diff mbox series

[V3,1/7] remoteproc: qcom: pas: Add decrypt shutdown support for modem

Message ID 1657022900-2049-2-git-send-email-quic_sibis@quicinc.com
State Accepted
Commit 86590c308bffa035fb7fd5dbb13e424523223e0e
Headers show
Series Miscellaneous PAS fixes | expand

Commit Message

Sibi Sankar July 5, 2022, 12:08 p.m. UTC
The initial shutdown request to modem on SM8450 SoCs would start the
decryption process and will keep returning errors until the modem shutdown
is complete. Fix this by retrying shutdowns in fixed intervals.

Err Logs on modem shutdown:
qcom_q6v5_pas 4080000.remoteproc: failed to shutdown: -22
remoteproc remoteproc3: can't stop rproc: -22

Fixes: 5cef9b48458d ("remoteproc: qcom: pas: Add SM8450 remoteproc support")
Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
---

v3:
 * Fixup misc. suggestions and rename to adsp_shutdown_poll_decrypt() [Bjorn]

 drivers/remoteproc/qcom_q6v5_pas.c | 43 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

Comments

Konrad Dybcio July 6, 2022, 12:38 p.m. UTC | #1
On 5.07.2022 14:08, Sibi Sankar wrote:
> The initial shutdown request to modem on SM8450 SoCs would start the
> decryption process and will keep returning errors until the modem shutdown
> is complete. Fix this by retrying shutdowns in fixed intervals.
> 
I'm sorry, but this message seems a bit cryptic to me.. What
is being decrypted? How is it related to the shutdown sequence?
Why does it need to finish first?

Konrad

[snipped the rest]
Sibi Sankar July 7, 2022, 10:59 a.m. UTC | #2
Hey Konrad,
Thanks for taking time to review the series.


On 7/6/22 6:08 PM, Konrad Dybcio wrote:
> 
> 
> On 5.07.2022 14:08, Sibi Sankar wrote:
>> The initial shutdown request to modem on SM8450 SoCs would start the
>> decryption process and will keep returning errors until the modem shutdown
>> is complete. Fix this by retrying shutdowns in fixed intervals.
>>
> I'm sorry, but this message seems a bit cryptic to me.. What
> is being decrypted? How is it related to the shutdown sequence?
> Why does it need to finish first?

I was told some portions of the modem logs in secured modem regions
needs decryption and this needs to be completed before minidump/coredump
are collected.

-Sibi

> 
> Konrad
> 
> [snipped the rest]
>
diff mbox series

Patch

diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
index 6ae39c5653b1..297700f87fe8 100644
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -8,6 +8,7 @@ 
  */
 
 #include <linux/clk.h>
+#include <linux/delay.h>
 #include <linux/firmware.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
@@ -29,6 +30,8 @@ 
 #include "qcom_q6v5.h"
 #include "remoteproc_internal.h"
 
+#define ADSP_DECRYPT_SHUTDOWN_DELAY_MS	100
+
 struct adsp_data {
 	int crash_reason_smem;
 	const char *firmware_name;
@@ -36,6 +39,7 @@  struct adsp_data {
 	unsigned int minidump_id;
 	bool has_aggre2_clk;
 	bool auto_boot;
+	bool decrypt_shutdown;
 
 	char **proxy_pd_names;
 
@@ -65,6 +69,7 @@  struct qcom_adsp {
 	unsigned int minidump_id;
 	int crash_reason_smem;
 	bool has_aggre2_clk;
+	bool decrypt_shutdown;
 	const char *info_name;
 
 	struct completion start_done;
@@ -128,6 +133,19 @@  static void adsp_pds_disable(struct qcom_adsp *adsp, struct device **pds,
 	}
 }
 
+static int adsp_shutdown_poll_decrypt(struct qcom_adsp *adsp)
+{
+	unsigned int retry_num = 50;
+	int ret;
+
+	do {
+		msleep(ADSP_DECRYPT_SHUTDOWN_DELAY_MS);
+		ret = qcom_scm_pas_shutdown(adsp->pas_id);
+	} while (ret == -EINVAL && --retry_num);
+
+	return ret;
+}
+
 static int adsp_unprepare(struct rproc *rproc)
 {
 	struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
@@ -249,6 +267,9 @@  static int adsp_stop(struct rproc *rproc)
 		dev_err(adsp->dev, "timed out on wait\n");
 
 	ret = qcom_scm_pas_shutdown(adsp->pas_id);
+	if (ret && adsp->decrypt_shutdown)
+		ret = adsp_shutdown_poll_decrypt(adsp);
+
 	if (ret)
 		dev_err(adsp->dev, "failed to shutdown: %d\n", ret);
 
@@ -459,6 +480,7 @@  static int adsp_probe(struct platform_device *pdev)
 	adsp->pas_id = desc->pas_id;
 	adsp->has_aggre2_clk = desc->has_aggre2_clk;
 	adsp->info_name = desc->sysmon_name;
+	adsp->decrypt_shutdown = desc->decrypt_shutdown;
 	platform_set_drvdata(pdev, adsp);
 
 	device_wakeup_enable(adsp->dev);
@@ -877,6 +899,25 @@  static const struct adsp_data sdx55_mpss_resource = {
 	.ssctl_id = 0x22,
 };
 
+static const struct adsp_data sm8450_mpss_resource = {
+	.crash_reason_smem = 421,
+	.firmware_name = "modem.mdt",
+	.pas_id = 4,
+	.minidump_id = 3,
+	.has_aggre2_clk = false,
+	.auto_boot = false,
+	.decrypt_shutdown = true,
+	.proxy_pd_names = (char*[]){
+		"cx",
+		"mss",
+		NULL
+	},
+	.load_state = "modem",
+	.ssr_name = "mpss",
+	.sysmon_name = "modem",
+	.ssctl_id = 0x12,
+};
+
 static const struct of_device_id adsp_of_match[] = {
 	{ .compatible = "qcom,msm8226-adsp-pil", .data = &adsp_resource_init},
 	{ .compatible = "qcom,msm8974-adsp-pil", .data = &adsp_resource_init},
@@ -916,7 +957,7 @@  static const struct of_device_id adsp_of_match[] = {
 	{ .compatible = "qcom,sm8450-adsp-pas", .data = &sm8350_adsp_resource},
 	{ .compatible = "qcom,sm8450-cdsp-pas", .data = &sm8350_cdsp_resource},
 	{ .compatible = "qcom,sm8450-slpi-pas", .data = &sm8350_slpi_resource},
-	{ .compatible = "qcom,sm8450-mpss-pas", .data = &mpss_resource_init},
+	{ .compatible = "qcom,sm8450-mpss-pas", .data = &sm8450_mpss_resource},
 	{ },
 };
 MODULE_DEVICE_TABLE(of, adsp_of_match);