| /* 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 |
