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Date: Fri, 11 Sep 2009 14:28:14 -0700
From: Dhananjay Phadke <dhananjay@...xen.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, Amit Kumar Salecha <amit@...gic.com>,
Amit Kumar Salecha <amit@...xen.com>
Subject: [PATCH 4/5] netxen: fix tx timeout recovery
From: Amit Kumar Salecha <amit@...gic.com>
Redesign tx timeout handling in line with new firmware
reset design that co-ordinates with other PCI function
drivers.
o For NX3031, first try to reset PCI function's own
context before requesting firmware reset.
o For NX2031, since firmware heartbit is not supported
directly request firmware reset.
Signed-off-by: Amit Kumar Salecha <amit@...xen.com>
Signed-off-by: Dhananjay Phadke <dhananjay@...xen.com>
---
drivers/net/netxen/netxen_nic.h | 4 +-
drivers/net/netxen/netxen_nic_init.c | 4 +-
drivers/net/netxen/netxen_nic_main.c | 69 ++++++++++++++++++++++++++++-----
3 files changed, 64 insertions(+), 13 deletions(-)
diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index 7e3d2b9..1ae46e8 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -178,6 +178,7 @@
#define MAX_BUFFERS_PER_CMD 32
#define TX_STOP_THRESH ((MAX_SKB_FRAGS >> 2) + 4)
+#define NX_MAX_TX_TIMEOUTS 2
/*
* Following are the states of the Phantom. Phantom will set them and
@@ -1145,7 +1146,8 @@ struct netxen_adapter {
u8 link_changed;
u8 fw_wait_cnt;
u8 fw_fail_cnt;
- u16 resv4;
+ u8 tx_timeo_cnt;
+ u8 need_fw_reset;
u8 has_link_events;
u8 fw_type;
diff --git a/drivers/net/netxen/netxen_nic_init.c b/drivers/net/netxen/netxen_nic_init.c
index 8926b0e..128d1b6 100644
--- a/drivers/net/netxen/netxen_nic_init.c
+++ b/drivers/net/netxen/netxen_nic_init.c
@@ -1434,8 +1434,10 @@ int netxen_process_cmd_ring(struct netxen_adapter *adapter)
if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) {
__netif_tx_lock(tx_ring->txq, smp_processor_id());
- if (netxen_tx_avail(tx_ring) > TX_STOP_THRESH)
+ if (netxen_tx_avail(tx_ring) > TX_STOP_THRESH) {
netif_wake_queue(netdev);
+ adapter->tx_timeo_cnt = 0;
+ }
__netif_tx_unlock(tx_ring->txq);
}
}
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 4668a72..2b1b939 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -66,7 +66,7 @@ static int netxen_nic_close(struct net_device *netdev);
static netdev_tx_t netxen_nic_xmit_frame(struct sk_buff *,
struct net_device *);
static void netxen_tx_timeout(struct net_device *netdev);
-static void netxen_reset_task(struct work_struct *work);
+static void netxen_tx_timeout_task(struct work_struct *work);
static void netxen_fw_poll_work(struct work_struct *work);
static void netxen_schedule_work(struct netxen_adapter *adapter,
work_func_t func, int delay);
@@ -875,6 +875,8 @@ wait_init:
netxen_check_options(adapter);
+ adapter->need_fw_reset = 0;
+
/* fall through and release firmware */
err_out:
@@ -1183,7 +1185,7 @@ netxen_setup_netdev(struct netxen_adapter *adapter,
netdev->irq = adapter->msix_entries[0].vector;
- INIT_WORK(&adapter->tx_timeout_task, netxen_reset_task);
+ INIT_WORK(&adapter->tx_timeout_task, netxen_tx_timeout_task);
if (netxen_read_mac_addr(adapter))
dev_warn(&pdev->dev, "failed to read mac addr\n");
@@ -1882,7 +1884,7 @@ static void netxen_tx_timeout(struct net_device *netdev)
schedule_work(&adapter->tx_timeout_task);
}
-static void netxen_reset_task(struct work_struct *work)
+static void netxen_tx_timeout_task(struct work_struct *work)
{
struct netxen_adapter *adapter =
container_of(work, struct netxen_adapter, tx_timeout_task);
@@ -1890,15 +1892,37 @@ static void netxen_reset_task(struct work_struct *work)
if (!netif_running(adapter->netdev))
return;
- if (test_bit(__NX_RESETTING, &adapter->state))
+ if (test_and_set_bit(__NX_RESETTING, &adapter->state))
return;
- netxen_napi_disable(adapter);
+ if (++adapter->tx_timeo_cnt >= NX_MAX_TX_TIMEOUTS)
+ goto request_reset;
+
+ if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
+ /* try to scrub interrupt */
+ netxen_napi_disable(adapter);
- adapter->netdev->trans_start = jiffies;
+ adapter->netdev->trans_start = jiffies;
- netxen_napi_enable(adapter);
- netif_wake_queue(adapter->netdev);
+ netxen_napi_enable(adapter);
+
+ netif_wake_queue(adapter->netdev);
+
+ goto done;
+
+ } else {
+ if (!netxen_nic_reset_context(adapter)) {
+ adapter->netdev->trans_start = jiffies;
+ goto done;
+ }
+
+ /* context reset failed, fall through for fw reset */
+ }
+
+request_reset:
+ adapter->need_fw_reset = 1;
+done:
+ clear_bit(__NX_RESETTING, &adapter->state);
}
struct net_device_stats *netxen_nic_get_stats(struct net_device *netdev)
@@ -2048,6 +2072,22 @@ nx_decr_dev_ref_cnt(struct netxen_adapter *adapter)
return count;
}
+static void
+nx_dev_request_reset(struct netxen_adapter *adapter)
+{
+ u32 state;
+
+ if (netxen_api_lock(adapter))
+ return;
+
+ state = NXRD32(adapter, NX_CRB_DEV_STATE);
+
+ if (state != NX_DEV_INITALIZING)
+ NXWR32(adapter, NX_CRB_DEV_STATE, NX_DEV_NEED_RESET);
+
+ netxen_api_unlock(adapter);
+}
+
static int
netxen_can_start_firmware(struct netxen_adapter *adapter)
{
@@ -2133,9 +2173,11 @@ netxen_fwinit_work(struct work_struct *work)
switch (dev_state) {
case NX_DEV_COLD:
case NX_DEV_READY:
- netxen_start_firmware(adapter);
- netxen_schedule_work(adapter, netxen_attach_work, 0);
- return;
+ if (!netxen_start_firmware(adapter)) {
+ netxen_schedule_work(adapter, netxen_attach_work, 0);
+ return;
+ }
+ break;
case NX_DEV_INITALIZING:
if (++adapter->fw_wait_cnt < FW_POLL_THRESH) {
@@ -2195,6 +2237,11 @@ netxen_check_health(struct netxen_adapter *adapter)
if (netxen_nic_check_temp(adapter))
goto detach;
+ if (adapter->need_fw_reset) {
+ nx_dev_request_reset(adapter);
+ goto detach;
+ }
+
state = NXRD32(adapter, NX_CRB_DEV_STATE);
if (state == NX_DEV_NEED_RESET)
goto detach;
--
1.6.0.2
--
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