| /* |
| * Copyright (c) 2006 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 <net/neighbour.h> |
| #include <net/netevent.h> |
| #include <net/route.h> |
| |
| #include "tcb.h" |
| #include "cxgb3_offload.h" |
| #include "iwch.h" |
| #include "iwch_provider.h" |
| #include "iwch_cm.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 ep_timeout_secs = 10; |
| module_param(ep_timeout_secs, int, 0644); |
| MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout " |
| "in seconds (default=10)"); |
| |
| static int mpa_rev = 1; |
| module_param(mpa_rev, int, 0644); |
| MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, " |
| "1 is spec compliant. (default=1)"); |
| |
| static int markers_enabled = 0; |
| 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=256)"); |
| |
| static int snd_win = 32 * 1024; |
| module_param(snd_win, int, 0644); |
| MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)"); |
| |
| static unsigned int nocong = 0; |
| module_param(nocong, uint, 0644); |
| MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)"); |
| |
| static unsigned int cong_flavor = 1; |
| module_param(cong_flavor, uint, 0644); |
| MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)"); |
| |
| static void process_work(struct work_struct *work); |
| static struct workqueue_struct *workq; |
| static DECLARE_WORK(skb_work, process_work); |
| |
| static struct sk_buff_head rxq; |
| static cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS]; |
| |
| 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 iwch_ep *ep, int status); |
| |
| static void start_ep_timer(struct iwch_ep *ep) |
| { |
| PDBG("%s ep %p\n", __func__, ep); |
| if (timer_pending(&ep->timer)) { |
| PDBG("%s stopped / restarted timer ep %p\n", __func__, ep); |
| del_timer_sync(&ep->timer); |
| } else |
| 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 void stop_ep_timer(struct iwch_ep *ep) |
| { |
| PDBG("%s ep %p\n", __func__, ep); |
| if (!timer_pending(&ep->timer)) { |
| printk(KERN_ERR "%s timer stopped when its not running! ep %p state %u\n", |
| __func__, ep, ep->com.state); |
| WARN_ON(1); |
| return; |
| } |
| del_timer_sync(&ep->timer); |
| put_ep(&ep->com); |
| } |
| |
| static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb) |
| { |
| struct cpl_tid_release *req; |
| |
| skb = get_skb(skb, sizeof *req, GFP_KERNEL); |
| if (!skb) |
| return; |
| req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req)); |
| req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid)); |
| skb->priority = CPL_PRIORITY_SETUP; |
| cxgb3_ofld_send(tdev, skb); |
| return; |
| } |
| |
| int iwch_quiesce_tid(struct iwch_ep *ep) |
| { |
| struct cpl_set_tcb_field *req; |
| struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
| |
| if (!skb) |
| return -ENOMEM; |
| req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); |
| req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); |
| OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); |
| req->reply = 0; |
| req->cpu_idx = 0; |
| req->word = htons(W_TCB_RX_QUIESCE); |
| req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); |
| req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE); |
| |
| skb->priority = CPL_PRIORITY_DATA; |
| cxgb3_ofld_send(ep->com.tdev, skb); |
| return 0; |
| } |
| |
| int iwch_resume_tid(struct iwch_ep *ep) |
| { |
| struct cpl_set_tcb_field *req; |
| struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
| |
| if (!skb) |
| return -ENOMEM; |
| req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); |
| req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); |
| OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); |
| req->reply = 0; |
| req->cpu_idx = 0; |
| req->word = htons(W_TCB_RX_QUIESCE); |
| req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); |
| req->val = 0; |
| |
| skb->priority = CPL_PRIORITY_DATA; |
| cxgb3_ofld_send(ep->com.tdev, skb); |
| return 0; |
| } |
| |
| static void set_emss(struct iwch_ep *ep, u16 opt) |
| { |
| PDBG("%s ep %p opt %u\n", __func__, ep, opt); |
| ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40; |
| if (G_TCPOPT_TSTAMP(opt)) |
| ep->emss -= 12; |
| if (ep->emss < 128) |
| ep->emss = 128; |
| PDBG("emss=%d\n", ep->emss); |
| } |
| |
| static enum iwch_ep_state state_read(struct iwch_ep_common *epc) |
| { |
| unsigned long flags; |
| enum iwch_ep_state state; |
| |
| spin_lock_irqsave(&epc->lock, flags); |
| state = epc->state; |
| spin_unlock_irqrestore(&epc->lock, flags); |
| return state; |
| } |
| |
| static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) |
| { |
| epc->state = new; |
| } |
| |
| static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&epc->lock, flags); |
| PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]); |
| __state_set(epc, new); |
| spin_unlock_irqrestore(&epc->lock, flags); |
| return; |
| } |
| |
| static void *alloc_ep(int size, gfp_t gfp) |
| { |
| struct iwch_ep_common *epc; |
| |
| epc = kzalloc(size, gfp); |
| if (epc) { |
| kref_init(&epc->kref); |
| spin_lock_init(&epc->lock); |
| init_waitqueue_head(&epc->waitq); |
| } |
| PDBG("%s alloc ep %p\n", __func__, epc); |
| return epc; |
| } |
| |
| void __free_ep(struct kref *kref) |
| { |
| struct iwch_ep_common *epc; |
| epc = container_of(kref, struct iwch_ep_common, kref); |
| PDBG("%s ep %p state %s\n", __func__, epc, states[state_read(epc)]); |
| kfree(epc); |
| } |
| |
| static void release_ep_resources(struct iwch_ep *ep) |
| { |
| PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
| cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid); |
| dst_release(ep->dst); |
| l2t_release(L2DATA(ep->com.tdev), ep->l2t); |
| put_ep(&ep->com); |
| } |
| |
| static void process_work(struct work_struct *work) |
| { |
| struct sk_buff *skb = NULL; |
| void *ep; |
| struct t3cdev *tdev; |
| int ret; |
| |
| while ((skb = skb_dequeue(&rxq))) { |
| ep = *((void **) (skb->cb)); |
| tdev = *((struct t3cdev **) (skb->cb + sizeof(void *))); |
| ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep); |
| if (ret & CPL_RET_BUF_DONE) |
| kfree_skb(skb); |
| |
| /* |
| * ep was referenced in sched(), and is freed here. |
| */ |
| put_ep((struct iwch_ep_common *)ep); |
| } |
| } |
| |
| 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); |
| } else { |
| skb = alloc_skb(len, gfp); |
| } |
| return skb; |
| } |
| |
| static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip, |
| __be32 peer_ip, __be16 local_port, |
| __be16 peer_port, u8 tos) |
| { |
| struct rtable *rt; |
| struct flowi fl = { |
| .oif = 0, |
| .nl_u = { |
| .ip4_u = { |
| .daddr = peer_ip, |
| .saddr = local_ip, |
| .tos = tos} |
| }, |
| .proto = IPPROTO_TCP, |
| .uli_u = { |
| .ports = { |
| .sport = local_port, |
| .dport = peer_port} |
| } |
| }; |
| |
| if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0)) |
| return NULL; |
| return rt; |
| } |
| |
| static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu) |
| { |
| int i = 0; |
| |
| while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu) |
| ++i; |
| return i; |
| } |
| |
| static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| PDBG("%s t3cdev %p\n", __func__, dev); |
| kfree_skb(skb); |
| } |
| |
| /* |
| * Handle an ARP failure for an active open. |
| */ |
| static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| printk(KERN_ERR MOD "ARP failure duing connect\n"); |
| kfree_skb(skb); |
| } |
| |
| /* |
| * 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(struct t3cdev *dev, struct sk_buff *skb) |
| { |
| struct cpl_abort_req *req = cplhdr(skb); |
| |
| PDBG("%s t3cdev %p\n", __func__, dev); |
| req->cmd = CPL_ABORT_NO_RST; |
| cxgb3_ofld_send(dev, skb); |
| } |
| |
| static int send_halfclose(struct iwch_ep *ep, gfp_t gfp) |
| { |
| struct cpl_close_con_req *req; |
| struct sk_buff *skb; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| skb = get_skb(NULL, sizeof(*req), gfp); |
| if (!skb) { |
| printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); |
| return -ENOMEM; |
| } |
| skb->priority = CPL_PRIORITY_DATA; |
| set_arp_failure_handler(skb, arp_failure_discard); |
| req = (struct cpl_close_con_req *) skb_put(skb, sizeof(*req)); |
| req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); |
| req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); |
| OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid)); |
| l2t_send(ep->com.tdev, skb, ep->l2t); |
| return 0; |
| } |
| |
| static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) |
| { |
| struct cpl_abort_req *req; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| skb = get_skb(skb, sizeof(*req), gfp); |
| if (!skb) { |
| printk(KERN_ERR MOD "%s - failed to alloc skb.\n", |
| __func__); |
| return -ENOMEM; |
| } |
| skb->priority = CPL_PRIORITY_DATA; |
| set_arp_failure_handler(skb, abort_arp_failure); |
| req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req)); |
| req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); |
| req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); |
| OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid)); |
| req->cmd = CPL_ABORT_SEND_RST; |
| l2t_send(ep->com.tdev, skb, ep->l2t); |
| return 0; |
| } |
| |
| static int send_connect(struct iwch_ep *ep) |
| { |
| struct cpl_act_open_req *req; |
| struct sk_buff *skb; |
| u32 opt0h, opt0l, opt2; |
| unsigned int mtu_idx; |
| int wscale; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| |
| skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
| if (!skb) { |
| printk(KERN_ERR MOD "%s - failed to alloc skb.\n", |
| __func__); |
| return -ENOMEM; |
| } |
| mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); |
| wscale = compute_wscale(rcv_win); |
| opt0h = V_NAGLE(0) | |
| V_NO_CONG(nocong) | |
| V_KEEP_ALIVE(1) | |
| F_TCAM_BYPASS | |
| V_WND_SCALE(wscale) | |
| V_MSS_IDX(mtu_idx) | |
| V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); |
| opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); |
| opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor); |
| skb->priority = CPL_PRIORITY_SETUP; |
| set_arp_failure_handler(skb, act_open_req_arp_failure); |
| |
| req = (struct cpl_act_open_req *) skb_put(skb, sizeof(*req)); |
| req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ep->atid)); |
| req->local_port = ep->com.local_addr.sin_port; |
| req->peer_port = ep->com.remote_addr.sin_port; |
| req->local_ip = ep->com.local_addr.sin_addr.s_addr; |
| req->peer_ip = ep->com.remote_addr.sin_addr.s_addr; |
| req->opt0h = htonl(opt0h); |
| req->opt0l = htonl(opt0l); |
| req->params = 0; |
| req->opt2 = htonl(opt2); |
| l2t_send(ep->com.tdev, skb, ep->l2t); |
| return 0; |
| } |
| |
| static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb) |
| { |
| int mpalen; |
| struct tx_data_wr *req; |
| struct mpa_message *mpa; |
| int len; |
| |
| PDBG("%s ep %p pd_len %d\n", __func__, ep, ep->plen); |
| |
| BUG_ON(skb_cloned(skb)); |
| |
| mpalen = sizeof(*mpa) + ep->plen; |
| if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) { |
| kfree_skb(skb); |
| skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL); |
| if (!skb) { |
| connect_reply_upcall(ep, -ENOMEM); |
| return; |
| } |
| } |
| skb_trim(skb, 0); |
| skb_reserve(skb, sizeof(*req)); |
| skb_put(skb, mpalen); |
| skb->priority = CPL_PRIORITY_DATA; |
| mpa = (struct mpa_message *) skb->data; |
| memset(mpa, 0, sizeof(*mpa)); |
| memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)); |
| mpa->flags = (crc_enabled ? MPA_CRC : 0) | |
| (markers_enabled ? MPA_MARKERS : 0); |
| mpa->private_data_size = htons(ep->plen); |
| mpa->revision = mpa_rev; |
| |
| 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 tx_ack() will deref it. |
| */ |
| skb_get(skb); |
| set_arp_failure_handler(skb, arp_failure_discard); |
| skb_reset_transport_header(skb); |
| len = skb->len; |
| req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); |
| req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)); |
| req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
| req->len = htonl(len); |
| req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | |
| V_TX_SNDBUF(snd_win>>15)); |
| req->flags = htonl(F_TX_INIT); |
| req->sndseq = htonl(ep->snd_seq); |
| BUG_ON(ep->mpa_skb); |
| ep->mpa_skb = skb; |
| l2t_send(ep->com.tdev, skb, ep->l2t); |
| start_ep_timer(ep); |
| state_set(&ep->com, MPA_REQ_SENT); |
| return; |
| } |
| |
| static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen) |
| { |
| int mpalen; |
| struct tx_data_wr *req; |
| struct mpa_message *mpa; |
| struct sk_buff *skb; |
| |
| PDBG("%s ep %p plen %d\n", __func__, ep, plen); |
| |
| mpalen = sizeof(*mpa) + plen; |
| |
| skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); |
| if (!skb) { |
| printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); |
| return -ENOMEM; |
| } |
| skb_reserve(skb, sizeof(*req)); |
| mpa = (struct mpa_message *) skb_put(skb, mpalen); |
| memset(mpa, 0, sizeof(*mpa)); |
| memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); |
| mpa->flags = MPA_REJECT; |
| mpa->revision = mpa_rev; |
| mpa->private_data_size = htons(plen); |
| 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 tx_ack() will deref it. |
| */ |
| skb_get(skb); |
| skb->priority = CPL_PRIORITY_DATA; |
| set_arp_failure_handler(skb, arp_failure_discard); |
| skb_reset_transport_header(skb); |
| req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); |
| req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)); |
| req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
| req->len = htonl(mpalen); |
| req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | |
| V_TX_SNDBUF(snd_win>>15)); |
| req->flags = htonl(F_TX_INIT); |
| req->sndseq = htonl(ep->snd_seq); |
| BUG_ON(ep->mpa_skb); |
| ep->mpa_skb = skb; |
| l2t_send(ep->com.tdev, skb, ep->l2t); |
| return 0; |
| } |
| |
| static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen) |
| { |
| int mpalen; |
| struct tx_data_wr *req; |
| struct mpa_message *mpa; |
| int len; |
| struct sk_buff *skb; |
| |
| PDBG("%s ep %p plen %d\n", __func__, ep, plen); |
| |
| mpalen = sizeof(*mpa) + plen; |
| |
| skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); |
| if (!skb) { |
| printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); |
| return -ENOMEM; |
| } |
| skb->priority = CPL_PRIORITY_DATA; |
| skb_reserve(skb, sizeof(*req)); |
| mpa = (struct mpa_message *) skb_put(skb, mpalen); |
| memset(mpa, 0, sizeof(*mpa)); |
| memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); |
| mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) | |
| (markers_enabled ? MPA_MARKERS : 0); |
| mpa->revision = mpa_rev; |
| mpa->private_data_size = htons(plen); |
| 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 tx_ack() will deref it. |
| */ |
| skb_get(skb); |
| set_arp_failure_handler(skb, arp_failure_discard); |
| skb_reset_transport_header(skb); |
| len = skb->len; |
| req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); |
| req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)); |
| req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
| req->len = htonl(len); |
| req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | |
| V_TX_SNDBUF(snd_win>>15)); |
| req->flags = htonl(F_TX_INIT); |
| req->sndseq = htonl(ep->snd_seq); |
| ep->mpa_skb = skb; |
| state_set(&ep->com, MPA_REP_SENT); |
| l2t_send(ep->com.tdev, skb, ep->l2t); |
| return 0; |
| } |
| |
| static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct iwch_ep *ep = ctx; |
| struct cpl_act_establish *req = cplhdr(skb); |
| unsigned int tid = GET_TID(req); |
| |
| PDBG("%s ep %p tid %d\n", __func__, ep, tid); |
| |
| dst_confirm(ep->dst); |
| |
| /* setup the hwtid for this connection */ |
| ep->hwtid = tid; |
| cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid); |
| |
| ep->snd_seq = ntohl(req->snd_isn); |
| ep->rcv_seq = ntohl(req->rcv_isn); |
| |
| set_emss(ep, ntohs(req->tcp_opt)); |
| |
| /* dealloc the atid */ |
| cxgb3_free_atid(ep->com.tdev, ep->atid); |
| |
| /* start MPA negotiation */ |
| send_mpa_req(ep, skb); |
| |
| return 0; |
| } |
| |
| static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) |
| { |
| PDBG("%s ep %p\n", __FILE__, ep); |
| state_set(&ep->com, ABORTING); |
| send_abort(ep, skb, gfp); |
| } |
| |
| static void close_complete_upcall(struct iwch_ep *ep) |
| { |
| struct iw_cm_event event; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_CLOSE; |
| if (ep->com.cm_id) { |
| PDBG("close complete delivered ep %p cm_id %p tid %d\n", |
| ep, ep->com.cm_id, ep->hwtid); |
| ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
| ep->com.cm_id->rem_ref(ep->com.cm_id); |
| ep->com.cm_id = NULL; |
| ep->com.qp = NULL; |
| } |
| } |
| |
| static void peer_close_upcall(struct iwch_ep *ep) |
| { |
| struct iw_cm_event event; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_DISCONNECT; |
| if (ep->com.cm_id) { |
| PDBG("peer close delivered ep %p cm_id %p tid %d\n", |
| ep, ep->com.cm_id, ep->hwtid); |
| ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
| } |
| } |
| |
| static void peer_abort_upcall(struct iwch_ep *ep) |
| { |
| struct iw_cm_event event; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_CLOSE; |
| event.status = -ECONNRESET; |
| if (ep->com.cm_id) { |
| PDBG("abort delivered ep %p cm_id %p tid %d\n", ep, |
| ep->com.cm_id, ep->hwtid); |
| ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
| ep->com.cm_id->rem_ref(ep->com.cm_id); |
| ep->com.cm_id = NULL; |
| ep->com.qp = NULL; |
| } |
| } |
| |
| static void connect_reply_upcall(struct iwch_ep *ep, int status) |
| { |
| struct iw_cm_event event; |
| |
| PDBG("%s ep %p status %d\n", __func__, ep, status); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_CONNECT_REPLY; |
| event.status = status; |
| event.local_addr = ep->com.local_addr; |
| event.remote_addr = ep->com.remote_addr; |
| |
| if ((status == 0) || (status == -ECONNREFUSED)) { |
| event.private_data_len = ep->plen; |
| event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); |
| } |
| if (ep->com.cm_id) { |
| PDBG("%s ep %p tid %d status %d\n", __func__, ep, |
| ep->hwtid, status); |
| ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
| } |
| if (status < 0) { |
| ep->com.cm_id->rem_ref(ep->com.cm_id); |
| ep->com.cm_id = NULL; |
| ep->com.qp = NULL; |
| } |
| } |
| |
| static void connect_request_upcall(struct iwch_ep *ep) |
| { |
| struct iw_cm_event event; |
| |
| PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_CONNECT_REQUEST; |
| event.local_addr = ep->com.local_addr; |
| event.remote_addr = ep->com.remote_addr; |
| event.private_data_len = ep->plen; |
| event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); |
| event.provider_data = ep; |
| if (state_read(&ep->parent_ep->com) != DEAD) |
| ep->parent_ep->com.cm_id->event_handler( |
| ep->parent_ep->com.cm_id, |
| &event); |
| put_ep(&ep->parent_ep->com); |
| ep->parent_ep = NULL; |
| } |
| |
| static void established_upcall(struct iwch_ep *ep) |
| { |
| struct iw_cm_event event; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_ESTABLISHED; |
| if (ep->com.cm_id) { |
| PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
| ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
| } |
| } |
| |
| static int update_rx_credits(struct iwch_ep *ep, u32 credits) |
| { |
| struct cpl_rx_data_ack *req; |
| struct sk_buff *skb; |
| |
| PDBG("%s ep %p credits %u\n", __func__, ep, credits); |
| skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
| if (!skb) { |
| printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n"); |
| return 0; |
| } |
| |
| req = (struct cpl_rx_data_ack *) skb_put(skb, sizeof(*req)); |
| req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid)); |
| req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1)); |
| skb->priority = CPL_PRIORITY_ACK; |
| cxgb3_ofld_send(ep->com.tdev, skb); |
| return credits; |
| } |
| |
| static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb) |
| { |
| struct mpa_message *mpa; |
| u16 plen; |
| struct iwch_qp_attributes attrs; |
| enum iwch_qp_attr_mask mask; |
| int err; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| |
| /* |
| * Stop mpa timer. If it expired, then the state has |
| * changed and we bail since ep_timeout already aborted |
| * the connection. |
| */ |
| stop_ep_timer(ep); |
| if (state_read(&ep->com) != MPA_REQ_SENT) |
| return; |
| |
| /* |
| * If we get more than the supported amount of private data |
| * then we must fail this connection. |
| */ |
| if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { |
| err = -EINVAL; |
| goto err; |
| } |
| |
| /* |
| * copy the new data into our accumulation buffer. |
| */ |
| skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), |
| skb->len); |
| ep->mpa_pkt_len += skb->len; |
| |
| /* |
| * if we don't even have the mpa message, then bail. |
| */ |
| if (ep->mpa_pkt_len < sizeof(*mpa)) |
| return; |
| mpa = (struct mpa_message *) ep->mpa_pkt; |
| |
| /* Validate MPA header. */ |
| if (mpa->revision != mpa_rev) { |
| err = -EPROTO; |
| goto err; |
| } |
| if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { |
| err = -EPROTO; |
| goto err; |
| } |
| |
| plen = ntohs(mpa->private_data_size); |
| |
| /* |
| * Fail if there's too much private data. |
| */ |
| if (plen > MPA_MAX_PRIVATE_DATA) { |
| err = -EPROTO; |
| goto err; |
| } |
| |
| /* |
| * If plen does not account for pkt size |
| */ |
| if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { |
| err = -EPROTO; |
| goto err; |
| } |
| |
| ep->plen = (u8) plen; |
| |
| /* |
| * If we don't have all the pdata yet, then bail. |
| * We'll continue process when more data arrives. |
| */ |
| if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) |
| return; |
| |
| if (mpa->flags & MPA_REJECT) { |
| err = -ECONNREFUSED; |
| goto err; |
| } |
| |
| /* |
| * If we get here we have accumulated the entire mpa |
| * start reply message including private data. And |
| * the MPA header is valid. |
| */ |
| state_set(&ep->com, FPDU_MODE); |
| ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; |
| ep->mpa_attr.recv_marker_enabled = markers_enabled; |
| ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; |
| ep->mpa_attr.version = mpa_rev; |
| PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " |
| "xmit_marker_enabled=%d, version=%d\n", __func__, |
| ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, |
| ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); |
| |
| attrs.mpa_attr = ep->mpa_attr; |
| attrs.max_ird = ep->ird; |
| attrs.max_ord = ep->ord; |
| attrs.llp_stream_handle = ep; |
| attrs.next_state = IWCH_QP_STATE_RTS; |
| |
| mask = IWCH_QP_ATTR_NEXT_STATE | |
| IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR | |
| IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD; |
| |
| /* bind QP and TID with INIT_WR */ |
| err = iwch_modify_qp(ep->com.qp->rhp, |
| ep->com.qp, mask, &attrs, 1); |
| if (!err) |
| goto out; |
| err: |
| abort_connection(ep, skb, GFP_KERNEL); |
| out: |
| connect_reply_upcall(ep, err); |
| return; |
| } |
| |
| static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb) |
| { |
| struct mpa_message *mpa; |
| u16 plen; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| |
| /* |
| * Stop mpa timer. If it expired, then the state has |
| * changed and we bail since ep_timeout already aborted |
| * the connection. |
| */ |
| stop_ep_timer(ep); |
| if (state_read(&ep->com) != MPA_REQ_WAIT) |
| return; |
| |
| /* |
| * 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)) { |
| abort_connection(ep, skb, GFP_KERNEL); |
| return; |
| } |
| |
| PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
| |
| /* |
| * Copy the new data into our accumulation buffer. |
| */ |
| skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), |
| skb->len); |
| ep->mpa_pkt_len += skb->len; |
| |
| /* |
| * If we don't even have the mpa message, then bail. |
| * We'll continue process when more data arrives. |
| */ |
| if (ep->mpa_pkt_len < sizeof(*mpa)) |
| return; |
| PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
| mpa = (struct mpa_message *) ep->mpa_pkt; |
| |
| /* |
| * Validate MPA Header. |
| */ |
| if (mpa->revision != mpa_rev) { |
| abort_connection(ep, skb, GFP_KERNEL); |
| return; |
| } |
| |
| if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) { |
| abort_connection(ep, skb, GFP_KERNEL); |
| return; |
| } |
| |
| plen = ntohs(mpa->private_data_size); |
| |
| /* |
| * Fail if there's too much private data. |
| */ |
| if (plen > MPA_MAX_PRIVATE_DATA) { |
| abort_connection(ep, skb, GFP_KERNEL); |
| return; |
| } |
| |
| /* |
| * If plen does not account for pkt size |
| */ |
| if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { |
| abort_connection(ep, skb, GFP_KERNEL); |
| return; |
| } |
| ep->plen = (u8) plen; |
| |
| /* |
| * If we don't have all the pdata yet, then bail. |
| */ |
| if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) |
| return; |
| |
| /* |
| * If we get here we have accumulated the entire mpa |
| * start reply message including private data. |
| */ |
| ep->mpa_attr.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_rev; |
| PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " |
| "xmit_marker_enabled=%d, version=%d\n", __func__, |
| ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, |
| ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); |
| |
| state_set(&ep->com, MPA_REQ_RCVD); |
| |
| /* drive upcall */ |
| connect_request_upcall(ep); |
| return; |
| } |
| |
| static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct iwch_ep *ep = ctx; |
| struct cpl_rx_data *hdr = cplhdr(skb); |
| unsigned int dlen = ntohs(hdr->len); |
| |
| PDBG("%s ep %p dlen %u\n", __func__, ep, dlen); |
| |
| skb_pull(skb, sizeof(*hdr)); |
| skb_trim(skb, dlen); |
| |
| ep->rcv_seq += dlen; |
| BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen)); |
| |
| switch (state_read(&ep->com)) { |
| case MPA_REQ_SENT: |
| process_mpa_reply(ep, skb); |
| break; |
| case MPA_REQ_WAIT: |
| process_mpa_request(ep, skb); |
| break; |
| case MPA_REP_SENT: |
| break; |
| default: |
| printk(KERN_ERR MOD "%s Unexpected streaming data." |
| " ep %p state %d tid %d\n", |
| __func__, ep, state_read(&ep->com), ep->hwtid); |
| |
| /* |
| * The ep will timeout and inform the ULP of the failure. |
| * See ep_timeout(). |
| */ |
| break; |
| } |
| |
| /* update RX credits */ |
| update_rx_credits(ep, dlen); |
| |
| return CPL_RET_BUF_DONE; |
| } |
| |
| /* |
| * 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 tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct iwch_ep *ep = ctx; |
| struct cpl_wr_ack *hdr = cplhdr(skb); |
| unsigned int credits = ntohs(hdr->credits); |
| |
| PDBG("%s ep %p credits %u\n", __func__, ep, credits); |
| |
| if (credits == 0) |
| return CPL_RET_BUF_DONE; |
| BUG_ON(credits != 1); |
| BUG_ON(ep->mpa_skb == NULL); |
| kfree_skb(ep->mpa_skb); |
| ep->mpa_skb = NULL; |
| dst_confirm(ep->dst); |
| if (state_read(&ep->com) == MPA_REP_SENT) { |
| ep->com.rpl_done = 1; |
| PDBG("waking up ep %p\n", ep); |
| wake_up(&ep->com.waitq); |
| } |
| return CPL_RET_BUF_DONE; |
| } |
| |
| static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct iwch_ep *ep = ctx; |
| unsigned long flags; |
| int release = 0; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| BUG_ON(!ep); |
| |
| /* |
| * We get 2 abort replies from the HW. The first one must |
| * be ignored except for scribbling that we need one more. |
| */ |
| if (!(ep->flags & ABORT_REQ_IN_PROGRESS)) { |
| ep->flags |= ABORT_REQ_IN_PROGRESS; |
| return CPL_RET_BUF_DONE; |
| } |
| |
| spin_lock_irqsave(&ep->com.lock, flags); |
| switch (ep->com.state) { |
| case ABORTING: |
| close_complete_upcall(ep); |
| __state_set(&ep->com, DEAD); |
| release = 1; |
| break; |
| default: |
| printk(KERN_ERR "%s ep %p state %d\n", |
| __func__, ep, ep->com.state); |
| break; |
| } |
| spin_unlock_irqrestore(&ep->com.lock, flags); |
| |
| if (release) |
| release_ep_resources(ep); |
| return CPL_RET_BUF_DONE; |
| } |
| |
| /* |
| * Return whether a failed active open has allocated a TID |
| */ |
| static inline int act_open_has_tid(int status) |
| { |
| return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST && |
| status != CPL_ERR_ARP_MISS; |
| } |
| |
| static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct iwch_ep *ep = ctx; |
| struct cpl_act_open_rpl *rpl = cplhdr(skb); |
| |
| PDBG("%s ep %p status %u errno %d\n", __func__, ep, rpl->status, |
| status2errno(rpl->status)); |
| connect_reply_upcall(ep, status2errno(rpl->status)); |
| state_set(&ep->com, DEAD); |
| if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status)) |
| release_tid(ep->com.tdev, GET_TID(rpl), NULL); |
| cxgb3_free_atid(ep->com.tdev, ep->atid); |
| dst_release(ep->dst); |
| l2t_release(L2DATA(ep->com.tdev), ep->l2t); |
| put_ep(&ep->com); |
| return CPL_RET_BUF_DONE; |
| } |
| |
| static int listen_start(struct iwch_listen_ep *ep) |
| { |
| struct sk_buff *skb; |
| struct cpl_pass_open_req *req; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
| if (!skb) { |
| printk(KERN_ERR MOD "t3c_listen_start failed to alloc skb!\n"); |
| return -ENOMEM; |
| } |
| |
| req = (struct cpl_pass_open_req *) skb_put(skb, sizeof(*req)); |
| req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid)); |
| req->local_port = ep->com.local_addr.sin_port; |
| req->local_ip = ep->com.local_addr.sin_addr.s_addr; |
| req->peer_port = 0; |
| req->peer_ip = 0; |
| req->peer_netmask = 0; |
| req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS); |
| req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10)); |
| req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK)); |
| |
| skb->priority = 1; |
| cxgb3_ofld_send(ep->com.tdev, skb); |
| return 0; |
| } |
| |
| static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct iwch_listen_ep *ep = ctx; |
| struct cpl_pass_open_rpl *rpl = cplhdr(skb); |
| |
| PDBG("%s ep %p status %d error %d\n", __func__, ep, |
| rpl->status, status2errno(rpl->status)); |
| ep->com.rpl_err = status2errno(rpl->status); |
| ep->com.rpl_done = 1; |
| wake_up(&ep->com.waitq); |
| |
| return CPL_RET_BUF_DONE; |
| } |
| |
| static int listen_stop(struct iwch_listen_ep *ep) |
| { |
| struct sk_buff *skb; |
| struct cpl_close_listserv_req *req; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
| if (!skb) { |
| printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); |
| return -ENOMEM; |
| } |
| req = (struct cpl_close_listserv_req *) skb_put(skb, sizeof(*req)); |
| req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| req->cpu_idx = 0; |
| OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid)); |
| skb->priority = 1; |
| cxgb3_ofld_send(ep->com.tdev, skb); |
| return 0; |
| } |
| |
| static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb, |
| void *ctx) |
| { |
| struct iwch_listen_ep *ep = ctx; |
| struct cpl_close_listserv_rpl *rpl = cplhdr(skb); |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| ep->com.rpl_err = status2errno(rpl->status); |
| ep->com.rpl_done = 1; |
| wake_up(&ep->com.waitq); |
| return CPL_RET_BUF_DONE; |
| } |
| |
| static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb) |
| { |
| struct cpl_pass_accept_rpl *rpl; |
| unsigned int mtu_idx; |
| u32 opt0h, opt0l, opt2; |
| int wscale; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| BUG_ON(skb_cloned(skb)); |
| skb_trim(skb, sizeof(*rpl)); |
| skb_get(skb); |
| mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); |
| wscale = compute_wscale(rcv_win); |
| opt0h = V_NAGLE(0) | |
| V_NO_CONG(nocong) | |
| V_KEEP_ALIVE(1) | |
| F_TCAM_BYPASS | |
| V_WND_SCALE(wscale) | |
| V_MSS_IDX(mtu_idx) | |
| V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); |
| opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); |
| opt2 = V_FLAVORS_VALID(1) | V_CONG_CONTROL_FLAVOR(cong_flavor); |
| |
| rpl = cplhdr(skb); |
| rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid)); |
| rpl->peer_ip = peer_ip; |
| rpl->opt0h = htonl(opt0h); |
| rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT); |
| rpl->opt2 = htonl(opt2); |
| rpl->rsvd = rpl->opt2; /* workaround for HW bug */ |
| skb->priority = CPL_PRIORITY_SETUP; |
| l2t_send(ep->com.tdev, skb, ep->l2t); |
| |
| return; |
| } |
| |
| static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip, |
| struct sk_buff *skb) |
| { |
| PDBG("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid, |
| peer_ip); |
| BUG_ON(skb_cloned(skb)); |
| skb_trim(skb, sizeof(struct cpl_tid_release)); |
| skb_get(skb); |
| |
| if (tdev->type != T3A) |
| release_tid(tdev, hwtid, skb); |
| else { |
| struct cpl_pass_accept_rpl *rpl; |
| |
| rpl = cplhdr(skb); |
| skb->priority = CPL_PRIORITY_SETUP; |
| rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); |
| OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, |
| hwtid)); |
| rpl->peer_ip = peer_ip; |
| rpl->opt0h = htonl(F_TCAM_BYPASS); |
| rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT); |
| rpl->opt2 = 0; |
| rpl->rsvd = rpl->opt2; |
| cxgb3_ofld_send(tdev, skb); |
| } |
| } |
| |
| static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct iwch_ep *child_ep, *parent_ep = ctx; |
| struct cpl_pass_accept_req *req = cplhdr(skb); |
| unsigned int hwtid = GET_TID(req); |
| struct dst_entry *dst; |
| struct l2t_entry *l2t; |
| struct rtable *rt; |
| struct iff_mac tim; |
| |
| PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid); |
| |
| if (state_read(&parent_ep->com) != LISTEN) { |
| printk(KERN_ERR "%s - listening ep not in LISTEN\n", |
| __func__); |
| goto reject; |
| } |
| |
| /* |
| * Find the netdev for this connection request. |
| */ |
| tim.mac_addr = req->dst_mac; |
| tim.vlan_tag = ntohs(req->vlan_tag); |
| if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) { |
| printk(KERN_ERR |
| "%s bad dst mac %02x %02x %02x %02x %02x %02x\n", |
| __func__, |
| req->dst_mac[0], |
| req->dst_mac[1], |
| req->dst_mac[2], |
| req->dst_mac[3], |
| req->dst_mac[4], |
| req->dst_mac[5]); |
| goto reject; |
| } |
| |
| /* Find output route */ |
| rt = find_route(tdev, |
| req->local_ip, |
| req->peer_ip, |
| req->local_port, |
| req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid))); |
| if (!rt) { |
| printk(KERN_ERR MOD "%s - failed to find dst entry!\n", |
| __func__); |
| goto reject; |
| } |
| dst = &rt->u.dst; |
| l2t = t3_l2t_get(tdev, dst->neighbour, dst->neighbour->dev); |
| if (!l2t) { |
| printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n", |
| __func__); |
| dst_release(dst); |
| goto reject; |
| } |
| child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL); |
| if (!child_ep) { |
| printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n", |
| __func__); |
| l2t_release(L2DATA(tdev), l2t); |
| dst_release(dst); |
| goto reject; |
| } |
| state_set(&child_ep->com, CONNECTING); |
| child_ep->com.tdev = tdev; |
| child_ep->com.cm_id = NULL; |
| child_ep->com.local_addr.sin_family = PF_INET; |
| child_ep->com.local_addr.sin_port = req->local_port; |
| child_ep->com.local_addr.sin_addr.s_addr = req->local_ip; |
| child_ep->com.remote_addr.sin_family = PF_INET; |
| child_ep->com.remote_addr.sin_port = req->peer_port; |
| child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip; |
| get_ep(&parent_ep->com); |
| child_ep->parent_ep = parent_ep; |
| child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid)); |
| child_ep->l2t = l2t; |
| child_ep->dst = dst; |
| child_ep->hwtid = hwtid; |
| init_timer(&child_ep->timer); |
| cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid); |
| accept_cr(child_ep, req->peer_ip, skb); |
| goto out; |
| reject: |
| reject_cr(tdev, hwtid, req->peer_ip, skb); |
| out: |
| return CPL_RET_BUF_DONE; |
| } |
| |
| static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct iwch_ep *ep = ctx; |
| struct cpl_pass_establish *req = cplhdr(skb); |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| ep->snd_seq = ntohl(req->snd_isn); |
| ep->rcv_seq = ntohl(req->rcv_isn); |
| |
| set_emss(ep, ntohs(req->tcp_opt)); |
| |
| dst_confirm(ep->dst); |
| state_set(&ep->com, MPA_REQ_WAIT); |
| start_ep_timer(ep); |
| |
| return CPL_RET_BUF_DONE; |
| } |
| |
| static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct iwch_ep *ep = ctx; |
| struct iwch_qp_attributes attrs; |
| unsigned long flags; |
| int disconnect = 1; |
| int release = 0; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| dst_confirm(ep->dst); |
| |
| spin_lock_irqsave(&ep->com.lock, flags); |
| 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. |
| */ |
| __state_set(&ep->com, CLOSING); |
| get_ep(&ep->com); |
| break; |
| case MPA_REP_SENT: |
| __state_set(&ep->com, CLOSING); |
| ep->com.rpl_done = 1; |
| ep->com.rpl_err = -ECONNRESET; |
| PDBG("waking up ep %p\n", ep); |
| wake_up(&ep->com.waitq); |
| break; |
| case FPDU_MODE: |
| start_ep_timer(ep); |
| __state_set(&ep->com, CLOSING); |
| attrs.next_state = IWCH_QP_STATE_CLOSING; |
| iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, |
| IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); |
| peer_close_upcall(ep); |
| break; |
| case ABORTING: |
| disconnect = 0; |
| break; |
| case CLOSING: |
| __state_set(&ep->com, MORIBUND); |
| disconnect = 0; |
| break; |
| case MORIBUND: |
| stop_ep_timer(ep); |
| if (ep->com.cm_id && ep->com.qp) { |
| attrs.next_state = IWCH_QP_STATE_IDLE; |
| iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, |
| IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); |
| } |
| close_complete_upcall(ep); |
| __state_set(&ep->com, DEAD); |
| release = 1; |
| disconnect = 0; |
| break; |
| case DEAD: |
| disconnect = 0; |
| break; |
| default: |
| BUG_ON(1); |
| } |
| spin_unlock_irqrestore(&ep->com.lock, flags); |
| if (disconnect) |
| iwch_ep_disconnect(ep, 0, GFP_KERNEL); |
| if (release) |
| release_ep_resources(ep); |
| return CPL_RET_BUF_DONE; |
| } |
| |
| /* |
| * Returns whether an ABORT_REQ_RSS message is a negative advice. |
| */ |
| static int is_neg_adv_abort(unsigned int status) |
| { |
| return status == CPL_ERR_RTX_NEG_ADVICE || |
| status == CPL_ERR_PERSIST_NEG_ADVICE; |
| } |
| |
| static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct cpl_abort_req_rss *req = cplhdr(skb); |
| struct iwch_ep *ep = ctx; |
| struct cpl_abort_rpl *rpl; |
| struct sk_buff *rpl_skb; |
| struct iwch_qp_attributes attrs; |
| int ret; |
| int release = 0; |
| unsigned long flags; |
| |
| if (is_neg_adv_abort(req->status)) { |
| PDBG("%s neg_adv_abort ep %p tid %d\n", __func__, ep, |
| ep->hwtid); |
| t3_l2t_send_event(ep->com.tdev, ep->l2t); |
| return CPL_RET_BUF_DONE; |
| } |
| |
| /* |
| * We get 2 peer aborts from the HW. The first one must |
| * be ignored except for scribbling that we need one more. |
| */ |
| if (!(ep->flags & PEER_ABORT_IN_PROGRESS)) { |
| ep->flags |= PEER_ABORT_IN_PROGRESS; |
| return CPL_RET_BUF_DONE; |
| } |
| |
| spin_lock_irqsave(&ep->com.lock, flags); |
| PDBG("%s ep %p state %u\n", __func__, ep, ep->com.state); |
| switch (ep->com.state) { |
| case CONNECTING: |
| break; |
| case MPA_REQ_WAIT: |
| stop_ep_timer(ep); |
| break; |
| case MPA_REQ_SENT: |
| stop_ep_timer(ep); |
| connect_reply_upcall(ep, -ECONNRESET); |
| break; |
| case MPA_REP_SENT: |
| ep->com.rpl_done = 1; |
| ep->com.rpl_err = -ECONNRESET; |
| PDBG("waking up ep %p\n", ep); |
| wake_up(&ep->com.waitq); |
| 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. |
| */ |
| get_ep(&ep->com); |
| break; |
| case MORIBUND: |
| case CLOSING: |
| stop_ep_timer(ep); |
| /*FALLTHROUGH*/ |
| case FPDU_MODE: |
| if (ep->com.cm_id && ep->com.qp) { |
| attrs.next_state = IWCH_QP_STATE_ERROR; |
| ret = iwch_modify_qp(ep->com.qp->rhp, |
| ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, |
| &attrs, 1); |
| if (ret) |
| printk(KERN_ERR MOD |
| "%s - qp <- error failed!\n", |
| __func__); |
| } |
| peer_abort_upcall(ep); |
| break; |
| case ABORTING: |
| break; |
| case DEAD: |
| PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__); |
| spin_unlock_irqrestore(&ep->com.lock, flags); |
| return CPL_RET_BUF_DONE; |
| default: |
| BUG_ON(1); |
| break; |
| } |
| dst_confirm(ep->dst); |
| if (ep->com.state != ABORTING) { |
| __state_set(&ep->com, DEAD); |
| release = 1; |
| } |
| spin_unlock_irqrestore(&ep->com.lock, flags); |
| |
| rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL); |
| if (!rpl_skb) { |
| printk(KERN_ERR MOD "%s - cannot allocate skb!\n", |
| __func__); |
| release = 1; |
| goto out; |
| } |
| rpl_skb->priority = CPL_PRIORITY_DATA; |
| rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl)); |
| rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); |
| rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); |
| OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid)); |
| rpl->cmd = CPL_ABORT_NO_RST; |
| cxgb3_ofld_send(ep->com.tdev, rpl_skb); |
| out: |
| if (release) |
| release_ep_resources(ep); |
| return CPL_RET_BUF_DONE; |
| } |
| |
| static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct iwch_ep *ep = ctx; |
| struct iwch_qp_attributes attrs; |
| unsigned long flags; |
| int release = 0; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| BUG_ON(!ep); |
| |
| /* The cm_id may be null if we failed to connect */ |
| spin_lock_irqsave(&ep->com.lock, flags); |
| switch (ep->com.state) { |
| case CLOSING: |
| __state_set(&ep->com, MORIBUND); |
| break; |
| case MORIBUND: |
| stop_ep_timer(ep); |
| if ((ep->com.cm_id) && (ep->com.qp)) { |
| attrs.next_state = IWCH_QP_STATE_IDLE; |
| iwch_modify_qp(ep->com.qp->rhp, |
| ep->com.qp, |
| IWCH_QP_ATTR_NEXT_STATE, |
| &attrs, 1); |
| } |
| close_complete_upcall(ep); |
| __state_set(&ep->com, DEAD); |
| release = 1; |
| break; |
| case ABORTING: |
| break; |
| case DEAD: |
| default: |
| BUG_ON(1); |
| break; |
| } |
| spin_unlock_irqrestore(&ep->com.lock, flags); |
| if (release) |
| release_ep_resources(ep); |
| return CPL_RET_BUF_DONE; |
| } |
| |
| /* |
| * T3A does 3 things when a TERM is received: |
| * 1) send up a CPL_RDMA_TERMINATE message with the TERM packet |
| * 2) generate an async event on the QP with the TERMINATE opcode |
| * 3) post a TERMINATE opcde cqe into the associated CQ. |
| * |
| * For (1), we save the message in the qp for later consumer consumption. |
| * For (2), we move the QP into TERMINATE, post a QP event and disconnect. |
| * For (3), we toss the CQE in cxio_poll_cq(). |
| * |
| * terminate() handles case (1)... |
| */ |
| static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct iwch_ep *ep = ctx; |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| skb_pull(skb, sizeof(struct cpl_rdma_terminate)); |
| PDBG("%s saving %d bytes of term msg\n", __func__, skb->len); |
| skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer, |
| skb->len); |
| ep->com.qp->attr.terminate_msg_len = skb->len; |
| ep->com.qp->attr.is_terminate_local = 0; |
| return CPL_RET_BUF_DONE; |
| } |
| |
| static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct cpl_rdma_ec_status *rep = cplhdr(skb); |
| struct iwch_ep *ep = ctx; |
| |
| PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, |
| rep->status); |
| if (rep->status) { |
| struct iwch_qp_attributes attrs; |
| |
| printk(KERN_ERR MOD "%s BAD CLOSE - Aborting tid %u\n", |
| __func__, ep->hwtid); |
| stop_ep_timer(ep); |
| attrs.next_state = IWCH_QP_STATE_ERROR; |
| iwch_modify_qp(ep->com.qp->rhp, |
| ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, |
| &attrs, 1); |
| abort_connection(ep, NULL, GFP_KERNEL); |
| } |
| return CPL_RET_BUF_DONE; |
| } |
| |
| static void ep_timeout(unsigned long arg) |
| { |
| struct iwch_ep *ep = (struct iwch_ep *)arg; |
| struct iwch_qp_attributes attrs; |
| unsigned long flags; |
| int abort = 1; |
| |
| spin_lock_irqsave(&ep->com.lock, flags); |
| PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid, |
| ep->com.state); |
| switch (ep->com.state) { |
| case MPA_REQ_SENT: |
| __state_set(&ep->com, ABORTING); |
| connect_reply_upcall(ep, -ETIMEDOUT); |
| break; |
| case MPA_REQ_WAIT: |
| __state_set(&ep->com, ABORTING); |
| break; |
| case CLOSING: |
| case MORIBUND: |
| if (ep->com.cm_id && ep->com.qp) { |
| attrs.next_state = IWCH_QP_STATE_ERROR; |
| iwch_modify_qp(ep->com.qp->rhp, |
| ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, |
| &attrs, 1); |
| } |
| __state_set(&ep->com, ABORTING); |
| break; |
| default: |
| printk(KERN_ERR "%s unexpected state ep %p state %u\n", |
| __func__, ep, ep->com.state); |
| WARN_ON(1); |
| abort = 0; |
| } |
| spin_unlock_irqrestore(&ep->com.lock, flags); |
| if (abort) |
| abort_connection(ep, NULL, GFP_ATOMIC); |
| put_ep(&ep->com); |
| } |
| |
| int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) |
| { |
| int err; |
| struct iwch_ep *ep = to_ep(cm_id); |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| |
| if (state_read(&ep->com) == DEAD) { |
| put_ep(&ep->com); |
| return -ECONNRESET; |
| } |
| BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); |
| if (mpa_rev == 0) |
| abort_connection(ep, NULL, GFP_KERNEL); |
| else { |
| err = send_mpa_reject(ep, pdata, pdata_len); |
| err = iwch_ep_disconnect(ep, 0, GFP_KERNEL); |
| } |
| return 0; |
| } |
| |
| int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
| { |
| int err; |
| struct iwch_qp_attributes attrs; |
| enum iwch_qp_attr_mask mask; |
| struct iwch_ep *ep = to_ep(cm_id); |
| struct iwch_dev *h = to_iwch_dev(cm_id->device); |
| struct iwch_qp *qp = get_qhp(h, conn_param->qpn); |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| if (state_read(&ep->com) == DEAD) |
| return -ECONNRESET; |
| |
| BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); |
| BUG_ON(!qp); |
| |
| if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) || |
| (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) { |
| abort_connection(ep, NULL, GFP_KERNEL); |
| return -EINVAL; |
| } |
| |
| cm_id->add_ref(cm_id); |
| ep->com.cm_id = cm_id; |
| ep->com.qp = qp; |
| |
| ep->com.rpl_done = 0; |
| ep->com.rpl_err = 0; |
| ep->ird = conn_param->ird; |
| ep->ord = conn_param->ord; |
| PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord); |
| |
| get_ep(&ep->com); |
| |
| /* 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 = IWCH_QP_STATE_RTS; |
| |
| /* bind QP and TID with INIT_WR */ |
| mask = IWCH_QP_ATTR_NEXT_STATE | |
| IWCH_QP_ATTR_LLP_STREAM_HANDLE | |
| IWCH_QP_ATTR_MPA_ATTR | |
| IWCH_QP_ATTR_MAX_IRD | |
| IWCH_QP_ATTR_MAX_ORD; |
| |
| err = iwch_modify_qp(ep->com.qp->rhp, |
| ep->com.qp, mask, &attrs, 1); |
| if (err) |
| goto err; |
| |
| err = send_mpa_reply(ep, conn_param->private_data, |
| conn_param->private_data_len); |
| if (err) |
| goto err; |
| |
| /* wait for wr_ack */ |
| wait_event(ep->com.waitq, ep->com.rpl_done); |
| err = ep->com.rpl_err; |
| if (err) |
| goto err; |
| |
| state_set(&ep->com, FPDU_MODE); |
| established_upcall(ep); |
| put_ep(&ep->com); |
| return 0; |
| err: |
| ep->com.cm_id = NULL; |
| ep->com.qp = NULL; |
| cm_id->rem_ref(cm_id); |
| put_ep(&ep->com); |
| return err; |
| } |
| |
| static int is_loopback_dst(struct iw_cm_id *cm_id) |
| { |
| struct net_device *dev; |
| |
| dev = ip_dev_find(&init_net, cm_id->remote_addr.sin_addr.s_addr); |
| if (!dev) |
| return 0; |
| dev_put(dev); |
| return 1; |
| } |
| |
| int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
| { |
| int err = 0; |
| struct iwch_dev *h = to_iwch_dev(cm_id->device); |
| struct iwch_ep *ep; |
| struct rtable *rt; |
| |
| if (is_loopback_dst(cm_id)) { |
| err = -ENOSYS; |
| goto out; |
| } |
| |
| ep = alloc_ep(sizeof(*ep), GFP_KERNEL); |
| if (!ep) { |
| printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); |
| err = -ENOMEM; |
| goto out; |
| } |
| init_timer(&ep->timer); |
| ep->plen = conn_param->private_data_len; |
| if (ep->plen) |
| memcpy(ep->mpa_pkt + sizeof(struct mpa_message), |
| conn_param->private_data, ep->plen); |
| ep->ird = conn_param->ird; |
| ep->ord = conn_param->ord; |
| ep->com.tdev = h->rdev.t3cdev_p; |
| |
| cm_id->add_ref(cm_id); |
| ep->com.cm_id = cm_id; |
| ep->com.qp = get_qhp(h, conn_param->qpn); |
| BUG_ON(!ep->com.qp); |
| PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn, |
| ep->com.qp, cm_id); |
| |
| /* |
| * Allocate an active TID to initiate a TCP connection. |
| */ |
| ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep); |
| if (ep->atid == -1) { |
| printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); |
| err = -ENOMEM; |
| goto fail2; |
| } |
| |
| /* find a route */ |
| rt = find_route(h->rdev.t3cdev_p, |
| cm_id->local_addr.sin_addr.s_addr, |
| cm_id->remote_addr.sin_addr.s_addr, |
| cm_id->local_addr.sin_port, |
| cm_id->remote_addr.sin_port, IPTOS_LOWDELAY); |
| if (!rt) { |
| printk(KERN_ERR MOD "%s - cannot find route.\n", __func__); |
| err = -EHOSTUNREACH; |
| goto fail3; |
| } |
| ep->dst = &rt->u.dst; |
| |
| /* get a l2t entry */ |
| ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst->neighbour, |
| ep->dst->neighbour->dev); |
| if (!ep->l2t) { |
| printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__); |
| err = -ENOMEM; |
| goto fail4; |
| } |
| |
| state_set(&ep->com, CONNECTING); |
| ep->tos = IPTOS_LOWDELAY; |
| ep->com.local_addr = cm_id->local_addr; |
| ep->com.remote_addr = cm_id->remote_addr; |
| |
| /* send connect request to rnic */ |
| err = send_connect(ep); |
| if (!err) |
| goto out; |
| |
| l2t_release(L2DATA(h->rdev.t3cdev_p), ep->l2t); |
| fail4: |
| dst_release(ep->dst); |
| fail3: |
| cxgb3_free_atid(ep->com.tdev, ep->atid); |
| fail2: |
| put_ep(&ep->com); |
| out: |
| return err; |
| } |
| |
| int iwch_create_listen(struct iw_cm_id *cm_id, int backlog) |
| { |
| int err = 0; |
| struct iwch_dev *h = to_iwch_dev(cm_id->device); |
| struct iwch_listen_ep *ep; |
| |
| |
| might_sleep(); |
| |
| ep = alloc_ep(sizeof(*ep), GFP_KERNEL); |
| if (!ep) { |
| printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); |
| err = -ENOMEM; |
| goto fail1; |
| } |
| PDBG("%s ep %p\n", __func__, ep); |
| ep->com.tdev = h->rdev.t3cdev_p; |
| cm_id->add_ref(cm_id); |
| ep->com.cm_id = cm_id; |
| ep->backlog = backlog; |
| ep->com.local_addr = cm_id->local_addr; |
| |
| /* |
| * Allocate a server TID. |
| */ |
| ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep); |
| if (ep->stid == -1) { |
| printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); |
| err = -ENOMEM; |
| goto fail2; |
| } |
| |
| state_set(&ep->com, LISTEN); |
| err = listen_start(ep); |
| if (err) |
| goto fail3; |
| |
| /* wait for pass_open_rpl */ |
| wait_event(ep->com.waitq, ep->com.rpl_done); |
| err = ep->com.rpl_err; |
| if (!err) { |
| cm_id->provider_data = ep; |
| goto out; |
| } |
| fail3: |
| cxgb3_free_stid(ep->com.tdev, ep->stid); |
| fail2: |
| cm_id->rem_ref(cm_id); |
| put_ep(&ep->com); |
| fail1: |
| out: |
| return err; |
| } |
| |
| int iwch_destroy_listen(struct iw_cm_id *cm_id) |
| { |
| int err; |
| struct iwch_listen_ep *ep = to_listen_ep(cm_id); |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| |
| might_sleep(); |
| state_set(&ep->com, DEAD); |
| ep->com.rpl_done = 0; |
| ep->com.rpl_err = 0; |
| err = listen_stop(ep); |
| wait_event(ep->com.waitq, ep->com.rpl_done); |
| cxgb3_free_stid(ep->com.tdev, ep->stid); |
| err = ep->com.rpl_err; |
| cm_id->rem_ref(cm_id); |
| put_ep(&ep->com); |
| return err; |
| } |
| |
| int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp) |
| { |
| int ret=0; |
| unsigned long flags; |
| int close = 0; |
| |
| spin_lock_irqsave(&ep->com.lock, flags); |
| |
| PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep, |
| states[ep->com.state], abrupt); |
| |
| switch (ep->com.state) { |
| case MPA_REQ_WAIT: |
| case MPA_REQ_SENT: |
| case MPA_REQ_RCVD: |
| case MPA_REP_SENT: |
| case FPDU_MODE: |
| close = 1; |
| if (abrupt) |
| ep->com.state = ABORTING; |
| else { |
| ep->com.state = CLOSING; |
| start_ep_timer(ep); |
| } |
| break; |
| case CLOSING: |
| close = 1; |
| if (abrupt) { |
| stop_ep_timer(ep); |
| ep->com.state = ABORTING; |
| } else |
| ep->com.state = MORIBUND; |
| break; |
| case MORIBUND: |
| case ABORTING: |
| case DEAD: |
| PDBG("%s ignoring disconnect ep %p state %u\n", |
| __func__, ep, ep->com.state); |
| break; |
| default: |
| BUG(); |
| break; |
| } |
| |
| spin_unlock_irqrestore(&ep->com.lock, flags); |
| if (close) { |
| if (abrupt) |
| ret = send_abort(ep, NULL, gfp); |
| else |
| ret = send_halfclose(ep, gfp); |
| } |
| return ret; |
| } |
| |
| int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, |
| struct l2t_entry *l2t) |
| { |
| struct iwch_ep *ep = ctx; |
| |
| if (ep->dst != old) |
| return 0; |
| |
| PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new, |
| l2t); |
| dst_hold(new); |
| l2t_release(L2DATA(ep->com.tdev), ep->l2t); |
| ep->l2t = l2t; |
| dst_release(old); |
| ep->dst = new; |
| return 1; |
| } |
| |
| /* |
| * All the CM events are handled on a work queue to have a safe context. |
| */ |
| static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct iwch_ep_common *epc = ctx; |
| |
| get_ep(epc); |
| |
| /* |
| * Save ctx and tdev in the skb->cb area. |
| */ |
| *((void **) skb->cb) = ctx; |
| *((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev; |
| |
| /* |
| * 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 t3cdev *tdev, struct sk_buff *skb, void *ctx) |
| { |
| struct cpl_set_tcb_rpl *rpl = cplhdr(skb); |
| |
| if (rpl->status != CPL_ERR_NONE) { |
| printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u " |
| "for tid %u\n", rpl->status, GET_TID(rpl)); |
| } |
| return CPL_RET_BUF_DONE; |
| } |
| |
| int __init iwch_cm_init(void) |
| { |
| skb_queue_head_init(&rxq); |
| |
| workq = create_singlethread_workqueue("iw_cxgb3"); |
| if (!workq) |
| return -ENOMEM; |
| |
| /* |
| * All upcalls from the T3 Core go to sched() to |
| * schedule the processing on a work queue. |
| */ |
| t3c_handlers[CPL_ACT_ESTABLISH] = sched; |
| t3c_handlers[CPL_ACT_OPEN_RPL] = sched; |
| t3c_handlers[CPL_RX_DATA] = sched; |
| t3c_handlers[CPL_TX_DMA_ACK] = sched; |
| t3c_handlers[CPL_ABORT_RPL_RSS] = sched; |
| t3c_handlers[CPL_ABORT_RPL] = sched; |
| t3c_handlers[CPL_PASS_OPEN_RPL] = sched; |
| t3c_handlers[CPL_CLOSE_LISTSRV_RPL] = sched; |
| t3c_handlers[CPL_PASS_ACCEPT_REQ] = sched; |
| t3c_handlers[CPL_PASS_ESTABLISH] = sched; |
| t3c_handlers[CPL_PEER_CLOSE] = sched; |
| t3c_handlers[CPL_CLOSE_CON_RPL] = sched; |
| t3c_handlers[CPL_ABORT_REQ_RSS] = sched; |
| t3c_handlers[CPL_RDMA_TERMINATE] = sched; |
| t3c_handlers[CPL_RDMA_EC_STATUS] = sched; |
| t3c_handlers[CPL_SET_TCB_RPL] = set_tcb_rpl; |
| |
| /* |
| * These are the real handlers that are called from a |
| * work queue. |
| */ |
| work_handlers[CPL_ACT_ESTABLISH] = act_establish; |
| work_handlers[CPL_ACT_OPEN_RPL] = act_open_rpl; |
| work_handlers[CPL_RX_DATA] = rx_data; |
| work_handlers[CPL_TX_DMA_ACK] = tx_ack; |
| work_handlers[CPL_ABORT_RPL_RSS] = abort_rpl; |
| work_handlers[CPL_ABORT_RPL] = abort_rpl; |
| work_handlers[CPL_PASS_OPEN_RPL] = pass_open_rpl; |
| work_handlers[CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl; |
| work_handlers[CPL_PASS_ACCEPT_REQ] = pass_accept_req; |
| work_handlers[CPL_PASS_ESTABLISH] = pass_establish; |
| work_handlers[CPL_PEER_CLOSE] = peer_close; |
| work_handlers[CPL_ABORT_REQ_RSS] = peer_abort; |
| work_handlers[CPL_CLOSE_CON_RPL] = close_con_rpl; |
| work_handlers[CPL_RDMA_TERMINATE] = terminate; |
| work_handlers[CPL_RDMA_EC_STATUS] = ec_status; |
| return 0; |
| } |
| |
| void __exit iwch_cm_term(void) |
| { |
| flush_workqueue(workq); |
| destroy_workqueue(workq); |
| } |