diff mbox series

[RFC,2/6] bus/cdx: add dma map and unmap support

Message ID 20230124140746.594066-3-nipun.gupta@amd.com (mailing list archive)
State Superseded, archived
Delegated to: Thomas Monjalon
Headers
Series add support for CDX bus |

Checks

Context Check Description
ci/checkpatch warning coding style issues

Commit Message

Gupta, Nipun Jan. 24, 2023, 2:07 p.m. UTC 
  CDX bus can use VFIO interface for mapping and unmapping
of DMA addresses in the IOMMU. This change adds the callback
support for map and unmap APIs as well as fetching the IOMMU
class.

Signed-off-by: Nipun Gupta <nipun.gupta@amd.com>
---
 drivers/bus/cdx/cdx.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
diff mbox series

Patch

diff --git a/drivers/bus/cdx/cdx.c b/drivers/bus/cdx/cdx.c
index 4c85c5dc01..cb04639b0d 100644
--- a/drivers/bus/cdx/cdx.c
+++ b/drivers/bus/cdx/cdx.c
@@ -549,12 +549,52 @@  cdx_find_device(const struct rte_device *start, rte_dev_cmp_t cmp,
 	return NULL;
 }
 
+static int
+cdx_dma_map(struct rte_device *dev, void *addr, uint64_t iova, size_t len)
+{
+	struct rte_cdx_device *cdx_dev = RTE_DEV_TO_CDX_DEV(dev);
+
+	if (!cdx_dev) {
+		rte_errno = EINVAL;
+		return -1;
+	}
+
+	return rte_vfio_container_dma_map(RTE_VFIO_DEFAULT_CONTAINER_FD,
+					  (uintptr_t)addr, iova, len);
+}
+
+static int
+cdx_dma_unmap(struct rte_device *dev, void *addr, uint64_t iova, size_t len)
+{
+	struct rte_cdx_device *cdx_dev = RTE_DEV_TO_CDX_DEV(dev);
+
+	if (!cdx_dev) {
+		rte_errno = EINVAL;
+		return -1;
+	}
+
+	return rte_vfio_container_dma_unmap(RTE_VFIO_DEFAULT_CONTAINER_FD,
+					    (uintptr_t)addr, iova, len);
+}
+
+static enum rte_iova_mode
+rte_cdx_get_iommu_class(void)
+{
+	if (TAILQ_EMPTY(&rte_cdx_bus.device_list))
+		return RTE_IOVA_DC;
+
+	return RTE_IOVA_VA;
+}
+
 struct rte_cdx_bus rte_cdx_bus = {
 	.bus = {
 		.scan = rte_cdx_scan,
 		.probe = cdx_probe,
 		.find_device = cdx_find_device,
 		.parse = cdx_parse,
+		.dma_map = cdx_dma_map,
+		.dma_unmap = cdx_dma_unmap,
+		.get_iommu_class = rte_cdx_get_iommu_class,
 	},
 	.device_list = TAILQ_HEAD_INITIALIZER(rte_cdx_bus.device_list),
 	.driver_list = TAILQ_HEAD_INITIALIZER(rte_cdx_bus.driver_list),