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