This change adds support for skb->xmit_more based on the changes that were
made to igb to support the feature.  The main changes are moving up the
check for maybe_stop_tx so that we can check netif_xmit_stopped to determine
if we must write the tail because we can add no further buffers.
Acked-by: NMatthew Vick <matthew.vick@intel.com>
Signed-off-by: NAlexander Duyck <alexander.h.duyck@redhat.com>
Acked-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is illegal to use atomic_set(&page->_count, 2) even if we 'own'
the page. Other entities in the kernel need to use get_page_unless_zero()
to get a reference to the page before testing page properties, so we could
loose a refcount increment.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Acked-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This change adds support for the Linux PTP Hardware clock and timestamping
functionality provided by the hardware.  There are actually two cases that
this timestamping is meant to support.

The first case would be an ordinary clock scenario.  In this configuration
the host interface does not have access to BAR 4.  However all of the host
interfaces should be locked into the same boundary clock region and as such
they are all on the same clock anyway.  With this being the case they can
synchronize among themselves and only need to adjust the offset since they
are all on the same clock with the same frequency.

The second case is a boundary clock scenario.  This is a special case and
would require both BAR 4 access, and a means of presenting a netdev per
boundary region.  The current plan is to use DSA at some point in the
future to provide these interfaces, but the DSA portion is still under
development.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Acked-by: NRichard Cochran <richardcochran@gmail.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch adds limited debugfs support for the driver.  Most of the
functionality needed for dumping registers is already provided via ethtool.
The only thing we saw that we really neeed was the ability to dump the
descriptor rings so as such this patch will add a fm10k directory containing a
listing of directories each one with a unique PCI Bus, Device, and Function
number.  Each of those BDF directories will have a list of q_vectors, and
the q_vectors will contain a file for each of the Rx/Tx rings that are a part
of the vector.  For example:

# ls -RD /sys/kernel/debug/fm10k/
/sys/kernel/debug/fm10k/:
0000:01:00.0

/sys/kernel/debug/fm10k/0000:01:00.0:
q_vector.000  q_vector.001  q_vector.002  q_vector.003

/sys/kernel/debug/fm10k/0000:01:00.0/q_vector.000:
rx_ring.000  tx_ring.000

/sys/kernel/debug/fm10k/0000:01:00.0/q_vector.001:
rx_ring.001  tx_ring.001

/sys/kernel/debug/fm10k/0000:01:00.0/q_vector.002:
rx_ring.002  tx_ring.002

/sys/kernel/debug/fm10k/0000:01:00.0/q_vector.003:
rx_ring.003  tx_ring.003

# cat /sys/kernel/debug/fm10k/0000:01:00.0/q_vector.000/rx_ring.000
DES DATA       RSS        STATERR    LENGTH VLAN   DGLORT SGLORT TIMESTAMP
---------------------------------------------------------------------------
000 0x00000000 0x00000000 0x00000003 0x002a 0x0000 0x0000 0x0000 0x13951807dc4fedf0
001 0x00000000 0x00000000 0x00000003 0x002a 0x0000 0x0000 0x0000 0x1395180906c9f2c8
002 0x3731c000 0x00000000 0x00000000 0x0000 0x0000 0x0000 0x0000 0x0000000000000000
003 0x3731d000 0x00000000 0x00000000 0x0000 0x0000 0x0000 0x0000 0x0000000000000000
004 0xaab3a000 0x00000000 0x00000000 0x0000 0x0000 0x0000 0x0000 0x0000000000000000
...

# cat /sys/kernel/debug/fm10k/0000:01:00.0/q_vector.000/tx_ring.000
DES BUFFER_ADDRESS     LENGTH VLAN   MSS    HDRLEN FLAGS
---------------------------------------------------------
000 0x00000000aa8a1002 0x005a 0x0000 0x0000 0x0000 0xc0
001 0x00000000aa8a2002 0x005a 0x0000 0x0000 0x0000 0xc0
002 0x000000006bc13202 0x004e 0x0000 0x0000 0x0000 0xc0
003 0x000000006bc13c02 0x002a 0x0000 0x0000 0x0000 0xe1
004 0x000000006bc13602 0x0062 0x0000 0x0000 0x0000 0xc0
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch adds support for L2 MACVLAN by making use of the fact that the
RRC provides a unique tag per filter called a Global Resource Tag, or GLORT.
In the case of this offload what I have done is assigned a linear block of
these so that each GLORT represents one of the MACVLAN netdevs.  By doing
this I can share the Rx queues and Tx queues for all of the MACVLAN netdevs
while allowing them to be demuxed in the Rx cleanup path.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch adds support for basic offloads including TSO, Tx checksum, Rx
checksum, Rx hash, and the same features applied to VXLAN/NVGRE tunnels.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch takes the driver from supporting a single queue to supporting
multiple queues.  The upper queue limit for the PF is 128 queues and the
upper limit for the VF is (128 / num_vfs) rounded down to nearest power of 2.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This change adds the transmit and receive fastpath and interrupt handlers.
With this code in place the network device is now able to send and receive
frames over the network interface using a single queue.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
CC: Rick Jones <rick.jones2@hp.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This change adds the defines and structures necessary to support both Tx
and Rx descriptor rings.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch set adds interrupt support for the fm10k interfaces.  The
interfaces themselves only support MSI-X, so neither MSI or legacy
interrupts are used.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch adds the basic defines and structures needed by the PF for
operation.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch adds the beginning framework onto which I am going to add the
fm10k driver which supports the Intel(R) FM10000 Ethernet Switch Host
Interface.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>