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 */ 36 struct 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