1 | #include <machine/rtems-bsd-kernel-space.h> |
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2 | |
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3 | /*- |
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4 | * Copyright (c) 2012 Chelsio Communications, Inc. |
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5 | * All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions |
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9 | * are met: |
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10 | * 1. Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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26 | * SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include <sys/cdefs.h> |
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30 | __FBSDID("$FreeBSD$"); |
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31 | |
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32 | #include <rtems/bsd/local/opt_inet.h> |
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33 | |
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34 | #include <rtems/bsd/sys/param.h> |
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35 | #include <sys/systm.h> |
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36 | #include <rtems/bsd/sys/types.h> |
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37 | #include <sys/mbuf.h> |
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38 | #include <sys/socket.h> |
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39 | #include <sys/socketvar.h> |
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40 | #include <sys/sockopt.h> |
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41 | #include <net/if.h> |
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42 | #include <net/route.h> |
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43 | #include <netinet/in.h> |
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44 | #include <netinet/in_pcb.h> |
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45 | #include <netinet/tcp.h> |
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46 | #include <netinet/tcp_var.h> |
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47 | #include <netinet/tcp_offload.h> |
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48 | #define TCPOUTFLAGS |
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49 | #include <netinet/tcp_fsm.h> |
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50 | #include <netinet/toecore.h> |
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51 | |
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52 | int registered_toedevs; |
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53 | |
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54 | /* |
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55 | * Provide an opportunity for a TOE driver to offload. |
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56 | */ |
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57 | int |
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58 | tcp_offload_connect(struct socket *so, struct sockaddr *nam) |
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59 | { |
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60 | struct ifnet *ifp; |
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61 | struct toedev *tod; |
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62 | struct rtentry *rt; |
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63 | int error = EOPNOTSUPP; |
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64 | |
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65 | INP_WLOCK_ASSERT(sotoinpcb(so)); |
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66 | KASSERT(nam->sa_family == AF_INET || nam->sa_family == AF_INET6, |
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67 | ("%s: called with sa_family %d", __func__, nam->sa_family)); |
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68 | |
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69 | if (registered_toedevs == 0) |
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70 | return (error); |
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71 | |
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72 | rt = rtalloc1(nam, 0, 0); |
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73 | if (rt) |
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74 | RT_UNLOCK(rt); |
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75 | else |
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76 | return (EHOSTUNREACH); |
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77 | |
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78 | ifp = rt->rt_ifp; |
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79 | |
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80 | if (nam->sa_family == AF_INET && !(ifp->if_capenable & IFCAP_TOE4)) |
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81 | goto done; |
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82 | if (nam->sa_family == AF_INET6 && !(ifp->if_capenable & IFCAP_TOE6)) |
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83 | goto done; |
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84 | |
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85 | tod = TOEDEV(ifp); |
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86 | if (tod != NULL) |
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87 | error = tod->tod_connect(tod, so, rt, nam); |
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88 | done: |
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89 | RTFREE(rt); |
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90 | return (error); |
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91 | } |
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92 | |
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93 | void |
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94 | tcp_offload_listen_start(struct tcpcb *tp) |
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95 | { |
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96 | |
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97 | INP_WLOCK_ASSERT(tp->t_inpcb); |
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98 | |
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99 | EVENTHANDLER_INVOKE(tcp_offload_listen_start, tp); |
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100 | } |
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101 | |
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102 | void |
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103 | tcp_offload_listen_stop(struct tcpcb *tp) |
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104 | { |
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105 | |
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106 | INP_WLOCK_ASSERT(tp->t_inpcb); |
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107 | |
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108 | EVENTHANDLER_INVOKE(tcp_offload_listen_stop, tp); |
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109 | } |
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110 | |
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111 | void |
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112 | tcp_offload_input(struct tcpcb *tp, struct mbuf *m) |
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113 | { |
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114 | struct toedev *tod = tp->tod; |
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115 | |
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116 | KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); |
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117 | INP_WLOCK_ASSERT(tp->t_inpcb); |
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118 | |
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119 | tod->tod_input(tod, tp, m); |
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120 | } |
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121 | |
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122 | int |
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123 | tcp_offload_output(struct tcpcb *tp) |
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124 | { |
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125 | struct toedev *tod = tp->tod; |
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126 | int error, flags; |
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127 | |
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128 | KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); |
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129 | INP_WLOCK_ASSERT(tp->t_inpcb); |
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130 | |
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131 | flags = tcp_outflags[tp->t_state]; |
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132 | |
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133 | if (flags & TH_RST) { |
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134 | /* XXX: avoid repeated calls like we do for FIN */ |
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135 | error = tod->tod_send_rst(tod, tp); |
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136 | } else if ((flags & TH_FIN || tp->t_flags & TF_NEEDFIN) && |
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137 | (tp->t_flags & TF_SENTFIN) == 0) { |
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138 | error = tod->tod_send_fin(tod, tp); |
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139 | if (error == 0) |
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140 | tp->t_flags |= TF_SENTFIN; |
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141 | } else |
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142 | error = tod->tod_output(tod, tp); |
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143 | |
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144 | return (error); |
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145 | } |
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146 | |
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147 | void |
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148 | tcp_offload_rcvd(struct tcpcb *tp) |
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149 | { |
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150 | struct toedev *tod = tp->tod; |
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151 | |
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152 | KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); |
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153 | INP_WLOCK_ASSERT(tp->t_inpcb); |
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154 | |
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155 | tod->tod_rcvd(tod, tp); |
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156 | } |
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157 | |
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158 | void |
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159 | tcp_offload_ctloutput(struct tcpcb *tp, int sopt_dir, int sopt_name) |
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160 | { |
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161 | struct toedev *tod = tp->tod; |
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162 | |
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163 | KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); |
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164 | INP_WLOCK_ASSERT(tp->t_inpcb); |
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165 | |
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166 | tod->tod_ctloutput(tod, tp, sopt_dir, sopt_name); |
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167 | } |
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168 | |
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169 | void |
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170 | tcp_offload_detach(struct tcpcb *tp) |
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171 | { |
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172 | struct toedev *tod = tp->tod; |
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173 | |
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174 | KASSERT(tod != NULL, ("%s: tp->tod is NULL, tp %p", __func__, tp)); |
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175 | INP_WLOCK_ASSERT(tp->t_inpcb); |
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176 | |
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177 | tod->tod_pcb_detach(tod, tp); |
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178 | } |
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