igb: adjust PTP timestamps for Tx/Rx latency
Table 7-62 on page 338 of the i210 datasheet lists TX and RX latencies
for the various speeds the chip supports. To give better PTP timestamp
accuracy, adjust the timestamps by the amounts Intel gives based on
current link speed.
Signed-off-by: Nathan Sullivan <nathan.sullivan@ni.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index 7a7bc31..b9609af 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -91,6 +91,14 @@
#define NVM_COMB_VER_OFF 0x0083
#define NVM_COMB_VER_PTR 0x003d
+/* Transmit and receive latency (for PTP timestamps) */
+#define IGB_I210_TX_LATENCY_10 9542
+#define IGB_I210_TX_LATENCY_100 1024
+#define IGB_I210_TX_LATENCY_1000 178
+#define IGB_I210_RX_LATENCY_10 20662
+#define IGB_I210_RX_LATENCY_100 2213
+#define IGB_I210_RX_LATENCY_1000 448
+
struct vf_data_storage {
unsigned char vf_mac_addresses[ETH_ALEN];
u16 vf_mc_hashes[IGB_MAX_VF_MC_ENTRIES];