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 53