155 lines
3.1 KiB
C
155 lines
3.1 KiB
C
/* Copyright (c) 2017 The Linux Foundation. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 and
|
|
* only version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kref.h>
|
|
#include "msm_gpu.h"
|
|
|
|
void msm_submitqueue_destroy(struct kref *kref)
|
|
{
|
|
struct msm_gpu_submitqueue *queue = container_of(kref,
|
|
struct msm_gpu_submitqueue, ref);
|
|
|
|
kfree(queue);
|
|
}
|
|
|
|
struct msm_gpu_submitqueue *msm_submitqueue_get(struct msm_file_private *ctx,
|
|
u32 id)
|
|
{
|
|
struct msm_gpu_submitqueue *entry;
|
|
|
|
if (!ctx)
|
|
return NULL;
|
|
|
|
read_lock(&ctx->queuelock);
|
|
|
|
list_for_each_entry(entry, &ctx->submitqueues, node) {
|
|
if (entry->id == id) {
|
|
kref_get(&entry->ref);
|
|
read_unlock(&ctx->queuelock);
|
|
|
|
return entry;
|
|
}
|
|
}
|
|
|
|
read_unlock(&ctx->queuelock);
|
|
return NULL;
|
|
}
|
|
|
|
void msm_submitqueue_close(struct msm_file_private *ctx)
|
|
{
|
|
struct msm_gpu_submitqueue *entry, *tmp;
|
|
|
|
if (!ctx)
|
|
return;
|
|
|
|
/*
|
|
* No lock needed in close and there won't
|
|
* be any more user ioctls coming our way
|
|
*/
|
|
list_for_each_entry_safe(entry, tmp, &ctx->submitqueues, node)
|
|
msm_submitqueue_put(entry);
|
|
}
|
|
|
|
int msm_submitqueue_create(struct drm_device *drm, struct msm_file_private *ctx,
|
|
u32 prio, u32 flags, u32 *id)
|
|
{
|
|
struct msm_drm_private *priv = drm->dev_private;
|
|
struct msm_gpu_submitqueue *queue;
|
|
|
|
if (!ctx)
|
|
return -ENODEV;
|
|
|
|
queue = kzalloc(sizeof(*queue), GFP_KERNEL);
|
|
|
|
if (!queue)
|
|
return -ENOMEM;
|
|
|
|
kref_init(&queue->ref);
|
|
queue->flags = flags;
|
|
|
|
if (priv->gpu) {
|
|
if (prio >= priv->gpu->nr_rings) {
|
|
kfree(queue);
|
|
return -EINVAL;
|
|
}
|
|
|
|
queue->prio = prio;
|
|
}
|
|
|
|
write_lock(&ctx->queuelock);
|
|
|
|
queue->id = ctx->queueid++;
|
|
|
|
if (id)
|
|
*id = queue->id;
|
|
|
|
list_add_tail(&queue->node, &ctx->submitqueues);
|
|
|
|
write_unlock(&ctx->queuelock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int msm_submitqueue_init(struct drm_device *drm, struct msm_file_private *ctx)
|
|
{
|
|
struct msm_drm_private *priv = drm->dev_private;
|
|
int default_prio;
|
|
|
|
if (!ctx)
|
|
return 0;
|
|
|
|
/*
|
|
* Select priority 2 as the "default priority" unless nr_rings is less
|
|
* than 2 and then pick the lowest pirority
|
|
*/
|
|
default_prio = priv->gpu ?
|
|
clamp_t(uint32_t, 2, 0, priv->gpu->nr_rings - 1) : 0;
|
|
|
|
INIT_LIST_HEAD(&ctx->submitqueues);
|
|
|
|
rwlock_init(&ctx->queuelock);
|
|
|
|
return msm_submitqueue_create(drm, ctx, default_prio, 0, NULL);
|
|
}
|
|
|
|
int msm_submitqueue_remove(struct msm_file_private *ctx, u32 id)
|
|
{
|
|
struct msm_gpu_submitqueue *entry;
|
|
|
|
if (!ctx)
|
|
return 0;
|
|
|
|
/*
|
|
* id 0 is the "default" queue and can't be destroyed
|
|
* by the user
|
|
*/
|
|
if (!id)
|
|
return -ENOENT;
|
|
|
|
write_lock(&ctx->queuelock);
|
|
|
|
list_for_each_entry(entry, &ctx->submitqueues, node) {
|
|
if (entry->id == id) {
|
|
list_del(&entry->node);
|
|
write_unlock(&ctx->queuelock);
|
|
|
|
msm_submitqueue_put(entry);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
write_unlock(&ctx->queuelock);
|
|
return -ENOENT;
|
|
}
|
|
|