diff options
| author | Hariprasad Shenai <hariprasad@chelsio.com> | 2015-05-05 12:29:51 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-06 02:31:48 +0300 |
| commit | 1343299727e99230156ddb0dbac0f84e8e0a1d1e (patch) | |
| tree | 06d5b508cb6cb09db9d8ec8050f70cb1442cded9 /drivers/net/ethernet/chelsio/cxgb4/sge.c | |
| parent | 6decd63acacb3b8de81ccc435cf9acea8b6bdfeb (diff) | |
| download | linux-1343299727e99230156ddb0dbac0f84e8e0a1d1e.tar.xz | |
cxgb4: Make sure that Freelist size is larger than Egress Congestion Threshold
We need to make sure that the Free List Size, in pointers, is at
least 2 Egress Queue Units (8 pointers/each) larger than the SGE's Egress
Congestion Threshold (in pointers).
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/chelsio/cxgb4/sge.c')
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb4/sge.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c index 0d2eddab04ef..517d5b4ea11b 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/sge.c +++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c @@ -2473,6 +2473,15 @@ int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq, c.iqaddr = cpu_to_be64(iq->phys_addr); if (fl) { + /* Allocate the ring for the hardware free list (with space + * for its status page) along with the associated software + * descriptor ring. The free list size needs to be a multiple + * of the Egress Queue Unit and at least 2 Egress Units larger + * than the SGE's Egress Congrestion Threshold + * (fl_starve_thres - 1). + */ + if (fl->size < s->fl_starve_thres - 1 + 2 * 8) + fl->size = s->fl_starve_thres - 1 + 2 * 8; fl->size = roundup(fl->size, 8); fl->desc = alloc_ring(adap->pdev_dev, fl->size, sizeof(__be64), sizeof(struct rx_sw_desc), &fl->addr, |