diff options
author | Huang, Xiong <xiong@qca.qualcomm.com> | 2012-04-30 15:38:56 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2012-05-01 01:44:15 (GMT) |
commit | 5e5c0964d9b93debb040431b5036d28fe8b19136 (patch) | |
tree | d0fb8d55bb621b064b64d573c1aa7705365c75be /drivers/net/ethernet/atheros/atl1c/atl1c_main.c | |
parent | 0aa76ce3324e324d3091aef0c3e22c249ae4b693 (diff) | |
download | linux-fsl-qoriq-5e5c0964d9b93debb040431b5036d28fe8b19136.tar.xz |
atl1c: do MAC-reset when PHY link down
There may be tx-skbs still pending in HW when PHY link down.
Reset MAC will make the DMA engine go to the start point.
and release all pending skbs.
Note: Reset MAC will clear any interrupt status and mask.
Signed-off-by: xiong <xiong@qca.qualcomm.com>
Tested-by: Liu David <dwliu@qca.qualcomm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/atheros/atl1c/atl1c_main.c')
-rw-r--r-- | drivers/net/ethernet/atheros/atl1c/atl1c_main.c | 74 |
1 files changed, 47 insertions, 27 deletions
diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c index b95ef45..e6c62d0 100644 --- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c +++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c @@ -60,6 +60,10 @@ static void atl1c_clean_rx_irq(struct atl1c_adapter *adapter, int *work_done, int work_to_do); static int atl1c_up(struct atl1c_adapter *adapter); static void atl1c_down(struct atl1c_adapter *adapter); +static int atl1c_reset_mac(struct atl1c_hw *hw); +static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter); +static int atl1c_configure(struct atl1c_adapter *adapter); +static int atl1c_alloc_rx_buffer(struct atl1c_adapter *adapter); static const u16 atl1c_pay_load_size[] = { 128, 256, 512, 1024, 2048, 4096, @@ -256,14 +260,16 @@ static void atl1c_check_link_status(struct atl1c_adapter *adapter) if ((phy_data & BMSR_LSTATUS) == 0) { /* link down */ + netif_carrier_off(netdev); + netif_stop_queue(netdev); hw->hibernate = true; - if (atl1c_stop_mac(hw) != 0) + if (atl1c_reset_mac(hw) != 0) if (netif_msg_hw(adapter)) - dev_warn(&pdev->dev, "stop mac failed\n"); + dev_warn(&pdev->dev, "reset mac failed\n"); atl1c_set_aspm(hw, SPEED_0); atl1c_post_phy_linkchg(hw, SPEED_0); - netif_carrier_off(netdev); - netif_stop_queue(netdev); + atl1c_reset_dma_ring(adapter); + atl1c_configure(adapter); } else { /* Link Up */ hw->hibernate = false; @@ -341,8 +347,11 @@ static void atl1c_common_task(struct work_struct *work) } if (test_and_clear_bit(ATL1C_WORK_EVENT_LINK_CHANGE, - &adapter->work_event)) + &adapter->work_event)) { + atl1c_irq_disable(adapter); atl1c_check_link_status(adapter); + atl1c_irq_enable(adapter); + } } @@ -1230,9 +1239,6 @@ static int atl1c_reset_mac(struct atl1c_hw *hw) struct pci_dev *pdev = adapter->pdev; u32 ctrl_data = 0; - AT_WRITE_REG(hw, REG_IMR, 0); - AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT); - atl1c_stop_mac(hw); /* * Issue Soft Reset to the MAC. This will reset the chip's @@ -1371,7 +1377,7 @@ static void atl1c_set_aspm(struct atl1c_hw *hw, u16 link_speed) * * Configure the Tx /Rx unit of the MAC after a reset. */ -static int atl1c_configure(struct atl1c_adapter *adapter) +static int atl1c_configure_mac(struct atl1c_adapter *adapter) { struct atl1c_hw *hw = &adapter->hw; u32 master_ctrl_data = 0; @@ -1434,6 +1440,25 @@ static int atl1c_configure(struct atl1c_adapter *adapter) return 0; } +static int atl1c_configure(struct atl1c_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + int num; + + atl1c_init_ring_ptrs(adapter); + atl1c_set_multi(netdev); + atl1c_restore_vlan(adapter); + + num = atl1c_alloc_rx_buffer(adapter); + if (unlikely(num == 0)) + return -ENOMEM; + + if (atl1c_configure_mac(adapter)) + return -EIO; + + return 0; +} + static void atl1c_update_hw_stats(struct atl1c_adapter *adapter) { u16 hw_reg_addr = 0; @@ -2194,41 +2219,38 @@ static int atl1c_request_irq(struct atl1c_adapter *adapter) return err; } + +static void atl1c_reset_dma_ring(struct atl1c_adapter *adapter) +{ + /* release tx-pending skbs and reset tx/rx ring index */ + atl1c_clean_tx_ring(adapter, atl1c_trans_normal); + atl1c_clean_tx_ring(adapter, atl1c_trans_high); + atl1c_clean_rx_ring(adapter); +} + static int atl1c_up(struct atl1c_adapter *adapter) { struct net_device *netdev = adapter->netdev; - int num; int err; netif_carrier_off(netdev); - atl1c_init_ring_ptrs(adapter); - atl1c_set_multi(netdev); - atl1c_restore_vlan(adapter); - num = atl1c_alloc_rx_buffer(adapter); - if (unlikely(num == 0)) { - err = -ENOMEM; - goto err_alloc_rx; - } - - if (atl1c_configure(adapter)) { - err = -EIO; + err = atl1c_configure(adapter); + if (unlikely(err)) goto err_up; - } err = atl1c_request_irq(adapter); if (unlikely(err)) goto err_up; + atl1c_check_link_status(adapter); clear_bit(__AT_DOWN, &adapter->flags); napi_enable(&adapter->napi); atl1c_irq_enable(adapter); - atl1c_check_link_status(adapter); netif_start_queue(netdev); return err; err_up: -err_alloc_rx: atl1c_clean_rx_ring(adapter); return err; } @@ -2254,9 +2276,7 @@ static void atl1c_down(struct atl1c_adapter *adapter) adapter->link_speed = SPEED_0; adapter->link_duplex = -1; - atl1c_clean_tx_ring(adapter, atl1c_trans_normal); - atl1c_clean_tx_ring(adapter, atl1c_trans_high); - atl1c_clean_rx_ring(adapter); + atl1c_reset_dma_ring(adapter); } /* |