[Intel-gfx] [PATCH igt] igt/gem_exec_parse: Simple exercise for MI_LOAD_REGISTER_REG

[Chris Wilson]

Command parser version 7 introduces the ability to copy between
regsiters from the Haswell RCS with MI_LOAD_REGISTER_REG. This provides
a quick smoketest of that ability.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 tests/gem_exec_parse.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)

diff --git a/tests/gem_exec_parse.c b/tests/gem_exec_parse.c
index aa4ea67..deb93e6 100644
--- a/tests/gem_exec_parse.c
+++ b/tests/gem_exec_parse.c
@@ -317,6 +317,79 @@ int fd;
 
 #define OACONTROL 0x2360
 
+static int command_parser_version(void)
+{
+	int version = -1;
+	drm_i915_getparam_t gp;
+
+	gp.param = I915_PARAM_CMD_PARSER_VERSION;
+	gp.value = &version;
+
+	if (drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp) == 0)
+		return version;
+
+	return -1;
+}
+
+#define HSW_CS_GPR(n) (0x2600 + 8*(n))
+#define HSW_CS_GPR0 HSW_CS_GPR(0)
+#define HSW_CS_GPR1 HSW_CS_GPR(1)
+
+#define MI_LOAD_REGISTER_REG (0x2a << 23)
+#define MI_STORE_REGISTER_MEM (0x24 << 23)
+static void hsw_load_register_reg(void)
+{
+	uint32_t buf[16] = {
+		MI_LOAD_REGISTER_IMM | (5 - 2),
+		HSW_CS_GPR0,
+		0xabcdabcd,
+		HSW_CS_GPR1,
+		0xdeadbeef,
+
+		MI_LOAD_REGISTER_REG | (3 - 2),
+		HSW_CS_GPR0,
+		HSW_CS_GPR1,
+
+		MI_STORE_REGISTER_MEM | (3 - 2),
+		HSW_CS_GPR1,
+		0, /* address */
+
+		MI_BATCH_BUFFER_END,
+	};
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 obj[2];
+	struct drm_i915_gem_relocation_entry reloc;
+
+	igt_require(IS_HASWELL(intel_get_drm_devid(fd)));
+	igt_require(command_parser_version() >= 7);
+
+	memset(obj, 0, sizeof(obj));
+	obj[0].handle = gem_create(fd, 4096);
+	obj[1].handle = gem_create(fd, 4096);
+	gem_write(fd, obj[1].handle, 0, buf, sizeof(buf));
+
+	memset(&reloc, 0, sizeof(reloc));
+	reloc.offset = 10*sizeof(uint32_t);
+	reloc.target_handle = obj[0].handle;
+	reloc.read_domains = I915_GEM_DOMAIN_INSTRUCTION;
+	reloc.write_domain = I915_GEM_DOMAIN_INSTRUCTION;
+	obj[1].relocs_ptr = (uintptr_t)&reloc;
+	obj[1].relocation_count = 1;
+
+	memset(&execbuf, 0, sizeof(execbuf));
+	execbuf.buffers_ptr = (uintptr_t)obj;
+	execbuf.buffer_count = 2;
+	execbuf.batch_len = sizeof(buf);
+	execbuf.flags = I915_EXEC_RENDER;
+	gem_execbuf(fd, &execbuf);
+	gem_close(fd, obj[1].handle);
+
+	gem_read(fd, obj[0].handle, 0, buf, sizeof(buf[0]));
+	gem_close(fd, obj[0].handle);
+
+	igt_assert_eq_u32(buf[0], 0xabcdabcd);
+}
+
 igt_main
 {
 	igt_fixture {
@@ -507,6 +580,9 @@ igt_main
 				   0x12000000);
 	}
 
+	igt_subtest("load-register-reg")
+		hsw_load_register_reg();
+
 	igt_fixture {
 		gem_close(fd, handle);
 
-- 
2.8.1