tests: add drm_vma_limiter variants that only check gtt/cpu mmaps

Suggested by Chris Wilson.

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

tests/Makefile.am

@@ -57,6 +57,8 @@ TESTS_progs = \
 	gem_unref_active_buffers \
 	gem_reloc_vs_gpu \
 	drm_vma_limiter \
+	drm_vma_limiter_cpu \
+	drm_vma_limiter_gtt \
 	$(NULL)
 
 TESTS_scripts = \

tests/drm_vma_limiter_cpu.c

@@ -0,0 +1,100 @@
+/*
+ * 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>
+ */
+
+#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 "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+#include "intel_bufmgr.h"
+#include "intel_batchbuffer.h"
+#include "intel_gpu_tools.h"
+
+static drm_intel_bufmgr *bufmgr;
+struct intel_batchbuffer *batch;
+
+/* Testcase: check whether the libdrm vma limiter works
+ *
+ * We've had reports of the X server exhausting the default rlimit of 64k vma's
+ * in the kernel. libdrm has grown facilities to limit the vma caching since,
+ * this checks whether they actually work.
+ *
+ * This one checks cpu mmaps only.
+ */
+
+#define BO_ARRAY_SIZE 68000
+drm_intel_bo *bos[BO_ARRAY_SIZE];
+
+int main(int argc, char **argv)
+{
+	int fd;
+	int i;
+	char *ptr;
+
+	fd = drm_open_any();
+
+	bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
+	drm_intel_bufmgr_gem_enable_reuse(bufmgr);
+	batch = intel_batchbuffer_alloc(bufmgr, intel_get_drm_devid(fd));
+
+	drm_intel_bufmgr_gem_set_vma_cache_size(bufmgr, 500);
+
+	for (i = 0; i < BO_ARRAY_SIZE; i++) {
+		bos[i] = drm_intel_bo_alloc(bufmgr, "mmap bo", 4096, 4096);
+		assert(bos[i]);
+
+		drm_intel_bo_map(bos[i], 1);
+		ptr = bos[i]->virtual;
+		assert(ptr);
+		*ptr = 'c';
+		drm_intel_bo_unmap(bos[i]);
+	}
+
+	/* and recheck whether a second map of the same still works */
+	for (i = 0; i < BO_ARRAY_SIZE; i++) {
+		bos[i] = drm_intel_bo_alloc(bufmgr, "mmap bo", 4096, 4096);
+		assert(bos[i]);
+
+		drm_intel_bo_map(bos[i], 1);
+		ptr = bos[i]->virtual;
+		assert(*ptr = 'c');
+		drm_intel_bo_unmap(bos[i]);
+	}
+
+	intel_batchbuffer_free(batch);
+	drm_intel_bufmgr_destroy(bufmgr);
+
+	close(fd);
+
+	return 0;
+}

tests/drm_vma_limiter_gtt.c

@@ -0,0 +1,101 @@
+/*
+ * 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>
+ */
+
+#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 "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+#include "intel_bufmgr.h"
+#include "intel_batchbuffer.h"
+#include "intel_gpu_tools.h"
+
+static drm_intel_bufmgr *bufmgr;
+struct intel_batchbuffer *batch;
+
+/* Testcase: check whether the libdrm vma limiter works
+ *
+ * We've had reports of the X server exhausting the default rlimit of 64k vma's
+ * in the kernel. libdrm has grown facilities to limit the vma caching since,
+ * this checks whether they actually work.
+ *
+ * This one checks cpu mmaps only.
+ */
+
+/* we do both cpu and gtt maps, so only need half of 64k to exhaust */
+#define BO_ARRAY_SIZE 68000
+drm_intel_bo *bos[BO_ARRAY_SIZE];
+
+int main(int argc, char **argv)
+{
+	int fd;
+	int i;
+	char *ptr;
+
+	fd = drm_open_any();
+
+	bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
+	drm_intel_bufmgr_gem_enable_reuse(bufmgr);
+	batch = intel_batchbuffer_alloc(bufmgr, intel_get_drm_devid(fd));
+
+	drm_intel_bufmgr_gem_set_vma_cache_size(bufmgr, 500);
+
+	for (i = 0; i < BO_ARRAY_SIZE; i++) {
+		bos[i] = drm_intel_bo_alloc(bufmgr, "mmap bo", 4096, 4096);
+		assert(bos[i]);
+
+		drm_intel_gem_bo_map_gtt(bos[i]);
+		ptr = bos[i]->virtual;
+		assert(ptr);
+		*ptr = 'c';
+		drm_intel_gem_bo_unmap_gtt(bos[i]);
+	}
+
+	/* and recheck whether a second map of the same still works */
+	for (i = 0; i < BO_ARRAY_SIZE; i++) {
+		bos[i] = drm_intel_bo_alloc(bufmgr, "mmap bo", 4096, 4096);
+		assert(bos[i]);
+
+		drm_intel_gem_bo_map_gtt(bos[i]);
+		ptr = bos[i]->virtual;
+		assert(*ptr = 'c');
+		drm_intel_gem_bo_unmap_gtt(bos[i]);
+	}
+
+	intel_batchbuffer_free(batch);
+	drm_intel_bufmgr_destroy(bufmgr);
+
+	close(fd);
+
+	return 0;
+}