]>
Commit | Line | Data |
---|---|---|
0ad35fed ZW |
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. | |
12d14cc4 ZW |
22 | * |
23 | * Authors: | |
24 | * Kevin Tian <kevin.tian@intel.com> | |
25 | * Eddie Dong <eddie.dong@intel.com> | |
26 | * | |
27 | * Contributors: | |
28 | * Niu Bing <bing.niu@intel.com> | |
29 | * Zhi Wang <zhi.a.wang@intel.com> | |
30 | * | |
0ad35fed ZW |
31 | */ |
32 | ||
33 | #include <linux/types.h> | |
34 | #include <xen/xen.h> | |
35 | ||
36 | #include "i915_drv.h" | |
37 | ||
38 | struct intel_gvt_host intel_gvt_host; | |
39 | ||
40 | static const char * const supported_hypervisors[] = { | |
41 | [INTEL_GVT_HYPERVISOR_XEN] = "XEN", | |
42 | [INTEL_GVT_HYPERVISOR_KVM] = "KVM", | |
43 | }; | |
44 | ||
45 | /** | |
46 | * intel_gvt_init_host - Load MPT modules and detect if we're running in host | |
47 | * @gvt: intel gvt device | |
48 | * | |
49 | * This function is called at the driver loading stage. If failed to find a | |
50 | * loadable MPT module or detect currently we're running in a VM, then GVT-g | |
51 | * will be disabled | |
52 | * | |
53 | * Returns: | |
54 | * Zero on success, negative error code if failed. | |
55 | * | |
56 | */ | |
57 | int intel_gvt_init_host(void) | |
58 | { | |
59 | if (intel_gvt_host.initialized) | |
60 | return 0; | |
61 | ||
62 | /* Xen DOM U */ | |
63 | if (xen_domain() && !xen_initial_domain()) | |
64 | return -ENODEV; | |
65 | ||
66 | /* Try to load MPT modules for hypervisors */ | |
67 | if (xen_initial_domain()) { | |
68 | /* In Xen dom0 */ | |
69 | intel_gvt_host.mpt = try_then_request_module( | |
70 | symbol_get(xengt_mpt), "xengt"); | |
71 | intel_gvt_host.hypervisor_type = INTEL_GVT_HYPERVISOR_XEN; | |
72 | } else { | |
73 | /* not in Xen. Try KVMGT */ | |
74 | intel_gvt_host.mpt = try_then_request_module( | |
75 | symbol_get(kvmgt_mpt), "kvm"); | |
76 | intel_gvt_host.hypervisor_type = INTEL_GVT_HYPERVISOR_KVM; | |
77 | } | |
78 | ||
79 | /* Fail to load MPT modules - bail out */ | |
80 | if (!intel_gvt_host.mpt) | |
81 | return -EINVAL; | |
82 | ||
83 | /* Try to detect if we're running in host instead of VM. */ | |
84 | if (!intel_gvt_hypervisor_detect_host()) | |
85 | return -ENODEV; | |
86 | ||
87 | gvt_dbg_core("Running with hypervisor %s in host mode\n", | |
88 | supported_hypervisors[intel_gvt_host.hypervisor_type]); | |
89 | ||
90 | intel_gvt_host.initialized = true; | |
91 | return 0; | |
92 | } | |
93 | ||
94 | static void init_device_info(struct intel_gvt *gvt) | |
95 | { | |
12d14cc4 ZW |
96 | struct intel_gvt_device_info *info = &gvt->device_info; |
97 | ||
98 | if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)) { | |
99 | info->max_support_vgpus = 8; | |
579cea5f | 100 | info->cfg_space_size = 256; |
c8fe6a68 | 101 | info->mmio_size = 2 * 1024 * 1024; |
579cea5f | 102 | info->mmio_bar = 0; |
c8fe6a68 | 103 | info->msi_cap_offset = IS_SKYLAKE(gvt->dev_priv) ? 0xac : 0x90; |
2707e444 ZW |
104 | info->gtt_start_offset = 8 * 1024 * 1024; |
105 | info->gtt_entry_size = 8; | |
106 | info->gtt_entry_size_shift = 3; | |
12d14cc4 | 107 | } |
0ad35fed ZW |
108 | } |
109 | ||
110 | /** | |
111 | * intel_gvt_clean_device - clean a GVT device | |
112 | * @gvt: intel gvt device | |
113 | * | |
114 | * This function is called at the driver unloading stage, to free the | |
115 | * resources owned by a GVT device. | |
116 | * | |
117 | */ | |
118 | void intel_gvt_clean_device(struct drm_i915_private *dev_priv) | |
119 | { | |
120 | struct intel_gvt *gvt = &dev_priv->gvt; | |
121 | ||
122 | if (WARN_ON(!gvt->initialized)) | |
123 | return; | |
124 | ||
2707e444 | 125 | intel_gvt_clean_gtt(gvt); |
c8fe6a68 | 126 | intel_gvt_clean_irq(gvt); |
12d14cc4 | 127 | intel_gvt_clean_mmio_info(gvt); |
579cea5f | 128 | intel_gvt_free_firmware(gvt); |
0ad35fed ZW |
129 | |
130 | gvt->initialized = false; | |
131 | } | |
132 | ||
133 | /** | |
134 | * intel_gvt_init_device - initialize a GVT device | |
135 | * @dev_priv: drm i915 private data | |
136 | * | |
137 | * This function is called at the initialization stage, to initialize | |
138 | * necessary GVT components. | |
139 | * | |
140 | * Returns: | |
141 | * Zero on success, negative error code if failed. | |
142 | * | |
143 | */ | |
144 | int intel_gvt_init_device(struct drm_i915_private *dev_priv) | |
145 | { | |
146 | struct intel_gvt *gvt = &dev_priv->gvt; | |
12d14cc4 ZW |
147 | int ret; |
148 | ||
0ad35fed ZW |
149 | /* |
150 | * Cannot initialize GVT device without intel_gvt_host gets | |
151 | * initialized first. | |
152 | */ | |
153 | if (WARN_ON(!intel_gvt_host.initialized)) | |
154 | return -EINVAL; | |
155 | ||
156 | if (WARN_ON(gvt->initialized)) | |
157 | return -EEXIST; | |
158 | ||
159 | gvt_dbg_core("init gvt device\n"); | |
160 | ||
28a60dee ZW |
161 | mutex_init(&gvt->lock); |
162 | gvt->dev_priv = dev_priv; | |
163 | ||
0ad35fed | 164 | init_device_info(gvt); |
12d14cc4 ZW |
165 | |
166 | ret = intel_gvt_setup_mmio_info(gvt); | |
167 | if (ret) | |
168 | return ret; | |
169 | ||
579cea5f ZW |
170 | ret = intel_gvt_load_firmware(gvt); |
171 | if (ret) | |
172 | goto out_clean_mmio_info; | |
173 | ||
c8fe6a68 ZW |
174 | ret = intel_gvt_init_irq(gvt); |
175 | if (ret) | |
176 | goto out_free_firmware; | |
177 | ||
2707e444 ZW |
178 | ret = intel_gvt_init_gtt(gvt); |
179 | if (ret) | |
180 | goto out_clean_irq; | |
181 | ||
0ad35fed ZW |
182 | gvt_dbg_core("gvt device creation is done\n"); |
183 | gvt->initialized = true; | |
184 | return 0; | |
579cea5f | 185 | |
2707e444 ZW |
186 | out_clean_irq: |
187 | intel_gvt_clean_irq(gvt); | |
c8fe6a68 ZW |
188 | out_free_firmware: |
189 | intel_gvt_free_firmware(gvt); | |
579cea5f ZW |
190 | out_clean_mmio_info: |
191 | intel_gvt_clean_mmio_info(gvt); | |
192 | return ret; | |
0ad35fed | 193 | } |