When system is low on atomic memory, too many error messages are logged.
Since this is not a total failure but a simple switch to non-atomic allocation
better to have a stat.

Also add a stat for reset, kicked due to transmit watchdog timeout.
Signed-off-by: NThanneeru Srinivasulu <tsrinivasulu@caviumnetworks.com>
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This feature is introduced in pass-2 chip and with this CQ interrupt
coalescing will work based on both timer and count.
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This adds support for offloading TCP segmentation to HW in pass-2
revision of hardware. Both driver level SW TSO for pass1.x chips
and HW TSO for pass-2 chip will co-exist. Modified SQ descriptor
structures to reflect pass-2 hw implementation.
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Since we have moved on to using allocated pages to carve receive
buffers instead of netdev_alloc_skb() there is no need to store
any pointers for later retrieval. Earlier we had to store
skb and skb->data pointers which later are used to handover
received packet to network stack.

This will avoid an unnecessary cache miss as well.
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The same switch-case repeates for nivc_*_intr functions.
In this patch it is moved to a helper nicvf_int_type_to_mask().

By the way:
 - Unneeded write to NICVF register dropped if int_type is unknown.
 - netdev_dbg() is used instead of netdev_err().
Signed-off-by: NYury Norov <yury.norov@auriga.com>
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Acked-by: NVadim Lomovtsev <Vadim.Lomovtsev@caiumnetworks.com>
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Properly set CQ timer threshold and also set it to 2us.
With previous incorrect settings it was set to 0.5us which is too less.
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds support for handling multiple qsets assigned to a
single VF. There by increasing no of queues from earlier 8 to max
no of CPUs in the system i.e 48 queues on a single node and 96 on
dual node system. User doesn't have option to assign which Qsets/VFs
 to be merged. Upon request from VF, PF assigns next free Qsets as
secondary qsets. To maintain current behavior no of queues is kept
to 8 by default which can be increased via ethtool.

If user wants to unbind NICVF driver from a secondary Qset then it
should be done after tearing down primary VF's interface.
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: NRobert Richter <rrichter@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch configures HW to strip 802.1Q header if found in a
receiving packet. The stripped VLAN ID and TCI information is
passed on to software via CQE_RX. Also sets netdev's 'vlan_features'
so that other HW offload features can be used for tagged packets.

This offload feature can be enabled or disabled via ethtool.

Network stack normally ignores RPS for 802.1Q packets and hence low
throughput. With this offload enabled throughput for tagged packets
will be almost same as normal packets.

Note: This patch doesn't enable HW VLAN insertion for transmit packets.
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Added ethtool support to dump receive packet error statistics reported
in CQE. Also made some small fixes
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Suppressing standard alloc_pages() warnings. Some kernel configs limit
alloc size and the network driver may fail. Do not drop a kernel
warning in this case, instead just drop a oneliner that the network
driver could not be loaded since the buffer could not be allocated.
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixing TSO packages not being counted.
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixed 'tso_hdrs' memory not being freed properly.
Also fixed SQ skbuff maintenance issues.
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Switching back to LDD transactions from LDWB.

While transmitting packets out with LDWB transactions
data integrity issues are seen very frequently.
hence switching back to LDD.
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NRobert Richter <rrichter@cavium.com>
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

GFP_KERNEL should be used in the thread context
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This fixes a coccinelle warning:

coccinelle warnings: (new ones prefixed by >>)

>> drivers/net/ethernet/cavium/thunder/nicvf_queues.c:360:1-11: alloc
>> with no test, possible model on line 367

vim +360 drivers/net/ethernet/cavium/thunder/nicvf_queues.c

   354		err = nicvf_alloc_q_desc_mem(nic, &sq->dmem, q_len,
SND_QUEUE_DESC_SIZE,
   355					     NICVF_SQ_BASE_ALIGN_BYTES);
   356		if (err)
   357			return err;
   358
   359		sq->desc = sq->dmem.base;
 > 360		sq->skbuff = kcalloc(q_len, sizeof(u64), GFP_ATOMIC);
   361		sq->head = 0;
   362		sq->tail = 0;
   363		atomic_set(&sq->free_cnt, q_len - 1);
   364		sq->thresh = SND_QUEUE_THRESH;
   365
   366		/* Preallocate memory for TSO segment's header */
 > 367		sq->tso_hdrs = dma_alloc_coherent(&nic->pdev->dev,
   368						  q_len *
TSO_HEADER_SIZE,
   369						  &sq->tso_hdrs_phys,
GFP_KERNEL);
   370		if (!sq->tso_hdrs)
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

No need to cast void* to u8*: pointer arithmetics
works same way for both.
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This fixes sparse messages like this:

drivers/net/ethernet/cavium/thunder/nicvf_main.c:1141:26: sparse: symbol
'nicvf_get_stats64' was not declared. Should it be static?

Also remove unused declarations
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds support for the Cavium ThunderX network controller.
The driver is on the pci bus and thus requires the Thunder PCIe host
controller driver to be enabled.
Signed-off-by: NMaciej Czekaj <mjc@semihalf.com>
Signed-off-by: NDavid Daney <david.daney@cavium.com>
Signed-off-by: NSunil Goutham <sgoutham@cavium.com>
Signed-off-by: NGanapatrao Kulkarni <ganapatrao.kulkarni@caviumnetworks.com>
Signed-off-by: NAleksey Makarov <aleksey.makarov@caviumnetworks.com>
Signed-off-by: NTomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: NRobert Richter <rrichter@cavium.com>
Signed-off-by: NKamil Rytarowski <kamil@semihalf.com>
Signed-off-by: NThanneeru Srinivasulu <tsrinivasulu@caviumnetworks.com>
Signed-off-by: NSruthi Vangala <svangala@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>