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128 lines
5.0 KiB
128 lines
5.0 KiB
/* |
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* This file is part of the Chelsio T4 Ethernet driver for Linux. |
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* |
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* Copyright (c) 2003-2014 Chelsio Communications, Inc. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenIB.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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#ifndef __CXGB4_L2T_H |
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#define __CXGB4_L2T_H |
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#include <linux/spinlock.h> |
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#include <linux/if_ether.h> |
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#include <linux/atomic.h> |
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#define VLAN_NONE 0xfff |
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enum { L2T_SIZE = 4096 }; /* # of L2T entries */ |
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enum { |
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L2T_STATE_VALID, /* entry is up to date */ |
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L2T_STATE_STALE, /* entry may be used but needs revalidation */ |
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L2T_STATE_RESOLVING, /* entry needs address resolution */ |
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L2T_STATE_SYNC_WRITE, /* synchronous write of entry underway */ |
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L2T_STATE_NOARP, /* Netdev down or removed*/ |
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/* when state is one of the below the entry is not hashed */ |
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L2T_STATE_SWITCHING, /* entry is being used by a switching filter */ |
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L2T_STATE_UNUSED /* entry not in use */ |
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}; |
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struct adapter; |
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struct l2t_data; |
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struct neighbour; |
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struct net_device; |
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struct file_operations; |
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struct cpl_l2t_write_rpl; |
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/* |
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* Each L2T entry plays multiple roles. First of all, it keeps state for the |
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* corresponding entry of the HW L2 table and maintains a queue of offload |
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* packets awaiting address resolution. Second, it is a node of a hash table |
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* chain, where the nodes of the chain are linked together through their next |
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* pointer. Finally, each node is a bucket of a hash table, pointing to the |
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* first element in its chain through its first pointer. |
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*/ |
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struct l2t_entry { |
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u16 state; /* entry state */ |
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u16 idx; /* entry index within in-memory table */ |
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u32 addr[4]; /* next hop IP or IPv6 address */ |
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int ifindex; /* neighbor's net_device's ifindex */ |
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struct neighbour *neigh; /* associated neighbour */ |
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struct l2t_entry *first; /* start of hash chain */ |
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struct l2t_entry *next; /* next l2t_entry on chain */ |
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struct sk_buff_head arpq; /* packet queue awaiting resolution */ |
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spinlock_t lock; |
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atomic_t refcnt; /* entry reference count */ |
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u16 hash; /* hash bucket the entry is on */ |
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u16 vlan; /* VLAN TCI (id: bits 0-11, prio: 13-15 */ |
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u8 v6; /* whether entry is for IPv6 */ |
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u8 lport; /* associated offload logical interface */ |
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u8 dmac[ETH_ALEN]; /* neighbour's MAC address */ |
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}; |
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typedef void (*arp_err_handler_t)(void *handle, struct sk_buff *skb); |
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/* |
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* Callback stored in an skb to handle address resolution failure. |
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*/ |
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struct l2t_skb_cb { |
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void *handle; |
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arp_err_handler_t arp_err_handler; |
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}; |
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#define L2T_SKB_CB(skb) ((struct l2t_skb_cb *)(skb)->cb) |
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static inline void t4_set_arp_err_handler(struct sk_buff *skb, void *handle, |
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arp_err_handler_t handler) |
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{ |
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L2T_SKB_CB(skb)->handle = handle; |
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L2T_SKB_CB(skb)->arp_err_handler = handler; |
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} |
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void cxgb4_l2t_release(struct l2t_entry *e); |
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int cxgb4_l2t_send(struct net_device *dev, struct sk_buff *skb, |
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struct l2t_entry *e); |
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struct l2t_entry *cxgb4_l2t_get(struct l2t_data *d, struct neighbour *neigh, |
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const struct net_device *physdev, |
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unsigned int priority); |
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u64 cxgb4_select_ntuple(struct net_device *dev, |
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const struct l2t_entry *l2t); |
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struct l2t_entry *cxgb4_l2t_alloc_switching(struct net_device *dev, u16 vlan, |
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u8 port, u8 *dmac); |
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void t4_l2t_update(struct adapter *adap, struct neighbour *neigh); |
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struct l2t_entry *t4_l2t_alloc_switching(struct adapter *adap, u16 vlan, |
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u8 port, u8 *dmac); |
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struct l2t_data *t4_init_l2t(unsigned int l2t_start, unsigned int l2t_end); |
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void do_l2t_write_rpl(struct adapter *p, const struct cpl_l2t_write_rpl *rpl); |
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bool cxgb4_check_l2t_valid(struct l2t_entry *e); |
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extern const struct file_operations t4_l2t_fops; |
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#endif /* __CXGB4_L2T_H */
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