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