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linux/net/ncsi/internal.h
Samuel Mendoza-Jonas 6e9c007540 net/ncsi: Don't limit vids based on hot_channel 
Currently we drop any new VLAN ids if there are more than the current
(or last used) channel can support. Most importantly this is a problem
if no channel has been selected yet, resulting in a segfault.

Secondly this does not necessarily reflect the capabilities of any other
channels. Instead only drop a new VLAN id if we are already tracking the
maximum allowed by the NCSI specification. Per-channel limits are
already handled by ncsi_add_filter(), but add a message to set_one_vid()
to make it obvious that the channel can not support any more VLAN ids.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-11 20:10:37 -07:00

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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
bool reconfigure_needed;
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_clear_vids,
ncsi_dev_state_config_svf,
ncsi_dev_state_config_ev,
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 vlan_vid {
struct list_head list;
__be16 proto;
u16 vid;
};
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 */
#define NCSI_MAX_VLAN_VIDS 15
struct list_head vlan_vids; /* List of active VLAN IDs */
};
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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