2021-06-01 02:47:59

by Bryan O'Donoghue

[permalink] [raw]
Subject: [PATCH v4 00/12] wcn36xx: Enable downstream consistent Wake on Lan

V4:

A few functions need to be declared static which were only flagged by the
test robot when the V3 patches hit pending

- get_first_vif - Kernel test robot
Patch #2
https://www.mail-archive.com/[email protected]/msg13558.html

- wcn36xx_ipv6_addr_change - Kernel test robot
https://www.mail-archive.com/[email protected]/msg13571.html
Patch #5

- wcn36xx_set_rekey_data - Kernel test robot
Patch #7
https://www.mail-archive.com/[email protected]/msg13559.html

Missed making this IPV6 only in the previous round

- Fixed an IPV6 optional compliation missed in V3 - Kernel test robot
https://www.mail-archive.com/[email protected]/msg13563.html
Patch #6

Feedback from Ben and Loic

- Streamlines the finding of the first associated VIF - Loic Poulain
Patch #2
https://www.spinics.net/lists/linux-wireless/msg209208.html

- Adds Tested-by: Benjamin Li as indicated
Patch *

I've verified this on Debian with 5.13.x and Android with 4.19.x where
4.19.x contains an appropriate out-of-tree LPM patch, to verify
suspend/resume with offloaded ARP in suspend for ipv4 and ipv6 still works.

V3:
- Ifdefs an IPV6 specific function which will not compile unless CONFIG_IPV6
is switched on - Kernel test robot

V2:
- Drops work-around for scan in progress
This is not required on a tip of tree kernel - Kalle
- Churn out "this patch" form commit logs - Kalle
- Adds comment about packing structures to commit log patch #8 - Kalle
- Moves enablement of magic-packet and GTK rekey to last patch
This means that the functionality is only switched on when the full
series has been applied - Kalle

https://www.spinics.net/lists/linux-wireless/msg206927.html

V1:
This series enables Wake on WLAN for the wcn36xx. Downstream implements two
competing methods for WoWLAN, only one of which is used in practice.

1. The downstream prima driver and firmware have a dedicated wowlan SMD
command set, however for whatever reason, the downstream driver doesn't
actually use that code path for suspend/resume.
Similarly the downstream kernel will mask out the SMD interrupt when
entering into suspend, so its clear the firmware assisted wowlan command
is not used at all.
In short, the code is implemented but not used.

2. The alternative version of wake on wlan implemented downstream does
A. An RXP filter
B. Frimware ipv4 ARP offload
C. Frimware ipv6 namesapece offload
D. GTK replay counter save/update on suspend/resume

This patchset replicates method #2 since it is the only method that
actually works. When replicating the functionality from downstream to
upsteam I found the RXP filter step to be redundant, so I skipped that.

Verified on Android/4.19 with qcom out-of-tree low-power patch on wcn3680.
Verified on Debian/kvalo/master on wcn3680 and wcn3620.

The Debian/upstream test doesn't include the low-power patches from qcom so
the time it takes the system to wake up when pinged is longer.

Test method:

1. Enable magic packet wakeup on target
iw phy0 wowlan enable magic-packet
iw phy0 wowlan show

2. Flush arp tables on host
sudo ip -s -s neigh flush all
sudo ip -6 -s -s neigh flush all

3. Suspend device
echo 1 > /sys/kernel/debug/clk/debug_suspend
echo mem > /sys/power/state ; cat /sys/kernel/debug/rpm_stats
echo 0 > /sys/module/wcn36xx/parameters/debug_mask
dmesg

4. Ping either ipv4 or ipv6
ping 192.168.0.85
ping -6 fe80::6455:44ff:fe33:2211%wlo1

In both cases using Wireshark we see the target system receive an ARP or
NS6 lookup and respond, followed by the host sending a ping or ping6 and
the target system coming out of suspend.

Similarly watching GTK keying on the AP when the device is in suspend, we
see the firmware successfully rekey and when we resume, the host picking up
the rekey material with persistence of the WiFi link during suspend/resume.

commit 5336fad96e8f ("wcn36xx: Enable firmware offloaded keepalive")
ensures that the link is kept alive in suspend, this additional set gives
the ability to

- Resolve ARP/NS6 lookups without waking the system
- Rekeying in suspend
- Suspending and resuming based on received datagram

https://git.linaro.org/people/bryan.odonoghue/kernel.git/log/?h=ath.master-wcn36xx-fw-offload-suspend-resume

Bryan O'Donoghue (12):
wcn36xx: Return result of set_power_params in suspend
wcn36xx: Run suspend for the first ieee80211_vif
wcn36xx: Add ipv4 ARP offload support in suspend
wcn36xx: Do not flush indication queue on suspend/resume
wcn36xx: Add ipv6 address tracking
wcn36xx: Add ipv6 namespace offload in suspend
wcn36xx: Add set_rekey_data callback
wcn36xx: Add GTK offload to WoWLAN path
wcn36xx: Add GTK offload info to WoWLAN resume
wcn36xx: Add Host suspend indication support
wcn36xx: Add host resume request support
wcn36xx: Enable WOWLAN flags

drivers/net/wireless/ath/wcn36xx/hal.h | 20 +-
drivers/net/wireless/ath/wcn36xx/main.c | 110 ++++++++-
drivers/net/wireless/ath/wcn36xx/smd.c | 265 +++++++++++++++++++++
drivers/net/wireless/ath/wcn36xx/smd.h | 17 ++
drivers/net/wireless/ath/wcn36xx/wcn36xx.h | 14 ++
5 files changed, 412 insertions(+), 14 deletions(-)

--
2.30.1


2021-06-01 02:48:00

by Bryan O'Donoghue

[permalink] [raw]
Subject: [PATCH v4 03/12] wcn36xx: Add ipv4 ARP offload support in suspend

Add ARP offload support. Firmware is capable of responding to ARP requests
for a single ipv4 address only.

Signed-off-by: Bryan O'Donoghue <[email protected]>
Tested-by: Benjamin Li <[email protected]>
---
drivers/net/wireless/ath/wcn36xx/hal.h | 10 +++----
drivers/net/wireless/ath/wcn36xx/main.c | 14 +++++++--
drivers/net/wireless/ath/wcn36xx/smd.c | 38 +++++++++++++++++++++++++
drivers/net/wireless/ath/wcn36xx/smd.h | 4 +++
4 files changed, 58 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/hal.h b/drivers/net/wireless/ath/wcn36xx/hal.h
index 65ef893f2736..b56c8292fa62 100644
--- a/drivers/net/wireless/ath/wcn36xx/hal.h
+++ b/drivers/net/wireless/ath/wcn36xx/hal.h
@@ -3465,7 +3465,7 @@ struct wcn36xx_hal_rem_bcn_filter_req {
#define WCN36XX_HAL_OFFLOAD_ENABLE 1
#define WCN36XX_HAL_OFFLOAD_BCAST_FILTER_ENABLE 0x2
#define WCN36XX_HAL_OFFLOAD_ARP_AND_BCAST_FILTER_ENABLE \
- (HAL_OFFLOAD_ENABLE|HAL_OFFLOAD_BCAST_FILTER_ENABLE)
+ (WCN36XX_HAL_OFFLOAD_ENABLE | WCN36XX_HAL_OFFLOAD_BCAST_FILTER_ENABLE)

struct wcn36xx_hal_ns_offload_params {
u8 src_ipv6_addr[WCN36XX_HAL_IPV6_ADDR_LEN];
@@ -3487,10 +3487,10 @@ struct wcn36xx_hal_ns_offload_params {
/* slot index for this offload */
u32 slot_index;
u8 bss_index;
-};
+} __packed;

struct wcn36xx_hal_host_offload_req {
- u8 offload_Type;
+ u8 offload_type;

/* enable or disable */
u8 enable;
@@ -3499,13 +3499,13 @@ struct wcn36xx_hal_host_offload_req {
u8 host_ipv4_addr[4];
u8 host_ipv6_addr[WCN36XX_HAL_IPV6_ADDR_LEN];
} u;
-};
+} __packed;

struct wcn36xx_hal_host_offload_req_msg {
struct wcn36xx_hal_msg_header header;
struct wcn36xx_hal_host_offload_req host_offload_params;
struct wcn36xx_hal_ns_offload_params ns_offload_params;
-};
+} __packed;

/* Packet Types. */
#define WCN36XX_HAL_KEEP_ALIVE_NULL_PKT 1
diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index 6802dce2a02b..0da123660fa1 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -1112,11 +1112,16 @@ static int wcn36xx_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wow)

flush_workqueue(wcn->hal_ind_wq);
mutex_lock(&wcn->conf_mutex);
+
vif = wcn36xx_get_first_assoc_vif(wcn);
- if (vif)
+ if (vif) {
+ ret = wcn36xx_smd_arp_offload(wcn, vif, true);
+ if (ret)
+ goto out;
ret = wcn36xx_smd_set_power_params(wcn, true);
+ }
+out:
mutex_unlock(&wcn->conf_mutex);
-
return ret;
}

@@ -1130,8 +1135,11 @@ static int wcn36xx_resume(struct ieee80211_hw *hw)
flush_workqueue(wcn->hal_ind_wq);
mutex_lock(&wcn->conf_mutex);
vif = wcn36xx_get_first_assoc_vif(wcn);
- if (vif)
+ if (vif) {
wcn36xx_smd_set_power_params(wcn, false);
+ wcn36xx_smd_arp_offload(wcn, vif, false);
+ }
+ mutex_unlock(&wcn->conf_mutex);

return 0;
}
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index d0c3a1557e8d..478e363610e1 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -2756,6 +2756,43 @@ int wcn36xx_smd_set_mc_list(struct wcn36xx *wcn,
return ret;
}

+int wcn36xx_smd_arp_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
+ bool enable)
+{
+ struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
+ struct wcn36xx_hal_host_offload_req_msg msg_body;
+ int ret;
+
+ mutex_lock(&wcn->hal_mutex);
+
+ INIT_HAL_MSG(msg_body, WCN36XX_HAL_HOST_OFFLOAD_REQ);
+ msg_body.host_offload_params.offload_type =
+ WCN36XX_HAL_IPV4_ARP_REPLY_OFFLOAD;
+ if (enable) {
+ msg_body.host_offload_params.enable =
+ WCN36XX_HAL_OFFLOAD_ARP_AND_BCAST_FILTER_ENABLE;
+ memcpy(&msg_body.host_offload_params.u,
+ &vif->bss_conf.arp_addr_list[0], sizeof(__be32));
+ }
+ msg_body.ns_offload_params.bss_index = vif_priv->bss_index;
+
+ PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
+
+ ret = wcn36xx_smd_send_and_wait(wcn, msg_body.header.len);
+ if (ret) {
+ wcn36xx_err("Sending host_offload_arp failed\n");
+ goto out;
+ }
+ ret = wcn36xx_smd_rsp_status_check(wcn->hal_buf, wcn->hal_rsp_len);
+ if (ret) {
+ wcn36xx_err("host_offload_arp failed err=%d\n", ret);
+ goto out;
+ }
+out:
+ mutex_unlock(&wcn->hal_mutex);
+ return ret;
+}
+
int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
void *buf, int len, void *priv, u32 addr)
{
@@ -2804,6 +2841,7 @@ int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
case WCN36XX_HAL_8023_MULTICAST_LIST_RSP:
case WCN36XX_HAL_START_SCAN_OFFLOAD_RSP:
case WCN36XX_HAL_STOP_SCAN_OFFLOAD_RSP:
+ case WCN36XX_HAL_HOST_OFFLOAD_RSP:
memcpy(wcn->hal_buf, buf, len);
wcn->hal_rsp_len = len;
complete(&wcn->hal_rsp_compl);
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.h b/drivers/net/wireless/ath/wcn36xx/smd.h
index 462860572e1f..6492a628ea6a 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.h
+++ b/drivers/net/wireless/ath/wcn36xx/smd.h
@@ -146,4 +146,8 @@ int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
int wcn36xx_smd_set_mc_list(struct wcn36xx *wcn,
struct ieee80211_vif *vif,
struct wcn36xx_hal_rcv_flt_mc_addr_list_type *fp);
+
+int wcn36xx_smd_arp_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
+ bool enable);
+
#endif /* _SMD_H_ */
--
2.30.1

2021-06-01 02:48:05

by Bryan O'Donoghue

[permalink] [raw]
Subject: [PATCH v4 04/12] wcn36xx: Do not flush indication queue on suspend/resume

Testing on Android reveals that the flush on both suspend and resume of the
firmware indication work-queue can stall indefinitely.

Given this code path doesn't appear to have been exercised up until now,
removing this flush to unblock this situation.

Signed-off-by: Bryan O'Donoghue <[email protected]>
Tested-by: Benjamin Li <[email protected]>
---
drivers/net/wireless/ath/wcn36xx/main.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index 0da123660fa1..9731fcbe2e7f 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -1110,7 +1110,6 @@ static int wcn36xx_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wow)

wcn36xx_dbg(WCN36XX_DBG_MAC, "mac suspend\n");

- flush_workqueue(wcn->hal_ind_wq);
mutex_lock(&wcn->conf_mutex);

vif = wcn36xx_get_first_assoc_vif(wcn);
@@ -1132,7 +1131,6 @@ static int wcn36xx_resume(struct ieee80211_hw *hw)

wcn36xx_dbg(WCN36XX_DBG_MAC, "mac resume\n");

- flush_workqueue(wcn->hal_ind_wq);
mutex_lock(&wcn->conf_mutex);
vif = wcn36xx_get_first_assoc_vif(wcn);
if (vif) {
--
2.30.1

2021-06-01 02:48:07

by Bryan O'Donoghue

[permalink] [raw]
Subject: [PATCH v4 05/12] wcn36xx: Add ipv6 address tracking

Taking code from iwlwifi this commit adds a standard callback for
ipv6_addr_change().

This callback allows wcn36xx to know the set of ipv6 addresses. Something
we need to know in order to get wowlan working with ipv6.

Signed-off-by: Bryan O'Donoghue <[email protected]>
Tested-by: Benjamin Li <[email protected]>
---
drivers/net/wireless/ath/wcn36xx/hal.h | 1 +
drivers/net/wireless/ath/wcn36xx/main.c | 32 ++++++++++++++++++++++
drivers/net/wireless/ath/wcn36xx/wcn36xx.h | 8 ++++++
3 files changed, 41 insertions(+)

diff --git a/drivers/net/wireless/ath/wcn36xx/hal.h b/drivers/net/wireless/ath/wcn36xx/hal.h
index b56c8292fa62..90333daed845 100644
--- a/drivers/net/wireless/ath/wcn36xx/hal.h
+++ b/drivers/net/wireless/ath/wcn36xx/hal.h
@@ -3466,6 +3466,7 @@ struct wcn36xx_hal_rem_bcn_filter_req {
#define WCN36XX_HAL_OFFLOAD_BCAST_FILTER_ENABLE 0x2
#define WCN36XX_HAL_OFFLOAD_ARP_AND_BCAST_FILTER_ENABLE \
(WCN36XX_HAL_OFFLOAD_ENABLE | WCN36XX_HAL_OFFLOAD_BCAST_FILTER_ENABLE)
+#define WCN36XX_HAL_IPV6_OFFLOAD_ADDR_MAX 0x02

struct wcn36xx_hal_ns_offload_params {
u8 src_ipv6_addr[WCN36XX_HAL_IPV6_ADDR_LEN];
diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index 9731fcbe2e7f..240ecdd52f81 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -25,6 +25,7 @@
#include <linux/rpmsg.h>
#include <linux/soc/qcom/smem_state.h>
#include <linux/soc/qcom/wcnss_ctrl.h>
+#include <net/ipv6.h>
#include "wcn36xx.h"
#include "testmode.h"

@@ -1208,6 +1209,34 @@ static int wcn36xx_ampdu_action(struct ieee80211_hw *hw,
return ret;
}

+#if IS_ENABLED(CONFIG_IPV6)
+static void wcn36xx_ipv6_addr_change(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct inet6_dev *idev)
+{
+ struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
+ struct inet6_ifaddr *ifa;
+ int idx = 0;
+
+ memset(vif_priv->tentative_addrs, 0, sizeof(vif_priv->tentative_addrs));
+
+ read_lock_bh(&idev->lock);
+ list_for_each_entry(ifa, &idev->addr_list, if_list) {
+ vif_priv->target_ipv6_addrs[idx] = ifa->addr;
+ if (ifa->flags & IFA_F_TENTATIVE)
+ __set_bit(idx, vif_priv->tentative_addrs);
+ idx++;
+ if (idx >= WCN36XX_HAL_IPV6_OFFLOAD_ADDR_MAX)
+ break;
+ wcn36xx_dbg(WCN36XX_DBG_MAC, "%pI6 %s\n", &ifa->addr,
+ (ifa->flags & IFA_F_TENTATIVE) ? "tentative" : NULL);
+ }
+ read_unlock_bh(&idev->lock);
+
+ vif_priv->num_target_ipv6_addrs = idx;
+}
+#endif
+
static const struct ieee80211_ops wcn36xx_ops = {
.start = wcn36xx_start,
.stop = wcn36xx_stop,
@@ -1231,6 +1260,9 @@ static const struct ieee80211_ops wcn36xx_ops = {
.sta_add = wcn36xx_sta_add,
.sta_remove = wcn36xx_sta_remove,
.ampdu_action = wcn36xx_ampdu_action,
+#if IS_ENABLED(CONFIG_IPV6)
+ .ipv6_addr_change = wcn36xx_ipv6_addr_change,
+#endif

CFG80211_TESTMODE_CMD(wcn36xx_tm_cmd)
};
diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
index 71fa9992b118..5a5114660b18 100644
--- a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
+++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
@@ -18,6 +18,7 @@
#define _WCN36XX_H_

#include <linux/completion.h>
+#include <linux/in6.h>
#include <linux/printk.h>
#include <linux/spinlock.h>
#include <net/mac80211.h>
@@ -136,6 +137,13 @@ struct wcn36xx_vif {
u8 self_dpu_desc_index;
u8 self_ucast_dpu_sign;

+#if IS_ENABLED(CONFIG_IPV6)
+ /* IPv6 addresses for WoWLAN */
+ struct in6_addr target_ipv6_addrs[WCN36XX_HAL_IPV6_OFFLOAD_ADDR_MAX];
+ unsigned long tentative_addrs[BITS_TO_LONGS(WCN36XX_HAL_IPV6_OFFLOAD_ADDR_MAX)];
+ int num_target_ipv6_addrs;
+#endif
+
struct list_head sta_list;
};

--
2.30.1

2021-06-01 02:48:09

by Bryan O'Donoghue

[permalink] [raw]
Subject: [PATCH v4 06/12] wcn36xx: Add ipv6 namespace offload in suspend

We need to respond to ipv6 namespace lookups when in suspend. This patch
adds the necessary changes to issue the appropriate firmware command on
suspend and resume to enter/exit firmware offloaded ns lookup.

Signed-off-by: Bryan O'Donoghue <[email protected]>
Reported-by: kernel test robot <[email protected]>
Tested-by: Benjamin Li <[email protected]>
---
drivers/net/wireless/ath/wcn36xx/hal.h | 3 ++
drivers/net/wireless/ath/wcn36xx/main.c | 4 ++
drivers/net/wireless/ath/wcn36xx/smd.c | 63 +++++++++++++++++++++++++
drivers/net/wireless/ath/wcn36xx/smd.h | 3 ++
4 files changed, 73 insertions(+)

diff --git a/drivers/net/wireless/ath/wcn36xx/hal.h b/drivers/net/wireless/ath/wcn36xx/hal.h
index 90333daed845..3b949b0b3792 100644
--- a/drivers/net/wireless/ath/wcn36xx/hal.h
+++ b/drivers/net/wireless/ath/wcn36xx/hal.h
@@ -3464,6 +3464,9 @@ struct wcn36xx_hal_rem_bcn_filter_req {
#define WCN36XX_HAL_OFFLOAD_DISABLE 0
#define WCN36XX_HAL_OFFLOAD_ENABLE 1
#define WCN36XX_HAL_OFFLOAD_BCAST_FILTER_ENABLE 0x2
+#define WCN36XX_HAL_OFFLOAD_MCAST_FILTER_ENABLE 0x4
+#define WCN36XX_HAL_OFFLOAD_NS_AND_MCAST_FILTER_ENABLE \
+ (WCN36XX_HAL_OFFLOAD_ENABLE | WCN36XX_HAL_OFFLOAD_MCAST_FILTER_ENABLE)
#define WCN36XX_HAL_OFFLOAD_ARP_AND_BCAST_FILTER_ENABLE \
(WCN36XX_HAL_OFFLOAD_ENABLE | WCN36XX_HAL_OFFLOAD_BCAST_FILTER_ENABLE)
#define WCN36XX_HAL_IPV6_OFFLOAD_ADDR_MAX 0x02
diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index 240ecdd52f81..09e22f829682 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -1116,6 +1116,9 @@ static int wcn36xx_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wow)
vif = wcn36xx_get_first_assoc_vif(wcn);
if (vif) {
ret = wcn36xx_smd_arp_offload(wcn, vif, true);
+ if (ret)
+ goto out;
+ ret = wcn36xx_smd_ipv6_ns_offload(wcn, vif, true);
if (ret)
goto out;
ret = wcn36xx_smd_set_power_params(wcn, true);
@@ -1136,6 +1139,7 @@ static int wcn36xx_resume(struct ieee80211_hw *hw)
vif = wcn36xx_get_first_assoc_vif(wcn);
if (vif) {
wcn36xx_smd_set_power_params(wcn, false);
+ wcn36xx_smd_ipv6_ns_offload(wcn, vif, false);
wcn36xx_smd_arp_offload(wcn, vif, false);
}
mutex_unlock(&wcn->conf_mutex);
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index 478e363610e1..4a50e5f8456a 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -2793,6 +2793,69 @@ int wcn36xx_smd_arp_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
return ret;
}

+#if IS_ENABLED(CONFIG_IPV6)
+int wcn36xx_smd_ipv6_ns_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
+ bool enable)
+{
+ struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
+ struct wcn36xx_hal_host_offload_req_msg msg_body;
+ struct wcn36xx_hal_ns_offload_params *ns_params;
+ struct wcn36xx_hal_host_offload_req *ho_params;
+ int ret;
+
+ mutex_lock(&wcn->hal_mutex);
+
+ INIT_HAL_MSG(msg_body, WCN36XX_HAL_HOST_OFFLOAD_REQ);
+ ho_params = &msg_body.host_offload_params;
+ ns_params = &msg_body.ns_offload_params;
+
+ ho_params->offload_type = WCN36XX_HAL_IPV6_NS_OFFLOAD;
+ if (enable) {
+ ho_params->enable =
+ WCN36XX_HAL_OFFLOAD_NS_AND_MCAST_FILTER_ENABLE;
+ if (vif_priv->num_target_ipv6_addrs) {
+ memcpy(&ho_params->u,
+ &vif_priv->target_ipv6_addrs[0].in6_u,
+ sizeof(struct in6_addr));
+ memcpy(&ns_params->target_ipv6_addr1,
+ &vif_priv->target_ipv6_addrs[0].in6_u,
+ sizeof(struct in6_addr));
+ ns_params->target_ipv6_addr1_valid = 1;
+ }
+ if (vif_priv->num_target_ipv6_addrs > 1) {
+ memcpy(&ns_params->target_ipv6_addr2,
+ &vif_priv->target_ipv6_addrs[1].in6_u,
+ sizeof(struct in6_addr));
+ ns_params->target_ipv6_addr2_valid = 1;
+ }
+ }
+ memcpy(&ns_params->self_addr, vif->addr, ETH_ALEN);
+ ns_params->bss_index = vif_priv->bss_index;
+
+ PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
+
+ ret = wcn36xx_smd_send_and_wait(wcn, msg_body.header.len);
+ if (ret) {
+ wcn36xx_err("Sending host_offload_arp failed\n");
+ goto out;
+ }
+ ret = wcn36xx_smd_rsp_status_check(wcn->hal_buf, wcn->hal_rsp_len);
+ if (ret) {
+ wcn36xx_err("host_offload_arp failed err=%d\n", ret);
+ goto out;
+ }
+out:
+ mutex_unlock(&wcn->hal_mutex);
+ return ret;
+}
+#else
+int wcn36xx_smd_ipv6_ns_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
+ bool enable)
+{
+ return 0;
+}
+#endif
+
int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
void *buf, int len, void *priv, u32 addr)
{
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.h b/drivers/net/wireless/ath/wcn36xx/smd.h
index 6492a628ea6a..e03ab7878432 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.h
+++ b/drivers/net/wireless/ath/wcn36xx/smd.h
@@ -150,4 +150,7 @@ int wcn36xx_smd_set_mc_list(struct wcn36xx *wcn,
int wcn36xx_smd_arp_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
bool enable);

+int wcn36xx_smd_ipv6_ns_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
+ bool enable);
+
#endif /* _SMD_H_ */
--
2.30.1

2021-06-01 02:48:12

by Bryan O'Donoghue

[permalink] [raw]
Subject: [PATCH v4 07/12] wcn36xx: Add set_rekey_data callback

Add a callback for Group Temporal Key tracking as provided by the standard
WiFi ops structure.

We track the key to integrate GTK offloading into the WoWLAN suspend path
later on. Code comes from the Intel iwlwifi driver with minimal name
changes.

Signed-off-by: Bryan O'Donoghue <[email protected]>
Tested-by: Benjamin Li <[email protected]>
---
drivers/net/wireless/ath/wcn36xx/main.c | 19 +++++++++++++++++++
drivers/net/wireless/ath/wcn36xx/wcn36xx.h | 6 ++++++
2 files changed, 25 insertions(+)

diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index 09e22f829682..ec32b8b0067d 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -1147,6 +1147,24 @@ static int wcn36xx_resume(struct ieee80211_hw *hw)
return 0;
}

+static void wcn36xx_set_rekey_data(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct cfg80211_gtk_rekey_data *data)
+{
+ struct wcn36xx *wcn = hw->priv;
+ struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
+
+ mutex_lock(&wcn->conf_mutex);
+
+ memcpy(vif_priv->rekey_data.kek, data->kek, NL80211_KEK_LEN);
+ memcpy(vif_priv->rekey_data.kck, data->kck, NL80211_KCK_LEN);
+ vif_priv->rekey_data.replay_ctr =
+ cpu_to_le64(be64_to_cpup((__be64 *)data->replay_ctr));
+ vif_priv->rekey_data.valid = true;
+
+ mutex_unlock(&wcn->conf_mutex);
+}
+
#endif

static int wcn36xx_ampdu_action(struct ieee80211_hw *hw,
@@ -1249,6 +1267,7 @@ static const struct ieee80211_ops wcn36xx_ops = {
#ifdef CONFIG_PM
.suspend = wcn36xx_suspend,
.resume = wcn36xx_resume,
+ .set_rekey_data = wcn36xx_set_rekey_data,
#endif
.config = wcn36xx_config,
.prepare_multicast = wcn36xx_prepare_multicast,
diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
index 5a5114660b18..6121d8a5641a 100644
--- a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
+++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
@@ -143,6 +143,12 @@ struct wcn36xx_vif {
unsigned long tentative_addrs[BITS_TO_LONGS(WCN36XX_HAL_IPV6_OFFLOAD_ADDR_MAX)];
int num_target_ipv6_addrs;
#endif
+ /* WoWLAN GTK rekey data */
+ struct {
+ u8 kck[NL80211_KCK_LEN], kek[NL80211_KEK_LEN];
+ __le64 replay_ctr;
+ bool valid;
+ } rekey_data;

struct list_head sta_list;
};
--
2.30.1

2021-06-01 02:48:12

by Bryan O'Donoghue

[permalink] [raw]
Subject: [PATCH v4 08/12] wcn36xx: Add GTK offload to WoWLAN path

Using previously set GTK KCK and KEK material this commit adds GTK rekeying
to the WoWLAN suspend/resume path. A small error in the packing of the
up to now unused command structure is fixed as we go.

Signed-off-by: Bryan O'Donoghue <[email protected]>
Tested-by: Benjamin Li <[email protected]up.com>
---
drivers/net/wireless/ath/wcn36xx/hal.h | 2 +-
drivers/net/wireless/ath/wcn36xx/main.c | 4 +++
drivers/net/wireless/ath/wcn36xx/smd.c | 38 +++++++++++++++++++++++++
drivers/net/wireless/ath/wcn36xx/smd.h | 3 ++
4 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/hal.h b/drivers/net/wireless/ath/wcn36xx/hal.h
index 3b949b0b3792..1f3c2e840232 100644
--- a/drivers/net/wireless/ath/wcn36xx/hal.h
+++ b/drivers/net/wireless/ath/wcn36xx/hal.h
@@ -4905,7 +4905,7 @@ struct wcn36xx_hal_gtk_offload_req_msg {
u64 key_replay_counter;

u8 bss_index;
-};
+} __packed;

struct wcn36xx_hal_gtk_offload_rsp_msg {
struct wcn36xx_hal_msg_header header;
diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index ec32b8b0067d..db1528a14757 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -1119,6 +1119,9 @@ static int wcn36xx_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wow)
if (ret)
goto out;
ret = wcn36xx_smd_ipv6_ns_offload(wcn, vif, true);
+ if (ret)
+ goto out;
+ ret = wcn36xx_smd_gtk_offload(wcn, vif, true);
if (ret)
goto out;
ret = wcn36xx_smd_set_power_params(wcn, true);
@@ -1139,6 +1142,7 @@ static int wcn36xx_resume(struct ieee80211_hw *hw)
vif = wcn36xx_get_first_assoc_vif(wcn);
if (vif) {
wcn36xx_smd_set_power_params(wcn, false);
+ wcn36xx_smd_gtk_offload(wcn, vif, false);
wcn36xx_smd_ipv6_ns_offload(wcn, vif, false);
wcn36xx_smd_arp_offload(wcn, vif, false);
}
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index 4a50e5f8456a..f74cb16327d0 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -2856,6 +2856,43 @@ int wcn36xx_smd_ipv6_ns_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
}
#endif

+int wcn36xx_smd_gtk_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
+ bool enable)
+{
+ struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
+ struct wcn36xx_hal_gtk_offload_req_msg msg_body;
+ int ret;
+
+ mutex_lock(&wcn->hal_mutex);
+
+ INIT_HAL_MSG(msg_body, WCN36XX_HAL_GTK_OFFLOAD_REQ);
+
+ if (enable) {
+ memcpy(&msg_body.kek, vif_priv->rekey_data.kek, NL80211_KEK_LEN);
+ memcpy(&msg_body.kck, vif_priv->rekey_data.kck, NL80211_KCK_LEN);
+ msg_body.key_replay_counter = vif_priv->rekey_data.replay_ctr;
+ msg_body.bss_index = vif_priv->bss_index;
+ } else {
+ msg_body.flags = WCN36XX_HAL_GTK_OFFLOAD_FLAGS_DISABLE;
+ }
+
+ PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
+
+ ret = wcn36xx_smd_send_and_wait(wcn, msg_body.header.len);
+ if (ret) {
+ wcn36xx_err("Sending host_offload_arp failed\n");
+ goto out;
+ }
+ ret = wcn36xx_smd_rsp_status_check(wcn->hal_buf, wcn->hal_rsp_len);
+ if (ret) {
+ wcn36xx_err("host_offload_arp failed err=%d\n", ret);
+ goto out;
+ }
+out:
+ mutex_unlock(&wcn->hal_mutex);
+ return ret;
+}
+
int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
void *buf, int len, void *priv, u32 addr)
{
@@ -2905,6 +2942,7 @@ int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
case WCN36XX_HAL_START_SCAN_OFFLOAD_RSP:
case WCN36XX_HAL_STOP_SCAN_OFFLOAD_RSP:
case WCN36XX_HAL_HOST_OFFLOAD_RSP:
+ case WCN36XX_HAL_GTK_OFFLOAD_RSP:
memcpy(wcn->hal_buf, buf, len);
wcn->hal_rsp_len = len;
complete(&wcn->hal_rsp_compl);
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.h b/drivers/net/wireless/ath/wcn36xx/smd.h
index e03ab7878432..cdf4231efe26 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.h
+++ b/drivers/net/wireless/ath/wcn36xx/smd.h
@@ -153,4 +153,7 @@ int wcn36xx_smd_arp_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
int wcn36xx_smd_ipv6_ns_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
bool enable);

+int wcn36xx_smd_gtk_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
+ bool enable);
+
#endif /* _SMD_H_ */
--
2.30.1

2021-06-01 02:50:23

by Bryan O'Donoghue

[permalink] [raw]
Subject: [PATCH v4 12/12] wcn36xx: Enable WOWLAN flags

Enable flags for

- Magic packet
- GTK rekey

Previous patches implemented the necessary code to switch these two on.
Standalone magic packet absent GTK rekey is pretty useless, so it makes
sense to flag both at once.

Once done it is possible for wcn36xx firmware to

1. Respond to ipv4 and ipv6 ARP/NS lookup requests
2. Bring the system out of suspend when a magic packet is received.
Magic in our case is a simple ipv4 or ipv6 unicast.
3. GTK rekey whilst in suspend
Once we wake from suspend the GTK will be updated as necessary

Signed-off-by: Bryan O'Donoghue <[email protected]>
Tested-by: Benjamin Li <[email protected]>
---
drivers/net/wireless/ath/wcn36xx/main.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index c697b9f3633a..3a4e383b3a6c 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -173,7 +173,9 @@ static struct ieee80211_supported_band wcn_band_5ghz = {
#ifdef CONFIG_PM

static const struct wiphy_wowlan_support wowlan_support = {
- .flags = WIPHY_WOWLAN_ANY
+ .flags = WIPHY_WOWLAN_ANY |
+ WIPHY_WOWLAN_MAGIC_PKT |
+ WIPHY_WOWLAN_SUPPORTS_GTK_REKEY
};

#endif
--
2.30.1

2021-06-01 02:50:23

by Bryan O'Donoghue

[permalink] [raw]
Subject: [PATCH v4 11/12] wcn36xx: Add host resume request support

This commit is the corresponding resume() path request to the firmware when
resuming. Unlike the suspend() version which is a unidirectional
indication, the resume version is a standard request/response.

Once the resume() request completes ipv4 ARP, ipv6 NS and GTK rekey offload
stop working and can subsequently be rolled back.

Signed-off-by: Bryan O'Donoghue <[email protected]>
Tested-by: Benjamin Li <[email protected]>
---
drivers/net/wireless/ath/wcn36xx/main.c | 1 +
drivers/net/wireless/ath/wcn36xx/smd.c | 35 +++++++++++++++++++++++++
drivers/net/wireless/ath/wcn36xx/smd.h | 2 ++
3 files changed, 38 insertions(+)

diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index e4d5e4d597f9..c697b9f3633a 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -1144,6 +1144,7 @@ static int wcn36xx_resume(struct ieee80211_hw *hw)
mutex_lock(&wcn->conf_mutex);
vif = wcn36xx_get_first_assoc_vif(wcn);
if (vif) {
+ wcn36xx_smd_host_resume(wcn);
wcn36xx_smd_set_power_params(wcn, false);
wcn36xx_smd_gtk_offload_get_info(wcn, vif);
wcn36xx_smd_gtk_offload(wcn, vif, false);
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index 302877d23ecf..de0f630a82be 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -2983,6 +2983,40 @@ int wcn36xx_smd_wlan_host_suspend_ind(struct wcn36xx *wcn)
return ret;
}

+int wcn36xx_smd_host_resume(struct wcn36xx *wcn)
+{
+ struct wcn36xx_hal_wlan_host_resume_req_msg msg_body;
+ struct wcn36xx_hal_host_resume_rsp_msg *rsp;
+ int ret;
+
+ mutex_lock(&wcn->hal_mutex);
+
+ INIT_HAL_MSG(msg_body, WCN36XX_HAL_HOST_RESUME_REQ);
+ msg_body.configured_mcst_bcst_filter_setting = 0;
+
+ PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
+
+ ret = wcn36xx_smd_send_and_wait(wcn, msg_body.header.len);
+ if (ret) {
+ wcn36xx_err("Sending wlan_host_resume failed\n");
+ goto out;
+ }
+ ret = wcn36xx_smd_rsp_status_check(wcn->hal_buf, wcn->hal_rsp_len);
+ if (ret) {
+ wcn36xx_err("wlan_host_resume err=%d\n", ret);
+ goto out;
+ }
+
+ rsp = (struct wcn36xx_hal_host_resume_rsp_msg *)wcn->hal_buf;
+ if (rsp->status)
+ wcn36xx_warn("wlan_host_resume status=%d\n", rsp->status);
+
+out:
+ mutex_unlock(&wcn->hal_mutex);
+
+ return ret;
+}
+
int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
void *buf, int len, void *priv, u32 addr)
{
@@ -3034,6 +3068,7 @@ int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
case WCN36XX_HAL_HOST_OFFLOAD_RSP:
case WCN36XX_HAL_GTK_OFFLOAD_RSP:
case WCN36XX_HAL_GTK_OFFLOAD_GETINFO_RSP:
+ case WCN36XX_HAL_HOST_RESUME_RSP:
memcpy(wcn->hal_buf, buf, len);
wcn->hal_rsp_len = len;
complete(&wcn->hal_rsp_compl);
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.h b/drivers/net/wireless/ath/wcn36xx/smd.h
index 2909facdb100..d8bded03945d 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.h
+++ b/drivers/net/wireless/ath/wcn36xx/smd.h
@@ -161,4 +161,6 @@ int wcn36xx_smd_gtk_offload_get_info(struct wcn36xx *wcn,

int wcn36xx_smd_wlan_host_suspend_ind(struct wcn36xx *wcn);

+int wcn36xx_smd_host_resume(struct wcn36xx *wcn);
+
#endif /* _SMD_H_ */
--
2.30.1

2021-06-01 02:50:23

by Bryan O'Donoghue

[permalink] [raw]
Subject: [PATCH v4 09/12] wcn36xx: Add GTK offload info to WoWLAN resume

Having enabled GTK rekey in suspend, we need to extract the replay counter
from the firmware on resume and perform a ieee80211_gtk_rekey_notify() so
that the STA remains verified from the perspective of the AP.

In order to enable the SMD command and response we need to pack the
existing command/response structures. Given these structures are currently
unused, there's no need to backport this as a fix.

Signed-off-by: Bryan O'Donoghue <[email protected]>
Tested-by: Benjamin Li <[email protected]>
---
drivers/net/wireless/ath/wcn36xx/hal.h | 4 +-
drivers/net/wireless/ath/wcn36xx/main.c | 1 +
drivers/net/wireless/ath/wcn36xx/smd.c | 72 +++++++++++++++++++++++++
drivers/net/wireless/ath/wcn36xx/smd.h | 3 ++
4 files changed, 78 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/hal.h b/drivers/net/wireless/ath/wcn36xx/hal.h
index 1f3c2e840232..455143c4164e 100644
--- a/drivers/net/wireless/ath/wcn36xx/hal.h
+++ b/drivers/net/wireless/ath/wcn36xx/hal.h
@@ -4919,7 +4919,7 @@ struct wcn36xx_hal_gtk_offload_rsp_msg {
struct wcn36xx_hal_gtk_offload_get_info_req_msg {
struct wcn36xx_hal_msg_header header;
u8 bss_index;
-};
+} __packed;

struct wcn36xx_hal_gtk_offload_get_info_rsp_msg {
struct wcn36xx_hal_msg_header header;
@@ -4943,7 +4943,7 @@ struct wcn36xx_hal_gtk_offload_get_info_rsp_msg {
u32 igtk_rekey_count;

u8 bss_index;
-};
+} __packed;

struct dhcp_info {
/* Indicates the device mode which indicates about the DHCP activity */
diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index db1528a14757..8e5d8326d551 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -1142,6 +1142,7 @@ static int wcn36xx_resume(struct ieee80211_hw *hw)
vif = wcn36xx_get_first_assoc_vif(wcn);
if (vif) {
wcn36xx_smd_set_power_params(wcn, false);
+ wcn36xx_smd_gtk_offload_get_info(wcn, vif);
wcn36xx_smd_gtk_offload(wcn, vif, false);
wcn36xx_smd_ipv6_ns_offload(wcn, vif, false);
wcn36xx_smd_arp_offload(wcn, vif, false);
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index f74cb16327d0..e249971c4ef7 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -2893,6 +2893,77 @@ int wcn36xx_smd_gtk_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
return ret;
}

+static int wcn36xx_smd_gtk_offload_get_info_rsp(struct wcn36xx *wcn,
+ struct ieee80211_vif *vif)
+{
+ struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
+ struct wcn36xx_hal_gtk_offload_get_info_rsp_msg *rsp;
+ __be64 replay_ctr;
+
+ if (wcn36xx_smd_rsp_status_check(wcn->hal_buf, wcn->hal_rsp_len))
+ return -EIO;
+
+ rsp = (struct wcn36xx_hal_gtk_offload_get_info_rsp_msg *)wcn->hal_buf;
+
+ if (rsp->bss_index != vif_priv->bss_index) {
+ wcn36xx_err("gtk_offload_info invalid response bss index %d\n",
+ rsp->bss_index);
+ return -ENOENT;
+ }
+
+ replay_ctr = cpu_to_be64(le64_to_cpu(rsp->key_replay_counter));
+ if (vif_priv->rekey_data.replay_ctr != rsp->key_replay_counter) {
+ vif_priv->rekey_data.replay_ctr = rsp->key_replay_counter;
+ ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
+ (void *)&replay_ctr, GFP_KERNEL);
+ wcn36xx_dbg(WCN36XX_DBG_HAL,
+ "GTK replay counter increment %llu\n",
+ rsp->key_replay_counter);
+ }
+
+ wcn36xx_dbg(WCN36XX_DBG_HAL,
+ "gtk offload info status %d last_rekey_status %d "
+ "replay_counter %llu total_rekey_count %d gtk_rekey_count %d "
+ "igtk_rekey_count %d bss_index %d\n",
+ rsp->status, rsp->last_rekey_status,
+ rsp->key_replay_counter, rsp->total_rekey_count,
+ rsp->gtk_rekey_count, rsp->igtk_rekey_count,
+ rsp->bss_index);
+
+ return 0;
+}
+
+int wcn36xx_smd_gtk_offload_get_info(struct wcn36xx *wcn,
+ struct ieee80211_vif *vif)
+{
+ struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
+ struct wcn36xx_hal_gtk_offload_get_info_req_msg msg_body;
+ int ret;
+
+ mutex_lock(&wcn->hal_mutex);
+
+ INIT_HAL_MSG(msg_body, WCN36XX_HAL_GTK_OFFLOAD_GETINFO_REQ);
+
+ msg_body.bss_index = vif_priv->bss_index;
+
+ PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
+
+ ret = wcn36xx_smd_send_and_wait(wcn, msg_body.header.len);
+ if (ret) {
+ wcn36xx_err("Sending gtk_offload_get_info failed\n");
+ goto out;
+ }
+ ret = wcn36xx_smd_rsp_status_check(wcn->hal_buf, wcn->hal_rsp_len);
+ if (ret) {
+ wcn36xx_err("gtk_offload_get_info failed err=%d\n", ret);
+ goto out;
+ }
+ ret = wcn36xx_smd_gtk_offload_get_info_rsp(wcn, vif);
+out:
+ mutex_unlock(&wcn->hal_mutex);
+ return ret;
+}
+
int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
void *buf, int len, void *priv, u32 addr)
{
@@ -2943,6 +3014,7 @@ int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
case WCN36XX_HAL_STOP_SCAN_OFFLOAD_RSP:
case WCN36XX_HAL_HOST_OFFLOAD_RSP:
case WCN36XX_HAL_GTK_OFFLOAD_RSP:
+ case WCN36XX_HAL_GTK_OFFLOAD_GETINFO_RSP:
memcpy(wcn->hal_buf, buf, len);
wcn->hal_rsp_len = len;
complete(&wcn->hal_rsp_compl);
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.h b/drivers/net/wireless/ath/wcn36xx/smd.h
index cdf4231efe26..90c7faea0ef6 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.h
+++ b/drivers/net/wireless/ath/wcn36xx/smd.h
@@ -156,4 +156,7 @@ int wcn36xx_smd_ipv6_ns_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
int wcn36xx_smd_gtk_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
bool enable);

+int wcn36xx_smd_gtk_offload_get_info(struct wcn36xx *wcn,
+ struct ieee80211_vif *vif);
+
#endif /* _SMD_H_ */
--
2.30.1

2021-06-01 02:50:24

by Bryan O'Donoghue

[permalink] [raw]
Subject: [PATCH v4 10/12] wcn36xx: Add Host suspend indication support

In order to activate ipv4 ARP offload, ipv6 NS offload and firmware GTK
offload we need to send a unidirectional indication from host to wcn
indicating a transition to suspend.

Once done, firmware will respond to ARP broadcasts, ipv6 NS lookups and
perform GTK rekeys without waking the host.

Signed-off-by: Bryan O'Donoghue <[email protected]>
Tested-by: Benjamin Li <[email protected]>
---
drivers/net/wireless/ath/wcn36xx/main.c | 3 +++
drivers/net/wireless/ath/wcn36xx/smd.c | 19 +++++++++++++++++++
drivers/net/wireless/ath/wcn36xx/smd.h | 2 ++
3 files changed, 24 insertions(+)

diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index 8e5d8326d551..e4d5e4d597f9 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -1125,6 +1125,9 @@ static int wcn36xx_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wow)
if (ret)
goto out;
ret = wcn36xx_smd_set_power_params(wcn, true);
+ if (ret)
+ goto out;
+ ret = wcn36xx_smd_wlan_host_suspend_ind(wcn);
}
out:
mutex_unlock(&wcn->conf_mutex);
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index e249971c4ef7..302877d23ecf 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -2964,6 +2964,25 @@ int wcn36xx_smd_gtk_offload_get_info(struct wcn36xx *wcn,
return ret;
}

+int wcn36xx_smd_wlan_host_suspend_ind(struct wcn36xx *wcn)
+{
+ struct wcn36xx_hal_wlan_host_suspend_ind_msg msg_body;
+ int ret;
+
+ mutex_lock(&wcn->hal_mutex);
+
+ INIT_HAL_MSG(msg_body, WCN36XX_HAL_HOST_SUSPEND_IND);
+ msg_body.configured_mcst_bcst_filter_setting = 0;
+ msg_body.active_session_count = 1;
+ PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
+
+ ret = rpmsg_send(wcn->smd_channel, wcn->hal_buf, msg_body.header.len);
+
+ mutex_unlock(&wcn->hal_mutex);
+
+ return ret;
+}
+
int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
void *buf, int len, void *priv, u32 addr)
{
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.h b/drivers/net/wireless/ath/wcn36xx/smd.h
index 90c7faea0ef6..2909facdb100 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.h
+++ b/drivers/net/wireless/ath/wcn36xx/smd.h
@@ -159,4 +159,6 @@ int wcn36xx_smd_gtk_offload(struct wcn36xx *wcn, struct ieee80211_vif *vif,
int wcn36xx_smd_gtk_offload_get_info(struct wcn36xx *wcn,
struct ieee80211_vif *vif);

+int wcn36xx_smd_wlan_host_suspend_ind(struct wcn36xx *wcn);
+
#endif /* _SMD_H_ */
--
2.30.1