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Set an rx jumbo cluster to the correct size before

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using bus_dmamap_load_mbuf_sg() on it. This
prevents data corruption when the mxge MTU is
between 4076 and 8172 on machines with 4KB
pages and MXGE_VIRT_JUMBOS is in use (which it
isn't, in -current or -stable)
This commit is contained in:
Andrew Gallatin 2009-06-01 19:16:57 +00:00
parent a3f2e28dea
commit 4d9a5852aa
2 changed files with 4 additions and 1 deletions
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4
sys/dev/mxge/if_mxge.c
View File

@ -2351,7 +2351,7 @@ mxge_get_buf_big(struct mxge_slice_state *ss, bus_dmamap_t map, int idx)
err = ENOBUFS;
goto done;
}
m->m_len = rx->cl_size;
m->m_len = rx->mlen;
err = bus_dmamap_load_mbuf_sg(rx->dmat, map, m,
seg, &cnt, BUS_DMA_NOWAIT);
if (err != 0) {
@ -3432,6 +3432,8 @@ mxge_slice_open(struct mxge_slice_state *ss, int nbufs, int cl_size)
}
ss->rx_big.nbufs = nbufs;
ss->rx_big.cl_size = cl_size;
ss->rx_big.mlen = ss->sc->ifp->if_mtu + ETHER_HDR_LEN +
ETHER_VLAN_ENCAP_LEN + MXGEFW_PAD;
for (i = 0; i <= ss->rx_big.mask; i += ss->rx_big.nbufs) {
map = ss->rx_big.info[i].map;
err = mxge_get_buf_big(ss, map, i);

1
sys/dev/mxge/if_mxge_var.h
View File

@ -120,6 +120,7 @@ typedef struct
int cl_size;
int alloc_fail;
int mask; /* number of rx slots -1 */
int mlen;
} mxge_rx_ring_t;
typedef struct