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@@ -0,0 +1,372 @@
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+/******************************************************************************
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+ *
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+ * This file is provided under a dual BSD/GPLv2 license. When using or
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+ * redistributing this file, you may do so under either license.
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+ *
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+ * GPL LICENSE SUMMARY
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+ *
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+ * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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+ * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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+ * Copyright(c) 2015 Intel Deutschland GmbH
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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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+ * The full GNU General Public License is included in this distribution
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+ * in the file called COPYING.
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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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+ * BSD LICENSE
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+ *
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+ * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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+ * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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+ * Copyright(c) 2015 Intel Deutschland GmbH
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+ * All rights reserved.
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+ *
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+ * Redistribution and use in source and binary forms, with or without
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+ * modification, are permitted provided that the following conditions
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+ * are met:
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+ *
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+ * * Redistributions of source code must retain the above copyright
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+ * notice, this list of conditions and the following disclaimer.
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+ * * Redistributions in binary form must reproduce the above copyright
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+ * notice, this list of conditions and the following disclaimer in
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+ * the documentation and/or other materials provided with the
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+ * distribution.
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+ * * Neither the name Intel Corporation nor the names of its
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+ * contributors may be used to endorse or promote products derived
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+ * from this software without specific prior written permission.
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+ *
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+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+ *****************************************************************************/
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+#include <linux/etherdevice.h>
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+#include <linux/skbuff.h>
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+#include "iwl-trans.h"
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+#include "mvm.h"
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+#include "fw-api.h"
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+#include "fw-dbg.h"
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+
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+void iwl_mvm_rx_phy_cmd_mq(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
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+{
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+ mvm->ampdu_ref++;
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+
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+#ifdef CONFIG_IWLWIFI_DEBUGFS
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+ if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
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+ spin_lock(&mvm->drv_stats_lock);
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+ mvm->drv_rx_stats.ampdu_count++;
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+ spin_unlock(&mvm->drv_stats_lock);
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+ }
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+#endif
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+}
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+
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+static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
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+ struct napi_struct *napi,
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+ struct sk_buff *skb,
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+ struct ieee80211_hdr *hdr, u16 len,
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+ u32 ampdu_status, u8 crypt_len,
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+ struct iwl_rx_cmd_buffer *rxb)
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+{
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+ unsigned int hdrlen, fraglen;
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+
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+ /* If frame is small enough to fit in skb->head, pull it completely.
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+ * If not, only pull ieee80211_hdr (including crypto if present, and
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+ * an additional 8 bytes for SNAP/ethertype, see below) so that
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+ * splice() or TCP coalesce are more efficient.
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+ *
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+ * Since, in addition, ieee80211_data_to_8023() always pull in at
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+ * least 8 bytes (possibly more for mesh) we can do the same here
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+ * to save the cost of doing it later. That still doesn't pull in
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+ * the actual IP header since the typical case has a SNAP header.
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+ * If the latter changes (there are efforts in the standards group
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+ * to do so) we should revisit this and ieee80211_data_to_8023().
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+ */
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+ hdrlen = (len <= skb_tailroom(skb)) ? len :
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+ sizeof(*hdr) + crypt_len + 8;
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+
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+ memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
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+ fraglen = len - hdrlen;
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+
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+ if (fraglen) {
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+ int offset = (void *)hdr + hdrlen -
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+ rxb_addr(rxb) + rxb_offset(rxb);
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+
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+ skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
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+ fraglen, rxb->truesize);
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+ }
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+
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+ ieee80211_rx_napi(mvm->hw, skb, napi);
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+}
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+
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+static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
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+ struct iwl_rx_mpdu_desc *desc,
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+ struct ieee80211_rx_status *rx_status)
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+{
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+ int energy_a, energy_b, energy_c, max_energy;
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+
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+ energy_a = desc->energy_a;
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+ energy_a = energy_a ? -energy_a : S8_MIN;
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+ energy_b = desc->energy_b;
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+ energy_b = energy_b ? -energy_b : S8_MIN;
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+ energy_c = desc->energy_c;
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+ energy_c = energy_c ? -energy_c : S8_MIN;
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+ max_energy = max(energy_a, energy_b);
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+ max_energy = max(max_energy, energy_c);
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+
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+ IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
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+ energy_a, energy_b, energy_c, max_energy);
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+
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+ rx_status->signal = max_energy;
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+ rx_status->chains = 0; /* TODO: phy info */
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+ rx_status->chain_signal[0] = energy_a;
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+ rx_status->chain_signal[1] = energy_b;
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+ rx_status->chain_signal[2] = energy_c;
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+}
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+
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+static u32 iwl_mvm_rx_crypto(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
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+ struct ieee80211_rx_status *stats,
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+ struct iwl_rx_mpdu_desc *desc, int queue,
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+ u8 *crypt_len)
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+{
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+ u16 status = le16_to_cpu(desc->status);
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+
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+ if (!ieee80211_has_protected(hdr->frame_control) ||
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+ (status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
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+ IWL_RX_MPDU_STATUS_SEC_NONE)
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+ return 0;
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+
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+ /* TODO: handle packets encrypted with unknown alg */
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+
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+ switch (status & IWL_RX_MPDU_STATUS_SEC_MASK) {
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+ case IWL_RX_MPDU_STATUS_SEC_CCM:
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+ case IWL_RX_MPDU_STATUS_SEC_GCM:
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+ /* alg is CCM: check MIC only */
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+ if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
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+ return -1;
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+
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+ stats->flag |= RX_FLAG_DECRYPTED;
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+ *crypt_len = IEEE80211_CCMP_HDR_LEN;
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+ return 0;
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+ case IWL_RX_MPDU_STATUS_SEC_TKIP:
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+ /* Don't drop the frame and decrypt it in SW */
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+ if (!(status & IWL_RX_MPDU_RES_STATUS_TTAK_OK))
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+ return 0;
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+
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+ *crypt_len = IEEE80211_TKIP_IV_LEN;
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+ /* fall through if TTAK OK */
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+ case IWL_RX_MPDU_STATUS_SEC_WEP:
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+ if (!(status & IWL_RX_MPDU_STATUS_ICV_OK))
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+ return -1;
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+
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+ stats->flag |= RX_FLAG_DECRYPTED;
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+ if ((status & IWL_RX_MPDU_STATUS_SEC_MASK) ==
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+ IWL_RX_MPDU_STATUS_SEC_WEP)
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+ *crypt_len = IEEE80211_WEP_IV_LEN;
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+ return 0;
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+ case IWL_RX_MPDU_STATUS_SEC_EXT_ENC:
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+ if (!(status & IWL_RX_MPDU_STATUS_MIC_OK))
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+ return -1;
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+ stats->flag |= RX_FLAG_DECRYPTED;
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+ return 0;
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+ default:
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+ IWL_ERR(mvm, "Unhandled alg: 0x%x\n", status);
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+ }
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+
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+ return 0;
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+}
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+
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+static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
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+ struct sk_buff *skb,
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+ struct iwl_rx_mpdu_desc *desc)
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+{
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+ struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
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+ struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
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+
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+ if (mvmvif->features & NETIF_F_RXCSUM &&
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+ desc->l3l4_flags & cpu_to_le16(IWL_RX_L3L4_IP_HDR_CSUM_OK) &&
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+ desc->l3l4_flags & cpu_to_le16(IWL_RX_L3L4_TCP_UDP_CSUM_OK))
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+ skb->ip_summed = CHECKSUM_UNNECESSARY;
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+}
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+
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+void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
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+ struct iwl_rx_cmd_buffer *rxb, int queue)
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+{
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+ struct ieee80211_rx_status *rx_status;
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+ struct iwl_rx_packet *pkt = rxb_addr(rxb);
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+ struct iwl_rx_mpdu_desc *desc = (void *)pkt->data;
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+ struct ieee80211_hdr *hdr = (void *)(desc + 1);
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+ u32 len = le16_to_cpu(desc->mpdu_len);
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+ u32 rate_n_flags = le32_to_cpu(desc->rate_n_flags);
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+ struct ieee80211_sta *sta = NULL;
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+ struct sk_buff *skb;
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+ u32 ampdu_status;
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+ u8 crypt_len = 0;
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+
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+ /* Dont use dev_alloc_skb(), we'll have enough headroom once
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+ * ieee80211_hdr pulled.
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+ */
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+ skb = alloc_skb(128, GFP_ATOMIC);
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+ if (!skb) {
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+ IWL_ERR(mvm, "alloc_skb failed\n");
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+ return;
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+ }
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+
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+ rx_status = IEEE80211_SKB_RXCB(skb);
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+
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+ if (iwl_mvm_rx_crypto(mvm, hdr, rx_status, desc, queue, &crypt_len)) {
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+ kfree_skb(skb);
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+ return;
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+ }
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+
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+ /*
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+ * Keep packets with CRC errors (and with overrun) for monitor mode
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+ * (otherwise the firmware discards them) but mark them as bad.
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+ */
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+ if (!(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_CRC_OK)) ||
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+ !(desc->status & cpu_to_le16(IWL_RX_MPDU_STATUS_OVERRUN_OK))) {
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+ IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n",
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+ le16_to_cpu(desc->status));
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+ rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
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+ }
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+
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+ rx_status->mactime = le64_to_cpu(desc->tsf_on_air_rise);
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+ rx_status->device_timestamp = le32_to_cpu(desc->gp2_on_air_rise);
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+ rx_status->band = desc->channel > 14 ? IEEE80211_BAND_5GHZ :
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+ IEEE80211_BAND_2GHZ;
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+ rx_status->freq = ieee80211_channel_to_frequency(desc->channel,
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+ rx_status->band);
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+ iwl_mvm_get_signal_strength(mvm, desc, rx_status);
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+
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+ rcu_read_lock();
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+
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+ if (le16_to_cpu(desc->status) & IWL_RX_MPDU_STATUS_SRC_STA_FOUND) {
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+ u8 id = desc->sta_id_flags & IWL_RX_MPDU_SIF_STA_ID_MASK;
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+
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+ if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) {
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+ sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
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+ if (IS_ERR(sta))
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+ sta = NULL;
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+ }
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+ } else if (!is_multicast_ether_addr(hdr->addr2)) {
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+ /*
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+ * This is fine since we prevent two stations with the same
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+ * address from being added.
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+ */
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+ sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
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+ }
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+
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+ if (sta) {
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+ struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
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+
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+ /*
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+ * We have tx blocked stations (with CS bit). If we heard
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+ * frames from a blocked station on a new channel we can
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+ * TX to it again.
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+ */
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+ if (unlikely(mvm->csa_tx_block_bcn_timeout))
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+ iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);
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+
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+ rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
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+
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+ if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
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+ ieee80211_is_beacon(hdr->frame_control)) {
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+ struct iwl_fw_dbg_trigger_tlv *trig;
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+ struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
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+ bool trig_check;
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+ s32 rssi;
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+
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+ trig = iwl_fw_dbg_get_trigger(mvm->fw,
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+ FW_DBG_TRIGGER_RSSI);
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+ rssi_trig = (void *)trig->data;
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+ rssi = le32_to_cpu(rssi_trig->rssi);
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+
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+ trig_check =
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+ iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
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+ trig);
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+ if (trig_check && rx_status->signal < rssi)
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+ iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
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+ }
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+
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+ /* TODO: multi queue TCM */
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+
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+ if (ieee80211_is_data(hdr->frame_control))
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+ iwl_mvm_rx_csum(sta, skb, desc);
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+ }
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+
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+ rcu_read_unlock();
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+
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+ /*
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+ * TODO: PHY info.
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+ * Verify we don't have the information in the MPDU descriptor and
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+ * that it is not needed.
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+ * Make sure for monitor mode that we are on default queue, update
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+ * ampdu_ref and the rest of phy info then
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+ */
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+
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+ /* Set up the HT phy flags */
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+ switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
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+ case RATE_MCS_CHAN_WIDTH_20:
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+ break;
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+ case RATE_MCS_CHAN_WIDTH_40:
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+ rx_status->flag |= RX_FLAG_40MHZ;
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+ break;
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+ case RATE_MCS_CHAN_WIDTH_80:
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+ rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
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+ break;
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+ case RATE_MCS_CHAN_WIDTH_160:
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+ rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
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+ break;
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+ }
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+ if (rate_n_flags & RATE_MCS_SGI_MSK)
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+ rx_status->flag |= RX_FLAG_SHORT_GI;
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+ if (rate_n_flags & RATE_HT_MCS_GF_MSK)
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+ rx_status->flag |= RX_FLAG_HT_GF;
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+ if (rate_n_flags & RATE_MCS_LDPC_MSK)
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+ rx_status->flag |= RX_FLAG_LDPC;
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+ if (rate_n_flags & RATE_MCS_HT_MSK) {
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+ u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
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+ RATE_MCS_STBC_POS;
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+ rx_status->flag |= RX_FLAG_HT;
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+ rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
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+ rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
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+ } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
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+ u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
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+ RATE_MCS_STBC_POS;
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+ rx_status->vht_nss =
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+ ((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);
|
|
|
+}
|
Johannes Berg