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Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/d3.c')
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/d3.c371
1 files changed, 341 insertions, 30 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/d3.c b/drivers/net/wireless/iwlwifi/mvm/d3.c
index c64d864799cd..16bbdcc8627a 100644
--- a/drivers/net/wireless/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/iwlwifi/mvm/d3.c
@@ -22,7 +22,7 @@
* USA
*
* The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
+ * in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
@@ -61,8 +61,11 @@
*
*****************************************************************************/
+#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"
@@ -192,6 +195,11 @@ static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
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;
}
@@ -304,9 +312,13 @@ static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
*/
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);
@@ -392,6 +404,233 @@ static int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
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;
@@ -530,7 +769,14 @@ int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
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 = {};
+ 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,
@@ -627,9 +873,21 @@ int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
if (wowlan->rfkill_release)
- d3_cfg_cmd.wakeup_flags |=
+ 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);
@@ -649,6 +907,11 @@ int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
/* 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
@@ -740,6 +1003,10 @@ int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
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);
@@ -783,7 +1050,6 @@ static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
struct iwl_wowlan_status *status;
u32 reasons;
int ret, len;
- bool pkt8023 = false;
struct sk_buff *pkt = NULL;
iwl_trans_read_mem_bytes(mvm->trans, base,
@@ -824,7 +1090,8 @@ static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
status = (void *)cmd.resp_pkt->data;
if (len - sizeof(struct iwl_cmd_header) !=
- sizeof(*status) + le32_to_cpu(status->wake_packet_bufsize)) {
+ sizeof(*status) +
+ ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4)) {
IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
goto out;
}
@@ -836,61 +1103,105 @@ static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
goto report;
}
- if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET) {
+ if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
wakeup.magic_pkt = true;
- pkt8023 = true;
- }
- if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN) {
+ if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
wakeup.pattern_idx =
le16_to_cpu(status->pattern_number);
- pkt8023 = true;
- }
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) {
+ if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
wakeup.gtk_rekey_failure = true;
- pkt8023 = true;
- }
- if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED) {
+ if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
wakeup.rfkill_release = true;
- pkt8023 = true;
- }
- if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST) {
+ if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
wakeup.eap_identity_req = true;
- pkt8023 = true;
- }
- if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE) {
+ if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
wakeup.four_way_handshake = true;
- pkt8023 = 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) {
- u32 pktsize = le32_to_cpu(status->wake_packet_bufsize);
- u32 pktlen = le32_to_cpu(status->wake_packet_length);
+ 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 */
- if (pkt8023) {
pkt = alloc_skb(pktsize, GFP_KERNEL);
if (!pkt)
goto report;
- memcpy(skb_put(pkt, pktsize), status->wake_packet,
- pktsize);
+
+ 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 - (pktlen - pktsize);
+ 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;
+ wakeup.packet_len = pktlen - truncated;
wakeup.packet_80211 = true;
}
}
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