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net: stmmac: xgmac: Remove uneeded computation for RFA/RFD 

RFA and RFD should not be dependent on FIFO size. In fact, the more FIFO
space we have, the later we can activate Flow Control. Let's use
hard-coded values for RFA and RFD for all FIFO sizes with the exception
of 4k, which is a special case.

Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jose Abreu 2019-11-14 12:42:48 +01:00 committed by David S. Miller
parent 854248e5ec
commit 52f96cd135
1 changed files with 2 additions and 12 deletions
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14
drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
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@ -183,19 +183,9 @@ static void dwxgmac2_dma_rx_mode(void __iomem *ioaddr, int mode,
rfa = 0x01; /* Full-1.5K */
break;
case 8192:
rfd = 0x06; /* Full-4K */
rfa = 0x0a; /* Full-6K */
break;
case 16384:
rfd = 0x06; /* Full-4K */
rfa = 0x12; /* Full-10K */
break;
default:
rfd = 0x06; /* Full-4K */
rfa = 0x1e; /* Full-16K */
rfd = 0x07; /* Full-4.5K */
rfa = 0x04; /* Full-3K */
break;
}