static void
copy(int fd, uint32_t dst, uint32_t src)
{
	uint32_t batch[1024], *b = batch;
	struct drm_i915_gem_relocation_entry reloc[2], *r = reloc;
	struct drm_i915_gem_exec_object2 obj[3];
	struct drm_i915_gem_execbuffer2 exec;
	uint32_t handle;
	int ret;

	/* invariant state */
	*b++ = (_3DSTATE_AA_CMD |
		AA_LINE_ECAAR_WIDTH_ENABLE |
		AA_LINE_ECAAR_WIDTH_1_0 |
		AA_LINE_REGION_WIDTH_ENABLE | AA_LINE_REGION_WIDTH_1_0);
	*b++ = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
		IAB_MODIFY_ENABLE |
		IAB_MODIFY_FUNC | (BLENDFUNC_ADD << IAB_FUNC_SHIFT) |
		IAB_MODIFY_SRC_FACTOR | (BLENDFACT_ONE <<
					 IAB_SRC_FACTOR_SHIFT) |
		IAB_MODIFY_DST_FACTOR | (BLENDFACT_ZERO <<
					 IAB_DST_FACTOR_SHIFT));
	*b++ = (_3DSTATE_DFLT_DIFFUSE_CMD);
	*b++ = (0);
	*b++ = (_3DSTATE_DFLT_SPEC_CMD);
	*b++ = (0);
	*b++ = (_3DSTATE_DFLT_Z_CMD);
	*b++ = (0);
	*b++ = (_3DSTATE_COORD_SET_BINDINGS |
		CSB_TCB(0, 0) |
		CSB_TCB(1, 1) |
		CSB_TCB(2, 2) |
		CSB_TCB(3, 3) |
		CSB_TCB(4, 4) |
		CSB_TCB(5, 5) | CSB_TCB(6, 6) | CSB_TCB(7, 7));
	*b++ = (_3DSTATE_RASTER_RULES_CMD |
		ENABLE_POINT_RASTER_RULE |
		OGL_POINT_RASTER_RULE |
		ENABLE_LINE_STRIP_PROVOKE_VRTX |
		ENABLE_TRI_FAN_PROVOKE_VRTX |
		LINE_STRIP_PROVOKE_VRTX(1) |
		TRI_FAN_PROVOKE_VRTX(2) | ENABLE_TEXKILL_3D_4D | TEXKILL_4D);
	*b++ = (_3DSTATE_MODES_4_CMD |
		ENABLE_LOGIC_OP_FUNC | LOGIC_OP_FUNC(LOGICOP_COPY) |
		ENABLE_STENCIL_WRITE_MASK | STENCIL_WRITE_MASK(0xff) |
		ENABLE_STENCIL_TEST_MASK | STENCIL_TEST_MASK(0xff));
	*b++ = (_3DSTATE_LOAD_STATE_IMMEDIATE_1 | I1_LOAD_S(3) | I1_LOAD_S(4) | I1_LOAD_S(5) | 2);
	*b++ = (0x00000000);	/* Disable texture coordinate wrap-shortest */
	*b++ = ((1 << S4_POINT_WIDTH_SHIFT) |
		S4_LINE_WIDTH_ONE |
		S4_CULLMODE_NONE |
		S4_VFMT_XY);
	*b++ = (0x00000000);	/* Stencil. */
	*b++ = (_3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT);
	*b++ = (_3DSTATE_SCISSOR_RECT_0_CMD);
	*b++ = (0);
	*b++ = (0);
	*b++ = (_3DSTATE_DEPTH_SUBRECT_DISABLE);
	*b++ = (_3DSTATE_LOAD_INDIRECT | 0);	/* disable indirect state */
	*b++ = (0);
	*b++ = (_3DSTATE_STIPPLE);
	*b++ = (0x00000000);
	*b++ = (_3DSTATE_BACKFACE_STENCIL_OPS | BFO_ENABLE_STENCIL_TWO_SIDE | 0);

	/* samler state */
#define TEX_COUNT 1
	*b++ = (_3DSTATE_MAP_STATE | (3 * TEX_COUNT));
	*b++ = ((1 << TEX_COUNT) - 1);
	*b = fill_reloc(r++, b-batch, src, I915_GEM_DOMAIN_SAMPLER, 0); b++;
	*b++ = (MAPSURF_32BIT | MT_32BIT_ARGB8888 |
		MS3_TILED_SURFACE |
		(HEIGHT - 1) << MS3_HEIGHT_SHIFT |
		(WIDTH - 1) << MS3_WIDTH_SHIFT);
	*b++ = ((WIDTH-1) << MS4_PITCH_SHIFT);

	*b++ = (_3DSTATE_SAMPLER_STATE | (3 * TEX_COUNT));
	*b++ = ((1 << TEX_COUNT) - 1);
	*b++ = (MIPFILTER_NONE << SS2_MIP_FILTER_SHIFT |
		FILTER_NEAREST << SS2_MAG_FILTER_SHIFT |
		FILTER_NEAREST << SS2_MIN_FILTER_SHIFT);
	*b++ = (TEXCOORDMODE_WRAP << SS3_TCX_ADDR_MODE_SHIFT |
		TEXCOORDMODE_WRAP << SS3_TCY_ADDR_MODE_SHIFT |
		0 << SS3_TEXTUREMAP_INDEX_SHIFT);
	*b++ = (0x00000000);

	/* render target state */
	*b++ = (_3DSTATE_BUF_INFO_CMD);
	*b++ = (BUF_3D_ID_COLOR_BACK | BUF_3D_TILED_SURFACE |  WIDTH*4);
	*b = fill_reloc(r++, b-batch, dst,
			I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER);
	b++;

	*b++ = (_3DSTATE_DST_BUF_VARS_CMD);
	*b++ = (COLR_BUF_ARGB8888 |
		DSTORG_HORT_BIAS(0x8) |
		DSTORG_VERT_BIAS(0x8));

	/* draw rect is unconditional */
	*b++ = (_3DSTATE_DRAW_RECT_CMD);
	*b++ = (0x00000000);
	*b++ = (0x00000000);	/* ymin, xmin */
	*b++ = (DRAW_YMAX(HEIGHT - 1) |
		DRAW_XMAX(WIDTH - 1));
	/* yorig, xorig (relate to color buffer?) */
	*b++ = (0x00000000);

	/* texfmt */
	*b++ = (_3DSTATE_LOAD_STATE_IMMEDIATE_1 | I1_LOAD_S(1) | I1_LOAD_S(2) | I1_LOAD_S(6) | 2);
	*b++ = ((4 << S1_VERTEX_WIDTH_SHIFT) | (4 << S1_VERTEX_PITCH_SHIFT));
	*b++ = (~S2_TEXCOORD_FMT(0, TEXCOORDFMT_NOT_PRESENT) |
		S2_TEXCOORD_FMT(0, TEXCOORDFMT_2D));
	*b++ = (S6_CBUF_BLEND_ENABLE | S6_COLOR_WRITE_ENABLE |
		BLENDFUNC_ADD << S6_CBUF_BLEND_FUNC_SHIFT |
		BLENDFACT_ONE << S6_CBUF_SRC_BLEND_FACT_SHIFT |
		BLENDFACT_ZERO << S6_CBUF_DST_BLEND_FACT_SHIFT);

	/* pixel shader */
	*b++ = (_3DSTATE_PIXEL_SHADER_PROGRAM | (1 + 3*3 - 2));
	/* decl FS_T0 */
	*b++ = (D0_DCL |
		REG_TYPE(FS_T0) << D0_TYPE_SHIFT |
		REG_NR(FS_T0) << D0_NR_SHIFT |
		((REG_TYPE(FS_T0) != REG_TYPE_S) ? D0_CHANNEL_ALL : 0));
	*b++ = (0);
	*b++ = (0);
	/* decl FS_S0 */
	*b++ = (D0_DCL |
		(REG_TYPE(FS_S0) << D0_TYPE_SHIFT) |
		(REG_NR(FS_S0) << D0_NR_SHIFT) |
		((REG_TYPE(FS_S0) != REG_TYPE_S) ? D0_CHANNEL_ALL : 0));
	*b++ = (0);
	*b++ = (0);
	/* texld(FS_OC, FS_S0, FS_T0 */
	*b++ = (T0_TEXLD |
		(REG_TYPE(FS_OC) << T0_DEST_TYPE_SHIFT) |
		(REG_NR(FS_OC) << T0_DEST_NR_SHIFT) |
		(REG_NR(FS_S0) << T0_SAMPLER_NR_SHIFT));
	*b++ = ((REG_TYPE(FS_T0) << T1_ADDRESS_REG_TYPE_SHIFT) |
		(REG_NR(FS_T0) << T1_ADDRESS_REG_NR_SHIFT));
	*b++ = (0);

	*b++ = (PRIM3D_RECTLIST | (3*4 - 1));
	*b++ = pack_float(WIDTH);
	*b++ = pack_float(HEIGHT);
	*b++ = pack_float(WIDTH);
	*b++ = pack_float(HEIGHT);

	*b++ = pack_float(0);
	*b++ = pack_float(HEIGHT);
	*b++ = pack_float(0);
	*b++ = pack_float(HEIGHT);

	*b++ = pack_float(0);
	*b++ = pack_float(0);
	*b++ = pack_float(0);
	*b++ = pack_float(0);

	*b++ = MI_BATCH_BUFFER_END;
	if ((b - batch) & 1)
		*b++ = 0;

	assert(b - batch <= 1024);
	handle = gem_create(fd, 4096);
	gem_write(fd, handle, 0, batch, (b-batch)*sizeof(batch[0]));

	assert(r-reloc == 2);

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

	obj[1].handle = src;
	obj[1].relocation_count = 0;
	obj[1].relocs_ptr = 0;
	obj[1].alignment = 0;
	obj[1].offset = 0;
	obj[1].flags = 0;
	obj[1].rsvd1 = 0;
	obj[1].rsvd2 = 0;

	obj[2].handle = handle;
	obj[2].relocation_count = 2;
	obj[2].relocs_ptr = (uintptr_t)reloc;
	obj[2].alignment = 0;
	obj[2].offset = 0;
	obj[2].flags = 0;
	obj[2].rsvd1 = obj[2].rsvd2 = 0;

	exec.buffers_ptr = (uintptr_t)obj;
	exec.buffer_count = 3;
	exec.batch_start_offset = 0;
	exec.batch_len = (b-batch)*sizeof(batch[0]);
	exec.DR1 = exec.DR4 = 0;
	exec.num_cliprects = 0;
	exec.cliprects_ptr = 0;
	exec.flags = 0;
	i915_execbuffer2_set_context_id(exec, 0);
	exec.rsvd2 = 0;

	ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &exec);
	while (ret && errno == EBUSY) {
		drmCommandNone(fd, DRM_I915_GEM_THROTTLE);
		ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &exec);
	}
	assert(ret == 0);

	gem_close(fd, handle);
}
static int
blit(int fd, uint32_t dst, uint32_t src, uint32_t *all_bo, int n_bo)
{
	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;
	if (intel_gen(intel_get_drm_devid(fd)) >= 8)
		batch[i - 1] |= 8;
	else
		batch[i - 1] |= 6;
	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;
	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;
	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]);
	if (intel_gen(intel_get_drm_devid(fd)) >= 8)
		reloc[1].offset += 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].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;

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

	return ret;
}
static void blt_copy(int fd, uint32_t dst, uint32_t src)
{
	uint32_t batch[1024], *b = batch;
	struct drm_i915_gem_relocation_entry reloc[2], *r = reloc;
	struct drm_i915_gem_exec_object2 obj[3];
	struct drm_i915_gem_execbuffer2 exec;
	uint32_t handle;
	int ret;

	*b++ = (XY_SRC_COPY_BLT_CMD |
		XY_SRC_COPY_BLT_WRITE_ALPHA |
		XY_SRC_COPY_BLT_WRITE_RGB);
	*b++ = 3 << 24 | 0xcc << 16 | WIDTH * 4;
	*b++ = 0;
	*b++ = HEIGHT << 16 | WIDTH;
	*b = fill_reloc(r++, b-batch, dst,
			I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER); b++;
	*b++ = 0;
	*b++ = WIDTH*4;
	*b = fill_reloc(r++, b-batch, src, I915_GEM_DOMAIN_RENDER, 0); b++;

	*b++ = MI_BATCH_BUFFER_END;
	if ((b - batch) & 1)
		*b++ = 0;

	igt_assert(b - batch <= 1024);
	handle = gem_create(fd, 4096);
	gem_write(fd, handle, 0, batch, (b-batch)*sizeof(batch[0]));

	igt_assert(r-reloc == 2);

	obj[0].handle = dst;
	obj[0].relocation_count = 0;
	obj[0].relocs_ptr = 0;
	obj[0].alignment = 0;
	obj[0].offset = 0;
	obj[0].flags = EXEC_OBJECT_NEEDS_FENCE;
	obj[0].rsvd1 = 0;
	obj[0].rsvd2 = 0;

	obj[1].handle = src;
	obj[1].relocation_count = 0;
	obj[1].relocs_ptr = 0;
	obj[1].alignment = 0;
	obj[1].offset = 0;
	obj[1].flags = EXEC_OBJECT_NEEDS_FENCE;
	obj[1].rsvd1 = 0;
	obj[1].rsvd2 = 0;

	obj[2].handle = handle;
	obj[2].relocation_count = 2;
	obj[2].relocs_ptr = (uintptr_t)reloc;
	obj[2].alignment = 0;
	obj[2].offset = 0;
	obj[2].flags = 0;
	obj[2].rsvd1 = obj[2].rsvd2 = 0;

	exec.buffers_ptr = (uintptr_t)obj;
	exec.buffer_count = 3;
	exec.batch_start_offset = 0;
	exec.batch_len = (b-batch)*sizeof(batch[0]);
	exec.DR1 = exec.DR4 = 0;
	exec.num_cliprects = 0;
	exec.cliprects_ptr = 0;
	exec.flags = 0;
	i915_execbuffer2_set_context_id(exec, 0);
	exec.rsvd2 = 0;

	ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &exec);
	while (ret && errno == EBUSY) {
		drmCommandNone(fd, DRM_I915_GEM_THROTTLE);
		ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &exec);
	}
	igt_assert(ret == 0);

	gem_close(fd, handle);
}
static void
copy(int fd, uint32_t dst, uint32_t src, unsigned int error)
{
	uint32_t batch[12];
	struct drm_i915_gem_relocation_entry reloc[2];
	struct drm_i915_gem_exec_object2 obj[3];
	struct drm_i915_gem_execbuffer2 exec;
	uint32_t handle;
	int ret, i=0;

	batch[i++] = XY_SRC_COPY_BLT_CMD |
		  XY_SRC_COPY_BLT_WRITE_ALPHA |
		  XY_SRC_COPY_BLT_WRITE_RGB;
	if (intel_gen(intel_get_drm_devid(fd)) >= 8)
		batch[i - 1] |= 8;
	else
		batch[i - 1] |= 6;

	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;
	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;
	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]);
	if (intel_gen(intel_get_drm_devid(fd)) >= 8)
		reloc[1].offset += sizeof(batch[0]);
	reloc[1].presumed_offset = 0;
	reloc[1].read_domains = I915_GEM_DOMAIN_RENDER;
	reloc[1].write_domain = 0;

	memset(obj, 0, sizeof(obj));
	exec.buffer_count = 0;
	obj[exec.buffer_count++].handle = dst;
	if (src != dst)
		obj[exec.buffer_count++].handle = src;
	obj[exec.buffer_count].handle = handle;
	obj[exec.buffer_count].relocation_count = 2;
	obj[exec.buffer_count].relocs_ptr = (uintptr_t)reloc;
	exec.buffer_count++;
	exec.buffers_ptr = (uintptr_t)obj;

	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;

	if (error == ~0)
		igt_assert_neq(ret, 0);
	else
		igt_assert(ret == error);

	gem_close(fd, 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);
}