diff options
| author | Vinicius Costa Gomes <vinicius.gomes@intel.com> | 2021-07-27 05:36:56 +0200 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2021-08-24 20:49:21 +0200 |
| commit | 1b5d73fb862414106cf270a1a7300ce8ae77de83 (patch) | |
| tree | 92d7485f5943f8953cc1a72461b557b0f26e835e /drivers | |
| parent | PCI: Add pcie_ptm_enabled() (diff) | |
| download | linux-1b5d73fb862414106cf270a1a7300ce8ae77de83.tar.xz linux-1b5d73fb862414106cf270a1a7300ce8ae77de83.zip | |
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: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/intel/igc/igc_main.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index b7aab35c1132..db1c63e8802a 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -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; |