111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
/*
|
|
* Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#include "i915_drv.h"
|
|
#include "intel_gvt.h"
|
|
|
|
/**
|
|
* DOC: Intel GVT-g host support
|
|
*
|
|
* Intel GVT-g is a graphics virtualization technology which shares the
|
|
* GPU among multiple virtual machines on a time-sharing basis. Each
|
|
* virtual machine is presented a virtual GPU (vGPU), which has equivalent
|
|
* features as the underlying physical GPU (pGPU), so i915 driver can run
|
|
* seamlessly in a virtual machine.
|
|
*
|
|
* To virtualize GPU resources GVT-g driver depends on hypervisor technology
|
|
* e.g KVM/VFIO/mdev, Xen, etc. to provide resource access trapping capability
|
|
* and be virtualized within GVT-g device module. More architectural design
|
|
* doc is available on https://01.org/group/2230/documentation-list.
|
|
*/
|
|
|
|
static bool is_supported_device(struct drm_i915_private *dev_priv)
|
|
{
|
|
if (IS_BROADWELL(dev_priv))
|
|
return true;
|
|
if (IS_SKYLAKE(dev_priv))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* intel_gvt_init - initialize GVT components
|
|
* @dev_priv: drm i915 private data
|
|
*
|
|
* This function is called at the initialization stage to create a GVT device.
|
|
*
|
|
* Returns:
|
|
* Zero on success, negative error code if failed.
|
|
*
|
|
*/
|
|
int intel_gvt_init(struct drm_i915_private *dev_priv)
|
|
{
|
|
int ret;
|
|
|
|
if (!i915.enable_gvt) {
|
|
DRM_DEBUG_DRIVER("GVT-g is disabled by kernel params\n");
|
|
return 0;
|
|
}
|
|
|
|
if (!is_supported_device(dev_priv)) {
|
|
DRM_DEBUG_DRIVER("Unsupported device. GVT-g is disabled\n");
|
|
goto bail;
|
|
}
|
|
|
|
/*
|
|
* We're not in host or fail to find a MPT module, disable GVT-g
|
|
*/
|
|
ret = intel_gvt_init_host();
|
|
if (ret) {
|
|
DRM_DEBUG_DRIVER("Not in host or MPT modules not found\n");
|
|
goto bail;
|
|
}
|
|
|
|
ret = intel_gvt_init_device(dev_priv);
|
|
if (ret) {
|
|
DRM_DEBUG_DRIVER("Fail to init GVT device\n");
|
|
goto bail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
bail:
|
|
i915.enable_gvt = 0;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* intel_gvt_cleanup - cleanup GVT components when i915 driver is unloading
|
|
* @dev_priv: drm i915 private *
|
|
*
|
|
* This function is called at the i915 driver unloading stage, to shutdown
|
|
* GVT components and release the related resources.
|
|
*/
|
|
void intel_gvt_cleanup(struct drm_i915_private *dev_priv)
|
|
{
|
|
if (!intel_gvt_active(dev_priv))
|
|
return;
|
|
|
|
intel_gvt_clean_device(dev_priv);
|
|
}
|