[PATCH v2 0/3] Add support for suspend/resume and WOW for WCN3990 chipset

[PATCH v2 0/3] Add support for suspend/resume and WOW for WCN3990 chipset

[Govind Singh]

This series adds support for driver suspend/resume and wake over wlan support
for WCN3990 chipset. CE2 is configured as wakeup source before driver suspend
and FW can wake up application processor on Magic packet/Deauth/AP lost.

change since v1:
  Log enhancement in "ath10k: Enable bus layer suspend/resume for WCN3990" patch.

Govind Singh (3):
  ath10k: Enable bus layer suspend/resume for WCN3990
  ath10k: Disable interface pause wow config for integrated chipset
  ath10k: Request credit report if flow control enabled on ep

 drivers/net/wireless/ath/ath10k/htc.c     |  3 +-
 drivers/net/wireless/ath/ath10k/snoc.c    | 45 +++++++++++++++++++++++
 drivers/net/wireless/ath/ath10k/wmi-tlv.c |  2 +
 drivers/net/wireless/ath/ath10k/wmi-tlv.h |  7 ++++
 4 files changed, 56 insertions(+), 1 deletion(-)

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

[PATCH v2 1/3] ath10k: Enable bus layer suspend/resume for WCN3990

[Govind Singh]

Register snoc bus layer suspend/resume PM ops and configure
the wakeup source(CE2) for the device.

Testing:
    Tested on WCN3990 HW.
    Tested FW: WLAN.HL.2.0-01192-QCAHLSWMTPLZ-1.

Signed-off-by: Govind Singh <govinds@codeaurora.org>
---
 drivers/net/wireless/ath/ath10k/snoc.c | 45 ++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
index bdef3d00f3f4..3f935c5ce8a8 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.c
+++ b/drivers/net/wireless/ath/ath10k/snoc.c
@@ -30,6 +30,7 @@
 
 #define ATH10K_SNOC_RX_POST_RETRY_MS 50
 #define CE_POLL_PIPE 4
+#define ATH10K_SNOC_WAKE_IRQ 2
 
 static char *const ce_name[] = {
 	"WLAN_CE_0",
@@ -1025,6 +1026,46 @@ static int ath10k_snoc_hif_power_up(struct ath10k *ar)
 	return ret;
 }
 
+#ifdef CONFIG_PM
+static int ath10k_snoc_hif_suspend(struct ath10k *ar)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	int ret;
+
+	if (!device_may_wakeup(ar->dev))
+		return -EPERM;
+
+	ret = enable_irq_wake(ar_snoc->ce_irqs[ATH10K_SNOC_WAKE_IRQ].irq_line);
+	if (ret) {
+		ath10k_err(ar, "failed to enable wakeup irq :%d\n", ret);
+		return ret;
+	}
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc device suspended\n");
+
+	return ret;
+}
+
+static int ath10k_snoc_hif_resume(struct ath10k *ar)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	int ret;
+
+	if (!device_may_wakeup(ar->dev))
+		return -EPERM;
+
+	ret = disable_irq_wake(ar_snoc->ce_irqs[ATH10K_SNOC_WAKE_IRQ].irq_line);
+	if (ret) {
+		ath10k_err(ar, "failed to disable wakeup irq: %d\n", ret);
+		return ret;
+	}
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc device resumed\n");
+
+	return ret;
+}
+#endif
+
 static const struct ath10k_hif_ops ath10k_snoc_hif_ops = {
 	.read32		= ath10k_snoc_read32,
 	.write32	= ath10k_snoc_write32,
@@ -1038,6 +1079,10 @@ static const struct ath10k_hif_ops ath10k_snoc_hif_ops = {
 	.send_complete_check	= ath10k_snoc_hif_send_complete_check,
 	.get_free_queue_number	= ath10k_snoc_hif_get_free_queue_number,
 	.get_target_info	= ath10k_snoc_hif_get_target_info,
+#ifdef CONFIG_PM
+	.suspend                = ath10k_snoc_hif_suspend,
+	.resume                 = ath10k_snoc_hif_resume,
+#endif
 };
 
 static const struct ath10k_bus_ops ath10k_snoc_bus_ops = {
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

[PATCH v2 2/3] ath10k: Disable interface pause wow config for integrated chipset

[Govind Singh]

wow pause iface config controls the PCI D0/D3-WOW cases for pcie
bus state. Firmware does not expects WOW_IFACE_PAUSE_ENABLED config
for bus/link that cannot be suspended ex:snoc and does not trigger
common subsystem shutdown.
Disable interface pause wow config for integrated chipset(WCN3990)
for correct WOW configuration in the firmware.

Testing:
    Tested on WCN3990 HW.
    Tested FW: WLAN.HL.2.0-01192-QCAHLSWMTPLZ-1.

Signed-off-by: Govind Singh <govinds@codeaurora.org>
---
 drivers/net/wireless/ath/ath10k/wmi-tlv.c | 2 ++
 drivers/net/wireless/ath/ath10k/wmi-tlv.h | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/wmi-tlv.c b/drivers/net/wireless/ath/ath10k/wmi-tlv.c
index 8c49a26fc571..1e608ef6499c 100644
--- a/drivers/net/wireless/ath/ath10k/wmi-tlv.c
+++ b/drivers/net/wireless/ath/ath10k/wmi-tlv.c
@@ -3185,6 +3185,8 @@ ath10k_wmi_tlv_op_gen_wow_enable(struct ath10k *ar)
 	cmd = (void *)tlv->value;
 
 	cmd->enable = __cpu_to_le32(1);
+	if (ar->hif.bus == ATH10K_BUS_SNOC)
+		cmd->pause_iface_config = WOW_IFACE_PAUSE_DISABLED;
 
 	ath10k_dbg(ar, ATH10K_DBG_WMI, "wmi tlv wow enable\n");
 	return skb;
diff --git a/drivers/net/wireless/ath/ath10k/wmi-tlv.h b/drivers/net/wireless/ath/ath10k/wmi-tlv.h
index 3e1e340cd834..a8bdb5614b9b 100644
--- a/drivers/net/wireless/ath/ath10k/wmi-tlv.h
+++ b/drivers/net/wireless/ath/ath10k/wmi-tlv.h
@@ -1968,8 +1968,15 @@ struct wmi_tlv_set_quiet_cmd {
 	__le32 enabled;
 } __packed;
 
+enum wmi_tlv_wow_interface_cfg {
+	WOW_IFACE_PAUSE_ENABLED,
+	WOW_IFACE_PAUSE_DISABLED
+};
+
 struct wmi_tlv_wow_enable_cmd {
 	__le32 enable;
+	__le32 pause_iface_config;
+	__le32 flags;
 } __packed;
 
 struct wmi_tlv_wow_host_wakeup_ind {
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

Re: [PATCH v2 2/3] ath10k: Disable interface pause wow config for integrated chipset

[Kalle Valo]

Govind Singh <govinds@codeaurora.org> wrote:

> wow pause iface config controls the PCI D0/D3-WOW cases for pcie
> bus state. Firmware does not expects WOW_IFACE_PAUSE_ENABLED config
> for bus/link that cannot be suspended ex:snoc and does not trigger
> common subsystem shutdown.
> Disable interface pause wow config for integrated chipset(WCN3990)
> for correct WOW configuration in the firmware.
> 
> Testing:
>     Tested on WCN3990 HW.
>     Tested FW: WLAN.HL.2.0-01192-QCAHLSWMTPLZ-1.
> 
> Signed-off-by: Govind Singh <govinds@codeaurora.org>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

This introduced a new warning:

drivers/net/wireless/ath/ath10k/wmi-tlv.c:3263:41: warning: incorrect type in assignment (different base types)
drivers/net/wireless/ath/ath10k/wmi-tlv.c:3263:41:    expected restricted __le32 [usertype] pause_iface_config
drivers/net/wireless/ath/ath10k/wmi-tlv.c:3263:41:    got int

I fixed it in the pending branch:

https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=pending&id=22aab99eaf71dadc3cf2e8a2b982986a40ca641e

-- 
https://patchwork.kernel.org/patch/10638235/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

[PATCH v2 3/3] ath10k: Request credit report if flow control enabled on ep

[Govind Singh]

FW credit flow control is enabled for only WMI ctrl
service(CE3) but credit update is requested unconditionally
on all HTC services as part of HTC tx in CE3/CE0/CE4.

This is causing WOW failure as FW is not expecting credit
report request on other end-points(CE0/CE4).

Request credit report only on those endpoints where
credit flow control is enabled.

Testing:
    Tested on WCN3990 HW.
    Tested FW: WLAN.HL.2.0-01192-QCAHLSWMTPLZ-1.

Signed-off-by: Govind Singh <govinds@codeaurora.org>
---
 drivers/net/wireless/ath/ath10k/htc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath10k/htc.c b/drivers/net/wireless/ath/ath10k/htc.c
index 8902720b4e49..31f1a316be7c 100644
--- a/drivers/net/wireless/ath/ath10k/htc.c
+++ b/drivers/net/wireless/ath/ath10k/htc.c
@@ -87,7 +87,8 @@ static void ath10k_htc_prepare_tx_skb(struct ath10k_htc_ep *ep,
 	hdr->eid = ep->eid;
 	hdr->len = __cpu_to_le16(skb->len - sizeof(*hdr));
 	hdr->flags = 0;
-	hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE;
+	if (ep->tx_credit_flow_enabled)
+		hdr->flags |= ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE;
 
 	spin_lock_bh(&ep->htc->tx_lock);
 	hdr->seq_no = ep->seq_no++;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project