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Commit 44129ed0 authored by Franky Lin's avatar Franky Lin Committed by Kalle Valo
Browse files

brcmfmac: add arp offload ip address table configuration support 



Obtain ipv4 address through inetaddr notification for ARP offload host
ip table configuration.

Reviewed-by: default avatarArend Van Spriel <arend@broadcom.com>
Reviewed-by: default avatarPieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: default avatarHante Meuleman <meuleman@broadcom.com>
Signed-off-by: default avatarFranky Lin <frankyl@broadcom.com>
Signed-off-by: default avatarArend van Spriel <arend@broadcom.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent f7b7caa4

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

+108 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <linux/kernel.h>

#include <linux/etherdevice.h>

#include <linux/module.h>

#include <linux/inetdevice.h>

#include <net/cfg80211.h>

#include <net/rtnetlink.h>

#include <brcmu_utils.h>
@@ -620,6 +621,8 @@ static int brcmf_netdev_stop(struct net_device *ndev) 


	brcmf_cfg80211_down(ndev);



	brcmf_fil_iovar_data_set(ifp, "arp_hostip_clear", NULL, 0);



	brcmf_net_setcarrier(ifp, false);



	return 0;
@@ -940,6 +943,98 @@ int brcmf_get_next_free_bsscfgidx(struct brcmf_pub *drvr) 
	return available ? bsscfgidx : -ENOMEM;

}



#ifdef CONFIG_INET

#define ARPOL_MAX_ENTRIES	8

static int brcmf_inetaddr_changed(struct notifier_block *nb,

				  unsigned long action, void *data)

{

	struct brcmf_pub *drvr = container_of(nb, struct brcmf_pub,

					      inetaddr_notifier);

	struct in_ifaddr *ifa = data;

	struct net_device *ndev = ifa->ifa_dev->dev;

	struct brcmf_if *ifp;

	int idx, i, ret;

	u32 val;

	__be32 addr_table[ARPOL_MAX_ENTRIES] = {0};



	/* Find out if the notification is meant for us */

	for (idx = 0; idx < BRCMF_MAX_IFS; idx++) {

		ifp = drvr->iflist[idx];

		if (ifp && ifp->ndev == ndev)

			break;

		if (idx == BRCMF_MAX_IFS - 1)

			return NOTIFY_DONE;

	}



	/* check if arp offload is supported */

	ret = brcmf_fil_iovar_int_get(ifp, "arpoe", &val);

	if (ret)

		return NOTIFY_OK;



	/* old version only support primary index */

	ret = brcmf_fil_iovar_int_get(ifp, "arp_version", &val);

	if (ret)

		val = 1;

	if (val == 1)

		ifp = drvr->iflist[0];



	/* retrieve the table from firmware */

	ret = brcmf_fil_iovar_data_get(ifp, "arp_hostip", addr_table,

				       sizeof(addr_table));

	if (ret) {

		brcmf_err("fail to get arp ip table err:%d\n", ret);

		return NOTIFY_OK;

	}



	for (i = 0; i < ARPOL_MAX_ENTRIES; i++)

		if (ifa->ifa_address == addr_table[i])

			break;



	switch (action) {

	case NETDEV_UP:

		if (i == ARPOL_MAX_ENTRIES) {

			brcmf_dbg(TRACE, "add %pI4 to arp table\n",

				  &ifa->ifa_address);

			/* set it directly */

			ret = brcmf_fil_iovar_data_set(ifp, "arp_hostip",

				&ifa->ifa_address, sizeof(ifa->ifa_address));

			if (ret)

				brcmf_err("add arp ip err %d\n", ret);

		}

		break;

	case NETDEV_DOWN:

		if (i < ARPOL_MAX_ENTRIES) {

			addr_table[i] = 0;

			brcmf_dbg(TRACE, "remove %pI4 from arp table\n",

				  &ifa->ifa_address);

			/* clear the table in firmware */

			ret = brcmf_fil_iovar_data_set(ifp, "arp_hostip_clear",

						       NULL, 0);

			if (ret) {

				brcmf_err("fail to clear arp ip table err:%d\n",

					  ret);

				return NOTIFY_OK;

			}

			for (i = 0; i < ARPOL_MAX_ENTRIES; i++) {

				if (addr_table[i] != 0) {

					brcmf_fil_iovar_data_set(ifp,

						"arp_hostip", &addr_table[i],

						sizeof(addr_table[i]));

					if (ret)

						brcmf_err("add arp ip err %d\n",

							  ret);

				}

			}

		}

		break;

	default:

		break;

	}



	return NOTIFY_OK;

}

#endif



int brcmf_attach(struct device *dev)

{

	struct brcmf_pub *drvr = NULL;
@@ -1068,6 +1163,15 @@ int brcmf_bus_start(struct device *dev) 
		if (p2p_ifp)

			ret = brcmf_net_p2p_attach(p2p_ifp);

	}



	if (ret)

		goto fail;



#ifdef CONFIG_INET

	drvr->inetaddr_notifier.notifier_call = brcmf_inetaddr_changed;

	ret = register_inetaddr_notifier(&drvr->inetaddr_notifier);

#endif



fail:

	if (ret < 0) {

		brcmf_err("failed: %d\n", ret);
@@ -1133,6 +1237,10 @@ void brcmf_detach(struct device *dev) 
	if (drvr == NULL)

		return;



#ifdef CONFIG_INET

	unregister_inetaddr_notifier(&drvr->inetaddr_notifier);

#endif



	/* stop firmware event handling */

	brcmf_fweh_detach(drvr);

	if (drvr->config)

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

+2 −0
Original line number Diff line number Diff line
@@ -141,6 +141,8 @@ struct brcmf_pub { 
#ifdef DEBUG

	struct dentry *dbgfs_dir;

#endif



	struct notifier_block inetaddr_notifier;

};



/* forward declarations */