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path: root/drivers/net/wireless/mwl8k.c
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Diffstat (limited to 'drivers/net/wireless/mwl8k.c')
-rw-r--r--drivers/net/wireless/mwl8k.c111
1 files changed, 70 insertions, 41 deletions
diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c
index 28ebaec80be6..9f5ecef297e5 100644
--- a/drivers/net/wireless/mwl8k.c
+++ b/drivers/net/wireless/mwl8k.c
@@ -74,6 +74,14 @@ MODULE_PARM_DESC(ap_mode_default,
#define MWL8K_A2H_INT_RX_READY (1 << 1)
#define MWL8K_A2H_INT_TX_DONE (1 << 0)
+/* HW micro second timer register
+ * located at offset 0xA600. This
+ * will be used to timestamp tx
+ * packets.
+ */
+
+#define MWL8K_HW_TIMER_REGISTER 0x0000a600
+
#define MWL8K_A2H_EVENTS (MWL8K_A2H_INT_DUMMY | \
MWL8K_A2H_INT_CHNL_SWITCHED | \
MWL8K_A2H_INT_QUEUE_EMPTY | \
@@ -773,8 +781,10 @@ static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
skb_pull(skb, sizeof(*tr) - hdrlen);
}
+#define REDUCED_TX_HEADROOM 8
+
static void
-mwl8k_add_dma_header(struct sk_buff *skb, int tail_pad)
+mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb, int tail_pad)
{
struct ieee80211_hdr *wh;
int hdrlen;
@@ -790,6 +800,22 @@ mwl8k_add_dma_header(struct sk_buff *skb, int tail_pad)
wh = (struct ieee80211_hdr *)skb->data;
hdrlen = ieee80211_hdrlen(wh->frame_control);
+
+ /*
+ * Check if skb_resize is required because of
+ * tx_headroom adjustment.
+ */
+ if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
+ + REDUCED_TX_HEADROOM))) {
+ if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
+
+ wiphy_err(priv->hw->wiphy,
+ "Failed to reallocate TX buffer\n");
+ return;
+ }
+ skb->truesize += REDUCED_TX_HEADROOM;
+ }
+
reqd_hdrlen = sizeof(*tr);
if (hdrlen != reqd_hdrlen)
@@ -812,7 +838,8 @@ mwl8k_add_dma_header(struct sk_buff *skb, int tail_pad)
tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
}
-static void mwl8k_encapsulate_tx_frame(struct sk_buff *skb)
+static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
+ struct sk_buff *skb)
{
struct ieee80211_hdr *wh;
struct ieee80211_tx_info *tx_info;
@@ -853,7 +880,7 @@ static void mwl8k_encapsulate_tx_frame(struct sk_buff *skb)
break;
}
}
- mwl8k_add_dma_header(skb, data_pad);
+ mwl8k_add_dma_header(priv, skb, data_pad);
}
/*
@@ -1554,24 +1581,11 @@ static int mwl8k_tid_queue_mapping(u8 tid)
/* The firmware will fill in the rate information
* for each packet that gets queued in the hardware
- * in this structure
+ * and these macros will interpret that info.
*/
-struct rateinfo {
- __le16 format:1;
- __le16 short_gi:1;
- __le16 band_width:1;
- __le16 rate_id_mcs:6;
- __le16 adv_coding:2;
- __le16 antenna:2;
- __le16 act_sub_chan:2;
- __le16 preamble_type:1;
- __le16 power_id:4;
- __le16 antenna2:1;
- __le16 reserved:1;
- __le16 tx_bf_frame:1;
- __le16 green_field:1;
-} __packed;
+#define RI_FORMAT(a) (a & 0x0001)
+#define RI_RATE_ID_MCS(a) ((a & 0x01f8) >> 3)
static int
mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
@@ -1592,7 +1606,6 @@ mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
struct ieee80211_sta *sta;
struct mwl8k_sta *sta_info = NULL;
u16 rate_info;
- struct rateinfo *rate;
struct ieee80211_hdr *wh;
tx = txq->head;
@@ -1635,14 +1648,13 @@ mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
sta_info = MWL8K_STA(sta);
BUG_ON(sta_info == NULL);
rate_info = le16_to_cpu(tx_desc->rate_info);
- rate = (struct rateinfo *)&rate_info;
/* If rate is < 6.5 Mpbs for an ht station
* do not form an ampdu. If the station is a
* legacy station (format = 0), do not form an
* ampdu
*/
- if (rate->rate_id_mcs < 1 ||
- rate->format == 0) {
+ if (RI_RATE_ID_MCS(rate_info) < 1 ||
+ RI_FORMAT(rate_info) == 0) {
sta_info->is_ampdu_allowed = false;
} else {
sta_info->is_ampdu_allowed = true;
@@ -1666,10 +1678,6 @@ mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
processed++;
}
- if (index < MWL8K_TX_WMM_QUEUES && processed && priv->radio_on &&
- !mutex_is_locked(&priv->fw_mutex))
- ieee80211_wake_queue(hw, index);
-
return processed;
}
@@ -1814,6 +1822,7 @@ mwl8k_txq_xmit(struct ieee80211_hw *hw, int index, struct sk_buff *skb)
u8 tid = 0;
struct mwl8k_ampdu_stream *stream = NULL;
bool start_ba_session = false;
+ bool mgmtframe = false;
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
wh = (struct ieee80211_hdr *)skb->data;
@@ -1822,10 +1831,13 @@ mwl8k_txq_xmit(struct ieee80211_hw *hw, int index, struct sk_buff *skb)
else
qos = 0;
+ if (ieee80211_is_mgmt(wh->frame_control))
+ mgmtframe = true;
+
if (priv->ap_fw)
- mwl8k_encapsulate_tx_frame(skb);
+ mwl8k_encapsulate_tx_frame(priv, skb);
else
- mwl8k_add_dma_header(skb, 0);
+ mwl8k_add_dma_header(priv, skb, 0);
wh = &((struct mwl8k_dma_data *)skb->data)->wh;
@@ -1951,14 +1963,26 @@ mwl8k_txq_xmit(struct ieee80211_hw *hw, int index, struct sk_buff *skb)
txq = priv->txq + index;
- if (index >= MWL8K_TX_WMM_QUEUES && txq->len >= MWL8K_TX_DESCS) {
- /* This is the case in which the tx packet is destined for an
- * AMPDU queue and that AMPDU queue is full. Because we don't
- * start and stop the AMPDU queues, we must drop these packets.
- */
- dev_kfree_skb(skb);
- spin_unlock_bh(&priv->tx_lock);
- return;
+ /* Mgmt frames that go out frequently are probe
+ * responses. Other mgmt frames got out relatively
+ * infrequently. Hence reserve 2 buffers so that
+ * other mgmt frames do not get dropped due to an
+ * already queued probe response in one of the
+ * reserved buffers.
+ */
+
+ if (txq->len >= MWL8K_TX_DESCS - 2) {
+ if (mgmtframe == false ||
+ txq->len == MWL8K_TX_DESCS) {
+ if (start_ba_session) {
+ spin_lock(&priv->stream_lock);
+ mwl8k_remove_stream(hw, stream);
+ spin_unlock(&priv->stream_lock);
+ }
+ spin_unlock_bh(&priv->tx_lock);
+ dev_kfree_skb(skb);
+ return;
+ }
}
BUG_ON(txq->skb[txq->tail] != NULL);
@@ -1975,6 +1999,11 @@ mwl8k_txq_xmit(struct ieee80211_hw *hw, int index, struct sk_buff *skb)
tx->peer_id = MWL8K_STA(tx_info->control.sta)->peer_id;
else
tx->peer_id = 0;
+
+ if (priv->ap_fw)
+ tx->timestamp = cpu_to_le32(ioread32(priv->regs +
+ MWL8K_HW_TIMER_REGISTER));
+
wmb();
tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
@@ -1985,9 +2014,6 @@ mwl8k_txq_xmit(struct ieee80211_hw *hw, int index, struct sk_buff *skb)
if (txq->tail == MWL8K_TX_DESCS)
txq->tail = 0;
- if (txq->head == txq->tail && index < MWL8K_TX_WMM_QUEUES)
- ieee80211_stop_queue(hw, index);
-
mwl8k_tx_start(priv);
spin_unlock_bh(&priv->tx_lock);
@@ -2482,7 +2508,8 @@ static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
- MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON);
+ MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
+ MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY);
cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
@@ -5466,6 +5493,8 @@ static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
hw->extra_tx_headroom =
sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
+ hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
+
hw->channel_change_time = 10;
hw->queues = MWL8K_TX_WMM_QUEUES;
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-17 00:49:22 +0000