diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/defines.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/ich8lan.c | 28 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/ich8lan.h | 1 |
3 files changed, 30 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/defines.h b/drivers/net/ethernet/intel/e1000e/defines.h index a6aeb195390f..351c94a0cf74 100644 --- a/drivers/net/ethernet/intel/e1000e/defines.h +++ b/drivers/net/ethernet/intel/e1000e/defines.h @@ -236,6 +236,7 @@ #define E1000_STATUS_FUNC_SHIFT 2 #define E1000_STATUS_FUNC_1 0x00000004 /* Function 1 */ #define E1000_STATUS_TXOFF 0x00000010 /* transmission paused */ +#define E1000_STATUS_SPEED_MASK 0x000000C0 #define E1000_STATUS_SPEED_10 0x00000000 /* Speed 10Mb/s */ #define E1000_STATUS_SPEED_100 0x00000040 /* Speed 100Mb/s */ #define E1000_STATUS_SPEED_1000 0x00000080 /* Speed 1000Mb/s */ diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c index 1cdec5fd2129..4f2f0f69a48e 100644 --- a/drivers/net/ethernet/intel/e1000e/ich8lan.c +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c @@ -871,6 +871,34 @@ static s32 e1000_check_for_copper_link_ich8lan(struct e1000_hw *hw) return ret_val; } + /* When connected at 10Mbps half-duplex, 82579 parts are excessively + * aggressive resulting in many collisions. To avoid this, increase + * the IPG and reduce Rx latency in the PHY. + */ + if ((hw->mac.type == e1000_pch2lan) && link) { + u32 reg; + reg = er32(STATUS); + if (!(reg & (E1000_STATUS_FD | E1000_STATUS_SPEED_MASK))) { + reg = er32(TIPG); + reg &= ~E1000_TIPG_IPGT_MASK; + reg |= 0xFF; + ew32(TIPG, reg); + + /* Reduce Rx latency in analog PHY */ + ret_val = hw->phy.ops.acquire(hw); + if (ret_val) + return ret_val; + + ret_val = + e1000_write_emi_reg_locked(hw, I82579_RX_CONFIG, 0); + + hw->phy.ops.release(hw); + + if (ret_val) + return ret_val; + } + } + /* Work-around I218 hang issue */ if ((hw->adapter->pdev->device == E1000_DEV_ID_PCH_LPTLP_I218_LM) || (hw->adapter->pdev->device == E1000_DEV_ID_PCH_LPTLP_I218_V)) { diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.h b/drivers/net/ethernet/intel/e1000e/ich8lan.h index 8bf4655c2e17..00ba6c912cc8 100644 --- a/drivers/net/ethernet/intel/e1000e/ich8lan.h +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.h @@ -211,6 +211,7 @@ #define I82579_MSE_THRESHOLD 0x084F /* 82579 Mean Square Error Threshold */ #define I82577_MSE_THRESHOLD 0x0887 /* 82577 Mean Square Error Threshold */ #define I82579_MSE_LINK_DOWN 0x2411 /* MSE count before dropping link */ +#define I82579_RX_CONFIG 0x3412 /* Receive configuration */ #define I82579_EEE_PCS_STATUS 0x182D /* IEEE MMD Register 3.1 >> 8 */ #define I82579_EEE_CAPABILITY 0x0410 /* IEEE MMD Register 3.20 */ #define I82579_EEE_ADVERTISEMENT 0x040E /* IEEE MMD Register 7.60 */ |