- 根目录:
- drivers
- net
- wireless
- iwlwifi
- mvm
- d3.c
/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/
#include <linux/etherdevice.h>
#include <linux/ip.h>
#include <net/cfg80211.h>
#include <net/ipv6.h>
#include <net/tcp.h>
#include "iwl-modparams.h"
#include "fw-api.h"
#include "mvm.h"
void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct cfg80211_gtk_rekey_data *data)
{
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (iwlwifi_mod_params.sw_crypto)
return;
mutex_lock(&mvm->mutex);
memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
mvmvif->rekey_data.replay_ctr =
cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
mvmvif->rekey_data.valid = true;
mutex_unlock(&mvm->mutex);
}
#if IS_ENABLED(CONFIG_IPV6)
void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct inet6_dev *idev)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct inet6_ifaddr *ifa;
int idx = 0;
read_lock_bh(&idev->lock);
list_for_each_entry(ifa, &idev->addr_list, if_list) {
mvmvif->target_ipv6_addrs[idx] = ifa->addr;
idx++;
if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS)
break;
}
read_unlock_bh(&idev->lock);
mvmvif->num_target_ipv6_addrs = idx;
}
#endif
void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
struct ieee80211_vif *vif, int idx)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
mvmvif->tx_key_idx = idx;
}
static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
{
int i;
for (i = 0; i < IWL_P1K_SIZE; i++)
out[i] = cpu_to_le16(p1k[i]);
}
struct wowlan_key_data {
struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
struct iwl_wowlan_tkip_params_cmd *tkip;
bool error, use_rsc_tsc, use_tkip;
int gtk_key_idx;
};
static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *key,
void *_data)
{
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct wowlan_key_data *data = _data;
struct aes_sc *aes_sc, *aes_tx_sc = NULL;
struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
struct iwl_p1k_cache *rx_p1ks;
u8 *rx_mic_key;
struct ieee80211_key_seq seq;
u32 cur_rx_iv32 = 0;
u16 p1k[IWL_P1K_SIZE];
int ret, i;
mutex_lock(&mvm->mutex);
switch (key->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
struct {
struct iwl_mvm_wep_key_cmd wep_key_cmd;
struct iwl_mvm_wep_key wep_key;
} __packed wkc = {
.wep_key_cmd.mac_id_n_color =
cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
mvmvif->color)),
.wep_key_cmd.num_keys = 1,
/* firmware sets STA_KEY_FLG_WEP_13BYTES */
.wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
.wep_key.key_index = key->keyidx,
.wep_key.key_size = key->keylen,
};
/*
* This will fail -- the key functions don't set support
* pairwise WEP keys. However, that's better than silently
* failing WoWLAN. Or maybe not?
*/
if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
break;
memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
if (key->keyidx == mvmvif->tx_key_idx) {
/* TX key must be at offset 0 */
wkc.wep_key.key_offset = 0;
} else {
/* others start at 1 */
data->gtk_key_idx++;
wkc.wep_key.key_offset = data->gtk_key_idx;
}
ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, CMD_SYNC,
sizeof(wkc), &wkc);
data->error = ret != 0;
mvm->ptk_ivlen = key->iv_len;
mvm->ptk_icvlen = key->icv_len;
mvm->gtk_ivlen = key->iv_len;
mvm->gtk_icvlen = key->icv_len;
/* don't upload key again */
goto out_unlock;
}
default:
data->error = true;
goto out_unlock;
case WLAN_CIPHER_SUITE_AES_CMAC:
/*
* Ignore CMAC keys -- the WoWLAN firmware doesn't support them
* but we also shouldn't abort suspend due to that. It does have
* support for the IGTK key renewal, but doesn't really use the
* IGTK for anything. This means we could spuriously wake up or
* be deauthenticated, but that was considered acceptable.
*/
goto out_unlock;
case WLAN_CIPHER_SUITE_TKIP:
if (sta) {
tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
rx_p1ks = data->tkip->rx_uni;
ieee80211_get_key_tx_seq(key, &seq);
tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
memcpy(data->tkip->mic_keys.tx,
&key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
IWL_MIC_KEY_SIZE);
rx_mic_key = data->tkip->mic_keys.rx_unicast;
} else {
tkip_sc =
data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
rx_p1ks = data->tkip->rx_multi;
rx_mic_key = data->tkip->mic_keys.rx_mcast;
}
/*
* For non-QoS this relies on the fact that both the uCode and
* mac80211 use TID 0 (as they need to to avoid replay attacks)
* for checking the IV in the frames.
*/
for (i = 0; i < IWL_NUM_RSC; i++) {
ieee80211_get_key_rx_seq(key, i, &seq);
tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
/* wrapping isn't allowed, AP must rekey */
if (seq.tkip.iv32 > cur_rx_iv32)
cur_rx_iv32 = seq.tkip.iv32;
}
ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
cur_rx_iv32, p1k);
iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
cur_rx_iv32 + 1, p1k);
iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
memcpy(rx_mic_key,
&key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
IWL_MIC_KEY_SIZE);
data->use_tkip = true;
data->use_rsc_tsc = true;
break;
case WLAN_CIPHER_SUITE_CCMP:
if (sta) {
u8 *pn = seq.ccmp.pn;
aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
ieee80211_get_key_tx_seq(key, &seq);
aes_tx_sc->pn = cpu_to_le64((u64)pn[5] |
((u64)pn[4] << 8) |
((u64)pn[3] << 16) |
((u64)pn[2] << 24) |
((u64)pn[1] << 32) |
((u64)pn[0] << 40));
} else {
aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
}
/*
* For non-QoS this relies on the fact that both the uCode and
* mac80211 use TID 0 for checking the IV in the frames.
*/
for (i = 0; i < IWL_NUM_RSC; i++) {
u8 *pn = seq.ccmp.pn;
ieee80211_get_key_rx_seq(key, i, &seq);
aes_sc->pn = cpu_to_le64((u64)pn[5] |
((u64)pn[4] << 8) |
((u64)pn[3] << 16) |
((u64)pn[2] << 24) |
((u64)pn[1] << 32) |
((u64)pn[0] << 40));
}
data->use_rsc_tsc = true;
break;
}
/*
* The D3 firmware hardcodes the key offset 0 as the key it uses
* to transmit packets to the AP, i.e. the PTK.
*/
if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
key->hw_key_idx = 0;
mvm->ptk_ivlen = key->iv_len;
mvm->ptk_icvlen = key->icv_len;
} else {
data->gtk_key_idx++;
key->hw_key_idx = data->gtk_key_idx;
mvm->gtk_ivlen = key->iv_len;
mvm->gtk_icvlen = key->icv_len;
}
ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
data->error = ret != 0;
out_unlock:
mutex_unlock(&mvm->mutex);
}
static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
struct cfg80211_wowlan *wowlan)
{
struct iwl_wowlan_patterns_cmd *pattern_cmd;
struct iwl_host_cmd cmd = {
.id = WOWLAN_PATTERNS,
.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
.flags = CMD_SYNC,
};
int i, err;
if (!wowlan->n_patterns)
return 0;
cmd.len[0] = sizeof(*pattern_cmd) +
wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
if (!pattern_cmd)
return -ENOMEM;
pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
for (i = 0; i < wowlan->n_patterns; i++) {
int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
memcpy(&pattern_cmd->patterns[i].mask,
wowlan->patterns[i].mask, mask_len);
memcpy(&pattern_cmd->patterns[i].pattern,
wowlan->patterns[i].pattern,
wowlan->patterns[i].pattern_len);
pattern_cmd->patterns[i].mask_size = mask_len;
pattern_cmd->patterns[i].pattern_size =
wowlan->patterns[i].pattern_len;
}
cmd.data[0] = pattern_cmd;
err = iwl_mvm_send_cmd(mvm, &cmd);
kfree(pattern_cmd);
return err;
}
static int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
struct ieee80211_vif *vif)
{
struct iwl_proto_offload_cmd cmd = {};
#if IS_ENABLED(CONFIG_IPV6)
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
int i;
if (mvmvif->num_target_ipv6_addrs) {
cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_NS);
memcpy(cmd.ndp_mac_addr, vif->addr, ETH_ALEN);
}
BUILD_BUG_ON(sizeof(cmd.target_ipv6_addr[i]) !=
sizeof(mvmvif->target_ipv6_addrs[i]));
for (i = 0; i < mvmvif->num_target_ipv6_addrs; i++)
memcpy(cmd.target_ipv6_addr[i],
&mvmvif->target_ipv6_addrs[i],
sizeof(cmd.target_ipv6_addr[i]));
#endif
if (vif->bss_conf.arp_addr_cnt) {
cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_ARP);
cmd.host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
memcpy(cmd.arp_mac_addr, vif->addr, ETH_ALEN);
}
if (!cmd.enabled)
return 0;
return iwl_mvm_send_cmd_pdu(mvm, PROT_OFFLOAD_CONFIG_CMD, CMD_SYNC,
sizeof(cmd), &cmd);
}
enum iwl_mvm_tcp_packet_type {
MVM_TCP_TX_SYN,
MVM_TCP_RX_SYNACK,
MVM_TCP_TX_DATA,
MVM_TCP_RX_ACK,
MVM_TCP_RX_WAKE,
MVM_TCP_TX_FIN,
};
static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
{
__sum16 check = tcp_v4_check(len, saddr, daddr, 0);
return cpu_to_le16(be16_to_cpu((__force __be16)check));
}
static void iwl_mvm_build_tcp_packet(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct cfg80211_wowlan_tcp *tcp,
void *_pkt, u8 *mask,
__le16 *pseudo_hdr_csum,
enum iwl_mvm_tcp_packet_type ptype)
{
struct {
struct ethhdr eth;
struct iphdr ip;
struct tcphdr tcp;
u8 data[];
} __packed *pkt = _pkt;
u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
int i;
pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
pkt->ip.version = 4;
pkt->ip.ihl = 5;
pkt->ip.protocol = IPPROTO_TCP;
switch (ptype) {
case MVM_TCP_TX_SYN:
case MVM_TCP_TX_DATA:
case MVM_TCP_TX_FIN:
memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
pkt->ip.ttl = 128;
pkt->ip.saddr = tcp->src;
pkt->ip.daddr = tcp->dst;
pkt->tcp.source = cpu_to_be16(tcp->src_port);
pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
/* overwritten for TX SYN later */
pkt->tcp.doff = sizeof(struct tcphdr) / 4;
pkt->tcp.window = cpu_to_be16(65000);
break;
case MVM_TCP_RX_SYNACK:
case MVM_TCP_RX_ACK:
case MVM_TCP_RX_WAKE:
memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
pkt->ip.saddr = tcp->dst;
pkt->ip.daddr = tcp->src;
pkt->tcp.source = cpu_to_be16(tcp->dst_port);
pkt->tcp.dest = cpu_to_be16(tcp->src_port);
break;
default:
WARN_ON(1);
return;
}
switch (ptype) {
case MVM_TCP_TX_SYN:
/* firmware assumes 8 option bytes - 8 NOPs for now */
memset(pkt->data, 0x01, 8);
ip_tot_len += 8;
pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
pkt->tcp.syn = 1;
break;
case MVM_TCP_TX_DATA:
ip_tot_len += tcp->payload_len;
memcpy(pkt->data, tcp->payload, tcp->payload_len);
pkt->tcp.psh = 1;
pkt->tcp.ack = 1;
break;
case MVM_TCP_TX_FIN:
pkt->tcp.fin = 1;
pkt->tcp.ack = 1;
break;
case MVM_TCP_RX_SYNACK:
pkt->tcp.syn = 1;
pkt->tcp.ack = 1;
break;
case MVM_TCP_RX_ACK:
pkt->tcp.ack = 1;
break;
case MVM_TCP_RX_WAKE:
ip_tot_len += tcp->wake_len;
pkt->tcp.psh = 1;
pkt->tcp.ack = 1;
memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
break;
}
switch (ptype) {
case MVM_TCP_TX_SYN:
case MVM_TCP_TX_DATA:
case MVM_TCP_TX_FIN:
pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
break;
case MVM_TCP_RX_WAKE:
for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
u8 tmp = tcp->wake_mask[i];
mask[i + 6] |= tmp << 6;
if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
mask[i + 7] = tmp >> 2;
}
/* fall through for ethernet/IP/TCP headers mask */
case MVM_TCP_RX_SYNACK:
case MVM_TCP_RX_ACK:
mask[0] = 0xff; /* match ethernet */
/*
* match ethernet, ip.version, ip.ihl
* the ip.ihl half byte is really masked out by firmware
*/
mask[1] = 0x7f;
mask[2] = 0x80; /* match ip.protocol */
mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
mask[5] = 0x80; /* match tcp flags */
/* leave rest (0 or set for MVM_TCP_RX_WAKE) */
break;
};
*pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
pkt->ip.saddr, pkt->ip.daddr);
}
static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct cfg80211_wowlan_tcp *tcp)
{
struct iwl_wowlan_remote_wake_config *cfg;
struct iwl_host_cmd cmd = {
.id = REMOTE_WAKE_CONFIG_CMD,
.len = { sizeof(*cfg), },
.dataflags = { IWL_HCMD_DFL_NOCOPY, },
.flags = CMD_SYNC,
};
int ret;
if (!tcp)
return 0;
cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
if (!cfg)
return -ENOMEM;
cmd.data[0] = cfg;
cfg->max_syn_retries = 10;
cfg->max_data_retries = 10;
cfg->tcp_syn_ack_timeout = 1; /* seconds */
cfg->tcp_ack_timeout = 1; /* seconds */
/* SYN (TX) */
iwl_mvm_build_tcp_packet(
mvm, vif, tcp, cfg->syn_tx.data, NULL,
&cfg->syn_tx.info.tcp_pseudo_header_checksum,
MVM_TCP_TX_SYN);
cfg->syn_tx.info.tcp_payload_length = 0;
/* SYN/ACK (RX) */
iwl_mvm_build_tcp_packet(
mvm, vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
&cfg->synack_rx.info.tcp_pseudo_header_checksum,
MVM_TCP_RX_SYNACK);
cfg->synack_rx.info.tcp_payload_length = 0;
/* KEEPALIVE/ACK (TX) */
iwl_mvm_build_tcp_packet(
mvm, vif, tcp, cfg->keepalive_tx.data, NULL,
&cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
MVM_TCP_TX_DATA);
cfg->keepalive_tx.info.tcp_payload_length =
cpu_to_le16(tcp->payload_len);
cfg->sequence_number_offset = tcp->payload_seq.offset;
/* length must be 0..4, the field is little endian */
cfg->sequence_number_length = tcp->payload_seq.len;
cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
if (tcp->payload_tok.len) {
cfg->token_offset = tcp->payload_tok.offset;
cfg->token_length = tcp->payload_tok.len;
cfg->num_tokens =
cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
memcpy(cfg->tokens, tcp->payload_tok.token_stream,
tcp->tokens_size);
} else {
/* set tokens to max value to almost never run out */
cfg->num_tokens = cpu_to_le16(65535);
}
/* ACK (RX) */
iwl_mvm_build_tcp_packet(
mvm, vif, tcp, cfg->keepalive_ack_rx.data,
cfg->keepalive_ack_rx.rx_mask,
&cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
MVM_TCP_RX_ACK);
cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
/* WAKEUP (RX) */
iwl_mvm_build_tcp_packet(
mvm, vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
&cfg->wake_rx.info.tcp_pseudo_header_checksum,
MVM_TCP_RX_WAKE);
cfg->wake_rx.info.tcp_payload_length =
cpu_to_le16(tcp->wake_len);
/* FIN */
iwl_mvm_build_tcp_packet(
mvm, vif, tcp, cfg->fin_tx.data, NULL,
&cfg->fin_tx.info.tcp_pseudo_header_checksum,
MVM_TCP_TX_FIN);
cfg->fin_tx.info.tcp_payload_length = 0;
ret = iwl_mvm_send_cmd(mvm, &cmd);
kfree(cfg);
return ret;
}
struct iwl_d3_iter_data {
struct iwl_mvm *mvm;
struct ieee80211_vif *vif;
bool error;
};
static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_d3_iter_data *data = _data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
return;
if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
return;
if (data->vif) {
IWL_ERR(data->mvm, "More than one managed interface active!\n");
data->error = true;
return;
}
data->vif = vif;
}
static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
struct ieee80211_sta *ap_sta)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct ieee80211_chanctx_conf *ctx;
u8 chains_static, chains_dynamic;
struct cfg80211_chan_def chandef;
int ret, i;
struct iwl_binding_cmd binding_cmd = {};
struct iwl_time_quota_cmd quota_cmd = {};
u32 status;
/* add back the PHY */
if (WARN_ON(!mvmvif->phy_ctxt))
return -EINVAL;
rcu_read_lock();
ctx = rcu_dereference(vif->chanctx_conf);
if (WARN_ON(!ctx)) {
rcu_read_unlock();
return -EINVAL;
}
chandef = ctx->def;
chains_static = ctx->rx_chains_static;
chains_dynamic = ctx->rx_chains_dynamic;
rcu_read_unlock();
ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
chains_static, chains_dynamic);
if (ret)
return ret;
/* add back the MAC */
mvmvif->uploaded = false;
if (WARN_ON(!vif->bss_conf.assoc))
return -EINVAL;
/* hack */
vif->bss_conf.assoc = false;
ret = iwl_mvm_mac_ctxt_add(mvm, vif);
vif->bss_conf.assoc = true;
if (ret)
return ret;
/* add back binding - XXX refactor? */
binding_cmd.id_and_color =
cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
mvmvif->phy_ctxt->color));
binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
binding_cmd.phy =
cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
mvmvif->phy_ctxt->color));
binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
mvmvif->color));
for (i = 1; i < MAX_MACS_IN_BINDING; i++)
binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
status = 0;
ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
sizeof(binding_cmd), &binding_cmd,
&status);
if (ret) {
IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
return ret;
}
if (status) {
IWL_ERR(mvm, "Binding command failed: %u\n", status);
return -EIO;
}
ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
if (ret)
return ret;
rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
if (ret)
return ret;
/* and some quota */
quota_cmd.quotas[0].id_and_color =
cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
mvmvif->phy_ctxt->color));
quota_cmd.quotas[0].quota = cpu_to_le32(100);
quota_cmd.quotas[0].max_duration = cpu_to_le32(1000);
for (i = 1; i < MAX_BINDINGS; i++)
quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
sizeof(quota_cmd), "a_cmd);
if (ret)
IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
return 0;
}
int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
{
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
struct iwl_d3_iter_data suspend_iter_data = {
.mvm = mvm,
};
struct ieee80211_vif *vif;
struct iwl_mvm_vif *mvmvif;
struct ieee80211_sta *ap_sta;
struct iwl_mvm_sta *mvm_ap_sta;
struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
struct iwl_d3_manager_config d3_cfg_cmd = {
/*
* Program the minimum sleep time to 10 seconds, as many
* platforms have issues processing a wakeup signal while
* still being in the process of suspending.
*/
.min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
};
struct wowlan_key_data key_data = {
.use_rsc_tsc = false,
.tkip = &tkip_cmd,
.use_tkip = false,
};
int ret, i;
u16 seq;
u8 old_aux_sta_id, old_ap_sta_id = IWL_MVM_STATION_COUNT;
if (WARN_ON(!wowlan))
return -EINVAL;
key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
if (!key_data.rsc_tsc)
return -ENOMEM;
mutex_lock(&mvm->mutex);
old_aux_sta_id = mvm->aux_sta.sta_id;
/* see if there's only a single BSS vif and it's associated */
ieee80211_iterate_active_interfaces_atomic(
mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_d3_iface_iterator, &suspend_iter_data);
if (suspend_iter_data.error || !suspend_iter_data.vif) {
ret = 1;
goto out_noreset;
}
vif = suspend_iter_data.vif;
mvmvif = iwl_mvm_vif_from_mac80211(vif);
ap_sta = rcu_dereference_protected(
mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
lockdep_is_held(&mvm->mutex));
if (IS_ERR_OR_NULL(ap_sta)) {
ret = -EINVAL;
goto out_noreset;
}
mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
/*
* The D3 firmware still hardcodes the AP station ID for the
* BSS we're associated with as 0. Store the real STA ID here
* and assign 0. When we leave this function, we'll restore
* the original value for the resume code.
*/
old_ap_sta_id = mvm_ap_sta->sta_id;
mvm_ap_sta->sta_id = 0;
mvmvif->ap_sta_id = 0;
/* TODO: wowlan_config_cmd.wowlan_ba_teardown_tids */
wowlan_config_cmd.is_11n_connection = ap_sta->ht_cap.ht_supported;
/*
* We know the last used seqno, and the uCode expects to know that
* one, it will increment before TX.
*/
seq = mvm_ap_sta->last_seq_ctl & IEEE80211_SCTL_SEQ;
wowlan_config_cmd.non_qos_seq = cpu_to_le16(seq);
/*
* For QoS counters, we store the one to use next, so subtract 0x10
* since the uCode will add 0x10 *before* using the value while we
* increment after using the value (i.e. store the next value to use).
*/
for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
seq = mvm_ap_sta->tid_data[i].seq_number;
seq -= 0x10;
wowlan_config_cmd.qos_seq[i] = cpu_to_le16(seq);
}
if (wowlan->disconnect)
wowlan_config_cmd.wakeup_filter |=
cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
IWL_WOWLAN_WAKEUP_LINK_CHANGE);
if (wowlan->magic_pkt)
wowlan_config_cmd.wakeup_filter |=
cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
if (wowlan->gtk_rekey_failure)
wowlan_config_cmd.wakeup_filter |=
cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
if (wowlan->eap_identity_req)
wowlan_config_cmd.wakeup_filter |=
cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
if (wowlan->four_way_handshake)
wowlan_config_cmd.wakeup_filter |=
cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
if (wowlan->n_patterns)
wowlan_config_cmd.wakeup_filter |=
cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
if (wowlan->rfkill_release)
wowlan_config_cmd.wakeup_filter |=
cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
if (wowlan->tcp) {
/*
* Set the "link change" (really "link lost") flag as well
* since that implies losing the TCP connection.
*/
wowlan_config_cmd.wakeup_filter |=
cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
IWL_WOWLAN_WAKEUP_LINK_CHANGE);
}
iwl_mvm_cancel_scan(mvm);
iwl_trans_stop_device(mvm->trans);
/*
* Set the HW restart bit -- this is mostly true as we're
* going to load new firmware and reprogram that, though
* the reprogramming is going to be manual to avoid adding
* all the MACs that aren't support.
* We don't have to clear up everything though because the
* reprogramming is manual. When we resume, we'll actually
* go through a proper restart sequence again to switch
* back to the runtime firmware image.
*/
set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
/* We reprogram keys and shouldn't allocate new key indices */
memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
mvm->ptk_ivlen = 0;
mvm->ptk_icvlen = 0;
mvm->ptk_ivlen = 0;
mvm->ptk_icvlen = 0;
/*
* The D3 firmware still hardcodes the AP station ID for the
* BSS we're associated with as 0. As a result, we have to move
* the auxiliary station to ID 1 so the ID 0 remains free for
* the AP station for later.
* We set the sta_id to 1 here, and reset it to its previous
* value (that we stored above) later.
*/
mvm->aux_sta.sta_id = 1;
ret = iwl_mvm_load_d3_fw(mvm);
if (ret)
goto out;
ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
if (ret)
goto out;
if (!iwlwifi_mod_params.sw_crypto) {
/*
* This needs to be unlocked due to lock ordering
* constraints. Since we're in the suspend path
* that isn't really a problem though.
*/
mutex_unlock(&mvm->mutex);
ieee80211_iter_keys(mvm->hw, vif,
iwl_mvm_wowlan_program_keys,
&key_data);
mutex_lock(&mvm->mutex);
if (key_data.error) {
ret = -EIO;
goto out;
}
if (key_data.use_rsc_tsc) {
struct iwl_host_cmd rsc_tsc_cmd = {
.id = WOWLAN_TSC_RSC_PARAM,
.flags = CMD_SYNC,
.data[0] = key_data.rsc_tsc,
.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
.len[0] = sizeof(*key_data.rsc_tsc),
};
ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
if (ret)
goto out;
}
if (key_data.use_tkip) {
ret = iwl_mvm_send_cmd_pdu(mvm,
WOWLAN_TKIP_PARAM,
CMD_SYNC, sizeof(tkip_cmd),
&tkip_cmd);
if (ret)
goto out;
}
if (mvmvif->rekey_data.valid) {
memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
NL80211_KCK_LEN);
kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
NL80211_KEK_LEN);
kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
ret = iwl_mvm_send_cmd_pdu(mvm,
WOWLAN_KEK_KCK_MATERIAL,
CMD_SYNC,
sizeof(kek_kck_cmd),
&kek_kck_cmd);
if (ret)
goto out;
}
}
ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION,
CMD_SYNC, sizeof(wowlan_config_cmd),
&wowlan_config_cmd);
if (ret)
goto out;
ret = iwl_mvm_send_patterns(mvm, wowlan);
if (ret)
goto out;
ret = iwl_mvm_send_proto_offload(mvm, vif);
if (ret)
goto out;
ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
if (ret)
goto out;
/* must be last -- this switches firmware state */
ret = iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD, CMD_SYNC,
sizeof(d3_cfg_cmd), &d3_cfg_cmd);
if (ret)
goto out;
clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
iwl_trans_d3_suspend(mvm->trans);
out:
mvm->aux_sta.sta_id = old_aux_sta_id;
mvm_ap_sta->sta_id = old_ap_sta_id;
mvmvif->ap_sta_id = old_ap_sta_id;
out_noreset:
kfree(key_data.rsc_tsc);
if (ret < 0)
ieee80211_restart_hw(mvm->hw);
mutex_unlock(&mvm->mutex);
return ret;
}
static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
struct ieee80211_vif *vif)
{
u32 base = mvm->error_event_table;
struct error_table_start {
/* cf. struct iwl_error_event_table */
u32 valid;
u32 error_id;
} err_info;
struct cfg80211_wowlan_wakeup wakeup = {
.pattern_idx = -1,
};
struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
struct iwl_host_cmd cmd = {
.id = WOWLAN_GET_STATUSES,
.flags = CMD_SYNC | CMD_WANT_SKB,
};
struct iwl_wowlan_status *status;
u32 reasons;
int ret, len;
struct sk_buff *pkt = NULL;
iwl_trans_read_mem_bytes(mvm->trans, base,
&err_info, sizeof(err_info));
if (err_info.valid) {
IWL_INFO(mvm, "error table is valid (%d)\n",
err_info.valid);
if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
wakeup.rfkill_release = true;
ieee80211_report_wowlan_wakeup(vif, &wakeup,
GFP_KERNEL);
}
return;
}
/* only for tracing for now */
ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL);
if (ret)
IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
ret = iwl_mvm_send_cmd(mvm, &cmd);
if (ret) {
IWL_ERR(mvm, "failed to query status (%d)\n", ret);
return;
}
/* RF-kill already asserted again... */
if (!cmd.resp_pkt)
return;
len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
if (len - sizeof(struct iwl_cmd_header) < sizeof(*status)) {
IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
goto out;
}
status = (void *)cmd.resp_pkt->data;
if (len - sizeof(struct iwl_cmd_header) !=
sizeof(*status) +
ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4)) {
IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
goto out;
}
reasons = le32_to_cpu(status->wakeup_reasons);
if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
wakeup_report = NULL;
goto report;
}
if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
wakeup.magic_pkt = true;
if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
wakeup.pattern_idx =
le16_to_cpu(status->pattern_number);
if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
wakeup.disconnect = true;
if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
wakeup.gtk_rekey_failure = true;
if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
wakeup.rfkill_release = true;
if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
wakeup.eap_identity_req = true;
if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
wakeup.four_way_handshake = true;
if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
wakeup.tcp_connlost = true;
if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
wakeup.tcp_nomoretokens = true;
if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
wakeup.tcp_match = true;
if (status->wake_packet_bufsize) {
int pktsize = le32_to_cpu(status->wake_packet_bufsize);
int pktlen = le32_to_cpu(status->wake_packet_length);
const u8 *pktdata = status->wake_packet;
struct ieee80211_hdr *hdr = (void *)pktdata;
int truncated = pktlen - pktsize;
/* this would be a firmware bug */
if (WARN_ON_ONCE(truncated < 0))
truncated = 0;
if (ieee80211_is_data(hdr->frame_control)) {
int hdrlen = ieee80211_hdrlen(hdr->frame_control);
int ivlen = 0, icvlen = 4; /* also FCS */
pkt = alloc_skb(pktsize, GFP_KERNEL);
if (!pkt)
goto report;
memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
pktdata += hdrlen;
pktsize -= hdrlen;
if (ieee80211_has_protected(hdr->frame_control)) {
if (is_multicast_ether_addr(hdr->addr1)) {
ivlen = mvm->gtk_ivlen;
icvlen += mvm->gtk_icvlen;
} else {
ivlen = mvm->ptk_ivlen;
icvlen += mvm->ptk_icvlen;
}
}
/* if truncated, FCS/ICV is (partially) gone */
if (truncated >= icvlen) {
icvlen = 0;
truncated -= icvlen;
} else {
icvlen -= truncated;
truncated = 0;
}
pktsize -= ivlen + icvlen;
pktdata += ivlen;
memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
goto report;
wakeup.packet = pkt->data;
wakeup.packet_present_len = pkt->len;
wakeup.packet_len = pkt->len - truncated;
wakeup.packet_80211 = false;
} else {
int fcslen = 4;
if (truncated >= 4) {
truncated -= 4;
fcslen = 0;
} else {
fcslen -= truncated;
truncated = 0;
}
pktsize -= fcslen;
wakeup.packet = status->wake_packet;
wakeup.packet_present_len = pktsize;
wakeup.packet_len = pktlen - truncated;
wakeup.packet_80211 = true;
}
}
report:
ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
kfree_skb(pkt);
out:
iwl_free_resp(&cmd);
}
int iwl_mvm_resume(struct ieee80211_hw *hw)
{
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
struct iwl_d3_iter_data resume_iter_data = {
.mvm = mvm,
};
struct ieee80211_vif *vif = NULL;
int ret;
enum iwl_d3_status d3_status;
mutex_lock(&mvm->mutex);
/* get the BSS vif pointer again */
ieee80211_iterate_active_interfaces_atomic(
mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_d3_iface_iterator, &resume_iter_data);
if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
goto out_unlock;
vif = resume_iter_data.vif;
ret = iwl_trans_d3_resume(mvm->trans, &d3_status);
if (ret)
goto out_unlock;
if (d3_status != IWL_D3_STATUS_ALIVE) {
IWL_INFO(mvm, "Device was reset during suspend\n");
goto out_unlock;
}
iwl_mvm_query_wakeup_reasons(mvm, vif);
out_unlock:
mutex_unlock(&mvm->mutex);
if (vif)
ieee80211_resume_disconnect(vif);
/* return 1 to reconfigure the device */
set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
return 1;
}
void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
{
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
device_set_wakeup_enable(mvm->trans->dev, enabled);
}