[RFC] tests/gem_bo_falloc: New igt for testing gem_fallocate() ioctl

[arun.siluvery@linux.intel.com]

From: "Siluvery, Arun" <arun.siluvery@intel.com>

This ioctl allows vary the effective size of the gem object.
User can mark certain range in object space as scratch thus
effectively modifying the size used.

Signed-off-by: Siluvery, Arun <arun.siluvery@intel.com>
---
 tests/Makefile.sources |   1 +
 tests/gem_bo_falloc.c  | 469 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 470 insertions(+)
 create mode 100644 tests/gem_bo_falloc.c

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 88866ac..25c010e 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -120,6 +120,7 @@ TESTS_progs = \
 	gem_unref_active_buffers \
 	gem_vmap_blits \
 	gem_wait_render_timeout \
+	gem_bo_falloc \
 	gen3_mixed_blits \
 	gen3_render_linear_blits \
 	gen3_render_mixed_blits \
diff --git a/tests/gem_bo_falloc.c b/tests/gem_bo_falloc.c
new file mode 100644
index 0000000..2d97d83
--- /dev/null
+++ b/tests/gem_bo_falloc.c
@@ -0,0 +1,469 @@
+/*
+ * 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.
+ *
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+#include "intel_chipset.h"
+#include "intel_gpu_tools.h"
+
+#define OBJECT_SIZE             (8 * PAGE_SIZE)
+#define COPY_BLT_CMD		(2<<29|0x53<<22|0x6)
+#define BLT_WRITE_ALPHA		(1<<21)
+#define BLT_WRITE_RGB		(1<<20)
+#define BLT_SRC_TILED		(1<<15)
+#define BLT_DST_TILED		(1<<11)
+
+static uint8_t buf[OBJECT_SIZE];
+
+static uint32_t create_bo(int fd)
+{
+	int i;
+	uint32_t page_count;
+	uint32_t handle;
+
+	handle = gem_create(fd, sizeof(buf));
+	page_count = sizeof(buf) / PAGE_SIZE;
+
+	for (i = 0; i < page_count; ++i)
+		memset(buf + (i * PAGE_SIZE), i+1, PAGE_SIZE);
+
+	gem_write(fd, handle, 0, buf, sizeof(buf));
+	return handle;
+}
+
+static int gem_linear_blt(int fd,
+			  uint32_t *batch,
+			  uint32_t src,
+			  uint32_t dst,
+			  uint32_t length,
+			  struct drm_i915_gem_relocation_entry *reloc)
+{
+	uint32_t *b = batch;
+	int height = length / (16 * 1024);
+
+	igt_assert(height <= 1<<16);
+
+	if (height) {
+		int i = 0;
+		b[i++] = COPY_BLT_CMD | BLT_WRITE_ALPHA | BLT_WRITE_RGB;
+		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+			b[i-1]+=2;
+		b[i++] = 0xcc << 16 | 1 << 25 | 1 << 24 | (16*1024);
+		b[i++] = 0;
+		b[i++] = height << 16 | (4*1024);
+		b[i++] = 0;
+		reloc->offset = (b-batch+4) * sizeof(uint32_t);
+		reloc->delta = 0;
+		reloc->target_handle = dst;
+		reloc->read_domains = I915_GEM_DOMAIN_RENDER;
+		reloc->write_domain = I915_GEM_DOMAIN_RENDER;
+		reloc->presumed_offset = 0;
+		reloc++;
+		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+			b[i++] = 0; /* FIXME */
+
+		b[i++] = 0;
+		b[i++] = 16*1024;
+		b[i++] = 0;
+		reloc->offset = (b-batch+7) * sizeof(uint32_t);
+		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+			reloc->offset += sizeof(uint32_t);
+		reloc->delta = 0;
+		reloc->target_handle = src;
+		reloc->read_domains = I915_GEM_DOMAIN_RENDER;
+		reloc->write_domain = 0;
+		reloc->presumed_offset = 0;
+		reloc++;
+		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+			b[i++] = 0; /* FIXME */
+
+		b += i;
+		length -= height * 16*1024;
+	}
+
+	if (length) {
+		int i = 0;
+		b[i++] = COPY_BLT_CMD | BLT_WRITE_ALPHA | BLT_WRITE_RGB;
+		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+			b[i-1]+=2;
+		b[i++] = 0xcc << 16 | 1 << 25 | 1 << 24 | (16*1024);
+		b[i++] = height << 16;
+		b[i++] = (1+height) << 16 | (length / 4);
+		b[i++] = 0;
+		reloc->offset = (b-batch+4) * sizeof(uint32_t);
+		reloc->delta = 0;
+		reloc->target_handle = dst;
+		reloc->read_domains = I915_GEM_DOMAIN_RENDER;
+		reloc->write_domain = I915_GEM_DOMAIN_RENDER;
+		reloc->presumed_offset = 0;
+		reloc++;
+		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+			b[i++] = 0; /* FIXME */
+
+		b[i++] = height << 16;
+		b[i++] = 16*1024;
+		b[i++] = 0;
+		reloc->offset = (b-batch+7) * sizeof(uint32_t);
+		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+			reloc->offset += sizeof(uint32_t);
+		reloc->delta = 0;
+		reloc->target_handle = src;
+		reloc->read_domains = I915_GEM_DOMAIN_RENDER;
+		reloc->write_domain = 0;
+		reloc->presumed_offset = 0;
+		reloc++;
+		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+			b[i++] = 0; /* FIXME */
+
+		b += i;
+	}
+
+	b[0] = MI_BATCH_BUFFER_END;
+	b[1] = 0;
+
+	return (b+2 - batch) * sizeof(uint32_t);
+}
+
+static void do_blit(int fd, uint32_t src, uint32_t dst, uint32_t length)
+{
+	int len;
+	int ring;
+	uint32_t handle;
+	uint32_t buf[20];
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec[3];
+	struct drm_i915_gem_relocation_entry reloc[4];
+
+	handle = gem_create(fd, 4096);
+
+	len = gem_linear_blt(fd, buf, src, dst, length, 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;
+
+	exec[2].handle = handle;
+	if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+		exec[2].relocation_count = len > 56 ? 4 : 2;
+	else
+		exec[2].relocation_count = len > 40 ? 4 : 2;
+	exec[2].relocs_ptr = (uintptr_t)reloc;
+	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;
+
+	gem_execbuf(fd, &execbuf);
+
+	gem_sync(fd, handle);
+
+	fflush(stdout);
+	gem_close(fd, handle);
+}
+
+static int do_falloc(int fd, int handle,
+		     uint32_t mode, uint32_t start, uint32_t length)
+{
+	int ret;
+	struct drm_i915_gem_fallocate gem_bo;
+	gem_bo.handle = handle;
+	gem_bo.start = start;
+	gem_bo.length = length;
+	gem_bo.mode = mode;
+	ret = ioctl(fd, DRM_IOCTL_I915_GEM_FALLOCATE, &gem_bo);
+	return ret;
+}
+
+static void test_gem_falloc_arguments_validation(int fd)
+{
+	int ret;
+	uint32_t handle;
+	struct drm_i915_gem_fallocate gem_bo;
+
+	handle = gem_create(fd, OBJECT_SIZE);
+	/* invalid mode */
+	ret = do_falloc(fd, handle, ~0, 0, OBJECT_SIZE >> 1);
+	igt_assert(ret != 0);
+
+	ret = do_falloc(fd, handle, 0, 0, OBJECT_SIZE >> 1);
+	igt_assert(ret != 0);
+
+	/* invalid start */
+	ret = do_falloc(fd, handle, I915_GEM_FALLOC_MARK_SCRATCH,
+			OBJECT_SIZE + (OBJECT_SIZE >> 1),
+			OBJECT_SIZE >> 1);
+	igt_assert(ret != 0);
+
+	/* invalid length */
+	ret = do_falloc(fd, handle, I915_GEM_FALLOC_MARK_SCRATCH,
+			OBJECT_SIZE >> 1, ~0);
+	igt_assert(ret != 0);
+
+	/* marked region overflowing obj range */
+	ret = do_falloc(fd, handle, I915_GEM_FALLOC_MARK_SCRATCH,
+			OBJECT_SIZE >> 1, OBJECT_SIZE);
+	igt_assert(ret != 0);
+
+	gem_close(fd, handle);
+}
+
+static void test_gem_falloc_random_usage(int fd)
+{
+	int ret;
+	uint32_t src, dst;
+	uint8_t *src_addr, *dst_addr;
+	struct drm_i915_gem_fallocate gem_bo;
+	uint8_t buf[OBJECT_SIZE];
+
+	src = create_bo(fd);
+	dst = gem_create(fd, OBJECT_SIZE);
+
+	gem_read(fd, src, 0, buf, OBJECT_SIZE);
+	do_blit(fd, src, dst, OBJECT_SIZE);
+
+	src_addr = gem_mmap__gtt(fd, src, OBJECT_SIZE, PROT_WRITE | PROT_READ);
+	dst_addr = gem_mmap__gtt(fd, dst, OBJECT_SIZE, PROT_WRITE | PROT_READ);
+	igt_assert(memcmp(dst_addr, src_addr, OBJECT_SIZE) == 0);
+
+	/* mark whole object as scratch */
+	ret = do_falloc(fd, dst, I915_GEM_FALLOC_MARK_SCRATCH,
+			0, OBJECT_SIZE);
+	igt_assert(ret == 0);
+	igt_assert(memcmp(dst_addr, src_addr, OBJECT_SIZE) != 0);
+
+
+	/* unmark whole object */
+	ret = do_falloc(fd, dst, I915_GEM_FALLOC_UNMARK_SCRATCH,
+			0, OBJECT_SIZE);
+	igt_assert(ret == 0);
+
+	gem_write(fd, dst, 0, buf, OBJECT_SIZE);
+
+	memset(buf, 0x00, OBJECT_SIZE);
+	gem_read(fd, dst, 0, buf, OBJECT_SIZE);
+	igt_assert(memcmp(buf, src_addr, OBJECT_SIZE) == 0);
+
+	munmap(src_addr, OBJECT_SIZE);
+	munmap(dst_addr, OBJECT_SIZE);
+	gem_close(fd, src);
+	gem_close(fd, dst);
+}
+
+static void test_gem_falloc_pwrite(int fd)
+{
+	int ret;
+	uint32_t offset;
+	uint32_t src, dst;
+	uint8_t *src_addr, *dst_addr;
+	struct drm_i915_gem_fallocate gem_bo;
+	uint8_t src_buf[OBJECT_SIZE];
+	uint8_t dst_buf[OBJECT_SIZE];
+
+	src = create_bo(fd);
+	dst = create_bo(fd);
+
+	ret = do_falloc(fd, dst, I915_GEM_FALLOC_MARK_SCRATCH,
+			OBJECT_SIZE >> 1, OBJECT_SIZE >> 1);
+	igt_assert(ret == 0);
+
+	gem_read(fd, src, 0, src_buf, OBJECT_SIZE);
+	gem_read(fd, dst, 0, dst_buf, OBJECT_SIZE);
+	igt_assert(memcmp(src_buf, dst_buf, OBJECT_SIZE) != 0);
+
+	ret = do_falloc(fd, dst, I915_GEM_FALLOC_UNMARK_SCRATCH,
+			OBJECT_SIZE >> 1, OBJECT_SIZE >> 1);
+	igt_assert(ret == 0);
+	offset = OBJECT_SIZE >> 1;
+	gem_write(fd, dst, offset, src_buf + offset, OBJECT_SIZE >> 1);
+
+	memset(dst_buf, 0x00, OBJECT_SIZE);
+	gem_read(fd, dst, 0, dst_buf, OBJECT_SIZE);
+	igt_assert(memcmp(src_buf, dst_buf, OBJECT_SIZE) == 0);
+
+	gem_close(fd, src);
+	gem_close(fd, dst);
+}
+
+static void test_gem_falloc_multiple_regions(int fd)
+{
+	int i;
+	int ret, len;
+	uint32_t handle, src, dst;
+	uint32_t falloc_start, falloc_len;
+	uint8_t *src_addr, *dst_addr;
+
+	printf("GEM object falloc of multiple regions test\n");
+
+	src = create_bo(fd);
+	dst = gem_create(fd, OBJECT_SIZE);
+
+	do_blit(fd, src, dst, OBJECT_SIZE);
+
+	src_addr = gem_mmap__gtt(fd, src, OBJECT_SIZE, PROT_WRITE | PROT_READ);
+	dst_addr = gem_mmap__gtt(fd, dst, OBJECT_SIZE, PROT_WRITE | PROT_READ);
+	igt_assert(memcmp(dst_addr, src_addr, OBJECT_SIZE) == 0);
+
+	/* mark multiple ranges without overlap */
+	falloc_start = OBJECT_SIZE >> 2;
+	falloc_len = OBJECT_SIZE >> 2;
+	ret = do_falloc(fd, dst, I915_GEM_FALLOC_MARK_SCRATCH,
+			falloc_start, falloc_len);
+	igt_assert(ret == 0);
+
+	falloc_start = (OBJECT_SIZE >> 1) + (OBJECT_SIZE >> 2);
+	ret = do_falloc(fd, dst, I915_GEM_FALLOC_MARK_SCRATCH,
+			falloc_start, falloc_len);
+	igt_assert(ret == 0);
+
+	/* do some operation */
+	do_blit(fd, src, dst, OBJECT_SIZE);
+	igt_assert(memcmp(dst_addr, src_addr, OBJECT_SIZE) != 0);
+
+	/* unmark multiple ranges without overlap */
+	falloc_start = OBJECT_SIZE >> 2;
+	falloc_len = OBJECT_SIZE >> 2;
+	ret = do_falloc(fd, dst, I915_GEM_FALLOC_UNMARK_SCRATCH,
+			falloc_start, falloc_len);
+	igt_assert(ret == 0);
+
+	falloc_start = (OBJECT_SIZE >> 1) + (OBJECT_SIZE >> 2);
+	falloc_len = OBJECT_SIZE >> 2;
+	ret = do_falloc(fd, dst, I915_GEM_FALLOC_UNMARK_SCRATCH,
+			falloc_start, falloc_len);
+	igt_assert(ret == 0);
+
+	munmap(dst_addr, OBJECT_SIZE);
+	dst_addr = gem_mmap__gtt(fd, dst, OBJECT_SIZE, PROT_WRITE | PROT_READ);
+
+	/* blt whole obj to ensure unmarking is ok */
+	do_blit(fd, src, dst, OBJECT_SIZE);
+
+	igt_assert(memcmp(dst_addr, src_addr, OBJECT_SIZE) == 0);
+
+
+	/* mark multiple ranges with overlap */
+	falloc_start = OBJECT_SIZE >> 2;
+	falloc_len = OBJECT_SIZE >> 2;
+	ret = do_falloc(fd, dst, I915_GEM_FALLOC_MARK_SCRATCH,
+		  falloc_start, falloc_len);
+	igt_assert(ret == 0);
+
+	falloc_len = OBJECT_SIZE >> 1;
+	ret = do_falloc(fd, dst, I915_GEM_FALLOC_MARK_SCRATCH,
+		  falloc_start, falloc_len);
+	igt_assert(ret == 0);
+
+	/* do some operation */
+	do_blit(fd, src, dst, OBJECT_SIZE);
+	igt_assert(memcmp(dst_addr, src_addr, OBJECT_SIZE) != 0);
+
+	/* unmark the whole region */
+	falloc_start = OBJECT_SIZE >> 2;
+	falloc_len = OBJECT_SIZE >> 1;
+	ret = do_falloc(fd, dst, I915_GEM_FALLOC_UNMARK_SCRATCH,
+		  falloc_start, falloc_len);
+	igt_assert(ret == 0);
+
+	munmap(dst_addr, OBJECT_SIZE);
+	dst_addr = gem_mmap__gtt(fd, dst, OBJECT_SIZE, PROT_WRITE | PROT_READ);
+
+	/* blt whole obj to ensure unmarking is ok */
+	do_blit(fd, src, dst, OBJECT_SIZE);
+
+	igt_assert(memcmp(dst_addr, src_addr, OBJECT_SIZE) == 0);
+
+	munmap(src_addr, OBJECT_SIZE);
+	munmap(dst_addr, OBJECT_SIZE);
+	gem_close(fd, src);
+	gem_close(fd, dst);
+}
+
+int fd;
+
+int main(int argc, char **argv)
+{
+	igt_subtest_init(argc, argv);
+
+	igt_fixture
+		fd = drm_open_any();
+
+	igt_subtest("gem_falloc arguments validation")
+		test_gem_falloc_arguments_validation(fd);
+
+	igt_subtest("gem_falloc random usage")
+		test_gem_falloc_random_usage(fd);
+
+	igt_subtest("gem_falloc with pwrite/pread")
+		test_gem_falloc_pwrite(fd);
+
+	igt_subtest("gem_falloc multiple regions")
+		test_gem_falloc_multiple_regions(fd);
+
+	close(fd);
+	igt_exit();
+}
-- 
1.9.2

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