/* bnx2x_stats.c: Broadcom Everest network driver.
*
* Copyright (c) 2007-2010 Broadcom Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
*
* Maintained by: Eilon Greenstein <eilong@broadcom.com>
* Written by: Eliezer Tamir
* Based on code from Michael Chan's bnx2 driver
* UDP CSUM errata workaround by Arik Gendelman
* Slowpath and fastpath rework by Vladislav Zolotarov
* Statistics and Link management by Yitchak Gertner
*
*/
#include "bnx2x_cmn.h"
#include "bnx2x_stats.h"
/* Statistics */
/****************************************************************************
* Macros
****************************************************************************/
/* sum[hi:lo] += add[hi:lo] */
#define ADD_64(s_hi, a_hi, s_lo, a_lo) \
do { \
s_lo += a_lo; \
s_hi += a_hi + ((s_lo < a_lo) ? 1 : 0); \
} while (0)
/* difference = minuend - subtrahend */
#define DIFF_64(d_hi, m_hi, s_hi, d_lo, m_lo, s_lo) \
do { \
if (m_lo < s_lo) { \
/* underflow */ \
d_hi = m_hi - s_hi; \
if (d_hi > 0) { \
/* we can 'loan' 1 */ \
d_hi--; \
d_lo = m_lo + (UINT_MAX - s_lo) + 1; \
} else { \
/* m_hi <= s_hi */ \
d_hi = 0; \
d_lo = 0; \
} \
} else { \
/* m_lo >= s_lo */ \
if (m_hi < s_hi) { \
d_hi = 0; \
d_lo = 0; \
} else { \
/* m_hi >= s_hi */ \
d_hi = m_hi - s_hi; \
d_lo = m_lo - s_lo; \
} \
} \
} while (0)
#define UPDATE_STAT64(s, t) \
do { \
DIFF_64(diff.hi, new->s##_hi, pstats->mac_stx[0].t##_hi, \
diff.lo, new->s##_lo, pstats->mac_stx[0].t##_lo); \
pstats->mac_stx[0].t##_hi = new->s##_hi; \
pstats->mac_stx[0].t##_lo = new->s##_lo; \
ADD_64(pstats->mac_stx[1].t##_hi, diff.hi, \
pstats->mac_stx[1].t##_lo, diff.lo); \
} while (0)
#define UPDATE_STAT64_NIG(s, t) \
do { \
DIFF_64(diff.hi, new->s##_hi, old->s##_hi, \
diff.lo, new->s##_lo, old->s##_lo); \
ADD_64(estats->t##_hi, diff.hi, \
estats->t##_lo, diff.lo); \
} while (0)
/* sum[hi:lo] += add */
#define ADD_EXTEND_64(s_hi, s_lo, a) \
do { \
s_lo += a; \
s_hi += (s_lo < a) ? 1 : 0; \
} while (0)
#define UPDATE_EXTEND_STAT(s) \
do { \
ADD_EXTEND_64(pstats->mac_stx[1].s##_hi, \
pstats->mac_stx[1].s##_lo, \
new->s); \
} while (0)
#define UPDATE_EXTEND_TSTAT(s, t) \
do { \
diff = le32_to_cpu(tclient->s) - le32_to_cpu(old_tclient->s); \
old_tclient->s = tclient->s; \
ADD_EXTEND_64(qstats->t##_hi, qstats->t##_lo, diff); \
} while (0)
#define UPDATE_EXTEND_USTAT(s, t) \
do { \
diff = le32_to_cpu(uclient->s) - le32_to_cpu(old_uclient->s); \
old_uclient->s = uclient->s; \
ADD_EXTEND_64(qstats->t##_hi, qstats->t##_lo, diff); \
} while (0)
#define UPDATE_EXTEND_XSTAT(s, t) \
do { \
diff = le32_to_cpu(xclient->s) - le32_to_cpu(old_xclient->s); \
old_xclient->s = xclient->s; \
ADD_EXTEND_64(qstats->t##_hi, qstats->t##_lo, diff); \
} while (0)
/* minuend -= subtrahend */
#define SUB_64(m_hi, s_hi, m_lo, s_lo) \
do { \
DIFF_64(m_hi, m_hi, s_hi, m_lo, m_lo, s_lo); \
} while (0)
/* minuend[hi:lo] -= subtrahend */
#define SUB_EXTEND_64(m_hi, m_lo, s) \
do { \
SUB_64(m_hi, 0, m_lo, s); \
} while (0)
#define SUB_EXTEND_USTAT(s, t) \
do { \
diff = le32_to_cpu(uclient->s) - le32_to_cpu(old_uclient->s); \
SUB_EXTEND_64(qstats->t##_hi, qstats->t##_lo, diff); \
} while (0)
/*
* General service functions
*/
static inline long bnx2x_hilo(u32 *hiref)
{
u32 lo = *(hiref +