From patchwork Mon Dec 3 11:23:00 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vipul Pandya X-Patchwork-Id: 1832611 Return-Path: X-Original-To: patchwork-linux-rdma@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 65D6BDF2F9 for ; Mon, 3 Dec 2012 11:28:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754920Ab2LCL17 (ORCPT ); Mon, 3 Dec 2012 06:27:59 -0500 Received: from stargate.chelsio.com ([67.207.112.58]:26962 "EHLO stargate.chelsio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754751Ab2LCL14 (ORCPT ); Mon, 3 Dec 2012 06:27:56 -0500 Received: from maui.asicdesigners.com (maui.asicdesigners.com [10.192.180.15]) by stargate.chelsio.com (8.13.1/8.13.1) with SMTP id qB3BRrUh008195; Mon, 3 Dec 2012 03:27:53 -0800 Received: from strawberry ([10.193.185.96]) by maui.asicdesigners.com with Microsoft SMTPSVC(6.0.3790.4675); Mon, 3 Dec 2012 03:27:52 -0800 From: Vipul Pandya To: linux-rdma@vger.kernel.org, netdev@vger.kernel.org Cc: roland@purestorage.com, davem@davemloft.net, divy@chelsio.com, dm@chelsio.com, kumaras@chelsio.com, swise@opengridcomputing.com, abhishek@chelsio.com, Vipul Pandya Subject: [PATCH V3 4/5] RDMA/cxgb4: Fix LE hash collision bug for passive open connection Date: Mon, 3 Dec 2012 16:53:00 +0530 Message-Id: <1354533781-31575-5-git-send-email-vipul@chelsio.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1354533781-31575-1-git-send-email-vipul@chelsio.com> References: <1354533781-31575-1-git-send-email-vipul@chelsio.com> X-OriginalArrivalTime: 03 Dec 2012 11:27:53.0082 (UTC) FILETIME=[3BDDC5A0:01CDD149] Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org It establishes passive open connection through firmware work request. Passive open connection will go through this path as now instead of listening server we create a server filter which will redirect the incoming SYN packet to the offload queue. After this driver tries to establish the connection using firmware work request. Signed-off-by: Vipul Pandya --- V2: Changed commenting style from kernel-doc format('/**') to normal V3: Resending the whole patch series again with the missing patches in V2 drivers/infiniband/hw/cxgb4/cm.c | 411 ++++++++++++++++++++--- drivers/infiniband/hw/cxgb4/device.c | 85 +++++- drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 9 + drivers/net/ethernet/chelsio/cxgb4/t4_msg.h | 46 +++ 4 files changed, 496 insertions(+), 55 deletions(-) diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c index 4878704..2ac6a2c 100644 --- a/drivers/infiniband/hw/cxgb4/cm.c +++ b/drivers/infiniband/hw/cxgb4/cm.c @@ -38,10 +38,12 @@ #include #include #include +#include #include #include #include +#include #include "iw_cxgb4.h" @@ -1569,13 +1571,14 @@ static int pass_open_rpl(struct c4iw_dev *dev, struct sk_buff *skb) 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 stid %d lookup failure!\n", __func__, stid); + goto out; } PDBG("%s ep %p status %d error %d\n", __func__, ep, rpl->status, status2errno(rpl->status)); c4iw_wake_up(&ep->com.wr_wait, status2errno(rpl->status)); +out: return 0; } @@ -1779,15 +1782,23 @@ static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb) unsigned int hwtid = GET_TID(req); struct dst_entry *dst; struct rtable *rt; - __be32 local_ip, peer_ip; + __be32 local_ip, peer_ip = 0; __be16 local_port, peer_port; int err; + u16 peer_mss = ntohs(req->tcpopt.mss); parent_ep = lookup_stid(t, stid); - PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid); - + if (!parent_ep) { + PDBG("%s connect request on invalid stid %d\n", __func__, stid); + goto reject; + } get_4tuple(req, &local_ip, &peer_ip, &local_port, &peer_port); + PDBG("%s parent ep %p hwtid %u laddr 0x%x raddr 0x%x lport %d " \ + "rport %d peer_mss %d\n", __func__, parent_ep, hwtid, + ntohl(local_ip), ntohl(peer_ip), ntohs(local_port), + ntohs(peer_port), peer_mss); + if (state_read(&parent_ep->com) != LISTEN) { printk(KERN_ERR "%s - listening ep not in LISTEN\n", __func__); @@ -1821,6 +1832,9 @@ static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb) goto reject; } + if (peer_mss && child_ep->mtu > (peer_mss + 40)) + child_ep->mtu = peer_mss + 40; + state_set(&child_ep->com, CONNECTING); child_ep->com.dev = dev; child_ep->com.cm_id = NULL; @@ -1861,6 +1875,9 @@ static int pass_establish(struct c4iw_dev *dev, struct sk_buff *skb) ep->snd_seq = be32_to_cpu(req->snd_isn); ep->rcv_seq = be32_to_cpu(req->rcv_isn); + PDBG("%s ep %p hwtid %u tcp_opt 0x%02x\n", __func__, ep, tid, + ntohs(req->tcp_opt)); + set_emss(ep, ntohs(req->tcp_opt)); dst_confirm(ep->dst); @@ -2478,7 +2495,6 @@ int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog) struct c4iw_dev *dev = to_c4iw_dev(cm_id->device); struct c4iw_listen_ep *ep; - might_sleep(); ep = alloc_ep(sizeof(*ep), GFP_KERNEL); @@ -2497,30 +2513,49 @@ int c4iw_create_listen(struct iw_cm_id *cm_id, int backlog) /* * Allocate a server TID. */ - ep->stid = cxgb4_alloc_stid(dev->rdev.lldi.tids, PF_INET, ep); + if (dev->rdev.lldi.enable_fw_ofld_conn) + ep->stid = cxgb4_alloc_sftid(dev->rdev.lldi.tids, PF_INET, ep); + else + 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 (dev->rdev.lldi.enable_fw_ofld_conn) { + do { + err = cxgb4_create_server_filter( + 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 == -EBUSY) { + set_current_state(TASK_UNINTERRUPTIBLE); + schedule_timeout(usecs_to_jiffies(100)); + } + } while (err == -EBUSY); + } else { + c4iw_init_wr_wait(&ep->com.wr_wait); + err = cxgb4_create_server(ep->com.dev->rdev.lldi.ports[0], + ep->stid, ep->com.local_addr.sin_addr.s_addr, + ep->com.local_addr.sin_port, + ep->com.dev->rdev.lldi.rxq_ids[0]); + if (!err) + err = c4iw_wait_for_reply(&ep->com.dev->rdev, + &ep->com.wr_wait, + 0, 0, __func__); + } if (!err) { cm_id->provider_data = ep; goto out; } -fail3: + pr_err("%s cxgb4_create_server/filter failed err %d " \ + "stid %d laddr %08x lport %d\n", \ + __func__, err, ep->stid, + ntohl(ep->com.local_addr.sin_addr.s_addr), + ntohs(ep->com.local_addr.sin_port)); cxgb4_free_stid(ep->com.dev->rdev.lldi.tids, ep->stid, PF_INET); fail2: cm_id->rem_ref(cm_id); @@ -2539,12 +2574,18 @@ int c4iw_destroy_listen(struct iw_cm_id *cm_id) 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__); + if (ep->com.dev->rdev.lldi.enable_fw_ofld_conn) { + err = cxgb4_remove_server_filter( + ep->com.dev->rdev.lldi.ports[0], ep->stid, + ep->com.dev->rdev.lldi.rxq_ids[0], 0); + } else { + c4iw_init_wr_wait(&ep->com.wr_wait); + err = 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); @@ -2621,10 +2662,298 @@ int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp) return ret; } -static int async_event(struct c4iw_dev *dev, struct sk_buff *skb) +static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb, + struct cpl_fw6_msg_ofld_connection_wr_rpl *req) +{ + struct c4iw_ep *ep; + + ep = (struct c4iw_ep *)lookup_atid(dev->rdev.lldi.tids, req->tid); + if (!ep) + return; + + switch (req->retval) { + case FW_ENOMEM: + case FW_EADDRINUSE: + PDBG("%s ofld conn wr ret %d\n", __func__, req->retval); + break; + default: + pr_info("%s unexpected ofld conn wr retval %d\n", + __func__, req->retval); + break; + } + connect_reply_upcall(ep, status2errno(req->retval)); +} + +static void passive_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb, + struct cpl_fw6_msg_ofld_connection_wr_rpl *req) +{ + struct sk_buff *rpl_skb; + struct cpl_pass_accept_req *cpl; + int ret; + + rpl_skb = (struct sk_buff *)cpu_to_be64(req->cookie); + BUG_ON(!rpl_skb); + if (req->retval) { + PDBG("%s passive open failure %d\n", __func__, req->retval); + kfree_skb(rpl_skb); + } else { + cpl = (struct cpl_pass_accept_req *)cplhdr(rpl_skb); + OPCODE_TID(cpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, + htonl(req->tid))); + ret = pass_accept_req(dev, rpl_skb); + if (!ret) + kfree_skb(rpl_skb); + } + return; +} + +static int deferred_fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb) { struct cpl_fw6_msg *rpl = cplhdr(skb); - c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]); + struct cpl_fw6_msg_ofld_connection_wr_rpl *req; + + switch (rpl->type) { + case FW6_TYPE_CQE: + c4iw_ev_dispatch(dev, (struct t4_cqe *)&rpl->data[0]); + break; + case FW6_TYPE_OFLD_CONNECTION_WR_RPL: + req = (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data; + switch (req->t_state) { + case TCP_SYN_SENT: + active_ofld_conn_reply(dev, skb, req); + break; + case TCP_SYN_RECV: + passive_ofld_conn_reply(dev, skb, req); + break; + default: + pr_err("%s unexpected ofld conn wr state %d\n", + __func__, req->t_state); + break; + } + break; + } + return 0; +} + +static void build_cpl_pass_accept_req(struct sk_buff *skb, int stid , u8 tos) +{ + u32 l2info; + u16 vlantag, len, hdr_len; + u8 intf; + struct cpl_rx_pkt *cpl = cplhdr(skb); + struct cpl_pass_accept_req *req; + struct tcp_options_received tmp_opt; + + /* Store values from cpl_rx_pkt in temporary location. */ + vlantag = cpl->vlan; + len = cpl->len; + l2info = cpl->l2info; + hdr_len = cpl->hdr_len; + intf = cpl->iff; + + __skb_pull(skb, sizeof(*req) + sizeof(struct rss_header)); + + /* We need to parse the TCP options from SYN packet. + * to generate cpl_pass_accept_req. + */ + memset(&tmp_opt, 0, sizeof(tmp_opt)); + tcp_clear_options(&tmp_opt); + tcp_parse_options(skb, &tmp_opt, 0, 0, NULL); + + req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req)); + memset(req, 0, sizeof(*req)); + req->l2info = cpu_to_be16(V_SYN_INTF(intf) | + V_SYN_MAC_IDX(G_RX_MACIDX(htonl(l2info))) | + F_SYN_XACT_MATCH); + req->hdr_len = cpu_to_be32(V_SYN_RX_CHAN(G_RX_CHAN(htonl(l2info))) | + V_TCP_HDR_LEN(G_RX_TCPHDR_LEN(htons(hdr_len))) | + V_IP_HDR_LEN(G_RX_IPHDR_LEN(htons(hdr_len))) | + V_ETH_HDR_LEN(G_RX_ETHHDR_LEN(htonl(l2info)))); + req->vlan = vlantag; + req->len = len; + req->tos_stid = cpu_to_be32(PASS_OPEN_TID(stid) | + PASS_OPEN_TOS(tos)); + req->tcpopt.mss = htons(tmp_opt.mss_clamp); + if (tmp_opt.wscale_ok) + req->tcpopt.wsf = tmp_opt.snd_wscale; + req->tcpopt.tstamp = tmp_opt.saw_tstamp; + if (tmp_opt.sack_ok) + req->tcpopt.sack = 1; + OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_REQ, 0)); + return; +} + +static void send_fw_pass_open_req(struct c4iw_dev *dev, struct sk_buff *skb, + __be32 laddr, __be16 lport, + __be32 raddr, __be16 rport, + u32 rcv_isn, u32 filter, u16 window, + u32 rss_qid, u8 port_id) +{ + struct sk_buff *req_skb; + struct fw_ofld_connection_wr *req; + struct cpl_pass_accept_req *cpl = cplhdr(skb); + + req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL); + req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req)); + memset(req, 0, sizeof(*req)); + req->op_compl = htonl(V_WR_OP(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL(1)); + req->len16_pkd = htonl(FW_WR_LEN16(DIV_ROUND_UP(sizeof(*req), 16))); + req->le.version_cpl = htonl(F_FW_OFLD_CONNECTION_WR_CPL); + req->le.filter = filter; + req->le.lport = lport; + req->le.pport = rport; + req->le.u.ipv4.lip = laddr; + req->le.u.ipv4.pip = raddr; + req->tcb.rcv_nxt = htonl(rcv_isn + 1); + req->tcb.rcv_adv = htons(window); + req->tcb.t_state_to_astid = + htonl(V_FW_OFLD_CONNECTION_WR_T_STATE(TCP_SYN_RECV) | + V_FW_OFLD_CONNECTION_WR_RCV_SCALE(cpl->tcpopt.wsf) | + V_FW_OFLD_CONNECTION_WR_ASTID( + GET_PASS_OPEN_TID(ntohl(cpl->tos_stid)))); + + /* + * We store the qid in opt2 which will be used by the firmware + * to send us the wr response. + */ + req->tcb.opt2 = htonl(V_RSS_QUEUE(rss_qid)); + + /* + * We initialize the MSS index in TCB to 0xF. + * So that when driver sends cpl_pass_accept_rpl + * TCB picks up the correct value. If this was 0 + * TP will ignore any value > 0 for MSS index. + */ + req->tcb.opt0 = cpu_to_be64(V_MSS_IDX(0xF)); + req->cookie = cpu_to_be64((u64)skb); + + set_wr_txq(req_skb, CPL_PRIORITY_CONTROL, port_id); + cxgb4_ofld_send(dev->rdev.lldi.ports[0], req_skb); +} + +/* + * Handler for CPL_RX_PKT message. Need to handle cpl_rx_pkt + * messages when a filter is being used instead of server to + * redirect a syn packet. When packets hit filter they are redirected + * to the offload queue and driver tries to establish the connection + * using firmware work request. + */ +static int rx_pkt(struct c4iw_dev *dev, struct sk_buff *skb) +{ + int stid; + unsigned int filter; + struct ethhdr *eh = NULL; + struct vlan_ethhdr *vlan_eh = NULL; + struct iphdr *iph; + struct tcphdr *tcph; + struct rss_header *rss = (void *)skb->data; + struct cpl_rx_pkt *cpl = (void *)skb->data; + struct cpl_pass_accept_req *req = (void *)(rss + 1); + struct l2t_entry *e; + struct dst_entry *dst; + struct rtable *rt; + struct c4iw_ep *lep; + u16 window; + struct port_info *pi; + struct net_device *pdev; + u16 rss_qid; + int step; + u32 tx_chan; + struct neighbour *neigh; + + /* Drop all non-SYN packets */ + if (!(cpl->l2info & cpu_to_be32(F_RXF_SYN))) + goto reject; + + /* + * Drop all packets which did not hit the filter. + * Unlikely to happen. + */ + if (!(rss->filter_hit && rss->filter_tid)) + goto reject; + + /* + * Calculate the server tid from filter hit index from cpl_rx_pkt. + */ + stid = cpu_to_be32(rss->hash_val) - dev->rdev.lldi.tids->sftid_base + + dev->rdev.lldi.tids->nstids; + + lep = (struct c4iw_ep *)lookup_stid(dev->rdev.lldi.tids, stid); + if (!lep) { + PDBG("%s connect request on invalid stid %d\n", __func__, stid); + goto reject; + } + + if (G_RX_ETHHDR_LEN(ntohl(cpl->l2info)) == ETH_HLEN) { + eh = (struct ethhdr *)(req + 1); + iph = (struct iphdr *)(eh + 1); + } else { + vlan_eh = (struct vlan_ethhdr *)(req + 1); + iph = (struct iphdr *)(vlan_eh + 1); + skb->vlan_tci = ntohs(cpl->vlan); + } + + if (iph->version != 0x4) + goto reject; + + tcph = (struct tcphdr *)(iph + 1); + skb_set_network_header(skb, (void *)iph - (void *)rss); + skb_set_transport_header(skb, (void *)tcph - (void *)rss); + skb_get(skb); + + PDBG("%s lip 0x%x lport %u pip 0x%x pport %u tos %d\n", __func__, + ntohl(iph->daddr), ntohs(tcph->dest), ntohl(iph->saddr), + ntohs(tcph->source), iph->tos); + + rt = find_route(dev, iph->daddr, iph->saddr, tcph->dest, tcph->source, + iph->tos); + if (!rt) { + pr_err("%s - failed to find dst entry!\n", + __func__); + goto reject; + } + dst = &rt->dst; + neigh = dst_neigh_lookup_skb(dst, skb); + + if (neigh->dev->flags & IFF_LOOPBACK) { + pdev = ip_dev_find(&init_net, iph->daddr); + e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh, + pdev, 0); + pi = (struct port_info *)netdev_priv(pdev); + tx_chan = cxgb4_port_chan(pdev); + dev_put(pdev); + } else { + e = cxgb4_l2t_get(dev->rdev.lldi.l2t, neigh, + neigh->dev, 0); + pi = (struct port_info *)netdev_priv(neigh->dev); + tx_chan = cxgb4_port_chan(neigh->dev); + } + if (!e) { + pr_err("%s - failed to allocate l2t entry!\n", + __func__); + goto free_dst; + } + + step = dev->rdev.lldi.nrxq / dev->rdev.lldi.nchan; + rss_qid = dev->rdev.lldi.rxq_ids[pi->port_id * step]; + window = htons(tcph->window); + + /* Calcuate filter portion for LE region. */ + filter = cpu_to_be32(select_ntuple(dev, dst, e)); + + /* + * Synthesize the cpl_pass_accept_req. We have everything except the + * TID. Once firmware sends a reply with TID we update the TID field + * in cpl and pass it through the regular cpl_pass_accept_req path. + */ + build_cpl_pass_accept_req(skb, stid, iph->tos); + send_fw_pass_open_req(dev, skb, iph->daddr, tcph->dest, iph->saddr, + tcph->source, ntohl(tcph->seq), filter, window, + rss_qid, pi->port_id); + cxgb4_l2t_release(e); +free_dst: + dst_release(dst); +reject: return 0; } @@ -2647,7 +2976,8 @@ static c4iw_handler_func work_handlers[NUM_CPL_CMDS] = { [CPL_CLOSE_CON_RPL] = close_con_rpl, [CPL_RDMA_TERMINATE] = terminate, [CPL_FW4_ACK] = fw4_ack, - [CPL_FW6_MSG] = async_event + [CPL_FW6_MSG] = deferred_fw6_msg, + [CPL_RX_PKT] = rx_pkt }; static void process_timeout(struct c4iw_ep *ep) @@ -2774,9 +3104,6 @@ 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; - u8 opcode; - struct cpl_fw6_msg_ofld_connection_wr_rpl *req; - struct c4iw_ep *ep; PDBG("%s type %u\n", __func__, rpl->type); @@ -2790,23 +3117,8 @@ static int fw6_msg(struct c4iw_dev *dev, struct sk_buff *skb) kfree_skb(skb); break; case FW6_TYPE_CQE: - sched(dev, skb); - break; case FW6_TYPE_OFLD_CONNECTION_WR_RPL: - opcode = *(const u8 *)rpl->data; - if (opcode == FW_OFLD_CONNECTION_WR) { - req = - (struct cpl_fw6_msg_ofld_connection_wr_rpl *)rpl->data; - if (req->t_state == TCP_SYN_SENT - && (req->retval == FW_ENOMEM - || req->retval == FW_EADDRINUSE)) { - ep = (struct c4iw_ep *) - lookup_atid(dev->rdev.lldi.tids, - req->tid); - c4iw_l2t_send(&dev->rdev, skb, ep->l2t); - return 0; - } - } + sched(dev, skb); break; default: printk(KERN_ERR MOD "%s unexpected fw6 msg type %u\n", __func__, @@ -2868,7 +3180,8 @@ c4iw_handler_func c4iw_handlers[NUM_CPL_CMDS] = { [CPL_RDMA_TERMINATE] = sched, [CPL_FW4_ACK] = sched, [CPL_SET_TCB_RPL] = set_tcb_rpl, - [CPL_FW6_MSG] = fw6_msg + [CPL_FW6_MSG] = fw6_msg, + [CPL_RX_PKT] = sched }; int __init c4iw_cm_init(void) diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c index cb4ecd7..6b5b3d1 100644 --- a/drivers/infiniband/hw/cxgb4/device.c +++ b/drivers/infiniband/hw/cxgb4/device.c @@ -279,6 +279,7 @@ static int stats_show(struct seq_file *seq, void *v) seq_printf(seq, " DB State: %s Transitions %llu\n", db_state_str[dev->db_state], dev->rdev.stats.db_state_transitions); + seq_printf(seq, "TCAM_FULL: %10llu\n", dev->rdev.stats.tcam_full); return 0; } @@ -577,14 +578,76 @@ out: return ctx; } +static inline struct sk_buff *copy_gl_to_skb_pkt(const struct pkt_gl *gl, + const __be64 *rsp, + u32 pktshift) +{ + struct sk_buff *skb; + + /* + * Allocate space for cpl_pass_accept_req which will be synthesized by + * driver. Once the driver synthesizes the request the skb will go + * through the regular cpl_pass_accept_req processing. + * The math here assumes sizeof cpl_pass_accept_req >= sizeof + * cpl_rx_pkt. + */ + skb = alloc_skb(gl->tot_len + sizeof(struct cpl_pass_accept_req) + + sizeof(struct rss_header) - pktshift, GFP_ATOMIC); + if (unlikely(!skb)) + return NULL; + + __skb_put(skb, gl->tot_len + sizeof(struct cpl_pass_accept_req) + + sizeof(struct rss_header) - pktshift); + + /* + * This skb will contain: + * rss_header from the rspq descriptor (1 flit) + * cpl_rx_pkt struct from the rspq descriptor (2 flits) + * space for the difference between the size of an + * rx_pkt and pass_accept_req cpl (1 flit) + * the packet data from the gl + */ + skb_copy_to_linear_data(skb, rsp, sizeof(struct cpl_pass_accept_req) + + sizeof(struct rss_header)); + skb_copy_to_linear_data_offset(skb, sizeof(struct rss_header) + + sizeof(struct cpl_pass_accept_req), + gl->va + pktshift, + gl->tot_len - pktshift); + return skb; +} + +static inline int recv_rx_pkt(struct c4iw_dev *dev, const struct pkt_gl *gl, + const __be64 *rsp) +{ + unsigned int opcode = *(u8 *)rsp; + struct sk_buff *skb; + + if (opcode != CPL_RX_PKT) + goto out; + + skb = copy_gl_to_skb_pkt(gl , rsp, dev->rdev.lldi.sge_pktshift); + if (skb == NULL) + goto out; + + if (c4iw_handlers[opcode] == NULL) { + pr_info("%s no handler opcode 0x%x...\n", __func__, + opcode); + kfree_skb(skb); + goto out; + } + c4iw_handlers[opcode](dev, skb); + return 1; +out: + return 0; +} + static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp, const struct pkt_gl *gl) { struct uld_ctx *ctx = handle; struct c4iw_dev *dev = ctx->dev; struct sk_buff *skb; - const struct cpl_act_establish *rpl; - unsigned int opcode; + u8 opcode; if (gl == NULL) { /* omit RSS and rsp_ctrl at end of descriptor */ @@ -601,19 +664,29 @@ static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp, u32 qid = be32_to_cpu(rc->pldbuflen_qid); c4iw_ev_handler(dev, qid); return 0; + } else if (unlikely(*(u8 *)rsp != *(u8 *)gl->va)) { + if (recv_rx_pkt(dev, gl, rsp)) + return 0; + + pr_info("%s: unexpected FL contents at %p, " \ + "RSS %#llx, FL %#llx, len %u\n", + pci_name(ctx->lldi.pdev), gl->va, + (unsigned long long)be64_to_cpu(*rsp), + (unsigned long long)be64_to_cpu(*(u64 *)gl->va), + gl->tot_len); + + return 0; } else { skb = cxgb4_pktgl_to_skb(gl, 128, 128); if (unlikely(!skb)) goto nomem; } - rpl = cplhdr(skb); - opcode = rpl->ot.opcode; - + opcode = *(u8 *)rsp; if (c4iw_handlers[opcode]) c4iw_handlers[opcode](dev, skb); else - printk(KERN_INFO "%s no handler opcode 0x%x...\n", __func__, + pr_info("%s no handler opcode 0x%x...\n", __func__, opcode); return 0; diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c index f55386b..1a26e3f 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c @@ -3326,6 +3326,10 @@ int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid, adap = netdev2adap(dev); + /* Adjust stid to correct filter index */ + stid -= adap->tids.nstids; + stid += adap->tids.nftids; + /* Check to make sure the filter requested is writable ... */ f = &adap->tids.ftid_tab[stid]; @@ -3374,6 +3378,11 @@ int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid, struct adapter *adap; adap = netdev2adap(dev); + + /* Adjust stid to correct filter index */ + stid -= adap->tids.nstids; + stid += adap->tids.nftids; + f = &adap->tids.ftid_tab[stid]; /* Unlock the filter */ f->locked = 0; diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h b/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h index 5b51c01..1179616 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h +++ b/drivers/net/ethernet/chelsio/cxgb4/t4_msg.h @@ -199,6 +199,18 @@ struct work_request_hdr { #define WR_HDR struct work_request_hdr wr +/* option 0 fields */ +#define S_MSS_IDX 60 +#define M_MSS_IDX 0xF +#define V_MSS_IDX(x) ((__u64)(x) << S_MSS_IDX) +#define G_MSS_IDX(x) (((x) >> S_MSS_IDX) & M_MSS_IDX) + +/* option 2 fields */ +#define S_RSS_QUEUE 0 +#define M_RSS_QUEUE 0x3FF +#define V_RSS_QUEUE(x) ((x) << S_RSS_QUEUE) +#define G_RSS_QUEUE(x) (((x) >> S_RSS_QUEUE) & M_RSS_QUEUE) + struct cpl_pass_open_req { WR_HDR; union opcode_tid ot; @@ -300,6 +312,9 @@ struct cpl_pass_establish { union opcode_tid ot; __be32 rsvd; __be32 tos_stid; +#define PASS_OPEN_TID(x) ((x) << 0) +#define PASS_OPEN_TOS(x) ((x) << 24) +#define GET_PASS_OPEN_TID(x) (((x) >> 0) & 0xFFFFFF) #define GET_POPEN_TID(x) ((x) & 0xffffff) #define GET_POPEN_TOS(x) (((x) >> 24) & 0xff) __be16 mac_idx; @@ -545,6 +560,37 @@ struct cpl_rx_pkt { __be16 err_vec; }; +/* rx_pkt.l2info fields */ +#define S_RX_ETHHDR_LEN 0 +#define M_RX_ETHHDR_LEN 0x1F +#define V_RX_ETHHDR_LEN(x) ((x) << S_RX_ETHHDR_LEN) +#define G_RX_ETHHDR_LEN(x) (((x) >> S_RX_ETHHDR_LEN) & M_RX_ETHHDR_LEN) + +#define S_RX_MACIDX 8 +#define M_RX_MACIDX 0x1FF +#define V_RX_MACIDX(x) ((x) << S_RX_MACIDX) +#define G_RX_MACIDX(x) (((x) >> S_RX_MACIDX) & M_RX_MACIDX) + +#define S_RXF_SYN 21 +#define V_RXF_SYN(x) ((x) << S_RXF_SYN) +#define F_RXF_SYN V_RXF_SYN(1U) + +#define S_RX_CHAN 28 +#define M_RX_CHAN 0xF +#define V_RX_CHAN(x) ((x) << S_RX_CHAN) +#define G_RX_CHAN(x) (((x) >> S_RX_CHAN) & M_RX_CHAN) + +/* rx_pkt.hdr_len fields */ +#define S_RX_TCPHDR_LEN 0 +#define M_RX_TCPHDR_LEN 0x3F +#define V_RX_TCPHDR_LEN(x) ((x) << S_RX_TCPHDR_LEN) +#define G_RX_TCPHDR_LEN(x) (((x) >> S_RX_TCPHDR_LEN) & M_RX_TCPHDR_LEN) + +#define S_RX_IPHDR_LEN 6 +#define M_RX_IPHDR_LEN 0x3FF +#define V_RX_IPHDR_LEN(x) ((x) << S_RX_IPHDR_LEN) +#define G_RX_IPHDR_LEN(x) (((x) >> S_RX_IPHDR_LEN) & M_RX_IPHDR_LEN) + struct cpl_trace_pkt { u8 opcode; u8 intf;