4527 lines
129 KiB
C
4527 lines
129 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
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/*
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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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* Copyright (c) 2019, Mellanox Technologies inc. All rights reserved.
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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 <rdma/ib_sysfs.h>
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#include "cm_msgs.h"
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#include "core_priv.h"
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#include "cm_trace.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 const char * const ibcm_rej_reason_strs[] = {
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[IB_CM_REJ_NO_QP] = "no QP",
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[IB_CM_REJ_NO_EEC] = "no EEC",
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[IB_CM_REJ_NO_RESOURCES] = "no resources",
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[IB_CM_REJ_TIMEOUT] = "timeout",
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[IB_CM_REJ_UNSUPPORTED] = "unsupported",
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[IB_CM_REJ_INVALID_COMM_ID] = "invalid comm ID",
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[IB_CM_REJ_INVALID_COMM_INSTANCE] = "invalid comm instance",
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[IB_CM_REJ_INVALID_SERVICE_ID] = "invalid service ID",
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[IB_CM_REJ_INVALID_TRANSPORT_TYPE] = "invalid transport type",
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[IB_CM_REJ_STALE_CONN] = "stale conn",
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[IB_CM_REJ_RDC_NOT_EXIST] = "RDC not exist",
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[IB_CM_REJ_INVALID_GID] = "invalid GID",
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[IB_CM_REJ_INVALID_LID] = "invalid LID",
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[IB_CM_REJ_INVALID_SL] = "invalid SL",
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[IB_CM_REJ_INVALID_TRAFFIC_CLASS] = "invalid traffic class",
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[IB_CM_REJ_INVALID_HOP_LIMIT] = "invalid hop limit",
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[IB_CM_REJ_INVALID_PACKET_RATE] = "invalid packet rate",
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[IB_CM_REJ_INVALID_ALT_GID] = "invalid alt GID",
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[IB_CM_REJ_INVALID_ALT_LID] = "invalid alt LID",
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[IB_CM_REJ_INVALID_ALT_SL] = "invalid alt SL",
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[IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS] = "invalid alt traffic class",
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[IB_CM_REJ_INVALID_ALT_HOP_LIMIT] = "invalid alt hop limit",
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[IB_CM_REJ_INVALID_ALT_PACKET_RATE] = "invalid alt packet rate",
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[IB_CM_REJ_PORT_CM_REDIRECT] = "port CM redirect",
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[IB_CM_REJ_PORT_REDIRECT] = "port redirect",
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[IB_CM_REJ_INVALID_MTU] = "invalid MTU",
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[IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES] = "insufficient resp resources",
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[IB_CM_REJ_CONSUMER_DEFINED] = "consumer defined",
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[IB_CM_REJ_INVALID_RNR_RETRY] = "invalid RNR retry",
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[IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID] = "duplicate local comm ID",
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[IB_CM_REJ_INVALID_CLASS_VERSION] = "invalid class version",
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[IB_CM_REJ_INVALID_FLOW_LABEL] = "invalid flow label",
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[IB_CM_REJ_INVALID_ALT_FLOW_LABEL] = "invalid alt flow label",
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[IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED] =
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"vendor option is not supported",
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};
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const char *__attribute_const__ ibcm_reject_msg(int reason)
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{
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size_t index = reason;
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if (index < ARRAY_SIZE(ibcm_rej_reason_strs) &&
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ibcm_rej_reason_strs[index])
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return ibcm_rej_reason_strs[index];
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else
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return "unrecognized reason";
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}
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EXPORT_SYMBOL(ibcm_reject_msg);
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struct cm_id_private;
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struct cm_work;
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static int 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 void cm_process_work(struct cm_id_private *cm_id_priv,
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struct cm_work *work);
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static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv,
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struct ib_cm_sidr_rep_param *param);
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static int cm_send_dreq_locked(struct cm_id_private *cm_id_priv,
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const void *private_data, u8 private_data_len);
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static int cm_send_drep_locked(struct cm_id_private *cm_id_priv,
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void *private_data, u8 private_data_len);
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static int cm_send_rej_locked(struct cm_id_private *cm_id_priv,
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enum ib_cm_rej_reason reason, void *ari,
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u8 ari_length, const void *private_data,
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u8 private_data_len);
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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 xarray local_id_table;
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u32 local_id_next;
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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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struct cm_counter_attribute {
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struct ib_port_attribute attr;
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unsigned short group;
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unsigned short index;
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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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u32 port_num;
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atomic_long_t counters[CM_COUNTER_GROUPS][CM_ATTR_COUNT];
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};
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struct cm_device {
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struct kref kref;
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struct list_head list;
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spinlock_t mad_agent_lock;
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struct ib_device *ib_device;
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u8 ack_delay;
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int going_down;
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struct cm_port *port[];
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};
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struct cm_av {
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struct cm_port *port;
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struct rdma_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 sa_path_rec path[];
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};
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struct cm_timewait_info {
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struct cm_work work;
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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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u32 sidr_slid;
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spinlock_t lock; /* Do not acquire inside cm.lock */
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struct completion comp;
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refcount_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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*/
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int listen_sharecount;
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struct rcu_head rcu;
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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 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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struct rdma_ucm_ece ece;
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};
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static void cm_dev_release(struct kref *kref)
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{
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struct cm_device *cm_dev = container_of(kref, struct cm_device, kref);
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u32 i;
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rdma_for_each_port(cm_dev->ib_device, i)
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kfree(cm_dev->port[i - 1]);
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kfree(cm_dev);
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}
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static void cm_device_put(struct cm_device *cm_dev)
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{
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kref_put(&cm_dev->kref, cm_dev_release);
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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 (refcount_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 struct ib_mad_send_buf *cm_alloc_msg(struct cm_id_private *cm_id_priv)
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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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lockdep_assert_held(&cm_id_priv->lock);
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if (!cm_id_priv->av.port)
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return ERR_PTR(-EINVAL);
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spin_lock(&cm_id_priv->av.port->cm_dev->mad_agent_lock);
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mad_agent = cm_id_priv->av.port->mad_agent;
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if (!mad_agent) {
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m = ERR_PTR(-EINVAL);
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goto out;
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}
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ah = rdma_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr, 0);
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if (IS_ERR(ah)) {
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m = ERR_CAST(ah);
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goto out;
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}
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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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rdma_destroy_ah(ah, 0);
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goto out;
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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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refcount_inc(&cm_id_priv->refcount);
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m->context[0] = cm_id_priv;
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out:
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spin_unlock(&cm_id_priv->av.port->cm_dev->mad_agent_lock);
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return m;
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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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struct cm_id_private *cm_id_priv = msg->context[0];
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if (msg->ah)
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rdma_destroy_ah(msg->ah, 0);
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cm_deref_id(cm_id_priv);
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ib_free_send_mad(msg);
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}
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static struct ib_mad_send_buf *
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cm_alloc_priv_msg(struct cm_id_private *cm_id_priv)
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{
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struct ib_mad_send_buf *msg;
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lockdep_assert_held(&cm_id_priv->lock);
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msg = cm_alloc_msg(cm_id_priv);
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if (IS_ERR(msg))
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return msg;
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cm_id_priv->msg = msg;
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return msg;
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}
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static void cm_free_priv_msg(struct ib_mad_send_buf *msg)
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{
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struct cm_id_private *cm_id_priv = msg->context[0];
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lockdep_assert_held(&cm_id_priv->lock);
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if (!WARN_ON(cm_id_priv->msg != msg))
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cm_id_priv->msg = NULL;
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if (msg->ah)
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rdma_destroy_ah(msg->ah, 0);
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cm_deref_id(cm_id_priv);
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ib_free_send_mad(msg);
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}
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static struct ib_mad_send_buf *cm_alloc_response_msg_no_ah(struct cm_port *port,
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struct ib_mad_recv_wc *mad_recv_wc)
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{
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return 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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}
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static int cm_create_response_msg_ah(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_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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msg->ah = ah;
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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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int ret;
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m = cm_alloc_response_msg_no_ah(port, mad_recv_wc);
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if (IS_ERR(m))
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return PTR_ERR(m);
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ret = cm_create_response_msg_ah(port, mad_recv_wc, m);
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if (ret) {
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ib_free_send_mad(m);
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return ret;
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}
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*msg = m;
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return 0;
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}
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static void cm_free_response_msg(struct ib_mad_send_buf *msg)
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{
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if (msg->ah)
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rdma_destroy_ah(msg->ah, 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, 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_set_av_port(struct cm_av *av, struct cm_port *port)
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{
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struct cm_port *old_port = av->port;
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if (old_port == port)
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return;
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av->port = port;
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if (old_port)
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cm_device_put(old_port->cm_dev);
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if (port)
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kref_get(&port->cm_dev->kref);
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}
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static void cm_init_av_for_lap(struct cm_port *port, struct ib_wc *wc,
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struct rdma_ah_attr *ah_attr, struct cm_av *av)
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{
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cm_set_av_port(av, port);
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av->pkey_index = wc->pkey_index;
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rdma_move_ah_attr(&av->ah_attr, ah_attr);
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}
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static int 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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cm_set_av_port(av, port);
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av->pkey_index = wc->pkey_index;
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return ib_init_ah_attr_from_wc(port->cm_dev->ib_device,
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port->port_num, wc,
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grh, &av->ah_attr);
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}
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static struct cm_port *
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get_cm_port_from_path(struct sa_path_rec *path, const struct ib_gid_attr *attr)
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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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if (attr) {
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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 (cm_dev->ib_device == attr->device) {
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port = cm_dev->port[attr->port_num - 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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} else {
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/* SGID attribute can be NULL in following
|
|
* conditions.
|
|
* (a) Alternative path
|
|
* (b) IB link layer without GRH
|
|
* (c) LAP send messages
|
|
*/
|
|
read_lock_irqsave(&cm.device_lock, flags);
|
|
list_for_each_entry(cm_dev, &cm.device_list, list) {
|
|
attr = rdma_find_gid(cm_dev->ib_device,
|
|
&path->sgid,
|
|
sa_conv_pathrec_to_gid_type(path),
|
|
NULL);
|
|
if (!IS_ERR(attr)) {
|
|
port = cm_dev->port[attr->port_num - 1];
|
|
break;
|
|
}
|
|
}
|
|
read_unlock_irqrestore(&cm.device_lock, flags);
|
|
if (port)
|
|
rdma_put_gid_attr(attr);
|
|
}
|
|
return port;
|
|
}
|
|
|
|
static int cm_init_av_by_path(struct sa_path_rec *path,
|
|
const struct ib_gid_attr *sgid_attr,
|
|
struct cm_av *av)
|
|
{
|
|
struct rdma_ah_attr new_ah_attr;
|
|
struct cm_device *cm_dev;
|
|
struct cm_port *port;
|
|
int ret;
|
|
|
|
port = get_cm_port_from_path(path, sgid_attr);
|
|
if (!port)
|
|
return -EINVAL;
|
|
cm_dev = port->cm_dev;
|
|
|
|
ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num,
|
|
be16_to_cpu(path->pkey), &av->pkey_index);
|
|
if (ret)
|
|
return ret;
|
|
|
|
cm_set_av_port(av, port);
|
|
|
|
/*
|
|
* av->ah_attr might be initialized based on wc or during
|
|
* request processing time which might have reference to sgid_attr.
|
|
* So initialize a new ah_attr on stack.
|
|
* If initialization fails, old ah_attr is used for sending any
|
|
* responses. If initialization is successful, than new ah_attr
|
|
* is used by overwriting the old one. So that right ah_attr
|
|
* can be used to return an error response.
|
|
*/
|
|
ret = ib_init_ah_attr_from_path(cm_dev->ib_device, port->port_num, path,
|
|
&new_ah_attr, sgid_attr);
|
|
if (ret)
|
|
return ret;
|
|
|
|
av->timeout = path->packet_life_time + 1;
|
|
rdma_move_ah_attr(&av->ah_attr, &new_ah_attr);
|
|
return 0;
|
|
}
|
|
|
|
/* Move av created by cm_init_av_by_path(), so av.dgid is not moved */
|
|
static void cm_move_av_from_path(struct cm_av *dest, struct cm_av *src)
|
|
{
|
|
cm_set_av_port(dest, src->port);
|
|
cm_set_av_port(src, NULL);
|
|
dest->pkey_index = src->pkey_index;
|
|
rdma_move_ah_attr(&dest->ah_attr, &src->ah_attr);
|
|
dest->timeout = src->timeout;
|
|
}
|
|
|
|
static void cm_destroy_av(struct cm_av *av)
|
|
{
|
|
rdma_destroy_ah_attr(&av->ah_attr);
|
|
cm_set_av_port(av, NULL);
|
|
}
|
|
|
|
static u32 cm_local_id(__be32 local_id)
|
|
{
|
|
return (__force u32) (local_id ^ cm.random_id_operand);
|
|
}
|
|
|
|
static struct cm_id_private *cm_acquire_id(__be32 local_id, __be32 remote_id)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
|
|
rcu_read_lock();
|
|
cm_id_priv = xa_load(&cm.local_id_table, cm_local_id(local_id));
|
|
if (!cm_id_priv || cm_id_priv->id.remote_id != remote_id ||
|
|
!refcount_inc_not_zero(&cm_id_priv->refcount))
|
|
cm_id_priv = NULL;
|
|
rcu_read_unlock();
|
|
|
|
return cm_id_priv;
|
|
}
|
|
|
|
/*
|
|
* Trivial helpers to strip endian annotation and compare; the
|
|
* endianness doesn't actually matter since we just need a stable
|
|
* order for the RB tree.
|
|
*/
|
|
static int be32_lt(__be32 a, __be32 b)
|
|
{
|
|
return (__force u32) a < (__force u32) b;
|
|
}
|
|
|
|
static int be32_gt(__be32 a, __be32 b)
|
|
{
|
|
return (__force u32) a > (__force u32) b;
|
|
}
|
|
|
|
static int be64_lt(__be64 a, __be64 b)
|
|
{
|
|
return (__force u64) a < (__force u64) b;
|
|
}
|
|
|
|
static int be64_gt(__be64 a, __be64 b)
|
|
{
|
|
return (__force u64) a > (__force u64) b;
|
|
}
|
|
|
|
/*
|
|
* Inserts a new cm_id_priv into the listen_service_table. Returns cm_id_priv
|
|
* if the new ID was inserted, NULL if it could not be inserted due to a
|
|
* collision, or the existing cm_id_priv ready for shared usage.
|
|
*/
|
|
static struct cm_id_private *cm_insert_listen(struct cm_id_private *cm_id_priv,
|
|
ib_cm_handler shared_handler)
|
|
{
|
|
struct rb_node **link = &cm.listen_service_table.rb_node;
|
|
struct rb_node *parent = NULL;
|
|
struct cm_id_private *cur_cm_id_priv;
|
|
__be64 service_id = cm_id_priv->id.service_id;
|
|
__be64 service_mask = cm_id_priv->id.service_mask;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cm.lock, flags);
|
|
while (*link) {
|
|
parent = *link;
|
|
cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
|
|
service_node);
|
|
if ((cur_cm_id_priv->id.service_mask & service_id) ==
|
|
(service_mask & cur_cm_id_priv->id.service_id) &&
|
|
(cm_id_priv->id.device == cur_cm_id_priv->id.device)) {
|
|
/*
|
|
* Sharing an ib_cm_id with different handlers is not
|
|
* supported
|
|
*/
|
|
if (cur_cm_id_priv->id.cm_handler != shared_handler ||
|
|
cur_cm_id_priv->id.context ||
|
|
WARN_ON(!cur_cm_id_priv->id.cm_handler)) {
|
|
spin_unlock_irqrestore(&cm.lock, flags);
|
|
return NULL;
|
|
}
|
|
refcount_inc(&cur_cm_id_priv->refcount);
|
|
cur_cm_id_priv->listen_sharecount++;
|
|
spin_unlock_irqrestore(&cm.lock, flags);
|
|
return cur_cm_id_priv;
|
|
}
|
|
|
|
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;
|
|
}
|
|
cm_id_priv->listen_sharecount++;
|
|
rb_link_node(&cm_id_priv->service_node, parent, link);
|
|
rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table);
|
|
spin_unlock_irqrestore(&cm.lock, flags);
|
|
return cm_id_priv;
|
|
}
|
|
|
|
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)) {
|
|
refcount_inc(&cm_id_priv->refcount);
|
|
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_id_private *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;
|
|
struct cm_id_private *res = NULL;
|
|
|
|
spin_lock_irq(&cm.lock);
|
|
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 {
|
|
res = cm_acquire_id(timewait_info->work.local_id,
|
|
timewait_info->work.remote_id);
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irq(&cm.lock);
|
|
return res;
|
|
}
|
|
|
|
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;
|
|
__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 {
|
|
if (cur_cm_id_priv->sidr_slid < cm_id_priv->sidr_slid)
|
|
link = &(*link)->rb_left;
|
|
else if (cur_cm_id_priv->sidr_slid > cm_id_priv->sidr_slid)
|
|
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 struct cm_id_private *cm_alloc_id_priv(struct ib_device *device,
|
|
ib_cm_handler cm_handler,
|
|
void *context)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
u32 id;
|
|
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;
|
|
|
|
RB_CLEAR_NODE(&cm_id_priv->service_node);
|
|
RB_CLEAR_NODE(&cm_id_priv->sidr_id_node);
|
|
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);
|
|
refcount_set(&cm_id_priv->refcount, 1);
|
|
|
|
ret = xa_alloc_cyclic(&cm.local_id_table, &id, NULL, xa_limit_32b,
|
|
&cm.local_id_next, GFP_KERNEL);
|
|
if (ret < 0)
|
|
goto error;
|
|
cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand;
|
|
|
|
return cm_id_priv;
|
|
|
|
error:
|
|
kfree(cm_id_priv);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
/*
|
|
* Make the ID visible to the MAD handlers and other threads that use the
|
|
* xarray.
|
|
*/
|
|
static void cm_finalize_id(struct cm_id_private *cm_id_priv)
|
|
{
|
|
xa_store(&cm.local_id_table, cm_local_id(cm_id_priv->id.local_id),
|
|
cm_id_priv, GFP_ATOMIC);
|
|
}
|
|
|
|
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;
|
|
|
|
cm_id_priv = cm_alloc_id_priv(device, cm_handler, context);
|
|
if (IS_ERR(cm_id_priv))
|
|
return ERR_CAST(cm_id_priv);
|
|
|
|
cm_finalize_id(cm_id_priv);
|
|
return &cm_id_priv->id;
|
|
}
|
|
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 void cm_queue_work_unlock(struct cm_id_private *cm_id_priv,
|
|
struct cm_work *work)
|
|
__releases(&cm_id_priv->lock)
|
|
{
|
|
bool immediate;
|
|
|
|
/*
|
|
* To deliver the event to the user callback we have the drop the
|
|
* spinlock, however, we need to ensure that the user callback is single
|
|
* threaded and receives events in the temporal order. If there are
|
|
* already events being processed then thread new events onto a list,
|
|
* the thread currently processing will pick them up.
|
|
*/
|
|
immediate = atomic_inc_and_test(&cm_id_priv->work_count);
|
|
if (!immediate) {
|
|
list_add_tail(&work->list, &cm_id_priv->work_list);
|
|
/*
|
|
* This routine always consumes incoming reference. Once queued
|
|
* to the work_list then a reference is held by the thread
|
|
* currently running cm_process_work() and this reference is not
|
|
* needed.
|
|
*/
|
|
cm_deref_id(cm_id_priv);
|
|
}
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
if (immediate)
|
|
cm_process_work(cm_id_priv, 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_remove_remote(struct cm_id_private *cm_id_priv)
|
|
{
|
|
struct cm_timewait_info *timewait_info = cm_id_priv->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;
|
|
|
|
lockdep_assert_held(&cm_id_priv->lock);
|
|
|
|
cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client);
|
|
if (!cm_dev)
|
|
return;
|
|
|
|
spin_lock_irqsave(&cm.lock, flags);
|
|
cm_remove_remote(cm_id_priv);
|
|
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_irqsave(&cm.lock, flags);
|
|
if (!cm_dev->going_down)
|
|
queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work,
|
|
msecs_to_jiffies(wait_time));
|
|
spin_unlock_irqrestore(&cm.lock, flags);
|
|
|
|
/*
|
|
* The timewait_info is converted into a work and gets freed during
|
|
* cm_free_work() in cm_timewait_handler().
|
|
*/
|
|
BUILD_BUG_ON(offsetof(struct cm_timewait_info, work) != 0);
|
|
cm_id_priv->timewait_info = NULL;
|
|
}
|
|
|
|
static void cm_reset_to_idle(struct cm_id_private *cm_id_priv)
|
|
{
|
|
unsigned long flags;
|
|
|
|
lockdep_assert_held(&cm_id_priv->lock);
|
|
|
|
cm_id_priv->id.state = IB_CM_IDLE;
|
|
if (cm_id_priv->timewait_info) {
|
|
spin_lock_irqsave(&cm.lock, flags);
|
|
cm_remove_remote(cm_id_priv);
|
|
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);
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
retest:
|
|
switch (cm_id->state) {
|
|
case IB_CM_LISTEN:
|
|
spin_lock(&cm.lock);
|
|
if (--cm_id_priv->listen_sharecount > 0) {
|
|
/* The id is still shared. */
|
|
WARN_ON(refcount_read(&cm_id_priv->refcount) == 1);
|
|
spin_unlock(&cm.lock);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
cm_deref_id(cm_id_priv);
|
|
return;
|
|
}
|
|
cm_id->state = IB_CM_IDLE;
|
|
rb_erase(&cm_id_priv->service_node, &cm.listen_service_table);
|
|
RB_CLEAR_NODE(&cm_id_priv->service_node);
|
|
spin_unlock(&cm.lock);
|
|
break;
|
|
case IB_CM_SIDR_REQ_SENT:
|
|
cm_id->state = IB_CM_IDLE;
|
|
ib_cancel_mad(cm_id_priv->msg);
|
|
break;
|
|
case IB_CM_SIDR_REQ_RCVD:
|
|
cm_send_sidr_rep_locked(cm_id_priv,
|
|
&(struct ib_cm_sidr_rep_param){
|
|
.status = IB_SIDR_REJECT });
|
|
/* cm_send_sidr_rep_locked will not move to IDLE if it fails */
|
|
cm_id->state = IB_CM_IDLE;
|
|
break;
|
|
case IB_CM_REQ_SENT:
|
|
case IB_CM_MRA_REQ_RCVD:
|
|
ib_cancel_mad(cm_id_priv->msg);
|
|
cm_send_rej_locked(cm_id_priv, 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);
|
|
} else {
|
|
cm_send_rej_locked(cm_id_priv,
|
|
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->msg);
|
|
cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL,
|
|
0, NULL, 0);
|
|
goto retest;
|
|
case IB_CM_MRA_REQ_SENT:
|
|
case IB_CM_REP_RCVD:
|
|
case IB_CM_MRA_REP_SENT:
|
|
cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL,
|
|
0, NULL, 0);
|
|
break;
|
|
case IB_CM_ESTABLISHED:
|
|
if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) {
|
|
cm_id->state = IB_CM_IDLE;
|
|
break;
|
|
}
|
|
cm_send_dreq_locked(cm_id_priv, NULL, 0);
|
|
goto retest;
|
|
case IB_CM_DREQ_SENT:
|
|
ib_cancel_mad(cm_id_priv->msg);
|
|
cm_enter_timewait(cm_id_priv);
|
|
goto retest;
|
|
case IB_CM_DREQ_RCVD:
|
|
cm_send_drep_locked(cm_id_priv, NULL, 0);
|
|
WARN_ON(cm_id->state != IB_CM_TIMEWAIT);
|
|
goto retest;
|
|
case IB_CM_TIMEWAIT:
|
|
/*
|
|
* The cm_acquire_id in cm_timewait_handler will stop working
|
|
* once we do xa_erase below, so just move to idle here for
|
|
* consistency.
|
|
*/
|
|
cm_id->state = IB_CM_IDLE;
|
|
break;
|
|
case IB_CM_IDLE:
|
|
break;
|
|
}
|
|
WARN_ON(cm_id->state != IB_CM_IDLE);
|
|
|
|
spin_lock(&cm.lock);
|
|
/* Required for cleanup paths related cm_req_handler() */
|
|
if (cm_id_priv->timewait_info) {
|
|
cm_remove_remote(cm_id_priv);
|
|
kfree(cm_id_priv->timewait_info);
|
|
cm_id_priv->timewait_info = NULL;
|
|
}
|
|
|
|
WARN_ON(cm_id_priv->listen_sharecount);
|
|
WARN_ON(!RB_EMPTY_NODE(&cm_id_priv->service_node));
|
|
if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node))
|
|
rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
|
|
spin_unlock(&cm.lock);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
xa_erase(&cm.local_id_table, cm_local_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);
|
|
|
|
cm_destroy_av(&cm_id_priv->av);
|
|
cm_destroy_av(&cm_id_priv->alt_av);
|
|
kfree(cm_id_priv->private_data);
|
|
kfree_rcu(cm_id_priv, rcu);
|
|
}
|
|
|
|
void ib_destroy_cm_id(struct ib_cm_id *cm_id)
|
|
{
|
|
cm_destroy_id(cm_id, 0);
|
|
}
|
|
EXPORT_SYMBOL(ib_destroy_cm_id);
|
|
|
|
static int cm_init_listen(struct cm_id_private *cm_id_priv, __be64 service_id,
|
|
__be64 service_mask)
|
|
{
|
|
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;
|
|
|
|
if (service_id == IB_CM_ASSIGN_SERVICE_ID) {
|
|
cm_id_priv->id.service_id = cpu_to_be64(cm.listen_service_id++);
|
|
cm_id_priv->id.service_mask = ~cpu_to_be64(0);
|
|
} else {
|
|
cm_id_priv->id.service_id = service_id;
|
|
cm_id_priv->id.service_mask = service_mask;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask)
|
|
{
|
|
struct cm_id_private *cm_id_priv =
|
|
container_of(cm_id, struct cm_id_private, id);
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
if (cm_id_priv->id.state != IB_CM_IDLE) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ret = cm_init_listen(cm_id_priv, service_id, service_mask);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (!cm_insert_listen(cm_id_priv, NULL)) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
cm_id_priv->id.state = IB_CM_LISTEN;
|
|
ret = 0;
|
|
|
|
out:
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_cm_listen);
|
|
|
|
/**
|
|
* ib_cm_insert_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 *listen_id_priv;
|
|
struct cm_id_private *cm_id_priv;
|
|
int err = 0;
|
|
|
|
/* Create an ID in advance, since the creation may sleep */
|
|
cm_id_priv = cm_alloc_id_priv(device, cm_handler, NULL);
|
|
if (IS_ERR(cm_id_priv))
|
|
return ERR_CAST(cm_id_priv);
|
|
|
|
err = cm_init_listen(cm_id_priv, service_id, 0);
|
|
if (err)
|
|
return ERR_PTR(err);
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
listen_id_priv = cm_insert_listen(cm_id_priv, cm_handler);
|
|
if (listen_id_priv != cm_id_priv) {
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
ib_destroy_cm_id(&cm_id_priv->id);
|
|
if (!listen_id_priv)
|
|
return ERR_PTR(-EINVAL);
|
|
return &listen_id_priv->id;
|
|
}
|
|
cm_id_priv->id.state = IB_CM_LISTEN;
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
/*
|
|
* A listen ID does not need to be in the xarray since it does not
|
|
* receive mads, is not placed in the remote_id or remote_qpn rbtree,
|
|
* and does not enter timewait.
|
|
*/
|
|
|
|
return &cm_id_priv->id;
|
|
}
|
|
EXPORT_SYMBOL(ib_cm_insert_listen);
|
|
|
|
static __be64 cm_form_tid(struct cm_id_private *cm_id_priv)
|
|
{
|
|
u64 hi_tid = 0, low_tid;
|
|
|
|
lockdep_assert_held(&cm_id_priv->lock);
|
|
|
|
low_tid = (u64)cm_id_priv->id.local_id;
|
|
if (!cm_id_priv->av.port)
|
|
return cpu_to_be64(low_tid);
|
|
|
|
spin_lock(&cm_id_priv->av.port->cm_dev->mad_agent_lock);
|
|
if (cm_id_priv->av.port->mad_agent)
|
|
hi_tid = ((u64)cm_id_priv->av.port->mad_agent->hi_tid) << 32;
|
|
spin_unlock(&cm_id_priv->av.port->cm_dev->mad_agent_lock);
|
|
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_mad_ece_hdr(struct ib_mad_hdr *hdr, __be16 attr_id,
|
|
__be64 tid, u32 attr_mod)
|
|
{
|
|
cm_format_mad_hdr(hdr, attr_id, tid);
|
|
hdr->attr_mod = cpu_to_be32(attr_mod);
|
|
}
|
|
|
|
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 sa_path_rec *pri_path = param->primary_path;
|
|
struct sa_path_rec *alt_path = param->alternate_path;
|
|
bool pri_ext = false;
|
|
|
|
if (pri_path->rec_type == SA_PATH_REC_TYPE_OPA)
|
|
pri_ext = opa_is_extended_lid(pri_path->opa.dlid,
|
|
pri_path->opa.slid);
|
|
|
|
cm_format_mad_ece_hdr(&req_msg->hdr, CM_REQ_ATTR_ID,
|
|
cm_form_tid(cm_id_priv), param->ece.attr_mod);
|
|
|
|
IBA_SET(CM_REQ_LOCAL_COMM_ID, req_msg,
|
|
be32_to_cpu(cm_id_priv->id.local_id));
|
|
IBA_SET(CM_REQ_SERVICE_ID, req_msg, be64_to_cpu(param->service_id));
|
|
IBA_SET(CM_REQ_LOCAL_CA_GUID, req_msg,
|
|
be64_to_cpu(cm_id_priv->id.device->node_guid));
|
|
IBA_SET(CM_REQ_LOCAL_QPN, req_msg, param->qp_num);
|
|
IBA_SET(CM_REQ_INITIATOR_DEPTH, req_msg, param->initiator_depth);
|
|
IBA_SET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg,
|
|
param->remote_cm_response_timeout);
|
|
cm_req_set_qp_type(req_msg, param->qp_type);
|
|
IBA_SET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg, param->flow_control);
|
|
IBA_SET(CM_REQ_STARTING_PSN, req_msg, param->starting_psn);
|
|
IBA_SET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg,
|
|
param->local_cm_response_timeout);
|
|
IBA_SET(CM_REQ_PARTITION_KEY, req_msg,
|
|
be16_to_cpu(param->primary_path->pkey));
|
|
IBA_SET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg,
|
|
param->primary_path->mtu);
|
|
IBA_SET(CM_REQ_MAX_CM_RETRIES, req_msg, param->max_cm_retries);
|
|
|
|
if (param->qp_type != IB_QPT_XRC_INI) {
|
|
IBA_SET(CM_REQ_RESPONDER_RESOURCES, req_msg,
|
|
param->responder_resources);
|
|
IBA_SET(CM_REQ_RETRY_COUNT, req_msg, param->retry_count);
|
|
IBA_SET(CM_REQ_RNR_RETRY_COUNT, req_msg,
|
|
param->rnr_retry_count);
|
|
IBA_SET(CM_REQ_SRQ, req_msg, param->srq);
|
|
}
|
|
|
|
*IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg) =
|
|
pri_path->sgid;
|
|
*IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg) =
|
|
pri_path->dgid;
|
|
if (pri_ext) {
|
|
IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg)
|
|
->global.interface_id =
|
|
OPA_MAKE_ID(be32_to_cpu(pri_path->opa.slid));
|
|
IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg)
|
|
->global.interface_id =
|
|
OPA_MAKE_ID(be32_to_cpu(pri_path->opa.dlid));
|
|
}
|
|
if (pri_path->hop_limit <= 1) {
|
|
IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
|
|
be16_to_cpu(pri_ext ? 0 :
|
|
htons(ntohl(sa_path_get_slid(
|
|
pri_path)))));
|
|
IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
|
|
be16_to_cpu(pri_ext ? 0 :
|
|
htons(ntohl(sa_path_get_dlid(
|
|
pri_path)))));
|
|
} else {
|
|
/* Work-around until there's a way to obtain remote LID info */
|
|
IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
|
|
be16_to_cpu(IB_LID_PERMISSIVE));
|
|
IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
|
|
be16_to_cpu(IB_LID_PERMISSIVE));
|
|
}
|
|
IBA_SET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg,
|
|
be32_to_cpu(pri_path->flow_label));
|
|
IBA_SET(CM_REQ_PRIMARY_PACKET_RATE, req_msg, pri_path->rate);
|
|
IBA_SET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg, pri_path->traffic_class);
|
|
IBA_SET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg, pri_path->hop_limit);
|
|
IBA_SET(CM_REQ_PRIMARY_SL, req_msg, pri_path->sl);
|
|
IBA_SET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg,
|
|
(pri_path->hop_limit <= 1));
|
|
IBA_SET(CM_REQ_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) {
|
|
bool alt_ext = false;
|
|
|
|
if (alt_path->rec_type == SA_PATH_REC_TYPE_OPA)
|
|
alt_ext = opa_is_extended_lid(alt_path->opa.dlid,
|
|
alt_path->opa.slid);
|
|
|
|
*IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg) =
|
|
alt_path->sgid;
|
|
*IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg) =
|
|
alt_path->dgid;
|
|
if (alt_ext) {
|
|
IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID,
|
|
req_msg)
|
|
->global.interface_id =
|
|
OPA_MAKE_ID(be32_to_cpu(alt_path->opa.slid));
|
|
IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID,
|
|
req_msg)
|
|
->global.interface_id =
|
|
OPA_MAKE_ID(be32_to_cpu(alt_path->opa.dlid));
|
|
}
|
|
if (alt_path->hop_limit <= 1) {
|
|
IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg,
|
|
be16_to_cpu(
|
|
alt_ext ? 0 :
|
|
htons(ntohl(sa_path_get_slid(
|
|
alt_path)))));
|
|
IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg,
|
|
be16_to_cpu(
|
|
alt_ext ? 0 :
|
|
htons(ntohl(sa_path_get_dlid(
|
|
alt_path)))));
|
|
} else {
|
|
IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg,
|
|
be16_to_cpu(IB_LID_PERMISSIVE));
|
|
IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg,
|
|
be16_to_cpu(IB_LID_PERMISSIVE));
|
|
}
|
|
IBA_SET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg,
|
|
be32_to_cpu(alt_path->flow_label));
|
|
IBA_SET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg, alt_path->rate);
|
|
IBA_SET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg,
|
|
alt_path->traffic_class);
|
|
IBA_SET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg,
|
|
alt_path->hop_limit);
|
|
IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, alt_path->sl);
|
|
IBA_SET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg,
|
|
(alt_path->hop_limit <= 1));
|
|
IBA_SET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg,
|
|
cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay,
|
|
alt_path->packet_life_time));
|
|
}
|
|
IBA_SET(CM_REQ_VENDOR_ID, req_msg, param->ece.vendor_id);
|
|
|
|
if (param->private_data && param->private_data_len)
|
|
IBA_SET_MEM(CM_REQ_PRIVATE_DATA, req_msg, param->private_data,
|
|
param->private_data_len);
|
|
}
|
|
|
|
static int cm_validate_req_param(struct ib_cm_req_param *param)
|
|
{
|
|
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_av av = {}, alt_av = {};
|
|
struct cm_id_private *cm_id_priv;
|
|
struct ib_mad_send_buf *msg;
|
|
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 || WARN_ON(cm_id_priv->timewait_info)) {
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return -EINVAL;
|
|
}
|
|
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);
|
|
cm_id_priv->timewait_info = NULL;
|
|
return ret;
|
|
}
|
|
|
|
ret = cm_init_av_by_path(param->primary_path,
|
|
param->ppath_sgid_attr, &av);
|
|
if (ret)
|
|
return ret;
|
|
if (param->alternate_path) {
|
|
ret = cm_init_av_by_path(param->alternate_path, NULL,
|
|
&alt_av);
|
|
if (ret) {
|
|
cm_destroy_av(&av);
|
|
return ret;
|
|
}
|
|
}
|
|
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;
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
|
|
cm_move_av_from_path(&cm_id_priv->av, &av);
|
|
if (param->alternate_path)
|
|
cm_move_av_from_path(&cm_id_priv->alt_av, &alt_av);
|
|
|
|
msg = cm_alloc_priv_msg(cm_id_priv);
|
|
if (IS_ERR(msg)) {
|
|
ret = PTR_ERR(msg);
|
|
goto out_unlock;
|
|
}
|
|
|
|
req_msg = (struct cm_req_msg *)msg->mad;
|
|
cm_format_req(req_msg, cm_id_priv, param);
|
|
cm_id_priv->tid = req_msg->hdr.tid;
|
|
msg->timeout_ms = cm_id_priv->timeout_ms;
|
|
msg->context[1] = (void *)(unsigned long)IB_CM_REQ_SENT;
|
|
|
|
cm_id_priv->local_qpn = cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg));
|
|
cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg));
|
|
|
|
trace_icm_send_req(&cm_id_priv->id);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
goto out_free;
|
|
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;
|
|
out_free:
|
|
cm_free_priv_msg(msg);
|
|
out_unlock:
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
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);
|
|
IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg,
|
|
IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg));
|
|
IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
|
|
IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg));
|
|
IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, msg_rejected);
|
|
IBA_SET(CM_REJ_REASON, rej_msg, reason);
|
|
|
|
if (ari && ari_length) {
|
|
IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length);
|
|
IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length);
|
|
}
|
|
|
|
trace_icm_issue_rej(
|
|
IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg),
|
|
IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg));
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
cm_free_response_msg(msg);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool cm_req_has_alt_path(struct cm_req_msg *req_msg)
|
|
{
|
|
return ((cpu_to_be16(
|
|
IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg))) ||
|
|
(ib_is_opa_gid(IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID,
|
|
req_msg))));
|
|
}
|
|
|
|
static void cm_path_set_rec_type(struct ib_device *ib_device, u32 port_num,
|
|
struct sa_path_rec *path, union ib_gid *gid)
|
|
{
|
|
if (ib_is_opa_gid(gid) && rdma_cap_opa_ah(ib_device, port_num))
|
|
path->rec_type = SA_PATH_REC_TYPE_OPA;
|
|
else
|
|
path->rec_type = SA_PATH_REC_TYPE_IB;
|
|
}
|
|
|
|
static void cm_format_path_lid_from_req(struct cm_req_msg *req_msg,
|
|
struct sa_path_rec *primary_path,
|
|
struct sa_path_rec *alt_path)
|
|
{
|
|
u32 lid;
|
|
|
|
if (primary_path->rec_type != SA_PATH_REC_TYPE_OPA) {
|
|
sa_path_set_dlid(primary_path,
|
|
IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID,
|
|
req_msg));
|
|
sa_path_set_slid(primary_path,
|
|
IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID,
|
|
req_msg));
|
|
} else {
|
|
lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
|
|
CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg));
|
|
sa_path_set_dlid(primary_path, lid);
|
|
|
|
lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
|
|
CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg));
|
|
sa_path_set_slid(primary_path, lid);
|
|
}
|
|
|
|
if (!cm_req_has_alt_path(req_msg))
|
|
return;
|
|
|
|
if (alt_path->rec_type != SA_PATH_REC_TYPE_OPA) {
|
|
sa_path_set_dlid(alt_path,
|
|
IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID,
|
|
req_msg));
|
|
sa_path_set_slid(alt_path,
|
|
IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID,
|
|
req_msg));
|
|
} else {
|
|
lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
|
|
CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg));
|
|
sa_path_set_dlid(alt_path, lid);
|
|
|
|
lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
|
|
CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg));
|
|
sa_path_set_slid(alt_path, lid);
|
|
}
|
|
}
|
|
|
|
static void cm_format_paths_from_req(struct cm_req_msg *req_msg,
|
|
struct sa_path_rec *primary_path,
|
|
struct sa_path_rec *alt_path)
|
|
{
|
|
primary_path->dgid =
|
|
*IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg);
|
|
primary_path->sgid =
|
|
*IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg);
|
|
primary_path->flow_label =
|
|
cpu_to_be32(IBA_GET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg));
|
|
primary_path->hop_limit = IBA_GET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg);
|
|
primary_path->traffic_class =
|
|
IBA_GET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg);
|
|
primary_path->reversible = 1;
|
|
primary_path->pkey =
|
|
cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg));
|
|
primary_path->sl = IBA_GET(CM_REQ_PRIMARY_SL, req_msg);
|
|
primary_path->mtu_selector = IB_SA_EQ;
|
|
primary_path->mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg);
|
|
primary_path->rate_selector = IB_SA_EQ;
|
|
primary_path->rate = IBA_GET(CM_REQ_PRIMARY_PACKET_RATE, req_msg);
|
|
primary_path->packet_life_time_selector = IB_SA_EQ;
|
|
primary_path->packet_life_time =
|
|
IBA_GET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, req_msg);
|
|
primary_path->packet_life_time -= (primary_path->packet_life_time > 0);
|
|
primary_path->service_id =
|
|
cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg));
|
|
if (sa_path_is_roce(primary_path))
|
|
primary_path->roce.route_resolved = false;
|
|
|
|
if (cm_req_has_alt_path(req_msg)) {
|
|
alt_path->dgid = *IBA_GET_MEM_PTR(
|
|
CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg);
|
|
alt_path->sgid = *IBA_GET_MEM_PTR(
|
|
CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg);
|
|
alt_path->flow_label = cpu_to_be32(
|
|
IBA_GET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg));
|
|
alt_path->hop_limit =
|
|
IBA_GET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg);
|
|
alt_path->traffic_class =
|
|
IBA_GET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg);
|
|
alt_path->reversible = 1;
|
|
alt_path->pkey =
|
|
cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg));
|
|
alt_path->sl = IBA_GET(CM_REQ_ALTERNATE_SL, req_msg);
|
|
alt_path->mtu_selector = IB_SA_EQ;
|
|
alt_path->mtu =
|
|
IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg);
|
|
alt_path->rate_selector = IB_SA_EQ;
|
|
alt_path->rate = IBA_GET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg);
|
|
alt_path->packet_life_time_selector = IB_SA_EQ;
|
|
alt_path->packet_life_time =
|
|
IBA_GET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg);
|
|
alt_path->packet_life_time -= (alt_path->packet_life_time > 0);
|
|
alt_path->service_id =
|
|
cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg));
|
|
|
|
if (sa_path_is_roce(alt_path))
|
|
alt_path->roce.route_resolved = false;
|
|
}
|
|
cm_format_path_lid_from_req(req_msg, primary_path, alt_path);
|
|
}
|
|
|
|
static u16 cm_get_bth_pkey(struct cm_work *work)
|
|
{
|
|
struct ib_device *ib_dev = work->port->cm_dev->ib_device;
|
|
u32 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 %u, pkey index %u). %d\n",
|
|
port_num, pkey_index, ret);
|
|
return 0;
|
|
}
|
|
|
|
return pkey;
|
|
}
|
|
|
|
/**
|
|
* cm_opa_to_ib_sgid - Convert OPA SGID to IB SGID
|
|
* ULPs (such as IPoIB) do not understand OPA GIDs and will
|
|
* reject them as the local_gid will not match the sgid. Therefore,
|
|
* change the pathrec's SGID to an IB SGID.
|
|
*
|
|
* @work: Work completion
|
|
* @path: Path record
|
|
*/
|
|
static void cm_opa_to_ib_sgid(struct cm_work *work,
|
|
struct sa_path_rec *path)
|
|
{
|
|
struct ib_device *dev = work->port->cm_dev->ib_device;
|
|
u32 port_num = work->port->port_num;
|
|
|
|
if (rdma_cap_opa_ah(dev, port_num) &&
|
|
(ib_is_opa_gid(&path->sgid))) {
|
|
union ib_gid sgid;
|
|
|
|
if (rdma_query_gid(dev, port_num, 0, &sgid)) {
|
|
dev_warn(&dev->dev,
|
|
"Error updating sgid in CM request\n");
|
|
return;
|
|
}
|
|
|
|
path->sgid = sgid;
|
|
}
|
|
}
|
|
|
|
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];
|
|
cm_opa_to_ib_sgid(work, param->primary_path);
|
|
if (cm_req_has_alt_path(req_msg)) {
|
|
param->alternate_path = &work->path[1];
|
|
cm_opa_to_ib_sgid(work, param->alternate_path);
|
|
} else {
|
|
param->alternate_path = NULL;
|
|
}
|
|
param->remote_ca_guid =
|
|
cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg));
|
|
param->remote_qkey = IBA_GET(CM_REQ_LOCAL_Q_KEY, req_msg);
|
|
param->remote_qpn = IBA_GET(CM_REQ_LOCAL_QPN, req_msg);
|
|
param->qp_type = cm_req_get_qp_type(req_msg);
|
|
param->starting_psn = IBA_GET(CM_REQ_STARTING_PSN, req_msg);
|
|
param->responder_resources = IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg);
|
|
param->initiator_depth = IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg);
|
|
param->local_cm_response_timeout =
|
|
IBA_GET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg);
|
|
param->flow_control = IBA_GET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg);
|
|
param->remote_cm_response_timeout =
|
|
IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg);
|
|
param->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg);
|
|
param->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg);
|
|
param->srq = IBA_GET(CM_REQ_SRQ, req_msg);
|
|
param->ppath_sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr;
|
|
param->ece.vendor_id = IBA_GET(CM_REQ_VENDOR_ID, req_msg);
|
|
param->ece.attr_mod = be32_to_cpu(req_msg->hdr.attr_mod);
|
|
|
|
work->cm_event.private_data =
|
|
IBA_GET_MEM_PTR(CM_REQ_PRIVATE_DATA, req_msg);
|
|
}
|
|
|
|
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);
|
|
if (!work)
|
|
return;
|
|
|
|
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);
|
|
IBA_SET(CM_MRA_MESSAGE_MRAED, mra_msg, msg_mraed);
|
|
IBA_SET(CM_MRA_LOCAL_COMM_ID, mra_msg,
|
|
be32_to_cpu(cm_id_priv->id.local_id));
|
|
IBA_SET(CM_MRA_REMOTE_COMM_ID, mra_msg,
|
|
be32_to_cpu(cm_id_priv->id.remote_id));
|
|
IBA_SET(CM_MRA_SERVICE_TIMEOUT, mra_msg, service_timeout);
|
|
|
|
if (private_data && private_data_len)
|
|
IBA_SET_MEM(CM_MRA_PRIVATE_DATA, mra_msg, 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, enum ib_cm_state state)
|
|
{
|
|
lockdep_assert_held(&cm_id_priv->lock);
|
|
|
|
cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid);
|
|
IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg,
|
|
be32_to_cpu(cm_id_priv->id.remote_id));
|
|
|
|
switch (state) {
|
|
case IB_CM_REQ_RCVD:
|
|
IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, be32_to_cpu(0));
|
|
IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ);
|
|
break;
|
|
case IB_CM_MRA_REQ_SENT:
|
|
IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
|
|
be32_to_cpu(cm_id_priv->id.local_id));
|
|
IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ);
|
|
break;
|
|
case IB_CM_REP_RCVD:
|
|
case IB_CM_MRA_REP_SENT:
|
|
IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
|
|
be32_to_cpu(cm_id_priv->id.local_id));
|
|
IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REP);
|
|
break;
|
|
default:
|
|
IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg,
|
|
be32_to_cpu(cm_id_priv->id.local_id));
|
|
IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg,
|
|
CM_MSG_RESPONSE_OTHER);
|
|
break;
|
|
}
|
|
|
|
IBA_SET(CM_REJ_REASON, rej_msg, reason);
|
|
if (ari && ari_length) {
|
|
IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length);
|
|
IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length);
|
|
}
|
|
|
|
if (private_data && private_data_len)
|
|
IBA_SET_MEM(CM_REJ_PRIVATE_DATA, rej_msg, 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->counters[CM_RECV_DUPLICATES][CM_REQ_COUNTER]);
|
|
|
|
/* Quick state check to discard duplicate REQs. */
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
if (cm_id_priv->id.state == IB_CM_REQ_RCVD) {
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
return;
|
|
}
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
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,
|
|
IB_CM_TIMEWAIT);
|
|
break;
|
|
default:
|
|
goto unlock;
|
|
}
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
trace_icm_send_dup_req(&cm_id_priv->id);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
goto free;
|
|
return;
|
|
|
|
unlock: spin_unlock_irq(&cm_id_priv->lock);
|
|
free: cm_free_response_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_acquire_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_remove_remote(cm_id_priv);
|
|
cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
|
|
timewait_info->work.remote_id);
|
|
|
|
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);
|
|
if (cur_cm_id_priv) {
|
|
ib_send_cm_dreq(&cur_cm_id_priv->id, NULL, 0);
|
|
cm_deref_id(cur_cm_id_priv);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Find matching listen request. */
|
|
listen_cm_id_priv = cm_find_listen(
|
|
cm_id_priv->id.device,
|
|
cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)));
|
|
if (!listen_cm_id_priv) {
|
|
cm_remove_remote(cm_id_priv);
|
|
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);
|
|
return NULL;
|
|
}
|
|
spin_unlock_irq(&cm.lock);
|
|
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 (!IBA_GET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg)) {
|
|
if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID,
|
|
req_msg)) == IB_LID_PERMISSIVE) {
|
|
IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg,
|
|
be16_to_cpu(ib_lid_be16(wc->slid)));
|
|
IBA_SET(CM_REQ_PRIMARY_SL, req_msg, wc->sl);
|
|
}
|
|
|
|
if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID,
|
|
req_msg)) == IB_LID_PERMISSIVE)
|
|
IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg,
|
|
wc->dlid_path_bits);
|
|
}
|
|
|
|
if (!IBA_GET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg)) {
|
|
if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID,
|
|
req_msg)) == IB_LID_PERMISSIVE) {
|
|
IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg,
|
|
be16_to_cpu(ib_lid_be16(wc->slid)));
|
|
IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, wc->sl);
|
|
}
|
|
|
|
if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID,
|
|
req_msg)) == IB_LID_PERMISSIVE)
|
|
IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg,
|
|
wc->dlid_path_bits);
|
|
}
|
|
}
|
|
|
|
static int cm_req_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
|
|
struct cm_req_msg *req_msg;
|
|
const struct ib_global_route *grh;
|
|
const struct ib_gid_attr *gid_attr;
|
|
int ret;
|
|
|
|
req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
|
|
cm_id_priv =
|
|
cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL);
|
|
if (IS_ERR(cm_id_priv))
|
|
return PTR_ERR(cm_id_priv);
|
|
|
|
cm_id_priv->id.remote_id =
|
|
cpu_to_be32(IBA_GET(CM_REQ_LOCAL_COMM_ID, req_msg));
|
|
cm_id_priv->id.service_id =
|
|
cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg));
|
|
cm_id_priv->id.service_mask = ~cpu_to_be64(0);
|
|
cm_id_priv->tid = req_msg->hdr.tid;
|
|
cm_id_priv->timeout_ms = cm_convert_to_ms(
|
|
IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg));
|
|
cm_id_priv->max_cm_retries = IBA_GET(CM_REQ_MAX_CM_RETRIES, req_msg);
|
|
cm_id_priv->remote_qpn =
|
|
cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg));
|
|
cm_id_priv->initiator_depth =
|
|
IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg);
|
|
cm_id_priv->responder_resources =
|
|
IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg);
|
|
cm_id_priv->path_mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg);
|
|
cm_id_priv->pkey = cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg));
|
|
cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg));
|
|
cm_id_priv->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg);
|
|
cm_id_priv->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg);
|
|
cm_id_priv->qp_type = cm_req_get_qp_type(req_msg);
|
|
|
|
ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
|
|
work->mad_recv_wc->recv_buf.grh,
|
|
&cm_id_priv->av);
|
|
if (ret)
|
|
goto destroy;
|
|
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);
|
|
cm_id_priv->timewait_info = NULL;
|
|
goto destroy;
|
|
}
|
|
cm_id_priv->timewait_info->work.remote_id = cm_id_priv->id.remote_id;
|
|
cm_id_priv->timewait_info->remote_ca_guid =
|
|
cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg));
|
|
cm_id_priv->timewait_info->remote_qpn = cm_id_priv->remote_qpn;
|
|
|
|
/*
|
|
* Note that the ID pointer is not in the xarray at this point,
|
|
* so this set is only visible to the local thread.
|
|
*/
|
|
cm_id_priv->id.state = IB_CM_REQ_RCVD;
|
|
|
|
listen_cm_id_priv = cm_match_req(work, cm_id_priv);
|
|
if (!listen_cm_id_priv) {
|
|
trace_icm_no_listener_err(&cm_id_priv->id);
|
|
cm_id_priv->id.state = IB_CM_IDLE;
|
|
ret = -EINVAL;
|
|
goto destroy;
|
|
}
|
|
|
|
memset(&work->path[0], 0, sizeof(work->path[0]));
|
|
if (cm_req_has_alt_path(req_msg))
|
|
memset(&work->path[1], 0, sizeof(work->path[1]));
|
|
grh = rdma_ah_read_grh(&cm_id_priv->av.ah_attr);
|
|
gid_attr = grh->sgid_attr;
|
|
|
|
if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE) {
|
|
work->path[0].rec_type =
|
|
sa_conv_gid_to_pathrec_type(gid_attr->gid_type);
|
|
} else {
|
|
cm_process_routed_req(req_msg, work->mad_recv_wc->wc);
|
|
cm_path_set_rec_type(
|
|
work->port->cm_dev->ib_device, work->port->port_num,
|
|
&work->path[0],
|
|
IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID,
|
|
req_msg));
|
|
}
|
|
if (cm_req_has_alt_path(req_msg))
|
|
work->path[1].rec_type = work->path[0].rec_type;
|
|
cm_format_paths_from_req(req_msg, &work->path[0],
|
|
&work->path[1]);
|
|
if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE)
|
|
sa_path_set_dmac(&work->path[0],
|
|
cm_id_priv->av.ah_attr.roce.dmac);
|
|
work->path[0].hop_limit = grh->hop_limit;
|
|
|
|
/* This destroy call is needed to pair with cm_init_av_for_response */
|
|
cm_destroy_av(&cm_id_priv->av);
|
|
ret = cm_init_av_by_path(&work->path[0], gid_attr, &cm_id_priv->av);
|
|
if (ret) {
|
|
int err;
|
|
|
|
err = rdma_query_gid(work->port->cm_dev->ib_device,
|
|
work->port->port_num, 0,
|
|
&work->path[0].sgid);
|
|
if (err)
|
|
ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_GID,
|
|
NULL, 0, NULL, 0);
|
|
else
|
|
ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_GID,
|
|
&work->path[0].sgid,
|
|
sizeof(work->path[0].sgid),
|
|
NULL, 0);
|
|
goto rejected;
|
|
}
|
|
if (cm_req_has_alt_path(req_msg)) {
|
|
ret = cm_init_av_by_path(&work->path[1], NULL,
|
|
&cm_id_priv->alt_av);
|
|
if (ret) {
|
|
ib_send_cm_rej(&cm_id_priv->id,
|
|
IB_CM_REJ_INVALID_ALT_GID,
|
|
&work->path[0].sgid,
|
|
sizeof(work->path[0].sgid), NULL, 0);
|
|
goto rejected;
|
|
}
|
|
}
|
|
|
|
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_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
|
|
|
|
/* Now MAD handlers can see the new ID */
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
cm_finalize_id(cm_id_priv);
|
|
|
|
/* Refcount belongs to the event, pairs with cm_process_work() */
|
|
refcount_inc(&cm_id_priv->refcount);
|
|
cm_queue_work_unlock(cm_id_priv, work);
|
|
/*
|
|
* Since this ID was just created and was not made visible to other MAD
|
|
* handlers until the cm_finalize_id() above we know that the
|
|
* cm_process_work() will deliver the event and the listen_cm_id
|
|
* embedded in the event can be derefed here.
|
|
*/
|
|
cm_deref_id(listen_cm_id_priv);
|
|
return 0;
|
|
|
|
rejected:
|
|
cm_deref_id(listen_cm_id_priv);
|
|
destroy:
|
|
ib_destroy_cm_id(&cm_id_priv->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_ece_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid,
|
|
param->ece.attr_mod);
|
|
IBA_SET(CM_REP_LOCAL_COMM_ID, rep_msg,
|
|
be32_to_cpu(cm_id_priv->id.local_id));
|
|
IBA_SET(CM_REP_REMOTE_COMM_ID, rep_msg,
|
|
be32_to_cpu(cm_id_priv->id.remote_id));
|
|
IBA_SET(CM_REP_STARTING_PSN, rep_msg, param->starting_psn);
|
|
IBA_SET(CM_REP_RESPONDER_RESOURCES, rep_msg,
|
|
param->responder_resources);
|
|
IBA_SET(CM_REP_TARGET_ACK_DELAY, rep_msg,
|
|
cm_id_priv->av.port->cm_dev->ack_delay);
|
|
IBA_SET(CM_REP_FAILOVER_ACCEPTED, rep_msg, param->failover_accepted);
|
|
IBA_SET(CM_REP_RNR_RETRY_COUNT, rep_msg, param->rnr_retry_count);
|
|
IBA_SET(CM_REP_LOCAL_CA_GUID, rep_msg,
|
|
be64_to_cpu(cm_id_priv->id.device->node_guid));
|
|
|
|
if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) {
|
|
IBA_SET(CM_REP_INITIATOR_DEPTH, rep_msg,
|
|
param->initiator_depth);
|
|
IBA_SET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg,
|
|
param->flow_control);
|
|
IBA_SET(CM_REP_SRQ, rep_msg, param->srq);
|
|
IBA_SET(CM_REP_LOCAL_QPN, rep_msg, param->qp_num);
|
|
} else {
|
|
IBA_SET(CM_REP_SRQ, rep_msg, 1);
|
|
IBA_SET(CM_REP_LOCAL_EE_CONTEXT_NUMBER, rep_msg, param->qp_num);
|
|
}
|
|
|
|
IBA_SET(CM_REP_VENDOR_ID_L, rep_msg, param->ece.vendor_id);
|
|
IBA_SET(CM_REP_VENDOR_ID_M, rep_msg, param->ece.vendor_id >> 8);
|
|
IBA_SET(CM_REP_VENDOR_ID_H, rep_msg, param->ece.vendor_id >> 16);
|
|
|
|
if (param->private_data && param->private_data_len)
|
|
IBA_SET_MEM(CM_REP_PRIVATE_DATA, rep_msg, 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) {
|
|
trace_icm_send_rep_err(cm_id_priv->id.local_id, cm_id->state);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
msg = cm_alloc_priv_msg(cm_id_priv);
|
|
if (IS_ERR(msg)) {
|
|
ret = PTR_ERR(msg);
|
|
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;
|
|
|
|
trace_icm_send_rep(cm_id);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
goto out_free;
|
|
|
|
cm_id->state = IB_CM_REP_SENT;
|
|
cm_id_priv->initiator_depth = param->initiator_depth;
|
|
cm_id_priv->responder_resources = param->responder_resources;
|
|
cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg));
|
|
WARN_ONCE(param->qp_num & 0xFF000000,
|
|
"IBTA declares QPN to be 24 bits, but it is 0x%X\n",
|
|
param->qp_num);
|
|
cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF);
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return 0;
|
|
|
|
out_free:
|
|
cm_free_priv_msg(msg);
|
|
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);
|
|
IBA_SET(CM_RTU_LOCAL_COMM_ID, rtu_msg,
|
|
be32_to_cpu(cm_id_priv->id.local_id));
|
|
IBA_SET(CM_RTU_REMOTE_COMM_ID, rtu_msg,
|
|
be32_to_cpu(cm_id_priv->id.remote_id));
|
|
|
|
if (private_data && private_data_len)
|
|
IBA_SET_MEM(CM_RTU_PRIVATE_DATA, rtu_msg, 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) {
|
|
trace_icm_send_cm_rtu_err(cm_id);
|
|
ret = -EINVAL;
|
|
goto error;
|
|
}
|
|
|
|
msg = cm_alloc_msg(cm_id_priv);
|
|
if (IS_ERR(msg)) {
|
|
ret = PTR_ERR(msg);
|
|
goto error;
|
|
}
|
|
|
|
cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
|
|
private_data, private_data_len);
|
|
|
|
trace_icm_send_rtu(cm_id);
|
|
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 =
|
|
cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg));
|
|
param->remote_qkey = IBA_GET(CM_REP_LOCAL_Q_KEY, rep_msg);
|
|
param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type));
|
|
param->starting_psn = IBA_GET(CM_REP_STARTING_PSN, rep_msg);
|
|
param->responder_resources = IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg);
|
|
param->initiator_depth = IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg);
|
|
param->target_ack_delay = IBA_GET(CM_REP_TARGET_ACK_DELAY, rep_msg);
|
|
param->failover_accepted = IBA_GET(CM_REP_FAILOVER_ACCEPTED, rep_msg);
|
|
param->flow_control = IBA_GET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg);
|
|
param->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg);
|
|
param->srq = IBA_GET(CM_REP_SRQ, rep_msg);
|
|
param->ece.vendor_id = IBA_GET(CM_REP_VENDOR_ID_H, rep_msg) << 16;
|
|
param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_M, rep_msg) << 8;
|
|
param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_L, rep_msg);
|
|
param->ece.attr_mod = be32_to_cpu(rep_msg->hdr.attr_mod);
|
|
|
|
work->cm_event.private_data =
|
|
IBA_GET_MEM_PTR(CM_REP_PRIVATE_DATA, rep_msg);
|
|
}
|
|
|
|
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(
|
|
cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)),
|
|
cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg)));
|
|
if (!cm_id_priv)
|
|
return;
|
|
|
|
atomic_long_inc(
|
|
&work->port->counters[CM_RECV_DUPLICATES][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);
|
|
|
|
trace_icm_send_dup_rep(&cm_id_priv->id);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
goto free;
|
|
goto deref;
|
|
|
|
unlock: spin_unlock_irq(&cm_id_priv->lock);
|
|
free: cm_free_response_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;
|
|
struct cm_id_private *cur_cm_id_priv;
|
|
struct cm_timewait_info *timewait_info;
|
|
|
|
rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(
|
|
cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)), 0);
|
|
if (!cm_id_priv) {
|
|
cm_dup_rep_handler(work);
|
|
trace_icm_remote_no_priv_err(
|
|
IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg));
|
|
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:
|
|
ret = -EINVAL;
|
|
trace_icm_rep_unknown_err(
|
|
IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg),
|
|
IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg),
|
|
cm_id_priv->id.state);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
goto error;
|
|
}
|
|
|
|
cm_id_priv->timewait_info->work.remote_id =
|
|
cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg));
|
|
cm_id_priv->timewait_info->remote_ca_guid =
|
|
cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg));
|
|
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;
|
|
trace_icm_insert_failed_err(
|
|
IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg));
|
|
goto error;
|
|
}
|
|
/* Check for a stale connection. */
|
|
timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info);
|
|
if (timewait_info) {
|
|
cm_remove_remote(cm_id_priv);
|
|
cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id,
|
|
timewait_info->work.remote_id);
|
|
|
|
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;
|
|
trace_icm_staleconn_err(
|
|
IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg),
|
|
IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg));
|
|
|
|
if (cur_cm_id_priv) {
|
|
ib_send_cm_dreq(&cur_cm_id_priv->id, NULL, 0);
|
|
cm_deref_id(cur_cm_id_priv);
|
|
}
|
|
|
|
goto error;
|
|
}
|
|
spin_unlock(&cm.lock);
|
|
|
|
cm_id_priv->id.state = IB_CM_REP_RCVD;
|
|
cm_id_priv->id.remote_id =
|
|
cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg));
|
|
cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type);
|
|
cm_id_priv->initiator_depth =
|
|
IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg);
|
|
cm_id_priv->responder_resources =
|
|
IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg);
|
|
cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg));
|
|
cm_id_priv->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg);
|
|
cm_id_priv->target_ack_delay =
|
|
IBA_GET(CM_REP_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);
|
|
|
|
ib_cancel_mad(cm_id_priv->msg);
|
|
cm_queue_work_unlock(cm_id_priv, work);
|
|
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;
|
|
|
|
/* 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->msg);
|
|
cm_queue_work_unlock(cm_id_priv, work);
|
|
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;
|
|
|
|
rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(
|
|
cpu_to_be32(IBA_GET(CM_RTU_REMOTE_COMM_ID, rtu_msg)),
|
|
cpu_to_be32(IBA_GET(CM_RTU_LOCAL_COMM_ID, rtu_msg)));
|
|
if (!cm_id_priv)
|
|
return -EINVAL;
|
|
|
|
work->cm_event.private_data =
|
|
IBA_GET_MEM_PTR(CM_RTU_PRIVATE_DATA, rtu_msg);
|
|
|
|
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->counters[CM_RECV_DUPLICATES]
|
|
[CM_RTU_COUNTER]);
|
|
goto out;
|
|
}
|
|
cm_id_priv->id.state = IB_CM_ESTABLISHED;
|
|
|
|
ib_cancel_mad(cm_id_priv->msg);
|
|
cm_queue_work_unlock(cm_id_priv, work);
|
|
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));
|
|
IBA_SET(CM_DREQ_LOCAL_COMM_ID, dreq_msg,
|
|
be32_to_cpu(cm_id_priv->id.local_id));
|
|
IBA_SET(CM_DREQ_REMOTE_COMM_ID, dreq_msg,
|
|
be32_to_cpu(cm_id_priv->id.remote_id));
|
|
IBA_SET(CM_DREQ_REMOTE_QPN_EECN, dreq_msg,
|
|
be32_to_cpu(cm_id_priv->remote_qpn));
|
|
|
|
if (private_data && private_data_len)
|
|
IBA_SET_MEM(CM_DREQ_PRIVATE_DATA, dreq_msg, private_data,
|
|
private_data_len);
|
|
}
|
|
|
|
static int cm_send_dreq_locked(struct cm_id_private *cm_id_priv,
|
|
const void *private_data, u8 private_data_len)
|
|
{
|
|
struct ib_mad_send_buf *msg;
|
|
int ret;
|
|
|
|
lockdep_assert_held(&cm_id_priv->lock);
|
|
|
|
if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE)
|
|
return -EINVAL;
|
|
|
|
if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
|
|
trace_icm_dreq_skipped(&cm_id_priv->id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
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->msg);
|
|
|
|
msg = cm_alloc_priv_msg(cm_id_priv);
|
|
if (IS_ERR(msg)) {
|
|
cm_enter_timewait(cm_id_priv);
|
|
return PTR_ERR(msg);
|
|
}
|
|
|
|
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;
|
|
|
|
trace_icm_send_dreq(&cm_id_priv->id);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret) {
|
|
cm_enter_timewait(cm_id_priv);
|
|
cm_free_priv_msg(msg);
|
|
return ret;
|
|
}
|
|
|
|
cm_id_priv->id.state = IB_CM_DREQ_SENT;
|
|
return 0;
|
|
}
|
|
|
|
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 =
|
|
container_of(cm_id, struct cm_id_private, id);
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
ret = cm_send_dreq_locked(cm_id_priv, private_data, private_data_len);
|
|
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);
|
|
IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg,
|
|
be32_to_cpu(cm_id_priv->id.local_id));
|
|
IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg,
|
|
be32_to_cpu(cm_id_priv->id.remote_id));
|
|
|
|
if (private_data && private_data_len)
|
|
IBA_SET_MEM(CM_DREP_PRIVATE_DATA, drep_msg, private_data,
|
|
private_data_len);
|
|
}
|
|
|
|
static int cm_send_drep_locked(struct cm_id_private *cm_id_priv,
|
|
void *private_data, u8 private_data_len)
|
|
{
|
|
struct ib_mad_send_buf *msg;
|
|
int ret;
|
|
|
|
lockdep_assert_held(&cm_id_priv->lock);
|
|
|
|
if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE)
|
|
return -EINVAL;
|
|
|
|
if (cm_id_priv->id.state != IB_CM_DREQ_RCVD) {
|
|
trace_icm_send_drep_err(&cm_id_priv->id);
|
|
kfree(private_data);
|
|
return -EINVAL;
|
|
}
|
|
|
|
cm_set_private_data(cm_id_priv, private_data, private_data_len);
|
|
cm_enter_timewait(cm_id_priv);
|
|
|
|
msg = cm_alloc_msg(cm_id_priv);
|
|
if (IS_ERR(msg))
|
|
return PTR_ERR(msg);
|
|
|
|
cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv,
|
|
private_data, private_data_len);
|
|
|
|
trace_icm_send_drep(&cm_id_priv->id);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret) {
|
|
cm_free_msg(msg);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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 =
|
|
container_of(cm_id, struct cm_id_private, id);
|
|
unsigned long flags;
|
|
void *data;
|
|
int ret;
|
|
|
|
data = cm_copy_private_data(private_data, private_data_len);
|
|
if (IS_ERR(data))
|
|
return PTR_ERR(data);
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
ret = cm_send_drep_locked(cm_id_priv, data, private_data_len);
|
|
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);
|
|
IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg,
|
|
IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg));
|
|
IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg,
|
|
IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg));
|
|
|
|
trace_icm_issue_drep(
|
|
IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg),
|
|
IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg));
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
cm_free_response_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;
|
|
|
|
dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(
|
|
cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)),
|
|
cpu_to_be32(IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg)));
|
|
if (!cm_id_priv) {
|
|
atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
|
|
[CM_DREQ_COUNTER]);
|
|
cm_issue_drep(work->port, work->mad_recv_wc);
|
|
trace_icm_no_priv_err(
|
|
IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg),
|
|
IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg));
|
|
return -EINVAL;
|
|
}
|
|
|
|
work->cm_event.private_data =
|
|
IBA_GET_MEM_PTR(CM_DREQ_PRIVATE_DATA, dreq_msg);
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
if (cm_id_priv->local_qpn !=
|
|
cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_QPN_EECN, 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->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->msg);
|
|
break;
|
|
case IB_CM_MRA_REP_RCVD:
|
|
break;
|
|
case IB_CM_TIMEWAIT:
|
|
atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
|
|
[CM_DREQ_COUNTER]);
|
|
msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc);
|
|
if (IS_ERR(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 (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) ||
|
|
ib_post_send_mad(msg, NULL))
|
|
cm_free_response_msg(msg);
|
|
goto deref;
|
|
case IB_CM_DREQ_RCVD:
|
|
atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
|
|
[CM_DREQ_COUNTER]);
|
|
goto unlock;
|
|
default:
|
|
trace_icm_dreq_unknown_err(&cm_id_priv->id);
|
|
goto unlock;
|
|
}
|
|
cm_id_priv->id.state = IB_CM_DREQ_RCVD;
|
|
cm_id_priv->tid = dreq_msg->hdr.tid;
|
|
cm_queue_work_unlock(cm_id_priv, work);
|
|
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;
|
|
|
|
drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(
|
|
cpu_to_be32(IBA_GET(CM_DREP_REMOTE_COMM_ID, drep_msg)),
|
|
cpu_to_be32(IBA_GET(CM_DREP_LOCAL_COMM_ID, drep_msg)));
|
|
if (!cm_id_priv)
|
|
return -EINVAL;
|
|
|
|
work->cm_event.private_data =
|
|
IBA_GET_MEM_PTR(CM_DREP_PRIVATE_DATA, drep_msg);
|
|
|
|
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->msg);
|
|
cm_queue_work_unlock(cm_id_priv, work);
|
|
return 0;
|
|
out:
|
|
cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int cm_send_rej_locked(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)
|
|
{
|
|
enum ib_cm_state state = cm_id_priv->id.state;
|
|
struct ib_mad_send_buf *msg;
|
|
int ret;
|
|
|
|
lockdep_assert_held(&cm_id_priv->lock);
|
|
|
|
if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) ||
|
|
(ari && ari_length > IB_CM_REJ_ARI_LENGTH))
|
|
return -EINVAL;
|
|
|
|
switch (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:
|
|
cm_reset_to_idle(cm_id_priv);
|
|
msg = cm_alloc_msg(cm_id_priv);
|
|
if (IS_ERR(msg))
|
|
return PTR_ERR(msg);
|
|
cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason,
|
|
ari, ari_length, private_data, private_data_len,
|
|
state);
|
|
break;
|
|
case IB_CM_REP_SENT:
|
|
case IB_CM_MRA_REP_RCVD:
|
|
cm_enter_timewait(cm_id_priv);
|
|
msg = cm_alloc_msg(cm_id_priv);
|
|
if (IS_ERR(msg))
|
|
return PTR_ERR(msg);
|
|
cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason,
|
|
ari, ari_length, private_data, private_data_len,
|
|
state);
|
|
break;
|
|
default:
|
|
trace_icm_send_unknown_rej_err(&cm_id_priv->id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
trace_icm_send_rej(&cm_id_priv->id, reason);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret) {
|
|
cm_free_msg(msg);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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 =
|
|
container_of(cm_id, struct cm_id_private, id);
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
ret = cm_send_rej_locked(cm_id_priv, reason, ari, ari_length,
|
|
private_data, private_data_len);
|
|
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 = IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg);
|
|
param->ari_length = IBA_GET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg);
|
|
param->reason = IBA_GET(CM_REJ_REASON, rej_msg);
|
|
work->cm_event.private_data =
|
|
IBA_GET_MEM_PTR(CM_REJ_PRIVATE_DATA, rej_msg);
|
|
}
|
|
|
|
static struct cm_id_private *cm_acquire_rejected_id(struct cm_rej_msg *rej_msg)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
__be32 remote_id;
|
|
|
|
remote_id = cpu_to_be32(IBA_GET(CM_REJ_LOCAL_COMM_ID, rej_msg));
|
|
|
|
if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_TIMEOUT) {
|
|
cm_id_priv = cm_find_remote_id(
|
|
*((__be64 *)IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg)),
|
|
remote_id);
|
|
} else if (IBA_GET(CM_REJ_MESSAGE_REJECTED, rej_msg) ==
|
|
CM_MSG_RESPONSE_REQ)
|
|
cm_id_priv = cm_acquire_id(
|
|
cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)),
|
|
0);
|
|
else
|
|
cm_id_priv = cm_acquire_id(
|
|
cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)),
|
|
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;
|
|
|
|
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->msg);
|
|
fallthrough;
|
|
case IB_CM_REQ_RCVD:
|
|
case IB_CM_MRA_REQ_SENT:
|
|
if (IBA_GET(CM_REJ_REASON, rej_msg) == 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->msg);
|
|
fallthrough;
|
|
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->msg);
|
|
cm_enter_timewait(cm_id_priv);
|
|
break;
|
|
}
|
|
fallthrough;
|
|
default:
|
|
trace_icm_rej_unknown_err(&cm_id_priv->id);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
goto out;
|
|
}
|
|
|
|
cm_queue_work_unlock(cm_id_priv, work);
|
|
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;
|
|
}
|
|
fallthrough;
|
|
default:
|
|
trace_icm_send_mra_unknown_err(&cm_id_priv->id);
|
|
ret = -EINVAL;
|
|
goto error_unlock;
|
|
}
|
|
|
|
if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) {
|
|
msg = cm_alloc_msg(cm_id_priv);
|
|
if (IS_ERR(msg)) {
|
|
ret = PTR_ERR(msg);
|
|
goto error_unlock;
|
|
}
|
|
|
|
cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
|
|
msg_response, service_timeout,
|
|
private_data, private_data_len);
|
|
trace_icm_send_mra(cm_id);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
goto error_free_msg;
|
|
}
|
|
|
|
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;
|
|
|
|
error_free_msg:
|
|
cm_free_msg(msg);
|
|
error_unlock:
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
kfree(data);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_mra);
|
|
|
|
static struct cm_id_private *cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
|
|
{
|
|
switch (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg)) {
|
|
case CM_MSG_RESPONSE_REQ:
|
|
return cm_acquire_id(
|
|
cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)),
|
|
0);
|
|
case CM_MSG_RESPONSE_REP:
|
|
case CM_MSG_RESPONSE_OTHER:
|
|
return cm_acquire_id(
|
|
cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)),
|
|
cpu_to_be32(IBA_GET(CM_MRA_LOCAL_COMM_ID, mra_msg)));
|
|
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;
|
|
|
|
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 =
|
|
IBA_GET_MEM_PTR(CM_MRA_PRIVATE_DATA, mra_msg);
|
|
work->cm_event.param.mra_rcvd.service_timeout =
|
|
IBA_GET(CM_MRA_SERVICE_TIMEOUT, mra_msg);
|
|
timeout = cm_convert_to_ms(IBA_GET(CM_MRA_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 (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
|
|
CM_MSG_RESPONSE_REQ ||
|
|
ib_modify_mad(cm_id_priv->msg, timeout))
|
|
goto out;
|
|
cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
|
|
break;
|
|
case IB_CM_REP_SENT:
|
|
if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
|
|
CM_MSG_RESPONSE_REP ||
|
|
ib_modify_mad(cm_id_priv->msg, timeout))
|
|
goto out;
|
|
cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
|
|
break;
|
|
case IB_CM_ESTABLISHED:
|
|
if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
|
|
CM_MSG_RESPONSE_OTHER ||
|
|
cm_id_priv->id.lap_state != IB_CM_LAP_SENT ||
|
|
ib_modify_mad(cm_id_priv->msg, timeout)) {
|
|
if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
|
|
atomic_long_inc(
|
|
&work->port->counters[CM_RECV_DUPLICATES]
|
|
[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->counters[CM_RECV_DUPLICATES]
|
|
[CM_MRA_COUNTER]);
|
|
fallthrough;
|
|
default:
|
|
trace_icm_mra_unknown_err(&cm_id_priv->id);
|
|
goto out;
|
|
}
|
|
|
|
cm_id_priv->msg->context[1] = (void *) (unsigned long)
|
|
cm_id_priv->id.state;
|
|
cm_queue_work_unlock(cm_id_priv, work);
|
|
return 0;
|
|
out:
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void cm_format_path_lid_from_lap(struct cm_lap_msg *lap_msg,
|
|
struct sa_path_rec *path)
|
|
{
|
|
u32 lid;
|
|
|
|
if (path->rec_type != SA_PATH_REC_TYPE_OPA) {
|
|
sa_path_set_dlid(path, IBA_GET(CM_LAP_ALTERNATE_LOCAL_PORT_LID,
|
|
lap_msg));
|
|
sa_path_set_slid(path, IBA_GET(CM_LAP_ALTERNATE_REMOTE_PORT_LID,
|
|
lap_msg));
|
|
} else {
|
|
lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
|
|
CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg));
|
|
sa_path_set_dlid(path, lid);
|
|
|
|
lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR(
|
|
CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg));
|
|
sa_path_set_slid(path, lid);
|
|
}
|
|
}
|
|
|
|
static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv,
|
|
struct sa_path_rec *path,
|
|
struct cm_lap_msg *lap_msg)
|
|
{
|
|
path->dgid = *IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg);
|
|
path->sgid =
|
|
*IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg);
|
|
path->flow_label =
|
|
cpu_to_be32(IBA_GET(CM_LAP_ALTERNATE_FLOW_LABEL, lap_msg));
|
|
path->hop_limit = IBA_GET(CM_LAP_ALTERNATE_HOP_LIMIT, lap_msg);
|
|
path->traffic_class = IBA_GET(CM_LAP_ALTERNATE_TRAFFIC_CLASS, lap_msg);
|
|
path->reversible = 1;
|
|
path->pkey = cm_id_priv->pkey;
|
|
path->sl = IBA_GET(CM_LAP_ALTERNATE_SL, lap_msg);
|
|
path->mtu_selector = IB_SA_EQ;
|
|
path->mtu = cm_id_priv->path_mtu;
|
|
path->rate_selector = IB_SA_EQ;
|
|
path->rate = IBA_GET(CM_LAP_ALTERNATE_PACKET_RATE, lap_msg);
|
|
path->packet_life_time_selector = IB_SA_EQ;
|
|
path->packet_life_time =
|
|
IBA_GET(CM_LAP_ALTERNATE_LOCAL_ACK_TIMEOUT, lap_msg);
|
|
path->packet_life_time -= (path->packet_life_time > 0);
|
|
cm_format_path_lid_from_lap(lap_msg, path);
|
|
}
|
|
|
|
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;
|
|
struct rdma_ah_attr ah_attr;
|
|
struct cm_av alt_av = {};
|
|
int ret;
|
|
|
|
/* Currently Alternate path messages are not supported for
|
|
* RoCE link layer.
|
|
*/
|
|
if (rdma_protocol_roce(work->port->cm_dev->ib_device,
|
|
work->port->port_num))
|
|
return -EINVAL;
|
|
|
|
/* 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(
|
|
cpu_to_be32(IBA_GET(CM_LAP_REMOTE_COMM_ID, lap_msg)),
|
|
cpu_to_be32(IBA_GET(CM_LAP_LOCAL_COMM_ID, lap_msg)));
|
|
if (!cm_id_priv)
|
|
return -EINVAL;
|
|
|
|
param = &work->cm_event.param.lap_rcvd;
|
|
memset(&work->path[0], 0, sizeof(work->path[1]));
|
|
cm_path_set_rec_type(work->port->cm_dev->ib_device,
|
|
work->port->port_num, &work->path[0],
|
|
IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID,
|
|
lap_msg));
|
|
param->alternate_path = &work->path[0];
|
|
cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg);
|
|
work->cm_event.private_data =
|
|
IBA_GET_MEM_PTR(CM_LAP_PRIVATE_DATA, lap_msg);
|
|
|
|
ret = ib_init_ah_attr_from_wc(work->port->cm_dev->ib_device,
|
|
work->port->port_num,
|
|
work->mad_recv_wc->wc,
|
|
work->mad_recv_wc->recv_buf.grh,
|
|
&ah_attr);
|
|
if (ret)
|
|
goto deref;
|
|
|
|
ret = cm_init_av_by_path(param->alternate_path, NULL, &alt_av);
|
|
if (ret) {
|
|
rdma_destroy_ah_attr(&ah_attr);
|
|
return -EINVAL;
|
|
}
|
|
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
cm_init_av_for_lap(work->port, work->mad_recv_wc->wc,
|
|
&ah_attr, &cm_id_priv->av);
|
|
cm_move_av_from_path(&cm_id_priv->alt_av, &alt_av);
|
|
|
|
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->counters[CM_RECV_DUPLICATES]
|
|
[CM_LAP_COUNTER]);
|
|
msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc);
|
|
if (IS_ERR(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 (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) ||
|
|
ib_post_send_mad(msg, NULL))
|
|
cm_free_response_msg(msg);
|
|
goto deref;
|
|
case IB_CM_LAP_RCVD:
|
|
atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
|
|
[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_queue_work_unlock(cm_id_priv, work);
|
|
return 0;
|
|
|
|
unlock: spin_unlock_irq(&cm_id_priv->lock);
|
|
deref: cm_deref_id(cm_id_priv);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int cm_apr_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv;
|
|
struct cm_apr_msg *apr_msg;
|
|
|
|
/* Currently Alternate path messages are not supported for
|
|
* RoCE link layer.
|
|
*/
|
|
if (rdma_protocol_roce(work->port->cm_dev->ib_device,
|
|
work->port->port_num))
|
|
return -EINVAL;
|
|
|
|
apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad;
|
|
cm_id_priv = cm_acquire_id(
|
|
cpu_to_be32(IBA_GET(CM_APR_REMOTE_COMM_ID, apr_msg)),
|
|
cpu_to_be32(IBA_GET(CM_APR_LOCAL_COMM_ID, apr_msg)));
|
|
if (!cm_id_priv)
|
|
return -EINVAL; /* Unmatched reply. */
|
|
|
|
work->cm_event.param.apr_rcvd.ap_status =
|
|
IBA_GET(CM_APR_AR_STATUS, apr_msg);
|
|
work->cm_event.param.apr_rcvd.apr_info =
|
|
IBA_GET_MEM_PTR(CM_APR_ADDITIONAL_INFORMATION, apr_msg);
|
|
work->cm_event.param.apr_rcvd.info_len =
|
|
IBA_GET(CM_APR_ADDITIONAL_INFORMATION_LENGTH, apr_msg);
|
|
work->cm_event.private_data =
|
|
IBA_GET_MEM_PTR(CM_APR_PRIVATE_DATA, apr_msg);
|
|
|
|
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->msg);
|
|
cm_queue_work_unlock(cm_id_priv, work);
|
|
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;
|
|
|
|
timewait_info = container_of(work, 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;
|
|
cm_queue_work_unlock(cm_id_priv, work);
|
|
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));
|
|
IBA_SET(CM_SIDR_REQ_REQUESTID, sidr_req_msg,
|
|
be32_to_cpu(cm_id_priv->id.local_id));
|
|
IBA_SET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg,
|
|
be16_to_cpu(param->path->pkey));
|
|
IBA_SET(CM_SIDR_REQ_SERVICEID, sidr_req_msg,
|
|
be64_to_cpu(param->service_id));
|
|
|
|
if (param->private_data && param->private_data_len)
|
|
IBA_SET_MEM(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg,
|
|
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;
|
|
struct cm_av av = {};
|
|
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, param->sgid_attr, &av);
|
|
if (ret)
|
|
return ret;
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
cm_move_av_from_path(&cm_id_priv->av, &av);
|
|
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;
|
|
if (cm_id->state != IB_CM_IDLE) {
|
|
ret = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
msg = cm_alloc_priv_msg(cm_id_priv);
|
|
if (IS_ERR(msg)) {
|
|
ret = PTR_ERR(msg);
|
|
goto out_unlock;
|
|
}
|
|
|
|
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;
|
|
|
|
trace_icm_send_sidr_req(&cm_id_priv->id);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret)
|
|
goto out_free;
|
|
cm_id->state = IB_CM_SIDR_REQ_SENT;
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return 0;
|
|
out_free:
|
|
cm_free_priv_msg(msg);
|
|
out_unlock:
|
|
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_send_cm_sidr_req);
|
|
|
|
static void cm_format_sidr_req_event(struct cm_work *work,
|
|
const struct cm_id_private *rx_cm_id,
|
|
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 = IBA_GET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg);
|
|
param->listen_id = listen_id;
|
|
param->service_id =
|
|
cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg));
|
|
param->bth_pkey = cm_get_bth_pkey(work);
|
|
param->port = work->port->port_num;
|
|
param->sgid_attr = rx_cm_id->av.ah_attr.grh.sgid_attr;
|
|
work->cm_event.private_data =
|
|
IBA_GET_MEM_PTR(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg);
|
|
}
|
|
|
|
static int cm_sidr_req_handler(struct cm_work *work)
|
|
{
|
|
struct cm_id_private *cm_id_priv, *listen_cm_id_priv;
|
|
struct cm_sidr_req_msg *sidr_req_msg;
|
|
struct ib_wc *wc;
|
|
int ret;
|
|
|
|
cm_id_priv =
|
|
cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL);
|
|
if (IS_ERR(cm_id_priv))
|
|
return PTR_ERR(cm_id_priv);
|
|
|
|
/* Record SGID/SLID and request ID for lookup. */
|
|
sidr_req_msg = (struct cm_sidr_req_msg *)
|
|
work->mad_recv_wc->recv_buf.mad;
|
|
|
|
cm_id_priv->id.remote_id =
|
|
cpu_to_be32(IBA_GET(CM_SIDR_REQ_REQUESTID, sidr_req_msg));
|
|
cm_id_priv->id.service_id =
|
|
cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg));
|
|
cm_id_priv->id.service_mask = ~cpu_to_be64(0);
|
|
cm_id_priv->tid = sidr_req_msg->hdr.tid;
|
|
|
|
wc = work->mad_recv_wc->wc;
|
|
cm_id_priv->sidr_slid = wc->slid;
|
|
ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
|
|
work->mad_recv_wc->recv_buf.grh,
|
|
&cm_id_priv->av);
|
|
if (ret)
|
|
goto out;
|
|
|
|
spin_lock_irq(&cm.lock);
|
|
listen_cm_id_priv = cm_insert_remote_sidr(cm_id_priv);
|
|
if (listen_cm_id_priv) {
|
|
spin_unlock_irq(&cm.lock);
|
|
atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES]
|
|
[CM_SIDR_REQ_COUNTER]);
|
|
goto out; /* Duplicate message. */
|
|
}
|
|
cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD;
|
|
listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
|
|
cm_id_priv->id.service_id);
|
|
if (!listen_cm_id_priv) {
|
|
spin_unlock_irq(&cm.lock);
|
|
ib_send_cm_sidr_rep(&cm_id_priv->id,
|
|
&(struct ib_cm_sidr_rep_param){
|
|
.status = IB_SIDR_UNSUPPORTED });
|
|
goto out; /* No match. */
|
|
}
|
|
spin_unlock_irq(&cm.lock);
|
|
|
|
cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler;
|
|
cm_id_priv->id.context = listen_cm_id_priv->id.context;
|
|
|
|
/*
|
|
* A SIDR ID does not need to be in the xarray since it does not receive
|
|
* mads, is not placed in the remote_id or remote_qpn rbtree, and does
|
|
* not enter timewait.
|
|
*/
|
|
|
|
cm_format_sidr_req_event(work, cm_id_priv, &listen_cm_id_priv->id);
|
|
ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event);
|
|
cm_free_work(work);
|
|
/*
|
|
* A pointer to the listen_cm_id is held in the event, so this deref
|
|
* must be after the event is delivered above.
|
|
*/
|
|
cm_deref_id(listen_cm_id_priv);
|
|
if (ret)
|
|
cm_destroy_id(&cm_id_priv->id, ret);
|
|
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_ece_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID,
|
|
cm_id_priv->tid, param->ece.attr_mod);
|
|
IBA_SET(CM_SIDR_REP_REQUESTID, sidr_rep_msg,
|
|
be32_to_cpu(cm_id_priv->id.remote_id));
|
|
IBA_SET(CM_SIDR_REP_STATUS, sidr_rep_msg, param->status);
|
|
IBA_SET(CM_SIDR_REP_QPN, sidr_rep_msg, param->qp_num);
|
|
IBA_SET(CM_SIDR_REP_SERVICEID, sidr_rep_msg,
|
|
be64_to_cpu(cm_id_priv->id.service_id));
|
|
IBA_SET(CM_SIDR_REP_Q_KEY, sidr_rep_msg, param->qkey);
|
|
IBA_SET(CM_SIDR_REP_VENDOR_ID_L, sidr_rep_msg,
|
|
param->ece.vendor_id & 0xFF);
|
|
IBA_SET(CM_SIDR_REP_VENDOR_ID_H, sidr_rep_msg,
|
|
(param->ece.vendor_id >> 8) & 0xFF);
|
|
|
|
if (param->info && param->info_length)
|
|
IBA_SET_MEM(CM_SIDR_REP_ADDITIONAL_INFORMATION, sidr_rep_msg,
|
|
param->info, param->info_length);
|
|
|
|
if (param->private_data && param->private_data_len)
|
|
IBA_SET_MEM(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg,
|
|
param->private_data, param->private_data_len);
|
|
}
|
|
|
|
static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv,
|
|
struct ib_cm_sidr_rep_param *param)
|
|
{
|
|
struct ib_mad_send_buf *msg;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
lockdep_assert_held(&cm_id_priv->lock);
|
|
|
|
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;
|
|
|
|
if (cm_id_priv->id.state != IB_CM_SIDR_REQ_RCVD)
|
|
return -EINVAL;
|
|
|
|
msg = cm_alloc_msg(cm_id_priv);
|
|
if (IS_ERR(msg))
|
|
return PTR_ERR(msg);
|
|
|
|
cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv,
|
|
param);
|
|
trace_icm_send_sidr_rep(&cm_id_priv->id);
|
|
ret = ib_post_send_mad(msg, NULL);
|
|
if (ret) {
|
|
cm_free_msg(msg);
|
|
return ret;
|
|
}
|
|
cm_id_priv->id.state = IB_CM_IDLE;
|
|
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;
|
|
}
|
|
|
|
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 =
|
|
container_of(cm_id, struct cm_id_private, id);
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&cm_id_priv->lock, flags);
|
|
ret = cm_send_sidr_rep_locked(cm_id_priv, param);
|
|
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,
|
|
const struct cm_id_private *cm_id_priv)
|
|
{
|
|
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 = IBA_GET(CM_SIDR_REP_STATUS, sidr_rep_msg);
|
|
param->qkey = IBA_GET(CM_SIDR_REP_Q_KEY, sidr_rep_msg);
|
|
param->qpn = IBA_GET(CM_SIDR_REP_QPN, sidr_rep_msg);
|
|
param->info = IBA_GET_MEM_PTR(CM_SIDR_REP_ADDITIONAL_INFORMATION,
|
|
sidr_rep_msg);
|
|
param->info_len = IBA_GET(CM_SIDR_REP_ADDITIONAL_INFORMATION_LENGTH,
|
|
sidr_rep_msg);
|
|
param->sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr;
|
|
work->cm_event.private_data =
|
|
IBA_GET_MEM_PTR(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg);
|
|
}
|
|
|
|
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(
|
|
cpu_to_be32(IBA_GET(CM_SIDR_REP_REQUESTID, sidr_rep_msg)), 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->msg);
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
|
|
cm_format_sidr_rep_event(work, cm_id_priv);
|
|
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 cm_id_private *cm_id_priv,
|
|
struct ib_mad_send_buf *msg,
|
|
enum ib_cm_state state,
|
|
enum ib_wc_status wc_status)
|
|
{
|
|
struct ib_cm_event cm_event = {};
|
|
int ret;
|
|
|
|
/* Discard old sends or ones without a response. */
|
|
spin_lock_irq(&cm_id_priv->lock);
|
|
if (msg != cm_id_priv->msg) {
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
cm_free_msg(msg);
|
|
return;
|
|
}
|
|
cm_free_priv_msg(msg);
|
|
|
|
if (state != cm_id_priv->id.state || wc_status == IB_WC_SUCCESS ||
|
|
wc_status == IB_WC_WR_FLUSH_ERR)
|
|
goto out_unlock;
|
|
|
|
trace_icm_mad_send_err(state, wc_status);
|
|
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 out_unlock;
|
|
}
|
|
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);
|
|
if (ret)
|
|
ib_destroy_cm_id(&cm_id_priv->id);
|
|
return;
|
|
out_unlock:
|
|
spin_unlock_irq(&cm_id_priv->lock);
|
|
}
|
|
|
|
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_id_private *cm_id_priv = msg->context[0];
|
|
enum ib_cm_state state =
|
|
(enum ib_cm_state)(unsigned long)msg->context[1];
|
|
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 (!cm_id_priv && (attr_index != CM_REJ_COUNTER))
|
|
msg->retries = 1;
|
|
|
|
atomic_long_add(1 + msg->retries, &port->counters[CM_XMIT][attr_index]);
|
|
if (msg->retries)
|
|
atomic_long_add(msg->retries,
|
|
&port->counters[CM_XMIT_RETRIES][attr_index]);
|
|
|
|
if (cm_id_priv)
|
|
cm_process_send_error(cm_id_priv, msg, state,
|
|
mad_send_wc->status);
|
|
else
|
|
cm_free_response_msg(msg);
|
|
}
|
|
|
|
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:
|
|
trace_icm_handler_err(work->cm_event.event);
|
|
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:
|
|
trace_icm_establish_err(cm_id);
|
|
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_irqsave(&cm.lock, flags);
|
|
if (!cm_dev->going_down) {
|
|
queue_delayed_work(cm.wq, &work->work, 0);
|
|
} else {
|
|
kfree(work);
|
|
ret = -ENODEV;
|
|
}
|
|
spin_unlock_irqrestore(&cm.lock, flags);
|
|
|
|
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_send_buf *send_buf,
|
|
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;
|
|
bool alt_path = false;
|
|
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:
|
|
alt_path = cm_req_has_alt_path((struct cm_req_msg *)
|
|
mad_recv_wc->recv_buf.mad);
|
|
paths = 1 + (alt_path != 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->counters[CM_RECV][attr_id - CM_ATTR_ID_OFFSET]);
|
|
|
|
work = kmalloc(struct_size(work, path, 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;
|
|
if (cm_id_priv->av.port)
|
|
qp_attr->port_num = cm_id_priv->av.port->port_num;
|
|
ret = 0;
|
|
break;
|
|
default:
|
|
trace_icm_qp_init_err(&cm_id_priv->id);
|
|
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 (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr) &&
|
|
cm_id_priv->alt_av.port) {
|
|
*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:
|
|
trace_icm_qp_rtr_err(&cm_id_priv->id);
|
|
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;
|
|
fallthrough;
|
|
case IB_QPT_XRC_TGT:
|
|
*qp_attr_mask |= IB_QP_TIMEOUT;
|
|
qp_attr->timeout = cm_id_priv->av.timeout;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr)) {
|
|
*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;
|
|
if (cm_id_priv->alt_av.port)
|
|
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:
|
|
trace_icm_qp_rts_err(&cm_id_priv->id);
|
|
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 ib_device *ibdev, u32 port_num,
|
|
struct ib_port_attribute *attr, char *buf)
|
|
{
|
|
struct cm_counter_attribute *cm_attr =
|
|
container_of(attr, struct cm_counter_attribute, attr);
|
|
struct cm_device *cm_dev = ib_get_client_data(ibdev, &cm_client);
|
|
|
|
if (WARN_ON(!cm_dev))
|
|
return -EINVAL;
|
|
|
|
return sysfs_emit(
|
|
buf, "%ld\n",
|
|
atomic_long_read(
|
|
&cm_dev->port[port_num - 1]
|
|
->counters[cm_attr->group][cm_attr->index]));
|
|
}
|
|
|
|
#define CM_COUNTER_ATTR(_name, _group, _index) \
|
|
{ \
|
|
.attr = __ATTR(_name, 0444, cm_show_counter, NULL), \
|
|
.group = _group, .index = _index \
|
|
}
|
|
|
|
#define CM_COUNTER_GROUP(_group, _name) \
|
|
static struct cm_counter_attribute cm_counter_attr_##_group[] = { \
|
|
CM_COUNTER_ATTR(req, _group, CM_REQ_COUNTER), \
|
|
CM_COUNTER_ATTR(mra, _group, CM_MRA_COUNTER), \
|
|
CM_COUNTER_ATTR(rej, _group, CM_REJ_COUNTER), \
|
|
CM_COUNTER_ATTR(rep, _group, CM_REP_COUNTER), \
|
|
CM_COUNTER_ATTR(rtu, _group, CM_RTU_COUNTER), \
|
|
CM_COUNTER_ATTR(dreq, _group, CM_DREQ_COUNTER), \
|
|
CM_COUNTER_ATTR(drep, _group, CM_DREP_COUNTER), \
|
|
CM_COUNTER_ATTR(sidr_req, _group, CM_SIDR_REQ_COUNTER), \
|
|
CM_COUNTER_ATTR(sidr_rep, _group, CM_SIDR_REP_COUNTER), \
|
|
CM_COUNTER_ATTR(lap, _group, CM_LAP_COUNTER), \
|
|
CM_COUNTER_ATTR(apr, _group, CM_APR_COUNTER), \
|
|
}; \
|
|
static struct attribute *cm_counter_attrs_##_group[] = { \
|
|
&cm_counter_attr_##_group[0].attr.attr, \
|
|
&cm_counter_attr_##_group[1].attr.attr, \
|
|
&cm_counter_attr_##_group[2].attr.attr, \
|
|
&cm_counter_attr_##_group[3].attr.attr, \
|
|
&cm_counter_attr_##_group[4].attr.attr, \
|
|
&cm_counter_attr_##_group[5].attr.attr, \
|
|
&cm_counter_attr_##_group[6].attr.attr, \
|
|
&cm_counter_attr_##_group[7].attr.attr, \
|
|
&cm_counter_attr_##_group[8].attr.attr, \
|
|
&cm_counter_attr_##_group[9].attr.attr, \
|
|
&cm_counter_attr_##_group[10].attr.attr, \
|
|
NULL, \
|
|
}; \
|
|
static const struct attribute_group cm_counter_group_##_group = { \
|
|
.name = _name, \
|
|
.attrs = cm_counter_attrs_##_group, \
|
|
};
|
|
|
|
CM_COUNTER_GROUP(CM_XMIT, "cm_tx_msgs")
|
|
CM_COUNTER_GROUP(CM_XMIT_RETRIES, "cm_tx_retries")
|
|
CM_COUNTER_GROUP(CM_RECV, "cm_rx_msgs")
|
|
CM_COUNTER_GROUP(CM_RECV_DUPLICATES, "cm_rx_duplicates")
|
|
|
|
static const struct attribute_group *cm_counter_groups[] = {
|
|
&cm_counter_group_CM_XMIT,
|
|
&cm_counter_group_CM_XMIT_RETRIES,
|
|
&cm_counter_group_CM_RECV,
|
|
&cm_counter_group_CM_RECV_DUPLICATES,
|
|
NULL,
|
|
};
|
|
|
|
static int 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;
|
|
u32 i;
|
|
|
|
cm_dev = kzalloc(struct_size(cm_dev, port, ib_device->phys_port_cnt),
|
|
GFP_KERNEL);
|
|
if (!cm_dev)
|
|
return -ENOMEM;
|
|
|
|
kref_init(&cm_dev->kref);
|
|
spin_lock_init(&cm_dev->mad_agent_lock);
|
|
cm_dev->ib_device = ib_device;
|
|
cm_dev->ack_delay = ib_device->attrs.local_ca_ack_delay;
|
|
cm_dev->going_down = 0;
|
|
|
|
ib_set_client_data(ib_device, &cm_client, cm_dev);
|
|
|
|
set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
|
|
rdma_for_each_port (ib_device, i) {
|
|
if (!rdma_cap_ib_cm(ib_device, i))
|
|
continue;
|
|
|
|
port = kzalloc(sizeof *port, GFP_KERNEL);
|
|
if (!port) {
|
|
ret = -ENOMEM;
|
|
goto error1;
|
|
}
|
|
|
|
cm_dev->port[i-1] = port;
|
|
port->cm_dev = cm_dev;
|
|
port->port_num = i;
|
|
|
|
ret = ib_port_register_client_groups(ib_device, i,
|
|
cm_counter_groups);
|
|
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)) {
|
|
ret = PTR_ERR(port->mad_agent);
|
|
goto error2;
|
|
}
|
|
|
|
ret = ib_modify_port(ib_device, i, 0, &port_modify);
|
|
if (ret)
|
|
goto error3;
|
|
|
|
count++;
|
|
}
|
|
|
|
if (!count) {
|
|
ret = -EOPNOTSUPP;
|
|
goto free;
|
|
}
|
|
|
|
write_lock_irqsave(&cm.device_lock, flags);
|
|
list_add_tail(&cm_dev->list, &cm.device_list);
|
|
write_unlock_irqrestore(&cm.device_lock, flags);
|
|
return 0;
|
|
|
|
error3:
|
|
ib_unregister_mad_agent(port->mad_agent);
|
|
error2:
|
|
ib_port_unregister_client_groups(ib_device, i, cm_counter_groups);
|
|
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);
|
|
ib_port_unregister_client_groups(ib_device, i,
|
|
cm_counter_groups);
|
|
}
|
|
free:
|
|
cm_device_put(cm_dev);
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
u32 i;
|
|
|
|
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);
|
|
|
|
rdma_for_each_port (ib_device, i) {
|
|
struct ib_mad_agent *mad_agent;
|
|
|
|
if (!rdma_cap_ib_cm(ib_device, i))
|
|
continue;
|
|
|
|
port = cm_dev->port[i-1];
|
|
mad_agent = port->mad_agent;
|
|
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);
|
|
/*
|
|
* The above ensures no call paths from the work are running,
|
|
* the remaining paths all take the mad_agent_lock.
|
|
*/
|
|
spin_lock(&cm_dev->mad_agent_lock);
|
|
port->mad_agent = NULL;
|
|
spin_unlock(&cm_dev->mad_agent_lock);
|
|
ib_unregister_mad_agent(mad_agent);
|
|
ib_port_unregister_client_groups(ib_device, i,
|
|
cm_counter_groups);
|
|
}
|
|
|
|
cm_device_put(cm_dev);
|
|
}
|
|
|
|
static int __init ib_cm_init(void)
|
|
{
|
|
int ret;
|
|
|
|
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;
|
|
xa_init_flags(&cm.local_id_table, XA_FLAGS_ALLOC);
|
|
get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand);
|
|
INIT_LIST_HEAD(&cm.timewait_list);
|
|
|
|
cm.wq = alloc_workqueue("ib_cm", 0, 1);
|
|
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:
|
|
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);
|
|
}
|
|
|
|
WARN_ON(!xa_empty(&cm.local_id_table));
|
|
}
|
|
|
|
module_init(ib_cm_init);
|
|
module_exit(ib_cm_cleanup);
|