diff options
Diffstat (limited to 'drivers/gpu/drm/etnaviv/etnaviv_sched.c')
| -rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_sched.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_sched.c b/drivers/gpu/drm/etnaviv/etnaviv_sched.c new file mode 100644 index 000000000..026b6c073 --- /dev/null +++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.c @@ -0,0 +1,200 @@ +// 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); +} |