2 # Copyright (c) 2016-2019 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
32 #include "opt_platform.h"
34 #include <sys/malloc.h>
36 #include <machine/bus.h>
39 #include <dev/fdt/fdt_common.h>
40 #include <dev/ofw/ofw_bus.h>
41 #include <dev/ofw/ofw_bus_subr.h>
44 #include <dev/xdma/xdma.h>
51 METHOD int channel_request {
53 struct xdma_channel *xchan;
54 struct xdma_request *req;
58 # Prepare xDMA channel for a scatter-gather transfer.
60 METHOD int channel_prep_sg {
62 struct xdma_channel *xchan;
66 # Query DMA engine driver for the amount of free entries
67 # (descriptors) are available.
69 METHOD int channel_capacity {
71 struct xdma_channel *xchan;
76 # Submit sglist list to DMA engine driver.
78 METHOD int channel_submit_sg {
80 struct xdma_channel *xchan;
81 struct xdma_sglist *sg;
87 # Notify driver we have machine-dependend data.
89 METHOD int ofw_md_data {
98 # Allocate both virtual and harware channels.
100 METHOD int channel_alloc {
102 struct xdma_channel *xchan;
106 # Free the real hardware channel.
108 METHOD int channel_free {
110 struct xdma_channel *xchan;
114 # Begin, pause or terminate the channel operation.
116 METHOD int channel_control {
118 struct xdma_channel *xchan;
125 # pmap is initialized
127 METHOD int iommu_init {
129 struct xdma_iommu *xio;
135 METHOD int iommu_release {
137 struct xdma_iommu *xio;
143 METHOD int iommu_enter {
145 struct xdma_iommu *xio;
153 METHOD int iommu_remove {
155 struct xdma_iommu *xio;