/*
* 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>
*
*/
#include "i915_drv.h"
#include "gvt.h"
#include "i915_pvinfo.h"
void populate_pvinfo_page(struct intel_vgpu *vgpu)
{
/* setup the ballooning information */
vgpu_vreg64_t(vgpu, vgtif_reg(magic)) = VGT_MAGIC;
vgpu_vreg_t(vgpu, vgtif_reg(version_major)) = 1;
vgpu_vreg_t(vgpu, vgtif_reg(version_minor)) = 0;
vgpu_vreg_t(vgpu, vgtif_reg(display_ready)) = 0;
vgpu_vreg_t(vgpu, vgtif_reg(vgt_id)) = vgpu->id;
vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) = VGT_CAPS_FULL_PPGTT;
vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) |= VGT_CAPS_HWSP_EMULATION;
vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) |= VGT_CAPS_HUGE_GTT;
vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.mappable_gmadr.base)) =
vgpu_aperture_gmadr_base(vgpu);
vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.mappable_gmadr.size)) =
vgpu_aperture_sz(vgpu);
vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.base)) =
vgpu_hidden_gmadr_base(vgpu);
vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.size)) =
vgpu_hidden_sz(vgpu);
vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.fence_num)) = vgpu_fence_sz(vgpu);
vgpu_vreg_t(vgpu, vgtif_reg(cursor_x_hot)) = UINT_MAX;
vgpu_vreg_t(vgpu, vgtif_reg(cursor_y_hot)) = UINT_MAX;
gvt_dbg_core("Populate PVINFO PAGE for vGPU %d\n", vgpu->id);
gvt_dbg_core("aperture base [GMADR] 0x%llx size 0x%llx\n",
vgpu_aperture_gmadr_base(vgpu), vgpu_aperture_sz(vgpu));
gvt_dbg_core("hidden base [GMADR] 0x%llx size=0x%llx\n",
vgpu_hidden_gmadr_base(vgpu), vgpu_hidden_sz(vgpu));
gvt_dbg_core("fence size %d\n", vgpu_fence_sz(vgpu));
WARN_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
}
#define VGPU_MAX_WEIGHT 16
#define VGPU_WEIGHT(vgpu_num) \
(VGPU_MAX_WEIGHT / (vgpu_num))
static struct {
unsigned int low_mm;
unsigned int high_mm;
unsigned int fence;
/* A vGPU with a weight of 8 will get twice as much GPU as a vGPU
* with a weight of 4 on a contended host, different vGPU type has
* different weight set. Legal weights range from 1 to 16.
*/
unsigned int weight;
enum intel_vgpu_edid edid;
char *name;
} vgpu_types[] = {
/* Fixed vGPU type table */
{ MB_TO_BYTES(64), MB_TO_BYTES(384), 4, VGPU_WEIGHT(8), GVT_EDID_1024_768, "8" },
{ MB_TO_BYTES(128), MB_TO_BYTES(512), 4, VGPU_WEIGHT(4), GVT_EDID_1920_1200, "4" },
{ MB_TO_BYTES(256), MB_TO_BYTES(1024), 4, VGPU_WEIGHT(2), GVT_EDID_1920_1200, "2" },
{ MB_TO_BYTES(512), MB_TO_BYTES(2048), 4, VGPU_WEIGHT(1), GVT_EDID_1920_1200, "1" },
};
/**
* intel_gvt_init_vgpu_types - initialize vGPU type list
* @gvt : GVT device
*
* Initialize vGPU type list based on available resource.
*
*/
int intel_gvt_init_vgpu_types(struct intel_gvt *gvt)
{
unsigned int num_types;
unsigned int i, low_avail, high_avail;
unsigned int min_low;
/* vGPU type name is defined as GVTg_Vx_y which contains
* physical GPU generation type (e.g V4 as BDW server, V5 as
* SKL server).
*
* Depend on physical SKU resource, 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 "avail_instance"
* to indicate how many vGPU instance can be created for this
* type.
*
*/
low_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE;
high_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE;
num_types = sizeof(vgpu_types) / sizeof(vgpu_types[0]);
gvt->types = kcalloc(num_types, sizeof(struct intel_vgpu_type),
GFP_KERNEL);
if (!gvt->types)
return -ENOMEM;
min_low = MB_TO_BYTES(32);
for (i = 0; i < num_types; ++i) {
if (low_avail / vgpu_types[i].low_mm == 0)
break;
gvt->types[i].low_gm_size = vgpu_types[i].low_mm;
gvt->types[i].high_gm_size = vgpu_types[i].high_mm;
gvt->types[i].fence = vgpu_types[i].fence;
if (vgpu_types[i].weight < 1 ||
vgpu_types[i].weight > VGPU_MAX_WEIGHT)
return -EINVAL;
gvt->types[i].weight = vgpu_types[i].weight;
gvt->types[i].resolution = vgpu_types[i].edid;
gvt->types[i].avail_instance = min(low_avail / vgpu_types[i].low_mm,
high_avail / vgpu_types[i].high_mm);
if (IS_GEN(gvt->dev_priv, 8))
sprintf(gvt->types[i].name, "GVTg_V4_%s",
vgpu_types[i].name);
else if (IS_GEN(gvt->dev_priv, 9))
sprintf(gvt->types[i].name, "GVTg_V5_%s",
vgpu_types[i].name);
gvt_dbg_core("type[%d]: %s avail %u low %u high %u fence %u weight %u res %s\n",
i, gvt->types[i].name,
gvt->types[i].avail_instance,
gvt->types[i].low_gm_size,
gvt->types[i].high_gm_size, gvt->types[i].fence,
gvt->types[i].weight,
vgpu_edid_str(gvt->types[i].resolution));
}
gvt->num_types = i;
return 0;
}
void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt)
{
kfree(gvt->types);
}
static void intel_gvt_update_vgpu_types(struct intel_gvt *gvt)
{
int i;
unsigned int low_gm_avail, high_gm_avail, fence_avail;
unsigned int low_gm_min, high_gm_min, fence_min;
/* Need to depend on maxium hw resource size but keep on
* static config for now.
*/
low_gm_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE -
gvt->gm.vgpu_allocated_low_gm_size;
high_gm_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE -
gvt->gm.vgpu_allocated_high_gm_size;
fence_avail = gvt_fence_sz(gvt) - HOST_FENCE -
gvt->fence.vgpu_allocated_fence_num;
for (i = 0; i < gvt->num_types; i++) {
low_gm_min = low_gm_avail / gvt->types[i].low_gm_size;
high_gm_min = high_gm_avail / gvt->types[i].high_gm_size;
fence_min = fence_avail / gvt->types[i].fence;
gvt->types[i].avail_instance = min(min(low_gm_min, high_gm_min),
fence_min);
gvt_dbg_core("update type[%d]: %s avail %u low %u high %u fence %u\n",
i, gvt->types[i].name,
gvt->types[i].avail_instance, gvt->types[i].low_gm_size,
gvt->types[i].high_gm_size, gvt->types[i].fence);
}
}
/**
* intel_gvt_active_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)
{
mutex_lock(&vgpu->gvt->lock);
vgpu->active = true;
mutex_unlock(&vgpu->gvt->lock);
}
/**
* intel_gvt_deactive_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);
vgpu->active = false;
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);
mutex_lock(&vgpu->vgpu_lock);
intel_vgpu_clean_workloads(vgpu, ALL_ENGINES);
intel_vgpu_dmabuf_cleanup(vgpu);
mutex_unlock(&vgpu->vgpu_lock);
}
/**
* 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;
mutex_lock(&vgpu->vgpu_lock);
WARN(vgpu->active, "vGPU is still active!\n");
intel_gvt_debugfs_remove_vgpu(vgpu);
intel_vgpu_clean_sched_policy(vgpu);
intel_vgpu_clean_submission(vgpu);
intel_vgpu_clean_display(vgpu);
intel_vgpu_clean_opregion(vgpu);
intel_vgpu_reset_ggtt(vgpu, true);
intel_vgpu_clean_gtt(vgpu);
intel_gvt_hypervisor_detach_vgpu(vgpu);
intel_vgpu_free_resource(vgpu);
intel_vgpu_clean_mmio(vgpu);
intel_vgpu_dmabuf_cleanup(vgpu);
mutex_unlock(&vgpu->vgpu_lock);
mutex_lock(&gvt->lock);
idr_remove(&gvt->vgpu_idr, vgpu->id);
if (idr_is_empty(&gvt->vgpu_idr))
intel_gvt_clean_irq(gvt);
intel_gvt_update_vgpu_types(gvt);
mutex_unlock(&gvt->lock);
vfree(vgpu);
}
#define IDLE_VGPU_IDR 0
/**
* 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);
vgpu->id = IDLE_VGPU_IDR;
vgpu->gvt = gvt;
mutex_init(&vgpu->vgpu_lock);
for (i = 0; i < I915_NUM_ENGINES; i++)
INIT_LIST_HEAD(&vgpu->submission.workload_q_head[i]);
ret = intel_vgpu_init_sched_policy(vgpu);
if (ret)
goto out_free_vgpu;
vgpu->active = false;
return vgpu;
out_free_vgpu:
vfree(vgpu);
return ERR_PTR(ret);
}
/**
* intel_gvt_destroy_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);
}
static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
struct intel_vgpu_creation_params *param)
{
struct intel_vgpu *vgpu;
int ret;
gvt_dbg_core("handle %llu low %llu MB high %llu MB fence %llu\n",
param->handle, param->low_gm_sz, param->high_gm_sz,
param->fence_sz);
vgpu = vzalloc(sizeof(*vgpu));
if (!vgpu)
return ERR_PTR(-ENOMEM);
ret = idr_alloc(&gvt->vgpu_idr, vgpu, IDLE_VGPU_IDR + 1, GVT_MAX_VGPU,
GFP_KERNEL);
if (ret < 0)
goto out_free_vgpu;
vgpu->id = ret;
vgpu->handle = param->handle;
vgpu->gvt = gvt;
vgpu->sched_ctl.weight = param->weight;
mutex_init(&vgpu->vgpu_lock);
mutex_init(&vgpu->dmabuf_lock);
INIT_LIST_HEAD(&vgpu->dmabuf_obj_list_head);
INIT_RADIX_TREE(&vgpu->page_track_tree, GFP_KERNEL);
idr_init(&vgpu->object_idr);
intel_vgpu_init_cfg_space(vgpu, param->primary);
ret = intel_vgpu_init_mmio(vgpu);
if (ret)
goto out_clean_idr;
ret = intel_vgpu_alloc_resource(vgpu, param);
if (ret)
goto out_clean_vgpu_mmio;
populate_pvinfo_page(vgpu);
ret = intel_gvt_hypervisor_attach_vgpu(vgpu);
if (ret)
goto out_clean_vgpu_resource;
ret = intel_vgpu_init_gtt(vgpu);
if (ret)
goto out_detach_hypervisor_vgpu;
ret = intel_vgpu_init_opregion(vgpu);
if (ret)
goto out_clean_gtt;
ret = intel_vgpu_init_display(vgpu, param->resolution);
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;
ret = intel_gvt_debugfs_add_vgpu(vgpu);
if (ret)
goto out_clean_sched_policy;
ret = intel_gvt_hypervisor_set_opregion(vgpu);
if (ret)
goto out_clean_sched_policy;
/*TODO: add more platforms support */
if (IS_SKYLAKE(gvt->dev_priv) || IS_KABYLAKE(gvt->dev_priv))
ret = intel_gvt_hypervisor_set_edid(vgpu, PORT_D);
if (ret)
goto out_clean_sched_policy;
return vgpu;
out_clean_sched_policy:
intel_vgpu_clean_sched_policy(vgpu);
out_clean_submission:
intel_vgpu_clean_submission(vgpu);
out_clean_display:
intel_vgpu_clean_display(vgpu);
out_clean_opregion:
intel_vgpu_clean_opregion(vgpu);
out_clean_gtt:
intel_vgpu_clean_gtt(vgpu);
out_detach_hypervisor_vgpu:
intel_gvt_hypervisor_detach_vgpu(vgpu);
out_clean_vgpu_resource:
intel_vgpu_free_resource(vgpu);
out_clean_vgpu_mmio:
intel_vgpu_clean_mmio(vgpu);
out_clean_idr:
idr_remove(&gvt->vgpu_idr, vgpu->id);
out_free_vgpu:
vfree(vgpu);
return ERR_PTR(ret);
}
/**
* intel_gvt_create_vgpu - create a virtual GPU
* @gvt: GVT device
* @type: type of the vGPU to create
*
* This function is called when user wants to create a virtual GPU.
*
* Returns:
* pointer to intel_vgpu, error pointer if failed.
*/
struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt,
struct intel_vgpu_type *type)
{
struct intel_vgpu_creation_params param;
struct intel_vgpu *vgpu;
param.handle = 0;
param.primary = 1;
param.low_gm_sz = type->low_gm_size;
param.high_gm_sz = type->high_gm_size;
param.fence_sz = type->fence;
param.weight = type->weight;
param.resolution = type->resolution;
/* XXX current param based on MB */
param.low_gm_sz = BYTES_TO_MB(param.low_gm_sz);
param.high_gm_sz = BYTES_TO_MB(param.high_gm_sz);
mutex_lock(&gvt->lock);
vgpu = __intel_gvt_create_vgpu(gvt, ¶m);
if (!IS_ERR(vgpu))
/* calculate left instance change for types */
intel_gvt_update_vgpu_types(gvt);
mutex_unlock(&gvt->lock);
return vgpu;
}
/**
* 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 isse 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
* resetted. 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;
gvt_dbg_core("------------------------------------------\n");
gvt_dbg_core("resseting vgpu%d, dmlr %d, engine_mask %08x\n",
vgpu->id, dmlr, engine_mask);
vgpu->resetting_eng = resetting_eng;
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);
intel_vgpu_invalidate_ppgtt(vgpu);
/*fence will not be reset during virtual reset */
if (dmlr) {
intel_vgpu_reset_gtt(vgpu);
intel_vgpu_reset_resource(vgpu);
}
intel_vgpu_reset_mmio(vgpu, dmlr);
populate_pvinfo_page(vgpu);
intel_vgpu_reset_display(vgpu);
if (dmlr) {
intel_vgpu_reset_cfg_space(vgpu);
/* only reset the failsafe mode when dmlr reset */
vgpu->failsafe = false;
vgpu->pv_notified = false;
}
}
vgpu->resetting_eng = 0;
gvt_dbg_core("reset vgpu%d done\n", vgpu->id);
gvt_dbg_core("------------------------------------------\n");
}
/**
* 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);
}
