1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * NXP Wireless LAN device driver: station TX data handling
4 *
5 * Copyright 2011-2020 NXP
6 */
7
8 #include "decl.h"
9 #include "ioctl.h"
10 #include "util.h"
11 #include "fw.h"
12 #include "main.h"
13 #include "wmm.h"
14
15 /*
16 * This function fills the TxPD for tx packets.
17 *
18 * The Tx buffer received by this function should already have the
19 * header space allocated for TxPD.
20 *
21 * This function inserts the TxPD in between interface header and actual
22 * data and adjusts the buffer pointers accordingly.
23 *
24 * The following TxPD fields are set by this function, as required -
25 * - BSS number
26 * - Tx packet length and offset
27 * - Priority
28 * - Packet delay
29 * - Priority specific Tx control
30 * - Flags
31 */
mwifiex_process_sta_txpd(struct mwifiex_private * priv,struct sk_buff * skb)32 void mwifiex_process_sta_txpd(struct mwifiex_private *priv,
33 struct sk_buff *skb)
34 {
35 struct mwifiex_adapter *adapter = priv->adapter;
36 struct txpd *local_tx_pd;
37 struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
38 unsigned int pad;
39 u16 pkt_type, pkt_offset;
40 int hroom = adapter->intf_hdr_len;
41
42 pkt_type = mwifiex_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0;
43
44 pad = ((uintptr_t)skb->data - (sizeof(*local_tx_pd) + hroom)) &
45 (MWIFIEX_DMA_ALIGN_SZ - 1);
46 skb_push(skb, sizeof(*local_tx_pd) + pad);
47
48 local_tx_pd = (struct txpd *) skb->data;
49 memset(local_tx_pd, 0, sizeof(struct txpd));
50 local_tx_pd->bss_num = priv->bss_num;
51 local_tx_pd->bss_type = priv->bss_type;
52 local_tx_pd->tx_pkt_length = cpu_to_le16((u16)(skb->len -
53 (sizeof(struct txpd) +
54 pad)));
55
56 local_tx_pd->priority = (u8) skb->priority;
57 local_tx_pd->pkt_delay_2ms =
58 mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
59
60 if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS ||
61 tx_info->flags & MWIFIEX_BUF_FLAG_ACTION_TX_STATUS) {
62 local_tx_pd->tx_token_id = tx_info->ack_frame_id;
63 local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_REQ_TX_STATUS;
64 }
65
66 if (local_tx_pd->priority <
67 ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl))
68 /*
69 * Set the priority specific tx_control field, setting of 0 will
70 * cause the default value to be used later in this function
71 */
72 local_tx_pd->tx_control =
73 cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[local_tx_pd->
74 priority]);
75
76 if (adapter->pps_uapsd_mode) {
77 if (mwifiex_check_last_packet_indication(priv)) {
78 adapter->tx_lock_flag = true;
79 local_tx_pd->flags =
80 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET;
81 }
82 }
83
84 if (tx_info->flags & MWIFIEX_BUF_FLAG_TDLS_PKT)
85 local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_TDLS_PACKET;
86
87 /* Offset of actual data */
88 pkt_offset = sizeof(struct txpd) + pad;
89 if (pkt_type == PKT_TYPE_MGMT) {
90 /* Set the packet type and add header for management frame */
91 local_tx_pd->tx_pkt_type = cpu_to_le16(pkt_type);
92 pkt_offset += MWIFIEX_MGMT_FRAME_HEADER_SIZE;
93 }
94
95 local_tx_pd->tx_pkt_offset = cpu_to_le16(pkt_offset);
96
97 /* make space for adapter->intf_hdr_len */
98 skb_push(skb, hroom);
99
100 if (!local_tx_pd->tx_control)
101 /* TxCtrl set by user or default */
102 local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
103 }
104
105 /*
106 * This function tells firmware to send a NULL data packet.
107 *
108 * The function creates a NULL data packet with TxPD and sends to the
109 * firmware for transmission, with highest priority setting.
110 */
mwifiex_send_null_packet(struct mwifiex_private * priv,u8 flags)111 int mwifiex_send_null_packet(struct mwifiex_private *priv, u8 flags)
112 {
113 struct mwifiex_adapter *adapter = priv->adapter;
114 struct txpd *local_tx_pd;
115 struct mwifiex_tx_param tx_param;
116 /* sizeof(struct txpd) + Interface specific header */
117 #define NULL_PACKET_HDR 64
118 u32 data_len = NULL_PACKET_HDR;
119 struct sk_buff *skb;
120 int ret;
121 struct mwifiex_txinfo *tx_info = NULL;
122
123 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags))
124 return -1;
125
126 if (!priv->media_connected)
127 return -1;
128
129 if (adapter->data_sent)
130 return -1;
131
132 if (adapter->if_ops.is_port_ready &&
133 !adapter->if_ops.is_port_ready(priv))
134 return -1;
135
136 skb = dev_alloc_skb(data_len);
137 if (!skb)
138 return -1;
139
140 tx_info = MWIFIEX_SKB_TXCB(skb);
141 memset(tx_info, 0, sizeof(*tx_info));
142 tx_info->bss_num = priv->bss_num;
143 tx_info->bss_type = priv->bss_type;
144 tx_info->pkt_len = data_len -
145 (sizeof(struct txpd) + adapter->intf_hdr_len);
146 skb_reserve(skb, sizeof(struct txpd) + adapter->intf_hdr_len);
147 skb_push(skb, sizeof(struct txpd));
148
149 local_tx_pd = (struct txpd *) skb->data;
150 local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
151 local_tx_pd->flags = flags;
152 local_tx_pd->priority = WMM_HIGHEST_PRIORITY;
153 local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
154 local_tx_pd->bss_num = priv->bss_num;
155 local_tx_pd->bss_type = priv->bss_type;
156
157 skb_push(skb, adapter->intf_hdr_len);
158 if (adapter->iface_type == MWIFIEX_USB) {
159 ret = adapter->if_ops.host_to_card(adapter, priv->usb_port,
160 skb, NULL);
161 } else {
162 tx_param.next_pkt_len = 0;
163 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
164 skb, &tx_param);
165 }
166 switch (ret) {
167 case -EBUSY:
168 dev_kfree_skb_any(skb);
169 mwifiex_dbg(adapter, ERROR,
170 "%s: host_to_card failed: ret=%d\n",
171 __func__, ret);
172 adapter->dbg.num_tx_host_to_card_failure++;
173 break;
174 case -1:
175 dev_kfree_skb_any(skb);
176 mwifiex_dbg(adapter, ERROR,
177 "%s: host_to_card failed: ret=%d\n",
178 __func__, ret);
179 adapter->dbg.num_tx_host_to_card_failure++;
180 break;
181 case 0:
182 dev_kfree_skb_any(skb);
183 mwifiex_dbg(adapter, DATA,
184 "data: %s: host_to_card succeeded\n",
185 __func__);
186 adapter->tx_lock_flag = true;
187 break;
188 case -EINPROGRESS:
189 adapter->tx_lock_flag = true;
190 break;
191 default:
192 break;
193 }
194
195 return ret;
196 }
197
198 /*
199 * This function checks if we need to send last packet indication.
200 */
201 u8
mwifiex_check_last_packet_indication(struct mwifiex_private * priv)202 mwifiex_check_last_packet_indication(struct mwifiex_private *priv)
203 {
204 struct mwifiex_adapter *adapter = priv->adapter;
205 u8 ret = false;
206
207 if (!adapter->sleep_period.period)
208 return ret;
209 if (mwifiex_wmm_lists_empty(adapter))
210 ret = true;
211
212 if (ret && !adapter->cmd_sent && !adapter->curr_cmd &&
213 !is_command_pending(adapter)) {
214 adapter->delay_null_pkt = false;
215 ret = true;
216 } else {
217 ret = false;
218 adapter->delay_null_pkt = true;
219 }
220 return ret;
221 }
222