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Message-Id: <20210922233341.182624-1-swboyd@chromium.org>
Date: Wed, 22 Sep 2021 16:33:41 -0700
From: Stephen Boyd <swboyd@...omium.org>
To: Kalle Valo <kvalo@...eaurora.org>
Cc: linux-kernel@...r.kernel.org, ath10k@...ts.infradead.org,
linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
linux-arm-msm@...r.kernel.org,
Youghandhar Chintala <youghand@...eaurora.org>,
Abhishek Kumar <kuabhs@...omium.org>,
Steev Klimaszewski <steev@...i.org>,
Matthias Kaehlcke <mka@...omium.org>,
Rakesh Pillai <pillair@...eaurora.org>
Subject: [PATCH v3] ath10k: Don't always treat modem stop events as crashes
When rebooting on sc7180 Trogdor devices I see the following crash from
the wifi driver.
ath10k_snoc 18800000.wifi: firmware crashed! (guid 83493570-29a2-4e98-a83e-70048c47669c)
This is because a modem stop event looks just like a firmware crash to
the driver, the qmi connection is closed in both cases. Use the qcom ssr
notifier block to stop treating the qmi connection close event as a
firmware crash signal when the modem hasn't actually crashed. See
ath10k_qmi_event_server_exit() for more details.
This silences the crash message seen during every reboot.
Fixes: 3f14b73c3843 ("ath10k: Enable MSA region dump support for WCN3990")
Cc: Youghandhar Chintala <youghand@...eaurora.org>
Cc: Abhishek Kumar <kuabhs@...omium.org>
Cc: Steev Klimaszewski <steev@...i.org>
Cc: Matthias Kaehlcke <mka@...omium.org>
Cc: Rakesh Pillai <pillair@...eaurora.org>
Signed-off-by: Stephen Boyd <swboyd@...omium.org>
---
Changes since v2 (https://lore.kernel.org/r/20210913205313.3420049-1-swboyd@chromium.org):
* Use a new bit instead of overloading unregistering
Changes since v1 (https://lore.kernel.org/r/20210905210400.1157870-1-swboyd@chromium.org):
* Push error message into function instead of checking at callsite
drivers/net/wireless/ath/ath10k/qmi.c | 3 +-
drivers/net/wireless/ath/ath10k/snoc.c | 77 ++++++++++++++++++++++++++
drivers/net/wireless/ath/ath10k/snoc.h | 5 ++
3 files changed, 84 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath10k/qmi.c b/drivers/net/wireless/ath/ath10k/qmi.c
index 07e478f9a808..80fcb917fe4e 100644
--- a/drivers/net/wireless/ath/ath10k/qmi.c
+++ b/drivers/net/wireless/ath/ath10k/qmi.c
@@ -864,7 +864,8 @@ static void ath10k_qmi_event_server_exit(struct ath10k_qmi *qmi)
ath10k_qmi_remove_msa_permission(qmi);
ath10k_core_free_board_files(ar);
- if (!test_bit(ATH10K_SNOC_FLAG_UNREGISTERING, &ar_snoc->flags))
+ if (!test_bit(ATH10K_SNOC_FLAG_UNREGISTERING, &ar_snoc->flags) &&
+ !test_bit(ATH10K_SNOC_FLAG_MODEM_STOPPED, &ar_snoc->flags))
ath10k_snoc_fw_crashed_dump(ar);
ath10k_snoc_fw_indication(ar, ATH10K_QMI_EVENT_FW_DOWN_IND);
diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
index ea00fbb15601..9513ab696fff 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.c
+++ b/drivers/net/wireless/ath/ath10k/snoc.c
@@ -12,6 +12,7 @@
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>
+#include <linux/remoteproc/qcom_rproc.h>
#include <linux/of_address.h>
#include <linux/iommu.h>
@@ -1477,6 +1478,74 @@ void ath10k_snoc_fw_crashed_dump(struct ath10k *ar)
mutex_unlock(&ar->dump_mutex);
}
+static int ath10k_snoc_modem_notify(struct notifier_block *nb, unsigned long action,
+ void *data)
+{
+ struct ath10k_snoc *ar_snoc = container_of(nb, struct ath10k_snoc, nb);
+ struct ath10k *ar = ar_snoc->ar;
+ struct qcom_ssr_notify_data *notify_data = data;
+
+ switch (action) {
+ case QCOM_SSR_BEFORE_POWERUP:
+ ath10k_dbg(ar, ATH10K_DBG_SNOC, "received modem starting event\n");
+ clear_bit(ATH10K_SNOC_FLAG_MODEM_STOPPED, &ar_snoc->flags);
+ break;
+
+ case QCOM_SSR_AFTER_POWERUP:
+ ath10k_dbg(ar, ATH10K_DBG_SNOC, "received modem running event\n");
+ break;
+
+ case QCOM_SSR_BEFORE_SHUTDOWN:
+ ath10k_dbg(ar, ATH10K_DBG_SNOC, "received modem %s event\n",
+ notify_data->crashed ? "crashed" : "stopping");
+ if (!notify_data->crashed)
+ set_bit(ATH10K_SNOC_FLAG_MODEM_STOPPED, &ar_snoc->flags);
+ else
+ clear_bit(ATH10K_SNOC_FLAG_MODEM_STOPPED, &ar_snoc->flags);
+ break;
+
+ case QCOM_SSR_AFTER_SHUTDOWN:
+ ath10k_dbg(ar, ATH10K_DBG_SNOC, "received modem offline event\n");
+ break;
+
+ default:
+ ath10k_err(ar, "received unrecognized event %lu\n", action);
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+static int ath10k_modem_init(struct ath10k *ar)
+{
+ struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+ void *notifier;
+ int ret;
+
+ ar_snoc->nb.notifier_call = ath10k_snoc_modem_notify;
+
+ notifier = qcom_register_ssr_notifier("mpss", &ar_snoc->nb);
+ if (IS_ERR(notifier)) {
+ ret = PTR_ERR(notifier);
+ ath10k_err(ar, "failed to initialize modem notifier: %d\n", ret);
+ return ret;
+ }
+
+ ar_snoc->notifier = notifier;
+
+ return 0;
+}
+
+static void ath10k_modem_deinit(struct ath10k *ar)
+{
+ int ret;
+ struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+
+ ret = qcom_unregister_ssr_notifier(ar_snoc->notifier, &ar_snoc->nb);
+ if (ret)
+ ath10k_err(ar, "error %d unregistering notifier\n", ret);
+}
+
static int ath10k_setup_msa_resources(struct ath10k *ar, u32 msa_size)
{
struct device *dev = ar->dev;
@@ -1740,10 +1809,17 @@ static int ath10k_snoc_probe(struct platform_device *pdev)
goto err_fw_deinit;
}
+ ret = ath10k_modem_init(ar);
+ if (ret)
+ goto err_qmi_deinit;
+
ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc probe\n");
return 0;
+err_qmi_deinit:
+ ath10k_qmi_deinit(ar);
+
err_fw_deinit:
ath10k_fw_deinit(ar);
@@ -1771,6 +1847,7 @@ static int ath10k_snoc_free_resources(struct ath10k *ar)
ath10k_fw_deinit(ar);
ath10k_snoc_free_irq(ar);
ath10k_snoc_release_resource(ar);
+ ath10k_modem_deinit(ar);
ath10k_qmi_deinit(ar);
ath10k_core_destroy(ar);
diff --git a/drivers/net/wireless/ath/ath10k/snoc.h b/drivers/net/wireless/ath/ath10k/snoc.h
index 5095d1893681..d4bce1707696 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.h
+++ b/drivers/net/wireless/ath/ath10k/snoc.h
@@ -6,6 +6,8 @@
#ifndef _SNOC_H_
#define _SNOC_H_
+#include <linux/notifier.h>
+
#include "hw.h"
#include "ce.h"
#include "qmi.h"
@@ -45,6 +47,7 @@ struct ath10k_snoc_ce_irq {
enum ath10k_snoc_flags {
ATH10K_SNOC_FLAG_REGISTERED,
ATH10K_SNOC_FLAG_UNREGISTERING,
+ ATH10K_SNOC_FLAG_MODEM_STOPPED,
ATH10K_SNOC_FLAG_RECOVERY,
ATH10K_SNOC_FLAG_8BIT_HOST_CAP_QUIRK,
};
@@ -75,6 +78,8 @@ struct ath10k_snoc {
struct clk_bulk_data *clks;
size_t num_clks;
struct ath10k_qmi *qmi;
+ struct notifier_block nb;
+ void *notifier;
unsigned long flags;
bool xo_cal_supported;
u32 xo_cal_data;
base-commit: e4e737bb5c170df6135a127739a9e6148ee3da82
--
https://chromeos.dev
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