[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;

	skb_put(skb_aggr, sizeof(*tx_header));

	tx_header = (struct tx_packet_hdr *) skb_aggr->data;

	/* 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 */
	skb_put(skb_aggr, skb_src->len);
	memcpy(skb_aggr->data + sizeof(*tx_header), skb_src->data,
	       skb_src->len);
	*pad = (((skb_src->len + LLC_SNAP_LEN) & 3)) ? (4 - (((skb_src->len +
						      LLC_SNAP_LEN)) & 3)) : 0;
	skb_put(skb_aggr, *pad);

	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);

		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);
			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, ret);
		return 0;
	case -EINPROGRESS:
		adapter->data_sent = false;
		break;
	case 0:
		mwifiex_write_data_complete(adapter, skb_aggr, 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 BZ	64
	65	skb_put(skb_aggr, sizeof(*tx_header));
	66
	67	tx_header = (struct tx_packet_hdr *) skb_aggr->data;
	68
	69	/* Copy DA and SA */
	70	dt_offset = 2 * ETH_ALEN;
	71	memcpy(&tx_header->eth803_hdr, skb_src->data, dt_offset);
	72
	73	/* Copy SNAP header */
	74	snap.snap_type = (u16 ) ((u8 *)skb_src->data + dt_offset);
	75	dt_offset += sizeof(u16);
	76
	77	memcpy(&tx_header->rfc1042_hdr, &snap, sizeof(struct rfc_1042_hdr));
	78
	79	skb_pull(skb_src, dt_offset);
	80
	81	/* Update Length field */
	82	tx_header->eth803_hdr.h_proto = htons(skb_src->len + LLC_SNAP_LEN);
	83
	84	/* Add payload */
	85	skb_put(skb_aggr, skb_src->len);
	86	memcpy(skb_aggr->data + sizeof(*tx_header), skb_src->data,
84266841	87	skb_src->len);
5e6e3a92 BZ	88	*pad = (((skb_src->len + LLC_SNAP_LEN) & 3)) ? (4 - (((skb_src->len +
	89	LLC_SNAP_LEN)) & 3)) : 0;
	90	skb_put(skb_aggr, *pad);
	91
	92	return skb_aggr->len + *pad;
	93	}
	94
	95	/*
	96	* Adds TxPD to AMSDU header.
	97	*
	98	* Each AMSDU packet will contain one TxPD at the beginning,
	99	* followed by multiple AMSDU subframes.
	100	*/
	101	static void
	102	mwifiex_11n_form_amsdu_txpd(struct mwifiex_private *priv,
	103	struct sk_buff *skb)
	104	{
	105	struct txpd *local_tx_pd;
	106
	107	skb_push(skb, sizeof(*local_tx_pd));
	108
	109	local_tx_pd = (struct txpd *) skb->data;
	110	memset(local_tx_pd, 0, sizeof(struct txpd));
	111
	112	/* Original priority has been overwritten */
	113	local_tx_pd->priority = (u8) skb->priority;
	114	local_tx_pd->pkt_delay_2ms =
	115	mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
	116	local_tx_pd->bss_num = priv->bss_num;
	117	local_tx_pd->bss_type = priv->bss_type;
	118	/* Always zero as the data is followed by struct txpd */
	119	local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
	120	local_tx_pd->tx_pkt_type = cpu_to_le16(PKT_TYPE_AMSDU);
	121	local_tx_pd->tx_pkt_length = cpu_to_le16(skb->len -
84266841	122	sizeof(*local_tx_pd));
5e6e3a92 BZ	123
	124	if (local_tx_pd->tx_control == 0)
	125	/* TxCtrl set by user or default */
	126	local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
	127
84266841 YAP	128	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
84266841 YAP	129	priv->adapter->pps_uapsd_mode) {
5e6e3a92 BZ	130	if (true == mwifiex_check_last_packet_indication(priv)) {
	131	priv->adapter->tx_lock_flag = true;
	132	local_tx_pd->flags =
	133	MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET;
	134	}
	135	}
	136	}
	137
5e6e3a92 BZ	138	/*
	139	* Create aggregated packet.
	140	*
	141	* This function creates an aggregated MSDU packet, by combining buffers
	142	* from the RA list. Each individual buffer is encapsulated as an AMSDU
	143	* subframe and all such subframes are concatenated together to form the
	144	* AMSDU packet.
	145	*
	146	* A TxPD is also added to the front of the resultant AMSDU packets for
	147	* transmission. The resultant packets format is -
	148	*
	149	* +---- ~ ----+------ ~ ------+------ ~ ------+-..-+------ ~ ------+
	150	* \| TxPD \|AMSDU sub-frame\|AMSDU sub-frame\| .. \|AMSDU sub-frame\|
	151	* \| \| 1 \| 2 \| .. \| n \|
	152	* +---- ~ ----+------ ~ ------+------ ~ ------+ .. +------ ~ ------+
	153	*/
	154	int
	155	mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv,
	156	struct mwifiex_ra_list_tbl *pra_list, int headroom,
	157	int ptrindex, unsigned long ra_list_flags)
	158	__releases(&priv->wmm.ra_list_spinlock)
	159	{
	160	struct mwifiex_adapter *adapter = priv->adapter;
	161	struct sk_buff skb_aggr, skb_src;
	162	struct mwifiex_txinfo tx_info_aggr, tx_info_src;
270e58e8	163	int pad = 0, ret;
5e6e3a92 BZ	164	struct mwifiex_tx_param tx_param;
	165	struct txpd *ptx_pd = NULL;
	166
a8fe3293 YAP	167	skb_src = skb_peek(&pra_list->skb_head);
a8fe3293 YAP	168	if (!skb_src) {
5e6e3a92 BZ	169	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
	170	ra_list_flags);
	171	return 0;
	172	}
a8fe3293	173
5e6e3a92 BZ	174	tx_info_src = MWIFIEX_SKB_TXCB(skb_src);
	175	skb_aggr = dev_alloc_skb(adapter->tx_buf_size);
	176	if (!skb_aggr) {
	177	dev_err(adapter->dev, "%s: alloc skb_aggr\n", __func__);
	178	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
	179	ra_list_flags);
	180	return -1;
	181	}
	182	skb_reserve(skb_aggr, headroom + sizeof(struct txpd));
	183	tx_info_aggr = MWIFIEX_SKB_TXCB(skb_aggr);
	184
9da9a3b2 YAP	185	tx_info_aggr->bss_type = tx_info_src->bss_type;
9da9a3b2 YAP	186	tx_info_aggr->bss_num = tx_info_src->bss_num;
5e6e3a92 BZ	187	skb_aggr->priority = skb_src->priority;
5e6e3a92 BZ	188
fb3c19bc YAP	189	do {
	190	/* Check if AMSDU can accommodate this MSDU */
	191	if (skb_tailroom(skb_aggr) < (skb_src->len + LLC_SNAP_LEN))
	192	break;
5e6e3a92	193
a8fe3293	194	skb_src = skb_dequeue(&pra_list->skb_head);
5e6e3a92	195
fb3c19bc	196	pra_list->total_pkts_size -= skb_src->len;
5e6e3a92	197
f699254c MY	198	atomic_dec(&priv->wmm.tx_pkts_queued);
f699254c MY	199
5e6e3a92 BZ	200	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
5e6e3a92 BZ	201	ra_list_flags);
572e8f3e	202	mwifiex_11n_form_amsdu_pkt(skb_aggr, skb_src, &pad);
5e6e3a92 BZ	203
	204	mwifiex_write_data_complete(adapter, skb_src, 0);
	205
	206	spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
	207
	208	if (!mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) {
	209	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
	210	ra_list_flags);
	211	return -1;
	212	}
	213
fb3c19bc YAP	214	if (skb_tailroom(skb_aggr) < pad) {
	215	pad = 0;
	216	break;
	217	}
	218	skb_put(skb_aggr, pad);
	219
a8fe3293	220	skb_src = skb_peek(&pra_list->skb_head);
fb3c19bc YAP	221
fb3c19bc YAP	222	} while (skb_src);
5e6e3a92 BZ	223
	224	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
	225
	226	/* Last AMSDU packet does not need padding */
	227	skb_trim(skb_aggr, skb_aggr->len - pad);
	228
	229	/* Form AMSDU */
	230	mwifiex_11n_form_amsdu_txpd(priv, skb_aggr);
	231	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA)
	232	ptx_pd = (struct txpd *)skb_aggr->data;
	233
	234	skb_push(skb_aggr, headroom);
	235
4daffe35 AK	236	if (adapter->iface_type == MWIFIEX_USB) {
	237	adapter->data_sent = true;
	238	ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA,
	239	skb_aggr, NULL);
	240	} else {
	241	/*
	242	* Padding per MSDU will affect the length of next
	243	* packet and hence the exact length of next packet
	244	* is uncertain here.
	245	*
	246	* Also, aggregation of transmission buffer, while
	247	* downloading the data to the card, wont gain much
	248	* on the AMSDU packets as the AMSDU packets utilizes
	249	* the transmission buffer space to the maximum
	250	* (adapter->tx_buf_size).
	251	*/
	252	tx_param.next_pkt_len = 0;
	253
	254	ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
	255	skb_aggr, &tx_param);
	256	}
5e6e3a92 BZ	257	switch (ret) {
	258	case -EBUSY:
	259	spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
	260	if (!mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) {
	261	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
	262	ra_list_flags);
	263	mwifiex_write_data_complete(adapter, skb_aggr, -1);
	264	return -1;
	265	}
84266841 YAP	266	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
84266841 YAP	267	adapter->pps_uapsd_mode && adapter->tx_lock_flag) {
5e6e3a92	268	priv->adapter->tx_lock_flag = false;
b53575ec CF	269	if (ptx_pd)
b53575ec CF	270	ptx_pd->flags = 0;
5e6e3a92 BZ	271	}
	272
	273	skb_queue_tail(&pra_list->skb_head, skb_aggr);
	274
	275	pra_list->total_pkts_size += skb_aggr->len;
	276
f699254c MY	277	atomic_inc(&priv->wmm.tx_pkts_queued);
f699254c MY	278
5e6e3a92 BZ	279	tx_info_aggr->flags \|= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
	280	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
	281	ra_list_flags);
	282	dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
	283	break;
	284	case -1:
	285	adapter->data_sent = false;
	286	dev_err(adapter->dev, "%s: host_to_card failed: %#x\n",
84266841	287	__func__, ret);
5e6e3a92 BZ	288	adapter->dbg.num_tx_host_to_card_failure++;
	289	mwifiex_write_data_complete(adapter, skb_aggr, ret);
	290	return 0;
	291	case -EINPROGRESS:
	292	adapter->data_sent = false;
	293	break;
	294	case 0:
	295	mwifiex_write_data_complete(adapter, skb_aggr, ret);
	296	break;
	297	default:
	298	break;
	299	}
	300	if (ret != -EBUSY) {
	301	spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
	302	if (mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) {
	303	priv->wmm.packets_out[ptrindex]++;
	304	priv->wmm.tid_tbl_ptr[ptrindex].ra_list_curr = pra_list;
	305	}
	306	/* Now bss_prio_cur pointer points to next node */
	307	adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
	308	list_first_entry(
	309	&adapter->bss_prio_tbl[priv->bss_priority]
	310	.bss_prio_cur->list,
	311	struct mwifiex_bss_prio_node, list);
	312	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
	313	ra_list_flags);
	314	}
	315
	316	return 0;
	317	}