diff mbox series

[v9,7/8] wifi: ath12k: refactor core start based on hardware group

Message ID 20240628095139.292952-8-quic_hprem@quicinc.com
State New
Headers show
Series wifi: ath12k: Introduce device group abstraction | expand

Commit Message

Harshitha Prem June 28, 2024, 9:51 a.m. UTC 
From: Karthikeyan Periyasamy <quic_periyasa@quicinc.com>

Currently, mac allocate/register and core_pdev_create are initiated
immediately when QMI firmware ready event is received for a particular
device.

With hardware device group abstraction, QMI firmware ready event can be
received simultaneously for different devices in the group and so, it
should not be registered immediately rather it has to be deferred until
all devices in the group has received QMI firmware ready.

To handle this, refactor the code of core start to move the following
apis inside a wrapper ath12k_core_hw_group_start()
        * ath12k_mac_allocate()
        * ath12k_core_pdev_create()
        * ath12k_core_rfkill_config()
        * ath12k_mac_register()
        * ath12k_hif_irq_enable()

similarly, move the corresponding destroy/unregister/disable apis
inside wrapper ath12k_core_hw_group_stop()

Add the device flags to indicate pdev created and IRQ enabled which would
be helpful for device clean up during failure cases.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4

Signed-off-by: Karthikeyan Periyasamy <quic_periyasa@quicinc.com>
Co-developed-by: Harshitha Prem <quic_hprem@quicinc.com>
Signed-off-by: Harshitha Prem <quic_hprem@quicinc.com>
---
 drivers/net/wireless/ath/ath12k/core.c | 194 ++++++++++++++++++-------
 drivers/net/wireless/ath/ath12k/core.h |  25 ++++
 drivers/net/wireless/ath/ath12k/qmi.c  |   4 +-
 3 files changed, 171 insertions(+), 52 deletions(-)

Comments

Jeff Johnson July 1, 2024, 11:42 p.m. UTC | #1 
On 6/28/2024 2:51 AM, Harshitha Prem wrote:
> From: Karthikeyan Periyasamy <quic_periyasa@quicinc.com>
> 
> Currently, mac allocate/register and core_pdev_create are initiated
> immediately when QMI firmware ready event is received for a particular
> device.
> 
> With hardware device group abstraction, QMI firmware ready event can be
> received simultaneously for different devices in the group and so, it
> should not be registered immediately rather it has to be deferred until
> all devices in the group has received QMI firmware ready.
> 
> To handle this, refactor the code of core start to move the following
> apis inside a wrapper ath12k_core_hw_group_start()
>         * ath12k_mac_allocate()
>         * ath12k_core_pdev_create()
>         * ath12k_core_rfkill_config()
>         * ath12k_mac_register()
>         * ath12k_hif_irq_enable()
> 
> similarly, move the corresponding destroy/unregister/disable apis
> inside wrapper ath12k_core_hw_group_stop()
> 
> Add the device flags to indicate pdev created and IRQ enabled which would
> be helpful for device clean up during failure cases.
> 
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
> 
> Signed-off-by: Karthikeyan Periyasamy <quic_periyasa@quicinc.com>
> Co-developed-by: Harshitha Prem <quic_hprem@quicinc.com>
> Signed-off-by: Harshitha Prem <quic_hprem@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
diff mbox series

Patch

diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c
index a12591d5ea7f..d1b5472c1a24 100644
--- a/drivers/net/wireless/ath/ath12k/core.c
+++ b/drivers/net/wireless/ath/ath12k/core.c
@@ -602,6 +602,8 @@  u32 ath12k_core_get_max_num_tids(struct ath12k_base *ab)
 
 static void ath12k_core_stop(struct ath12k_base *ab)
 {
+	ath12k_dec_num_core_started(ab);
+
 	if (!test_bit(ATH12K_FLAG_CRASH_FLUSH, &ab->dev_flags))
 		ath12k_qmi_firmware_stop(ab);
 
@@ -741,6 +743,8 @@  static int ath12k_core_start(struct ath12k_base *ab,
 {
 	int ret;
 
+	lockdep_assert_held(&ab->core_lock);
+
 	ret = ath12k_wmi_attach(ab);
 	if (ret) {
 		ath12k_err(ab, "failed to attach wmi: %d\n", ret);
@@ -834,6 +838,10 @@  static int ath12k_core_start(struct ath12k_base *ab,
 		/* ACPI is optional so continue in case of an error */
 		ath12k_dbg(ab, ATH12K_DBG_BOOT, "acpi failed: %d\n", ret);
 
+	if (!test_bit(ATH12K_FLAG_RECOVERY, &ab->dev_flags))
+		/* Indicate the core start in the appropriate group */
+		ath12k_inc_num_core_started(ab);
+
 	return 0;
 
 err_reo_cleanup:
@@ -845,6 +853,96 @@  static int ath12k_core_start(struct ath12k_base *ab,
 	return ret;
 }
 
+static void ath12k_core_device_cleanup(struct ath12k_base *ab)
+{
+	mutex_lock(&ab->core_lock);
+
+	ath12k_hif_irq_disable(ab);
+	ath12k_core_pdev_destroy(ab);
+	ath12k_mac_unregister(ab);
+	ath12k_mac_destroy(ab);
+
+	mutex_unlock(&ab->core_lock);
+}
+
+static void ath12k_core_hw_group_stop(struct ath12k_hw_group *ag)
+{
+	struct ath12k_base *ab;
+	int i;
+
+	lockdep_assert_held(&ag->mutex_lock);
+
+	for (i = ag->num_devices - 1; i >= 0; i--) {
+		ab = ag->ab[i];
+		if (!ab)
+			continue;
+		ath12k_core_device_cleanup(ab);
+	}
+}
+
+static int ath12k_core_hw_group_start(struct ath12k_hw_group *ag)
+{
+	struct ath12k_base *ab;
+	int ret, i;
+
+	lockdep_assert_held(&ag->mutex_lock);
+
+	for (i = 0; i < ag->num_devices; i++) {
+		ab = ag->ab[i];
+		if (!ab)
+			continue;
+
+		mutex_lock(&ab->core_lock);
+
+		/* Check if already registered or not, since same flow
+		 * execute for HW restart case.
+		 */
+		if (test_bit(ATH12K_FLAG_REGISTERED, &ab->dev_flags))
+			goto core_pdev_create;
+
+		ret = ath12k_mac_allocate(ab);
+		if (ret) {
+			ath12k_err(ab, "failed to create new hw device with mac80211 :%d\n",
+				   ret);
+			mutex_unlock(&ab->core_lock);
+			return ret;
+		}
+
+		ret = ath12k_mac_register(ab);
+		if (ret) {
+			ath12k_err(ab, "failed to register radio with mac80211: %d\n",
+				   ret);
+			mutex_unlock(&ab->core_lock);
+			goto err;
+		}
+
+core_pdev_create:
+		ret = ath12k_core_pdev_create(ab);
+		if (ret) {
+			ath12k_err(ab, "failed to create pdev core %d\n", ret);
+			mutex_unlock(&ab->core_lock);
+			goto err;
+		}
+
+		ath12k_hif_irq_enable(ab);
+
+		ret = ath12k_core_rfkill_config(ab);
+		if (ret && ret != -EOPNOTSUPP) {
+			mutex_unlock(&ab->core_lock);
+			goto err;
+		}
+
+		mutex_unlock(&ab->core_lock);
+	}
+
+	return 0;
+
+err:
+	ath12k_core_hw_group_stop(ag);
+
+	return ret;
+}
+
 static int ath12k_core_start_firmware(struct ath12k_base *ab,
 				      enum ath12k_firmware_mode mode)
 {
@@ -862,9 +960,18 @@  static int ath12k_core_start_firmware(struct ath12k_base *ab,
 	return ret;
 }
 
+static inline
+bool ath12k_core_hw_group_start_ready(struct ath12k_hw_group *ag)
+{
+	lockdep_assert_held(&ag->mutex_lock);
+
+	return (ag->num_started == ag->num_devices);
+}
+
 int ath12k_core_qmi_firmware_ready(struct ath12k_base *ab)
 {
-	int ret;
+	struct ath12k_hw_group *ag = ath12k_ab_to_ag(ab);
+	int ret, i;
 
 	ret = ath12k_core_start_firmware(ab, ATH12K_FIRMWARE_MODE_NORMAL);
 	if (ret) {
@@ -884,59 +991,47 @@  int ath12k_core_qmi_firmware_ready(struct ath12k_base *ab)
 		goto err_firmware_stop;
 	}
 
+	mutex_lock(&ag->mutex_lock);
 	mutex_lock(&ab->core_lock);
 	ret = ath12k_core_start(ab, ATH12K_FIRMWARE_MODE_NORMAL);
 	if (ret) {
 		ath12k_err(ab, "failed to start core: %d\n", ret);
 		goto err_dp_free;
 	}
+	mutex_unlock(&ab->core_lock);
 
-	ret = ath12k_mac_allocate(ab);
-	if (ret) {
-		ath12k_err(ab, "failed to create new hw device with mac80211 :%d\n",
-			   ret);
-		goto err_core_stop;
-	}
-
-	ret = ath12k_mac_register(ab);
-	if (ret) {
-		ath12k_err(ab, "failed register the radio with mac80211: %d\n", ret);
-		goto err_mac_destroy;
+	if (ath12k_core_hw_group_start_ready(ag)) {
+		ret = ath12k_core_hw_group_start(ag);
+		if (ret) {
+			ath12k_warn(ab, "unable to start hw group\n");
+			goto err_core_stop;
+		}
+		ath12k_dbg(ab, ATH12K_DBG_BOOT, "group %d started\n", ag->id);
 	}
+	mutex_unlock(&ag->mutex_lock);
 
-	ret = ath12k_core_pdev_create(ab);
-	if (ret) {
-		ath12k_err(ab, "failed to create pdev core: %d\n", ret);
-		goto err_mac_unregister;
-	}
+	return 0;
 
-	ath12k_hif_irq_enable(ab);
+err_core_stop:
+	for (i = ag->num_devices - 1; i >= 0; i--) {
+		ab = ag->ab[i];
+		if (!ab)
+			continue;
 
-	ret = ath12k_core_rfkill_config(ab);
-	if (ret && ret != -EOPNOTSUPP) {
-		ath12k_err(ab, "failed to config rfkill: %d\n", ret);
-		goto err_core_pdev_destroy;
+		mutex_lock(&ab->core_lock);
+		ath12k_core_stop(ab);
+		mutex_unlock(&ab->core_lock);
 	}
+	goto exit;
 
-	mutex_unlock(&ab->core_lock);
-
-	return 0;
-
-err_core_pdev_destroy:
-	ath12k_hif_irq_disable(ab);
-	ath12k_core_pdev_destroy(ab);
-err_mac_unregister:
-	ath12k_mac_unregister(ab);
-err_mac_destroy:
-	ath12k_mac_destroy(ab);
-err_core_stop:
-	ath12k_core_stop(ab);
 err_dp_free:
 	ath12k_dp_free(ab);
 	mutex_unlock(&ab->core_lock);
 err_firmware_stop:
 	ath12k_qmi_firmware_stop(ab);
 
+exit:
+	mutex_unlock(&ag->mutex_lock);
 	return ret;
 }
 
@@ -1134,6 +1229,14 @@  static void ath12k_core_restart(struct work_struct *work)
 	}
 
 	if (ab->is_reset) {
+		if (!test_bit(ATH12K_FLAG_REGISTERED, &ab->dev_flags)) {
+			atomic_dec(&ab->reset_count);
+			complete(&ab->reset_complete);
+			ab->is_reset = false;
+			atomic_set(&ab->fail_cont_count, 0);
+			ath12k_dbg(ab, ATH12K_DBG_BOOT, "reset success\n");
+		}
+
 		for (i = 0; i < ath12k_get_num_hw(ab); i++) {
 			ah = ath12k_ab_to_ah(ab, i);
 			ieee80211_restart_hw(ah->hw);
@@ -1317,7 +1420,7 @@  static struct ath12k_hw_group *ath12k_core_assign_hw_group(struct ath12k_base *a
 
 void ath12k_core_unassign_hw_group(struct ath12k_base *ab)
 {
-	struct ath12k_hw_group *ag = ab->ag;
+	struct ath12k_hw_group *ag = ath12k_ab_to_ag(ab);
 	u8 device_id = ab->device_id;
 	int num_probed;
 
@@ -1351,19 +1454,6 @@  void ath12k_core_unassign_hw_group(struct ath12k_base *ab)
 		ath12k_core_hw_group_free(ag);
 }
 
-static void ath12k_core_device_cleanup(struct ath12k_base *ab)
-{
-	mutex_lock(&ab->core_lock);
-
-	ath12k_hif_irq_disable(ab);
-	ath12k_core_pdev_destroy(ab);
-	ath12k_mac_unregister(ab);
-	ath12k_mac_destroy(ab);
-	ath12k_core_stop(ab);
-
-	mutex_unlock(&ab->core_lock);
-}
-
 static void ath12k_core_hw_group_destroy(struct ath12k_hw_group *ag)
 {
 	struct ath12k_base *ab;
@@ -1390,12 +1480,16 @@  static void ath12k_core_hw_group_cleanup(struct ath12k_hw_group *ag)
 		return;
 
 	mutex_lock(&ag->mutex_lock);
+	ath12k_core_hw_group_stop(ag);
+
 	for (i = 0; i < ag->num_devices; i++) {
 		ab = ag->ab[i];
 		if (!ab)
 			continue;
 
-		ath12k_core_device_cleanup(ab);
+		mutex_lock(&ab->core_lock);
+		ath12k_core_stop(ab);
+		mutex_unlock(&ab->core_lock);
 	}
 	mutex_unlock(&ag->mutex_lock);
 }
diff --git a/drivers/net/wireless/ath/ath12k/core.h b/drivers/net/wireless/ath/ath12k/core.h
index 9be71027993c..b834982254bc 100644
--- a/drivers/net/wireless/ath/ath12k/core.h
+++ b/drivers/net/wireless/ath/ath12k/core.h
@@ -750,6 +750,8 @@  struct ath12k_hw_group {
 	u8 id;
 	u8 num_devices;
 	u8 num_probed;
+	u8 num_started;
+	unsigned long flags;
 	struct ath12k_base *ab[ATH12K_MAX_SOCS];
 
 	/* When multiple devices are involved in a group, QMI handshakes would be
@@ -1113,4 +1115,27 @@  static inline int ath12k_get_num_hw(struct ath12k_base *ab)
 {
 	return ab->num_hw;
 }
+
+static inline
+struct ath12k_hw_group *ath12k_ab_to_ag(struct ath12k_base *ab)
+{
+	return ab->ag;
+}
+
+static inline
+void ath12k_inc_num_core_started(struct ath12k_base *ab)
+{
+	lockdep_assert_held(&ab->ag->mutex_lock);
+
+	ab->ag->num_started++;
+}
+
+static inline
+void ath12k_dec_num_core_started(struct ath12k_base *ab)
+{
+	lockdep_assert_held(&ab->ag->mutex_lock);
+
+	ab->ag->num_started--;
+}
+
 #endif /* _CORE_H_ */
diff --git a/drivers/net/wireless/ath/ath12k/qmi.c b/drivers/net/wireless/ath/ath12k/qmi.c
index b69d1e55f52a..047393bc8bea 100644
--- a/drivers/net/wireless/ath/ath12k/qmi.c
+++ b/drivers/net/wireless/ath/ath12k/qmi.c
@@ -3308,7 +3308,6 @@  static void ath12k_qmi_driver_event_work(struct work_struct *work)
 			break;
 		case ATH12K_QMI_EVENT_SERVER_EXIT:
 			set_bit(ATH12K_FLAG_CRASH_FLUSH, &ab->dev_flags);
-			set_bit(ATH12K_FLAG_RECOVERY, &ab->dev_flags);
 			break;
 		case ATH12K_QMI_EVENT_REQUEST_MEM:
 			ret = ath12k_qmi_event_mem_request(qmi);
@@ -3325,13 +3324,14 @@  static void ath12k_qmi_driver_event_work(struct work_struct *work)
 			if (test_bit(ATH12K_FLAG_QMI_FW_READY_COMPLETE, &ab->dev_flags)) {
 				if (ab->is_reset)
 					ath12k_hal_dump_srng_stats(ab);
+
+				set_bit(ATH12K_FLAG_RECOVERY, &ab->dev_flags);
 				queue_work(ab->workqueue, &ab->restart_work);
 				break;
 			}
 
 			clear_bit(ATH12K_FLAG_CRASH_FLUSH,
 				  &ab->dev_flags);
-			clear_bit(ATH12K_FLAG_RECOVERY, &ab->dev_flags);
 			ret = ath12k_core_qmi_firmware_ready(ab);
 			if (!ret)
 				set_bit(ATH12K_FLAG_QMI_FW_READY_COMPLETE,