Commit f650470a authored by Bob Copeland's avatar Bob Copeland Committed by John W. Linville
Browse files

ath5k: enable combined michael mic in key cache 



For mac revisions >= "Griffin," the hardware allows the mic tx and rx
authenticator keys to share the same cache line, whereas earlier
hardware can only store the rx.  Enable the combined mic on hardware
that supports it.

Changes to ath5k.h
Changes-licensed-under: 3-Clause-BSD

Changes to attach.c, pcu.c, reg.h
Changes-licensed-under: ISC

Signed-off-by: default avatarBob Copeland <me@bobcopeland.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 67143490

drivers/net/wireless/ath5k/ath5k.h

+1 −0
Original line number Diff line number Diff line
@@ -1052,6 +1052,7 @@ struct ath5k_hw { 
	bool			ah_calibration;

	bool			ah_running;

	bool			ah_single_chip;

	bool			ah_combined_mic;

	enum ath5k_rfgain	ah_rf_gain;



	u32			ah_mac_srev;

drivers/net/wireless/ath5k/attach.c

+6 −0
Original line number Diff line number Diff line
@@ -317,6 +317,12 @@ struct ath5k_hw *ath5k_hw_attach(struct ath5k_softc *sc, u8 mac_version) 
		goto err_free;

	}



	if (srev >= AR5K_SREV_AR2414) {

		ah->ah_combined_mic = true;

		AR5K_REG_ENABLE_BITS(ah, AR5K_MISC_MODE,

			AR5K_MISC_MODE_COMBINED_MIC);

	}



	/* MAC address is cleared until add_interface */

	ath5k_hw_set_lladdr(ah, mac);

drivers/net/wireless/ath5k/pcu.c

+14 −14
Original line number Diff line number Diff line
@@ -1096,20 +1096,20 @@ int ath5k_hw_set_key(struct ath5k_hw *ah, u16 entry, 
		/* Install rx/tx MIC */

		rxmic = (__le32 *) &key->key[16];

		txmic = (__le32 *) &key->key[24];

#if 0

		/* MISC_MODE register & 0x04 - for mac srev >= griffin */



		if (ah->ah_combined_mic) {

			key_v[0] = rxmic[0];

			key_v[1] = (txmic[0] >> 16) & 0xffff;

			key_v[2] = rxmic[1];

			key_v[3] = txmic[0] & 0xffff;

			key_v[4] = txmic[1];

#else

		} else {

			key_v[0] = rxmic[0];

			key_v[1] = 0;

			key_v[2] = rxmic[1];

			key_v[3] = 0;

			key_v[4] = 0;

#endif

		}

		for (i = 0; i < ARRAY_SIZE(key_v); i++)

			ath5k_hw_reg_write(ah, le32_to_cpu(key_v[i]),

				AR5K_KEYTABLE_OFF(micentry, i));

drivers/net/wireless/ath5k/reg.h

+1 −0
Original line number Diff line number Diff line
@@ -1729,6 +1729,7 @@ 
#define	AR5K_MISC_MODE			0x8120			/* Register Address */

#define	AR5K_MISC_MODE_FBSSID_MATCH	0x00000001	/* Force BSSID match */

#define	AR5K_MISC_MODE_ACKSIFS_MEM	0x00000002	/* ACK SIFS memory (?) */

#define	AR5K_MISC_MODE_COMBINED_MIC	0x00000004	/* use rx/tx MIC key */

/* more bits */



/*

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