vfio: rework initialization to be extendable

[dpdk.git] / lib / librte_eal / linuxapp / eal / eal_vfio.h

diff --git a/lib/librte_eal/linuxapp/eal/eal_vfio.h b/lib/librte_eal/linuxapp/eal/eal_vfio.h
index 4468c95..29f7f3e 100644 (file)
--- a/lib/librte_eal/linuxapp/eal/eal_vfio.h
+++ b/lib/librte_eal/linuxapp/eal/eal_vfio.h
@@ -95,6 +95,59 @@ struct vfio_config {
 #define VFIO_GET_REGION_ADDR(x) ((uint64_t) x << 40ULL)
 #define VFIO_GET_REGION_IDX(x) (x >> 40)
 
+/* DMA mapping function prototype.
+ * Takes VFIO container fd as a parameter.
+ * Returns 0 on success, -1 on error.
+ * */
+typedef int (*vfio_dma_func_t)(int);
+
+struct vfio_iommu_type {
+       int type_id;
+       const char *name;
+       vfio_dma_func_t dma_map_func;
+};
+
+/* pick IOMMU type. returns a pointer to vfio_iommu_type or NULL for error */
+const struct vfio_iommu_type *
+vfio_set_iommu_type(int vfio_container_fd);
+
+/* check if we have any supported extensions */
+int
+vfio_has_supported_extensions(int vfio_container_fd);
+
+/* open container fd or get an existing one */
+int
+vfio_get_container_fd(void);
+
+/* parse IOMMU group number for a device
+ * returns 1 on success, -1 for errors, 0 for non-existent group
+ */
+int
+vfio_get_group_no(const char *sysfs_base,
+               const char *dev_addr, int *iommu_group_no);
+
+/* open group fd or get an existing one */
+int
+vfio_get_group_fd(int iommu_group_no);
+
+/**
+ * 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. If a new
+ * groups is assigned, the DMA mapping is performed.
+ * Returns 0 on success, a negative value on failure and a positive value in
+ * case the given device cannot be managed this way.
+ */
+int vfio_setup_device(const char *sysfs_base, const char *dev_addr,
+               int *vfio_dev_fd, struct vfio_device_info *device_info);
+
+int vfio_enable(const char *modname);
+int vfio_is_enabled(const char *modname);
+
+int pci_vfio_enable(void);
+int pci_vfio_is_enabled(void);
+
+int vfio_mp_sync_setup(void);
+
 #define SOCKET_REQ_CONTAINER 0x100
 #define SOCKET_REQ_GROUP 0x200
 #define SOCKET_OK 0x0