From: Tony Nguyen <anthony.l.nguyen@intel.com>
To: davem@davemloft.net, kuba@kernel.org
Cc: Vinicius Costa Gomes <vinicius.gomes@intel.com>,
netdev@vger.kernel.org, anthony.l.nguyen@intel.com,
bhelgaas@google.com, linux-pci@vger.kernel.org,
sasha.neftin@intel.com, vitaly.lifshits@intel.com,
richardcochran@gmail.com,
Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Subject: [PATCH net-next 3/4] igc: Enable PCIe PTM
Date: Tue, 24 Aug 2021 13:42:47 -0700 [thread overview]
Message-ID: <20210824204248.2957134-4-anthony.l.nguyen@intel.com> (raw)
In-Reply-To: <20210824204248.2957134-1-anthony.l.nguyen@intel.com>
From: Vinicius Costa Gomes <vinicius.gomes@intel.com>
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>
---
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 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;
--
2.26.2
next prev parent reply other threads:[~2021-08-24 20:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-24 20:42 [PATCH net-next 0/4][pull request] 1GbE Intel Wired LAN Driver Updates 2021-08-24 Tony Nguyen
2021-08-24 20:42 ` [PATCH net-next 1/4] Revert "PCI: Make pci_enable_ptm() private" Tony Nguyen
2021-08-24 20:42 ` [PATCH net-next 2/4] PCI: Add pcie_ptm_enabled() Tony Nguyen
2021-08-24 20:42 ` Tony Nguyen [this message]
2021-08-24 20:42 ` [PATCH net-next 4/4] igc: Add support for PTP getcrosststamp() Tony Nguyen
2021-08-25 10:00 ` [PATCH net-next 0/4][pull request] 1GbE Intel Wired LAN Driver Updates 2021-08-24 patchwork-bot+netdevbpf
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