first disable prefault, then put relocate bo in gtt space and exec cmd,
so it will run relocate_object_slow path, finally enable prefault
Signed-off-by: Xiong Zhang <xiong.y.zhang@xxxxxxxxx>
---
tests/Makefile.am | 1 +
tests/gem_disable_prefault.c | 168 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 169 insertions(+)
create mode 100644 tests/gem_disable_prefault.c
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 3003aa0..f0804b3 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -106,6 +106,7 @@ TESTS_progs = \
gem_reg_read \
gem_tiling_max_stride \
prime_udl \
+ gem_disable_prefault \
$(NULL)
# IMPORTANT: The ZZ_ tests need to be run last!
diff --git a/tests/gem_disable_prefault.c b/tests/gem_disable_prefault.c
new file mode 100644
index 0000000..9e6f0ad
--- /dev/null
+++ b/tests/gem_disable_prefault.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright © 2013 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:
+ * Xiong Zhang <xiong.y.zhang@xxxxxxxxx>
+ *
+ */
+
+#include <unistd.h>
+#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/ioctl.h>
+#include <sys/mman.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+#include "intel_chipset.h"
+#include "intel_gpu_tools.h"
+
+#define OBJECT_SIZE (16*1024*1024)
+
+static void *
+mmap_bo(int fd, uint32_t handle, int size)
+{
+ void *ptr;
+
+ ptr = gem_mmap(fd, handle, size, PROT_READ | PROT_WRITE);
+ assert(ptr != MAP_FAILED);
+
+ return ptr;
+}
+
+static void gem_exec(int fd, struct drm_i915_gem_execbuffer2 *execbuf)
+{
+ int ret;
+
+ ret = drmIoctl(fd,
+ DRM_IOCTL_I915_GEM_EXECBUFFER2,
+ execbuf);
+ assert(ret == 0);
+}
+
+static void
+test_disable_prefault_reloc(int fd)
+{
+ struct drm_i915_gem_execbuffer2 execbuf;
+ struct drm_i915_gem_exec_object2 exec[3];
+ struct drm_i915_gem_relocation_entry reloc[4];
+ uint32_t buf[20];
+ uint32_t handle, handle_relocs, src, dst;
+ void *gtt_relocs;
+ int len;
+ int ring;
+
+ handle = gem_create(fd, 4096);
+ src = gem_create(fd, OBJECT_SIZE);
+ dst = gem_create(fd, OBJECT_SIZE);
+
+ len = gem_linear_blt(buf, src, dst, OBJECT_SIZE, reloc);
+ gem_write(fd, handle, 0, buf, len);
+
+ exec[0].handle = src;
+ exec[0].relocation_count = 0;
+ exec[0].relocs_ptr = 0;
+ exec[0].alignment = 0;
+ exec[0].offset = 0;
+ exec[0].flags = 0;
+ exec[0].rsvd1 = 0;
+ exec[0].rsvd2 = 0;
+
+ exec[1].handle = dst;
+ exec[1].relocation_count = 0;
+ exec[1].relocs_ptr = 0;
+ exec[1].alignment = 0;
+ exec[1].offset = 0;
+ exec[1].flags = 0;
+ exec[1].rsvd1 = 0;
+ exec[1].rsvd2 = 0;
+
+ handle_relocs = gem_create(fd, 4096);
+ gem_write(fd, handle_relocs, 0, reloc, sizeof(reloc));
+ gtt_relocs = mmap_bo(fd, handle_relocs, 4096);
+
+ exec[2].handle = handle;
+ exec[2].relocation_count = len > 40 ? 4 : 2;
+ /* A newly mmap gtt bo will fault on first access. */
+ exec[2].relocs_ptr = (uintptr_t)gtt_relocs;
+ exec[2].alignment = 0;
+ exec[2].offset = 0;
+ exec[2].flags = 0;
+ exec[2].rsvd1 = 0;
+ exec[2].rsvd2 = 0;
+
+ ring = 0;
+ if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+ ring = I915_EXEC_BLT;
+
+ execbuf.buffers_ptr = (uintptr_t)exec;
+ execbuf.buffer_count = 3;
+ execbuf.batch_start_offset = 0;
+ execbuf.batch_len = len;
+ execbuf.cliprects_ptr = 0;
+ execbuf.num_cliprects = 0;
+ execbuf.DR1 = 0;
+ execbuf.DR4 = 0;
+ execbuf.flags = ring;
+ i915_execbuffer2_set_context_id(execbuf, 0);
+ execbuf.rsvd2 = 0;
+
+ drmtest_disable_prefault();
+ gem_exec(fd, &execbuf);
+ gem_sync(fd, handle);
+ drmtest_enable_prefault();
+
+ munmap(gtt_relocs, 4096);
+ gem_close(fd, handle_relocs);
+ gem_close(fd, dst);
+ gem_close(fd, src);
+ gem_close(fd, handle);
+}
+
+int main(int argc, char **argv)
+{
+ int fd;
+
+ /* if user isn't root or kernel doesn't supply
+ * /sys/module/i915/parameters/prefault_disable,
+ * program exit immediately. */
+ if (drmtest_enable_prefault() < 0)
+ return 0;
+
+ drmtest_subtest_init(argc, argv);
+
+ fd = drm_open_any();
+
+ if (drmtest_run_subtest("reloc"))
+ test_disable_prefault_reloc(fd);
+
+ close(fd);
+
+ return 0;
+}
+
--
1.8.3.2
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