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brcmfmac: Add support for scheduled scan mac randomization 

Scheduled scan be requested to use mac randomization. This patch
checks the flags and enables the randomization if desired.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Hante Meuleman 2016-01-02 09:41:38 +01:00 committed by Kalle Valo
parent 3f5893d1b3
commit 48ed16e86b
4 changed files with 77 additions and 8 deletions
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54
drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
View File

@ -3544,9 +3544,14 @@ static int brcmf_dev_pno_clean(struct net_device *ndev)
return ret;
}
static int brcmf_dev_pno_config(struct net_device *ndev)
static int brcmf_dev_pno_config(struct brcmf_if *ifp,
struct cfg80211_sched_scan_request *request)
{
struct brcmf_pno_param_le pfn_param;
struct brcmf_pno_macaddr_le pfn_mac;
s32 err;
u8 *mac_mask;
int i;
memset(&pfn_param, 0, sizeof(pfn_param));
pfn_param.version = cpu_to_le32(BRCMF_PNO_VERSION);
@ -3559,8 +3564,37 @@ static int brcmf_dev_pno_config(struct net_device *ndev)
/* set up pno scan fr */
pfn_param.scan_freq = cpu_to_le32(BRCMF_PNO_TIME);
return brcmf_fil_iovar_data_set(netdev_priv(ndev), "pfn_set",
&pfn_param, sizeof(pfn_param));
err = brcmf_fil_iovar_data_set(ifp, "pfn_set", &pfn_param,
sizeof(pfn_param));
if (err) {
brcmf_err("pfn_set failed, err=%d\n", err);
return err;
}
/* Find out if mac randomization should be turned on */
if (!(request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR))
return 0;
pfn_mac.version = BRCMF_PFN_MACADDR_CFG_VER;
pfn_mac.flags = BRCMF_PFN_MAC_OUI_ONLY | BRCMF_PFN_SET_MAC_UNASSOC;
memcpy(pfn_mac.mac, request->mac_addr, ETH_ALEN);
mac_mask = request->mac_addr_mask;
for (i = 0; i < ETH_ALEN; i++) {
pfn_mac.mac[i] &= mac_mask[i];
pfn_mac.mac[i] |= get_random_int() & ~(mac_mask[i]);
}
/* Clear multi bit */
pfn_mac.mac[0] &= 0xFE;
/* Set locally administered */
pfn_mac.mac[0] |= 0x02;
err = brcmf_fil_iovar_data_set(ifp, "pfn_macaddr", &pfn_mac,
sizeof(pfn_mac));
if (err)
brcmf_err("pfn_macaddr failed, err=%d\n", err);
return err;
}
static int
@ -3614,11 +3648,8 @@ brcmf_cfg80211_sched_scan_start(struct wiphy *wiphy,
}
/* configure pno */
ret = brcmf_dev_pno_config(ndev);
if (ret < 0) {
brcmf_err("PNO setup failed!! ret=%d\n", ret);
if (brcmf_dev_pno_config(ifp, request))
return -EINVAL;
}
/* configure each match set */
for (i = 0; i < request->n_match_sets; i++) {
@ -6455,6 +6486,15 @@ struct brcmf_cfg80211_info *brcmf_cfg80211_attach(struct brcmf_pub *drvr,
goto wiphy_unreg_out;
}
/* Fill in some of the advertised nl80211 supported features */
if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_SCAN_RANDOM_MAC)) {
wiphy->features |= NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
#ifdef CONFIG_PM
if (wiphy->wowlan->flags & WIPHY_WOWLAN_NET_DETECT)
wiphy->features |= NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
#endif
}
return cfg;
wiphy_unreg_out:

10
drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c
View File

@ -18,10 +18,12 @@
#include <linux/module.h>
#include <brcm_hw_ids.h>
#include <brcmu_wifi.h>
#include "core.h"
#include "bus.h"
#include "debug.h"
#include "fwil.h"
#include "fwil_types.h"
#include "feature.h"
@ -129,6 +131,8 @@ static void brcmf_feat_iovar_int_set(struct brcmf_if *ifp,
void brcmf_feat_attach(struct brcmf_pub *drvr)
{
struct brcmf_if *ifp = brcmf_get_ifp(drvr, 0);
struct brcmf_pno_macaddr_le pfn_mac;
s32 err;
brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_MCHAN, "mchan");
brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_PNO, "pfn");
@ -140,6 +144,12 @@ void brcmf_feat_attach(struct brcmf_pub *drvr)
brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_RSDB, "rsdb_mode");
brcmf_feat_iovar_int_get(ifp, BRCMF_FEAT_TDLS, "tdls_enable");
pfn_mac.version = BRCMF_PFN_MACADDR_CFG_VER;
err = brcmf_fil_iovar_data_get(ifp, "pfn_macaddr", &pfn_mac,
sizeof(pfn_mac));
if (!err)
ifp->drvr->feat_flags |= BIT(BRCMF_FEAT_SCAN_RANDOM_MAC);
if (brcmf_feature_disable) {
brcmf_dbg(INFO, "Features: 0x%02x, disable: 0x%02x\n",
ifp->drvr->feat_flags, brcmf_feature_disable);

4
drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.h
View File

@ -26,6 +26,7 @@
* P2P: peer-to-peer
* RSDB: Real Simultaneous Dual Band
* TDLS: Tunneled Direct Link Setup
* SCAN_RANDOM_MAC: Random MAC during (net detect) scheduled scan.
*/
#define BRCMF_FEAT_LIST \
BRCMF_FEAT_DEF(MBSS) \
@ -34,7 +35,8 @@
BRCMF_FEAT_DEF(WOWL) \
BRCMF_FEAT_DEF(P2P) \
BRCMF_FEAT_DEF(RSDB) \
BRCMF_FEAT_DEF(TDLS)
BRCMF_FEAT_DEF(TDLS) \
BRCMF_FEAT_DEF(SCAN_RANDOM_MAC)
/*
* Quirks:

17
drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h
View File

@ -128,6 +128,10 @@
#define BRCMF_MAXPMKID 16 /* max # PMKID cache entries */
#define BRCMF_PFN_MACADDR_CFG_VER 1
#define BRCMF_PFN_MAC_OUI_ONLY BIT(0)
#define BRCMF_PFN_SET_MAC_UNASSOC BIT(1)
/* join preference types for join_pref iovar */
enum brcmf_join_pref_types {
BRCMF_JOIN_PREF_RSSI = 1,
@ -751,6 +755,19 @@ struct brcmf_pno_scanresults_le {
__le32 count;
};
/**
* struct brcmf_pno_macaddr_le - to configure PNO macaddr randomization.
*
* @version: PNO version identifier.
* @flags: Flags defining how mac addrss should be used.
* @mac: MAC address.
*/
struct brcmf_pno_macaddr_le {
u8 version;
u8 flags;
u8 mac[ETH_ALEN];
};
/**
* struct brcmf_pktcnt_le - packet counters.
*