150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2017 Etnaviv Project
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*/
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#include <linux/moduleparam.h>
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#include "etnaviv_drv.h"
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#include "etnaviv_dump.h"
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#include "etnaviv_gem.h"
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#include "etnaviv_gpu.h"
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#include "etnaviv_sched.h"
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#include "state.xml.h"
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static int etnaviv_job_hang_limit = 0;
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module_param_named(job_hang_limit, etnaviv_job_hang_limit, int , 0444);
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static int etnaviv_hw_jobs_limit = 4;
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module_param_named(hw_job_limit, etnaviv_hw_jobs_limit, int , 0444);
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static struct dma_fence *etnaviv_sched_run_job(struct drm_sched_job *sched_job)
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{
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struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
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struct dma_fence *fence = NULL;
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if (likely(!sched_job->s_fence->finished.error))
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fence = etnaviv_gpu_submit(submit);
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else
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dev_dbg(submit->gpu->dev, "skipping bad job\n");
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return fence;
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}
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static enum drm_gpu_sched_stat etnaviv_sched_timedout_job(struct drm_sched_job
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*sched_job)
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{
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struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
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struct etnaviv_gpu *gpu = submit->gpu;
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u32 dma_addr;
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int change;
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/* block scheduler */
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drm_sched_stop(&gpu->sched, sched_job);
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/*
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* If the GPU managed to complete this jobs fence, the timout is
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* spurious. Bail out.
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*/
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if (dma_fence_is_signaled(submit->out_fence))
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goto out_no_timeout;
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/*
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* If the GPU is still making forward progress on the front-end (which
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* should never loop) we shift out the timeout to give it a chance to
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* finish the job.
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*/
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dma_addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
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change = dma_addr - gpu->hangcheck_dma_addr;
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if (gpu->completed_fence != gpu->hangcheck_fence ||
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change < 0 || change > 16) {
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gpu->hangcheck_dma_addr = dma_addr;
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gpu->hangcheck_fence = gpu->completed_fence;
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goto out_no_timeout;
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}
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if(sched_job)
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drm_sched_increase_karma(sched_job);
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/* get the GPU back into the init state */
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etnaviv_core_dump(submit);
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etnaviv_gpu_recover_hang(submit);
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drm_sched_resubmit_jobs(&gpu->sched);
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drm_sched_start(&gpu->sched, true);
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return DRM_GPU_SCHED_STAT_NOMINAL;
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out_no_timeout:
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/* restart scheduler after GPU is usable again */
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drm_sched_start(&gpu->sched, true);
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return DRM_GPU_SCHED_STAT_NOMINAL;
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}
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static void etnaviv_sched_free_job(struct drm_sched_job *sched_job)
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{
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struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
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drm_sched_job_cleanup(sched_job);
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etnaviv_submit_put(submit);
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}
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static const struct drm_sched_backend_ops etnaviv_sched_ops = {
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.run_job = etnaviv_sched_run_job,
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.timedout_job = etnaviv_sched_timedout_job,
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.free_job = etnaviv_sched_free_job,
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};
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int etnaviv_sched_push_job(struct etnaviv_gem_submit *submit)
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{
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int ret = 0;
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/*
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* Hold the fence lock across the whole operation to avoid jobs being
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* pushed out of order with regard to their sched fence seqnos as
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* allocated in drm_sched_job_arm.
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*/
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mutex_lock(&submit->gpu->fence_lock);
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drm_sched_job_arm(&submit->sched_job);
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submit->out_fence = dma_fence_get(&submit->sched_job.s_fence->finished);
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submit->out_fence_id = idr_alloc_cyclic(&submit->gpu->fence_idr,
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submit->out_fence, 0,
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INT_MAX, GFP_KERNEL);
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if (submit->out_fence_id < 0) {
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drm_sched_job_cleanup(&submit->sched_job);
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ret = -ENOMEM;
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goto out_unlock;
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}
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/* the scheduler holds on to the job now */
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kref_get(&submit->refcount);
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drm_sched_entity_push_job(&submit->sched_job);
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out_unlock:
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mutex_unlock(&submit->gpu->fence_lock);
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return ret;
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}
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int etnaviv_sched_init(struct etnaviv_gpu *gpu)
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{
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int ret;
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ret = drm_sched_init(&gpu->sched, &etnaviv_sched_ops,
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etnaviv_hw_jobs_limit, etnaviv_job_hang_limit,
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msecs_to_jiffies(500), NULL, NULL,
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dev_name(gpu->dev), gpu->dev);
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if (ret)
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return ret;
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return 0;
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}
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void etnaviv_sched_fini(struct etnaviv_gpu *gpu)
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{
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drm_sched_fini(&gpu->sched);
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}
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