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ixgbe: check for MDD events

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When an event is detected it is logged and, for the time being, the
queue is immediately re-enabled.  This is due to the lack of an API
to the hypervisor so it could deal with it as it chooses.

Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Reviewed-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Don Skidmore 2025-02-17 10:06:34 +01:00 committed by Tony Nguyen
parent d5e3152037
commit da3ab95f9b
4 changed files with 57 additions and 0 deletions
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3
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
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@ -7964,6 +7964,9 @@ static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
netif_carrier_on(netdev);
ixgbe_check_vf_rate_limit(adapter);
if (adapter->num_vfs && hw->mac.ops.enable_mdd)
hw->mac.ops.enable_mdd(hw);
/* enable transmits */
netif_tx_wake_all_queues(adapter->netdev);

51
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
View File

@ -207,6 +207,7 @@ void ixgbe_enable_sriov(struct ixgbe_adapter *adapter, unsigned int max_vfs)
int ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
{
unsigned int num_vfs = adapter->num_vfs, vf;
struct ixgbe_hw *hw = &adapter->hw;
unsigned long flags;
int rss;
@ -237,6 +238,9 @@ int ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
return 0;
if (hw->mac.ops.disable_mdd)
hw->mac.ops.disable_mdd(hw);
#ifdef CONFIG_PCI_IOV
/*
* If our VFs are assigned we cannot shut down SR-IOV
@ -1353,12 +1357,59 @@ static void ixgbe_rcv_ack_from_vf(struct ixgbe_adapter *adapter, u32 vf)
ixgbe_write_mbx(hw, &msg, 1, vf);
}
/**
* ixgbe_check_mdd_event - check for MDD event on all VFs
* @adapter: pointer to ixgbe adapter
*
* Return: true if there is a VF on which MDD event occurred, false otherwise.
*/
bool ixgbe_check_mdd_event(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
DECLARE_BITMAP(vf_bitmap, 64);
bool ret = false;
int i;
if (!hw->mac.ops.handle_mdd)
return false;
/* Did we have a malicious event */
bitmap_zero(vf_bitmap, 64);
hw->mac.ops.handle_mdd(hw, vf_bitmap);
/* Log any blocked queues and release lock */
for_each_set_bit(i, vf_bitmap, 64) {
dev_warn(&adapter->pdev->dev,
"Malicious event on VF %d tx:%x rx:%x\n", i,
IXGBE_READ_REG(hw, IXGBE_LVMMC_TX),
IXGBE_READ_REG(hw, IXGBE_LVMMC_RX));
if (hw->mac.ops.restore_mdd_vf) {
u32 ping;
hw->mac.ops.restore_mdd_vf(hw, i);
/* get the VF to rebuild its queues */
adapter->vfinfo[i].clear_to_send = 0;
ping = IXGBE_PF_CONTROL_MSG |
IXGBE_VT_MSGTYPE_CTS;
ixgbe_write_mbx(hw, &ping, 1, i);
}
ret = true;
}
return ret;
}
void ixgbe_msg_task(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
unsigned long flags;
u32 vf;
ixgbe_check_mdd_event(adapter);
spin_lock_irqsave(&adapter->vfs_lock, flags);
for (vf = 0; vf < adapter->num_vfs; vf++) {
/* process any reset requests */

1
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
View File

@ -15,6 +15,7 @@
#ifdef CONFIG_PCI_IOV
void ixgbe_restore_vf_multicasts(struct ixgbe_adapter *adapter);
#endif
bool ixgbe_check_mdd_event(struct ixgbe_adapter *adapter);
void ixgbe_msg_task(struct ixgbe_adapter *adapter);
int ixgbe_vf_configuration(struct pci_dev *pdev, unsigned int event_mask);
void ixgbe_ping_all_vfs(struct ixgbe_adapter *adapter);

2
drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
View File

@ -402,6 +402,8 @@ struct ixgbe_nvm_version {
#define IXGBE_MRCTL(_i) (0x0F600 + ((_i) * 4))
#define IXGBE_VMRVLAN(_i) (0x0F610 + ((_i) * 4))
#define IXGBE_VMRVM(_i) (0x0F630 + ((_i) * 4))
#define IXGBE_LVMMC_RX 0x2FA8
#define IXGBE_LVMMC_TX 0x8108
#define IXGBE_WQBR_RX(_i) (0x2FB0 + ((_i) * 4)) /* 4 total */
#define IXGBE_WQBR_TX(_i) (0x8130 + ((_i) * 4)) /* 4 total */
#define IXGBE_L34T_IMIR(_i) (0x0E800 + ((_i) * 4)) /*128 of these (0-127)*/