Commit aa98487c authored by Danielle Ratson's avatar Danielle Ratson Committed by David S. Miller
Browse files

mlxsw: pci_hw: Add 'time_stamp' and 'time_stamp_type' fields to CQEv2 



The Completion Queue Element version 2 (CQEv2) includes various metadata
fields of packets.

Add 'time_stamp' and 'time_stamp_type' fields along with functions to
extract the seconds and nanoseconds for a future use.

Signed-off-by: default avatarDanielle Ratson <danieller@nvidia.com>
Reviewed-by: default avatarPetr Machata <petrm@nvidia.com>
Signed-off-by: default avatarAmit Cohen <amcohen@nvidia.com>
Signed-off-by: default avatarIdo Schimmel <idosch@nvidia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 731416e9

drivers/net/ethernet/mellanox/mlxsw/pci_hw.h

+78 −0
Original line number Diff line number Diff line
@@ -217,6 +217,25 @@ MLXSW_ITEM32(pci, cqe0, dqn, 0x0C, 1, 5); 
MLXSW_ITEM32(pci, cqe12, dqn, 0x0C, 1, 6);

mlxsw_pci_cqe_item_helpers(dqn, 0, 12, 12);



/* pci_cqe_time_stamp_low

 * Time stamp of the CQE

 * Format according to time_stamp_type:

 * 0: uSec - 1.024uSec (default for devices which do not support

 * time_stamp_type). Only bits 15:0 are valid

 * 1: FRC - Free Running Clock - units of 1nSec

 * 2: UTC - time_stamp[37:30] = Sec

 *	  - time_stamp[29:0] = nSec

 * 3: Mirror_UTC. UTC time stamp of the original packet that has

 * MIRROR_SESSION traps

 *   - time_stamp[37:30] = Sec

 *   - time_stamp[29:0] = nSec

 *   Formats 0..2 are configured by

 *   CONFIG_PROFILE.cqe_time_stamp_type for PTP traps

 *   Format 3 is used for MIRROR_SESSION traps

 *   Note that Spectrum does not reveal FRC, UTC and Mirror_UTC

 */

MLXSW_ITEM32(pci, cqe2, time_stamp_low, 0x0C, 16, 16);



#define MLXSW_PCI_CQE2_MIRROR_TCLASS_INVALID	0x1F



/* pci_cqe_mirror_tclass
@@ -280,8 +299,67 @@ MLXSW_ITEM32(pci, cqe2, user_def_val_orig_pkt_len, 0x14, 0, 20); 
 */

MLXSW_ITEM32(pci, cqe2, mirror_reason, 0x18, 24, 8);



enum mlxsw_pci_cqe_time_stamp_type {

	MLXSW_PCI_CQE_TIME_STAMP_TYPE_USEC,

	MLXSW_PCI_CQE_TIME_STAMP_TYPE_FRC,

	MLXSW_PCI_CQE_TIME_STAMP_TYPE_UTC,

	MLXSW_PCI_CQE_TIME_STAMP_TYPE_MIRROR_UTC,

};



/* pci_cqe_time_stamp_type

 * Time stamp type:

 * 0: uSec - 1.024uSec (default for devices which do not support

 * time_stamp_type)

 * 1: FRC - Free Running Clock - units of 1nSec

 * 2: UTC

 * 3: Mirror_UTC. UTC time stamp of the original packet that has

 * MIRROR_SESSION traps

 */

MLXSW_ITEM32(pci, cqe2, time_stamp_type, 0x18, 22, 2);



#define MLXSW_PCI_CQE2_MIRROR_LATENCY_INVALID	0xFFFFFF



/* pci_cqe_time_stamp_high

 * Time stamp of the CQE

 * Format according to time_stamp_type:

 * 0: uSec - 1.024uSec (default for devices which do not support

 * time_stamp_type). Only bits 15:0 are valid

 * 1: FRC - Free Running Clock - units of 1nSec

 * 2: UTC - time_stamp[37:30] = Sec

 *	  - time_stamp[29:0] = nSec

 * 3: Mirror_UTC. UTC time stamp of the original packet that has

 * MIRROR_SESSION traps

 *   - time_stamp[37:30] = Sec

 *   - time_stamp[29:0] = nSec

 *   Formats 0..2 are configured by

 *   CONFIG_PROFILE.cqe_time_stamp_type for PTP traps

 *   Format 3 is used for MIRROR_SESSION traps

 *   Note that Spectrum does not reveal FRC, UTC and Mirror_UTC

 */

MLXSW_ITEM32(pci, cqe2, time_stamp_high, 0x18, 0, 22);



static inline u64 mlxsw_pci_cqe2_time_stamp_get(const char *cqe)

{

	u64 ts_high = mlxsw_pci_cqe2_time_stamp_high_get(cqe);

	u64 ts_low = mlxsw_pci_cqe2_time_stamp_low_get(cqe);



	return ts_high << 16 | ts_low;

}



static inline u8 mlxsw_pci_cqe2_time_stamp_sec_get(const char *cqe)

{

	u64 full_ts = mlxsw_pci_cqe2_time_stamp_get(cqe);



	return full_ts >> 30 & 0xFF;

}



static inline u32 mlxsw_pci_cqe2_time_stamp_nsec_get(const char *cqe)

{

	u64 full_ts = mlxsw_pci_cqe2_time_stamp_get(cqe);



	return full_ts & 0x3FFFFFFF;

}



/* pci_cqe_mirror_latency

 * End-to-end latency of the original packet that does mirroring to the CPU.

 * Value of 0xFFFFFF means that the latency is invalid. Units are according to