[deliverable/linux.git] / drivers / net / wireless / ath / wcn36xx / txrx.c

/*
 * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include "txrx.h"

static inline int get_rssi0(struct wcn36xx_rx_bd *bd)
{
	return 100 - ((bd->phy_stat0 >> 24) & 0xff);
}

int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)
{
	struct ieee80211_rx_status status;
	struct ieee80211_hdr *hdr;
	struct wcn36xx_rx_bd *bd;
	u16 fc, sn;

	/*
	 * All fields must be 0, otherwise it can lead to
	 * unexpected consequences.
	 */
	memset(&status, 0, sizeof(status));

	bd = (struct wcn36xx_rx_bd *)skb->data;
	buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32));
	wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP,
			 "BD   <<< ", (char *)bd,
			 sizeof(struct wcn36xx_rx_bd));

	skb_put(skb, bd->pdu.mpdu_header_off + bd->pdu.mpdu_len);
	skb_pull(skb, bd->pdu.mpdu_header_off);

	status.mactime = 10;
	status.freq = WCN36XX_CENTER_FREQ(wcn);
	status.band = WCN36XX_BAND(wcn);
	status.signal = -get_rssi0(bd);
	status.antenna = 1;
	status.rate_idx = 1;
	status.flag = 0;
	status.rx_flags = 0;
	status.flag |= RX_FLAG_IV_STRIPPED |
		       RX_FLAG_MMIC_STRIPPED |
		       RX_FLAG_DECRYPTED;

	wcn36xx_dbg(WCN36XX_DBG_RX, "status.flags=%llx\n", status.flag);

	memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));

	hdr = (struct ieee80211_hdr *) skb->data;
	fc = __le16_to_cpu(hdr->frame_control);
	sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl));

	if (ieee80211_is_beacon(hdr->frame_control)) {
		wcn36xx_dbg(WCN36XX_DBG_BEACON, "beacon skb %p len %d fc %04x sn %d\n",
			    skb, skb->len, fc, sn);
		wcn36xx_dbg_dump(WCN36XX_DBG_BEACON_DUMP, "SKB <<< ",
				 (char *)skb->data, skb->len);
	} else {
		wcn36xx_dbg(WCN36XX_DBG_RX, "rx skb %p len %d fc %04x sn %d\n",
			    skb, skb->len, fc, sn);
		wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, "SKB <<< ",
				 (char *)skb->data, skb->len);
	}

	ieee80211_rx_irqsafe(wcn->hw, skb);

	return 0;
}

static void wcn36xx_set_tx_pdu(struct wcn36xx_tx_bd *bd,
			       u32 mpdu_header_len,
			       u32 len,
			       u16 tid)
{
	bd->pdu.mpdu_header_len = mpdu_header_len;
	bd->pdu.mpdu_header_off = sizeof(*bd);
	bd->pdu.mpdu_data_off = bd->pdu.mpdu_header_len +
		bd->pdu.mpdu_header_off;
	bd->pdu.mpdu_len = len;
	bd->pdu.tid = tid;
	bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_QOS;
}

static inline struct wcn36xx_vif *get_vif_by_addr(struct wcn36xx *wcn,
						  u8 *addr)
{
	struct wcn36xx_vif *vif_priv = NULL;
	struct ieee80211_vif *vif = NULL;
	list_for_each_entry(vif_priv, &wcn->vif_list, list) {
			vif = container_of((void *)vif_priv,
				   struct ieee80211_vif,
				   drv_priv);
			if (memcmp(vif->addr, addr, ETH_ALEN) == 0)
				return vif_priv;
	}
	wcn36xx_warn("vif %pM not found\n", addr);
	return NULL;
}

static void wcn36xx_tx_start_ampdu(struct wcn36xx *wcn,
				   struct wcn36xx_sta *sta_priv,
				   struct sk_buff *skb)
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
	struct ieee80211_sta *sta;
	u8 *qc, tid;

	if (!conf_is_ht(&wcn->hw->conf))
		return;

	sta = wcn36xx_priv_to_sta(sta_priv);

	if (WARN_ON(!ieee80211_is_data_qos(hdr->frame_control)))
		return;

	if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
		return;

	qc = ieee80211_get_qos_ctl(hdr);
	tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;

	spin_lock(&sta_priv->ampdu_lock);
	if (sta_priv->ampdu_state[tid] != WCN36XX_AMPDU_NONE)
		goto out_unlock;

	if (sta_priv->non_agg_frame_ct++ >= WCN36XX_AMPDU_START_THRESH) {
		sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_START;
		sta_priv->non_agg_frame_ct = 0;
		ieee80211_start_tx_ba_session(sta, tid, 0);
	}
out_unlock:
	spin_unlock(&sta_priv->ampdu_lock);
}

static void wcn36xx_set_tx_data(struct wcn36xx_tx_bd *bd,
				struct wcn36xx *wcn,
				struct wcn36xx_vif **vif_priv,
				struct wcn36xx_sta *sta_priv,
				struct sk_buff *skb,
				bool bcast)
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
	struct ieee80211_vif *vif = NULL;
	struct wcn36xx_vif *__vif_priv = NULL;
	bool is_data_qos;

	bd->bd_rate = WCN36XX_BD_RATE_DATA;

	/*
	 * For not unicast frames mac80211 will not set sta pointer so use
	 * self_sta_index instead.
	 */
	if (sta_priv) {
		__vif_priv = sta_priv->vif;
		vif = container_of((void *)__vif_priv,
				   struct ieee80211_vif,
				   drv_priv);

		bd->dpu_sign = sta_priv->ucast_dpu_sign;
		if (vif->type == NL80211_IFTYPE_STATION) {
			bd->sta_index = sta_priv->bss_sta_index;
			bd->dpu_desc_idx = sta_priv->bss_dpu_desc_index;
		} else if (vif->type == NL80211_IFTYPE_AP ||
			   vif->type == NL80211_IFTYPE_ADHOC ||
			   vif->type == NL80211_IFTYPE_MESH_POINT) {
			bd->sta_index = sta_priv->sta_index;
			bd->dpu_desc_idx = sta_priv->dpu_desc_index;
		}
	} else {
		__vif_priv = get_vif_by_addr(wcn, hdr->addr2);
		bd->sta_index = __vif_priv->self_sta_index;
		bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
		bd->dpu_sign = __vif_priv->self_ucast_dpu_sign;
	}

	if (ieee80211_is_nullfunc(hdr->frame_control) ||
	   (sta_priv && !sta_priv->is_data_encrypted))
		bd->dpu_ne = 1;

	if (bcast) {
		bd->ub = 1;
		bd->ack_policy = 1;
	}
	*vif_priv = __vif_priv;

	is_data_qos = ieee80211_is_data_qos(hdr->frame_control);

	wcn36xx_set_tx_pdu(bd,
			   is_data_qos ?
			   sizeof(struct ieee80211_qos_hdr) :
			   sizeof(struct ieee80211_hdr_3addr),
			   skb->len, sta_priv ? sta_priv->tid : 0);

	if (sta_priv && is_data_qos)
		wcn36xx_tx_start_ampdu(wcn, sta_priv, skb);
}

static void wcn36xx_set_tx_mgmt(struct wcn36xx_tx_bd *bd,
				struct wcn36xx *wcn,
				struct wcn36xx_vif **vif_priv,
				struct sk_buff *skb,
				bool bcast)
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
	struct wcn36xx_vif *__vif_priv =
		get_vif_by_addr(wcn, hdr->addr2);
	bd->sta_index = __vif_priv->self_sta_index;
	bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
	bd->dpu_ne = 1;

	/* default rate for unicast */
	if (ieee80211_is_mgmt(hdr->frame_control))
		bd->bd_rate = (WCN36XX_BAND(wcn) == NL80211_BAND_5GHZ) ?
			WCN36XX_BD_RATE_CTRL :
			WCN36XX_BD_RATE_MGMT;
	else if (ieee80211_is_ctl(hdr->frame_control))
		bd->bd_rate = WCN36XX_BD_RATE_CTRL;
	else
		wcn36xx_warn("frame control type unknown\n");

	/*
	 * In joining state trick hardware that probe is sent as
	 * unicast even if address is broadcast.
	 */
	if (__vif_priv->is_joining &&
	    ieee80211_is_probe_req(hdr->frame_control))
		bcast = false;

	if (bcast) {
		/* broadcast */
		bd->ub = 1;
		/* No ack needed not unicast */
		bd->ack_policy = 1;
		bd->queue_id = WCN36XX_TX_B_WQ_ID;
	} else
		bd->queue_id = WCN36XX_TX_U_WQ_ID;
	*vif_priv = __vif_priv;

	wcn36xx_set_tx_pdu(bd,
			   ieee80211_is_data_qos(hdr->frame_control) ?
			   sizeof(struct ieee80211_qos_hdr) :
			   sizeof(struct ieee80211_hdr_3addr),
			   skb->len, WCN36XX_TID);
}

int wcn36xx_start_tx(struct wcn36xx *wcn,
		     struct wcn36xx_sta *sta_priv,
		     struct sk_buff *skb)
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
	struct wcn36xx_vif *vif_priv = NULL;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	unsigned long flags;
	bool is_low = ieee80211_is_data(hdr->frame_control);
	bool bcast = is_broadcast_ether_addr(hdr->addr1) ||
		is_multicast_ether_addr(hdr->addr1);
	struct wcn36xx_tx_bd *bd = wcn36xx_dxe_get_next_bd(wcn, is_low);

	if (!bd) {
		/*
		 * TX DXE are used in pairs. One for the BD and one for the
		 * actual frame. The BD DXE's has a preallocated buffer while
		 * the skb ones does not. If this isn't true something is really
		 * wierd. TODO: Recover from this situation
		 */

		wcn36xx_err("bd address may not be NULL for BD DXE\n");
		return -EINVAL;
	}

	memset(bd, 0, sizeof(*bd));

	wcn36xx_dbg(WCN36XX_DBG_TX,
		    "tx skb %p len %d fc %04x sn %d %s %s\n",
		    skb, skb->len, __le16_to_cpu(hdr->frame_control),
		    IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)),
		    is_low ? "low" : "high", bcast ? "bcast" : "ucast");

	wcn36xx_dbg_dump(WCN36XX_DBG_TX_DUMP, "", skb->data, skb->len);

	bd->dpu_rf = WCN36XX_BMU_WQ_TX;

	bd->tx_comp = !!(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS);
	if (bd->tx_comp) {
		wcn36xx_dbg(WCN36XX_DBG_DXE, "TX_ACK status requested\n");
		spin_lock_irqsave(&wcn->dxe_lock, flags);
		if (wcn->tx_ack_skb) {
			spin_unlock_irqrestore(&wcn->dxe_lock, flags);
			wcn36xx_warn("tx_ack_skb already set\n");
			return -EINVAL;
		}

		wcn->tx_ack_skb = skb;
		spin_unlock_irqrestore(&wcn->dxe_lock, flags);

		/* Only one at a time is supported by fw. Stop the TX queues
		 * until the ack status gets back.
		 *
		 * TODO: Add watchdog in case FW does not answer
		 */
		ieee80211_stop_queues(wcn->hw);
	}

	/* Data frames served first*/
	if (is_low)
		wcn36xx_set_tx_data(bd, wcn, &vif_priv, sta_priv, skb, bcast);
	else
		/* MGMT and CTRL frames are handeld here*/
		wcn36xx_set_tx_mgmt(bd, wcn, &vif_priv, skb, bcast);

	buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32));
	bd->tx_bd_sign = 0xbdbdbdbd;

	return wcn36xx_dxe_tx_frame(wcn, vif_priv, skb, is_low);
}
Commit	Line	Data
8e84c258 EK	1	/*
	2	* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
	11	* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
	13	* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
	14	* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16
	17	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	18
	19	#include "txrx.h"
	20
	21	static inline int get_rssi0(struct wcn36xx_rx_bd *bd)
	22	{
	23	return 100 - ((bd->phy_stat0 >> 24) & 0xff);
	24	}
	25
	26	int wcn36xx_rx_skb(struct wcn36xx wcn, struct sk_buff skb)
	27	{
	28	struct ieee80211_rx_status status;
	29	struct ieee80211_hdr *hdr;
	30	struct wcn36xx_rx_bd *bd;
	31	u16 fc, sn;
	32
	33	/*
	34	* All fields must be 0, otherwise it can lead to
	35	* unexpected consequences.
	36	*/
	37	memset(&status, 0, sizeof(status));
	38
	39	bd = (struct wcn36xx_rx_bd *)skb->data;
	40	buff_to_be((u32 )bd, sizeof(bd)/sizeof(u32));
	41	wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP,
	42	"BD <<< ", (char *)bd,
	43	sizeof(struct wcn36xx_rx_bd));
	44
	45	skb_put(skb, bd->pdu.mpdu_header_off + bd->pdu.mpdu_len);
	46	skb_pull(skb, bd->pdu.mpdu_header_off);
	47
	48	status.mactime = 10;
	49	status.freq = WCN36XX_CENTER_FREQ(wcn);
	50	status.band = WCN36XX_BAND(wcn);
	51	status.signal = -get_rssi0(bd);
	52	status.antenna = 1;
	53	status.rate_idx = 1;
	54	status.flag = 0;
	55	status.rx_flags = 0;
	56	status.flag \|= RX_FLAG_IV_STRIPPED \|
	57	RX_FLAG_MMIC_STRIPPED \|
	58	RX_FLAG_DECRYPTED;
	59
f980ebc0	60	wcn36xx_dbg(WCN36XX_DBG_RX, "status.flags=%llx\n", status.flag);
8e84c258 EK	61
	62	memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
	63
	64	hdr = (struct ieee80211_hdr *) skb->data;
	65	fc = __le16_to_cpu(hdr->frame_control);
	66	sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl));
	67
	68	if (ieee80211_is_beacon(hdr->frame_control)) {
	69	wcn36xx_dbg(WCN36XX_DBG_BEACON, "beacon skb %p len %d fc %04x sn %d\n",
	70	skb, skb->len, fc, sn);
	71	wcn36xx_dbg_dump(WCN36XX_DBG_BEACON_DUMP, "SKB <<< ",
	72	(char *)skb->data, skb->len);
	73	} else {
	74	wcn36xx_dbg(WCN36XX_DBG_RX, "rx skb %p len %d fc %04x sn %d\n",
	75	skb, skb->len, fc, sn);
	76	wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, "SKB <<< ",
	77	(char *)skb->data, skb->len);
	78	}
	79
	80	ieee80211_rx_irqsafe(wcn->hw, skb);
	81
	82	return 0;
	83	}
	84
	85	static void wcn36xx_set_tx_pdu(struct wcn36xx_tx_bd *bd,
	86	u32 mpdu_header_len,
	87	u32 len,
	88	u16 tid)
	89	{
	90	bd->pdu.mpdu_header_len = mpdu_header_len;
	91	bd->pdu.mpdu_header_off = sizeof(*bd);
	92	bd->pdu.mpdu_data_off = bd->pdu.mpdu_header_len +
	93	bd->pdu.mpdu_header_off;
	94	bd->pdu.mpdu_len = len;
	95	bd->pdu.tid = tid;
232ddcd8	96	bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_QOS;
8e84c258 EK	97	}
	98
	99	static inline struct wcn36xx_vif get_vif_by_addr(struct wcn36xx wcn,
	100	u8 *addr)
	101	{
	102	struct wcn36xx_vif *vif_priv = NULL;
	103	struct ieee80211_vif *vif = NULL;
	104	list_for_each_entry(vif_priv, &wcn->vif_list, list) {
	105	vif = container_of((void *)vif_priv,
	106	struct ieee80211_vif,
	107	drv_priv);
	108	if (memcmp(vif->addr, addr, ETH_ALEN) == 0)
	109	return vif_priv;
	110	}
	111	wcn36xx_warn("vif %pM not found\n", addr);
	112	return NULL;
	113	}
e26dc173 BC	114
	115	static void wcn36xx_tx_start_ampdu(struct wcn36xx *wcn,
	116	struct wcn36xx_sta *sta_priv,
	117	struct sk_buff *skb)
	118	{
	119	struct ieee80211_hdr hdr = (struct ieee80211_hdr )skb->data;
	120	struct ieee80211_sta *sta;
	121	u8 *qc, tid;
	122
	123	if (!conf_is_ht(&wcn->hw->conf))
	124	return;
	125
	126	sta = wcn36xx_priv_to_sta(sta_priv);
	127
	128	if (WARN_ON(!ieee80211_is_data_qos(hdr->frame_control)))
	129	return;
	130
	131	if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
	132	return;
	133
	134	qc = ieee80211_get_qos_ctl(hdr);
	135	tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
	136
	137	spin_lock(&sta_priv->ampdu_lock);
	138	if (sta_priv->ampdu_state[tid] != WCN36XX_AMPDU_NONE)
	139	goto out_unlock;
	140
	141	if (sta_priv->non_agg_frame_ct++ >= WCN36XX_AMPDU_START_THRESH) {
	142	sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_START;
	143	sta_priv->non_agg_frame_ct = 0;
	144	ieee80211_start_tx_ba_session(sta, tid, 0);
	145	}
	146	out_unlock:
	147	spin_unlock(&sta_priv->ampdu_lock);
	148	}
	149
8e84c258 EK	150	static void wcn36xx_set_tx_data(struct wcn36xx_tx_bd *bd,
	151	struct wcn36xx *wcn,
	152	struct wcn36xx_vif **vif_priv,
	153	struct wcn36xx_sta *sta_priv,
5f3f9285	154	struct sk_buff *skb,
8e84c258 EK	155	bool bcast)
8e84c258 EK	156	{
5f3f9285	157	struct ieee80211_hdr hdr = (struct ieee80211_hdr )skb->data;
8e84c258 EK	158	struct ieee80211_vif *vif = NULL;
8e84c258 EK	159	struct wcn36xx_vif *__vif_priv = NULL;
e26dc173 BC	160	bool is_data_qos;
e26dc173 BC	161
8e84c258 EK	162	bd->bd_rate = WCN36XX_BD_RATE_DATA;
	163
	164	/*
	165	* For not unicast frames mac80211 will not set sta pointer so use
	166	* self_sta_index instead.
	167	*/
	168	if (sta_priv) {
	169	__vif_priv = sta_priv->vif;
	170	vif = container_of((void *)__vif_priv,
	171	struct ieee80211_vif,
	172	drv_priv);
	173
82cad2a0	174	bd->dpu_sign = sta_priv->ucast_dpu_sign;
8e84c258 EK	175	if (vif->type == NL80211_IFTYPE_STATION) {
	176	bd->sta_index = sta_priv->bss_sta_index;
	177	bd->dpu_desc_idx = sta_priv->bss_dpu_desc_index;
	178	} else if (vif->type == NL80211_IFTYPE_AP \|\|
	179	vif->type == NL80211_IFTYPE_ADHOC \|\|
	180	vif->type == NL80211_IFTYPE_MESH_POINT) {
	181	bd->sta_index = sta_priv->sta_index;
	182	bd->dpu_desc_idx = sta_priv->dpu_desc_index;
	183	}
	184	} else {
	185	__vif_priv = get_vif_by_addr(wcn, hdr->addr2);
	186	bd->sta_index = __vif_priv->self_sta_index;
	187	bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
82cad2a0	188	bd->dpu_sign = __vif_priv->self_ucast_dpu_sign;
8e84c258 EK	189	}
8e84c258 EK	190
8e84c258 EK	191	if (ieee80211_is_nullfunc(hdr->frame_control) \|\|
	192	(sta_priv && !sta_priv->is_data_encrypted))
	193	bd->dpu_ne = 1;
	194
	195	if (bcast) {
	196	bd->ub = 1;
	197	bd->ack_policy = 1;
	198	}
	199	*vif_priv = __vif_priv;
5f3f9285	200
e26dc173 BC	201	is_data_qos = ieee80211_is_data_qos(hdr->frame_control);
e26dc173 BC	202
5f3f9285	203	wcn36xx_set_tx_pdu(bd,
e26dc173	204	is_data_qos ?
5f3f9285 BC	205	sizeof(struct ieee80211_qos_hdr) :
	206	sizeof(struct ieee80211_hdr_3addr),
	207	skb->len, sta_priv ? sta_priv->tid : 0);
e26dc173 BC	208
	209	if (sta_priv && is_data_qos)
	210	wcn36xx_tx_start_ampdu(wcn, sta_priv, skb);
8e84c258 EK	211	}
	212
	213	static void wcn36xx_set_tx_mgmt(struct wcn36xx_tx_bd *bd,
	214	struct wcn36xx *wcn,
	215	struct wcn36xx_vif **vif_priv,
5f3f9285	216	struct sk_buff *skb,
8e84c258 EK	217	bool bcast)
8e84c258 EK	218	{
5f3f9285	219	struct ieee80211_hdr hdr = (struct ieee80211_hdr )skb->data;
8e84c258 EK	220	struct wcn36xx_vif *__vif_priv =
	221	get_vif_by_addr(wcn, hdr->addr2);
	222	bd->sta_index = __vif_priv->self_sta_index;
	223	bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
	224	bd->dpu_ne = 1;
	225
	226	/* default rate for unicast */
	227	if (ieee80211_is_mgmt(hdr->frame_control))
57fbcce3	228	bd->bd_rate = (WCN36XX_BAND(wcn) == NL80211_BAND_5GHZ) ?
8e84c258 EK	229	WCN36XX_BD_RATE_CTRL :
	230	WCN36XX_BD_RATE_MGMT;
	231	else if (ieee80211_is_ctl(hdr->frame_control))
	232	bd->bd_rate = WCN36XX_BD_RATE_CTRL;
	233	else
	234	wcn36xx_warn("frame control type unknown\n");
	235
	236	/*
	237	* In joining state trick hardware that probe is sent as
	238	* unicast even if address is broadcast.
	239	*/
	240	if (__vif_priv->is_joining &&
	241	ieee80211_is_probe_req(hdr->frame_control))
	242	bcast = false;
	243
	244	if (bcast) {
	245	/* broadcast */
	246	bd->ub = 1;
	247	/* No ack needed not unicast */
	248	bd->ack_policy = 1;
	249	bd->queue_id = WCN36XX_TX_B_WQ_ID;
	250	} else
	251	bd->queue_id = WCN36XX_TX_U_WQ_ID;
	252	*vif_priv = __vif_priv;
5f3f9285 BC	253
	254	wcn36xx_set_tx_pdu(bd,
	255	ieee80211_is_data_qos(hdr->frame_control) ?
	256	sizeof(struct ieee80211_qos_hdr) :
	257	sizeof(struct ieee80211_hdr_3addr),
	258	skb->len, WCN36XX_TID);
8e84c258 EK	259	}
	260
	261	int wcn36xx_start_tx(struct wcn36xx *wcn,
	262	struct wcn36xx_sta *sta_priv,
	263	struct sk_buff *skb)
	264	{
	265	struct ieee80211_hdr hdr = (struct ieee80211_hdr )skb->data;
	266	struct wcn36xx_vif *vif_priv = NULL;
	267	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	268	unsigned long flags;
	269	bool is_low = ieee80211_is_data(hdr->frame_control);
	270	bool bcast = is_broadcast_ether_addr(hdr->addr1) \|\|
	271	is_multicast_ether_addr(hdr->addr1);
	272	struct wcn36xx_tx_bd *bd = wcn36xx_dxe_get_next_bd(wcn, is_low);
	273
	274	if (!bd) {
	275	/*
	276	* TX DXE are used in pairs. One for the BD and one for the
	277	* actual frame. The BD DXE's has a preallocated buffer while
	278	* the skb ones does not. If this isn't true something is really
	279	* wierd. TODO: Recover from this situation
	280	*/
	281
	282	wcn36xx_err("bd address may not be NULL for BD DXE\n");
	283	return -EINVAL;
	284	}
	285
	286	memset(bd, 0, sizeof(*bd));
	287
	288	wcn36xx_dbg(WCN36XX_DBG_TX,
	289	"tx skb %p len %d fc %04x sn %d %s %s\n",
	290	skb, skb->len, __le16_to_cpu(hdr->frame_control),
	291	IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)),
	292	is_low ? "low" : "high", bcast ? "bcast" : "ucast");
	293
	294	wcn36xx_dbg_dump(WCN36XX_DBG_TX_DUMP, "", skb->data, skb->len);
	295
	296	bd->dpu_rf = WCN36XX_BMU_WQ_TX;
	297
f786a6d4	298	bd->tx_comp = !!(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS);
8e84c258 EK	299	if (bd->tx_comp) {
	300	wcn36xx_dbg(WCN36XX_DBG_DXE, "TX_ACK status requested\n");
	301	spin_lock_irqsave(&wcn->dxe_lock, flags);
	302	if (wcn->tx_ack_skb) {
	303	spin_unlock_irqrestore(&wcn->dxe_lock, flags);
	304	wcn36xx_warn("tx_ack_skb already set\n");
	305	return -EINVAL;
	306	}
	307
	308	wcn->tx_ack_skb = skb;
	309	spin_unlock_irqrestore(&wcn->dxe_lock, flags);
	310
	311	/* Only one at a time is supported by fw. Stop the TX queues
	312	* until the ack status gets back.
	313	*
	314	* TODO: Add watchdog in case FW does not answer
	315	*/
	316	ieee80211_stop_queues(wcn->hw);
	317	}
	318
	319	/* Data frames served first*/
5f3f9285 BC	320	if (is_low)
	321	wcn36xx_set_tx_data(bd, wcn, &vif_priv, sta_priv, skb, bcast);
	322	else
8e84c258	323	/* MGMT and CTRL frames are handeld here*/
5f3f9285	324	wcn36xx_set_tx_mgmt(bd, wcn, &vif_priv, skb, bcast);
8e84c258 EK	325
	326	buff_to_be((u32 )bd, sizeof(bd)/sizeof(u32));
	327	bd->tx_bd_sign = 0xbdbdbdbd;
	328
	329	return wcn36xx_dxe_tx_frame(wcn, vif_priv, skb, is_low);
	330	}