3370 lines
94 KiB
C
3370 lines
94 KiB
C
/*
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* Copyright (c) 2006 - 2008 NetEffect, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#define TCPOPT_TIMESTAMP 8
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#include <asm/atomic.h>
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#include <linux/skbuff.h>
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#include <linux/ip.h>
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#include <linux/tcp.h>
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#include <linux/init.h>
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#include <linux/if_arp.h>
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#include <linux/if_vlan.h>
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#include <linux/notifier.h>
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#include <linux/net.h>
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#include <linux/types.h>
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#include <linux/timer.h>
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#include <linux/time.h>
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#include <linux/delay.h>
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#include <linux/etherdevice.h>
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#include <linux/netdevice.h>
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#include <linux/random.h>
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#include <linux/list.h>
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#include <linux/threads.h>
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#include <net/arp.h>
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#include <net/neighbour.h>
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#include <net/route.h>
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#include <net/ip_fib.h>
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#include "nes.h"
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u32 cm_packets_sent;
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u32 cm_packets_bounced;
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u32 cm_packets_dropped;
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u32 cm_packets_retrans;
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u32 cm_packets_created;
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u32 cm_packets_received;
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u32 cm_listens_created;
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u32 cm_listens_destroyed;
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u32 cm_backlog_drops;
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atomic_t cm_loopbacks;
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atomic_t cm_nodes_created;
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atomic_t cm_nodes_destroyed;
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atomic_t cm_accel_dropped_pkts;
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atomic_t cm_resets_recvd;
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static inline int mini_cm_accelerated(struct nes_cm_core *,
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struct nes_cm_node *);
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static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *,
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struct nes_vnic *, struct nes_cm_info *);
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static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *);
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static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *,
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struct nes_vnic *, u16, void *, struct nes_cm_info *);
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static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *);
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static int mini_cm_accept(struct nes_cm_core *, struct ietf_mpa_frame *,
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struct nes_cm_node *);
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static int mini_cm_reject(struct nes_cm_core *, struct ietf_mpa_frame *,
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struct nes_cm_node *);
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static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *,
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struct sk_buff *);
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static int mini_cm_dealloc_core(struct nes_cm_core *);
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static int mini_cm_get(struct nes_cm_core *);
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static int mini_cm_set(struct nes_cm_core *, u32, u32);
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static void form_cm_frame(struct sk_buff *, struct nes_cm_node *,
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void *, u32, void *, u32, u8);
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static int add_ref_cm_node(struct nes_cm_node *);
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static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *);
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static int nes_cm_disconn_true(struct nes_qp *);
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static int nes_cm_post_event(struct nes_cm_event *event);
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static int nes_disconnect(struct nes_qp *nesqp, int abrupt);
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static void nes_disconnect_worker(struct work_struct *work);
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static int send_mpa_request(struct nes_cm_node *, struct sk_buff *);
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static int send_syn(struct nes_cm_node *, u32, struct sk_buff *);
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static int send_reset(struct nes_cm_node *, struct sk_buff *);
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static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb);
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static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb);
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static void process_packet(struct nes_cm_node *, struct sk_buff *,
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struct nes_cm_core *);
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static void active_open_err(struct nes_cm_node *, struct sk_buff *, int);
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static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int);
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static void cleanup_retrans_entry(struct nes_cm_node *);
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static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *,
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enum nes_cm_event_type);
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static void free_retrans_entry(struct nes_cm_node *cm_node);
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static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
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struct sk_buff *skb, int optionsize, int passive);
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/* CM event handler functions */
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static void cm_event_connected(struct nes_cm_event *);
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static void cm_event_connect_error(struct nes_cm_event *);
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static void cm_event_reset(struct nes_cm_event *);
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static void cm_event_mpa_req(struct nes_cm_event *);
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static void print_core(struct nes_cm_core *core);
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/* External CM API Interface */
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/* instance of function pointers for client API */
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/* set address of this instance to cm_core->cm_ops at cm_core alloc */
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static struct nes_cm_ops nes_cm_api = {
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mini_cm_accelerated,
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mini_cm_listen,
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mini_cm_del_listen,
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mini_cm_connect,
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mini_cm_close,
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mini_cm_accept,
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mini_cm_reject,
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mini_cm_recv_pkt,
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mini_cm_dealloc_core,
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mini_cm_get,
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mini_cm_set
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};
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static struct nes_cm_core *g_cm_core;
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atomic_t cm_connects;
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atomic_t cm_accepts;
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atomic_t cm_disconnects;
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atomic_t cm_closes;
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atomic_t cm_connecteds;
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atomic_t cm_connect_reqs;
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atomic_t cm_rejects;
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/**
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* create_event
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*/
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static struct nes_cm_event *create_event(struct nes_cm_node *cm_node,
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enum nes_cm_event_type type)
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{
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struct nes_cm_event *event;
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if (!cm_node->cm_id)
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return NULL;
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/* allocate an empty event */
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event = kzalloc(sizeof(*event), GFP_ATOMIC);
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if (!event)
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return NULL;
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event->type = type;
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event->cm_node = cm_node;
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event->cm_info.rem_addr = cm_node->rem_addr;
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event->cm_info.loc_addr = cm_node->loc_addr;
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event->cm_info.rem_port = cm_node->rem_port;
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event->cm_info.loc_port = cm_node->loc_port;
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event->cm_info.cm_id = cm_node->cm_id;
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nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, "
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"dst_addr=%08x[%x], src_addr=%08x[%x]\n",
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cm_node, event, type, event->cm_info.loc_addr,
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event->cm_info.loc_port, event->cm_info.rem_addr,
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event->cm_info.rem_port);
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nes_cm_post_event(event);
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return event;
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}
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/**
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* send_mpa_request
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*/
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static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb)
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{
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int ret;
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if (!skb) {
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nes_debug(NES_DBG_CM, "skb set to NULL\n");
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return -1;
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}
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/* send an MPA Request frame */
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form_cm_frame(skb, cm_node, NULL, 0, &cm_node->mpa_frame,
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cm_node->mpa_frame_size, SET_ACK);
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ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
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if (ret < 0)
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return ret;
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return 0;
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}
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/**
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* recv_mpa - process a received TCP pkt, we are expecting an
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* IETF MPA frame
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*/
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static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 len)
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{
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struct ietf_mpa_frame *mpa_frame;
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/* assume req frame is in tcp data payload */
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if (len < sizeof(struct ietf_mpa_frame)) {
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nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len);
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return -1;
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}
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mpa_frame = (struct ietf_mpa_frame *)buffer;
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cm_node->mpa_frame_size = ntohs(mpa_frame->priv_data_len);
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if (cm_node->mpa_frame_size + sizeof(struct ietf_mpa_frame) != len) {
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nes_debug(NES_DBG_CM, "The received ietf buffer was not right"
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" complete (%x + %x != %x)\n",
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cm_node->mpa_frame_size, (u32)sizeof(struct ietf_mpa_frame), len);
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return -1;
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}
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/* copy entire MPA frame to our cm_node's frame */
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memcpy(cm_node->mpa_frame_buf, buffer + sizeof(struct ietf_mpa_frame),
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cm_node->mpa_frame_size);
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return 0;
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}
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/**
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* form_cm_frame - get a free packet and build empty frame Use
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* node info to build.
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*/
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static void form_cm_frame(struct sk_buff *skb,
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struct nes_cm_node *cm_node, void *options, u32 optionsize,
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void *data, u32 datasize, u8 flags)
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{
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struct tcphdr *tcph;
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struct iphdr *iph;
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struct ethhdr *ethh;
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u8 *buf;
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u16 packetsize = sizeof(*iph);
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packetsize += sizeof(*tcph);
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packetsize += optionsize + datasize;
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memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));
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skb->len = 0;
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buf = skb_put(skb, packetsize + ETH_HLEN);
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ethh = (struct ethhdr *) buf;
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buf += ETH_HLEN;
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iph = (struct iphdr *)buf;
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buf += sizeof(*iph);
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tcph = (struct tcphdr *)buf;
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skb_reset_mac_header(skb);
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skb_set_network_header(skb, ETH_HLEN);
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skb_set_transport_header(skb, ETH_HLEN+sizeof(*iph));
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buf += sizeof(*tcph);
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skb->ip_summed = CHECKSUM_PARTIAL;
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skb->protocol = htons(0x800);
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skb->data_len = 0;
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skb->mac_len = ETH_HLEN;
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memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN);
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memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN);
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ethh->h_proto = htons(0x0800);
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iph->version = IPVERSION;
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iph->ihl = 5; /* 5 * 4Byte words, IP headr len */
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iph->tos = 0;
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iph->tot_len = htons(packetsize);
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iph->id = htons(++cm_node->tcp_cntxt.loc_id);
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iph->frag_off = htons(0x4000);
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iph->ttl = 0x40;
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iph->protocol = 0x06; /* IPPROTO_TCP */
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iph->saddr = htonl(cm_node->loc_addr);
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iph->daddr = htonl(cm_node->rem_addr);
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tcph->source = htons(cm_node->loc_port);
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tcph->dest = htons(cm_node->rem_port);
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tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);
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if (flags & SET_ACK) {
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cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt;
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tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);
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tcph->ack = 1;
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} else
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tcph->ack_seq = 0;
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if (flags & SET_SYN) {
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cm_node->tcp_cntxt.loc_seq_num++;
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tcph->syn = 1;
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} else
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cm_node->tcp_cntxt.loc_seq_num += datasize;
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if (flags & SET_FIN) {
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cm_node->tcp_cntxt.loc_seq_num++;
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tcph->fin = 1;
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}
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if (flags & SET_RST)
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tcph->rst = 1;
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tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);
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tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);
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tcph->urg_ptr = 0;
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if (optionsize)
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memcpy(buf, options, optionsize);
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buf += optionsize;
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if (datasize)
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memcpy(buf, data, datasize);
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skb_shinfo(skb)->nr_frags = 0;
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cm_packets_created++;
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}
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/**
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* print_core - dump a cm core
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*/
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static void print_core(struct nes_cm_core *core)
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{
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nes_debug(NES_DBG_CM, "---------------------------------------------\n");
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nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core);
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if (!core)
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return;
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nes_debug(NES_DBG_CM, "---------------------------------------------\n");
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nes_debug(NES_DBG_CM, "State : %u \n", core->state);
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nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt));
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nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt));
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nes_debug(NES_DBG_CM, "core : %p \n", core);
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nes_debug(NES_DBG_CM, "-------------- end core ---------------\n");
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}
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/**
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* schedule_nes_timer
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* note - cm_node needs to be protected before calling this. Encase in:
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* rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node);
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*/
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int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb,
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enum nes_timer_type type, int send_retrans,
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int close_when_complete)
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{
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unsigned long flags;
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struct nes_cm_core *cm_core = cm_node->cm_core;
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struct nes_timer_entry *new_send;
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int ret = 0;
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u32 was_timer_set;
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new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC);
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if (!new_send)
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return -1;
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/* new_send->timetosend = currenttime */
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new_send->retrycount = NES_DEFAULT_RETRYS;
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new_send->retranscount = NES_DEFAULT_RETRANS;
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new_send->skb = skb;
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new_send->timetosend = jiffies;
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new_send->type = type;
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new_send->netdev = cm_node->netdev;
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new_send->send_retrans = send_retrans;
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new_send->close_when_complete = close_when_complete;
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if (type == NES_TIMER_TYPE_CLOSE) {
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new_send->timetosend += (HZ/10);
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spin_lock_irqsave(&cm_node->recv_list_lock, flags);
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list_add_tail(&new_send->list, &cm_node->recv_list);
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spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
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}
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if (type == NES_TIMER_TYPE_SEND) {
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new_send->seq_num = ntohl(tcp_hdr(skb)->seq);
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atomic_inc(&new_send->skb->users);
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spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
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cm_node->send_entry = new_send;
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add_ref_cm_node(cm_node);
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spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
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new_send->timetosend = jiffies + NES_RETRY_TIMEOUT;
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ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev);
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if (ret != NETDEV_TX_OK) {
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nes_debug(NES_DBG_CM, "Error sending packet %p "
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"(jiffies = %lu)\n", new_send, jiffies);
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atomic_dec(&new_send->skb->users);
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new_send->timetosend = jiffies;
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} else {
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cm_packets_sent++;
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if (!send_retrans) {
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cleanup_retrans_entry(cm_node);
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if (close_when_complete)
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rem_ref_cm_node(cm_core, cm_node);
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return ret;
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}
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}
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}
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was_timer_set = timer_pending(&cm_core->tcp_timer);
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if (!was_timer_set) {
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cm_core->tcp_timer.expires = new_send->timetosend;
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add_timer(&cm_core->tcp_timer);
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}
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return ret;
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}
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/**
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* nes_cm_timer_tick
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*/
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static void nes_cm_timer_tick(unsigned long pass)
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{
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unsigned long flags, qplockflags;
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unsigned long nexttimeout = jiffies + NES_LONG_TIME;
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struct iw_cm_id *cm_id;
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struct nes_cm_node *cm_node;
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struct nes_timer_entry *send_entry, *recv_entry;
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struct list_head *list_core, *list_core_temp;
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struct list_head *list_node, *list_node_temp;
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struct nes_cm_core *cm_core = g_cm_core;
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struct nes_qp *nesqp;
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u32 settimer = 0;
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int ret = NETDEV_TX_OK;
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enum nes_cm_node_state last_state;
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struct list_head timer_list;
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INIT_LIST_HEAD(&timer_list);
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spin_lock_irqsave(&cm_core->ht_lock, flags);
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list_for_each_safe(list_node, list_core_temp,
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&cm_core->connected_nodes) {
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cm_node = container_of(list_node, struct nes_cm_node, list);
|
|
if (!list_empty(&cm_node->recv_list) || (cm_node->send_entry)) {
|
|
add_ref_cm_node(cm_node);
|
|
list_add(&cm_node->timer_entry, &timer_list);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
|
|
|
|
list_for_each_safe(list_node, list_core_temp, &timer_list) {
|
|
cm_node = container_of(list_node, struct nes_cm_node,
|
|
timer_entry);
|
|
spin_lock_irqsave(&cm_node->recv_list_lock, flags);
|
|
list_for_each_safe(list_core, list_node_temp,
|
|
&cm_node->recv_list) {
|
|
recv_entry = container_of(list_core,
|
|
struct nes_timer_entry, list);
|
|
if (!recv_entry)
|
|
break;
|
|
if (time_after(recv_entry->timetosend, jiffies)) {
|
|
if (nexttimeout > recv_entry->timetosend ||
|
|
!settimer) {
|
|
nexttimeout = recv_entry->timetosend;
|
|
settimer = 1;
|
|
}
|
|
continue;
|
|
}
|
|
list_del(&recv_entry->list);
|
|
cm_id = cm_node->cm_id;
|
|
spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
|
|
nesqp = (struct nes_qp *)recv_entry->skb;
|
|
spin_lock_irqsave(&nesqp->lock, qplockflags);
|
|
if (nesqp->cm_id) {
|
|
nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
|
|
"refcount = %d: HIT A "
|
|
"NES_TIMER_TYPE_CLOSE with something "
|
|
"to do!!!\n", nesqp->hwqp.qp_id, cm_id,
|
|
atomic_read(&nesqp->refcount));
|
|
nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
|
|
nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
|
|
nesqp->ibqp_state = IB_QPS_ERR;
|
|
spin_unlock_irqrestore(&nesqp->lock,
|
|
qplockflags);
|
|
nes_cm_disconn(nesqp);
|
|
} else {
|
|
spin_unlock_irqrestore(&nesqp->lock,
|
|
qplockflags);
|
|
nes_debug(NES_DBG_CM, "QP%u: cm_id = %p, "
|
|
"refcount = %d: HIT A "
|
|
"NES_TIMER_TYPE_CLOSE with nothing "
|
|
"to do!!!\n", nesqp->hwqp.qp_id, cm_id,
|
|
atomic_read(&nesqp->refcount));
|
|
}
|
|
if (cm_id)
|
|
cm_id->rem_ref(cm_id);
|
|
|
|
kfree(recv_entry);
|
|
spin_lock_irqsave(&cm_node->recv_list_lock, flags);
|
|
}
|
|
spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
|
|
|
|
spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
|
|
do {
|
|
send_entry = cm_node->send_entry;
|
|
if (!send_entry)
|
|
break;
|
|
if (time_after(send_entry->timetosend, jiffies)) {
|
|
if (cm_node->state != NES_CM_STATE_TSA) {
|
|
if ((nexttimeout >
|
|
send_entry->timetosend) ||
|
|
!settimer) {
|
|
nexttimeout =
|
|
send_entry->timetosend;
|
|
settimer = 1;
|
|
break;
|
|
}
|
|
} else {
|
|
free_retrans_entry(cm_node);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ((cm_node->state == NES_CM_STATE_TSA) ||
|
|
(cm_node->state == NES_CM_STATE_CLOSED)) {
|
|
free_retrans_entry(cm_node);
|
|
break;
|
|
}
|
|
|
|
if (!send_entry->retranscount ||
|
|
!send_entry->retrycount) {
|
|
cm_packets_dropped++;
|
|
last_state = cm_node->state;
|
|
cm_node->state = NES_CM_STATE_CLOSED;
|
|
free_retrans_entry(cm_node);
|
|
spin_unlock_irqrestore(
|
|
&cm_node->retrans_list_lock, flags);
|
|
if (last_state == NES_CM_STATE_SYN_RCVD)
|
|
rem_ref_cm_node(cm_core, cm_node);
|
|
else
|
|
create_event(cm_node,
|
|
NES_CM_EVENT_ABORTED);
|
|
spin_lock_irqsave(&cm_node->retrans_list_lock,
|
|
flags);
|
|
break;
|
|
}
|
|
atomic_inc(&send_entry->skb->users);
|
|
cm_packets_retrans++;
|
|
nes_debug(NES_DBG_CM, "Retransmitting send_entry %p "
|
|
"for node %p, jiffies = %lu, time to send = "
|
|
"%lu, retranscount = %u, send_entry->seq_num = "
|
|
"0x%08X, cm_node->tcp_cntxt.rem_ack_num = "
|
|
"0x%08X\n", send_entry, cm_node, jiffies,
|
|
send_entry->timetosend,
|
|
send_entry->retranscount,
|
|
send_entry->seq_num,
|
|
cm_node->tcp_cntxt.rem_ack_num);
|
|
|
|
spin_unlock_irqrestore(&cm_node->retrans_list_lock,
|
|
flags);
|
|
ret = nes_nic_cm_xmit(send_entry->skb, cm_node->netdev);
|
|
spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
|
|
if (ret != NETDEV_TX_OK) {
|
|
nes_debug(NES_DBG_CM, "rexmit failed for "
|
|
"node=%p\n", cm_node);
|
|
cm_packets_bounced++;
|
|
atomic_dec(&send_entry->skb->users);
|
|
send_entry->retrycount--;
|
|
nexttimeout = jiffies + NES_SHORT_TIME;
|
|
settimer = 1;
|
|
break;
|
|
} else {
|
|
cm_packets_sent++;
|
|
}
|
|
nes_debug(NES_DBG_CM, "Packet Sent: retrans count = "
|
|
"%u, retry count = %u.\n",
|
|
send_entry->retranscount,
|
|
send_entry->retrycount);
|
|
if (send_entry->send_retrans) {
|
|
send_entry->retranscount--;
|
|
send_entry->timetosend = jiffies +
|
|
NES_RETRY_TIMEOUT;
|
|
if (nexttimeout > send_entry->timetosend ||
|
|
!settimer) {
|
|
nexttimeout = send_entry->timetosend;
|
|
settimer = 1;
|
|
}
|
|
} else {
|
|
int close_when_complete;
|
|
close_when_complete =
|
|
send_entry->close_when_complete;
|
|
nes_debug(NES_DBG_CM, "cm_node=%p state=%d\n",
|
|
cm_node, cm_node->state);
|
|
free_retrans_entry(cm_node);
|
|
if (close_when_complete)
|
|
rem_ref_cm_node(cm_node->cm_core,
|
|
cm_node);
|
|
}
|
|
} while (0);
|
|
|
|
spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
|
|
rem_ref_cm_node(cm_node->cm_core, cm_node);
|
|
if (ret != NETDEV_TX_OK) {
|
|
nes_debug(NES_DBG_CM, "rexmit failed for cm_node=%p\n",
|
|
cm_node);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (settimer) {
|
|
if (!timer_pending(&cm_core->tcp_timer)) {
|
|
cm_core->tcp_timer.expires = nexttimeout;
|
|
add_timer(&cm_core->tcp_timer);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* send_syn
|
|
*/
|
|
static int send_syn(struct nes_cm_node *cm_node, u32 sendack,
|
|
struct sk_buff *skb)
|
|
{
|
|
int ret;
|
|
int flags = SET_SYN;
|
|
char optionsbuffer[sizeof(struct option_mss) +
|
|
sizeof(struct option_windowscale) + sizeof(struct option_base) +
|
|
TCP_OPTIONS_PADDING];
|
|
|
|
int optionssize = 0;
|
|
/* Sending MSS option */
|
|
union all_known_options *options;
|
|
|
|
if (!cm_node)
|
|
return -EINVAL;
|
|
|
|
options = (union all_known_options *)&optionsbuffer[optionssize];
|
|
options->as_mss.optionnum = OPTION_NUMBER_MSS;
|
|
options->as_mss.length = sizeof(struct option_mss);
|
|
options->as_mss.mss = htons(cm_node->tcp_cntxt.mss);
|
|
optionssize += sizeof(struct option_mss);
|
|
|
|
options = (union all_known_options *)&optionsbuffer[optionssize];
|
|
options->as_windowscale.optionnum = OPTION_NUMBER_WINDOW_SCALE;
|
|
options->as_windowscale.length = sizeof(struct option_windowscale);
|
|
options->as_windowscale.shiftcount = cm_node->tcp_cntxt.rcv_wscale;
|
|
optionssize += sizeof(struct option_windowscale);
|
|
|
|
if (sendack && !(NES_DRV_OPT_SUPRESS_OPTION_BC & nes_drv_opt)) {
|
|
options = (union all_known_options *)&optionsbuffer[optionssize];
|
|
options->as_base.optionnum = OPTION_NUMBER_WRITE0;
|
|
options->as_base.length = sizeof(struct option_base);
|
|
optionssize += sizeof(struct option_base);
|
|
/* we need the size to be a multiple of 4 */
|
|
options = (union all_known_options *)&optionsbuffer[optionssize];
|
|
options->as_end = 1;
|
|
optionssize += 1;
|
|
options = (union all_known_options *)&optionsbuffer[optionssize];
|
|
options->as_end = 1;
|
|
optionssize += 1;
|
|
}
|
|
|
|
options = (union all_known_options *)&optionsbuffer[optionssize];
|
|
options->as_end = OPTION_NUMBER_END;
|
|
optionssize += 1;
|
|
|
|
if (!skb)
|
|
skb = dev_alloc_skb(MAX_CM_BUFFER);
|
|
if (!skb) {
|
|
nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
|
|
return -1;
|
|
}
|
|
|
|
if (sendack)
|
|
flags |= SET_ACK;
|
|
|
|
form_cm_frame(skb, cm_node, optionsbuffer, optionssize, NULL, 0, flags);
|
|
ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* send_reset
|
|
*/
|
|
static int send_reset(struct nes_cm_node *cm_node, struct sk_buff *skb)
|
|
{
|
|
int ret;
|
|
int flags = SET_RST | SET_ACK;
|
|
|
|
if (!skb)
|
|
skb = dev_alloc_skb(MAX_CM_BUFFER);
|
|
if (!skb) {
|
|
nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
|
|
return -1;
|
|
}
|
|
|
|
form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, flags);
|
|
ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 1);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* send_ack
|
|
*/
|
|
static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb)
|
|
{
|
|
int ret;
|
|
|
|
if (!skb)
|
|
skb = dev_alloc_skb(MAX_CM_BUFFER);
|
|
|
|
if (!skb) {
|
|
nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
|
|
return -1;
|
|
}
|
|
|
|
form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK);
|
|
ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 0, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* send_fin
|
|
*/
|
|
static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb)
|
|
{
|
|
int ret;
|
|
|
|
/* if we didn't get a frame get one */
|
|
if (!skb)
|
|
skb = dev_alloc_skb(MAX_CM_BUFFER);
|
|
|
|
if (!skb) {
|
|
nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n");
|
|
return -1;
|
|
}
|
|
|
|
form_cm_frame(skb, cm_node, NULL, 0, NULL, 0, SET_ACK | SET_FIN);
|
|
ret = schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* find_node - find a cm node that matches the reference cm node
|
|
*/
|
|
static struct nes_cm_node *find_node(struct nes_cm_core *cm_core,
|
|
u16 rem_port, nes_addr_t rem_addr, u16 loc_port, nes_addr_t loc_addr)
|
|
{
|
|
unsigned long flags;
|
|
struct list_head *hte;
|
|
struct nes_cm_node *cm_node;
|
|
__be32 tmp_addr = cpu_to_be32(loc_addr);
|
|
|
|
/* get a handle on the hte */
|
|
hte = &cm_core->connected_nodes;
|
|
|
|
nes_debug(NES_DBG_CM, "Searching for an owner node: %pI4:%x from core %p->%p\n",
|
|
&tmp_addr, loc_port, cm_core, hte);
|
|
|
|
/* walk list and find cm_node associated with this session ID */
|
|
spin_lock_irqsave(&cm_core->ht_lock, flags);
|
|
list_for_each_entry(cm_node, hte, list) {
|
|
/* compare quad, return node handle if a match */
|
|
nes_debug(NES_DBG_CM, "finding node %x:%x =? %x:%x ^ %x:%x =? %x:%x\n",
|
|
cm_node->loc_addr, cm_node->loc_port,
|
|
loc_addr, loc_port,
|
|
cm_node->rem_addr, cm_node->rem_port,
|
|
rem_addr, rem_port);
|
|
if ((cm_node->loc_addr == loc_addr) && (cm_node->loc_port == loc_port) &&
|
|
(cm_node->rem_addr == rem_addr) && (cm_node->rem_port == rem_port)) {
|
|
add_ref_cm_node(cm_node);
|
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
|
|
return cm_node;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
|
|
|
|
/* no owner node */
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
* find_listener - find a cm node listening on this addr-port pair
|
|
*/
|
|
static struct nes_cm_listener *find_listener(struct nes_cm_core *cm_core,
|
|
nes_addr_t dst_addr, u16 dst_port, enum nes_cm_listener_state listener_state)
|
|
{
|
|
unsigned long flags;
|
|
struct nes_cm_listener *listen_node;
|
|
__be32 tmp_addr = cpu_to_be32(dst_addr);
|
|
|
|
/* walk list and find cm_node associated with this session ID */
|
|
spin_lock_irqsave(&cm_core->listen_list_lock, flags);
|
|
list_for_each_entry(listen_node, &cm_core->listen_list.list, list) {
|
|
/* compare node pair, return node handle if a match */
|
|
if (((listen_node->loc_addr == dst_addr) ||
|
|
listen_node->loc_addr == 0x00000000) &&
|
|
(listen_node->loc_port == dst_port) &&
|
|
(listener_state & listen_node->listener_state)) {
|
|
atomic_inc(&listen_node->ref_count);
|
|
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
|
|
return listen_node;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
|
|
|
|
nes_debug(NES_DBG_CM, "Unable to find listener for %pI4:%x\n",
|
|
&tmp_addr, dst_port);
|
|
|
|
/* no listener */
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
* add_hte_node - add a cm node to the hash table
|
|
*/
|
|
static int add_hte_node(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
|
|
{
|
|
unsigned long flags;
|
|
struct list_head *hte;
|
|
|
|
if (!cm_node || !cm_core)
|
|
return -EINVAL;
|
|
|
|
nes_debug(NES_DBG_CM, "Adding Node %p to Active Connection HT\n",
|
|
cm_node);
|
|
|
|
spin_lock_irqsave(&cm_core->ht_lock, flags);
|
|
|
|
/* get a handle on the hash table element (list head for this slot) */
|
|
hte = &cm_core->connected_nodes;
|
|
list_add_tail(&cm_node->list, hte);
|
|
atomic_inc(&cm_core->ht_node_cnt);
|
|
|
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* mini_cm_dec_refcnt_listen
|
|
*/
|
|
static int mini_cm_dec_refcnt_listen(struct nes_cm_core *cm_core,
|
|
struct nes_cm_listener *listener, int free_hanging_nodes)
|
|
{
|
|
int ret = 1;
|
|
unsigned long flags;
|
|
struct list_head *list_pos = NULL;
|
|
struct list_head *list_temp = NULL;
|
|
struct nes_cm_node *cm_node = NULL;
|
|
struct list_head reset_list;
|
|
|
|
nes_debug(NES_DBG_CM, "attempting listener= %p free_nodes= %d, "
|
|
"refcnt=%d\n", listener, free_hanging_nodes,
|
|
atomic_read(&listener->ref_count));
|
|
/* free non-accelerated child nodes for this listener */
|
|
INIT_LIST_HEAD(&reset_list);
|
|
if (free_hanging_nodes) {
|
|
spin_lock_irqsave(&cm_core->ht_lock, flags);
|
|
list_for_each_safe(list_pos, list_temp,
|
|
&g_cm_core->connected_nodes) {
|
|
cm_node = container_of(list_pos, struct nes_cm_node,
|
|
list);
|
|
if ((cm_node->listener == listener) &&
|
|
(!cm_node->accelerated)) {
|
|
add_ref_cm_node(cm_node);
|
|
list_add(&cm_node->reset_entry, &reset_list);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&cm_core->ht_lock, flags);
|
|
}
|
|
|
|
list_for_each_safe(list_pos, list_temp, &reset_list) {
|
|
cm_node = container_of(list_pos, struct nes_cm_node,
|
|
reset_entry);
|
|
cleanup_retrans_entry(cm_node);
|
|
send_reset(cm_node, NULL);
|
|
rem_ref_cm_node(cm_node->cm_core, cm_node);
|
|
}
|
|
|
|
spin_lock_irqsave(&cm_core->listen_list_lock, flags);
|
|
if (!atomic_dec_return(&listener->ref_count)) {
|
|
list_del(&listener->list);
|
|
|
|
/* decrement our listen node count */
|
|
atomic_dec(&cm_core->listen_node_cnt);
|
|
|
|
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
|
|
|
|
if (listener->nesvnic) {
|
|
nes_manage_apbvt(listener->nesvnic, listener->loc_port,
|
|
PCI_FUNC(listener->nesvnic->nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL);
|
|
}
|
|
|
|
nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener);
|
|
|
|
kfree(listener);
|
|
listener = NULL;
|
|
ret = 0;
|
|
cm_listens_destroyed++;
|
|
} else {
|
|
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
|
|
}
|
|
if (listener) {
|
|
if (atomic_read(&listener->pend_accepts_cnt) > 0)
|
|
nes_debug(NES_DBG_CM, "destroying listener (%p)"
|
|
" with non-zero pending accepts=%u\n",
|
|
listener, atomic_read(&listener->pend_accepts_cnt));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* mini_cm_del_listen
|
|
*/
|
|
static int mini_cm_del_listen(struct nes_cm_core *cm_core,
|
|
struct nes_cm_listener *listener)
|
|
{
|
|
listener->listener_state = NES_CM_LISTENER_PASSIVE_STATE;
|
|
listener->cm_id = NULL; /* going to be destroyed pretty soon */
|
|
return mini_cm_dec_refcnt_listen(cm_core, listener, 1);
|
|
}
|
|
|
|
|
|
/**
|
|
* mini_cm_accelerated
|
|
*/
|
|
static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
|
|
struct nes_cm_node *cm_node)
|
|
{
|
|
u32 was_timer_set;
|
|
cm_node->accelerated = 1;
|
|
|
|
if (cm_node->accept_pend) {
|
|
BUG_ON(!cm_node->listener);
|
|
atomic_dec(&cm_node->listener->pend_accepts_cnt);
|
|
BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
|
|
}
|
|
|
|
was_timer_set = timer_pending(&cm_core->tcp_timer);
|
|
if (!was_timer_set) {
|
|
cm_core->tcp_timer.expires = jiffies + NES_SHORT_TIME;
|
|
add_timer(&cm_core->tcp_timer);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_addr_resolve_neigh
|
|
*/
|
|
static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip)
|
|
{
|
|
struct rtable *rt;
|
|
struct flowi fl;
|
|
struct neighbour *neigh;
|
|
int rc = -1;
|
|
|
|
memset(&fl, 0, sizeof fl);
|
|
fl.nl_u.ip4_u.daddr = htonl(dst_ip);
|
|
if (ip_route_output_key(&init_net, &rt, &fl)) {
|
|
printk("%s: ip_route_output_key failed for 0x%08X\n",
|
|
__func__, dst_ip);
|
|
return rc;
|
|
}
|
|
|
|
neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
|
|
if (neigh) {
|
|
if (neigh->nud_state & NUD_VALID) {
|
|
nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
|
|
" is %pM, Gateway is 0x%08X \n", dst_ip,
|
|
neigh->ha, ntohl(rt->rt_gateway));
|
|
nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
|
|
dst_ip, NES_ARP_ADD);
|
|
rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
|
|
NES_ARP_RESOLVE);
|
|
}
|
|
neigh_release(neigh);
|
|
}
|
|
|
|
if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
|
|
neigh_event_send(rt->u.dst.neighbour, NULL);
|
|
|
|
ip_rt_put(rt);
|
|
return rc;
|
|
}
|
|
|
|
|
|
/**
|
|
* make_cm_node - create a new instance of a cm node
|
|
*/
|
|
static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
|
|
struct nes_vnic *nesvnic, struct nes_cm_info *cm_info,
|
|
struct nes_cm_listener *listener)
|
|
{
|
|
struct nes_cm_node *cm_node;
|
|
struct timespec ts;
|
|
int arpindex = 0;
|
|
struct nes_device *nesdev;
|
|
struct nes_adapter *nesadapter;
|
|
|
|
/* create an hte and cm_node for this instance */
|
|
cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC);
|
|
if (!cm_node)
|
|
return NULL;
|
|
|
|
/* set our node specific transport info */
|
|
cm_node->loc_addr = cm_info->loc_addr;
|
|
cm_node->rem_addr = cm_info->rem_addr;
|
|
cm_node->loc_port = cm_info->loc_port;
|
|
cm_node->rem_port = cm_info->rem_port;
|
|
cm_node->send_write0 = send_first;
|
|
nes_debug(NES_DBG_CM, "Make node addresses : loc = %pI4:%x, rem = %pI4:%x\n",
|
|
&cm_node->loc_addr, cm_node->loc_port,
|
|
&cm_node->rem_addr, cm_node->rem_port);
|
|
cm_node->listener = listener;
|
|
cm_node->netdev = nesvnic->netdev;
|
|
cm_node->cm_id = cm_info->cm_id;
|
|
memcpy(cm_node->loc_mac, nesvnic->netdev->dev_addr, ETH_ALEN);
|
|
|
|
nes_debug(NES_DBG_CM, "listener=%p, cm_id=%p\n", cm_node->listener,
|
|
cm_node->cm_id);
|
|
|
|
spin_lock_init(&cm_node->retrans_list_lock);
|
|
INIT_LIST_HEAD(&cm_node->recv_list);
|
|
spin_lock_init(&cm_node->recv_list_lock);
|
|
|
|
cm_node->loopbackpartner = NULL;
|
|
atomic_set(&cm_node->ref_count, 1);
|
|
/* associate our parent CM core */
|
|
cm_node->cm_core = cm_core;
|
|
cm_node->tcp_cntxt.loc_id = NES_CM_DEF_LOCAL_ID;
|
|
cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
|
|
cm_node->tcp_cntxt.rcv_wnd = NES_CM_DEFAULT_RCV_WND_SCALED >>
|
|
NES_CM_DEFAULT_RCV_WND_SCALE;
|
|
ts = current_kernel_time();
|
|
cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec);
|
|
cm_node->tcp_cntxt.mss = nesvnic->max_frame_size - sizeof(struct iphdr) -
|
|
sizeof(struct tcphdr) - ETH_HLEN - VLAN_HLEN;
|
|
cm_node->tcp_cntxt.rcv_nxt = 0;
|
|
/* get a unique session ID , add thread_id to an upcounter to handle race */
|
|
atomic_inc(&cm_core->node_cnt);
|
|
cm_node->conn_type = cm_info->conn_type;
|
|
cm_node->apbvt_set = 0;
|
|
cm_node->accept_pend = 0;
|
|
|
|
cm_node->nesvnic = nesvnic;
|
|
/* get some device handles, for arp lookup */
|
|
nesdev = nesvnic->nesdev;
|
|
nesadapter = nesdev->nesadapter;
|
|
|
|
cm_node->loopbackpartner = NULL;
|
|
/* get the mac addr for the remote node */
|
|
if (ipv4_is_loopback(htonl(cm_node->rem_addr)))
|
|
arpindex = nes_arp_table(nesdev, ntohl(nesvnic->local_ipaddr), NULL, NES_ARP_RESOLVE);
|
|
else
|
|
arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
|
|
if (arpindex < 0) {
|
|
arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
|
|
if (arpindex < 0) {
|
|
kfree(cm_node);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* copy the mac addr to node context */
|
|
memcpy(cm_node->rem_mac, nesadapter->arp_table[arpindex].mac_addr, ETH_ALEN);
|
|
nes_debug(NES_DBG_CM, "Remote mac addr from arp table: %pM\n",
|
|
cm_node->rem_mac);
|
|
|
|
add_hte_node(cm_core, cm_node);
|
|
atomic_inc(&cm_nodes_created);
|
|
|
|
return cm_node;
|
|
}
|
|
|
|
|
|
/**
|
|
* add_ref_cm_node - destroy an instance of a cm node
|
|
*/
|
|
static int add_ref_cm_node(struct nes_cm_node *cm_node)
|
|
{
|
|
atomic_inc(&cm_node->ref_count);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* rem_ref_cm_node - destroy an instance of a cm node
|
|
*/
|
|
static int rem_ref_cm_node(struct nes_cm_core *cm_core,
|
|
struct nes_cm_node *cm_node)
|
|
{
|
|
unsigned long flags, qplockflags;
|
|
struct nes_timer_entry *recv_entry;
|
|
struct iw_cm_id *cm_id;
|
|
struct list_head *list_core, *list_node_temp;
|
|
struct nes_qp *nesqp;
|
|
|
|
if (!cm_node)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&cm_node->cm_core->ht_lock, flags);
|
|
if (atomic_dec_return(&cm_node->ref_count)) {
|
|
spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
|
|
return 0;
|
|
}
|
|
list_del(&cm_node->list);
|
|
atomic_dec(&cm_core->ht_node_cnt);
|
|
spin_unlock_irqrestore(&cm_node->cm_core->ht_lock, flags);
|
|
|
|
/* if the node is destroyed before connection was accelerated */
|
|
if (!cm_node->accelerated && cm_node->accept_pend) {
|
|
BUG_ON(!cm_node->listener);
|
|
atomic_dec(&cm_node->listener->pend_accepts_cnt);
|
|
BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0);
|
|
}
|
|
BUG_ON(cm_node->send_entry);
|
|
spin_lock_irqsave(&cm_node->recv_list_lock, flags);
|
|
list_for_each_safe(list_core, list_node_temp, &cm_node->recv_list) {
|
|
recv_entry = container_of(list_core, struct nes_timer_entry,
|
|
list);
|
|
list_del(&recv_entry->list);
|
|
cm_id = cm_node->cm_id;
|
|
spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
|
|
nesqp = (struct nes_qp *)recv_entry->skb;
|
|
spin_lock_irqsave(&nesqp->lock, qplockflags);
|
|
if (nesqp->cm_id) {
|
|
nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
|
|
"NES_TIMER_TYPE_CLOSE with something to do!\n",
|
|
nesqp->hwqp.qp_id, cm_id);
|
|
nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
|
|
nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
|
|
nesqp->ibqp_state = IB_QPS_ERR;
|
|
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
|
|
nes_cm_disconn(nesqp);
|
|
} else {
|
|
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
|
|
nes_debug(NES_DBG_CM, "QP%u: cm_id = %p: HIT A "
|
|
"NES_TIMER_TYPE_CLOSE with nothing to do!\n",
|
|
nesqp->hwqp.qp_id, cm_id);
|
|
}
|
|
cm_id->rem_ref(cm_id);
|
|
|
|
kfree(recv_entry);
|
|
spin_lock_irqsave(&cm_node->recv_list_lock, flags);
|
|
}
|
|
spin_unlock_irqrestore(&cm_node->recv_list_lock, flags);
|
|
|
|
if (cm_node->listener) {
|
|
mini_cm_dec_refcnt_listen(cm_core, cm_node->listener, 0);
|
|
} else {
|
|
if (cm_node->apbvt_set && cm_node->nesvnic) {
|
|
nes_manage_apbvt(cm_node->nesvnic, cm_node->loc_port,
|
|
PCI_FUNC(
|
|
cm_node->nesvnic->nesdev->pcidev->devfn),
|
|
NES_MANAGE_APBVT_DEL);
|
|
}
|
|
}
|
|
|
|
atomic_dec(&cm_core->node_cnt);
|
|
atomic_inc(&cm_nodes_destroyed);
|
|
nesqp = cm_node->nesqp;
|
|
if (nesqp) {
|
|
nesqp->cm_node = NULL;
|
|
nes_rem_ref(&nesqp->ibqp);
|
|
cm_node->nesqp = NULL;
|
|
}
|
|
|
|
cm_node->freed = 1;
|
|
kfree(cm_node);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* process_options
|
|
*/
|
|
static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc,
|
|
u32 optionsize, u32 syn_packet)
|
|
{
|
|
u32 tmp;
|
|
u32 offset = 0;
|
|
union all_known_options *all_options;
|
|
char got_mss_option = 0;
|
|
|
|
while (offset < optionsize) {
|
|
all_options = (union all_known_options *)(optionsloc + offset);
|
|
switch (all_options->as_base.optionnum) {
|
|
case OPTION_NUMBER_END:
|
|
offset = optionsize;
|
|
break;
|
|
case OPTION_NUMBER_NONE:
|
|
offset += 1;
|
|
continue;
|
|
case OPTION_NUMBER_MSS:
|
|
nes_debug(NES_DBG_CM, "%s: MSS Length: %d Offset: %d "
|
|
"Size: %d\n", __func__,
|
|
all_options->as_mss.length, offset, optionsize);
|
|
got_mss_option = 1;
|
|
if (all_options->as_mss.length != 4) {
|
|
return 1;
|
|
} else {
|
|
tmp = ntohs(all_options->as_mss.mss);
|
|
if (tmp > 0 && tmp <
|
|
cm_node->tcp_cntxt.mss)
|
|
cm_node->tcp_cntxt.mss = tmp;
|
|
}
|
|
break;
|
|
case OPTION_NUMBER_WINDOW_SCALE:
|
|
cm_node->tcp_cntxt.snd_wscale =
|
|
all_options->as_windowscale.shiftcount;
|
|
break;
|
|
case OPTION_NUMBER_WRITE0:
|
|
cm_node->send_write0 = 1;
|
|
break;
|
|
default:
|
|
nes_debug(NES_DBG_CM, "TCP Option not understood: %x\n",
|
|
all_options->as_base.optionnum);
|
|
break;
|
|
}
|
|
offset += all_options->as_base.length;
|
|
}
|
|
if ((!got_mss_option) && (syn_packet))
|
|
cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
|
|
return 0;
|
|
}
|
|
|
|
static void drop_packet(struct sk_buff *skb)
|
|
{
|
|
atomic_inc(&cm_accel_dropped_pkts);
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
|
|
static void handle_fin_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
|
|
struct tcphdr *tcph)
|
|
{
|
|
nes_debug(NES_DBG_CM, "Received FIN, cm_node = %p, state = %u. "
|
|
"refcnt=%d\n", cm_node, cm_node->state,
|
|
atomic_read(&cm_node->ref_count));
|
|
cm_node->tcp_cntxt.rcv_nxt++;
|
|
cleanup_retrans_entry(cm_node);
|
|
switch (cm_node->state) {
|
|
case NES_CM_STATE_SYN_RCVD:
|
|
case NES_CM_STATE_SYN_SENT:
|
|
case NES_CM_STATE_ESTABLISHED:
|
|
case NES_CM_STATE_MPAREQ_SENT:
|
|
cm_node->state = NES_CM_STATE_LAST_ACK;
|
|
send_fin(cm_node, skb);
|
|
break;
|
|
case NES_CM_STATE_FIN_WAIT1:
|
|
cm_node->state = NES_CM_STATE_CLOSING;
|
|
send_ack(cm_node, skb);
|
|
break;
|
|
case NES_CM_STATE_FIN_WAIT2:
|
|
cm_node->state = NES_CM_STATE_TIME_WAIT;
|
|
send_ack(cm_node, skb);
|
|
cm_node->state = NES_CM_STATE_CLOSED;
|
|
break;
|
|
case NES_CM_STATE_TSA:
|
|
default:
|
|
nes_debug(NES_DBG_CM, "Error Rcvd FIN for node-%p state = %d\n",
|
|
cm_node, cm_node->state);
|
|
drop_packet(skb);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
static void handle_rst_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
|
|
struct tcphdr *tcph)
|
|
{
|
|
|
|
int reset = 0; /* whether to send reset in case of err.. */
|
|
int passive_state;
|
|
atomic_inc(&cm_resets_recvd);
|
|
nes_debug(NES_DBG_CM, "Received Reset, cm_node = %p, state = %u."
|
|
" refcnt=%d\n", cm_node, cm_node->state,
|
|
atomic_read(&cm_node->ref_count));
|
|
cleanup_retrans_entry(cm_node);
|
|
switch (cm_node->state) {
|
|
case NES_CM_STATE_SYN_SENT:
|
|
case NES_CM_STATE_MPAREQ_SENT:
|
|
nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
|
|
"listener=%p state=%d\n", __func__, __LINE__, cm_node,
|
|
cm_node->listener, cm_node->state);
|
|
active_open_err(cm_node, skb, reset);
|
|
break;
|
|
case NES_CM_STATE_MPAREQ_RCVD:
|
|
passive_state = atomic_add_return(1, &cm_node->passive_state);
|
|
if (passive_state == NES_SEND_RESET_EVENT)
|
|
create_event(cm_node, NES_CM_EVENT_RESET);
|
|
cleanup_retrans_entry(cm_node);
|
|
cm_node->state = NES_CM_STATE_CLOSED;
|
|
dev_kfree_skb_any(skb);
|
|
break;
|
|
case NES_CM_STATE_ESTABLISHED:
|
|
case NES_CM_STATE_SYN_RCVD:
|
|
case NES_CM_STATE_LISTENING:
|
|
nes_debug(NES_DBG_CM, "Bad state %s[%u]\n", __func__, __LINE__);
|
|
passive_open_err(cm_node, skb, reset);
|
|
break;
|
|
case NES_CM_STATE_TSA:
|
|
active_open_err(cm_node, skb, reset);
|
|
break;
|
|
case NES_CM_STATE_CLOSED:
|
|
cleanup_retrans_entry(cm_node);
|
|
drop_packet(skb);
|
|
break;
|
|
default:
|
|
drop_packet(skb);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void handle_rcv_mpa(struct nes_cm_node *cm_node, struct sk_buff *skb,
|
|
enum nes_cm_event_type type)
|
|
{
|
|
|
|
int ret;
|
|
int datasize = skb->len;
|
|
u8 *dataloc = skb->data;
|
|
ret = parse_mpa(cm_node, dataloc, datasize);
|
|
if (ret < 0) {
|
|
nes_debug(NES_DBG_CM, "didn't like MPA Request\n");
|
|
if (type == NES_CM_EVENT_CONNECTED) {
|
|
nes_debug(NES_DBG_CM, "%s[%u] create abort for "
|
|
"cm_node=%p listener=%p state=%d\n", __func__,
|
|
__LINE__, cm_node, cm_node->listener,
|
|
cm_node->state);
|
|
active_open_err(cm_node, skb, 1);
|
|
} else {
|
|
passive_open_err(cm_node, skb, 1);
|
|
}
|
|
} else {
|
|
cleanup_retrans_entry(cm_node);
|
|
dev_kfree_skb_any(skb);
|
|
if (type == NES_CM_EVENT_CONNECTED)
|
|
cm_node->state = NES_CM_STATE_TSA;
|
|
else
|
|
atomic_set(&cm_node->passive_state,
|
|
NES_PASSIVE_STATE_INDICATED);
|
|
create_event(cm_node, type);
|
|
|
|
}
|
|
return ;
|
|
}
|
|
|
|
static void indicate_pkt_err(struct nes_cm_node *cm_node, struct sk_buff *skb)
|
|
{
|
|
switch (cm_node->state) {
|
|
case NES_CM_STATE_SYN_SENT:
|
|
case NES_CM_STATE_MPAREQ_SENT:
|
|
nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
|
|
"listener=%p state=%d\n", __func__, __LINE__, cm_node,
|
|
cm_node->listener, cm_node->state);
|
|
active_open_err(cm_node, skb, 1);
|
|
break;
|
|
case NES_CM_STATE_ESTABLISHED:
|
|
case NES_CM_STATE_SYN_RCVD:
|
|
passive_open_err(cm_node, skb, 1);
|
|
break;
|
|
case NES_CM_STATE_TSA:
|
|
default:
|
|
drop_packet(skb);
|
|
}
|
|
}
|
|
|
|
static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,
|
|
struct sk_buff *skb)
|
|
{
|
|
int err;
|
|
|
|
err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num))? 0 : 1;
|
|
if (err)
|
|
active_open_err(cm_node, skb, 1);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,
|
|
struct sk_buff *skb)
|
|
{
|
|
int err = 0;
|
|
u32 seq;
|
|
u32 ack_seq;
|
|
u32 loc_seq_num = cm_node->tcp_cntxt.loc_seq_num;
|
|
u32 rcv_nxt = cm_node->tcp_cntxt.rcv_nxt;
|
|
u32 rcv_wnd;
|
|
seq = ntohl(tcph->seq);
|
|
ack_seq = ntohl(tcph->ack_seq);
|
|
rcv_wnd = cm_node->tcp_cntxt.rcv_wnd;
|
|
if (ack_seq != loc_seq_num)
|
|
err = 1;
|
|
else if ((seq + rcv_wnd) < rcv_nxt)
|
|
err = 1;
|
|
if (err) {
|
|
nes_debug(NES_DBG_CM, "%s[%u] create abort for cm_node=%p "
|
|
"listener=%p state=%d\n", __func__, __LINE__, cm_node,
|
|
cm_node->listener, cm_node->state);
|
|
indicate_pkt_err(cm_node, skb);
|
|
nes_debug(NES_DBG_CM, "seq ERROR cm_node =%p seq=0x%08X "
|
|
"rcv_nxt=0x%08X rcv_wnd=0x%x\n", cm_node, seq, rcv_nxt,
|
|
rcv_wnd);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* handle_syn_pkt() is for Passive node. The syn packet is received when a node
|
|
* is created with a listener or it may comein as rexmitted packet which in
|
|
* that case will be just dropped.
|
|
*/
|
|
|
|
static void handle_syn_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
|
|
struct tcphdr *tcph)
|
|
{
|
|
int ret;
|
|
u32 inc_sequence;
|
|
int optionsize;
|
|
|
|
optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
|
|
skb_trim(skb, 0);
|
|
inc_sequence = ntohl(tcph->seq);
|
|
|
|
switch (cm_node->state) {
|
|
case NES_CM_STATE_SYN_SENT:
|
|
case NES_CM_STATE_MPAREQ_SENT:
|
|
/* Rcvd syn on active open connection*/
|
|
active_open_err(cm_node, skb, 1);
|
|
break;
|
|
case NES_CM_STATE_LISTENING:
|
|
/* Passive OPEN */
|
|
cm_node->accept_pend = 1;
|
|
atomic_inc(&cm_node->listener->pend_accepts_cnt);
|
|
if (atomic_read(&cm_node->listener->pend_accepts_cnt) >
|
|
cm_node->listener->backlog) {
|
|
nes_debug(NES_DBG_CM, "drop syn due to backlog "
|
|
"pressure \n");
|
|
cm_backlog_drops++;
|
|
passive_open_err(cm_node, skb, 0);
|
|
break;
|
|
}
|
|
ret = handle_tcp_options(cm_node, tcph, skb, optionsize,
|
|
1);
|
|
if (ret) {
|
|
passive_open_err(cm_node, skb, 0);
|
|
/* drop pkt */
|
|
break;
|
|
}
|
|
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
|
|
BUG_ON(cm_node->send_entry);
|
|
cm_node->state = NES_CM_STATE_SYN_RCVD;
|
|
send_syn(cm_node, 1, skb);
|
|
break;
|
|
case NES_CM_STATE_CLOSED:
|
|
cleanup_retrans_entry(cm_node);
|
|
send_reset(cm_node, skb);
|
|
break;
|
|
case NES_CM_STATE_TSA:
|
|
case NES_CM_STATE_ESTABLISHED:
|
|
case NES_CM_STATE_FIN_WAIT1:
|
|
case NES_CM_STATE_FIN_WAIT2:
|
|
case NES_CM_STATE_MPAREQ_RCVD:
|
|
case NES_CM_STATE_LAST_ACK:
|
|
case NES_CM_STATE_CLOSING:
|
|
case NES_CM_STATE_UNKNOWN:
|
|
default:
|
|
drop_packet(skb);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void handle_synack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
|
|
struct tcphdr *tcph)
|
|
{
|
|
|
|
int ret;
|
|
u32 inc_sequence;
|
|
int optionsize;
|
|
|
|
optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
|
|
skb_trim(skb, 0);
|
|
inc_sequence = ntohl(tcph->seq);
|
|
switch (cm_node->state) {
|
|
case NES_CM_STATE_SYN_SENT:
|
|
/* active open */
|
|
if (check_syn(cm_node, tcph, skb))
|
|
return;
|
|
cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
|
|
/* setup options */
|
|
ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);
|
|
if (ret) {
|
|
nes_debug(NES_DBG_CM, "cm_node=%p tcp_options failed\n",
|
|
cm_node);
|
|
break;
|
|
}
|
|
cleanup_retrans_entry(cm_node);
|
|
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1;
|
|
send_mpa_request(cm_node, skb);
|
|
cm_node->state = NES_CM_STATE_MPAREQ_SENT;
|
|
break;
|
|
case NES_CM_STATE_MPAREQ_RCVD:
|
|
/* passive open, so should not be here */
|
|
passive_open_err(cm_node, skb, 1);
|
|
break;
|
|
case NES_CM_STATE_LISTENING:
|
|
case NES_CM_STATE_CLOSED:
|
|
cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
|
|
cleanup_retrans_entry(cm_node);
|
|
send_reset(cm_node, skb);
|
|
break;
|
|
case NES_CM_STATE_ESTABLISHED:
|
|
case NES_CM_STATE_FIN_WAIT1:
|
|
case NES_CM_STATE_FIN_WAIT2:
|
|
case NES_CM_STATE_LAST_ACK:
|
|
case NES_CM_STATE_TSA:
|
|
case NES_CM_STATE_CLOSING:
|
|
case NES_CM_STATE_UNKNOWN:
|
|
case NES_CM_STATE_MPAREQ_SENT:
|
|
default:
|
|
drop_packet(skb);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb,
|
|
struct tcphdr *tcph)
|
|
{
|
|
int datasize = 0;
|
|
u32 inc_sequence;
|
|
u32 rem_seq_ack;
|
|
u32 rem_seq;
|
|
int ret;
|
|
int optionsize;
|
|
u32 temp_seq = cm_node->tcp_cntxt.loc_seq_num;
|
|
|
|
optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);
|
|
cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);
|
|
|
|
if (check_seq(cm_node, tcph, skb))
|
|
return;
|
|
|
|
skb_pull(skb, tcph->doff << 2);
|
|
inc_sequence = ntohl(tcph->seq);
|
|
rem_seq = ntohl(tcph->seq);
|
|
rem_seq_ack = ntohl(tcph->ack_seq);
|
|
datasize = skb->len;
|
|
|
|
switch (cm_node->state) {
|
|
case NES_CM_STATE_SYN_RCVD:
|
|
/* Passive OPEN */
|
|
ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);
|
|
if (ret)
|
|
break;
|
|
cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
|
|
cm_node->tcp_cntxt.loc_seq_num = temp_seq;
|
|
if (cm_node->tcp_cntxt.rem_ack_num !=
|
|
cm_node->tcp_cntxt.loc_seq_num) {
|
|
nes_debug(NES_DBG_CM, "rem_ack_num != loc_seq_num\n");
|
|
cleanup_retrans_entry(cm_node);
|
|
send_reset(cm_node, skb);
|
|
return;
|
|
}
|
|
cm_node->state = NES_CM_STATE_ESTABLISHED;
|
|
if (datasize) {
|
|
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
|
|
cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
|
|
handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_MPA_REQ);
|
|
} else { /* rcvd ACK only */
|
|
dev_kfree_skb_any(skb);
|
|
cleanup_retrans_entry(cm_node);
|
|
}
|
|
break;
|
|
case NES_CM_STATE_ESTABLISHED:
|
|
/* Passive OPEN */
|
|
/* We expect mpa frame to be received only */
|
|
if (datasize) {
|
|
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
|
|
cm_node->state = NES_CM_STATE_MPAREQ_RCVD;
|
|
handle_rcv_mpa(cm_node, skb,
|
|
NES_CM_EVENT_MPA_REQ);
|
|
} else
|
|
drop_packet(skb);
|
|
break;
|
|
case NES_CM_STATE_MPAREQ_SENT:
|
|
cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);
|
|
if (datasize) {
|
|
cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize;
|
|
handle_rcv_mpa(cm_node, skb, NES_CM_EVENT_CONNECTED);
|
|
} else { /* Could be just an ack pkt.. */
|
|
cleanup_retrans_entry(cm_node);
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
break;
|
|
case NES_CM_STATE_LISTENING:
|
|
case NES_CM_STATE_CLOSED:
|
|
cleanup_retrans_entry(cm_node);
|
|
send_reset(cm_node, skb);
|
|
break;
|
|
case NES_CM_STATE_FIN_WAIT1:
|
|
case NES_CM_STATE_SYN_SENT:
|
|
case NES_CM_STATE_FIN_WAIT2:
|
|
case NES_CM_STATE_TSA:
|
|
case NES_CM_STATE_MPAREQ_RCVD:
|
|
case NES_CM_STATE_LAST_ACK:
|
|
case NES_CM_STATE_CLOSING:
|
|
case NES_CM_STATE_UNKNOWN:
|
|
default:
|
|
drop_packet(skb);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,
|
|
struct sk_buff *skb, int optionsize, int passive)
|
|
{
|
|
u8 *optionsloc = (u8 *)&tcph[1];
|
|
if (optionsize) {
|
|
if (process_options(cm_node, optionsloc, optionsize,
|
|
(u32)tcph->syn)) {
|
|
nes_debug(NES_DBG_CM, "%s: Node %p, Sending RESET\n",
|
|
__func__, cm_node);
|
|
if (passive)
|
|
passive_open_err(cm_node, skb, 1);
|
|
else
|
|
active_open_err(cm_node, skb, 1);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<
|
|
cm_node->tcp_cntxt.snd_wscale;
|
|
|
|
if (cm_node->tcp_cntxt.snd_wnd > cm_node->tcp_cntxt.max_snd_wnd)
|
|
cm_node->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.snd_wnd;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* active_open_err() will send reset() if flag set..
|
|
* It will also send ABORT event.
|
|
*/
|
|
|
|
static void active_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
|
|
int reset)
|
|
{
|
|
cleanup_retrans_entry(cm_node);
|
|
if (reset) {
|
|
nes_debug(NES_DBG_CM, "ERROR active err called for cm_node=%p, "
|
|
"state=%d\n", cm_node, cm_node->state);
|
|
add_ref_cm_node(cm_node);
|
|
send_reset(cm_node, skb);
|
|
} else
|
|
dev_kfree_skb_any(skb);
|
|
|
|
cm_node->state = NES_CM_STATE_CLOSED;
|
|
create_event(cm_node, NES_CM_EVENT_ABORTED);
|
|
}
|
|
|
|
/*
|
|
* passive_open_err() will either do a reset() or will free up the skb and
|
|
* remove the cm_node.
|
|
*/
|
|
|
|
static void passive_open_err(struct nes_cm_node *cm_node, struct sk_buff *skb,
|
|
int reset)
|
|
{
|
|
cleanup_retrans_entry(cm_node);
|
|
cm_node->state = NES_CM_STATE_CLOSED;
|
|
if (reset) {
|
|
nes_debug(NES_DBG_CM, "passive_open_err sending RST for "
|
|
"cm_node=%p state =%d\n", cm_node, cm_node->state);
|
|
send_reset(cm_node, skb);
|
|
} else {
|
|
dev_kfree_skb_any(skb);
|
|
rem_ref_cm_node(cm_node->cm_core, cm_node);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* free_retrans_entry() routines assumes that the retrans_list_lock has
|
|
* been acquired before calling.
|
|
*/
|
|
static void free_retrans_entry(struct nes_cm_node *cm_node)
|
|
{
|
|
struct nes_timer_entry *send_entry;
|
|
send_entry = cm_node->send_entry;
|
|
if (send_entry) {
|
|
cm_node->send_entry = NULL;
|
|
dev_kfree_skb_any(send_entry->skb);
|
|
kfree(send_entry);
|
|
rem_ref_cm_node(cm_node->cm_core, cm_node);
|
|
}
|
|
}
|
|
|
|
static void cleanup_retrans_entry(struct nes_cm_node *cm_node)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cm_node->retrans_list_lock, flags);
|
|
free_retrans_entry(cm_node);
|
|
spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* process_packet
|
|
* Returns skb if to be freed, else it will return NULL if already used..
|
|
*/
|
|
static void process_packet(struct nes_cm_node *cm_node, struct sk_buff *skb,
|
|
struct nes_cm_core *cm_core)
|
|
{
|
|
enum nes_tcpip_pkt_type pkt_type = NES_PKT_TYPE_UNKNOWN;
|
|
struct tcphdr *tcph = tcp_hdr(skb);
|
|
skb_pull(skb, ip_hdr(skb)->ihl << 2);
|
|
|
|
nes_debug(NES_DBG_CM, "process_packet: cm_node=%p state =%d syn=%d "
|
|
"ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,
|
|
tcph->ack, tcph->rst, tcph->fin);
|
|
|
|
if (tcph->rst)
|
|
pkt_type = NES_PKT_TYPE_RST;
|
|
else if (tcph->syn) {
|
|
pkt_type = NES_PKT_TYPE_SYN;
|
|
if (tcph->ack)
|
|
pkt_type = NES_PKT_TYPE_SYNACK;
|
|
} else if (tcph->fin)
|
|
pkt_type = NES_PKT_TYPE_FIN;
|
|
else if (tcph->ack)
|
|
pkt_type = NES_PKT_TYPE_ACK;
|
|
|
|
switch (pkt_type) {
|
|
case NES_PKT_TYPE_SYN:
|
|
handle_syn_pkt(cm_node, skb, tcph);
|
|
break;
|
|
case NES_PKT_TYPE_SYNACK:
|
|
handle_synack_pkt(cm_node, skb, tcph);
|
|
break;
|
|
case NES_PKT_TYPE_ACK:
|
|
handle_ack_pkt(cm_node, skb, tcph);
|
|
break;
|
|
case NES_PKT_TYPE_RST:
|
|
handle_rst_pkt(cm_node, skb, tcph);
|
|
break;
|
|
case NES_PKT_TYPE_FIN:
|
|
handle_fin_pkt(cm_node, skb, tcph);
|
|
break;
|
|
default:
|
|
drop_packet(skb);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* mini_cm_listen - create a listen node with params
|
|
*/
|
|
static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
|
|
struct nes_vnic *nesvnic, struct nes_cm_info *cm_info)
|
|
{
|
|
struct nes_cm_listener *listener;
|
|
unsigned long flags;
|
|
|
|
nes_debug(NES_DBG_CM, "Search for 0x%08x : 0x%04x\n",
|
|
cm_info->loc_addr, cm_info->loc_port);
|
|
|
|
/* cannot have multiple matching listeners */
|
|
listener = find_listener(cm_core, htonl(cm_info->loc_addr),
|
|
htons(cm_info->loc_port), NES_CM_LISTENER_EITHER_STATE);
|
|
if (listener && listener->listener_state == NES_CM_LISTENER_ACTIVE_STATE) {
|
|
/* find automatically incs ref count ??? */
|
|
atomic_dec(&listener->ref_count);
|
|
nes_debug(NES_DBG_CM, "Not creating listener since it already exists\n");
|
|
return NULL;
|
|
}
|
|
|
|
if (!listener) {
|
|
/* create a CM listen node (1/2 node to compare incoming traffic to) */
|
|
listener = kzalloc(sizeof(*listener), GFP_ATOMIC);
|
|
if (!listener) {
|
|
nes_debug(NES_DBG_CM, "Not creating listener memory allocation failed\n");
|
|
return NULL;
|
|
}
|
|
|
|
listener->loc_addr = htonl(cm_info->loc_addr);
|
|
listener->loc_port = htons(cm_info->loc_port);
|
|
listener->reused_node = 0;
|
|
|
|
atomic_set(&listener->ref_count, 1);
|
|
}
|
|
/* pasive case */
|
|
/* find already inc'ed the ref count */
|
|
else {
|
|
listener->reused_node = 1;
|
|
}
|
|
|
|
listener->cm_id = cm_info->cm_id;
|
|
atomic_set(&listener->pend_accepts_cnt, 0);
|
|
listener->cm_core = cm_core;
|
|
listener->nesvnic = nesvnic;
|
|
atomic_inc(&cm_core->node_cnt);
|
|
|
|
listener->conn_type = cm_info->conn_type;
|
|
listener->backlog = cm_info->backlog;
|
|
listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;
|
|
|
|
if (!listener->reused_node) {
|
|
spin_lock_irqsave(&cm_core->listen_list_lock, flags);
|
|
list_add(&listener->list, &cm_core->listen_list.list);
|
|
spin_unlock_irqrestore(&cm_core->listen_list_lock, flags);
|
|
atomic_inc(&cm_core->listen_node_cnt);
|
|
}
|
|
|
|
nes_debug(NES_DBG_CM, "Api - listen(): addr=0x%08X, port=0x%04x,"
|
|
" listener = %p, backlog = %d, cm_id = %p.\n",
|
|
cm_info->loc_addr, cm_info->loc_port,
|
|
listener, listener->backlog, listener->cm_id);
|
|
|
|
return listener;
|
|
}
|
|
|
|
|
|
/**
|
|
* mini_cm_connect - make a connection node with params
|
|
*/
|
|
static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *cm_core,
|
|
struct nes_vnic *nesvnic, u16 private_data_len,
|
|
void *private_data, struct nes_cm_info *cm_info)
|
|
{
|
|
int ret = 0;
|
|
struct nes_cm_node *cm_node;
|
|
struct nes_cm_listener *loopbackremotelistener;
|
|
struct nes_cm_node *loopbackremotenode;
|
|
struct nes_cm_info loopback_cm_info;
|
|
u16 mpa_frame_size = sizeof(struct ietf_mpa_frame) + private_data_len;
|
|
struct ietf_mpa_frame *mpa_frame = NULL;
|
|
|
|
/* create a CM connection node */
|
|
cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL);
|
|
if (!cm_node)
|
|
return NULL;
|
|
mpa_frame = &cm_node->mpa_frame;
|
|
strcpy(mpa_frame->key, IEFT_MPA_KEY_REQ);
|
|
mpa_frame->flags = IETF_MPA_FLAGS_CRC;
|
|
mpa_frame->rev = IETF_MPA_VERSION;
|
|
mpa_frame->priv_data_len = htons(private_data_len);
|
|
|
|
/* set our node side to client (active) side */
|
|
cm_node->tcp_cntxt.client = 1;
|
|
cm_node->tcp_cntxt.rcv_wscale = NES_CM_DEFAULT_RCV_WND_SCALE;
|
|
|
|
if (cm_info->loc_addr == cm_info->rem_addr) {
|
|
loopbackremotelistener = find_listener(cm_core,
|
|
ntohl(nesvnic->local_ipaddr), cm_node->rem_port,
|
|
NES_CM_LISTENER_ACTIVE_STATE);
|
|
if (loopbackremotelistener == NULL) {
|
|
create_event(cm_node, NES_CM_EVENT_ABORTED);
|
|
} else {
|
|
atomic_inc(&cm_loopbacks);
|
|
loopback_cm_info = *cm_info;
|
|
loopback_cm_info.loc_port = cm_info->rem_port;
|
|
loopback_cm_info.rem_port = cm_info->loc_port;
|
|
loopback_cm_info.cm_id = loopbackremotelistener->cm_id;
|
|
loopbackremotenode = make_cm_node(cm_core, nesvnic,
|
|
&loopback_cm_info, loopbackremotelistener);
|
|
loopbackremotenode->loopbackpartner = cm_node;
|
|
loopbackremotenode->tcp_cntxt.rcv_wscale =
|
|
NES_CM_DEFAULT_RCV_WND_SCALE;
|
|
cm_node->loopbackpartner = loopbackremotenode;
|
|
memcpy(loopbackremotenode->mpa_frame_buf, private_data,
|
|
private_data_len);
|
|
loopbackremotenode->mpa_frame_size = private_data_len;
|
|
|
|
/* we are done handling this state. */
|
|
/* set node to a TSA state */
|
|
cm_node->state = NES_CM_STATE_TSA;
|
|
cm_node->tcp_cntxt.rcv_nxt =
|
|
loopbackremotenode->tcp_cntxt.loc_seq_num;
|
|
loopbackremotenode->tcp_cntxt.rcv_nxt =
|
|
cm_node->tcp_cntxt.loc_seq_num;
|
|
cm_node->tcp_cntxt.max_snd_wnd =
|
|
loopbackremotenode->tcp_cntxt.rcv_wnd;
|
|
loopbackremotenode->tcp_cntxt.max_snd_wnd =
|
|
cm_node->tcp_cntxt.rcv_wnd;
|
|
cm_node->tcp_cntxt.snd_wnd =
|
|
loopbackremotenode->tcp_cntxt.rcv_wnd;
|
|
loopbackremotenode->tcp_cntxt.snd_wnd =
|
|
cm_node->tcp_cntxt.rcv_wnd;
|
|
cm_node->tcp_cntxt.snd_wscale =
|
|
loopbackremotenode->tcp_cntxt.rcv_wscale;
|
|
loopbackremotenode->tcp_cntxt.snd_wscale =
|
|
cm_node->tcp_cntxt.rcv_wscale;
|
|
|
|
create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ);
|
|
}
|
|
return cm_node;
|
|
}
|
|
|
|
/* set our node side to client (active) side */
|
|
cm_node->tcp_cntxt.client = 1;
|
|
/* init our MPA frame ptr */
|
|
memcpy(mpa_frame->priv_data, private_data, private_data_len);
|
|
|
|
cm_node->mpa_frame_size = mpa_frame_size;
|
|
|
|
/* send a syn and goto syn sent state */
|
|
cm_node->state = NES_CM_STATE_SYN_SENT;
|
|
ret = send_syn(cm_node, 0, NULL);
|
|
|
|
if (ret) {
|
|
/* error in sending the syn free up the cm_node struct */
|
|
nes_debug(NES_DBG_CM, "Api - connect() FAILED: dest "
|
|
"addr=0x%08X, port=0x%04x, cm_node=%p, cm_id = %p.\n",
|
|
cm_node->rem_addr, cm_node->rem_port, cm_node,
|
|
cm_node->cm_id);
|
|
rem_ref_cm_node(cm_node->cm_core, cm_node);
|
|
cm_node = NULL;
|
|
}
|
|
|
|
if (cm_node)
|
|
nes_debug(NES_DBG_CM, "Api - connect(): dest addr=0x%08X,"
|
|
"port=0x%04x, cm_node=%p, cm_id = %p.\n",
|
|
cm_node->rem_addr, cm_node->rem_port, cm_node,
|
|
cm_node->cm_id);
|
|
|
|
return cm_node;
|
|
}
|
|
|
|
|
|
/**
|
|
* mini_cm_accept - accept a connection
|
|
* This function is never called
|
|
*/
|
|
static int mini_cm_accept(struct nes_cm_core *cm_core,
|
|
struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* mini_cm_reject - reject and teardown a connection
|
|
*/
|
|
static int mini_cm_reject(struct nes_cm_core *cm_core,
|
|
struct ietf_mpa_frame *mpa_frame, struct nes_cm_node *cm_node)
|
|
{
|
|
int ret = 0;
|
|
int passive_state;
|
|
|
|
nes_debug(NES_DBG_CM, "%s cm_node=%p type=%d state=%d\n",
|
|
__func__, cm_node, cm_node->tcp_cntxt.client, cm_node->state);
|
|
|
|
if (cm_node->tcp_cntxt.client)
|
|
return ret;
|
|
cleanup_retrans_entry(cm_node);
|
|
|
|
passive_state = atomic_add_return(1, &cm_node->passive_state);
|
|
cm_node->state = NES_CM_STATE_CLOSED;
|
|
if (passive_state == NES_SEND_RESET_EVENT)
|
|
rem_ref_cm_node(cm_core, cm_node);
|
|
else
|
|
ret = send_reset(cm_node, NULL);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* mini_cm_close
|
|
*/
|
|
static int mini_cm_close(struct nes_cm_core *cm_core, struct nes_cm_node *cm_node)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (!cm_core || !cm_node)
|
|
return -EINVAL;
|
|
|
|
switch (cm_node->state) {
|
|
case NES_CM_STATE_SYN_RCVD:
|
|
case NES_CM_STATE_SYN_SENT:
|
|
case NES_CM_STATE_ONE_SIDE_ESTABLISHED:
|
|
case NES_CM_STATE_ESTABLISHED:
|
|
case NES_CM_STATE_ACCEPTING:
|
|
case NES_CM_STATE_MPAREQ_SENT:
|
|
case NES_CM_STATE_MPAREQ_RCVD:
|
|
cleanup_retrans_entry(cm_node);
|
|
send_reset(cm_node, NULL);
|
|
break;
|
|
case NES_CM_STATE_CLOSE_WAIT:
|
|
cm_node->state = NES_CM_STATE_LAST_ACK;
|
|
send_fin(cm_node, NULL);
|
|
break;
|
|
case NES_CM_STATE_FIN_WAIT1:
|
|
case NES_CM_STATE_FIN_WAIT2:
|
|
case NES_CM_STATE_LAST_ACK:
|
|
case NES_CM_STATE_TIME_WAIT:
|
|
case NES_CM_STATE_CLOSING:
|
|
ret = -1;
|
|
break;
|
|
case NES_CM_STATE_LISTENING:
|
|
case NES_CM_STATE_UNKNOWN:
|
|
case NES_CM_STATE_INITED:
|
|
case NES_CM_STATE_CLOSED:
|
|
ret = rem_ref_cm_node(cm_core, cm_node);
|
|
break;
|
|
case NES_CM_STATE_TSA:
|
|
if (cm_node->send_entry)
|
|
printk(KERN_ERR "ERROR Close got called from STATE_TSA "
|
|
"send_entry=%p\n", cm_node->send_entry);
|
|
ret = rem_ref_cm_node(cm_core, cm_node);
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* recv_pkt - recv an ETHERNET packet, and process it through CM
|
|
* node state machine
|
|
*/
|
|
static int mini_cm_recv_pkt(struct nes_cm_core *cm_core,
|
|
struct nes_vnic *nesvnic, struct sk_buff *skb)
|
|
{
|
|
struct nes_cm_node *cm_node = NULL;
|
|
struct nes_cm_listener *listener = NULL;
|
|
struct iphdr *iph;
|
|
struct tcphdr *tcph;
|
|
struct nes_cm_info nfo;
|
|
int skb_handled = 1;
|
|
__be32 tmp_daddr, tmp_saddr;
|
|
|
|
if (!skb)
|
|
return 0;
|
|
if (skb->len < sizeof(struct iphdr) + sizeof(struct tcphdr)) {
|
|
return 0;
|
|
}
|
|
|
|
iph = (struct iphdr *)skb->data;
|
|
tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));
|
|
|
|
nfo.loc_addr = ntohl(iph->daddr);
|
|
nfo.loc_port = ntohs(tcph->dest);
|
|
nfo.rem_addr = ntohl(iph->saddr);
|
|
nfo.rem_port = ntohs(tcph->source);
|
|
|
|
tmp_daddr = cpu_to_be32(iph->daddr);
|
|
tmp_saddr = cpu_to_be32(iph->saddr);
|
|
|
|
nes_debug(NES_DBG_CM, "Received packet: dest=%pI4:0x%04X src=%pI4:0x%04X\n",
|
|
&tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);
|
|
|
|
do {
|
|
cm_node = find_node(cm_core,
|
|
nfo.rem_port, nfo.rem_addr,
|
|
nfo.loc_port, nfo.loc_addr);
|
|
|
|
if (!cm_node) {
|
|
/* Only type of packet accepted are for */
|
|
/* the PASSIVE open (syn only) */
|
|
if ((!tcph->syn) || (tcph->ack)) {
|
|
skb_handled = 0;
|
|
break;
|
|
}
|
|
listener = find_listener(cm_core, nfo.loc_addr,
|
|
nfo.loc_port,
|
|
NES_CM_LISTENER_ACTIVE_STATE);
|
|
if (!listener) {
|
|
nfo.cm_id = NULL;
|
|
nfo.conn_type = 0;
|
|
nes_debug(NES_DBG_CM, "Unable to find listener for the pkt\n");
|
|
skb_handled = 0;
|
|
break;
|
|
}
|
|
nfo.cm_id = listener->cm_id;
|
|
nfo.conn_type = listener->conn_type;
|
|
cm_node = make_cm_node(cm_core, nesvnic, &nfo,
|
|
listener);
|
|
if (!cm_node) {
|
|
nes_debug(NES_DBG_CM, "Unable to allocate "
|
|
"node\n");
|
|
cm_packets_dropped++;
|
|
atomic_dec(&listener->ref_count);
|
|
dev_kfree_skb_any(skb);
|
|
break;
|
|
}
|
|
if (!tcph->rst && !tcph->fin) {
|
|
cm_node->state = NES_CM_STATE_LISTENING;
|
|
} else {
|
|
cm_packets_dropped++;
|
|
rem_ref_cm_node(cm_core, cm_node);
|
|
dev_kfree_skb_any(skb);
|
|
break;
|
|
}
|
|
add_ref_cm_node(cm_node);
|
|
} else if (cm_node->state == NES_CM_STATE_TSA) {
|
|
rem_ref_cm_node(cm_core, cm_node);
|
|
atomic_inc(&cm_accel_dropped_pkts);
|
|
dev_kfree_skb_any(skb);
|
|
break;
|
|
}
|
|
skb_reset_network_header(skb);
|
|
skb_set_transport_header(skb, sizeof(*tcph));
|
|
skb->len = ntohs(iph->tot_len);
|
|
process_packet(cm_node, skb, cm_core);
|
|
rem_ref_cm_node(cm_core, cm_node);
|
|
} while (0);
|
|
return skb_handled;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_cm_alloc_core - allocate a top level instance of a cm core
|
|
*/
|
|
static struct nes_cm_core *nes_cm_alloc_core(void)
|
|
{
|
|
struct nes_cm_core *cm_core;
|
|
|
|
/* setup the CM core */
|
|
/* alloc top level core control structure */
|
|
cm_core = kzalloc(sizeof(*cm_core), GFP_KERNEL);
|
|
if (!cm_core)
|
|
return NULL;
|
|
|
|
INIT_LIST_HEAD(&cm_core->connected_nodes);
|
|
init_timer(&cm_core->tcp_timer);
|
|
cm_core->tcp_timer.function = nes_cm_timer_tick;
|
|
|
|
cm_core->mtu = NES_CM_DEFAULT_MTU;
|
|
cm_core->state = NES_CM_STATE_INITED;
|
|
cm_core->free_tx_pkt_max = NES_CM_DEFAULT_FREE_PKTS;
|
|
|
|
atomic_set(&cm_core->events_posted, 0);
|
|
|
|
cm_core->api = &nes_cm_api;
|
|
|
|
spin_lock_init(&cm_core->ht_lock);
|
|
spin_lock_init(&cm_core->listen_list_lock);
|
|
|
|
INIT_LIST_HEAD(&cm_core->listen_list.list);
|
|
|
|
nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
|
|
|
|
nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
|
|
cm_core->event_wq = create_singlethread_workqueue("nesewq");
|
|
cm_core->post_event = nes_cm_post_event;
|
|
nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
|
|
cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
|
|
|
|
print_core(cm_core);
|
|
return cm_core;
|
|
}
|
|
|
|
|
|
/**
|
|
* mini_cm_dealloc_core - deallocate a top level instance of a cm core
|
|
*/
|
|
static int mini_cm_dealloc_core(struct nes_cm_core *cm_core)
|
|
{
|
|
nes_debug(NES_DBG_CM, "De-Alloc CM Core (%p)\n", cm_core);
|
|
|
|
if (!cm_core)
|
|
return -EINVAL;
|
|
|
|
barrier();
|
|
|
|
if (timer_pending(&cm_core->tcp_timer)) {
|
|
del_timer(&cm_core->tcp_timer);
|
|
}
|
|
|
|
destroy_workqueue(cm_core->event_wq);
|
|
destroy_workqueue(cm_core->disconn_wq);
|
|
nes_debug(NES_DBG_CM, "\n");
|
|
kfree(cm_core);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* mini_cm_get
|
|
*/
|
|
static int mini_cm_get(struct nes_cm_core *cm_core)
|
|
{
|
|
return cm_core->state;
|
|
}
|
|
|
|
|
|
/**
|
|
* mini_cm_set
|
|
*/
|
|
static int mini_cm_set(struct nes_cm_core *cm_core, u32 type, u32 value)
|
|
{
|
|
int ret = 0;
|
|
|
|
switch (type) {
|
|
case NES_CM_SET_PKT_SIZE:
|
|
cm_core->mtu = value;
|
|
break;
|
|
case NES_CM_SET_FREE_PKT_Q_SIZE:
|
|
cm_core->free_tx_pkt_max = value;
|
|
break;
|
|
default:
|
|
/* unknown set option */
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_cm_init_tsa_conn setup HW; MPA frames must be
|
|
* successfully exchanged when this is called
|
|
*/
|
|
static int nes_cm_init_tsa_conn(struct nes_qp *nesqp, struct nes_cm_node *cm_node)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (!nesqp)
|
|
return -EINVAL;
|
|
|
|
nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_IPV4 |
|
|
NES_QPCONTEXT_MISC_NO_NAGLE | NES_QPCONTEXT_MISC_DO_NOT_FRAG |
|
|
NES_QPCONTEXT_MISC_DROS);
|
|
|
|
if (cm_node->tcp_cntxt.snd_wscale || cm_node->tcp_cntxt.rcv_wscale)
|
|
nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WSCALE);
|
|
|
|
nesqp->nesqp_context->misc2 |= cpu_to_le32(64 << NES_QPCONTEXT_MISC2_TTL_SHIFT);
|
|
|
|
nesqp->nesqp_context->mss |= cpu_to_le32(((u32)cm_node->tcp_cntxt.mss) << 16);
|
|
|
|
nesqp->nesqp_context->tcp_state_flow_label |= cpu_to_le32(
|
|
(u32)NES_QPCONTEXT_TCPSTATE_EST << NES_QPCONTEXT_TCPFLOW_TCP_STATE_SHIFT);
|
|
|
|
nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
|
|
(cm_node->tcp_cntxt.snd_wscale << NES_QPCONTEXT_PDWSCALE_SND_WSCALE_SHIFT) &
|
|
NES_QPCONTEXT_PDWSCALE_SND_WSCALE_MASK);
|
|
|
|
nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32(
|
|
(cm_node->tcp_cntxt.rcv_wscale << NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_SHIFT) &
|
|
NES_QPCONTEXT_PDWSCALE_RCV_WSCALE_MASK);
|
|
|
|
nesqp->nesqp_context->keepalive = cpu_to_le32(0x80);
|
|
nesqp->nesqp_context->ts_recent = 0;
|
|
nesqp->nesqp_context->ts_age = 0;
|
|
nesqp->nesqp_context->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
|
|
nesqp->nesqp_context->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd);
|
|
nesqp->nesqp_context->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
|
|
nesqp->nesqp_context->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd <<
|
|
cm_node->tcp_cntxt.rcv_wscale);
|
|
nesqp->nesqp_context->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
|
|
nesqp->nesqp_context->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
|
|
nesqp->nesqp_context->srtt = 0;
|
|
nesqp->nesqp_context->rttvar = cpu_to_le32(0x6);
|
|
nesqp->nesqp_context->ssthresh = cpu_to_le32(0x3FFFC000);
|
|
nesqp->nesqp_context->cwnd = cpu_to_le32(2*cm_node->tcp_cntxt.mss);
|
|
nesqp->nesqp_context->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt);
|
|
nesqp->nesqp_context->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num);
|
|
nesqp->nesqp_context->max_snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd);
|
|
|
|
nes_debug(NES_DBG_CM, "QP%u: rcv_nxt = 0x%08X, snd_nxt = 0x%08X,"
|
|
" Setting MSS to %u, PDWscale = 0x%08X, rcv_wnd = %u, context misc = 0x%08X.\n",
|
|
nesqp->hwqp.qp_id, le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
|
|
le32_to_cpu(nesqp->nesqp_context->snd_nxt),
|
|
cm_node->tcp_cntxt.mss, le32_to_cpu(nesqp->nesqp_context->pd_index_wscale),
|
|
le32_to_cpu(nesqp->nesqp_context->rcv_wnd),
|
|
le32_to_cpu(nesqp->nesqp_context->misc));
|
|
nes_debug(NES_DBG_CM, " snd_wnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->snd_wnd));
|
|
nes_debug(NES_DBG_CM, " snd_cwnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->cwnd));
|
|
nes_debug(NES_DBG_CM, " max_swnd = 0x%08X.\n", le32_to_cpu(nesqp->nesqp_context->max_snd_wnd));
|
|
|
|
nes_debug(NES_DBG_CM, "Change cm_node state to TSA\n");
|
|
cm_node->state = NES_CM_STATE_TSA;
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_cm_disconn
|
|
*/
|
|
int nes_cm_disconn(struct nes_qp *nesqp)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&nesqp->lock, flags);
|
|
if (nesqp->disconn_pending == 0) {
|
|
nesqp->disconn_pending++;
|
|
spin_unlock_irqrestore(&nesqp->lock, flags);
|
|
/* init our disconnect work element, to */
|
|
INIT_WORK(&nesqp->disconn_work, nes_disconnect_worker);
|
|
|
|
queue_work(g_cm_core->disconn_wq, &nesqp->disconn_work);
|
|
} else
|
|
spin_unlock_irqrestore(&nesqp->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_disconnect_worker
|
|
*/
|
|
static void nes_disconnect_worker(struct work_struct *work)
|
|
{
|
|
struct nes_qp *nesqp = container_of(work, struct nes_qp, disconn_work);
|
|
|
|
nes_debug(NES_DBG_CM, "processing AEQE id 0x%04X for QP%u.\n",
|
|
nesqp->last_aeq, nesqp->hwqp.qp_id);
|
|
nes_cm_disconn_true(nesqp);
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_cm_disconn_true
|
|
*/
|
|
static int nes_cm_disconn_true(struct nes_qp *nesqp)
|
|
{
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
struct iw_cm_id *cm_id;
|
|
struct iw_cm_event cm_event;
|
|
struct nes_vnic *nesvnic;
|
|
u16 last_ae;
|
|
u8 original_hw_tcp_state;
|
|
u8 original_ibqp_state;
|
|
u8 issued_disconnect_reset = 0;
|
|
|
|
if (!nesqp) {
|
|
nes_debug(NES_DBG_CM, "disconnect_worker nesqp is NULL\n");
|
|
return -1;
|
|
}
|
|
|
|
spin_lock_irqsave(&nesqp->lock, flags);
|
|
cm_id = nesqp->cm_id;
|
|
/* make sure we havent already closed this connection */
|
|
if (!cm_id) {
|
|
nes_debug(NES_DBG_CM, "QP%u disconnect_worker cmid is NULL\n",
|
|
nesqp->hwqp.qp_id);
|
|
spin_unlock_irqrestore(&nesqp->lock, flags);
|
|
return -1;
|
|
}
|
|
|
|
nesvnic = to_nesvnic(nesqp->ibqp.device);
|
|
nes_debug(NES_DBG_CM, "Disconnecting QP%u\n", nesqp->hwqp.qp_id);
|
|
|
|
original_hw_tcp_state = nesqp->hw_tcp_state;
|
|
original_ibqp_state = nesqp->ibqp_state;
|
|
last_ae = nesqp->last_aeq;
|
|
|
|
|
|
nes_debug(NES_DBG_CM, "set ibqp_state=%u\n", nesqp->ibqp_state);
|
|
|
|
if ((nesqp->cm_id) && (cm_id->event_handler)) {
|
|
if ((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSE_WAIT) ||
|
|
((original_ibqp_state == IB_QPS_RTS) &&
|
|
(last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
|
|
atomic_inc(&cm_disconnects);
|
|
cm_event.event = IW_CM_EVENT_DISCONNECT;
|
|
if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) {
|
|
cm_event.status = IW_CM_EVENT_STATUS_RESET;
|
|
nes_debug(NES_DBG_CM, "Generating a CM "
|
|
"Disconnect Event (status reset) for "
|
|
"QP%u, cm_id = %p. \n",
|
|
nesqp->hwqp.qp_id, cm_id);
|
|
} else
|
|
cm_event.status = IW_CM_EVENT_STATUS_OK;
|
|
|
|
cm_event.local_addr = cm_id->local_addr;
|
|
cm_event.remote_addr = cm_id->remote_addr;
|
|
cm_event.private_data = NULL;
|
|
cm_event.private_data_len = 0;
|
|
|
|
nes_debug(NES_DBG_CM, "Generating a CM Disconnect Event"
|
|
" for QP%u, SQ Head = %u, SQ Tail = %u. "
|
|
"cm_id = %p, refcount = %u.\n",
|
|
nesqp->hwqp.qp_id, nesqp->hwqp.sq_head,
|
|
nesqp->hwqp.sq_tail, cm_id,
|
|
atomic_read(&nesqp->refcount));
|
|
|
|
spin_unlock_irqrestore(&nesqp->lock, flags);
|
|
ret = cm_id->event_handler(cm_id, &cm_event);
|
|
if (ret)
|
|
nes_debug(NES_DBG_CM, "OFA CM event_handler "
|
|
"returned, ret=%d\n", ret);
|
|
spin_lock_irqsave(&nesqp->lock, flags);
|
|
}
|
|
|
|
nesqp->disconn_pending = 0;
|
|
/* There might have been another AE while the lock was released */
|
|
original_hw_tcp_state = nesqp->hw_tcp_state;
|
|
original_ibqp_state = nesqp->ibqp_state;
|
|
last_ae = nesqp->last_aeq;
|
|
|
|
if ((issued_disconnect_reset == 0) && (nesqp->cm_id) &&
|
|
((original_hw_tcp_state == NES_AEQE_TCP_STATE_CLOSED) ||
|
|
(original_hw_tcp_state == NES_AEQE_TCP_STATE_TIME_WAIT) ||
|
|
(last_ae == NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) ||
|
|
(last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET))) {
|
|
atomic_inc(&cm_closes);
|
|
nesqp->cm_id = NULL;
|
|
nesqp->in_disconnect = 0;
|
|
spin_unlock_irqrestore(&nesqp->lock, flags);
|
|
nes_disconnect(nesqp, 1);
|
|
|
|
cm_id->provider_data = nesqp;
|
|
/* Send up the close complete event */
|
|
cm_event.event = IW_CM_EVENT_CLOSE;
|
|
cm_event.status = IW_CM_EVENT_STATUS_OK;
|
|
cm_event.provider_data = cm_id->provider_data;
|
|
cm_event.local_addr = cm_id->local_addr;
|
|
cm_event.remote_addr = cm_id->remote_addr;
|
|
cm_event.private_data = NULL;
|
|
cm_event.private_data_len = 0;
|
|
|
|
ret = cm_id->event_handler(cm_id, &cm_event);
|
|
if (ret) {
|
|
nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
|
|
}
|
|
|
|
cm_id->rem_ref(cm_id);
|
|
|
|
spin_lock_irqsave(&nesqp->lock, flags);
|
|
if (nesqp->flush_issued == 0) {
|
|
nesqp->flush_issued = 1;
|
|
spin_unlock_irqrestore(&nesqp->lock, flags);
|
|
flush_wqes(nesvnic->nesdev, nesqp,
|
|
NES_CQP_FLUSH_RQ, 1);
|
|
} else
|
|
spin_unlock_irqrestore(&nesqp->lock, flags);
|
|
} else {
|
|
cm_id = nesqp->cm_id;
|
|
spin_unlock_irqrestore(&nesqp->lock, flags);
|
|
/* check to see if the inbound reset beat the outbound reset */
|
|
if ((!cm_id) && (last_ae==NES_AEQE_AEID_RESET_SENT)) {
|
|
nes_debug(NES_DBG_CM, "QP%u: Decing refcount "
|
|
"due to inbound reset beating the "
|
|
"outbound reset.\n", nesqp->hwqp.qp_id);
|
|
}
|
|
}
|
|
} else {
|
|
nesqp->disconn_pending = 0;
|
|
spin_unlock_irqrestore(&nesqp->lock, flags);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_disconnect
|
|
*/
|
|
static int nes_disconnect(struct nes_qp *nesqp, int abrupt)
|
|
{
|
|
int ret = 0;
|
|
struct nes_vnic *nesvnic;
|
|
struct nes_device *nesdev;
|
|
|
|
nesvnic = to_nesvnic(nesqp->ibqp.device);
|
|
if (!nesvnic)
|
|
return -EINVAL;
|
|
|
|
nesdev = nesvnic->nesdev;
|
|
|
|
nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
|
|
atomic_read(&nesvnic->netdev->refcnt));
|
|
|
|
if (nesqp->active_conn) {
|
|
|
|
/* indicate this connection is NOT active */
|
|
nesqp->active_conn = 0;
|
|
} else {
|
|
/* Need to free the Last Streaming Mode Message */
|
|
if (nesqp->ietf_frame) {
|
|
pci_free_consistent(nesdev->pcidev,
|
|
nesqp->private_data_len+sizeof(struct ietf_mpa_frame),
|
|
nesqp->ietf_frame, nesqp->ietf_frame_pbase);
|
|
}
|
|
}
|
|
|
|
/* close the CM node down if it is still active */
|
|
if (nesqp->cm_node) {
|
|
nes_debug(NES_DBG_CM, "Call close API\n");
|
|
|
|
g_cm_core->api->close(g_cm_core, nesqp->cm_node);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_accept
|
|
*/
|
|
int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
|
|
{
|
|
u64 u64temp;
|
|
struct ib_qp *ibqp;
|
|
struct nes_qp *nesqp;
|
|
struct nes_vnic *nesvnic;
|
|
struct nes_device *nesdev;
|
|
struct nes_cm_node *cm_node;
|
|
struct nes_adapter *adapter;
|
|
struct ib_qp_attr attr;
|
|
struct iw_cm_event cm_event;
|
|
struct nes_hw_qp_wqe *wqe;
|
|
struct nes_v4_quad nes_quad;
|
|
u32 crc_value;
|
|
int ret;
|
|
int passive_state;
|
|
|
|
ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
|
|
if (!ibqp)
|
|
return -EINVAL;
|
|
|
|
/* get all our handles */
|
|
nesqp = to_nesqp(ibqp);
|
|
nesvnic = to_nesvnic(nesqp->ibqp.device);
|
|
nesdev = nesvnic->nesdev;
|
|
adapter = nesdev->nesadapter;
|
|
|
|
cm_node = (struct nes_cm_node *)cm_id->provider_data;
|
|
nes_debug(NES_DBG_CM, "nes_accept: cm_node= %p nesvnic=%p, netdev=%p,"
|
|
"%s\n", cm_node, nesvnic, nesvnic->netdev,
|
|
nesvnic->netdev->name);
|
|
|
|
/* associate the node with the QP */
|
|
nesqp->cm_node = (void *)cm_node;
|
|
cm_node->nesqp = nesqp;
|
|
nes_add_ref(&nesqp->ibqp);
|
|
|
|
nes_debug(NES_DBG_CM, "QP%u, cm_node=%p, jiffies = %lu listener = %p\n",
|
|
nesqp->hwqp.qp_id, cm_node, jiffies, cm_node->listener);
|
|
atomic_inc(&cm_accepts);
|
|
|
|
nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n",
|
|
atomic_read(&nesvnic->netdev->refcnt));
|
|
|
|
/* allocate the ietf frame and space for private data */
|
|
nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev,
|
|
sizeof(struct ietf_mpa_frame) + conn_param->private_data_len,
|
|
&nesqp->ietf_frame_pbase);
|
|
|
|
if (!nesqp->ietf_frame) {
|
|
nes_debug(NES_DBG_CM, "Unable to allocate memory for private "
|
|
"data\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
|
|
/* setup the MPA frame */
|
|
nesqp->private_data_len = conn_param->private_data_len;
|
|
memcpy(nesqp->ietf_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE);
|
|
|
|
memcpy(nesqp->ietf_frame->priv_data, conn_param->private_data,
|
|
conn_param->private_data_len);
|
|
|
|
nesqp->ietf_frame->priv_data_len =
|
|
cpu_to_be16(conn_param->private_data_len);
|
|
nesqp->ietf_frame->rev = mpa_version;
|
|
nesqp->ietf_frame->flags = IETF_MPA_FLAGS_CRC;
|
|
|
|
/* setup our first outgoing iWarp send WQE (the IETF frame response) */
|
|
wqe = &nesqp->hwqp.sq_vbase[0];
|
|
|
|
if (cm_id->remote_addr.sin_addr.s_addr !=
|
|
cm_id->local_addr.sin_addr.s_addr) {
|
|
u64temp = (unsigned long)nesqp;
|
|
u64temp |= NES_SW_CONTEXT_ALIGN>>1;
|
|
set_wqe_64bit_value(wqe->wqe_words,
|
|
NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX,
|
|
u64temp);
|
|
wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
|
|
cpu_to_le32(NES_IWARP_SQ_WQE_STREAMING |
|
|
NES_IWARP_SQ_WQE_WRPDU);
|
|
wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] =
|
|
cpu_to_le32(conn_param->private_data_len +
|
|
sizeof(struct ietf_mpa_frame));
|
|
wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] =
|
|
cpu_to_le32((u32)nesqp->ietf_frame_pbase);
|
|
wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] =
|
|
cpu_to_le32((u32)((u64)nesqp->ietf_frame_pbase >> 32));
|
|
wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] =
|
|
cpu_to_le32(conn_param->private_data_len +
|
|
sizeof(struct ietf_mpa_frame));
|
|
wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
|
|
|
|
nesqp->nesqp_context->ird_ord_sizes |=
|
|
cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
|
|
NES_QPCONTEXT_ORDIRD_WRPDU);
|
|
} else {
|
|
nesqp->nesqp_context->ird_ord_sizes |=
|
|
cpu_to_le32((NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
|
|
NES_QPCONTEXT_ORDIRD_WRPDU |
|
|
NES_QPCONTEXT_ORDIRD_ALSMM));
|
|
}
|
|
nesqp->skip_lsmm = 1;
|
|
|
|
|
|
/* Cache the cm_id in the qp */
|
|
nesqp->cm_id = cm_id;
|
|
cm_node->cm_id = cm_id;
|
|
|
|
/* nesqp->cm_node = (void *)cm_id->provider_data; */
|
|
cm_id->provider_data = nesqp;
|
|
nesqp->active_conn = 0;
|
|
|
|
if (cm_node->state == NES_CM_STATE_TSA)
|
|
nes_debug(NES_DBG_CM, "Already state = TSA for cm_node=%p\n",
|
|
cm_node);
|
|
|
|
nes_cm_init_tsa_conn(nesqp, cm_node);
|
|
|
|
nesqp->nesqp_context->tcpPorts[0] =
|
|
cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
|
|
nesqp->nesqp_context->tcpPorts[1] =
|
|
cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
|
|
|
|
if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
|
|
nesqp->nesqp_context->ip0 =
|
|
cpu_to_le32(ntohl(nesvnic->local_ipaddr));
|
|
else
|
|
nesqp->nesqp_context->ip0 =
|
|
cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
|
|
|
|
nesqp->nesqp_context->misc2 |= cpu_to_le32(
|
|
(u32)PCI_FUNC(nesdev->pcidev->devfn) <<
|
|
NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
|
|
|
|
nesqp->nesqp_context->arp_index_vlan |=
|
|
cpu_to_le32(nes_arp_table(nesdev,
|
|
le32_to_cpu(nesqp->nesqp_context->ip0), NULL,
|
|
NES_ARP_RESOLVE) << 16);
|
|
|
|
nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
|
|
jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
|
|
|
|
nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
|
|
|
|
nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(
|
|
((u32)1 << NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT));
|
|
nesqp->nesqp_context->ird_ord_sizes |=
|
|
cpu_to_le32((u32)conn_param->ord);
|
|
|
|
memset(&nes_quad, 0, sizeof(nes_quad));
|
|
nes_quad.DstIpAdrIndex =
|
|
cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
|
|
if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
|
|
nes_quad.SrcIpadr = nesvnic->local_ipaddr;
|
|
else
|
|
nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
|
|
nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
|
|
nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
|
|
|
|
/* Produce hash key */
|
|
crc_value = get_crc_value(&nes_quad);
|
|
nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
|
|
nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
|
|
nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
|
|
|
|
nesqp->hte_index &= adapter->hte_index_mask;
|
|
nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
|
|
|
|
cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
|
|
|
|
nes_debug(NES_DBG_CM, "QP%u, Destination IP = 0x%08X:0x%04X, local = "
|
|
"0x%08X:0x%04X, rcv_nxt=0x%08X, snd_nxt=0x%08X, mpa + "
|
|
"private data length=%zu.\n", nesqp->hwqp.qp_id,
|
|
ntohl(cm_id->remote_addr.sin_addr.s_addr),
|
|
ntohs(cm_id->remote_addr.sin_port),
|
|
ntohl(cm_id->local_addr.sin_addr.s_addr),
|
|
ntohs(cm_id->local_addr.sin_port),
|
|
le32_to_cpu(nesqp->nesqp_context->rcv_nxt),
|
|
le32_to_cpu(nesqp->nesqp_context->snd_nxt),
|
|
conn_param->private_data_len +
|
|
sizeof(struct ietf_mpa_frame));
|
|
|
|
|
|
/* notify OF layer that accept event was successful */
|
|
cm_id->add_ref(cm_id);
|
|
|
|
cm_event.event = IW_CM_EVENT_ESTABLISHED;
|
|
cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
|
|
cm_event.provider_data = (void *)nesqp;
|
|
cm_event.local_addr = cm_id->local_addr;
|
|
cm_event.remote_addr = cm_id->remote_addr;
|
|
cm_event.private_data = NULL;
|
|
cm_event.private_data_len = 0;
|
|
ret = cm_id->event_handler(cm_id, &cm_event);
|
|
attr.qp_state = IB_QPS_RTS;
|
|
nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
|
|
if (cm_node->loopbackpartner) {
|
|
cm_node->loopbackpartner->mpa_frame_size =
|
|
nesqp->private_data_len;
|
|
/* copy entire MPA frame to our cm_node's frame */
|
|
memcpy(cm_node->loopbackpartner->mpa_frame_buf,
|
|
nesqp->ietf_frame->priv_data, nesqp->private_data_len);
|
|
create_event(cm_node->loopbackpartner, NES_CM_EVENT_CONNECTED);
|
|
}
|
|
if (ret)
|
|
printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
|
|
"ret=%d\n", __func__, __LINE__, ret);
|
|
|
|
passive_state = atomic_add_return(1, &cm_node->passive_state);
|
|
if (passive_state == NES_SEND_RESET_EVENT)
|
|
create_event(cm_node, NES_CM_EVENT_RESET);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_reject
|
|
*/
|
|
int nes_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
|
|
{
|
|
struct nes_cm_node *cm_node;
|
|
struct nes_cm_core *cm_core;
|
|
|
|
atomic_inc(&cm_rejects);
|
|
cm_node = (struct nes_cm_node *) cm_id->provider_data;
|
|
cm_core = cm_node->cm_core;
|
|
cm_node->mpa_frame_size = sizeof(struct ietf_mpa_frame) + pdata_len;
|
|
|
|
strcpy(&cm_node->mpa_frame.key[0], IEFT_MPA_KEY_REP);
|
|
memcpy(&cm_node->mpa_frame.priv_data, pdata, pdata_len);
|
|
|
|
cm_node->mpa_frame.priv_data_len = cpu_to_be16(pdata_len);
|
|
cm_node->mpa_frame.rev = mpa_version;
|
|
cm_node->mpa_frame.flags = IETF_MPA_FLAGS_CRC | IETF_MPA_FLAGS_REJECT;
|
|
|
|
cm_core->api->reject(cm_core, &cm_node->mpa_frame, cm_node);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_connect
|
|
* setup and launch cm connect node
|
|
*/
|
|
int nes_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
|
|
{
|
|
struct ib_qp *ibqp;
|
|
struct nes_qp *nesqp;
|
|
struct nes_vnic *nesvnic;
|
|
struct nes_device *nesdev;
|
|
struct nes_cm_node *cm_node;
|
|
struct nes_cm_info cm_info;
|
|
|
|
ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
|
|
if (!ibqp)
|
|
return -EINVAL;
|
|
nesqp = to_nesqp(ibqp);
|
|
if (!nesqp)
|
|
return -EINVAL;
|
|
nesvnic = to_nesvnic(nesqp->ibqp.device);
|
|
if (!nesvnic)
|
|
return -EINVAL;
|
|
nesdev = nesvnic->nesdev;
|
|
if (!nesdev)
|
|
return -EINVAL;
|
|
|
|
nes_debug(NES_DBG_CM, "QP%u, current IP = 0x%08X, Destination IP = "
|
|
"0x%08X:0x%04X, local = 0x%08X:0x%04X.\n", nesqp->hwqp.qp_id,
|
|
ntohl(nesvnic->local_ipaddr),
|
|
ntohl(cm_id->remote_addr.sin_addr.s_addr),
|
|
ntohs(cm_id->remote_addr.sin_port),
|
|
ntohl(cm_id->local_addr.sin_addr.s_addr),
|
|
ntohs(cm_id->local_addr.sin_port));
|
|
|
|
atomic_inc(&cm_connects);
|
|
nesqp->active_conn = 1;
|
|
|
|
/* cache the cm_id in the qp */
|
|
nesqp->cm_id = cm_id;
|
|
|
|
cm_id->provider_data = nesqp;
|
|
|
|
nesqp->private_data_len = conn_param->private_data_len;
|
|
nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32((u32)conn_param->ord);
|
|
nes_debug(NES_DBG_CM, "requested ord = 0x%08X.\n", (u32)conn_param->ord);
|
|
nes_debug(NES_DBG_CM, "mpa private data len =%u\n",
|
|
conn_param->private_data_len);
|
|
|
|
if (cm_id->local_addr.sin_addr.s_addr !=
|
|
cm_id->remote_addr.sin_addr.s_addr)
|
|
nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
|
|
PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD);
|
|
|
|
/* set up the connection params for the node */
|
|
cm_info.loc_addr = htonl(cm_id->local_addr.sin_addr.s_addr);
|
|
cm_info.loc_port = htons(cm_id->local_addr.sin_port);
|
|
cm_info.rem_addr = htonl(cm_id->remote_addr.sin_addr.s_addr);
|
|
cm_info.rem_port = htons(cm_id->remote_addr.sin_port);
|
|
cm_info.cm_id = cm_id;
|
|
cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
|
|
|
|
cm_id->add_ref(cm_id);
|
|
|
|
/* create a connect CM node connection */
|
|
cm_node = g_cm_core->api->connect(g_cm_core, nesvnic,
|
|
conn_param->private_data_len, (void *)conn_param->private_data,
|
|
&cm_info);
|
|
if (!cm_node) {
|
|
if (cm_id->local_addr.sin_addr.s_addr !=
|
|
cm_id->remote_addr.sin_addr.s_addr)
|
|
nes_manage_apbvt(nesvnic, ntohs(cm_id->local_addr.sin_port),
|
|
PCI_FUNC(nesdev->pcidev->devfn),
|
|
NES_MANAGE_APBVT_DEL);
|
|
|
|
cm_id->rem_ref(cm_id);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
cm_node->apbvt_set = 1;
|
|
nesqp->cm_node = cm_node;
|
|
cm_node->nesqp = nesqp;
|
|
nes_add_ref(&nesqp->ibqp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_create_listen
|
|
*/
|
|
int nes_create_listen(struct iw_cm_id *cm_id, int backlog)
|
|
{
|
|
struct nes_vnic *nesvnic;
|
|
struct nes_cm_listener *cm_node;
|
|
struct nes_cm_info cm_info;
|
|
struct nes_adapter *adapter;
|
|
int err;
|
|
|
|
|
|
nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n",
|
|
cm_id, ntohs(cm_id->local_addr.sin_port));
|
|
|
|
nesvnic = to_nesvnic(cm_id->device);
|
|
if (!nesvnic)
|
|
return -EINVAL;
|
|
adapter = nesvnic->nesdev->nesadapter;
|
|
nes_debug(NES_DBG_CM, "nesvnic=%p, netdev=%p, %s\n",
|
|
nesvnic, nesvnic->netdev, nesvnic->netdev->name);
|
|
|
|
nes_debug(NES_DBG_CM, "nesvnic->local_ipaddr=0x%08x, sin_addr.s_addr=0x%08x\n",
|
|
nesvnic->local_ipaddr, cm_id->local_addr.sin_addr.s_addr);
|
|
|
|
/* setup listen params in our api call struct */
|
|
cm_info.loc_addr = nesvnic->local_ipaddr;
|
|
cm_info.loc_port = cm_id->local_addr.sin_port;
|
|
cm_info.backlog = backlog;
|
|
cm_info.cm_id = cm_id;
|
|
|
|
cm_info.conn_type = NES_CM_IWARP_CONN_TYPE;
|
|
|
|
|
|
cm_node = g_cm_core->api->listen(g_cm_core, nesvnic, &cm_info);
|
|
if (!cm_node) {
|
|
printk(KERN_ERR "%s[%u] Error returned from listen API call\n",
|
|
__func__, __LINE__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
cm_id->provider_data = cm_node;
|
|
|
|
if (!cm_node->reused_node) {
|
|
err = nes_manage_apbvt(nesvnic,
|
|
ntohs(cm_id->local_addr.sin_port),
|
|
PCI_FUNC(nesvnic->nesdev->pcidev->devfn),
|
|
NES_MANAGE_APBVT_ADD);
|
|
if (err) {
|
|
printk(KERN_ERR "nes_manage_apbvt call returned %d.\n",
|
|
err);
|
|
g_cm_core->api->stop_listener(g_cm_core, (void *)cm_node);
|
|
return err;
|
|
}
|
|
cm_listens_created++;
|
|
}
|
|
|
|
cm_id->add_ref(cm_id);
|
|
cm_id->provider_data = (void *)cm_node;
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_destroy_listen
|
|
*/
|
|
int nes_destroy_listen(struct iw_cm_id *cm_id)
|
|
{
|
|
if (cm_id->provider_data)
|
|
g_cm_core->api->stop_listener(g_cm_core, cm_id->provider_data);
|
|
else
|
|
nes_debug(NES_DBG_CM, "cm_id->provider_data was NULL\n");
|
|
|
|
cm_id->rem_ref(cm_id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_cm_recv
|
|
*/
|
|
int nes_cm_recv(struct sk_buff *skb, struct net_device *netdevice)
|
|
{
|
|
int rc = 0;
|
|
cm_packets_received++;
|
|
if ((g_cm_core) && (g_cm_core->api)) {
|
|
rc = g_cm_core->api->recv_pkt(g_cm_core, netdev_priv(netdevice), skb);
|
|
} else {
|
|
nes_debug(NES_DBG_CM, "Unable to process packet for CM,"
|
|
" cm is not setup properly.\n");
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_cm_start
|
|
* Start and init a cm core module
|
|
*/
|
|
int nes_cm_start(void)
|
|
{
|
|
nes_debug(NES_DBG_CM, "\n");
|
|
/* create the primary CM core, pass this handle to subsequent core inits */
|
|
g_cm_core = nes_cm_alloc_core();
|
|
if (g_cm_core) {
|
|
return 0;
|
|
} else {
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_cm_stop
|
|
* stop and dealloc all cm core instances
|
|
*/
|
|
int nes_cm_stop(void)
|
|
{
|
|
g_cm_core->api->destroy_cm_core(g_cm_core);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* cm_event_connected
|
|
* handle a connected event, setup QPs and HW
|
|
*/
|
|
static void cm_event_connected(struct nes_cm_event *event)
|
|
{
|
|
u64 u64temp;
|
|
struct nes_qp *nesqp;
|
|
struct nes_vnic *nesvnic;
|
|
struct nes_device *nesdev;
|
|
struct nes_cm_node *cm_node;
|
|
struct nes_adapter *nesadapter;
|
|
struct ib_qp_attr attr;
|
|
struct iw_cm_id *cm_id;
|
|
struct iw_cm_event cm_event;
|
|
struct nes_hw_qp_wqe *wqe;
|
|
struct nes_v4_quad nes_quad;
|
|
u32 crc_value;
|
|
int ret;
|
|
|
|
/* get all our handles */
|
|
cm_node = event->cm_node;
|
|
cm_id = cm_node->cm_id;
|
|
nes_debug(NES_DBG_CM, "cm_event_connected - %p - cm_id = %p\n", cm_node, cm_id);
|
|
nesqp = (struct nes_qp *)cm_id->provider_data;
|
|
nesvnic = to_nesvnic(nesqp->ibqp.device);
|
|
nesdev = nesvnic->nesdev;
|
|
nesadapter = nesdev->nesadapter;
|
|
|
|
if (nesqp->destroyed) {
|
|
return;
|
|
}
|
|
atomic_inc(&cm_connecteds);
|
|
nes_debug(NES_DBG_CM, "QP%u attempting to connect to 0x%08X:0x%04X on"
|
|
" local port 0x%04X. jiffies = %lu.\n",
|
|
nesqp->hwqp.qp_id,
|
|
ntohl(cm_id->remote_addr.sin_addr.s_addr),
|
|
ntohs(cm_id->remote_addr.sin_port),
|
|
ntohs(cm_id->local_addr.sin_port),
|
|
jiffies);
|
|
|
|
nes_cm_init_tsa_conn(nesqp, cm_node);
|
|
|
|
/* set the QP tsa context */
|
|
nesqp->nesqp_context->tcpPorts[0] =
|
|
cpu_to_le16(ntohs(cm_id->local_addr.sin_port));
|
|
nesqp->nesqp_context->tcpPorts[1] =
|
|
cpu_to_le16(ntohs(cm_id->remote_addr.sin_port));
|
|
if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
|
|
nesqp->nesqp_context->ip0 =
|
|
cpu_to_le32(ntohl(nesvnic->local_ipaddr));
|
|
else
|
|
nesqp->nesqp_context->ip0 =
|
|
cpu_to_le32(ntohl(cm_id->remote_addr.sin_addr.s_addr));
|
|
|
|
nesqp->nesqp_context->misc2 |= cpu_to_le32(
|
|
(u32)PCI_FUNC(nesdev->pcidev->devfn) <<
|
|
NES_QPCONTEXT_MISC2_SRC_IP_SHIFT);
|
|
nesqp->nesqp_context->arp_index_vlan |= cpu_to_le32(
|
|
nes_arp_table(nesdev,
|
|
le32_to_cpu(nesqp->nesqp_context->ip0),
|
|
NULL, NES_ARP_RESOLVE) << 16);
|
|
nesqp->nesqp_context->ts_val_delta = cpu_to_le32(
|
|
jiffies - nes_read_indexed(nesdev, NES_IDX_TCP_NOW));
|
|
nesqp->nesqp_context->ird_index = cpu_to_le32(nesqp->hwqp.qp_id);
|
|
nesqp->nesqp_context->ird_ord_sizes |=
|
|
cpu_to_le32((u32)1 <<
|
|
NES_QPCONTEXT_ORDIRD_IWARP_MODE_SHIFT);
|
|
|
|
/* Adjust tail for not having a LSMM */
|
|
nesqp->hwqp.sq_tail = 1;
|
|
|
|
#if defined(NES_SEND_FIRST_WRITE)
|
|
if (cm_node->send_write0) {
|
|
nes_debug(NES_DBG_CM, "Sending first write.\n");
|
|
wqe = &nesqp->hwqp.sq_vbase[0];
|
|
u64temp = (unsigned long)nesqp;
|
|
u64temp |= NES_SW_CONTEXT_ALIGN>>1;
|
|
set_wqe_64bit_value(wqe->wqe_words,
|
|
NES_IWARP_SQ_WQE_COMP_CTX_LOW_IDX, u64temp);
|
|
wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] =
|
|
cpu_to_le32(NES_IWARP_SQ_OP_RDMAW);
|
|
wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX] = 0;
|
|
wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_LOW_IDX] = 0;
|
|
wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0;
|
|
wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
|
|
wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
|
|
|
|
/* use the reserved spot on the WQ for the extra first WQE */
|
|
nesqp->nesqp_context->ird_ord_sizes &=
|
|
cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
|
|
NES_QPCONTEXT_ORDIRD_WRPDU |
|
|
NES_QPCONTEXT_ORDIRD_ALSMM));
|
|
nesqp->skip_lsmm = 1;
|
|
nesqp->hwqp.sq_tail = 0;
|
|
nes_write32(nesdev->regs + NES_WQE_ALLOC,
|
|
(1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
|
|
}
|
|
#endif
|
|
|
|
memset(&nes_quad, 0, sizeof(nes_quad));
|
|
|
|
nes_quad.DstIpAdrIndex =
|
|
cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
|
|
if (ipv4_is_loopback(cm_id->remote_addr.sin_addr.s_addr))
|
|
nes_quad.SrcIpadr = nesvnic->local_ipaddr;
|
|
else
|
|
nes_quad.SrcIpadr = cm_id->remote_addr.sin_addr.s_addr;
|
|
nes_quad.TcpPorts[0] = cm_id->remote_addr.sin_port;
|
|
nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
|
|
|
|
/* Produce hash key */
|
|
crc_value = get_crc_value(&nes_quad);
|
|
nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
|
|
nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
|
|
nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
|
|
|
|
nesqp->hte_index &= nesadapter->hte_index_mask;
|
|
nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
|
|
|
|
nesqp->ietf_frame = &cm_node->mpa_frame;
|
|
nesqp->private_data_len = (u8) cm_node->mpa_frame_size;
|
|
cm_node->cm_core->api->accelerated(cm_node->cm_core, cm_node);
|
|
|
|
/* notify OF layer we successfully created the requested connection */
|
|
cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
|
|
cm_event.status = IW_CM_EVENT_STATUS_ACCEPTED;
|
|
cm_event.provider_data = cm_id->provider_data;
|
|
cm_event.local_addr.sin_family = AF_INET;
|
|
cm_event.local_addr.sin_port = cm_id->local_addr.sin_port;
|
|
cm_event.remote_addr = cm_id->remote_addr;
|
|
|
|
cm_event.private_data = (void *)event->cm_node->mpa_frame_buf;
|
|
cm_event.private_data_len = (u8) event->cm_node->mpa_frame_size;
|
|
|
|
cm_event.local_addr.sin_addr.s_addr = event->cm_info.rem_addr;
|
|
ret = cm_id->event_handler(cm_id, &cm_event);
|
|
nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
|
|
|
|
if (ret)
|
|
printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
|
|
"ret=%d\n", __func__, __LINE__, ret);
|
|
attr.qp_state = IB_QPS_RTS;
|
|
nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
|
|
|
|
nes_debug(NES_DBG_CM, "Exiting connect thread for QP%u. jiffies = "
|
|
"%lu\n", nesqp->hwqp.qp_id, jiffies);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/**
|
|
* cm_event_connect_error
|
|
*/
|
|
static void cm_event_connect_error(struct nes_cm_event *event)
|
|
{
|
|
struct nes_qp *nesqp;
|
|
struct iw_cm_id *cm_id;
|
|
struct iw_cm_event cm_event;
|
|
/* struct nes_cm_info cm_info; */
|
|
int ret;
|
|
|
|
if (!event->cm_node)
|
|
return;
|
|
|
|
cm_id = event->cm_node->cm_id;
|
|
if (!cm_id) {
|
|
return;
|
|
}
|
|
|
|
nes_debug(NES_DBG_CM, "cm_node=%p, cm_id=%p\n", event->cm_node, cm_id);
|
|
nesqp = cm_id->provider_data;
|
|
|
|
if (!nesqp) {
|
|
return;
|
|
}
|
|
|
|
/* notify OF layer about this connection error event */
|
|
/* cm_id->rem_ref(cm_id); */
|
|
nesqp->cm_id = NULL;
|
|
cm_id->provider_data = NULL;
|
|
cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
|
|
cm_event.status = IW_CM_EVENT_STATUS_REJECTED;
|
|
cm_event.provider_data = cm_id->provider_data;
|
|
cm_event.local_addr = cm_id->local_addr;
|
|
cm_event.remote_addr = cm_id->remote_addr;
|
|
cm_event.private_data = NULL;
|
|
cm_event.private_data_len = 0;
|
|
|
|
nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, "
|
|
"remove_addr=%08x\n", cm_event.local_addr.sin_addr.s_addr,
|
|
cm_event.remote_addr.sin_addr.s_addr);
|
|
|
|
ret = cm_id->event_handler(cm_id, &cm_event);
|
|
nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
|
|
if (ret)
|
|
printk(KERN_ERR "%s[%u] OFA CM event_handler returned, "
|
|
"ret=%d\n", __func__, __LINE__, ret);
|
|
cm_id->rem_ref(cm_id);
|
|
|
|
rem_ref_cm_node(event->cm_node->cm_core, event->cm_node);
|
|
return;
|
|
}
|
|
|
|
|
|
/**
|
|
* cm_event_reset
|
|
*/
|
|
static void cm_event_reset(struct nes_cm_event *event)
|
|
{
|
|
struct nes_qp *nesqp;
|
|
struct iw_cm_id *cm_id;
|
|
struct iw_cm_event cm_event;
|
|
/* struct nes_cm_info cm_info; */
|
|
int ret;
|
|
|
|
if (!event->cm_node)
|
|
return;
|
|
|
|
if (!event->cm_node->cm_id)
|
|
return;
|
|
|
|
cm_id = event->cm_node->cm_id;
|
|
|
|
nes_debug(NES_DBG_CM, "%p - cm_id = %p\n", event->cm_node, cm_id);
|
|
nesqp = cm_id->provider_data;
|
|
|
|
nesqp->cm_id = NULL;
|
|
/* cm_id->provider_data = NULL; */
|
|
cm_event.event = IW_CM_EVENT_DISCONNECT;
|
|
cm_event.status = IW_CM_EVENT_STATUS_RESET;
|
|
cm_event.provider_data = cm_id->provider_data;
|
|
cm_event.local_addr = cm_id->local_addr;
|
|
cm_event.remote_addr = cm_id->remote_addr;
|
|
cm_event.private_data = NULL;
|
|
cm_event.private_data_len = 0;
|
|
|
|
ret = cm_id->event_handler(cm_id, &cm_event);
|
|
cm_id->add_ref(cm_id);
|
|
atomic_inc(&cm_closes);
|
|
cm_event.event = IW_CM_EVENT_CLOSE;
|
|
cm_event.status = IW_CM_EVENT_STATUS_OK;
|
|
cm_event.provider_data = cm_id->provider_data;
|
|
cm_event.local_addr = cm_id->local_addr;
|
|
cm_event.remote_addr = cm_id->remote_addr;
|
|
cm_event.private_data = NULL;
|
|
cm_event.private_data_len = 0;
|
|
nes_debug(NES_DBG_CM, "NODE %p Generating CLOSE\n", event->cm_node);
|
|
ret = cm_id->event_handler(cm_id, &cm_event);
|
|
|
|
nes_debug(NES_DBG_CM, "OFA CM event_handler returned, ret=%d\n", ret);
|
|
|
|
|
|
/* notify OF layer about this connection error event */
|
|
cm_id->rem_ref(cm_id);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/**
|
|
* cm_event_mpa_req
|
|
*/
|
|
static void cm_event_mpa_req(struct nes_cm_event *event)
|
|
{
|
|
struct iw_cm_id *cm_id;
|
|
struct iw_cm_event cm_event;
|
|
int ret;
|
|
struct nes_cm_node *cm_node;
|
|
|
|
cm_node = event->cm_node;
|
|
if (!cm_node)
|
|
return;
|
|
cm_id = cm_node->cm_id;
|
|
|
|
atomic_inc(&cm_connect_reqs);
|
|
nes_debug(NES_DBG_CM, "cm_node = %p - cm_id = %p, jiffies = %lu\n",
|
|
cm_node, cm_id, jiffies);
|
|
|
|
cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
|
|
cm_event.status = IW_CM_EVENT_STATUS_OK;
|
|
cm_event.provider_data = (void *)cm_node;
|
|
|
|
cm_event.local_addr.sin_family = AF_INET;
|
|
cm_event.local_addr.sin_port = htons(event->cm_info.loc_port);
|
|
cm_event.local_addr.sin_addr.s_addr = htonl(event->cm_info.loc_addr);
|
|
|
|
cm_event.remote_addr.sin_family = AF_INET;
|
|
cm_event.remote_addr.sin_port = htons(event->cm_info.rem_port);
|
|
cm_event.remote_addr.sin_addr.s_addr = htonl(event->cm_info.rem_addr);
|
|
|
|
cm_event.private_data = cm_node->mpa_frame_buf;
|
|
cm_event.private_data_len = (u8) cm_node->mpa_frame_size;
|
|
|
|
ret = cm_id->event_handler(cm_id, &cm_event);
|
|
if (ret)
|
|
printk("%s[%u] OFA CM event_handler returned, ret=%d\n",
|
|
__func__, __LINE__, ret);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
static void nes_cm_event_handler(struct work_struct *);
|
|
|
|
/**
|
|
* nes_cm_post_event
|
|
* post an event to the cm event handler
|
|
*/
|
|
static int nes_cm_post_event(struct nes_cm_event *event)
|
|
{
|
|
atomic_inc(&event->cm_node->cm_core->events_posted);
|
|
add_ref_cm_node(event->cm_node);
|
|
event->cm_info.cm_id->add_ref(event->cm_info.cm_id);
|
|
INIT_WORK(&event->event_work, nes_cm_event_handler);
|
|
nes_debug(NES_DBG_CM, "cm_node=%p queue_work, event=%p\n",
|
|
event->cm_node, event);
|
|
|
|
queue_work(event->cm_node->cm_core->event_wq, &event->event_work);
|
|
|
|
nes_debug(NES_DBG_CM, "Exit\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* nes_cm_event_handler
|
|
* worker function to handle cm events
|
|
* will free instance of nes_cm_event
|
|
*/
|
|
static void nes_cm_event_handler(struct work_struct *work)
|
|
{
|
|
struct nes_cm_event *event = container_of(work, struct nes_cm_event,
|
|
event_work);
|
|
struct nes_cm_core *cm_core;
|
|
|
|
if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core))
|
|
return;
|
|
|
|
cm_core = event->cm_node->cm_core;
|
|
nes_debug(NES_DBG_CM, "event=%p, event->type=%u, events posted=%u\n",
|
|
event, event->type, atomic_read(&cm_core->events_posted));
|
|
|
|
switch (event->type) {
|
|
case NES_CM_EVENT_MPA_REQ:
|
|
cm_event_mpa_req(event);
|
|
nes_debug(NES_DBG_CM, "cm_node=%p CM Event: MPA REQUEST\n",
|
|
event->cm_node);
|
|
break;
|
|
case NES_CM_EVENT_RESET:
|
|
nes_debug(NES_DBG_CM, "cm_node = %p CM Event: RESET\n",
|
|
event->cm_node);
|
|
cm_event_reset(event);
|
|
break;
|
|
case NES_CM_EVENT_CONNECTED:
|
|
if ((!event->cm_node->cm_id) ||
|
|
(event->cm_node->state != NES_CM_STATE_TSA))
|
|
break;
|
|
cm_event_connected(event);
|
|
nes_debug(NES_DBG_CM, "CM Event: CONNECTED\n");
|
|
break;
|
|
case NES_CM_EVENT_ABORTED:
|
|
if ((!event->cm_node->cm_id) ||
|
|
(event->cm_node->state == NES_CM_STATE_TSA))
|
|
break;
|
|
cm_event_connect_error(event);
|
|
nes_debug(NES_DBG_CM, "CM Event: ABORTED\n");
|
|
break;
|
|
case NES_CM_EVENT_DROPPED_PKT:
|
|
nes_debug(NES_DBG_CM, "CM Event: DROPPED PKT\n");
|
|
break;
|
|
default:
|
|
nes_debug(NES_DBG_CM, "CM Event: UNKNOWN EVENT TYPE\n");
|
|
break;
|
|
}
|
|
|
|
atomic_dec(&cm_core->events_posted);
|
|
event->cm_info.cm_id->rem_ref(event->cm_info.cm_id);
|
|
rem_ref_cm_node(cm_core, event->cm_node);
|
|
kfree(event);
|
|
|
|
return;
|
|
}
|