ice_rss_cfg_raw_symm(9)

💖 NAME 💖

okay so bestie, ice_rss_cfg_raw_symm(9) is a Kernel API Manual page, and its whole thing is configuring symmetric RSS for a raw parser profile. that's the name, that's the vibe, no cap 💅

✨ SYNOPSIS ✨

void ice_rss_cfg_raw_symm (struct ice_hw *hw , const struct
       ice_parser_profile *prof , u64 prof_id );

🎀 ARGUMENTS 🎀

• hw — the device HW. literally the hardware baddie this is working with 💖
• prof — the parser profile describing extracted FV (field vector) entries. it's giving "here's what we're pulling out" ✨
• prof_id — the RSS profile identifier used to program symmetry registers. yes bestie, this is the ID for the symmetry-register programming 🎀

🦋 DESCRIPTION 🦋

The routine scans the parser profile's FV entries and looks for direction-sensitive pairs (L3 src/dst, L4 src/dst). When a pair is found, it programs XOR-based symmetry so that flows hash identically regardless of packet direction. This preserves CPU affinity for the same 5-tuple. slay, honestly 🔥

🌸 NOTES 🌸

• The size of each logical field (IPv4/IPv6 address, L4 port) is expressed in units of ICE_FLOW_FV_EXTRACT_SZ so we can step across fv[] correctly. yes, the units matter, bestie 🫶
• We guard against out-of-bounds access before looking at fv[i + len]. no feral memory reads on this page, periodt 💀

these notes are not just cute decoration — they're the whole "don't mess up the stepping" situation 🙈

⭐ SEE ALSO ⭐

Kernel file: ./drivers/net/ethernet/intel/ice/ice_flow.c

the related-function group chat is: ice_flow_val_hdrs(9), ice_flow_calc_seg_sz(9), ice_flow_proc_seg_hdrs(9), ice_flow_xtract_fld(9), ice_flow_xtract_raws(9), ice_flow_create_xtrct_seq(9), ice_flow_proc_segs(9), ice_flow_find_prof_conds(9), ice_flow_find_prof_id(9), ice_flow_rem_entry_sync(9), ice_flow_add_prof_sync(9), ice_flow_rem_prof_sync(9), ice_flow_assoc_prof(9), ice_flow_disassoc_prof(9), ice_flow_set_parser_prof(9), ice_flow_add_prof(9), ice_flow_rem_prof(9), ice_flow_add_entry(9), ice_flow_rem_entry(9), ice_flow_set_fld_ext(9), ice_flow_set_fld(9), ice_flow_add_fld_raw(9), ice_flow_rem_vsi_prof(9), ice_flow_set_rss_seg_info(9), ice_rem_vsi_rss_list(9), ice_rem_vsi_rss_cfg(9), ice_get_rss_hdr_type(9), ice_rem_rss_list(9), ice_add_rss_list(9), ice_rss_config_xor_word(9), ice_rss_config_xor(9), ice_rss_set_symm(9), ice_rss_update_raw_symm(9), ice_add_rss_cfg_sync(9), ice_add_rss_cfg(9), ice_rem_rss_cfg_sync(9), ice_rem_rss_cfg(9), ice_add_avf_rss_cfg(9), ice_set_rss_cfg_symm(9), ice_replay_rss_cfg(9), ice_get_rss_cfg(9).

okay that's the whole page, bestie 🫶 — the source/version situation points at ./drivers/net/ethernet/intel/ice, the date is October 2026, and this icon is ice_rss_cfg_raw_symm(9) signing off 💅✨