hw/net/rocker/rocker_desc.h

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