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On ingress, a network device such as a switch assigns to packets priority based on various criteria. Common options include interpreting PCP and DSCP fields according to user configuration. When a packet egresses the switch, a reverse process may rewrite PCP and/or DSCP values according to packet priority. The following three functions support a) obtaining a DSCP-to-priority map or vice versa, and b) finding default-priority entries in APP database. The DCB subsystem supports for APP entries a very generous M:N mapping between priorities and protocol identifiers. Understandably, several (say) DSCP values can map to the same priority. But this asymmetry holds the other way around as well--one priority can map to several DSCP values. For this reason, the following functions operate in terms of bitmaps, with ones in positions that match some APP entry. - dcb_ieee_getapp_dscp_prio_mask_map() to compute for a given netdevice a map of DSCP-to-priority-mask, which gives for each DSCP value a bitmap of priorities related to that DSCP value by APP, along the lines of dcb_ieee_getapp_mask(). - dcb_ieee_getapp_prio_dscp_mask_map() similarly to compute for a given netdevice a map from priorities to a bitmap of DSCPs. - dcb_ieee_getapp_default_prio_mask() which finds all default-priority rules for a given port in APP database, and returns a mask of priorities allowed by these default-priority rules. Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
123 lines
4.8 KiB
C
123 lines
4.8 KiB
C
/*
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* Copyright (c) 2008, Intel Corporation.
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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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* You should have received a copy of the GNU General Public License along with
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* this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Lucy Liu <lucy.liu@intel.com>
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*/
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#ifndef __NET_DCBNL_H__
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#define __NET_DCBNL_H__
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#include <linux/dcbnl.h>
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struct dcb_app_type {
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int ifindex;
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struct dcb_app app;
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struct list_head list;
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u8 dcbx;
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};
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int dcb_setapp(struct net_device *, struct dcb_app *);
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u8 dcb_getapp(struct net_device *, struct dcb_app *);
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int dcb_ieee_setapp(struct net_device *, struct dcb_app *);
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int dcb_ieee_delapp(struct net_device *, struct dcb_app *);
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u8 dcb_ieee_getapp_mask(struct net_device *, struct dcb_app *);
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struct dcb_ieee_app_prio_map {
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u64 map[IEEE_8021QAZ_MAX_TCS];
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};
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void dcb_ieee_getapp_prio_dscp_mask_map(const struct net_device *dev,
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struct dcb_ieee_app_prio_map *p_map);
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struct dcb_ieee_app_dscp_map {
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u8 map[64];
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};
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void dcb_ieee_getapp_dscp_prio_mask_map(const struct net_device *dev,
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struct dcb_ieee_app_dscp_map *p_map);
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u8 dcb_ieee_getapp_default_prio_mask(const struct net_device *dev);
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int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
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u32 seq, u32 pid);
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int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
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u32 seq, u32 pid);
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/*
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* Ops struct for the netlink callbacks. Used by DCB-enabled drivers through
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* the netdevice struct.
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*/
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struct dcbnl_rtnl_ops {
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/* IEEE 802.1Qaz std */
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int (*ieee_getets) (struct net_device *, struct ieee_ets *);
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int (*ieee_setets) (struct net_device *, struct ieee_ets *);
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int (*ieee_getmaxrate) (struct net_device *, struct ieee_maxrate *);
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int (*ieee_setmaxrate) (struct net_device *, struct ieee_maxrate *);
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int (*ieee_getqcn) (struct net_device *, struct ieee_qcn *);
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int (*ieee_setqcn) (struct net_device *, struct ieee_qcn *);
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int (*ieee_getqcnstats) (struct net_device *, struct ieee_qcn_stats *);
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int (*ieee_getpfc) (struct net_device *, struct ieee_pfc *);
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int (*ieee_setpfc) (struct net_device *, struct ieee_pfc *);
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int (*ieee_getapp) (struct net_device *, struct dcb_app *);
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int (*ieee_setapp) (struct net_device *, struct dcb_app *);
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int (*ieee_delapp) (struct net_device *, struct dcb_app *);
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int (*ieee_peer_getets) (struct net_device *, struct ieee_ets *);
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int (*ieee_peer_getpfc) (struct net_device *, struct ieee_pfc *);
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/* CEE std */
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u8 (*getstate)(struct net_device *);
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u8 (*setstate)(struct net_device *, u8);
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void (*getpermhwaddr)(struct net_device *, u8 *);
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void (*setpgtccfgtx)(struct net_device *, int, u8, u8, u8, u8);
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void (*setpgbwgcfgtx)(struct net_device *, int, u8);
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void (*setpgtccfgrx)(struct net_device *, int, u8, u8, u8, u8);
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void (*setpgbwgcfgrx)(struct net_device *, int, u8);
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void (*getpgtccfgtx)(struct net_device *, int, u8 *, u8 *, u8 *, u8 *);
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void (*getpgbwgcfgtx)(struct net_device *, int, u8 *);
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void (*getpgtccfgrx)(struct net_device *, int, u8 *, u8 *, u8 *, u8 *);
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void (*getpgbwgcfgrx)(struct net_device *, int, u8 *);
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void (*setpfccfg)(struct net_device *, int, u8);
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void (*getpfccfg)(struct net_device *, int, u8 *);
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u8 (*setall)(struct net_device *);
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u8 (*getcap)(struct net_device *, int, u8 *);
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int (*getnumtcs)(struct net_device *, int, u8 *);
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int (*setnumtcs)(struct net_device *, int, u8);
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u8 (*getpfcstate)(struct net_device *);
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void (*setpfcstate)(struct net_device *, u8);
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void (*getbcncfg)(struct net_device *, int, u32 *);
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void (*setbcncfg)(struct net_device *, int, u32);
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void (*getbcnrp)(struct net_device *, int, u8 *);
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void (*setbcnrp)(struct net_device *, int, u8);
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int (*setapp)(struct net_device *, u8, u16, u8);
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int (*getapp)(struct net_device *, u8, u16);
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u8 (*getfeatcfg)(struct net_device *, int, u8 *);
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u8 (*setfeatcfg)(struct net_device *, int, u8);
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/* DCBX configuration */
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u8 (*getdcbx)(struct net_device *);
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u8 (*setdcbx)(struct net_device *, u8);
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/* peer apps */
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int (*peer_getappinfo)(struct net_device *, struct dcb_peer_app_info *,
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u16 *);
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int (*peer_getapptable)(struct net_device *, struct dcb_app *);
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/* CEE peer */
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int (*cee_peer_getpg) (struct net_device *, struct cee_pg *);
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int (*cee_peer_getpfc) (struct net_device *, struct cee_pfc *);
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/* buffer settings */
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int (*dcbnl_getbuffer)(struct net_device *, struct dcbnl_buffer *);
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int (*dcbnl_setbuffer)(struct net_device *, struct dcbnl_buffer *);
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};
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#endif /* __NET_DCBNL_H__ */
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