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| author | Dmitry Kravkov <dmitry@broadcom.com> | 2011-02-28 03:37:11 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-02-28 13:14:48 -0800 |
| commit | ff80ee029b562c21ca40724dfe9a63e0e0e0ce3d (patch) | |
| tree | cc095874efffffd284b4002bba2e7b6f6f11a08a /drivers/net/bnx2x/bnx2x.h | |
| parent | 633ac3637a1ff84eb85d5659380a41d96c4fdbae (diff) | |
| download | linux-3.10-ff80ee029b562c21ca40724dfe9a63e0e0e0ce3d.tar.gz linux-3.10-ff80ee029b562c21ca40724dfe9a63e0e0e0ce3d.tar.bz2 linux-3.10-ff80ee029b562c21ca40724dfe9a63e0e0e0ce3d.zip | |
bnx2x: properly configure coefficients for MinBW algorithm (NPAR mode).
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bnx2x/bnx2x.h')
| -rw-r--r-- | drivers/net/bnx2x/bnx2x.h | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/drivers/net/bnx2x/bnx2x.h b/drivers/net/bnx2x/bnx2x.h index 653c62475cb..368cfcd0a21 100644 --- a/drivers/net/bnx2x/bnx2x.h +++ b/drivers/net/bnx2x/bnx2x.h @@ -1613,19 +1613,23 @@ static inline u32 reg_poll(struct bnx2x *bp, u32 reg, u32 expected, int ms, #define BNX2X_BTR 4 #define MAX_SPQ_PENDING 8 - -/* CMNG constants - derived from lab experiments, and not from system spec calculations !!! */ -#define DEF_MIN_RATE 100 +/* CMNG constants, as derived from system spec calculations */ +/* default MIN rate in case VNIC min rate is configured to zero - 100Mbps */ +#define DEF_MIN_RATE 100 /* resolution of the rate shaping timer - 100 usec */ -#define RS_PERIODIC_TIMEOUT_USEC 100 -/* resolution of fairness algorithm in usecs - - coefficient for calculating the actual t fair */ -#define T_FAIR_COEF 10000000 +#define RS_PERIODIC_TIMEOUT_USEC 100 /* number of bytes in single QM arbitration cycle - - coefficient for calculating the fairness timer */ -#define QM_ARB_BYTES 40000 -#define FAIR_MEM 2 + * coefficient for calculating the fairness timer */ +#define QM_ARB_BYTES 160000 +/* resolution of Min algorithm 1:100 */ +#define MIN_RES 100 +/* how many bytes above threshold for the minimal credit of Min algorithm*/ +#define MIN_ABOVE_THRESH 32768 +/* Fairness algorithm integration time coefficient - + * for calculating the actual Tfair */ +#define T_FAIR_COEF ((MIN_ABOVE_THRESH + QM_ARB_BYTES) * 8 * MIN_RES) +/* Memory of fairness algorithm . 2 cycles */ +#define FAIR_MEM 2 #define ATTN_NIG_FOR_FUNC (1L << 8) |