LXR qemu/hw/net/rocker/rocker

   1/*
   2 * QEMU rocker switch emulation - Descriptor ring support
   3 *
   4 * Copyright (c) 2014 Scott Feldman <sfeldma@gmail.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation; either version 2 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 * GNU General Public License for more details.
  15 */
  16
  17
  18#ifndef _ROCKER_DESC_H_
  19#define _ROCKER_DESC_H_
  20
  21#include "rocker_hw.h"
  22
  23typedef int (desc_ring_consume)(Rocker *r, DescInfo *info);
  24
  25uint16_t desc_buf_size(DescInfo *info);
  26uint16_t desc_tlv_size(DescInfo *info);
  27char *desc_get_buf(DescInfo *info, bool read_only);
  28int desc_set_buf(DescInfo *info, size_t tlv_size);
  29DescRing *desc_get_ring(DescInfo *info);
  30
  31int desc_ring_index(DescRing *ring);
  32bool desc_ring_set_base_addr(DescRing *ring, uint64_t base_addr);
  33uint64_t desc_ring_get_base_addr(DescRing *ring);
  34bool desc_ring_set_size(DescRing *ring, uint32_t size);
  35uint32_t desc_ring_get_size(DescRing *ring);
  36bool desc_ring_set_head(DescRing *ring, uint32_t new);
  37uint32_t desc_ring_get_head(DescRing *ring);
  38uint32_t desc_ring_get_tail(DescRing *ring);
  39void desc_ring_set_ctrl(DescRing *ring, uint32_t val);
  40bool desc_ring_ret_credits(DescRing *ring, uint32_t credits);
  41uint32_t desc_ring_get_credits(DescRing *ring);
  42
  43DescInfo *desc_ring_fetch_desc(DescRing *ring);
  44bool desc_ring_post_desc(DescRing *ring, int status);
  45
  46void desc_ring_set_consume(DescRing *ring, desc_ring_consume *consume,
  47                           unsigned vector);
  48unsigned desc_ring_get_msix_vector(DescRing *ring);
  49DescRing *desc_ring_alloc(Rocker *r, int index);
  50void desc_ring_free(DescRing *ring);
  51void desc_ring_reset(DescRing *ring);
  52
  53#endif
  54