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mlxsw: reg: Add Port Prio To Buffer register 

When packets ingress the switch they are assigned a switch priority
number that dictates the packet's priority group (PG) buffer in the
port's headroom buffer.

Add the Port Prio To Buffer (PPTB) register, which configures the switch
priority to PG mapping.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2016-04-06 17:10:00 +02:00 committed by David S. Miller
parent 92b6d35fac
commit b98ff151b6
1 changed files with 83 additions and 0 deletions
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83
drivers/net/ethernet/mellanox/mlxsw/reg.h
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@ -2340,6 +2340,87 @@ static inline void mlxsw_reg_ppcnt_pack(char *payload, u8 local_port)
mlxsw_reg_ppcnt_prio_tc_set(payload, 0);
}
/* PPTB - Port Prio To Buffer Register
* -----------------------------------
* Configures the switch priority to buffer table.
*/
#define MLXSW_REG_PPTB_ID 0x500B
#define MLXSW_REG_PPTB_LEN 0x0C
static const struct mlxsw_reg_info mlxsw_reg_pptb = {
.id = MLXSW_REG_PPTB_ID,
.len = MLXSW_REG_PPTB_LEN,
};
enum {
MLXSW_REG_PPTB_MM_UM,
MLXSW_REG_PPTB_MM_UNICAST,
MLXSW_REG_PPTB_MM_MULTICAST,
};
/* reg_pptb_mm
* Mapping mode.
* 0 - Map both unicast and multicast packets to the same buffer.
* 1 - Map only unicast packets.
* 2 - Map only multicast packets.
* Access: Index
*
* Note: SwitchX-2 only supports the first option.
*/
MLXSW_ITEM32(reg, pptb, mm, 0x00, 28, 2);
/* reg_pptb_local_port
* Local port number.
* Access: Index
*/
MLXSW_ITEM32(reg, pptb, local_port, 0x00, 16, 8);
/* reg_pptb_um
* Enables the update of the untagged_buf field.
* Access: RW
*/
MLXSW_ITEM32(reg, pptb, um, 0x00, 8, 1);
/* reg_pptb_pm
* Enables the update of the prio_to_buff field.
* Bit <i> is a flag for updating the mapping for switch priority <i>.
* Access: RW
*/
MLXSW_ITEM32(reg, pptb, pm, 0x00, 0, 8);
/* reg_pptb_prio_to_buff
* Mapping of switch priority <i> to one of the allocated receive port
* buffers.
* Access: RW
*/
MLXSW_ITEM_BIT_ARRAY(reg, pptb, prio_to_buff, 0x04, 0x04, 4);
/* reg_pptb_pm_msb
* Enables the update of the prio_to_buff field.
* Bit <i> is a flag for updating the mapping for switch priority <i+8>.
* Access: RW
*/
MLXSW_ITEM32(reg, pptb, pm_msb, 0x08, 24, 8);
/* reg_pptb_untagged_buff
* Mapping of untagged frames to one of the allocated receive port buffers.
* Access: RW
*
* Note: In SwitchX-2 this field must be mapped to buffer 8. Reserved for
* Spectrum, as it maps untagged packets based on the default switch priority.
*/
MLXSW_ITEM32(reg, pptb, untagged_buff, 0x08, 0, 4);
#define MLXSW_REG_PPTB_ALL_PRIO 0xFF
static inline void mlxsw_reg_pptb_pack(char *payload, u8 local_port)
{
MLXSW_REG_ZERO(pptb, payload);
mlxsw_reg_pptb_mm_set(payload, MLXSW_REG_PPTB_MM_UM);
mlxsw_reg_pptb_local_port_set(payload, local_port);
mlxsw_reg_pptb_pm_set(payload, MLXSW_REG_PPTB_ALL_PRIO);
}
/* PBMC - Port Buffer Management Control Register
* ----------------------------------------------
* The PBMC register configures and retrieves the port packet buffer
@ -3295,6 +3376,8 @@ static inline const char *mlxsw_reg_id_str(u16 reg_id)
return "PAOS";
case MLXSW_REG_PPCNT_ID:
return "PPCNT";
case MLXSW_REG_PPTB_ID:
return "PPTB";
case MLXSW_REG_PBMC_ID:
return "PBMC";
case MLXSW_REG_PSPA_ID: