diff options
| author | Thierry Reding <treding@nvidia.com> | 2019-10-02 17:52:58 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-10-03 22:00:50 +0300 |
| commit | 560c07cba1319cf6765884ea9feedecf3020997d (patch) | |
| tree | a38525a56ca577384bec444d650bca9b1e1f623c /drivers/net/ethernet/stmicro/stmmac/dwmac4.h | |
| parent | 968a2978cb39a754750d35a47049781660682a31 (diff) | |
| download | linux-560c07cba1319cf6765884ea9feedecf3020997d.tar.xz | |
net: stmmac: Support enhanced addressing mode for DWMAC 4.10
The address width of the controller can be read from hardware feature
registers much like on XGMAC. Add support for parsing the ADDR64 field
so that the DMA mask can be set accordingly.
This avoids getting swiotlb involved for DMA on Tegra186 and later.
Also make sure that the upper 32 bits of the DMA address are written to
the DMA descriptors when enhanced addressing mode is used. Similarily,
for each channel, the upper 32 bits of the DMA descriptor ring's base
address also need to be programmed to make sure the correct memory can
be fetched when the DMA descriptor ring is located beyond the 32-bit
boundary.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/dwmac4.h')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwmac4.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h index 89a3420eba42..2fe45fa3c482 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h @@ -205,6 +205,7 @@ enum power_event { #define GMAC_HW_HASH_TB_SZ GENMASK(25, 24) #define GMAC_HW_FEAT_AVSEL BIT(20) #define GMAC_HW_TSOEN BIT(18) +#define GMAC_HW_ADDR64 GENMASK(15, 14) #define GMAC_HW_TXFIFOSIZE GENMASK(10, 6) #define GMAC_HW_RXFIFOSIZE GENMASK(4, 0) |