mac80211: allow configure_filter callback to sleep
Over time, a whole bunch of drivers have come up
with their own scheme to delay the configure_filter
operation to a workqueue. To be able to simplify
things, allow configure_filter to sleep, and add
a new prepare_multicast callback that drivers that
need the multicast address list implement. This new
callback must be atomic, but most drivers either
don't care or just calculate a hash which can be
done atomically and then uploaded to the hardware
non-atomically.
A cursory look suggests that at76c50x-usb, ar9170,
mwl8k (which is actually very broken now), rt2x00,
wl1251, wl1271 and zd1211 should make use of this
new capability.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/adm8211.c b/drivers/net/wireless/adm8211.c
index 5695911..b80f514 100644
--- a/drivers/net/wireless/adm8211.c
+++ b/drivers/net/wireless/adm8211.c
@@ -1328,16 +1328,39 @@
}
}
+static u64 adm8211_prepare_multicast(struct ieee80211_hw *hw,
+ int mc_count, struct dev_addr_list *mclist)
+{
+ unsigned int bit_nr, i;
+ u32 mc_filter[2];
+
+ mc_filter[1] = mc_filter[0] = 0;
+
+ for (i = 0; i < mc_count; i++) {
+ if (!mclist)
+ break;
+ bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26;
+
+ bit_nr &= 0x3F;
+ mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
+ mclist = mclist->next;
+ }
+
+ return mc_filter[0] | ((u64)(mc_filter[1]) << 32);
+}
+
static void adm8211_configure_filter(struct ieee80211_hw *dev,
unsigned int changed_flags,
unsigned int *total_flags,
- int mc_count, struct dev_mc_list *mclist)
+ u64 multicast)
{
static const u8 bcast[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
struct adm8211_priv *priv = dev->priv;
- unsigned int bit_nr, new_flags;
+ unsigned int new_flags;
u32 mc_filter[2];
- int i;
+
+ mc_filter[0] = multicast;
+ mc_filter[1] = multicast >> 32;
new_flags = 0;
@@ -1346,23 +1369,13 @@
priv->nar |= ADM8211_NAR_PR;
priv->nar &= ~ADM8211_NAR_MM;
mc_filter[1] = mc_filter[0] = ~0;
- } else if ((*total_flags & FIF_ALLMULTI) || (mc_count > 32)) {
+ } else if (*total_flags & FIF_ALLMULTI || multicast == ~(0ULL)) {
new_flags |= FIF_ALLMULTI;
priv->nar &= ~ADM8211_NAR_PR;
priv->nar |= ADM8211_NAR_MM;
mc_filter[1] = mc_filter[0] = ~0;
} else {
priv->nar &= ~(ADM8211_NAR_MM | ADM8211_NAR_PR);
- mc_filter[1] = mc_filter[0] = 0;
- for (i = 0; i < mc_count; i++) {
- if (!mclist)
- break;
- bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26;
-
- bit_nr &= 0x3F;
- mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
- mclist = mclist->next;
- }
}
ADM8211_IDLE_RX();
@@ -1757,6 +1770,7 @@
.remove_interface = adm8211_remove_interface,
.config = adm8211_config,
.bss_info_changed = adm8211_bss_info_changed,
+ .prepare_multicast = adm8211_prepare_multicast,
.configure_filter = adm8211_configure_filter,
.get_stats = adm8211_get_stats,
.get_tx_stats = adm8211_get_tx_stats,