[igt-dev] [PATCH i-g-t v5 4/4] tests/i915/gem_mmap_offset: Add new API test for gem_mmap_offset

["Zbigniew Kempczyński" <zbigniew.kempczynski@intel.com>]

From: Lukasz Kalamarz <lukasz.kalamarz@intel.com>

Few simple tests which tries to create / mmap buffer objects
in system / device memory regions.

Signed-off-by: Lukasz Kalamarz <lukasz.kalamarz@intel.com>
Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Vanshidhar Konda <vanshidhar.r.konda@intel.com>
---
 tests/Makefile.sources       |   3 +
 tests/i915/gem_mmap_offset.c | 163 +++++++++++++++++++++++++++++++++++
 tests/meson.build            |   1 +
 3 files changed, 167 insertions(+)
 create mode 100644 tests/i915/gem_mmap_offset.c

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 27801c89..9c6c3933 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -320,6 +320,9 @@ gem_mmap_SOURCES = i915/gem_mmap.c
 TESTS_progs += gem_mmap_gtt
 gem_mmap_gtt_SOURCES = i915/gem_mmap_gtt.c
 
+TESTS_progs += gem_mmap_offset
+gem_mmap_offset_SOURCES = i915/gem_mmap_offset.c
+
 TESTS_progs += gem_mmap_offset_exhaustion
 gem_mmap_offset_exhaustion_SOURCES = i915/gem_mmap_offset_exhaustion.c
 
diff --git a/tests/i915/gem_mmap_offset.c b/tests/i915/gem_mmap_offset.c
new file mode 100644
index 00000000..a4432f93
--- /dev/null
+++ b/tests/i915/gem_mmap_offset.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright © 2019 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 "igt.h"
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include "drm.h"
+
+IGT_TEST_DESCRIPTION("Basic MMAP_OFFSET IOCTL tests for mem regions\n");
+
+static int mmap_offset_ioctl(int fd, struct local_i915_gem_mmap_offset *arg)
+{
+	int err = 0;
+
+	if (igt_ioctl(fd, LOCAL_IOCTL_I915_GEM_MMAP_OFFSET, arg))
+		err = -errno;
+
+	errno = 0;
+	return err;
+}
+
+static void
+mmap_offset_bad_object(int fd, struct local_i915_query_memory_region_info *regions)
+{
+	const char *region_name;
+	struct local_i915_memory_region_info *mem_region;
+	uint32_t region, obj_size, batch_size, real_handle;
+	uint32_t handles[20];
+
+	for_each_memory_region(regions, mem_region) {
+		int i = 0;
+
+		region = mem_region->id;
+		region_name = memory_region_name(region);
+		if (IS_STOLEN_MEMORY_REGION(region)) {
+			continue;
+		}
+		igt_debug("mmap-offset-bad-object: region name: %s, "
+			  "region: %08x\n", region_name, region);
+
+		batch_size = gem_get_batch_size(fd, region);
+		obj_size = 4 * batch_size;
+		real_handle = gem_create_in_memory_regions(fd, obj_size,
+							   region);
+		handles[i++] = 0xdeadbeef;
+		for (int bit = 0; bit < 16; bit++)
+			handles[i++] = real_handle | (1 << (bit + 16));
+		handles[i] = real_handle + 1;
+
+		for (; i >= 0; i--) {
+			struct local_i915_gem_mmap_offset arg = {
+				.handle = handles[i],
+				.flags = LOCAL_I915_MMAP_OFFSET_WC,
+			};
+
+			igt_debug("Trying MMAP IOCTL with handle %x\n",
+				  handles[i]);
+			igt_assert_eq(mmap_offset_ioctl(fd, &arg),
+				      -ENOENT);
+		}
+
+		gem_close(fd, real_handle);
+	}
+}
+
+static void
+mmap_offset_basic(int fd, struct local_i915_query_memory_region_info *regions)
+{
+	const char *region_name;
+	struct local_i915_memory_region_info *mem_region;
+	uint64_t flags;
+	uint32_t region, handle, obj_size;
+	uint8_t *expected, *buf, *addr;
+
+	for_each_memory_region(regions, mem_region) {
+		region = mem_region->id;
+		region_name = memory_region_name(region);
+		if (IS_STOLEN_MEMORY_REGION(region)) {
+			continue;
+		}
+		igt_debug("mmap-offset-basic: region name: %s, region: %08x\n",
+			  region_name, region);
+
+		obj_size = 4 * gem_get_batch_size(fd, region);
+		handle = gem_create_in_memory_regions(fd, obj_size,
+						      region);
+		flags = LOCAL_I915_MMAP_OFFSET_WC;
+		addr = __gem_mmap_offset(fd, handle, 0, obj_size,
+					 PROT_READ | PROT_WRITE,
+					 flags);
+		igt_assert(addr);
+
+		igt_debug("Testing contents of newly created object.\n");
+		expected = calloc(obj_size, sizeof(*expected));
+		igt_assert_eq(memcmp(addr, expected, obj_size), 0);
+		free(expected);
+
+		igt_debug("Testing coherency of writes and mmap reads.\n");
+		buf = calloc(obj_size, sizeof(*buf));
+		memset(buf + 1024, 0x01, 1024);
+		gem_write(fd, handle, 0, buf, obj_size);
+		igt_assert_eq(memcmp(buf, addr, obj_size), 0);
+
+		igt_debug("Testing that mapping stays after close\n");
+		gem_close(fd, handle);
+		igt_assert_eq(memcmp(buf, addr, obj_size), 0);
+		free(buf);
+
+		igt_debug("Testing unmapping\n");
+		munmap(addr, obj_size);
+	}
+}
+
+igt_main
+{	
+	int fd;
+	struct local_i915_query_memory_region_info *regions;
+
+	igt_fixture {
+		fd = drm_open_driver(DRIVER_INTEL);
+		gem_require_mmap_offset(fd);
+		igt_require(gem_mmap__has_wc(fd));
+
+		regions = gem_query_memory_regions(fd);
+		igt_assert(regions);
+	}
+
+	igt_describe("Verify mapping to invalid gem objects won't be created"
+		     " in different memory regions");
+	igt_subtest_f("mmap-offset-bad-object")
+		mmap_offset_bad_object(fd, regions);
+
+	igt_describe("Check buffer object mapping is coherent with "
+		     "data written by gem_write in all memory regions");
+	igt_subtest_f("mmap-offset-basic")
+		mmap_offset_basic(fd, regions);
+
+	igt_fixture {
+		free(regions);
+		close(fd);
+	}
+}
diff --git a/tests/meson.build b/tests/meson.build
index 755fc9e6..644b5504 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -174,6 +174,7 @@ i915_progs = [
 	'gem_media_vme',
 	'gem_mmap',
 	'gem_mmap_gtt',
+	'gem_mmap_offset',
 	'gem_mmap_offset_exhaustion',
 	'gem_mmap_wc',
 	'gem_partial_pwrite_pread',
-- 
2.23.0

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