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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b39ffa1df5
In order to support multiple GID types, we need to store the gid_type with each GID. This is also aligned with the RoCE v2 annex "RoCEv2 PORT GID table entries shall have a "GID type" attribute that denotes the L3 Address type". The currently supported GID is IB_GID_TYPE_IB which is also RoCE v1 GID type. This implies that gid_type should be added to roce_gid_table meta-data. Signed-off-by: Matan Barak <matanb@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
4028 lines
111 KiB
C
4028 lines
111 KiB
C
/*
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* Copyright (c) 2004-2007 Intel Corporation. All rights reserved.
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* Copyright (c) 2004 Topspin Corporation. All rights reserved.
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* Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. 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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#include <linux/completion.h>
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#include <linux/dma-mapping.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/idr.h>
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#include <linux/interrupt.h>
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#include <linux/random.h>
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#include <linux/rbtree.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/sysfs.h>
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#include <linux/workqueue.h>
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#include <linux/kdev_t.h>
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#include <linux/etherdevice.h>
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#include <rdma/ib_cache.h>
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#include <rdma/ib_cm.h>
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#include "cm_msgs.h"
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MODULE_AUTHOR("Sean Hefty");
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MODULE_DESCRIPTION("InfiniBand CM");
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MODULE_LICENSE("Dual BSD/GPL");
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static void cm_add_one(struct ib_device *device);
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static void cm_remove_one(struct ib_device *device, void *client_data);
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static struct ib_client cm_client = {
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.name = "cm",
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.add = cm_add_one,
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.remove = cm_remove_one
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};
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static struct ib_cm {
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spinlock_t lock;
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struct list_head device_list;
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rwlock_t device_lock;
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struct rb_root listen_service_table;
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u64 listen_service_id;
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/* struct rb_root peer_service_table; todo: fix peer to peer */
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struct rb_root remote_qp_table;
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struct rb_root remote_id_table;
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struct rb_root remote_sidr_table;
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struct idr local_id_table;
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__be32 random_id_operand;
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struct list_head timewait_list;
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struct workqueue_struct *wq;
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} cm;
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/* Counter indexes ordered by attribute ID */
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enum {
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CM_REQ_COUNTER,
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CM_MRA_COUNTER,
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CM_REJ_COUNTER,
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CM_REP_COUNTER,
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CM_RTU_COUNTER,
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CM_DREQ_COUNTER,
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CM_DREP_COUNTER,
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CM_SIDR_REQ_COUNTER,
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CM_SIDR_REP_COUNTER,
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CM_LAP_COUNTER,
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CM_APR_COUNTER,
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CM_ATTR_COUNT,
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CM_ATTR_ID_OFFSET = 0x0010,
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};
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enum {
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CM_XMIT,
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CM_XMIT_RETRIES,
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CM_RECV,
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CM_RECV_DUPLICATES,
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CM_COUNTER_GROUPS
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};
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static char const counter_group_names[CM_COUNTER_GROUPS]
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[sizeof("cm_rx_duplicates")] = {
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"cm_tx_msgs", "cm_tx_retries",
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"cm_rx_msgs", "cm_rx_duplicates"
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};
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struct cm_counter_group {
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struct kobject obj;
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atomic_long_t counter[CM_ATTR_COUNT];
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};
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struct cm_counter_attribute {
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struct attribute attr;
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int index;
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};
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#define CM_COUNTER_ATTR(_name, _index) \
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struct cm_counter_attribute cm_##_name##_counter_attr = { \
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.attr = { .name = __stringify(_name), .mode = 0444 }, \
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.index = _index \
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}
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static CM_COUNTER_ATTR(req, CM_REQ_COUNTER);
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static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER);
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static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER);
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static CM_COUNTER_ATTR(rep, CM_REP_COUNTER);
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static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER);
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static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER);
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static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER);
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static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER);
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static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER);
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static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER);
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static CM_COUNTER_ATTR(apr, CM_APR_COUNTER);
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static struct attribute *cm_counter_default_attrs[] = {
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&cm_req_counter_attr.attr,
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&cm_mra_counter_attr.attr,
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&cm_rej_counter_attr.attr,
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&cm_rep_counter_attr.attr,
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&cm_rtu_counter_attr.attr,
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&cm_dreq_counter_attr.attr,
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&cm_drep_counter_attr.attr,
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&cm_sidr_req_counter_attr.attr,
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&cm_sidr_rep_counter_attr.attr,
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&cm_lap_counter_attr.attr,
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&cm_apr_counter_attr.attr,
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NULL
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};
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struct cm_port {
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struct cm_device *cm_dev;
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struct ib_mad_agent *mad_agent;
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struct kobject port_obj;
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u8 port_num;
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struct cm_counter_group counter_group[CM_COUNTER_GROUPS];
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};
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struct cm_device {
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struct list_head list;
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struct ib_device *ib_device;
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struct device *device;
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u8 ack_delay;
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int going_down;
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struct cm_port *port[0];
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};
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struct cm_av {
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struct cm_port *port;
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union ib_gid dgid;
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struct ib_ah_attr ah_attr;
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u16 pkey_index;
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u8 timeout;
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};
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struct cm_work {
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struct delayed_work work;
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struct list_head list;
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struct cm_port *port;
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struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
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__be32 local_id; /* Established / timewait */
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__be32 remote_id;
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struct ib_cm_event cm_event;
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struct ib_sa_path_rec path[0];
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};
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struct cm_timewait_info {
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struct cm_work work; /* Must be first. */
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struct list_head list;
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struct rb_node remote_qp_node;
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struct rb_node remote_id_node;
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__be64 remote_ca_guid;
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__be32 remote_qpn;
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u8 inserted_remote_qp;
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u8 inserted_remote_id;
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};
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struct cm_id_private {
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struct ib_cm_id id;
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struct rb_node service_node;
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struct rb_node sidr_id_node;
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spinlock_t lock; /* Do not acquire inside cm.lock */
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struct completion comp;
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atomic_t refcount;
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/* Number of clients sharing this ib_cm_id. Only valid for listeners.
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* Protected by the cm.lock spinlock. */
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int listen_sharecount;
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struct ib_mad_send_buf *msg;
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struct cm_timewait_info *timewait_info;
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/* todo: use alternate port on send failure */
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struct cm_av av;
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struct cm_av alt_av;
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void *private_data;
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__be64 tid;
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__be32 local_qpn;
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__be32 remote_qpn;
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enum ib_qp_type qp_type;
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__be32 sq_psn;
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__be32 rq_psn;
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int timeout_ms;
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enum ib_mtu path_mtu;
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__be16 pkey;
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u8 private_data_len;
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u8 max_cm_retries;
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u8 peer_to_peer;
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u8 responder_resources;
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u8 initiator_depth;
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u8 retry_count;
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u8 rnr_retry_count;
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u8 service_timeout;
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u8 target_ack_delay;
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struct list_head work_list;
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atomic_t work_count;
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};
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static void cm_work_handler(struct work_struct *work);
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static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
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{
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if (atomic_dec_and_test(&cm_id_priv->refcount))
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complete(&cm_id_priv->comp);
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}
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static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
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struct ib_mad_send_buf **msg)
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{
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struct ib_mad_agent *mad_agent;
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struct ib_mad_send_buf *m;
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struct ib_ah *ah;
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mad_agent = cm_id_priv->av.port->mad_agent;
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ah = ib_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr);
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if (IS_ERR(ah))
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return PTR_ERR(ah);
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m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
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cm_id_priv->av.pkey_index,
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0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
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GFP_ATOMIC,
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IB_MGMT_BASE_VERSION);
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if (IS_ERR(m)) {
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ib_destroy_ah(ah);
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return PTR_ERR(m);
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}
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/* Timeout set by caller if response is expected. */
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m->ah = ah;
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m->retries = cm_id_priv->max_cm_retries;
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atomic_inc(&cm_id_priv->refcount);
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m->context[0] = cm_id_priv;
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*msg = m;
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return 0;
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}
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static int cm_alloc_response_msg(struct cm_port *port,
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struct ib_mad_recv_wc *mad_recv_wc,
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struct ib_mad_send_buf **msg)
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{
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struct ib_mad_send_buf *m;
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struct ib_ah *ah;
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ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
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mad_recv_wc->recv_buf.grh, port->port_num);
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if (IS_ERR(ah))
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return PTR_ERR(ah);
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m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
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0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
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GFP_ATOMIC,
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IB_MGMT_BASE_VERSION);
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if (IS_ERR(m)) {
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ib_destroy_ah(ah);
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return PTR_ERR(m);
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}
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m->ah = ah;
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*msg = m;
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return 0;
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}
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static void cm_free_msg(struct ib_mad_send_buf *msg)
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{
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ib_destroy_ah(msg->ah);
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if (msg->context[0])
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cm_deref_id(msg->context[0]);
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ib_free_send_mad(msg);
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}
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static void * cm_copy_private_data(const void *private_data,
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u8 private_data_len)
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{
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void *data;
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if (!private_data || !private_data_len)
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return NULL;
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data = kmemdup(private_data, private_data_len, GFP_KERNEL);
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if (!data)
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return ERR_PTR(-ENOMEM);
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return data;
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}
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static void cm_set_private_data(struct cm_id_private *cm_id_priv,
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void *private_data, u8 private_data_len)
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{
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if (cm_id_priv->private_data && cm_id_priv->private_data_len)
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kfree(cm_id_priv->private_data);
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cm_id_priv->private_data = private_data;
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cm_id_priv->private_data_len = private_data_len;
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}
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static void cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
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struct ib_grh *grh, struct cm_av *av)
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{
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av->port = port;
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av->pkey_index = wc->pkey_index;
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ib_init_ah_from_wc(port->cm_dev->ib_device, port->port_num, wc,
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grh, &av->ah_attr);
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}
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static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av)
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{
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struct cm_device *cm_dev;
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struct cm_port *port = NULL;
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unsigned long flags;
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int ret;
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u8 p;
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struct net_device *ndev = ib_get_ndev_from_path(path);
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read_lock_irqsave(&cm.device_lock, flags);
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list_for_each_entry(cm_dev, &cm.device_list, list) {
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if (!ib_find_cached_gid(cm_dev->ib_device, &path->sgid,
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IB_GID_TYPE_IB, ndev, &p, NULL)) {
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port = cm_dev->port[p-1];
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break;
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}
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}
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read_unlock_irqrestore(&cm.device_lock, flags);
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if (ndev)
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dev_put(ndev);
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if (!port)
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return -EINVAL;
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ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num,
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be16_to_cpu(path->pkey), &av->pkey_index);
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if (ret)
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return ret;
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av->port = port;
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ib_init_ah_from_path(cm_dev->ib_device, port->port_num, path,
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&av->ah_attr);
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av->timeout = path->packet_life_time + 1;
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return 0;
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}
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static int cm_alloc_id(struct cm_id_private *cm_id_priv)
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{
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unsigned long flags;
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int id;
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idr_preload(GFP_KERNEL);
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spin_lock_irqsave(&cm.lock, flags);
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id = idr_alloc_cyclic(&cm.local_id_table, cm_id_priv, 0, 0, GFP_NOWAIT);
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spin_unlock_irqrestore(&cm.lock, flags);
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idr_preload_end();
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cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand;
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return id < 0 ? id : 0;
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}
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static void cm_free_id(__be32 local_id)
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{
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spin_lock_irq(&cm.lock);
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idr_remove(&cm.local_id_table,
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(__force int) (local_id ^ cm.random_id_operand));
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spin_unlock_irq(&cm.lock);
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}
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static struct cm_id_private * cm_get_id(__be32 local_id, __be32 remote_id)
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{
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struct cm_id_private *cm_id_priv;
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cm_id_priv = idr_find(&cm.local_id_table,
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(__force int) (local_id ^ cm.random_id_operand));
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if (cm_id_priv) {
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if (cm_id_priv->id.remote_id == remote_id)
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atomic_inc(&cm_id_priv->refcount);
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else
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cm_id_priv = NULL;
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}
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return cm_id_priv;
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}
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static struct cm_id_private * cm_acquire_id(__be32 local_id, __be32 remote_id)
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{
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struct cm_id_private *cm_id_priv;
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spin_lock_irq(&cm.lock);
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cm_id_priv = cm_get_id(local_id, remote_id);
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spin_unlock_irq(&cm.lock);
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return cm_id_priv;
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}
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/*
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* Trivial helpers to strip endian annotation and compare; the
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* endianness doesn't actually matter since we just need a stable
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* order for the RB tree.
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*/
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static int be32_lt(__be32 a, __be32 b)
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{
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return (__force u32) a < (__force u32) b;
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}
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static int be32_gt(__be32 a, __be32 b)
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{
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return (__force u32) a > (__force u32) b;
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}
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static int be64_lt(__be64 a, __be64 b)
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{
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return (__force u64) a < (__force u64) b;
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}
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static int be64_gt(__be64 a, __be64 b)
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{
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return (__force u64) a > (__force u64) b;
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}
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static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
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{
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struct rb_node **link = &cm.listen_service_table.rb_node;
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struct rb_node *parent = NULL;
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struct cm_id_private *cur_cm_id_priv;
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__be64 service_id = cm_id_priv->id.service_id;
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__be64 service_mask = cm_id_priv->id.service_mask;
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while (*link) {
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parent = *link;
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cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
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service_node);
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if ((cur_cm_id_priv->id.service_mask & service_id) ==
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(service_mask & cur_cm_id_priv->id.service_id) &&
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(cm_id_priv->id.device == cur_cm_id_priv->id.device))
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return cur_cm_id_priv;
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|
|
if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
|
|
link = &(*link)->rb_left;
|
|
else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
|
|
link = &(*link)->rb_right;
|
|
else if (be64_lt(service_id, cur_cm_id_priv->id.service_id))
|
|
link = &(*link)->rb_left;
|
|
else if (be64_gt(service_id, cur_cm_id_priv->id.service_id))
|
|
link = &(*link)->rb_right;
|
|
else
|
|
link = &(*link)->rb_right;
|
|
}
|
|
rb_link_node(&cm_id_priv->service_node, parent, link);
|
|
rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
|
|
return NULL;
|
|
}
|
|
|
|
static struct cm_id_private * cm_find_listen(struct ib_device *device,
|
|
__be64 service_id)
|
|
{
|
|
struct rb_node *node = cm.listen_service_table.rb_node;
|
|
struct cm_id_private *cm_id_priv;
|
|
|
|
while (node) {
|
|
cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
|
|
if ((cm_id_priv->id.service_mask & service_id) ==
|
|
cm_id_priv->id.service_id &&
|
|
(cm_id_priv->id.device == device))
|
|
return cm_id_priv;
|
|
|
|
if (device < cm_id_priv->id.device)
|
|
node = node->rb_left;
|
|
else if (device > cm_id_priv->id.device)
|
|
node = node->rb_right;
|
|
else if (be64_lt(service_id, cm_id_priv->id.service_id))
|
|
node = node->rb_left;
|
|
else if (be64_gt(service_id, cm_id_priv->id.service_id))
|
|
node = node->rb_right;
|
|
else
|
|
node = node->rb_right;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info
|
|
*timewait_info)
|
|
{
|
|
struct rb_node **link = &cm.remote_id_table.rb_node;
|
|
struct rb_node *parent = NULL;
|
|
struct cm_timewait_info *cur_timewait_info;
|
|
__be64 remote_ca_guid = timewait_info->remote_ca_guid;
|
|
__be32 remote_id = timewait_info->work.remote_id;
|
|
|
|
while (*link) {
|
|
parent = *link;
|
|
cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
|
|
remote_id_node);
|
|
if (be32_lt(remote_id, cur_timewait_info->work.remote_id))
|
|
link = &(*link)->rb_left;
|
|
else if (be32_gt(remote_id, cur_timewait_info->work.remote_id))
|
|
link = &(*link)->rb_right;
|
|
else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
|
|
link = &(*link)->rb_left;
|
|
else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
|
|
link = &(*link)->rb_right;
|
|
else
|
|
return cur_timewait_info;
|
|
}
|
|
timewait_info->inserted_remote_id = 1;
|
|
rb_link_node(&timewait_info->remote_id_node, parent, link);
|
|
rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table);
|
|
return NULL;
|
|
}
|
|
|
|
static struct cm_timewait_info * cm_find_remote_id(__be64 remote_ca_guid,
|
|
__be32 remote_id)
|
|
{
|
|
struct rb_node *node = cm.remote_id_table.rb_node;
|
|
struct cm_timewait_info *timewait_info;
|
|
|
|
while (node) {
|
|
timewait_info = rb_entry(node, struct cm_timewait_info,
|
|
remote_id_node);
|
|
if (be32_lt(remote_id, timewait_info->work.remote_id))
|
|
node = node->rb_left;
|
|
else if (be32_gt(remote_id, timewait_info->work.remote_id))
|
|
node = node->rb_right;
|
|
else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid))
|
|
node = node->rb_left;
|
|
else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid))
|
|
node = node->rb_right;
|
|
else
|
|
return timewait_info;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info
|
|
*timewait_info)
|
|
{
|
|
struct rb_node **link = &cm.remote_qp_table.rb_node;
|
|
struct rb_node *parent = NULL;
|
|
struct cm_timewait_info *cur_timewait_info;
|
|
__be64 remote_ca_guid = timewait_info->remote_ca_guid;
|
|
__be32 remote_qpn = timewait_info->remote_qpn;
|
|
|
|
while (*link) {
|
|
parent = *link;
|
|
cur_timewait_info = rb_entry(parent, struct cm_timewait_info,
|
|
remote_qp_node);
|
|
if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn))
|
|
link = &(*link)->rb_left;
|
|
else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn))
|
|
link = &(*link)->rb_right;
|
|
else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
|
|
link = &(*link)->rb_left;
|
|
else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid))
|
|
link = &(*link)->rb_right;
|
|
else
|
|
return cur_timewait_info;
|
|
}
|
|
timewait_info->inserted_remote_qp = 1;
|
|
rb_link_node(&timewait_info->remote_qp_node, parent, link);
|
|
rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table);
|
|
return NULL;
|
|
}
|
|
|
|
static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private
|
|
*cm_id_priv)
|
|
{
|
|
struct rb_node **link = &cm.remote_sidr_table.rb_node;
|
|
struct rb_node *parent = NULL;
|
|
struct cm_id_private *cur_cm_id_priv;
|
|
union ib_gid *port_gid = &cm_id_priv->av.dgid;
|
|
__be32 remote_id = cm_id_priv->id.remote_id;
|
|
|
|
while (*link) {
|
|
parent = *link;
|
|
cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
|
|
sidr_id_node);
|
|
if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id))
|
|
link = &(*link)->rb_left;
|
|
else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id))
|
|
link = &(*link)->rb_right;
|
|
else {
|
|
int cmp;
|
|
cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
|
|
sizeof *port_gid);
|
|
if (cmp < 0)
|
|
link = &(*link)->rb_left;
|
|
else if (cmp > 0)
|
|
link = &(*link)->rb_right;
|
|
else
|
|
return cur_cm_id_priv;
|
|
}
|
|
}
|
|
rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
|
|
rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
|
|
return NULL;
|
|
}
|
|
|
|
static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
|
|
enum ib_cm_sidr_status status)
|
|
{
|
|
struct ib_cm_sidr_rep_param param;
|
|
|
|
memset(¶m, 0, sizeof param);
|
|
param.status = status;
|
|
ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m);
|
|
}
|
|
|
|
struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
|
|
ib_cm_handler cm_handler,
|
|
void *context)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
int ret;
|
|
|
|
cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL);
|
|
if (!cm_id_priv)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
cm_id_priv->id.state = IB_CM_IDLE;
|
|
cm_id_priv->id.device = device;
|
|
cm_id_priv->id.cm_handler = cm_handler;
|
|
cm_id_priv->id.context = context;
|
|
cm_id_priv->id.remote_cm_qpn = 1;
|
|
ret = cm_alloc_id(cm_id_priv);
|
|
if (ret)
|
|
goto error;
|
|
|
|
spin_lock_init(&cm_id_priv->lock);
|
|
init_completion(&cm_id_priv->comp);
|
|
INIT_LIST_HEAD(&cm_id_priv->work_list);
|
|
atomic_set(&cm_id_priv->work_count, -1);
|
|
atomic_set(&cm_id_priv->refcount, 1);
|
|
return &cm_id_priv->id;
|
|
|
|
error:
|
|
kfree(cm_id_priv);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
EXPORT_SYMBOL(ib_create_cm_id);
|
|
|
|
static struct cm_work * cm_dequeue_work(struct cm_id_private *cm_id_priv)
|
|
{
|
|
struct cm_work *work;
|
|
|
|
if (list_empty(&cm_id_priv->work_list))
|
|
return NULL;
|
|
|
|
work = list_entry(cm_id_priv->work_list.next, struct cm_work, list);
|
|
list_del(&work->list);
|
|
return work;
|
|
}
|
|
|
|
static void cm_free_work(struct cm_work *work)
|
|
{
|
|
if (work->mad_recv_wc)
|
|
ib_free_recv_mad(work->mad_recv_wc);
|
|
kfree(work);
|
|
}
|
|
|
|
static inline int cm_convert_to_ms(int iba_time)
|
|
{
|
|
/* approximate conversion to ms from 4.096us x 2^iba_time */
|
|
return 1 << max(iba_time - 8, 0);
|
|
}
|
|
|
|
/*
|
|
* calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time
|
|
* Because of how ack_timeout is stored, adding one doubles the timeout.
|
|
* To avoid large timeouts, select the max(ack_delay, life_time + 1), and
|
|
* increment it (round up) only if the other is within 50%.
|
|
*/
|
|
static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time)
|
|
{
|
|
int ack_timeout = packet_life_time + 1;
|
|
|
|
if (ack_timeout >= ca_ack_delay)
|
|
ack_timeout += (ca_ack_delay >= (ack_timeout - 1));
|
|
else
|
|
ack_timeout = ca_ack_delay +
|
|
(ack_timeout >= (ca_ack_delay - 1));
|
|
|
|
return min(31, ack_timeout);
|
|
}
|
|
|
|
static void cm_cleanup_timewait(struct cm_timewait_info *timewait_info)
|
|
{
|
|
if (timewait_info->inserted_remote_id) {
|
|
rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table);
|
|
timewait_info->inserted_remote_id = 0;
|
|
}
|
|
|
|
if (timewait_info->inserted_remote_qp) {
|
|
rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table);
|
|
timewait_info->inserted_remote_qp = 0;
|
|
}
|
|
}
|
|
|
|
static struct cm_timewait_info * cm_create_timewait_info(__be32 local_id)
|
|
{
|
|
struct cm_timewait_info *timewait_info;
|
|
|
|
timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL);
|
|
if (!timewait_info)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
timewait_info->work.local_id = local_id;
|
|
INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler);
|
|
timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT;
|
|
return timewait_info;
|
|
}
|
|
|
|
static void cm_enter_timewait(struct cm_id_private *cm_id_priv)
|
|
{
|
|
int wait_time;
|
|
unsigned long flags;
|
|
struct cm_device *cm_dev;
|
|
|
|
cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client);
|
|
if (!cm_dev)
|
|
return;
|
|
|
|
spin_lock_irqsave(&cm.lock, flags);
|
|
cm_cleanup_timewait(cm_id_priv->timewait_info);
|
|
list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list);
|
|
spin_unlock_irqrestore(&cm.lock, flags);
|
|
|
|
/*
|
|
* The cm_id could be destroyed by the user before we exit timewait.
|
|
* To protect against this, we search for the cm_id after exiting
|
|
* timewait before notifying the user that we've exited timewait.
|
|
*/
|
|
cm_id_priv->id.state = IB_CM_TIMEWAIT;
|
|
wait_time = cm_convert_to_ms(cm_id_priv->av.timeout);
|
|
|
|
/* Check if the device started its remove_one */
|
|
spin_lock_irq(&cm.lock);
|
|
if (!cm_dev->going_down)
|
|
queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
|
|
msecs_to_jiffies(wait_time));
|
|
spin_unlock_irq(&cm.lock);
|
|
|
|
cm_id_priv->timewait_info = NULL;
|
|
}
|
|
|
|
static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
|
|
{
|
|
unsigned long flags;
|
|
|
|
cm_id_priv->id.state = IB_CM_IDLE;
|
|
if (cm_id_priv->timewait_info) {
|
|
spin_lock_irqsave(&cm.lock, flags);
|
|
cm_cleanup_timewait(cm_id_priv->timewait_info);
|
|
spin_unlock_irqrestore(&cm.lock, flags);
|
|
kfree(cm_id_priv->timewait_info);
|
|
cm_id_priv->timewait_info = NULL;
|
|
}
|
|
}
|
|
|
|
static void cm_destroy_id(struct ib_cm_id *cm_id, int err)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_work *work;
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
retest:
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
switch (cm_id->state) {
|
|
case IB_CM_LISTEN:
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
spin_lock_irq(&cm.lock);
|
|
if (--cm_id_priv->listen_sharecount > 0) {
|
|
/* The id is still shared. */
|
|
cm_deref_id(cm_id_priv);
|
|
spin_unlock_irq(&cm.lock);
|
|
return;
|
|
}
|
|
rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
|
|
spin_unlock_irq(&cm.lock);
|
|
break;
|
|
case IB_CM_SIDR_REQ_SENT:
|
|
cm_id->state = IB_CM_IDLE;
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
break;
|
|
case IB_CM_SIDR_REQ_RCVD:
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
cm_reject_sidr_req(cm_id_priv, IB_SIDR_REJECT);
|
|
spin_lock_irq(&cm.lock);
|
|
if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node))
|
|
rb_erase(&cm_id_priv->sidr_id_node,
|
|
&cm.remote_sidr_table);
|
|
spin_unlock_irq(&cm.lock);
|
|
break;
|
|
case IB_CM_REQ_SENT:
|
|
case IB_CM_MRA_REQ_RCVD:
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
ib_send_cm_rej(cm_id, IB_CM_REJ_TIMEOUT,
|
|
&cm_id_priv->id.device->node_guid,
|
|
sizeof cm_id_priv->id.device->node_guid,
|
|
NULL, 0);
|
|
break;
|
|
case IB_CM_REQ_RCVD:
|
|
if (err == -ENOMEM) {
|
|
/* Do not reject to allow future retries. */
|
|
cm_reset_to_idle(cm_id_priv);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
} else {
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
|
|
NULL, 0, NULL, 0);
|
|
}
|
|
break;
|
|
case IB_CM_REP_SENT:
|
|
case IB_CM_MRA_REP_RCVD:
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
/* Fall through */
|
|
case IB_CM_MRA_REQ_SENT:
|
|
case IB_CM_REP_RCVD:
|
|
case IB_CM_MRA_REP_SENT:
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
ib_send_cm_rej(cm_id, IB_CM_REJ_CONSUMER_DEFINED,
|
|
NULL, 0, NULL, 0);
|
|
break;
|
|
case IB_CM_ESTABLISHED:
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
if (cm_id_priv->qp_type == IB_QPT_XRC_TGT)
|
|
break;
|
|
ib_send_cm_dreq(cm_id, NULL, 0);
|
|
goto retest;
|
|
case IB_CM_DREQ_SENT:
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
cm_enter_timewait(cm_id_priv);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
break;
|
|
case IB_CM_DREQ_RCVD:
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
ib_send_cm_drep(cm_id, NULL, 0);
|
|
break;
|
|
default:
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
break;
|
|
}
|
|
|
|
cm_free_id(cm_id->local_id);
|
|
cm_deref_id(cm_id_priv);
|
|
wait_for_completion(&cm_id_priv->comp);
|
|
while ((work = cm_dequeue_work(cm_id_priv)) != NULL)
|
|
cm_free_work(work);
|
|
kfree(cm_id_priv->private_data);
|
|
kfree(cm_id_priv);
|
|
}
|
|
|
|
void ib_destroy_cm_id(struct ib_cm_id *cm_id)
|
|
{
|
|
cm_destroy_id(cm_id, 0);
|
|
}
|
|
EXPORT_SYMBOL(ib_destroy_cm_id);
|
|
|
|
/**
|
|
* __ib_cm_listen - Initiates listening on the specified service ID for
|
|
* connection and service ID resolution requests.
|
|
* @cm_id: Connection identifier associated with the listen request.
|
|
* @service_id: Service identifier matched against incoming connection
|
|
* and service ID resolution requests. The service ID should be specified
|
|
* network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
|
|
* assign a service ID to the caller.
|
|
* @service_mask: Mask applied to service ID used to listen across a
|
|
* range of service IDs. If set to 0, the service ID is matched
|
|
* exactly. This parameter is ignored if %service_id is set to
|
|
* IB_CM_ASSIGN_SERVICE_ID.
|
|
*/
|
|
static int __ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id,
|
|
__be64 service_mask)
|
|
{
|
|
struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
|
|
int ret = 0;
|
|
|
|
service_mask = service_mask ? service_mask : ~cpu_to_be64(0);
|
|
service_id &= service_mask;
|
|
if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID &&
|
|
(service_id != IB_CM_ASSIGN_SERVICE_ID))
|
|
return -EINVAL;
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
if (cm_id->state != IB_CM_IDLE)
|
|
return -EINVAL;
|
|
|
|
cm_id->state = IB_CM_LISTEN;
|
|
++cm_id_priv->listen_sharecount;
|
|
|
|
if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
|
|
cm_id->service_id = cpu_to_be64(cm.listen_service_id++);
|
|
cm_id->service_mask = ~cpu_to_be64(0);
|
|
} else {
|
|
cm_id->service_id = service_id;
|
|
cm_id->service_mask = service_mask;
|
|
}
|
|
cur_cm_id_priv = cm_insert_listen(cm_id_priv);
|
|
|
|
if (cur_cm_id_priv) {
|
|
cm_id->state = IB_CM_IDLE;
|
|
--cm_id_priv->listen_sharecount;
|
|
ret = -EBUSY;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&cm.lock, flags);
|
|
ret = __ib_cm_listen(cm_id, service_id, service_mask);
|
|
spin_unlock_irqrestore(&cm.lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_cm_listen);
|
|
|
|
/**
|
|
* Create a new listening ib_cm_id and listen on the given service ID.
|
|
*
|
|
* If there's an existing ID listening on that same device and service ID,
|
|
* return it.
|
|
*
|
|
* @device: Device associated with the cm_id. All related communication will
|
|
* be associated with the specified device.
|
|
* @cm_handler: Callback invoked to notify the user of CM events.
|
|
* @service_id: Service identifier matched against incoming connection
|
|
* and service ID resolution requests. The service ID should be specified
|
|
* network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will
|
|
* assign a service ID to the caller.
|
|
*
|
|
* Callers should call ib_destroy_cm_id when done with the listener ID.
|
|
*/
|
|
struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device,
|
|
ib_cm_handler cm_handler,
|
|
__be64 service_id)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_cm_id *cm_id;
|
|
unsigned long flags;
|
|
int err = 0;
|
|
|
|
/* Create an ID in advance, since the creation may sleep */
|
|
cm_id = ib_create_cm_id(device, cm_handler, NULL);
|
|
if (IS_ERR(cm_id))
|
|
return cm_id;
|
|
|
|
spin_lock_irqsave(&cm.lock, flags);
|
|
|
|
if (service_id == IB_CM_ASSIGN_SERVICE_ID)
|
|
goto new_id;
|
|
|
|
/* Find an existing ID */
|
|
cm_id_priv = cm_find_listen(device, service_id);
|
|
if (cm_id_priv) {
|
|
if (cm_id->cm_handler != cm_handler || cm_id->context) {
|
|
/* Sharing an ib_cm_id with different handlers is not
|
|
* supported */
|
|
spin_unlock_irqrestore(&cm.lock, flags);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
atomic_inc(&cm_id_priv->refcount);
|
|
++cm_id_priv->listen_sharecount;
|
|
spin_unlock_irqrestore(&cm.lock, flags);
|
|
|
|
ib_destroy_cm_id(cm_id);
|
|
cm_id = &cm_id_priv->id;
|
|
return cm_id;
|
|
}
|
|
|
|
new_id:
|
|
/* Use newly created ID */
|
|
err = __ib_cm_listen(cm_id, service_id, 0);
|
|
|
|
spin_unlock_irqrestore(&cm.lock, flags);
|
|
|
|
if (err) {
|
|
ib_destroy_cm_id(cm_id);
|
|
return ERR_PTR(err);
|
|
}
|
|
return cm_id;
|
|
}
|
|
EXPORT_SYMBOL(ib_cm_insert_listen);
|
|
|
|
static __be64 cm_form_tid(struct cm_id_private *cm_id_priv,
|
|
enum cm_msg_sequence msg_seq)
|
|
{
|
|
u64 hi_tid, low_tid;
|
|
|
|
hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
|
|
low_tid = (u64) ((__force u32)cm_id_priv->id.local_id |
|
|
(msg_seq << 30));
|
|
return cpu_to_be64(hi_tid | low_tid);
|
|
}
|
|
|
|
static void cm_format_mad_hdr(struct ib_mad_hdr *hdr,
|
|
__be16 attr_id, __be64 tid)
|
|
{
|
|
hdr->base_version = IB_MGMT_BASE_VERSION;
|
|
hdr->mgmt_class = IB_MGMT_CLASS_CM;
|
|
hdr->class_version = IB_CM_CLASS_VERSION;
|
|
hdr->method = IB_MGMT_METHOD_SEND;
|
|
hdr->attr_id = attr_id;
|
|
hdr->tid = tid;
|
|
}
|
|
|
|
static void cm_format_req(struct cm_req_msg *req_msg,
|
|
struct cm_id_private *cm_id_priv,
|
|
struct ib_cm_req_param *param)
|
|
{
|
|
struct ib_sa_path_rec *pri_path = param->primary_path;
|
|
struct ib_sa_path_rec *alt_path = param->alternate_path;
|
|
|
|
cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
|
|
cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ));
|
|
|
|
req_msg->local_comm_id = cm_id_priv->id.local_id;
|
|
req_msg->service_id = param->service_id;
|
|
req_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
|
|
cm_req_set_local_qpn(req_msg, cpu_to_be32(param->qp_num));
|
|
cm_req_set_init_depth(req_msg, param->initiator_depth);
|
|
cm_req_set_remote_resp_timeout(req_msg,
|
|
param->remote_cm_response_timeout);
|
|
cm_req_set_qp_type(req_msg, param->qp_type);
|
|
cm_req_set_flow_ctrl(req_msg, param->flow_control);
|
|
cm_req_set_starting_psn(req_msg, cpu_to_be32(param->starting_psn));
|
|
cm_req_set_local_resp_timeout(req_msg,
|
|
param->local_cm_response_timeout);
|
|
req_msg->pkey = param->primary_path->pkey;
|
|
cm_req_set_path_mtu(req_msg, param->primary_path->mtu);
|
|
cm_req_set_max_cm_retries(req_msg, param->max_cm_retries);
|
|
|
|
if (param->qp_type != IB_QPT_XRC_INI) {
|
|
cm_req_set_resp_res(req_msg, param->responder_resources);
|
|
cm_req_set_retry_count(req_msg, param->retry_count);
|
|
cm_req_set_rnr_retry_count(req_msg, param->rnr_retry_count);
|
|
cm_req_set_srq(req_msg, param->srq);
|
|
}
|
|
|
|
if (pri_path->hop_limit <= 1) {
|
|
req_msg->primary_local_lid = pri_path->slid;
|
|
req_msg->primary_remote_lid = pri_path->dlid;
|
|
} else {
|
|
/* Work-around until there's a way to obtain remote LID info */
|
|
req_msg->primary_local_lid = IB_LID_PERMISSIVE;
|
|
req_msg->primary_remote_lid = IB_LID_PERMISSIVE;
|
|
}
|
|
req_msg->primary_local_gid = pri_path->sgid;
|
|
req_msg->primary_remote_gid = pri_path->dgid;
|
|
cm_req_set_primary_flow_label(req_msg, pri_path->flow_label);
|
|
cm_req_set_primary_packet_rate(req_msg, pri_path->rate);
|
|
req_msg->primary_traffic_class = pri_path->traffic_class;
|
|
req_msg->primary_hop_limit = pri_path->hop_limit;
|
|
cm_req_set_primary_sl(req_msg, pri_path->sl);
|
|
cm_req_set_primary_subnet_local(req_msg, (pri_path->hop_limit <= 1));
|
|
cm_req_set_primary_local_ack_timeout(req_msg,
|
|
cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
|
|
pri_path->packet_life_time));
|
|
|
|
if (alt_path) {
|
|
if (alt_path->hop_limit <= 1) {
|
|
req_msg->alt_local_lid = alt_path->slid;
|
|
req_msg->alt_remote_lid = alt_path->dlid;
|
|
} else {
|
|
req_msg->alt_local_lid = IB_LID_PERMISSIVE;
|
|
req_msg->alt_remote_lid = IB_LID_PERMISSIVE;
|
|
}
|
|
req_msg->alt_local_gid = alt_path->sgid;
|
|
req_msg->alt_remote_gid = alt_path->dgid;
|
|
cm_req_set_alt_flow_label(req_msg,
|
|
alt_path->flow_label);
|
|
cm_req_set_alt_packet_rate(req_msg, alt_path->rate);
|
|
req_msg->alt_traffic_class = alt_path->traffic_class;
|
|
req_msg->alt_hop_limit = alt_path->hop_limit;
|
|
cm_req_set_alt_sl(req_msg, alt_path->sl);
|
|
cm_req_set_alt_subnet_local(req_msg, (alt_path->hop_limit <= 1));
|
|
cm_req_set_alt_local_ack_timeout(req_msg,
|
|
cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
|
|
alt_path->packet_life_time));
|
|
}
|
|
|
|
if (param->private_data && param->private_data_len)
|
|
memcpy(req_msg->private_data, param->private_data,
|
|
param->private_data_len);
|
|
}
|
|
|
|
static int cm_validate_req_param(struct ib_cm_req_param *param)
|
|
{
|
|
/* peer-to-peer not supported */
|
|
if (param->peer_to_peer)
|
|
return -EINVAL;
|
|
|
|
if (!param->primary_path)
|
|
return -EINVAL;
|
|
|
|
if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC &&
|
|
param->qp_type != IB_QPT_XRC_INI)
|
|
return -EINVAL;
|
|
|
|
if (param->private_data &&
|
|
param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE)
|
|
return -EINVAL;
|
|
|
|
if (param->alternate_path &&
|
|
(param->alternate_path->pkey != param->primary_path->pkey ||
|
|
param->alternate_path->mtu != param->primary_path->mtu))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ib_send_cm_req(struct ib_cm_id *cm_id,
|
|
struct ib_cm_req_param *param)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_req_msg *req_msg;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
ret = cm_validate_req_param(param);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Verify that we're not in timewait. */
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
if (cm_id->state != IB_CM_IDLE) {
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
|
|
cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
|
|
id.local_id);
|
|
if (IS_ERR(cm_id_priv->timewait_info)) {
|
|
ret = PTR_ERR(cm_id_priv->timewait_info);
|
|
goto out;
|
|
}
|
|
|
|
ret = cm_init_av_by_path(param->primary_path, &cm_id_priv->av);
|
|
if (ret)
|
|
goto error1;
|
|
if (param->alternate_path) {
|
|
ret = cm_init_av_by_path(param->alternate_path,
|
|
&cm_id_priv->alt_av);
|
|
if (ret)
|
|
goto error1;
|
|
}
|
|
cm_id->service_id = param->service_id;
|
|
cm_id->service_mask = ~cpu_to_be64(0);
|
|
cm_id_priv->timeout_ms = cm_convert_to_ms(
|
|
param->primary_path->packet_life_time) * 2 +
|
|
cm_convert_to_ms(
|
|
param->remote_cm_response_timeout);
|
|
cm_id_priv->max_cm_retries = param->max_cm_retries;
|
|
cm_id_priv->initiator_depth = param->initiator_depth;
|
|
cm_id_priv->responder_resources = param->responder_resources;
|
|
cm_id_priv->retry_count = param->retry_count;
|
|
cm_id_priv->path_mtu = param->primary_path->mtu;
|
|
cm_id_priv->pkey = param->primary_path->pkey;
|
|
cm_id_priv->qp_type = param->qp_type;
|
|
|
|
ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
|
|
if (ret)
|
|
goto error1;
|
|
|
|
req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
|
|
cm_format_req(req_msg, cm_id_priv, param);
|
|
cm_id_priv->tid = req_msg->hdr.tid;
|
|
cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
|
|
cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
|
|
|
|
cm_id_priv->local_qpn = cm_req_get_local_qpn(req_msg);
|
|
cm_id_priv->rq_psn = cm_req_get_starting_psn(req_msg);
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
ret = ib_post_send_mad(cm_id_priv->msg, NULL);
|
|
if (ret) {
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
goto error2;
|
|
}
|
|
BUG_ON(cm_id->state != IB_CM_IDLE);
|
|
cm_id->state = IB_CM_REQ_SENT;
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return 0;
|
|
|
|
error2: cm_free_msg(cm_id_priv->msg);
|
|
error1: kfree(cm_id_priv->timewait_info);
|
|
out: return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_req);
|
|
|
|
static int cm_issue_rej(struct cm_port *port,
|
|
struct ib_mad_recv_wc *mad_recv_wc,
|
|
enum ib_cm_rej_reason reason,
|
|
enum cm_msg_response msg_rejected,
|
|
void *ari, u8 ari_length)
|
|
{
|
|
struct ib_mad_send_buf *msg = NULL;
|
|
struct cm_rej_msg *rej_msg, *rcv_msg;
|
|
int ret;
|
|
|
|
ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* We just need common CM header information. Cast to any message. */
|
|
rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
|
|
rej_msg = (struct cm_rej_msg *) msg->mad;
|
|
|
|
cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
|
|
rej_msg->remote_comm_id = rcv_msg->local_comm_id;
|
|
rej_msg->local_comm_id = rcv_msg->remote_comm_id;
|
|
cm_rej_set_msg_rejected(rej_msg, msg_rejected);
|
|
rej_msg->reason = cpu_to_be16(reason);
|
|
|
|
if (ari && ari_length) {
|
|
cm_rej_set_reject_info_len(rej_msg, ari_length);
|
|
memcpy(rej_msg->ari, ari, ari_length);
|
|
}
|
|
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
cm_free_msg(msg);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline int cm_is_active_peer(__be64 local_ca_guid, __be64 remote_ca_guid,
|
|
__be32 local_qpn, __be32 remote_qpn)
|
|
{
|
|
return (be64_to_cpu(local_ca_guid) > be64_to_cpu(remote_ca_guid) ||
|
|
((local_ca_guid == remote_ca_guid) &&
|
|
(be32_to_cpu(local_qpn) > be32_to_cpu(remote_qpn))));
|
|
}
|
|
|
|
static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
|
|
struct ib_sa_path_rec *primary_path,
|
|
struct ib_sa_path_rec *alt_path)
|
|
{
|
|
memset(primary_path, 0, sizeof *primary_path);
|
|
primary_path->dgid = req_msg->primary_local_gid;
|
|
primary_path->sgid = req_msg->primary_remote_gid;
|
|
primary_path->dlid = req_msg->primary_local_lid;
|
|
primary_path->slid = req_msg->primary_remote_lid;
|
|
primary_path->flow_label = cm_req_get_primary_flow_label(req_msg);
|
|
primary_path->hop_limit = req_msg->primary_hop_limit;
|
|
primary_path->traffic_class = req_msg->primary_traffic_class;
|
|
primary_path->reversible = 1;
|
|
primary_path->pkey = req_msg->pkey;
|
|
primary_path->sl = cm_req_get_primary_sl(req_msg);
|
|
primary_path->mtu_selector = IB_SA_EQ;
|
|
primary_path->mtu = cm_req_get_path_mtu(req_msg);
|
|
primary_path->rate_selector = IB_SA_EQ;
|
|
primary_path->rate = cm_req_get_primary_packet_rate(req_msg);
|
|
primary_path->packet_life_time_selector = IB_SA_EQ;
|
|
primary_path->packet_life_time =
|
|
cm_req_get_primary_local_ack_timeout(req_msg);
|
|
primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
|
|
primary_path->service_id = req_msg->service_id;
|
|
|
|
if (req_msg->alt_local_lid) {
|
|
memset(alt_path, 0, sizeof *alt_path);
|
|
alt_path->dgid = req_msg->alt_local_gid;
|
|
alt_path->sgid = req_msg->alt_remote_gid;
|
|
alt_path->dlid = req_msg->alt_local_lid;
|
|
alt_path->slid = req_msg->alt_remote_lid;
|
|
alt_path->flow_label = cm_req_get_alt_flow_label(req_msg);
|
|
alt_path->hop_limit = req_msg->alt_hop_limit;
|
|
alt_path->traffic_class = req_msg->alt_traffic_class;
|
|
alt_path->reversible = 1;
|
|
alt_path->pkey = req_msg->pkey;
|
|
alt_path->sl = cm_req_get_alt_sl(req_msg);
|
|
alt_path->mtu_selector = IB_SA_EQ;
|
|
alt_path->mtu = cm_req_get_path_mtu(req_msg);
|
|
alt_path->rate_selector = IB_SA_EQ;
|
|
alt_path->rate = cm_req_get_alt_packet_rate(req_msg);
|
|
alt_path->packet_life_time_selector = IB_SA_EQ;
|
|
alt_path->packet_life_time =
|
|
cm_req_get_alt_local_ack_timeout(req_msg);
|
|
alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
|
|
alt_path->service_id = req_msg->service_id;
|
|
}
|
|
}
|
|
|
|
static u16 cm_get_bth_pkey(struct cm_work *work)
|
|
{
|
|
struct ib_device *ib_dev = work->port->cm_dev->ib_device;
|
|
u8 port_num = work->port->port_num;
|
|
u16 pkey_index = work->mad_recv_wc->wc->pkey_index;
|
|
u16 pkey;
|
|
int ret;
|
|
|
|
ret = ib_get_cached_pkey(ib_dev, port_num, pkey_index, &pkey);
|
|
if (ret) {
|
|
dev_warn_ratelimited(&ib_dev->dev, "ib_cm: Couldn't retrieve pkey for incoming request (port %d, pkey index %d). %d\n",
|
|
port_num, pkey_index, ret);
|
|
return 0;
|
|
}
|
|
|
|
return pkey;
|
|
}
|
|
|
|
static void cm_format_req_event(struct cm_work *work,
|
|
struct cm_id_private *cm_id_priv,
|
|
struct ib_cm_id *listen_id)
|
|
{
|
|
struct cm_req_msg *req_msg;
|
|
struct ib_cm_req_event_param *param;
|
|
|
|
req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
param = &work->cm_event.param.req_rcvd;
|
|
param->listen_id = listen_id;
|
|
param->bth_pkey = cm_get_bth_pkey(work);
|
|
param->port = cm_id_priv->av.port->port_num;
|
|
param->primary_path = &work->path[0];
|
|
if (req_msg->alt_local_lid)
|
|
param->alternate_path = &work->path[1];
|
|
else
|
|
param->alternate_path = NULL;
|
|
param->remote_ca_guid = req_msg->local_ca_guid;
|
|
param->remote_qkey = be32_to_cpu(req_msg->local_qkey);
|
|
param->remote_qpn = be32_to_cpu(cm_req_get_local_qpn(req_msg));
|
|
param->qp_type = cm_req_get_qp_type(req_msg);
|
|
param->starting_psn = be32_to_cpu(cm_req_get_starting_psn(req_msg));
|
|
param->responder_resources = cm_req_get_init_depth(req_msg);
|
|
param->initiator_depth = cm_req_get_resp_res(req_msg);
|
|
param->local_cm_response_timeout =
|
|
cm_req_get_remote_resp_timeout(req_msg);
|
|
param->flow_control = cm_req_get_flow_ctrl(req_msg);
|
|
param->remote_cm_response_timeout =
|
|
cm_req_get_local_resp_timeout(req_msg);
|
|
param->retry_count = cm_req_get_retry_count(req_msg);
|
|
param->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
|
|
param->srq = cm_req_get_srq(req_msg);
|
|
work->cm_event.private_data = &req_msg->private_data;
|
|
}
|
|
|
|
static void cm_process_work(struct cm_id_private *cm_id_priv,
|
|
struct cm_work *work)
|
|
{
|
|
int ret;
|
|
|
|
/* We will typically only have the current event to report. */
|
|
ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
|
|
cm_free_work(work);
|
|
|
|
while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) {
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
work = cm_dequeue_work(cm_id_priv);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
BUG_ON(!work);
|
|
ret = cm_id_priv->id.cm_handler(&cm_id_priv->id,
|
|
&work->cm_event);
|
|
cm_free_work(work);
|
|
}
|
|
cm_deref_id(cm_id_priv);
|
|
if (ret)
|
|
cm_destroy_id(&cm_id_priv->id, ret);
|
|
}
|
|
|
|
static void cm_format_mra(struct cm_mra_msg *mra_msg,
|
|
struct cm_id_private *cm_id_priv,
|
|
enum cm_msg_response msg_mraed, u8 service_timeout,
|
|
const void *private_data, u8 private_data_len)
|
|
{
|
|
cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid);
|
|
cm_mra_set_msg_mraed(mra_msg, msg_mraed);
|
|
mra_msg->local_comm_id = cm_id_priv->id.local_id;
|
|
mra_msg->remote_comm_id = cm_id_priv->id.remote_id;
|
|
cm_mra_set_service_timeout(mra_msg, service_timeout);
|
|
|
|
if (private_data && private_data_len)
|
|
memcpy(mra_msg->private_data, private_data, private_data_len);
|
|
}
|
|
|
|
static void cm_format_rej(struct cm_rej_msg *rej_msg,
|
|
struct cm_id_private *cm_id_priv,
|
|
enum ib_cm_rej_reason reason,
|
|
void *ari,
|
|
u8 ari_length,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
|
|
rej_msg->remote_comm_id = cm_id_priv->id.remote_id;
|
|
|
|
switch(cm_id_priv->id.state) {
|
|
case IB_CM_REQ_RCVD:
|
|
rej_msg->local_comm_id = 0;
|
|
cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
|
|
break;
|
|
case IB_CM_MRA_REQ_SENT:
|
|
rej_msg->local_comm_id = cm_id_priv->id.local_id;
|
|
cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REQ);
|
|
break;
|
|
case IB_CM_REP_RCVD:
|
|
case IB_CM_MRA_REP_SENT:
|
|
rej_msg->local_comm_id = cm_id_priv->id.local_id;
|
|
cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_REP);
|
|
break;
|
|
default:
|
|
rej_msg->local_comm_id = cm_id_priv->id.local_id;
|
|
cm_rej_set_msg_rejected(rej_msg, CM_MSG_RESPONSE_OTHER);
|
|
break;
|
|
}
|
|
|
|
rej_msg->reason = cpu_to_be16(reason);
|
|
if (ari && ari_length) {
|
|
cm_rej_set_reject_info_len(rej_msg, ari_length);
|
|
memcpy(rej_msg->ari, ari, ari_length);
|
|
}
|
|
|
|
if (private_data && private_data_len)
|
|
memcpy(rej_msg->private_data, private_data, private_data_len);
|
|
}
|
|
|
|
static void cm_dup_req_handler(struct cm_work *work,
|
|
struct cm_id_private *cm_id_priv)
|
|
{
|
|
struct ib_mad_send_buf *msg = NULL;
|
|
int ret;
|
|
|
|
atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
|
|
counter[CM_REQ_COUNTER]);
|
|
|
|
/* Quick state check to discard duplicate REQs. */
|
|
if (cm_id_priv->id.state == IB_CM_REQ_RCVD)
|
|
return;
|
|
|
|
ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
|
|
if (ret)
|
|
return;
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
switch (cm_id_priv->id.state) {
|
|
case IB_CM_MRA_REQ_SENT:
|
|
cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
|
|
CM_MSG_RESPONSE_REQ, cm_id_priv->service_timeout,
|
|
cm_id_priv->private_data,
|
|
cm_id_priv->private_data_len);
|
|
break;
|
|
case IB_CM_TIMEWAIT:
|
|
cm_format_rej((struct cm_rej_msg *) msg->mad, cm_id_priv,
|
|
IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0);
|
|
break;
|
|
default:
|
|
goto unlock;
|
|
}
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
goto free;
|
|
return;
|
|
|
|
unlock: spin_unlock_irq(&cm_id_priv->lock);
|
|
free: cm_free_msg(msg);
|
|
}
|
|
|
|
static struct cm_id_private * cm_match_req(struct cm_work *work,
|
|
struct cm_id_private *cm_id_priv)
|
|
{
|
|
struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv;
|
|
struct cm_timewait_info *timewait_info;
|
|
struct cm_req_msg *req_msg;
|
|
|
|
req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
|
|
/* Check for possible duplicate REQ. */
|
|
spin_lock_irq(&cm.lock);
|
|
timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info);
|
|
if (timewait_info) {
|
|
cur_cm_id_priv = cm_get_id(timewait_info->work.local_id,
|
|
timewait_info->work.remote_id);
|
|
spin_unlock_irq(&cm.lock);
|
|
if (cur_cm_id_priv) {
|
|
cm_dup_req_handler(work, cur_cm_id_priv);
|
|
cm_deref_id(cur_cm_id_priv);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Check for stale connections. */
|
|
timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
|
|
if (timewait_info) {
|
|
cm_cleanup_timewait(cm_id_priv->timewait_info);
|
|
spin_unlock_irq(&cm.lock);
|
|
cm_issue_rej(work->port, work->mad_recv_wc,
|
|
IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ,
|
|
NULL, 0);
|
|
return NULL;
|
|
}
|
|
|
|
/* Find matching listen request. */
|
|
listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
|
|
req_msg->service_id);
|
|
if (!listen_cm_id_priv) {
|
|
cm_cleanup_timewait(cm_id_priv->timewait_info);
|
|
spin_unlock_irq(&cm.lock);
|
|
cm_issue_rej(work->port, work->mad_recv_wc,
|
|
IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ,
|
|
NULL, 0);
|
|
goto out;
|
|
}
|
|
atomic_inc(&listen_cm_id_priv->refcount);
|
|
atomic_inc(&cm_id_priv->refcount);
|
|
cm_id_priv->id.state = IB_CM_REQ_RCVD;
|
|
atomic_inc(&cm_id_priv->work_count);
|
|
spin_unlock_irq(&cm.lock);
|
|
out:
|
|
return listen_cm_id_priv;
|
|
}
|
|
|
|
/*
|
|
* Work-around for inter-subnet connections. If the LIDs are permissive,
|
|
* we need to override the LID/SL data in the REQ with the LID information
|
|
* in the work completion.
|
|
*/
|
|
static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc)
|
|
{
|
|
if (!cm_req_get_primary_subnet_local(req_msg)) {
|
|
if (req_msg->primary_local_lid == IB_LID_PERMISSIVE) {
|
|
req_msg->primary_local_lid = cpu_to_be16(wc->slid);
|
|
cm_req_set_primary_sl(req_msg, wc->sl);
|
|
}
|
|
|
|
if (req_msg->primary_remote_lid == IB_LID_PERMISSIVE)
|
|
req_msg->primary_remote_lid = cpu_to_be16(wc->dlid_path_bits);
|
|
}
|
|
|
|
if (!cm_req_get_alt_subnet_local(req_msg)) {
|
|
if (req_msg->alt_local_lid == IB_LID_PERMISSIVE) {
|
|
req_msg->alt_local_lid = cpu_to_be16(wc->slid);
|
|
cm_req_set_alt_sl(req_msg, wc->sl);
|
|
}
|
|
|
|
if (req_msg->alt_remote_lid == IB_LID_PERMISSIVE)
|
|
req_msg->alt_remote_lid = cpu_to_be16(wc->dlid_path_bits);
|
|
}
|
|
}
|
|
|
|
static int cm_req_handler(struct cm_work *work)
|
|
{
|
|
struct ib_cm_id *cm_id;
|
|
struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
|
|
struct cm_req_msg *req_msg;
|
|
int ret;
|
|
|
|
req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
|
|
cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL);
|
|
if (IS_ERR(cm_id))
|
|
return PTR_ERR(cm_id);
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
cm_id_priv->id.remote_id = req_msg->local_comm_id;
|
|
cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
|
|
work->mad_recv_wc->recv_buf.grh,
|
|
&cm_id_priv->av);
|
|
cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
|
|
id.local_id);
|
|
if (IS_ERR(cm_id_priv->timewait_info)) {
|
|
ret = PTR_ERR(cm_id_priv->timewait_info);
|
|
goto destroy;
|
|
}
|
|
cm_id_priv->timewait_info->work.remote_id = req_msg->local_comm_id;
|
|
cm_id_priv->timewait_info->remote_ca_guid = req_msg->local_ca_guid;
|
|
cm_id_priv->timewait_info->remote_qpn = cm_req_get_local_qpn(req_msg);
|
|
|
|
listen_cm_id_priv = cm_match_req(work, cm_id_priv);
|
|
if (!listen_cm_id_priv) {
|
|
ret = -EINVAL;
|
|
kfree(cm_id_priv->timewait_info);
|
|
goto destroy;
|
|
}
|
|
|
|
cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
|
|
cm_id_priv->id.context = listen_cm_id_priv->id.context;
|
|
cm_id_priv->id.service_id = req_msg->service_id;
|
|
cm_id_priv->id.service_mask = ~cpu_to_be64(0);
|
|
|
|
cm_process_routed_req(req_msg, work->mad_recv_wc->wc);
|
|
cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
|
|
|
|
memcpy(work->path[0].dmac, cm_id_priv->av.ah_attr.dmac, ETH_ALEN);
|
|
ret = cm_init_av_by_path(&work->path[0], &cm_id_priv->av);
|
|
if (ret) {
|
|
ib_get_cached_gid(work->port->cm_dev->ib_device,
|
|
work->port->port_num, 0, &work->path[0].sgid,
|
|
NULL);
|
|
ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_GID,
|
|
&work->path[0].sgid, sizeof work->path[0].sgid,
|
|
NULL, 0);
|
|
goto rejected;
|
|
}
|
|
if (req_msg->alt_local_lid) {
|
|
ret = cm_init_av_by_path(&work->path[1], &cm_id_priv->alt_av);
|
|
if (ret) {
|
|
ib_send_cm_rej(cm_id, IB_CM_REJ_INVALID_ALT_GID,
|
|
&work->path[0].sgid,
|
|
sizeof work->path[0].sgid, NULL, 0);
|
|
goto rejected;
|
|
}
|
|
}
|
|
cm_id_priv->tid = req_msg->hdr.tid;
|
|
cm_id_priv->timeout_ms = cm_convert_to_ms(
|
|
cm_req_get_local_resp_timeout(req_msg));
|
|
cm_id_priv->max_cm_retries = cm_req_get_max_cm_retries(req_msg);
|
|
cm_id_priv->remote_qpn = cm_req_get_local_qpn(req_msg);
|
|
cm_id_priv->initiator_depth = cm_req_get_resp_res(req_msg);
|
|
cm_id_priv->responder_resources = cm_req_get_init_depth(req_msg);
|
|
cm_id_priv->path_mtu = cm_req_get_path_mtu(req_msg);
|
|
cm_id_priv->pkey = req_msg->pkey;
|
|
cm_id_priv->sq_psn = cm_req_get_starting_psn(req_msg);
|
|
cm_id_priv->retry_count = cm_req_get_retry_count(req_msg);
|
|
cm_id_priv->rnr_retry_count = cm_req_get_rnr_retry_count(req_msg);
|
|
cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
|
|
|
|
cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
|
|
cm_process_work(cm_id_priv, work);
|
|
cm_deref_id(listen_cm_id_priv);
|
|
return 0;
|
|
|
|
rejected:
|
|
atomic_dec(&cm_id_priv->refcount);
|
|
cm_deref_id(listen_cm_id_priv);
|
|
destroy:
|
|
ib_destroy_cm_id(cm_id);
|
|
return ret;
|
|
}
|
|
|
|
static void cm_format_rep(struct cm_rep_msg *rep_msg,
|
|
struct cm_id_private *cm_id_priv,
|
|
struct ib_cm_rep_param *param)
|
|
{
|
|
cm_format_mad_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid);
|
|
rep_msg->local_comm_id = cm_id_priv->id.local_id;
|
|
rep_msg->remote_comm_id = cm_id_priv->id.remote_id;
|
|
cm_rep_set_starting_psn(rep_msg, cpu_to_be32(param->starting_psn));
|
|
rep_msg->resp_resources = param->responder_resources;
|
|
cm_rep_set_target_ack_delay(rep_msg,
|
|
cm_id_priv->av.port->cm_dev->ack_delay);
|
|
cm_rep_set_failover(rep_msg, param->failover_accepted);
|
|
cm_rep_set_rnr_retry_count(rep_msg, param->rnr_retry_count);
|
|
rep_msg->local_ca_guid = cm_id_priv->id.device->node_guid;
|
|
|
|
if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) {
|
|
rep_msg->initiator_depth = param->initiator_depth;
|
|
cm_rep_set_flow_ctrl(rep_msg, param->flow_control);
|
|
cm_rep_set_srq(rep_msg, param->srq);
|
|
cm_rep_set_local_qpn(rep_msg, cpu_to_be32(param->qp_num));
|
|
} else {
|
|
cm_rep_set_srq(rep_msg, 1);
|
|
cm_rep_set_local_eecn(rep_msg, cpu_to_be32(param->qp_num));
|
|
}
|
|
|
|
if (param->private_data && param->private_data_len)
|
|
memcpy(rep_msg->private_data, param->private_data,
|
|
param->private_data_len);
|
|
}
|
|
|
|
int ib_send_cm_rep(struct ib_cm_id *cm_id,
|
|
struct ib_cm_rep_param *param)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_mad_send_buf *msg;
|
|
struct cm_rep_msg *rep_msg;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if (param->private_data &&
|
|
param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE)
|
|
return -EINVAL;
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
if (cm_id->state != IB_CM_REQ_RCVD &&
|
|
cm_id->state != IB_CM_MRA_REQ_SENT) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ret = cm_alloc_msg(cm_id_priv, &msg);
|
|
if (ret)
|
|
goto out;
|
|
|
|
rep_msg = (struct cm_rep_msg *) msg->mad;
|
|
cm_format_rep(rep_msg, cm_id_priv, param);
|
|
msg->timeout_ms = cm_id_priv->timeout_ms;
|
|
msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
|
|
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret) {
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
cm_free_msg(msg);
|
|
return ret;
|
|
}
|
|
|
|
cm_id->state = IB_CM_REP_SENT;
|
|
cm_id_priv->msg = msg;
|
|
cm_id_priv->initiator_depth = param->initiator_depth;
|
|
cm_id_priv->responder_resources = param->responder_resources;
|
|
cm_id_priv->rq_psn = cm_rep_get_starting_psn(rep_msg);
|
|
cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF);
|
|
|
|
out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_rep);
|
|
|
|
static void cm_format_rtu(struct cm_rtu_msg *rtu_msg,
|
|
struct cm_id_private *cm_id_priv,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid);
|
|
rtu_msg->local_comm_id = cm_id_priv->id.local_id;
|
|
rtu_msg->remote_comm_id = cm_id_priv->id.remote_id;
|
|
|
|
if (private_data && private_data_len)
|
|
memcpy(rtu_msg->private_data, private_data, private_data_len);
|
|
}
|
|
|
|
int ib_send_cm_rtu(struct ib_cm_id *cm_id,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_mad_send_buf *msg;
|
|
unsigned long flags;
|
|
void *data;
|
|
int ret;
|
|
|
|
if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE)
|
|
return -EINVAL;
|
|
|
|
data = cm_copy_private_data(private_data, private_data_len);
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
if (cm_id->state != IB_CM_REP_RCVD &&
|
|
cm_id->state != IB_CM_MRA_REP_SENT) {
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
ret = cm_alloc_msg(cm_id_priv, &msg);
|
|
if (ret)
|
|
goto error;
|
|
|
|
cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
|
|
private_data, private_data_len);
|
|
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret) {
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
cm_free_msg(msg);
|
|
kfree(data);
|
|
return ret;
|
|
}
|
|
|
|
cm_id->state = IB_CM_ESTABLISHED;
|
|
cm_set_private_data(cm_id_priv, data, private_data_len);
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return 0;
|
|
|
|
error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
kfree(data);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_rtu);
|
|
|
|
static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type)
|
|
{
|
|
struct cm_rep_msg *rep_msg;
|
|
struct ib_cm_rep_event_param *param;
|
|
|
|
rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
param = &work->cm_event.param.rep_rcvd;
|
|
param->remote_ca_guid = rep_msg->local_ca_guid;
|
|
param->remote_qkey = be32_to_cpu(rep_msg->local_qkey);
|
|
param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type));
|
|
param->starting_psn = be32_to_cpu(cm_rep_get_starting_psn(rep_msg));
|
|
param->responder_resources = rep_msg->initiator_depth;
|
|
param->initiator_depth = rep_msg->resp_resources;
|
|
param->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
|
|
param->failover_accepted = cm_rep_get_failover(rep_msg);
|
|
param->flow_control = cm_rep_get_flow_ctrl(rep_msg);
|
|
param->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
|
|
param->srq = cm_rep_get_srq(rep_msg);
|
|
work->cm_event.private_data = &rep_msg->private_data;
|
|
}
|
|
|
|
static void cm_dup_rep_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_rep_msg *rep_msg;
|
|
struct ib_mad_send_buf *msg = NULL;
|
|
int ret;
|
|
|
|
rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id,
|
|
rep_msg->local_comm_id);
|
|
if (!cm_id_priv)
|
|
return;
|
|
|
|
atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
|
|
counter[CM_REP_COUNTER]);
|
|
ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
|
|
if (ret)
|
|
goto deref;
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
|
|
cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
|
|
cm_id_priv->private_data,
|
|
cm_id_priv->private_data_len);
|
|
else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
|
|
cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
|
|
CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
|
|
cm_id_priv->private_data,
|
|
cm_id_priv->private_data_len);
|
|
else
|
|
goto unlock;
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
goto free;
|
|
goto deref;
|
|
|
|
unlock: spin_unlock_irq(&cm_id_priv->lock);
|
|
free: cm_free_msg(msg);
|
|
deref: cm_deref_id(cm_id_priv);
|
|
}
|
|
|
|
static int cm_rep_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_rep_msg *rep_msg;
|
|
int ret;
|
|
|
|
rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(rep_msg->remote_comm_id, 0);
|
|
if (!cm_id_priv) {
|
|
cm_dup_rep_handler(work);
|
|
return -EINVAL;
|
|
}
|
|
|
|
cm_format_rep_event(work, cm_id_priv->qp_type);
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
switch (cm_id_priv->id.state) {
|
|
case IB_CM_REQ_SENT:
|
|
case IB_CM_MRA_REQ_RCVD:
|
|
break;
|
|
default:
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
cm_id_priv->timewait_info->work.remote_id = rep_msg->local_comm_id;
|
|
cm_id_priv->timewait_info->remote_ca_guid = rep_msg->local_ca_guid;
|
|
cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
|
|
|
|
spin_lock(&cm.lock);
|
|
/* Check for duplicate REP. */
|
|
if (cm_insert_remote_id(cm_id_priv->timewait_info)) {
|
|
spin_unlock(&cm.lock);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
/* Check for a stale connection. */
|
|
if (cm_insert_remote_qpn(cm_id_priv->timewait_info)) {
|
|
rb_erase(&cm_id_priv->timewait_info->remote_id_node,
|
|
&cm.remote_id_table);
|
|
cm_id_priv->timewait_info->inserted_remote_id = 0;
|
|
spin_unlock(&cm.lock);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
cm_issue_rej(work->port, work->mad_recv_wc,
|
|
IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP,
|
|
NULL, 0);
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
spin_unlock(&cm.lock);
|
|
|
|
cm_id_priv->id.state = IB_CM_REP_RCVD;
|
|
cm_id_priv->id.remote_id = rep_msg->local_comm_id;
|
|
cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
|
|
cm_id_priv->initiator_depth = rep_msg->resp_resources;
|
|
cm_id_priv->responder_resources = rep_msg->initiator_depth;
|
|
cm_id_priv->sq_psn = cm_rep_get_starting_psn(rep_msg);
|
|
cm_id_priv->rnr_retry_count = cm_rep_get_rnr_retry_count(rep_msg);
|
|
cm_id_priv->target_ack_delay = cm_rep_get_target_ack_delay(rep_msg);
|
|
cm_id_priv->av.timeout =
|
|
cm_ack_timeout(cm_id_priv->target_ack_delay,
|
|
cm_id_priv->av.timeout - 1);
|
|
cm_id_priv->alt_av.timeout =
|
|
cm_ack_timeout(cm_id_priv->target_ack_delay,
|
|
cm_id_priv->alt_av.timeout - 1);
|
|
|
|
/* todo: handle peer_to_peer */
|
|
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
ret = atomic_inc_and_test(&cm_id_priv->work_count);
|
|
if (!ret)
|
|
list_add_tail(&work->list, &cm_id_priv->work_list);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (ret)
|
|
cm_process_work(cm_id_priv, work);
|
|
else
|
|
cm_deref_id(cm_id_priv);
|
|
return 0;
|
|
|
|
error:
|
|
cm_deref_id(cm_id_priv);
|
|
return ret;
|
|
}
|
|
|
|
static int cm_establish_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
int ret;
|
|
|
|
/* See comment in cm_establish about lookup. */
|
|
cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
|
|
if (!cm_id_priv)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
goto out;
|
|
}
|
|
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
ret = atomic_inc_and_test(&cm_id_priv->work_count);
|
|
if (!ret)
|
|
list_add_tail(&work->list, &cm_id_priv->work_list);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (ret)
|
|
cm_process_work(cm_id_priv, work);
|
|
else
|
|
cm_deref_id(cm_id_priv);
|
|
return 0;
|
|
out:
|
|
cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int cm_rtu_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_rtu_msg *rtu_msg;
|
|
int ret;
|
|
|
|
rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(rtu_msg->remote_comm_id,
|
|
rtu_msg->local_comm_id);
|
|
if (!cm_id_priv)
|
|
return -EINVAL;
|
|
|
|
work->cm_event.private_data = &rtu_msg->private_data;
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
if (cm_id_priv->id.state != IB_CM_REP_SENT &&
|
|
cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) {
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
|
|
counter[CM_RTU_COUNTER]);
|
|
goto out;
|
|
}
|
|
cm_id_priv->id.state = IB_CM_ESTABLISHED;
|
|
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
ret = atomic_inc_and_test(&cm_id_priv->work_count);
|
|
if (!ret)
|
|
list_add_tail(&work->list, &cm_id_priv->work_list);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (ret)
|
|
cm_process_work(cm_id_priv, work);
|
|
else
|
|
cm_deref_id(cm_id_priv);
|
|
return 0;
|
|
out:
|
|
cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void cm_format_dreq(struct cm_dreq_msg *dreq_msg,
|
|
struct cm_id_private *cm_id_priv,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID,
|
|
cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ));
|
|
dreq_msg->local_comm_id = cm_id_priv->id.local_id;
|
|
dreq_msg->remote_comm_id = cm_id_priv->id.remote_id;
|
|
cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn);
|
|
|
|
if (private_data && private_data_len)
|
|
memcpy(dreq_msg->private_data, private_data, private_data_len);
|
|
}
|
|
|
|
int ib_send_cm_dreq(struct ib_cm_id *cm_id,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_mad_send_buf *msg;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
|
|
return -EINVAL;
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
if (cm_id->state != IB_CM_ESTABLISHED) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (cm_id->lap_state == IB_CM_LAP_SENT ||
|
|
cm_id->lap_state == IB_CM_MRA_LAP_RCVD)
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
|
|
ret = cm_alloc_msg(cm_id_priv, &msg);
|
|
if (ret) {
|
|
cm_enter_timewait(cm_id_priv);
|
|
goto out;
|
|
}
|
|
|
|
cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv,
|
|
private_data, private_data_len);
|
|
msg->timeout_ms = cm_id_priv->timeout_ms;
|
|
msg->context[1] = (void *) (unsigned long) IB_CM_DREQ_SENT;
|
|
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret) {
|
|
cm_enter_timewait(cm_id_priv);
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
cm_free_msg(msg);
|
|
return ret;
|
|
}
|
|
|
|
cm_id->state = IB_CM_DREQ_SENT;
|
|
cm_id_priv->msg = msg;
|
|
out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_dreq);
|
|
|
|
static void cm_format_drep(struct cm_drep_msg *drep_msg,
|
|
struct cm_id_private *cm_id_priv,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid);
|
|
drep_msg->local_comm_id = cm_id_priv->id.local_id;
|
|
drep_msg->remote_comm_id = cm_id_priv->id.remote_id;
|
|
|
|
if (private_data && private_data_len)
|
|
memcpy(drep_msg->private_data, private_data, private_data_len);
|
|
}
|
|
|
|
int ib_send_cm_drep(struct ib_cm_id *cm_id,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_mad_send_buf *msg;
|
|
unsigned long flags;
|
|
void *data;
|
|
int ret;
|
|
|
|
if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
|
|
return -EINVAL;
|
|
|
|
data = cm_copy_private_data(private_data, private_data_len);
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
if (cm_id->state != IB_CM_DREQ_RCVD) {
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
kfree(data);
|
|
return -EINVAL;
|
|
}
|
|
|
|
cm_set_private_data(cm_id_priv, data, private_data_len);
|
|
cm_enter_timewait(cm_id_priv);
|
|
|
|
ret = cm_alloc_msg(cm_id_priv, &msg);
|
|
if (ret)
|
|
goto out;
|
|
|
|
cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
|
|
private_data, private_data_len);
|
|
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret) {
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
cm_free_msg(msg);
|
|
return ret;
|
|
}
|
|
|
|
out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_drep);
|
|
|
|
static int cm_issue_drep(struct cm_port *port,
|
|
struct ib_mad_recv_wc *mad_recv_wc)
|
|
{
|
|
struct ib_mad_send_buf *msg = NULL;
|
|
struct cm_dreq_msg *dreq_msg;
|
|
struct cm_drep_msg *drep_msg;
|
|
int ret;
|
|
|
|
ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad;
|
|
drep_msg = (struct cm_drep_msg *) msg->mad;
|
|
|
|
cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid);
|
|
drep_msg->remote_comm_id = dreq_msg->local_comm_id;
|
|
drep_msg->local_comm_id = dreq_msg->remote_comm_id;
|
|
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
cm_free_msg(msg);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cm_dreq_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_dreq_msg *dreq_msg;
|
|
struct ib_mad_send_buf *msg = NULL;
|
|
int ret;
|
|
|
|
dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id,
|
|
dreq_msg->local_comm_id);
|
|
if (!cm_id_priv) {
|
|
atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
|
|
counter[CM_DREQ_COUNTER]);
|
|
cm_issue_drep(work->port, work->mad_recv_wc);
|
|
return -EINVAL;
|
|
}
|
|
|
|
work->cm_event.private_data = &dreq_msg->private_data;
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
if (cm_id_priv->local_qpn != cm_dreq_get_remote_qpn(dreq_msg))
|
|
goto unlock;
|
|
|
|
switch (cm_id_priv->id.state) {
|
|
case IB_CM_REP_SENT:
|
|
case IB_CM_DREQ_SENT:
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
break;
|
|
case IB_CM_ESTABLISHED:
|
|
if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT ||
|
|
cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
break;
|
|
case IB_CM_MRA_REP_RCVD:
|
|
break;
|
|
case IB_CM_TIMEWAIT:
|
|
atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
|
|
counter[CM_DREQ_COUNTER]);
|
|
if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
|
|
goto unlock;
|
|
|
|
cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
|
|
cm_id_priv->private_data,
|
|
cm_id_priv->private_data_len);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (ib_post_send_mad(msg, NULL))
|
|
cm_free_msg(msg);
|
|
goto deref;
|
|
case IB_CM_DREQ_RCVD:
|
|
atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
|
|
counter[CM_DREQ_COUNTER]);
|
|
goto unlock;
|
|
default:
|
|
goto unlock;
|
|
}
|
|
cm_id_priv->id.state = IB_CM_DREQ_RCVD;
|
|
cm_id_priv->tid = dreq_msg->hdr.tid;
|
|
ret = atomic_inc_and_test(&cm_id_priv->work_count);
|
|
if (!ret)
|
|
list_add_tail(&work->list, &cm_id_priv->work_list);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (ret)
|
|
cm_process_work(cm_id_priv, work);
|
|
else
|
|
cm_deref_id(cm_id_priv);
|
|
return 0;
|
|
|
|
unlock: spin_unlock_irq(&cm_id_priv->lock);
|
|
deref: cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int cm_drep_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_drep_msg *drep_msg;
|
|
int ret;
|
|
|
|
drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(drep_msg->remote_comm_id,
|
|
drep_msg->local_comm_id);
|
|
if (!cm_id_priv)
|
|
return -EINVAL;
|
|
|
|
work->cm_event.private_data = &drep_msg->private_data;
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
if (cm_id_priv->id.state != IB_CM_DREQ_SENT &&
|
|
cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
goto out;
|
|
}
|
|
cm_enter_timewait(cm_id_priv);
|
|
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
ret = atomic_inc_and_test(&cm_id_priv->work_count);
|
|
if (!ret)
|
|
list_add_tail(&work->list, &cm_id_priv->work_list);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (ret)
|
|
cm_process_work(cm_id_priv, work);
|
|
else
|
|
cm_deref_id(cm_id_priv);
|
|
return 0;
|
|
out:
|
|
cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
int ib_send_cm_rej(struct ib_cm_id *cm_id,
|
|
enum ib_cm_rej_reason reason,
|
|
void *ari,
|
|
u8 ari_length,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_mad_send_buf *msg;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
|
|
(ari && ari_length > IB_CM_REJ_ARI_LENGTH))
|
|
return -EINVAL;
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
switch (cm_id->state) {
|
|
case IB_CM_REQ_SENT:
|
|
case IB_CM_MRA_REQ_RCVD:
|
|
case IB_CM_REQ_RCVD:
|
|
case IB_CM_MRA_REQ_SENT:
|
|
case IB_CM_REP_RCVD:
|
|
case IB_CM_MRA_REP_SENT:
|
|
ret = cm_alloc_msg(cm_id_priv, &msg);
|
|
if (!ret)
|
|
cm_format_rej((struct cm_rej_msg *) msg->mad,
|
|
cm_id_priv, reason, ari, ari_length,
|
|
private_data, private_data_len);
|
|
|
|
cm_reset_to_idle(cm_id_priv);
|
|
break;
|
|
case IB_CM_REP_SENT:
|
|
case IB_CM_MRA_REP_RCVD:
|
|
ret = cm_alloc_msg(cm_id_priv, &msg);
|
|
if (!ret)
|
|
cm_format_rej((struct cm_rej_msg *) msg->mad,
|
|
cm_id_priv, reason, ari, ari_length,
|
|
private_data, private_data_len);
|
|
|
|
cm_enter_timewait(cm_id_priv);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
cm_free_msg(msg);
|
|
|
|
out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_rej);
|
|
|
|
static void cm_format_rej_event(struct cm_work *work)
|
|
{
|
|
struct cm_rej_msg *rej_msg;
|
|
struct ib_cm_rej_event_param *param;
|
|
|
|
rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
param = &work->cm_event.param.rej_rcvd;
|
|
param->ari = rej_msg->ari;
|
|
param->ari_length = cm_rej_get_reject_info_len(rej_msg);
|
|
param->reason = __be16_to_cpu(rej_msg->reason);
|
|
work->cm_event.private_data = &rej_msg->private_data;
|
|
}
|
|
|
|
static struct cm_id_private * cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
|
|
{
|
|
struct cm_timewait_info *timewait_info;
|
|
struct cm_id_private *cm_id_priv;
|
|
__be32 remote_id;
|
|
|
|
remote_id = rej_msg->local_comm_id;
|
|
|
|
if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_TIMEOUT) {
|
|
spin_lock_irq(&cm.lock);
|
|
timewait_info = cm_find_remote_id( *((__be64 *) rej_msg->ari),
|
|
remote_id);
|
|
if (!timewait_info) {
|
|
spin_unlock_irq(&cm.lock);
|
|
return NULL;
|
|
}
|
|
cm_id_priv = idr_find(&cm.local_id_table, (__force int)
|
|
(timewait_info->work.local_id ^
|
|
cm.random_id_operand));
|
|
if (cm_id_priv) {
|
|
if (cm_id_priv->id.remote_id == remote_id)
|
|
atomic_inc(&cm_id_priv->refcount);
|
|
else
|
|
cm_id_priv = NULL;
|
|
}
|
|
spin_unlock_irq(&cm.lock);
|
|
} else if (cm_rej_get_msg_rejected(rej_msg) == CM_MSG_RESPONSE_REQ)
|
|
cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, 0);
|
|
else
|
|
cm_id_priv = cm_acquire_id(rej_msg->remote_comm_id, remote_id);
|
|
|
|
return cm_id_priv;
|
|
}
|
|
|
|
static int cm_rej_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_rej_msg *rej_msg;
|
|
int ret;
|
|
|
|
rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_rejected_id(rej_msg);
|
|
if (!cm_id_priv)
|
|
return -EINVAL;
|
|
|
|
cm_format_rej_event(work);
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
switch (cm_id_priv->id.state) {
|
|
case IB_CM_REQ_SENT:
|
|
case IB_CM_MRA_REQ_RCVD:
|
|
case IB_CM_REP_SENT:
|
|
case IB_CM_MRA_REP_RCVD:
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
/* fall through */
|
|
case IB_CM_REQ_RCVD:
|
|
case IB_CM_MRA_REQ_SENT:
|
|
if (__be16_to_cpu(rej_msg->reason) == IB_CM_REJ_STALE_CONN)
|
|
cm_enter_timewait(cm_id_priv);
|
|
else
|
|
cm_reset_to_idle(cm_id_priv);
|
|
break;
|
|
case IB_CM_DREQ_SENT:
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
/* fall through */
|
|
case IB_CM_REP_RCVD:
|
|
case IB_CM_MRA_REP_SENT:
|
|
cm_enter_timewait(cm_id_priv);
|
|
break;
|
|
case IB_CM_ESTABLISHED:
|
|
if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT ||
|
|
cm_id_priv->id.lap_state == IB_CM_LAP_SENT) {
|
|
if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT)
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent,
|
|
cm_id_priv->msg);
|
|
cm_enter_timewait(cm_id_priv);
|
|
break;
|
|
}
|
|
/* fall through */
|
|
default:
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ret = atomic_inc_and_test(&cm_id_priv->work_count);
|
|
if (!ret)
|
|
list_add_tail(&work->list, &cm_id_priv->work_list);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (ret)
|
|
cm_process_work(cm_id_priv, work);
|
|
else
|
|
cm_deref_id(cm_id_priv);
|
|
return 0;
|
|
out:
|
|
cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
int ib_send_cm_mra(struct ib_cm_id *cm_id,
|
|
u8 service_timeout,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_mad_send_buf *msg;
|
|
enum ib_cm_state cm_state;
|
|
enum ib_cm_lap_state lap_state;
|
|
enum cm_msg_response msg_response;
|
|
void *data;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if (private_data && private_data_len > IB_CM_MRA_PRIVATE_DATA_SIZE)
|
|
return -EINVAL;
|
|
|
|
data = cm_copy_private_data(private_data, private_data_len);
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
switch(cm_id_priv->id.state) {
|
|
case IB_CM_REQ_RCVD:
|
|
cm_state = IB_CM_MRA_REQ_SENT;
|
|
lap_state = cm_id->lap_state;
|
|
msg_response = CM_MSG_RESPONSE_REQ;
|
|
break;
|
|
case IB_CM_REP_RCVD:
|
|
cm_state = IB_CM_MRA_REP_SENT;
|
|
lap_state = cm_id->lap_state;
|
|
msg_response = CM_MSG_RESPONSE_REP;
|
|
break;
|
|
case IB_CM_ESTABLISHED:
|
|
if (cm_id->lap_state == IB_CM_LAP_RCVD) {
|
|
cm_state = cm_id->state;
|
|
lap_state = IB_CM_MRA_LAP_SENT;
|
|
msg_response = CM_MSG_RESPONSE_OTHER;
|
|
break;
|
|
}
|
|
default:
|
|
ret = -EINVAL;
|
|
goto error1;
|
|
}
|
|
|
|
if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) {
|
|
ret = cm_alloc_msg(cm_id_priv, &msg);
|
|
if (ret)
|
|
goto error1;
|
|
|
|
cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
|
|
msg_response, service_timeout,
|
|
private_data, private_data_len);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
goto error2;
|
|
}
|
|
|
|
cm_id->state = cm_state;
|
|
cm_id->lap_state = lap_state;
|
|
cm_id_priv->service_timeout = service_timeout;
|
|
cm_set_private_data(cm_id_priv, data, private_data_len);
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return 0;
|
|
|
|
error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
kfree(data);
|
|
return ret;
|
|
|
|
error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
kfree(data);
|
|
cm_free_msg(msg);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_mra);
|
|
|
|
static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
|
|
{
|
|
switch (cm_mra_get_msg_mraed(mra_msg)) {
|
|
case CM_MSG_RESPONSE_REQ:
|
|
return cm_acquire_id(mra_msg->remote_comm_id, 0);
|
|
case CM_MSG_RESPONSE_REP:
|
|
case CM_MSG_RESPONSE_OTHER:
|
|
return cm_acquire_id(mra_msg->remote_comm_id,
|
|
mra_msg->local_comm_id);
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static int cm_mra_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_mra_msg *mra_msg;
|
|
int timeout, ret;
|
|
|
|
mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_mraed_id(mra_msg);
|
|
if (!cm_id_priv)
|
|
return -EINVAL;
|
|
|
|
work->cm_event.private_data = &mra_msg->private_data;
|
|
work->cm_event.param.mra_rcvd.service_timeout =
|
|
cm_mra_get_service_timeout(mra_msg);
|
|
timeout = cm_convert_to_ms(cm_mra_get_service_timeout(mra_msg)) +
|
|
cm_convert_to_ms(cm_id_priv->av.timeout);
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
switch (cm_id_priv->id.state) {
|
|
case IB_CM_REQ_SENT:
|
|
if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REQ ||
|
|
ib_modify_mad(cm_id_priv->av.port->mad_agent,
|
|
cm_id_priv->msg, timeout))
|
|
goto out;
|
|
cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
|
|
break;
|
|
case IB_CM_REP_SENT:
|
|
if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_REP ||
|
|
ib_modify_mad(cm_id_priv->av.port->mad_agent,
|
|
cm_id_priv->msg, timeout))
|
|
goto out;
|
|
cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
|
|
break;
|
|
case IB_CM_ESTABLISHED:
|
|
if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER ||
|
|
cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
|
|
ib_modify_mad(cm_id_priv->av.port->mad_agent,
|
|
cm_id_priv->msg, timeout)) {
|
|
if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
|
|
atomic_long_inc(&work->port->
|
|
counter_group[CM_RECV_DUPLICATES].
|
|
counter[CM_MRA_COUNTER]);
|
|
goto out;
|
|
}
|
|
cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
|
|
break;
|
|
case IB_CM_MRA_REQ_RCVD:
|
|
case IB_CM_MRA_REP_RCVD:
|
|
atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
|
|
counter[CM_MRA_COUNTER]);
|
|
/* fall through */
|
|
default:
|
|
goto out;
|
|
}
|
|
|
|
cm_id_priv->msg->context[1] = (void *) (unsigned long)
|
|
cm_id_priv->id.state;
|
|
ret = atomic_inc_and_test(&cm_id_priv->work_count);
|
|
if (!ret)
|
|
list_add_tail(&work->list, &cm_id_priv->work_list);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (ret)
|
|
cm_process_work(cm_id_priv, work);
|
|
else
|
|
cm_deref_id(cm_id_priv);
|
|
return 0;
|
|
out:
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void cm_format_lap(struct cm_lap_msg *lap_msg,
|
|
struct cm_id_private *cm_id_priv,
|
|
struct ib_sa_path_rec *alternate_path,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID,
|
|
cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP));
|
|
lap_msg->local_comm_id = cm_id_priv->id.local_id;
|
|
lap_msg->remote_comm_id = cm_id_priv->id.remote_id;
|
|
cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn);
|
|
/* todo: need remote CM response timeout */
|
|
cm_lap_set_remote_resp_timeout(lap_msg, 0x1F);
|
|
lap_msg->alt_local_lid = alternate_path->slid;
|
|
lap_msg->alt_remote_lid = alternate_path->dlid;
|
|
lap_msg->alt_local_gid = alternate_path->sgid;
|
|
lap_msg->alt_remote_gid = alternate_path->dgid;
|
|
cm_lap_set_flow_label(lap_msg, alternate_path->flow_label);
|
|
cm_lap_set_traffic_class(lap_msg, alternate_path->traffic_class);
|
|
lap_msg->alt_hop_limit = alternate_path->hop_limit;
|
|
cm_lap_set_packet_rate(lap_msg, alternate_path->rate);
|
|
cm_lap_set_sl(lap_msg, alternate_path->sl);
|
|
cm_lap_set_subnet_local(lap_msg, 1); /* local only... */
|
|
cm_lap_set_local_ack_timeout(lap_msg,
|
|
cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
|
|
alternate_path->packet_life_time));
|
|
|
|
if (private_data && private_data_len)
|
|
memcpy(lap_msg->private_data, private_data, private_data_len);
|
|
}
|
|
|
|
int ib_send_cm_lap(struct ib_cm_id *cm_id,
|
|
struct ib_sa_path_rec *alternate_path,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_mad_send_buf *msg;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if (private_data && private_data_len > IB_CM_LAP_PRIVATE_DATA_SIZE)
|
|
return -EINVAL;
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
if (cm_id->state != IB_CM_ESTABLISHED ||
|
|
(cm_id->lap_state != IB_CM_LAP_UNINIT &&
|
|
cm_id->lap_state != IB_CM_LAP_IDLE)) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ret = cm_init_av_by_path(alternate_path, &cm_id_priv->alt_av);
|
|
if (ret)
|
|
goto out;
|
|
cm_id_priv->alt_av.timeout =
|
|
cm_ack_timeout(cm_id_priv->target_ack_delay,
|
|
cm_id_priv->alt_av.timeout - 1);
|
|
|
|
ret = cm_alloc_msg(cm_id_priv, &msg);
|
|
if (ret)
|
|
goto out;
|
|
|
|
cm_format_lap((struct cm_lap_msg *) msg->mad, cm_id_priv,
|
|
alternate_path, private_data, private_data_len);
|
|
msg->timeout_ms = cm_id_priv->timeout_ms;
|
|
msg->context[1] = (void *) (unsigned long) IB_CM_ESTABLISHED;
|
|
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret) {
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
cm_free_msg(msg);
|
|
return ret;
|
|
}
|
|
|
|
cm_id->lap_state = IB_CM_LAP_SENT;
|
|
cm_id_priv->msg = msg;
|
|
|
|
out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_lap);
|
|
|
|
static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv,
|
|
struct ib_sa_path_rec *path,
|
|
struct cm_lap_msg *lap_msg)
|
|
{
|
|
memset(path, 0, sizeof *path);
|
|
path->dgid = lap_msg->alt_local_gid;
|
|
path->sgid = lap_msg->alt_remote_gid;
|
|
path->dlid = lap_msg->alt_local_lid;
|
|
path->slid = lap_msg->alt_remote_lid;
|
|
path->flow_label = cm_lap_get_flow_label(lap_msg);
|
|
path->hop_limit = lap_msg->alt_hop_limit;
|
|
path->traffic_class = cm_lap_get_traffic_class(lap_msg);
|
|
path->reversible = 1;
|
|
path->pkey = cm_id_priv->pkey;
|
|
path->sl = cm_lap_get_sl(lap_msg);
|
|
path->mtu_selector = IB_SA_EQ;
|
|
path->mtu = cm_id_priv->path_mtu;
|
|
path->rate_selector = IB_SA_EQ;
|
|
path->rate = cm_lap_get_packet_rate(lap_msg);
|
|
path->packet_life_time_selector = IB_SA_EQ;
|
|
path->packet_life_time = cm_lap_get_local_ack_timeout(lap_msg);
|
|
path->packet_life_time -= (path->packet_life_time > 0);
|
|
}
|
|
|
|
static int cm_lap_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_lap_msg *lap_msg;
|
|
struct ib_cm_lap_event_param *param;
|
|
struct ib_mad_send_buf *msg = NULL;
|
|
int ret;
|
|
|
|
/* todo: verify LAP request and send reject APR if invalid. */
|
|
lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
|
|
lap_msg->local_comm_id);
|
|
if (!cm_id_priv)
|
|
return -EINVAL;
|
|
|
|
param = &work->cm_event.param.lap_rcvd;
|
|
param->alternate_path = &work->path[0];
|
|
cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg);
|
|
work->cm_event.private_data = &lap_msg->private_data;
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
|
|
goto unlock;
|
|
|
|
switch (cm_id_priv->id.lap_state) {
|
|
case IB_CM_LAP_UNINIT:
|
|
case IB_CM_LAP_IDLE:
|
|
break;
|
|
case IB_CM_MRA_LAP_SENT:
|
|
atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
|
|
counter[CM_LAP_COUNTER]);
|
|
if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
|
|
goto unlock;
|
|
|
|
cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
|
|
CM_MSG_RESPONSE_OTHER,
|
|
cm_id_priv->service_timeout,
|
|
cm_id_priv->private_data,
|
|
cm_id_priv->private_data_len);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (ib_post_send_mad(msg, NULL))
|
|
cm_free_msg(msg);
|
|
goto deref;
|
|
case IB_CM_LAP_RCVD:
|
|
atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
|
|
counter[CM_LAP_COUNTER]);
|
|
goto unlock;
|
|
default:
|
|
goto unlock;
|
|
}
|
|
|
|
cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
|
|
cm_id_priv->tid = lap_msg->hdr.tid;
|
|
cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
|
|
work->mad_recv_wc->recv_buf.grh,
|
|
&cm_id_priv->av);
|
|
cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av);
|
|
ret = atomic_inc_and_test(&cm_id_priv->work_count);
|
|
if (!ret)
|
|
list_add_tail(&work->list, &cm_id_priv->work_list);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (ret)
|
|
cm_process_work(cm_id_priv, work);
|
|
else
|
|
cm_deref_id(cm_id_priv);
|
|
return 0;
|
|
|
|
unlock: spin_unlock_irq(&cm_id_priv->lock);
|
|
deref: cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void cm_format_apr(struct cm_apr_msg *apr_msg,
|
|
struct cm_id_private *cm_id_priv,
|
|
enum ib_cm_apr_status status,
|
|
void *info,
|
|
u8 info_length,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
cm_format_mad_hdr(&apr_msg->hdr, CM_APR_ATTR_ID, cm_id_priv->tid);
|
|
apr_msg->local_comm_id = cm_id_priv->id.local_id;
|
|
apr_msg->remote_comm_id = cm_id_priv->id.remote_id;
|
|
apr_msg->ap_status = (u8) status;
|
|
|
|
if (info && info_length) {
|
|
apr_msg->info_length = info_length;
|
|
memcpy(apr_msg->info, info, info_length);
|
|
}
|
|
|
|
if (private_data && private_data_len)
|
|
memcpy(apr_msg->private_data, private_data, private_data_len);
|
|
}
|
|
|
|
int ib_send_cm_apr(struct ib_cm_id *cm_id,
|
|
enum ib_cm_apr_status status,
|
|
void *info,
|
|
u8 info_length,
|
|
const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_mad_send_buf *msg;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if ((private_data && private_data_len > IB_CM_APR_PRIVATE_DATA_SIZE) ||
|
|
(info && info_length > IB_CM_APR_INFO_LENGTH))
|
|
return -EINVAL;
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
if (cm_id->state != IB_CM_ESTABLISHED ||
|
|
(cm_id->lap_state != IB_CM_LAP_RCVD &&
|
|
cm_id->lap_state != IB_CM_MRA_LAP_SENT)) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ret = cm_alloc_msg(cm_id_priv, &msg);
|
|
if (ret)
|
|
goto out;
|
|
|
|
cm_format_apr((struct cm_apr_msg *) msg->mad, cm_id_priv, status,
|
|
info, info_length, private_data, private_data_len);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret) {
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
cm_free_msg(msg);
|
|
return ret;
|
|
}
|
|
|
|
cm_id->lap_state = IB_CM_LAP_IDLE;
|
|
out: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_apr);
|
|
|
|
static int cm_apr_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_apr_msg *apr_msg;
|
|
int ret;
|
|
|
|
apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(apr_msg->remote_comm_id,
|
|
apr_msg->local_comm_id);
|
|
if (!cm_id_priv)
|
|
return -EINVAL; /* Unmatched reply. */
|
|
|
|
work->cm_event.param.apr_rcvd.ap_status = apr_msg->ap_status;
|
|
work->cm_event.param.apr_rcvd.apr_info = &apr_msg->info;
|
|
work->cm_event.param.apr_rcvd.info_len = apr_msg->info_length;
|
|
work->cm_event.private_data = &apr_msg->private_data;
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
if (cm_id_priv->id.state != IB_CM_ESTABLISHED ||
|
|
(cm_id_priv->id.lap_state != IB_CM_LAP_SENT &&
|
|
cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) {
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
goto out;
|
|
}
|
|
cm_id_priv->id.lap_state = IB_CM_LAP_IDLE;
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
cm_id_priv->msg = NULL;
|
|
|
|
ret = atomic_inc_and_test(&cm_id_priv->work_count);
|
|
if (!ret)
|
|
list_add_tail(&work->list, &cm_id_priv->work_list);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (ret)
|
|
cm_process_work(cm_id_priv, work);
|
|
else
|
|
cm_deref_id(cm_id_priv);
|
|
return 0;
|
|
out:
|
|
cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int cm_timewait_handler(struct cm_work *work)
|
|
{
|
|
struct cm_timewait_info *timewait_info;
|
|
struct cm_id_private *cm_id_priv;
|
|
int ret;
|
|
|
|
timewait_info = (struct cm_timewait_info *)work;
|
|
spin_lock_irq(&cm.lock);
|
|
list_del(&timewait_info->list);
|
|
spin_unlock_irq(&cm.lock);
|
|
|
|
cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
|
|
timewait_info->work.remote_id);
|
|
if (!cm_id_priv)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
if (cm_id_priv->id.state != IB_CM_TIMEWAIT ||
|
|
cm_id_priv->remote_qpn != timewait_info->remote_qpn) {
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
goto out;
|
|
}
|
|
cm_id_priv->id.state = IB_CM_IDLE;
|
|
ret = atomic_inc_and_test(&cm_id_priv->work_count);
|
|
if (!ret)
|
|
list_add_tail(&work->list, &cm_id_priv->work_list);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (ret)
|
|
cm_process_work(cm_id_priv, work);
|
|
else
|
|
cm_deref_id(cm_id_priv);
|
|
return 0;
|
|
out:
|
|
cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg,
|
|
struct cm_id_private *cm_id_priv,
|
|
struct ib_cm_sidr_req_param *param)
|
|
{
|
|
cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID,
|
|
cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR));
|
|
sidr_req_msg->request_id = cm_id_priv->id.local_id;
|
|
sidr_req_msg->pkey = param->path->pkey;
|
|
sidr_req_msg->service_id = param->service_id;
|
|
|
|
if (param->private_data && param->private_data_len)
|
|
memcpy(sidr_req_msg->private_data, param->private_data,
|
|
param->private_data_len);
|
|
}
|
|
|
|
int ib_send_cm_sidr_req(struct ib_cm_id *cm_id,
|
|
struct ib_cm_sidr_req_param *param)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_mad_send_buf *msg;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if (!param->path || (param->private_data &&
|
|
param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE))
|
|
return -EINVAL;
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
ret = cm_init_av_by_path(param->path, &cm_id_priv->av);
|
|
if (ret)
|
|
goto out;
|
|
|
|
cm_id->service_id = param->service_id;
|
|
cm_id->service_mask = ~cpu_to_be64(0);
|
|
cm_id_priv->timeout_ms = param->timeout_ms;
|
|
cm_id_priv->max_cm_retries = param->max_cm_retries;
|
|
ret = cm_alloc_msg(cm_id_priv, &msg);
|
|
if (ret)
|
|
goto out;
|
|
|
|
cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
|
|
param);
|
|
msg->timeout_ms = cm_id_priv->timeout_ms;
|
|
msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
if (cm_id->state == IB_CM_IDLE)
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
else
|
|
ret = -EINVAL;
|
|
|
|
if (ret) {
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
cm_free_msg(msg);
|
|
goto out;
|
|
}
|
|
cm_id->state = IB_CM_SIDR_REQ_SENT;
|
|
cm_id_priv->msg = msg;
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
out:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_sidr_req);
|
|
|
|
static void cm_format_sidr_req_event(struct cm_work *work,
|
|
struct ib_cm_id *listen_id)
|
|
{
|
|
struct cm_sidr_req_msg *sidr_req_msg;
|
|
struct ib_cm_sidr_req_event_param *param;
|
|
|
|
sidr_req_msg = (struct cm_sidr_req_msg *)
|
|
work->mad_recv_wc->recv_buf.mad;
|
|
param = &work->cm_event.param.sidr_req_rcvd;
|
|
param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
|
|
param->listen_id = listen_id;
|
|
param->service_id = sidr_req_msg->service_id;
|
|
param->bth_pkey = cm_get_bth_pkey(work);
|
|
param->port = work->port->port_num;
|
|
work->cm_event.private_data = &sidr_req_msg->private_data;
|
|
}
|
|
|
|
static int cm_sidr_req_handler(struct cm_work *work)
|
|
{
|
|
struct ib_cm_id *cm_id;
|
|
struct cm_id_private *cm_id_priv, *cur_cm_id_priv;
|
|
struct cm_sidr_req_msg *sidr_req_msg;
|
|
struct ib_wc *wc;
|
|
|
|
cm_id = ib_create_cm_id(work->port->cm_dev->ib_device, NULL, NULL);
|
|
if (IS_ERR(cm_id))
|
|
return PTR_ERR(cm_id);
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
|
|
/* Record SGID/SLID and request ID for lookup. */
|
|
sidr_req_msg = (struct cm_sidr_req_msg *)
|
|
work->mad_recv_wc->recv_buf.mad;
|
|
wc = work->mad_recv_wc->wc;
|
|
cm_id_priv->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
|
|
cm_id_priv->av.dgid.global.interface_id = 0;
|
|
cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
|
|
work->mad_recv_wc->recv_buf.grh,
|
|
&cm_id_priv->av);
|
|
cm_id_priv->id.remote_id = sidr_req_msg->request_id;
|
|
cm_id_priv->tid = sidr_req_msg->hdr.tid;
|
|
atomic_inc(&cm_id_priv->work_count);
|
|
|
|
spin_lock_irq(&cm.lock);
|
|
cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
|
|
if (cur_cm_id_priv) {
|
|
spin_unlock_irq(&cm.lock);
|
|
atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
|
|
counter[CM_SIDR_REQ_COUNTER]);
|
|
goto out; /* Duplicate message. */
|
|
}
|
|
cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
|
|
cur_cm_id_priv = cm_find_listen(cm_id->device,
|
|
sidr_req_msg->service_id);
|
|
if (!cur_cm_id_priv) {
|
|
spin_unlock_irq(&cm.lock);
|
|
cm_reject_sidr_req(cm_id_priv, IB_SIDR_UNSUPPORTED);
|
|
goto out; /* No match. */
|
|
}
|
|
atomic_inc(&cur_cm_id_priv->refcount);
|
|
atomic_inc(&cm_id_priv->refcount);
|
|
spin_unlock_irq(&cm.lock);
|
|
|
|
cm_id_priv->id.cm_handler = cur_cm_id_priv->id.cm_handler;
|
|
cm_id_priv->id.context = cur_cm_id_priv->id.context;
|
|
cm_id_priv->id.service_id = sidr_req_msg->service_id;
|
|
cm_id_priv->id.service_mask = ~cpu_to_be64(0);
|
|
|
|
cm_format_sidr_req_event(work, &cur_cm_id_priv->id);
|
|
cm_process_work(cm_id_priv, work);
|
|
cm_deref_id(cur_cm_id_priv);
|
|
return 0;
|
|
out:
|
|
ib_destroy_cm_id(&cm_id_priv->id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg,
|
|
struct cm_id_private *cm_id_priv,
|
|
struct ib_cm_sidr_rep_param *param)
|
|
{
|
|
cm_format_mad_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
|
|
cm_id_priv->tid);
|
|
sidr_rep_msg->request_id = cm_id_priv->id.remote_id;
|
|
sidr_rep_msg->status = param->status;
|
|
cm_sidr_rep_set_qpn(sidr_rep_msg, cpu_to_be32(param->qp_num));
|
|
sidr_rep_msg->service_id = cm_id_priv->id.service_id;
|
|
sidr_rep_msg->qkey = cpu_to_be32(param->qkey);
|
|
|
|
if (param->info && param->info_length)
|
|
memcpy(sidr_rep_msg->info, param->info, param->info_length);
|
|
|
|
if (param->private_data && param->private_data_len)
|
|
memcpy(sidr_rep_msg->private_data, param->private_data,
|
|
param->private_data_len);
|
|
}
|
|
|
|
int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id,
|
|
struct ib_cm_sidr_rep_param *param)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_mad_send_buf *msg;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) ||
|
|
(param->private_data &&
|
|
param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE))
|
|
return -EINVAL;
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
if (cm_id->state != IB_CM_SIDR_REQ_RCVD) {
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
ret = cm_alloc_msg(cm_id_priv, &msg);
|
|
if (ret)
|
|
goto error;
|
|
|
|
cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
|
|
param);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret) {
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
cm_free_msg(msg);
|
|
return ret;
|
|
}
|
|
cm_id->state = IB_CM_IDLE;
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
|
|
spin_lock_irqsave(&cm.lock, flags);
|
|
if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) {
|
|
rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
|
|
RB_CLEAR_NODE(&cm_id_priv->sidr_id_node);
|
|
}
|
|
spin_unlock_irqrestore(&cm.lock, flags);
|
|
return 0;
|
|
|
|
error: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_sidr_rep);
|
|
|
|
static void cm_format_sidr_rep_event(struct cm_work *work)
|
|
{
|
|
struct cm_sidr_rep_msg *sidr_rep_msg;
|
|
struct ib_cm_sidr_rep_event_param *param;
|
|
|
|
sidr_rep_msg = (struct cm_sidr_rep_msg *)
|
|
work->mad_recv_wc->recv_buf.mad;
|
|
param = &work->cm_event.param.sidr_rep_rcvd;
|
|
param->status = sidr_rep_msg->status;
|
|
param->qkey = be32_to_cpu(sidr_rep_msg->qkey);
|
|
param->qpn = be32_to_cpu(cm_sidr_rep_get_qpn(sidr_rep_msg));
|
|
param->info = &sidr_rep_msg->info;
|
|
param->info_len = sidr_rep_msg->info_length;
|
|
work->cm_event.private_data = &sidr_rep_msg->private_data;
|
|
}
|
|
|
|
static int cm_sidr_rep_handler(struct cm_work *work)
|
|
{
|
|
struct cm_sidr_rep_msg *sidr_rep_msg;
|
|
struct cm_id_private *cm_id_priv;
|
|
|
|
sidr_rep_msg = (struct cm_sidr_rep_msg *)
|
|
work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(sidr_rep_msg->request_id, 0);
|
|
if (!cm_id_priv)
|
|
return -EINVAL; /* Unmatched reply. */
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) {
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
goto out;
|
|
}
|
|
cm_id_priv->id.state = IB_CM_IDLE;
|
|
ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
cm_format_sidr_rep_event(work);
|
|
cm_process_work(cm_id_priv, work);
|
|
return 0;
|
|
out:
|
|
cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void cm_process_send_error(struct ib_mad_send_buf *msg,
|
|
enum ib_wc_status wc_status)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_cm_event cm_event;
|
|
enum ib_cm_state state;
|
|
int ret;
|
|
|
|
memset(&cm_event, 0, sizeof cm_event);
|
|
cm_id_priv = msg->context[0];
|
|
|
|
/* Discard old sends or ones without a response. */
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
state = (enum ib_cm_state) (unsigned long) msg->context[1];
|
|
if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
|
|
goto discard;
|
|
|
|
switch (state) {
|
|
case IB_CM_REQ_SENT:
|
|
case IB_CM_MRA_REQ_RCVD:
|
|
cm_reset_to_idle(cm_id_priv);
|
|
cm_event.event = IB_CM_REQ_ERROR;
|
|
break;
|
|
case IB_CM_REP_SENT:
|
|
case IB_CM_MRA_REP_RCVD:
|
|
cm_reset_to_idle(cm_id_priv);
|
|
cm_event.event = IB_CM_REP_ERROR;
|
|
break;
|
|
case IB_CM_DREQ_SENT:
|
|
cm_enter_timewait(cm_id_priv);
|
|
cm_event.event = IB_CM_DREQ_ERROR;
|
|
break;
|
|
case IB_CM_SIDR_REQ_SENT:
|
|
cm_id_priv->id.state = IB_CM_IDLE;
|
|
cm_event.event = IB_CM_SIDR_REQ_ERROR;
|
|
break;
|
|
default:
|
|
goto discard;
|
|
}
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
cm_event.param.send_status = wc_status;
|
|
|
|
/* No other events can occur on the cm_id at this point. */
|
|
ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
|
|
cm_free_msg(msg);
|
|
if (ret)
|
|
ib_destroy_cm_id(&cm_id_priv->id);
|
|
return;
|
|
discard:
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
cm_free_msg(msg);
|
|
}
|
|
|
|
static void cm_send_handler(struct ib_mad_agent *mad_agent,
|
|
struct ib_mad_send_wc *mad_send_wc)
|
|
{
|
|
struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
|
|
struct cm_port *port;
|
|
u16 attr_index;
|
|
|
|
port = mad_agent->context;
|
|
attr_index = be16_to_cpu(((struct ib_mad_hdr *)
|
|
msg->mad)->attr_id) - CM_ATTR_ID_OFFSET;
|
|
|
|
/*
|
|
* If the send was in response to a received message (context[0] is not
|
|
* set to a cm_id), and is not a REJ, then it is a send that was
|
|
* manually retried.
|
|
*/
|
|
if (!msg->context[0] && (attr_index != CM_REJ_COUNTER))
|
|
msg->retries = 1;
|
|
|
|
atomic_long_add(1 + msg->retries,
|
|
&port->counter_group[CM_XMIT].counter[attr_index]);
|
|
if (msg->retries)
|
|
atomic_long_add(msg->retries,
|
|
&port->counter_group[CM_XMIT_RETRIES].
|
|
counter[attr_index]);
|
|
|
|
switch (mad_send_wc->status) {
|
|
case IB_WC_SUCCESS:
|
|
case IB_WC_WR_FLUSH_ERR:
|
|
cm_free_msg(msg);
|
|
break;
|
|
default:
|
|
if (msg->context[0] && msg->context[1])
|
|
cm_process_send_error(msg, mad_send_wc->status);
|
|
else
|
|
cm_free_msg(msg);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void cm_work_handler(struct work_struct *_work)
|
|
{
|
|
struct cm_work *work = container_of(_work, struct cm_work, work.work);
|
|
int ret;
|
|
|
|
switch (work->cm_event.event) {
|
|
case IB_CM_REQ_RECEIVED:
|
|
ret = cm_req_handler(work);
|
|
break;
|
|
case IB_CM_MRA_RECEIVED:
|
|
ret = cm_mra_handler(work);
|
|
break;
|
|
case IB_CM_REJ_RECEIVED:
|
|
ret = cm_rej_handler(work);
|
|
break;
|
|
case IB_CM_REP_RECEIVED:
|
|
ret = cm_rep_handler(work);
|
|
break;
|
|
case IB_CM_RTU_RECEIVED:
|
|
ret = cm_rtu_handler(work);
|
|
break;
|
|
case IB_CM_USER_ESTABLISHED:
|
|
ret = cm_establish_handler(work);
|
|
break;
|
|
case IB_CM_DREQ_RECEIVED:
|
|
ret = cm_dreq_handler(work);
|
|
break;
|
|
case IB_CM_DREP_RECEIVED:
|
|
ret = cm_drep_handler(work);
|
|
break;
|
|
case IB_CM_SIDR_REQ_RECEIVED:
|
|
ret = cm_sidr_req_handler(work);
|
|
break;
|
|
case IB_CM_SIDR_REP_RECEIVED:
|
|
ret = cm_sidr_rep_handler(work);
|
|
break;
|
|
case IB_CM_LAP_RECEIVED:
|
|
ret = cm_lap_handler(work);
|
|
break;
|
|
case IB_CM_APR_RECEIVED:
|
|
ret = cm_apr_handler(work);
|
|
break;
|
|
case IB_CM_TIMEWAIT_EXIT:
|
|
ret = cm_timewait_handler(work);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
if (ret)
|
|
cm_free_work(work);
|
|
}
|
|
|
|
static int cm_establish(struct ib_cm_id *cm_id)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_work *work;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
struct cm_device *cm_dev;
|
|
|
|
cm_dev = ib_get_client_data(cm_id->device, &cm_client);
|
|
if (!cm_dev)
|
|
return -ENODEV;
|
|
|
|
work = kmalloc(sizeof *work, GFP_ATOMIC);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
switch (cm_id->state)
|
|
{
|
|
case IB_CM_REP_SENT:
|
|
case IB_CM_MRA_REP_RCVD:
|
|
cm_id->state = IB_CM_ESTABLISHED;
|
|
break;
|
|
case IB_CM_ESTABLISHED:
|
|
ret = -EISCONN;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
|
|
if (ret) {
|
|
kfree(work);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* The CM worker thread may try to destroy the cm_id before it
|
|
* can execute this work item. To prevent potential deadlock,
|
|
* we need to find the cm_id once we're in the context of the
|
|
* worker thread, rather than holding a reference on it.
|
|
*/
|
|
INIT_DELAYED_WORK(&work->work, cm_work_handler);
|
|
work->local_id = cm_id->local_id;
|
|
work->remote_id = cm_id->remote_id;
|
|
work->mad_recv_wc = NULL;
|
|
work->cm_event.event = IB_CM_USER_ESTABLISHED;
|
|
|
|
/* Check if the device started its remove_one */
|
|
spin_lock_irq(&cm.lock);
|
|
if (!cm_dev->going_down) {
|
|
queue_delayed_work(cm.wq, &work->work, 0);
|
|
} else {
|
|
kfree(work);
|
|
ret = -ENODEV;
|
|
}
|
|
spin_unlock_irq(&cm.lock);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int cm_migrate(struct ib_cm_id *cm_id)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
if (cm_id->state == IB_CM_ESTABLISHED &&
|
|
(cm_id->lap_state == IB_CM_LAP_UNINIT ||
|
|
cm_id->lap_state == IB_CM_LAP_IDLE)) {
|
|
cm_id->lap_state = IB_CM_LAP_IDLE;
|
|
cm_id_priv->av = cm_id_priv->alt_av;
|
|
} else
|
|
ret = -EINVAL;
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event)
|
|
{
|
|
int ret;
|
|
|
|
switch (event) {
|
|
case IB_EVENT_COMM_EST:
|
|
ret = cm_establish(cm_id);
|
|
break;
|
|
case IB_EVENT_PATH_MIG:
|
|
ret = cm_migrate(cm_id);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_cm_notify);
|
|
|
|
static void cm_recv_handler(struct ib_mad_agent *mad_agent,
|
|
struct ib_mad_recv_wc *mad_recv_wc)
|
|
{
|
|
struct cm_port *port = mad_agent->context;
|
|
struct cm_work *work;
|
|
enum ib_cm_event_type event;
|
|
u16 attr_id;
|
|
int paths = 0;
|
|
int going_down = 0;
|
|
|
|
switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) {
|
|
case CM_REQ_ATTR_ID:
|
|
paths = 1 + (((struct cm_req_msg *) mad_recv_wc->recv_buf.mad)->
|
|
alt_local_lid != 0);
|
|
event = IB_CM_REQ_RECEIVED;
|
|
break;
|
|
case CM_MRA_ATTR_ID:
|
|
event = IB_CM_MRA_RECEIVED;
|
|
break;
|
|
case CM_REJ_ATTR_ID:
|
|
event = IB_CM_REJ_RECEIVED;
|
|
break;
|
|
case CM_REP_ATTR_ID:
|
|
event = IB_CM_REP_RECEIVED;
|
|
break;
|
|
case CM_RTU_ATTR_ID:
|
|
event = IB_CM_RTU_RECEIVED;
|
|
break;
|
|
case CM_DREQ_ATTR_ID:
|
|
event = IB_CM_DREQ_RECEIVED;
|
|
break;
|
|
case CM_DREP_ATTR_ID:
|
|
event = IB_CM_DREP_RECEIVED;
|
|
break;
|
|
case CM_SIDR_REQ_ATTR_ID:
|
|
event = IB_CM_SIDR_REQ_RECEIVED;
|
|
break;
|
|
case CM_SIDR_REP_ATTR_ID:
|
|
event = IB_CM_SIDR_REP_RECEIVED;
|
|
break;
|
|
case CM_LAP_ATTR_ID:
|
|
paths = 1;
|
|
event = IB_CM_LAP_RECEIVED;
|
|
break;
|
|
case CM_APR_ATTR_ID:
|
|
event = IB_CM_APR_RECEIVED;
|
|
break;
|
|
default:
|
|
ib_free_recv_mad(mad_recv_wc);
|
|
return;
|
|
}
|
|
|
|
attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id);
|
|
atomic_long_inc(&port->counter_group[CM_RECV].
|
|
counter[attr_id - CM_ATTR_ID_OFFSET]);
|
|
|
|
work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths,
|
|
GFP_KERNEL);
|
|
if (!work) {
|
|
ib_free_recv_mad(mad_recv_wc);
|
|
return;
|
|
}
|
|
|
|
INIT_DELAYED_WORK(&work->work, cm_work_handler);
|
|
work->cm_event.event = event;
|
|
work->mad_recv_wc = mad_recv_wc;
|
|
work->port = port;
|
|
|
|
/* Check if the device started its remove_one */
|
|
spin_lock_irq(&cm.lock);
|
|
if (!port->cm_dev->going_down)
|
|
queue_delayed_work(cm.wq, &work->work, 0);
|
|
else
|
|
going_down = 1;
|
|
spin_unlock_irq(&cm.lock);
|
|
|
|
if (going_down) {
|
|
kfree(work);
|
|
ib_free_recv_mad(mad_recv_wc);
|
|
}
|
|
}
|
|
|
|
static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv,
|
|
struct ib_qp_attr *qp_attr,
|
|
int *qp_attr_mask)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
switch (cm_id_priv->id.state) {
|
|
case IB_CM_REQ_SENT:
|
|
case IB_CM_MRA_REQ_RCVD:
|
|
case IB_CM_REQ_RCVD:
|
|
case IB_CM_MRA_REQ_SENT:
|
|
case IB_CM_REP_RCVD:
|
|
case IB_CM_MRA_REP_SENT:
|
|
case IB_CM_REP_SENT:
|
|
case IB_CM_MRA_REP_RCVD:
|
|
case IB_CM_ESTABLISHED:
|
|
*qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS |
|
|
IB_QP_PKEY_INDEX | IB_QP_PORT;
|
|
qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE;
|
|
if (cm_id_priv->responder_resources)
|
|
qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ |
|
|
IB_ACCESS_REMOTE_ATOMIC;
|
|
qp_attr->pkey_index = cm_id_priv->av.pkey_index;
|
|
qp_attr->port_num = cm_id_priv->av.port->port_num;
|
|
ret = 0;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
|
|
struct ib_qp_attr *qp_attr,
|
|
int *qp_attr_mask)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
switch (cm_id_priv->id.state) {
|
|
case IB_CM_REQ_RCVD:
|
|
case IB_CM_MRA_REQ_SENT:
|
|
case IB_CM_REP_RCVD:
|
|
case IB_CM_MRA_REP_SENT:
|
|
case IB_CM_REP_SENT:
|
|
case IB_CM_MRA_REP_RCVD:
|
|
case IB_CM_ESTABLISHED:
|
|
*qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU |
|
|
IB_QP_DEST_QPN | IB_QP_RQ_PSN;
|
|
qp_attr->ah_attr = cm_id_priv->av.ah_attr;
|
|
qp_attr->path_mtu = cm_id_priv->path_mtu;
|
|
qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn);
|
|
qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn);
|
|
if (cm_id_priv->qp_type == IB_QPT_RC ||
|
|
cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
|
|
*qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC |
|
|
IB_QP_MIN_RNR_TIMER;
|
|
qp_attr->max_dest_rd_atomic =
|
|
cm_id_priv->responder_resources;
|
|
qp_attr->min_rnr_timer = 0;
|
|
}
|
|
if (cm_id_priv->alt_av.ah_attr.dlid) {
|
|
*qp_attr_mask |= IB_QP_ALT_PATH;
|
|
qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
|
|
qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
|
|
qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
|
|
qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
|
|
}
|
|
ret = 0;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
|
|
struct ib_qp_attr *qp_attr,
|
|
int *qp_attr_mask)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
switch (cm_id_priv->id.state) {
|
|
/* Allow transition to RTS before sending REP */
|
|
case IB_CM_REQ_RCVD:
|
|
case IB_CM_MRA_REQ_SENT:
|
|
|
|
case IB_CM_REP_RCVD:
|
|
case IB_CM_MRA_REP_SENT:
|
|
case IB_CM_REP_SENT:
|
|
case IB_CM_MRA_REP_RCVD:
|
|
case IB_CM_ESTABLISHED:
|
|
if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
|
|
*qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN;
|
|
qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn);
|
|
switch (cm_id_priv->qp_type) {
|
|
case IB_QPT_RC:
|
|
case IB_QPT_XRC_INI:
|
|
*qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY |
|
|
IB_QP_MAX_QP_RD_ATOMIC;
|
|
qp_attr->retry_cnt = cm_id_priv->retry_count;
|
|
qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
|
|
qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
|
|
/* fall through */
|
|
case IB_QPT_XRC_TGT:
|
|
*qp_attr_mask |= IB_QP_TIMEOUT;
|
|
qp_attr->timeout = cm_id_priv->av.timeout;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (cm_id_priv->alt_av.ah_attr.dlid) {
|
|
*qp_attr_mask |= IB_QP_PATH_MIG_STATE;
|
|
qp_attr->path_mig_state = IB_MIG_REARM;
|
|
}
|
|
} else {
|
|
*qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE;
|
|
qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
|
|
qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index;
|
|
qp_attr->alt_timeout = cm_id_priv->alt_av.timeout;
|
|
qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
|
|
qp_attr->path_mig_state = IB_MIG_REARM;
|
|
}
|
|
ret = 0;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
int ib_cm_init_qp_attr(struct ib_cm_id *cm_id,
|
|
struct ib_qp_attr *qp_attr,
|
|
int *qp_attr_mask)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
int ret;
|
|
|
|
cm_id_priv = container_of(cm_id, struct cm_id_private, id);
|
|
switch (qp_attr->qp_state) {
|
|
case IB_QPS_INIT:
|
|
ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask);
|
|
break;
|
|
case IB_QPS_RTR:
|
|
ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask);
|
|
break;
|
|
case IB_QPS_RTS:
|
|
ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_cm_init_qp_attr);
|
|
|
|
static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct cm_counter_group *group;
|
|
struct cm_counter_attribute *cm_attr;
|
|
|
|
group = container_of(obj, struct cm_counter_group, obj);
|
|
cm_attr = container_of(attr, struct cm_counter_attribute, attr);
|
|
|
|
return sprintf(buf, "%ld\n",
|
|
atomic_long_read(&group->counter[cm_attr->index]));
|
|
}
|
|
|
|
static const struct sysfs_ops cm_counter_ops = {
|
|
.show = cm_show_counter
|
|
};
|
|
|
|
static struct kobj_type cm_counter_obj_type = {
|
|
.sysfs_ops = &cm_counter_ops,
|
|
.default_attrs = cm_counter_default_attrs
|
|
};
|
|
|
|
static void cm_release_port_obj(struct kobject *obj)
|
|
{
|
|
struct cm_port *cm_port;
|
|
|
|
cm_port = container_of(obj, struct cm_port, port_obj);
|
|
kfree(cm_port);
|
|
}
|
|
|
|
static struct kobj_type cm_port_obj_type = {
|
|
.release = cm_release_port_obj
|
|
};
|
|
|
|
static char *cm_devnode(struct device *dev, umode_t *mode)
|
|
{
|
|
if (mode)
|
|
*mode = 0666;
|
|
return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev));
|
|
}
|
|
|
|
struct class cm_class = {
|
|
.owner = THIS_MODULE,
|
|
.name = "infiniband_cm",
|
|
.devnode = cm_devnode,
|
|
};
|
|
EXPORT_SYMBOL(cm_class);
|
|
|
|
static int cm_create_port_fs(struct cm_port *port)
|
|
{
|
|
int i, ret;
|
|
|
|
ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type,
|
|
&port->cm_dev->device->kobj,
|
|
"%d", port->port_num);
|
|
if (ret) {
|
|
kfree(port);
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < CM_COUNTER_GROUPS; i++) {
|
|
ret = kobject_init_and_add(&port->counter_group[i].obj,
|
|
&cm_counter_obj_type,
|
|
&port->port_obj,
|
|
"%s", counter_group_names[i]);
|
|
if (ret)
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
while (i--)
|
|
kobject_put(&port->counter_group[i].obj);
|
|
kobject_put(&port->port_obj);
|
|
return ret;
|
|
|
|
}
|
|
|
|
static void cm_remove_port_fs(struct cm_port *port)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < CM_COUNTER_GROUPS; i++)
|
|
kobject_put(&port->counter_group[i].obj);
|
|
|
|
kobject_put(&port->port_obj);
|
|
}
|
|
|
|
static void cm_add_one(struct ib_device *ib_device)
|
|
{
|
|
struct cm_device *cm_dev;
|
|
struct cm_port *port;
|
|
struct ib_mad_reg_req reg_req = {
|
|
.mgmt_class = IB_MGMT_CLASS_CM,
|
|
.mgmt_class_version = IB_CM_CLASS_VERSION,
|
|
};
|
|
struct ib_port_modify port_modify = {
|
|
.set_port_cap_mask = IB_PORT_CM_SUP
|
|
};
|
|
unsigned long flags;
|
|
int ret;
|
|
int count = 0;
|
|
u8 i;
|
|
|
|
cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) *
|
|
ib_device->phys_port_cnt, GFP_KERNEL);
|
|
if (!cm_dev)
|
|
return;
|
|
|
|
cm_dev->ib_device = ib_device;
|
|
cm_dev->ack_delay = ib_device->attrs.local_ca_ack_delay;
|
|
cm_dev->going_down = 0;
|
|
cm_dev->device = device_create(&cm_class, &ib_device->dev,
|
|
MKDEV(0, 0), NULL,
|
|
"%s", ib_device->name);
|
|
if (IS_ERR(cm_dev->device)) {
|
|
kfree(cm_dev);
|
|
return;
|
|
}
|
|
|
|
set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
|
|
for (i = 1; i <= ib_device->phys_port_cnt; i++) {
|
|
if (!rdma_cap_ib_cm(ib_device, i))
|
|
continue;
|
|
|
|
port = kzalloc(sizeof *port, GFP_KERNEL);
|
|
if (!port)
|
|
goto error1;
|
|
|
|
cm_dev->port[i-1] = port;
|
|
port->cm_dev = cm_dev;
|
|
port->port_num = i;
|
|
|
|
ret = cm_create_port_fs(port);
|
|
if (ret)
|
|
goto error1;
|
|
|
|
port->mad_agent = ib_register_mad_agent(ib_device, i,
|
|
IB_QPT_GSI,
|
|
®_req,
|
|
0,
|
|
cm_send_handler,
|
|
cm_recv_handler,
|
|
port,
|
|
0);
|
|
if (IS_ERR(port->mad_agent))
|
|
goto error2;
|
|
|
|
ret = ib_modify_port(ib_device, i, 0, &port_modify);
|
|
if (ret)
|
|
goto error3;
|
|
|
|
count++;
|
|
}
|
|
|
|
if (!count)
|
|
goto free;
|
|
|
|
ib_set_client_data(ib_device, &cm_client, cm_dev);
|
|
|
|
write_lock_irqsave(&cm.device_lock, flags);
|
|
list_add_tail(&cm_dev->list, &cm.device_list);
|
|
write_unlock_irqrestore(&cm.device_lock, flags);
|
|
return;
|
|
|
|
error3:
|
|
ib_unregister_mad_agent(port->mad_agent);
|
|
error2:
|
|
cm_remove_port_fs(port);
|
|
error1:
|
|
port_modify.set_port_cap_mask = 0;
|
|
port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
|
|
while (--i) {
|
|
if (!rdma_cap_ib_cm(ib_device, i))
|
|
continue;
|
|
|
|
port = cm_dev->port[i-1];
|
|
ib_modify_port(ib_device, port->port_num, 0, &port_modify);
|
|
ib_unregister_mad_agent(port->mad_agent);
|
|
cm_remove_port_fs(port);
|
|
}
|
|
free:
|
|
device_unregister(cm_dev->device);
|
|
kfree(cm_dev);
|
|
}
|
|
|
|
static void cm_remove_one(struct ib_device *ib_device, void *client_data)
|
|
{
|
|
struct cm_device *cm_dev = client_data;
|
|
struct cm_port *port;
|
|
struct ib_port_modify port_modify = {
|
|
.clr_port_cap_mask = IB_PORT_CM_SUP
|
|
};
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
if (!cm_dev)
|
|
return;
|
|
|
|
write_lock_irqsave(&cm.device_lock, flags);
|
|
list_del(&cm_dev->list);
|
|
write_unlock_irqrestore(&cm.device_lock, flags);
|
|
|
|
spin_lock_irq(&cm.lock);
|
|
cm_dev->going_down = 1;
|
|
spin_unlock_irq(&cm.lock);
|
|
|
|
for (i = 1; i <= ib_device->phys_port_cnt; i++) {
|
|
if (!rdma_cap_ib_cm(ib_device, i))
|
|
continue;
|
|
|
|
port = cm_dev->port[i-1];
|
|
ib_modify_port(ib_device, port->port_num, 0, &port_modify);
|
|
/*
|
|
* We flush the queue here after the going_down set, this
|
|
* verify that no new works will be queued in the recv handler,
|
|
* after that we can call the unregister_mad_agent
|
|
*/
|
|
flush_workqueue(cm.wq);
|
|
ib_unregister_mad_agent(port->mad_agent);
|
|
cm_remove_port_fs(port);
|
|
}
|
|
device_unregister(cm_dev->device);
|
|
kfree(cm_dev);
|
|
}
|
|
|
|
static int __init ib_cm_init(void)
|
|
{
|
|
int ret;
|
|
|
|
memset(&cm, 0, sizeof cm);
|
|
INIT_LIST_HEAD(&cm.device_list);
|
|
rwlock_init(&cm.device_lock);
|
|
spin_lock_init(&cm.lock);
|
|
cm.listen_service_table = RB_ROOT;
|
|
cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID);
|
|
cm.remote_id_table = RB_ROOT;
|
|
cm.remote_qp_table = RB_ROOT;
|
|
cm.remote_sidr_table = RB_ROOT;
|
|
idr_init(&cm.local_id_table);
|
|
get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
|
|
INIT_LIST_HEAD(&cm.timewait_list);
|
|
|
|
ret = class_register(&cm_class);
|
|
if (ret) {
|
|
ret = -ENOMEM;
|
|
goto error1;
|
|
}
|
|
|
|
cm.wq = create_workqueue("ib_cm");
|
|
if (!cm.wq) {
|
|
ret = -ENOMEM;
|
|
goto error2;
|
|
}
|
|
|
|
ret = ib_register_client(&cm_client);
|
|
if (ret)
|
|
goto error3;
|
|
|
|
return 0;
|
|
error3:
|
|
destroy_workqueue(cm.wq);
|
|
error2:
|
|
class_unregister(&cm_class);
|
|
error1:
|
|
idr_destroy(&cm.local_id_table);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ib_cm_cleanup(void)
|
|
{
|
|
struct cm_timewait_info *timewait_info, *tmp;
|
|
|
|
spin_lock_irq(&cm.lock);
|
|
list_for_each_entry(timewait_info, &cm.timewait_list, list)
|
|
cancel_delayed_work(&timewait_info->work.work);
|
|
spin_unlock_irq(&cm.lock);
|
|
|
|
ib_unregister_client(&cm_client);
|
|
destroy_workqueue(cm.wq);
|
|
|
|
list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) {
|
|
list_del(&timewait_info->list);
|
|
kfree(timewait_info);
|
|
}
|
|
|
|
class_unregister(&cm_class);
|
|
idr_destroy(&cm.local_id_table);
|
|
}
|
|
|
|
module_init(ib_cm_init);
|
|
module_exit(ib_cm_cleanup);
|
|
|