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|
- // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
- /*
- * Copyright (c) 2004-2007 Intel Corporation. All rights reserved.
- * Copyright (c) 2004 Topspin Corporation. All rights reserved.
- * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved.
- * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
- * Copyright (c) 2019, Mellanox Technologies inc. All rights reserved.
- */
- #include <linux/completion.h>
- #include <linux/dma-mapping.h>
- #include <linux/device.h>
- #include <linux/module.h>
- #include <linux/err.h>
- #include <linux/idr.h>
- #include <linux/interrupt.h>
- #include <linux/random.h>
- #include <linux/rbtree.h>
- #include <linux/spinlock.h>
- #include <linux/slab.h>
- #include <linux/sysfs.h>
- #include <linux/workqueue.h>
- #include <linux/kdev_t.h>
- #include <linux/etherdevice.h>
- #include <rdma/ib_cache.h>
- #include <rdma/ib_cm.h>
- #include "cm_msgs.h"
- #include "core_priv.h"
- #include "cm_trace.h"
- MODULE_AUTHOR("Sean Hefty");
- MODULE_DESCRIPTION("InfiniBand CM");
- MODULE_LICENSE("Dual BSD/GPL");
- static const char * const ibcm_rej_reason_strs[] = {
- [IB_CM_REJ_NO_QP] = "no QP",
- [IB_CM_REJ_NO_EEC] = "no EEC",
- [IB_CM_REJ_NO_RESOURCES] = "no resources",
- [IB_CM_REJ_TIMEOUT] = "timeout",
- [IB_CM_REJ_UNSUPPORTED] = "unsupported",
- [IB_CM_REJ_INVALID_COMM_ID] = "invalid comm ID",
- [IB_CM_REJ_INVALID_COMM_INSTANCE] = "invalid comm instance",
- [IB_CM_REJ_INVALID_SERVICE_ID] = "invalid service ID",
- [IB_CM_REJ_INVALID_TRANSPORT_TYPE] = "invalid transport type",
- [IB_CM_REJ_STALE_CONN] = "stale conn",
- [IB_CM_REJ_RDC_NOT_EXIST] = "RDC not exist",
- [IB_CM_REJ_INVALID_GID] = "invalid GID",
- [IB_CM_REJ_INVALID_LID] = "invalid LID",
- [IB_CM_REJ_INVALID_SL] = "invalid SL",
- [IB_CM_REJ_INVALID_TRAFFIC_CLASS] = "invalid traffic class",
- [IB_CM_REJ_INVALID_HOP_LIMIT] = "invalid hop limit",
- [IB_CM_REJ_INVALID_PACKET_RATE] = "invalid packet rate",
- [IB_CM_REJ_INVALID_ALT_GID] = "invalid alt GID",
- [IB_CM_REJ_INVALID_ALT_LID] = "invalid alt LID",
- [IB_CM_REJ_INVALID_ALT_SL] = "invalid alt SL",
- [IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS] = "invalid alt traffic class",
- [IB_CM_REJ_INVALID_ALT_HOP_LIMIT] = "invalid alt hop limit",
- [IB_CM_REJ_INVALID_ALT_PACKET_RATE] = "invalid alt packet rate",
- [IB_CM_REJ_PORT_CM_REDIRECT] = "port CM redirect",
- [IB_CM_REJ_PORT_REDIRECT] = "port redirect",
- [IB_CM_REJ_INVALID_MTU] = "invalid MTU",
- [IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES] = "insufficient resp resources",
- [IB_CM_REJ_CONSUMER_DEFINED] = "consumer defined",
- [IB_CM_REJ_INVALID_RNR_RETRY] = "invalid RNR retry",
- [IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID] = "duplicate local comm ID",
- [IB_CM_REJ_INVALID_CLASS_VERSION] = "invalid class version",
- [IB_CM_REJ_INVALID_FLOW_LABEL] = "invalid flow label",
- [IB_CM_REJ_INVALID_ALT_FLOW_LABEL] = "invalid alt flow label",
- [IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED] =
- "vendor option is not supported",
- };
- const char *__attribute_const__ ibcm_reject_msg(int reason)
- {
- size_t index = reason;
- if (index < ARRAY_SIZE(ibcm_rej_reason_strs) &&
- ibcm_rej_reason_strs[index])
- return ibcm_rej_reason_strs[index];
- else
- return "unrecognized reason";
- }
- EXPORT_SYMBOL(ibcm_reject_msg);
- struct cm_id_private;
- struct cm_work;
- static int cm_add_one(struct ib_device *device);
- static void cm_remove_one(struct ib_device *device, void *client_data);
- static void cm_process_work(struct cm_id_private *cm_id_priv,
- struct cm_work *work);
- static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv,
- struct ib_cm_sidr_rep_param *param);
- static int cm_send_dreq_locked(struct cm_id_private *cm_id_priv,
- const void *private_data, u8 private_data_len);
- static int cm_send_drep_locked(struct cm_id_private *cm_id_priv,
- void *private_data, u8 private_data_len);
- 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);
- static struct ib_client cm_client = {
- .name = "cm",
- .add = cm_add_one,
- .remove = cm_remove_one
- };
- static struct ib_cm {
- spinlock_t lock;
- struct list_head device_list;
- rwlock_t device_lock;
- struct rb_root listen_service_table;
- u64 listen_service_id;
- /* struct rb_root peer_service_table; todo: fix peer to peer */
- struct rb_root remote_qp_table;
- struct rb_root remote_id_table;
- struct rb_root remote_sidr_table;
- struct xarray local_id_table;
- u32 local_id_next;
- __be32 random_id_operand;
- struct list_head timewait_list;
- struct workqueue_struct *wq;
- /* Sync on cm change port state */
- spinlock_t state_lock;
- } cm;
- /* Counter indexes ordered by attribute ID */
- enum {
- CM_REQ_COUNTER,
- CM_MRA_COUNTER,
- CM_REJ_COUNTER,
- CM_REP_COUNTER,
- CM_RTU_COUNTER,
- CM_DREQ_COUNTER,
- CM_DREP_COUNTER,
- CM_SIDR_REQ_COUNTER,
- CM_SIDR_REP_COUNTER,
- CM_LAP_COUNTER,
- CM_APR_COUNTER,
- CM_ATTR_COUNT,
- CM_ATTR_ID_OFFSET = 0x0010,
- };
- enum {
- CM_XMIT,
- CM_XMIT_RETRIES,
- CM_RECV,
- CM_RECV_DUPLICATES,
- CM_COUNTER_GROUPS
- };
- static char const counter_group_names[CM_COUNTER_GROUPS]
- [sizeof("cm_rx_duplicates")] = {
- "cm_tx_msgs", "cm_tx_retries",
- "cm_rx_msgs", "cm_rx_duplicates"
- };
- struct cm_counter_group {
- struct kobject obj;
- atomic_long_t counter[CM_ATTR_COUNT];
- };
- struct cm_counter_attribute {
- struct attribute attr;
- int index;
- };
- #define CM_COUNTER_ATTR(_name, _index) \
- struct cm_counter_attribute cm_##_name##_counter_attr = { \
- .attr = { .name = __stringify(_name), .mode = 0444 }, \
- .index = _index \
- }
- static CM_COUNTER_ATTR(req, CM_REQ_COUNTER);
- static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER);
- static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER);
- static CM_COUNTER_ATTR(rep, CM_REP_COUNTER);
- static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER);
- static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER);
- static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER);
- static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER);
- static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER);
- static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER);
- static CM_COUNTER_ATTR(apr, CM_APR_COUNTER);
- static struct attribute *cm_counter_default_attrs[] = {
- &cm_req_counter_attr.attr,
- &cm_mra_counter_attr.attr,
- &cm_rej_counter_attr.attr,
- &cm_rep_counter_attr.attr,
- &cm_rtu_counter_attr.attr,
- &cm_dreq_counter_attr.attr,
- &cm_drep_counter_attr.attr,
- &cm_sidr_req_counter_attr.attr,
- &cm_sidr_rep_counter_attr.attr,
- &cm_lap_counter_attr.attr,
- &cm_apr_counter_attr.attr,
- NULL
- };
- struct cm_port {
- struct cm_device *cm_dev;
- struct ib_mad_agent *mad_agent;
- u8 port_num;
- struct list_head cm_priv_prim_list;
- struct list_head cm_priv_altr_list;
- struct cm_counter_group counter_group[CM_COUNTER_GROUPS];
- };
- struct cm_device {
- struct list_head list;
- struct ib_device *ib_device;
- u8 ack_delay;
- int going_down;
- struct cm_port *port[];
- };
- struct cm_av {
- struct cm_port *port;
- union ib_gid dgid;
- struct rdma_ah_attr ah_attr;
- u16 pkey_index;
- u8 timeout;
- };
- struct cm_work {
- struct delayed_work work;
- struct list_head list;
- struct cm_port *port;
- struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */
- __be32 local_id; /* Established / timewait */
- __be32 remote_id;
- struct ib_cm_event cm_event;
- struct sa_path_rec path[];
- };
- struct cm_timewait_info {
- struct cm_work work;
- struct list_head list;
- struct rb_node remote_qp_node;
- struct rb_node remote_id_node;
- __be64 remote_ca_guid;
- __be32 remote_qpn;
- u8 inserted_remote_qp;
- u8 inserted_remote_id;
- };
- struct cm_id_private {
- struct ib_cm_id id;
- struct rb_node service_node;
- struct rb_node sidr_id_node;
- spinlock_t lock; /* Do not acquire inside cm.lock */
- struct completion comp;
- refcount_t refcount;
- /* Number of clients sharing this ib_cm_id. Only valid for listeners.
- * Protected by the cm.lock spinlock. */
- int listen_sharecount;
- struct rcu_head rcu;
- struct ib_mad_send_buf *msg;
- struct cm_timewait_info *timewait_info;
- /* todo: use alternate port on send failure */
- struct cm_av av;
- struct cm_av alt_av;
- void *private_data;
- __be64 tid;
- __be32 local_qpn;
- __be32 remote_qpn;
- enum ib_qp_type qp_type;
- __be32 sq_psn;
- __be32 rq_psn;
- int timeout_ms;
- enum ib_mtu path_mtu;
- __be16 pkey;
- u8 private_data_len;
- u8 max_cm_retries;
- u8 responder_resources;
- u8 initiator_depth;
- u8 retry_count;
- u8 rnr_retry_count;
- u8 service_timeout;
- u8 target_ack_delay;
- struct list_head prim_list;
- struct list_head altr_list;
- /* Indicates that the send port mad is registered and av is set */
- int prim_send_port_not_ready;
- int altr_send_port_not_ready;
- struct list_head work_list;
- atomic_t work_count;
- struct rdma_ucm_ece ece;
- };
- static void cm_work_handler(struct work_struct *work);
- static inline void cm_deref_id(struct cm_id_private *cm_id_priv)
- {
- if (refcount_dec_and_test(&cm_id_priv->refcount))
- complete(&cm_id_priv->comp);
- }
- static int cm_alloc_msg(struct cm_id_private *cm_id_priv,
- struct ib_mad_send_buf **msg)
- {
- struct ib_mad_agent *mad_agent;
- struct ib_mad_send_buf *m;
- struct ib_ah *ah;
- struct cm_av *av;
- unsigned long flags, flags2;
- int ret = 0;
- /* don't let the port to be released till the agent is down */
- spin_lock_irqsave(&cm.state_lock, flags2);
- spin_lock_irqsave(&cm.lock, flags);
- if (!cm_id_priv->prim_send_port_not_ready)
- av = &cm_id_priv->av;
- else if (!cm_id_priv->altr_send_port_not_ready &&
- (cm_id_priv->alt_av.port))
- av = &cm_id_priv->alt_av;
- else {
- pr_info("%s: not valid CM id\n", __func__);
- ret = -ENODEV;
- spin_unlock_irqrestore(&cm.lock, flags);
- goto out;
- }
- spin_unlock_irqrestore(&cm.lock, flags);
- /* Make sure the port haven't released the mad yet */
- mad_agent = cm_id_priv->av.port->mad_agent;
- if (!mad_agent) {
- pr_info("%s: not a valid MAD agent\n", __func__);
- ret = -ENODEV;
- goto out;
- }
- ah = rdma_create_ah(mad_agent->qp->pd, &av->ah_attr, 0);
- if (IS_ERR(ah)) {
- ret = PTR_ERR(ah);
- goto out;
- }
- m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn,
- av->pkey_index,
- 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
- GFP_ATOMIC,
- IB_MGMT_BASE_VERSION);
- if (IS_ERR(m)) {
- rdma_destroy_ah(ah, 0);
- ret = PTR_ERR(m);
- goto out;
- }
- /* Timeout set by caller if response is expected. */
- m->ah = ah;
- m->retries = cm_id_priv->max_cm_retries;
- refcount_inc(&cm_id_priv->refcount);
- m->context[0] = cm_id_priv;
- *msg = m;
- out:
- spin_unlock_irqrestore(&cm.state_lock, flags2);
- return ret;
- }
- static struct ib_mad_send_buf *cm_alloc_response_msg_no_ah(struct cm_port *port,
- struct ib_mad_recv_wc *mad_recv_wc)
- {
- return ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index,
- 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
- GFP_ATOMIC,
- IB_MGMT_BASE_VERSION);
- }
- static int cm_create_response_msg_ah(struct cm_port *port,
- struct ib_mad_recv_wc *mad_recv_wc,
- struct ib_mad_send_buf *msg)
- {
- struct ib_ah *ah;
- ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc,
- mad_recv_wc->recv_buf.grh, port->port_num);
- if (IS_ERR(ah))
- return PTR_ERR(ah);
- msg->ah = ah;
- return 0;
- }
- static void cm_free_msg(struct ib_mad_send_buf *msg)
- {
- if (msg->ah)
- rdma_destroy_ah(msg->ah, 0);
- if (msg->context[0])
- cm_deref_id(msg->context[0]);
- ib_free_send_mad(msg);
- }
- static int cm_alloc_response_msg(struct cm_port *port,
- struct ib_mad_recv_wc *mad_recv_wc,
- struct ib_mad_send_buf **msg)
- {
- struct ib_mad_send_buf *m;
- int ret;
- m = cm_alloc_response_msg_no_ah(port, mad_recv_wc);
- if (IS_ERR(m))
- return PTR_ERR(m);
- ret = cm_create_response_msg_ah(port, mad_recv_wc, m);
- if (ret) {
- cm_free_msg(m);
- return ret;
- }
- *msg = m;
- return 0;
- }
- static void * cm_copy_private_data(const void *private_data,
- u8 private_data_len)
- {
- void *data;
- if (!private_data || !private_data_len)
- return NULL;
- data = kmemdup(private_data, private_data_len, GFP_KERNEL);
- if (!data)
- return ERR_PTR(-ENOMEM);
- return data;
- }
- static void cm_set_private_data(struct cm_id_private *cm_id_priv,
- void *private_data, u8 private_data_len)
- {
- if (cm_id_priv->private_data && cm_id_priv->private_data_len)
- kfree(cm_id_priv->private_data);
- cm_id_priv->private_data = private_data;
- cm_id_priv->private_data_len = private_data_len;
- }
- static int cm_init_av_for_lap(struct cm_port *port, struct ib_wc *wc,
- struct ib_grh *grh, struct cm_av *av)
- {
- struct rdma_ah_attr new_ah_attr;
- int ret;
- av->port = port;
- av->pkey_index = wc->pkey_index;
- /*
- * av->ah_attr might be initialized based on past wc during incoming
- * connect request or while sending out connect request. 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 old one.
- */
- ret = ib_init_ah_attr_from_wc(port->cm_dev->ib_device,
- port->port_num, wc,
- grh, &new_ah_attr);
- if (ret)
- return ret;
- rdma_move_ah_attr(&av->ah_attr, &new_ah_attr);
- return 0;
- }
- static int cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc,
- struct ib_grh *grh, struct cm_av *av)
- {
- av->port = port;
- av->pkey_index = wc->pkey_index;
- return ib_init_ah_attr_from_wc(port->cm_dev->ib_device,
- port->port_num, wc,
- grh, &av->ah_attr);
- }
- static void add_cm_id_to_port_list(struct cm_id_private *cm_id_priv,
- struct cm_av *av, struct cm_port *port)
- {
- unsigned long flags;
- spin_lock_irqsave(&cm.lock, flags);
- if (&cm_id_priv->av == av)
- list_add_tail(&cm_id_priv->prim_list, &port->cm_priv_prim_list);
- else if (&cm_id_priv->alt_av == av)
- list_add_tail(&cm_id_priv->altr_list, &port->cm_priv_altr_list);
- else
- WARN_ON(true);
- spin_unlock_irqrestore(&cm.lock, flags);
- }
- static struct cm_port *
- get_cm_port_from_path(struct sa_path_rec *path, const struct ib_gid_attr *attr)
- {
- struct cm_device *cm_dev;
- struct cm_port *port = NULL;
- unsigned long flags;
- if (attr) {
- read_lock_irqsave(&cm.device_lock, flags);
- list_for_each_entry(cm_dev, &cm.device_list, list) {
- if (cm_dev->ib_device == attr->device) {
- port = cm_dev->port[attr->port_num - 1];
- break;
- }
- }
- read_unlock_irqrestore(&cm.device_lock, flags);
- } else {
- /* 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 cm_id_private *cm_id_priv)
- {
- 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;
- av->port = 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;
- add_cm_id_to_port_list(cm_id_priv, av, port);
- rdma_move_ah_attr(&av->ah_attr, &new_ah_attr);
- return 0;
- }
- 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;
- union ib_gid *port_gid = &cm_id_priv->av.dgid;
- __be32 remote_id = cm_id_priv->id.remote_id;
- while (*link) {
- parent = *link;
- cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
- sidr_id_node);
- if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id))
- link = &(*link)->rb_left;
- else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id))
- link = &(*link)->rb_right;
- else {
- int cmp;
- cmp = memcmp(port_gid, &cur_cm_id_priv->av.dgid,
- sizeof *port_gid);
- if (cmp < 0)
- link = &(*link)->rb_left;
- else if (cmp > 0)
- link = &(*link)->rb_right;
- else
- return cur_cm_id_priv;
- }
- }
- rb_link_node(&cm_id_priv->sidr_id_node, parent, link);
- rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
- return NULL;
- }
- static 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);
- INIT_LIST_HEAD(&cm_id_priv->prim_list);
- INIT_LIST_HEAD(&cm_id_priv->altr_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->av.port->mad_agent, 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->av.port->mad_agent, 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->av.port->mad_agent, 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->av.port->mad_agent, 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;
- }
- if (!list_empty(&cm_id_priv->altr_list) &&
- (!cm_id_priv->altr_send_port_not_ready))
- list_del(&cm_id_priv->altr_list);
- if (!list_empty(&cm_id_priv->prim_list) &&
- (!cm_id_priv->prim_send_port_not_ready))
- list_del(&cm_id_priv->prim_list);
- 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);
- rdma_destroy_ah_attr(&cm_id_priv->av.ah_attr);
- rdma_destroy_ah_attr(&cm_id_priv->alt_av.ah_attr);
- 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);
- /**
- * 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, low_tid;
- hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32;
- low_tid = (u64)cm_id_priv->id.local_id;
- 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_id_private *cm_id_priv;
- struct cm_req_msg *req_msg;
- unsigned long flags;
- int ret;
- ret = cm_validate_req_param(param);
- if (ret)
- return ret;
- /* Verify that we're not in timewait. */
- cm_id_priv = container_of(cm_id, struct cm_id_private, id);
- spin_lock_irqsave(&cm_id_priv->lock, flags);
- if (cm_id->state != IB_CM_IDLE || WARN_ON(cm_id_priv->timewait_info)) {
- spin_unlock_irqrestore(&cm_id_priv->lock, flags);
- ret = -EINVAL;
- goto out;
- }
- spin_unlock_irqrestore(&cm_id_priv->lock, flags);
- cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv->
- id.local_id);
- if (IS_ERR(cm_id_priv->timewait_info)) {
- ret = PTR_ERR(cm_id_priv->timewait_info);
- cm_id_priv->timewait_info = NULL;
- goto out;
- }
- ret = cm_init_av_by_path(param->primary_path,
- param->ppath_sgid_attr, &cm_id_priv->av,
- cm_id_priv);
- if (ret)
- goto out;
- if (param->alternate_path) {
- ret = cm_init_av_by_path(param->alternate_path, NULL,
- &cm_id_priv->alt_av, cm_id_priv);
- if (ret)
- goto out;
- }
- cm_id->service_id = param->service_id;
- cm_id->service_mask = ~cpu_to_be64(0);
- cm_id_priv->timeout_ms = cm_convert_to_ms(
- param->primary_path->packet_life_time) * 2 +
- cm_convert_to_ms(
- param->remote_cm_response_timeout);
- cm_id_priv->max_cm_retries = param->max_cm_retries;
- cm_id_priv->initiator_depth = param->initiator_depth;
- cm_id_priv->responder_resources = param->responder_resources;
- cm_id_priv->retry_count = param->retry_count;
- cm_id_priv->path_mtu = param->primary_path->mtu;
- cm_id_priv->pkey = param->primary_path->pkey;
- cm_id_priv->qp_type = param->qp_type;
- ret = cm_alloc_msg(cm_id_priv, &cm_id_priv->msg);
- if (ret)
- goto out;
- req_msg = (struct cm_req_msg *) cm_id_priv->msg->mad;
- cm_format_req(req_msg, cm_id_priv, param);
- cm_id_priv->tid = req_msg->hdr.tid;
- cm_id_priv->msg->timeout_ms = cm_id_priv->timeout_ms;
- cm_id_priv->msg->context[1] = (void *) (unsigned long) IB_CM_REQ_SENT;
- cm_id_priv->local_qpn = 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);
- spin_lock_irqsave(&cm_id_priv->lock, flags);
- ret = ib_post_send_mad(cm_id_priv->msg, NULL);
- if (ret) {
- spin_unlock_irqrestore(&cm_id_priv->lock, flags);
- goto error2;
- }
- BUG_ON(cm_id->state != IB_CM_IDLE);
- cm_id->state = IB_CM_REQ_SENT;
- spin_unlock_irqrestore(&cm_id_priv->lock, flags);
- return 0;
- error2: cm_free_msg(cm_id_priv->msg);
- out: return ret;
- }
- EXPORT_SYMBOL(ib_send_cm_req);
- static int cm_issue_rej(struct cm_port *port,
- struct ib_mad_recv_wc *mad_recv_wc,
- enum ib_cm_rej_reason reason,
- enum cm_msg_response msg_rejected,
- void *ari, u8 ari_length)
- {
- struct ib_mad_send_buf *msg = NULL;
- struct cm_rej_msg *rej_msg, *rcv_msg;
- int ret;
- ret = cm_alloc_response_msg(port, mad_recv_wc, &msg);
- if (ret)
- return ret;
- /* We just need common CM header information. Cast to any message. */
- rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad;
- rej_msg = (struct cm_rej_msg *) msg->mad;
- cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid);
- 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_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, u8 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;
- u8 port_num = work->port->port_num;
- u16 pkey_index = work->mad_recv_wc->wc->pkey_index;
- u16 pkey;
- int ret;
- ret = ib_get_cached_pkey(ib_dev, port_num, pkey_index, &pkey);
- if (ret) {
- dev_warn_ratelimited(&ib_dev->dev, "ib_cm: Couldn't retrieve pkey for incoming request (port %d, pkey index %d). %d\n",
- port_num, pkey_index, ret);
- return 0;
- }
- return pkey;
- }
- /**
- * 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;
- u8 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->counter_group[CM_RECV_DUPLICATES].
- counter[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_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;
- }
- if (cm_id_priv->av.ah_attr.type != RDMA_AH_ATTR_TYPE_ROCE)
- cm_process_routed_req(req_msg, work->mad_recv_wc->wc);
- 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 (gid_attr &&
- rdma_protocol_roce(work->port->cm_dev->ib_device,
- work->port->port_num)) {
- work->path[0].rec_type =
- sa_conv_gid_to_pathrec_type(gid_attr->gid_type);
- } else {
- 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;
- ret = cm_init_av_by_path(&work->path[0], gid_attr, &cm_id_priv->av,
- cm_id_priv);
- 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, cm_id_priv);
- 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;
- }
- ret = cm_alloc_msg(cm_id_priv, &msg);
- if (ret)
- goto out;
- rep_msg = (struct cm_rep_msg *) msg->mad;
- cm_format_rep(rep_msg, cm_id_priv, param);
- msg->timeout_ms = cm_id_priv->timeout_ms;
- msg->context[1] = (void *) (unsigned long) IB_CM_REP_SENT;
- trace_icm_send_rep(cm_id);
- ret = ib_post_send_mad(msg, NULL);
- if (ret) {
- spin_unlock_irqrestore(&cm_id_priv->lock, flags);
- cm_free_msg(msg);
- return ret;
- }
- cm_id->state = IB_CM_REP_SENT;
- cm_id_priv->msg = msg;
- cm_id_priv->initiator_depth = param->initiator_depth;
- cm_id_priv->responder_resources = param->responder_resources;
- cm_id_priv->rq_psn = 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);
- 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;
- }
- ret = cm_alloc_msg(cm_id_priv, &msg);
- if (ret)
- goto error;
- cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
- private_data, private_data_len);
- 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->counter_group[CM_RECV_DUPLICATES].
- counter[CM_REP_COUNTER]);
- ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg);
- if (ret)
- goto deref;
- spin_lock_irq(&cm_id_priv->lock);
- if (cm_id_priv->id.state == IB_CM_ESTABLISHED)
- cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv,
- cm_id_priv->private_data,
- cm_id_priv->private_data_len);
- else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT)
- cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
- CM_MSG_RESPONSE_REP, cm_id_priv->service_timeout,
- cm_id_priv->private_data,
- cm_id_priv->private_data_len);
- else
- goto unlock;
- spin_unlock_irq(&cm_id_priv->lock);
- 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_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->av.port->mad_agent, 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->av.port->mad_agent, 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->counter_group[CM_RECV_DUPLICATES].
- counter[CM_RTU_COUNTER]);
- goto out;
- }
- cm_id_priv->id.state = IB_CM_ESTABLISHED;
- ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
- 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->av.port->mad_agent, cm_id_priv->msg);
- ret = cm_alloc_msg(cm_id_priv, &msg);
- if (ret) {
- cm_enter_timewait(cm_id_priv);
- return ret;
- }
- 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_msg(msg);
- return ret;
- }
- cm_id_priv->id.state = IB_CM_DREQ_SENT;
- cm_id_priv->msg = msg;
- 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);
- ret = cm_alloc_msg(cm_id_priv, &msg);
- if (ret)
- return ret;
- 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_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->counter_group[CM_RECV_DUPLICATES].
- counter[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->av.port->mad_agent, cm_id_priv->msg);
- break;
- case IB_CM_ESTABLISHED:
- if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT ||
- cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
- ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
- break;
- case IB_CM_MRA_REP_RCVD:
- break;
- case IB_CM_TIMEWAIT:
- atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
- counter[CM_DREQ_COUNTER]);
- 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_msg(msg);
- goto deref;
- case IB_CM_DREQ_RCVD:
- atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
- counter[CM_DREQ_COUNTER]);
- goto unlock;
- default:
- 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->av.port->mad_agent, 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);
- ret = cm_alloc_msg(cm_id_priv, &msg);
- if (ret)
- return ret;
- 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);
- ret = cm_alloc_msg(cm_id_priv, &msg);
- if (ret)
- return ret;
- 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->av.port->mad_agent, 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->av.port->mad_agent, 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->av.port->mad_agent,
- 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 error1;
- }
- if (!(service_timeout & IB_CM_MRA_FLAG_DELAY)) {
- ret = cm_alloc_msg(cm_id_priv, &msg);
- if (ret)
- goto error1;
- cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
- msg_response, service_timeout,
- private_data, private_data_len);
- trace_icm_send_mra(cm_id);
- ret = ib_post_send_mad(msg, NULL);
- if (ret)
- goto error2;
- }
- cm_id->state = cm_state;
- cm_id->lap_state = lap_state;
- cm_id_priv->service_timeout = service_timeout;
- cm_set_private_data(cm_id_priv, data, private_data_len);
- spin_unlock_irqrestore(&cm_id_priv->lock, flags);
- return 0;
- error1: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
- kfree(data);
- return ret;
- error2: spin_unlock_irqrestore(&cm_id_priv->lock, flags);
- kfree(data);
- cm_free_msg(msg);
- return ret;
- }
- EXPORT_SYMBOL(ib_send_cm_mra);
- static struct cm_id_private * cm_acquire_mraed_id(struct cm_mra_msg *mra_msg)
- {
- switch (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->av.port->mad_agent,
- cm_id_priv->msg, timeout))
- goto out;
- cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD;
- break;
- case IB_CM_REP_SENT:
- if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) !=
- CM_MSG_RESPONSE_REP ||
- ib_modify_mad(cm_id_priv->av.port->mad_agent,
- cm_id_priv->msg, timeout))
- goto out;
- cm_id_priv->id.state = IB_CM_MRA_REP_RCVD;
- break;
- case IB_CM_ESTABLISHED:
- if (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->av.port->mad_agent,
- cm_id_priv->msg, timeout)) {
- if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD)
- atomic_long_inc(&work->port->
- counter_group[CM_RECV_DUPLICATES].
- counter[CM_MRA_COUNTER]);
- goto out;
- }
- cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD;
- break;
- case IB_CM_MRA_REQ_RCVD:
- case IB_CM_MRA_REP_RCVD:
- atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
- counter[CM_MRA_COUNTER]);
- 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;
- 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);
- spin_lock_irq(&cm_id_priv->lock);
- if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
- goto unlock;
- switch (cm_id_priv->id.lap_state) {
- case IB_CM_LAP_UNINIT:
- case IB_CM_LAP_IDLE:
- break;
- case IB_CM_MRA_LAP_SENT:
- atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
- counter[CM_LAP_COUNTER]);
- 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_msg(msg);
- goto deref;
- case IB_CM_LAP_RCVD:
- atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
- counter[CM_LAP_COUNTER]);
- goto unlock;
- default:
- goto unlock;
- }
- ret = cm_init_av_for_lap(work->port, work->mad_recv_wc->wc,
- work->mad_recv_wc->recv_buf.grh,
- &cm_id_priv->av);
- if (ret)
- goto unlock;
- ret = cm_init_av_by_path(param->alternate_path, NULL,
- &cm_id_priv->alt_av, cm_id_priv);
- if (ret)
- 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->av.port->mad_agent, cm_id_priv->msg);
- cm_id_priv->msg = NULL;
- 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;
- 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,
- &cm_id_priv->av,
- cm_id_priv);
- if (ret)
- goto out;
- cm_id->service_id = param->service_id;
- cm_id->service_mask = ~cpu_to_be64(0);
- cm_id_priv->timeout_ms = param->timeout_ms;
- cm_id_priv->max_cm_retries = param->max_cm_retries;
- ret = cm_alloc_msg(cm_id_priv, &msg);
- if (ret)
- goto out;
- cm_format_sidr_req((struct cm_sidr_req_msg *) msg->mad, cm_id_priv,
- param);
- msg->timeout_ms = cm_id_priv->timeout_ms;
- msg->context[1] = (void *) (unsigned long) IB_CM_SIDR_REQ_SENT;
- spin_lock_irqsave(&cm_id_priv->lock, flags);
- if (cm_id->state == IB_CM_IDLE) {
- trace_icm_send_sidr_req(&cm_id_priv->id);
- ret = ib_post_send_mad(msg, NULL);
- } else {
- ret = -EINVAL;
- }
- if (ret) {
- spin_unlock_irqrestore(&cm_id_priv->lock, flags);
- cm_free_msg(msg);
- goto out;
- }
- cm_id->state = IB_CM_SIDR_REQ_SENT;
- cm_id_priv->msg = msg;
- spin_unlock_irqrestore(&cm_id_priv->lock, flags);
- out:
- return ret;
- }
- EXPORT_SYMBOL(ib_send_cm_sidr_req);
- static void cm_format_sidr_req_event(struct cm_work *work,
- 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->av.dgid.global.subnet_prefix = cpu_to_be64(wc->slid);
- cm_id_priv->av.dgid.global.interface_id = 0;
- 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->counter_group[CM_RECV_DUPLICATES].
- counter[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;
- ret = cm_alloc_msg(cm_id_priv, &msg);
- if (ret)
- return ret;
- 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->av.port->mad_agent, 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 ib_mad_send_buf *msg,
- enum ib_wc_status wc_status)
- {
- struct cm_id_private *cm_id_priv;
- struct ib_cm_event cm_event;
- enum ib_cm_state state;
- int ret;
- memset(&cm_event, 0, sizeof cm_event);
- cm_id_priv = msg->context[0];
- /* Discard old sends or ones without a response. */
- spin_lock_irq(&cm_id_priv->lock);
- state = (enum ib_cm_state) (unsigned long) msg->context[1];
- if (msg != cm_id_priv->msg || state != cm_id_priv->id.state)
- goto discard;
- 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 discard;
- }
- spin_unlock_irq(&cm_id_priv->lock);
- cm_event.param.send_status = wc_status;
- /* No other events can occur on the cm_id at this point. */
- ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event);
- cm_free_msg(msg);
- if (ret)
- ib_destroy_cm_id(&cm_id_priv->id);
- return;
- discard:
- spin_unlock_irq(&cm_id_priv->lock);
- cm_free_msg(msg);
- }
- static void cm_send_handler(struct ib_mad_agent *mad_agent,
- struct ib_mad_send_wc *mad_send_wc)
- {
- struct ib_mad_send_buf *msg = mad_send_wc->send_buf;
- struct cm_port *port;
- u16 attr_index;
- port = mad_agent->context;
- attr_index = be16_to_cpu(((struct ib_mad_hdr *)
- msg->mad)->attr_id) - CM_ATTR_ID_OFFSET;
- /*
- * If the send was in response to a received message (context[0] is not
- * set to a cm_id), and is not a REJ, then it is a send that was
- * manually retried.
- */
- if (!msg->context[0] && (attr_index != CM_REJ_COUNTER))
- msg->retries = 1;
- atomic_long_add(1 + msg->retries,
- &port->counter_group[CM_XMIT].counter[attr_index]);
- if (msg->retries)
- atomic_long_add(msg->retries,
- &port->counter_group[CM_XMIT_RETRIES].
- counter[attr_index]);
- switch (mad_send_wc->status) {
- case IB_WC_SUCCESS:
- case IB_WC_WR_FLUSH_ERR:
- cm_free_msg(msg);
- break;
- default:
- if (msg->context[0] && msg->context[1])
- cm_process_send_error(msg, mad_send_wc->status);
- else
- cm_free_msg(msg);
- break;
- }
- }
- static void cm_work_handler(struct work_struct *_work)
- {
- struct cm_work *work = container_of(_work, struct cm_work, work.work);
- int ret;
- switch (work->cm_event.event) {
- case IB_CM_REQ_RECEIVED:
- ret = cm_req_handler(work);
- break;
- case IB_CM_MRA_RECEIVED:
- ret = cm_mra_handler(work);
- break;
- case IB_CM_REJ_RECEIVED:
- ret = cm_rej_handler(work);
- break;
- case IB_CM_REP_RECEIVED:
- ret = cm_rep_handler(work);
- break;
- case IB_CM_RTU_RECEIVED:
- ret = cm_rtu_handler(work);
- break;
- case IB_CM_USER_ESTABLISHED:
- ret = cm_establish_handler(work);
- break;
- case IB_CM_DREQ_RECEIVED:
- ret = cm_dreq_handler(work);
- break;
- case IB_CM_DREP_RECEIVED:
- ret = cm_drep_handler(work);
- break;
- case IB_CM_SIDR_REQ_RECEIVED:
- ret = cm_sidr_req_handler(work);
- break;
- case IB_CM_SIDR_REP_RECEIVED:
- ret = cm_sidr_rep_handler(work);
- break;
- case IB_CM_LAP_RECEIVED:
- ret = cm_lap_handler(work);
- break;
- case IB_CM_APR_RECEIVED:
- ret = cm_apr_handler(work);
- break;
- case IB_CM_TIMEWAIT_EXIT:
- ret = cm_timewait_handler(work);
- break;
- default:
- 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;
- struct cm_av tmp_av;
- unsigned long flags;
- int tmp_send_port_not_ready;
- 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;
- /* Swap address vector */
- tmp_av = cm_id_priv->av;
- cm_id_priv->av = cm_id_priv->alt_av;
- cm_id_priv->alt_av = tmp_av;
- /* Swap port send ready state */
- tmp_send_port_not_ready = cm_id_priv->prim_send_port_not_ready;
- cm_id_priv->prim_send_port_not_ready = cm_id_priv->altr_send_port_not_ready;
- cm_id_priv->altr_send_port_not_ready = tmp_send_port_not_ready;
- } 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->counter_group[CM_RECV].
- counter[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;
- 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)) {
- *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;
- 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 kobject *obj, struct attribute *attr,
- char *buf)
- {
- struct cm_counter_group *group;
- struct cm_counter_attribute *cm_attr;
- group = container_of(obj, struct cm_counter_group, obj);
- cm_attr = container_of(attr, struct cm_counter_attribute, attr);
- return sprintf(buf, "%ld\n",
- atomic_long_read(&group->counter[cm_attr->index]));
- }
- static const struct sysfs_ops cm_counter_ops = {
- .show = cm_show_counter
- };
- static struct kobj_type cm_counter_obj_type = {
- .sysfs_ops = &cm_counter_ops,
- .default_attrs = cm_counter_default_attrs
- };
- static int cm_create_port_fs(struct cm_port *port)
- {
- int i, ret;
- for (i = 0; i < CM_COUNTER_GROUPS; i++) {
- ret = ib_port_register_module_stat(port->cm_dev->ib_device,
- port->port_num,
- &port->counter_group[i].obj,
- &cm_counter_obj_type,
- counter_group_names[i]);
- if (ret)
- goto error;
- }
- return 0;
- error:
- while (i--)
- ib_port_unregister_module_stat(&port->counter_group[i].obj);
- return ret;
- }
- static void cm_remove_port_fs(struct cm_port *port)
- {
- int i;
- for (i = 0; i < CM_COUNTER_GROUPS; i++)
- ib_port_unregister_module_stat(&port->counter_group[i].obj);
- }
- 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;
- unsigned int i;
- cm_dev = kzalloc(struct_size(cm_dev, port, ib_device->phys_port_cnt),
- GFP_KERNEL);
- if (!cm_dev)
- return -ENOMEM;
- cm_dev->ib_device = ib_device;
- cm_dev->ack_delay = ib_device->attrs.local_ca_ack_delay;
- cm_dev->going_down = 0;
- 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;
- INIT_LIST_HEAD(&port->cm_priv_prim_list);
- INIT_LIST_HEAD(&port->cm_priv_altr_list);
- ret = cm_create_port_fs(port);
- if (ret)
- goto error1;
- port->mad_agent = ib_register_mad_agent(ib_device, i,
- IB_QPT_GSI,
- ®_req,
- 0,
- cm_send_handler,
- cm_recv_handler,
- port,
- 0);
- if (IS_ERR(port->mad_agent)) {
- 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;
- }
- ib_set_client_data(ib_device, &cm_client, cm_dev);
- write_lock_irqsave(&cm.device_lock, flags);
- list_add_tail(&cm_dev->list, &cm.device_list);
- write_unlock_irqrestore(&cm.device_lock, flags);
- return 0;
- error3:
- ib_unregister_mad_agent(port->mad_agent);
- error2:
- cm_remove_port_fs(port);
- error1:
- port_modify.set_port_cap_mask = 0;
- port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
- kfree(port);
- while (--i) {
- if (!rdma_cap_ib_cm(ib_device, i))
- continue;
- port = cm_dev->port[i-1];
- ib_modify_port(ib_device, port->port_num, 0, &port_modify);
- ib_unregister_mad_agent(port->mad_agent);
- cm_remove_port_fs(port);
- kfree(port);
- }
- free:
- kfree(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 cm_id_private *cm_id_priv;
- struct ib_mad_agent *cur_mad_agent;
- struct ib_port_modify port_modify = {
- .clr_port_cap_mask = IB_PORT_CM_SUP
- };
- unsigned long flags;
- unsigned int 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) {
- 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);
- /* Mark all the cm_id's as not valid */
- spin_lock_irq(&cm.lock);
- list_for_each_entry(cm_id_priv, &port->cm_priv_altr_list, altr_list)
- cm_id_priv->altr_send_port_not_ready = 1;
- list_for_each_entry(cm_id_priv, &port->cm_priv_prim_list, prim_list)
- cm_id_priv->prim_send_port_not_ready = 1;
- spin_unlock_irq(&cm.lock);
- /*
- * 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);
- spin_lock_irq(&cm.state_lock);
- cur_mad_agent = port->mad_agent;
- port->mad_agent = NULL;
- spin_unlock_irq(&cm.state_lock);
- ib_unregister_mad_agent(cur_mad_agent);
- cm_remove_port_fs(port);
- kfree(port);
- }
- kfree(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);
- spin_lock_init(&cm.state_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);
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