cxgb_offload.h revision 237263 
1/**************************************************************************
2
3Copyright (c) 2007-2008, Chelsio Inc.
4All rights reserved.
5
6Redistribution and use in source and binary forms, with or without
7modification, are permitted provided that the following conditions are met:
8
9 1. Redistributions of source code must retain the above copyright notice,
10    this list of conditions and the following disclaimer.
11
12 2. Neither the name of the Chelsio Corporation nor the names of its
13    contributors may be used to endorse or promote products derived from
14    this software without specific prior written permission.
15
16THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26POSSIBILITY OF SUCH DAMAGE.
27
28$FreeBSD: head/sys/dev/cxgb/cxgb_offload.h 237263 2012-06-19 07:34:13Z np $
29
30***************************************************************************/
31
32#ifndef _CXGB_OFFLOAD_H
33#define _CXGB_OFFLOAD_H
34
35#ifdef TCP_OFFLOAD
36enum {
37	ULD_TOM = 1,
38	ULD_IWARP = 2,
39};
40
41struct adapter;
42struct uld_info {
43	SLIST_ENTRY(uld_info) link;
44	int refcount;
45	int uld_id;
46	int (*activate)(struct adapter *);
47	int (*deactivate)(struct adapter *);
48};
49
50struct tom_tunables {
51	int sndbuf;
52	int ddp;
53	int indsz;
54	int ddp_thres;
55};
56
57/* CPL message priority levels */
58enum {
59	CPL_PRIORITY_DATA = 0,     /* data messages */
60	CPL_PRIORITY_CONTROL = 1   /* offload control messages */
61};
62
63#define S_HDR_NDESC	0
64#define M_HDR_NDESC	0xf
65#define V_HDR_NDESC(x)	((x) << S_HDR_NDESC)
66#define G_HDR_NDESC(x)	(((x) >> S_HDR_NDESC) & M_HDR_NDESC)
67
68#define S_HDR_QSET	4
69#define M_HDR_QSET	0xf
70#define V_HDR_QSET(x)	((x) << S_HDR_QSET)
71#define G_HDR_QSET(x)	(((x) >> S_HDR_QSET) & M_HDR_QSET)
72
73#define S_HDR_CTRL	8
74#define V_HDR_CTRL(x)	((x) << S_HDR_CTRL)
75#define F_HDR_CTRL	V_HDR_CTRL(1U)
76
77#define S_HDR_DF	9
78#define V_HDR_DF(x)	((x) << S_HDR_DF)
79#define F_HDR_DF	V_HDR_DF(1U)
80
81#define S_HDR_SGL	10
82#define V_HDR_SGL(x)	((x) << S_HDR_SGL)
83#define F_HDR_SGL	V_HDR_SGL(1U)
84
85struct ofld_hdr
86{
87	void *sgl;	/* SGL, if F_HDR_SGL set in flags */
88	int plen;	/* amount of payload (in bytes) */
89	int flags;
90};
91
92/*
93 * Convenience function for fixed size CPLs that fit in 1 desc.
94 */
95#define M_GETHDR_OFLD(qset, ctrl, cpl) \
96    m_gethdr_ofld(qset, ctrl, sizeof(*cpl), (void **)&cpl)
97static inline struct mbuf *
98m_gethdr_ofld(int qset, int ctrl, int cpllen, void **cpl)
99{
100	struct mbuf *m;
101	struct ofld_hdr *oh;
102
103	m = m_gethdr(M_NOWAIT, MT_DATA);
104	if (m == NULL)
105		return (NULL);
106
107	oh = mtod(m, struct ofld_hdr *);
108	oh->flags = V_HDR_NDESC(1) | V_HDR_QSET(qset) | V_HDR_CTRL(ctrl);
109	*cpl = (void *)(oh + 1);
110	m->m_pkthdr.len = m->m_len = sizeof(*oh) + cpllen;
111
112	return (m);
113}
114
115int t3_register_uld(struct uld_info *);
116int t3_unregister_uld(struct uld_info *);
117int t3_activate_uld(struct adapter *, int);
118int t3_deactivate_uld(struct adapter *, int);
119#endif	/* TCP_OFFLOAD */
120
121#define CXGB_UNIMPLEMENTED() \
122    panic("IMPLEMENT: %s:%s:%d", __FUNCTION__, __FILE__, __LINE__)
123
124#endif
125