| /* |
| * Copyright(c) 2011-2016 Intel Corporation. All rights reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| * Authors: |
| * Kevin Tian <kevin.tian@intel.com> |
| * Eddie Dong <eddie.dong@intel.com> |
| * |
| * Contributors: |
| * Niu Bing <bing.niu@intel.com> |
| * Zhi Wang <zhi.a.wang@intel.com> |
| * |
| */ |
| |
| #include <linux/types.h> |
| #include <xen/xen.h> |
| |
| #include "i915_drv.h" |
| |
| struct intel_gvt_host intel_gvt_host; |
| |
| static const char * const supported_hypervisors[] = { |
| [INTEL_GVT_HYPERVISOR_XEN] = "XEN", |
| [INTEL_GVT_HYPERVISOR_KVM] = "KVM", |
| }; |
| |
| struct intel_gvt_io_emulation_ops intel_gvt_io_emulation_ops = { |
| .emulate_cfg_read = intel_vgpu_emulate_cfg_read, |
| .emulate_cfg_write = intel_vgpu_emulate_cfg_write, |
| .emulate_mmio_read = intel_vgpu_emulate_mmio_read, |
| .emulate_mmio_write = intel_vgpu_emulate_mmio_write, |
| }; |
| |
| /** |
| * intel_gvt_init_host - Load MPT modules and detect if we're running in host |
| * @gvt: intel gvt device |
| * |
| * This function is called at the driver loading stage. If failed to find a |
| * loadable MPT module or detect currently we're running in a VM, then GVT-g |
| * will be disabled |
| * |
| * Returns: |
| * Zero on success, negative error code if failed. |
| * |
| */ |
| int intel_gvt_init_host(void) |
| { |
| if (intel_gvt_host.initialized) |
| return 0; |
| |
| /* Xen DOM U */ |
| if (xen_domain() && !xen_initial_domain()) |
| return -ENODEV; |
| |
| /* Try to load MPT modules for hypervisors */ |
| if (xen_initial_domain()) { |
| /* In Xen dom0 */ |
| intel_gvt_host.mpt = try_then_request_module( |
| symbol_get(xengt_mpt), "xengt"); |
| intel_gvt_host.hypervisor_type = INTEL_GVT_HYPERVISOR_XEN; |
| } else { |
| /* not in Xen. Try KVMGT */ |
| intel_gvt_host.mpt = try_then_request_module( |
| symbol_get(kvmgt_mpt), "kvm"); |
| intel_gvt_host.hypervisor_type = INTEL_GVT_HYPERVISOR_KVM; |
| } |
| |
| /* Fail to load MPT modules - bail out */ |
| if (!intel_gvt_host.mpt) |
| return -EINVAL; |
| |
| /* Try to detect if we're running in host instead of VM. */ |
| if (!intel_gvt_hypervisor_detect_host()) |
| return -ENODEV; |
| |
| gvt_dbg_core("Running with hypervisor %s in host mode\n", |
| supported_hypervisors[intel_gvt_host.hypervisor_type]); |
| |
| intel_gvt_host.initialized = true; |
| return 0; |
| } |
| |
| static void init_device_info(struct intel_gvt *gvt) |
| { |
| struct intel_gvt_device_info *info = &gvt->device_info; |
| |
| if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)) { |
| info->max_support_vgpus = 8; |
| info->cfg_space_size = 256; |
| info->mmio_size = 2 * 1024 * 1024; |
| info->mmio_bar = 0; |
| info->msi_cap_offset = IS_SKYLAKE(gvt->dev_priv) ? 0xac : 0x90; |
| info->gtt_start_offset = 8 * 1024 * 1024; |
| info->gtt_entry_size = 8; |
| info->gtt_entry_size_shift = 3; |
| } |
| } |
| |
| /** |
| * intel_gvt_clean_device - clean a GVT device |
| * @gvt: intel gvt device |
| * |
| * This function is called at the driver unloading stage, to free the |
| * resources owned by a GVT device. |
| * |
| */ |
| void intel_gvt_clean_device(struct drm_i915_private *dev_priv) |
| { |
| struct intel_gvt *gvt = &dev_priv->gvt; |
| |
| if (WARN_ON(!gvt->initialized)) |
| return; |
| |
| intel_gvt_clean_opregion(gvt); |
| intel_gvt_clean_gtt(gvt); |
| intel_gvt_clean_irq(gvt); |
| intel_gvt_clean_mmio_info(gvt); |
| intel_gvt_free_firmware(gvt); |
| |
| gvt->initialized = false; |
| } |
| |
| /** |
| * intel_gvt_init_device - initialize a GVT device |
| * @dev_priv: drm i915 private data |
| * |
| * This function is called at the initialization stage, to initialize |
| * necessary GVT components. |
| * |
| * Returns: |
| * Zero on success, negative error code if failed. |
| * |
| */ |
| int intel_gvt_init_device(struct drm_i915_private *dev_priv) |
| { |
| struct intel_gvt *gvt = &dev_priv->gvt; |
| int ret; |
| |
| /* |
| * Cannot initialize GVT device without intel_gvt_host gets |
| * initialized first. |
| */ |
| if (WARN_ON(!intel_gvt_host.initialized)) |
| return -EINVAL; |
| |
| if (WARN_ON(gvt->initialized)) |
| return -EEXIST; |
| |
| gvt_dbg_core("init gvt device\n"); |
| |
| mutex_init(&gvt->lock); |
| gvt->dev_priv = dev_priv; |
| |
| init_device_info(gvt); |
| |
| ret = intel_gvt_setup_mmio_info(gvt); |
| if (ret) |
| return ret; |
| |
| ret = intel_gvt_load_firmware(gvt); |
| if (ret) |
| goto out_clean_mmio_info; |
| |
| ret = intel_gvt_init_irq(gvt); |
| if (ret) |
| goto out_free_firmware; |
| |
| ret = intel_gvt_init_gtt(gvt); |
| if (ret) |
| goto out_clean_irq; |
| |
| ret = intel_gvt_init_opregion(gvt); |
| if (ret) |
| goto out_clean_gtt; |
| |
| gvt_dbg_core("gvt device creation is done\n"); |
| gvt->initialized = true; |
| return 0; |
| |
| out_clean_gtt: |
| intel_gvt_clean_gtt(gvt); |
| out_clean_irq: |
| intel_gvt_clean_irq(gvt); |
| out_free_firmware: |
| intel_gvt_free_firmware(gvt); |
| out_clean_mmio_info: |
| intel_gvt_clean_mmio_info(gvt); |
| return ret; |
| } |