diff options
author | jhb <jhb@FreeBSD.org> | 2008-01-17 23:37:47 +0000 |
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committer | jhb <jhb@FreeBSD.org> | 2008-01-17 23:37:47 +0000 |
commit | 4d2d2276c89d16d6686c32b709d17b5333f0c812 (patch) | |
tree | 6bf70a921cd833c0f3c1adc253928f44cb04943f /sys/dev/re | |
parent | 7e32513a5bd95aa6c5a6cf09ad0df8902f8b826f (diff) | |
download | FreeBSD-src-4d2d2276c89d16d6686c32b709d17b5333f0c812.zip FreeBSD-src-4d2d2276c89d16d6686c32b709d17b5333f0c812.tar.gz |
- Retire npe_defrag(), gem_defrag(), msk_defrag(), nfe_defrag(), and
re_defrag() and use m_collapse() instead.
- Replace a reference to ath_defrag() in a comment in if_wpi.c with
m_collapse().
Diffstat (limited to 'sys/dev/re')
-rw-r--r-- | sys/dev/re/if_re.c | 92 |
1 files changed, 1 insertions, 91 deletions
diff --git a/sys/dev/re/if_re.c b/sys/dev/re/if_re.c index 8379f6e..3ba66008 100644 --- a/sys/dev/re/if_re.c +++ b/sys/dev/re/if_re.c @@ -233,7 +233,6 @@ static int re_probe (device_t); static int re_attach (device_t); static int re_detach (device_t); -static struct mbuf *re_defrag (struct mbuf *, int, int); static int re_encap (struct rl_softc *, struct mbuf **); static void re_dma_map_addr (void *, bus_dma_segment_t *, int, int); @@ -2129,95 +2128,6 @@ re_int_task(arg, npending) return; } -/* - * It's copy of ath_defrag(ath(4)). - * - * Defragment an mbuf chain, returning at most maxfrags separate - * mbufs+clusters. If this is not possible NULL is returned and - * the original mbuf chain is left in it's present (potentially - * modified) state. We use two techniques: collapsing consecutive - * mbufs and replacing consecutive mbufs by a cluster. - */ -static struct mbuf * -re_defrag(m0, how, maxfrags) - struct mbuf *m0; - int how; - int maxfrags; -{ - struct mbuf *m, *n, *n2, **prev; - u_int curfrags; - - /* - * Calculate the current number of frags. - */ - curfrags = 0; - for (m = m0; m != NULL; m = m->m_next) - curfrags++; - /* - * First, try to collapse mbufs. Note that we always collapse - * towards the front so we don't need to deal with moving the - * pkthdr. This may be suboptimal if the first mbuf has much - * less data than the following. - */ - m = m0; -again: - for (;;) { - n = m->m_next; - if (n == NULL) - break; - if ((m->m_flags & M_RDONLY) == 0 && - n->m_len < M_TRAILINGSPACE(m)) { - bcopy(mtod(n, void *), mtod(m, char *) + m->m_len, - n->m_len); - m->m_len += n->m_len; - m->m_next = n->m_next; - m_free(n); - if (--curfrags <= maxfrags) - return (m0); - } else - m = n; - } - KASSERT(maxfrags > 1, - ("maxfrags %u, but normal collapse failed", maxfrags)); - /* - * Collapse consecutive mbufs to a cluster. - */ - prev = &m0->m_next; /* NB: not the first mbuf */ - while ((n = *prev) != NULL) { - if ((n2 = n->m_next) != NULL && - n->m_len + n2->m_len < MCLBYTES) { - m = m_getcl(how, MT_DATA, 0); - if (m == NULL) - goto bad; - bcopy(mtod(n, void *), mtod(m, void *), n->m_len); - bcopy(mtod(n2, void *), mtod(m, char *) + n->m_len, - n2->m_len); - m->m_len = n->m_len + n2->m_len; - m->m_next = n2->m_next; - *prev = m; - m_free(n); - m_free(n2); - if (--curfrags <= maxfrags) /* +1 cl -2 mbufs */ - return m0; - /* - * Still not there, try the normal collapse - * again before we allocate another cluster. - */ - goto again; - } - prev = &n->m_next; - } - /* - * No place where we can collapse to a cluster; punt. - * This can occur if, for example, you request 2 frags - * but the packet requires that both be clusters (we - * never reallocate the first mbuf to avoid moving the - * packet header). - */ -bad: - return (NULL); -} - static int re_encap(sc, m_head) struct rl_softc *sc; @@ -2290,7 +2200,7 @@ re_encap(sc, m_head) error = bus_dmamap_load_mbuf_sg(sc->rl_ldata.rl_tx_mtag, txd->tx_dmamap, *m_head, segs, &nsegs, BUS_DMA_NOWAIT); if (error == EFBIG) { - m_new = re_defrag(*m_head, M_DONTWAIT, RL_NTXSEGS); + m_new = m_collapse(*m_head, M_DONTWAIT, RL_NTXSEGS); if (m_new == NULL) { m_freem(*m_head); *m_head = NULL; |