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38 * determine if VFIO is present on the system
41 #include <linux/version.h>
42 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
43 #include <linux/vfio.h>
45 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0)
46 #define RTE_PCI_MSIX_TABLE_BIR 0x7
47 #define RTE_PCI_MSIX_TABLE_OFFSET 0xfffffff8
48 #define RTE_PCI_MSIX_FLAGS_QSIZE 0x07ff
50 #define RTE_PCI_MSIX_TABLE_BIR PCI_MSIX_TABLE_BIR
51 #define RTE_PCI_MSIX_TABLE_OFFSET PCI_MSIX_TABLE_OFFSET
52 #define RTE_PCI_MSIX_FLAGS_QSIZE PCI_MSIX_FLAGS_QSIZE
55 #define RTE_VFIO_TYPE1 VFIO_TYPE1_IOMMU
57 #ifndef VFIO_SPAPR_TCE_v2_IOMMU
58 #define RTE_VFIO_SPAPR 7
59 #define VFIO_IOMMU_SPAPR_REGISTER_MEMORY _IO(VFIO_TYPE, VFIO_BASE + 17)
60 #define VFIO_IOMMU_SPAPR_TCE_CREATE _IO(VFIO_TYPE, VFIO_BASE + 19)
61 #define VFIO_IOMMU_SPAPR_TCE_REMOVE _IO(VFIO_TYPE, VFIO_BASE + 20)
63 struct vfio_iommu_spapr_register_memory {
70 struct vfio_iommu_spapr_tce_create {
77 struct vfio_iommu_spapr_tce_remove {
82 struct vfio_iommu_spapr_tce_ddw_info {
84 uint32_t max_dynamic_windows_supported;
88 /* SPAPR_v2 is not present, but SPAPR might be */
89 #ifndef VFIO_SPAPR_TCE_IOMMU
90 #define VFIO_IOMMU_SPAPR_TCE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)
92 struct vfio_iommu_spapr_tce_info {
95 uint32_t dma32_window_start;
96 uint32_t dma32_window_size;
97 struct vfio_iommu_spapr_tce_ddw_info ddw;
99 #endif /* VFIO_SPAPR_TCE_IOMMU */
101 #else /* VFIO_SPAPR_TCE_v2_IOMMU */
102 #define RTE_VFIO_SPAPR VFIO_SPAPR_TCE_v2_IOMMU
105 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)
106 #define RTE_VFIO_NOIOMMU 8
108 #define RTE_VFIO_NOIOMMU VFIO_NOIOMMU_IOMMU
111 #define VFIO_MAX_GROUPS 64
114 * Function prototypes for VFIO multiprocess sync functions
116 int vfio_mp_sync_send_request(int socket, int req);
117 int vfio_mp_sync_receive_request(int socket);
118 int vfio_mp_sync_send_fd(int socket, int fd);
119 int vfio_mp_sync_receive_fd(int socket);
120 int vfio_mp_sync_connect_to_primary(void);
123 * we don't need to store device fd's anywhere since they can be obtained from
124 * the group fd via an ioctl() call.
134 int vfio_container_fd;
135 int vfio_active_groups;
136 struct vfio_group vfio_groups[VFIO_MAX_GROUPS];
139 #define VFIO_DIR "/dev/vfio"
140 #define VFIO_CONTAINER_PATH "/dev/vfio/vfio"
141 #define VFIO_GROUP_FMT "/dev/vfio/%u"
142 #define VFIO_NOIOMMU_GROUP_FMT "/dev/vfio/noiommu-%u"
143 #define VFIO_GET_REGION_ADDR(x) ((uint64_t) x << 40ULL)
144 #define VFIO_GET_REGION_IDX(x) (x >> 40)
146 /* DMA mapping function prototype.
147 * Takes VFIO container fd as a parameter.
148 * Returns 0 on success, -1 on error.
150 typedef int (*vfio_dma_func_t)(int);
152 struct vfio_iommu_type {
155 vfio_dma_func_t dma_map_func;
158 /* pick IOMMU type. returns a pointer to vfio_iommu_type or NULL for error */
159 const struct vfio_iommu_type *
160 vfio_set_iommu_type(int vfio_container_fd);
162 /* check if we have any supported extensions */
164 vfio_has_supported_extensions(int vfio_container_fd);
166 /* open container fd or get an existing one */
168 vfio_get_container_fd(void);
170 /* parse IOMMU group number for a device
171 * returns 1 on success, -1 for errors, 0 for non-existent group
174 vfio_get_group_no(const char *sysfs_base,
175 const char *dev_addr, int *iommu_group_no);
177 /* open group fd or get an existing one */
179 vfio_get_group_fd(int iommu_group_no);
181 /* remove group fd from internal VFIO group fd array */
183 clear_group(int vfio_group_fd);
186 * Setup vfio_cfg for the device identified by its address. It discovers
187 * the configured I/O MMU groups or sets a new one for the device. If a new
188 * groups is assigned, the DMA mapping is performed.
189 * Returns 0 on success, a negative value on failure and a positive value in
190 * case the given device cannot be managed this way.
192 int vfio_setup_device(const char *sysfs_base, const char *dev_addr,
193 int *vfio_dev_fd, struct vfio_device_info *device_info);
195 int vfio_release_device(const char *sysfs_base, const char *dev_addr, int fd);
197 int vfio_enable(const char *modname);
198 int vfio_is_enabled(const char *modname);
200 int pci_vfio_enable(void);
201 int pci_vfio_is_enabled(void);
203 int vfio_mp_sync_setup(void);
205 #define SOCKET_REQ_CONTAINER 0x100
206 #define SOCKET_REQ_GROUP 0x200
207 #define SOCKET_CLR_GROUP 0x300
208 #define SOCKET_OK 0x0
209 #define SOCKET_NO_FD 0x1
210 #define SOCKET_ERR 0xFF
213 #endif /* kernel version */
214 #endif /* RTE_EAL_VFIO */
216 #endif /* EAL_VFIO_H_ */