Signed-off-by: NRick Farrington <ricardo.farrington@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Support setting the link speed of CN23XX-225 cards (which can do 25Gbps or
10Gbps) via ethtool_ops.set_link_ksettings.

Also fix the function assigned to ethtool_ops.get_link_ksettings to use the
new link_ksettings api completely (instead of partially via
ethtool_convert_legacy_u32_to_link_mode).
Signed-off-by: NWeilin Chang <weilin.chang@cavium.com>
Acked-by: NRaghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

NIC firmware does not support disabling rx vlan offload, but the VF driver
incorrectly indicates that it is supported.  The PF driver already does the
correct indication by clearing the NETIF_F_HW_VLAN_CTAG_RX bit in its
netdev->hw_features.  So just do the same thing in the VF.
Signed-off-by: NRaghu Vatsavayi <raghu.vatsavayi@cavium.com>
Acked-by: NPrasad Kanneganti <prasad.kanneganti@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Enhancing driver to accept max supported queues for ethtool --set-channels
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moved common function setup_glists to lio_core.c
and reamed it to lio_setup_glists
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common definition octnic_gather to octeon_network.h
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moved common function delete_glists to lio_core.c
and renamed it to lio_delete_glists
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moved common function list_delete_head to octeon_network.h
and renamed it to lio_list_delete_head
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moved common function if_cfg_callback to lio_core.c
and renamed it to lio_if_cfg_callback.
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Support ndo_get_stats64 instead of ndo_get_stats.  Also add stats for
multicast and broadcast packets.
Signed-off-by: NPradeep Nalla <pradeep.nalla@cavium.com>
Acked-by: NRaghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This commit has fix for RX traffic issues when we stress test the driver
with continuous ifconfig up/down under very high traffic conditions.

Reason for the issue is that, in existing liquidio_stop function NAPI is
disabled even before actual FW/HW interface is brought down via
send_rx_ctrl_cmd(lio, 0). Between time frame of NAPI disable and actual
interface down in firmware, firmware continuously enqueues rx traffic to
host. When interrupt happens for new packets, host irq handler fails in
scheduling NAPI as the NAPI is already disabled.

After "ifconfig <iface> up", Host re-enables NAPI but cannot schedule it
until it receives another Rx interrupt. Host never receives Rx interrupt as
it never cleared the Rx interrupt it received during interface down
operation. NIC Rx interrupt gets cleared only when Host processes queue and
clears the queue counts. Above anomaly leads to other issues like packet
overflow in FW/HW queues, backpressure.

Fix:
This commit fixes this issue by disabling NAPI only after informing
firmware to stop queueing packets to host via send_rx_ctrl_cmd(lio, 0).
send_rx_ctrl_cmd is not visible in the patch as it is already there in the
code. The DOWN command also waits for any pending packets to be processed
by NAPI so that the deadlock will not occur.
Signed-off-by: NRaghu Vatsavayi <raghu.vatsavayi@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Napi is checking Tx queue status and waking the Tx queue if required.
Same operation is being done while freeing every Tx buffer.
So removed the duplicate operation of checking Tx queue status from the Tx
buffer free functions.
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

For consistency renaming txqs_start to start_txqs
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

For consistency renaming txqs_stop to stop_txqs
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

For consistency renaming txqs_wake to wake_txqs
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Using skb_iq function for deriving queue from skb
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Removing one line function wake_q
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Removing one line function stop_q
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Removing checks for netif_is_multiqueue.
Configuring single queue will be a multiqueue netdev with one queues.
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Removing start_txq function from VF and PF files
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common function skb_iq to to octeon_network.h
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common function txqs_start to octeon_network.h
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common function txqs_wake to octeon_network.h
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common function txqs_stop to octeon_network.h
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: NDerek Chickles <derek.chickles@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In a scenario where the command queued to firmware get dropped or times
out, MTU change from host will not propagate to firmware. So, it is
required for host driver to wait for response from firmware or timeout
and then return correct status to caller of ndo_change_mtu.

Also moved the common code for MTU change from PF and VF driver files to
common file lio_core.c
Signed-off-by: NVeerasenareddy Burru <veerasenareddy.burru@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Doing ifconfig down on VF driver in the middle of receiving line rate
traffic causes a kernel panic:

    LiquidIO_VF 0000:02:00.3: should not come here should not get rx when poll mode = 0 for vf
    BUG: unable to handle kernel NULL pointer dereference at           (null)
    .
    .
    .
    Call Trace:
     <IRQ>
     ? tasklet_action+0x102/0x120
     __do_softirq+0x91/0x292
     irq_exit+0xb6/0xc0
     do_IRQ+0x4f/0xd0
     common_interrupt+0x93/0x93
     </IRQ>
    RIP: 0010:cpuidle_enter_state+0x142/0x2f0
    RSP: 0018:ffffffffa6403e20 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff59
    RAX: 0000000000000000 RBX: 0000000000000003 RCX: 000000000000001f
    RDX: 0000000000000000 RSI: 000000002ab7519f RDI: 0000000000000000
    RBP: ffffffffa6403e58 R08: 0000000000000084 R09: 0000000000000018
    R10: ffffffffa6403df0 R11: 00000000000003c7 R12: 0000000000000003
    R13: ffffd27ebd806800 R14: ffffffffa64d40d8 R15: 0000007be072823f
     cpuidle_enter+0x17/0x20
     call_cpuidle+0x23/0x40
     do_idle+0x18c/0x1f0
     cpu_startup_entry+0x64/0x70
     rest_init+0xa5/0xb0
     start_kernel+0x45e/0x46b
     x86_64_start_reservations+0x24/0x26
     x86_64_start_kernel+0x6f/0x72
     secondary_startup_64+0xa5/0xa5
    Code:  Bad RIP value.
    RIP:           (null) RSP: ffff9246ed003f28
    CR2: 0000000000000000
    ---[ end trace 92731e80f31b7d7d ]---
    Kernel panic - not syncing: Fatal exception in interrupt
    Kernel Offset: 0x24000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
    ---[ end Kernel panic - not syncing: Fatal exception in interrupt

Reason is:  in the function assigned to net_device_ops->ndo_stop, the steps
for bringing down the interface are done in the wrong order.  The step that
notifies the NIC firmware to stop forwarding packets to host is done too
late.  Fix it by moving that step to the beginning.
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NRaghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Defer ringing the Tx doorbell if skb->xmit_more is set unless the Tx queue
is full or stopped.  To keep latency low, use a deferral limit of 8
packets.  We chose 8 because Octeon can fetch at most 8 packets in a single
PCI read, and our tests show that 8 results in low latency.
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: NSatanand Burla <satananda.burla@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

NULL check before freeing functions like kfree is not needed.

This issue was detected with the help of Coccinelle.
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NVeerasenareddy Burru <veerasenareddy.burru@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A VF's MTU is capped at the parent PF's MTU.  So if there's a change in the
PF's MTU, then update the VF's netdev->max_mtu.

Also remove duplicate log messages for MTU change.
Signed-off-by: NVeerasenareddy Burru <veerasenareddy.burru@cavium.com>
Signed-off-by: NRaghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

adding support for ethtool --set-channels feature
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: NRaghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common octeon_setup_interrupt to lio_core.c
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: NRaghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common liquidio_msix_intr_handler to lio_core.c
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: NRaghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

added support for ethtool --set-ring feature
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common liquidio_setup_io_queues to lio_core.c
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common liquidio_napi_poll to lio_core.c
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common liquidio_napi_drv_callback to lio_core.c
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common liquidio_push_packet to lio_core.c
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Moving common octeon_setup_droq to lio_core.c
Signed-off-by: NIntiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>