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cxgbe(4): wait for the hardware to catch up before destroying a netmap txq.

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MFC after:	2 weeks
This commit is contained in:
np 2015-02-24 18:22:24 +00:00
parent e277fe83b3
commit 926d274250
1 changed files with 10 additions and 5 deletions
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15
sys/dev/cxgbe/t4_netmap.c
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@ -514,12 +514,17 @@ cxgbe_netmap_off(struct adapter *sc, struct port_info *pi, struct ifnet *ifp,
if_printf(ifp, "netmap disable_vi failed: %d\n", rc);
nm_clear_native_flags(na);
/*
* XXXNM: We need to make sure that the tx queues are quiet and won't
* request any more SGE_EGR_UPDATEs.
*/
for_each_nm_txq(pi, i, nm_txq) {
struct sge_qstat *spg = (void *)&nm_txq->desc[nm_txq->sidx];
/* Wait for hw pidx to catch up ... */
while (be16toh(nm_txq->pidx) != spg->pidx)
pause("nmpidx", 1);
/* ... and then for the cidx. */
while (spg->pidx != spg->cidx)
pause("nmcidx", 1);
free_nm_txq_hwq(pi, nm_txq);
}
for_each_nm_rxq(pi, i, nm_rxq) {