tests: Add gem_madvise

Exercise that calling madvise produces expected results

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

tests/.gitignore

@@ -48,6 +48,7 @@ gem_hangcheck_forcewake
 gem_largeobject
 gem_linear_blits
 gem_lut_handle
+gem_madvise
 gem_media_fill
 gem_mmap
 gem_mmap_gtt

tests/Makefile.sources

@@ -34,6 +34,7 @@ TESTS_progs_M = \
 	gem_flink \
 	gem_flink_race \
 	gem_linear_blits \
+	gem_madvise \
 	gem_mmap \
 	gem_mmap_gtt \
 	gem_partial_pwrite_pread \

tests/gem_madvise.c

@@ -0,0 +1,155 @@
+/*
+ * Copyright © 2014 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:
+ *    Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <setjmp.h>
+#include <signal.h>
+
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+
+#define OBJECT_SIZE (1024*1024)
+
+/* Testcase: checks that the kernel reports EFAULT when trying to use purged bo
+ *
+ */
+
+static jmp_buf jmp;
+
+static void sigtrap(int sig)
+{
+	longjmp(jmp, sig);
+}
+
+static void
+dontneed_before_mmap(void)
+{
+	int fd = drm_open_any();
+	uint32_t handle;
+	char *ptr;
+
+	handle = gem_create(fd, OBJECT_SIZE);
+	gem_madvise(fd, handle, I915_MADV_DONTNEED);
+	ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ | PROT_WRITE);
+	igt_assert(ptr == NULL);
+	igt_assert(errno == EFAULT);
+	close(fd);
+}
+
+static void
+dontneed_after_mmap(void)
+{
+	int fd = drm_open_any();
+	uint32_t handle;
+	char *ptr;
+
+	handle = gem_create(fd, OBJECT_SIZE);
+	ptr = gem_mmap(fd, handle, OBJECT_SIZE, PROT_READ | PROT_WRITE);
+	igt_assert(ptr != NULL);
+	gem_madvise(fd, handle, I915_MADV_DONTNEED);
+	close(fd);
+
+	signal(SIGBUS, sigtrap);
+	switch (setjmp(jmp)) {
+	case SIGBUS:
+		break;
+	case 0:
+		*ptr = 0;
+	default:
+		igt_assert(!"reached");
+		break;
+	}
+	munmap(ptr, OBJECT_SIZE);
+	signal(SIGBUS, SIG_DFL);
+}
+
+static void
+dontneed_before_pwrite(void)
+{
+	int fd = drm_open_any();
+	uint32_t buf[] = { MI_BATCH_BUFFER_END, 0 };
+	struct drm_i915_gem_pwrite gem_pwrite;
+
+	gem_pwrite.handle = gem_create(fd, OBJECT_SIZE);
+	gem_pwrite.offset = 0;
+	gem_pwrite.size = sizeof(buf);
+	gem_pwrite.data_ptr = (uintptr_t)buf;
+	gem_madvise(fd, gem_pwrite.handle, I915_MADV_DONTNEED);
+
+	igt_assert(drmIoctl(fd, DRM_IOCTL_I915_GEM_PWRITE, &gem_pwrite));
+	igt_assert(errno == EFAULT);
+
+	gem_close(fd, gem_pwrite.handle);
+	close(fd);
+}
+
+static void
+dontneed_before_exec(void)
+{
+	int fd = drm_open_any();
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec;
+	uint32_t buf[] = { MI_BATCH_BUFFER_END, 0 };
+
+	memset(&execbuf, 0, sizeof(execbuf));
+	memset(&exec, 0, sizeof(exec));
+
+	exec.handle = gem_create(fd, OBJECT_SIZE);
+	gem_write(fd, exec.handle, 0, buf, sizeof(buf));
+	gem_madvise(fd, exec.handle, I915_MADV_DONTNEED);
+
+	execbuf.buffers_ptr = (uintptr_t)&exec;
+	execbuf.buffer_count = 1;
+	gem_execbuf(fd, &execbuf);
+
+	gem_close(fd, exec.handle);
+	close(fd);
+}
+
+igt_simple_main
+{
+	igt_skip_on_simulation();
+
+	igt_subtest("dontneed-before-mmap")
+		dontneed_before_mmap();
+
+	igt_subtest("dontneed-after-mmap")
+		dontneed_after_mmap();
+
+	igt_subtest("dontneed-before-pwrite")
+		dontneed_before_pwrite();
+
+	igt_subtest("dontneed-before-exec")
+		dontneed_before_exec();
+}