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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 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)
58 #define RTE_VFIO_NOIOMMU 8
60 #define RTE_VFIO_NOIOMMU VFIO_NOIOMMU_IOMMU
63 #define VFIO_MAX_GROUPS 64
66 * Function prototypes for VFIO multiprocess sync functions
68 int vfio_mp_sync_send_request(int socket, int req);
69 int vfio_mp_sync_receive_request(int socket);
70 int vfio_mp_sync_send_fd(int socket, int fd);
71 int vfio_mp_sync_receive_fd(int socket);
72 int vfio_mp_sync_connect_to_primary(void);
75 * we don't need to store device fd's anywhere since they can be obtained from
76 * the group fd via an ioctl() call.
85 int vfio_container_fd;
86 int vfio_container_has_dma;
88 struct vfio_group vfio_groups[VFIO_MAX_GROUPS];
91 #define VFIO_DIR "/dev/vfio"
92 #define VFIO_CONTAINER_PATH "/dev/vfio/vfio"
93 #define VFIO_GROUP_FMT "/dev/vfio/%u"
94 #define VFIO_NOIOMMU_GROUP_FMT "/dev/vfio/noiommu-%u"
95 #define VFIO_GET_REGION_ADDR(x) ((uint64_t) x << 40ULL)
96 #define VFIO_GET_REGION_IDX(x) (x >> 40)
98 /* DMA mapping function prototype.
99 * Takes VFIO container fd as a parameter.
100 * Returns 0 on success, -1 on error.
102 typedef int (*vfio_dma_func_t)(int);
104 struct vfio_iommu_type {
107 vfio_dma_func_t dma_map_func;
110 /* pick IOMMU type. returns a pointer to vfio_iommu_type or NULL for error */
111 const struct vfio_iommu_type *
112 vfio_set_iommu_type(int vfio_container_fd);
114 /* check if we have any supported extensions */
116 vfio_has_supported_extensions(int vfio_container_fd);
118 /* open container fd or get an existing one */
120 vfio_get_container_fd(void);
122 /* parse IOMMU group number for a device
123 * returns 1 on success, -1 for errors, 0 for non-existent group
126 vfio_get_group_no(const char *sysfs_base,
127 const char *dev_addr, int *iommu_group_no);
129 /* open group fd or get an existing one */
131 vfio_get_group_fd(int iommu_group_no);
134 * Setup vfio_cfg for the device identified by its address. It discovers
135 * the configured I/O MMU groups or sets a new one for the device. If a new
136 * groups is assigned, the DMA mapping is performed.
137 * Returns 0 on success, a negative value on failure and a positive value in
138 * case the given device cannot be managed this way.
140 int vfio_setup_device(const char *sysfs_base, const char *dev_addr,
141 int *vfio_dev_fd, struct vfio_device_info *device_info);
143 int vfio_enable(const char *modname);
144 int vfio_is_enabled(const char *modname);
146 int vfio_type1_dma_map(int);
147 int vfio_noiommu_dma_map(int);
149 /* IOMMU types we support */
150 static const struct vfio_iommu_type iommu_types[] = {
151 /* x86 IOMMU, otherwise known as type 1 */
152 { RTE_VFIO_TYPE1, "Type 1", &vfio_type1_dma_map},
153 /* IOMMU-less mode */
154 { RTE_VFIO_NOIOMMU, "No-IOMMU", &vfio_noiommu_dma_map},
157 #define SOCKET_REQ_CONTAINER 0x100
158 #define SOCKET_REQ_GROUP 0x200
159 #define SOCKET_OK 0x0
160 #define SOCKET_NO_FD 0x1
161 #define SOCKET_ERR 0xFF
164 #endif /* kernel version */
165 #endif /* RTE_EAL_VFIO */
167 #endif /* EAL_VFIO_H_ */