9a5325c205
This follows NTB subsystem modularization in Linux, tuning it to FreeBSD native NewBus interfaces. This change allows to support different types of hardware with different drivers, support multiple NTB instances in a system, ntb_transport module use for needs other then if_ntb, etc. Sponsored by: iXsystems, Inc.
61 lines
2.6 KiB
C
61 lines
2.6 KiB
C
/*-
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* Copyright (c) 2016 Alexander Motin <mav@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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struct ntb_transport_qp;
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extern devclass_t ntb_transport_devclass;
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enum ntb_link_event {
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NTB_LINK_DOWN = 0,
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NTB_LINK_UP,
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};
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struct ntb_queue_handlers {
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void (*rx_handler)(struct ntb_transport_qp *qp, void *qp_data,
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void *data, int len);
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void (*tx_handler)(struct ntb_transport_qp *qp, void *qp_data,
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void *data, int len);
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void (*event_handler)(void *data, enum ntb_link_event status);
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};
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unsigned char ntb_transport_qp_num(struct ntb_transport_qp *qp);
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unsigned int ntb_transport_max_size(struct ntb_transport_qp *qp);
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struct ntb_transport_qp *
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ntb_transport_create_queue(void *data, device_t dev,
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const struct ntb_queue_handlers *handlers);
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void ntb_transport_free_queue(struct ntb_transport_qp *qp);
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int ntb_transport_rx_enqueue(struct ntb_transport_qp *qp, void *cb, void *data,
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unsigned int len);
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int ntb_transport_tx_enqueue(struct ntb_transport_qp *qp, void *cb, void *data,
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unsigned int len);
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void *ntb_transport_rx_remove(struct ntb_transport_qp *qp, unsigned int *len);
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void ntb_transport_link_up(struct ntb_transport_qp *qp);
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void ntb_transport_link_down(struct ntb_transport_qp *qp);
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bool ntb_transport_link_query(struct ntb_transport_qp *qp);
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unsigned int ntb_transport_tx_free_entry(struct ntb_transport_qp *qp);
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