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amdgpu_sched.c revision 1.2 
      1 /*	$NetBSD: amdgpu_sched.c,v 1.2 2018/08/27 04:58:19 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2015 Advanced Micro Devices, Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  *
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: amdgpu_sched.c,v 1.2 2018/08/27 04:58:19 riastradh Exp $");
     28 
     29 #include <linux/kthread.h>
     30 #include <linux/wait.h>
     31 #include <linux/sched.h>
     32 #include <drm/drmP.h>
     33 #include "amdgpu.h"
     34 #include "amdgpu_trace.h"
     35 
     36 static struct fence *amdgpu_sched_dependency(struct amd_sched_job *sched_job)
     37 {
     38 	struct amdgpu_job *job = to_amdgpu_job(sched_job);
     39 	return amdgpu_sync_get_fence(&job->ibs->sync);
     40 }
     41 
     42 static struct fence *amdgpu_sched_run_job(struct amd_sched_job *sched_job)
     43 {
     44 	struct amdgpu_fence *fence = NULL;
     45 	struct amdgpu_job *job;
     46 	int r;
     47 
     48 	if (!sched_job) {
     49 		DRM_ERROR("job is null\n");
     50 		return NULL;
     51 	}
     52 	job = to_amdgpu_job(sched_job);
     53 	trace_amdgpu_sched_run_job(job);
     54 	r = amdgpu_ib_schedule(job->adev, job->num_ibs, job->ibs, job->owner);
     55 	if (r) {
     56 		DRM_ERROR("Error scheduling IBs (%d)\n", r);
     57 		goto err;
     58 	}
     59 
     60 	fence = job->ibs[job->num_ibs - 1].fence;
     61 	fence_get(&fence->base);
     62 
     63 err:
     64 	if (job->free_job)
     65 		job->free_job(job);
     66 
     67 	kfree(job);
     68 	return fence ? &fence->base : NULL;
     69 }
     70 
     71 struct amd_sched_backend_ops amdgpu_sched_ops = {
     72 	.dependency = amdgpu_sched_dependency,
     73 	.run_job = amdgpu_sched_run_job,
     74 };
     75 
     76 int amdgpu_sched_ib_submit_kernel_helper(struct amdgpu_device *adev,
     77 					 struct amdgpu_ring *ring,
     78 					 struct amdgpu_ib *ibs,
     79 					 unsigned num_ibs,
     80 					 int (*free_job)(struct amdgpu_job *),
     81 					 void *owner,
     82 					 struct fence **f)
     83 {
     84 	int r = 0;
     85 	if (amdgpu_enable_scheduler) {
     86 		struct amdgpu_job *job =
     87 			kzalloc(sizeof(struct amdgpu_job), GFP_KERNEL);
     88 		if (!job)
     89 			return -ENOMEM;
     90 		job->base.sched = &ring->sched;
     91 		job->base.s_entity = &adev->kernel_ctx.rings[ring->idx].entity;
     92 		job->base.s_fence = amd_sched_fence_create(job->base.s_entity, owner);
     93 		if (!job->base.s_fence) {
     94 			kfree(job);
     95 			return -ENOMEM;
     96 		}
     97 		*f = fence_get(&job->base.s_fence->base);
     98 
     99 		job->adev = adev;
    100 		job->ibs = ibs;
    101 		job->num_ibs = num_ibs;
    102 		job->owner = owner;
    103 		job->free_job = free_job;
    104 		amd_sched_entity_push_job(&job->base);
    105 	} else {
    106 		r = amdgpu_ib_schedule(adev, num_ibs, ibs, owner);
    107 		if (r)
    108 			return r;
    109 		*f = fence_get(&ibs[num_ibs - 1].fence->base);
    110 	}
    111 
    112 	return 0;
    113 }
    114