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Message-Id: <20250627-sm-misc-api-v1-v1-5-2b99481fe825@nxp.com>
Date: Fri, 27 Jun 2025 14:03:48 +0800
From: Peng Fan <peng.fan@....com>
To: Sudeep Holla <sudeep.holla@....com>,
Cristian Marussi <cristian.marussi@....com>,
Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>
Cc: arm-scmi@...r.kernel.org, imx@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Peng Fan <peng.fan@....com>
Subject: [PATCH 5/7] firmware: arm_scmi: imx: Support getting syslog of
MISC protocol
MISC protocol supports getting system log regarding system sleep latency
,wakeup interrupt and etc. Add the API for user to retrieve the
information from SM.
Signed-off-by: Peng Fan <peng.fan@....com>
---
.../firmware/arm_scmi/vendors/imx/imx-sm-misc.c | 78 ++++++++++++++++++++++
include/linux/scmi_imx_protocol.h | 19 ++++++
2 files changed, 97 insertions(+)
diff --git a/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c b/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
index d5b24bc4d4ca6c19f4cddfaea6e9d9b32a4c92f7..1a6d75357b76ce6bb7d06461999b368c27f1fa43 100644
--- a/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
+++ b/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
@@ -28,6 +28,7 @@ enum scmi_imx_misc_protocol_cmd {
SCMI_IMX_MISC_DISCOVER_BUILDINFO = 0x6,
SCMI_IMX_MISC_SI_INFO = 0xB,
SCMI_IMX_MISC_CFG_INFO = 0xC,
+ SCMI_IMX_MISC_SYSLOG = 0xD,
SCMI_IMX_MISC_CTRL_NOTIFY = 0x8,
};
@@ -87,6 +88,19 @@ struct scmi_imx_misc_si_info_out {
u8 siname[MISC_MAX_SINAME];
};
+struct scmi_imx_misc_syslog_in {
+ __le32 flags;
+ __le32 index;
+};
+
+#define REMAINING(x) le32_get_bits((x), GENMASK(31, 20))
+#define RETURNED(x) le32_get_bits((x), GENMASK(11, 0))
+
+struct scmi_imx_misc_syslog_out {
+ __le32 numlogflags;
+ __le32 syslog[];
+};
+
static int scmi_imx_misc_attributes_get(const struct scmi_protocol_handle *ph,
struct scmi_imx_misc_info *mi)
{
@@ -368,6 +382,69 @@ static int scmi_imx_misc_silicon_info(const struct scmi_protocol_handle *ph,
return ret;
}
+struct scmi_imx_misc_syslog_ipriv {
+ u32 *array;
+};
+
+static void iter_misc_syslog_prepare_message(void *message, u32 desc_index,
+ const void *priv)
+{
+ struct scmi_imx_misc_syslog_in *msg = message;
+
+ msg->flags = cpu_to_le32(0);
+ msg->index = cpu_to_le32(desc_index);
+}
+
+static int iter_misc_syslog_update_state(struct scmi_iterator_state *st,
+ const void *response, void *priv)
+{
+ const struct scmi_imx_misc_syslog_out *r = response;
+
+ st->num_returned = RETURNED(r->numlogflags);
+ st->num_remaining = REMAINING(r->numlogflags);
+
+ return 0;
+}
+
+static int
+iter_misc_syslog_process_response(const struct scmi_protocol_handle *ph,
+ const void *response,
+ struct scmi_iterator_state *st, void *priv)
+{
+ const struct scmi_imx_misc_syslog_out *r = response;
+ struct scmi_imx_misc_syslog_ipriv *p = priv;
+
+ p->array[st->desc_index + st->loop_idx] =
+ le32_to_cpu(r->syslog[st->loop_idx]);
+
+ return 0;
+}
+
+static int scmi_imx_misc_syslog(const struct scmi_protocol_handle *ph, u16 size,
+ void *array)
+{
+ struct scmi_iterator_ops ops = {
+ .prepare_message = iter_misc_syslog_prepare_message,
+ .update_state = iter_misc_syslog_update_state,
+ .process_response = iter_misc_syslog_process_response,
+ };
+ struct scmi_imx_misc_syslog_ipriv ipriv = {
+ .array = array,
+ };
+ void *iter;
+
+ if (!array || !size)
+ return -EINVAL;
+
+ iter = ph->hops->iter_response_init(ph, &ops, size, SCMI_IMX_MISC_SYSLOG,
+ sizeof(struct scmi_imx_misc_syslog_in),
+ &ipriv);
+ if (IS_ERR(iter))
+ return PTR_ERR(iter);
+
+ return ph->hops->iter_response_run(iter);
+}
+
static const struct scmi_imx_misc_proto_ops scmi_imx_misc_proto_ops = {
.misc_cfg_info = scmi_imx_misc_cfg_info,
.misc_ctrl_set = scmi_imx_misc_ctrl_set,
@@ -375,6 +452,7 @@ static const struct scmi_imx_misc_proto_ops scmi_imx_misc_proto_ops = {
.misc_ctrl_req_notify = scmi_imx_misc_ctrl_notify,
.misc_discover_build_info = scmi_imx_discover_build_info,
.misc_silicon_info = scmi_imx_misc_silicon_info,
+ .misc_syslog = scmi_imx_misc_syslog,
};
static int scmi_imx_misc_protocol_init(const struct scmi_protocol_handle *ph)
diff --git a/include/linux/scmi_imx_protocol.h b/include/linux/scmi_imx_protocol.h
index 0e639dfb5d16e281e2ccf006a63694b316c431f4..ff34d974046aa982fa9f5d46fc673412e01a532d 100644
--- a/include/linux/scmi_imx_protocol.h
+++ b/include/linux/scmi_imx_protocol.h
@@ -71,6 +71,23 @@ struct scmi_imx_misc_system_info {
u8 siname[MISC_MAX_SINAME];
};
+struct scmi_imx_misc_sys_sleep_rec {
+ u32 sleepentryusec;
+ u32 sleepexitusec;
+ u32 sleepcnt;
+ u32 wakesource;
+ u32 mixpwrstat;
+ u32 mempwrstat;
+ u32 pllpwrstat;
+ u32 syssleepmode;
+ u32 syssleepflags;
+};
+
+struct scmi_imx_misc_syslog {
+ struct scmi_imx_misc_sys_sleep_rec syssleeprecord;
+ uint32_t deverrlog;
+};
+
struct scmi_imx_misc_proto_ops {
int (*misc_cfg_info)(const struct scmi_protocol_handle *ph,
struct scmi_imx_misc_system_info *info);
@@ -84,6 +101,8 @@ struct scmi_imx_misc_proto_ops {
struct scmi_imx_misc_system_info *info);
int (*misc_silicon_info)(const struct scmi_protocol_handle *ph,
struct scmi_imx_misc_system_info *info);
+ int (*misc_syslog)(const struct scmi_protocol_handle *ph, u16 size,
+ void *array);
};
/* See LMM_ATTRIBUTES in imx95.rst */
--
2.37.1
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