diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/sched_policy.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/sched_policy.c | 73 |
1 files changed, 62 insertions, 11 deletions
diff --git a/drivers/gpu/drm/i915/gvt/sched_policy.c b/drivers/gpu/drm/i915/gvt/sched_policy.c index d053cbe1dc94..c32e7d5e8629 100644 --- a/drivers/gpu/drm/i915/gvt/sched_policy.c +++ b/drivers/gpu/drm/i915/gvt/sched_policy.c @@ -47,11 +47,15 @@ static bool vgpu_has_pending_workload(struct intel_vgpu *vgpu) return false; } +/* We give 2 seconds higher prio for vGPU during start */ +#define GVT_SCHED_VGPU_PRI_TIME 2 + struct vgpu_sched_data { struct list_head lru_list; struct intel_vgpu *vgpu; bool active; - + bool pri_sched; + ktime_t pri_time; ktime_t sched_in_time; ktime_t sched_time; ktime_t left_ts; @@ -183,6 +187,14 @@ static struct intel_vgpu *find_busy_vgpu(struct gvt_sched_data *sched_data) if (!vgpu_has_pending_workload(vgpu_data->vgpu)) continue; + if (vgpu_data->pri_sched) { + if (ktime_before(ktime_get(), vgpu_data->pri_time)) { + vgpu = vgpu_data->vgpu; + break; + } else + vgpu_data->pri_sched = false; + } + /* Return the vGPU only if it has time slice left */ if (vgpu_data->left_ts > 0) { vgpu = vgpu_data->vgpu; @@ -202,6 +214,7 @@ static void tbs_sched_func(struct gvt_sched_data *sched_data) struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler; struct vgpu_sched_data *vgpu_data; struct intel_vgpu *vgpu = NULL; + /* no active vgpu or has already had a target */ if (list_empty(&sched_data->lru_runq_head) || scheduler->next_vgpu) goto out; @@ -209,12 +222,13 @@ static void tbs_sched_func(struct gvt_sched_data *sched_data) vgpu = find_busy_vgpu(sched_data); if (vgpu) { scheduler->next_vgpu = vgpu; - - /* Move the last used vGPU to the tail of lru_list */ vgpu_data = vgpu->sched_data; - list_del_init(&vgpu_data->lru_list); - list_add_tail(&vgpu_data->lru_list, - &sched_data->lru_runq_head); + if (!vgpu_data->pri_sched) { + /* Move the last used vGPU to the tail of lru_list */ + list_del_init(&vgpu_data->lru_list); + list_add_tail(&vgpu_data->lru_list, + &sched_data->lru_runq_head); + } } else { scheduler->next_vgpu = gvt->idle_vgpu; } @@ -228,7 +242,7 @@ void intel_gvt_schedule(struct intel_gvt *gvt) struct gvt_sched_data *sched_data = gvt->scheduler.sched_data; ktime_t cur_time; - mutex_lock(&gvt->lock); + mutex_lock(&gvt->sched_lock); cur_time = ktime_get(); if (test_and_clear_bit(INTEL_GVT_REQUEST_SCHED, @@ -244,7 +258,7 @@ void intel_gvt_schedule(struct intel_gvt *gvt) vgpu_update_timeslice(gvt->scheduler.current_vgpu, cur_time); tbs_sched_func(sched_data); - mutex_unlock(&gvt->lock); + mutex_unlock(&gvt->sched_lock); } static enum hrtimer_restart tbs_timer_fn(struct hrtimer *timer_data) @@ -328,11 +342,17 @@ static void tbs_sched_start_schedule(struct intel_vgpu *vgpu) { struct gvt_sched_data *sched_data = vgpu->gvt->scheduler.sched_data; struct vgpu_sched_data *vgpu_data = vgpu->sched_data; + ktime_t now; if (!list_empty(&vgpu_data->lru_list)) return; - list_add_tail(&vgpu_data->lru_list, &sched_data->lru_runq_head); + now = ktime_get(); + vgpu_data->pri_time = ktime_add(now, + ktime_set(GVT_SCHED_VGPU_PRI_TIME, 0)); + vgpu_data->pri_sched = true; + + list_add(&vgpu_data->lru_list, &sched_data->lru_runq_head); if (!hrtimer_active(&sched_data->timer)) hrtimer_start(&sched_data->timer, ktime_add_ns(ktime_get(), @@ -359,39 +379,65 @@ static struct intel_gvt_sched_policy_ops tbs_schedule_ops = { int intel_gvt_init_sched_policy(struct intel_gvt *gvt) { + int ret; + + mutex_lock(&gvt->sched_lock); gvt->scheduler.sched_ops = &tbs_schedule_ops; + ret = gvt->scheduler.sched_ops->init(gvt); + mutex_unlock(&gvt->sched_lock); - return gvt->scheduler.sched_ops->init(gvt); + return ret; } void intel_gvt_clean_sched_policy(struct intel_gvt *gvt) { + mutex_lock(&gvt->sched_lock); gvt->scheduler.sched_ops->clean(gvt); + mutex_unlock(&gvt->sched_lock); } +/* for per-vgpu scheduler policy, there are 2 per-vgpu data: + * sched_data, and sched_ctl. We see these 2 data as part of + * the global scheduler which are proteced by gvt->sched_lock. + * Caller should make their decision if the vgpu_lock should + * be hold outside. + */ + int intel_vgpu_init_sched_policy(struct intel_vgpu *vgpu) { - return vgpu->gvt->scheduler.sched_ops->init_vgpu(vgpu); + int ret; + + mutex_lock(&vgpu->gvt->sched_lock); + ret = vgpu->gvt->scheduler.sched_ops->init_vgpu(vgpu); + mutex_unlock(&vgpu->gvt->sched_lock); + + return ret; } void intel_vgpu_clean_sched_policy(struct intel_vgpu *vgpu) { + mutex_lock(&vgpu->gvt->sched_lock); vgpu->gvt->scheduler.sched_ops->clean_vgpu(vgpu); + mutex_unlock(&vgpu->gvt->sched_lock); } void intel_vgpu_start_schedule(struct intel_vgpu *vgpu) { struct vgpu_sched_data *vgpu_data = vgpu->sched_data; + mutex_lock(&vgpu->gvt->sched_lock); if (!vgpu_data->active) { gvt_dbg_core("vgpu%d: start schedule\n", vgpu->id); vgpu->gvt->scheduler.sched_ops->start_schedule(vgpu); } + mutex_unlock(&vgpu->gvt->sched_lock); } void intel_gvt_kick_schedule(struct intel_gvt *gvt) { + mutex_lock(&gvt->sched_lock); intel_gvt_request_service(gvt, INTEL_GVT_REQUEST_EVENT_SCHED); + mutex_unlock(&gvt->sched_lock); } void intel_vgpu_stop_schedule(struct intel_vgpu *vgpu) @@ -400,12 +446,14 @@ void intel_vgpu_stop_schedule(struct intel_vgpu *vgpu) &vgpu->gvt->scheduler; int ring_id; struct vgpu_sched_data *vgpu_data = vgpu->sched_data; + struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv; if (!vgpu_data->active) return; gvt_dbg_core("vgpu%d: stop schedule\n", vgpu->id); + mutex_lock(&vgpu->gvt->sched_lock); scheduler->sched_ops->stop_schedule(vgpu); if (scheduler->next_vgpu == vgpu) @@ -417,6 +465,7 @@ void intel_vgpu_stop_schedule(struct intel_vgpu *vgpu) scheduler->current_vgpu = NULL; } + intel_runtime_pm_get(dev_priv); spin_lock_bh(&scheduler->mmio_context_lock); for (ring_id = 0; ring_id < I915_NUM_ENGINES; ring_id++) { if (scheduler->engine_owner[ring_id] == vgpu) { @@ -425,4 +474,6 @@ void intel_vgpu_stop_schedule(struct intel_vgpu *vgpu) } } spin_unlock_bh(&scheduler->mmio_context_lock); + intel_runtime_pm_put(dev_priv); + mutex_unlock(&vgpu->gvt->sched_lock); } |
