iwlwifi: mvm: add 9000 series RX processing (780e87c2) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/net/wireless/intel/iwlwifi/mvm/Makefile

+1 −1

Original line number	Diff line number	Diff line
		obj-$(CONFIG_IWLMVM) += iwlmvm.o
		iwlmvm-y += fw.o mac80211.o nvm.o ops.o phy-ctxt.o mac-ctxt.o
		iwlmvm-y += utils.o rx.o tx.o binding.o quota.o sta.o sf.o
		iwlmvm-y += utils.o rx.o rxmq.o tx.o binding.o quota.o sta.o sf.o
		iwlmvm-y += scan.o time-event.o rs.o
		iwlmvm-y += power.o coex.o coex_legacy.o
		iwlmvm-y += tt.o offloading.o tdls.o

drivers/net/wireless/intel/iwlwifi/mvm/fw-api-rx.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -287,11 +287,17 @@ enum iwl_rx_mpdu_status {
		IWL_RX_MPDU_STATUS_KEY_ERROR = BIT(4),
		IWL_RX_MPDU_STATUS_ICV_OK = BIT(5),
		IWL_RX_MPDU_STATUS_MIC_OK = BIT(6),
		/* TODO - verify this is the correct value */
		IWL_RX_MPDU_RES_STATUS_TTAK_OK = BIT(7),
		IWL_RX_MPDU_STATUS_SEC_MASK = 0x7 << 8,
		IWL_RX_MPDU_STATUS_SEC_NONE = 0x0 << 8,
		IWL_RX_MPDU_STATUS_SEC_WEP = 0x1 << 8,
		IWL_RX_MPDU_STATUS_SEC_CCM = 0x2 << 8,
		IWL_RX_MPDU_STATUS_SEC_TKIP = 0x3 << 8,
		/* TODO - define IWL_RX_MPDU_STATUS_SEC_EXT_ENC - this is a stub */
		IWL_RX_MPDU_STATUS_SEC_EXT_ENC = 0x4 << 8,
		/* TODO - define IWL_RX_MPDU_STATUS_SEC_GCM - this is a stub */
		IWL_RX_MPDU_STATUS_SEC_GCM = 0x5 << 8,
		IWL_RX_MPDU_STATUS_DECRYPTED = BIT(11),
		IWL_RX_MPDU_STATUS_WEP_MATCH = BIT(12),
		IWL_RX_MPDU_STATUS_EXT_IV_MATCH = BIT(13),

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -1135,6 +1135,9 @@ bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
		void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm mvm, struct iwl_rx_cmd_buffer rxb);
		void iwl_mvm_rx_rx_mpdu(struct iwl_mvm mvm, struct napi_struct napi,
		struct iwl_rx_cmd_buffer *rxb);
		void iwl_mvm_rx_phy_cmd_mq(struct iwl_mvm mvm, struct iwl_rx_cmd_buffer rxb);
		void iwl_mvm_rx_mpdu_mq(struct iwl_mvm mvm, struct napi_struct napi,
		struct iwl_rx_cmd_buffer *rxb, int queue);
		void iwl_mvm_rx_tx_cmd(struct iwl_mvm mvm, struct iwl_rx_cmd_buffer rxb);
		void iwl_mvm_rx_ba_notif(struct iwl_mvm mvm, struct iwl_rx_cmd_buffer rxb);
		void iwl_mvm_rx_ant_coupling_notif(struct iwl_mvm *mvm,

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

+3 −3

Original line number	Diff line number	Diff line
		@@ -836,9 +836,9 @@ static void iwl_mvm_rx_mq(struct iwl_op_mode *op_mode,
		struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);

		if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD))
		iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
		iwl_mvm_rx_mpdu_mq(mvm, napi, rxb, 0);
		else if (pkt->hdr.cmd == REPLY_RX_PHY_CMD)
		iwl_mvm_rx_rx_phy_cmd(mvm, rxb);
		iwl_mvm_rx_phy_cmd_mq(mvm, rxb);
		else
		iwl_mvm_rx_common(mvm, rxb, pkt);
		}
		@@ -1489,7 +1489,7 @@ static void iwl_mvm_rx_mq_rss(struct iwl_op_mode *op_mode,
		{
		struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);

		iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
		iwl_mvm_rx_mpdu_mq(mvm, napi, rxb, queue);
		}

		static const struct iwl_op_mode_ops iwl_mvm_ops_mq = {

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

0 → 100644

+372 −0

Original line number	Diff line number	Diff line
		/******************************************************************************
		*
		* This file is provided under a dual BSD/GPLv2 license. When using or
		* redistributing this file, you may do so under either license.
		*
		* GPL LICENSE SUMMARY
		*
		* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
		* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
		* Copyright(c) 2015 Intel Deutschland GmbH
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of version 2 of the GNU General Public License as
		* published by the Free Software Foundation.
		*
		* This program is distributed in the hope that it will be useful, but
		* WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		* General Public License for more details.
		*
		* The full GNU General Public License is included in this distribution
		* in the file called COPYING.
		*
		* Contact Information:
		* Intel Linux Wireless <ilw@linux.intel.com>
		* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
		*
		* BSD LICENSE
		*
		* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
		* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
		* Copyright(c) 2015 Intel Deutschland GmbH
		* All rights reserved.
		*
		* Redistribution and use in source and binary forms, with or without
		* modification, are permitted provided that the following conditions
		* are met:
		*
		* * Redistributions of source code must retain the above copyright
		* notice, this list of conditions and the following disclaimer.
		* * Redistributions in binary form must reproduce the above copyright
		* notice, this list of conditions and the following disclaimer in
		* the documentation and/or other materials provided with the
		* distribution.
		* * Neither the name Intel Corporation nor the names of its
		* contributors may be used to endorse or promote products derived
		* from this software without specific prior written permission.
		*
		* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		*****************************************************************************/
		#include <linux/etherdevice.h>
		#include <linux/skbuff.h>
		#include "iwl-trans.h"
		#include "mvm.h"
		#include "fw-api.h"
		#include "fw-dbg.h"

		void iwl_mvm_rx_phy_cmd_mq(struct iwl_mvm mvm, struct iwl_rx_cmd_buffer rxb)
		{
		mvm->ampdu_ref++;

		#ifdef CONFIG_IWLWIFI_DEBUGFS
		if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
		spin_lock(&mvm->drv_stats_lock);
		mvm->drv_rx_stats.ampdu_count++;
		spin_unlock(&mvm->drv_stats_lock);
		}
		#endif
		}

		static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
		struct napi_struct *napi,
		struct sk_buff *skb,
		struct ieee80211_hdr *hdr, u16 len,
		u32 ampdu_status, u8 crypt_len,
		struct iwl_rx_cmd_buffer *rxb)
		{
		unsigned int hdrlen, fraglen;

		/* If frame is small enough to fit in skb->head, pull it completely.
		* If not, only pull ieee80211_hdr (including crypto if present, and
		* an additional 8 bytes for SNAP/ethertype, see below) so that
		* splice() or TCP coalesce are more efficient.
		*
		* Since, in addition, ieee80211_data_to_8023() always pull in at
		* least 8 bytes (possibly more for mesh) we can do the same here
		* to save the cost of doing it later. That still doesn't pull in
		* the actual IP header since the typical case has a SNAP header.
		* If the latter changes (there are efforts in the standards group
		* to do so) we should revisit this and ieee80211_data_to_8023().
		*/
		hdrlen = (len <= skb_tailroom(skb)) ? len :
		sizeof(*hdr) + crypt_len + 8;

		memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
		fraglen = len - hdrlen;

		if (fraglen) {
		int offset = (void *)hdr + hdrlen -
		rxb_addr(rxb) + rxb_offset(rxb);

		skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
		fraglen, rxb->truesize);
		}

		ieee80211_rx_napi(mvm->hw, skb, napi);
		}

		static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
		struct iwl_rx_mpdu_desc *desc,
		struct ieee80211_rx_status *rx_status)
		{
		int energy_a, energy_b, energy_c, max_energy;

		energy_a = desc->energy_a;
		energy_a = energy_a ? -energy_a : S8_MIN;
		energy_b = desc->energy_b;
		energy_b = energy_b ? -energy_b : S8_MIN;
		energy_c = desc->energy_c;
		energy_c = energy_c ? -energy_c : S8_MIN;
		max_energy = max(energy_a, energy_b);
		max_energy = max(max_energy, energy_c);

		IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
		energy_a, energy_b, energy_c, max_energy);

		rx_status->signal = max_energy;
		rx_status->chains = 0; /* TODO: phy info */
		rx_status->chain_signal[0] = energy_a;
		rx_status->chain_signal[1] = energy_b;
		rx_status->chain_signal[2] = energy_c;
		}

		static u32 iwl_mvm_rx_crypto(struct iwl_mvm mvm, struct ieee80211_hdr hdr,
		struct ieee80211_rx_status *stats,
		struct iwl_rx_mpdu_desc *desc, int queue,
		u8 *crypt_len)
		{
		u16 status = le16_to_cpu(desc->status);

		if (!ieee80211_has_protected(hdr->frame_control) \|\|
		(status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
		IWL_RX_MPDU_STATUS_SEC_NONE)
		return 0;

		/* TODO: handle packets encrypted with unknown alg */

		switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) {
		case IWL_RX_MPDU_STATUS_SEC_CCM:
		case IWL_RX_MPDU_STATUS_SEC_GCM:
		/* alg is CCM: check MIC only */
		if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
		return -1;

		stats->flag \|= RX_FLAG_DECRYPTED;
		*crypt_len = IEEE80211_CCMP_HDR_LEN;
		return 0;
		case IWL_RX_MPDU_STATUS_SEC_TKIP:
		/* Don't drop the frame and decrypt it in SW */
		if (!(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK))
		return 0;

		*crypt_len = IEEE80211_TKIP_IV_LEN;
		/* fall through if TTAK OK */
		case IWL_RX_MPDU_STATUS_SEC_WEP:
		if (!(status & IWL_RX_MPDU_STATUS_ICV_OK))
		return -1;

		stats->flag \|= RX_FLAG_DECRYPTED;
		if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
		IWL_RX_MPDU_STATUS_SEC_WEP)
		*crypt_len = IEEE80211_WEP_IV_LEN;
		return 0;
		case IWL_RX_MPDU_STATUS_SEC_EXT_ENC:
		if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
		return -1;
		stats->flag \|= RX_FLAG_DECRYPTED;
		return 0;
		default:
		IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status);
		}

		return 0;
		}

		static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
		struct sk_buff *skb,
		struct iwl_rx_mpdu_desc *desc)
		{
		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
		struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);

		if (mvmvif->features & NETIF_F_RXCSUM &&
		desc->l3l4_flags & cpu_to_le16(IWL_RX_L3L4_IP_HDR_CSUM_OK) &&
		desc->l3l4_flags & cpu_to_le16(IWL_RX_L3L4_TCP_UDP_CSUM_OK))
		skb->ip_summed = CHECKSUM_UNNECESSARY;
		}

		void iwl_mvm_rx_mpdu_mq(struct iwl_mvm mvm, struct napi_struct napi,
		struct iwl_rx_cmd_buffer *rxb, int queue)
		{
		struct ieee80211_rx_status *rx_status;
		struct iwl_rx_packet *pkt = rxb_addr(rxb);
		struct iwl_rx_mpdu_desc desc = (void )pkt->data;
		struct ieee80211_hdr hdr = (void )(desc + 1);
		u32 len = le16_to_cpu(desc->mpdu_len);
		u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags);
		struct ieee80211_sta *sta = NULL;
		struct sk_buff *skb;
		u32 ampdu_status;
		u8 crypt_len = 0;

		/* Dont use dev_alloc_skb(), we'll have enough headroom once
		* ieee80211_hdr pulled.
		*/
		skb = alloc_skb(128, GFP_ATOMIC);
		if (!skb) {
		IWL_ERR(mvm, "alloc_skb failed\n");
		return;
		}

		rx_status = IEEE80211_SKB_RXCB(skb);

		if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc, queue, &crypt_len)) {
		kfree_skb(skb);
		return;
		}

		/*
		* Keep packets with CRC errors (and with overrun) for monitor mode
		* (otherwise the firmware discards them) but mark them as bad.
		*/
		if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) \|\|
		!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) {
		IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n",
		le16_to_cpu(desc->status));
		rx_status->flag \|= RX_FLAG_FAILED_FCS_CRC;
		}

		rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise);
		rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise);
		rx_status->band = desc->channel > 14 ? IEEE80211_BAND_5GHZ :
		IEEE80211_BAND_2GHZ;
		rx_status->freq = ieee80211_channel_to_frequency(desc->channel,
		rx_status->band);
		iwl_mvm_get_signal_strength(mvm, desc, rx_status);

		rcu_read_lock();

		if (le16_to_cpu(desc->status) & IWL_RX_MPDU_STATUS_SRC_STA_FOUND) {
		u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK;

		if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) {
		sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
		if (IS_ERR(sta))
		sta = NULL;
		}
		} else if (!is_multicast_ether_addr(hdr->addr2)) {
		/*
		* This is fine since we prevent two stations with the same
		* address from being added.
		*/
		sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
		}

		if (sta) {
		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);

		/*
		* We have tx blocked stations (with CS bit). If we heard
		* frames from a blocked station on a new channel we can
		* TX to it again.
		*/
		if (unlikely(mvm->csa_tx_block_bcn_timeout))
		iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);

		rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);

		if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
		ieee80211_is_beacon(hdr->frame_control)) {
		struct iwl_fw_dbg_trigger_tlv *trig;
		struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
		bool trig_check;
		s32 rssi;

		trig = iwl_fw_dbg_get_trigger(mvm->fw,
		FW_DBG_TRIGGER_RSSI);
		rssi_trig = (void *)trig->data;
		rssi = le32_to_cpu(rssi_trig->rssi);

		trig_check =
		iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
		trig);
		if (trig_check && rx_status->signal < rssi)
		iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
		}

		/* TODO: multi queue TCM */

		if (ieee80211_is_data(hdr->frame_control))
		iwl_mvm_rx_csum(sta, skb, desc);
		}

		rcu_read_unlock();

		/*
		* TODO: PHY info.
		* Verify we don't have the information in the MPDU descriptor and
		* that it is not needed.
		* Make sure for monitor mode that we are on default queue, update
		* ampdu_ref and the rest of phy info then
		*/

		/* Set up the HT phy flags */
		switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
		case RATE_MCS_CHAN_WIDTH_20:
		break;
		case RATE_MCS_CHAN_WIDTH_40:
		rx_status->flag \|= RX_FLAG_40MHZ;
		break;
		case RATE_MCS_CHAN_WIDTH_80:
		rx_status->vht_flag \|= RX_VHT_FLAG_80MHZ;
		break;
		case RATE_MCS_CHAN_WIDTH_160:
		rx_status->vht_flag \|= RX_VHT_FLAG_160MHZ;
		break;
		}
		if (rate_n_flags & RATE_MCS_SGI_MSK)
		rx_status->flag \|= RX_FLAG_SHORT_GI;
		if (rate_n_flags & RATE_HT_MCS_GF_MSK)
		rx_status->flag \|= RX_FLAG_HT_GF;
		if (rate_n_flags & RATE_MCS_LDPC_MSK)
		rx_status->flag \|= RX_FLAG_LDPC;
		if (rate_n_flags & RATE_MCS_HT_MSK) {
		u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
		RATE_MCS_STBC_POS;
		rx_status->flag \|= RX_FLAG_HT;
		rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
		rx_status->flag \|= stbc << RX_FLAG_STBC_SHIFT;
		} else if (rate_n_flags & RATE_MCS_VHT_MSK) {
		u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
		RATE_MCS_STBC_POS;
		rx_status->vht_nss =
		((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
		RATE_VHT_MCS_NSS_POS) + 1;
		rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
		rx_status->flag \|= RX_FLAG_VHT;
		rx_status->flag \|= stbc << RX_FLAG_STBC_SHIFT;
		if (rate_n_flags & RATE_MCS_BF_MSK)
		rx_status->vht_flag \|= RX_VHT_FLAG_BF;
		} else {
		rx_status->rate_idx =
		iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
		rx_status->band);
		}

		/* TODO: PHY info - update ampdu queue statistics (for debugfs) */
		/* TODO: PHY info - gscan */

		iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, hdr, len, ampdu_status,
		crypt_len, rxb);
		}