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Commit 6d6e996c authored by Majd Dibbiny's avatar Majd Dibbiny Committed by David S. Miller
Browse files

net/mlx4_core: Update the HCA core clock frequency after INIT_PORT 



The firmware might change the hca core clock frequency after the driver
issues the INIT_PORT command. Therefore we need to query the new
value again and save in to the cached dev caps.

Fixes: ddd8a6c1 ('net/mlx4_core: Read HCA frequency and map internal clock')
Signed-off-by: default avatarMajd Dibbiny <majd@mellanox.com>
Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarAmir Vadai <amirv@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent cb2147a9

drivers/net/ethernet/mellanox/mlx4/fw.c

+33 −0
Original line number Diff line number Diff line
@@ -1897,6 +1897,36 @@ int mlx4_QUERY_HCA(struct mlx4_dev *dev, 
	return err;

}



static int mlx4_hca_core_clock_update(struct mlx4_dev *dev)

{

	struct mlx4_cmd_mailbox *mailbox;

	__be32 *outbox;

	int err;



	mailbox = mlx4_alloc_cmd_mailbox(dev);

	if (IS_ERR(mailbox)) {

		mlx4_warn(dev, "hca_core_clock mailbox allocation failed\n");

		return PTR_ERR(mailbox);

	}

	outbox = mailbox->buf;



	err = mlx4_cmd_box(dev, 0, mailbox->dma, 0, 0,

			   MLX4_CMD_QUERY_HCA,

			   MLX4_CMD_TIME_CLASS_B,

			   !mlx4_is_slave(dev));

	if (err) {

		mlx4_warn(dev, "hca_core_clock update failed\n");

		goto out;

	}



	MLX4_GET(dev->caps.hca_core_clock, outbox, QUERY_HCA_CORE_CLOCK_OFFSET);



out:

	mlx4_free_cmd_mailbox(dev, mailbox);



	return err;

}



/* for IB-type ports only in SRIOV mode. Checks that both proxy QP0

 * and real QP0 are active, so that the paravirtualized QP0 is ready

 * to operate */
@@ -2001,6 +2031,9 @@ int mlx4_INIT_PORT(struct mlx4_dev *dev, int port) 
		err = mlx4_cmd(dev, 0, port, 0, MLX4_CMD_INIT_PORT,

			       MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);



	if (!err)

		mlx4_hca_core_clock_update(dev);



	return err;

}

EXPORT_SYMBOL_GPL(mlx4_INIT_PORT);