| /* |
| * Copyright (c) 2009-2010 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 <net/neighbour.h> |
| #include <net/netevent.h> |
| #include <net/route.h> |
| |
| #include "iw_cxgb4.h" |
| |
| static char *states[] = { |
| "idle", |
| "listen", |
| "connecting", |
| "mpa_wait_req", |
| "mpa_req_sent", |
| "mpa_req_rcvd", |
| "mpa_rep_sent", |
| "fpdu_mode", |
| "aborting", |
| "closing", |
| "moribund", |
| "dead", |
| NULL, |
| }; |
| |
| static int dack_mode = 1; |
| module_param(dack_mode, int, 0644); |
| MODULE_PARM_DESC(dack_mode, "Delayed ack mode (default=1)"); |
| |
| int c4iw_max_read_depth = 8; |
| module_param(c4iw_max_read_depth, int, 0644); |
| MODULE_PARM_DESC(c4iw_max_read_depth, "Per-connection max ORD/IRD (default=8)"); |
| |
| static int enable_tcp_timestamps; |
| module_param(enable_tcp_timestamps, int, 0644); |
| MODULE_PARM_DESC(enable_tcp_timestamps, "Enable tcp timestamps (default=0)"); |
| |
| static int enable_tcp_sack; |
| module_param(enable_tcp_sack, int, 0644); |
| MODULE_PARM_DESC(enable_tcp_sack, "Enable tcp SACK (default=0)"); |
| |
| static int enable_tcp_window_scaling = 1; |
| module_param(enable_tcp_window_scaling, int, 0644); |
| MODULE_PARM_DESC(enable_tcp_window_scaling, |
| "Enable tcp window scaling (default=1)"); |
| |
| int c4iw_debug; |
| module_param(c4iw_debug, int, 0644); |
| MODULE_PARM_DESC(c4iw_debug, "Enable debug logging (default=0)"); |
| |
| static int peer2peer; |
| module_param(peer2peer, int, 0644); |
| MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)"); |
| |
| static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ; |
| module_param(p2p_type, int, 0644); |
| MODULE_PARM_DESC(p2p_type, "RDMAP opcode to use for the RTR message: " |
| "1=RDMA_READ 0=RDMA_WRITE (default 1)"); |
| |
| static int ep_timeout_secs = 60; |
| module_param(ep_timeout_secs, int, 0644); |
| MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout " |
| "in seconds (default=60)"); |
| |
| static int mpa_rev = 1; |
| module_param(mpa_rev, int, 0644); |
| MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, " |
| "1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft" |
| " compliant (default=1)"); |
| |
| static int markers_enabled; |
| module_param(markers_enabled, int, 0644); |
| MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)"); |
| |
| static int crc_enabled = 1; |
| module_param(crc_enabled, int, 0644); |
| MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)"); |
| |
| static int rcv_win = 256 * 1024; |
| module_param(rcv_win, int, 0644); |
| MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256KB)"); |
| |
| static int snd_win = 128 * 1024; |
| module_param(snd_win, int, 0644); |
| MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=128KB)"); |
| |
| static struct workqueue_struct *workq; |
| |
| static struct sk_buff_head rxq; |
| |
| static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp); |
| static void ep_timeout(unsigned long arg); |
| static void connect_reply_upcall(struct c4iw_ep *ep, int status); |
| |
| static LIST_HEAD(timeout_list); |
| static spinlock_t timeout_lock; |
| |
| static void start_ep_timer(struct c4iw_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 |
| 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 void stop_ep_timer(struct c4iw_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); |
| c4iw_put_ep(&ep->com); |
| } |
| |
| static int c4iw_l2t_send(struct c4iw_rdev *rdev, struct sk_buff *skb, |
| struct l2t_entry *l2e) |
| { |
| int error = 0; |
| |
| if (c4iw_fatal_error(rdev)) { |
| kfree_skb(skb); |
| PDBG("%s - device in error state - dropping\n", __func__); |
| return -EIO; |
| } |
| error = cxgb4_l2t_send(rdev->lldi.ports[0], skb, l2e); |
| if (error < 0) |
| kfree_skb(skb); |
| return error < 0 ? error : 0; |
| } |
| |
| int c4iw_ofld_send(struct c4iw_rdev *rdev, struct sk_buff *skb) |
| { |
| int error = 0; |
| |
| if (c4iw_fatal_error(rdev)) { |
| kfree_skb(skb); |
| PDBG("%s - device in error state - dropping\n", __func__); |
| return -EIO; |
| } |
| error = cxgb4_ofld_send(rdev->lldi.ports[0], skb); |
| if (error < 0) |
| kfree_skb(skb); |
| return error < 0 ? error : 0; |
| } |
| |
| static void release_tid(struct c4iw_rdev *rdev, u32 hwtid, struct sk_buff *skb) |
| { |
| struct cpl_tid_release *req; |
| |
| skb = get_skb(skb, sizeof *req, GFP_KERNEL); |
| if (!skb) |
| return; |
| req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req)); |
| INIT_TP_WR(req, hwtid); |
| OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid)); |
| set_wr_txq(skb, CPL_PRIORITY_SETUP, 0); |
| c4iw_ofld_send(rdev, skb); |
| return; |
| } |
| |
| static void set_emss(struct c4iw_ep *ep, u16 opt) |
| { |
| ep->emss = ep->com.dev->rdev.lldi.mtus[GET_TCPOPT_MSS(opt)] - 40; |
| ep->mss = ep->emss; |
| if (GET_TCPOPT_TSTAMP(opt)) |
| ep->emss -= 12; |
| if (ep->emss < 128) |
| ep->emss = 128; |
| PDBG("%s mss_idx %u mss %u emss=%u\n", __func__, GET_TCPOPT_MSS(opt), |
| ep->mss, ep->emss); |
| } |
| |
| static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc) |
| { |
| enum c4iw_ep_state state; |
| |
| mutex_lock(&epc->mutex); |
| state = epc->state; |
| mutex_unlock(&epc->mutex); |
| return state; |
| } |
| |
| static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new) |
| { |
| epc->state = new; |
| } |
| |
| static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new) |
| { |
| mutex_lock(&epc->mutex); |
| PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]); |
| __state_set(epc, new); |
| mutex_unlock(&epc->mutex); |
| return; |
| } |
| |
| static void *alloc_ep(int size, gfp_t gfp) |
| { |
| struct c4iw_ep_common *epc; |
| |
| epc = kzalloc(size, gfp); |
| if (epc) { |
| kref_init(&epc->kref); |
| mutex_init(&epc->mutex); |
| c4iw_init_wr_wait(&epc->wr_wait); |
| } |
| PDBG("%s alloc ep %p\n", __func__, epc); |
| return epc; |
| } |
| |
| void _c4iw_free_ep(struct kref *kref) |
| { |
| struct c4iw_ep *ep; |
| |
| ep = container_of(kref, struct c4iw_ep, com.kref); |
| PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]); |
| if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) { |
| cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid); |
| dst_release(ep->dst); |
| cxgb4_l2t_release(ep->l2t); |
| } |
| kfree(ep); |
| } |
| |
| static void release_ep_resources(struct c4iw_ep *ep) |
| { |
| set_bit(RELEASE_RESOURCES, &ep->com.flags); |
| c4iw_put_ep(&ep->com); |
| } |
| |
| static int status2errno(int status) |
| { |
| switch (status) { |
| case CPL_ERR_NONE: |
| return 0; |
| case CPL_ERR_CONN_RESET: |
| return -ECONNRESET; |
| case CPL_ERR_ARP_MISS: |
| return -EHOSTUNREACH; |
| case CPL_ERR_CONN_TIMEDOUT: |
| return -ETIMEDOUT; |
| case CPL_ERR_TCAM_FULL: |
| return -ENOMEM; |
| case CPL_ERR_CONN_EXIST: |
| return -EADDRINUSE; |
| default: |
| return -EIO; |
| } |
| } |
| |
| /* |
| * Try and reuse skbs already allocated... |
| */ |
| static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp) |
| { |
| if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) { |
| skb_trim(skb, 0); |
| skb_get(skb); |
| skb_reset_transport_header(skb); |
| } else { |
| skb = alloc_skb(len, gfp); |
| } |
| return skb; |
| } |
| |
| static struct rtable *find_route(struct c4iw_dev *dev, __be32 local_ip, |
| __be32 peer_ip, __be16 local_port, |
| __be16 peer_port, u8 tos) |
| { |
| struct rtable *rt; |
| struct flowi4 fl4; |
| |
| rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip, |
| peer_port, local_port, IPPROTO_TCP, |
| tos, 0); |
| if (IS_ERR(rt)) |
| return NULL; |
| return rt; |
| } |
| |
| static void arp_failure_discard(void *handle, struct sk_buff *skb) |
| { |
| PDBG("%s c4iw_dev %p\n", __func__, handle); |
| kfree_skb(skb); |
| } |
| |
| /* |
| * Handle an ARP failure for an active open. |
| */ |
| static void act_open_req_arp_failure(void *handle, struct sk_buff *skb) |
| { |
| 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(void *handle, struct sk_buff *skb) |
| { |
| struct c4iw_rdev *rdev = handle; |
| struct cpl_abort_req *req = cplhdr(skb); |
| |
| PDBG("%s rdev %p\n", __func__, rdev); |
| req->cmd = CPL_ABORT_NO_RST; |
| c4iw_ofld_send(rdev, skb); |
| } |
| |
| static void send_flowc(struct c4iw_ep *ep, struct sk_buff *skb) |
| { |
| unsigned int flowclen = 80; |
| struct fw_flowc_wr *flowc; |
| int i; |
| |
| skb = get_skb(skb, flowclen, GFP_KERNEL); |
| flowc = (struct fw_flowc_wr *)__skb_put(skb, flowclen); |
| |
| flowc->op_to_nparams = cpu_to_be32(FW_WR_OP(FW_FLOWC_WR) | |
| FW_FLOWC_WR_NPARAMS(8)); |
| flowc->flowid_len16 = cpu_to_be32(FW_WR_LEN16(DIV_ROUND_UP(flowclen, |
| 16)) | FW_WR_FLOWID(ep->hwtid)); |
| |
| flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN; |
| flowc->mnemval[0].val = cpu_to_be32(PCI_FUNC(ep->com.dev->rdev.lldi.pdev->devfn) << 8); |
| 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(snd_win); |
| flowc->mnemval[7].mnemonic = FW_FLOWC_MNEM_MSS; |
| flowc->mnemval[7].val = cpu_to_be32(ep->emss); |
| /* Pad WR to 16 byte boundary */ |
| flowc->mnemval[8].mnemonic = 0; |
| flowc->mnemval[8].val = 0; |
| for (i = 0; i < 9; i++) { |
| flowc->mnemval[i].r4[0] = 0; |
| flowc->mnemval[i].r4[1] = 0; |
| flowc->mnemval[i].r4[2] = 0; |
| } |
| |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); |
| c4iw_ofld_send(&ep->com.dev->rdev, skb); |
| } |
| |
| static int send_halfclose(struct c4iw_ep *ep, gfp_t gfp) |
| { |
| struct cpl_close_con_req *req; |
| struct sk_buff *skb; |
| int wrlen = roundup(sizeof *req, 16); |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| skb = get_skb(NULL, wrlen, gfp); |
| if (!skb) { |
| printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); |
| return -ENOMEM; |
| } |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); |
| t4_set_arp_err_handler(skb, NULL, arp_failure_discard); |
| req = (struct cpl_close_con_req *) skb_put(skb, wrlen); |
| memset(req, 0, wrlen); |
| INIT_TP_WR(req, ep->hwtid); |
| OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, |
| ep->hwtid)); |
| return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); |
| } |
| |
| static int send_abort(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp) |
| { |
| struct cpl_abort_req *req; |
| int wrlen = roundup(sizeof *req, 16); |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| skb = get_skb(skb, wrlen, gfp); |
| if (!skb) { |
| printk(KERN_ERR MOD "%s - failed to alloc skb.\n", |
| __func__); |
| return -ENOMEM; |
| } |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); |
| t4_set_arp_err_handler(skb, &ep->com.dev->rdev, abort_arp_failure); |
| req = (struct cpl_abort_req *) skb_put(skb, wrlen); |
| memset(req, 0, wrlen); |
| INIT_TP_WR(req, ep->hwtid); |
| OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid)); |
| req->cmd = CPL_ABORT_SEND_RST; |
| return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); |
| } |
| |
| static int send_connect(struct c4iw_ep *ep) |
| { |
| struct cpl_act_open_req *req; |
| struct sk_buff *skb; |
| u64 opt0; |
| u32 opt2; |
| unsigned int mtu_idx; |
| int wscale; |
| int wrlen = roundup(sizeof *req, 16); |
| |
| PDBG("%s ep %p atid %u\n", __func__, ep, ep->atid); |
| |
| skb = get_skb(NULL, wrlen, GFP_KERNEL); |
| if (!skb) { |
| printk(KERN_ERR MOD "%s - failed to alloc skb.\n", |
| __func__); |
| return -ENOMEM; |
| } |
| set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx); |
| |
| cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx); |
| wscale = compute_wscale(rcv_win); |
| opt0 = KEEP_ALIVE(1) | |
| DELACK(1) | |
| WND_SCALE(wscale) | |
| MSS_IDX(mtu_idx) | |
| L2T_IDX(ep->l2t->idx) | |
| TX_CHAN(ep->tx_chan) | |
| SMAC_SEL(ep->smac_idx) | |
| DSCP(ep->tos) | |
| ULP_MODE(ULP_MODE_TCPDDP) | |
| RCV_BUFSIZ(rcv_win>>10); |
| opt2 = RX_CHANNEL(0) | |
| RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid); |
| if (enable_tcp_timestamps) |
| opt2 |= TSTAMPS_EN(1); |
| if (enable_tcp_sack) |
| opt2 |= SACK_EN(1); |
| if (wscale && enable_tcp_window_scaling) |
| opt2 |= WND_SCALE_EN(1); |
| t4_set_arp_err_handler(skb, NULL, act_open_req_arp_failure); |
| |
| req = (struct cpl_act_open_req *) skb_put(skb, wrlen); |
| INIT_TP_WR(req, 0); |
| OPCODE_TID(req) = cpu_to_be32( |
| MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ((ep->rss_qid<<14)|ep->atid))); |
| req->local_port = 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->opt0 = cpu_to_be64(opt0); |
| req->params = 0; |
| req->opt2 = cpu_to_be32(opt2); |
| return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); |
| } |
| |
| static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb, |
| u8 mpa_rev_to_use) |
| { |
| int mpalen, wrlen; |
| struct fw_ofld_tx_data_wr *req; |
| struct mpa_message *mpa; |
| struct mpa_v2_conn_params mpa_v2_params; |
| |
| PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen); |
| |
| BUG_ON(skb_cloned(skb)); |
| |
| mpalen = sizeof(*mpa) + ep->plen; |
| if (mpa_rev_to_use == 2) |
| mpalen += sizeof(struct mpa_v2_conn_params); |
| wrlen = roundup(mpalen + sizeof *req, 16); |
| skb = get_skb(skb, wrlen, GFP_KERNEL); |
| if (!skb) { |
| connect_reply_upcall(ep, -ENOMEM); |
| return; |
| } |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); |
| |
| req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen); |
| memset(req, 0, wrlen); |
| req->op_to_immdlen = cpu_to_be32( |
| FW_WR_OP(FW_OFLD_TX_DATA_WR) | |
| FW_WR_COMPL(1) | |
| FW_WR_IMMDLEN(mpalen)); |
| req->flowid_len16 = cpu_to_be32( |
| FW_WR_FLOWID(ep->hwtid) | |
| FW_WR_LEN16(wrlen >> 4)); |
| req->plen = cpu_to_be32(mpalen); |
| req->tunnel_to_proxy = cpu_to_be32( |
| FW_OFLD_TX_DATA_WR_FLUSH(1) | |
| FW_OFLD_TX_DATA_WR_SHOVE(1)); |
| |
| mpa = (struct mpa_message *)(req + 1); |
| memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)); |
| mpa->flags = (crc_enabled ? MPA_CRC : 0) | |
| (markers_enabled ? MPA_MARKERS : 0) | |
| (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0); |
| mpa->private_data_size = htons(ep->plen); |
| mpa->revision = mpa_rev_to_use; |
| if (mpa_rev_to_use == 1) { |
| ep->tried_with_mpa_v1 = 1; |
| ep->retry_with_mpa_v1 = 0; |
| } |
| |
| if (mpa_rev_to_use == 2) { |
| mpa->private_data_size += |
| htons(sizeof(struct mpa_v2_conn_params)); |
| mpa_v2_params.ird = htons((u16)ep->ird); |
| mpa_v2_params.ord = htons((u16)ep->ord); |
| |
| if (peer2peer) { |
| mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL); |
| if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) |
| mpa_v2_params.ord |= |
| htons(MPA_V2_RDMA_WRITE_RTR); |
| else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) |
| mpa_v2_params.ord |= |
| htons(MPA_V2_RDMA_READ_RTR); |
| } |
| memcpy(mpa->private_data, &mpa_v2_params, |
| sizeof(struct mpa_v2_conn_params)); |
| |
| if (ep->plen) |
| memcpy(mpa->private_data + |
| sizeof(struct mpa_v2_conn_params), |
| ep->mpa_pkt + sizeof(*mpa), ep->plen); |
| } else |
| if (ep->plen) |
| memcpy(mpa->private_data, |
| ep->mpa_pkt + sizeof(*mpa), ep->plen); |
| |
| /* |
| * Reference the mpa skb. This ensures the data area |
| * will remain in memory until the hw acks the tx. |
| * Function fw4_ack() will deref it. |
| */ |
| skb_get(skb); |
| t4_set_arp_err_handler(skb, NULL, arp_failure_discard); |
| BUG_ON(ep->mpa_skb); |
| ep->mpa_skb = skb; |
| c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); |
| start_ep_timer(ep); |
| state_set(&ep->com, MPA_REQ_SENT); |
| ep->mpa_attr.initiator = 1; |
| return; |
| } |
| |
| static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen) |
| { |
| int mpalen, wrlen; |
| struct fw_ofld_tx_data_wr *req; |
| struct mpa_message *mpa; |
| struct sk_buff *skb; |
| struct mpa_v2_conn_params mpa_v2_params; |
| |
| PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen); |
| |
| mpalen = sizeof(*mpa) + plen; |
| if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) |
| mpalen += sizeof(struct mpa_v2_conn_params); |
| wrlen = roundup(mpalen + sizeof *req, 16); |
| |
| skb = get_skb(NULL, wrlen, GFP_KERNEL); |
| if (!skb) { |
| printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); |
| return -ENOMEM; |
| } |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); |
| |
| req = (struct fw_ofld_tx_data_wr *)skb_put(skb, wrlen); |
| memset(req, 0, wrlen); |
| req->op_to_immdlen = cpu_to_be32( |
| FW_WR_OP(FW_OFLD_TX_DATA_WR) | |
| FW_WR_COMPL(1) | |
| FW_WR_IMMDLEN(mpalen)); |
| req->flowid_len16 = cpu_to_be32( |
| FW_WR_FLOWID(ep->hwtid) | |
| FW_WR_LEN16(wrlen >> 4)); |
| req->plen = cpu_to_be32(mpalen); |
| req->tunnel_to_proxy = cpu_to_be32( |
| FW_OFLD_TX_DATA_WR_FLUSH(1) | |
| FW_OFLD_TX_DATA_WR_SHOVE(1)); |
| |
| 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 = mpa_rev; |
| 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(sizeof(struct mpa_v2_conn_params)); |
| mpa_v2_params.ird = htons(((u16)ep->ird) | |
| (peer2peer ? MPA_V2_PEER2PEER_MODEL : |
| 0)); |
| mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ? |
| (p2p_type == |
| FW_RI_INIT_P2PTYPE_RDMA_WRITE ? |
| MPA_V2_RDMA_WRITE_RTR : p2p_type == |
| FW_RI_INIT_P2PTYPE_READ_REQ ? |
| MPA_V2_RDMA_READ_RTR : 0) : 0)); |
| memcpy(mpa->private_data, &mpa_v2_params, |
| sizeof(struct mpa_v2_conn_params)); |
| |
| if (ep->plen) |
| memcpy(mpa->private_data + |
| sizeof(struct mpa_v2_conn_params), pdata, plen); |
| } else |
| if (plen) |
| memcpy(mpa->private_data, pdata, plen); |
| |
| /* |
| * Reference the mpa skb again. This ensures the data area |
| * will remain in memory until the hw acks the tx. |
| * Function fw4_ack() will deref it. |
| */ |
| skb_get(skb); |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); |
| t4_set_arp_err_handler(skb, NULL, arp_failure_discard); |
| BUG_ON(ep->mpa_skb); |
| ep->mpa_skb = skb; |
| return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); |
| } |
| |
| static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen) |
| { |
| int mpalen, wrlen; |
| struct fw_ofld_tx_data_wr *req; |
| struct mpa_message *mpa; |
| struct sk_buff *skb; |
| struct mpa_v2_conn_params mpa_v2_params; |
| |
| PDBG("%s ep %p tid %u pd_len %d\n", __func__, ep, ep->hwtid, ep->plen); |
| |
| mpalen = sizeof(*mpa) + plen; |
| if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) |
| mpalen += sizeof(struct mpa_v2_conn_params); |
| wrlen = roundup(mpalen + sizeof *req, 16); |
| |
| skb = get_skb(NULL, wrlen, GFP_KERNEL); |
| if (!skb) { |
| printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); |
| return -ENOMEM; |
| } |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); |
| |
| req = (struct fw_ofld_tx_data_wr *) skb_put(skb, wrlen); |
| memset(req, 0, wrlen); |
| req->op_to_immdlen = cpu_to_be32( |
| FW_WR_OP(FW_OFLD_TX_DATA_WR) | |
| FW_WR_COMPL(1) | |
| FW_WR_IMMDLEN(mpalen)); |
| req->flowid_len16 = cpu_to_be32( |
| FW_WR_FLOWID(ep->hwtid) | |
| FW_WR_LEN16(wrlen >> 4)); |
| req->plen = cpu_to_be32(mpalen); |
| req->tunnel_to_proxy = cpu_to_be32( |
| FW_OFLD_TX_DATA_WR_FLUSH(1) | |
| FW_OFLD_TX_DATA_WR_SHOVE(1)); |
| |
| mpa = (struct mpa_message *)(req + 1); |
| memset(mpa, 0, sizeof(*mpa)); |
| memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); |
| mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) | |
| (markers_enabled ? MPA_MARKERS : 0); |
| mpa->revision = ep->mpa_attr.version; |
| mpa->private_data_size = htons(plen); |
| |
| if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { |
| mpa->flags |= MPA_ENHANCED_RDMA_CONN; |
| mpa->private_data_size += |
| htons(sizeof(struct mpa_v2_conn_params)); |
| mpa_v2_params.ird = htons((u16)ep->ird); |
| mpa_v2_params.ord = htons((u16)ep->ord); |
| if (peer2peer && (ep->mpa_attr.p2p_type != |
| FW_RI_INIT_P2PTYPE_DISABLED)) { |
| mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL); |
| |
| if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) |
| mpa_v2_params.ord |= |
| htons(MPA_V2_RDMA_WRITE_RTR); |
| else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) |
| mpa_v2_params.ord |= |
| htons(MPA_V2_RDMA_READ_RTR); |
| } |
| |
| memcpy(mpa->private_data, &mpa_v2_params, |
| sizeof(struct mpa_v2_conn_params)); |
| |
| if (ep->plen) |
| memcpy(mpa->private_data + |
| sizeof(struct mpa_v2_conn_params), pdata, plen); |
| } else |
| if (plen) |
| memcpy(mpa->private_data, pdata, plen); |
| |
| /* |
| * Reference the mpa skb. This ensures the data area |
| * will remain in memory until the hw acks the tx. |
| * Function fw4_ack() will deref it. |
| */ |
| skb_get(skb); |
| t4_set_arp_err_handler(skb, NULL, arp_failure_discard); |
| ep->mpa_skb = skb; |
| state_set(&ep->com, MPA_REP_SENT); |
| 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 = GET_TID_TID(ntohl(req->tos_atid)); |
| struct tid_info *t = dev->rdev.lldi.tids; |
| |
| ep = lookup_atid(t, atid); |
| |
| PDBG("%s ep %p tid %u snd_isn %u rcv_isn %u\n", __func__, ep, tid, |
| be32_to_cpu(req->snd_isn), be32_to_cpu(req->rcv_isn)); |
| |
| dst_confirm(ep->dst); |
| |
| /* setup the hwtid for this connection */ |
| ep->hwtid = tid; |
| cxgb4_insert_tid(t, ep, tid); |
| |
| 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 */ |
| cxgb4_free_atid(t, atid); |
| |
| /* start MPA negotiation */ |
| send_flowc(ep, NULL); |
| if (ep->retry_with_mpa_v1) |
| send_mpa_req(ep, skb, 1); |
| else |
| send_mpa_req(ep, skb, mpa_rev); |
| |
| return 0; |
| } |
| |
| static void close_complete_upcall(struct c4iw_ep *ep) |
| { |
| struct iw_cm_event event; |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_CLOSE; |
| if (ep->com.cm_id) { |
| PDBG("close complete delivered ep %p cm_id %p tid %u\n", |
| ep, ep->com.cm_id, ep->hwtid); |
| ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
| ep->com.cm_id->rem_ref(ep->com.cm_id); |
| ep->com.cm_id = NULL; |
| ep->com.qp = NULL; |
| } |
| } |
| |
| static int abort_connection(struct c4iw_ep *ep, struct sk_buff *skb, gfp_t gfp) |
| { |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| close_complete_upcall(ep); |
| state_set(&ep->com, ABORTING); |
| return send_abort(ep, skb, gfp); |
| } |
| |
| static void peer_close_upcall(struct c4iw_ep *ep) |
| { |
| struct iw_cm_event event; |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_DISCONNECT; |
| if (ep->com.cm_id) { |
| PDBG("peer close delivered ep %p cm_id %p tid %u\n", |
| ep, ep->com.cm_id, ep->hwtid); |
| ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
| } |
| } |
| |
| static void peer_abort_upcall(struct c4iw_ep *ep) |
| { |
| struct iw_cm_event event; |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_CLOSE; |
| event.status = -ECONNRESET; |
| if (ep->com.cm_id) { |
| PDBG("abort delivered ep %p cm_id %p tid %u\n", ep, |
| ep->com.cm_id, ep->hwtid); |
| ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
| ep->com.cm_id->rem_ref(ep->com.cm_id); |
| ep->com.cm_id = NULL; |
| ep->com.qp = NULL; |
| } |
| } |
| |
| static void connect_reply_upcall(struct c4iw_ep *ep, int status) |
| { |
| struct iw_cm_event event; |
| |
| PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, status); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_CONNECT_REPLY; |
| event.status = status; |
| event.local_addr = ep->com.local_addr; |
| event.remote_addr = ep->com.remote_addr; |
| |
| if ((status == 0) || (status == -ECONNREFUSED)) { |
| if (!ep->tried_with_mpa_v1) { |
| /* this means MPA_v2 is used */ |
| event.private_data_len = ep->plen - |
| sizeof(struct mpa_v2_conn_params); |
| event.private_data = ep->mpa_pkt + |
| sizeof(struct mpa_message) + |
| sizeof(struct mpa_v2_conn_params); |
| } else { |
| /* this means MPA_v1 is used */ |
| event.private_data_len = ep->plen; |
| event.private_data = ep->mpa_pkt + |
| sizeof(struct mpa_message); |
| } |
| } |
| |
| PDBG("%s ep %p tid %u status %d\n", __func__, ep, |
| ep->hwtid, status); |
| 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 c4iw_ep *ep) |
| { |
| struct iw_cm_event event; |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_CONNECT_REQUEST; |
| event.local_addr = ep->com.local_addr; |
| event.remote_addr = 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 = c4iw_max_read_depth; |
| event.ird = c4iw_max_read_depth; |
| event.private_data_len = ep->plen; |
| event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); |
| } |
| if (state_read(&ep->parent_ep->com) != DEAD) { |
| c4iw_get_ep(&ep->com); |
| ep->parent_ep->com.cm_id->event_handler( |
| ep->parent_ep->com.cm_id, |
| &event); |
| } |
| c4iw_put_ep(&ep->parent_ep->com); |
| ep->parent_ep = NULL; |
| } |
| |
| static void established_upcall(struct c4iw_ep *ep) |
| { |
| struct iw_cm_event event; |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| memset(&event, 0, sizeof(event)); |
| event.event = IW_CM_EVENT_ESTABLISHED; |
| event.ird = ep->ird; |
| event.ord = ep->ord; |
| if (ep->com.cm_id) { |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
| } |
| } |
| |
| static int update_rx_credits(struct c4iw_ep *ep, u32 credits) |
| { |
| struct cpl_rx_data_ack *req; |
| struct sk_buff *skb; |
| int wrlen = roundup(sizeof *req, 16); |
| |
| PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits); |
| skb = get_skb(NULL, wrlen, GFP_KERNEL); |
| if (!skb) { |
| printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n"); |
| return 0; |
| } |
| |
| req = (struct cpl_rx_data_ack *) skb_put(skb, wrlen); |
| memset(req, 0, wrlen); |
| INIT_TP_WR(req, ep->hwtid); |
| OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_RX_DATA_ACK, |
| ep->hwtid)); |
| req->credit_dack = cpu_to_be32(credits | RX_FORCE_ACK(1) | |
| F_RX_DACK_CHANGE | |
| V_RX_DACK_MODE(dack_mode)); |
| set_wr_txq(skb, CPL_PRIORITY_ACK, ep->ctrlq_idx); |
| c4iw_ofld_send(&ep->com.dev->rdev, skb); |
| return credits; |
| } |
| |
| static void 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; |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| |
| /* |
| * 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) { |
| printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d," |
| " Received = %d\n", __func__, mpa_rev, mpa->revision); |
| err = -EPROTO; |
| goto err; |
| } |
| if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { |
| err = -EPROTO; |
| goto err; |
| } |
| |
| plen = ntohs(mpa->private_data_size); |
| |
| /* |
| * Fail if there's too much private data. |
| */ |
| if (plen > MPA_MAX_PRIVATE_DATA) { |
| err = -EPROTO; |
| goto err; |
| } |
| |
| /* |
| * If plen does not account for pkt size |
| */ |
| if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { |
| err = -EPROTO; |
| goto err; |
| } |
| |
| ep->plen = (u8) plen; |
| |
| /* |
| * If we don't have all the pdata yet, then bail. |
| * We'll continue process when more data arrives. |
| */ |
| if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) |
| return; |
| |
| if (mpa->flags & MPA_REJECT) { |
| err = -ECONNREFUSED; |
| goto err; |
| } |
| |
| /* |
| * If we get here we have accumulated the entire mpa |
| * start reply message including private data. And |
| * the MPA header is valid. |
| */ |
| state_set(&ep->com, FPDU_MODE); |
| ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; |
| ep->mpa_attr.recv_marker_enabled = markers_enabled; |
| ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; |
| ep->mpa_attr.version = mpa->revision; |
| ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; |
| |
| if (mpa->revision == 2) { |
| ep->mpa_attr.enhanced_rdma_conn = |
| mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0; |
| if (ep->mpa_attr.enhanced_rdma_conn) { |
| mpa_v2_params = (struct mpa_v2_conn_params *) |
| (ep->mpa_pkt + sizeof(*mpa)); |
| resp_ird = ntohs(mpa_v2_params->ird) & |
| MPA_V2_IRD_ORD_MASK; |
| resp_ord = ntohs(mpa_v2_params->ord) & |
| MPA_V2_IRD_ORD_MASK; |
| |
| /* |
| * 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) || (ep->ord > resp_ird)) { |
| err = -ENOMEM; |
| ep->ird = resp_ord; |
| ep->ord = resp_ird; |
| insuff_ird = 1; |
| } |
| |
| if (ntohs(mpa_v2_params->ird) & |
| MPA_V2_PEER2PEER_MODEL) { |
| if (ntohs(mpa_v2_params->ord) & |
| MPA_V2_RDMA_WRITE_RTR) |
| ep->mpa_attr.p2p_type = |
| FW_RI_INIT_P2PTYPE_RDMA_WRITE; |
| else if (ntohs(mpa_v2_params->ord) & |
| MPA_V2_RDMA_READ_RTR) |
| ep->mpa_attr.p2p_type = |
| FW_RI_INIT_P2PTYPE_READ_REQ; |
| } |
| } |
| } else if (mpa->revision == 1) |
| if (peer2peer) |
| ep->mpa_attr.p2p_type = p2p_type; |
| |
| PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " |
| "xmit_marker_enabled=%d, version=%d p2p_type=%d local-p2p_type = " |
| "%d\n", __func__, ep->mpa_attr.crc_enabled, |
| ep->mpa_attr.recv_marker_enabled, |
| ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version, |
| ep->mpa_attr.p2p_type, p2p_type); |
| |
| /* |
| * If responder's RTR does not match with that of initiator, assign |
| * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not |
| * generated when moving QP to RTS state. |
| * A TERM message will be sent after QP has moved to RTS state |
| */ |
| if ((ep->mpa_attr.version == 2) && peer2peer && |
| (ep->mpa_attr.p2p_type != p2p_type)) { |
| ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; |
| rtr_mismatch = 1; |
| } |
| |
| attrs.mpa_attr = ep->mpa_attr; |
| attrs.max_ird = ep->ird; |
| attrs.max_ord = ep->ord; |
| attrs.llp_stream_handle = ep; |
| attrs.next_state = C4IW_QP_STATE_RTS; |
| |
| mask = C4IW_QP_ATTR_NEXT_STATE | |
| C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR | |
| C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD; |
| |
| /* bind QP and TID with INIT_WR */ |
| err = c4iw_modify_qp(ep->com.qp->rhp, |
| ep->com.qp, mask, &attrs, 1); |
| if (err) |
| goto err; |
| |
| /* |
| * If responder's RTR requirement did not match with what initiator |
| * supports, generate TERM message |
| */ |
| if (rtr_mismatch) { |
| printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__); |
| attrs.layer_etype = LAYER_MPA | DDP_LLP; |
| attrs.ecode = MPA_NOMATCH_RTR; |
| attrs.next_state = C4IW_QP_STATE_TERMINATE; |
| err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, |
| C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| /* |
| * Generate TERM if initiator IRD is not sufficient for responder |
| * provided ORD. Currently, we do the same behaviour even when |
| * responder provided IRD is also not sufficient as regards to |
| * initiator ORD. |
| */ |
| if (insuff_ird) { |
| printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n", |
| __func__); |
| attrs.layer_etype = LAYER_MPA | DDP_LLP; |
| attrs.ecode = MPA_INSUFF_IRD; |
| attrs.next_state = C4IW_QP_STATE_TERMINATE; |
| err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, |
| C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); |
| err = -ENOMEM; |
| goto out; |
| } |
| goto out; |
| err: |
| state_set(&ep->com, ABORTING); |
| send_abort(ep, skb, GFP_KERNEL); |
| out: |
| connect_reply_upcall(ep, err); |
| return; |
| } |
| |
| static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb) |
| { |
| struct mpa_message *mpa; |
| struct mpa_v2_conn_params *mpa_v2_params; |
| u16 plen; |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| |
| if (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)) { |
| stop_ep_timer(ep); |
| abort_connection(ep, skb, GFP_KERNEL); |
| return; |
| } |
| |
| PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
| |
| /* |
| * Copy the new data into our accumulation buffer. |
| */ |
| skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), |
| skb->len); |
| ep->mpa_pkt_len += skb->len; |
| |
| /* |
| * If we don't even have the mpa message, then bail. |
| * We'll continue process when more data arrives. |
| */ |
| if (ep->mpa_pkt_len < sizeof(*mpa)) |
| return; |
| |
| PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
| stop_ep_timer(ep); |
| mpa = (struct mpa_message *) ep->mpa_pkt; |
| |
| /* |
| * Validate MPA Header. |
| */ |
| if (mpa->revision > mpa_rev) { |
| printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d," |
| " Received = %d\n", __func__, mpa_rev, mpa->revision); |
| 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.initiator = 0; |
| ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; |
| ep->mpa_attr.recv_marker_enabled = markers_enabled; |
| ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; |
| ep->mpa_attr.version = mpa->revision; |
| if (mpa->revision == 1) |
| ep->tried_with_mpa_v1 = 1; |
| ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; |
| |
| if (mpa->revision == 2) { |
| ep->mpa_attr.enhanced_rdma_conn = |
| mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0; |
| if (ep->mpa_attr.enhanced_rdma_conn) { |
| mpa_v2_params = (struct mpa_v2_conn_params *) |
| (ep->mpa_pkt + sizeof(*mpa)); |
| ep->ird = ntohs(mpa_v2_params->ird) & |
| MPA_V2_IRD_ORD_MASK; |
| ep->ord = ntohs(mpa_v2_params->ord) & |
| MPA_V2_IRD_ORD_MASK; |
| if (ntohs(mpa_v2_params->ird) & MPA_V2_PEER2PEER_MODEL) |
| if (peer2peer) { |
| if (ntohs(mpa_v2_params->ord) & |
| MPA_V2_RDMA_WRITE_RTR) |
| ep->mpa_attr.p2p_type = |
| FW_RI_INIT_P2PTYPE_RDMA_WRITE; |
| else if (ntohs(mpa_v2_params->ord) & |
| MPA_V2_RDMA_READ_RTR) |
| ep->mpa_attr.p2p_type = |
| FW_RI_INIT_P2PTYPE_READ_REQ; |
| } |
| } |
| } else if (mpa->revision == 1) |
| if (peer2peer) |
| ep->mpa_attr.p2p_type = p2p_type; |
| |
| PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " |
| "xmit_marker_enabled=%d, version=%d p2p_type=%d\n", __func__, |
| ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, |
| ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version, |
| ep->mpa_attr.p2p_type); |
| |
| state_set(&ep->com, MPA_REQ_RCVD); |
| |
| /* drive upcall */ |
| connect_request_upcall(ep); |
| return; |
| } |
| |
| static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct c4iw_ep *ep; |
| struct cpl_rx_data *hdr = cplhdr(skb); |
| unsigned int dlen = ntohs(hdr->len); |
| unsigned int tid = GET_TID(hdr); |
| struct tid_info *t = dev->rdev.lldi.tids; |
| |
| ep = lookup_tid(t, tid); |
| PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen); |
| skb_pull(skb, sizeof(*hdr)); |
| skb_trim(skb, dlen); |
| |
| ep->rcv_seq += dlen; |
| BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen)); |
| |
| /* update RX credits */ |
| update_rx_credits(ep, 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 %u\n", |
| __func__, ep, state_read(&ep->com), ep->hwtid); |
| |
| /* |
| * The ep will timeout and inform the ULP of the failure. |
| * See ep_timeout(). |
| */ |
| break; |
| } |
| return 0; |
| } |
| |
| static int abort_rpl(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct c4iw_ep *ep; |
| struct cpl_abort_rpl_rss *rpl = cplhdr(skb); |
| int release = 0; |
| unsigned int tid = GET_TID(rpl); |
| struct tid_info *t = dev->rdev.lldi.tids; |
| |
| ep = lookup_tid(t, tid); |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| BUG_ON(!ep); |
| mutex_lock(&ep->com.mutex); |
| switch (ep->com.state) { |
| case ABORTING: |
| __state_set(&ep->com, DEAD); |
| release = 1; |
| break; |
| default: |
| printk(KERN_ERR "%s ep %p state %d\n", |
| __func__, ep, ep->com.state); |
| break; |
| } |
| mutex_unlock(&ep->com.mutex); |
| |
| if (release) |
| release_ep_resources(ep); |
| return 0; |
| } |
| |
| /* |
| * 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 c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct c4iw_ep *ep; |
| struct cpl_act_open_rpl *rpl = cplhdr(skb); |
| unsigned int atid = GET_TID_TID(GET_AOPEN_ATID( |
| ntohl(rpl->atid_status))); |
| struct tid_info *t = dev->rdev.lldi.tids; |
| int status = GET_AOPEN_STATUS(ntohl(rpl->atid_status)); |
| |
| ep = lookup_atid(t, atid); |
| |
| PDBG("%s ep %p atid %u status %u errno %d\n", __func__, ep, atid, |
| status, status2errno(status)); |
| |
| if (status == CPL_ERR_RTX_NEG_ADVICE) { |
| printk(KERN_WARNING MOD "Connection problems for atid %u\n", |
| atid); |
| return 0; |
| } |
| |
| connect_reply_upcall(ep, status2errno(status)); |
| state_set(&ep->com, DEAD); |
| |
| if (status && act_open_has_tid(status)) |
| cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, GET_TID(rpl)); |
| |
| cxgb4_free_atid(t, atid); |
| dst_release(ep->dst); |
| cxgb4_l2t_release(ep->l2t); |
| c4iw_put_ep(&ep->com); |
| |
| return 0; |
| } |
| |
| static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct cpl_pass_open_rpl *rpl = cplhdr(skb); |
| struct tid_info *t = dev->rdev.lldi.tids; |
| unsigned int stid = GET_TID(rpl); |
| struct c4iw_listen_ep *ep = lookup_stid(t, stid); |
| |
| if (!ep) { |
| printk(KERN_ERR MOD "stid %d lookup failure!\n", stid); |
| return 0; |
| } |
| PDBG("%s ep %p status %d error %d\n", __func__, ep, |
| rpl->status, status2errno(rpl->status)); |
| c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status)); |
| |
| return 0; |
| } |
| |
| static int listen_stop(struct c4iw_listen_ep *ep) |
| { |
| struct sk_buff *skb; |
| struct cpl_close_listsvr_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_listsvr_req *) skb_put(skb, sizeof(*req)); |
| INIT_TP_WR(req, 0); |
| OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, |
| ep->stid)); |
| req->reply_ctrl = cpu_to_be16( |
| QUEUENO(ep->com.dev->rdev.lldi.rxq_ids[0])); |
| set_wr_txq(skb, CPL_PRIORITY_SETUP, 0); |
| return c4iw_ofld_send(&ep->com.dev->rdev, skb); |
| } |
| |
| static int close_listsrv_rpl(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct cpl_close_listsvr_rpl *rpl = cplhdr(skb); |
| struct tid_info *t = dev->rdev.lldi.tids; |
| unsigned int stid = GET_TID(rpl); |
| struct c4iw_listen_ep *ep = lookup_stid(t, stid); |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status)); |
| return 0; |
| } |
| |
| static void accept_cr(struct c4iw_ep *ep, __be32 peer_ip, struct sk_buff *skb, |
| struct cpl_pass_accept_req *req) |
| { |
| struct cpl_pass_accept_rpl *rpl; |
| unsigned int mtu_idx; |
| u64 opt0; |
| u32 opt2; |
| int wscale; |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| BUG_ON(skb_cloned(skb)); |
| skb_trim(skb, sizeof(*rpl)); |
| skb_get(skb); |
| cxgb4_best_mtu(ep->com.dev->rdev.lldi.mtus, ep->mtu, &mtu_idx); |
| wscale = compute_wscale(rcv_win); |
| opt0 = KEEP_ALIVE(1) | |
| DELACK(1) | |
| WND_SCALE(wscale) | |
| MSS_IDX(mtu_idx) | |
| L2T_IDX(ep->l2t->idx) | |
| TX_CHAN(ep->tx_chan) | |
| SMAC_SEL(ep->smac_idx) | |
| DSCP(ep->tos) | |
| ULP_MODE(ULP_MODE_TCPDDP) | |
| RCV_BUFSIZ(rcv_win>>10); |
| opt2 = RX_CHANNEL(0) | |
| RSS_QUEUE_VALID | RSS_QUEUE(ep->rss_qid); |
| |
| if (enable_tcp_timestamps && req->tcpopt.tstamp) |
| opt2 |= TSTAMPS_EN(1); |
| if (enable_tcp_sack && req->tcpopt.sack) |
| opt2 |= SACK_EN(1); |
| if (wscale && enable_tcp_window_scaling) |
| opt2 |= WND_SCALE_EN(1); |
| |
| rpl = cplhdr(skb); |
| INIT_TP_WR(rpl, ep->hwtid); |
| OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, |
| ep->hwtid)); |
| rpl->opt0 = cpu_to_be64(opt0); |
| rpl->opt2 = cpu_to_be32(opt2); |
| set_wr_txq(skb, CPL_PRIORITY_SETUP, ep->ctrlq_idx); |
| c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); |
| |
| return; |
| } |
| |
| static void reject_cr(struct c4iw_dev *dev, u32 hwtid, __be32 peer_ip, |
| struct sk_buff *skb) |
| { |
| PDBG("%s c4iw_dev %p tid %u peer_ip %x\n", __func__, dev, hwtid, |
| peer_ip); |
| BUG_ON(skb_cloned(skb)); |
| skb_trim(skb, sizeof(struct cpl_tid_release)); |
| skb_get(skb); |
| release_tid(&dev->rdev, hwtid, skb); |
| return; |
| } |
| |
| static void get_4tuple(struct cpl_pass_accept_req *req, |
| __be32 *local_ip, __be32 *peer_ip, |
| __be16 *local_port, __be16 *peer_port) |
| { |
| int eth_len = G_ETH_HDR_LEN(be32_to_cpu(req->hdr_len)); |
| int ip_len = G_IP_HDR_LEN(be32_to_cpu(req->hdr_len)); |
| struct iphdr *ip = (struct iphdr *)((u8 *)(req + 1) + eth_len); |
| struct tcphdr *tcp = (struct tcphdr *) |
| ((u8 *)(req + 1) + eth_len + ip_len); |
| |
| PDBG("%s saddr 0x%x daddr 0x%x sport %u dport %u\n", __func__, |
| ntohl(ip->saddr), ntohl(ip->daddr), ntohs(tcp->source), |
| ntohs(tcp->dest)); |
| |
| *peer_ip = ip->saddr; |
| *local_ip = ip->daddr; |
| *peer_port = tcp->source; |
| *local_port = tcp->dest; |
| |
| return; |
| } |
| |
| static int import_ep(struct c4iw_ep *ep, __be32 peer_ip, struct dst_entry *dst, |
| struct c4iw_dev *cdev, bool clear_mpa_v1) |
| { |
| struct neighbour *n; |
| int err, step; |
| |
| n = dst_neigh_lookup(dst, &peer_ip); |
| if (!n) |
| return -ENODEV; |
| |
| rcu_read_lock(); |
| err = -ENOMEM; |
| if (n->dev->flags & IFF_LOOPBACK) { |
| struct net_device *pdev; |
| |
| pdev = ip_dev_find(&init_net, peer_ip); |
| ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t, |
| n, pdev, 0); |
| if (!ep->l2t) |
| goto out; |
| ep->mtu = pdev->mtu; |
| ep->tx_chan = cxgb4_port_chan(pdev); |
| ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1; |
| step = cdev->rdev.lldi.ntxq / |
| cdev->rdev.lldi.nchan; |
| ep->txq_idx = cxgb4_port_idx(pdev) * step; |
| step = cdev->rdev.lldi.nrxq / |
| cdev->rdev.lldi.nchan; |
| ep->ctrlq_idx = cxgb4_port_idx(pdev); |
| ep->rss_qid = cdev->rdev.lldi.rxq_ids[ |
| cxgb4_port_idx(pdev) * step]; |
| dev_put(pdev); |
| } else { |
| ep->l2t = cxgb4_l2t_get(cdev->rdev.lldi.l2t, |
| n, n->dev, 0); |
| if (!ep->l2t) |
| goto out; |
| ep->mtu = dst_mtu(ep->dst); |
| ep->tx_chan = cxgb4_port_chan(n->dev); |
| ep->smac_idx = (cxgb4_port_viid(n->dev) & 0x7F) << 1; |
| step = cdev->rdev.lldi.ntxq / |
| cdev->rdev.lldi.nchan; |
| ep->txq_idx = cxgb4_port_idx(n->dev) * step; |
| ep->ctrlq_idx = cxgb4_port_idx(n->dev); |
| step = cdev->rdev.lldi.nrxq / |
| cdev->rdev.lldi.nchan; |
| ep->rss_qid = cdev->rdev.lldi.rxq_ids[ |
| cxgb4_port_idx(n->dev) * step]; |
| |
| 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 pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct c4iw_ep *child_ep, *parent_ep; |
| struct cpl_pass_accept_req *req = cplhdr(skb); |
| unsigned int stid = GET_POPEN_TID(ntohl(req->tos_stid)); |
| struct tid_info *t = dev->rdev.lldi.tids; |
| unsigned int hwtid = GET_TID(req); |
| struct dst_entry *dst; |
| struct rtable *rt; |
| __be32 local_ip, peer_ip; |
| __be16 local_port, peer_port; |
| int err; |
| |
| parent_ep = lookup_stid(t, stid); |
| PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid); |
| |
| get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port); |
| |
| if (state_read(&parent_ep->com) != LISTEN) { |
| printk(KERN_ERR "%s - listening ep not in LISTEN\n", |
| __func__); |
| goto reject; |
| } |
| |
| /* Find output route */ |
| rt = find_route(dev, local_ip, peer_ip, local_port, peer_port, |
| GET_POPEN_TOS(ntohl(req->tos_stid))); |
| if (!rt) { |
| printk(KERN_ERR MOD "%s - failed to find dst entry!\n", |
| __func__); |
| goto reject; |
| } |
| dst = &rt->dst; |
| |
| child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL); |
| if (!child_ep) { |
| printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n", |
| __func__); |
| dst_release(dst); |
| goto reject; |
| } |
| |
| err = import_ep(child_ep, peer_ip, dst, dev, false); |
| if (err) { |
| printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n", |
| __func__); |
| dst_release(dst); |
| kfree(child_ep); |
| goto reject; |
| } |
| |
| state_set(&child_ep->com, CONNECTING); |
| child_ep->com.dev = dev; |
| child_ep->com.cm_id = NULL; |
| child_ep->com.local_addr.sin_family = PF_INET; |
| child_ep->com.local_addr.sin_port = local_port; |
| child_ep->com.local_addr.sin_addr.s_addr = local_ip; |
| child_ep->com.remote_addr.sin_family = PF_INET; |
| child_ep->com.remote_addr.sin_port = peer_port; |
| child_ep->com.remote_addr.sin_addr.s_addr = peer_ip; |
| c4iw_get_ep(&parent_ep->com); |
| child_ep->parent_ep = parent_ep; |
| child_ep->tos = GET_POPEN_TOS(ntohl(req->tos_stid)); |
| child_ep->dst = dst; |
| child_ep->hwtid = hwtid; |
| |
| PDBG("%s tx_chan %u smac_idx %u rss_qid %u\n", __func__, |
| child_ep->tx_chan, child_ep->smac_idx, child_ep->rss_qid); |
| |
| init_timer(&child_ep->timer); |
| cxgb4_insert_tid(t, child_ep, hwtid); |
| accept_cr(child_ep, peer_ip, skb, req); |
| goto out; |
| reject: |
| reject_cr(dev, hwtid, peer_ip, skb); |
| out: |
| return 0; |
| } |
| |
| static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct c4iw_ep *ep; |
| struct cpl_pass_establish *req = cplhdr(skb); |
| struct tid_info *t = dev->rdev.lldi.tids; |
| unsigned int tid = GET_TID(req); |
| |
| ep = lookup_tid(t, tid); |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| ep->snd_seq = be32_to_cpu(req->snd_isn); |
| ep->rcv_seq = be32_to_cpu(req->rcv_isn); |
| |
| set_emss(ep, ntohs(req->tcp_opt)); |
| |
| dst_confirm(ep->dst); |
| state_set(&ep->com, MPA_REQ_WAIT); |
| start_ep_timer(ep); |
| send_flowc(ep, skb); |
| |
| return 0; |
| } |
| |
| static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct cpl_peer_close *hdr = cplhdr(skb); |
| struct c4iw_ep *ep; |
| struct c4iw_qp_attributes attrs; |
| int disconnect = 1; |
| int release = 0; |
| struct tid_info *t = dev->rdev.lldi.tids; |
| unsigned int tid = GET_TID(hdr); |
| int ret; |
| |
| ep = lookup_tid(t, tid); |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| dst_confirm(ep->dst); |
| |
| mutex_lock(&ep->com.mutex); |
| switch (ep->com.state) { |
| case MPA_REQ_WAIT: |
| __state_set(&ep->com, CLOSING); |
| break; |
| case MPA_REQ_SENT: |
| __state_set(&ep->com, CLOSING); |
| connect_reply_upcall(ep, -ECONNRESET); |
| break; |
| case MPA_REQ_RCVD: |
| |
| /* |
| * We're gonna mark this puppy DEAD, but keep |
| * the reference on it until the ULP accepts or |
| * rejects the CR. Also wake up anyone waiting |
| * in rdma connection migration (see c4iw_accept_cr()). |
| */ |
| __state_set(&ep->com, CLOSING); |
| PDBG("waking up ep %p tid %u\n", ep, ep->hwtid); |
| c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); |
| break; |
| case MPA_REP_SENT: |
| __state_set(&ep->com, CLOSING); |
| PDBG("waking up ep %p tid %u\n", ep, ep->hwtid); |
| c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); |
| break; |
| case FPDU_MODE: |
| start_ep_timer(ep); |
| __state_set(&ep->com, CLOSING); |
| attrs.next_state = C4IW_QP_STATE_CLOSING; |
| ret = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, |
| C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); |
| if (ret != -ECONNRESET) { |
| peer_close_upcall(ep); |
| disconnect = 1; |
| } |
| break; |
| case ABORTING: |
| disconnect = 0; |
| break; |
| case CLOSING: |
| __state_set(&ep->com, MORIBUND); |
| disconnect = 0; |
| break; |
| case MORIBUND: |
| 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); |
| __state_set(&ep->com, DEAD); |
| release = 1; |
| disconnect = 0; |
| break; |
| case DEAD: |
| disconnect = 0; |
| break; |
| default: |
| BUG_ON(1); |
| } |
| mutex_unlock(&ep->com.mutex); |
| if (disconnect) |
| c4iw_ep_disconnect(ep, 0, GFP_KERNEL); |
| if (release) |
| release_ep_resources(ep); |
| return 0; |
| } |
| |
| /* |
| * 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 c4iw_reconnect(struct c4iw_ep *ep) |
| { |
| struct rtable *rt; |
| int err = 0; |
| |
| PDBG("%s qp %p cm_id %p\n", __func__, ep->com.qp, ep->com.cm_id); |
| init_timer(&ep->timer); |
| |
| /* |
| * Allocate an active TID to initiate a TCP connection. |
| */ |
| ep->atid = cxgb4_alloc_atid(ep->com.dev->rdev.lldi.tids, ep); |
| if (ep->atid == -1) { |
| printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); |
| err = -ENOMEM; |
| goto fail2; |
| } |
| |
| /* find a route */ |
| rt = find_route(ep->com.dev, |
| ep->com.cm_id->local_addr.sin_addr.s_addr, |
| ep->com.cm_id->remote_addr.sin_addr.s_addr, |
| ep->com.cm_id->local_addr.sin_port, |
| ep->com.cm_id->remote_addr.sin_port, 0); |
| if (!rt) { |
| printk(KERN_ERR MOD "%s - cannot find route.\n", __func__); |
| err = -EHOSTUNREACH; |
| goto fail3; |
| } |
| ep->dst = &rt->dst; |
| |
| err = import_ep(ep, ep->com.cm_id->remote_addr.sin_addr.s_addr, |
| ep->dst, ep->com.dev, false); |
| if (err) { |
| printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__); |
| goto fail4; |
| } |
| |
| PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n", |
| __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid, |
| ep->l2t->idx); |
| |
| state_set(&ep->com, CONNECTING); |
| ep->tos = 0; |
| |
| /* send connect request to rnic */ |
| err = send_connect(ep); |
| if (!err) |
| goto out; |
| |
| cxgb4_l2t_release(ep->l2t); |
| fail4: |
| dst_release(ep->dst); |
| fail3: |
| cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid); |
| fail2: |
| /* |
| * remember to send notification to upper layer. |
| * We are in here so the upper layer is not aware that this is |
| * re-connect attempt and so, upper layer is still waiting for |
| * response of 1st connect request. |
| */ |
| connect_reply_upcall(ep, -ECONNRESET); |
| c4iw_put_ep(&ep->com); |
| out: |
| return err; |
| } |
| |
| static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct cpl_abort_req_rss *req = cplhdr(skb); |
| struct c4iw_ep *ep; |
| struct cpl_abort_rpl *rpl; |
| struct sk_buff *rpl_skb; |
| struct c4iw_qp_attributes attrs; |
| int ret; |
| int release = 0; |
| struct tid_info *t = dev->rdev.lldi.tids; |
| unsigned int tid = GET_TID(req); |
| |
| ep = lookup_tid(t, tid); |
| if (is_neg_adv_abort(req->status)) { |
| PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep, |
| ep->hwtid); |
| return 0; |
| } |
| PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid, |
| ep->com.state); |
| |
| /* |
| * Wake up any threads in rdma_init() or rdma_fini(). |
| * However, this is not needed if com state is just |
| * MPA_REQ_SENT |
| */ |
| if (ep->com.state != MPA_REQ_SENT) |
| c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); |
| |
| mutex_lock(&ep->com.mutex); |
| switch (ep->com.state) { |
| case CONNECTING: |
| break; |
| case MPA_REQ_WAIT: |
| stop_ep_timer(ep); |
| break; |
| case MPA_REQ_SENT: |
| stop_ep_timer(ep); |
| if (mpa_rev == 2 && ep->tried_with_mpa_v1) |
| connect_reply_upcall(ep, -ECONNRESET); |
| else { |
| /* |
| * we just don't send notification upwards because we |
| * want to retry with mpa_v1 without upper layers even |
| * knowing it. |
| * |
| * do some housekeeping so as to re-initiate the |
| * connection |
| */ |
| PDBG("%s: mpa_rev=%d. Retrying with mpav1\n", __func__, |
| mpa_rev); |
| ep->retry_with_mpa_v1 = 1; |
| } |
| break; |
| case MPA_REP_SENT: |
| break; |
| case MPA_REQ_RCVD: |
| break; |
| case MORIBUND: |
| case CLOSING: |
| stop_ep_timer(ep); |
| /*FALLTHROUGH*/ |
| case FPDU_MODE: |
| if (ep->com.cm_id && ep->com.qp) { |
| attrs.next_state = C4IW_QP_STATE_ERROR; |
| ret = c4iw_modify_qp(ep->com.qp->rhp, |
| ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, |
| &attrs, 1); |
| if (ret) |
| printk(KERN_ERR MOD |
| "%s - qp <- error failed!\n", |
| __func__); |
| } |
| peer_abort_upcall(ep); |
| break; |
| case ABORTING: |
| break; |
| case DEAD: |
| PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__); |
| mutex_unlock(&ep->com.mutex); |
| return 0; |
| default: |
| BUG_ON(1); |
| break; |
| } |
| dst_confirm(ep->dst); |
| if (ep->com.state != ABORTING) { |
| __state_set(&ep->com, DEAD); |
| /* we don't release if we want to retry with mpa_v1 */ |
| if (!ep->retry_with_mpa_v1) |
| release = 1; |
| } |
| mutex_unlock(&ep->com.mutex); |
| |
| rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL); |
| if (!rpl_skb) { |
| printk(KERN_ERR MOD "%s - cannot allocate skb!\n", |
| __func__); |
| release = 1; |
| goto out; |
| } |
| set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); |
| rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl)); |
| INIT_TP_WR(rpl, ep->hwtid); |
| OPCODE_TID(rpl) = cpu_to_be32(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid)); |
| rpl->cmd = CPL_ABORT_NO_RST; |
| c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb); |
| out: |
| if (release) |
| release_ep_resources(ep); |
| |
| /* retry with mpa-v1 */ |
| if (ep && ep->retry_with_mpa_v1) { |
| cxgb4_remove_tid(ep->com.dev->rdev.lldi.tids, 0, ep->hwtid); |
| dst_release(ep->dst); |
| cxgb4_l2t_release(ep->l2t); |
| c4iw_reconnect(ep); |
| } |
| |
| return 0; |
| } |
| |
| static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct c4iw_ep *ep; |
| struct c4iw_qp_attributes attrs; |
| struct cpl_close_con_rpl *rpl = cplhdr(skb); |
| int release = 0; |
| struct tid_info *t = dev->rdev.lldi.tids; |
| unsigned int tid = GET_TID(rpl); |
| |
| ep = lookup_tid(t, tid); |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| BUG_ON(!ep); |
| |
| /* The cm_id may be null if we failed to connect */ |
| mutex_lock(&ep->com.mutex); |
| switch (ep->com.state) { |
| case CLOSING: |
| __state_set(&ep->com, MORIBUND); |
| break; |
| case MORIBUND: |
| 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); |
| __state_set(&ep->com, DEAD); |
| release = 1; |
| break; |
| case ABORTING: |
| case DEAD: |
| break; |
| default: |
| BUG_ON(1); |
| break; |
| } |
| mutex_unlock(&ep->com.mutex); |
| if (release) |
| release_ep_resources(ep); |
| return 0; |
| } |
| |
| static int terminate(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct cpl_rdma_terminate *rpl = cplhdr(skb); |
| struct tid_info *t = dev->rdev.lldi.tids; |
| unsigned int tid = GET_TID(rpl); |
| struct c4iw_ep *ep; |
| struct c4iw_qp_attributes attrs; |
| |
| ep = lookup_tid(t, tid); |
| BUG_ON(!ep); |
| |
| if (ep && ep->com.qp) { |
| printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid, |
| ep->com.qp->wq.sq.qid); |
| attrs.next_state = C4IW_QP_STATE_TERMINATE; |
| c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, |
| C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); |
| } else |
| printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid); |
| |
| return 0; |
| } |
| |
| /* |
| * Upcall from the adapter indicating data has been transmitted. |
| * For us its just the single MPA request or reply. We can now free |
| * the skb holding the mpa message. |
| */ |
| static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct c4iw_ep *ep; |
| struct cpl_fw4_ack *hdr = cplhdr(skb); |
| u8 credits = hdr->credits; |
| unsigned int tid = GET_TID(hdr); |
| struct tid_info *t = dev->rdev.lldi.tids; |
| |
| |
| ep = lookup_tid(t, tid); |
| PDBG("%s ep %p tid %u credits %u\n", __func__, ep, ep->hwtid, credits); |
| if (credits == 0) { |
| PDBG("%s 0 credit ack ep %p tid %u state %u\n", |
| __func__, ep, ep->hwtid, state_read(&ep->com)); |
| return 0; |
| } |
| |
| dst_confirm(ep->dst); |
| if (ep->mpa_skb) { |
| PDBG("%s last streaming msg ack ep %p tid %u state %u " |
| "initiator %u freeing skb\n", __func__, ep, ep->hwtid, |
| state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0); |
| kfree_skb(ep->mpa_skb); |
| ep->mpa_skb = NULL; |
| } |
| return 0; |
| } |
| |
| int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) |
| { |
| int err; |
| struct c4iw_ep *ep = to_ep(cm_id); |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| |
| if (state_read(&ep->com) == DEAD) { |
| c4iw_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 = c4iw_ep_disconnect(ep, 0, GFP_KERNEL); |
| } |
| c4iw_put_ep(&ep->com); |
| return 0; |
| } |
| |
| int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
| { |
| int err; |
| struct c4iw_qp_attributes attrs; |
| enum c4iw_qp_attr_mask mask; |
| struct c4iw_ep *ep = to_ep(cm_id); |
| struct c4iw_dev *h = to_c4iw_dev(cm_id->device); |
| struct c4iw_qp *qp = get_qhp(h, conn_param->qpn); |
| |
| PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
| if (state_read(&ep->com) == DEAD) { |
| err = -ECONNRESET; |
| goto err; |
| } |
| |
| BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); |
| BUG_ON(!qp); |
| |
| if ((conn_param->ord > c4iw_max_read_depth) || |
| (conn_param->ird > c4iw_max_read_depth)) { |
| abort_connection(ep, NULL, GFP_KERNEL); |
| err = -EINVAL; |
| goto err; |
| } |
| |
| if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { |
| if (conn_param->ord > ep->ird) { |
| ep->ird = conn_param->ird; |
| ep->ord = conn_param->ord; |
| send_mpa_reject(ep, conn_param->private_data, |
| conn_param->private_data_len); |
| abort_connection(ep, NULL, GFP_KERNEL); |
| err = -ENOMEM; |
| goto err; |
| } |
| if (conn_param->ird > ep->ord) { |
| if (!ep->ord) |
| conn_param->ird = 1; |
| else { |
| abort_connection(ep, NULL, GFP_KERNEL); |
| err = -ENOMEM; |
| goto err; |
| } |
| } |
| |
| } |
| ep->ird = conn_param->ird; |
| ep->ord = conn_param->ord; |
| |
| if (ep->mpa_attr.version != 2) |
| if (peer2peer && ep->ird == 0) |
| ep->ird = 1; |
| |
| PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord); |
| |
| cm_id->add_ref(cm_id); |
| ep->com.cm_id = cm_id; |
| ep->com.qp = qp; |
| |
| /* bind QP to EP and move to RTS */ |
| attrs.mpa_attr = ep->mpa_attr; |
| attrs.max_ird = ep->ird; |
| attrs.max_ord = ep->ord; |
| attrs.llp_stream_handle = ep; |
| attrs.next_state = C4IW_QP_STATE_RTS; |
| |
| /* bind QP and TID with INIT_WR */ |
| mask = C4IW_QP_ATTR_NEXT_STATE | |
| C4IW_QP_ATTR_LLP_STREAM_HANDLE | |
| C4IW_QP_ATTR_MPA_ATTR | |
| C4IW_QP_ATTR_MAX_IRD | |
| C4IW_QP_ATTR_MAX_ORD; |
| |
| err = c4iw_modify_qp(ep->com.qp->rhp, |
| ep->com.qp, mask, &attrs, 1); |
| if (err) |
| goto err1; |
| err = send_mpa_reply(ep, conn_param->private_data, |
| conn_param->private_data_len); |
| if (err) |
| goto err1; |
| |
| state_set(&ep->com, FPDU_MODE); |
| established_upcall(ep); |
| c4iw_put_ep(&ep->com); |
| return 0; |
| err1: |
| ep->com.cm_id = NULL; |
| ep->com.qp = NULL; |
| cm_id->rem_ref(cm_id); |
| err: |
| c4iw_put_ep(&ep->com); |
| return err; |
| } |
| |
| 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; |
| struct rtable *rt; |
| int err = 0; |
| |
| if ((conn_param->ord > c4iw_max_read_depth) || |
| (conn_param->ird > c4iw_max_read_depth)) { |
| err = -EINVAL; |
| goto out; |
| } |
| ep = alloc_ep(sizeof(*ep), GFP_KERNEL); |
| if (!ep) { |
| printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); |
| err = -ENOMEM; |
| goto out; |
| } |
| init_timer(&ep->timer); |
| ep->plen = conn_param->private_data_len; |
| if (ep->plen) |
| memcpy(ep->mpa_pkt + sizeof(struct mpa_message), |
| conn_param->private_data, ep->plen); |
| ep->ird = conn_param->ird; |
| ep->ord = conn_param->ord; |
| |
| if (peer2peer && ep->ord == 0) |
| ep->ord = 1; |
| |
| cm_id->add_ref(cm_id); |
| ep->com.dev = dev; |
| ep->com.cm_id = cm_id; |
| ep->com.qp = get_qhp(dev, conn_param->qpn); |
| 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 = cxgb4_alloc_atid(dev->rdev.lldi.tids, ep); |
| if (ep->atid == -1) { |
| printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); |
| err = -ENOMEM; |
| goto fail2; |
| } |
| |
| PDBG("%s saddr 0x%x sport 0x%x raddr 0x%x rport 0x%x\n", __func__, |
| ntohl(cm_id->local_addr.sin_addr.s_addr), |
| ntohs(cm_id->local_addr.sin_port), |
| ntohl(cm_id->remote_addr.sin_addr.s_addr), |
| ntohs(cm_id->remote_addr.sin_port)); |
| |
| /* find a route */ |
| rt = find_route(dev, |
| 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, 0); |
| if (!rt) { |
| printk(KERN_ERR MOD "%s - cannot find route.\n", __func__); |
| err = -EHOSTUNREACH; |
| goto fail3; |
| } |
| ep->dst = &rt->dst; |
| |
| err = import_ep(ep, cm_id->remote_addr.sin_addr.s_addr, |
| ep->dst, ep->com.dev, true); |
| if (err) { |
| printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__); |
| goto fail4; |
| } |
| |
| PDBG("%s txq_idx %u tx_chan %u smac_idx %u rss_qid %u l2t_idx %u\n", |
| __func__, ep->txq_idx, ep->tx_chan, ep->smac_idx, ep->rss_qid, |
| ep->l2t->idx); |
| |
| state_set(&ep->com, CONNECTING); |
| ep->tos = 0; |
| 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; |
| |
| cxgb4_l2t_release(ep->l2t); |
| fail4: |
| dst_release(ep->dst); |
| fail3: |
| cxgb4_free_atid(ep->com.dev->rdev.lldi.tids, ep->atid); |
| fail2: |
| cm_id->rem_ref(cm_id); |
| c4iw_put_ep(&ep->com); |
| out: |
| 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) { |
| printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); |
| err = -ENOMEM; |
| goto fail1; |
| } |
| PDBG("%s ep %p\n", __func__, ep); |
| cm_id->add_ref(cm_id); |
| ep->com.cm_id = cm_id; |
| ep->com.dev = dev; |
| ep->backlog = backlog; |
| ep->com.local_addr = cm_id->local_addr; |
| |
| /* |
| * Allocate a server TID. |
| */ |
| ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep); |
| if (ep->stid == -1) { |
| printk(KERN_ERR MOD "%s - cannot alloc stid.\n", __func__); |
| err = -ENOMEM; |
| goto fail2; |
| } |
| |
| state_set(&ep->com, LISTEN); |
| c4iw_init_wr_wait(&ep->com.wr_wait); |
| err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], ep->stid, |
| ep->com.local_addr.sin_addr.s_addr, |
| ep->com.local_addr.sin_port, |
| ep->com.dev->rdev.lldi.rxq_ids[0]); |
| if (err) |
| goto fail3; |
| |
| /* wait for pass_open_rpl */ |
| err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0, |
| __func__); |
| if (!err) { |
| cm_id->provider_data = ep; |
| goto out; |
| } |
| fail3: |
| cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET); |
| fail2: |
| cm_id->rem_ref(cm_id); |
| c4iw_put_ep(&ep->com); |
| fail1: |
| out: |
| return err; |
| } |
| |
| int c4iw_destroy_listen(struct iw_cm_id *cm_id) |
| { |
| int err; |
| struct c4iw_listen_ep *ep = to_listen_ep(cm_id); |
| |
| PDBG("%s ep %p\n", __func__, ep); |
| |
| might_sleep(); |
| state_set(&ep->com, DEAD); |
| c4iw_init_wr_wait(&ep->com.wr_wait); |
| err = listen_stop(ep); |
| if (err) |
| goto done; |
| err = c4iw_wait_for_reply(&ep->com.dev->rdev, &ep->com.wr_wait, 0, 0, |
| __func__); |
| cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET); |
| done: |
| cm_id->rem_ref(cm_id); |
| c4iw_put_ep(&ep->com); |
| return err; |
| } |
| |
| int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp) |
| { |
| int ret = 0; |
| int close = 0; |
| int fatal = 0; |
| struct c4iw_rdev *rdev; |
| |
| mutex_lock(&ep->com.mutex); |
| |
| PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep, |
| states[ep->com.state], abrupt); |
| |
| rdev = &ep->com.dev->rdev; |
| if (c4iw_fatal_error(rdev)) { |
| fatal = 1; |
| close_complete_upcall(ep); |
| ep->com.state = DEAD; |
| } |
| switch (ep->com.state) { |
| case MPA_REQ_WAIT: |
| case MPA_REQ_SENT: |
| case MPA_REQ_RCVD: |
| case MPA_REP_SENT: |
| case FPDU_MODE: |
| close = 1; |
| if (abrupt) |
| ep->com.state = ABORTING; |
| else { |
| ep->com.state = CLOSING; |
| start_ep_timer(ep); |
| } |
| set_bit(CLOSE_SENT, &ep->com.flags); |
| break; |
| case CLOSING: |
| if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) { |
| close = 1; |
| if (abrupt) { |
| stop_ep_timer(ep); |
| ep->com.state = ABORTING; |
| } else |
| ep->com.state = MORIBUND; |
| } |
| break; |
| case MORIBUND: |
| case ABORTING: |
| case DEAD: |
| PDBG("%s ignoring disconnect ep %p state %u\n", |
| __func__, ep, ep->com.state); |
| break; |
| default: |
| BUG(); |
| break; |
| } |
| |
| if (close) { |
| if (abrupt) { |
| close_complete_upcall(ep); |
| ret = send_abort(ep, NULL, gfp); |
| } else |
| ret = send_halfclose(ep, gfp); |
| if (ret) |
| fatal = 1; |
| } |
| mutex_unlock(&ep->com.mutex); |
| if (fatal) |
| release_ep_resources(ep); |
| return ret; |
| } |
| |
| static int async_event(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct cpl_fw6_msg *rpl = cplhdr(skb); |
| c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]); |
| return 0; |
| } |
| |
| /* |
| * These are the real handlers that are called from a |
| * work queue. |
| */ |
| static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = { |
| [CPL_ACT_ESTABLISH] = act_establish, |
| [CPL_ACT_OPEN_RPL] = act_open_rpl, |
| [CPL_RX_DATA] = rx_data, |
| [CPL_ABORT_RPL_RSS] = abort_rpl, |
| [CPL_ABORT_RPL] = abort_rpl, |
| [CPL_PASS_OPEN_RPL] = pass_open_rpl, |
| [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl, |
| [CPL_PASS_ACCEPT_REQ] = pass_accept_req, |
| [CPL_PASS_ESTABLISH] = pass_establish, |
| [CPL_PEER_CLOSE] = peer_close, |
| [CPL_ABORT_REQ_RSS] = peer_abort, |
| [CPL_CLOSE_CON_RPL] = close_con_rpl, |
| [CPL_RDMA_TERMINATE] = terminate, |
| [CPL_FW4_ACK] = fw4_ack, |
| [CPL_FW6_MSG] = async_event |
| }; |
| |
| static void process_timeout(struct c4iw_ep *ep) |
| { |
| struct c4iw_qp_attributes attrs; |
| int abort = 1; |
| |
| mutex_lock(&ep->com.mutex); |
| PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid, |
| ep->com.state); |
| switch (ep->com.state) { |
| case MPA_REQ_SENT: |
| __state_set(&ep->com, ABORTING); |
| connect_reply_upcall(ep, -ETIMEDOUT); |
| break; |
| case MPA_REQ_WAIT: |
| __state_set(&ep->com, ABORTING); |
| break; |
| case CLOSING: |
| case MORIBUND: |
| if (ep->com.cm_id && ep->com.qp) { |
| attrs.next_state = C4IW_QP_STATE_ERROR; |
| c4iw_modify_qp(ep->com.qp->rhp, |
| ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, |
| &attrs, 1); |
| } |
| __state_set(&ep->com, ABORTING); |
| break; |
| default: |
| printk(KERN_ERR "%s unexpected state ep %p tid %u state %u\n", |
| __func__, ep, ep->hwtid, ep->com.state); |
| WARN_ON(1); |
| abort = 0; |
| } |
| mutex_unlock(&ep->com.mutex); |
| if (abort) |
| abort_connection(ep, NULL, 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); |
| 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; |
| |
| 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; |
| |
| spin_lock(&timeout_lock); |
| list_add_tail(&ep->entry, &timeout_list); |
| spin_unlock(&timeout_lock); |
| queue_work(workq, &skb_work); |
| } |
| |
| /* |
| * All the CM events are handled on a work queue to have a safe context. |
| */ |
| static int sched(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| |
| /* |
| * Save dev in the skb->cb area. |
| */ |
| *((struct c4iw_dev **) (skb->cb + sizeof(void *))) = dev; |
| |
| /* |
| * Queue the skb and schedule the worker thread. |
| */ |
| skb_queue_tail(&rxq, skb); |
| queue_work(workq, &skb_work); |
| return 0; |
| } |
| |
| static int set_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct cpl_set_tcb_rpl *rpl = cplhdr(skb); |
| |
| if (rpl->status != CPL_ERR_NONE) { |
| printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u " |
| "for tid %u\n", rpl->status, GET_TID(rpl)); |
| } |
| kfree_skb(skb); |
| return 0; |
| } |
| |
| static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct cpl_fw6_msg *rpl = cplhdr(skb); |
| struct c4iw_wr_wait *wr_waitp; |
| int ret; |
| |
| PDBG("%s type %u\n", __func__, rpl->type); |
| |
| switch (rpl->type) { |
| case 1: |
| ret = (int)((be64_to_cpu(rpl->data[0]) >> 8) & 0xff); |
| wr_waitp = (struct c4iw_wr_wait *)(__force unsigned long) rpl->data[1]; |
| PDBG("%s wr_waitp %p ret %u\n", __func__, wr_waitp, ret); |
| if (wr_waitp) |
| c4iw_wake_up(wr_waitp, ret ? -ret : 0); |
| kfree_skb(skb); |
| break; |
| case 2: |
| sched(dev, skb); |
| break; |
| default: |
| printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__, |
| rpl->type); |
| kfree_skb(skb); |
| break; |
| } |
| return 0; |
| } |
| |
| static int peer_abort_intr(struct c4iw_dev *dev, struct sk_buff *skb) |
| { |
| struct cpl_abort_req_rss *req = cplhdr(skb); |
| struct c4iw_ep *ep; |
| struct tid_info *t = dev->rdev.lldi.tids; |
| unsigned int tid = GET_TID(req); |
| |
| ep = lookup_tid(t, tid); |
| if (is_neg_adv_abort(req->status)) { |
| PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep, |
| ep->hwtid); |
| kfree_skb(skb); |
| return 0; |
| } |
| PDBG("%s ep %p tid %u state %u\n", __func__, ep, ep->hwtid, |
| ep->com.state); |
| |
| /* |
| * Wake up any threads in rdma_init() or rdma_fini(). |
| * However, 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); |
| 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 |
| }; |
| |
| int __init c4iw_cm_init(void) |
| { |
| spin_lock_init(&timeout_lock); |
| skb_queue_head_init(&rxq); |
| |
| workq = create_singlethread_workqueue("iw_cxgb4"); |
| if (!workq) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| void __exit c4iw_cm_term(void) |
| { |
| WARN_ON(!list_empty(&timeout_list)); |
| flush_workqueue(workq); |
| destroy_workqueue(workq); |
| } |