1/*
2 * Intel MIC Platform Software Stack (MPSS)
3 *
4 * Copyright(c) 2013 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 * The full GNU General Public License is included in this distribution in
16 * the file called "COPYING".
17 *
18 * Intel MIC Host driver.
19 *
20 */
21#ifndef _MIC_IOCTL_H_
22#define _MIC_IOCTL_H_
23
24#include <linux/types.h>
25
26/*
27 * mic_copy - MIC virtio descriptor copy.
28 *
29 * @iov: An array of IOVEC structures containing user space buffers.
30 * @iovcnt: Number of IOVEC structures in iov.
31 * @vr_idx: The vring index.
32 * @update_used: A non zero value results in used index being updated.
33 * @out_len: The aggregate of the total length written to or read from
34 *	the virtio device.
35 */
36struct mic_copy_desc {
37#ifdef __KERNEL__
38	struct iovec __user *iov;
39#else
40	struct iovec *iov;
41#endif
42	__u32 iovcnt;
43	__u8 vr_idx;
44	__u8 update_used;
45	__u32 out_len;
46};
47
48/*
49 * Add a new virtio device
50 * The (struct mic_device_desc *) pointer points to a device page entry
51 *	for the virtio device consisting of:
52 *	- struct mic_device_desc
53 *	- struct mic_vqconfig (num_vq of these)
54 *	- host and guest features
55 *	- virtio device config space
56 * The total size referenced by the pointer should equal the size returned
57 * by desc_size() in mic_common.h
58 */
59#define MIC_VIRTIO_ADD_DEVICE _IOWR('s', 1, struct mic_device_desc *)
60
61/*
62 * Copy the number of entries in the iovec and update the used index
63 * if requested by the user.
64 */
65#define MIC_VIRTIO_COPY_DESC	_IOWR('s', 2, struct mic_copy_desc *)
66
67/*
68 * Notify virtio device of a config change
69 * The (__u8 *) pointer points to config space values for the device
70 * as they should be written into the device page. The total size
71 * referenced by the pointer should equal the config_len field of struct
72 * mic_device_desc.
73 */
74#define MIC_VIRTIO_CONFIG_CHANGE _IOWR('s', 5, __u8 *)
75
76#endif
77