/*
 * Copyright (c) 2014-2019 The Linux Foundation. All rights reserved.
 *
 * 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.
 */

/**
 * DOC: i_qdf_util.h
 * This file provides OS dependent API's.
 */

#ifndef _I_QDF_UTIL_H
#define _I_QDF_UTIL_H

#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/average.h>

#include <linux/random.h>
#include <linux/io.h>

#include <qdf_types.h>
#include <asm/byteorder.h>

#if LINUX_VERSION_CODE  <= KERNEL_VERSION(3, 3, 8)
#include <asm/system.h>
#else
#if defined(__LINUX_MIPS32_ARCH__) || defined(__LINUX_MIPS64_ARCH__)
#include <asm/dec/system.h>
#else
#endif
#endif

#include <qdf_types.h>
#include <linux/io.h>
#include <asm/byteorder.h>

#ifdef QCA_PARTNER_PLATFORM
#include "ath_carr_pltfrm.h"
#else
#include <linux/byteorder/generic.h>
#endif

typedef wait_queue_head_t __qdf_wait_queue_head_t;

/* Generic compiler-dependent macros if defined by the OS */
#define __qdf_wait_queue_interruptible(wait_queue, condition) \
	wait_event_interruptible(wait_queue, condition)

#define __qdf_wait_queue_timeout(wait_queue, condition, timeout) \
	wait_event_timeout(wait_queue, condition, timeout)


#define __qdf_init_waitqueue_head(_q) init_waitqueue_head(_q)

#define __qdf_wake_up_interruptible(_q) wake_up_interruptible(_q)

#define __qdf_wake_up(_q) wake_up(_q)

#define __qdf_wake_up_completion(_q) wake_up_completion(_q)

#define __qdf_unlikely(_expr)   unlikely(_expr)
#define __qdf_likely(_expr)     likely(_expr)

/**
 * __qdf_set_bit() - set bit in address
 * @nr: bit number to be set
 * @addr: address buffer pointer
 *
 * Return: none
 */
static inline void __qdf_set_bit(unsigned int nr, unsigned long *addr)
{
	__set_bit(nr, addr);
}

static inline void __qdf_clear_bit(unsigned int nr, unsigned long *addr)
{
	__clear_bit(nr, addr);
}

static inline bool __qdf_test_bit(unsigned int nr, unsigned long *addr)
{
	return test_bit(nr, addr);
}

static inline bool __qdf_test_and_clear_bit(unsigned int nr,
					unsigned long *addr)
{
	return __test_and_clear_bit(nr, addr);
}

static inline unsigned long __qdf_find_first_bit(unsigned long *addr,
					unsigned long nbits)
{
	return find_first_bit(addr, nbits);
}

/**
 * __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)
{
	memset(mac_addr, 0xff, QDF_MAC_ADDR_SIZE);
}

/**
 * __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)
{
	memset(mac_addr, 0, QDF_MAC_ADDR_SIZE);
}

/**
 * __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 0 == memcmp(mac_addr1, mac_addr2, QDF_MAC_ADDR_SIZE);
}

/**
 * qdf_in_interrupt - returns true if in interrupt context
 */
#define qdf_in_interrupt          in_interrupt

#define __qdf_min(_a, _b) min(_a, _b)
#define __qdf_max(_a, _b) max(_a, _b)

/**
 * Setting it to blank as feature is not intended to be supported
 * on linux version less than 4.3
 */
#if LINUX_VERSION_CODE  < KERNEL_VERSION(4, 3, 0) || \
	LINUX_VERSION_CODE  >= KERNEL_VERSION(4, 11, 0)
#define __QDF_DECLARE_EWMA(name, _factor, _weight)

#define __qdf_ewma_tx_lag int
#define __qdf_ewma_rx_rssi int
#else
#define __QDF_DECLARE_EWMA(name, _factor, _weight) \
	DECLARE_EWMA(name, _factor, _weight)

#define __qdf_ewma_tx_lag struct ewma_tx_lag
#define __qdf_ewma_rx_rssi struct ewma_rx_rssi
#endif

#define __qdf_ffz(mask) (~(mask) == 0 ? -1 : ffz(mask))

#define MEMINFO_KB(x)  ((x) << (PAGE_SHIFT - 10))   /* In kilobytes */

/**
 * @brief Assert
 */
#define __qdf_assert(expr)  do { \
		if (unlikely(!(expr))) { \
			pr_err("Assertion failed! %s:%s %s:%d\n", \
			       # expr, __func__, __FILE__, __LINE__); \
			dump_stack(); \
			QDF_BUG(0); \
		} \
} while (0)

/**
 * @brief Assert
 */
#define __qdf_target_assert(expr)  do {    \
	if (unlikely(!(expr))) {                                 \
		qdf_err("Assertion failed! %s:%s %s:%d",   \
		#expr, __FUNCTION__, __FILE__, __LINE__);      \
		dump_stack();                                      \
		panic("Take care of the TARGET ASSERT first\n");          \
	}     \
} while (0)

/**
 * @brief Compile time Assert
 */
#define QDF_COMPILE_TIME_ASSERT(assertion_name, predicate) \
    typedef char assertion_name[(predicate) ? 1 : -1]

#define __qdf_container_of(ptr, type, member) container_of(ptr, type, member)

#define __qdf_ntohs                      ntohs
#define __qdf_ntohl                      ntohl

#define __qdf_htons                      htons
#define __qdf_htonl                      htonl

#define __qdf_cpu_to_le16 cpu_to_le16
#define __qdf_cpu_to_le32 cpu_to_le32
#define __qdf_cpu_to_le64 cpu_to_le64

#define __qdf_le16_to_cpu le16_to_cpu
#define __qdf_le32_to_cpu le32_to_cpu
#define __qdf_le64_to_cpu le64_to_cpu

#define __qdf_cpu_to_be16 cpu_to_be16
#define __qdf_cpu_to_be32 cpu_to_be32
#define __qdf_cpu_to_be64 cpu_to_be64

#define __qdf_be16_to_cpu be16_to_cpu
#define __qdf_be32_to_cpu be32_to_cpu
#define __qdf_be64_to_cpu be64_to_cpu

/**
 * @brief memory barriers.
 */
#define __qdf_wmb()                wmb()
#define __qdf_rmb()                rmb()
#define __qdf_mb()                 mb()
#define __qdf_ioread32(offset)             ioread32(offset)
#define __qdf_iowrite32(offset, value)     iowrite32(value, offset)

#define __qdf_roundup(x, y) roundup(x, y)

#if LINUX_VERSION_CODE  < KERNEL_VERSION(4, 3, 0) || \
	LINUX_VERSION_CODE  >= KERNEL_VERSION(4, 11, 0)
#define  __qdf_ewma_tx_lag_init(tx_lag)
#define  __qdf_ewma_tx_lag_add(tx_lag, value)
#define  __qdf_ewma_tx_lag_read(tx_lag)

#define  __qdf_ewma_rx_rssi_init(rx_rssi)
#define  __qdf_ewma_rx_rssi_add(rx_rssi, value)
#define  __qdf_ewma_rx_rssi_read(rx_rssi)
#else
#define  __qdf_ewma_tx_lag_init(tx_lag) \
	ewma_tx_lag_init(tx_lag)

#define  __qdf_ewma_tx_lag_add(tx_lag, value) \
	ewma_tx_lag_add(tx_lag, value)

#define  __qdf_ewma_tx_lag_read(tx_lag) \
	ewma_tx_lag_read(tx_lag)

#define  __qdf_ewma_rx_rssi_init(rx_rssi) \
	ewma_rx_rssi_init(rx_rssi)

#define  __qdf_ewma_rx_rssi_add(rx_rssi, value) \
	ewma_rx_rssi_add(rx_rssi, value)

#define  __qdf_ewma_rx_rssi_read(rx_rssi) \
	ewma_rx_rssi_read(rx_rssi)
#endif

#ifdef QCA_CONFIG_SMP
/**
 * __qdf_get_cpu() - get cpu_index
 *
 * Return: cpu_index
 */
static inline
int __qdf_get_cpu(void)
{
	int cpu_index = get_cpu();

	put_cpu();
	return cpu_index;
}
#else
static inline
int __qdf_get_cpu(void)
{
	return 0;
}
#endif

static inline int __qdf_device_init_wakeup(__qdf_device_t qdf_dev, bool enable)
{
	return device_init_wakeup(qdf_dev->dev, enable);
}

/**
 * __qdf_get_totalramsize() -  Get total ram size in Kb
 *
 * Return: Total ram size in Kb
 */
static inline uint64_t
__qdf_get_totalramsize(void)
{
	struct sysinfo meminfo;

	si_meminfo(&meminfo);
	return MEMINFO_KB(meminfo.totalram);
}

/**
 * __qdf_get_lower_32_bits() - get lower 32 bits from an address.
 * @addr: address
 *
 * This api returns the lower 32 bits of an address.
 *
 * Return: lower 32 bits.
 */
static inline
uint32_t __qdf_get_lower_32_bits(__qdf_dma_addr_t addr)
{
	return lower_32_bits(addr);
}

/**
 * __qdf_get_upper_32_bits() - get upper 32 bits from an address.
 * @addr: address
 *
 * This api returns the upper 32 bits of an address.
 *
 * Return: upper 32 bits.
 */
static inline
uint32_t __qdf_get_upper_32_bits(__qdf_dma_addr_t addr)
{
	return upper_32_bits(addr);
}

/**
 * __qdf_rounddown_pow_of_two() - Round down to nearest power of two
 * @n: number to be tested
 *
 * Test if the input number is power of two, and return the nearest power of two
 *
 * Return: number rounded down to the nearest power of two
 */
static inline
unsigned long __qdf_rounddown_pow_of_two(unsigned long n)
{
	if (is_power_of_2(n))
		return n; /* already a power of 2 */

	return __rounddown_pow_of_two(n);
}

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)

/**
 * __qdf_set_dma_coherent_mask() - set max number of bits allowed in dma addr
 * @dev: device pointer
 * @addr_bits: max number of bits allowed in dma address
 *
 * This API sets the maximum allowed number of bits in the dma address.
 *
 * Return: 0 - success, non zero - failure
 */
static inline
int __qdf_set_dma_coherent_mask(struct device *dev, uint8_t addr_bits)
{
	return dma_set_mask_and_coherent(dev, DMA_BIT_MASK(addr_bits));
}

#else

/**
 * __qdf_set_dma_coherent_mask() - set max number of bits allowed in dma addr
 * @dev: device pointer
 * @addr_bits: max number of bits allowed in dma address
 *
 * This API sets the maximum allowed number of bits in the dma address.
 *
 * Return: 0 - success, non zero - failure
 */
static inline
int __qdf_set_dma_coherent_mask(struct device *dev, uint8_t addr_bits)
{
	return dma_set_coherent_mask(dev, DMA_BIT_MASK(addr_bits));
}
#endif
/**
 * qdf_get_random_bytes() - returns nbytes bytes of random
 * data
 *
 * Return: random bytes of data
 */
static inline
void __qdf_get_random_bytes(void *buf, int nbytes)
{
	return get_random_bytes(buf, nbytes);
}

/**
 * __qdf_do_div() - wrapper function for kernel macro(do_div).
 * @dividend: Dividend value
 * @divisor : Divisor value
 *
 * Return: Quotient
 */
static inline
uint64_t __qdf_do_div(uint64_t dividend, uint32_t divisor)
{
	do_div(dividend, divisor);
	/*do_div macro updates dividend with Quotient of dividend/divisor */
	return dividend;
}

/**
 * __qdf_do_div_rem() - wrapper function for kernel macro(do_div)
 *                      to get remainder.
 * @dividend: Dividend value
 * @divisor : Divisor value
 *
 * Return: remainder
 */
static inline
uint64_t __qdf_do_div_rem(uint64_t dividend, uint32_t divisor)
{
	return do_div(dividend, divisor);
}

/**
 * __qdf_hex_to_bin() - Wrapper function to kernel API to get unsigned
 * integer from hexa decimal ASCII character.
 * @ch: hexa decimal ASCII character
 *
 * Return: For hexa decimal ASCII char return actual decimal value
 *	   else -1 for bad input.
 */
static inline
int __qdf_hex_to_bin(char ch)
{
	return hex_to_bin(ch);
}

/**
 * __qdf_hex_str_to_binary() - Wrapper function to get array of unsigned
 * integers from string of hexa decimal ASCII characters.
 * @dst: output array to hold converted values
 * @src: input string of hexa decimal ASCII characters
 * @count: size of dst string
 *
 * Return: For a string of hexa decimal ASCII characters return 0
 *	   else -1 for bad input.
 */
static inline
int __qdf_hex_str_to_binary(u8 *dst, const char *src, size_t count)
{
	return hex2bin(dst, src, count);
}

#endif /*_I_QDF_UTIL_H*/