octeontx2-af: Fixes static warnings

Fixes smatch static tool warning reported by smatch tool.

rvu_npc_hash.c:1232 rvu_npc_exact_del_table_entry_by_id() error:
uninitialized symbol 'drop_mcam_idx'.

rvu_npc_hash.c:1312 rvu_npc_exact_add_table_entry() error:
uninitialized symbol 'drop_mcam_idx'.

rvu_npc_hash.c:1391 rvu_npc_exact_update_table_entry() error:
uninitialized symbol 'hash_index'.

rvu_npc_hash.c:1428 rvu_npc_exact_promisc_disable() error:
uninitialized symbol 'drop_mcam_idx'.

rvu_npc_hash.c:1473 rvu_npc_exact_promisc_enable() error:
uninitialized symbol 'drop_mcam_idx'.

otx2_dmac_flt.c:191 otx2_dmacflt_update() error: 'rsp'
dereferencing possible ERR_PTR()

otx2_dmac_flt.c:60 otx2_dmacflt_add_pfmac() error: 'rsp'
dereferencing possible ERR_PTR()

Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

octeontx2-pf: Add support for exact match table.

NPC exact match table can support more entries than RPM
dmac filters. This requires field size of DMAC filter count
and index to be increased.

Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

octeontx2: Modify mbox request and response structures

Exact match table modification requires wider fields as it has
more number of slots to fill in. Modifying an entry in exact match
table may cause hash collision and may be required to delete entry
from 4-way 2K table and add to fully associative 32 entry CAM table.

Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Revert "Merge branch 'octeontx2-af-next'"

This reverts commit 2ef8e39f58f08589ab035223c2687830c0eba30f, reversing
changes made to e7ce9fc9ad38773b660ef663ae98df4f93cb6a37.

There are build warnings here which break the normal
build due to -Werror. Ratheesh was nice enough to quickly
follow up with fixes but didn't hit all the warnings I
see on GCC 12 so to unlock net-next from taking patches
let get this series out for now.

Link: https://lore.kernel.org/r/20220707013201.1372433-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

octeontx2-pf: Add support for exact match table.

NPC exact match table can support more entries than RPM
dmac filters. This requires field size of DMAC filter count
and index to be increased.

Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

octeontx2: Modify mbox request and response structures

Exact match table modification requires wider fields as it has
more number of slots to fill in. Modifying an entry in exact match
table may cause hash collision and may be required to delete entry
from 4-way 2K table and add to fully associative 32 entry CAM table.

Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

octeontx2-pf: Fix inconsistent license text

Fixed inconsistent license text across the netdev
drivers.

Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

octeontx2-pf: Fix assigned error return value that is never used

Currently when the call to otx2_mbox_alloc_msg_cgx_mac_addr_update fails
the error return variable rc is being assigned -ENOMEM and does not
return early. rc is then re-assigned and the error case is not handled
correctly. Fix this by returning -ENOMEM rather than assigning rc.

Addresses-Coverity: ("Unused value")
Fixes: 79d2be385e9e ("octeontx2-pf: offload DMAC filters to CGX/RPM block")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

octeontx2-pf: offload DMAC filters to CGX/RPM block

DMAC filtering can be achieved by either NPC MCAM rules or
CGX/RPM MAC filters. Currently we are achieving this by NPC
MCAM rules. This patch offloads DMAC filters to CGX/RPM MAC
filters instead of NPC MCAM rules. Offloading DMAC filter to
CGX/RPM block helps in reducing traffic to NPC block and
save MCAM rules

Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>