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cxgb4: Fix misleading packet/frame count stats.

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Do not count pause frames as part of general TX/RX frame
counters.

Based on the original work of Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ganesh Goudar 2017-01-13 14:46:40 +05:30 committed by David S. Miller
parent 4b89aa3c16
commit f750e82e7f
2 changed files with 35 additions and 0 deletions
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18
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
View File

@ -5501,6 +5501,7 @@ void t4_get_port_stats_offset(struct adapter *adap, int idx,
void t4_get_port_stats(struct adapter *adap, int idx, struct port_stats *p)
{
u32 bgmap = t4_get_mps_bg_map(adap, idx);
u32 stat_ctl = t4_read_reg(adap, MPS_STAT_CTL_A);
#define GET_STAT(name) \
t4_read_reg64(adap, \
@ -5532,6 +5533,14 @@ void t4_get_port_stats(struct adapter *adap, int idx, struct port_stats *p)
p->tx_ppp6 = GET_STAT(TX_PORT_PPP6);
p->tx_ppp7 = GET_STAT(TX_PORT_PPP7);
if (CHELSIO_CHIP_VERSION(adap->params.chip) >= CHELSIO_T5) {
if (stat_ctl & COUNTPAUSESTATTX_F) {
p->tx_frames -= p->tx_pause;
p->tx_octets -= p->tx_pause * 64;
}
if (stat_ctl & COUNTPAUSEMCTX_F)
p->tx_mcast_frames -= p->tx_pause;
}
p->rx_octets = GET_STAT(RX_PORT_BYTES);
p->rx_frames = GET_STAT(RX_PORT_FRAMES);
p->rx_bcast_frames = GET_STAT(RX_PORT_BCAST);
@ -5560,6 +5569,15 @@ void t4_get_port_stats(struct adapter *adap, int idx, struct port_stats *p)
p->rx_ppp6 = GET_STAT(RX_PORT_PPP6);
p->rx_ppp7 = GET_STAT(RX_PORT_PPP7);
if (CHELSIO_CHIP_VERSION(adap->params.chip) >= CHELSIO_T5) {
if (stat_ctl & COUNTPAUSESTATRX_F) {
p->rx_frames -= p->rx_pause;
p->rx_octets -= p->rx_pause * 64;
}
if (stat_ctl & COUNTPAUSEMCRX_F)
p->rx_mcast_frames -= p->rx_pause;
}
p->rx_ovflow0 = (bgmap & 1) ? GET_STAT_COM(RX_BG_0_MAC_DROP_FRAME) : 0;
p->rx_ovflow1 = (bgmap & 2) ? GET_STAT_COM(RX_BG_1_MAC_DROP_FRAME) : 0;
p->rx_ovflow2 = (bgmap & 4) ? GET_STAT_COM(RX_BG_2_MAC_DROP_FRAME) : 0;

17
drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
View File

@ -1798,12 +1798,29 @@
#define MPS_CMN_CTL_A 0x9000
#define COUNTPAUSEMCRX_S 5
#define COUNTPAUSEMCRX_V(x) ((x) << COUNTPAUSEMCRX_S)
#define COUNTPAUSEMCRX_F COUNTPAUSEMCRX_V(1U)
#define COUNTPAUSESTATRX_S 4
#define COUNTPAUSESTATRX_V(x) ((x) << COUNTPAUSESTATRX_S)
#define COUNTPAUSESTATRX_F COUNTPAUSESTATRX_V(1U)
#define COUNTPAUSEMCTX_S 3
#define COUNTPAUSEMCTX_V(x) ((x) << COUNTPAUSEMCTX_S)
#define COUNTPAUSEMCTX_F COUNTPAUSEMCTX_V(1U)
#define COUNTPAUSESTATTX_S 2
#define COUNTPAUSESTATTX_V(x) ((x) << COUNTPAUSESTATTX_S)
#define COUNTPAUSESTATTX_F COUNTPAUSESTATTX_V(1U)
#define NUMPORTS_S 0
#define NUMPORTS_M 0x3U
#define NUMPORTS_G(x) (((x) >> NUMPORTS_S) & NUMPORTS_M)
#define MPS_INT_CAUSE_A 0x9008
#define MPS_TX_INT_CAUSE_A 0x9408
#define MPS_STAT_CTL_A 0x9600
#define FRMERR_S 15
#define FRMERR_V(x) ((x) << FRMERR_S)