This addition will also allow to configure DMA burst length.
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: NCyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

removing unused function as part of driver cleanup.`
Signed-off-by: NMugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixes sparse warning intrduced by commit 0fef9d03 ("net/mlx4_en: Disable
blueflame using ethtool private flags")
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NAmir Vadai <amirv@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Ethernet RX DMA buffers are polled in NAPI work queue other than received
directly in DMA RX interrupt handler.
Signed-off-by: NSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix incorrect check introduced in commit fc5ab020 ("cxgb4: Replaced the
backdoor mechanism to access the HW memory with PCIe Window method"). We where
checking for write operation and doing a read, changed it accordingly.
Signed-off-by: NHariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Get rid of the CONFIG_PM_SLEEP ifdef by annotating the suspend/resume functions
with '__maybe_unused' in order to keep the code simpler and shorter.

While at it, declare the suspend/resume functions in a single line.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Sometimes the AQTX answer comes back with no data, but we still want to print
the descriptor that got written back.

Change-ID: I5f734d99b4c95510987413893f0a34626571d474
Signed-off-by: NShannon Nelson <shannon.nelson@intel.com>
Tested-by: NJim Young <jamesx.m.young@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Give link a little more time to come back up after setting flow control
before resetting. In the new NVMs it is taking longer for link to come back.
This causes the driver to attempt to reset the link, which then errors
because the firmware was already in the middle of a reset. Also, initialize
err to 0.

Change-ID: I1cc987a944e389d8909c262da5796f50722b4d6b
Signed-off-by: NCatherine Sullivan <catherine.sullivan@intel.com>
Tested-by: NJim Young <jmyoungx@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Reword the error messages. Also add a major version check because
We only want to warn on nvm_minor > expected_minor if
nvm_major == expected_major. Lastly, change an if to an else if
because the two statements will never evaluate to true at the same time.

Change-ID: I6ddf9986f26b35f6879cbeac4fcef04a8497a383
Signed-off-by: NCatherine Sullivan <catherine.sullivan@intel.com>
Tested-by: NJim Young <jamesx.m.young@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Copy desc and buffer data even for ARQ events which return error status.
Previously, a check for NVM related AQ commands which is done later in this
function would not recognize that such a command was received and would
not clear nvm_busy flag. This would block access to NVM until a driver reset.
This will fix that.

Change-ID: If69ad74e165b56081c0686b97402511d2e2880c0
Signed-off-by: NKamil Krawczyk <kamil.krawczyk@intel.com>
Tested-by: NJim Young <jamesx.m.young@intel.com>
Tested-by: NSibai Li <sibai.li@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

We really don't need to delay an entire millisecond just to get into our
critical section. A microsecond will be sufficient, thank you.

Change-ID: I2d02ece6610007d98cabcb3f42df9a774bb54e59
Signed-off-by: NMitch Williams <mitch.a.williams@intel.com>
Tested-by: NSibai Li <sibai.li@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The hardware design requires that the driver avoid indicating
checksum offload success on some ipv6 frames with extension
headers.

The code needs to just check for the IPV6EXADD bit and if
it is set punt the checksum to the stack.  I don't know why
the code was checking TCP on inner protocol, as that code
doesn't make any sense to me but seems wrong, so remove it.

Change-ID: I10d3aacdbb1819fb60b4b0eb80e6cc67ef2c9599
Signed-off-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-By: NJim Young <jamesx.m.young@intel.com>
Tested-by: NSibai Li <sibai.li@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This implements a state machine intended to support the userland tool for
updating the device eeprom. The state machine implements one-shot reads,
writes, multi-step write sessions, and checksum requests. If we're in the middle
of a multi-step write session, no one should fire off other writes, however, one
shot reads are valid. The userland tool is expected to keep track of its session
status, arrange the placement and ordering of the writes, and deal with the
checksum requirement.

This patch also adds nvmupdate support to ethtool callbacks.
The get_eeprom() and set_eeprom() services in ethtool are used here to
facilitate the userland NVMUpdate tool.  The 'magic' value in the get and
set commands is used to pass additional control information for managing
the read and write steps.

The read operation works both as normally expected in the standard ethtool
method, as well as with the extra NVM controls.  The write operation
works only for the expanded NVM functions - the normal ethtool method is
not allowed because of the NVM semaphore management needed for multipart
writes, as well as the checksum requirement.

Change-ID: I1d84a170153a9f437906744e2e350fd68fe7563d
Signed-off-by: NShannon Nelson <shannon.nelson@intel.com>
Tested-by: NJim Young <jamesx.m.young@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

spotted by cppcheck
Signed-off-by: NToralf Förster <toralf.foerster@gmx.de>
Tested-by: NJim Young <jamesx.m.young@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Bump version number.
Signed-off-by: NTodd Fujinaka <todd.fujinaka@intel.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch adds a check and prints the error cause register value when
the hardware detects a malformed packet.  This is a very unlikely
scenario but has been seen occasionally, so printing the message to
assist the user.
Signed-off-by: NCarolyn Wyborny <carolyn.wyborny@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch prevents the display of the minimum link qualification check
if we might be in a virtual machine. This check is incorrect and
misleading in this case, since we actually don't really know what the
available bandwidth is. To do so, we simply check whether each function
on the bus matches our device id. If it doesn't the most likely scenario
is that we're directly assigned to a virtual machine.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NPhil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Fix a bug in the misuse of the list_for_each macro to loop over every
entry in the bus_list. Instead of attempting to loop over the list from
a random entry point, go up to the bus and use the real list_head entry
point. This prevents the possible read or write of unallocated or
incorrectly addressed memory.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NPhil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Change some uses of strncpy to use the more appropriate strlcpy
when clearing is not needed to prevent information leakage. Also
change some length arguments to use the preferred sizeof form.
Signed-off-by: NMark Rustad <mark.d.rustad@intel.com>
Tested-by: NPhil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

In ixgbe_probe, the code at label err_dma can dereference adapter
when it has a NULL value. The check is there to avoid disabling a
disabled device. When adapter is NULL, treat it as if the device
is enabled, because it is enabled in that case.
Signed-off-by: NMark Rustad <mark.d.rustad@intel.com>
Tested-by: NPhil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

There were two places that used kzalloc() with a multiplied sizeof(),
replace these with kcalloc as recommended by checkpatch.pl.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

checkpatch.pl flagged two locations that did not comply to "CHECK:
braces {} should be used on all arms of this statement", fix them.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

checkpatch.pl flagged two blank lines which are not needed, and one that
was missing, fix them.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

checkpatch.pl flagged a lot of "CHECK: Alignment should match open
parenthesis" checks, fix all of them to make the driver neater. While
at it fix some obvious typos and re-arrange some of the lines to avoid
going over 80 columns.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use a smaller GPLv2 header and remove all the boilerplate code as well
as the FSF mail address.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add basic support for rx busy polling. Instead of introducing new
states and spinlock to synchronize between NAPI and polling method,
this patch just reuse NAPI state to avoid extra overhead for fast path
and simplified the codes.

Test was done between a kvm guest and an external host. Two hosts were
connected through 40gb mlx4 cards. With both busy_poll and busy_read
are set to 50 in guest, 1 byte netperf tcp_rr shows 127% improvement:
transaction rate was increased from 8353.33 to 18966.87.

Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Vlad Yasevich <vyasevic@redhat.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NJason Wang <jasowang@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Move common receive logic to a new helper virtnet_receive(). It will
also be used by rx busy polling method.

Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Vlad Yasevich <vyasevic@redhat.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NJason Wang <jasowang@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch use the struct pci_device_id instead of using macro
DEFINE_PCI_DEVICE_TABLE which is deprecated and should not be used.
And also moves these ids after probe and remove functionalities.
Signed-off-by: NVarka Bhadram <varkab@cdac.in>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch converts to use the macro module_pci_driver, which makes
the code smaller and simpler.

Previously in this driver we are having driver version info will be
printed log buffer based on whether the driver selected as module
or statically into image itself. By using the module_pci_driver that
part of the code removed. For the first time of the device init,
we are making the version info to be printed once.
Signed-off-by: NVarka Bhadram <varkab@cdac.in>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support to view addresses added by the driver and learnt by the
hardware from ALE table via ethtool register dump interface.
Signed-off-by: NMugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When timestamping received packets, rx_timestamp_work may be scheduled
before the timestamps is received from the hardware resulting in the
packet beeing delivered without the timestamp.

This is fixed by changing the receive timestamp path:

On receiving a packet that need timestamping, the rxts list is
traversed.  If a match is found, packet+timestamp are delivered,
otherwise the packet is added to a rx_queue.

When a timestamp arrives rx_queue is traversed and if a matching
packet is found, it is delivered with the timestamp. Otherwise the
timestamp is added to the rxts list for matching with packets arriving
later.

In case the hardware drops a timestamp, a workqueue regularly checks
the queue for old packets and delivers them without a timestamp.
Signed-off-by: NStefan Sørensen <stefan.sorensen@spectralink.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds the sfc driver code for implementing busy polling.
It adds ndo_busy_poll method and locking between it and napi poll.
It also adds each napi to the napi_hash right after netif_napi_add().

Uses efx_start_eventq and efx_stop_eventq in the self tests.
Signed-off-by: NShradha Shah <sshah@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When memory is limited, reduce number of rx and tx rings.
Signed-off-by: NAmir Vadai <amirv@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When running in kdump kernel, reduce number of resources allocated for
the hardware. This will enable the NIC to operate in this low memory
environment at the expense of performance and some features not related
to the basic NIC functionality.
Signed-off-by: NAmir Vadai <amirv@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Enable the user to turn off the hardware feature called BlueFlame.
Since it is something specific to mlx4_en hardware, we control
the feature via ethtool private flags.
Signed-off-by: NAmir Vadai <amirv@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When port is down dev_addr is changed (e.g. by bonding) but current_mac
is not touched. When port is up again, hash_mac is updated to dev_addr,
but current_mac isn't. This leads to inconsistency between current_mac
and mac_hash. Because of that, mlx4_en_replace_mac() fails to find
current_mac in mac_hash.

Fix is to reset current_mac to dev_addr when port is up - as we do for
mac_hash.
Signed-off-by: NEyal Perry <eyalpe@mellanox.com>
Signed-off-by: NAmir Vadai <amirv@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Now that all the users of mvpp2_bm_bufs_free() have been fixed, we can safely
clean the function prototype.

The function is always called to release all the buffers in a BM pool, and
the number of buffers freed is not needed. Therefore, we change the return
to a void, and remove the "num" parameter. This is a cosmetic change, to
make the code slightly cleaner.
Signed-off-by: NEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

After a call to mvpp2_bm_bufs_free(), the caller usually wants to know
if the function successfully freed the requested number. However, this
cannot be done by looking into the BM pool count, because the current
buffer count was updated by mvpp2_bm_bufs_free().

In fact, the current callers of mvpp2_bm_bufs_free() use it to release
all the buffers in the pool, so we can fix this by simply checking
if the pool is not empty.
Signed-off-by: NEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently, the network interfaces that are not configured by the bootloader
(using e.g. tftp or ping) can detect the link status but are unable to
transmit data.

The network controller has a functionality that allows the hardware to
continuously poll the PHY and directly update the MAC configuration accordingly
(speed, duplex, etc.). However, this doesn't work well with phylib's
software-based polling and updating MAC configuration in the driver's callback.

This commit fixes this issue by:

  1. Setting MVPP2_PHY_AN_STOP_SMI0_MASK in MVPP2_PHY_AN_CFG0_REG in
     mvpp2_init(), which disables the harware polling feature.

  2. Disabling MVPP2_GMAC_PCS_ENABLE_MASK bit in MVPP2_GMAC_CTRL_2_REG in
     mvpp2_port_mii_set() for port types other than SGMII.
Signed-off-by: NMarcin Wojtas <mw@semihalf.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This bit was originally wrong, the correct value is BIT(1), so fix it.
Signed-off-by: NMarcin Wojtas <mw@semihalf.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>