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Date: Wed, 13 May 2015 13:00:13 +0530
From: Venkat Duvvuru <VenkatKumar.Duvvuru@...lex.com>
To: netdev@...r.kernel.org
Cc: Venkat Duvvuru <VenkatKumar.Duvvuru@...lex.com>
Subject: [PATCH net-next 2/3] be2net: Report a "link down" to the stack when a fatal error or fw reset happens.
When an error (related to HW or FW) is detected on a function, the driver
must pro-actively report a "link down" to the stack so that a possible
failover can be initiated. This is being done currently only for some
HW errors. This patch reports a "link down" even for fatal FW errors and
EEH errors.
Signed-off-by: Venkat Duvvuru <VenkatKumar.Duvvuru@...lex.com>
---
drivers/net/ethernet/emulex/benet/be.h | 31 +++++++++++++------
drivers/net/ethernet/emulex/benet/be_cmds.c | 10 +++---
drivers/net/ethernet/emulex/benet/be_main.c | 42 ++++++++++++++------------
3 files changed, 49 insertions(+), 34 deletions(-)
diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h
index c62a32f..63922d4 100644
--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -522,6 +522,7 @@ struct be_adapter {
u16 work_counter;
struct delayed_work be_err_detection_work;
+ u8 err_flags;
u32 flags;
u32 cmd_privileges;
/* Ethtool knobs and info */
@@ -781,26 +782,36 @@ static inline bool is_ipv4_pkt(struct sk_buff *skb)
return skb->protocol == htons(ETH_P_IP) && ip_hdr(skb)->version == 4;
}
-static inline bool be_multi_rxq(const struct be_adapter *adapter)
+#define BE_ERROR_EEH 1
+#define BE_ERROR_UE BIT(1)
+#define BE_ERROR_FW BIT(2)
+#define BE_ERROR_HW (BE_ERROR_EEH | BE_ERROR_UE)
+#define BE_ERROR_ANY (BE_ERROR_EEH | BE_ERROR_UE | BE_ERROR_FW)
+#define BE_CLEAR_ALL 0xFF
+
+static inline u8 be_check_error(struct be_adapter *adapter, u32 err_type)
{
- return adapter->num_rx_qs > 1;
+ return (adapter->err_flags & err_type);
}
-static inline bool be_error(struct be_adapter *adapter)
+static inline void be_set_error(struct be_adapter *adapter, int err_type)
{
- return adapter->eeh_error || adapter->hw_error || adapter->fw_timeout;
+ struct net_device *netdev = adapter->netdev;
+
+ adapter->err_flags |= err_type;
+ netif_carrier_off(netdev);
+
+ dev_info(&adapter->pdev->dev, "%s: Link down\n", netdev->name);
}
-static inline bool be_hw_error(struct be_adapter *adapter)
+static inline void be_clear_error(struct be_adapter *adapter, int err_type)
{
- return adapter->eeh_error || adapter->hw_error;
+ adapter->err_flags &= ~err_type;
}
-static inline void be_clear_all_error(struct be_adapter *adapter)
+static inline bool be_multi_rxq(const struct be_adapter *adapter)
{
- adapter->eeh_error = false;
- adapter->hw_error = false;
- adapter->fw_timeout = false;
+ return adapter->num_rx_qs > 1;
}
void be_cq_notify(struct be_adapter *adapter, u16 qid, bool arm,
diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.c b/drivers/net/ethernet/emulex/benet/be_cmds.c
index ecd92a0..dce8786 100644
--- a/drivers/net/ethernet/emulex/benet/be_cmds.c
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.c
@@ -93,7 +93,7 @@ static void be_mcc_notify(struct be_adapter *adapter)
struct be_queue_info *mccq = &adapter->mcc_obj.q;
u32 val = 0;
- if (be_error(adapter))
+ if (be_check_error(adapter, BE_ERROR_ANY))
return;
val |= mccq->id & DB_MCCQ_RING_ID_MASK;
@@ -489,7 +489,7 @@ static int be_mcc_wait_compl(struct be_adapter *adapter)
struct be_mcc_obj *mcc_obj = &adapter->mcc_obj;
for (i = 0; i < mcc_timeout; i++) {
- if (be_error(adapter))
+ if (be_check_error(adapter, BE_ERROR_ANY))
return -EIO;
local_bh_disable();
@@ -502,7 +502,7 @@ static int be_mcc_wait_compl(struct be_adapter *adapter)
}
if (i == mcc_timeout) {
dev_err(&adapter->pdev->dev, "FW not responding\n");
- adapter->fw_timeout = true;
+ be_set_error(adapter, BE_ERROR_FW);
return -EIO;
}
return status;
@@ -541,7 +541,7 @@ static int be_mbox_db_ready_wait(struct be_adapter *adapter, void __iomem *db)
u32 ready;
do {
- if (be_error(adapter))
+ if (be_check_error(adapter, BE_ERROR_ANY))
return -EIO;
ready = ioread32(db);
@@ -554,7 +554,7 @@ static int be_mbox_db_ready_wait(struct be_adapter *adapter, void __iomem *db)
if (msecs > 4000) {
dev_err(&adapter->pdev->dev, "FW not responding\n");
- adapter->fw_timeout = true;
+ be_set_error(adapter, BE_ERROR_FW);
be_detect_error(adapter);
return -1;
}
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index b4cea55..79fca82 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -179,7 +179,7 @@ static void be_intr_set(struct be_adapter *adapter, bool enable)
if (lancer_chip(adapter))
return;
- if (adapter->eeh_error)
+ if (be_check_error(adapter, BE_ERROR_EEH))
return;
status = be_cmd_intr_set(adapter, enable);
@@ -191,6 +191,9 @@ static void be_rxq_notify(struct be_adapter *adapter, u16 qid, u16 posted)
{
u32 val = 0;
+ if (be_check_error(adapter, BE_ERROR_HW))
+ return;
+
val |= qid & DB_RQ_RING_ID_MASK;
val |= posted << DB_RQ_NUM_POSTED_SHIFT;
@@ -203,6 +206,9 @@ static void be_txq_notify(struct be_adapter *adapter, struct be_tx_obj *txo,
{
u32 val = 0;
+ if (be_check_error(adapter, BE_ERROR_HW))
+ return;
+
val |= txo->q.id & DB_TXULP_RING_ID_MASK;
val |= (posted & DB_TXULP_NUM_POSTED_MASK) << DB_TXULP_NUM_POSTED_SHIFT;
@@ -219,7 +225,7 @@ static void be_eq_notify(struct be_adapter *adapter, u16 qid,
val |= qid & DB_EQ_RING_ID_MASK;
val |= ((qid & DB_EQ_RING_ID_EXT_MASK) << DB_EQ_RING_ID_EXT_MASK_SHIFT);
- if (adapter->eeh_error)
+ if (be_check_error(adapter, BE_ERROR_HW))
return;
if (arm)
@@ -240,7 +246,7 @@ void be_cq_notify(struct be_adapter *adapter, u16 qid, bool arm, u16 num_popped)
val |= ((qid & DB_CQ_RING_ID_EXT_MASK) <<
DB_CQ_RING_ID_EXT_MASK_SHIFT);
- if (adapter->eeh_error)
+ if (be_check_error(adapter, BE_ERROR_HW))
return;
if (arm)
@@ -2324,7 +2330,9 @@ static void be_rx_cq_clean(struct be_rx_obj *rxo)
if (lancer_chip(adapter))
break;
- if (flush_wait++ > 10 || be_hw_error(adapter)) {
+ if (flush_wait++ > 50 ||
+ be_check_error(adapter,
+ BE_ERROR_HW)) {
dev_warn(&adapter->pdev->dev,
"did not receive flush compl\n");
break;
@@ -2385,7 +2393,8 @@ static void be_tx_compl_clean(struct be_adapter *adapter)
pending_txqs--;
}
- if (pending_txqs == 0 || ++timeo > 10 || be_hw_error(adapter))
+ if (pending_txqs == 0 || ++timeo > 10 ||
+ be_check_error(adapter, BE_ERROR_HW))
break;
mdelay(1);
@@ -2995,22 +3004,19 @@ void be_detect_error(struct be_adapter *adapter)
u32 ue_lo = 0, ue_hi = 0, ue_lo_mask = 0, ue_hi_mask = 0;
u32 sliport_status = 0, sliport_err1 = 0, sliport_err2 = 0;
u32 i;
- bool error_detected = false;
struct device *dev = &adapter->pdev->dev;
- struct net_device *netdev = adapter->netdev;
- if (be_hw_error(adapter))
+ if (be_check_error(adapter, BE_ERROR_HW))
return;
if (lancer_chip(adapter)) {
sliport_status = ioread32(adapter->db + SLIPORT_STATUS_OFFSET);
if (sliport_status & SLIPORT_STATUS_ERR_MASK) {
+ be_set_error(adapter, BE_ERROR_UE);
sliport_err1 = ioread32(adapter->db +
SLIPORT_ERROR1_OFFSET);
sliport_err2 = ioread32(adapter->db +
SLIPORT_ERROR2_OFFSET);
- adapter->hw_error = true;
- error_detected = true;
/* Do not log error messages if its a FW reset */
if (sliport_err1 == SLIPORT_ERROR_FW_RESET1 &&
sliport_err2 == SLIPORT_ERROR_FW_RESET2) {
@@ -3042,12 +3048,12 @@ void be_detect_error(struct be_adapter *adapter)
*/
if (ue_lo || ue_hi) {
- error_detected = true;
dev_err(dev,
"Unrecoverable Error detected in the adapter");
dev_err(dev, "Please reboot server to recover");
if (skyhawk_chip(adapter))
- adapter->hw_error = true;
+ be_set_error(adapter, BE_ERROR_UE);
+
for (i = 0; ue_lo; ue_lo >>= 1, i++) {
if (ue_lo & 1)
dev_err(dev, "UE: %s bit set\n",
@@ -3060,8 +3066,6 @@ void be_detect_error(struct be_adapter *adapter)
}
}
}
- if (error_detected)
- netif_carrier_off(netdev);
}
static void be_msix_disable(struct be_adapter *adapter)
@@ -4183,7 +4187,7 @@ static int be_func_init(struct be_adapter *adapter)
msleep(100);
/* We can clear all errors when function reset succeeds */
- be_clear_all_error(adapter);
+ be_clear_error(adapter, BE_CLEAR_ALL);
}
/* Tell FW we're ready to fire cmds */
@@ -5204,7 +5208,7 @@ static void be_err_detection_task(struct work_struct *work)
be_detect_error(adapter);
- if (adapter->hw_error) {
+ if (be_check_error(adapter, BE_ERROR_HW)) {
be_cleanup(adapter);
/* As of now error recovery support is in Lancer only */
@@ -5715,8 +5719,8 @@ static pci_ers_result_t be_eeh_err_detected(struct pci_dev *pdev,
dev_err(&adapter->pdev->dev, "EEH error detected\n");
- if (!adapter->eeh_error) {
- adapter->eeh_error = true;
+ if (!be_check_error(adapter, BE_ERROR_EEH)) {
+ be_set_error(adapter, BE_ERROR_EEH);
be_cancel_err_detection(adapter);
@@ -5763,7 +5767,7 @@ static pci_ers_result_t be_eeh_reset(struct pci_dev *pdev)
return PCI_ERS_RESULT_DISCONNECT;
pci_cleanup_aer_uncorrect_error_status(pdev);
- be_clear_all_error(adapter);
+ be_clear_error(adapter, BE_CLEAR_ALL);
return PCI_ERS_RESULT_RECOVERED;
}
--
1.7.1
--
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