xdma_if.m

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    1 #-
    2 # Copyright (c) 2016-2019 Ruslan Bukin <br@bsdpad.com>
    3 # All rights reserved.
    4 #
    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.
    8 #
    9 # Redistribution and use in source and binary forms, with or without
   10 # modification, are permitted provided that the following conditions
   11 # are met:
   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.
   17 #
   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
   28 # SUCH DAMAGE.
   29 #
   30 # $FreeBSD$
   31 #
   32 
   33 #include "opt_platform.h"
   34 
   35 #include <sys/malloc.h>
   36 
   37 #include <machine/bus.h>
   38 
   39 #ifdef FDT
   40 #include <dev/fdt/fdt_common.h>
   41 #include <dev/ofw/ofw_bus.h>
   42 #include <dev/ofw/ofw_bus_subr.h>
   43 #endif
   44 
   45 #include <dev/xdma/xdma.h>
   46 
   47 INTERFACE xdma;
   48 
   49 #
   50 # Request a transfer.
   51 #
   52 METHOD int channel_request {
   53         device_t                dev;
   54         struct xdma_channel     *xchan;
   55         struct xdma_request     *req;
   56 };
   57 
   58 #
   59 # Prepare xDMA channel for a scatter-gather transfer.
   60 #
   61 METHOD int channel_prep_sg {
   62         device_t                dev;
   63         struct xdma_channel     *xchan;
   64 };
   65 
   66 #
   67 # Query DMA engine driver for the amount of free entries
   68 # (descriptors) are available.
   69 #
   70 METHOD int channel_capacity {
   71         device_t                        dev;
   72         struct xdma_channel             *xchan;
   73         uint32_t                        *capacity;
   74 };
   75 
   76 #
   77 # Submit sglist list to DMA engine driver.
   78 #
   79 METHOD int channel_submit_sg {
   80         device_t                        dev;
   81         struct xdma_channel             *xchan;
   82         struct xdma_sglist              *sg;
   83         uint32_t                        sg_n;
   84 };
   85 
   86 #ifdef FDT
   87 #
   88 # Notify driver we have machine-dependend data.
   89 #
   90 METHOD int ofw_md_data {
   91         device_t dev;
   92         pcell_t *cells;
   93         int ncells;
   94         void **data;
   95 };
   96 #endif
   97 
   98 #
   99 # Allocate both virtual and harware channels.
  100 #
  101 METHOD int channel_alloc {
  102         device_t dev;
  103         struct xdma_channel *xchan;
  104 };
  105 
  106 #
  107 # Free the real hardware channel.
  108 #
  109 METHOD int channel_free {
  110         device_t dev;
  111         struct xdma_channel *xchan;
  112 };
  113 
  114 #
  115 # Begin, pause or terminate the channel operation.
  116 #
  117 METHOD int channel_control {
  118         device_t dev;
  119         struct xdma_channel *xchan;
  120         int cmd;
  121 };
  122 
  123 # IOMMU interface
  124 
  125 #
  126 # pmap is initialized
  127 #
  128 METHOD int iommu_init {
  129         device_t dev;
  130         struct xdma_iommu *xio;
  131 };
  132 
  133 #
  134 # pmap is released
  135 #
  136 METHOD int iommu_release {
  137         device_t dev;
  138         struct xdma_iommu *xio;
  139 };
  140 
  141 #
  142 # Mapping entered
  143 #
  144 METHOD int iommu_enter {
  145         device_t dev;
  146         struct xdma_iommu *xio;
  147         vm_offset_t va;
  148         vm_offset_t pa;
  149 };
  150 
  151 #
  152 # Mapping removed
  153 #
  154 METHOD int iommu_remove {
  155         device_t dev;
  156         struct xdma_iommu *xio;
  157         vm_offset_t va;
  158 };

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FreeBSD/Linux Kernel Cross Reference sys/dev/xdma/xdma_if.m

FreeBSD/Linux Kernel Cross Reference
sys/dev/xdma/xdma_if.m