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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 "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. This file provides the englightments | |
35 | * of GVT and the necessary components used by GVT in i915 driver. | |
36 | */ | |
37 | ||
38 | static bool is_supported_device(struct drm_i915_private *dev_priv) | |
39 | { | |
40 | if (IS_BROADWELL(dev_priv)) | |
41 | return true; | |
42 | return false; | |
43 | } | |
44 | ||
45 | /** | |
46 | * intel_gvt_init - initialize GVT components | |
47 | * @dev_priv: drm i915 private data | |
48 | * | |
49 | * This function is called at the initialization stage to create a GVT device. | |
50 | * | |
51 | * Returns: | |
52 | * Zero on success, negative error code if failed. | |
53 | * | |
54 | */ | |
55 | int intel_gvt_init(struct drm_i915_private *dev_priv) | |
56 | { | |
57 | int ret; | |
58 | ||
59 | if (!i915.enable_gvt) { | |
60 | DRM_DEBUG_DRIVER("GVT-g is disabled by kernel params\n"); | |
61 | return 0; | |
62 | } | |
63 | ||
64 | if (!is_supported_device(dev_priv)) { | |
65 | DRM_DEBUG_DRIVER("Unsupported device. GVT-g is disabled\n"); | |
7822492f | 66 | goto bail; |
0ad35fed ZW |
67 | } |
68 | ||
69 | /* | |
70 | * We're not in host or fail to find a MPT module, disable GVT-g | |
71 | */ | |
72 | ret = intel_gvt_init_host(); | |
73 | if (ret) { | |
74 | DRM_DEBUG_DRIVER("Not in host or MPT modules not found\n"); | |
7822492f | 75 | goto bail; |
0ad35fed ZW |
76 | } |
77 | ||
78 | ret = intel_gvt_init_device(dev_priv); | |
79 | if (ret) { | |
80 | DRM_DEBUG_DRIVER("Fail to init GVT device\n"); | |
7822492f | 81 | goto bail; |
0ad35fed ZW |
82 | } |
83 | ||
84 | return 0; | |
7822492f CW |
85 | |
86 | bail: | |
87 | i915.enable_gvt = 0; | |
88 | return 0; | |
0ad35fed ZW |
89 | } |
90 | ||
91 | /** | |
92 | * intel_gvt_cleanup - cleanup GVT components when i915 driver is unloading | |
93 | * @dev_priv: drm i915 private * | |
94 | * | |
95 | * This function is called at the i915 driver unloading stage, to shutdown | |
96 | * GVT components and release the related resources. | |
97 | */ | |
98 | void intel_gvt_cleanup(struct drm_i915_private *dev_priv) | |
99 | { | |
100 | if (!intel_gvt_active(dev_priv)) | |
101 | return; | |
102 | ||
103 | intel_gvt_clean_device(dev_priv); | |
104 | } |