Add support for DMA map/unmap operations.
Signed-off-by: Tomasz Duszynski <tduszyn...@marvell.com>
---
.../raw/vfio_platform/rte_pmd_vfio_platform.h | 40 +++++++++++
drivers/raw/vfio_platform/version.map | 2 +
drivers/raw/vfio_platform/vfio_platform.c | 67 +++++++++++++++++++
3 files changed, 109 insertions(+)
diff --git a/drivers/raw/vfio_platform/rte_pmd_vfio_platform.h
b/drivers/raw/vfio_platform/rte_pmd_vfio_platform.h
index 377cebde08..e1c194c46d 100644
--- a/drivers/raw/vfio_platform/rte_pmd_vfio_platform.h
+++ b/drivers/raw/vfio_platform/rte_pmd_vfio_platform.h
@@ -82,6 +82,46 @@ __rte_experimental
int
rte_pmd_vfio_platform_container_destroy(int container);
+/**
+ * Map DMA memory.
+ *
+ * @param dev_id
+ * Device identifier.
+ * @param addr
+ * Virtual address to map.
+ * @param iova
+ * IOVA address to map.
+ * @param len
+ * Length of the memory segment being mapped.
+ *
+ * @return
+ * 0 on success
+ * <0 on failure and rte_errno is set
+ */
+__rte_experimental
+int
+rte_pmd_vfio_platform_dma_map(uint16_t dev_id, void *addr, uint64_t iova,
size_t len);
+
+/**
+ * Remove DMA memory mapping.
+ *
+ * @param dev_id
+ * Device identifier.
+ * @param addr
+ * Virtual address to map.
+ * @param iova
+ * IOVA address to map.
+ * @param len
+ * Length of the memory segment being mapped.
+ *
+ * @return
+ * 0 on success
+ * <0 on failure and rte_errno is set
+ */
+__rte_experimental
+int
+rte_pmd_vfio_platform_dma_unmap(uint16_t dev_id, void *addr, uint64_t iova,
size_t len);
+
#ifdef __cplusplus
}
#endif
diff --git a/drivers/raw/vfio_platform/version.map
b/drivers/raw/vfio_platform/version.map
index 2aea50f4c1..1b54459183 100644
--- a/drivers/raw/vfio_platform/version.map
+++ b/drivers/raw/vfio_platform/version.map
@@ -7,4 +7,6 @@ EXPERIMENTAL {
rte_pmd_vfio_platform_container_create;
rte_pmd_vfio_platform_container_destroy;
+ rte_pmd_vfio_platform_dma_map;
+ rte_pmd_vfio_platform_dma_unmap;
};
diff --git a/drivers/raw/vfio_platform/vfio_platform.c
b/drivers/raw/vfio_platform/vfio_platform.c
index 8148dce06b..966f9f177e 100644
--- a/drivers/raw/vfio_platform/vfio_platform.c
+++ b/drivers/raw/vfio_platform/vfio_platform.c
@@ -94,6 +94,45 @@ rte_pmd_vfio_platform_container_destroy(int container)
return 0;
}
+static struct rte_rawdev *
+rawdev_from_dev_id(uint16_t dev_id)
+{
+ if (!rte_rawdev_pmd_is_valid_dev(dev_id))
+ return NULL;
+
+ return &rte_rawdevs[dev_id];
+}
+
+int
+rte_pmd_vfio_platform_dma_map(uint16_t dev_id, void *addr, uint64_t iova,
size_t len)
+{
+ struct rte_rawdev *rawdev;
+
+ rawdev = rawdev_from_dev_id(dev_id);
+ if (!rawdev) {
+ rte_errno = ENODEV;
+
+ return -1;
+ }
+
+ return rte_dev_dma_map(rawdev->device, addr, iova, len);
+}
+
+int
+rte_pmd_vfio_platform_dma_unmap(uint16_t dev_id, void *addr, uint64_t iova,
size_t len)
+{
+ struct rte_rawdev *rawdev;
+
+ rawdev = rawdev_from_dev_id(dev_id);
+ if (!rawdev) {
+ rte_errno = ENODEV;
+
+ return -1;
+ }
+
+ return rte_dev_dma_unmap(rawdev->device, addr, iova, len);
+}
+
static int
vfio_rawdev_dev_info_get(struct rte_rawdev *dev, rte_rawdev_obj_t dev_info,
size_t dev_private_size)
@@ -371,9 +410,37 @@ vfio_platform_remove(struct rte_platform_device *pdev)
return ret;
}
+static int
+vfio_platform_dma_map(struct rte_platform_device *pdev, void *addr, uint64_t
iova, size_t len)
+{
+ struct vfio_platform *plat = pdev->driver_data;
+ int ret;
+
+ ret = rte_vfio_container_dma_map(container_fd(plat->container),
(uint64_t)addr, iova, len);
+ if (ret)
+ return -EFAULT;
+
+ return 0;
+}
+
+static int
+vfio_platform_dma_unmap(struct rte_platform_device *pdev, void *addr, uint64_t
iova, size_t len)
+{
+ struct vfio_platform *plat = pdev->driver_data;
+ int ret;
+
+ ret = rte_vfio_container_dma_unmap(container_fd(plat->container),
(uint64_t)addr, iova, len);
+ if (ret)
+ return -EFAULT;
+
+ return 0;
+}
+
static struct rte_platform_driver vfio_platform = {
.probe = vfio_platform_probe,
.remove = vfio_platform_remove,
+ .dma_map = vfio_platform_dma_map,
+ .dma_unmap = vfio_platform_dma_unmap,
};
RTE_PMD_REGISTER_PLATFORM(vfio_platform, vfio_platform);
--
2.25.1
