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/*
* Copyright © 2014 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>
*
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <inttypes.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include "drm.h"
#include "ioctl_wrappers.h"
#include "drmtest.h"
#include "intel_io.h"
/* Simulates SNA behaviour using negative self-relocations for
* STATE_BASE_ADDRESS command packets. If they wrap around (to values greater
* than the total size of the GTT), the GPU will hang.
* See https://bugs.freedesktop.org/show_bug.cgi?id=78533
*/
static int negative_reloc(int fd, uint32_t handle)
{
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 gem_exec;
struct drm_i915_gem_relocation_entry gem_reloc[1000];
uint64_t gtt_max = gem_aperture_size(fd);
uint32_t buf[1024];
int i;
memset(&gem_exec, 0, sizeof(gem_exec));
gem_exec.handle = handle;
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)&gem_exec;
execbuf.buffer_count = 1;
execbuf.batch_len = 8;
do_or_die(drmIoctl(fd,
DRM_IOCTL_I915_GEM_EXECBUFFER2,
&execbuf));
printf("Found offset %ld for 4k batch\n", (long)gem_exec.offset);
igt_require(gem_exec.offset < 16*1024*1024);
memset(gem_reloc, 0, sizeof(gem_reloc));
for (i = 0; i < sizeof(gem_reloc)/sizeof(gem_reloc[0]); i++) {
gem_reloc[i].offset = 8 + 4*i;
gem_reloc[i].delta = -16*1024*i;
gem_reloc[i].target_handle = handle;
gem_reloc[i].read_domains = I915_GEM_DOMAIN_COMMAND;
}
gem_exec.relocation_count = 1000;
gem_exec.relocs_ptr = (uintptr_t)gem_reloc;
do_or_die(drmIoctl(fd,
DRM_IOCTL_I915_GEM_EXECBUFFER2,
&execbuf));
gem_read(fd, handle, 0, buf, sizeof(buf));
for (i = 0; i < sizeof(gem_reloc)/sizeof(gem_reloc[0]); i++)
igt_assert(buf[2 + i] < gtt_max);
return 0;
}
uint32_t batch[2] = {MI_BATCH_BUFFER_END};
uint32_t handle;
int fd;
igt_main
{
igt_fixture {
fd = drm_open_any();
handle = gem_create(fd, 4096);
gem_write(fd, handle, 0, batch, sizeof(batch));
}
igt_subtest("negative-reloc")
negative_reloc(fd, handle);
igt_fixture {
gem_close(fd, handle);
close(fd);
}
}
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