예제 #1
0
static void exec0(int fd)
{
	struct drm_i915_gem_execbuffer2 execbuf;
	struct drm_i915_gem_exec_object2 exec[1];
	uint32_t buf[2] = { MI_BATCH_BUFFER_END, 0 };

	/* Just try executing with a zero-length bo.
	 * We expect the kernel to either accept the nop batch, or reject it
	 * for the zero-length buffer, but never crash.
	 */

	exec[0].handle = gem_create(fd, 4096);
	gem_write(fd, exec[0].handle, 0, buf, sizeof(buf));
	exec[0].relocation_count = 0;
	exec[0].relocs_ptr = 0;
	exec[0].alignment = 0;
	exec[0].offset = 0;
	exec[0].flags = 0;
	exec[0].rsvd1 = 0;
	exec[0].rsvd2 = 0;

	execbuf.buffers_ptr = (uintptr_t)exec;
	execbuf.buffer_count = 1;
	execbuf.batch_start_offset = 0;
	execbuf.batch_len = sizeof(buf);
	execbuf.cliprects_ptr = 0;
	execbuf.num_cliprects = 0;
	execbuf.DR1 = 0;
	execbuf.DR4 = 0;
	execbuf.flags = 0;
	i915_execbuffer2_set_context_id(execbuf, 0);
	execbuf.rsvd2 = 0;

	igt_info("trying to run an empty batchbuffer\n");
	gem_exec(fd, &execbuf);

	gem_close(fd, exec[0].handle);
}
static void run(int object_size)
{
	struct drm_i915_gem_execbuffer2 execbuf;
	struct drm_i915_gem_exec_object2 exec[3];
	struct drm_i915_gem_relocation_entry reloc[4];
	uint32_t buf[20];
	uint32_t handle, src, dst;
	int fd, len, count;
	int ring;

	fd = drm_open_any();
	handle = gem_create(fd, 4096);
	src = gem_create(fd, object_size);
	dst = gem_create(fd, object_size);

	len = gem_linear_blt(buf, src, dst, object_size, reloc);
	gem_write(fd, handle, 0, buf, len);

	exec[0].handle = src;
	exec[0].relocation_count = 0;
	exec[0].relocs_ptr = 0;
	exec[0].alignment = 0;
	exec[0].offset = 0;
	exec[0].flags = 0;
	exec[0].rsvd1 = 0;
	exec[0].rsvd2 = 0;

	exec[1].handle = dst;
	exec[1].relocation_count = 0;
	exec[1].relocs_ptr = 0;
	exec[1].alignment = 0;
	exec[1].offset = 0;
	exec[1].flags = 0;
	exec[1].rsvd1 = 0;
	exec[1].rsvd2 = 0;

	exec[2].handle = handle;
	exec[2].relocation_count = len > 40 ? 4 : 2;
	exec[2].relocs_ptr = (uintptr_t)reloc;
	exec[2].alignment = 0;
	exec[2].offset = 0;
	exec[2].flags = 0;
	exec[2].rsvd1 = 0;
	exec[2].rsvd2 = 0;

	ring = 0;
	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
		ring = I915_EXEC_BLT;

	execbuf.buffers_ptr = (uintptr_t)exec;
	execbuf.buffer_count = 3;
	execbuf.batch_start_offset = 0;
	execbuf.batch_len = len;
	execbuf.cliprects_ptr = 0;
	execbuf.num_cliprects = 0;
	execbuf.DR1 = 0;
	execbuf.DR4 = 0;
	execbuf.flags = ring;
	i915_execbuffer2_set_context_id(execbuf, 0);
	execbuf.rsvd2 = 0;

	for (count = 1; count <= 1<<17; count <<= 1) {
		struct timeval start, end;

		gettimeofday(&start, NULL);
		if (gem_exec(fd, &execbuf, count))
			exit(1);
		gem_sync(fd, handle);
		gettimeofday(&end, NULL);
		printf("Time to blt %d bytes x %6d:	%7.3fµs, %s\n",
		       object_size, count,
		       elapsed(&start, &end, count),
		       bytes_per_sec((char *)buf, object_size/elapsed(&start, &end, count)*1e6));
		fflush(stdout);
	}
	gem_close(fd, handle);

	close(fd);
}