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09fe63205c
- Stateful TCP offload drivers for Terminator 3 and 4 (T3 and T4) ASICs. These are available as t3_tom and t4_tom modules that augment cxgb(4) and cxgbe(4) respectively. The cxgb/cxgbe drivers continue to work as usual with or without these extra features. - iWARP driver for Terminator 3 ASIC (kernel verbs). T4 iWARP in the works and will follow soon. Build-tested with make universe. 30s overview ============ What interfaces support TCP offload? Look for TOE4 and/or TOE6 in the capabilities of an interface: # ifconfig -m | grep TOE Enable/disable TCP offload on an interface (just like any other ifnet capability): # ifconfig cxgbe0 toe # ifconfig cxgbe0 -toe Which connections are offloaded? Look for toe4 and/or toe6 in the output of netstat and sockstat: # netstat -np tcp | grep toe # sockstat -46c | grep toe Reviewed by: bz, gnn Sponsored by: Chelsio communications. MFC after: ~3 months (after 9.1, and after ensuring MFC is feasible)
125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
/**************************************************************************
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Copyright (c) 2007-2008, 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 _CXGB_OFFLOAD_H
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#define _CXGB_OFFLOAD_H
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#ifdef TCP_OFFLOAD
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enum {
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ULD_TOM = 1,
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ULD_IWARP = 2,
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};
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struct adapter;
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struct uld_info {
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SLIST_ENTRY(uld_info) link;
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int refcount;
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int uld_id;
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int (*activate)(struct adapter *);
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int (*deactivate)(struct adapter *);
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};
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struct tom_tunables {
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int sndbuf;
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int ddp;
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int indsz;
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int ddp_thres;
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};
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/* CPL message priority levels */
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enum {
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CPL_PRIORITY_DATA = 0, /* data messages */
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CPL_PRIORITY_CONTROL = 1 /* offload control messages */
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};
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#define S_HDR_NDESC 0
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#define M_HDR_NDESC 0xf
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#define V_HDR_NDESC(x) ((x) << S_HDR_NDESC)
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#define G_HDR_NDESC(x) (((x) >> S_HDR_NDESC) & M_HDR_NDESC)
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#define S_HDR_QSET 4
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#define M_HDR_QSET 0xf
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#define V_HDR_QSET(x) ((x) << S_HDR_QSET)
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#define G_HDR_QSET(x) (((x) >> S_HDR_QSET) & M_HDR_QSET)
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#define S_HDR_CTRL 8
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#define V_HDR_CTRL(x) ((x) << S_HDR_CTRL)
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#define F_HDR_CTRL V_HDR_CTRL(1U)
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#define S_HDR_DF 9
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#define V_HDR_DF(x) ((x) << S_HDR_DF)
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#define F_HDR_DF V_HDR_DF(1U)
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#define S_HDR_SGL 10
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#define V_HDR_SGL(x) ((x) << S_HDR_SGL)
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#define F_HDR_SGL V_HDR_SGL(1U)
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struct ofld_hdr
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{
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void *sgl; /* SGL, if F_HDR_SGL set in flags */
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int plen; /* amount of payload (in bytes) */
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int flags;
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};
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/*
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* Convenience function for fixed size CPLs that fit in 1 desc.
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*/
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#define M_GETHDR_OFLD(qset, ctrl, cpl) \
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m_gethdr_ofld(qset, ctrl, sizeof(*cpl), (void **)&cpl)
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static inline struct mbuf *
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m_gethdr_ofld(int qset, int ctrl, int cpllen, void **cpl)
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{
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struct mbuf *m;
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struct ofld_hdr *oh;
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m = m_gethdr(M_NOWAIT, MT_DATA);
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if (m == NULL)
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return (NULL);
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oh = mtod(m, struct ofld_hdr *);
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oh->flags = V_HDR_NDESC(1) | V_HDR_QSET(qset) | V_HDR_CTRL(ctrl);
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*cpl = (void *)(oh + 1);
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m->m_pkthdr.len = m->m_len = sizeof(*oh) + cpllen;
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return (m);
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}
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int t3_register_uld(struct uld_info *);
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int t3_unregister_uld(struct uld_info *);
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int t3_activate_uld(struct adapter *, int);
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int t3_deactivate_uld(struct adapter *, int);
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#endif /* TCP_OFFLOAD */
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#define CXGB_UNIMPLEMENTED() \
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panic("IMPLEMENT: %s:%s:%d", __FUNCTION__, __FILE__, __LINE__)
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#endif
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