The current implementation for contiguous TC check
is assuming that the UPs will be mapped to TCs in
a linear progressing fashion.  This is obviously
not always true.

Change the check to allow for various UP2TC mapping
configurations.
Signed-off-by: NDave Ertman <david.m.ertman@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

When there's a Tx timeout for a queue which belongs to a PFC enabled TC,
then it's not because the queue is hung but because PFC is in action.

In PFC, peer sends a pause frame for a specified period of time when its
buffer threshold is exceeded (due to congestion). Netdev on the other
hand checks if ACK is received within a specified time for a TX packet, if
not, it'll invoke the tx_timeout routine.
Signed-off-by: NAvinash JD <avinash.dayanand@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The variable name 'type' is not very descriptive. Replace instances of
those with a variable name that is more descriptive or replace it if not
needed.
Signed-off-by: NBruce Allan <bruce.w.allan@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

While testing DCB for a corner case in which mode is switched from IEEE to
CEE and pfc_ena bitmask unchanged then DCBX mode doesn't get updated.

This is happening because the function ice_dcb_get_mode() is called
in a "no change detected block" instead of "change detected block".
Signed-off-by: NAvinash JD <avinash.dayanand@intel.com>
Signed-off-by: NScott Register <scottx.register@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Sergei Shtylyov pointed out that two instances of parenthesis are not
needed, so remove them.
Suggested-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>

Add code to detect if DCB is in IEEE or CEE mode. Without this the code
will always report as IEEE mode which is incorrect and confuses the
user.
Signed-off-by: NAvinash Dayanand <avinash.dayanand@intel.com>
Signed-off-by: NScott Register <scottx.register@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Validate the inputs for SW DCB config received either via lldptool or pcap
file. And don't apply DCB for bad bandwidth inputs. Without this patch, any
config having bad inputs will cause the loss of link making PF unusable
even after driver reload. Recoverable only via system reboot.
Signed-off-by: NAvinash Dayanand <avinash.dayanand@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This is a collection of trivial fixes including fixing whitespace, typos,
function headers, reverse Christmas tree, etc.
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Formatting strings in print function calls (like dev_info, dev_err, etc.)
can exceed 80 columns without making checkpatch unhappy. So remove
newlines where applicable and make print statements more compact.
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The function ice_dcb_rebuild had some logic
flaws in it, and also didn't differentiate
between FW and SW modes needs.

For FW flow, the willing setting was being
forced to OFF and left that way.  Unwilling
in DCB FW mode is not a supported model.

Leave the config alone and use the return value
from the set command to determine if setting the
config was successful.

The SW DCB flow does not need to need to register
for MIB change events (as they are not used in
SW mode).

Use !is_sw_lldp checks to only perform FW specific
task while in FW mode.

Also adding a reapplication of the current DCB
config after a link event.  Some NVMs are not
maintaining their DCB configs across link events.
Signed-off-by: NDave Ertman <david.m.ertman@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Coverity reports an error that is not really an error; suppress it.
Signed-off-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Add code to query and set the number of channels on the primary VSI for a
PF. This is accessed from the 'ethtool -l' and 'ethtool -L' commands,
respectively.  Though the ice driver supports asymmetric queues report an
IRQ vector that has both Rx and Tx queues attached and is counted as a
'combined' channel.
Signed-off-by: NHenry Tieman <henry.w.tieman@intel.com>
Co-developed-by: NMaciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: NMaciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

We use &pf->dev->pdev all over the code. Add a simple
macro to do this for us. When multiple de-references
like this are being done add a local struct device
variable.
Signed-off-by: NBrett Creeley <brett.creeley@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

In situations where we alloc and free memory within the same function do
not use the devm_* variants; use regular alloc and free functions. Remove
any unused vars if there are no usages after these changes.

Also, replace an allocate and copy with kmemdup() and remove an
unnecessary memset() to 0 after a kzalloc().
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Move software LLDP configuration when FW DCBX is disabled to
ice_init_pf_dcb, since that is where the FW DCBX state is determined.
Remove this software LLDP configuration from ice_vsi_setup and
ice_set_priv_flags. Software configuration includes redirecting Rx LLDP
packets up the stack, when FW DCBX is not running.
Signed-off-by: NPaul Greenwalt <paul.greenwalt@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Implement interface layer for the DCBNL subsystem. These are the functions
to support the callbacks defined in the dcbnl_rtnl_ops struct. These
callbacks are going to be used to interface with the DCB settings of the
device. Implementation of dcb_nl set functions and supporting SW DCB
functions.
Signed-off-by: NDave Ertman <david.m.ertman@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Allow for rate limiting Tx queues. Bitrate is set in
Mbps(megabits per second).

Mbps max-rate is set for the queue via sysfs:
/sys/class/net/<iface>/queues/tx-<queue>/tx_maxrate
ex: echo 100 >/sys/class/net/ens7/queues/tx-0/tx_maxrate
    echo 200 >/sys/class/net/ens7/queues/tx-1/tx_maxrate
Note: A value of zero for tx_maxrate means disabled,
default is disabled.
Signed-off-by: NUsha Ketineni <usha.k.ketineni@intel.com>
Co-developed-by: NTarun Singh <tarun.k.singh@intel.com>
Signed-off-by: NTarun Singh <tarun.k.singh@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

DCB configuration flow needs to disable and enable only the PF (main)
VSI, so use ice_ena_vsi and ice_dis_vsi. To avoid the use of ifdef to
control the staticness of these functions, move them to ice_lib.c.

Also replace the allocate and copy of old_cfg to kmemdup() in
ice_pf_dcb_cfg().
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

If DCBx request non-contiguous TCs, then the driver will configure default
traffic class (TC0). This is done to prevent Tx hang since the driver
currently does not support non-contiguous TC.
Signed-off-by: NPaul Greenwalt <paul.greenwalt@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Attempt to request an optional device-specific DDP package file
(one with the PCIe Device Serial Number in its name so that different DDP
package files can be used on different devices). If the optional package
file exists, download it to the device. If not, download the default
package file.

Log an appropriate message based on whether or not a DDP package
file exists and the return code from the attempt to download it to the
device.  If the download fails and there is not already a package file on
the device, go into "Safe Mode" where some features are not supported.
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Add an additional boolean parameter to the ice_init_dcb
function.  This boolean controls if the LLDP MIB change
events are registered for.  Also, add a new function
defined ice_cfg_lldp_mib_change.  The additional function
is necessary to be able to register for LLDP MIB change
events after calling ice_init_dcb.  The net effect of these
two changes is to allow a delayed registration for MIB change
events so that the driver is not accepting events before it
is ready for them.
Signed-off-by: NDave Ertman <david.m.ertman@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Check the ICE_FLAG_DCB_CAPABLE before calling ice_init_pf_dcb.
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Remove code that enables DCB in initialization when SW LLDP is
activated. DCB flag is set or reset before in ice_init_pf_dcb
based on number of TCs. So there is not need to overwrite it.

Setting DCB without checking number of TCs can cause communication
problems with other cards. Host card sends packet with VLAN priority
tag, but client card doesn't strip this tag and ping doesn't work.
Signed-off-by: NMichal Swiatkowski <michal.swiatkowski@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

In the init path for DCB, the call to ice_init_dcb()
can return a non-zero value for either an actual
error, or due to the FW lldp engine being stopped.

We are currently treating all non-zero values only as
an indication that the FW LLDP engine is stopped.

Check for an actual error in the DCB init flow.
Signed-off-by: NDave Ertman <david.m.ertman@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch limits the max TCs set by the driver to the value provided by
the firmware as per the capabilities of the device. Otherwise, hard coding
to 8 TC max would fail the device configurations with more than 4 ports.
Signed-off-by: NUsha Ketineni <usha.k.ketineni@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch fixes the issue where port and PFC statistics counters are
incrementing at the wrong port with 4x25G cards.
Read the GLPRT port registers using lport parameter instead of pf_id to
update the statistics otherwise the pf_ids are flipped for ports 2 and 3
when read from the HW register PF_FUNC_RID and this is expected as per
hardware specification.
Signed-off-by: NUsha Ketineni <usha.k.ketineni@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The current flag name of "enable-fw-lldp" is a bit cumbersome.

Change priv-flag name to "fw-lldp-agent" with a value of on or
off.  This is more straight-forward in meaning.
Signed-off-by: NDave Ertman <david.m.ertman@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

In rebuild DCB desired_dcbx_cfg was copy to local_dcbx_cfg, but
if DCBX mode is IEEE desired_dcbx_cfg is not initialized by DCBX
config from FW. Change logic to copy config value only if mode is
set to CEE.

If driver copy desired_dcbx_cfg to local_dcbx_cfg in IEEE mode there
is problem with globr. System is frozen after two or more globr.
Signed-off-by: NMichal Swiatkowski <michal.swiatkowski@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Currently, only the DCBx status is taken into account to
determine if FW LLDP is possible.  But there are NVM version
coming out with DCBx enabled, and FW LLDP disabled.  This
is causing errors where the driver sees that DCBx is not
disabled, and then tries to register for LLDP MIB change
events, and fails.

Change the logic to detect both DCBx and LLDP states in the
FW engine.
Signed-off-by: NDave Ertman <david.m.ertman@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch fixes the set local MIB AQ call failures in the DCB rebuild path
by setting the defaults for the ETS recommended DCB configuration. Also,
willing bits for the DCB configuration needs to be set correctly. Resets
works fine in IEEE mode as the ETS recommended DCB configuration is
populated but not in CEE mode.
Without this patch, PFR causes the kernel hang in CEE mode.
Signed-off-by: NUsha Ketineni <usha.k.ketineni@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch mostly capitalizes abbreviations in code comments. Fixed some
typos and removed some unnecessary newlines as well.
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

For style consistency, use continue instead of an else block in
ice_pf_dcb_recfg.
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Add call to configure dropping egress LLDP packets in ice_vsi_setup
and remove the rule in ice_vsi_release.

Add calls to add/remove rule to route LLDP packets to default VSI when
FW LLDP engine is disabled/enabled and remove rule if applied during
ice_vsi_release.

In the function ice_add_eth_mac(), there is a line that hard codes the
filter info flag to TX. This is incorrect as this flag will be set by
the calling function that built the list of filters to add. So remove
the hard coded value.

This patch also contains a fix to stop treating the DCBx state of
"Not Started" as an error state that kicks DCB in SW mode. This will
address having non-cabled interfaces automatically go into SW mode
with the FW engine running.
Signed-off-by: NDave Ertman <david.m.ertman@intel.com>
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch fixes the LLDP MIB change event handling code by removing
the workarounds in the current code. Added ice_dcb_need_recfg() to
print the DCB configuration changes detected via MIB change event.
Signed-off-by: NUsha Ketineni <usha.k.ketineni@intel.com>
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

When disabling and enabling VSIs, there are a couple of flows
that recursively acquire the RTNL lock which causes a deadlock.
Fix that.
Signed-off-by: NDave Ertman <david.m.ertman@intel.com>
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Implement LLDP persistence across reboots, start and stop of LLDP agent.
Add additional parameter to ice_aq_start_lldp and ice_aq_stop_lldp.

Also change the ethtool private flag from "disable-fw-lldp" to
"enable-fw-lldp". This change will flip the boolean logic of the
functionality of the flag (on = enable, off = disable). The change
in name and functionality is to differentiate between the
pre-persistence and post-persistence states.
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch introduces a new function ice_dcb_rebuild which reinitializes
DCB after a reset.
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch adds a new function ice_update_dcb_stats to get DCB stats
from the hardware and ethtool support for displaying these stats.
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch introduces a new function ice_tx_prepare_vlan_flags_dcb to
insert 802.1p priority information into the VLAN header
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch adds a new function ice_vsi_cfg_dcb_rings which updates a
VSI's rings based on DCB traffic class information.
Signed-off-by: NAnirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>