2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
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:
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,
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
24 * Kevin Tian <kevin.tian@intel.com>
25 * Eddie Dong <eddie.dong@intel.com>
28 * Niu Bing <bing.niu@intel.com>
29 * Zhi Wang <zhi.a.wang@intel.com>
33 #include <linux/types.h>
38 struct intel_gvt_host intel_gvt_host;
40 static const char * const supported_hypervisors[] = {
41 [INTEL_GVT_HYPERVISOR_XEN] = "XEN",
42 [INTEL_GVT_HYPERVISOR_KVM] = "KVM",
45 struct intel_gvt_io_emulation_ops intel_gvt_io_emulation_ops = {
46 .emulate_cfg_read = intel_vgpu_emulate_cfg_read,
47 .emulate_cfg_write = intel_vgpu_emulate_cfg_write,
48 .emulate_mmio_read = intel_vgpu_emulate_mmio_read,
49 .emulate_mmio_write = intel_vgpu_emulate_mmio_write,
53 * intel_gvt_init_host - Load MPT modules and detect if we're running in host
54 * @gvt: intel gvt device
56 * This function is called at the driver loading stage. If failed to find a
57 * loadable MPT module or detect currently we're running in a VM, then GVT-g
61 * Zero on success, negative error code if failed.
64 int intel_gvt_init_host(void)
66 if (intel_gvt_host.initialized)
70 if (xen_domain() && !xen_initial_domain())
73 /* Try to load MPT modules for hypervisors */
74 if (xen_initial_domain()) {
76 intel_gvt_host.mpt = try_then_request_module(
77 symbol_get(xengt_mpt), "xengt");
78 intel_gvt_host.hypervisor_type = INTEL_GVT_HYPERVISOR_XEN;
80 /* not in Xen. Try KVMGT */
81 intel_gvt_host.mpt = try_then_request_module(
82 symbol_get(kvmgt_mpt), "kvm");
83 intel_gvt_host.hypervisor_type = INTEL_GVT_HYPERVISOR_KVM;
86 /* Fail to load MPT modules - bail out */
87 if (!intel_gvt_host.mpt)
90 /* Try to detect if we're running in host instead of VM. */
91 if (!intel_gvt_hypervisor_detect_host())
94 gvt_dbg_core("Running with hypervisor %s in host mode\n",
95 supported_hypervisors[intel_gvt_host.hypervisor_type]);
97 intel_gvt_host.initialized = true;
101 static void init_device_info(struct intel_gvt *gvt)
103 struct intel_gvt_device_info *info = &gvt->device_info;
105 if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)) {
106 info->max_support_vgpus = 8;
107 info->cfg_space_size = 256;
108 info->mmio_size = 2 * 1024 * 1024;
110 info->msi_cap_offset = IS_SKYLAKE(gvt->dev_priv) ? 0xac : 0x90;
111 info->gtt_start_offset = 8 * 1024 * 1024;
112 info->gtt_entry_size = 8;
113 info->gtt_entry_size_shift = 3;
118 * intel_gvt_clean_device - clean a GVT device
119 * @gvt: intel gvt device
121 * This function is called at the driver unloading stage, to free the
122 * resources owned by a GVT device.
125 void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
127 struct intel_gvt *gvt = &dev_priv->gvt;
129 if (WARN_ON(!gvt->initialized))
132 intel_gvt_clean_opregion(gvt);
133 intel_gvt_clean_gtt(gvt);
134 intel_gvt_clean_irq(gvt);
135 intel_gvt_clean_mmio_info(gvt);
136 intel_gvt_free_firmware(gvt);
138 gvt->initialized = false;
142 * intel_gvt_init_device - initialize a GVT device
143 * @dev_priv: drm i915 private data
145 * This function is called at the initialization stage, to initialize
146 * necessary GVT components.
149 * Zero on success, negative error code if failed.
152 int intel_gvt_init_device(struct drm_i915_private *dev_priv)
154 struct intel_gvt *gvt = &dev_priv->gvt;
158 * Cannot initialize GVT device without intel_gvt_host gets
161 if (WARN_ON(!intel_gvt_host.initialized))
164 if (WARN_ON(gvt->initialized))
167 gvt_dbg_core("init gvt device\n");
169 mutex_init(&gvt->lock);
170 gvt->dev_priv = dev_priv;
172 init_device_info(gvt);
174 ret = intel_gvt_setup_mmio_info(gvt);
178 ret = intel_gvt_load_firmware(gvt);
180 goto out_clean_mmio_info;
182 ret = intel_gvt_init_irq(gvt);
184 goto out_free_firmware;
186 ret = intel_gvt_init_gtt(gvt);
190 ret = intel_gvt_init_opregion(gvt);
194 gvt_dbg_core("gvt device creation is done\n");
195 gvt->initialized = true;
199 intel_gvt_clean_gtt(gvt);
201 intel_gvt_clean_irq(gvt);
203 intel_gvt_free_firmware(gvt);
205 intel_gvt_clean_mmio_info(gvt);