diff options
Diffstat (limited to 'drivers/infiniband/hw/cxgb4/cm.c')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/cm.c | 4301 |
1 files changed, 4301 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c new file mode 100644 index 000000000..6c1a093b1 --- /dev/null +++ b/drivers/infiniband/hw/cxgb4/cm.c @@ -0,0 +1,4301 @@ +/* + * 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 <libcxgb_cm.h> +#include "iw_cxgb4.h" +#include "clip_tbl.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)"); + +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 = 2; +module_param(mpa_rev, int, 0644); +MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, " + "1 is RFC5044 spec compliant, 2 is IETF MPA Peer Connect Draft" + " compliant (default=2)"); + +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(struct timer_list *t); +static void connect_reply_upcall(struct c4iw_ep *ep, int status); +static int sched(struct c4iw_dev *dev, struct sk_buff *skb); + +static LIST_HEAD(timeout_list); +static spinlock_t timeout_lock; + +static void deref_cm_id(struct c4iw_ep_common *epc) +{ + epc->cm_id->rem_ref(epc->cm_id); + epc->cm_id = NULL; + set_bit(CM_ID_DEREFED, &epc->history); +} + +static void ref_cm_id(struct c4iw_ep_common *epc) +{ + set_bit(CM_ID_REFED, &epc->history); + epc->cm_id->add_ref(epc->cm_id); +} + +static void deref_qp(struct c4iw_ep *ep) +{ + c4iw_qp_rem_ref(&ep->com.qp->ibqp); + clear_bit(QP_REFERENCED, &ep->com.flags); + set_bit(QP_DEREFED, &ep->com.history); +} + +static void ref_qp(struct c4iw_ep *ep) +{ + set_bit(QP_REFERENCED, &ep->com.flags); + set_bit(QP_REFED, &ep->com.history); + c4iw_qp_add_ref(&ep->com.qp->ibqp); +} + +static void start_ep_timer(struct c4iw_ep *ep) +{ + pr_debug("ep %p\n", 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; + add_timer(&ep->timer); +} + +static int stop_ep_timer(struct c4iw_ep *ep) +{ + pr_debug("ep %p stopping\n", 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); + pr_err("%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); + else if (error == NET_XMIT_DROP) + return -ENOMEM; + 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); + pr_err("%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) +{ + u32 len = roundup(sizeof(struct cpl_tid_release), 16); + + skb = get_skb(skb, len, GFP_KERNEL); + if (!skb) + return; + + cxgb_mk_tid_release(skb, len, hwtid, 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) + pr_debug("Warning: misaligned mtu idx %u mss %u emss=%u\n", + TCPOPT_MSS_G(opt), ep->mss, ep->emss); + pr_debug("mss_idx %u mss %u emss=%u\n", 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); + pr_debug("%s -> %s\n", states[epc->state], states[new]); + __state_set(epc, new); + mutex_unlock(&epc->mutex); + return; +} + +static int alloc_ep_skb_list(struct sk_buff_head *ep_skb_list, int size) +{ + struct sk_buff *skb; + unsigned int i; + size_t len; + + len = roundup(sizeof(union cpl_wr_size), 16); + for (i = 0; i < size; i++) { + skb = alloc_skb(len, GFP_KERNEL); + if (!skb) + goto fail; + skb_queue_tail(ep_skb_list, skb); + } + return 0; +fail: + skb_queue_purge(ep_skb_list); + return -ENOMEM; +} + +static void *alloc_ep(int size, gfp_t gfp) +{ + struct c4iw_ep_common *epc; + + epc = kzalloc(size, gfp); + if (epc) { + epc->wr_waitp = c4iw_alloc_wr_wait(gfp); + if (!epc->wr_waitp) { + kfree(epc); + epc = NULL; + goto out; + } + kref_init(&epc->kref); + mutex_init(&epc->mutex); + c4iw_init_wr_wait(epc->wr_waitp); + } + pr_debug("alloc ep %p\n", epc); +out: + return epc; +} + +static void remove_ep_tid(struct c4iw_ep *ep) +{ + unsigned long flags; + + spin_lock_irqsave(&ep->com.dev->lock, flags); + _remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid, 0); + if (idr_is_empty(&ep->com.dev->hwtid_idr)) + wake_up(&ep->com.dev->wait); + spin_unlock_irqrestore(&ep->com.dev->lock, flags); +} + +static void insert_ep_tid(struct c4iw_ep *ep) +{ + unsigned long flags; + + spin_lock_irqsave(&ep->com.dev->lock, flags); + _insert_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep, ep->hwtid, 0); + spin_unlock_irqrestore(&ep->com.dev->lock, flags); +} + +/* + * Atomically lookup the ep ptr given the tid and grab a reference on the ep. + */ +static struct c4iw_ep *get_ep_from_tid(struct c4iw_dev *dev, unsigned int tid) +{ + struct c4iw_ep *ep; + unsigned long flags; + + spin_lock_irqsave(&dev->lock, flags); + ep = idr_find(&dev->hwtid_idr, tid); + if (ep) + c4iw_get_ep(&ep->com); + spin_unlock_irqrestore(&dev->lock, flags); + return ep; +} + +/* + * Atomically lookup the ep ptr given the stid and grab a reference on the ep. + */ +static struct c4iw_listen_ep *get_ep_from_stid(struct c4iw_dev *dev, + unsigned int stid) +{ + struct c4iw_listen_ep *ep; + unsigned long flags; + + spin_lock_irqsave(&dev->lock, flags); + ep = idr_find(&dev->stid_idr, stid); + if (ep) + c4iw_get_ep(&ep->com); + spin_unlock_irqrestore(&dev->lock, flags); + return ep; +} + +void _c4iw_free_ep(struct kref *kref) +{ + struct c4iw_ep *ep; + + ep = container_of(kref, struct c4iw_ep, com.kref); + pr_debug("ep %p state %s\n", ep, states[ep->com.state]); + if (test_bit(QP_REFERENCED, &ep->com.flags)) + deref_qp(ep); + if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) { + if (ep->com.remote_addr.ss_family == AF_INET6) { + struct sockaddr_in6 *sin6 = + (struct sockaddr_in6 *) + &ep->com.local_addr; + + cxgb4_clip_release( + ep->com.dev->rdev.lldi.ports[0], + (const u32 *)&sin6->sin6_addr.s6_addr, + 1); + } + cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid, + ep->com.local_addr.ss_family); + dst_release(ep->dst); + cxgb4_l2t_release(ep->l2t); + if (ep->mpa_skb) + kfree_skb(ep->mpa_skb); + } + if (!skb_queue_empty(&ep->com.ep_skb_list)) + skb_queue_purge(&ep->com.ep_skb_list); + c4iw_put_wr_wait(ep->com.wr_waitp); + kfree(ep); +} + +static void release_ep_resources(struct c4iw_ep *ep) +{ + set_bit(RELEASE_RESOURCES, &ep->com.flags); + + /* + * If we have a hwtid, then remove it from the idr table + * so lookups will no longer find this endpoint. Otherwise + * we have a race where one thread finds the ep ptr just + * before the other thread is freeing the ep memory. + */ + if (ep->hwtid != -1) + remove_ep_tid(ep); + 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); + if (!skb) + return NULL; + } + 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 void arp_failure_discard(void *handle, struct sk_buff *skb) +{ + pr_err("ARP failure\n"); + kfree_skb(skb); +} + +static void mpa_start_arp_failure(void *handle, struct sk_buff *skb) +{ + pr_err("ARP failure during MPA Negotiation - Closing Connection\n"); +} + +enum { + NUM_FAKE_CPLS = 2, + FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0, + FAKE_CPL_PASS_PUT_EP_SAFE = NUM_CPL_CMDS + 1, +}; + +static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb) +{ + struct c4iw_ep *ep; + + ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))); + release_ep_resources(ep); + return 0; +} + +static int _put_pass_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb) +{ + struct c4iw_ep *ep; + + ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))); + c4iw_put_ep(&ep->parent_ep->com); + release_ep_resources(ep); + return 0; +} + +/* + * Fake up a special CPL opcode and call sched() so process_work() will call + * _put_ep_safe() in a safe context to free the ep resources. This is needed + * because ARP error handlers are called in an ATOMIC context, and + * _c4iw_free_ep() needs to block. + */ +static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb, + int cpl) +{ + struct cpl_act_establish *rpl = cplhdr(skb); + + /* Set our special ARP_FAILURE opcode */ + rpl->ot.opcode = cpl; + + /* + * Save ep in the skb->cb area, after where sched() will save the dev + * ptr. + */ + *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep; + sched(ep->com.dev, skb); +} + +/* Handle an ARP failure for an accept */ +static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb) +{ + struct c4iw_ep *ep = handle; + + pr_err("ARP failure during accept - tid %u - dropping connection\n", + ep->hwtid); + + __state_set(&ep->com, DEAD); + queue_arp_failure_cpl(ep, skb, FAKE_CPL_PASS_PUT_EP_SAFE); +} + +/* + * 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; + + pr_err("ARP failure during connect\n"); + connect_reply_upcall(ep, -EHOSTUNREACH); + __state_set(&ep->com, DEAD); + if (ep->com.remote_addr.ss_family == AF_INET6) { + struct sockaddr_in6 *sin6 = + (struct sockaddr_in6 *)&ep->com.local_addr; + cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0], + (const u32 *)&sin6->sin6_addr.s6_addr, 1); + } + remove_handle(ep->com.dev, &ep->com.dev->atid_idr, ep->atid); + cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid); + queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE); +} + +/* + * 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) +{ + int ret; + struct c4iw_ep *ep = handle; + struct c4iw_rdev *rdev = &ep->com.dev->rdev; + struct cpl_abort_req *req = cplhdr(skb); + + pr_debug("rdev %p\n", rdev); + req->cmd = CPL_ABORT_NO_RST; + skb_get(skb); + ret = c4iw_ofld_send(rdev, skb); + if (ret) { + __state_set(&ep->com, DEAD); + queue_arp_failure_cpl(ep, skb, FAKE_CPL_PUT_EP_SAFE); + } else + kfree_skb(skb); +} + +static int send_flowc(struct c4iw_ep *ep) +{ + struct fw_flowc_wr *flowc; + struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list); + u16 vlan = ep->l2t->vlan; + int nparams; + int flowclen, flowclen16; + + if (WARN_ON(!skb)) + return -ENOMEM; + + if (vlan == CPL_L2T_VLAN_NONE) + nparams = 9; + else + nparams = 10; + + flowclen = offsetof(struct fw_flowc_wr, mnemval[nparams]); + flowclen16 = DIV_ROUND_UP(flowclen, 16); + flowclen = flowclen16 * 16; + + flowc = __skb_put(skb, flowclen); + memset(flowc, 0, flowclen); + + flowc->op_to_nparams = cpu_to_be32(FW_WR_OP_V(FW_FLOWC_WR) | + FW_FLOWC_WR_NPARAMS_V(nparams)); + flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16_V(flowclen16) | + 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); + flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_RCV_SCALE; + flowc->mnemval[8].val = cpu_to_be32(ep->snd_wscale); + if (nparams == 10) { + u16 pri; + pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; + flowc->mnemval[9].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS; + flowc->mnemval[9].val = cpu_to_be32(pri); + } + + set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); + return c4iw_ofld_send(&ep->com.dev->rdev, skb); +} + +static int send_halfclose(struct c4iw_ep *ep) +{ + struct sk_buff *skb = skb_dequeue(&ep->com.ep_skb_list); + u32 wrlen = roundup(sizeof(struct cpl_close_con_req), 16); + + pr_debug("ep %p tid %u\n", ep, ep->hwtid); + if (WARN_ON(!skb)) + return -ENOMEM; + + cxgb_mk_close_con_req(skb, wrlen, ep->hwtid, ep->txq_idx, + NULL, arp_failure_discard); + + return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); +} + +static int send_abort(struct c4iw_ep *ep) +{ + u32 wrlen = roundup(sizeof(struct cpl_abort_req), 16); + struct sk_buff *req_skb = skb_dequeue(&ep->com.ep_skb_list); + + pr_debug("ep %p tid %u\n", ep, ep->hwtid); + if (WARN_ON(!req_skb)) + return -ENOMEM; + + cxgb_mk_abort_req(req_skb, wrlen, ep->hwtid, ep->txq_idx, + ep, abort_arp_failure); + + return c4iw_l2t_send(&ep->com.dev->rdev, req_skb, ep->l2t); +} + +static int send_connect(struct c4iw_ep *ep) +{ + struct cpl_act_open_req *req = NULL; + struct cpl_t5_act_open_req *t5req = NULL; + struct cpl_t6_act_open_req *t6req = NULL; + struct cpl_act_open_req6 *req6 = NULL; + struct cpl_t5_act_open_req6 *t5req6 = NULL; + struct cpl_t6_act_open_req6 *t6req6 = NULL; + struct sk_buff *skb; + u64 opt0; + u32 opt2; + unsigned int mtu_idx; + u32 wscale; + int win, sizev4, sizev6, wrlen; + struct sockaddr_in *la = (struct sockaddr_in *) + &ep->com.local_addr; + struct sockaddr_in *ra = (struct sockaddr_in *) + &ep->com.remote_addr; + struct sockaddr_in6 *la6 = (struct sockaddr_in6 *) + &ep->com.local_addr; + struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *) + &ep->com.remote_addr; + int ret; + enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type; + u32 isn = (prandom_u32() & ~7UL) - 1; + struct net_device *netdev; + u64 params; + + netdev = ep->com.dev->rdev.lldi.ports[0]; + + switch (CHELSIO_CHIP_VERSION(adapter_type)) { + case CHELSIO_T4: + sizev4 = sizeof(struct cpl_act_open_req); + sizev6 = sizeof(struct cpl_act_open_req6); + break; + case CHELSIO_T5: + sizev4 = sizeof(struct cpl_t5_act_open_req); + sizev6 = sizeof(struct cpl_t5_act_open_req6); + break; + case CHELSIO_T6: + sizev4 = sizeof(struct cpl_t6_act_open_req); + sizev6 = sizeof(struct cpl_t6_act_open_req6); + break; + default: + pr_err("T%d Chip is not supported\n", + CHELSIO_CHIP_VERSION(adapter_type)); + return -EINVAL; + } + + wrlen = (ep->com.remote_addr.ss_family == AF_INET) ? + roundup(sizev4, 16) : + roundup(sizev6, 16); + + pr_debug("ep %p atid %u\n", ep, ep->atid); + + skb = get_skb(NULL, wrlen, GFP_KERNEL); + if (!skb) { + pr_err("%s - failed to alloc skb\n", __func__); + return -ENOMEM; + } + set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx); + + cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx, + enable_tcp_timestamps, + (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1); + wscale = cxgb_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) | + 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 (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) { + if (peer2peer) + isn += 4; + + opt2 |= T5_OPT_2_VALID_F; + opt2 |= CONG_CNTRL_V(CONG_ALG_TAHOE); + opt2 |= T5_ISS_F; + } + + params = cxgb4_select_ntuple(netdev, ep->l2t); + + if (ep->com.remote_addr.ss_family == AF_INET6) + cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0], + (const u32 *)&la6->sin6_addr.s6_addr, 1); + + t4_set_arp_err_handler(skb, ep, act_open_req_arp_failure); + + if (ep->com.remote_addr.ss_family == AF_INET) { + switch (CHELSIO_CHIP_VERSION(adapter_type)) { + case CHELSIO_T4: + req = skb_put(skb, wrlen); + INIT_TP_WR(req, 0); + break; + case CHELSIO_T5: + t5req = skb_put(skb, wrlen); + INIT_TP_WR(t5req, 0); + req = (struct cpl_act_open_req *)t5req; + break; + case CHELSIO_T6: + t6req = skb_put(skb, wrlen); + INIT_TP_WR(t6req, 0); + req = (struct cpl_act_open_req *)t6req; + t5req = (struct cpl_t5_act_open_req *)t6req; + break; + default: + pr_err("T%d Chip is not supported\n", + CHELSIO_CHIP_VERSION(adapter_type)); + ret = -EINVAL; + goto clip_release; + } + + 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); + + if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) { + req->params = cpu_to_be32(params); + req->opt2 = cpu_to_be32(opt2); + } else { + if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) { + t5req->params = + cpu_to_be64(FILTER_TUPLE_V(params)); + t5req->rsvd = cpu_to_be32(isn); + pr_debug("snd_isn %u\n", t5req->rsvd); + t5req->opt2 = cpu_to_be32(opt2); + } else { + t6req->params = + cpu_to_be64(FILTER_TUPLE_V(params)); + t6req->rsvd = cpu_to_be32(isn); + pr_debug("snd_isn %u\n", t6req->rsvd); + t6req->opt2 = cpu_to_be32(opt2); + } + } + } else { + switch (CHELSIO_CHIP_VERSION(adapter_type)) { + case CHELSIO_T4: + req6 = skb_put(skb, wrlen); + INIT_TP_WR(req6, 0); + break; + case CHELSIO_T5: + t5req6 = skb_put(skb, wrlen); + INIT_TP_WR(t5req6, 0); + req6 = (struct cpl_act_open_req6 *)t5req6; + break; + case CHELSIO_T6: + t6req6 = skb_put(skb, wrlen); + INIT_TP_WR(t6req6, 0); + req6 = (struct cpl_act_open_req6 *)t6req6; + t5req6 = (struct cpl_t5_act_open_req6 *)t6req6; + break; + default: + pr_err("T%d Chip is not supported\n", + CHELSIO_CHIP_VERSION(adapter_type)); + ret = -EINVAL; + goto clip_release; + } + + 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); + + if (is_t4(ep->com.dev->rdev.lldi.adapter_type)) { + req6->params = cpu_to_be32(cxgb4_select_ntuple(netdev, + ep->l2t)); + req6->opt2 = cpu_to_be32(opt2); + } else { + if (is_t5(ep->com.dev->rdev.lldi.adapter_type)) { + t5req6->params = + cpu_to_be64(FILTER_TUPLE_V(params)); + t5req6->rsvd = cpu_to_be32(isn); + pr_debug("snd_isn %u\n", t5req6->rsvd); + t5req6->opt2 = cpu_to_be32(opt2); + } else { + t6req6->params = + cpu_to_be64(FILTER_TUPLE_V(params)); + t6req6->rsvd = cpu_to_be32(isn); + pr_debug("snd_isn %u\n", t6req6->rsvd); + t6req6->opt2 = cpu_to_be32(opt2); + } + + } + } + + set_bit(ACT_OPEN_REQ, &ep->com.history); + ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); +clip_release: + if (ret && ep->com.remote_addr.ss_family == AF_INET6) + cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0], + (const u32 *)&la6->sin6_addr.s6_addr, 1); + return ret; +} + +static int send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb, + u8 mpa_rev_to_use) +{ + int mpalen, wrlen, ret; + struct fw_ofld_tx_data_wr *req; + struct mpa_message *mpa; + struct mpa_v2_conn_params mpa_v2_params; + + pr_debug("ep %p tid %u pd_len %d\n", + ep, ep->hwtid, ep->plen); + + 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 -ENOMEM; + } + set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); + + req = skb_put_zero(skb, 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 = 0; + if (crc_enabled) + mpa->flags |= MPA_CRC; + if (markers_enabled) { + mpa->flags |= MPA_MARKERS; + ep->mpa_attr.recv_marker_enabled = 1; + } else { + ep->mpa_attr.recv_marker_enabled = 0; + } + if (mpa_rev_to_use == 2) + mpa->flags |= MPA_ENHANCED_RDMA_CONN; + + 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)); + pr_debug("initiator ird %u ord %u\n", 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); + ep->mpa_skb = skb; + ret = c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); + if (ret) + return ret; + start_ep_timer(ep); + __state_set(&ep->com, MPA_REQ_SENT); + ep->mpa_attr.initiator = 1; + ep->snd_seq += mpalen; + return ret; +} + +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; + + pr_debug("ep %p tid %u pd_len %d\n", + 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) { + pr_err("%s - cannot alloc skb!\n", __func__); + return -ENOMEM; + } + set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); + + req = skb_put_zero(skb, 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, mpa_start_arp_failure); + 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; + + pr_debug("ep %p tid %u pd_len %d\n", + 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) { + pr_err("%s - cannot alloc skb!\n", __func__); + return -ENOMEM; + } + set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); + + req = skb_put_zero(skb, 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 = 0; + if (ep->mpa_attr.crc_enabled) + mpa->flags |= MPA_CRC; + if (ep->mpa_attr.recv_marker_enabled) + mpa->flags |= MPA_MARKERS; + 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, mpa_start_arp_failure); + 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 short tcp_opt = ntohs(req->tcp_opt); + unsigned int tid = GET_TID(req); + unsigned int atid = TID_TID_G(ntohl(req->tos_atid)); + struct tid_info *t = dev->rdev.lldi.tids; + int ret; + + ep = lookup_atid(t, atid); + + pr_debug("ep %p tid %u snd_isn %u rcv_isn %u\n", 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, ep->com.local_addr.ss_family); + insert_ep_tid(ep); + + ep->snd_seq = be32_to_cpu(req->snd_isn); + ep->rcv_seq = be32_to_cpu(req->rcv_isn); + ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt); + + set_emss(ep, 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 */ + ret = send_flowc(ep); + if (ret) + goto err; + if (ep->retry_with_mpa_v1) + ret = send_mpa_req(ep, skb, 1); + else + ret = send_mpa_req(ep, skb, mpa_rev); + if (ret) + goto err; + mutex_unlock(&ep->com.mutex); + return 0; +err: + mutex_unlock(&ep->com.mutex); + connect_reply_upcall(ep, -ENOMEM); + c4iw_ep_disconnect(ep, 0, GFP_KERNEL); + return 0; +} + +static void close_complete_upcall(struct c4iw_ep *ep, int status) +{ + struct iw_cm_event event; + + pr_debug("ep %p tid %u\n", ep, ep->hwtid); + memset(&event, 0, sizeof(event)); + event.event = IW_CM_EVENT_CLOSE; + event.status = status; + if (ep->com.cm_id) { + pr_debug("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); + deref_cm_id(&ep->com); + set_bit(CLOSE_UPCALL, &ep->com.history); + } +} + +static void peer_close_upcall(struct c4iw_ep *ep) +{ + struct iw_cm_event event; + + pr_debug("ep %p tid %u\n", ep, ep->hwtid); + memset(&event, 0, sizeof(event)); + event.event = IW_CM_EVENT_DISCONNECT; + if (ep->com.cm_id) { + pr_debug("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; + + pr_debug("ep %p tid %u\n", ep, ep->hwtid); + memset(&event, 0, sizeof(event)); + event.event = IW_CM_EVENT_CLOSE; + event.status = -ECONNRESET; + if (ep->com.cm_id) { + pr_debug("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); + deref_cm_id(&ep->com); + set_bit(ABORT_UPCALL, &ep->com.history); + } +} + +static void connect_reply_upcall(struct c4iw_ep *ep, int status) +{ + struct iw_cm_event event; + + pr_debug("ep %p tid %u status %d\n", + 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.ord = ep->ird; + event.ird = ep->ord; + 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.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); + } + } + + pr_debug("ep %p tid %u status %d\n", 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) + deref_cm_id(&ep->com); +} + +static int connect_request_upcall(struct c4iw_ep *ep) +{ + struct iw_cm_event event; + int ret; + + pr_debug("ep %p tid %u\n", 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; + + pr_debug("ep %p tid %u\n", ep, ep->hwtid); + memset(&event, 0, sizeof(event)); + event.event = IW_CM_EVENT_ESTABLISHED; + event.ird = ep->ord; + event.ord = ep->ird; + if (ep->com.cm_id) { + pr_debug("ep %p tid %u\n", 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 sk_buff *skb; + u32 wrlen = roundup(sizeof(struct cpl_rx_data_ack), 16); + u32 credit_dack; + + pr_debug("ep %p tid %u credits %u\n", + ep, ep->hwtid, credits); + skb = get_skb(NULL, wrlen, GFP_KERNEL); + if (!skb) { + pr_err("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; + + credit_dack = credits | RX_FORCE_ACK_F | RX_DACK_CHANGE_F | + RX_DACK_MODE_V(dack_mode); + + cxgb_mk_rx_data_ack(skb, wrlen, ep->hwtid, ep->ctrlq_idx, + credit_dack); + + c4iw_ofld_send(&ep->com.dev->rdev, skb); + return credits; +} + +#define RELAXED_IRD_NEGOTIATION 1 + +/* + * process_mpa_reply - process streaming mode MPA reply + * + * Returns: + * + * 0 upon success indicating a connect request was delivered to the ULP + * or the mpa request is incomplete but valid so far. + * + * 1 if a failure requires the caller to close the connection. + * + * 2 if a failure requires the caller to abort the connection. + */ +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; + + pr_debug("ep %p tid %u\n", 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)) { + err = -EINVAL; + goto err_stop_timer; + } + + /* + * 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) { + pr_err("%s MPA version mismatch. Local = %d, Received = %d\n", + __func__, mpa_rev, mpa->revision); + err = -EPROTO; + goto err_stop_timer; + } + if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { + err = -EPROTO; + goto err_stop_timer; + } + + plen = ntohs(mpa->private_data_size); + + /* + * Fail if there's too much private data. + */ + if (plen > MPA_MAX_PRIVATE_DATA) { + err = -EPROTO; + goto err_stop_timer; + } + + /* + * If plen does not account for pkt size + */ + if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { + err = -EPROTO; + goto err_stop_timer; + } + + 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_stop_timer; + } + + /* + * 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 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.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; + pr_debug("responder ird %u ord %u ep ird %u ord %u\n", + 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; + + pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = %d\n", + 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) { + pr_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) { + pr_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_stop_timer: + stop_ep_timer(ep); +err: + disconnect = 2; +out: + connect_reply_upcall(ep, err); + return disconnect; +} + +/* + * process_mpa_request - process streaming mode MPA request + * + * Returns: + * + * 0 upon success indicating a connect request was delivered to the ULP + * or the mpa request is incomplete but valid so far. + * + * 1 if a failure requires the caller to close the connection. + * + * 2 if a failure requires the caller to abort the connection. + */ +static int 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; + + pr_debug("ep %p tid %u\n", 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)) + goto err_stop_timer; + + pr_debug("enter (%s line %u)\n", __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 0; + + pr_debug("enter (%s line %u)\n", __FILE__, __LINE__); + mpa = (struct mpa_message *) ep->mpa_pkt; + + /* + * Validate MPA Header. + */ + if (mpa->revision > mpa_rev) { + pr_err("%s MPA version mismatch. Local = %d, Received = %d\n", + __func__, mpa_rev, mpa->revision); + goto err_stop_timer; + } + + if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) + goto err_stop_timer; + + plen = ntohs(mpa->private_data_size); + + /* + * Fail if there's too much private data. + */ + if (plen > MPA_MAX_PRIVATE_DATA) + goto err_stop_timer; + + /* + * If plen does not account for pkt size + */ + if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) + goto err_stop_timer; + ep->plen = (u8) plen; + + /* + * If we don't have all the pdata yet, then bail. + */ + if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) + return 0; + + /* + * 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->ird = min_t(u32, ep->ird, + cur_max_read_depth(ep->com.dev)); + ep->ord = ntohs(mpa_v2_params->ord) & + MPA_V2_IRD_ORD_MASK; + ep->ord = min_t(u32, ep->ord, + cur_max_read_depth(ep->com.dev)); + pr_debug("initiator ird %u ord %u\n", + 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; + + pr_debug("crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d\n", + 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); + + __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)) + goto err_unlock_parent; + } else { + goto err_unlock_parent; + } + mutex_unlock(&ep->parent_ep->com.mutex); + return 0; + +err_unlock_parent: + mutex_unlock(&ep->parent_ep->com.mutex); + goto err_out; +err_stop_timer: + (void)stop_ep_timer(ep); +err_out: + return 2; +} + +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); + __u8 status = hdr->status; + int disconnect = 0; + + ep = get_ep_from_tid(dev, tid); + if (!ep) + return 0; + pr_debug("ep %p tid %u dlen %u\n", ep, ep->hwtid, dlen); + skb_pull(skb, sizeof(*hdr)); + skb_trim(skb, dlen); + mutex_lock(&ep->com.mutex); + + switch (ep->com.state) { + case MPA_REQ_SENT: + update_rx_credits(ep, dlen); + ep->rcv_seq += dlen; + disconnect = process_mpa_reply(ep, skb); + break; + case MPA_REQ_WAIT: + update_rx_credits(ep, dlen); + ep->rcv_seq += dlen; + disconnect = process_mpa_request(ep, skb); + break; + case FPDU_MODE: { + struct c4iw_qp_attributes attrs; + + update_rx_credits(ep, dlen); + 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, disconnect == 2, GFP_KERNEL); + c4iw_put_ep(&ep->com); + return 0; +} + +static void complete_cached_srq_buffers(struct c4iw_ep *ep, + __be32 srqidx_status) +{ + enum chip_type adapter_type; + u32 srqidx; + + adapter_type = ep->com.dev->rdev.lldi.adapter_type; + srqidx = ABORT_RSS_SRQIDX_G(be32_to_cpu(srqidx_status)); + + /* + * If this TCB had a srq buffer cached, then we must complete + * it. For user mode, that means saving the srqidx in the + * user/kernel status page for this qp. For kernel mode, just + * synthesize the CQE now. + */ + if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T5 && srqidx) { + if (ep->com.qp->ibqp.uobject) + t4_set_wq_in_error(&ep->com.qp->wq, srqidx); + else + c4iw_flush_srqidx(ep->com.qp, srqidx); + } +} + +static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb) +{ + struct c4iw_ep *ep; + struct cpl_abort_rpl_rss6 *rpl = cplhdr(skb); + int release = 0; + unsigned int tid = GET_TID(rpl); + + ep = get_ep_from_tid(dev, tid); + if (!ep) { + pr_warn("Abort rpl to freed endpoint\n"); + return 0; + } + + complete_cached_srq_buffers(ep, rpl->srqidx_status); + + pr_debug("ep %p tid %u\n", ep, ep->hwtid); + mutex_lock(&ep->com.mutex); + switch (ep->com.state) { + case ABORTING: + c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET); + __state_set(&ep->com, DEAD); + release = 1; + break; + default: + pr_err("%s ep %p state %d\n", __func__, ep, ep->com.state); + break; + } + mutex_unlock(&ep->com.mutex); + + if (release) { + close_complete_upcall(ep, -ECONNRESET); + release_ep_resources(ep); + } + c4iw_put_ep(&ep->com); + return 0; +} + +static int 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; + u32 wscale; + struct sockaddr_in *sin; + int win; + + skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); + req = __skb_put_zero(skb, 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.local_addr; + req->le.lport = sin->sin_port; + req->le.u.ipv4.lip = sin->sin_addr.s_addr; + sin = (struct sockaddr_in *)&ep->com.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); + cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx, + enable_tcp_timestamps, + (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1); + wscale = cxgb_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 >> 2) | + 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); + return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); +} + +/* + * Some of the error codes above implicitly indicate that there is no TID + * allocated with the result of an ACT_OPEN. We use this predicate to make + * that explicit. + */ +static inline int act_open_has_tid(int status) +{ + return (status != CPL_ERR_TCAM_PARITY && + status != CPL_ERR_TCAM_MISS && + status != CPL_ERR_TCAM_FULL && + status != CPL_ERR_CONN_EXIST_SYNRECV && + status != CPL_ERR_CONN_EXIST); +} + +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; + pr_debug("snd_win %d rcv_win %d\n", + 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, enum chip_type adapter_type, u8 tos) +{ + 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, rt_tos2priority(tos)); + if (!ep->l2t) { + dev_put(pdev); + goto out; + } + ep->mtu = pdev->mtu; + ep->tx_chan = cxgb4_port_chan(pdev); + ep->smac_idx = cxgb4_tp_smt_idx(adapter_type, + cxgb4_port_viid(pdev)); + 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, rt_tos2priority(tos)); + if (!ep->l2t) + goto out; + ep->mtu = dst_mtu(dst); + ep->tx_chan = cxgb4_port_chan(pdev); + ep->smac_idx = cxgb4_tp_smt_idx(adapter_type, + cxgb4_port_viid(pdev)); + 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; + int size = 0; + struct sockaddr_in *laddr = (struct sockaddr_in *) + &ep->com.cm_id->m_local_addr; + struct sockaddr_in *raddr = (struct sockaddr_in *) + &ep->com.cm_id->m_remote_addr; + struct sockaddr_in6 *laddr6 = (struct sockaddr_in6 *) + &ep->com.cm_id->m_local_addr; + struct sockaddr_in6 *raddr6 = (struct sockaddr_in6 *) + &ep->com.cm_id->m_remote_addr; + int iptype; + __u8 *ra; + + pr_debug("qp %p cm_id %p\n", ep->com.qp, ep->com.cm_id); + c4iw_init_wr_wait(ep->com.wr_waitp); + + /* When MPA revision is different on nodes, the node with MPA_rev=2 + * tries to reconnect with MPA_rev 1 for the same EP through + * c4iw_reconnect(), where the same EP is assigned with new tid for + * further connection establishment. As we are using the same EP pointer + * for reconnect, few skbs are used during the previous c4iw_connect(), + * which leaves the EP with inadequate skbs for further + * c4iw_reconnect(), Further causing a crash due to an empty + * skb_list() during peer_abort(). Allocate skbs which is already used. + */ + size = (CN_MAX_CON_BUF - skb_queue_len(&ep->com.ep_skb_list)); + if (alloc_ep_skb_list(&ep->com.ep_skb_list, size)) { + err = -ENOMEM; + goto fail1; + } + + /* + * 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->m_local_addr.ss_family == AF_INET) { + ep->dst = cxgb_find_route(&ep->com.dev->rdev.lldi, get_real_dev, + laddr->sin_addr.s_addr, + raddr->sin_addr.s_addr, + laddr->sin_port, + raddr->sin_port, ep->com.cm_id->tos); + iptype = 4; + ra = (__u8 *)&raddr->sin_addr; + } else { + ep->dst = cxgb_find_route6(&ep->com.dev->rdev.lldi, + get_real_dev, + laddr6->sin6_addr.s6_addr, + raddr6->sin6_addr.s6_addr, + laddr6->sin6_port, + raddr6->sin6_port, + ep->com.cm_id->tos, + 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, + ep->com.dev->rdev.lldi.adapter_type, + ep->com.cm_id->tos); + if (err) { + pr_err("%s - cannot alloc l2e\n", __func__); + goto fail4; + } + + pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n", + ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid, + ep->l2t->idx); + + state_set(&ep->com, CONNECTING); + ep->tos = ep->com.cm_id->tos; + + /* 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); +fail1: + 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; + int ret = 0; + + ep = lookup_atid(t, atid); + la = (struct sockaddr_in *)&ep->com.local_addr; + ra = (struct sockaddr_in *)&ep->com.remote_addr; + la6 = (struct sockaddr_in6 *)&ep->com.local_addr; + ra6 = (struct sockaddr_in6 *)&ep->com.remote_addr; + + pr_debug("ep %p atid %u status %u errno %d\n", ep, atid, + status, status2errno(status)); + + if (cxgb_is_neg_adv(status)) { + pr_debug("Connection problems for atid %u status %u (%s)\n", + 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) { + ret = send_fw_act_open_req(ep, TID_TID_G(AOPEN_ATID_G( + ntohl(rpl->atid_status)))); + if (ret) + goto fail; + return 0; + } + break; + case CPL_ERR_CONN_EXIST: + if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) { + set_bit(ACT_RETRY_INUSE, &ep->com.history); + if (ep->com.remote_addr.ss_family == AF_INET6) { + struct sockaddr_in6 *sin6 = + (struct sockaddr_in6 *) + &ep->com.local_addr; + cxgb4_clip_release( + ep->com.dev->rdev.lldi.ports[0], + (const u32 *) + &sin6->sin6_addr.s6_addr, 1); + } + 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; + } + +fail: + connect_reply_upcall(ep, status2errno(status)); + state_set(&ep->com, DEAD); + + if (ep->com.remote_addr.ss_family == AF_INET6) { + struct sockaddr_in6 *sin6 = + (struct sockaddr_in6 *)&ep->com.local_addr; + cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0], + (const u32 *)&sin6->sin6_addr.s6_addr, 1); + } + if (status && act_open_has_tid(status)) + cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl), + ep->com.local_addr.ss_family); + + 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); + unsigned int stid = GET_TID(rpl); + struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid); + + if (!ep) { + pr_warn("%s stid %d lookup failure!\n", __func__, stid); + goto out; + } + pr_debug("ep %p status %d error %d\n", ep, + rpl->status, status2errno(rpl->status)); + c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status)); + c4iw_put_ep(&ep->com); +out: + return 0; +} + +static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb) +{ + struct cpl_close_listsvr_rpl *rpl = cplhdr(skb); + unsigned int stid = GET_TID(rpl); + struct c4iw_listen_ep *ep = get_ep_from_stid(dev, stid); + + if (!ep) { + pr_warn("%s stid %d lookup failure!\n", __func__, stid); + goto out; + } + pr_debug("ep %p\n", ep); + c4iw_wake_up_noref(ep->com.wr_waitp, status2errno(rpl->status)); + c4iw_put_ep(&ep->com); +out: + return 0; +} + +static int 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; + u32 wscale; + struct cpl_t5_pass_accept_rpl *rpl5 = NULL; + int win; + enum chip_type adapter_type = ep->com.dev->rdev.lldi.adapter_type; + + pr_debug("ep %p tid %u\n", ep, ep->hwtid); + cxgb_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx, + enable_tcp_timestamps && req->tcpopt.tstamp, + (ep->com.remote_addr.ss_family == AF_INET) ? 0 : 1); + wscale = cxgb_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); + + if (CHELSIO_CHIP_VERSION(adapter_type) <= CHELSIO_T5) + tcph = (const void *)(req + 1) + ETH_HDR_LEN_G(hlen) + + IP_HDR_LEN_G(hlen); + else + tcph = (const void *)(req + 1) + + T6_ETH_HDR_LEN_G(hlen) + T6_IP_HDR_LEN_G(hlen); + if (tcph->ece && tcph->cwr) + opt2 |= CCTRL_ECN_V(1); + } + + skb_get(skb); + rpl = cplhdr(skb); + if (!is_t4(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)); + + if (CHELSIO_CHIP_VERSION(adapter_type) > CHELSIO_T4) { + 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); + pr_debug("iss %u\n", 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, ep, pass_accept_rpl_arp_failure); + + return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); +} + +static void reject_cr(struct c4iw_dev *dev, u32 hwtid, struct sk_buff *skb) +{ + pr_debug("c4iw_dev %p tid %u\n", dev, hwtid); + skb_trim(skb, sizeof(struct cpl_tid_release)); + release_tid(&dev->rdev, hwtid, skb); + 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; + struct sockaddr_in6 *sin6; + int err; + u16 peer_mss = ntohs(req->tcpopt.mss); + int iptype; + unsigned short hdrs; + u8 tos = PASS_OPEN_TOS_G(ntohl(req->tos_stid)); + + parent_ep = (struct c4iw_ep *)get_ep_from_stid(dev, stid); + if (!parent_ep) { + pr_err("%s connect request on invalid stid %d\n", + __func__, stid); + goto reject; + } + + if (state_read(&parent_ep->com) != LISTEN) { + pr_err("%s - listening ep not in LISTEN\n", __func__); + goto reject; + } + + cxgb_get_4tuple(req, parent_ep->com.dev->rdev.lldi.adapter_type, + &iptype, local_ip, peer_ip, &local_port, &peer_port); + + /* Find output route */ + if (iptype == 4) { + pr_debug("parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n" + , parent_ep, hwtid, + local_ip, peer_ip, ntohs(local_port), + ntohs(peer_port), peer_mss); + dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev, + *(__be32 *)local_ip, *(__be32 *)peer_ip, + local_port, peer_port, tos); + } else { + pr_debug("parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n" + , parent_ep, hwtid, + local_ip, peer_ip, ntohs(local_port), + ntohs(peer_port), peer_mss); + dst = cxgb_find_route6(&dev->rdev.lldi, get_real_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) { + pr_err("%s - failed to find dst entry!\n", __func__); + goto reject; + } + + child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL); + if (!child_ep) { + pr_err("%s - failed to allocate ep entry!\n", __func__); + dst_release(dst); + goto reject; + } + + err = import_ep(child_ep, iptype, peer_ip, dst, dev, false, + parent_ep->com.dev->rdev.lldi.adapter_type, tos); + if (err) { + pr_err("%s - failed to allocate l2t entry!\n", __func__); + dst_release(dst); + kfree(child_ep); + goto reject; + } + + hdrs = ((iptype == 4) ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) + + 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; + + skb_queue_head_init(&child_ep->com.ep_skb_list); + if (alloc_ep_skb_list(&child_ep->com.ep_skb_list, CN_MAX_CON_BUF)) + goto fail; + + state_set(&child_ep->com, CONNECTING); + child_ep->com.dev = dev; + child_ep->com.cm_id = NULL; + + if (iptype == 4) { + struct sockaddr_in *sin = (struct sockaddr_in *) + &child_ep->com.local_addr; + + sin->sin_family = AF_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 = AF_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.remote_addr; + sin->sin_family = AF_INET; + sin->sin_port = peer_port; + sin->sin_addr.s_addr = *(__be32 *)peer_ip; + } else { + sin6 = (struct sockaddr_in6 *)&child_ep->com.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.remote_addr; + sin6->sin6_family = PF_INET6; + sin6->sin6_port = peer_port; + memcpy(sin6->sin6_addr.s6_addr, peer_ip, 16); + } + + c4iw_get_ep(&parent_ep->com); + child_ep->parent_ep = parent_ep; + child_ep->tos = tos; + child_ep->dst = dst; + child_ep->hwtid = hwtid; + + pr_debug("tx_chan %u smac_idx %u rss_qid %u\n", + child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid); + + timer_setup(&child_ep->timer, ep_timeout, 0); + cxgb4_insert_tid(t, child_ep, hwtid, + child_ep->com.local_addr.ss_family); + insert_ep_tid(child_ep); + if (accept_cr(child_ep, skb, req)) { + c4iw_put_ep(&parent_ep->com); + release_ep_resources(child_ep); + } else { + set_bit(PASS_ACCEPT_REQ, &child_ep->com.history); + } + if (iptype == 6) { + sin6 = (struct sockaddr_in6 *)&child_ep->com.local_addr; + cxgb4_clip_get(child_ep->com.dev->rdev.lldi.ports[0], + (const u32 *)&sin6->sin6_addr.s6_addr, 1); + } + goto out; +fail: + c4iw_put_ep(&child_ep->com); +reject: + reject_cr(dev, hwtid, skb); +out: + if (parent_ep) + c4iw_put_ep(&parent_ep->com); + 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); + unsigned int tid = GET_TID(req); + int ret; + u16 tcp_opt = ntohs(req->tcp_opt); + + ep = get_ep_from_tid(dev, tid); + pr_debug("ep %p tid %u\n", ep, ep->hwtid); + ep->snd_seq = be32_to_cpu(req->snd_isn); + ep->rcv_seq = be32_to_cpu(req->rcv_isn); + ep->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt); + + pr_debug("ep %p hwtid %u tcp_opt 0x%02x\n", ep, tid, tcp_opt); + + set_emss(ep, tcp_opt); + + dst_confirm(ep->dst); + mutex_lock(&ep->com.mutex); + ep->com.state = MPA_REQ_WAIT; + start_ep_timer(ep); + set_bit(PASS_ESTAB, &ep->com.history); + ret = send_flowc(ep); + mutex_unlock(&ep->com.mutex); + if (ret) + c4iw_ep_disconnect(ep, 1, GFP_KERNEL); + c4iw_put_ep(&ep->com); + + 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; + unsigned int tid = GET_TID(hdr); + int ret; + + ep = get_ep_from_tid(dev, tid); + if (!ep) + return 0; + + pr_debug("ep %p tid %u\n", 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); + pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid); + c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET); + break; + case MPA_REP_SENT: + __state_set(&ep->com, CLOSING); + pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid); + c4iw_wake_up_noref(ep->com.wr_waitp, -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: + WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state); + } + mutex_unlock(&ep->com.mutex); + if (disconnect) + c4iw_ep_disconnect(ep, 0, GFP_KERNEL); + if (release) + release_ep_resources(ep); + c4iw_put_ep(&ep->com); + return 0; +} + +static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb) +{ + struct cpl_abort_req_rss6 *req = cplhdr(skb); + struct c4iw_ep *ep; + struct sk_buff *rpl_skb; + struct c4iw_qp_attributes attrs; + int ret; + int release = 0; + unsigned int tid = GET_TID(req); + u8 status; + + u32 len = roundup(sizeof(struct cpl_abort_rpl), 16); + + ep = get_ep_from_tid(dev, tid); + if (!ep) + return 0; + + status = ABORT_RSS_STATUS_G(be32_to_cpu(req->srqidx_status)); + + if (cxgb_is_neg_adv(status)) { + pr_debug("Negative advice on abort- tid %u status %d (%s)\n", + ep->hwtid, status, neg_adv_str(status)); + ep->stats.abort_neg_adv++; + mutex_lock(&dev->rdev.stats.lock); + dev->rdev.stats.neg_adv++; + mutex_unlock(&dev->rdev.stats.lock); + goto deref_ep; + } + + complete_cached_srq_buffers(ep, req->srqidx_status); + + pr_debug("ep %p tid %u state %u\n", 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_noref(ep->com.wr_waitp, -ECONNRESET); + + mutex_lock(&ep->com.mutex); + switch (ep->com.state) { + case CONNECTING: + c4iw_put_ep(&ep->parent_ep->com); + break; + case MPA_REQ_WAIT: + (void)stop_ep_timer(ep); + break; + case MPA_REQ_SENT: + (void)stop_ep_timer(ep); + if (status != CPL_ERR_CONN_RESET || 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 + */ + pr_info("%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) + pr_err("%s - qp <- error failed!\n", __func__); + } + peer_abort_upcall(ep); + break; + case ABORTING: + break; + case DEAD: + pr_warn("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__); + mutex_unlock(&ep->com.mutex); + goto deref_ep; + default: + WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state); + 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 = skb_dequeue(&ep->com.ep_skb_list); + if (WARN_ON(!rpl_skb)) { + release = 1; + goto out; + } + + cxgb_mk_abort_rpl(rpl_skb, len, ep->hwtid, ep->txq_idx); + + c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb); +out: + if (release) + release_ep_resources(ep); + else if (ep->retry_with_mpa_v1) { + if (ep->com.remote_addr.ss_family == AF_INET6) { + struct sockaddr_in6 *sin6 = + (struct sockaddr_in6 *) + &ep->com.local_addr; + cxgb4_clip_release( + ep->com.dev->rdev.lldi.ports[0], + (const u32 *)&sin6->sin6_addr.s6_addr, + 1); + } + remove_handle(ep->com.dev, &ep->com.dev->hwtid_idr, ep->hwtid); + cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid, + ep->com.local_addr.ss_family); + dst_release(ep->dst); + cxgb4_l2t_release(ep->l2t); + c4iw_reconnect(ep); + } + +deref_ep: + c4iw_put_ep(&ep->com); + /* Dereferencing ep, referenced in peer_abort_intr() */ + c4iw_put_ep(&ep->com); + 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; + unsigned int tid = GET_TID(rpl); + + ep = get_ep_from_tid(dev, tid); + if (!ep) + return 0; + + pr_debug("ep %p tid %u\n", ep, ep->hwtid); + + /* The cm_id may be null if we failed to connect */ + mutex_lock(&ep->com.mutex); + set_bit(CLOSE_CON_RPL, &ep->com.history); + 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: + WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state); + break; + } + mutex_unlock(&ep->com.mutex); + if (release) + release_ep_resources(ep); + c4iw_put_ep(&ep->com); + return 0; +} + +static int terminate(struct c4iw_dev *dev, struct sk_buff *skb) +{ + struct cpl_rdma_terminate *rpl = cplhdr(skb); + unsigned int tid = GET_TID(rpl); + struct c4iw_ep *ep; + struct c4iw_qp_attributes attrs; + + ep = get_ep_from_tid(dev, tid); + + if (ep) { + if (ep->com.qp) { + pr_warn("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); + } + + c4iw_put_ep(&ep->com); + } else + pr_warn("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); + + + ep = get_ep_from_tid(dev, tid); + if (!ep) + return 0; + pr_debug("ep %p tid %u credits %u\n", + ep, ep->hwtid, credits); + if (credits == 0) { + pr_debug("0 credit ack ep %p tid %u state %u\n", + ep, ep->hwtid, state_read(&ep->com)); + goto out; + } + + dst_confirm(ep->dst); + if (ep->mpa_skb) { + pr_debug("last streaming msg ack ep %p tid %u state %u initiator %u freeing skb\n", + ep, ep->hwtid, state_read(&ep->com), + ep->mpa_attr.initiator ? 1 : 0); + mutex_lock(&ep->com.mutex); + kfree_skb(ep->mpa_skb); + ep->mpa_skb = NULL; + if (test_bit(STOP_MPA_TIMER, &ep->com.flags)) + stop_ep_timer(ep); + mutex_unlock(&ep->com.mutex); + } +out: + c4iw_put_ep(&ep->com); + return 0; +} + +int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) +{ + int abort; + struct c4iw_ep *ep = to_ep(cm_id); + + pr_debug("ep %p tid %u\n", ep, ep->hwtid); + + mutex_lock(&ep->com.mutex); + if (ep->com.state != MPA_REQ_RCVD) { + mutex_unlock(&ep->com.mutex); + c4iw_put_ep(&ep->com); + return -ECONNRESET; + } + set_bit(ULP_REJECT, &ep->com.history); + if (mpa_rev == 0) + abort = 1; + else + abort = send_mpa_reject(ep, pdata, pdata_len); + mutex_unlock(&ep->com.mutex); + + stop_ep_timer(ep); + c4iw_ep_disconnect(ep, abort != 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); + int abort = 0; + + pr_debug("ep %p tid %u\n", ep, ep->hwtid); + + mutex_lock(&ep->com.mutex); + if (ep->com.state != MPA_REQ_RCVD) { + err = -ECONNRESET; + goto err_out; + } + + if (!qp) { + err = -EINVAL; + goto err_out; + } + + 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))) { + err = -EINVAL; + goto err_abort; + } + + if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { + if (conn_param->ord > ep->ird) { + if (RELAXED_IRD_NEGOTIATION) { + conn_param->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); + err = -ENOMEM; + goto err_abort; + } + } + if (conn_param->ird < ep->ord) { + if (RELAXED_IRD_NEGOTIATION && + ep->ord <= h->rdev.lldi.max_ordird_qp) { + conn_param->ird = ep->ord; + } else { + err = -ENOMEM; + goto err_abort; + } + } + } + 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->ird == 0) + ep->ird = 1; + } + + pr_debug("ird %d ord %d\n", ep->ird, ep->ord); + + ep->com.cm_id = cm_id; + ref_cm_id(&ep->com); + 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 err_deref_cm_id; + + set_bit(STOP_MPA_TIMER, &ep->com.flags); + err = send_mpa_reply(ep, conn_param->private_data, + conn_param->private_data_len); + if (err) + goto err_deref_cm_id; + + __state_set(&ep->com, FPDU_MODE); + established_upcall(ep); + mutex_unlock(&ep->com.mutex); + c4iw_put_ep(&ep->com); + return 0; +err_deref_cm_id: + deref_cm_id(&ep->com); +err_abort: + abort = 1; +err_out: + mutex_unlock(&ep->com.mutex); + if (abort) + c4iw_ep_disconnect(ep, 1, GFP_KERNEL); + 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->m_local_addr; + struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_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->m_local_addr; + struct sockaddr_in6 *ra6 = (struct sockaddr_in6 *)&cm_id->m_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; + __u8 *ra; + int iptype; + + 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) { + pr_err("%s - cannot alloc ep\n", __func__); + err = -ENOMEM; + goto out; + } + + skb_queue_head_init(&ep->com.ep_skb_list); + if (alloc_ep_skb_list(&ep->com.ep_skb_list, CN_MAX_CON_BUF)) { + err = -ENOMEM; + goto fail1; + } + + timer_setup(&ep->timer, ep_timeout, 0); + 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; + + ep->com.cm_id = cm_id; + ref_cm_id(&ep->com); + cm_id->provider_data = ep; + ep->com.dev = dev; + ep->com.qp = get_qhp(dev, conn_param->qpn); + if (!ep->com.qp) { + pr_warn("%s qpn 0x%x not found!\n", __func__, conn_param->qpn); + err = -EINVAL; + goto fail2; + } + ref_qp(ep); + pr_debug("qpn 0x%x qp %p cm_id %p\n", 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) { + pr_err("%s - cannot alloc atid\n", __func__); + err = -ENOMEM; + goto fail2; + } + insert_handle(dev, &dev->atid_idr, ep, ep->atid); + + memcpy(&ep->com.local_addr, &cm_id->m_local_addr, + sizeof(ep->com.local_addr)); + memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr, + sizeof(ep->com.remote_addr)); + + laddr = (struct sockaddr_in *)&ep->com.local_addr; + raddr = (struct sockaddr_in *)&ep->com.remote_addr; + laddr6 = (struct sockaddr_in6 *)&ep->com.local_addr; + raddr6 = (struct sockaddr_in6 *) &ep->com.remote_addr; + + if (cm_id->m_remote_addr.ss_family == AF_INET) { + iptype = 4; + ra = (__u8 *)&raddr->sin_addr; + + /* + * Handle loopback requests to INADDR_ANY. + */ + if (raddr->sin_addr.s_addr == htonl(INADDR_ANY)) { + err = pick_local_ipaddrs(dev, cm_id); + if (err) + goto fail3; + } + + /* find a route */ + pr_debug("saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n", + &laddr->sin_addr, ntohs(laddr->sin_port), + ra, ntohs(raddr->sin_port)); + ep->dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev, + laddr->sin_addr.s_addr, + raddr->sin_addr.s_addr, + laddr->sin_port, + raddr->sin_port, cm_id->tos); + } 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 fail3; + } + + /* find a route */ + pr_debug("saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n", + laddr6->sin6_addr.s6_addr, + ntohs(laddr6->sin6_port), + raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port)); + ep->dst = cxgb_find_route6(&dev->rdev.lldi, get_real_dev, + laddr6->sin6_addr.s6_addr, + raddr6->sin6_addr.s6_addr, + laddr6->sin6_port, + raddr6->sin6_port, cm_id->tos, + raddr6->sin6_scope_id); + } + 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, true, + ep->com.dev->rdev.lldi.adapter_type, cm_id->tos); + if (err) { + pr_err("%s - cannot alloc l2e\n", __func__); + goto fail4; + } + + pr_debug("txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n", + ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid, + ep->l2t->idx); + + state_set(&ep->com, CONNECTING); + ep->tos = cm_id->tos; + + /* 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: + skb_queue_purge(&ep->com.ep_skb_list); + deref_cm_id(&ep->com); +fail1: + 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.local_addr; + + if (ipv6_addr_type(&sin6->sin6_addr) != IPV6_ADDR_ANY) { + err = cxgb4_clip_get(ep->com.dev->rdev.lldi.ports[0], + (const u32 *)&sin6->sin6_addr.s6_addr, 1); + if (err) + return err; + } + c4iw_init_wr_wait(ep->com.wr_waitp); + 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_waitp, + 0, 0, __func__); + else if (err > 0) + err = net_xmit_errno(err); + if (err) { + cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0], + (const u32 *)&sin6->sin6_addr.s6_addr, 1); + 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.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) { + if (c4iw_fatal_error(&ep->com.dev->rdev)) { + err = -EIO; + break; + } + set_current_state(TASK_UNINTERRUPTIBLE); + schedule_timeout(usecs_to_jiffies(100)); + } + } while (err == -EBUSY); + } else { + c4iw_init_wr_wait(ep->com.wr_waitp); + 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_waitp, + 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; + + might_sleep(); + + ep = alloc_ep(sizeof(*ep), GFP_KERNEL); + if (!ep) { + pr_err("%s - cannot alloc ep\n", __func__); + err = -ENOMEM; + goto fail1; + } + skb_queue_head_init(&ep->com.ep_skb_list); + pr_debug("ep %p\n", ep); + ep->com.cm_id = cm_id; + ref_cm_id(&ep->com); + ep->com.dev = dev; + ep->backlog = backlog; + memcpy(&ep->com.local_addr, &cm_id->m_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->m_local_addr.ss_family, ep); + else + ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, + cm_id->m_local_addr.ss_family, ep); + + if (ep->stid == -1) { + pr_err("%s - cannot alloc stid\n", __func__); + err = -ENOMEM; + goto fail2; + } + insert_handle(dev, &dev->stid_idr, ep, ep->stid); + + 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; + } + 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); +fail2: + deref_cm_id(&ep->com); + 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); + + pr_debug("ep %p\n", 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], false); + } else { + struct sockaddr_in6 *sin6; + c4iw_init_wr_wait(ep->com.wr_waitp); + err = cxgb4_remove_server( + ep->com.dev->rdev.lldi.ports[0], ep->stid, + ep->com.dev->rdev.lldi.rxq_ids[0], + ep->com.local_addr.ss_family == AF_INET6); + if (err) + goto done; + err = c4iw_wait_for_reply(&ep->com.dev->rdev, ep->com.wr_waitp, + 0, 0, __func__); + sin6 = (struct sockaddr_in6 *)&ep->com.local_addr; + cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0], + (const u32 *)&sin6->sin6_addr.s6_addr, 1); + } + 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: + deref_cm_id(&ep->com); + 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); + + pr_debug("ep %p state %s, abrupt %d\n", ep, + states[ep->com.state], abrupt); + + /* + * Ref the ep here in case we have fatal errors causing the + * ep to be released and freed. + */ + c4iw_get_ep(&ep->com); + + 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: + case CONNECTING: + close = 1; + if (abrupt) + ep->com.state = ABORTING; + else { + ep->com.state = CLOSING; + + /* + * if we close before we see the fw4_ack() then we fix + * up the timer state since we're reusing it. + */ + if (ep->mpa_skb && + test_bit(STOP_MPA_TIMER, &ep->com.flags)) { + clear_bit(STOP_MPA_TIMER, &ep->com.flags); + stop_ep_timer(ep); + } + 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: + pr_debug("ignoring disconnect ep %p state %u\n", + ep, ep->com.state); + break; + default: + WARN_ONCE(1, "Bad endpoint state %u\n", ep->com.state); + break; + } + + if (close) { + if (abrupt) { + set_bit(EP_DISC_ABORT, &ep->com.history); + ret = send_abort(ep); + } else { + set_bit(EP_DISC_CLOSE, &ep->com.history); + ret = send_halfclose(ep); + } + if (ret) { + set_bit(EP_DISC_FAIL, &ep->com.history); + if (!abrupt) { + stop_ep_timer(ep); + close_complete_upcall(ep, -EIO); + } + if (ep->com.qp) { + struct c4iw_qp_attributes attrs; + + 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) + pr_err("%s - qp <- error failed!\n", + __func__); + } + fatal = 1; + } + } + mutex_unlock(&ep->com.mutex); + c4iw_put_ep(&ep->com); + 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; + } + /* fall through */ + 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); + if (ep->com.remote_addr.ss_family == AF_INET6) { + struct sockaddr_in6 *sin6 = + (struct sockaddr_in6 *)&ep->com.local_addr; + cxgb4_clip_release(ep->com.dev->rdev.lldi.ports[0], + (const u32 *)&sin6->sin6_addr.s6_addr, 1); + } + 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; + if (req->retval) { + pr_err("%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) +{ + __be32 l2info; + __be16 hdr_len, vlantag, len; + u16 eth_hdr_len; + int tcp_hdr_len, ip_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; + enum chip_type type; + + dev = *((struct c4iw_dev **) (skb->cb + sizeof(void *))); + /* Store values from cpl_rx_pkt in temporary location. */ + vlantag = cpl->vlan; + len = cpl->len; + l2info = cpl->l2info; + hdr_len = 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(&init_net, skb, &tmp_opt, 0, NULL); + + 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( + be32_to_cpu(l2info))) | + SYN_XACT_MATCH_F); + type = dev->rdev.lldi.adapter_type; + tcp_hdr_len = RX_TCPHDR_LEN_G(be16_to_cpu(hdr_len)); + ip_hdr_len = RX_IPHDR_LEN_G(be16_to_cpu(hdr_len)); + req->hdr_len = + cpu_to_be32(SYN_RX_CHAN_V(RX_CHAN_G(be32_to_cpu(l2info)))); + if (CHELSIO_CHIP_VERSION(type) <= CHELSIO_T5) { + eth_hdr_len = is_t4(type) ? + RX_ETHHDR_LEN_G(be32_to_cpu(l2info)) : + RX_T5_ETHHDR_LEN_G(be32_to_cpu(l2info)); + req->hdr_len |= cpu_to_be32(TCP_HDR_LEN_V(tcp_hdr_len) | + IP_HDR_LEN_V(ip_hdr_len) | + ETH_HDR_LEN_V(eth_hdr_len)); + } else { /* T6 and later */ + eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(l2info)); + req->hdr_len |= cpu_to_be32(T6_TCP_HDR_LEN_V(tcp_hdr_len) | + T6_IP_HDR_LEN_V(ip_hdr_len) | + T6_ETH_HDR_LEN_V(eth_hdr_len)); + } + req->vlan = vlantag; + req->len = 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); + if (!req_skb) + return; + req = __skb_put_zero(req_skb, 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 = NULL; + u16 window; + struct port_info *pi; + struct net_device *pdev; + u16 rss_qid, eth_hdr_len; + int step; + 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 *)get_ep_from_stid(dev, stid); + if (!lep) { + pr_warn("%s connect request on invalid stid %d\n", + __func__, stid); + goto reject; + } + + switch (CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)) { + case CHELSIO_T4: + eth_hdr_len = RX_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info)); + break; + case CHELSIO_T5: + eth_hdr_len = RX_T5_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info)); + break; + case CHELSIO_T6: + eth_hdr_len = RX_T6_ETHHDR_LEN_G(be32_to_cpu(cpl->l2info)); + break; + default: + pr_err("T%d Chip is not supported\n", + CHELSIO_CHIP_VERSION(dev->rdev.lldi.adapter_type)); + goto reject; + } + + 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); + + pr_debug("lip 0x%x lport %u pip 0x%x pport %u tos %d\n", + ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr), + ntohs(tcph->source), iph->tos); + + dst = cxgb_find_route(&dev->rdev.lldi, get_real_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); + 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); + } + 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: + if (lep) + c4iw_put_ep(&lep->com); + return 0; +} + +/* + * These are the real handlers that are called from a + * work queue. + */ +static c4iw_handler_func work_handlers[NUM_CPL_CMDS + NUM_FAKE_CPLS] = { + [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, + [FAKE_CPL_PUT_EP_SAFE] = _put_ep_safe, + [FAKE_CPL_PASS_PUT_EP_SAFE] = _put_pass_ep_safe +}; + +static void process_timeout(struct c4iw_ep *ep) +{ + struct c4iw_qp_attributes attrs; + int abort = 1; + + mutex_lock(&ep->com.mutex); + pr_debug("ep %p tid %u state %d\n", ep, ep->hwtid, ep->com.state); + set_bit(TIMEDOUT, &ep->com.history); + switch (ep->com.state) { + case MPA_REQ_SENT: + connect_reply_upcall(ep, -ETIMEDOUT); + break; + case MPA_REQ_WAIT: + case MPA_REQ_RCVD: + case MPA_REP_SENT: + case FPDU_MODE: + 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); + } + 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; + } + mutex_unlock(&ep->com.mutex); + if (abort) + c4iw_ep_disconnect(ep, 1, GFP_KERNEL); + 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; + + if (opcode >= ARRAY_SIZE(work_handlers) || + !work_handlers[opcode]) { + pr_err("No handler for opcode 0x%x.\n", opcode); + kfree_skb(skb); + } else { + 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(struct timer_list *t) +{ + struct c4iw_ep *ep = from_timer(ep, t, timer); + 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) { + pr_err("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; + + pr_debug("type %u\n", 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]; + pr_debug("wr_waitp %p ret %u\n", wr_waitp, ret); + if (wr_waitp) + c4iw_wake_up_deref(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: + pr_err("%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; + unsigned int tid = GET_TID(req); + + ep = get_ep_from_tid(dev, tid); + /* This EP will be dereferenced in peer_abort() */ + if (!ep) { + pr_warn("Abort on non-existent endpoint, tid %d\n", tid); + kfree_skb(skb); + return 0; + } + if (cxgb_is_neg_adv(req->status)) { + pr_debug("Negative advice on abort- tid %u status %d (%s)\n", + ep->hwtid, req->status, + neg_adv_str(req->status)); + goto out; + } + pr_debug("ep %p tid %u state %u\n", ep, ep->hwtid, ep->com.state); + + c4iw_wake_up_noref(ep->com.wr_waitp, -ECONNRESET); +out: + 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 = alloc_ordered_workqueue("iw_cxgb4", WQ_MEM_RECLAIM); + if (!workq) + return -ENOMEM; + + return 0; +} + +void c4iw_cm_term(void) +{ + WARN_ON(!list_empty(&timeout_list)); + flush_workqueue(workq); + destroy_workqueue(workq); +} |