tests/gem_evict_alignment.c

/*
 * Copyright © 2011,2012 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:
 *    Chris Wilson <chris@chris-wilson.co.uk>
 *    Daniel Vetter <daniel.vetter@ffwll.ch>
 *
 */

/*
 * Testcase: run a couple of big batches to force the unbind on misalignment code.
 */

#include "igt.h"
#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>


IGT_TEST_DESCRIPTION("Run a couple of big batches to force the unbind on"
		     " misalignment code.");

#define HEIGHT 256
#define WIDTH 1024

static void
copy(int fd, uint32_t dst, uint32_t src, uint32_t *all_bo,
     uint64_t n_bo, uint64_t alignment, int error)
{
	uint32_t batch[12];
	struct drm_i915_gem_relocation_entry reloc[2];
	struct drm_i915_gem_exec_object2 *obj;
	struct drm_i915_gem_execbuffer2 exec;
	uint32_t handle;
	int n, ret, i=0;

	batch[i++] = (XY_SRC_COPY_BLT_CMD |
		    XY_SRC_COPY_BLT_WRITE_ALPHA |
		    XY_SRC_COPY_BLT_WRITE_RGB | 6);
	if (intel_gen(intel_get_drm_devid(fd)) >= 8)
		batch[i - 1] += 2;
	batch[i++] = (3 << 24) | /* 32 bits */
		  (0xcc << 16) | /* copy ROP */
		  WIDTH*4;
	batch[i++] = 0; /* dst x1,y1 */
	batch[i++] = (HEIGHT << 16) | WIDTH; /* dst x2,y2 */
	batch[i++] = 0; /* dst reloc */
	if (intel_gen(intel_get_drm_devid(fd)) >= 8)
		batch[i++] = 0; /* FIXME */
	batch[i++] = 0; /* src x1,y1 */
	batch[i++] = WIDTH*4;
	batch[i++] = 0; /* src reloc */
	if (intel_gen(intel_get_drm_devid(fd)) >= 8)
		batch[i++] = 0; /* FIXME */
	batch[i++] = MI_BATCH_BUFFER_END;
	batch[i++] = MI_NOOP;

	handle = gem_create(fd, 4096);
	gem_write(fd, handle, 0, batch, sizeof(batch));

	reloc[0].target_handle = dst;
	reloc[0].delta = 0;
	reloc[0].offset = 4 * sizeof(batch[0]);
	reloc[0].presumed_offset = 0;
	reloc[0].read_domains = I915_GEM_DOMAIN_RENDER;
	reloc[0].write_domain = I915_GEM_DOMAIN_RENDER;

	reloc[1].target_handle = src;
	reloc[1].delta = 0;
	reloc[1].offset = 7 * sizeof(batch[0]);
	reloc[1].presumed_offset = 0;
	reloc[1].read_domains = I915_GEM_DOMAIN_RENDER;
	reloc[1].write_domain = 0;

	obj = calloc(n_bo + 1, sizeof(*obj));
	for (n = 0; n < n_bo; n++) {
		obj[n].handle = all_bo[n];
		obj[n].alignment = alignment;
	}
	obj[n].handle = handle;
	obj[n].relocation_count = 2;
	obj[n].relocs_ptr = (uintptr_t)reloc;

	exec.buffers_ptr = (uintptr_t)obj;
	exec.buffer_count = n_bo + 1;
	exec.batch_start_offset = 0;
	exec.batch_len = i * 4;
	exec.DR1 = exec.DR4 = 0;
	exec.num_cliprects = 0;
	exec.cliprects_ptr = 0;
	exec.flags = HAS_BLT_RING(intel_get_drm_devid(fd)) ? I915_EXEC_BLT : 0;
	i915_execbuffer2_set_context_id(exec, 0);
	exec.rsvd2 = 0;

	ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &exec);
	if (ret)
		ret = errno;
	igt_assert_eq(ret, error);

	gem_close(fd, handle);
	free(obj);
}

static void minor_evictions(int fd, uint64_t size, uint64_t count)
{
	uint32_t *bo, *sel;
	uint64_t n, m, alignment;
	int pass, fail;

	intel_require_memory(2 * count, size, CHECK_RAM);

	bo = malloc(3*count*sizeof(*bo));
	igt_assert(bo);

	for (n = 0; n < 2*count; n++)
		bo[n] = gem_create(fd, size);

	sel = bo + n;
	for (alignment = m = 4096; alignment <= size; alignment <<= 1) {
		for (fail = 0; fail < 10; fail++) {
			for (pass = 0; pass < 100; pass++) {
				for (n = 0; n < count; n++, m += 7)
					sel[n] = bo[m%(2*count)];
				copy(fd, sel[0], sel[1], sel, count, alignment, 0);
			}
			copy(fd, bo[0], bo[0], bo, 2*count, alignment, ENOSPC);
		}
	}

	for (n = 0; n < 2*count; n++)
		gem_close(fd, bo[n]);
	free(bo);
}

static void major_evictions(int fd, uint64_t size, uint64_t count)
{
	uint64_t n, m, alignment, max;
	int loop;
	uint32_t *bo;

	intel_require_memory(count, size, CHECK_RAM);

	bo = malloc(count*sizeof(*bo));
	igt_assert(bo);

	for (n = 0; n < count; n++)
		bo[n] = gem_create(fd, size);

	max = gem_aperture_size(fd) - size;
	for (alignment = m = 4096; alignment < max; alignment <<= 1) {
		for (loop = 0; loop < 100; loop++, m += 17) {
			n = m % count;
			copy(fd, bo[n], bo[n], &bo[n], 1, alignment, 0);
		}
	}

	for (n = 0; n < count; n++)
		gem_close(fd, bo[n]);
	free(bo);
}

igt_main
{
	uint64_t size, count;
	int fd = -1;

	igt_fixture {
		fd = drm_open_driver(DRIVER_INTEL);
	}

	igt_subtest("minor-normal") {
		size = 1024 * 1024;
		count = 3*gem_aperture_size(fd) / size / 4;
		minor_evictions(fd, size, count);
	}

	igt_subtest("major-normal") {
		size = 3*gem_aperture_size(fd) / 4;
		count = 4;
		major_evictions(fd, size, count);
	}

	igt_fork_signal_helper();
	igt_subtest("minor-interruptible") {
		size = 1024 * 1024;
		count = 3*gem_aperture_size(fd) / size / 4;
		minor_evictions(fd, size, count);
	}

	igt_subtest("major-interruptible") {
		size = 3*gem_aperture_size(fd) / 4;
		count = 4;
		major_evictions(fd, size, count);
	}

	igt_subtest("minor-hang") {
		igt_fork_hang_helper();
		size = 1024 * 1024;
		count = 3*gem_aperture_size(fd) / size / 4;
		minor_evictions(fd, size, count);
	}

	igt_subtest("major-hang") {
		size = 3*gem_aperture_size(fd) / 4;
		count = 4;
		major_evictions(fd, size, count);
	}
	igt_stop_signal_helper();

	igt_fixture {
		igt_stop_hang_helper();
		close(fd);
	}
}