linux-kernel - [PATCH net-next V3 2/3] net/mlx5: Add support for enabling PTM PCI capability

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Message-ID: <20240730134055.1835261-3-tariqt@nvidia.com>
Date: Tue, 30 Jul 2024 16:40:53 +0300
From: Tariq Toukan <tariqt@...dia.com>
To: "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>, Eric Dumazet <edumazet@...gle.com>
CC: <netdev@...r.kernel.org>, Saeed Mahameed <saeedm@...dia.com>, Gal Pressman
	<gal@...dia.com>, Leon Romanovsky <leonro@...dia.com>, John Stultz
	<jstultz@...gle.com>, Thomas Gleixner <tglx@...utronix.de>, "Anna-Maria
 Behnsen" <anna-maria@...utronix.de>, Frederic Weisbecker
	<frederic@...nel.org>, <linux-kernel@...r.kernel.org>, Bjorn Helgaas
	<bhelgaas@...gle.com>, <linux-pci@...r.kernel.org>, Ingo Molnar
	<mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen
	<dave.hansen@...ux.intel.com>, <x86@...nel.org>, Carolina Jubran
	<cjubran@...dia.com>, Bar Shapira <bshapira@...dia.com>, Rahul Rameshbabu
	<rrameshbabu@...dia.com>, Tariq Toukan <tariqt@...dia.com>
Subject: [PATCH net-next V3 2/3] net/mlx5: Add support for enabling PTM PCI capability

From: Carolina Jubran <cjubran@...dia.com>

Since the kernel doesn't support enabling Precision Time Measurement
for an endpoint device, enable the PTM PCI capability in the driver.

Signed-off-by: Carolina Jubran <cjubran@...dia.com>
Signed-off-by: Tariq Toukan <tariqt@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/main.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index 527da58c7953..780078bd5b8c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -923,6 +923,11 @@ static int mlx5_pci_init(struct mlx5_core_dev *dev, struct pci_dev *pdev,
 	}
 
 	mlx5_pci_vsc_init(dev);
+
+	err = pci_enable_ptm(pdev, NULL);
+	if (err)
+		mlx5_core_info(dev, "PTM is not supported by PCIe\n");
+
 	return 0;
 
 err_clr_master:
@@ -939,6 +944,7 @@ static void mlx5_pci_close(struct mlx5_core_dev *dev)
 	 * before removing the pci bars
 	 */
 	mlx5_drain_health_wq(dev);
+	pci_disable_ptm(dev->pdev);
 	iounmap(dev->iseg);
 	release_bar(dev->pdev);
 	mlx5_pci_disable_device(dev);
-- 
2.44.0