igt/gem_exec_store: The simplest batch that does something!

A very simple, the simplest!, batch that can execution on any known
engine that just writes a value into memory.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

tests/Makefile.sources

@@ -38,6 +38,7 @@ TESTS_progs_M = \
 	gem_exec_nop \
 	gem_exec_params \
 	gem_exec_parse \
+	gem_exec_store \
 	gem_exec_suspend \
 	gem_exec_reloc \
 	gem_fenced_exec_thrash \

tests/gem_exec_store.c

@@ -0,0 +1,105 @@
+/*
+ * Copyright © 2009 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.
+ *
+ */
+
+/** @file gem_exec_store.c
+ *
+ * Simplest non-NOOP only batch with verification.
+ */
+
+#include "igt.h"
+#include "igt_gt.h"
+
+static void store_dword(int fd, unsigned ring)
+{
+	const int gen = intel_gen(intel_get_drm_devid(fd));
+	struct drm_i915_gem_exec_object2 obj[2];
+	struct drm_i915_gem_relocation_entry reloc;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	uint32_t batch[16];
+	int i;
+
+	gem_require_ring(fd, ring);
+	igt_skip_on_f(gen == 6 && (ring & ~(3<<13)) == I915_EXEC_BSD,
+		      "MI_STORE_DATA broken on gen6 bsd\n");
+
+	memset(&execbuf, 0, sizeof(execbuf));
+	execbuf.buffers_ptr = (uintptr_t)obj;
+	execbuf.buffer_count = 2;
+	execbuf.flags = ring;
+	if (gen < 6)
+		execbuf.flags |= I915_EXEC_SECURE;
+
+	memset(obj, 0, sizeof(obj));
+	obj[0].handle = gem_create(fd, 4096);
+	obj[1].handle = gem_create(fd, 4096);
+
+	memset(&reloc, 0, sizeof(reloc));
+	reloc.target_handle = obj[0].handle;
+	reloc.presumed_offset = 0;
+	reloc.offset = sizeof(uint32_t);
+	reloc.delta = 0;
+	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;
+
+	i = 0;
+	batch[i] = MI_STORE_DWORD_IMM | (gen < 6 ? 1 << 22 : 0);
+	if (gen >= 8) {
+		batch[++i] = 0;
+		batch[++i] = 0;
+	} else if (gen >= 4) {
+		batch[++i] = 0;
+		batch[++i] = 0;
+		reloc.offset += sizeof(uint32_t);
+	} else {
+		batch[i]--;
+		batch[++i] = 0;
+	}
+	batch[++i] = 0xc0ffee;
+	batch[++i] = MI_BATCH_BUFFER_END;
+	gem_write(fd, obj[1].handle, 0, batch, sizeof(batch));
+	gem_execbuf(fd, &execbuf);
+	gem_close(fd, obj[1].handle);
+
+	gem_read(fd, obj[0].handle, 0, batch, sizeof(batch));
+	gem_close(fd, obj[0].handle);
+	igt_assert_eq(*batch, 0xc0ffee);
+}
+
+igt_main
+{
+	const struct intel_execution_engine *e;
+	int fd;
+
+	igt_fixture
+		fd = drm_open_driver_master(DRIVER_INTEL);
+
+	for (e = intel_execution_engines; e->name; e++)
+		igt_subtest_f("basic-%s", e->name)
+			store_dword(fd, e->exec_id | e->flags);
+
+	igt_fixture
+		close(fd);
+}