Commit Graph

13196 Commits

Author SHA1 Message Date
Ivan Malov
dadff13793 net/sfc: support encap flow items in transfer rules
Add support for flow items VXLAN, Geneve and NVGRE to
MAE-specific RTE flow implementation.

Having support for these items implies the ability to insert
so-called outer MAE rules and refer to them in MAE action rules.
The patch takes care of all necessary facilities to do that.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
7a673e1a4a common/sfc_efx/base: support outer rule provisioning
Let the client insert / remove outer rules.
Let the client refer to an inserted outer rule in a match
specification of type ACTION.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
ed15d7f8e0 common/sfc_efx/base: validate and compare outer match specs
Let the client validate an outer match specification.
Let the client comprare classes of two outer match specifications.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
36d124c37d common/sfc_efx/base: add API to compare match specs
Match specification format and its size are not exposed to clients.
Provide an API to compare two match specifications.

A client would typically use this API to compare a match specification
of an outer rule being validated with match specifications of already
active outer rules (to make sure that rule class is supported).

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
0ec6faf41d common/sfc_efx/base: add MAE match field VNET ID for tunnels
Add MCDI-compatible enumeration for this field and
provide necessary mappings for it to be inserted
directly into mask-value pairs buffer.

VNET_ID can be used to serve the following match fields:
rte_flow_item_vxlan.vni, rte_flow_item_geneve.vni,
rte_flow_item_nvgre.tni

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
1efc26e1e0 common/sfc_efx/base: add MAE encap match fields
Add MCDI-compatible enumeration for these fields and
provide necessary mappings for them to be inserted
directly into mask-value pairs buffer.

These fields are meant to comprise a so-called outer
match specification; provide necessary definitions.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
891408c45a common/sfc_efx/base: indicate MAE support for encapsulation
MAE provides support for encapsulation. One needs to insert
a so-called outer rule, which can match outer packet fields,
to require that matching packets be parsed as tunnel frames
of a given type (VXLAN, Geneve, NVGRE). Then it is possible
to chain this rule with an action rule in order to match on
inner fields and carry out some actions on matching packets.

Report to clients what encapsulation types are supported by
MAE. Indicate the number of priority levels for outer rules.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
c50442b0a7 net/sfc: support flow item UDP in transfer rules
Add support for this flow item to MAE-specific RTE flow implementation.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
e0eb90cbf8 net/sfc: support flow item TCP in transfer rules
Add support for this flow item to MAE-specific RTE flow implementation.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
080845d3a8 common/sfc_efx/base: add MAE match fields for TCP and UDP
Add MCDI-compatible enumeration for these fields and
provide necessary mappings for them to be inserted
directly into mask-value pairs buffer.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
e191e0d51c net/sfc: support flow item IPv6 in transfer rules
Add support for this flow item to MAE-specific RTE flow implementation.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
d6192a7cca common/sfc_efx/base: add MAE match fields for IPv6
Add MCDI-compatible enumeration for these fields and
provide necessary mappings for them to be inserted
directly into mask-value pairs buffer.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
bcf8dda8ca net/sfc: support flow item IPv4 in transfer rules
Add support for this flow item to MAE-specific RTE flow implementation.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
afb4125433 common/sfc_efx/base: add MAE match fields for IPv4
Add MCDI-compatible enumeration for these fields and
provide necessary mappings for them to be inserted
directly into mask-value pairs buffer.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
900d0c1b71 net/sfc: support flow item VLAN in transfer rules
Add support for this flow item to MAE-specific RTE flow implementation.

In a pattern, a L2 item preceding an item VLAN must have
correct "type" ("inner_type") set depending on the total
number of VLAN tags (double-tagging is supported):

"pattern eth type is X / vlan / end",
X = 0x8100, or 0x88a8, or 0x9100, or 0x9200, or 0x9300

"pattern eth type is X / vlan inner_type is 0x8100 / vlan / end"
X = 0x88a8, or 0x9100, or 0x9200, or 0x9300

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
7a376918c2 common/sfc_efx/base: add MAE match fields for VLAN
Add MCDI-compatible enumeration for these fields and
provide necessary mappings for them to be inserted
directly into mask-value pairs buffer.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
33d96ca564 net/sfc: support flow item port ID in transfer rules
Add support for this flow item to MAE-specific RTE flow implementation.

The DPDK port must not relate to a different physical device.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
1fb65e4dae net/sfc: support flow action port ID in transfer rules
The action handler will use MAE action DELIVER with MPORT
of the PCIe function associated with a given DPDK port ID.
The DPDK port must not relate to a different physical device.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
1e7fbdf0ba net/sfc: support concept of switch domains/ports
A later patch will add support for RTE flow action PORT_ID
to MAE backend. The driver has to ensure that such actions
refer to RTE ethdev instances deployed on top of the same
physical device. Also, the driver needs a means to find
sibling RTE ethdev instances when parsing such actions.

In order to solve these problems, add a switch infrastructure
which allocates switch domains based on persistence of device
serial number string across switch ports included in a domain.
Explain mapping between RTE switch port IDs and MAE endpoints.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
e86b48aa46 net/sfc: add HW switch ID helpers
The driver will need a means to figure out relationship between
RTE ethdev instances and underlying HW switch entities. For now,
use board serial number string as a unique HW switch identifier.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
833cfcd590 common/sfc_efx/base: add API for querying board info
Riverhead boards can provide extended version information.
Implement facilities necessary to obtain it.
Add an API for querying board information.

A client driver may use this to discover which of its instances
relate to which physical boards, based on board serial number
persistence for a given physical board.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
312191e86e common/sfc_efx/base: refactor version / boot info get helper
Refactor MCDI helper for version information and boot status
retrieval; it should comprise two dedicated helper functions.

A later patch will extend and reuse version retrieval helper.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
0839236d03 net/sfc: support flow action drop in transfer rules
Effectively, the resulting action will be of type DELIVER, and
destination MPORT will be a properly constructed NULL value.
This will achieve the requested behaviour (no delivery).

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
bb024542ff common/sfc_efx/base: add API for adding action drop
Client drivers may need to request that matching traffic be dropped.
Add a dedicated API to support this. The API relies on action
DELIVER with properly constructed NULL MPORT argument.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
70f3cadce6 net/sfc: support flow actions PF and VF in transfer rules
The action handler will use MAE action DELIVER with MPORT of the PF/VF.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
2ada1448d8 net/sfc: support flow items PF and VF in transfer rules
Add support for these flow items to MAE-specific RTE flow implementation.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
097058033f common/sfc_efx/base: add API to get mport of PF/VF
PCIe functions have static MPORTs which can be utilised by
MAE rules as delivery destinations for matching traffic.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
4bee5ad547 common/sfc_efx/base: add named constant for invalid VF
This makes existing code clearer. Also, it will be used by a later patch.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
e7de2bcbe8 net/sfc: support flow action mark in MAE backend
The action handler will use MAE action MARK.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
83352289e1 common/sfc_efx/base: support adding mark action to set
This action can be added at any point before DELIVER.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
8a771e04db net/sfc: support flow action flag in MAE backend
The action handler will use MAE action FLAG.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
77da58888d common/sfc_efx/base: support adding flag action to set
This action can be added at any point before DELIVER.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
62c3a8b7e0 net/sfc: support VLAN push actions in MAE backend
A group of actions (OF_PUSH_VLAN, OF_VLAN_SET_VID and
OF_VLAN_SET_PCP) maps to MAE action VLAN_PUSH.

This action group is supported only for rules which have transfer
attribute, and can be requested once or twice per a rule.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
b61e717a83 net/sfc: add facilities to handle bundles of actions
There are MAE actions which do not have uniform counterparts
in terms of RTE flow. However, there are bundles of RTE flow
actions which can be considered as such counterparts.

Implement facilities to handle related RTE flow actions as
parts of a whole. These facilities will be used by a later
patch to add support for VLAN PUSH actions bundle.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
12cd7909ea common/sfc_efx/base: support adding VLAN push action
MAE supports pushing two tags, so this action can
be requested once or twice.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
9346bfa18b net/sfc: support flow action OF pop VLAN in MAE backend
This action is supported only for rules which have transfer attribute,
and can be requested once or twice per a rule.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
616b03e09e common/sfc_efx/base: support adding VLAN pop action to set
MAE supports stripping two tags, so this action can
be requested once or twice.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
041f22ec34 net/sfc: implement flow insert/remove in MAE backend
Exercise action set allocation / release and action rule
insertion / removal in order to let flow API callers
actually get created flows functioning.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
b4fac34715 common/sfc_efx/base: add MAE action rule provisioning APIs
Add APIs for action rule insert / remove operations.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
e61baa82e6 common/sfc_efx/base: add MAE action set provisioning APIs
The patch adds APIs for action set allocation / release.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
d487651090 net/sfc: support flow action PHY port in MAE backend
The action handler will use MAE action DELIVER with
MPORT of a given physical port.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
80019097c9 common/sfc_efx/base: support adding deliver action to set
Introduce a mechanism for adding actions to an action set and
add support for DELIVER action.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
0b90a1377d net/sfc: support flow item eth in MAE backend
Add support for this flow item to MAE-specific RTE flow implementation.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:25 +01:00
Ivan Malov
7055abad56 common/sfc_efx/base: add MAE match fields for Ethernet
Add MCDI-compatible enumeration for these fields and
provide necessary mappings for them to be inserted
directly into mask-value pairs buffer.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:24 +01:00
Ivan Malov
9ca45fd145 net/sfc: support flow item PHY PORT in MAE backend
Add support for this flow item to MAE-specific RTE flow implementation.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:24 +01:00
Ivan Malov
370ed675a9 common/sfc_efx/base: support setting PPORT in match spec
Add an API for setting mask-value pairs in a match specification
structure and add support for MAE field INGRESS_PORT of type PPORT.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:24 +01:00
Ivan Malov
662286ae61 net/sfc: add actions parsing stub to MAE backend
If parsing a flow results in an action set specification
identical to an already existing one, duplication will
be avoided by reusing the list entry of the latter.
Using an attach helper and a reference counter
is meant to serve the said purpose.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:24 +01:00
Ivan Malov
799889bada common/sfc_efx/base: add action set spec init/fini APIs
The engine is only able to carry out chosen actions on matching packets in
a strict order. No MCDI exists to identify supported actions and the order.
Still, the definition of the latter is available from the FW documentation.

The general idea is to define an action specification structure and supply
a client driver with APIs for adding actions individually, order-dependent.
A client driver is supposed to invoke an API on every action passed by the
application, and if an out-of-order action follows, the API will reject it.

Add an action set specification stub and supply initialise / finalise APIs.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:24 +01:00
Ivan Malov
8b61dd99a1 net/sfc: add verify method to flow validate path
The new method is needed to make sure that a flow being
validated will have a chance to be accepted by the FW.
MAE-specific implementation of the method should
compare the class of a rule being validated with
the corresponding classes of active rules, and,
if no matches found, make a request to the FW.
Support for the latter will be added in future.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:24 +01:00
Ivan Malov
bb71f7e0a3 common/sfc_efx/base: add match specs class comparison API
From MAE standpoint, a flow rule belongs to some class. Field capabilities
advertised by the FW provide a hint on whether changing a particular match
field value or its mask will affect the class of the rule. A client driver
can make use of the concept of a class by comparing a rule being validated
with already inserted ones so that if an existing rule with the same class
is encountered, it will become possible to skip making an explicit request
to the FW because the class of an already inserted rule is wittingly valid.

Implement an API for client drivers to carry out the said class comparison.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
2020-11-03 23:24:24 +01:00