After successful firmware init, return instead of
falling to error path (leading to detach) after
resuming to D0 state. This was broken in recent
firmware reset rehaul.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix minor bug in netdev tx timeout handling which could
always lead to firmware reset instead of pci function reset.

netxen_nic_reset_context() requires __NX_RESETTING bit
cleared.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

o Add QLogic copyright, add linux-driver@qlogic.com to
  MAINTAINERS.
o Delete old contact information.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

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: NAmit Kumar Salecha <amit@netxen.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Release file firmware when no firmware reset is required.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

o Access on card memory through memory controller (agent)
  rather than moving small pci window around. Clean up the
  code for moving windows around.

o Restrict memory accesss to 64 bit, currently only firmware
  download uses this.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When CONFIG_INET is disabled, netxen has a build failure:

netxen_nic_main.c:(.text+0x118fd1): undefined reference to `netxen_config_indev_addr'

so make that function just an empty stub when CONFIG_INET=n.
(not "inline" since that conflicts with other declarations of it)
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Acked-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix typo in checking dest ip has support before
programming destip addresses.
Signed-off-by: NAmit Kumar Salecha <amit@netxen.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

o Combine netxen_get_firmware_info(), netxen_check_options()
  so that they are updated every time firmware is reset.
o Set dma mask everytime firmware is reset.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

For registers accessed in fast path (interrupt / softirq)
avoid expensive I/O address translation. These registers
are directly mapped in PCI bar 0 and do not require
any window checks.
Signed-off-by: NAmit Kumar Salecha <amit@netxen.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Reprogram local IP addresses after firmware is reset
or after resuming from suspend.
Signed-off-by: NAmit Kumar Salecha <amit@netxen.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

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: NAmit Kumar Salecha <amit@netxen.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Unwind allocations and release file firmware when
when firmware load fails.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix a perpetual while() loop in unwinding partial
mapped tx skb on dma mapping failure.
Reported-by: N"Juha Leppanen" <juha_motorsportcom@luukku.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Remove duplicate calls to netxen_napi_add().
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In a couple of cases collapse some extra code like:
   int retval = NETDEV_TX_OK;
   ...
   return retval;
into
   return NETDEV_TX_OK;
Signed-off-by: NStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When the interface is put in bridged mode, destination mac
addresses are unknown to firmware. So packets take a slow
path (lower priority) in firmware reducing performance.

Firmware can cache limited number of remote unicast mac
addresses for certain interval, if "dynamic mac learning"
mode is enabled.

Driver needs to enable this "mac learning" mode in firmware.
Currently this is done through net device class sysfs entry,
possibly this can also be done upon netlink notifications to
from bridge.
Signed-off-by: NNarender Kumar <narender.kumar@qlogic.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Consolidate register definitions in netxen_nic_hdr.h
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Implement pci driver shutdown functionality, this helps
quiescing all PCI transaction before chipset is reset.

Amit Kumar Salecha <amit@qlogic.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Move all tx skb mapping code into netxen_map_tx_skb().
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If netxen_need_fw_reset() return 0 [ implies firmware is up
and running], still go through dma mask check, etc.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add ethtool -K knob to control LRO in firmware.
LRO path is completely separated from GRO, LRO packets
are still fed with netif_receive_skb().

Also fix ethtool statistics to include LRO packets.
Also use correct message type while configuring interrupt coalescing.
Signed-off-by: NNarender Kumar <narender.kumar@qlogic.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

o Defer napi resouce allocation to device attach.

o Free napi resources and delete napi during detach.

This ensures right behavior across firmware reset.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

o Remove private workqueue in the driver, move all
  scheduled tasks to keventd workqueues. This makes
  ports (interfaces) of same / different NIC boards
  independent, in terms of their link watchdog and
  reset tasks.

o Move quick checks for link status and temperature
  in timer callback, schedule watchdog task only if
  link status changed or temperature reached critical
  threshold.

This also fixes deadlock when thermal panic occurs,
watchdog work was flushing workqueue that it was
sitting on.
Signed-off-by: NAmit Kumar Salecha <amit@qlogic.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix the calculation of remaining header length in TSO
over vlan device case. This was inadvertently missed
out in patch 028afe71 ("netxen: add vlan
tx acceleration support").
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix dma mask calculation that caps at 63-bit addressing even
when firmware advertises full 64-bit support.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Change default dma mask for NX3031 to 39 bit with ability
to update it to 64-bit (if firmware indicates support). Old
code was restricting it under 4GB (32-bit), sometimes causing
failure to allocate descriptor rings on heavily populated
system. NX2031 based NICs will still get 32-bit coherent mask.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Wrap dest IP hashing code with #ifdef CONFIG_INET,
this feature makes no sense without INET, but other
driver can still work.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Acked-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support for ethtool -G to tune rx and tx ring sizes
per interface basis.

This is only supported for NX3031 based cards.
Signed-off-by: NAmit Kumar Salecha <amit@netxen.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Enable vlan tx acceleration for NX3031 if firmware advertises
capability.
Signed-off-by: NAmit Kumar Salecha <amit@netxen.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Move all net_device initialization into one function
netxen_setup_netdev().
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

NX2031 firmware version will never be > 4.0.0, so replace
(adapter->fw_major < 4) checks with pci revision ID check.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

o move all tso / checksum offload code into netxen_tso_check().
o optimize the tso header copy into simple loop.
o clean up unnecessary unions from cmd_desc_type0 struct.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

o remove superfluous code to setup PCI dma watchdog for NX2031.
o disable dma watchdog completely for NX3031 (not required).
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Initialize and configure interrupt coalesing defaults
in the firmware, so that these also reflect in "ethool -c".
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

NX3031 hardware requires local IP addresses for packet
accumulation (LRO). IP address hashing is required to
distinguish a local TCP flow from others (forwarded or
guest).

This patch adds listener for IP and netdev events and
configures IP address in the firmware.
Signed-off-by: NAmit Kumar Salecha <amit@netxen.com>
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

o move dma mask update to netxen_start_firmware() so that
  if firmware changes across suspend (e.g. file -> flash)
  it reflects right dma mask.
o re-read firmware capabilities after firmware reset.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Check temperature for all PCI functions, that can allow
graceful shutdown of all interfaces on the overheated card.

Old code was only monitoring temperature for function 0 only.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

netxen: fix deadlock on dev close

The tx ring accounting fix in commit cb2107be
("netxen: fix tx ring accounting") introduced intermittent
deadlock when inteface is going down.

This was possibly combined effect of speculative tx pause,
calling netif_tx_lock instead of queue lock and unclean
synchronization with napi which could end up unmasking
interrupt.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>