cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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u_os_desc.h (3095B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * u_os_desc.h
      4 *
      5 * Utility definitions for "OS Descriptors" support
      6 *
      7 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
      8 *		http://www.samsung.com
      9 *
     10 * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
     11 */
     12
     13#ifndef __U_OS_DESC_H__
     14#define __U_OS_DESC_H__
     15
     16#include <asm/unaligned.h>
     17#include <linux/nls.h>
     18
     19#define USB_EXT_PROP_DW_SIZE			0
     20#define USB_EXT_PROP_DW_PROPERTY_DATA_TYPE	4
     21#define USB_EXT_PROP_W_PROPERTY_NAME_LENGTH	8
     22#define USB_EXT_PROP_B_PROPERTY_NAME		10
     23#define USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH	10
     24#define USB_EXT_PROP_B_PROPERTY_DATA		14
     25
     26#define USB_EXT_PROP_RESERVED			0
     27#define USB_EXT_PROP_UNICODE			1
     28#define USB_EXT_PROP_UNICODE_ENV		2
     29#define USB_EXT_PROP_BINARY			3
     30#define USB_EXT_PROP_LE32			4
     31#define USB_EXT_PROP_BE32			5
     32#define USB_EXT_PROP_UNICODE_LINK		6
     33#define USB_EXT_PROP_UNICODE_MULTI		7
     34
     35static inline u8 *__usb_ext_prop_ptr(u8 *buf, size_t offset)
     36{
     37	return buf + offset;
     38}
     39
     40static inline u8 *usb_ext_prop_size_ptr(u8 *buf)
     41{
     42	return __usb_ext_prop_ptr(buf, USB_EXT_PROP_DW_SIZE);
     43}
     44
     45static inline u8 *usb_ext_prop_type_ptr(u8 *buf)
     46{
     47	return __usb_ext_prop_ptr(buf, USB_EXT_PROP_DW_PROPERTY_DATA_TYPE);
     48}
     49
     50static inline u8 *usb_ext_prop_name_len_ptr(u8 *buf)
     51{
     52	return __usb_ext_prop_ptr(buf, USB_EXT_PROP_W_PROPERTY_NAME_LENGTH);
     53}
     54
     55static inline u8 *usb_ext_prop_name_ptr(u8 *buf)
     56{
     57	return __usb_ext_prop_ptr(buf, USB_EXT_PROP_B_PROPERTY_NAME);
     58}
     59
     60static inline u8 *usb_ext_prop_data_len_ptr(u8 *buf, size_t off)
     61{
     62	return __usb_ext_prop_ptr(buf,
     63				  USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH + off);
     64}
     65
     66static inline u8 *usb_ext_prop_data_ptr(u8 *buf, size_t off)
     67{
     68	return __usb_ext_prop_ptr(buf, USB_EXT_PROP_B_PROPERTY_DATA + off);
     69}
     70
     71static inline void usb_ext_prop_put_size(u8 *buf, int dw_size)
     72{
     73	put_unaligned_le32(dw_size, usb_ext_prop_size_ptr(buf));
     74}
     75
     76static inline void usb_ext_prop_put_type(u8 *buf, int type)
     77{
     78	put_unaligned_le32(type, usb_ext_prop_type_ptr(buf));
     79}
     80
     81static inline int usb_ext_prop_put_name(u8 *buf, const char *name, int pnl)
     82{
     83	int result;
     84
     85	put_unaligned_le16(pnl, usb_ext_prop_name_len_ptr(buf));
     86	result = utf8s_to_utf16s(name, strlen(name), UTF16_LITTLE_ENDIAN,
     87		(wchar_t *) usb_ext_prop_name_ptr(buf), pnl - 2);
     88	if (result < 0)
     89		return result;
     90
     91	put_unaligned_le16(0, &buf[USB_EXT_PROP_B_PROPERTY_NAME + pnl - 2]);
     92
     93	return pnl;
     94}
     95
     96static inline void usb_ext_prop_put_binary(u8 *buf, int pnl, const u8 *data,
     97					   int data_len)
     98{
     99	put_unaligned_le32(data_len, usb_ext_prop_data_len_ptr(buf, pnl));
    100	memcpy(usb_ext_prop_data_ptr(buf, pnl), data, data_len);
    101}
    102
    103static inline int usb_ext_prop_put_unicode(u8 *buf, int pnl, const char *string,
    104					   int data_len)
    105{
    106	int result;
    107	put_unaligned_le32(data_len, usb_ext_prop_data_len_ptr(buf, pnl));
    108	result = utf8s_to_utf16s(string, data_len >> 1, UTF16_LITTLE_ENDIAN,
    109			(wchar_t *) usb_ext_prop_data_ptr(buf, pnl),
    110			data_len - 2);
    111	if (result < 0)
    112		return result;
    113
    114	put_unaligned_le16(0,
    115		&buf[USB_EXT_PROP_B_PROPERTY_DATA + pnl + data_len - 2]);
    116
    117	return data_len;
    118}
    119
    120#endif /* __U_OS_DESC_H__ */