From: Mika Kuoppala <mika.kuoppala at intel.com>
This catches parallel access to bo->virtual causing sigbus
Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
---
tests/Makefile.am | 1 +
tests/drm_threaded_access_tiled.c | 123 +++++++++++++++++++++++++++++++++++++
2 files changed, 124 insertions(+)
create mode 100644 tests/drm_threaded_access_tiled.c
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 956a724..6811290 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -71,6 +71,7 @@ TESTS_progs = \
drm_vma_limiter_cpu \
drm_vma_limiter_gtt \
drm_vma_limiter_cached \
+ drm_threaded_access_tiled \
sysfs_rc6_residency \
sysfs_rps \
flip_test \
diff --git a/tests/drm_threaded_access_tiled.c b/tests/drm_threaded_access_tiled.c
new file mode 100644
index 0000000..362cf3a
--- /dev/null
+++ b/tests/drm_threaded_access_tiled.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2012 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:
+ * Mika Kuoppala <mika.kuoppala at intel.com>
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <pthread.h>
+
+#include "drmtest.h"
+#include "i915_drm.h"
+#include "intel_bufmgr.h"
+
+/* Testcase: check parallel access to tiled memory
+ *
+ * Parallel access to tiled memory caused sigbus
+ */
+
+#define NUM_THREADS 2
+#define WIDTH 4096
+#define HEIGHT 4096
+
+struct thread_ctx {
+ drm_intel_bo *bo;
+};
+
+static drm_intel_bufmgr *bufmgr;
+static struct thread_ctx tctx[NUM_THREADS];
+
+static void *copy_fn(void *p)
+{
+ unsigned char *buf;
+ struct thread_ctx *c = p;
+
+ buf = malloc(WIDTH * HEIGHT);
+ if (buf == NULL)
+ return (void *)1;
+
+ memcpy(buf, c->bo->virtual, WIDTH * HEIGHT);
+
+ free(buf);
+ return (void *)0;
+}
+
+static int copy_tile_threaded(drm_intel_bo *bo)
+{
+ int i;
+ int r;
+ pthread_t thr[NUM_THREADS];
+ void *status;
+
+ for (i = 0; i < NUM_THREADS; i++) {
+ tctx[i].bo = bo;
+ r = pthread_create(&thr[i], NULL, copy_fn, (void *)&tctx[i]);
+ assert(r == 0);
+ }
+
+ for (i = 0; i < NUM_THREADS; i++) {
+ pthread_join(thr[i], &status);
+ assert(status == 0);
+ }
+
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ int fd;
+ drm_intel_bo *bo;
+ uint32_t tiling_mode = I915_TILING_Y;
+ unsigned long pitch = 0;
+ int r;
+
+ fd = drm_open_any();
+ assert(fd >= 0);
+
+ bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
+ assert(bufmgr);
+
+ bo = drm_intel_bo_alloc_tiled(bufmgr, "mmap bo", WIDTH, HEIGHT, 1,
+ &tiling_mode, &pitch, 0);
+ assert(bo);
+
+ r = drm_intel_gem_bo_map_gtt(bo);
+ assert(!r);
+
+ r = copy_tile_threaded(bo);
+ assert(!r);
+
+ r = drm_intel_gem_bo_unmap_gtt(bo);
+ assert(!r);
+
+ drm_intel_bo_unreference(bo);
+ drm_intel_bufmgr_destroy(bufmgr);
+
+ close(fd);
+
+ return 0;
+}
--
1.7.9.5
