PERFORCE change 135874 for review
Kip Macy
kmacy at FreeBSD.org
Thu Feb 21 06:25:45 UTC 2008
http://perforce.freebsd.org/chv.cgi?CH=135874
Change 135874 by kmacy at kmacy:entropy:iwarp on 2008/02/21 06:24:47
calculate the number of descriptors correctly for an offload request
Affected files ...
.. //depot/projects/iwarp/sys/dev/cxgb/cxgb_sge.c#14 edit
Differences ...
==== //depot/projects/iwarp/sys/dev/cxgb/cxgb_sge.c#14 (text+ko) ====
@@ -1945,18 +1945,25 @@
calc_tx_descs_ofld(struct mbuf *m, unsigned int nsegs)
{
unsigned int flits, cnt = 0;
+ int ndescs;
+ if (m->m_len <= WR_LEN && nsegs == 0)
+ return (1); /* packet fits as immediate data */
- if (m->m_len <= WR_LEN)
- return 1; /* packet fits as immediate data */
-
if (m->m_flags & M_IOVEC)
cnt = mtomv(m)->mv_count;
+ else
+ cnt = nsegs;
/* headers */
- flits = ((uint8_t *)m->m_pkthdr.header - mtod(m, uint8_t *)) / 8;
+ flits = m->m_len / 8;
+
+ ndescs = flits_to_desc(flits + sgl_len(cnt));
+
+ CTR4(KTR_CXGB, "flits=%d sgl_len=%d nsegs=%d ndescs=%d",
+ flits, sgl_len(cnt), nsegs, ndescs);
- return flits_to_desc(flits + sgl_len(cnt));
+ return (ndescs);
}
/**
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