--- /dev/null
+/*
+ * This file is part of wl1271
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ *
+ * Contact: Luciano Coelho <luciano.coelho@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/etherdevice.h>
+#include <linux/spinlock.h>
+
+#include "wlcore.h"
+#include "debug.h"
+#include "io.h"
+#include "ps.h"
+#include "tx.h"
+#include "event.h"
+#include "hw_ops.h"
+
+/*
+ * TODO: this is here just for now, it must be removed when the data
+ * operations are in place.
+ */
+#include "../wl12xx/reg.h"
+
+static int wl1271_set_default_wep_key(struct wl1271 *wl,
+ struct wl12xx_vif *wlvif, u8 id)
+{
+ int ret;
+ bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
+
+ if (is_ap)
+ ret = wl12xx_cmd_set_default_wep_key(wl, id,
+ wlvif->ap.bcast_hlid);
+ else
+ ret = wl12xx_cmd_set_default_wep_key(wl, id, wlvif->sta.hlid);
+
+ if (ret < 0)
+ return ret;
+
+ wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id);
+ return 0;
+}
+
+static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb)
+{
+ int id;
+
+ id = find_first_zero_bit(wl->tx_frames_map, wl->num_tx_desc);
+ if (id >= wl->num_tx_desc)
+ return -EBUSY;
+
+ __set_bit(id, wl->tx_frames_map);
+ wl->tx_frames[id] = skb;
+ wl->tx_frames_cnt++;
+ return id;
+}
+
+void wl1271_free_tx_id(struct wl1271 *wl, int id)
+{
+ if (__test_and_clear_bit(id, wl->tx_frames_map)) {
+ if (unlikely(wl->tx_frames_cnt == wl->num_tx_desc))
+ clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
+
+ wl->tx_frames[id] = NULL;
+ wl->tx_frames_cnt--;
+ }
+}
+EXPORT_SYMBOL(wl1271_free_tx_id);
+
+static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl,
+ struct wl12xx_vif *wlvif,
+ struct sk_buff *skb)
+{
+ struct ieee80211_hdr *hdr;
+
+ hdr = (struct ieee80211_hdr *)(skb->data +
+ sizeof(struct wl1271_tx_hw_descr));
+ if (!ieee80211_is_auth(hdr->frame_control))
+ return;
+
+ /*
+ * add the station to the known list before transmitting the
+ * authentication response. this way it won't get de-authed by FW
+ * when transmitting too soon.
+ */
+ wl1271_acx_set_inconnection_sta(wl, wlvif, hdr->addr1);
+
+ /*
+ * ROC for 1 second on the AP channel for completing the connection.
+ * Note the ROC will be continued by the update_sta_state callbacks
+ * once the station reaches the associated state.
+ */
+ wlcore_update_inconn_sta(wl, wlvif, NULL, true);
+ wlvif->pending_auth_reply_time = jiffies;
+ cancel_delayed_work(&wlvif->pending_auth_complete_work);
+ ieee80211_queue_delayed_work(wl->hw,
+ &wlvif->pending_auth_complete_work,
+ msecs_to_jiffies(WLCORE_PEND_AUTH_ROC_TIMEOUT));
+}
+
+static void wl1271_tx_regulate_link(struct wl1271 *wl,
+ struct wl12xx_vif *wlvif,
+ u8 hlid)
+{
+ bool fw_ps;
+ u8 tx_pkts;
+
+ if (WARN_ON(!test_bit(hlid, wlvif->links_map)))
+ return;
+
+ fw_ps = test_bit(hlid, &wl->ap_fw_ps_map);
+ tx_pkts = wl->links[hlid].allocated_pkts;
+
+ /*
+ * if in FW PS and there is enough data in FW we can put the link
+ * into high-level PS and clean out its TX queues.
+ * Make an exception if this is the only connected link. In this
+ * case FW-memory congestion is less of a problem.
+ * Note that a single connected STA means 2*ap_count + 1 active links,
+ * since we must account for the global and broadcast AP links
+ * for each AP. The "fw_ps" check assures us the other link is a STA
+ * connected to the AP. Otherwise the FW would not set the PSM bit.
+ */
+ if (wl->active_link_count > (wl->ap_count*2 + 1) && fw_ps &&
+ tx_pkts >= WL1271_PS_STA_MAX_PACKETS)
+ wl12xx_ps_link_start(wl, wlvif, hlid, true);
+}
+
+bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb)
+{
+ return wl->dummy_packet == skb;
+}
+EXPORT_SYMBOL(wl12xx_is_dummy_packet);
+
+static u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif,
+ struct sk_buff *skb, struct ieee80211_sta *sta)
+{
+ if (sta) {
+ struct wl1271_station *wl_sta;
+
+ wl_sta = (struct wl1271_station *)sta->drv_priv;
+ return wl_sta->hlid;
+ } else {
+ struct ieee80211_hdr *hdr;
+
+ if (!test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags))
+ return wl->system_hlid;
+
+ hdr = (struct ieee80211_hdr *)skb->data;
+ if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
+ return wlvif->ap.bcast_hlid;
+ else
+ return wlvif->ap.global_hlid;
+ }
+}
+
+u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif,
+ struct sk_buff *skb, struct ieee80211_sta *sta)
+{
+ struct ieee80211_tx_info *control;
+
+ if (wlvif->bss_type == BSS_TYPE_AP_BSS)
+ return wl12xx_tx_get_hlid_ap(wl, wlvif, skb, sta);
+
+ control = IEEE80211_SKB_CB(skb);
+ if (control->flags & IEEE80211_TX_CTL_TX_OFFCHAN) {
+ wl1271_debug(DEBUG_TX, "tx offchannel");
+ return wlvif->dev_hlid;
+ }
+
+ return wlvif->sta.hlid;
+}
+
+unsigned int wlcore_calc_packet_alignment(struct wl1271 *wl,
+ unsigned int packet_length)
+{
+ if ((wl->quirks & WLCORE_QUIRK_TX_PAD_LAST_FRAME) ||
+ !(wl->quirks & WLCORE_QUIRK_TX_BLOCKSIZE_ALIGN))
+ return ALIGN(packet_length, WL1271_TX_ALIGN_TO);
+ else
+ return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE);
+}
+EXPORT_SYMBOL(wlcore_calc_packet_alignment);
+
+static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif,
+ struct sk_buff *skb, u32 extra, u32 buf_offset,
+ u8 hlid, bool is_gem)
+{
+ struct wl1271_tx_hw_descr *desc;
+ u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
+ u32 total_blocks;
+ int id, ret = -EBUSY, ac;
+ u32 spare_blocks;
+
+ if (buf_offset + total_len > wl->aggr_buf_size)
+ return -EAGAIN;
+
+ spare_blocks = wlcore_hw_get_spare_blocks(wl, is_gem);
+
+ /* allocate free identifier for the packet */
+ id = wl1271_alloc_tx_id(wl, skb);
+ if (id < 0)
+ return id;
+
+ total_blocks = wlcore_hw_calc_tx_blocks(wl, total_len, spare_blocks);
+
+ if (total_blocks <= wl->tx_blocks_available) {
+ desc = (struct wl1271_tx_hw_descr *)skb_push(
+ skb, total_len - skb->len);
+
+ wlcore_hw_set_tx_desc_blocks(wl, desc, total_blocks,
+ spare_blocks);
+
+ desc->id = id;
+
+ wl->tx_blocks_available -= total_blocks;
+ wl->tx_allocated_blocks += total_blocks;
+
+ /*
+ * If the FW was empty before, arm the Tx watchdog. Also do
+ * this on the first Tx after resume, as we always cancel the
+ * watchdog on suspend.
+ */
+ if (wl->tx_allocated_blocks == total_blocks ||
+ test_and_clear_bit(WL1271_FLAG_REINIT_TX_WDOG, &wl->flags))
+ wl12xx_rearm_tx_watchdog_locked(wl);
+
+ ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
+ wl->tx_allocated_pkts[ac]++;
+
+ if (test_bit(hlid, wl->links_map))
+ wl->links[hlid].allocated_pkts++;
+
+ ret = 0;
+
+ wl1271_debug(DEBUG_TX,
+ "tx_allocate: size: %d, blocks: %d, id: %d",
+ total_len, total_blocks, id);
+ } else {
+ wl1271_free_tx_id(wl, id);
+ }
+
+ return ret;
+}
+
+static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif,
+ struct sk_buff *skb, u32 extra,
+ struct ieee80211_tx_info *control, u8 hlid)
+{
+ struct timespec ts;
+ struct wl1271_tx_hw_descr *desc;
+ int ac, rate_idx;
+ s64 hosttime;
+ u16 tx_attr = 0;
+ __le16 frame_control;
+ struct ieee80211_hdr *hdr;
+ u8 *frame_start;
+ bool is_dummy;
+
+ desc = (struct wl1271_tx_hw_descr *) skb->data;
+ frame_start = (u8 *)(desc + 1);
+ hdr = (struct ieee80211_hdr *)(frame_start + extra);
+ frame_control = hdr->frame_control;
+
+ /* relocate space for security header */
+ if (extra) {
+ int hdrlen = ieee80211_hdrlen(frame_control);
+ memmove(frame_start, hdr, hdrlen);
+ skb_set_network_header(skb, skb_network_offset(skb) + extra);
+ }
+
+ /* configure packet life time */
+ getnstimeofday(&ts);
+ hosttime = (timespec_to_ns(&ts) >> 10);
+ desc->start_time = cpu_to_le32(hosttime - wl->time_offset);
+
+ is_dummy = wl12xx_is_dummy_packet(wl, skb);
+ if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS)
+ desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU);
+ else
+ desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU);
+
+ /* queue */
+ ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
+ desc->tid = skb->priority;
+
+ if (is_dummy) {
+ /*
+ * FW expects the dummy packet to have an invalid session id -
+ * any session id that is different than the one set in the join
+ */
+ tx_attr = (SESSION_COUNTER_INVALID <<
+ TX_HW_ATTR_OFST_SESSION_COUNTER) &
+ TX_HW_ATTR_SESSION_COUNTER;
+
+ tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ;
+ } else if (wlvif) {
+ u8 session_id = wl->session_ids[hlid];
+
+ if ((wl->quirks & WLCORE_QUIRK_AP_ZERO_SESSION_ID) &&
+ (wlvif->bss_type == BSS_TYPE_AP_BSS))
+ session_id = 0;
+
+ /* configure the tx attributes */
+ tx_attr = session_id << TX_HW_ATTR_OFST_SESSION_COUNTER;
+ }
+
+ desc->hlid = hlid;
+ if (is_dummy || !wlvif)
+ rate_idx = 0;
+ else if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
+ /*
+ * if the packets are data packets
+ * send them with AP rate policies (EAPOLs are an exception),
+ * otherwise use default basic rates
+ */
+ if (skb->protocol == cpu_to_be16(ETH_P_PAE))
+ rate_idx = wlvif->sta.basic_rate_idx;
+ else if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE)
+ rate_idx = wlvif->sta.p2p_rate_idx;
+ else if (ieee80211_is_data(frame_control))
+ rate_idx = wlvif->sta.ap_rate_idx;
+ else
+ rate_idx = wlvif->sta.basic_rate_idx;
+ } else {
+ if (hlid == wlvif->ap.global_hlid)
+ rate_idx = wlvif->ap.mgmt_rate_idx;
+ else if (hlid == wlvif->ap.bcast_hlid ||
+ skb->protocol == cpu_to_be16(ETH_P_PAE) ||
+ !ieee80211_is_data(frame_control))
+ /*
+ * send non-data, bcast and EAPOLs using the
+ * min basic rate
+ */
+ rate_idx = wlvif->ap.bcast_rate_idx;
+ else
+ rate_idx = wlvif->ap.ucast_rate_idx[ac];
+ }
+
+ tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY;
+
+ /* for WEP shared auth - no fw encryption is needed */
+ if (ieee80211_is_auth(frame_control) &&
+ ieee80211_has_protected(frame_control))
+ tx_attr |= TX_HW_ATTR_HOST_ENCRYPT;
+
+ /* send EAPOL frames as voice */
+ if (control->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO)
+ tx_attr |= TX_HW_ATTR_EAPOL_FRAME;
+
+ desc->tx_attr = cpu_to_le16(tx_attr);
+
+ wlcore_hw_set_tx_desc_csum(wl, desc, skb);
+ wlcore_hw_set_tx_desc_data_len(wl, desc, skb);
+}
+
+/* caller must hold wl->mutex */
+static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif,
+ struct sk_buff *skb, u32 buf_offset, u8 hlid)
+{
+ struct ieee80211_tx_info *info;
+ u32 extra = 0;
+ int ret = 0;
+ u32 total_len;
+ bool is_dummy;
+ bool is_gem = false;
+
+ if (!skb) {
+ wl1271_error("discarding null skb");
+ return -EINVAL;
+ }
+
+ if (hlid == WL12XX_INVALID_LINK_ID) {
+ wl1271_error("invalid hlid. dropping skb 0x%p", skb);
+ return -EINVAL;
+ }
+
+ info = IEEE80211_SKB_CB(skb);
+
+ is_dummy = wl12xx_is_dummy_packet(wl, skb);
+
+ if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
+ info->control.hw_key &&
+ info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
+ extra = WL1271_EXTRA_SPACE_TKIP;
+
+ if (info->control.hw_key) {
+ bool is_wep;
+ u8 idx = info->control.hw_key->hw_key_idx;
+ u32 cipher = info->control.hw_key->cipher;
+
+ is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) ||
+ (cipher == WLAN_CIPHER_SUITE_WEP104);
+
+ if (WARN_ON(is_wep && wlvif && wlvif->default_key != idx)) {
+ ret = wl1271_set_default_wep_key(wl, wlvif, idx);
+ if (ret < 0)
+ return ret;
+ wlvif->default_key = idx;
+ }
+
+ is_gem = (cipher == WL1271_CIPHER_SUITE_GEM);
+ }
+
+ ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid,
+ is_gem);
+ if (ret < 0)
+ return ret;
+
+ wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid);
+
+ if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) {
+ wl1271_tx_ap_update_inconnection_sta(wl, wlvif, skb);
+ wl1271_tx_regulate_link(wl, wlvif, hlid);
+ }
+
+ /*
+ * The length of each packet is stored in terms of
+ * words. Thus, we must pad the skb data to make sure its
+ * length is aligned. The number of padding bytes is computed
+ * and set in wl1271_tx_fill_hdr.
+ * In special cases, we want to align to a specific block size
+ * (eg. for wl128x with SDIO we align to 256).
+ */
+ total_len = wlcore_calc_packet_alignment(wl, skb->len);
+
+ memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len);
+ memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len);
+
+ /* 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 - 31 */
+ rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates;
+
+ for (bit = 0; bit < 16; 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)
+{
+ int i;
+ struct wl12xx_vif *wlvif;
+
+ wl12xx_for_each_wlvif(wl, wlvif) {
+ for (i = 0; i < NUM_TX_QUEUES; i++) {
+ if (wlcore_is_queue_stopped_by_reason(wl, wlvif, i,
+ WLCORE_QUEUE_STOP_REASON_WATERMARK) &&
+ wlvif->tx_queue_count[i] <=
+ WL1271_TX_QUEUE_LOW_WATERMARK)
+ /* firmware buffer has space, restart queues */
+ wlcore_wake_queue(wl, wlvif, i,
+ WLCORE_QUEUE_STOP_REASON_WATERMARK);
+ }
+ }
+}
+
+static int wlcore_select_ac(struct wl1271 *wl)
+{
+ 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 (wl->tx_queue_count[ac] &&
+ wl->tx_allocated_pkts[ac] < min_pkts) {
+ q = ac;
+ min_pkts = wl->tx_allocated_pkts[q];
+ }
+ }
+
+ return q;
+}
+
+static struct sk_buff *wlcore_lnk_dequeue(struct wl1271 *wl,
+ struct wl1271_link *lnk, u8 q)
+{
+ struct sk_buff *skb;
+ unsigned long flags;
+
+ skb = skb_dequeue(&lnk->tx_queue[q]);
+ if (skb) {
+ spin_lock_irqsave(&wl->wl_lock, flags);
+ WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
+ wl->tx_queue_count[q]--;
+ if (lnk->wlvif) {
+ WARN_ON_ONCE(lnk->wlvif->tx_queue_count[q] <= 0);
+ lnk->wlvif->tx_queue_count[q]--;
+ }
+ spin_unlock_irqrestore(&wl->wl_lock, flags);
+ }
+
+ return skb;
+}
+
+static struct sk_buff *wlcore_lnk_dequeue_high_prio(struct wl1271 *wl,
+ u8 hlid, u8 ac,
+ u8 *low_prio_hlid)
+{
+ struct wl1271_link *lnk = &wl->links[hlid];
+
+ if (!wlcore_hw_lnk_high_prio(wl, hlid, lnk)) {
+ if (*low_prio_hlid == WL12XX_INVALID_LINK_ID &&
+ !skb_queue_empty(&lnk->tx_queue[ac]) &&
+ wlcore_hw_lnk_low_prio(wl, hlid, lnk))
+ /* we found the first non-empty low priority queue */
+ *low_prio_hlid = hlid;
+
+ return NULL;
+ }
+
+ return wlcore_lnk_dequeue(wl, lnk, ac);
+}
+
+static struct sk_buff *wlcore_vif_dequeue_high_prio(struct wl1271 *wl,
+ struct wl12xx_vif *wlvif,
+ u8 ac, u8 *hlid,
+ u8 *low_prio_hlid)
+{
+ 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) % wl->num_links;
+
+ /* dequeue according to AC, round robin on each link */
+ for (i = 0; i < wl->num_links; i++) {
+ h = (start_hlid + i) % wl->num_links;
+
+ /* only consider connected stations */
+ if (!test_bit(h, wlvif->links_map))
+ continue;
+
+ skb = wlcore_lnk_dequeue_high_prio(wl, h, ac,
+ low_prio_hlid);
+ if (!skb)
+ continue;
+
+ wlvif->last_tx_hlid = h;
+ break;
+ }
+
+ if (!skb)
+ wlvif->last_tx_hlid = 0;
+
+ *hlid = wlvif->last_tx_hlid;
+ return skb;
+}
+
+static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl, u8 *hlid)
+{
+ unsigned long flags;
+ struct wl12xx_vif *wlvif = wl->last_wlvif;
+ struct sk_buff *skb = NULL;
+ int ac;
+ u8 low_prio_hlid = WL12XX_INVALID_LINK_ID;
+
+ ac = wlcore_select_ac(wl);
+ if (ac < 0)
+ goto out;
+
+ /* continue from last wlvif (round robin) */
+ if (wlvif) {
+ wl12xx_for_each_wlvif_continue(wl, wlvif) {
+ if (!wlvif->tx_queue_count[ac])
+ continue;
+
+ skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid,
+ &low_prio_hlid);
+ if (!skb)
+ continue;
+
+ wl->last_wlvif = wlvif;
+ break;
+ }
+ }
+
+ /* dequeue from the system HLID before the restarting wlvif list */
+ if (!skb) {
+ skb = wlcore_lnk_dequeue_high_prio(wl, wl->system_hlid,
+ ac, &low_prio_hlid);
+ if (skb) {
+ *hlid = wl->system_hlid;
+ wl->last_wlvif = NULL;
+ }
+ }
+
+ /* Do a new pass over the wlvif list. But no need to continue
+ * after last_wlvif. The previous pass should have found it. */
+ if (!skb) {
+ wl12xx_for_each_wlvif(wl, wlvif) {
+ if (!wlvif->tx_queue_count[ac])
+ goto next;
+
+ skb = wlcore_vif_dequeue_high_prio(wl, wlvif, ac, hlid,
+ &low_prio_hlid);
+ if (skb) {
+ wl->last_wlvif = wlvif;
+ break;
+ }
+
+next:
+ if (wlvif == wl->last_wlvif)
+ break;
+ }
+ }
+
+ /* no high priority skbs found - but maybe a low priority one? */
+ if (!skb && low_prio_hlid != WL12XX_INVALID_LINK_ID) {
+ struct wl1271_link *lnk = &wl->links[low_prio_hlid];
+ skb = wlcore_lnk_dequeue(wl, lnk, ac);
+
+ WARN_ON(!skb); /* we checked this before */
+ *hlid = low_prio_hlid;
+
+ /* ensure proper round robin in the vif/link levels */
+ wl->last_wlvif = lnk->wlvif;
+ if (lnk->wlvif)
+ lnk->wlvif->last_tx_hlid = low_prio_hlid;
+
+ }
+
+out:
+ if (!skb &&
+ test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) {
+ int q;
+
+ skb = wl->dummy_packet;
+ *hlid = wl->system_hlid;
+ q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
+ spin_lock_irqsave(&wl->wl_lock, flags);
+ WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
+ 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, u8 hlid)
+{
+ 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 {
+ skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
+
+ /* make sure we dequeue the same packet next time */
+ wlvif->last_tx_hlid = (hlid + wl->num_links - 1) %
+ wl->num_links;
+ }
+
+ spin_lock_irqsave(&wl->wl_lock, flags);
+ wl->tx_queue_count[q]++;
+ if (wlvif)
+ wlvif->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, wl->num_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));
+ }
+}
+
+/*
+ * Returns failure values only in case of failed bus ops within this function.
+ * wl1271_prepare_tx_frame retvals won't be returned in order to avoid
+ * triggering recovery by higher layers when not necessary.
+ * In case a FW command fails within wl1271_prepare_tx_frame fails a recovery
+ * will be queued in wl1271_cmd_send. -EAGAIN/-EBUSY from prepare_tx_frame
+ * can occur and are legitimate so don't propagate. -EINVAL will emit a WARNING
+ * within prepare_tx_frame code but there's nothing we should do about those
+ * as well.
+ */
+int wlcore_tx_work_locked(struct wl1271 *wl)
+{
+ struct wl12xx_vif *wlvif;
+ struct sk_buff *skb;
+ struct wl1271_tx_hw_descr *desc;
+ u32 buf_offset = 0, last_len = 0;
+ bool sent_packets = false;
+ unsigned long active_hlids[BITS_TO_LONGS(WLCORE_MAX_LINKS)] = {0};
+ int ret = 0;
+ int bus_ret = 0;
+ u8 hlid;
+
+ if (unlikely(wl->state != WLCORE_STATE_ON))
+ return 0;
+
+ while ((skb = wl1271_skb_dequeue(wl, &hlid))) {
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ bool has_data = false;
+
+ wlvif = NULL;
+ if (!wl12xx_is_dummy_packet(wl, skb))
+ wlvif = wl12xx_vif_to_data(info->control.vif);
+ else
+ hlid = wl->system_hlid;
+
+ has_data = wlvif && wl1271_tx_is_data_present(skb);
+ ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset,
+ hlid);
+ if (ret == -EAGAIN) {
+ /*
+ * Aggregation buffer is full.
+ * Flush buffer and try again.
+ */
+ wl1271_skb_queue_head(wl, wlvif, skb, hlid);
+
+ buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset,
+ last_len);
+ bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA,
+ wl->aggr_buf, buf_offset, true);
+ if (bus_ret < 0)
+ goto out;
+
+ 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, hlid);
+ /* 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, hlid);
+ else
+ ieee80211_free_txskb(wl->hw, skb);
+ goto out_ack;
+ }
+ last_len = ret;
+ buf_offset += last_len;
+ 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) {
+ buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset, last_len);
+ bus_ret = wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf,
+ buf_offset, true);
+ if (bus_ret < 0)
+ goto out;
+
+ sent_packets = true;
+ }
+ if (sent_packets) {
+ /*
+ * Interrupt the firmware with the new packets. This is only
+ * required for older hardware revisions
+ */
+ if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION) {
+ bus_ret = wlcore_write32(wl, WL12XX_HOST_WR_ACCESS,
+ wl->tx_packets_count);
+ if (bus_ret < 0)
+ goto out;
+ }
+
+ wl1271_handle_tx_low_watermark(wl);
+ }
+ wl12xx_rearm_rx_streaming(wl, active_hlids);
+
+out:
+ return bus_ret;
+}
+
+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;
+
+ ret = wlcore_tx_work_locked(wl);
+ if (ret < 0) {
+ wl12xx_queue_recovery_work(wl);
+ goto out;
+ }
+
+ wl1271_ps_elp_sleep(wl);
+out:
+ mutex_unlock(&wl->mutex);
+}
+
+static u8 wl1271_tx_get_rate_flags(u8 rate_class_index)
+{
+ u8 flags = 0;
+
+ /*
+ * TODO: use wl12xx constants when this code is moved to wl12xx, as
+ * only it uses Tx-completion.
+ */
+ if (rate_class_index <= 8)
+ flags |= IEEE80211_TX_RC_MCS;
+
+ /*
+ * TODO: use wl12xx constants when this code is moved to wl12xx, as
+ * only it uses Tx-completion.
+ */
+ if (rate_class_index == 0)
+ flags |= IEEE80211_TX_RC_SHORT_GI;
+
+ return flags;
+}
+
+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 rate_flags = 0;
+ u8 retries = 0;
+
+ /* check for id legality */
+ if (unlikely(id >= wl->num_tx_desc || 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 = wlcore_rate_to_idx(wl, result->rate_class_index,
+ wlvif->band);
+ rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index);
+ 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 = rate_flags;
+ info->status.ack_signal = -1;
+
+ wl->stats.retry_count += result->ack_failures;
+
+ /* remove private header from packet */
+ skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
+
+ /* remove TKIP header space if present */
+ if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
+ 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_EXTRA_SPACE_TKIP, skb->data,
+ hdrlen);
+ skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
+ }
+
+ 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 */
+int wlcore_tx_complete(struct wl1271 *wl)
+{
+ struct wl1271_acx_mem_map *memmap = wl->target_mem_map;
+ u32 count, fw_counter;
+ u32 i;
+ int ret;
+
+ /* read the tx results from the chipset */
+ ret = wlcore_read(wl, le32_to_cpu(memmap->tx_result),
+ wl->tx_res_if, sizeof(*wl->tx_res_if), false);
+ if (ret < 0)
+ goto out;
+
+ fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter);
+
+ /* write host counter to chipset (to ack) */
+ ret = wlcore_write32(wl, le32_to_cpu(memmap->tx_result) +
+ offsetof(struct wl1271_tx_hw_res_if,
+ tx_result_host_counter), fw_counter);
+ if (ret < 0)
+ goto out;
+
+ 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++;
+ }
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL(wlcore_tx_complete);
+
+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];
+ struct wl1271_link *lnk = &wl->links[hlid];
+
+ for (i = 0; i < NUM_TX_QUEUES; i++) {
+ total[i] = 0;
+ while ((skb = skb_dequeue(&lnk->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];
+ if (lnk->wlvif)
+ lnk->wlvif->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, wl->num_links) {
+ if (wlvif->bss_type == BSS_TYPE_AP_BSS &&
+ i != wlvif->ap.bcast_hlid && i != wlvif->ap.global_hlid) {
+ /* this calls wl12xx_free_link */
+ wl1271_free_sta(wl, wlvif, i);
+ } else {
+ u8 hlid = i;
+ wl12xx_free_link(wl, wlvif, &hlid);
+ }
+ }
+ wlvif->last_tx_hlid = 0;
+
+ for (i = 0; i < NUM_TX_QUEUES; i++)
+ wlvif->tx_queue_count[i] = 0;
+}
+/* caller must hold wl->mutex and TX must be stopped */
+void wl12xx_tx_reset(struct wl1271 *wl)
+{
+ int i;
+ struct sk_buff *skb;
+ struct ieee80211_tx_info *info;
+
+ /* only reset the queues if something bad happened */
+ if (wl1271_tx_total_queue_count(wl) != 0) {
+ for (i = 0; i < wl->num_links; i++)
+ wl1271_tx_reset_link_queues(wl, i);
+
+ for (i = 0; i < NUM_TX_QUEUES; i++)
+ wl->tx_queue_count[i] = 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.
+ */
+ wl1271_handle_tx_low_watermark(wl);
+
+ for (i = 0; i < wl->num_tx_desc; 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 ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
+ 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_EXTRA_SPACE_TKIP,
+ skb->data, hdrlen);
+ skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
+ }
+
+ 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, start_time;
+ int i;
+ start_time = jiffies;
+ timeout = start_time + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
+
+ /* only one flush should be in progress, for consistent queue state */
+ mutex_lock(&wl->flush_mutex);
+
+ mutex_lock(&wl->mutex);
+ if (wl->tx_frames_cnt == 0 && wl1271_tx_total_queue_count(wl) == 0) {
+ mutex_unlock(&wl->mutex);
+ goto out;
+ }
+
+ wlcore_stop_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
+
+ while (!time_after(jiffies, timeout)) {
+ wl1271_debug(DEBUG_MAC80211, "flushing tx buffer: %d %d",
+ wl->tx_frames_cnt,
+ wl1271_tx_total_queue_count(wl));
+
+ /* force Tx and give the driver some time to flush data */
+ mutex_unlock(&wl->mutex);
+ if (wl1271_tx_total_queue_count(wl))
+ wl1271_tx_work(&wl->tx_work);
+ msleep(20);
+ mutex_lock(&wl->mutex);
+
+ if ((wl->tx_frames_cnt == 0) &&
+ (wl1271_tx_total_queue_count(wl) == 0)) {
+ wl1271_debug(DEBUG_MAC80211, "tx flush took %d ms",
+ jiffies_to_msecs(jiffies - start_time));
+ goto out_wake;
+ }
+ }
+
+ wl1271_warning("Unable to flush all TX buffers, "
+ "timed out (timeout %d ms",
+ WL1271_TX_FLUSH_TIMEOUT / 1000);
+
+ /* forcibly flush all Tx buffers on our queues */
+ for (i = 0; i < wl->num_links; i++)
+ wl1271_tx_reset_link_queues(wl, i);
+
+out_wake:
+ wlcore_wake_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
+ mutex_unlock(&wl->mutex);
+out:
+ mutex_unlock(&wl->flush_mutex);
+}
+EXPORT_SYMBOL_GPL(wl1271_tx_flush);
+
+u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set)
+{
+ if (WARN_ON(!rate_set))
+ return 0;
+
+ return BIT(__ffs(rate_set));
+}
+EXPORT_SYMBOL_GPL(wl1271_tx_min_rate_get);
+
+void wlcore_stop_queue_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
+ u8 queue, enum wlcore_queue_stop_reason reason)
+{
+ int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
+ bool stopped = !!wl->queue_stop_reasons[hwq];
+
+ /* queue should not be stopped for this reason */
+ WARN_ON_ONCE(test_and_set_bit(reason, &wl->queue_stop_reasons[hwq]));
+
+ if (stopped)
+ return;
+
+ ieee80211_stop_queue(wl->hw, hwq);
+}
+
+void wlcore_stop_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
+ enum wlcore_queue_stop_reason reason)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&wl->wl_lock, flags);
+ wlcore_stop_queue_locked(wl, wlvif, queue, reason);
+ spin_unlock_irqrestore(&wl->wl_lock, flags);
+}
+
+void wlcore_wake_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
+ enum wlcore_queue_stop_reason reason)
+{
+ unsigned long flags;
+ int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
+
+ spin_lock_irqsave(&wl->wl_lock, flags);
+
+ /* queue should not be clear for this reason */
+ WARN_ON_ONCE(!test_and_clear_bit(reason, &wl->queue_stop_reasons[hwq]));
+
+ if (wl->queue_stop_reasons[hwq])
+ goto out;
+
+ ieee80211_wake_queue(wl->hw, hwq);
+
+out:
+ spin_unlock_irqrestore(&wl->wl_lock, flags);
+}
+
+void wlcore_stop_queues(struct wl1271 *wl,
+ enum wlcore_queue_stop_reason reason)
+{
+ int i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&wl->wl_lock, flags);
+
+ /* mark all possible queues as stopped */
+ for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++)
+ WARN_ON_ONCE(test_and_set_bit(reason,
+ &wl->queue_stop_reasons[i]));
+
+ /* use the global version to make sure all vifs in mac80211 we don't
+ * know are stopped.
+ */
+ ieee80211_stop_queues(wl->hw);
+
+ spin_unlock_irqrestore(&wl->wl_lock, flags);
+}
+
+void wlcore_wake_queues(struct wl1271 *wl,
+ enum wlcore_queue_stop_reason reason)
+{
+ int i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&wl->wl_lock, flags);
+
+ /* mark all possible queues as awake */
+ for (i = 0; i < WLCORE_NUM_MAC_ADDRESSES * NUM_TX_QUEUES; i++)
+ WARN_ON_ONCE(!test_and_clear_bit(reason,
+ &wl->queue_stop_reasons[i]));
+
+ /* use the global version to make sure all vifs in mac80211 we don't
+ * know are woken up.
+ */
+ ieee80211_wake_queues(wl->hw);
+
+ spin_unlock_irqrestore(&wl->wl_lock, flags);
+}
+
+bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl,
+ struct wl12xx_vif *wlvif, u8 queue,
+ enum wlcore_queue_stop_reason reason)
+{
+ unsigned long flags;
+ bool stopped;
+
+ spin_lock_irqsave(&wl->wl_lock, flags);
+ stopped = wlcore_is_queue_stopped_by_reason_locked(wl, wlvif, queue,
+ reason);
+ spin_unlock_irqrestore(&wl->wl_lock, flags);
+
+ return stopped;
+}
+
+bool wlcore_is_queue_stopped_by_reason_locked(struct wl1271 *wl,
+ struct wl12xx_vif *wlvif, u8 queue,
+ enum wlcore_queue_stop_reason reason)
+{
+ int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
+
+ assert_spin_locked(&wl->wl_lock);
+ return test_bit(reason, &wl->queue_stop_reasons[hwq]);
+}
+
+bool wlcore_is_queue_stopped_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
+ u8 queue)
+{
+ int hwq = wlcore_tx_get_mac80211_queue(wlvif, queue);
+
+ assert_spin_locked(&wl->wl_lock);
+ return !!wl->queue_stop_reasons[hwq];
+}
Code Review / kvmfornfv.git / blobdiff