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ath9k_hw: add multicast key search support 

If a MAC address for a key table entry is flagged with the
multicast bit (0x01), indicate to the hardware that multicast
lookup instead of unicast lookup should be used. The multicast
bit itself never makes it to the actual keytable entry register,
as it is shifted out.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2010-05-25 19:42:44 +02:00 committed by John W. Linville
parent fd515941cf
commit 1d0bb42d5e
1 changed files with 12 additions and 1 deletions
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13
drivers/net/wireless/ath/ath9k/hw.c
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@ -1485,6 +1485,7 @@ EXPORT_SYMBOL(ath9k_hw_keyreset);
bool ath9k_hw_keysetmac(struct ath_hw *ah, u16 entry, const u8 *mac)
{
u32 macHi, macLo;
u32 unicast_flag = AR_KEYTABLE_VALID;
if (entry >= ah->caps.keycache_size) {
ath_print(ath9k_hw_common(ah), ATH_DBG_FATAL,
@ -1493,6 +1494,16 @@ bool ath9k_hw_keysetmac(struct ath_hw *ah, u16 entry, const u8 *mac)
}
if (mac != NULL) {
/*
* AR_KEYTABLE_VALID indicates that the address is a unicast
* address, which must match the transmitter address for
* decrypting frames.
* Not setting this bit allows the hardware to use the key
* for multicast frame decryption.
*/
if (mac[0] & 0x01)
unicast_flag = 0;
macHi = (mac[5] << 8) | mac[4];
macLo = (mac[3] << 24) |
(mac[2] << 16) |
@ -1505,7 +1516,7 @@ bool ath9k_hw_keysetmac(struct ath_hw *ah, u16 entry, const u8 *mac)
macLo = macHi = 0;
}
REG_WRITE(ah, AR_KEYTABLE_MAC0(entry), macLo);
REG_WRITE(ah, AR_KEYTABLE_MAC1(entry), macHi | AR_KEYTABLE_VALID);
REG_WRITE(ah, AR_KEYTABLE_MAC1(entry), macHi | unicast_flag);
return true;
}