diff options
| -rw-r--r-- | drivers/net/e1000e/82571.c | 12 | ||||
| -rw-r--r-- | drivers/net/e1000e/defines.h | 1 |
2 files changed, 13 insertions, 0 deletions
diff --git a/drivers/net/e1000e/82571.c b/drivers/net/e1000e/82571.c index 0890162953e..25f6bc94e69 100644 --- a/drivers/net/e1000e/82571.c +++ b/drivers/net/e1000e/82571.c @@ -980,6 +980,18 @@ static void e1000_initialize_hw_bits_82571(struct e1000_hw *hw) reg |= E1000_PBA_ECC_CORR_EN; ew32(PBA_ECC, reg); } + /* + * Workaround for hardware errata. + * Ensure that DMA Dynamic Clock gating is disabled on 82571 and 82572 + */ + + if ((hw->mac.type == e1000_82571) || + (hw->mac.type == e1000_82572)) { + reg = er32(CTRL_EXT); + reg &= ~E1000_CTRL_EXT_DMA_DYN_CLK_EN; + ew32(CTRL_EXT, reg); + } + /* PCI-Ex Control Registers */ if (hw->mac.type == e1000_82574) { diff --git a/drivers/net/e1000e/defines.h b/drivers/net/e1000e/defines.h index e6caf29d425..243aa499fe9 100644 --- a/drivers/net/e1000e/defines.h +++ b/drivers/net/e1000e/defines.h @@ -69,6 +69,7 @@ #define E1000_CTRL_EXT_SDP7_DATA 0x00000080 /* Value of SW Definable Pin 7 */ #define E1000_CTRL_EXT_EE_RST 0x00002000 /* Reinitialize from EEPROM */ #define E1000_CTRL_EXT_RO_DIS 0x00020000 /* Relaxed Ordering disable */ +#define E1000_CTRL_EXT_DMA_DYN_CLK_EN 0x00080000 /* DMA Dynamic Clock Gating */ #define E1000_CTRL_EXT_LINK_MODE_MASK 0x00C00000 #define E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES 0x00C00000 #define E1000_CTRL_EXT_EIAME 0x01000000 |