2 * Copyright (c) 2017-2018 Ruslan Bukin <br@bsdpad.com>
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include "opt_platform.h"
35 #include <sys/param.h>
38 #include <sys/kernel.h>
42 #include <machine/bus.h>
45 #include <dev/fdt/fdt_common.h>
46 #include <dev/ofw/ofw_bus.h>
47 #include <dev/ofw/ofw_bus_subr.h>
50 #include <dev/xdma/xdma.h>
53 xdma_dequeue_mbuf(xdma_channel_t *xchan, struct mbuf **mp,
54 xdma_transfer_status_t *status)
56 struct xdma_request *xr;
57 struct xdma_request *xr_tmp;
59 QUEUE_OUT_LOCK(xchan);
60 TAILQ_FOREACH_SAFE(xr, &xchan->queue_out, xr_next, xr_tmp) {
61 TAILQ_REMOVE(&xchan->queue_out, xr, xr_next);
64 QUEUE_OUT_UNLOCK(xchan);
70 status->error = xr->status.error;
71 status->transferred = xr->status.transferred;
73 xchan_bank_put(xchan, xr);
79 xdma_enqueue_mbuf(xdma_channel_t *xchan, struct mbuf **mp,
80 uintptr_t addr, uint8_t src_width, uint8_t dst_width,
81 enum xdma_direction dir)
83 struct xdma_request *xr;
84 xdma_controller_t *xdma;
88 xr = xchan_bank_get(xchan);
90 return (-1); /* No space is available yet. */
94 xr->req_type = XR_TYPE_MBUF;
95 if (dir == XDMA_MEM_TO_DEV) {
102 xr->src_width = src_width;
103 xr->dst_width = dst_width;
105 QUEUE_IN_LOCK(xchan);
106 TAILQ_INSERT_TAIL(&xchan->queue_in, xr, xr_next);
107 QUEUE_IN_UNLOCK(xchan);
113 xdma_mbuf_chain_count(struct mbuf *m0)
120 for (m = m0; m != NULL; m = m->m_next)
127 xdma_mbuf_defrag(xdma_channel_t *xchan, struct xdma_request *xr)
129 xdma_controller_t *xdma;
135 c = xdma_mbuf_chain_count(xr->m);
137 return (c); /* Nothing to do. */
139 if (xchan->caps & XCHAN_CAP_BUSDMA) {
140 if ((xchan->caps & XCHAN_CAP_BUSDMA_NOSEG) || \
141 (c > xchan->maxnsegs)) {
142 if ((m = m_defrag(xr->m, M_NOWAIT)) == NULL) {
143 device_printf(xdma->dma_dev,
144 "%s: Can't defrag mbuf\n",