Re: [RFC 7/7] ath10k: Handle rx thread suspend and resume
From: Sebastian Gottschall
Date: Thu Jul 23 2020 - 19:06:33 EST
your patch seem to only affect the WCN3990 chipset. all other ath10k
supported chipset are not supported here. so you see a chance to
implement this more generic?
Sebastian
Am 21.07.2020 um 19:14 schrieb Rakesh Pillai:
During the system suspend or resume, the rx thread
also needs to be suspended or resume respectively.
Handle the rx thread as well during the system
suspend and resume.
Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.3.1-01040-QCAHLSWMTPLZ-1
Signed-off-by: Rakesh Pillai <pillair@xxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath10k/core.c | 23 ++++++++++++++++++
drivers/net/wireless/ath/ath10k/core.h | 5 ++++
drivers/net/wireless/ath/ath10k/snoc.c | 44 +++++++++++++++++++++++++++++++++-
3 files changed, 71 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 4064fa2..b82b355 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -668,6 +668,27 @@ static unsigned int ath10k_core_get_fw_feature_str(char *buf,
return scnprintf(buf, buf_len, "%s", ath10k_core_fw_feature_str[feat]);
}
+int ath10k_core_thread_suspend(struct ath10k_thread *thread)
+{
+ ath10k_dbg(thread->ar, ATH10K_DBG_BOOT, "Suspending thread %s\n",
+ thread->name);
+ set_bit(ATH10K_THREAD_EVENT_SUSPEND, thread->event_flags);
+ wait_for_completion(&thread->suspend);
+
+ return 0;
+}
+EXPORT_SYMBOL(ath10k_core_thread_suspend);
+
+int ath10k_core_thread_resume(struct ath10k_thread *thread)
+{
+ ath10k_dbg(thread->ar, ATH10K_DBG_BOOT, "Resuming thread %s\n",
+ thread->name);
+ complete(&thread->resume);
+
+ return 0;
+}
+EXPORT_SYMBOL(ath10k_core_thread_resume);
+
void ath10k_core_thread_post_event(struct ath10k_thread *thread,
enum ath10k_thread_events event)
{
@@ -700,6 +721,8 @@ int ath10k_core_thread_init(struct ath10k *ar,
init_waitqueue_head(&thread->wait_q);
init_completion(&thread->shutdown);
+ init_completion(&thread->suspend);
+ init_completion(&thread->resume);
memcpy(thread->name, thread_name, ATH10K_THREAD_NAME_SIZE_MAX);
clear_bit(ATH10K_THREAD_EVENT_SHUTDOWN, thread->event_flags);
ath10k_info(ar, "Starting thread %s\n", thread_name);
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 596d31b..df65e75 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -976,6 +976,7 @@ enum ath10k_thread_events {
ATH10K_THREAD_EVENT_SHUTDOWN,
ATH10K_THREAD_EVENT_RX_POST,
ATH10K_THREAD_EVENT_TX_POST,
+ ATH10K_THREAD_EVENT_SUSPEND,
ATH10K_THREAD_EVENT_MAX,
};
@@ -983,6 +984,8 @@ struct ath10k_thread {
struct ath10k *ar;
struct task_struct *task;
struct completion shutdown;
+ struct completion suspend;
+ struct completion resume;
wait_queue_head_t wait_q;
DECLARE_BITMAP(event_flags, ATH10K_THREAD_EVENT_MAX);
char name[ATH10K_THREAD_NAME_SIZE_MAX];
@@ -1296,6 +1299,8 @@ static inline bool ath10k_peer_stats_enabled(struct ath10k *ar)
extern unsigned long ath10k_coredump_mask;
+int ath10k_core_thread_suspend(struct ath10k_thread *thread);
+int ath10k_core_thread_resume(struct ath10k_thread *thread);
void ath10k_core_thread_post_event(struct ath10k_thread *thread,
enum ath10k_thread_events event);
int ath10k_core_thread_shutdown(struct ath10k *ar,
diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
index 3eb5eac..a373b2b 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.c
+++ b/drivers/net/wireless/ath/ath10k/snoc.c
@@ -932,13 +932,31 @@ int ath10k_snoc_rx_thread_loop(void *data)
rx_thread->event_flags) ||
test_and_clear_bit(ATH10K_THREAD_EVENT_TX_POST,
rx_thread->event_flags) ||
+ test_bit(ATH10K_THREAD_EVENT_SUSPEND,
+ rx_thread->event_flags) ||
test_bit(ATH10K_THREAD_EVENT_SHUTDOWN,
rx_thread->event_flags)));
+ if (test_and_clear_bit(ATH10K_THREAD_EVENT_SUSPEND,
+ rx_thread->event_flags)) {
+ complete(&rx_thread->suspend);
+ ath10k_info(ar, "rx thread suspend\n");
+ wait_for_completion(&rx_thread->resume);
+ ath10k_info(ar, "rx thread resume\n");
+ }
+
ath10k_htt_txrx_compl_task(ar, thread_budget);
if (test_and_clear_bit(ATH10K_THREAD_EVENT_SHUTDOWN,
rx_thread->event_flags))
shutdown = true;
+
+ if (test_and_clear_bit(ATH10K_THREAD_EVENT_SUSPEND,
+ rx_thread->event_flags)) {
+ complete(&rx_thread->suspend);
+ ath10k_info(ar, "rx thread suspend\n");
+ wait_for_completion(&rx_thread->resume);
+ ath10k_info(ar, "rx thread resume\n");
+ }
}
ath10k_dbg(ar, ATH10K_DBG_SNOC, "rx thread exiting\n");
@@ -1133,15 +1151,30 @@ static int ath10k_snoc_hif_suspend(struct ath10k *ar)
if (!device_may_wakeup(ar->dev))
return -EPERM;
+ if (ar->rx_thread_enable) {
+ ret = ath10k_core_thread_suspend(&ar->rx_thread);
+ if (ret) {
+ ath10k_err(ar, "failed to suspend rx_thread, %d\n",
+ ret);
+ return ret;
+ }
+ }
+
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;
+ goto fail;
}
ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc device suspended\n");
return ret;
+
+fail:
+ if (ar->rx_thread_enable)
+ ath10k_core_thread_resume(&ar->rx_thread);
+
+ return ret;
}
static int ath10k_snoc_hif_resume(struct ath10k *ar)
@@ -1158,6 +1191,15 @@ static int ath10k_snoc_hif_resume(struct ath10k *ar)
return ret;
}
+ if (ar->rx_thread_enable) {
+ ret = ath10k_core_thread_resume(&ar->rx_thread);
+ if (ret) {
+ ath10k_err(ar, "failed to suspend rx_thread, %d\n",
+ ret);
+ return ret;
+ }
+ }
+
ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc device resumed\n");
return ret;