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Date: Mon, 15 Feb 2010 12:52:01 +0530
From: Sathya Perla <sathyap@...verengines.com>
To: netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next-2.6] be2net: implement EEH pci error recovery
handlers
The code has been tested on IBM pSeries server.
Signed-off-by: Sathya Perla <sathyap@...verengines.com>
---
drivers/net/benet/be.h | 1 +
drivers/net/benet/be_cmds.c | 23 +++++++++-
drivers/net/benet/be_main.c | 103 ++++++++++++++++++++++++++++++++++++++++++-
3 files changed, 125 insertions(+), 2 deletions(-)
diff --git a/drivers/net/benet/be.h b/drivers/net/benet/be.h
index b39b385..5038c16 100644
--- a/drivers/net/benet/be.h
+++ b/drivers/net/benet/be.h
@@ -265,6 +265,7 @@ struct be_adapter {
u32 if_handle; /* Used to configure filtering */
u32 pmac_id; /* MAC addr handle used by BE card */
+ bool eeh_err;
bool link_up;
u32 port_num;
bool promiscuous;
diff --git a/drivers/net/benet/be_cmds.c b/drivers/net/benet/be_cmds.c
index d1a0e5e..3397ee3 100644
--- a/drivers/net/benet/be_cmds.c
+++ b/drivers/net/benet/be_cmds.c
@@ -167,7 +167,14 @@ static int be_mbox_db_ready_wait(struct be_adapter *adapter, void __iomem *db)
u32 ready;
do {
- ready = ioread32(db) & MPU_MAILBOX_DB_RDY_MASK;
+ ready = ioread32(db);
+ if (ready == 0xffffffff) {
+ dev_err(&adapter->pdev->dev,
+ "pci slot disconnected\n");
+ return -1;
+ }
+
+ ready &= MPU_MAILBOX_DB_RDY_MASK;
if (ready)
break;
@@ -198,6 +205,11 @@ static int be_mbox_notify_wait(struct be_adapter *adapter)
struct be_mcc_mailbox *mbox = mbox_mem->va;
struct be_mcc_compl *compl = &mbox->compl;
+ /* wait for ready to be set */
+ status = be_mbox_db_ready_wait(adapter, db);
+ if (status != 0)
+ return status;
+
val |= MPU_MAILBOX_DB_HI_MASK;
/* at bits 2 - 31 place mbox dma addr msb bits 34 - 63 */
val |= (upper_32_bits(mbox_mem->dma) >> 2) << 2;
@@ -396,6 +408,9 @@ int be_cmd_fw_clean(struct be_adapter *adapter)
u8 *wrb;
int status;
+ if (adapter->eeh_err)
+ return -EIO;
+
spin_lock(&adapter->mbox_lock);
wrb = (u8 *)wrb_from_mbox(adapter);
@@ -768,6 +783,9 @@ int be_cmd_q_destroy(struct be_adapter *adapter, struct be_queue_info *q,
u8 subsys = 0, opcode = 0;
int status;
+ if (adapter->eeh_err)
+ return -EIO;
+
spin_lock(&adapter->mbox_lock);
wrb = wrb_from_mbox(adapter);
@@ -856,6 +874,9 @@ int be_cmd_if_destroy(struct be_adapter *adapter, u32 interface_id)
struct be_cmd_req_if_destroy *req;
int status;
+ if (adapter->eeh_err)
+ return -EIO;
+
spin_lock(&adapter->mbox_lock);
wrb = wrb_from_mbox(adapter);
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index 92c55f6..cbfaa3f 100644
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -68,6 +68,9 @@ static void be_intr_set(struct be_adapter *adapter, bool enable)
u32 reg = ioread32(addr);
u32 enabled = reg & MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
+ if (adapter->eeh_err)
+ return;
+
if (!enabled && enable)
reg |= MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
else if (enabled && !enable)
@@ -99,6 +102,10 @@ static void be_eq_notify(struct be_adapter *adapter, u16 qid,
{
u32 val = 0;
val |= qid & DB_EQ_RING_ID_MASK;
+
+ if (adapter->eeh_err)
+ return;
+
if (arm)
val |= 1 << DB_EQ_REARM_SHIFT;
if (clear_int)
@@ -112,6 +119,10 @@ void be_cq_notify(struct be_adapter *adapter, u16 qid, bool arm, u16 num_popped)
{
u32 val = 0;
val |= qid & DB_CQ_RING_ID_MASK;
+
+ if (adapter->eeh_err)
+ return;
+
if (arm)
val |= 1 << DB_CQ_REARM_SHIFT;
val |= num_popped << DB_CQ_NUM_POPPED_SHIFT;
@@ -2154,6 +2165,7 @@ static int be_ctrl_init(struct be_adapter *adapter)
spin_lock_init(&adapter->mcc_lock);
spin_lock_init(&adapter->mcc_cq_lock);
+ pci_save_state(adapter->pdev);
return 0;
free_mbox:
@@ -2417,13 +2429,102 @@ static int be_resume(struct pci_dev *pdev)
return 0;
}
+static pci_ers_result_t be_eeh_err_detected(struct pci_dev *pdev,
+ pci_channel_state_t state)
+{
+ struct be_adapter *adapter = pci_get_drvdata(pdev);
+ struct net_device *netdev = adapter->netdev;
+
+ dev_err(&adapter->pdev->dev, "EEH error detected\n");
+
+ adapter->eeh_err = true;
+
+ netif_device_detach(netdev);
+
+ if (netif_running(netdev)) {
+ rtnl_lock();
+ be_close(netdev);
+ rtnl_unlock();
+ }
+ be_clear(adapter);
+
+ if (state == pci_channel_io_perm_failure)
+ return PCI_ERS_RESULT_DISCONNECT;
+
+ pci_disable_device(pdev);
+
+ return PCI_ERS_RESULT_NEED_RESET;
+}
+
+static pci_ers_result_t be_eeh_reset(struct pci_dev *pdev)
+{
+ struct be_adapter *adapter = pci_get_drvdata(pdev);
+ int status;
+
+ dev_info(&adapter->pdev->dev, "EEH reset\n");
+ adapter->eeh_err = false;
+
+ status = pci_enable_device(pdev);
+ if (status)
+ return PCI_ERS_RESULT_DISCONNECT;
+
+ pci_set_master(pdev);
+ pci_set_power_state(pdev, 0);
+ pci_restore_state(pdev);
+
+ /* Check if card is ok and fw is ready */
+ status = be_cmd_POST(adapter);
+ if (status)
+ return PCI_ERS_RESULT_DISCONNECT;
+
+ return PCI_ERS_RESULT_RECOVERED;
+}
+
+static void be_eeh_resume(struct pci_dev *pdev)
+{
+ int status = 0;
+ struct be_adapter *adapter = pci_get_drvdata(pdev);
+ struct net_device *netdev = adapter->netdev;
+
+ dev_info(&adapter->pdev->dev, "EEH resume\n");
+
+ pci_save_state(pdev);
+
+ /* tell fw we're ready to fire cmds */
+ status = be_cmd_fw_init(adapter);
+ if (status)
+ goto err;
+
+ status = be_setup(adapter);
+ if (status)
+ goto err;
+
+ if (netif_running(netdev)) {
+ status = be_open(netdev);
+ if (status)
+ goto err;
+ }
+ netif_device_attach(netdev);
+ return;
+err:
+ dev_err(&adapter->pdev->dev, "EEH resume failed\n");
+ return;
+}
+
+static struct pci_error_handlers be_eeh_handlers = {
+ .error_detected = be_eeh_err_detected,
+ .slot_reset = be_eeh_reset,
+ .resume = be_eeh_resume,
+};
+
static struct pci_driver be_driver = {
.name = DRV_NAME,
.id_table = be_dev_ids,
.probe = be_probe,
.remove = be_remove,
.suspend = be_suspend,
- .resume = be_resume
+ .resume = be_resume,
+ .err_handler = &be_eeh_handlers
};
static int __init be_init_module(void)
--
1.6.3.3
--
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