net: stmmac: xgmac: Detect Hash Table size dinamically

Since commit b8ef7020d6e5 ("net: stmmac: add support for hash table size
128/256 in dwmac4"), we can detect the Hash Table dinamically.

Let's implement this feature in XGMAC cores and fix possible setups that
don't support the maximum size for Hash Table.

Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
index 5923ca6..f7eb06f 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
@@ -122,6 +122,7 @@
 #define XGMAC_HWFEAT_GMIISEL           BIT(1)
 #define XGMAC_HW_FEATURE1              0x00000120
 #define XGMAC_HWFEAT_L3L4FNUM          GENMASK(30, 27)
+#define XGMAC_HWFEAT_HASHTBLSZ         GENMASK(25, 24)
 #define XGMAC_HWFEAT_RSSEN             BIT(20)
 #define XGMAC_HWFEAT_TSOEN             BIT(18)
 #define XGMAC_HWFEAT_SPHEN             BIT(17)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
index 53c4a40..965cbe3 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
@@ -380,6 +380,7 @@ static void dwxgmac2_get_hw_feature(void __iomem *ioaddr,
        /* MAC HW feature 1 */
        hw_cap = readl(ioaddr + XGMAC_HW_FEATURE1);
        dma_cap->l3l4fnum = (hw_cap & XGMAC_HWFEAT_L3L4FNUM) >> 27;
+       dma_cap->hash_tb_sz = (hw_cap & XGMAC_HWFEAT_HASHTBLSZ) >> 24;
        dma_cap->rssen = (hw_cap & XGMAC_HWFEAT_RSSEN) >> 20;
        dma_cap->tsoen = (hw_cap & XGMAC_HWFEAT_TSOEN) >> 18;
        dma_cap->sphen = (hw_cap & XGMAC_HWFEAT_SPHEN) >> 17;