1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3 * Intel MIC Platform Software Stack (MPSS)
4 *
5 * Copyright(c) 2013 Intel Corporation.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License, version 2, as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * The full GNU General Public License is included in this distribution in
17 * the file called "COPYING".
18 *
19 * Intel MIC Host driver.
20 *
21 */
22 #ifndef _MIC_IOCTL_H_
23 #define _MIC_IOCTL_H_
24
25 #include <linux/types.h>
26
27 /*
28 * mic_copy - MIC virtio descriptor copy.
29 *
30 * @iov: An array of IOVEC structures containing user space buffers.
31 * @iovcnt: Number of IOVEC structures in iov.
32 * @vr_idx: The vring index.
33 * @update_used: A non zero value results in used index being updated.
34 * @out_len: The aggregate of the total length written to or read from
35 * the virtio device.
36 */
37 struct mic_copy_desc {
38 #ifdef __KERNEL__
39 struct iovec __user *iov;
40 #else
41 struct iovec *iov;
42 #endif
43 __u32 iovcnt;
44 __u8 vr_idx;
45 __u8 update_used;
46 __u32 out_len;
47 };
48
49 /*
50 * Add a new virtio device
51 * The (struct mic_device_desc *) pointer points to a device page entry
52 * for the virtio device consisting of:
53 * - struct mic_device_desc
54 * - struct mic_vqconfig (num_vq of these)
55 * - host and guest features
56 * - virtio device config space
57 * The total size referenced by the pointer should equal the size returned
58 * by desc_size() in mic_common.h
59 */
60 #define MIC_VIRTIO_ADD_DEVICE _IOWR('s', 1, struct mic_device_desc *)
61
62 /*
63 * Copy the number of entries in the iovec and update the used index
64 * if requested by the user.
65 */
66 #define MIC_VIRTIO_COPY_DESC _IOWR('s', 2, struct mic_copy_desc *)
67
68 /*
69 * Notify virtio device of a config change
70 * The (__u8 *) pointer points to config space values for the device
71 * as they should be written into the device page. The total size
72 * referenced by the pointer should equal the config_len field of struct
73 * mic_device_desc.
74 */
75 #define MIC_VIRTIO_CONFIG_CHANGE _IOWR('s', 5, __u8 *)
76
77 #endif