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iwlwifi: mvm: support new station key API 

The new version 3 of the station key API has gotten rid of the
strange hole in the sequence counter values, support that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210802215208.39a00ca1a1a6.Ifb4adeb4edd2b72232046dd2d59c0b3732f497c2@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Johannes Berg 2021-08-02 21:58:55 +03:00 committed by Luca Coelho
parent 35fc5feca7
commit 199d895f47
2 changed files with 23 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/wireless/intel/iwlwifi/fw/api/sta.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/*
* Copyright (C) 2012-2014, 2018-2020 Intel Corporation
* Copyright (C) 2012-2014, 2018-2021 Intel Corporation
* Copyright (C) 2013-2014 Intel Mobile Communications GmbH
* Copyright (C) 2016-2017 Intel Deutschland GmbH
*/
@ -384,13 +384,17 @@ struct iwl_mvm_add_sta_key_cmd_v1 {
* @rx_mic_key: TKIP RX unicast or multicast key
* @tx_mic_key: TKIP TX key
* @transmit_seq_cnt: TSC, transmit packet number
*
* Note: This is used for both v2 and v3, the difference being
* in the way the common.rx_secur_seq_cnt is used, in v2 that's
* the strange hole format, in v3 it's just a u64.
*/
struct iwl_mvm_add_sta_key_cmd {
struct iwl_mvm_add_sta_key_common common;
__le64 rx_mic_key;
__le64 tx_mic_key;
__le64 transmit_seq_cnt;
} __packed; /* ADD_MODIFY_STA_KEY_API_S_VER_2 */
} __packed; /* ADD_MODIFY_STA_KEY_API_S_VER_2, ADD_MODIFY_STA_KEY_API_S_VER_3 */
/**
* enum iwl_mvm_add_sta_rsp_status - status in the response to ADD_STA command

31
drivers/net/wireless/intel/iwlwifi/mvm/sta.c
View File

@ -3228,6 +3228,9 @@ static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
int i, size;
bool new_api = fw_has_api(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
int api_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP,
ADD_STA_KEY,
new_api ? 2 : 1);
if (sta_id == IWL_MVM_INVALID_STA)
return -EINVAL;
@ -3240,7 +3243,7 @@ static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
switch (key->cipher) {
case WLAN_CIPHER_SUITE_TKIP:
key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
if (new_api) {
if (api_ver >= 2) {
memcpy((void *)&u.cmd.tx_mic_key,
&key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
IWL_MIC_KEY_SIZE);
@ -3261,7 +3264,7 @@ static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
case WLAN_CIPHER_SUITE_CCMP:
key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
memcpy(u.cmd.common.key, key->key, key->keylen);
if (new_api)
if (api_ver >= 2)
pn = atomic64_read(&key->tx_pn);
break;
case WLAN_CIPHER_SUITE_WEP104:
@ -3277,7 +3280,7 @@ static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
case WLAN_CIPHER_SUITE_GCMP:
key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
memcpy(u.cmd.common.key, key->key, key->keylen);
if (new_api)
if (api_ver >= 2)
pn = atomic64_read(&key->tx_pn);
break;
default:
@ -3303,28 +3306,28 @@ static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
struct ieee80211_key_seq seq = {};
u8 _rx_pn[IEEE80211_MAX_PN_LEN] = {}, *rx_pn = _rx_pn;
int rx_pn_len = 8;
/* there's a hole at 2/3 in FW format depending on version */
int hole = api_ver >= 3 ? 0 : 2;
ieee80211_get_key_rx_seq(key, i, &seq);
if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
rx_pn[0] = seq.tkip.iv16;
rx_pn[1] = seq.tkip.iv16 >> 8;
/* hole at 2/3 in FW format */
rx_pn[4] = seq.tkip.iv32;
rx_pn[5] = seq.tkip.iv32 >> 8;
rx_pn[6] = seq.tkip.iv32 >> 16;
rx_pn[7] = seq.tkip.iv32 >> 24;
rx_pn[2 + hole] = seq.tkip.iv32;
rx_pn[3 + hole] = seq.tkip.iv32 >> 8;
rx_pn[4 + hole] = seq.tkip.iv32 >> 16;
rx_pn[5 + hole] = seq.tkip.iv32 >> 24;
} else if (key_flags & cpu_to_le16(STA_KEY_FLG_EXT)) {
rx_pn = seq.hw.seq;
rx_pn_len = seq.hw.seq_len;
} else {
rx_pn[0] = seq.ccmp.pn[0];
rx_pn[1] = seq.ccmp.pn[1];
/* hole at 2/3 in FW format */
rx_pn[4] = seq.ccmp.pn[2];
rx_pn[5] = seq.ccmp.pn[3];
rx_pn[6] = seq.ccmp.pn[4];
rx_pn[7] = seq.ccmp.pn[5];
rx_pn[2 + hole] = seq.ccmp.pn[2];
rx_pn[3 + hole] = seq.ccmp.pn[3];
rx_pn[4 + hole] = seq.ccmp.pn[4];
rx_pn[5 + hole] = seq.ccmp.pn[5];
}
if (iwl_mvm_pn_cmp(rx_pn, (u8 *)&u.cmd.common.rx_secur_seq_cnt,
@ -3333,7 +3336,7 @@ static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
rx_pn_len);
}
if (new_api) {
if (api_ver >= 2) {
u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
size = sizeof(u.cmd);
} else {