Merge tag 'scmi-updates-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into soc/drivers

Arm SCMI updates for v6.7

Main additions this time include:

1. SCMI v3.2 clock configuration support:
   This helps to retrieve the enabled state of a clock as well as allow
   to set OEM specific clock configurations.

2. Support for generic performance scaling(DVFS):
   The current SCMI DVFS support is limited to the CPUs in the kernel.
   This extension enables it to used for all kind of devices and not
   only for the CPUs. It updates the SCMI cpufreq to utilize the power
   domain bindings. It also adds a more generic SCMI performance domain
   based on the genpd framework that as be used for all the non-CPU
   devices.

3. Extend the generic performance scaling(DVFS) support for firmware
   driver OPPs:
   Consumer drivers for devices that are attached to the SCMI performance
   domain can't make use of the current OPP library to scale performance
   as the OPPs are firmware driven and often obtained from the firmware
   rather than the device tree. These changes extend the generic OPP
   and genpd PM domain frameworks to identify and utilise these firmware
   driven OPPs.

4. SCMI v3.2 clock parent support:
   This enables the support for discovering and changing parent clocks
   and extending the SCMI clk driver to use the same.

5. Qualcom SMC/HVC transport support:
   The Qualcomm virtual platforms require capability id in the hypervisor
   call to identify which doorbell to assert when supporting multiple
   SMC/HVC based SCMI transport channels. Extra parameter is added to
   support the same and the same is obtained at the fixed address in the
   shared memory which is initialised by the firmware.

6. Move the existing SCMI power domain driver under drivers/pmdomain

Apart from the above main changes, it also include couple of minor fixes
and cosmetic reworks.

* tag 'scmi-updates-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux: (37 commits)
  firmware: arm_scmi: Add qcom smc/hvc transport support
  dt-bindings: arm: Add new compatible for smc/hvc transport for SCMI
  firmware: arm_scmi: Convert u32 to unsigned long to align with arm_smccc_1_1_invoke()
  clk: scmi: Add support for clock {set,get}_parent
  firmware: arm_scmi: Add support for clock parents
  clk: scmi: Free scmi_clk allocated when the clocks with invalid info are skipped
  firmware: arm_scpi: Use device_get_match_data()
  firmware: arm_scmi: Add generic OPP support to the SCMI performance domain
  firmware: arm_scmi: Specify the performance level when adding an OPP
  firmware: arm_scmi: Simplify error path in scmi_dvfs_device_opps_add()
  OPP: Extend support for the opp-level beyond required-opps
  OPP: Switch to use dev_pm_domain_set_performance_state()
  OPP: Extend dev_pm_opp_data with a level
  OPP: Add dev_pm_opp_add_dynamic() to allow more flexibility
  PM: domains: Implement the ->set_performance_state() callback for genpd
  PM: domains: Introduce dev_pm_domain_set_performance_state()
  firmware: arm_scmi: Rename scmi_{msg_,}clock_config_{get,set}_{2,21}
  firmware: arm_scmi: Do not use !! on boolean when setting msg->flags
  firmware: arm_scmi: Move power-domain driver to the pmdomain dir
  pmdomain: arm: Add the SCMI performance domain
  ...

Link: https://lore.kernel.org/r/20231010124347.1620040-1-sudeep.holla@arm.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

4 files changed, 73 insertions, 14 deletions

diff --git a/include/linux/pm.h b/include/linux/pm.h
index 1400c37b29c7..4c9f571609c8 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -719,6 +719,7 @@ extern void dev_pm_put_subsys_data(struct device *dev);
  * @activate: Called before executing probe routines for bus types and drivers.
  * @sync: Called after successful driver probe.
  * @dismiss: Called after unsuccessful driver probe and after driver removal.
+ * @set_performance_state: Called to request a new performance state.
  *
  * Power domains provide callbacks that are executed during system suspend,
  * hibernation, system resume and during runtime PM transitions instead of
@@ -731,6 +732,7 @@ struct dev_pm_domain {
 	int (*activate)(struct device *dev);
 	void (*sync)(struct device *dev);
 	void (*dismiss)(struct device *dev);
+	int (*set_performance_state)(struct device *dev, unsigned int state);
 };
 
 /*
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index f776fb93eaa0..34663d0d5c55 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -61,6 +61,10 @@
  * GENPD_FLAG_MIN_RESIDENCY:	Enable the genpd governor to consider its
  *				components' next wakeup when determining the
  *				optimal idle state.
+ *
+ * GENPD_FLAG_OPP_TABLE_FW:	The genpd provider supports performance states,
+ *				but its corresponding OPP tables are not
+ *				described in DT, but are given directly by FW.
  */
 #define GENPD_FLAG_PM_CLK	 (1U << 0)
 #define GENPD_FLAG_IRQ_SAFE	 (1U << 1)
@@ -69,6 +73,7 @@
 #define GENPD_FLAG_CPU_DOMAIN	 (1U << 4)
 #define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5)
 #define GENPD_FLAG_MIN_RESIDENCY (1U << 6)
+#define GENPD_FLAG_OPP_TABLE_FW	 (1U << 7)
 
 enum gpd_status {
 	GENPD_STATE_ON = 0,	/* PM domain is on */
@@ -430,6 +435,7 @@ struct device *dev_pm_domain_attach_by_name(struct device *dev,
 void dev_pm_domain_detach(struct device *dev, bool power_off);
 int dev_pm_domain_start(struct device *dev);
 void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd);
+int dev_pm_domain_set_performance_state(struct device *dev, unsigned int state);
 #else
 static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
 {
@@ -452,6 +458,11 @@ static inline int dev_pm_domain_start(struct device *dev)
 }
 static inline void dev_pm_domain_set(struct device *dev,
 				     struct dev_pm_domain *pd) {}
+static inline int dev_pm_domain_set_performance_state(struct device *dev,
+						      unsigned int state)
+{
+	return 0;
+}
 #endif
 
 #endif /* _LINUX_PM_DOMAIN_H */
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 91f87d7e807c..9ad168f4cbf1 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -92,6 +92,18 @@ struct dev_pm_opp_config {
 	struct device ***virt_devs;
 };
 
+/**
+ * struct dev_pm_opp_data - The data to use to initialize an OPP.
+ * @level: The performance level for the OPP.
+ * @freq: The clock rate in Hz for the OPP.
+ * @u_volt: The voltage in uV for the OPP.
+ */
+struct dev_pm_opp_data {
+	unsigned int level;
+	unsigned long freq;
+	unsigned long u_volt;
+};
+
 #if defined(CONFIG_PM_OPP)
 
 struct opp_table *dev_pm_opp_get_opp_table(struct device *dev);
@@ -152,8 +164,8 @@ struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev,
 
 void dev_pm_opp_put(struct dev_pm_opp *opp);
 
-int dev_pm_opp_add(struct device *dev, unsigned long freq,
-		   unsigned long u_volt);
+int dev_pm_opp_add_dynamic(struct device *dev, struct dev_pm_opp_data *opp);
+
 void dev_pm_opp_remove(struct device *dev, unsigned long freq);
 void dev_pm_opp_remove_all_dynamic(struct device *dev);
 
@@ -322,8 +334,8 @@ static inline struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev,
 
 static inline void dev_pm_opp_put(struct dev_pm_opp *opp) {}
 
-static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
-					unsigned long u_volt)
+static inline int
+dev_pm_opp_add_dynamic(struct device *dev, struct dev_pm_opp_data *opp)
 {
 	return -EOPNOTSUPP;
 }
@@ -519,6 +531,17 @@ static inline int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_ta
 
 /* OPP Configuration helpers */
 
+static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
+				 unsigned long u_volt)
+{
+	struct dev_pm_opp_data data = {
+		.freq = freq,
+		.u_volt = u_volt,
+	};
+
+	return dev_pm_opp_add_dynamic(dev, &data);
+}
+
 /* Regulators helpers */
 static inline int dev_pm_opp_set_regulators(struct device *dev,
 					    const char * const names[])
diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h
index e6fe4f73ffe6..f2f05fb42d28 100644
--- a/include/linux/scmi_protocol.h
+++ b/include/linux/scmi_protocol.h
@@ -58,6 +58,8 @@ struct scmi_clock_info {
 			u64 step_size;
 		} range;
 	};
+	int num_parents;
+	u32 *parents;
 };
 
 enum scmi_power_scale {
@@ -80,6 +82,11 @@ struct scmi_protocol_handle;
  * @rate_set: set the clock rate of a clock
  * @enable: enables the specified clock
  * @disable: disables the specified clock
+ * @state_get: get the status of the specified clock
+ * @config_oem_get: get the value of an OEM specific clock config
+ * @config_oem_set: set the value of an OEM specific clock config
+ * @parent_get: get the parent id of a clk
+ * @parent_set: set the parent of a clock
  */
 struct scmi_clk_proto_ops {
 	int (*count_get)(const struct scmi_protocol_handle *ph);
@@ -90,22 +97,36 @@ struct scmi_clk_proto_ops {
 			u64 *rate);
 	int (*rate_set)(const struct scmi_protocol_handle *ph, u32 clk_id,
 			u64 rate);
-	int (*enable)(const struct scmi_protocol_handle *ph, u32 clk_id);
-	int (*disable)(const struct scmi_protocol_handle *ph, u32 clk_id);
-	int (*enable_atomic)(const struct scmi_protocol_handle *ph, u32 clk_id);
-	int (*disable_atomic)(const struct scmi_protocol_handle *ph,
-			      u32 clk_id);
+	int (*enable)(const struct scmi_protocol_handle *ph, u32 clk_id,
+		      bool atomic);
+	int (*disable)(const struct scmi_protocol_handle *ph, u32 clk_id,
+		       bool atomic);
+	int (*state_get)(const struct scmi_protocol_handle *ph, u32 clk_id,
+			 bool *enabled, bool atomic);
+	int (*config_oem_get)(const struct scmi_protocol_handle *ph, u32 clk_id,
+			      u8 oem_type, u32 *oem_val, u32 *attributes,
+			      bool atomic);
+	int (*config_oem_set)(const struct scmi_protocol_handle *ph, u32 clk_id,
+			      u8 oem_type, u32 oem_val, bool atomic);
+	int (*parent_get)(const struct scmi_protocol_handle *ph, u32 clk_id, u32 *parent_id);
+	int (*parent_set)(const struct scmi_protocol_handle *ph, u32 clk_id, u32 parent_id);
+};
+
+struct scmi_perf_domain_info {
+	char name[SCMI_MAX_STR_SIZE];
+	bool set_perf;
 };
 
 /**
  * struct scmi_perf_proto_ops - represents the various operations provided
  *	by SCMI Performance Protocol
  *
+ * @num_domains_get: gets the number of supported performance domains
+ * @info_get: get the information of a performance domain
  * @limits_set: sets limits on the performance level of a domain
  * @limits_get: gets limits on the performance level of a domain
  * @level_set: sets the performance level of a domain
  * @level_get: gets the performance level of a domain
- * @device_domain_id: gets the scmi domain id for a given device
  * @transition_latency_get: gets the DVFS transition latency for a given device
  * @device_opps_add: adds all the OPPs for a given device
  * @freq_set: sets the frequency for a given device using sustained frequency
@@ -120,6 +141,9 @@ struct scmi_clk_proto_ops {
  *	or in some other (abstract) scale
  */
 struct scmi_perf_proto_ops {
+	int (*num_domains_get)(const struct scmi_protocol_handle *ph);
+	const struct scmi_perf_domain_info __must_check *(*info_get)
+		(const struct scmi_protocol_handle *ph, u32 domain);
 	int (*limits_set)(const struct scmi_protocol_handle *ph, u32 domain,
 			  u32 max_perf, u32 min_perf);
 	int (*limits_get)(const struct scmi_protocol_handle *ph, u32 domain,
@@ -128,11 +152,10 @@ struct scmi_perf_proto_ops {
 			 u32 level, bool poll);
 	int (*level_get)(const struct scmi_protocol_handle *ph, u32 domain,
 			 u32 *level, bool poll);
-	int (*device_domain_id)(struct device *dev);
 	int (*transition_latency_get)(const struct scmi_protocol_handle *ph,
-				      struct device *dev);
+				      u32 domain);
 	int (*device_opps_add)(const struct scmi_protocol_handle *ph,
-			       struct device *dev);
+			       struct device *dev, u32 domain);
 	int (*freq_set)(const struct scmi_protocol_handle *ph, u32 domain,
 			unsigned long rate, bool poll);
 	int (*freq_get)(const struct scmi_protocol_handle *ph, u32 domain,
@@ -140,7 +163,7 @@ struct scmi_perf_proto_ops {
 	int (*est_power_get)(const struct scmi_protocol_handle *ph, u32 domain,
 			     unsigned long *rate, unsigned long *power);
 	bool (*fast_switch_possible)(const struct scmi_protocol_handle *ph,
-				     struct device *dev);
+				     u32 domain);
 	enum scmi_power_scale (*power_scale_get)(const struct scmi_protocol_handle *ph);
 };