diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/scheduler.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/scheduler.c | 670 |
1 files changed, 625 insertions, 45 deletions
diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c index 69f8f0d155b9..0056638b0c16 100644 --- a/drivers/gpu/drm/i915/gvt/scheduler.c +++ b/drivers/gpu/drm/i915/gvt/scheduler.c @@ -57,7 +57,7 @@ static int populate_shadow_context(struct intel_vgpu_workload *workload) struct intel_vgpu *vgpu = workload->vgpu; struct intel_gvt *gvt = vgpu->gvt; int ring_id = workload->ring_id; - struct i915_gem_context *shadow_ctx = workload->vgpu->shadow_ctx; + struct i915_gem_context *shadow_ctx = vgpu->submission.shadow_ctx; struct drm_i915_gem_object *ctx_obj = shadow_ctx->engine[ring_id].state->obj; struct execlist_ring_context *shadow_ring_context; @@ -81,16 +81,16 @@ static int populate_shadow_context(struct intel_vgpu_workload *workload) while (i < context_page_num) { context_gpa = intel_vgpu_gma_to_gpa(vgpu->gtt.ggtt_mm, (u32)((workload->ctx_desc.lrca + i) << - GTT_PAGE_SHIFT)); + I915_GTT_PAGE_SHIFT)); if (context_gpa == INTEL_GVT_INVALID_ADDR) { gvt_vgpu_err("Invalid guest context descriptor\n"); - return -EINVAL; + return -EFAULT; } page = i915_gem_object_get_page(ctx_obj, LRC_HEADER_PAGES + i); dst = kmap(page); intel_gvt_hypervisor_read_gpa(vgpu, context_gpa, dst, - GTT_PAGE_SIZE); + I915_GTT_PAGE_SIZE); kunmap(page); i++; } @@ -120,7 +120,7 @@ static int populate_shadow_context(struct intel_vgpu_workload *workload) sizeof(*shadow_ring_context), (void *)shadow_ring_context + sizeof(*shadow_ring_context), - GTT_PAGE_SIZE - sizeof(*shadow_ring_context)); + I915_GTT_PAGE_SIZE - sizeof(*shadow_ring_context)); kunmap(page); return 0; @@ -248,7 +248,7 @@ static int copy_workload_to_ring_buffer(struct intel_vgpu_workload *workload) return 0; } -void release_shadow_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx) +static void release_shadow_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx) { if (!wa_ctx->indirect_ctx.obj) return; @@ -267,11 +267,12 @@ void release_shadow_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx) */ int intel_gvt_scan_and_shadow_workload(struct intel_vgpu_workload *workload) { + struct intel_vgpu *vgpu = workload->vgpu; + struct intel_vgpu_submission *s = &vgpu->submission; + struct i915_gem_context *shadow_ctx = s->shadow_ctx; + struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv; int ring_id = workload->ring_id; - struct i915_gem_context *shadow_ctx = workload->vgpu->shadow_ctx; - struct drm_i915_private *dev_priv = workload->vgpu->gvt->dev_priv; struct intel_engine_cs *engine = dev_priv->engine[ring_id]; - struct intel_vgpu *vgpu = workload->vgpu; struct intel_ring *ring; int ret; @@ -284,7 +285,7 @@ int intel_gvt_scan_and_shadow_workload(struct intel_vgpu_workload *workload) shadow_ctx->desc_template |= workload->ctx_desc.addressing_mode << GEN8_CTX_ADDRESSING_MODE_SHIFT; - if (!test_and_set_bit(ring_id, vgpu->shadow_ctx_desc_updated)) + if (!test_and_set_bit(ring_id, s->shadow_ctx_desc_updated)) shadow_context_descriptor_update(shadow_ctx, dev_priv->engine[ring_id]); @@ -327,14 +328,15 @@ err_scan: return ret; } -int intel_gvt_generate_request(struct intel_vgpu_workload *workload) +static int intel_gvt_generate_request(struct intel_vgpu_workload *workload) { int ring_id = workload->ring_id; struct drm_i915_private *dev_priv = workload->vgpu->gvt->dev_priv; struct intel_engine_cs *engine = dev_priv->engine[ring_id]; struct drm_i915_gem_request *rq; struct intel_vgpu *vgpu = workload->vgpu; - struct i915_gem_context *shadow_ctx = vgpu->shadow_ctx; + struct intel_vgpu_submission *s = &vgpu->submission; + struct i915_gem_context *shadow_ctx = s->shadow_ctx; int ret; rq = i915_gem_request_alloc(dev_priv->engine[ring_id], shadow_ctx); @@ -358,11 +360,203 @@ err_unpin: return ret; } +static void release_shadow_batch_buffer(struct intel_vgpu_workload *workload); + +static int prepare_shadow_batch_buffer(struct intel_vgpu_workload *workload) +{ + struct intel_gvt *gvt = workload->vgpu->gvt; + const int gmadr_bytes = gvt->device_info.gmadr_bytes_in_cmd; + struct intel_vgpu_shadow_bb *bb; + int ret; + + list_for_each_entry(bb, &workload->shadow_bb, list) { + bb->vma = i915_gem_object_ggtt_pin(bb->obj, NULL, 0, 0, 0); + if (IS_ERR(bb->vma)) { + ret = PTR_ERR(bb->vma); + goto err; + } + + /* relocate shadow batch buffer */ + bb->bb_start_cmd_va[1] = i915_ggtt_offset(bb->vma); + if (gmadr_bytes == 8) + bb->bb_start_cmd_va[2] = 0; + + /* No one is going to touch shadow bb from now on. */ + if (bb->clflush & CLFLUSH_AFTER) { + drm_clflush_virt_range(bb->va, bb->obj->base.size); + bb->clflush &= ~CLFLUSH_AFTER; + } + + ret = i915_gem_object_set_to_gtt_domain(bb->obj, false); + if (ret) + goto err; + + i915_gem_obj_finish_shmem_access(bb->obj); + bb->accessing = false; + + i915_vma_move_to_active(bb->vma, workload->req, 0); + } + return 0; +err: + release_shadow_batch_buffer(workload); + return ret; +} + +static int update_wa_ctx_2_shadow_ctx(struct intel_shadow_wa_ctx *wa_ctx) +{ + struct intel_vgpu_workload *workload = container_of(wa_ctx, + struct intel_vgpu_workload, + wa_ctx); + int ring_id = workload->ring_id; + struct intel_vgpu_submission *s = &workload->vgpu->submission; + struct i915_gem_context *shadow_ctx = s->shadow_ctx; + struct drm_i915_gem_object *ctx_obj = + shadow_ctx->engine[ring_id].state->obj; + struct execlist_ring_context *shadow_ring_context; + struct page *page; + + page = i915_gem_object_get_page(ctx_obj, LRC_STATE_PN); + shadow_ring_context = kmap_atomic(page); + + shadow_ring_context->bb_per_ctx_ptr.val = + (shadow_ring_context->bb_per_ctx_ptr.val & + (~PER_CTX_ADDR_MASK)) | wa_ctx->per_ctx.shadow_gma; + shadow_ring_context->rcs_indirect_ctx.val = + (shadow_ring_context->rcs_indirect_ctx.val & + (~INDIRECT_CTX_ADDR_MASK)) | wa_ctx->indirect_ctx.shadow_gma; + + kunmap_atomic(shadow_ring_context); + return 0; +} + +static int prepare_shadow_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx) +{ + struct i915_vma *vma; + unsigned char *per_ctx_va = + (unsigned char *)wa_ctx->indirect_ctx.shadow_va + + wa_ctx->indirect_ctx.size; + + if (wa_ctx->indirect_ctx.size == 0) + return 0; + + vma = i915_gem_object_ggtt_pin(wa_ctx->indirect_ctx.obj, NULL, + 0, CACHELINE_BYTES, 0); + if (IS_ERR(vma)) + return PTR_ERR(vma); + + /* FIXME: we are not tracking our pinned VMA leaving it + * up to the core to fix up the stray pin_count upon + * free. + */ + + wa_ctx->indirect_ctx.shadow_gma = i915_ggtt_offset(vma); + + wa_ctx->per_ctx.shadow_gma = *((unsigned int *)per_ctx_va + 1); + memset(per_ctx_va, 0, CACHELINE_BYTES); + + update_wa_ctx_2_shadow_ctx(wa_ctx); + return 0; +} + +static void release_shadow_batch_buffer(struct intel_vgpu_workload *workload) +{ + struct intel_vgpu *vgpu = workload->vgpu; + struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv; + struct intel_vgpu_shadow_bb *bb, *pos; + + if (list_empty(&workload->shadow_bb)) + return; + + bb = list_first_entry(&workload->shadow_bb, + struct intel_vgpu_shadow_bb, list); + + mutex_lock(&dev_priv->drm.struct_mutex); + + list_for_each_entry_safe(bb, pos, &workload->shadow_bb, list) { + if (bb->obj) { + if (bb->accessing) + i915_gem_obj_finish_shmem_access(bb->obj); + + if (bb->va && !IS_ERR(bb->va)) + i915_gem_object_unpin_map(bb->obj); + + if (bb->vma && !IS_ERR(bb->vma)) { + i915_vma_unpin(bb->vma); + i915_vma_close(bb->vma); + } + __i915_gem_object_release_unless_active(bb->obj); + } + list_del(&bb->list); + kfree(bb); + } + + mutex_unlock(&dev_priv->drm.struct_mutex); +} + +static int prepare_workload(struct intel_vgpu_workload *workload) +{ + struct intel_vgpu *vgpu = workload->vgpu; + int ret = 0; + + ret = intel_vgpu_pin_mm(workload->shadow_mm); + if (ret) { + gvt_vgpu_err("fail to vgpu pin mm\n"); + return ret; + } + + ret = intel_vgpu_sync_oos_pages(workload->vgpu); + if (ret) { + gvt_vgpu_err("fail to vgpu sync oos pages\n"); + goto err_unpin_mm; + } + + ret = intel_vgpu_flush_post_shadow(workload->vgpu); + if (ret) { + gvt_vgpu_err("fail to flush post shadow\n"); + goto err_unpin_mm; + } + + ret = intel_gvt_generate_request(workload); + if (ret) { + gvt_vgpu_err("fail to generate request\n"); + goto err_unpin_mm; + } + + ret = prepare_shadow_batch_buffer(workload); + if (ret) { + gvt_vgpu_err("fail to prepare_shadow_batch_buffer\n"); + goto err_unpin_mm; + } + + ret = prepare_shadow_wa_ctx(&workload->wa_ctx); + if (ret) { + gvt_vgpu_err("fail to prepare_shadow_wa_ctx\n"); + goto err_shadow_batch; + } + + if (workload->prepare) { + ret = workload->prepare(workload); + if (ret) + goto err_shadow_wa_ctx; + } + + return 0; +err_shadow_wa_ctx: + release_shadow_wa_ctx(&workload->wa_ctx); +err_shadow_batch: + release_shadow_batch_buffer(workload); +err_unpin_mm: + intel_vgpu_unpin_mm(workload->shadow_mm); + return ret; +} + static int dispatch_workload(struct intel_vgpu_workload *workload) { + struct intel_vgpu *vgpu = workload->vgpu; + struct intel_vgpu_submission *s = &vgpu->submission; + struct i915_gem_context *shadow_ctx = s->shadow_ctx; + struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv; int ring_id = workload->ring_id; - struct i915_gem_context *shadow_ctx = workload->vgpu->shadow_ctx; - struct drm_i915_private *dev_priv = workload->vgpu->gvt->dev_priv; struct intel_engine_cs *engine = dev_priv->engine[ring_id]; int ret = 0; @@ -375,12 +569,10 @@ static int dispatch_workload(struct intel_vgpu_workload *workload) if (ret) goto out; - if (workload->prepare) { - ret = workload->prepare(workload); - if (ret) { - engine->context_unpin(engine, shadow_ctx); - goto out; - } + ret = prepare_workload(workload); + if (ret) { + engine->context_unpin(engine, shadow_ctx); + goto out; } out: @@ -448,7 +640,7 @@ static struct intel_vgpu_workload *pick_next_workload( gvt_dbg_sched("ring id %d pick new workload %p\n", ring_id, workload); - atomic_inc(&workload->vgpu->running_workload_num); + atomic_inc(&workload->vgpu->submission.running_workload_num); out: mutex_unlock(&gvt->lock); return workload; @@ -458,8 +650,9 @@ static void update_guest_context(struct intel_vgpu_workload *workload) { struct intel_vgpu *vgpu = workload->vgpu; struct intel_gvt *gvt = vgpu->gvt; + struct intel_vgpu_submission *s = &vgpu->submission; + struct i915_gem_context *shadow_ctx = s->shadow_ctx; int ring_id = workload->ring_id; - struct i915_gem_context *shadow_ctx = workload->vgpu->shadow_ctx; struct drm_i915_gem_object *ctx_obj = shadow_ctx->engine[ring_id].state->obj; struct execlist_ring_context *shadow_ring_context; @@ -483,7 +676,7 @@ static void update_guest_context(struct intel_vgpu_workload *workload) while (i < context_page_num) { context_gpa = intel_vgpu_gma_to_gpa(vgpu->gtt.ggtt_mm, (u32)((workload->ctx_desc.lrca + i) << - GTT_PAGE_SHIFT)); + I915_GTT_PAGE_SHIFT)); if (context_gpa == INTEL_GVT_INVALID_ADDR) { gvt_vgpu_err("invalid guest context descriptor\n"); return; @@ -492,7 +685,7 @@ static void update_guest_context(struct intel_vgpu_workload *workload) page = i915_gem_object_get_page(ctx_obj, LRC_HEADER_PAGES + i); src = kmap(page); intel_gvt_hypervisor_write_gpa(vgpu, context_gpa, src, - GTT_PAGE_SIZE); + I915_GTT_PAGE_SIZE); kunmap(page); i++; } @@ -517,23 +710,41 @@ static void update_guest_context(struct intel_vgpu_workload *workload) sizeof(*shadow_ring_context), (void *)shadow_ring_context + sizeof(*shadow_ring_context), - GTT_PAGE_SIZE - sizeof(*shadow_ring_context)); + I915_GTT_PAGE_SIZE - sizeof(*shadow_ring_context)); kunmap(page); } +static void clean_workloads(struct intel_vgpu *vgpu, unsigned long engine_mask) +{ + struct intel_vgpu_submission *s = &vgpu->submission; + struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv; + struct intel_engine_cs *engine; + struct intel_vgpu_workload *pos, *n; + unsigned int tmp; + + /* free the unsubmited workloads in the queues. */ + for_each_engine_masked(engine, dev_priv, engine_mask, tmp) { + list_for_each_entry_safe(pos, n, + &s->workload_q_head[engine->id], list) { + list_del_init(&pos->list); + intel_vgpu_destroy_workload(pos); + } + clear_bit(engine->id, s->shadow_ctx_desc_updated); + } +} + static void complete_current_workload(struct intel_gvt *gvt, int ring_id) { struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler; - struct intel_vgpu_workload *workload; - struct intel_vgpu *vgpu; + struct intel_vgpu_workload *workload = + scheduler->current_workload[ring_id]; + struct intel_vgpu *vgpu = workload->vgpu; + struct intel_vgpu_submission *s = &vgpu->submission; int event; mutex_lock(&gvt->lock); - workload = scheduler->current_workload[ring_id]; - vgpu = workload->vgpu; - /* For the workload w/ request, needs to wait for the context * switch to make sure request is completed. * For the workload w/o request, directly complete the workload. @@ -570,7 +781,7 @@ static void complete_current_workload(struct intel_gvt *gvt, int ring_id) } mutex_lock(&dev_priv->drm.struct_mutex); /* unpin shadow ctx as the shadow_ctx update is done */ - engine->context_unpin(engine, workload->vgpu->shadow_ctx); + engine->context_unpin(engine, s->shadow_ctx); mutex_unlock(&dev_priv->drm.struct_mutex); } @@ -580,9 +791,32 @@ static void complete_current_workload(struct intel_gvt *gvt, int ring_id) scheduler->current_workload[ring_id] = NULL; list_del_init(&workload->list); + + if (!workload->status) { + release_shadow_batch_buffer(workload); + release_shadow_wa_ctx(&workload->wa_ctx); + } + + if (workload->status || (vgpu->resetting_eng & ENGINE_MASK(ring_id))) { + /* if workload->status is not successful means HW GPU + * has occurred GPU hang or something wrong with i915/GVT, + * and GVT won't inject context switch interrupt to guest. + * So this error is a vGPU hang actually to the guest. + * According to this we should emunlate a vGPU hang. If + * there are pending workloads which are already submitted + * from guest, we should clean them up like HW GPU does. + * + * if it is in middle of engine resetting, the pending + * workloads won't be submitted to HW GPU and will be + * cleaned up during the resetting process later, so doing + * the workload clean up here doesn't have any impact. + **/ + clean_workloads(vgpu, ENGINE_MASK(ring_id)); + } + workload->complete(workload); - atomic_dec(&vgpu->running_workload_num); + atomic_dec(&s->running_workload_num); wake_up(&scheduler->workload_complete_wq); if (gvt->scheduler.need_reschedule) @@ -665,20 +899,23 @@ complete: FORCEWAKE_ALL); intel_runtime_pm_put(gvt->dev_priv); + if (ret && (vgpu_is_vm_unhealthy(ret))) + enter_failsafe_mode(vgpu, GVT_FAILSAFE_GUEST_ERR); } return 0; } void intel_gvt_wait_vgpu_idle(struct intel_vgpu *vgpu) { + struct intel_vgpu_submission *s = &vgpu->submission; struct intel_gvt *gvt = vgpu->gvt; struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler; - if (atomic_read(&vgpu->running_workload_num)) { + if (atomic_read(&s->running_workload_num)) { gvt_dbg_sched("wait vgpu idle\n"); wait_event(scheduler->workload_complete_wq, - !atomic_read(&vgpu->running_workload_num)); + !atomic_read(&s->running_workload_num)); } } @@ -743,26 +980,369 @@ err: return ret; } -void intel_vgpu_clean_gvt_context(struct intel_vgpu *vgpu) +/** + * intel_vgpu_clean_submission - free submission-related resource for vGPU + * @vgpu: a vGPU + * + * This function is called when a vGPU is being destroyed. + * + */ +void intel_vgpu_clean_submission(struct intel_vgpu *vgpu) { - i915_gem_context_put(vgpu->shadow_ctx); + struct intel_vgpu_submission *s = &vgpu->submission; + + intel_vgpu_select_submission_ops(vgpu, 0); + i915_gem_context_put(s->shadow_ctx); + kmem_cache_destroy(s->workloads); } -int intel_vgpu_init_gvt_context(struct intel_vgpu *vgpu) + +/** + * intel_vgpu_reset_submission - reset submission-related resource for vGPU + * @vgpu: a vGPU + * @engine_mask: engines expected to be reset + * + * This function is called when a vGPU is being destroyed. + * + */ +void intel_vgpu_reset_submission(struct intel_vgpu *vgpu, + unsigned long engine_mask) { - atomic_set(&vgpu->running_workload_num, 0); + struct intel_vgpu_submission *s = &vgpu->submission; - vgpu->shadow_ctx = i915_gem_context_create_gvt( + if (!s->active) + return; + + clean_workloads(vgpu, engine_mask); + s->ops->reset(vgpu, engine_mask); +} + +/** + * intel_vgpu_setup_submission - setup submission-related resource for vGPU + * @vgpu: a vGPU + * + * This function is called when a vGPU is being created. + * + * Returns: + * Zero on success, negative error code if failed. + * + */ +int intel_vgpu_setup_submission(struct intel_vgpu *vgpu) +{ + struct intel_vgpu_submission *s = &vgpu->submission; + enum intel_engine_id i; + struct intel_engine_cs *engine; + int ret; + + s->shadow_ctx = i915_gem_context_create_gvt( &vgpu->gvt->dev_priv->drm); - if (IS_ERR(vgpu->shadow_ctx)) - return PTR_ERR(vgpu->shadow_ctx); + if (IS_ERR(s->shadow_ctx)) + return PTR_ERR(s->shadow_ctx); + + if (HAS_LOGICAL_RING_PREEMPTION(vgpu->gvt->dev_priv)) + s->shadow_ctx->priority = INT_MAX; + + bitmap_zero(s->shadow_ctx_desc_updated, I915_NUM_ENGINES); - if (INTEL_INFO(vgpu->gvt->dev_priv)->has_logical_ring_preemption) - vgpu->shadow_ctx->priority = INT_MAX; + s->workloads = kmem_cache_create("gvt-g_vgpu_workload", + sizeof(struct intel_vgpu_workload), 0, + SLAB_HWCACHE_ALIGN, + NULL); - vgpu->shadow_ctx->engine[RCS].initialised = true; + if (!s->workloads) { + ret = -ENOMEM; + goto out_shadow_ctx; + } + + for_each_engine(engine, vgpu->gvt->dev_priv, i) + INIT_LIST_HEAD(&s->workload_q_head[i]); - bitmap_zero(vgpu->shadow_ctx_desc_updated, I915_NUM_ENGINES); + atomic_set(&s->running_workload_num, 0); + bitmap_zero(s->tlb_handle_pending, I915_NUM_ENGINES); return 0; + +out_shadow_ctx: + i915_gem_context_put(s->shadow_ctx); + return ret; +} + +/** + * intel_vgpu_select_submission_ops - select virtual submission interface + * @vgpu: a vGPU + * @interface: expected vGPU virtual submission interface + * + * This function is called when guest configures submission interface. + * + * Returns: + * Zero on success, negative error code if failed. + * + */ +int intel_vgpu_select_submission_ops(struct intel_vgpu *vgpu, + unsigned int interface) +{ + struct intel_vgpu_submission *s = &vgpu->submission; + const struct intel_vgpu_submission_ops *ops[] = { + [INTEL_VGPU_EXECLIST_SUBMISSION] = + &intel_vgpu_execlist_submission_ops, + }; + int ret; + + if (WARN_ON(interface >= ARRAY_SIZE(ops))) + return -EINVAL; + + if (s->active) { + s->ops->clean(vgpu); + s->active = false; + gvt_dbg_core("vgpu%d: de-select ops [ %s ] \n", + vgpu->id, s->ops->name); + } + + if (interface == 0) { + s->ops = NULL; + s->virtual_submission_interface = 0; + gvt_dbg_core("vgpu%d: no submission ops\n", vgpu->id); + return 0; + } + + ret = ops[interface]->init(vgpu); + if (ret) + return ret; + + s->ops = ops[interface]; + s->virtual_submission_interface = interface; + s->active = true; + + gvt_dbg_core("vgpu%d: activate ops [ %s ]\n", + vgpu->id, s->ops->name); + + return 0; +} + +/** + * intel_vgpu_destroy_workload - destroy a vGPU workload + * @vgpu: a vGPU + * + * This function is called when destroy a vGPU workload. + * + */ +void intel_vgpu_destroy_workload(struct intel_vgpu_workload *workload) +{ + struct intel_vgpu_submission *s = &workload->vgpu->submission; + + if (workload->shadow_mm) + intel_gvt_mm_unreference(workload->shadow_mm); + + kmem_cache_free(s->workloads, workload); +} + +static struct intel_vgpu_workload * +alloc_workload(struct intel_vgpu *vgpu) +{ + struct intel_vgpu_submission *s = &vgpu->submission; + struct intel_vgpu_workload *workload; + + workload = kmem_cache_zalloc(s->workloads, GFP_KERNEL); + if (!workload) + return ERR_PTR(-ENOMEM); + + INIT_LIST_HEAD(&workload->list); + INIT_LIST_HEAD(&workload->shadow_bb); + + init_waitqueue_head(&workload->shadow_ctx_status_wq); + atomic_set(&workload->shadow_ctx_active, 0); + + workload->status = -EINPROGRESS; + workload->shadowed = false; + workload->vgpu = vgpu; + + return workload; +} + +#define RING_CTX_OFF(x) \ + offsetof(struct execlist_ring_context, x) + +static void read_guest_pdps(struct intel_vgpu *vgpu, + u64 ring_context_gpa, u32 pdp[8]) +{ + u64 gpa; + int i; + + gpa = ring_context_gpa + RING_CTX_OFF(pdp3_UDW.val); + + for (i = 0; i < 8; i++) + intel_gvt_hypervisor_read_gpa(vgpu, + gpa + i * 8, &pdp[7 - i], 4); +} + +static int prepare_mm(struct intel_vgpu_workload *workload) +{ + struct execlist_ctx_descriptor_format *desc = &workload->ctx_desc; + struct intel_vgpu_mm *mm; + struct intel_vgpu *vgpu = workload->vgpu; + int page_table_level; + u32 pdp[8]; + + if (desc->addressing_mode == 1) { /* legacy 32-bit */ + page_table_level = 3; + } else if (desc->addressing_mode == 3) { /* legacy 64 bit */ + page_table_level = 4; + } else { + gvt_vgpu_err("Advanced Context mode(SVM) is not supported!\n"); + return -EINVAL; + } + + read_guest_pdps(workload->vgpu, workload->ring_context_gpa, pdp); + + mm = intel_vgpu_find_ppgtt_mm(workload->vgpu, page_table_level, pdp); + if (mm) { + intel_gvt_mm_reference(mm); + } else { + + mm = intel_vgpu_create_mm(workload->vgpu, INTEL_GVT_MM_PPGTT, + pdp, page_table_level, 0); + if (IS_ERR(mm)) { + gvt_vgpu_err("fail to create mm object.\n"); + return PTR_ERR(mm); + } + } + workload->shadow_mm = mm; + return 0; +} + +#define same_context(a, b) (((a)->context_id == (b)->context_id) && \ + ((a)->lrca == (b)->lrca)) + +#define get_last_workload(q) \ + (list_empty(q) ? NULL : container_of(q->prev, \ + struct intel_vgpu_workload, list)) +/** + * intel_vgpu_create_workload - create a vGPU workload + * @vgpu: a vGPU + * @desc: a guest context descriptor + * + * This function is called when creating a vGPU workload. + * + * Returns: + * struct intel_vgpu_workload * on success, negative error code in + * pointer if failed. + * + */ +struct intel_vgpu_workload * +intel_vgpu_create_workload(struct intel_vgpu *vgpu, int ring_id, + struct execlist_ctx_descriptor_format *desc) +{ + struct intel_vgpu_submission *s = &vgpu->submission; + struct list_head *q = workload_q_head(vgpu, ring_id); + struct intel_vgpu_workload *last_workload = get_last_workload(q); + struct intel_vgpu_workload *workload = NULL; + struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv; + u64 ring_context_gpa; + u32 head, tail, start, ctl, ctx_ctl, per_ctx, indirect_ctx; + int ret; + + ring_context_gpa = intel_vgpu_gma_to_gpa(vgpu->gtt.ggtt_mm, + (u32)((desc->lrca + 1) << I915_GTT_PAGE_SHIFT)); + if (ring_context_gpa == INTEL_GVT_INVALID_ADDR) { + gvt_vgpu_err("invalid guest context LRCA: %x\n", desc->lrca); + return ERR_PTR(-EINVAL); + } + + intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa + + RING_CTX_OFF(ring_header.val), &head, 4); + + intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa + + RING_CTX_OFF(ring_tail.val), &tail, 4); + + head &= RB_HEAD_OFF_MASK; + tail &= RB_TAIL_OFF_MASK; + + if (last_workload && same_context(&last_workload->ctx_desc, desc)) { + gvt_dbg_el("ring id %d cur workload == last\n", ring_id); + gvt_dbg_el("ctx head %x real head %lx\n", head, + last_workload->rb_tail); + /* + * cannot use guest context head pointer here, + * as it might not be updated at this time + */ + head = last_workload->rb_tail; + } + + gvt_dbg_el("ring id %d begin a new workload\n", ring_id); + + /* record some ring buffer register values for scan and shadow */ + intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa + + RING_CTX_OFF(rb_start.val), &start, 4); + intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa + + RING_CTX_OFF(rb_ctrl.val), &ctl, 4); + intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa + + RING_CTX_OFF(ctx_ctrl.val), &ctx_ctl, 4); + + workload = alloc_workload(vgpu); + if (IS_ERR(workload)) + return workload; + + workload->ring_id = ring_id; + workload->ctx_desc = *desc; + workload->ring_context_gpa = ring_context_gpa; + workload->rb_head = head; + workload->rb_tail = tail; + workload->rb_start = start; + workload->rb_ctl = ctl; + + if (ring_id == RCS) { + intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa + + RING_CTX_OFF(bb_per_ctx_ptr.val), &per_ctx, 4); + intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa + + RING_CTX_OFF(rcs_indirect_ctx.val), &indirect_ctx, 4); + + workload->wa_ctx.indirect_ctx.guest_gma = + indirect_ctx & INDIRECT_CTX_ADDR_MASK; + workload->wa_ctx.indirect_ctx.size = + (indirect_ctx & INDIRECT_CTX_SIZE_MASK) * + CACHELINE_BYTES; + workload->wa_ctx.per_ctx.guest_gma = + per_ctx & PER_CTX_ADDR_MASK; + workload->wa_ctx.per_ctx.valid = per_ctx & 1; + } + + gvt_dbg_el("workload %p ring id %d head %x tail %x start %x ctl %x\n", + workload, ring_id, head, tail, start, ctl); + + ret = prepare_mm(workload); + if (ret) { + kmem_cache_free(s->workloads, workload); + return ERR_PTR(ret); + } + + /* Only scan and shadow the first workload in the queue + * as there is only one pre-allocated buf-obj for shadow. + */ + if (list_empty(workload_q_head(vgpu, ring_id))) { + intel_runtime_pm_get(dev_priv); + mutex_lock(&dev_priv->drm.struct_mutex); + ret = intel_gvt_scan_and_shadow_workload(workload); + mutex_unlock(&dev_priv->drm.struct_mutex); + intel_runtime_pm_put(dev_priv); + } + + if (ret && (vgpu_is_vm_unhealthy(ret))) { + enter_failsafe_mode(vgpu, GVT_FAILSAFE_GUEST_ERR); + intel_vgpu_destroy_workload(workload); + return ERR_PTR(ret); + } + + return workload; +} + +/** + * intel_vgpu_queue_workload - Qeue a vGPU workload + * @workload: the workload to queue in + */ +void intel_vgpu_queue_workload(struct intel_vgpu_workload *workload) +{ + list_add_tail(&workload->list, + workload_q_head(workload->vgpu, workload->ring_id)); + intel_gvt_kick_schedule(workload->vgpu->gvt); + wake_up(&workload->vgpu->gvt->scheduler.waitq[workload->ring_id]); } |