brcmfmac: allocate struct brcmf_pub instance using wiphy_new()

Rework the driver so the wiphy instance holds the main driver information
in its private buffer. Previously it held struct brcmf_cfg80211_info
instance so a bit of reorg was needed. This was done so that the wiphy
name or its parent device can be shown in debug output.

Reviewed-by: Hante Meuleman <[email protected]>
Reviewed-by: Pieter-Paul Giesberts <[email protected]>
Reviewed-by: Franky Lin <[email protected]>
Signed-off-by: Arend van Spriel <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>

Author: Arend Van Spriel

drivers/net/wireless/broadcom/brcm80211/brcmfmac/btcoex.c

@@ -462,7 +462,7 @@ static void brcmf_btcoex_dhcp_end(struct brcmf_btcoex_info *btci)
 int brcmf_btcoex_set_mode(struct brcmf_cfg80211_vif *vif,
 			  enum brcmf_btcoex_mode mode, u16 duration)
 {
-	struct brcmf_cfg80211_info *cfg = wiphy_priv(vif->wdev.wiphy);
+	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(vif->wdev.wiphy);
 	struct brcmf_btcoex_info *btci = cfg->btcoex;
 	struct brcmf_if *ifp = brcmf_get_ifp(cfg->pub, 0);
 

drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c

@@ -753,7 +753,7 @@ s32 brcmf_notify_escan_complete(struct brcmf_cfg80211_info *cfg,
 static int brcmf_cfg80211_del_ap_iface(struct wiphy *wiphy,
 				       struct wireless_dev *wdev)
 {
-	struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
+	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 	struct net_device *ndev = wdev->netdev;
 	struct brcmf_if *ifp = netdev_priv(ndev);
 	int ret;
@@ -786,7 +786,7 @@ static int brcmf_cfg80211_del_ap_iface(struct wiphy *wiphy,
 static
 int brcmf_cfg80211_del_iface(struct wiphy *wiphy, struct wireless_dev *wdev)
 {
-	struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
+	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 	struct net_device *ndev = wdev->netdev;
 
 	if (ndev && ndev == cfg_to_ndev(cfg))
@@ -831,7 +831,7 @@ brcmf_cfg80211_change_iface(struct wiphy *wiphy, struct net_device *ndev,
 			 enum nl80211_iftype type,
 			 struct vif_params *params)
 {
-	struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
+	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 	struct brcmf_if *ifp = netdev_priv(ndev);
 	struct brcmf_cfg80211_vif *vif = ifp->vif;
 	s32 infra = 0;
@@ -2127,17 +2127,15 @@ static s32
 brcmf_cfg80211_get_tx_power(struct wiphy *wiphy, struct wireless_dev *wdev,
 			    s32 *dbm)
 {
-	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
-	struct net_device *ndev = cfg_to_ndev(cfg);
-	struct brcmf_if *ifp = netdev_priv(ndev);
+	struct brcmf_cfg80211_vif *vif = wdev_to_vif(wdev);
 	s32 qdbm = 0;
 	s32 err;
 
 	brcmf_dbg(TRACE, "Enter\n");
-	if (!check_vif_up(ifp->vif))
+	if (!check_vif_up(vif))
 		return -EIO;
 
-	err = brcmf_fil_iovar_int_get(ifp, "qtxpower", &qdbm);
+	err = brcmf_fil_iovar_int_get(vif->ifp, "qtxpower", &qdbm);
 	if (err) {
 		brcmf_err("error (%d)\n", err);
 		goto done;
@@ -3358,7 +3356,7 @@ brcmf_cfg80211_sched_scan_start(struct wiphy *wiphy,
 				struct cfg80211_sched_scan_request *req)
 {
 	struct brcmf_if *ifp = netdev_priv(ndev);
-	struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
+	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
 
 	brcmf_dbg(SCAN, "Enter: n_match_sets=%d n_ssids=%d\n",
 		  req->n_match_sets, req->n_ssids);
@@ -5190,6 +5188,12 @@ static struct cfg80211_ops brcmf_cfg80211_ops = {
 	.del_pmk = brcmf_cfg80211_del_pmk,
 };
 
+struct cfg80211_ops *brcmf_cfg80211_get_ops(void)
+{
+	return kmemdup(&brcmf_cfg80211_ops, sizeof(brcmf_cfg80211_ops),
+		       GFP_KERNEL);
+}
+
 struct brcmf_cfg80211_vif *brcmf_alloc_vif(struct brcmf_cfg80211_info *cfg,
 					   enum nl80211_iftype type)
 {
@@ -5897,7 +5901,7 @@ static void brcmf_update_bw40_channel_flag(struct ieee80211_channel *channel,
 static int brcmf_construct_chaninfo(struct brcmf_cfg80211_info *cfg,
 				    u32 bw_cap[])
 {
-	struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
+	struct brcmf_if *ifp = brcmf_get_ifp(cfg->pub, 0);
 	struct ieee80211_supported_band *band;
 	struct ieee80211_channel *channel;
 	struct wiphy *wiphy;
@@ -6012,7 +6016,7 @@ static int brcmf_construct_chaninfo(struct brcmf_cfg80211_info *cfg,
 
 static int brcmf_enable_bw40_2g(struct brcmf_cfg80211_info *cfg)
 {
-	struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
+	struct brcmf_if *ifp = brcmf_get_ifp(cfg->pub, 0);
 	struct ieee80211_supported_band *band;
 	struct brcmf_fil_bwcap_le band_bwcap;
 	struct brcmf_chanspec_list *list;
@@ -6197,10 +6201,10 @@ static void brcmf_update_vht_cap(struct ieee80211_supported_band *band,
 	}
 }
 
-static int brcmf_setup_wiphybands(struct wiphy *wiphy)
+static int brcmf_setup_wiphybands(struct brcmf_cfg80211_info *cfg)
 {
-	struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
-	struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
+	struct brcmf_if *ifp = brcmf_get_ifp(cfg->pub, 0);
+	struct wiphy *wiphy;
 	u32 nmode = 0;
 	u32 vhtmode = 0;
 	u32 bw_cap[2] = { WLC_BW_20MHZ_BIT, WLC_BW_20MHZ_BIT };
@@ -6794,8 +6798,8 @@ static s32 brcmf_translate_country_code(struct brcmf_pub *drvr, char alpha2[2],
 static void brcmf_cfg80211_reg_notifier(struct wiphy *wiphy,
 					struct regulatory_request *req)
 {
-	struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
-	struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
+	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
+	struct brcmf_if *ifp = brcmf_get_ifp(cfg->pub, 0);
 	struct brcmf_fil_country_le ccreq;
 	s32 err;
 	int i;
@@ -6830,7 +6834,7 @@ static void brcmf_cfg80211_reg_notifier(struct wiphy *wiphy,
 		brcmf_err("Firmware rejected country setting\n");
 		return;
 	}
-	brcmf_setup_wiphybands(wiphy);
+	brcmf_setup_wiphybands(cfg);
 }
 
 static void brcmf_free_wiphy(struct wiphy *wiphy)
@@ -6857,17 +6861,15 @@ static void brcmf_free_wiphy(struct wiphy *wiphy)
 	if (wiphy->wowlan != &brcmf_wowlan_support)
 		kfree(wiphy->wowlan);
 #endif
-	wiphy_free(wiphy);
 }
 
 struct brcmf_cfg80211_info *brcmf_cfg80211_attach(struct brcmf_pub *drvr,
-						  struct device *busdev,
+						  struct cfg80211_ops *ops,
 						  bool p2pdev_forced)
 {
+	struct wiphy *wiphy = drvr->wiphy;
 	struct net_device *ndev = brcmf_get_ifp(drvr, 0)->ndev;
 	struct brcmf_cfg80211_info *cfg;
-	struct wiphy *wiphy;
-	struct cfg80211_ops *ops;
 	struct brcmf_cfg80211_vif *vif;
 	struct brcmf_if *ifp;
 	s32 err = 0;
@@ -6879,26 +6881,13 @@ struct brcmf_cfg80211_info *brcmf_cfg80211_attach(struct brcmf_pub *drvr,
 		return NULL;
 	}
 
-	ops = kmemdup(&brcmf_cfg80211_ops, sizeof(*ops), GFP_KERNEL);
-	if (!ops)
-		return NULL;
-
-	ifp = netdev_priv(ndev);
-#ifdef CONFIG_PM
-	if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_WOWL_GTK))
-		ops->set_rekey_data = brcmf_cfg80211_set_rekey_data;
-#endif
-	wiphy = wiphy_new(ops, sizeof(struct brcmf_cfg80211_info));
-	if (!wiphy) {
+	cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
+	if (!cfg) {
 		brcmf_err("Could not allocate wiphy device\n");
-		goto ops_out;
+		return NULL;
 	}
-	memcpy(wiphy->perm_addr, drvr->mac, ETH_ALEN);
-	set_wiphy_dev(wiphy, busdev);
 
-	cfg = wiphy_priv(wiphy);
 	cfg->wiphy = wiphy;
-	cfg->ops = ops;
 	cfg->pub = drvr;
 	init_vif_event(&cfg->vif_event);
 	INIT_LIST_HEAD(&cfg->vif_list);
@@ -6907,6 +6896,7 @@ struct brcmf_cfg80211_info *brcmf_cfg80211_attach(struct brcmf_pub *drvr,
 	if (IS_ERR(vif))
 		goto wiphy_out;
 
+	ifp = netdev_priv(ndev);
 	vif->ifp = ifp;
 	vif->wdev.netdev = ndev;
 	ndev->ieee80211_ptr = &vif->wdev;
@@ -6933,6 +6923,11 @@ struct brcmf_cfg80211_info *brcmf_cfg80211_attach(struct brcmf_pub *drvr,
 	if (err < 0)
 		goto priv_out;
 
+	/* regulatory notifer below needs access to cfg so
+	 * assign it now.
+	 */
+	drvr->config = cfg;
+
 	brcmf_dbg(INFO, "Registering custom regulatory\n");
 	wiphy->reg_notifier = brcmf_cfg80211_reg_notifier;
 	wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
@@ -6946,13 +6941,17 @@ struct brcmf_cfg80211_info *brcmf_cfg80211_attach(struct brcmf_pub *drvr,
 		cap = &wiphy->bands[NL80211_BAND_2GHZ]->ht_cap.cap;
 		*cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 	}
+#ifdef CONFIG_PM
+	if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_WOWL_GTK))
+		ops->set_rekey_data = brcmf_cfg80211_set_rekey_data;
+#endif
 	err = wiphy_register(wiphy);
 	if (err < 0) {
 		brcmf_err("Could not register wiphy device (%d)\n", err);
 		goto priv_out;
 	}
 
-	err = brcmf_setup_wiphybands(wiphy);
+	err = brcmf_setup_wiphybands(cfg);
 	if (err) {
 		brcmf_err("Setting wiphy bands failed (%d)\n", err);
 		goto wiphy_unreg_out;
@@ -6969,12 +6968,7 @@ struct brcmf_cfg80211_info *brcmf_cfg80211_attach(struct brcmf_pub *drvr,
 		else
 			*cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 	}
-	/* p2p might require that "if-events" get processed by fweh. So
-	 * activate the already registered event handlers now and activate
-	 * the rest when initialization has completed. drvr->config needs to
-	 * be assigned before activating events.
-	 */
-	drvr->config = cfg;
+
 	err = brcmf_fweh_activate_events(ifp);
 	if (err) {
 		brcmf_err("FWEH activation failed (%d)\n", err);
@@ -7042,8 +7036,7 @@ struct brcmf_cfg80211_info *brcmf_cfg80211_attach(struct brcmf_pub *drvr,
 	ifp->vif = NULL;
 wiphy_out:
 	brcmf_free_wiphy(wiphy);
-ops_out:
-	kfree(ops);
+	kfree(cfg);
 	return NULL;
 }
 
@@ -7058,4 +7051,5 @@ void brcmf_cfg80211_detach(struct brcmf_cfg80211_info *cfg)
 	kfree(cfg->ops);
 	wl_deinit_priv(cfg);
 	brcmf_free_wiphy(cfg->wiphy);
+	kfree(cfg);
 }

drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.h

@@ -355,20 +355,24 @@ static inline struct wiphy *cfg_to_wiphy(struct brcmf_cfg80211_info *cfg)
 
 static inline struct brcmf_cfg80211_info *wiphy_to_cfg(struct wiphy *w)
 {
-	return (struct brcmf_cfg80211_info *)(wiphy_priv(w));
+	struct brcmf_pub *drvr = wiphy_priv(w);
+	return drvr->config;
 }
 
 static inline struct brcmf_cfg80211_info *wdev_to_cfg(struct wireless_dev *wd)
 {
-	return (struct brcmf_cfg80211_info *)(wdev_priv(wd));
+	return wiphy_to_cfg(wd->wiphy);
+}
+
+static inline struct brcmf_cfg80211_vif *wdev_to_vif(struct wireless_dev *wdev)
+{
+	return container_of(wdev, struct brcmf_cfg80211_vif, wdev);
 }
 
 static inline
 struct net_device *cfg_to_ndev(struct brcmf_cfg80211_info *cfg)
 {
-	struct brcmf_cfg80211_vif *vif;
-	vif = list_first_entry(&cfg->vif_list, struct brcmf_cfg80211_vif, list);
-	return vif->wdev.netdev;
+	return brcmf_get_ifp(cfg->pub, 0)->ndev;
 }
 
 static inline struct brcmf_cfg80211_info *ndev_to_cfg(struct net_device *ndev)
@@ -395,11 +399,12 @@ brcmf_cfg80211_connect_info *cfg_to_conn(struct brcmf_cfg80211_info *cfg)
 }
 
 struct brcmf_cfg80211_info *brcmf_cfg80211_attach(struct brcmf_pub *drvr,
-						  struct device *busdev,
+						  struct cfg80211_ops *ops,
 						  bool p2pdev_forced);
 void brcmf_cfg80211_detach(struct brcmf_cfg80211_info *cfg);
 s32 brcmf_cfg80211_up(struct net_device *ndev);
 s32 brcmf_cfg80211_down(struct net_device *ndev);
+struct cfg80211_ops *brcmf_cfg80211_get_ops(void);
 enum nl80211_iftype brcmf_cfg80211_get_iftype(struct brcmf_if *ifp);
 
 struct brcmf_cfg80211_vif *brcmf_alloc_vif(struct brcmf_cfg80211_info *cfg,

drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c

@@ -248,6 +248,7 @@ int brcmf_c_preinit_dcmds(struct brcmf_if *ifp)
 		brcmf_err("Retreiving cur_etheraddr failed, %d\n", err);
 		goto done;
 	}
+	memcpy(ifp->drvr->wiphy->perm_addr, ifp->drvr->mac, ETH_ALEN);
 	memcpy(ifp->drvr->mac, ifp->mac_addr, sizeof(ifp->drvr->mac));
 
 	bus = ifp->drvr->bus_if;
@@ -275,6 +276,7 @@ int brcmf_c_preinit_dcmds(struct brcmf_if *ifp)
 		ri->chippkg = le32_to_cpu(revinfo.chippkg);
 		ri->nvramrev = le32_to_cpu(revinfo.nvramrev);
 
+		/* use revinfo if not known yet */
 		if (!bus->chip) {
 			bus->chip = le32_to_cpu(revinfo.chipnum);
 			bus->chiprev = le32_to_cpu(revinfo.chiprev);

drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c

@@ -943,7 +943,7 @@ static int brcmf_revinfo_read(struct seq_file *s, void *data)
 	return 0;
 }
 
-static int brcmf_bus_started(struct brcmf_pub *drvr)
+static int brcmf_bus_started(struct brcmf_pub *drvr, struct cfg80211_ops *ops)
 {
 	int ret = -1;
 	struct brcmf_bus *bus_if = drvr->bus_if;
@@ -982,7 +982,7 @@ static int brcmf_bus_started(struct brcmf_pub *drvr)
 
 	brcmf_proto_add_if(drvr, ifp);
 
-	drvr->config = brcmf_cfg80211_attach(drvr, bus_if->dev,
+	drvr->config = brcmf_cfg80211_attach(drvr, ops,
 					     drvr->settings->p2p_enable);
 	if (drvr->config == NULL) {
 		ret = -ENOMEM;
@@ -1037,17 +1037,26 @@ static int brcmf_bus_started(struct brcmf_pub *drvr)
 
 int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings)
 {
+	struct wiphy *wiphy;
+	struct cfg80211_ops *ops;
 	struct brcmf_pub *drvr = NULL;
 	int ret = 0;
 	int i;
 
 	brcmf_dbg(TRACE, "Enter\n");
 
-	/* Allocate primary brcmf_info */
-	drvr = kzalloc(sizeof(*drvr), GFP_ATOMIC);
-	if (!drvr)
+	ops = brcmf_cfg80211_get_ops();
+	if (!ops)
 		return -ENOMEM;
 
+	wiphy = wiphy_new(ops, sizeof(*drvr));
+	if (!wiphy)
+		return -ENOMEM;
+
+	set_wiphy_dev(wiphy, dev);
+	drvr = wiphy_priv(wiphy);
+	drvr->wiphy = wiphy;
+
 	for (i = 0; i < ARRAY_SIZE(drvr->if2bss); i++)
 		drvr->if2bss[i] = BRCMF_BSSIDX_INVALID;
 
@@ -1076,15 +1085,18 @@ int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings)
 	/* attach firmware event handler */
 	brcmf_fweh_attach(drvr);
 
-	ret = brcmf_bus_started(drvr);
+	ret = brcmf_bus_started(drvr, ops);
 	if (ret != 0) {
 		brcmf_err("dongle is not responding: err=%d\n", ret);
 		goto fail;
 	}
+
+	drvr->config->ops = ops;
 	return 0;
 
 fail:
 	brcmf_detach(dev);
+	kfree(ops);
 
 	return ret;
 }
@@ -1142,14 +1154,15 @@ void brcmf_detach(struct device *dev)
 		brcmf_remove_interface(drvr->iflist[i], false);
 
 	brcmf_cfg80211_detach(drvr->config);
+	drvr->config = NULL;
 
 	brcmf_bus_stop(drvr->bus_if);
 
 	brcmf_proto_detach(drvr);
 
 	brcmf_debug_detach(drvr);
 	bus_if->drvr = NULL;
-	kfree(drvr);
+	wiphy_free(drvr->wiphy);
 }
 
 s32 brcmf_iovar_data_set(struct device *dev, char *name, void *data, u32 len)