1 /*
2  * Copyright (c) 2006-2008 Chelsio, Inc. All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and/or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  */
32 #ifndef _CHELSIO_DEFS_H
33 #define _CHELSIO_DEFS_H
34 
35 #include <linux/skbuff.h>
36 #include <net/tcp.h>
37 
38 #include "t3cdev.h"
39 
40 #include "cxgb3_offload.h"
41 
42 #define VALIDATE_TID 1
43 
44 /*
45  * Map an ATID or STID to their entries in the corresponding TID tables.
46  */
47 static inline union active_open_entry *atid2entry(const struct tid_info *t,
48 						  unsigned int atid)
49 {
50 	return &t->atid_tab[atid - t->atid_base];
51 }
52 
53 static inline union listen_entry *stid2entry(const struct tid_info *t,
54 					     unsigned int stid)
55 {
56 	return &t->stid_tab[stid - t->stid_base];
57 }
58 
59 /*
60  * Find the connection corresponding to a TID.
61  */
62 static inline struct t3c_tid_entry *lookup_tid(const struct tid_info *t,
63 					       unsigned int tid)
64 {
65 	struct t3c_tid_entry *t3c_tid = tid < t->ntids ?
66 	    &(t->tid_tab[tid]) : NULL;
67 
68 	return (t3c_tid && t3c_tid->client) ? t3c_tid : NULL;
69 }
70 
71 /*
72  * Find the connection corresponding to a server TID.
73  */
74 static inline struct t3c_tid_entry *lookup_stid(const struct tid_info *t,
75 						unsigned int tid)
76 {
77 	union listen_entry *e;
78 
79 	if (tid < t->stid_base || tid >= t->stid_base + t->nstids)
80 		return NULL;
81 
82 	e = stid2entry(t, tid);
83 	if ((void *)e->next >= (void *)t->tid_tab &&
84 	    (void *)e->next < (void *)&t->atid_tab[t->natids])
85 		return NULL;
86 
87 	return &e->t3c_tid;
88 }
89 
90 /*
91  * Find the connection corresponding to an active-open TID.
92  */
93 static inline struct t3c_tid_entry *lookup_atid(const struct tid_info *t,
94 						unsigned int tid)
95 {
96 	union active_open_entry *e;
97 
98 	if (tid < t->atid_base || tid >= t->atid_base + t->natids)
99 		return NULL;
100 
101 	e = atid2entry(t, tid);
102 	if ((void *)e->next >= (void *)t->tid_tab &&
103 	    (void *)e->next < (void *)&t->atid_tab[t->natids])
104 		return NULL;
105 
106 	return &e->t3c_tid;
107 }
108 
109 int attach_t3cdev(struct t3cdev *dev);
110 void detach_t3cdev(struct t3cdev *dev);
111 #endif
112