For NX3031, multicast filtering, promisc mode, and max frame size
setting is handled by firmware, driver needs to send request to
enable/disable it.

For old chip revisions / firmware, driver still sets it directly.

Added function pointer to set mtu according to chip revision.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Initialize producer and consumer indices during netdev open(), only
for old firmware/chip.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Fix legacy interrupt mode for NX3031 chips, read pci interrupt state
in hardware to guard against spurious interrupt.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Add couple of new board configurations based on NX3031 chip.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

For NX3031, the phy is managed by firmware, so driver should avoid
setting any phy registers.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Change driver version to 4.0.0. Netxen firmwares as old as
v3.4.216 are supported.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Enable tso6 and ipv6 checksum, interrupt coalescing for NX3031.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

NX3031 supports cut-through operation where ingress packets are
directly dma'ed into host buffers to reduce latency.

This requires larger dma buffers (2kb) and different alignemnt.

The buffer posting logic is changed a bit. The free rx buffers
are maintained in linked list, since the received reference
handles can be out of order. However rx descriptors are still
posted sequentially, indexed by producer.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

MAC addr, multicast filters, mtu are set through firmware commands
in firmware v4.0.0+ because of virtualization of physical ports.
Link status is also read from registers allocated by firmware for
each virtual port.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Contains rx and tx ring context management and certain
firmware commands for netxen firmware v4.0.0+.

This patch gathers all HW context management code into
netxen_nic_ctx.c.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

It had only couple of functions which are moved to main.c
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Add initialization code in pci probe for new chip and retain
compatibility with old revisions.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

New revision of netxen chip has 2MB PCI memory. Older chips
had 128MB addressable PCI memory. To retain compatibility,
this patch adds function pointers based on pci bar0 size.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Add macros for new chip revision and board configurations.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Enable multicast address filtering capabilities in the hardware.
Upto 16 multicast addresses can be programmed for each physical
port. Support "allmulti" mode, if enabled.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

o Reduce access to global arrays in data path.
o Remove duplicate/unused variables, unecessary alignment constraints.
o Use correct pci_dev instead of fallback device for consistent
  allocations.
o Disable ethtool set_eeprom functionality for now, it was only used
  for flashing firmware.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

	PCI_DEVICE_CLASS sets .device and .vendor to PCI_ANY_DEV,
which overrides the effect of preceding PCI_DEVICE() and makes
all elements of netxen_pci_tbl[] identical.  Introduced in the
commit dcd56fdb.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Downloading firmware in pci probe allows recovery in case of
firmware failure by reloading the driver.

Also reduced delays in firmware load.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

o Remove unnecessary debug prints and functions.
o Explicitly specify pci class (0x020000) to avoid enabling
  management function.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Store physical port number in netxen_adapter structure.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

This fixes a the issue where logical port number is set incorrectly
for HP blade mezz cards.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Don't need to keep a struct netxen_new_user_info on the stack
when we only are interested in printing the serial_num.  Change
to only reading the serial_num.
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

None of these files use any of the functionality promised by
asm/semaphore.h.  It's possible that they rely on it dragging in some
unrelated header file, but I can't build all these files, so we'll have
fix any build failures as they come up.
Signed-off-by: NMatthew Wilcox <willy@linux.intel.com>

This patch #if 0's the no longer used netxen_nic_link_ok().
Signed-off-by: NAdrian Bunk <bunk@kernel.org>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

netxen_workq can now become static.
Signed-off-by: NAdrian Bunk <bunk@kernel.org>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Don't count rx dropped packets based on return value of netif_receive_skb(),
which is misleading.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Tested-by: NVernon Mauery <mauery@us.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

o eliminate tx lock in netxen adapter struct, instead pound on netdev
  tx lock appropriately.
o remove old "concurrent transmit" code that unnecessarily drops and
  reacquires tx lock in hard_xmit_frame(), this is already serialized
  the netdev xmit lock.
o reduce scope of tx lock in tx cleanup. tx cleanup operates on
  different section of the ring than transmitting cpus and is
  guarded by producer and consumer indices. This fixes a race
  caused by rx softirq preemption on realtime kernels.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Tested-by: NVernon Mauery <mauery@us.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

o separate and simpler irq handler for msi interrupts, avoids few checks
  than legacy mode.
o avoid redudant tx_has_work() and rx_has_work() checks in interrupt
  and napi, which can uncork irq based on racy (lockless) access to tx
  and rx ring indices. If we get interrupt, there's sufficient reason to
  schedule napi.
o replenish rx ring more often, remove self-imposed threshold rcv_free
  that prevents posting rx desc to card. This improves performance in
  low memory.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Tested-by: NVernon Mauery <mauery@us.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Recent netxen firmware has new scheme of generating MSI interrupts, it
raises interrupt and blocks itself, waiting for driver to unmask. This
reduces chance of spurious interrupts.

The driver will be able to deal with older firmware as well.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Tested-by: NVernon Mauery <mauery@us.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

This patch contains the following cleanups:
- static functions in .c files shouldn't be marked inline
- make needlessly global code static
- #if 0 unused code
Signed-off-by: NAdrian Bunk <bunk@kernel.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Using ARRAY_SIZE() on arrays of the form array[][K] makes it unnecessary
to know the value of K when checking its size.
Signed-off-by: NAlejandro Martinez Ruiz <alex@flawedcode.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Here's the reworked patch.

This cleans up some unnecessary byte-swapping while setting up tx and
interpreting rx desc. The 64 bit rx status data should be converted
to host endian format only once and the macros just need to extract
bitfields.

This saves a spate of interrupts on pseries blades caused by buggy
(non) processing rx status ring.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

netxen driver allows limited number of threads simultaneously posting
skb's in tx ring. If transmit slot is unavailable, driver calls
schedule() or loops in xmit_frame().

This patch returns TX_BUSY and lets the stack reschedule the packet if
transmit slot is unavailable. Also removes unnecessary check for tx
timeout in the driver itself, the network stack does that anyway.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

This patch fixes bug that doesn't quiesce second port when interface is
brought down, which could lead to unwarranted interrupt during rmmod /
ifdown.
Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>