diff options
| -rw-r--r-- | drivers/net/igb/e1000_82575.c | 73 | ||||
| -rw-r--r-- | drivers/net/igb/e1000_82575.h | 2 | ||||
| -rw-r--r-- | drivers/net/igb/e1000_defines.h | 1 | ||||
| -rw-r--r-- | drivers/net/igb/igb_main.c | 3 |
4 files changed, 79 insertions, 0 deletions
diff --git a/drivers/net/igb/e1000_82575.c b/drivers/net/igb/e1000_82575.c index 84ef695ccaca..2c8b91060d98 100644 --- a/drivers/net/igb/e1000_82575.c +++ b/drivers/net/igb/e1000_82575.c @@ -1227,6 +1227,79 @@ static void igb_clear_hw_cntrs_82575(struct e1000_hw *hw) temp = rd32(E1000_SCVPC); } +/** + * igb_rx_fifo_flush_82575 - Clean rx fifo after RX enable + * @hw: pointer to the HW structure + * + * After rx enable if managability is enabled then there is likely some + * bad data at the start of the fifo and possibly in the DMA fifo. This + * function clears the fifos and flushes any packets that came in as rx was + * being enabled. + **/ +void igb_rx_fifo_flush_82575(struct e1000_hw *hw) +{ + u32 rctl, rlpml, rxdctl[4], rfctl, temp_rctl, rx_enabled; + int i, ms_wait; + + if (hw->mac.type != e1000_82575 || + !(rd32(E1000_MANC) & E1000_MANC_RCV_TCO_EN)) + return; + + /* Disable all RX queues */ + for (i = 0; i < 4; i++) { + rxdctl[i] = rd32(E1000_RXDCTL(i)); + wr32(E1000_RXDCTL(i), + rxdctl[i] & ~E1000_RXDCTL_QUEUE_ENABLE); + } + /* Poll all queues to verify they have shut down */ + for (ms_wait = 0; ms_wait < 10; ms_wait++) { + msleep(1); + rx_enabled = 0; + for (i = 0; i < 4; i++) + rx_enabled |= rd32(E1000_RXDCTL(i)); + if (!(rx_enabled & E1000_RXDCTL_QUEUE_ENABLE)) + break; + } + + if (ms_wait == 10) + hw_dbg("Queue disable timed out after 10ms\n"); + + /* Clear RLPML, RCTL.SBP, RFCTL.LEF, and set RCTL.LPE so that all + * incoming packets are rejected. Set enable and wait 2ms so that + * any packet that was coming in as RCTL.EN was set is flushed + */ + rfctl = rd32(E1000_RFCTL); + wr32(E1000_RFCTL, rfctl & ~E1000_RFCTL_LEF); + + rlpml = rd32(E1000_RLPML); + wr32(E1000_RLPML, 0); + + rctl = rd32(E1000_RCTL); + temp_rctl = rctl & ~(E1000_RCTL_EN | E1000_RCTL_SBP); + temp_rctl |= E1000_RCTL_LPE; + + wr32(E1000_RCTL, temp_rctl); + wr32(E1000_RCTL, temp_rctl | E1000_RCTL_EN); + wrfl(); + msleep(2); + + /* Enable RX queues that were previously enabled and restore our + * previous state + */ + for (i = 0; i < 4; i++) + wr32(E1000_RXDCTL(i), rxdctl[i]); + wr32(E1000_RCTL, rctl); + wrfl(); + + wr32(E1000_RLPML, rlpml); + wr32(E1000_RFCTL, rfctl); + + /* Flush receive errors generated by workaround */ + rd32(E1000_ROC); + rd32(E1000_RNBC); + rd32(E1000_MPC); +} + static struct e1000_mac_operations e1000_mac_ops_82575 = { .reset_hw = igb_reset_hw_82575, .init_hw = igb_init_hw_82575, diff --git a/drivers/net/igb/e1000_82575.h b/drivers/net/igb/e1000_82575.h index 5fb79dd0e940..d78ad33d32bf 100644 --- a/drivers/net/igb/e1000_82575.h +++ b/drivers/net/igb/e1000_82575.h @@ -28,6 +28,8 @@ #ifndef _E1000_82575_H_ #define _E1000_82575_H_ +extern void igb_rx_fifo_flush_82575(struct e1000_hw *hw); + #define E1000_RAR_ENTRIES_82575 16 /* SRRCTL bit definitions */ diff --git a/drivers/net/igb/e1000_defines.h b/drivers/net/igb/e1000_defines.h index 1006d53fd688..ed748dcfb7a4 100644 --- a/drivers/net/igb/e1000_defines.h +++ b/drivers/net/igb/e1000_defines.h @@ -340,6 +340,7 @@ #define E1000_RXCSUM_PCSD 0x00002000 /* packet checksum disabled */ /* Header split receive */ +#define E1000_RFCTL_LEF 0x00040000 /* Collision related configuration parameters */ #define E1000_COLLISION_THRESHOLD 15 diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index d8bee212d61f..e5dff61f162e 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -630,6 +630,9 @@ static void igb_configure(struct igb_adapter *adapter) igb_configure_tx(adapter); igb_setup_rctl(adapter); igb_configure_rx(adapter); + + igb_rx_fifo_flush_82575(&adapter->hw); + /* call IGB_DESC_UNUSED which always leaves * at least 1 descriptor unused to make sure * next_to_use != next_to_clean */ |