LXR qemu/hw/rdma/vmw/pvrdma_dev

   1/*
   2 * QEMU VMWARE paravirtual RDMA ring utilities
   3 *
   4 * Copyright (C) 2018 Oracle
   5 * Copyright (C) 2018 Red Hat Inc
   6 *
   7 * Authors:
   8 *     Yuval Shaia <yuval.shaia@oracle.com>
   9 *     Marcel Apfelbaum <marcel@redhat.com>
  10 *
  11 * This work is licensed under the terms of the GNU GPL, version 2 or later.
  12 * See the COPYING file in the top-level directory.
  13 *
  14 */
  15
  16#ifndef PVRDMA_DEV_RING_H
  17#define PVRDMA_DEV_RING_H
  18
  19#include "qemu/typedefs.h"
  20
  21#define MAX_RING_NAME_SZ 32
  22
  23typedef struct PvrdmaRing {
  24    char name[MAX_RING_NAME_SZ];
  25    PCIDevice *dev;
  26    uint32_t max_elems;
  27    size_t elem_sz;
  28    struct pvrdma_ring *ring_state; /* used only for unmap */
  29    int npages;
  30    void **pages;
  31} PvrdmaRing;
  32
  33int pvrdma_ring_init(PvrdmaRing *ring, const char *name, PCIDevice *dev,
  34                     struct pvrdma_ring *ring_state, uint32_t max_elems,
  35                     size_t elem_sz, dma_addr_t *tbl, uint32_t npages);
  36void *pvrdma_ring_next_elem_read(PvrdmaRing *ring);
  37void pvrdma_ring_read_inc(PvrdmaRing *ring);
  38void *pvrdma_ring_next_elem_write(PvrdmaRing *ring);
  39void pvrdma_ring_write_inc(PvrdmaRing *ring);
  40void pvrdma_ring_free(PvrdmaRing *ring);
  41
  42#endif
  43