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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>
#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>
int
xdma_dequeue(xdma_channel_t *xchan, void **user,
xdma_transfer_status_t *status)
{
struct xdma_request *xr_tmp;
struct xdma_request *xr;
QUEUE_OUT_LOCK(xchan);
TAILQ_FOREACH_SAFE(xr, &xchan->queue_out, xr_next, xr_tmp) {
TAILQ_REMOVE(&xchan->queue_out, xr, xr_next);
break;
}
QUEUE_OUT_UNLOCK(xchan);
if (xr == NULL)
return (-1);
*user = xr->user;
status->error = xr->status.error;
status->transferred = xr->status.transferred;
xchan_bank_put(xchan, xr);
return (0);
}
int
xdma_enqueue(xdma_channel_t *xchan, uintptr_t src, uintptr_t dst,
uint8_t src_width, uint8_t dst_width, bus_size_t len,
enum xdma_direction dir, void *user)
{
struct xdma_request *xr;
KASSERT(xchan->xdma != NULL, ("xdma is NULL"));
xr = xchan_bank_get(xchan);
if (xr == NULL)
return (-1); /* No space is available. */
xr->user = user;
xr->direction = dir;
xr->m = NULL;
xr->bp = NULL;
xr->block_num = 1;
xr->block_len = len;
xr->req_type = XR_TYPE_VIRT;
xr->src_addr = src;
xr->dst_addr = dst;
xr->src_width = src_width;
xr->dst_width = dst_width;
QUEUE_IN_LOCK(xchan);
TAILQ_INSERT_TAIL(&xchan->queue_in, xr, xr_next);
QUEUE_IN_UNLOCK(xchan);
return (0);
}
int
xdma_queue_submit(xdma_channel_t *xchan)
{
int ret;
KASSERT(xchan->xdma != NULL, ("xdma is NULL"));
ret = 0;
XCHAN_LOCK(xchan);
if (xchan->flags & XCHAN_TYPE_SG)
ret = xdma_queue_submit_sg(xchan);
XCHAN_UNLOCK(xchan);
return (ret);
}
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