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