tests: add gem_tiled_swapping

Also add a drmtest_exchange_int helper, might come handy at other
places.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

lib/drmtest.c

@@ -333,6 +333,16 @@ void drmtest_stop_signal_helper(void)
 }
 
 /* other helpers */
+void drmtest_exchange_int(void *array, unsigned i, unsigned j)
+{
+	int *int_arr, tmp;
+	int_arr = array;
+
+	tmp = int_arr[i];
+	int_arr[i] = int_arr[j];
+	int_arr[j] = tmp;
+}
+
 void drmtest_permute_array(void *array, unsigned size,
 			   void (*exchange_func)(void *array,
 						 unsigned i,

lib/drmtest.h

@@ -55,6 +55,7 @@ uint64_t gem_mappable_aperture_size(void);
 /* generally useful helpers */
 void drmtest_fork_signal_helper(void);
 void drmtest_stop_signal_helper(void);
+void drmtest_exchange_int(void *array, unsigned i, unsigned j);
 void drmtest_permute_array(void *array, unsigned size,
 			   void (*exchange_func)(void *array,
 						 unsigned i,

tests/.gitignore

@@ -41,6 +41,7 @@ gem_tiled_blits
 gem_tiled_fence_blits
 gem_tiled_pread
 gem_tiled_pread_pwrite
+gem_tiled_swapping
 gem_unref_active_buffers
 gem_vmap_blits
 gen3_mixed_blits

tests/Makefile.am

@@ -22,6 +22,7 @@ TESTS_progs = \
 	gem_pread_after_blit \
 	gem_tiled_pread \
 	gem_tiled_pread_pwrite \
+	gem_tiled_swapping \
 	gem_partial_pwrite_pread \
 	gem_linear_blits \
 	gem_vmap_blits \

tests/gem_tiled_swapping.c

@@ -0,0 +1,140 @@
+/*
+ * 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:
+ *    Daniel Vetter <daniel.vetter@ffwll.ch>
+ *
+ */
+
+/** @file gem_tiled_pread_pwrite.c
+ *
+ * This is a test of pread's behavior on tiled objects with respect to the
+ * reported swizzling value.
+ *
+ * The goal is to exercise the slow_bit17_copy path for reading on bit17
+ * machines, but will also be useful for catching swizzling value bugs on
+ * other systems.
+ */
+
+/*
+ * Testcase: Exercise swizzle code for swapping
+ *
+ * The swizzle checks in the swapin path are at a different place than the ones
+ * for pread/pwrite, so we need to check them separately.
+ *
+ * This test obviously needs swap present (and exits if none is detected).
+ */
+
+#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 WIDTH 512
+#define HEIGHT 512
+static uint32_t linear[WIDTH * HEIGHT];
+static uint32_t current_tiling_mode;
+
+#define PAGE_SIZE 4096
+
+static uint32_t
+create_bo_and_fill(int fd)
+{
+	uint32_t handle;
+	uint32_t *data;
+	int i;
+
+	handle = gem_create(fd, sizeof(linear));
+	gem_set_tiling(fd, handle, current_tiling_mode, WIDTH * sizeof(uint32_t));
+
+	/* Fill the BO with dwords starting at start_val */
+	data = gem_mmap(fd, handle, sizeof(linear), PROT_READ | PROT_WRITE);
+	for (i = 0; i < WIDTH*HEIGHT; i++)
+		data[i] = i;
+	munmap(data, sizeof(linear));
+
+	return handle;
+}
+
+uint32_t *bo_handles;
+int *idx_arr;
+
+int
+main(int argc, char **argv)
+{
+	int fd;
+	uint32_t *data;
+	int i, j;
+	int count;
+	current_tiling_mode = I915_TILING_X;
+
+	fd = drm_open_any();
+	/* need slightly more than total ram */
+	count = intel_get_total_ram_mb() * 11 / 10;
+	bo_handles = calloc(count, sizeof(uint32_t));
+	assert(bo_handles);
+
+	idx_arr = calloc(count, sizeof(int));
+	assert(idx_arr);
+
+	if (intel_get_total_swap_mb() == 0) {
+		printf("no swap detected\n");
+		return 77;
+	}
+
+	for (i = 0; i < count; i++)
+		bo_handles[i] = create_bo_and_fill(fd);
+
+	for (i = 0; i < count; i++)
+		idx_arr[i] = i;
+
+	drmtest_permute_array(idx_arr, count,
+			      drmtest_exchange_int);
+
+	for (i = 0; i < count/2; i++) {
+		/* Check the target bo's contents. */
+		data = gem_mmap(fd, bo_handles[idx_arr[i]],
+				sizeof(linear), PROT_READ | PROT_WRITE);
+		for (j = 0; j < WIDTH*HEIGHT; j++)
+			if (data[j] != j) {
+				fprintf(stderr, "mismatch at %i: %i\n",
+						j, data[j]);
+				exit(1);
+			}
+		munmap(data, sizeof(linear));
+	}
+
+	close(fd);
+
+	return 0;
+}