From e7549b926dd3ceec048f5689df90d4ec970c9419 Mon Sep 17 00:00:00 2001 From: Wolfgang Wiedmeyer Date: Fri, 23 Oct 2015 13:30:20 +0200 Subject: more driver stuff from 3.2.72 --- drivers/infiniband/hw/cxgb4/cm.c | 468 ++++++++++++++++++++++++++++++++++++--- 1 file changed, 433 insertions(+), 35 deletions(-) (limited to 'drivers/infiniband/hw/cxgb4/cm.c') diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c index 267005d..2e6a538 100644 --- a/drivers/infiniband/hw/cxgb4/cm.c +++ b/drivers/infiniband/hw/cxgb4/cm.c @@ -103,7 +103,8 @@ MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout " static int mpa_rev = 1; module_param(mpa_rev, int, 0644); MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, " - "1 is spec compliant. (default=1)"); + "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); @@ -497,17 +498,21 @@ static int send_connect(struct c4iw_ep *ep) return c4iw_l2t_send(&ep->com.dev->rdev, skb, ep->l2t); } -static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb) +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) { @@ -533,12 +538,41 @@ static void send_mpa_req(struct c4iw_ep *ep, struct sk_buff *skb) 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); + (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; + 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, ep->mpa_pkt + sizeof(*mpa), ep->plen); + 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 @@ -562,10 +596,13 @@ static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen) 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); @@ -595,8 +632,29 @@ static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen) mpa->flags = MPA_REJECT; mpa->revision = mpa_rev; mpa->private_data_size = htons(plen); - if (plen) - memcpy(mpa->private_data, pdata, 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 @@ -617,10 +675,13 @@ static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen) 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); @@ -649,10 +710,36 @@ static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen) memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) | (markers_enabled ? MPA_MARKERS : 0); - mpa->revision = mpa_rev; + mpa->revision = ep->mpa_attr.version; mpa->private_data_size = htons(plen); - if (plen) - memcpy(mpa->private_data, pdata, 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 @@ -695,7 +782,10 @@ static int act_establish(struct c4iw_dev *dev, struct sk_buff *skb) /* start MPA negotiation */ send_flowc(ep, NULL); - send_mpa_req(ep, skb); + if (ep->retry_with_mpa_v1) + send_mpa_req(ep, skb, 1); + else + send_mpa_req(ep, skb, mpa_rev); return 0; } @@ -769,8 +859,19 @@ static void connect_reply_upcall(struct c4iw_ep *ep, int status) event.remote_addr = ep->com.remote_addr; if ((status == 0) || (status == -ECONNREFUSED)) { - event.private_data_len = ep->plen; - event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); + if (!ep->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, @@ -793,9 +894,22 @@ static void connect_request_upcall(struct c4iw_ep *ep) event.event = IW_CM_EVENT_CONNECT_REQUEST; event.local_addr = ep->com.local_addr; event.remote_addr = ep->com.remote_addr; - event.private_data_len = ep->plen; - event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); event.provider_data = ep; + if (!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( @@ -813,6 +927,8 @@ static void established_upcall(struct c4iw_ep *ep) 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); @@ -848,7 +964,10 @@ static int update_rx_credits(struct c4iw_ep *ep, u32 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; @@ -888,7 +1007,9 @@ static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb) mpa = (struct mpa_message *) ep->mpa_pkt; /* Validate MPA header. */ - if (mpa->revision != mpa_rev) { + 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; } @@ -938,13 +1059,66 @@ static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb) ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; ep->mpa_attr.recv_marker_enabled = markers_enabled; ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; - ep->mpa_attr.version = mpa_rev; - ep->mpa_attr.p2p_type = peer2peer ? p2p_type : - FW_RI_INIT_P2PTYPE_DISABLED; + 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\n", __func__, - ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, - ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); + "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) && + (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; @@ -961,6 +1135,39 @@ static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb) 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); @@ -973,6 +1180,7 @@ out: 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); @@ -1013,7 +1221,9 @@ static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb) /* * Validate MPA Header. */ - if (mpa->revision != mpa_rev) { + 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; } @@ -1056,9 +1266,37 @@ static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb) ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; ep->mpa_attr.recv_marker_enabled = markers_enabled; ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; - ep->mpa_attr.version = mpa_rev; - ep->mpa_attr.p2p_type = peer2peer ? p2p_type : - FW_RI_INIT_P2PTYPE_DISABLED; + 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, @@ -1552,6 +1790,114 @@ static int is_neg_adv_abort(unsigned int status) status == CPL_ERR_PERSIST_NEG_ADVICE; } +static int c4iw_reconnect(struct c4iw_ep *ep) +{ + int err = 0; + struct rtable *rt; + struct net_device *pdev; + struct neighbour *neigh; + int step; + + 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; + + rcu_read_lock(); + neigh = dst_get_neighbour(ep->dst); + + /* get a l2t entry */ + if (neigh->dev->flags & IFF_LOOPBACK) { + PDBG("%s LOOPBACK\n", __func__); + pdev = ip_dev_find(&init_net, + ep->com.cm_id->remote_addr.sin_addr.s_addr); + ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t, + neigh, pdev, 0); + ep->mtu = pdev->mtu; + ep->tx_chan = cxgb4_port_chan(pdev); + ep->smac_idx = (cxgb4_port_viid(pdev) & 0x7F) << 1; + step = ep->com.dev->rdev.lldi.ntxq / + ep->com.dev->rdev.lldi.nchan; + ep->txq_idx = cxgb4_port_idx(pdev) * step; + step = ep->com.dev->rdev.lldi.nrxq / + ep->com.dev->rdev.lldi.nchan; + ep->ctrlq_idx = cxgb4_port_idx(pdev); + ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[ + cxgb4_port_idx(pdev) * step]; + dev_put(pdev); + } else { + ep->l2t = cxgb4_l2t_get(ep->com.dev->rdev.lldi.l2t, + neigh, neigh->dev, 0); + ep->mtu = dst_mtu(ep->dst); + ep->tx_chan = cxgb4_port_chan(neigh->dev); + ep->smac_idx = (cxgb4_port_viid(neigh->dev) & 0x7F) << 1; + step = ep->com.dev->rdev.lldi.ntxq / + ep->com.dev->rdev.lldi.nchan; + ep->txq_idx = cxgb4_port_idx(neigh->dev) * step; + ep->ctrlq_idx = cxgb4_port_idx(neigh->dev); + step = ep->com.dev->rdev.lldi.nrxq / + ep->com.dev->rdev.lldi.nchan; + ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[ + cxgb4_port_idx(neigh->dev) * step]; + } + rcu_read_unlock(); + if (!ep->l2t) { + printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__); + err = -ENOMEM; + 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); @@ -1575,8 +1921,11 @@ static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb) /* * Wake up any threads in rdma_init() or rdma_fini(). + * However, this is not needed if com state is just + * MPA_REQ_SENT */ - c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); + if (ep->com.state != MPA_REQ_SENT) + c4iw_wake_up(&ep->com.wr_wait, -ECONNRESET); mutex_lock(&ep->com.mutex); switch (ep->com.state) { @@ -1587,7 +1936,21 @@ static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb) break; case MPA_REQ_SENT: stop_ep_timer(ep); - connect_reply_upcall(ep, -ECONNRESET); + 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; @@ -1623,7 +1986,9 @@ static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb) dst_confirm(ep->dst); if (ep->com.state != ABORTING) { __state_set(&ep->com, DEAD); - release = 1; + /* 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); @@ -1643,6 +2008,15 @@ static int peer_abort(struct c4iw_dev *dev, struct sk_buff *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; } @@ -1794,18 +2168,40 @@ int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) goto err; } - cm_id->add_ref(cm_id); - ep->com.cm_id = cm_id; - ep->com.qp = qp; + 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 (peer2peer && ep->ird == 0) - ep->ird = 1; + 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; @@ -1947,6 +2343,8 @@ int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) ep->com.dev->rdev.lldi.nchan; ep->rss_qid = ep->com.dev->rdev.lldi.rxq_ids[ cxgb4_port_idx(neigh->dev) * step]; + ep->retry_with_mpa_v1 = 0; + ep->tried_with_mpa_v1 = 0; } rcu_read_unlock(); if (!ep->l2t) { -- cgit v1.1