2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
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5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
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8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 #include "intel_gvt.h"
28 * DOC: Intel GVT-g host support
30 * Intel GVT-g is a graphics virtualization technology which shares the
31 * GPU among multiple virtual machines on a time-sharing basis. Each
32 * virtual machine is presented a virtual GPU (vGPU), which has equivalent
33 * features as the underlying physical GPU (pGPU), so i915 driver can run
34 * seamlessly in a virtual machine.
36 * To virtualize GPU resources GVT-g driver depends on hypervisor technology
37 * e.g KVM/VFIO/mdev, Xen, etc. to provide resource access trapping capability
38 * and be virtualized within GVT-g device module. More architectural design
39 * doc is available on https://01.org/group/2230/documentation-list.
42 static bool is_supported_device(struct drm_i915_private *dev_priv)
44 if (IS_BROADWELL(dev_priv))
46 if (IS_SKYLAKE(dev_priv))
52 * intel_gvt_init - initialize GVT components
53 * @dev_priv: drm i915 private data
55 * This function is called at the initialization stage to create a GVT device.
58 * Zero on success, negative error code if failed.
61 int intel_gvt_init(struct drm_i915_private *dev_priv)
65 if (!i915.enable_gvt) {
66 DRM_DEBUG_DRIVER("GVT-g is disabled by kernel params\n");
70 if (intel_vgpu_active(dev_priv)) {
71 DRM_DEBUG_DRIVER("GVT-g is disabled for guest\n");
75 if (!is_supported_device(dev_priv)) {
76 DRM_DEBUG_DRIVER("Unsupported device. GVT-g is disabled\n");
80 if (!i915.enable_execlists) {
81 DRM_INFO("GPU guest virtualisation [GVT-g] disabled due to disabled execlist submission [i915.enable_execlists module parameter]\n");
86 * We're not in host or fail to find a MPT module, disable GVT-g
88 ret = intel_gvt_init_host();
90 DRM_DEBUG_DRIVER("Not in host or MPT modules not found\n");
94 ret = intel_gvt_init_device(dev_priv);
96 DRM_DEBUG_DRIVER("Fail to init GVT device\n");
108 * intel_gvt_cleanup - cleanup GVT components when i915 driver is unloading
109 * @dev_priv: drm i915 private *
111 * This function is called at the i915 driver unloading stage, to shutdown
112 * GVT components and release the related resources.
114 void intel_gvt_cleanup(struct drm_i915_private *dev_priv)
116 if (!intel_gvt_active(dev_priv))
119 intel_gvt_clean_device(dev_priv);