diff options
| author | Sunil Goutham <sgoutham@cavium.com> | 2016-02-24 12:10:50 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-02-25 22:25:34 +0100 |
| commit | 4c0b6eaf373a5323f03a3a20c42fc435715b073d (patch) | |
| tree | eb2225b50321dba238b886d27081e882811c75c3 /drivers/net/ethernet/cavium/thunder/nic.h | |
| parent | r8169:fix "rtl_counters_cond == 1 (loop: 1000, delay: 10)" log spam. (diff) | |
| download | linux-4c0b6eaf373a5323f03a3a20c42fc435715b073d.tar.xz linux-4c0b6eaf373a5323f03a3a20c42fc435715b073d.zip | |
net: thunderx: Fix for Qset error due to CQ full
On Thunderx pass 1.x and pass2 due to a HW errata default CQ
DROP_LEVEL of 0x80 is not sufficient to avoid CQ_WR_FULL Qset
error when packets are being received at >20Mpps resulting in
complete stall of packet reception.
This patch will configure it to 0x100 which is what is expected
by HW on Thunderx. On future passes of thunderx and other chips
HW default/reset value will be 0x100 or higher hence not overwritten.
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cavium/thunder/nic.h')
| -rw-r--r-- | drivers/net/ethernet/cavium/thunder/nic.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cavium/thunder/nic.h b/drivers/net/ethernet/cavium/thunder/nic.h index 688828865c48..34e9acea8747 100644 --- a/drivers/net/ethernet/cavium/thunder/nic.h +++ b/drivers/net/ethernet/cavium/thunder/nic.h @@ -116,6 +116,15 @@ #define NIC_PF_INTR_ID_MBOX0 8 #define NIC_PF_INTR_ID_MBOX1 9 +/* Minimum FIFO level before all packets for the CQ are dropped + * + * This value ensures that once a packet has been "accepted" + * for reception it will not get dropped due to non-availability + * of CQ descriptor. An errata in HW mandates this value to be + * atleast 0x100. + */ +#define NICPF_CQM_MIN_DROP_LEVEL 0x100 + /* Global timer for CQ timer thresh interrupts * Calculated for SCLK of 700Mhz * value written should be a 1/16th of what is expected |