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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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,
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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))
48 if (IS_KABYLAKE(dev_priv))
50 if (IS_BROXTON(dev_priv))
52 if (IS_COFFEELAKE(dev_priv))
59 * intel_gvt_sanitize_options - sanitize GVT related options
60 * @dev_priv: drm i915 private data
62 * This function is called at the i915 options sanitize stage.
64 void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv)
66 if (!i915_modparams.enable_gvt)
69 if (intel_vgpu_active(dev_priv)) {
70 drm_info(&dev_priv->drm, "GVT-g is disabled for guest\n");
74 if (!is_supported_device(dev_priv)) {
75 drm_info(&dev_priv->drm,
76 "Unsupported device. GVT-g is disabled\n");
82 i915_modparams.enable_gvt = 0;
86 * intel_gvt_init - initialize GVT components
87 * @dev_priv: drm i915 private data
89 * This function is called at the initialization stage to create a GVT device.
92 * Zero on success, negative error code if failed.
95 int intel_gvt_init(struct drm_i915_private *dev_priv)
99 if (i915_inject_probe_failure(dev_priv))
102 if (!i915_modparams.enable_gvt) {
103 drm_dbg(&dev_priv->drm,
104 "GVT-g is disabled by kernel params\n");
108 if (intel_uc_wants_guc_submission(&dev_priv->gt.uc)) {
109 drm_err(&dev_priv->drm,
110 "i915 GVT-g loading failed due to Graphics virtualization is not yet supported with GuC submission\n");
114 ret = intel_gvt_init_device(dev_priv);
116 drm_dbg(&dev_priv->drm, "Fail to init GVT device\n");
123 i915_modparams.enable_gvt = 0;
128 * intel_gvt_driver_remove - cleanup GVT components when i915 driver is
130 * @dev_priv: drm i915 private *
132 * This function is called at the i915 driver unloading stage, to shutdown
133 * GVT components and release the related resources.
135 void intel_gvt_driver_remove(struct drm_i915_private *dev_priv)
137 if (!intel_gvt_active(dev_priv))
140 intel_gvt_clean_device(dev_priv);