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