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// SPDX-License-Identifier: MIT
/*
* Copyright © 2021 Intel Corporation
*/
#include "xe_sched_job.h"
#include <linux/dma-fence-array.h>
#include <linux/slab.h>
#include "xe_device.h"
#include "xe_engine.h"
#include "xe_gt.h"
#include "xe_hw_engine_types.h"
#include "xe_hw_fence.h"
#include "xe_lrc.h"
#include "xe_macros.h"
#include "xe_trace.h"
#include "xe_vm.h"
static struct kmem_cache *xe_sched_job_slab;
static struct kmem_cache *xe_sched_job_parallel_slab;
int __init xe_sched_job_module_init(void)
{
xe_sched_job_slab =
kmem_cache_create("xe_sched_job",
sizeof(struct xe_sched_job) +
sizeof(u64), 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!xe_sched_job_slab)
return -ENOMEM;
xe_sched_job_parallel_slab =
kmem_cache_create("xe_sched_job_parallel",
sizeof(struct xe_sched_job) +
sizeof(u64) *
XE_HW_ENGINE_MAX_INSTANCE, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!xe_sched_job_parallel_slab) {
kmem_cache_destroy(xe_sched_job_slab);
return -ENOMEM;
}
return 0;
}
void xe_sched_job_module_exit(void)
{
kmem_cache_destroy(xe_sched_job_slab);
kmem_cache_destroy(xe_sched_job_parallel_slab);
}
static struct xe_sched_job *job_alloc(bool parallel)
{
return kmem_cache_zalloc(parallel ? xe_sched_job_parallel_slab :
xe_sched_job_slab, GFP_KERNEL);
}
bool xe_sched_job_is_migration(struct xe_engine *e)
{
return e->vm && (e->vm->flags & XE_VM_FLAG_MIGRATION) &&
!(e->flags & ENGINE_FLAG_WA);
}
static void job_free(struct xe_sched_job *job)
{
struct xe_engine *e = job->engine;
bool is_migration = xe_sched_job_is_migration(e);
kmem_cache_free(xe_engine_is_parallel(job->engine) || is_migration ?
xe_sched_job_parallel_slab : xe_sched_job_slab, job);
}
static struct xe_device *job_to_xe(struct xe_sched_job *job)
{
return gt_to_xe(job->engine->gt);
}
struct xe_sched_job *xe_sched_job_create(struct xe_engine *e,
u64 *batch_addr)
{
struct xe_sched_job *job;
struct dma_fence **fences;
bool is_migration = xe_sched_job_is_migration(e);
int err;
int i, j;
u32 width;
/* Migration and kernel engines have their own locking */
if (!(e->flags & (ENGINE_FLAG_KERNEL | ENGINE_FLAG_VM |
ENGINE_FLAG_WA))) {
lockdep_assert_held(&e->vm->lock);
if (!xe_vm_no_dma_fences(e->vm))
xe_vm_assert_held(e->vm);
}
job = job_alloc(xe_engine_is_parallel(e) || is_migration);
if (!job)
return ERR_PTR(-ENOMEM);
job->engine = e;
kref_init(&job->refcount);
xe_engine_get(job->engine);
err = drm_sched_job_init(&job->drm, e->entity, 1, NULL);
if (err)
goto err_free;
if (!xe_engine_is_parallel(e)) {
job->fence = xe_lrc_create_seqno_fence(e->lrc);
if (IS_ERR(job->fence)) {
err = PTR_ERR(job->fence);
goto err_sched_job;
}
} else {
struct dma_fence_array *cf;
fences = kmalloc_array(e->width, sizeof(*fences), GFP_KERNEL);
if (!fences) {
err = -ENOMEM;
goto err_sched_job;
}
for (j = 0; j < e->width; ++j) {
fences[j] = xe_lrc_create_seqno_fence(e->lrc + j);
if (IS_ERR(fences[j])) {
err = PTR_ERR(fences[j]);
goto err_fences;
}
}
cf = dma_fence_array_create(e->width, fences,
e->parallel.composite_fence_ctx,
e->parallel.composite_fence_seqno++,
false);
if (!cf) {
--e->parallel.composite_fence_seqno;
err = -ENOMEM;
goto err_fences;
}
/* Sanity check */
for (j = 0; j < e->width; ++j)
XE_BUG_ON(cf->base.seqno != fences[j]->seqno);
job->fence = &cf->base;
}
width = e->width;
if (is_migration)
width = 2;
for (i = 0; i < width; ++i)
job->batch_addr[i] = batch_addr[i];
/* All other jobs require a VM to be open which has a ref */
if (unlikely(e->flags & ENGINE_FLAG_KERNEL))
xe_device_mem_access_get(job_to_xe(job));
xe_device_assert_mem_access(job_to_xe(job));
trace_xe_sched_job_create(job);
return job;
err_fences:
for (j = j - 1; j >= 0; --j) {
--e->lrc[j].fence_ctx.next_seqno;
dma_fence_put(fences[j]);
}
kfree(fences);
err_sched_job:
drm_sched_job_cleanup(&job->drm);
err_free:
xe_engine_put(e);
job_free(job);
return ERR_PTR(err);
}
/**
* xe_sched_job_destroy - Destroy XE schedule job
* @ref: reference to XE schedule job
*
* Called when ref == 0, drop a reference to job's xe_engine + fence, cleanup
* base DRM schedule job, and free memory for XE schedule job.
*/
void xe_sched_job_destroy(struct kref *ref)
{
struct xe_sched_job *job =
container_of(ref, struct xe_sched_job, refcount);
if (unlikely(job->engine->flags & ENGINE_FLAG_KERNEL))
xe_device_mem_access_put(job_to_xe(job));
xe_engine_put(job->engine);
dma_fence_put(job->fence);
drm_sched_job_cleanup(&job->drm);
job_free(job);
}
void xe_sched_job_set_error(struct xe_sched_job *job, int error)
{
if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &job->fence->flags))
return;
dma_fence_set_error(job->fence, error);
if (dma_fence_is_array(job->fence)) {
struct dma_fence_array *array =
to_dma_fence_array(job->fence);
struct dma_fence **child = array->fences;
unsigned int nchild = array->num_fences;
do {
struct dma_fence *current_fence = *child++;
if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT,
¤t_fence->flags))
continue;
dma_fence_set_error(current_fence, error);
} while (--nchild);
}
trace_xe_sched_job_set_error(job);
dma_fence_enable_sw_signaling(job->fence);
xe_hw_fence_irq_run(job->engine->fence_irq);
}
bool xe_sched_job_started(struct xe_sched_job *job)
{
struct xe_lrc *lrc = job->engine->lrc;
return !__dma_fence_is_later(xe_sched_job_seqno(job),
xe_lrc_start_seqno(lrc),
job->fence->ops);
}
bool xe_sched_job_completed(struct xe_sched_job *job)
{
struct xe_lrc *lrc = job->engine->lrc;
/*
* Can safely check just LRC[0] seqno as that is last seqno written when
* parallel handshake is done.
*/
return !__dma_fence_is_later(xe_sched_job_seqno(job), xe_lrc_seqno(lrc),
job->fence->ops);
}
void xe_sched_job_arm(struct xe_sched_job *job)
{
drm_sched_job_arm(&job->drm);
}
void xe_sched_job_push(struct xe_sched_job *job)
{
xe_sched_job_get(job);
trace_xe_sched_job_exec(job);
drm_sched_entity_push_job(&job->drm);
xe_sched_job_put(job);
}
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