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[PATCH] zd1211rw: Support for multicast addresses 

Support for multicast adresses is implemented by supporting the
set_multicast_list() function of the network device. Address
filtering is supported by a group hash table in the device.

This is based on earlier work by Benoit Papillaut. Fixes multicast packet
reception and ipv6 connectivity:
http://bugzilla.kernel.org/show_bug.cgi?id=7424
http://bugzilla.kernel.org/show_bug.cgi?id=7425

Signed-off-by: Ulrich Kunitz <kune@deine-taler.de>
Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ulrich Kunitz 2006-12-01 00:58:07 +00:00 committed by John W. Linville
parent ff9b99bccc
commit 9cdac9657f
5 changed files with 102 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/net/wireless/zd1211rw/zd_chip.c
View File

@ -1673,3 +1673,16 @@ int zd_rfwritev_cr_locked(struct zd_chip *chip,
return 0;
}
int zd_chip_set_multicast_hash(struct zd_chip *chip,
struct zd_mc_hash *hash)
{
struct zd_ioreq32 ioreqs[] = {
{ CR_GROUP_HASH_P1, hash->low },
{ CR_GROUP_HASH_P2, hash->high },
};
dev_dbg_f(zd_chip_dev(chip), "hash l 0x%08x h 0x%08x\n",
ioreqs[0].value, ioreqs[1].value);
return zd_iowrite32a(chip, ioreqs, ARRAY_SIZE(ioreqs));
}

43
drivers/net/wireless/zd1211rw/zd_chip.h
View File

@ -390,10 +390,19 @@
#define CR_BSSID_P1 CTL_REG(0x0618)
#define CR_BSSID_P2 CTL_REG(0x061C)
#define CR_BCN_PLCP_CFG CTL_REG(0x0620)
/* Group hash table for filtering incoming packets.
*
* The group hash table is 64 bit large and split over two parts. The first
* part is the lower part. The upper 6 bits of the last byte of the target
* address are used as index. Packets are received if the hash table bit is
* set. This is used for multicast handling, but for broadcasts (address
* ff:ff:ff:ff:ff:ff) the highest bit in the second table must also be set.
*/
#define CR_GROUP_HASH_P1 CTL_REG(0x0624)
#define CR_GROUP_HASH_P2 CTL_REG(0x0628)
#define CR_RX_TIMEOUT CTL_REG(0x062C)
#define CR_RX_TIMEOUT CTL_REG(0x062C)
/* Basic rates supported by the BSS. When producing ACK or CTS messages, the
* device will use a rate in this table that is less than or equal to the rate
* of the incoming frame which prompted the response */
@ -864,4 +873,36 @@ u8 zd_rx_strength_percent(u8 rssi);
u16 zd_rx_rate(const void *rx_frame, const struct rx_status *status);
struct zd_mc_hash {
u32 low;
u32 high;
};
static inline void zd_mc_clear(struct zd_mc_hash *hash)
{
hash->low = 0;
/* The interfaces must always received broadcasts.
* The hash of the broadcast address ff:ff:ff:ff:ff:ff is 63.
*/
hash->high = 0x80000000;
}
static inline void zd_mc_add_all(struct zd_mc_hash *hash)
{
hash->low = hash->high = 0xffffffff;
}
static inline void zd_mc_add_addr(struct zd_mc_hash *hash, u8 *addr)
{
unsigned int i = addr[5] >> 2;
if (i < 32) {
hash->low |= 1 << i;
} else {
hash->high |= 1 << (i-32);
}
}
int zd_chip_set_multicast_hash(struct zd_chip *chip,
struct zd_mc_hash *hash);
#endif /* _ZD_CHIP_H */

44
drivers/net/wireless/zd1211rw/zd_mac.c
View File

@ -39,6 +39,8 @@ static void housekeeping_init(struct zd_mac *mac);
static void housekeeping_enable(struct zd_mac *mac);
static void housekeeping_disable(struct zd_mac *mac);
static void set_multicast_hash_handler(void *mac_ptr);
int zd_mac_init(struct zd_mac *mac,
struct net_device *netdev,
struct usb_interface *intf)
@ -55,6 +57,8 @@ int zd_mac_init(struct zd_mac *mac,
softmac_init(ieee80211_priv(netdev));
zd_chip_init(&mac->chip, netdev, intf);
housekeeping_init(mac);
INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler,
mac);
return 0;
}
@ -136,6 +140,7 @@ out:
void zd_mac_clear(struct zd_mac *mac)
{
flush_workqueue(zd_workqueue);
zd_chip_clear(&mac->chip);
ZD_ASSERT(!spin_is_locked(&mac->lock));
ZD_MEMCLEAR(mac, sizeof(struct zd_mac));
@ -256,6 +261,42 @@ int zd_mac_set_mac_address(struct net_device *netdev, void *p)
return 0;
}
static void set_multicast_hash_handler(void *mac_ptr)
{
struct zd_mac *mac = mac_ptr;
struct zd_mc_hash hash;
spin_lock_irq(&mac->lock);
hash = mac->multicast_hash;
spin_unlock_irq(&mac->lock);
zd_chip_set_multicast_hash(&mac->chip, &hash);
}
void zd_mac_set_multicast_list(struct net_device *dev)
{
struct zd_mc_hash hash;
struct zd_mac *mac = zd_netdev_mac(dev);
struct dev_mc_list *mc;
unsigned long flags;
if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) {
zd_mc_add_all(&hash);
} else {
zd_mc_clear(&hash);
for (mc = dev->mc_list; mc; mc = mc->next) {
dev_dbg_f(zd_mac_dev(mac), "mc addr " MAC_FMT "\n",
MAC_ARG(mc->dmi_addr));
zd_mc_add_addr(&hash, mc->dmi_addr);
}
}
spin_lock_irqsave(&mac->lock, flags);
mac->multicast_hash = hash;
spin_unlock_irqrestore(&mac->lock, flags);
queue_work(zd_workqueue, &mac->set_multicast_hash_work);
}
int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain)
{
int r;
@ -930,7 +971,8 @@ static int is_data_packet_for_us(struct ieee80211_device *ieee,
}
return memcmp(hdr->addr1, netdev->dev_addr, ETH_ALEN) == 0 ||
is_multicast_ether_addr(hdr->addr1) ||
(is_multicast_ether_addr(hdr->addr1) &&
memcmp(hdr->addr3, netdev->dev_addr, ETH_ALEN) != 0) ||
(netdev->flags & IFF_PROMISC);
}

3
drivers/net/wireless/zd1211rw/zd_mac.h
View File

@ -133,6 +133,8 @@ struct zd_mac {
struct iw_statistics iw_stats;
struct housekeeping housekeeping;
struct work_struct set_multicast_hash_work;
struct zd_mc_hash multicast_hash;
struct work_struct set_rts_cts_work;
struct work_struct set_basic_rates_work;
@ -189,6 +191,7 @@ int zd_mac_init_hw(struct zd_mac *mac, u8 device_type);
int zd_mac_open(struct net_device *netdev);
int zd_mac_stop(struct net_device *netdev);
int zd_mac_set_mac_address(struct net_device *dev, void *p);
void zd_mac_set_multicast_list(struct net_device *netdev);
int zd_mac_rx(struct zd_mac *mac, const u8 *buffer, unsigned int length);

2
drivers/net/wireless/zd1211rw/zd_netdev.c
View File

@ -242,7 +242,7 @@ struct net_device *zd_netdev_alloc(struct usb_interface *intf)
netdev->open = zd_mac_open;
netdev->stop = zd_mac_stop;
/* netdev->get_stats = */
/* netdev->set_multicast_list = */
netdev->set_multicast_list = zd_mac_set_multicast_list;
netdev->set_mac_address = zd_mac_set_mac_address;
netdev->wireless_handlers = &iw_handler_def;
/* netdev->ethtool_ops = */