1402364162
Port of internal scan to iwl3945 missed introduction of iwl3945_get_single_channel_for_scan. Fix the following bug by introducing the iwl3945_get_single_channel_for_scan http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=2208 Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
1504 lines
44 KiB
C
1504 lines
44 KiB
C
/******************************************************************************
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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*****************************************************************************/
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#include <linux/etherdevice.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include "iwl-dev.h"
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#include "iwl-core.h"
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#include "iwl-io.h"
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#include "iwl-helpers.h"
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#include "iwl-agn-hw.h"
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#include "iwl-agn.h"
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#include "iwl-sta.h"
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static inline u32 iwlagn_get_scd_ssn(struct iwl5000_tx_resp *tx_resp)
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{
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return le32_to_cpup((__le32 *)&tx_resp->status +
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tx_resp->frame_count) & MAX_SN;
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}
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static int iwlagn_tx_status_reply_tx(struct iwl_priv *priv,
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struct iwl_ht_agg *agg,
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struct iwl5000_tx_resp *tx_resp,
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int txq_id, u16 start_idx)
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{
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u16 status;
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struct agg_tx_status *frame_status = &tx_resp->status;
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struct ieee80211_tx_info *info = NULL;
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struct ieee80211_hdr *hdr = NULL;
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u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
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int i, sh, idx;
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u16 seq;
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if (agg->wait_for_ba)
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IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");
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agg->frame_count = tx_resp->frame_count;
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agg->start_idx = start_idx;
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agg->rate_n_flags = rate_n_flags;
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agg->bitmap = 0;
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/* # frames attempted by Tx command */
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if (agg->frame_count == 1) {
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/* Only one frame was attempted; no block-ack will arrive */
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status = le16_to_cpu(frame_status[0].status);
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idx = start_idx;
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/* FIXME: code repetition */
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IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
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agg->frame_count, agg->start_idx, idx);
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info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
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info->status.rates[0].count = tx_resp->failure_frame + 1;
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info->flags &= ~IEEE80211_TX_CTL_AMPDU;
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info->flags |= iwl_tx_status_to_mac80211(status);
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iwlagn_hwrate_to_tx_control(priv, rate_n_flags, info);
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/* FIXME: code repetition end */
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IWL_DEBUG_TX_REPLY(priv, "1 Frame 0x%x failure :%d\n",
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status & 0xff, tx_resp->failure_frame);
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IWL_DEBUG_TX_REPLY(priv, "Rate Info rate_n_flags=%x\n", rate_n_flags);
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agg->wait_for_ba = 0;
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} else {
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/* Two or more frames were attempted; expect block-ack */
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u64 bitmap = 0;
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int start = agg->start_idx;
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/* Construct bit-map of pending frames within Tx window */
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for (i = 0; i < agg->frame_count; i++) {
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u16 sc;
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status = le16_to_cpu(frame_status[i].status);
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seq = le16_to_cpu(frame_status[i].sequence);
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idx = SEQ_TO_INDEX(seq);
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txq_id = SEQ_TO_QUEUE(seq);
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if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
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AGG_TX_STATE_ABORT_MSK))
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continue;
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IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
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agg->frame_count, txq_id, idx);
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hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
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if (!hdr) {
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IWL_ERR(priv,
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"BUG_ON idx doesn't point to valid skb"
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" idx=%d, txq_id=%d\n", idx, txq_id);
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return -1;
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}
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sc = le16_to_cpu(hdr->seq_ctrl);
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if (idx != (SEQ_TO_SN(sc) & 0xff)) {
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IWL_ERR(priv,
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"BUG_ON idx doesn't match seq control"
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" idx=%d, seq_idx=%d, seq=%d\n",
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idx, SEQ_TO_SN(sc),
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hdr->seq_ctrl);
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return -1;
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}
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IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
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i, idx, SEQ_TO_SN(sc));
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sh = idx - start;
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if (sh > 64) {
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sh = (start - idx) + 0xff;
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bitmap = bitmap << sh;
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sh = 0;
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start = idx;
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} else if (sh < -64)
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sh = 0xff - (start - idx);
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else if (sh < 0) {
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sh = start - idx;
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start = idx;
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bitmap = bitmap << sh;
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sh = 0;
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}
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bitmap |= 1ULL << sh;
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IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
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start, (unsigned long long)bitmap);
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}
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agg->bitmap = bitmap;
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agg->start_idx = start;
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IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
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agg->frame_count, agg->start_idx,
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(unsigned long long)agg->bitmap);
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if (bitmap)
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agg->wait_for_ba = 1;
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}
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return 0;
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}
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void iwl_check_abort_status(struct iwl_priv *priv,
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u8 frame_count, u32 status)
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{
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if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
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IWL_ERR(priv, "TODO: Implement Tx flush command!!!\n");
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}
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}
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static void iwlagn_rx_reply_tx(struct iwl_priv *priv,
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struct iwl_rx_mem_buffer *rxb)
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{
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struct iwl_rx_packet *pkt = rxb_addr(rxb);
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u16 sequence = le16_to_cpu(pkt->hdr.sequence);
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int txq_id = SEQ_TO_QUEUE(sequence);
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int index = SEQ_TO_INDEX(sequence);
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struct iwl_tx_queue *txq = &priv->txq[txq_id];
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struct ieee80211_tx_info *info;
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struct iwl5000_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
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u32 status = le16_to_cpu(tx_resp->status.status);
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int tid;
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int sta_id;
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int freed;
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if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
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IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
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"is out of range [0-%d] %d %d\n", txq_id,
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index, txq->q.n_bd, txq->q.write_ptr,
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txq->q.read_ptr);
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return;
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}
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info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
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memset(&info->status, 0, sizeof(info->status));
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tid = (tx_resp->ra_tid & IWL50_TX_RES_TID_MSK) >> IWL50_TX_RES_TID_POS;
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sta_id = (tx_resp->ra_tid & IWL50_TX_RES_RA_MSK) >> IWL50_TX_RES_RA_POS;
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if (txq->sched_retry) {
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const u32 scd_ssn = iwlagn_get_scd_ssn(tx_resp);
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struct iwl_ht_agg *agg = NULL;
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agg = &priv->stations[sta_id].tid[tid].agg;
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iwlagn_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
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/* check if BAR is needed */
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if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
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info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
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if (txq->q.read_ptr != (scd_ssn & 0xff)) {
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index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
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IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim "
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"scd_ssn=%d idx=%d txq=%d swq=%d\n",
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scd_ssn , index, txq_id, txq->swq_id);
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freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
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iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
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if (priv->mac80211_registered &&
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(iwl_queue_space(&txq->q) > txq->q.low_mark) &&
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(agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)) {
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if (agg->state == IWL_AGG_OFF)
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iwl_wake_queue(priv, txq_id);
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else
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iwl_wake_queue(priv, txq->swq_id);
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}
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}
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} else {
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BUG_ON(txq_id != txq->swq_id);
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info->status.rates[0].count = tx_resp->failure_frame + 1;
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info->flags |= iwl_tx_status_to_mac80211(status);
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iwlagn_hwrate_to_tx_control(priv,
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le32_to_cpu(tx_resp->rate_n_flags),
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info);
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IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) rate_n_flags "
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"0x%x retries %d\n",
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txq_id,
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iwl_get_tx_fail_reason(status), status,
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le32_to_cpu(tx_resp->rate_n_flags),
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tx_resp->failure_frame);
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freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
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iwl_free_tfds_in_queue(priv, sta_id, tid, freed);
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if (priv->mac80211_registered &&
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(iwl_queue_space(&txq->q) > txq->q.low_mark))
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iwl_wake_queue(priv, txq_id);
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}
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iwlagn_txq_check_empty(priv, sta_id, tid, txq_id);
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iwl_check_abort_status(priv, tx_resp->frame_count, status);
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}
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void iwlagn_rx_handler_setup(struct iwl_priv *priv)
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{
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/* init calibration handlers */
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priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] =
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iwlagn_rx_calib_result;
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priv->rx_handlers[CALIBRATION_COMPLETE_NOTIFICATION] =
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iwlagn_rx_calib_complete;
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priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
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}
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void iwlagn_setup_deferred_work(struct iwl_priv *priv)
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{
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/* in agn, the tx power calibration is done in uCode */
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priv->disable_tx_power_cal = 1;
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}
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int iwlagn_hw_valid_rtc_data_addr(u32 addr)
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{
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return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
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(addr < IWLAGN_RTC_DATA_UPPER_BOUND);
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}
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int iwlagn_send_tx_power(struct iwl_priv *priv)
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{
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struct iwl5000_tx_power_dbm_cmd tx_power_cmd;
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u8 tx_ant_cfg_cmd;
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/* half dBm need to multiply */
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tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);
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if (priv->tx_power_lmt_in_half_dbm &&
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priv->tx_power_lmt_in_half_dbm < tx_power_cmd.global_lmt) {
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/*
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* For the newer devices which using enhanced/extend tx power
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* table in EEPROM, the format is in half dBm. driver need to
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* convert to dBm format before report to mac80211.
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* By doing so, there is a possibility of 1/2 dBm resolution
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* lost. driver will perform "round-up" operation before
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* reporting, but it will cause 1/2 dBm tx power over the
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* regulatory limit. Perform the checking here, if the
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* "tx_power_user_lmt" is higher than EEPROM value (in
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* half-dBm format), lower the tx power based on EEPROM
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*/
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tx_power_cmd.global_lmt = priv->tx_power_lmt_in_half_dbm;
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}
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tx_power_cmd.flags = IWL50_TX_POWER_NO_CLOSED;
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tx_power_cmd.srv_chan_lmt = IWL50_TX_POWER_AUTO;
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if (IWL_UCODE_API(priv->ucode_ver) == 1)
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tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
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else
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tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;
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return iwl_send_cmd_pdu_async(priv, tx_ant_cfg_cmd,
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sizeof(tx_power_cmd), &tx_power_cmd,
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NULL);
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}
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void iwlagn_temperature(struct iwl_priv *priv)
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{
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/* store temperature from statistics (in Celsius) */
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priv->temperature = le32_to_cpu(priv->statistics.general.temperature);
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iwl_tt_handler(priv);
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}
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u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv)
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{
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struct iwl_eeprom_calib_hdr {
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u8 version;
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u8 pa_type;
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u16 voltage;
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} *hdr;
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hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
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EEPROM_CALIB_ALL);
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return hdr->version;
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}
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/*
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* EEPROM
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*/
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static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address)
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{
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u16 offset = 0;
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if ((address & INDIRECT_ADDRESS) == 0)
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return address;
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switch (address & INDIRECT_TYPE_MSK) {
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case INDIRECT_HOST:
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offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST);
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break;
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case INDIRECT_GENERAL:
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offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL);
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break;
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case INDIRECT_REGULATORY:
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offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY);
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break;
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case INDIRECT_CALIBRATION:
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offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION);
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break;
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case INDIRECT_PROCESS_ADJST:
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offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST);
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break;
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case INDIRECT_OTHERS:
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offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS);
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break;
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default:
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IWL_ERR(priv, "illegal indirect type: 0x%X\n",
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address & INDIRECT_TYPE_MSK);
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break;
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}
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/* translate the offset from words to byte */
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return (address & ADDRESS_MSK) + (offset << 1);
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}
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const u8 *iwlagn_eeprom_query_addr(const struct iwl_priv *priv,
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size_t offset)
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{
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u32 address = eeprom_indirect_address(priv, offset);
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BUG_ON(address >= priv->cfg->eeprom_size);
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return &priv->eeprom[address];
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}
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struct iwl_mod_params iwlagn_mod_params = {
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.amsdu_size_8K = 1,
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.restart_fw = 1,
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/* the rest are 0 by default */
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};
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void iwlagn_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
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{
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unsigned long flags;
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int i;
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spin_lock_irqsave(&rxq->lock, flags);
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INIT_LIST_HEAD(&rxq->rx_free);
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INIT_LIST_HEAD(&rxq->rx_used);
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/* Fill the rx_used queue with _all_ of the Rx buffers */
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for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
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/* In the reset function, these buffers may have been allocated
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* to an SKB, so we need to unmap and free potential storage */
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if (rxq->pool[i].page != NULL) {
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pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
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PAGE_SIZE << priv->hw_params.rx_page_order,
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PCI_DMA_FROMDEVICE);
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__iwl_free_pages(priv, rxq->pool[i].page);
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rxq->pool[i].page = NULL;
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}
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list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
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}
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for (i = 0; i < RX_QUEUE_SIZE; i++)
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rxq->queue[i] = NULL;
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/* Set us so that we have processed and used all buffers, but have
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* not restocked the Rx queue with fresh buffers */
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rxq->read = rxq->write = 0;
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rxq->write_actual = 0;
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rxq->free_count = 0;
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spin_unlock_irqrestore(&rxq->lock, flags);
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}
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int iwlagn_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
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{
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u32 rb_size;
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const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
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u32 rb_timeout = 0; /* FIXME: RX_RB_TIMEOUT for all devices? */
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if (!priv->cfg->use_isr_legacy)
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rb_timeout = RX_RB_TIMEOUT;
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if (priv->cfg->mod_params->amsdu_size_8K)
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rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
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else
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rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
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/* Stop Rx DMA */
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iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
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|
|
|
/* Reset driver's Rx queue write index */
|
|
iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
|
|
|
|
/* Tell device where to find RBD circular buffer in DRAM */
|
|
iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
|
|
(u32)(rxq->dma_addr >> 8));
|
|
|
|
/* Tell device where in DRAM to update its Rx status */
|
|
iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
|
|
rxq->rb_stts_dma >> 4);
|
|
|
|
/* Enable Rx DMA
|
|
* FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in
|
|
* the credit mechanism in 5000 HW RX FIFO
|
|
* Direct rx interrupts to hosts
|
|
* Rx buffer size 4 or 8k
|
|
* RB timeout 0x10
|
|
* 256 RBDs
|
|
*/
|
|
iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
|
|
FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
|
|
FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY |
|
|
FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
|
|
FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
|
|
rb_size|
|
|
(rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)|
|
|
(rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
|
|
|
|
/* Set interrupt coalescing timer to default (2048 usecs) */
|
|
iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int iwlagn_hw_nic_init(struct iwl_priv *priv)
|
|
{
|
|
unsigned long flags;
|
|
struct iwl_rx_queue *rxq = &priv->rxq;
|
|
int ret;
|
|
|
|
/* nic_init */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->cfg->ops->lib->apm_ops.init(priv);
|
|
|
|
/* Set interrupt coalescing calibration timer to default (512 usecs) */
|
|
iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_CALIB_TIMEOUT_DEF);
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
|
|
|
|
priv->cfg->ops->lib->apm_ops.config(priv);
|
|
|
|
/* Allocate the RX queue, or reset if it is already allocated */
|
|
if (!rxq->bd) {
|
|
ret = iwl_rx_queue_alloc(priv);
|
|
if (ret) {
|
|
IWL_ERR(priv, "Unable to initialize Rx queue\n");
|
|
return -ENOMEM;
|
|
}
|
|
} else
|
|
iwlagn_rx_queue_reset(priv, rxq);
|
|
|
|
iwlagn_rx_replenish(priv);
|
|
|
|
iwlagn_rx_init(priv, rxq);
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
rxq->need_update = 1;
|
|
iwl_rx_queue_update_write_ptr(priv, rxq);
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
/* Allocate or reset and init all Tx and Command queues */
|
|
if (!priv->txq) {
|
|
ret = iwlagn_txq_ctx_alloc(priv);
|
|
if (ret)
|
|
return ret;
|
|
} else
|
|
iwlagn_txq_ctx_reset(priv);
|
|
|
|
set_bit(STATUS_INIT, &priv->status);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* iwlagn_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
|
|
*/
|
|
static inline __le32 iwlagn_dma_addr2rbd_ptr(struct iwl_priv *priv,
|
|
dma_addr_t dma_addr)
|
|
{
|
|
return cpu_to_le32((u32)(dma_addr >> 8));
|
|
}
|
|
|
|
/**
|
|
* iwlagn_rx_queue_restock - refill RX queue from pre-allocated pool
|
|
*
|
|
* If there are slots in the RX queue that need to be restocked,
|
|
* and we have free pre-allocated buffers, fill the ranks as much
|
|
* as we can, pulling from rx_free.
|
|
*
|
|
* This moves the 'write' index forward to catch up with 'processed', and
|
|
* also updates the memory address in the firmware to reference the new
|
|
* target buffer.
|
|
*/
|
|
void iwlagn_rx_queue_restock(struct iwl_priv *priv)
|
|
{
|
|
struct iwl_rx_queue *rxq = &priv->rxq;
|
|
struct list_head *element;
|
|
struct iwl_rx_mem_buffer *rxb;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&rxq->lock, flags);
|
|
while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
|
|
/* The overwritten rxb must be a used one */
|
|
rxb = rxq->queue[rxq->write];
|
|
BUG_ON(rxb && rxb->page);
|
|
|
|
/* Get next free Rx buffer, remove from free list */
|
|
element = rxq->rx_free.next;
|
|
rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
|
|
list_del(element);
|
|
|
|
/* Point to Rx buffer via next RBD in circular buffer */
|
|
rxq->bd[rxq->write] = iwlagn_dma_addr2rbd_ptr(priv,
|
|
rxb->page_dma);
|
|
rxq->queue[rxq->write] = rxb;
|
|
rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
|
|
rxq->free_count--;
|
|
}
|
|
spin_unlock_irqrestore(&rxq->lock, flags);
|
|
/* If the pre-allocated buffer pool is dropping low, schedule to
|
|
* refill it */
|
|
if (rxq->free_count <= RX_LOW_WATERMARK)
|
|
queue_work(priv->workqueue, &priv->rx_replenish);
|
|
|
|
|
|
/* If we've added more space for the firmware to place data, tell it.
|
|
* Increment device's write pointer in multiples of 8. */
|
|
if (rxq->write_actual != (rxq->write & ~0x7)) {
|
|
spin_lock_irqsave(&rxq->lock, flags);
|
|
rxq->need_update = 1;
|
|
spin_unlock_irqrestore(&rxq->lock, flags);
|
|
iwl_rx_queue_update_write_ptr(priv, rxq);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* iwlagn_rx_replenish - Move all used packet from rx_used to rx_free
|
|
*
|
|
* When moving to rx_free an SKB is allocated for the slot.
|
|
*
|
|
* Also restock the Rx queue via iwl_rx_queue_restock.
|
|
* This is called as a scheduled work item (except for during initialization)
|
|
*/
|
|
void iwlagn_rx_allocate(struct iwl_priv *priv, gfp_t priority)
|
|
{
|
|
struct iwl_rx_queue *rxq = &priv->rxq;
|
|
struct list_head *element;
|
|
struct iwl_rx_mem_buffer *rxb;
|
|
struct page *page;
|
|
unsigned long flags;
|
|
gfp_t gfp_mask = priority;
|
|
|
|
while (1) {
|
|
spin_lock_irqsave(&rxq->lock, flags);
|
|
if (list_empty(&rxq->rx_used)) {
|
|
spin_unlock_irqrestore(&rxq->lock, flags);
|
|
return;
|
|
}
|
|
spin_unlock_irqrestore(&rxq->lock, flags);
|
|
|
|
if (rxq->free_count > RX_LOW_WATERMARK)
|
|
gfp_mask |= __GFP_NOWARN;
|
|
|
|
if (priv->hw_params.rx_page_order > 0)
|
|
gfp_mask |= __GFP_COMP;
|
|
|
|
/* Alloc a new receive buffer */
|
|
page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order);
|
|
if (!page) {
|
|
if (net_ratelimit())
|
|
IWL_DEBUG_INFO(priv, "alloc_pages failed, "
|
|
"order: %d\n",
|
|
priv->hw_params.rx_page_order);
|
|
|
|
if ((rxq->free_count <= RX_LOW_WATERMARK) &&
|
|
net_ratelimit())
|
|
IWL_CRIT(priv, "Failed to alloc_pages with %s. Only %u free buffers remaining.\n",
|
|
priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
|
|
rxq->free_count);
|
|
/* We don't reschedule replenish work here -- we will
|
|
* call the restock method and if it still needs
|
|
* more buffers it will schedule replenish */
|
|
return;
|
|
}
|
|
|
|
spin_lock_irqsave(&rxq->lock, flags);
|
|
|
|
if (list_empty(&rxq->rx_used)) {
|
|
spin_unlock_irqrestore(&rxq->lock, flags);
|
|
__free_pages(page, priv->hw_params.rx_page_order);
|
|
return;
|
|
}
|
|
element = rxq->rx_used.next;
|
|
rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
|
|
list_del(element);
|
|
|
|
spin_unlock_irqrestore(&rxq->lock, flags);
|
|
|
|
BUG_ON(rxb->page);
|
|
rxb->page = page;
|
|
/* Get physical address of the RB */
|
|
rxb->page_dma = pci_map_page(priv->pci_dev, page, 0,
|
|
PAGE_SIZE << priv->hw_params.rx_page_order,
|
|
PCI_DMA_FROMDEVICE);
|
|
/* dma address must be no more than 36 bits */
|
|
BUG_ON(rxb->page_dma & ~DMA_BIT_MASK(36));
|
|
/* and also 256 byte aligned! */
|
|
BUG_ON(rxb->page_dma & DMA_BIT_MASK(8));
|
|
|
|
spin_lock_irqsave(&rxq->lock, flags);
|
|
|
|
list_add_tail(&rxb->list, &rxq->rx_free);
|
|
rxq->free_count++;
|
|
priv->alloc_rxb_page++;
|
|
|
|
spin_unlock_irqrestore(&rxq->lock, flags);
|
|
}
|
|
}
|
|
|
|
void iwlagn_rx_replenish(struct iwl_priv *priv)
|
|
{
|
|
unsigned long flags;
|
|
|
|
iwlagn_rx_allocate(priv, GFP_KERNEL);
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
iwlagn_rx_queue_restock(priv);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
void iwlagn_rx_replenish_now(struct iwl_priv *priv)
|
|
{
|
|
iwlagn_rx_allocate(priv, GFP_ATOMIC);
|
|
|
|
iwlagn_rx_queue_restock(priv);
|
|
}
|
|
|
|
/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
|
|
* If an SKB has been detached, the POOL needs to have its SKB set to NULL
|
|
* This free routine walks the list of POOL entries and if SKB is set to
|
|
* non NULL it is unmapped and freed
|
|
*/
|
|
void iwlagn_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
|
|
{
|
|
int i;
|
|
for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
|
|
if (rxq->pool[i].page != NULL) {
|
|
pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma,
|
|
PAGE_SIZE << priv->hw_params.rx_page_order,
|
|
PCI_DMA_FROMDEVICE);
|
|
__iwl_free_pages(priv, rxq->pool[i].page);
|
|
rxq->pool[i].page = NULL;
|
|
}
|
|
}
|
|
|
|
dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
|
|
rxq->dma_addr);
|
|
dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status),
|
|
rxq->rb_stts, rxq->rb_stts_dma);
|
|
rxq->bd = NULL;
|
|
rxq->rb_stts = NULL;
|
|
}
|
|
|
|
int iwlagn_rxq_stop(struct iwl_priv *priv)
|
|
{
|
|
|
|
/* stop Rx DMA */
|
|
iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
|
|
iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
|
|
FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
|
|
{
|
|
int idx = 0;
|
|
int band_offset = 0;
|
|
|
|
/* HT rate format: mac80211 wants an MCS number, which is just LSB */
|
|
if (rate_n_flags & RATE_MCS_HT_MSK) {
|
|
idx = (rate_n_flags & 0xff);
|
|
return idx;
|
|
/* Legacy rate format, search for match in table */
|
|
} else {
|
|
if (band == IEEE80211_BAND_5GHZ)
|
|
band_offset = IWL_FIRST_OFDM_RATE;
|
|
for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
|
|
if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
|
|
return idx - band_offset;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* Calc max signal level (dBm) among 3 possible receivers */
|
|
static inline int iwlagn_calc_rssi(struct iwl_priv *priv,
|
|
struct iwl_rx_phy_res *rx_resp)
|
|
{
|
|
return priv->cfg->ops->utils->calc_rssi(priv, rx_resp);
|
|
}
|
|
|
|
#ifdef CONFIG_IWLWIFI_DEBUG
|
|
/**
|
|
* iwlagn_dbg_report_frame - dump frame to syslog during debug sessions
|
|
*
|
|
* You may hack this function to show different aspects of received frames,
|
|
* including selective frame dumps.
|
|
* group100 parameter selects whether to show 1 out of 100 good data frames.
|
|
* All beacon and probe response frames are printed.
|
|
*/
|
|
static void iwlagn_dbg_report_frame(struct iwl_priv *priv,
|
|
struct iwl_rx_phy_res *phy_res, u16 length,
|
|
struct ieee80211_hdr *header, int group100)
|
|
{
|
|
u32 to_us;
|
|
u32 print_summary = 0;
|
|
u32 print_dump = 0; /* set to 1 to dump all frames' contents */
|
|
u32 hundred = 0;
|
|
u32 dataframe = 0;
|
|
__le16 fc;
|
|
u16 seq_ctl;
|
|
u16 channel;
|
|
u16 phy_flags;
|
|
u32 rate_n_flags;
|
|
u32 tsf_low;
|
|
int rssi;
|
|
|
|
if (likely(!(iwl_get_debug_level(priv) & IWL_DL_RX)))
|
|
return;
|
|
|
|
/* MAC header */
|
|
fc = header->frame_control;
|
|
seq_ctl = le16_to_cpu(header->seq_ctrl);
|
|
|
|
/* metadata */
|
|
channel = le16_to_cpu(phy_res->channel);
|
|
phy_flags = le16_to_cpu(phy_res->phy_flags);
|
|
rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
|
|
|
|
/* signal statistics */
|
|
rssi = iwlagn_calc_rssi(priv, phy_res);
|
|
tsf_low = le64_to_cpu(phy_res->timestamp) & 0x0ffffffff;
|
|
|
|
to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
|
|
|
|
/* if data frame is to us and all is good,
|
|
* (optionally) print summary for only 1 out of every 100 */
|
|
if (to_us && (fc & ~cpu_to_le16(IEEE80211_FCTL_PROTECTED)) ==
|
|
cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
|
|
dataframe = 1;
|
|
if (!group100)
|
|
print_summary = 1; /* print each frame */
|
|
else if (priv->framecnt_to_us < 100) {
|
|
priv->framecnt_to_us++;
|
|
print_summary = 0;
|
|
} else {
|
|
priv->framecnt_to_us = 0;
|
|
print_summary = 1;
|
|
hundred = 1;
|
|
}
|
|
} else {
|
|
/* print summary for all other frames */
|
|
print_summary = 1;
|
|
}
|
|
|
|
if (print_summary) {
|
|
char *title;
|
|
int rate_idx;
|
|
u32 bitrate;
|
|
|
|
if (hundred)
|
|
title = "100Frames";
|
|
else if (ieee80211_has_retry(fc))
|
|
title = "Retry";
|
|
else if (ieee80211_is_assoc_resp(fc))
|
|
title = "AscRsp";
|
|
else if (ieee80211_is_reassoc_resp(fc))
|
|
title = "RasRsp";
|
|
else if (ieee80211_is_probe_resp(fc)) {
|
|
title = "PrbRsp";
|
|
print_dump = 1; /* dump frame contents */
|
|
} else if (ieee80211_is_beacon(fc)) {
|
|
title = "Beacon";
|
|
print_dump = 1; /* dump frame contents */
|
|
} else if (ieee80211_is_atim(fc))
|
|
title = "ATIM";
|
|
else if (ieee80211_is_auth(fc))
|
|
title = "Auth";
|
|
else if (ieee80211_is_deauth(fc))
|
|
title = "DeAuth";
|
|
else if (ieee80211_is_disassoc(fc))
|
|
title = "DisAssoc";
|
|
else
|
|
title = "Frame";
|
|
|
|
rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags);
|
|
if (unlikely((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT))) {
|
|
bitrate = 0;
|
|
WARN_ON_ONCE(1);
|
|
} else {
|
|
bitrate = iwl_rates[rate_idx].ieee / 2;
|
|
}
|
|
|
|
/* print frame summary.
|
|
* MAC addresses show just the last byte (for brevity),
|
|
* but you can hack it to show more, if you'd like to. */
|
|
if (dataframe)
|
|
IWL_DEBUG_RX(priv, "%s: mhd=0x%04x, dst=0x%02x, "
|
|
"len=%u, rssi=%d, chnl=%d, rate=%u,\n",
|
|
title, le16_to_cpu(fc), header->addr1[5],
|
|
length, rssi, channel, bitrate);
|
|
else {
|
|
/* src/dst addresses assume managed mode */
|
|
IWL_DEBUG_RX(priv, "%s: 0x%04x, dst=0x%02x, src=0x%02x, "
|
|
"len=%u, rssi=%d, tim=%lu usec, "
|
|
"phy=0x%02x, chnl=%d\n",
|
|
title, le16_to_cpu(fc), header->addr1[5],
|
|
header->addr3[5], length, rssi,
|
|
tsf_low - priv->scan_start_tsf,
|
|
phy_flags, channel);
|
|
}
|
|
}
|
|
if (print_dump)
|
|
iwl_print_hex_dump(priv, IWL_DL_RX, header, length);
|
|
}
|
|
#endif
|
|
|
|
static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
|
|
{
|
|
u32 decrypt_out = 0;
|
|
|
|
if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
|
|
RX_RES_STATUS_STATION_FOUND)
|
|
decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
|
|
RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
|
|
|
|
decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
|
|
|
|
/* packet was not encrypted */
|
|
if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
|
|
RX_RES_STATUS_SEC_TYPE_NONE)
|
|
return decrypt_out;
|
|
|
|
/* packet was encrypted with unknown alg */
|
|
if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
|
|
RX_RES_STATUS_SEC_TYPE_ERR)
|
|
return decrypt_out;
|
|
|
|
/* decryption was not done in HW */
|
|
if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
|
|
RX_MPDU_RES_STATUS_DEC_DONE_MSK)
|
|
return decrypt_out;
|
|
|
|
switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
|
|
|
|
case RX_RES_STATUS_SEC_TYPE_CCMP:
|
|
/* alg is CCM: check MIC only */
|
|
if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
|
|
/* Bad MIC */
|
|
decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
|
|
else
|
|
decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
|
|
|
|
break;
|
|
|
|
case RX_RES_STATUS_SEC_TYPE_TKIP:
|
|
if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
|
|
/* Bad TTAK */
|
|
decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
|
|
break;
|
|
}
|
|
/* fall through if TTAK OK */
|
|
default:
|
|
if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
|
|
decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
|
|
else
|
|
decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
|
|
break;
|
|
}
|
|
|
|
IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n",
|
|
decrypt_in, decrypt_out);
|
|
|
|
return decrypt_out;
|
|
}
|
|
|
|
static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
|
|
struct ieee80211_hdr *hdr,
|
|
u16 len,
|
|
u32 ampdu_status,
|
|
struct iwl_rx_mem_buffer *rxb,
|
|
struct ieee80211_rx_status *stats)
|
|
{
|
|
struct sk_buff *skb;
|
|
__le16 fc = hdr->frame_control;
|
|
|
|
/* We only process data packets if the interface is open */
|
|
if (unlikely(!priv->is_open)) {
|
|
IWL_DEBUG_DROP_LIMIT(priv,
|
|
"Dropping packet while interface is not open.\n");
|
|
return;
|
|
}
|
|
|
|
/* In case of HW accelerated crypto and bad decryption, drop */
|
|
if (!priv->cfg->mod_params->sw_crypto &&
|
|
iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats))
|
|
return;
|
|
|
|
skb = dev_alloc_skb(128);
|
|
if (!skb) {
|
|
IWL_ERR(priv, "dev_alloc_skb failed\n");
|
|
return;
|
|
}
|
|
|
|
skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len);
|
|
|
|
iwl_update_stats(priv, false, fc, len);
|
|
memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
|
|
|
|
ieee80211_rx(priv->hw, skb);
|
|
priv->alloc_rxb_page--;
|
|
rxb->page = NULL;
|
|
}
|
|
|
|
/* Called for REPLY_RX (legacy ABG frames), or
|
|
* REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
|
|
void iwlagn_rx_reply_rx(struct iwl_priv *priv,
|
|
struct iwl_rx_mem_buffer *rxb)
|
|
{
|
|
struct ieee80211_hdr *header;
|
|
struct ieee80211_rx_status rx_status;
|
|
struct iwl_rx_packet *pkt = rxb_addr(rxb);
|
|
struct iwl_rx_phy_res *phy_res;
|
|
__le32 rx_pkt_status;
|
|
struct iwl4965_rx_mpdu_res_start *amsdu;
|
|
u32 len;
|
|
u32 ampdu_status;
|
|
u32 rate_n_flags;
|
|
|
|
/**
|
|
* REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
|
|
* REPLY_RX: physical layer info is in this buffer
|
|
* REPLY_RX_MPDU_CMD: physical layer info was sent in separate
|
|
* command and cached in priv->last_phy_res
|
|
*
|
|
* Here we set up local variables depending on which command is
|
|
* received.
|
|
*/
|
|
if (pkt->hdr.cmd == REPLY_RX) {
|
|
phy_res = (struct iwl_rx_phy_res *)pkt->u.raw;
|
|
header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res)
|
|
+ phy_res->cfg_phy_cnt);
|
|
|
|
len = le16_to_cpu(phy_res->byte_count);
|
|
rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) +
|
|
phy_res->cfg_phy_cnt + len);
|
|
ampdu_status = le32_to_cpu(rx_pkt_status);
|
|
} else {
|
|
if (!priv->_agn.last_phy_res_valid) {
|
|
IWL_ERR(priv, "MPDU frame without cached PHY data\n");
|
|
return;
|
|
}
|
|
phy_res = &priv->_agn.last_phy_res;
|
|
amsdu = (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
|
|
header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
|
|
len = le16_to_cpu(amsdu->byte_count);
|
|
rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len);
|
|
ampdu_status = iwlagn_translate_rx_status(priv,
|
|
le32_to_cpu(rx_pkt_status));
|
|
}
|
|
|
|
if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
|
|
IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
|
|
phy_res->cfg_phy_cnt);
|
|
return;
|
|
}
|
|
|
|
if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
|
|
!(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
|
|
IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
|
|
le32_to_cpu(rx_pkt_status));
|
|
return;
|
|
}
|
|
|
|
/* This will be used in several places later */
|
|
rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
|
|
|
|
/* rx_status carries information about the packet to mac80211 */
|
|
rx_status.mactime = le64_to_cpu(phy_res->timestamp);
|
|
rx_status.freq =
|
|
ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel));
|
|
rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
|
|
IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
|
|
rx_status.rate_idx =
|
|
iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
|
|
rx_status.flag = 0;
|
|
|
|
/* TSF isn't reliable. In order to allow smooth user experience,
|
|
* this W/A doesn't propagate it to the mac80211 */
|
|
/*rx_status.flag |= RX_FLAG_TSFT;*/
|
|
|
|
priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
|
|
|
|
/* Find max signal strength (dBm) among 3 antenna/receiver chains */
|
|
rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
|
|
|
|
#ifdef CONFIG_IWLWIFI_DEBUG
|
|
/* Set "1" to report good data frames in groups of 100 */
|
|
if (unlikely(iwl_get_debug_level(priv) & IWL_DL_RX))
|
|
iwlagn_dbg_report_frame(priv, phy_res, len, header, 1);
|
|
#endif
|
|
iwl_dbg_log_rx_data_frame(priv, len, header);
|
|
IWL_DEBUG_STATS_LIMIT(priv, "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_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
|
|
>> RX_RES_PHY_FLAGS_ANTENNA_POS;
|
|
|
|
/* set the preamble flag if appropriate */
|
|
if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
|
|
rx_status.flag |= RX_FLAG_SHORTPRE;
|
|
|
|
/* Set up the HT phy flags */
|
|
if (rate_n_flags & RATE_MCS_HT_MSK)
|
|
rx_status.flag |= RX_FLAG_HT;
|
|
if (rate_n_flags & RATE_MCS_HT40_MSK)
|
|
rx_status.flag |= RX_FLAG_40MHZ;
|
|
if (rate_n_flags & RATE_MCS_SGI_MSK)
|
|
rx_status.flag |= RX_FLAG_SHORT_GI;
|
|
|
|
iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
|
|
rxb, &rx_status);
|
|
}
|
|
|
|
/* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
|
|
* This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
|
|
void iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
|
|
struct iwl_rx_mem_buffer *rxb)
|
|
{
|
|
struct iwl_rx_packet *pkt = rxb_addr(rxb);
|
|
priv->_agn.last_phy_res_valid = true;
|
|
memcpy(&priv->_agn.last_phy_res, pkt->u.raw,
|
|
sizeof(struct iwl_rx_phy_res));
|
|
}
|
|
|
|
static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
|
|
struct ieee80211_vif *vif,
|
|
enum ieee80211_band band,
|
|
struct iwl_scan_channel *scan_ch)
|
|
{
|
|
const struct ieee80211_supported_band *sband;
|
|
u16 passive_dwell = 0;
|
|
u16 active_dwell = 0;
|
|
int added = 0;
|
|
u16 channel = 0;
|
|
|
|
sband = iwl_get_hw_mode(priv, band);
|
|
if (!sband) {
|
|
IWL_ERR(priv, "invalid band\n");
|
|
return added;
|
|
}
|
|
|
|
active_dwell = iwl_get_active_dwell_time(priv, band, 0);
|
|
passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
|
|
|
|
if (passive_dwell <= active_dwell)
|
|
passive_dwell = active_dwell + 1;
|
|
|
|
channel = iwl_get_single_channel_number(priv, band);
|
|
if (channel) {
|
|
scan_ch->channel = cpu_to_le16(channel);
|
|
scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
|
|
scan_ch->active_dwell = cpu_to_le16(active_dwell);
|
|
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
|
|
/* Set txpower levels to defaults */
|
|
scan_ch->dsp_atten = 110;
|
|
if (band == IEEE80211_BAND_5GHZ)
|
|
scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
|
|
else
|
|
scan_ch->tx_gain = ((1 << 5) | (5 << 3));
|
|
added++;
|
|
} else
|
|
IWL_ERR(priv, "no valid channel found\n");
|
|
return added;
|
|
}
|
|
|
|
static int iwl_get_channels_for_scan(struct iwl_priv *priv,
|
|
struct ieee80211_vif *vif,
|
|
enum ieee80211_band band,
|
|
u8 is_active, u8 n_probes,
|
|
struct iwl_scan_channel *scan_ch)
|
|
{
|
|
struct ieee80211_channel *chan;
|
|
const struct ieee80211_supported_band *sband;
|
|
const struct iwl_channel_info *ch_info;
|
|
u16 passive_dwell = 0;
|
|
u16 active_dwell = 0;
|
|
int added, i;
|
|
u16 channel;
|
|
|
|
sband = iwl_get_hw_mode(priv, band);
|
|
if (!sband)
|
|
return 0;
|
|
|
|
active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
|
|
passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
|
|
|
|
if (passive_dwell <= active_dwell)
|
|
passive_dwell = active_dwell + 1;
|
|
|
|
for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
|
|
chan = priv->scan_request->channels[i];
|
|
|
|
if (chan->band != band)
|
|
continue;
|
|
|
|
channel = ieee80211_frequency_to_channel(chan->center_freq);
|
|
scan_ch->channel = cpu_to_le16(channel);
|
|
|
|
ch_info = iwl_get_channel_info(priv, band, channel);
|
|
if (!is_channel_valid(ch_info)) {
|
|
IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
|
|
channel);
|
|
continue;
|
|
}
|
|
|
|
if (!is_active || is_channel_passive(ch_info) ||
|
|
(chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
|
|
scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
|
|
else
|
|
scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
|
|
|
|
if (n_probes)
|
|
scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
|
|
|
|
scan_ch->active_dwell = cpu_to_le16(active_dwell);
|
|
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
|
|
|
|
/* Set txpower levels to defaults */
|
|
scan_ch->dsp_atten = 110;
|
|
|
|
/* NOTE: if we were doing 6Mb OFDM for scans we'd use
|
|
* power level:
|
|
* scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
|
|
*/
|
|
if (band == IEEE80211_BAND_5GHZ)
|
|
scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
|
|
else
|
|
scan_ch->tx_gain = ((1 << 5) | (5 << 3));
|
|
|
|
IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
|
|
channel, le32_to_cpu(scan_ch->type),
|
|
(scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
|
|
"ACTIVE" : "PASSIVE",
|
|
(scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
|
|
active_dwell : passive_dwell);
|
|
|
|
scan_ch++;
|
|
added++;
|
|
}
|
|
|
|
IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
|
|
return added;
|
|
}
|
|
|
|
void iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
|
|
{
|
|
struct iwl_host_cmd cmd = {
|
|
.id = REPLY_SCAN_CMD,
|
|
.len = sizeof(struct iwl_scan_cmd),
|
|
.flags = CMD_SIZE_HUGE,
|
|
};
|
|
struct iwl_scan_cmd *scan;
|
|
struct ieee80211_conf *conf = NULL;
|
|
u32 rate_flags = 0;
|
|
u16 cmd_len;
|
|
u16 rx_chain = 0;
|
|
enum ieee80211_band band;
|
|
u8 n_probes = 0;
|
|
u8 rx_ant = priv->hw_params.valid_rx_ant;
|
|
u8 rate;
|
|
bool is_active = false;
|
|
int chan_mod;
|
|
u8 active_chains;
|
|
|
|
conf = ieee80211_get_hw_conf(priv->hw);
|
|
|
|
cancel_delayed_work(&priv->scan_check);
|
|
|
|
if (!iwl_is_ready(priv)) {
|
|
IWL_WARN(priv, "request scan called when driver not ready.\n");
|
|
goto done;
|
|
}
|
|
|
|
/* Make sure the scan wasn't canceled before this queued work
|
|
* was given the chance to run... */
|
|
if (!test_bit(STATUS_SCANNING, &priv->status))
|
|
goto done;
|
|
|
|
/* This should never be called or scheduled if there is currently
|
|
* a scan active in the hardware. */
|
|
if (test_bit(STATUS_SCAN_HW, &priv->status)) {
|
|
IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests in parallel. "
|
|
"Ignoring second request.\n");
|
|
goto done;
|
|
}
|
|
|
|
if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
|
|
IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
|
|
goto done;
|
|
}
|
|
|
|
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
|
|
IWL_DEBUG_HC(priv, "Scan request while abort pending. Queuing.\n");
|
|
goto done;
|
|
}
|
|
|
|
if (iwl_is_rfkill(priv)) {
|
|
IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
|
|
goto done;
|
|
}
|
|
|
|
if (!test_bit(STATUS_READY, &priv->status)) {
|
|
IWL_DEBUG_HC(priv, "Scan request while uninitialized. Queuing.\n");
|
|
goto done;
|
|
}
|
|
|
|
if (!priv->scan_cmd) {
|
|
priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
|
|
IWL_MAX_SCAN_SIZE, GFP_KERNEL);
|
|
if (!priv->scan_cmd) {
|
|
IWL_DEBUG_SCAN(priv,
|
|
"fail to allocate memory for scan\n");
|
|
goto done;
|
|
}
|
|
}
|
|
scan = priv->scan_cmd;
|
|
memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
|
|
|
|
scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
|
|
scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
|
|
|
|
if (iwl_is_associated(priv)) {
|
|
u16 interval = 0;
|
|
u32 extra;
|
|
u32 suspend_time = 100;
|
|
u32 scan_suspend_time = 100;
|
|
unsigned long flags;
|
|
|
|
IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
interval = vif ? vif->bss_conf.beacon_int : 0;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
scan->suspend_time = 0;
|
|
scan->max_out_time = cpu_to_le32(200 * 1024);
|
|
if (!interval)
|
|
interval = suspend_time;
|
|
|
|
extra = (suspend_time / interval) << 22;
|
|
scan_suspend_time = (extra |
|
|
((suspend_time % interval) * 1024));
|
|
scan->suspend_time = cpu_to_le32(scan_suspend_time);
|
|
IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
|
|
scan_suspend_time, interval);
|
|
}
|
|
|
|
if (priv->is_internal_short_scan) {
|
|
IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
|
|
} else if (priv->scan_request->n_ssids) {
|
|
int i, p = 0;
|
|
IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
|
|
for (i = 0; i < priv->scan_request->n_ssids; i++) {
|
|
/* always does wildcard anyway */
|
|
if (!priv->scan_request->ssids[i].ssid_len)
|
|
continue;
|
|
scan->direct_scan[p].id = WLAN_EID_SSID;
|
|
scan->direct_scan[p].len =
|
|
priv->scan_request->ssids[i].ssid_len;
|
|
memcpy(scan->direct_scan[p].ssid,
|
|
priv->scan_request->ssids[i].ssid,
|
|
priv->scan_request->ssids[i].ssid_len);
|
|
n_probes++;
|
|
p++;
|
|
}
|
|
is_active = true;
|
|
} else
|
|
IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
|
|
|
|
scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
|
|
scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
|
|
scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
|
|
|
|
switch (priv->scan_band) {
|
|
case IEEE80211_BAND_2GHZ:
|
|
scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
|
|
chan_mod = le32_to_cpu(priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_MSK)
|
|
>> RXON_FLG_CHANNEL_MODE_POS;
|
|
if (chan_mod == CHANNEL_MODE_PURE_40) {
|
|
rate = IWL_RATE_6M_PLCP;
|
|
} else {
|
|
rate = IWL_RATE_1M_PLCP;
|
|
rate_flags = RATE_MCS_CCK_MSK;
|
|
}
|
|
scan->good_CRC_th = IWL_GOOD_CRC_TH_DISABLED;
|
|
break;
|
|
case IEEE80211_BAND_5GHZ:
|
|
rate = IWL_RATE_6M_PLCP;
|
|
/*
|
|
* If active scanning is requested but a certain channel is
|
|
* marked passive, we can do active scanning if we detect
|
|
* transmissions.
|
|
*
|
|
* There is an issue with some firmware versions that triggers
|
|
* a sysassert on a "good CRC threshold" of zero (== disabled),
|
|
* on a radar channel even though this means that we should NOT
|
|
* send probes.
|
|
*
|
|
* The "good CRC threshold" is the number of frames that we
|
|
* need to receive during our dwell time on a channel before
|
|
* sending out probes -- setting this to a huge value will
|
|
* mean we never reach it, but at the same time work around
|
|
* the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
|
|
* here instead of IWL_GOOD_CRC_TH_DISABLED.
|
|
*/
|
|
scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
|
|
IWL_GOOD_CRC_TH_NEVER;
|
|
break;
|
|
default:
|
|
IWL_WARN(priv, "Invalid scan band count\n");
|
|
goto done;
|
|
}
|
|
|
|
band = priv->scan_band;
|
|
|
|
if (priv->cfg->scan_antennas[band])
|
|
rx_ant = priv->cfg->scan_antennas[band];
|
|
|
|
priv->scan_tx_ant[band] =
|
|
iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band]);
|
|
rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
|
|
scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
|
|
|
|
/* In power save mode use one chain, otherwise use all chains */
|
|
if (test_bit(STATUS_POWER_PMI, &priv->status)) {
|
|
/* rx_ant has been set to all valid chains previously */
|
|
active_chains = rx_ant &
|
|
((u8)(priv->chain_noise_data.active_chains));
|
|
if (!active_chains)
|
|
active_chains = rx_ant;
|
|
|
|
IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
|
|
priv->chain_noise_data.active_chains);
|
|
|
|
rx_ant = first_antenna(active_chains);
|
|
}
|
|
/* MIMO is not used here, but value is required */
|
|
rx_chain |= priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
|
|
rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
|
|
rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
|
|
rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
|
|
scan->rx_chain = cpu_to_le16(rx_chain);
|
|
if (!priv->is_internal_short_scan) {
|
|
cmd_len = iwl_fill_probe_req(priv,
|
|
(struct ieee80211_mgmt *)scan->data,
|
|
priv->scan_request->ie,
|
|
priv->scan_request->ie_len,
|
|
IWL_MAX_SCAN_SIZE - sizeof(*scan));
|
|
} else {
|
|
cmd_len = iwl_fill_probe_req(priv,
|
|
(struct ieee80211_mgmt *)scan->data,
|
|
NULL, 0,
|
|
IWL_MAX_SCAN_SIZE - sizeof(*scan));
|
|
|
|
}
|
|
scan->tx_cmd.len = cpu_to_le16(cmd_len);
|
|
|
|
scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
|
|
RXON_FILTER_BCON_AWARE_MSK);
|
|
|
|
if (priv->is_internal_short_scan) {
|
|
scan->channel_count =
|
|
iwl_get_single_channel_for_scan(priv, vif, band,
|
|
(void *)&scan->data[le16_to_cpu(
|
|
scan->tx_cmd.len)]);
|
|
} else {
|
|
scan->channel_count =
|
|
iwl_get_channels_for_scan(priv, vif, band,
|
|
is_active, n_probes,
|
|
(void *)&scan->data[le16_to_cpu(
|
|
scan->tx_cmd.len)]);
|
|
}
|
|
if (scan->channel_count == 0) {
|
|
IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
|
|
goto done;
|
|
}
|
|
|
|
cmd.len += le16_to_cpu(scan->tx_cmd.len) +
|
|
scan->channel_count * sizeof(struct iwl_scan_channel);
|
|
cmd.data = scan;
|
|
scan->len = cpu_to_le16(cmd.len);
|
|
|
|
set_bit(STATUS_SCAN_HW, &priv->status);
|
|
if (iwl_send_cmd_sync(priv, &cmd))
|
|
goto done;
|
|
|
|
queue_delayed_work(priv->workqueue, &priv->scan_check,
|
|
IWL_SCAN_CHECK_WATCHDOG);
|
|
|
|
return;
|
|
|
|
done:
|
|
/* Cannot perform scan. Make sure we clear scanning
|
|
* bits from status so next scan request can be performed.
|
|
* If we don't clear scanning status bit here all next scan
|
|
* will fail
|
|
*/
|
|
clear_bit(STATUS_SCAN_HW, &priv->status);
|
|
clear_bit(STATUS_SCANNING, &priv->status);
|
|
/* inform mac80211 scan aborted */
|
|
queue_work(priv->workqueue, &priv->scan_completed);
|
|
}
|
|
|
|
int iwlagn_manage_ibss_station(struct iwl_priv *priv,
|
|
struct ieee80211_vif *vif, bool add)
|
|
{
|
|
struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
|
|
|
|
if (add)
|
|
return iwl_add_bssid_station(priv, vif->bss_conf.bssid, true,
|
|
&vif_priv->ibss_bssid_sta_id);
|
|
return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
|
|
vif->bss_conf.bssid);
|
|
}
|