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/*
* Copyright © 2008 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <fcntl.h>
#include <inttypes.h>
#include <errno.h>
#include <sys/stat.h>
#include "drm.h"
#define OBJECT_SIZE 16384
int do_read(int fd, int handle, void *buf, int offset, int size)
{
struct drm_gem_pread read;
/* Ensure that we don't have any convenient data in buf in case
* we fail.
*/
memset(buf, 0xd0, size);
memset(&read, 0, sizeof(read));
read.handle = handle;
read.data_ptr = (uintptr_t)buf;
read.size = size;
read.offset = offset;
return ioctl(fd, DRM_IOCTL_GEM_PREAD, &read);
}
int do_write(int fd, int handle, void *buf, int offset, int size)
{
struct drm_gem_pwrite write;
memset(&write, 0, sizeof(write));
write.handle = handle;
write.data_ptr = (uintptr_t)buf;
write.size = size;
write.offset = offset;
return ioctl(fd, DRM_IOCTL_GEM_PWRITE, &write);
}
int main(int argc, char **argv)
{
int fd;
struct drm_gem_create create;
uint8_t expected[OBJECT_SIZE];
uint8_t buf[OBJECT_SIZE];
int ret;
int handle;
fd = drm_open_any();
memset(&create, 0, sizeof(create));
create.size = OBJECT_SIZE;
ret = ioctl(fd, DRM_IOCTL_GEM_CREATE, &create);
assert(ret == 0);
handle = create.handle;
printf("Testing contents of newly created object.\n");
ret = do_read(fd, handle, buf, 0, OBJECT_SIZE);
assert(ret == 0);
memset(&expected, 0, sizeof(expected));
assert(memcmp(expected, buf, sizeof(expected)) == 0);
printf("Testing read beyond end of buffer.\n");
ret = do_read(fd, handle, buf, OBJECT_SIZE / 2, OBJECT_SIZE);
assert(ret == -1 && errno == EINVAL);
printf("Testing full write of buffer\n");
memset(buf, 0, sizeof(buf));
memset(buf + 1024, 0x01, 1024);
memset(expected + 1024, 0x01, 1024);
ret = do_write(fd, handle, buf, 0, OBJECT_SIZE);
assert(ret == 0);
ret = do_read(fd, handle, buf, 0, OBJECT_SIZE);
assert(ret == 0);
assert(memcmp(buf, expected, sizeof(buf)) == 0);
printf("Testing partial write of buffer\n");
memset(buf + 4096, 0x02, 1024);
memset(expected + 4096, 0x02, 1024);
ret = do_write(fd, handle, buf + 4096, 4096, 1024);
assert(ret == 0);
ret = do_read(fd, handle, buf, 0, OBJECT_SIZE);
assert(ret == 0);
assert(memcmp(buf, expected, sizeof(buf)) == 0);
printf("Testing partial read of buffer\n");
ret = do_read(fd, handle, buf, 512, 1024);
assert(ret == 0);
assert(memcmp(buf, expected + 512, 1024) == 0);
close(fd);
return 0;
}
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