From: Vinicius Costa Gomes vinicius.gomes@intel.com
[ Upstream commit f03369b9bfab8e23ac28ca7ab7e6631c374b7cbe ]
The previous timestamping latency numbers were obtained by interpolating the i210 numbers with the i225 crystal clock value. That calculation was wrong.
Use the correct values from real measurements.
Fixes: 81b055205e8b ("igc: Add support for RX timestamping") Signed-off-by: Vinicius Costa Gomes vinicius.gomes@intel.com Tested-by: Aaron Brown aaron.f.brown@intel.com Signed-off-by: Tony Nguyen anthony.l.nguyen@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/intel/igc/igc.h | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h index 5dbc5a156626a..206b73aa6d7a7 100644 --- a/drivers/net/ethernet/intel/igc/igc.h +++ b/drivers/net/ethernet/intel/igc/igc.h @@ -298,18 +298,14 @@ extern char igc_driver_version[]; #define IGC_RX_HDR_LEN IGC_RXBUFFER_256
/* Transmit and receive latency (for PTP timestamps) */ -/* FIXME: These values were estimated using the ones that i225 has as - * basis, they seem to provide good numbers with ptp4l/phc2sys, but we - * need to confirm them. - */ -#define IGC_I225_TX_LATENCY_10 9542 -#define IGC_I225_TX_LATENCY_100 1024 -#define IGC_I225_TX_LATENCY_1000 178 -#define IGC_I225_TX_LATENCY_2500 64 -#define IGC_I225_RX_LATENCY_10 20662 -#define IGC_I225_RX_LATENCY_100 2213 -#define IGC_I225_RX_LATENCY_1000 448 -#define IGC_I225_RX_LATENCY_2500 160 +#define IGC_I225_TX_LATENCY_10 240 +#define IGC_I225_TX_LATENCY_100 58 +#define IGC_I225_TX_LATENCY_1000 80 +#define IGC_I225_TX_LATENCY_2500 1325 +#define IGC_I225_RX_LATENCY_10 6450 +#define IGC_I225_RX_LATENCY_100 185 +#define IGC_I225_RX_LATENCY_1000 300 +#define IGC_I225_RX_LATENCY_2500 1485
/* RX and TX descriptor control thresholds. * PTHRESH - MAC will consider prefetch if it has fewer than this number of