diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/rx.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/rx.c | 387 |
1 files changed, 0 insertions, 387 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/rx.c b/drivers/net/wireless/iwlwifi/mvm/rx.c deleted file mode 100644 index e4930d5027d2..000000000000 --- a/drivers/net/wireless/iwlwifi/mvm/rx.c +++ /dev/null @@ -1,387 +0,0 @@ -/****************************************************************************** - * - * 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 - 2013 Intel Corporation. All rights reserved. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, - * USA - * - * 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 - 2013 Intel Corporation. All rights reserved. - * 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 "iwl-trans.h" - -#include "mvm.h" -#include "fw-api.h" - -/* - * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler - * - * Copies the phy information in mvm->last_phy_info, it will be used when the - * actual data will come from the fw in the next packet. - */ -int iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - struct iwl_rx_packet *pkt = rxb_addr(rxb); - - memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info)); - mvm->ampdu_ref++; - return 0; -} - -/* - * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211 - * - * Adds the rxb to a new skb and give it to mac80211 - */ -static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm, - struct ieee80211_hdr *hdr, u16 len, - u32 ampdu_status, - struct iwl_rx_cmd_buffer *rxb, - struct ieee80211_rx_status *stats) -{ - struct sk_buff *skb; - unsigned int hdrlen, fraglen; - - /* 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; - } - /* If frame is small enough to fit in skb->head, pull it completely. - * If not, only pull ieee80211_hdr so that splice() or TCP coalesce - * are more efficient. - */ - hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr); - - 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); - } - - memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); - - ieee80211_rx_ni(mvm->hw, skb); -} - -/* - * iwl_mvm_calc_rssi - calculate the rssi in dBm - * @phy_info: the phy information for the coming packet - */ -static int iwl_mvm_calc_rssi(struct iwl_mvm *mvm, - struct iwl_rx_phy_info *phy_info) -{ - int rssi_a, rssi_b, rssi_a_dbm, rssi_b_dbm, max_rssi_dbm; - int rssi_all_band_a, rssi_all_band_b; - u32 agc_a, agc_b, max_agc; - u32 val; - - /* Find max rssi among 2 possible receivers. - * These values are measured by the Digital Signal Processor (DSP). - * They should stay fairly constant even as the signal strength varies, - * if the radio's Automatic Gain Control (AGC) is working right. - * AGC value (see below) will provide the "interesting" info. - */ - val = le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_AGC_IDX]); - agc_a = (val & IWL_OFDM_AGC_A_MSK) >> IWL_OFDM_AGC_A_POS; - agc_b = (val & IWL_OFDM_AGC_B_MSK) >> IWL_OFDM_AGC_B_POS; - max_agc = max_t(u32, agc_a, agc_b); - - val = le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_RSSI_AB_IDX]); - rssi_a = (val & IWL_OFDM_RSSI_INBAND_A_MSK) >> IWL_OFDM_RSSI_A_POS; - rssi_b = (val & IWL_OFDM_RSSI_INBAND_B_MSK) >> IWL_OFDM_RSSI_B_POS; - rssi_all_band_a = (val & IWL_OFDM_RSSI_ALLBAND_A_MSK) >> - IWL_OFDM_RSSI_ALLBAND_A_POS; - rssi_all_band_b = (val & IWL_OFDM_RSSI_ALLBAND_B_MSK) >> - IWL_OFDM_RSSI_ALLBAND_B_POS; - - /* - * dBm = rssi dB - agc dB - constant. - * Higher AGC (higher radio gain) means lower signal. - */ - rssi_a_dbm = rssi_a - IWL_RSSI_OFFSET - agc_a; - rssi_b_dbm = rssi_b - IWL_RSSI_OFFSET - agc_b; - max_rssi_dbm = max_t(int, rssi_a_dbm, rssi_b_dbm); - - IWL_DEBUG_STATS(mvm, "Rssi In A %d B %d Max %d AGCA %d AGCB %d\n", - rssi_a_dbm, rssi_b_dbm, max_rssi_dbm, agc_a, agc_b); - - return max_rssi_dbm; -} - -/* - * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format - * @mvm: the mvm object - * @hdr: 80211 header - * @stats: status in mac80211's format - * @rx_pkt_status: status coming from fw - * - * returns non 0 value if the packet should be dropped - */ -static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm, - struct ieee80211_hdr *hdr, - struct ieee80211_rx_status *stats, - u32 rx_pkt_status) -{ - if (!ieee80211_has_protected(hdr->frame_control) || - (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == - RX_MPDU_RES_STATUS_SEC_NO_ENC) - return 0; - - /* packet was encrypted with unknown alg */ - if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) == - RX_MPDU_RES_STATUS_SEC_ENC_ERR) - return 0; - - switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) { - case RX_MPDU_RES_STATUS_SEC_CCM_ENC: - /* alg is CCM: check MIC only */ - if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK)) - return -1; - - stats->flag |= RX_FLAG_DECRYPTED; - IWL_DEBUG_WEP(mvm, "hw decrypted CCMP successfully\n"); - return 0; - - case RX_MPDU_RES_STATUS_SEC_TKIP_ENC: - /* Don't drop the frame and decrypt it in SW */ - if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK)) - return 0; - /* fall through if TTAK OK */ - - case RX_MPDU_RES_STATUS_SEC_WEP_ENC: - if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK)) - return -1; - - stats->flag |= RX_FLAG_DECRYPTED; - return 0; - - default: - IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status); - } - - return 0; -} - -/* - * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler - * - * Handles the actual data of the Rx packet from the fw - */ -int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - struct ieee80211_hdr *hdr; - struct ieee80211_rx_status rx_status = {}; - struct iwl_rx_packet *pkt = rxb_addr(rxb); - struct iwl_rx_phy_info *phy_info; - struct iwl_rx_mpdu_res_start *rx_res; - u32 len; - u32 ampdu_status; - u32 rate_n_flags; - u32 rx_pkt_status; - - phy_info = &mvm->last_phy_info; - rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data; - hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res)); - len = le16_to_cpu(rx_res->byte_count); - rx_pkt_status = le32_to_cpup((__le32 *) - (pkt->data + sizeof(*rx_res) + len)); - - memset(&rx_status, 0, sizeof(rx_status)); - - /* - * drop the packet if it has failed being decrypted by HW - */ - if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, &rx_status, rx_pkt_status)) { - IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n", - rx_pkt_status); - return 0; - } - - if ((unlikely(phy_info->cfg_phy_cnt > 20))) { - IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n", - phy_info->cfg_phy_cnt); - return 0; - } - - if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) || - !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) { - IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status); - return 0; - } - - /* This will be used in several places later */ - rate_n_flags = le32_to_cpu(phy_info->rate_n_flags); - - /* rx_status carries information about the packet to mac80211 */ - rx_status.mactime = le64_to_cpu(phy_info->timestamp); - rx_status.device_timestamp = le32_to_cpu(phy_info->system_timestamp); - rx_status.band = - (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? - IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; - rx_status.freq = - ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel), - rx_status.band); - /* - * TSF as indicated by the fw is at INA time, but mac80211 expects the - * TSF at the beginning of the MPDU. - */ - /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/ - - /* Find max signal strength (dBm) among 3 antenna/receiver chains */ - rx_status.signal = iwl_mvm_calc_rssi(mvm, phy_info); - - IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status.signal, - (unsigned long long)rx_status.mactime); - - /* - * "antenna number" - * - * It seems that the antenna field in the phy flags value - * is actually a bit field. This is undefined by radiotap, - * it wants an actual antenna number but I always get "7" - * for most legacy frames I receive indicating that the - * same frame was received on all three RX chains. - * - * I think this field should be removed in favor of a - * new 802.11n radiotap field "RX chains" that is defined - * as a bitmask. - */ - rx_status.antenna = (le16_to_cpu(phy_info->phy_flags) & - RX_RES_PHY_FLAGS_ANTENNA) - >> RX_RES_PHY_FLAGS_ANTENNA_POS; - - /* set the preamble flag if appropriate */ - if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE)) - rx_status.flag |= RX_FLAG_SHORTPRE; - - if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) { - /* - * We know which subframes of an A-MPDU belong - * together since we get a single PHY response - * from the firmware for all of them - */ - rx_status.flag |= RX_FLAG_AMPDU_DETAILS; - rx_status.ampdu_reference = mvm->ampdu_ref; - } - - /* 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.flag |= RX_FLAG_80MHZ; - break; - case RATE_MCS_CHAN_WIDTH_160: - rx_status.flag |= RX_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_HT_MSK) { - rx_status.flag |= RX_FLAG_HT; - rx_status.rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; - } else if (rate_n_flags & RATE_MCS_VHT_MSK) { - 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; - } else { - rx_status.rate_idx = - iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, - rx_status.band); - } - - iwl_mvm_pass_packet_to_mac80211(mvm, hdr, len, ampdu_status, - rxb, &rx_status); - return 0; -} - -/* - * iwl_mvm_rx_statistics - STATISTICS_NOTIFICATION handler - * - * TODO: This handler is implemented partially. - * It only gets the NIC's temperature. - */ -int iwl_mvm_rx_statistics(struct iwl_mvm *mvm, - struct iwl_rx_cmd_buffer *rxb, - struct iwl_device_cmd *cmd) -{ - struct iwl_rx_packet *pkt = rxb_addr(rxb); - struct iwl_notif_statistics *stats = (void *)&pkt->data; - struct mvm_statistics_general_common *common = &stats->general.common; - - if (mvm->temperature != le32_to_cpu(common->temperature)) { - mvm->temperature = le32_to_cpu(common->temperature); - iwl_mvm_tt_handler(mvm); - } - - return 0; -} |