ceph/src/seastar/dpdk/lib/librte_eal/linux/eal/eal_vfio.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #ifndef EAL_VFIO_H_
   6 #define EAL_VFIO_H_
   7
   8 #include <rte_common.h>
   9
  10 /*
  11  * determine if VFIO is present on the system
  12  */
  13 #if !defined(VFIO_PRESENT) && defined(RTE_EAL_VFIO)
  14 #include <linux/version.h>
  15 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 6, 0)
  16 #define VFIO_PRESENT
  17 #else
  18 #pragma message("VFIO configured but not supported by this kernel, disabling.")
  19 #endif /* kernel version >= 3.6.0 */
  20 #endif /* RTE_EAL_VFIO */
  21
  22 #ifdef VFIO_PRESENT
  23
  24 #include <stdint.h>
  25 #include <linux/vfio.h>
  26
  27 #define RTE_VFIO_TYPE1 VFIO_TYPE1_IOMMU
  28
  29 #ifndef VFIO_SPAPR_TCE_v2_IOMMU
  30 #define RTE_VFIO_SPAPR 7
  31 #define VFIO_IOMMU_SPAPR_REGISTER_MEMORY _IO(VFIO_TYPE, VFIO_BASE + 17)
  32 #define VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY _IO(VFIO_TYPE, VFIO_BASE + 18)
  33 #define VFIO_IOMMU_SPAPR_TCE_CREATE _IO(VFIO_TYPE, VFIO_BASE + 19)
  34 #define VFIO_IOMMU_SPAPR_TCE_REMOVE _IO(VFIO_TYPE, VFIO_BASE + 20)
  35
  36 struct vfio_iommu_spapr_register_memory {
  37         uint32_t argsz;
  38         uint32_t flags;
  39         uint64_t vaddr;
  40         uint64_t size;
  41 };
  42
  43 struct vfio_iommu_spapr_tce_create {
  44         uint32_t argsz;
  45         uint32_t flags;
  46         /* in */
  47         uint32_t page_shift;
  48         uint32_t __resv1;
  49         uint64_t window_size;
  50         uint32_t levels;
  51         uint32_t __resv2;
  52         /* out */
  53         uint64_t start_addr;
  54 };
  55
  56 struct vfio_iommu_spapr_tce_remove {
  57         uint32_t argsz;
  58         uint32_t flags;
  59         /* in */
  60         uint64_t start_addr;
  61 };
  62
  63 struct vfio_iommu_spapr_tce_ddw_info {
  64         uint64_t pgsizes;
  65         uint32_t max_dynamic_windows_supported;
  66         uint32_t levels;
  67 };
  68
  69 /* SPAPR_v2 is not present, but SPAPR might be */
  70 #ifndef VFIO_SPAPR_TCE_IOMMU
  71 #define VFIO_IOMMU_SPAPR_TCE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)
  72
  73 struct vfio_iommu_spapr_tce_info {
  74         uint32_t argsz;
  75         uint32_t flags;
  76         uint32_t dma32_window_start;
  77         uint32_t dma32_window_size;
  78         struct vfio_iommu_spapr_tce_ddw_info ddw;
  79 };
  80 #endif /* VFIO_SPAPR_TCE_IOMMU */
  81
  82 #else /* VFIO_SPAPR_TCE_v2_IOMMU */
  83 #define RTE_VFIO_SPAPR VFIO_SPAPR_TCE_v2_IOMMU
  84 #endif
  85
  86 #define VFIO_MAX_GROUPS RTE_MAX_VFIO_GROUPS
  87 #define VFIO_MAX_CONTAINERS RTE_MAX_VFIO_CONTAINERS
  88
  89 /*
  90  * we don't need to store device fd's anywhere since they can be obtained from
  91  * the group fd via an ioctl() call.
  92  */
  93 struct vfio_group {
  94         int group_num;
  95         int fd;
  96         int devices;
  97 };
  98
  99 /* DMA mapping function prototype.
 100  * Takes VFIO container fd as a parameter.
 101  * Returns 0 on success, -1 on error.
 102  * */
 103 typedef int (*vfio_dma_func_t)(int);
 104
 105 /* Custom memory region DMA mapping function prototype.
 106  * Takes VFIO container fd, virtual address, phisical address, length and
 107  * operation type (0 to unmap 1 for map) as a parameters.
 108  * Returns 0 on success, -1 on error.
 109  **/
 110 typedef int (*vfio_dma_user_func_t)(int fd, uint64_t vaddr, uint64_t iova,
 111                 uint64_t len, int do_map);
 112
 113 struct vfio_iommu_type {
 114         int type_id;
 115         const char *name;
 116         vfio_dma_user_func_t dma_user_map_func;
 117         vfio_dma_func_t dma_map_func;
 118 };
 119
 120 /* get the vfio container that devices are bound to by default */
 121 int vfio_get_default_container_fd(void);
 122
 123 /* pick IOMMU type. returns a pointer to vfio_iommu_type or NULL for error */
 124 const struct vfio_iommu_type *
 125 vfio_set_iommu_type(int vfio_container_fd);
 126
 127 int
 128 vfio_get_iommu_type(void);
 129
 130 /* check if we have any supported extensions */
 131 int
 132 vfio_has_supported_extensions(int vfio_container_fd);
 133
 134 int vfio_mp_sync_setup(void);
 135
 136 #define EAL_VFIO_MP "eal_vfio_mp_sync"
 137
 138 #define SOCKET_REQ_CONTAINER 0x100
 139 #define SOCKET_REQ_GROUP 0x200
 140 #define SOCKET_REQ_DEFAULT_CONTAINER 0x400
 141 #define SOCKET_REQ_IOMMU_TYPE 0x800
 142 #define SOCKET_OK 0x0
 143 #define SOCKET_NO_FD 0x1
 144 #define SOCKET_ERR 0xFF
 145
 146 struct vfio_mp_param {
 147         int req;
 148         int result;
 149         RTE_STD_C11
 150         union {
 151                 int group_num;
 152                 int iommu_type_id;
 153         };
 154 };
 155
 156 #endif /* VFIO_PRESENT */
 157
 158 #endif /* EAL_VFIO_H_ */