1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Permission is hereby granted, free of charge, to any person obtaining a
5*4882a593Smuzhiyun * copy of this software and associated documentation files (the "Software"),
6*4882a593Smuzhiyun * to deal in the Software without restriction, including without limitation
7*4882a593Smuzhiyun * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8*4882a593Smuzhiyun * and/or sell copies of the Software, and to permit persons to whom the
9*4882a593Smuzhiyun * Software is furnished to do so, subject to the following conditions:
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * The above copyright notice and this permission notice (including the next
12*4882a593Smuzhiyun * paragraph) shall be included in all copies or substantial portions of the
13*4882a593Smuzhiyun * Software.
14*4882a593Smuzhiyun *
15*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16*4882a593Smuzhiyun * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17*4882a593Smuzhiyun * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18*4882a593Smuzhiyun * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19*4882a593Smuzhiyun * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20*4882a593Smuzhiyun * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21*4882a593Smuzhiyun * SOFTWARE.
22*4882a593Smuzhiyun */
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #include "i915_drv.h"
25*4882a593Smuzhiyun #include "i915_vgpu.h"
26*4882a593Smuzhiyun #include "intel_gvt.h"
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun /**
29*4882a593Smuzhiyun * DOC: Intel GVT-g host support
30*4882a593Smuzhiyun *
31*4882a593Smuzhiyun * Intel GVT-g is a graphics virtualization technology which shares the
32*4882a593Smuzhiyun * GPU among multiple virtual machines on a time-sharing basis. Each
33*4882a593Smuzhiyun * virtual machine is presented a virtual GPU (vGPU), which has equivalent
34*4882a593Smuzhiyun * features as the underlying physical GPU (pGPU), so i915 driver can run
35*4882a593Smuzhiyun * seamlessly in a virtual machine.
36*4882a593Smuzhiyun *
37*4882a593Smuzhiyun * To virtualize GPU resources GVT-g driver depends on hypervisor technology
38*4882a593Smuzhiyun * e.g KVM/VFIO/mdev, Xen, etc. to provide resource access trapping capability
39*4882a593Smuzhiyun * and be virtualized within GVT-g device module. More architectural design
40*4882a593Smuzhiyun * doc is available on https://01.org/group/2230/documentation-list.
41*4882a593Smuzhiyun */
42*4882a593Smuzhiyun
is_supported_device(struct drm_i915_private * dev_priv)43*4882a593Smuzhiyun static bool is_supported_device(struct drm_i915_private *dev_priv)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun if (IS_BROADWELL(dev_priv))
46*4882a593Smuzhiyun return true;
47*4882a593Smuzhiyun if (IS_SKYLAKE(dev_priv))
48*4882a593Smuzhiyun return true;
49*4882a593Smuzhiyun if (IS_KABYLAKE(dev_priv))
50*4882a593Smuzhiyun return true;
51*4882a593Smuzhiyun if (IS_BROXTON(dev_priv))
52*4882a593Smuzhiyun return true;
53*4882a593Smuzhiyun if (IS_COFFEELAKE(dev_priv))
54*4882a593Smuzhiyun return true;
55*4882a593Smuzhiyun if (IS_COMETLAKE(dev_priv))
56*4882a593Smuzhiyun return true;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun return false;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun /**
62*4882a593Smuzhiyun * intel_gvt_sanitize_options - sanitize GVT related options
63*4882a593Smuzhiyun * @dev_priv: drm i915 private data
64*4882a593Smuzhiyun *
65*4882a593Smuzhiyun * This function is called at the i915 options sanitize stage.
66*4882a593Smuzhiyun */
intel_gvt_sanitize_options(struct drm_i915_private * dev_priv)67*4882a593Smuzhiyun void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv)
68*4882a593Smuzhiyun {
69*4882a593Smuzhiyun if (!dev_priv->params.enable_gvt)
70*4882a593Smuzhiyun return;
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun if (intel_vgpu_active(dev_priv)) {
73*4882a593Smuzhiyun drm_info(&dev_priv->drm, "GVT-g is disabled for guest\n");
74*4882a593Smuzhiyun goto bail;
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun if (!is_supported_device(dev_priv)) {
78*4882a593Smuzhiyun drm_info(&dev_priv->drm,
79*4882a593Smuzhiyun "Unsupported device. GVT-g is disabled\n");
80*4882a593Smuzhiyun goto bail;
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun return;
84*4882a593Smuzhiyun bail:
85*4882a593Smuzhiyun dev_priv->params.enable_gvt = 0;
86*4882a593Smuzhiyun }
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun /**
89*4882a593Smuzhiyun * intel_gvt_init - initialize GVT components
90*4882a593Smuzhiyun * @dev_priv: drm i915 private data
91*4882a593Smuzhiyun *
92*4882a593Smuzhiyun * This function is called at the initialization stage to create a GVT device.
93*4882a593Smuzhiyun *
94*4882a593Smuzhiyun * Returns:
95*4882a593Smuzhiyun * Zero on success, negative error code if failed.
96*4882a593Smuzhiyun *
97*4882a593Smuzhiyun */
intel_gvt_init(struct drm_i915_private * dev_priv)98*4882a593Smuzhiyun int intel_gvt_init(struct drm_i915_private *dev_priv)
99*4882a593Smuzhiyun {
100*4882a593Smuzhiyun int ret;
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun if (i915_inject_probe_failure(dev_priv))
103*4882a593Smuzhiyun return -ENODEV;
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun if (!dev_priv->params.enable_gvt) {
106*4882a593Smuzhiyun drm_dbg(&dev_priv->drm,
107*4882a593Smuzhiyun "GVT-g is disabled by kernel params\n");
108*4882a593Smuzhiyun return 0;
109*4882a593Smuzhiyun }
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun if (intel_uc_wants_guc_submission(&dev_priv->gt.uc)) {
112*4882a593Smuzhiyun drm_err(&dev_priv->drm,
113*4882a593Smuzhiyun "i915 GVT-g loading failed due to Graphics virtualization is not yet supported with GuC submission\n");
114*4882a593Smuzhiyun return -EIO;
115*4882a593Smuzhiyun }
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun ret = intel_gvt_init_device(dev_priv);
118*4882a593Smuzhiyun if (ret) {
119*4882a593Smuzhiyun drm_dbg(&dev_priv->drm, "Fail to init GVT device\n");
120*4882a593Smuzhiyun goto bail;
121*4882a593Smuzhiyun }
122*4882a593Smuzhiyun
123*4882a593Smuzhiyun return 0;
124*4882a593Smuzhiyun
125*4882a593Smuzhiyun bail:
126*4882a593Smuzhiyun dev_priv->params.enable_gvt = 0;
127*4882a593Smuzhiyun return 0;
128*4882a593Smuzhiyun }
129*4882a593Smuzhiyun
intel_gvt_active(struct drm_i915_private * dev_priv)130*4882a593Smuzhiyun static inline bool intel_gvt_active(struct drm_i915_private *dev_priv)
131*4882a593Smuzhiyun {
132*4882a593Smuzhiyun return dev_priv->gvt;
133*4882a593Smuzhiyun }
134*4882a593Smuzhiyun
135*4882a593Smuzhiyun /**
136*4882a593Smuzhiyun * intel_gvt_driver_remove - cleanup GVT components when i915 driver is
137*4882a593Smuzhiyun * unbinding
138*4882a593Smuzhiyun * @dev_priv: drm i915 private *
139*4882a593Smuzhiyun *
140*4882a593Smuzhiyun * This function is called at the i915 driver unloading stage, to shutdown
141*4882a593Smuzhiyun * GVT components and release the related resources.
142*4882a593Smuzhiyun */
intel_gvt_driver_remove(struct drm_i915_private * dev_priv)143*4882a593Smuzhiyun void intel_gvt_driver_remove(struct drm_i915_private *dev_priv)
144*4882a593Smuzhiyun {
145*4882a593Smuzhiyun if (!intel_gvt_active(dev_priv))
146*4882a593Smuzhiyun return;
147*4882a593Smuzhiyun
148*4882a593Smuzhiyun intel_gvt_clean_device(dev_priv);
149*4882a593Smuzhiyun }
150