1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * NXP Wireless LAN device driver: station TX data handling
4 *
5 * Copyright 2011-2024 NXP
6 */
7
8 #include "cfg.h"
9 #include "util.h"
10 #include "fw.h"
11 #include "main.h"
12 #include "cmdevt.h"
13 #include "wmm.h"
14
15 /*
16 * Fill TxPD for TX packets by inserting it before payload and setting required fields.
17 */
nxpwifi_process_sta_txpd(struct nxpwifi_private * priv,struct sk_buff * skb)18 void nxpwifi_process_sta_txpd(struct nxpwifi_private *priv,
19 struct sk_buff *skb)
20 {
21 struct nxpwifi_adapter *adapter = priv->adapter;
22 struct txpd *local_tx_pd;
23 struct nxpwifi_txinfo *tx_info = NXPWIFI_SKB_TXCB(skb);
24 unsigned int pad;
25 u16 pkt_type, pkt_length, pkt_offset;
26 int hroom = adapter->intf_hdr_len;
27 u32 tx_control;
28
29 pkt_type = nxpwifi_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0;
30
31 pad = ((uintptr_t)skb->data - (sizeof(*local_tx_pd) + hroom)) &
32 (NXPWIFI_DMA_ALIGN_SZ - 1);
33 skb_push(skb, sizeof(*local_tx_pd) + pad);
34
35 local_tx_pd = (struct txpd *)skb->data;
36 memset(local_tx_pd, 0, sizeof(struct txpd));
37 local_tx_pd->bss_num = priv->bss_num;
38 local_tx_pd->bss_type = priv->bss_type;
39
40 pkt_length = (u16)(skb->len - (sizeof(struct txpd) + pad));
41 if (pkt_type == PKT_TYPE_MGMT)
42 pkt_length -= NXPWIFI_MGMT_FRAME_HEADER_SIZE;
43 local_tx_pd->tx_pkt_length = cpu_to_le16(pkt_length);
44
45 local_tx_pd->priority = (u8)skb->priority;
46 local_tx_pd->pkt_delay_2ms =
47 nxpwifi_wmm_compute_drv_pkt_delay(priv, skb);
48
49 if (tx_info->flags & NXPWIFI_BUF_FLAG_EAPOL_TX_STATUS ||
50 tx_info->flags & NXPWIFI_BUF_FLAG_ACTION_TX_STATUS) {
51 local_tx_pd->tx_token_id = tx_info->ack_frame_id;
52 local_tx_pd->flags |= NXPWIFI_TXPD_FLAGS_REQ_TX_STATUS;
53 }
54
55 if (local_tx_pd->priority <
56 ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl)) {
57 /*
58 * Set the priority specific tx_control field, setting of 0 will
59 * cause the default value to be used later in this function
60 */
61 tx_control =
62 priv->wmm.user_pri_pkt_tx_ctrl[local_tx_pd->priority];
63 local_tx_pd->tx_control = cpu_to_le32(tx_control);
64 }
65
66 if (adapter->pps_uapsd_mode) {
67 if (nxpwifi_check_last_packet_indication(priv)) {
68 adapter->tx_lock_flag = true;
69 local_tx_pd->flags =
70 NXPWIFI_TxPD_POWER_MGMT_LAST_PACKET;
71 }
72 }
73
74 /* Offset of actual data */
75 pkt_offset = sizeof(struct txpd) + pad;
76 if (pkt_type == PKT_TYPE_MGMT) {
77 /* Set the packet type and add header for management frame */
78 local_tx_pd->tx_pkt_type = cpu_to_le16(pkt_type);
79 pkt_offset += NXPWIFI_MGMT_FRAME_HEADER_SIZE;
80 }
81
82 local_tx_pd->tx_pkt_offset = cpu_to_le16(pkt_offset);
83
84 /* make space for adapter->intf_hdr_len */
85 skb_push(skb, hroom);
86
87 if (!local_tx_pd->tx_control)
88 /* TxCtrl set by user or default */
89 local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
90 }
91
92 /* Send a NULL-data frame with TxPD at highest priority. */
nxpwifi_send_null_packet(struct nxpwifi_private * priv,u8 flags)93 int nxpwifi_send_null_packet(struct nxpwifi_private *priv, u8 flags)
94 {
95 struct nxpwifi_adapter *adapter = priv->adapter;
96 struct txpd *local_tx_pd;
97 struct nxpwifi_tx_param tx_param;
98 /* sizeof(struct txpd) + Interface specific header */
99 #define NULL_PACKET_HDR 64
100 u32 data_len = NULL_PACKET_HDR;
101 struct sk_buff *skb;
102 int ret;
103 struct nxpwifi_txinfo *tx_info = NULL;
104
105 if (test_bit(NXPWIFI_SURPRISE_REMOVED, &adapter->work_flags))
106 return -EPERM;
107
108 if (!priv->media_connected)
109 return -EPERM;
110
111 if (adapter->data_sent)
112 return -EBUSY;
113
114 skb = dev_alloc_skb(data_len);
115 if (!skb)
116 return -ENOMEM;
117
118 tx_info = NXPWIFI_SKB_TXCB(skb);
119 memset(tx_info, 0, sizeof(*tx_info));
120 tx_info->bss_num = priv->bss_num;
121 tx_info->bss_type = priv->bss_type;
122 tx_info->pkt_len = data_len -
123 (sizeof(struct txpd) + adapter->intf_hdr_len);
124 skb_reserve(skb, sizeof(struct txpd) + adapter->intf_hdr_len);
125 skb_push(skb, sizeof(struct txpd));
126
127 local_tx_pd = (struct txpd *)skb->data;
128 local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
129 local_tx_pd->flags = flags;
130 local_tx_pd->priority = WMM_HIGHEST_PRIORITY;
131 local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
132 local_tx_pd->bss_num = priv->bss_num;
133 local_tx_pd->bss_type = priv->bss_type;
134
135 skb_push(skb, adapter->intf_hdr_len);
136 tx_param.next_pkt_len = 0;
137 ret = adapter->if_ops.host_to_card(adapter, NXPWIFI_TYPE_DATA,
138 skb, &tx_param);
139
140 switch (ret) {
141 case -EBUSY:
142 dev_kfree_skb_any(skb);
143 nxpwifi_dbg(adapter, ERROR,
144 "%s: host_to_card failed: ret=%d\n",
145 __func__, ret);
146 adapter->dbg.num_tx_host_to_card_failure++;
147 break;
148 case 0:
149 dev_kfree_skb_any(skb);
150 nxpwifi_dbg(adapter, DATA,
151 "data: %s: host_to_card succeeded\n",
152 __func__);
153 adapter->tx_lock_flag = true;
154 break;
155 case -EINPROGRESS:
156 adapter->tx_lock_flag = true;
157 break;
158 default:
159 dev_kfree_skb_any(skb);
160 nxpwifi_dbg(adapter, ERROR,
161 "%s: host_to_card failed: ret=%d\n",
162 __func__, ret);
163 adapter->dbg.num_tx_host_to_card_failure++;
164 break;
165 }
166
167 return ret;
168 }
169
170 /* Check whether a last‑packet indication needs to be sent. */
nxpwifi_check_last_packet_indication(struct nxpwifi_private * priv)171 u8 nxpwifi_check_last_packet_indication(struct nxpwifi_private *priv)
172 {
173 struct nxpwifi_adapter *adapter = priv->adapter;
174 u8 ret = false;
175
176 if (!adapter->sleep_period.period)
177 return ret;
178 if (nxpwifi_wmm_lists_empty(adapter))
179 ret = true;
180
181 if (ret && !adapter->cmd_sent && !adapter->curr_cmd &&
182 !nxpwifi_is_command_pending(adapter)) {
183 adapter->delay_null_pkt = false;
184 ret = true;
185 } else {
186 ret = false;
187 adapter->delay_null_pkt = true;
188 }
189 return ret;
190 }
191