diff options
author | John W. Linville <linville@tuxdriver.com> | 2011-05-05 17:32:35 (GMT) |
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committer | John W. Linville <linville@tuxdriver.com> | 2011-05-05 17:32:35 (GMT) |
commit | a70171dce9cd44cb06c7d299eba9fa87a8933045 (patch) | |
tree | 5425df5f33fadc617c7dec99578d06f0d933578e /drivers/net/wireless/mwl8k.c | |
parent | 5a412ad7f4c95bb5b756aa12b52646e857e7c75d (diff) | |
parent | eaef6a93bd52a2cc47b9fce201310010707afdb4 (diff) | |
download | linux-fsl-qoriq-a70171dce9cd44cb06c7d299eba9fa87a8933045.tar.xz |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem
Conflicts:
drivers/net/wireless/libertas/if_cs.c
drivers/net/wireless/rtlwifi/pci.c
net/bluetooth/l2cap_sock.c
Diffstat (limited to 'drivers/net/wireless/mwl8k.c')
-rw-r--r-- | drivers/net/wireless/mwl8k.c | 111 |
1 files changed, 70 insertions, 41 deletions
diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c index 28ebaec..9f5ecef 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; |