1 /*- 2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * This software was developed by SRI International and the University of 6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7 * ("CTSRD"), as part of the DARPA CRASH research programme. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #define READ2(_sc, _reg) \ 32 bus_read_2((_sc)->res[0], _reg) 33 #define READ4(_sc, _reg) \ 34 bus_read_4((_sc)->res[0], _reg) 35 #define WRITE2(_sc, _reg, _val) \ 36 bus_write_2((_sc)->res[0], _reg, _val) 37 #define WRITE4(_sc, _reg, _val) \ 38 bus_write_4((_sc)->res[0], _reg, _val) 39 40 #define PAGE_SHIFT 12 41 #define VRING_ALIGN 4096 42 43 #define VQ_ALLOC 0x01 /* set once we have a pfn */ 44 #define VQ_MAX_DESCRIPTORS 512 45 46 struct vqueue_info { 47 uint16_t vq_qsize; /* size of this queue (a power of 2) */ 48 uint16_t vq_num; 49 uint16_t vq_flags; 50 uint16_t vq_last_avail; /* a recent value of vq_avail->va_idx */ 51 uint16_t vq_save_used; /* saved vq_used->vu_idx; see vq_endchains */ 52 uint32_t vq_pfn; /* PFN of virt queue (not shifted!) */ 53 54 volatile struct vring_desc *vq_desc; /* descriptor array */ 55 volatile struct vring_avail *vq_avail; /* the "avail" ring */ 56 volatile struct vring_used *vq_used; /* the "used" ring */ 57 }; 58 59 int vq_ring_ready(struct vqueue_info *vq); 60 int vq_has_descs(struct vqueue_info *vq); 61 void * paddr_map(uint32_t offset, uint32_t phys, uint32_t size); 62 void paddr_unmap(void *phys, uint32_t size); 63 int vq_getchain(uint32_t beri_mem_offset, struct vqueue_info *vq, 64 struct iovec *iov, int n_iov, uint16_t *flags); 65 void vq_relchain(struct vqueue_info *vq, struct iovec *iov, int n, uint32_t iolen); 66 struct iovec * getcopy(struct iovec *iov, int n); 67 68 int setup_pio(device_t dev, char *name, device_t *pio_dev); 69 int setup_offset(device_t dev, uint32_t *offset); 70