[deliverable/linux.git] / drivers / net / wireless / mwifiex / 11n_aggr.c

/*
 * Marvell Wireless LAN device driver: 802.11n Aggregation
 *
 * Copyright (C) 2011, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 */

#include "decl.h"
#include "ioctl.h"
#include "util.h"
#include "fw.h"
#include "main.h"
#include "wmm.h"
#include "11n.h"
#include "11n_aggr.h"

/*
 * Creates an AMSDU subframe for aggregation into one AMSDU packet.
 *
 * The resultant AMSDU subframe format is -
 *
 * +---- ~ -----+---- ~ ------+---- ~ -----+----- ~ -----+---- ~ -----+
 * |     DA     |     SA      |   Length   | SNAP header |   MSDU     |
 * | data[0..5] | data[6..11] |            |             | data[14..] |
 * +---- ~ -----+---- ~ ------+---- ~ -----+----- ~ -----+---- ~ -----+
 * <--6-bytes--> <--6-bytes--> <--2-bytes--><--8-bytes--> <--n-bytes-->
 *
 * This function also computes the amount of padding required to make the
 * buffer length multiple of 4 bytes.
 *
 * Data => |DA|SA|SNAP-TYPE|........    .|
 * MSDU => |DA|SA|Length|SNAP|......   ..|
 */
static int
mwifiex_11n_form_amsdu_pkt(struct sk_buff *skb_aggr,
			   struct sk_buff *skb_src, int *pad)

{
	int dt_offset;
	struct rfc_1042_hdr snap = {
		0xaa,		/* LLC DSAP */
		0xaa,		/* LLC SSAP */
		0x03,		/* LLC CTRL */
		{0x00, 0x00, 0x00},	/* SNAP OUI */
		0x0000		/* SNAP type */
			/*
			 * This field will be overwritten
			 * later with ethertype
			 */
	};
	struct tx_packet_hdr *tx_header;

	tx_header = (void *)skb_put(skb_aggr, sizeof(*tx_header));

	/* Copy DA and SA */
	dt_offset = 2 * ETH_ALEN;
	memcpy(&tx_header->eth803_hdr, skb_src->data, dt_offset);

	/* Copy SNAP header */
	snap.snap_type = *(u16 *) ((u8 *)skb_src->data + dt_offset);
	dt_offset += sizeof(u16);

	memcpy(&tx_header->rfc1042_hdr, &snap, sizeof(struct rfc_1042_hdr));

	skb_pull(skb_src, dt_offset);

	/* Update Length field */
	tx_header->eth803_hdr.h_proto = htons(skb_src->len + LLC_SNAP_LEN);

	/* Add payload */
	memcpy(skb_put(skb_aggr, skb_src->len), skb_src->data, skb_src->len);

	/* Add padding for new MSDU to start from 4 byte boundary */
	*pad = (4 - ((unsigned long)skb_aggr->tail & 0x3)) % 4;

	return skb_aggr->len + *pad;
}

/*
 * Adds TxPD to AMSDU header.
 *
 * Each AMSDU packet will contain one TxPD at the beginning,
 * followed by multiple AMSDU subframes.
 */
static void
mwifiex_11n_form_amsdu_txpd(struct mwifiex_private *priv,
			    struct sk_buff *skb)
{
	struct txpd *local_tx_pd;

	skb_push(skb, sizeof(*local_tx_pd));

	local_tx_pd = (struct txpd *) skb->data;
	memset(local_tx_pd, 0, sizeof(struct txpd));

	/* Original priority has been overwritten */
	local_tx_pd->priority = (u8) skb->priority;
	local_tx_pd->pkt_delay_2ms =
		mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
	local_tx_pd->bss_num = priv->bss_num;
	local_tx_pd->bss_type = priv->bss_type;
	/* Always zero as the data is followed by struct txpd */
	local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
	local_tx_pd->tx_pkt_type = cpu_to_le16(PKT_TYPE_AMSDU);
	local_tx_pd->tx_pkt_length = cpu_to_le16(skb->len -
						 sizeof(*local_tx_pd));

	if (local_tx_pd->tx_control == 0)
		/* TxCtrl set by user or default */
		local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);

	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
	    priv->adapter->pps_uapsd_mode) {
		if (true == mwifiex_check_last_packet_indication(priv)) {
			priv->adapter->tx_lock_flag = true;
			local_tx_pd->flags =
				MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET;
		}
	}
}

/*
 * Create aggregated packet.
 *
 * This function creates an aggregated MSDU packet, by combining buffers
 * from the RA list. Each individual buffer is encapsulated as an AMSDU
 * subframe and all such subframes are concatenated together to form the
 * AMSDU packet.
 *
 * A TxPD is also added to the front of the resultant AMSDU packets for
 * transmission. The resultant packets format is -
 *
 * +---- ~ ----+------ ~ ------+------ ~ ------+-..-+------ ~ ------+
 * |    TxPD   |AMSDU sub-frame|AMSDU sub-frame| .. |AMSDU sub-frame|
 * |           |       1       |       2       | .. |       n       |
 * +---- ~ ----+------ ~ ------+------ ~ ------+ .. +------ ~ ------+
 */
int
mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv,
			  struct mwifiex_ra_list_tbl *pra_list, int headroom,
			  int ptrindex, unsigned long ra_list_flags)
			  __releases(&priv->wmm.ra_list_spinlock)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	struct sk_buff *skb_aggr, *skb_src;
	struct mwifiex_txinfo *tx_info_aggr, *tx_info_src;
	int pad = 0, ret;
	struct mwifiex_tx_param tx_param;
	struct txpd *ptx_pd = NULL;

	skb_src = skb_peek(&pra_list->skb_head);
	if (!skb_src) {
		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
				       ra_list_flags);
		return 0;
	}

	tx_info_src = MWIFIEX_SKB_TXCB(skb_src);
	skb_aggr = dev_alloc_skb(adapter->tx_buf_size);
	if (!skb_aggr) {
		dev_err(adapter->dev, "%s: alloc skb_aggr\n", __func__);
		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
				       ra_list_flags);
		return -1;
	}
	skb_reserve(skb_aggr, headroom + sizeof(struct txpd));
	tx_info_aggr =  MWIFIEX_SKB_TXCB(skb_aggr);

	tx_info_aggr->bss_type = tx_info_src->bss_type;
	tx_info_aggr->bss_num = tx_info_src->bss_num;
	skb_aggr->priority = skb_src->priority;

	do {
		/* Check if AMSDU can accommodate this MSDU */
		if (skb_tailroom(skb_aggr) < (skb_src->len + LLC_SNAP_LEN))
			break;

		skb_src = skb_dequeue(&pra_list->skb_head);

		pra_list->total_pkts_size -= skb_src->len;

		atomic_dec(&priv->wmm.tx_pkts_queued);

		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
				       ra_list_flags);
		mwifiex_11n_form_amsdu_pkt(skb_aggr, skb_src, &pad);

		mwifiex_write_data_complete(adapter, skb_src, 0, 0);

		spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);

		if (!mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) {
			spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
					       ra_list_flags);
			return -1;
		}

		if (skb_tailroom(skb_aggr) < pad) {
			pad = 0;
			break;
		}
		skb_put(skb_aggr, pad);

		skb_src = skb_peek(&pra_list->skb_head);

	} while (skb_src);

	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);

	/* Last AMSDU packet does not need padding */
	skb_trim(skb_aggr, skb_aggr->len - pad);

	/* Form AMSDU */
	mwifiex_11n_form_amsdu_txpd(priv, skb_aggr);
	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
		ptx_pd = (struct txpd *)skb_aggr->data;

	skb_push(skb_aggr, headroom);

	if (adapter->iface_type == MWIFIEX_USB) {
		adapter->data_sent = true;
		ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA,
						   skb_aggr, NULL);
	} else {
		/*
		 * Padding per MSDU will affect the length of next
		 * packet and hence the exact length of next packet
		 * is uncertain here.
		 *
		 * Also, aggregation of transmission buffer, while
		 * downloading the data to the card, wont gain much
		 * on the AMSDU packets as the AMSDU packets utilizes
		 * the transmission buffer space to the maximum
		 * (adapter->tx_buf_size).
		 */
		tx_param.next_pkt_len = 0;

		ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
						   skb_aggr, &tx_param);
	}
	switch (ret) {
	case -EBUSY:
		spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
		if (!mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) {
			spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
					       ra_list_flags);
			mwifiex_write_data_complete(adapter, skb_aggr, 1, -1);
			return -1;
		}
		if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
		    adapter->pps_uapsd_mode && adapter->tx_lock_flag) {
				priv->adapter->tx_lock_flag = false;
				if (ptx_pd)
					ptx_pd->flags = 0;
		}

		skb_queue_tail(&pra_list->skb_head, skb_aggr);

		pra_list->total_pkts_size += skb_aggr->len;

		atomic_inc(&priv->wmm.tx_pkts_queued);

		tx_info_aggr->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
				       ra_list_flags);
		dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
		break;
	case -1:
		adapter->data_sent = false;
		dev_err(adapter->dev, "%s: host_to_card failed: %#x\n",
			__func__, ret);
		adapter->dbg.num_tx_host_to_card_failure++;
		mwifiex_write_data_complete(adapter, skb_aggr, 1, ret);
		return 0;
	case -EINPROGRESS:
		adapter->data_sent = false;
		break;
	case 0:
		mwifiex_write_data_complete(adapter, skb_aggr, 1, ret);
		break;
	default:
		break;
	}
	if (ret != -EBUSY) {
		spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
		if (mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) {
			priv->wmm.packets_out[ptrindex]++;
			priv->wmm.tid_tbl_ptr[ptrindex].ra_list_curr = pra_list;
		}
		/* Now bss_prio_cur pointer points to next node */
		adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
			list_first_entry(
				&adapter->bss_prio_tbl[priv->bss_priority]
				.bss_prio_cur->list,
				struct mwifiex_bss_prio_node, list);
		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
				       ra_list_flags);
	}

	return 0;
}
Commit	Line	Data
5e6e3a92 BZ	1	/*
	2	* Marvell Wireless LAN device driver: 802.11n Aggregation
	3	*
	4	* Copyright (C) 2011, Marvell International Ltd.
	5	*
	6	* This software file (the "File") is distributed by Marvell International
	7	* Ltd. under the terms of the GNU General Public License Version 2, June 1991
	8	* (the "License"). You may use, redistribute and/or modify this File in
	9	* accordance with the terms and conditions of the License, a copy of which
	10	* is available by writing to the Free Software Foundation, Inc.,
	11	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
	12	* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
	13	*
	14	* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
	15	* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
	16	* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
	17	* this warranty disclaimer.
	18	*/
	19
	20	#include "decl.h"
	21	#include "ioctl.h"
	22	#include "util.h"
	23	#include "fw.h"
	24	#include "main.h"
	25	#include "wmm.h"
	26	#include "11n.h"
	27	#include "11n_aggr.h"
	28
	29	/*
	30	* Creates an AMSDU subframe for aggregation into one AMSDU packet.
	31	*
	32	* The resultant AMSDU subframe format is -
	33	*
	34	* +---- ~ -----+---- ~ ------+---- ~ -----+----- ~ -----+---- ~ -----+
	35	* \| DA \| SA \| Length \| SNAP header \| MSDU \|
	36	* \| data[0..5] \| data[6..11] \| \| \| data[14..] \|
	37	* +---- ~ -----+---- ~ ------+---- ~ -----+----- ~ -----+---- ~ -----+
	38	* <--6-bytes--> <--6-bytes--> <--2-bytes--><--8-bytes--> <--n-bytes-->
	39	*
	40	* This function also computes the amount of padding required to make the
	41	* buffer length multiple of 4 bytes.
	42	*
	43	* Data => \|DA\|SA\|SNAP-TYPE\|........ .\|
	44	* MSDU => \|DA\|SA\|Length\|SNAP\|...... ..\|
	45	*/
	46	static int
572e8f3e	47	mwifiex_11n_form_amsdu_pkt(struct sk_buff *skb_aggr,
5e6e3a92 BZ	48	struct sk_buff skb_src, int pad)
	49
	50	{
	51	int dt_offset;
	52	struct rfc_1042_hdr snap = {
	53	0xaa, /* LLC DSAP */
	54	0xaa, /* LLC SSAP */
	55	0x03, /* LLC CTRL */
	56	{0x00, 0x00, 0x00}, /* SNAP OUI */
	57	0x0000 /* SNAP type */
	58	/*
	59	* This field will be overwritten
	60	* later with ethertype
	61	*/
	62	};
270e58e8	63	struct tx_packet_hdr *tx_header;
5e6e3a92	64
d92a6803	65	tx_header = (void )skb_put(skb_aggr, sizeof(tx_header));
5e6e3a92 BZ	66
	67	/* Copy DA and SA */
	68	dt_offset = 2 * ETH_ALEN;
	69	memcpy(&tx_header->eth803_hdr, skb_src->data, dt_offset);
	70
	71	/* Copy SNAP header */
	72	snap.snap_type = (u16 ) ((u8 *)skb_src->data + dt_offset);
	73	dt_offset += sizeof(u16);
	74
	75	memcpy(&tx_header->rfc1042_hdr, &snap, sizeof(struct rfc_1042_hdr));
	76
	77	skb_pull(skb_src, dt_offset);
	78
	79	/* Update Length field */
	80	tx_header->eth803_hdr.h_proto = htons(skb_src->len + LLC_SNAP_LEN);
	81
	82	/* Add payload */
d92a6803 YAP	83	memcpy(skb_put(skb_aggr, skb_src->len), skb_src->data, skb_src->len);
d92a6803 YAP	84
bda1b1b7 YAP	85	/* Add padding for new MSDU to start from 4 byte boundary */
bda1b1b7 YAP	86	*pad = (4 - ((unsigned long)skb_aggr->tail & 0x3)) % 4;
5e6e3a92 BZ	87
	88	return skb_aggr->len + *pad;
	89	}
	90
	91	/*
	92	* Adds TxPD to AMSDU header.
	93	*
	94	* Each AMSDU packet will contain one TxPD at the beginning,
	95	* followed by multiple AMSDU subframes.
	96	*/
	97	static void
	98	mwifiex_11n_form_amsdu_txpd(struct mwifiex_private *priv,
	99	struct sk_buff *skb)
	100	{
	101	struct txpd *local_tx_pd;
	102
	103	skb_push(skb, sizeof(*local_tx_pd));
	104
	105	local_tx_pd = (struct txpd *) skb->data;
	106	memset(local_tx_pd, 0, sizeof(struct txpd));
	107
	108	/* Original priority has been overwritten */
	109	local_tx_pd->priority = (u8) skb->priority;
	110	local_tx_pd->pkt_delay_2ms =
	111	mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
	112	local_tx_pd->bss_num = priv->bss_num;
	113	local_tx_pd->bss_type = priv->bss_type;
	114	/* Always zero as the data is followed by struct txpd */
	115	local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
	116	local_tx_pd->tx_pkt_type = cpu_to_le16(PKT_TYPE_AMSDU);
	117	local_tx_pd->tx_pkt_length = cpu_to_le16(skb->len -
84266841	118	sizeof(*local_tx_pd));
5e6e3a92 BZ	119
	120	if (local_tx_pd->tx_control == 0)
	121	/* TxCtrl set by user or default */
	122	local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
	123
84266841 YAP	124	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
84266841 YAP	125	priv->adapter->pps_uapsd_mode) {
5e6e3a92 BZ	126	if (true == mwifiex_check_last_packet_indication(priv)) {
	127	priv->adapter->tx_lock_flag = true;
	128	local_tx_pd->flags =
	129	MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET;
	130	}
	131	}
	132	}
	133
5e6e3a92 BZ	134	/*
	135	* Create aggregated packet.
	136	*
	137	* This function creates an aggregated MSDU packet, by combining buffers
	138	* from the RA list. Each individual buffer is encapsulated as an AMSDU
	139	* subframe and all such subframes are concatenated together to form the
	140	* AMSDU packet.
	141	*
	142	* A TxPD is also added to the front of the resultant AMSDU packets for
	143	* transmission. The resultant packets format is -
	144	*
	145	* +---- ~ ----+------ ~ ------+------ ~ ------+-..-+------ ~ ------+
	146	* \| TxPD \|AMSDU sub-frame\|AMSDU sub-frame\| .. \|AMSDU sub-frame\|
	147	* \| \| 1 \| 2 \| .. \| n \|
	148	* +---- ~ ----+------ ~ ------+------ ~ ------+ .. +------ ~ ------+
	149	*/
	150	int
	151	mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv,
	152	struct mwifiex_ra_list_tbl *pra_list, int headroom,
	153	int ptrindex, unsigned long ra_list_flags)
	154	__releases(&priv->wmm.ra_list_spinlock)
	155	{
	156	struct mwifiex_adapter *adapter = priv->adapter;
	157	struct sk_buff skb_aggr, skb_src;
	158	struct mwifiex_txinfo tx_info_aggr, tx_info_src;
270e58e8	159	int pad = 0, ret;
5e6e3a92 BZ	160	struct mwifiex_tx_param tx_param;
	161	struct txpd *ptx_pd = NULL;
	162
a8fe3293 YAP	163	skb_src = skb_peek(&pra_list->skb_head);
a8fe3293 YAP	164	if (!skb_src) {
5e6e3a92 BZ	165	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
	166	ra_list_flags);
	167	return 0;
	168	}
a8fe3293	169
5e6e3a92 BZ	170	tx_info_src = MWIFIEX_SKB_TXCB(skb_src);
	171	skb_aggr = dev_alloc_skb(adapter->tx_buf_size);
	172	if (!skb_aggr) {
	173	dev_err(adapter->dev, "%s: alloc skb_aggr\n", __func__);
	174	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
	175	ra_list_flags);
	176	return -1;
	177	}
	178	skb_reserve(skb_aggr, headroom + sizeof(struct txpd));
	179	tx_info_aggr = MWIFIEX_SKB_TXCB(skb_aggr);
	180
9da9a3b2 YAP	181	tx_info_aggr->bss_type = tx_info_src->bss_type;
9da9a3b2 YAP	182	tx_info_aggr->bss_num = tx_info_src->bss_num;
5e6e3a92 BZ	183	skb_aggr->priority = skb_src->priority;
5e6e3a92 BZ	184
fb3c19bc YAP	185	do {
	186	/* Check if AMSDU can accommodate this MSDU */
	187	if (skb_tailroom(skb_aggr) < (skb_src->len + LLC_SNAP_LEN))
	188	break;
5e6e3a92	189
a8fe3293	190	skb_src = skb_dequeue(&pra_list->skb_head);
5e6e3a92	191
fb3c19bc	192	pra_list->total_pkts_size -= skb_src->len;
5e6e3a92	193
f699254c MY	194	atomic_dec(&priv->wmm.tx_pkts_queued);
f699254c MY	195
5e6e3a92 BZ	196	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
5e6e3a92 BZ	197	ra_list_flags);
572e8f3e	198	mwifiex_11n_form_amsdu_pkt(skb_aggr, skb_src, &pad);
5e6e3a92	199
47411a06	200	mwifiex_write_data_complete(adapter, skb_src, 0, 0);
5e6e3a92 BZ	201
	202	spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
	203
	204	if (!mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) {
	205	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
	206	ra_list_flags);
	207	return -1;
	208	}
	209
fb3c19bc YAP	210	if (skb_tailroom(skb_aggr) < pad) {
	211	pad = 0;
	212	break;
	213	}
	214	skb_put(skb_aggr, pad);
	215
a8fe3293	216	skb_src = skb_peek(&pra_list->skb_head);
fb3c19bc YAP	217
fb3c19bc YAP	218	} while (skb_src);
5e6e3a92 BZ	219
	220	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
	221
	222	/* Last AMSDU packet does not need padding */
	223	skb_trim(skb_aggr, skb_aggr->len - pad);
	224
	225	/* Form AMSDU */
	226	mwifiex_11n_form_amsdu_txpd(priv, skb_aggr);
	227	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
	228	ptx_pd = (struct txpd *)skb_aggr->data;
	229
	230	skb_push(skb_aggr, headroom);
	231
4daffe35 AK	232	if (adapter->iface_type == MWIFIEX_USB) {
	233	adapter->data_sent = true;
	234	ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA,
	235	skb_aggr, NULL);
	236	} else {
	237	/*
	238	* Padding per MSDU will affect the length of next
	239	* packet and hence the exact length of next packet
	240	* is uncertain here.
	241	*
	242	* Also, aggregation of transmission buffer, while
	243	* downloading the data to the card, wont gain much
	244	* on the AMSDU packets as the AMSDU packets utilizes
	245	* the transmission buffer space to the maximum
	246	* (adapter->tx_buf_size).
	247	*/
	248	tx_param.next_pkt_len = 0;
	249
	250	ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
	251	skb_aggr, &tx_param);
	252	}
5e6e3a92 BZ	253	switch (ret) {
	254	case -EBUSY:
	255	spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
	256	if (!mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) {
	257	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
	258	ra_list_flags);
47411a06	259	mwifiex_write_data_complete(adapter, skb_aggr, 1, -1);
5e6e3a92 BZ	260	return -1;
5e6e3a92 BZ	261	}
84266841 YAP	262	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
84266841 YAP	263	adapter->pps_uapsd_mode && adapter->tx_lock_flag) {
5e6e3a92	264	priv->adapter->tx_lock_flag = false;
b53575ec CF	265	if (ptx_pd)
b53575ec CF	266	ptx_pd->flags = 0;
5e6e3a92 BZ	267	}
	268
	269	skb_queue_tail(&pra_list->skb_head, skb_aggr);
	270
	271	pra_list->total_pkts_size += skb_aggr->len;
	272
f699254c MY	273	atomic_inc(&priv->wmm.tx_pkts_queued);
f699254c MY	274
5e6e3a92 BZ	275	tx_info_aggr->flags \|= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
	276	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
	277	ra_list_flags);
	278	dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
	279	break;
	280	case -1:
	281	adapter->data_sent = false;
	282	dev_err(adapter->dev, "%s: host_to_card failed: %#x\n",
84266841	283	__func__, ret);
5e6e3a92	284	adapter->dbg.num_tx_host_to_card_failure++;
47411a06	285	mwifiex_write_data_complete(adapter, skb_aggr, 1, ret);
5e6e3a92 BZ	286	return 0;
	287	case -EINPROGRESS:
	288	adapter->data_sent = false;
	289	break;
	290	case 0:
47411a06	291	mwifiex_write_data_complete(adapter, skb_aggr, 1, ret);
5e6e3a92 BZ	292	break;
	293	default:
	294	break;
	295	}
	296	if (ret != -EBUSY) {
	297	spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
	298	if (mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) {
	299	priv->wmm.packets_out[ptrindex]++;
	300	priv->wmm.tid_tbl_ptr[ptrindex].ra_list_curr = pra_list;
	301	}
	302	/* Now bss_prio_cur pointer points to next node */
	303	adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
	304	list_first_entry(
	305	&adapter->bss_prio_tbl[priv->bss_priority]
	306	.bss_prio_cur->list,
	307	struct mwifiex_bss_prio_node, list);
	308	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
	309	ra_list_flags);
	310	}
	311
	312	return 0;
	313	}