ceph/src/dpdk/examples/vhost_xen/xen_vhost.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef _XEN_VHOST_H_
  35 #define _XEN_VHOST_H_
  36
  37 #include <stdint.h>
  38
  39 #include <rte_ether.h>
  40
  41 #include "virtio-net.h"
  42
  43 #define RTE_LOGTYPE_XENHOST RTE_LOGTYPE_USER1
  44
  45 #define XEN_VM_ROOTNODE_FMT  "/local/domain/%d/control/dpdk"
  46 #define XEN_VM_NODE_FMT      "/local/domain/%d/control/dpdk/%s"
  47 #define XEN_MEMPOOL_SUFFIX   "mempool_gref"
  48 #define XEN_RXVRING_SUFFIX   "rx_vring_gref"
  49 #define XEN_TXVRING_SUFFIX   "tx_vring_gref"
  50 #define XEN_GVA_SUFFIX       "mempool_va"
  51 #define XEN_VRINGFLAG_SUFFIX "vring_flag"
  52 #define XEN_ADDR_SUFFIX      "ether_addr"
  53 #define VIRTIO_START         "event_type_start_"
  54
  55 #define XEN_GREF_SPLITTOKEN  ','
  56
  57 #define MAX_XENVIRT_MEMPOOL 16
  58 #define MAX_VIRTIO  32
  59 #define MAX_GREF_PER_NODE 64  /* 128 MB memory */
  60
  61 #define PAGE_SIZE   4096
  62 #define PAGE_PFNNUM (PAGE_SIZE / sizeof(uint32_t))
  63
  64 #define XEN_GNTDEV_FNAME "/dev/xen/gntdev"
  65
  66 /* xen grant reference info in one grant node */
  67 struct xen_gnt {
  68         uint32_t gref;  /* grant reference for this node */
  69         union {
  70                 int gref;               /* grant reference */
  71                 uint32_t pfn_num;       /* guest pfn number of grant reference */
  72         } gref_pfn[PAGE_PFNNUM];
  73 }__attribute__((__packed__));
  74
  75
  76 /* structure for mempool or vring node list */
  77 struct xen_gntnode {
  78         uint32_t gnt_num;           /* grant reference number */
  79         struct xen_gnt *gnt_info;   /* grant reference info */
  80 };
  81
  82
  83 struct xen_vring {
  84         uint32_t dom_id;
  85         uint32_t virtio_idx;    /* index of virtio device */
  86         void *rxvring_addr;     /* mapped virtual address of rxvring */
  87         void *txvring_addr;     /* mapped virtual address of txvring */
  88         uint32_t rxpfn_num;     /* number of gpfn for rxvring */
  89         uint32_t txpfn_num;     /* number of gpfn for txvring */
  90         uint32_t *rxpfn_tbl;    /* array of rxvring gpfn */
  91         uint32_t *txpfn_tbl;    /* array of txvring gpfn */
  92         uint64_t *rx_pindex;    /* index used to release rx grefs */
  93         uint64_t *tx_pindex;    /* index used to release tx grefs */
  94         uint64_t  flag_index;
  95         uint8_t  *flag;         /* cleared to zero on guest unmap */
  96         struct ether_addr addr; /* ethernet address of virtio device */
  97         uint8_t   removed;
  98
  99 };
 100
 101 struct xen_mempool {
 102         uint32_t dom_id;      /* guest domain id */
 103         uint32_t pool_idx;    /* index of memory pool */
 104         void *gva;            /* guest virtual address of mbuf pool */
 105         void *hva;            /* host virtual address of mbuf pool */
 106         uint32_t mempfn_num;  /* number of gpfn for mbuf pool */
 107         uint32_t *mempfn_tbl; /* array of mbuf pool gpfn */
 108         uint64_t *pindex;     /* index used to release grefs */
 109 };
 110
 111 struct xen_guest {
 112         TAILQ_ENTRY(xen_guest) next;
 113         int32_t dom_id;       /* guest domain id */
 114         uint32_t pool_num;    /* number of mbuf pool of the guest */
 115         uint32_t vring_num;   /* number of virtio ports of the guest */
 116         /* array contain the guest mbuf pool info */
 117         struct xen_mempool mempool[MAX_XENVIRT_MEMPOOL];
 118         /* array contain the guest rx/tx vring info */
 119         struct xen_vring vring[MAX_VIRTIO];
 120 };
 121
 122 TAILQ_HEAD(xen_guestlist, xen_guest);
 123
 124 int
 125 parse_mempoolnode(struct xen_guest *guest);
 126
 127 int
 128 xenhost_init(void);
 129
 130 int
 131 parse_vringnode(struct xen_guest *guest, uint32_t virtio_idx);
 132
 133 int
 134 parse_mempoolnode(struct xen_guest *guest);
 135
 136 void
 137 cleanup_mempool(struct xen_mempool *mempool);
 138
 139 void
 140 cleanup_vring(struct xen_vring *vring);
 141
 142 void
 143 virtio_monitor_loop(void);
 144
 145 int
 146 init_virtio_xen(struct virtio_net_device_ops const * const);
 147
 148 #endif