igt/gem_mmap_wc: Exercise mmap(wc) interface

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 370 insertions, 0 deletions

diff --git a/tests/gem_mmap_wc.c b/tests/gem_mmap_wc.c
new file mode 100644
index 00000000..87140ff1
--- /dev/null
+++ b/tests/gem_mmap_wc.c
@@ -0,0 +1,370 @@
+/*
+ * Copyright © 2011 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.
+ *
+ * Authors:
+ *    Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ */
+
+#define _GNU_SOURCE
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <pthread.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include "drm.h"
+#include "ioctl_wrappers.h"
+#include "drmtest.h"
+#include "igt_debugfs.h"
+
+static int OBJECT_SIZE = 16*1024*1024;
+
+static void set_domain(int fd, uint32_t handle)
+{
+	gem_set_domain(fd, handle, I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT);
+}
+
+static void *
+mmap_bo(int fd, uint32_t handle)
+{
+	void *ptr;
+
+	ptr = gem_mmap__wc(fd, handle, 0, OBJECT_SIZE, PROT_READ | PROT_WRITE);
+	igt_assert(ptr && ptr != MAP_FAILED);
+
+	return ptr;
+}
+
+static void *
+create_pointer(int fd)
+{
+	uint32_t handle;
+	void *ptr;
+
+	handle = gem_create(fd, OBJECT_SIZE);
+
+	ptr = mmap_bo(fd, handle);
+	set_domain(fd, handle);
+
+	gem_close(fd, handle);
+
+	return ptr;
+}
+
+static void
+test_copy(int fd)
+{
+	void *src, *dst;
+
+	igt_require_mmap_wc(fd);
+
+	/* copy from a fresh src to fresh dst to force pagefault on both */
+	src = create_pointer(fd);
+	dst = create_pointer(fd);
+
+	memcpy(dst, src, OBJECT_SIZE);
+	memcpy(src, dst, OBJECT_SIZE);
+
+	munmap(dst, OBJECT_SIZE);
+	munmap(src, OBJECT_SIZE);
+}
+
+enum test_read_write {
+	READ_BEFORE_WRITE,
+	READ_AFTER_WRITE,
+};
+
+static void
+test_read_write(int fd, enum test_read_write order)
+{
+	uint32_t handle;
+	void *ptr;
+	volatile uint32_t val = 0;
+
+	handle = gem_create(fd, OBJECT_SIZE);
+	set_domain(fd, handle);
+
+	ptr = mmap_bo(fd, handle);
+	igt_assert(ptr != MAP_FAILED);
+
+	if (order == READ_BEFORE_WRITE) {
+		val = *(uint32_t *)ptr;
+		*(uint32_t *)ptr = val;
+	} else {
+		*(uint32_t *)ptr = val;
+		val = *(uint32_t *)ptr;
+	}
+
+	gem_close(fd, handle);
+	munmap(ptr, OBJECT_SIZE);
+}
+
+static void
+test_read_write2(int fd, enum test_read_write order)
+{
+	uint32_t handle;
+	void *r, *w;
+	volatile uint32_t val = 0;
+
+	igt_require_mmap_wc(fd);
+
+	handle = gem_create(fd, OBJECT_SIZE);
+	set_domain(fd, handle);
+
+	r = gem_mmap__wc(fd, handle, 0, OBJECT_SIZE, PROT_READ);
+	igt_assert(r != MAP_FAILED);
+
+	w = gem_mmap__wc(fd, handle, 0, OBJECT_SIZE, PROT_READ | PROT_WRITE);
+	igt_assert(w != MAP_FAILED);
+
+	if (order == READ_BEFORE_WRITE) {
+		val = *(uint32_t *)r;
+		*(uint32_t *)w = val;
+	} else {
+		*(uint32_t *)w = val;
+		val = *(uint32_t *)r;
+	}
+
+	gem_close(fd, handle);
+	munmap(r, OBJECT_SIZE);
+	munmap(w, OBJECT_SIZE);
+}
+
+static void
+test_write(int fd)
+{
+	void *src;
+	uint32_t dst;
+
+	igt_require_mmap_wc(fd);
+
+	/* copy from a fresh src to fresh dst to force pagefault on both */
+	src = create_pointer(fd);
+	dst = gem_create(fd, OBJECT_SIZE);
+
+	gem_write(fd, dst, 0, src, OBJECT_SIZE);
+
+	gem_close(fd, dst);
+	munmap(src, OBJECT_SIZE);
+}
+
+static void
+test_write_gtt(int fd)
+{
+	uint32_t dst;
+	char *dst_gtt;
+	void *src;
+
+	igt_require_mmap_wc(fd);
+
+	dst = gem_create(fd, OBJECT_SIZE);
+	set_domain(fd, dst);
+
+	/* prefault object into gtt */
+	dst_gtt = mmap_bo(fd, dst);
+	memset(dst_gtt, 0, OBJECT_SIZE);
+	munmap(dst_gtt, OBJECT_SIZE);
+
+	src = create_pointer(fd);
+
+	gem_write(fd, dst, 0, src, OBJECT_SIZE);
+
+	gem_close(fd, dst);
+	munmap(src, OBJECT_SIZE);
+}
+
+static void
+test_read(int fd)
+{
+	void *dst;
+	uint32_t src;
+
+	igt_require_mmap_wc(fd);
+
+	/* copy from a fresh src to fresh dst to force pagefault on both */
+	dst = create_pointer(fd);
+	src = gem_create(fd, OBJECT_SIZE);
+
+	gem_read(fd, src, 0, dst, OBJECT_SIZE);
+
+	gem_close(fd, src);
+	munmap(dst, OBJECT_SIZE);
+}
+
+static void
+test_write_cpu_read_wc(int fd)
+{
+	uint32_t handle;
+	uint32_t *src, *dst;
+
+	igt_require_mmap_wc(fd);
+
+	handle = gem_create(fd, OBJECT_SIZE);
+
+	dst = gem_mmap__wc(fd, handle, 0, OBJECT_SIZE, PROT_READ);
+	igt_assert(dst != (uint32_t *)MAP_FAILED);
+
+	src = gem_mmap__cpu(fd, handle, 0, OBJECT_SIZE, PROT_WRITE);
+	igt_assert(src != (uint32_t *)MAP_FAILED);
+
+	gem_close(fd, handle);
+
+	memset(src, 0xaa, OBJECT_SIZE);
+	set_domain(fd, handle);
+	igt_assert(memcmp(dst, src, OBJECT_SIZE) == 0);
+
+	munmap(src, OBJECT_SIZE);
+	munmap(dst, OBJECT_SIZE);
+}
+
+static void
+test_write_gtt_read_wc(int fd)
+{
+	uint32_t handle;
+	uint32_t *src, *dst;
+
+	igt_require_mmap_wc(fd);
+
+	handle = gem_create(fd, OBJECT_SIZE);
+	set_domain(fd, handle);
+
+	dst = gem_mmap__wc(fd, handle, 0, OBJECT_SIZE, PROT_READ);
+	igt_assert(dst != (uint32_t *)MAP_FAILED);
+
+	src = gem_mmap__gtt(fd, handle, OBJECT_SIZE, PROT_WRITE);
+	igt_assert(src != (uint32_t *)MAP_FAILED);
+
+	gem_close(fd, handle);
+
+	memset(src, 0xaa, OBJECT_SIZE);
+	igt_assert(memcmp(dst, src, OBJECT_SIZE) == 0);
+
+	munmap(src, OBJECT_SIZE);
+	munmap(dst, OBJECT_SIZE);
+}
+
+struct thread_fault_concurrent {
+	pthread_t thread;
+	int id;
+	uint32_t **ptr;
+};
+
+static void *
+thread_fault_concurrent(void *closure)
+{
+	struct thread_fault_concurrent *t = closure;
+	uint32_t val = 0;
+	int n;
+
+	for (n = 0; n < 32; n++) {
+		if (n & 1)
+			*t->ptr[(n + t->id) % 32] = val;
+		else
+			val = *t->ptr[(n + t->id) % 32];
+	}
+
+	return NULL;
+}
+
+static void
+test_fault_concurrent(int fd)
+{
+	uint32_t *ptr[32];
+	struct thread_fault_concurrent thread[64];
+	int n;
+
+	igt_require_mmap_wc(fd);
+
+	for (n = 0; n < 32; n++) {
+		ptr[n] = create_pointer(fd);
+	}
+
+	for (n = 0; n < 64; n++) {
+		thread[n].ptr = ptr;
+		thread[n].id = n;
+		pthread_create(&thread[n].thread, NULL, thread_fault_concurrent, &thread[n]);
+	}
+
+	for (n = 0; n < 64; n++)
+		pthread_join(thread[n].thread, NULL);
+
+	for (n = 0; n < 32; n++) {
+		munmap(ptr[n], OBJECT_SIZE);
+	}
+}
+
+static void
+run_without_prefault(int fd,
+			void (*func)(int fd))
+{
+	igt_disable_prefault();
+	func(fd);
+	igt_enable_prefault();
+}
+
+int fd;
+
+igt_main
+{
+	if (igt_run_in_simulation())
+		OBJECT_SIZE = 1 * 1024 * 1024;
+
+	igt_fixture
+		fd = drm_open_any();
+
+	igt_subtest("copy")
+		test_copy(fd);
+	igt_subtest("read")
+		test_read(fd);
+	igt_subtest("write")
+		test_write(fd);
+	igt_subtest("write-gtt")
+		test_write_gtt(fd);
+	igt_subtest("read-write")
+		test_read_write(fd, READ_BEFORE_WRITE);
+	igt_subtest("write-read")
+		test_read_write(fd, READ_AFTER_WRITE);
+	igt_subtest("read-write-distinct")
+		test_read_write2(fd, READ_BEFORE_WRITE);
+	igt_subtest("write-read-distinct")
+		test_read_write2(fd, READ_AFTER_WRITE);
+	igt_subtest("fault-concurrent")
+		test_fault_concurrent(fd);
+	igt_subtest("read-no-prefault")
+		run_without_prefault(fd, test_read);
+	igt_subtest("write-no-prefault")
+		run_without_prefault(fd, test_write);
+	igt_subtest("write-gtt-no-prefault")
+		run_without_prefault(fd, test_write_gtt);
+	igt_subtest("write-cpu-read-wc")
+		test_write_cpu_read_wc(fd);
+	igt_subtest("write-gtt-read-wc")
+		test_write_gtt_read_wc(fd);
+
+	igt_fixture
+		close(fd);
+}