summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/brcm80211/brcmfmac/vendor.c
blob: 5960d827508c9d42a5f4a7c29e18ab80e559aacb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
/*
 * Copyright (c) 2014 Broadcom Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/vmalloc.h>
#include <net/cfg80211.h>
#include <net/netlink.h>

#include <brcmu_wifi.h>
#include "fwil_types.h"
#include "dhd.h"
#include "p2p.h"
#include "dhd_dbg.h"
#include "wl_cfg80211.h"
#include "vendor.h"
#include "fwil.h"

static int brcmf_cfg80211_vndr_cmds_dcmd_handler(struct wiphy *wiphy,
						 struct wireless_dev *wdev,
						 const void *data, int len)
{
	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
	struct net_device *ndev = cfg_to_ndev(cfg);
	const struct brcmf_vndr_dcmd_hdr *cmdhdr = data;
	struct sk_buff *reply;
	int ret, payload, ret_len;
	void *dcmd_buf = NULL, *wr_pointer;
	u16 msglen, maxmsglen = PAGE_SIZE - 0x100;

	brcmf_dbg(TRACE, "cmd %x set %d len %d\n", cmdhdr->cmd, cmdhdr->set,
		  cmdhdr->len);

	len -= sizeof(struct brcmf_vndr_dcmd_hdr);
	ret_len = cmdhdr->len;
	if (ret_len > 0 || len > 0) {
		if (len > BRCMF_DCMD_MAXLEN) {
			brcmf_err("oversize input buffer %d\n", len);
			len = BRCMF_DCMD_MAXLEN;
		}
		if (ret_len > BRCMF_DCMD_MAXLEN) {
			brcmf_err("oversize return buffer %d\n", ret_len);
			ret_len = BRCMF_DCMD_MAXLEN;
		}
		payload = max(ret_len, len) + 1;
		dcmd_buf = vzalloc(payload);
		if (NULL == dcmd_buf)
			return -ENOMEM;

		memcpy(dcmd_buf, (void *)cmdhdr + cmdhdr->offset, len);
		*(char *)(dcmd_buf + len)  = '\0';
	}

	if (cmdhdr->set)
		ret = brcmf_fil_cmd_data_set(netdev_priv(ndev), cmdhdr->cmd,
					     dcmd_buf, ret_len);
	else
		ret = brcmf_fil_cmd_data_get(netdev_priv(ndev), cmdhdr->cmd,
					     dcmd_buf, ret_len);
	if (ret != 0)
		goto exit;

	wr_pointer = dcmd_buf;
	while (ret_len > 0) {
		msglen = ret_len > maxmsglen ? maxmsglen : ret_len;
		ret_len -= msglen;
		payload = msglen + sizeof(msglen);
		reply = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, payload);
		if (NULL == reply) {
			ret = -ENOMEM;
			break;
		}

		if (nla_put(reply, BRCMF_NLATTR_DATA, msglen, wr_pointer) ||
		    nla_put_u16(reply, BRCMF_NLATTR_LEN, msglen)) {
			kfree_skb(reply);
			ret = -ENOBUFS;
			break;
		}

		ret = cfg80211_vendor_cmd_reply(reply);
		if (ret)
			break;

		wr_pointer += msglen;
	}

exit:
	vfree(dcmd_buf);

	return ret;
}

const struct wiphy_vendor_command brcmf_vendor_cmds[] = {
	{
		{
			.vendor_id = BROADCOM_OUI,
			.subcmd = BRCMF_VNDR_CMDS_DCMD
		},
		.flags = WIPHY_VENDOR_CMD_NEED_WDEV |
			 WIPHY_VENDOR_CMD_NEED_NETDEV,
		.doit = brcmf_cfg80211_vndr_cmds_dcmd_handler
	},
};
OpenPOWER on IntegriCloud