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iwlwifi: mvm: support filtered frames notification 

During d0i3 frames might be filtered by the FW and this may
cause reordering buffer a delay - as the frames will not be
received and reorder will time out.

Introduce an API function to receive notification of filtered
frames and pass the information to the mac80211.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Sara Sharon 2015-07-22 11:38:40 +03:00 committed by Emmanuel Grumbach
parent 77fe739554
commit 3af512d6aa
4 changed files with 77 additions and 0 deletions
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22
drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
View File

@ -119,6 +119,8 @@ enum {
SCAN_ABORT_UMAC = 0xe,
SCAN_COMPLETE_UMAC = 0xf,
BA_WINDOW_STATUS_NOTIFICATION_ID = 0x13,
/* station table */
ADD_STA_KEY = 0x17,
ADD_STA = 0x18,
@ -1286,6 +1288,26 @@ struct iwl_fw_bcast_filter {
struct iwl_fw_bcast_filter_attr attrs[MAX_BCAST_FILTER_ATTRS];
} __packed; /* BCAST_FILTER_S_VER_1 */
#define BA_WINDOW_STREAMS_MAX 16
#define BA_WINDOW_STATUS_TID_MSK 0x000F
#define BA_WINDOW_STATUS_STA_ID_POS 4
#define BA_WINDOW_STATUS_STA_ID_MSK 0x01F0
#define BA_WINDOW_STATUS_VALID_MSK BIT(9)
/**
* struct iwl_ba_window_status_notif - reordering window's status notification
* @bitmap: bitmap of received frames [start_seq_num + 0]..[start_seq_num + 63]
* @ra_tid: bit 3:0 - TID, bit 8:4 - STA_ID, bit 9 - valid
* @start_seq_num: the start sequence number of the bitmap
* @mpdu_rx_count: the number of received MPDUs since entering D0i3
*/
struct iwl_ba_window_status_notif {
__le64 bitmap[BA_WINDOW_STREAMS_MAX];
__le16 ra_tid[BA_WINDOW_STREAMS_MAX];
__le32 start_seq_num[BA_WINDOW_STREAMS_MAX];
__le16 mpdu_rx_count[BA_WINDOW_STREAMS_MAX];
} __packed; /* BA_WINDOW_STATUS_NTFY_API_S_VER_1 */
/**
* struct iwl_fw_bcast_mac - per-mac broadcast filtering configuration.
* @default_discard: default action for this mac (discard (1) / pass (0)).

2
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
View File

@ -1268,6 +1268,8 @@ void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb);
void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb);
void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb);
void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
struct ieee80211_vif *vif);
unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm,

4
drivers/net/wireless/intel/iwlwifi/mvm/ops.c
View File

@ -236,6 +236,9 @@ static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
iwl_mvm_rx_ant_coupling_notif, true),
RX_HANDLER(BA_WINDOW_STATUS_NOTIFICATION_ID,
iwl_mvm_window_status_notif, false),
RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
RX_HANDLER(MCC_CHUB_UPDATE_CMD, iwl_mvm_rx_chub_update_mcc, true),
@ -294,6 +297,7 @@ static const struct iwl_hcmd_names iwl_mvm_legacy_names[] = {
HCMD_NAME(SCAN_COMPLETE_UMAC),
HCMD_NAME(TOF_CMD),
HCMD_NAME(TOF_NOTIFICATION),
HCMD_NAME(BA_WINDOW_STATUS_NOTIFICATION_ID),
HCMD_NAME(ADD_STA_KEY),
HCMD_NAME(ADD_STA),
HCMD_NAME(REMOVE_STA),

49
drivers/net/wireless/intel/iwlwifi/mvm/rx.c
View File

@ -7,6 +7,7 @@
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2016 Intel Deutschland GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
@ -626,3 +627,51 @@ void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
{
iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
}
void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
int i;
u32 pkt_len = iwl_rx_packet_payload_len(pkt);
if (WARN_ONCE(pkt_len != sizeof(*notif),
"Received window status notification of wrong size (%u)\n",
pkt_len))
return;
rcu_read_lock();
for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
struct ieee80211_sta *sta;
u8 sta_id, tid;
u64 bitmap;
u32 ssn;
u16 ratid;
u16 received_mpdu;
ratid = le16_to_cpu(notif->ra_tid[i]);
/* check that this TID is valid */
if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
continue;
received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
if (received_mpdu == 0)
continue;
tid = ratid & BA_WINDOW_STATUS_TID_MSK;
/* get the station */
sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
>> BA_WINDOW_STATUS_STA_ID_POS;
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
if (IS_ERR_OR_NULL(sta))
continue;
bitmap = le64_to_cpu(notif->bitmap[i]);
ssn = le32_to_cpu(notif->start_seq_num[i]);
/* update mac80211 with the bitmap for the reordering buffer */
ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
received_mpdu);
}
rcu_read_unlock();
}