ceph/src/spdk/dpdk/lib/librte_vhost/rte_vdpa.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2018 Intel Corporation
   3  */
   4
   5 #ifndef _RTE_VDPA_H_
   6 #define _RTE_VDPA_H_
   7
   8 /**
   9  * @file
  10  *
  11  * Device specific vhost lib
  12  */
  13
  14 #include <stdbool.h>
  15
  16 #include <rte_pci.h>
  17 #include "rte_vhost.h"
  18
  19 #define MAX_VDPA_NAME_LEN 128
  20
  21 enum vdpa_addr_type {
  22         PCI_ADDR,
  23         VDPA_ADDR_MAX
  24 };
  25
  26 /**
  27  * vdpa device address
  28  */
  29 struct rte_vdpa_dev_addr {
  30         /** vdpa address type */
  31         enum vdpa_addr_type type;
  32
  33         /** vdpa pci address */
  34         union {
  35                 uint8_t __dummy[64];
  36                 struct rte_pci_addr pci_addr;
  37         };
  38 };
  39
  40 /**
  41  * vdpa device operations
  42  */
  43 struct rte_vdpa_dev_ops {
  44         /** Get capabilities of this device */
  45         int (*get_queue_num)(int did, uint32_t *queue_num);
  46
  47         /** Get supported features of this device */
  48         int (*get_features)(int did, uint64_t *features);
  49
  50         /** Get supported protocol features of this device */
  51         int (*get_protocol_features)(int did, uint64_t *protocol_features);
  52
  53         /** Driver configure/close the device */
  54         int (*dev_conf)(int vid);
  55         int (*dev_close)(int vid);
  56
  57         /** Enable/disable this vring */
  58         int (*set_vring_state)(int vid, int vring, int state);
  59
  60         /** Set features when changed */
  61         int (*set_features)(int vid);
  62
  63         /** Destination operations when migration done */
  64         int (*migration_done)(int vid);
  65
  66         /** Get the vfio group fd */
  67         int (*get_vfio_group_fd)(int vid);
  68
  69         /** Get the vfio device fd */
  70         int (*get_vfio_device_fd)(int vid);
  71
  72         /** Get the notify area info of the queue */
  73         int (*get_notify_area)(int vid, int qid,
  74                         uint64_t *offset, uint64_t *size);
  75
  76         /** Reserved for future extension */
  77         void *reserved[5];
  78 };
  79
  80 /**
  81  * vdpa device structure includes device address and device operations.
  82  */
  83 struct rte_vdpa_device {
  84         /** vdpa device address */
  85         struct rte_vdpa_dev_addr addr;
  86         /** vdpa device operations */
  87         struct rte_vdpa_dev_ops *ops;
  88 } __rte_cache_aligned;
  89
  90 /**
  91  * @warning
  92  * @b EXPERIMENTAL: this API may change without prior notice
  93  *
  94  * Register a vdpa device
  95  *
  96  * @param addr
  97  *  the vdpa device address
  98  * @param ops
  99  *  the vdpa device operations
 100  * @return
 101  *  device id on success, -1 on failure
 102  */
 103 int __rte_experimental
 104 rte_vdpa_register_device(struct rte_vdpa_dev_addr *addr,
 105                 struct rte_vdpa_dev_ops *ops);
 106
 107 /**
 108  * @warning
 109  * @b EXPERIMENTAL: this API may change without prior notice
 110  *
 111  * Unregister a vdpa device
 112  *
 113  * @param did
 114  *  vdpa device id
 115  * @return
 116  *  device id on success, -1 on failure
 117  */
 118 int __rte_experimental
 119 rte_vdpa_unregister_device(int did);
 120
 121 /**
 122  * @warning
 123  * @b EXPERIMENTAL: this API may change without prior notice
 124  *
 125  * Find the device id of a vdpa device
 126  *
 127  * @param addr
 128  *  the vdpa device address
 129  * @return
 130  *  device id on success, -1 on failure
 131  */
 132 int __rte_experimental
 133 rte_vdpa_find_device_id(struct rte_vdpa_dev_addr *addr);
 134
 135 /**
 136  * @warning
 137  * @b EXPERIMENTAL: this API may change without prior notice
 138  *
 139  * Find a vdpa device based on device id
 140  *
 141  * @param did
 142  *  device id
 143  * @return
 144  *  rte_vdpa_device on success, NULL on failure
 145  */
 146 struct rte_vdpa_device * __rte_experimental
 147 rte_vdpa_get_device(int did);
 148
 149 /**
 150  * @warning
 151  * @b EXPERIMENTAL: this API may change without prior notice
 152  *
 153  * Get current available vdpa device number
 154  *
 155  * @return
 156  *  available vdpa device number
 157  */
 158 int __rte_experimental
 159 rte_vdpa_get_device_num(void);
 160
 161 /**
 162  * @warning
 163  * @b EXPERIMENTAL: this API may change without prior notice
 164  *
 165  * Enable/Disable host notifier mapping for a vdpa port.
 166  *
 167  * @param vid
 168  *  vhost device id
 169  * @param enable
 170  *  true for host notifier map, false for host notifier unmap
 171  * @return
 172  *  0 on success, -1 on failure
 173  */
 174 int __rte_experimental
 175 rte_vhost_host_notifier_ctrl(int vid, bool enable);
 176
 177 /**
 178  * @warning
 179  * @b EXPERIMENTAL: this API may change without prior notice
 180  *
 181  * Synchronize the used ring from mediated ring to guest, log dirty
 182  * page for each writeable buffer, caller should handle the used
 183  * ring logging before device stop.
 184  *
 185  * @param vid
 186  *  vhost device id
 187  * @param qid
 188  *  vhost queue id
 189  * @param vring_m
 190  *  mediated virtio ring pointer
 191  * @return
 192  *  number of synced used entries on success, -1 on failure
 193  */
 194 int __rte_experimental
 195 rte_vdpa_relay_vring_used(int vid, uint16_t qid, void *vring_m);
 196 #endif /* _RTE_VDPA_H_ */