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From: Bjorn Helgaas <helgaas@kernel.org>
To: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Cc: intel-wired-lan@lists.osuosl.org, sasha.neftin@intel.com,
	anthony.l.nguyen@intel.com, linux-pci@vger.kernel.org,
	bhelgaas@google.com, netdev@vger.kernel.org, mlichvar@redhat.com,
	richardcochran@gmail.com
Subject: Re: [PATCH next-queue v3 2/3] igc: Enable PCIe PTM
Date: Tue, 23 Mar 2021 14:29:20 -0500	[thread overview]
Message-ID: <20210323192920.GA597326@bjorn-Precision-5520> (raw)
In-Reply-To: <20210322161822.1546454-3-vinicius.gomes@intel.com>

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@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
> 

WARNING: multiple messages have this Message-ID (diff)
From: Bjorn Helgaas <helgaas@kernel.org>
To: intel-wired-lan@osuosl.org
Subject: [Intel-wired-lan] [PATCH next-queue v3 2/3] igc: Enable PCIe PTM
Date: Tue, 23 Mar 2021 14:29:20 -0500	[thread overview]
Message-ID: <20210323192920.GA597326@bjorn-Precision-5520> (raw)
In-Reply-To: <20210322161822.1546454-3-vinicius.gomes@intel.com>

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@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
> 

  reply	other threads:[~2021-03-23 19:30 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-22 16:18 [PATCH next-queue v3 0/3] igc: Add support for PCIe PTM Vinicius Costa Gomes
2021-03-22 16:18 ` [Intel-wired-lan] " Vinicius Costa Gomes
2021-03-22 16:18 ` [PATCH next-queue v3 1/3] Revert "PCI: Make pci_enable_ptm() private" Vinicius Costa Gomes
2021-03-22 16:18   ` [Intel-wired-lan] " Vinicius Costa Gomes
2021-03-23 16:01   ` Christoph Hellwig
2021-03-23 16:01     ` [Intel-wired-lan] " Christoph Hellwig
2021-03-23 18:40     ` Vinicius Costa Gomes
2021-03-23 18:40       ` [Intel-wired-lan] " Vinicius Costa Gomes
2021-03-23 18:45       ` Christoph Hellwig
2021-03-23 18:45         ` [Intel-wired-lan] " Christoph Hellwig
2021-03-23 19:40   ` Bjorn Helgaas
2021-03-23 19:40     ` [Intel-wired-lan] " Bjorn Helgaas
2021-03-23 22:49     ` Vinicius Costa Gomes
2021-03-23 22:49       ` [Intel-wired-lan] " Vinicius Costa Gomes
2021-03-22 16:18 ` [PATCH next-queue v3 2/3] igc: Enable PCIe PTM Vinicius Costa Gomes
2021-03-22 16:18   ` [Intel-wired-lan] " Vinicius Costa Gomes
2021-03-23 19:29   ` Bjorn Helgaas [this message]
2021-03-23 19:29     ` Bjorn Helgaas
2021-03-23 19:40     ` Vinicius Costa Gomes
2021-03-23 19:40       ` [Intel-wired-lan] " Vinicius Costa Gomes
2021-03-22 16:18 ` [PATCH next-queue v3 3/3] igc: Add support for PTP getcrosststamp() Vinicius Costa Gomes
2021-03-22 16:18   ` [Intel-wired-lan] " Vinicius Costa Gomes
2021-03-23 19:39   ` Bjorn Helgaas
2021-03-23 19:39     ` [Intel-wired-lan] " Bjorn Helgaas
2021-03-23 21:37     ` Vinicius Costa Gomes
2021-03-23 21:37       ` [Intel-wired-lan] " Vinicius Costa Gomes

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