e47937d1b7
The NTB allows you to connect two systems with this device using a PCI-e link. The driver is made of two modules: - ntb_hw which is a basic hardware abstraction layer for the device. - if_ntb which implements the ntb network device and the communication protocol. The driver is limited at the moment to CPU memcpy instead of using DMA, and only Back-to-Back mode is supported. Also the network device isn't full featured yet. These changes will be coming soon. The DMA change will also bring in the ioat driver from the project branch it is on now. This is an initial port of the GPL/BSD Linux driver contributed by Jon Mason from Intel. Any bugs are my contributions. Sponsored by: Intel Reviewed by: jimharris, joel (man page only) Approved by: jimharris (mentor)
74 lines
3.0 KiB
C
74 lines
3.0 KiB
C
/*-
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* Copyright (C) 2013 Intel Corporation
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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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#ifndef _NTB_HW_H_
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#define _NTB_HW_H_
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struct ntb_softc;
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#define NTB_NUM_MW 2
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#define NTB_LINK_DOWN 0
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#define NTB_LINK_UP 1
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enum ntb_hw_event {
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NTB_EVENT_SW_EVENT0 = 0,
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NTB_EVENT_SW_EVENT1,
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NTB_EVENT_SW_EVENT2,
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NTB_EVENT_HW_ERROR,
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NTB_EVENT_HW_LINK_UP,
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NTB_EVENT_HW_LINK_DOWN,
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};
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typedef void (*ntb_db_callback)(void *data, int db_num);
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typedef void (*ntb_event_callback)(void *data, enum ntb_hw_event event);
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int ntb_register_event_callback(struct ntb_softc *ntb, ntb_event_callback func);
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void ntb_unregister_event_callback(struct ntb_softc *ntb);
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int ntb_register_db_callback(struct ntb_softc *ntb, unsigned int idx,
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void *data, ntb_db_callback func);
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void ntb_unregister_db_callback(struct ntb_softc *ntb, unsigned int idx);
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void *ntb_find_transport(struct ntb_softc *ntb);
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struct ntb_softc *ntb_register_transport(struct ntb_softc *ntb,
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void *transport);
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void ntb_unregister_transport(struct ntb_softc *ntb);
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int ntb_get_max_spads(struct ntb_softc *ntb);
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int ntb_write_local_spad(struct ntb_softc *ntb, unsigned int idx, uint32_t val);
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int ntb_read_local_spad(struct ntb_softc *ntb, unsigned int idx, uint32_t *val);
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int ntb_write_remote_spad(struct ntb_softc *ntb, unsigned int idx,
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uint32_t val);
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int ntb_read_remote_spad(struct ntb_softc *ntb, unsigned int idx,
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uint32_t *val);
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void *ntb_get_mw_vbase(struct ntb_softc *ntb, unsigned int mw);
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vm_paddr_t ntb_get_mw_pbase(struct ntb_softc *ntb, unsigned int mw);
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u_long ntb_get_mw_size(struct ntb_softc *ntb, unsigned int mw);
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void ntb_set_mw_addr(struct ntb_softc *ntb, unsigned int mw, uint64_t addr);
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void ntb_ring_sdb(struct ntb_softc *ntb, unsigned int db);
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bool ntb_query_link_status(struct ntb_softc *ntb);
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#endif /* _NTB_HW_H_ */
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