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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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811a4cf273
gvt driver has a check which doesn't allow to use gvt when host gpu iommu is enabled. This check can be removed after enable the iommu support in gvt Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
318 lines
8.0 KiB
C
318 lines
8.0 KiB
C
/*
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* Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Kevin Tian <kevin.tian@intel.com>
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* Eddie Dong <eddie.dong@intel.com>
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*
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* Contributors:
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* Niu Bing <bing.niu@intel.com>
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* Zhi Wang <zhi.a.wang@intel.com>
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*
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*/
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#include <linux/types.h>
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#include <xen/xen.h>
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#include <linux/kthread.h>
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#include "i915_drv.h"
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#include "gvt.h"
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struct intel_gvt_host intel_gvt_host;
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static const char * const supported_hypervisors[] = {
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[INTEL_GVT_HYPERVISOR_XEN] = "XEN",
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[INTEL_GVT_HYPERVISOR_KVM] = "KVM",
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};
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static const struct intel_gvt_ops intel_gvt_ops = {
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.emulate_cfg_read = intel_vgpu_emulate_cfg_read,
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.emulate_cfg_write = intel_vgpu_emulate_cfg_write,
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.emulate_mmio_read = intel_vgpu_emulate_mmio_read,
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.emulate_mmio_write = intel_vgpu_emulate_mmio_write,
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.vgpu_create = intel_gvt_create_vgpu,
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.vgpu_destroy = intel_gvt_destroy_vgpu,
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.vgpu_reset = intel_gvt_reset_vgpu,
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};
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/**
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* intel_gvt_init_host - Load MPT modules and detect if we're running in host
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* @gvt: intel gvt device
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*
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* This function is called at the driver loading stage. If failed to find a
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* loadable MPT module or detect currently we're running in a VM, then GVT-g
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* will be disabled
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*
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* Returns:
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* Zero on success, negative error code if failed.
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*
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*/
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int intel_gvt_init_host(void)
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{
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if (intel_gvt_host.initialized)
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return 0;
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/* Xen DOM U */
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if (xen_domain() && !xen_initial_domain())
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return -ENODEV;
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/* Try to load MPT modules for hypervisors */
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if (xen_initial_domain()) {
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/* In Xen dom0 */
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intel_gvt_host.mpt = try_then_request_module(
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symbol_get(xengt_mpt), "xengt");
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intel_gvt_host.hypervisor_type = INTEL_GVT_HYPERVISOR_XEN;
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} else {
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#if IS_ENABLED(CONFIG_DRM_I915_GVT_KVMGT)
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/* not in Xen. Try KVMGT */
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intel_gvt_host.mpt = try_then_request_module(
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symbol_get(kvmgt_mpt), "kvmgt");
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intel_gvt_host.hypervisor_type = INTEL_GVT_HYPERVISOR_KVM;
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#endif
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}
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/* Fail to load MPT modules - bail out */
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if (!intel_gvt_host.mpt)
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return -EINVAL;
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gvt_dbg_core("Running with hypervisor %s in host mode\n",
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supported_hypervisors[intel_gvt_host.hypervisor_type]);
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intel_gvt_host.initialized = true;
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return 0;
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}
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static void init_device_info(struct intel_gvt *gvt)
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{
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struct intel_gvt_device_info *info = &gvt->device_info;
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struct pci_dev *pdev = gvt->dev_priv->drm.pdev;
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if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)) {
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info->max_support_vgpus = 8;
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info->cfg_space_size = 256;
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info->mmio_size = 2 * 1024 * 1024;
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info->mmio_bar = 0;
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info->gtt_start_offset = 8 * 1024 * 1024;
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info->gtt_entry_size = 8;
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info->gtt_entry_size_shift = 3;
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info->gmadr_bytes_in_cmd = 8;
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info->max_surface_size = 36 * 1024 * 1024;
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}
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info->msi_cap_offset = pdev->msi_cap;
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}
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static int gvt_service_thread(void *data)
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{
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struct intel_gvt *gvt = (struct intel_gvt *)data;
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int ret;
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gvt_dbg_core("service thread start\n");
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while (!kthread_should_stop()) {
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ret = wait_event_interruptible(gvt->service_thread_wq,
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kthread_should_stop() || gvt->service_request);
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if (kthread_should_stop())
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break;
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if (WARN_ONCE(ret, "service thread is waken up by signal.\n"))
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continue;
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if (test_and_clear_bit(INTEL_GVT_REQUEST_EMULATE_VBLANK,
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(void *)&gvt->service_request)) {
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mutex_lock(&gvt->lock);
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intel_gvt_emulate_vblank(gvt);
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mutex_unlock(&gvt->lock);
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}
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}
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return 0;
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}
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static void clean_service_thread(struct intel_gvt *gvt)
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{
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kthread_stop(gvt->service_thread);
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}
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static int init_service_thread(struct intel_gvt *gvt)
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{
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init_waitqueue_head(&gvt->service_thread_wq);
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gvt->service_thread = kthread_run(gvt_service_thread,
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gvt, "gvt_service_thread");
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if (IS_ERR(gvt->service_thread)) {
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gvt_err("fail to start service thread.\n");
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return PTR_ERR(gvt->service_thread);
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}
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return 0;
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}
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/**
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* intel_gvt_clean_device - clean a GVT device
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* @gvt: intel gvt device
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*
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* This function is called at the driver unloading stage, to free the
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* resources owned by a GVT device.
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*
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*/
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void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
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{
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struct intel_gvt *gvt = to_gvt(dev_priv);
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if (WARN_ON(!gvt))
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return;
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clean_service_thread(gvt);
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intel_gvt_clean_cmd_parser(gvt);
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intel_gvt_clean_sched_policy(gvt);
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intel_gvt_clean_workload_scheduler(gvt);
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intel_gvt_clean_opregion(gvt);
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intel_gvt_clean_gtt(gvt);
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intel_gvt_clean_irq(gvt);
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intel_gvt_clean_mmio_info(gvt);
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intel_gvt_free_firmware(gvt);
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intel_gvt_hypervisor_host_exit(&dev_priv->drm.pdev->dev, gvt);
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intel_gvt_clean_vgpu_types(gvt);
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idr_destroy(&gvt->vgpu_idr);
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kfree(dev_priv->gvt);
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dev_priv->gvt = NULL;
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}
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/**
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* intel_gvt_init_device - initialize a GVT device
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* @dev_priv: drm i915 private data
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*
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* This function is called at the initialization stage, to initialize
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* necessary GVT components.
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*
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* Returns:
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* Zero on success, negative error code if failed.
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*
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*/
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int intel_gvt_init_device(struct drm_i915_private *dev_priv)
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{
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struct intel_gvt *gvt;
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int ret;
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/*
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* Cannot initialize GVT device without intel_gvt_host gets
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* initialized first.
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*/
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if (WARN_ON(!intel_gvt_host.initialized))
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return -EINVAL;
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if (WARN_ON(dev_priv->gvt))
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return -EEXIST;
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gvt = kzalloc(sizeof(struct intel_gvt), GFP_KERNEL);
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if (!gvt)
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return -ENOMEM;
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gvt_dbg_core("init gvt device\n");
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idr_init(&gvt->vgpu_idr);
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mutex_init(&gvt->lock);
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gvt->dev_priv = dev_priv;
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init_device_info(gvt);
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ret = intel_gvt_setup_mmio_info(gvt);
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if (ret)
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goto out_clean_idr;
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ret = intel_gvt_load_firmware(gvt);
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if (ret)
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goto out_clean_mmio_info;
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ret = intel_gvt_init_irq(gvt);
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if (ret)
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goto out_free_firmware;
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ret = intel_gvt_init_gtt(gvt);
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if (ret)
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goto out_clean_irq;
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ret = intel_gvt_init_opregion(gvt);
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if (ret)
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goto out_clean_gtt;
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ret = intel_gvt_init_workload_scheduler(gvt);
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if (ret)
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goto out_clean_opregion;
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ret = intel_gvt_init_sched_policy(gvt);
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if (ret)
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goto out_clean_workload_scheduler;
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ret = intel_gvt_init_cmd_parser(gvt);
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if (ret)
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goto out_clean_sched_policy;
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ret = init_service_thread(gvt);
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if (ret)
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goto out_clean_cmd_parser;
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ret = intel_gvt_init_vgpu_types(gvt);
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if (ret)
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goto out_clean_thread;
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ret = intel_gvt_hypervisor_host_init(&dev_priv->drm.pdev->dev, gvt,
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&intel_gvt_ops);
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if (ret) {
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gvt_err("failed to register gvt-g host device: %d\n", ret);
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goto out_clean_types;
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}
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gvt_dbg_core("gvt device initialization is done\n");
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dev_priv->gvt = gvt;
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return 0;
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out_clean_types:
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intel_gvt_clean_vgpu_types(gvt);
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out_clean_thread:
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clean_service_thread(gvt);
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out_clean_cmd_parser:
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intel_gvt_clean_cmd_parser(gvt);
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out_clean_sched_policy:
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intel_gvt_clean_sched_policy(gvt);
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out_clean_workload_scheduler:
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intel_gvt_clean_workload_scheduler(gvt);
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out_clean_opregion:
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intel_gvt_clean_opregion(gvt);
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out_clean_gtt:
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intel_gvt_clean_gtt(gvt);
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out_clean_irq:
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intel_gvt_clean_irq(gvt);
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out_free_firmware:
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intel_gvt_free_firmware(gvt);
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out_clean_mmio_info:
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intel_gvt_clean_mmio_info(gvt);
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out_clean_idr:
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idr_destroy(&gvt->vgpu_idr);
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kfree(gvt);
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return ret;
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}
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