[Intel-gfx] [PATCH 3/5] tests/gem_disable_prefault: add reloc slow path subtest

[Xiong Zhang]

first disable prefault, then put relocate bo in gtt space and exec cmd,
so it will run relocate_object_slow path, finally enable prefault

Signed-off-by: Xiong Zhang <xiong.y.zhang at intel.com>
---
 tests/Makefile.am            |   1 +
 tests/gem_disable_prefault.c | 168 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 169 insertions(+)
 create mode 100644 tests/gem_disable_prefault.c

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 3003aa0..f0804b3 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -106,6 +106,7 @@ TESTS_progs = \
 	gem_reg_read \
 	gem_tiling_max_stride \
 	prime_udl \
+	gem_disable_prefault \
 	$(NULL)
 
 # IMPORTANT: The ZZ_ tests need to be run last!
diff --git a/tests/gem_disable_prefault.c b/tests/gem_disable_prefault.c
new file mode 100644
index 0000000..9e6f0ad
--- /dev/null
+++ b/tests/gem_disable_prefault.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright © 2013 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:
+ *    Xiong Zhang <xiong.y.zhang at intel.com>
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+#include "intel_chipset.h"
+#include "intel_gpu_tools.h"
+
+#define OBJECT_SIZE (16*1024*1024)
+
+static void *
+mmap_bo(int fd, uint32_t handle, int size)
+{
+	void *ptr;
+
+	ptr = gem_mmap(fd, handle, size, PROT_READ | PROT_WRITE);
+	assert(ptr != MAP_FAILED);
+
+	return ptr;
+}
+
+static void gem_exec(int fd, struct drm_i915_gem_execbuffer2 *execbuf)
+{
+	int ret;
+
+	ret = drmIoctl(fd,
+			DRM_IOCTL_I915_GEM_EXECBUFFER2,
+			execbuf);
+	assert(ret == 0);
+}
+
+static void
+test_disable_prefault_reloc(int fd)
+{
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec[3];
+	struct drm_i915_gem_relocation_entry reloc[4];
+	uint32_t buf[20];
+	uint32_t handle, handle_relocs, src, dst;
+	void *gtt_relocs;
+	int len;
+	int ring;
+
+	handle = gem_create(fd, 4096);
+	src = gem_create(fd, OBJECT_SIZE);
+	dst = gem_create(fd, OBJECT_SIZE);
+
+	len = gem_linear_blt(buf, src, dst, OBJECT_SIZE, reloc);
+	gem_write(fd, handle, 0, buf, len);
+
+	exec[0].handle = src;
+	exec[0].relocation_count = 0;
+	exec[0].relocs_ptr = 0;
+	exec[0].alignment = 0;
+	exec[0].offset = 0;
+	exec[0].flags = 0;
+	exec[0].rsvd1 = 0;
+	exec[0].rsvd2 = 0;
+
+	exec[1].handle = dst;
+	exec[1].relocation_count = 0;
+	exec[1].relocs_ptr = 0;
+	exec[1].alignment = 0;
+	exec[1].offset = 0;
+	exec[1].flags = 0;
+	exec[1].rsvd1 = 0;
+	exec[1].rsvd2 = 0;
+
+	handle_relocs = gem_create(fd, 4096);
+	gem_write(fd, handle_relocs, 0, reloc, sizeof(reloc));
+	gtt_relocs = mmap_bo(fd, handle_relocs, 4096);
+
+	exec[2].handle = handle;
+	exec[2].relocation_count = len > 40 ? 4 : 2;
+	/* A newly mmap gtt bo will fault on first access. */
+	exec[2].relocs_ptr = (uintptr_t)gtt_relocs;
+	exec[2].alignment = 0;
+	exec[2].offset = 0;
+	exec[2].flags = 0;
+	exec[2].rsvd1 = 0;
+	exec[2].rsvd2 = 0;
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_BLT;
+
+	execbuf.buffers_ptr = (uintptr_t)exec;
+	execbuf.buffer_count = 3;
+	execbuf.batch_start_offset = 0;
+	execbuf.batch_len = len;
+	execbuf.cliprects_ptr = 0;
+	execbuf.num_cliprects = 0;
+	execbuf.DR1 = 0;
+	execbuf.DR4 = 0;
+	execbuf.flags = ring;
+	i915_execbuffer2_set_context_id(execbuf, 0);
+	execbuf.rsvd2 = 0;
+
+	drmtest_disable_prefault();
+	gem_exec(fd, &execbuf);
+	gem_sync(fd, handle);
+	drmtest_enable_prefault();
+
+	munmap(gtt_relocs, 4096);
+	gem_close(fd, handle_relocs);
+	gem_close(fd, dst);
+	gem_close(fd, src);
+	gem_close(fd, handle);
+}
+
+int main(int argc, char **argv)
+{
+	int fd;
+
+	/* if user isn't root or kernel doesn't supply
+	 * /sys/module/i915/parameters/prefault_disable,
+	 *  program exit immediately. */
+	if (drmtest_enable_prefault() < 0)
+		return 0;
+
+	drmtest_subtest_init(argc, argv);
+
+	fd = drm_open_any();
+
+	if (drmtest_run_subtest("reloc"))
+		test_disable_prefault_reloc(fd);
+
+	close(fd);
+
+	return 0;
+}
+
-- 
1.8.3.2