diff options
Diffstat (limited to 'drivers/net/cxgb3/l2t.h')
| -rw-r--r-- | drivers/net/cxgb3/l2t.h | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/drivers/net/cxgb3/l2t.h b/drivers/net/cxgb3/l2t.h deleted file mode 100644 index 7a12d52ed4fc..000000000000 --- a/drivers/net/cxgb3/l2t.h +++ /dev/null @@ -1,141 +0,0 @@ -/* - * Copyright (c) 2003-2008 Chelsio, Inc. All rights reserved. - * - * This software is available to you under a choice of one of two - * licenses. You may choose to be licensed under the terms of the GNU - * General Public License (GPL) Version 2, available from the file - * COPYING in the main directory of this source tree, or the - * OpenIB.org BSD license below: - * - * Redistribution and use in source and binary forms, with or - * without modification, are permitted provided that the following - * conditions are met: - * - * - Redistributions of source code must retain the above - * copyright notice, this list of conditions and the following - * disclaimer. - * - * - Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following - * disclaimer in the documentation and/or other materials - * provided with the distribution. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ -#ifndef _CHELSIO_L2T_H -#define _CHELSIO_L2T_H - -#include <linux/spinlock.h> -#include "t3cdev.h" -#include <linux/atomic.h> - -enum { - L2T_STATE_VALID, /* entry is up to date */ - L2T_STATE_STALE, /* entry may be used but needs revalidation */ - L2T_STATE_RESOLVING, /* entry needs address resolution */ - L2T_STATE_UNUSED /* entry not in use */ -}; - -struct neighbour; -struct sk_buff; - -/* - * Each L2T entry plays multiple roles. First of all, it keeps state for the - * corresponding entry of the HW L2 table and maintains a queue of offload - * packets awaiting address resolution. Second, it is a node of a hash table - * chain, where the nodes of the chain are linked together through their next - * pointer. Finally, each node is a bucket of a hash table, pointing to the - * first element in its chain through its first pointer. - */ -struct l2t_entry { - u16 state; /* entry state */ - u16 idx; /* entry index */ - u32 addr; /* dest IP address */ - int ifindex; /* neighbor's net_device's ifindex */ - u16 smt_idx; /* SMT index */ - u16 vlan; /* VLAN TCI (id: bits 0-11, prio: 13-15 */ - struct neighbour *neigh; /* associated neighbour */ - struct l2t_entry *first; /* start of hash chain */ - struct l2t_entry *next; /* next l2t_entry on chain */ - struct sk_buff_head arpq; /* queue of packets awaiting resolution */ - spinlock_t lock; - atomic_t refcnt; /* entry reference count */ - u8 dmac[6]; /* neighbour's MAC address */ -}; - -struct l2t_data { - unsigned int nentries; /* number of entries */ - struct l2t_entry *rover; /* starting point for next allocation */ - atomic_t nfree; /* number of free entries */ - rwlock_t lock; - struct l2t_entry l2tab[0]; -}; - -typedef void (*arp_failure_handler_func)(struct t3cdev * dev, - struct sk_buff * skb); - -/* - * Callback stored in an skb to handle address resolution failure. - */ -struct l2t_skb_cb { - arp_failure_handler_func arp_failure_handler; -}; - -#define L2T_SKB_CB(skb) ((struct l2t_skb_cb *)(skb)->cb) - -static inline void set_arp_failure_handler(struct sk_buff *skb, - arp_failure_handler_func hnd) -{ - L2T_SKB_CB(skb)->arp_failure_handler = hnd; -} - -/* - * Getting to the L2 data from an offload device. - */ -#define L2DATA(dev) ((dev)->l2opt) - -#define W_TCB_L2T_IX 0 -#define S_TCB_L2T_IX 7 -#define M_TCB_L2T_IX 0x7ffULL -#define V_TCB_L2T_IX(x) ((x) << S_TCB_L2T_IX) - -void t3_l2e_free(struct l2t_data *d, struct l2t_entry *e); -void t3_l2t_update(struct t3cdev *dev, struct neighbour *neigh); -struct l2t_entry *t3_l2t_get(struct t3cdev *cdev, struct neighbour *neigh, - struct net_device *dev); -int t3_l2t_send_slow(struct t3cdev *dev, struct sk_buff *skb, - struct l2t_entry *e); -void t3_l2t_send_event(struct t3cdev *dev, struct l2t_entry *e); -struct l2t_data *t3_init_l2t(unsigned int l2t_capacity); -void t3_free_l2t(struct l2t_data *d); - -int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb); - -static inline int l2t_send(struct t3cdev *dev, struct sk_buff *skb, - struct l2t_entry *e) -{ - if (likely(e->state == L2T_STATE_VALID)) - return cxgb3_ofld_send(dev, skb); - return t3_l2t_send_slow(dev, skb, e); -} - -static inline void l2t_release(struct l2t_data *d, struct l2t_entry *e) -{ - if (atomic_dec_and_test(&e->refcnt)) - t3_l2e_free(d, e); -} - -static inline void l2t_hold(struct l2t_data *d, struct l2t_entry *e) -{ - if (atomic_add_return(1, &e->refcnt) == 1) /* 0 -> 1 transition */ - atomic_dec(&d->nfree); -} - -#endif |