dma-buf: Exercise dma-fence-chain under selftests
A few very simple testcases to exercise the dma-fence-chain API. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Venkata Sandeep Dhanalakota <venkata.s.dhanalakota@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200409110101.18400-3-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
Родитель
5de376bb43
Коммит
dc2f7e67a2
|
|
@ -9,6 +9,7 @@ obj-$(CONFIG_UDMABUF) += udmabuf.o
|
|||
|
||||
dmabuf_selftests-y := \
|
||||
selftest.o \
|
||||
st-dma-fence.o
|
||||
st-dma-fence.o \
|
||||
st-dma-fence-chain.o
|
||||
|
||||
obj-$(CONFIG_DMABUF_SELFTESTS) += dmabuf_selftests.o
|
||||
|
|
|
|||
|
|
@ -11,3 +11,4 @@
|
|||
*/
|
||||
selftest(sanitycheck, __sanitycheck__) /* keep first (igt selfcheck) */
|
||||
selftest(dma_fence, dma_fence)
|
||||
selftest(dma_fence_chain, dma_fence_chain)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,715 @@
|
|||
// SPDX-License-Identifier: MIT
|
||||
|
||||
/*
|
||||
* Copyright © 2019 Intel Corporation
|
||||
*/
|
||||
|
||||
#include <linux/delay.h>
|
||||
#include <linux/dma-fence.h>
|
||||
#include <linux/dma-fence-chain.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/kthread.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/sched/signal.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/random.h>
|
||||
|
||||
#include "selftest.h"
|
||||
|
||||
#define CHAIN_SZ (4 << 10)
|
||||
|
||||
static struct kmem_cache *slab_fences;
|
||||
|
||||
static inline struct mock_fence {
|
||||
struct dma_fence base;
|
||||
spinlock_t lock;
|
||||
} *to_mock_fence(struct dma_fence *f) {
|
||||
return container_of(f, struct mock_fence, base);
|
||||
}
|
||||
|
||||
static const char *mock_name(struct dma_fence *f)
|
||||
{
|
||||
return "mock";
|
||||
}
|
||||
|
||||
static void mock_fence_release(struct dma_fence *f)
|
||||
{
|
||||
kmem_cache_free(slab_fences, to_mock_fence(f));
|
||||
}
|
||||
|
||||
static const struct dma_fence_ops mock_ops = {
|
||||
.get_driver_name = mock_name,
|
||||
.get_timeline_name = mock_name,
|
||||
.release = mock_fence_release,
|
||||
};
|
||||
|
||||
static struct dma_fence *mock_fence(void)
|
||||
{
|
||||
struct mock_fence *f;
|
||||
|
||||
f = kmem_cache_alloc(slab_fences, GFP_KERNEL);
|
||||
if (!f)
|
||||
return NULL;
|
||||
|
||||
spin_lock_init(&f->lock);
|
||||
dma_fence_init(&f->base, &mock_ops, &f->lock, 0, 0);
|
||||
|
||||
return &f->base;
|
||||
}
|
||||
|
||||
static inline struct mock_chain {
|
||||
struct dma_fence_chain base;
|
||||
} *to_mock_chain(struct dma_fence *f) {
|
||||
return container_of(f, struct mock_chain, base.base);
|
||||
}
|
||||
|
||||
static struct dma_fence *mock_chain(struct dma_fence *prev,
|
||||
struct dma_fence *fence,
|
||||
u64 seqno)
|
||||
{
|
||||
struct mock_chain *f;
|
||||
|
||||
f = kmalloc(sizeof(*f), GFP_KERNEL);
|
||||
if (!f)
|
||||
return NULL;
|
||||
|
||||
dma_fence_chain_init(&f->base,
|
||||
dma_fence_get(prev),
|
||||
dma_fence_get(fence),
|
||||
seqno);
|
||||
|
||||
return &f->base.base;
|
||||
}
|
||||
|
||||
static int sanitycheck(void *arg)
|
||||
{
|
||||
struct dma_fence *f, *chain;
|
||||
int err = 0;
|
||||
|
||||
f = mock_fence();
|
||||
if (!f)
|
||||
return -ENOMEM;
|
||||
|
||||
chain = mock_chain(NULL, f, 1);
|
||||
if (!chain)
|
||||
err = -ENOMEM;
|
||||
|
||||
dma_fence_signal(f);
|
||||
dma_fence_put(f);
|
||||
|
||||
dma_fence_put(chain);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
struct fence_chains {
|
||||
unsigned int chain_length;
|
||||
struct dma_fence **fences;
|
||||
struct dma_fence **chains;
|
||||
|
||||
struct dma_fence *tail;
|
||||
};
|
||||
|
||||
static uint64_t seqno_inc(unsigned int i)
|
||||
{
|
||||
return i + 1;
|
||||
}
|
||||
|
||||
static int fence_chains_init(struct fence_chains *fc, unsigned int count,
|
||||
uint64_t (*seqno_fn)(unsigned int))
|
||||
{
|
||||
unsigned int i;
|
||||
int err = 0;
|
||||
|
||||
fc->chains = kvmalloc_array(count, sizeof(*fc->chains),
|
||||
GFP_KERNEL | __GFP_ZERO);
|
||||
if (!fc->chains)
|
||||
return -ENOMEM;
|
||||
|
||||
fc->fences = kvmalloc_array(count, sizeof(*fc->fences),
|
||||
GFP_KERNEL | __GFP_ZERO);
|
||||
if (!fc->fences) {
|
||||
err = -ENOMEM;
|
||||
goto err_chains;
|
||||
}
|
||||
|
||||
fc->tail = NULL;
|
||||
for (i = 0; i < count; i++) {
|
||||
fc->fences[i] = mock_fence();
|
||||
if (!fc->fences[i]) {
|
||||
err = -ENOMEM;
|
||||
goto unwind;
|
||||
}
|
||||
|
||||
fc->chains[i] = mock_chain(fc->tail,
|
||||
fc->fences[i],
|
||||
seqno_fn(i));
|
||||
if (!fc->chains[i]) {
|
||||
err = -ENOMEM;
|
||||
goto unwind;
|
||||
}
|
||||
|
||||
fc->tail = fc->chains[i];
|
||||
}
|
||||
|
||||
fc->chain_length = i;
|
||||
return 0;
|
||||
|
||||
unwind:
|
||||
for (i = 0; i < count; i++) {
|
||||
dma_fence_put(fc->fences[i]);
|
||||
dma_fence_put(fc->chains[i]);
|
||||
}
|
||||
kvfree(fc->fences);
|
||||
err_chains:
|
||||
kvfree(fc->chains);
|
||||
return err;
|
||||
}
|
||||
|
||||
static void fence_chains_fini(struct fence_chains *fc)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < fc->chain_length; i++) {
|
||||
dma_fence_signal(fc->fences[i]);
|
||||
dma_fence_put(fc->fences[i]);
|
||||
}
|
||||
kvfree(fc->fences);
|
||||
|
||||
for (i = 0; i < fc->chain_length; i++)
|
||||
dma_fence_put(fc->chains[i]);
|
||||
kvfree(fc->chains);
|
||||
}
|
||||
|
||||
static int find_seqno(void *arg)
|
||||
{
|
||||
struct fence_chains fc;
|
||||
struct dma_fence *fence;
|
||||
int err;
|
||||
int i;
|
||||
|
||||
err = fence_chains_init(&fc, 64, seqno_inc);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
fence = dma_fence_get(fc.tail);
|
||||
err = dma_fence_chain_find_seqno(&fence, 0);
|
||||
dma_fence_put(fence);
|
||||
if (err) {
|
||||
pr_err("Reported %d for find_seqno(0)!\n", err);
|
||||
goto err;
|
||||
}
|
||||
|
||||
for (i = 0; i < fc.chain_length; i++) {
|
||||
fence = dma_fence_get(fc.tail);
|
||||
err = dma_fence_chain_find_seqno(&fence, i + 1);
|
||||
dma_fence_put(fence);
|
||||
if (err) {
|
||||
pr_err("Reported %d for find_seqno(%d:%d)!\n",
|
||||
err, fc.chain_length + 1, i + 1);
|
||||
goto err;
|
||||
}
|
||||
if (fence != fc.chains[i]) {
|
||||
pr_err("Incorrect fence reported by find_seqno(%d:%d)\n",
|
||||
fc.chain_length + 1, i + 1);
|
||||
err = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
dma_fence_get(fence);
|
||||
err = dma_fence_chain_find_seqno(&fence, i + 1);
|
||||
dma_fence_put(fence);
|
||||
if (err) {
|
||||
pr_err("Error reported for finding self\n");
|
||||
goto err;
|
||||
}
|
||||
if (fence != fc.chains[i]) {
|
||||
pr_err("Incorrect fence reported by find self\n");
|
||||
err = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
dma_fence_get(fence);
|
||||
err = dma_fence_chain_find_seqno(&fence, i + 2);
|
||||
dma_fence_put(fence);
|
||||
if (!err) {
|
||||
pr_err("Error not reported for future fence: find_seqno(%d:%d)!\n",
|
||||
i + 1, i + 2);
|
||||
err = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
dma_fence_get(fence);
|
||||
err = dma_fence_chain_find_seqno(&fence, i);
|
||||
dma_fence_put(fence);
|
||||
if (err) {
|
||||
pr_err("Error reported for previous fence!\n");
|
||||
goto err;
|
||||
}
|
||||
if (i > 0 && fence != fc.chains[i - 1]) {
|
||||
pr_err("Incorrect fence reported by find_seqno(%d:%d)\n",
|
||||
i + 1, i);
|
||||
err = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
err:
|
||||
fence_chains_fini(&fc);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int find_signaled(void *arg)
|
||||
{
|
||||
struct fence_chains fc;
|
||||
struct dma_fence *fence;
|
||||
int err;
|
||||
|
||||
err = fence_chains_init(&fc, 2, seqno_inc);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
dma_fence_signal(fc.fences[0]);
|
||||
|
||||
fence = dma_fence_get(fc.tail);
|
||||
err = dma_fence_chain_find_seqno(&fence, 1);
|
||||
dma_fence_put(fence);
|
||||
if (err) {
|
||||
pr_err("Reported %d for find_seqno()!\n", err);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (fence && fence != fc.chains[0]) {
|
||||
pr_err("Incorrect chain-fence.seqno:%lld reported for completed seqno:1\n",
|
||||
fence->seqno);
|
||||
|
||||
dma_fence_get(fence);
|
||||
err = dma_fence_chain_find_seqno(&fence, 1);
|
||||
dma_fence_put(fence);
|
||||
if (err)
|
||||
pr_err("Reported %d for finding self!\n", err);
|
||||
|
||||
err = -EINVAL;
|
||||
}
|
||||
|
||||
err:
|
||||
fence_chains_fini(&fc);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int find_out_of_order(void *arg)
|
||||
{
|
||||
struct fence_chains fc;
|
||||
struct dma_fence *fence;
|
||||
int err;
|
||||
|
||||
err = fence_chains_init(&fc, 3, seqno_inc);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
dma_fence_signal(fc.fences[1]);
|
||||
|
||||
fence = dma_fence_get(fc.tail);
|
||||
err = dma_fence_chain_find_seqno(&fence, 2);
|
||||
dma_fence_put(fence);
|
||||
if (err) {
|
||||
pr_err("Reported %d for find_seqno()!\n", err);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (fence && fence != fc.chains[1]) {
|
||||
pr_err("Incorrect chain-fence.seqno:%lld reported for completed seqno:2\n",
|
||||
fence->seqno);
|
||||
|
||||
dma_fence_get(fence);
|
||||
err = dma_fence_chain_find_seqno(&fence, 2);
|
||||
dma_fence_put(fence);
|
||||
if (err)
|
||||
pr_err("Reported %d for finding self!\n", err);
|
||||
|
||||
err = -EINVAL;
|
||||
}
|
||||
|
||||
err:
|
||||
fence_chains_fini(&fc);
|
||||
return err;
|
||||
}
|
||||
|
||||
static uint64_t seqno_inc2(unsigned int i)
|
||||
{
|
||||
return 2 * i + 2;
|
||||
}
|
||||
|
||||
static int find_gap(void *arg)
|
||||
{
|
||||
struct fence_chains fc;
|
||||
struct dma_fence *fence;
|
||||
int err;
|
||||
int i;
|
||||
|
||||
err = fence_chains_init(&fc, 64, seqno_inc2);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
for (i = 0; i < fc.chain_length; i++) {
|
||||
fence = dma_fence_get(fc.tail);
|
||||
err = dma_fence_chain_find_seqno(&fence, 2 * i + 1);
|
||||
dma_fence_put(fence);
|
||||
if (err) {
|
||||
pr_err("Reported %d for find_seqno(%d:%d)!\n",
|
||||
err, fc.chain_length + 1, 2 * i + 1);
|
||||
goto err;
|
||||
}
|
||||
if (fence != fc.chains[i]) {
|
||||
pr_err("Incorrect fence.seqno:%lld reported by find_seqno(%d:%d)\n",
|
||||
fence->seqno,
|
||||
fc.chain_length + 1,
|
||||
2 * i + 1);
|
||||
err = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
dma_fence_get(fence);
|
||||
err = dma_fence_chain_find_seqno(&fence, 2 * i + 2);
|
||||
dma_fence_put(fence);
|
||||
if (err) {
|
||||
pr_err("Error reported for finding self\n");
|
||||
goto err;
|
||||
}
|
||||
if (fence != fc.chains[i]) {
|
||||
pr_err("Incorrect fence reported by find self\n");
|
||||
err = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
err:
|
||||
fence_chains_fini(&fc);
|
||||
return err;
|
||||
}
|
||||
|
||||
struct find_race {
|
||||
struct fence_chains fc;
|
||||
atomic_t children;
|
||||
};
|
||||
|
||||
static int __find_race(void *arg)
|
||||
{
|
||||
struct find_race *data = arg;
|
||||
int err = 0;
|
||||
|
||||
while (!kthread_should_stop()) {
|
||||
struct dma_fence *fence = dma_fence_get(data->fc.tail);
|
||||
int seqno;
|
||||
|
||||
seqno = prandom_u32_max(data->fc.chain_length) + 1;
|
||||
|
||||
err = dma_fence_chain_find_seqno(&fence, seqno);
|
||||
if (err) {
|
||||
pr_err("Failed to find fence seqno:%d\n",
|
||||
seqno);
|
||||
dma_fence_put(fence);
|
||||
break;
|
||||
}
|
||||
if (!fence)
|
||||
goto signal;
|
||||
|
||||
err = dma_fence_chain_find_seqno(&fence, seqno);
|
||||
if (err) {
|
||||
pr_err("Reported an invalid fence for find-self:%d\n",
|
||||
seqno);
|
||||
dma_fence_put(fence);
|
||||
break;
|
||||
}
|
||||
|
||||
if (fence->seqno < seqno) {
|
||||
pr_err("Reported an earlier fence.seqno:%lld for seqno:%d\n",
|
||||
fence->seqno, seqno);
|
||||
err = -EINVAL;
|
||||
dma_fence_put(fence);
|
||||
break;
|
||||
}
|
||||
|
||||
dma_fence_put(fence);
|
||||
|
||||
signal:
|
||||
seqno = prandom_u32_max(data->fc.chain_length - 1);
|
||||
dma_fence_signal(data->fc.fences[seqno]);
|
||||
cond_resched();
|
||||
}
|
||||
|
||||
if (atomic_dec_and_test(&data->children))
|
||||
wake_up_var(&data->children);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int find_race(void *arg)
|
||||
{
|
||||
struct find_race data;
|
||||
int ncpus = num_online_cpus();
|
||||
struct task_struct **threads;
|
||||
unsigned long count;
|
||||
int err;
|
||||
int i;
|
||||
|
||||
err = fence_chains_init(&data.fc, CHAIN_SZ, seqno_inc);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
threads = kmalloc_array(ncpus, sizeof(*threads), GFP_KERNEL);
|
||||
if (!threads) {
|
||||
err = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
atomic_set(&data.children, 0);
|
||||
for (i = 0; i < ncpus; i++) {
|
||||
threads[i] = kthread_run(__find_race, &data, "dmabuf/%d", i);
|
||||
if (IS_ERR(threads[i])) {
|
||||
ncpus = i;
|
||||
break;
|
||||
}
|
||||
atomic_inc(&data.children);
|
||||
get_task_struct(threads[i]);
|
||||
}
|
||||
|
||||
wait_var_event_timeout(&data.children,
|
||||
!atomic_read(&data.children),
|
||||
5 * HZ);
|
||||
|
||||
for (i = 0; i < ncpus; i++) {
|
||||
int ret;
|
||||
|
||||
ret = kthread_stop(threads[i]);
|
||||
if (ret && !err)
|
||||
err = ret;
|
||||
put_task_struct(threads[i]);
|
||||
}
|
||||
kfree(threads);
|
||||
|
||||
count = 0;
|
||||
for (i = 0; i < data.fc.chain_length; i++)
|
||||
if (dma_fence_is_signaled(data.fc.fences[i]))
|
||||
count++;
|
||||
pr_info("Completed %lu cycles\n", count);
|
||||
|
||||
err:
|
||||
fence_chains_fini(&data.fc);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int signal_forward(void *arg)
|
||||
{
|
||||
struct fence_chains fc;
|
||||
int err;
|
||||
int i;
|
||||
|
||||
err = fence_chains_init(&fc, 64, seqno_inc);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
for (i = 0; i < fc.chain_length; i++) {
|
||||
dma_fence_signal(fc.fences[i]);
|
||||
|
||||
if (!dma_fence_is_signaled(fc.chains[i])) {
|
||||
pr_err("chain[%d] not signaled!\n", i);
|
||||
err = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (i + 1 < fc.chain_length &&
|
||||
dma_fence_is_signaled(fc.chains[i + 1])) {
|
||||
pr_err("chain[%d] is signaled!\n", i);
|
||||
err = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
err:
|
||||
fence_chains_fini(&fc);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int signal_backward(void *arg)
|
||||
{
|
||||
struct fence_chains fc;
|
||||
int err;
|
||||
int i;
|
||||
|
||||
err = fence_chains_init(&fc, 64, seqno_inc);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
for (i = fc.chain_length; i--; ) {
|
||||
dma_fence_signal(fc.fences[i]);
|
||||
|
||||
if (i > 0 && dma_fence_is_signaled(fc.chains[i])) {
|
||||
pr_err("chain[%d] is signaled!\n", i);
|
||||
err = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 0; i < fc.chain_length; i++) {
|
||||
if (!dma_fence_is_signaled(fc.chains[i])) {
|
||||
pr_err("chain[%d] was not signaled!\n", i);
|
||||
err = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
err:
|
||||
fence_chains_fini(&fc);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __wait_fence_chains(void *arg)
|
||||
{
|
||||
struct fence_chains *fc = arg;
|
||||
|
||||
if (dma_fence_wait(fc->tail, false))
|
||||
return -EIO;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int wait_forward(void *arg)
|
||||
{
|
||||
struct fence_chains fc;
|
||||
struct task_struct *tsk;
|
||||
int err;
|
||||
int i;
|
||||
|
||||
err = fence_chains_init(&fc, CHAIN_SZ, seqno_inc);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
tsk = kthread_run(__wait_fence_chains, &fc, "dmabuf/wait");
|
||||
if (IS_ERR(tsk)) {
|
||||
err = PTR_ERR(tsk);
|
||||
goto err;
|
||||
}
|
||||
get_task_struct(tsk);
|
||||
yield_to(tsk, true);
|
||||
|
||||
for (i = 0; i < fc.chain_length; i++)
|
||||
dma_fence_signal(fc.fences[i]);
|
||||
|
||||
err = kthread_stop(tsk);
|
||||
put_task_struct(tsk);
|
||||
|
||||
err:
|
||||
fence_chains_fini(&fc);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int wait_backward(void *arg)
|
||||
{
|
||||
struct fence_chains fc;
|
||||
struct task_struct *tsk;
|
||||
int err;
|
||||
int i;
|
||||
|
||||
err = fence_chains_init(&fc, CHAIN_SZ, seqno_inc);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
tsk = kthread_run(__wait_fence_chains, &fc, "dmabuf/wait");
|
||||
if (IS_ERR(tsk)) {
|
||||
err = PTR_ERR(tsk);
|
||||
goto err;
|
||||
}
|
||||
get_task_struct(tsk);
|
||||
yield_to(tsk, true);
|
||||
|
||||
for (i = fc.chain_length; i--; )
|
||||
dma_fence_signal(fc.fences[i]);
|
||||
|
||||
err = kthread_stop(tsk);
|
||||
put_task_struct(tsk);
|
||||
|
||||
err:
|
||||
fence_chains_fini(&fc);
|
||||
return err;
|
||||
}
|
||||
|
||||
static void randomise_fences(struct fence_chains *fc)
|
||||
{
|
||||
unsigned int count = fc->chain_length;
|
||||
|
||||
/* Fisher-Yates shuffle courtesy of Knuth */
|
||||
while (--count) {
|
||||
unsigned int swp;
|
||||
|
||||
swp = prandom_u32_max(count + 1);
|
||||
if (swp == count)
|
||||
continue;
|
||||
|
||||
swap(fc->fences[count], fc->fences[swp]);
|
||||
}
|
||||
}
|
||||
|
||||
static int wait_random(void *arg)
|
||||
{
|
||||
struct fence_chains fc;
|
||||
struct task_struct *tsk;
|
||||
int err;
|
||||
int i;
|
||||
|
||||
err = fence_chains_init(&fc, CHAIN_SZ, seqno_inc);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
randomise_fences(&fc);
|
||||
|
||||
tsk = kthread_run(__wait_fence_chains, &fc, "dmabuf/wait");
|
||||
if (IS_ERR(tsk)) {
|
||||
err = PTR_ERR(tsk);
|
||||
goto err;
|
||||
}
|
||||
get_task_struct(tsk);
|
||||
yield_to(tsk, true);
|
||||
|
||||
for (i = 0; i < fc.chain_length; i++)
|
||||
dma_fence_signal(fc.fences[i]);
|
||||
|
||||
err = kthread_stop(tsk);
|
||||
put_task_struct(tsk);
|
||||
|
||||
err:
|
||||
fence_chains_fini(&fc);
|
||||
return err;
|
||||
}
|
||||
|
||||
int dma_fence_chain(void)
|
||||
{
|
||||
static const struct subtest tests[] = {
|
||||
SUBTEST(sanitycheck),
|
||||
SUBTEST(find_seqno),
|
||||
SUBTEST(find_signaled),
|
||||
SUBTEST(find_out_of_order),
|
||||
SUBTEST(find_gap),
|
||||
SUBTEST(find_race),
|
||||
SUBTEST(signal_forward),
|
||||
SUBTEST(signal_backward),
|
||||
SUBTEST(wait_forward),
|
||||
SUBTEST(wait_backward),
|
||||
SUBTEST(wait_random),
|
||||
};
|
||||
int ret;
|
||||
|
||||
pr_info("sizeof(dma_fence_chain)=%zu\n",
|
||||
sizeof(struct dma_fence_chain));
|
||||
|
||||
slab_fences = KMEM_CACHE(mock_fence,
|
||||
SLAB_TYPESAFE_BY_RCU |
|
||||
SLAB_HWCACHE_ALIGN);
|
||||
if (!slab_fences)
|
||||
return -ENOMEM;
|
||||
|
||||
ret = subtests(tests, NULL);
|
||||
|
||||
kmem_cache_destroy(slab_fences);
|
||||
return ret;
|
||||
}
|
||||
Загрузка…
Ссылка в новой задаче