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![David S. Miller](/assets/img/avatar_default.png)
Conflicts: drivers/net/stmmac/stmmac_main.c drivers/net/wireless/wl12xx/wl1271_cmd.c drivers/net/wireless/wl12xx/wl1271_main.c drivers/net/wireless/wl12xx/wl1271_spi.c net/core/ethtool.c net/mac80211/scan.c
765 lines
21 KiB
C
765 lines
21 KiB
C
/*
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* Copyright (c) 2006 Oracle. 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 "rds.h"
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#include "iw.h"
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/*
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* Set the selected protocol version
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*/
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static void rds_iw_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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* Set up flow control
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*/
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static void rds_iw_set_flow_control(struct rds_connection *conn, u32 credits)
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{
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struct rds_iw_connection *ic = conn->c_transport_data;
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if (rds_iw_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_iw_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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* 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_iw_cm_connect_complete(struct rds_connection *conn, struct rdma_cm_event *event)
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{
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const struct rds_iw_connect_private *dp = NULL;
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struct rds_iw_connection *ic = conn->c_transport_data;
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struct rds_iw_device *rds_iwdev;
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int err;
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if (event->param.conn.private_data_len) {
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dp = event->param.conn.private_data;
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rds_iw_set_protocol(conn,
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RDS_PROTOCOL(dp->dp_protocol_major,
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dp->dp_protocol_minor));
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rds_iw_set_flow_control(conn, be32_to_cpu(dp->dp_credit));
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}
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/* update ib_device with this local ipaddr & conn */
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rds_iwdev = ib_get_client_data(ic->i_cm_id->device, &rds_iw_client);
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err = rds_iw_update_cm_id(rds_iwdev, ic->i_cm_id);
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if (err)
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printk(KERN_ERR "rds_iw_update_ipaddr failed (%d)\n", err);
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rds_iw_add_conn(rds_iwdev, conn);
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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 && dp->dp_ack_seq)
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rds_send_drop_acked(conn, be64_to_cpu(dp->dp_ack_seq), NULL);
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printk(KERN_NOTICE "RDS/IW: connected to %pI4<->%pI4 version %u.%u%s\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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ic->i_flowctl ? ", flow control" : "");
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rds_connect_complete(conn);
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}
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static void rds_iw_cm_fill_conn_param(struct rds_connection *conn,
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struct rdma_conn_param *conn_param,
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struct rds_iw_connect_private *dp,
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u32 protocol_version)
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{
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struct rds_iw_connection *ic = conn->c_transport_data;
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memset(conn_param, 0, sizeof(struct rdma_conn_param));
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/* XXX tune these? */
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conn_param->responder_resources = 1;
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conn_param->initiator_depth = 1;
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if (dp) {
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memset(dp, 0, sizeof(*dp));
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dp->dp_saddr = conn->c_laddr;
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dp->dp_daddr = conn->c_faddr;
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dp->dp_protocol_major = RDS_PROTOCOL_MAJOR(protocol_version);
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dp->dp_protocol_minor = RDS_PROTOCOL_MINOR(protocol_version);
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dp->dp_protocol_minor_mask = cpu_to_be16(RDS_IW_SUPPORTED_PROTOCOLS);
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dp->dp_ack_seq = rds_iw_piggyb_ack(ic);
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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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credits = IB_GET_POST_CREDITS(atomic_read(&ic->i_credits));
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dp->dp_credit = cpu_to_be32(credits);
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atomic_sub(IB_SET_POST_CREDITS(credits), &ic->i_credits);
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}
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conn_param->private_data = dp;
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conn_param->private_data_len = sizeof(*dp);
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}
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}
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static void rds_iw_cq_event_handler(struct ib_event *event, void *data)
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{
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rdsdebug("event %u data %p\n", event->event, data);
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}
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static void rds_iw_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_iw_connection *ic = conn->c_transport_data;
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rdsdebug("conn %p ic %p event %u\n", conn, ic, 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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case IB_EVENT_QP_REQ_ERR:
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case IB_EVENT_QP_FATAL:
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default:
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rdsdebug("Fatal QP Event %u "
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"- connection %pI4->%pI4, reconnecting\n",
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event->event, &conn->c_laddr,
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&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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* Create a QP
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*/
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static int rds_iw_init_qp_attrs(struct ib_qp_init_attr *attr,
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struct rds_iw_device *rds_iwdev,
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struct rds_iw_work_ring *send_ring,
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void (*send_cq_handler)(struct ib_cq *, void *),
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struct rds_iw_work_ring *recv_ring,
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void (*recv_cq_handler)(struct ib_cq *, void *),
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void *context)
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{
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struct ib_device *dev = rds_iwdev->dev;
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unsigned int send_size, recv_size;
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int ret;
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/* The offset of 1 is to accomodate the additional ACK WR. */
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send_size = min_t(unsigned int, rds_iwdev->max_wrs, rds_iw_sysctl_max_send_wr + 1);
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recv_size = min_t(unsigned int, rds_iwdev->max_wrs, rds_iw_sysctl_max_recv_wr + 1);
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rds_iw_ring_resize(send_ring, send_size - 1);
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rds_iw_ring_resize(recv_ring, recv_size - 1);
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memset(attr, 0, sizeof(*attr));
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attr->event_handler = rds_iw_qp_event_handler;
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attr->qp_context = context;
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attr->cap.max_send_wr = send_size;
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attr->cap.max_recv_wr = recv_size;
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attr->cap.max_send_sge = rds_iwdev->max_sge;
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attr->cap.max_recv_sge = RDS_IW_RECV_SGE;
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attr->sq_sig_type = IB_SIGNAL_REQ_WR;
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attr->qp_type = IB_QPT_RC;
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attr->send_cq = ib_create_cq(dev, send_cq_handler,
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rds_iw_cq_event_handler,
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context, send_size, 0);
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if (IS_ERR(attr->send_cq)) {
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ret = PTR_ERR(attr->send_cq);
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attr->send_cq = NULL;
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rdsdebug("ib_create_cq send failed: %d\n", ret);
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goto out;
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}
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attr->recv_cq = ib_create_cq(dev, recv_cq_handler,
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rds_iw_cq_event_handler,
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context, recv_size, 0);
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if (IS_ERR(attr->recv_cq)) {
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ret = PTR_ERR(attr->recv_cq);
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attr->recv_cq = NULL;
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rdsdebug("ib_create_cq send failed: %d\n", ret);
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goto out;
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}
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ret = ib_req_notify_cq(attr->send_cq, IB_CQ_NEXT_COMP);
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if (ret) {
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rdsdebug("ib_req_notify_cq send failed: %d\n", ret);
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goto out;
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}
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ret = ib_req_notify_cq(attr->recv_cq, IB_CQ_SOLICITED);
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if (ret) {
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rdsdebug("ib_req_notify_cq recv failed: %d\n", ret);
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goto out;
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}
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out:
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if (ret) {
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if (attr->send_cq)
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ib_destroy_cq(attr->send_cq);
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if (attr->recv_cq)
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ib_destroy_cq(attr->recv_cq);
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}
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return ret;
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}
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/*
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* This needs to be very careful to not leave IS_ERR pointers around for
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* cleanup to trip over.
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*/
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static int rds_iw_setup_qp(struct rds_connection *conn)
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{
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struct rds_iw_connection *ic = conn->c_transport_data;
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struct ib_device *dev = ic->i_cm_id->device;
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struct ib_qp_init_attr attr;
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struct rds_iw_device *rds_iwdev;
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int ret;
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/* rds_iw_add_one creates a rds_iw_device object per IB device,
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* and allocates a protection domain, memory range and MR pool
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* for each. If that fails for any reason, it will not register
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* the rds_iwdev at all.
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*/
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rds_iwdev = ib_get_client_data(dev, &rds_iw_client);
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if (rds_iwdev == NULL) {
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if (printk_ratelimit())
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printk(KERN_NOTICE "RDS/IW: No client_data for device %s\n",
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dev->name);
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return -EOPNOTSUPP;
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}
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/* Protection domain and memory range */
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ic->i_pd = rds_iwdev->pd;
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ic->i_mr = rds_iwdev->mr;
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ret = rds_iw_init_qp_attrs(&attr, rds_iwdev,
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&ic->i_send_ring, rds_iw_send_cq_comp_handler,
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&ic->i_recv_ring, rds_iw_recv_cq_comp_handler,
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conn);
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if (ret < 0)
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goto out;
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ic->i_send_cq = attr.send_cq;
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ic->i_recv_cq = attr.recv_cq;
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/*
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* XXX this can fail if max_*_wr is too large? Are we supposed
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* to back off until we get a value that the hardware can support?
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*/
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ret = rdma_create_qp(ic->i_cm_id, ic->i_pd, &attr);
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if (ret) {
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rdsdebug("rdma_create_qp failed: %d\n", ret);
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goto out;
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}
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ic->i_send_hdrs = ib_dma_alloc_coherent(dev,
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ic->i_send_ring.w_nr *
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sizeof(struct rds_header),
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&ic->i_send_hdrs_dma, GFP_KERNEL);
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if (ic->i_send_hdrs == NULL) {
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ret = -ENOMEM;
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rdsdebug("ib_dma_alloc_coherent send failed\n");
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goto out;
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}
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ic->i_recv_hdrs = ib_dma_alloc_coherent(dev,
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ic->i_recv_ring.w_nr *
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sizeof(struct rds_header),
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&ic->i_recv_hdrs_dma, GFP_KERNEL);
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if (ic->i_recv_hdrs == NULL) {
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ret = -ENOMEM;
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rdsdebug("ib_dma_alloc_coherent recv failed\n");
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goto out;
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}
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ic->i_ack = ib_dma_alloc_coherent(dev, sizeof(struct rds_header),
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&ic->i_ack_dma, GFP_KERNEL);
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if (ic->i_ack == NULL) {
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ret = -ENOMEM;
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rdsdebug("ib_dma_alloc_coherent ack failed\n");
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goto out;
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}
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ic->i_sends = vmalloc(ic->i_send_ring.w_nr * sizeof(struct rds_iw_send_work));
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if (ic->i_sends == NULL) {
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ret = -ENOMEM;
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rdsdebug("send allocation failed\n");
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goto out;
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}
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rds_iw_send_init_ring(ic);
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ic->i_recvs = vmalloc(ic->i_recv_ring.w_nr * sizeof(struct rds_iw_recv_work));
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if (ic->i_recvs == NULL) {
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ret = -ENOMEM;
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rdsdebug("recv allocation failed\n");
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goto out;
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}
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rds_iw_recv_init_ring(ic);
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rds_iw_recv_init_ack(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_iw_recv_refill(conn, GFP_KERNEL, GFP_HIGHUSER, 1);
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rdsdebug("conn %p pd %p mr %p cq %p %p\n", conn, ic->i_pd, ic->i_mr,
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ic->i_send_cq, ic->i_recv_cq);
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out:
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return ret;
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}
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static u32 rds_iw_protocol_compatible(const struct rds_iw_connect_private *dp)
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{
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u16 common;
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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
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* original size. The only way to tell the difference is by looking at
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* the contents, which are initialized to zero.
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* If the protocol version fields aren't set, this is a connection attempt
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* 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 :-( */
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if (dp->dp_protocol_major == 0)
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return RDS_PROTOCOL_3_0;
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common = be16_to_cpu(dp->dp_protocol_minor_mask) & RDS_IW_SUPPORTED_PROTOCOLS;
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if (dp->dp_protocol_major == 3 && common) {
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version = RDS_PROTOCOL_3_0;
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while ((common >>= 1) != 0)
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version++;
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} else if (printk_ratelimit()) {
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printk(KERN_NOTICE "RDS: Connection from %pI4 using "
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"incompatible protocol version %u.%u\n",
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&dp->dp_saddr,
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dp->dp_protocol_major,
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dp->dp_protocol_minor);
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}
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return version;
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}
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int rds_iw_cm_handle_connect(struct rdma_cm_id *cm_id,
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struct rdma_cm_event *event)
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{
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const struct rds_iw_connect_private *dp = event->param.conn.private_data;
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struct rds_iw_connect_private dp_rep;
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struct rds_connection *conn = NULL;
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struct rds_iw_connection *ic = NULL;
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struct rdma_conn_param conn_param;
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struct rds_iw_device *rds_iwdev;
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u32 version;
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int err, destroy = 1;
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/* Check whether the remote protocol version matches ours. */
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version = rds_iw_protocol_compatible(dp);
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if (!version)
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goto out;
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rdsdebug("saddr %pI4 daddr %pI4 RDSv%u.%u\n",
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&dp->dp_saddr, &dp->dp_daddr,
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RDS_PROTOCOL_MAJOR(version), RDS_PROTOCOL_MINOR(version));
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conn = rds_conn_create(dp->dp_daddr, dp->dp_saddr, &rds_iw_transport,
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GFP_KERNEL);
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if (IS_ERR(conn)) {
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rdsdebug("rds_conn_create failed (%ld)\n", PTR_ERR(conn));
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conn = NULL;
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goto out;
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}
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/*
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* The connection request may occur while the
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* previous connection exist, e.g. in case of failover.
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* But as connections may be initiated simultaneously
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* by both hosts, we have a random backoff mechanism -
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* see the comment above rds_queue_reconnect()
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*/
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mutex_lock(&conn->c_cm_lock);
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if (!rds_conn_transition(conn, RDS_CONN_DOWN, RDS_CONN_CONNECTING)) {
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if (rds_conn_state(conn) == RDS_CONN_UP) {
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rdsdebug("incoming connect while connecting\n");
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rds_conn_drop(conn);
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rds_iw_stats_inc(s_iw_listen_closed_stale);
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} else
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if (rds_conn_state(conn) == RDS_CONN_CONNECTING) {
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/* Wait and see - our connect may still be succeeding */
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rds_iw_stats_inc(s_iw_connect_raced);
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}
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mutex_unlock(&conn->c_cm_lock);
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goto out;
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}
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ic = conn->c_transport_data;
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rds_iw_set_protocol(conn, version);
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rds_iw_set_flow_control(conn, be32_to_cpu(dp->dp_credit));
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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->dp_ack_seq)
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rds_send_drop_acked(conn, be64_to_cpu(dp->dp_ack_seq), NULL);
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BUG_ON(cm_id->context);
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BUG_ON(ic->i_cm_id);
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ic->i_cm_id = cm_id;
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cm_id->context = conn;
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rds_iwdev = ib_get_client_data(cm_id->device, &rds_iw_client);
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ic->i_dma_local_lkey = rds_iwdev->dma_local_lkey;
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/* We got halfway through setting up the ib_connection, if we
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* fail now, we have to take the long route out of this mess. */
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destroy = 0;
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|
|
err = rds_iw_setup_qp(conn);
|
|
if (err) {
|
|
rds_iw_conn_error(conn, "rds_iw_setup_qp failed (%d)\n", err);
|
|
goto out;
|
|
}
|
|
|
|
rds_iw_cm_fill_conn_param(conn, &conn_param, &dp_rep, version);
|
|
|
|
/* rdma_accept() calls rdma_reject() internally if it fails */
|
|
err = rdma_accept(cm_id, &conn_param);
|
|
mutex_unlock(&conn->c_cm_lock);
|
|
if (err) {
|
|
rds_iw_conn_error(conn, "rdma_accept failed (%d)\n", err);
|
|
goto out;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out:
|
|
rdma_reject(cm_id, NULL, 0);
|
|
return destroy;
|
|
}
|
|
|
|
|
|
int rds_iw_cm_initiate_connect(struct rdma_cm_id *cm_id)
|
|
{
|
|
struct rds_connection *conn = cm_id->context;
|
|
struct rds_iw_connection *ic = conn->c_transport_data;
|
|
struct rdma_conn_param conn_param;
|
|
struct rds_iw_connect_private dp;
|
|
int ret;
|
|
|
|
/* If the peer doesn't do protocol negotiation, we must
|
|
* default to RDSv3.0 */
|
|
rds_iw_set_protocol(conn, RDS_PROTOCOL_3_0);
|
|
ic->i_flowctl = rds_iw_sysctl_flow_control; /* advertise flow control */
|
|
|
|
ret = rds_iw_setup_qp(conn);
|
|
if (ret) {
|
|
rds_iw_conn_error(conn, "rds_iw_setup_qp failed (%d)\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
rds_iw_cm_fill_conn_param(conn, &conn_param, &dp, RDS_PROTOCOL_VERSION);
|
|
|
|
ret = rdma_connect(cm_id, &conn_param);
|
|
if (ret)
|
|
rds_iw_conn_error(conn, "rdma_connect 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) {
|
|
struct rds_iw_connection *ic = conn->c_transport_data;
|
|
|
|
if (ic->i_cm_id == cm_id)
|
|
ret = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int rds_iw_conn_connect(struct rds_connection *conn)
|
|
{
|
|
struct rds_iw_connection *ic = conn->c_transport_data;
|
|
struct rds_iw_device *rds_iwdev;
|
|
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,
|
|
RDMA_PS_TCP);
|
|
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);
|
|
|
|
src.sin_family = AF_INET;
|
|
src.sin_addr.s_addr = (__force u32)conn->c_laddr;
|
|
src.sin_port = (__force u16)htons(0);
|
|
|
|
/* First, bind to the local address and device. */
|
|
ret = rdma_bind_addr(ic->i_cm_id, (struct sockaddr *) &src);
|
|
if (ret) {
|
|
rdsdebug("rdma_bind_addr(%pI4) failed: %d\n",
|
|
&conn->c_laddr, ret);
|
|
rdma_destroy_id(ic->i_cm_id);
|
|
ic->i_cm_id = NULL;
|
|
goto out;
|
|
}
|
|
|
|
rds_iwdev = ib_get_client_data(ic->i_cm_id->device, &rds_iw_client);
|
|
ic->i_dma_local_lkey = rds_iwdev->dma_local_lkey;
|
|
|
|
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\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_iw_conn_shutdown(struct rds_connection *conn)
|
|
{
|
|
struct rds_iw_connection *ic = conn->c_transport_data;
|
|
int err = 0;
|
|
struct ib_qp_attr qp_attr;
|
|
|
|
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) {
|
|
struct ib_device *dev = ic->i_cm_id->device;
|
|
|
|
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("rds_iw_conn_shutdown: failed to disconnect,"
|
|
" cm: %p err %d\n", ic->i_cm_id, err);
|
|
}
|
|
|
|
if (ic->i_cm_id->qp) {
|
|
qp_attr.qp_state = IB_QPS_ERR;
|
|
ib_modify_qp(ic->i_cm_id->qp, &qp_attr, IB_QP_STATE);
|
|
}
|
|
|
|
wait_event(rds_iw_ring_empty_wait,
|
|
rds_iw_ring_empty(&ic->i_send_ring) &&
|
|
rds_iw_ring_empty(&ic->i_recv_ring));
|
|
|
|
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_iw_send_clear_ring(ic);
|
|
if (ic->i_recvs)
|
|
rds_iw_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);
|
|
|
|
/*
|
|
* If associated with an rds_iw_device:
|
|
* Move connection back to the nodev list.
|
|
* Remove cm_id from the device cm_id list.
|
|
*/
|
|
if (ic->rds_iwdev)
|
|
rds_iw_remove_conn(ic->rds_iwdev, conn);
|
|
|
|
rdma_destroy_id(ic->i_cm_id);
|
|
|
|
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_iwdev);
|
|
|
|
/* Clear pending transmit */
|
|
if (ic->i_rm) {
|
|
rds_message_put(ic->i_rm);
|
|
ic->i_rm = 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);
|
|
|
|
rds_iw_ring_init(&ic->i_send_ring, rds_iw_sysctl_max_send_wr);
|
|
rds_iw_ring_init(&ic->i_recv_ring, rds_iw_sysctl_max_recv_wr);
|
|
|
|
if (ic->i_iwinc) {
|
|
rds_inc_put(&ic->i_iwinc->ii_inc);
|
|
ic->i_iwinc = NULL;
|
|
}
|
|
|
|
vfree(ic->i_sends);
|
|
ic->i_sends = NULL;
|
|
vfree(ic->i_recvs);
|
|
ic->i_recvs = NULL;
|
|
rdsdebug("shutdown complete\n");
|
|
}
|
|
|
|
int rds_iw_conn_alloc(struct rds_connection *conn, gfp_t gfp)
|
|
{
|
|
struct rds_iw_connection *ic;
|
|
unsigned long flags;
|
|
|
|
/* XXX too lazy? */
|
|
ic = kzalloc(sizeof(struct rds_iw_connection), GFP_KERNEL);
|
|
if (ic == NULL)
|
|
return -ENOMEM;
|
|
|
|
INIT_LIST_HEAD(&ic->iw_node);
|
|
tasklet_init(&ic->i_recv_tasklet, rds_iw_recv_tasklet_fn,
|
|
(unsigned long) ic);
|
|
mutex_init(&ic->i_recv_mutex);
|
|
#ifndef KERNEL_HAS_ATOMIC64
|
|
spin_lock_init(&ic->i_ack_lock);
|
|
#endif
|
|
|
|
/*
|
|
* rds_iw_conn_shutdown() waits for these to be emptied so they
|
|
* must be initialized before it can be called.
|
|
*/
|
|
rds_iw_ring_init(&ic->i_send_ring, rds_iw_sysctl_max_send_wr);
|
|
rds_iw_ring_init(&ic->i_recv_ring, rds_iw_sysctl_max_recv_wr);
|
|
|
|
ic->conn = conn;
|
|
conn->c_transport_data = ic;
|
|
|
|
spin_lock_irqsave(&iw_nodev_conns_lock, flags);
|
|
list_add_tail(&ic->iw_node, &iw_nodev_conns);
|
|
spin_unlock_irqrestore(&iw_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_iw_conn_free(void *arg)
|
|
{
|
|
struct rds_iw_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_iwdev would change) but that should never happen.
|
|
*/
|
|
lock_ptr = ic->rds_iwdev ? &ic->rds_iwdev->spinlock : &iw_nodev_conns_lock;
|
|
|
|
spin_lock_irq(lock_ptr);
|
|
list_del(&ic->iw_node);
|
|
spin_unlock_irq(lock_ptr);
|
|
|
|
kfree(ic);
|
|
}
|
|
|
|
/*
|
|
* An error occurred on the connection
|
|
*/
|
|
void
|
|
__rds_iw_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);
|
|
}
|