etnaviv_sched.c 4.6 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Copyright (C) 2017 Etnaviv Project
  4. */
  5. #include <linux/moduleparam.h>
  6. #include "etnaviv_drv.h"
  7. #include "etnaviv_dump.h"
  8. #include "etnaviv_gem.h"
  9. #include "etnaviv_gpu.h"
  10. #include "etnaviv_sched.h"
  11. #include "state.xml.h"
  12. static int etnaviv_job_hang_limit = 0;
  13. module_param_named(job_hang_limit, etnaviv_job_hang_limit, int , 0444);
  14. static int etnaviv_hw_jobs_limit = 4;
  15. module_param_named(hw_job_limit, etnaviv_hw_jobs_limit, int , 0444);
  16. static struct dma_fence *
  17. etnaviv_sched_dependency(struct drm_sched_job *sched_job,
  18. struct drm_sched_entity *entity)
  19. {
  20. struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
  21. struct dma_fence *fence;
  22. int i;
  23. if (unlikely(submit->in_fence)) {
  24. fence = submit->in_fence;
  25. submit->in_fence = NULL;
  26. if (!dma_fence_is_signaled(fence))
  27. return fence;
  28. dma_fence_put(fence);
  29. }
  30. for (i = 0; i < submit->nr_bos; i++) {
  31. struct etnaviv_gem_submit_bo *bo = &submit->bos[i];
  32. int j;
  33. if (bo->excl) {
  34. fence = bo->excl;
  35. bo->excl = NULL;
  36. if (!dma_fence_is_signaled(fence))
  37. return fence;
  38. dma_fence_put(fence);
  39. }
  40. for (j = 0; j < bo->nr_shared; j++) {
  41. if (!bo->shared[j])
  42. continue;
  43. fence = bo->shared[j];
  44. bo->shared[j] = NULL;
  45. if (!dma_fence_is_signaled(fence))
  46. return fence;
  47. dma_fence_put(fence);
  48. }
  49. kfree(bo->shared);
  50. bo->nr_shared = 0;
  51. bo->shared = NULL;
  52. }
  53. return NULL;
  54. }
  55. static struct dma_fence *etnaviv_sched_run_job(struct drm_sched_job *sched_job)
  56. {
  57. struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
  58. struct dma_fence *fence = NULL;
  59. if (likely(!sched_job->s_fence->finished.error))
  60. fence = etnaviv_gpu_submit(submit);
  61. else
  62. dev_dbg(submit->gpu->dev, "skipping bad job\n");
  63. return fence;
  64. }
  65. static void etnaviv_sched_timedout_job(struct drm_sched_job *sched_job)
  66. {
  67. struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
  68. struct etnaviv_gpu *gpu = submit->gpu;
  69. u32 dma_addr;
  70. int change;
  71. /* block scheduler */
  72. drm_sched_stop(&gpu->sched, sched_job);
  73. /*
  74. * If the GPU managed to complete this jobs fence, the timout is
  75. * spurious. Bail out.
  76. */
  77. if (dma_fence_is_signaled(submit->out_fence))
  78. goto out_no_timeout;
  79. /*
  80. * If the GPU is still making forward progress on the front-end (which
  81. * should never loop) we shift out the timeout to give it a chance to
  82. * finish the job.
  83. */
  84. dma_addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
  85. change = dma_addr - gpu->hangcheck_dma_addr;
  86. if (gpu->completed_fence != gpu->hangcheck_fence ||
  87. change < 0 || change > 16) {
  88. gpu->hangcheck_dma_addr = dma_addr;
  89. gpu->hangcheck_fence = gpu->completed_fence;
  90. goto out_no_timeout;
  91. }
  92. if(sched_job)
  93. drm_sched_increase_karma(sched_job);
  94. /* get the GPU back into the init state */
  95. etnaviv_core_dump(submit);
  96. etnaviv_gpu_recover_hang(gpu);
  97. drm_sched_resubmit_jobs(&gpu->sched);
  98. out_no_timeout:
  99. /* restart scheduler after GPU is usable again */
  100. drm_sched_start(&gpu->sched, true);
  101. }
  102. static void etnaviv_sched_free_job(struct drm_sched_job *sched_job)
  103. {
  104. struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
  105. drm_sched_job_cleanup(sched_job);
  106. etnaviv_submit_put(submit);
  107. }
  108. static const struct drm_sched_backend_ops etnaviv_sched_ops = {
  109. .dependency = etnaviv_sched_dependency,
  110. .run_job = etnaviv_sched_run_job,
  111. .timedout_job = etnaviv_sched_timedout_job,
  112. .free_job = etnaviv_sched_free_job,
  113. };
  114. int etnaviv_sched_push_job(struct drm_sched_entity *sched_entity,
  115. struct etnaviv_gem_submit *submit)
  116. {
  117. int ret = 0;
  118. /*
  119. * Hold the fence lock across the whole operation to avoid jobs being
  120. * pushed out of order with regard to their sched fence seqnos as
  121. * allocated in drm_sched_job_init.
  122. */
  123. mutex_lock(&submit->gpu->fence_lock);
  124. ret = drm_sched_job_init(&submit->sched_job, sched_entity,
  125. submit->ctx);
  126. if (ret)
  127. goto out_unlock;
  128. submit->out_fence = dma_fence_get(&submit->sched_job.s_fence->finished);
  129. submit->out_fence_id = idr_alloc_cyclic(&submit->gpu->fence_idr,
  130. submit->out_fence, 0,
  131. INT_MAX, GFP_KERNEL);
  132. if (submit->out_fence_id < 0) {
  133. drm_sched_job_cleanup(&submit->sched_job);
  134. ret = -ENOMEM;
  135. goto out_unlock;
  136. }
  137. /* the scheduler holds on to the job now */
  138. kref_get(&submit->refcount);
  139. drm_sched_entity_push_job(&submit->sched_job, sched_entity);
  140. out_unlock:
  141. mutex_unlock(&submit->gpu->fence_lock);
  142. return ret;
  143. }
  144. int etnaviv_sched_init(struct etnaviv_gpu *gpu)
  145. {
  146. int ret;
  147. ret = drm_sched_init(&gpu->sched, &etnaviv_sched_ops,
  148. etnaviv_hw_jobs_limit, etnaviv_job_hang_limit,
  149. msecs_to_jiffies(500), dev_name(gpu->dev));
  150. if (ret)
  151. return ret;
  152. return 0;
  153. }
  154. void etnaviv_sched_fini(struct etnaviv_gpu *gpu)
  155. {
  156. drm_sched_fini(&gpu->sched);
  157. }