Ejemplo n.º 1
0
void c2_ae_event(struct c2_dev *c2dev, u32 mq_index)
{
	struct c2_mq *mq = c2dev->qptr_array[mq_index];
	union c2wr *wr;
	void *resource_user_context;
	struct iw_cm_event cm_event;
	struct ib_event ib_event;
	enum c2_resource_indicator resource_indicator;
	enum c2_event_id event_id;
	unsigned long flags;
	int status;

	/*
	 * retrieve the message
	 */
	wr = c2_mq_consume(mq);
	if (!wr)
		return;

	memset(&ib_event, 0, sizeof(ib_event));
	memset(&cm_event, 0, sizeof(cm_event));

	event_id = c2_wr_get_id(wr);
	resource_indicator = be32_to_cpu(wr->ae.ae_generic.resource_type);
	resource_user_context =
	    (void *) (unsigned long) wr->ae.ae_generic.user_context;

	status = cm_event.status = c2_convert_cm_status(c2_wr_get_result(wr));

	pr_debug("event received c2_dev=%p, event_id=%d, "
		"resource_indicator=%d, user_context=%p, status = %d\n",
		c2dev, event_id, resource_indicator, resource_user_context,
		status);

	switch (resource_indicator) {
	case C2_RES_IND_QP:{

		struct c2_qp *qp = (struct c2_qp *)resource_user_context;
		struct iw_cm_id *cm_id = qp->cm_id;
		struct c2wr_ae_active_connect_results *res;

		if (!cm_id) {
			pr_debug("event received, but cm_id is <nul>, qp=%p!\n",
				qp);
			goto ignore_it;
		}
		pr_debug("%s: event = %s, user_context=%llx, "
			"resource_type=%x, "
			"resource=%x, qp_state=%s\n",
			__func__,
			to_event_str(event_id),
			(unsigned long long) wr->ae.ae_generic.user_context,
			be32_to_cpu(wr->ae.ae_generic.resource_type),
			be32_to_cpu(wr->ae.ae_generic.resource),
			to_qp_state_str(be32_to_cpu(wr->ae.ae_generic.qp_state)));

		c2_set_qp_state(qp, be32_to_cpu(wr->ae.ae_generic.qp_state));

		switch (event_id) {
		case CCAE_ACTIVE_CONNECT_RESULTS:
			res = &wr->ae.ae_active_connect_results;
			cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
			cm_event.local_addr.sin_addr.s_addr = res->laddr;
			cm_event.remote_addr.sin_addr.s_addr = res->raddr;
			cm_event.local_addr.sin_port = res->lport;
			cm_event.remote_addr.sin_port =	res->rport;
			if (status == 0) {
				cm_event.private_data_len =
					be32_to_cpu(res->private_data_length);
				cm_event.private_data = res->private_data;
			} else {
				spin_lock_irqsave(&qp->lock, flags);
				if (qp->cm_id) {
					qp->cm_id->rem_ref(qp->cm_id);
					qp->cm_id = NULL;
				}
				spin_unlock_irqrestore(&qp->lock, flags);
				cm_event.private_data_len = 0;
				cm_event.private_data = NULL;
			}
			if (cm_id->event_handler)
				cm_id->event_handler(cm_id, &cm_event);
			break;
		case CCAE_TERMINATE_MESSAGE_RECEIVED:
		case CCAE_CQ_SQ_COMPLETION_OVERFLOW:
			ib_event.device = &c2dev->ibdev;
			ib_event.element.qp = &qp->ibqp;
			ib_event.event = IB_EVENT_QP_REQ_ERR;

			if (qp->ibqp.event_handler)
				qp->ibqp.event_handler(&ib_event,
						       qp->ibqp.
						       qp_context);
			break;
		case CCAE_BAD_CLOSE:
		case CCAE_LLP_CLOSE_COMPLETE:
		case CCAE_LLP_CONNECTION_RESET:
		case CCAE_LLP_CONNECTION_LOST:
			BUG_ON(cm_id->event_handler==(void*)0x6b6b6b6b);

			spin_lock_irqsave(&qp->lock, flags);
			if (qp->cm_id) {
				qp->cm_id->rem_ref(qp->cm_id);
				qp->cm_id = NULL;
			}
			spin_unlock_irqrestore(&qp->lock, flags);
			cm_event.event = IW_CM_EVENT_CLOSE;
			cm_event.status = 0;
			if (cm_id->event_handler)
				cm_id->event_handler(cm_id, &cm_event);
			break;
		default:
			BUG_ON(1);
			pr_debug("%s:%d Unexpected event_id=%d on QP=%p, "
				"CM_ID=%p\n",
				__func__, __LINE__,
				event_id, qp, cm_id);
			break;
		}
		break;
	}

	case C2_RES_IND_EP:{

		struct c2wr_ae_connection_request *req =
			&wr->ae.ae_connection_request;
		struct iw_cm_id *cm_id =
			(struct iw_cm_id *)resource_user_context;

		pr_debug("C2_RES_IND_EP event_id=%d\n", event_id);
		if (event_id != CCAE_CONNECTION_REQUEST) {
			pr_debug("%s: Invalid event_id: %d\n",
				__func__, event_id);
			break;
		}
		cm_event.event = IW_CM_EVENT_CONNECT_REQUEST;
		cm_event.provider_data = (void*)(unsigned long)req->cr_handle;
		cm_event.local_addr.sin_addr.s_addr = req->laddr;
		cm_event.remote_addr.sin_addr.s_addr = req->raddr;
		cm_event.local_addr.sin_port = req->lport;
		cm_event.remote_addr.sin_port = req->rport;
		cm_event.private_data_len =
			be32_to_cpu(req->private_data_length);
		cm_event.private_data = req->private_data;
		/*
		 * Until ird/ord negotiation via MPAv2 support is added, send
		 * max supported values
		 */
		cm_event.ird = cm_event.ord = 128;

		if (cm_id->event_handler)
			cm_id->event_handler(cm_id, &cm_event);
		break;
	}

	case C2_RES_IND_CQ:{
		struct c2_cq *cq =
		    (struct c2_cq *) resource_user_context;

		pr_debug("IB_EVENT_CQ_ERR\n");
		ib_event.device = &c2dev->ibdev;
		ib_event.element.cq = &cq->ibcq;
		ib_event.event = IB_EVENT_CQ_ERR;

		if (cq->ibcq.event_handler)
			cq->ibcq.event_handler(&ib_event,
					       cq->ibcq.cq_context);
	}

	default:
		printk("Bad resource indicator = %d\n",
		       resource_indicator);
		break;
	}

 ignore_it:
	c2_mq_free(mq);
}
Ejemplo n.º 2
0
static inline int c2_poll_one(struct c2_dev *c2dev,
			      struct c2_cq *cq, struct ib_wc *entry)
{
	struct c2wr_ce *ce;
	struct c2_qp *qp;
	int is_recv = 0;

	ce = c2_mq_consume(&cq->mq);
	if (!ce) {
		return -EAGAIN;
	}

	/*
	 * if the qp returned is null then this qp has already
	 * been freed and we are unable process the completion.
	 * try pulling the next message
	 */
	while ((qp =
		(struct c2_qp *) (unsigned long) ce->qp_user_context) == NULL) {
		c2_mq_free(&cq->mq);
		ce = c2_mq_consume(&cq->mq);
		if (!ce)
			return -EAGAIN;
	}

	entry->status = c2_cqe_status_to_openib(c2_wr_get_result(ce));
	entry->wr_id = ce->hdr.context;
	entry->qp = &qp->ibqp;
	entry->wc_flags = 0;
	entry->slid = 0;
	entry->sl = 0;
	entry->src_qp = 0;
	entry->dlid_path_bits = 0;
	entry->pkey_index = 0;

	switch (c2_wr_get_id(ce)) {
	case C2_WR_TYPE_SEND:
		entry->opcode = IB_WC_SEND;
		break;
	case C2_WR_TYPE_RDMA_WRITE:
		entry->opcode = IB_WC_RDMA_WRITE;
		break;
	case C2_WR_TYPE_RDMA_READ:
		entry->opcode = IB_WC_RDMA_READ;
		break;
	case C2_WR_TYPE_RECV:
		entry->byte_len = be32_to_cpu(ce->bytes_rcvd);
		entry->opcode = IB_WC_RECV;
		is_recv = 1;
		break;
	default:
		break;
	}

	/* consume the WQEs */
	if (is_recv)
		c2_mq_lconsume(&qp->rq_mq, 1);
	else
		c2_mq_lconsume(&qp->sq_mq,
			       be32_to_cpu(c2_wr_get_wqe_count(ce)) + 1);

	/* free the message */
	c2_mq_free(&cq->mq);

	return 0;
}
Ejemplo n.º 3
0
/*
 * Handles verbs WR replies.
 */
static void handle_vq(struct c2_dev *c2dev, u32 mq_index)
{
	void *adapter_msg, *reply_msg;
	struct c2wr_hdr *host_msg;
	struct c2wr_hdr tmp;
	struct c2_mq *reply_vq;
	struct c2_vq_req *req;
	struct iw_cm_event cm_event;
	int err;

	reply_vq = c2dev->qptr_array[mq_index];

	/*
	 * get next msg from mq_index into adapter_msg.
	 * don't free it yet.
	 */
	adapter_msg = c2_mq_consume(reply_vq);
	if (adapter_msg == NULL) {
		return;
	}

	host_msg = vq_repbuf_alloc(c2dev);

	/*
	 * If we can't get a host buffer, then we'll still
	 * wakeup the waiter, we just won't give him the msg.
	 * It is assumed the waiter will deal with this...
	 */
	if (!host_msg) {
		pr_debug("handle_vq: no repbufs!\n");

		/*
		 * just copy the WR header into a local variable.
		 * this allows us to still demux on the context
		 */
		host_msg = &tmp;
		memcpy(host_msg, adapter_msg, sizeof(tmp));
		reply_msg = NULL;
	} else {
		memcpy(host_msg, adapter_msg, reply_vq->msg_size);
		reply_msg = host_msg;
	}

	/*
	 * consume the msg from the MQ
	 */
	c2_mq_free(reply_vq);

	/*
	 * wakeup the waiter.
	 */
	req = (struct c2_vq_req *) (unsigned long) host_msg->context;
	if (req == NULL) {
		/*
		 * We should never get here, as the adapter should
		 * never send us a reply that we're not expecting.
		 */
		if (reply_msg != NULL)
			vq_repbuf_free(c2dev, host_msg);
		pr_debug("handle_vq: UNEXPECTEDLY got NULL req\n");
		return;
	}

	if (reply_msg)
		err = c2_errno(reply_msg);
	else
		err = -ENOMEM;

	if (!err) switch (req->event) {
	case IW_CM_EVENT_ESTABLISHED:
		c2_set_qp_state(req->qp,
				C2_QP_STATE_RTS);
		/*
		 * Until ird/ord negotiation via MPAv2 support is added, send
		 * max supported values
		 */
		cm_event.ird = cm_event.ord = 128;
	case IW_CM_EVENT_CLOSE:

		/*
		 * Move the QP to RTS if this is
		 * the established event
		 */
		cm_event.event = req->event;
		cm_event.status = 0;
		cm_event.local_addr = req->cm_id->local_addr;
		cm_event.remote_addr = req->cm_id->remote_addr;
		cm_event.private_data = NULL;
		cm_event.private_data_len = 0;
		req->cm_id->event_handler(req->cm_id, &cm_event);
		break;
	default:
		break;
	}

	req->reply_msg = (u64) (unsigned long) (reply_msg);
	atomic_set(&req->reply_ready, 1);
	wake_up(&req->wait_object);

	/*
	 * If the request was cancelled, then this put will
	 * free the vq_req memory...and reply_msg!!!
	 */
	vq_req_put(c2dev, req);
}