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net/rds/ib_cm.c
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/* * Copyright (c) 2006 Oracle. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * */ #include <linux/kernel.h> #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 "rds.h" #include "ib.h" |
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static char *rds_ib_event_type_strings[] = { |
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#define RDS_IB_EVENT_STRING(foo) \ [IB_EVENT_##foo] = __stringify(IB_EVENT_##foo) |
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RDS_IB_EVENT_STRING(CQ_ERR), RDS_IB_EVENT_STRING(QP_FATAL), RDS_IB_EVENT_STRING(QP_REQ_ERR), RDS_IB_EVENT_STRING(QP_ACCESS_ERR), RDS_IB_EVENT_STRING(COMM_EST), RDS_IB_EVENT_STRING(SQ_DRAINED), RDS_IB_EVENT_STRING(PATH_MIG), RDS_IB_EVENT_STRING(PATH_MIG_ERR), RDS_IB_EVENT_STRING(DEVICE_FATAL), RDS_IB_EVENT_STRING(PORT_ACTIVE), RDS_IB_EVENT_STRING(PORT_ERR), RDS_IB_EVENT_STRING(LID_CHANGE), RDS_IB_EVENT_STRING(PKEY_CHANGE), RDS_IB_EVENT_STRING(SM_CHANGE), RDS_IB_EVENT_STRING(SRQ_ERR), RDS_IB_EVENT_STRING(SRQ_LIMIT_REACHED), RDS_IB_EVENT_STRING(QP_LAST_WQE_REACHED), RDS_IB_EVENT_STRING(CLIENT_REREGISTER), #undef RDS_IB_EVENT_STRING }; static char *rds_ib_event_str(enum ib_event_type type) { |
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return rds_str_array(rds_ib_event_type_strings, ARRAY_SIZE(rds_ib_event_type_strings), type); |
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}; |
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/* * Set the selected protocol version */ static void rds_ib_set_protocol(struct rds_connection *conn, unsigned int version) { conn->c_version = version; } /* * Set up flow control */ static void rds_ib_set_flow_control(struct rds_connection *conn, u32 credits) { struct rds_ib_connection *ic = conn->c_transport_data; if (rds_ib_sysctl_flow_control && credits != 0) { /* We're doing flow control */ ic->i_flowctl = 1; rds_ib_send_add_credits(conn, credits); } else { ic->i_flowctl = 0; } } /* * Tune RNR behavior. Without flow control, we use a rather * low timeout, but not the absolute minimum - this should * be tunable. * * We already set the RNR retry count to 7 (which is the * smallest infinite number :-) above. * If flow control is off, we want to change this back to 0 * so that we learn quickly when our credit accounting is * buggy. * * Caller passes in a qp_attr pointer - don't waste stack spacv * by allocation this twice. */ static void rds_ib_tune_rnr(struct rds_ib_connection *ic, struct ib_qp_attr *attr) { int ret; attr->min_rnr_timer = IB_RNR_TIMER_000_32; ret = ib_modify_qp(ic->i_cm_id->qp, attr, IB_QP_MIN_RNR_TIMER); if (ret) printk(KERN_NOTICE "ib_modify_qp(IB_QP_MIN_RNR_TIMER): err=%d ", -ret); } /* * Connection established. * We get here for both outgoing and incoming connection. */ void rds_ib_cm_connect_complete(struct rds_connection *conn, struct rdma_cm_event *event) { const struct rds_ib_connect_private *dp = NULL; struct rds_ib_connection *ic = conn->c_transport_data; |
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struct ib_qp_attr qp_attr; int err; |
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if (event->param.conn.private_data_len >= sizeof(*dp)) { |
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dp = event->param.conn.private_data; |
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/* make sure it isn't empty data */ if (dp->dp_protocol_major) { rds_ib_set_protocol(conn, |
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RDS_PROTOCOL(dp->dp_protocol_major, |
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dp->dp_protocol_minor)); rds_ib_set_flow_control(conn, be32_to_cpu(dp->dp_credit)); } |
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} |
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if (conn->c_version < RDS_PROTOCOL(3,1)) { printk(KERN_NOTICE "RDS/IB: Connection to %pI4 version %u.%u failed," " no longer supported ", &conn->c_faddr, RDS_PROTOCOL_MAJOR(conn->c_version), RDS_PROTOCOL_MINOR(conn->c_version)); rds_conn_destroy(conn); return; } else { printk(KERN_NOTICE "RDS/IB: connected to %pI4 version %u.%u%s ", &conn->c_faddr, RDS_PROTOCOL_MAJOR(conn->c_version), RDS_PROTOCOL_MINOR(conn->c_version), ic->i_flowctl ? ", flow control" : ""); } |
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|
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/* * Init rings and fill recv. this needs to wait until protocol negotiation * is complete, since ring layout is different from 3.0 to 3.1. */ rds_ib_send_init_ring(ic); rds_ib_recv_init_ring(ic); /* Post receive buffers - as a side effect, this will update * the posted credit count. */ |
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rds_ib_recv_refill(conn, 1); |
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|
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/* Tune RNR behavior */ rds_ib_tune_rnr(ic, &qp_attr); qp_attr.qp_state = IB_QPS_RTS; err = ib_modify_qp(ic->i_cm_id->qp, &qp_attr, IB_QP_STATE); if (err) printk(KERN_NOTICE "ib_modify_qp(IB_QP_STATE, RTS): err=%d ", err); |
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/* update ib_device with this local ipaddr */ 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) ", err); |
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/* If the peer gave us the last packet it saw, process this as if * we had received a regular ACK. */ if (dp && dp->dp_ack_seq) rds_send_drop_acked(conn, be64_to_cpu(dp->dp_ack_seq), NULL); rds_connect_complete(conn); } static void rds_ib_cm_fill_conn_param(struct rds_connection *conn, struct rdma_conn_param *conn_param, struct rds_ib_connect_private *dp, |
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u32 protocol_version, u32 max_responder_resources, u32 max_initiator_depth) |
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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 = min_t(u32, rds_ibdev->max_responder_resources, max_responder_resources); conn_param->initiator_depth = 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; if (dp) { |
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memset(dp, 0, sizeof(*dp)); dp->dp_saddr = conn->c_laddr; dp->dp_daddr = conn->c_faddr; dp->dp_protocol_major = RDS_PROTOCOL_MAJOR(protocol_version); dp->dp_protocol_minor = RDS_PROTOCOL_MINOR(protocol_version); dp->dp_protocol_minor_mask = cpu_to_be16(RDS_IB_SUPPORTED_PROTOCOLS); dp->dp_ack_seq = rds_ib_piggyb_ack(ic); /* Advertise flow control */ if (ic->i_flowctl) { unsigned int credits; credits = IB_GET_POST_CREDITS(atomic_read(&ic->i_credits)); dp->dp_credit = cpu_to_be32(credits); atomic_sub(IB_SET_POST_CREDITS(credits), &ic->i_credits); } conn_param->private_data = dp; conn_param->private_data_len = sizeof(*dp); } } static void rds_ib_cq_event_handler(struct ib_event *event, void *data) { |
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rdsdebug("event %u (%s) data %p ", event->event, rds_ib_event_str(event->event), data); |
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} static void rds_ib_qp_event_handler(struct ib_event *event, void *data) { struct rds_connection *conn = data; struct rds_ib_connection *ic = conn->c_transport_data; |
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rdsdebug("conn %p ic %p event %u (%s) ", conn, ic, event->event, rds_ib_event_str(event->event)); |
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switch (event->event) { case IB_EVENT_COMM_EST: rdma_notify(ic->i_cm_id, IB_EVENT_COMM_EST); break; default: |
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rdsdebug("Fatal QP Event %u (%s) " |
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"- connection %pI4->%pI4, reconnecting ", |
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event->event, rds_ib_event_str(event->event), &conn->c_laddr, &conn->c_faddr); |
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rds_conn_drop(conn); |
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break; } } /* * 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 rds_ib_device *rds_ibdev; int ret; |
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/* * It's normal to see a null device if an incoming connection races * with device removal, so we don't print a warning. |
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*/ |
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rds_ibdev = rds_ib_get_client_data(dev); if (!rds_ibdev) |
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return -EOPNOTSUPP; |
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/* add the conn now so that connection establishment has the dev */ rds_ib_add_conn(rds_ibdev, conn); |
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if (rds_ibdev->max_wrs < ic->i_send_ring.w_nr + 1) rds_ib_ring_resize(&ic->i_send_ring, rds_ibdev->max_wrs - 1); if (rds_ibdev->max_wrs < ic->i_recv_ring.w_nr + 1) rds_ib_ring_resize(&ic->i_recv_ring, rds_ibdev->max_wrs - 1); /* Protection domain and memory range */ ic->i_pd = rds_ibdev->pd; ic->i_mr = rds_ibdev->mr; ic->i_send_cq = ib_create_cq(dev, rds_ib_send_cq_comp_handler, rds_ib_cq_event_handler, conn, ic->i_send_ring.w_nr + 1, 0); if (IS_ERR(ic->i_send_cq)) { ret = PTR_ERR(ic->i_send_cq); ic->i_send_cq = NULL; rdsdebug("ib_create_cq send failed: %d ", ret); goto out; } ic->i_recv_cq = ib_create_cq(dev, rds_ib_recv_cq_comp_handler, rds_ib_cq_event_handler, conn, ic->i_recv_ring.w_nr, 0); if (IS_ERR(ic->i_recv_cq)) { ret = PTR_ERR(ic->i_recv_cq); ic->i_recv_cq = NULL; rdsdebug("ib_create_cq recv failed: %d ", ret); goto out; } ret = ib_req_notify_cq(ic->i_send_cq, IB_CQ_NEXT_COMP); if (ret) { rdsdebug("ib_req_notify_cq send failed: %d ", ret); goto out; } ret = ib_req_notify_cq(ic->i_recv_cq, IB_CQ_SOLICITED); if (ret) { rdsdebug("ib_req_notify_cq recv failed: %d ", ret); goto 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 + 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 ", ret); goto out; } ic->i_send_hdrs = ib_dma_alloc_coherent(dev, ic->i_send_ring.w_nr * sizeof(struct rds_header), &ic->i_send_hdrs_dma, GFP_KERNEL); |
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if (!ic->i_send_hdrs) { |
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ret = -ENOMEM; rdsdebug("ib_dma_alloc_coherent send failed "); goto out; } ic->i_recv_hdrs = ib_dma_alloc_coherent(dev, ic->i_recv_ring.w_nr * sizeof(struct rds_header), &ic->i_recv_hdrs_dma, GFP_KERNEL); |
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if (!ic->i_recv_hdrs) { |
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ret = -ENOMEM; rdsdebug("ib_dma_alloc_coherent recv failed "); goto out; } ic->i_ack = ib_dma_alloc_coherent(dev, sizeof(struct rds_header), &ic->i_ack_dma, GFP_KERNEL); |
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if (!ic->i_ack) { |
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ret = -ENOMEM; rdsdebug("ib_dma_alloc_coherent ack failed "); goto out; } |
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ic->i_sends = vzalloc_node(ic->i_send_ring.w_nr * sizeof(struct rds_ib_send_work), |
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ibdev_to_node(dev)); |
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if (!ic->i_sends) { |
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ret = -ENOMEM; rdsdebug("send allocation failed "); goto out; } |
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|
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ic->i_recvs = vzalloc_node(ic->i_recv_ring.w_nr * sizeof(struct rds_ib_recv_work), |
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ibdev_to_node(dev)); |
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if (!ic->i_recvs) { |
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ret = -ENOMEM; rdsdebug("recv allocation failed "); goto out; } |
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rds_ib_recv_init_ack(ic); |
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rdsdebug("conn %p pd %p mr %p cq %p %p ", conn, ic->i_pd, ic->i_mr, ic->i_send_cq, ic->i_recv_cq); out: |
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rds_ib_dev_put(rds_ibdev); |
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return ret; } |
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static u32 rds_ib_protocol_compatible(struct rdma_cm_event *event) |
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{ |
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const struct rds_ib_connect_private *dp = event->param.conn.private_data; |
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u16 common; u32 version = 0; |
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/* * rdma_cm private data is odd - when there is any private data in the |
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* 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 could be 3.0 or 2.0 - we can't tell. |
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* 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 "); return 0; } /* Even if len is crap *now* I still want to check it. -ASG */ |
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if (event->param.conn.private_data_len < sizeof (*dp) || dp->dp_protocol_major == 0) |
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return RDS_PROTOCOL_3_0; common = be16_to_cpu(dp->dp_protocol_minor_mask) & RDS_IB_SUPPORTED_PROTOCOLS; if (dp->dp_protocol_major == 3 && common) { version = RDS_PROTOCOL_3_0; while ((common >>= 1) != 0) version++; |
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} printk_ratelimited(KERN_NOTICE "RDS: Connection from %pI4 using " |
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"incompatible protocol version %u.%u ", &dp->dp_saddr, dp->dp_protocol_major, dp->dp_protocol_minor); |
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return version; } int rds_ib_cm_handle_connect(struct rdma_cm_id *cm_id, struct rdma_cm_event *event) { __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_connect_private *dp = event->param.conn.private_data; struct rds_ib_connect_private dp_rep; struct rds_connection *conn = NULL; struct rds_ib_connection *ic = NULL; struct rdma_conn_param conn_param; u32 version; |
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int err = 1, destroy = 1; |
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/* Check whether the remote protocol version matches ours. */ |
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version = rds_ib_protocol_compatible(event); |
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if (!version) goto out; rdsdebug("saddr %pI4 daddr %pI4 RDSv%u.%u lguid 0x%llx fguid " "0x%llx ", &dp->dp_saddr, &dp->dp_daddr, RDS_PROTOCOL_MAJOR(version), RDS_PROTOCOL_MINOR(version), (unsigned long long)be64_to_cpu(lguid), (unsigned long long)be64_to_cpu(fguid)); conn = rds_conn_create(dp->dp_daddr, dp->dp_saddr, &rds_ib_transport, GFP_KERNEL); if (IS_ERR(conn)) { rdsdebug("rds_conn_create failed (%ld) ", 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 "); 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); } |
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goto out; } ic = conn->c_transport_data; rds_ib_set_protocol(conn, version); rds_ib_set_flow_control(conn, be32_to_cpu(dp->dp_credit)); /* If the peer gave us the last packet it saw, process this as if * we had received a regular ACK. */ if (dp->dp_ack_seq) rds_send_drop_acked(conn, be64_to_cpu(dp->dp_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) ", err); goto out; } |
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rds_ib_cm_fill_conn_param(conn, &conn_param, &dp_rep, version, event->param.conn.responder_resources, event->param.conn.initiator_depth); |
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/* rdma_accept() calls rdma_reject() internally if it fails */ err = rdma_accept(cm_id, &conn_param); |
a46ca94e7 RDS/IB: rds_ib_cm... |
542 |
if (err) |
ec16227e1 RDS/IB: Infiniban... |
543 544 |
rds_ib_conn_error(conn, "rdma_accept failed (%d) ", err); |
ec16227e1 RDS/IB: Infiniban... |
545 546 |
out: |
a46ca94e7 RDS/IB: rds_ib_cm... |
547 548 549 550 |
if (conn) mutex_unlock(&conn->c_cm_lock); if (err) rdma_reject(cm_id, NULL, 0); |
ec16227e1 RDS/IB: Infiniban... |
551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 |
return destroy; } int rds_ib_cm_initiate_connect(struct rdma_cm_id *cm_id) { struct rds_connection *conn = cm_id->context; struct rds_ib_connection *ic = conn->c_transport_data; struct rdma_conn_param conn_param; struct rds_ib_connect_private dp; int ret; /* If the peer doesn't do protocol negotiation, we must * default to RDSv3.0 */ rds_ib_set_protocol(conn, RDS_PROTOCOL_3_0); 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) ", ret); goto out; } |
40589e74f RDS: Base init_de... |
574 575 |
rds_ib_cm_fill_conn_param(conn, &conn_param, &dp, RDS_PROTOCOL_VERSION, UINT_MAX, UINT_MAX); |
ec16227e1 RDS/IB: Infiniban... |
576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 |
ret = rdma_connect(cm_id, &conn_param); if (ret) rds_ib_conn_error(conn, "rdma_connect failed (%d) ", 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; } return ret; } int rds_ib_conn_connect(struct rds_connection *conn) { struct rds_ib_connection *ic = conn->c_transport_data; struct sockaddr_in src, dest; int ret; /* XXX I wonder what affect the port space has */ /* delegate cm event handler to rdma_transport */ ic->i_cm_id = rdma_create_id(rds_rdma_cm_event_handler, conn, |
b26f9b994 RDMA/cma: Pass QP... |
601 |
RDMA_PS_TCP, IB_QPT_RC); |
ec16227e1 RDS/IB: Infiniban... |
602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 |
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 ", ret); goto out; } rdsdebug("created cm id %p for conn %p ", ic->i_cm_id, conn); src.sin_family = AF_INET; src.sin_addr.s_addr = (__force u32)conn->c_laddr; src.sin_port = (__force u16)htons(0); dest.sin_family = AF_INET; dest.sin_addr.s_addr = (__force u32)conn->c_faddr; dest.sin_port = (__force u16)htons(RDS_PORT); 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 ", 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_shutdown(struct rds_connection *conn) { struct rds_ib_connection *ic = conn->c_transport_data; int err = 0; rdsdebug("cm %p pd %p cq %p %p qp %p ", 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) { struct ib_device *dev = ic->i_cm_id->device; rdsdebug("disconnecting cm %p ", 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 ", ic->i_cm_id, err); } |
e32b4a704 RDS/IB: Do not wa... |
665 |
/* |
f046011cd RDS/IB: track sig... |
666 667 668 669 670 671 672 |
* 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. |
e32b4a704 RDS/IB: Do not wa... |
673 |
*/ |
ec16227e1 RDS/IB: Infiniban... |
674 |
wait_event(rds_ib_ring_empty_wait, |
f046011cd RDS/IB: track sig... |
675 676 677 |
rds_ib_ring_empty(&ic->i_recv_ring) && (atomic_read(&ic->i_signaled_sends) == 0)); tasklet_kill(&ic->i_recv_tasklet); |
ec16227e1 RDS/IB: Infiniban... |
678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 |
if (ic->i_send_hdrs) ib_dma_free_coherent(dev, ic->i_send_ring.w_nr * sizeof(struct rds_header), ic->i_send_hdrs, ic->i_send_hdrs_dma); if (ic->i_recv_hdrs) ib_dma_free_coherent(dev, ic->i_recv_ring.w_nr * sizeof(struct rds_header), ic->i_recv_hdrs, ic->i_recv_hdrs_dma); if (ic->i_ack) ib_dma_free_coherent(dev, sizeof(struct rds_header), ic->i_ack, ic->i_ack_dma); if (ic->i_sends) rds_ib_send_clear_ring(ic); if (ic->i_recvs) rds_ib_recv_clear_ring(ic); if (ic->i_cm_id->qp) rdma_destroy_qp(ic->i_cm_id); if (ic->i_send_cq) ib_destroy_cq(ic->i_send_cq); if (ic->i_recv_cq) ib_destroy_cq(ic->i_recv_cq); rdma_destroy_id(ic->i_cm_id); /* * Move connection back to the nodev list. */ |
745cbccac RDS: Rewrite conn... |
713 714 |
if (ic->rds_ibdev) rds_ib_remove_conn(ic->rds_ibdev, conn); |
ec16227e1 RDS/IB: Infiniban... |
715 716 717 718 719 720 721 722 723 724 725 726 727 |
ic->i_cm_id = NULL; ic->i_pd = NULL; ic->i_mr = NULL; ic->i_send_cq = NULL; ic->i_recv_cq = NULL; ic->i_send_hdrs = NULL; ic->i_recv_hdrs = NULL; ic->i_ack = NULL; } BUG_ON(ic->rds_ibdev); /* Clear pending transmit */ |
ff3d7d361 RDS: Perform unma... |
728 729 730 731 732 733 |
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; |
ec16227e1 RDS/IB: Infiniban... |
734 735 736 737 |
} /* Clear the ACK state */ clear_bit(IB_ACK_IN_FLIGHT, &ic->i_ack_flags); |
8cbd9606a RDS: Use spinlock... |
738 739 740 741 742 |
#ifdef KERNEL_HAS_ATOMIC64 atomic64_set(&ic->i_ack_next, 0); #else ic->i_ack_next = 0; #endif |
ec16227e1 RDS/IB: Infiniban... |
743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 |
ic->i_ack_recv = 0; /* Clear flow control state */ ic->i_flowctl = 0; atomic_set(&ic->i_credits, 0); rds_ib_ring_init(&ic->i_send_ring, rds_ib_sysctl_max_send_wr); rds_ib_ring_init(&ic->i_recv_ring, rds_ib_sysctl_max_recv_wr); 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; } int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp) { struct rds_ib_connection *ic; unsigned long flags; |
332441258 RDS/IB: Add cachi... |
767 |
int ret; |
ec16227e1 RDS/IB: Infiniban... |
768 769 770 |
/* XXX too lazy? */ ic = kzalloc(sizeof(struct rds_ib_connection), GFP_KERNEL); |
8690bfa17 RDS: cleanup: rem... |
771 |
if (!ic) |
ec16227e1 RDS/IB: Infiniban... |
772 |
return -ENOMEM; |
332441258 RDS/IB: Add cachi... |
773 774 775 776 777 |
ret = rds_ib_recv_alloc_caches(ic); if (ret) { kfree(ic); return ret; } |
ec16227e1 RDS/IB: Infiniban... |
778 |
INIT_LIST_HEAD(&ic->ib_node); |
d521b63b2 RDS/IB+IW: Move r... |
779 780 |
tasklet_init(&ic->i_recv_tasklet, rds_ib_recv_tasklet_fn, (unsigned long) ic); |
ec16227e1 RDS/IB: Infiniban... |
781 |
mutex_init(&ic->i_recv_mutex); |
8cbd9606a RDS: Use spinlock... |
782 783 784 |
#ifndef KERNEL_HAS_ATOMIC64 spin_lock_init(&ic->i_ack_lock); #endif |
f046011cd RDS/IB: track sig... |
785 |
atomic_set(&ic->i_signaled_sends, 0); |
ec16227e1 RDS/IB: Infiniban... |
786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 |
/* * 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, rds_ib_sysctl_max_send_wr); rds_ib_ring_init(&ic->i_recv_ring, rds_ib_sysctl_max_recv_wr); 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 ", conn, conn->c_transport_data); return 0; } |
745cbccac RDS: Rewrite conn... |
806 807 808 |
/* * Free a connection. Connection must be shut down and not set for reconnect. */ |
ec16227e1 RDS/IB: Infiniban... |
809 810 811 |
void rds_ib_conn_free(void *arg) { struct rds_ib_connection *ic = arg; |
745cbccac RDS: Rewrite conn... |
812 |
spinlock_t *lock_ptr; |
ec16227e1 RDS/IB: Infiniban... |
813 814 |
rdsdebug("ic %p ", ic); |
745cbccac RDS: Rewrite conn... |
815 816 817 818 819 820 821 822 823 |
/* * 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); |
ec16227e1 RDS/IB: Infiniban... |
824 |
list_del(&ic->ib_node); |
745cbccac RDS: Rewrite conn... |
825 |
spin_unlock_irq(lock_ptr); |
332441258 RDS/IB: Add cachi... |
826 |
rds_ib_recv_free_caches(ic); |
ec16227e1 RDS/IB: Infiniban... |
827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 |
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); } |