diff options
Diffstat (limited to 'drivers/infiniband/hw/nes/nes_cm.c')
| -rw-r--r-- | drivers/infiniband/hw/nes/nes_cm.c | 3992 |
1 files changed, 0 insertions, 3992 deletions
diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c deleted file mode 100644 index 62bf986eba67..000000000000 --- a/drivers/infiniband/hw/nes/nes_cm.c +++ /dev/null @@ -1,3992 +0,0 @@ -/* - * 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_gw4)); - - 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, - NULL); - 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; -} |