The ionic interrupt model is based on interrupt control blocks
accessed through the PCI BAR.  Doorbell registers are used by
the driver to signal to the NIC that requests are waiting on
the message queues.  Interrupts are used by the NIC to signal
to the driver that answers are waiting on the completion queues.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

The LIF is the Logical Interface, which represents the external
connections.  The NIC can multiplex many LIFs to a single port,
but in most setups, LIF0 is the primary control for the port.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

The port management commands apply to the physical port
associated with the PCI device, which might be shared among
several logical interfaces.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

The ionic device has a small set of PCI registers, including a
device control and data space, and a large set of message
commands.

Also adds new DEVLINK_INFO_VERSION_GENERIC tags for
ASIC_ID, ASIC_REV, and FW.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds a basic driver framework for the Pensando IONIC
network device.  There is no functionality right now other than
the ability to load and unload.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

The current tag set is still rather small and needs a couple
more tags to help with ASIC identification and to have a
more generic FW version.

Cc: Jiri Pirko <jiri@resnulli.us>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

René van Dorst says:

====================
net: dsa: mt7530: Convert to PHYLINK and add support for port 5

1. net: dsa: mt7530: Convert to PHYLINK API
   This patch converts mt7530 to PHYLINK API.
2. dt-bindings: net: dsa: mt7530: Add support for port 5
3. net: dsa: mt7530: Add support for port 5
   These 2 patches adding support for port 5 of the switch.

v2->v3:
 * Removed 'status = "okay"' lines in patch #2
 * Change a port 5 setup message in a debug message in patch #3
 * Added ack-by and tested-by tags
v1->v2:
 * Mostly phylink improvements after review.
rfc -> v1:
 * Mostly phylink improvements after review.
 * Drop phy isolation patches. Adds no value for now.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Adding support for port 5.

Port 5 can muxed/interface to:
- internal 5th GMAC of the switch; can be used as 2nd CPU port or as
  extra port with an external phy for a 6th ethernet port.
- internal PHY of port 0 or 4; Used in most applications so that port 0
  or 4 is the WAN port and interfaces with the 2nd GMAC of the SOC.
Signed-off-by: René van Dorst <opensource@vdorst.com>
Tested-by: Frank Wunderlich <frank-w@public-files.de>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

MT7530 port 5 has many modes/configurations.
Update the documentation how to use port 5.
Signed-off-by: René van Dorst <opensource@vdorst.com>
Cc: devicetree@vger.kernel.org
Cc: Rob Herring <robh@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Convert mt7530 to PHYLINK API
Signed-off-by: René van Dorst <opensource@vdorst.com>
Tested-by: Frank Wunderlich <frank-w@public-files.de>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

First, for AUTONEG_DISABLE, we only need to modify MII_BMCR.

Second, add advertising parameter for rtl8152_set_speed(). Add
RTL_ADVERTISED_xxx for advertising parameter of rtl8152_set_speed().
Then, the advertising settings from ethtool could be saved.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Ioana Radulescu says:

====================
dpaa2-eth: Add new statistics counters

Recent firmware versions offer access to more DPNI statistics
counters. Add the relevant ones to ethtool interface stats.

Also we can now make use of a new counter for in flight egress frames
to avoid sleeping an arbitrary amount of time in the ndo_stop routine.

v2: in patch 2/3, treat separately the error case for unsupported
statistics pages
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Starting with firmware version MC10.18.0, a new counter for in flight
Tx frames is offered. Use it when bringing down the interface to
determine when all pending Tx frames have been processed by hardware
instead of sleeping a fixed amount of time.
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Recent firmware versions expose more  DPNI counters.
Export relevant ones via ethtool -S.
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

As we prepare to read more pages from the DPNI stat counters,
reorganize the code a bit to make it easier to extend.
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
100GbE Intel Wired LAN Driver Updates 2019-09-03

This series contains updates to ice driver only.

Anirudh adds the ability for the driver to handle EMP resets correctly
by adding the logic to the existing ice_reset_subtask().

Jeb fixes up the logic to properly free up the resources for a switch
rule whether or not it was successful in the removal.

Brett fixes up the reporting of ITR values to let the user know odd ITR
values are not allowed.  Fixes the driver to only disable VLAN pruning
on VLAN deletion when the VLAN being deleted is the last VLAN on the VF
VSI.

Chinh updates the driver to determine the TSA value from the priority
value when in CEE mode.

Bruce aligns the driver with the hardware specification by ensuring that
a PF reset is done as part of the unload logic.  Also update the driver
unloading field, based on the latest hardware specification, which
allows us to remove an unnecessary endian conversion.  Moves #defines
based on their need in the code.

Jesse adds the current state of auto-negotiation in the link up message.
In addition, adds additional information to inform the user of an issue
with the topology/configuration of the link.

Usha updates the driver to allow the maximum TCs that the firmware
supports, rather than hard coding to a set value.

Dave updates the DCB initialization flow to handle the case of an actual
error during DCB init.  Updated the driver to report the current stats,
even when the netdev is down, which aligns with our other drivers.

Mitch fixes the VF reset code flows to ensure that it properly calls
ice_dis_vsi_txq() to notify the firmware that the VF is being reset.

Michal fixes the driver so the DCB is not enabled when the SW LLDP is
activated, which was causing a communication issue with other NICs.  The
problem lies in that DCB was being enabled without checking the number
of TCs.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Saeed Mahameed says:

====================
mlx5-updates-2019-09-01  (Software steering support)

Abstract:
--------
Mellanox ConnetX devices supports packet matching, packet modification and
redirection. These functionalities are also referred to as flow-steering.
To configure a steering rule, the rule is written to the device owned
memory, this memory is accessed and cached by the device when processing
a packet.
Steering rules are constructed from multiple steering entries (STE).

Rules are configured using the Firmware command interface. The Firmware
processes the given driver command and translates them to STEs, then
writes them to the device memory in the current steering tables.
This process is slow due to the architecture of the command interface and
the processing complexity of each rule.

The highlight of this patchset is to cut the middle man (The firmware) and
do steering rules programming into device directly from the driver, with
no firmware intervention whatsoever.

Motivation:
-----------
Software (driver managed) steering allows for high rule insertion rates
compared to the FW steering described above, this is achieved by using
internal RDMA writes to the device owned memory instead of the slow
command interface to program steering rules.

Software (driver managed) steering, doesn't depend on new FW
for new steering functionality, new implementations can be done in the
driver skipping the FW layer.

Performance:
------------
The insertion rate on a single core using the new approach allows
programming ~300K rules per sec. (Done via direct raw test to the new mlx5
sw steering layer, without any kernel layer involved).

Test: TC L2 rules
33K/s with Software steering (this patchset).
5K/s  with FW and current driver.
This will improve OVS based solution performance.

Architecture and implementation details:
----------------------------------------
Software steering will be dynamically selected via devlink device
parameter. Example:
$ devlink dev param show pci/0000:06:00.0 name flow_steering_mode
          pci/0000:06:00.0:
          name flow_steering_mode type driver-specific
          values:
             cmode runtime value smfs

mlx5 software steering module a.k.a (DR - Direct Rule) is implemented
and contained in mlx5/core/steering directory and controlled by
MLX5_SW_STEERING kconfig flag.

mlx5 core steering layer (fs_core) already provides a shim layer for
implementing different steering mechanisms, software steering will
leverage that as seen at the end of this series.

When Software Steering for a specific steering domain
(NIC/RDMA/Vport/ESwitch, etc ..) is supported, it will cause rules
targeting this domain to be created using  SW steering instead of FW.

The implementation includes:
Domain - The steering domain is the object that all other object resides
    in. It holds the memory allocator, send engine, locks and other shared
    data needed by lower objects such as table, matcher, rule, action.
    Each domain can contain multiple tables. Domain is equivalent to
    namespaces e.g (NIC/RDMA/Vport/ESwitch, etc ..) as implemented
    currently in mlx5_core fs_core (flow steering core).

Table - Table objects are used for holding multiple matchers, each table
    has a level used to prevent processing loops. Packets are being
    directed to this table once it is set as the root table, this is done
    by fs_core using a FW command. A packet is being processed inside the
    table matcher by matcher until a successful hit, otherwise the packet
    will perform the default action.

Matcher - Matchers objects are used to specify the fields mask for
    matching when processing a packet. A matcher belongs to a table, each
    matcher can hold multiple rules, each rule with different matching
    values corresponding to the matcher mask. Each matcher has a priority
    used for rule processing order inside the table.

Action - Action objects are created to specify different steering actions
    such as count, reformat (encapsulate, decapsulate, ...), modify
    header, forward to table and many other actions. When creating a rule
    a sequence of actions can be provided to be executed on a successful
    match.

Rule - Rule objects are used to specify a specific match on packets as
    well as the actions that should be executed. A rule belongs to a
    matcher.

STE - This layer is used to hold the specific STE format for the device
    and to convert the requested rule to STEs. Each rule is constructed of
    an STE chain, Multiple rules construct a steering graph. Each node in
    the graph is a hash table containing multiple STEs. The index of each
    STE in the hash table is being calculated using a CRC32 hash function.

Memory pool - Used for managing and caching device owned memory for rule
    insertion. The memory is being allocated using DM (device memory) API.

Communication with device - layer for standard RDMA operation using  RC QP
    to configure the device steering.

Command utility - This module holds all of the FW commands that are
    required for SW steering to function.

Patch planning and files:
-------------------------
1) First patch, adds the support to Add flow steering actions to fs_cmd
shim layer.

2) Next 12 patch will add a file per each Software steering
functionality/module as described above. (See patches with title: DR, *)

3) Add CONFIG_MLX5_SW_STEERING for software steering support and enable
build with the new files

4) Next two patches will add the support for software steering in mlx5
steering shim layer
net/mlx5: Add API to set the namespace steering mode
net/mlx5: Add direct rule fs_cmd implementation

5) Last two patches will add the new devlink parameter to select mlx5
steering mode, will be valid only for switchdev mode for now.
Two modes are supported:
    1. DMFS - Device managed flow steering
    2. SMFS - Software/Driver managed flow steering.

    In the DMFS mode, the HW steering entities are created through the
    FW. In the SMFS mode this entities are created though the driver
    directly.

    The driver will use the devlink steering mode only if the steering
    domain supports it, for now SMFS will manages only the switchdev
    eswitch steering domain.

    User command examples:
    - Set SMFS flow steering mode::

        $ devlink dev param set pci/0000:06:00.0 name flow_steering_mode value "smfs" cmode runtime

    - Read device flow steering mode::

        $ devlink dev param show pci/0000:06:00.0 name flow_steering_mode
          pci/0000:06:00.0:
          name flow_steering_mode type driver-specific
          values:
             cmode runtime value smfs
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently if the VF adds a VLAN, VLAN pruning will be enabled for that VSI.
Also, when a VLAN gets deleted it will disable VLAN pruning even if other
VLAN(s) exists for the VF. Fix this by only disabling VLAN pruning on the
VF VSI when removing the last VF (i.e. vf->num_vlan == 0).
Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff 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: Michal Swiatkowski <michal.swiatkowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

There is currently a check in get_ndo_stats that
returns before updating stats if the VSI is down
or there are no Tx or Rx queues.  This causes the
netdev to report zero stats with the netdev is down.

Remove the check so that the behavior of reporting
stats is the same as it was in IXGBE.
Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

The call to ice_dis_vsi_txq() acts as the notification to the firmware
that the VF is being reset. Because of this, we need to make this call
every time we reset, regardless of whatever else we do to stop the Tx
queues.

Without this change, VF resets would fail to complete on interfaces that
were up and running.
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff 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: Dave Ertman <david.m.ertman@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff 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: Usha Ketineni <usha.k.ketineni@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Conventionally, if the #defines/other are not needed by other header
files being included, #includes are done first followed by #defines
and other stuff. Move the #defines before the #includes to follow this
convention.

Suggested by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

The driver needs to inform the user if there is an issue
with the topology / configuration of the link.
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Print the state of auto-negotiation when printing the Link
up message.  Adds new text to the "NIC Link is up" line like
Autoneg: <True | False>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

According to recent specification versions, the field in the Queue Shutdown
AdminQ command consisting of the "driver unloading" indication is not a 4
byte field (it is byte.bit 16.0).  Change it to a byte and remove the
unnecessary endian conversion.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

According to the specification, a PF Reset must be done as part of the
driver unload flow.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

In CEE mode, the TSA information can be derived from the reported
priority value.
Signed-off-by: Chinh T Cao <chinh.t.cao@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Currently if the user sets an odd value for [tx|rx]-usecs we align the
value because the hardware only understands ITR values in multiples of
2. This seems misleading because we are essentially telling the user
that the ITR value is odd, when in fact we have changed it internally.
Fix this by reporting that setting odd ITR values is not allowed.

Also, while making changes to ice_set_rc_coalesce() I noticed a bit of
code/error duplication. Make the necessary changes to remove the
duplication.
Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

We don't free s_rule if ice_aq_sw_rules() returns a non-zero status.  If
it returned a zero status, s_rule would be freed right after, so this
implies it should be freed within the scope of the function regardless.
Signed-off-by: Jeb Cramer <jeb.j.cramer@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

ice_reset_subtask needs to handle EMP resets as well, as EMP resets
can be triggered by the firmware. This patch adds the logic to do
this.
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Add new parameter (flow_steering_mode) to control the flow steering
mode of the driver.
Two modes are supported:
1. DMFS - Device managed flow steering
2. SMFS - Software/Driver managed flow steering.

In the DMFS mode, the HW steering entities are created through the
FW. In the SMFS mode this entities are created though the driver
directly.

The driver will use the devlink steering mode only if the steering
domain supports it, for now SMFS will manages only the switchdev eswitch
steering domain.

User command examples:
- Set SMFS flow steering mode::

    $ devlink dev param set pci/0000:06:00.0 name flow_steering_mode value "smfs" cmode runtime

- Read device flow steering mode::

    $ devlink dev param show pci/0000:06:00.0 name flow_steering_mode
      pci/0000:06:00.0:
      name flow_steering_mode type driver-specific
      values:
         cmode runtime value smfs
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

In case that flow steering mode of the driver is SMFS (Software Managed
Flow Steering), then use the DR (SW steering) API to create the steering
objects.

In addition, add a call to the set peer namespace when switchdev gets
devcom pair event. It is required to support VF LAG in SMFS.
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Add API to set the flow steering root namesapce mode.
Setting new mode should be called before any steering operation
is executed on the namespace.
This API is going to be used by steering users such switchdev.
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Add support to create flow steering objects
via direct rule API (SW steering).
New layer is added - fs_dr, this layer translates the command that
fs_core sends to the FW into direct rule API. In case that direct
rule is not supported in some feature then -EOPNOTSUPP is
returned.
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Add new mlx5 Kconfig flag to allow selecting software steering
support and compile all the steering files only if the flag is
selected.
Signed-off-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Expose APIs for direct rule managing to increase insertion rate by
bypassing the firmware.
Signed-off-by: Alex Vesker <valex@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

SW steering is capable of doing many steering functionalities
but there are still some functionalities which are not exposed
to upper layers and therefore performed by the FW.

This is the support for recalculating checksum using a hairpin QP.
The recalculation is required after a modify TTL action which skips
the needed CS calculation in HW.
Signed-off-by: Alex Vesker <valex@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Rules are the actual objects that tie matchers, header values and
actions. Each rule belongs to a matcher, which can hold multiple rules
sharing the same mask. Each rule is a specific set of values and
actions.
When a packet reaches a matcher it is being matched against the
matcher`s rules. In case of a match over a rule its actions will be
executed. Each rule object contains a set of STEs, where each STE is a
definition of match values and actions defined by the rule.
This file handles the rule operations and processing.
Signed-off-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>