1// SPDX-License-Identifier: BSD-3-Clause-Clear
2/*
3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
4 */
5
6#include "testmode.h"
7#include <net/netlink.h>
8#include "debug.h"
9#include "wmi.h"
10#include "hw.h"
11#include "core.h"
12#include "testmode_i.h"
13
14static const struct nla_policy ath11k_tm_policy[ATH11K_TM_ATTR_MAX + 1] = {
15	[ATH11K_TM_ATTR_CMD]		= { .type = NLA_U32 },
16	[ATH11K_TM_ATTR_DATA]		= { .type = NLA_BINARY,
17					    .len = ATH11K_TM_DATA_MAX_LEN },
18	[ATH11K_TM_ATTR_WMI_CMDID]	= { .type = NLA_U32 },
19	[ATH11K_TM_ATTR_VERSION_MAJOR]	= { .type = NLA_U32 },
20	[ATH11K_TM_ATTR_VERSION_MINOR]	= { .type = NLA_U32 },
21};
22
23/* Returns true if callee consumes the skb and the skb should be discarded.
24 * Returns false if skb is not used. Does not sleep.
25 */
26bool ath11k_tm_event_wmi(struct ath11k *ar, u32 cmd_id, struct sk_buff *skb)
27{
28	struct sk_buff *nl_skb;
29	bool consumed;
30	int ret;
31
32	ath11k_dbg(ar->ab, ATH11K_DBG_TESTMODE,
33		   "testmode event wmi cmd_id %d skb %pK skb->len %d\n",
34		   cmd_id, skb, skb->len);
35
36	ath11k_dbg_dump(ar->ab, ATH11K_DBG_TESTMODE, NULL, "", skb->data, skb->len);
37
38	spin_lock_bh(&ar->data_lock);
39
40	consumed = true;
41
42	nl_skb = cfg80211_testmode_alloc_event_skb(ar->hw->wiphy,
43						   2 * sizeof(u32) + skb->len,
44						   GFP_ATOMIC);
45	if (!nl_skb) {
46		ath11k_warn(ar->ab,
47			    "failed to allocate skb for testmode wmi event\n");
48		goto out;
49	}
50
51	ret = nla_put_u32(nl_skb, ATH11K_TM_ATTR_CMD, ATH11K_TM_CMD_WMI);
52	if (ret) {
53		ath11k_warn(ar->ab,
54			    "failed to to put testmode wmi event cmd attribute: %d\n",
55			    ret);
56		kfree_skb(nl_skb);
57		goto out;
58	}
59
60	ret = nla_put_u32(nl_skb, ATH11K_TM_ATTR_WMI_CMDID, cmd_id);
61	if (ret) {
62		ath11k_warn(ar->ab,
63			    "failed to to put testmode wmi even cmd_id: %d\n",
64			    ret);
65		kfree_skb(nl_skb);
66		goto out;
67	}
68
69	ret = nla_put(nl_skb, ATH11K_TM_ATTR_DATA, skb->len, skb->data);
70	if (ret) {
71		ath11k_warn(ar->ab,
72			    "failed to copy skb to testmode wmi event: %d\n",
73			    ret);
74		kfree_skb(nl_skb);
75		goto out;
76	}
77
78	cfg80211_testmode_event(nl_skb, GFP_ATOMIC);
79
80out:
81	spin_unlock_bh(&ar->data_lock);
82
83	return consumed;
84}
85
86static int ath11k_tm_cmd_get_version(struct ath11k *ar, struct nlattr *tb[])
87{
88	struct sk_buff *skb;
89	int ret;
90
91	ath11k_dbg(ar->ab, ATH11K_DBG_TESTMODE,
92		   "testmode cmd get version_major %d version_minor %d\n",
93		   ATH11K_TESTMODE_VERSION_MAJOR,
94		   ATH11K_TESTMODE_VERSION_MINOR);
95
96	skb = cfg80211_testmode_alloc_reply_skb(ar->hw->wiphy,
97						nla_total_size(sizeof(u32)));
98	if (!skb)
99		return -ENOMEM;
100
101	ret = nla_put_u32(skb, ATH11K_TM_ATTR_VERSION_MAJOR,
102			  ATH11K_TESTMODE_VERSION_MAJOR);
103	if (ret) {
104		kfree_skb(skb);
105		return ret;
106	}
107
108	ret = nla_put_u32(skb, ATH11K_TM_ATTR_VERSION_MINOR,
109			  ATH11K_TESTMODE_VERSION_MINOR);
110	if (ret) {
111		kfree_skb(skb);
112		return ret;
113	}
114
115	return cfg80211_testmode_reply(skb);
116}
117
118static int ath11k_tm_cmd_wmi(struct ath11k *ar, struct nlattr *tb[])
119{
120	struct ath11k_pdev_wmi *wmi = ar->wmi;
121	struct sk_buff *skb;
122	u32 cmd_id, buf_len;
123	int ret;
124	void *buf;
125
126	mutex_lock(&ar->conf_mutex);
127
128	if (ar->state != ATH11K_STATE_ON) {
129		ret = -ENETDOWN;
130		goto out;
131	}
132
133	if (!tb[ATH11K_TM_ATTR_DATA]) {
134		ret = -EINVAL;
135		goto out;
136	}
137
138	if (!tb[ATH11K_TM_ATTR_WMI_CMDID]) {
139		ret = -EINVAL;
140		goto out;
141	}
142
143	buf = nla_data(tb[ATH11K_TM_ATTR_DATA]);
144	buf_len = nla_len(tb[ATH11K_TM_ATTR_DATA]);
145	cmd_id = nla_get_u32(tb[ATH11K_TM_ATTR_WMI_CMDID]);
146
147	ath11k_dbg(ar->ab, ATH11K_DBG_TESTMODE,
148		   "testmode cmd wmi cmd_id %d buf %pK buf_len %d\n",
149		   cmd_id, buf, buf_len);
150
151	ath11k_dbg_dump(ar->ab, ATH11K_DBG_TESTMODE, NULL, "", buf, buf_len);
152
153	skb = ath11k_wmi_alloc_skb(wmi->wmi_ab, buf_len);
154	if (!skb) {
155		ret = -ENOMEM;
156		goto out;
157	}
158
159	memcpy(skb->data, buf, buf_len);
160
161	ret = ath11k_wmi_cmd_send(wmi, skb, cmd_id);
162	if (ret) {
163		dev_kfree_skb(skb);
164		ath11k_warn(ar->ab, "failed to transmit wmi command (testmode): %d\n",
165			    ret);
166		goto out;
167	}
168
169	ret = 0;
170
171out:
172	mutex_unlock(&ar->conf_mutex);
173	return ret;
174}
175
176int ath11k_tm_cmd(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
177		  void *data, int len)
178{
179	struct ath11k *ar = hw->priv;
180	struct nlattr *tb[ATH11K_TM_ATTR_MAX + 1];
181	int ret;
182
183	ret = nla_parse(tb, ATH11K_TM_ATTR_MAX, data, len, ath11k_tm_policy,
184			NULL);
185	if (ret)
186		return ret;
187
188	if (!tb[ATH11K_TM_ATTR_CMD])
189		return -EINVAL;
190
191	switch (nla_get_u32(tb[ATH11K_TM_ATTR_CMD])) {
192	case ATH11K_TM_CMD_GET_VERSION:
193		return ath11k_tm_cmd_get_version(ar, tb);
194	case ATH11K_TM_CMD_WMI:
195		return ath11k_tm_cmd_wmi(ar, tb);
196	default:
197		return -EOPNOTSUPP;
198	}
199}
200