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/*
* Copyright © 2009,2012 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:
* Eric Anholt <eric@anholt.net>
* Chris Wilson <chris@chris-wilson.co.uk>
*
*/
/** @file gem_cpu_concurrent_blit.c
*
* This is a test of GTT mmap read/write behavior when writing to active
* buffers.
*/
#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/time.h>
#include "drm.h"
#include "i915_drm.h"
#include "drmtest.h"
#include "intel_bufmgr.h"
#include "intel_batchbuffer.h"
#include "intel_gpu_tools.h"
static void
set_bo(drm_intel_bo *bo, uint32_t val, int width, int height)
{
int size = width * height;
uint32_t *vaddr;
drm_intel_gem_bo_start_gtt_access(bo, true);
vaddr = bo->virtual;
while (size--)
*vaddr++ = val;
}
static void
cmp_bo(drm_intel_bo *bo, uint32_t val, int width, int height)
{
int size = width * height;
uint32_t *vaddr;
drm_intel_gem_bo_start_gtt_access(bo, false);
vaddr = bo->virtual;
while (size--)
assert(*vaddr++ == val);
}
static drm_intel_bo *
create_bo(drm_intel_bufmgr *bufmgr, uint32_t val, int width, int height)
{
drm_intel_bo *bo;
bo = drm_intel_bo_alloc(bufmgr, "bo", 4*width*height, 0);
assert(bo);
/* gtt map doesn't have a write parameter, so just keep the mapping
* around (to avoid the set_domain with the gtt write domain set) and
* manually tell the kernel when we start access the gtt. */
drm_intel_gem_bo_map_gtt(bo);
set_bo(bo, val, width, height);
return bo;
}
int
main(int argc, char **argv)
{
drm_intel_bufmgr *bufmgr;
struct intel_batchbuffer *batch;
int num_buffers = 128, max;
drm_intel_bo *src[128], *dst[128], *dummy = NULL;
int width = 512, height = 512;
int fd;
int i;
drmtest_subtest_init(argc, argv);
fd = drm_open_any();
max = gem_aperture_size (fd) / (1024 * 1024) / 2;
if (num_buffers > max)
num_buffers = max;
bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
drm_intel_bufmgr_gem_enable_reuse(bufmgr);
batch = intel_batchbuffer_alloc(bufmgr, intel_get_drm_devid(fd));
if (!drmtest_only_list_subtests()) {
for (i = 0; i < num_buffers; i++) {
src[i] = create_bo(bufmgr, i, width, height);
dst[i] = create_bo(bufmgr, ~i, width, height);
}
dummy = create_bo(bufmgr, 0, width, height);
}
/* try to overwrite the source values */
if (drmtest_run_subtest("overwrite-source")) {
for (i = 0; i < num_buffers; i++)
intel_copy_bo(batch, dst[i], src[i], width, height);
for (i = num_buffers; i--; )
set_bo(src[i], 0xdeadbeef, width, height);
for (i = 0; i < num_buffers; i++)
cmp_bo(dst[i], i, width, height);
}
/* try to read the results before the copy completes */
if (drmtest_run_subtest("early-read")) {
for (i = num_buffers; i--; )
set_bo(src[i], 0xdeadbeef, width, height);
for (i = 0; i < num_buffers; i++)
intel_copy_bo(batch, dst[i], src[i], width, height);
for (i = num_buffers; i--; )
cmp_bo(dst[i], 0xdeadbeef, width, height);
}
/* and finally try to trick the kernel into loosing the pending write */
if (drmtest_run_subtest("gpu-read-after-write")) {
for (i = num_buffers; i--; )
set_bo(src[i], 0xabcdabcd, width, height);
for (i = 0; i < num_buffers; i++)
intel_copy_bo(batch, dst[i], src[i], width, height);
for (i = num_buffers; i--; )
intel_copy_bo(batch, dummy, dst[i], width, height);
for (i = num_buffers; i--; )
cmp_bo(dst[i], 0xabcdabcd, width, height);
}
return 0;
}
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