Commit 1b5d73fb authored by Vinicius Costa Gomes's avatar Vinicius Costa Gomes Committed by Tony Nguyen
Browse files

igc: Enable PCIe PTM 



Enables PCIe PTM (Precision Time Measurement) support in the igc
driver. Notifies the PCI devices that PCIe PTM should be enabled.

PCIe PTM is similar protocol to PTP (Precision Time Protocol) running
in the PCIe fabric, it allows devices to report time measurements from
their internal clocks and the correlation with the PCIe root clock.

The i225 NIC exposes some registers that expose those time
measurements, those registers will be used, in later patches, to
implement the PTP_SYS_OFFSET_PRECISE ioctl().

Signed-off-by: default avatarVinicius Costa Gomes <vinicius.gomes@intel.com>
Tested-by: default avatarDvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: default avatarTony Nguyen <anthony.l.nguyen@intel.com>
parent 014408cd

drivers/net/ethernet/intel/igc/igc_main.c

+6 −0
Original line number Diff line number Diff line
@@ -12,6 +12,8 @@ 
#include <net/pkt_sched.h>

#include <linux/bpf_trace.h>

#include <net/xdp_sock_drv.h>

#include <linux/pci.h>



#include <net/ipv6.h>



#include "igc.h"
@@ -6174,6 +6176,10 @@ static int igc_probe(struct pci_dev *pdev, 


	pci_enable_pcie_error_reporting(pdev);



	err = pci_enable_ptm(pdev, NULL);

	if (err < 0)

		dev_info(&pdev->dev, "PCIe PTM not supported by PCIe bus/controller\n");



	pci_set_master(pdev);



	err = -ENOMEM;