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/*
* Copyright (C) 2013-2014 Chelsio Communications. All rights reserved.
*
* Written by Anish Bhatt (anish@chelsio.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
*/
#ifndef __CXGB4_DCB_H
#define __CXGB4_DCB_H
#include <linux/netdevice.h>
#include <linux/dcbnl.h>
#include <net/dcbnl.h>
#ifdef CONFIG_CHELSIO_T4_DCB
#define CXGB4_DCBX_FW_SUPPORT \
(DCB_CAP_DCBX_VER_CEE | \
DCB_CAP_DCBX_VER_IEEE | \
DCB_CAP_DCBX_LLD_MANAGED)
#define CXGB4_DCBX_HOST_SUPPORT \
(DCB_CAP_DCBX_VER_CEE | \
DCB_CAP_DCBX_VER_IEEE | \
DCB_CAP_DCBX_HOST)
#define CXGB4_MAX_PRIORITY CXGB4_MAX_DCBX_APP_SUPPORTED
#define CXGB4_MAX_TCS CXGB4_MAX_DCBX_APP_SUPPORTED
#define INIT_PORT_DCB_CMD(__pcmd, __port, __op, __action) \
do { \
memset(&(__pcmd), 0, sizeof(__pcmd)); \
(__pcmd).op_to_portid = \
cpu_to_be32(FW_CMD_OP_V(FW_PORT_CMD) | \
FW_CMD_REQUEST_F | \
FW_CMD_##__op##_F | \
FW_PORT_CMD_PORTID_V(__port)); \
(__pcmd).action_to_len16 = \
cpu_to_be32(FW_PORT_CMD_ACTION_V(__action) | \
FW_LEN16(pcmd)); \
} while (0)
#define INIT_PORT_DCB_READ_PEER_CMD(__pcmd, __port) \
INIT_PORT_DCB_CMD(__pcmd, __port, READ, FW_PORT_ACTION_DCB_READ_RECV)
#define INIT_PORT_DCB_READ_LOCAL_CMD(__pcmd, __port) \
INIT_PORT_DCB_CMD(__pcmd, __port, READ, FW_PORT_ACTION_DCB_READ_TRANS)
#define INIT_PORT_DCB_READ_SYNC_CMD(__pcmd, __port) \
INIT_PORT_DCB_CMD(__pcmd, __port, READ, FW_PORT_ACTION_DCB_READ_DET)
#define INIT_PORT_DCB_WRITE_CMD(__pcmd, __port) \
INIT_PORT_DCB_CMD(__pcmd, __port, EXEC, FW_PORT_ACTION_L2_DCB_CFG)
#define IEEE_FAUX_SYNC(__dev, __dcb) \
do { \
if ((__dcb)->dcb_version == FW_PORT_DCB_VER_IEEE) \
cxgb4_dcb_state_fsm((__dev), \
CXGB4_DCB_INPUT_FW_ALLSYNCED); \
} while (0)
/* States we can be in for a port's Data Center Bridging.
*/
enum cxgb4_dcb_state {
CXGB4_DCB_STATE_START, /* initial unknown state */
CXGB4_DCB_STATE_HOST, /* we're using Host DCB (if at all) */
CXGB4_DCB_STATE_FW_INCOMPLETE, /* using firmware DCB, incomplete */
CXGB4_DCB_STATE_FW_ALLSYNCED, /* using firmware DCB, all sync'ed */
};
/* Data Center Bridging state input for the Finite State Machine.
*/
enum cxgb4_dcb_state_input {
/* Input from the firmware.
*/
CXGB4_DCB_INPUT_FW_DISABLED, /* firmware DCB disabled */
CXGB4_DCB_INPUT_FW_ENABLED, /* firmware DCB enabled */
CXGB4_DCB_INPUT_FW_INCOMPLETE, /* firmware reports incomplete DCB */
CXGB4_DCB_INPUT_FW_ALLSYNCED, /* firmware reports all sync'ed */
};
/* Firmware DCB messages that we've received so far ...
*/
enum cxgb4_dcb_fw_msgs {
CXGB4_DCB_FW_PGID = 0x01,
CXGB4_DCB_FW_PGRATE = 0x02,
CXGB4_DCB_FW_PRIORATE = 0x04,
CXGB4_DCB_FW_PFC = 0x08,
CXGB4_DCB_FW_APP_ID = 0x10,
};
#define CXGB4_MAX_DCBX_APP_SUPPORTED 8
/* Data Center Bridging support;
*/
struct port_dcb_info {
enum cxgb4_dcb_state state; /* DCB State Machine */
enum cxgb4_dcb_fw_msgs msgs; /* DCB Firmware messages received */
unsigned int supported; /* OS DCB capabilities supported */
bool enabled; /* OS Enabled state */
/* Cached copies of DCB information sent by the firmware (in Host
* Native Endian format).
*/
u32 pgid; /* Priority Group[0..7] */
u8 dcb_version; /* Running DCBx version */
u8 pfcen; /* Priority Flow Control[0..7] */
u8 pg_num_tcs_supported; /* max PG Traffic Classes */
u8 pfc_num_tcs_supported; /* max PFC Traffic Classes */
u8 pgrate[8]; /* Priority Group Rate[0..7] */
u8 priorate[8]; /* Priority Rate[0..7] */
u8 tsa[8]; /* TSA Algorithm[0..7] */
struct app_priority { /* Application Information */
u8 user_prio_map; /* Priority Map bitfield */
u8 sel_field; /* Protocol ID interpretation */
u16 protocolid; /* Protocol ID */
} app_priority[CXGB4_MAX_DCBX_APP_SUPPORTED];
};
void cxgb4_dcb_state_init(struct net_device *);
void cxgb4_dcb_version_init(struct net_device *);
void cxgb4_dcb_state_fsm(struct net_device *, enum cxgb4_dcb_state_input);
void cxgb4_dcb_handle_fw_update(struct adapter *, const struct fw_port_cmd *);
void cxgb4_dcb_set_caps(struct adapter *, const struct fw_port_cmd *);
extern const struct dcbnl_rtnl_ops cxgb4_dcb_ops;
static inline __u8 bitswap_1(unsigned char val)
{
return ((val & 0x80) >> 7) |
((val & 0x40) >> 5) |
((val & 0x20) >> 3) |
((val & 0x10) >> 1) |
((val & 0x08) << 1) |
((val & 0x04) << 3) |
((val & 0x02) << 5) |
((val & 0x01) << 7);
}
#define CXGB4_DCB_ENABLED true
#else /* !CONFIG_CHELSIO_T4_DCB */
static inline void cxgb4_dcb_state_init(struct net_device *dev)
{
}
#define CXGB4_DCB_ENABLED false
#endif /* !CONFIG_CHELSIO_T4_DCB */
#endif /* __CXGB4_DCB_H */
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