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linux-next/net/ncsi/internal.h
Gavin Shan bbc7c01e95 net/ncsi: Choose hot channel as active one if necessary 
The issue was found on BCM5718 which has two NCSI channels in one
package: C0 and C1. C0 is in link-up state while C1 is in link-down
state. C0 is chosen as active channel until unplugging and plugging
C0's cable:  On unplugging C0's cable, LSC (Link State Change) AEN
packet received on C0 to report link-down event. After that, C1 is
chosen as active channel. LSC AEN for link-up event is lost on C0
when plugging C0's cable back. We lose the network even C0 is usable.

This resolves the issue by recording the (hot) channel that was ever
chosen as active one. The hot channel is chosen to be active one
if none of available channels in link-up state. With this, C0 is still
the active one after unplugging C0's cable. LSC AEN packet received
on C0 when plugging its cable back.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-20 11:23:07 -04:00

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/*
* Copyright Gavin Shan, IBM Corporation 2016.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __NCSI_INTERNAL_H__
#define __NCSI_INTERNAL_H__
enum {
NCSI_CAP_BASE = 0,
NCSI_CAP_GENERIC = 0,
NCSI_CAP_BC,
NCSI_CAP_MC,
NCSI_CAP_BUFFER,
NCSI_CAP_AEN,
NCSI_CAP_VLAN,
NCSI_CAP_MAX
};
enum {
NCSI_CAP_GENERIC_HWA = 0x01, /* HW arbitration */
NCSI_CAP_GENERIC_HDS = 0x02, /* HNC driver status change */
NCSI_CAP_GENERIC_FC = 0x04, /* HNC to MC flow control */
NCSI_CAP_GENERIC_FC1 = 0x08, /* MC to HNC flow control */
NCSI_CAP_GENERIC_MC = 0x10, /* Global MC filtering */
NCSI_CAP_GENERIC_HWA_UNKNOWN = 0x00, /* Unknown HW arbitration */
NCSI_CAP_GENERIC_HWA_SUPPORT = 0x20, /* Supported HW arbitration */
NCSI_CAP_GENERIC_HWA_NOT_SUPPORT = 0x40, /* No HW arbitration */
NCSI_CAP_GENERIC_HWA_RESERVED = 0x60, /* Reserved HW arbitration */
NCSI_CAP_GENERIC_HWA_MASK = 0x60, /* Mask for HW arbitration */
NCSI_CAP_GENERIC_MASK = 0x7f,
NCSI_CAP_BC_ARP = 0x01, /* ARP packet filtering */
NCSI_CAP_BC_DHCPC = 0x02, /* DHCP client filtering */
NCSI_CAP_BC_DHCPS = 0x04, /* DHCP server filtering */
NCSI_CAP_BC_NETBIOS = 0x08, /* NetBIOS packet filtering */
NCSI_CAP_BC_MASK = 0x0f,
NCSI_CAP_MC_IPV6_NEIGHBOR = 0x01, /* IPv6 neighbor filtering */
NCSI_CAP_MC_IPV6_ROUTER = 0x02, /* IPv6 router filering */
NCSI_CAP_MC_DHCPV6_RELAY = 0x04, /* DHCPv6 relay / server MC */
NCSI_CAP_MC_DHCPV6_WELL_KNOWN = 0x08, /* DHCPv6 well-known MC */
NCSI_CAP_MC_IPV6_MLD = 0x10, /* IPv6 MLD filtering */
NCSI_CAP_MC_IPV6_NEIGHBOR_S = 0x20, /* IPv6 neighbour filtering */
NCSI_CAP_MC_MASK = 0x3f,
NCSI_CAP_AEN_LSC = 0x01, /* Link status change */
NCSI_CAP_AEN_CR = 0x02, /* Configuration required */
NCSI_CAP_AEN_HDS = 0x04, /* HNC driver status */
NCSI_CAP_AEN_MASK = 0x07,
NCSI_CAP_VLAN_ONLY = 0x01, /* Filter VLAN packet only */
NCSI_CAP_VLAN_NO = 0x02, /* Filter VLAN and non-VLAN */
NCSI_CAP_VLAN_ANY = 0x04, /* Filter Any-and-non-VLAN */
NCSI_CAP_VLAN_MASK = 0x07
};
enum {
NCSI_MODE_BASE = 0,
NCSI_MODE_ENABLE = 0,
NCSI_MODE_TX_ENABLE,
NCSI_MODE_LINK,
NCSI_MODE_VLAN,
NCSI_MODE_BC,
NCSI_MODE_MC,
NCSI_MODE_AEN,
NCSI_MODE_FC,
NCSI_MODE_MAX
};
enum {
NCSI_FILTER_BASE = 0,
NCSI_FILTER_VLAN = 0,
NCSI_FILTER_UC,
NCSI_FILTER_MC,
NCSI_FILTER_MIXED,
NCSI_FILTER_MAX
};
struct ncsi_channel_version {
u32 version; /* Supported BCD encoded NCSI version */
u32 alpha2; /* Supported BCD encoded NCSI version */
u8 fw_name[12]; /* Firware name string */
u32 fw_version; /* Firmware version */
u16 pci_ids[4]; /* PCI identification */
u32 mf_id; /* Manufacture ID */
};
struct ncsi_channel_cap {
u32 index; /* Index of channel capabilities */
u32 cap; /* NCSI channel capability */
};
struct ncsi_channel_mode {
u32 index; /* Index of channel modes */
u32 enable; /* Enabled or disabled */
u32 size; /* Valid entries in ncm_data[] */
u32 data[8]; /* Data entries */
};
struct ncsi_channel_filter {
u32 index; /* Index of channel filters */
u32 total; /* Total entries in the filter table */
u64 bitmap; /* Bitmap of valid entries */
u32 data[]; /* Data for the valid entries */
};
struct ncsi_channel_stats {
u32 hnc_cnt_hi; /* Counter cleared */
u32 hnc_cnt_lo; /* Counter cleared */
u32 hnc_rx_bytes; /* Rx bytes */
u32 hnc_tx_bytes; /* Tx bytes */
u32 hnc_rx_uc_pkts; /* Rx UC packets */
u32 hnc_rx_mc_pkts; /* Rx MC packets */
u32 hnc_rx_bc_pkts; /* Rx BC packets */
u32 hnc_tx_uc_pkts; /* Tx UC packets */
u32 hnc_tx_mc_pkts; /* Tx MC packets */
u32 hnc_tx_bc_pkts; /* Tx BC packets */
u32 hnc_fcs_err; /* FCS errors */
u32 hnc_align_err; /* Alignment errors */
u32 hnc_false_carrier; /* False carrier detection */
u32 hnc_runt_pkts; /* Rx runt packets */
u32 hnc_jabber_pkts; /* Rx jabber packets */
u32 hnc_rx_pause_xon; /* Rx pause XON frames */
u32 hnc_rx_pause_xoff; /* Rx XOFF frames */
u32 hnc_tx_pause_xon; /* Tx XON frames */
u32 hnc_tx_pause_xoff; /* Tx XOFF frames */
u32 hnc_tx_s_collision; /* Single collision frames */
u32 hnc_tx_m_collision; /* Multiple collision frames */
u32 hnc_l_collision; /* Late collision frames */
u32 hnc_e_collision; /* Excessive collision frames */
u32 hnc_rx_ctl_frames; /* Rx control frames */
u32 hnc_rx_64_frames; /* Rx 64-bytes frames */
u32 hnc_rx_127_frames; /* Rx 65-127 bytes frames */
u32 hnc_rx_255_frames; /* Rx 128-255 bytes frames */
u32 hnc_rx_511_frames; /* Rx 256-511 bytes frames */
u32 hnc_rx_1023_frames; /* Rx 512-1023 bytes frames */
u32 hnc_rx_1522_frames; /* Rx 1024-1522 bytes frames */
u32 hnc_rx_9022_frames; /* Rx 1523-9022 bytes frames */
u32 hnc_tx_64_frames; /* Tx 64-bytes frames */
u32 hnc_tx_127_frames; /* Tx 65-127 bytes frames */
u32 hnc_tx_255_frames; /* Tx 128-255 bytes frames */
u32 hnc_tx_511_frames; /* Tx 256-511 bytes frames */
u32 hnc_tx_1023_frames; /* Tx 512-1023 bytes frames */
u32 hnc_tx_1522_frames; /* Tx 1024-1522 bytes frames */
u32 hnc_tx_9022_frames; /* Tx 1523-9022 bytes frames */
u32 hnc_rx_valid_bytes; /* Rx valid bytes */
u32 hnc_rx_runt_pkts; /* Rx error runt packets */
u32 hnc_rx_jabber_pkts; /* Rx error jabber packets */
u32 ncsi_rx_cmds; /* Rx NCSI commands */
u32 ncsi_dropped_cmds; /* Dropped commands */
u32 ncsi_cmd_type_errs; /* Command type errors */
u32 ncsi_cmd_csum_errs; /* Command checksum errors */
u32 ncsi_rx_pkts; /* Rx NCSI packets */
u32 ncsi_tx_pkts; /* Tx NCSI packets */
u32 ncsi_tx_aen_pkts; /* Tx AEN packets */
u32 pt_tx_pkts; /* Tx packets */
u32 pt_tx_dropped; /* Tx dropped packets */
u32 pt_tx_channel_err; /* Tx channel errors */
u32 pt_tx_us_err; /* Tx undersize errors */
u32 pt_rx_pkts; /* Rx packets */
u32 pt_rx_dropped; /* Rx dropped packets */
u32 pt_rx_channel_err; /* Rx channel errors */
u32 pt_rx_us_err; /* Rx undersize errors */
u32 pt_rx_os_err; /* Rx oversize errors */
};
struct ncsi_dev_priv;
struct ncsi_package;
#define NCSI_PACKAGE_SHIFT 5
#define NCSI_PACKAGE_INDEX(c) (((c) >> NCSI_PACKAGE_SHIFT) & 0x7)
#define NCSI_RESERVED_CHANNEL 0x1f
#define NCSI_CHANNEL_INDEX(c) ((c) & ((1 << NCSI_PACKAGE_SHIFT) - 1))
#define NCSI_TO_CHANNEL(p, c) (((p) << NCSI_PACKAGE_SHIFT) | (c))
struct ncsi_channel {
unsigned char id;
int state;
#define NCSI_CHANNEL_INACTIVE 1
#define NCSI_CHANNEL_ACTIVE 2
#define NCSI_CHANNEL_INVISIBLE 3
spinlock_t lock; /* Protect filters etc */
struct ncsi_package *package;
struct ncsi_channel_version version;
struct ncsi_channel_cap caps[NCSI_CAP_MAX];
struct ncsi_channel_mode modes[NCSI_MODE_MAX];
struct ncsi_channel_filter *filters[NCSI_FILTER_MAX];
struct ncsi_channel_stats stats;
struct {
struct timer_list timer;
bool enabled;
unsigned int state;
#define NCSI_CHANNEL_MONITOR_START 0
#define NCSI_CHANNEL_MONITOR_RETRY 1
#define NCSI_CHANNEL_MONITOR_WAIT 2
#define NCSI_CHANNEL_MONITOR_WAIT_MAX 5
} monitor;
struct list_head node;
struct list_head link;
};
struct ncsi_package {
unsigned char id; /* NCSI 3-bits package ID */
unsigned char uuid[16]; /* UUID */
struct ncsi_dev_priv *ndp; /* NCSI device */
spinlock_t lock; /* Protect the package */
unsigned int channel_num; /* Number of channels */
struct list_head channels; /* List of chanels */
struct list_head node; /* Form list of packages */
};
struct ncsi_request {
unsigned char id; /* Request ID - 0 to 255 */
bool used; /* Request that has been assigned */
unsigned int flags; /* NCSI request property */
#define NCSI_REQ_FLAG_EVENT_DRIVEN 1
struct ncsi_dev_priv *ndp; /* Associated NCSI device */
struct sk_buff *cmd; /* Associated NCSI command packet */
struct sk_buff *rsp; /* Associated NCSI response packet */
struct timer_list timer; /* Timer on waiting for response */
bool enabled; /* Time has been enabled or not */
};
enum {
ncsi_dev_state_major = 0xff00,
ncsi_dev_state_minor = 0x00ff,
ncsi_dev_state_probe_deselect = 0x0201,
ncsi_dev_state_probe_package,
ncsi_dev_state_probe_channel,
ncsi_dev_state_probe_cis,
ncsi_dev_state_probe_gvi,
ncsi_dev_state_probe_gc,
ncsi_dev_state_probe_gls,
ncsi_dev_state_probe_dp,
ncsi_dev_state_config_sp = 0x0301,
ncsi_dev_state_config_cis,
ncsi_dev_state_config_sma,
ncsi_dev_state_config_ebf,
#if IS_ENABLED(CONFIG_IPV6)
ncsi_dev_state_config_egmf,
#endif
ncsi_dev_state_config_ecnt,
ncsi_dev_state_config_ec,
ncsi_dev_state_config_ae,
ncsi_dev_state_config_gls,
ncsi_dev_state_config_done,
ncsi_dev_state_suspend_select = 0x0401,
ncsi_dev_state_suspend_gls,
ncsi_dev_state_suspend_dcnt,
ncsi_dev_state_suspend_dc,
ncsi_dev_state_suspend_deselect,
ncsi_dev_state_suspend_done
};
struct ncsi_dev_priv {
struct ncsi_dev ndev; /* Associated NCSI device */
unsigned int flags; /* NCSI device flags */
#define NCSI_DEV_PROBED 1 /* Finalized NCSI topology */
#define NCSI_DEV_HWA 2 /* Enabled HW arbitration */
#define NCSI_DEV_RESHUFFLE 4
spinlock_t lock; /* Protect the NCSI device */
#if IS_ENABLED(CONFIG_IPV6)
unsigned int inet6_addr_num; /* Number of IPv6 addresses */
#endif
unsigned int package_num; /* Number of packages */
struct list_head packages; /* List of packages */
struct ncsi_channel *hot_channel; /* Channel was ever active */
struct ncsi_request requests[256]; /* Request table */
unsigned int request_id; /* Last used request ID */
#define NCSI_REQ_START_IDX 1
unsigned int pending_req_num; /* Number of pending requests */
struct ncsi_package *active_package; /* Currently handled package */
struct ncsi_channel *active_channel; /* Currently handled channel */
struct list_head channel_queue; /* Config queue of channels */
struct work_struct work; /* For channel management */
struct packet_type ptype; /* NCSI packet Rx handler */
struct list_head node; /* Form NCSI device list */
};
struct ncsi_cmd_arg {
struct ncsi_dev_priv *ndp; /* Associated NCSI device */
unsigned char type; /* Command in the NCSI packet */
unsigned char id; /* Request ID (sequence number) */
unsigned char package; /* Destination package ID */
unsigned char channel; /* Detination channel ID or 0x1f */
unsigned short payload; /* Command packet payload length */
unsigned int req_flags; /* NCSI request properties */
union {
unsigned char bytes[16]; /* Command packet specific data */
unsigned short words[8];
unsigned int dwords[4];
};
};
extern struct list_head ncsi_dev_list;
extern spinlock_t ncsi_dev_lock;
#define TO_NCSI_DEV_PRIV(nd) \
container_of(nd, struct ncsi_dev_priv, ndev)
#define NCSI_FOR_EACH_DEV(ndp) \
list_for_each_entry_rcu(ndp, &ncsi_dev_list, node)
#define NCSI_FOR_EACH_PACKAGE(ndp, np) \
list_for_each_entry_rcu(np, &ndp->packages, node)
#define NCSI_FOR_EACH_CHANNEL(np, nc) \
list_for_each_entry_rcu(nc, &np->channels, node)
/* Resources */
int ncsi_find_filter(struct ncsi_channel *nc, int table, void *data);
int ncsi_add_filter(struct ncsi_channel *nc, int table, void *data);
int ncsi_remove_filter(struct ncsi_channel *nc, int table, int index);
void ncsi_start_channel_monitor(struct ncsi_channel *nc);
void ncsi_stop_channel_monitor(struct ncsi_channel *nc);
struct ncsi_channel *ncsi_find_channel(struct ncsi_package *np,
unsigned char id);
struct ncsi_channel *ncsi_add_channel(struct ncsi_package *np,
unsigned char id);
struct ncsi_package *ncsi_find_package(struct ncsi_dev_priv *ndp,
unsigned char id);
struct ncsi_package *ncsi_add_package(struct ncsi_dev_priv *ndp,
unsigned char id);
void ncsi_remove_package(struct ncsi_package *np);
void ncsi_find_package_and_channel(struct ncsi_dev_priv *ndp,
unsigned char id,
struct ncsi_package **np,
struct ncsi_channel **nc);
struct ncsi_request *ncsi_alloc_request(struct ncsi_dev_priv *ndp,
unsigned int req_flags);
void ncsi_free_request(struct ncsi_request *nr);
struct ncsi_dev *ncsi_find_dev(struct net_device *dev);
int ncsi_process_next_channel(struct ncsi_dev_priv *ndp);
/* Packet handlers */
u32 ncsi_calculate_checksum(unsigned char *data, int len);
int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca);
int ncsi_rcv_rsp(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt, struct net_device *orig_dev);
int ncsi_aen_handler(struct ncsi_dev_priv *ndp, struct sk_buff *skb);
#endif /* __NCSI_INTERNAL_H__ */
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