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path: root/drivers/net/wireless/wl12xx/tx.c
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Diffstat (limited to 'drivers/net/wireless/wl12xx/tx.c')
-rw-r--r--drivers/net/wireless/wl12xx/tx.c143
1 files changed, 97 insertions, 46 deletions
diff --git a/drivers/net/wireless/wl12xx/tx.c b/drivers/net/wireless/wl12xx/tx.c
index 200590c0d9e..48fde96ce0d 100644
--- a/drivers/net/wireless/wl12xx/tx.c
+++ b/drivers/net/wireless/wl12xx/tx.c
@@ -168,7 +168,7 @@ static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra,
u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
u32 len;
u32 total_blocks;
- int id, ret = -EBUSY;
+ int id, ret = -EBUSY, ac;
u32 spare_blocks;
if (unlikely(wl->quirks & WL12XX_QUIRK_USE_2_SPARE_BLOCKS))
@@ -206,7 +206,9 @@ static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra,
desc->id = id;
wl->tx_blocks_available -= total_blocks;
- wl->tx_allocated_blocks += total_blocks;
+
+ ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
+ wl->tx_allocated_blocks[ac] += total_blocks;
if (wl->bss_type == BSS_TYPE_AP_BSS)
wl->links[hlid].allocated_blks += total_blocks;
@@ -383,6 +385,8 @@ static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct sk_buff *skb,
if (ret < 0)
return ret;
+ wl1271_tx_fill_hdr(wl, skb, extra, info, hlid);
+
if (wl->bss_type == BSS_TYPE_AP_BSS) {
wl1271_tx_ap_update_inconnection_sta(wl, skb);
wl1271_tx_regulate_link(wl, hlid);
@@ -390,8 +394,6 @@ static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct sk_buff *skb,
wl1271_tx_update_filters(wl, skb);
}
- wl1271_tx_fill_hdr(wl, skb, extra, info, hlid);
-
/*
* The length of each packet is stored in terms of
* words. Thus, we must pad the skb data to make sure its
@@ -442,37 +444,62 @@ u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set)
void wl1271_handle_tx_low_watermark(struct wl1271 *wl)
{
unsigned long flags;
+ int i;
- if (test_bit(WL1271_FLAG_TX_QUEUE_STOPPED, &wl->flags) &&
- wl->tx_queue_count <= WL1271_TX_QUEUE_LOW_WATERMARK) {
- /* firmware buffer has space, restart queues */
- spin_lock_irqsave(&wl->wl_lock, flags);
- ieee80211_wake_queues(wl->hw);
- clear_bit(WL1271_FLAG_TX_QUEUE_STOPPED, &wl->flags);
- spin_unlock_irqrestore(&wl->wl_lock, flags);
+ 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;
+ u32 min_blks = 0xffffffff;
+
+ /*
+ * Find a non-empty ac where:
+ * 1. There are packets to transmit
+ * 2. The FW has the least allocated blocks
+ */
+ for (i = 0; i < NUM_TX_QUEUES; i++)
+ if (!skb_queue_empty(&queues[i]) &&
+ (wl->tx_allocated_blocks[i] < min_blks)) {
+ q = i;
+ min_blks = wl->tx_allocated_blocks[q];
+ }
+
+ if (q == -1)
+ return NULL;
+
+ return &queues[q];
+}
+
static struct sk_buff *wl1271_sta_skb_dequeue(struct wl1271 *wl)
{
struct sk_buff *skb = NULL;
unsigned long flags;
+ struct sk_buff_head *queue;
- skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_VO]);
- if (skb)
- goto out;
- skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_VI]);
- if (skb)
+ queue = wl1271_select_queue(wl, wl->tx_queue);
+ if (!queue)
goto out;
- skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_BE]);
- if (skb)
- goto out;
- skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_BK]);
+
+ skb = skb_dequeue(queue);
out:
if (skb) {
+ int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
spin_lock_irqsave(&wl->wl_lock, flags);
- wl->tx_queue_count--;
+ wl->tx_queue_count[q]--;
spin_unlock_irqrestore(&wl->wl_lock, flags);
}
@@ -484,6 +511,7 @@ static struct sk_buff *wl1271_ap_skb_dequeue(struct wl1271 *wl)
struct sk_buff *skb = NULL;
unsigned long flags;
int i, h, start_hlid;
+ struct sk_buff_head *queue;
/* start from the link after the last one */
start_hlid = (wl->last_tx_hlid + 1) % AP_MAX_LINKS;
@@ -492,25 +520,25 @@ static struct sk_buff *wl1271_ap_skb_dequeue(struct wl1271 *wl)
for (i = 0; i < AP_MAX_LINKS; i++) {
h = (start_hlid + i) % AP_MAX_LINKS;
- skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_VO]);
- if (skb)
- goto out;
- skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_VI]);
- if (skb)
- goto out;
- skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_BE]);
- if (skb)
- goto out;
- skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_BK]);
+ /* only consider connected stations */
+ if (h >= WL1271_AP_STA_HLID_START &&
+ !test_bit(h - WL1271_AP_STA_HLID_START, wl->ap_hlid_map))
+ continue;
+
+ queue = wl1271_select_queue(wl, wl->links[h].tx_queue);
+ if (!queue)
+ continue;
+
+ skb = skb_dequeue(queue);
if (skb)
- goto out;
+ break;
}
-out:
if (skb) {
+ int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
wl->last_tx_hlid = h;
spin_lock_irqsave(&wl->wl_lock, flags);
- wl->tx_queue_count--;
+ wl->tx_queue_count[q]--;
spin_unlock_irqrestore(&wl->wl_lock, flags);
} else {
wl->last_tx_hlid = 0;
@@ -531,9 +559,12 @@ static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl)
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--;
+ wl->tx_queue_count[q]--;
spin_unlock_irqrestore(&wl->wl_lock, flags);
}
@@ -558,7 +589,7 @@ static void wl1271_skb_queue_head(struct wl1271 *wl, struct sk_buff *skb)
}
spin_lock_irqsave(&wl->wl_lock, flags);
- wl->tx_queue_count++;
+ wl->tx_queue_count[q]++;
spin_unlock_irqrestore(&wl->wl_lock, flags);
}
@@ -704,10 +735,24 @@ static void wl1271_tx_complete_packet(struct wl1271 *wl,
wl->stats.retry_count += result->ack_failures;
- /* update security sequence number */
- wl->tx_security_seq += (result->lsb_security_sequence_number -
- wl->tx_security_last_seq);
- wl->tx_security_last_seq = result->lsb_security_sequence_number;
+ /*
+ * 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 = wl->tx_security_last_seq_lsb;
+
+ /*
+ * update security sequence number, taking care of potential
+ * wrap-around
+ */
+ wl->tx_security_seq += (fw_lsb - cur_lsb + 256) % 256;
+ wl->tx_security_last_seq_lsb = fw_lsb;
+ }
/* remove private header from packet */
skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
@@ -772,23 +817,26 @@ void wl1271_tx_complete(struct wl1271 *wl)
void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
{
struct sk_buff *skb;
- int i, total = 0;
+ 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);
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++;
+ total[i]++;
}
}
spin_lock_irqsave(&wl->wl_lock, flags);
- wl->tx_queue_count -= total;
+ 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);
@@ -823,10 +871,11 @@ void wl1271_tx_reset(struct wl1271 *wl, bool reset_tx_queues)
ieee80211_tx_status_ni(wl->hw, skb);
}
}
+ wl->tx_queue_count[i] = 0;
}
}
- wl->tx_queue_count = 0;
+ wl->stopped_queues_map = 0;
/*
* Make sure the driver is at a consistent state, in case this
@@ -879,8 +928,10 @@ void wl1271_tx_flush(struct wl1271 *wl)
while (!time_after(jiffies, timeout)) {
mutex_lock(&wl->mutex);
wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d",
- wl->tx_frames_cnt, wl->tx_queue_count);
- if ((wl->tx_frames_cnt == 0) && (wl->tx_queue_count == 0)) {
+ 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;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-22 14:53:47 +0000