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306 lines
8.9 KiB
306 lines
8.9 KiB
/* |
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* NXP Wireless LAN device driver: 802.11n Aggregation |
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* |
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* Copyright 2011-2020 NXP |
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* |
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* This software file (the "File") is distributed by NXP |
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* under the terms of the GNU General Public License Version 2, June 1991 |
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* (the "License"). You may use, redistribute and/or modify this File in |
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* accordance with the terms and conditions of the License, a copy of which |
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* is available by writing to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the |
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* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. |
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* |
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* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE |
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* ARE EXPRESSLY DISCLAIMED. The License provides additional details about |
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* this warranty disclaimer. |
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*/ |
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#include "decl.h" |
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#include "ioctl.h" |
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#include "util.h" |
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#include "fw.h" |
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#include "main.h" |
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#include "wmm.h" |
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#include "11n.h" |
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#include "11n_aggr.h" |
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/* |
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* Creates an AMSDU subframe for aggregation into one AMSDU packet. |
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* |
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* The resultant AMSDU subframe format is - |
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* |
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* +---- ~ -----+---- ~ ------+---- ~ -----+----- ~ -----+---- ~ -----+ |
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* | DA | SA | Length | SNAP header | MSDU | |
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* | data[0..5] | data[6..11] | | | data[14..] | |
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* +---- ~ -----+---- ~ ------+---- ~ -----+----- ~ -----+---- ~ -----+ |
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* <--6-bytes--> <--6-bytes--> <--2-bytes--><--8-bytes--> <--n-bytes--> |
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* |
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* This function also computes the amount of padding required to make the |
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* buffer length multiple of 4 bytes. |
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* |
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* Data => |DA|SA|SNAP-TYPE|........ .| |
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* MSDU => |DA|SA|Length|SNAP|...... ..| |
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*/ |
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static int |
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mwifiex_11n_form_amsdu_pkt(struct sk_buff *skb_aggr, |
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struct sk_buff *skb_src, int *pad) |
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{ |
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int dt_offset; |
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struct rfc_1042_hdr snap = { |
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0xaa, /* LLC DSAP */ |
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0xaa, /* LLC SSAP */ |
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0x03, /* LLC CTRL */ |
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{0x00, 0x00, 0x00}, /* SNAP OUI */ |
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0x0000 /* SNAP type */ |
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/* |
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* This field will be overwritten |
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* later with ethertype |
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*/ |
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}; |
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struct tx_packet_hdr *tx_header; |
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tx_header = skb_put(skb_aggr, sizeof(*tx_header)); |
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/* Copy DA and SA */ |
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dt_offset = 2 * ETH_ALEN; |
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memcpy(&tx_header->eth803_hdr, skb_src->data, dt_offset); |
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/* Copy SNAP header */ |
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snap.snap_type = ((struct ethhdr *)skb_src->data)->h_proto; |
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dt_offset += sizeof(__be16); |
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memcpy(&tx_header->rfc1042_hdr, &snap, sizeof(struct rfc_1042_hdr)); |
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skb_pull(skb_src, dt_offset); |
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/* Update Length field */ |
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tx_header->eth803_hdr.h_proto = htons(skb_src->len + LLC_SNAP_LEN); |
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/* Add payload */ |
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skb_put_data(skb_aggr, skb_src->data, skb_src->len); |
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/* Add padding for new MSDU to start from 4 byte boundary */ |
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*pad = (4 - ((unsigned long)skb_aggr->tail & 0x3)) % 4; |
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return skb_aggr->len + *pad; |
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} |
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/* |
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* Adds TxPD to AMSDU header. |
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* |
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* Each AMSDU packet will contain one TxPD at the beginning, |
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* followed by multiple AMSDU subframes. |
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*/ |
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static void |
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mwifiex_11n_form_amsdu_txpd(struct mwifiex_private *priv, |
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struct sk_buff *skb) |
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{ |
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struct txpd *local_tx_pd; |
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struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb); |
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skb_push(skb, sizeof(*local_tx_pd)); |
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local_tx_pd = (struct txpd *) skb->data; |
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memset(local_tx_pd, 0, sizeof(struct txpd)); |
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/* Original priority has been overwritten */ |
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local_tx_pd->priority = (u8) skb->priority; |
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local_tx_pd->pkt_delay_2ms = |
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mwifiex_wmm_compute_drv_pkt_delay(priv, skb); |
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local_tx_pd->bss_num = priv->bss_num; |
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local_tx_pd->bss_type = priv->bss_type; |
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/* Always zero as the data is followed by struct txpd */ |
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local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd)); |
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local_tx_pd->tx_pkt_type = cpu_to_le16(PKT_TYPE_AMSDU); |
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local_tx_pd->tx_pkt_length = cpu_to_le16(skb->len - |
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sizeof(*local_tx_pd)); |
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if (tx_info->flags & MWIFIEX_BUF_FLAG_TDLS_PKT) |
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local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_TDLS_PACKET; |
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if (local_tx_pd->tx_control == 0) |
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/* TxCtrl set by user or default */ |
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local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl); |
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if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA && |
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priv->adapter->pps_uapsd_mode) { |
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if (true == mwifiex_check_last_packet_indication(priv)) { |
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priv->adapter->tx_lock_flag = true; |
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local_tx_pd->flags = |
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MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET; |
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} |
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} |
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} |
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/* |
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* Create aggregated packet. |
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* |
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* This function creates an aggregated MSDU packet, by combining buffers |
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* from the RA list. Each individual buffer is encapsulated as an AMSDU |
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* subframe and all such subframes are concatenated together to form the |
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* AMSDU packet. |
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* |
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* A TxPD is also added to the front of the resultant AMSDU packets for |
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* transmission. The resultant packets format is - |
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* |
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* +---- ~ ----+------ ~ ------+------ ~ ------+-..-+------ ~ ------+ |
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* | TxPD |AMSDU sub-frame|AMSDU sub-frame| .. |AMSDU sub-frame| |
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* | | 1 | 2 | .. | n | |
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* +---- ~ ----+------ ~ ------+------ ~ ------+ .. +------ ~ ------+ |
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*/ |
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int |
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mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv, |
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struct mwifiex_ra_list_tbl *pra_list, |
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int ptrindex) |
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__releases(&priv->wmm.ra_list_spinlock) |
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{ |
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struct mwifiex_adapter *adapter = priv->adapter; |
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struct sk_buff *skb_aggr, *skb_src; |
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struct mwifiex_txinfo *tx_info_aggr, *tx_info_src; |
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int pad = 0, aggr_num = 0, ret; |
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struct mwifiex_tx_param tx_param; |
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struct txpd *ptx_pd = NULL; |
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int headroom = adapter->intf_hdr_len; |
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skb_src = skb_peek(&pra_list->skb_head); |
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if (!skb_src) { |
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spin_unlock_bh(&priv->wmm.ra_list_spinlock); |
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return 0; |
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} |
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tx_info_src = MWIFIEX_SKB_TXCB(skb_src); |
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skb_aggr = mwifiex_alloc_dma_align_buf(adapter->tx_buf_size, |
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GFP_ATOMIC); |
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if (!skb_aggr) { |
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spin_unlock_bh(&priv->wmm.ra_list_spinlock); |
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return -1; |
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} |
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/* skb_aggr->data already 64 byte align, just reserve bus interface |
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* header and txpd. |
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*/ |
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skb_reserve(skb_aggr, headroom + sizeof(struct txpd)); |
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tx_info_aggr = MWIFIEX_SKB_TXCB(skb_aggr); |
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memset(tx_info_aggr, 0, sizeof(*tx_info_aggr)); |
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tx_info_aggr->bss_type = tx_info_src->bss_type; |
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tx_info_aggr->bss_num = tx_info_src->bss_num; |
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if (tx_info_src->flags & MWIFIEX_BUF_FLAG_TDLS_PKT) |
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tx_info_aggr->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT; |
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tx_info_aggr->flags |= MWIFIEX_BUF_FLAG_AGGR_PKT; |
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skb_aggr->priority = skb_src->priority; |
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skb_aggr->tstamp = skb_src->tstamp; |
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do { |
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/* Check if AMSDU can accommodate this MSDU */ |
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if ((skb_aggr->len + skb_src->len + LLC_SNAP_LEN) > |
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adapter->tx_buf_size) |
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break; |
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skb_src = skb_dequeue(&pra_list->skb_head); |
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pra_list->total_pkt_count--; |
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atomic_dec(&priv->wmm.tx_pkts_queued); |
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aggr_num++; |
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spin_unlock_bh(&priv->wmm.ra_list_spinlock); |
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mwifiex_11n_form_amsdu_pkt(skb_aggr, skb_src, &pad); |
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mwifiex_write_data_complete(adapter, skb_src, 0, 0); |
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spin_lock_bh(&priv->wmm.ra_list_spinlock); |
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if (!mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) { |
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spin_unlock_bh(&priv->wmm.ra_list_spinlock); |
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return -1; |
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} |
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if (skb_tailroom(skb_aggr) < pad) { |
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pad = 0; |
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break; |
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} |
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skb_put(skb_aggr, pad); |
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skb_src = skb_peek(&pra_list->skb_head); |
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} while (skb_src); |
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spin_unlock_bh(&priv->wmm.ra_list_spinlock); |
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/* Last AMSDU packet does not need padding */ |
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skb_trim(skb_aggr, skb_aggr->len - pad); |
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/* Form AMSDU */ |
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mwifiex_11n_form_amsdu_txpd(priv, skb_aggr); |
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if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) |
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ptx_pd = (struct txpd *)skb_aggr->data; |
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skb_push(skb_aggr, headroom); |
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tx_info_aggr->aggr_num = aggr_num * 2; |
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if (adapter->data_sent || adapter->tx_lock_flag) { |
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atomic_add(aggr_num * 2, &adapter->tx_queued); |
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skb_queue_tail(&adapter->tx_data_q, skb_aggr); |
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return 0; |
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} |
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if (skb_src) |
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tx_param.next_pkt_len = skb_src->len + sizeof(struct txpd); |
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else |
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tx_param.next_pkt_len = 0; |
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if (adapter->iface_type == MWIFIEX_USB) { |
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ret = adapter->if_ops.host_to_card(adapter, priv->usb_port, |
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skb_aggr, &tx_param); |
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} else { |
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ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA, |
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skb_aggr, &tx_param); |
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} |
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switch (ret) { |
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case -EBUSY: |
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spin_lock_bh(&priv->wmm.ra_list_spinlock); |
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if (!mwifiex_is_ralist_valid(priv, pra_list, ptrindex)) { |
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spin_unlock_bh(&priv->wmm.ra_list_spinlock); |
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mwifiex_write_data_complete(adapter, skb_aggr, 1, -1); |
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return -1; |
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} |
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if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA && |
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adapter->pps_uapsd_mode && adapter->tx_lock_flag) { |
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priv->adapter->tx_lock_flag = false; |
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if (ptx_pd) |
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ptx_pd->flags = 0; |
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} |
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skb_queue_tail(&pra_list->skb_head, skb_aggr); |
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pra_list->total_pkt_count++; |
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atomic_inc(&priv->wmm.tx_pkts_queued); |
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tx_info_aggr->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT; |
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spin_unlock_bh(&priv->wmm.ra_list_spinlock); |
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mwifiex_dbg(adapter, ERROR, "data: -EBUSY is returned\n"); |
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break; |
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case -1: |
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mwifiex_dbg(adapter, ERROR, "%s: host_to_card failed: %#x\n", |
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__func__, ret); |
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adapter->dbg.num_tx_host_to_card_failure++; |
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mwifiex_write_data_complete(adapter, skb_aggr, 1, ret); |
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return 0; |
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case -EINPROGRESS: |
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break; |
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case 0: |
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mwifiex_write_data_complete(adapter, skb_aggr, 1, ret); |
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break; |
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default: |
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break; |
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} |
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if (ret != -EBUSY) { |
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mwifiex_rotate_priolists(priv, pra_list, ptrindex); |
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} |
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return 0; |
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}
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