| /* |
| * 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. This file provides the englightments |
| * of GVT and the necessary components used by GVT in i915 driver. |
| */ |
| |
| static bool is_supported_device(struct drm_i915_private *dev_priv) |
| { |
| if (IS_BROADWELL(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); |
| } |