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/*
* Copyright © 2012 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:
* Daniel Vetter <daniel.vetter@ffwll.ch>
*
*/
/*
* Testcase: Check whether prime import/export works on the same device
*
* ... but with different fds, i.e. the wayland usecase.
*/
#include <unistd.h>
#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 <sys/mman.h>
#include <sys/ioctl.h>
#include "drm.h"
#include "i915_drm.h"
#include "drmtest.h"
#define BO_SIZE (16*1024)
static void
check_bo(int fd1, uint32_t handle1, int fd2, uint32_t handle2)
{
char *ptr1, *ptr2;
static char counter = 0;
int i;
ptr1 = gem_mmap(fd1, handle1, BO_SIZE, PROT_READ | PROT_WRITE);
ptr2 = gem_mmap(fd2, handle2, BO_SIZE, PROT_READ | PROT_WRITE);
assert(ptr1);
/* check whether it's still our old object first. */
for (i = 0; i < BO_SIZE; i++) {
assert(ptr1[i] == counter);
assert(ptr2[i] == counter);
}
counter++;
memset(ptr1, counter, BO_SIZE);
assert(memcmp(ptr1, ptr2, BO_SIZE) == 0);
munmap(ptr1, BO_SIZE);
munmap(ptr2, BO_SIZE);
}
int main(int argc, char **argv)
{
int fd1, fd2;
uint32_t handle, handle_import1, handle_import2, handle_selfimport;
int dma_buf_fd;
fd1 = drm_open_any();
fd2 = drm_open_any();
handle = gem_create(fd1, BO_SIZE);
dma_buf_fd = prime_handle_to_fd(fd1, handle);
handle_import1 = prime_fd_to_handle(fd2, dma_buf_fd);
check_bo(fd1, handle, fd2, handle_import1);
/* reimport should give us the same handle so that userspace can check
* whether it has that bo already somewhere. */
handle_import2 = prime_fd_to_handle(fd2, dma_buf_fd);
assert(handle_import1 == handle_import2);
/* Same for re-importing on the exporting fd. */
handle_selfimport = prime_fd_to_handle(fd1, dma_buf_fd);
assert(handle == handle_selfimport);
/* close dma_buf, check whether nothing disappears. */
close(dma_buf_fd);
check_bo(fd1, handle, fd2, handle_import1);
gem_close(fd1, handle);
check_bo(fd2, handle_import1, fd2, handle_import1);
/* re-import into old exporter */
dma_buf_fd = prime_handle_to_fd(fd2, handle_import1);
/* but drop all references to the obj in between */
gem_close(fd2, handle_import1);
handle = prime_fd_to_handle(fd1, dma_buf_fd);
handle_import1 = prime_fd_to_handle(fd2, dma_buf_fd);
check_bo(fd1, handle, fd2, handle_import1);
/* Completely rip out exporting fd. */
close(fd1);
check_bo(fd2, handle_import1, fd2, handle_import1);
return 0;
}
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