From patchwork Thu Jun 16 13:45:41 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Moni Shoua X-Patchwork-Id: 9180923 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 4B28B6075D for ; Thu, 16 Jun 2016 13:47:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3A89927F07 for ; Thu, 16 Jun 2016 13:47:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2F73628360; Thu, 16 Jun 2016 13:47:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 615AA27F07 for ; Thu, 16 Jun 2016 13:47:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754618AbcFPNrj (ORCPT ); Thu, 16 Jun 2016 09:47:39 -0400 Received: from [193.47.165.129] ([193.47.165.129]:43969 "EHLO mellanox.co.il" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754614AbcFPNri (ORCPT ); Thu, 16 Jun 2016 09:47:38 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from monis@mellanox.com) with ESMTPS (AES256-SHA encrypted); 16 Jun 2016 16:46:11 +0300 Received: from r-vnc06.mtr.labs.mlnx (r-vnc06.mtr.labs.mlnx [10.208.0.117]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id u5GDk9eE004942; Thu, 16 Jun 2016 16:46:11 +0300 From: Moni Shoua To: dledford@redhat.com Cc: linux-rdma@vger.kernel.org, matanb@mellanox.com, talal@mellanox.com, leonro@mellanox.com, majd@mellanox.com, yonatanc@mellanox.com, Moni Shoua , Kamal Heib , Amir Vadai Subject: [PATCH v2 rdma-next 19/29] IB/rxe: Received packets handling Date: Thu, 16 Jun 2016 16:45:41 +0300 Message-Id: <1466084751-29901-20-git-send-email-monis@mellanox.com> X-Mailer: git-send-email 1.7.6.4 In-Reply-To: <1466084751-29901-1-git-send-email-monis@mellanox.com> References: <1466084751-29901-1-git-send-email-monis@mellanox.com> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Handle receiving new packets which are sent to either request or response processing. Signed-off-by: Kamal Heib Signed-off-by: Amir Vadai Signed-off-by: Moni Shoua Reviewed-by: Haggai Eran --- drivers/infiniband/hw/rxe/rxe_recv.c | 420 +++++++++++++++++++++++++++++++++++ 1 file changed, 420 insertions(+) create mode 100644 drivers/infiniband/hw/rxe/rxe_recv.c diff --git a/drivers/infiniband/hw/rxe/rxe_recv.c b/drivers/infiniband/hw/rxe/rxe_recv.c new file mode 100644 index 0000000..3d464c2 --- /dev/null +++ b/drivers/infiniband/hw/rxe/rxe_recv.c @@ -0,0 +1,420 @@ +/* + * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, 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 + +#include "rxe.h" +#include "rxe_loc.h" + +static int check_type_state(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, + struct rxe_qp *qp) +{ + if (unlikely(!qp->valid)) + goto err1; + + switch (qp_type(qp)) { + case IB_QPT_RC: + if (unlikely((pkt->opcode & IB_OPCODE_RC) != 0)) { + pr_warn_ratelimited("bad qp type\n"); + goto err1; + } + break; + case IB_QPT_UC: + if (unlikely(!(pkt->opcode & IB_OPCODE_UC))) { + pr_warn_ratelimited("bad qp type\n"); + goto err1; + } + break; + case IB_QPT_UD: + case IB_QPT_SMI: + case IB_QPT_GSI: + if (unlikely(!(pkt->opcode & IB_OPCODE_UD))) { + pr_warn_ratelimited("bad qp type\n"); + goto err1; + } + break; + default: + pr_warn_ratelimited("unsupported qp type\n"); + goto err1; + } + + if (pkt->mask & RXE_REQ_MASK) { + if (unlikely(qp->resp.state != QP_STATE_READY)) + goto err1; + } else if (unlikely(qp->req.state < QP_STATE_READY || + qp->req.state > QP_STATE_DRAINED)) { + goto err1; + } + + return 0; + +err1: + return -EINVAL; +} + +static void set_bad_pkey_cntr(struct rxe_port *port) +{ + spin_lock_bh(&port->port_lock); + port->attr.bad_pkey_cntr = min((u32)0xffff, + port->attr.bad_pkey_cntr + 1); + spin_unlock_bh(&port->port_lock); +} + +static void set_qkey_viol_cntr(struct rxe_port *port) +{ + spin_lock_bh(&port->port_lock); + port->attr.qkey_viol_cntr = min((u32)0xffff, + port->attr.qkey_viol_cntr + 1); + spin_unlock_bh(&port->port_lock); +} + +static int check_keys(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, + u32 qpn, struct rxe_qp *qp) +{ + int i; + int found_pkey = 0; + struct rxe_port *port = &rxe->port; + u16 pkey = bth_pkey(pkt); + + pkt->pkey_index = 0; + + if (qpn == 1) { + for (i = 0; i < port->attr.pkey_tbl_len; i++) { + if (pkey_match(pkey, port->pkey_tbl[i])) { + pkt->pkey_index = i; + found_pkey = 1; + break; + } + } + + if (!found_pkey) { + pr_warn_ratelimited("bad pkey = 0x%x\n", pkey); + set_bad_pkey_cntr(port); + goto err1; + } + } else if (qpn != 0) { + if (unlikely(!pkey_match(pkey, + port->pkey_tbl[qp->attr.pkey_index] + ))) { + pr_warn_ratelimited("bad pkey = 0x%0x\n", pkey); + set_bad_pkey_cntr(port); + goto err1; + } + pkt->pkey_index = qp->attr.pkey_index; + } + + if ((qp_type(qp) == IB_QPT_UD || qp_type(qp) == IB_QPT_GSI) && + qpn != 0 && pkt->mask) { + u32 qkey = (qpn == 1) ? GSI_QKEY : qp->attr.qkey; + + if (unlikely(deth_qkey(pkt) != qkey)) { + pr_warn_ratelimited("bad qkey, got 0x%x expected 0x%x for qpn 0x%x\n", + deth_qkey(pkt), qkey, qpn); + set_qkey_viol_cntr(port); + goto err1; + } + } + + return 0; + +err1: + return -EINVAL; +} + +static int check_addr(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, + struct rxe_qp *qp) +{ + struct sk_buff *skb = PKT_TO_SKB(pkt); + + if (qp_type(qp) != IB_QPT_RC && qp_type(qp) != IB_QPT_UC) + goto done; + + if (unlikely(pkt->port_num != qp->attr.port_num)) { + pr_warn_ratelimited("port %d != qp port %d\n", + pkt->port_num, qp->attr.port_num); + goto err1; + } + + if (skb->protocol == htons(ETH_P_IP)) { + struct in_addr *saddr = + &qp->pri_av.sgid_addr._sockaddr_in.sin_addr; + struct in_addr *daddr = + &qp->pri_av.dgid_addr._sockaddr_in.sin_addr; + + if (ip_hdr(skb)->daddr != saddr->s_addr) { + pr_warn_ratelimited("dst addr %pI4 != qp source addr %pI4\n", + &ip_hdr(skb)->daddr, + &saddr->s_addr); + goto err1; + } + + if (ip_hdr(skb)->saddr != daddr->s_addr) { + pr_warn_ratelimited("source addr %pI4 != qp dst addr %pI4\n", + &ip_hdr(skb)->saddr, + &daddr->s_addr); + goto err1; + } + + } else if (skb->protocol == htons(ETH_P_IPV6)) { + struct in6_addr *saddr = + &qp->pri_av.sgid_addr._sockaddr_in6.sin6_addr; + struct in6_addr *daddr = + &qp->pri_av.dgid_addr._sockaddr_in6.sin6_addr; + + if (memcmp(&ipv6_hdr(skb)->daddr, saddr, sizeof(*saddr))) { + pr_warn_ratelimited("dst addr %pI6 != qp source addr %pI6\n", + &ipv6_hdr(skb)->daddr, saddr); + goto err1; + } + + if (memcmp(&ipv6_hdr(skb)->saddr, daddr, sizeof(*daddr))) { + pr_warn_ratelimited("source addr %pI6 != qp dst addr %pI6\n", + &ipv6_hdr(skb)->saddr, daddr); + goto err1; + } + } + +done: + return 0; + +err1: + return -EINVAL; +} + +static int hdr_check(struct rxe_pkt_info *pkt) +{ + struct rxe_dev *rxe = pkt->rxe; + struct rxe_port *port = &rxe->port; + struct rxe_qp *qp = NULL; + u32 qpn = bth_qpn(pkt); + int index; + int err; + + if (unlikely(bth_tver(pkt) != BTH_TVER)) { + pr_warn_ratelimited("bad tver\n"); + goto err1; + } + + if (qpn != IB_MULTICAST_QPN) { + index = (qpn == 0) ? port->qp_smi_index : + ((qpn == 1) ? port->qp_gsi_index : qpn); + qp = rxe_pool_get_index(&rxe->qp_pool, index); + if (unlikely(!qp)) { + pr_warn_ratelimited("no qp matches qpn 0x%x\n", qpn); + goto err1; + } + + err = check_type_state(rxe, pkt, qp); + if (unlikely(err)) + goto err2; + + err = check_addr(rxe, pkt, qp); + if (unlikely(err)) + goto err2; + + err = check_keys(rxe, pkt, qpn, qp); + if (unlikely(err)) + goto err2; + } else { + if (unlikely((pkt->mask & RXE_GRH_MASK) == 0)) { + pr_warn_ratelimited("no grh for mcast qpn\n"); + goto err1; + } + } + + pkt->qp = qp; + return 0; + +err2: + if (qp) + rxe_drop_ref(qp); +err1: + return -EINVAL; +} + +static inline void rxe_rcv_pkt(struct rxe_dev *rxe, + struct rxe_pkt_info *pkt, + struct sk_buff *skb) +{ + if (pkt->mask & RXE_REQ_MASK) + rxe_resp_queue_pkt(rxe, pkt->qp, skb); + else + rxe_comp_queue_pkt(rxe, pkt->qp, skb); +} + +static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb) +{ + struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); + struct rxe_mc_grp *mcg; + struct sk_buff *skb_copy; + struct rxe_mc_elem *mce; + struct rxe_qp *qp; + union ib_gid dgid; + int err; + + if (skb->protocol == htons(ETH_P_IP)) + ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr, + (struct in6_addr *)&dgid); + else if (skb->protocol == htons(ETH_P_IPV6)) + memcpy(&dgid, &ipv6_hdr(skb)->daddr, sizeof(dgid)); + + /* lookup mcast group corresponding to mgid, takes a ref */ + mcg = rxe_pool_get_key(&rxe->mc_grp_pool, &dgid); + if (!mcg) + goto err1; /* mcast group not registered */ + + spin_lock_bh(&mcg->mcg_lock); + + list_for_each_entry(mce, &mcg->qp_list, qp_list) { + qp = mce->qp; + pkt = SKB_TO_PKT(skb); + + /* validate qp for incoming packet */ + err = check_type_state(rxe, pkt, qp); + if (err) + continue; + + err = check_keys(rxe, pkt, bth_qpn(pkt), qp); + if (err) + continue; + + /* if *not* the last qp in the list + * make a copy of the skb to post to the next qp + */ + skb_copy = (mce->qp_list.next != &mcg->qp_list) ? + skb_clone(skb, GFP_KERNEL) : NULL; + + pkt->qp = qp; + rxe_add_ref(qp); + rxe_rcv_pkt(rxe, pkt, skb); + + skb = skb_copy; + if (!skb) + break; + } + + spin_unlock_bh(&mcg->mcg_lock); + + rxe_drop_ref(mcg); /* drop ref from rxe_pool_get_key. */ + +err1: + if (skb) + kfree_skb(skb); +} + +static int rxe_match_dgid(struct rxe_dev *rxe, struct sk_buff *skb) +{ + union ib_gid dgid; + union ib_gid *pdgid; + u16 index; + + if (skb->protocol == htons(ETH_P_IP)) { + ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr, + (struct in6_addr *)&dgid); + pdgid = &dgid; + } else { + pdgid = (union ib_gid *)&ipv6_hdr(skb)->daddr; + } + + return ib_find_cached_gid_by_port(&rxe->ib_dev, pdgid, + IB_GID_TYPE_ROCE_UDP_ENCAP, + 1, rxe->ndev, &index); +} + +/* rxe_rcv is called from the interface driver */ +int rxe_rcv(struct sk_buff *skb) +{ + int err; + struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); + struct rxe_dev *rxe = pkt->rxe; + __be32 *icrcp; + u32 calc_icrc, pack_icrc; + + pkt->offset = 0; + + if (unlikely(skb->len < pkt->offset + RXE_BTH_BYTES)) + goto drop; + + if (unlikely(rxe_match_dgid(rxe, skb) < 0)) { + pr_warn_ratelimited("failed matching dgid\n"); + goto drop; + } + + pkt->opcode = bth_opcode(pkt); + pkt->psn = bth_psn(pkt); + pkt->qp = NULL; + pkt->mask |= rxe_opcode[pkt->opcode].mask; + + if (unlikely(skb->len < header_size(pkt))) + goto drop; + + err = hdr_check(pkt); + if (unlikely(err)) + goto drop; + + /* Verify ICRC */ + icrcp = (__be32 *)(pkt->hdr + pkt->paylen - RXE_ICRC_SIZE); + pack_icrc = be32_to_cpu(*icrcp); + + calc_icrc = rxe_icrc_hdr(pkt, skb); + calc_icrc = crc32_le(calc_icrc, (u8 *)payload_addr(pkt), payload_size(pkt)); + calc_icrc = cpu_to_be32(~calc_icrc); + if (unlikely(calc_icrc != pack_icrc)) { + char saddr[sizeof(struct in6_addr)]; + + if (skb->protocol == htons(ETH_P_IPV6)) + sprintf(saddr, "%pI6", &ipv6_hdr(skb)->saddr); + else if (skb->protocol == htons(ETH_P_IP)) + sprintf(saddr, "%pI4", &ip_hdr(skb)->saddr); + else + sprintf(saddr, "unknown"); + + pr_warn_ratelimited("bad ICRC from %s\n", saddr); + goto drop; + } + + if (unlikely(bth_qpn(pkt) == IB_MULTICAST_QPN)) + rxe_rcv_mcast_pkt(rxe, skb); + else + rxe_rcv_pkt(rxe, pkt, skb); + + return 0; + +drop: + if (pkt->qp) + rxe_drop_ref(pkt->qp); + + kfree_skb(skb); + return 0; +} +EXPORT_SYMBOL(rxe_rcv);