forked from Minki/linux
[IB] CM: bind IDs to a specific device
Bind communication identifiers to a device to support device removal. Export per HCA CM devices to userspace. Signed-off-by: Sean Hefty <sean.hefty@intel.com>
This commit is contained in:
Sean Hefty
Roland Dreier
parent
595e726a1f
commit
07d357d0cb
@ -366,9 +366,15 @@ static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
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cur_cm_id_priv = rb_entry(parent, struct cm_id_private,
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service_node);
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if ((cur_cm_id_priv->id.service_mask & service_id) ==
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(service_mask & cur_cm_id_priv->id.service_id))
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return cm_id_priv;
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if (service_id < cur_cm_id_priv->id.service_id)
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(service_mask & cur_cm_id_priv->id.service_id) &&
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(cm_id_priv->id.device == cur_cm_id_priv->id.device))
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return cur_cm_id_priv;
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if (cm_id_priv->id.device < cur_cm_id_priv->id.device)
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link = &(*link)->rb_left;
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else if (cm_id_priv->id.device > cur_cm_id_priv->id.device)
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link = &(*link)->rb_right;
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else if (service_id < cur_cm_id_priv->id.service_id)
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link = &(*link)->rb_left;
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else
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link = &(*link)->rb_right;
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@ -378,7 +384,8 @@ static struct cm_id_private * cm_insert_listen(struct cm_id_private *cm_id_priv)
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return NULL;
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}
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static struct cm_id_private * cm_find_listen(__be64 service_id)
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static struct cm_id_private * cm_find_listen(struct ib_device *device,
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__be64 service_id)
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{
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struct rb_node *node = cm.listen_service_table.rb_node;
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struct cm_id_private *cm_id_priv;
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@ -386,9 +393,15 @@ static struct cm_id_private * cm_find_listen(__be64 service_id)
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while (node) {
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cm_id_priv = rb_entry(node, struct cm_id_private, service_node);
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if ((cm_id_priv->id.service_mask & service_id) ==
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(cm_id_priv->id.service_mask & cm_id_priv->id.service_id))
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cm_id_priv->id.service_id &&
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(cm_id_priv->id.device == device))
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return cm_id_priv;
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if (service_id < cm_id_priv->id.service_id)
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if (device < cm_id_priv->id.device)
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node = node->rb_left;
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else if (device > cm_id_priv->id.device)
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node = node->rb_right;
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else if (service_id < cm_id_priv->id.service_id)
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node = node->rb_left;
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else
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node = node->rb_right;
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@ -523,7 +536,8 @@ static void cm_reject_sidr_req(struct cm_id_private *cm_id_priv,
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ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m);
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}
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struct ib_cm_id *ib_create_cm_id(ib_cm_handler cm_handler,
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struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
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ib_cm_handler cm_handler,
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void *context)
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{
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struct cm_id_private *cm_id_priv;
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@ -535,6 +549,7 @@ struct ib_cm_id *ib_create_cm_id(ib_cm_handler cm_handler,
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memset(cm_id_priv, 0, sizeof *cm_id_priv);
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cm_id_priv->id.state = IB_CM_IDLE;
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cm_id_priv->id.device = device;
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cm_id_priv->id.cm_handler = cm_handler;
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cm_id_priv->id.context = context;
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cm_id_priv->id.remote_cm_qpn = 1;
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@ -1047,7 +1062,6 @@ static void cm_format_req_event(struct cm_work *work,
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req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
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param = &work->cm_event.param.req_rcvd;
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param->listen_id = listen_id;
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param->device = cm_id_priv->av.port->mad_agent->device;
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param->port = cm_id_priv->av.port->port_num;
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param->primary_path = &work->path[0];
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if (req_msg->alt_local_lid)
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@ -1226,7 +1240,8 @@ static struct cm_id_private * cm_match_req(struct cm_work *work,
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}
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/* Find matching listen request. */
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listen_cm_id_priv = cm_find_listen(req_msg->service_id);
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listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device,
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req_msg->service_id);
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if (!listen_cm_id_priv) {
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spin_unlock_irqrestore(&cm.lock, flags);
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cm_issue_rej(work->port, work->mad_recv_wc,
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@ -1254,7 +1269,7 @@ static int cm_req_handler(struct cm_work *work)
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req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad;
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cm_id = ib_create_cm_id(NULL, NULL);
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cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
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if (IS_ERR(cm_id))
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return PTR_ERR(cm_id);
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@ -2629,7 +2644,6 @@ static void cm_format_sidr_req_event(struct cm_work *work,
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param = &work->cm_event.param.sidr_req_rcvd;
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param->pkey = __be16_to_cpu(sidr_req_msg->pkey);
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param->listen_id = listen_id;
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param->device = work->port->mad_agent->device;
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param->port = work->port->port_num;
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work->cm_event.private_data = &sidr_req_msg->private_data;
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}
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@ -2642,7 +2656,7 @@ static int cm_sidr_req_handler(struct cm_work *work)
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struct ib_wc *wc;
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unsigned long flags;
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cm_id = ib_create_cm_id(NULL, NULL);
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cm_id = ib_create_cm_id(work->port->cm_dev->device, NULL, NULL);
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if (IS_ERR(cm_id))
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return PTR_ERR(cm_id);
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cm_id_priv = container_of(cm_id, struct cm_id_private, id);
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@ -2666,7 +2680,8 @@ static int cm_sidr_req_handler(struct cm_work *work)
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spin_unlock_irqrestore(&cm.lock, flags);
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goto out; /* Duplicate message. */
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}
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cur_cm_id_priv = cm_find_listen(sidr_req_msg->service_id);
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cur_cm_id_priv = cm_find_listen(cm_id->device,
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sidr_req_msg->service_id);
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if (!cur_cm_id_priv) {
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rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table);
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spin_unlock_irqrestore(&cm.lock, flags);
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@ -52,12 +52,20 @@ MODULE_AUTHOR("Libor Michalek");
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MODULE_DESCRIPTION("InfiniBand userspace Connection Manager access");
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MODULE_LICENSE("Dual BSD/GPL");
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struct ib_ucm_device {
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int devnum;
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struct cdev dev;
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struct class_device class_dev;
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struct ib_device *ib_dev;
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};
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struct ib_ucm_file {
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struct semaphore mutex;
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struct file *filp;
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struct ib_ucm_device *device;
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struct list_head ctxs; /* list of active connections */
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struct list_head events; /* list of pending events */
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struct list_head ctxs;
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struct list_head events;
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wait_queue_head_t poll_wait;
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};
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@ -90,14 +98,24 @@ struct ib_ucm_event {
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enum {
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IB_UCM_MAJOR = 231,
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IB_UCM_MINOR = 255
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IB_UCM_BASE_MINOR = 224,
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IB_UCM_MAX_DEVICES = 32
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};
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#define IB_UCM_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_MINOR)
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#define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR)
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static struct semaphore ctx_id_mutex;
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static struct idr ctx_id_table;
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static void ib_ucm_add_one(struct ib_device *device);
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static void ib_ucm_remove_one(struct ib_device *device);
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static struct ib_client ucm_client = {
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.name = "ucm",
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.add = ib_ucm_add_one,
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.remove = ib_ucm_remove_one
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};
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DECLARE_MUTEX(ctx_id_mutex);
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DEFINE_IDR(ctx_id_table);
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static DECLARE_BITMAP(dev_map, IB_UCM_MAX_DEVICES);
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static struct ib_ucm_context *ib_ucm_ctx_get(struct ib_ucm_file *file, int id)
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{
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@ -184,10 +202,7 @@ error:
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kfree(ctx);
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return NULL;
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}
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/*
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* Event portion of the API, handle CM events
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* and allow event polling.
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*/
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static void ib_ucm_event_path_get(struct ib_ucm_path_rec *upath,
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struct ib_sa_path_rec *kpath)
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{
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@ -234,6 +249,7 @@ static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq,
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ureq->retry_count = kreq->retry_count;
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ureq->rnr_retry_count = kreq->rnr_retry_count;
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ureq->srq = kreq->srq;
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ureq->port = kreq->port;
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ib_ucm_event_path_get(&ureq->primary_path, kreq->primary_path);
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ib_ucm_event_path_get(&ureq->alternate_path, kreq->alternate_path);
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@ -320,6 +336,8 @@ static int ib_ucm_event_process(struct ib_cm_event *evt,
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case IB_CM_SIDR_REQ_RECEIVED:
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uvt->resp.u.sidr_req_resp.pkey =
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evt->param.sidr_req_rcvd.pkey;
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uvt->resp.u.sidr_req_resp.port =
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evt->param.sidr_req_rcvd.port;
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uvt->data_len = IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE;
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break;
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case IB_CM_SIDR_REP_RECEIVED:
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@ -412,9 +430,7 @@ static ssize_t ib_ucm_event(struct ib_ucm_file *file,
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if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
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return -EFAULT;
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/*
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* wait
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*/
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down(&file->mutex);
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while (list_empty(&file->events)) {
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@ -496,7 +512,6 @@ done:
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return result;
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}
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static ssize_t ib_ucm_create_id(struct ib_ucm_file *file,
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const char __user *inbuf,
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int in_len, int out_len)
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@ -519,29 +534,27 @@ static ssize_t ib_ucm_create_id(struct ib_ucm_file *file,
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return -ENOMEM;
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ctx->uid = cmd.uid;
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ctx->cm_id = ib_create_cm_id(ib_ucm_event_handler, ctx);
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ctx->cm_id = ib_create_cm_id(file->device->ib_dev,
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ib_ucm_event_handler, ctx);
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if (IS_ERR(ctx->cm_id)) {
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result = PTR_ERR(ctx->cm_id);
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goto err;
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goto err1;
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}
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resp.id = ctx->id;
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if (copy_to_user((void __user *)(unsigned long)cmd.response,
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&resp, sizeof(resp))) {
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result = -EFAULT;
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goto err;
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goto err2;
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}
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return 0;
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err:
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err2:
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ib_destroy_cm_id(ctx->cm_id);
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err1:
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down(&ctx_id_mutex);
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idr_remove(&ctx_id_table, ctx->id);
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up(&ctx_id_mutex);
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if (!IS_ERR(ctx->cm_id))
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ib_destroy_cm_id(ctx->cm_id);
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kfree(ctx);
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return result;
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}
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@ -1253,6 +1266,7 @@ static int ib_ucm_open(struct inode *inode, struct file *filp)
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filp->private_data = file;
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file->filp = filp;
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file->device = container_of(inode->i_cdev, struct ib_ucm_device, dev);
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return 0;
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}
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@ -1283,7 +1297,17 @@ static int ib_ucm_close(struct inode *inode, struct file *filp)
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return 0;
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}
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static struct file_operations ib_ucm_fops = {
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static void ib_ucm_release_class_dev(struct class_device *class_dev)
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{
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struct ib_ucm_device *dev;
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dev = container_of(class_dev, struct ib_ucm_device, class_dev);
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cdev_del(&dev->dev);
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clear_bit(dev->devnum, dev_map);
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kfree(dev);
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}
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static struct file_operations ucm_fops = {
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.owner = THIS_MODULE,
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.open = ib_ucm_open,
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.release = ib_ucm_close,
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@ -1291,55 +1315,141 @@ static struct file_operations ib_ucm_fops = {
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.poll = ib_ucm_poll,
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};
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static struct class ucm_class = {
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.name = "infiniband_cm",
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.release = ib_ucm_release_class_dev
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};
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static struct class *ib_ucm_class;
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static struct cdev ib_ucm_cdev;
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static ssize_t show_dev(struct class_device *class_dev, char *buf)
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{
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struct ib_ucm_device *dev;
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dev = container_of(class_dev, struct ib_ucm_device, class_dev);
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return print_dev_t(buf, dev->dev.dev);
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}
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static CLASS_DEVICE_ATTR(dev, S_IRUGO, show_dev, NULL);
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static ssize_t show_ibdev(struct class_device *class_dev, char *buf)
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{
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struct ib_ucm_device *dev;
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dev = container_of(class_dev, struct ib_ucm_device, class_dev);
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return sprintf(buf, "%s\n", dev->ib_dev->name);
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}
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static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
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static void ib_ucm_add_one(struct ib_device *device)
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{
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struct ib_ucm_device *ucm_dev;
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if (!device->alloc_ucontext)
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return;
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ucm_dev = kmalloc(sizeof *ucm_dev, GFP_KERNEL);
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if (!ucm_dev)
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return;
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memset(ucm_dev, 0, sizeof *ucm_dev);
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ucm_dev->ib_dev = device;
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ucm_dev->devnum = find_first_zero_bit(dev_map, IB_UCM_MAX_DEVICES);
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if (ucm_dev->devnum >= IB_UCM_MAX_DEVICES)
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goto err;
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set_bit(ucm_dev->devnum, dev_map);
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cdev_init(&ucm_dev->dev, &ucm_fops);
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ucm_dev->dev.owner = THIS_MODULE;
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kobject_set_name(&ucm_dev->dev.kobj, "ucm%d", ucm_dev->devnum);
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if (cdev_add(&ucm_dev->dev, IB_UCM_BASE_DEV + ucm_dev->devnum, 1))
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goto err;
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ucm_dev->class_dev.class = &ucm_class;
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ucm_dev->class_dev.dev = device->dma_device;
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snprintf(ucm_dev->class_dev.class_id, BUS_ID_SIZE, "ucm%d",
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ucm_dev->devnum);
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if (class_device_register(&ucm_dev->class_dev))
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goto err_cdev;
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if (class_device_create_file(&ucm_dev->class_dev,
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&class_device_attr_dev))
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goto err_class;
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if (class_device_create_file(&ucm_dev->class_dev,
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&class_device_attr_ibdev))
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goto err_class;
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ib_set_client_data(device, &ucm_client, ucm_dev);
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return;
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err_class:
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class_device_unregister(&ucm_dev->class_dev);
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err_cdev:
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cdev_del(&ucm_dev->dev);
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clear_bit(ucm_dev->devnum, dev_map);
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err:
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kfree(ucm_dev);
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return;
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}
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static void ib_ucm_remove_one(struct ib_device *device)
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{
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struct ib_ucm_device *ucm_dev = ib_get_client_data(device, &ucm_client);
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if (!ucm_dev)
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return;
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class_device_unregister(&ucm_dev->class_dev);
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}
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static ssize_t show_abi_version(struct class *class, char *buf)
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{
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return sprintf(buf, "%d\n", IB_USER_CM_ABI_VERSION);
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}
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static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
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static int __init ib_ucm_init(void)
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{
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int result;
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int ret;
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result = register_chrdev_region(IB_UCM_DEV, 1, "infiniband_cm");
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if (result) {
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printk(KERN_ERR "ucm: Error <%d> registering dev\n", result);
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goto err_chr;
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ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES,
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"infiniband_cm");
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if (ret) {
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printk(KERN_ERR "ucm: couldn't register device number\n");
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goto err;
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}
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cdev_init(&ib_ucm_cdev, &ib_ucm_fops);
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result = cdev_add(&ib_ucm_cdev, IB_UCM_DEV, 1);
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if (result) {
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printk(KERN_ERR "ucm: Error <%d> adding cdev\n", result);
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goto err_cdev;
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ret = class_register(&ucm_class);
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if (ret) {
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printk(KERN_ERR "ucm: couldn't create class infiniband_cm\n");
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goto err_chrdev;
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}
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ib_ucm_class = class_create(THIS_MODULE, "infiniband_cm");
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if (IS_ERR(ib_ucm_class)) {
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result = PTR_ERR(ib_ucm_class);
|
||||
printk(KERN_ERR "Error <%d> creating class\n", result);
|
||||
ret = class_create_file(&ucm_class, &class_attr_abi_version);
|
||||
if (ret) {
|
||||
printk(KERN_ERR "ucm: couldn't create abi_version attribute\n");
|
||||
goto err_class;
|
||||
}
|
||||
|
||||
class_device_create(ib_ucm_class, IB_UCM_DEV, NULL, "ucm");
|
||||
|
||||
idr_init(&ctx_id_table);
|
||||
init_MUTEX(&ctx_id_mutex);
|
||||
|
||||
ret = ib_register_client(&ucm_client);
|
||||
if (ret) {
|
||||
printk(KERN_ERR "ucm: couldn't register client\n");
|
||||
goto err_class;
|
||||
}
|
||||
return 0;
|
||||
|
||||
err_class:
|
||||
cdev_del(&ib_ucm_cdev);
|
||||
err_cdev:
|
||||
unregister_chrdev_region(IB_UCM_DEV, 1);
|
||||
err_chr:
|
||||
return result;
|
||||
class_unregister(&ucm_class);
|
||||
err_chrdev:
|
||||
unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES);
|
||||
err:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit ib_ucm_cleanup(void)
|
||||
{
|
||||
class_device_destroy(ib_ucm_class, IB_UCM_DEV);
|
||||
class_destroy(ib_ucm_class);
|
||||
cdev_del(&ib_ucm_cdev);
|
||||
unregister_chrdev_region(IB_UCM_DEV, 1);
|
||||
ib_unregister_client(&ucm_client);
|
||||
class_unregister(&ucm_class);
|
||||
unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES);
|
||||
}
|
||||
|
||||
module_init(ib_ucm_init);
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
/*
|
||||
* Copyright (c) 2004 Intel Corporation. All rights reserved.
|
||||
* Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
|
||||
* Copyright (c) 2004 Topspin Corporation. All rights reserved.
|
||||
* Copyright (c) 2004 Voltaire Corporation. All rights reserved.
|
||||
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
|
||||
@ -109,7 +109,6 @@ struct ib_cm_id;
|
||||
|
||||
struct ib_cm_req_event_param {
|
||||
struct ib_cm_id *listen_id;
|
||||
struct ib_device *device;
|
||||
u8 port;
|
||||
|
||||
struct ib_sa_path_rec *primary_path;
|
||||
@ -220,7 +219,6 @@ struct ib_cm_apr_event_param {
|
||||
|
||||
struct ib_cm_sidr_req_event_param {
|
||||
struct ib_cm_id *listen_id;
|
||||
struct ib_device *device;
|
||||
u8 port;
|
||||
u16 pkey;
|
||||
};
|
||||
@ -284,6 +282,7 @@ typedef int (*ib_cm_handler)(struct ib_cm_id *cm_id,
|
||||
struct ib_cm_id {
|
||||
ib_cm_handler cm_handler;
|
||||
void *context;
|
||||
struct ib_device *device;
|
||||
__be64 service_id;
|
||||
__be64 service_mask;
|
||||
enum ib_cm_state state; /* internal CM/debug use */
|
||||
@ -295,6 +294,8 @@ struct ib_cm_id {
|
||||
|
||||
/**
|
||||
* ib_create_cm_id - Allocate a communication identifier.
|
||||
* @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.
|
||||
* @context: User specified context associated with the communication
|
||||
* identifier.
|
||||
@ -302,7 +303,8 @@ struct ib_cm_id {
|
||||
* Communication identifiers are used to track connection states, service
|
||||
* ID resolution requests, and listen requests.
|
||||
*/
|
||||
struct ib_cm_id *ib_create_cm_id(ib_cm_handler cm_handler,
|
||||
struct ib_cm_id *ib_create_cm_id(struct ib_device *device,
|
||||
ib_cm_handler cm_handler,
|
||||
void *context);
|
||||
|
||||
/**
|
||||
|
||||
@ -38,7 +38,7 @@
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
#define IB_USER_CM_ABI_VERSION 2
|
||||
#define IB_USER_CM_ABI_VERSION 3
|
||||
|
||||
enum {
|
||||
IB_USER_CM_CMD_CREATE_ID,
|
||||
@ -299,8 +299,6 @@ struct ib_ucm_event_get {
|
||||
};
|
||||
|
||||
struct ib_ucm_req_event_resp {
|
||||
/* device */
|
||||
/* port */
|
||||
struct ib_ucm_path_rec primary_path;
|
||||
struct ib_ucm_path_rec alternate_path;
|
||||
__be64 remote_ca_guid;
|
||||
@ -316,6 +314,7 @@ struct ib_ucm_req_event_resp {
|
||||
__u8 retry_count;
|
||||
__u8 rnr_retry_count;
|
||||
__u8 srq;
|
||||
__u8 port;
|
||||
};
|
||||
|
||||
struct ib_ucm_rep_event_resp {
|
||||
@ -353,10 +352,9 @@ struct ib_ucm_apr_event_resp {
|
||||
};
|
||||
|
||||
struct ib_ucm_sidr_req_event_resp {
|
||||
/* device */
|
||||
/* port */
|
||||
__u16 pkey;
|
||||
__u8 reserved[2];
|
||||
__u8 port;
|
||||
__u8 reserved;
|
||||
};
|
||||
|
||||
struct ib_ucm_sidr_rep_event_resp {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user