diff mbox series

[v6,4/4] iommufd/selftest: Add coverage for IOMMU_GET_HW_INFO ioctl

Message ID 20230808153510.4170-5-yi.l.liu@intel.com (mailing list archive)
State New, archived
Headers show
Series iommufd: Add iommu hardware info reporting | expand

Commit Message

Yi Liu Aug. 8, 2023, 3:35 p.m. UTC 
From: Nicolin Chen <nicolinc@nvidia.com>

Add a mock_domain_hw_info function and an iommu_test_hw_info data
structure. This allows to test the IOMMU_GET_HW_INFO ioctl passing
the test_reg value for the mock_dev.

Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
 drivers/iommu/iommufd/iommufd_test.h          |  9 +++++++
 drivers/iommu/iommufd/selftest.c              | 16 ++++++++++++
 tools/testing/selftests/iommu/iommufd.c       | 17 +++++++++++-
 tools/testing/selftests/iommu/iommufd_utils.h | 26 +++++++++++++++++++
 4 files changed, 67 insertions(+), 1 deletion(-)

Comments

Jason Gunthorpe Aug. 9, 2023, 4:45 p.m. UTC | #1 
On Tue, Aug 08, 2023 at 08:35:10AM -0700, Yi Liu wrote:
> From: Nicolin Chen <nicolinc@nvidia.com>
> 
> Add a mock_domain_hw_info function and an iommu_test_hw_info data
> structure. This allows to test the IOMMU_GET_HW_INFO ioctl passing
> the test_reg value for the mock_dev.
> 
> Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
> Signed-off-by: Yi Liu <yi.l.liu@intel.com>
> ---
>  drivers/iommu/iommufd/iommufd_test.h          |  9 +++++++
>  drivers/iommu/iommufd/selftest.c              | 16 ++++++++++++
>  tools/testing/selftests/iommu/iommufd.c       | 17 +++++++++++-
>  tools/testing/selftests/iommu/iommufd_utils.h | 26 +++++++++++++++++++
>  4 files changed, 67 insertions(+), 1 deletion(-)

Don't forget to add it to fail_nth

Jason
Yi Liu Aug. 11, 2023, 6:57 a.m. UTC | #2 
> From: Jason Gunthorpe <jgg@nvidia.com>
> Sent: Thursday, August 10, 2023 12:46 AM
> 
> On Tue, Aug 08, 2023 at 08:35:10AM -0700, Yi Liu wrote:
> > From: Nicolin Chen <nicolinc@nvidia.com>
> >
> > Add a mock_domain_hw_info function and an iommu_test_hw_info data
> > structure. This allows to test the IOMMU_GET_HW_INFO ioctl passing
> > the test_reg value for the mock_dev.
> >
> > Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
> > Signed-off-by: Yi Liu <yi.l.liu@intel.com>
> > ---
> >  drivers/iommu/iommufd/iommufd_test.h          |  9 +++++++
> >  drivers/iommu/iommufd/selftest.c              | 16 ++++++++++++
> >  tools/testing/selftests/iommu/iommufd.c       | 17 +++++++++++-
> >  tools/testing/selftests/iommu/iommufd_utils.h | 26 +++++++++++++++++++
> >  4 files changed, 67 insertions(+), 1 deletion(-)
> 
> Don't forget to add it to fail_nth

Sure. Btw. Would you share us the rule on determining whether an ioctl/path
requires fail_nth case or not.

Regards,
Yi Liu
Jason Gunthorpe Aug. 11, 2023, 12:01 p.m. UTC | #3 
On Fri, Aug 11, 2023 at 06:57:34AM +0000, Liu, Yi L wrote:
> > From: Jason Gunthorpe <jgg@nvidia.com>
> > Sent: Thursday, August 10, 2023 12:46 AM
> > 
> > On Tue, Aug 08, 2023 at 08:35:10AM -0700, Yi Liu wrote:
> > > From: Nicolin Chen <nicolinc@nvidia.com>
> > >
> > > Add a mock_domain_hw_info function and an iommu_test_hw_info data
> > > structure. This allows to test the IOMMU_GET_HW_INFO ioctl passing
> > > the test_reg value for the mock_dev.
> > >
> > > Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
> > > Signed-off-by: Yi Liu <yi.l.liu@intel.com>
> > > ---
> > >  drivers/iommu/iommufd/iommufd_test.h          |  9 +++++++
> > >  drivers/iommu/iommufd/selftest.c              | 16 ++++++++++++
> > >  tools/testing/selftests/iommu/iommufd.c       | 17 +++++++++++-
> > >  tools/testing/selftests/iommu/iommufd_utils.h | 26 +++++++++++++++++++
> > >  4 files changed, 67 insertions(+), 1 deletion(-)
> > 
> > Don't forget to add it to fail_nth
> 
> Sure. Btw. Would you share us the rule on determining whether an ioctl/path
> requires fail_nth case or not.

It always requires it :)

Jason
diff mbox series

Patch

diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h
index 258de2253b61..3f3644375bf1 100644
--- a/drivers/iommu/iommufd/iommufd_test.h
+++ b/drivers/iommu/iommufd/iommufd_test.h
@@ -100,4 +100,13 @@  struct iommu_test_cmd {
 };
 #define IOMMU_TEST_CMD _IO(IOMMUFD_TYPE, IOMMUFD_CMD_BASE + 32)
 
+/* Mock structs for IOMMU_DEVICE_GET_HW_INFO ioctl */
+#define IOMMU_HW_INFO_TYPE_SELFTEST	0xfeedbeef
+#define IOMMU_HW_INFO_SELFTEST_REGVAL	0xdeadbeef
+
+struct iommu_test_hw_info {
+	__u32 flags;
+	__u32 test_reg;
+};
+
 #endif
diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c
index bb2cd54ca7b6..ab4011e3a7c6 100644
--- a/drivers/iommu/iommufd/selftest.c
+++ b/drivers/iommu/iommufd/selftest.c
@@ -128,6 +128,21 @@  static struct iommu_domain mock_blocking_domain = {
 	.ops = &mock_blocking_ops,
 };
 
+static void *mock_domain_hw_info(struct device *dev, u32 *length, u32 *type)
+{
+	struct iommu_test_hw_info *info;
+
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return ERR_PTR(-ENOMEM);
+
+	info->test_reg = IOMMU_HW_INFO_SELFTEST_REGVAL;
+	*length = sizeof(*info);
+	*type = IOMMU_HW_INFO_TYPE_SELFTEST;
+
+	return info;
+}
+
 static struct iommu_domain *mock_domain_alloc(unsigned int iommu_domain_type)
 {
 	struct mock_iommu_domain *mock;
@@ -279,6 +294,7 @@  static void mock_domain_set_plaform_dma_ops(struct device *dev)
 static const struct iommu_ops mock_ops = {
 	.owner = THIS_MODULE,
 	.pgsize_bitmap = MOCK_IO_PAGE_SIZE,
+	.hw_info = mock_domain_hw_info,
 	.domain_alloc = mock_domain_alloc,
 	.capable = mock_domain_capable,
 	.set_platform_dma_ops = mock_domain_set_plaform_dma_ops,
diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c
index 8acd0af37aa5..6b075a68b928 100644
--- a/tools/testing/selftests/iommu/iommufd.c
+++ b/tools/testing/selftests/iommu/iommufd.c
@@ -113,6 +113,7 @@  TEST_F(iommufd, cmd_length)
 	}
 
 	TEST_LENGTH(iommu_destroy, IOMMU_DESTROY);
+	TEST_LENGTH(iommu_hw_info, IOMMU_GET_HW_INFO);
 	TEST_LENGTH(iommu_ioas_alloc, IOMMU_IOAS_ALLOC);
 	TEST_LENGTH(iommu_ioas_iova_ranges, IOMMU_IOAS_IOVA_RANGES);
 	TEST_LENGTH(iommu_ioas_allow_iovas, IOMMU_IOAS_ALLOW_IOVAS);
@@ -185,6 +186,7 @@  FIXTURE(iommufd_ioas)
 	uint32_t ioas_id;
 	uint32_t stdev_id;
 	uint32_t hwpt_id;
+	uint32_t device_id;
 	uint64_t base_iova;
 };
 
@@ -211,7 +213,7 @@  FIXTURE_SETUP(iommufd_ioas)
 
 	for (i = 0; i != variant->mock_domains; i++) {
 		test_cmd_mock_domain(self->ioas_id, &self->stdev_id,
-				     &self->hwpt_id, NULL);
+				     &self->hwpt_id, &self->device_id);
 		self->base_iova = MOCK_APERTURE_START;
 	}
 }
@@ -290,6 +292,19 @@  TEST_F(iommufd_ioas, ioas_area_auto_destroy)
 	}
 }
 
+TEST_F(iommufd_ioas, get_hw_info)
+{
+	struct iommu_test_hw_info info;
+
+	if (self->device_id) {
+		test_cmd_get_hw_info(self->device_id, sizeof(info), &info);
+		assert(info.test_reg == IOMMU_HW_INFO_SELFTEST_REGVAL);
+	} else {
+		test_err_get_hw_info(ENOENT, self->device_id,
+				     sizeof(info), &info);
+	}
+}
+
 TEST_F(iommufd_ioas, area)
 {
 	int i;
diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h
index 70353e68e599..d6d223435881 100644
--- a/tools/testing/selftests/iommu/iommufd_utils.h
+++ b/tools/testing/selftests/iommu/iommufd_utils.h
@@ -348,3 +348,29 @@  static void teardown_iommufd(int fd, struct __test_metadata *_metadata)
 	})
 
 #endif
+
+static int _test_cmd_get_hw_info(int fd, __u32 device_id,
+				 void *data, size_t data_len)
+{
+	struct iommu_hw_info cmd = {
+		.size = sizeof(cmd),
+		.dev_id = device_id,
+		.data_len = data_len,
+		.data_ptr = (uint64_t)data,
+	};
+	int ret;
+
+	ret = ioctl(fd, IOMMU_GET_HW_INFO, &cmd);
+	if (ret)
+		return ret;
+	return 0;
+}
+
+#define test_cmd_get_hw_info(device_id, data_len, data)         \
+	ASSERT_EQ(0, _test_cmd_get_hw_info(self->fd, device_id, \
+					   data, data_len))
+
+#define test_err_get_hw_info(_errno, device_id, data_len, data) \
+	EXPECT_ERRNO(_errno,                                    \
+		     _test_cmd_get_hw_info(self->fd, device_id, \
+					   data, data_len))