[v2,net-next,3/7] net: stmmac: gmac4+: Remove uneeded computation for RFA/RFD
diff mbox series

Message ID 5d366123e4216001e5e7069e74e1810c9a8c7b45.1573731453.git.Jose.Abreu@synopsys.com
State Mainlined
Commit 854248e5ec810afe2c3dcf017bb76b7224b97c47
Headers show
Series
  • net: stmmac: CPU Performance Improvements
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Commit Message

Jose Abreu Nov. 14, 2019, 11:42 a.m. UTC
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>

---
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: netdev@vger.kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

Patch
diff mbox series

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
index 36a0af8bf89f..c15409030710 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
@@ -252,19 +252,9 @@  static void dwmac4_dma_rx_chan_op_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;
 		}