[Intel-gfx] [PATCH igt v3] 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.

v2: Add some negative tests as well

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 tests/gem_exec_parse.c | 119 +++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 116 insertions(+), 3 deletions(-)

diff --git a/tests/gem_exec_parse.c b/tests/gem_exec_parse.c
index aa4ea67..8fb9580 100644
--- a/tests/gem_exec_parse.c
+++ b/tests/gem_exec_parse.c
@@ -30,11 +30,123 @@
 
 #include <drm.h>
 
-
 #ifndef I915_PARAM_CMD_PARSER_VERSION
 #define I915_PARAM_CMD_PARSER_VERSION       28
 #endif
 
+#define OACONTROL 0x2360
+#define DERRMR 0x44050
+
+static int command_parser_version(int fd)
+{
+	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(int fd)
+{
+	uint32_t buf[16] = {
+		MI_LOAD_REGISTER_IMM | (5 - 2),
+		HSW_CS_GPR0,
+		0xabcdabcd,
+		HSW_CS_GPR1,
+		0xdeadbeef,
+
+		MI_STORE_REGISTER_MEM | (3 - 2),
+		HSW_CS_GPR1,
+		0, /* address0 */
+
+		MI_LOAD_REGISTER_REG | (3 - 2),
+		HSW_CS_GPR0,
+		HSW_CS_GPR1,
+
+		MI_STORE_REGISTER_MEM | (3 - 2),
+		HSW_CS_GPR1,
+		4, /* address1 */
+
+		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[2];
+
+	igt_require(IS_HASWELL(intel_get_drm_devid(fd)));
+	igt_require(command_parser_version(fd) >= 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[0].offset = 7*sizeof(uint32_t);
+	reloc[0].target_handle = obj[0].handle;
+	reloc[0].delta = 0;
+	reloc[0].read_domains = I915_GEM_DOMAIN_INSTRUCTION;
+	reloc[0].write_domain = I915_GEM_DOMAIN_INSTRUCTION;
+	reloc[1].offset = 13*sizeof(uint32_t);
+	reloc[1].target_handle = obj[0].handle;
+	reloc[1].delta = sizeof(uint32_t);
+	reloc[1].read_domains = I915_GEM_DOMAIN_INSTRUCTION;
+	reloc[1].write_domain = I915_GEM_DOMAIN_INSTRUCTION;
+	obj[1].relocs_ptr = (uintptr_t)&reloc;
+	obj[1].relocation_count = 2;
+
+	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, 2*sizeof(buf[0]));
+	gem_close(fd, obj[0].handle);
+
+	igt_assert_eq_u32(buf[0], 0xdeadbeef); /* before copy */
+	igt_assert_eq_u32(buf[1], 0xabcdabcd); /* after copy */
+
+	/* Now a couple of negative tests that should be filtered */
+	obj[0].handle = gem_create(fd, 4096);
+	execbuf.buffer_count = 1;
+	execbuf.batch_len = 4*sizeof(buf[0]);
+
+	buf[0] = MI_LOAD_REGISTER_REG | (3 - 2);
+	buf[1] = HSW_CS_GPR0;
+	buf[2] = 0;
+	buf[3] = MI_BATCH_BUFFER_END;
+	gem_write(fd, obj[0].handle, 0, buf, execbuf.batch_len);
+	igt_assert_eq(__gem_execbuf(fd, &execbuf), -EINVAL);
+
+	buf[2] = OACONTROL; /* filtered */
+	gem_write(fd, obj[0].handle, 0, buf, execbuf.batch_len);
+	igt_assert_eq(__gem_execbuf(fd, &execbuf), -EINVAL);
+
+	buf[2] = DERRMR; /* master only */
+	gem_write(fd, obj[0].handle, 0, buf, execbuf.batch_len);
+	igt_assert_eq(__gem_execbuf(fd, &execbuf), -EINVAL);
+
+	buf[2] = 0x2038; /* RING_START: invalid */
+	gem_write(fd, obj[0].handle, 0, buf, execbuf.batch_len);
+	igt_assert_eq(__gem_execbuf(fd, &execbuf), -EINVAL);
+
+	gem_close(fd, obj[0].handle);
+}
+
 static void exec_batch_patched(int fd, uint32_t cmd_bo, uint32_t *cmds,
 			       int size, int patch_offset, uint64_t expected_value)
 {
@@ -315,8 +427,6 @@ int fd;
 #define   PIPE_CONTROL_QW_WRITE	(1<<14)
 #define   PIPE_CONTROL_LRI_POST_OP (1<<23)
 
-#define OACONTROL 0x2360
-
 igt_main
 {
 	igt_fixture {
@@ -507,6 +617,9 @@ igt_main
 				   0x12000000);
 	}
 
+	igt_subtest("load-register-reg")
+		hsw_load_register_reg(fd);
+
 	igt_fixture {
 		gem_close(fd, handle);
 
-- 
2.8.1