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#ifndef ROCKER_DESC_H
  18#define ROCKER_DESC_H
  19
  20#include "rocker_hw.h"
  21
  22typedef int (desc_ring_consume)(Rocker *r, DescInfo *info);
  23
  24uint16_t desc_buf_size(DescInfo *info);
  25uint16_t desc_tlv_size(DescInfo *info);
  26char *desc_get_buf(DescInfo *info, bool read_only);
  27int desc_set_buf(DescInfo *info, size_t tlv_size);
  28DescRing *desc_get_ring(DescInfo *info);
  29
  30int desc_ring_index(DescRing *ring);
  31bool desc_ring_set_base_addr(DescRing *ring, uint64_t base_addr);
  32uint64_t desc_ring_get_base_addr(DescRing *ring);
  33bool desc_ring_set_size(DescRing *ring, uint32_t size);
  34uint32_t desc_ring_get_size(DescRing *ring);
  35bool desc_ring_set_head(DescRing *ring, uint32_t new);
  36uint32_t desc_ring_get_head(DescRing *ring);
  37uint32_t desc_ring_get_tail(DescRing *ring);
  38void desc_ring_set_ctrl(DescRing *ring, uint32_t val);
  39bool desc_ring_ret_credits(DescRing *ring, uint32_t credits);
  40uint32_t desc_ring_get_credits(DescRing *ring);
  41
  42DescInfo *desc_ring_fetch_desc(DescRing *ring);
  43bool desc_ring_post_desc(DescRing *ring, int status);
  44
  45void desc_ring_set_consume(DescRing *ring, desc_ring_consume *consume,
  46                           unsigned vector);
  47unsigned desc_ring_get_msix_vector(DescRing *ring);
  48DescRing *desc_ring_alloc(Rocker *r, int index);
  49void desc_ring_free(DescRing *ring);
  50void desc_ring_reset(DescRing *ring);
  51
  52#endif
  53