ice: refactor RSS configuration

Refactor the driver to use a communication data structure for RSS
config. To do so we introduce the new ice_rss_hash_cfg struct, and then
pass it as an argument to several functions.

Also introduce enum ice_rss_cfg_hdr_type to specify a more granular and
flexible RSS configuration:

ICE_RSS_OUTER_HEADERS - take outer layer as RSS input set
ICE_RSS_INNER_HEADERS - take inner layer as RSS input set
ICE_RSS_INNER_HEADERS_W_OUTER_IPV4 - take inner layer as RSS input set for
                                     packet with outer IPV4
ICE_RSS_INNER_HEADERS_W_OUTER_IPV6 - take inner layer as RSS input set for
                                     packet with outer IPV6
ICE_RSS_ANY_HEADERS - try with outer first then inner (same as the
		      behaviour without this change)

Finally, move the virtchnl_rss_algorithm enum to be with the other RSS
related structures in the virtchnl.h file.

There should be no functional change due to this patch.

Reviewed-by: Wojciech Drewek <[email protected]>
Signed-off-by: Qi Zhang <[email protected]>
Co-developed-by: Jesse Brandeburg <[email protected]>
Signed-off-by: Jesse Brandeburg <[email protected]>
Co-developed-by: Ahmed Zaki <[email protected]>
Signed-off-by: Ahmed Zaki <[email protected]>
Signed-off-by: NipaLocal <nipa@local>

Author: qzhan16

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

@@ -2591,6 +2591,7 @@ static int
 ice_set_rss_hash_opt(struct ice_vsi *vsi, struct ethtool_rxnfc *nfc)
 {
 	struct ice_pf *pf = vsi->back;
+	struct ice_rss_hash_cfg cfg;
 	struct device *dev;
 	u64 hashed_flds;
 	int status;
@@ -2617,7 +2618,10 @@ ice_set_rss_hash_opt(struct ice_vsi *vsi, struct ethtool_rxnfc *nfc)
 		return -EINVAL;
 	}
 
-	status = ice_add_rss_cfg(&pf->hw, vsi->idx, hashed_flds, hdrs);
+	cfg.hash_flds = hashed_flds;
+	cfg.addl_hdrs = hdrs;
+	cfg.hdr_type = ICE_RSS_ANY_HEADERS;
+	status = ice_add_rss_cfg(&pf->hw, vsi->idx, &cfg);
 	if (status) {
 		dev_dbg(dev, "ice_add_rss_cfg failed, vsi num = %d, error = %d\n",
 			vsi->vsi_num, status);