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10b0046685
* Changes required due to 16eecd9be4 ("dcbnl : Fix misleading
dcb_app->priority explanation")
* Driver was previously not aware of what DCBx version was negotiated by
firmware, this could lead to DCB app table in kernel or in firmware being
populated wrong since IEEE/CEE used different formats made clear by above
mentioned commit
* Driver was missing a couple of state transitions that could be caused
by other drivers that use chelsio hardware, resulting in incorrect behaviour
(the change that addresses this also flips the state machine to switch on
state instead of transition, hope this is okay in current window)
* Prio queue info & tsa is no longer thrown away
v2: Print DCBx state transition messages only when debug is enabled
Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
152 lines
4.8 KiB
C
152 lines
4.8 KiB
C
/*
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* Copyright (C) 2013-2014 Chelsio Communications. All rights reserved.
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*
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* Written by Anish Bhatt (anish@chelsio.com)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* The full GNU General Public License is included in this distribution in
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* the file called "COPYING".
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*
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*/
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#ifndef __CXGB4_DCB_H
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#define __CXGB4_DCB_H
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#include <linux/netdevice.h>
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#include <linux/dcbnl.h>
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#include <net/dcbnl.h>
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#ifdef CONFIG_CHELSIO_T4_DCB
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#define CXGB4_DCBX_FW_SUPPORT \
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(DCB_CAP_DCBX_VER_CEE | \
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DCB_CAP_DCBX_VER_IEEE | \
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DCB_CAP_DCBX_LLD_MANAGED)
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#define CXGB4_DCBX_HOST_SUPPORT \
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(DCB_CAP_DCBX_VER_CEE | \
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DCB_CAP_DCBX_VER_IEEE | \
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DCB_CAP_DCBX_HOST)
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#define CXGB4_MAX_PRIORITY CXGB4_MAX_DCBX_APP_SUPPORTED
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#define CXGB4_MAX_TCS CXGB4_MAX_DCBX_APP_SUPPORTED
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#define INIT_PORT_DCB_CMD(__pcmd, __port, __op, __action) \
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do { \
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memset(&(__pcmd), 0, sizeof(__pcmd)); \
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(__pcmd).op_to_portid = \
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cpu_to_be32(FW_CMD_OP(FW_PORT_CMD) | \
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FW_CMD_REQUEST | \
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FW_CMD_##__op | \
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FW_PORT_CMD_PORTID(__port)); \
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(__pcmd).action_to_len16 = \
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cpu_to_be32(FW_PORT_CMD_ACTION(__action) | \
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FW_LEN16(pcmd)); \
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} while (0)
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#define INIT_PORT_DCB_READ_PEER_CMD(__pcmd, __port) \
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INIT_PORT_DCB_CMD(__pcmd, __port, READ, FW_PORT_ACTION_DCB_READ_RECV)
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#define INIT_PORT_DCB_READ_LOCAL_CMD(__pcmd, __port) \
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INIT_PORT_DCB_CMD(__pcmd, __port, READ, FW_PORT_ACTION_DCB_READ_TRANS)
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#define INIT_PORT_DCB_READ_SYNC_CMD(__pcmd, __port) \
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INIT_PORT_DCB_CMD(__pcmd, __port, READ, FW_PORT_ACTION_DCB_READ_DET)
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#define INIT_PORT_DCB_WRITE_CMD(__pcmd, __port) \
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INIT_PORT_DCB_CMD(__pcmd, __port, EXEC, FW_PORT_ACTION_L2_DCB_CFG)
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#define IEEE_FAUX_SYNC(__dev, __dcb) \
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do { \
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if ((__dcb)->dcb_version == FW_PORT_DCB_VER_IEEE) \
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cxgb4_dcb_state_fsm((__dev), \
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CXGB4_DCB_STATE_FW_ALLSYNCED); \
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} while (0)
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/* States we can be in for a port's Data Center Bridging.
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*/
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enum cxgb4_dcb_state {
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CXGB4_DCB_STATE_START, /* initial unknown state */
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CXGB4_DCB_STATE_HOST, /* we're using Host DCB (if at all) */
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CXGB4_DCB_STATE_FW_INCOMPLETE, /* using firmware DCB, incomplete */
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CXGB4_DCB_STATE_FW_ALLSYNCED, /* using firmware DCB, all sync'ed */
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};
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/* Data Center Bridging state input for the Finite State Machine.
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*/
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enum cxgb4_dcb_state_input {
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/* Input from the firmware.
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*/
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CXGB4_DCB_INPUT_FW_DISABLED, /* firmware DCB disabled */
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CXGB4_DCB_INPUT_FW_ENABLED, /* firmware DCB enabled */
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CXGB4_DCB_INPUT_FW_INCOMPLETE, /* firmware reports incomplete DCB */
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CXGB4_DCB_INPUT_FW_ALLSYNCED, /* firmware reports all sync'ed */
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};
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/* Firmware DCB messages that we've received so far ...
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*/
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enum cxgb4_dcb_fw_msgs {
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CXGB4_DCB_FW_PGID = 0x01,
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CXGB4_DCB_FW_PGRATE = 0x02,
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CXGB4_DCB_FW_PRIORATE = 0x04,
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CXGB4_DCB_FW_PFC = 0x08,
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CXGB4_DCB_FW_APP_ID = 0x10,
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};
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#define CXGB4_MAX_DCBX_APP_SUPPORTED 8
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/* Data Center Bridging support;
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*/
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struct port_dcb_info {
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enum cxgb4_dcb_state state; /* DCB State Machine */
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enum cxgb4_dcb_fw_msgs msgs; /* DCB Firmware messages received */
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unsigned int supported; /* OS DCB capabilities supported */
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bool enabled; /* OS Enabled state */
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/* Cached copies of DCB information sent by the firmware (in Host
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* Native Endian format).
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*/
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u32 pgid; /* Priority Group[0..7] */
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u8 dcb_version; /* Running DCBx version */
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u8 pfcen; /* Priority Flow Control[0..7] */
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u8 pg_num_tcs_supported; /* max PG Traffic Classes */
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u8 pfc_num_tcs_supported; /* max PFC Traffic Classes */
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u8 pgrate[8]; /* Priority Group Rate[0..7] */
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u8 priorate[8]; /* Priority Rate[0..7] */
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u8 tsa[8]; /* TSA Algorithm[0..7] */
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struct app_priority { /* Application Information */
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u8 user_prio_map; /* Priority Map bitfield */
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u8 sel_field; /* Protocol ID interpretation */
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u16 protocolid; /* Protocol ID */
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} app_priority[CXGB4_MAX_DCBX_APP_SUPPORTED];
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};
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void cxgb4_dcb_state_init(struct net_device *);
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void cxgb4_dcb_version_init(struct net_device *);
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void cxgb4_dcb_state_fsm(struct net_device *, enum cxgb4_dcb_state_input);
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void cxgb4_dcb_handle_fw_update(struct adapter *, const struct fw_port_cmd *);
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void cxgb4_dcb_set_caps(struct adapter *, const struct fw_port_cmd *);
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extern const struct dcbnl_rtnl_ops cxgb4_dcb_ops;
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#define CXGB4_DCB_ENABLED true
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#else /* !CONFIG_CHELSIO_T4_DCB */
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static inline void cxgb4_dcb_state_init(struct net_device *dev)
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{
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}
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#define CXGB4_DCB_ENABLED false
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#endif /* !CONFIG_CHELSIO_T4_DCB */
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#endif /* __CXGB4_DCB_H */
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