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/*
* Copyright © 2011 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>
*
*/
/** @file gem_tiled_pread_pwrite.c
*
* This is a test of pread's behavior on tiled objects with respect to the
* reported swizzling value.
*
* The goal is to exercise the slow_bit17_copy path for reading on bit17
* machines, but will also be useful for catching swizzling value bugs on
* other systems.
*/
/*
* Testcase: Exercise swizzle code for swapping
*
* The swizzle checks in the swapin path are at a different place than the ones
* for pread/pwrite, so we need to check them separately.
*
* This test obviously needs swap present (and exits if none is detected).
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <inttypes.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <pthread.h>
#include <drm.h>
#include "ioctl_wrappers.h"
#include "drmtest.h"
#include "intel_io.h"
#include "igt_aux.h"
#define WIDTH 512
#define HEIGHT 512
#define LINEAR_DWORDS (4 * WIDTH * HEIGHT)
static uint32_t current_tiling_mode;
#define PAGE_SIZE 4096
static uint32_t
create_bo_and_fill(int fd)
{
uint32_t handle;
uint32_t *data;
int i;
handle = gem_create(fd, LINEAR_DWORDS);
gem_set_tiling(fd, handle, current_tiling_mode, WIDTH * sizeof(uint32_t));
/* Fill the BO with dwords starting at start_val */
data = gem_mmap(fd, handle, LINEAR_DWORDS, PROT_READ | PROT_WRITE);
if (data == NULL && errno == ENOSPC)
return 0;
for (i = 0; i < WIDTH*HEIGHT; i++)
data[i] = i;
munmap(data, LINEAR_DWORDS);
return handle;
}
uint32_t *bo_handles;
struct thread {
pthread_t thread;
int *idx_arr;
int fd, count;
};
static void
check_bo(int fd, uint32_t handle)
{
uint32_t *data;
int j;
/* Check the target bo's contents. */
data = gem_mmap(fd, handle, LINEAR_DWORDS, PROT_READ | PROT_WRITE);
j = rand() % (WIDTH * HEIGHT);
igt_assert_f(data[j] == j, "mismatch at %i: %i\n", j, data[j]);
munmap(data, LINEAR_DWORDS);
}
static void *thread_run(void *data)
{
struct thread *t = data;
int i;
for (i = 0; i < t->count; i++)
check_bo(t->fd, bo_handles[t->idx_arr[i]]);
return NULL;
}
static void thread_init(struct thread *t, int fd, int count)
{
int i;
t->fd = fd;
t->count = count;
t->idx_arr = calloc(count, sizeof(int));
igt_assert(t->idx_arr);
for (i = 0; i < count; i++)
t->idx_arr[i] = i;
igt_permute_array(t->idx_arr, count, igt_exchange_int);
}
static void thread_fini(struct thread *t)
{
free(t->idx_arr);
}
igt_simple_main
{
struct thread *threads;
int fd, n, count, num_threads;
current_tiling_mode = I915_TILING_X;
igt_skip_on_simulation();
intel_purge_vm_caches();
fd = drm_open_any();
/* need slightly more than available memory */
count = intel_get_total_ram_mb() + intel_get_total_swap_mb() / 4;
bo_handles = calloc(count, sizeof(uint32_t));
igt_assert(bo_handles);
num_threads = gem_available_fences(fd);
threads = calloc(num_threads, sizeof(struct thread));
igt_assert(threads);
igt_log(IGT_LOG_INFO,
"Using %d 1MiB objects (available RAM: %ld/%ld, swap: %ld)\n",
count,
(long)intel_get_avail_ram_mb(),
(long)intel_get_total_ram_mb(),
(long)intel_get_total_swap_mb());
igt_require(intel_check_memory(count, 1024*1024, CHECK_RAM | CHECK_SWAP));
for (n = 0; n < count; n++) {
bo_handles[n] = create_bo_and_fill(fd);
/* Not enough mmap address space possible. */
igt_require(bo_handles[n]);
}
thread_init(&threads[0], fd, count);
thread_run(&threads[0]);
thread_fini(&threads[0]);
/* Once more with threads */
igt_subtest("threaded") {
for (n = 0; n < num_threads; n++) {
thread_init(&threads[n], fd, count);
pthread_create(&threads[n].thread, NULL, thread_run, &threads[n]);
}
for (n = 0; n < num_threads; n++) {
pthread_join(threads[n].thread, NULL);
thread_fini(&threads[n]);
}
}
close(fd);
}
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