Commit 7f4c3377 authored by Zack Rusin's avatar Zack Rusin
Browse files

drm/vmwgfx: Write the driver id registers 



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: default avatarZack Rusin <zackr@vmware.com>
Reviewed-by: default avatarMartin Krastev <krastevm@vmware.com>
Reviewed-by: default avatarMaaz Mombasawala <mombasawalam@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221022040236.616490-2-zack@kde.org
parent 977d97f1

drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

+34 −9
Original line number Diff line number Diff line
@@ -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);