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1/*
2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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:
10 *
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
13 * Software.
14 *
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
21 * SOFTWARE.
22 */
23
24#include "i915_drv.h"
25#include "i915_vgpu.h"
26#include "intel_gvt.h"
27#include "gvt/gvt.h"
28
29/**
30 * DOC: Intel GVT-g host support
31 *
32 * Intel GVT-g is a graphics virtualization technology which shares the
33 * GPU among multiple virtual machines on a time-sharing basis. Each
34 * virtual machine is presented a virtual GPU (vGPU), which has equivalent
35 * features as the underlying physical GPU (pGPU), so i915 driver can run
36 * seamlessly in a virtual machine.
37 *
38 * To virtualize GPU resources GVT-g driver depends on hypervisor technology
39 * e.g KVM/VFIO/mdev, Xen, etc. to provide resource access trapping capability
40 * and be virtualized within GVT-g device module. More architectural design
41 * doc is available on https://01.org/group/2230/documentation-list.
42 */
43
44static bool is_supported_device(struct drm_i915_private *dev_priv)
45{
46 if (IS_BROADWELL(dev_priv))
47 return true;
48 if (IS_SKYLAKE(dev_priv))
49 return true;
50 if (IS_KABYLAKE(dev_priv))
51 return true;
52 if (IS_BROXTON(dev_priv))
53 return true;
54 if (IS_COFFEELAKE(dev_priv))
55 return true;
56 if (IS_COMETLAKE(dev_priv))
57 return true;
58
59 return false;
60}
61
62/**
63 * intel_gvt_sanitize_options - sanitize GVT related options
64 * @dev_priv: drm i915 private data
65 *
66 * This function is called at the i915 options sanitize stage.
67 */
68void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv)
69{
70 if (!dev_priv->params.enable_gvt)
71 return;
72
73 if (intel_vgpu_active(dev_priv)) {
74 drm_info(&dev_priv->drm, "GVT-g is disabled for guest\n");
75 goto bail;
76 }
77
78 if (!is_supported_device(dev_priv)) {
79 drm_info(&dev_priv->drm,
80 "Unsupported device. GVT-g is disabled\n");
81 goto bail;
82 }
83
84 return;
85bail:
86 dev_priv->params.enable_gvt = 0;
87}
88
89/**
90 * intel_gvt_init - initialize GVT components
91 * @dev_priv: drm i915 private data
92 *
93 * This function is called at the initialization stage to create a GVT device.
94 *
95 * Returns:
96 * Zero on success, negative error code if failed.
97 *
98 */
99int intel_gvt_init(struct drm_i915_private *dev_priv)
100{
101 int ret;
102
103 if (i915_inject_probe_failure(dev_priv))
104 return -ENODEV;
105
106 if (!dev_priv->params.enable_gvt) {
107 drm_dbg(&dev_priv->drm,
108 "GVT-g is disabled by kernel params\n");
109 return 0;
110 }
111
112 if (intel_uc_wants_guc_submission(&dev_priv->gt.uc)) {
113 drm_err(&dev_priv->drm,
114 "i915 GVT-g loading failed due to Graphics virtualization is not yet supported with GuC submission\n");
115 return -EIO;
116 }
117
118 ret = intel_gvt_init_device(dev_priv);
119 if (ret) {
120 drm_dbg(&dev_priv->drm, "Fail to init GVT device\n");
121 goto bail;
122 }
123
124 return 0;
125
126bail:
127 dev_priv->params.enable_gvt = 0;
128 return 0;
129}
130
131static inline bool intel_gvt_active(struct drm_i915_private *dev_priv)
132{
133 return dev_priv->gvt;
134}
135
136/**
137 * intel_gvt_driver_remove - cleanup GVT components when i915 driver is
138 * unbinding
139 * @dev_priv: drm i915 private *
140 *
141 * This function is called at the i915 driver unloading stage, to shutdown
142 * GVT components and release the related resources.
143 */
144void intel_gvt_driver_remove(struct drm_i915_private *dev_priv)
145{
146 if (!intel_gvt_active(dev_priv))
147 return;
148
149 intel_gvt_clean_device(dev_priv);
150}
151
152/**
153 * intel_gvt_resume - GVT resume routine wapper
154 *
155 * @dev_priv: drm i915 private *
156 *
157 * This function is called at the i915 driver resume stage to restore required
158 * HW status for GVT so that vGPU can continue running after resumed.
159 */
160void intel_gvt_resume(struct drm_i915_private *dev_priv)
161{
162 if (intel_gvt_active(dev_priv))
163 intel_gvt_pm_resume(dev_priv->gvt);
164}
1/*
2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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:
10 *
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
13 * Software.
14 *
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
21 * SOFTWARE.
22 */
23
24#include "i915_drv.h"
25#include "intel_gvt.h"
26
27/**
28 * DOC: Intel GVT-g host support
29 *
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.
35 *
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.
40 */
41
42static bool is_supported_device(struct drm_i915_private *dev_priv)
43{
44 if (IS_BROADWELL(dev_priv))
45 return true;
46 if (IS_SKYLAKE(dev_priv))
47 return true;
48 return false;
49}
50
51/**
52 * intel_gvt_init - initialize GVT components
53 * @dev_priv: drm i915 private data
54 *
55 * This function is called at the initialization stage to create a GVT device.
56 *
57 * Returns:
58 * Zero on success, negative error code if failed.
59 *
60 */
61int intel_gvt_init(struct drm_i915_private *dev_priv)
62{
63 int ret;
64
65 if (!i915.enable_gvt) {
66 DRM_DEBUG_DRIVER("GVT-g is disabled by kernel params\n");
67 return 0;
68 }
69
70 if (!is_supported_device(dev_priv)) {
71 DRM_DEBUG_DRIVER("Unsupported device. GVT-g is disabled\n");
72 goto bail;
73 }
74
75 /*
76 * We're not in host or fail to find a MPT module, disable GVT-g
77 */
78 ret = intel_gvt_init_host();
79 if (ret) {
80 DRM_DEBUG_DRIVER("Not in host or MPT modules not found\n");
81 goto bail;
82 }
83
84 ret = intel_gvt_init_device(dev_priv);
85 if (ret) {
86 DRM_DEBUG_DRIVER("Fail to init GVT device\n");
87 goto bail;
88 }
89
90 return 0;
91
92bail:
93 i915.enable_gvt = 0;
94 return 0;
95}
96
97/**
98 * intel_gvt_cleanup - cleanup GVT components when i915 driver is unloading
99 * @dev_priv: drm i915 private *
100 *
101 * This function is called at the i915 driver unloading stage, to shutdown
102 * GVT components and release the related resources.
103 */
104void intel_gvt_cleanup(struct drm_i915_private *dev_priv)
105{
106 if (!intel_gvt_active(dev_priv))
107 return;
108
109 intel_gvt_clean_device(dev_priv);
110}