swh:1:snp:49cd9498d6cccc5e78252c27dcb645bcf7bf0c91
Tip revision: 521a547ced6477c54b4b0cc206000406c221b4d6 authored by Linus Torvalds on 18 September 2022, 20:44:14 UTC
Linux 6.0-rc6
Linux 6.0-rc6
Tip revision: 521a547
st-dma-fence-unwrap.c
// SPDX-License-Identifier: MIT
/*
* Copyright (C) 2022 Advanced Micro Devices, Inc.
*/
#include <linux/dma-fence.h>
#include <linux/dma-fence-array.h>
#include <linux/dma-fence-chain.h>
#include <linux/dma-fence-unwrap.h>
#include "selftest.h"
#define CHAIN_SZ (4 << 10)
struct mock_fence {
struct dma_fence base;
spinlock_t lock;
};
static const char *mock_name(struct dma_fence *f)
{
return "mock";
}
static const struct dma_fence_ops mock_ops = {
.get_driver_name = mock_name,
.get_timeline_name = mock_name,
};
static struct dma_fence *mock_fence(void)
{
struct mock_fence *f;
f = kmalloc(sizeof(*f), GFP_KERNEL);
if (!f)
return NULL;
spin_lock_init(&f->lock);
dma_fence_init(&f->base, &mock_ops, &f->lock,
dma_fence_context_alloc(1), 1);
return &f->base;
}
static struct dma_fence *mock_array(unsigned int num_fences, ...)
{
struct dma_fence_array *array;
struct dma_fence **fences;
va_list valist;
int i;
fences = kcalloc(num_fences, sizeof(*fences), GFP_KERNEL);
if (!fences)
goto error_put;
va_start(valist, num_fences);
for (i = 0; i < num_fences; ++i)
fences[i] = va_arg(valist, typeof(*fences));
va_end(valist);
array = dma_fence_array_create(num_fences, fences,
dma_fence_context_alloc(1),
1, false);
if (!array)
goto error_free;
return &array->base;
error_free:
kfree(fences);
error_put:
va_start(valist, num_fences);
for (i = 0; i < num_fences; ++i)
dma_fence_put(va_arg(valist, typeof(*fences)));
va_end(valist);
return NULL;
}
static struct dma_fence *mock_chain(struct dma_fence *prev,
struct dma_fence *fence)
{
struct dma_fence_chain *f;
f = dma_fence_chain_alloc();
if (!f) {
dma_fence_put(prev);
dma_fence_put(fence);
return NULL;
}
dma_fence_chain_init(f, prev, fence, 1);
return &f->base;
}
static int sanitycheck(void *arg)
{
struct dma_fence *f, *chain, *array;
int err = 0;
f = mock_fence();
if (!f)
return -ENOMEM;
array = mock_array(1, f);
if (!array)
return -ENOMEM;
chain = mock_chain(NULL, array);
if (!chain)
return -ENOMEM;
dma_fence_put(chain);
return err;
}
static int unwrap_array(void *arg)
{
struct dma_fence *fence, *f1, *f2, *array;
struct dma_fence_unwrap iter;
int err = 0;
f1 = mock_fence();
if (!f1)
return -ENOMEM;
f2 = mock_fence();
if (!f2) {
dma_fence_put(f1);
return -ENOMEM;
}
array = mock_array(2, f1, f2);
if (!array)
return -ENOMEM;
dma_fence_unwrap_for_each(fence, &iter, array) {
if (fence == f1) {
f1 = NULL;
} else if (fence == f2) {
f2 = NULL;
} else {
pr_err("Unexpected fence!\n");
err = -EINVAL;
}
}
if (f1 || f2) {
pr_err("Not all fences seen!\n");
err = -EINVAL;
}
dma_fence_put(array);
return err;
}
static int unwrap_chain(void *arg)
{
struct dma_fence *fence, *f1, *f2, *chain;
struct dma_fence_unwrap iter;
int err = 0;
f1 = mock_fence();
if (!f1)
return -ENOMEM;
f2 = mock_fence();
if (!f2) {
dma_fence_put(f1);
return -ENOMEM;
}
chain = mock_chain(f1, f2);
if (!chain)
return -ENOMEM;
dma_fence_unwrap_for_each(fence, &iter, chain) {
if (fence == f1) {
f1 = NULL;
} else if (fence == f2) {
f2 = NULL;
} else {
pr_err("Unexpected fence!\n");
err = -EINVAL;
}
}
if (f1 || f2) {
pr_err("Not all fences seen!\n");
err = -EINVAL;
}
dma_fence_put(chain);
return err;
}
static int unwrap_chain_array(void *arg)
{
struct dma_fence *fence, *f1, *f2, *array, *chain;
struct dma_fence_unwrap iter;
int err = 0;
f1 = mock_fence();
if (!f1)
return -ENOMEM;
f2 = mock_fence();
if (!f2) {
dma_fence_put(f1);
return -ENOMEM;
}
array = mock_array(2, f1, f2);
if (!array)
return -ENOMEM;
chain = mock_chain(NULL, array);
if (!chain)
return -ENOMEM;
dma_fence_unwrap_for_each(fence, &iter, chain) {
if (fence == f1) {
f1 = NULL;
} else if (fence == f2) {
f2 = NULL;
} else {
pr_err("Unexpected fence!\n");
err = -EINVAL;
}
}
if (f1 || f2) {
pr_err("Not all fences seen!\n");
err = -EINVAL;
}
dma_fence_put(chain);
return err;
}
static int unwrap_merge(void *arg)
{
struct dma_fence *fence, *f1, *f2, *f3;
struct dma_fence_unwrap iter;
int err = 0;
f1 = mock_fence();
if (!f1)
return -ENOMEM;
f2 = mock_fence();
if (!f2) {
err = -ENOMEM;
goto error_put_f1;
}
f3 = dma_fence_unwrap_merge(f1, f2);
if (!f3) {
err = -ENOMEM;
goto error_put_f2;
}
dma_fence_unwrap_for_each(fence, &iter, f3) {
if (fence == f1) {
dma_fence_put(f1);
f1 = NULL;
} else if (fence == f2) {
dma_fence_put(f2);
f2 = NULL;
} else {
pr_err("Unexpected fence!\n");
err = -EINVAL;
}
}
if (f1 || f2) {
pr_err("Not all fences seen!\n");
err = -EINVAL;
}
dma_fence_put(f3);
error_put_f2:
dma_fence_put(f2);
error_put_f1:
dma_fence_put(f1);
return err;
}
static int unwrap_merge_complex(void *arg)
{
struct dma_fence *fence, *f1, *f2, *f3, *f4, *f5;
struct dma_fence_unwrap iter;
int err = -ENOMEM;
f1 = mock_fence();
if (!f1)
return -ENOMEM;
f2 = mock_fence();
if (!f2)
goto error_put_f1;
f3 = dma_fence_unwrap_merge(f1, f2);
if (!f3)
goto error_put_f2;
/* The resulting array has the fences in reverse */
f4 = dma_fence_unwrap_merge(f2, f1);
if (!f4)
goto error_put_f3;
/* Signaled fences should be filtered, the two arrays merged. */
f5 = dma_fence_unwrap_merge(f3, f4, dma_fence_get_stub());
if (!f5)
goto error_put_f4;
err = 0;
dma_fence_unwrap_for_each(fence, &iter, f5) {
if (fence == f1) {
dma_fence_put(f1);
f1 = NULL;
} else if (fence == f2) {
dma_fence_put(f2);
f2 = NULL;
} else {
pr_err("Unexpected fence!\n");
err = -EINVAL;
}
}
if (f1 || f2) {
pr_err("Not all fences seen!\n");
err = -EINVAL;
}
dma_fence_put(f5);
error_put_f4:
dma_fence_put(f4);
error_put_f3:
dma_fence_put(f3);
error_put_f2:
dma_fence_put(f2);
error_put_f1:
dma_fence_put(f1);
return err;
}
int dma_fence_unwrap(void)
{
static const struct subtest tests[] = {
SUBTEST(sanitycheck),
SUBTEST(unwrap_array),
SUBTEST(unwrap_chain),
SUBTEST(unwrap_chain_array),
SUBTEST(unwrap_merge),
SUBTEST(unwrap_merge_complex),
};
return subtests(tests, NULL);
}