ath9k: Setup MFP options for CCMP

Configure hardware CCMP for management frame protection and use
software crypto when needed.

Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath9k/hw.c b/drivers/net/wireless/ath9k/hw.c
index 3c026e6b2453..e9a3951996e2 100644
--- a/drivers/net/wireless/ath9k/hw.c
+++ b/drivers/net/wireless/ath9k/hw.c
@@ -2265,6 +2265,23 @@ int ath9k_hw_reset(struct ath_hal *ah, struct ath9k_channel *chan,
         if (r)
                 return r;
 
+        /* Setup MFP options for CCMP */
+        if (AR_SREV_9280_20_OR_LATER(ah)) {
+                /* Mask Retry(b11), PwrMgt(b12), MoreData(b13) to 0 in mgmt
+                 * frames when constructing CCMP AAD. */
+                REG_RMW_FIELD(ah, AR_AES_MUTE_MASK1, AR_AES_MUTE_MASK1_FC_MGMT,
+                              0xc7ff);
+                ah->sw_mgmt_crypto = false;
+        } else if (AR_SREV_9160_10_OR_LATER(ah)) {
+                /* Disable hardware crypto for management frames */
+                REG_CLR_BIT(ah, AR_PCU_MISC_MODE2,
+                            AR_PCU_MISC_MODE2_MGMT_CRYPTO_ENABLE);
+                REG_SET_BIT(ah, AR_PCU_MISC_MODE2,
+                            AR_PCU_MISC_MODE2_NO_CRYPTO_FOR_NON_DATA_PKT);
+                ah->sw_mgmt_crypto = true;
+        } else
+                ah->sw_mgmt_crypto = true;
+
         if (IS_CHAN_OFDM(chan) || IS_CHAN_HT(chan))
                 ath9k_hw_set_delta_slope(ah, chan);