--- /dev/null
+/*
+ * Copyright (c) 2009-2014 Chelsio, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/workqueue.h>
+#include <linux/skbuff.h>
+#include <linux/timer.h>
+#include <linux/notifier.h>
+#include <linux/inetdevice.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <linux/if_vlan.h>
+
+#include <net/neighbour.h>
+#include <net/netevent.h>
+#include <net/route.h>
+#include <net/tcp.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+
+#include <rdma/ib_addr.h>
+
+#include "iw_cxgb4.h"
+
+static char *states[] = {
+ "idle",
+ "listen",
+ "connecting",
+ "mpa_wait_req",
+ "mpa_req_sent",
+ "mpa_req_rcvd",
+ "mpa_rep_sent",
+ "fpdu_mode",
+ "aborting",
+ "closing",
+ "moribund",
+ "dead",
+ NULL,
+};
+
+static int nocong;
+module_param(nocong, int, 0644);
+MODULE_PARM_DESC(nocong, "Turn of congestion control (default=0)");
+
+static int enable_ecn;
+module_param(enable_ecn, int, 0644);
+MODULE_PARM_DESC(enable_ecn, "Enable ECN (default=0/disabled)");
+
+static int dack_mode = 1;
+module_param(dack_mode, int, 0644);
+MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)");
+
+uint c4iw_max_read_depth = 32;
+module_param(c4iw_max_read_depth, int, 0644);
+MODULE_PARM_DESC(c4iw_max_read_depth,
+ "Per-connection max ORD/IRD (default=32)");
+
+static int enable_tcp_timestamps;
+module_param(enable_tcp_timestamps, int, 0644);
+MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)");
+
+static int enable_tcp_sack;
+module_param(enable_tcp_sack, int, 0644);
+MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)");
+
+static int enable_tcp_window_scaling = 1;
+module_param(enable_tcp_window_scaling, int, 0644);
+MODULE_PARM_DESC(enable_tcp_window_scaling,
+ "Enable tcp window scaling (default=1)");
+
+int c4iw_debug;
+module_param(c4iw_debug, int, 0644);
+MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)");
+
+static int peer2peer = 1;
+module_param(peer2peer, int, 0644);
+MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=1)");
+
+static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ;
+module_param(p2p_type, int, 0644);
+MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: "
+ "1=RDMA_READ 0=RDMA_WRITE (default 1)");
+
+static int ep_timeout_secs = 60;
+module_param(ep_timeout_secs, int, 0644);
+MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout "
+ "in seconds (default=60)");
+
+static int mpa_rev = 1;
+module_param(mpa_rev, int, 0644);
+MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, "
+ "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft"
+ " compliant (default=1)");
+
+static int markers_enabled;
+module_param(markers_enabled, int, 0644);
+MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)");
+
+static int crc_enabled = 1;
+module_param(crc_enabled, int, 0644);
+MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)");
+
+static int rcv_win = 256 * 1024;
+module_param(rcv_win, int, 0644);
+MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)");
+
+static int snd_win = 128 * 1024;
+module_param(snd_win, int, 0644);
+MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)");
+
+static struct workqueue_struct *workq;
+
+static struct sk_buff_head rxq;
+
+static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp);
+static void ep_timeout(unsigned long arg);
+static void connect_reply_upcall(struct c4iw_ep *ep, int status);
+
+static LIST_HEAD(timeout_list);
+static spinlock_t timeout_lock;
+
+static void deref_qp(struct c4iw_ep *ep)
+{
+ c4iw_qp_rem_ref(&ep->com.qp->ibqp);
+ clear_bit(QP_REFERENCED, &ep->com.flags);
+}
+
+static void ref_qp(struct c4iw_ep *ep)
+{
+ set_bit(QP_REFERENCED, &ep->com.flags);
+ c4iw_qp_add_ref(&ep->com.qp->ibqp);
+}
+
+static void start_ep_timer(struct c4iw_ep *ep)
+{
+ PDBG("%s ep %p\n", __func__, ep);
+ if (timer_pending(&ep->timer)) {
+ pr_err("%s timer already started! ep %p\n",
+ __func__, ep);
+ return;
+ }
+ clear_bit(TIMEOUT, &ep->com.flags);
+ c4iw_get_ep(&ep->com);
+ ep->timer.expires = jiffies + ep_timeout_secs * HZ;
+ ep->timer.data = (unsigned long)ep;
+ ep->timer.function = ep_timeout;
+ add_timer(&ep->timer);
+}
+
+static int stop_ep_timer(struct c4iw_ep *ep)
+{
+ PDBG("%s ep %p stopping\n", __func__, ep);
+ del_timer_sync(&ep->timer);
+ if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
+ c4iw_put_ep(&ep->com);
+ return 0;
+ }
+ return 1;
+}
+
+static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb,
+ struct l2t_entry *l2e)
+{
+ int error = 0;
+
+ if (c4iw_fatal_error(rdev)) {
+ kfree_skb(skb);
+ PDBG("%s - device in error state - dropping\n", __func__);
+ return -EIO;
+ }
+ error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e);
+ if (error < 0)
+ kfree_skb(skb);
+ return error < 0 ? error : 0;
+}
+
+int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb)
+{
+ int error = 0;
+
+ if (c4iw_fatal_error(rdev)) {
+ kfree_skb(skb);
+ PDBG("%s - device in error state - dropping\n", __func__);
+ return -EIO;
+ }
+ error = cxgb4_ofld_send(rdev->lldi.ports[0], skb);
+ if (error < 0)
+ kfree_skb(skb);
+ return error < 0 ? error : 0;
+}
+
+static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb)
+{
+ struct cpl_tid_release *req;
+
+ skb = get_skb(skb, sizeof *req, GFP_KERNEL);
+ if (!skb)
+ return;
+ req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req));
+ INIT_TP_WR(req, hwtid);
+ OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid));
+ set_wr_txq(skb, CPL_PRIORITY_SETUP, 0);
+ c4iw_ofld_send(rdev, skb);
+ return;
+}
+
+static void set_emss(struct c4iw_ep *ep, u16 opt)
+{
+ ep->emss = ep->com.dev->rdev.lldi.mtus[TCPOPT_MSS_G(opt)] -
+ ((AF_INET == ep->com.remote_addr.ss_family) ?
+ sizeof(struct iphdr) : sizeof(struct ipv6hdr)) -
+ sizeof(struct tcphdr);
+ ep->mss = ep->emss;
+ if (TCPOPT_TSTAMP_G(opt))
+ ep->emss -= round_up(TCPOLEN_TIMESTAMP, 4);
+ if (ep->emss < 128)
+ ep->emss = 128;
+ if (ep->emss & 7)
+ PDBG("Warning: misaligned mtu idx %u mss %u emss=%u\n",
+ TCPOPT_MSS_G(opt), ep->mss, ep->emss);
+ PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt),
+ ep->mss, ep->emss);
+}
+
+static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc)
+{
+ enum c4iw_ep_state state;
+
+ mutex_lock(&epc->mutex);
+ state = epc->state;
+ mutex_unlock(&epc->mutex);
+ return state;
+}
+
+static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
+{
+ epc->state = new;
+}
+
+static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new)
+{
+ mutex_lock(&epc->mutex);
+ PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]);
+ __state_set(epc, new);
+ mutex_unlock(&epc->mutex);
+ return;
+}
+
+static void *alloc_ep(int size, gfp_t gfp)
+{
+ struct c4iw_ep_common *epc;
+
+ epc = kzalloc(size, gfp);
+ if (epc) {
+ kref_init(&epc->kref);
+ mutex_init(&epc->mutex);
+ c4iw_init_wr_wait(&epc->wr_wait);
+ }
+ PDBG("%s alloc ep %p\n", __func__, epc);
+ return epc;
+}
+
+void _c4iw_free_ep(struct kref *kref)
+{
+ struct c4iw_ep *ep;
+
+ ep = container_of(kref, struct c4iw_ep, com.kref);
+ PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]);
+ if (test_bit(QP_REFERENCED, &ep->com.flags))
+ deref_qp(ep);
+ if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) {
+ remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
+ cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
+ dst_release(ep->dst);
+ cxgb4_l2t_release(ep->l2t);
+ }
+ if (test_bit(RELEASE_MAPINFO, &ep->com.flags)) {
+ print_addr(&ep->com, __func__, "remove_mapinfo/mapping");
+ iwpm_remove_mapinfo(&ep->com.local_addr,
+ &ep->com.mapped_local_addr);
+ iwpm_remove_mapping(&ep->com.local_addr, RDMA_NL_C4IW);
+ }
+ kfree(ep);
+}
+
+static void release_ep_resources(struct c4iw_ep *ep)
+{
+ set_bit(RELEASE_RESOURCES, &ep->com.flags);
+ c4iw_put_ep(&ep->com);
+}
+
+static int status2errno(int status)
+{
+ switch (status) {
+ case CPL_ERR_NONE:
+ return 0;
+ case CPL_ERR_CONN_RESET:
+ return -ECONNRESET;
+ case CPL_ERR_ARP_MISS:
+ return -EHOSTUNREACH;
+ case CPL_ERR_CONN_TIMEDOUT:
+ return -ETIMEDOUT;
+ case CPL_ERR_TCAM_FULL:
+ return -ENOMEM;
+ case CPL_ERR_CONN_EXIST:
+ return -EADDRINUSE;
+ default:
+ return -EIO;
+ }
+}
+
+/*
+ * Try and reuse skbs already allocated...
+ */
+static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp)
+{
+ if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) {
+ skb_trim(skb, 0);
+ skb_get(skb);
+ skb_reset_transport_header(skb);
+ } else {
+ skb = alloc_skb(len, gfp);
+ }
+ t4_set_arp_err_handler(skb, NULL, NULL);
+ return skb;
+}
+
+static struct net_device *get_real_dev(struct net_device *egress_dev)
+{
+ return rdma_vlan_dev_real_dev(egress_dev) ? : egress_dev;
+}
+
+static int our_interface(struct c4iw_dev *dev, struct net_device *egress_dev)
+{
+ int i;
+
+ egress_dev = get_real_dev(egress_dev);
+ for (i = 0; i < dev->rdev.lldi.nports; i++)
+ if (dev->rdev.lldi.ports[i] == egress_dev)
+ return 1;
+ return 0;
+}
+
+static struct dst_entry *find_route6(struct c4iw_dev *dev, __u8 *local_ip,
+ __u8 *peer_ip, __be16 local_port,
+ __be16 peer_port, u8 tos,
+ __u32 sin6_scope_id)
+{
+ struct dst_entry *dst = NULL;
+
+ if (IS_ENABLED(CONFIG_IPV6)) {
+ struct flowi6 fl6;
+
+ memset(&fl6, 0, sizeof(fl6));
+ memcpy(&fl6.daddr, peer_ip, 16);
+ memcpy(&fl6.saddr, local_ip, 16);
+ if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
+ fl6.flowi6_oif = sin6_scope_id;
+ dst = ip6_route_output(&init_net, NULL, &fl6);
+ if (!dst)
+ goto out;
+ if (!our_interface(dev, ip6_dst_idev(dst)->dev) &&
+ !(ip6_dst_idev(dst)->dev->flags & IFF_LOOPBACK)) {
+ dst_release(dst);
+ dst = NULL;
+ }
+ }
+
+out:
+ return dst;
+}
+
+static struct dst_entry *find_route(struct c4iw_dev *dev, __be32 local_ip,
+ __be32 peer_ip, __be16 local_port,
+ __be16 peer_port, u8 tos)
+{
+ struct rtable *rt;
+ struct flowi4 fl4;
+ struct neighbour *n;
+
+ rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip,
+ peer_port, local_port, IPPROTO_TCP,
+ tos, 0);
+ if (IS_ERR(rt))
+ return NULL;
+ n = dst_neigh_lookup(&rt->dst, &peer_ip);
+ if (!n)
+ return NULL;
+ if (!our_interface(dev, n->dev) &&
+ !(n->dev->flags & IFF_LOOPBACK)) {
+ neigh_release(n);
+ dst_release(&rt->dst);
+ return NULL;
+ }
+ neigh_release(n);
+ return &rt->dst;
+}
+
+static void arp_failure_discard(void *handle, struct sk_buff *skb)
+{
+ PDBG("%s c4iw_dev %p\n", __func__, handle);
+ kfree_skb(skb);
+}
+
+/*
+ * Handle an ARP failure for an active open.
+ */
+static void act_open_req_arp_failure(void *handle, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep = handle;
+
+ printk(KERN_ERR MOD "ARP failure duing connect\n");
+ kfree_skb(skb);
+ connect_reply_upcall(ep, -EHOSTUNREACH);
+ state_set(&ep->com, DEAD);
+ remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
+ cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
+ dst_release(ep->dst);
+ cxgb4_l2t_release(ep->l2t);
+ c4iw_put_ep(&ep->com);
+}
+
+/*
+ * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant
+ * and send it along.
+ */
+static void abort_arp_failure(void *handle, struct sk_buff *skb)
+{
+ struct c4iw_rdev *rdev = handle;
+ struct cpl_abort_req *req = cplhdr(skb);
+
+ PDBG("%s rdev %p\n", __func__, rdev);
+ req->cmd = CPL_ABORT_NO_RST;
+ c4iw_ofld_send(rdev, skb);
+}
+
+static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb)
+{
+ unsigned int flowclen = 80;
+ struct fw_flowc_wr *flowc;
+ int i;
+
+ skb = get_skb(skb, flowclen, GFP_KERNEL);
+ flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen);
+
+ flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) |
+ FW_FLOWC_WR_NPARAMS_V(8));
+ flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(DIV_ROUND_UP(flowclen,
+ 16)) | FW_WR_FLOWID_V(ep->hwtid));
+
+ flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
+ flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V
+ (ep->com.dev->rdev.lldi.pf));
+ flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
+ flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan);
+ flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
+ flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan);
+ flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
+ flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid);
+ flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT;
+ flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq);
+ flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT;
+ flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq);
+ flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF;
+ flowc->mnemval[6].val = cpu_to_be32(ep->snd_win);
+ flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS;
+ flowc->mnemval[7].val = cpu_to_be32(ep->emss);
+ /* Pad WR to 16 byte boundary */
+ flowc->mnemval[8].mnemonic = 0;
+ flowc->mnemval[8].val = 0;
+ for (i = 0; i < 9; i++) {
+ flowc->mnemval[i].r4[0] = 0;
+ flowc->mnemval[i].r4[1] = 0;
+ flowc->mnemval[i].r4[2] = 0;
+ }
+
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+ c4iw_ofld_send(&ep->com.dev->rdev, skb);
+}
+
+static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp)
+{
+ struct cpl_close_con_req *req;
+ struct sk_buff *skb;
+ int wrlen = roundup(sizeof *req, 16);
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ skb = get_skb(NULL, wrlen, gfp);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__);
+ return -ENOMEM;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+ t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
+ req = (struct cpl_close_con_req *) skb_put(skb, wrlen);
+ memset(req, 0, wrlen);
+ INIT_TP_WR(req, ep->hwtid);
+ OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ,
+ ep->hwtid));
+ return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
+{
+ struct cpl_abort_req *req;
+ int wrlen = roundup(sizeof *req, 16);
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ skb = get_skb(skb, wrlen, gfp);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
+ __func__);
+ return -ENOMEM;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+ t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure);
+ req = (struct cpl_abort_req *) skb_put(skb, wrlen);
+ memset(req, 0, wrlen);
+ INIT_TP_WR(req, ep->hwtid);
+ OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid));
+ req->cmd = CPL_ABORT_SEND_RST;
+ return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+/*
+ * c4iw_form_pm_msg - Form a port mapper message with mapping info
+ */
+static void c4iw_form_pm_msg(struct c4iw_ep *ep,
+ struct iwpm_sa_data *pm_msg)
+{
+ memcpy(&pm_msg->loc_addr, &ep->com.local_addr,
+ sizeof(ep->com.local_addr));
+ memcpy(&pm_msg->rem_addr, &ep->com.remote_addr,
+ sizeof(ep->com.remote_addr));
+}
+
+/*
+ * c4iw_form_reg_msg - Form a port mapper message with dev info
+ */
+static void c4iw_form_reg_msg(struct c4iw_dev *dev,
+ struct iwpm_dev_data *pm_msg)
+{
+ memcpy(pm_msg->dev_name, dev->ibdev.name, IWPM_DEVNAME_SIZE);
+ memcpy(pm_msg->if_name, dev->rdev.lldi.ports[0]->name,
+ IWPM_IFNAME_SIZE);
+}
+
+static void c4iw_record_pm_msg(struct c4iw_ep *ep,
+ struct iwpm_sa_data *pm_msg)
+{
+ memcpy(&ep->com.mapped_local_addr, &pm_msg->mapped_loc_addr,
+ sizeof(ep->com.mapped_local_addr));
+ memcpy(&ep->com.mapped_remote_addr, &pm_msg->mapped_rem_addr,
+ sizeof(ep->com.mapped_remote_addr));
+}
+
+static int get_remote_addr(struct c4iw_ep *parent_ep, struct c4iw_ep *child_ep)
+{
+ int ret;
+
+ print_addr(&parent_ep->com, __func__, "get_remote_addr parent_ep ");
+ print_addr(&child_ep->com, __func__, "get_remote_addr child_ep ");
+
+ ret = iwpm_get_remote_info(&parent_ep->com.mapped_local_addr,
+ &child_ep->com.mapped_remote_addr,
+ &child_ep->com.remote_addr, RDMA_NL_C4IW);
+ if (ret)
+ PDBG("Unable to find remote peer addr info - err %d\n", ret);
+
+ return ret;
+}
+
+static void best_mtu(const unsigned short *mtus, unsigned short mtu,
+ unsigned int *idx, int use_ts, int ipv6)
+{
+ unsigned short hdr_size = (ipv6 ?
+ sizeof(struct ipv6hdr) :
+ sizeof(struct iphdr)) +
+ sizeof(struct tcphdr) +
+ (use_ts ?
+ round_up(TCPOLEN_TIMESTAMP, 4) : 0);
+ unsigned short data_size = mtu - hdr_size;
+
+ cxgb4_best_aligned_mtu(mtus, hdr_size, data_size, 8, idx);
+}
+
+static int send_connect(struct c4iw_ep *ep)
+{
+ struct cpl_act_open_req *req;
+ struct cpl_t5_act_open_req *t5_req;
+ struct cpl_act_open_req6 *req6;
+ struct cpl_t5_act_open_req6 *t5_req6;
+ struct sk_buff *skb;
+ u64 opt0;
+ u32 opt2;
+ unsigned int mtu_idx;
+ int wscale;
+ int wrlen;
+ int sizev4 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
+ sizeof(struct cpl_act_open_req) :
+ sizeof(struct cpl_t5_act_open_req);
+ int sizev6 = is_t4(ep->com.dev->rdev.lldi.adapter_type) ?
+ sizeof(struct cpl_act_open_req6) :
+ sizeof(struct cpl_t5_act_open_req6);
+ struct sockaddr_in *la = (struct sockaddr_in *)
+ &ep->com.mapped_local_addr;
+ struct sockaddr_in *ra = (struct sockaddr_in *)
+ &ep->com.mapped_remote_addr;
+ struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)
+ &ep->com.mapped_local_addr;
+ struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)
+ &ep->com.mapped_remote_addr;
+ int win;
+
+ wrlen = (ep->com.remote_addr.ss_family == AF_INET) ?
+ roundup(sizev4, 16) :
+ roundup(sizev6, 16);
+
+ PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid);
+
+ skb = get_skb(NULL, wrlen, GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - failed to alloc skb.\n",
+ __func__);
+ return -ENOMEM;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
+
+ best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
+ enable_tcp_timestamps,
+ (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
+ wscale = compute_wscale(rcv_win);
+
+ /*
+ * Specify the largest window that will fit in opt0. The
+ * remainder will be specified in the rx_data_ack.
+ */
+ win = ep->rcv_win >> 10;
+ if (win > RCV_BUFSIZ_M)
+ win = RCV_BUFSIZ_M;
+
+ opt0 = (nocong ? NO_CONG_F : 0) |
+ KEEP_ALIVE_F |
+ DELACK_F |
+ WND_SCALE_V(wscale) |
+ MSS_IDX_V(mtu_idx) |
+ L2T_IDX_V(ep->l2t->idx) |
+ TX_CHAN_V(ep->tx_chan) |
+ SMAC_SEL_V(ep->smac_idx) |
+ DSCP_V(ep->tos) |
+ ULP_MODE_V(ULP_MODE_TCPDDP) |
+ RCV_BUFSIZ_V(win);
+ opt2 = RX_CHANNEL_V(0) |
+ CCTRL_ECN_V(enable_ecn) |
+ RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
+ if (enable_tcp_timestamps)
+ opt2 |= TSTAMPS_EN_F;
+ if (enable_tcp_sack)
+ opt2 |= SACK_EN_F;
+ if (wscale && enable_tcp_window_scaling)
+ opt2 |= WND_SCALE_EN_F;
+ if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
+ opt2 |= T5_OPT_2_VALID_F;
+ opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
+ opt2 |= T5_ISS_F;
+ }
+ t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure);
+
+ if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) {
+ if (ep->com.remote_addr.ss_family == AF_INET) {
+ req = (struct cpl_act_open_req *) skb_put(skb, wrlen);
+ INIT_TP_WR(req, 0);
+ OPCODE_TID(req) = cpu_to_be32(
+ MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
+ ((ep->rss_qid << 14) | ep->atid)));
+ req->local_port = la->sin_port;
+ req->peer_port = ra->sin_port;
+ req->local_ip = la->sin_addr.s_addr;
+ req->peer_ip = ra->sin_addr.s_addr;
+ req->opt0 = cpu_to_be64(opt0);
+ req->params = cpu_to_be32(cxgb4_select_ntuple(
+ ep->com.dev->rdev.lldi.ports[0],
+ ep->l2t));
+ req->opt2 = cpu_to_be32(opt2);
+ } else {
+ req6 = (struct cpl_act_open_req6 *)skb_put(skb, wrlen);
+
+ INIT_TP_WR(req6, 0);
+ OPCODE_TID(req6) = cpu_to_be32(
+ MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
+ ((ep->rss_qid<<14)|ep->atid)));
+ req6->local_port = la6->sin6_port;
+ req6->peer_port = ra6->sin6_port;
+ req6->local_ip_hi = *((__be64 *)
+ (la6->sin6_addr.s6_addr));
+ req6->local_ip_lo = *((__be64 *)
+ (la6->sin6_addr.s6_addr + 8));
+ req6->peer_ip_hi = *((__be64 *)
+ (ra6->sin6_addr.s6_addr));
+ req6->peer_ip_lo = *((__be64 *)
+ (ra6->sin6_addr.s6_addr + 8));
+ req6->opt0 = cpu_to_be64(opt0);
+ req6->params = cpu_to_be32(cxgb4_select_ntuple(
+ ep->com.dev->rdev.lldi.ports[0],
+ ep->l2t));
+ req6->opt2 = cpu_to_be32(opt2);
+ }
+ } else {
+ u32 isn = (prandom_u32() & ~7UL) - 1;
+
+ if (peer2peer)
+ isn += 4;
+
+ if (ep->com.remote_addr.ss_family == AF_INET) {
+ t5_req = (struct cpl_t5_act_open_req *)
+ skb_put(skb, wrlen);
+ INIT_TP_WR(t5_req, 0);
+ OPCODE_TID(t5_req) = cpu_to_be32(
+ MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
+ ((ep->rss_qid << 14) | ep->atid)));
+ t5_req->local_port = la->sin_port;
+ t5_req->peer_port = ra->sin_port;
+ t5_req->local_ip = la->sin_addr.s_addr;
+ t5_req->peer_ip = ra->sin_addr.s_addr;
+ t5_req->opt0 = cpu_to_be64(opt0);
+ t5_req->params = cpu_to_be64(FILTER_TUPLE_V(
+ cxgb4_select_ntuple(
+ ep->com.dev->rdev.lldi.ports[0],
+ ep->l2t)));
+ t5_req->rsvd = cpu_to_be32(isn);
+ PDBG("%s snd_isn %u\n", __func__,
+ be32_to_cpu(t5_req->rsvd));
+ t5_req->opt2 = cpu_to_be32(opt2);
+ } else {
+ t5_req6 = (struct cpl_t5_act_open_req6 *)
+ skb_put(skb, wrlen);
+ INIT_TP_WR(t5_req6, 0);
+ OPCODE_TID(t5_req6) = cpu_to_be32(
+ MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
+ ((ep->rss_qid<<14)|ep->atid)));
+ t5_req6->local_port = la6->sin6_port;
+ t5_req6->peer_port = ra6->sin6_port;
+ t5_req6->local_ip_hi = *((__be64 *)
+ (la6->sin6_addr.s6_addr));
+ t5_req6->local_ip_lo = *((__be64 *)
+ (la6->sin6_addr.s6_addr + 8));
+ t5_req6->peer_ip_hi = *((__be64 *)
+ (ra6->sin6_addr.s6_addr));
+ t5_req6->peer_ip_lo = *((__be64 *)
+ (ra6->sin6_addr.s6_addr + 8));
+ t5_req6->opt0 = cpu_to_be64(opt0);
+ t5_req6->params = cpu_to_be64(FILTER_TUPLE_V(
+ cxgb4_select_ntuple(
+ ep->com.dev->rdev.lldi.ports[0],
+ ep->l2t)));
+ t5_req6->rsvd = cpu_to_be32(isn);
+ PDBG("%s snd_isn %u\n", __func__,
+ be32_to_cpu(t5_req6->rsvd));
+ t5_req6->opt2 = cpu_to_be32(opt2);
+ }
+ }
+
+ set_bit(ACT_OPEN_REQ, &ep->com.history);
+ return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb,
+ u8 mpa_rev_to_use)
+{
+ int mpalen, wrlen;
+ struct fw_ofld_tx_data_wr *req;
+ struct mpa_message *mpa;
+ struct mpa_v2_conn_params mpa_v2_params;
+
+ PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
+
+ BUG_ON(skb_cloned(skb));
+
+ mpalen = sizeof(*mpa) + ep->plen;
+ if (mpa_rev_to_use == 2)
+ mpalen += sizeof(struct mpa_v2_conn_params);
+ wrlen = roundup(mpalen + sizeof *req, 16);
+ skb = get_skb(skb, wrlen, GFP_KERNEL);
+ if (!skb) {
+ connect_reply_upcall(ep, -ENOMEM);
+ return;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+
+ req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
+ memset(req, 0, wrlen);
+ req->op_to_immdlen = cpu_to_be32(
+ FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
+ FW_WR_COMPL_F |
+ FW_WR_IMMDLEN_V(mpalen));
+ req->flowid_len16 = cpu_to_be32(
+ FW_WR_FLOWID_V(ep->hwtid) |
+ FW_WR_LEN16_V(wrlen >> 4));
+ req->plen = cpu_to_be32(mpalen);
+ req->tunnel_to_proxy = cpu_to_be32(
+ FW_OFLD_TX_DATA_WR_FLUSH_F |
+ FW_OFLD_TX_DATA_WR_SHOVE_F);
+
+ mpa = (struct mpa_message *)(req + 1);
+ memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key));
+ mpa->flags = (crc_enabled ? MPA_CRC : 0) |
+ (markers_enabled ? MPA_MARKERS : 0) |
+ (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0);
+ mpa->private_data_size = htons(ep->plen);
+ mpa->revision = mpa_rev_to_use;
+ if (mpa_rev_to_use == 1) {
+ ep->tried_with_mpa_v1 = 1;
+ ep->retry_with_mpa_v1 = 0;
+ }
+
+ if (mpa_rev_to_use == 2) {
+ mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
+ sizeof (struct mpa_v2_conn_params));
+ PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
+ ep->ord);
+ mpa_v2_params.ird = htons((u16)ep->ird);
+ mpa_v2_params.ord = htons((u16)ep->ord);
+
+ if (peer2peer) {
+ mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
+ if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
+ mpa_v2_params.ord |=
+ htons(MPA_V2_RDMA_WRITE_RTR);
+ else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
+ mpa_v2_params.ord |=
+ htons(MPA_V2_RDMA_READ_RTR);
+ }
+ memcpy(mpa->private_data, &mpa_v2_params,
+ sizeof(struct mpa_v2_conn_params));
+
+ if (ep->plen)
+ memcpy(mpa->private_data +
+ sizeof(struct mpa_v2_conn_params),
+ ep->mpa_pkt + sizeof(*mpa), ep->plen);
+ } else
+ if (ep->plen)
+ memcpy(mpa->private_data,
+ ep->mpa_pkt + sizeof(*mpa), ep->plen);
+
+ /*
+ * Reference the mpa skb. This ensures the data area
+ * will remain in memory until the hw acks the tx.
+ * Function fw4_ack() will deref it.
+ */
+ skb_get(skb);
+ t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
+ BUG_ON(ep->mpa_skb);
+ ep->mpa_skb = skb;
+ c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+ start_ep_timer(ep);
+ __state_set(&ep->com, MPA_REQ_SENT);
+ ep->mpa_attr.initiator = 1;
+ ep->snd_seq += mpalen;
+ return;
+}
+
+static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen)
+{
+ int mpalen, wrlen;
+ struct fw_ofld_tx_data_wr *req;
+ struct mpa_message *mpa;
+ struct sk_buff *skb;
+ struct mpa_v2_conn_params mpa_v2_params;
+
+ PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
+
+ mpalen = sizeof(*mpa) + plen;
+ if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
+ mpalen += sizeof(struct mpa_v2_conn_params);
+ wrlen = roundup(mpalen + sizeof *req, 16);
+
+ skb = get_skb(NULL, wrlen, GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
+ return -ENOMEM;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+
+ req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen);
+ memset(req, 0, wrlen);
+ req->op_to_immdlen = cpu_to_be32(
+ FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
+ FW_WR_COMPL_F |
+ FW_WR_IMMDLEN_V(mpalen));
+ req->flowid_len16 = cpu_to_be32(
+ FW_WR_FLOWID_V(ep->hwtid) |
+ FW_WR_LEN16_V(wrlen >> 4));
+ req->plen = cpu_to_be32(mpalen);
+ req->tunnel_to_proxy = cpu_to_be32(
+ FW_OFLD_TX_DATA_WR_FLUSH_F |
+ FW_OFLD_TX_DATA_WR_SHOVE_F);
+
+ mpa = (struct mpa_message *)(req + 1);
+ memset(mpa, 0, sizeof(*mpa));
+ memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
+ mpa->flags = MPA_REJECT;
+ mpa->revision = ep->mpa_attr.version;
+ mpa->private_data_size = htons(plen);
+
+ if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
+ mpa->flags |= MPA_ENHANCED_RDMA_CONN;
+ mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
+ sizeof (struct mpa_v2_conn_params));
+ mpa_v2_params.ird = htons(((u16)ep->ird) |
+ (peer2peer ? MPA_V2_PEER2PEER_MODEL :
+ 0));
+ mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ?
+ (p2p_type ==
+ FW_RI_INIT_P2PTYPE_RDMA_WRITE ?
+ MPA_V2_RDMA_WRITE_RTR : p2p_type ==
+ FW_RI_INIT_P2PTYPE_READ_REQ ?
+ MPA_V2_RDMA_READ_RTR : 0) : 0));
+ memcpy(mpa->private_data, &mpa_v2_params,
+ sizeof(struct mpa_v2_conn_params));
+
+ if (ep->plen)
+ memcpy(mpa->private_data +
+ sizeof(struct mpa_v2_conn_params), pdata, plen);
+ } else
+ if (plen)
+ memcpy(mpa->private_data, pdata, plen);
+
+ /*
+ * Reference the mpa skb again. This ensures the data area
+ * will remain in memory until the hw acks the tx.
+ * Function fw4_ack() will deref it.
+ */
+ skb_get(skb);
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+ t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
+ BUG_ON(ep->mpa_skb);
+ ep->mpa_skb = skb;
+ ep->snd_seq += mpalen;
+ return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen)
+{
+ int mpalen, wrlen;
+ struct fw_ofld_tx_data_wr *req;
+ struct mpa_message *mpa;
+ struct sk_buff *skb;
+ struct mpa_v2_conn_params mpa_v2_params;
+
+ PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen);
+
+ mpalen = sizeof(*mpa) + plen;
+ if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn)
+ mpalen += sizeof(struct mpa_v2_conn_params);
+ wrlen = roundup(mpalen + sizeof *req, 16);
+
+ skb = get_skb(NULL, wrlen, GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__);
+ return -ENOMEM;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+
+ req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen);
+ memset(req, 0, wrlen);
+ req->op_to_immdlen = cpu_to_be32(
+ FW_WR_OP_V(FW_OFLD_TX_DATA_WR) |
+ FW_WR_COMPL_F |
+ FW_WR_IMMDLEN_V(mpalen));
+ req->flowid_len16 = cpu_to_be32(
+ FW_WR_FLOWID_V(ep->hwtid) |
+ FW_WR_LEN16_V(wrlen >> 4));
+ req->plen = cpu_to_be32(mpalen);
+ req->tunnel_to_proxy = cpu_to_be32(
+ FW_OFLD_TX_DATA_WR_FLUSH_F |
+ FW_OFLD_TX_DATA_WR_SHOVE_F);
+
+ mpa = (struct mpa_message *)(req + 1);
+ memset(mpa, 0, sizeof(*mpa));
+ memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key));
+ mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) |
+ (markers_enabled ? MPA_MARKERS : 0);
+ mpa->revision = ep->mpa_attr.version;
+ mpa->private_data_size = htons(plen);
+
+ if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
+ mpa->flags |= MPA_ENHANCED_RDMA_CONN;
+ mpa->private_data_size = htons(ntohs(mpa->private_data_size) +
+ sizeof (struct mpa_v2_conn_params));
+ mpa_v2_params.ird = htons((u16)ep->ird);
+ mpa_v2_params.ord = htons((u16)ep->ord);
+ if (peer2peer && (ep->mpa_attr.p2p_type !=
+ FW_RI_INIT_P2PTYPE_DISABLED)) {
+ mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL);
+
+ if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE)
+ mpa_v2_params.ord |=
+ htons(MPA_V2_RDMA_WRITE_RTR);
+ else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ)
+ mpa_v2_params.ord |=
+ htons(MPA_V2_RDMA_READ_RTR);
+ }
+
+ memcpy(mpa->private_data, &mpa_v2_params,
+ sizeof(struct mpa_v2_conn_params));
+
+ if (ep->plen)
+ memcpy(mpa->private_data +
+ sizeof(struct mpa_v2_conn_params), pdata, plen);
+ } else
+ if (plen)
+ memcpy(mpa->private_data, pdata, plen);
+
+ /*
+ * Reference the mpa skb. This ensures the data area
+ * will remain in memory until the hw acks the tx.
+ * Function fw4_ack() will deref it.
+ */
+ skb_get(skb);
+ t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
+ ep->mpa_skb = skb;
+ __state_set(&ep->com, MPA_REP_SENT);
+ ep->snd_seq += mpalen;
+ return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_act_establish *req = cplhdr(skb);
+ unsigned int tid = GET_TID(req);
+ unsigned int atid = TID_TID_G(ntohl(req->tos_atid));
+ struct tid_info *t = dev->rdev.lldi.tids;
+
+ ep = lookup_atid(t, atid);
+
+ PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid,
+ be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn));
+
+ mutex_lock(&ep->com.mutex);
+ dst_confirm(ep->dst);
+
+ /* setup the hwtid for this connection */
+ ep->hwtid = tid;
+ cxgb4_insert_tid(t, ep, tid);
+ insert_handle(dev, &dev->hwtid_idr, ep, ep->hwtid);
+
+ ep->snd_seq = be32_to_cpu(req->snd_isn);
+ ep->rcv_seq = be32_to_cpu(req->rcv_isn);
+
+ set_emss(ep, ntohs(req->tcp_opt));
+
+ /* dealloc the atid */
+ remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
+ cxgb4_free_atid(t, atid);
+ set_bit(ACT_ESTAB, &ep->com.history);
+
+ /* start MPA negotiation */
+ send_flowc(ep, NULL);
+ if (ep->retry_with_mpa_v1)
+ send_mpa_req(ep, skb, 1);
+ else
+ send_mpa_req(ep, skb, mpa_rev);
+ mutex_unlock(&ep->com.mutex);
+ return 0;
+}
+
+static void close_complete_upcall(struct c4iw_ep *ep, int status)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_CLOSE;
+ event.status = status;
+ if (ep->com.cm_id) {
+ PDBG("close complete delivered ep %p cm_id %p tid %u\n",
+ ep, ep->com.cm_id, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ ep->com.cm_id->rem_ref(ep->com.cm_id);
+ ep->com.cm_id = NULL;
+ set_bit(CLOSE_UPCALL, &ep->com.history);
+ }
+}
+
+static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp)
+{
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ __state_set(&ep->com, ABORTING);
+ set_bit(ABORT_CONN, &ep->com.history);
+ return send_abort(ep, skb, gfp);
+}
+
+static void peer_close_upcall(struct c4iw_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_DISCONNECT;
+ if (ep->com.cm_id) {
+ PDBG("peer close delivered ep %p cm_id %p tid %u\n",
+ ep, ep->com.cm_id, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ set_bit(DISCONN_UPCALL, &ep->com.history);
+ }
+}
+
+static void peer_abort_upcall(struct c4iw_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_CLOSE;
+ event.status = -ECONNRESET;
+ if (ep->com.cm_id) {
+ PDBG("abort delivered ep %p cm_id %p tid %u\n", ep,
+ ep->com.cm_id, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ ep->com.cm_id->rem_ref(ep->com.cm_id);
+ ep->com.cm_id = NULL;
+ set_bit(ABORT_UPCALL, &ep->com.history);
+ }
+}
+
+static void connect_reply_upcall(struct c4iw_ep *ep, int status)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_CONNECT_REPLY;
+ event.status = status;
+ memcpy(&event.local_addr, &ep->com.local_addr,
+ sizeof(ep->com.local_addr));
+ memcpy(&event.remote_addr, &ep->com.remote_addr,
+ sizeof(ep->com.remote_addr));
+
+ if ((status == 0) || (status == -ECONNREFUSED)) {
+ if (!ep->tried_with_mpa_v1) {
+ /* this means MPA_v2 is used */
+ event.private_data_len = ep->plen -
+ sizeof(struct mpa_v2_conn_params);
+ event.private_data = ep->mpa_pkt +
+ sizeof(struct mpa_message) +
+ sizeof(struct mpa_v2_conn_params);
+ } else {
+ /* this means MPA_v1 is used */
+ event.private_data_len = ep->plen;
+ event.private_data = ep->mpa_pkt +
+ sizeof(struct mpa_message);
+ }
+ }
+
+ PDBG("%s ep %p tid %u status %d\n", __func__, ep,
+ ep->hwtid, status);
+ set_bit(CONN_RPL_UPCALL, &ep->com.history);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+
+ if (status < 0) {
+ ep->com.cm_id->rem_ref(ep->com.cm_id);
+ ep->com.cm_id = NULL;
+ }
+}
+
+static int connect_request_upcall(struct c4iw_ep *ep)
+{
+ struct iw_cm_event event;
+ int ret;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_CONNECT_REQUEST;
+ memcpy(&event.local_addr, &ep->com.local_addr,
+ sizeof(ep->com.local_addr));
+ memcpy(&event.remote_addr, &ep->com.remote_addr,
+ sizeof(ep->com.remote_addr));
+ event.provider_data = ep;
+ if (!ep->tried_with_mpa_v1) {
+ /* this means MPA_v2 is used */
+ event.ord = ep->ord;
+ event.ird = ep->ird;
+ event.private_data_len = ep->plen -
+ sizeof(struct mpa_v2_conn_params);
+ event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) +
+ sizeof(struct mpa_v2_conn_params);
+ } else {
+ /* this means MPA_v1 is used. Send max supported */
+ event.ord = cur_max_read_depth(ep->com.dev);
+ event.ird = cur_max_read_depth(ep->com.dev);
+ event.private_data_len = ep->plen;
+ event.private_data = ep->mpa_pkt + sizeof(struct mpa_message);
+ }
+ c4iw_get_ep(&ep->com);
+ ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id,
+ &event);
+ if (ret)
+ c4iw_put_ep(&ep->com);
+ set_bit(CONNREQ_UPCALL, &ep->com.history);
+ c4iw_put_ep(&ep->parent_ep->com);
+ return ret;
+}
+
+static void established_upcall(struct c4iw_ep *ep)
+{
+ struct iw_cm_event event;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ memset(&event, 0, sizeof(event));
+ event.event = IW_CM_EVENT_ESTABLISHED;
+ event.ird = ep->ird;
+ event.ord = ep->ord;
+ if (ep->com.cm_id) {
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ ep->com.cm_id->event_handler(ep->com.cm_id, &event);
+ set_bit(ESTAB_UPCALL, &ep->com.history);
+ }
+}
+
+static int update_rx_credits(struct c4iw_ep *ep, u32 credits)
+{
+ struct cpl_rx_data_ack *req;
+ struct sk_buff *skb;
+ int wrlen = roundup(sizeof *req, 16);
+
+ PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
+ skb = get_skb(NULL, wrlen, GFP_KERNEL);
+ if (!skb) {
+ printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n");
+ return 0;
+ }
+
+ /*
+ * If we couldn't specify the entire rcv window at connection setup
+ * due to the limit in the number of bits in the RCV_BUFSIZ field,
+ * then add the overage in to the credits returned.
+ */
+ if (ep->rcv_win > RCV_BUFSIZ_M * 1024)
+ credits += ep->rcv_win - RCV_BUFSIZ_M * 1024;
+
+ req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen);
+ memset(req, 0, wrlen);
+ INIT_TP_WR(req, ep->hwtid);
+ OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK,
+ ep->hwtid));
+ req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK_F |
+ RX_DACK_CHANGE_F |
+ RX_DACK_MODE_V(dack_mode));
+ set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx);
+ c4iw_ofld_send(&ep->com.dev->rdev, skb);
+ return credits;
+}
+
+#define RELAXED_IRD_NEGOTIATION 1
+
+static int process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb)
+{
+ struct mpa_message *mpa;
+ struct mpa_v2_conn_params *mpa_v2_params;
+ u16 plen;
+ u16 resp_ird, resp_ord;
+ u8 rtr_mismatch = 0, insuff_ird = 0;
+ struct c4iw_qp_attributes attrs;
+ enum c4iw_qp_attr_mask mask;
+ int err;
+ int disconnect = 0;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+
+ /*
+ * Stop mpa timer. If it expired, then
+ * we ignore the MPA reply. process_timeout()
+ * will abort the connection.
+ */
+ if (stop_ep_timer(ep))
+ return 0;
+
+ /*
+ * If we get more than the supported amount of private data
+ * then we must fail this connection.
+ */
+ if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
+ err = -EINVAL;
+ goto err;
+ }
+
+ /*
+ * copy the new data into our accumulation buffer.
+ */
+ skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
+ skb->len);
+ ep->mpa_pkt_len += skb->len;
+
+ /*
+ * if we don't even have the mpa message, then bail.
+ */
+ if (ep->mpa_pkt_len < sizeof(*mpa))
+ return 0;
+ mpa = (struct mpa_message *) ep->mpa_pkt;
+
+ /* Validate MPA header. */
+ if (mpa->revision > mpa_rev) {
+ printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
+ " Received = %d\n", __func__, mpa_rev, mpa->revision);
+ err = -EPROTO;
+ goto err;
+ }
+ if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) {
+ err = -EPROTO;
+ goto err;
+ }
+
+ plen = ntohs(mpa->private_data_size);
+
+ /*
+ * Fail if there's too much private data.
+ */
+ if (plen > MPA_MAX_PRIVATE_DATA) {
+ err = -EPROTO;
+ goto err;
+ }
+
+ /*
+ * If plen does not account for pkt size
+ */
+ if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
+ err = -EPROTO;
+ goto err;
+ }
+
+ ep->plen = (u8) plen;
+
+ /*
+ * If we don't have all the pdata yet, then bail.
+ * We'll continue process when more data arrives.
+ */
+ if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
+ return 0;
+
+ if (mpa->flags & MPA_REJECT) {
+ err = -ECONNREFUSED;
+ goto err;
+ }
+
+ /*
+ * If we get here we have accumulated the entire mpa
+ * start reply message including private data. And
+ * the MPA header is valid.
+ */
+ __state_set(&ep->com, FPDU_MODE);
+ ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
+ ep->mpa_attr.recv_marker_enabled = markers_enabled;
+ ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
+ ep->mpa_attr.version = mpa->revision;
+ ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
+
+ if (mpa->revision == 2) {
+ ep->mpa_attr.enhanced_rdma_conn =
+ mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
+ if (ep->mpa_attr.enhanced_rdma_conn) {
+ mpa_v2_params = (struct mpa_v2_conn_params *)
+ (ep->mpa_pkt + sizeof(*mpa));
+ resp_ird = ntohs(mpa_v2_params->ird) &
+ MPA_V2_IRD_ORD_MASK;
+ resp_ord = ntohs(mpa_v2_params->ord) &
+ MPA_V2_IRD_ORD_MASK;
+ PDBG("%s responder ird %u ord %u ep ird %u ord %u\n",
+ __func__, resp_ird, resp_ord, ep->ird, ep->ord);
+
+ /*
+ * This is a double-check. Ideally, below checks are
+ * not required since ird/ord stuff has been taken
+ * care of in c4iw_accept_cr
+ */
+ if (ep->ird < resp_ord) {
+ if (RELAXED_IRD_NEGOTIATION && resp_ord <=
+ ep->com.dev->rdev.lldi.max_ordird_qp)
+ ep->ird = resp_ord;
+ else
+ insuff_ird = 1;
+ } else if (ep->ird > resp_ord) {
+ ep->ird = resp_ord;
+ }
+ if (ep->ord > resp_ird) {
+ if (RELAXED_IRD_NEGOTIATION)
+ ep->ord = resp_ird;
+ else
+ insuff_ird = 1;
+ }
+ if (insuff_ird) {
+ err = -ENOMEM;
+ ep->ird = resp_ord;
+ ep->ord = resp_ird;
+ }
+
+ if (ntohs(mpa_v2_params->ird) &
+ MPA_V2_PEER2PEER_MODEL) {
+ if (ntohs(mpa_v2_params->ord) &
+ MPA_V2_RDMA_WRITE_RTR)
+ ep->mpa_attr.p2p_type =
+ FW_RI_INIT_P2PTYPE_RDMA_WRITE;
+ else if (ntohs(mpa_v2_params->ord) &
+ MPA_V2_RDMA_READ_RTR)
+ ep->mpa_attr.p2p_type =
+ FW_RI_INIT_P2PTYPE_READ_REQ;
+ }
+ }
+ } else if (mpa->revision == 1)
+ if (peer2peer)
+ ep->mpa_attr.p2p_type = p2p_type;
+
+ PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
+ "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = "
+ "%d\n", __func__, ep->mpa_attr.crc_enabled,
+ ep->mpa_attr.recv_marker_enabled,
+ ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
+ ep->mpa_attr.p2p_type, p2p_type);
+
+ /*
+ * If responder's RTR does not match with that of initiator, assign
+ * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not
+ * generated when moving QP to RTS state.
+ * A TERM message will be sent after QP has moved to RTS state
+ */
+ if ((ep->mpa_attr.version == 2) && peer2peer &&
+ (ep->mpa_attr.p2p_type != p2p_type)) {
+ ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
+ rtr_mismatch = 1;
+ }
+
+ attrs.mpa_attr = ep->mpa_attr;
+ attrs.max_ird = ep->ird;
+ attrs.max_ord = ep->ord;
+ attrs.llp_stream_handle = ep;
+ attrs.next_state = C4IW_QP_STATE_RTS;
+
+ mask = C4IW_QP_ATTR_NEXT_STATE |
+ C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR |
+ C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD;
+
+ /* bind QP and TID with INIT_WR */
+ err = c4iw_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, mask, &attrs, 1);
+ if (err)
+ goto err;
+
+ /*
+ * If responder's RTR requirement did not match with what initiator
+ * supports, generate TERM message
+ */
+ if (rtr_mismatch) {
+ printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__);
+ attrs.layer_etype = LAYER_MPA | DDP_LLP;
+ attrs.ecode = MPA_NOMATCH_RTR;
+ attrs.next_state = C4IW_QP_STATE_TERMINATE;
+ attrs.send_term = 1;
+ err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+ C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+ err = -ENOMEM;
+ disconnect = 1;
+ goto out;
+ }
+
+ /*
+ * Generate TERM if initiator IRD is not sufficient for responder
+ * provided ORD. Currently, we do the same behaviour even when
+ * responder provided IRD is also not sufficient as regards to
+ * initiator ORD.
+ */
+ if (insuff_ird) {
+ printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n",
+ __func__);
+ attrs.layer_etype = LAYER_MPA | DDP_LLP;
+ attrs.ecode = MPA_INSUFF_IRD;
+ attrs.next_state = C4IW_QP_STATE_TERMINATE;
+ attrs.send_term = 1;
+ err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+ C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+ err = -ENOMEM;
+ disconnect = 1;
+ goto out;
+ }
+ goto out;
+err:
+ __state_set(&ep->com, ABORTING);
+ send_abort(ep, skb, GFP_KERNEL);
+out:
+ connect_reply_upcall(ep, err);
+ return disconnect;
+}
+
+static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb)
+{
+ struct mpa_message *mpa;
+ struct mpa_v2_conn_params *mpa_v2_params;
+ u16 plen;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+
+ /*
+ * If we get more than the supported amount of private data
+ * then we must fail this connection.
+ */
+ if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) {
+ (void)stop_ep_timer(ep);
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
+
+ /*
+ * Copy the new data into our accumulation buffer.
+ */
+ skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]),
+ skb->len);
+ ep->mpa_pkt_len += skb->len;
+
+ /*
+ * If we don't even have the mpa message, then bail.
+ * We'll continue process when more data arrives.
+ */
+ if (ep->mpa_pkt_len < sizeof(*mpa))
+ return;
+
+ PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__);
+ mpa = (struct mpa_message *) ep->mpa_pkt;
+
+ /*
+ * Validate MPA Header.
+ */
+ if (mpa->revision > mpa_rev) {
+ printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d,"
+ " Received = %d\n", __func__, mpa_rev, mpa->revision);
+ (void)stop_ep_timer(ep);
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) {
+ (void)stop_ep_timer(ep);
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ plen = ntohs(mpa->private_data_size);
+
+ /*
+ * Fail if there's too much private data.
+ */
+ if (plen > MPA_MAX_PRIVATE_DATA) {
+ (void)stop_ep_timer(ep);
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+
+ /*
+ * If plen does not account for pkt size
+ */
+ if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) {
+ (void)stop_ep_timer(ep);
+ abort_connection(ep, skb, GFP_KERNEL);
+ return;
+ }
+ ep->plen = (u8) plen;
+
+ /*
+ * If we don't have all the pdata yet, then bail.
+ */
+ if (ep->mpa_pkt_len < (sizeof(*mpa) + plen))
+ return;
+
+ /*
+ * If we get here we have accumulated the entire mpa
+ * start reply message including private data.
+ */
+ ep->mpa_attr.initiator = 0;
+ ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0;
+ ep->mpa_attr.recv_marker_enabled = markers_enabled;
+ ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0;
+ ep->mpa_attr.version = mpa->revision;
+ if (mpa->revision == 1)
+ ep->tried_with_mpa_v1 = 1;
+ ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED;
+
+ if (mpa->revision == 2) {
+ ep->mpa_attr.enhanced_rdma_conn =
+ mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0;
+ if (ep->mpa_attr.enhanced_rdma_conn) {
+ mpa_v2_params = (struct mpa_v2_conn_params *)
+ (ep->mpa_pkt + sizeof(*mpa));
+ ep->ird = ntohs(mpa_v2_params->ird) &
+ MPA_V2_IRD_ORD_MASK;
+ ep->ord = ntohs(mpa_v2_params->ord) &
+ MPA_V2_IRD_ORD_MASK;
+ PDBG("%s initiator ird %u ord %u\n", __func__, ep->ird,
+ ep->ord);
+ if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL)
+ if (peer2peer) {
+ if (ntohs(mpa_v2_params->ord) &
+ MPA_V2_RDMA_WRITE_RTR)
+ ep->mpa_attr.p2p_type =
+ FW_RI_INIT_P2PTYPE_RDMA_WRITE;
+ else if (ntohs(mpa_v2_params->ord) &
+ MPA_V2_RDMA_READ_RTR)
+ ep->mpa_attr.p2p_type =
+ FW_RI_INIT_P2PTYPE_READ_REQ;
+ }
+ }
+ } else if (mpa->revision == 1)
+ if (peer2peer)
+ ep->mpa_attr.p2p_type = p2p_type;
+
+ PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, "
+ "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__,
+ ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled,
+ ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version,
+ ep->mpa_attr.p2p_type);
+
+ /*
+ * If the endpoint timer already expired, then we ignore
+ * the start request. process_timeout() will abort
+ * the connection.
+ */
+ if (!stop_ep_timer(ep)) {
+ __state_set(&ep->com, MPA_REQ_RCVD);
+
+ /* drive upcall */
+ mutex_lock_nested(&ep->parent_ep->com.mutex,
+ SINGLE_DEPTH_NESTING);
+ if (ep->parent_ep->com.state != DEAD) {
+ if (connect_request_upcall(ep))
+ abort_connection(ep, skb, GFP_KERNEL);
+ } else {
+ abort_connection(ep, skb, GFP_KERNEL);
+ }
+ mutex_unlock(&ep->parent_ep->com.mutex);
+ }
+ return;
+}
+
+static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_rx_data *hdr = cplhdr(skb);
+ unsigned int dlen = ntohs(hdr->len);
+ unsigned int tid = GET_TID(hdr);
+ struct tid_info *t = dev->rdev.lldi.tids;
+ __u8 status = hdr->status;
+ int disconnect = 0;
+
+ ep = lookup_tid(t, tid);
+ if (!ep)
+ return 0;
+ PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen);
+ skb_pull(skb, sizeof(*hdr));
+ skb_trim(skb, dlen);
+ mutex_lock(&ep->com.mutex);
+
+ /* update RX credits */
+ update_rx_credits(ep, dlen);
+
+ switch (ep->com.state) {
+ case MPA_REQ_SENT:
+ ep->rcv_seq += dlen;
+ disconnect = process_mpa_reply(ep, skb);
+ break;
+ case MPA_REQ_WAIT:
+ ep->rcv_seq += dlen;
+ process_mpa_request(ep, skb);
+ break;
+ case FPDU_MODE: {
+ struct c4iw_qp_attributes attrs;
+ BUG_ON(!ep->com.qp);
+ if (status)
+ pr_err("%s Unexpected streaming data." \
+ " qpid %u ep %p state %d tid %u status %d\n",
+ __func__, ep->com.qp->wq.sq.qid, ep,
+ ep->com.state, ep->hwtid, status);
+ attrs.next_state = C4IW_QP_STATE_TERMINATE;
+ c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+ C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+ disconnect = 1;
+ break;
+ }
+ default:
+ break;
+ }
+ mutex_unlock(&ep->com.mutex);
+ if (disconnect)
+ c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
+ return 0;
+}
+
+static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_abort_rpl_rss *rpl = cplhdr(skb);
+ int release = 0;
+ unsigned int tid = GET_TID(rpl);
+ struct tid_info *t = dev->rdev.lldi.tids;
+
+ ep = lookup_tid(t, tid);
+ if (!ep) {
+ printk(KERN_WARNING MOD "Abort rpl to freed endpoint\n");
+ return 0;
+ }
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ mutex_lock(&ep->com.mutex);
+ switch (ep->com.state) {
+ case ABORTING:
+ c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
+ __state_set(&ep->com, DEAD);
+ release = 1;
+ break;
+ default:
+ printk(KERN_ERR "%s ep %p state %d\n",
+ __func__, ep, ep->com.state);
+ break;
+ }
+ mutex_unlock(&ep->com.mutex);
+
+ if (release)
+ release_ep_resources(ep);
+ return 0;
+}
+
+static void send_fw_act_open_req(struct c4iw_ep *ep, unsigned int atid)
+{
+ struct sk_buff *skb;
+ struct fw_ofld_connection_wr *req;
+ unsigned int mtu_idx;
+ int wscale;
+ struct sockaddr_in *sin;
+ int win;
+
+ skb = get_skb(NULL, sizeof(*req), GFP_KERNEL);
+ req = (struct fw_ofld_connection_wr *)__skb_put(skb, sizeof(*req));
+ memset(req, 0, sizeof(*req));
+ req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR));
+ req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
+ req->le.filter = cpu_to_be32(cxgb4_select_ntuple(
+ ep->com.dev->rdev.lldi.ports[0],
+ ep->l2t));
+ sin = (struct sockaddr_in *)&ep->com.mapped_local_addr;
+ req->le.lport = sin->sin_port;
+ req->le.u.ipv4.lip = sin->sin_addr.s_addr;
+ sin = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
+ req->le.pport = sin->sin_port;
+ req->le.u.ipv4.pip = sin->sin_addr.s_addr;
+ req->tcb.t_state_to_astid =
+ htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_SENT) |
+ FW_OFLD_CONNECTION_WR_ASTID_V(atid));
+ req->tcb.cplrxdataack_cplpassacceptrpl =
+ htons(FW_OFLD_CONNECTION_WR_CPLRXDATAACK_F);
+ req->tcb.tx_max = (__force __be32) jiffies;
+ req->tcb.rcv_adv = htons(1);
+ best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
+ enable_tcp_timestamps,
+ (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
+ wscale = compute_wscale(rcv_win);
+
+ /*
+ * Specify the largest window that will fit in opt0. The
+ * remainder will be specified in the rx_data_ack.
+ */
+ win = ep->rcv_win >> 10;
+ if (win > RCV_BUFSIZ_M)
+ win = RCV_BUFSIZ_M;
+
+ req->tcb.opt0 = (__force __be64) (TCAM_BYPASS_F |
+ (nocong ? NO_CONG_F : 0) |
+ KEEP_ALIVE_F |
+ DELACK_F |
+ WND_SCALE_V(wscale) |
+ MSS_IDX_V(mtu_idx) |
+ L2T_IDX_V(ep->l2t->idx) |
+ TX_CHAN_V(ep->tx_chan) |
+ SMAC_SEL_V(ep->smac_idx) |
+ DSCP_V(ep->tos) |
+ ULP_MODE_V(ULP_MODE_TCPDDP) |
+ RCV_BUFSIZ_V(win));
+ req->tcb.opt2 = (__force __be32) (PACE_V(1) |
+ TX_QUEUE_V(ep->com.dev->rdev.lldi.tx_modq[ep->tx_chan]) |
+ RX_CHANNEL_V(0) |
+ CCTRL_ECN_V(enable_ecn) |
+ RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid));
+ if (enable_tcp_timestamps)
+ req->tcb.opt2 |= (__force __be32)TSTAMPS_EN_F;
+ if (enable_tcp_sack)
+ req->tcb.opt2 |= (__force __be32)SACK_EN_F;
+ if (wscale && enable_tcp_window_scaling)
+ req->tcb.opt2 |= (__force __be32)WND_SCALE_EN_F;
+ req->tcb.opt0 = cpu_to_be64((__force u64)req->tcb.opt0);
+ req->tcb.opt2 = cpu_to_be32((__force u32)req->tcb.opt2);
+ set_wr_txq(skb, CPL_PRIORITY_CONTROL, ep->ctrlq_idx);
+ set_bit(ACT_OFLD_CONN, &ep->com.history);
+ c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+}
+
+/*
+ * Return whether a failed active open has allocated a TID
+ */
+static inline int act_open_has_tid(int status)
+{
+ return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST &&
+ status != CPL_ERR_ARP_MISS;
+}
+
+/* Returns whether a CPL status conveys negative advice.
+ */
+static int is_neg_adv(unsigned int status)
+{
+ return status == CPL_ERR_RTX_NEG_ADVICE ||
+ status == CPL_ERR_PERSIST_NEG_ADVICE ||
+ status == CPL_ERR_KEEPALV_NEG_ADVICE;
+}
+
+static char *neg_adv_str(unsigned int status)
+{
+ switch (status) {
+ case CPL_ERR_RTX_NEG_ADVICE:
+ return "Retransmit timeout";
+ case CPL_ERR_PERSIST_NEG_ADVICE:
+ return "Persist timeout";
+ case CPL_ERR_KEEPALV_NEG_ADVICE:
+ return "Keepalive timeout";
+ default:
+ return "Unknown";
+ }
+}
+
+static void set_tcp_window(struct c4iw_ep *ep, struct port_info *pi)
+{
+ ep->snd_win = snd_win;
+ ep->rcv_win = rcv_win;
+ PDBG("%s snd_win %d rcv_win %d\n", __func__, ep->snd_win, ep->rcv_win);
+}
+
+#define ACT_OPEN_RETRY_COUNT 2
+
+static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip,
+ struct dst_entry *dst, struct c4iw_dev *cdev,
+ bool clear_mpa_v1)
+{
+ struct neighbour *n;
+ int err, step;
+ struct net_device *pdev;
+
+ n = dst_neigh_lookup(dst, peer_ip);
+ if (!n)
+ return -ENODEV;
+
+ rcu_read_lock();
+ err = -ENOMEM;
+ if (n->dev->flags & IFF_LOOPBACK) {
+ if (iptype == 4)
+ pdev = ip_dev_find(&init_net, *(__be32 *)peer_ip);
+ else if (IS_ENABLED(CONFIG_IPV6))
+ for_each_netdev(&init_net, pdev) {
+ if (ipv6_chk_addr(&init_net,
+ (struct in6_addr *)peer_ip,
+ pdev, 1))
+ break;
+ }
+ else
+ pdev = NULL;
+
+ if (!pdev) {
+ err = -ENODEV;
+ goto out;
+ }
+ ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
+ n, pdev, 0);
+ if (!ep->l2t)
+ goto out;
+ ep->mtu = pdev->mtu;
+ ep->tx_chan = cxgb4_port_chan(pdev);
+ ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
+ step = cdev->rdev.lldi.ntxq /
+ cdev->rdev.lldi.nchan;
+ ep->txq_idx = cxgb4_port_idx(pdev) * step;
+ step = cdev->rdev.lldi.nrxq /
+ cdev->rdev.lldi.nchan;
+ ep->ctrlq_idx = cxgb4_port_idx(pdev);
+ ep->rss_qid = cdev->rdev.lldi.rxq_ids[
+ cxgb4_port_idx(pdev) * step];
+ set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
+ dev_put(pdev);
+ } else {
+ pdev = get_real_dev(n->dev);
+ ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t,
+ n, pdev, 0);
+ if (!ep->l2t)
+ goto out;
+ ep->mtu = dst_mtu(dst);
+ ep->tx_chan = cxgb4_port_chan(pdev);
+ ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1;
+ step = cdev->rdev.lldi.ntxq /
+ cdev->rdev.lldi.nchan;
+ ep->txq_idx = cxgb4_port_idx(pdev) * step;
+ ep->ctrlq_idx = cxgb4_port_idx(pdev);
+ step = cdev->rdev.lldi.nrxq /
+ cdev->rdev.lldi.nchan;
+ ep->rss_qid = cdev->rdev.lldi.rxq_ids[
+ cxgb4_port_idx(pdev) * step];
+ set_tcp_window(ep, (struct port_info *)netdev_priv(pdev));
+
+ if (clear_mpa_v1) {
+ ep->retry_with_mpa_v1 = 0;
+ ep->tried_with_mpa_v1 = 0;
+ }
+ }
+ err = 0;
+out:
+ rcu_read_unlock();
+
+ neigh_release(n);
+
+ return err;
+}
+
+static int c4iw_reconnect(struct c4iw_ep *ep)
+{
+ int err = 0;
+ struct sockaddr_in *laddr = (struct sockaddr_in *)
+ &ep->com.cm_id->local_addr;
+ struct sockaddr_in *raddr = (struct sockaddr_in *)
+ &ep->com.cm_id->remote_addr;
+ struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *)
+ &ep->com.cm_id->local_addr;
+ struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *)
+ &ep->com.cm_id->remote_addr;
+ int iptype;
+ __u8 *ra;
+
+ PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id);
+ init_timer(&ep->timer);
+
+ /*
+ * Allocate an active TID to initiate a TCP connection.
+ */
+ ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep);
+ if (ep->atid == -1) {
+ pr_err("%s - cannot alloc atid.\n", __func__);
+ err = -ENOMEM;
+ goto fail2;
+ }
+ insert_handle(ep->com.dev, &ep->com.dev->atid_idr, ep, ep->atid);
+
+ /* find a route */
+ if (ep->com.cm_id->local_addr.ss_family == AF_INET) {
+ ep->dst = find_route(ep->com.dev, laddr->sin_addr.s_addr,
+ raddr->sin_addr.s_addr, laddr->sin_port,
+ raddr->sin_port, 0);
+ iptype = 4;
+ ra = (__u8 *)&raddr->sin_addr;
+ } else {
+ ep->dst = find_route6(ep->com.dev, laddr6->sin6_addr.s6_addr,
+ raddr6->sin6_addr.s6_addr,
+ laddr6->sin6_port, raddr6->sin6_port, 0,
+ raddr6->sin6_scope_id);
+ iptype = 6;
+ ra = (__u8 *)&raddr6->sin6_addr;
+ }
+ if (!ep->dst) {
+ pr_err("%s - cannot find route.\n", __func__);
+ err = -EHOSTUNREACH;
+ goto fail3;
+ }
+ err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false);
+ if (err) {
+ pr_err("%s - cannot alloc l2e.\n", __func__);
+ goto fail4;
+ }
+
+ PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
+ __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
+ ep->l2t->idx);
+
+ state_set(&ep->com, CONNECTING);
+ ep->tos = 0;
+
+ /* send connect request to rnic */
+ err = send_connect(ep);
+ if (!err)
+ goto out;
+
+ cxgb4_l2t_release(ep->l2t);
+fail4:
+ dst_release(ep->dst);
+fail3:
+ remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
+ cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
+fail2:
+ /*
+ * remember to send notification to upper layer.
+ * We are in here so the upper layer is not aware that this is
+ * re-connect attempt and so, upper layer is still waiting for
+ * response of 1st connect request.
+ */
+ connect_reply_upcall(ep, -ECONNRESET);
+ c4iw_put_ep(&ep->com);
+out:
+ return err;
+}
+
+static int act_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_act_open_rpl *rpl = cplhdr(skb);
+ unsigned int atid = TID_TID_G(AOPEN_ATID_G(
+ ntohl(rpl->atid_status)));
+ struct tid_info *t = dev->rdev.lldi.tids;
+ int status = AOPEN_STATUS_G(ntohl(rpl->atid_status));
+ struct sockaddr_in *la;
+ struct sockaddr_in *ra;
+ struct sockaddr_in6 *la6;
+ struct sockaddr_in6 *ra6;
+
+ ep = lookup_atid(t, atid);
+ la = (struct sockaddr_in *)&ep->com.mapped_local_addr;
+ ra = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
+ la6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
+ ra6 = (struct sockaddr_in6 *)&ep->com.mapped_remote_addr;
+
+ PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid,
+ status, status2errno(status));
+
+ if (is_neg_adv(status)) {
+ PDBG("%s Connection problems for atid %u status %u (%s)\n",
+ __func__, atid, status, neg_adv_str(status));
+ ep->stats.connect_neg_adv++;
+ mutex_lock(&dev->rdev.stats.lock);
+ dev->rdev.stats.neg_adv++;
+ mutex_unlock(&dev->rdev.stats.lock);
+ return 0;
+ }
+
+ set_bit(ACT_OPEN_RPL, &ep->com.history);
+
+ /*
+ * Log interesting failures.
+ */
+ switch (status) {
+ case CPL_ERR_CONN_RESET:
+ case CPL_ERR_CONN_TIMEDOUT:
+ break;
+ case CPL_ERR_TCAM_FULL:
+ mutex_lock(&dev->rdev.stats.lock);
+ dev->rdev.stats.tcam_full++;
+ mutex_unlock(&dev->rdev.stats.lock);
+ if (ep->com.local_addr.ss_family == AF_INET &&
+ dev->rdev.lldi.enable_fw_ofld_conn) {
+ send_fw_act_open_req(ep,
+ TID_TID_G(AOPEN_ATID_G(
+ ntohl(rpl->atid_status))));
+ return 0;
+ }
+ break;
+ case CPL_ERR_CONN_EXIST:
+ if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
+ set_bit(ACT_RETRY_INUSE, &ep->com.history);
+ remove_handle(ep->com.dev, &ep->com.dev->atid_idr,
+ atid);
+ cxgb4_free_atid(t, atid);
+ dst_release(ep->dst);
+ cxgb4_l2t_release(ep->l2t);
+ c4iw_reconnect(ep);
+ return 0;
+ }
+ break;
+ default:
+ if (ep->com.local_addr.ss_family == AF_INET) {
+ pr_info("Active open failure - atid %u status %u errno %d %pI4:%u->%pI4:%u\n",
+ atid, status, status2errno(status),
+ &la->sin_addr.s_addr, ntohs(la->sin_port),
+ &ra->sin_addr.s_addr, ntohs(ra->sin_port));
+ } else {
+ pr_info("Active open failure - atid %u status %u errno %d %pI6:%u->%pI6:%u\n",
+ atid, status, status2errno(status),
+ la6->sin6_addr.s6_addr, ntohs(la6->sin6_port),
+ ra6->sin6_addr.s6_addr, ntohs(ra6->sin6_port));
+ }
+ break;
+ }
+
+ connect_reply_upcall(ep, status2errno(status));
+ state_set(&ep->com, DEAD);
+
+ if (status && act_open_has_tid(status))
+ cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl));
+
+ remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid);
+ cxgb4_free_atid(t, atid);
+ dst_release(ep->dst);
+ cxgb4_l2t_release(ep->l2t);
+ c4iw_put_ep(&ep->com);
+
+ return 0;
+}
+
+static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_pass_open_rpl *rpl = cplhdr(skb);
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int stid = GET_TID(rpl);
+ struct c4iw_listen_ep *ep = lookup_stid(t, stid);
+
+ if (!ep) {
+ PDBG("%s stid %d lookup failure!\n", __func__, stid);
+ goto out;
+ }
+ PDBG("%s ep %p status %d error %d\n", __func__, ep,
+ rpl->status, status2errno(rpl->status));
+ c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
+
+out:
+ return 0;
+}
+
+static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_close_listsvr_rpl *rpl = cplhdr(skb);
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int stid = GET_TID(rpl);
+ struct c4iw_listen_ep *ep = lookup_stid(t, stid);
+
+ PDBG("%s ep %p\n", __func__, ep);
+ c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status));
+ return 0;
+}
+
+static void accept_cr(struct c4iw_ep *ep, struct sk_buff *skb,
+ struct cpl_pass_accept_req *req)
+{
+ struct cpl_pass_accept_rpl *rpl;
+ unsigned int mtu_idx;
+ u64 opt0;
+ u32 opt2;
+ int wscale;
+ struct cpl_t5_pass_accept_rpl *rpl5 = NULL;
+ int win;
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ BUG_ON(skb_cloned(skb));
+
+ skb_get(skb);
+ rpl = cplhdr(skb);
+ if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
+ skb_trim(skb, roundup(sizeof(*rpl5), 16));
+ rpl5 = (void *)rpl;
+ INIT_TP_WR(rpl5, ep->hwtid);
+ } else {
+ skb_trim(skb, sizeof(*rpl));
+ INIT_TP_WR(rpl, ep->hwtid);
+ }
+ OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL,
+ ep->hwtid));
+
+ best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx,
+ enable_tcp_timestamps && req->tcpopt.tstamp,
+ (AF_INET == ep->com.remote_addr.ss_family) ? 0 : 1);
+ wscale = compute_wscale(rcv_win);
+
+ /*
+ * Specify the largest window that will fit in opt0. The
+ * remainder will be specified in the rx_data_ack.
+ */
+ win = ep->rcv_win >> 10;
+ if (win > RCV_BUFSIZ_M)
+ win = RCV_BUFSIZ_M;
+ opt0 = (nocong ? NO_CONG_F : 0) |
+ KEEP_ALIVE_F |
+ DELACK_F |
+ WND_SCALE_V(wscale) |
+ MSS_IDX_V(mtu_idx) |
+ L2T_IDX_V(ep->l2t->idx) |
+ TX_CHAN_V(ep->tx_chan) |
+ SMAC_SEL_V(ep->smac_idx) |
+ DSCP_V(ep->tos >> 2) |
+ ULP_MODE_V(ULP_MODE_TCPDDP) |
+ RCV_BUFSIZ_V(win);
+ opt2 = RX_CHANNEL_V(0) |
+ RSS_QUEUE_VALID_F | RSS_QUEUE_V(ep->rss_qid);
+
+ if (enable_tcp_timestamps && req->tcpopt.tstamp)
+ opt2 |= TSTAMPS_EN_F;
+ if (enable_tcp_sack && req->tcpopt.sack)
+ opt2 |= SACK_EN_F;
+ if (wscale && enable_tcp_window_scaling)
+ opt2 |= WND_SCALE_EN_F;
+ if (enable_ecn) {
+ const struct tcphdr *tcph;
+ u32 hlen = ntohl(req->hdr_len);
+
+ tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) +
+ IP_HDR_LEN_G(hlen);
+ if (tcph->ece && tcph->cwr)
+ opt2 |= CCTRL_ECN_V(1);
+ }
+ if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) {
+ u32 isn = (prandom_u32() & ~7UL) - 1;
+ opt2 |= T5_OPT_2_VALID_F;
+ opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE);
+ opt2 |= T5_ISS_F;
+ rpl5 = (void *)rpl;
+ memset(&rpl5->iss, 0, roundup(sizeof(*rpl5)-sizeof(*rpl), 16));
+ if (peer2peer)
+ isn += 4;
+ rpl5->iss = cpu_to_be32(isn);
+ PDBG("%s iss %u\n", __func__, be32_to_cpu(rpl5->iss));
+ }
+
+ rpl->opt0 = cpu_to_be64(opt0);
+ rpl->opt2 = cpu_to_be32(opt2);
+ set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx);
+ t4_set_arp_err_handler(skb, NULL, arp_failure_discard);
+ c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t);
+
+ return;
+}
+
+static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb)
+{
+ PDBG("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid);
+ BUG_ON(skb_cloned(skb));
+ skb_trim(skb, sizeof(struct cpl_tid_release));
+ release_tid(&dev->rdev, hwtid, skb);
+ return;
+}
+
+static void get_4tuple(struct cpl_pass_accept_req *req, int *iptype,
+ __u8 *local_ip, __u8 *peer_ip,
+ __be16 *local_port, __be16 *peer_port)
+{
+ int eth_len = ETH_HDR_LEN_G(be32_to_cpu(req->hdr_len));
+ int ip_len = IP_HDR_LEN_G(be32_to_cpu(req->hdr_len));
+ struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len);
+ struct ipv6hdr *ip6 = (struct ipv6hdr *)((u8 *)(req + 1) + eth_len);
+ struct tcphdr *tcp = (struct tcphdr *)
+ ((u8 *)(req + 1) + eth_len + ip_len);
+
+ if (ip->version == 4) {
+ PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__,
+ ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source),
+ ntohs(tcp->dest));
+ *iptype = 4;
+ memcpy(peer_ip, &ip->saddr, 4);
+ memcpy(local_ip, &ip->daddr, 4);
+ } else {
+ PDBG("%s saddr %pI6 daddr %pI6 sport %u dport %u\n", __func__,
+ ip6->saddr.s6_addr, ip6->daddr.s6_addr, ntohs(tcp->source),
+ ntohs(tcp->dest));
+ *iptype = 6;
+ memcpy(peer_ip, ip6->saddr.s6_addr, 16);
+ memcpy(local_ip, ip6->daddr.s6_addr, 16);
+ }
+ *peer_port = tcp->source;
+ *local_port = tcp->dest;
+
+ return;
+}
+
+static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *child_ep = NULL, *parent_ep;
+ struct cpl_pass_accept_req *req = cplhdr(skb);
+ unsigned int stid = PASS_OPEN_TID_G(ntohl(req->tos_stid));
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int hwtid = GET_TID(req);
+ struct dst_entry *dst;
+ __u8 local_ip[16], peer_ip[16];
+ __be16 local_port, peer_port;
+ int err;
+ u16 peer_mss = ntohs(req->tcpopt.mss);
+ int iptype;
+ unsigned short hdrs;
+
+ parent_ep = lookup_stid(t, stid);
+ if (!parent_ep) {
+ PDBG("%s connect request on invalid stid %d\n", __func__, stid);
+ goto reject;
+ }
+
+ if (state_read(&parent_ep->com) != LISTEN) {
+ printk(KERN_ERR "%s - listening ep not in LISTEN\n",
+ __func__);
+ goto reject;
+ }
+
+ get_4tuple(req, &iptype, local_ip, peer_ip, &local_port, &peer_port);
+
+ /* Find output route */
+ if (iptype == 4) {
+ PDBG("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n"
+ , __func__, parent_ep, hwtid,
+ local_ip, peer_ip, ntohs(local_port),
+ ntohs(peer_port), peer_mss);
+ dst = find_route(dev, *(__be32 *)local_ip, *(__be32 *)peer_ip,
+ local_port, peer_port,
+ PASS_OPEN_TOS_G(ntohl(req->tos_stid)));
+ } else {
+ PDBG("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n"
+ , __func__, parent_ep, hwtid,
+ local_ip, peer_ip, ntohs(local_port),
+ ntohs(peer_port), peer_mss);
+ dst = find_route6(dev, local_ip, peer_ip, local_port, peer_port,
+ PASS_OPEN_TOS_G(ntohl(req->tos_stid)),
+ ((struct sockaddr_in6 *)
+ &parent_ep->com.local_addr)->sin6_scope_id);
+ }
+ if (!dst) {
+ printk(KERN_ERR MOD "%s - failed to find dst entry!\n",
+ __func__);
+ goto reject;
+ }
+
+ child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL);
+ if (!child_ep) {
+ printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n",
+ __func__);
+ dst_release(dst);
+ goto reject;
+ }
+
+ err = import_ep(child_ep, iptype, peer_ip, dst, dev, false);
+ if (err) {
+ printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n",
+ __func__);
+ dst_release(dst);
+ kfree(child_ep);
+ goto reject;
+ }
+
+ hdrs = sizeof(struct iphdr) + sizeof(struct tcphdr) +
+ ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0);
+ if (peer_mss && child_ep->mtu > (peer_mss + hdrs))
+ child_ep->mtu = peer_mss + hdrs;
+
+ state_set(&child_ep->com, CONNECTING);
+ child_ep->com.dev = dev;
+ child_ep->com.cm_id = NULL;
+
+ /*
+ * The mapped_local and mapped_remote addresses get setup with
+ * the actual 4-tuple. The local address will be based on the
+ * actual local address of the connection, but on the port number
+ * of the parent listening endpoint. The remote address is
+ * setup based on a query to the IWPM since we don't know what it
+ * originally was before mapping. If no mapping was done, then
+ * mapped_remote == remote, and mapped_local == local.
+ */
+ if (iptype == 4) {
+ struct sockaddr_in *sin = (struct sockaddr_in *)
+ &child_ep->com.mapped_local_addr;
+
+ sin->sin_family = PF_INET;
+ sin->sin_port = local_port;
+ sin->sin_addr.s_addr = *(__be32 *)local_ip;
+
+ sin = (struct sockaddr_in *)&child_ep->com.local_addr;
+ sin->sin_family = PF_INET;
+ sin->sin_port = ((struct sockaddr_in *)
+ &parent_ep->com.local_addr)->sin_port;
+ sin->sin_addr.s_addr = *(__be32 *)local_ip;
+
+ sin = (struct sockaddr_in *)&child_ep->com.mapped_remote_addr;
+ sin->sin_family = PF_INET;
+ sin->sin_port = peer_port;
+ sin->sin_addr.s_addr = *(__be32 *)peer_ip;
+ } else {
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
+ &child_ep->com.mapped_local_addr;
+
+ sin6->sin6_family = PF_INET6;
+ sin6->sin6_port = local_port;
+ memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
+
+ sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr;
+ sin6->sin6_family = PF_INET6;
+ sin6->sin6_port = ((struct sockaddr_in6 *)
+ &parent_ep->com.local_addr)->sin6_port;
+ memcpy(sin6->sin6_addr.s6_addr, local_ip, 16);
+
+ sin6 = (struct sockaddr_in6 *)&child_ep->com.mapped_remote_addr;
+ sin6->sin6_family = PF_INET6;
+ sin6->sin6_port = peer_port;
+ memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16);
+ }
+ memcpy(&child_ep->com.remote_addr, &child_ep->com.mapped_remote_addr,
+ sizeof(child_ep->com.remote_addr));
+ get_remote_addr(parent_ep, child_ep);
+
+ c4iw_get_ep(&parent_ep->com);
+ child_ep->parent_ep = parent_ep;
+ child_ep->tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid));
+ child_ep->dst = dst;
+ child_ep->hwtid = hwtid;
+
+ PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__,
+ child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid);
+
+ init_timer(&child_ep->timer);
+ cxgb4_insert_tid(t, child_ep, hwtid);
+ insert_handle(dev, &dev->hwtid_idr, child_ep, child_ep->hwtid);
+ accept_cr(child_ep, skb, req);
+ set_bit(PASS_ACCEPT_REQ, &child_ep->com.history);
+ goto out;
+reject:
+ reject_cr(dev, hwtid, skb);
+out:
+ return 0;
+}
+
+static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_pass_establish *req = cplhdr(skb);
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int tid = GET_TID(req);
+
+ ep = lookup_tid(t, tid);
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ ep->snd_seq = be32_to_cpu(req->snd_isn);
+ ep->rcv_seq = be32_to_cpu(req->rcv_isn);
+
+ PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid,
+ ntohs(req->tcp_opt));
+
+ set_emss(ep, ntohs(req->tcp_opt));
+
+ dst_confirm(ep->dst);
+ state_set(&ep->com, MPA_REQ_WAIT);
+ start_ep_timer(ep);
+ send_flowc(ep, skb);
+ set_bit(PASS_ESTAB, &ep->com.history);
+
+ return 0;
+}
+
+static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_peer_close *hdr = cplhdr(skb);
+ struct c4iw_ep *ep;
+ struct c4iw_qp_attributes attrs;
+ int disconnect = 1;
+ int release = 0;
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int tid = GET_TID(hdr);
+ int ret;
+
+ ep = lookup_tid(t, tid);
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ dst_confirm(ep->dst);
+
+ set_bit(PEER_CLOSE, &ep->com.history);
+ mutex_lock(&ep->com.mutex);
+ switch (ep->com.state) {
+ case MPA_REQ_WAIT:
+ __state_set(&ep->com, CLOSING);
+ break;
+ case MPA_REQ_SENT:
+ __state_set(&ep->com, CLOSING);
+ connect_reply_upcall(ep, -ECONNRESET);
+ break;
+ case MPA_REQ_RCVD:
+
+ /*
+ * We're gonna mark this puppy DEAD, but keep
+ * the reference on it until the ULP accepts or
+ * rejects the CR. Also wake up anyone waiting
+ * in rdma connection migration (see c4iw_accept_cr()).
+ */
+ __state_set(&ep->com, CLOSING);
+ PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
+ c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
+ break;
+ case MPA_REP_SENT:
+ __state_set(&ep->com, CLOSING);
+ PDBG("waking up ep %p tid %u\n", ep, ep->hwtid);
+ c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
+ break;
+ case FPDU_MODE:
+ start_ep_timer(ep);
+ __state_set(&ep->com, CLOSING);
+ attrs.next_state = C4IW_QP_STATE_CLOSING;
+ ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+ C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+ if (ret != -ECONNRESET) {
+ peer_close_upcall(ep);
+ disconnect = 1;
+ }
+ break;
+ case ABORTING:
+ disconnect = 0;
+ break;
+ case CLOSING:
+ __state_set(&ep->com, MORIBUND);
+ disconnect = 0;
+ break;
+ case MORIBUND:
+ (void)stop_ep_timer(ep);
+ if (ep->com.cm_id && ep->com.qp) {
+ attrs.next_state = C4IW_QP_STATE_IDLE;
+ c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+ C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+ }
+ close_complete_upcall(ep, 0);
+ __state_set(&ep->com, DEAD);
+ release = 1;
+ disconnect = 0;
+ break;
+ case DEAD:
+ disconnect = 0;
+ break;
+ default:
+ BUG_ON(1);
+ }
+ mutex_unlock(&ep->com.mutex);
+ if (disconnect)
+ c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
+ if (release)
+ release_ep_resources(ep);
+ return 0;
+}
+
+static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_abort_req_rss *req = cplhdr(skb);
+ struct c4iw_ep *ep;
+ struct cpl_abort_rpl *rpl;
+ struct sk_buff *rpl_skb;
+ struct c4iw_qp_attributes attrs;
+ int ret;
+ int release = 0;
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int tid = GET_TID(req);
+
+ ep = lookup_tid(t, tid);
+ if (is_neg_adv(req->status)) {
+ PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
+ __func__, ep->hwtid, req->status,
+ neg_adv_str(req->status));
+ ep->stats.abort_neg_adv++;
+ mutex_lock(&dev->rdev.stats.lock);
+ dev->rdev.stats.neg_adv++;
+ mutex_unlock(&dev->rdev.stats.lock);
+ return 0;
+ }
+ PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
+ ep->com.state);
+ set_bit(PEER_ABORT, &ep->com.history);
+
+ /*
+ * Wake up any threads in rdma_init() or rdma_fini().
+ * However, this is not needed if com state is just
+ * MPA_REQ_SENT
+ */
+ if (ep->com.state != MPA_REQ_SENT)
+ c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
+
+ mutex_lock(&ep->com.mutex);
+ switch (ep->com.state) {
+ case CONNECTING:
+ break;
+ case MPA_REQ_WAIT:
+ (void)stop_ep_timer(ep);
+ break;
+ case MPA_REQ_SENT:
+ (void)stop_ep_timer(ep);
+ if (mpa_rev == 1 || (mpa_rev == 2 && ep->tried_with_mpa_v1))
+ connect_reply_upcall(ep, -ECONNRESET);
+ else {
+ /*
+ * we just don't send notification upwards because we
+ * want to retry with mpa_v1 without upper layers even
+ * knowing it.
+ *
+ * do some housekeeping so as to re-initiate the
+ * connection
+ */
+ PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__,
+ mpa_rev);
+ ep->retry_with_mpa_v1 = 1;
+ }
+ break;
+ case MPA_REP_SENT:
+ break;
+ case MPA_REQ_RCVD:
+ break;
+ case MORIBUND:
+ case CLOSING:
+ stop_ep_timer(ep);
+ /*FALLTHROUGH*/
+ case FPDU_MODE:
+ if (ep->com.cm_id && ep->com.qp) {
+ attrs.next_state = C4IW_QP_STATE_ERROR;
+ ret = c4iw_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
+ &attrs, 1);
+ if (ret)
+ printk(KERN_ERR MOD
+ "%s - qp <- error failed!\n",
+ __func__);
+ }
+ peer_abort_upcall(ep);
+ break;
+ case ABORTING:
+ break;
+ case DEAD:
+ PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__);
+ mutex_unlock(&ep->com.mutex);
+ return 0;
+ default:
+ BUG_ON(1);
+ break;
+ }
+ dst_confirm(ep->dst);
+ if (ep->com.state != ABORTING) {
+ __state_set(&ep->com, DEAD);
+ /* we don't release if we want to retry with mpa_v1 */
+ if (!ep->retry_with_mpa_v1)
+ release = 1;
+ }
+ mutex_unlock(&ep->com.mutex);
+
+ rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL);
+ if (!rpl_skb) {
+ printk(KERN_ERR MOD "%s - cannot allocate skb!\n",
+ __func__);
+ release = 1;
+ goto out;
+ }
+ set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx);
+ rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl));
+ INIT_TP_WR(rpl, ep->hwtid);
+ OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid));
+ rpl->cmd = CPL_ABORT_NO_RST;
+ c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb);
+out:
+ if (release)
+ release_ep_resources(ep);
+ else if (ep->retry_with_mpa_v1) {
+ remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid);
+ cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid);
+ dst_release(ep->dst);
+ cxgb4_l2t_release(ep->l2t);
+ c4iw_reconnect(ep);
+ }
+
+ return 0;
+}
+
+static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct c4iw_qp_attributes attrs;
+ struct cpl_close_con_rpl *rpl = cplhdr(skb);
+ int release = 0;
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int tid = GET_TID(rpl);
+
+ ep = lookup_tid(t, tid);
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+ BUG_ON(!ep);
+
+ /* The cm_id may be null if we failed to connect */
+ mutex_lock(&ep->com.mutex);
+ switch (ep->com.state) {
+ case CLOSING:
+ __state_set(&ep->com, MORIBUND);
+ break;
+ case MORIBUND:
+ (void)stop_ep_timer(ep);
+ if ((ep->com.cm_id) && (ep->com.qp)) {
+ attrs.next_state = C4IW_QP_STATE_IDLE;
+ c4iw_modify_qp(ep->com.qp->rhp,
+ ep->com.qp,
+ C4IW_QP_ATTR_NEXT_STATE,
+ &attrs, 1);
+ }
+ close_complete_upcall(ep, 0);
+ __state_set(&ep->com, DEAD);
+ release = 1;
+ break;
+ case ABORTING:
+ case DEAD:
+ break;
+ default:
+ BUG_ON(1);
+ break;
+ }
+ mutex_unlock(&ep->com.mutex);
+ if (release)
+ release_ep_resources(ep);
+ return 0;
+}
+
+static int terminate(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_rdma_terminate *rpl = cplhdr(skb);
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int tid = GET_TID(rpl);
+ struct c4iw_ep *ep;
+ struct c4iw_qp_attributes attrs;
+
+ ep = lookup_tid(t, tid);
+ BUG_ON(!ep);
+
+ if (ep && ep->com.qp) {
+ printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid,
+ ep->com.qp->wq.sq.qid);
+ attrs.next_state = C4IW_QP_STATE_TERMINATE;
+ c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp,
+ C4IW_QP_ATTR_NEXT_STATE, &attrs, 1);
+ } else
+ printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid);
+
+ return 0;
+}
+
+/*
+ * Upcall from the adapter indicating data has been transmitted.
+ * For us its just the single MPA request or reply. We can now free
+ * the skb holding the mpa message.
+ */
+static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+ struct cpl_fw4_ack *hdr = cplhdr(skb);
+ u8 credits = hdr->credits;
+ unsigned int tid = GET_TID(hdr);
+ struct tid_info *t = dev->rdev.lldi.tids;
+
+
+ ep = lookup_tid(t, tid);
+ PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits);
+ if (credits == 0) {
+ PDBG("%s 0 credit ack ep %p tid %u state %u\n",
+ __func__, ep, ep->hwtid, state_read(&ep->com));
+ return 0;
+ }
+
+ dst_confirm(ep->dst);
+ if (ep->mpa_skb) {
+ PDBG("%s last streaming msg ack ep %p tid %u state %u "
+ "initiator %u freeing skb\n", __func__, ep, ep->hwtid,
+ state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0);
+ kfree_skb(ep->mpa_skb);
+ ep->mpa_skb = NULL;
+ }
+ return 0;
+}
+
+int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
+{
+ int err = 0;
+ int disconnect = 0;
+ struct c4iw_ep *ep = to_ep(cm_id);
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+
+ mutex_lock(&ep->com.mutex);
+ if (ep->com.state == DEAD) {
+ mutex_unlock(&ep->com.mutex);
+ c4iw_put_ep(&ep->com);
+ return -ECONNRESET;
+ }
+ set_bit(ULP_REJECT, &ep->com.history);
+ BUG_ON(ep->com.state != MPA_REQ_RCVD);
+ if (mpa_rev == 0)
+ abort_connection(ep, NULL, GFP_KERNEL);
+ else {
+ err = send_mpa_reject(ep, pdata, pdata_len);
+ disconnect = 1;
+ }
+ mutex_unlock(&ep->com.mutex);
+ if (disconnect)
+ err = c4iw_ep_disconnect(ep, 0, GFP_KERNEL);
+ c4iw_put_ep(&ep->com);
+ return 0;
+}
+
+int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
+{
+ int err;
+ struct c4iw_qp_attributes attrs;
+ enum c4iw_qp_attr_mask mask;
+ struct c4iw_ep *ep = to_ep(cm_id);
+ struct c4iw_dev *h = to_c4iw_dev(cm_id->device);
+ struct c4iw_qp *qp = get_qhp(h, conn_param->qpn);
+
+ PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid);
+
+ mutex_lock(&ep->com.mutex);
+ if (ep->com.state == DEAD) {
+ err = -ECONNRESET;
+ goto err;
+ }
+
+ BUG_ON(ep->com.state != MPA_REQ_RCVD);
+ BUG_ON(!qp);
+
+ set_bit(ULP_ACCEPT, &ep->com.history);
+ if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) ||
+ (conn_param->ird > cur_max_read_depth(ep->com.dev))) {
+ abort_connection(ep, NULL, GFP_KERNEL);
+ err = -EINVAL;
+ goto err;
+ }
+
+ if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) {
+ if (conn_param->ord > ep->ird) {
+ if (RELAXED_IRD_NEGOTIATION) {
+ ep->ord = ep->ird;
+ } else {
+ ep->ird = conn_param->ird;
+ ep->ord = conn_param->ord;
+ send_mpa_reject(ep, conn_param->private_data,
+ conn_param->private_data_len);
+ abort_connection(ep, NULL, GFP_KERNEL);
+ err = -ENOMEM;
+ goto err;
+ }
+ }
+ if (conn_param->ird < ep->ord) {
+ if (RELAXED_IRD_NEGOTIATION &&
+ ep->ord <= h->rdev.lldi.max_ordird_qp) {
+ conn_param->ird = ep->ord;
+ } else {
+ abort_connection(ep, NULL, GFP_KERNEL);
+ err = -ENOMEM;
+ goto err;
+ }
+ }
+ }
+ ep->ird = conn_param->ird;
+ ep->ord = conn_param->ord;
+
+ if (ep->mpa_attr.version == 1) {
+ if (peer2peer && ep->ird == 0)
+ ep->ird = 1;
+ } else {
+ if (peer2peer &&
+ (ep->mpa_attr.p2p_type != FW_RI_INIT_P2PTYPE_DISABLED) &&
+ (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) && ep->ord == 0)
+ ep->ird = 1;
+ }
+
+ PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord);
+
+ cm_id->add_ref(cm_id);
+ ep->com.cm_id = cm_id;
+ ep->com.qp = qp;
+ ref_qp(ep);
+
+ /* bind QP to EP and move to RTS */
+ attrs.mpa_attr = ep->mpa_attr;
+ attrs.max_ird = ep->ird;
+ attrs.max_ord = ep->ord;
+ attrs.llp_stream_handle = ep;
+ attrs.next_state = C4IW_QP_STATE_RTS;
+
+ /* bind QP and TID with INIT_WR */
+ mask = C4IW_QP_ATTR_NEXT_STATE |
+ C4IW_QP_ATTR_LLP_STREAM_HANDLE |
+ C4IW_QP_ATTR_MPA_ATTR |
+ C4IW_QP_ATTR_MAX_IRD |
+ C4IW_QP_ATTR_MAX_ORD;
+
+ err = c4iw_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, mask, &attrs, 1);
+ if (err)
+ goto err1;
+ err = send_mpa_reply(ep, conn_param->private_data,
+ conn_param->private_data_len);
+ if (err)
+ goto err1;
+
+ __state_set(&ep->com, FPDU_MODE);
+ established_upcall(ep);
+ mutex_unlock(&ep->com.mutex);
+ c4iw_put_ep(&ep->com);
+ return 0;
+err1:
+ ep->com.cm_id = NULL;
+ abort_connection(ep, NULL, GFP_KERNEL);
+ cm_id->rem_ref(cm_id);
+err:
+ mutex_unlock(&ep->com.mutex);
+ c4iw_put_ep(&ep->com);
+ return err;
+}
+
+static int pick_local_ipaddrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
+{
+ struct in_device *ind;
+ int found = 0;
+ struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->local_addr;
+ struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->remote_addr;
+
+ ind = in_dev_get(dev->rdev.lldi.ports[0]);
+ if (!ind)
+ return -EADDRNOTAVAIL;
+ for_primary_ifa(ind) {
+ laddr->sin_addr.s_addr = ifa->ifa_address;
+ raddr->sin_addr.s_addr = ifa->ifa_address;
+ found = 1;
+ break;
+ }
+ endfor_ifa(ind);
+ in_dev_put(ind);
+ return found ? 0 : -EADDRNOTAVAIL;
+}
+
+static int get_lladdr(struct net_device *dev, struct in6_addr *addr,
+ unsigned char banned_flags)
+{
+ struct inet6_dev *idev;
+ int err = -EADDRNOTAVAIL;
+
+ rcu_read_lock();
+ idev = __in6_dev_get(dev);
+ if (idev != NULL) {
+ struct inet6_ifaddr *ifp;
+
+ read_lock_bh(&idev->lock);
+ list_for_each_entry(ifp, &idev->addr_list, if_list) {
+ if (ifp->scope == IFA_LINK &&
+ !(ifp->flags & banned_flags)) {
+ memcpy(addr, &ifp->addr, 16);
+ err = 0;
+ break;
+ }
+ }
+ read_unlock_bh(&idev->lock);
+ }
+ rcu_read_unlock();
+ return err;
+}
+
+static int pick_local_ip6addrs(struct c4iw_dev *dev, struct iw_cm_id *cm_id)
+{
+ struct in6_addr uninitialized_var(addr);
+ struct sockaddr_in6 *la6 = (struct sockaddr_in6 *)&cm_id->local_addr;
+ struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->remote_addr;
+
+ if (get_lladdr(dev->rdev.lldi.ports[0], &addr, IFA_F_TENTATIVE)) {
+ memcpy(la6->sin6_addr.s6_addr, &addr, 16);
+ memcpy(ra6->sin6_addr.s6_addr, &addr, 16);
+ return 0;
+ }
+ return -EADDRNOTAVAIL;
+}
+
+int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
+{
+ struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
+ struct c4iw_ep *ep;
+ int err = 0;
+ 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;
+ __u8 *ra;
+ int iptype;
+ int iwpm_err = 0;
+
+ if ((conn_param->ord > cur_max_read_depth(dev)) ||
+ (conn_param->ird > cur_max_read_depth(dev))) {
+ err = -EINVAL;
+ goto out;
+ }
+ ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
+ if (!ep) {
+ printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
+ err = -ENOMEM;
+ goto out;
+ }
+ init_timer(&ep->timer);
+ ep->plen = conn_param->private_data_len;
+ if (ep->plen)
+ memcpy(ep->mpa_pkt + sizeof(struct mpa_message),
+ conn_param->private_data, ep->plen);
+ ep->ird = conn_param->ird;
+ ep->ord = conn_param->ord;
+
+ if (peer2peer && ep->ord == 0)
+ ep->ord = 1;
+
+ cm_id->add_ref(cm_id);
+ ep->com.dev = dev;
+ ep->com.cm_id = cm_id;
+ ep->com.qp = get_qhp(dev, conn_param->qpn);
+ if (!ep->com.qp) {
+ PDBG("%s qpn 0x%x not found!\n", __func__, conn_param->qpn);
+ err = -EINVAL;
+ goto fail1;
+ }
+ ref_qp(ep);
+ PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn,
+ ep->com.qp, cm_id);
+
+ /*
+ * Allocate an active TID to initiate a TCP connection.
+ */
+ ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep);
+ if (ep->atid == -1) {
+ printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__);
+ err = -ENOMEM;
+ goto fail1;
+ }
+ insert_handle(dev, &dev->atid_idr, ep, ep->atid);
+
+ memcpy(&ep->com.local_addr, &cm_id->local_addr,
+ sizeof(ep->com.local_addr));
+ memcpy(&ep->com.remote_addr, &cm_id->remote_addr,
+ sizeof(ep->com.remote_addr));
+
+ /* No port mapper available, go with the specified peer information */
+ memcpy(&ep->com.mapped_local_addr, &cm_id->local_addr,
+ sizeof(ep->com.mapped_local_addr));
+ memcpy(&ep->com.mapped_remote_addr, &cm_id->remote_addr,
+ sizeof(ep->com.mapped_remote_addr));
+
+ c4iw_form_reg_msg(dev, &pm_reg_msg);
+ iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_C4IW);
+ if (iwpm_err) {
+ PDBG("%s: Port Mapper reg pid fail (err = %d).\n",
+ __func__, iwpm_err);
+ }
+ if (iwpm_valid_pid() && !iwpm_err) {
+ c4iw_form_pm_msg(ep, &pm_msg);
+ iwpm_err = iwpm_add_and_query_mapping(&pm_msg, RDMA_NL_C4IW);
+ if (iwpm_err)
+ PDBG("%s: Port Mapper query fail (err = %d).\n",
+ __func__, iwpm_err);
+ else
+ c4iw_record_pm_msg(ep, &pm_msg);
+ }
+ if (iwpm_create_mapinfo(&ep->com.local_addr,
+ &ep->com.mapped_local_addr, RDMA_NL_C4IW)) {
+ iwpm_remove_mapping(&ep->com.local_addr, RDMA_NL_C4IW);
+ err = -ENOMEM;
+ goto fail1;
+ }
+ print_addr(&ep->com, __func__, "add_query/create_mapinfo");
+ set_bit(RELEASE_MAPINFO, &ep->com.flags);
+
+ laddr = (struct sockaddr_in *)&ep->com.mapped_local_addr;
+ raddr = (struct sockaddr_in *)&ep->com.mapped_remote_addr;
+ laddr6 = (struct sockaddr_in6 *)&ep->com.mapped_local_addr;
+ raddr6 = (struct sockaddr_in6 *) &ep->com.mapped_remote_addr;
+
+ if (cm_id->remote_addr.ss_family == AF_INET) {
+ iptype = 4;
+ ra = (__u8 *)&raddr->sin_addr;
+
+ /*
+ * Handle loopback requests to INADDR_ANY.
+ */
+ if ((__force int)raddr->sin_addr.s_addr == INADDR_ANY) {
+ err = pick_local_ipaddrs(dev, cm_id);
+ if (err)
+ goto fail1;
+ }
+
+ /* find a route */
+ PDBG("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n",
+ __func__, &laddr->sin_addr, ntohs(laddr->sin_port),
+ ra, ntohs(raddr->sin_port));
+ ep->dst = find_route(dev, laddr->sin_addr.s_addr,
+ raddr->sin_addr.s_addr, laddr->sin_port,
+ raddr->sin_port, 0);
+ } else {
+ iptype = 6;
+ ra = (__u8 *)&raddr6->sin6_addr;
+
+ /*
+ * Handle loopback requests to INADDR_ANY.
+ */
+ if (ipv6_addr_type(&raddr6->sin6_addr) == IPV6_ADDR_ANY) {
+ err = pick_local_ip6addrs(dev, cm_id);
+ if (err)
+ goto fail1;
+ }
+
+ /* find a route */
+ PDBG("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n",
+ __func__, laddr6->sin6_addr.s6_addr,
+ ntohs(laddr6->sin6_port),
+ raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port));
+ ep->dst = find_route6(dev, laddr6->sin6_addr.s6_addr,
+ raddr6->sin6_addr.s6_addr,
+ laddr6->sin6_port, raddr6->sin6_port, 0,
+ raddr6->sin6_scope_id);
+ }
+ if (!ep->dst) {
+ printk(KERN_ERR MOD "%s - cannot find route.\n", __func__);
+ err = -EHOSTUNREACH;
+ goto fail2;
+ }
+
+ err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, true);
+ if (err) {
+ printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__);
+ goto fail3;
+ }
+
+ PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n",
+ __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid,
+ ep->l2t->idx);
+
+ state_set(&ep->com, CONNECTING);
+ ep->tos = 0;
+
+ /* send connect request to rnic */
+ err = send_connect(ep);
+ if (!err)
+ goto out;
+
+ cxgb4_l2t_release(ep->l2t);
+fail3:
+ dst_release(ep->dst);
+fail2:
+ remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid);
+ cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid);
+fail1:
+ cm_id->rem_ref(cm_id);
+ c4iw_put_ep(&ep->com);
+out:
+ return err;
+}
+
+static int create_server6(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
+{
+ int err;
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)
+ &ep->com.mapped_local_addr;
+
+ c4iw_init_wr_wait(&ep->com.wr_wait);
+ err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0],
+ ep->stid, &sin6->sin6_addr,
+ sin6->sin6_port,
+ ep->com.dev->rdev.lldi.rxq_ids[0]);
+ if (!err)
+ err = c4iw_wait_for_reply(&ep->com.dev->rdev,
+ &ep->com.wr_wait,
+ 0, 0, __func__);
+ else if (err > 0)
+ err = net_xmit_errno(err);
+ if (err)
+ pr_err("cxgb4_create_server6/filter failed err %d stid %d laddr %pI6 lport %d\n",
+ err, ep->stid,
+ sin6->sin6_addr.s6_addr, ntohs(sin6->sin6_port));
+ return err;
+}
+
+static int create_server4(struct c4iw_dev *dev, struct c4iw_listen_ep *ep)
+{
+ int err;
+ struct sockaddr_in *sin = (struct sockaddr_in *)
+ &ep->com.mapped_local_addr;
+
+ if (dev->rdev.lldi.enable_fw_ofld_conn) {
+ do {
+ err = cxgb4_create_server_filter(
+ ep->com.dev->rdev.lldi.ports[0], ep->stid,
+ sin->sin_addr.s_addr, sin->sin_port, 0,
+ ep->com.dev->rdev.lldi.rxq_ids[0], 0, 0);
+ if (err == -EBUSY) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(usecs_to_jiffies(100));
+ }
+ } while (err == -EBUSY);
+ } else {
+ c4iw_init_wr_wait(&ep->com.wr_wait);
+ err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0],
+ ep->stid, sin->sin_addr.s_addr, sin->sin_port,
+ 0, ep->com.dev->rdev.lldi.rxq_ids[0]);
+ if (!err)
+ err = c4iw_wait_for_reply(&ep->com.dev->rdev,
+ &ep->com.wr_wait,
+ 0, 0, __func__);
+ else if (err > 0)
+ err = net_xmit_errno(err);
+ }
+ if (err)
+ pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n"
+ , err, ep->stid,
+ &sin->sin_addr, ntohs(sin->sin_port));
+ return err;
+}
+
+int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog)
+{
+ int err = 0;
+ struct c4iw_dev *dev = to_c4iw_dev(cm_id->device);
+ struct c4iw_listen_ep *ep;
+ struct iwpm_dev_data pm_reg_msg;
+ struct iwpm_sa_data pm_msg;
+ int iwpm_err = 0;
+
+ might_sleep();
+
+ ep = alloc_ep(sizeof(*ep), GFP_KERNEL);
+ if (!ep) {
+ printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__);
+ err = -ENOMEM;
+ goto fail1;
+ }
+ PDBG("%s ep %p\n", __func__, ep);
+ cm_id->add_ref(cm_id);
+ ep->com.cm_id = cm_id;
+ ep->com.dev = dev;
+ ep->backlog = backlog;
+ memcpy(&ep->com.local_addr, &cm_id->local_addr,
+ sizeof(ep->com.local_addr));
+
+ /*
+ * Allocate a server TID.
+ */
+ if (dev->rdev.lldi.enable_fw_ofld_conn &&
+ ep->com.local_addr.ss_family == AF_INET)
+ ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids,
+ cm_id->local_addr.ss_family, ep);
+ else
+ ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids,
+ cm_id->local_addr.ss_family, ep);
+
+ if (ep->stid == -1) {
+ printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__);
+ err = -ENOMEM;
+ goto fail2;
+ }
+ insert_handle(dev, &dev->stid_idr, ep, ep->stid);
+
+ /* No port mapper available, go with the specified info */
+ memcpy(&ep->com.mapped_local_addr, &cm_id->local_addr,
+ sizeof(ep->com.mapped_local_addr));
+
+ c4iw_form_reg_msg(dev, &pm_reg_msg);
+ iwpm_err = iwpm_register_pid(&pm_reg_msg, RDMA_NL_C4IW);
+ if (iwpm_err) {
+ PDBG("%s: Port Mapper reg pid fail (err = %d).\n",
+ __func__, iwpm_err);
+ }
+ if (iwpm_valid_pid() && !iwpm_err) {
+ memcpy(&pm_msg.loc_addr, &ep->com.local_addr,
+ sizeof(ep->com.local_addr));
+ iwpm_err = iwpm_add_mapping(&pm_msg, RDMA_NL_C4IW);
+ if (iwpm_err)
+ PDBG("%s: Port Mapper query fail (err = %d).\n",
+ __func__, iwpm_err);
+ else
+ memcpy(&ep->com.mapped_local_addr,
+ &pm_msg.mapped_loc_addr,
+ sizeof(ep->com.mapped_local_addr));
+ }
+ if (iwpm_create_mapinfo(&ep->com.local_addr,
+ &ep->com.mapped_local_addr, RDMA_NL_C4IW)) {
+ err = -ENOMEM;
+ goto fail3;
+ }
+ print_addr(&ep->com, __func__, "add_mapping/create_mapinfo");
+
+ set_bit(RELEASE_MAPINFO, &ep->com.flags);
+ state_set(&ep->com, LISTEN);
+ if (ep->com.local_addr.ss_family == AF_INET)
+ err = create_server4(dev, ep);
+ else
+ err = create_server6(dev, ep);
+ if (!err) {
+ cm_id->provider_data = ep;
+ goto out;
+ }
+
+fail3:
+ cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
+ ep->com.local_addr.ss_family);
+fail2:
+ cm_id->rem_ref(cm_id);
+ c4iw_put_ep(&ep->com);
+fail1:
+out:
+ return err;
+}
+
+int c4iw_destroy_listen(struct iw_cm_id *cm_id)
+{
+ int err;
+ struct c4iw_listen_ep *ep = to_listen_ep(cm_id);
+
+ PDBG("%s ep %p\n", __func__, ep);
+
+ might_sleep();
+ state_set(&ep->com, DEAD);
+ if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn &&
+ ep->com.local_addr.ss_family == AF_INET) {
+ err = cxgb4_remove_server_filter(
+ ep->com.dev->rdev.lldi.ports[0], ep->stid,
+ ep->com.dev->rdev.lldi.rxq_ids[0], 0);
+ } else {
+ c4iw_init_wr_wait(&ep->com.wr_wait);
+ err = cxgb4_remove_server(
+ ep->com.dev->rdev.lldi.ports[0], ep->stid,
+ ep->com.dev->rdev.lldi.rxq_ids[0], 0);
+ if (err)
+ goto done;
+ err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait,
+ 0, 0, __func__);
+ }
+ remove_handle(ep->com.dev, &ep->com.dev->stid_idr, ep->stid);
+ cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid,
+ ep->com.local_addr.ss_family);
+done:
+ cm_id->rem_ref(cm_id);
+ c4iw_put_ep(&ep->com);
+ return err;
+}
+
+int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp)
+{
+ int ret = 0;
+ int close = 0;
+ int fatal = 0;
+ struct c4iw_rdev *rdev;
+
+ mutex_lock(&ep->com.mutex);
+
+ PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep,
+ states[ep->com.state], abrupt);
+
+ rdev = &ep->com.dev->rdev;
+ if (c4iw_fatal_error(rdev)) {
+ fatal = 1;
+ close_complete_upcall(ep, -EIO);
+ ep->com.state = DEAD;
+ }
+ switch (ep->com.state) {
+ case MPA_REQ_WAIT:
+ case MPA_REQ_SENT:
+ case MPA_REQ_RCVD:
+ case MPA_REP_SENT:
+ case FPDU_MODE:
+ close = 1;
+ if (abrupt)
+ ep->com.state = ABORTING;
+ else {
+ ep->com.state = CLOSING;
+ start_ep_timer(ep);
+ }
+ set_bit(CLOSE_SENT, &ep->com.flags);
+ break;
+ case CLOSING:
+ if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) {
+ close = 1;
+ if (abrupt) {
+ (void)stop_ep_timer(ep);
+ ep->com.state = ABORTING;
+ } else
+ ep->com.state = MORIBUND;
+ }
+ break;
+ case MORIBUND:
+ case ABORTING:
+ case DEAD:
+ PDBG("%s ignoring disconnect ep %p state %u\n",
+ __func__, ep, ep->com.state);
+ break;
+ default:
+ BUG();
+ break;
+ }
+
+ if (close) {
+ if (abrupt) {
+ set_bit(EP_DISC_ABORT, &ep->com.history);
+ close_complete_upcall(ep, -ECONNRESET);
+ ret = send_abort(ep, NULL, gfp);
+ } else {
+ set_bit(EP_DISC_CLOSE, &ep->com.history);
+ ret = send_halfclose(ep, gfp);
+ }
+ if (ret)
+ fatal = 1;
+ }
+ mutex_unlock(&ep->com.mutex);
+ if (fatal)
+ release_ep_resources(ep);
+ return ret;
+}
+
+static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
+ struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
+{
+ struct c4iw_ep *ep;
+ int atid = be32_to_cpu(req->tid);
+
+ ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids,
+ (__force u32) req->tid);
+ if (!ep)
+ return;
+
+ switch (req->retval) {
+ case FW_ENOMEM:
+ set_bit(ACT_RETRY_NOMEM, &ep->com.history);
+ if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
+ send_fw_act_open_req(ep, atid);
+ return;
+ }
+ case FW_EADDRINUSE:
+ set_bit(ACT_RETRY_INUSE, &ep->com.history);
+ if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
+ send_fw_act_open_req(ep, atid);
+ return;
+ }
+ break;
+ default:
+ pr_info("%s unexpected ofld conn wr retval %d\n",
+ __func__, req->retval);
+ break;
+ }
+ pr_err("active ofld_connect_wr failure %d atid %d\n",
+ req->retval, atid);
+ mutex_lock(&dev->rdev.stats.lock);
+ dev->rdev.stats.act_ofld_conn_fails++;
+ mutex_unlock(&dev->rdev.stats.lock);
+ connect_reply_upcall(ep, status2errno(req->retval));
+ state_set(&ep->com, DEAD);
+ remove_handle(dev, &dev->atid_idr, atid);
+ cxgb4_free_atid(dev->rdev.lldi.tids, atid);
+ dst_release(ep->dst);
+ cxgb4_l2t_release(ep->l2t);
+ c4iw_put_ep(&ep->com);
+}
+
+static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
+ struct cpl_fw6_msg_ofld_connection_wr_rpl *req)
+{
+ struct sk_buff *rpl_skb;
+ struct cpl_pass_accept_req *cpl;
+ int ret;
+
+ rpl_skb = (struct sk_buff *)(unsigned long)req->cookie;
+ BUG_ON(!rpl_skb);
+ if (req->retval) {
+ PDBG("%s passive open failure %d\n", __func__, req->retval);
+ mutex_lock(&dev->rdev.stats.lock);
+ dev->rdev.stats.pas_ofld_conn_fails++;
+ mutex_unlock(&dev->rdev.stats.lock);
+ kfree_skb(rpl_skb);
+ } else {
+ cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb);
+ OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ,
+ (__force u32) htonl(
+ (__force u32) req->tid)));
+ ret = pass_accept_req(dev, rpl_skb);
+ if (!ret)
+ kfree_skb(rpl_skb);
+ }
+ return;
+}
+
+static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_fw6_msg *rpl = cplhdr(skb);
+ struct cpl_fw6_msg_ofld_connection_wr_rpl *req;
+
+ switch (rpl->type) {
+ case FW6_TYPE_CQE:
+ c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]);
+ break;
+ case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
+ req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data;
+ switch (req->t_state) {
+ case TCP_SYN_SENT:
+ active_ofld_conn_reply(dev, skb, req);
+ break;
+ case TCP_SYN_RECV:
+ passive_ofld_conn_reply(dev, skb, req);
+ break;
+ default:
+ pr_err("%s unexpected ofld conn wr state %d\n",
+ __func__, req->t_state);
+ break;
+ }
+ break;
+ }
+ return 0;
+}
+
+static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos)
+{
+ u32 l2info;
+ u16 vlantag, len, hdr_len, eth_hdr_len;
+ u8 intf;
+ struct cpl_rx_pkt *cpl = cplhdr(skb);
+ struct cpl_pass_accept_req *req;
+ struct tcp_options_received tmp_opt;
+ struct c4iw_dev *dev;
+
+ dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
+ /* Store values from cpl_rx_pkt in temporary location. */
+ vlantag = (__force u16) cpl->vlan;
+ len = (__force u16) cpl->len;
+ l2info = (__force u32) cpl->l2info;
+ hdr_len = (__force u16) cpl->hdr_len;
+ intf = cpl->iff;
+
+ __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header));
+
+ /*
+ * We need to parse the TCP options from SYN packet.
+ * to generate cpl_pass_accept_req.
+ */
+ memset(&tmp_opt, 0, sizeof(tmp_opt));
+ tcp_clear_options(&tmp_opt);
+ tcp_parse_options(skb, &tmp_opt, 0, NULL);
+
+ req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
+ memset(req, 0, sizeof(*req));
+ req->l2info = cpu_to_be16(SYN_INTF_V(intf) |
+ SYN_MAC_IDX_V(RX_MACIDX_G(
+ (__force int) htonl(l2info))) |
+ SYN_XACT_MATCH_F);
+ eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
+ RX_ETHHDR_LEN_G((__force int)htonl(l2info)) :
+ RX_T5_ETHHDR_LEN_G((__force int)htonl(l2info));
+ req->hdr_len = cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(
+ (__force int) htonl(l2info))) |
+ TCP_HDR_LEN_V(RX_TCPHDR_LEN_G(
+ (__force int) htons(hdr_len))) |
+ IP_HDR_LEN_V(RX_IPHDR_LEN_G(
+ (__force int) htons(hdr_len))) |
+ ETH_HDR_LEN_V(RX_ETHHDR_LEN_G(eth_hdr_len)));
+ req->vlan = (__force __be16) vlantag;
+ req->len = (__force __be16) len;
+ req->tos_stid = cpu_to_be32(PASS_OPEN_TID_V(stid) |
+ PASS_OPEN_TOS_V(tos));
+ req->tcpopt.mss = htons(tmp_opt.mss_clamp);
+ if (tmp_opt.wscale_ok)
+ req->tcpopt.wsf = tmp_opt.snd_wscale;
+ req->tcpopt.tstamp = tmp_opt.saw_tstamp;
+ if (tmp_opt.sack_ok)
+ req->tcpopt.sack = 1;
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0));
+ return;
+}
+
+static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb,
+ __be32 laddr, __be16 lport,
+ __be32 raddr, __be16 rport,
+ u32 rcv_isn, u32 filter, u16 window,
+ u32 rss_qid, u8 port_id)
+{
+ struct sk_buff *req_skb;
+ struct fw_ofld_connection_wr *req;
+ struct cpl_pass_accept_req *cpl = cplhdr(skb);
+ int ret;
+
+ req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
+ req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
+ memset(req, 0, sizeof(*req));
+ req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
+ req->len16_pkd = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*req), 16)));
+ req->le.version_cpl = htonl(FW_OFLD_CONNECTION_WR_CPL_F);
+ req->le.filter = (__force __be32) filter;
+ req->le.lport = lport;
+ req->le.pport = rport;
+ req->le.u.ipv4.lip = laddr;
+ req->le.u.ipv4.pip = raddr;
+ req->tcb.rcv_nxt = htonl(rcv_isn + 1);
+ req->tcb.rcv_adv = htons(window);
+ req->tcb.t_state_to_astid =
+ htonl(FW_OFLD_CONNECTION_WR_T_STATE_V(TCP_SYN_RECV) |
+ FW_OFLD_CONNECTION_WR_RCV_SCALE_V(cpl->tcpopt.wsf) |
+ FW_OFLD_CONNECTION_WR_ASTID_V(
+ PASS_OPEN_TID_G(ntohl(cpl->tos_stid))));
+
+ /*
+ * We store the qid in opt2 which will be used by the firmware
+ * to send us the wr response.
+ */
+ req->tcb.opt2 = htonl(RSS_QUEUE_V(rss_qid));
+
+ /*
+ * We initialize the MSS index in TCB to 0xF.
+ * So that when driver sends cpl_pass_accept_rpl
+ * TCB picks up the correct value. If this was 0
+ * TP will ignore any value > 0 for MSS index.
+ */
+ req->tcb.opt0 = cpu_to_be64(MSS_IDX_V(0xF));
+ req->cookie = (uintptr_t)skb;
+
+ set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id);
+ ret = cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb);
+ if (ret < 0) {
+ pr_err("%s - cxgb4_ofld_send error %d - dropping\n", __func__,
+ ret);
+ kfree_skb(skb);
+ kfree_skb(req_skb);
+ }
+}
+
+/*
+ * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt
+ * messages when a filter is being used instead of server to
+ * redirect a syn packet. When packets hit filter they are redirected
+ * to the offload queue and driver tries to establish the connection
+ * using firmware work request.
+ */
+static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ int stid;
+ unsigned int filter;
+ struct ethhdr *eh = NULL;
+ struct vlan_ethhdr *vlan_eh = NULL;
+ struct iphdr *iph;
+ struct tcphdr *tcph;
+ struct rss_header *rss = (void *)skb->data;
+ struct cpl_rx_pkt *cpl = (void *)skb->data;
+ struct cpl_pass_accept_req *req = (void *)(rss + 1);
+ struct l2t_entry *e;
+ struct dst_entry *dst;
+ struct c4iw_ep *lep;
+ u16 window;
+ struct port_info *pi;
+ struct net_device *pdev;
+ u16 rss_qid, eth_hdr_len;
+ int step;
+ u32 tx_chan;
+ struct neighbour *neigh;
+
+ /* Drop all non-SYN packets */
+ if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F)))
+ goto reject;
+
+ /*
+ * Drop all packets which did not hit the filter.
+ * Unlikely to happen.
+ */
+ if (!(rss->filter_hit && rss->filter_tid))
+ goto reject;
+
+ /*
+ * Calculate the server tid from filter hit index from cpl_rx_pkt.
+ */
+ stid = (__force int) cpu_to_be32((__force u32) rss->hash_val);
+
+ lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid);
+ if (!lep) {
+ PDBG("%s connect request on invalid stid %d\n", __func__, stid);
+ goto reject;
+ }
+
+ eth_hdr_len = is_t4(dev->rdev.lldi.adapter_type) ?
+ RX_ETHHDR_LEN_G(htonl(cpl->l2info)) :
+ RX_T5_ETHHDR_LEN_G(htonl(cpl->l2info));
+ if (eth_hdr_len == ETH_HLEN) {
+ eh = (struct ethhdr *)(req + 1);
+ iph = (struct iphdr *)(eh + 1);
+ } else {
+ vlan_eh = (struct vlan_ethhdr *)(req + 1);
+ iph = (struct iphdr *)(vlan_eh + 1);
+ skb->vlan_tci = ntohs(cpl->vlan);
+ }
+
+ if (iph->version != 0x4)
+ goto reject;
+
+ tcph = (struct tcphdr *)(iph + 1);
+ skb_set_network_header(skb, (void *)iph - (void *)rss);
+ skb_set_transport_header(skb, (void *)tcph - (void *)rss);
+ skb_get(skb);
+
+ PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__,
+ ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr),
+ ntohs(tcph->source), iph->tos);
+
+ dst = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source,
+ iph->tos);
+ if (!dst) {
+ pr_err("%s - failed to find dst entry!\n",
+ __func__);
+ goto reject;
+ }
+ neigh = dst_neigh_lookup_skb(dst, skb);
+
+ if (!neigh) {
+ pr_err("%s - failed to allocate neigh!\n",
+ __func__);
+ goto free_dst;
+ }
+
+ if (neigh->dev->flags & IFF_LOOPBACK) {
+ pdev = ip_dev_find(&init_net, iph->daddr);
+ e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
+ pdev, 0);
+ pi = (struct port_info *)netdev_priv(pdev);
+ tx_chan = cxgb4_port_chan(pdev);
+ dev_put(pdev);
+ } else {
+ pdev = get_real_dev(neigh->dev);
+ e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh,
+ pdev, 0);
+ pi = (struct port_info *)netdev_priv(pdev);
+ tx_chan = cxgb4_port_chan(pdev);
+ }
+ neigh_release(neigh);
+ if (!e) {
+ pr_err("%s - failed to allocate l2t entry!\n",
+ __func__);
+ goto free_dst;
+ }
+
+ step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan;
+ rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step];
+ window = (__force u16) htons((__force u16)tcph->window);
+
+ /* Calcuate filter portion for LE region. */
+ filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple(
+ dev->rdev.lldi.ports[0],
+ e));
+
+ /*
+ * Synthesize the cpl_pass_accept_req. We have everything except the
+ * TID. Once firmware sends a reply with TID we update the TID field
+ * in cpl and pass it through the regular cpl_pass_accept_req path.
+ */
+ build_cpl_pass_accept_req(skb, stid, iph->tos);
+ send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr,
+ tcph->source, ntohl(tcph->seq), filter, window,
+ rss_qid, pi->port_id);
+ cxgb4_l2t_release(e);
+free_dst:
+ dst_release(dst);
+reject:
+ return 0;
+}
+
+/*
+ * These are the real handlers that are called from a
+ * work queue.
+ */
+static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = {
+ [CPL_ACT_ESTABLISH] = act_establish,
+ [CPL_ACT_OPEN_RPL] = act_open_rpl,
+ [CPL_RX_DATA] = rx_data,
+ [CPL_ABORT_RPL_RSS] = abort_rpl,
+ [CPL_ABORT_RPL] = abort_rpl,
+ [CPL_PASS_OPEN_RPL] = pass_open_rpl,
+ [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl,
+ [CPL_PASS_ACCEPT_REQ] = pass_accept_req,
+ [CPL_PASS_ESTABLISH] = pass_establish,
+ [CPL_PEER_CLOSE] = peer_close,
+ [CPL_ABORT_REQ_RSS] = peer_abort,
+ [CPL_CLOSE_CON_RPL] = close_con_rpl,
+ [CPL_RDMA_TERMINATE] = terminate,
+ [CPL_FW4_ACK] = fw4_ack,
+ [CPL_FW6_MSG] = deferred_fw6_msg,
+ [CPL_RX_PKT] = rx_pkt
+};
+
+static void process_timeout(struct c4iw_ep *ep)
+{
+ struct c4iw_qp_attributes attrs;
+ int abort = 1;
+
+ mutex_lock(&ep->com.mutex);
+ PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid,
+ ep->com.state);
+ set_bit(TIMEDOUT, &ep->com.history);
+ switch (ep->com.state) {
+ case MPA_REQ_SENT:
+ __state_set(&ep->com, ABORTING);
+ connect_reply_upcall(ep, -ETIMEDOUT);
+ break;
+ case MPA_REQ_WAIT:
+ __state_set(&ep->com, ABORTING);
+ break;
+ case CLOSING:
+ case MORIBUND:
+ if (ep->com.cm_id && ep->com.qp) {
+ attrs.next_state = C4IW_QP_STATE_ERROR;
+ c4iw_modify_qp(ep->com.qp->rhp,
+ ep->com.qp, C4IW_QP_ATTR_NEXT_STATE,
+ &attrs, 1);
+ }
+ __state_set(&ep->com, ABORTING);
+ close_complete_upcall(ep, -ETIMEDOUT);
+ break;
+ case ABORTING:
+ case DEAD:
+
+ /*
+ * These states are expected if the ep timed out at the same
+ * time as another thread was calling stop_ep_timer().
+ * So we silently do nothing for these states.
+ */
+ abort = 0;
+ break;
+ default:
+ WARN(1, "%s unexpected state ep %p tid %u state %u\n",
+ __func__, ep, ep->hwtid, ep->com.state);
+ abort = 0;
+ }
+ if (abort)
+ abort_connection(ep, NULL, GFP_KERNEL);
+ mutex_unlock(&ep->com.mutex);
+ c4iw_put_ep(&ep->com);
+}
+
+static void process_timedout_eps(void)
+{
+ struct c4iw_ep *ep;
+
+ spin_lock_irq(&timeout_lock);
+ while (!list_empty(&timeout_list)) {
+ struct list_head *tmp;
+
+ tmp = timeout_list.next;
+ list_del(tmp);
+ tmp->next = NULL;
+ tmp->prev = NULL;
+ spin_unlock_irq(&timeout_lock);
+ ep = list_entry(tmp, struct c4iw_ep, entry);
+ process_timeout(ep);
+ spin_lock_irq(&timeout_lock);
+ }
+ spin_unlock_irq(&timeout_lock);
+}
+
+static void process_work(struct work_struct *work)
+{
+ struct sk_buff *skb = NULL;
+ struct c4iw_dev *dev;
+ struct cpl_act_establish *rpl;
+ unsigned int opcode;
+ int ret;
+
+ process_timedout_eps();
+ while ((skb = skb_dequeue(&rxq))) {
+ rpl = cplhdr(skb);
+ dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *)));
+ opcode = rpl->ot.opcode;
+
+ BUG_ON(!work_handlers[opcode]);
+ ret = work_handlers[opcode](dev, skb);
+ if (!ret)
+ kfree_skb(skb);
+ process_timedout_eps();
+ }
+}
+
+static DECLARE_WORK(skb_work, process_work);
+
+static void ep_timeout(unsigned long arg)
+{
+ struct c4iw_ep *ep = (struct c4iw_ep *)arg;
+ int kickit = 0;
+
+ spin_lock(&timeout_lock);
+ if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) {
+ /*
+ * Only insert if it is not already on the list.
+ */
+ if (!ep->entry.next) {
+ list_add_tail(&ep->entry, &timeout_list);
+ kickit = 1;
+ }
+ }
+ spin_unlock(&timeout_lock);
+ if (kickit)
+ queue_work(workq, &skb_work);
+}
+
+/*
+ * All the CM events are handled on a work queue to have a safe context.
+ */
+static int sched(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+
+ /*
+ * Save dev in the skb->cb area.
+ */
+ *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev;
+
+ /*
+ * Queue the skb and schedule the worker thread.
+ */
+ skb_queue_tail(&rxq, skb);
+ queue_work(workq, &skb_work);
+ return 0;
+}
+
+static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_set_tcb_rpl *rpl = cplhdr(skb);
+
+ if (rpl->status != CPL_ERR_NONE) {
+ printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u "
+ "for tid %u\n", rpl->status, GET_TID(rpl));
+ }
+ kfree_skb(skb);
+ return 0;
+}
+
+static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_fw6_msg *rpl = cplhdr(skb);
+ struct c4iw_wr_wait *wr_waitp;
+ int ret;
+
+ PDBG("%s type %u\n", __func__, rpl->type);
+
+ switch (rpl->type) {
+ case FW6_TYPE_WR_RPL:
+ ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff);
+ wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1];
+ PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret);
+ if (wr_waitp)
+ c4iw_wake_up(wr_waitp, ret ? -ret : 0);
+ kfree_skb(skb);
+ break;
+ case FW6_TYPE_CQE:
+ case FW6_TYPE_OFLD_CONNECTION_WR_RPL:
+ sched(dev, skb);
+ break;
+ default:
+ printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__,
+ rpl->type);
+ kfree_skb(skb);
+ break;
+ }
+ return 0;
+}
+
+static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct cpl_abort_req_rss *req = cplhdr(skb);
+ struct c4iw_ep *ep;
+ struct tid_info *t = dev->rdev.lldi.tids;
+ unsigned int tid = GET_TID(req);
+
+ ep = lookup_tid(t, tid);
+ if (!ep) {
+ printk(KERN_WARNING MOD
+ "Abort on non-existent endpoint, tid %d\n", tid);
+ kfree_skb(skb);
+ return 0;
+ }
+ if (is_neg_adv(req->status)) {
+ PDBG("%s Negative advice on abort- tid %u status %d (%s)\n",
+ __func__, ep->hwtid, req->status,
+ neg_adv_str(req->status));
+ ep->stats.abort_neg_adv++;
+ dev->rdev.stats.neg_adv++;
+ kfree_skb(skb);
+ return 0;
+ }
+ PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid,
+ ep->com.state);
+
+ /*
+ * Wake up any threads in rdma_init() or rdma_fini().
+ * However, if we are on MPAv2 and want to retry with MPAv1
+ * then, don't wake up yet.
+ */
+ if (mpa_rev == 2 && !ep->tried_with_mpa_v1) {
+ if (ep->com.state != MPA_REQ_SENT)
+ c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
+ } else
+ c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET);
+ sched(dev, skb);
+ return 0;
+}
+
+/*
+ * Most upcalls from the T4 Core go to sched() to
+ * schedule the processing on a work queue.
+ */
+c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = {
+ [CPL_ACT_ESTABLISH] = sched,
+ [CPL_ACT_OPEN_RPL] = sched,
+ [CPL_RX_DATA] = sched,
+ [CPL_ABORT_RPL_RSS] = sched,
+ [CPL_ABORT_RPL] = sched,
+ [CPL_PASS_OPEN_RPL] = sched,
+ [CPL_CLOSE_LISTSRV_RPL] = sched,
+ [CPL_PASS_ACCEPT_REQ] = sched,
+ [CPL_PASS_ESTABLISH] = sched,
+ [CPL_PEER_CLOSE] = sched,
+ [CPL_CLOSE_CON_RPL] = sched,
+ [CPL_ABORT_REQ_RSS] = peer_abort_intr,
+ [CPL_RDMA_TERMINATE] = sched,
+ [CPL_FW4_ACK] = sched,
+ [CPL_SET_TCB_RPL] = set_tcb_rpl,
+ [CPL_FW6_MSG] = fw6_msg,
+ [CPL_RX_PKT] = sched
+};
+
+int __init c4iw_cm_init(void)
+{
+ spin_lock_init(&timeout_lock);
+ skb_queue_head_init(&rxq);
+
+ workq = create_singlethread_workqueue("iw_cxgb4");
+ if (!workq)
+ return -ENOMEM;
+
+ return 0;
+}
+
+void c4iw_cm_term(void)
+{
+ WARN_ON(!list_empty(&timeout_list));
+ flush_workqueue(workq);
+ destroy_workqueue(workq);
+}
Code Review / kvmfornfv.git / blobdiff