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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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999ccb4017
Mark all local functions & variables as static. Signed-off-by: Du, Changbin <changbin.du@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
295 lines
7.4 KiB
C
295 lines
7.4 KiB
C
/*
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* Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Anhua Xu
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* Kevin Tian <kevin.tian@intel.com>
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*
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* Contributors:
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* Min He <min.he@intel.com>
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* Bing Niu <bing.niu@intel.com>
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* Zhi Wang <zhi.a.wang@intel.com>
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*
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*/
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#include "i915_drv.h"
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#include "gvt.h"
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static bool vgpu_has_pending_workload(struct intel_vgpu *vgpu)
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{
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struct intel_vgpu_execlist *execlist;
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enum intel_engine_id i;
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struct intel_engine_cs *engine;
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for_each_engine(engine, vgpu->gvt->dev_priv, i) {
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execlist = &vgpu->execlist[i];
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if (!list_empty(workload_q_head(vgpu, i)))
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return true;
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}
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return false;
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}
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static void try_to_schedule_next_vgpu(struct intel_gvt *gvt)
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{
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struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler;
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enum intel_engine_id i;
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struct intel_engine_cs *engine;
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/* no target to schedule */
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if (!scheduler->next_vgpu)
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return;
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gvt_dbg_sched("try to schedule next vgpu %d\n",
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scheduler->next_vgpu->id);
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/*
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* after the flag is set, workload dispatch thread will
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* stop dispatching workload for current vgpu
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*/
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scheduler->need_reschedule = true;
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/* still have uncompleted workload? */
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for_each_engine(engine, gvt->dev_priv, i) {
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if (scheduler->current_workload[i]) {
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gvt_dbg_sched("still have running workload\n");
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return;
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}
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}
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gvt_dbg_sched("switch to next vgpu %d\n",
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scheduler->next_vgpu->id);
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/* switch current vgpu */
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scheduler->current_vgpu = scheduler->next_vgpu;
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scheduler->next_vgpu = NULL;
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scheduler->need_reschedule = false;
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/* wake up workload dispatch thread */
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for_each_engine(engine, gvt->dev_priv, i)
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wake_up(&scheduler->waitq[i]);
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}
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struct tbs_vgpu_data {
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struct list_head list;
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struct intel_vgpu *vgpu;
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/* put some per-vgpu sched stats here */
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};
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struct tbs_sched_data {
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struct intel_gvt *gvt;
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struct delayed_work work;
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unsigned long period;
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struct list_head runq_head;
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};
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#define GVT_DEFAULT_TIME_SLICE (1 * HZ / 1000)
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static void tbs_sched_func(struct work_struct *work)
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{
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struct tbs_sched_data *sched_data = container_of(work,
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struct tbs_sched_data, work.work);
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struct tbs_vgpu_data *vgpu_data;
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struct intel_gvt *gvt = sched_data->gvt;
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struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler;
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struct intel_vgpu *vgpu = NULL;
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struct list_head *pos, *head;
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mutex_lock(&gvt->lock);
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/* no vgpu or has already had a target */
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if (list_empty(&sched_data->runq_head) || scheduler->next_vgpu)
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goto out;
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if (scheduler->current_vgpu) {
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vgpu_data = scheduler->current_vgpu->sched_data;
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head = &vgpu_data->list;
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} else {
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gvt_dbg_sched("no current vgpu search from q head\n");
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head = &sched_data->runq_head;
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}
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/* search a vgpu with pending workload */
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list_for_each(pos, head) {
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if (pos == &sched_data->runq_head)
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continue;
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vgpu_data = container_of(pos, struct tbs_vgpu_data, list);
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if (!vgpu_has_pending_workload(vgpu_data->vgpu))
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continue;
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vgpu = vgpu_data->vgpu;
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break;
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}
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if (vgpu) {
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scheduler->next_vgpu = vgpu;
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gvt_dbg_sched("pick next vgpu %d\n", vgpu->id);
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}
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out:
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if (scheduler->next_vgpu) {
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gvt_dbg_sched("try to schedule next vgpu %d\n",
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scheduler->next_vgpu->id);
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try_to_schedule_next_vgpu(gvt);
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}
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/*
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* still have vgpu on runq
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* or last schedule haven't finished due to running workload
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*/
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if (!list_empty(&sched_data->runq_head) || scheduler->next_vgpu)
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schedule_delayed_work(&sched_data->work, sched_data->period);
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mutex_unlock(&gvt->lock);
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}
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static int tbs_sched_init(struct intel_gvt *gvt)
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{
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struct intel_gvt_workload_scheduler *scheduler =
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&gvt->scheduler;
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struct tbs_sched_data *data;
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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INIT_LIST_HEAD(&data->runq_head);
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INIT_DELAYED_WORK(&data->work, tbs_sched_func);
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data->period = GVT_DEFAULT_TIME_SLICE;
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data->gvt = gvt;
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scheduler->sched_data = data;
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return 0;
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}
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static void tbs_sched_clean(struct intel_gvt *gvt)
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{
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struct intel_gvt_workload_scheduler *scheduler =
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&gvt->scheduler;
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struct tbs_sched_data *data = scheduler->sched_data;
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cancel_delayed_work(&data->work);
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kfree(data);
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scheduler->sched_data = NULL;
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}
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static int tbs_sched_init_vgpu(struct intel_vgpu *vgpu)
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{
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struct tbs_vgpu_data *data;
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->vgpu = vgpu;
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INIT_LIST_HEAD(&data->list);
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vgpu->sched_data = data;
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return 0;
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}
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static void tbs_sched_clean_vgpu(struct intel_vgpu *vgpu)
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{
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kfree(vgpu->sched_data);
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vgpu->sched_data = NULL;
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}
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static void tbs_sched_start_schedule(struct intel_vgpu *vgpu)
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{
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struct tbs_sched_data *sched_data = vgpu->gvt->scheduler.sched_data;
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struct tbs_vgpu_data *vgpu_data = vgpu->sched_data;
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if (!list_empty(&vgpu_data->list))
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return;
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list_add_tail(&vgpu_data->list, &sched_data->runq_head);
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schedule_delayed_work(&sched_data->work, sched_data->period);
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}
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static void tbs_sched_stop_schedule(struct intel_vgpu *vgpu)
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{
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struct tbs_vgpu_data *vgpu_data = vgpu->sched_data;
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list_del_init(&vgpu_data->list);
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}
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static struct intel_gvt_sched_policy_ops tbs_schedule_ops = {
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.init = tbs_sched_init,
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.clean = tbs_sched_clean,
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.init_vgpu = tbs_sched_init_vgpu,
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.clean_vgpu = tbs_sched_clean_vgpu,
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.start_schedule = tbs_sched_start_schedule,
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.stop_schedule = tbs_sched_stop_schedule,
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};
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int intel_gvt_init_sched_policy(struct intel_gvt *gvt)
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{
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gvt->scheduler.sched_ops = &tbs_schedule_ops;
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return gvt->scheduler.sched_ops->init(gvt);
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}
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void intel_gvt_clean_sched_policy(struct intel_gvt *gvt)
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{
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gvt->scheduler.sched_ops->clean(gvt);
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}
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int intel_vgpu_init_sched_policy(struct intel_vgpu *vgpu)
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{
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return vgpu->gvt->scheduler.sched_ops->init_vgpu(vgpu);
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}
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void intel_vgpu_clean_sched_policy(struct intel_vgpu *vgpu)
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{
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vgpu->gvt->scheduler.sched_ops->clean_vgpu(vgpu);
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}
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void intel_vgpu_start_schedule(struct intel_vgpu *vgpu)
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{
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gvt_dbg_core("vgpu%d: start schedule\n", vgpu->id);
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vgpu->gvt->scheduler.sched_ops->start_schedule(vgpu);
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}
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void intel_vgpu_stop_schedule(struct intel_vgpu *vgpu)
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{
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struct intel_gvt_workload_scheduler *scheduler =
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&vgpu->gvt->scheduler;
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gvt_dbg_core("vgpu%d: stop schedule\n", vgpu->id);
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scheduler->sched_ops->stop_schedule(vgpu);
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if (scheduler->next_vgpu == vgpu)
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scheduler->next_vgpu = NULL;
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if (scheduler->current_vgpu == vgpu) {
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/* stop workload dispatching */
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scheduler->need_reschedule = true;
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scheduler->current_vgpu = NULL;
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}
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}
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