tests: add gem_gtt_cpu_tlb

This catches tlb invalidation issues on my snb mobile gt2+

tests/.gitignore

@@ -25,8 +25,8 @@ gem_fenced_exec_thrash
 gem_fence_thrash
 gem_flink
 gem_gtt_speed
-gem_gtt_speed
 gem_gtt_concurrent_blit
+gem_gtt_cpu_tlb
 gem_hang
 gem_hangcheck_forcewake
 gem_largeobject

tests/Makefile.am

@@ -40,6 +40,7 @@ TESTS_progs = \
 	gem_fence_thrash \
 	gem_fenced_exec_thrash \
 	gem_gtt_speed \
+	gem_gtt_cpu_tlb \
 	gem_cs_prefetch \
 	gen3_render_linear_blits \
 	gen3_render_tiledx_blits \

tests/gem_gtt_cpu_tlb.c

@@ -0,0 +1,108 @@
+/*
+ * 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.
+ *
+ * Authors:
+ *    Daniel Vetter <daniel.vetter@ffwll.ch>
+ *
+ */
+
+/** @file gem_gtt_cpu_tlb.c
+ *
+ * This test checks whether gtt tlbs for cpu access are correctly invalidated.
+ */
+
+#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/time.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+#include "intel_gpu_tools.h"
+
+#define OBJ_SIZE (1024*1024)
+
+#define PAGE_SIZE 4096
+
+static uint32_t
+create_bo(int fd)
+{
+	uint32_t handle;
+	uint32_t *data;
+	int i;
+
+	handle = gem_create(fd, OBJ_SIZE);
+
+	/* Fill the BO with dwords starting at start_val */
+	data = gem_mmap(fd, handle, OBJ_SIZE, PROT_READ | PROT_WRITE);
+	for (i = 0; i < OBJ_SIZE/4; i++)
+		data[i] = i;
+	munmap(data, OBJ_SIZE);
+
+	return handle;
+}
+
+int
+main(int argc, char **argv)
+{
+	int fd;
+	int i;
+	uint32_t handle;
+
+	uint32_t *ptr;
+
+	fd = drm_open_any();
+
+	handle = gem_create(fd, OBJ_SIZE);
+
+	/* touch one page */
+	ptr = gem_mmap(fd, handle, OBJ_SIZE, PROT_READ | PROT_WRITE);
+	*ptr = 0xdeadbeef;
+	munmap(ptr, OBJ_SIZE);
+
+	gem_close(fd, handle);
+
+	/* stirr up the page allocator a bit. */
+	ptr = malloc(OBJ_SIZE);
+	assert(ptr);
+	memset(ptr, 0x1, OBJ_SIZE);
+
+	handle = create_bo(fd);
+
+	/* Read a bunch of random subsets of the data and check that they come
+	 * out right.
+	 */
+	gem_read(fd, handle, 0, ptr, OBJ_SIZE);
+	for (i = 0; i < OBJ_SIZE/4; i++)
+		assert(ptr[i] == i);
+
+	close(fd);
+
+	return 0;
+}