Some simple tests for IOMMUFD_CMD_HW_QUEUE_ALLOC infrastructure covering the new iommufd_hw_queue_depend/undepend() helpers.
Signed-off-by: Nicolin Chen nicolinc@nvidia.com --- drivers/iommu/iommufd/iommufd_test.h | 3 + tools/testing/selftests/iommu/iommufd_utils.h | 31 ++++++ drivers/iommu/iommufd/selftest.c | 97 +++++++++++++++++++ tools/testing/selftests/iommu/iommufd.c | 58 +++++++++++ .../selftests/iommu/iommufd_fail_nth.c | 6 ++ 5 files changed, 195 insertions(+)
diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h index fbf9ecb35a13..51cd744a354f 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -265,4 +265,7 @@ struct iommu_viommu_event_selftest { __u32 virt_id; };
+#define IOMMU_HW_QUEUE_TYPE_SELFTEST 0xdeadbeef +#define IOMMU_TEST_HW_QUEUE_MAX 2 + #endif diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h index a5d4cbd089ba..9a556f99d992 100644 --- a/tools/testing/selftests/iommu/iommufd_utils.h +++ b/tools/testing/selftests/iommu/iommufd_utils.h @@ -956,6 +956,37 @@ static int _test_cmd_vdevice_alloc(int fd, __u32 viommu_id, __u32 idev_id, _test_cmd_vdevice_alloc(self->fd, viommu_id, idev_id, \ virt_id, vdev_id))
+static int _test_cmd_hw_queue_alloc(int fd, __u32 viommu_id, __u32 type, + __u32 idx, __u64 base_addr, __u64 length, + __u32 *hw_queue_id) +{ + struct iommu_hw_queue_alloc cmd = { + .size = sizeof(cmd), + .viommu_id = viommu_id, + .type = type, + .index = idx, + .nesting_parent_iova = base_addr, + .length = length, + }; + int ret; + + ret = ioctl(fd, IOMMU_HW_QUEUE_ALLOC, &cmd); + if (ret) + return ret; + if (hw_queue_id) + *hw_queue_id = cmd.out_hw_queue_id; + return 0; +} + +#define test_cmd_hw_queue_alloc(viommu_id, type, idx, base_addr, len, out_qid) \ + ASSERT_EQ(0, _test_cmd_hw_queue_alloc(self->fd, viommu_id, type, idx, \ + base_addr, len, out_qid)) +#define test_err_hw_queue_alloc(_errno, viommu_id, type, idx, base_addr, len, \ + out_qid) \ + EXPECT_ERRNO(_errno, \ + _test_cmd_hw_queue_alloc(self->fd, viommu_id, type, idx, \ + base_addr, len, out_qid)) + static int _test_cmd_veventq_alloc(int fd, __u32 viommu_id, __u32 type, __u32 *veventq_id, __u32 *veventq_fd) { diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index 38066dfeb2e7..2189e9b119ee 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -150,6 +150,8 @@ to_mock_nested(struct iommu_domain *domain) struct mock_viommu { struct iommufd_viommu core; struct mock_iommu_domain *s2_parent; + struct mock_hw_queue *hw_queue[IOMMU_TEST_HW_QUEUE_MAX]; + struct mutex queue_mutex; };
static inline struct mock_viommu *to_mock_viommu(struct iommufd_viommu *viommu) @@ -157,6 +159,19 @@ static inline struct mock_viommu *to_mock_viommu(struct iommufd_viommu *viommu) return container_of(viommu, struct mock_viommu, core); }
+struct mock_hw_queue { + struct iommufd_hw_queue core; + struct mock_viommu *mock_viommu; + struct mock_hw_queue *prev; + u16 index; +}; + +static inline struct mock_hw_queue * +to_mock_hw_queue(struct iommufd_hw_queue *hw_queue) +{ + return container_of(hw_queue, struct mock_hw_queue, core); +} + enum selftest_obj_type { TYPE_IDEV, }; @@ -670,9 +685,11 @@ static void mock_viommu_destroy(struct iommufd_viommu *viommu) { struct mock_iommu_device *mock_iommu = container_of( viommu->iommu_dev, struct mock_iommu_device, iommu_dev); + struct mock_viommu *mock_viommu = to_mock_viommu(viommu);
if (refcount_dec_and_test(&mock_iommu->users)) complete(&mock_iommu->complete); + mutex_destroy(&mock_viommu->queue_mutex);
/* iommufd core frees mock_viommu and viommu */ } @@ -764,10 +781,86 @@ static int mock_viommu_cache_invalidate(struct iommufd_viommu *viommu, return rc; }
+static size_t mock_viommu_get_hw_queue_size(struct iommufd_viommu *viommu, + enum iommu_hw_queue_type queue_type) +{ + if (queue_type != IOMMU_HW_QUEUE_TYPE_SELFTEST) + return 0; + return HW_QUEUE_STRUCT_SIZE(struct mock_hw_queue, core); +} + +static void mock_hw_queue_destroy(struct iommufd_hw_queue *hw_queue) +{ + struct mock_hw_queue *mock_hw_queue = to_mock_hw_queue(hw_queue); + struct mock_viommu *mock_viommu = mock_hw_queue->mock_viommu; + + mutex_lock(&mock_viommu->queue_mutex); + mock_viommu->hw_queue[mock_hw_queue->index] = NULL; + if (mock_hw_queue->prev) + iommufd_hw_queue_undepend(mock_hw_queue, mock_hw_queue->prev, + core); + mutex_unlock(&mock_viommu->queue_mutex); +} + +/* Test iommufd_hw_queue_depend/undepend() */ +static int mock_hw_queue_init_phys(struct iommufd_hw_queue *hw_queue, u32 index, + phys_addr_t base_addr_pa) +{ + struct mock_viommu *mock_viommu = to_mock_viommu(hw_queue->viommu); + struct mock_hw_queue *mock_hw_queue = to_mock_hw_queue(hw_queue); + struct mock_hw_queue *prev = NULL; + int rc = 0; + + if (index >= IOMMU_TEST_HW_QUEUE_MAX) + return -EINVAL; + + mutex_lock(&mock_viommu->queue_mutex); + + if (mock_viommu->hw_queue[index]) { + rc = -EEXIST; + goto unlock; + } + + if (index) { + prev = mock_viommu->hw_queue[index - 1]; + if (!prev) { + rc = -EIO; + goto unlock; + } + } + + /* + * Test to catch a kernel bug if the core converted the physical address + * incorrectly. Let mock_domain_iova_to_phys() WARN_ON if it fails. + */ + if (base_addr_pa != iommu_iova_to_phys(&mock_viommu->s2_parent->domain, + hw_queue->base_addr)) { + rc = -EFAULT; + goto unlock; + } + + if (prev) { + rc = iommufd_hw_queue_depend(mock_hw_queue, prev, core); + if (rc) + goto unlock; + } + + mock_hw_queue->prev = prev; + mock_hw_queue->mock_viommu = mock_viommu; + mock_viommu->hw_queue[index] = mock_hw_queue; + + hw_queue->destroy = &mock_hw_queue_destroy; +unlock: + mutex_unlock(&mock_viommu->queue_mutex); + return rc; +} + static struct iommufd_viommu_ops mock_viommu_ops = { .destroy = mock_viommu_destroy, .alloc_domain_nested = mock_viommu_alloc_domain_nested, .cache_invalidate = mock_viommu_cache_invalidate, + .get_hw_queue_size = mock_viommu_get_hw_queue_size, + .hw_queue_init_phys = mock_hw_queue_init_phys, };
static size_t mock_get_viommu_size(struct device *dev, @@ -784,6 +877,7 @@ static int mock_viommu_init(struct iommufd_viommu *viommu, { struct mock_iommu_device *mock_iommu = container_of( viommu->iommu_dev, struct mock_iommu_device, iommu_dev); + struct mock_viommu *mock_viommu = to_mock_viommu(viommu); struct iommu_viommu_selftest data; int rc;
@@ -801,6 +895,9 @@ static int mock_viommu_init(struct iommufd_viommu *viommu, }
refcount_inc(&mock_iommu->users); + mutex_init(&mock_viommu->queue_mutex); + mock_viommu->s2_parent = to_mock_domain(parent_domain); + viommu->ops = &mock_viommu_ops; return 0; } diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c index a9dfcce5e1b2..6b88c250b505 100644 --- a/tools/testing/selftests/iommu/iommufd.c +++ b/tools/testing/selftests/iommu/iommufd.c @@ -3032,6 +3032,64 @@ TEST_F(iommufd_viommu, vdevice_cache) } }
+TEST_F(iommufd_viommu, hw_queue) +{ + __u64 iova = MOCK_APERTURE_START, iova2; + uint32_t viommu_id = self->viommu_id; + uint32_t hw_queue_id[2]; + + if (!viommu_id) + SKIP(return, "Skipping test for variant no_viommu"); + + /* Fail IOMMU_HW_QUEUE_TYPE_DEFAULT */ + test_err_hw_queue_alloc(EOPNOTSUPP, viommu_id, + IOMMU_HW_QUEUE_TYPE_DEFAULT, 0, iova, PAGE_SIZE, + &hw_queue_id[0]); + /* Fail queue addr and length */ + test_err_hw_queue_alloc(EINVAL, viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, + 0, iova, 0, &hw_queue_id[0]); + test_err_hw_queue_alloc(EOVERFLOW, viommu_id, + IOMMU_HW_QUEUE_TYPE_SELFTEST, 0, ~(uint64_t)0, + PAGE_SIZE, &hw_queue_id[0]); + /* Fail missing iova */ + test_err_hw_queue_alloc(ENOENT, viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, + 0, iova, PAGE_SIZE, &hw_queue_id[0]); + + /* Map iova */ + test_ioctl_ioas_map(buffer, PAGE_SIZE, &iova); + test_ioctl_ioas_map(buffer + PAGE_SIZE, PAGE_SIZE, &iova2); + + /* Fail index=1 and =MAX; must start from index=0 */ + test_err_hw_queue_alloc(EIO, viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, 1, + iova, PAGE_SIZE, &hw_queue_id[0]); + test_err_hw_queue_alloc(EINVAL, viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, + IOMMU_TEST_HW_QUEUE_MAX, iova, PAGE_SIZE, + &hw_queue_id[0]); + + /* Allocate index=0, declare ownership of the iova */ + test_cmd_hw_queue_alloc(viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, 0, + iova, PAGE_SIZE, &hw_queue_id[0]); + /* Fail duplicate */ + test_err_hw_queue_alloc(EEXIST, viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, + 0, iova, PAGE_SIZE, &hw_queue_id[0]); + /* Fail unmap, due to iova ownership */ + test_err_ioctl_ioas_unmap(EBUSY, iova, PAGE_SIZE); + /* The 2nd page is not pinned, so it can be unmmap */ + test_ioctl_ioas_unmap(iova + PAGE_SIZE, PAGE_SIZE); + + /* Allocate index=1 */ + test_cmd_hw_queue_alloc(viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, 1, + iova, PAGE_SIZE, &hw_queue_id[1]); + /* Fail to destroy, due to dependency */ + EXPECT_ERRNO(EBUSY, _test_ioctl_destroy(self->fd, hw_queue_id[0])); + + /* Destroy in descending order */ + test_ioctl_destroy(hw_queue_id[1]); + test_ioctl_destroy(hw_queue_id[0]); + /* Now it can unmap the first page */ + test_ioctl_ioas_unmap(iova, PAGE_SIZE); +} + FIXTURE(iommufd_device_pasid) { int fd; diff --git a/tools/testing/selftests/iommu/iommufd_fail_nth.c b/tools/testing/selftests/iommu/iommufd_fail_nth.c index f7ccf1822108..41c685bbd252 100644 --- a/tools/testing/selftests/iommu/iommufd_fail_nth.c +++ b/tools/testing/selftests/iommu/iommufd_fail_nth.c @@ -634,6 +634,7 @@ TEST_FAIL_NTH(basic_fail_nth, device) uint32_t idev_id; uint32_t hwpt_id; uint32_t viommu_id; + uint32_t hw_queue_id; uint32_t vdev_id; __u64 iova;
@@ -696,6 +697,11 @@ TEST_FAIL_NTH(basic_fail_nth, device) if (_test_cmd_vdevice_alloc(self->fd, viommu_id, idev_id, 0, &vdev_id)) return -1;
+ if (_test_cmd_hw_queue_alloc(self->fd, viommu_id, + IOMMU_HW_QUEUE_TYPE_SELFTEST, 0, iova, + PAGE_SIZE, &hw_queue_id)) + return -1; + if (_test_ioctl_fault_alloc(self->fd, &fault_id, &fault_fd)) return -1; close(fault_fd);