tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * Intel MIC Platform Software Stack (MPSS)
3 *
4 * Copyright(c) 2014 Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2, as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * Intel SCIF driver.
16 */
17#ifndef _SCIF_PEER_BUS_H_
18#define _SCIF_PEER_BUS_H_
19
20#include <linux/device.h>
21#include <linux/mic_common.h>
22
23/*
24 * Peer devices show up as PCIe devices for the mgmt node but not the cards.
25 * The mgmt node discovers all the cards on the PCIe bus and informs the other
26 * cards about their peers. Upon notification of a peer a node adds a peer
27 * device to the peer bus to maintain symmetry in the way devices are
28 * discovered across all nodes in the SCIF network.
29 */
30/**
31 * scif_peer_dev - representation of a peer SCIF device
32 * @dev: underlying device
33 * @dnode - The destination node which this device will communicate with.
34 */
35struct scif_peer_dev {
36 struct device dev;
37 u8 dnode;
38};
39
40/**
41 * scif_peer_driver - operations for a scif_peer I/O driver
42 * @driver: underlying device driver (populate name and owner).
43 * @id_table: the ids serviced by this driver.
44 * @probe: the function to call when a device is found. Returns 0 or -errno.
45 * @remove: the function to call when a device is removed.
46 */
47struct scif_peer_driver {
48 struct device_driver driver;
49 const struct scif_peer_dev_id *id_table;
50
51 int (*probe)(struct scif_peer_dev *dev);
52 void (*remove)(struct scif_peer_dev *dev);
53};
54
55struct scif_dev;
56
57int scif_peer_register_driver(struct scif_peer_driver *driver);
58void scif_peer_unregister_driver(struct scif_peer_driver *driver);
59
60struct scif_peer_dev *scif_peer_register_device(struct scif_dev *sdev);
61void scif_peer_unregister_device(struct scif_peer_dev *sdev);
62
63int scif_peer_bus_init(void);
64void scif_peer_bus_exit(void);
65#endif /* _SCIF_PEER_BUS_H */