[i-g-t] tests/gem_buffered_svm_test: New tests for buffered SVM feature

Commit Message

Vinay Belgaumkar Nov. 10, 2015, 4:02 p.m. UTC

v1: These tests exercise the userptr ioctl to create shared buffers
between CPU and GPU. They contain error and normal usage scenarios.
They also contain a couple of stress tests which copy buffers between
CPU and GPU. These tests rely on the softpin patch in order to pin buffers
to a certain VA.

Caveat: These tests were designed to run on 64-bit system. Future work
includes adding logic to ensure these tests can run on 32-bit systems with
PPGTT support. Some tests are currently disabled for 32-bit systems for that
reason.

v2: Added cc and signed-off-by fields

Testcase: igt/gem_buffered_svm_test

Cc: Michel Thierry <[e-mail]>
Signed-off-by: Vinay Belgaumkar <[e-mail]>
---
 tests/Makefile.sources        |    1 +
 tests/gem_buffered_svm_test.c | 1490 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 1491 insertions(+)
 create mode 100644 tests/gem_buffered_svm_test.c

Comments

Tvrtko Ursulin Nov. 11, 2015, 3:10 p.m. UTC | #1

Hi,

On 10/11/15 16:02, Vinay Belgaumkar wrote:
> v1: These tests exercise the userptr ioctl to create shared buffers

Normally we don't put v1 at the beginning of the commit message.

> between CPU and GPU. They contain error and normal usage scenarios.
> They also contain a couple of stress tests which copy buffers between
> CPU and GPU. These tests rely on the softpin patch in order to pin buffers
> to a certain VA.
>
> Caveat: These tests were designed to run on 64-bit system. Future work
> includes adding logic to ensure these tests can run on 32-bit systems with
> PPGTT support. Some tests are currently disabled for 32-bit systems for that
> reason.
>
> v2: Added cc and signed-off-by fields
>
> Testcase: igt/gem_buffered_svm_test

Infinite recursion! :) This tag is normally put into kernel patches to 
point to the relevant IGT.

> Cc: Michel Thierry <[e-mail]>
> Signed-off-by: Vinay Belgaumkar <[e-mail]>
> ---
>   tests/Makefile.sources        |    1 +
>   tests/gem_buffered_svm_test.c | 1490 +++++++++++++++++++++++++++++++++++++++++
>   2 files changed, 1491 insertions(+)
>   create mode 100644 tests/gem_buffered_svm_test.c
>
> diff --git a/tests/Makefile.sources b/tests/Makefile.sources
> index 8fb2de8..2ce4216 100644
> --- a/tests/Makefile.sources
> +++ b/tests/Makefile.sources
> @@ -11,6 +11,7 @@ TESTS_progs_M = \
>   	drv_hangman \
>   	gem_bad_reloc \
>   	gem_basic \
> +	gem_buffered_svm_test \
>   	gem_caching \
>   	gem_close_race \
>   	gem_concurrent_blit \

Also need to put a binary name to tests/.gitignore I think.

> diff --git a/tests/gem_buffered_svm_test.c b/tests/gem_buffered_svm_test.c
> new file mode 100644
> index 0000000..44d342a
> --- /dev/null
> +++ b/tests/gem_buffered_svm_test.c
> @@ -0,0 +1,1490 @@
> +/*
> + * Copyright © 2015 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:
> + *    Vinay Belgaumkar <[e-mail]?

s/?/>/

> +      Thomas Daniel <[e-mail]>
> + *
> + */
> +
> +#include <unistd.h>
> +#include <stdlib.h>
> +#include <stdint.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 <sys/time.h>
> +#include <malloc.h>
> +#include "drm.h"
> +#include "ioctl_wrappers.h"
> +#include "drmtest.h"
> +#include "intel_chipset.h"
> +#include "intel_io.h"
> +#include "i915_drm.h"
> +#include <assert.h>
> +#include <sys/wait.h>
> +#include <sys/ipc.h>
> +#include <sys/shm.h>
> +#include "igt_kms.h"
> +#include <inttypes.h>
> +#include <sys/types.h>
> +#include <sys/stat.h>
> +
> +
> +#if (INTPTR_MAX == INT32_MAX)
> +	#define IS_32BIT_USER
> +#endif

Could use a built-in gcc define, even at the call sites directly. Like:

#ifdef __x86_64

> +#define OBJECT_SIZE 16384
> +#define BO_SIZE 4 * 4096
> +#define STORE_BATCH_BUFFER_SIZE 6
> +#define STRESS_BATCH_BUFFER_SIZE 5
> +#define EXEC_OBJECT_PINNED	(1<<4)
> +#define EXEC_OBJECT_SUPPORTS_48B_ADDRESS (1<<3)
> +#define SHARED_BUFFER_SIZE 4096
> +#define NUM_EXEC_OBJECTS 2
> +
> +typedef struct drm_i915_gem_userptr i915_gem_userptr;

I am slightly against this approach. If this is the only test which does 
it it creates inconsistency which makes working in the code base a 
little bit harder.

> +static i915_gem_userptr* gem_create_userptr_struct(void* ptr, int size, int read_only);

Better to use 64-bit size and bool for the flag.

Also IGT and kernel coding style is "something *func()", not "something* 
func()".

> +
> +static void* gem_create_mem_buffer(int size);

int again is not ideal for size.

> +static void gem_invalid_userptr_test(void);
> +static int gem_call_userptr_ioctl(int fd, i915_gem_userptr* userptr);
> +static void gem_basic_test(bool);
> +static void gem_pin_invalid_vma_test(void);
> +static void gem_pin_overlap_test(void);
> +static void gem_shmem_test(void);
> +static void gem_pin_high_address_test(void);
> +static void gem_pin_mmap_anonymous_test(void);
> +static void gem_pin_mmap_file_test(void);
> +
> +/* incorrect args to userptr ioctl
> +   - Write to Read Only buffer
> +*/

What does this comment relate to at this position in the file?

> +static int gem_call_userptr_ioctl(int fd, i915_gem_userptr* userptr)
> +{
> +	int ret;
> +
> +	ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_USERPTR, userptr);
> +
> +	if (ret)
> +		ret = errno;
> +
> +	return ret;
> +}

There are a few call sites which do the same thing outside this test so 
maybe it would be worth extracting this and naming it something like 
igt_ioctl or something. If you feel like it.

> +
> +static i915_gem_userptr* gem_create_userptr_struct(void* ptr, int size, int read_only)
> +{
> +	i915_gem_userptr* userptr;
> +
> +	userptr = (i915_gem_userptr*)calloc(1, sizeof(i915_gem_userptr));
> +
> +	igt_assert(userptr != NULL);
> +
> +	if (userptr)
> +	{
> +		userptr->user_ptr = (uintptr_t)ptr;
> +		userptr->user_size = size;
> +		userptr->flags = I915_USERPTR_UNSYNCHRONIZED;
> +
> +		if (read_only)
> +			userptr->flags |= I915_USERPTR_READ_ONLY;
> +	}
> +
> +	return userptr;

This is a bit unusual since all the call sites free the struct straight 
away. So why not just have it on stack locally?

> +}
> +
> +
> +
> +/** Creates a CPU buffer

Maybe say it is aligned.

> + *  @size - size of buffer
> + *  RETURNS pointer to buffer of @size
> +*/
> +
> +static void* gem_create_mem_buffer(int size)

gem_ is a bad prefix for this one since it doesn't involve GEM.

> +{
> +	void* addr;
> +
> +	addr = memalign(4096, size);

posix_memalign I think, memalign is described as obsolete by the man page.

> +	igt_assert(addr != NULL);
> +
> +	return addr;
> +}
> +
> +/**
> + * This test will send an invalid userptr struct to the ioctl
> + * Expected result is ioctl call should return FAILURE
> +*/
> +static void gem_invalid_userptr_test(void)
> +{
> +	i915_gem_userptr* userptr = NULL;
> +	int fd, ret;
> +
> +	fd = drm_open_driver(DRIVER_INTEL);
> +
> +	ret = gem_call_userptr_ioctl(fd, userptr);
> +
> +	/* Expect to fail */
> +	igt_assert(ret);
> +}

Strictly speaking this does not belong in this test. Main userptr IGT 
covers these things and in more detail.

> +
> +/** setup_exec_obj - populate exec object
> + * @exec - exec object
> + * @handle - handle to gem buffer
> + * flags - any flags
> + * offset - requested VMA
> + */
> +static void setup_exec_obj(struct drm_i915_gem_exec_object2 *exec, __u32 handle, __u32 flags, uint32_t* offset)

Why is offset 32-bit ? And why mix __u and stdint data types?

> +{
> +	memset(exec, 0, sizeof(struct drm_i915_gem_exec_object2));
> +	exec->handle = handle;
> +	exec->flags = flags;
> +	exec->offset = (uintptr_t)offset;

Offset should be __u64 and then no cast needed, this is even truncating 
with 32-bit userspace.

> +}
> +
> +/**
> + * gem_store_data_svm - populate batch buffer with MI_STORE_DATA_IMM command
> + * @fd: drm file descriptor
> + * @buf: batch buffer
> + * @buffer_size: size of buffer
> + * @addr: destination Virtual address
> + * @data: data to be store at destination
> + * @end: whether to end batch buffer or not
> + */
> +#define MI_COMMAND 0
> +#define MI_STORE_DATA_IMM 0x20 << 23

MI_STORE_DWORD_IMM in lib/intel_reg.h

> +#define USE_PPGTT 0x0 << 22

MI_COMMAND and USE_PPGTT should be zeros and explicitly mentioned?

> +#define DWORD_LENGTH 0x2
> +static int gem_store_data_svm(int fd, uint32_t* cmd_buf, uint32_t* vaddr,
> +			      uint32_t data, bool end)
> +{
> +	int i = 0;
> +
> +	cmd_buf[i++] = MI_COMMAND | MI_STORE_DATA_IMM | USE_PPGTT | DWORD_LENGTH;
> +	cmd_buf[i++] = (uintptr_t)vaddr & 0xFFFFFFFC;
> +	#ifdef IS_32BIT_USER
> +		cmd_buf[i++] = 0;
> +	#else // 64 bit
> +		cmd_buf[i++] = ((uintptr_t)vaddr >> 32) & 0xFFFF; /* bits 32:47 */
> +	#endif

Not sure I understand this 100% but do you really need the #ifdefs? 
Wouldn't vaddr by definition only have 32-bit of content on 32-bit 
userspace? So if vaddr was a 64-bit type you could just shift and mask 
and end up with zeros automatically in that case.

> +
> +	cmd_buf[i++] = data;
> +	if (end)
> +	{
> +		cmd_buf[i++] = MI_BATCH_BUFFER_END;
> +		cmd_buf[i++] = 0;
> +	}
> +
> +	return (i * sizeof(uint32_t));
> +}
> +
> +/**
> + * gem_store_data_svm - populate batch buffer with MI_STORE_DATA_IMM command

Copy & paste error.

> + * This one fills up reloc buffer as well
> + * @fd: drm file descriptor
> + * @buf: batch buffer
> + * @buffer_size: size of buffer
> + * @addr: destination Virtual address
> + * @data: data to be store at destination
> + * @reloc - relocation entry
> + * @end: whether to end batch buffer or not
> + */
> +
> +static int gem_store_data(int fd, uint32_t* cmd_buf,
> +			      uint32_t handle, uint32_t data,
> +			      struct drm_i915_gem_relocation_entry *reloc,
> +			      bool end)
> +{
> +	int i = 0;
> +
> +	cmd_buf[i++] = MI_COMMAND | MI_STORE_DATA_IMM | USE_PPGTT | DWORD_LENGTH;
> +	cmd_buf[i++] = 0; /* lower 31 bits of 48 bit address - 0 because reloc is needed */
> +	cmd_buf[i++] = 0; /* upper 15 bits of 48 bit address - 0 because reloc is needed */
> +	reloc->offset = 1 * sizeof(uint32_t);
> +	reloc->delta = 0;
> +	reloc->target_handle = handle;
> +	reloc->read_domains = I915_GEM_DOMAIN_RENDER;
> +	reloc->write_domain = I915_GEM_DOMAIN_RENDER;
> +	reloc->presumed_offset = 0;
> +	reloc++;
> +	cmd_buf[i++] = data;
> +	if (end)
> +	{
> +		cmd_buf[i++] = MI_BATCH_BUFFER_END;
> +		cmd_buf[i++] = 0;
> +	}
> +
> +	return (i * sizeof(uint32_t));
> +}
> +
> +
> +/** gem_basic_test - This test will create a shared buffer, and create a command
> + *  for GPU to write data in it
> + *  CPU will read and make sure expected value is obtained
> + *  @valid_shared_buffer - whether test with valid malloc'd buffer or not
> +
> +@code
> +   if (valid_shared_buffer == true)
> +   Malloc a 4K buffer
> +   Share buffer with with GPU by using userptr ioctl
> +   Create batch buffer to write DATA to first dword of buffer
> +   Use virtual address of buffer as destination address in batch buffer
> +   Set EXEC_OBJECT_PINNED flag in exec object
> +   Set 'offset' in exec object to shared buffer VMA
> +   Submit execbuffer
> +   Verify value of first DWORD in shared buffer matches DATA
> +
> +   if (valid_shared_buffer == false)
> +   Declare null buffer
> +   Call Userptr ioctl with null buffer
> +   Run Basic Test
> +   Test should fail at submit execbuffer
> +@endcode
> +*/
> +static void gem_basic_test(bool valid_shared_buffer)
> +{
> +	i915_gem_userptr* userptr = NULL;
> +	int fd, ret;
> +	uint32_t* shared_buffer = NULL;
> +	struct drm_i915_gem_execbuffer2 execbuf;
> +	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
> +	uint32_t batch_buffer[STORE_BATCH_BUFFER_SIZE];
> +	uint32_t batch_buf_handle, shared_buf_handle;
> +	int ring, len;
> +	const uint32_t data = 0x12345678;
> +
> +	fd = drm_open_driver(DRIVER_INTEL);
> +	batch_buf_handle = gem_create(fd, BO_SIZE);
> +
> +	/* create cpu buffer, set to all 0xF's */
> +	if (valid_shared_buffer)
> +	{

Coding style issue with curly braces throughout.

> +		shared_buffer = gem_create_mem_buffer(BO_SIZE);
> +		//*shared_buffer = 0xFFFFFFFF;

?

> +	}

But I would drop the valid_shared_buffer business from this test 
altogether. It is covered in the basic userptr testcase so only creates 
noise here.

> +	
> +	/* share with GPU */
> +	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);

false I suppose.

> +	ret = gem_call_userptr_ioctl(fd, userptr);
> +	igt_assert_eq(ret, 0);
> +
> +	/* Get handle for shared buffer */
> +	shared_buf_handle = userptr->handle;
> +	free(userptr);

It looks like you just need a helper which asserts on ioctl and returns 
the handle. To avoid duplicating this pattern throughout the code.

> +
> +	/* create command buffer with write command */
> +	len = gem_store_data_svm(fd, batch_buffer, shared_buffer, data, true);
> +	igt_assert_lte(len, STORE_BATCH_BUFFER_SIZE * 4);

Hm, gem_store_data_svm would be better to make sure it doesn't overwrite 
the provided buffer. Checking after the fact is not that strong.

> +
> +	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +	/* submit command buffer */
> +	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, shared_buffer);
> +	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
> +
> +	ring = 0;
> +	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +		ring = I915_EXEC_BLT;

Why it is interesting to use the blitter ring and not always the render 
ring?

> +
> +	execbuf.buffers_ptr = (uintptr_t)exec_object2;
> +	execbuf.buffer_count = NUM_EXEC_OBJECTS;
> +	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;
> +
> +	if (valid_shared_buffer)
> +	{
> +		gem_execbuf(fd, &execbuf);
> +	}
> +	else
> +	{
> +		/* Expect execbuf to fail */
> +		ret = drmIoctl(fd,
> +		       DRM_IOCTL_I915_GEM_EXECBUFFER2,
> +		       &execbuf);
> +		igt_assert_neq(ret, 0);
> +	}
> +	gem_sync(fd, batch_buf_handle);

Assert on exec_object[2].offset == shared_buffer. Also throughout the 
test, wherever you ask for EXEC_OBJECT_PINNED.

> +	gem_close(fd, batch_buf_handle);
> +	close(fd);
> +
> +	// check on CPU to see if value changes
> +	if (valid_shared_buffer)
> +	{
> +		igt_fail_on_f(shared_buffer[0] != data,
> +			      "\nCPU read does not match GPU write, expected: 0x%x, got: 0x%x\n", data, shared_buffer[0]);
> +

Comment valid throughout - I think you need to set the shared_buf_handle 
to CPU domain before accessing it after touching with the GPU.

> +		free(shared_buffer);
> +	}
> +}
> +
> +/** gem_multiple_process_test - Run basic test simultaneously with multiple processes
> +*   This will test pinning same VA separately in each process
> +
> +    fork();
> +    Execute basic test in parent/child processes
> +
> +**/
> +
> +static void gem_multiple_process_test(void)
> +{
> +	int status;
> +	pid_t child_pid, wait_pid;
> +	child_pid = fork();
> +
> +	if (child_pid == 0)
> +	{
> +		gem_basic_test(true);
> +		_exit(0);
> +	}
> +	else
> +	{
> +		gem_basic_test(true);
> +		wait_pid = wait(&status);
> +		igt_assert(wait_pid != -1);
> +	}
> +}

Doesn't check for errors from fork.

But IGT has fork helpers which I think you should use.

> +
> +/** gem_repin_test
> + * This test tries to repin a buffer at a previously pinned vma
> + * from a different execbuf.
> +
> +@code
> +   Malloc a 4K buffer
> +   Share buffer with with GPU by using userptr ioctl
> +   Create batch buffer to write DATA to first dword of buffer
> +   Use virtual address of buffer as destination address in batch buffer
> +   Set EXEC_OBJECT_PINNED flag in exec object
> +   Set 'offset' in exec object to shared buffer VMA
> +   Submit execbuffer
> +   Verify value of first DWORD in shared buffer matches DATA
> +
> +   Create second shared buffer
> +   Follow all steps above
> +   Execpt, for offset, use VMA of first buffer above
> +   Submit execbuffer
> +   Verify value of first DWORD in second shared buffer matches DATA
> +
> +@endcode
> +**/
> +
> +static void gem_repin_test(void)
> +{
> +	i915_gem_userptr* userptr = NULL;
> +	i915_gem_userptr* userptr1 = NULL;
> +	int fd, ret;
> +	uint32_t* shared_buffer = NULL;
> +	uint32_t* shared_buffer1 = NULL;
> +	struct drm_i915_gem_execbuffer2 execbuf, execbuf1;
> +	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
> +	uint32_t batch_buffer[STORE_BATCH_BUFFER_SIZE];
> +	uint32_t batch_buf_handle, shared_buf_handle, shared_buf_handle1;
> +	int ring, len;
> +	const uint32_t data = 0x12345678;
> +
> +	// Create gem object
> +	fd = drm_open_driver(DRIVER_INTEL);
> +	batch_buf_handle = gem_create(fd, BO_SIZE);
> +
> +	// create cpu buffer, set to all 0xF's
> +	shared_buffer = gem_create_mem_buffer(BO_SIZE);
> +	shared_buffer1 = gem_create_mem_buffer(BO_SIZE * 2);

Why does 2nd one needs to be bigger?

> +
> +	// share with GPU
> +	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
> +	ret = gem_call_userptr_ioctl(fd, userptr);
> +	igt_assert_eq(ret, 0);
> +
> +	userptr1 = gem_create_userptr_struct(shared_buffer1, BO_SIZE * 2, 0);
> +	ret = gem_call_userptr_ioctl(fd, userptr1);
> +	igt_assert_eq(ret, 0);
> +
> +	// Get handle for shared buffer
> +	shared_buf_handle = userptr->handle;
> +	shared_buf_handle1 = userptr1->handle;
> +	free(userptr);
> +	free(userptr1);
> +
> +	// create command buffer with write command
> +	len = gem_store_data_svm(fd, batch_buffer, shared_buffer, data, true);
> +	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +	// submit command buffer
> +	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, shared_buffer);
> +	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
> +
> +	ring = 0;
> +	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +		ring = I915_EXEC_BLT;
> +
> +	execbuf.buffers_ptr = (uintptr_t)exec_object2;
> +	execbuf.buffer_count = NUM_EXEC_OBJECTS;
> +	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, batch_buf_handle);

Are these blocks, from setup_exec_obj, filling the struct, maybe even to 
execbuf and sync look like candidates for extracting into a helper 
function? Three instances so far, need to see what happens further down...

> +
> +	// Second buffer
> +	// create command buffer with write command
> +	len = gem_store_data_svm(fd, batch_buffer, shared_buffer1, data, true);
> +	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +	// submit command buffer
> +	// Pin at shared_buffer, not shared_buffer1

Maybe expand the comment to explain that we are asking the 2nd object to 
be pinned at the same GFX VA as the first object to verify 1st will be 
evicted to make space?

If I got that right then also is repin the best name for the test? Maybe 
something with evict?

> +	setup_exec_obj(&exec_object2[0], shared_buf_handle1, EXEC_OBJECT_PINNED, shared_buffer);
> +	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
> +
> +	ring = 0;
> +	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +		ring = I915_EXEC_BLT;
> +
> +	execbuf1.buffers_ptr = (uintptr_t)exec_object2;
> +	execbuf1.buffer_count = NUM_EXEC_OBJECTS;
> +	execbuf1.batch_start_offset = 0;
> +	execbuf1.batch_len = len;
> +	execbuf1.cliprects_ptr = 0;
> +	execbuf1.num_cliprects = 0;
> +	execbuf1.DR1 = 0;
> +	execbuf1.DR4 = 0;
> +	execbuf1.flags = ring;
> +	i915_execbuffer2_set_context_id(execbuf1, 0);
> +	execbuf1.rsvd2 = 0;
> +
> +	gem_execbuf(fd, &execbuf1);
> +	gem_sync(fd, batch_buf_handle);
> +
> +	gem_close(fd, batch_buf_handle);
> +	close(fd);

Where are the verifications that dwords were written as expected?

> +	free(shared_buffer);
> +	free(shared_buffer1);
> +}
> +
> +
> +/** gem_repin_overlap_test
> + *  This test will attempt to pin two buffers at the same VMA as part of the same
> +    execbuffer object
> +
> +@code
> +   Malloc a 4K buffer
> +   Share buffer with with GPU by using userptr ioctl
> +   Create second shared buffer
> +   Create batch buffer to write DATA to first dword of each buffer
> +   Use virtual address of each buffer as destination addresses in batch buffer
> +   Set EXEC_OBJECT_PINNED flag in both exec objects
> +   Set 'offset' in both exec objects to first shared buffer VMA
> +   Submit execbuffer
> +   Command should return EINVAL, since we are trying to pin to same VMA
> +@endcode
> +**/
> +static void gem_pin_overlap_test(void)
> +{
> +	i915_gem_userptr* userptr = NULL;
> +	i915_gem_userptr* userptr1 = NULL;
> +	int fd, ret;
> +	uint32_t* shared_buffer = NULL;
> +	uint32_t* shared_buffer1 = NULL;
> +	struct drm_i915_gem_execbuffer2 execbuf;
> +	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS + 1];
> +	uint32_t batch_buffer[BO_SIZE];
> +	uint32_t batch_buf_handle, shared_buf_handle, shared_buf_handle1;
> +	int ring, len;
> +	const uint32_t data = 0x12345678;
> +
> +	fd = drm_open_driver(DRIVER_INTEL);
> +	batch_buf_handle = gem_create(fd, BO_SIZE);
> +
> +	shared_buffer = gem_create_mem_buffer(BO_SIZE);
> +	shared_buffer1 = gem_create_mem_buffer(BO_SIZE * 2);
> +
> +	/* share with GPU */
> +	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
> +	ret = gem_call_userptr_ioctl(fd, userptr);
> +	igt_assert_eq(ret, 0);
> +
> +	userptr1 = gem_create_userptr_struct(shared_buffer1, BO_SIZE * 2, 0);
> +	ret = gem_call_userptr_ioctl(fd, userptr1);
> +	igt_assert_eq(ret, 0);
> +
> +	shared_buf_handle = userptr->handle;
> +	shared_buf_handle1 = userptr1->handle;
> +	free(userptr);
> +	free(userptr1);
> +
> +	len = gem_store_data_svm(fd, batch_buffer, shared_buffer, data, false);
> +	len += gem_store_data_svm(fd, (batch_buffer + len/4), shared_buffer1, data, true);
> +	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +	/* submit command buffer */
> +	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, shared_buffer);
> +	setup_exec_obj(&exec_object2[1], shared_buf_handle1, EXEC_OBJECT_PINNED, shared_buffer);
> +	setup_exec_obj(&exec_object2[2], batch_buf_handle, 0, 0);
> +
> +	ring = 0;
> +	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +		ring = I915_EXEC_BLT;
> +
> +	execbuf.buffers_ptr = (uintptr_t)exec_object2;
> +	execbuf.buffer_count = NUM_EXEC_OBJECTS + 1;
> +	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;
> +
> +	ret = drmIoctl(fd,
> +	      DRM_IOCTL_I915_GEM_EXECBUFFER2,
> +	      &execbuf);
> +
> +	/* expect to fail */
> +	igt_assert(errno == 22);
> +	igt_assert_neq(ret, 0);

ret first, errno second.

> +
> +	gem_close(fd, batch_buf_handle);
> +	close(fd);
> +
> +	free(shared_buffer);
> +	free(shared_buffer1);
> +}
> +
> +
> +/** gem_evict_test
> + *  create shared buffer, pin it
> + *  create normal buffer
> + *  try and relocate to shared location
> + *  Opens: How to detect eviction occured?
> + *  i915_gem_gtt - debugfs api - grep it for the page?
> +
> +@code
> +    Create a gem buffer of 4K
> +    Malloc a 4K buffer
> +    Share buffer with GPU using userptr ioctl
> +    Create a batch buffer to write 0x11111111 and 0x22222222 in above 2 buffers
> +    Pin Shared buffer to offset '0' in GTT

Why at that address?

> +    Create reloc buffer to ensure gem buffer is relocated to GTT
> +    Submit execbuffer
> +    Verify shared buffer has 0x22222222 as expected
> +    Obtain offset of where gem object has been placed from exec object field
> +    Try to pin shared buffer at that address using 'offset' field in exec object
> +    Prevent relocation by setting relocation_count = 0
> +    Submit execbuffer
> +    Shared buffer will be pinned to previous address of gem object
> +    Unshared buffer will be evicted, since relocation is not allowed
> +    Second batch buffer will write 0x11111111 to shared buffer instead of unshared
> +    Verify shared buffer contains 0x11111111
> +    Reverse order of instructions in batch buffer to write to unshared first
> +@endcode
> +
> +**/
> +
> +static void gem_evict_test(void)
> +{
> +	i915_gem_userptr* userptr = NULL;
> +	int fd, ret;
> +	uint32_t* shared_buffer = NULL;
> +	struct drm_i915_gem_relocation_entry reloc[4];
> +	struct drm_i915_gem_execbuffer2 execbuf;
> +	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS + 1];
> +	uint32_t batch_buffer[STORE_BATCH_BUFFER_SIZE * 2];
> +	uint32_t batch_buf_handle, shared_buf_handle, unshared_buf_handle;
> +	int ring, len;
> +
> +	fd = drm_open_driver(DRIVER_INTEL);
> +	batch_buf_handle = gem_create(fd, BO_SIZE);
> +	unshared_buf_handle = gem_create(fd, BO_SIZE);
> +
> +	shared_buffer = gem_create_mem_buffer(BO_SIZE);
> +	*shared_buffer = 0xFFFFFFFF;
> +
> +	// share with GPU
> +	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
> +	ret = gem_call_userptr_ioctl(fd, userptr);
> +	igt_assert_eq(ret, 0);
> +
> +	// Get handle for shared buffer
> +	shared_buf_handle = userptr->handle;
> +	free(userptr);
> +
> +	// create command buffer with write commands
> +	len = gem_store_data(fd, batch_buffer, unshared_buf_handle, 0x11111111, reloc, false);
> +	len += gem_store_data_svm(fd, batch_buffer + (len/4), NULL, 0x22222222, true);
> +	igt_assert_lte(len, STORE_BATCH_BUFFER_SIZE * 2 * 4);

Elsewhere you use sizeof so these times four stick out :)

Btw, batch_buffer + (len/4) will be batch_buffer + (16/4), right? That 
will write out the second batch at batch_buffer[16] while it should be 
at batch_buffer[4], no?

> +	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +	// submit command buffer
> +	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, 0);
> +	setup_exec_obj(&exec_object2[1], unshared_buf_handle, 0, 0);
> +	setup_exec_obj(&exec_object2[2], batch_buf_handle, 0, 0);
> +
> +	exec_object2[2].relocation_count = 1;
> +	exec_object2[2].relocs_ptr = (uintptr_t)reloc;
> +
> +	ring = 0;
> +	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +		ring = I915_EXEC_BLT;
> +
> +	execbuf.buffers_ptr = (uintptr_t)exec_object2;
> +	execbuf.buffer_count = NUM_EXEC_OBJECTS + 1;
> +	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, batch_buf_handle);
 >
> +	igt_assert(*shared_buffer == 0x22222222);

You could check also unshared_buffer for 0x11111111 at this point, right?

> +	*shared_buffer = 0xffffffff;
> +	// Now cause eviction of unshared buffer by pinning shared buffer there
> +	exec_object2[0].offset = exec_object2[1].offset;
> +	// Prevent relocation
> +	exec_object2[2].relocation_count = 0;

What happens to the first store data now? It writes to the previously 
resolved address which is now where the shared buf VMA is?

And the second data store still writes to zero GTT address where there 
is nothing now? Why is this not bad?

> +
> +	gem_execbuf(fd, &execbuf);
> +	gem_sync(fd, batch_buf_handle);
> +	igt_assert(*shared_buffer == 0x11111111);
> +	igt_assert(exec_object2[0].offset != exec_object2[1].offset);
> +
> +	// Now lets do it again with the objects listed in reverse order...
> +	*shared_buffer = 0xffffffff;
> +	setup_exec_obj(&exec_object2[0], unshared_buf_handle, 0, 0);
> +	setup_exec_obj(&exec_object2[1], shared_buf_handle, EXEC_OBJECT_PINNED, 0);
> +	exec_object2[2].relocation_count = 1;
> +	gem_execbuf(fd, &execbuf);
> +	gem_sync(fd, batch_buf_handle);
> +	igt_assert(*shared_buffer == 0x22222222);
> +	*shared_buffer = 0xffffffff;
> +	// Now cause eviction of unshared buffer by pinning shared buffer there
> +	exec_object2[1].offset = exec_object2[0].offset;
> +	// Prevent relocation
> +	exec_object2[2].relocation_count = 0;
> +
> +	gem_execbuf(fd, &execbuf);
> +	gem_sync(fd, batch_buf_handle);
> +	igt_assert(*shared_buffer == 0x11111111);
> +	igt_assert(exec_object2[0].offset != exec_object2[1].offset);
> +
> +	gem_close(fd, batch_buf_handle);
> +	close(fd);
> +
> +	free(shared_buffer);
> +}
> +
> +/** gem_stress_test - Stress test which creates 10K buffers and shares with GPU
> +@code
> +   Create 10K uint32 buffers of size 4K each
> +   Share with GPU using userptr ioctl
> +   Create batch buffer to write DATA in first element of each buffer
> +   Execute Batch Buffer on Blit ring STRESS_NUM_LOOPS times
> +   Validate every buffer has DATA in first element
> +   Repeat on Render ring
> +@endcode
> +**/
> +#define STRESS_NUM_BUFFERS 10240
> +#define STRESS_NUM_LOOPS 1000
> +
> +static void gem_stress_test(void)
> +{
> +	i915_gem_userptr* userptr = NULL;
> +	int fd, ret;
> +	uint32_t* shared_buffer[STRESS_NUM_BUFFERS];
> +	uint32_t shared_handle[STRESS_NUM_BUFFERS];
> +	struct drm_i915_gem_execbuffer2 execbuf;
> +	struct drm_i915_gem_exec_object2 exec_object2[STRESS_NUM_BUFFERS + 1];
> +	uint32_t batch_buffer[4*STRESS_NUM_BUFFERS + 2];

Maybe replace this 4 with a define.

> +	uint32_t batch_buf_handle;
> +	int ring, len, i, j;

loop and bo instead of i and j would be more readable.

> +
> +	fd = drm_open_driver(DRIVER_INTEL);
> +	batch_buf_handle = gem_create(fd, sizeof(batch_buffer));
> +
> +	// create command buffer with write commands
> +	len = 0;
> +	for(i = 0; i < STRESS_NUM_BUFFERS; i++)
> +	{
> +		shared_buffer[i] = gem_create_mem_buffer(BO_SIZE);
> +		*shared_buffer[i] = 0xFFFFFFFF;
> +
> +		// share with GPU
> +		userptr = gem_create_userptr_struct(shared_buffer[i], BO_SIZE, 0);
> +		ret = gem_call_userptr_ioctl(fd, userptr);
> +		igt_assert_eq(ret, 0);
> +
> +		// Get handle for shared buffer
> +		shared_handle[i] = userptr->handle;
> +		free(userptr);
> +
> +		setup_exec_obj(&exec_object2[i], shared_handle[i], EXEC_OBJECT_PINNED, shared_buffer[i]);
> +		len += gem_store_data_svm(fd, batch_buffer + (len/4), shared_buffer[i], i , (i == STRESS_NUM_BUFFERS-1) ? true:false);
> +	}
> +	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +	// submit command buffer
> +
> +	exec_object2[STRESS_NUM_BUFFERS].handle = batch_buf_handle;
> +	exec_object2[STRESS_NUM_BUFFERS].relocation_count = 0;
> +	exec_object2[STRESS_NUM_BUFFERS].relocs_ptr = 0;
> +	exec_object2[STRESS_NUM_BUFFERS].alignment = 0;
> +	exec_object2[STRESS_NUM_BUFFERS].offset = 0;
> +	exec_object2[STRESS_NUM_BUFFERS].flags = 0;
> +	exec_object2[STRESS_NUM_BUFFERS].rsvd1 = 0;
> +	exec_object2[STRESS_NUM_BUFFERS].rsvd2 = 0;
> +
> +	ring = 0;
> +	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +		ring = I915_EXEC_BLT;
> +
> +	execbuf.buffers_ptr = (uintptr_t)exec_object2;
> +	execbuf.buffer_count = STRESS_NUM_BUFFERS + 1;
> +	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;
> +
> +	for (i = 0; i < STRESS_NUM_LOOPS; i++)
> +	{
> +		gem_execbuf(fd, &execbuf);
> +		gem_sync(fd, batch_buf_handle);
> +		for(j = 0; j < STRESS_NUM_BUFFERS; j++)
> +		{
> +			igt_fail_on_f(*shared_buffer[j] != j,
> +				      "Mismatch in object %d, iteration %d: 0x%08X\n", j, i, *shared_buffer[j]);
> +			*shared_buffer[j] = (j<<2)+1;

Whats this write for?

> +		}
> +	}
> +
> +	// Now Render Ring
> +	ring = I915_EXEC_BLT;

Blitter again. :)

> +	execbuf.flags = ring;
> +	for (i = 0; i < STRESS_NUM_LOOPS; i++)
> +	{
> +		gem_execbuf(fd, &execbuf);
> +		gem_sync(fd, batch_buf_handle);
> +		for(j = 0; j < STRESS_NUM_BUFFERS; j++)
> +		{
> +			igt_fail_on_f(*shared_buffer[j] != j,
> +				      "Mismatch in object %d, iteration %d: 0x%08X\n", j, i, *shared_buffer[j]);
> +			*shared_buffer[j] = (j<<2)+1;
> +		}
> +	}
> +
> +	gem_close(fd, batch_buf_handle);
> +	close(fd);
> +
> +	for(i = 0; i < STRESS_NUM_BUFFERS; i++)
> +	{
> +		free(shared_buffer[i]);
> +	}
> +}
> +
> +#define STRESS2_NUM_BUFFERS 1
> +#define STRESS2_NUM_LOOPS 256
> +
> +/** gem_write_multipage_buffer - Create a buffer spanning multiple
> +    pages, and share with GPU. Write to every element of the buffer
> +    and verify correct contents.
> +
> +@code
> +   Create 16K uint32 buffer
> +   Share with GPU using userptr ioctl
> +   Create batch buffer to write DATA in all elements of buffer
> +   Execute Batch Buffer
> +   Validate every element has DATA
> +@endcode
> +**/
> +static void gem_write_multipage_buffer_test(void)
> +{
> +	i915_gem_userptr* userptr = NULL;
> +	int fd, ret;
> +	uint32_t* shared_buffer;
> +	uint32_t shared_handle;
> +	struct drm_i915_gem_execbuffer2 execbuf;
> +	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
> +	uint32_t batch_buffer[(4 * BO_SIZE) + 2];
> +	uint32_t batch_buf_handle;
> +	int ring, len, i, j;
> +
> +	fd = drm_open_driver(DRIVER_INTEL);
> +	batch_buf_handle = gem_create(fd, sizeof(batch_buffer));
> +
> +	/* create command buffer with write commands */
> +	len = 0;
> +	shared_buffer = gem_create_mem_buffer(BO_SIZE * 4);

It is confusing to use BO_SIZE and hardcoded four here.

> +	memset(batch_buffer, 0, sizeof(batch_buffer));
> +
> +	for(i = 0; i< BO_SIZE; i++)
> +	{
> +		shared_buffer[i] = 0;
> +	}
> +

So a memset? :)

> +	/* share with GPU */
> +	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE * 4, 0);
> +	ret = gem_call_userptr_ioctl(fd, userptr);
> +	igt_assert_eq(ret, 0);
> +
> +	/* Get handle for shared buffer */
> +	shared_handle = userptr->handle;
> +	free(userptr);
> +
> +	setup_exec_obj(&exec_object2[0], shared_handle, EXEC_OBJECT_PINNED, shared_buffer);
> +
> +	for(j=0; j< (BO_SIZE); j++)
> +	{
> +		len += gem_store_data_svm(fd, batch_buffer + (len/4), &shared_buffer[j], j, (j == ((BO_SIZE)-1)) ? true:false);
> +	}
> +	
> +	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +	// submit command buffer
> +	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
> +
> +	ring = 0;
> +	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +		ring = I915_EXEC_BLT;
> +
> +	execbuf.buffers_ptr = (uintptr_t)exec_object2;
> +	execbuf.buffer_count = NUM_EXEC_OBJECTS;
> +	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, batch_buf_handle);
> +	for(j = 0; j < (BO_SIZE); j++)
> +	{
> +		igt_fail_on_f(shared_buffer[j] != j,
> +			      "Mismatch in object %d: 0x%08X\n", j, shared_buffer[j]);

s/in object/at offset/ ?

> +	}
> +
> +	gem_close(fd, batch_buf_handle);
> +	close(fd);
> +
> +	free(shared_buffer);
> +}
> +
> +/** This test will request to pin a shared buffer to an invalid
> +    VMA  > 48-bit address
> +
> +   Create shared buffer of size 4K
> +   Try and Pin object to address 0x9000000000000
> +**/
> +static void gem_pin_invalid_vma_test(void)
> +{
> +	i915_gem_userptr* userptr = NULL;
> +	int fd, ret;
> +	uint32_t* shared_buffer = NULL;
> +	struct drm_i915_gem_execbuffer2 execbuf;
> +	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
> +	uint32_t batch_buffer[BO_SIZE];
> +	uint32_t batch_buf_handle, shared_buf_handle;
> +	int ring, len;
> +	const uint32_t data = 0x12345678;
> +	uint32_t* invalid_address = (uint32_t*)0x9000000000000;

Should be uint64_t I think, not a pointer to uint32_t.

That way it can even run on 32-bit userspace.

> +
> +	fd = drm_open_driver(DRIVER_INTEL);
> +	batch_buf_handle = gem_create(fd, BO_SIZE);
> +
> +	shared_buffer = gem_create_mem_buffer(BO_SIZE);
> +	*shared_buffer = 0xFFFFFFFF;
> +	
> +	// share with GPU
> +	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
> +	ret = gem_call_userptr_ioctl(fd, userptr);
> +	igt_assert_eq(ret, 0);
> +
> +	shared_buf_handle = userptr->handle;
> +	free(userptr);
> +
> +	len = gem_store_data_svm(fd, batch_buffer, shared_buffer, data, true);
> +	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, invalid_address);
> +	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
> +
> +	ring = 0;
> +	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +		ring = I915_EXEC_BLT;
> +
> +	execbuf.buffers_ptr = (uintptr_t)exec_object2;
> +	execbuf.buffer_count = NUM_EXEC_OBJECTS;
> +	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;
> +
> +	/* Expect execbuf to fail */
> +	ret = drmIoctl(fd,
> +	       DRM_IOCTL_I915_GEM_EXECBUFFER2,
> +	       &execbuf);
> +
> +	igt_assert_neq(ret, 0);
> +	
> +	gem_sync(fd, batch_buf_handle);
> +	gem_close(fd, batch_buf_handle);
> +	close(fd);
> +
> +	free(shared_buffer);
> +}
> +
> +#define SHM_KEY 56789
> +#define SHMEM_SIZE 4096
> +/** gem_shmem_svm_test - Test userptr ioctl with shared memory
> + * This test creates a sysV IPC buffer and shares with GPU.
> + * It will send GPU commands to write DATA in the buffer and
> + * validate it on the CPU side when the command completes.
> +
> + * Create arbitrary shmem id
> + * Use shmat to attach a 4K uint32 buffer to above id
> + * Share buffer with GPU using userptr ioctl
> + * Create Batch buffer to write DATA in the first element
> + * submit execbuffer
> + * Validate on CPU side that DATA was indeed written
> + */
> +static void gem_shmem_test(void)
> +{
> +	int shmid;
> +	i915_gem_userptr* userptr = NULL;
> +	int fd, ret;
> +	uint32_t* shared_buffer = NULL;
> +	struct drm_i915_gem_execbuffer2 execbuf;
> +	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
> +	uint32_t batch_buffer[BO_SIZE];
> +	uint32_t batch_buf_handle, shared_buf_handle;
> +	int ring, len;
> +	const uint32_t data = 0x12345678;
> +
> +	shmid = shmget(SHM_KEY, SHMEM_SIZE, IPC_CREAT);
> +	igt_assert_neq(shmid, -1);
> +
> +	shared_buffer = shmat(shmid, NULL, 0);	
> +	igt_assert(shared_buffer != (void*)-1);
> +
> +	memset(shared_buffer, 0, SHMEM_SIZE);
> +	shared_buffer[0] = 0xFFFFFFFF;
> +
> +	fd = drm_open_driver(DRIVER_INTEL);
> +	batch_buf_handle = gem_create(fd, BO_SIZE);
> +
> +	userptr = gem_create_userptr_struct(shared_buffer, SHMEM_SIZE, 0);
> +	ret = gem_call_userptr_ioctl(fd, userptr);
> +	igt_assert_eq(ret, 0);
> +
> +	shared_buf_handle = userptr->handle;
> +	free(userptr);
> +	
> +	/* create command buffer with write command */
> +	len = gem_store_data_svm(fd, batch_buffer, shared_buffer, data, true);
> +	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +	/* submit command buffer */
> +	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, shared_buffer);
> +	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
> +
> +	ring = 0;
> +	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +		ring = I915_EXEC_BLT;
> +
> +	execbuf.buffers_ptr = (uintptr_t)exec_object2;
> +	execbuf.buffer_count = NUM_EXEC_OBJECTS;
> +	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, batch_buf_handle);
> +
> +	gem_close(fd, batch_buf_handle);
> +	close(fd);
> +
> +	/* check on CPU to see if value changes */
> +	igt_fail_on_f(shared_buffer[0] != data,
> +		      "\nCPU read does not match GPU write, expected: 0x%x, got: 0x%x\n", data, shared_buffer[0]);
> +
> +	ret = shmdt(shared_buffer);
> +	igt_assert_eq(ret, 0);
> +
> +}
> +
> +/** gem_pin_high_address_test - This test will create a shared buffer, and create a command
> + *  for GPU to write data in it. It will attempt to pin the buffer at address > 32 bits.
> + *  CPU will read and make sure expected value is obtained
> +
> +@code
> +   Malloc a 4K buffer
> +   Share buffer with with GPU by using userptr ioctl
> +   Create batch buffer to write DATA to first dword of buffer
> +   Use virtual address of buffer as 0x1100000000 (> 32 bit)
> +   Set EXEC_OBJECT_PINNED flag in exec object
> +   Set 'offset' in exec object to shared buffer VMA
> +   Submit execbuffer
> +   Verify value of first DWORD in shared buffer matches DATA
> +@endcode
> +*/
> +
> +static void gem_pin_high_address_test(void)
> +{
> +	i915_gem_userptr* userptr = NULL;
> +	int fd, ret;
> +	uint32_t* shared_buffer = NULL;
> +	struct drm_i915_gem_execbuffer2 execbuf;
> +	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
> +	uint32_t batch_buffer[BO_SIZE];
> +	uint32_t batch_buf_handle, shared_buf_handle;
> +	int ring, len;
> +	const uint32_t data = 0x12345678;
> +        uint32_t* high_address = (uint32_t*)0x1111FFFF000;

Strictly speaking you don't need userptr for this test, especially since 
you are not trying to share the address. And you even can't on 32-bit 
userspace.

But even if you keep it using userptr you can make it work on 32-bit 
userspace as I described in the previous test.

> +
> +	fd = drm_open_driver(DRIVER_INTEL);
> +	batch_buf_handle = gem_create(fd, BO_SIZE);
> +
> +	/* create cpu buffer, set to all 0xF's */
> +	shared_buffer = gem_create_mem_buffer(BO_SIZE);
> +	*shared_buffer = 0xFFFFFFFF;
> +
> +	/* share with GPU */
> +	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
> +	ret = gem_call_userptr_ioctl(fd, userptr);
> +	igt_assert_eq(ret, 0);
> +
> +	/* Get handle for shared buffer */
> +	shared_buf_handle = userptr->handle;
> +	free(userptr);
> +
> +	/* create command buffer with write command */
> +	len = gem_store_data_svm(fd, batch_buffer, high_address, data, true);
> +	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +	/* submit command buffer */
> +	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED | EXEC_OBJECT_SUPPORTS_48B_ADDRESS, high_address);
> +	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
> +
> +	ring = 0;
> +	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +		ring = I915_EXEC_BLT;
> +
> +	execbuf.buffers_ptr = (uintptr_t)exec_object2;
> +	execbuf.buffer_count = NUM_EXEC_OBJECTS;
> +	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, batch_buf_handle);
> +
> +	// check on CPU to see if value changes

Too much C++ style comments.

> +	igt_fail_on_f(shared_buffer[0] != data,
> +		      "\nCPU read does not match GPU write, expected: 0x%x, got: 0x%x\n", data, shared_buffer[0]);
> +
> +	gem_close(fd, batch_buf_handle);
> +	close(fd);
> +	free(shared_buffer);
> +}
> +
> +/** gem_pin_near_48Bit_test - This test will create a shared buffer, and create a command
> + *  for GPU to write data in it. It will attempt to pin the buffer at address > 47 bits <= 48-bit.
> + *  CPU will read and make sure expected value is obtained
> +
> +@code
> +   Malloc a 4K buffer
> +   Share buffer with with GPU by using userptr ioctl
> +   Create batch buffer to write DATA to first dword of buffer
> +   Use virtual address of buffer as range between 47-bit and 48-bit
> +   Set EXEC_OBJECT_PINNED flag in exec object
> +   Set 'offset' in exec object to shared buffer VMA
> +   Submit execbuffer
> +   Verify value of first DWORD in shared buffer matches DATA
> +@endcode
> +*/
> +#define BEGIN_HIGH_ADDRESS 0x7FFFFFFFF000
> +#define END_HIGH_ADDRESS 0xFFFFFFFFC000
> +#define ADDRESS_INCREMENT 0x2000000000
> +static void gem_pin_near_48Bit_test(void)
> +{
> +	i915_gem_userptr* userptr = NULL;
> +	int fd, ret;
> +	uint32_t* shared_buffer = NULL;
> +	struct drm_i915_gem_execbuffer2 execbuf;
> +	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
> +	uint32_t batch_buffer[BO_SIZE];
> +	uint32_t batch_buf_handle, shared_buf_handle;
> +	int ring, len;
> +	const uint32_t data = 0x12345678;
> +        uint32_t* high_address;

Weird indentation.

> +
> +	fd = drm_open_driver(DRIVER_INTEL);
> +	batch_buf_handle = gem_create(fd, BO_SIZE);
> +
> +	/* create cpu buffer, set to all 0xF's */
> +	shared_buffer = gem_create_mem_buffer(BO_SIZE);
> +	*shared_buffer = 0xFFFFFFFF;
> +
> +	/* share with GPU */
> +	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
> +	ret = gem_call_userptr_ioctl(fd, userptr);
> +	igt_assert_eq(ret, 0);
> +
> +	/* Get handle for shared buffer */
> +	shared_buf_handle = userptr->handle;
> +	free(userptr);
> +
> +	for (high_address = (uint32_t*)BEGIN_HIGH_ADDRESS; high_address <= (uint32_t*)END_HIGH_ADDRESS;
> +						high_address+=ADDRESS_INCREMENT)
> +	{
> +		/* create command buffer with write command */
> +		len = gem_store_data_svm(fd, batch_buffer, (uint32_t*)high_address,
> +					data, true);
> +		gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +		/* submit command buffer */
> +		setup_exec_obj(&exec_object2[0], shared_buf_handle,
> +				EXEC_OBJECT_PINNED | EXEC_OBJECT_SUPPORTS_48B_ADDRESS,
> +				high_address);

Again doesn't need userptr and can be made to work on 32-bit userspace.

> +		setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
> +
> +		ring = 0;
> +		if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +			ring = I915_EXEC_BLT;
> +
> +		execbuf.buffers_ptr = (uintptr_t)exec_object2;
> +		execbuf.buffer_count = NUM_EXEC_OBJECTS;
> +		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, batch_buf_handle);
> +
> +		// check on CPU to see if value changes
> +		if (shared_buffer[0] != data)
> +		{
> +			#ifdef IS_32BIT_USER
> +			igt_info("\nCPU read does not match GPU write, expected: 0x%"PRIx32", got: 0x%"PRIx32", address: 0x%"PRIx32"\n", data, shared_buffer[0], (uintptr_t)high_address);
> +			#else
> +			igt_info("\nCPU read does not match GPU write, expected: 0x%"PRIx32", got: 0x%"PRIx32", address: 0x%"PRIx64"\n", data, shared_buffer[0], (uintptr_t)high_address);
> +			#endif

I think if you make high_address uint64_t this can be simplified.

> +			igt_fail(1);
> +		}
> +	}
> +
> +	gem_close(fd, batch_buf_handle);
> +	close(fd);
> +	free(shared_buffer);
> +}
> +
> +/** gem_pin_mmap_anonymous_test - This test will create a mmap anonymous buffer and
> + *  share with GPU. It will run basic test on this buffer.

This is unusual comment format, not consistent with the code base.

> +@code
> +   Create a anonymous mmap buffer
> +   Share buffer with with GPU by using userptr ioctl
> +   Create batch buffer to write DATA to first dword of buffer
> +   Set EXEC_OBJECT_PINNED flag in exec object
> +   Set 'offset' in exec object to shared buffer VMA
> +   Submit execbuffer
> +   Verify value of first DWORD in shared buffer matches DATA
> +@endcode
> +*/
> +void gem_pin_mmap_anonymous_test(void)
> +{
> +	i915_gem_userptr* userptr = NULL;
> +	int fd, ret;
> +	uint32_t* shared_buffer = NULL;
> +	struct drm_i915_gem_execbuffer2 execbuf;
> +	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
> +	uint32_t batch_buffer[BO_SIZE];
> +	uint32_t batch_buf_handle, shared_buf_handle;
> +	int ring, len;
> +	const uint32_t data = 0x12345678;
> +
> +	fd = drm_open_driver(DRIVER_INTEL);
> +	batch_buf_handle = gem_create(fd, BO_SIZE);
> +
> +	/* create anonymus mmap buffer, set to all 0xF's */
> +	shared_buffer = mmap(NULL, BO_SIZE, PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
> +	igt_fail_on_f(shared_buffer == (void *)-1,
> +		      "mmap call failed with %s\n", strerror(errno));

MAP_FAILED

> +
> +	*shared_buffer = 0xFFFFFFFF;
> +
> +	/* share with GPU */
> +	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
> +	ret = gem_call_userptr_ioctl(fd, userptr);
> +	igt_assert_eq(ret, 0);
> +
> +	/* Get handle for shared buffer */
> +	shared_buf_handle = userptr->handle;
> +	free(userptr);
> +
> +	/* create command buffer with write command */
> +	len = gem_store_data_svm(fd, batch_buffer, shared_buffer, data, true);
> +	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +	/* submit command buffer */
> +	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, shared_buffer);
> +	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
> +
> +	ring = 0;
> +	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +		ring = I915_EXEC_BLT;
> +
> +	execbuf.buffers_ptr = (uintptr_t)exec_object2;
> +	execbuf.buffer_count = NUM_EXEC_OBJECTS;
> +	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, batch_buf_handle);
> +
> +	// check on CPU to see if value changes
> +	igt_fail_on_f(shared_buffer[0] != data,
> +		      "\nCPU read does not match GPU write, expected: 0x%x, got: 0x%x\n", data, shared_buffer[0]);
> +
> +	gem_close(fd, batch_buf_handle);
> +	close(fd);
> +	igt_fail_on_f(munmap(shared_buffer, BO_SIZE) != 0,
> +		      "munmap failed with: %s", strerror(errno));
> +}

Ok so you got three tests I can think of which do the same thing just 
with a different type of memory used. Maybe you could reduce code 
duplication a bit, but perhaps, if you implement the other suggestions 
they will become really short anyway. Probably the latter.

More importantly userptr backing memory types are not directly related 
to the softpin feature. I would be tempted to add these to 
gem_userptr_blits (malloced, shm, anon mmap) and not bother with that here.

> +
> +/** gem_pin_mmap_file_test - This test will use mmap command to map
> + *  a file in memory. It will then attempt to share the buffer with GPU
> + *  using the userptr ioctl. It will verify if CPU/GPU writes are consistent
> +
> +@code
> +   open/create a file
> +   lseek into the file and write some arbitrary data
> +   this allows the mmap'd page to become resident
> +   use mmap command to map the file into memory
> +   Share buffer with with GPU by using userptr ioctl
> +   Create batch buffer to write DATA to first dword of buffer
> +   Set EXEC_OBJECT_PINNED flag in exec object
> +   Set 'offset' in exec object to shared buffer VMA
> +   Submit execbuffer
> +   Verify value of first DWORD in shared buffer matches DATA
> +   Close file
> +@endcode
> +*/
> +void gem_pin_mmap_file_test(void)
> +{
> +	i915_gem_userptr* userptr = NULL;
> +	int fd, ret;
> +	struct drm_i915_gem_execbuffer2 execbuf;
> +	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
> +	uint32_t batch_buffer[BO_SIZE];
> +	uint32_t batch_buf_handle, dest_buf_handle;
> +	int ring, len;
> +	const uint32_t data = 0x12345678;
> +        int fdout;
> +	uint32_t *dest;
> +	const char filename[] = "svm_mmap.txt";
> +
> +	fdout = open(filename, O_RDWR | O_CREAT | O_TRUNC, 0640);
> +	igt_fail_on_f(fdout < 0, "Cannot open output file\n");

I am not sure if this is acceptable in IGT. Probably at least have to 
use /tmp rather than whatever current directory is.

But also is not about soft pinning so previous comment applies.

> +
> +	// Do this to ensure backing physical memory for the file
> +	/* go to the location corresponding to the last byte */
> +	if (lseek (fdout, BO_SIZE, SEEK_SET) == -1)
> +		igt_info("lseek error");
> +
> +	/* write a dummy byte at the last location */
> +	if (write (fdout, "", 1) != 1)
> +		igt_info("write error");
> +
> +	fd = drm_open_driver(DRIVER_INTEL);
> +	batch_buf_handle = gem_create(fd, BO_SIZE);
> +
> +	/* create anonymus mmap buffer, set to all 0xF's */
> +	dest = mmap(0, BO_SIZE, PROT_WRITE, MAP_SHARED, fdout, 0);
> +	igt_fail_on_f(dest == (void *)-1,
> +		      "mmap call failed with %s\n", strerror(errno));
> +	*dest = 0x11111111;
> +
> +	userptr = gem_create_userptr_struct(dest, BO_SIZE, 0);
> +	ret = gem_call_userptr_ioctl(fd, userptr);
> +	igt_assert_eq(ret, 0);
> +	dest_buf_handle = userptr->handle;
> +	free(userptr);
> +
> +	/* create command buffer with write command */
> +	len = gem_store_data_svm(fd, batch_buffer, dest, data, true);
> +	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
> +
> +	/* submit command buffer */
> +	setup_exec_obj(&exec_object2[0], dest_buf_handle, EXEC_OBJECT_PINNED, dest);
> +	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
> +
> +	ring = 0;
> +	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
> +		ring = I915_EXEC_RENDER;
> +
> +	execbuf.buffers_ptr = (uintptr_t)exec_object2;
> +	execbuf.buffer_count = NUM_EXEC_OBJECTS;
> +	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, batch_buf_handle);
> +
> +	// check on CPU to see if value changes
> +	igt_fail_on_f(*dest != data,
> +		      "\nCPU read does not match GPU write, expected: 0x%x, got: 0x%x\n", data, dest[0]);
> +
> +	gem_close(fd, batch_buf_handle);
> +	close(fd);
> +	igt_fail_on_f(munmap(dest, BO_SIZE) != 0,
> +		      "munmap failed with: %s", strerror(errno));
> +	close(fdout);
> +}
> +
> +
> +int main(int argc, char* argv[])
> +{
> +	igt_subtest_init(argc, argv);
> +	igt_skip_on_simulation();
> +
> +	igt_subtest("gem_null_buffer"){
> +		gem_basic_test(false);
> +	}
> +	igt_subtest("gem_invalid_userptr"){
> +		gem_invalid_userptr_test();
> +	}
> +	igt_subtest("gem_basic"){
> +		gem_basic_test(true);
> +	}
> +	igt_subtest("gem_multiple_process"){
> +		gem_multiple_process_test();
> +	}
> +	igt_subtest("gem_repin"){
> +		gem_repin_test();
> +	}
> +	igt_subtest("gem_evict"){
> +		gem_evict_test();
> +	}
> +	igt_subtest("gem_stress"){
> +		gem_stress_test();
> +	}
> +	igt_subtest("gem_pin_overlap"){
> +		gem_pin_overlap_test();
> +	}
> +	igt_subtest("gem_shmem"){
> +		gem_shmem_test();
> +	}
> +	igt_subtest("gem_write_multipage_buffer"){
> +		gem_write_multipage_buffer_test();
> +	}
> +#ifndef IS_32BIT_USER
> +	igt_subtest("gem_pin_high_address"){
> +		gem_pin_high_address_test();
> +	}
> +	igt_subtest("gem_pin_near_48Bit"){
> +		gem_pin_near_48Bit_test();
> +	}
> +	igt_subtest("gem_pin_invalid_vma"){
> +		gem_pin_invalid_vma_test();
> +	}
> +#endif

So I think all of those can be implemented to work on 32-bit userspace 
as commented above.

In general quite some amount of code so I don't guarantee I caught all 
problems.

I think removing some tests is the way to go by adding new test cases to 
gem_userptr_blits. They would not use soft pinning there but jsut 
excercise backing store.

In this file you can keep using userptr but you have to also excercise 
the normal BO a bit.

When you clean it up it will become clearer if any test scenarios are 
missing.

For places where I made comments on data types and coding styles they 
obviously apply throughout.

Regards,

Tvrtko

Patch

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 8fb2de8..2ce4216 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -11,6 +11,7 @@  TESTS_progs_M = \
 	drv_hangman \
 	gem_bad_reloc \
 	gem_basic \
+	gem_buffered_svm_test \
 	gem_caching \
 	gem_close_race \
 	gem_concurrent_blit \
diff --git a/tests/gem_buffered_svm_test.c b/tests/gem_buffered_svm_test.c
new file mode 100644
index 0000000..44d342a
--- /dev/null
+++ b/tests/gem_buffered_svm_test.c
@@ -0,0 +1,1490 @@ 
+/*
+ * Copyright © 2015 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:
+ *    Vinay Belgaumkar <[e-mail]?
+      Thomas Daniel <[e-mail]>
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.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 <sys/time.h>
+#include <malloc.h>
+#include "drm.h"
+#include "ioctl_wrappers.h"
+#include "drmtest.h"
+#include "intel_chipset.h"
+#include "intel_io.h"
+#include "i915_drm.h"
+#include <assert.h>
+#include <sys/wait.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include "igt_kms.h"
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+
+#if (INTPTR_MAX == INT32_MAX)
+	#define IS_32BIT_USER
+#endif
+
+#define OBJECT_SIZE 16384
+#define BO_SIZE 4 * 4096
+#define STORE_BATCH_BUFFER_SIZE 6
+#define STRESS_BATCH_BUFFER_SIZE 5
+#define EXEC_OBJECT_PINNED	(1<<4)
+#define EXEC_OBJECT_SUPPORTS_48B_ADDRESS (1<<3)
+#define SHARED_BUFFER_SIZE 4096
+#define NUM_EXEC_OBJECTS 2
+
+typedef struct drm_i915_gem_userptr i915_gem_userptr;
+static i915_gem_userptr* gem_create_userptr_struct(void* ptr, int size, int read_only);
+
+static void* gem_create_mem_buffer(int size);
+static void gem_invalid_userptr_test(void);
+static int gem_call_userptr_ioctl(int fd, i915_gem_userptr* userptr);
+static void gem_basic_test(bool);
+static void gem_pin_invalid_vma_test(void);
+static void gem_pin_overlap_test(void);
+static void gem_shmem_test(void);
+static void gem_pin_high_address_test(void);
+static void gem_pin_mmap_anonymous_test(void);
+static void gem_pin_mmap_file_test(void);
+
+/* incorrect args to userptr ioctl
+   - Write to Read Only buffer
+*/
+
+static int gem_call_userptr_ioctl(int fd, i915_gem_userptr* userptr)
+{
+	int ret;
+
+	ret = drmIoctl(fd, DRM_IOCTL_I915_GEM_USERPTR, userptr);
+
+	if (ret)
+		ret = errno;
+
+	return ret;
+}
+
+static i915_gem_userptr* gem_create_userptr_struct(void* ptr, int size, int read_only)
+{
+	i915_gem_userptr* userptr;
+
+	userptr = (i915_gem_userptr*)calloc(1, sizeof(i915_gem_userptr));
+
+	igt_assert(userptr != NULL);
+
+	if (userptr)
+	{
+		userptr->user_ptr = (uintptr_t)ptr;
+		userptr->user_size = size;
+		userptr->flags = I915_USERPTR_UNSYNCHRONIZED;
+
+		if (read_only)
+			userptr->flags |= I915_USERPTR_READ_ONLY;
+	}
+
+	return userptr;
+}
+
+
+
+/** Creates a CPU buffer 
+ *  @size - size of buffer
+ *  RETURNS pointer to buffer of @size
+*/
+
+static void* gem_create_mem_buffer(int size)
+{
+	void* addr;
+
+	addr = memalign(4096, size);
+	igt_assert(addr != NULL);
+
+	return addr;
+}
+
+/**
+ * This test will send an invalid userptr struct to the ioctl
+ * Expected result is ioctl call should return FAILURE
+*/
+static void gem_invalid_userptr_test(void)
+{
+	i915_gem_userptr* userptr = NULL;
+	int fd, ret;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+
+	ret = gem_call_userptr_ioctl(fd, userptr);
+
+	/* Expect to fail */
+	igt_assert(ret);
+}
+
+/** setup_exec_obj - populate exec object
+ * @exec - exec object
+ * @handle - handle to gem buffer
+ * flags - any flags
+ * offset - requested VMA
+ */
+static void setup_exec_obj(struct drm_i915_gem_exec_object2 *exec, __u32 handle, __u32 flags, uint32_t* offset)
+{
+	memset(exec, 0, sizeof(struct drm_i915_gem_exec_object2));
+	exec->handle = handle;
+	exec->flags = flags;
+	exec->offset = (uintptr_t)offset;
+}
+
+/** 
+ * gem_store_data_svm - populate batch buffer with MI_STORE_DATA_IMM command
+ * @fd: drm file descriptor
+ * @buf: batch buffer
+ * @buffer_size: size of buffer
+ * @addr: destination Virtual address
+ * @data: data to be store at destination
+ * @end: whether to end batch buffer or not
+ */
+#define MI_COMMAND 0
+#define MI_STORE_DATA_IMM 0x20 << 23
+#define USE_PPGTT 0x0 << 22
+#define DWORD_LENGTH 0x2
+static int gem_store_data_svm(int fd, uint32_t* cmd_buf, uint32_t* vaddr,
+			      uint32_t data, bool end)
+{
+	int i = 0;
+
+	cmd_buf[i++] = MI_COMMAND | MI_STORE_DATA_IMM | USE_PPGTT | DWORD_LENGTH;
+	cmd_buf[i++] = (uintptr_t)vaddr & 0xFFFFFFFC;
+	#ifdef IS_32BIT_USER
+		cmd_buf[i++] = 0;
+	#else // 64 bit
+		cmd_buf[i++] = ((uintptr_t)vaddr >> 32) & 0xFFFF; /* bits 32:47 */
+	#endif
+
+	cmd_buf[i++] = data;
+	if (end) 
+	{
+		cmd_buf[i++] = MI_BATCH_BUFFER_END;
+		cmd_buf[i++] = 0;
+	}
+
+	return (i * sizeof(uint32_t));
+}
+
+/** 
+ * gem_store_data_svm - populate batch buffer with MI_STORE_DATA_IMM command
+ * This one fills up reloc buffer as well 
+ * @fd: drm file descriptor
+ * @buf: batch buffer
+ * @buffer_size: size of buffer
+ * @addr: destination Virtual address
+ * @data: data to be store at destination
+ * @reloc - relocation entry
+ * @end: whether to end batch buffer or not
+ */
+
+static int gem_store_data(int fd, uint32_t* cmd_buf,
+			      uint32_t handle, uint32_t data,
+			      struct drm_i915_gem_relocation_entry *reloc,
+			      bool end)
+{
+	int i = 0;
+
+	cmd_buf[i++] = MI_COMMAND | MI_STORE_DATA_IMM | USE_PPGTT | DWORD_LENGTH;
+	cmd_buf[i++] = 0; /* lower 31 bits of 48 bit address - 0 because reloc is needed */
+	cmd_buf[i++] = 0; /* upper 15 bits of 48 bit address - 0 because reloc is needed */
+	reloc->offset = 1 * sizeof(uint32_t);
+	reloc->delta = 0;
+	reloc->target_handle = handle;
+	reloc->read_domains = I915_GEM_DOMAIN_RENDER;
+	reloc->write_domain = I915_GEM_DOMAIN_RENDER;
+	reloc->presumed_offset = 0;
+	reloc++;
+	cmd_buf[i++] = data;
+	if (end) 
+	{
+		cmd_buf[i++] = MI_BATCH_BUFFER_END;
+		cmd_buf[i++] = 0;
+	}
+
+	return (i * sizeof(uint32_t));
+}
+
+
+/** gem_basic_test - This test will create a shared buffer, and create a command
+ *  for GPU to write data in it
+ *  CPU will read and make sure expected value is obtained
+ *  @valid_shared_buffer - whether test with valid malloc'd buffer or not
+
+@code
+   if (valid_shared_buffer == true)
+   Malloc a 4K buffer
+   Share buffer with with GPU by using userptr ioctl
+   Create batch buffer to write DATA to first dword of buffer
+   Use virtual address of buffer as destination address in batch buffer
+   Set EXEC_OBJECT_PINNED flag in exec object
+   Set 'offset' in exec object to shared buffer VMA
+   Submit execbuffer
+   Verify value of first DWORD in shared buffer matches DATA
+
+   if (valid_shared_buffer == false)
+   Declare null buffer
+   Call Userptr ioctl with null buffer
+   Run Basic Test
+   Test should fail at submit execbuffer
+@endcode
+*/
+static void gem_basic_test(bool valid_shared_buffer)
+{
+	i915_gem_userptr* userptr = NULL;
+	int fd, ret;
+	uint32_t* shared_buffer = NULL;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
+	uint32_t batch_buffer[STORE_BATCH_BUFFER_SIZE];
+	uint32_t batch_buf_handle, shared_buf_handle;
+	int ring, len;
+	const uint32_t data = 0x12345678;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	batch_buf_handle = gem_create(fd, BO_SIZE);
+
+	/* create cpu buffer, set to all 0xF's */
+	if (valid_shared_buffer)
+	{
+		shared_buffer = gem_create_mem_buffer(BO_SIZE);
+		//*shared_buffer = 0xFFFFFFFF;
+	}
+	
+	/* share with GPU */
+	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr);
+	igt_assert_eq(ret, 0);
+
+	/* Get handle for shared buffer */
+	shared_buf_handle = userptr->handle;
+	free(userptr);
+
+	/* create command buffer with write command */
+	len = gem_store_data_svm(fd, batch_buffer, shared_buffer, data, true);
+	igt_assert_lte(len, STORE_BATCH_BUFFER_SIZE * 4);
+
+	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+	/* submit command buffer */
+	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, shared_buffer);
+	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_BLT;
+
+	execbuf.buffers_ptr = (uintptr_t)exec_object2;
+	execbuf.buffer_count = NUM_EXEC_OBJECTS;
+	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;
+
+	if (valid_shared_buffer)
+	{
+		gem_execbuf(fd, &execbuf);
+	}
+	else
+	{
+		/* Expect execbuf to fail */
+		ret = drmIoctl(fd,
+		       DRM_IOCTL_I915_GEM_EXECBUFFER2,
+		       &execbuf);
+		igt_assert_neq(ret, 0);
+	}
+	gem_sync(fd, batch_buf_handle); 
+	gem_close(fd, batch_buf_handle);
+	close(fd);
+
+	// check on CPU to see if value changes
+	if (valid_shared_buffer)
+	{
+		igt_fail_on_f(shared_buffer[0] != data,
+			      "\nCPU read does not match GPU write, expected: 0x%x, got: 0x%x\n", data, shared_buffer[0]);
+
+		free(shared_buffer);
+	}
+}
+
+/** gem_multiple_process_test - Run basic test simultaneously with multiple processes
+*   This will test pinning same VA separately in each process
+
+    fork();
+    Execute basic test in parent/child processes
+
+**/
+
+static void gem_multiple_process_test(void)
+{
+	int status;
+	pid_t child_pid, wait_pid;
+	child_pid = fork();
+
+	if (child_pid == 0)
+	{
+		gem_basic_test(true);
+		_exit(0);
+	}
+	else 
+	{
+		gem_basic_test(true);
+		wait_pid = wait(&status); 
+		igt_assert(wait_pid != -1);
+	}
+}
+
+
+/** gem_repin_test
+ * This test tries to repin a buffer at a previously pinned vma 
+ * from a different execbuf. 
+
+@code
+   Malloc a 4K buffer
+   Share buffer with with GPU by using userptr ioctl
+   Create batch buffer to write DATA to first dword of buffer
+   Use virtual address of buffer as destination address in batch buffer
+   Set EXEC_OBJECT_PINNED flag in exec object
+   Set 'offset' in exec object to shared buffer VMA
+   Submit execbuffer
+   Verify value of first DWORD in shared buffer matches DATA
+
+   Create second shared buffer
+   Follow all steps above
+   Execpt, for offset, use VMA of first buffer above 
+   Submit execbuffer
+   Verify value of first DWORD in second shared buffer matches DATA
+
+@endcode
+**/
+
+static void gem_repin_test(void)
+{
+	i915_gem_userptr* userptr = NULL;
+	i915_gem_userptr* userptr1 = NULL;
+	int fd, ret;
+	uint32_t* shared_buffer = NULL;
+	uint32_t* shared_buffer1 = NULL;
+	struct drm_i915_gem_execbuffer2 execbuf, execbuf1;
+	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
+	uint32_t batch_buffer[STORE_BATCH_BUFFER_SIZE];
+	uint32_t batch_buf_handle, shared_buf_handle, shared_buf_handle1;
+	int ring, len;
+	const uint32_t data = 0x12345678;
+
+	// Create gem object
+	fd = drm_open_driver(DRIVER_INTEL);
+	batch_buf_handle = gem_create(fd, BO_SIZE);
+
+	// create cpu buffer, set to all 0xF's
+	shared_buffer = gem_create_mem_buffer(BO_SIZE);
+	shared_buffer1 = gem_create_mem_buffer(BO_SIZE * 2);
+
+	// share with GPU
+	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr);
+	igt_assert_eq(ret, 0);
+
+	userptr1 = gem_create_userptr_struct(shared_buffer1, BO_SIZE * 2, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr1);
+	igt_assert_eq(ret, 0);
+
+	// Get handle for shared buffer
+	shared_buf_handle = userptr->handle;
+	shared_buf_handle1 = userptr1->handle;
+	free(userptr);
+	free(userptr1);
+
+	// create command buffer with write command
+	len = gem_store_data_svm(fd, batch_buffer, shared_buffer, data, true);
+	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+	// submit command buffer
+	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, shared_buffer);
+	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_BLT;
+
+	execbuf.buffers_ptr = (uintptr_t)exec_object2;
+	execbuf.buffer_count = NUM_EXEC_OBJECTS;
+	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, batch_buf_handle); 
+
+
+	// Second buffer
+	// create command buffer with write command
+	len = gem_store_data_svm(fd, batch_buffer, shared_buffer1, data, true);
+	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+	// submit command buffer
+	// Pin at shared_buffer, not shared_buffer1
+	setup_exec_obj(&exec_object2[0], shared_buf_handle1, EXEC_OBJECT_PINNED, shared_buffer);
+	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_BLT;
+
+	execbuf1.buffers_ptr = (uintptr_t)exec_object2;
+	execbuf1.buffer_count = NUM_EXEC_OBJECTS;
+	execbuf1.batch_start_offset = 0;
+	execbuf1.batch_len = len;
+	execbuf1.cliprects_ptr = 0;
+	execbuf1.num_cliprects = 0;
+	execbuf1.DR1 = 0;
+	execbuf1.DR4 = 0;
+	execbuf1.flags = ring;
+	i915_execbuffer2_set_context_id(execbuf1, 0);
+	execbuf1.rsvd2 = 0;
+
+	gem_execbuf(fd, &execbuf1);
+	gem_sync(fd, batch_buf_handle); 
+
+	gem_close(fd, batch_buf_handle);
+	close(fd);
+
+	free(shared_buffer);
+	free(shared_buffer1);
+}
+
+
+/** gem_repin_overlap_test
+ *  This test will attempt to pin two buffers at the same VMA as part of the same
+    execbuffer object
+
+@code
+   Malloc a 4K buffer
+   Share buffer with with GPU by using userptr ioctl
+   Create second shared buffer
+   Create batch buffer to write DATA to first dword of each buffer
+   Use virtual address of each buffer as destination addresses in batch buffer
+   Set EXEC_OBJECT_PINNED flag in both exec objects
+   Set 'offset' in both exec objects to first shared buffer VMA
+   Submit execbuffer
+   Command should return EINVAL, since we are trying to pin to same VMA
+@endcode
+**/
+static void gem_pin_overlap_test(void)
+{
+	i915_gem_userptr* userptr = NULL;
+	i915_gem_userptr* userptr1 = NULL;
+	int fd, ret;
+	uint32_t* shared_buffer = NULL;
+	uint32_t* shared_buffer1 = NULL;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS + 1];
+	uint32_t batch_buffer[BO_SIZE];
+	uint32_t batch_buf_handle, shared_buf_handle, shared_buf_handle1;
+	int ring, len;
+	const uint32_t data = 0x12345678;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	batch_buf_handle = gem_create(fd, BO_SIZE);
+
+	shared_buffer = gem_create_mem_buffer(BO_SIZE);
+	shared_buffer1 = gem_create_mem_buffer(BO_SIZE * 2);
+
+	/* share with GPU */
+	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr);
+	igt_assert_eq(ret, 0);
+
+	userptr1 = gem_create_userptr_struct(shared_buffer1, BO_SIZE * 2, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr1);
+	igt_assert_eq(ret, 0);
+
+	shared_buf_handle = userptr->handle;
+	shared_buf_handle1 = userptr1->handle;
+	free(userptr);
+	free(userptr1);
+
+	len = gem_store_data_svm(fd, batch_buffer, shared_buffer, data, false);
+	len += gem_store_data_svm(fd, (batch_buffer + len/4), shared_buffer1, data, true);
+	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+	/* submit command buffer */
+	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, shared_buffer);
+	setup_exec_obj(&exec_object2[1], shared_buf_handle1, EXEC_OBJECT_PINNED, shared_buffer);
+	setup_exec_obj(&exec_object2[2], batch_buf_handle, 0, 0);
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_BLT;
+
+	execbuf.buffers_ptr = (uintptr_t)exec_object2;
+	execbuf.buffer_count = NUM_EXEC_OBJECTS + 1;
+	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;
+
+	ret = drmIoctl(fd,
+	      DRM_IOCTL_I915_GEM_EXECBUFFER2,
+	      &execbuf);
+
+	/* expect to fail */
+	igt_assert(errno == 22);
+	igt_assert_neq(ret, 0);
+
+	gem_close(fd, batch_buf_handle);
+	close(fd);
+
+	free(shared_buffer);
+	free(shared_buffer1);
+}
+
+
+/** gem_evict_test
+ *  create shared buffer, pin it
+ *  create normal buffer
+ *  try and relocate to shared location
+ *  Opens: How to detect eviction occured? 
+ *  i915_gem_gtt - debugfs api - grep it for the page? 
+
+@code
+    Create a gem buffer of 4K
+    Malloc a 4K buffer
+    Share buffer with GPU using userptr ioctl
+    Create a batch buffer to write 0x11111111 and 0x22222222 in above 2 buffers
+    Pin Shared buffer to offset '0' in GTT
+    Create reloc buffer to ensure gem buffer is relocated to GTT
+    Submit execbuffer
+    Verify shared buffer has 0x22222222 as expected
+    Obtain offset of where gem object has been placed from exec object field
+    Try to pin shared buffer at that address using 'offset' field in exec object
+    Prevent relocation by setting relocation_count = 0
+    Submit execbuffer
+    Shared buffer will be pinned to previous address of gem object
+    Unshared buffer will be evicted, since relocation is not allowed
+    Second batch buffer will write 0x11111111 to shared buffer instead of unshared
+    Verify shared buffer contains 0x11111111
+    Reverse order of instructions in batch buffer to write to unshared first
+@endcode
+
+**/
+
+static void gem_evict_test(void)
+{
+	i915_gem_userptr* userptr = NULL;
+	int fd, ret;
+	uint32_t* shared_buffer = NULL;
+	struct drm_i915_gem_relocation_entry reloc[4];
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS + 1];
+	uint32_t batch_buffer[STORE_BATCH_BUFFER_SIZE * 2];
+	uint32_t batch_buf_handle, shared_buf_handle, unshared_buf_handle;
+	int ring, len;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	batch_buf_handle = gem_create(fd, BO_SIZE);
+	unshared_buf_handle = gem_create(fd, BO_SIZE);
+
+	shared_buffer = gem_create_mem_buffer(BO_SIZE);
+	*shared_buffer = 0xFFFFFFFF;
+
+	// share with GPU
+	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr);
+	igt_assert_eq(ret, 0);
+
+	// Get handle for shared buffer
+	shared_buf_handle = userptr->handle;
+	free(userptr);
+
+	// create command buffer with write commands
+	len = gem_store_data(fd, batch_buffer, unshared_buf_handle, 0x11111111, reloc, false);
+	len += gem_store_data_svm(fd, batch_buffer + (len/4), NULL, 0x22222222, true);
+	igt_assert_lte(len, STORE_BATCH_BUFFER_SIZE * 2 * 4);
+	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+	// submit command buffer
+	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, 0);
+	setup_exec_obj(&exec_object2[1], unshared_buf_handle, 0, 0);
+	setup_exec_obj(&exec_object2[2], batch_buf_handle, 0, 0);
+
+	exec_object2[2].relocation_count = 1;
+	exec_object2[2].relocs_ptr = (uintptr_t)reloc;
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_BLT;
+
+	execbuf.buffers_ptr = (uintptr_t)exec_object2;
+	execbuf.buffer_count = NUM_EXEC_OBJECTS + 1;
+	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, batch_buf_handle); 
+	igt_assert(*shared_buffer == 0x22222222);
+	*shared_buffer = 0xffffffff;
+	// Now cause eviction of unshared buffer by pinning shared buffer there
+	exec_object2[0].offset = exec_object2[1].offset;
+	// Prevent relocation
+	exec_object2[2].relocation_count = 0;
+
+	gem_execbuf(fd, &execbuf);
+	gem_sync(fd, batch_buf_handle); 
+	igt_assert(*shared_buffer == 0x11111111);
+	igt_assert(exec_object2[0].offset != exec_object2[1].offset);
+
+	// Now lets do it again with the objects listed in reverse order...
+	*shared_buffer = 0xffffffff;
+	setup_exec_obj(&exec_object2[0], unshared_buf_handle, 0, 0);
+	setup_exec_obj(&exec_object2[1], shared_buf_handle, EXEC_OBJECT_PINNED, 0);
+	exec_object2[2].relocation_count = 1;
+	gem_execbuf(fd, &execbuf);
+	gem_sync(fd, batch_buf_handle);
+	igt_assert(*shared_buffer == 0x22222222);
+	*shared_buffer = 0xffffffff;
+	// Now cause eviction of unshared buffer by pinning shared buffer there
+	exec_object2[1].offset = exec_object2[0].offset;
+	// Prevent relocation
+	exec_object2[2].relocation_count = 0;
+
+	gem_execbuf(fd, &execbuf);
+	gem_sync(fd, batch_buf_handle);
+	igt_assert(*shared_buffer == 0x11111111);
+	igt_assert(exec_object2[0].offset != exec_object2[1].offset);
+
+	gem_close(fd, batch_buf_handle);
+	close(fd);
+
+	free(shared_buffer);
+}
+
+/** gem_stress_test - Stress test which creates 10K buffers and shares with GPU 
+@code
+   Create 10K uint32 buffers of size 4K each
+   Share with GPU using userptr ioctl
+   Create batch buffer to write DATA in first element of each buffer
+   Execute Batch Buffer on Blit ring STRESS_NUM_LOOPS times
+   Validate every buffer has DATA in first element
+   Repeat on Render ring
+@endcode
+**/
+#define STRESS_NUM_BUFFERS 10240
+#define STRESS_NUM_LOOPS 1000
+
+static void gem_stress_test(void)
+{
+	i915_gem_userptr* userptr = NULL;
+	int fd, ret;
+	uint32_t* shared_buffer[STRESS_NUM_BUFFERS];
+	uint32_t shared_handle[STRESS_NUM_BUFFERS];
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec_object2[STRESS_NUM_BUFFERS + 1];
+	uint32_t batch_buffer[4*STRESS_NUM_BUFFERS + 2];
+	uint32_t batch_buf_handle;
+	int ring, len, i, j;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	batch_buf_handle = gem_create(fd, sizeof(batch_buffer));
+
+	// create command buffer with write commands
+	len = 0;
+	for(i = 0; i < STRESS_NUM_BUFFERS; i++) 
+	{
+		shared_buffer[i] = gem_create_mem_buffer(BO_SIZE);
+		*shared_buffer[i] = 0xFFFFFFFF;
+
+		// share with GPU
+		userptr = gem_create_userptr_struct(shared_buffer[i], BO_SIZE, 0);
+		ret = gem_call_userptr_ioctl(fd, userptr);
+		igt_assert_eq(ret, 0);
+
+		// Get handle for shared buffer
+		shared_handle[i] = userptr->handle;
+		free(userptr);
+
+		setup_exec_obj(&exec_object2[i], shared_handle[i], EXEC_OBJECT_PINNED, shared_buffer[i]);
+		len += gem_store_data_svm(fd, batch_buffer + (len/4), shared_buffer[i], i , (i == STRESS_NUM_BUFFERS-1) ? true:false);
+	}
+	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+	// submit command buffer
+
+	exec_object2[STRESS_NUM_BUFFERS].handle = batch_buf_handle;
+	exec_object2[STRESS_NUM_BUFFERS].relocation_count = 0;
+	exec_object2[STRESS_NUM_BUFFERS].relocs_ptr = 0;
+	exec_object2[STRESS_NUM_BUFFERS].alignment = 0;
+	exec_object2[STRESS_NUM_BUFFERS].offset = 0;
+	exec_object2[STRESS_NUM_BUFFERS].flags = 0;
+	exec_object2[STRESS_NUM_BUFFERS].rsvd1 = 0;
+	exec_object2[STRESS_NUM_BUFFERS].rsvd2 = 0;
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_BLT;
+
+	execbuf.buffers_ptr = (uintptr_t)exec_object2;
+	execbuf.buffer_count = STRESS_NUM_BUFFERS + 1;
+	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;
+
+	for (i = 0; i < STRESS_NUM_LOOPS; i++) 
+	{
+		gem_execbuf(fd, &execbuf);
+		gem_sync(fd, batch_buf_handle);
+		for(j = 0; j < STRESS_NUM_BUFFERS; j++) 
+		{
+			igt_fail_on_f(*shared_buffer[j] != j,
+				      "Mismatch in object %d, iteration %d: 0x%08X\n", j, i, *shared_buffer[j]);
+			*shared_buffer[j] = (j<<2)+1;
+		}
+	}
+
+	// Now Render Ring
+	ring = I915_EXEC_BLT;
+	execbuf.flags = ring;
+	for (i = 0; i < STRESS_NUM_LOOPS; i++) 
+	{
+		gem_execbuf(fd, &execbuf);
+		gem_sync(fd, batch_buf_handle);
+		for(j = 0; j < STRESS_NUM_BUFFERS; j++) 
+		{
+			igt_fail_on_f(*shared_buffer[j] != j,
+				      "Mismatch in object %d, iteration %d: 0x%08X\n", j, i, *shared_buffer[j]);
+			*shared_buffer[j] = (j<<2)+1;
+		}
+	}
+
+	gem_close(fd, batch_buf_handle);
+	close(fd);
+
+	for(i = 0; i < STRESS_NUM_BUFFERS; i++) 
+	{
+		free(shared_buffer[i]);
+	}
+}
+
+#define STRESS2_NUM_BUFFERS 1
+#define STRESS2_NUM_LOOPS 256
+
+/** gem_write_multipage_buffer - Create a buffer spanning multiple
+    pages, and share with GPU. Write to every element of the buffer
+    and verify correct contents.
+
+@code
+   Create 16K uint32 buffer
+   Share with GPU using userptr ioctl
+   Create batch buffer to write DATA in all elements of buffer
+   Execute Batch Buffer
+   Validate every element has DATA
+@endcode
+**/
+static void gem_write_multipage_buffer_test(void)
+{
+	i915_gem_userptr* userptr = NULL;
+	int fd, ret;
+	uint32_t* shared_buffer;
+	uint32_t shared_handle;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
+	uint32_t batch_buffer[(4 * BO_SIZE) + 2];
+	uint32_t batch_buf_handle;
+	int ring, len, i, j;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	batch_buf_handle = gem_create(fd, sizeof(batch_buffer));
+
+	/* create command buffer with write commands */
+	len = 0;
+	shared_buffer = gem_create_mem_buffer(BO_SIZE * 4);
+	memset(batch_buffer, 0, sizeof(batch_buffer));
+
+	for(i = 0; i< BO_SIZE; i++)
+	{
+		shared_buffer[i] = 0;
+	}
+
+	/* share with GPU */
+	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE * 4, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr);
+	igt_assert_eq(ret, 0);
+
+	/* Get handle for shared buffer */
+	shared_handle = userptr->handle;
+	free(userptr);
+
+	setup_exec_obj(&exec_object2[0], shared_handle, EXEC_OBJECT_PINNED, shared_buffer);
+
+	for(j=0; j< (BO_SIZE); j++)
+	{
+		len += gem_store_data_svm(fd, batch_buffer + (len/4), &shared_buffer[j], j, (j == ((BO_SIZE)-1)) ? true:false);
+	}
+	
+	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+	// submit command buffer
+	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_BLT;
+
+	execbuf.buffers_ptr = (uintptr_t)exec_object2;
+	execbuf.buffer_count = NUM_EXEC_OBJECTS;
+	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, batch_buf_handle);
+	for(j = 0; j < (BO_SIZE); j++) 
+	{
+		igt_fail_on_f(shared_buffer[j] != j,
+			      "Mismatch in object %d: 0x%08X\n", j, shared_buffer[j]);
+	}
+
+	gem_close(fd, batch_buf_handle);
+	close(fd);
+
+	free(shared_buffer);
+}
+
+/** This test will request to pin a shared buffer to an invalid
+    VMA  > 48-bit address
+
+   Create shared buffer of size 4K
+   Try and Pin object to address 0x9000000000000
+**/
+static void gem_pin_invalid_vma_test(void)
+{
+	i915_gem_userptr* userptr = NULL;
+	int fd, ret;
+	uint32_t* shared_buffer = NULL;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
+	uint32_t batch_buffer[BO_SIZE];
+	uint32_t batch_buf_handle, shared_buf_handle;
+	int ring, len;
+	const uint32_t data = 0x12345678;
+	uint32_t* invalid_address = (uint32_t*)0x9000000000000;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	batch_buf_handle = gem_create(fd, BO_SIZE);
+
+	shared_buffer = gem_create_mem_buffer(BO_SIZE);
+	*shared_buffer = 0xFFFFFFFF;
+	
+	// share with GPU
+	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr);
+	igt_assert_eq(ret, 0);
+
+	shared_buf_handle = userptr->handle;
+	free(userptr);
+
+	len = gem_store_data_svm(fd, batch_buffer, shared_buffer, data, true);
+	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, invalid_address);
+	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_BLT;
+
+	execbuf.buffers_ptr = (uintptr_t)exec_object2;
+	execbuf.buffer_count = NUM_EXEC_OBJECTS;
+	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;
+
+	/* Expect execbuf to fail */
+	ret = drmIoctl(fd,
+	       DRM_IOCTL_I915_GEM_EXECBUFFER2,
+	       &execbuf);
+
+	igt_assert_neq(ret, 0);
+	
+	gem_sync(fd, batch_buf_handle); 
+	gem_close(fd, batch_buf_handle);
+	close(fd);
+
+	free(shared_buffer);
+}
+
+#define SHM_KEY 56789
+#define SHMEM_SIZE 4096
+/** gem_shmem_svm_test - Test userptr ioctl with shared memory
+ * This test creates a sysV IPC buffer and shares with GPU. 
+ * It will send GPU commands to write DATA in the buffer and 
+ * validate it on the CPU side when the command completes.
+
+ * Create arbitrary shmem id
+ * Use shmat to attach a 4K uint32 buffer to above id
+ * Share buffer with GPU using userptr ioctl
+ * Create Batch buffer to write DATA in the first element
+ * submit execbuffer
+ * Validate on CPU side that DATA was indeed written
+ */
+static void gem_shmem_test(void)
+{
+	int shmid;
+	i915_gem_userptr* userptr = NULL;
+	int fd, ret;
+	uint32_t* shared_buffer = NULL;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
+	uint32_t batch_buffer[BO_SIZE];
+	uint32_t batch_buf_handle, shared_buf_handle;
+	int ring, len;
+	const uint32_t data = 0x12345678;
+
+	shmid = shmget(SHM_KEY, SHMEM_SIZE, IPC_CREAT);
+	igt_assert_neq(shmid, -1);
+
+	shared_buffer = shmat(shmid, NULL, 0);	      
+	igt_assert(shared_buffer != (void*)-1);
+
+	memset(shared_buffer, 0, SHMEM_SIZE);
+	shared_buffer[0] = 0xFFFFFFFF;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	batch_buf_handle = gem_create(fd, BO_SIZE);
+
+	userptr = gem_create_userptr_struct(shared_buffer, SHMEM_SIZE, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr);
+	igt_assert_eq(ret, 0);
+
+	shared_buf_handle = userptr->handle;
+	free(userptr);
+	
+	/* create command buffer with write command */
+	len = gem_store_data_svm(fd, batch_buffer, shared_buffer, data, true);
+	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+	/* submit command buffer */
+	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, shared_buffer);
+	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_BLT;
+
+	execbuf.buffers_ptr = (uintptr_t)exec_object2;
+	execbuf.buffer_count = NUM_EXEC_OBJECTS;
+	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, batch_buf_handle); 
+
+	gem_close(fd, batch_buf_handle);
+	close(fd);
+
+	/* check on CPU to see if value changes */
+	igt_fail_on_f(shared_buffer[0] != data,
+		      "\nCPU read does not match GPU write, expected: 0x%x, got: 0x%x\n", data, shared_buffer[0]);
+
+	ret = shmdt(shared_buffer);
+	igt_assert_eq(ret, 0);
+
+}
+
+/** gem_pin_high_address_test - This test will create a shared buffer, and create a command
+ *  for GPU to write data in it. It will attempt to pin the buffer at address > 32 bits.
+ *  CPU will read and make sure expected value is obtained
+
+@code
+   Malloc a 4K buffer
+   Share buffer with with GPU by using userptr ioctl
+   Create batch buffer to write DATA to first dword of buffer
+   Use virtual address of buffer as 0x1100000000 (> 32 bit)
+   Set EXEC_OBJECT_PINNED flag in exec object
+   Set 'offset' in exec object to shared buffer VMA
+   Submit execbuffer
+   Verify value of first DWORD in shared buffer matches DATA
+@endcode
+*/
+
+static void gem_pin_high_address_test(void)
+{
+	i915_gem_userptr* userptr = NULL;
+	int fd, ret;
+	uint32_t* shared_buffer = NULL;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
+	uint32_t batch_buffer[BO_SIZE];
+	uint32_t batch_buf_handle, shared_buf_handle;
+	int ring, len;
+	const uint32_t data = 0x12345678;
+        uint32_t* high_address = (uint32_t*)0x1111FFFF000;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	batch_buf_handle = gem_create(fd, BO_SIZE);
+
+	/* create cpu buffer, set to all 0xF's */
+	shared_buffer = gem_create_mem_buffer(BO_SIZE);
+	*shared_buffer = 0xFFFFFFFF;
+
+	/* share with GPU */
+	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr);
+	igt_assert_eq(ret, 0);
+
+	/* Get handle for shared buffer */
+	shared_buf_handle = userptr->handle;
+	free(userptr);
+ 
+	/* create command buffer with write command */
+	len = gem_store_data_svm(fd, batch_buffer, high_address, data, true);
+	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+	/* submit command buffer */
+	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED | EXEC_OBJECT_SUPPORTS_48B_ADDRESS, high_address);
+	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_BLT;
+
+	execbuf.buffers_ptr = (uintptr_t)exec_object2;
+	execbuf.buffer_count = NUM_EXEC_OBJECTS;
+	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, batch_buf_handle);
+
+	// check on CPU to see if value changes
+	igt_fail_on_f(shared_buffer[0] != data,
+		      "\nCPU read does not match GPU write, expected: 0x%x, got: 0x%x\n", data, shared_buffer[0]);
+
+	gem_close(fd, batch_buf_handle);
+	close(fd);
+	free(shared_buffer);
+}
+
+/** gem_pin_near_48Bit_test - This test will create a shared buffer, and create a command
+ *  for GPU to write data in it. It will attempt to pin the buffer at address > 47 bits <= 48-bit.
+ *  CPU will read and make sure expected value is obtained
+
+@code
+   Malloc a 4K buffer
+   Share buffer with with GPU by using userptr ioctl
+   Create batch buffer to write DATA to first dword of buffer
+   Use virtual address of buffer as range between 47-bit and 48-bit
+   Set EXEC_OBJECT_PINNED flag in exec object
+   Set 'offset' in exec object to shared buffer VMA
+   Submit execbuffer
+   Verify value of first DWORD in shared buffer matches DATA
+@endcode
+*/
+#define BEGIN_HIGH_ADDRESS 0x7FFFFFFFF000 
+#define END_HIGH_ADDRESS 0xFFFFFFFFC000
+#define ADDRESS_INCREMENT 0x2000000000
+static void gem_pin_near_48Bit_test(void)
+{
+	i915_gem_userptr* userptr = NULL;
+	int fd, ret;
+	uint32_t* shared_buffer = NULL;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
+	uint32_t batch_buffer[BO_SIZE];
+	uint32_t batch_buf_handle, shared_buf_handle;
+	int ring, len;
+	const uint32_t data = 0x12345678;
+        uint32_t* high_address;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	batch_buf_handle = gem_create(fd, BO_SIZE);
+
+	/* create cpu buffer, set to all 0xF's */
+	shared_buffer = gem_create_mem_buffer(BO_SIZE);
+	*shared_buffer = 0xFFFFFFFF;
+
+	/* share with GPU */
+	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr);
+	igt_assert_eq(ret, 0);
+
+	/* Get handle for shared buffer */
+	shared_buf_handle = userptr->handle;
+	free(userptr);
+
+	for (high_address = (uint32_t*)BEGIN_HIGH_ADDRESS; high_address <= (uint32_t*)END_HIGH_ADDRESS; 
+						high_address+=ADDRESS_INCREMENT)
+	{
+		/* create command buffer with write command */
+		len = gem_store_data_svm(fd, batch_buffer, (uint32_t*)high_address, 
+					data, true);
+		gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+		/* submit command buffer */
+		setup_exec_obj(&exec_object2[0], shared_buf_handle, 
+				EXEC_OBJECT_PINNED | EXEC_OBJECT_SUPPORTS_48B_ADDRESS, 
+				high_address);
+		setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
+
+		ring = 0;
+		if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+			ring = I915_EXEC_BLT;
+
+		execbuf.buffers_ptr = (uintptr_t)exec_object2;
+		execbuf.buffer_count = NUM_EXEC_OBJECTS;
+		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, batch_buf_handle);
+
+		// check on CPU to see if value changes
+		if (shared_buffer[0] != data)
+		{
+			#ifdef IS_32BIT_USER
+			igt_info("\nCPU read does not match GPU write, expected: 0x%"PRIx32", got: 0x%"PRIx32", address: 0x%"PRIx32"\n", data, shared_buffer[0], (uintptr_t)high_address);
+			#else
+			igt_info("\nCPU read does not match GPU write, expected: 0x%"PRIx32", got: 0x%"PRIx32", address: 0x%"PRIx64"\n", data, shared_buffer[0], (uintptr_t)high_address);
+			#endif
+
+			igt_fail(1);
+		}
+	}
+
+	gem_close(fd, batch_buf_handle);
+	close(fd);
+	free(shared_buffer);
+}
+
+/** gem_pin_mmap_anonymous_test - This test will create a mmap anonymous buffer and
+ *  share with GPU. It will run basic test on this buffer. 
+
+@code
+   Create a anonymous mmap buffer
+   Share buffer with with GPU by using userptr ioctl
+   Create batch buffer to write DATA to first dword of buffer
+   Set EXEC_OBJECT_PINNED flag in exec object
+   Set 'offset' in exec object to shared buffer VMA
+   Submit execbuffer
+   Verify value of first DWORD in shared buffer matches DATA
+@endcode
+*/
+void gem_pin_mmap_anonymous_test(void)
+{
+	i915_gem_userptr* userptr = NULL;
+	int fd, ret;
+	uint32_t* shared_buffer = NULL;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
+	uint32_t batch_buffer[BO_SIZE];
+	uint32_t batch_buf_handle, shared_buf_handle;
+	int ring, len;
+	const uint32_t data = 0x12345678;
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	batch_buf_handle = gem_create(fd, BO_SIZE);
+
+	/* create anonymus mmap buffer, set to all 0xF's */
+	shared_buffer = mmap(NULL, BO_SIZE, PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+	igt_fail_on_f(shared_buffer == (void *)-1,
+		      "mmap call failed with %s\n", strerror(errno));
+
+	*shared_buffer = 0xFFFFFFFF;
+
+	/* share with GPU */
+	userptr = gem_create_userptr_struct(shared_buffer, BO_SIZE, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr);
+	igt_assert_eq(ret, 0);
+
+	/* Get handle for shared buffer */
+	shared_buf_handle = userptr->handle;
+	free(userptr);
+
+	/* create command buffer with write command */
+	len = gem_store_data_svm(fd, batch_buffer, shared_buffer, data, true);
+	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+	/* submit command buffer */
+	setup_exec_obj(&exec_object2[0], shared_buf_handle, EXEC_OBJECT_PINNED, shared_buffer);
+	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_BLT;
+
+	execbuf.buffers_ptr = (uintptr_t)exec_object2;
+	execbuf.buffer_count = NUM_EXEC_OBJECTS;
+	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, batch_buf_handle);
+
+	// check on CPU to see if value changes
+	igt_fail_on_f(shared_buffer[0] != data,
+		      "\nCPU read does not match GPU write, expected: 0x%x, got: 0x%x\n", data, shared_buffer[0]);
+
+	gem_close(fd, batch_buf_handle);
+	close(fd);
+	igt_fail_on_f(munmap(shared_buffer, BO_SIZE) != 0,
+		      "munmap failed with: %s", strerror(errno));
+}
+
+/** gem_pin_mmap_file_test - This test will use mmap command to map
+ *  a file in memory. It will then attempt to share the buffer with GPU
+ *  using the userptr ioctl. It will verify if CPU/GPU writes are consistent
+
+@code
+   open/create a file
+   lseek into the file and write some arbitrary data
+   this allows the mmap'd page to become resident
+   use mmap command to map the file into memory
+   Share buffer with with GPU by using userptr ioctl
+   Create batch buffer to write DATA to first dword of buffer
+   Set EXEC_OBJECT_PINNED flag in exec object
+   Set 'offset' in exec object to shared buffer VMA
+   Submit execbuffer
+   Verify value of first DWORD in shared buffer matches DATA
+   Close file
+@endcode
+*/
+void gem_pin_mmap_file_test(void)
+{
+	i915_gem_userptr* userptr = NULL;
+	int fd, ret;
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 exec_object2[NUM_EXEC_OBJECTS];
+	uint32_t batch_buffer[BO_SIZE];
+	uint32_t batch_buf_handle, dest_buf_handle;
+	int ring, len;
+	const uint32_t data = 0x12345678;
+        int fdout;
+	uint32_t *dest;
+	const char filename[] = "svm_mmap.txt";
+
+	fdout = open(filename, O_RDWR | O_CREAT | O_TRUNC, 0640);
+	igt_fail_on_f(fdout < 0, "Cannot open output file\n");
+
+	// Do this to ensure backing physical memory for the file
+	/* go to the location corresponding to the last byte */
+	if (lseek (fdout, BO_SIZE, SEEK_SET) == -1)
+		igt_info("lseek error");
+
+	/* write a dummy byte at the last location */
+	if (write (fdout, "", 1) != 1)
+		igt_info("write error");
+
+	fd = drm_open_driver(DRIVER_INTEL);
+	batch_buf_handle = gem_create(fd, BO_SIZE);
+
+	/* create anonymus mmap buffer, set to all 0xF's */
+	dest = mmap(0, BO_SIZE, PROT_WRITE, MAP_SHARED, fdout, 0);
+	igt_fail_on_f(dest == (void *)-1,
+		      "mmap call failed with %s\n", strerror(errno));
+	*dest = 0x11111111;
+
+	userptr = gem_create_userptr_struct(dest, BO_SIZE, 0);
+	ret = gem_call_userptr_ioctl(fd, userptr);
+	igt_assert_eq(ret, 0);
+	dest_buf_handle = userptr->handle;
+	free(userptr);
+
+	/* create command buffer with write command */
+	len = gem_store_data_svm(fd, batch_buffer, dest, data, true);
+	gem_write(fd, batch_buf_handle, 0, batch_buffer, len);
+
+	/* submit command buffer */
+	setup_exec_obj(&exec_object2[0], dest_buf_handle, EXEC_OBJECT_PINNED, dest);
+	setup_exec_obj(&exec_object2[1], batch_buf_handle, 0, 0);
+
+	ring = 0;
+	if (HAS_BLT_RING(intel_get_drm_devid(fd)))
+		ring = I915_EXEC_RENDER;
+
+	execbuf.buffers_ptr = (uintptr_t)exec_object2;
+	execbuf.buffer_count = NUM_EXEC_OBJECTS;
+	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, batch_buf_handle);
+
+	// check on CPU to see if value changes
+	igt_fail_on_f(*dest != data,
+		      "\nCPU read does not match GPU write, expected: 0x%x, got: 0x%x\n", data, dest[0]);
+
+	gem_close(fd, batch_buf_handle);
+	close(fd);
+	igt_fail_on_f(munmap(dest, BO_SIZE) != 0,
+		      "munmap failed with: %s", strerror(errno));
+	close(fdout);
+}
+
+
+int main(int argc, char* argv[])
+{
+	igt_subtest_init(argc, argv);
+	igt_skip_on_simulation();
+
+	igt_subtest("gem_null_buffer"){
+		gem_basic_test(false);
+	}
+	igt_subtest("gem_invalid_userptr"){
+		gem_invalid_userptr_test();
+	}
+	igt_subtest("gem_basic"){
+		gem_basic_test(true);
+	}
+	igt_subtest("gem_multiple_process"){
+		gem_multiple_process_test();
+	}
+	igt_subtest("gem_repin"){
+		gem_repin_test();
+	}
+	igt_subtest("gem_evict"){
+		gem_evict_test();
+	}
+	igt_subtest("gem_stress"){
+		gem_stress_test();
+	}
+	igt_subtest("gem_pin_overlap"){
+		gem_pin_overlap_test();
+	}
+	igt_subtest("gem_shmem"){
+		gem_shmem_test();
+	}
+	igt_subtest("gem_write_multipage_buffer"){
+		gem_write_multipage_buffer_test();
+	}
+#ifndef IS_32BIT_USER
+	igt_subtest("gem_pin_high_address"){
+		gem_pin_high_address_test();
+	}
+	igt_subtest("gem_pin_near_48Bit"){
+		gem_pin_near_48Bit_test();
+	}
+	igt_subtest("gem_pin_invalid_vma"){
+		gem_pin_invalid_vma_test();
+	}
+#endif
+	igt_subtest("gem_pin_mmap_anon"){
+		gem_pin_mmap_anonymous_test();
+	}
+	igt_subtest("gem_pin_mmap_file"){
+		gem_pin_mmap_file_test();
+	}
+
+	igt_exit();
+}