include/uapi/linux/mic_ioctl.h

   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