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Implement the devlink e-switch encapsulation control set and get
callbacks. Apply the value set by the user on the switchdev offloads
mode when creating the fast FDB table where offloaded rules will be set.
Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Refactor the creation of the fast path FDB table that holds the
offloaded rules in SRIOV switchdev mode into it's own function.
This will be used in the next patch to be able and re-create the
table under different settings without going through legacy mode.
This patch doesn't change any functionality.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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The labels were out of order, so it either could result in an Oops or a
leak.
Fixes: 48935bbb7ae8 ("net/mlx5e: IPoIB, Add netdevice profile skeleton")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When there is no FID set for a specific packet, the HW will drop it.
However, by default these packets are useful to be delivered to CPU as
it can inspect them and program HW accordingly. So add this trap.
This would only ever happen when port is enslaved to an OVS master.
Otherwise, packets would be dropped during VLAN / STP filtering,
before FID classification.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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>From now on, a port can become a slave of OVS master. All vlans
are enabled, STP state is set to "forwarding". It is up to the OVS
userspace daemon to setup the flows either in kernel or in HW using TC
flower offload.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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So far, mlxsw_sp_port_vlan_set range is limited by
MLXSW_REG_SPVM_REC_MAX_COUNT. In spectrum_switchdev code this is
wrapped up by a helper function which actually does multiple calls
to FW for bigger ranges. Move the code into mlxsw_sp_port_vlan_set
and use it always. That allows caller not to care about the range.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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HW requires the FID to be valid in order for the forward action to work.
So regardless of the current FID validity, just set the dummy FID which
would do the trick.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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For forwarding using ACL action, HW needs a valid FID to be setup. It
does not actually use it, so it can be any valid FID. So create a dummy
FID only for this purpose.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement part of multipurpose Virtual Router and Forwarding Domain
Action that takes care of setting up FID. We need to use it to be able
to forward packets using ACL action when no FID is associated on RX.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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gcc 4.8.4 complains that mlx4_SW2HW_MPT_wrapper() uses an uninitialized
'mpt' variable:
drivers/net/ethernet/mellanox/mlx4/resource_tracker.c: In function 'mlx4_SW2HW_MPT_wrapper':
drivers/net/ethernet/mellanox/mlx4/resource_tracker.c:2802:12: warning: 'mpt' may be used uninitialized in this function [-Wmaybe-uninitialized]
mpt->mtt = mtt;
I think this warning is a false complaint. mpt is only used when
mr_res_start_move_to() return zero, and in all such cases it initializes
mpt. But apparently gcc cannot see that.
Initialize mpt to avoid the warning.
Signed-off-by: Greg Thelen <gthelen@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently the driver support only ethernet eswitch, and we want to
protect downstream IPoIB netdev from trying to access it in IB link.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement IPoIB RX SKB handler.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In order to have different RX handler per profile, fix and refactor the
current code to take the rx handler directly from the netdevice profile
rather than computing it on runtime as it was done with the switchdev
mode representor rx handler.
This will also remove the current wrong assumption in mlx5e_alloc_rq
code that mlx5e_priv->ppriv is of the type vport_rep.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement mlx5e's IPoIB SKB transmit using the helper functions provided
by mlx5e ethernet tx flow, the only difference in the code between
mlx5e_xmit and mlx5i_xmit is that IPoIB has some extra fields to fill
(UD datagram segment) in the TX descriptor (WQE) and it doesn't need to
have any vlan handling.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Break current mlx5e xmit flow into smaller blocks (helper functions)
in order to reuse them for IPoIB SKB transmission.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Create IPoIB underlay QP needed by the IPoIB netdevice profile for RSS
and TX HW context to perform on IPoIB traffic.
Reset the underlay QP on dev_uninit ndo to stop IPoIB traffic going
through this QP when the ULP IPoIB decides to cleanup.
Implement attach/detach mcast RDMA netdev callbacks for later RDMA
netdev use.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement open/close of IPoIB netdevice ndos using mlx5e's
channels API to manage data path resources (RQs/SQs/CQs).
Set IPoIB netdev address on dev_init ndo.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Modify mlx5e tis creation function to accept underlay qp number, which
will be needed by IPoIB.
Implement mlx5i (IPoIB) tx init/cleanup netdevice profile flows to
create one TIS with the IPoIB underlay qp, for IPoIB TX SQs.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Like the mlx5e ethernet mode, on IPoIB mode we need to create RX steering
tables, but IPoIB do not require MAC and VLAN steering tables so the
only tables we create in here are:
1. TTC Table (Traffic Type Classifier table for RSS steering)
2. ARFS Table (for accelerated RFS support)
Creation of those tables is identical to mlx5e ethernet mode, hence the
use of mlx5e_create_ttc_table and mlx5e_arfs_create_tables.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement IPoIB RX RSS (RQTs and TIRs) HW objects creation,
All we do here is simply reuse the mlx5e implementation to create
direct and indirect (RSS) steering HW objects.
For that we just expose
mlx5e_{create,destroy}_{direct,indirect}_{rqt,tir} functions into en.h
and call them from ipoib.c in init/cleanup_rx IPoIB netdevice profile
callbacks.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Create mlx5e IPoIB netdevice profile skeleton in the new ipoib.c
file with empty implementation.
Downstream patches will provide the full mlx5 rdma netdevice acceleration
support for IPoIB into this new file, by using the mlx5e netdevice
profile and new mlx5_channels APIs and infrastructures.
Same as already done in mlx5e NIC netdevice and switchdev mode VF
representors.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In preparation for mlx5e RDMA net_device support, here we generalize
mlx5e_attach/detach in a way that those functions will be agnostic
to link type. For that we move ethernet specific NIC net device logic out
of those functions into {nic,rep}_{enable/disable} mlx5e NIC and
representor profiles callbacks.
Also some of the logic was moved only to NIC profile since it is not right
to have this logic for representor net device (e.g. set port MTU).
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Get the relevant capabilities if supports ipoib_enhanced_offloads and
init the flow steering table accordingly.
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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IB flow tables need the underlay qp to perform flow steering.
Here we change the API of the flow tables creation to accept the
underlay QP number as a parameter in order to support IB (IPoIB) flow
steering.
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Trivial conversion as only one vector is supported, but at least we
lose the useless msix_entry member in the per-device structure.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Tested-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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RX moderation default parameters shouldn't be set in
mlx5e_build_rx_cq_param since it would reset the values every time on
netdev open/close. Instead, it should be set in
mlx5e_set_rx_cq_mode_params which is called on driver load only.
Fixes: 6a9764efb255 ("net/mlx5e: Isolate open_channels from priv->params")
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Reuse the code for mlx5e_alloc_cq and mlx5e_alloc_drop_cq, as they
have a similar flow.
Prior to this patch, the CQEs in the "drop CQ" were not initialized,
fixed
it with the shared flow of alloc CQ. This is not a critical bug as the
RQ connected to this CQ never moved to RTS, but still better to have
this right.
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Add the board id (PSID) to the firmware-version field
in the ethtool -i (driver information).
The PSID is shown in parentheses, next to the fw-version.
$ ethtool -i ens6
firmware-version: 12.14.1101 (MT_2190110032)
Signed-off-by: Inbar Karmy <inbark@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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FW version should be reported as X.Y.ZZZZ, add leading zeroes to sub
minor in order to fix it.
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Make mlx5e_modify_rqs_vsd a static function and remove from en.h in
order to reduce redundant exposure of functions.
Signed-off-by: Guy Ergas <guye@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Add support for rx-fcs flag from ethtool.
In case this flag is set, update all RQs to scatter the FCS data into
the packet.
Signed-off-by: Guy Ergas <guye@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Rename the ConnectX-5 PCIe 4.0 to be ConnectX-5 Ex.
Also add the upcoming ConnectX-6 and it's VF IDs to the list.
Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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mlx4 is the only driver in the tree making a point to recompute
shinfo->gso_segs.
Lets remove superfluous code.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 9008ae074885 ("net/mlx5e: Minimize mlx5e_{open/close}_locked")
copied the calls to netif_set_real_num_{tx,rx}_queues from
mlx5e_open_locked to mlx5e_activate_priv_channels and wraps them in an
if condition to test for netdev->real_num_{tx,rx}_queues.
But netdev->real_num_rx_queues is conditionally compiled in if CONFIG_SYSFS
is set. Without CONFIG_SYSFS the build fails:
drivers/net/ethernet/mellanox/mlx5/core/en_main.c: In function 'mlx5e_activate_priv_channels':
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2515:12: error: 'struct net_device' has no member named 'real_num_rx_queues'; did you mean 'real_num_tx_queues'?
Fix this by unconditionally call netif_set_real_num{tx,rx}_queues like before
commit 9008ae074885.
Fixes: 9008ae074885 ("net/mlx5e: Minimize mlx5e_{open/close}_locked")
Signed-off-by: Tobias Regnery <tobias.regnery@gmail.com>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Mostly simple cases of overlapping changes (adding code nearby,
a function whose name changes, for example).
Signed-off-by: David S. Miller <davem@davemloft.net>
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drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c: In function 'mlx5e_set_rxfh':
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1067: error: unknown field 'rss' specified in initializer
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1067: warning: missing braces around initializer
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1067: warning: (near initialization for 'rrp.<anonymous>')
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1068: error: unknown field 'rss' specified in initializer
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1069: warning: excess elements in struct initializer
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c:1069: warning: (near initialization for 'rrp')
gcc-4.4.4 has issues with anonymous union initializers. Work around this.
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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drivers/net/ethernet/mellanox/mlx5/core/en_main.c: In function 'mlx5e_redirect_rqts':
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2210: error: unknown field 'rqn' specified in initializer
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2211: warning: missing braces around initializer
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2211: warning: (near initialization for 'direct_rrp.<anonymous>')
drivers/net/ethernet/mellanox/mlx5/core/en_main.c: In function 'mlx5e_redirect_rqts_to_channels':
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2227: error: unknown field 'rss' specified in initializer
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2227: warning: missing braces around initializer
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2227: warning: (near initialization for 'rrp.<anonymous>')
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2227: warning: initialization makes integer from pointer without a cast
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2228: error: unknown field 'rss' specified in initializer
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2229: warning: excess elements in struct initializer
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2229: warning: (near initialization for 'rrp')
drivers/net/ethernet/mellanox/mlx5/core/en_main.c: In function 'mlx5e_redirect_rqts_to_drop':
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2238: error: unknown field 'rqn' specified in initializer
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2239: warning: missing braces around initializer
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:2239: warning: (near initialization for 'drop_rrp.<anonymous>')
gcc-4.4.4 has issues with anonymous union initializers. Work around this.
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux
Or Gerlitz says:
====================
mlx5e-pedit 2017-03-28
This series adds support for offloading modifications of packet headers using
ConnectX-5 HW header re-write as an action applied during packet steering.
The offloaded SW mechanism is TC's pedit action. The offloading is
supported for E-Switch steering of VF traffic in the SRIOV
switchdev mode and for NIC (non eswitch) RX.
One use-case for this offload on virtual networks, is when the hypervisor
implements flow based router such as Open-Stack's DVR, where L2 headers
of guest packets re-written with routers' MAC addresses and the IP TTL
is decremented.
Another use case (which can be applied in parallel with routing) is
stateless NAT where guest L3/L4 headers are re-written.
The series is built as follows: the 1st six patches are preperations which
don't yet add new functionality, patches 7-8 add the FW APIs (data-structures
and commands) for header re-write, and patch nine allows offloading driver
to access pedit keys.
The 10th patch is somehow the core of the series, where we translate from
the pedit way to represent set of header modification elements to the FW
API for that same matter.
Once a set of HW modification is established, we register it with the FW
and get a modify header ID. When this ID is used with an action during
packet steering, the HW applies the header modification on the packet.
Patches 11 and 12 implement the above logic as an offload for pedit action
for the NIC and E-Switch use-cases.
I'd like to thanks Elijah Shakkour <elijahs@mellanox.com> for implementing
and helping me testing this functionality on HW simulator, before it could
be done with FW.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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In NETDEV_CHANGEUPPER event the upper_info field is valid
only when linking is true. Otherwise it should be ignored.
Fixes: 7907f23adc18 (net/mlx5: Implement RoCE LAG feature)
Signed-off-by: Talat Batheesh <talatb@mellanox.com>
Reviewed-by: Aviv Heller <avivh@mellanox.com>
Reviewed-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement dpipe's table ops for erif table which provide:
1. Getting the entries in the table with the associate values.
- match on "mlxsw_meta:erif_index"
- action on "mlxsw_meta:forwared_out"
2. Synchronize the hardware in case of enabling/disabling counters which
mean removing erif counters from all interfaces.
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add rif helper function to access the rif index and rif devices ifindex.
This functions will be used by dpipe in order to dump the rif table.
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add support for counter allocation on router interfaces. The allocation
depends on the counter state of relevant table. In case the counting is
disabled or no counters left the counter index will be set as invalid.
Also a counter pool for router allocation is added.
Signed-off-by: Arakdi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The RICNT register retrieves per port performance counter. It will be
used to query the router interfaces statistics.
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add definition for egress router interface table. This table describes
the final part in the routing pipeline. This table matches the egress
interface index (rif index, which is set by the previous stages and
determine the out port) and makes the decision of forwarding the packet
towards the L2 logic or dropping it.
The metadata header is added to represent this internal information.
The rif index field is mapped logically to netdevice ifindex.
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add placeholder for dpipe. Support for specific tables and headers will
be introduced in following patches. The headers are shared between all
mlxsw_sp instances.
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Update RITR for counter support. This allows adding counters for
ASIC's router ports.
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This includes calling the parsing code that translates from pedit
speak to the HW API, allocation (deallocation) of a modify header
context and setting the modify header id associated with this
context to the FTE of that flow.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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This includes calling the parsing code that translates from pedit
speak to the HW API, allocation (deallocation) of a modify header
context and setting the modify header id associated with this
context to the FTE of that flow.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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Parse/translate a set of TC pedit actions to be formed in the HW API format.
User-space provides set of keys where each one of them is made of: command (add or
set), header-type, byte offset within that header along with a 32 bit mask and value.
The mask dictates what bits in the 32 bit word that starts on the offset we should
be dealing with, but under negative polarity (unset bits are to be modified).
We do a 1st pass over the set of keys while using the header-type and offset to
fill the masks and the values into a data-structure containting all the
supported network headers.
We then do a 2nd pass over the set of fields to re-write supported by the HW,
where for each such candidate field, we use the masks filled on the 1st pass to
realize if we should offloading re-write it.
In case offloading is required, we fill a HW descriptor with the following:
(1) the header field to modify
(2) the bit offset within the field from where to modify (set command only)
(3) the value to set/add
(4) the length in bits 1...32 to modify (set command only)
Note that it's possible for a given pedit mask to dictate modifying the
same header field multiple times or to modify multiple header fields.
Currently such combinations are not supported for offloading, hence, for set
commands, the offset within the field is always zero, and the length to modify
is the field size.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-by: Amir Vadai <amir@vadai.me>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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