Commit 57e81d44 authored by Sunil Goutham's avatar Sunil Goutham Committed by David S. Miller

net: thunderx: Fix for HW issue while padding TSO packet

There is a issue in HW where-in while sending GSO sized pkts
as part of TSO, if pkt len falls below configured min packet
size i.e 60, NIC will zero PAD packet and also updates IP total length.
Hence set this value to lessthan min pkt size of MAC + IP + TCP
headers, BGX will anyway do the padding to transmit 64 byte pkt
including FCS.
Signed-off-by: default avatarSunil Goutham <sgoutham@cavium.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a036244c
...@@ -251,9 +251,14 @@ static void nic_set_tx_pkt_pad(struct nicpf *nic, int size) ...@@ -251,9 +251,14 @@ static void nic_set_tx_pkt_pad(struct nicpf *nic, int size)
int lmac; int lmac;
u64 lmac_cfg; u64 lmac_cfg;
/* Max value that can be set is 60 */ /* There is a issue in HW where-in while sending GSO sized
if (size > 60) * pkts as part of TSO, if pkt len falls below this size
size = 60; * NIC will zero PAD packet and also updates IP total length.
* Hence set this value to lessthan min pkt size of MAC+IP+TCP
* headers, BGX will do the padding to transmit 64 byte pkt.
*/
if (size > 52)
size = 52;
for (lmac = 0; lmac < (MAX_BGX_PER_CN88XX * MAX_LMAC_PER_BGX); lmac++) { for (lmac = 0; lmac < (MAX_BGX_PER_CN88XX * MAX_LMAC_PER_BGX); lmac++) {
lmac_cfg = nic_reg_read(nic, NIC_PF_LMAC_0_7_CFG | (lmac << 3)); lmac_cfg = nic_reg_read(nic, NIC_PF_LMAC_0_7_CFG | (lmac << 3));
......
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