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_length, 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 pkt_length = (u16)(skb->len - (sizeof(struct txpd) + pad));
53 if (pkt_type == PKT_TYPE_MGMT)
54 pkt_length -= MWIFIEX_MGMT_FRAME_HEADER_SIZE;
55 local_tx_pd->tx_pkt_length = cpu_to_le16(pkt_length);
56
57 local_tx_pd->priority = (u8) skb->priority;
58 local_tx_pd->pkt_delay_2ms =
59 mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
60
61 if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS ||
62 tx_info->flags & MWIFIEX_BUF_FLAG_ACTION_TX_STATUS) {
63 local_tx_pd->tx_token_id = tx_info->ack_frame_id;
64 local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_REQ_TX_STATUS;
65 }
66
67 if (local_tx_pd->priority <
68 ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl))
69 /*
70 * Set the priority specific tx_control field, setting of 0 will
71 * cause the default value to be used later in this function
72 */
73 local_tx_pd->tx_control =
74 cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[local_tx_pd->
75 priority]);
76
77 if (adapter->pps_uapsd_mode) {
78 if (mwifiex_check_last_packet_indication(priv)) {
79 adapter->tx_lock_flag = true;
80 local_tx_pd->flags =
81 MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET;
82 }
83 }
84
85 if (tx_info->flags & MWIFIEX_BUF_FLAG_TDLS_PKT)
86 local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_TDLS_PACKET;
87
88 /* Offset of actual data */
89 pkt_offset = sizeof(struct txpd) + pad;
90 if (pkt_type == PKT_TYPE_MGMT) {
91 /* Set the packet type and add header for management frame */
92 local_tx_pd->tx_pkt_type = cpu_to_le16(pkt_type);
93 pkt_offset += MWIFIEX_MGMT_FRAME_HEADER_SIZE;
94 }
95
96 local_tx_pd->tx_pkt_offset = cpu_to_le16(pkt_offset);
97
98 /* make space for adapter->intf_hdr_len */
99 skb_push(skb, hroom);
100
101 if (!local_tx_pd->tx_control)
102 /* TxCtrl set by user or default */
103 local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
104 }
105
106 /*
107 * This function tells firmware to send a NULL data packet.
108 *
109 * The function creates a NULL data packet with TxPD and sends to the
110 * firmware for transmission, with highest priority setting.
111 */
mwifiex_send_null_packet(struct mwifiex_private * priv,u8 flags)112 int mwifiex_send_null_packet(struct mwifiex_private *priv, u8 flags)
113 {
114 struct mwifiex_adapter *adapter = priv->adapter;
115 struct txpd *local_tx_pd;
116 struct mwifiex_tx_param tx_param;
117 /* sizeof(struct txpd) + Interface specific header */
118 #define NULL_PACKET_HDR 64
119 u32 data_len = NULL_PACKET_HDR;
120 struct sk_buff *skb;
121 int ret;
122 struct mwifiex_txinfo *tx_info = NULL;
123
124 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags))
125 return -1;
126
127 if (!priv->media_connected)
128 return -1;
129
130 if (adapter->data_sent)
131 return -1;
132
133 if (adapter->if_ops.is_port_ready &&
134 !adapter->if_ops.is_port_ready(priv))
135 return -1;
136
137 skb = dev_alloc_skb(data_len);
138 if (!skb)
139 return -1;
140
141 tx_info = MWIFIEX_SKB_TXCB(skb);
142 memset(tx_info, 0, sizeof(*tx_info));
143 tx_info->bss_num = priv->bss_num;
144 tx_info->bss_type = priv->bss_type;
145 tx_info->pkt_len = data_len -
146 (sizeof(struct txpd) + adapter->intf_hdr_len);
147 skb_reserve(skb, sizeof(struct txpd) + adapter->intf_hdr_len);
148 skb_push(skb, sizeof(struct txpd));
149
150 local_tx_pd = (struct txpd *) skb->data;
151 local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
152 local_tx_pd->flags = flags;
153 local_tx_pd->priority = WMM_HIGHEST_PRIORITY;
154 local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
155 local_tx_pd->bss_num = priv->bss_num;
156 local_tx_pd->bss_type = priv->bss_type;
157
158 skb_push(skb, adapter->intf_hdr_len);
159 if (adapter->iface_type == MWIFIEX_USB) {
160 ret = adapter->if_ops.host_to_card(adapter, priv->usb_port,
161 skb, NULL);
162 } else {
163 tx_param.next_pkt_len = 0;
164 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
165 skb, &tx_param);
166 }
167 switch (ret) {
168 case -EBUSY:
169 dev_kfree_skb_any(skb);
170 mwifiex_dbg(adapter, ERROR,
171 "%s: host_to_card failed: ret=%d\n",
172 __func__, ret);
173 adapter->dbg.num_tx_host_to_card_failure++;
174 break;
175 case -1:
176 dev_kfree_skb_any(skb);
177 mwifiex_dbg(adapter, ERROR,
178 "%s: host_to_card failed: ret=%d\n",
179 __func__, ret);
180 adapter->dbg.num_tx_host_to_card_failure++;
181 break;
182 case 0:
183 dev_kfree_skb_any(skb);
184 mwifiex_dbg(adapter, DATA,
185 "data: %s: host_to_card succeeded\n",
186 __func__);
187 adapter->tx_lock_flag = true;
188 break;
189 case -EINPROGRESS:
190 adapter->tx_lock_flag = true;
191 break;
192 default:
193 break;
194 }
195
196 return ret;
197 }
198
199 /*
200 * This function checks if we need to send last packet indication.
201 */
202 u8
mwifiex_check_last_packet_indication(struct mwifiex_private * priv)203 mwifiex_check_last_packet_indication(struct mwifiex_private *priv)
204 {
205 struct mwifiex_adapter *adapter = priv->adapter;
206 u8 ret = false;
207
208 if (!adapter->sleep_period.period)
209 return ret;
210 if (mwifiex_wmm_lists_empty(adapter))
211 ret = true;
212
213 if (ret && !adapter->cmd_sent && !adapter->curr_cmd &&
214 !is_command_pending(adapter)) {
215 adapter->delay_null_pkt = false;
216 ret = true;
217 } else {
218 ret = false;
219 adapter->delay_null_pkt = true;
220 }
221 return ret;
222 }
223