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Commit 155f9de2 authored by Ido Schimmel's avatar Ido Schimmel Committed by David S. Miller
Browse files

mlxsw: reg: Add lossless settings for PBMC register 



When configuring PAUSE frames and PFC we'll need to configure the
Xon/Xoff threshold for the priority group (PG) buffers.

Add the Xon/Xoff threshold fields to the PBMC register so that we can
configure these when needed.

Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6f253d83

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

+35 −0
Original line number Diff line number Diff line
@@ -2788,6 +2788,30 @@ MLXSW_ITEM32_INDEXED(reg, pbmc, buf_epsb, 0x0C, 24, 1, 0x08, 0x00, false); 
 */

MLXSW_ITEM32_INDEXED(reg, pbmc, buf_size, 0x0C, 0, 16, 0x08, 0x00, false);



/* reg_pbmc_buf_xoff_threshold

 * Once the amount of data in the buffer goes above this value, device

 * starts sending PFC frames for all priorities associated with the

 * buffer. Units are represented in cells. Reserved in case of lossy

 * buffer.

 * Access: RW

 *

 * Note: In Spectrum, reserved for buffer[9].

 */

MLXSW_ITEM32_INDEXED(reg, pbmc, buf_xoff_threshold, 0x0C, 16, 16,

		     0x08, 0x04, false);



/* reg_pbmc_buf_xon_threshold

 * When the amount of data in the buffer goes below this value, device

 * stops sending PFC frames for the priorities associated with the

 * buffer. Units are represented in cells. Reserved in case of lossy

 * buffer.

 * Access: RW

 *

 * Note: In Spectrum, reserved for buffer[9].

 */

MLXSW_ITEM32_INDEXED(reg, pbmc, buf_xon_threshold, 0x0C, 0, 16,

		     0x08, 0x04, false);



static inline void mlxsw_reg_pbmc_pack(char *payload, u8 local_port,

				       u16 xoff_timer_value, u16 xoff_refresh)

{
@@ -2806,6 +2830,17 @@ static inline void mlxsw_reg_pbmc_lossy_buffer_pack(char *payload, 
	mlxsw_reg_pbmc_buf_size_set(payload, buf_index, size);

}



static inline void mlxsw_reg_pbmc_lossless_buffer_pack(char *payload,

						       int buf_index, u16 size,

						       u16 threshold)

{

	mlxsw_reg_pbmc_buf_lossy_set(payload, buf_index, 0);

	mlxsw_reg_pbmc_buf_epsb_set(payload, buf_index, 0);

	mlxsw_reg_pbmc_buf_size_set(payload, buf_index, size);

	mlxsw_reg_pbmc_buf_xoff_threshold_set(payload, buf_index, threshold);

	mlxsw_reg_pbmc_buf_xon_threshold_set(payload, buf_index, threshold);

}



/* PSPA - Port Switch Partition Allocation

 * ---------------------------------------

 * Controls the association of a port with a switch partition and enables