Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2006 - 2008 NetEffect, Inc. All rights reserved. |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | |
| 35 | #define TCPOPT_TIMESTAMP 8 |
| 36 | |
| 37 | #include <asm/atomic.h> |
| 38 | #include <linux/skbuff.h> |
| 39 | #include <linux/ip.h> |
| 40 | #include <linux/tcp.h> |
| 41 | #include <linux/init.h> |
| 42 | #include <linux/if_arp.h> |
Chien Tung | f2b2b59 | 2008-03-20 19:55:30 -0500 | [diff] [blame] | 43 | #include <linux/if_vlan.h> |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 44 | #include <linux/notifier.h> |
| 45 | #include <linux/net.h> |
| 46 | #include <linux/types.h> |
| 47 | #include <linux/timer.h> |
| 48 | #include <linux/time.h> |
| 49 | #include <linux/delay.h> |
| 50 | #include <linux/etherdevice.h> |
| 51 | #include <linux/netdevice.h> |
| 52 | #include <linux/random.h> |
| 53 | #include <linux/list.h> |
| 54 | #include <linux/threads.h> |
Bob Sharp | 7191a0a | 2008-10-03 12:21:19 -0700 | [diff] [blame] | 55 | #include <net/arp.h> |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 56 | #include <net/neighbour.h> |
| 57 | #include <net/route.h> |
| 58 | #include <net/ip_fib.h> |
| 59 | |
| 60 | #include "nes.h" |
| 61 | |
| 62 | u32 cm_packets_sent; |
| 63 | u32 cm_packets_bounced; |
| 64 | u32 cm_packets_dropped; |
| 65 | u32 cm_packets_retrans; |
| 66 | u32 cm_packets_created; |
| 67 | u32 cm_packets_received; |
| 68 | u32 cm_listens_created; |
| 69 | u32 cm_listens_destroyed; |
| 70 | u32 cm_backlog_drops; |
| 71 | atomic_t cm_loopbacks; |
| 72 | atomic_t cm_nodes_created; |
| 73 | atomic_t cm_nodes_destroyed; |
| 74 | atomic_t cm_accel_dropped_pkts; |
| 75 | atomic_t cm_resets_recvd; |
| 76 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 77 | static inline int mini_cm_accelerated(struct nes_cm_core *, |
| 78 | struct nes_cm_node *); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 79 | static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 80 | struct nes_vnic *, struct nes_cm_info *); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 81 | static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *); |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 82 | static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 83 | struct nes_vnic *, u16, void *, struct nes_cm_info *); |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 84 | static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 85 | static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *, |
| 86 | struct nes_cm_node *); |
| 87 | static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *, |
| 88 | struct nes_cm_node *); |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 89 | static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 90 | struct sk_buff *); |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 91 | static int mini_cm_dealloc_core(struct nes_cm_core *); |
| 92 | static int mini_cm_get(struct nes_cm_core *); |
| 93 | static int mini_cm_set(struct nes_cm_core *, u32, u32); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 94 | |
| 95 | static struct sk_buff *form_cm_frame(struct sk_buff *, struct nes_cm_node *, |
| 96 | void *, u32, void *, u32, u8); |
| 97 | static struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node); |
| 98 | static int add_ref_cm_node(struct nes_cm_node *); |
| 99 | static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *); |
| 100 | |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 101 | static int nes_cm_disconn_true(struct nes_qp *); |
| 102 | static int nes_cm_post_event(struct nes_cm_event *event); |
| 103 | static int nes_disconnect(struct nes_qp *nesqp, int abrupt); |
| 104 | static void nes_disconnect_worker(struct work_struct *work); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 105 | |
| 106 | static int send_mpa_request(struct nes_cm_node *, struct sk_buff *); |
| 107 | static int send_syn(struct nes_cm_node *, u32, struct sk_buff *); |
| 108 | static int send_reset(struct nes_cm_node *, struct sk_buff *); |
| 109 | static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb); |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 110 | static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 111 | static void process_packet(struct nes_cm_node *, struct sk_buff *, |
| 112 | struct nes_cm_core *); |
| 113 | |
| 114 | static void active_open_err(struct nes_cm_node *, struct sk_buff *, int); |
| 115 | static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int); |
| 116 | static void cleanup_retrans_entry(struct nes_cm_node *); |
| 117 | static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *, |
| 118 | enum nes_cm_event_type); |
| 119 | static void free_retrans_entry(struct nes_cm_node *cm_node); |
| 120 | static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, |
| 121 | struct sk_buff *skb, int optionsize, int passive); |
| 122 | |
| 123 | /* CM event handler functions */ |
| 124 | static void cm_event_connected(struct nes_cm_event *); |
| 125 | static void cm_event_connect_error(struct nes_cm_event *); |
| 126 | static void cm_event_reset(struct nes_cm_event *); |
| 127 | static void cm_event_mpa_req(struct nes_cm_event *); |
| 128 | |
| 129 | static void print_core(struct nes_cm_core *core); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 130 | |
| 131 | /* External CM API Interface */ |
| 132 | /* instance of function pointers for client API */ |
| 133 | /* set address of this instance to cm_core->cm_ops at cm_core alloc */ |
| 134 | static struct nes_cm_ops nes_cm_api = { |
| 135 | mini_cm_accelerated, |
| 136 | mini_cm_listen, |
| 137 | mini_cm_del_listen, |
| 138 | mini_cm_connect, |
| 139 | mini_cm_close, |
| 140 | mini_cm_accept, |
| 141 | mini_cm_reject, |
| 142 | mini_cm_recv_pkt, |
| 143 | mini_cm_dealloc_core, |
| 144 | mini_cm_get, |
| 145 | mini_cm_set |
| 146 | }; |
| 147 | |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 148 | static struct nes_cm_core *g_cm_core; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 149 | |
| 150 | atomic_t cm_connects; |
| 151 | atomic_t cm_accepts; |
| 152 | atomic_t cm_disconnects; |
| 153 | atomic_t cm_closes; |
| 154 | atomic_t cm_connecteds; |
| 155 | atomic_t cm_connect_reqs; |
| 156 | atomic_t cm_rejects; |
| 157 | |
| 158 | |
| 159 | /** |
| 160 | * create_event |
| 161 | */ |
| 162 | static struct nes_cm_event *create_event(struct nes_cm_node *cm_node, |
| 163 | enum nes_cm_event_type type) |
| 164 | { |
| 165 | struct nes_cm_event *event; |
| 166 | |
| 167 | if (!cm_node->cm_id) |
| 168 | return NULL; |
| 169 | |
| 170 | /* allocate an empty event */ |
| 171 | event = kzalloc(sizeof(*event), GFP_ATOMIC); |
| 172 | |
| 173 | if (!event) |
| 174 | return NULL; |
| 175 | |
| 176 | event->type = type; |
| 177 | event->cm_node = cm_node; |
| 178 | event->cm_info.rem_addr = cm_node->rem_addr; |
| 179 | event->cm_info.loc_addr = cm_node->loc_addr; |
| 180 | event->cm_info.rem_port = cm_node->rem_port; |
| 181 | event->cm_info.loc_port = cm_node->loc_port; |
| 182 | event->cm_info.cm_id = cm_node->cm_id; |
| 183 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 184 | nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, " |
| 185 | "dst_addr=%08x[%x], src_addr=%08x[%x]\n", |
| 186 | cm_node, event, type, event->cm_info.loc_addr, |
| 187 | event->cm_info.loc_port, event->cm_info.rem_addr, |
| 188 | event->cm_info.rem_port); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 189 | |
| 190 | nes_cm_post_event(event); |
| 191 | return event; |
| 192 | } |
| 193 | |
| 194 | |
| 195 | /** |
| 196 | * send_mpa_request |
| 197 | */ |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 198 | static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 199 | { |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 200 | int ret; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 201 | if (!skb) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 202 | nes_debug(NES_DBG_CM, "skb set to NULL\n"); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 203 | return -1; |
| 204 | } |
| 205 | |
| 206 | /* send an MPA Request frame */ |
| 207 | form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame, |
| 208 | cm_node->mpa_frame_size, SET_ACK); |
| 209 | |
| 210 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 211 | if (ret < 0) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 212 | return ret; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 213 | |
| 214 | return 0; |
| 215 | } |
| 216 | |
| 217 | |
| 218 | /** |
| 219 | * recv_mpa - process a received TCP pkt, we are expecting an |
| 220 | * IETF MPA frame |
| 221 | */ |
| 222 | static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 len) |
| 223 | { |
| 224 | struct ietf_mpa_frame *mpa_frame; |
| 225 | |
| 226 | /* assume req frame is in tcp data payload */ |
| 227 | if (len < sizeof(struct ietf_mpa_frame)) { |
| 228 | nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len); |
| 229 | return -1; |
| 230 | } |
| 231 | |
| 232 | mpa_frame = (struct ietf_mpa_frame *)buffer; |
| 233 | cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len); |
| 234 | |
| 235 | if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) { |
| 236 | nes_debug(NES_DBG_CM, "The received ietf buffer was not right" |
| 237 | " complete (%x + %x != %x)\n", |
| 238 | cm_node->mpa_frame_size, (u32)sizeof(struct ietf_mpa_frame), len); |
| 239 | return -1; |
| 240 | } |
| 241 | |
| 242 | /* copy entire MPA frame to our cm_node's frame */ |
| 243 | memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame), |
| 244 | cm_node->mpa_frame_size); |
| 245 | |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | |
| 250 | /** |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 251 | * form_cm_frame - get a free packet and build empty frame Use |
| 252 | * node info to build. |
| 253 | */ |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 254 | static struct sk_buff *form_cm_frame(struct sk_buff *skb, |
| 255 | struct nes_cm_node *cm_node, void *options, u32 optionsize, |
| 256 | void *data, u32 datasize, u8 flags) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 257 | { |
| 258 | struct tcphdr *tcph; |
| 259 | struct iphdr *iph; |
| 260 | struct ethhdr *ethh; |
| 261 | u8 *buf; |
| 262 | u16 packetsize = sizeof(*iph); |
| 263 | |
| 264 | packetsize += sizeof(*tcph); |
| 265 | packetsize += optionsize + datasize; |
| 266 | |
| 267 | memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph)); |
| 268 | |
| 269 | skb->len = 0; |
| 270 | buf = skb_put(skb, packetsize + ETH_HLEN); |
| 271 | |
| 272 | ethh = (struct ethhdr *) buf; |
| 273 | buf += ETH_HLEN; |
| 274 | |
| 275 | iph = (struct iphdr *)buf; |
| 276 | buf += sizeof(*iph); |
| 277 | tcph = (struct tcphdr *)buf; |
| 278 | skb_reset_mac_header(skb); |
| 279 | skb_set_network_header(skb, ETH_HLEN); |
| 280 | skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph)); |
| 281 | buf += sizeof(*tcph); |
| 282 | |
| 283 | skb->ip_summed = CHECKSUM_PARTIAL; |
| 284 | skb->protocol = htons(0x800); |
| 285 | skb->data_len = 0; |
| 286 | skb->mac_len = ETH_HLEN; |
| 287 | |
| 288 | memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN); |
| 289 | memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN); |
| 290 | ethh->h_proto = htons(0x0800); |
| 291 | |
| 292 | iph->version = IPVERSION; |
| 293 | iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ |
| 294 | iph->tos = 0; |
| 295 | iph->tot_len = htons(packetsize); |
| 296 | iph->id = htons(++cm_node->tcp_cntxt.loc_id); |
| 297 | |
| 298 | iph->frag_off = htons(0x4000); |
| 299 | iph->ttl = 0x40; |
| 300 | iph->protocol = 0x06; /* IPPROTO_TCP */ |
| 301 | |
| 302 | iph->saddr = htonl(cm_node->loc_addr); |
| 303 | iph->daddr = htonl(cm_node->rem_addr); |
| 304 | |
| 305 | tcph->source = htons(cm_node->loc_port); |
| 306 | tcph->dest = htons(cm_node->rem_port); |
| 307 | tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); |
| 308 | |
| 309 | if (flags & SET_ACK) { |
| 310 | cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; |
| 311 | tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); |
| 312 | tcph->ack = 1; |
| 313 | } else |
| 314 | tcph->ack_seq = 0; |
| 315 | |
| 316 | if (flags & SET_SYN) { |
| 317 | cm_node->tcp_cntxt.loc_seq_num++; |
| 318 | tcph->syn = 1; |
| 319 | } else |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 320 | cm_node->tcp_cntxt.loc_seq_num += datasize; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 321 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 322 | if (flags & SET_FIN) { |
| 323 | cm_node->tcp_cntxt.loc_seq_num++; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 324 | tcph->fin = 1; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 325 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 326 | |
| 327 | if (flags & SET_RST) |
| 328 | tcph->rst = 1; |
| 329 | |
| 330 | tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2); |
| 331 | tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); |
| 332 | tcph->urg_ptr = 0; |
| 333 | if (optionsize) |
| 334 | memcpy(buf, options, optionsize); |
| 335 | buf += optionsize; |
| 336 | if (datasize) |
| 337 | memcpy(buf, data, datasize); |
| 338 | |
| 339 | skb_shinfo(skb)->nr_frags = 0; |
| 340 | cm_packets_created++; |
| 341 | |
| 342 | return skb; |
| 343 | } |
| 344 | |
| 345 | |
| 346 | /** |
| 347 | * print_core - dump a cm core |
| 348 | */ |
| 349 | static void print_core(struct nes_cm_core *core) |
| 350 | { |
| 351 | nes_debug(NES_DBG_CM, "---------------------------------------------\n"); |
| 352 | nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core); |
| 353 | if (!core) |
| 354 | return; |
| 355 | nes_debug(NES_DBG_CM, "---------------------------------------------\n"); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 356 | |
| 357 | nes_debug(NES_DBG_CM, "State : %u \n", core->state); |
| 358 | |
| 359 | nes_debug(NES_DBG_CM, "Tx Free cnt : %u \n", skb_queue_len(&core->tx_free_list)); |
| 360 | nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt)); |
| 361 | nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt)); |
| 362 | |
| 363 | nes_debug(NES_DBG_CM, "core : %p \n", core); |
| 364 | |
| 365 | nes_debug(NES_DBG_CM, "-------------- end core ---------------\n"); |
| 366 | } |
| 367 | |
| 368 | |
| 369 | /** |
| 370 | * schedule_nes_timer |
| 371 | * note - cm_node needs to be protected before calling this. Encase in: |
| 372 | * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node); |
| 373 | */ |
| 374 | int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb, |
| 375 | enum nes_timer_type type, int send_retrans, |
| 376 | int close_when_complete) |
| 377 | { |
| 378 | unsigned long flags; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 379 | struct nes_cm_core *cm_core = cm_node->cm_core; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 380 | struct nes_timer_entry *new_send; |
| 381 | int ret = 0; |
| 382 | u32 was_timer_set; |
| 383 | |
Adrian Bunk | ed0ba33 | 2008-02-21 08:12:06 -0600 | [diff] [blame] | 384 | if (!cm_node) |
| 385 | return -EINVAL; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 386 | new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); |
| 387 | if (!new_send) |
| 388 | return -1; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 389 | |
| 390 | /* new_send->timetosend = currenttime */ |
| 391 | new_send->retrycount = NES_DEFAULT_RETRYS; |
| 392 | new_send->retranscount = NES_DEFAULT_RETRANS; |
| 393 | new_send->skb = skb; |
| 394 | new_send->timetosend = jiffies; |
| 395 | new_send->type = type; |
| 396 | new_send->netdev = cm_node->netdev; |
| 397 | new_send->send_retrans = send_retrans; |
| 398 | new_send->close_when_complete = close_when_complete; |
| 399 | |
| 400 | if (type == NES_TIMER_TYPE_CLOSE) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 401 | new_send->timetosend += (HZ/10); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 402 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); |
| 403 | list_add_tail(&new_send->list, &cm_node->recv_list); |
| 404 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); |
| 405 | } |
| 406 | |
| 407 | if (type == NES_TIMER_TYPE_SEND) { |
Roland Dreier | b30db1c | 2008-04-16 21:01:07 -0700 | [diff] [blame] | 408 | new_send->seq_num = ntohl(tcp_hdr(skb)->seq); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 409 | atomic_inc(&new_send->skb->users); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 410 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
| 411 | cm_node->send_entry = new_send; |
| 412 | add_ref_cm_node(cm_node); |
| 413 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
| 414 | new_send->timetosend = jiffies + NES_RETRY_TIMEOUT; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 415 | |
| 416 | ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev); |
| 417 | if (ret != NETDEV_TX_OK) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 418 | nes_debug(NES_DBG_CM, "Error sending packet %p " |
| 419 | "(jiffies = %lu)\n", new_send, jiffies); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 420 | atomic_dec(&new_send->skb->users); |
| 421 | new_send->timetosend = jiffies; |
| 422 | } else { |
| 423 | cm_packets_sent++; |
| 424 | if (!send_retrans) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 425 | cleanup_retrans_entry(cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 426 | if (close_when_complete) |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 427 | rem_ref_cm_node(cm_core, cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 428 | return ret; |
| 429 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 430 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 431 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 432 | |
| 433 | was_timer_set = timer_pending(&cm_core->tcp_timer); |
| 434 | |
| 435 | if (!was_timer_set) { |
| 436 | cm_core->tcp_timer.expires = new_send->timetosend; |
| 437 | add_timer(&cm_core->tcp_timer); |
| 438 | } |
| 439 | |
| 440 | return ret; |
| 441 | } |
| 442 | |
| 443 | |
| 444 | /** |
| 445 | * nes_cm_timer_tick |
| 446 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 447 | static void nes_cm_timer_tick(unsigned long pass) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 448 | { |
| 449 | unsigned long flags, qplockflags; |
| 450 | unsigned long nexttimeout = jiffies + NES_LONG_TIME; |
| 451 | struct iw_cm_id *cm_id; |
| 452 | struct nes_cm_node *cm_node; |
| 453 | struct nes_timer_entry *send_entry, *recv_entry; |
| 454 | struct list_head *list_core, *list_core_temp; |
| 455 | struct list_head *list_node, *list_node_temp; |
| 456 | struct nes_cm_core *cm_core = g_cm_core; |
| 457 | struct nes_qp *nesqp; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 458 | u32 settimer = 0; |
| 459 | int ret = NETDEV_TX_OK; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 460 | enum nes_cm_node_state last_state; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 461 | |
Faisal Latif | 879e5bd | 2008-11-21 20:50:41 -0600 | [diff] [blame] | 462 | struct list_head timer_list; |
| 463 | INIT_LIST_HEAD(&timer_list); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 464 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
| 465 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 466 | list_for_each_safe(list_node, list_core_temp, |
Faisal Latif | 879e5bd | 2008-11-21 20:50:41 -0600 | [diff] [blame] | 467 | &cm_core->connected_nodes) { |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 468 | cm_node = container_of(list_node, struct nes_cm_node, list); |
Faisal Latif | 879e5bd | 2008-11-21 20:50:41 -0600 | [diff] [blame] | 469 | if (!list_empty(&cm_node->recv_list) || (cm_node->send_entry)) { |
| 470 | add_ref_cm_node(cm_node); |
| 471 | list_add(&cm_node->timer_entry, &timer_list); |
| 472 | } |
| 473 | } |
| 474 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 475 | |
| 476 | list_for_each_safe(list_node, list_core_temp, &timer_list) { |
| 477 | cm_node = container_of(list_node, struct nes_cm_node, |
| 478 | timer_entry); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 479 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 480 | list_for_each_safe(list_core, list_node_temp, |
| 481 | &cm_node->recv_list) { |
| 482 | recv_entry = container_of(list_core, |
| 483 | struct nes_timer_entry, list); |
| 484 | if (!recv_entry) |
| 485 | break; |
| 486 | if (time_after(recv_entry->timetosend, jiffies)) { |
| 487 | if (nexttimeout > recv_entry->timetosend || |
| 488 | !settimer) { |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 489 | nexttimeout = recv_entry->timetosend; |
| 490 | settimer = 1; |
| 491 | } |
| 492 | continue; |
| 493 | } |
| 494 | list_del(&recv_entry->list); |
| 495 | cm_id = cm_node->cm_id; |
| 496 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 497 | nesqp = (struct nes_qp *)recv_entry->skb; |
| 498 | spin_lock_irqsave(&nesqp->lock, qplockflags); |
| 499 | if (nesqp->cm_id) { |
| 500 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, " |
| 501 | "refcount = %d: HIT A " |
| 502 | "NES_TIMER_TYPE_CLOSE with something " |
| 503 | "to do!!!\n", nesqp->hwqp.qp_id, cm_id, |
| 504 | atomic_read(&nesqp->refcount)); |
| 505 | nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED; |
| 506 | nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT; |
| 507 | nesqp->ibqp_state = IB_QPS_ERR; |
| 508 | spin_unlock_irqrestore(&nesqp->lock, |
| 509 | qplockflags); |
| 510 | nes_cm_disconn(nesqp); |
| 511 | } else { |
| 512 | spin_unlock_irqrestore(&nesqp->lock, |
| 513 | qplockflags); |
| 514 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, " |
| 515 | "refcount = %d: HIT A " |
| 516 | "NES_TIMER_TYPE_CLOSE with nothing " |
| 517 | "to do!!!\n", nesqp->hwqp.qp_id, cm_id, |
| 518 | atomic_read(&nesqp->refcount)); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 519 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 520 | if (cm_id) |
| 521 | cm_id->rem_ref(cm_id); |
| 522 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 523 | kfree(recv_entry); |
| 524 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); |
| 525 | } |
| 526 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); |
| 527 | |
| 528 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 529 | do { |
| 530 | send_entry = cm_node->send_entry; |
| 531 | if (!send_entry) |
Faisal Latif | c5d321e | 2008-11-21 20:50:38 -0600 | [diff] [blame] | 532 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 533 | if (time_after(send_entry->timetosend, jiffies)) { |
| 534 | if (cm_node->state != NES_CM_STATE_TSA) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 535 | if ((nexttimeout > |
| 536 | send_entry->timetosend) || |
| 537 | !settimer) { |
| 538 | nexttimeout = |
| 539 | send_entry->timetosend; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 540 | settimer = 1; |
Faisal Latif | c5d321e | 2008-11-21 20:50:38 -0600 | [diff] [blame] | 541 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 542 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 543 | } else { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 544 | free_retrans_entry(cm_node); |
Faisal Latif | c5d321e | 2008-11-21 20:50:38 -0600 | [diff] [blame] | 545 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 546 | } |
| 547 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 548 | |
| 549 | if ((cm_node->state == NES_CM_STATE_TSA) || |
| 550 | (cm_node->state == NES_CM_STATE_CLOSED)) { |
| 551 | free_retrans_entry(cm_node); |
Faisal Latif | c5d321e | 2008-11-21 20:50:38 -0600 | [diff] [blame] | 552 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 553 | } |
| 554 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 555 | if (!send_entry->retranscount || |
| 556 | !send_entry->retrycount) { |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 557 | cm_packets_dropped++; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 558 | last_state = cm_node->state; |
| 559 | cm_node->state = NES_CM_STATE_CLOSED; |
| 560 | free_retrans_entry(cm_node); |
| 561 | spin_unlock_irqrestore( |
| 562 | &cm_node->retrans_list_lock, flags); |
| 563 | if (last_state == NES_CM_STATE_SYN_RCVD) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 564 | rem_ref_cm_node(cm_core, cm_node); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 565 | else |
| 566 | create_event(cm_node, |
| 567 | NES_CM_EVENT_ABORTED); |
| 568 | spin_lock_irqsave(&cm_node->retrans_list_lock, |
| 569 | flags); |
Faisal Latif | c5d321e | 2008-11-21 20:50:38 -0600 | [diff] [blame] | 570 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 571 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 572 | atomic_inc(&send_entry->skb->users); |
| 573 | cm_packets_retrans++; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 574 | nes_debug(NES_DBG_CM, "Retransmitting send_entry %p " |
| 575 | "for node %p, jiffies = %lu, time to send = " |
| 576 | "%lu, retranscount = %u, send_entry->seq_num = " |
| 577 | "0x%08X, cm_node->tcp_cntxt.rem_ack_num = " |
| 578 | "0x%08X\n", send_entry, cm_node, jiffies, |
| 579 | send_entry->timetosend, |
| 580 | send_entry->retranscount, |
| 581 | send_entry->seq_num, |
| 582 | cm_node->tcp_cntxt.rem_ack_num); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 583 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 584 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, |
| 585 | flags); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 586 | ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 587 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 588 | if (ret != NETDEV_TX_OK) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 589 | nes_debug(NES_DBG_CM, "rexmit failed for " |
| 590 | "node=%p\n", cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 591 | cm_packets_bounced++; |
| 592 | atomic_dec(&send_entry->skb->users); |
| 593 | send_entry->retrycount--; |
| 594 | nexttimeout = jiffies + NES_SHORT_TIME; |
| 595 | settimer = 1; |
Faisal Latif | c5d321e | 2008-11-21 20:50:38 -0600 | [diff] [blame] | 596 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 597 | } else { |
| 598 | cm_packets_sent++; |
| 599 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 600 | nes_debug(NES_DBG_CM, "Packet Sent: retrans count = " |
| 601 | "%u, retry count = %u.\n", |
| 602 | send_entry->retranscount, |
| 603 | send_entry->retrycount); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 604 | if (send_entry->send_retrans) { |
| 605 | send_entry->retranscount--; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 606 | send_entry->timetosend = jiffies + |
| 607 | NES_RETRY_TIMEOUT; |
| 608 | if (nexttimeout > send_entry->timetosend || |
| 609 | !settimer) { |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 610 | nexttimeout = send_entry->timetosend; |
| 611 | settimer = 1; |
| 612 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 613 | } else { |
| 614 | int close_when_complete; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 615 | close_when_complete = |
| 616 | send_entry->close_when_complete; |
| 617 | nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n", |
| 618 | cm_node, cm_node->state); |
| 619 | free_retrans_entry(cm_node); |
| 620 | if (close_when_complete) |
| 621 | rem_ref_cm_node(cm_node->cm_core, |
| 622 | cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 623 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 624 | } while (0); |
| 625 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 626 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 627 | rem_ref_cm_node(cm_node->cm_core, cm_node); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 628 | if (ret != NETDEV_TX_OK) { |
| 629 | nes_debug(NES_DBG_CM, "rexmit failed for cm_node=%p\n", |
| 630 | cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 631 | break; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 632 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 633 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 634 | |
| 635 | if (settimer) { |
| 636 | if (!timer_pending(&cm_core->tcp_timer)) { |
| 637 | cm_core->tcp_timer.expires = nexttimeout; |
| 638 | add_timer(&cm_core->tcp_timer); |
| 639 | } |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | |
| 644 | /** |
| 645 | * send_syn |
| 646 | */ |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 647 | static int send_syn(struct nes_cm_node *cm_node, u32 sendack, |
| 648 | struct sk_buff *skb) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 649 | { |
| 650 | int ret; |
| 651 | int flags = SET_SYN; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 652 | char optionsbuffer[sizeof(struct option_mss) + |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 653 | sizeof(struct option_windowscale) + sizeof(struct option_base) + |
| 654 | TCP_OPTIONS_PADDING]; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 655 | |
| 656 | int optionssize = 0; |
| 657 | /* Sending MSS option */ |
| 658 | union all_known_options *options; |
| 659 | |
| 660 | if (!cm_node) |
| 661 | return -EINVAL; |
| 662 | |
| 663 | options = (union all_known_options *)&optionsbuffer[optionssize]; |
| 664 | options->as_mss.optionnum = OPTION_NUMBER_MSS; |
| 665 | options->as_mss.length = sizeof(struct option_mss); |
| 666 | options->as_mss.mss = htons(cm_node->tcp_cntxt.mss); |
| 667 | optionssize += sizeof(struct option_mss); |
| 668 | |
| 669 | options = (union all_known_options *)&optionsbuffer[optionssize]; |
| 670 | options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE; |
| 671 | options->as_windowscale.length = sizeof(struct option_windowscale); |
| 672 | options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale; |
| 673 | optionssize += sizeof(struct option_windowscale); |
| 674 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 675 | if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) { |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 676 | options = (union all_known_options *)&optionsbuffer[optionssize]; |
| 677 | options->as_base.optionnum = OPTION_NUMBER_WRITE0; |
| 678 | options->as_base.length = sizeof(struct option_base); |
| 679 | optionssize += sizeof(struct option_base); |
| 680 | /* we need the size to be a multiple of 4 */ |
| 681 | options = (union all_known_options *)&optionsbuffer[optionssize]; |
| 682 | options->as_end = 1; |
| 683 | optionssize += 1; |
| 684 | options = (union all_known_options *)&optionsbuffer[optionssize]; |
| 685 | options->as_end = 1; |
| 686 | optionssize += 1; |
| 687 | } |
| 688 | |
| 689 | options = (union all_known_options *)&optionsbuffer[optionssize]; |
| 690 | options->as_end = OPTION_NUMBER_END; |
| 691 | optionssize += 1; |
| 692 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 693 | if (!skb) |
| 694 | skb = get_free_pkt(cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 695 | if (!skb) { |
| 696 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); |
| 697 | return -1; |
| 698 | } |
| 699 | |
| 700 | if (sendack) |
| 701 | flags |= SET_ACK; |
| 702 | |
| 703 | form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags); |
| 704 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); |
| 705 | |
| 706 | return ret; |
| 707 | } |
| 708 | |
| 709 | |
| 710 | /** |
| 711 | * send_reset |
| 712 | */ |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 713 | static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 714 | { |
| 715 | int ret; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 716 | int flags = SET_RST | SET_ACK; |
| 717 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 718 | if (!skb) |
| 719 | skb = get_free_pkt(cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 720 | if (!skb) { |
| 721 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); |
| 722 | return -1; |
| 723 | } |
| 724 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 725 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags); |
| 726 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1); |
| 727 | |
| 728 | return ret; |
| 729 | } |
| 730 | |
| 731 | |
| 732 | /** |
| 733 | * send_ack |
| 734 | */ |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 735 | static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 736 | { |
| 737 | int ret; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 738 | |
| 739 | if (!skb) |
| 740 | skb = get_free_pkt(cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 741 | |
| 742 | if (!skb) { |
| 743 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); |
| 744 | return -1; |
| 745 | } |
| 746 | |
| 747 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK); |
| 748 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0); |
| 749 | |
| 750 | return ret; |
| 751 | } |
| 752 | |
| 753 | |
| 754 | /** |
| 755 | * send_fin |
| 756 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 757 | static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 758 | { |
| 759 | int ret; |
| 760 | |
| 761 | /* if we didn't get a frame get one */ |
| 762 | if (!skb) |
| 763 | skb = get_free_pkt(cm_node); |
| 764 | |
| 765 | if (!skb) { |
| 766 | nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); |
| 767 | return -1; |
| 768 | } |
| 769 | |
| 770 | form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN); |
| 771 | ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); |
| 772 | |
| 773 | return ret; |
| 774 | } |
| 775 | |
| 776 | |
| 777 | /** |
| 778 | * get_free_pkt |
| 779 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 780 | static struct sk_buff *get_free_pkt(struct nes_cm_node *cm_node) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 781 | { |
| 782 | struct sk_buff *skb, *new_skb; |
| 783 | |
| 784 | /* check to see if we need to repopulate the free tx pkt queue */ |
| 785 | if (skb_queue_len(&cm_node->cm_core->tx_free_list) < NES_CM_FREE_PKT_LO_WATERMARK) { |
| 786 | while (skb_queue_len(&cm_node->cm_core->tx_free_list) < |
| 787 | cm_node->cm_core->free_tx_pkt_max) { |
| 788 | /* replace the frame we took, we won't get it back */ |
| 789 | new_skb = dev_alloc_skb(cm_node->cm_core->mtu); |
| 790 | BUG_ON(!new_skb); |
| 791 | /* add a replacement frame to the free tx list head */ |
| 792 | skb_queue_head(&cm_node->cm_core->tx_free_list, new_skb); |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | skb = skb_dequeue(&cm_node->cm_core->tx_free_list); |
| 797 | |
| 798 | return skb; |
| 799 | } |
| 800 | |
| 801 | |
| 802 | /** |
| 803 | * make_hashkey - generate hash key from node tuple |
| 804 | */ |
| 805 | static inline int make_hashkey(u16 loc_port, nes_addr_t loc_addr, u16 rem_port, |
| 806 | nes_addr_t rem_addr) |
| 807 | { |
| 808 | u32 hashkey = 0; |
| 809 | |
| 810 | hashkey = loc_addr + rem_addr + loc_port + rem_port; |
| 811 | hashkey = (hashkey % NES_CM_HASHTABLE_SIZE); |
| 812 | |
| 813 | return hashkey; |
| 814 | } |
| 815 | |
| 816 | |
| 817 | /** |
| 818 | * find_node - find a cm node that matches the reference cm node |
| 819 | */ |
| 820 | static struct nes_cm_node *find_node(struct nes_cm_core *cm_core, |
| 821 | u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr) |
| 822 | { |
| 823 | unsigned long flags; |
| 824 | u32 hashkey; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 825 | struct list_head *hte; |
| 826 | struct nes_cm_node *cm_node; |
| 827 | |
| 828 | /* make a hash index key for this packet */ |
| 829 | hashkey = make_hashkey(loc_port, loc_addr, rem_port, rem_addr); |
| 830 | |
| 831 | /* get a handle on the hte */ |
| 832 | hte = &cm_core->connected_nodes; |
| 833 | |
Roland Dreier | e447703 | 2008-04-23 11:55:43 -0700 | [diff] [blame] | 834 | nes_debug(NES_DBG_CM, "Searching for an owner node: " NIPQUAD_FMT ":%x from core %p->%p\n", |
| 835 | HIPQUAD(loc_addr), loc_port, cm_core, hte); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 836 | |
| 837 | /* walk list and find cm_node associated with this session ID */ |
| 838 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
Robert P. J. Day | 4e96a77 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 839 | list_for_each_entry(cm_node, hte, list) { |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 840 | /* compare quad, return node handle if a match */ |
| 841 | nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n", |
| 842 | cm_node->loc_addr, cm_node->loc_port, |
| 843 | loc_addr, loc_port, |
| 844 | cm_node->rem_addr, cm_node->rem_port, |
| 845 | rem_addr, rem_port); |
| 846 | if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) && |
| 847 | (cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) { |
| 848 | add_ref_cm_node(cm_node); |
| 849 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 850 | return cm_node; |
| 851 | } |
| 852 | } |
| 853 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 854 | |
| 855 | /* no owner node */ |
| 856 | return NULL; |
| 857 | } |
| 858 | |
| 859 | |
| 860 | /** |
| 861 | * find_listener - find a cm node listening on this addr-port pair |
| 862 | */ |
| 863 | static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core, |
| 864 | nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state) |
| 865 | { |
| 866 | unsigned long flags; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 867 | struct nes_cm_listener *listen_node; |
| 868 | |
| 869 | /* walk list and find cm_node associated with this session ID */ |
| 870 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
Robert P. J. Day | 4e96a77 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 871 | list_for_each_entry(listen_node, &cm_core->listen_list.list, list) { |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 872 | /* compare node pair, return node handle if a match */ |
| 873 | if (((listen_node->loc_addr == dst_addr) || |
| 874 | listen_node->loc_addr == 0x00000000) && |
| 875 | (listen_node->loc_port == dst_port) && |
| 876 | (listener_state & listen_node->listener_state)) { |
| 877 | atomic_inc(&listen_node->ref_count); |
| 878 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| 879 | return listen_node; |
| 880 | } |
| 881 | } |
| 882 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| 883 | |
Roland Dreier | e447703 | 2008-04-23 11:55:43 -0700 | [diff] [blame] | 884 | nes_debug(NES_DBG_CM, "Unable to find listener for " NIPQUAD_FMT ":%x\n", |
| 885 | HIPQUAD(dst_addr), dst_port); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 886 | |
| 887 | /* no listener */ |
| 888 | return NULL; |
| 889 | } |
| 890 | |
| 891 | |
| 892 | /** |
| 893 | * add_hte_node - add a cm node to the hash table |
| 894 | */ |
| 895 | static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node) |
| 896 | { |
| 897 | unsigned long flags; |
| 898 | u32 hashkey; |
| 899 | struct list_head *hte; |
| 900 | |
| 901 | if (!cm_node || !cm_core) |
| 902 | return -EINVAL; |
| 903 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 904 | nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n", |
| 905 | cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 906 | |
| 907 | /* first, make an index into our hash table */ |
| 908 | hashkey = make_hashkey(cm_node->loc_port, cm_node->loc_addr, |
| 909 | cm_node->rem_port, cm_node->rem_addr); |
| 910 | cm_node->hashkey = hashkey; |
| 911 | |
| 912 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
| 913 | |
| 914 | /* get a handle on the hash table element (list head for this slot) */ |
| 915 | hte = &cm_core->connected_nodes; |
| 916 | list_add_tail(&cm_node->list, hte); |
| 917 | atomic_inc(&cm_core->ht_node_cnt); |
| 918 | |
| 919 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 920 | |
| 921 | return 0; |
| 922 | } |
| 923 | |
| 924 | |
| 925 | /** |
| 926 | * mini_cm_dec_refcnt_listen |
| 927 | */ |
| 928 | static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core, |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 929 | struct nes_cm_listener *listener, int free_hanging_nodes) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 930 | { |
| 931 | int ret = 1; |
| 932 | unsigned long flags; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 933 | struct list_head *list_pos = NULL; |
| 934 | struct list_head *list_temp = NULL; |
| 935 | struct nes_cm_node *cm_node = NULL; |
Faisal Latif | 879e5bd | 2008-11-21 20:50:41 -0600 | [diff] [blame] | 936 | struct list_head reset_list; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 937 | |
| 938 | nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, " |
| 939 | "refcnt=%d\n", listener, free_hanging_nodes, |
| 940 | atomic_read(&listener->ref_count)); |
| 941 | /* free non-accelerated child nodes for this listener */ |
Faisal Latif | 879e5bd | 2008-11-21 20:50:41 -0600 | [diff] [blame] | 942 | INIT_LIST_HEAD(&reset_list); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 943 | if (free_hanging_nodes) { |
| 944 | spin_lock_irqsave(&cm_core->ht_lock, flags); |
| 945 | list_for_each_safe(list_pos, list_temp, |
Faisal Latif | 879e5bd | 2008-11-21 20:50:41 -0600 | [diff] [blame] | 946 | &g_cm_core->connected_nodes) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 947 | cm_node = container_of(list_pos, struct nes_cm_node, |
| 948 | list); |
| 949 | if ((cm_node->listener == listener) && |
Faisal Latif | 879e5bd | 2008-11-21 20:50:41 -0600 | [diff] [blame] | 950 | (!cm_node->accelerated)) { |
| 951 | add_ref_cm_node(cm_node); |
| 952 | list_add(&cm_node->reset_entry, &reset_list); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 953 | } |
| 954 | } |
| 955 | spin_unlock_irqrestore(&cm_core->ht_lock, flags); |
| 956 | } |
Faisal Latif | 879e5bd | 2008-11-21 20:50:41 -0600 | [diff] [blame] | 957 | |
| 958 | list_for_each_safe(list_pos, list_temp, &reset_list) { |
| 959 | cm_node = container_of(list_pos, struct nes_cm_node, |
| 960 | reset_entry); |
| 961 | cleanup_retrans_entry(cm_node); |
| 962 | send_reset(cm_node, NULL); |
| 963 | rem_ref_cm_node(cm_node->cm_core, cm_node); |
| 964 | } |
| 965 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 966 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
| 967 | if (!atomic_dec_return(&listener->ref_count)) { |
| 968 | list_del(&listener->list); |
| 969 | |
| 970 | /* decrement our listen node count */ |
| 971 | atomic_dec(&cm_core->listen_node_cnt); |
| 972 | |
| 973 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| 974 | |
| 975 | if (listener->nesvnic) { |
| 976 | nes_manage_apbvt(listener->nesvnic, listener->loc_port, |
| 977 | PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL); |
| 978 | } |
| 979 | |
| 980 | nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener); |
| 981 | |
| 982 | kfree(listener); |
Faisal Latif | a2e9c38 | 2008-02-21 08:27:32 -0600 | [diff] [blame] | 983 | listener = NULL; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 984 | ret = 0; |
| 985 | cm_listens_destroyed++; |
| 986 | } else { |
| 987 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| 988 | } |
| 989 | if (listener) { |
| 990 | if (atomic_read(&listener->pend_accepts_cnt) > 0) |
| 991 | nes_debug(NES_DBG_CM, "destroying listener (%p)" |
| 992 | " with non-zero pending accepts=%u\n", |
| 993 | listener, atomic_read(&listener->pend_accepts_cnt)); |
| 994 | } |
| 995 | |
| 996 | return ret; |
| 997 | } |
| 998 | |
| 999 | |
| 1000 | /** |
| 1001 | * mini_cm_del_listen |
| 1002 | */ |
| 1003 | static int mini_cm_del_listen(struct nes_cm_core *cm_core, |
| 1004 | struct nes_cm_listener *listener) |
| 1005 | { |
| 1006 | listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE; |
| 1007 | listener->cm_id = NULL; /* going to be destroyed pretty soon */ |
| 1008 | return mini_cm_dec_refcnt_listen(cm_core, listener, 1); |
| 1009 | } |
| 1010 | |
| 1011 | |
| 1012 | /** |
| 1013 | * mini_cm_accelerated |
| 1014 | */ |
| 1015 | static inline int mini_cm_accelerated(struct nes_cm_core *cm_core, |
| 1016 | struct nes_cm_node *cm_node) |
| 1017 | { |
| 1018 | u32 was_timer_set; |
| 1019 | cm_node->accelerated = 1; |
| 1020 | |
| 1021 | if (cm_node->accept_pend) { |
| 1022 | BUG_ON(!cm_node->listener); |
| 1023 | atomic_dec(&cm_node->listener->pend_accepts_cnt); |
| 1024 | BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0); |
| 1025 | } |
| 1026 | |
| 1027 | was_timer_set = timer_pending(&cm_core->tcp_timer); |
| 1028 | if (!was_timer_set) { |
| 1029 | cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME; |
| 1030 | add_timer(&cm_core->tcp_timer); |
| 1031 | } |
| 1032 | |
| 1033 | return 0; |
| 1034 | } |
| 1035 | |
| 1036 | |
| 1037 | /** |
Bob Sharp | 7191a0a | 2008-10-03 12:21:19 -0700 | [diff] [blame] | 1038 | * nes_addr_resolve_neigh |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1039 | */ |
Bob Sharp | 7191a0a | 2008-10-03 12:21:19 -0700 | [diff] [blame] | 1040 | static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1041 | { |
| 1042 | struct rtable *rt; |
| 1043 | struct flowi fl; |
Bob Sharp | 7191a0a | 2008-10-03 12:21:19 -0700 | [diff] [blame] | 1044 | struct neighbour *neigh; |
| 1045 | int rc = -1; |
| 1046 | DECLARE_MAC_BUF(mac); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1047 | |
| 1048 | memset(&fl, 0, sizeof fl); |
| 1049 | fl.nl_u.ip4_u.daddr = htonl(dst_ip); |
| 1050 | if (ip_route_output_key(&init_net, &rt, &fl)) { |
| 1051 | printk("%s: ip_route_output_key failed for 0x%08X\n", |
Harvey Harrison | 3371836 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 1052 | __func__, dst_ip); |
Bob Sharp | 7191a0a | 2008-10-03 12:21:19 -0700 | [diff] [blame] | 1053 | return rc; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1054 | } |
| 1055 | |
Bob Sharp | 7191a0a | 2008-10-03 12:21:19 -0700 | [diff] [blame] | 1056 | neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev); |
| 1057 | if (neigh) { |
| 1058 | if (neigh->nud_state & NUD_VALID) { |
| 1059 | nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X" |
| 1060 | " is %s, Gateway is 0x%08X \n", dst_ip, |
| 1061 | print_mac(mac, neigh->ha), ntohl(rt->rt_gateway)); |
| 1062 | nes_manage_arp_cache(nesvnic->netdev, neigh->ha, |
| 1063 | dst_ip, NES_ARP_ADD); |
| 1064 | rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL, |
| 1065 | NES_ARP_RESOLVE); |
| 1066 | } |
| 1067 | neigh_release(neigh); |
| 1068 | } |
| 1069 | |
| 1070 | if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID))) |
| 1071 | neigh_event_send(rt->u.dst.neighbour, NULL); |
| 1072 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1073 | ip_rt_put(rt); |
Bob Sharp | 7191a0a | 2008-10-03 12:21:19 -0700 | [diff] [blame] | 1074 | return rc; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1075 | } |
| 1076 | |
| 1077 | |
| 1078 | /** |
| 1079 | * make_cm_node - create a new instance of a cm node |
| 1080 | */ |
| 1081 | static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core, |
| 1082 | struct nes_vnic *nesvnic, struct nes_cm_info *cm_info, |
| 1083 | struct nes_cm_listener *listener) |
| 1084 | { |
| 1085 | struct nes_cm_node *cm_node; |
| 1086 | struct timespec ts; |
| 1087 | int arpindex = 0; |
| 1088 | struct nes_device *nesdev; |
| 1089 | struct nes_adapter *nesadapter; |
Roland Dreier | 2bd01c5 | 2008-04-23 11:52:18 -0700 | [diff] [blame] | 1090 | DECLARE_MAC_BUF(mac); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1091 | |
| 1092 | /* create an hte and cm_node for this instance */ |
| 1093 | cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); |
| 1094 | if (!cm_node) |
| 1095 | return NULL; |
| 1096 | |
| 1097 | /* set our node specific transport info */ |
| 1098 | cm_node->loc_addr = cm_info->loc_addr; |
| 1099 | cm_node->rem_addr = cm_info->rem_addr; |
| 1100 | cm_node->loc_port = cm_info->loc_port; |
| 1101 | cm_node->rem_port = cm_info->rem_port; |
| 1102 | cm_node->send_write0 = send_first; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1103 | nes_debug(NES_DBG_CM, "Make node addresses : loc = " NIPQUAD_FMT |
| 1104 | ":%x, rem = " NIPQUAD_FMT ":%x\n", |
| 1105 | HIPQUAD(cm_node->loc_addr), cm_node->loc_port, |
| 1106 | HIPQUAD(cm_node->rem_addr), cm_node->rem_port); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1107 | cm_node->listener = listener; |
| 1108 | cm_node->netdev = nesvnic->netdev; |
| 1109 | cm_node->cm_id = cm_info->cm_id; |
| 1110 | memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN); |
| 1111 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1112 | nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener, |
| 1113 | cm_node->cm_id); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1114 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1115 | spin_lock_init(&cm_node->retrans_list_lock); |
| 1116 | INIT_LIST_HEAD(&cm_node->recv_list); |
| 1117 | spin_lock_init(&cm_node->recv_list_lock); |
| 1118 | |
| 1119 | cm_node->loopbackpartner = NULL; |
| 1120 | atomic_set(&cm_node->ref_count, 1); |
| 1121 | /* associate our parent CM core */ |
| 1122 | cm_node->cm_core = cm_core; |
| 1123 | cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID; |
| 1124 | cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE; |
| 1125 | cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >> |
| 1126 | NES_CM_DEFAULT_RCV_WND_SCALE; |
| 1127 | ts = current_kernel_time(); |
| 1128 | cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec); |
| 1129 | cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) - |
Chien Tung | f2b2b59 | 2008-03-20 19:55:30 -0500 | [diff] [blame] | 1130 | sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1131 | cm_node->tcp_cntxt.rcv_nxt = 0; |
| 1132 | /* get a unique session ID , add thread_id to an upcounter to handle race */ |
| 1133 | atomic_inc(&cm_core->node_cnt); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1134 | cm_node->conn_type = cm_info->conn_type; |
| 1135 | cm_node->apbvt_set = 0; |
| 1136 | cm_node->accept_pend = 0; |
| 1137 | |
| 1138 | cm_node->nesvnic = nesvnic; |
| 1139 | /* get some device handles, for arp lookup */ |
| 1140 | nesdev = nesvnic->nesdev; |
| 1141 | nesadapter = nesdev->nesadapter; |
| 1142 | |
| 1143 | cm_node->loopbackpartner = NULL; |
| 1144 | /* get the mac addr for the remote node */ |
| 1145 | arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE); |
| 1146 | if (arpindex < 0) { |
Bob Sharp | 7191a0a | 2008-10-03 12:21:19 -0700 | [diff] [blame] | 1147 | arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr); |
| 1148 | if (arpindex < 0) { |
| 1149 | kfree(cm_node); |
| 1150 | return NULL; |
| 1151 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1152 | } |
| 1153 | |
| 1154 | /* copy the mac addr to node context */ |
| 1155 | memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN); |
Roland Dreier | 2bd01c5 | 2008-04-23 11:52:18 -0700 | [diff] [blame] | 1156 | nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %s\n", |
| 1157 | print_mac(mac, cm_node->rem_mac)); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1158 | |
| 1159 | add_hte_node(cm_core, cm_node); |
| 1160 | atomic_inc(&cm_nodes_created); |
| 1161 | |
| 1162 | return cm_node; |
| 1163 | } |
| 1164 | |
| 1165 | |
| 1166 | /** |
| 1167 | * add_ref_cm_node - destroy an instance of a cm node |
| 1168 | */ |
| 1169 | static int add_ref_cm_node(struct nes_cm_node *cm_node) |
| 1170 | { |
| 1171 | atomic_inc(&cm_node->ref_count); |
| 1172 | return 0; |
| 1173 | } |
| 1174 | |
| 1175 | |
| 1176 | /** |
| 1177 | * rem_ref_cm_node - destroy an instance of a cm node |
| 1178 | */ |
| 1179 | static int rem_ref_cm_node(struct nes_cm_core *cm_core, |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1180 | struct nes_cm_node *cm_node) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1181 | { |
| 1182 | unsigned long flags, qplockflags; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1183 | struct nes_timer_entry *recv_entry; |
| 1184 | struct iw_cm_id *cm_id; |
| 1185 | struct list_head *list_core, *list_node_temp; |
| 1186 | struct nes_qp *nesqp; |
| 1187 | |
| 1188 | if (!cm_node) |
| 1189 | return -EINVAL; |
| 1190 | |
| 1191 | spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags); |
| 1192 | if (atomic_dec_return(&cm_node->ref_count)) { |
| 1193 | spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); |
| 1194 | return 0; |
| 1195 | } |
| 1196 | list_del(&cm_node->list); |
| 1197 | atomic_dec(&cm_core->ht_node_cnt); |
| 1198 | spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags); |
| 1199 | |
| 1200 | /* if the node is destroyed before connection was accelerated */ |
| 1201 | if (!cm_node->accelerated && cm_node->accept_pend) { |
| 1202 | BUG_ON(!cm_node->listener); |
| 1203 | atomic_dec(&cm_node->listener->pend_accepts_cnt); |
| 1204 | BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0); |
| 1205 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1206 | BUG_ON(cm_node->send_entry); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1207 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); |
| 1208 | list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1209 | recv_entry = container_of(list_core, struct nes_timer_entry, |
| 1210 | list); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1211 | list_del(&recv_entry->list); |
| 1212 | cm_id = cm_node->cm_id; |
| 1213 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1214 | nesqp = (struct nes_qp *)recv_entry->skb; |
| 1215 | spin_lock_irqsave(&nesqp->lock, qplockflags); |
| 1216 | if (nesqp->cm_id) { |
| 1217 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A " |
| 1218 | "NES_TIMER_TYPE_CLOSE with something to do!\n", |
| 1219 | nesqp->hwqp.qp_id, cm_id); |
| 1220 | nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED; |
| 1221 | nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT; |
| 1222 | nesqp->ibqp_state = IB_QPS_ERR; |
| 1223 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); |
| 1224 | nes_cm_disconn(nesqp); |
| 1225 | } else { |
| 1226 | spin_unlock_irqrestore(&nesqp->lock, qplockflags); |
| 1227 | nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A " |
| 1228 | "NES_TIMER_TYPE_CLOSE with nothing to do!\n", |
| 1229 | nesqp->hwqp.qp_id, cm_id); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1230 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1231 | cm_id->rem_ref(cm_id); |
| 1232 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1233 | kfree(recv_entry); |
| 1234 | spin_lock_irqsave(&cm_node->recv_list_lock, flags); |
| 1235 | } |
| 1236 | spin_unlock_irqrestore(&cm_node->recv_list_lock, flags); |
| 1237 | |
| 1238 | if (cm_node->listener) { |
| 1239 | mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0); |
| 1240 | } else { |
| 1241 | if (cm_node->apbvt_set && cm_node->nesvnic) { |
| 1242 | nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port, |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1243 | PCI_FUNC( |
| 1244 | cm_node->nesvnic->nesdev->pcidev->devfn), |
| 1245 | NES_MANAGE_APBVT_DEL); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1246 | } |
| 1247 | } |
| 1248 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1249 | atomic_dec(&cm_core->node_cnt); |
| 1250 | atomic_inc(&cm_nodes_destroyed); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1251 | nesqp = cm_node->nesqp; |
| 1252 | if (nesqp) { |
| 1253 | nesqp->cm_node = NULL; |
| 1254 | nes_rem_ref(&nesqp->ibqp); |
| 1255 | cm_node->nesqp = NULL; |
| 1256 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1257 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1258 | cm_node->freed = 1; |
| 1259 | kfree(cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1260 | return 0; |
| 1261 | } |
| 1262 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1263 | /** |
| 1264 | * process_options |
| 1265 | */ |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1266 | static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc, |
| 1267 | u32 optionsize, u32 syn_packet) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1268 | { |
| 1269 | u32 tmp; |
| 1270 | u32 offset = 0; |
| 1271 | union all_known_options *all_options; |
| 1272 | char got_mss_option = 0; |
| 1273 | |
| 1274 | while (offset < optionsize) { |
| 1275 | all_options = (union all_known_options *)(optionsloc + offset); |
| 1276 | switch (all_options->as_base.optionnum) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1277 | case OPTION_NUMBER_END: |
| 1278 | offset = optionsize; |
| 1279 | break; |
| 1280 | case OPTION_NUMBER_NONE: |
| 1281 | offset += 1; |
| 1282 | continue; |
| 1283 | case OPTION_NUMBER_MSS: |
| 1284 | nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d " |
| 1285 | "Size: %d\n", __func__, |
| 1286 | all_options->as_mss.length, offset, optionsize); |
| 1287 | got_mss_option = 1; |
| 1288 | if (all_options->as_mss.length != 4) { |
| 1289 | return 1; |
| 1290 | } else { |
| 1291 | tmp = ntohs(all_options->as_mss.mss); |
| 1292 | if (tmp > 0 && tmp < |
| 1293 | cm_node->tcp_cntxt.mss) |
| 1294 | cm_node->tcp_cntxt.mss = tmp; |
| 1295 | } |
| 1296 | break; |
| 1297 | case OPTION_NUMBER_WINDOW_SCALE: |
| 1298 | cm_node->tcp_cntxt.snd_wscale = |
| 1299 | all_options->as_windowscale.shiftcount; |
| 1300 | break; |
| 1301 | case OPTION_NUMBER_WRITE0: |
| 1302 | cm_node->send_write0 = 1; |
| 1303 | break; |
| 1304 | default: |
| 1305 | nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n", |
| 1306 | all_options->as_base.optionnum); |
| 1307 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1308 | } |
| 1309 | offset += all_options->as_base.length; |
| 1310 | } |
| 1311 | if ((!got_mss_option) && (syn_packet)) |
| 1312 | cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS; |
| 1313 | return 0; |
| 1314 | } |
| 1315 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1316 | static void drop_packet(struct sk_buff *skb) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1317 | { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1318 | atomic_inc(&cm_accel_dropped_pkts); |
| 1319 | dev_kfree_skb_any(skb); |
| 1320 | } |
| 1321 | |
| 1322 | static void handle_fin_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, |
| 1323 | struct tcphdr *tcph) |
| 1324 | { |
| 1325 | atomic_inc(&cm_resets_recvd); |
| 1326 | nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. " |
| 1327 | "refcnt=%d\n", cm_node, cm_node->state, |
| 1328 | atomic_read(&cm_node->ref_count)); |
| 1329 | cm_node->tcp_cntxt.rcv_nxt++; |
| 1330 | cleanup_retrans_entry(cm_node); |
| 1331 | switch (cm_node->state) { |
| 1332 | case NES_CM_STATE_SYN_RCVD: |
| 1333 | case NES_CM_STATE_SYN_SENT: |
| 1334 | case NES_CM_STATE_ESTABLISHED: |
| 1335 | case NES_CM_STATE_MPAREQ_SENT: |
| 1336 | cm_node->state = NES_CM_STATE_LAST_ACK; |
| 1337 | send_fin(cm_node, skb); |
| 1338 | break; |
| 1339 | case NES_CM_STATE_FIN_WAIT1: |
| 1340 | cm_node->state = NES_CM_STATE_CLOSING; |
| 1341 | send_ack(cm_node, skb); |
| 1342 | break; |
| 1343 | case NES_CM_STATE_FIN_WAIT2: |
| 1344 | cm_node->state = NES_CM_STATE_TIME_WAIT; |
| 1345 | send_ack(cm_node, skb); |
| 1346 | cm_node->state = NES_CM_STATE_CLOSED; |
| 1347 | break; |
| 1348 | case NES_CM_STATE_TSA: |
| 1349 | default: |
| 1350 | nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n", |
| 1351 | cm_node, cm_node->state); |
| 1352 | drop_packet(skb); |
| 1353 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1354 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1355 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1356 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1357 | |
| 1358 | static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, |
| 1359 | struct tcphdr *tcph) |
| 1360 | { |
| 1361 | |
| 1362 | int reset = 0; /* whether to send reset in case of err.. */ |
Faisal Latif | 183ecfa | 2008-11-21 20:50:46 -0600 | [diff] [blame] | 1363 | int passive_state; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1364 | atomic_inc(&cm_resets_recvd); |
| 1365 | nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u." |
| 1366 | " refcnt=%d\n", cm_node, cm_node->state, |
| 1367 | atomic_read(&cm_node->ref_count)); |
| 1368 | cleanup_retrans_entry(cm_node); |
| 1369 | switch (cm_node->state) { |
| 1370 | case NES_CM_STATE_SYN_SENT: |
| 1371 | case NES_CM_STATE_MPAREQ_SENT: |
| 1372 | nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p " |
| 1373 | "listener=%p state=%d\n", __func__, __LINE__, cm_node, |
| 1374 | cm_node->listener, cm_node->state); |
| 1375 | active_open_err(cm_node, skb, reset); |
| 1376 | break; |
Faisal Latif | 183ecfa | 2008-11-21 20:50:46 -0600 | [diff] [blame] | 1377 | case NES_CM_STATE_MPAREQ_RCVD: |
| 1378 | passive_state = atomic_add_return(1, &cm_node->passive_state); |
| 1379 | if (passive_state == NES_SEND_RESET_EVENT) |
| 1380 | create_event(cm_node, NES_CM_EVENT_RESET); |
| 1381 | cleanup_retrans_entry(cm_node); |
| 1382 | cm_node->state = NES_CM_STATE_CLOSED; |
| 1383 | dev_kfree_skb_any(skb); |
| 1384 | break; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1385 | case NES_CM_STATE_ESTABLISHED: |
| 1386 | case NES_CM_STATE_SYN_RCVD: |
| 1387 | case NES_CM_STATE_LISTENING: |
| 1388 | nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__); |
| 1389 | passive_open_err(cm_node, skb, reset); |
| 1390 | break; |
| 1391 | case NES_CM_STATE_TSA: |
Faisal Latif | 183ecfa | 2008-11-21 20:50:46 -0600 | [diff] [blame] | 1392 | active_open_err(cm_node, skb, reset); |
| 1393 | break; |
| 1394 | case NES_CM_STATE_CLOSED: |
| 1395 | cleanup_retrans_entry(cm_node); |
| 1396 | drop_packet(skb); |
| 1397 | break; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1398 | default: |
Faisal Latif | 183ecfa | 2008-11-21 20:50:46 -0600 | [diff] [blame] | 1399 | drop_packet(skb); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1400 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1401 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1402 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1403 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1404 | static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb, |
| 1405 | enum nes_cm_event_type type) |
| 1406 | { |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1407 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1408 | int ret; |
| 1409 | int datasize = skb->len; |
| 1410 | u8 *dataloc = skb->data; |
| 1411 | ret = parse_mpa(cm_node, dataloc, datasize); |
| 1412 | if (ret < 0) { |
| 1413 | nes_debug(NES_DBG_CM, "didn't like MPA Request\n"); |
| 1414 | if (type == NES_CM_EVENT_CONNECTED) { |
| 1415 | nes_debug(NES_DBG_CM, "%s[%u] create abort for " |
| 1416 | "cm_node=%p listener=%p state=%d\n", __func__, |
| 1417 | __LINE__, cm_node, cm_node->listener, |
| 1418 | cm_node->state); |
| 1419 | active_open_err(cm_node, skb, 1); |
| 1420 | } else { |
| 1421 | passive_open_err(cm_node, skb, 1); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1422 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1423 | } else { |
| 1424 | cleanup_retrans_entry(cm_node); |
| 1425 | dev_kfree_skb_any(skb); |
| 1426 | if (type == NES_CM_EVENT_CONNECTED) |
| 1427 | cm_node->state = NES_CM_STATE_TSA; |
Faisal Latif | 183ecfa | 2008-11-21 20:50:46 -0600 | [diff] [blame] | 1428 | else |
| 1429 | atomic_set(&cm_node->passive_state, |
| 1430 | NES_PASSIVE_STATE_INDICATED); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1431 | create_event(cm_node, type); |
| 1432 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1433 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1434 | return ; |
| 1435 | } |
| 1436 | |
| 1437 | static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb) |
| 1438 | { |
| 1439 | switch (cm_node->state) { |
| 1440 | case NES_CM_STATE_SYN_SENT: |
| 1441 | case NES_CM_STATE_MPAREQ_SENT: |
| 1442 | nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p " |
| 1443 | "listener=%p state=%d\n", __func__, __LINE__, cm_node, |
| 1444 | cm_node->listener, cm_node->state); |
| 1445 | active_open_err(cm_node, skb, 1); |
| 1446 | break; |
| 1447 | case NES_CM_STATE_ESTABLISHED: |
| 1448 | case NES_CM_STATE_SYN_RCVD: |
| 1449 | passive_open_err(cm_node, skb, 1); |
| 1450 | break; |
| 1451 | case NES_CM_STATE_TSA: |
| 1452 | default: |
| 1453 | drop_packet(skb); |
| 1454 | } |
| 1455 | } |
| 1456 | |
| 1457 | static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph, |
| 1458 | struct sk_buff *skb) |
| 1459 | { |
| 1460 | int err; |
| 1461 | |
| 1462 | err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1; |
| 1463 | if (err) |
| 1464 | active_open_err(cm_node, skb, 1); |
| 1465 | |
| 1466 | return err; |
| 1467 | } |
| 1468 | |
| 1469 | static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph, |
| 1470 | struct sk_buff *skb) |
| 1471 | { |
| 1472 | int err = 0; |
| 1473 | u32 seq; |
| 1474 | u32 ack_seq; |
| 1475 | u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num; |
| 1476 | u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt; |
| 1477 | u32 rcv_wnd; |
| 1478 | seq = ntohl(tcph->seq); |
| 1479 | ack_seq = ntohl(tcph->ack_seq); |
| 1480 | rcv_wnd = cm_node->tcp_cntxt.rcv_wnd; |
| 1481 | if (ack_seq != loc_seq_num) |
| 1482 | err = 1; |
| 1483 | else if ((seq + rcv_wnd) < rcv_nxt) |
| 1484 | err = 1; |
| 1485 | if (err) { |
| 1486 | nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p " |
| 1487 | "listener=%p state=%d\n", __func__, __LINE__, cm_node, |
| 1488 | cm_node->listener, cm_node->state); |
| 1489 | indicate_pkt_err(cm_node, skb); |
| 1490 | nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X " |
| 1491 | "rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt, |
| 1492 | rcv_wnd); |
| 1493 | } |
| 1494 | return err; |
| 1495 | } |
| 1496 | |
| 1497 | /* |
| 1498 | * handle_syn_pkt() is for Passive node. The syn packet is received when a node |
| 1499 | * is created with a listener or it may comein as rexmitted packet which in |
| 1500 | * that case will be just dropped. |
| 1501 | */ |
| 1502 | |
| 1503 | static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, |
| 1504 | struct tcphdr *tcph) |
| 1505 | { |
| 1506 | int ret; |
| 1507 | u32 inc_sequence; |
| 1508 | int optionsize; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1509 | |
| 1510 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1511 | skb_pull(skb, tcph->doff << 2); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1512 | inc_sequence = ntohl(tcph->seq); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1513 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1514 | switch (cm_node->state) { |
| 1515 | case NES_CM_STATE_SYN_SENT: |
| 1516 | case NES_CM_STATE_MPAREQ_SENT: |
| 1517 | /* Rcvd syn on active open connection*/ |
| 1518 | active_open_err(cm_node, skb, 1); |
| 1519 | break; |
| 1520 | case NES_CM_STATE_LISTENING: |
| 1521 | /* Passive OPEN */ |
| 1522 | cm_node->accept_pend = 1; |
| 1523 | atomic_inc(&cm_node->listener->pend_accepts_cnt); |
| 1524 | if (atomic_read(&cm_node->listener->pend_accepts_cnt) > |
| 1525 | cm_node->listener->backlog) { |
| 1526 | nes_debug(NES_DBG_CM, "drop syn due to backlog " |
| 1527 | "pressure \n"); |
| 1528 | cm_backlog_drops++; |
| 1529 | passive_open_err(cm_node, skb, 0); |
| 1530 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1531 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1532 | ret = handle_tcp_options(cm_node, tcph, skb, optionsize, |
| 1533 | 1); |
| 1534 | if (ret) { |
| 1535 | passive_open_err(cm_node, skb, 0); |
| 1536 | /* drop pkt */ |
| 1537 | break; |
| 1538 | } |
| 1539 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; |
| 1540 | BUG_ON(cm_node->send_entry); |
| 1541 | cm_node->state = NES_CM_STATE_SYN_RCVD; |
| 1542 | send_syn(cm_node, 1, skb); |
| 1543 | break; |
| 1544 | case NES_CM_STATE_TSA: |
| 1545 | case NES_CM_STATE_ESTABLISHED: |
| 1546 | case NES_CM_STATE_FIN_WAIT1: |
| 1547 | case NES_CM_STATE_FIN_WAIT2: |
| 1548 | case NES_CM_STATE_MPAREQ_RCVD: |
| 1549 | case NES_CM_STATE_LAST_ACK: |
| 1550 | case NES_CM_STATE_CLOSING: |
| 1551 | case NES_CM_STATE_UNKNOWN: |
| 1552 | case NES_CM_STATE_CLOSED: |
| 1553 | default: |
| 1554 | drop_packet(skb); |
| 1555 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1556 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1557 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1558 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1559 | static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, |
| 1560 | struct tcphdr *tcph) |
| 1561 | { |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1562 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1563 | int ret; |
| 1564 | u32 inc_sequence; |
| 1565 | int optionsize; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1566 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1567 | optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); |
| 1568 | skb_pull(skb, tcph->doff << 2); |
| 1569 | inc_sequence = ntohl(tcph->seq); |
| 1570 | switch (cm_node->state) { |
| 1571 | case NES_CM_STATE_SYN_SENT: |
| 1572 | /* active open */ |
| 1573 | if (check_syn(cm_node, tcph, skb)) |
| 1574 | return; |
| 1575 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
| 1576 | /* setup options */ |
| 1577 | ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0); |
| 1578 | if (ret) { |
| 1579 | nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n", |
| 1580 | cm_node); |
| 1581 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1582 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1583 | cleanup_retrans_entry(cm_node); |
| 1584 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; |
| 1585 | send_mpa_request(cm_node, skb); |
| 1586 | cm_node->state = NES_CM_STATE_MPAREQ_SENT; |
| 1587 | break; |
| 1588 | case NES_CM_STATE_MPAREQ_RCVD: |
| 1589 | /* passive open, so should not be here */ |
| 1590 | passive_open_err(cm_node, skb, 1); |
| 1591 | break; |
| 1592 | case NES_CM_STATE_ESTABLISHED: |
| 1593 | case NES_CM_STATE_FIN_WAIT1: |
| 1594 | case NES_CM_STATE_FIN_WAIT2: |
| 1595 | case NES_CM_STATE_LAST_ACK: |
| 1596 | case NES_CM_STATE_TSA: |
| 1597 | case NES_CM_STATE_CLOSING: |
| 1598 | case NES_CM_STATE_UNKNOWN: |
| 1599 | case NES_CM_STATE_CLOSED: |
| 1600 | case NES_CM_STATE_MPAREQ_SENT: |
| 1601 | default: |
| 1602 | drop_packet(skb); |
| 1603 | break; |
| 1604 | } |
| 1605 | } |
| 1606 | |
| 1607 | static void handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, |
| 1608 | struct tcphdr *tcph) |
| 1609 | { |
| 1610 | int datasize = 0; |
| 1611 | u32 inc_sequence; |
| 1612 | u32 rem_seq_ack; |
| 1613 | u32 rem_seq; |
| 1614 | if (check_seq(cm_node, tcph, skb)) |
| 1615 | return; |
| 1616 | |
| 1617 | skb_pull(skb, tcph->doff << 2); |
| 1618 | inc_sequence = ntohl(tcph->seq); |
| 1619 | rem_seq = ntohl(tcph->seq); |
| 1620 | rem_seq_ack = ntohl(tcph->ack_seq); |
| 1621 | datasize = skb->len; |
| 1622 | |
| 1623 | switch (cm_node->state) { |
| 1624 | case NES_CM_STATE_SYN_RCVD: |
| 1625 | /* Passive OPEN */ |
| 1626 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
| 1627 | cm_node->state = NES_CM_STATE_ESTABLISHED; |
| 1628 | if (datasize) { |
| 1629 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; |
| 1630 | cm_node->state = NES_CM_STATE_MPAREQ_RCVD; |
| 1631 | handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_MPA_REQ); |
| 1632 | } else { /* rcvd ACK only */ |
| 1633 | dev_kfree_skb_any(skb); |
| 1634 | cleanup_retrans_entry(cm_node); |
| 1635 | } |
| 1636 | break; |
| 1637 | case NES_CM_STATE_ESTABLISHED: |
| 1638 | /* Passive OPEN */ |
| 1639 | /* We expect mpa frame to be received only */ |
| 1640 | if (datasize) { |
| 1641 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; |
| 1642 | cm_node->state = NES_CM_STATE_MPAREQ_RCVD; |
| 1643 | handle_rcv_mpa(cm_node, skb, |
| 1644 | NES_CM_EVENT_MPA_REQ); |
| 1645 | } else |
| 1646 | drop_packet(skb); |
| 1647 | break; |
| 1648 | case NES_CM_STATE_MPAREQ_SENT: |
| 1649 | cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); |
| 1650 | if (datasize) { |
| 1651 | cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; |
| 1652 | handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_CONNECTED); |
| 1653 | } else { /* Could be just an ack pkt.. */ |
| 1654 | cleanup_retrans_entry(cm_node); |
| 1655 | dev_kfree_skb_any(skb); |
| 1656 | } |
| 1657 | break; |
| 1658 | case NES_CM_STATE_FIN_WAIT1: |
| 1659 | case NES_CM_STATE_SYN_SENT: |
| 1660 | case NES_CM_STATE_FIN_WAIT2: |
| 1661 | case NES_CM_STATE_TSA: |
| 1662 | case NES_CM_STATE_CLOSED: |
| 1663 | case NES_CM_STATE_MPAREQ_RCVD: |
| 1664 | case NES_CM_STATE_LAST_ACK: |
| 1665 | case NES_CM_STATE_CLOSING: |
| 1666 | case NES_CM_STATE_UNKNOWN: |
| 1667 | default: |
| 1668 | drop_packet(skb); |
| 1669 | break; |
| 1670 | } |
| 1671 | } |
| 1672 | |
| 1673 | |
| 1674 | |
| 1675 | static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, |
| 1676 | struct sk_buff *skb, int optionsize, int passive) |
| 1677 | { |
| 1678 | u8 *optionsloc = (u8 *)&tcph[1]; |
| 1679 | if (optionsize) { |
| 1680 | if (process_options(cm_node, optionsloc, optionsize, |
| 1681 | (u32)tcph->syn)) { |
| 1682 | nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n", |
| 1683 | __func__, cm_node); |
| 1684 | if (passive) |
| 1685 | passive_open_err(cm_node, skb, 0); |
| 1686 | else |
| 1687 | active_open_err(cm_node, skb, 0); |
| 1688 | return 1; |
| 1689 | } |
| 1690 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1691 | |
| 1692 | cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) << |
| 1693 | cm_node->tcp_cntxt.snd_wscale; |
| 1694 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1695 | if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1696 | cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1697 | return 0; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1698 | } |
| 1699 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1700 | /* |
| 1701 | * active_open_err() will send reset() if flag set.. |
| 1702 | * It will also send ABORT event. |
| 1703 | */ |
| 1704 | |
| 1705 | static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb, |
| 1706 | int reset) |
| 1707 | { |
| 1708 | cleanup_retrans_entry(cm_node); |
| 1709 | if (reset) { |
| 1710 | nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, " |
| 1711 | "state=%d\n", cm_node, cm_node->state); |
| 1712 | add_ref_cm_node(cm_node); |
| 1713 | send_reset(cm_node, skb); |
| 1714 | } else |
| 1715 | dev_kfree_skb_any(skb); |
| 1716 | |
| 1717 | cm_node->state = NES_CM_STATE_CLOSED; |
| 1718 | create_event(cm_node, NES_CM_EVENT_ABORTED); |
| 1719 | } |
| 1720 | |
| 1721 | /* |
| 1722 | * passive_open_err() will either do a reset() or will free up the skb and |
| 1723 | * remove the cm_node. |
| 1724 | */ |
| 1725 | |
| 1726 | static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb, |
| 1727 | int reset) |
| 1728 | { |
| 1729 | cleanup_retrans_entry(cm_node); |
| 1730 | cm_node->state = NES_CM_STATE_CLOSED; |
| 1731 | if (reset) { |
| 1732 | nes_debug(NES_DBG_CM, "passive_open_err sending RST for " |
| 1733 | "cm_node=%p state =%d\n", cm_node, cm_node->state); |
| 1734 | send_reset(cm_node, skb); |
| 1735 | } else { |
| 1736 | dev_kfree_skb_any(skb); |
| 1737 | rem_ref_cm_node(cm_node->cm_core, cm_node); |
| 1738 | } |
| 1739 | } |
| 1740 | |
| 1741 | /* |
| 1742 | * free_retrans_entry() routines assumes that the retrans_list_lock has |
| 1743 | * been acquired before calling. |
| 1744 | */ |
| 1745 | static void free_retrans_entry(struct nes_cm_node *cm_node) |
| 1746 | { |
| 1747 | struct nes_timer_entry *send_entry; |
| 1748 | send_entry = cm_node->send_entry; |
| 1749 | if (send_entry) { |
| 1750 | cm_node->send_entry = NULL; |
| 1751 | dev_kfree_skb_any(send_entry->skb); |
| 1752 | kfree(send_entry); |
| 1753 | rem_ref_cm_node(cm_node->cm_core, cm_node); |
| 1754 | } |
| 1755 | } |
| 1756 | |
| 1757 | static void cleanup_retrans_entry(struct nes_cm_node *cm_node) |
| 1758 | { |
| 1759 | unsigned long flags; |
| 1760 | |
| 1761 | spin_lock_irqsave(&cm_node->retrans_list_lock, flags); |
| 1762 | free_retrans_entry(cm_node); |
| 1763 | spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); |
| 1764 | } |
| 1765 | |
| 1766 | /** |
| 1767 | * process_packet |
| 1768 | * Returns skb if to be freed, else it will return NULL if already used.. |
| 1769 | */ |
| 1770 | static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb, |
| 1771 | struct nes_cm_core *cm_core) |
| 1772 | { |
| 1773 | enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN; |
| 1774 | struct tcphdr *tcph = tcp_hdr(skb); |
| 1775 | skb_pull(skb, ip_hdr(skb)->ihl << 2); |
| 1776 | |
| 1777 | nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d " |
| 1778 | "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn, |
| 1779 | tcph->ack, tcph->rst, tcph->fin); |
| 1780 | |
| 1781 | if (tcph->rst) |
| 1782 | pkt_type = NES_PKT_TYPE_RST; |
| 1783 | else if (tcph->syn) { |
| 1784 | pkt_type = NES_PKT_TYPE_SYN; |
| 1785 | if (tcph->ack) |
| 1786 | pkt_type = NES_PKT_TYPE_SYNACK; |
| 1787 | } else if (tcph->fin) |
| 1788 | pkt_type = NES_PKT_TYPE_FIN; |
| 1789 | else if (tcph->ack) |
| 1790 | pkt_type = NES_PKT_TYPE_ACK; |
| 1791 | |
| 1792 | switch (pkt_type) { |
| 1793 | case NES_PKT_TYPE_SYN: |
| 1794 | handle_syn_pkt(cm_node, skb, tcph); |
| 1795 | break; |
| 1796 | case NES_PKT_TYPE_SYNACK: |
| 1797 | handle_synack_pkt(cm_node, skb, tcph); |
| 1798 | break; |
| 1799 | case NES_PKT_TYPE_ACK: |
| 1800 | handle_ack_pkt(cm_node, skb, tcph); |
| 1801 | break; |
| 1802 | case NES_PKT_TYPE_RST: |
| 1803 | handle_rst_pkt(cm_node, skb, tcph); |
| 1804 | break; |
| 1805 | case NES_PKT_TYPE_FIN: |
| 1806 | handle_fin_pkt(cm_node, skb, tcph); |
| 1807 | break; |
| 1808 | default: |
| 1809 | drop_packet(skb); |
| 1810 | break; |
| 1811 | } |
| 1812 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1813 | |
| 1814 | /** |
| 1815 | * mini_cm_listen - create a listen node with params |
| 1816 | */ |
| 1817 | static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core, |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1818 | struct nes_vnic *nesvnic, struct nes_cm_info *cm_info) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1819 | { |
| 1820 | struct nes_cm_listener *listener; |
| 1821 | unsigned long flags; |
| 1822 | |
| 1823 | nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n", |
| 1824 | cm_info->loc_addr, cm_info->loc_port); |
| 1825 | |
| 1826 | /* cannot have multiple matching listeners */ |
| 1827 | listener = find_listener(cm_core, htonl(cm_info->loc_addr), |
| 1828 | htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE); |
| 1829 | if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) { |
| 1830 | /* find automatically incs ref count ??? */ |
| 1831 | atomic_dec(&listener->ref_count); |
| 1832 | nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n"); |
| 1833 | return NULL; |
| 1834 | } |
| 1835 | |
| 1836 | if (!listener) { |
| 1837 | /* create a CM listen node (1/2 node to compare incoming traffic to) */ |
| 1838 | listener = kzalloc(sizeof(*listener), GFP_ATOMIC); |
| 1839 | if (!listener) { |
| 1840 | nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n"); |
| 1841 | return NULL; |
| 1842 | } |
| 1843 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1844 | listener->loc_addr = htonl(cm_info->loc_addr); |
| 1845 | listener->loc_port = htons(cm_info->loc_port); |
| 1846 | listener->reused_node = 0; |
| 1847 | |
| 1848 | atomic_set(&listener->ref_count, 1); |
| 1849 | } |
| 1850 | /* pasive case */ |
| 1851 | /* find already inc'ed the ref count */ |
| 1852 | else { |
| 1853 | listener->reused_node = 1; |
| 1854 | } |
| 1855 | |
| 1856 | listener->cm_id = cm_info->cm_id; |
| 1857 | atomic_set(&listener->pend_accepts_cnt, 0); |
| 1858 | listener->cm_core = cm_core; |
| 1859 | listener->nesvnic = nesvnic; |
| 1860 | atomic_inc(&cm_core->node_cnt); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1861 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1862 | listener->conn_type = cm_info->conn_type; |
| 1863 | listener->backlog = cm_info->backlog; |
| 1864 | listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE; |
| 1865 | |
| 1866 | if (!listener->reused_node) { |
| 1867 | spin_lock_irqsave(&cm_core->listen_list_lock, flags); |
| 1868 | list_add(&listener->list, &cm_core->listen_list.list); |
| 1869 | spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); |
| 1870 | atomic_inc(&cm_core->listen_node_cnt); |
| 1871 | } |
| 1872 | |
| 1873 | nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x," |
| 1874 | " listener = %p, backlog = %d, cm_id = %p.\n", |
| 1875 | cm_info->loc_addr, cm_info->loc_port, |
| 1876 | listener, listener->backlog, listener->cm_id); |
| 1877 | |
| 1878 | return listener; |
| 1879 | } |
| 1880 | |
| 1881 | |
| 1882 | /** |
| 1883 | * mini_cm_connect - make a connection node with params |
| 1884 | */ |
Faisal Latif | 54c86a8 | 2008-09-30 14:47:27 -0700 | [diff] [blame] | 1885 | static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core, |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1886 | struct nes_vnic *nesvnic, u16 private_data_len, |
| 1887 | void *private_data, struct nes_cm_info *cm_info) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1888 | { |
| 1889 | int ret = 0; |
| 1890 | struct nes_cm_node *cm_node; |
| 1891 | struct nes_cm_listener *loopbackremotelistener; |
| 1892 | struct nes_cm_node *loopbackremotenode; |
| 1893 | struct nes_cm_info loopback_cm_info; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1894 | u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len; |
| 1895 | struct ietf_mpa_frame *mpa_frame = NULL; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1896 | |
| 1897 | /* create a CM connection node */ |
| 1898 | cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL); |
| 1899 | if (!cm_node) |
| 1900 | return NULL; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1901 | mpa_frame = &cm_node->mpa_frame; |
| 1902 | strcpy(mpa_frame->key, IEFT_MPA_KEY_REQ); |
| 1903 | mpa_frame->flags = IETF_MPA_FLAGS_CRC; |
| 1904 | mpa_frame->rev = IETF_MPA_VERSION; |
| 1905 | mpa_frame->priv_data_len = htons(private_data_len); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1906 | |
Glenn Streiff | 7495ab6 | 2008-04-29 13:46:54 -0700 | [diff] [blame] | 1907 | /* set our node side to client (active) side */ |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1908 | cm_node->tcp_cntxt.client = 1; |
| 1909 | cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE; |
| 1910 | |
| 1911 | if (cm_info->loc_addr == cm_info->rem_addr) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1912 | loopbackremotelistener = find_listener(cm_core, |
| 1913 | ntohl(nesvnic->local_ipaddr), cm_node->rem_port, |
| 1914 | NES_CM_LISTENER_ACTIVE_STATE); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1915 | if (loopbackremotelistener == NULL) { |
| 1916 | create_event(cm_node, NES_CM_EVENT_ABORTED); |
| 1917 | } else { |
| 1918 | atomic_inc(&cm_loopbacks); |
| 1919 | loopback_cm_info = *cm_info; |
| 1920 | loopback_cm_info.loc_port = cm_info->rem_port; |
| 1921 | loopback_cm_info.rem_port = cm_info->loc_port; |
| 1922 | loopback_cm_info.cm_id = loopbackremotelistener->cm_id; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1923 | loopbackremotenode = make_cm_node(cm_core, nesvnic, |
| 1924 | &loopback_cm_info, loopbackremotelistener); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1925 | loopbackremotenode->loopbackpartner = cm_node; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1926 | loopbackremotenode->tcp_cntxt.rcv_wscale = |
| 1927 | NES_CM_DEFAULT_RCV_WND_SCALE; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1928 | cm_node->loopbackpartner = loopbackremotenode; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1929 | memcpy(loopbackremotenode->mpa_frame_buf, private_data, |
| 1930 | private_data_len); |
| 1931 | loopbackremotenode->mpa_frame_size = private_data_len; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1932 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1933 | /* we are done handling this state. */ |
| 1934 | /* set node to a TSA state */ |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1935 | cm_node->state = NES_CM_STATE_TSA; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1936 | cm_node->tcp_cntxt.rcv_nxt = |
| 1937 | loopbackremotenode->tcp_cntxt.loc_seq_num; |
| 1938 | loopbackremotenode->tcp_cntxt.rcv_nxt = |
| 1939 | cm_node->tcp_cntxt.loc_seq_num; |
| 1940 | cm_node->tcp_cntxt.max_snd_wnd = |
| 1941 | loopbackremotenode->tcp_cntxt.rcv_wnd; |
| 1942 | loopbackremotenode->tcp_cntxt.max_snd_wnd = |
| 1943 | cm_node->tcp_cntxt.rcv_wnd; |
| 1944 | cm_node->tcp_cntxt.snd_wnd = |
| 1945 | loopbackremotenode->tcp_cntxt.rcv_wnd; |
| 1946 | loopbackremotenode->tcp_cntxt.snd_wnd = |
| 1947 | cm_node->tcp_cntxt.rcv_wnd; |
| 1948 | cm_node->tcp_cntxt.snd_wscale = |
| 1949 | loopbackremotenode->tcp_cntxt.rcv_wscale; |
| 1950 | loopbackremotenode->tcp_cntxt.snd_wscale = |
| 1951 | cm_node->tcp_cntxt.rcv_wscale; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1952 | |
| 1953 | create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ); |
| 1954 | } |
| 1955 | return cm_node; |
| 1956 | } |
| 1957 | |
| 1958 | /* set our node side to client (active) side */ |
| 1959 | cm_node->tcp_cntxt.client = 1; |
| 1960 | /* init our MPA frame ptr */ |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1961 | memcpy(mpa_frame->priv_data, private_data, private_data_len); |
| 1962 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1963 | cm_node->mpa_frame_size = mpa_frame_size; |
| 1964 | |
| 1965 | /* send a syn and goto syn sent state */ |
| 1966 | cm_node->state = NES_CM_STATE_SYN_SENT; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1967 | ret = send_syn(cm_node, 0, NULL); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1968 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1969 | if (ret) { |
| 1970 | /* error in sending the syn free up the cm_node struct */ |
| 1971 | nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest " |
| 1972 | "addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n", |
| 1973 | cm_node->rem_addr, cm_node->rem_port, cm_node, |
| 1974 | cm_node->cm_id); |
| 1975 | rem_ref_cm_node(cm_node->cm_core, cm_node); |
| 1976 | cm_node = NULL; |
| 1977 | } |
| 1978 | |
| 1979 | if (cm_node) |
| 1980 | nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X," |
| 1981 | "port=0x%04x, cm_node=%p, cm_id = %p.\n", |
| 1982 | cm_node->rem_addr, cm_node->rem_port, cm_node, |
| 1983 | cm_node->cm_id); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1984 | |
| 1985 | return cm_node; |
| 1986 | } |
| 1987 | |
| 1988 | |
| 1989 | /** |
| 1990 | * mini_cm_accept - accept a connection |
| 1991 | * This function is never called |
| 1992 | */ |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 1993 | static int mini_cm_accept(struct nes_cm_core *cm_core, |
| 1994 | struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 1995 | { |
| 1996 | return 0; |
| 1997 | } |
| 1998 | |
| 1999 | |
| 2000 | /** |
| 2001 | * mini_cm_reject - reject and teardown a connection |
| 2002 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 2003 | static int mini_cm_reject(struct nes_cm_core *cm_core, |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2004 | struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2005 | { |
| 2006 | int ret = 0; |
Faisal Latif | 183ecfa | 2008-11-21 20:50:46 -0600 | [diff] [blame] | 2007 | int passive_state; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2008 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2009 | nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n", |
| 2010 | __func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2011 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2012 | if (cm_node->tcp_cntxt.client) |
| 2013 | return ret; |
| 2014 | cleanup_retrans_entry(cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2015 | |
Faisal Latif | 183ecfa | 2008-11-21 20:50:46 -0600 | [diff] [blame] | 2016 | passive_state = atomic_add_return(1, &cm_node->passive_state); |
| 2017 | cm_node->state = NES_CM_STATE_CLOSED; |
| 2018 | if (passive_state == NES_SEND_RESET_EVENT) |
| 2019 | rem_ref_cm_node(cm_core, cm_node); |
| 2020 | else |
| 2021 | ret = send_reset(cm_node, NULL); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2022 | return ret; |
| 2023 | } |
| 2024 | |
| 2025 | |
| 2026 | /** |
| 2027 | * mini_cm_close |
| 2028 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 2029 | static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2030 | { |
| 2031 | int ret = 0; |
| 2032 | |
| 2033 | if (!cm_core || !cm_node) |
| 2034 | return -EINVAL; |
| 2035 | |
| 2036 | switch (cm_node->state) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2037 | case NES_CM_STATE_SYN_RCVD: |
| 2038 | case NES_CM_STATE_SYN_SENT: |
| 2039 | case NES_CM_STATE_ONE_SIDE_ESTABLISHED: |
| 2040 | case NES_CM_STATE_ESTABLISHED: |
| 2041 | case NES_CM_STATE_ACCEPTING: |
| 2042 | case NES_CM_STATE_MPAREQ_SENT: |
| 2043 | case NES_CM_STATE_MPAREQ_RCVD: |
| 2044 | cleanup_retrans_entry(cm_node); |
| 2045 | send_reset(cm_node, NULL); |
| 2046 | break; |
| 2047 | case NES_CM_STATE_CLOSE_WAIT: |
| 2048 | cm_node->state = NES_CM_STATE_LAST_ACK; |
| 2049 | send_fin(cm_node, NULL); |
| 2050 | break; |
| 2051 | case NES_CM_STATE_FIN_WAIT1: |
| 2052 | case NES_CM_STATE_FIN_WAIT2: |
| 2053 | case NES_CM_STATE_LAST_ACK: |
| 2054 | case NES_CM_STATE_TIME_WAIT: |
| 2055 | case NES_CM_STATE_CLOSING: |
| 2056 | ret = -1; |
| 2057 | break; |
| 2058 | case NES_CM_STATE_LISTENING: |
| 2059 | case NES_CM_STATE_UNKNOWN: |
| 2060 | case NES_CM_STATE_INITED: |
| 2061 | case NES_CM_STATE_CLOSED: |
| 2062 | ret = rem_ref_cm_node(cm_core, cm_node); |
| 2063 | break; |
| 2064 | case NES_CM_STATE_TSA: |
| 2065 | if (cm_node->send_entry) |
| 2066 | printk(KERN_ERR "ERROR Close got called from STATE_TSA " |
| 2067 | "send_entry=%p\n", cm_node->send_entry); |
| 2068 | ret = rem_ref_cm_node(cm_core, cm_node); |
| 2069 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2070 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2071 | return ret; |
| 2072 | } |
| 2073 | |
| 2074 | |
| 2075 | /** |
| 2076 | * recv_pkt - recv an ETHERNET packet, and process it through CM |
| 2077 | * node state machine |
| 2078 | */ |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 2079 | static int mini_cm_recv_pkt(struct nes_cm_core *cm_core, |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2080 | struct nes_vnic *nesvnic, struct sk_buff *skb) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2081 | { |
| 2082 | struct nes_cm_node *cm_node = NULL; |
| 2083 | struct nes_cm_listener *listener = NULL; |
| 2084 | struct iphdr *iph; |
| 2085 | struct tcphdr *tcph; |
| 2086 | struct nes_cm_info nfo; |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 2087 | int skb_handled = 1; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2088 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2089 | if (!skb) |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 2090 | return 0; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2091 | if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) { |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 2092 | return 0; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2093 | } |
| 2094 | |
| 2095 | iph = (struct iphdr *)skb->data; |
| 2096 | tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr)); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2097 | |
| 2098 | nfo.loc_addr = ntohl(iph->daddr); |
| 2099 | nfo.loc_port = ntohs(tcph->dest); |
| 2100 | nfo.rem_addr = ntohl(iph->saddr); |
| 2101 | nfo.rem_port = ntohs(tcph->source); |
| 2102 | |
Chien Tung | bc5698f | 2008-04-23 11:55:45 -0700 | [diff] [blame] | 2103 | nes_debug(NES_DBG_CM, "Received packet: dest=" NIPQUAD_FMT |
| 2104 | ":0x%04X src=" NIPQUAD_FMT ":0x%04X\n", |
| 2105 | NIPQUAD(iph->daddr), tcph->dest, |
| 2106 | NIPQUAD(iph->saddr), tcph->source); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2107 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2108 | do { |
| 2109 | cm_node = find_node(cm_core, |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2110 | nfo.rem_port, nfo.rem_addr, |
| 2111 | nfo.loc_port, nfo.loc_addr); |
| 2112 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2113 | if (!cm_node) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2114 | /* Only type of packet accepted are for */ |
| 2115 | /* the PASSIVE open (syn only) */ |
| 2116 | if ((!tcph->syn) || (tcph->ack)) { |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 2117 | skb_handled = 0; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2118 | break; |
| 2119 | } |
| 2120 | listener = find_listener(cm_core, nfo.loc_addr, |
| 2121 | nfo.loc_port, |
| 2122 | NES_CM_LISTENER_ACTIVE_STATE); |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 2123 | if (!listener) { |
| 2124 | nfo.cm_id = NULL; |
| 2125 | nfo.conn_type = 0; |
| 2126 | nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n"); |
| 2127 | skb_handled = 0; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2128 | break; |
| 2129 | } |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 2130 | nfo.cm_id = listener->cm_id; |
| 2131 | nfo.conn_type = listener->conn_type; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2132 | cm_node = make_cm_node(cm_core, nesvnic, &nfo, |
| 2133 | listener); |
| 2134 | if (!cm_node) { |
| 2135 | nes_debug(NES_DBG_CM, "Unable to allocate " |
| 2136 | "node\n"); |
| 2137 | cm_packets_dropped++; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2138 | atomic_dec(&listener->ref_count); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2139 | dev_kfree_skb_any(skb); |
| 2140 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2141 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2142 | if (!tcph->rst && !tcph->fin) { |
| 2143 | cm_node->state = NES_CM_STATE_LISTENING; |
| 2144 | } else { |
| 2145 | cm_packets_dropped++; |
| 2146 | rem_ref_cm_node(cm_core, cm_node); |
| 2147 | dev_kfree_skb_any(skb); |
| 2148 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2149 | } |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2150 | add_ref_cm_node(cm_node); |
| 2151 | } else if (cm_node->state == NES_CM_STATE_TSA) { |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2152 | rem_ref_cm_node(cm_core, cm_node); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2153 | atomic_inc(&cm_accel_dropped_pkts); |
| 2154 | dev_kfree_skb_any(skb); |
| 2155 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2156 | } |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 2157 | skb_reset_network_header(skb); |
| 2158 | skb_set_transport_header(skb, sizeof(*tcph)); |
| 2159 | skb->len = ntohs(iph->tot_len); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2160 | process_packet(cm_node, skb, cm_core); |
| 2161 | rem_ref_cm_node(cm_core, cm_node); |
| 2162 | } while (0); |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 2163 | return skb_handled; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2164 | } |
| 2165 | |
| 2166 | |
| 2167 | /** |
| 2168 | * nes_cm_alloc_core - allocate a top level instance of a cm core |
| 2169 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 2170 | static struct nes_cm_core *nes_cm_alloc_core(void) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2171 | { |
| 2172 | int i; |
| 2173 | |
| 2174 | struct nes_cm_core *cm_core; |
| 2175 | struct sk_buff *skb = NULL; |
| 2176 | |
| 2177 | /* setup the CM core */ |
| 2178 | /* alloc top level core control structure */ |
| 2179 | cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL); |
| 2180 | if (!cm_core) |
| 2181 | return NULL; |
| 2182 | |
| 2183 | INIT_LIST_HEAD(&cm_core->connected_nodes); |
| 2184 | init_timer(&cm_core->tcp_timer); |
| 2185 | cm_core->tcp_timer.function = nes_cm_timer_tick; |
| 2186 | |
| 2187 | cm_core->mtu = NES_CM_DEFAULT_MTU; |
| 2188 | cm_core->state = NES_CM_STATE_INITED; |
| 2189 | cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS; |
| 2190 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2191 | atomic_set(&cm_core->events_posted, 0); |
| 2192 | |
| 2193 | /* init the packet lists */ |
| 2194 | skb_queue_head_init(&cm_core->tx_free_list); |
| 2195 | |
| 2196 | for (i = 0; i < NES_CM_DEFAULT_FRAME_CNT; i++) { |
| 2197 | skb = dev_alloc_skb(cm_core->mtu); |
| 2198 | if (!skb) { |
| 2199 | kfree(cm_core); |
| 2200 | return NULL; |
| 2201 | } |
| 2202 | /* add 'raw' skb to free frame list */ |
| 2203 | skb_queue_head(&cm_core->tx_free_list, skb); |
| 2204 | } |
| 2205 | |
| 2206 | cm_core->api = &nes_cm_api; |
| 2207 | |
| 2208 | spin_lock_init(&cm_core->ht_lock); |
| 2209 | spin_lock_init(&cm_core->listen_list_lock); |
| 2210 | |
| 2211 | INIT_LIST_HEAD(&cm_core->listen_list.list); |
| 2212 | |
| 2213 | nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core); |
| 2214 | |
| 2215 | nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n"); |
| 2216 | cm_core->event_wq = create_singlethread_workqueue("nesewq"); |
| 2217 | cm_core->post_event = nes_cm_post_event; |
| 2218 | nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n"); |
| 2219 | cm_core->disconn_wq = create_singlethread_workqueue("nesdwq"); |
| 2220 | |
| 2221 | print_core(cm_core); |
| 2222 | return cm_core; |
| 2223 | } |
| 2224 | |
| 2225 | |
| 2226 | /** |
| 2227 | * mini_cm_dealloc_core - deallocate a top level instance of a cm core |
| 2228 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 2229 | static int mini_cm_dealloc_core(struct nes_cm_core *cm_core) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2230 | { |
| 2231 | nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core); |
| 2232 | |
| 2233 | if (!cm_core) |
| 2234 | return -EINVAL; |
| 2235 | |
| 2236 | barrier(); |
| 2237 | |
| 2238 | if (timer_pending(&cm_core->tcp_timer)) { |
| 2239 | del_timer(&cm_core->tcp_timer); |
| 2240 | } |
| 2241 | |
| 2242 | destroy_workqueue(cm_core->event_wq); |
| 2243 | destroy_workqueue(cm_core->disconn_wq); |
| 2244 | nes_debug(NES_DBG_CM, "\n"); |
| 2245 | kfree(cm_core); |
| 2246 | |
| 2247 | return 0; |
| 2248 | } |
| 2249 | |
| 2250 | |
| 2251 | /** |
| 2252 | * mini_cm_get |
| 2253 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 2254 | static int mini_cm_get(struct nes_cm_core *cm_core) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2255 | { |
| 2256 | return cm_core->state; |
| 2257 | } |
| 2258 | |
| 2259 | |
| 2260 | /** |
| 2261 | * mini_cm_set |
| 2262 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 2263 | static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2264 | { |
| 2265 | int ret = 0; |
| 2266 | |
| 2267 | switch (type) { |
| 2268 | case NES_CM_SET_PKT_SIZE: |
| 2269 | cm_core->mtu = value; |
| 2270 | break; |
| 2271 | case NES_CM_SET_FREE_PKT_Q_SIZE: |
| 2272 | cm_core->free_tx_pkt_max = value; |
| 2273 | break; |
| 2274 | default: |
| 2275 | /* unknown set option */ |
| 2276 | ret = -EINVAL; |
| 2277 | } |
| 2278 | |
| 2279 | return ret; |
| 2280 | } |
| 2281 | |
| 2282 | |
| 2283 | /** |
| 2284 | * nes_cm_init_tsa_conn setup HW; MPA frames must be |
| 2285 | * successfully exchanged when this is called |
| 2286 | */ |
| 2287 | static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node) |
| 2288 | { |
| 2289 | int ret = 0; |
| 2290 | |
| 2291 | if (!nesqp) |
| 2292 | return -EINVAL; |
| 2293 | |
| 2294 | nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 | |
| 2295 | NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG | |
| 2296 | NES_QPCONTEXT_MISC_DROS); |
| 2297 | |
| 2298 | if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale) |
| 2299 | nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE); |
| 2300 | |
| 2301 | nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT); |
| 2302 | |
| 2303 | nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16); |
| 2304 | |
| 2305 | nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32( |
| 2306 | (u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT); |
| 2307 | |
| 2308 | nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32( |
| 2309 | (cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) & |
| 2310 | NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK); |
| 2311 | |
| 2312 | nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32( |
| 2313 | (cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) & |
| 2314 | NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK); |
| 2315 | |
| 2316 | nesqp->nesqp_context->keepalive = cpu_to_le32(0x80); |
| 2317 | nesqp->nesqp_context->ts_recent = 0; |
| 2318 | nesqp->nesqp_context->ts_age = 0; |
| 2319 | nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
| 2320 | nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd); |
| 2321 | nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); |
| 2322 | nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd << |
| 2323 | cm_node->tcp_cntxt.rcv_wscale); |
| 2324 | nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
| 2325 | nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
| 2326 | nesqp->nesqp_context->srtt = 0; |
| 2327 | nesqp->nesqp_context->rttvar = cpu_to_le32(0x6); |
| 2328 | nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000); |
| 2329 | nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss); |
| 2330 | nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); |
| 2331 | nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); |
| 2332 | nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd); |
| 2333 | |
| 2334 | nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X," |
| 2335 | " Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n", |
| 2336 | nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt), |
| 2337 | le32_to_cpu(nesqp->nesqp_context->snd_nxt), |
| 2338 | cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale), |
| 2339 | le32_to_cpu(nesqp->nesqp_context->rcv_wnd), |
| 2340 | le32_to_cpu(nesqp->nesqp_context->misc)); |
| 2341 | nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd)); |
| 2342 | nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd)); |
| 2343 | nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd)); |
| 2344 | |
| 2345 | nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n"); |
| 2346 | cm_node->state = NES_CM_STATE_TSA; |
| 2347 | |
| 2348 | return ret; |
| 2349 | } |
| 2350 | |
| 2351 | |
| 2352 | /** |
| 2353 | * nes_cm_disconn |
| 2354 | */ |
| 2355 | int nes_cm_disconn(struct nes_qp *nesqp) |
| 2356 | { |
| 2357 | unsigned long flags; |
| 2358 | |
| 2359 | spin_lock_irqsave(&nesqp->lock, flags); |
| 2360 | if (nesqp->disconn_pending == 0) { |
| 2361 | nesqp->disconn_pending++; |
| 2362 | spin_unlock_irqrestore(&nesqp->lock, flags); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2363 | /* init our disconnect work element, to */ |
| 2364 | INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker); |
| 2365 | |
| 2366 | queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2367 | } else |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2368 | spin_unlock_irqrestore(&nesqp->lock, flags); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2369 | |
| 2370 | return 0; |
| 2371 | } |
| 2372 | |
| 2373 | |
| 2374 | /** |
| 2375 | * nes_disconnect_worker |
| 2376 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 2377 | static void nes_disconnect_worker(struct work_struct *work) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2378 | { |
| 2379 | struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work); |
| 2380 | |
| 2381 | nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n", |
| 2382 | nesqp->last_aeq, nesqp->hwqp.qp_id); |
| 2383 | nes_cm_disconn_true(nesqp); |
| 2384 | } |
| 2385 | |
| 2386 | |
| 2387 | /** |
| 2388 | * nes_cm_disconn_true |
| 2389 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 2390 | static int nes_cm_disconn_true(struct nes_qp *nesqp) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2391 | { |
| 2392 | unsigned long flags; |
| 2393 | int ret = 0; |
| 2394 | struct iw_cm_id *cm_id; |
| 2395 | struct iw_cm_event cm_event; |
| 2396 | struct nes_vnic *nesvnic; |
| 2397 | u16 last_ae; |
| 2398 | u8 original_hw_tcp_state; |
| 2399 | u8 original_ibqp_state; |
| 2400 | u8 issued_disconnect_reset = 0; |
| 2401 | |
| 2402 | if (!nesqp) { |
| 2403 | nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n"); |
| 2404 | return -1; |
| 2405 | } |
| 2406 | |
| 2407 | spin_lock_irqsave(&nesqp->lock, flags); |
| 2408 | cm_id = nesqp->cm_id; |
| 2409 | /* make sure we havent already closed this connection */ |
| 2410 | if (!cm_id) { |
| 2411 | nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n", |
| 2412 | nesqp->hwqp.qp_id); |
| 2413 | spin_unlock_irqrestore(&nesqp->lock, flags); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2414 | return -1; |
| 2415 | } |
| 2416 | |
| 2417 | nesvnic = to_nesvnic(nesqp->ibqp.device); |
| 2418 | nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id); |
| 2419 | |
| 2420 | original_hw_tcp_state = nesqp->hw_tcp_state; |
| 2421 | original_ibqp_state = nesqp->ibqp_state; |
| 2422 | last_ae = nesqp->last_aeq; |
| 2423 | |
| 2424 | |
| 2425 | nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state); |
| 2426 | |
| 2427 | if ((nesqp->cm_id) && (cm_id->event_handler)) { |
| 2428 | if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) || |
| 2429 | ((original_ibqp_state == IB_QPS_RTS) && |
| 2430 | (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) { |
| 2431 | atomic_inc(&cm_disconnects); |
| 2432 | cm_event.event = IW_CM_EVENT_DISCONNECT; |
| 2433 | if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) { |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2434 | cm_event.status = IW_CM_EVENT_STATUS_RESET; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2435 | nes_debug(NES_DBG_CM, "Generating a CM " |
| 2436 | "Disconnect Event (status reset) for " |
| 2437 | "QP%u, cm_id = %p. \n", |
| 2438 | nesqp->hwqp.qp_id, cm_id); |
| 2439 | } else |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2440 | cm_event.status = IW_CM_EVENT_STATUS_OK; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2441 | |
| 2442 | cm_event.local_addr = cm_id->local_addr; |
| 2443 | cm_event.remote_addr = cm_id->remote_addr; |
| 2444 | cm_event.private_data = NULL; |
| 2445 | cm_event.private_data_len = 0; |
| 2446 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2447 | nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event" |
| 2448 | " for QP%u, SQ Head = %u, SQ Tail = %u. " |
| 2449 | "cm_id = %p, refcount = %u.\n", |
| 2450 | nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, |
| 2451 | nesqp->hwqp.sq_tail, cm_id, |
| 2452 | atomic_read(&nesqp->refcount)); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2453 | |
| 2454 | spin_unlock_irqrestore(&nesqp->lock, flags); |
| 2455 | ret = cm_id->event_handler(cm_id, &cm_event); |
| 2456 | if (ret) |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2457 | nes_debug(NES_DBG_CM, "OFA CM event_handler " |
| 2458 | "returned, ret=%d\n", ret); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2459 | spin_lock_irqsave(&nesqp->lock, flags); |
| 2460 | } |
| 2461 | |
| 2462 | nesqp->disconn_pending = 0; |
| 2463 | /* There might have been another AE while the lock was released */ |
| 2464 | original_hw_tcp_state = nesqp->hw_tcp_state; |
| 2465 | original_ibqp_state = nesqp->ibqp_state; |
| 2466 | last_ae = nesqp->last_aeq; |
| 2467 | |
| 2468 | if ((issued_disconnect_reset == 0) && (nesqp->cm_id) && |
| 2469 | ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) || |
| 2470 | (original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) || |
| 2471 | (last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) || |
| 2472 | (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) { |
| 2473 | atomic_inc(&cm_closes); |
| 2474 | nesqp->cm_id = NULL; |
| 2475 | nesqp->in_disconnect = 0; |
| 2476 | spin_unlock_irqrestore(&nesqp->lock, flags); |
| 2477 | nes_disconnect(nesqp, 1); |
| 2478 | |
| 2479 | cm_id->provider_data = nesqp; |
| 2480 | /* Send up the close complete event */ |
| 2481 | cm_event.event = IW_CM_EVENT_CLOSE; |
| 2482 | cm_event.status = IW_CM_EVENT_STATUS_OK; |
| 2483 | cm_event.provider_data = cm_id->provider_data; |
| 2484 | cm_event.local_addr = cm_id->local_addr; |
| 2485 | cm_event.remote_addr = cm_id->remote_addr; |
| 2486 | cm_event.private_data = NULL; |
| 2487 | cm_event.private_data_len = 0; |
| 2488 | |
| 2489 | ret = cm_id->event_handler(cm_id, &cm_event); |
| 2490 | if (ret) { |
| 2491 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); |
| 2492 | } |
| 2493 | |
| 2494 | cm_id->rem_ref(cm_id); |
| 2495 | |
| 2496 | spin_lock_irqsave(&nesqp->lock, flags); |
| 2497 | if (nesqp->flush_issued == 0) { |
| 2498 | nesqp->flush_issued = 1; |
| 2499 | spin_unlock_irqrestore(&nesqp->lock, flags); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2500 | flush_wqes(nesvnic->nesdev, nesqp, |
| 2501 | NES_CQP_FLUSH_RQ, 1); |
| 2502 | } else |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2503 | spin_unlock_irqrestore(&nesqp->lock, flags); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2504 | } else { |
| 2505 | cm_id = nesqp->cm_id; |
| 2506 | spin_unlock_irqrestore(&nesqp->lock, flags); |
| 2507 | /* check to see if the inbound reset beat the outbound reset */ |
| 2508 | if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2509 | nes_debug(NES_DBG_CM, "QP%u: Decing refcount " |
| 2510 | "due to inbound reset beating the " |
| 2511 | "outbound reset.\n", nesqp->hwqp.qp_id); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2512 | } |
| 2513 | } |
| 2514 | } else { |
| 2515 | nesqp->disconn_pending = 0; |
| 2516 | spin_unlock_irqrestore(&nesqp->lock, flags); |
| 2517 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2518 | |
| 2519 | return 0; |
| 2520 | } |
| 2521 | |
| 2522 | |
| 2523 | /** |
| 2524 | * nes_disconnect |
| 2525 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 2526 | static int nes_disconnect(struct nes_qp *nesqp, int abrupt) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2527 | { |
| 2528 | int ret = 0; |
| 2529 | struct nes_vnic *nesvnic; |
| 2530 | struct nes_device *nesdev; |
| 2531 | |
| 2532 | nesvnic = to_nesvnic(nesqp->ibqp.device); |
| 2533 | if (!nesvnic) |
| 2534 | return -EINVAL; |
| 2535 | |
| 2536 | nesdev = nesvnic->nesdev; |
| 2537 | |
| 2538 | nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n", |
| 2539 | atomic_read(&nesvnic->netdev->refcnt)); |
| 2540 | |
| 2541 | if (nesqp->active_conn) { |
| 2542 | |
| 2543 | /* indicate this connection is NOT active */ |
| 2544 | nesqp->active_conn = 0; |
| 2545 | } else { |
| 2546 | /* Need to free the Last Streaming Mode Message */ |
| 2547 | if (nesqp->ietf_frame) { |
| 2548 | pci_free_consistent(nesdev->pcidev, |
| 2549 | nesqp->private_data_len+sizeof(struct ietf_mpa_frame), |
| 2550 | nesqp->ietf_frame, nesqp->ietf_frame_pbase); |
| 2551 | } |
| 2552 | } |
| 2553 | |
| 2554 | /* close the CM node down if it is still active */ |
| 2555 | if (nesqp->cm_node) { |
| 2556 | nes_debug(NES_DBG_CM, "Call close API\n"); |
| 2557 | |
| 2558 | g_cm_core->api->close(g_cm_core, nesqp->cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2559 | } |
| 2560 | |
| 2561 | return ret; |
| 2562 | } |
| 2563 | |
| 2564 | |
| 2565 | /** |
| 2566 | * nes_accept |
| 2567 | */ |
| 2568 | int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
| 2569 | { |
| 2570 | u64 u64temp; |
| 2571 | struct ib_qp *ibqp; |
| 2572 | struct nes_qp *nesqp; |
| 2573 | struct nes_vnic *nesvnic; |
| 2574 | struct nes_device *nesdev; |
| 2575 | struct nes_cm_node *cm_node; |
| 2576 | struct nes_adapter *adapter; |
| 2577 | struct ib_qp_attr attr; |
| 2578 | struct iw_cm_event cm_event; |
| 2579 | struct nes_hw_qp_wqe *wqe; |
| 2580 | struct nes_v4_quad nes_quad; |
Faisal Latif | 30da7cf | 2008-02-21 08:31:22 -0600 | [diff] [blame] | 2581 | u32 crc_value; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2582 | int ret; |
Faisal Latif | 183ecfa | 2008-11-21 20:50:46 -0600 | [diff] [blame] | 2583 | int passive_state; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2584 | |
| 2585 | ibqp = nes_get_qp(cm_id->device, conn_param->qpn); |
| 2586 | if (!ibqp) |
| 2587 | return -EINVAL; |
| 2588 | |
| 2589 | /* get all our handles */ |
| 2590 | nesqp = to_nesqp(ibqp); |
| 2591 | nesvnic = to_nesvnic(nesqp->ibqp.device); |
| 2592 | nesdev = nesvnic->nesdev; |
| 2593 | adapter = nesdev->nesadapter; |
| 2594 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2595 | cm_node = (struct nes_cm_node *)cm_id->provider_data; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2596 | nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p," |
| 2597 | "%s\n", cm_node, nesvnic, nesvnic->netdev, |
| 2598 | nesvnic->netdev->name); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2599 | |
| 2600 | /* associate the node with the QP */ |
| 2601 | nesqp->cm_node = (void *)cm_node; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2602 | cm_node->nesqp = nesqp; |
| 2603 | nes_add_ref(&nesqp->ibqp); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2604 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2605 | nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n", |
| 2606 | nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2607 | atomic_inc(&cm_accepts); |
| 2608 | |
| 2609 | nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n", |
| 2610 | atomic_read(&nesvnic->netdev->refcnt)); |
| 2611 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2612 | /* allocate the ietf frame and space for private data */ |
| 2613 | nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev, |
| 2614 | sizeof(struct ietf_mpa_frame) + conn_param->private_data_len, |
| 2615 | &nesqp->ietf_frame_pbase); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2616 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2617 | if (!nesqp->ietf_frame) { |
| 2618 | nes_debug(NES_DBG_CM, "Unable to allocate memory for private " |
| 2619 | "data\n"); |
| 2620 | return -ENOMEM; |
| 2621 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2622 | |
| 2623 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2624 | /* setup the MPA frame */ |
| 2625 | nesqp->private_data_len = conn_param->private_data_len; |
| 2626 | memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2627 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2628 | memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data, |
| 2629 | conn_param->private_data_len); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2630 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2631 | nesqp->ietf_frame->priv_data_len = |
| 2632 | cpu_to_be16(conn_param->private_data_len); |
| 2633 | nesqp->ietf_frame->rev = mpa_version; |
| 2634 | nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2635 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2636 | /* setup our first outgoing iWarp send WQE (the IETF frame response) */ |
| 2637 | wqe = &nesqp->hwqp.sq_vbase[0]; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2638 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2639 | if (cm_id->remote_addr.sin_addr.s_addr != |
| 2640 | cm_id->local_addr.sin_addr.s_addr) { |
| 2641 | u64temp = (unsigned long)nesqp; |
| 2642 | u64temp |= NES_SW_CONTEXT_ALIGN>>1; |
| 2643 | set_wqe_64bit_value(wqe->wqe_words, |
| 2644 | NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, |
| 2645 | u64temp); |
| 2646 | wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = |
| 2647 | cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING | |
| 2648 | NES_IWARP_SQ_WQE_WRPDU); |
| 2649 | wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = |
| 2650 | cpu_to_le32(conn_param->private_data_len + |
| 2651 | sizeof(struct ietf_mpa_frame)); |
| 2652 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = |
| 2653 | cpu_to_le32((u32)nesqp->ietf_frame_pbase); |
| 2654 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = |
| 2655 | cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32)); |
| 2656 | wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = |
| 2657 | cpu_to_le32(conn_param->private_data_len + |
| 2658 | sizeof(struct ietf_mpa_frame)); |
| 2659 | wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2660 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2661 | nesqp->nesqp_context->ird_ord_sizes |= |
| 2662 | cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | |
| 2663 | NES_QPCONTEXT_ORDIRD_WRPDU); |
| 2664 | } else { |
| 2665 | nesqp->nesqp_context->ird_ord_sizes |= |
| 2666 | cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | |
| 2667 | NES_QPCONTEXT_ORDIRD_WRPDU | |
| 2668 | NES_QPCONTEXT_ORDIRD_ALSMM)); |
| 2669 | } |
| 2670 | nesqp->skip_lsmm = 1; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2671 | |
| 2672 | |
| 2673 | /* Cache the cm_id in the qp */ |
| 2674 | nesqp->cm_id = cm_id; |
| 2675 | cm_node->cm_id = cm_id; |
| 2676 | |
| 2677 | /* nesqp->cm_node = (void *)cm_id->provider_data; */ |
| 2678 | cm_id->provider_data = nesqp; |
| 2679 | nesqp->active_conn = 0; |
| 2680 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2681 | if (cm_node->state == NES_CM_STATE_TSA) |
| 2682 | nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n", |
| 2683 | cm_node); |
| 2684 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2685 | nes_cm_init_tsa_conn(nesqp, cm_node); |
| 2686 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2687 | nesqp->nesqp_context->tcpPorts[0] = |
| 2688 | cpu_to_le16(ntohs(cm_id->local_addr.sin_port)); |
| 2689 | nesqp->nesqp_context->tcpPorts[1] = |
| 2690 | cpu_to_le16(ntohs(cm_id->remote_addr.sin_port)); |
| 2691 | |
| 2692 | if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr)) |
| 2693 | nesqp->nesqp_context->ip0 = |
| 2694 | cpu_to_le32(ntohl(nesvnic->local_ipaddr)); |
| 2695 | else |
| 2696 | nesqp->nesqp_context->ip0 = |
| 2697 | cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr)); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2698 | |
| 2699 | nesqp->nesqp_context->misc2 |= cpu_to_le32( |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2700 | (u32)PCI_FUNC(nesdev->pcidev->devfn) << |
| 2701 | NES_QPCONTEXT_MISC2_SRC_IP_SHIFT); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2702 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2703 | nesqp->nesqp_context->arp_index_vlan |= |
| 2704 | cpu_to_le32(nes_arp_table(nesdev, |
| 2705 | le32_to_cpu(nesqp->nesqp_context->ip0), NULL, |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2706 | NES_ARP_RESOLVE) << 16); |
| 2707 | |
| 2708 | nesqp->nesqp_context->ts_val_delta = cpu_to_le32( |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2709 | jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW)); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2710 | |
| 2711 | nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id); |
| 2712 | |
| 2713 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32( |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2714 | ((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT)); |
| 2715 | nesqp->nesqp_context->ird_ord_sizes |= |
| 2716 | cpu_to_le32((u32)conn_param->ord); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2717 | |
| 2718 | memset(&nes_quad, 0, sizeof(nes_quad)); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2719 | nes_quad.DstIpAdrIndex = |
| 2720 | cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); |
| 2721 | if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr)) |
| 2722 | nes_quad.SrcIpadr = nesvnic->local_ipaddr; |
| 2723 | else |
| 2724 | nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr; |
| 2725 | nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port; |
| 2726 | nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2727 | |
| 2728 | /* Produce hash key */ |
Faisal Latif | 30da7cf | 2008-02-21 08:31:22 -0600 | [diff] [blame] | 2729 | crc_value = get_crc_value(&nes_quad); |
| 2730 | nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2731 | nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n", |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2732 | nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2733 | |
| 2734 | nesqp->hte_index &= adapter->hte_index_mask; |
| 2735 | nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index); |
| 2736 | |
| 2737 | cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node); |
| 2738 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2739 | nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = " |
| 2740 | "0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + " |
| 2741 | "private data length=%zu.\n", nesqp->hwqp.qp_id, |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2742 | ntohl(cm_id->remote_addr.sin_addr.s_addr), |
| 2743 | ntohs(cm_id->remote_addr.sin_port), |
| 2744 | ntohl(cm_id->local_addr.sin_addr.s_addr), |
| 2745 | ntohs(cm_id->local_addr.sin_port), |
| 2746 | le32_to_cpu(nesqp->nesqp_context->rcv_nxt), |
| 2747 | le32_to_cpu(nesqp->nesqp_context->snd_nxt), |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2748 | conn_param->private_data_len + |
| 2749 | sizeof(struct ietf_mpa_frame)); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2750 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2751 | |
| 2752 | /* notify OF layer that accept event was successfull */ |
| 2753 | cm_id->add_ref(cm_id); |
| 2754 | |
| 2755 | cm_event.event = IW_CM_EVENT_ESTABLISHED; |
| 2756 | cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED; |
| 2757 | cm_event.provider_data = (void *)nesqp; |
| 2758 | cm_event.local_addr = cm_id->local_addr; |
| 2759 | cm_event.remote_addr = cm_id->remote_addr; |
| 2760 | cm_event.private_data = NULL; |
| 2761 | cm_event.private_data_len = 0; |
| 2762 | ret = cm_id->event_handler(cm_id, &cm_event); |
Faisal Latif | 183ecfa | 2008-11-21 20:50:46 -0600 | [diff] [blame] | 2763 | attr.qp_state = IB_QPS_RTS; |
| 2764 | nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2765 | if (cm_node->loopbackpartner) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2766 | cm_node->loopbackpartner->mpa_frame_size = |
| 2767 | nesqp->private_data_len; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2768 | /* copy entire MPA frame to our cm_node's frame */ |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2769 | memcpy(cm_node->loopbackpartner->mpa_frame_buf, |
| 2770 | nesqp->ietf_frame->priv_data, nesqp->private_data_len); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2771 | create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED); |
| 2772 | } |
| 2773 | if (ret) |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2774 | printk(KERN_ERR "%s[%u] OFA CM event_handler returned, " |
| 2775 | "ret=%d\n", __func__, __LINE__, ret); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2776 | |
Faisal Latif | 183ecfa | 2008-11-21 20:50:46 -0600 | [diff] [blame] | 2777 | passive_state = atomic_add_return(1, &cm_node->passive_state); |
| 2778 | if (passive_state == NES_SEND_RESET_EVENT) |
| 2779 | create_event(cm_node, NES_CM_EVENT_RESET); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2780 | return 0; |
| 2781 | } |
| 2782 | |
| 2783 | |
| 2784 | /** |
| 2785 | * nes_reject |
| 2786 | */ |
| 2787 | int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) |
| 2788 | { |
| 2789 | struct nes_cm_node *cm_node; |
| 2790 | struct nes_cm_core *cm_core; |
| 2791 | |
| 2792 | atomic_inc(&cm_rejects); |
| 2793 | cm_node = (struct nes_cm_node *) cm_id->provider_data; |
| 2794 | cm_core = cm_node->cm_core; |
| 2795 | cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len; |
| 2796 | |
| 2797 | strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP); |
| 2798 | memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len); |
| 2799 | |
| 2800 | cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len); |
| 2801 | cm_node->mpa_frame.rev = mpa_version; |
| 2802 | cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT; |
| 2803 | |
| 2804 | cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node); |
| 2805 | |
| 2806 | return 0; |
| 2807 | } |
| 2808 | |
| 2809 | |
| 2810 | /** |
| 2811 | * nes_connect |
| 2812 | * setup and launch cm connect node |
| 2813 | */ |
| 2814 | int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
| 2815 | { |
| 2816 | struct ib_qp *ibqp; |
| 2817 | struct nes_qp *nesqp; |
| 2818 | struct nes_vnic *nesvnic; |
| 2819 | struct nes_device *nesdev; |
| 2820 | struct nes_cm_node *cm_node; |
| 2821 | struct nes_cm_info cm_info; |
| 2822 | |
| 2823 | ibqp = nes_get_qp(cm_id->device, conn_param->qpn); |
| 2824 | if (!ibqp) |
| 2825 | return -EINVAL; |
| 2826 | nesqp = to_nesqp(ibqp); |
| 2827 | if (!nesqp) |
| 2828 | return -EINVAL; |
| 2829 | nesvnic = to_nesvnic(nesqp->ibqp.device); |
| 2830 | if (!nesvnic) |
| 2831 | return -EINVAL; |
| 2832 | nesdev = nesvnic->nesdev; |
| 2833 | if (!nesdev) |
| 2834 | return -EINVAL; |
| 2835 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2836 | nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = " |
| 2837 | "0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id, |
| 2838 | ntohl(nesvnic->local_ipaddr), |
| 2839 | ntohl(cm_id->remote_addr.sin_addr.s_addr), |
| 2840 | ntohs(cm_id->remote_addr.sin_port), |
| 2841 | ntohl(cm_id->local_addr.sin_addr.s_addr), |
| 2842 | ntohs(cm_id->local_addr.sin_port)); |
| 2843 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2844 | atomic_inc(&cm_connects); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2845 | nesqp->active_conn = 1; |
| 2846 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2847 | /* cache the cm_id in the qp */ |
| 2848 | nesqp->cm_id = cm_id; |
| 2849 | |
| 2850 | cm_id->provider_data = nesqp; |
| 2851 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2852 | nesqp->private_data_len = conn_param->private_data_len; |
| 2853 | nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord); |
| 2854 | nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2855 | nes_debug(NES_DBG_CM, "mpa private data len =%u\n", |
| 2856 | conn_param->private_data_len); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2857 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2858 | if (cm_id->local_addr.sin_addr.s_addr != |
| 2859 | cm_id->remote_addr.sin_addr.s_addr) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2860 | nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port), |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2861 | PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2862 | |
| 2863 | /* set up the connection params for the node */ |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2864 | cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr); |
| 2865 | cm_info.loc_port = htons(cm_id->local_addr.sin_port); |
| 2866 | cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr); |
| 2867 | cm_info.rem_port = htons(cm_id->remote_addr.sin_port); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2868 | cm_info.cm_id = cm_id; |
| 2869 | cm_info.conn_type = NES_CM_IWARP_CONN_TYPE; |
| 2870 | |
| 2871 | cm_id->add_ref(cm_id); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2872 | |
| 2873 | /* create a connect CM node connection */ |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2874 | cm_node = g_cm_core->api->connect(g_cm_core, nesvnic, |
| 2875 | conn_param->private_data_len, (void *)conn_param->private_data, |
| 2876 | &cm_info); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2877 | if (!cm_node) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2878 | if (cm_id->local_addr.sin_addr.s_addr != |
| 2879 | cm_id->remote_addr.sin_addr.s_addr) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2880 | nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port), |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2881 | PCI_FUNC(nesdev->pcidev->devfn), |
| 2882 | NES_MANAGE_APBVT_DEL); |
| 2883 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2884 | cm_id->rem_ref(cm_id); |
| 2885 | return -ENOMEM; |
| 2886 | } |
| 2887 | |
| 2888 | cm_node->apbvt_set = 1; |
| 2889 | nesqp->cm_node = cm_node; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2890 | cm_node->nesqp = nesqp; |
Faisal Latif | d7ffd50 | 2008-09-16 11:56:26 -0700 | [diff] [blame] | 2891 | nes_add_ref(&nesqp->ibqp); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2892 | |
| 2893 | return 0; |
| 2894 | } |
| 2895 | |
| 2896 | |
| 2897 | /** |
| 2898 | * nes_create_listen |
| 2899 | */ |
| 2900 | int nes_create_listen(struct iw_cm_id *cm_id, int backlog) |
| 2901 | { |
| 2902 | struct nes_vnic *nesvnic; |
| 2903 | struct nes_cm_listener *cm_node; |
| 2904 | struct nes_cm_info cm_info; |
| 2905 | struct nes_adapter *adapter; |
| 2906 | int err; |
| 2907 | |
| 2908 | |
| 2909 | nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n", |
| 2910 | cm_id, ntohs(cm_id->local_addr.sin_port)); |
| 2911 | |
| 2912 | nesvnic = to_nesvnic(cm_id->device); |
| 2913 | if (!nesvnic) |
| 2914 | return -EINVAL; |
| 2915 | adapter = nesvnic->nesdev->nesadapter; |
| 2916 | nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n", |
| 2917 | nesvnic, nesvnic->netdev, nesvnic->netdev->name); |
| 2918 | |
| 2919 | nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n", |
| 2920 | nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr); |
| 2921 | |
| 2922 | /* setup listen params in our api call struct */ |
| 2923 | cm_info.loc_addr = nesvnic->local_ipaddr; |
| 2924 | cm_info.loc_port = cm_id->local_addr.sin_port; |
| 2925 | cm_info.backlog = backlog; |
| 2926 | cm_info.cm_id = cm_id; |
| 2927 | |
| 2928 | cm_info.conn_type = NES_CM_IWARP_CONN_TYPE; |
| 2929 | |
| 2930 | |
| 2931 | cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info); |
| 2932 | if (!cm_node) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2933 | printk(KERN_ERR "%s[%u] Error returned from listen API call\n", |
Harvey Harrison | 3371836 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 2934 | __func__, __LINE__); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2935 | return -ENOMEM; |
| 2936 | } |
| 2937 | |
| 2938 | cm_id->provider_data = cm_node; |
| 2939 | |
| 2940 | if (!cm_node->reused_node) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2941 | err = nes_manage_apbvt(nesvnic, |
| 2942 | ntohs(cm_id->local_addr.sin_port), |
| 2943 | PCI_FUNC(nesvnic->nesdev->pcidev->devfn), |
| 2944 | NES_MANAGE_APBVT_ADD); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2945 | if (err) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 2946 | printk(KERN_ERR "nes_manage_apbvt call returned %d.\n", |
| 2947 | err); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2948 | g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node); |
| 2949 | return err; |
| 2950 | } |
| 2951 | cm_listens_created++; |
| 2952 | } |
| 2953 | |
| 2954 | cm_id->add_ref(cm_id); |
| 2955 | cm_id->provider_data = (void *)cm_node; |
| 2956 | |
| 2957 | |
| 2958 | return 0; |
| 2959 | } |
| 2960 | |
| 2961 | |
| 2962 | /** |
| 2963 | * nes_destroy_listen |
| 2964 | */ |
| 2965 | int nes_destroy_listen(struct iw_cm_id *cm_id) |
| 2966 | { |
| 2967 | if (cm_id->provider_data) |
| 2968 | g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data); |
| 2969 | else |
| 2970 | nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n"); |
| 2971 | |
| 2972 | cm_id->rem_ref(cm_id); |
| 2973 | |
| 2974 | return 0; |
| 2975 | } |
| 2976 | |
| 2977 | |
| 2978 | /** |
| 2979 | * nes_cm_recv |
| 2980 | */ |
| 2981 | int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice) |
| 2982 | { |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 2983 | int rc = 0; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2984 | cm_packets_received++; |
| 2985 | if ((g_cm_core) && (g_cm_core->api)) { |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 2986 | rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2987 | } else { |
| 2988 | nes_debug(NES_DBG_CM, "Unable to process packet for CM," |
| 2989 | " cm is not setup properly.\n"); |
| 2990 | } |
| 2991 | |
Faisal Latif | 4a14f6a | 2008-11-21 20:50:49 -0600 | [diff] [blame^] | 2992 | return rc; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 2993 | } |
| 2994 | |
| 2995 | |
| 2996 | /** |
| 2997 | * nes_cm_start |
| 2998 | * Start and init a cm core module |
| 2999 | */ |
| 3000 | int nes_cm_start(void) |
| 3001 | { |
| 3002 | nes_debug(NES_DBG_CM, "\n"); |
| 3003 | /* create the primary CM core, pass this handle to subsequent core inits */ |
| 3004 | g_cm_core = nes_cm_alloc_core(); |
| 3005 | if (g_cm_core) { |
| 3006 | return 0; |
| 3007 | } else { |
| 3008 | return -ENOMEM; |
| 3009 | } |
| 3010 | } |
| 3011 | |
| 3012 | |
| 3013 | /** |
| 3014 | * nes_cm_stop |
| 3015 | * stop and dealloc all cm core instances |
| 3016 | */ |
| 3017 | int nes_cm_stop(void) |
| 3018 | { |
| 3019 | g_cm_core->api->destroy_cm_core(g_cm_core); |
| 3020 | return 0; |
| 3021 | } |
| 3022 | |
| 3023 | |
| 3024 | /** |
| 3025 | * cm_event_connected |
| 3026 | * handle a connected event, setup QPs and HW |
| 3027 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 3028 | static void cm_event_connected(struct nes_cm_event *event) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3029 | { |
| 3030 | u64 u64temp; |
| 3031 | struct nes_qp *nesqp; |
| 3032 | struct nes_vnic *nesvnic; |
| 3033 | struct nes_device *nesdev; |
| 3034 | struct nes_cm_node *cm_node; |
| 3035 | struct nes_adapter *nesadapter; |
| 3036 | struct ib_qp_attr attr; |
| 3037 | struct iw_cm_id *cm_id; |
| 3038 | struct iw_cm_event cm_event; |
| 3039 | struct nes_hw_qp_wqe *wqe; |
| 3040 | struct nes_v4_quad nes_quad; |
Faisal Latif | 30da7cf | 2008-02-21 08:31:22 -0600 | [diff] [blame] | 3041 | u32 crc_value; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3042 | int ret; |
| 3043 | |
| 3044 | /* get all our handles */ |
| 3045 | cm_node = event->cm_node; |
| 3046 | cm_id = cm_node->cm_id; |
| 3047 | nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id); |
| 3048 | nesqp = (struct nes_qp *)cm_id->provider_data; |
| 3049 | nesvnic = to_nesvnic(nesqp->ibqp.device); |
| 3050 | nesdev = nesvnic->nesdev; |
| 3051 | nesadapter = nesdev->nesadapter; |
| 3052 | |
| 3053 | if (nesqp->destroyed) { |
| 3054 | return; |
| 3055 | } |
| 3056 | atomic_inc(&cm_connecteds); |
| 3057 | nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on" |
| 3058 | " local port 0x%04X. jiffies = %lu.\n", |
| 3059 | nesqp->hwqp.qp_id, |
| 3060 | ntohl(cm_id->remote_addr.sin_addr.s_addr), |
| 3061 | ntohs(cm_id->remote_addr.sin_port), |
| 3062 | ntohs(cm_id->local_addr.sin_port), |
| 3063 | jiffies); |
| 3064 | |
| 3065 | nes_cm_init_tsa_conn(nesqp, cm_node); |
| 3066 | |
| 3067 | /* set the QP tsa context */ |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3068 | nesqp->nesqp_context->tcpPorts[0] = |
| 3069 | cpu_to_le16(ntohs(cm_id->local_addr.sin_port)); |
| 3070 | nesqp->nesqp_context->tcpPorts[1] = |
| 3071 | cpu_to_le16(ntohs(cm_id->remote_addr.sin_port)); |
| 3072 | if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr)) |
| 3073 | nesqp->nesqp_context->ip0 = |
| 3074 | cpu_to_le32(ntohl(nesvnic->local_ipaddr)); |
| 3075 | else |
| 3076 | nesqp->nesqp_context->ip0 = |
| 3077 | cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr)); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3078 | |
| 3079 | nesqp->nesqp_context->misc2 |= cpu_to_le32( |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3080 | (u32)PCI_FUNC(nesdev->pcidev->devfn) << |
| 3081 | NES_QPCONTEXT_MISC2_SRC_IP_SHIFT); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3082 | nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32( |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3083 | nes_arp_table(nesdev, |
| 3084 | le32_to_cpu(nesqp->nesqp_context->ip0), |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3085 | NULL, NES_ARP_RESOLVE) << 16); |
| 3086 | nesqp->nesqp_context->ts_val_delta = cpu_to_le32( |
| 3087 | jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW)); |
| 3088 | nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id); |
| 3089 | nesqp->nesqp_context->ird_ord_sizes |= |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3090 | cpu_to_le32((u32)1 << |
| 3091 | NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3092 | |
| 3093 | /* Adjust tail for not having a LSMM */ |
| 3094 | nesqp->hwqp.sq_tail = 1; |
| 3095 | |
| 3096 | #if defined(NES_SEND_FIRST_WRITE) |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3097 | if (cm_node->send_write0) { |
| 3098 | nes_debug(NES_DBG_CM, "Sending first write.\n"); |
| 3099 | wqe = &nesqp->hwqp.sq_vbase[0]; |
| 3100 | u64temp = (unsigned long)nesqp; |
| 3101 | u64temp |= NES_SW_CONTEXT_ALIGN>>1; |
| 3102 | set_wqe_64bit_value(wqe->wqe_words, |
| 3103 | NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp); |
| 3104 | wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = |
| 3105 | cpu_to_le32(NES_IWARP_SQ_OP_RDMAW); |
| 3106 | wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0; |
| 3107 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0; |
| 3108 | wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0; |
| 3109 | wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0; |
| 3110 | wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3111 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3112 | /* use the reserved spot on the WQ for the extra first WQE */ |
| 3113 | nesqp->nesqp_context->ird_ord_sizes &= |
| 3114 | cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT | |
| 3115 | NES_QPCONTEXT_ORDIRD_WRPDU | |
| 3116 | NES_QPCONTEXT_ORDIRD_ALSMM)); |
| 3117 | nesqp->skip_lsmm = 1; |
| 3118 | nesqp->hwqp.sq_tail = 0; |
| 3119 | nes_write32(nesdev->regs + NES_WQE_ALLOC, |
| 3120 | (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id); |
| 3121 | } |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3122 | #endif |
| 3123 | |
| 3124 | memset(&nes_quad, 0, sizeof(nes_quad)); |
| 3125 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3126 | nes_quad.DstIpAdrIndex = |
| 3127 | cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); |
| 3128 | if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr)) |
| 3129 | nes_quad.SrcIpadr = nesvnic->local_ipaddr; |
| 3130 | else |
| 3131 | nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3132 | nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port; |
| 3133 | nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port; |
| 3134 | |
| 3135 | /* Produce hash key */ |
Faisal Latif | 30da7cf | 2008-02-21 08:31:22 -0600 | [diff] [blame] | 3136 | crc_value = get_crc_value(&nes_quad); |
| 3137 | nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3138 | nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n", |
| 3139 | nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask); |
| 3140 | |
| 3141 | nesqp->hte_index &= nesadapter->hte_index_mask; |
| 3142 | nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index); |
| 3143 | |
| 3144 | nesqp->ietf_frame = &cm_node->mpa_frame; |
| 3145 | nesqp->private_data_len = (u8) cm_node->mpa_frame_size; |
| 3146 | cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node); |
| 3147 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3148 | /* notify OF layer we successfully created the requested connection */ |
| 3149 | cm_event.event = IW_CM_EVENT_CONNECT_REPLY; |
| 3150 | cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED; |
| 3151 | cm_event.provider_data = cm_id->provider_data; |
| 3152 | cm_event.local_addr.sin_family = AF_INET; |
| 3153 | cm_event.local_addr.sin_port = cm_id->local_addr.sin_port; |
| 3154 | cm_event.remote_addr = cm_id->remote_addr; |
| 3155 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3156 | cm_event.private_data = (void *)event->cm_node->mpa_frame_buf; |
| 3157 | cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3158 | |
| 3159 | cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr; |
| 3160 | ret = cm_id->event_handler(cm_id, &cm_event); |
| 3161 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); |
| 3162 | |
| 3163 | if (ret) |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3164 | printk(KERN_ERR "%s[%u] OFA CM event_handler returned, " |
| 3165 | "ret=%d\n", __func__, __LINE__, ret); |
| 3166 | attr.qp_state = IB_QPS_RTS; |
| 3167 | nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3168 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3169 | nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = " |
| 3170 | "%lu\n", nesqp->hwqp.qp_id, jiffies); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3171 | |
| 3172 | return; |
| 3173 | } |
| 3174 | |
| 3175 | |
| 3176 | /** |
| 3177 | * cm_event_connect_error |
| 3178 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 3179 | static void cm_event_connect_error(struct nes_cm_event *event) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3180 | { |
| 3181 | struct nes_qp *nesqp; |
| 3182 | struct iw_cm_id *cm_id; |
| 3183 | struct iw_cm_event cm_event; |
| 3184 | /* struct nes_cm_info cm_info; */ |
| 3185 | int ret; |
| 3186 | |
| 3187 | if (!event->cm_node) |
| 3188 | return; |
| 3189 | |
| 3190 | cm_id = event->cm_node->cm_id; |
| 3191 | if (!cm_id) { |
| 3192 | return; |
| 3193 | } |
| 3194 | |
| 3195 | nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id); |
| 3196 | nesqp = cm_id->provider_data; |
| 3197 | |
| 3198 | if (!nesqp) { |
| 3199 | return; |
| 3200 | } |
| 3201 | |
| 3202 | /* notify OF layer about this connection error event */ |
| 3203 | /* cm_id->rem_ref(cm_id); */ |
| 3204 | nesqp->cm_id = NULL; |
| 3205 | cm_id->provider_data = NULL; |
| 3206 | cm_event.event = IW_CM_EVENT_CONNECT_REPLY; |
| 3207 | cm_event.status = IW_CM_EVENT_STATUS_REJECTED; |
| 3208 | cm_event.provider_data = cm_id->provider_data; |
| 3209 | cm_event.local_addr = cm_id->local_addr; |
| 3210 | cm_event.remote_addr = cm_id->remote_addr; |
| 3211 | cm_event.private_data = NULL; |
| 3212 | cm_event.private_data_len = 0; |
| 3213 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3214 | nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, " |
| 3215 | "remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr, |
| 3216 | cm_event.remote_addr.sin_addr.s_addr); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3217 | |
| 3218 | ret = cm_id->event_handler(cm_id, &cm_event); |
| 3219 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); |
| 3220 | if (ret) |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3221 | printk(KERN_ERR "%s[%u] OFA CM event_handler returned, " |
| 3222 | "ret=%d\n", __func__, __LINE__, ret); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3223 | cm_id->rem_ref(cm_id); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3224 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3225 | rem_ref_cm_node(event->cm_node->cm_core, event->cm_node); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3226 | return; |
| 3227 | } |
| 3228 | |
| 3229 | |
| 3230 | /** |
| 3231 | * cm_event_reset |
| 3232 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 3233 | static void cm_event_reset(struct nes_cm_event *event) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3234 | { |
| 3235 | struct nes_qp *nesqp; |
| 3236 | struct iw_cm_id *cm_id; |
| 3237 | struct iw_cm_event cm_event; |
| 3238 | /* struct nes_cm_info cm_info; */ |
| 3239 | int ret; |
| 3240 | |
| 3241 | if (!event->cm_node) |
| 3242 | return; |
| 3243 | |
| 3244 | if (!event->cm_node->cm_id) |
| 3245 | return; |
| 3246 | |
| 3247 | cm_id = event->cm_node->cm_id; |
| 3248 | |
| 3249 | nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id); |
| 3250 | nesqp = cm_id->provider_data; |
| 3251 | |
| 3252 | nesqp->cm_id = NULL; |
| 3253 | /* cm_id->provider_data = NULL; */ |
| 3254 | cm_event.event = IW_CM_EVENT_DISCONNECT; |
| 3255 | cm_event.status = IW_CM_EVENT_STATUS_RESET; |
| 3256 | cm_event.provider_data = cm_id->provider_data; |
| 3257 | cm_event.local_addr = cm_id->local_addr; |
| 3258 | cm_event.remote_addr = cm_id->remote_addr; |
| 3259 | cm_event.private_data = NULL; |
| 3260 | cm_event.private_data_len = 0; |
| 3261 | |
| 3262 | ret = cm_id->event_handler(cm_id, &cm_event); |
Faisal Latif | 183ecfa | 2008-11-21 20:50:46 -0600 | [diff] [blame] | 3263 | cm_id->add_ref(cm_id); |
| 3264 | atomic_inc(&cm_closes); |
| 3265 | cm_event.event = IW_CM_EVENT_CLOSE; |
| 3266 | cm_event.status = IW_CM_EVENT_STATUS_OK; |
| 3267 | cm_event.provider_data = cm_id->provider_data; |
| 3268 | cm_event.local_addr = cm_id->local_addr; |
| 3269 | cm_event.remote_addr = cm_id->remote_addr; |
| 3270 | cm_event.private_data = NULL; |
| 3271 | cm_event.private_data_len = 0; |
| 3272 | nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node); |
| 3273 | ret = cm_id->event_handler(cm_id, &cm_event); |
| 3274 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3275 | nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret); |
| 3276 | |
| 3277 | |
| 3278 | /* notify OF layer about this connection error event */ |
| 3279 | cm_id->rem_ref(cm_id); |
| 3280 | |
| 3281 | return; |
| 3282 | } |
| 3283 | |
| 3284 | |
| 3285 | /** |
| 3286 | * cm_event_mpa_req |
| 3287 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 3288 | static void cm_event_mpa_req(struct nes_cm_event *event) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3289 | { |
| 3290 | struct iw_cm_id *cm_id; |
| 3291 | struct iw_cm_event cm_event; |
| 3292 | int ret; |
| 3293 | struct nes_cm_node *cm_node; |
| 3294 | |
| 3295 | cm_node = event->cm_node; |
| 3296 | if (!cm_node) |
| 3297 | return; |
| 3298 | cm_id = cm_node->cm_id; |
| 3299 | |
| 3300 | atomic_inc(&cm_connect_reqs); |
| 3301 | nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n", |
| 3302 | cm_node, cm_id, jiffies); |
| 3303 | |
| 3304 | cm_event.event = IW_CM_EVENT_CONNECT_REQUEST; |
| 3305 | cm_event.status = IW_CM_EVENT_STATUS_OK; |
| 3306 | cm_event.provider_data = (void *)cm_node; |
| 3307 | |
| 3308 | cm_event.local_addr.sin_family = AF_INET; |
| 3309 | cm_event.local_addr.sin_port = htons(event->cm_info.loc_port); |
| 3310 | cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr); |
| 3311 | |
| 3312 | cm_event.remote_addr.sin_family = AF_INET; |
| 3313 | cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port); |
| 3314 | cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr); |
| 3315 | |
| 3316 | cm_event.private_data = cm_node->mpa_frame_buf; |
| 3317 | cm_event.private_data_len = (u8) cm_node->mpa_frame_size; |
| 3318 | |
| 3319 | ret = cm_id->event_handler(cm_id, &cm_event); |
| 3320 | if (ret) |
| 3321 | printk("%s[%u] OFA CM event_handler returned, ret=%d\n", |
Harvey Harrison | 3371836 | 2008-04-16 21:01:10 -0700 | [diff] [blame] | 3322 | __func__, __LINE__, ret); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3323 | |
| 3324 | return; |
| 3325 | } |
| 3326 | |
| 3327 | |
| 3328 | static void nes_cm_event_handler(struct work_struct *); |
| 3329 | |
| 3330 | /** |
| 3331 | * nes_cm_post_event |
| 3332 | * post an event to the cm event handler |
| 3333 | */ |
Roland Dreier | 1a855fb | 2008-04-16 21:01:09 -0700 | [diff] [blame] | 3334 | static int nes_cm_post_event(struct nes_cm_event *event) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3335 | { |
| 3336 | atomic_inc(&event->cm_node->cm_core->events_posted); |
| 3337 | add_ref_cm_node(event->cm_node); |
| 3338 | event->cm_info.cm_id->add_ref(event->cm_info.cm_id); |
| 3339 | INIT_WORK(&event->event_work, nes_cm_event_handler); |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3340 | nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n", |
| 3341 | event->cm_node, event); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3342 | |
| 3343 | queue_work(event->cm_node->cm_core->event_wq, &event->event_work); |
| 3344 | |
| 3345 | nes_debug(NES_DBG_CM, "Exit\n"); |
| 3346 | return 0; |
| 3347 | } |
| 3348 | |
| 3349 | |
| 3350 | /** |
| 3351 | * nes_cm_event_handler |
| 3352 | * worker function to handle cm events |
| 3353 | * will free instance of nes_cm_event |
| 3354 | */ |
| 3355 | static void nes_cm_event_handler(struct work_struct *work) |
| 3356 | { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3357 | struct nes_cm_event *event = container_of(work, struct nes_cm_event, |
| 3358 | event_work); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3359 | struct nes_cm_core *cm_core; |
| 3360 | |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3361 | if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core)) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3362 | return; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3363 | |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3364 | cm_core = event->cm_node->cm_core; |
| 3365 | nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n", |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3366 | event, event->type, atomic_read(&cm_core->events_posted)); |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3367 | |
| 3368 | switch (event->type) { |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3369 | case NES_CM_EVENT_MPA_REQ: |
| 3370 | cm_event_mpa_req(event); |
| 3371 | nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n", |
| 3372 | event->cm_node); |
| 3373 | break; |
| 3374 | case NES_CM_EVENT_RESET: |
| 3375 | nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n", |
| 3376 | event->cm_node); |
| 3377 | cm_event_reset(event); |
| 3378 | break; |
| 3379 | case NES_CM_EVENT_CONNECTED: |
| 3380 | if ((!event->cm_node->cm_id) || |
| 3381 | (event->cm_node->state != NES_CM_STATE_TSA)) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3382 | break; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3383 | cm_event_connected(event); |
| 3384 | nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n"); |
| 3385 | break; |
| 3386 | case NES_CM_EVENT_ABORTED: |
| 3387 | if ((!event->cm_node->cm_id) || |
| 3388 | (event->cm_node->state == NES_CM_STATE_TSA)) |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3389 | break; |
Faisal Latif | 6492cdf | 2008-07-24 20:50:45 -0700 | [diff] [blame] | 3390 | cm_event_connect_error(event); |
| 3391 | nes_debug(NES_DBG_CM, "CM Event: ABORTED\n"); |
| 3392 | break; |
| 3393 | case NES_CM_EVENT_DROPPED_PKT: |
| 3394 | nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n"); |
| 3395 | break; |
| 3396 | default: |
| 3397 | nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n"); |
| 3398 | break; |
Glenn Streiff | 3c2d774 | 2008-02-04 20:20:45 -0800 | [diff] [blame] | 3399 | } |
| 3400 | |
| 3401 | atomic_dec(&cm_core->events_posted); |
| 3402 | event->cm_info.cm_id->rem_ref(event->cm_info.cm_id); |
| 3403 | rem_ref_cm_node(cm_core, event->cm_node); |
| 3404 | kfree(event); |
| 3405 | |
| 3406 | return; |
| 3407 | } |