From patchwork Wed Dec 16 19:58:27 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Faisal Latif X-Patchwork-Id: 7865981 Return-Path: X-Original-To: patchwork-linux-rdma@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 1BBA8BEEE1 for ; Wed, 16 Dec 2015 20:01:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 39A0620219 for ; Wed, 16 Dec 2015 20:01:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F3988203EC for ; Wed, 16 Dec 2015 20:01:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966585AbbLPT7l (ORCPT ); Wed, 16 Dec 2015 14:59:41 -0500 Received: from mga11.intel.com ([192.55.52.93]:64830 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754803AbbLPT72 (ORCPT ); Wed, 16 Dec 2015 14:59:28 -0500 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga102.fm.intel.com with ESMTP; 16 Dec 2015 11:59:27 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,438,1444719600"; d="scan'208";a="862253575" Received: from flatif-mobl1.amr.corp.intel.com ([10.122.74.136]) by fmsmga001.fm.intel.com with ESMTP; 16 Dec 2015 11:59:25 -0800 From: Faisal Latif To: dledford@redhat.com Cc: linux-rdma@vger.kernel.org, netdev@vger.kernel.org, jeffrey.t.kirsher@intel.com, e1000-rdma@lists.sourceforge.net, faisal.latif@intel.com Subject: [PATCH 03/15] i40iw: add connection management code Date: Wed, 16 Dec 2015 13:58:27 -0600 Message-Id: <1450295919-17292-4-git-send-email-faisal.latif@intel.com> X-Mailer: git-send-email 2.5.3 In-Reply-To: <1450295919-17292-3-git-send-email-faisal.latif@intel.com> References: <1450295919-17292-1-git-send-email-faisal.latif@intel.com> <1450295919-17292-2-git-send-email-faisal.latif@intel.com> <1450295919-17292-3-git-send-email-faisal.latif@intel.com> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP i40iw_cm.c i40iw_cm.h are used for connection management. Acked-by: Anjali Singhai Jain Acked-by: Shannon Nelson Signed-off-by: Faisal Latif --- drivers/infiniband/hw/i40iw/i40iw_cm.c | 4447 ++++++++++++++++++++++++++++++++ drivers/infiniband/hw/i40iw/i40iw_cm.h | 456 ++++ 2 files changed, 4903 insertions(+) create mode 100644 drivers/infiniband/hw/i40iw/i40iw_cm.c create mode 100644 drivers/infiniband/hw/i40iw/i40iw_cm.h diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.c b/drivers/infiniband/hw/i40iw/i40iw_cm.c new file mode 100644 index 0000000..aa6263f --- /dev/null +++ b/drivers/infiniband/hw/i40iw/i40iw_cm.c @@ -0,0 +1,4447 @@ +/******************************************************************************* +* +* Copyright (c) 2015 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 +* OpenFabrics.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. +* +*******************************************************************************/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "i40iw.h" + +static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *); +static void i40iw_cm_post_event(struct i40iw_cm_event *event); +static void i40iw_disconnect_worker(struct work_struct *work); + +/** + * i40iw_free_sqbuf - put back puda buffer if refcount = 0 + * @dev: FPK device + * @buf: puda buffer to free + */ +void i40iw_free_sqbuf(struct i40iw_sc_dev *dev, void *bufp) +{ + struct i40iw_puda_buf *buf = (struct i40iw_puda_buf *)bufp; + struct i40iw_puda_rsrc *ilq = dev->ilq; + + if (!atomic_dec_return(&buf->refcount)) + i40iw_puda_ret_bufpool(ilq, buf); +} + +/** + * i40iw_derive_hw_ird_setting - Calculate IRD + * + * @cm_ird: IRD of connection's node + * + * The ird from the connection is rounded to a supported HW + * setting (2,8,32,64) and then encoded for ird_size field of + * qp_ctx + */ +static u8 i40iw_derive_hw_ird_setting(u16 cm_ird) +{ + u8 encoded_ird_size = 0; + u8 pof2_cm_ird = 1; + + /* round-off to next powerof2 */ + while (pof2_cm_ird < cm_ird) + pof2_cm_ird *= 2; + + /* ird_size field is encoded in qp_ctx */ + switch (pof2_cm_ird) { + case I40IW_HW_IRD_SETTING_64: + encoded_ird_size = 3; + break; + case I40IW_HW_IRD_SETTING_32: + case I40IW_HW_IRD_SETTING_16: + encoded_ird_size = 2; + break; + case I40IW_HW_IRD_SETTING_8: + case I40IW_HW_IRD_SETTING_4: + encoded_ird_size = 1; + break; + case I40IW_HW_IRD_SETTING_2: + default: + encoded_ird_size = 0; + break; + } + return encoded_ird_size; +} + +/** + * i40iw_record_ird_ord - Record IRD/ORD passed in + * @cm_node: connection's node + * @conn_ird: connection IRD + * @conn_ord: connection ORD + */ +static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u16 conn_ird, u16 conn_ord) +{ + if (conn_ird > I40IW_MAX_IRD_SIZE) + conn_ird = I40IW_MAX_IRD_SIZE; + + if (conn_ord > I40IW_MAX_ORD_SIZE) + conn_ord = I40IW_MAX_ORD_SIZE; + + cm_node->ird_size = conn_ird; + cm_node->ord_size = conn_ord; +} + +/** + * i40iw_copy_ip_ntohl - change network to host ip + * @dst: host ip + * @src: big endian + */ +void i40iw_copy_ip_ntohl(u32 *dst, __be32 *src) +{ + *dst++ = ntohl(*src++); + *dst++ = ntohl(*src++); + *dst++ = ntohl(*src++); + *dst = ntohl(*src); +} + +/** + * i40iw_copy_ip_htonl - change host addr to network ip + * @dst: host ip + * @src: little endian + */ +static inline void i40iw_copy_ip_htonl(__be32 *dst, u32 *src) +{ + *dst++ = htonl(*src++); + *dst++ = htonl(*src++); + *dst++ = htonl(*src++); + *dst = htonl(*src); +} + +/** + * i40iw_fill_sockaddr4 - get addr info for passive connection + * @cm_node: connection's node + * @event: upper layer's cm event + */ +static inline void i40iw_fill_sockaddr4(struct i40iw_cm_node *cm_node, + struct iw_cm_event *event) +{ + struct sockaddr_in *laddr = (struct sockaddr_in *)&event->local_addr; + struct sockaddr_in *raddr = (struct sockaddr_in *)&event->remote_addr; + + laddr->sin_family = AF_INET; + raddr->sin_family = AF_INET; + + laddr->sin_port = htons(cm_node->loc_port); + raddr->sin_port = htons(cm_node->rem_port); + + laddr->sin_addr.s_addr = htonl(cm_node->loc_addr[0]); + raddr->sin_addr.s_addr = htonl(cm_node->rem_addr[0]); +} + +/** + * i40iw_fill_sockaddr6 - get ipv6 addr info for passive side + * @cm_node: connection's node + * @event: upper layer's cm event + */ +static inline void i40iw_fill_sockaddr6(struct i40iw_cm_node *cm_node, + struct iw_cm_event *event) +{ + struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)&event->local_addr; + struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)&event->remote_addr; + + laddr6->sin6_family = AF_INET6; + raddr6->sin6_family = AF_INET6; + + laddr6->sin6_port = htons(cm_node->loc_port); + raddr6->sin6_port = htons(cm_node->rem_port); + + i40iw_copy_ip_htonl(laddr6->sin6_addr.in6_u.u6_addr32, + cm_node->loc_addr); + i40iw_copy_ip_htonl(raddr6->sin6_addr.in6_u.u6_addr32, + cm_node->rem_addr); +} + +/** + * i40iw_set_sockaddr - Record ip addr and tcp port in a sockaddr storage + * @ip_addr: v4/v6 ip addr + * @port: tcp port + * @addr: sockaddr to store ip/tcp info + */ +static void i40iw_set_sockaddr(u32 *ip_addr, + u16 port, + struct sockaddr_storage *addr, + bool ipv4) +{ + if (ipv4) { + struct sockaddr_in *in4_addr = (struct sockaddr_in *)addr; + + in4_addr->sin_family = AF_INET; + in4_addr->sin_addr.s_addr = htonl(ip_addr[0]); + in4_addr->sin_port = htons(port); + } else { + struct sockaddr_in6 *in6_addr = (struct sockaddr_in6 *)addr; + + in6_addr->sin6_family = AF_INET6; + i40iw_copy_ip_htonl(in6_addr->sin6_addr.in6_u.u6_addr32, + ip_addr); + in6_addr->sin6_port = htons(port); + } +} + +/** + * i40iw_get_sockaddr - Get ip addr and tcp port from a sockaddr storage + * @addr: sockaddr to get ip/tcp info + * @ip_addr: v4/v6 ip addr + * @port: tcp port + */ +static void i40iw_get_addrinfo(struct sockaddr_storage *addr, u32 *ip_addr, u16 *port) +{ + if (addr->ss_family == AF_INET) { + struct sockaddr_in *in4_addr = (struct sockaddr_in *)addr; + + ip_addr[0] = ntohl(in4_addr->sin_addr.s_addr); + *port = ntohs(in4_addr->sin_port); + } else { + struct sockaddr_in6 *in6_addr = (struct sockaddr_in6 *)addr; + + i40iw_copy_ip_ntohl(ip_addr, + in6_addr->sin6_addr.in6_u.u6_addr32); + *port = ntohs(in6_addr->sin6_port); + } +} + +/** + * i40iw_is_wildcard - Check if it is a wildcard ip address + * @addr: sockaddr containing the ip to check + */ +static bool i40iw_is_wildcard(struct sockaddr_storage *addr) +{ + if (addr->ss_family == AF_INET) { + struct sockaddr_in *in4_addr = (struct sockaddr_in *)addr; + + return (in4_addr->sin_addr.s_addr == INADDR_ANY); + } else { + struct sockaddr_in6 *in6_addr = (struct sockaddr_in6 *)addr; + + return (ipv6_addr_type(&in6_addr->sin6_addr) == IPV6_ADDR_ANY); + } +} + +/** + * i40iw_create_mapinfo - Create a mapinfo object in the port mapper data base + * @cm_info: contains ip/tcp info + */ +static int i40iw_create_mapinfo(struct i40iw_cm_info *cm_info) +{ + struct sockaddr_storage local_sockaddr; + struct sockaddr_storage mapped_sockaddr; + + i40iw_set_sockaddr(cm_info->loc_addr, cm_info->loc_port, + &local_sockaddr, cm_info->ipv4); + i40iw_set_sockaddr(cm_info->map_loc_addr, cm_info->map_loc_port, + &mapped_sockaddr, cm_info->ipv4); + return iwpm_create_mapinfo(&local_sockaddr, + &mapped_sockaddr, + RDMA_NL_I40IW); +} + +/** + * i40iw_remove_mapinfo - Remove a mapinfo object + * @cm_info: contains ip/tcp info + * + * Removes a mapinfo object from the port mapper data base + * and sends a remove mapping message to the userspace port mapper + */ +static int i40iw_remove_mapinfo(struct i40iw_cm_info *cm_info) +{ + struct sockaddr_storage local_sockaddr; + struct sockaddr_storage mapped_sockaddr; + + i40iw_set_sockaddr(cm_info->loc_addr, cm_info->loc_port, + &local_sockaddr, cm_info->ipv4); + i40iw_set_sockaddr(cm_info->map_loc_addr, cm_info->map_loc_port, + &mapped_sockaddr, cm_info->ipv4); + + iwpm_remove_mapinfo(&local_sockaddr, &mapped_sockaddr); + return iwpm_remove_mapping(&local_sockaddr, RDMA_NL_I40IW); +} + +/** + * i40iw_form_reg_msg - Form a port mapper message with dev info + * @iwdev: iWarp device + * @pm_msg: msg to record device data + */ +static void i40iw_form_reg_msg(struct i40iw_device *iwdev, struct iwpm_dev_data *pm_msg) +{ + memcpy(pm_msg->dev_name, iwdev->iwibdev->ibdev.name, IWPM_DEVNAME_SIZE); + memcpy(pm_msg->if_name, iwdev->netdev->name, IWPM_IFNAME_SIZE); +} + +/** + * i40iw_form_pm_msg - Form a port mapper message with mapping info + * @cm_info: contains ip/tcp info + * @pm_msg: msg to record ip/tcp info + */ +static void i40iw_form_pm_msg(struct i40iw_cm_info *cm_info, + struct iwpm_sa_data *pm_msg) +{ + i40iw_set_sockaddr(cm_info->loc_addr, cm_info->loc_port, + &pm_msg->loc_addr, cm_info->ipv4); + i40iw_set_sockaddr(cm_info->rem_addr, cm_info->rem_port, + &pm_msg->rem_addr, cm_info->ipv4); +} + +/** + * i40iw_record_pm_msg - Record the received mapping info + * @cm_info: ip/tcp info to be updated with mapped info + * @pm_msg: received msg with mapped ip/tcp + */ +static void i40iw_record_pm_msg(struct i40iw_cm_info *cm_info, + struct iwpm_sa_data *pm_msg, + bool remote) +{ + i40iw_get_addrinfo(&pm_msg->mapped_loc_addr, + cm_info->map_loc_addr, + &cm_info->map_loc_port); + if (remote) { + i40iw_get_addrinfo(&pm_msg->mapped_rem_addr, + cm_info->map_rem_addr, &cm_info->map_rem_port); + if (i40iw_is_wildcard(&pm_msg->mapped_rem_addr)) + memcpy(cm_info->map_rem_addr, cm_info->rem_addr, + sizeof(cm_info->map_rem_addr)); + } +} + +/** + * i40iw_get_reminfo - Get the address info of the remote connecting peer + * @cm_node: provides mapped ip/tcp info (local and remote) + * + * Gets the actual non-mapped ip/tcp info of the remote connecting peer + * from the port mapper data base + */ +static int i40iw_get_remote_addr(struct i40iw_cm_node *cm_node) +{ + struct sockaddr_storage mapped_loc_addr, mapped_rem_addr; + struct sockaddr_storage remote_addr; + int ret; + + i40iw_set_sockaddr(cm_node->map_loc_addr, + cm_node->map_loc_port, + &mapped_loc_addr, + cm_node->ipv4); + i40iw_set_sockaddr(cm_node->map_rem_addr, + cm_node->map_rem_port, + &mapped_rem_addr, + cm_node->ipv4); + ret = iwpm_get_remote_info(&mapped_loc_addr, + &mapped_rem_addr, + &remote_addr, + RDMA_NL_I40IW); + if (ret) + i40iw_debug(cm_node->dev, + I40IW_DEBUG_CM, + "Unable to find remote peer address info\n"); + else + i40iw_get_addrinfo(&remote_addr, + cm_node->rem_addr, + &cm_node->rem_port); + return ret; +} + +/** + * i40iw_init_mapinfo - Initialize the mapped ip/tcp info + * @cm_info: ip/tcp info (actual and mapped) +*/ +static void i40iw_init_mapinfo(struct i40iw_cm_info *cm_info) +{ + memcpy(cm_info->map_loc_addr, cm_info->loc_addr, + sizeof(cm_info->map_loc_addr)); + memcpy(cm_info->map_rem_addr, cm_info->rem_addr, + sizeof(cm_info->map_rem_addr)); + cm_info->map_loc_port = cm_info->loc_port; + cm_info->map_rem_port = cm_info->rem_port; +} + +/** + * i40iw_get_addr_info + * @cm_node: contains ip/tcp info + * @cm_info: to get a copy of the cm_node ip/tcp info +*/ +static void i40iw_get_addr_info(struct i40iw_cm_node *cm_node, + struct i40iw_cm_info *cm_info) +{ + cm_info->ipv4 = cm_node->ipv4; + cm_info->vlan_id = cm_node->vlan_id; + memcpy(cm_info->loc_addr, cm_node->loc_addr, sizeof(cm_info->loc_addr)); + memcpy(cm_info->rem_addr, cm_node->rem_addr, sizeof(cm_info->rem_addr)); + memcpy(cm_info->map_loc_addr, cm_node->map_loc_addr, sizeof(cm_info->map_loc_addr)); + memcpy(cm_info->map_rem_addr, cm_node->map_rem_addr, sizeof(cm_info->map_rem_addr)); + cm_info->loc_port = cm_node->loc_port; + cm_info->rem_port = cm_node->rem_port; + cm_info->map_loc_port = cm_node->map_loc_port; + cm_info->map_rem_port = cm_node->map_rem_port; +} + +/** + * i40iw_get_cmevent_info - for cm event upcall + * @cm_node: connection's node + * @cm_id: upper layers cm struct for the event + * @event: upper layer's cm event + */ +static inline void i40iw_get_cmevent_info(struct i40iw_cm_node *cm_node, + struct iw_cm_id *cm_id, + struct iw_cm_event *event) +{ + memcpy(&event->local_addr, &cm_id->local_addr, + sizeof(event->local_addr)); + memcpy(&event->remote_addr, &cm_id->remote_addr, + sizeof(event->remote_addr)); + if (cm_node) { + event->private_data = (void *)cm_node->pdata_buf; + event->private_data_len = (u8)cm_node->pdata.size; + event->ird = cm_node->ird_size; + event->ord = cm_node->ord_size; + } +} + +/** + * i40iw_send_cm_event - upcall cm's event handler + * @cm_node: connection's node + * @cm_id: upper layer's cm info struct + * @type: Event type to indicate + * @status: status for the event type + */ +static int i40iw_send_cm_event(struct i40iw_cm_node *cm_node, + struct iw_cm_id *cm_id, + enum iw_cm_event_type type, + int status) +{ + struct iw_cm_event event; + + memset(&event, 0, sizeof(event)); + event.event = type; + event.status = status; + switch (type) { + case IW_CM_EVENT_CONNECT_REQUEST: + if (cm_node->ipv4) + i40iw_fill_sockaddr4(cm_node, &event); + else + i40iw_fill_sockaddr6(cm_node, &event); + event.provider_data = (void *)cm_node; + event.private_data = (void *)cm_node->pdata_buf; + event.private_data_len = (u8)cm_node->pdata.size; + break; + case IW_CM_EVENT_CONNECT_REPLY: + i40iw_get_cmevent_info(cm_node, cm_id, &event); + break; + case IW_CM_EVENT_ESTABLISHED: + event.ird = cm_node->ird_size; + event.ord = cm_node->ord_size; + break; + case IW_CM_EVENT_DISCONNECT: + break; + case IW_CM_EVENT_CLOSE: + break; + default: + i40iw_pr_err("event type received type = %d\n", type); + return -1; + } + return cm_id->event_handler(cm_id, &event); +} + +/** + * i40iw_create_event - create cm event + * @cm_node: connection's node + * @type: Event type to generate + */ +static struct i40iw_cm_event *i40iw_create_event(struct i40iw_cm_node *cm_node, + enum i40iw_cm_event_type type) +{ + struct i40iw_cm_event *event; + + if (!cm_node->cm_id) + return NULL; + + event = kzalloc(sizeof(*event), GFP_ATOMIC); + + if (!event) + return NULL; + + event->type = type; + event->cm_node = cm_node; + memcpy(event->cm_info.rem_addr, cm_node->rem_addr, sizeof(event->cm_info.rem_addr)); + memcpy(event->cm_info.loc_addr, cm_node->loc_addr, sizeof(event->cm_info.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; + + i40iw_debug(cm_node->dev, + I40IW_DEBUG_CM, + "node=%p event=%p type=%u dst=%pI4 src=%pI4\n", + cm_node, + event, + type, + event->cm_info.loc_addr, + event->cm_info.rem_addr); + + i40iw_cm_post_event(event); + return event; +} + +/** + * i40iw_free_retrans_entry - free send entry + * @cm_node: connection's node + */ +static void i40iw_free_retrans_entry(struct i40iw_cm_node *cm_node) +{ + struct i40iw_sc_dev *dev = cm_node->dev; + struct i40iw_timer_entry *send_entry; + + send_entry = cm_node->send_entry; + if (send_entry) { + cm_node->send_entry = NULL; + i40iw_free_sqbuf(dev, (void *)send_entry->sqbuf); + kfree(send_entry); + atomic_dec(&cm_node->ref_count); + } +} + +/** + * i40iw_cleanup_retrans_entry - free send entry with lock + * @cm_node: connection's node + */ +static void i40iw_cleanup_retrans_entry(struct i40iw_cm_node *cm_node) +{ + unsigned long flags; + + spin_lock_irqsave(&cm_node->retrans_list_lock, flags); + i40iw_free_retrans_entry(cm_node); + spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); +} + +static bool is_remote_ne020_or_chelsio(struct i40iw_cm_node *cm_node) +{ + if ((cm_node->rem_mac[0] == 0x0) && + (((cm_node->rem_mac[1] == 0x12) && (cm_node->rem_mac[2] == 0x55)) || + ((cm_node->rem_mac[1] == 0x07 && (cm_node->rem_mac[2] == 0x43))))) + return true; + return false; +} + +/** + * i40iw_form_cm_frame - get a free packet and build frame + * @cm_node: connection's node ionfo to use in frame + * @options: pointer to options info + * @hdr: pointer mpa header + * @pdata: pointer to private data + * @flags: indicates FIN or ACK + */ +static struct i40iw_puda_buf *i40iw_form_cm_frame(struct i40iw_cm_node *cm_node, + struct i40iw_kmem_info *options, + struct i40iw_kmem_info *hdr, + struct i40iw_kmem_info *pdata, + u8 flags) +{ + struct i40iw_puda_buf *sqbuf; + struct i40iw_sc_dev *dev = cm_node->dev; + u8 *buf; + + struct tcphdr *tcph; + struct iphdr *iph; + struct ipv6hdr *ip6h; + struct ethhdr *ethh; + u16 packetsize; + u16 eth_hlen = ETH_HLEN; + u32 opts_len = 0; + u32 pd_len = 0; + u32 hdr_len = 0; + + sqbuf = i40iw_puda_get_bufpool(dev->ilq); + if (!sqbuf) + return NULL; + buf = sqbuf->mem.va; + + if (options) + opts_len = (u32)options->size; + + if (hdr) + hdr_len = hdr->size; + + if (pdata) { + pd_len = pdata->size; + if (!is_remote_ne020_or_chelsio(cm_node)) + pd_len += MPA_ZERO_PAD_LEN; + } + + if (cm_node->vlan_id < VLAN_TAG_PRESENT) + eth_hlen += 4; + + if (cm_node->ipv4) + packetsize = sizeof(*iph) + sizeof(*tcph); + else + packetsize = sizeof(*ip6h) + sizeof(*tcph); + packetsize += opts_len + hdr_len + pd_len; + + memset(buf, 0x00, eth_hlen + packetsize); + + sqbuf->totallen = packetsize + eth_hlen; + sqbuf->maclen = eth_hlen; + sqbuf->tcphlen = sizeof(*tcph) + opts_len; + sqbuf->scratch = (void *)cm_node; + + ethh = (struct ethhdr *)buf; + buf += eth_hlen; + + if (cm_node->ipv4) { + sqbuf->ipv4 = true; + + iph = (struct iphdr *)buf; + buf += sizeof(*iph); + tcph = (struct tcphdr *)buf; + buf += sizeof(*tcph); + + ether_addr_copy(ethh->h_dest, cm_node->rem_mac); + ether_addr_copy(ethh->h_source, cm_node->loc_mac); + if (cm_node->vlan_id < VLAN_TAG_PRESENT) { + ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); + ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id); + + ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IP); + } else { + ethh->h_proto = htons(ETH_P_IP); + } + + 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 = IPPROTO_TCP; + + iph->saddr = htonl(cm_node->map_loc_addr[0]); + iph->daddr = htonl(cm_node->map_rem_addr[0]); + } else { + sqbuf->ipv4 = false; + ip6h = (struct ipv6hdr *)buf; + buf += sizeof(*ip6h); + tcph = (struct tcphdr *)buf; + buf += sizeof(*tcph); + + ether_addr_copy(ethh->h_dest, cm_node->rem_mac); + ether_addr_copy(ethh->h_source, cm_node->loc_mac); + if (cm_node->vlan_id < VLAN_TAG_PRESENT) { + ((struct vlan_ethhdr *)ethh)->h_vlan_proto = htons(ETH_P_8021Q); + ((struct vlan_ethhdr *)ethh)->h_vlan_TCI = htons(cm_node->vlan_id); + ((struct vlan_ethhdr *)ethh)->h_vlan_encapsulated_proto = htons(ETH_P_IPV6); + } else { + ethh->h_proto = htons(ETH_P_IPV6); + } + ip6h->version = 6; + ip6h->flow_lbl[0] = 0; + ip6h->flow_lbl[1] = 0; + ip6h->flow_lbl[2] = 0; + ip6h->payload_len = htons(packetsize - sizeof(*ip6h)); + ip6h->nexthdr = 6; + ip6h->hop_limit = 128; + + i40iw_copy_ip_htonl(ip6h->saddr.in6_u.u6_addr32, + cm_node->map_loc_addr); + i40iw_copy_ip_htonl(ip6h->daddr.in6_u.u6_addr32, + cm_node->map_rem_addr); + } + + tcph->source = htons(cm_node->map_loc_port); + tcph->dest = htons(cm_node->map_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 += hdr_len + pd_len; + } + + 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) + opts_len + 3) >> 2); + sqbuf->tcphlen = tcph->doff << 2; + tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd); + tcph->urg_ptr = 0; + + if (opts_len) { + memcpy(buf, options->addr, opts_len); + buf += opts_len; + } + + if (hdr_len) { + memcpy(buf, hdr->addr, hdr_len); + buf += hdr_len; + } + + if (pd_len) + memcpy(buf, pdata->addr, pd_len); + + atomic_set(&sqbuf->refcount, 1); + + return sqbuf; +} + +/** + * i40iw_send_reset - Send RST packet + * @cm_node: connection's node + */ +static int i40iw_send_reset(struct i40iw_cm_node *cm_node) +{ + struct i40iw_puda_buf *sqbuf; + int flags = SET_RST | SET_ACK; + + sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, flags); + if (!sqbuf) { + i40iw_pr_err("no sqbuf\n"); + return -1; + } + + return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 0, 1); +} + +/** + * i40iw_active_open_err - send event for active side cm error + * @cm_node: connection's node + * @reset: Flag to send reset or not + */ +static void i40iw_active_open_err(struct i40iw_cm_node *cm_node, bool reset) +{ + i40iw_cleanup_retrans_entry(cm_node); + cm_node->cm_core->stats_connect_errs++; + if (reset) { + i40iw_debug(cm_node->dev, + I40IW_DEBUG_CM, + "%s cm_node=%p state=%d\n", + __func__, + cm_node, + cm_node->state); + atomic_inc(&cm_node->ref_count); + i40iw_send_reset(cm_node); + } + + cm_node->state = I40IW_CM_STATE_CLOSED; + i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); +} + +/** + * i40iw_passive_open_err - handle passive side cm error + * @cm_node: connection's node + * @reset: send reset or just free cm_node + */ +static void i40iw_passive_open_err(struct i40iw_cm_node *cm_node, bool reset) +{ + i40iw_cleanup_retrans_entry(cm_node); + cm_node->cm_core->stats_passive_errs++; + cm_node->state = I40IW_CM_STATE_CLOSED; + i40iw_debug(cm_node->dev, + I40IW_DEBUG_CM, + "%s cm_node=%p state =%d\n", + __func__, + cm_node, + cm_node->state); + if (reset) + i40iw_send_reset(cm_node); + else + i40iw_rem_ref_cm_node(cm_node); +} + +/** + * i40iw_event_connect_error - to create connect error event + * @event: cm information for connect event + */ +static void i40iw_event_connect_error(struct i40iw_cm_event *event) +{ + struct i40iw_qp *iwqp; + struct iw_cm_id *cm_id; + + cm_id = event->cm_node->cm_id; + if (!cm_id) + return; + + iwqp = cm_id->provider_data; + + if ((!iwqp) || (!iwqp->iwdev)) + return; + + iwqp->cm_id = NULL; + cm_id->provider_data = NULL; + i40iw_send_cm_event(event->cm_node, cm_id, + IW_CM_EVENT_CONNECT_REPLY, + -ECONNRESET); + cm_id->rem_ref(cm_id); + i40iw_rem_ref_cm_node(event->cm_node); +} + +/** + * i40iw_process_options + * @cm_node: connection's node + * @optionsloc: point to start of options + * @optionsize: size of all options + * @syn_packet: flag if syn packet + */ +static int i40iw_process_options(struct i40iw_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: + i40iw_debug(cm_node->dev, + I40IW_DEBUG_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; + 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: + i40iw_debug(cm_node->dev, + I40IW_DEBUG_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 = I40IW_CM_DEFAULT_MSS; + return 0; +} + +/** + * i40iw_handle_tcp_options - + * @cm_node: connection's node + * @tcph: pointer tcp header + * @optionsize: size of options rcvd + * @passive: active or passive flag + */ +static int i40iw_handle_tcp_options(struct i40iw_cm_node *cm_node, + struct tcphdr *tcph, + int optionsize, + int passive) +{ + u8 *optionsloc = (u8 *)&tcph[1]; + + if (optionsize) { + if (i40iw_process_options(cm_node, + optionsloc, + optionsize, + (u32)tcph->syn)) { + i40iw_debug(cm_node->dev, + I40IW_DEBUG_CM, + "%s: Node %p, Sending RESET\n", + __func__, + cm_node); + if (passive) + i40iw_passive_open_err(cm_node, true); + else + i40iw_active_open_err(cm_node, true); + 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; +} + +/** + * i40iw_build_mpa_v1 - build a MPA V1 frame + * @cm_node: connection's node + * @mpa_key: to do read0 or write0 + */ +static void i40iw_build_mpa_v1(struct i40iw_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; + default: + break; + } + mpa_frame->flags = IETF_MPA_FLAGS_CRC; + mpa_frame->rev = cm_node->mpa_frame_rev; + mpa_frame->priv_data_len = htons(cm_node->pdata.size); +} + +/** + * i40iw_build_mpa_v2 - build a MPA V2 frame + * @cm_node: connection's node + * @start_addr: buffer start address + * @mpa_key: to do read0 or write0 + */ +static void i40iw_build_mpa_v2(struct i40iw_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; + + /* initialize the upper 5 bytes of the frame */ + i40iw_build_mpa_v1(cm_node, start_addr, mpa_key); + mpa_frame->flags |= IETF_MPA_V2_FLAG; + mpa_frame->priv_data_len += htons(IETF_RTR_MSG_SIZE); + + /* initialize RTR msg */ + if (cm_node->mpav2_ird_ord == IETF_NO_IRD_ORD) { + rtr_msg->ctrl_ird = IETF_NO_IRD_ORD; + rtr_msg->ctrl_ord = IETF_NO_IRD_ORD; + } else { + rtr_msg->ctrl_ird = (cm_node->ird_size > IETF_NO_IRD_ORD) ? + IETF_NO_IRD_ORD : cm_node->ird_size; + rtr_msg->ctrl_ord = (cm_node->ord_size > IETF_NO_IRD_ORD) ? + IETF_NO_IRD_ORD : cm_node->ord_size; + } + + rtr_msg->ctrl_ird |= IETF_PEER_TO_PEER; + rtr_msg->ctrl_ird |= IETF_FLPDU_ZERO_LEN; + + switch (mpa_key) { + case MPA_KEY_REQUEST: + rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE; + rtr_msg->ctrl_ord |= IETF_RDMA0_READ; + break; + case MPA_KEY_REPLY: + switch (cm_node->send_rdma0_op) { + case SEND_RDMA_WRITE_ZERO: + rtr_msg->ctrl_ord |= IETF_RDMA0_WRITE; + break; + case SEND_RDMA_READ_ZERO: + rtr_msg->ctrl_ord |= IETF_RDMA0_READ; + break; + } + break; + default: + break; + } + rtr_msg->ctrl_ird = htons(rtr_msg->ctrl_ird); + rtr_msg->ctrl_ord = htons(rtr_msg->ctrl_ord); +} + +/** + * i40iw_cm_build_mpa_frame - build mpa frame for mpa version 1 or version 2 + * @cm_node: connection's node + * @mpa: mpa: data buffer + * @mpa_key: to do read0 or write0 + */ +static int i40iw_cm_build_mpa_frame(struct i40iw_cm_node *cm_node, + struct i40iw_kmem_info *mpa, + u8 mpa_key) +{ + int hdr_len = 0; + + switch (cm_node->mpa_frame_rev) { + case IETF_MPA_V1: + hdr_len = sizeof(struct ietf_mpa_v1); + i40iw_build_mpa_v1(cm_node, mpa->addr, mpa_key); + break; + case IETF_MPA_V2: + hdr_len = sizeof(struct ietf_mpa_v2); + i40iw_build_mpa_v2(cm_node, mpa->addr, mpa_key); + break; + default: + break; + } + + return hdr_len; +} + +/** + * i40iw_send_mpa_request - active node send mpa request to passive node + * @cm_node: connection's node + */ +static int i40iw_send_mpa_request(struct i40iw_cm_node *cm_node) +{ + struct i40iw_puda_buf *sqbuf; + + if (!cm_node) { + i40iw_pr_err("cm_node == NULL\n"); + return -1; + } + + cm_node->mpa_hdr.addr = &cm_node->mpa_frame; + cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, + &cm_node->mpa_hdr, + MPA_KEY_REQUEST); + if (!cm_node->mpa_hdr.size) { + i40iw_pr_err("mpa size = %d\n", cm_node->mpa_hdr.size); + return -1; + } + + sqbuf = i40iw_form_cm_frame(cm_node, + NULL, + &cm_node->mpa_hdr, + &cm_node->pdata, + SET_ACK); + if (!sqbuf) { + i40iw_pr_err("sq_buf == NULL\n"); + return -1; + } + + return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); +} + +/** + * i40iw_send_mpa_reject - + * @cm_node: connection's node + * @pdata: reject data for connection + * @plen: length of reject data + */ +static int i40iw_send_mpa_reject(struct i40iw_cm_node *cm_node, + const void *pdata, + u8 plen) +{ + struct i40iw_puda_buf *sqbuf; + struct i40iw_kmem_info priv_info; + + cm_node->mpa_hdr.addr = &cm_node->mpa_frame; + cm_node->mpa_hdr.size = i40iw_cm_build_mpa_frame(cm_node, + &cm_node->mpa_hdr, + MPA_KEY_REPLY); + + cm_node->mpa_frame.flags |= IETF_MPA_FLAGS_REJECT; + priv_info.addr = (void *)pdata; + priv_info.size = plen; + + sqbuf = i40iw_form_cm_frame(cm_node, + NULL, + &cm_node->mpa_hdr, + &priv_info, + SET_ACK | SET_FIN); + if (!sqbuf) { + i40iw_pr_err("no sqbuf\n"); + return -ENOMEM; + } + cm_node->state = I40IW_CM_STATE_FIN_WAIT1; + return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); +} + +/** + * recv_mpa - process an IETF MPA frame + * @cm_node: connection's node + * @buffer: Data pointer + * @type: to return accept or reject + * @len: Len of mpa buffer + */ +static int i40iw_parse_mpa(struct i40iw_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 = I40IW_MPA_REQUEST_ACCEPT; + + if (len < sizeof(struct ietf_mpa_v1)) { + i40iw_pr_err("ietf buffer small (%x)\n", len); + return -1; + } + + mpa_frame = (struct ietf_mpa_v1 *)buffer; + mpa_hdr_len = sizeof(struct ietf_mpa_v1); + priv_data_len = ntohs(mpa_frame->priv_data_len); + + if (priv_data_len > IETF_MAX_PRIV_DATA_LEN) { + i40iw_pr_err("large pri_data %d\n", priv_data_len); + return -1; + } + if (mpa_frame->rev != IETF_MPA_V1 && mpa_frame->rev != IETF_MPA_V2) { + i40iw_pr_err("unsupported mpa rev = %d\n", mpa_frame->rev); + return -1; + } + if (mpa_frame->rev > cm_node->mpa_frame_rev) { + i40iw_pr_err("rev %d\n", mpa_frame->rev); + return -1; + } + cm_node->mpa_frame_rev = mpa_frame->rev; + + if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) { + if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REQ, IETF_MPA_KEY_SIZE)) { + i40iw_pr_err("Unexpected MPA Key received\n"); + return -1; + } + } else { + if (memcmp(mpa_frame->key, IEFT_MPA_KEY_REP, IETF_MPA_KEY_SIZE)) { + i40iw_pr_err("Unexpected MPA Key received\n"); + return -1; + } + } + + if (priv_data_len + mpa_hdr_len > len) { + i40iw_pr_err("ietf buffer len(%x + %x != %x)\n", + priv_data_len, mpa_hdr_len, len); + return -1; + } + if (len > MAX_CM_BUFFER) { + i40iw_pr_err("ietf buffer large len = %d\n", len); + return -1; + } + + switch (mpa_frame->rev) { + case IETF_MPA_V2:{ + u16 ird_size; + u16 ord_size; + u16 ctrl_ord; + u16 ctrl_ird; + + mpa_v2_frame = (struct ietf_mpa_v2 *)buffer; + mpa_hdr_len += IETF_RTR_MSG_SIZE; + rtr_msg = &mpa_v2_frame->rtr_msg; + + /* parse rtr message */ + ctrl_ord = ntohs(rtr_msg->ctrl_ord); + ctrl_ird = ntohs(rtr_msg->ctrl_ird); + ird_size = ctrl_ird & IETF_NO_IRD_ORD; + ord_size = ctrl_ord & IETF_NO_IRD_ORD; + + if (!(ctrl_ird & IETF_PEER_TO_PEER)) + return -1; + + if (ird_size == IETF_NO_IRD_ORD || ord_size == IETF_NO_IRD_ORD) { + cm_node->mpav2_ird_ord = IETF_NO_IRD_ORD; + goto negotiate_done; + } + + if (cm_node->state != I40IW_CM_STATE_MPAREQ_SENT) { + /* responder */ + if (!ord_size && (ctrl_ord & IETF_RDMA0_READ)) + cm_node->ird_size = 1; + if (cm_node->ord_size > ird_size) + cm_node->ord_size = ird_size; + } else { + /* initiator */ + if (!ird_size && (ctrl_ord & IETF_RDMA0_READ)) + return -1; + if (cm_node->ord_size > ird_size) + cm_node->ord_size = ird_size; + + if (cm_node->ird_size < ord_size) + /* no resources available */ + return -1; + } + +negotiate_done: + if (ctrl_ord & IETF_RDMA0_READ) + cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; + else if (ctrl_ord & IETF_RDMA0_WRITE) + cm_node->send_rdma0_op = SEND_RDMA_WRITE_ZERO; + else /* Not supported RDMA0 operation */ + return -1; + i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, + "MPAV2: Negotiated ORD: %d, IRD: %d\n", + cm_node->ord_size, cm_node->ird_size); + break; + } + break; + case IETF_MPA_V1: + default: + break; + } + + memcpy(cm_node->pdata_buf, buffer + mpa_hdr_len, priv_data_len); + cm_node->pdata.size = priv_data_len; + + if (mpa_frame->flags & IETF_MPA_FLAGS_REJECT) + *type = I40IW_MPA_REQUEST_REJECT; + + if (mpa_frame->flags & IETF_MPA_FLAGS_MARKERS) + cm_node->snd_mark_en = true; + + return 0; +} + +/** + * i40iw_schedule_cm_timer + * @@cm_node: connection's node + * @sqbuf: buffer to send + * @type: if it es send ot close + * @send_retrans: if rexmits to be done + * @close_when_complete: is cm_node to be removed + * + * note - cm_node needs to be protected before calling this. Encase in: + * i40iw_rem_ref_cm_node(cm_core, cm_node); + * i40iw_schedule_cm_timer(...) + * atomic_inc(&cm_node->ref_count); + */ +int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node, + struct i40iw_puda_buf *sqbuf, + enum i40iw_timer_type type, + int send_retrans, + int close_when_complete) +{ + struct i40iw_sc_dev *dev = cm_node->dev; + struct i40iw_cm_core *cm_core = cm_node->cm_core; + struct i40iw_timer_entry *new_send; + int ret = 0; + u32 was_timer_set; + unsigned long flags; + + new_send = kzalloc(sizeof(*new_send), GFP_ATOMIC); + if (!new_send) { + i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf); + return -ENOMEM; + } + new_send->retrycount = I40IW_DEFAULT_RETRYS; + new_send->retranscount = I40IW_DEFAULT_RETRANS; + new_send->sqbuf = sqbuf; + new_send->timetosend = jiffies; + new_send->type = type; + new_send->send_retrans = send_retrans; + new_send->close_when_complete = close_when_complete; + + if (type == I40IW_TIMER_TYPE_CLOSE) { + new_send->timetosend += (HZ / 10); + if (cm_node->close_entry) { + kfree(new_send); + i40iw_free_sqbuf(cm_node->dev, (void *)sqbuf); + i40iw_pr_err("already close entry\n"); + return -EINVAL; + } + cm_node->close_entry = new_send; + } + + if (type == I40IW_TIMER_TYPE_SEND) { + spin_lock_irqsave(&cm_node->retrans_list_lock, flags); + cm_node->send_entry = new_send; + atomic_inc(&cm_node->ref_count); + spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); + new_send->timetosend = jiffies + I40IW_RETRY_TIMEOUT; + + atomic_inc(&sqbuf->refcount); + i40iw_puda_send_buf(dev->ilq, sqbuf); + if (!send_retrans) { + i40iw_cleanup_retrans_entry(cm_node); + if (close_when_complete) + i40iw_rem_ref_cm_node(cm_node); + return ret; + } + } + + spin_lock_irqsave(&cm_core->ht_lock, flags); + was_timer_set = timer_pending(&cm_core->tcp_timer); + + if (!was_timer_set) { + cm_core->tcp_timer.expires = new_send->timetosend; + add_timer(&cm_core->tcp_timer); + } + spin_unlock_irqrestore(&cm_core->ht_lock, flags); + + return ret; +} + +/** + * i40iw_retrans_expired - Could not rexmit the packet + * @cm_node: connection's node + */ +static void i40iw_retrans_expired(struct i40iw_cm_node *cm_node) +{ + struct iw_cm_id *cm_id = cm_node->cm_id; + enum i40iw_cm_node_state state = cm_node->state; + + cm_node->state = I40IW_CM_STATE_CLOSED; + switch (state) { + case I40IW_CM_STATE_SYN_RCVD: + case I40IW_CM_STATE_CLOSING: + i40iw_rem_ref_cm_node(cm_node); + break; + case I40IW_CM_STATE_FIN_WAIT1: + case I40IW_CM_STATE_LAST_ACK: + if (cm_node->cm_id) + cm_id->rem_ref(cm_id); + i40iw_send_reset(cm_node); + break; + default: + atomic_inc(&cm_node->ref_count); + i40iw_send_reset(cm_node); + i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); + break; + } +} + +/** + * i40iw_handle_close_entry - for handling retry/timeouts + * @cm_node: connection's node + * @rem_node: flag for remove cm_node + */ +static void i40iw_handle_close_entry(struct i40iw_cm_node *cm_node, u32 rem_node) +{ + struct i40iw_timer_entry *close_entry = cm_node->close_entry; + struct iw_cm_id *cm_id = cm_node->cm_id; + struct i40iw_qp *iwqp; + unsigned long flags; + + if (!close_entry) + return; + iwqp = (struct i40iw_qp *)close_entry->sqbuf; + if (iwqp) { + spin_lock_irqsave(&iwqp->lock, flags); + if (iwqp->cm_id) { + iwqp->hw_tcp_state = I40IW_TCP_STATE_CLOSED; + iwqp->hw_iwarp_state = I40IW_QP_STATE_ERROR; + iwqp->last_aeq = I40IW_AE_RESET_SENT; + iwqp->ibqp_state = IB_QPS_ERR; + spin_unlock_irqrestore(&iwqp->lock, flags); + i40iw_cm_disconn(iwqp); + } else { + spin_unlock_irqrestore(&iwqp->lock, flags); + } + } else if (rem_node) { + /* TIME_WAIT state */ + i40iw_rem_ref_cm_node(cm_node); + } + if (cm_id) + cm_id->rem_ref(cm_id); + kfree(close_entry); + cm_node->close_entry = NULL; +} + +/** + * i40iw_cm_timer_tick - system's timer expired callback + * @pass: Pointing to cm_core + */ +static void i40iw_cm_timer_tick(unsigned long pass) +{ + unsigned long nexttimeout = jiffies + I40IW_LONG_TIME; + struct i40iw_cm_node *cm_node; + struct i40iw_timer_entry *send_entry, *close_entry; + struct list_head *list_core_temp; + struct list_head *list_node; + struct i40iw_cm_core *cm_core = (struct i40iw_cm_core *)pass; + u32 settimer = 0; + unsigned long timetosend; + struct i40iw_sc_dev *dev; + unsigned long flags; + + 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 i40iw_cm_node, list); + if ((cm_node->close_entry) || (cm_node->send_entry)) { + atomic_inc(&cm_node->ref_count); + 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 i40iw_cm_node, + timer_entry); + close_entry = cm_node->close_entry; + + if (close_entry) { + if (time_after(close_entry->timetosend, jiffies)) { + if (nexttimeout > close_entry->timetosend || + !settimer) { + nexttimeout = close_entry->timetosend; + settimer = 1; + } + } else { + i40iw_handle_close_entry(cm_node, 1); + } + } + + spin_lock_irqsave(&cm_node->retrans_list_lock, flags); + + send_entry = cm_node->send_entry; + if (!send_entry) + goto done; + if (time_after(send_entry->timetosend, jiffies)) { + if (cm_node->state != I40IW_CM_STATE_OFFLOADED) { + if ((nexttimeout > send_entry->timetosend) || + !settimer) { + nexttimeout = send_entry->timetosend; + settimer = 1; + } + } else { + i40iw_free_retrans_entry(cm_node); + } + goto done; + } + + if ((cm_node->state == I40IW_CM_STATE_OFFLOADED) || + (cm_node->state == I40IW_CM_STATE_CLOSED)) { + i40iw_free_retrans_entry(cm_node); + goto done; + } + + if (!send_entry->retranscount || !send_entry->retrycount) { + i40iw_free_retrans_entry(cm_node); + + spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); + i40iw_retrans_expired(cm_node); + cm_node->state = I40IW_CM_STATE_CLOSED; + spin_lock_irqsave(&cm_node->retrans_list_lock, flags); + goto done; + } + cm_node->cm_core->stats_pkt_retrans++; + spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); + + dev = cm_node->dev; + atomic_inc(&send_entry->sqbuf->refcount); + i40iw_puda_send_buf(dev->ilq, send_entry->sqbuf); + spin_lock_irqsave(&cm_node->retrans_list_lock, flags); + if (send_entry->send_retrans) { + send_entry->retranscount--; + timetosend = (I40IW_RETRY_TIMEOUT << + (I40IW_DEFAULT_RETRANS - + send_entry->retranscount)); + + send_entry->timetosend = jiffies + + min(timetosend, I40IW_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; + i40iw_debug(cm_node->dev, + I40IW_DEBUG_CM, + "cm_node=%p state=%d\n", + cm_node, + cm_node->state); + i40iw_free_retrans_entry(cm_node); + if (close_when_complete) + i40iw_rem_ref_cm_node(cm_node); + } +done: + spin_unlock_irqrestore(&cm_node->retrans_list_lock, flags); + i40iw_rem_ref_cm_node(cm_node); + } + + if (settimer) { + spin_lock_irqsave(&cm_core->ht_lock, flags); + if (!timer_pending(&cm_core->tcp_timer)) { + cm_core->tcp_timer.expires = nexttimeout; + add_timer(&cm_core->tcp_timer); + } + spin_unlock_irqrestore(&cm_core->ht_lock, flags); + } +} + +/** + * i40iw_send_syn - send SYN packet + * @cm_node: connection's node + * @sendack: flag to set ACK bit or not + */ +int i40iw_send_syn(struct i40iw_cm_node *cm_node, u32 sendack) +{ + struct i40iw_puda_buf *sqbuf; + int flags = SET_SYN; + char optionsbuffer[sizeof(struct option_mss) + + sizeof(struct option_windowscale) + + sizeof(struct option_base) + TCP_OPTIONS_PADDING]; + struct i40iw_kmem_info opts; + + int optionssize = 0; + /* Sending MSS option */ + union all_known_options *options; + + opts.addr = optionsbuffer; + if (!cm_node) { + i40iw_pr_err("no cm_node\n"); + 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); + options = (union all_known_options *)&optionsbuffer[optionssize]; + options->as_end = OPTION_NUMBER_END; + optionssize += 1; + + if (sendack) + flags |= SET_ACK; + + opts.size = optionssize; + + sqbuf = i40iw_form_cm_frame(cm_node, &opts, NULL, NULL, flags); + if (!sqbuf) { + i40iw_pr_err("no sqbuf\n"); + return -1; + } + return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); +} + +/** + * i40iw_send_ack - Send ACK packet + * @cm_node: connection's node + */ +static void i40iw_send_ack(struct i40iw_cm_node *cm_node) +{ + struct i40iw_puda_buf *sqbuf; + + sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK); + if (sqbuf) + i40iw_puda_send_buf(cm_node->dev->ilq, sqbuf); + else + i40iw_pr_err("no sqbuf\n"); +} + +/** + * i40iw_send_fin - Send FIN pkt + * @cm_node: connection's node + */ +static int i40iw_send_fin(struct i40iw_cm_node *cm_node) +{ + struct i40iw_puda_buf *sqbuf; + + sqbuf = i40iw_form_cm_frame(cm_node, NULL, NULL, NULL, SET_ACK | SET_FIN); + if (!sqbuf) { + i40iw_pr_err("no sqbuf\n"); + return -1; + } + return i40iw_schedule_cm_timer(cm_node, sqbuf, I40IW_TIMER_TYPE_SEND, 1, 0); +} + +/** + * i40iw_find_node - find a cm node that matches the reference cm node + * @cm_core: cm's core + * @rem_port: remote tcp port num + * @rem_addr: remote ip addr + * @loc_port: local tcp port num + * @loc_addr: loc ip addr + * @add_refcnt: flag to increment refcount of cm_node + */ +struct i40iw_cm_node *i40iw_find_node(struct i40iw_cm_core *cm_core, + u16 rem_port, + u32 *rem_addr, + u16 loc_port, + u32 *loc_addr, + bool add_refcnt) +{ + struct list_head *hte; + struct i40iw_cm_node *cm_node; + unsigned long flags; + + 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) { + if (!memcmp(cm_node->map_loc_addr, loc_addr, sizeof(cm_node->map_loc_addr)) && + (cm_node->map_loc_port == loc_port) && + !memcmp(cm_node->map_rem_addr, rem_addr, sizeof(cm_node->map_rem_addr)) && + (cm_node->map_rem_port == rem_port)) { + if (add_refcnt) + atomic_inc(&cm_node->ref_count); + spin_unlock_irqrestore(&cm_core->ht_lock, flags); + return cm_node; + } + } + spin_unlock_irqrestore(&cm_core->ht_lock, flags); + + /* no owner node */ + return NULL; +} + +/** + * i40iw_find_listener - find a cm node listening on this addr-port pair + * @cm_core: cm's core + * @dst_port: listener tcp port num + * @dst_addr: listener ip addr + * @listener_state: state to match with listen node's + */ +static struct i40iw_cm_listener *i40iw_find_listener( + struct i40iw_cm_core *cm_core, + u32 *dst_addr, + u16 dst_port, + u16 vlan_id, + enum i40iw_cm_listener_state + listener_state, + bool mapped) +{ + struct i40iw_cm_listener *listen_node; + static const u32 ip_zero[4] = { 0, 0, 0, 0 }; + u32 listen_addr[4]; + u16 listen_port; + unsigned long flags; + + /* 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_nodes, list) { + if (mapped) { + memcpy(listen_addr, listen_node->map_loc_addr, sizeof(listen_addr)); + listen_port = listen_node->map_loc_port; + } else { + memcpy(listen_addr, listen_node->loc_addr, sizeof(listen_addr)); + listen_port = listen_node->loc_port; + } + /* compare node pair, return node handle if a match */ + if ((!memcmp(listen_addr, dst_addr, sizeof(listen_addr)) || + !memcmp(listen_addr, ip_zero, sizeof(listen_addr))) && + (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); + return NULL; +} + +/** + * i40iw_add_hte_node - add a cm node to the hash table + * @cm_core: cm's core + * @cm_node: connection's node + */ +static void i40iw_add_hte_node(struct i40iw_cm_core *cm_core, + struct i40iw_cm_node *cm_node) +{ + struct list_head *hte; + unsigned long flags; + + if (!cm_node || !cm_core) { + i40iw_pr_err("cm_node or cm_core == NULL\n"); + return; + } + 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); + spin_unlock_irqrestore(&cm_core->ht_lock, flags); +} + +/** + * listen_port_in_use - determine if port is in use + * @port: Listen port number + */ +static bool i40iw_listen_port_in_use(struct i40iw_cm_core *cm_core, u16 port) +{ + struct i40iw_cm_listener *listen_node; + unsigned long flags; + bool ret = false; + + spin_lock_irqsave(&cm_core->listen_list_lock, flags); + list_for_each_entry(listen_node, &cm_core->listen_nodes, list) { + if (listen_node->map_loc_port == port) { + ret = true; + break; + } + } + spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); + return ret; +} + +/** + * i40iw_del_multiple_qhash - Remove qhash and child listens + * @iwdev: iWarp device + * @cm_info: CM info for parent listen node + * @cm_parent_listen_node: The parent listen node + */ +static enum i40iw_status_code i40iw_del_multiple_qhash( + struct i40iw_device *iwdev, + struct i40iw_cm_info *cm_info, + struct i40iw_cm_listener *cm_parent_listen_node) +{ + struct i40iw_cm_listener *child_listen_node; + enum i40iw_status_code ret = I40IW_ERR_CONFIG; + struct list_head *pos, *tpos; + unsigned long flags; + + spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); + list_for_each_safe(pos, tpos, &cm_parent_listen_node->child_listen_list) { + child_listen_node = list_entry(pos, struct i40iw_cm_listener, child_listen_list); + if (child_listen_node->ipv4) + i40iw_debug(&iwdev->sc_dev, + I40IW_DEBUG_CM, + "removing child listen for IP=%pI4, port=%d, vlan=%d\n", + child_listen_node->loc_addr, + child_listen_node->loc_port, + child_listen_node->vlan_id); + else + i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, + "removing child listen for IP=%pI6, port=%d, vlan=%d\n", + child_listen_node->loc_addr, + child_listen_node->loc_port, + child_listen_node->vlan_id); + list_del(pos); + memcpy(cm_info->map_loc_addr, child_listen_node->map_loc_addr, + sizeof(cm_info->map_loc_addr)); + memcpy(cm_info->loc_addr, child_listen_node->loc_addr, + sizeof(cm_info->loc_addr)); + cm_info->vlan_id = child_listen_node->vlan_id; + ret = i40iw_manage_qhash(iwdev, cm_info, + I40IW_QHASH_TYPE_TCP_SYN, + I40IW_QHASH_MANAGE_TYPE_DELETE, NULL, false); + kfree(child_listen_node); + cm_parent_listen_node->cm_core->stats_listen_nodes_destroyed++; + i40iw_debug(&iwdev->sc_dev, + I40IW_DEBUG_CM, + "freed pointer = %p\n", + child_listen_node); + } + spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); + + return ret; +} + +/** + * i40iw_netdev_vlan_ipv6 - Gets the netdev and mac + * @addr: local IPv6 address + * @vlan_id: vlan id for the given IPv6 address + * @mac: mac address for the given IPv6 address + * + * Returns the net_device of the IPv6 address and also sets the + * vlan id and mac for that address. + */ +static struct net_device *i40iw_netdev_vlan_ipv6(u32 *addr, u16 *vlan_id, u8 *mac) +{ + struct net_device *ip_dev = NULL; +#if IS_ENABLED(CONFIG_IPV6) + struct in6_addr laddr6; + + i40iw_copy_ip_htonl(laddr6.in6_u.u6_addr32, addr); + if (vlan_id) + *vlan_id = I40IW_NO_VLAN; + if (mac) + eth_zero_addr(mac); + rcu_read_lock(); + for_each_netdev_rcu(&init_net, ip_dev) { + if (ipv6_chk_addr(&init_net, &laddr6, ip_dev, 1)) { + if (vlan_id) + *vlan_id = rdma_vlan_dev_vlan_id(ip_dev); + if (ip_dev->dev_addr && mac) + ether_addr_copy(mac, ip_dev->dev_addr); + break; + } + } + rcu_read_unlock(); +#endif + return ip_dev; +} + +/** + * i40iw_get_vlan_ipv4 - Returns the vlan_id for IPv4 address + * @addr: local IPv4 address + */ +static u16 i40iw_get_vlan_ipv4(u32 *addr) +{ + struct net_device *netdev; + u16 vlan_id = I40IW_NO_VLAN; + + netdev = ip_dev_find(&init_net, htonl(addr[0])); + if (netdev) { + vlan_id = rdma_vlan_dev_vlan_id(netdev); + dev_put(netdev); + } + return vlan_id; +} + +/** + * i40iw_add_mqh_6 - Adds multiple qhashes for IPv6 + * @iwdev: iWarp device + * @cm_info: CM info for parent listen node + * @cm_parent_listen_node: The parent listen node + * + * Adds a qhash and a child listen node for every IPv6 address + * on the adapter and adds the associated qhash filter + */ +static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev, + struct i40iw_cm_info *cm_info, + struct i40iw_cm_listener *cm_parent_listen_node) +{ + struct net_device *ip_dev = NULL; + struct inet6_dev *idev; + struct inet6_ifaddr *ifp; + enum i40iw_status_code ret = 0; + struct i40iw_cm_listener *child_listen_node; + unsigned long flags; + + rtnl_lock(); + for_each_netdev_rcu(&init_net, ip_dev) { + if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) && + (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) || + (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) { + idev = __in6_dev_get(ip_dev); + if (!idev) { + i40iw_pr_err("idev == NULL\n"); + break; + } + list_for_each_entry(ifp, &idev->addr_list, if_list) { + i40iw_debug(&iwdev->sc_dev, + I40IW_DEBUG_CM, + "IP=%pI6, vlan_id=%d, MAC=%pM\n", + &ifp->addr, + rdma_vlan_dev_vlan_id(ip_dev), + ip_dev->dev_addr); + child_listen_node = + kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); + i40iw_debug(&iwdev->sc_dev, + I40IW_DEBUG_CM, + "Allocating child listener %p\n", + child_listen_node); + if (!child_listen_node) { + i40iw_pr_err("listener memory allocation\n"); + ret = I40IW_ERR_NO_MEMORY; + goto exit; + } + cm_info->vlan_id = rdma_vlan_dev_vlan_id(ip_dev); + cm_parent_listen_node->vlan_id = cm_info->vlan_id; + + memcpy(child_listen_node, cm_parent_listen_node, + sizeof(*child_listen_node)); + + i40iw_copy_ip_ntohl(child_listen_node->loc_addr, + ifp->addr.in6_u.u6_addr32); + i40iw_copy_ip_ntohl(child_listen_node->map_loc_addr, + ifp->addr.in6_u.u6_addr32); + + memcpy(cm_info->map_loc_addr, child_listen_node->map_loc_addr, + sizeof(cm_info->map_loc_addr)); + memcpy(cm_info->loc_addr, child_listen_node->loc_addr, + sizeof(cm_info->loc_addr)); + + ret = i40iw_manage_qhash(iwdev, cm_info, + I40IW_QHASH_TYPE_TCP_SYN, + I40IW_QHASH_MANAGE_TYPE_ADD, + NULL, true); + if (!ret) { + spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); + list_add(&child_listen_node->child_listen_list, + &cm_parent_listen_node->child_listen_list); + spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); + cm_parent_listen_node->cm_core->stats_listen_nodes_created++; + } else { + kfree(child_listen_node); + } + } + } + } +exit: + rtnl_unlock(); + return ret; +} + +/** + * i40iw_add_mqh_4 - Adds multiple qhashes for IPv4 + * @iwdev: iWarp device + * @cm_info: CM info for parent listen node + * @cm_parent_listen_node: The parent listen node + * + * Adds a qhash and a child listen node for every IPv4 address + * on the adapter and adds the associated qhash filter + */ +static enum i40iw_status_code i40iw_add_mqh_4( + struct i40iw_device *iwdev, + struct i40iw_cm_info *cm_info, + struct i40iw_cm_listener *cm_parent_listen_node) +{ + struct net_device *dev; + struct in_device *idev; + struct i40iw_cm_listener *child_listen_node; + enum i40iw_status_code ret = 0; + unsigned long flags; + + rtnl_lock(); + for_each_netdev(&init_net, dev) { + if ((((rdma_vlan_dev_vlan_id(dev) < I40IW_NO_VLAN) && + (rdma_vlan_dev_real_dev(dev) == iwdev->netdev)) || + (dev == iwdev->netdev)) && (dev->flags & IFF_UP)) { + idev = in_dev_get(dev); + for_ifa(idev) { + i40iw_debug(&iwdev->sc_dev, + I40IW_DEBUG_CM, + "Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", + &ifa->ifa_address, + rdma_vlan_dev_vlan_id(dev), + dev->dev_addr); + child_listen_node = kzalloc(sizeof(*child_listen_node), GFP_ATOMIC); + cm_parent_listen_node->cm_core->stats_listen_nodes_created++; + i40iw_debug(&iwdev->sc_dev, + I40IW_DEBUG_CM, + "Allocating child listener %p\n", + child_listen_node); + if (!child_listen_node) { + i40iw_pr_err("listener memory allocation\n"); + in_dev_put(idev); + ret = I40IW_ERR_NO_MEMORY; + goto exit; + } + cm_info->vlan_id = rdma_vlan_dev_vlan_id(dev); + cm_parent_listen_node->vlan_id = cm_info->vlan_id; + memcpy(child_listen_node, + cm_parent_listen_node, + sizeof(*child_listen_node)); + + child_listen_node->loc_addr[0] = ntohl(ifa->ifa_address); + child_listen_node->map_loc_addr[0] = ntohl(ifa->ifa_address); + + memcpy(cm_info->map_loc_addr, child_listen_node->map_loc_addr, + sizeof(cm_info->map_loc_addr)); + memcpy(cm_info->loc_addr, child_listen_node->loc_addr, + sizeof(cm_info->loc_addr)); + + ret = i40iw_manage_qhash(iwdev, + cm_info, + I40IW_QHASH_TYPE_TCP_SYN, + I40IW_QHASH_MANAGE_TYPE_ADD, + NULL, + true); + if (!ret) { + spin_lock_irqsave(&iwdev->cm_core.listen_list_lock, flags); + list_add(&child_listen_node->child_listen_list, + &cm_parent_listen_node->child_listen_list); + spin_unlock_irqrestore(&iwdev->cm_core.listen_list_lock, flags); + } else { + kfree(child_listen_node); + cm_parent_listen_node->cm_core->stats_listen_nodes_created--; + } + } + endfor_ifa(idev); + in_dev_put(idev); + } + } +exit: + rtnl_unlock(); + return ret; +} + +/** + * i40iw_dec_refcnt_listen - delete listener and associated cm nodes + * @cm_core: cm's core + * @free_hanging_nodes: to free associated cm_nodes + * @apbvt_del: flag to delete the apbvt + */ +static int i40iw_dec_refcnt_listen(struct i40iw_cm_core *cm_core, + struct i40iw_cm_listener *listener, + int free_hanging_nodes, bool apbvt_del) +{ + int ret = -EINVAL; + int err = 0; + struct list_head *list_pos = NULL; + struct list_head *list_temp = NULL; + struct i40iw_cm_node *cm_node = NULL; + struct list_head reset_list; + struct i40iw_cm_info nfo; + struct i40iw_cm_node *loopback; + enum i40iw_cm_node_state old_state; + unsigned long flags; + + /* 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, &cm_core->connected_nodes) { + cm_node = container_of(list_pos, struct i40iw_cm_node, list); + if ((cm_node->listener == listener) && (!cm_node->accelerated)) { + atomic_inc(&cm_node->ref_count); + 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 i40iw_cm_node, reset_entry); + loopback = cm_node->loopbackpartner; + if (cm_node->state >= I40IW_CM_STATE_FIN_WAIT1) { + i40iw_rem_ref_cm_node(cm_node); + } else { + if (!loopback) { + i40iw_cleanup_retrans_entry(cm_node); + err = i40iw_send_reset(cm_node); + if (err) { + cm_node->state = I40IW_CM_STATE_CLOSED; + i40iw_pr_err("send reset\n"); + } else { + old_state = cm_node->state; + cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; + if (old_state != I40IW_CM_STATE_MPAREQ_RCVD) + i40iw_rem_ref_cm_node(cm_node); + } + } else { + struct i40iw_cm_event event; + + event.cm_node = loopback; + memcpy(event.cm_info.rem_addr, + loopback->rem_addr, sizeof(event.cm_info.rem_addr)); + memcpy(event.cm_info.loc_addr, + loopback->loc_addr, sizeof(event.cm_info.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; + event.cm_info.ipv4 = loopback->ipv4; + atomic_inc(&loopback->ref_count); + loopback->state = I40IW_CM_STATE_CLOSED; + i40iw_event_connect_error(&event); + cm_node->state = I40IW_CM_STATE_LISTENER_DESTROYED; + i40iw_rem_ref_cm_node(cm_node); + } + } + } + + if (!atomic_dec_return(&listener->ref_count)) { + spin_lock_irqsave(&cm_core->listen_list_lock, flags); + list_del(&listener->list); + spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); + + if (listener->iwdev) { + if (apbvt_del && !i40iw_listen_port_in_use(cm_core, listener->map_loc_port)) + i40iw_manage_apbvt(listener->iwdev, + listener->map_loc_port, + I40IW_MANAGE_APBVT_DEL); + + memcpy(nfo.loc_addr, listener->loc_addr, sizeof(nfo.loc_addr)); + memcpy(nfo.map_loc_addr, listener->map_loc_addr, sizeof(nfo.map_loc_addr)); + nfo.loc_port = listener->loc_port; + nfo.map_loc_port = listener->map_loc_port; + nfo.ipv4 = listener->ipv4; + nfo.vlan_id = listener->vlan_id; + + i40iw_remove_mapinfo(&nfo); + + if (!list_empty(&listener->child_listen_list)) { + i40iw_del_multiple_qhash(listener->iwdev, &nfo, listener); + } else { + if (listener->qhash_set) + i40iw_manage_qhash(listener->iwdev, + &nfo, + I40IW_QHASH_TYPE_TCP_SYN, + I40IW_QHASH_MANAGE_TYPE_DELETE, + NULL, + false); + } + } + + cm_core->stats_listen_destroyed++; + kfree(listener); + cm_core->stats_listen_nodes_destroyed++; + listener = NULL; + ret = 0; + } + + if (listener) { + if (atomic_read(&listener->pend_accepts_cnt) > 0) + i40iw_debug(cm_core->dev, + I40IW_DEBUG_CM, + "%s: listener (%p) pending accepts=%u\n", + __func__, + listener, + atomic_read(&listener->pend_accepts_cnt)); + } + + return ret; +} + +/** + * i40iw_cm_del_listen - delete a linstener + * @cm_core: cm's core + * @listener: passive connection's listener + * @apbvt_del: flag to delete apbvt + */ +static int i40iw_cm_del_listen(struct i40iw_cm_core *cm_core, + struct i40iw_cm_listener *listener, + bool apbvt_del) +{ + listener->listener_state = I40IW_CM_LISTENER_PASSIVE_STATE; + listener->cm_id = NULL; /* going to be destroyed pretty soon */ + return i40iw_dec_refcnt_listen(cm_core, listener, 1, apbvt_del); +} + +/** + * i40iw_addr_resolve_neigh - resolve neighbor address + * @iwdev: iwarp device structure + * @src_ip: local ip address + * @dst_ip: remote ip address + * @arpindex: if there is an arp entry + */ +static int i40iw_addr_resolve_neigh(struct i40iw_device *iwdev, + u32 src_ip, + u32 dst_ip, + int arpindex) +{ + struct rtable *rt; + struct neighbour *neigh; + int rc = arpindex; + struct net_device *netdev = iwdev->netdev; + __be32 dst_ipaddr = htonl(dst_ip); + __be32 src_ipaddr = htonl(src_ip); + + rt = ip_route_output(&init_net, dst_ipaddr, src_ipaddr, 0, 0); + if (IS_ERR(rt)) { + i40iw_pr_err("ip_route_output\n"); + return rc; + } + + if (netif_is_bond_slave(netdev)) + netdev = netdev_master_upper_dev_get(netdev); + + neigh = dst_neigh_lookup(&rt->dst, &dst_ipaddr); + + rcu_read_lock(); + if (neigh) { + if (neigh->nud_state & NUD_VALID) { + if (arpindex >= 0) { + if (ether_addr_equal(iwdev->arp_table[arpindex].mac_addr, + neigh->ha)) + /* Mac address same as arp table */ + goto resolve_neigh_exit; + i40iw_manage_arp_cache(iwdev, + iwdev->arp_table[arpindex].mac_addr, + &dst_ip, + true, + I40IW_ARP_DELETE); + } + + i40iw_manage_arp_cache(iwdev, neigh->ha, &dst_ip, true, I40IW_ARP_ADD); + rc = i40iw_arp_table(iwdev, &dst_ip, true, NULL, I40IW_ARP_RESOLVE); + } else { + neigh_event_send(neigh, NULL); + } + } + resolve_neigh_exit: + + rcu_read_unlock(); + if (neigh) + neigh_release(neigh); + + ip_rt_put(rt); + return rc; +} + +/** + * i40iw_get_dst_ipv6 + */ +#if IS_ENABLED(CONFIG_IPV6) +static struct dst_entry *i40iw_get_dst_ipv6(struct sockaddr_in6 *src_addr, + struct sockaddr_in6 *dst_addr) +{ + struct dst_entry *dst; + struct flowi6 fl6; + + memset(&fl6, 0, sizeof(fl6)); + fl6.daddr = dst_addr->sin6_addr; + fl6.saddr = src_addr->sin6_addr; + if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL) + fl6.flowi6_oif = dst_addr->sin6_scope_id; + + dst = ip6_route_output(&init_net, NULL, &fl6); + return dst; +} +#endif + +/** + * i40iw_addr_resolve_neigh_ipv6 - resolve neighbor ipv6 address + * @iwdev: iwarp device structure + * @dst_ip: remote ip address + * @arpindex: if there is an arp entry + */ +#if IS_ENABLED(CONFIG_IPV6) +static int i40iw_addr_resolve_neigh_ipv6(struct i40iw_device *iwdev, + u32 *src, + u32 *dest, + int arpindex) +{ + struct neighbour *neigh; + int rc = arpindex; + struct net_device *netdev = iwdev->netdev; + struct dst_entry *dst; + struct sockaddr_in6 dst_addr; + struct sockaddr_in6 src_addr; + + memset(&dst_addr, 0, sizeof(dst_addr)); + dst_addr.sin6_family = AF_INET6; + i40iw_copy_ip_htonl(dst_addr.sin6_addr.in6_u.u6_addr32, dest); + memset(&src_addr, 0, sizeof(src_addr)); + src_addr.sin6_family = AF_INET6; + i40iw_copy_ip_htonl(src_addr.sin6_addr.in6_u.u6_addr32, src); + dst = i40iw_get_dst_ipv6(&src_addr, &dst_addr); + if ((!dst) || dst->error) { + if (dst) { + dst_release(dst); + i40iw_pr_err("ip6_route_output returned dst->error = %d\n", + dst->error); + } + return rc; + } + + if (netif_is_bond_slave(netdev)) + netdev = netdev_master_upper_dev_get(netdev); + + neigh = dst_neigh_lookup(dst, &dst_addr); + + rcu_read_lock(); + if (neigh) { + i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "dst_neigh_lookup MAC=%pM\n", neigh->ha); + if (neigh->nud_state & NUD_VALID) { + if (arpindex >= 0) { + if (ether_addr_equal + (iwdev->arp_table[arpindex].mac_addr, + neigh->ha)) { + /* Mac address same as in arp table */ + goto resolve_neigh_exit6; + } + i40iw_manage_arp_cache(iwdev, + iwdev->arp_table[arpindex].mac_addr, + dest, + false, + I40IW_ARP_DELETE); + } + i40iw_manage_arp_cache(iwdev, + neigh->ha, + dest, + false, + I40IW_ARP_ADD); + rc = i40iw_arp_table(iwdev, + dest, + false, + NULL, + I40IW_ARP_RESOLVE); + } else { + neigh_event_send(neigh, NULL); + } + } + + resolve_neigh_exit6: + rcu_read_unlock(); + if (neigh) + neigh_release(neigh); + dst_release(dst); + return rc; +} +#endif + +/** + * i40iw_ipv4_is_loopback - check if loopback + * @loc_addr: local addr to compare + * @rem_addr: remote address + */ +static bool i40iw_ipv4_is_loopback(u32 loc_addr, u32 rem_addr) +{ + return ipv4_is_loopback(htonl(rem_addr)) || (loc_addr == rem_addr); +} + +/** + * i40iw_ipv6_is_loopback - check if loopback + * @loc_addr: local addr to compare + * @rem_addr: remote address + */ +static bool i40iw_ipv6_is_loopback(u32 *loc_addr, u32 *rem_addr) +{ + struct in6_addr raddr6; + + i40iw_copy_ip_htonl(raddr6.in6_u.u6_addr32, rem_addr); + return (!memcmp(loc_addr, rem_addr, 16) || ipv6_addr_loopback(&raddr6)); +} + +/** + * i40iw_make_cm_node - create a new instance of a cm node + * @cm_core: cm's core + * @iwdev: iwarp device structure + * @cm_info: quad info for connection + * @listener: passive connection's listener + */ +static struct i40iw_cm_node *i40iw_make_cm_node( + struct i40iw_cm_core *cm_core, + struct i40iw_device *iwdev, + struct i40iw_cm_info *cm_info, + struct i40iw_cm_listener *listener) +{ + struct i40iw_cm_node *cm_node; + struct timespec ts; + int oldarpindex = 0; + int arpindex = 0; + struct net_device *netdev = iwdev->netdev; + + /* create an hte and cm_node for this instance */ + cm_node = kzalloc(sizeof(*cm_node), GFP_ATOMIC); + if (!cm_node) + return NULL; + + /* set our node specific transport info */ + cm_node->ipv4 = cm_info->ipv4; + cm_node->vlan_id = cm_info->vlan_id; + memcpy(cm_node->loc_addr, cm_info->loc_addr, sizeof(cm_node->loc_addr)); + memcpy(cm_node->rem_addr, cm_info->rem_addr, sizeof(cm_node->rem_addr)); + memcpy(cm_node->map_loc_addr, cm_info->map_loc_addr, + sizeof(cm_node->map_loc_addr)); + memcpy(cm_node->map_rem_addr, cm_info->map_rem_addr, + sizeof(cm_node->map_rem_addr)); + cm_node->loc_port = cm_info->loc_port; + cm_node->rem_port = cm_info->rem_port; + cm_node->map_loc_port = cm_info->map_loc_port; + cm_node->map_rem_port = cm_info->map_rem_port; + + cm_node->mpa_frame_rev = iwdev->mpa_version; + cm_node->send_rdma0_op = SEND_RDMA_READ_ZERO; + cm_node->mpav2_ird_ord = 0; + cm_node->ird_size = I40IW_MAX_IRD_SIZE; + cm_node->ord_size = I40IW_MAX_ORD_SIZE; + + cm_node->listener = listener; + cm_node->cm_id = cm_info->cm_id; + ether_addr_copy(cm_node->loc_mac, netdev->dev_addr); + spin_lock_init(&cm_node->retrans_list_lock); + + atomic_set(&cm_node->ref_count, 1); + /* associate our parent CM core */ + cm_node->cm_core = cm_core; + cm_node->tcp_cntxt.loc_id = I40IW_CM_DEF_LOCAL_ID; + cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; + cm_node->tcp_cntxt.rcv_wnd = + I40IW_CM_DEFAULT_RCV_WND_SCALED >> I40IW_CM_DEFAULT_RCV_WND_SCALE; + ts = current_kernel_time(); + cm_node->tcp_cntxt.loc_seq_num = htonl(ts.tv_nsec); + cm_node->tcp_cntxt.mss = iwdev->mss; + cm_node->tcp_cntxt.rcv_nxt = 0; + cm_node->apbvt_set = 0; + cm_node->accept_pend = 0; + + cm_node->iwdev = iwdev; + cm_node->dev = &iwdev->sc_dev; + cm_node->loopbackpartner = NULL; + + if ((cm_node->ipv4 && + i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || + (!cm_node->ipv4 && i40iw_ipv6_is_loopback(cm_node->loc_addr, + cm_node->rem_addr))) { + arpindex = i40iw_arp_table(iwdev, + cm_node->map_rem_addr, + false, + NULL, + I40IW_ARP_RESOLVE); + } else { + oldarpindex = i40iw_arp_table(iwdev, + cm_node->map_rem_addr, + false, + NULL, + I40IW_ARP_RESOLVE); + if (cm_node->ipv4) + arpindex = i40iw_addr_resolve_neigh(iwdev, + cm_info->map_loc_addr[0], + cm_info->map_rem_addr[0], + oldarpindex); +#if IS_ENABLED(CONFIG_IPV6) + else + arpindex = i40iw_addr_resolve_neigh_ipv6(iwdev, + cm_info->map_loc_addr, + cm_info->map_rem_addr, + oldarpindex); +#endif + } + if (arpindex < 0) { + i40iw_pr_err("cm_node arpindex\n"); + kfree(cm_node); + return NULL; + } + ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr); + i40iw_add_hte_node(cm_core, cm_node); + cm_core->stats_nodes_created++; + return cm_node; +} + +/** + * i40iw_rem_ref_cm_node - destroy an instance of a cm node + * @cm_node: connection's node + */ +static void i40iw_rem_ref_cm_node(struct i40iw_cm_node *cm_node) +{ + struct i40iw_cm_core *cm_core = cm_node->cm_core; + struct i40iw_qp *iwqp; + struct i40iw_cm_info nfo; + unsigned long flags; + + 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; + } + list_del(&cm_node->list); + 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) { + pr_err("node destroyed before established\n"); + atomic_dec(&cm_node->listener->pend_accepts_cnt); + } + if (cm_node->close_entry) + i40iw_handle_close_entry(cm_node, 0); + if (cm_node->listener) { + i40iw_dec_refcnt_listen(cm_core, cm_node->listener, 0, true); + } else { + if (!i40iw_listen_port_in_use(cm_core, htons(cm_node->map_loc_port)) && + cm_node->apbvt_set && cm_node->iwdev) { + i40iw_manage_apbvt(cm_node->iwdev, + cm_node->map_loc_port, + I40IW_MANAGE_APBVT_DEL); + i40iw_get_addr_info(cm_node, &nfo); + i40iw_remove_mapinfo(&nfo); + if (cm_node->qhash_set) { + i40iw_manage_qhash(cm_node->iwdev, + &nfo, + I40IW_QHASH_TYPE_TCP_ESTABLISHED, + I40IW_QHASH_MANAGE_TYPE_DELETE, + NULL, + false); + cm_node->qhash_set = 0; + } + } + } + + iwqp = cm_node->iwqp; + if (iwqp) { + iwqp->cm_node = NULL; + i40iw_rem_ref(&iwqp->ibqp); + cm_node->iwqp = NULL; + } else if (cm_node->qhash_set) { + i40iw_get_addr_info(cm_node, &nfo); + i40iw_remove_mapinfo(&nfo); + i40iw_manage_qhash(cm_node->iwdev, + &nfo, + I40IW_QHASH_TYPE_TCP_ESTABLISHED, + I40IW_QHASH_MANAGE_TYPE_DELETE, + NULL, + false); + cm_node->qhash_set = 0; + } + + cm_node->cm_core->stats_nodes_destroyed++; + kfree(cm_node); +} + +/** + * i40iw_handle_fin_pkt - FIN packet received + * @cm_node: connection's node + */ +static void i40iw_handle_fin_pkt(struct i40iw_cm_node *cm_node) +{ + u32 ret = 0; + + switch (cm_node->state) { + case I40IW_CM_STATE_SYN_RCVD: + case I40IW_CM_STATE_SYN_SENT: + case I40IW_CM_STATE_ESTABLISHED: + case I40IW_CM_STATE_MPAREJ_RCVD: + cm_node->tcp_cntxt.rcv_nxt++; + i40iw_cleanup_retrans_entry(cm_node); + cm_node->state = I40IW_CM_STATE_LAST_ACK; + i40iw_send_fin(cm_node); + break; + case I40IW_CM_STATE_MPAREQ_SENT: + i40iw_create_event(cm_node, I40IW_CM_EVENT_ABORTED); + cm_node->tcp_cntxt.rcv_nxt++; + i40iw_cleanup_retrans_entry(cm_node); + cm_node->state = I40IW_CM_STATE_CLOSED; + atomic_inc(&cm_node->ref_count); + i40iw_send_reset(cm_node); + break; + case I40IW_CM_STATE_FIN_WAIT1: + cm_node->tcp_cntxt.rcv_nxt++; + i40iw_cleanup_retrans_entry(cm_node); + cm_node->state = I40IW_CM_STATE_CLOSING; + i40iw_send_ack(cm_node); + /* + * Wait for ACK as this is simultaneous close. + * After we receive ACK, do not send anything. + * Just rm the node. + */ + break; + case I40IW_CM_STATE_FIN_WAIT2: + cm_node->tcp_cntxt.rcv_nxt++; + i40iw_cleanup_retrans_entry(cm_node); + cm_node->state = I40IW_CM_STATE_TIME_WAIT; + i40iw_send_ack(cm_node); + ret = + i40iw_schedule_cm_timer(cm_node, NULL, I40IW_TIMER_TYPE_CLOSE, 1, 0); + if (ret) + i40iw_pr_err("node %p state = %d\n", cm_node, cm_node->state); + break; + case I40IW_CM_STATE_TIME_WAIT: + cm_node->tcp_cntxt.rcv_nxt++; + i40iw_cleanup_retrans_entry(cm_node); + cm_node->state = I40IW_CM_STATE_CLOSED; + i40iw_rem_ref_cm_node(cm_node); + break; + case I40IW_CM_STATE_OFFLOADED: + default: + i40iw_pr_err("bad state node %p state = %d\n", cm_node, cm_node->state); + break; + } +} + +/** + * i40iw_handle_rst_pkt - process received RST packet + * @cm_node: connection's node + * @rbuf: receive buffer + */ +static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node, + struct i40iw_puda_buf *rbuf) +{ + i40iw_cleanup_retrans_entry(cm_node); + switch (cm_node->state) { + case I40IW_CM_STATE_SYN_SENT: + case I40IW_CM_STATE_MPAREQ_SENT: + 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 = I40IW_CM_STATE_SYN_SENT; + if (i40iw_send_syn(cm_node, 0)) + i40iw_active_open_err(cm_node, false); + break; + case IETF_MPA_V1: + default: + i40iw_active_open_err(cm_node, false); + break; + } + break; + case I40IW_CM_STATE_MPAREQ_RCVD: + atomic_add_return(1, &cm_node->passive_state); + break; + case I40IW_CM_STATE_ESTABLISHED: + case I40IW_CM_STATE_SYN_RCVD: + case I40IW_CM_STATE_LISTENING: + i40iw_pr_err("Bad state state = %d\n", cm_node->state); + i40iw_passive_open_err(cm_node, false); + break; + case I40IW_CM_STATE_OFFLOADED: + i40iw_active_open_err(cm_node, false); + break; + case I40IW_CM_STATE_CLOSED: + break; + case I40IW_CM_STATE_FIN_WAIT2: + case I40IW_CM_STATE_FIN_WAIT1: + case I40IW_CM_STATE_LAST_ACK: + cm_node->cm_id->rem_ref(cm_node->cm_id); + case I40IW_CM_STATE_TIME_WAIT: + cm_node->state = I40IW_CM_STATE_CLOSED; + i40iw_rem_ref_cm_node(cm_node); + break; + default: + break; + } +} + +/** + * i40iw_handle_rcv_mpa - Process a recv'd mpa buffer + * @cm_node: connection's node + * @rbuf: receive buffer + */ +static void i40iw_handle_rcv_mpa(struct i40iw_cm_node *cm_node, + struct i40iw_puda_buf *rbuf) +{ + int ret = 0; + int datasize = rbuf->datalen; + u8 *dataloc = rbuf->data; + + enum i40iw_cm_event_type type = I40IW_CM_EVENT_UNKNOWN; + u32 res_type; + + ret = i40iw_parse_mpa(cm_node, dataloc, &res_type, datasize); + if (ret) { + if (cm_node->state == I40IW_CM_STATE_MPAREQ_SENT) + i40iw_active_open_err(cm_node, true); + else + i40iw_passive_open_err(cm_node, true); + return; + } + + switch (cm_node->state) { + case I40IW_CM_STATE_ESTABLISHED: + if (res_type == I40IW_MPA_REQUEST_REJECT) + i40iw_pr_err("state for reject\n"); + cm_node->state = I40IW_CM_STATE_MPAREQ_RCVD; + type = I40IW_CM_EVENT_MPA_REQ; + i40iw_send_ack(cm_node); /* ACK received MPA request */ + atomic_set(&cm_node->passive_state, + I40IW_PASSIVE_STATE_INDICATED); + break; + case I40IW_CM_STATE_MPAREQ_SENT: + i40iw_cleanup_retrans_entry(cm_node); + if (res_type == I40IW_MPA_REQUEST_REJECT) { + type = I40IW_CM_EVENT_MPA_REJECT; + cm_node->state = I40IW_CM_STATE_MPAREJ_RCVD; + } else { + type = I40IW_CM_EVENT_CONNECTED; + cm_node->state = I40IW_CM_STATE_OFFLOADED; + i40iw_send_ack(cm_node); + } + break; + default: + pr_err("%s wrong cm_node state =%d\n", __func__, cm_node->state); + break; + } + i40iw_create_event(cm_node, type); +} + +/** + * i40iw_indicate_pkt_err - Send up err event to cm + * @cm_node: connection's node + */ +static void i40iw_indicate_pkt_err(struct i40iw_cm_node *cm_node) +{ + switch (cm_node->state) { + case I40IW_CM_STATE_SYN_SENT: + case I40IW_CM_STATE_MPAREQ_SENT: + i40iw_active_open_err(cm_node, true); + break; + case I40IW_CM_STATE_ESTABLISHED: + case I40IW_CM_STATE_SYN_RCVD: + i40iw_passive_open_err(cm_node, true); + break; + case I40IW_CM_STATE_OFFLOADED: + default: + break; + } +} + +/** + * i40iw_check_syn - Check for error on received syn ack + * @cm_node: connection's node + * @tcph: pointer tcp header + */ +static int i40iw_check_syn(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) +{ + int err = 0; + + if (ntohl(tcph->ack_seq) != cm_node->tcp_cntxt.loc_seq_num) { + err = 1; + i40iw_active_open_err(cm_node, true); + } + return err; +} + +/** + * i40iw_check_seq - check seq numbers if OK + * @cm_node: connection's node + * @tcph: pointer tcp header + */ +static int i40iw_check_seq(struct i40iw_cm_node *cm_node, struct tcphdr *tcph) +{ + 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) { + i40iw_pr_err("seq number\n"); + i40iw_indicate_pkt_err(cm_node); + } + return err; +} + +/** + * i40iw_handle_syn_pkt - is for Passive node + * @cm_node: connection's node + * @rbuf: receive buffer + */ +static void i40iw_handle_syn_pkt(struct i40iw_cm_node *cm_node, + struct i40iw_puda_buf *rbuf) +{ + struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; + int ret; + u32 inc_sequence; + int optionsize; + struct i40iw_cm_info nfo; + + optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); + inc_sequence = ntohl(tcph->seq); + + switch (cm_node->state) { + case I40IW_CM_STATE_SYN_SENT: + case I40IW_CM_STATE_MPAREQ_SENT: + /* Rcvd syn on active open connection */ + i40iw_active_open_err(cm_node, 1); + break; + case I40IW_CM_STATE_LISTENING: + /* Passive OPEN */ + if (atomic_read(&cm_node->listener->pend_accepts_cnt) > + cm_node->listener->backlog) { + cm_node->cm_core->stats_backlog_drops++; + i40iw_passive_open_err(cm_node, false); + break; + } + ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); + if (ret) { + i40iw_passive_open_err(cm_node, false); + /* drop pkt */ + break; + } + cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; + cm_node->accept_pend = 1; + atomic_inc(&cm_node->listener->pend_accepts_cnt); + + cm_node->state = I40IW_CM_STATE_SYN_RCVD; + i40iw_get_addr_info(cm_node, &nfo); + ret = i40iw_manage_qhash(cm_node->iwdev, + &nfo, + I40IW_QHASH_TYPE_TCP_ESTABLISHED, + I40IW_QHASH_MANAGE_TYPE_ADD, + (void *)cm_node, + false); + cm_node->qhash_set = true; + break; + case I40IW_CM_STATE_CLOSED: + i40iw_cleanup_retrans_entry(cm_node); + atomic_inc(&cm_node->ref_count); + i40iw_send_reset(cm_node); + break; + case I40IW_CM_STATE_OFFLOADED: + case I40IW_CM_STATE_ESTABLISHED: + case I40IW_CM_STATE_FIN_WAIT1: + case I40IW_CM_STATE_FIN_WAIT2: + case I40IW_CM_STATE_MPAREQ_RCVD: + case I40IW_CM_STATE_LAST_ACK: + case I40IW_CM_STATE_CLOSING: + case I40IW_CM_STATE_UNKNOWN: + default: + break; + } +} + +/** + * i40iw_handle_synack_pkt - Process SYN+ACK packet (active side) + * @cm_node: connection's node + * @rbuf: receive buffer + */ +static void i40iw_handle_synack_pkt(struct i40iw_cm_node *cm_node, + struct i40iw_puda_buf *rbuf) +{ + struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; + int ret; + u32 inc_sequence; + int optionsize; + + optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); + inc_sequence = ntohl(tcph->seq); + switch (cm_node->state) { + case I40IW_CM_STATE_SYN_SENT: + i40iw_cleanup_retrans_entry(cm_node); + /* active open */ + if (i40iw_check_syn(cm_node, tcph)) { + i40iw_pr_err("check syn fail\n"); + return; + } + cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); + /* setup options */ + ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 0); + if (ret) { + i40iw_debug(cm_node->dev, + I40IW_DEBUG_CM, + "cm_node=%p tcp_options failed\n", + cm_node); + break; + } + i40iw_cleanup_retrans_entry(cm_node); + cm_node->tcp_cntxt.rcv_nxt = inc_sequence + 1; + i40iw_send_ack(cm_node); /* ACK for the syn_ack */ + ret = i40iw_send_mpa_request(cm_node); + if (ret) { + i40iw_debug(cm_node->dev, + I40IW_DEBUG_CM, + "cm_node=%p i40iw_send_mpa_request failed\n", + cm_node); + break; + } + cm_node->state = I40IW_CM_STATE_MPAREQ_SENT; + break; + case I40IW_CM_STATE_MPAREQ_RCVD: + i40iw_passive_open_err(cm_node, true); + break; + case I40IW_CM_STATE_LISTENING: + cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); + i40iw_cleanup_retrans_entry(cm_node); + cm_node->state = I40IW_CM_STATE_CLOSED; + i40iw_send_reset(cm_node); + break; + case I40IW_CM_STATE_CLOSED: + cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq); + i40iw_cleanup_retrans_entry(cm_node); + atomic_inc(&cm_node->ref_count); + i40iw_send_reset(cm_node); + break; + case I40IW_CM_STATE_ESTABLISHED: + case I40IW_CM_STATE_FIN_WAIT1: + case I40IW_CM_STATE_FIN_WAIT2: + case I40IW_CM_STATE_LAST_ACK: + case I40IW_CM_STATE_OFFLOADED: + case I40IW_CM_STATE_CLOSING: + case I40IW_CM_STATE_UNKNOWN: + case I40IW_CM_STATE_MPAREQ_SENT: + default: + break; + } +} + +/** + * i40iw_handle_ack_pkt - process packet with ACK + * @cm_node: connection's node + * @rbuf: receive buffer + */ +static int i40iw_handle_ack_pkt(struct i40iw_cm_node *cm_node, + struct i40iw_puda_buf *rbuf) +{ + struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; + u32 inc_sequence; + int ret = 0; + int optionsize; + u32 datasize = rbuf->datalen; + + optionsize = (tcph->doff << 2) - sizeof(struct tcphdr); + + if (i40iw_check_seq(cm_node, tcph)) + return -EINVAL; + + inc_sequence = ntohl(tcph->seq); + switch (cm_node->state) { + case I40IW_CM_STATE_SYN_RCVD: + i40iw_cleanup_retrans_entry(cm_node); + ret = i40iw_handle_tcp_options(cm_node, tcph, optionsize, 1); + if (ret) + break; + cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq); + cm_node->state = I40IW_CM_STATE_ESTABLISHED; + if (datasize) { + cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; + i40iw_get_remote_addr(cm_node); + i40iw_handle_rcv_mpa(cm_node, rbuf); + } + break; + case I40IW_CM_STATE_ESTABLISHED: + i40iw_cleanup_retrans_entry(cm_node); + if (datasize) { + cm_node->tcp_cntxt.rcv_nxt = inc_sequence + datasize; + i40iw_handle_rcv_mpa(cm_node, rbuf); + } + break; + case I40IW_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; + i40iw_handle_rcv_mpa(cm_node, rbuf); + } + break; + case I40IW_CM_STATE_LISTENING: + i40iw_cleanup_retrans_entry(cm_node); + cm_node->state = I40IW_CM_STATE_CLOSED; + i40iw_send_reset(cm_node); + break; + case I40IW_CM_STATE_CLOSED: + i40iw_cleanup_retrans_entry(cm_node); + atomic_inc(&cm_node->ref_count); + i40iw_send_reset(cm_node); + break; + case I40IW_CM_STATE_LAST_ACK: + case I40IW_CM_STATE_CLOSING: + i40iw_cleanup_retrans_entry(cm_node); + cm_node->state = I40IW_CM_STATE_CLOSED; + if (!cm_node->accept_pend) + cm_node->cm_id->rem_ref(cm_node->cm_id); + i40iw_rem_ref_cm_node(cm_node); + break; + case I40IW_CM_STATE_FIN_WAIT1: + i40iw_cleanup_retrans_entry(cm_node); + cm_node->state = I40IW_CM_STATE_FIN_WAIT2; + break; + case I40IW_CM_STATE_SYN_SENT: + case I40IW_CM_STATE_FIN_WAIT2: + case I40IW_CM_STATE_OFFLOADED: + case I40IW_CM_STATE_MPAREQ_RCVD: + case I40IW_CM_STATE_UNKNOWN: + default: + i40iw_cleanup_retrans_entry(cm_node); + break; + } + return ret; +} + +/** + * i40iw_process_packet - process cm packet + * @cm_node: connection's node + * @rbuf: receive buffer + */ +static void i40iw_process_packet(struct i40iw_cm_node *cm_node, + struct i40iw_puda_buf *rbuf) +{ + enum i40iw_tcpip_pkt_type pkt_type = I40IW_PKT_TYPE_UNKNOWN; + struct tcphdr *tcph = (struct tcphdr *)rbuf->tcph; + u32 fin_set = 0; + int ret = 0; + + if (tcph->rst) { + pkt_type = I40IW_PKT_TYPE_RST; + } else if (tcph->syn) { + pkt_type = I40IW_PKT_TYPE_SYN; + if (tcph->ack) + pkt_type = I40IW_PKT_TYPE_SYNACK; + } else if (tcph->ack) { + pkt_type = I40IW_PKT_TYPE_ACK; + } + if (tcph->fin) + fin_set = 1; + + switch (pkt_type) { + case I40IW_PKT_TYPE_SYN: + i40iw_handle_syn_pkt(cm_node, rbuf); + break; + case I40IW_PKT_TYPE_SYNACK: + i40iw_handle_synack_pkt(cm_node, rbuf); + break; + case I40IW_PKT_TYPE_ACK: + ret = i40iw_handle_ack_pkt(cm_node, rbuf); + if (fin_set && !ret) + i40iw_handle_fin_pkt(cm_node); + break; + case I40IW_PKT_TYPE_RST: + i40iw_handle_rst_pkt(cm_node, rbuf); + break; + default: + if ((fin_set) && + (!i40iw_check_seq(cm_node, (struct tcphdr *)rbuf->tcph))) + i40iw_handle_fin_pkt(cm_node); + break; + } +} + +/** + * i40iw_make_listen_node - create a listen node with params + * @cm_core: cm's core + * @iwdev: iwarp device structure + * @cm_info: quad info for connection + */ +static struct i40iw_cm_listener *i40iw_make_listen_node( + struct i40iw_cm_core *cm_core, + struct i40iw_device *iwdev, + struct i40iw_cm_info *cm_info) +{ + struct i40iw_cm_listener *listener; + struct iwpm_dev_data pm_reg_msg; + struct iwpm_sa_data pm_msg; + int iwpm_err; + unsigned long flags; + + /* cannot have multiple matching listeners */ + listener = i40iw_find_listener(cm_core, cm_info->loc_addr, + cm_info->loc_port, + cm_info->vlan_id, + I40IW_CM_LISTENER_EITHER_STATE, + false); + if (listener && + (listener->listener_state == I40IW_CM_LISTENER_ACTIVE_STATE)) { + atomic_dec(&listener->ref_count); + i40iw_debug(cm_core->dev, + I40IW_DEBUG_CM, + "Not creating listener since it already exists\n"); + return NULL; + } + + if (!listener) { + i40iw_form_reg_msg(iwdev, &pm_reg_msg); + iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_I40IW); + if (iwpm_err) + i40iw_pr_err("PM register fail err = %d\n", + iwpm_err); + + if (iwpm_valid_pid() && !iwpm_err) { + i40iw_form_pm_msg(cm_info, &pm_msg); + iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_I40IW); + if (iwpm_err) + i40iw_pr_err("PM query fail err = %d\n", + iwpm_err); + else + i40iw_record_pm_msg(cm_info, &pm_msg, false); + } + + /* create a CM listen node (1/2 node to compare incoming traffic to) */ + listener = kzalloc(sizeof(*listener), GFP_ATOMIC); + if (!listener) + return NULL; + cm_core->stats_listen_nodes_created++; + memcpy(listener->loc_addr, cm_info->loc_addr, sizeof(listener->loc_addr)); + memcpy(listener->map_loc_addr, cm_info->map_loc_addr, + sizeof(listener->map_loc_addr)); + listener->loc_port = cm_info->loc_port; + listener->map_loc_port = cm_info->map_loc_port; + + listener->reused_node = 0; + + INIT_LIST_HEAD(&listener->child_listen_list); + + atomic_set(&listener->ref_count, 1); + } else { + listener->reused_node = 1; + } + + listener->cm_id = cm_info->cm_id; + listener->ipv4 = cm_info->ipv4; + listener->vlan_id = cm_info->vlan_id; + atomic_set(&listener->pend_accepts_cnt, 0); + listener->cm_core = cm_core; + listener->iwdev = iwdev; + + listener->backlog = cm_info->backlog; + listener->listener_state = I40IW_CM_LISTENER_ACTIVE_STATE; + + if (!listener->reused_node) { + spin_lock_irqsave(&cm_core->listen_list_lock, flags); + list_add(&listener->list, &cm_core->listen_nodes); + spin_unlock_irqrestore(&cm_core->listen_list_lock, flags); + } + + return listener; +} + +/** + * i40iw_create_cm_node - make a connection node with params + * @cm_core: cm's core + * @iwdev: iwarp device structure + * @private_data_len: len to provate data for mpa request + * @private_data: pointer to private data for connection + * @cm_info: quad info for connection + */ +static struct i40iw_cm_node *i40iw_create_cm_node( + struct i40iw_cm_core *cm_core, + struct i40iw_device *iwdev, + u16 private_data_len, + void *private_data, + struct i40iw_cm_info *cm_info) +{ + int ret; + struct i40iw_cm_node *cm_node; + struct i40iw_cm_listener *loopback_remotelistener; + struct i40iw_cm_node *loopback_remotenode; + struct i40iw_cm_info loopback_cm_info; + + /* create a CM connection node */ + cm_node = i40iw_make_cm_node(cm_core, iwdev, 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 = I40IW_CM_DEFAULT_RCV_WND_SCALE; + + if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) { + loopback_remotelistener = i40iw_find_listener( + cm_core, + cm_info->map_rem_addr, + cm_node->map_rem_port, + cm_node->vlan_id, + I40IW_CM_LISTENER_ACTIVE_STATE, + true); + if (!loopback_remotelistener) { + i40iw_create_event(cm_node, I40IW_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.map_loc_port = cm_info->map_rem_port; + loopback_cm_info.map_rem_port = cm_info->map_loc_port; + loopback_cm_info.cm_id = loopback_remotelistener->cm_id; + loopback_cm_info.ipv4 = cm_info->ipv4; + loopback_remotenode = i40iw_make_cm_node(cm_core, + iwdev, + &loopback_cm_info, + loopback_remotelistener); + if (!loopback_remotenode) { + i40iw_rem_ref_cm_node(cm_node); + return NULL; + } + cm_core->stats_loopbacks++; + loopback_remotenode->loopbackpartner = cm_node; + loopback_remotenode->tcp_cntxt.rcv_wscale = + I40IW_CM_DEFAULT_RCV_WND_SCALE; + cm_node->loopbackpartner = loopback_remotenode; + memcpy(loopback_remotenode->pdata_buf, private_data, + private_data_len); + loopback_remotenode->pdata.size = private_data_len; + + cm_node->state = I40IW_CM_STATE_OFFLOADED; + cm_node->tcp_cntxt.rcv_nxt = + loopback_remotenode->tcp_cntxt.loc_seq_num; + loopback_remotenode->tcp_cntxt.rcv_nxt = + cm_node->tcp_cntxt.loc_seq_num; + cm_node->tcp_cntxt.max_snd_wnd = + loopback_remotenode->tcp_cntxt.rcv_wnd; + loopback_remotenode->tcp_cntxt.max_snd_wnd = cm_node->tcp_cntxt.rcv_wnd; + cm_node->tcp_cntxt.snd_wnd = loopback_remotenode->tcp_cntxt.rcv_wnd; + loopback_remotenode->tcp_cntxt.snd_wnd = cm_node->tcp_cntxt.rcv_wnd; + cm_node->tcp_cntxt.snd_wscale = loopback_remotenode->tcp_cntxt.rcv_wscale; + loopback_remotenode->tcp_cntxt.snd_wscale = cm_node->tcp_cntxt.rcv_wscale; + loopback_remotenode->state = I40IW_CM_STATE_MPAREQ_RCVD; + i40iw_create_event(loopback_remotenode, I40IW_CM_EVENT_MPA_REQ); + } + return cm_node; + } + + cm_node->pdata.size = private_data_len; + cm_node->pdata.addr = cm_node->pdata_buf; + + memcpy(cm_node->pdata_buf, private_data, private_data_len); + + cm_node->state = I40IW_CM_STATE_SYN_SENT; + ret = i40iw_send_syn(cm_node, 0); + + if (ret) { + if (cm_node->ipv4) + i40iw_debug(cm_node->dev, + I40IW_DEBUG_CM, + "Api - connect() FAILED: dest addr=%pI4", + cm_node->rem_addr); + else + i40iw_debug(cm_node->dev, I40IW_DEBUG_CM, + "Api - connect() FAILED: dest addr=%pI6", + cm_node->rem_addr); + i40iw_rem_ref_cm_node(cm_node); + cm_node = NULL; + } + + if (cm_node) + i40iw_debug(cm_node->dev, + I40IW_DEBUG_CM, + "Api - connect(): port=0x%04x, cm_node=%p, cm_id = %p.\n", + cm_node->rem_port, + cm_node, + cm_node->cm_id); + + return cm_node; +} + +/** + * i40iw_cm_reject - reject and teardown a connection + * @cm_node: connection's node + * @pdate: ptr to private data for reject + * @plen: size of private data + */ +static int i40iw_cm_reject(struct i40iw_cm_node *cm_node, const void *pdata, u8 plen) +{ + int ret = 0; + int err = 0; + int passive_state; + struct iw_cm_id *cm_id = cm_node->cm_id; + struct i40iw_cm_node *loopback = cm_node->loopbackpartner; + + if (cm_node->tcp_cntxt.client) + return ret; + i40iw_cleanup_retrans_entry(cm_node); + + if (!loopback) { + passive_state = atomic_add_return(1, &cm_node->passive_state); + if (passive_state == I40IW_SEND_RESET_EVENT) { + cm_node->state = I40IW_CM_STATE_CLOSED; + i40iw_rem_ref_cm_node(cm_node); + } else { + if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { + i40iw_rem_ref_cm_node(cm_node); + } else { + ret = i40iw_send_mpa_reject(cm_node, pdata, plen); + if (ret) { + cm_node->state = I40IW_CM_STATE_CLOSED; + err = i40iw_send_reset(cm_node); + if (err) + i40iw_pr_err("send reset failed\n"); + } else { + cm_id->add_ref(cm_id); + } + } + } + } else { + cm_node->cm_id = NULL; + if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { + i40iw_rem_ref_cm_node(cm_node); + i40iw_rem_ref_cm_node(loopback); + } else { + ret = i40iw_send_cm_event(loopback, + loopback->cm_id, + IW_CM_EVENT_CONNECT_REPLY, + -ECONNREFUSED); + i40iw_rem_ref_cm_node(cm_node); + loopback->state = I40IW_CM_STATE_CLOSING; + + cm_id = loopback->cm_id; + i40iw_rem_ref_cm_node(loopback); + cm_id->rem_ref(cm_id); + } + } + + return ret; +} + +/** + * i40iw_cm_close - close of cm connection + * @cm_node: connection's node + */ +static int i40iw_cm_close(struct i40iw_cm_node *cm_node) +{ + int ret = 0; + + if (!cm_node) + return -EINVAL; + + switch (cm_node->state) { + case I40IW_CM_STATE_SYN_RCVD: + case I40IW_CM_STATE_SYN_SENT: + case I40IW_CM_STATE_ONE_SIDE_ESTABLISHED: + case I40IW_CM_STATE_ESTABLISHED: + case I40IW_CM_STATE_ACCEPTING: + case I40IW_CM_STATE_MPAREQ_SENT: + case I40IW_CM_STATE_MPAREQ_RCVD: + i40iw_cleanup_retrans_entry(cm_node); + i40iw_send_reset(cm_node); + break; + case I40IW_CM_STATE_CLOSE_WAIT: + cm_node->state = I40IW_CM_STATE_LAST_ACK; + i40iw_send_fin(cm_node); + break; + case I40IW_CM_STATE_FIN_WAIT1: + case I40IW_CM_STATE_FIN_WAIT2: + case I40IW_CM_STATE_LAST_ACK: + case I40IW_CM_STATE_TIME_WAIT: + case I40IW_CM_STATE_CLOSING: + ret = -1; + break; + case I40IW_CM_STATE_LISTENING: + i40iw_cleanup_retrans_entry(cm_node); + i40iw_send_reset(cm_node); + break; + case I40IW_CM_STATE_MPAREJ_RCVD: + case I40IW_CM_STATE_UNKNOWN: + case I40IW_CM_STATE_INITED: + case I40IW_CM_STATE_CLOSED: + case I40IW_CM_STATE_LISTENER_DESTROYED: + i40iw_rem_ref_cm_node(cm_node); + break; + case I40IW_CM_STATE_OFFLOADED: + if (cm_node->send_entry) + i40iw_pr_err("send_entry\n"); + i40iw_rem_ref_cm_node(cm_node); + break; + } + return ret; +} + +/** + * i40iw_receive_ilq - recv an ETHERNET packet, and process it + * through CM + * @dev: FPK dev struct + * @rbuf: receive buffer + */ +void i40iw_receive_ilq(struct i40iw_sc_dev *dev, struct i40iw_puda_buf *rbuf) +{ + struct i40iw_cm_node *cm_node = NULL; + struct i40iw_cm_listener *listener = NULL; + struct iphdr *iph; + struct ipv6hdr *ip6h; + struct tcphdr *tcph; + struct i40iw_cm_info cm_info; + struct i40iw_device *iwdev = (struct i40iw_device *)dev->back_dev; + struct i40iw_cm_core *cm_core = &iwdev->cm_core; + struct vlan_ethhdr *ethh; + + /* if vlan, then maclen = 18 else 14 */ + iph = (struct iphdr *)rbuf->iph; + memset(&cm_info, 0, sizeof(cm_info)); + + i40iw_debug_buf(dev, + I40IW_DEBUG_ILQ, + "RECEIVE ILQ BUFFER", + rbuf->mem.va, + rbuf->totallen); + ethh = (struct vlan_ethhdr *)rbuf->mem.va; + + if (ethh->h_vlan_proto == htons(ETH_P_8021Q)) { + cm_info.vlan_id = ntohs(ethh->h_vlan_TCI) & VLAN_VID_MASK; + i40iw_debug(cm_core->dev, + I40IW_DEBUG_CM, + "%s vlan_id=%d\n", + __func__, + cm_info.vlan_id); + } else { + cm_info.vlan_id = I40IW_NO_VLAN; + } + tcph = (struct tcphdr *)rbuf->tcph; + + if (rbuf->ipv4) { + cm_info.loc_addr[0] = ntohl(iph->daddr); + cm_info.rem_addr[0] = ntohl(iph->saddr); + cm_info.ipv4 = true; + } else { + ip6h = (struct ipv6hdr *)rbuf->iph; + i40iw_copy_ip_ntohl(cm_info.loc_addr, + ip6h->daddr.in6_u.u6_addr32); + i40iw_copy_ip_ntohl(cm_info.rem_addr, + ip6h->saddr.in6_u.u6_addr32); + cm_info.ipv4 = false; + } + cm_info.loc_port = ntohs(tcph->dest); + cm_info.rem_port = ntohs(tcph->source); + i40iw_init_mapinfo(&cm_info); + + cm_node = i40iw_find_node(cm_core, + cm_info.map_rem_port, + cm_info.map_rem_addr, + cm_info.map_loc_port, + cm_info.map_loc_addr, + true); + + if (!cm_node) { + /* Only type of packet accepted are for */ + /* the PASSIVE open (syn only) */ + if ((!tcph->syn) || (tcph->ack)) + return; + listener = + i40iw_find_listener(cm_core, + cm_info.map_loc_addr, + cm_info.map_loc_port, + cm_info.vlan_id, + I40IW_CM_LISTENER_ACTIVE_STATE, + true); + if (!listener) { + cm_info.cm_id = NULL; + i40iw_debug(cm_core->dev, + I40IW_DEBUG_CM, + "%s no listener found\n", + __func__); + return; + } + cm_info.cm_id = listener->cm_id; + cm_node = i40iw_make_cm_node(cm_core, iwdev, &cm_info, listener); + if (!cm_node) { + i40iw_debug(cm_core->dev, + I40IW_DEBUG_CM, + "%s allocate node failed\n", + __func__); + atomic_dec(&listener->ref_count); + return; + } + if (!tcph->rst && !tcph->fin) { + cm_node->state = I40IW_CM_STATE_LISTENING; + } else { + i40iw_rem_ref_cm_node(cm_node); + return; + } + atomic_inc(&cm_node->ref_count); + } else if (cm_node->state == I40IW_CM_STATE_OFFLOADED) { + i40iw_rem_ref_cm_node(cm_node); + return; + } + i40iw_process_packet(cm_node, rbuf); + i40iw_rem_ref_cm_node(cm_node); +} + +/** + * i40iw_setup_cm_core - allocate a top level instance of a cm + * core + * @iwdev: iwarp device structure + */ +void i40iw_setup_cm_core(struct i40iw_device *iwdev) +{ + struct i40iw_cm_core *cm_core = &iwdev->cm_core; + + cm_core->iwdev = iwdev; + cm_core->dev = &iwdev->sc_dev; + + INIT_LIST_HEAD(&cm_core->connected_nodes); + INIT_LIST_HEAD(&cm_core->listen_nodes); + + init_timer(&cm_core->tcp_timer); + cm_core->tcp_timer.function = i40iw_cm_timer_tick; + cm_core->tcp_timer.data = (unsigned long)cm_core; + + spin_lock_init(&cm_core->ht_lock); + spin_lock_init(&cm_core->listen_list_lock); + + cm_core->event_wq = create_singlethread_workqueue("iwewq"); + cm_core->disconn_wq = create_singlethread_workqueue("iwdwq"); +} + +/** + * i40iw_cleanup_cm_core - deallocate a top level instance of a + * cm core + * @cm_core: cm's core + */ +void i40iw_cleanup_cm_core(struct i40iw_cm_core *cm_core) +{ + unsigned long flags; + + if (!cm_core) + return; + + spin_lock_irqsave(&cm_core->ht_lock, flags); + if (timer_pending(&cm_core->tcp_timer)) + del_timer_sync(&cm_core->tcp_timer); + spin_unlock_irqrestore(&cm_core->ht_lock, flags); + + destroy_workqueue(cm_core->event_wq); + destroy_workqueue(cm_core->disconn_wq); +} + +/** + * i40iw_init_tcp_ctx - setup qp context + * @cm_node: connection's node + * @tcp_info: offload info for tcp + * @iwqp: associate qp for the connection + */ +static void i40iw_init_tcp_ctx(struct i40iw_cm_node *cm_node, + struct i40iw_tcp_offload_info *tcp_info, + struct i40iw_qp *iwqp) +{ + tcp_info->ipv4 = cm_node->ipv4; + tcp_info->drop_ooo_seg = true; + tcp_info->wscale = true; + tcp_info->ignore_tcp_opt = true; + tcp_info->ignore_tcp_uns_opt = true; + tcp_info->no_nagle = false; + + tcp_info->ttl = cpu_to_le32(I40IW_DEFAULT_TTL); + tcp_info->rtt_var = cpu_to_le32(I40IW_DEFAULT_RTT_VAR); + tcp_info->ss_thresh = cpu_to_le32(I40IW_DEFAULT_SS_THRESH); + tcp_info->rexmit_thresh = I40IW_DEFAULT_REXMIT_THRESH; + + tcp_info->tcp_state = I40IW_TCP_STATE_ESTABLISHED; + tcp_info->snd_wscale = cm_node->tcp_cntxt.snd_wscale; + tcp_info->rcv_wscale = cm_node->tcp_cntxt.rcv_wscale; + + tcp_info->snd_nxt = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); + tcp_info->snd_wnd = cpu_to_le32(cm_node->tcp_cntxt.snd_wnd); + tcp_info->rcv_nxt = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); + tcp_info->snd_max = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); + + tcp_info->snd_una = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); + tcp_info->cwnd = cpu_to_le32(2 * cm_node->tcp_cntxt.mss); + tcp_info->snd_wl1 = cpu_to_le32(cm_node->tcp_cntxt.rcv_nxt); + tcp_info->snd_wl2 = cpu_to_le32(cm_node->tcp_cntxt.loc_seq_num); + tcp_info->max_snd_window = cpu_to_le32(cm_node->tcp_cntxt.max_snd_wnd); + tcp_info->rcv_wnd = cpu_to_le32(cm_node->tcp_cntxt.rcv_wnd << + cm_node->tcp_cntxt.rcv_wscale); + + tcp_info->flow_label = 0; + tcp_info->snd_mss = cpu_to_le32(((u32)cm_node->tcp_cntxt.mss)); + if (cm_node->vlan_id < VLAN_TAG_PRESENT) { + tcp_info->insert_vlan_tag = true; + tcp_info->vlan_tag = cpu_to_le16(cm_node->vlan_id); + } + if (cm_node->ipv4) { + tcp_info->src_port = cpu_to_le16(cm_node->map_loc_port); + tcp_info->dst_port = cpu_to_le16(cm_node->map_rem_port); + + tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->map_rem_addr[0]); + tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->map_loc_addr[0]); + tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table(iwqp->iwdev, + &tcp_info->dest_ip_addr3, + true, + NULL, + I40IW_ARP_RESOLVE)); + } else { + tcp_info->src_port = cpu_to_le16(cm_node->map_loc_port); + tcp_info->dst_port = cpu_to_le16(cm_node->map_rem_port); + tcp_info->dest_ip_addr0 = cpu_to_le32(cm_node->map_rem_addr[0]); + tcp_info->dest_ip_addr1 = cpu_to_le32(cm_node->map_rem_addr[1]); + tcp_info->dest_ip_addr2 = cpu_to_le32(cm_node->map_rem_addr[2]); + tcp_info->dest_ip_addr3 = cpu_to_le32(cm_node->map_rem_addr[3]); + tcp_info->local_ipaddr0 = cpu_to_le32(cm_node->map_loc_addr[0]); + tcp_info->local_ipaddr1 = cpu_to_le32(cm_node->map_loc_addr[1]); + tcp_info->local_ipaddr2 = cpu_to_le32(cm_node->map_loc_addr[2]); + tcp_info->local_ipaddr3 = cpu_to_le32(cm_node->map_loc_addr[3]); + tcp_info->arp_idx = cpu_to_le32(i40iw_arp_table( + iwqp->iwdev, + &tcp_info->dest_ip_addr0, + false, + NULL, + I40IW_ARP_RESOLVE)); + } +} + +/** + * i40iw_cm_init_tsa_conn - setup qp for RTS + * @iwqp: associate qp for the connection + * @cm_node: connection's node + */ +static void i40iw_cm_init_tsa_conn(struct i40iw_qp *iwqp, + struct i40iw_cm_node *cm_node) +{ + struct i40iw_tcp_offload_info tcp_info; + struct i40iwarp_offload_info *iwarp_info; + struct i40iw_qp_host_ctx_info *ctx_info; + struct i40iw_device *iwdev = iwqp->iwdev; + struct i40iw_sc_dev *dev = &iwqp->iwdev->sc_dev; + + memset(&tcp_info, 0x00, sizeof(struct i40iw_tcp_offload_info)); + iwarp_info = &iwqp->iwarp_info; + ctx_info = &iwqp->ctx_info; + + ctx_info->tcp_info = &tcp_info; + ctx_info->send_cq_num = iwqp->iwscq->sc_cq.cq_uk.cq_id; + ctx_info->rcv_cq_num = iwqp->iwrcq->sc_cq.cq_uk.cq_id; + + iwarp_info->ord_size = cm_node->ord_size; + iwarp_info->ird_size = i40iw_derive_hw_ird_setting(cm_node->ird_size); + + if (iwarp_info->ord_size == 1) + iwarp_info->ord_size = 2; + + iwarp_info->rd_enable = true; + iwarp_info->rdmap_ver = 1; + iwarp_info->ddp_ver = 1; + + iwarp_info->pd_id = iwqp->iwpd->sc_pd.pd_id; + + ctx_info->tcp_info_valid = true; + ctx_info->iwarp_info_valid = true; + + i40iw_init_tcp_ctx(cm_node, &tcp_info, iwqp); + if (cm_node->snd_mark_en) { + iwarp_info->snd_mark_en = true; + iwarp_info->snd_mark_offset = (tcp_info.snd_nxt & + SNDMARKER_SEQNMASK) + cm_node->lsmm_size; + } + + cm_node->state = I40IW_CM_STATE_OFFLOADED; + tcp_info.tcp_state = I40IW_TCP_STATE_ESTABLISHED; + tcp_info.src_mac_addr_idx = iwdev->mac_ip_table_idx; + + dev->iw_priv_qp_ops->qp_setctx(&iwqp->sc_qp, (u64 *)(iwqp->host_ctx.va), ctx_info); + + /* once tcp_info is set, no need to do it again */ + ctx_info->tcp_info_valid = false; + ctx_info->iwarp_info_valid = false; +} + +/** + * i40iw_cm_disconn - when a connection is being closed + * @iwqp: associate qp for the connection + */ +int i40iw_cm_disconn(struct i40iw_qp *iwqp) +{ + struct disconn_work *work; + struct i40iw_device *iwdev = iwqp->iwdev; + struct i40iw_cm_core *cm_core = &iwdev->cm_core; + + work = kzalloc(sizeof(*work), GFP_ATOMIC); + if (!work) + return -ENOMEM; /* Timer will clean up */ + + i40iw_add_ref(&iwqp->ibqp); + work->iwqp = iwqp; + INIT_WORK(&work->work, i40iw_disconnect_worker); + queue_work(cm_core->disconn_wq, &work->work); + return 0; +} + +/** + * i40iw_loopback_nop - Send a nop + * @qp: associated hw qp + */ +static void i40iw_loopback_nop(struct i40iw_sc_qp *qp) +{ + u64 *wqe; + u64 header; + + wqe = qp->qp_uk.sq_base; + + set_64bit_val(wqe, 0, 0); + set_64bit_val(wqe, 8, 0); + set_64bit_val(wqe, 16, 0); + + header = LS_64(I40IWQP_OP_NOP, I40IWQPSQ_OPCODE) | + LS_64(0, I40IWQPSQ_SIGCOMPL) | + LS_64(qp->qp_uk.swqe_polarity, I40IWQPSQ_VALID); + set_64bit_val(wqe, 24, header); +} + +/** + * i40iw_qp_disconnect - free qp and close cm + * @iwqp: associate qp for the connection + */ +static void i40iw_qp_disconnect(struct i40iw_qp *iwqp) +{ + struct i40iw_device *iwdev; + struct i40iw_ib_device *iwibdev; + + iwdev = to_iwdev(iwqp->ibqp.device); + if (!iwdev) { + i40iw_pr_err("iwdev == NULL\n"); + return; + } + + iwibdev = iwdev->iwibdev; + + if (iwqp->active_conn) { + /* indicate this connection is NOT active */ + iwqp->active_conn = 0; + } else { + /* Need to free the Last Streaming Mode Message */ + if (iwqp->ietf_mem.va) { + if (iwqp->lsmm_mr) + iwibdev->ibdev.dereg_mr(iwqp->lsmm_mr); + i40iw_free_dma_mem(iwdev->sc_dev.hw, &iwqp->ietf_mem); + } + } + + /* close the CM node down if it is still active */ + if (iwqp->cm_node) { + i40iw_debug(&iwdev->sc_dev, I40IW_DEBUG_CM, "%s Call close API\n", __func__); + i40iw_cm_close(iwqp->cm_node); + } +} + +/** + * i40iw_cm_disconn_true - called by worker thread to disconnect qp + * @iwqp: associate qp for the connection + */ +static void i40iw_cm_disconn_true(struct i40iw_qp *iwqp) +{ + int ret = 0; + struct iw_cm_id *cm_id; + struct i40iw_device *iwdev; + struct i40iw_sc_qp *qp = &iwqp->sc_qp; + 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; + struct ib_event ibevent; + unsigned long flags; + + if (!iwqp) { + i40iw_pr_err("iwqp == NULL\n"); + return; + } + + spin_lock_irqsave(&iwqp->lock, flags); + cm_id = iwqp->cm_id; + /* make sure we havent already closed this connection */ + if (!cm_id) { + spin_unlock_irqrestore(&iwqp->lock, flags); + return; + } + + iwdev = to_iwdev(iwqp->ibqp.device); + + original_hw_tcp_state = iwqp->hw_tcp_state; + original_ibqp_state = iwqp->ibqp_state; + last_ae = iwqp->last_aeq; + + if (qp->term_flags) { + issue_disconn = 1; + issue_close = 1; + iwqp->cm_id = NULL; + /*When term timer expires after cm_timer, don't want + *terminate-handler to issue cm_disconn which can re-free + *a QP even after its refcnt=0. + */ + del_timer(&iwqp->terminate_timer); + if (!iwqp->flush_issued) { + iwqp->flush_issued = 1; + issue_flush = 1; + } + } else if ((original_hw_tcp_state == I40IW_TCP_STATE_CLOSE_WAIT) || + ((original_ibqp_state == IB_QPS_RTS) && + (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) { + issue_disconn = 1; + if (last_ae == I40IW_AE_LLP_CONNECTION_RESET) + disconn_status = -ECONNRESET; + } + + if (((original_hw_tcp_state == I40IW_TCP_STATE_CLOSED) || + (original_hw_tcp_state == I40IW_TCP_STATE_TIME_WAIT) || + (last_ae == I40IW_AE_RDMAP_ROE_BAD_LLP_CLOSE) || + (last_ae == I40IW_AE_LLP_CONNECTION_RESET))) { + issue_close = 1; + iwqp->cm_id = NULL; + if (!iwqp->flush_issued) { + iwqp->flush_issued = 1; + issue_flush = 1; + } + } + + spin_unlock_irqrestore(&iwqp->lock, flags); + if (issue_flush && !iwqp->destroyed) { + /* Flush the queues */ + i40iw_flush_wqes(iwdev, iwqp); + + if (qp->term_flags) { + ibevent.device = iwqp->ibqp.device; + ibevent.event = (qp->eventtype == TERM_EVENT_QP_FATAL) ? + IB_EVENT_QP_FATAL : IB_EVENT_QP_ACCESS_ERR; + ibevent.element.qp = &iwqp->ibqp; + iwqp->ibqp.event_handler(&ibevent, iwqp->ibqp.qp_context); + } + } + + if (cm_id && cm_id->event_handler) { + if (issue_disconn) { + ret = i40iw_send_cm_event(NULL, + cm_id, + IW_CM_EVENT_DISCONNECT, + disconn_status); + + if (ret) + i40iw_debug(&iwdev->sc_dev, + I40IW_DEBUG_CM, + "disconnect event failed %s: - cm_id = %p\n", + __func__, cm_id); + } + if (issue_close) { + i40iw_qp_disconnect(iwqp); + cm_id->provider_data = iwqp; + ret = i40iw_send_cm_event(NULL, cm_id, IW_CM_EVENT_CLOSE, 0); + if (ret) + i40iw_debug(&iwdev->sc_dev, + I40IW_DEBUG_CM, + "close event failed %s: - cm_id = %p\n", + __func__, cm_id); + cm_id->rem_ref(cm_id); + } + } +} + +/** + * i40iw_disconnect_worker - worker for connection close + * @work: points or disconn structure + */ +static void i40iw_disconnect_worker(struct work_struct *work) +{ + struct disconn_work *dwork = container_of(work, struct disconn_work, work); + struct i40iw_qp *iwqp = dwork->iwqp; + + kfree(dwork); + i40iw_cm_disconn_true(iwqp); + i40iw_rem_ref(&iwqp->ibqp); +} + +/** + * i40iw_accept - registered call for connection to be accepted + * @cm_id: cm information for passive connection + * @conn_param: accpet parameters + */ +int i40iw_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) +{ + struct ib_qp *ibqp; + struct i40iw_qp *iwqp; + struct i40iw_device *iwdev; + struct i40iw_sc_dev *dev; + struct i40iw_cm_node *cm_node; + struct ib_qp_attr attr; + int passive_state; + struct i40iw_ib_device *iwibdev; + struct ib_mr *ibmr = NULL; + struct ib_phys_buf ibphysbuf; + struct i40iw_pd *iwpd; + u16 buf_len = 0; + struct i40iw_kmem_info accept; + enum i40iw_status_code status; + u64 tagged_offset; + + memset(&attr, 0, sizeof(attr)); + ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); + if (!ibqp) + return -EINVAL; + + iwqp = to_iwqp(ibqp); + iwdev = iwqp->iwdev; + dev = &iwdev->sc_dev; + cm_node = (struct i40iw_cm_node *)cm_id->provider_data; + + if (((struct sockaddr_in *)&cm_id->local_addr)->sin_family == AF_INET) { + cm_node->ipv4 = true; + cm_node->vlan_id = i40iw_get_vlan_ipv4(cm_node->loc_addr); + } else { + cm_node->ipv4 = false; + i40iw_netdev_vlan_ipv6(cm_node->loc_addr, &cm_node->vlan_id, NULL); + } + i40iw_debug(cm_node->dev, + I40IW_DEBUG_CM, + "Accept vlan_id=%d\n", + cm_node->vlan_id); + if (cm_node->state == I40IW_CM_STATE_LISTENER_DESTROYED) { + if (cm_node->loopbackpartner) + i40iw_rem_ref_cm_node(cm_node->loopbackpartner); + i40iw_rem_ref_cm_node(cm_node); + return -EINVAL; + } + + passive_state = atomic_add_return(1, &cm_node->passive_state); + if (passive_state == I40IW_SEND_RESET_EVENT) { + i40iw_rem_ref_cm_node(cm_node); + return -ECONNRESET; + } + + cm_node->cm_core->stats_accepts++; + iwqp->cm_node = (void *)cm_node; + cm_node->iwqp = iwqp; + + buf_len = conn_param->private_data_len + I40IW_MAX_IETF_SIZE + MPA_ZERO_PAD_LEN; + + status = i40iw_allocate_dma_mem(dev->hw, &iwqp->ietf_mem, buf_len, 1); + + if (status) + return -ENOMEM; + cm_node->pdata.size = conn_param->private_data_len; + accept.addr = iwqp->ietf_mem.va; + accept.size = i40iw_cm_build_mpa_frame(cm_node, &accept, MPA_KEY_REPLY); + memcpy(accept.addr + accept.size, conn_param->private_data, + conn_param->private_data_len); + + /* setup our first outgoing iWarp send WQE (the IETF frame response) */ + if ((cm_node->ipv4 && + !i40iw_ipv4_is_loopback(cm_node->loc_addr[0], cm_node->rem_addr[0])) || + (!cm_node->ipv4 && + !i40iw_ipv6_is_loopback(cm_node->loc_addr, cm_node->rem_addr))) { + iwibdev = iwdev->iwibdev; + iwpd = iwqp->iwpd; + ibphysbuf.addr = iwqp->ietf_mem.pa; + ibphysbuf.size = buf_len; + tagged_offset = (uintptr_t)iwqp->ietf_mem.va; + ibmr = iwibdev->ibdev.reg_phys_mr((struct ib_pd *)iwpd, + &ibphysbuf, + 1, + IB_ACCESS_LOCAL_WRITE, + &tagged_offset); + if (!ibmr) { + i40iw_free_dma_mem(dev->hw, &iwqp->ietf_mem); + return -ENOMEM; + } + + ibmr->pd = &iwpd->ibpd; + ibmr->device = iwpd->ibpd.device; + iwqp->lsmm_mr = ibmr; + + if (is_remote_ne020_or_chelsio(cm_node)) + dev->iw_priv_qp_ops->qp_send_lsmm( + &iwqp->sc_qp, + iwqp->ietf_mem.va, + (accept.size + conn_param->private_data_len), + ibmr->lkey); + else + dev->iw_priv_qp_ops->qp_send_lsmm( + &iwqp->sc_qp, + iwqp->ietf_mem.va, + (accept.size + conn_param->private_data_len + MPA_ZERO_PAD_LEN), + ibmr->lkey); + + } else { + i40iw_loopback_nop(&iwqp->sc_qp); + } + + if (iwqp->sq_kmapped) { + iwqp->sq_kmapped = 0; + kunmap(iwqp->page); + } + + iwqp->cm_id = cm_id; + cm_node->cm_id = cm_id; + + cm_id->provider_data = (void *)iwqp; + iwqp->active_conn = 0; + + cm_node->lsmm_size = accept.size + conn_param->private_data_len; + i40iw_cm_init_tsa_conn(iwqp, cm_node); + cm_id->add_ref(cm_id); + i40iw_add_ref(&iwqp->ibqp); + + i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_ESTABLISHED, 0); + + attr.qp_state = IB_QPS_RTS; + cm_node->qhash_set = false; + i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); + if (cm_node->loopbackpartner) { + cm_node->loopbackpartner->pdata.size = conn_param->private_data_len; + + /* copy entire MPA frame to our cm_node's frame */ + memcpy(cm_node->loopbackpartner->pdata_buf, + conn_param->private_data, + conn_param->private_data_len); + i40iw_create_event(cm_node->loopbackpartner, I40IW_CM_EVENT_CONNECTED); + } + + cm_node->accelerated = 1; + if (cm_node->accept_pend) { + if (!cm_node->listener) + i40iw_pr_err("cm_node->listener NULL for passive node\n"); + atomic_dec(&cm_node->listener->pend_accepts_cnt); + cm_node->accept_pend = 0; + } + return 0; +} + +/** + * i40iw_reject - registered call for connection to be rejected + * @cm_id: cm information for passive connection + * @pdata: private data to be sent + * @pdata_len: private data length + */ +int i40iw_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) +{ + struct i40iw_device *iwdev; + struct i40iw_cm_node *cm_node; + struct i40iw_cm_node *loopback; + + cm_node = (struct i40iw_cm_node *)cm_id->provider_data; + loopback = cm_node->loopbackpartner; + cm_node->cm_id = cm_id; + cm_node->pdata.size = pdata_len; + + iwdev = to_iwdev(cm_id->device); + if (!iwdev) + return -EINVAL; + cm_node->cm_core->stats_rejects++; + + if (pdata_len + sizeof(struct ietf_mpa_v2) > MAX_CM_BUFFER) + return -EINVAL; + + if (loopback) { + memcpy(&loopback->pdata_buf, pdata, pdata_len); + loopback->pdata.size = pdata_len; + } + + return i40iw_cm_reject(cm_node, pdata, pdata_len); +} + +/** + * i40iw_connect - registered call for connection to be established + * @cm_id: cm information for passive connection + * @conn_param: Information about the connection + */ +int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) +{ + struct ib_qp *ibqp; + struct i40iw_qp *iwqp; + struct i40iw_device *iwdev; + struct i40iw_cm_node *cm_node; + struct i40iw_cm_info cm_info; + struct sockaddr_in *laddr; + struct sockaddr_in *raddr; + struct sockaddr_in6 *laddr6; + struct sockaddr_in6 *raddr6; + struct iwpm_dev_data pm_reg_msg; + struct iwpm_sa_data pm_msg; + int apbvt_set = 0; + enum i40iw_status_code status; + int iwpm_err; + + ibqp = i40iw_get_qp(cm_id->device, conn_param->qpn); + if (!ibqp) + return -EINVAL; + iwqp = to_iwqp(ibqp); + if (!iwqp) + return -EINVAL; + iwdev = to_iwdev(iwqp->ibqp.device); + if (!iwdev) + return -EINVAL; + + laddr = (struct sockaddr_in *)&cm_id->local_addr; + raddr = (struct sockaddr_in *)&cm_id->remote_addr; + laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr; + raddr6 = (struct sockaddr_in6 *)&cm_id->remote_addr; + + if (!(laddr->sin_port) || !(raddr->sin_port)) + return -EINVAL; + + iwqp->active_conn = 1; + iwqp->cm_id = NULL; + cm_id->provider_data = iwqp; + + /* set up the connection params for the node */ + if (cm_id->remote_addr.ss_family == AF_INET) { + cm_info.ipv4 = true; + memset(cm_info.loc_addr, 0, sizeof(cm_info.loc_addr)); + memset(cm_info.rem_addr, 0, sizeof(cm_info.rem_addr)); + cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); + cm_info.rem_addr[0] = ntohl(raddr->sin_addr.s_addr); + cm_info.loc_port = ntohs(laddr->sin_port); + cm_info.rem_port = ntohs(raddr->sin_port); + cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); + } else { + cm_info.ipv4 = false; + i40iw_copy_ip_ntohl(cm_info.loc_addr, + laddr6->sin6_addr.in6_u.u6_addr32); + i40iw_copy_ip_ntohl(cm_info.rem_addr, + raddr6->sin6_addr.in6_u.u6_addr32); + cm_info.loc_port = ntohs(laddr6->sin6_port); + cm_info.rem_port = ntohs(raddr6->sin6_port); + i40iw_netdev_vlan_ipv6(cm_info.loc_addr, &cm_info.vlan_id, NULL); + } + i40iw_init_mapinfo(&cm_info); + cm_info.cm_id = cm_id; + + i40iw_form_reg_msg(iwdev, &pm_reg_msg); + iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_I40IW); + if (iwpm_err) + i40iw_pr_err("PM register fail err = %d\n", + iwpm_err); + + if (iwpm_valid_pid() && !iwpm_err) { + i40iw_form_pm_msg(&cm_info, &pm_msg); + iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_I40IW); + if (iwpm_err) + i40iw_pr_err("PM query fail err = %d\n", + iwpm_err); + else + i40iw_record_pm_msg(&cm_info, &pm_msg, true); + } + + if (i40iw_create_mapinfo(&cm_info)) { + i40iw_pr_err("Fail to create mapinfo\n"); + return -ENOMEM; + } + + if ((cm_info.ipv4 && (laddr->sin_addr.s_addr != raddr->sin_addr.s_addr)) || + (!cm_info.ipv4 && memcmp(laddr6->sin6_addr.in6_u.u6_addr32, + raddr6->sin6_addr.in6_u.u6_addr32, + sizeof(laddr6->sin6_addr.in6_u.u6_addr32)))) { + status = i40iw_manage_qhash(iwdev, + &cm_info, + I40IW_QHASH_TYPE_TCP_ESTABLISHED, + I40IW_QHASH_MANAGE_TYPE_ADD, + NULL, + true); + if (status) { + i40iw_remove_mapinfo(&cm_info); + return -EINVAL; + } + } + status = i40iw_manage_apbvt(iwdev, cm_info.map_loc_port, I40IW_MANAGE_APBVT_ADD); + if (status) { + i40iw_remove_mapinfo(&cm_info); + i40iw_manage_qhash(iwdev, + &cm_info, + I40IW_QHASH_TYPE_TCP_ESTABLISHED, + I40IW_QHASH_MANAGE_TYPE_DELETE, + NULL, + false); + return -EINVAL; + } + + apbvt_set = 1; + cm_id->add_ref(cm_id); + cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev, + conn_param->private_data_len, + (void *)conn_param->private_data, + &cm_info); + if (!cm_node) { + i40iw_manage_qhash(iwdev, + &cm_info, + I40IW_QHASH_TYPE_TCP_ESTABLISHED, + I40IW_QHASH_MANAGE_TYPE_DELETE, + NULL, + false); + + if (apbvt_set && !i40iw_listen_port_in_use(&iwdev->cm_core, + cm_info.map_loc_port)) + i40iw_manage_apbvt(iwdev, + cm_info.map_loc_port, + I40IW_MANAGE_APBVT_DEL); + + i40iw_remove_mapinfo(&cm_info); + cm_id->rem_ref(cm_id); + iwdev->cm_core.stats_connect_errs++; + return -ENOMEM; + } + + i40iw_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) + cm_node->ord_size = 1; + + cm_node->apbvt_set = apbvt_set; + cm_node->qhash_set = true; + iwqp->cm_node = cm_node; + cm_node->iwqp = iwqp; + iwqp->cm_id = cm_id; + i40iw_add_ref(&iwqp->ibqp); + return 0; +} + +/** + * i40iw_create_listen - registered call creating listener + * @cm_id: cm information for passive connection + * @backlog: to max accept pending count + */ +int i40iw_create_listen(struct iw_cm_id *cm_id, int backlog) +{ + struct i40iw_device *iwdev; + struct i40iw_cm_listener *cm_listen_node; + struct i40iw_cm_info cm_info; + enum i40iw_status_code ret; + struct sockaddr_in *laddr; + struct sockaddr_in6 *laddr6; + bool wildcard = false; + + iwdev = to_iwdev(cm_id->device); + if (!iwdev) + return -EINVAL; + + laddr = (struct sockaddr_in *)&cm_id->local_addr; + laddr6 = (struct sockaddr_in6 *)&cm_id->local_addr; + memset(&cm_info, 0, sizeof(cm_info)); + if (laddr->sin_family == AF_INET) { + cm_info.ipv4 = true; + cm_info.loc_addr[0] = ntohl(laddr->sin_addr.s_addr); + cm_info.loc_port = ntohs(laddr->sin_port); + + if (laddr->sin_addr.s_addr != INADDR_ANY) + cm_info.vlan_id = i40iw_get_vlan_ipv4(cm_info.loc_addr); + else + wildcard = true; + + } else { + cm_info.ipv4 = false; + i40iw_copy_ip_ntohl(cm_info.loc_addr, + laddr6->sin6_addr.in6_u.u6_addr32); + cm_info.loc_port = ntohs(laddr6->sin6_port); + if (ipv6_addr_type(&laddr6->sin6_addr) != IPV6_ADDR_ANY) + i40iw_netdev_vlan_ipv6(cm_info.loc_addr, + &cm_info.vlan_id, + NULL); + else + wildcard = true; + } + i40iw_init_mapinfo(&cm_info); + cm_info.backlog = backlog; + cm_info.cm_id = cm_id; + + cm_listen_node = i40iw_make_listen_node(&iwdev->cm_core, iwdev, &cm_info); + if (!cm_listen_node) { + i40iw_pr_err("cm_listen_node == NULL\n"); + return -ENOMEM; + } + + cm_id->provider_data = cm_listen_node; + + if (!cm_listen_node->reused_node) { + if (i40iw_create_mapinfo(&cm_info)) + goto error; + if (wildcard) { + if (cm_info.ipv4) + ret = i40iw_add_mqh_4(iwdev, + &cm_info, + cm_listen_node); + else + ret = i40iw_add_mqh_6(iwdev, + &cm_info, + cm_listen_node); + if (ret) + goto error; + + ret = i40iw_manage_apbvt(iwdev, + cm_info.map_loc_port, + I40IW_MANAGE_APBVT_ADD); + + if (ret) + goto error; + } else { + ret = i40iw_manage_qhash(iwdev, + &cm_info, + I40IW_QHASH_TYPE_TCP_SYN, + I40IW_QHASH_MANAGE_TYPE_ADD, + NULL, + true); + if (ret) + goto error; + cm_listen_node->qhash_set = true; + ret = i40iw_manage_apbvt(iwdev, + cm_info.map_loc_port, + I40IW_MANAGE_APBVT_ADD); + if (ret) + goto error; + } + } + cm_id->add_ref(cm_id); + cm_listen_node->cm_core->stats_listen_created++; + return 0; + error: + i40iw_cm_del_listen(&iwdev->cm_core, (void *)cm_listen_node, false); + return -EINVAL; +} + +/** + * i40iw_destroy_listen - registered call to destroy listener + * @cm_id: cm information for passive connection + */ +int i40iw_destroy_listen(struct iw_cm_id *cm_id) +{ + struct i40iw_device *iwdev; + + iwdev = to_iwdev(cm_id->device); + if (cm_id->provider_data) + i40iw_cm_del_listen(&iwdev->cm_core, cm_id->provider_data, true); + else + i40iw_pr_err("cm_id->provider_data was NULL\n"); + + cm_id->rem_ref(cm_id); + + return 0; +} + +/** + * i40iw_cm_event_connected - handle connected active node + * @event: the info for cm_node of connection + */ +static void i40iw_cm_event_connected(struct i40iw_cm_event *event) +{ + struct i40iw_qp *iwqp; + struct i40iw_device *iwdev; + struct i40iw_cm_node *cm_node; + struct i40iw_sc_dev *dev; + struct ib_qp_attr attr = { 0 }; + struct iw_cm_id *cm_id; + int status = 0; + bool read0; + + cm_node = event->cm_node; + cm_id = cm_node->cm_id; + iwqp = (struct i40iw_qp *)cm_id->provider_data; + iwdev = to_iwdev(iwqp->ibqp.device); + dev = &iwdev->sc_dev; + + if (iwqp->destroyed) { + status = -ETIMEDOUT; + goto error; + } + i40iw_cm_init_tsa_conn(iwqp, cm_node); + + read0 = (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO); + dev->iw_priv_qp_ops->qp_send_rtt(&iwqp->sc_qp, read0); + status = i40iw_send_cm_event(cm_node, cm_id, IW_CM_EVENT_CONNECT_REPLY, 0); + if (status) + i40iw_pr_err("send cm event\n"); + attr.qp_state = IB_QPS_RTS; + cm_node->qhash_set = false; + i40iw_modify_qp(&iwqp->ibqp, &attr, IB_QP_STATE, NULL); + + cm_node->accelerated = 1; + if (cm_node->accept_pend) { + if (!cm_node->listener) + i40iw_pr_err("listener is null for passive node\n"); + atomic_dec(&cm_node->listener->pend_accepts_cnt); + cm_node->accept_pend = 0; + } + return; + +error: + iwqp->cm_id = NULL; + cm_id->provider_data = NULL; + i40iw_send_cm_event(event->cm_node, + cm_id, + IW_CM_EVENT_CONNECT_REPLY, + status); + cm_id->rem_ref(cm_id); + i40iw_rem_ref_cm_node(event->cm_node); +} + +/** + * i40iw_cm_event_reset - handle reset + * @event: the info for cm_node of connection + */ +static void i40iw_cm_event_reset(struct i40iw_cm_event *event) +{ + struct i40iw_cm_node *cm_node = event->cm_node; + struct iw_cm_id *cm_id = cm_node->cm_id; + struct i40iw_qp *iwqp; + + if (!cm_id) + return; + + iwqp = cm_id->provider_data; + if (!iwqp) + return; + + i40iw_debug(cm_node->dev, + I40IW_DEBUG_CM, + "reset event %p - cm_id = %p\n", + event->cm_node, cm_id); + iwqp->cm_id = NULL; + + i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_DISCONNECT, -ECONNRESET); + i40iw_send_cm_event(cm_node, cm_node->cm_id, IW_CM_EVENT_CLOSE, 0); +} + +/** + * i40iw_cm_event_handler - worker thread callback to send event to cm upper layer + * @work: pointer of cm event info. + */ +static void i40iw_cm_event_handler(struct work_struct *work) +{ + struct i40iw_cm_event *event = container_of(work, + struct i40iw_cm_event, + event_work); + struct i40iw_cm_node *cm_node; + + if ((!event) || (!event->cm_node) || (!event->cm_node->cm_core)) + return; + + cm_node = event->cm_node; + + switch (event->type) { + case I40IW_CM_EVENT_MPA_REQ: + i40iw_send_cm_event(cm_node, + cm_node->cm_id, + IW_CM_EVENT_CONNECT_REQUEST, + 0); + break; + case I40IW_CM_EVENT_RESET: + i40iw_cm_event_reset(event); + break; + case I40IW_CM_EVENT_CONNECTED: + if ((!event->cm_node->cm_id) || + (event->cm_node->state != I40IW_CM_STATE_OFFLOADED)) + break; + i40iw_cm_event_connected(event); + break; + case I40IW_CM_EVENT_MPA_REJECT: + if ((!event->cm_node->cm_id) || + (cm_node->state == I40IW_CM_STATE_OFFLOADED)) + break; + i40iw_send_cm_event(cm_node, + cm_node->cm_id, + IW_CM_EVENT_CONNECT_REPLY, + -ECONNREFUSED); + break; + case I40IW_CM_EVENT_ABORTED: + if ((!event->cm_node->cm_id) || + (event->cm_node->state == I40IW_CM_STATE_OFFLOADED)) + break; + i40iw_event_connect_error(event); + break; + default: + i40iw_pr_err("event type = %d\n", event->type); + break; + } + + event->cm_info.cm_id->rem_ref(event->cm_info.cm_id); + i40iw_rem_ref_cm_node(event->cm_node); + kfree(event); +} + +/** + * i40iw_cm_post_event - queue event request for worker thread + * @event: cm node's info for up event call + */ +static void i40iw_cm_post_event(struct i40iw_cm_event *event) +{ + atomic_inc(&event->cm_node->ref_count); + event->cm_info.cm_id->add_ref(event->cm_info.cm_id); + INIT_WORK(&event->event_work, i40iw_cm_event_handler); + + queue_work(event->cm_node->cm_core->event_wq, &event->event_work); +} diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.h b/drivers/infiniband/hw/i40iw/i40iw_cm.h new file mode 100644 index 0000000..5f8ceb4 --- /dev/null +++ b/drivers/infiniband/hw/i40iw/i40iw_cm.h @@ -0,0 +1,456 @@ +/******************************************************************************* +* +* Copyright (c) 2015 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 +* OpenFabrics.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. +* +*******************************************************************************/ + +#ifndef I40IW_CM_H +#define I40IW_CM_H + +#define QUEUE_EVENTS + +#define I40IW_MANAGE_APBVT_DEL 0 +#define I40IW_MANAGE_APBVT_ADD 1 + +#define I40IW_MPA_REQUEST_ACCEPT 1 +#define I40IW_MPA_REQUEST_REJECT 2 + +/* IETF MPA -- defines, enums, structs */ +#define IEFT_MPA_KEY_REQ "MPA ID Req Frame" +#define IEFT_MPA_KEY_REP "MPA ID Rep Frame" +#define IETF_MPA_KEY_SIZE 16 +#define IETF_MPA_VERSION 1 +#define IETF_MAX_PRIV_DATA_LEN 512 +#define IETF_MPA_FRAME_SIZE 20 +#define IETF_RTR_MSG_SIZE 4 +#define IETF_MPA_V2_FLAG 0x10 +#define SNDMARKER_SEQNMASK 0x000001FF + +#define I40IW_MAX_IETF_SIZE 32 + +#define MPA_ZERO_PAD_LEN 4 + +/* IETF RTR MSG Fields */ +#define IETF_PEER_TO_PEER 0x8000 +#define IETF_FLPDU_ZERO_LEN 0x4000 +#define IETF_RDMA0_WRITE 0x8000 +#define IETF_RDMA0_READ 0x4000 +#define IETF_NO_IRD_ORD 0x3FFF + +/* HW-supported IRD sizes*/ +#define I40IW_HW_IRD_SETTING_2 2 +#define I40IW_HW_IRD_SETTING_4 4 +#define I40IW_HW_IRD_SETTING_8 8 +#define I40IW_HW_IRD_SETTING_16 16 +#define I40IW_HW_IRD_SETTING_32 32 +#define I40IW_HW_IRD_SETTING_64 64 + +enum ietf_mpa_flags { + IETF_MPA_FLAGS_MARKERS = 0x80, /* receive Markers */ + IETF_MPA_FLAGS_CRC = 0x40, /* receive Markers */ + IETF_MPA_FLAGS_REJECT = 0x20, /* Reject */ +}; + +struct ietf_mpa_v1 { + u8 key[IETF_MPA_KEY_SIZE]; + u8 flags; + u8 rev; + __be16 priv_data_len; + u8 priv_data[0]; +}; + +#define ietf_mpa_req_resp_frame ietf_mpa_frame + +struct ietf_rtr_msg { + __be16 ctrl_ird; + __be16 ctrl_ord; +}; + +struct ietf_mpa_v2 { + u8 key[IETF_MPA_KEY_SIZE]; + u8 flags; + u8 rev; + __be16 priv_data_len; + struct ietf_rtr_msg rtr_msg; + u8 priv_data[0]; +}; + +struct i40iw_cm_node; +enum i40iw_timer_type { + I40IW_TIMER_TYPE_SEND, + I40IW_TIMER_TYPE_RECV, + I40IW_TIMER_NODE_CLEANUP, + I40IW_TIMER_TYPE_CLOSE, +}; + +#define I40IW_PASSIVE_STATE_INDICATED 0 +#define I40IW_DO_NOT_SEND_RESET_EVENT 1 +#define I40IW_SEND_RESET_EVENT 2 + +#define MAX_I40IW_IFS 4 + +#define SET_ACK 0x1 +#define SET_SYN 0x2 +#define SET_FIN 0x4 +#define SET_RST 0x8 + +#define TCP_OPTIONS_PADDING 3 + +struct option_base { + u8 optionnum; + u8 length; +}; + +enum option_numbers { + OPTION_NUMBER_END, + OPTION_NUMBER_NONE, + OPTION_NUMBER_MSS, + OPTION_NUMBER_WINDOW_SCALE, + OPTION_NUMBER_SACK_PERM, + OPTION_NUMBER_SACK, + OPTION_NUMBER_WRITE0 = 0xbc +}; + +struct option_mss { + u8 optionnum; + u8 length; + __be16 mss; +}; + +struct option_windowscale { + u8 optionnum; + u8 length; + u8 shiftcount; +}; + +union all_known_options { + char as_end; + struct option_base as_base; + struct option_mss as_mss; + struct option_windowscale as_windowscale; +}; + +struct i40iw_timer_entry { + struct list_head list; + unsigned long timetosend; /* jiffies */ + struct i40iw_puda_buf *sqbuf; + u32 type; + u32 retrycount; + u32 retranscount; + u32 context; + u32 send_retrans; + int close_when_complete; +}; + +#define I40IW_DEFAULT_RETRYS 64 +#define I40IW_DEFAULT_RETRANS 8 +#define I40IW_DEFAULT_TTL 0x40 +#define I40IW_DEFAULT_RTT_VAR 0x6 +#define I40IW_DEFAULT_SS_THRESH 0x3FFFFFFF +#define I40IW_DEFAULT_REXMIT_THRESH 8 + +#define I40IW_RETRY_TIMEOUT HZ +#define I40IW_SHORT_TIME 10 +#define I40IW_LONG_TIME (2 * HZ) +#define I40IW_MAX_TIMEOUT ((unsigned long)(12 * HZ)) + +#define I40IW_CM_HASHTABLE_SIZE 1024 +#define I40IW_CM_TCP_TIMER_INTERVAL 3000 +#define I40IW_CM_DEFAULT_MTU 1540 +#define I40IW_CM_DEFAULT_FRAME_CNT 10 +#define I40IW_CM_THREAD_STACK_SIZE 256 +#define I40IW_CM_DEFAULT_RCV_WND 64240 +#define I40IW_CM_DEFAULT_RCV_WND_SCALED 0x3fffc +#define I40IW_CM_DEFAULT_RCV_WND_SCALE 2 +#define I40IW_CM_DEFAULT_FREE_PKTS 0x000A +#define I40IW_CM_FREE_PKT_LO_WATERMARK 2 + +#define I40IW_CM_DEFAULT_MSS 536 + +#define I40IW_CM_DEF_SEQ 0x159bf75f +#define I40IW_CM_DEF_LOCAL_ID 0x3b47 + +#define I40IW_CM_DEF_SEQ2 0x18ed5740 +#define I40IW_CM_DEF_LOCAL_ID2 0xb807 +#define MAX_CM_BUFFER (I40IW_MAX_IETF_SIZE + IETF_MAX_PRIV_DATA_LEN) + +typedef u32 i40iw_addr_t; + +#define i40iw_cm_tsa_context i40iw_qp_context + +struct i40iw_qp; + +/* cm node transition states */ +enum i40iw_cm_node_state { + I40IW_CM_STATE_UNKNOWN, + I40IW_CM_STATE_INITED, + I40IW_CM_STATE_LISTENING, + I40IW_CM_STATE_SYN_RCVD, + I40IW_CM_STATE_SYN_SENT, + I40IW_CM_STATE_ONE_SIDE_ESTABLISHED, + I40IW_CM_STATE_ESTABLISHED, + I40IW_CM_STATE_ACCEPTING, + I40IW_CM_STATE_MPAREQ_SENT, + I40IW_CM_STATE_MPAREQ_RCVD, + I40IW_CM_STATE_MPAREJ_RCVD, + I40IW_CM_STATE_OFFLOADED, + I40IW_CM_STATE_FIN_WAIT1, + I40IW_CM_STATE_FIN_WAIT2, + I40IW_CM_STATE_CLOSE_WAIT, + I40IW_CM_STATE_TIME_WAIT, + I40IW_CM_STATE_LAST_ACK, + I40IW_CM_STATE_CLOSING, + I40IW_CM_STATE_LISTENER_DESTROYED, + I40IW_CM_STATE_CLOSED +}; + +enum mpa_frame_version { + IETF_MPA_V1 = 1, + IETF_MPA_V2 = 2 +}; + +enum mpa_frame_key { + MPA_KEY_REQUEST, + MPA_KEY_REPLY +}; + +enum send_rdma0 { + SEND_RDMA_READ_ZERO = 1, + SEND_RDMA_WRITE_ZERO = 2 +}; + +enum i40iw_tcpip_pkt_type { + I40IW_PKT_TYPE_UNKNOWN, + I40IW_PKT_TYPE_SYN, + I40IW_PKT_TYPE_SYNACK, + I40IW_PKT_TYPE_ACK, + I40IW_PKT_TYPE_FIN, + I40IW_PKT_TYPE_RST +}; + +/* CM context params */ +struct i40iw_cm_tcp_context { + u8 client; + + u32 loc_seq_num; + u32 loc_ack_num; + u32 rem_ack_num; + u32 rcv_nxt; + + u32 loc_id; + u32 rem_id; + + u32 snd_wnd; + u32 max_snd_wnd; + + u32 rcv_wnd; + u32 mss; + u8 snd_wscale; + u8 rcv_wscale; + + struct timeval sent_ts; +}; + +enum i40iw_cm_listener_state { + I40IW_CM_LISTENER_PASSIVE_STATE = 1, + I40IW_CM_LISTENER_ACTIVE_STATE = 2, + I40IW_CM_LISTENER_EITHER_STATE = 3 +}; + +struct i40iw_cm_listener { + struct list_head list; + struct i40iw_cm_core *cm_core; + u8 loc_mac[ETH_ALEN]; + u32 loc_addr[4]; + u16 loc_port; + u32 map_loc_addr[4]; + u16 map_loc_port; + struct iw_cm_id *cm_id; + atomic_t ref_count; + struct i40iw_device *iwdev; + atomic_t pend_accepts_cnt; + int backlog; + enum i40iw_cm_listener_state listener_state; + u32 reused_node; + u8 user_pri; + u16 vlan_id; + bool qhash_set; + bool ipv4; + struct list_head child_listen_list; + +}; + +struct i40iw_kmem_info { + void *addr; + u32 size; +}; + +/* per connection node and node state information */ +struct i40iw_cm_node { + u32 loc_addr[4], rem_addr[4]; + u16 loc_port, rem_port; + u32 map_loc_addr[4], map_rem_addr[4]; + u16 map_loc_port, map_rem_port; + u16 vlan_id; + enum i40iw_cm_node_state state; + u8 loc_mac[ETH_ALEN]; + u8 rem_mac[ETH_ALEN]; + atomic_t ref_count; + struct i40iw_qp *iwqp; + struct i40iw_device *iwdev; + struct i40iw_sc_dev *dev; + struct i40iw_cm_tcp_context tcp_cntxt; + struct i40iw_cm_core *cm_core; + struct i40iw_cm_node *loopbackpartner; + struct i40iw_timer_entry *send_entry; + struct i40iw_timer_entry *close_entry; + spinlock_t retrans_list_lock; /* cm transmit packet */ + enum send_rdma0 send_rdma0_op; + u16 ird_size; + u16 ord_size; + u16 mpav2_ird_ord; + struct iw_cm_id *cm_id; + struct list_head list; + int accelerated; + struct i40iw_cm_listener *listener; + int apbvt_set; + int accept_pend; + struct list_head timer_entry; + struct list_head reset_entry; + atomic_t passive_state; + bool qhash_set; + u8 user_pri; + bool ipv4; + bool snd_mark_en; + u16 lsmm_size; + enum mpa_frame_version mpa_frame_rev; + struct i40iw_kmem_info pdata; + union { + struct ietf_mpa_v1 mpa_frame; + struct ietf_mpa_v2 mpa_v2_frame; + }; + + u8 pdata_buf[IETF_MAX_PRIV_DATA_LEN]; + struct i40iw_kmem_info mpa_hdr; +}; + +/* structure for client or CM to fill when making CM api calls. */ +/* - only need to set relevant data, based on op. */ +struct i40iw_cm_info { + struct iw_cm_id *cm_id; + u16 loc_port; + u16 rem_port; + u32 loc_addr[4]; + u32 rem_addr[4]; + u16 map_loc_port; + u16 map_rem_port; + u32 map_loc_addr[4]; + u32 map_rem_addr[4]; + u16 vlan_id; + int backlog; + u16 user_pri; + bool ipv4; +}; + +/* CM event codes */ +enum i40iw_cm_event_type { + I40IW_CM_EVENT_UNKNOWN, + I40IW_CM_EVENT_ESTABLISHED, + I40IW_CM_EVENT_MPA_REQ, + I40IW_CM_EVENT_MPA_CONNECT, + I40IW_CM_EVENT_MPA_ACCEPT, + I40IW_CM_EVENT_MPA_REJECT, + I40IW_CM_EVENT_MPA_ESTABLISHED, + I40IW_CM_EVENT_CONNECTED, + I40IW_CM_EVENT_RESET, + I40IW_CM_EVENT_ABORTED +}; + +/* event to post to CM event handler */ +struct i40iw_cm_event { + enum i40iw_cm_event_type type; + struct i40iw_cm_info cm_info; + struct work_struct event_work; + struct i40iw_cm_node *cm_node; +}; + +struct i40iw_cm_core { + struct i40iw_device *iwdev; + struct i40iw_sc_dev *dev; + + struct list_head listen_nodes; + struct list_head connected_nodes; + + struct timer_list tcp_timer; + + struct workqueue_struct *event_wq; + struct workqueue_struct *disconn_wq; + + spinlock_t ht_lock; /* manage hash table */ + spinlock_t listen_list_lock; /* listen list */ + + u64 stats_nodes_created; + u64 stats_nodes_destroyed; + u64 stats_listen_created; + u64 stats_listen_destroyed; + u64 stats_listen_nodes_created; + u64 stats_listen_nodes_destroyed; + u64 stats_loopbacks; + u64 stats_accepts; + u64 stats_rejects; + u64 stats_connect_errs; + u64 stats_passive_errs; + u64 stats_pkt_retrans; + u64 stats_backlog_drops; +}; + +int i40iw_schedule_cm_timer(struct i40iw_cm_node *cm_node, + struct i40iw_puda_buf *sqbuf, + enum i40iw_timer_type type, + int send_retrans, + int close_when_complete); + +int i40iw_accept(struct iw_cm_id *, struct iw_cm_conn_param *); +int i40iw_reject(struct iw_cm_id *, const void *, u8); +int i40iw_connect(struct iw_cm_id *, struct iw_cm_conn_param *); +int i40iw_create_listen(struct iw_cm_id *, int); +int i40iw_destroy_listen(struct iw_cm_id *); + +int i40iw_cm_start(struct i40iw_device *); +int i40iw_cm_stop(struct i40iw_device *); + +int i40iw_arp_table(struct i40iw_device *iwdev, + u32 *ip_addr, + bool ipv4, + u8 *mac_addr, + u32 action); + +#endif /* I40IW_CM_H */