1 // SPDX-License-Identifier: ISC
3 * Copyright (c) 2014 Broadcom Corporation
6 #include <linux/vmalloc.h>
7 #include <net/cfg80211.h>
8 #include <net/netlink.h>
10 #include <brcmu_wifi.h>
11 #include "fwil_types.h"
19 static int brcmf_cfg80211_vndr_cmds_dcmd_handler(struct wiphy *wiphy,
20 struct wireless_dev *wdev,
21 const void *data, int len)
23 struct brcmf_cfg80211_vif *vif;
25 const struct brcmf_vndr_dcmd_hdr *cmdhdr = data;
26 struct sk_buff *reply;
27 unsigned int payload, ret_len;
28 void *dcmd_buf = NULL, *wr_pointer;
29 u16 msglen, maxmsglen = PAGE_SIZE - 0x100;
32 if (len < sizeof(*cmdhdr)) {
33 brcmf_err("vendor command too short: %d\n", len);
37 vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
40 brcmf_dbg(TRACE, "ifidx=%d, cmd=%d\n", ifp->ifidx, cmdhdr->cmd);
42 if (cmdhdr->offset > len) {
43 brcmf_err("bad buffer offset %d > %d\n", cmdhdr->offset, len);
47 len -= cmdhdr->offset;
48 ret_len = cmdhdr->len;
49 if (ret_len > 0 || len > 0) {
50 if (len > BRCMF_DCMD_MAXLEN) {
51 brcmf_err("oversize input buffer %d\n", len);
52 len = BRCMF_DCMD_MAXLEN;
54 if (ret_len > BRCMF_DCMD_MAXLEN) {
55 brcmf_err("oversize return buffer %d\n", ret_len);
56 ret_len = BRCMF_DCMD_MAXLEN;
58 payload = max_t(unsigned int, ret_len, len) + 1;
59 dcmd_buf = vzalloc(payload);
63 memcpy(dcmd_buf, (void *)cmdhdr + cmdhdr->offset, len);
64 *(char *)(dcmd_buf + len) = '\0';
68 ret = brcmf_fil_cmd_data_set(ifp, cmdhdr->cmd, dcmd_buf,
71 ret = brcmf_fil_cmd_data_get(ifp, cmdhdr->cmd, dcmd_buf,
76 wr_pointer = dcmd_buf;
78 msglen = ret_len > maxmsglen ? maxmsglen : ret_len;
80 payload = msglen + sizeof(msglen);
81 reply = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, payload);
87 if (nla_put(reply, BRCMF_NLATTR_DATA, msglen, wr_pointer) ||
88 nla_put_u16(reply, BRCMF_NLATTR_LEN, msglen)) {
94 ret = cfg80211_vendor_cmd_reply(reply);
107 const struct wiphy_vendor_command brcmf_vendor_cmds[] = {
110 .vendor_id = BROADCOM_OUI,
111 .subcmd = BRCMF_VNDR_CMDS_DCMD
113 .flags = WIPHY_VENDOR_CMD_NEED_WDEV |
114 WIPHY_VENDOR_CMD_NEED_NETDEV,
115 .doit = brcmf_cfg80211_vndr_cmds_dcmd_handler