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// SPDX-License-Identifier: MIT
/*
* Copyright © 2020 Intel Corporation
*/
/* Just a quick and causal check of the shmem_utils API */
static int igt_shmem_basic(void *ignored)
{
u32 datum = 0xdeadbeef, result;
struct file *file;
u32 *map;
int err;
file = shmem_create_from_data("mock", &datum, sizeof(datum));
if (IS_ERR(file))
return PTR_ERR(file);
result = 0;
err = shmem_read(file, 0, &result, sizeof(result));
if (err)
goto out_file;
if (result != datum) {
pr_err("Incorrect read back from shmemfs: %x != %x\n",
result, datum);
err = -EINVAL;
goto out_file;
}
result = 0xc0ffee;
err = shmem_write(file, 0, &result, sizeof(result));
if (err)
goto out_file;
map = shmem_pin_map(file);
if (!map) {
err = -ENOMEM;
goto out_file;
}
if (*map != result) {
pr_err("Incorrect read back via mmap of last write: %x != %x\n",
*map, result);
err = -EINVAL;
goto out_map;
}
out_map:
shmem_unpin_map(file, map);
out_file:
fput(file);
return err;
}
int shmem_utils_mock_selftests(void)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_shmem_basic),
};
return i915_subtests(tests, NULL);
}
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