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/*-
* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#define READ2(_sc, _reg) \
bus_read_2((_sc)->res[0], _reg)
#define READ4(_sc, _reg) \
bus_read_4((_sc)->res[0], _reg)
#define WRITE2(_sc, _reg, _val) \
bus_write_2((_sc)->res[0], _reg, _val)
#define WRITE4(_sc, _reg, _val) \
bus_write_4((_sc)->res[0], _reg, _val)
#define PAGE_SHIFT 12
#define VRING_ALIGN 4096
#define VQ_ALLOC 0x01 /* set once we have a pfn */
#define VQ_MAX_DESCRIPTORS 512
struct vqueue_info {
uint16_t vq_qsize; /* size of this queue (a power of 2) */
uint16_t vq_num;
uint16_t vq_flags;
uint16_t vq_last_avail; /* a recent value of vq_avail->va_idx */
uint16_t vq_save_used; /* saved vq_used->vu_idx; see vq_endchains */
uint32_t vq_pfn; /* PFN of virt queue (not shifted!) */
volatile struct vring_desc *vq_desc; /* descriptor array */
volatile struct vring_avail *vq_avail; /* the "avail" ring */
volatile struct vring_used *vq_used; /* the "used" ring */
};
int vq_ring_ready(struct vqueue_info *vq);
int vq_has_descs(struct vqueue_info *vq);
void * paddr_map(uint32_t offset, uint32_t phys, uint32_t size);
void paddr_unmap(void *phys, uint32_t size);
int vq_getchain(uint32_t beri_mem_offset, struct vqueue_info *vq,
struct iovec *iov, int n_iov, uint16_t *flags);
void vq_relchain(struct vqueue_info *vq, struct iovec *iov, int n, uint32_t iolen);
int setup_pio(device_t dev, char *name, device_t *pio_dev);
int setup_offset(device_t dev, uint32_t *offset);
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