From 6a581e93981e8838c85e407303186faf937830d3 Mon Sep 17 00:00:00 2001 From: Dhananjay Phadke Date: Sat, 5 Sep 2009 17:43:08 +0000 Subject: netxen: firmware hang detection Implement state machine to detect firmware hung state and recover. Since firmware will be shared by all PCI functions that have different class drivers (NIC or FCOE or iSCSI), explicit hardware based serialization is required for initializing firmware. o Used global scratchpad register to maintain device reference count. Every probed pci function adds to ref count. o Implement timer (delayed work) for each pci func that checks firmware heartbit every 5 sec and detaches itself if firmware is dead. Last detaching function reloads firmware. Other functions wait for firmware init, and re-attach themselves. Heartbit is not supported by NX2031 firmware. Signed-off-by: Amit Kumar Salecha Signed-off-by: Dhananjay Phadke Signed-off-by: David S. Miller --- drivers/net/netxen/netxen_nic_ctx.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/net/netxen/netxen_nic_ctx.c') diff --git a/drivers/net/netxen/netxen_nic_ctx.c b/drivers/net/netxen/netxen_nic_ctx.c index 0f42ab998368..8ab5773e47d6 100644 --- a/drivers/net/netxen/netxen_nic_ctx.c +++ b/drivers/net/netxen/netxen_nic_ctx.c @@ -678,6 +678,9 @@ int netxen_alloc_hw_resources(struct netxen_adapter *adapter) if (!NX_IS_REVISION_P2(adapter->ahw.revision_id)) { + if (test_and_set_bit(__NX_FW_ATTACHED, &adapter->state)) + goto done; + err = nx_fw_cmd_create_rx_ctx(adapter); if (err) goto err_out_free; @@ -690,6 +693,7 @@ int netxen_alloc_hw_resources(struct netxen_adapter *adapter) goto err_out_free; } +done: return 0; err_out_free: @@ -708,6 +712,9 @@ void netxen_free_hw_resources(struct netxen_adapter *adapter) int port = adapter->portnum; if (!NX_IS_REVISION_P2(adapter->ahw.revision_id)) { + if (!test_and_clear_bit(__NX_FW_ATTACHED, &adapter->state)) + goto done; + nx_fw_cmd_destroy_rx_ctx(adapter); nx_fw_cmd_destroy_tx_ctx(adapter); } else { @@ -720,6 +727,7 @@ void netxen_free_hw_resources(struct netxen_adapter *adapter) /* Allow dma queues to drain after context reset */ msleep(20); +done: recv_ctx = &adapter->recv_ctx; if (recv_ctx->hwctx != NULL) { -- cgit v1.2.1