Currently, WLAN chip is powered once during driver probe and is kept
ON (powered) always even when WLAN is not active; keeping the chip
powered ON all the time will consume extra power which is not
desirable for a battery operated device. Same is the case with non-WoW
suspend, chip will never be put into low power mode when the system is
suspended resulting in higher battery drain.
As per the recommendation, sending a PDEV suspend WMI command followed
by a QMI MODE OFF command will cease all WLAN activity and put the device
in low power mode. When WLAN interfaces are brought up, sending a QMI
MISSION MODE command would be sufficient to bring the chip out of low
power. This is a better approach than doing hif_power_down()/hif_power_up()
for every WiFi ON/OFF sequence since the turnaround time for entry/exit of
low power mode is much less. Overhead is just the time taken for sending
QMI MODE OFF & QMI MISSION MODE commands instead of going through the
entire chip boot & QMI init sequence.
Currently the changes are applicable only for WCN6750. This can be
extended to other targets with a future patch.
Tested-on: WCN6750 hw1.0 AHB WLAN.MSL.1.0.1-00887-QCAMSLSWPLZ-1
Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.16
Signed-off-by: Manikanta Pubbisetty <quic_mpubbise@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath11k/ahb.c | 45 +++++
drivers/net/wireless/ath/ath11k/core.c | 225 ++++++++++++++++++++-----
drivers/net/wireless/ath/ath11k/core.h | 4 +
drivers/net/wireless/ath/ath11k/hif.h | 11 ++
drivers/net/wireless/ath/ath11k/mac.c | 8 +-
drivers/net/wireless/ath/ath11k/pci.c | 26 +++
6 files changed, 275 insertions(+), 44 deletions(-)
diff --git a/drivers/net/wireless/ath/ath11k/ahb.c b/drivers/net/wireless/ath/ath11k/ahb.c
index d34a4d6325b2..5fe375014ecb 100644
--- a/drivers/net/wireless/ath/ath11k/ahb.c
+++ b/drivers/net/wireless/ath/ath11k/ahb.c
@@ -191,6 +191,47 @@ static const struct ath11k_pci_ops ath11k_ahb_pci_ops_wcn6750 = {
.window_read32 = ath11k_ahb_window_read32_wcn6750,
};
+static int ath11k_ahb_core_start_wcn6750(struct ath11k_base *ab)
+{
+ /* Initialize the hardware/firmware only for the first PDEV
+ * or during hardware recovery.
+ */
+ if (!test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags) &&
+ ath11k_core_any_pdevs_on(ab))
+ return 0;
+
+ return ath11k_core_start_device(ab);
+}
+
+static void ath11k_ahb_core_stop_wcn6750(struct ath11k_base *ab)
+{
+ return ath11k_core_stop_device(ab);
+}
+
+static int ath11k_ahb_core_start_ipq8074(struct ath11k_base *ab)
+{
+ /* TODO: Currently initializing the hardware/firmware only
+ * during hardware recovery. Support to shutdown/turn-on
+ * the hardware during Wi-Fi OFF/ON will be added later.
+ */
+ if (!test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags))
+ return 0;
+
+ return ath11k_core_start_device(ab);
+}
+
+static void ath11k_ahb_core_stop_ipq8074(struct ath11k_base *ab)
+{
+ /* TODO: Currently stopping the hardware/firmware only
+ * during driver unload. Support to shutdown/turn-on
+ * the hardware during Wi-Fi OFF/ON will be added later.
+ */
+ if (!test_bit(ATH11K_FLAG_UNREGISTERING, &ab->dev_flags))
+ return;
+
+ return ath11k_core_stop_device(ab);
+}
+
static inline u32 ath11k_ahb_read32(struct ath11k_base *ab, u32 offset)
{
return ioread32(ab->mem + offset);
@@ -778,6 +819,8 @@ static const struct ath11k_hif_ops ath11k_ahb_hif_ops_ipq8074 = {
.map_service_to_pipe = ath11k_ahb_map_service_to_pipe,
.power_down = ath11k_ahb_power_down,
.power_up = ath11k_ahb_power_up,
+ .core_start = ath11k_ahb_core_start_ipq8074,
+ .core_stop = ath11k_ahb_core_stop_ipq8074,
};
static const struct ath11k_hif_ops ath11k_ahb_hif_ops_wcn6750 = {
@@ -797,6 +840,8 @@ static const struct ath11k_hif_ops ath11k_ahb_hif_ops_wcn6750 = {
.resume = ath11k_ahb_hif_resume,
.ce_irq_enable = ath11k_pci_enable_ce_irqs_except_wake_irq,
.ce_irq_disable = ath11k_pci_disable_ce_irqs_except_wake_irq,
+ .core_start = ath11k_ahb_core_start_wcn6750,
+ .core_stop = ath11k_ahb_core_stop_wcn6750,
};
static int ath11k_core_get_rproc(struct ath11k_base *ab)
diff --git a/drivers/net/wireless/ath/ath11k/core.c b/drivers/net/wireless/ath/ath11k/core.c
index d36e193b2db9..f64bf42048a3 100644
--- a/drivers/net/wireless/ath/ath11k/core.c
+++ b/drivers/net/wireless/ath/ath11k/core.c
@@ -1299,7 +1299,6 @@ static int ath11k_core_soc_create(struct ath11k_base *ab)
static void ath11k_core_soc_destroy(struct ath11k_base *ab)
{
ath11k_debugfs_soc_destroy(ab);
- ath11k_dp_free(ab);
ath11k_reg_free(ab);
ath11k_qmi_deinit_service(ab);
}
@@ -1320,31 +1319,14 @@ static int ath11k_core_pdev_create(struct ath11k_base *ab)
goto err_pdev_debug;
}
- ret = ath11k_mac_register(ab);
- if (ret) {
- ath11k_err(ab, "failed register the radio with mac80211: %d\n", ret);
- goto err_dp_pdev_free;
- }
-
- ret = ath11k_thermal_register(ab);
- if (ret) {
- ath11k_err(ab, "could not register thermal device: %d\n",
- ret);
- goto err_mac_unregister;
- }
-
ret = ath11k_spectral_init(ab);
if (ret) {
ath11k_err(ab, "failed to init spectral %d\n", ret);
- goto err_thermal_unregister;
+ goto err_dp_pdev_free;
}
return 0;
-err_thermal_unregister:
- ath11k_thermal_unregister(ab);
-err_mac_unregister:
- ath11k_mac_unregister(ab);
err_dp_pdev_free:
ath11k_dp_pdev_free(ab);
err_pdev_debug:
@@ -1355,11 +1337,8 @@ static int ath11k_core_pdev_create(struct ath11k_base *ab)
static void ath11k_core_pdev_destroy(struct ath11k_base *ab)
{
- ath11k_spectral_deinit(ab);
ath11k_thermal_unregister(ab);
ath11k_mac_unregister(ab);
- ath11k_hif_irq_disable(ab);
- ath11k_dp_pdev_free(ab);
ath11k_debugfs_pdev_destroy(ab);
}
@@ -1491,26 +1470,20 @@ static int ath11k_core_start_firmware(struct ath11k_base *ab,
return ret;
}
-int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab)
+static int ath11k_core_setup_resources(struct ath11k_base *ab)
{
int ret;
- ret = ath11k_core_start_firmware(ab, ATH11K_FIRMWARE_MODE_NORMAL);
- if (ret) {
- ath11k_err(ab, "failed to start firmware: %d\n", ret);
- return ret;
- }
-
ret = ath11k_ce_init_pipes(ab);
if (ret) {
ath11k_err(ab, "failed to initialize CE: %d\n", ret);
- goto err_firmware_stop;
+ return ret;
}
ret = ath11k_dp_alloc(ab);
if (ret) {
ath11k_err(ab, "failed to init DP: %d\n", ret);
- goto err_firmware_stop;
+ return ret;
}
switch (ath11k_crypto_mode) {
@@ -1524,17 +1497,47 @@ int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab)
break;
default:
ath11k_info(ab, "invalid crypto_mode: %d\n", ath11k_crypto_mode);
- return -EINVAL;
+ ret = -EINVAL;
+ goto err_dp_free;
}
if (ath11k_frame_mode == ATH11K_HW_TXRX_RAW)
set_bit(ATH11K_FLAG_RAW_MODE, &ab->dev_flags);
+ return 0;
+
+err_dp_free:
+ ath11k_dp_free(ab);
+
+ return ret;
+}
+
+static void ath11k_core_free_resources(struct ath11k_base *ab)
+{
+ ath11k_dp_free(ab);
+}
+
+static int ath11k_core_setup_device(struct ath11k_base *ab)
+{
+ int ret;
+
+ ret = ath11k_core_start_firmware(ab, ATH11K_FIRMWARE_MODE_NORMAL);
+ if (ret) {
+ ath11k_err(ab, "failed to start firmware: %d\n", ret);
+ return ret;
+ }
+
+ ret = ath11k_core_setup_resources(ab);
+ if (ret) {
+ ath11k_err(ab, "failed to setup resources: %d\n", ret);
+ goto err_firmware_stop;
+ }
+
mutex_lock(&ab->core_lock);
ret = ath11k_core_start(ab);
if (ret) {
ath11k_err(ab, "failed to start core: %d\n", ret);
- goto err_dp_free;
+ goto err_free_resources;
}
ret = ath11k_core_pdev_create(ab);
@@ -1542,7 +1545,10 @@ int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab)
ath11k_err(ab, "failed to create pdev core: %d\n", ret);
goto err_core_stop;
}
+
ath11k_hif_irq_enable(ab);
+ ath11k_hif_core_stop(ab);
+
mutex_unlock(&ab->core_lock);
return 0;
@@ -1550,8 +1556,8 @@ int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab)
err_core_stop:
ath11k_core_stop(ab);
ath11k_mac_destroy(ab);
-err_dp_free:
- ath11k_dp_free(ab);
+err_free_resources:
+ ath11k_core_free_resources(ab);
mutex_unlock(&ab->core_lock);
err_firmware_stop:
ath11k_qmi_firmware_stop(ab);
@@ -1559,10 +1565,43 @@ int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab)
return ret;
}
+int ath11k_core_qmi_firmware_ready(struct ath11k_base *ab)
+{
+ int ret;
+
+ ret = ath11k_core_setup_device(ab);
+ if (ret) {
+ ath11k_err(ab, "failed to setup device: %d\n", ret);
+ return ret;
+ }
+
+ ret = ath11k_mac_register(ab);
+ if (ret) {
+ ath11k_err(ab, "failed register the radio with mac80211: %d\n", ret);
+ goto err_free_device;
+ }
+
+ ret = ath11k_thermal_register(ab);
+ if (ret) {
+ ath11k_err(ab, "could not register thermal device: %d\n",
+ ret);
+ goto err_mac_unregister;
+ }
+
+ return 0;
+
+err_mac_unregister:
+ ath11k_mac_unregister(ab);
+err_free_device:
+ ath11k_core_stop_device(ab);
+ ath11k_mac_destroy(ab);
+
+ return ret;
+}
+
static void ath11k_core_reconfigure_on_crash(struct ath11k_base *ab)
{
mutex_lock(&ab->core_lock);
- ath11k_thermal_unregister(ab);
ath11k_hif_irq_disable(ab);
ath11k_dp_pdev_free(ab);
ath11k_spectral_deinit(ab);
@@ -1837,7 +1876,6 @@ void ath11k_core_deinit(struct ath11k_base *ab)
mutex_lock(&ab->core_lock);
ath11k_core_pdev_destroy(ab);
- ath11k_core_stop(ab);
mutex_unlock(&ab->core_lock);
@@ -1905,37 +1943,140 @@ struct ath11k_base *ath11k_core_alloc(struct device *dev, size_t priv_size,
}
EXPORT_SYMBOL(ath11k_core_alloc);
+static int ath11k_core_suspend_target(struct ath11k_base *ab, u32 suspend_opt)
+{
+ struct ath11k *ar;
+ struct ath11k_pdev *pdev;
+ unsigned long time_left;
+ int ret;
+ int i;
+
+ for (i = 0; i < ab->num_radios; i++) {
+ pdev = &ab->pdevs[i];
+ ar = pdev->ar;
+
+ reinit_completion(&ab->htc_suspend);
+
+ ret = ath11k_wmi_pdev_suspend(ar, suspend_opt, pdev->pdev_id);
+ if (ret) {
+ ath11k_warn(ab, "could not suspend target (%d)\n", ret);
+ return ret;
+ }
+
+ time_left = wait_for_completion_timeout(&ab->htc_suspend, 3 * HZ);
+
+ if (!time_left) {
+ ath11k_warn(ab, "suspend timed out - target pause event never came\n");
+ return -ETIMEDOUT;
+ }
+ }
+
+ return 0;
+}
+
+void ath11k_core_stop_device(struct ath11k_base *ab)
+{
+ if (ab->core_stopped)
+ return;
+
+ ath11k_spectral_deinit(ab);
+ ath11k_core_suspend_target(ab, WMI_PDEV_SUSPEND_AND_DISABLE_INTR);
+ ath11k_hif_irq_disable(ab);
+ ath11k_hif_stop(ab);
+
+ if (!test_bit(ATH11K_FLAG_CRASH_FLUSH, &ab->dev_flags))
+ ath11k_qmi_firmware_stop(ab);
+
+ ath11k_wmi_detach(ab);
+ ath11k_dp_pdev_reo_cleanup(ab);
+ ath11k_dp_pdev_free(ab);
+ ath11k_dp_free(ab);
+
+ ab->core_stopped = true;
+}
+EXPORT_SYMBOL(ath11k_core_stop_device);
+
+int ath11k_core_any_pdevs_on(struct ath11k_base *ab)
+{
+ struct ath11k_pdev *pdev;
+ struct ath11k *ar;
+ int i;
+
+ for (i = 0; i < ab->num_radios; i++) {
+ pdev = &ab->pdevs[i];
+ ar = pdev->ar;
+ if (!ar)
+ continue;
+
+ if (ar->state == ATH11K_STATE_ON)
+ return true;
+ }
+
+ return false;
+}
+EXPORT_SYMBOL(ath11k_core_any_pdevs_on);
+
int ath11k_core_start_device(struct ath11k_base *ab)
{
int ret;
- if (!test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags))
- return 0;
+ mutex_lock(&ab->core_lock);
ath11k_hal_srng_deinit(ab);
ret = ath11k_hal_srng_init(ab);
if (ret) {
ath11k_err(ab, "failed to init srng: %d\n", ret);
- return ret;
+ goto err_unlock;
}
clear_bit(ATH11K_FLAG_CRASH_FLUSH, &ab->dev_flags);
- ret = ath11k_core_qmi_firmware_ready(ab);
+ ret = ath11k_core_start_firmware(ab, ATH11K_FIRMWARE_MODE_NORMAL);
if (ret) {
- ath11k_err(ab, "failed to init core: %d\n", ret);
+ ath11k_err(ab, "failed to start firmware: %d\n", ret);
goto err_hal_srng_deinit;
}
+ ret = ath11k_core_setup_resources(ab);
+ if (ret) {
+ ath11k_err(ab, "failed to setup resources: %d\n", ret);
+ goto err_firmware_stop;
+ }
+
+ ret = ath11k_core_start(ab);
+ if (ret) {
+ ath11k_err(ab, "failed to start core: %d\n", ret);
+ goto err_free_resources;
+ }
+
+ ret = ath11k_core_pdev_create(ab);
+ if (ret) {
+ ath11k_err(ab, "failed to create pdev core: %d\n", ret);
+ goto err_core_stop;
+ }
+
+ ath11k_hif_irq_enable(ab);
clear_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags);
+ mutex_unlock(&ab->core_lock);
+
+ ab->core_stopped = false;
return 0;
+err_core_stop:
+ ath11k_core_stop(ab);
+err_free_resources:
+ ath11k_core_free_resources(ab);
+err_firmware_stop:
+ ath11k_qmi_firmware_stop(ab);
err_hal_srng_deinit:
ath11k_hal_srng_deinit(ab);
+err_unlock:
+ mutex_unlock(&ab->core_lock);
return ret;
}
+EXPORT_SYMBOL(ath11k_core_start_device);
MODULE_DESCRIPTION("Core module for Qualcomm Atheros 802.11ax wireless LAN cards.");
MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
index 9b55ac94b36c..338f6f71baa0 100644
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -964,6 +964,8 @@ struct ath11k_base {
const struct ath11k_pci_ops *ops;
} pci;
+ bool core_stopped;
+
/* must be last */
u8 drv_priv[] __aligned(sizeof(void *));
};
@@ -1156,6 +1158,8 @@ int ath11k_core_resume(struct ath11k_base *ab);
int ath11k_core_suspend(struct ath11k_base *ab);
void ath11k_core_pre_reconfigure_recovery(struct ath11k_base *ab);
int ath11k_core_start_device(struct ath11k_base *ab);
+void ath11k_core_stop_device(struct ath11k_base *ab);
+int ath11k_core_any_pdevs_on(struct ath11k_base *ab);
const struct firmware *ath11k_core_firmware_request(struct ath11k_base *ab,
const char *filename);
diff --git a/drivers/net/wireless/ath/ath11k/hif.h b/drivers/net/wireless/ath/ath11k/hif.h
index 659b80d2abd4..395b3dbf79b8 100644
--- a/drivers/net/wireless/ath/ath11k/hif.h
+++ b/drivers/net/wireless/ath/ath11k/hif.h
@@ -30,6 +30,8 @@ struct ath11k_hif_ops {
void (*ce_irq_enable)(struct ath11k_base *ab);
void (*ce_irq_disable)(struct ath11k_base *ab);
void (*get_ce_msi_idx)(struct ath11k_base *ab, u32 ce_id, u32 *msi_idx);
+ int (*core_start)(struct ath11k_base *ab);
+ void (*core_stop)(struct ath11k_base *ab);
};
static inline void ath11k_hif_ce_irq_enable(struct ath11k_base *ab)
@@ -145,4 +147,13 @@ static inline void ath11k_get_ce_msi_idx(struct ath11k_base *ab, u32 ce_id,
*msi_data_idx = ce_id;
}
+static inline int ath11k_hif_core_start(struct ath11k_base *ab)
+{
+ return ab->hif.ops->core_start(ab);
+}
+
+static inline void ath11k_hif_core_stop(struct ath11k_base *ab)
+{
+ return ab->hif.ops->core_stop(ab);
+}
#endif /* _HIF_H_ */
diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index c21ebf0578dc..31b794ea52ad 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -5797,9 +5797,9 @@ static int ath11k_mac_op_start(struct ieee80211_hw *hw)
ath11k_mac_drain_tx(ar);
- ret = ath11k_core_start_device(ab);
+ ret = ath11k_hif_core_start(ab);
if (ret) {
- ath11k_err(ab, "failed to start device : %d\n", ret);
+ ath11k_err(ab, "failed to start core : %d\n", ret);
return ret;
}
@@ -5960,6 +5960,10 @@ static void ath11k_mac_op_stop(struct ieee80211_hw *hw)
synchronize_rcu();
atomic_set(&ar->num_pending_mgmt_tx, 0);
+
+ /* If all PDEVs on the SoC are down, then power down the device */
+ if (!ath11k_core_any_pdevs_on(ar->ab))
+ ath11k_hif_core_stop(ar->ab);
}
static void
diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index 99cf3357c66e..be350ed671b7 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -680,6 +680,30 @@ static int ath11k_pci_start(struct ath11k_base *ab)
return 0;
}
+static int ath11k_pci_core_start(struct ath11k_base *ab)
+{
+ /* TODO: Currently initializing the hardware/firmware only
+ * during hardware recovery. Support to shutdown/turn-on
+ * the hardware during Wi-Fi OFF/ON will be added later.
+ */
+ if (!test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags))
+ return 0;
+
+ return ath11k_core_start_device(ab);
+}
+
+static void ath11k_pci_core_stop(struct ath11k_base *ab)
+{
+ /* TODO: Currently stopping the hardware/firmware only
+ * during driver unload. Support to shutdown/turn-on
+ * the hardware during Wi-Fi OFF/ON will be added later.
+ */
+ if (!test_bit(ATH11K_FLAG_UNREGISTERING, &ab->dev_flags))
+ return;
+
+ return ath11k_core_stop_device(ab);
+}
+
static const struct ath11k_hif_ops ath11k_pci_hif_ops = {
.start = ath11k_pci_start,
.stop = ath11k_pcic_stop,
@@ -698,6 +722,8 @@ static const struct ath11k_hif_ops ath11k_pci_hif_ops = {
.ce_irq_enable = ath11k_pci_hif_ce_irq_enable,
.ce_irq_disable = ath11k_pci_hif_ce_irq_disable,
.get_ce_msi_idx = ath11k_pcic_get_ce_msi_idx,
+ .core_start = ath11k_pci_core_start,
+ .core_stop = ath11k_pci_core_stop,
};
static void ath11k_pci_read_hw_version(struct ath11k_base *ab, u32 *major, u32 *minor)
--
2.38.0
