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net/mlx4_en: Add HW timestamping (TS) support

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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 <eugenia@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amir Vadai
2013-04-23 06:06:49 +00:00
committed by David S. Miller
parent ddd8a6c12d
commit ec693d4701
15 changed files with 375 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/mlx4/cq.h
+16
View File
@@ -64,6 +64,22 @@ struct mlx4_err_cqe {
u8 owner_sr_opcode;
};
struct mlx4_ts_cqe {
__be32 vlan_my_qpn;
__be32 immed_rss_invalid;
__be32 g_mlpath_rqpn;
__be32 timestamp_hi;
__be16 status;
u8 ipv6_ext_mask;
u8 badfcs_enc;
__be32 byte_cnt;
__be16 wqe_index;
__be16 checksum;
u8 reserved;
__be16 timestamp_lo;
u8 owner_sr_opcode;
} __packed;
enum {
MLX4_CQE_VLAN_PRESENT_MASK = 1 << 29,
MLX4_CQE_QPN_MASK = 0xffffff,
include/linux/mlx4/device.h
+5 -1
View File
@@ -40,6 +40,8 @@
#include <linux/atomic.h>
#include <linux/clocksource.h>
#define MAX_MSIX_P_PORT 17
#define MAX_MSIX 64
#define MSIX_LEGACY_SZ 4
@@ -840,7 +842,7 @@ void mlx4_free_hwq_res(struct mlx4_dev *mdev, struct mlx4_hwq_resources *wqres,
int mlx4_cq_alloc(struct mlx4_dev *dev, int nent, struct mlx4_mtt *mtt,
struct mlx4_uar *uar, u64 db_rec, struct mlx4_cq *cq,
unsigned vector, int collapsed);
unsigned vector, int collapsed, int timestamp_en);
void mlx4_cq_free(struct mlx4_dev *dev, struct mlx4_cq *cq);
int mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align, int *base);
@@ -1031,4 +1033,6 @@ int set_and_calc_slave_port_state(struct mlx4_dev *dev, int slave, u8 port, int
void mlx4_put_slave_node_guid(struct mlx4_dev *dev, int slave, __be64 guid);
__be64 mlx4_get_slave_node_guid(struct mlx4_dev *dev, int slave);
cycle_t mlx4_read_clock(struct mlx4_dev *dev);
#endif /* MLX4_DEVICE_H */