--- /dev/null
+/******************************************************************************
+ *
+ * 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);
+}
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff