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