android_kernel_samsung_sm8650-modules/qdf/inc/qdf_util.h

/*
 * Copyright (c) 2014-2016 The Linux Foundation. All rights reserved.
 *
 * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
 *
 *
 * Permission to use, copy, modify, and/or distribute this software for
 * any purpose with or without fee is hereby granted, provided that the
 * above copyright notice and this permission notice appear in all
 * copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * This file was originally distributed by Qualcomm Atheros, Inc.
 * under proprietary terms before Copyright ownership was assigned
 * to the Linux Foundation.
 */

/**
 * DOC: qdf_util.h
 * This file defines utility functions.
 */

#ifndef _QDF_UTIL_H
#define _QDF_UTIL_H

#include <i_qdf_util.h>

/**
 * qdf_unlikely - Compiler-dependent macro denoting code likely to execute
 * @_expr: expression to be checked
 */
#define qdf_unlikely(_expr)     __qdf_unlikely(_expr)

/**
 * qdf_likely - Compiler-dependent macro denoting code unlikely to execute
 * @_expr: expression to be checked
 */
#define qdf_likely(_expr)       __qdf_likely(_expr)

/**
 * qdf_mb - read + write memory barrier.
 */
#define qdf_mb()                 __qdf_mb()

/**
 * qdf_assert - assert "expr" evaluates to false.
 */
#ifdef QDF_DEBUG
#define qdf_assert(expr)         __qdf_assert(expr)
#else
#define qdf_assert(expr)
#endif /* QDF_DEBUG */

/**
 * qdf_assert_always - alway assert "expr" evaluates to false.
 */
#define qdf_assert_always(expr)  __qdf_assert(expr)

/**
 * qdf_target_assert_always - alway target assert "expr" evaluates to false.
 */
#define qdf_target_assert_always(expr)  __qdf_target_assert(expr)

/**
 * QDF_MAX - get maximum of two values
 * @_x: 1st arguement
 * @_y: 2nd arguement
 */
#define QDF_MAX(_x, _y) (((_x) > (_y)) ? (_x) : (_y))

/**
 * QDF_MIN - get minimum of two values
 * @_x: 1st arguement
 * @_y: 2nd arguement
 */
#define QDF_MIN(_x, _y) (((_x) < (_y)) ? (_x) : (_y))

/**
 * qdf_status_to_os_return - returns the status to OS.
 * @status: enum QDF_STATUS
 *
 * returns: int status success/failure
 */
static inline int qdf_status_to_os_return(QDF_STATUS status)
{
	return __qdf_status_to_os_return(status);
}

/**
 * qdf_container_of - cast a member of a structure out to the containing
 * structure
 * @ptr: the pointer to the member.
 * @type: the type of the container struct this is embedded in.
 * @member: the name of the member within the struct.
 */
#define qdf_container_of(ptr, type, member) \
	 __qdf_container_of(ptr, type, member)

/**
 * qdf_is_pwr2 - test input value is power of 2 integer
 * @value: input integer
 */
#define QDF_IS_PWR2(value) (((value) ^ ((value)-1)) == ((value) << 1) - 1)

/**
 * qdf_roundup() - roundup the input value
 * @x: value to roundup
 * @y: input value rounded to multiple of this
 *
 * Return: rounded value
 */
#define qdf_roundup(x, y) __qdf_roundup(x, y)

/**
 * qdf_is_macaddr_equal() - compare two QDF MacAddress
 * @mac_addr1: Pointer to one qdf MacAddress to compare
 * @mac_addr2: Pointer to the other qdf MacAddress to compare
 *
 * This function returns a bool that tells if a two QDF MacAddress'
 * are equivalent.
 *
 * Return: true if the MacAddress's are equal
 * not true if the MacAddress's are not equal
 */
static inline bool qdf_is_macaddr_equal(struct qdf_mac_addr *mac_addr1,
					struct qdf_mac_addr *mac_addr2)
{
	return __qdf_is_macaddr_equal(mac_addr1, mac_addr2);
}


/**
 * qdf_is_macaddr_zero() - check for a MacAddress of all zeros.
 * @mac_addr: pointer to the struct qdf_mac_addr to check.
 *
 * This function returns a bool that tells if a MacAddress is made up of
 * all zeros.
 *
 * Return: true if the MacAddress is all Zeros
 * false if the MacAddress is not all Zeros.
 */
static inline bool qdf_is_macaddr_zero(struct qdf_mac_addr *mac_addr)
{
	struct qdf_mac_addr zero_mac_addr = QDF_MAC_ADDR_ZERO_INITIALIZER;
	return qdf_is_macaddr_equal(mac_addr, &zero_mac_addr);
}

/**
 * qdf_zero_macaddr() - zero out a MacAddress
 * @mac_addr: pointer to the struct qdf_mac_addr to zero.
 *
 * This function zeros out a QDF MacAddress type.
 *
 * Return: none
 */
static inline void qdf_zero_macaddr(struct qdf_mac_addr *mac_addr)
{
	__qdf_zero_macaddr(mac_addr);
}


/**
 * qdf_is_macaddr_group() - check for a MacAddress is a 'group' address
 * @mac_addr1: pointer to the qdf MacAddress to check
 *
 * This function returns a bool that tells if a the input QDF MacAddress
 * is a "group" address. Group addresses have the 'group address bit' turned
 * on in the MacAddress. Group addresses are made up of Broadcast and
 * Multicast addresses.
 *
 * Return: true if the input MacAddress is a Group address
 * false if the input MacAddress is not a Group address
 */
static inline bool qdf_is_macaddr_group(struct qdf_mac_addr *mac_addr)
{
	return mac_addr->bytes[0] & 0x01;
}


/**
 * qdf_is_macaddr_broadcast() - check for a MacAddress is a broadcast address
 * @mac_addr: Pointer to the qdf MacAddress to check
 *
 * This function returns a bool that tells if a the input QDF MacAddress
 * is a "broadcast" address.
 *
 * Return: true if the input MacAddress is a broadcast address
 * flase if the input MacAddress is not a broadcast address
 */
static inline bool qdf_is_macaddr_broadcast(struct qdf_mac_addr *mac_addr)
{
	struct qdf_mac_addr broadcast_mac_addr =
		QDF_MAC_ADDR_BROADCAST_INITIALIZER;
	return qdf_is_macaddr_equal(mac_addr, &broadcast_mac_addr);
}

/**
 * qdf_copy_macaddr() - copy a QDF MacAddress
 * @dst_addr: pointer to the qdf MacAddress to copy TO (the destination)
 * @src_addr: pointer to the qdf MacAddress to copy FROM (the source)
 *
 * This function copies a QDF MacAddress into another QDF MacAddress.
 *
 * Return: none
 */
static inline void qdf_copy_macaddr(struct qdf_mac_addr *dst_addr,
				    struct qdf_mac_addr *src_addr)
{
	*dst_addr = *src_addr;
}

/**
 * qdf_set_macaddr_broadcast() - set a QDF MacAddress to the 'broadcast'
 * @mac_addr: pointer to the qdf MacAddress to set to broadcast
 *
 * This function sets a QDF MacAddress to the 'broadcast' MacAddress. Broadcast
 * MacAddress contains all 0xFF bytes.
 *
 * Return: none
 */
static inline void qdf_set_macaddr_broadcast(struct qdf_mac_addr *mac_addr)
{
	__qdf_set_macaddr_broadcast(mac_addr);
}

/**
 * qdf_set_u16() - Assign 16-bit unsigned value to a byte array base on CPU's
 * endianness.
 * @ptr: Starting address of a byte array
 * @value: The value to assign to the byte array
 *
 * Caller must validate the byte array has enough space to hold the vlaue
 *
 * Return: The address to the byte after the assignment. This may or may not
 * be valid. Caller to verify.
 */
static inline uint8_t *qdf_set_u16(uint8_t *ptr, uint16_t value)
{
#if defined(ANI_BIG_BYTE_ENDIAN)
	*(ptr) = (uint8_t) (value >> 8);
	*(ptr + 1) = (uint8_t) (value);
#else
	*(ptr + 1) = (uint8_t) (value >> 8);
	*(ptr) = (uint8_t) (value);
#endif
	return ptr + 2;
}

/**
 * qdf_get_u16() - Retrieve a 16-bit unsigned value from a byte array base on
 * CPU's endianness.
 * @ptr: Starting address of a byte array
 * @value: Pointer to a caller allocated buffer for 16 bit value. Value is to
 * assign to this location.
 *
 * Caller must validate the byte array has enough space to hold the vlaue
 *
 * Return: The address to the byte after the assignment. This may or may not
 * be valid. Caller to verify.
 */
static inline uint8_t *qdf_get_u16(uint8_t *ptr, uint16_t *value)
{
#if defined(ANI_BIG_BYTE_ENDIAN)
	*value = (((uint16_t) (*ptr << 8)) | ((uint16_t) (*(ptr + 1))));
#else
	*value = (((uint16_t) (*(ptr + 1) << 8)) | ((uint16_t) (*ptr)));
#endif
	return ptr + 2;
}

/**
 * qdf_get_u32() - retrieve a 32-bit unsigned value from a byte array base on
 * CPU's endianness.
 * @ptr: Starting address of a byte array
 * @value: Pointer to a caller allocated buffer for 32 bit value. Value is to
 * assign to this location.
 *
 * Caller must validate the byte array has enough space to hold the vlaue
 *
 * Return: The address to the byte after the assignment. This may or may not
 * be valid. Caller to verify.
 */
static inline uint8_t *qdf_get_u32(uint8_t *ptr, uint32_t *value)
{
#if defined(ANI_BIG_BYTE_ENDIAN)
	*value = ((uint32_t) (*(ptr) << 24) |
		   (uint32_t) (*(ptr + 1) << 16) |
		   (uint32_t) (*(ptr + 2) << 8) | (uint32_t) (*(ptr + 3)));
#else
	*value = ((uint32_t) (*(ptr + 3) << 24) |
		   (uint32_t) (*(ptr + 2) << 16) |
		   (uint32_t) (*(ptr + 1) << 8) | (uint32_t) (*(ptr)));
#endif
	return ptr + 4;
}

/**
 * qdf_ntohs - Convert a 16-bit value from network byte order to host byte order
 */
#define qdf_ntohs(x)                         __qdf_ntohs(x)

/**
 * qdf_ntohl - Convert a 32-bit value from network byte order to host byte order
 */
#define qdf_ntohl(x)                         __qdf_ntohl(x)

/**
 * qdf_htons - Convert a 16-bit value from host byte order to network byte order
 */
#define qdf_htons(x)                         __qdf_htons(x)

/**
 * qdf_htonl - Convert a 32-bit value from host byte order to network byte order
 */
#define qdf_htonl(x)                         __qdf_htonl(x)

/**
 * qdf_cpu_to_le16 - Convert a 16-bit value from CPU byte order to
 * little-endian byte order
 */
#define qdf_cpu_to_le16(x)                   __qdf_cpu_to_le16(x)

/**
 * qdf_cpu_to_le32 - Convert a 32-bit value from CPU byte order to
 * little-endian byte order
 */
#define qdf_cpu_to_le32(x)                   __qdf_cpu_to_le32(x)

/**
 * qdf_cpu_to_le64 - Convert a 64-bit value from CPU byte order to
 * little-endian byte order
 */
#define qdf_cpu_to_le64(x)                   __qdf_cpu_to_le64(x)

/**
 * qdf_be32_to_cpu - Convert a 32-bit value from big-endian byte order
 * to CPU byte order
 */
#define qdf_be32_to_cpu(x)                   __qdf_be32_to_cpu(x)

/**
 * qdf_be64_to_cpu - Convert a 64-bit value from big-endian byte order
 * to CPU byte order
 */
#define qdf_be64_to_cpu(x)                   __qdf_be64_to_cpu(x)

/**
 * qdf_le32_to_cpu - Convert a 32-bit value from little-endian byte
 * order to CPU byte order
 */
#define qdf_le32_to_cpu(x)                   __qdf_le32_to_cpu(x)

/**
 * qdf_le64_to_cpu - Convert a 64-bit value from little-endian byte
 * order to CPU byte order
 */
#define qdf_le64_to_cpu(x)                   __qdf_le64_to_cpu(x)

/**
 * qdf_le16_to_cpu - Convert a 16-bit value from little-endian byte order
 * to CPU byte order
 * @x: value to be converted
 */
#define qdf_le16_to_cpu(x)                   __qdf_le16_to_cpu(x)

/**
 * qdf_function - replace with the name of the current function
 */
#define qdf_function             __qdf_function

/**
 * qdf_get_pwr2() - get next power of 2 integer from input value
 * @value: input value to find next power of 2 integer
 *
 * Get next power of 2 integer from input value
 *
 * Return: Power of 2 integer
 */
static inline int qdf_get_pwr2(int value)
{
	int log2;
	if (QDF_IS_PWR2(value))
		return value;

	log2 = 0;
	while (value) {
		value >>= 1;
		log2++;
	}
	return 1 << log2;
}

#endif /*_QDF_UTIL_H*/