ice: report hash type such as L2/L3/L4

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The hardware is reporting the type of the hash used for RSS
as a PTYPE field in the receive descriptor. Use this value to set
the skb packet hash type by extending the hash type table to
cover all 10-bits of possible values (requiring some variables
to be changed from u8 to u16), and then use that table to convert
to one of the possible values in enum pkt_hash_types.

While we're here, remove the unused ptype struct value, which
makes table init easier for the zero entries, and use ranged
initializer to remove a bunch of code (works with gcc and clang).

Without this change, the kernel will recalculate the hash in software,
which can consume extra CPU cycles.

Co-developed-by: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

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This commit is contained in:

Jesse Brandeburg 2021-02-23 15:47:05 -08:00 • committed by Tony Nguyen

parent 8fe088bd4f

commit dda90cb90a

5 changed files with 50 additions and 126 deletions

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147

drivers/net/ethernet/intel/ice/ice_lan_tx_rx.h

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2

drivers/net/ethernet/intel/ice/ice_txrx.c

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23

drivers/net/ethernet/intel/ice/ice_txrx_lib.c

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2

drivers/net/ethernet/intel/ice/ice_txrx_lib.h

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2

drivers/net/ethernet/intel/ice/ice_xsk.c

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