diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/vgpu.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/vgpu.c | 409 |
1 files changed, 409 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c new file mode 100644 index 000000000000..7295bc8e12fb --- /dev/null +++ b/drivers/gpu/drm/i915/gvt/vgpu.c @@ -0,0 +1,409 @@ +/* + * 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(vgpu, vgtif_reg(magic)) = VGT_MAGIC; + vgpu_vreg(vgpu, vgtif_reg(version_major)) = 1; + vgpu_vreg(vgpu, vgtif_reg(version_minor)) = 0; + vgpu_vreg(vgpu, vgtif_reg(display_ready)) = 0; + vgpu_vreg(vgpu, vgtif_reg(vgt_id)) = vgpu->id; + vgpu_vreg(vgpu, vgtif_reg(avail_rs.mappable_gmadr.base)) = + vgpu_aperture_gmadr_base(vgpu); + vgpu_vreg(vgpu, vgtif_reg(avail_rs.mappable_gmadr.size)) = + vgpu_aperture_sz(vgpu); + vgpu_vreg(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.base)) = + vgpu_hidden_gmadr_base(vgpu); + vgpu_vreg(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.size)) = + vgpu_hidden_sz(vgpu); + + vgpu_vreg(vgpu, vgtif_reg(avail_rs.fence_num)) = vgpu_fence_sz(vgpu); + + 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); +} + +/** + * 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; + unsigned int min_low; + + /* vGPU type name is defined as GVTg_Vx_y which contains + * physical GPU generation type and 'y' means maximum vGPU + * instances user can create on one physical GPU for this + * type. + * + * 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. + * + * Currently use static size here as we init type earlier.. + */ + low_avail = MB_TO_BYTES(256) - HOST_LOW_GM_SIZE; + num_types = 4; + + gvt->types = kzalloc(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 / min_low == 0) + break; + gvt->types[i].low_gm_size = min_low; + gvt->types[i].high_gm_size = max((min_low<<3), MB_TO_BYTES(384U)); + gvt->types[i].fence = 4; + gvt->types[i].max_instance = low_avail / min_low; + gvt->types[i].avail_instance = gvt->types[i].max_instance; + + if (IS_GEN8(gvt->dev_priv)) + sprintf(gvt->types[i].name, "GVTg_V4_%u", + gvt->types[i].max_instance); + else if (IS_GEN9(gvt->dev_priv)) + sprintf(gvt->types[i].name, "GVTg_V5_%u", + gvt->types[i].max_instance); + + min_low <<= 1; + gvt_dbg_core("type[%d]: %s max %u avail %u low %u high %u fence %u\n", + i, gvt->types[i].name, gvt->types[i].max_instance, + gvt->types[i].avail_instance, + gvt->types[i].low_gm_size, + gvt->types[i].high_gm_size, gvt->types[i].fence); + } + + 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, total_min; + + /* Need to depend on maxium hw resource size but keep on + * static config for now. + */ + low_gm_avail = MB_TO_BYTES(256) - HOST_LOW_GM_SIZE - + gvt->gm.vgpu_allocated_low_gm_size; + high_gm_avail = MB_TO_BYTES(256) * 8UL - 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; + total_min = min(min(low_gm_min, high_gm_min), fence_min); + gvt->types[i].avail_instance = min(gvt->types[i].max_instance, + total_min); + + gvt_dbg_core("update type[%d]: %s max %u avail %u low %u high %u fence %u\n", + i, gvt->types[i].name, gvt->types[i].max_instance, + gvt->types[i].avail_instance, gvt->types[i].low_gm_size, + gvt->types[i].high_gm_size, gvt->types[i].fence); + } +} + +/** + * 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(&gvt->lock); + + vgpu->active = false; + idr_remove(&gvt->vgpu_idr, vgpu->id); + + if (atomic_read(&vgpu->running_workload_num)) { + mutex_unlock(&gvt->lock); + intel_gvt_wait_vgpu_idle(vgpu); + mutex_lock(&gvt->lock); + } + + intel_vgpu_stop_schedule(vgpu); + intel_vgpu_clean_sched_policy(vgpu); + intel_vgpu_clean_gvt_context(vgpu); + intel_vgpu_clean_execlist(vgpu); + intel_vgpu_clean_display(vgpu); + intel_vgpu_clean_opregion(vgpu); + intel_vgpu_clean_gtt(vgpu); + intel_gvt_hypervisor_detach_vgpu(vgpu); + intel_vgpu_free_resource(vgpu); + intel_vgpu_clean_mmio(vgpu); + vfree(vgpu); + + intel_gvt_update_vgpu_types(gvt); + mutex_unlock(&gvt->lock); +} + +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); + + mutex_lock(&gvt->lock); + + ret = idr_alloc(&gvt->vgpu_idr, vgpu, 1, GVT_MAX_VGPU, GFP_KERNEL); + if (ret < 0) + goto out_free_vgpu; + + vgpu->id = ret; + vgpu->handle = param->handle; + vgpu->gvt = gvt; + bitmap_zero(vgpu->tlb_handle_pending, I915_NUM_ENGINES); + + 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_display(vgpu); + if (ret) + goto out_clean_gtt; + + ret = intel_vgpu_init_execlist(vgpu); + if (ret) + goto out_clean_display; + + ret = intel_vgpu_init_gvt_context(vgpu); + if (ret) + goto out_clean_execlist; + + ret = intel_vgpu_init_sched_policy(vgpu); + if (ret) + goto out_clean_shadow_ctx; + + vgpu->active = true; + mutex_unlock(&gvt->lock); + + return vgpu; + +out_clean_shadow_ctx: + intel_vgpu_clean_gvt_context(vgpu); +out_clean_execlist: + intel_vgpu_clean_execlist(vgpu); +out_clean_display: + intel_vgpu_clean_display(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); + mutex_unlock(&gvt->lock); + 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; + + /* 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); + + vgpu = __intel_gvt_create_vgpu(gvt, ¶m); + if (IS_ERR(vgpu)) + return vgpu; + + /* calculate left instance change for types */ + intel_gvt_update_vgpu_types(gvt); + + 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 gvt 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, + unsigned int engine_mask) +{ + struct intel_gvt *gvt = vgpu->gvt; + struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler; + + gvt_dbg_core("------------------------------------------\n"); + gvt_dbg_core("resseting vgpu%d, dmlr %d, engine_mask %08x\n", + vgpu->id, dmlr, engine_mask); + vgpu->resetting = true; + + 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(&gvt->lock); + intel_gvt_wait_vgpu_idle(vgpu); + mutex_lock(&gvt->lock); + } + + intel_vgpu_reset_execlist(vgpu, dmlr ? ALL_ENGINES : engine_mask); + + /* full GPU reset or device model level reset */ + if (engine_mask == ALL_ENGINES || dmlr) { + intel_vgpu_reset_gtt(vgpu, dmlr); + intel_vgpu_reset_resource(vgpu); + intel_vgpu_reset_mmio(vgpu); + populate_pvinfo_page(vgpu); + + if (dmlr) + intel_vgpu_reset_cfg_space(vgpu); + } + + vgpu->resetting = false; + 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->gvt->lock); + intel_gvt_reset_vgpu_locked(vgpu, true, 0); + mutex_unlock(&vgpu->gvt->lock); +} |