| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Glenn Streiff | 9952 | 52.01% | 2 | 2.15% |
| Faisal Latif | 5780 | 30.21% | 35 | 37.63% |
| Tatyana Nikolova | 2210 | 11.55% | 13 | 13.98% |
| Don Wood | 325 | 1.70% | 4 | 4.30% |
| Steve Wise | 302 | 1.58% | 1 | 1.08% |
| Roland Dreier | 200 | 1.05% | 4 | 4.30% |
| Bob Sharp | 115 | 0.60% | 1 | 1.08% |
| Kees Cook | 42 | 0.22% | 2 | 2.15% |
| Insu Yun | 39 | 0.20% | 1 | 1.08% |
| Harvey Harrison | 39 | 0.20% | 3 | 3.23% |
| David S. Miller | 37 | 0.19% | 4 | 4.30% |
| Arnd Bergmann | 30 | 0.16% | 1 | 1.08% |
| Christoph Hellwig | 10 | 0.05% | 2 | 2.15% |
| Robert P. J. Day | 8 | 0.04% | 1 | 1.08% |
| Dan Carpenter | 8 | 0.04% | 2 | 2.15% |
| Chien Tin Tung | 7 | 0.04% | 2 | 2.15% |
| Eric Dumazet | 6 | 0.03% | 2 | 2.15% |
| Bhaktipriya Shridhar | 6 | 0.03% | 1 | 1.08% |
| Julia Lawall | 4 | 0.02% | 2 | 2.15% |
| Tejun Heo | 3 | 0.02% | 1 | 1.08% |
| Kamal Heib | 2 | 0.01% | 1 | 1.08% |
| Johannes Berg | 2 | 0.01% | 1 | 1.08% |
| Elena Reshetova | 2 | 0.01% | 1 | 1.08% |
| Coly Li | 1 | 0.01% | 1 | 1.08% |
| Bart Van Assche | 1 | 0.01% | 1 | 1.08% |
| Lucas De Marchi | 1 | 0.01% | 1 | 1.08% |
| Ding Tianhong | 1 | 0.01% | 1 | 1.08% |
| Shiraz Saleem | 1 | 0.01% | 1 | 1.08% |
| Arun Sharma | 1 | 0.01% | 1 | 1.08% |
| Total | 19135 | 93 |
/* * Copyright (c) 2006 - 2014 Intel Corporation. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * */ #define TCPOPT_TIMESTAMP 8 #include <linux/atomic.h> #include <linux/skbuff.h> #include <linux/ip.h> #include <linux/tcp.h> #include <linux/init.h> #include <linux/if_arp.h> #include <linux/if_vlan.h> #include <linux/notifier.h> #include <linux/net.h> #include <linux/types.h> #include <linux/timer.h> #include <linux/time.h> #include <linux/delay.h> #include <linux/etherdevice.h> #include <linux/netdevice.h> #include <linux/random.h> #include <linux/list.h> #include <linux/threads.h> #include <linux/highmem.h> #include <linux/slab.h> #include <net/arp.h> #include <net/neighbour.h> #include <net/route.h> #include <net/ip_fib.h> #include <net/secure_seq.h> #include <net/tcp.h> #include <linux/fcntl.h> #include "nes.h" u32 cm_packets_sent; u32 cm_packets_bounced; u32 cm_packets_dropped; u32 cm_packets_retrans; u32 cm_packets_created; u32 cm_packets_received; atomic_t cm_listens_created; atomic_t cm_listens_destroyed; u32 cm_backlog_drops; atomic_t cm_loopbacks; atomic_t cm_nodes_created; atomic_t cm_nodes_destroyed; atomic_t cm_accel_dropped_pkts; atomic_t cm_resets_recvd; static inline int mini_cm_accelerated(struct nes_cm_core *, struct nes_cm_node *); static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *, struct nes_vnic *, struct nes_cm_info *); static int mini_cm_del_listen(struct nes_cm_core *, struct nes_cm_listener *); static struct nes_cm_node *mini_cm_connect(struct nes_cm_core *, struct nes_vnic *, u16, void *, struct nes_cm_info *); static int mini_cm_close(struct nes_cm_core *, struct nes_cm_node *); static int mini_cm_accept(struct nes_cm_core *, struct nes_cm_node *); static int mini_cm_reject(struct nes_cm_core *, struct nes_cm_node *); static int mini_cm_recv_pkt(struct nes_cm_core *, struct nes_vnic *, struct sk_buff *); static int mini_cm_dealloc_core(struct nes_cm_core *); static int mini_cm_get(struct nes_cm_core *); static int mini_cm_set(struct nes_cm_core *, u32, u32); static void form_cm_frame(struct sk_buff *, struct nes_cm_node *, void *, u32, void *, u32, u8); static int add_ref_cm_node(struct nes_cm_node *); static int rem_ref_cm_node(struct nes_cm_core *, struct nes_cm_node *); static int nes_cm_disconn_true(struct nes_qp *); static int nes_cm_post_event(struct nes_cm_event *event); static int nes_disconnect(struct nes_qp *nesqp, int abrupt); static void nes_disconnect_worker(struct work_struct *work); static int send_mpa_request(struct nes_cm_node *, struct sk_buff *); static int send_mpa_reject(struct nes_cm_node *); static int send_syn(struct nes_cm_node *, u32, struct sk_buff *); static int send_reset(struct nes_cm_node *, struct sk_buff *); static int send_ack(struct nes_cm_node *cm_node, struct sk_buff *skb); static int send_fin(struct nes_cm_node *cm_node, struct sk_buff *skb); static void process_packet(struct nes_cm_node *, struct sk_buff *, struct nes_cm_core *); static void active_open_err(struct nes_cm_node *, struct sk_buff *, int); static void passive_open_err(struct nes_cm_node *, struct sk_buff *, int); static void cleanup_retrans_entry(struct nes_cm_node *); static void handle_rcv_mpa(struct nes_cm_node *, struct sk_buff *); static void free_retrans_entry(struct nes_cm_node *cm_node); static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb, int optionsize, int passive); /* CM event handler functions */ static void cm_event_connected(struct nes_cm_event *); static void cm_event_connect_error(struct nes_cm_event *); static void cm_event_reset(struct nes_cm_event *); static void cm_event_mpa_req(struct nes_cm_event *); static void cm_event_mpa_reject(struct nes_cm_event *); static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node); /* MPA build functions */ static int cm_build_mpa_frame(struct nes_cm_node *, u8 **, u16 *, u8 *, u8); static void build_mpa_v2(struct nes_cm_node *, void *, u8); static void build_mpa_v1(struct nes_cm_node *, void *, u8); static void build_rdma0_msg(struct nes_cm_node *, struct nes_qp **); static void print_core(struct nes_cm_core *core); static void record_ird_ord(struct nes_cm_node *, u16, u16); /* External CM API Interface */ /* instance of function pointers for client API */ /* set address of this instance to cm_core->cm_ops at cm_core alloc */ static const struct nes_cm_ops nes_cm_api = { .accelerated = mini_cm_accelerated, .listen = mini_cm_listen, .stop_listener = mini_cm_del_listen, .connect = mini_cm_connect, .close = mini_cm_close, .accept = mini_cm_accept, .reject = mini_cm_reject, .recv_pkt = mini_cm_recv_pkt, .destroy_cm_core = mini_cm_dealloc_core, .get = mini_cm_get, .set = mini_cm_set }; static struct nes_cm_core *g_cm_core; atomic_t cm_connects; atomic_t cm_accepts; atomic_t cm_disconnects; atomic_t cm_closes; atomic_t cm_connecteds; atomic_t cm_connect_reqs; atomic_t cm_rejects; int nes_add_ref_cm_node(struct nes_cm_node *cm_node) { return add_ref_cm_node(cm_node); } int nes_rem_ref_cm_node(struct nes_cm_node *cm_node) { return rem_ref_cm_node(cm_node->cm_core, cm_node); } /** * create_event */ static struct nes_cm_event *create_event(struct nes_cm_node * cm_node, enum nes_cm_event_type type) { struct nes_cm_event *event; if (!cm_node->cm_id) return NULL; /* allocate an empty event */ event = kzalloc(sizeof(*event), GFP_ATOMIC); if (!event) return NULL; event->type = type; event->cm_node = cm_node; event->cm_info.rem_addr = cm_node->rem_addr; event->cm_info.loc_addr = cm_node->loc_addr; event->cm_info.rem_port = cm_node->rem_port; event->cm_info.loc_port = cm_node->loc_port; event->cm_info.cm_id = cm_node->cm_id; nes_debug(NES_DBG_CM, "cm_node=%p Created event=%p, type=%u, " "dst_addr=%08x[%x], src_addr=%08x[%x]\n", cm_node, event, type, event->cm_info.loc_addr, event->cm_info.loc_port, event->cm_info.rem_addr, event->cm_info.rem_port); nes_cm_post_event(event); return event; } /** * send_mpa_request */ static int send_mpa_request(struct nes_cm_node *cm_node, struct sk_buff *skb) { u8 start_addr = 0; u8 *start_ptr = &start_addr; u8 **start_buff = &start_ptr; u16 buff_len = 0; if (!skb) { nes_debug(NES_DBG_CM, "skb set to NULL\n"); return -1; } /* send an MPA Request frame */ cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REQUEST); form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK); return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); } static int send_mpa_reject(struct nes_cm_node *cm_node) { struct sk_buff *skb = NULL; u8 start_addr = 0; u8 *start_ptr = &start_addr; u8 **start_buff = &start_ptr; u16 buff_len = 0; struct ietf_mpa_v1 *mpa_frame; skb = dev_alloc_skb(MAX_CM_BUFFER); if (!skb) { nes_debug(NES_DBG_CM, "Failed to get a Free pkt\n"); return -ENOMEM; } /* send an MPA reject frame */ cm_build_mpa_frame(cm_node, start_buff, &buff_len, NULL, MPA_KEY_REPLY); mpa_frame = (struct ietf_mpa_v1 *)*start_buff; mpa_frame->flags |= IETF_MPA_FLAGS_REJECT; form_cm_frame(skb, cm_node, NULL, 0, *start_buff, buff_len, SET_ACK | SET_FIN); cm_node->state = NES_CM_STATE_FIN_WAIT1; return schedule_nes_timer(cm_node, skb, NES_TIMER_TYPE_SEND, 1, 0); } /** * recv_mpa - process a received TCP pkt, we are expecting an * IETF MPA frame */ static int parse_mpa(struct nes_cm_node *cm_node, u8 *buffer, u32 *type, u32 len) { struct ietf_mpa_v1 *mpa_frame; struct ietf_mpa_v2 *mpa_v2_frame; struct ietf_rtr_msg *rtr_msg; int mpa_hdr_len; int priv_data_len; *type = NES_MPA_REQUEST_ACCEPT; /* assume req frame is in tcp data payload */ if (len < sizeof(struct ietf_mpa_v1)) { nes_debug(NES_DBG_CM, "The received ietf buffer was too small (%x)\n", len); return -EINVAL; } /* points to the beginning of the frame, which could be MPA V1 or V2 */ mpa_frame = (struct ietf_mpa_v1 *)buffer; mpa_hdr_len = sizeof(struct ietf_mpa_v1); priv_data_len = ntohs(mpa_frame->priv_data_len); /* make sure mpa private data len is less than 512 bytes */ if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) { nes_debug(NES_DBG_CM, "The received Length of Private" " Data field exceeds 512 octets\n"); return -EINVAL; } /* * make sure MPA receiver interoperate with the * received MPA version and MPA key information * */ if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { nes_debug(NES_DBG_CM, "The received mpa version" " is not supported\n"); return -EINVAL; } /* * backwards compatibility only */ if (mpa_frame->rev > cm_node->mpa_frame_rev) { nes_debug(NES_DBG_CM, "The received mpa version" " can not be interoperated\n"); return -EINVAL; } else { cm_node->mpa_frame_rev = mpa_frame->rev; } if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) { if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) { nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n"); return -EINVAL; } } else { if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) { nes_debug(NES_DBG_CM, "Unexpected MPA Key received \n"); return -EINVAL; } } if (priv_data_len + mpa_hdr_len != len) { nes_debug(NES_DBG_CM, "The received ietf buffer was not right" " complete (%x + %x != %x)\n", priv_data_len, mpa_hdr_len, len); return -EINVAL; } /* make sure it does not exceed the max size */ if (len > MAX_CM_BUFFER) { nes_debug(NES_DBG_CM, "The received ietf buffer was too large" " (%x + %x != %x)\n", priv_data_len, mpa_hdr_len, len); return -EINVAL; } cm_node->mpa_frame_size = priv_data_len; switch (mpa_frame->rev) { case IETF_MPA_V2: { u16 ird_size; u16 ord_size; u16 rtr_ctrl_ird; u16 rtr_ctrl_ord; mpa_v2_frame = (struct ietf_mpa_v2 *)buffer; mpa_hdr_len += IETF_RTR_MSG_SIZE; cm_node->mpa_frame_size -= IETF_RTR_MSG_SIZE; rtr_msg = &mpa_v2_frame->rtr_msg; /* parse rtr message */ rtr_ctrl_ird = ntohs(rtr_msg->ctrl_ird); rtr_ctrl_ord = ntohs(rtr_msg->ctrl_ord); ird_size = rtr_ctrl_ird & IETF_NO_IRD_ORD; ord_size = rtr_ctrl_ord & IETF_NO_IRD_ORD; if (!(rtr_ctrl_ird & IETF_PEER_TO_PEER)) { /* send reset */ return -EINVAL; } if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD; if (cm_node->mpav2_ird_ord != IETF_NO_IRD_ORD) { /* responder */ if (cm_node->state != NES_CM_STATE_MPAREQ_SENT) { /* we are still negotiating */ if (ord_size > NES_MAX_IRD) { cm_node->ird_size = NES_MAX_IRD; } else { cm_node->ird_size = ord_size; if (ord_size == 0 && (rtr_ctrl_ord & IETF_RDMA0_READ)) { cm_node->ird_size = 1; nes_debug(NES_DBG_CM, "%s: Remote peer doesn't support RDMA0_READ (ord=%u)\n", __func__, ord_size); } } if (ird_size > NES_MAX_ORD) cm_node->ord_size = NES_MAX_ORD; else cm_node->ord_size = ird_size; } else { /* initiator */ if (ord_size > NES_MAX_IRD) { nes_debug(NES_DBG_CM, "%s: Unable to support the requested (ord =%u)\n", __func__, ord_size); return -EINVAL; } cm_node->ird_size = ord_size; if (ird_size > NES_MAX_ORD) { cm_node->ord_size = NES_MAX_ORD; } else { if (ird_size == 0 && (rtr_ctrl_ord & IETF_RDMA0_READ)) { nes_debug(NES_DBG_CM, "%s: Remote peer doesn't support RDMA0_READ (ird=%u)\n", __func__, ird_size); return -EINVAL; } else { cm_node->ord_size = ird_size; } } } } if (rtr_ctrl_ord & IETF_RDMA0_READ) { cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; } else if (rtr_ctrl_ord & IETF_RDMA0_WRITE) { cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO; } else { /* Not supported RDMA0 operation */ return -EINVAL; } break; } case IETF_MPA_V1: default: break; } /* copy entire MPA frame to our cm_node's frame */ memcpy(cm_node->mpa_frame_buf, buffer + mpa_hdr_len, cm_node->mpa_frame_size); if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) *type = NES_MPA_REQUEST_REJECT; return 0; } /** * form_cm_frame - get a free packet and build empty frame Use * node info to build. */ static void form_cm_frame(struct sk_buff *skb, struct nes_cm_node *cm_node, void *options, u32 optionsize, void *data, u32 datasize, u8 flags) { struct tcphdr *tcph; struct iphdr *iph; struct ethhdr *ethh; u8 *buf; u16 packetsize = sizeof(*iph); packetsize += sizeof(*tcph); packetsize += optionsize + datasize; skb_trim(skb, 0); memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph)); buf = skb_put(skb, packetsize + ETH_HLEN); ethh = (struct ethhdr *)buf; buf += ETH_HLEN; iph = (struct iphdr *)buf; buf += sizeof(*iph); tcph = (struct tcphdr *)buf; skb_reset_mac_header(skb); skb_set_network_header(skb, ETH_HLEN); skb_set_transport_header(skb, ETH_HLEN + sizeof(*iph)); buf += sizeof(*tcph); skb->ip_summed = CHECKSUM_PARTIAL; if (!(cm_node->netdev->features & NETIF_F_IP_CSUM)) skb->ip_summed = CHECKSUM_NONE; skb->protocol = htons(0x800); skb->data_len = 0; skb->mac_len = ETH_HLEN; memcpy(ethh->h_dest, cm_node->rem_mac, ETH_ALEN); memcpy(ethh->h_source, cm_node->loc_mac, ETH_ALEN); ethh->h_proto = htons(0x0800); iph->version = IPVERSION; iph->ihl = 5; /* 5 * 4Byte words, IP headr len */ iph->tos = 0; iph->tot_len = htons(packetsize); iph->id = htons(++cm_node->tcp_cntxt.loc_id); iph->frag_off = htons(0x4000); iph->ttl = 0x40; iph->protocol = 0x06; /* IPPROTO_TCP */ iph->saddr = htonl(cm_node->loc_addr); iph->daddr = htonl(cm_node->rem_addr); tcph->source = htons(cm_node->loc_port); tcph->dest = htons(cm_node->rem_port); tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num); if (flags & SET_ACK) { cm_node->tcp_cntxt.loc_ack_num = cm_node->tcp_cntxt.rcv_nxt; tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num); tcph->ack = 1; } else { tcph->ack_seq = 0; } if (flags & SET_SYN) { cm_node->tcp_cntxt.loc_seq_num++; tcph->syn = 1; } else { cm_node->tcp_cntxt.loc_seq_num += datasize; } if (flags & SET_FIN) { cm_node->tcp_cntxt.loc_seq_num++; tcph->fin = 1; } if (flags & SET_RST) tcph->rst = 1; tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2); tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); tcph->urg_ptr = 0; if (optionsize) memcpy(buf, options, optionsize); buf += optionsize; if (datasize) memcpy(buf, data, datasize); skb_shinfo(skb)->nr_frags = 0; cm_packets_created++; } /** * print_core - dump a cm core */ static void print_core(struct nes_cm_core *core) { nes_debug(NES_DBG_CM, "---------------------------------------------\n"); nes_debug(NES_DBG_CM, "CM Core -- (core = %p )\n", core); if (!core) return; nes_debug(NES_DBG_CM, "---------------------------------------------\n"); nes_debug(NES_DBG_CM, "State : %u \n", core->state); nes_debug(NES_DBG_CM, "Listen Nodes : %u \n", atomic_read(&core->listen_node_cnt)); nes_debug(NES_DBG_CM, "Active Nodes : %u \n", atomic_read(&core->node_cnt)); nes_debug(NES_DBG_CM, "core : %p \n", core); nes_debug(NES_DBG_CM, "-------------- end core ---------------\n"); } static void record_ird_ord(struct nes_cm_node *cm_node, u16 conn_ird, u16 conn_ord) { if (conn_ird > NES_MAX_IRD) conn_ird = NES_MAX_IRD; if (conn_ord > NES_MAX_ORD) conn_ord = NES_MAX_ORD; cm_node->ird_size = conn_ird; cm_node->ord_size = conn_ord; } /** * cm_build_mpa_frame - build a MPA V1 frame or MPA V2 frame */ static int cm_build_mpa_frame(struct nes_cm_node *cm_node, u8 **start_buff, u16 *buff_len, u8 *pci_mem, u8 mpa_key) { int ret = 0; *start_buff = (pci_mem) ? pci_mem : &cm_node->mpa_frame_buf[0]; switch (cm_node->mpa_frame_rev) { case IETF_MPA_V1: *start_buff = (u8 *)*start_buff + sizeof(struct ietf_rtr_msg); *buff_len = sizeof(struct ietf_mpa_v1) + cm_node->mpa_frame_size; build_mpa_v1(cm_node, *start_buff, mpa_key); break; case IETF_MPA_V2: *buff_len = sizeof(struct ietf_mpa_v2) + cm_node->mpa_frame_size; build_mpa_v2(cm_node, *start_buff, mpa_key); break; default: ret = -EINVAL; } return ret; } /** * build_mpa_v2 - build a MPA V2 frame */ static void build_mpa_v2(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key) { struct ietf_mpa_v2 *mpa_frame = (struct ietf_mpa_v2 *)start_addr; struct ietf_rtr_msg *rtr_msg = &mpa_frame->rtr_msg; u16 ctrl_ird; u16 ctrl_ord; /* initialize the upper 5 bytes of the frame */ build_mpa_v1(cm_node, start_addr, mpa_key); mpa_frame->flags |= IETF_MPA_V2_FLAG; /* set a bit to indicate MPA V2 */ mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE); /* initialize RTR msg */ if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { ctrl_ird = IETF_NO_IRD_ORD; ctrl_ord = IETF_NO_IRD_ORD; } else { ctrl_ird = cm_node->ird_size & IETF_NO_IRD_ORD; ctrl_ord = cm_node->ord_size & IETF_NO_IRD_ORD; } ctrl_ird |= IETF_PEER_TO_PEER; switch (mpa_key) { case MPA_KEY_REQUEST: ctrl_ord |= IETF_RDMA0_WRITE; ctrl_ord |= IETF_RDMA0_READ; break; case MPA_KEY_REPLY: switch (cm_node->send_rdma0_op) { case SEND_RDMA_WRITE_ZERO: ctrl_ord |= IETF_RDMA0_WRITE; break; case SEND_RDMA_READ_ZERO: ctrl_ord |= IETF_RDMA0_READ; break; } } rtr_msg->ctrl_ird = htons(ctrl_ird); rtr_msg->ctrl_ord = htons(ctrl_ord); } /** * build_mpa_v1 - build a MPA V1 frame */ static void build_mpa_v1(struct nes_cm_node *cm_node, void *start_addr, u8 mpa_key) { struct ietf_mpa_v1 *mpa_frame = (struct ietf_mpa_v1 *)start_addr; switch (mpa_key) { case MPA_KEY_REQUEST: memcpy(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE); break; case MPA_KEY_REPLY: memcpy(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE); break; } mpa_frame->flags = IETF_MPA_FLAGS_CRC; mpa_frame->rev = cm_node->mpa_frame_rev; mpa_frame->priv_data_len = htons(cm_node->mpa_frame_size); } static void build_rdma0_msg(struct nes_cm_node *cm_node, struct nes_qp **nesqp_addr) { u64 u64temp; struct nes_qp *nesqp = *nesqp_addr; struct nes_hw_qp_wqe *wqe = &nesqp->hwqp.sq_vbase[0]; u64temp = (unsigned long)nesqp->nesuqp_addr; 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_FRAG0_LOW_IDX] = 0; wqe->wqe_words[NES_IWARP_SQ_WQE_FRAG0_HIGH_IDX] = 0; switch (cm_node->send_rdma0_op) { case SEND_RDMA_WRITE_ZERO: nes_debug(NES_DBG_CM, "Sending first write.\n"); 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_LENGTH0_IDX] = 0; wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0; break; case SEND_RDMA_READ_ZERO: default: if (cm_node->send_rdma0_op != SEND_RDMA_READ_ZERO) WARN(1, "Unsupported RDMA0 len operation=%u\n", cm_node->send_rdma0_op); nes_debug(NES_DBG_CM, "Sending first rdma operation.\n"); wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(NES_IWARP_SQ_OP_RDMAR); wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX] = 1; wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_TO_HIGH_IDX] = 0; wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] = 0; wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_STAG_IDX] = 1; wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 1; break; } if (nesqp->sq_kmapped) { nesqp->sq_kmapped = 0; kunmap(nesqp->page); } /*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; } /** * schedule_nes_timer * note - cm_node needs to be protected before calling this. Encase in: * rem_ref_cm_node(cm_core, cm_node);add_ref_cm_node(cm_node); */ int schedule_nes_timer(struct nes_cm_node *cm_node, struct sk_buff *skb, enum nes_timer_type type, int send_retrans, int close_when_complete) { unsigned long flags; struct nes_cm_core *cm_core = cm_node->cm_core; struct nes_timer_entry *new_send; int ret = 0; new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); if (!new_send) return -ENOMEM; /* new_send->timetosend = currenttime */ new_send->retrycount = NES_DEFAULT_RETRYS; new_send->retranscount = NES_DEFAULT_RETRANS; new_send->skb = skb; new_send->timetosend = jiffies; new_send->type = type; new_send->netdev = cm_node->netdev; new_send->send_retrans = send_retrans; new_send->close_when_complete = close_when_complete; if (type == NES_TIMER_TYPE_CLOSE) { new_send->timetosend += (HZ / 10); if (cm_node->recv_entry) { kfree(new_send); WARN_ON(1); return -EINVAL; } cm_node->recv_entry = new_send; } if (type == NES_TIMER_TYPE_SEND) { new_send->seq_num = ntohl(tcp_hdr(skb)->seq); refcount_inc(&new_send->skb->users); spin_lock_irqsave(&cm_node->retrans_list_lock, flags); cm_node->send_entry = new_send; add_ref_cm_node(cm_node); spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); new_send->timetosend = jiffies + NES_RETRY_TIMEOUT; ret = nes_nic_cm_xmit(new_send->skb, cm_node->netdev); if (ret != NETDEV_TX_OK) { nes_debug(NES_DBG_CM, "Error sending packet %p " "(jiffies = %lu)\n", new_send, jiffies); new_send->timetosend = jiffies; ret = NETDEV_TX_OK; } else { cm_packets_sent++; if (!send_retrans) { cleanup_retrans_entry(cm_node); if (close_when_complete) rem_ref_cm_node(cm_core, cm_node); return ret; } } } if (!timer_pending(&cm_core->tcp_timer)) mod_timer(&cm_core->tcp_timer, new_send->timetosend); return ret; } static void nes_retrans_expired(struct nes_cm_node *cm_node) { struct iw_cm_id *cm_id = cm_node->cm_id; enum nes_cm_node_state state = cm_node->state; cm_node->state = NES_CM_STATE_CLOSED; switch (state) { case NES_CM_STATE_SYN_RCVD: case NES_CM_STATE_CLOSING: rem_ref_cm_node(cm_node->cm_core, cm_node); break; case NES_CM_STATE_LAST_ACK: case NES_CM_STATE_FIN_WAIT1: if (cm_node->cm_id) cm_id->rem_ref(cm_id); send_reset(cm_node, NULL); break; default: add_ref_cm_node(cm_node); send_reset(cm_node, NULL); create_event(cm_node, NES_CM_EVENT_ABORTED); } } static void handle_recv_entry(struct nes_cm_node *cm_node, u32 rem_node) { struct nes_timer_entry *recv_entry = cm_node->recv_entry; struct iw_cm_id *cm_id = cm_node->cm_id; struct nes_qp *nesqp; unsigned long qplockflags; if (!recv_entry) return; nesqp = (struct nes_qp *)recv_entry->skb; if (nesqp) { 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)); } } else if (rem_node) { /* TIME_WAIT state */ rem_ref_cm_node(cm_node->cm_core, cm_node); } if (cm_node->cm_id) cm_id->rem_ref(cm_id); kfree(recv_entry); cm_node->recv_entry = NULL; } /** * nes_cm_timer_tick */ static void nes_cm_timer_tick(struct timer_list *unused) { unsigned long flags; unsigned long nexttimeout = jiffies + NES_LONG_TIME; struct nes_cm_node *cm_node; struct nes_timer_entry *send_entry, *recv_entry; struct list_head *list_core_temp; struct list_head *list_node; struct nes_cm_core *cm_core = g_cm_core; u32 settimer = 0; unsigned long timetosend; int ret = NETDEV_TX_OK; struct list_head timer_list; INIT_LIST_HEAD(&timer_list); spin_lock_irqsave(&cm_core->ht_lock, flags); list_for_each_safe(list_node, list_core_temp, &cm_core->connected_nodes) { cm_node = container_of(list_node, struct nes_cm_node, list); if ((cm_node->recv_entry) || (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); recv_entry = cm_node->recv_entry; if (recv_entry) { if (time_after(recv_entry->timetosend, jiffies)) { if (nexttimeout > recv_entry->timetosend || !settimer) { nexttimeout = recv_entry->timetosend; settimer = 1; } } else { handle_recv_entry(cm_node, 1); } } 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; } } 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++; free_retrans_entry(cm_node); spin_unlock_irqrestore( &cm_node->retrans_list_lock, flags); nes_retrans_expired(cm_node); cm_node->state = NES_CM_STATE_CLOSED; spin_lock_irqsave(&cm_node->retrans_list_lock, flags); break; } refcount_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++; 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--; timetosend = (NES_RETRY_TIMEOUT << (NES_DEFAULT_RETRANS - send_entry->retranscount)); send_entry->timetosend = jiffies + min(timetosend, NES_MAX_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 (settimer) { if (!timer_pending(&cm_core->tcp_timer)) mod_timer(&cm_core->tcp_timer, nexttimeout); } } /** * 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 -ENOMEM; } 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; /* get a handle on the hte */ hte = &cm_core->connected_nodes; /* 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; nes_addr_t listen_addr; u16 listen_port; /* 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) { listen_addr = listen_node->loc_addr; listen_port = listen_node->loc_port; /* compare node pair, return node handle if a match */ if (((listen_addr == dst_addr) || listen_addr == 0x00000000) && (listen_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); /* 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 = -EINVAL; int err = 0; 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); { struct nes_cm_node *loopback = cm_node->loopbackpartner; enum nes_cm_node_state old_state; if (NES_CM_STATE_FIN_WAIT1 <= cm_node->state) { rem_ref_cm_node(cm_node->cm_core, cm_node); } else { if (!loopback) { cleanup_retrans_entry(cm_node); err = send_reset(cm_node, NULL); if (err) { cm_node->state = NES_CM_STATE_CLOSED; WARN_ON(1); } else { old_state = cm_node->state; cm_node->state = NES_CM_STATE_LISTENER_DESTROYED; if (old_state != NES_CM_STATE_MPAREQ_RCVD) rem_ref_cm_node( cm_node->cm_core, cm_node); } } else { struct nes_cm_event event; event.cm_node = loopback; event.cm_info.rem_addr = loopback->rem_addr; event.cm_info.loc_addr = loopback->loc_addr; event.cm_info.rem_port = loopback->rem_port; event.cm_info.loc_port = loopback->loc_port; event.cm_info.cm_id = loopback->cm_id; add_ref_cm_node(loopback); loopback->state = NES_CM_STATE_CLOSED; cm_event_connect_error(&event); cm_node->state = NES_CM_STATE_LISTENER_DESTROYED; 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_NLMSG, "Delete APBVT loc_port = %04X\n", listener->loc_port); } nes_debug(NES_DBG_CM, "destroying listener (%p)\n", listener); kfree(listener); listener = NULL; ret = 0; atomic_inc(&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) { cm_node->accelerated = true; if (cm_node->accept_pend) { BUG_ON(!cm_node->listener); atomic_dec(&cm_node->listener->pend_accepts_cnt); cm_node->accept_pend = 0; BUG_ON(atomic_read(&cm_node->listener->pend_accepts_cnt) < 0); } if (!timer_pending(&cm_core->tcp_timer)) mod_timer(&cm_core->tcp_timer, (jiffies + NES_SHORT_TIME)); return 0; } /** * nes_addr_resolve_neigh */ static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpindex) { struct rtable *rt; struct neighbour *neigh; int rc = arpindex; struct nes_adapter *nesadapter = nesvnic->nesdev->nesadapter; __be32 dst_ipaddr = htonl(dst_ip); rt = ip_route_output(&init_net, dst_ipaddr, nesvnic->local_ipaddr, 0, 0); if (IS_ERR(rt)) { printk(KERN_ERR "%s: ip_route_output_key failed for 0x%08X\n", __func__, dst_ip); return rc; } neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); rcu_read_lock(); 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)); if (arpindex >= 0) { if (ether_addr_equal(nesadapter->arp_table[arpindex].mac_addr, neigh->ha)) { /* Mac address same as in nes_arp_table */ goto out; } nes_manage_arp_cache(nesvnic->netdev, nesadapter->arp_table[arpindex].mac_addr, dst_ip, NES_ARP_DELETE); } 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); } else { neigh_event_send(neigh, NULL); } } out: rcu_read_unlock(); if (neigh) neigh_release(neigh); 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; int oldarpindex = 0; 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 */ if (listener) { cm_node->loc_addr = listener->loc_addr; cm_node->loc_port = listener->loc_port; } else { cm_node->loc_addr = cm_info->loc_addr; cm_node->loc_port = cm_info->loc_port; } cm_node->rem_addr = cm_info->rem_addr; cm_node->rem_port = cm_info->rem_port; cm_node->mpa_frame_rev = mpa_version; cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; cm_node->mpav2_ird_ord = 0; cm_node->ird_size = 0; cm_node->ord_size = 0; 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; if (listener) cm_node->tos = listener->tos; 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); 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; cm_node->tcp_cntxt.loc_seq_num = secure_tcp_seq(htonl(cm_node->loc_addr), htonl(cm_node->rem_addr), htons(cm_node->loc_port), htons(cm_node->rem_port)); 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 */ oldarpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE); arpindex = nes_addr_resolve_neigh(nesvnic, cm_node->rem_addr, oldarpindex); 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; 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); } WARN_ON(cm_node->send_entry); if (cm_node->recv_entry) handle_recv_entry(cm_node, 0); 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); } nes_debug(NES_DBG_NLMSG, "Delete APBVT loc_port = %04X\n", cm_node->loc_port); } 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; } 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; 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) { 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)); 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_MPAREJ_RCVD: cm_node->tcp_cntxt.rcv_nxt++; cleanup_retrans_entry(cm_node); cm_node->state = NES_CM_STATE_LAST_ACK; send_fin(cm_node, NULL); break; case NES_CM_STATE_MPAREQ_SENT: create_event(cm_node, NES_CM_EVENT_ABORTED); cm_node->tcp_cntxt.rcv_nxt++; cleanup_retrans_entry(cm_node); cm_node->state = NES_CM_STATE_CLOSED; add_ref_cm_node(cm_node); send_reset(cm_node, NULL); break; case NES_CM_STATE_FIN_WAIT1: cm_node->tcp_cntxt.rcv_nxt++; cleanup_retrans_entry(cm_node); cm_node->state = NES_CM_STATE_CLOSING; send_ack(cm_node, NULL); /* Wait for ACK as this is simultaneous close.. * After we receive ACK, do not send anything.. * Just rm the node.. Done.. */ break; case NES_CM_STATE_FIN_WAIT2: cm_node->tcp_cntxt.rcv_nxt++; cleanup_retrans_entry(cm_node); cm_node->state = NES_CM_STATE_TIME_WAIT; send_ack(cm_node, NULL); schedule_nes_timer(cm_node, NULL, NES_TIMER_TYPE_CLOSE, 1, 0); break; case NES_CM_STATE_TIME_WAIT: cm_node->tcp_cntxt.rcv_nxt++; cleanup_retrans_entry(cm_node); cm_node->state = NES_CM_STATE_CLOSED; rem_ref_cm_node(cm_node->cm_core, cm_node); 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); 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.. */ 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); switch (cm_node->mpa_frame_rev) { case IETF_MPA_V2: cm_node->mpa_frame_rev = IETF_MPA_V1; /* send a syn and goto syn sent state */ cm_node->state = NES_CM_STATE_SYN_SENT; if (send_syn(cm_node, 0, NULL)) { active_open_err(cm_node, skb, reset); } break; case IETF_MPA_V1: default: active_open_err(cm_node, skb, reset); break; } break; case NES_CM_STATE_MPAREQ_RCVD: atomic_inc(&cm_node->passive_state); 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: drop_packet(skb); break; case NES_CM_STATE_FIN_WAIT2: case NES_CM_STATE_FIN_WAIT1: case NES_CM_STATE_LAST_ACK: cm_node->cm_id->rem_ref(cm_node->cm_id); /* fall through */ case NES_CM_STATE_TIME_WAIT: cm_node->state = NES_CM_STATE_CLOSED; rem_ref_cm_node(cm_node->cm_core, 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) { int ret = 0; int datasize = skb->len; u8 *dataloc = skb->data; enum nes_cm_event_type type = NES_CM_EVENT_UNKNOWN; u32 res_type; ret = parse_mpa(cm_node, dataloc, &res_type, datasize); if (ret) { nes_debug(NES_DBG_CM, "didn't like MPA Request\n"); if (cm_node->state == 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); } else { passive_open_err(cm_node, skb, 1); } return; } switch (cm_node->state) { case NES_CM_STATE_ESTABLISHED: if (res_type == NES_MPA_REQUEST_REJECT) /*BIG problem as we are receiving the MPA.. So should * not be REJECT.. This is Passive Open.. We can * only receive it Reject for Active Open...*/ WARN_ON(1); cm_node->state = NES_CM_STATE_MPAREQ_RCVD; type = NES_CM_EVENT_MPA_REQ; atomic_set(&cm_node->passive_state, NES_PASSIVE_STATE_INDICATED); break; case NES_CM_STATE_MPAREQ_SENT: cleanup_retrans_entry(cm_node); if (res_type == NES_MPA_REQUEST_REJECT) { type = NES_CM_EVENT_MPA_REJECT; cm_node->state = NES_CM_STATE_MPAREJ_RCVD; } else { type = NES_CM_EVENT_CONNECTED; cm_node->state = NES_CM_STATE_TSA; } send_ack(cm_node, NULL); break; default: WARN_ON(1); break; } dev_kfree_skb_any(skb); create_event(cm_node, type); } 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 (!between(seq, rcv_nxt, (rcv_nxt + rcv_wnd))) 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 */ 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->accept_pend = 1; atomic_inc(&cm_node->listener->pend_accepts_cnt); 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); add_ref_cm_node(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: cleanup_retrans_entry(cm_node); /* 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: cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); cleanup_retrans_entry(cm_node); cm_node->state = NES_CM_STATE_CLOSED; send_reset(cm_node, skb); break; case NES_CM_STATE_CLOSED: cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); cleanup_retrans_entry(cm_node); add_ref_cm_node(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 int handle_ack_pkt(struct nes_cm_node *cm_node, struct sk_buff *skb, struct tcphdr *tcph) { int datasize = 0; u32 inc_sequence; int ret = 0; int optionsize; optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); if (check_seq(cm_node, tcph, skb)) return -EINVAL; skb_pull(skb, tcph->doff << 2); inc_sequence = ntohl(tcph->seq); datasize = skb->len; switch (cm_node->state) { case NES_CM_STATE_SYN_RCVD: /* Passive OPEN */ cleanup_retrans_entry(cm_node); 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->state = NES_CM_STATE_ESTABLISHED; if (datasize) { cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; handle_rcv_mpa(cm_node, skb); } else { /* rcvd ACK only */ dev_kfree_skb_any(skb); } break; case NES_CM_STATE_ESTABLISHED: /* Passive OPEN */ cleanup_retrans_entry(cm_node); if (datasize) { cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; handle_rcv_mpa(cm_node, skb); } 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); } else { /* Could be just an ack pkt.. */ dev_kfree_skb_any(skb); } break; case NES_CM_STATE_LISTENING: cleanup_retrans_entry(cm_node); cm_node->state = NES_CM_STATE_CLOSED; send_reset(cm_node, skb); break; case NES_CM_STATE_CLOSED: cleanup_retrans_entry(cm_node); add_ref_cm_node(cm_node); send_reset(cm_node, skb); break; case NES_CM_STATE_LAST_ACK: case NES_CM_STATE_CLOSING: cleanup_retrans_entry(cm_node); cm_node->state = NES_CM_STATE_CLOSED; cm_node->cm_id->rem_ref(cm_node->cm_id); rem_ref_cm_node(cm_node->cm_core, cm_node); drop_packet(skb); break; case NES_CM_STATE_FIN_WAIT1: cleanup_retrans_entry(cm_node); drop_packet(skb); cm_node->state = NES_CM_STATE_FIN_WAIT2; break; 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_UNKNOWN: default: cleanup_retrans_entry(cm_node); drop_packet(skb); break; } return ret; } 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); u32 fin_set = 0; int ret = 0; 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->ack) { pkt_type = NES_PKT_TYPE_ACK; } if (tcph->fin) fin_set = 1; 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: ret = handle_ack_pkt(cm_node, skb, tcph); if (fin_set && !ret) handle_fin_pkt(cm_node); break; case NES_PKT_TYPE_RST: handle_rst_pkt(cm_node, skb, tcph); break; default: if ((fin_set) && (!check_seq(cm_node, tcph, skb))) handle_fin_pkt(cm_node); 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, cm_info->loc_addr, 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) return NULL; listener->loc_addr = cm_info->loc_addr; listener->loc_port = 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; u8 *start_buff; /* create a CM connection node */ cm_node = make_cm_node(cm_core, nesvnic, cm_info, NULL); if (!cm_node) return NULL; /* 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, cm_node->loc_addr, cm_node->rem_port, NES_CM_LISTENER_ACTIVE_STATE); if (loopbackremotelistener == NULL) { create_event(cm_node, NES_CM_EVENT_ABORTED); } else { 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.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); if (!loopbackremotenode) { rem_ref_cm_node(cm_node->cm_core, cm_node); return NULL; } atomic_inc(&cm_loopbacks); 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; loopbackremotenode->state = NES_CM_STATE_MPAREQ_RCVD; create_event(loopbackremotenode, NES_CM_EVENT_MPA_REQ); } return cm_node; } start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2); cm_node->mpa_frame_size = private_data_len; memcpy(start_buff, private_data, private_data_len); /* 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 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 nes_cm_node *cm_node) { int ret = 0; int err = 0; int passive_state; struct nes_cm_event event; struct iw_cm_id *cm_id = cm_node->cm_id; struct nes_cm_node *loopback = cm_node->loopbackpartner; 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); if (!loopback) { passive_state = atomic_add_return(1, &cm_node->passive_state); if (passive_state == NES_SEND_RESET_EVENT) { cm_node->state = NES_CM_STATE_CLOSED; rem_ref_cm_node(cm_core, cm_node); } else { if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) { rem_ref_cm_node(cm_core, cm_node); } else { ret = send_mpa_reject(cm_node); if (ret) { cm_node->state = NES_CM_STATE_CLOSED; err = send_reset(cm_node, NULL); if (err) WARN_ON(1); } else { cm_id->add_ref(cm_id); } } } } else { cm_node->cm_id = NULL; if (cm_node->state == NES_CM_STATE_LISTENER_DESTROYED) { rem_ref_cm_node(cm_core, cm_node); rem_ref_cm_node(cm_core, loopback); } else { event.cm_node = loopback; event.cm_info.rem_addr = loopback->rem_addr; event.cm_info.loc_addr = loopback->loc_addr; event.cm_info.rem_port = loopback->rem_port; event.cm_info.loc_port = loopback->loc_port; event.cm_info.cm_id = loopback->cm_id; cm_event_mpa_reject(&event); rem_ref_cm_node(cm_core, cm_node); loopback->state = NES_CM_STATE_CLOSING; cm_id = loopback->cm_id; rem_ref_cm_node(cm_core, loopback); cm_id->rem_ref(cm_id); } } 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: cleanup_retrans_entry(cm_node); send_reset(cm_node, NULL); break; case NES_CM_STATE_MPAREJ_RCVD: case NES_CM_STATE_UNKNOWN: case NES_CM_STATE_INITED: case NES_CM_STATE_CLOSED: case NES_CM_STATE_LISTENER_DESTROYED: 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) { if (cm_node->nesqp->pau_mode) nes_queue_mgt_skbs(skb, nesvnic, cm_node->nesqp); else { 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); timer_setup(&cm_core->tcp_timer, nes_cm_timer_tick, 0); 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 = alloc_ordered_workqueue("nesewq", 0); if (!cm_core->event_wq) goto out_free_cmcore; cm_core->post_event = nes_cm_post_event; nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n"); cm_core->disconn_wq = alloc_ordered_workqueue("nesdwq", 0); if (!cm_core->disconn_wq) goto out_free_wq; print_core(cm_core); return cm_core; out_free_wq: destroy_workqueue(cm_core->event_wq); out_free_cmcore: kfree(cm_core); return NULL; } /** * 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->misc2 |= cpu_to_le32( cm_node->tos << NES_QPCONTEXT_MISC2_TOS_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) { struct disconn_work *work; work = kzalloc(sizeof *work, GFP_ATOMIC); if (!work) return -ENOMEM; /* Timer will clean up */ nes_add_ref(&nesqp->ibqp); work->nesqp = nesqp; INIT_WORK(&work->work, nes_disconnect_worker); queue_work(g_cm_core->disconn_wq, &work->work); return 0; } /** * nes_disconnect_worker */ static void nes_disconnect_worker(struct work_struct *work) { struct disconn_work *dwork = container_of(work, struct disconn_work, work); struct nes_qp *nesqp = dwork->nesqp; kfree(dwork); 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_rem_ref(&nesqp->ibqp); } /** * 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; int disconn_status = 0; int issue_disconn = 0; int issue_close = 0; int issue_flush = 0; u32 flush_q = NES_CQP_FLUSH_RQ; struct ib_event ibevent; 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; if (nesqp->term_flags) { issue_disconn = 1; issue_close = 1; nesqp->cm_id = NULL; del_timer(&nesqp->terminate_timer); if (nesqp->flush_issued == 0) { nesqp->flush_issued = 1; issue_flush = 1; } } else 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))) { issue_disconn = 1; if (last_ae == NES_AEQE_AEID_LLP_CONNECTION_RESET) disconn_status = -ECONNRESET; } if (((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))) { issue_close = 1; nesqp->cm_id = NULL; if (nesqp->flush_issued == 0) { nesqp->flush_issued = 1; issue_flush = 1; } } spin_unlock_irqrestore(&nesqp->lock, flags); if ((issue_flush) && (nesqp->destroyed == 0)) { /* Flush the queue(s) */ if (nesqp->hw_iwarp_state >= NES_AEQE_IWARP_STATE_TERMINATE) flush_q |= NES_CQP_FLUSH_SQ; flush_wqes(nesvnic->nesdev, nesqp, flush_q, 1); if (nesqp->term_flags) { ibevent.device = nesqp->ibqp.device; ibevent.event = nesqp->terminate_eventtype; ibevent.element.qp = &nesqp->ibqp; if (nesqp->ibqp.event_handler) nesqp->ibqp.event_handler(&ibevent, nesqp->ibqp.qp_context); } } if ((cm_id) && (cm_id->event_handler)) { if (issue_disconn) { atomic_inc(&cm_disconnects); cm_event.event = IW_CM_EVENT_DISCONNECT; cm_event.status = disconn_status; cm_event.local_addr = cm_id->m_local_addr; cm_event.remote_addr = cm_id->m_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)); 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); } if (issue_close) { atomic_inc(&cm_closes); 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 = 0; cm_event.provider_data = cm_id->provider_data; cm_event.local_addr = cm_id->m_local_addr; cm_event.remote_addr = cm_id->m_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); } } 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; struct nes_ib_device *nesibdev; nesvnic = to_nesvnic(nesqp->ibqp.device); if (!nesvnic) return -EINVAL; nesdev = nesvnic->nesdev; nesibdev = nesvnic->nesibdev; nes_debug(NES_DBG_CM, "netdev refcnt = %u.\n", netdev_refcnt_read(nesvnic->netdev)); 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) { if (nesqp->lsmm_mr) nesibdev->ibdev.ops.dereg_mr(nesqp->lsmm_mr); pci_free_consistent(nesdev->pcidev, nesqp->private_data_len + nesqp->ietf_frame_size, 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; struct ib_mr *ibmr = NULL; struct nes_pd *nespd; u64 tagged_offset; u8 mpa_frame_offset = 0; struct ietf_mpa_v2 *mpa_v2_frame; u8 start_addr = 0; u8 *start_ptr = &start_addr; u8 **start_buff = &start_ptr; u16 buff_len = 0; struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr; struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; 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); if (NES_CM_STATE_LISTENER_DESTROYED == cm_node->state) { if (cm_node->loopbackpartner) rem_ref_cm_node(cm_node->cm_core, cm_node->loopbackpartner); rem_ref_cm_node(cm_node->cm_core, cm_node); return -EINVAL; } passive_state = atomic_add_return(1, &cm_node->passive_state); if (passive_state == NES_SEND_RESET_EVENT) { rem_ref_cm_node(cm_node->cm_core, cm_node); return -ECONNRESET; } /* associate the node with the QP */ nesqp->cm_node = (void *)cm_node; cm_node->nesqp = nesqp; 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", netdev_refcnt_read(nesvnic->netdev)); nesqp->ietf_frame_size = sizeof(struct ietf_mpa_v2); /* allocate the ietf frame and space for private data */ nesqp->ietf_frame = pci_alloc_consistent(nesdev->pcidev, nesqp->ietf_frame_size + 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; } mpa_v2_frame = (struct ietf_mpa_v2 *)nesqp->ietf_frame; if (cm_node->mpa_frame_rev == IETF_MPA_V1) mpa_frame_offset = 4; if (cm_node->mpa_frame_rev == IETF_MPA_V1 || cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord); } memcpy(mpa_v2_frame->priv_data, conn_param->private_data, conn_param->private_data_len); cm_build_mpa_frame(cm_node, start_buff, &buff_len, nesqp->ietf_frame, MPA_KEY_REPLY); nesqp->private_data_len = conn_param->private_data_len; /* setup our first outgoing iWarp send WQE (the IETF frame response) */ wqe = &nesqp->hwqp.sq_vbase[0]; if (raddr->sin_addr.s_addr != laddr->sin_addr.s_addr) { u64temp = (unsigned long)nesqp; nespd = nesqp->nespd; tagged_offset = (u64)(unsigned long)*start_buff; ibmr = nes_reg_phys_mr(&nespd->ibpd, nesqp->ietf_frame_pbase + mpa_frame_offset, buff_len, IB_ACCESS_LOCAL_WRITE, &tagged_offset); if (IS_ERR(ibmr)) { nes_debug(NES_DBG_CM, "Unable to register memory region" "for lSMM for cm_node = %p \n", cm_node); pci_free_consistent(nesdev->pcidev, nesqp->private_data_len + nesqp->ietf_frame_size, nesqp->ietf_frame, nesqp->ietf_frame_pbase); return PTR_ERR(ibmr); } ibmr->pd = &nespd->ibpd; ibmr->device = nespd->ibpd.device; nesqp->lsmm_mr = ibmr; 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(buff_len); set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX, (u64)(unsigned long)(*start_buff)); wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = cpu_to_le32(buff_len); wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey; if (nesqp->sq_kmapped) { nesqp->sq_kmapped = 0; kunmap(nesqp->page); } 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_WRPDU); } 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(cm_node->loc_port); nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(cm_node->rem_port); nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->rem_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)cm_node->ord_size); memset(&nes_quad, 0, sizeof(nes_quad)); nes_quad.DstIpAdrIndex = cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); nes_quad.SrcIpadr = htonl(cm_node->rem_addr); nes_quad.TcpPorts[0] = htons(cm_node->rem_port); nes_quad.TcpPorts[1] = htons(cm_node->loc_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=%u.\n", nesqp->hwqp.qp_id, ntohl(raddr->sin_addr.s_addr), ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr), ntohs(laddr->sin_port), le32_to_cpu(nesqp->nesqp_context->rcv_nxt), le32_to_cpu(nesqp->nesqp_context->snd_nxt), buff_len); /* notify OF layer that accept event was successful */ cm_id->add_ref(cm_id); nes_add_ref(&nesqp->ibqp); cm_event.event = IW_CM_EVENT_ESTABLISHED; cm_event.status = 0; cm_event.provider_data = (void *)nesqp; cm_event.local_addr = cm_id->m_local_addr; cm_event.remote_addr = cm_id->m_remote_addr; cm_event.private_data = NULL; cm_event.private_data_len = 0; cm_event.ird = cm_node->ird_size; cm_event.ord = cm_node->ord_size; 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, conn_param->private_data, conn_param->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); 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_node *loopback; struct nes_cm_core *cm_core; u8 *start_buff; atomic_inc(&cm_rejects); cm_node = (struct nes_cm_node *)cm_id->provider_data; loopback = cm_node->loopbackpartner; cm_core = cm_node->cm_core; cm_node->cm_id = cm_id; if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER) return -EINVAL; if (loopback) { memcpy(&loopback->mpa_frame.priv_data, pdata, pdata_len); loopback->mpa_frame.priv_data_len = pdata_len; loopback->mpa_frame_size = pdata_len; } else { start_buff = &cm_node->mpa_frame_buf[0] + sizeof(struct ietf_mpa_v2); cm_node->mpa_frame_size = pdata_len; memcpy(start_buff, pdata, pdata_len); } return cm_core->api->reject(cm_core, cm_node); } /** * 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; int apbvt_set = 0; struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr; struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; if (cm_id->remote_addr.ss_family != AF_INET) return -ENOSYS; 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; if (!laddr->sin_port || !raddr->sin_port) 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(raddr->sin_addr.s_addr), ntohs(raddr->sin_port), ntohl(laddr->sin_addr.s_addr), ntohs(laddr->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; 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); /* set up the connection params for the node */ cm_info.loc_addr = ntohl(laddr->sin_addr.s_addr); cm_info.loc_port = ntohs(laddr->sin_port); cm_info.rem_addr = ntohl(raddr->sin_addr.s_addr); cm_info.rem_port = ntohs(raddr->sin_port); cm_info.cm_id = cm_id; cm_info.conn_type = NES_CM_IWARP_CONN_TYPE; if (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr) { nes_manage_apbvt(nesvnic, cm_info.loc_port, PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_ADD); apbvt_set = 1; } 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 (apbvt_set) nes_manage_apbvt(nesvnic, cm_info.loc_port, PCI_FUNC(nesdev->pcidev->devfn), NES_MANAGE_APBVT_DEL); nes_debug(NES_DBG_NLMSG, "Delete loc_port = %04X\n", cm_info.loc_port); cm_id->rem_ref(cm_id); return -ENOMEM; } record_ird_ord(cm_node, (u16)conn_param->ird, (u16)conn_param->ord); if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO && cm_node->ord_size == 0) cm_node->ord_size = 1; cm_node->apbvt_set = apbvt_set; cm_node->tos = cm_id->tos; 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; int err; struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr; nes_debug(NES_DBG_CM, "cm_id = %p, local port = 0x%04X.\n", cm_id, ntohs(laddr->sin_port)); if (cm_id->m_local_addr.ss_family != AF_INET) return -ENOSYS; nesvnic = to_nesvnic(cm_id->device); if (!nesvnic) return -EINVAL; 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, laddr->sin_addr.s_addr); /* setup listen params in our api call struct */ cm_info.loc_addr = ntohl(nesvnic->local_ipaddr); cm_info.loc_port = ntohs(laddr->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; cm_node->tos = cm_id->tos; if (!cm_node->reused_node) { err = nes_manage_apbvt(nesvnic, cm_node->loc_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; } atomic_inc(&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) { 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_v4_quad nes_quad; u32 crc_value; int ret; struct sockaddr_in *laddr; struct sockaddr_in *raddr; struct sockaddr_in *cm_event_laddr; /* 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; laddr = (struct sockaddr_in *)&cm_id->m_local_addr; raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; cm_event_laddr = (struct sockaddr_in *)&cm_event.local_addr; 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(raddr->sin_addr.s_addr), ntohs(raddr->sin_port), ntohs(laddr->sin_port), jiffies); nes_cm_init_tsa_conn(nesqp, cm_node); /* set the QP tsa context */ nesqp->nesqp_context->tcpPorts[0] = cpu_to_le16(cm_node->loc_port); nesqp->nesqp_context->tcpPorts[1] = cpu_to_le16(cm_node->rem_port); nesqp->nesqp_context->ip0 = cpu_to_le32(cm_node->rem_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)cm_node->ord_size); /* Adjust tail for not having a LSMM */ /*nesqp->hwqp.sq_tail = 1;*/ build_rdma0_msg(cm_node, &nesqp); nes_write32(nesdev->regs + NES_WQE_ALLOC, (1 << 24) | 0x00800000 | nesqp->hwqp.qp_id); memset(&nes_quad, 0, sizeof(nes_quad)); nes_quad.DstIpAdrIndex = cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24); nes_quad.SrcIpadr = htonl(cm_node->rem_addr); nes_quad.TcpPorts[0] = htons(cm_node->rem_port); nes_quad.TcpPorts[1] = htons(cm_node->loc_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 = 0; cm_event.provider_data = cm_id->provider_data; cm_event_laddr->sin_family = AF_INET; cm_event_laddr->sin_port = laddr->sin_port; cm_event.remote_addr = cm_id->m_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.ird = cm_node->ird_size; cm_event.ord = cm_node->ord_size; cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_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 = -ECONNRESET; cm_event.provider_data = cm_id->provider_data; cm_event.local_addr = cm_id->m_local_addr; cm_event.remote_addr = cm_id->m_remote_addr; cm_event.private_data = NULL; cm_event.private_data_len = 0; #ifdef CONFIG_INFINIBAND_NES_DEBUG { struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *) &cm_event.local_addr; struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *) &cm_event.remote_addr; nes_debug(NES_DBG_CM, "call CM_EVENT REJECTED, local_addr=%08x, remote_addr=%08x\n", cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr); } #endif 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; if (!nesqp) return; nesqp->cm_id = NULL; /* cm_id->provider_data = NULL; */ cm_event.event = IW_CM_EVENT_DISCONNECT; cm_event.status = -ECONNRESET; cm_event.provider_data = cm_id->provider_data; cm_event.local_addr = cm_id->m_local_addr; cm_event.remote_addr = cm_id->m_remote_addr; cm_event.private_data = NULL; cm_event.private_data_len = 0; cm_id->add_ref(cm_id); ret = cm_id->event_handler(cm_id, &cm_event); atomic_inc(&cm_closes); cm_event.event = IW_CM_EVENT_CLOSE; cm_event.status = 0; cm_event.provider_data = cm_id->provider_data; cm_event.local_addr = cm_id->m_local_addr; cm_event.remote_addr = cm_id->m_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; struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *) &cm_event.local_addr; struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *) &cm_event.remote_addr; 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 = 0; cm_event.provider_data = (void *)cm_node; cm_event_laddr->sin_family = AF_INET; cm_event_laddr->sin_port = htons(event->cm_info.loc_port); cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr); cm_event_raddr->sin_family = AF_INET; cm_event_raddr->sin_port = htons(event->cm_info.rem_port); cm_event_raddr->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; if (cm_node->mpa_frame_rev == IETF_MPA_V1) { cm_event.ird = NES_MAX_IRD; cm_event.ord = NES_MAX_ORD; } else { cm_event.ird = cm_node->ird_size; cm_event.ord = cm_node->ord_size; } ret = cm_id->event_handler(cm_id, &cm_event); if (ret) printk(KERN_ERR "%s[%u] OFA CM event_handler returned, ret=%d\n", __func__, __LINE__, ret); return; } static void cm_event_mpa_reject(struct nes_cm_event *event) { struct iw_cm_id *cm_id; struct iw_cm_event cm_event; struct nes_cm_node *cm_node; int ret; struct sockaddr_in *cm_event_laddr = (struct sockaddr_in *) &cm_event.local_addr; struct sockaddr_in *cm_event_raddr = (struct sockaddr_in *) &cm_event.remote_addr; 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_REPLY; cm_event.status = -ECONNREFUSED; cm_event.provider_data = cm_id->provider_data; cm_event_laddr->sin_family = AF_INET; cm_event_laddr->sin_port = htons(event->cm_info.loc_port); cm_event_laddr->sin_addr.s_addr = htonl(event->cm_info.loc_addr); cm_event_raddr->sin_family = AF_INET; cm_event_raddr->sin_port = htons(event->cm_info.rem_port); cm_event_raddr->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; nes_debug(NES_DBG_CM, "call CM_EVENT_MPA_REJECTED, local_addr=%08x, " "remove_addr=%08x\n", cm_event_laddr->sin_addr.s_addr, cm_event_raddr->sin_addr.s_addr); ret = cm_id->event_handler(cm_id, &cm_event); if (ret) printk(KERN_ERR "%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_MPA_REJECT: if ((!event->cm_node->cm_id) || (event->cm_node->state == NES_CM_STATE_TSA)) break; cm_event_mpa_reject(event); nes_debug(NES_DBG_CM, "CM Event: REJECT\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; }
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