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author | Kumar Sanghvi <kumaras@chelsio.com> | 2014-03-13 15:20:49 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2014-03-13 18:36:05 (GMT) |
commit | c2b955e0063411826d2c4540c96a8f2c4e1c2cb0 (patch) | |
tree | 0d650c1b877d0f86d90dd907e19d9af831456d07 /drivers/net/ethernet/chelsio/cxgb4/sge.c | |
parent | 0f4d201f74f0d4f1f88c367185591195c8151e9c (diff) | |
download | linux-c2b955e0063411826d2c4540c96a8f2c4e1c2cb0.tar.xz |
cxgb4: Updates for T5 SGE's Egress Congestion Threshold
Based on original work by Casey Leedom <leedom@chelsio.com>
Signed-off-by: Kumar Sanghvi <kumaras@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 | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c index 054bb03..a7c56b3 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/sge.c +++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c @@ -2776,8 +2776,8 @@ static int t4_sge_init_hard(struct adapter *adap) int t4_sge_init(struct adapter *adap) { struct sge *s = &adap->sge; - u32 sge_control; - int ret; + u32 sge_control, sge_conm_ctrl; + int ret, egress_threshold; /* * Ingress Padding Boundary and Egress Status Page Size are set up by @@ -2802,10 +2802,18 @@ int t4_sge_init(struct adapter *adap) * SGE's Egress Congestion Threshold. If it isn't, then we can get * stuck waiting for new packets while the SGE is waiting for us to * give it more Free List entries. (Note that the SGE's Egress - * Congestion Threshold is in units of 2 Free List pointers.) + * Congestion Threshold is in units of 2 Free List pointers.) For T4, + * there was only a single field to control this. For T5 there's the + * original field which now only applies to Unpacked Mode Free List + * buffers and a new field which only applies to Packed Mode Free List + * buffers. */ - s->fl_starve_thres - = EGRTHRESHOLD_GET(t4_read_reg(adap, SGE_CONM_CTRL))*2 + 1; + sge_conm_ctrl = t4_read_reg(adap, SGE_CONM_CTRL); + if (is_t4(adap->params.chip)) + egress_threshold = EGRTHRESHOLD_GET(sge_conm_ctrl); + else + egress_threshold = EGRTHRESHOLDPACKING_GET(sge_conm_ctrl); + s->fl_starve_thres = 2*egress_threshold + 1; setup_timer(&s->rx_timer, sge_rx_timer_cb, (unsigned long)adap); setup_timer(&s->tx_timer, sge_tx_timer_cb, (unsigned long)adap); |