d722cab49a
- upgrade to reflect state of 1.0.0.86
- move from firmware rev 3.2 to 4.0.0
- import driver bits for offload functionality
- remove binary distribution clause from top level files as it
runs counter to the intent of purely supporting the hardware
MFC after: 3 days
155 lines
5.2 KiB
C
155 lines
5.2 KiB
C
/**************************************************************************
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Copyright (c) 2007, Chelsio Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Neither the name of the Chelsio Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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$FreeBSD$
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***************************************************************************/
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#ifndef _CHELSIO_L2T_H
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#define _CHELSIO_L2T_H
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#include <dev/cxgb/ulp/toecore/toedev.h>
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#include <sys/lock.h>
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#include <sys/rwlock.h>
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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_UNUSED /* entry not in use */
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};
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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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uint16_t state; /* entry state */
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uint16_t idx; /* entry index */
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uint32_t addr; /* dest IP address */
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int ifindex; /* neighbor's net_device's ifindex */
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uint16_t smt_idx; /* SMT index */
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uint16_t vlan; /* VLAN TCI (id: bits 0-11, prio: 13-15 */
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struct rtentry *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 mbuf *arpq_head; /* queue of packets awaiting resolution */
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struct mbuf *arpq_tail;
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struct mtx lock;
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volatile uint32_t refcnt; /* entry reference count */
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uint8_t dmac[6]; /* neighbour's MAC address */
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#ifndef NETEVENT
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#ifdef CONFIG_CHELSIO_T3_MODULE
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struct timer_list update_timer;
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struct toedev *tdev;
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#endif
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#endif
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};
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struct l2t_data {
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unsigned int nentries; /* number of entries */
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struct l2t_entry *rover; /* starting point for next allocation */
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volatile uint32_t nfree; /* number of free entries */
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struct rwlock lock;
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struct l2t_entry l2tab[0];
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};
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typedef void (*arp_failure_handler_func)(struct toedev *dev,
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struct mbuf *m);
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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_mbuf_cb {
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arp_failure_handler_func arp_failure_handler;
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};
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/*
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* XXX
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*/
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#define L2T_MBUF_CB(skb) ((struct l2t_mbuf_cb *)(skb)->cb)
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static __inline void set_arp_failure_handler(struct mbuf *m,
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arp_failure_handler_func hnd)
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{
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#if 0
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L2T_SKB_CB(skb)->arp_failure_handler = hnd;
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#endif
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panic("implement me");
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}
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/*
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* Getting to the L2 data from an offload device.
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*/
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#define L2DATA(dev) ((dev)->l2opt)
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void t3_l2e_free(struct l2t_data *d, struct l2t_entry *e);
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void t3_l2t_update(struct toedev *dev, struct rtentry *ifp);
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struct l2t_entry *t3_l2t_get(struct toedev *dev, struct rtentry *neigh,
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unsigned int smt_idx);
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int t3_l2t_send_slow(struct toedev *dev, struct mbuf *m,
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struct l2t_entry *e);
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void t3_l2t_send_event(struct toedev *dev, struct l2t_entry *e);
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struct l2t_data *t3_init_l2t(unsigned int l2t_capacity);
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void t3_free_l2t(struct l2t_data *d);
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#ifdef CONFIG_PROC_FS
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int t3_l2t_proc_setup(struct proc_dir_entry *dir, struct l2t_data *d);
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void t3_l2t_proc_free(struct proc_dir_entry *dir);
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#else
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#define l2t_proc_setup(dir, d) 0
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#define l2t_proc_free(dir)
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#endif
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int cxgb_ofld_send(struct toedev *dev, struct mbuf *m);
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static inline int l2t_send(struct toedev *dev, struct mbuf *m,
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struct l2t_entry *e)
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{
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if (__predict_true(e->state == L2T_STATE_VALID))
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return cxgb_ofld_send(dev, m);
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return t3_l2t_send_slow(dev, m, e);
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}
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static inline void l2t_release(struct l2t_data *d, struct l2t_entry *e)
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{
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if (atomic_fetchadd_int(&e->refcnt, -1) == 1)
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t3_l2e_free(d, e);
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}
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static inline void l2t_hold(struct l2t_data *d, struct l2t_entry *e)
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{
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if (atomic_fetchadd_int(&e->refcnt, 1) == 1) /* 0 -> 1 transition */
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atomic_add_int(&d->nfree, 1);
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}
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#endif
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