[Intel-wired-lan] [PATCH next-queue v3 2/3] igc: Enable PCIe PTM
Bjorn Helgaas
helgaas at kernel.org
Tue Mar 23 19:29:20 UTC 2021
On Mon, Mar 22, 2021 at 09:18:21AM -0700, Vinicius Costa Gomes wrote:
> In practice, enabling PTM also sets the enabled_ptm flag in the PCI
> device, the flag will be used for detecting if PTM is enabled before
> adding support for the SYSOFFSET_PRECISE ioctl() (which is added by
> implementing the getcrosststamp() PTP function).
I think you're referring to the "pci_dev.ptm_enabled" flag. I'm not
sure what the connection to this patch is. The SYSOFFSET_PRECISE
stuff also seems to belong with some other patch.
This patch merely enables PTM if it's supported (might be worth
expanding Precision Time Measurement for context).
> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes at intel.com>
> ---
> drivers/net/ethernet/intel/igc/igc_main.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
> index f77feadde8d2..04319ffae288 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"
> @@ -5792,6 +5794,10 @@ static int igc_probe(struct pci_dev *pdev,
>
> pci_enable_pcie_error_reporting(pdev);
>
> + err = pci_enable_ptm(pdev, NULL);
> + if (err < 0)
> + dev_err(&pdev->dev, "PTM not supported\n");
> +
> pci_set_master(pdev);
>
> err = -ENOMEM;
> --
> 2.31.0
>
More information about the Intel-wired-lan
mailing list