| /* |
| * 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)"); |
| |
| int c4iw_debug; |
| module_param(c4iw_debug, int, 0644); |
| MODULE_PARM_DESC(c4iw_debug, "obsolete"); |
| |
| 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(unsigned long arg); |
| 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("%s ep %p\n", __func__, ep); |
| if (timer_pending(&ep->timer)) { |
| pr_err("%s timer already started! ep %p\n", |
| __func__, ep); |
| return; |
| } |
| clear_bit(TIMEOUT, &ep->com.flags); |
| c4iw_get_ep(&ep->com); |
| ep->timer.expires = jiffies + ep_timeout_secs * HZ; |
| ep->timer.data = (unsigned long)ep; |
| ep->timer.function = ep_timeout; |
| add_timer(&ep->timer); |
| } |
| |
| static int stop_ep_timer(struct c4iw_ep *ep) |
| { |
| pr_debug("%s ep %p stopping\n", __func__, ep); |
| del_timer_sync(&ep->timer); |
| if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) { |
| c4iw_put_ep(&ep->com); |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb, |
| struct l2t_entry *l2e) |
| { |
| int error = 0; |
| |
| if (c4iw_fatal_error(rdev)) { |
| kfree_skb(skb); |
| pr_debug("%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_debug("%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("%s mss_idx %u mss %u emss=%u\n", __func__, TCPOPT_MSS_G(opt), |
| ep->mss, ep->emss); |
| } |
| |
| static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc) |
| { |
| enum c4iw_ep_state state; |
| |
| mutex_lock(&epc->mutex); |
| state = epc->state; |
| mutex_unlock(&epc->mutex); |
| return state; |
| } |
| |
| static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new) |
| { |
| epc->state = new; |
| } |
| |
| static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new) |
| { |
| mutex_lock(&epc->mutex); |
| pr_debug("%s - %s -> %s\n", __func__, 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) { |
| kref_init(&epc->kref); |
| mutex_init(&epc->mutex); |
| c4iw_init_wr_wait(&epc->wr_wait); |
| } |
| pr_debug("%s alloc ep %p\n", __func__, epc); |
| 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("%s ep %p state %s\n", __func__, 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); |
| 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); |
| } |
| 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); |
| kfree_skb(skb); |
| 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); |
| kfree_skb(skb); |
| 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("%s rdev %p\n", __func__, 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); |
| int i; |
| u16 vlan = ep->l2t->vlan; |
| int nparams; |
| |
| if (WARN_ON(!skb)) |
| return -ENOMEM; |
| |
| if (vlan == CPL_L2T_VLAN_NONE) |
| nparams = 8; |
| else |
| nparams = 9; |
| |
| flowc = __skb_put(skb, FLOWC_LEN); |
| |
| 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(DIV_ROUND_UP(FLOWC_LEN, |
| 16)) | FW_WR_FLOWID_V(ep->hwtid)); |
| |
| flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; |
| flowc->mnemval[0].val = cpu_to_be32(FW_PFVF_CMD_PFN_V |
| (ep->com.dev->rdev.lldi.pf)); |
| flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH; |
| flowc->mnemval[1].val = cpu_to_be32(ep->tx_chan); |
| flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT; |
| flowc->mnemval[2].val = cpu_to_be32(ep->tx_chan); |
| flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID; |
| flowc->mnemval[3].val = cpu_to_be32(ep->rss_qid); |
| flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDNXT; |
| flowc->mnemval[4].val = cpu_to_be32(ep->snd_seq); |
| flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_RCVNXT; |
| flowc->mnemval[5].val = cpu_to_be32(ep->rcv_seq); |
| flowc->mnemval[6].mnemonic = FW_FLOWC_MNEM_SNDBUF; |
| flowc->mnemval[6].val = cpu_to_be32(ep->snd_win); |
| flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; |
| flowc->mnemval[7].val = cpu_to_be32(ep->emss); |
| if (nparams == 9) { |
| u16 pri; |
| |
| pri = (vlan & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; |
| flowc->mnemval[8].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS; |
| flowc->mnemval[8].val = cpu_to_be32(pri); |
| } else { |
| /* Pad WR to 16 byte boundary */ |
| flowc->mnemval[8].mnemonic = 0; |
| flowc->mnemval[8].val = 0; |
| } |
| for (i = 0; i < 9; i++) { |
| flowc->mnemval[i].r4[0] = 0; |
| flowc->mnemval[i].r4[1] = 0; |
| flowc->mnemval[i].r4[2] = 0; |
| } |
| |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); |
| 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("%s ep %p tid %u\n", __func__, 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("%s ep %p tid %u\n", __func__, 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("%s ep %p atid %u\n", __func__, 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("%s snd_isn %u\n", __func__, 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("%s snd_isn %u\n", __func__, 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("%s snd_isn %u\n", __func__, 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("%s snd_isn %u\n", __func__, 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("%s ep %p tid %u pd_len %d\n", |
| __func__, ep, ep->hwtid, ep->plen); |
| |
| BUG_ON(skb_cloned(skb)); |
| |
| mpalen = sizeof(*mpa) + ep->plen; |
| if (mpa_rev_to_use == 2) |
| mpalen += sizeof(struct mpa_v2_conn_params); |
| wrlen = roundup(mpalen + sizeof *req, 16); |
| skb = get_skb(skb, wrlen, GFP_KERNEL); |
| if (!skb) { |
| connect_reply_upcall(ep, -ENOMEM); |
| return -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("%s initiator ird %u ord %u\n", __func__, ep->ird, |
| ep->ord); |
| mpa_v2_params.ird = htons((u16)ep->ird); |
| mpa_v2_params.ord = htons((u16)ep->ord); |
| |
| if (peer2peer) { |
| mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL); |
| if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) |
| mpa_v2_params.ord |= |
| htons(MPA_V2_RDMA_WRITE_RTR); |
| else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) |
| mpa_v2_params.ord |= |
| htons(MPA_V2_RDMA_READ_RTR); |
| } |
| memcpy(mpa->private_data, &mpa_v2_params, |
| sizeof(struct mpa_v2_conn_params)); |
| |
| if (ep->plen) |
| memcpy(mpa->private_data + |
| sizeof(struct mpa_v2_conn_params), |
| ep->mpa_pkt + sizeof(*mpa), ep->plen); |
| } else |
| if (ep->plen) |
| memcpy(mpa->private_data, |
| ep->mpa_pkt + sizeof(*mpa), ep->plen); |
| |
| /* |
| * Reference the mpa skb. This ensures the data area |
| * will remain in memory until the hw acks the tx. |
| * Function fw4_ack() will deref it. |
| */ |
| skb_get(skb); |
| t4_set_arp_err_handler(skb, NULL, arp_failure_discard); |
| BUG_ON(ep->mpa_skb); |
| ep->mpa_skb = skb; |
| 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("%s ep %p tid %u pd_len %d\n", |
| __func__, ep, ep->hwtid, ep->plen); |
| |
| mpalen = sizeof(*mpa) + plen; |
| if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) |
| mpalen += sizeof(struct mpa_v2_conn_params); |
| wrlen = roundup(mpalen + sizeof *req, 16); |
| |
| skb = get_skb(NULL, wrlen, GFP_KERNEL); |
| if (!skb) { |
| 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); |
| BUG_ON(ep->mpa_skb); |
| ep->mpa_skb = skb; |
| ep->snd_seq += mpalen; |
| return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); |
| } |
| |
| static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen) |
| { |
| int mpalen, wrlen; |
| struct fw_ofld_tx_data_wr *req; |
| struct mpa_message *mpa; |
| struct sk_buff *skb; |
| struct mpa_v2_conn_params mpa_v2_params; |
| |
| pr_debug("%s ep %p tid %u pd_len %d\n", |
| __func__, ep, ep->hwtid, ep->plen); |
| |
| mpalen = sizeof(*mpa) + plen; |
| if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) |
| mpalen += sizeof(struct mpa_v2_conn_params); |
| wrlen = roundup(mpalen + sizeof *req, 16); |
| |
| skb = get_skb(NULL, wrlen, GFP_KERNEL); |
| if (!skb) { |
| 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 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("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid, |
| be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn)); |
| |
| mutex_lock(&ep->com.mutex); |
| dst_confirm(ep->dst); |
| |
| /* setup the hwtid for this connection */ |
| ep->hwtid = tid; |
| cxgb4_insert_tid(t, ep, tid, 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); |
| |
| set_emss(ep, ntohs(req->tcp_opt)); |
| |
| /* dealloc the atid */ |
| remove_handle(ep->com.dev, &ep->com.dev->atid_idr, atid); |
| cxgb4_free_atid(t, atid); |
| set_bit(ACT_ESTAB, &ep->com.history); |
| |
| /* start MPA negotiation */ |
| 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("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_CLOSE; |
| event.status = status; |
| if (ep->com.cm_id) { |
| 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("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_DISCONNECT; |
| if (ep->com.cm_id) { |
| 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("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_CLOSE; |
| event.status = -ECONNRESET; |
| if (ep->com.cm_id) { |
| 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("%s ep %p tid %u status %d\n", |
| __func__, ep, ep->hwtid, status); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_CONNECT_REPLY; |
| event.status = status; |
| memcpy(&event.local_addr, &ep->com.local_addr, |
| sizeof(ep->com.local_addr)); |
| memcpy(&event.remote_addr, &ep->com.remote_addr, |
| sizeof(ep->com.remote_addr)); |
| |
| if ((status == 0) || (status == -ECONNREFUSED)) { |
| if (!ep->tried_with_mpa_v1) { |
| /* this means MPA_v2 is used */ |
| event.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("%s ep %p tid %u status %d\n", __func__, ep, |
| ep->hwtid, status); |
| set_bit(CONN_RPL_UPCALL, &ep->com.history); |
| ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
| |
| if (status < 0) |
| deref_cm_id(&ep->com); |
| } |
| |
| static int connect_request_upcall(struct c4iw_ep *ep) |
| { |
| struct iw_cm_event event; |
| int ret; |
| |
| pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_CONNECT_REQUEST; |
| memcpy(&event.local_addr, &ep->com.local_addr, |
| sizeof(ep->com.local_addr)); |
| memcpy(&event.remote_addr, &ep->com.remote_addr, |
| sizeof(ep->com.remote_addr)); |
| event.provider_data = ep; |
| if (!ep->tried_with_mpa_v1) { |
| /* this means MPA_v2 is used */ |
| event.ord = ep->ord; |
| event.ird = ep->ird; |
| event.private_data_len = ep->plen - |
| sizeof(struct mpa_v2_conn_params); |
| event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) + |
| sizeof(struct mpa_v2_conn_params); |
| } else { |
| /* this means MPA_v1 is used. Send max supported */ |
| event.ord = cur_max_read_depth(ep->com.dev); |
| event.ird = cur_max_read_depth(ep->com.dev); |
| event.private_data_len = ep->plen; |
| event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); |
| } |
| c4iw_get_ep(&ep->com); |
| ret = ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id, |
| &event); |
| if (ret) |
| c4iw_put_ep(&ep->com); |
| set_bit(CONNREQ_UPCALL, &ep->com.history); |
| c4iw_put_ep(&ep->parent_ep->com); |
| return ret; |
| } |
| |
| static void established_upcall(struct c4iw_ep *ep) |
| { |
| struct iw_cm_event event; |
| |
| pr_debug("%s ep %p tid %u\n", __func__, 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("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
| set_bit(ESTAB_UPCALL, &ep->com.history); |
| } |
| } |
| |
| static int update_rx_credits(struct c4iw_ep *ep, u32 credits) |
| { |
| struct sk_buff *skb; |
| u32 wrlen = roundup(sizeof(struct cpl_rx_data_ack), 16); |
| u32 credit_dack; |
| |
| pr_debug("%s ep %p tid %u credits %u\n", |
| __func__, 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("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| |
| /* |
| * If we get more than the supported amount of private data |
| * then we must fail this connection. |
| */ |
| if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { |
| 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("%s responder ird %u ord %u ep ird %u ord %u\n", |
| __func__, |
| resp_ird, resp_ord, ep->ird, ep->ord); |
| |
| /* |
| * This is a double-check. Ideally, below checks are |
| * not required since ird/ord stuff has been taken |
| * care of in c4iw_accept_cr |
| */ |
| if (ep->ird < resp_ord) { |
| if (RELAXED_IRD_NEGOTIATION && resp_ord <= |
| ep->com.dev->rdev.lldi.max_ordird_qp) |
| ep->ird = resp_ord; |
| else |
| insuff_ird = 1; |
| } else if (ep->ird > resp_ord) { |
| ep->ird = resp_ord; |
| } |
| if (ep->ord > resp_ird) { |
| if (RELAXED_IRD_NEGOTIATION) |
| ep->ord = resp_ird; |
| else |
| insuff_ird = 1; |
| } |
| if (insuff_ird) { |
| err = -ENOMEM; |
| ep->ird = resp_ord; |
| ep->ord = resp_ird; |
| } |
| |
| if (ntohs(mpa_v2_params->ird) & |
| MPA_V2_PEER2PEER_MODEL) { |
| if (ntohs(mpa_v2_params->ord) & |
| MPA_V2_RDMA_WRITE_RTR) |
| ep->mpa_attr.p2p_type = |
| FW_RI_INIT_P2PTYPE_RDMA_WRITE; |
| else if (ntohs(mpa_v2_params->ord) & |
| MPA_V2_RDMA_READ_RTR) |
| ep->mpa_attr.p2p_type = |
| FW_RI_INIT_P2PTYPE_READ_REQ; |
| } |
| } |
| } else if (mpa->revision == 1) |
| if (peer2peer) |
| ep->mpa_attr.p2p_type = p2p_type; |
| |
| pr_debug("%s - crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = %d\n", |
| __func__, ep->mpa_attr.crc_enabled, |
| ep->mpa_attr.recv_marker_enabled, |
| ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version, |
| ep->mpa_attr.p2p_type, p2p_type); |
| |
| /* |
| * If responder's RTR does not match with that of initiator, assign |
| * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not |
| * generated when moving QP to RTS state. |
| * A TERM message will be sent after QP has moved to RTS state |
| */ |
| if ((ep->mpa_attr.version == 2) && peer2peer && |
| (ep->mpa_attr.p2p_type != p2p_type)) { |
| ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; |
| rtr_mismatch = 1; |
| } |
| |
| attrs.mpa_attr = ep->mpa_attr; |
| attrs.max_ird = ep->ird; |
| attrs.max_ord = ep->ord; |
| attrs.llp_stream_handle = ep; |
| attrs.next_state = C4IW_QP_STATE_RTS; |
| |
| mask = C4IW_QP_ATTR_NEXT_STATE | |
| C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR | |
| C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD; |
| |
| /* bind QP and TID with INIT_WR */ |
| err = c4iw_modify_qp(ep->com.qp->rhp, |
| ep->com.qp, mask, &attrs, 1); |
| if (err) |
| goto err; |
| |
| /* |
| * If responder's RTR requirement did not match with what initiator |
| * supports, generate TERM message |
| */ |
| if (rtr_mismatch) { |
| 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("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| |
| /* |
| * If we get more than the supported amount of private data |
| * then we must fail this connection. |
| */ |
| if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) |
| goto err_stop_timer; |
| |
| pr_debug("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
| |
| /* |
| * Copy the new data into our accumulation buffer. |
| */ |
| skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), |
| skb->len); |
| ep->mpa_pkt_len += skb->len; |
| |
| /* |
| * If we don't even have the mpa message, then bail. |
| * We'll continue process when more data arrives. |
| */ |
| if (ep->mpa_pkt_len < sizeof(*mpa)) |
| return 0; |
| |
| pr_debug("%s enter (%s line %u)\n", __func__, __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("%s initiator ird %u ord %u\n", |
| __func__, ep->ird, ep->ord); |
| if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL) |
| if (peer2peer) { |
| if (ntohs(mpa_v2_params->ord) & |
| MPA_V2_RDMA_WRITE_RTR) |
| ep->mpa_attr.p2p_type = |
| FW_RI_INIT_P2PTYPE_RDMA_WRITE; |
| else if (ntohs(mpa_v2_params->ord) & |
| MPA_V2_RDMA_READ_RTR) |
| ep->mpa_attr.p2p_type = |
| FW_RI_INIT_P2PTYPE_READ_REQ; |
| } |
| } |
| } else if (mpa->revision == 1) |
| if (peer2peer) |
| ep->mpa_attr.p2p_type = p2p_type; |
| |
| pr_debug("%s - crc_enabled=%d, recv_marker_enabled=%d, xmit_marker_enabled=%d, version=%d p2p_type=%d\n", |
| __func__, |
| ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, |
| ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version, |
| ep->mpa_attr.p2p_type); |
| |
| __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("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen); |
| skb_pull(skb, sizeof(*hdr)); |
| skb_trim(skb, dlen); |
| mutex_lock(&ep->com.mutex); |
| |
| 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); |
| BUG_ON(!ep->com.qp); |
| if (status) |
| pr_err("%s Unexpected streaming data." \ |
| " qpid %u ep %p state %d tid %u status %d\n", |
| __func__, ep->com.qp->wq.sq.qid, ep, |
| ep->com.state, ep->hwtid, status); |
| attrs.next_state = C4IW_QP_STATE_TERMINATE; |
| c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, |
| C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); |
| disconnect = 1; |
| break; |
| } |
| default: |
| break; |
| } |
| mutex_unlock(&ep->com.mutex); |
| if (disconnect) |
| c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL); |
| c4iw_put_ep(&ep->com); |
| return 0; |
| } |
| |
| static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct c4iw_ep *ep; |
| struct cpl_abort_rpl_rss *rpl = cplhdr(skb); |
| int release = 0; |
| unsigned int tid = GET_TID(rpl); |
| |
| ep = get_ep_from_tid(dev, tid); |
| if (!ep) { |
| pr_warn("Abort rpl to freed endpoint\n"); |
| return 0; |
| } |
| pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| mutex_lock(&ep->com.mutex); |
| switch (ep->com.state) { |
| case ABORTING: |
| c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); |
| __state_set(&ep->com, DEAD); |
| release = 1; |
| break; |
| default: |
| pr_err("%s ep %p state %d\n", __func__, ep, ep->com.state); |
| break; |
| } |
| mutex_unlock(&ep->com.mutex); |
| |
| if (release) |
| 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("%s snd_win %d rcv_win %d\n", |
| __func__, ep->snd_win, ep->rcv_win); |
| } |
| |
| #define ACT_OPEN_RETRY_COUNT 2 |
| |
| static int import_ep(struct c4iw_ep *ep, int iptype, __u8 *peer_ip, |
| struct dst_entry *dst, struct c4iw_dev *cdev, |
| bool clear_mpa_v1, 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, 0); |
| 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("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id); |
| init_timer(&ep->timer); |
| c4iw_init_wr_wait(&ep->com.wr_wait); |
| |
| /* 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 an assert BUG_ON() due to 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, 0, |
| raddr6->sin6_scope_id); |
| iptype = 6; |
| ra = (__u8 *)&raddr6->sin6_addr; |
| } |
| if (!ep->dst) { |
| pr_err("%s - cannot find route\n", __func__); |
| err = -EHOSTUNREACH; |
| goto fail3; |
| } |
| err = import_ep(ep, iptype, ra, ep->dst, ep->com.dev, false, |
| 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("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n", |
| __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid, |
| ep->l2t->idx); |
| |
| state_set(&ep->com, CONNECTING); |
| ep->tos = 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("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid, |
| status, status2errno(status)); |
| |
| if (cxgb_is_neg_adv(status)) { |
| pr_debug("%s Connection problems for atid %u status %u (%s)\n", |
| __func__, atid, status, neg_adv_str(status)); |
| ep->stats.connect_neg_adv++; |
| mutex_lock(&dev->rdev.stats.lock); |
| dev->rdev.stats.neg_adv++; |
| mutex_unlock(&dev->rdev.stats.lock); |
| return 0; |
| } |
| |
| set_bit(ACT_OPEN_RPL, &ep->com.history); |
| |
| /* |
| * Log interesting failures. |
| */ |
| switch (status) { |
| case CPL_ERR_CONN_RESET: |
| case CPL_ERR_CONN_TIMEDOUT: |
| break; |
| case CPL_ERR_TCAM_FULL: |
| mutex_lock(&dev->rdev.stats.lock); |
| dev->rdev.stats.tcam_full++; |
| mutex_unlock(&dev->rdev.stats.lock); |
| if (ep->com.local_addr.ss_family == AF_INET && |
| dev->rdev.lldi.enable_fw_ofld_conn) { |
| 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_debug("%s stid %d lookup failure!\n", __func__, stid); |
| goto out; |
| } |
| pr_debug("%s ep %p status %d error %d\n", __func__, ep, |
| rpl->status, status2errno(rpl->status)); |
| c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status)); |
| 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); |
| |
| pr_debug("%s ep %p\n", __func__, ep); |
| c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status)); |
| c4iw_put_ep(&ep->com); |
| 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("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| BUG_ON(skb_cloned(skb)); |
| |
| 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)); |
| |
| 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); |
| } |
| 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("%s iss %u\n", __func__, be32_to_cpu(rpl5->iss)); |
| } |
| |
| rpl->opt0 = cpu_to_be64(opt0); |
| rpl->opt2 = cpu_to_be32(opt2); |
| set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx); |
| t4_set_arp_err_handler(skb, 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("%s c4iw_dev %p tid %u\n", __func__, dev, hwtid); |
| BUG_ON(skb_cloned(skb)); |
| skb_trim(skb, sizeof(struct cpl_tid_release)); |
| release_tid(&dev->rdev, hwtid, skb); |
| return; |
| } |
| |
| static 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_debug("%s connect request on invalid stid %d\n", |
| __func__, stid); |
| goto reject; |
| } |
| |
| if (state_read(&parent_ep->com) != LISTEN) { |
| pr_debug("%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("%s parent ep %p hwtid %u laddr %pI4 raddr %pI4 lport %d rport %d peer_mss %d\n" |
| , __func__, parent_ep, hwtid, |
| local_ip, peer_ip, ntohs(local_port), |
| ntohs(peer_port), peer_mss); |
| dst = cxgb_find_route(&dev->rdev.lldi, get_real_dev, |
| *(__be32 *)local_ip, *(__be32 *)peer_ip, |
| local_port, peer_port, tos); |
| } else { |
| pr_debug("%s parent ep %p hwtid %u laddr %pI6 raddr %pI6 lport %d rport %d peer_mss %d\n" |
| , __func__, parent_ep, hwtid, |
| local_ip, peer_ip, ntohs(local_port), |
| ntohs(peer_port), peer_mss); |
| dst = 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("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__, |
| child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid); |
| |
| init_timer(&child_ep->timer); |
| cxgb4_insert_tid(t, child_ep, hwtid, |
| 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); |
| if (parent_ep) |
| c4iw_put_ep(&parent_ep->com); |
| out: |
| return 0; |
| } |
| |
| static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct c4iw_ep *ep; |
| struct cpl_pass_establish *req = cplhdr(skb); |
| unsigned int tid = GET_TID(req); |
| int ret; |
| |
| ep = get_ep_from_tid(dev, tid); |
| pr_debug("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| ep->snd_seq = be32_to_cpu(req->snd_isn); |
| ep->rcv_seq = be32_to_cpu(req->rcv_isn); |
| |
| pr_debug("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid, |
| ntohs(req->tcp_opt)); |
| |
| set_emss(ep, ntohs(req->tcp_opt)); |
| |
| dst_confirm(ep->dst); |
| 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("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| dst_confirm(ep->dst); |
| |
| set_bit(PEER_CLOSE, &ep->com.history); |
| mutex_lock(&ep->com.mutex); |
| switch (ep->com.state) { |
| case MPA_REQ_WAIT: |
| __state_set(&ep->com, CLOSING); |
| break; |
| case MPA_REQ_SENT: |
| __state_set(&ep->com, CLOSING); |
| connect_reply_upcall(ep, -ECONNRESET); |
| break; |
| case MPA_REQ_RCVD: |
| |
| /* |
| * We're gonna mark this puppy DEAD, but keep |
| * the reference on it until the ULP accepts or |
| * rejects the CR. Also wake up anyone waiting |
| * in rdma connection migration (see c4iw_accept_cr()). |
| */ |
| __state_set(&ep->com, CLOSING); |
| pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid); |
| c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); |
| break; |
| case MPA_REP_SENT: |
| __state_set(&ep->com, CLOSING); |
| pr_debug("waking up ep %p tid %u\n", ep, ep->hwtid); |
| c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); |
| break; |
| case FPDU_MODE: |
| start_ep_timer(ep); |
| __state_set(&ep->com, CLOSING); |
| attrs.next_state = C4IW_QP_STATE_CLOSING; |
| ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, |
| C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); |
| if (ret != -ECONNRESET) { |
| peer_close_upcall(ep); |
| disconnect = 1; |
| } |
| break; |
| case ABORTING: |
| disconnect = 0; |
| break; |
| case CLOSING: |
| __state_set(&ep->com, MORIBUND); |
| disconnect = 0; |
| break; |
| case MORIBUND: |
| (void)stop_ep_timer(ep); |
| if (ep->com.cm_id && ep->com.qp) { |
| attrs.next_state = C4IW_QP_STATE_IDLE; |
| c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, |
| C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); |
| } |
| close_complete_upcall(ep, 0); |
| __state_set(&ep->com, DEAD); |
| release = 1; |
| disconnect = 0; |
| break; |
| case DEAD: |
| disconnect = 0; |
| break; |
| default: |
| BUG_ON(1); |
| } |
| mutex_unlock(&ep->com.mutex); |
| if (disconnect) |
| c4iw_ep_disconnect(ep, 0, GFP_KERNEL); |
| if (release) |
| release_ep_resources(ep); |
| c4iw_put_ep(&ep->com); |
| return 0; |
| } |
| |
| static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct cpl_abort_req_rss *req = cplhdr(skb); |
| struct c4iw_ep *ep; |
| struct sk_buff *rpl_skb; |
| struct c4iw_qp_attributes attrs; |
| int ret; |
| int release = 0; |
| unsigned int tid = GET_TID(req); |
| u32 len = roundup(sizeof(struct cpl_abort_rpl), 16); |
| |
| ep = get_ep_from_tid(dev, tid); |
| if (!ep) |
| return 0; |
| |
| if (cxgb_is_neg_adv(req->status)) { |
| pr_debug("%s Negative advice on abort- tid %u status %d (%s)\n", |
| __func__, ep->hwtid, req->status, |
| neg_adv_str(req->status)); |
| ep->stats.abort_neg_adv++; |
| mutex_lock(&dev->rdev.stats.lock); |
| dev->rdev.stats.neg_adv++; |
| mutex_unlock(&dev->rdev.stats.lock); |
| goto deref_ep; |
| } |
| pr_debug("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid, |
| ep->com.state); |
| set_bit(PEER_ABORT, &ep->com.history); |
| |
| /* |
| * Wake up any threads in rdma_init() or rdma_fini(). |
| * However, this is not needed if com state is just |
| * MPA_REQ_SENT |
| */ |
| if (ep->com.state != MPA_REQ_SENT) |
| c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); |
| |
| mutex_lock(&ep->com.mutex); |
| switch (ep->com.state) { |
| case CONNECTING: |
| 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 (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_debug("%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_debug("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__); |
| mutex_unlock(&ep->com.mutex); |
| goto deref_ep; |
| default: |
| BUG_ON(1); |
| break; |
| } |
| dst_confirm(ep->dst); |
| if (ep->com.state != ABORTING) { |
| __state_set(&ep->com, DEAD); |
| /* we don't release if we want to retry with mpa_v1 */ |
| if (!ep->retry_with_mpa_v1) |
| release = 1; |
| } |
| mutex_unlock(&ep->com.mutex); |
| |
| rpl_skb = 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("%s ep %p tid %u\n", __func__, 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: |
| BUG_ON(1); |
| 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); |
| BUG_ON(!ep); |
| |
| if (ep && 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); |
| } else |
| pr_warn("TERM received tid %u no ep/qp\n", tid); |
| c4iw_put_ep(&ep->com); |
| |
| 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("%s ep %p tid %u credits %u\n", |
| __func__, ep, ep->hwtid, credits); |
| if (credits == 0) { |
| pr_debug("%s 0 credit ack ep %p tid %u state %u\n", |
| __func__, ep, ep->hwtid, state_read(&ep->com)); |
| goto out; |
| } |
| |
| dst_confirm(ep->dst); |
| if (ep->mpa_skb) { |
| pr_debug("%s last streaming msg ack ep %p tid %u state %u initiator %u freeing skb\n", |
| __func__, ep, ep->hwtid, |
| state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0); |
| 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("%s ep %p tid %u\n", __func__, 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("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| |
| mutex_lock(&ep->com.mutex); |
| if (ep->com.state != MPA_REQ_RCVD) { |
| err = -ECONNRESET; |
| goto err_out; |
| } |
| |
| BUG_ON(!qp); |
| |
| set_bit(ULP_ACCEPT, &ep->com.history); |
| if ((conn_param->ord > cur_max_read_depth(ep->com.dev)) || |
| (conn_param->ird > cur_max_read_depth(ep->com.dev))) { |
| 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("%s %d ird %d ord %d\n", __func__, __LINE__, 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; |
| } |
| |
| init_timer(&ep->timer); |
| ep->plen = conn_param->private_data_len; |
| if (ep->plen) |
| memcpy(ep->mpa_pkt + sizeof(struct mpa_message), |
| conn_param->private_data, ep->plen); |
| ep->ird = conn_param->ird; |
| ep->ord = conn_param->ord; |
| |
| if (peer2peer && ep->ord == 0) |
| ep->ord = 1; |
| |
| ep->com.cm_id = cm_id; |
| ref_cm_id(&ep->com); |
| ep->com.dev = dev; |
| ep->com.qp = get_qhp(dev, conn_param->qpn); |
| if (!ep->com.qp) { |
| pr_debug("%s qpn 0x%x not found!\n", __func__, conn_param->qpn); |
| err = -EINVAL; |
| goto fail2; |
| } |
| ref_qp(ep); |
| pr_debug("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn, |
| ep->com.qp, cm_id); |
| |
| /* |
| * Allocate an active TID to initiate a TCP connection. |
| */ |
| ep->atid = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep); |
| if (ep->atid == -1) { |
| 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 fail2; |
| } |
| |
| /* find a route */ |
| pr_debug("%s saddr %pI4 sport 0x%x raddr %pI4 rport 0x%x\n", |
| __func__, &laddr->sin_addr, ntohs(laddr->sin_port), |
| ra, ntohs(raddr->sin_port)); |
| ep->dst = 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 fail2; |
| } |
| |
| /* find a route */ |
| pr_debug("%s saddr %pI6 sport 0x%x raddr %pI6 rport 0x%x\n", |
| __func__, laddr6->sin6_addr.s6_addr, |
| ntohs(laddr6->sin6_port), |
| raddr6->sin6_addr.s6_addr, ntohs(raddr6->sin6_port)); |
| ep->dst = 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, 0, |
| 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("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n", |
| __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid, |
| ep->l2t->idx); |
| |
| state_set(&ep->com, CONNECTING); |
| ep->tos = 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_wait); |
| err = cxgb4_create_server6(ep->com.dev->rdev.lldi.ports[0], |
| ep->stid, &sin6->sin6_addr, |
| sin6->sin6_port, |
| ep->com.dev->rdev.lldi.rxq_ids[0]); |
| if (!err) |
| err = c4iw_wait_for_reply(&ep->com.dev->rdev, |
| &ep->com.wr_wait, |
| 0, 0, __func__); |
| else if (err > 0) |
| err = net_xmit_errno(err); |
| if (err) { |
| 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_wait); |
| err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], |
| ep->stid, sin->sin_addr.s_addr, sin->sin_port, |
| 0, ep->com.dev->rdev.lldi.rxq_ids[0]); |
| if (!err) |
| err = c4iw_wait_for_reply(&ep->com.dev->rdev, |
| &ep->com.wr_wait, |
| 0, 0, __func__); |
| else if (err > 0) |
| err = net_xmit_errno(err); |
| } |
| if (err) |
| pr_err("cxgb4_create_server/filter failed err %d stid %d laddr %pI4 lport %d\n" |
| , err, ep->stid, |
| &sin->sin_addr, ntohs(sin->sin_port)); |
| return err; |
| } |
| |
| int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog) |
| { |
| int err = 0; |
| struct c4iw_dev *dev = to_c4iw_dev(cm_id->device); |
| struct c4iw_listen_ep *ep; |
| |
| 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("%s ep %p\n", __func__, 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); |
| |
| memcpy(&ep->com.local_addr, &cm_id->m_local_addr, |
| sizeof(ep->com.local_addr)); |
| |
| 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; |
| } |
| |
| 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("%s ep %p\n", __func__, ep); |
| |
| might_sleep(); |
| state_set(&ep->com, DEAD); |
| if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn && |
| ep->com.local_addr.ss_family == AF_INET) { |
| err = cxgb4_remove_server_filter( |
| ep->com.dev->rdev.lldi.ports[0], ep->stid, |
| ep->com.dev->rdev.lldi.rxq_ids[0], 0); |
| } else { |
| struct sockaddr_in6 *sin6; |
| c4iw_init_wr_wait(&ep->com.wr_wait); |
| err = cxgb4_remove_server( |
| ep->com.dev->rdev.lldi.ports[0], ep->stid, |
| ep->com.dev->rdev.lldi.rxq_ids[0], 0); |
| if (err) |
| goto done; |
| err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, |
| 0, 0, __func__); |
| 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("%s ep %p state %s, abrupt %d\n", __func__, 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("%s ignoring disconnect ep %p state %u\n", |
| __func__, ep, ep->com.state); |
| break; |
| default: |
| BUG(); |
| break; |
| } |
| |
| if (close) { |
| if (abrupt) { |
| set_bit(EP_DISC_ABORT, &ep->com.history); |
| close_complete_upcall(ep, -ECONNRESET); |
| ret = send_abort(ep); |
| } 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; |
| } |
| 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; |
| BUG_ON(!rpl_skb); |
| if (req->retval) { |
| pr_debug("%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; |
| u32 tx_chan; |
| struct neighbour *neigh; |
| |
| /* Drop all non-SYN packets */ |
| if (!(cpl->l2info & cpu_to_be32(RXF_SYN_F))) |
| goto reject; |
| |
| /* |
| * Drop all packets which did not hit the filter. |
| * Unlikely to happen. |
| */ |
| if (!(rss->filter_hit && rss->filter_tid)) |
| goto reject; |
| |
| /* |
| * Calculate the server tid from filter hit index from cpl_rx_pkt. |
| */ |
| stid = (__force int) cpu_to_be32((__force u32) rss->hash_val); |
| |
| lep = (struct c4iw_ep *)get_ep_from_stid(dev, stid); |
| if (!lep) { |
| pr_debug("%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("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__, |
| ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr), |
| ntohs(tcph->source), iph->tos); |
| |
| dst = 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); |
| tx_chan = cxgb4_port_chan(pdev); |
| dev_put(pdev); |
| } else { |
| pdev = get_real_dev(neigh->dev); |
| e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh, |
| pdev, 0); |
| pi = (struct port_info *)netdev_priv(pdev); |
| tx_chan = cxgb4_port_chan(pdev); |
| } |
| neigh_release(neigh); |
| if (!e) { |
| pr_err("%s - failed to allocate l2t entry!\n", |
| __func__); |
| goto free_dst; |
| } |
| |
| step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan; |
| rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step]; |
| window = (__force u16) htons((__force u16)tcph->window); |
| |
| /* Calcuate filter portion for LE region. */ |
| filter = (__force unsigned int) cpu_to_be32(cxgb4_select_ntuple( |
| dev->rdev.lldi.ports[0], |
| e)); |
| |
| /* |
| * Synthesize the cpl_pass_accept_req. We have everything except the |
| * TID. Once firmware sends a reply with TID we update the TID field |
| * in cpl and pass it through the regular cpl_pass_accept_req path. |
| */ |
| build_cpl_pass_accept_req(skb, stid, iph->tos); |
| send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr, |
| tcph->source, ntohl(tcph->seq), filter, window, |
| rss_qid, pi->port_id); |
| cxgb4_l2t_release(e); |
| free_dst: |
| dst_release(dst); |
| reject: |
| 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("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid, |
| ep->com.state); |
| set_bit(TIMEDOUT, &ep->com.history); |
| switch (ep->com.state) { |
| case MPA_REQ_SENT: |
| 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; |
| |
| BUG_ON(!work_handlers[opcode]); |
| ret = work_handlers[opcode](dev, skb); |
| if (!ret) |
| kfree_skb(skb); |
| process_timedout_eps(); |
| } |
| } |
| |
| static DECLARE_WORK(skb_work, process_work); |
| |
| static void ep_timeout(unsigned long arg) |
| { |
| struct c4iw_ep *ep = (struct c4iw_ep *)arg; |
| int kickit = 0; |
| |
| spin_lock(&timeout_lock); |
| if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) { |
| /* |
| * Only insert if it is not already on the list. |
| */ |
| if (!ep->entry.next) { |
| list_add_tail(&ep->entry, &timeout_list); |
| kickit = 1; |
| } |
| } |
| spin_unlock(&timeout_lock); |
| if (kickit) |
| queue_work(workq, &skb_work); |
| } |
| |
| /* |
| * All the CM events are handled on a work queue to have a safe context. |
| */ |
| static int sched(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| |
| /* |
| * Save dev in the skb->cb area. |
| */ |
| *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev; |
| |
| /* |
| * Queue the skb and schedule the worker thread. |
| */ |
| skb_queue_tail(&rxq, skb); |
| queue_work(workq, &skb_work); |
| return 0; |
| } |
| |
| static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct cpl_set_tcb_rpl *rpl = cplhdr(skb); |
| |
| if (rpl->status != CPL_ERR_NONE) { |
| 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("%s type %u\n", __func__, rpl->type); |
| |
| switch (rpl->type) { |
| case FW6_TYPE_WR_RPL: |
| ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff); |
| wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1]; |
| pr_debug("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret); |
| if (wr_waitp) |
| c4iw_wake_up(wr_waitp, ret ? -ret : 0); |
| kfree_skb(skb); |
| break; |
| case FW6_TYPE_CQE: |
| case FW6_TYPE_OFLD_CONNECTION_WR_RPL: |
| sched(dev, skb); |
| break; |
| default: |
| 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("%s Negative advice on abort- tid %u status %d (%s)\n", |
| __func__, ep->hwtid, req->status, |
| neg_adv_str(req->status)); |
| goto out; |
| } |
| pr_debug("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid, |
| ep->com.state); |
| |
| c4iw_wake_up(&ep->com.wr_wait, -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); |
| } |