Currently, the driver get packet type by parse the
L3_ID/L4_ID/OL3_ID/OL4_ID from Rx descriptor and then lookup multiple
tables, it's time consuming.
Now Kunpeng930 support advanced RXD layout, which:
1. Combine OL3_ID/OL4_ID to 8bit PTYPE filed, so the driver get packet
type by lookup only one table. Note: L3_ID/L4_ID become reserved
fields.
2. The 1588 timestamp located at Rx descriptor instead of query from
firmware.
3. The L3E/L4E/OL3E/OL4E will be zero when L3L4P is zero, so driver
could optimize the good checksum calculations (when L3E/L4E is zero
then mark PKT_RX_IP_CKSUM_GOOD/PKT_RX_L4_CKSUM_GOOD).
Considering compatibility, the firmware will report capability of
RXD advanced layout, the driver will identify and enable it by default.
This patch only provides basic function: identify and enable the RXD
advanced layout, and lookup ptype table if supported.
Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
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