2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
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.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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
33 #define READ2(_sc, _reg) \
34 bus_read_2((_sc)->res[0], _reg)
35 #define READ4(_sc, _reg) \
36 bus_read_4((_sc)->res[0], _reg)
37 #define WRITE2(_sc, _reg, _val) \
38 bus_write_2((_sc)->res[0], _reg, _val)
39 #define WRITE4(_sc, _reg, _val) \
40 bus_write_4((_sc)->res[0], _reg, _val)
43 #define VRING_ALIGN 4096
45 #define VQ_ALLOC 0x01 /* set once we have a pfn */
46 #define VQ_MAX_DESCRIPTORS 512
49 uint16_t vq_qsize; /* size of this queue (a power of 2) */
52 uint16_t vq_last_avail; /* a recent value of vq_avail->va_idx */
53 uint16_t vq_save_used; /* saved vq_used->vu_idx; see vq_endchains */
54 uint32_t vq_pfn; /* PFN of virt queue (not shifted!) */
56 volatile struct vring_desc *vq_desc; /* descriptor array */
57 volatile struct vring_avail *vq_avail; /* the "avail" ring */
58 volatile struct vring_used *vq_used; /* the "used" ring */
61 int vq_ring_ready(struct vqueue_info *vq);
62 int vq_has_descs(struct vqueue_info *vq);
63 void * paddr_map(uint32_t offset, uint32_t phys, uint32_t size);
64 void paddr_unmap(void *phys, uint32_t size);
65 int vq_getchain(uint32_t beri_mem_offset, struct vqueue_info *vq,
66 struct iovec *iov, int n_iov, uint16_t *flags);
67 void vq_relchain(struct vqueue_info *vq, struct iovec *iov, int n, uint32_t iolen);
68 struct iovec * getcopy(struct iovec *iov, int n);
70 int setup_pio(device_t dev, char *name, device_t *pio_dev);
71 int setup_offset(device_t dev, uint32_t *offset);