* RTE VFIO. This library provides various VFIO related utility functions.
*/
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
/*
* determine if VFIO is present on the system
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
#define VFIO_PRESENT
#endif /* kernel version >= 3.6.0 */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 0, 0)
+#define HAVE_VFIO_DEV_REQ_INTERFACE
+#endif /* kernel version >= 4.0.0 */
#endif /* RTE_EAL_VFIO */
#ifdef VFIO_PRESENT
#define VFIO_NOIOMMU_MODE \
"/sys/module/vfio/parameters/enable_unsafe_noiommu_mode"
-#ifdef __cplusplus
-extern "C" {
-#endif
-
/* NOIOMMU is defined from kernel version 4.5 onwards */
#ifdef VFIO_NOIOMMU_IOMMU
#define RTE_VFIO_NOIOMMU VFIO_NOIOMMU_IOMMU
#define RTE_VFIO_NOIOMMU 8
#endif
+/*
+ * capabilities are only supported on kernel 4.6+. there were also some API
+ * changes as well, so add a macro to get cap offset.
+ */
+#ifdef VFIO_REGION_INFO_FLAG_CAPS
+#define RTE_VFIO_INFO_FLAG_CAPS VFIO_REGION_INFO_FLAG_CAPS
+#define VFIO_CAP_OFFSET(x) (x->cap_offset)
+#else
+#define RTE_VFIO_INFO_FLAG_CAPS (1 << 3)
+#define VFIO_CAP_OFFSET(x) (x->resv)
+struct vfio_info_cap_header {
+ uint16_t id;
+ uint16_t version;
+ uint32_t next;
+};
+#endif
+
+/* kernels 4.16+ can map BAR containing MSI-X table */
+#ifdef VFIO_REGION_INFO_CAP_MSIX_MAPPABLE
+#define RTE_VFIO_CAP_MSIX_MAPPABLE VFIO_REGION_INFO_CAP_MSIX_MAPPABLE
+#else
+#define RTE_VFIO_CAP_MSIX_MAPPABLE 3
+#endif
+
+#else /* not VFIO_PRESENT */
+
+/* we don't need an actual definition, only pointer is used */
+struct vfio_device_info;
+
+#endif /* VFIO_PRESENT */
+
+#define RTE_VFIO_DEFAULT_CONTAINER_FD (-1)
+
/**
* Setup vfio_cfg for the device identified by its address.
* It discovers the configured I/O MMU groups or sets a new one for the device.
* an error on BSD.
*
* @param vfio_group_fd
- * VFIO Grouup FD.
+ * VFIO Group FD.
*
* @return
* 0 on success.
int
rte_vfio_clear_group(int vfio_group_fd);
-/**
- * Map memory region for use with VFIO.
- *
- * @note requires at least one device to be attached at the time of mapping.
- *
- * @param vaddr
- * Starting virtual address of memory to be mapped.
- *
- * @param iova
- * Starting IOVA address of memory to be mapped.
- *
- * @param len
- * Length of memory segment being mapped.
- *
- * @return
- * 0 if success.
- * -1 on error.
- */
-int __rte_experimental
-rte_vfio_dma_map(uint64_t vaddr, uint64_t iova, uint64_t len);
-
-
-/**
- * Unmap memory region from VFIO.
- *
- * @param vaddr
- * Starting virtual address of memory to be unmapped.
- *
- * @param iova
- * Starting IOVA address of memory to be unmapped.
- *
- * @param len
- * Length of memory segment being unmapped.
- *
- * @return
- * 0 if success.
- * -1 on error.
- */
-
-int __rte_experimental
-rte_vfio_dma_unmap(uint64_t vaddr, uint64_t iova, uint64_t len);
/**
* Parse IOMMU group number for a device
*
* 0 for non-existent group or VFIO
* <0 for errors
*/
-int __rte_experimental
+int
rte_vfio_get_group_num(const char *sysfs_base,
const char *dev_addr, int *iommu_group_num);
/**
- * Open VFIO container fd or get an existing one
+ * Open a new VFIO container fd
*
* This function is only relevant to linux and will return
* an error on BSD.
* > 0 container fd
* < 0 for errors
*/
-int __rte_experimental
+int
rte_vfio_get_container_fd(void);
/**
* > 0 group fd
* < 0 for errors
*/
-int __rte_experimental
+int
rte_vfio_get_group_fd(int iommu_group_num);
+/**
+ * Create a new container for device binding.
+ *
+ * @note Any newly allocated DPDK memory will not be mapped into these
+ * containers by default, user needs to manage DMA mappings for
+ * any container created by this API.
+ *
+ * @note When creating containers using this API, the container will only be
+ * available in the process that has created it. Sharing containers and
+ * devices between multiple processes is not supported.
+ *
+ * @return
+ * the container fd if successful
+ * <0 if failed
+ */
+int
+rte_vfio_container_create(void);
+
+/**
+ * Destroy the container, unbind all vfio groups within it.
+ *
+ * @param container_fd
+ * the container fd to destroy
+ *
+ * @return
+ * 0 if successful
+ * <0 if failed
+ */
+int
+rte_vfio_container_destroy(int container_fd);
+
+/**
+ * Bind a IOMMU group to a container.
+ *
+ * @param container_fd
+ * the container's fd
+ *
+ * @param iommu_group_num
+ * the iommu group number to bind to container
+ *
+ * @return
+ * group fd if successful
+ * <0 if failed
+ */
+int
+rte_vfio_container_group_bind(int container_fd, int iommu_group_num);
+
+/**
+ * Unbind a IOMMU group from a container.
+ *
+ * @param container_fd
+ * the container fd of container
+ *
+ * @param iommu_group_num
+ * the iommu group number to delete from container
+ *
+ * @return
+ * 0 if successful
+ * <0 if failed
+ */
+int
+rte_vfio_container_group_unbind(int container_fd, int iommu_group_num);
+
+/**
+ * Perform DMA mapping for devices in a container.
+ *
+ * @param container_fd
+ * the specified container fd. Use RTE_VFIO_DEFAULT_CONTAINER_FD to
+ * use the default container.
+ *
+ * @param vaddr
+ * Starting virtual address of memory to be mapped.
+ *
+ * @param iova
+ * Starting IOVA address of memory to be mapped.
+ *
+ * @param len
+ * Length of memory segment being mapped.
+ *
+ * @return
+ * 0 if successful
+ * <0 if failed
+ */
+int
+rte_vfio_container_dma_map(int container_fd, uint64_t vaddr,
+ uint64_t iova, uint64_t len);
+
+/**
+ * Perform DMA unmapping for devices in a container.
+ *
+ * @param container_fd
+ * the specified container fd. Use RTE_VFIO_DEFAULT_CONTAINER_FD to
+ * use the default container.
+ *
+ * @param vaddr
+ * Starting virtual address of memory to be unmapped.
+ *
+ * @param iova
+ * Starting IOVA address of memory to be unmapped.
+ *
+ * @param len
+ * Length of memory segment being unmapped.
+ *
+ * @return
+ * 0 if successful
+ * <0 if failed
+ */
+int
+rte_vfio_container_dma_unmap(int container_fd, uint64_t vaddr,
+ uint64_t iova, uint64_t len);
+
#ifdef __cplusplus
}
#endif
-#endif /* VFIO_PRESENT */
-
#endif /* _RTE_VFIO_H_ */
git.droids-corp.org / dpdk.git / blobdiff