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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*/
#include "msm_ringbuffer.h"
#include "msm_gpu.h"
static uint num_hw_submissions = 8;
MODULE_PARM_DESC(num_hw_submissions, "The max # of jobs to write into ringbuffer (default 8)");
module_param(num_hw_submissions, uint, 0600);
static struct dma_fence *msm_job_run(struct drm_sched_job *job)
{
struct msm_gem_submit *submit = to_msm_submit(job);
struct msm_fence_context *fctx = submit->ring->fctx;
struct msm_gpu *gpu = submit->gpu;
struct msm_drm_private *priv = gpu->dev->dev_private;
int i;
msm_fence_init(submit->hw_fence, fctx);
mutex_lock(&priv->lru.lock);
for (i = 0; i < submit->nr_bos; i++) {
struct drm_gem_object *obj = submit->bos[i].obj;
msm_gem_unpin_active(obj);
submit->bos[i].flags &= ~BO_PINNED;
}
mutex_unlock(&priv->lru.lock);
/* TODO move submit path over to using a per-ring lock.. */
mutex_lock(&gpu->lock);
msm_gpu_submit(gpu, submit);
mutex_unlock(&gpu->lock);
return dma_fence_get(submit->hw_fence);
}
static void msm_job_free(struct drm_sched_job *job)
{
struct msm_gem_submit *submit = to_msm_submit(job);
drm_sched_job_cleanup(job);
msm_gem_submit_put(submit);
}
static const struct drm_sched_backend_ops msm_sched_ops = {
.run_job = msm_job_run,
.free_job = msm_job_free
};
struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
void *memptrs, uint64_t memptrs_iova)
{
struct msm_ringbuffer *ring;
long sched_timeout;
char name[32];
int ret;
/* We assume everwhere that MSM_GPU_RINGBUFFER_SZ is a power of 2 */
BUILD_BUG_ON(!is_power_of_2(MSM_GPU_RINGBUFFER_SZ));
ring = kzalloc(sizeof(*ring), GFP_KERNEL);
if (!ring) {
ret = -ENOMEM;
goto fail;
}
ring->gpu = gpu;
ring->id = id;
ring->start = msm_gem_kernel_new(gpu->dev, MSM_GPU_RINGBUFFER_SZ,
check_apriv(gpu, MSM_BO_WC | MSM_BO_GPU_READONLY),
gpu->aspace, &ring->bo, &ring->iova);
if (IS_ERR(ring->start)) {
ret = PTR_ERR(ring->start);
ring->start = NULL;
goto fail;
}
msm_gem_object_set_name(ring->bo, "ring%d", id);
ring->end = ring->start + (MSM_GPU_RINGBUFFER_SZ >> 2);
ring->next = ring->start;
ring->cur = ring->start;
ring->memptrs = memptrs;
ring->memptrs_iova = memptrs_iova;
/* currently managing hangcheck ourselves: */
sched_timeout = MAX_SCHEDULE_TIMEOUT;
ret = drm_sched_init(&ring->sched, &msm_sched_ops,
DRM_SCHED_PRIORITY_COUNT,
num_hw_submissions, 0, sched_timeout,
NULL, NULL, to_msm_bo(ring->bo)->name, gpu->dev->dev);
if (ret) {
goto fail;
}
INIT_LIST_HEAD(&ring->submits);
spin_lock_init(&ring->submit_lock);
spin_lock_init(&ring->preempt_lock);
snprintf(name, sizeof(name), "gpu-ring-%d", ring->id);
ring->fctx = msm_fence_context_alloc(gpu->dev, &ring->memptrs->fence, name);
return ring;
fail:
msm_ringbuffer_destroy(ring);
return ERR_PTR(ret);
}
void msm_ringbuffer_destroy(struct msm_ringbuffer *ring)
{
if (IS_ERR_OR_NULL(ring))
return;
drm_sched_fini(&ring->sched);
msm_fence_context_free(ring->fctx);
msm_gem_kernel_put(ring->bo, ring->gpu->aspace);
kfree(ring);
}
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