diff mbox series

[02/11] firmware: arm_scmi: hide protocols' private data

Message ID 20201014150545.44807-3-cristian.marussi@arm.com (mailing list archive)
State New, archived
Headers show
Series SCMI vendor protocols and modularization | expand

Commit Message

Cristian Marussi Oct. 14, 2020, 3:05 p.m. UTC 
Protocols private data were meant to be used exclusively by protocol code
but they are currently exposed through the handle, so available also to
SCMI drivers: move them away from handle into instance specific data and
provide internal helpers to let protocols implementation set/get their own
private data from protocol code.

Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
 drivers/firmware/arm_scmi/clock.c   | 12 +++++-----
 drivers/firmware/arm_scmi/common.h  |  4 ++++
 drivers/firmware/arm_scmi/driver.c  | 32 +++++++++++++++++++++++++++
 drivers/firmware/arm_scmi/perf.c    | 34 ++++++++++++++++++-----------
 drivers/firmware/arm_scmi/power.c   | 10 ++++-----
 drivers/firmware/arm_scmi/reset.c   | 16 ++++++++------
 drivers/firmware/arm_scmi/sensors.c | 13 ++++++-----
 drivers/firmware/arm_scmi/system.c  |  4 +---
 include/linux/scmi_protocol.h       | 17 ---------------
 9 files changed, 86 insertions(+), 56 deletions(-)

Comments

Florian Fainelli Oct. 14, 2020, 7:19 p.m. UTC | #1 
On 10/14/20 8:05 AM, Cristian Marussi wrote:
> Protocols private data were meant to be used exclusively by protocol code
> but they are currently exposed through the handle, so available also to
> SCMI drivers: move them away from handle into instance specific data and
> provide internal helpers to let protocols implementation set/get their own
> private data from protocol code.
> 
> Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>

[snip]


> diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c
> index 94bcad9a7d19..4e8dafc36d7e 100644
> --- a/drivers/firmware/arm_scmi/clock.c
> +++ b/drivers/firmware/arm_scmi/clock.c
> @@ -240,7 +240,8 @@ static int scmi_clock_rate_set(const struct scmi_handle *handle, u32 clk_id,
>  	u32 flags = 0;
>  	struct scmi_xfer *t;
>  	struct scmi_clock_set_rate *cfg;
> -	struct clock_info *ci = handle->clk_priv;
> +	struct clock_info *ci =
> +		scmi_get_proto_priv(handle, SCMI_PROTOCOL_CLOCK);

Having to repeat the protocol identifier is a bit error prone, does not
scale really and it will not change throughout the lifecycle of the
protocol handler. This is the least path of resistance though so it
makes sense you went that route for now.

Instead of exposing scmi_handle towards the various operations what you
could do is just pass down an encapsulating object which is comprised of
a scmi_handle reference and the protocol's private structure already
resolved?
Cristian Marussi Oct. 15, 2020, 8:52 a.m. UTC | #2 
On Wed, Oct 14, 2020 at 12:19:43PM -0700, Florian Fainelli wrote:
> On 10/14/20 8:05 AM, Cristian Marussi wrote:
> > Protocols private data were meant to be used exclusively by protocol code
> > but they are currently exposed through the handle, so available also to
> > SCMI drivers: move them away from handle into instance specific data and
> > provide internal helpers to let protocols implementation set/get their own
> > private data from protocol code.
> > 
> > Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
> 
> [snip]
> 
> 
> > diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c
> > index 94bcad9a7d19..4e8dafc36d7e 100644
> > --- a/drivers/firmware/arm_scmi/clock.c
> > +++ b/drivers/firmware/arm_scmi/clock.c
> > @@ -240,7 +240,8 @@ static int scmi_clock_rate_set(const struct scmi_handle *handle, u32 clk_id,
> >  	u32 flags = 0;
> >  	struct scmi_xfer *t;
> >  	struct scmi_clock_set_rate *cfg;
> > -	struct clock_info *ci = handle->clk_priv;
> > +	struct clock_info *ci =
> > +		scmi_get_proto_priv(handle, SCMI_PROTOCOL_CLOCK);
> 
> Having to repeat the protocol identifier is a bit error prone, does not
> scale really and it will not change throughout the lifecycle of the
> protocol handler. This is the least path of resistance though so it
> makes sense you went that route for now.
> 
> Instead of exposing scmi_handle towards the various operations what you
> could do is just pass down an encapsulating object which is comprised of
> a scmi_handle reference and the protocol's private structure already
> resolved?

That's really a good point.

Later on in the series when modularization is introduced you'll see that
I modified the protocol init callback to receive the core xfer_ops as a
parameter so that any protocol even if loaded as a module can use the
core xfer ops to built and generate SCMI msgs (without EXPORTing them),
but one thing which is not addressed by this series still, is the fact
that this way each protocol would have to specify for each of this ops
a protocol_id param, thing which, beside being cumbersome as you said,
lets the protocol potentially cheat, registering itself for protocol X
but then potentially building and sending SCMI msgs for any other
protocol: so your proposed solution could address also this case.

Thanks for the hint !

Cristian

> -- 
> Florian
diff mbox series

Patch

diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c
index 94bcad9a7d19..4e8dafc36d7e 100644
--- a/drivers/firmware/arm_scmi/clock.c
+++ b/drivers/firmware/arm_scmi/clock.c
@@ -240,7 +240,8 @@  static int scmi_clock_rate_set(const struct scmi_handle *handle, u32 clk_id,
 	u32 flags = 0;
 	struct scmi_xfer *t;
 	struct scmi_clock_set_rate *cfg;
-	struct clock_info *ci = handle->clk_priv;
+	struct clock_info *ci =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_CLOCK);
 
 	ret = scmi_xfer_get_init(handle, CLOCK_RATE_SET, SCMI_PROTOCOL_CLOCK,
 				 sizeof(*cfg), 0, &t);
@@ -303,7 +304,8 @@  static int scmi_clock_disable(const struct scmi_handle *handle, u32 clk_id)
 
 static int scmi_clock_count_get(const struct scmi_handle *handle)
 {
-	struct clock_info *ci = handle->clk_priv;
+	struct clock_info *ci =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_CLOCK);
 
 	return ci->num_clocks;
 }
@@ -311,7 +313,8 @@  static int scmi_clock_count_get(const struct scmi_handle *handle)
 static const struct scmi_clock_info *
 scmi_clock_info_get(const struct scmi_handle *handle, u32 clk_id)
 {
-	struct clock_info *ci = handle->clk_priv;
+	struct clock_info *ci =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_CLOCK);
 	struct scmi_clock_info *clk = ci->clk + clk_id;
 
 	if (!clk->name[0])
@@ -361,9 +364,8 @@  static int scmi_clock_protocol_init(struct scmi_handle *handle)
 
 	cinfo->version = version;
 	handle->clk_ops = &clk_ops;
-	handle->clk_priv = cinfo;
 
-	return 0;
+	return scmi_set_proto_priv(handle, SCMI_PROTOCOL_CLOCK, cinfo);
 }
 
 static struct scmi_protocol scmi_clock = {
diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h
index b08a8ddbc22a..de2f22032a57 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h
@@ -205,6 +205,10 @@  const struct scmi_protocol *scmi_get_protocol(int protocol_id);
 int scmi_acquire_protocol(struct scmi_handle *handle, u8 protocol_id);
 void scmi_release_protocol(struct scmi_handle *handle, u8 protocol_id);
 
+void *scmi_get_proto_priv(const struct scmi_handle *h, u8 prot);
+int scmi_set_proto_priv(const struct scmi_handle *handle, const u8 proto,
+			void *priv);
+
 /* SCMI Transport */
 /**
  * struct scmi_chan_info - Structure representing a SCMI channel information
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 7de994e49884..bad1d0130e96 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -100,6 +100,10 @@  struct scmi_protocol_instance {
  *	       this SCMI instance: populated on protocol's first attempted
  *	       usage.
  * @protocols_mtx: A mutex to protect protocols instances initialization.
+ * @protocols_private_data: An array of per-protocol per-instance private
+ *			    data: populated by protocol's initialization
+ *			    routines when @protocols is still not filled, so
+ *			    they have to sit on their own.
  * @protocols_imp: List of protocols implemented, currently maximum of
  *	MAX_PROTOCOLS_IMP elements allocated by the base protocol
  * @node: List head
@@ -117,6 +121,7 @@  struct scmi_info {
 	struct scmi_protocol_instance *protocols[SCMI_MAX_PROTO];
 	/* Ensure mutual exclusive access to protocols instance array */
 	struct mutex protocols_mtx;
+	void *protocols_private_data[SCMI_MAX_PROTO];
 	u8 *protocols_imp;
 	struct list_head node;
 	int users;
@@ -542,6 +547,32 @@  int scmi_version_get(const struct scmi_handle *handle, u8 protocol,
 	return ret;
 }
 
+int scmi_set_proto_priv(const struct scmi_handle *handle,
+			u8 protocol_id, void *priv)
+{
+	struct scmi_info *info = handle_to_scmi_info(handle);
+
+	/* Ensure protocols_private_data has been updated */
+	smp_rmb();
+	if (WARN_ON(info->protocols_private_data[protocol_id]))
+		return -EINVAL;
+
+	info->protocols_private_data[protocol_id] = priv;
+	/* Ensure updated protocol private date are visible */
+	smp_wmb();
+
+	return 0;
+}
+
+void *scmi_get_proto_priv(const struct scmi_handle *handle, u8 protocol_id)
+{
+	struct scmi_info *info = handle_to_scmi_info(handle);
+
+	/* Ensure protocols_private_data has been updated */
+	smp_rmb();
+	return info->protocols_private_data[protocol_id];
+}
+
 /**
  * scmi_get_protocol_instance  - Protocol initialization helper.
  * @handle: A reference to the SCMI platform instance.
@@ -657,6 +688,7 @@  void scmi_release_protocol(struct scmi_handle *handle, u8 protocol_id)
 		if (pi->proto->deinit)
 			pi->proto->deinit(handle);
 
+		info->protocols_private_data[protocol_id] = NULL;
 		info->protocols[protocol_id] = NULL;
 		/* Ensure deinitialized protocol is visible */
 		smp_wmb();
diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
index 854460a051c2..13e215f359fb 100644
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -379,7 +379,8 @@  static int scmi_perf_mb_limits_set(const struct scmi_handle *handle, u32 domain,
 static int scmi_perf_limits_set(const struct scmi_handle *handle, u32 domain,
 				u32 max_perf, u32 min_perf)
 {
-	struct scmi_perf_info *pi = handle->perf_priv;
+	struct scmi_perf_info *pi = scmi_get_proto_priv(handle,
+							SCMI_PROTOCOL_PERF);
 	struct perf_dom_info *dom = pi->dom_info + domain;
 
 	if (dom->fc_info && dom->fc_info->limit_set_addr) {
@@ -421,7 +422,8 @@  static int scmi_perf_mb_limits_get(const struct scmi_handle *handle, u32 domain,
 static int scmi_perf_limits_get(const struct scmi_handle *handle, u32 domain,
 				u32 *max_perf, u32 *min_perf)
 {
-	struct scmi_perf_info *pi = handle->perf_priv;
+	struct scmi_perf_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
 	struct perf_dom_info *dom = pi->dom_info + domain;
 
 	if (dom->fc_info && dom->fc_info->limit_get_addr) {
@@ -459,7 +461,8 @@  static int scmi_perf_mb_level_set(const struct scmi_handle *handle, u32 domain,
 static int scmi_perf_level_set(const struct scmi_handle *handle, u32 domain,
 			       u32 level, bool poll)
 {
-	struct scmi_perf_info *pi = handle->perf_priv;
+	struct scmi_perf_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
 	struct perf_dom_info *dom = pi->dom_info + domain;
 
 	if (dom->fc_info && dom->fc_info->level_set_addr) {
@@ -496,7 +499,8 @@  static int scmi_perf_mb_level_get(const struct scmi_handle *handle, u32 domain,
 static int scmi_perf_level_get(const struct scmi_handle *handle, u32 domain,
 			       u32 *level, bool poll)
 {
-	struct scmi_perf_info *pi = handle->perf_priv;
+	struct scmi_perf_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
 	struct perf_dom_info *dom = pi->dom_info + domain;
 
 	if (dom->fc_info && dom->fc_info->level_get_addr) {
@@ -647,7 +651,8 @@  static int scmi_dvfs_device_opps_add(const struct scmi_handle *handle,
 	unsigned long freq;
 	struct scmi_opp *opp;
 	struct perf_dom_info *dom;
-	struct scmi_perf_info *pi = handle->perf_priv;
+	struct scmi_perf_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
 
 	domain = scmi_dev_domain_id(dev);
 	if (domain < 0)
@@ -676,7 +681,8 @@  static int scmi_dvfs_transition_latency_get(const struct scmi_handle *handle,
 					    struct device *dev)
 {
 	struct perf_dom_info *dom;
-	struct scmi_perf_info *pi = handle->perf_priv;
+	struct scmi_perf_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
 	int domain = scmi_dev_domain_id(dev);
 
 	if (domain < 0)
@@ -690,7 +696,8 @@  static int scmi_dvfs_transition_latency_get(const struct scmi_handle *handle,
 static int scmi_dvfs_freq_set(const struct scmi_handle *handle, u32 domain,
 			      unsigned long freq, bool poll)
 {
-	struct scmi_perf_info *pi = handle->perf_priv;
+	struct scmi_perf_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
 	struct perf_dom_info *dom = pi->dom_info + domain;
 
 	return scmi_perf_level_set(handle, domain, freq / dom->mult_factor,
@@ -702,7 +709,8 @@  static int scmi_dvfs_freq_get(const struct scmi_handle *handle, u32 domain,
 {
 	int ret;
 	u32 level;
-	struct scmi_perf_info *pi = handle->perf_priv;
+	struct scmi_perf_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
 	struct perf_dom_info *dom = pi->dom_info + domain;
 
 	ret = scmi_perf_level_get(handle, domain, &level, poll);
@@ -715,7 +723,8 @@  static int scmi_dvfs_freq_get(const struct scmi_handle *handle, u32 domain,
 static int scmi_dvfs_est_power_get(const struct scmi_handle *handle, u32 domain,
 				   unsigned long *freq, unsigned long *power)
 {
-	struct scmi_perf_info *pi = handle->perf_priv;
+	struct scmi_perf_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
 	struct perf_dom_info *dom;
 	unsigned long opp_freq;
 	int idx, ret = -EINVAL;
@@ -743,7 +752,8 @@  static bool scmi_fast_switch_possible(const struct scmi_handle *handle,
 				      struct device *dev)
 {
 	struct perf_dom_info *dom;
-	struct scmi_perf_info *pi = handle->perf_priv;
+	struct scmi_perf_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_PERF);
 
 	dom = pi->dom_info + scmi_dev_domain_id(dev);
 
@@ -887,9 +897,7 @@  static int scmi_perf_protocol_init(struct scmi_handle *handle)
 
 	pinfo->version = version;
 	handle->perf_ops = &perf_ops;
-	handle->perf_priv = pinfo;
-
-	return 0;
+	return scmi_set_proto_priv(handle, SCMI_PROTOCOL_PERF, pinfo);
 }
 
 static struct scmi_protocol scmi_perf = {
diff --git a/drivers/firmware/arm_scmi/power.c b/drivers/firmware/arm_scmi/power.c
index 42c9c88da07c..e0b29ed4e09a 100644
--- a/drivers/firmware/arm_scmi/power.c
+++ b/drivers/firmware/arm_scmi/power.c
@@ -171,14 +171,16 @@  scmi_power_state_get(const struct scmi_handle *handle, u32 domain, u32 *state)
 
 static int scmi_power_num_domains_get(const struct scmi_handle *handle)
 {
-	struct scmi_power_info *pi = handle->power_priv;
+	struct scmi_power_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_POWER);
 
 	return pi->num_domains;
 }
 
 static char *scmi_power_name_get(const struct scmi_handle *handle, u32 domain)
 {
-	struct scmi_power_info *pi = handle->power_priv;
+	struct scmi_power_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_POWER);
 	struct power_dom_info *dom = pi->dom_info + domain;
 
 	return dom->name;
@@ -296,9 +298,7 @@  static int scmi_power_protocol_init(struct scmi_handle *handle)
 
 	pinfo->version = version;
 	handle->power_ops = &power_ops;
-	handle->power_priv = pinfo;
-
-	return 0;
+	return scmi_set_proto_priv(handle, SCMI_PROTOCOL_POWER, pinfo);
 }
 
 static struct scmi_protocol scmi_power = {
diff --git a/drivers/firmware/arm_scmi/reset.c b/drivers/firmware/arm_scmi/reset.c
index 2caf0bdb6fdc..f70e9b5108d5 100644
--- a/drivers/firmware/arm_scmi/reset.c
+++ b/drivers/firmware/arm_scmi/reset.c
@@ -121,14 +121,16 @@  scmi_reset_domain_attributes_get(const struct scmi_handle *handle, u32 domain,
 
 static int scmi_reset_num_domains_get(const struct scmi_handle *handle)
 {
-	struct scmi_reset_info *pi = handle->reset_priv;
+	struct scmi_reset_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_RESET);
 
 	return pi->num_domains;
 }
 
 static char *scmi_reset_name_get(const struct scmi_handle *handle, u32 domain)
 {
-	struct scmi_reset_info *pi = handle->reset_priv;
+	struct scmi_reset_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_RESET);
 	struct reset_dom_info *dom = pi->dom_info + domain;
 
 	return dom->name;
@@ -136,7 +138,8 @@  static char *scmi_reset_name_get(const struct scmi_handle *handle, u32 domain)
 
 static int scmi_reset_latency_get(const struct scmi_handle *handle, u32 domain)
 {
-	struct scmi_reset_info *pi = handle->reset_priv;
+	struct scmi_reset_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_RESET);
 	struct reset_dom_info *dom = pi->dom_info + domain;
 
 	return dom->latency_us;
@@ -148,7 +151,8 @@  static int scmi_domain_reset(const struct scmi_handle *handle, u32 domain,
 	int ret;
 	struct scmi_xfer *t;
 	struct scmi_msg_reset_domain_reset *dom;
-	struct scmi_reset_info *pi = handle->reset_priv;
+	struct scmi_reset_info *pi =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_RESET);
 	struct reset_dom_info *rdom = pi->dom_info + domain;
 
 	if (rdom->async_reset)
@@ -306,9 +310,7 @@  static int scmi_reset_protocol_init(struct scmi_handle *handle)
 
 	pinfo->version = version;
 	handle->reset_ops = &reset_ops;
-	handle->reset_priv = pinfo;
-
-	return 0;
+	return scmi_set_proto_priv(handle, SCMI_PROTOCOL_RESET, pinfo);
 }
 
 static struct scmi_protocol scmi_reset = {
diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c
index dfe3076d2093..8a0a599558ba 100644
--- a/drivers/firmware/arm_scmi/sensors.c
+++ b/drivers/firmware/arm_scmi/sensors.c
@@ -233,7 +233,8 @@  static int scmi_sensor_reading_get(const struct scmi_handle *handle,
 	int ret;
 	struct scmi_xfer *t;
 	struct scmi_msg_sensor_reading_get *sensor;
-	struct sensors_info *si = handle->sensor_priv;
+	struct sensors_info *si =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_SENSOR);
 	struct scmi_sensor_info *s = si->sensors + sensor_id;
 
 	ret = scmi_xfer_get_init(handle, SENSOR_READING_GET,
@@ -265,14 +266,16 @@  static int scmi_sensor_reading_get(const struct scmi_handle *handle,
 static const struct scmi_sensor_info *
 scmi_sensor_info_get(const struct scmi_handle *handle, u32 sensor_id)
 {
-	struct sensors_info *si = handle->sensor_priv;
+	struct sensors_info *si =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_SENSOR);
 
 	return si->sensors + sensor_id;
 }
 
 static int scmi_sensor_count_get(const struct scmi_handle *handle)
 {
-	struct sensors_info *si = handle->sensor_priv;
+	struct sensors_info *si =
+		scmi_get_proto_priv(handle, SCMI_PROTOCOL_SENSOR);
 
 	return si->num_sensors;
 }
@@ -362,9 +365,7 @@  static int scmi_sensors_protocol_init(struct scmi_handle *handle)
 
 	sinfo->version = version;
 	handle->sensor_ops = &sensor_ops;
-	handle->sensor_priv = sinfo;
-
-	return 0;
+	return scmi_set_proto_priv(handle, SCMI_PROTOCOL_SENSOR, sinfo);
 }
 
 static struct scmi_protocol scmi_sensors = {
diff --git a/drivers/firmware/arm_scmi/system.c b/drivers/firmware/arm_scmi/system.c
index bcea18bf54ab..8f53f93c63ca 100644
--- a/drivers/firmware/arm_scmi/system.c
+++ b/drivers/firmware/arm_scmi/system.c
@@ -123,9 +123,7 @@  static int scmi_system_protocol_init(struct scmi_handle *handle)
 				      SCMI_SYSTEM_NUM_SOURCES);
 
 	pinfo->version = version;
-	handle->system_priv = pinfo;
-
-	return 0;
+	return scmi_set_proto_priv(handle, SCMI_PROTOCOL_SYSTEM, pinfo);
 }
 
 static struct scmi_protocol scmi_system = {
diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h
index ca23d682941e..bc4f06d46bfb 100644
--- a/include/linux/scmi_protocol.h
+++ b/include/linux/scmi_protocol.h
@@ -263,16 +263,6 @@  struct scmi_notify_ops {
  * @sensor_ops: pointer to set of sensor protocol operations
  * @reset_ops: pointer to set of reset protocol operations
  * @notify_ops: pointer to set of notifications related operations
- * @perf_priv: pointer to private data structure specific to performance
- *	protocol(for internal use only)
- * @clk_priv: pointer to private data structure specific to clock
- *	protocol(for internal use only)
- * @power_priv: pointer to private data structure specific to power
- *	protocol(for internal use only)
- * @sensor_priv: pointer to private data structure specific to sensors
- *	protocol(for internal use only)
- * @reset_priv: pointer to private data structure specific to reset
- *	protocol(for internal use only)
  * @notify_priv: pointer to private data structure specific to notifications
  *	(for internal use only)
  */
@@ -285,14 +275,7 @@  struct scmi_handle {
 	const struct scmi_sensor_ops *sensor_ops;
 	const struct scmi_reset_ops *reset_ops;
 	const struct scmi_notify_ops *notify_ops;
-	/* for protocol internal use */
-	void *perf_priv;
-	void *clk_priv;
-	void *power_priv;
-	void *sensor_priv;
-	void *reset_priv;
 	void *notify_priv;
-	void *system_priv;
 };
 
 enum scmi_std_protocol {