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![Eliad Peller](/assets/img/avatar_default.png)
Use the newly introduced ieee80211_free_txskb() instead of dev_kfree_skb() for failed tx packets. Additionally, if the skb is a dummy packet, re-enqueue it (as the fw expects it) instead of freeing it. Reported-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: Luciano Coelho <coelho@ti.com>
1059 lines
27 KiB
C
1059 lines
27 KiB
C
/*
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* This file is part of wl1271
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*
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* Copyright (C) 2009 Nokia Corporation
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*
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* Contact: Luciano Coelho <luciano.coelho@nokia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as 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 St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/etherdevice.h>
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#include "wl12xx.h"
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#include "debug.h"
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#include "io.h"
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#include "reg.h"
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#include "ps.h"
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#include "tx.h"
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#include "event.h"
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static int wl1271_set_default_wep_key(struct wl1271 *wl,
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struct wl12xx_vif *wlvif, u8 id)
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{
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int ret;
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bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
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if (is_ap)
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ret = wl12xx_cmd_set_default_wep_key(wl, id,
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wlvif->ap.bcast_hlid);
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else
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ret = wl12xx_cmd_set_default_wep_key(wl, id, wlvif->sta.hlid);
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if (ret < 0)
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return ret;
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wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id);
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return 0;
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}
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static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb)
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{
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int id;
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id = find_first_zero_bit(wl->tx_frames_map, ACX_TX_DESCRIPTORS);
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if (id >= ACX_TX_DESCRIPTORS)
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return -EBUSY;
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__set_bit(id, wl->tx_frames_map);
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wl->tx_frames[id] = skb;
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wl->tx_frames_cnt++;
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return id;
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}
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static void wl1271_free_tx_id(struct wl1271 *wl, int id)
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{
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if (__test_and_clear_bit(id, wl->tx_frames_map)) {
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if (unlikely(wl->tx_frames_cnt == ACX_TX_DESCRIPTORS))
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clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
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wl->tx_frames[id] = NULL;
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wl->tx_frames_cnt--;
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}
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}
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static int wl1271_tx_update_filters(struct wl1271 *wl,
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struct wl12xx_vif *wlvif,
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struct sk_buff *skb)
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{
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struct ieee80211_hdr *hdr;
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int ret;
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hdr = (struct ieee80211_hdr *)skb->data;
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/*
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* stop bssid-based filtering before transmitting authentication
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* requests. this way the hw will never drop authentication
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* responses coming from BSSIDs it isn't familiar with (e.g. on
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* roaming)
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*/
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if (!ieee80211_is_auth(hdr->frame_control))
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return 0;
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if (wlvif->dev_hlid != WL12XX_INVALID_LINK_ID)
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goto out;
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wl1271_debug(DEBUG_CMD, "starting device role for roaming");
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ret = wl12xx_start_dev(wl, wlvif);
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if (ret < 0)
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goto out;
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out:
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return 0;
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}
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static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl,
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struct sk_buff *skb)
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{
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struct ieee80211_hdr *hdr;
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/*
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* add the station to the known list before transmitting the
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* authentication response. this way it won't get de-authed by FW
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* when transmitting too soon.
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*/
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hdr = (struct ieee80211_hdr *)(skb->data +
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sizeof(struct wl1271_tx_hw_descr));
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if (ieee80211_is_auth(hdr->frame_control))
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wl1271_acx_set_inconnection_sta(wl, hdr->addr1);
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}
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static void wl1271_tx_regulate_link(struct wl1271 *wl,
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struct wl12xx_vif *wlvif,
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u8 hlid)
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{
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bool fw_ps, single_sta;
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u8 tx_pkts;
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if (WARN_ON(!test_bit(hlid, wlvif->links_map)))
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return;
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fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map);
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tx_pkts = wl->links[hlid].allocated_pkts;
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single_sta = (wl->active_sta_count == 1);
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/*
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* if in FW PS and there is enough data in FW we can put the link
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* into high-level PS and clean out its TX queues.
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* Make an exception if this is the only connected station. In this
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* case FW-memory congestion is not a problem.
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*/
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if (!single_sta && fw_ps && tx_pkts >= WL1271_PS_STA_MAX_PACKETS)
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wl12xx_ps_link_start(wl, wlvif, hlid, true);
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}
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bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb)
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{
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return wl->dummy_packet == skb;
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}
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u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif,
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struct sk_buff *skb)
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{
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struct ieee80211_tx_info *control = IEEE80211_SKB_CB(skb);
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if (control->control.sta) {
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struct wl1271_station *wl_sta;
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wl_sta = (struct wl1271_station *)
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control->control.sta->drv_priv;
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return wl_sta->hlid;
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} else {
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struct ieee80211_hdr *hdr;
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if (!test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags))
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return wl->system_hlid;
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hdr = (struct ieee80211_hdr *)skb->data;
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if (ieee80211_is_mgmt(hdr->frame_control))
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return wlvif->ap.global_hlid;
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else
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return wlvif->ap.bcast_hlid;
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}
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}
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u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif,
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struct sk_buff *skb)
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{
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
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if (!wlvif || wl12xx_is_dummy_packet(wl, skb))
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return wl->system_hlid;
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if (wlvif->bss_type == BSS_TYPE_AP_BSS)
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return wl12xx_tx_get_hlid_ap(wl, wlvif, skb);
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wl1271_tx_update_filters(wl, wlvif, skb);
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if ((test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags) ||
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test_bit(WLVIF_FLAG_IBSS_JOINED, &wlvif->flags)) &&
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!ieee80211_is_auth(hdr->frame_control) &&
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!ieee80211_is_assoc_req(hdr->frame_control))
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return wlvif->sta.hlid;
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else
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return wlvif->dev_hlid;
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}
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static unsigned int wl12xx_calc_packet_alignment(struct wl1271 *wl,
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unsigned int packet_length)
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{
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if (wl->quirks & WL12XX_QUIRK_NO_BLOCKSIZE_ALIGNMENT)
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return ALIGN(packet_length, WL1271_TX_ALIGN_TO);
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else
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return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE);
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}
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static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif,
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struct sk_buff *skb, u32 extra, u32 buf_offset,
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u8 hlid)
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{
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struct wl1271_tx_hw_descr *desc;
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u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
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u32 len;
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u32 total_blocks;
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int id, ret = -EBUSY, ac;
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u32 spare_blocks = wl->tx_spare_blocks;
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bool is_dummy = false;
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if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE)
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return -EAGAIN;
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/* allocate free identifier for the packet */
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id = wl1271_alloc_tx_id(wl, skb);
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if (id < 0)
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return id;
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/* approximate the number of blocks required for this packet
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in the firmware */
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len = wl12xx_calc_packet_alignment(wl, total_len);
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/* in case of a dummy packet, use default amount of spare mem blocks */
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if (unlikely(wl12xx_is_dummy_packet(wl, skb))) {
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is_dummy = true;
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spare_blocks = TX_HW_BLOCK_SPARE_DEFAULT;
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}
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total_blocks = (len + TX_HW_BLOCK_SIZE - 1) / TX_HW_BLOCK_SIZE +
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spare_blocks;
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if (total_blocks <= wl->tx_blocks_available) {
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desc = (struct wl1271_tx_hw_descr *)skb_push(
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skb, total_len - skb->len);
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/* HW descriptor fields change between wl127x and wl128x */
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if (wl->chip.id == CHIP_ID_1283_PG20) {
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desc->wl128x_mem.total_mem_blocks = total_blocks;
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} else {
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desc->wl127x_mem.extra_blocks = spare_blocks;
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desc->wl127x_mem.total_mem_blocks = total_blocks;
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}
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desc->id = id;
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wl->tx_blocks_available -= total_blocks;
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wl->tx_allocated_blocks += total_blocks;
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ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
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wl->tx_allocated_pkts[ac]++;
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if (!is_dummy && wlvif &&
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wlvif->bss_type == BSS_TYPE_AP_BSS &&
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test_bit(hlid, wlvif->ap.sta_hlid_map))
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wl->links[hlid].allocated_pkts++;
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ret = 0;
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wl1271_debug(DEBUG_TX,
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"tx_allocate: size: %d, blocks: %d, id: %d",
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total_len, total_blocks, id);
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} else {
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wl1271_free_tx_id(wl, id);
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}
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return ret;
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}
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static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif,
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struct sk_buff *skb, u32 extra,
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struct ieee80211_tx_info *control, u8 hlid)
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{
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struct timespec ts;
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struct wl1271_tx_hw_descr *desc;
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int aligned_len, ac, rate_idx;
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s64 hosttime;
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u16 tx_attr = 0;
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bool is_dummy;
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desc = (struct wl1271_tx_hw_descr *) skb->data;
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/* relocate space for security header */
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if (extra) {
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void *framestart = skb->data + sizeof(*desc);
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u16 fc = *(u16 *)(framestart + extra);
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int hdrlen = ieee80211_hdrlen(cpu_to_le16(fc));
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memmove(framestart, framestart + extra, hdrlen);
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}
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/* configure packet life time */
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getnstimeofday(&ts);
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hosttime = (timespec_to_ns(&ts) >> 10);
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desc->start_time = cpu_to_le32(hosttime - wl->time_offset);
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is_dummy = wl12xx_is_dummy_packet(wl, skb);
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if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS)
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desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU);
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else
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desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU);
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/* queue */
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ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
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desc->tid = skb->priority;
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if (is_dummy) {
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/*
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* FW expects the dummy packet to have an invalid session id -
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* any session id that is different than the one set in the join
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*/
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tx_attr = (SESSION_COUNTER_INVALID <<
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TX_HW_ATTR_OFST_SESSION_COUNTER) &
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TX_HW_ATTR_SESSION_COUNTER;
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tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ;
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} else if (wlvif) {
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/* configure the tx attributes */
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tx_attr = wlvif->session_counter <<
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TX_HW_ATTR_OFST_SESSION_COUNTER;
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}
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desc->hlid = hlid;
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if (is_dummy || !wlvif)
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rate_idx = 0;
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else if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
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/* if the packets are destined for AP (have a STA entry)
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send them with AP rate policies, otherwise use default
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basic rates */
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if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE)
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rate_idx = wlvif->sta.p2p_rate_idx;
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else if (control->control.sta)
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rate_idx = wlvif->sta.ap_rate_idx;
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else
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rate_idx = wlvif->sta.basic_rate_idx;
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} else {
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if (hlid == wlvif->ap.global_hlid)
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rate_idx = wlvif->ap.mgmt_rate_idx;
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else if (hlid == wlvif->ap.bcast_hlid)
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rate_idx = wlvif->ap.bcast_rate_idx;
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else
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rate_idx = wlvif->ap.ucast_rate_idx[ac];
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}
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tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY;
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desc->reserved = 0;
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aligned_len = wl12xx_calc_packet_alignment(wl, skb->len);
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if (wl->chip.id == CHIP_ID_1283_PG20) {
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desc->wl128x_mem.extra_bytes = aligned_len - skb->len;
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desc->length = cpu_to_le16(aligned_len >> 2);
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wl1271_debug(DEBUG_TX, "tx_fill_hdr: hlid: %d "
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"tx_attr: 0x%x len: %d life: %d mem: %d",
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desc->hlid, tx_attr,
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le16_to_cpu(desc->length),
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le16_to_cpu(desc->life_time),
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desc->wl128x_mem.total_mem_blocks);
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} else {
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int pad;
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/* Store the aligned length in terms of words */
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desc->length = cpu_to_le16(aligned_len >> 2);
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/* calculate number of padding bytes */
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pad = aligned_len - skb->len;
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tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD;
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wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d hlid: %d "
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"tx_attr: 0x%x len: %d life: %d mem: %d", pad,
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desc->hlid, tx_attr,
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le16_to_cpu(desc->length),
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le16_to_cpu(desc->life_time),
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desc->wl127x_mem.total_mem_blocks);
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}
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desc->tx_attr = cpu_to_le16(tx_attr);
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}
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/* caller must hold wl->mutex */
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static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif,
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struct sk_buff *skb, u32 buf_offset)
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{
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struct ieee80211_tx_info *info;
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u32 extra = 0;
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int ret = 0;
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u32 total_len;
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u8 hlid;
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bool is_dummy;
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if (!skb)
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return -EINVAL;
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info = IEEE80211_SKB_CB(skb);
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/* TODO: handle dummy packets on multi-vifs */
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is_dummy = wl12xx_is_dummy_packet(wl, skb);
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if (info->control.hw_key &&
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info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
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extra = WL1271_TKIP_IV_SPACE;
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if (info->control.hw_key) {
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bool is_wep;
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u8 idx = info->control.hw_key->hw_key_idx;
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u32 cipher = info->control.hw_key->cipher;
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is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) ||
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(cipher == WLAN_CIPHER_SUITE_WEP104);
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if (unlikely(is_wep && wlvif->default_key != idx)) {
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ret = wl1271_set_default_wep_key(wl, wlvif, idx);
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if (ret < 0)
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return ret;
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wlvif->default_key = idx;
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}
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}
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hlid = wl12xx_tx_get_hlid(wl, wlvif, skb);
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if (hlid == WL12XX_INVALID_LINK_ID) {
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wl1271_error("invalid hlid. dropping skb 0x%p", skb);
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return -EINVAL;
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}
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ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid);
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if (ret < 0)
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return ret;
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wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid);
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if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) {
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wl1271_tx_ap_update_inconnection_sta(wl, skb);
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wl1271_tx_regulate_link(wl, wlvif, hlid);
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}
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/*
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* The length of each packet is stored in terms of
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* words. Thus, we must pad the skb data to make sure its
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* length is aligned. The number of padding bytes is computed
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* and set in wl1271_tx_fill_hdr.
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* In special cases, we want to align to a specific block size
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* (eg. for wl128x with SDIO we align to 256).
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*/
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total_len = wl12xx_calc_packet_alignment(wl, skb->len);
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memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len);
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memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len);
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|
|
/* Revert side effects in the dummy packet skb, so it can be reused */
|
|
if (is_dummy)
|
|
skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
|
|
|
|
return total_len;
|
|
}
|
|
|
|
u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set,
|
|
enum ieee80211_band rate_band)
|
|
{
|
|
struct ieee80211_supported_band *band;
|
|
u32 enabled_rates = 0;
|
|
int bit;
|
|
|
|
band = wl->hw->wiphy->bands[rate_band];
|
|
for (bit = 0; bit < band->n_bitrates; bit++) {
|
|
if (rate_set & 0x1)
|
|
enabled_rates |= band->bitrates[bit].hw_value;
|
|
rate_set >>= 1;
|
|
}
|
|
|
|
/* MCS rates indication are on bits 16 - 23 */
|
|
rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates;
|
|
|
|
for (bit = 0; bit < 8; bit++) {
|
|
if (rate_set & 0x1)
|
|
enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit);
|
|
rate_set >>= 1;
|
|
}
|
|
|
|
return enabled_rates;
|
|
}
|
|
|
|
void wl1271_handle_tx_low_watermark(struct wl1271 *wl)
|
|
{
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
for (i = 0; i < NUM_TX_QUEUES; i++) {
|
|
if (test_bit(i, &wl->stopped_queues_map) &&
|
|
wl->tx_queue_count[i] <= WL1271_TX_QUEUE_LOW_WATERMARK) {
|
|
/* firmware buffer has space, restart queues */
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
ieee80211_wake_queue(wl->hw,
|
|
wl1271_tx_get_mac80211_queue(i));
|
|
clear_bit(i, &wl->stopped_queues_map);
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
}
|
|
}
|
|
}
|
|
|
|
static struct sk_buff_head *wl1271_select_queue(struct wl1271 *wl,
|
|
struct sk_buff_head *queues)
|
|
{
|
|
int i, q = -1, ac;
|
|
u32 min_pkts = 0xffffffff;
|
|
|
|
/*
|
|
* Find a non-empty ac where:
|
|
* 1. There are packets to transmit
|
|
* 2. The FW has the least allocated blocks
|
|
*
|
|
* We prioritize the ACs according to VO>VI>BE>BK
|
|
*/
|
|
for (i = 0; i < NUM_TX_QUEUES; i++) {
|
|
ac = wl1271_tx_get_queue(i);
|
|
if (!skb_queue_empty(&queues[ac]) &&
|
|
(wl->tx_allocated_pkts[ac] < min_pkts)) {
|
|
q = ac;
|
|
min_pkts = wl->tx_allocated_pkts[q];
|
|
}
|
|
}
|
|
|
|
if (q == -1)
|
|
return NULL;
|
|
|
|
return &queues[q];
|
|
}
|
|
|
|
static struct sk_buff *wl12xx_lnk_skb_dequeue(struct wl1271 *wl,
|
|
struct wl1271_link *lnk)
|
|
{
|
|
struct sk_buff *skb;
|
|
unsigned long flags;
|
|
struct sk_buff_head *queue;
|
|
|
|
queue = wl1271_select_queue(wl, lnk->tx_queue);
|
|
if (!queue)
|
|
return NULL;
|
|
|
|
skb = skb_dequeue(queue);
|
|
if (skb) {
|
|
int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
wl->tx_queue_count[q]--;
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
static struct sk_buff *wl12xx_vif_skb_dequeue(struct wl1271 *wl,
|
|
struct wl12xx_vif *wlvif)
|
|
{
|
|
struct sk_buff *skb = NULL;
|
|
int i, h, start_hlid;
|
|
|
|
/* start from the link after the last one */
|
|
start_hlid = (wlvif->last_tx_hlid + 1) % WL12XX_MAX_LINKS;
|
|
|
|
/* dequeue according to AC, round robin on each link */
|
|
for (i = 0; i < WL12XX_MAX_LINKS; i++) {
|
|
h = (start_hlid + i) % WL12XX_MAX_LINKS;
|
|
|
|
/* only consider connected stations */
|
|
if (!test_bit(h, wlvif->links_map))
|
|
continue;
|
|
|
|
skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[h]);
|
|
if (!skb)
|
|
continue;
|
|
|
|
wlvif->last_tx_hlid = h;
|
|
break;
|
|
}
|
|
|
|
if (!skb)
|
|
wlvif->last_tx_hlid = 0;
|
|
|
|
return skb;
|
|
}
|
|
|
|
static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl)
|
|
{
|
|
unsigned long flags;
|
|
struct wl12xx_vif *wlvif = wl->last_wlvif;
|
|
struct sk_buff *skb = NULL;
|
|
|
|
if (wlvif) {
|
|
wl12xx_for_each_wlvif_continue(wl, wlvif) {
|
|
skb = wl12xx_vif_skb_dequeue(wl, wlvif);
|
|
if (skb) {
|
|
wl->last_wlvif = wlvif;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* do another pass */
|
|
if (!skb) {
|
|
wl12xx_for_each_wlvif(wl, wlvif) {
|
|
skb = wl12xx_vif_skb_dequeue(wl, wlvif);
|
|
if (skb) {
|
|
wl->last_wlvif = wlvif;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!skb)
|
|
skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[wl->system_hlid]);
|
|
|
|
if (!skb &&
|
|
test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) {
|
|
int q;
|
|
|
|
skb = wl->dummy_packet;
|
|
q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
wl->tx_queue_count[q]--;
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif,
|
|
struct sk_buff *skb)
|
|
{
|
|
unsigned long flags;
|
|
int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
|
|
|
|
if (wl12xx_is_dummy_packet(wl, skb)) {
|
|
set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags);
|
|
} else {
|
|
u8 hlid = wl12xx_tx_get_hlid(wl, wlvif, skb);
|
|
skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
|
|
|
|
/* make sure we dequeue the same packet next time */
|
|
wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) %
|
|
WL12XX_MAX_LINKS;
|
|
}
|
|
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
wl->tx_queue_count[q]++;
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
}
|
|
|
|
static bool wl1271_tx_is_data_present(struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
|
|
|
|
return ieee80211_is_data_present(hdr->frame_control);
|
|
}
|
|
|
|
void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids)
|
|
{
|
|
struct wl12xx_vif *wlvif;
|
|
u32 timeout;
|
|
u8 hlid;
|
|
|
|
if (!wl->conf.rx_streaming.interval)
|
|
return;
|
|
|
|
if (!wl->conf.rx_streaming.always &&
|
|
!test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))
|
|
return;
|
|
|
|
timeout = wl->conf.rx_streaming.duration;
|
|
wl12xx_for_each_wlvif_sta(wl, wlvif) {
|
|
bool found = false;
|
|
for_each_set_bit(hlid, active_hlids, WL12XX_MAX_LINKS) {
|
|
if (test_bit(hlid, wlvif->links_map)) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found)
|
|
continue;
|
|
|
|
/* enable rx streaming */
|
|
if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags))
|
|
ieee80211_queue_work(wl->hw,
|
|
&wlvif->rx_streaming_enable_work);
|
|
|
|
mod_timer(&wlvif->rx_streaming_timer,
|
|
jiffies + msecs_to_jiffies(timeout));
|
|
}
|
|
}
|
|
|
|
void wl1271_tx_work_locked(struct wl1271 *wl)
|
|
{
|
|
struct wl12xx_vif *wlvif;
|
|
struct sk_buff *skb;
|
|
struct wl1271_tx_hw_descr *desc;
|
|
u32 buf_offset = 0;
|
|
bool sent_packets = false;
|
|
unsigned long active_hlids[BITS_TO_LONGS(WL12XX_MAX_LINKS)] = {0};
|
|
int ret;
|
|
|
|
if (unlikely(wl->state == WL1271_STATE_OFF))
|
|
return;
|
|
|
|
while ((skb = wl1271_skb_dequeue(wl))) {
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
bool has_data = false;
|
|
|
|
wlvif = NULL;
|
|
if (!wl12xx_is_dummy_packet(wl, skb) && info->control.vif)
|
|
wlvif = wl12xx_vif_to_data(info->control.vif);
|
|
|
|
has_data = wlvif && wl1271_tx_is_data_present(skb);
|
|
ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset);
|
|
if (ret == -EAGAIN) {
|
|
/*
|
|
* Aggregation buffer is full.
|
|
* Flush buffer and try again.
|
|
*/
|
|
wl1271_skb_queue_head(wl, wlvif, skb);
|
|
wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf,
|
|
buf_offset, true);
|
|
sent_packets = true;
|
|
buf_offset = 0;
|
|
continue;
|
|
} else if (ret == -EBUSY) {
|
|
/*
|
|
* Firmware buffer is full.
|
|
* Queue back last skb, and stop aggregating.
|
|
*/
|
|
wl1271_skb_queue_head(wl, wlvif, skb);
|
|
/* No work left, avoid scheduling redundant tx work */
|
|
set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
|
|
goto out_ack;
|
|
} else if (ret < 0) {
|
|
if (wl12xx_is_dummy_packet(wl, skb))
|
|
/*
|
|
* fw still expects dummy packet,
|
|
* so re-enqueue it
|
|
*/
|
|
wl1271_skb_queue_head(wl, wlvif, skb);
|
|
else
|
|
ieee80211_free_txskb(wl->hw, skb);
|
|
goto out_ack;
|
|
}
|
|
buf_offset += ret;
|
|
wl->tx_packets_count++;
|
|
if (has_data) {
|
|
desc = (struct wl1271_tx_hw_descr *) skb->data;
|
|
__set_bit(desc->hlid, active_hlids);
|
|
}
|
|
}
|
|
|
|
out_ack:
|
|
if (buf_offset) {
|
|
wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf,
|
|
buf_offset, true);
|
|
sent_packets = true;
|
|
}
|
|
if (sent_packets) {
|
|
/*
|
|
* Interrupt the firmware with the new packets. This is only
|
|
* required for older hardware revisions
|
|
*/
|
|
if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION)
|
|
wl1271_write32(wl, WL1271_HOST_WR_ACCESS,
|
|
wl->tx_packets_count);
|
|
|
|
wl1271_handle_tx_low_watermark(wl);
|
|
}
|
|
wl12xx_rearm_rx_streaming(wl, active_hlids);
|
|
}
|
|
|
|
void wl1271_tx_work(struct work_struct *work)
|
|
{
|
|
struct wl1271 *wl = container_of(work, struct wl1271, tx_work);
|
|
int ret;
|
|
|
|
mutex_lock(&wl->mutex);
|
|
ret = wl1271_ps_elp_wakeup(wl);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
wl1271_tx_work_locked(wl);
|
|
|
|
wl1271_ps_elp_sleep(wl);
|
|
out:
|
|
mutex_unlock(&wl->mutex);
|
|
}
|
|
|
|
static void wl1271_tx_complete_packet(struct wl1271 *wl,
|
|
struct wl1271_tx_hw_res_descr *result)
|
|
{
|
|
struct ieee80211_tx_info *info;
|
|
struct ieee80211_vif *vif;
|
|
struct wl12xx_vif *wlvif;
|
|
struct sk_buff *skb;
|
|
int id = result->id;
|
|
int rate = -1;
|
|
u8 retries = 0;
|
|
|
|
/* check for id legality */
|
|
if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) {
|
|
wl1271_warning("TX result illegal id: %d", id);
|
|
return;
|
|
}
|
|
|
|
skb = wl->tx_frames[id];
|
|
info = IEEE80211_SKB_CB(skb);
|
|
|
|
if (wl12xx_is_dummy_packet(wl, skb)) {
|
|
wl1271_free_tx_id(wl, id);
|
|
return;
|
|
}
|
|
|
|
/* info->control is valid as long as we don't update info->status */
|
|
vif = info->control.vif;
|
|
wlvif = wl12xx_vif_to_data(vif);
|
|
|
|
/* update the TX status info */
|
|
if (result->status == TX_SUCCESS) {
|
|
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
|
|
info->flags |= IEEE80211_TX_STAT_ACK;
|
|
rate = wl1271_rate_to_idx(result->rate_class_index,
|
|
wlvif->band);
|
|
retries = result->ack_failures;
|
|
} else if (result->status == TX_RETRY_EXCEEDED) {
|
|
wl->stats.excessive_retries++;
|
|
retries = result->ack_failures;
|
|
}
|
|
|
|
info->status.rates[0].idx = rate;
|
|
info->status.rates[0].count = retries;
|
|
info->status.rates[0].flags = 0;
|
|
info->status.ack_signal = -1;
|
|
|
|
wl->stats.retry_count += result->ack_failures;
|
|
|
|
/*
|
|
* update sequence number only when relevant, i.e. only in
|
|
* sessions of TKIP, AES and GEM (not in open or WEP sessions)
|
|
*/
|
|
if (info->control.hw_key &&
|
|
(info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP ||
|
|
info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP ||
|
|
info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) {
|
|
u8 fw_lsb = result->tx_security_sequence_number_lsb;
|
|
u8 cur_lsb = wlvif->tx_security_last_seq_lsb;
|
|
|
|
/*
|
|
* update security sequence number, taking care of potential
|
|
* wrap-around
|
|
*/
|
|
wlvif->tx_security_seq += (fw_lsb - cur_lsb) & 0xff;
|
|
wlvif->tx_security_last_seq_lsb = fw_lsb;
|
|
}
|
|
|
|
/* remove private header from packet */
|
|
skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
|
|
|
|
/* remove TKIP header space if present */
|
|
if (info->control.hw_key &&
|
|
info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
|
|
int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
|
|
memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, hdrlen);
|
|
skb_pull(skb, WL1271_TKIP_IV_SPACE);
|
|
}
|
|
|
|
wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
|
|
" status 0x%x",
|
|
result->id, skb, result->ack_failures,
|
|
result->rate_class_index, result->status);
|
|
|
|
/* return the packet to the stack */
|
|
skb_queue_tail(&wl->deferred_tx_queue, skb);
|
|
queue_work(wl->freezable_wq, &wl->netstack_work);
|
|
wl1271_free_tx_id(wl, result->id);
|
|
}
|
|
|
|
/* Called upon reception of a TX complete interrupt */
|
|
void wl1271_tx_complete(struct wl1271 *wl)
|
|
{
|
|
struct wl1271_acx_mem_map *memmap =
|
|
(struct wl1271_acx_mem_map *)wl->target_mem_map;
|
|
u32 count, fw_counter;
|
|
u32 i;
|
|
|
|
/* read the tx results from the chipset */
|
|
wl1271_read(wl, le32_to_cpu(memmap->tx_result),
|
|
wl->tx_res_if, sizeof(*wl->tx_res_if), false);
|
|
fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter);
|
|
|
|
/* write host counter to chipset (to ack) */
|
|
wl1271_write32(wl, le32_to_cpu(memmap->tx_result) +
|
|
offsetof(struct wl1271_tx_hw_res_if,
|
|
tx_result_host_counter), fw_counter);
|
|
|
|
count = fw_counter - wl->tx_results_count;
|
|
wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count);
|
|
|
|
/* verify that the result buffer is not getting overrun */
|
|
if (unlikely(count > TX_HW_RESULT_QUEUE_LEN))
|
|
wl1271_warning("TX result overflow from chipset: %d", count);
|
|
|
|
/* process the results */
|
|
for (i = 0; i < count; i++) {
|
|
struct wl1271_tx_hw_res_descr *result;
|
|
u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK;
|
|
|
|
/* process the packet */
|
|
result = &(wl->tx_res_if->tx_results_queue[offset]);
|
|
wl1271_tx_complete_packet(wl, result);
|
|
|
|
wl->tx_results_count++;
|
|
}
|
|
}
|
|
|
|
void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
|
|
{
|
|
struct sk_buff *skb;
|
|
int i;
|
|
unsigned long flags;
|
|
struct ieee80211_tx_info *info;
|
|
int total[NUM_TX_QUEUES];
|
|
|
|
for (i = 0; i < NUM_TX_QUEUES; i++) {
|
|
total[i] = 0;
|
|
while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) {
|
|
wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb);
|
|
|
|
if (!wl12xx_is_dummy_packet(wl, skb)) {
|
|
info = IEEE80211_SKB_CB(skb);
|
|
info->status.rates[0].idx = -1;
|
|
info->status.rates[0].count = 0;
|
|
ieee80211_tx_status_ni(wl->hw, skb);
|
|
}
|
|
|
|
total[i]++;
|
|
}
|
|
}
|
|
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
for (i = 0; i < NUM_TX_QUEUES; i++)
|
|
wl->tx_queue_count[i] -= total[i];
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
|
|
wl1271_handle_tx_low_watermark(wl);
|
|
}
|
|
|
|
/* caller must hold wl->mutex and TX must be stopped */
|
|
void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif)
|
|
{
|
|
int i;
|
|
|
|
/* TX failure */
|
|
for_each_set_bit(i, wlvif->links_map, WL12XX_MAX_LINKS) {
|
|
if (wlvif->bss_type == BSS_TYPE_AP_BSS)
|
|
wl1271_free_sta(wl, wlvif, i);
|
|
else
|
|
wlvif->sta.ba_rx_bitmap = 0;
|
|
|
|
wl1271_tx_reset_link_queues(wl, i);
|
|
wl->links[i].allocated_pkts = 0;
|
|
wl->links[i].prev_freed_pkts = 0;
|
|
}
|
|
wlvif->last_tx_hlid = 0;
|
|
|
|
}
|
|
/* caller must hold wl->mutex and TX must be stopped */
|
|
void wl12xx_tx_reset(struct wl1271 *wl, bool reset_tx_queues)
|
|
{
|
|
int i;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_tx_info *info;
|
|
|
|
for (i = 0; i < NUM_TX_QUEUES; i++)
|
|
wl->tx_queue_count[i] = 0;
|
|
|
|
wl->stopped_queues_map = 0;
|
|
|
|
/*
|
|
* Make sure the driver is at a consistent state, in case this
|
|
* function is called from a context other than interface removal.
|
|
* This call will always wake the TX queues.
|
|
*/
|
|
if (reset_tx_queues)
|
|
wl1271_handle_tx_low_watermark(wl);
|
|
|
|
for (i = 0; i < ACX_TX_DESCRIPTORS; i++) {
|
|
if (wl->tx_frames[i] == NULL)
|
|
continue;
|
|
|
|
skb = wl->tx_frames[i];
|
|
wl1271_free_tx_id(wl, i);
|
|
wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb);
|
|
|
|
if (!wl12xx_is_dummy_packet(wl, skb)) {
|
|
/*
|
|
* Remove private headers before passing the skb to
|
|
* mac80211
|
|
*/
|
|
info = IEEE80211_SKB_CB(skb);
|
|
skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
|
|
if (info->control.hw_key &&
|
|
info->control.hw_key->cipher ==
|
|
WLAN_CIPHER_SUITE_TKIP) {
|
|
int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
|
|
memmove(skb->data + WL1271_TKIP_IV_SPACE,
|
|
skb->data, hdrlen);
|
|
skb_pull(skb, WL1271_TKIP_IV_SPACE);
|
|
}
|
|
|
|
info->status.rates[0].idx = -1;
|
|
info->status.rates[0].count = 0;
|
|
|
|
ieee80211_tx_status_ni(wl->hw, skb);
|
|
}
|
|
}
|
|
}
|
|
|
|
#define WL1271_TX_FLUSH_TIMEOUT 500000
|
|
|
|
/* caller must *NOT* hold wl->mutex */
|
|
void wl1271_tx_flush(struct wl1271 *wl)
|
|
{
|
|
unsigned long timeout;
|
|
timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
|
|
|
|
while (!time_after(jiffies, timeout)) {
|
|
mutex_lock(&wl->mutex);
|
|
wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d",
|
|
wl->tx_frames_cnt,
|
|
wl1271_tx_total_queue_count(wl));
|
|
if ((wl->tx_frames_cnt == 0) &&
|
|
(wl1271_tx_total_queue_count(wl) == 0)) {
|
|
mutex_unlock(&wl->mutex);
|
|
return;
|
|
}
|
|
mutex_unlock(&wl->mutex);
|
|
msleep(1);
|
|
}
|
|
|
|
wl1271_warning("Unable to flush all TX buffers, timed out.");
|
|
}
|
|
|
|
u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set)
|
|
{
|
|
if (WARN_ON(!rate_set))
|
|
return 0;
|
|
|
|
return BIT(__ffs(rate_set));
|
|
}
|