/* * 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: * Eddie Dong <eddie.dong@intel.com> * Kevin Tian <kevin.tian@intel.com> * * Contributors: * Ping Gao <ping.a.gao@intel.com> * Zhi Wang <zhi.a.wang@intel.com> * Bing Niu <bing.niu@intel.com> *
*/
/* * vGPU type name is defined as GVTg_Vx_y which contains the physical GPU * generation type (e.g V4 as BDW server, V5 as SKL server). * * Depending on the physical SKU resource, we might see vGPU types like * GVTg_V4_8, GVTg_V4_4, GVTg_V4_2, etc. We can create different types of * vGPU on same physical GPU depending on available resource. Each vGPU * type will have a different number of avail_instance to indicate how * many vGPU instance can be created for this type.
*/ #define VGPU_MAX_WEIGHT 16 #define VGPU_WEIGHT(vgpu_num) \
(VGPU_MAX_WEIGHT / (vgpu_num))
/** * intel_gvt_activate_vgpu - activate a virtual GPU * @vgpu: virtual GPU * * This function is called when user wants to activate a virtual GPU. *
*/ void intel_gvt_activate_vgpu(struct intel_vgpu *vgpu)
{
set_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status);
}
/** * intel_gvt_deactivate_vgpu - deactivate a virtual GPU * @vgpu: virtual GPU * * This function is called when user wants to deactivate a virtual GPU. * The virtual GPU will be stopped. *
*/ void intel_gvt_deactivate_vgpu(struct intel_vgpu *vgpu)
{
mutex_lock(&vgpu->vgpu_lock);
if (atomic_read(&vgpu->submission.running_workload_num)) {
mutex_unlock(&vgpu->vgpu_lock);
intel_gvt_wait_vgpu_idle(vgpu);
mutex_lock(&vgpu->vgpu_lock);
}
intel_vgpu_stop_schedule(vgpu);
mutex_unlock(&vgpu->vgpu_lock);
}
/** * intel_gvt_release_vgpu - release a virtual GPU * @vgpu: virtual GPU * * This function is called when user wants to release a virtual GPU. * The virtual GPU will be stopped and all runtime information will be * destroyed. *
*/ void intel_gvt_release_vgpu(struct intel_vgpu *vgpu)
{
intel_gvt_deactivate_vgpu(vgpu);
/** * intel_gvt_destroy_vgpu - destroy a virtual GPU * @vgpu: virtual GPU * * This function is called when user wants to destroy a virtual GPU. *
*/ void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu)
{ struct intel_gvt *gvt = vgpu->gvt; struct drm_i915_private *i915 = gvt->gt->i915;
drm_WARN(&i915->drm, test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status), "vGPU is still active!\n");
/* * remove idr first so later clean can judge if need to stop * service if no active vgpu.
*/
mutex_lock(&gvt->lock);
idr_remove(&gvt->vgpu_idr, vgpu->id);
mutex_unlock(&gvt->lock);
/** * intel_gvt_create_idle_vgpu - create an idle virtual GPU * @gvt: GVT device * * This function is called when user wants to create an idle virtual GPU. * * Returns: * pointer to intel_vgpu, error pointer if failed.
*/ struct intel_vgpu *intel_gvt_create_idle_vgpu(struct intel_gvt *gvt)
{ struct intel_vgpu *vgpu; enum intel_engine_id i; int ret;
vgpu = vzalloc(sizeof(*vgpu)); if (!vgpu) return ERR_PTR(-ENOMEM);
/** * intel_gvt_destroy_idle_vgpu - destroy an idle virtual GPU * @vgpu: virtual GPU * * This function is called when user wants to destroy an idle virtual GPU. *
*/ void intel_gvt_destroy_idle_vgpu(struct intel_vgpu *vgpu)
{
mutex_lock(&vgpu->vgpu_lock);
intel_vgpu_clean_sched_policy(vgpu);
mutex_unlock(&vgpu->vgpu_lock);
vfree(vgpu);
}
int intel_gvt_create_vgpu(struct intel_vgpu *vgpu, conststruct intel_vgpu_config *conf)
{ struct intel_gvt *gvt = vgpu->gvt; struct drm_i915_private *dev_priv = gvt->gt->i915; int ret;
ret = intel_vgpu_init_mmio(vgpu); if (ret) goto out_clean_idr;
ret = intel_vgpu_alloc_resource(vgpu, conf); if (ret) goto out_clean_vgpu_mmio;
populate_pvinfo_page(vgpu);
ret = intel_vgpu_init_gtt(vgpu); if (ret) goto out_clean_vgpu_resource;
ret = intel_vgpu_init_opregion(vgpu); if (ret) goto out_clean_gtt;
ret = intel_vgpu_init_display(vgpu, conf->edid); if (ret) goto out_clean_opregion;
ret = intel_vgpu_setup_submission(vgpu); if (ret) goto out_clean_display;
ret = intel_vgpu_init_sched_policy(vgpu); if (ret) goto out_clean_submission;
intel_gvt_debugfs_add_vgpu(vgpu);
ret = intel_gvt_set_opregion(vgpu); if (ret) goto out_clean_sched_policy;
if (IS_BROADWELL(dev_priv) || IS_BROXTON(dev_priv))
ret = intel_gvt_set_edid(vgpu, PORT_B); else
ret = intel_gvt_set_edid(vgpu, PORT_D); if (ret) goto out_clean_sched_policy;
/** * intel_gvt_reset_vgpu_locked - reset a virtual GPU by DMLR or GT reset * @vgpu: virtual GPU * @dmlr: vGPU Device Model Level Reset or GT Reset * @engine_mask: engines to reset for GT reset * * This function is called when user wants to reset a virtual GPU through * device model reset or GT reset. The caller should hold the vgpu lock. * * vGPU Device Model Level Reset (DMLR) simulates the PCI level reset to reset * the whole vGPU to default state as when it is created. This vGPU function * is required both for functionary and security concerns.The ultimate goal * of vGPU FLR is that reuse a vGPU instance by virtual machines. When we * assign a vGPU to a virtual machine we must issue such reset first. * * Full GT Reset and Per-Engine GT Reset are soft reset flow for GPU engines * (Render, Blitter, Video, Video Enhancement). It is defined by GPU Spec. * Unlike the FLR, GT reset only reset particular resource of a vGPU per * the reset request. Guest driver can issue a GT reset by programming the * virtual GDRST register to reset specific virtual GPU engine or all * engines. * * The parameter dev_level is to identify if we will do DMLR or GT reset. * The parameter engine_mask is to specific the engines that need to be * reset. If value ALL_ENGINES is given for engine_mask, it means * the caller requests a full GT reset that we will reset all virtual * GPU engines. For FLR, engine_mask is ignored.
*/ void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr,
intel_engine_mask_t engine_mask)
{ struct intel_gvt *gvt = vgpu->gvt; struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler;
intel_engine_mask_t resetting_eng = dmlr ? ALL_ENGINES : engine_mask;
intel_vgpu_stop_schedule(vgpu); /* * The current_vgpu will set to NULL after stopping the * scheduler when the reset is triggered by current vgpu.
*/ if (scheduler->current_vgpu == NULL) {
mutex_unlock(&vgpu->vgpu_lock);
intel_gvt_wait_vgpu_idle(vgpu);
mutex_lock(&vgpu->vgpu_lock);
}
intel_vgpu_reset_submission(vgpu, resetting_eng); /* full GPU reset or device model level reset */ if (engine_mask == ALL_ENGINES || dmlr) {
intel_vgpu_select_submission_ops(vgpu, ALL_ENGINES, 0); if (engine_mask == ALL_ENGINES)
intel_vgpu_invalidate_ppgtt(vgpu); /*fence will not be reset during virtual reset */ if (dmlr) { if(!vgpu->d3_entered) {
intel_vgpu_invalidate_ppgtt(vgpu);
intel_vgpu_destroy_all_ppgtt_mm(vgpu);
}
intel_vgpu_reset_ggtt(vgpu, true);
intel_vgpu_reset_resource(vgpu);
}
if (dmlr) {
intel_vgpu_reset_display(vgpu);
intel_vgpu_reset_cfg_space(vgpu); /* only reset the failsafe mode when dmlr reset */
vgpu->failsafe = false; /* * PCI_D0 is set before dmlr, so reset d3_entered here * after done using.
*/ if(vgpu->d3_entered)
vgpu->d3_entered = false; else
vgpu->pv_notified = false;
}
}
/** * intel_gvt_reset_vgpu - reset a virtual GPU (Function Level) * @vgpu: virtual GPU * * This function is called when user wants to reset a virtual GPU. *
*/ void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu)
{
mutex_lock(&vgpu->vgpu_lock);
intel_gvt_reset_vgpu_locked(vgpu, true, 0);
mutex_unlock(&vgpu->vgpu_lock);
}
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