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/*
* Copyright © 2015 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:
* Chris Wilson <chris@chris-wilson.co.uk>
*
*/
/* Exercises the basic execbuffer using object alignments */
#include "igt.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 "drm.h"
IGT_TEST_DESCRIPTION("Exercises the basic execbuffer using object alignments");
static uint32_t find_last_bit(uint64_t x)
{
uint32_t i = 0;
while (x) {
x >>= 1;
i++;
}
return i;
}
static uint32_t file_max(void)
{
static uint32_t max;
if (max == 0) {
FILE *file = fopen("/proc/sys/fs/file-max", "r");
max = 80000;
if (file) {
igt_assert(fscanf(file, "%d", &max) == 1);
fclose(file);
}
max /= 2;
}
return max;
}
static void many(int fd)
{
uint32_t bbe = MI_BATCH_BUFFER_END;
struct drm_i915_gem_exec_object2 *execobj;
struct drm_i915_gem_execbuffer2 execbuf;
uint64_t gtt_size, ram_size;
uint64_t alignment, max_alignment, count, i;
gtt_size = gem_aperture_size(fd);
if (!gem_uses_full_ppgtt(fd))
gtt_size /= 2; /* We have to *share* our GTT! */
ram_size = intel_get_total_ram_mb();
ram_size *= 1024 * 1024;
count = ram_size / 4096;
if (count > file_max()) /* vfs cap */
count = file_max();
max_alignment = find_last_bit(gtt_size / count);
if (max_alignment <= 13)
max_alignment = 4096;
else
max_alignment = 1ull << (max_alignment - 1);
count = gtt_size / max_alignment / 2;
igt_info("gtt_size=%lld MiB, max-alignment=%lld, count=%lld\n",
(long long)gtt_size/1024/1024,
(long long)max_alignment,
(long long)count);
intel_require_memory(count, 4096, CHECK_RAM);
execobj = calloc(sizeof(*execobj), count + 1);
igt_assert(execobj);
for (i = 0; i < count; i++) {
execobj[i].handle = gem_create(fd, 4096);
if ((gtt_size-1) >> 32)
execobj[i].flags = 1<<3; /* EXEC_OBJECT_SUPPORTS_48B_ADDRESS */
}
execobj[i].handle = gem_create(fd, 4096);
if ((gtt_size-1) >> 32)
execobj[i].flags = 1<<3; /* EXEC_OBJECT_SUPPORTS_48B_ADDRESS */
gem_write(fd, execobj[i].handle, 0, &bbe, sizeof(bbe));
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)execobj;
execbuf.buffer_count = count + 1;
igt_require(__gem_execbuf(fd, &execbuf) == 0);
for (alignment = 4096; alignment < gtt_size; alignment <<= 1) {
for (i = 0; i < count; i++)
execobj[i].alignment = alignment;
if (alignment > max_alignment) {
uint64_t factor = alignment / max_alignment;
execbuf.buffer_count = 2*count / factor;
execbuf.buffers_ptr =
(uintptr_t)(execobj + count - execbuf.buffer_count + 1);
}
igt_debug("testing %lld x alignment=%#llx [%db]\n",
(long long)execbuf.buffer_count - 1,
(long long)alignment,
find_last_bit(alignment)-1);
gem_execbuf(fd, &execbuf);
for(i = count - execbuf.buffer_count + 1; i < count; i++) {
igt_assert_eq_u64(execobj[i].alignment, alignment);
igt_assert_eq_u64(execobj[i].offset % alignment, 0);
}
}
for (i = 0; i < count; i++)
gem_close(fd, execobj[i].handle);
gem_close(fd, execobj[i].handle);
free(execobj);
}
static void single(int fd)
{
struct drm_i915_gem_exec_object2 execobj;
struct drm_i915_gem_execbuffer2 execbuf;
uint32_t batch = MI_BATCH_BUFFER_END;
uint64_t gtt_size;
int non_pot;
memset(&execobj, 0, sizeof(execobj));
execobj.handle = gem_create(fd, 4096);
execobj.flags = 1<<3; /* EXEC_OBJECT_SUPPORTS_48B_ADDRESS */
gem_write(fd, execobj.handle, 0, &batch, sizeof(batch));
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)&execobj;
execbuf.buffer_count = 1;
gtt_size = gem_aperture_size(fd);
if (__gem_execbuf(fd, &execbuf)) {
execobj.flags = 0;
gtt_size = 1ull << 32;
gem_execbuf(fd, &execbuf);
}
execobj.alignment = 3*4096;
non_pot = __gem_execbuf(fd, &execbuf) == 0;
igt_debug("execbuffer() accepts non-power-of-two alignment? %s\n",
non_pot ? "yes" : "no");
for (execobj.alignment = 4096;
execobj.alignment <= 64<<20;
execobj.alignment += 4096) {
if (!non_pot && execobj.alignment & -execobj.alignment)
continue;
igt_debug("starting offset: %#llx, next alignment: %#llx\n",
(long long)execobj.offset,
(long long)execobj.alignment);
gem_execbuf(fd, &execbuf);
igt_assert_eq_u64(execobj.offset % execobj.alignment, 0);
}
for (execobj.alignment = 4096;
execobj.alignment < gtt_size;
execobj.alignment <<= 1) {
igt_debug("starting offset: %#llx, next alignment: %#llx [%db]\n",
(long long)execobj.offset,
(long long)execobj.alignment,
find_last_bit(execobj.alignment)-1);
gem_execbuf(fd, &execbuf);
igt_assert_eq_u64(execobj.offset % execobj.alignment, 0);
}
gem_close(fd, execobj.handle);
}
igt_main
{
int fd = -1;
igt_fixture
fd = drm_open_driver(DRIVER_INTEL);
igt_subtest("single") /* basic! */
single(fd);
igt_subtest("many")
many(fd);
}
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