drivers/net/wireless/intel/iwlwifi/mvm/link.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/intel/iwlwifi/mvm/link.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/intel/iwlwifi/mvm/link.c
Extension
.c
Size
8991 bytes
Lines
298
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (!active && vif->type == NL80211_IFTYPE_STATION) {
			iwl_mvm_stop_session_protection(mvm, vif);
			if (link_info->csa_block_tx) {
				cmd.block_tx = 1;
				link_info->csa_block_tx = false;
			}
		}
	}

	cmd.link_id = cpu_to_le32(link_info->fw_link_id);

	/* The phy_id, link address and listen_lmac can be modified only until
	 * the link becomes active, otherwise they will be ignored.
	 */
	phyctxt = link_info->phy_ctxt;
	if (phyctxt)
		cmd.phy_id = cpu_to_le32(phyctxt->id);
	else
		cmd.phy_id = cpu_to_le32(FW_CTXT_INVALID);
	cmd.mac_id = cpu_to_le32(mvmvif->id);

	memcpy(cmd.local_link_addr, link_conf->addr, ETH_ALEN);

	cmd.active = cpu_to_le32(active);

	if (vif->type == NL80211_IFTYPE_ADHOC && link_conf->bssid)
		memcpy(cmd.ibss_bssid_addr, link_conf->bssid, ETH_ALEN);

	iwl_mvm_set_fw_basic_rates(mvm, vif, link_info,
				   &cmd.cck_rates, &cmd.ofdm_rates);

	cmd.cck_short_preamble = cpu_to_le32(link_conf->use_short_preamble);
	cmd.short_slot = cpu_to_le32(link_conf->use_short_slot);

	/* The fw does not distinguish between ht and fat */
	ht_flag = LINK_PROT_FLG_HT_PROT | LINK_PROT_FLG_FAT_PROT;
	iwl_mvm_set_fw_protection_flags(mvm, vif, link_conf,
					&cmd.protection_flags,
					ht_flag, LINK_PROT_FLG_TGG_PROTECT);

	iwl_mvm_set_fw_qos_params(mvm, vif, link_conf, cmd.ac,
				  &cmd.qos_flags);


	cmd.bi = cpu_to_le32(link_conf->beacon_int);
	cmd.dtim_interval = cpu_to_le32(link_conf->beacon_int *
					link_conf->dtim_period);

	if (!link_conf->he_support || iwlwifi_mod_params.disable_11ax ||
	    (vif->type == NL80211_IFTYPE_STATION && !vif->cfg.assoc)) {
		changes &= ~LINK_CONTEXT_MODIFY_HE_PARAMS;
		goto send_cmd;
	}

	cmd.htc_trig_based_pkt_ext = link_conf->htc_trig_based_pkt_ext;

	if (link_conf->uora_exists) {
		cmd.rand_alloc_ecwmin =
			link_conf->uora_ocw_range & 0x7;
		cmd.rand_alloc_ecwmax =
			(link_conf->uora_ocw_range >> 3) & 0x7;
	}

	/* ap_sta may be NULL if we're disconnecting */
	if (changes & LINK_CONTEXT_MODIFY_HE_PARAMS && mvmvif->ap_sta) {
		struct ieee80211_link_sta *link_sta =
			link_sta_dereference_check(mvmvif->ap_sta, link_id);

		if (!WARN_ON(!link_sta) && link_sta->he_cap.has_he &&
		    link_sta->he_cap.he_cap_elem.mac_cap_info[5] &
		    IEEE80211_HE_MAC_CAP5_OM_CTRL_UL_MU_DATA_DIS_RX)
			cmd.ul_mu_data_disable = 1;
	}

	/* TODO  how to set ndp_fdbk_buff_th_exp? */

	if (iwl_mvm_set_fw_mu_edca_params(mvm, mvmvif->link[link_id],
					  &cmd.trig_based_txf[0])) {
		flags |= LINK_FLG_MU_EDCA_CW;
		flags_mask |= LINK_FLG_MU_EDCA_CW;
	}

	if (changes & LINK_CONTEXT_MODIFY_EHT_PARAMS) {
		struct ieee80211_chanctx_conf *ctx;
		struct cfg80211_chan_def *def = NULL;

		rcu_read_lock();
		ctx = rcu_dereference(link_conf->chanctx_conf);
		if (ctx)
			def = iwl_mvm_chanctx_def(mvm, ctx);

Annotation

Implementation Notes