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Message-ID: <20250703174242.3829277-8-anthony.l.nguyen@intel.com>
Date: Thu, 3 Jul 2025 10:42:34 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
kuba@...nel.org,
pabeni@...hat.com,
edumazet@...gle.com,
andrew+netdev@...n.ch,
netdev@...r.kernel.org
Cc: Tony Nguyen <anthony.l.nguyen@...el.com>,
jedrzej.jagielski@...el.com,
przemyslaw.kitszel@...el.com,
dawid.osuchowski@...el.com,
piotr.kwapulinski@...el.com,
marcin.szycik@...ux.intel.com,
horms@...nel.org,
Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>,
Rafal Romanowski <rafal.romanowski@...el.com>
Subject: [PATCH net-next 07/12] ixgbe: check for MDD events
From: Don Skidmore <donald.c.skidmore@...el.com>
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@...el.com>
Reviewed-by: Jedrzej Jagielski <jedrzej.jagielski@...el.com>
Reviewed-by: Marcin Szycik <marcin.szycik@...ux.intel.com>
Signed-off-by: Don Skidmore <donald.c.skidmore@...el.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
Reviewed-by: Simon Horman <horms@...nel.org>
Tested-by: Rafal Romanowski <rafal.romanowski@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 ++
.../net/ethernet/intel/ixgbe/ixgbe_sriov.c | 51 +++++++++++++++++++
.../net/ethernet/intel/ixgbe/ixgbe_sriov.h | 1 +
drivers/net/ethernet/intel/ixgbe/ixgbe_type.h | 2 +
4 files changed, 57 insertions(+)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 991cf24f3b9b..4db8e7136571 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -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);
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
index 0dbbd2befd4d..bd9a054d7d94 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
@@ -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 */
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
index 0690ecb8dfa3..bc4cab976bf9 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
@@ -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);
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index 2a25abc0b17a..89df6f462302 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -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)*/
--
2.47.1
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