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/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES */
#ifndef __SELFTEST_IOMMUFD_UTILS
#define __SELFTEST_IOMMUFD_UTILS
#include <unistd.h>
#include <stddef.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <stdint.h>
#include <assert.h>
#include "../kselftest_harness.h"
#include "../../../../drivers/iommu/iommufd/iommufd_test.h"
/* Hack to make assertions more readable */
#define _IOMMU_TEST_CMD(x) IOMMU_TEST_CMD
static void *buffer;
static unsigned long BUFFER_SIZE;
/*
* Have the kernel check the refcount on pages. I don't know why a freshly
* mmap'd anon non-compound page starts out with a ref of 3
*/
#define check_refs(_ptr, _length, _refs) \
({ \
struct iommu_test_cmd test_cmd = { \
.size = sizeof(test_cmd), \
.op = IOMMU_TEST_OP_MD_CHECK_REFS, \
.check_refs = { .length = _length, \
.uptr = (uintptr_t)(_ptr), \
.refs = _refs }, \
}; \
ASSERT_EQ(0, \
ioctl(self->fd, \
_IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_REFS), \
&test_cmd)); \
})
static int _test_cmd_mock_domain(int fd, unsigned int ioas_id, __u32 *device_id,
__u32 *hwpt_id)
{
struct iommu_test_cmd cmd = {
.size = sizeof(cmd),
.op = IOMMU_TEST_OP_MOCK_DOMAIN,
.id = ioas_id,
.mock_domain = {},
};
int ret;
ret = ioctl(fd, IOMMU_TEST_CMD, &cmd);
if (ret)
return ret;
if (device_id)
*device_id = cmd.mock_domain.out_device_id;
assert(cmd.id != 0);
if (hwpt_id)
*hwpt_id = cmd.mock_domain.out_hwpt_id;
return 0;
}
#define test_cmd_mock_domain(ioas_id, device_id, hwpt_id) \
ASSERT_EQ(0, _test_cmd_mock_domain(self->fd, ioas_id, device_id, \
hwpt_id))
#define test_err_mock_domain(_errno, ioas_id, device_id, hwpt_id) \
EXPECT_ERRNO(_errno, _test_cmd_mock_domain(self->fd, ioas_id, \
device_id, hwpt_id))
static int _test_cmd_create_access(int fd, unsigned int ioas_id,
__u32 *access_id, unsigned int flags)
{
struct iommu_test_cmd cmd = {
.size = sizeof(cmd),
.op = IOMMU_TEST_OP_CREATE_ACCESS,
.id = ioas_id,
.create_access = { .flags = flags },
};
int ret;
ret = ioctl(fd, IOMMU_TEST_CMD, &cmd);
if (ret)
return ret;
*access_id = cmd.create_access.out_access_fd;
return 0;
}
#define test_cmd_create_access(ioas_id, access_id, flags) \
ASSERT_EQ(0, _test_cmd_create_access(self->fd, ioas_id, access_id, \
flags))
static int _test_cmd_destroy_access(unsigned int access_id)
{
return close(access_id);
}
#define test_cmd_destroy_access(access_id) \
ASSERT_EQ(0, _test_cmd_destroy_access(access_id))
static int _test_cmd_destroy_access_pages(int fd, unsigned int access_id,
unsigned int access_pages_id)
{
struct iommu_test_cmd cmd = {
.size = sizeof(cmd),
.op = IOMMU_TEST_OP_DESTROY_ACCESS_PAGES,
.id = access_id,
.destroy_access_pages = { .access_pages_id = access_pages_id },
};
return ioctl(fd, IOMMU_TEST_CMD, &cmd);
}
#define test_cmd_destroy_access_pages(access_id, access_pages_id) \
ASSERT_EQ(0, _test_cmd_destroy_access_pages(self->fd, access_id, \
access_pages_id))
#define test_err_destroy_access_pages(_errno, access_id, access_pages_id) \
EXPECT_ERRNO(_errno, _test_cmd_destroy_access_pages( \
self->fd, access_id, access_pages_id))
static int _test_ioctl_destroy(int fd, unsigned int id)
{
struct iommu_destroy cmd = {
.size = sizeof(cmd),
.id = id,
};
return ioctl(fd, IOMMU_DESTROY, &cmd);
}
#define test_ioctl_destroy(id) ASSERT_EQ(0, _test_ioctl_destroy(self->fd, id))
static int _test_ioctl_ioas_alloc(int fd, __u32 *id)
{
struct iommu_ioas_alloc cmd = {
.size = sizeof(cmd),
};
int ret;
ret = ioctl(fd, IOMMU_IOAS_ALLOC, &cmd);
if (ret)
return ret;
*id = cmd.out_ioas_id;
return 0;
}
#define test_ioctl_ioas_alloc(id) \
({ \
ASSERT_EQ(0, _test_ioctl_ioas_alloc(self->fd, id)); \
ASSERT_NE(0, *(id)); \
})
static int _test_ioctl_ioas_map(int fd, unsigned int ioas_id, void *buffer,
size_t length, __u64 *iova, unsigned int flags)
{
struct iommu_ioas_map cmd = {
.size = sizeof(cmd),
.flags = flags,
.ioas_id = ioas_id,
.user_va = (uintptr_t)buffer,
.length = length,
};
int ret;
if (flags & IOMMU_IOAS_MAP_FIXED_IOVA)
cmd.iova = *iova;
ret = ioctl(fd, IOMMU_IOAS_MAP, &cmd);
*iova = cmd.iova;
return ret;
}
#define test_ioctl_ioas_map(buffer, length, iova_p) \
ASSERT_EQ(0, _test_ioctl_ioas_map(self->fd, self->ioas_id, buffer, \
length, iova_p, \
IOMMU_IOAS_MAP_WRITEABLE | \
IOMMU_IOAS_MAP_READABLE))
#define test_err_ioctl_ioas_map(_errno, buffer, length, iova_p) \
EXPECT_ERRNO(_errno, \
_test_ioctl_ioas_map(self->fd, self->ioas_id, buffer, \
length, iova_p, \
IOMMU_IOAS_MAP_WRITEABLE | \
IOMMU_IOAS_MAP_READABLE))
#define test_ioctl_ioas_map_id(ioas_id, buffer, length, iova_p) \
ASSERT_EQ(0, _test_ioctl_ioas_map(self->fd, ioas_id, buffer, length, \
iova_p, \
IOMMU_IOAS_MAP_WRITEABLE | \
IOMMU_IOAS_MAP_READABLE))
#define test_ioctl_ioas_map_fixed(buffer, length, iova) \
({ \
__u64 __iova = iova; \
ASSERT_EQ(0, _test_ioctl_ioas_map( \
self->fd, self->ioas_id, buffer, length, \
&__iova, \
IOMMU_IOAS_MAP_FIXED_IOVA | \
IOMMU_IOAS_MAP_WRITEABLE | \
IOMMU_IOAS_MAP_READABLE)); \
})
#define test_err_ioctl_ioas_map_fixed(_errno, buffer, length, iova) \
({ \
__u64 __iova = iova; \
EXPECT_ERRNO(_errno, \
_test_ioctl_ioas_map( \
self->fd, self->ioas_id, buffer, length, \
&__iova, \
IOMMU_IOAS_MAP_FIXED_IOVA | \
IOMMU_IOAS_MAP_WRITEABLE | \
IOMMU_IOAS_MAP_READABLE)); \
})
static int _test_ioctl_ioas_unmap(int fd, unsigned int ioas_id, uint64_t iova,
size_t length, uint64_t *out_len)
{
struct iommu_ioas_unmap cmd = {
.size = sizeof(cmd),
.ioas_id = ioas_id,
.iova = iova,
.length = length,
};
int ret;
ret = ioctl(fd, IOMMU_IOAS_UNMAP, &cmd);
if (out_len)
*out_len = cmd.length;
return ret;
}
#define test_ioctl_ioas_unmap(iova, length) \
ASSERT_EQ(0, _test_ioctl_ioas_unmap(self->fd, self->ioas_id, iova, \
length, NULL))
#define test_ioctl_ioas_unmap_id(ioas_id, iova, length) \
ASSERT_EQ(0, _test_ioctl_ioas_unmap(self->fd, ioas_id, iova, length, \
NULL))
#define test_err_ioctl_ioas_unmap(_errno, iova, length) \
EXPECT_ERRNO(_errno, _test_ioctl_ioas_unmap(self->fd, self->ioas_id, \
iova, length, NULL))
static int _test_ioctl_set_temp_memory_limit(int fd, unsigned int limit)
{
struct iommu_test_cmd memlimit_cmd = {
.size = sizeof(memlimit_cmd),
.op = IOMMU_TEST_OP_SET_TEMP_MEMORY_LIMIT,
.memory_limit = { .limit = limit },
};
return ioctl(fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_SET_TEMP_MEMORY_LIMIT),
&memlimit_cmd);
}
#define test_ioctl_set_temp_memory_limit(limit) \
ASSERT_EQ(0, _test_ioctl_set_temp_memory_limit(self->fd, limit))
#define test_ioctl_set_default_memory_limit() \
test_ioctl_set_temp_memory_limit(65536)
static void teardown_iommufd(int fd, struct __test_metadata *_metadata)
{
struct iommu_test_cmd test_cmd = {
.size = sizeof(test_cmd),
.op = IOMMU_TEST_OP_MD_CHECK_REFS,
.check_refs = { .length = BUFFER_SIZE,
.uptr = (uintptr_t)buffer },
};
if (fd == -1)
return;
EXPECT_EQ(0, close(fd));
fd = open("/dev/iommu", O_RDWR);
EXPECT_NE(-1, fd);
EXPECT_EQ(0, ioctl(fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_REFS),
&test_cmd));
EXPECT_EQ(0, close(fd));
}
#define EXPECT_ERRNO(expected_errno, cmd) \
({ \
ASSERT_EQ(-1, cmd); \
EXPECT_EQ(expected_errno, errno); \
})
#endif
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