diff options
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbevf/ixgbevf.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 51 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbevf/vf.h | 9 |
3 files changed, 53 insertions, 8 deletions
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h b/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h index d4b1f50fb2a..a08bd7c4676 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h @@ -406,6 +406,7 @@ struct ixgbevf_adapter { u64 bp_tx_missed; #endif + u8 __iomem *io_addr; /* Mainly for iounmap use */ u32 link_speed; bool link_up; diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index 74df8bf8619..37c4ebe97bd 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -99,6 +99,48 @@ static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter); static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector); static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter); +static void ixgbevf_remove_adapter(struct ixgbe_hw *hw) +{ + struct ixgbevf_adapter *adapter = hw->back; + + if (!hw->hw_addr) + return; + hw->hw_addr = NULL; + dev_err(&adapter->pdev->dev, "Adapter removed\n"); +} + +static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg) +{ + u32 value; + + /* The following check not only optimizes a bit by not + * performing a read on the status register when the + * register just read was a status register read that + * returned IXGBE_FAILED_READ_REG. It also blocks any + * potential recursion. + */ + if (reg == IXGBE_VFSTATUS) { + ixgbevf_remove_adapter(hw); + return; + } + value = ixgbe_read_reg(hw, IXGBE_VFSTATUS); + if (value == IXGBE_FAILED_READ_REG) + ixgbevf_remove_adapter(hw); +} + +u32 ixgbe_read_reg(struct ixgbe_hw *hw, u32 reg) +{ + u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr); + u32 value; + + if (IXGBE_REMOVED(reg_addr)) + return IXGBE_FAILED_READ_REG; + value = readl(reg_addr + reg); + if (unlikely(value == IXGBE_FAILED_READ_REG)) + ixgbevf_check_remove(hw, reg); + return value; +} + static inline void ixgbevf_release_rx_desc(struct ixgbevf_ring *rx_ring, u32 val) { @@ -1139,7 +1181,7 @@ static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter, /* reset head and tail pointers */ IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0); IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0); - ring->tail = hw->hw_addr + IXGBE_VFTDT(reg_idx); + ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx); /* reset ntu and ntc to place SW in sync with hardwdare */ ring->next_to_clean = 0; @@ -1318,7 +1360,7 @@ static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter, /* reset head and tail pointers */ IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0); IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0); - ring->tail = hw->hw_addr + IXGBE_VFRDT(reg_idx); + ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx); /* reset ntu and ntc to place SW in sync with hardwdare */ ring->next_to_clean = 0; @@ -3459,6 +3501,7 @@ static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) hw->hw_addr = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); + adapter->io_addr = hw->hw_addr; if (!hw->hw_addr) { err = -EIO; goto err_ioremap; @@ -3544,7 +3587,7 @@ err_register: ixgbevf_clear_interrupt_scheme(adapter); err_sw_init: ixgbevf_reset_interrupt_capability(adapter); - iounmap(hw->hw_addr); + iounmap(adapter->io_addr); err_ioremap: free_netdev(netdev); err_alloc_etherdev: @@ -3582,7 +3625,7 @@ static void ixgbevf_remove(struct pci_dev *pdev) ixgbevf_clear_interrupt_scheme(adapter); ixgbevf_reset_interrupt_capability(adapter); - iounmap(adapter->hw.hw_addr); + iounmap(adapter->io_addr); pci_release_regions(pdev); hw_dbg(&adapter->hw, "Remove complete\n"); diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.h b/drivers/net/ethernet/intel/ixgbevf/vf.h index 8ebed729c70..7cb1a520e56 100644 --- a/drivers/net/ethernet/intel/ixgbevf/vf.h +++ b/drivers/net/ethernet/intel/ixgbevf/vf.h @@ -172,16 +172,17 @@ struct ixgbevf_info { const struct ixgbe_mac_operations *mac_ops; }; +#define IXGBE_FAILED_READ_REG 0xffffffffU + +#define IXGBE_REMOVED(a) unlikely(!(a)) + static inline void ixgbe_write_reg(struct ixgbe_hw *hw, u32 reg, u32 value) { writel(value, hw->hw_addr + reg); } #define IXGBE_WRITE_REG(h, r, v) ixgbe_write_reg(h, r, v) -static inline u32 ixgbe_read_reg(struct ixgbe_hw *hw, u32 reg) -{ - return readl(hw->hw_addr + reg); -} +u32 ixgbe_read_reg(struct ixgbe_hw *hw, u32 reg); #define IXGBE_READ_REG(h, r) ixgbe_read_reg(h, r) static inline void ixgbe_write_reg_array(struct ixgbe_hw *hw, u32 reg, |