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/*-
* Copyright (c) 2018-2019 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/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <machine/bus.h>
#include <dev/xdma/xdma.h>
void
xchan_bank_init(xdma_channel_t *xchan)
{
struct xdma_request *xr;
xdma_controller_t *xdma;
int i;
xdma = xchan->xdma;
KASSERT(xdma != NULL, ("xdma is NULL"));
xchan->xr_mem = malloc(sizeof(struct xdma_request) * xchan->xr_num,
M_XDMA, M_WAITOK | M_ZERO);
for (i = 0; i < xchan->xr_num; i++) {
xr = &xchan->xr_mem[i];
TAILQ_INSERT_TAIL(&xchan->bank, xr, xr_next);
}
}
int
xchan_bank_free(xdma_channel_t *xchan)
{
free(xchan->xr_mem, M_XDMA);
return (0);
}
struct xdma_request *
xchan_bank_get(xdma_channel_t *xchan)
{
struct xdma_request *xr;
struct xdma_request *xr_tmp;
QUEUE_BANK_LOCK(xchan);
TAILQ_FOREACH_SAFE(xr, &xchan->bank, xr_next, xr_tmp) {
TAILQ_REMOVE(&xchan->bank, xr, xr_next);
break;
}
QUEUE_BANK_UNLOCK(xchan);
return (xr);
}
int
xchan_bank_put(xdma_channel_t *xchan, struct xdma_request *xr)
{
QUEUE_BANK_LOCK(xchan);
TAILQ_INSERT_TAIL(&xchan->bank, xr, xr_next);
QUEUE_BANK_UNLOCK(xchan);
return (0);
}
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