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1287 lines
36 KiB
1287 lines
36 KiB
/* |
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* Copyright (c) 2006, 2019 Oracle and/or its affiliates. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenIB.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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* |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/in.h> |
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#include <linux/slab.h> |
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#include <linux/vmalloc.h> |
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#include <linux/ratelimit.h> |
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#include <net/addrconf.h> |
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#include <rdma/ib_cm.h> |
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|
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#include "rds_single_path.h" |
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#include "rds.h" |
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#include "ib.h" |
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#include "ib_mr.h" |
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|
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/* |
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* Set the selected protocol version |
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*/ |
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static void rds_ib_set_protocol(struct rds_connection *conn, unsigned int version) |
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{ |
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conn->c_version = version; |
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} |
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|
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/* |
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* Set up flow control |
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*/ |
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static void rds_ib_set_flow_control(struct rds_connection *conn, u32 credits) |
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{ |
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struct rds_ib_connection *ic = conn->c_transport_data; |
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|
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if (rds_ib_sysctl_flow_control && credits != 0) { |
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/* We're doing flow control */ |
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ic->i_flowctl = 1; |
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rds_ib_send_add_credits(conn, credits); |
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} else { |
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ic->i_flowctl = 0; |
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} |
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} |
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|
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/* |
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* Connection established. |
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* We get here for both outgoing and incoming connection. |
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*/ |
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void rds_ib_cm_connect_complete(struct rds_connection *conn, struct rdma_cm_event *event) |
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{ |
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struct rds_ib_connection *ic = conn->c_transport_data; |
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const union rds_ib_conn_priv *dp = NULL; |
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__be64 ack_seq = 0; |
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__be32 credit = 0; |
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u8 major = 0; |
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u8 minor = 0; |
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int err; |
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|
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dp = event->param.conn.private_data; |
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if (conn->c_isv6) { |
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if (event->param.conn.private_data_len >= |
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sizeof(struct rds6_ib_connect_private)) { |
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major = dp->ricp_v6.dp_protocol_major; |
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minor = dp->ricp_v6.dp_protocol_minor; |
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credit = dp->ricp_v6.dp_credit; |
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/* dp structure start is not guaranteed to be 8 bytes |
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* aligned. Since dp_ack_seq is 64-bit extended load |
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* operations can be used so go through get_unaligned |
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* to avoid unaligned errors. |
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*/ |
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ack_seq = get_unaligned(&dp->ricp_v6.dp_ack_seq); |
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} |
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} else if (event->param.conn.private_data_len >= |
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sizeof(struct rds_ib_connect_private)) { |
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major = dp->ricp_v4.dp_protocol_major; |
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minor = dp->ricp_v4.dp_protocol_minor; |
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credit = dp->ricp_v4.dp_credit; |
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ack_seq = get_unaligned(&dp->ricp_v4.dp_ack_seq); |
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} |
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|
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/* make sure it isn't empty data */ |
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if (major) { |
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rds_ib_set_protocol(conn, RDS_PROTOCOL(major, minor)); |
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rds_ib_set_flow_control(conn, be32_to_cpu(credit)); |
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} |
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|
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if (conn->c_version < RDS_PROTOCOL_VERSION) { |
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if (conn->c_version != RDS_PROTOCOL_COMPAT_VERSION) { |
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pr_notice("RDS/IB: Connection <%pI6c,%pI6c> version %u.%u no longer supported\n", |
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&conn->c_laddr, &conn->c_faddr, |
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RDS_PROTOCOL_MAJOR(conn->c_version), |
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RDS_PROTOCOL_MINOR(conn->c_version)); |
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rds_conn_destroy(conn); |
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return; |
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} |
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} |
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|
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pr_notice("RDS/IB: %s conn connected <%pI6c,%pI6c,%d> version %u.%u%s\n", |
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ic->i_active_side ? "Active" : "Passive", |
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&conn->c_laddr, &conn->c_faddr, conn->c_tos, |
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RDS_PROTOCOL_MAJOR(conn->c_version), |
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RDS_PROTOCOL_MINOR(conn->c_version), |
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ic->i_flowctl ? ", flow control" : ""); |
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|
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/* receive sl from the peer */ |
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ic->i_sl = ic->i_cm_id->route.path_rec->sl; |
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|
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atomic_set(&ic->i_cq_quiesce, 0); |
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|
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/* Init rings and fill recv. this needs to wait until protocol |
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* negotiation is complete, since ring layout is different |
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* from 3.1 to 4.1. |
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*/ |
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rds_ib_send_init_ring(ic); |
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rds_ib_recv_init_ring(ic); |
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/* Post receive buffers - as a side effect, this will update |
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* the posted credit count. */ |
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rds_ib_recv_refill(conn, 1, GFP_KERNEL); |
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|
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/* update ib_device with this local ipaddr */ |
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err = rds_ib_update_ipaddr(ic->rds_ibdev, &conn->c_laddr); |
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if (err) |
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printk(KERN_ERR "rds_ib_update_ipaddr failed (%d)\n", |
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err); |
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|
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/* If the peer gave us the last packet it saw, process this as if |
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* we had received a regular ACK. */ |
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if (dp) { |
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if (ack_seq) |
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rds_send_drop_acked(conn, be64_to_cpu(ack_seq), |
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NULL); |
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} |
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|
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conn->c_proposed_version = conn->c_version; |
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rds_connect_complete(conn); |
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} |
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|
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static void rds_ib_cm_fill_conn_param(struct rds_connection *conn, |
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struct rdma_conn_param *conn_param, |
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union rds_ib_conn_priv *dp, |
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u32 protocol_version, |
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u32 max_responder_resources, |
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u32 max_initiator_depth, |
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bool isv6) |
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{ |
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struct rds_ib_connection *ic = conn->c_transport_data; |
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struct rds_ib_device *rds_ibdev = ic->rds_ibdev; |
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|
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memset(conn_param, 0, sizeof(struct rdma_conn_param)); |
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|
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conn_param->responder_resources = |
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min_t(u32, rds_ibdev->max_responder_resources, max_responder_resources); |
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conn_param->initiator_depth = |
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min_t(u32, rds_ibdev->max_initiator_depth, max_initiator_depth); |
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conn_param->retry_count = min_t(unsigned int, rds_ib_retry_count, 7); |
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conn_param->rnr_retry_count = 7; |
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|
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if (dp) { |
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memset(dp, 0, sizeof(*dp)); |
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if (isv6) { |
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dp->ricp_v6.dp_saddr = conn->c_laddr; |
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dp->ricp_v6.dp_daddr = conn->c_faddr; |
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dp->ricp_v6.dp_protocol_major = |
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RDS_PROTOCOL_MAJOR(protocol_version); |
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dp->ricp_v6.dp_protocol_minor = |
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RDS_PROTOCOL_MINOR(protocol_version); |
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dp->ricp_v6.dp_protocol_minor_mask = |
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cpu_to_be16(RDS_IB_SUPPORTED_PROTOCOLS); |
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dp->ricp_v6.dp_ack_seq = |
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cpu_to_be64(rds_ib_piggyb_ack(ic)); |
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dp->ricp_v6.dp_cmn.ricpc_dp_toss = conn->c_tos; |
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|
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conn_param->private_data = &dp->ricp_v6; |
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conn_param->private_data_len = sizeof(dp->ricp_v6); |
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} else { |
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dp->ricp_v4.dp_saddr = conn->c_laddr.s6_addr32[3]; |
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dp->ricp_v4.dp_daddr = conn->c_faddr.s6_addr32[3]; |
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dp->ricp_v4.dp_protocol_major = |
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RDS_PROTOCOL_MAJOR(protocol_version); |
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dp->ricp_v4.dp_protocol_minor = |
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RDS_PROTOCOL_MINOR(protocol_version); |
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dp->ricp_v4.dp_protocol_minor_mask = |
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cpu_to_be16(RDS_IB_SUPPORTED_PROTOCOLS); |
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dp->ricp_v4.dp_ack_seq = |
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cpu_to_be64(rds_ib_piggyb_ack(ic)); |
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dp->ricp_v4.dp_cmn.ricpc_dp_toss = conn->c_tos; |
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|
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conn_param->private_data = &dp->ricp_v4; |
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conn_param->private_data_len = sizeof(dp->ricp_v4); |
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} |
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|
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/* Advertise flow control */ |
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if (ic->i_flowctl) { |
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unsigned int credits; |
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|
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credits = IB_GET_POST_CREDITS |
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(atomic_read(&ic->i_credits)); |
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if (isv6) |
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dp->ricp_v6.dp_credit = cpu_to_be32(credits); |
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else |
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dp->ricp_v4.dp_credit = cpu_to_be32(credits); |
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atomic_sub(IB_SET_POST_CREDITS(credits), |
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&ic->i_credits); |
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} |
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} |
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} |
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|
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static void rds_ib_cq_event_handler(struct ib_event *event, void *data) |
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{ |
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rdsdebug("event %u (%s) data %p\n", |
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event->event, ib_event_msg(event->event), data); |
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} |
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|
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/* Plucking the oldest entry from the ring can be done concurrently with |
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* the thread refilling the ring. Each ring operation is protected by |
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* spinlocks and the transient state of refilling doesn't change the |
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* recording of which entry is oldest. |
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* |
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* This relies on IB only calling one cq comp_handler for each cq so that |
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* there will only be one caller of rds_recv_incoming() per RDS connection. |
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*/ |
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static void rds_ib_cq_comp_handler_recv(struct ib_cq *cq, void *context) |
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{ |
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struct rds_connection *conn = context; |
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struct rds_ib_connection *ic = conn->c_transport_data; |
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|
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rdsdebug("conn %p cq %p\n", conn, cq); |
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|
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rds_ib_stats_inc(s_ib_evt_handler_call); |
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tasklet_schedule(&ic->i_recv_tasklet); |
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} |
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|
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static void poll_scq(struct rds_ib_connection *ic, struct ib_cq *cq, |
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struct ib_wc *wcs) |
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{ |
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int nr, i; |
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struct ib_wc *wc; |
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|
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while ((nr = ib_poll_cq(cq, RDS_IB_WC_MAX, wcs)) > 0) { |
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for (i = 0; i < nr; i++) { |
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wc = wcs + i; |
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rdsdebug("wc wr_id 0x%llx status %u byte_len %u imm_data %u\n", |
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(unsigned long long)wc->wr_id, wc->status, |
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wc->byte_len, be32_to_cpu(wc->ex.imm_data)); |
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|
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if (wc->wr_id <= ic->i_send_ring.w_nr || |
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wc->wr_id == RDS_IB_ACK_WR_ID) |
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rds_ib_send_cqe_handler(ic, wc); |
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else |
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rds_ib_mr_cqe_handler(ic, wc); |
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|
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} |
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} |
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} |
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|
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static void rds_ib_tasklet_fn_send(unsigned long data) |
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{ |
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struct rds_ib_connection *ic = (struct rds_ib_connection *)data; |
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struct rds_connection *conn = ic->conn; |
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|
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rds_ib_stats_inc(s_ib_tasklet_call); |
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|
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/* if cq has been already reaped, ignore incoming cq event */ |
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if (atomic_read(&ic->i_cq_quiesce)) |
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return; |
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poll_scq(ic, ic->i_send_cq, ic->i_send_wc); |
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ib_req_notify_cq(ic->i_send_cq, IB_CQ_NEXT_COMP); |
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poll_scq(ic, ic->i_send_cq, ic->i_send_wc); |
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|
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if (rds_conn_up(conn) && |
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(!test_bit(RDS_LL_SEND_FULL, &conn->c_flags) || |
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test_bit(0, &conn->c_map_queued))) |
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rds_send_xmit(&ic->conn->c_path[0]); |
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} |
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|
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static void poll_rcq(struct rds_ib_connection *ic, struct ib_cq *cq, |
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struct ib_wc *wcs, |
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struct rds_ib_ack_state *ack_state) |
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{ |
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int nr, i; |
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struct ib_wc *wc; |
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|
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while ((nr = ib_poll_cq(cq, RDS_IB_WC_MAX, wcs)) > 0) { |
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for (i = 0; i < nr; i++) { |
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wc = wcs + i; |
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rdsdebug("wc wr_id 0x%llx status %u byte_len %u imm_data %u\n", |
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(unsigned long long)wc->wr_id, wc->status, |
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wc->byte_len, be32_to_cpu(wc->ex.imm_data)); |
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|
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rds_ib_recv_cqe_handler(ic, wc, ack_state); |
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} |
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} |
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} |
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|
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static void rds_ib_tasklet_fn_recv(unsigned long data) |
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{ |
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struct rds_ib_connection *ic = (struct rds_ib_connection *)data; |
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struct rds_connection *conn = ic->conn; |
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struct rds_ib_device *rds_ibdev = ic->rds_ibdev; |
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struct rds_ib_ack_state state; |
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|
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if (!rds_ibdev) |
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rds_conn_drop(conn); |
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|
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rds_ib_stats_inc(s_ib_tasklet_call); |
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|
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/* if cq has been already reaped, ignore incoming cq event */ |
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if (atomic_read(&ic->i_cq_quiesce)) |
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return; |
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|
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memset(&state, 0, sizeof(state)); |
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poll_rcq(ic, ic->i_recv_cq, ic->i_recv_wc, &state); |
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ib_req_notify_cq(ic->i_recv_cq, IB_CQ_SOLICITED); |
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poll_rcq(ic, ic->i_recv_cq, ic->i_recv_wc, &state); |
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|
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if (state.ack_next_valid) |
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rds_ib_set_ack(ic, state.ack_next, state.ack_required); |
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if (state.ack_recv_valid && state.ack_recv > ic->i_ack_recv) { |
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rds_send_drop_acked(conn, state.ack_recv, NULL); |
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ic->i_ack_recv = state.ack_recv; |
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} |
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|
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if (rds_conn_up(conn)) |
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rds_ib_attempt_ack(ic); |
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} |
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|
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static void rds_ib_qp_event_handler(struct ib_event *event, void *data) |
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{ |
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struct rds_connection *conn = data; |
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struct rds_ib_connection *ic = conn->c_transport_data; |
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|
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rdsdebug("conn %p ic %p event %u (%s)\n", conn, ic, event->event, |
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ib_event_msg(event->event)); |
|
|
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switch (event->event) { |
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case IB_EVENT_COMM_EST: |
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rdma_notify(ic->i_cm_id, IB_EVENT_COMM_EST); |
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break; |
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default: |
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rdsdebug("Fatal QP Event %u (%s) - connection %pI6c->%pI6c, reconnecting\n", |
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event->event, ib_event_msg(event->event), |
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&conn->c_laddr, &conn->c_faddr); |
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rds_conn_drop(conn); |
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break; |
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} |
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} |
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|
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static void rds_ib_cq_comp_handler_send(struct ib_cq *cq, void *context) |
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{ |
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struct rds_connection *conn = context; |
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struct rds_ib_connection *ic = conn->c_transport_data; |
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|
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rdsdebug("conn %p cq %p\n", conn, cq); |
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|
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rds_ib_stats_inc(s_ib_evt_handler_call); |
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|
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tasklet_schedule(&ic->i_send_tasklet); |
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} |
|
|
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static inline int ibdev_get_unused_vector(struct rds_ib_device *rds_ibdev) |
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{ |
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int min = rds_ibdev->vector_load[rds_ibdev->dev->num_comp_vectors - 1]; |
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int index = rds_ibdev->dev->num_comp_vectors - 1; |
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int i; |
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|
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for (i = rds_ibdev->dev->num_comp_vectors - 1; i >= 0; i--) { |
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if (rds_ibdev->vector_load[i] < min) { |
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index = i; |
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min = rds_ibdev->vector_load[i]; |
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} |
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} |
|
|
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rds_ibdev->vector_load[index]++; |
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return index; |
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} |
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|
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static inline void ibdev_put_vector(struct rds_ib_device *rds_ibdev, int index) |
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{ |
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rds_ibdev->vector_load[index]--; |
|
} |
|
|
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static void rds_dma_hdr_free(struct ib_device *dev, struct rds_header *hdr, |
|
dma_addr_t dma_addr, enum dma_data_direction dir) |
|
{ |
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ib_dma_unmap_single(dev, dma_addr, sizeof(*hdr), dir); |
|
kfree(hdr); |
|
} |
|
|
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static struct rds_header *rds_dma_hdr_alloc(struct ib_device *dev, |
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dma_addr_t *dma_addr, enum dma_data_direction dir) |
|
{ |
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struct rds_header *hdr; |
|
|
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hdr = kzalloc_node(sizeof(*hdr), GFP_KERNEL, ibdev_to_node(dev)); |
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if (!hdr) |
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return NULL; |
|
|
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*dma_addr = ib_dma_map_single(dev, hdr, sizeof(*hdr), |
|
DMA_BIDIRECTIONAL); |
|
if (ib_dma_mapping_error(dev, *dma_addr)) { |
|
kfree(hdr); |
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return NULL; |
|
} |
|
|
|
return hdr; |
|
} |
|
|
|
/* Free the DMA memory used to store struct rds_header. |
|
* |
|
* @dev: the RDS IB device |
|
* @hdrs: pointer to the array storing DMA memory pointers |
|
* @dma_addrs: pointer to the array storing DMA addresses |
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* @num_hdars: number of headers to free. |
|
*/ |
|
static void rds_dma_hdrs_free(struct rds_ib_device *dev, |
|
struct rds_header **hdrs, dma_addr_t *dma_addrs, u32 num_hdrs, |
|
enum dma_data_direction dir) |
|
{ |
|
u32 i; |
|
|
|
for (i = 0; i < num_hdrs; i++) |
|
rds_dma_hdr_free(dev->dev, hdrs[i], dma_addrs[i], dir); |
|
kvfree(hdrs); |
|
kvfree(dma_addrs); |
|
} |
|
|
|
|
|
/* Allocate DMA coherent memory to be used to store struct rds_header for |
|
* sending/receiving packets. The pointers to the DMA memory and the |
|
* associated DMA addresses are stored in two arrays. |
|
* |
|
* @dev: the RDS IB device |
|
* @dma_addrs: pointer to the array for storing DMA addresses |
|
* @num_hdrs: number of headers to allocate |
|
* |
|
* It returns the pointer to the array storing the DMA memory pointers. On |
|
* error, NULL pointer is returned. |
|
*/ |
|
static struct rds_header **rds_dma_hdrs_alloc(struct rds_ib_device *dev, |
|
dma_addr_t **dma_addrs, u32 num_hdrs, |
|
enum dma_data_direction dir) |
|
{ |
|
struct rds_header **hdrs; |
|
dma_addr_t *hdr_daddrs; |
|
u32 i; |
|
|
|
hdrs = kvmalloc_node(sizeof(*hdrs) * num_hdrs, GFP_KERNEL, |
|
ibdev_to_node(dev->dev)); |
|
if (!hdrs) |
|
return NULL; |
|
|
|
hdr_daddrs = kvmalloc_node(sizeof(*hdr_daddrs) * num_hdrs, GFP_KERNEL, |
|
ibdev_to_node(dev->dev)); |
|
if (!hdr_daddrs) { |
|
kvfree(hdrs); |
|
return NULL; |
|
} |
|
|
|
for (i = 0; i < num_hdrs; i++) { |
|
hdrs[i] = rds_dma_hdr_alloc(dev->dev, &hdr_daddrs[i], dir); |
|
if (!hdrs[i]) { |
|
rds_dma_hdrs_free(dev, hdrs, hdr_daddrs, i, dir); |
|
return NULL; |
|
} |
|
} |
|
|
|
*dma_addrs = hdr_daddrs; |
|
return hdrs; |
|
} |
|
|
|
/* |
|
* This needs to be very careful to not leave IS_ERR pointers around for |
|
* cleanup to trip over. |
|
*/ |
|
static int rds_ib_setup_qp(struct rds_connection *conn) |
|
{ |
|
struct rds_ib_connection *ic = conn->c_transport_data; |
|
struct ib_device *dev = ic->i_cm_id->device; |
|
struct ib_qp_init_attr attr; |
|
struct ib_cq_init_attr cq_attr = {}; |
|
struct rds_ib_device *rds_ibdev; |
|
unsigned long max_wrs; |
|
int ret, fr_queue_space; |
|
|
|
/* |
|
* It's normal to see a null device if an incoming connection races |
|
* with device removal, so we don't print a warning. |
|
*/ |
|
rds_ibdev = rds_ib_get_client_data(dev); |
|
if (!rds_ibdev) |
|
return -EOPNOTSUPP; |
|
|
|
/* The fr_queue_space is currently set to 512, to add extra space on |
|
* completion queue and send queue. This extra space is used for FRWR |
|
* registration and invalidation work requests |
|
*/ |
|
fr_queue_space = RDS_IB_DEFAULT_FR_WR; |
|
|
|
/* add the conn now so that connection establishment has the dev */ |
|
rds_ib_add_conn(rds_ibdev, conn); |
|
|
|
max_wrs = rds_ibdev->max_wrs < rds_ib_sysctl_max_send_wr + 1 ? |
|
rds_ibdev->max_wrs - 1 : rds_ib_sysctl_max_send_wr; |
|
if (ic->i_send_ring.w_nr != max_wrs) |
|
rds_ib_ring_resize(&ic->i_send_ring, max_wrs); |
|
|
|
max_wrs = rds_ibdev->max_wrs < rds_ib_sysctl_max_recv_wr + 1 ? |
|
rds_ibdev->max_wrs - 1 : rds_ib_sysctl_max_recv_wr; |
|
if (ic->i_recv_ring.w_nr != max_wrs) |
|
rds_ib_ring_resize(&ic->i_recv_ring, max_wrs); |
|
|
|
/* Protection domain and memory range */ |
|
ic->i_pd = rds_ibdev->pd; |
|
|
|
ic->i_scq_vector = ibdev_get_unused_vector(rds_ibdev); |
|
cq_attr.cqe = ic->i_send_ring.w_nr + fr_queue_space + 1; |
|
cq_attr.comp_vector = ic->i_scq_vector; |
|
ic->i_send_cq = ib_create_cq(dev, rds_ib_cq_comp_handler_send, |
|
rds_ib_cq_event_handler, conn, |
|
&cq_attr); |
|
if (IS_ERR(ic->i_send_cq)) { |
|
ret = PTR_ERR(ic->i_send_cq); |
|
ic->i_send_cq = NULL; |
|
ibdev_put_vector(rds_ibdev, ic->i_scq_vector); |
|
rdsdebug("ib_create_cq send failed: %d\n", ret); |
|
goto rds_ibdev_out; |
|
} |
|
|
|
ic->i_rcq_vector = ibdev_get_unused_vector(rds_ibdev); |
|
cq_attr.cqe = ic->i_recv_ring.w_nr; |
|
cq_attr.comp_vector = ic->i_rcq_vector; |
|
ic->i_recv_cq = ib_create_cq(dev, rds_ib_cq_comp_handler_recv, |
|
rds_ib_cq_event_handler, conn, |
|
&cq_attr); |
|
if (IS_ERR(ic->i_recv_cq)) { |
|
ret = PTR_ERR(ic->i_recv_cq); |
|
ic->i_recv_cq = NULL; |
|
ibdev_put_vector(rds_ibdev, ic->i_rcq_vector); |
|
rdsdebug("ib_create_cq recv failed: %d\n", ret); |
|
goto send_cq_out; |
|
} |
|
|
|
ret = ib_req_notify_cq(ic->i_send_cq, IB_CQ_NEXT_COMP); |
|
if (ret) { |
|
rdsdebug("ib_req_notify_cq send failed: %d\n", ret); |
|
goto recv_cq_out; |
|
} |
|
|
|
ret = ib_req_notify_cq(ic->i_recv_cq, IB_CQ_SOLICITED); |
|
if (ret) { |
|
rdsdebug("ib_req_notify_cq recv failed: %d\n", ret); |
|
goto recv_cq_out; |
|
} |
|
|
|
/* XXX negotiate max send/recv with remote? */ |
|
memset(&attr, 0, sizeof(attr)); |
|
attr.event_handler = rds_ib_qp_event_handler; |
|
attr.qp_context = conn; |
|
/* + 1 to allow for the single ack message */ |
|
attr.cap.max_send_wr = ic->i_send_ring.w_nr + fr_queue_space + 1; |
|
attr.cap.max_recv_wr = ic->i_recv_ring.w_nr + 1; |
|
attr.cap.max_send_sge = rds_ibdev->max_sge; |
|
attr.cap.max_recv_sge = RDS_IB_RECV_SGE; |
|
attr.sq_sig_type = IB_SIGNAL_REQ_WR; |
|
attr.qp_type = IB_QPT_RC; |
|
attr.send_cq = ic->i_send_cq; |
|
attr.recv_cq = ic->i_recv_cq; |
|
|
|
/* |
|
* XXX this can fail if max_*_wr is too large? Are we supposed |
|
* to back off until we get a value that the hardware can support? |
|
*/ |
|
ret = rdma_create_qp(ic->i_cm_id, ic->i_pd, &attr); |
|
if (ret) { |
|
rdsdebug("rdma_create_qp failed: %d\n", ret); |
|
goto recv_cq_out; |
|
} |
|
|
|
ic->i_send_hdrs = rds_dma_hdrs_alloc(rds_ibdev, &ic->i_send_hdrs_dma, |
|
ic->i_send_ring.w_nr, |
|
DMA_TO_DEVICE); |
|
if (!ic->i_send_hdrs) { |
|
ret = -ENOMEM; |
|
rdsdebug("DMA send hdrs alloc failed\n"); |
|
goto qp_out; |
|
} |
|
|
|
ic->i_recv_hdrs = rds_dma_hdrs_alloc(rds_ibdev, &ic->i_recv_hdrs_dma, |
|
ic->i_recv_ring.w_nr, |
|
DMA_FROM_DEVICE); |
|
if (!ic->i_recv_hdrs) { |
|
ret = -ENOMEM; |
|
rdsdebug("DMA recv hdrs alloc failed\n"); |
|
goto send_hdrs_dma_out; |
|
} |
|
|
|
ic->i_ack = rds_dma_hdr_alloc(rds_ibdev->dev, &ic->i_ack_dma, |
|
DMA_TO_DEVICE); |
|
if (!ic->i_ack) { |
|
ret = -ENOMEM; |
|
rdsdebug("DMA ack header alloc failed\n"); |
|
goto recv_hdrs_dma_out; |
|
} |
|
|
|
ic->i_sends = vzalloc_node(array_size(sizeof(struct rds_ib_send_work), |
|
ic->i_send_ring.w_nr), |
|
ibdev_to_node(dev)); |
|
if (!ic->i_sends) { |
|
ret = -ENOMEM; |
|
rdsdebug("send allocation failed\n"); |
|
goto ack_dma_out; |
|
} |
|
|
|
ic->i_recvs = vzalloc_node(array_size(sizeof(struct rds_ib_recv_work), |
|
ic->i_recv_ring.w_nr), |
|
ibdev_to_node(dev)); |
|
if (!ic->i_recvs) { |
|
ret = -ENOMEM; |
|
rdsdebug("recv allocation failed\n"); |
|
goto sends_out; |
|
} |
|
|
|
rds_ib_recv_init_ack(ic); |
|
|
|
rdsdebug("conn %p pd %p cq %p %p\n", conn, ic->i_pd, |
|
ic->i_send_cq, ic->i_recv_cq); |
|
|
|
goto out; |
|
|
|
sends_out: |
|
vfree(ic->i_sends); |
|
|
|
ack_dma_out: |
|
rds_dma_hdr_free(rds_ibdev->dev, ic->i_ack, ic->i_ack_dma, |
|
DMA_TO_DEVICE); |
|
ic->i_ack = NULL; |
|
|
|
recv_hdrs_dma_out: |
|
rds_dma_hdrs_free(rds_ibdev, ic->i_recv_hdrs, ic->i_recv_hdrs_dma, |
|
ic->i_recv_ring.w_nr, DMA_FROM_DEVICE); |
|
ic->i_recv_hdrs = NULL; |
|
ic->i_recv_hdrs_dma = NULL; |
|
|
|
send_hdrs_dma_out: |
|
rds_dma_hdrs_free(rds_ibdev, ic->i_send_hdrs, ic->i_send_hdrs_dma, |
|
ic->i_send_ring.w_nr, DMA_TO_DEVICE); |
|
ic->i_send_hdrs = NULL; |
|
ic->i_send_hdrs_dma = NULL; |
|
|
|
qp_out: |
|
rdma_destroy_qp(ic->i_cm_id); |
|
recv_cq_out: |
|
ib_destroy_cq(ic->i_recv_cq); |
|
ic->i_recv_cq = NULL; |
|
send_cq_out: |
|
ib_destroy_cq(ic->i_send_cq); |
|
ic->i_send_cq = NULL; |
|
rds_ibdev_out: |
|
rds_ib_remove_conn(rds_ibdev, conn); |
|
out: |
|
rds_ib_dev_put(rds_ibdev); |
|
|
|
return ret; |
|
} |
|
|
|
static u32 rds_ib_protocol_compatible(struct rdma_cm_event *event, bool isv6) |
|
{ |
|
const union rds_ib_conn_priv *dp = event->param.conn.private_data; |
|
u8 data_len, major, minor; |
|
u32 version = 0; |
|
__be16 mask; |
|
u16 common; |
|
|
|
/* |
|
* rdma_cm private data is odd - when there is any private data in the |
|
* request, we will be given a pretty large buffer without telling us the |
|
* original size. The only way to tell the difference is by looking at |
|
* the contents, which are initialized to zero. |
|
* If the protocol version fields aren't set, this is a connection attempt |
|
* from an older version. This could be 3.0 or 2.0 - we can't tell. |
|
* We really should have changed this for OFED 1.3 :-( |
|
*/ |
|
|
|
/* Be paranoid. RDS always has privdata */ |
|
if (!event->param.conn.private_data_len) { |
|
printk(KERN_NOTICE "RDS incoming connection has no private data, " |
|
"rejecting\n"); |
|
return 0; |
|
} |
|
|
|
if (isv6) { |
|
data_len = sizeof(struct rds6_ib_connect_private); |
|
major = dp->ricp_v6.dp_protocol_major; |
|
minor = dp->ricp_v6.dp_protocol_minor; |
|
mask = dp->ricp_v6.dp_protocol_minor_mask; |
|
} else { |
|
data_len = sizeof(struct rds_ib_connect_private); |
|
major = dp->ricp_v4.dp_protocol_major; |
|
minor = dp->ricp_v4.dp_protocol_minor; |
|
mask = dp->ricp_v4.dp_protocol_minor_mask; |
|
} |
|
|
|
/* Even if len is crap *now* I still want to check it. -ASG */ |
|
if (event->param.conn.private_data_len < data_len || major == 0) |
|
return RDS_PROTOCOL_4_0; |
|
|
|
common = be16_to_cpu(mask) & RDS_IB_SUPPORTED_PROTOCOLS; |
|
if (major == 4 && common) { |
|
version = RDS_PROTOCOL_4_0; |
|
while ((common >>= 1) != 0) |
|
version++; |
|
} else if (RDS_PROTOCOL_COMPAT_VERSION == |
|
RDS_PROTOCOL(major, minor)) { |
|
version = RDS_PROTOCOL_COMPAT_VERSION; |
|
} else { |
|
if (isv6) |
|
printk_ratelimited(KERN_NOTICE "RDS: Connection from %pI6c using incompatible protocol version %u.%u\n", |
|
&dp->ricp_v6.dp_saddr, major, minor); |
|
else |
|
printk_ratelimited(KERN_NOTICE "RDS: Connection from %pI4 using incompatible protocol version %u.%u\n", |
|
&dp->ricp_v4.dp_saddr, major, minor); |
|
} |
|
return version; |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
/* Given an IPv6 address, find the net_device which hosts that address and |
|
* return its index. This is used by the rds_ib_cm_handle_connect() code to |
|
* find the interface index of where an incoming request comes from when |
|
* the request is using a link local address. |
|
* |
|
* Note one problem in this search. It is possible that two interfaces have |
|
* the same link local address. Unfortunately, this cannot be solved unless |
|
* the underlying layer gives us the interface which an incoming RDMA connect |
|
* request comes from. |
|
*/ |
|
static u32 __rds_find_ifindex(struct net *net, const struct in6_addr *addr) |
|
{ |
|
struct net_device *dev; |
|
int idx = 0; |
|
|
|
rcu_read_lock(); |
|
for_each_netdev_rcu(net, dev) { |
|
if (ipv6_chk_addr(net, addr, dev, 1)) { |
|
idx = dev->ifindex; |
|
break; |
|
} |
|
} |
|
rcu_read_unlock(); |
|
|
|
return idx; |
|
} |
|
#endif |
|
|
|
int rds_ib_cm_handle_connect(struct rdma_cm_id *cm_id, |
|
struct rdma_cm_event *event, bool isv6) |
|
{ |
|
__be64 lguid = cm_id->route.path_rec->sgid.global.interface_id; |
|
__be64 fguid = cm_id->route.path_rec->dgid.global.interface_id; |
|
const struct rds_ib_conn_priv_cmn *dp_cmn; |
|
struct rds_connection *conn = NULL; |
|
struct rds_ib_connection *ic = NULL; |
|
struct rdma_conn_param conn_param; |
|
const union rds_ib_conn_priv *dp; |
|
union rds_ib_conn_priv dp_rep; |
|
struct in6_addr s_mapped_addr; |
|
struct in6_addr d_mapped_addr; |
|
const struct in6_addr *saddr6; |
|
const struct in6_addr *daddr6; |
|
int destroy = 1; |
|
u32 ifindex = 0; |
|
u32 version; |
|
int err = 1; |
|
|
|
/* Check whether the remote protocol version matches ours. */ |
|
version = rds_ib_protocol_compatible(event, isv6); |
|
if (!version) { |
|
err = RDS_RDMA_REJ_INCOMPAT; |
|
goto out; |
|
} |
|
|
|
dp = event->param.conn.private_data; |
|
if (isv6) { |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
dp_cmn = &dp->ricp_v6.dp_cmn; |
|
saddr6 = &dp->ricp_v6.dp_saddr; |
|
daddr6 = &dp->ricp_v6.dp_daddr; |
|
/* If either address is link local, need to find the |
|
* interface index in order to create a proper RDS |
|
* connection. |
|
*/ |
|
if (ipv6_addr_type(daddr6) & IPV6_ADDR_LINKLOCAL) { |
|
/* Using init_net for now .. */ |
|
ifindex = __rds_find_ifindex(&init_net, daddr6); |
|
/* No index found... Need to bail out. */ |
|
if (ifindex == 0) { |
|
err = -EOPNOTSUPP; |
|
goto out; |
|
} |
|
} else if (ipv6_addr_type(saddr6) & IPV6_ADDR_LINKLOCAL) { |
|
/* Use our address to find the correct index. */ |
|
ifindex = __rds_find_ifindex(&init_net, daddr6); |
|
/* No index found... Need to bail out. */ |
|
if (ifindex == 0) { |
|
err = -EOPNOTSUPP; |
|
goto out; |
|
} |
|
} |
|
#else |
|
err = -EOPNOTSUPP; |
|
goto out; |
|
#endif |
|
} else { |
|
dp_cmn = &dp->ricp_v4.dp_cmn; |
|
ipv6_addr_set_v4mapped(dp->ricp_v4.dp_saddr, &s_mapped_addr); |
|
ipv6_addr_set_v4mapped(dp->ricp_v4.dp_daddr, &d_mapped_addr); |
|
saddr6 = &s_mapped_addr; |
|
daddr6 = &d_mapped_addr; |
|
} |
|
|
|
rdsdebug("saddr %pI6c daddr %pI6c RDSv%u.%u lguid 0x%llx fguid 0x%llx, tos:%d\n", |
|
saddr6, daddr6, RDS_PROTOCOL_MAJOR(version), |
|
RDS_PROTOCOL_MINOR(version), |
|
(unsigned long long)be64_to_cpu(lguid), |
|
(unsigned long long)be64_to_cpu(fguid), dp_cmn->ricpc_dp_toss); |
|
|
|
/* RDS/IB is not currently netns aware, thus init_net */ |
|
conn = rds_conn_create(&init_net, daddr6, saddr6, |
|
&rds_ib_transport, dp_cmn->ricpc_dp_toss, |
|
GFP_KERNEL, ifindex); |
|
if (IS_ERR(conn)) { |
|
rdsdebug("rds_conn_create failed (%ld)\n", PTR_ERR(conn)); |
|
conn = NULL; |
|
goto out; |
|
} |
|
|
|
/* |
|
* The connection request may occur while the |
|
* previous connection exist, e.g. in case of failover. |
|
* But as connections may be initiated simultaneously |
|
* by both hosts, we have a random backoff mechanism - |
|
* see the comment above rds_queue_reconnect() |
|
*/ |
|
mutex_lock(&conn->c_cm_lock); |
|
if (!rds_conn_transition(conn, RDS_CONN_DOWN, RDS_CONN_CONNECTING)) { |
|
if (rds_conn_state(conn) == RDS_CONN_UP) { |
|
rdsdebug("incoming connect while connecting\n"); |
|
rds_conn_drop(conn); |
|
rds_ib_stats_inc(s_ib_listen_closed_stale); |
|
} else |
|
if (rds_conn_state(conn) == RDS_CONN_CONNECTING) { |
|
/* Wait and see - our connect may still be succeeding */ |
|
rds_ib_stats_inc(s_ib_connect_raced); |
|
} |
|
goto out; |
|
} |
|
|
|
ic = conn->c_transport_data; |
|
|
|
rds_ib_set_protocol(conn, version); |
|
rds_ib_set_flow_control(conn, be32_to_cpu(dp_cmn->ricpc_credit)); |
|
|
|
/* If the peer gave us the last packet it saw, process this as if |
|
* we had received a regular ACK. */ |
|
if (dp_cmn->ricpc_ack_seq) |
|
rds_send_drop_acked(conn, be64_to_cpu(dp_cmn->ricpc_ack_seq), |
|
NULL); |
|
|
|
BUG_ON(cm_id->context); |
|
BUG_ON(ic->i_cm_id); |
|
|
|
ic->i_cm_id = cm_id; |
|
cm_id->context = conn; |
|
|
|
/* We got halfway through setting up the ib_connection, if we |
|
* fail now, we have to take the long route out of this mess. */ |
|
destroy = 0; |
|
|
|
err = rds_ib_setup_qp(conn); |
|
if (err) { |
|
rds_ib_conn_error(conn, "rds_ib_setup_qp failed (%d)\n", err); |
|
goto out; |
|
} |
|
|
|
rds_ib_cm_fill_conn_param(conn, &conn_param, &dp_rep, version, |
|
event->param.conn.responder_resources, |
|
event->param.conn.initiator_depth, isv6); |
|
|
|
rdma_set_min_rnr_timer(cm_id, IB_RNR_TIMER_000_32); |
|
/* rdma_accept() calls rdma_reject() internally if it fails */ |
|
if (rdma_accept(cm_id, &conn_param)) |
|
rds_ib_conn_error(conn, "rdma_accept failed\n"); |
|
|
|
out: |
|
if (conn) |
|
mutex_unlock(&conn->c_cm_lock); |
|
if (err) |
|
rdma_reject(cm_id, &err, sizeof(int), |
|
IB_CM_REJ_CONSUMER_DEFINED); |
|
return destroy; |
|
} |
|
|
|
|
|
int rds_ib_cm_initiate_connect(struct rdma_cm_id *cm_id, bool isv6) |
|
{ |
|
struct rds_connection *conn = cm_id->context; |
|
struct rds_ib_connection *ic = conn->c_transport_data; |
|
struct rdma_conn_param conn_param; |
|
union rds_ib_conn_priv dp; |
|
int ret; |
|
|
|
/* If the peer doesn't do protocol negotiation, we must |
|
* default to RDSv3.0 */ |
|
rds_ib_set_protocol(conn, RDS_PROTOCOL_4_1); |
|
ic->i_flowctl = rds_ib_sysctl_flow_control; /* advertise flow control */ |
|
|
|
ret = rds_ib_setup_qp(conn); |
|
if (ret) { |
|
rds_ib_conn_error(conn, "rds_ib_setup_qp failed (%d)\n", ret); |
|
goto out; |
|
} |
|
|
|
rds_ib_cm_fill_conn_param(conn, &conn_param, &dp, |
|
conn->c_proposed_version, |
|
UINT_MAX, UINT_MAX, isv6); |
|
ret = rdma_connect_locked(cm_id, &conn_param); |
|
if (ret) |
|
rds_ib_conn_error(conn, "rdma_connect_locked failed (%d)\n", |
|
ret); |
|
|
|
out: |
|
/* Beware - returning non-zero tells the rdma_cm to destroy |
|
* the cm_id. We should certainly not do it as long as we still |
|
* "own" the cm_id. */ |
|
if (ret) { |
|
if (ic->i_cm_id == cm_id) |
|
ret = 0; |
|
} |
|
ic->i_active_side = true; |
|
return ret; |
|
} |
|
|
|
int rds_ib_conn_path_connect(struct rds_conn_path *cp) |
|
{ |
|
struct rds_connection *conn = cp->cp_conn; |
|
struct sockaddr_storage src, dest; |
|
rdma_cm_event_handler handler; |
|
struct rds_ib_connection *ic; |
|
int ret; |
|
|
|
ic = conn->c_transport_data; |
|
|
|
/* XXX I wonder what affect the port space has */ |
|
/* delegate cm event handler to rdma_transport */ |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
if (conn->c_isv6) |
|
handler = rds6_rdma_cm_event_handler; |
|
else |
|
#endif |
|
handler = rds_rdma_cm_event_handler; |
|
ic->i_cm_id = rdma_create_id(&init_net, handler, conn, |
|
RDMA_PS_TCP, IB_QPT_RC); |
|
if (IS_ERR(ic->i_cm_id)) { |
|
ret = PTR_ERR(ic->i_cm_id); |
|
ic->i_cm_id = NULL; |
|
rdsdebug("rdma_create_id() failed: %d\n", ret); |
|
goto out; |
|
} |
|
|
|
rdsdebug("created cm id %p for conn %p\n", ic->i_cm_id, conn); |
|
|
|
if (ipv6_addr_v4mapped(&conn->c_faddr)) { |
|
struct sockaddr_in *sin; |
|
|
|
sin = (struct sockaddr_in *)&src; |
|
sin->sin_family = AF_INET; |
|
sin->sin_addr.s_addr = conn->c_laddr.s6_addr32[3]; |
|
sin->sin_port = 0; |
|
|
|
sin = (struct sockaddr_in *)&dest; |
|
sin->sin_family = AF_INET; |
|
sin->sin_addr.s_addr = conn->c_faddr.s6_addr32[3]; |
|
sin->sin_port = htons(RDS_PORT); |
|
} else { |
|
struct sockaddr_in6 *sin6; |
|
|
|
sin6 = (struct sockaddr_in6 *)&src; |
|
sin6->sin6_family = AF_INET6; |
|
sin6->sin6_addr = conn->c_laddr; |
|
sin6->sin6_port = 0; |
|
sin6->sin6_scope_id = conn->c_dev_if; |
|
|
|
sin6 = (struct sockaddr_in6 *)&dest; |
|
sin6->sin6_family = AF_INET6; |
|
sin6->sin6_addr = conn->c_faddr; |
|
sin6->sin6_port = htons(RDS_CM_PORT); |
|
sin6->sin6_scope_id = conn->c_dev_if; |
|
} |
|
|
|
ret = rdma_resolve_addr(ic->i_cm_id, (struct sockaddr *)&src, |
|
(struct sockaddr *)&dest, |
|
RDS_RDMA_RESOLVE_TIMEOUT_MS); |
|
if (ret) { |
|
rdsdebug("addr resolve failed for cm id %p: %d\n", ic->i_cm_id, |
|
ret); |
|
rdma_destroy_id(ic->i_cm_id); |
|
ic->i_cm_id = NULL; |
|
} |
|
|
|
out: |
|
return ret; |
|
} |
|
|
|
/* |
|
* This is so careful about only cleaning up resources that were built up |
|
* so that it can be called at any point during startup. In fact it |
|
* can be called multiple times for a given connection. |
|
*/ |
|
void rds_ib_conn_path_shutdown(struct rds_conn_path *cp) |
|
{ |
|
struct rds_connection *conn = cp->cp_conn; |
|
struct rds_ib_connection *ic = conn->c_transport_data; |
|
int err = 0; |
|
|
|
rdsdebug("cm %p pd %p cq %p %p qp %p\n", ic->i_cm_id, |
|
ic->i_pd, ic->i_send_cq, ic->i_recv_cq, |
|
ic->i_cm_id ? ic->i_cm_id->qp : NULL); |
|
|
|
if (ic->i_cm_id) { |
|
rdsdebug("disconnecting cm %p\n", ic->i_cm_id); |
|
err = rdma_disconnect(ic->i_cm_id); |
|
if (err) { |
|
/* Actually this may happen quite frequently, when |
|
* an outgoing connect raced with an incoming connect. |
|
*/ |
|
rdsdebug("failed to disconnect, cm: %p err %d\n", |
|
ic->i_cm_id, err); |
|
} |
|
|
|
/* kick off "flush_worker" for all pools in order to reap |
|
* all FRMR registrations that are still marked "FRMR_IS_INUSE" |
|
*/ |
|
rds_ib_flush_mrs(); |
|
|
|
/* |
|
* We want to wait for tx and rx completion to finish |
|
* before we tear down the connection, but we have to be |
|
* careful not to get stuck waiting on a send ring that |
|
* only has unsignaled sends in it. We've shutdown new |
|
* sends before getting here so by waiting for signaled |
|
* sends to complete we're ensured that there will be no |
|
* more tx processing. |
|
*/ |
|
wait_event(rds_ib_ring_empty_wait, |
|
rds_ib_ring_empty(&ic->i_recv_ring) && |
|
(atomic_read(&ic->i_signaled_sends) == 0) && |
|
(atomic_read(&ic->i_fastreg_inuse_count) == 0) && |
|
(atomic_read(&ic->i_fastreg_wrs) == RDS_IB_DEFAULT_FR_WR)); |
|
tasklet_kill(&ic->i_send_tasklet); |
|
tasklet_kill(&ic->i_recv_tasklet); |
|
|
|
atomic_set(&ic->i_cq_quiesce, 1); |
|
|
|
/* first destroy the ib state that generates callbacks */ |
|
if (ic->i_cm_id->qp) |
|
rdma_destroy_qp(ic->i_cm_id); |
|
if (ic->i_send_cq) { |
|
if (ic->rds_ibdev) |
|
ibdev_put_vector(ic->rds_ibdev, ic->i_scq_vector); |
|
ib_destroy_cq(ic->i_send_cq); |
|
} |
|
|
|
if (ic->i_recv_cq) { |
|
if (ic->rds_ibdev) |
|
ibdev_put_vector(ic->rds_ibdev, ic->i_rcq_vector); |
|
ib_destroy_cq(ic->i_recv_cq); |
|
} |
|
|
|
if (ic->rds_ibdev) { |
|
/* then free the resources that ib callbacks use */ |
|
if (ic->i_send_hdrs) { |
|
rds_dma_hdrs_free(ic->rds_ibdev, |
|
ic->i_send_hdrs, |
|
ic->i_send_hdrs_dma, |
|
ic->i_send_ring.w_nr, |
|
DMA_TO_DEVICE); |
|
ic->i_send_hdrs = NULL; |
|
ic->i_send_hdrs_dma = NULL; |
|
} |
|
|
|
if (ic->i_recv_hdrs) { |
|
rds_dma_hdrs_free(ic->rds_ibdev, |
|
ic->i_recv_hdrs, |
|
ic->i_recv_hdrs_dma, |
|
ic->i_recv_ring.w_nr, |
|
DMA_FROM_DEVICE); |
|
ic->i_recv_hdrs = NULL; |
|
ic->i_recv_hdrs_dma = NULL; |
|
} |
|
|
|
if (ic->i_ack) { |
|
rds_dma_hdr_free(ic->rds_ibdev->dev, ic->i_ack, |
|
ic->i_ack_dma, DMA_TO_DEVICE); |
|
ic->i_ack = NULL; |
|
} |
|
} else { |
|
WARN_ON(ic->i_send_hdrs); |
|
WARN_ON(ic->i_send_hdrs_dma); |
|
WARN_ON(ic->i_recv_hdrs); |
|
WARN_ON(ic->i_recv_hdrs_dma); |
|
WARN_ON(ic->i_ack); |
|
} |
|
|
|
if (ic->i_sends) |
|
rds_ib_send_clear_ring(ic); |
|
if (ic->i_recvs) |
|
rds_ib_recv_clear_ring(ic); |
|
|
|
rdma_destroy_id(ic->i_cm_id); |
|
|
|
/* |
|
* Move connection back to the nodev list. |
|
*/ |
|
if (ic->rds_ibdev) |
|
rds_ib_remove_conn(ic->rds_ibdev, conn); |
|
|
|
ic->i_cm_id = NULL; |
|
ic->i_pd = NULL; |
|
ic->i_send_cq = NULL; |
|
ic->i_recv_cq = NULL; |
|
} |
|
BUG_ON(ic->rds_ibdev); |
|
|
|
/* Clear pending transmit */ |
|
if (ic->i_data_op) { |
|
struct rds_message *rm; |
|
|
|
rm = container_of(ic->i_data_op, struct rds_message, data); |
|
rds_message_put(rm); |
|
ic->i_data_op = NULL; |
|
} |
|
|
|
/* Clear the ACK state */ |
|
clear_bit(IB_ACK_IN_FLIGHT, &ic->i_ack_flags); |
|
#ifdef KERNEL_HAS_ATOMIC64 |
|
atomic64_set(&ic->i_ack_next, 0); |
|
#else |
|
ic->i_ack_next = 0; |
|
#endif |
|
ic->i_ack_recv = 0; |
|
|
|
/* Clear flow control state */ |
|
ic->i_flowctl = 0; |
|
atomic_set(&ic->i_credits, 0); |
|
|
|
/* Re-init rings, but retain sizes. */ |
|
rds_ib_ring_init(&ic->i_send_ring, ic->i_send_ring.w_nr); |
|
rds_ib_ring_init(&ic->i_recv_ring, ic->i_recv_ring.w_nr); |
|
|
|
if (ic->i_ibinc) { |
|
rds_inc_put(&ic->i_ibinc->ii_inc); |
|
ic->i_ibinc = NULL; |
|
} |
|
|
|
vfree(ic->i_sends); |
|
ic->i_sends = NULL; |
|
vfree(ic->i_recvs); |
|
ic->i_recvs = NULL; |
|
ic->i_active_side = false; |
|
} |
|
|
|
int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp) |
|
{ |
|
struct rds_ib_connection *ic; |
|
unsigned long flags; |
|
int ret; |
|
|
|
/* XXX too lazy? */ |
|
ic = kzalloc(sizeof(struct rds_ib_connection), gfp); |
|
if (!ic) |
|
return -ENOMEM; |
|
|
|
ret = rds_ib_recv_alloc_caches(ic, gfp); |
|
if (ret) { |
|
kfree(ic); |
|
return ret; |
|
} |
|
|
|
INIT_LIST_HEAD(&ic->ib_node); |
|
tasklet_init(&ic->i_send_tasklet, rds_ib_tasklet_fn_send, |
|
(unsigned long)ic); |
|
tasklet_init(&ic->i_recv_tasklet, rds_ib_tasklet_fn_recv, |
|
(unsigned long)ic); |
|
mutex_init(&ic->i_recv_mutex); |
|
#ifndef KERNEL_HAS_ATOMIC64 |
|
spin_lock_init(&ic->i_ack_lock); |
|
#endif |
|
atomic_set(&ic->i_signaled_sends, 0); |
|
atomic_set(&ic->i_fastreg_wrs, RDS_IB_DEFAULT_FR_WR); |
|
|
|
/* |
|
* rds_ib_conn_shutdown() waits for these to be emptied so they |
|
* must be initialized before it can be called. |
|
*/ |
|
rds_ib_ring_init(&ic->i_send_ring, 0); |
|
rds_ib_ring_init(&ic->i_recv_ring, 0); |
|
|
|
ic->conn = conn; |
|
conn->c_transport_data = ic; |
|
|
|
spin_lock_irqsave(&ib_nodev_conns_lock, flags); |
|
list_add_tail(&ic->ib_node, &ib_nodev_conns); |
|
spin_unlock_irqrestore(&ib_nodev_conns_lock, flags); |
|
|
|
|
|
rdsdebug("conn %p conn ic %p\n", conn, conn->c_transport_data); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Free a connection. Connection must be shut down and not set for reconnect. |
|
*/ |
|
void rds_ib_conn_free(void *arg) |
|
{ |
|
struct rds_ib_connection *ic = arg; |
|
spinlock_t *lock_ptr; |
|
|
|
rdsdebug("ic %p\n", ic); |
|
|
|
/* |
|
* Conn is either on a dev's list or on the nodev list. |
|
* A race with shutdown() or connect() would cause problems |
|
* (since rds_ibdev would change) but that should never happen. |
|
*/ |
|
lock_ptr = ic->rds_ibdev ? &ic->rds_ibdev->spinlock : &ib_nodev_conns_lock; |
|
|
|
spin_lock_irq(lock_ptr); |
|
list_del(&ic->ib_node); |
|
spin_unlock_irq(lock_ptr); |
|
|
|
rds_ib_recv_free_caches(ic); |
|
|
|
kfree(ic); |
|
} |
|
|
|
|
|
/* |
|
* An error occurred on the connection |
|
*/ |
|
void |
|
__rds_ib_conn_error(struct rds_connection *conn, const char *fmt, ...) |
|
{ |
|
va_list ap; |
|
|
|
rds_conn_drop(conn); |
|
|
|
va_start(ap, fmt); |
|
vprintk(fmt, ap); |
|
va_end(ap); |
|
}
|
|
|