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/*
* Copyright © 2009 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>
*
*/
/** @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: Test swizzling by testing pwrite does the inverse of pread
*
* Together with the explicit pread testcase, this should cover our swizzle
* handling.
*
* Note that this test will use swap in an effort to test all of ram.
*/
#include "igt.h"
#include "igt_x86.h"
#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 <drm.h>
IGT_TEST_DESCRIPTION("Test swizzling by testing pwrite does the inverse of"
" pread.");
#define WIDTH 512
#define HEIGHT 512
static uint32_t linear[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, sizeof(linear));
gem_set_tiling(fd, handle, current_tiling_mode, WIDTH * sizeof(uint32_t));
/* Fill the BO with dwords starting at start_val */
data = gem_mmap__gtt(fd, handle, sizeof(linear),
PROT_READ | PROT_WRITE);
gem_set_domain(fd, handle, I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT);
for (i = 0; i < WIDTH*HEIGHT; i++)
data[i] = i;
munmap(data, sizeof(linear));
return handle;
}
static uint32_t
create_bo(int fd)
{
uint32_t handle;
handle = gem_create(fd, sizeof(linear));
gem_set_tiling(fd, handle, current_tiling_mode, WIDTH * sizeof(uint32_t));
return handle;
}
static void copy_wc_page(void *dst, const void *src)
{
igt_memcpy_from_wc(dst, src, PAGE_SIZE);
}
igt_simple_main
{
uint32_t tiling, swizzle;
int count;
int fd;
fd = drm_open_driver(DRIVER_INTEL);
igt_require(gem_available_fences(fd) > 0);
count = SLOW_QUICK(intel_get_total_ram_mb() * 9 / 10, 8) ;
for (int i = 0; i < count/2; i++) {
uint32_t handle, handle_target;
char *data;
int n;
current_tiling_mode = I915_TILING_X;
handle = create_bo_and_fill(fd);
igt_require(gem_get_tiling(fd, handle, &tiling, &swizzle));
gem_read(fd, handle, 0, linear, sizeof(linear));
handle_target = create_bo(fd);
gem_write(fd, handle_target, 0, linear, sizeof(linear));
/* Check the target bo's contents. */
data = gem_mmap__gtt(fd, handle_target, sizeof(linear), PROT_READ);
n = 0;
for (int pfn = 0; pfn < sizeof(linear)/PAGE_SIZE; pfn++) {
uint32_t page[PAGE_SIZE/sizeof(uint32_t)];
copy_wc_page(page, data + PAGE_SIZE*pfn);
for (int j = 0; j < PAGE_SIZE/sizeof(uint32_t); j++) {
igt_assert_f(page[j] == n,
"mismatch at %i: %i\n",
n, page[j]);
n++;
}
}
munmap(data, sizeof(linear));
/* Leak both bos so that we use all of system mem! */
gem_madvise(fd, handle_target, I915_MADV_DONTNEED);
gem_madvise(fd, handle, I915_MADV_DONTNEED);
igt_progress("gem_tiled_pread_pwrite: ", i, count/2);
}
close(fd);
}
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