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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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50d84418f5
With i915 added to i915_inject_probe_failure we can use dedicated printk when injecting artificial load failure. Also make this function look like other i915 functions that return error code and make it more flexible to return any provided error code instead of previously assumed -ENODEV. Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20190802184055.31988-2-michal.wajdeczko@intel.com
139 lines
3.9 KiB
C
139 lines
3.9 KiB
C
/*
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* Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "i915_drv.h"
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#include "intel_gvt.h"
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/**
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* DOC: Intel GVT-g host support
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*
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* Intel GVT-g is a graphics virtualization technology which shares the
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* GPU among multiple virtual machines on a time-sharing basis. Each
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* virtual machine is presented a virtual GPU (vGPU), which has equivalent
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* features as the underlying physical GPU (pGPU), so i915 driver can run
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* seamlessly in a virtual machine.
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*
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* To virtualize GPU resources GVT-g driver depends on hypervisor technology
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* e.g KVM/VFIO/mdev, Xen, etc. to provide resource access trapping capability
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* and be virtualized within GVT-g device module. More architectural design
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* doc is available on https://01.org/group/2230/documentation-list.
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*/
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static bool is_supported_device(struct drm_i915_private *dev_priv)
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{
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if (IS_BROADWELL(dev_priv))
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return true;
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if (IS_SKYLAKE(dev_priv))
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return true;
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if (IS_KABYLAKE(dev_priv))
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return true;
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if (IS_BROXTON(dev_priv))
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return true;
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if (IS_COFFEELAKE(dev_priv))
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return true;
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return false;
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}
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/**
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* intel_gvt_sanitize_options - sanitize GVT related options
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* @dev_priv: drm i915 private data
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*
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* This function is called at the i915 options sanitize stage.
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*/
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void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv)
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{
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if (!i915_modparams.enable_gvt)
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return;
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if (intel_vgpu_active(dev_priv)) {
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DRM_INFO("GVT-g is disabled for guest\n");
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goto bail;
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}
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if (!is_supported_device(dev_priv)) {
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DRM_INFO("Unsupported device. GVT-g is disabled\n");
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goto bail;
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}
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return;
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bail:
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i915_modparams.enable_gvt = 0;
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}
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/**
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* intel_gvt_init - initialize GVT components
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* @dev_priv: drm i915 private data
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*
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* This function is called at the initialization stage to create a GVT device.
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*
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* Returns:
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* Zero on success, negative error code if failed.
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*
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*/
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int intel_gvt_init(struct drm_i915_private *dev_priv)
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{
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int ret;
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if (i915_inject_probe_failure(dev_priv))
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return -ENODEV;
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if (!i915_modparams.enable_gvt) {
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DRM_DEBUG_DRIVER("GVT-g is disabled by kernel params\n");
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return 0;
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}
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if (USES_GUC_SUBMISSION(dev_priv)) {
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DRM_ERROR("i915 GVT-g loading failed due to Graphics virtualization is not yet supported with GuC submission\n");
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return -EIO;
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}
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ret = intel_gvt_init_device(dev_priv);
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if (ret) {
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DRM_DEBUG_DRIVER("Fail to init GVT device\n");
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goto bail;
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}
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return 0;
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bail:
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i915_modparams.enable_gvt = 0;
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return 0;
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}
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/**
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* intel_gvt_driver_remove - cleanup GVT components when i915 driver is
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* unbinding
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* @dev_priv: drm i915 private *
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*
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* This function is called at the i915 driver unloading stage, to shutdown
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* GVT components and release the related resources.
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*/
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void intel_gvt_driver_remove(struct drm_i915_private *dev_priv)
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{
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if (!intel_gvt_active(dev_priv))
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return;
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intel_gvt_clean_device(dev_priv);
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}
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