From ec693d47010e8302e61e0bdf3f47496c5610641a Mon Sep 17 00:00:00 2001 From: Amir Vadai Date: Tue, 23 Apr 2013 06:06:49 +0000 Subject: net/mlx4_en: Add HW timestamping (TS) support The patch allows to enable/disable HW timestamping for incoming and/or outgoing packets. It adds and initializes all structs and callbacks needed by kernel TS API. To enable/disable HW timestamping appropriate ioctl should be used. Currently HWTSTAMP_FILTER_ALL/NONE and HWTSAMP_TX_ON/OFF only are supported. When enabling TS on receive flow - VLAN stripping will be disabled. Also were made all relevant changes in RX/TX flows to consider TS request and plant HW timestamps into relevant structures. mlx4_ib was fixed to compile with new mlx4_cq_alloc() signature. Signed-off-by: Eugenia Emantayev Signed-off-by: Amir Vadai Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx4/main.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'drivers/net/ethernet/mellanox/mlx4/main.c') diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index e81840faa6c..0d32a82458b 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -1228,6 +1228,28 @@ static void unmap_bf_area(struct mlx4_dev *dev) io_mapping_free(mlx4_priv(dev)->bf_mapping); } +cycle_t mlx4_read_clock(struct mlx4_dev *dev) +{ + u32 clockhi, clocklo, clockhi1; + cycle_t cycles; + int i; + struct mlx4_priv *priv = mlx4_priv(dev); + + for (i = 0; i < 10; i++) { + clockhi = swab32(readl(priv->clock_mapping)); + clocklo = swab32(readl(priv->clock_mapping + 4)); + clockhi1 = swab32(readl(priv->clock_mapping)); + if (clockhi == clockhi1) + break; + } + + cycles = (u64) clockhi << 32 | (u64) clocklo; + + return cycles; +} +EXPORT_SYMBOL_GPL(mlx4_read_clock); + + static int map_internal_clock(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); -- cgit v1.2.3