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/*-
* Copyright (c) 2017-2018 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/xdma/xdma.h>
int
xchan_sglist_alloc(xdma_channel_t *xchan)
{
uint32_t sz;
if (xchan->flags & XCHAN_SGLIST_ALLOCATED)
return (-1);
sz = (sizeof(struct xdma_sglist) * XDMA_SGLIST_MAXLEN);
xchan->sg = malloc(sz, M_XDMA, M_WAITOK | M_ZERO);
xchan->flags |= XCHAN_SGLIST_ALLOCATED;
return (0);
}
void
xchan_sglist_free(xdma_channel_t *xchan)
{
if (xchan->flags & XCHAN_SGLIST_ALLOCATED)
free(xchan->sg, M_XDMA);
xchan->flags &= ~XCHAN_SGLIST_ALLOCATED;
}
int
xdma_sglist_add(struct xdma_sglist *sg, struct bus_dma_segment *seg,
uint32_t nsegs, struct xdma_request *xr)
{
int i;
if (nsegs == 0)
return (-1);
for (i = 0; i < nsegs; i++) {
sg[i].src_width = xr->src_width;
sg[i].dst_width = xr->dst_width;
if (xr->direction == XDMA_MEM_TO_DEV) {
sg[i].src_addr = seg[i].ds_addr;
sg[i].dst_addr = xr->dst_addr;
} else {
sg[i].src_addr = xr->src_addr;
sg[i].dst_addr = seg[i].ds_addr;
}
sg[i].len = seg[i].ds_len;
sg[i].direction = xr->direction;
sg[i].first = 0;
sg[i].last = 0;
}
sg[0].first = 1;
sg[nsegs - 1].last = 1;
return (0);
}
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