vfio: enable independently of PCI bus

[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..4bab363 100644 (file)
--- a/lib/librte_eal/linuxapp/eal/eal_vfio.h
+++ b/lib/librte_eal/linuxapp/eal/eal_vfio.h
@@ -54,6 +54,62 @@
 
 #define RTE_VFIO_TYPE1 VFIO_TYPE1_IOMMU
 
+#ifndef VFIO_SPAPR_TCE_v2_IOMMU
+#define RTE_VFIO_SPAPR 7
+#define VFIO_IOMMU_SPAPR_REGISTER_MEMORY _IO(VFIO_TYPE, VFIO_BASE + 17)
+#define VFIO_IOMMU_SPAPR_TCE_CREATE _IO(VFIO_TYPE, VFIO_BASE + 19)
+#define VFIO_IOMMU_SPAPR_TCE_REMOVE _IO(VFIO_TYPE, VFIO_BASE + 20)
+
+struct vfio_iommu_spapr_register_memory {
+       uint32_t argsz;
+       uint32_t flags;
+       uint64_t vaddr;
+       uint64_t size;
+};
+
+struct vfio_iommu_spapr_tce_create {
+       uint32_t argsz;
+       uint32_t flags;
+       /* in */
+       uint32_t page_shift;
+       uint32_t __resv1;
+       uint64_t window_size;
+       uint32_t levels;
+       uint32_t __resv2;
+       /* out */
+       uint64_t start_addr;
+};
+
+struct vfio_iommu_spapr_tce_remove {
+       uint32_t argsz;
+       uint32_t flags;
+       /* in */
+       uint64_t start_addr;
+};
+
+struct vfio_iommu_spapr_tce_ddw_info {
+       uint64_t pgsizes;
+       uint32_t max_dynamic_windows_supported;
+       uint32_t levels;
+};
+
+/* SPAPR_v2 is not present, but SPAPR might be */
+#ifndef VFIO_SPAPR_TCE_IOMMU
+#define VFIO_IOMMU_SPAPR_TCE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)
+
+struct vfio_iommu_spapr_tce_info {
+       uint32_t argsz;
+       uint32_t flags;
+       uint32_t dma32_window_start;
+       uint32_t dma32_window_size;
+       struct vfio_iommu_spapr_tce_ddw_info ddw;
+};
+#endif /* VFIO_SPAPR_TCE_IOMMU */
+
+#else /* VFIO_SPAPR_TCE_v2_IOMMU */
+#define RTE_VFIO_SPAPR VFIO_SPAPR_TCE_v2_IOMMU
+#endif
+
 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)
 #define RTE_VFIO_NOIOMMU 8
 #else
@@ -78,13 +134,13 @@ int vfio_mp_sync_connect_to_primary(void);
 struct vfio_group {
        int group_no;
        int fd;
+       int devices;
 };
 
 struct vfio_config {
        int vfio_enabled;
        int vfio_container_fd;
-       int vfio_container_has_dma;
-       int vfio_group_idx;
+       int vfio_active_groups;
        struct vfio_group vfio_groups[VFIO_MAX_GROUPS];
 };
 
@@ -94,9 +150,72 @@ struct vfio_config {
 #define VFIO_NOIOMMU_GROUP_FMT "/dev/vfio/noiommu-%u"
 #define VFIO_GET_REGION_ADDR(x) ((uint64_t) x << 40ULL)
 #define VFIO_GET_REGION_IDX(x) (x >> 40)
+#define VFIO_NOIOMMU_MODE      \
+       "/sys/module/vfio/parameters/enable_unsafe_noiommu_mode"
+
+/* 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);
+
+/* remove group fd from internal VFIO group fd array */
+int
+clear_group(int vfio_group_fd);
+
+/**
+ * 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_release_device(const char *sysfs_base, const char *dev_addr, int fd);
+
+int vfio_enable(const char *modname);
+int vfio_is_enabled(const char *modname);
+
+int pci_vfio_is_enabled(void);
+
+int vfio_mp_sync_setup(void);
+
+int vfio_noiommu_is_enabled(void);
 
 #define SOCKET_REQ_CONTAINER 0x100
 #define SOCKET_REQ_GROUP 0x200
+#define SOCKET_CLR_GROUP 0x300
 #define SOCKET_OK 0x0
 #define SOCKET_NO_FD 0x1
 #define SOCKET_ERR 0xFF