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 54