void destroy_spu_context(struct kref *kref)
{
struct spu_context *ctx;
ctx = container_of(kref, struct spu_context, kref);
down_write(&ctx->state_sema);
spu_deactivate(ctx);
up_write(&ctx->state_sema);
spu_fini_csa(&ctx->csa);
kfree(ctx);
}
void destroy_spu_context(struct kref *kref)
{
struct spu_context *ctx;
ctx = container_of(kref, struct spu_context, kref);
mutex_lock(&ctx->state_mutex);
spu_deactivate(ctx);
mutex_unlock(&ctx->state_mutex);
spu_fini_csa(&ctx->csa);
if (ctx->gang)
spu_gang_remove_ctx(ctx->gang, ctx);
kfree(ctx);
}
/**
* spu_acquire_saved - lock spu contex and make sure it is in saved state
* @ctx: spu contex to lock
*/
int spu_acquire_saved(struct spu_context *ctx)
{
int ret;
spu_context_nospu_trace(spu_acquire_saved__enter, ctx);
ret = spu_acquire(ctx);
if (ret)
return ret;
if (ctx->state != SPU_STATE_SAVED) {
set_bit(SPU_SCHED_WAS_ACTIVE, &ctx->sched_flags);
spu_deactivate(ctx);
}
return 0;
}
void spu_acquire_saved(struct spu_context *ctx)
{
down_read(&ctx->state_sema);
if (ctx->state == SPU_STATE_SAVED)
return;
up_read(&ctx->state_sema);
down_write(&ctx->state_sema);
if (ctx->state == SPU_STATE_RUNNABLE) {
spu_deactivate(ctx);
ctx->state = SPU_STATE_SAVED;
}
downgrade_write(&ctx->state_sema);
}
void destroy_spu_context(struct kref *kref)
{
struct spu_context *ctx;
ctx = container_of(kref, struct spu_context, kref);
spu_context_nospu_trace(destroy_spu_context__enter, ctx);
mutex_lock(&ctx->state_mutex);
spu_deactivate(ctx);
mutex_unlock(&ctx->state_mutex);
spu_fini_csa(&ctx->csa);
if (ctx->gang)
spu_gang_remove_ctx(ctx->gang, ctx);
if (ctx->prof_priv_kref)
kref_put(ctx->prof_priv_kref, ctx->prof_priv_release);
BUG_ON(!list_empty(&ctx->rq));
atomic_dec(&nr_spu_contexts);
kfree(ctx->switch_log);
kfree(ctx);
}
/* give up the mm reference when the context is about to be destroyed */
void spu_forget(struct spu_context *ctx)
{
struct mm_struct *mm;
/*
* This is basically an open-coded spu_acquire_saved, except that
* we don't acquire the state mutex interruptible, and we don't
* want this context to be rescheduled on release.
*/
mutex_lock(&ctx->state_mutex);
if (ctx->state != SPU_STATE_SAVED)
spu_deactivate(ctx);
mm = ctx->owner;
ctx->owner = NULL;
mmput(mm);
spu_release(ctx);
}
/**
* spu_acquire_saved - lock spu contex and make sure it is in saved state
* @ctx: spu contex to lock
*/
void spu_acquire_saved(struct spu_context *ctx)
{
spu_acquire(ctx);
if (ctx->state != SPU_STATE_SAVED)
spu_deactivate(ctx);
}
