id(dev_priv);
if (dev_priv->enable_fb) {
vmw_fifo_resource_inc(dev_priv);