[Intel-gfx] [PATCH i-g-t] tests/gem_pwrite_snooped: Verify set_caching vs. pwrite clflush behaviour

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

The test does the following
1. set_domain src GTT
2. set_caching src NONE
3. pwrite src
4. set_caching src CACHED
5. blt src->dst
6. pread dst
7. verify data matches

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 tests/Makefile.sources     |   1 +
 tests/gem_pwrite_snooped.c | 140 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 141 insertions(+)
 create mode 100644 tests/gem_pwrite_snooped.c

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index c94714b..b9a4cb4 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -47,6 +47,7 @@ TESTS_progs_M = \
 	gem_pread_after_blit \
 	gem_pwrite \
 	gem_pwrite_pread \
+	gem_pwrite_snooped \
 	gem_readwrite \
 	gem_read_read_speed \
 	gem_reloc_overflow \
diff --git a/tests/gem_pwrite_snooped.c b/tests/gem_pwrite_snooped.c
new file mode 100644
index 0000000..890c61d
--- /dev/null
+++ b/tests/gem_pwrite_snooped.c
@@ -0,0 +1,140 @@
+/*
+ * Copyright © 2015 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.
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include "drm.h"
+#include "ioctl_wrappers.h"
+#include "intel_chipset.h"
+#include "drmtest.h"
+#include "igt_aux.h"
+
+IGT_TEST_DESCRIPTION(
+   "pwrite to a snooped bo then make it uncached and check that the GPU sees the data.");
+
+static int fd;
+static uint32_t devid;
+static drm_intel_bufmgr *bufmgr;
+
+static void blit(drm_intel_bo *dst, drm_intel_bo *src,
+		 unsigned int width, unsigned int height,
+		 unsigned int dst_pitch, unsigned int src_pitch)
+{
+	struct intel_batchbuffer *batch;
+
+	batch = intel_batchbuffer_alloc(bufmgr, devid);
+	igt_assert(batch);
+
+	BLIT_COPY_BATCH_START(0);
+	OUT_BATCH((3 << 24) | /* 32 bits */
+		  (0xcc << 16) | /* copy ROP */
+		  dst_pitch);
+	OUT_BATCH(0 << 16 | 0);
+	OUT_BATCH(height << 16 | width);
+	OUT_RELOC_FENCED(dst, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
+	OUT_BATCH(0 << 16 | 0);
+	OUT_BATCH(src_pitch);
+	OUT_RELOC_FENCED(src, I915_GEM_DOMAIN_RENDER, 0, 0);
+	ADVANCE_BATCH();
+
+	if (batch->gen >= 6) {
+		BEGIN_BATCH(3, 0);
+		OUT_BATCH(XY_SETUP_CLIP_BLT_CMD);
+		OUT_BATCH(0);
+		OUT_BATCH(0);
+		ADVANCE_BATCH();
+	}
+
+	intel_batchbuffer_flush(batch);
+	intel_batchbuffer_free(batch);
+}
+
+static void *memchr_inv(const void *s, int c, size_t n)
+{
+	const unsigned char *us = s;
+	unsigned char uc = c;
+
+	while (n--) {
+		if (*us != uc)
+			return (void *) us;
+		us++;
+	}
+
+	return NULL;
+}
+
+static void test(int w, int h)
+{
+	int object_size = w * h * 4;
+	drm_intel_bo *src, *dst;
+	void *buf;
+
+	src = drm_intel_bo_alloc(bufmgr, "src", object_size, 4096);
+	igt_assert(src);
+	dst = drm_intel_bo_alloc(bufmgr, "dst", object_size, 4096);
+	igt_assert(dst);
+
+	buf = malloc(object_size);
+	igt_assert(buf);
+	memset(buf, 0xff, object_size);
+
+	gem_set_domain(fd, src->handle, I915_GEM_DOMAIN_GTT,
+		       I915_GEM_DOMAIN_GTT);
+
+	gem_set_caching(fd, src->handle, I915_CACHING_CACHED);
+
+	gem_write(fd, src->handle, 0, buf, object_size);
+
+	gem_set_caching(fd, src->handle, I915_CACHING_NONE);
+
+	blit(dst, src, w, h, w * 4, h * 4);
+
+	memset(buf, 0x00, object_size);
+	gem_read(fd, dst->handle, 0, buf, object_size);
+
+	igt_assert(memchr_inv(buf, 0xff, object_size) == NULL);
+}
+
+igt_simple_main
+{
+	igt_skip_on_simulation();
+
+	fd = drm_open_any();
+	devid = intel_get_drm_devid(fd);
+	bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
+
+	test(256, 256);
+
+	drm_intel_bufmgr_destroy(bufmgr);
+	close(fd);
+}
-- 
2.4.6