platform/x86: ISST: Add SST-PP support via TPMI

This Intel Speed Select Technology - Performance Profile (SST-PP) feature
introduces a mechanism that allows multiple optimized performance profiles
per system. Each profile defines a set of CPUs that need to be online and
rest offline to sustain a guaranteed base frequency.

Five new IOCTLs are added:
ISST_IF_PERF_LEVELS : Get number of performance levels
ISST_IF_PERF_SET_LEVEL : Set to a new performance level
ISST_IF_PERF_SET_FEATURE : Activate SST-BF/SST-TF for a performance level
ISST_IF_GET_PERF_LEVEL_INFO : Get parameters for a performance level
ISST_IF_GET_PERF_LEVEL_CPU_MASK : Get CPU mask for a performance level

Once an instance is identified, read or write from correct MMIO
offset for a given field as defined in the specification.

For details on SST PP operations using intel-speed-selet utility,
refer to:
Documentation/admin-guide/pm/intel-speed-select.rst
under the kernel documentation

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Pragya Tanwar <pragya.tanwar@intel.com>
Link: https://lore.kernel.org/r/20230308070642.1727167-6-srinivas.pandruvada@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

1 files changed, 180 insertions, 0 deletions

diff --git a/include/uapi/linux/isst_if.h b/include/uapi/linux/isst_if.h
index 32687d8023ef..c4b350ea5cbe 100644
--- a/include/uapi/linux/isst_if.h
+++ b/include/uapi/linux/isst_if.h
@@ -254,6 +254,178 @@ struct isst_tpmi_instance_count {
 	__u16 valid_mask;
 };
 
+/**
+ * struct isst_perf_level_info - Structure to get information on SST-PP levels
+ * @socket_id:	Socket/package id
+ * @power_domain:	Power Domain id
+ * @logical_cpu: CPU number
+ * @clos:	Clos ID to assign to the logical CPU
+ * @max_level: Maximum performance level supported by the platform
+ * @feature_rev: The feature revision for SST-PP supported by the platform
+ * @level_mask: Mask of supported performance levels
+ * @current_level: Current performance level
+ * @feature_state: SST-BF and SST-TF (enabled/disabled) status at current level
+ * @locked: SST-PP performance level change is locked/unlocked
+ * @enabled: SST-PP feature is enabled or not
+ * @sst-tf_support: SST-TF support status at this level
+ * @sst-bf_support: SST-BF support status at this level
+ *
+ * Structure to get SST-PP details using IOCTL ISST_IF_PERF_LEVELS.
+ */
+struct isst_perf_level_info {
+	__u8 socket_id;
+	__u8 power_domain_id;
+	__u8 max_level;
+	__u8 feature_rev;
+	__u8 level_mask;
+	__u8 current_level;
+	__u8 feature_state;
+	__u8 locked;
+	__u8 enabled;
+	__u8 sst_tf_support;
+	__u8 sst_bf_support;
+};
+
+/**
+ * struct isst_perf_level_control - Structure to set SST-PP level
+ * @socket_id:	Socket/package id
+ * @power_domain:	Power Domain id
+ * @level:	level to set
+ *
+ * Structure used change SST-PP level using IOCTL ISST_IF_PERF_SET_LEVEL.
+ */
+struct isst_perf_level_control {
+	__u8 socket_id;
+	__u8 power_domain_id;
+	__u8 level;
+};
+
+/**
+ * struct isst_perf_feature_control - Structure to activate SST-BF/SST-TF
+ * @socket_id:	Socket/package id
+ * @power_domain:	Power Domain id
+ * @feature:	bit 0 = SST-BF state, bit 1 = SST-TF state
+ *
+ * Structure used to enable SST-BF/SST-TF using IOCTL ISST_IF_PERF_SET_FEATURE.
+ */
+struct isst_perf_feature_control {
+	__u8 socket_id;
+	__u8 power_domain_id;
+	__u8 feature;
+};
+
+#define TRL_MAX_BUCKETS	8
+#define TRL_MAX_LEVELS		6
+
+/**
+ * struct isst_perf_level_data_info - Structure to get SST-PP level details
+ * @socket_id:	Socket/package id
+ * @power_domain:	Power Domain id
+ * @level:	SST-PP level for which caller wants to get information
+ * @tdp_ratio: TDP Ratio
+ * @base_freq_mhz: Base frequency in MHz
+ * @base_freq_avx2_mhz: AVX2 Base frequency in MHz
+ * @base_freq_avx512_mhz: AVX512 base frequency in MHz
+ * @base_freq_amx_mhz: AMX base frequency in MHz
+ * @thermal_design_power_w: Thermal design (TDP) power
+ * @tjunction_max_c: Max junction temperature
+ * @max_memory_freq_mhz: Max memory frequency in MHz
+ * @cooling_type: Type of cooling is used
+ * @p0_freq_mhz: core maximum frequency
+ * @p1_freq_mhz: Core TDP frequency
+ * @pn_freq_mhz: Core maximum efficiency frequency
+ * @pm_freq_mhz: Core minimum frequency
+ * @p0_fabric_freq_mhz: Fabric (Uncore) maximum frequency
+ * @p1_fabric_freq_mhz: Fabric (Uncore) TDP frequency
+ * @pn_fabric_freq_mhz: Fabric (Uncore) minimum efficiency frequency
+ * @pm_fabric_freq_mhz: Fabric (Uncore) minimum frequency
+ * @max_buckets: Maximum trl buckets
+ * @max_trl_levels: Maximum trl levels
+ * @bucket_core_counts[TRL_MAX_BUCKETS]: Number of cores per bucket
+ * @trl_freq_mhz[TRL_MAX_LEVELS][TRL_MAX_BUCKETS]: maximum frequency
+ * for a bucket and trl level
+ *
+ * Structure used to get information on frequencies and TDP for a SST-PP
+ * level using ISST_IF_GET_PERF_LEVEL_INFO.
+ */
+struct isst_perf_level_data_info {
+	__u8 socket_id;
+	__u8 power_domain_id;
+	__u16 level;
+	__u16 tdp_ratio;
+	__u16 base_freq_mhz;
+	__u16 base_freq_avx2_mhz;
+	__u16 base_freq_avx512_mhz;
+	__u16 base_freq_amx_mhz;
+	__u16 thermal_design_power_w;
+	__u16 tjunction_max_c;
+	__u16 max_memory_freq_mhz;
+	__u16 cooling_type;
+	__u16 p0_freq_mhz;
+	__u16 p1_freq_mhz;
+	__u16 pn_freq_mhz;
+	__u16 pm_freq_mhz;
+	__u16 p0_fabric_freq_mhz;
+	__u16 p1_fabric_freq_mhz;
+	__u16 pn_fabric_freq_mhz;
+	__u16 pm_fabric_freq_mhz;
+	__u16 max_buckets;
+	__u16 max_trl_levels;
+	__u16 bucket_core_counts[TRL_MAX_BUCKETS];
+	__u16 trl_freq_mhz[TRL_MAX_LEVELS][TRL_MAX_BUCKETS];
+};
+
+/**
+ * struct isst_perf_level_cpu_mask - Structure to get SST-PP level CPU mask
+ * @socket_id:	Socket/package id
+ * @power_domain:	Power Domain id
+ * @level:	SST-PP level for which caller wants to get information
+ * @punit_cpu_map: Set to 1 if the CPU number is punit numbering not
+ *		   Linux CPU number. If 0 CPU buffer is copied to user space
+ *		   supplied cpu_buffer of size cpu_buffer_size. Punit
+ *		   cpu mask is copied to "mask" field.
+ * @mask:	cpu mask for this PP level (punit CPU numbering)
+ * @cpu_buffer_size: size of cpu_buffer also used to return the copied CPU
+ *		buffer size.
+ * @cpu_buffer:	Buffer to copy CPU mask when punit_cpu_map is 0
+ *
+ * Structure used to get cpumask for a SST-PP level using
+ * IOCTL ISST_IF_GET_PERF_LEVEL_CPU_MASK. Also used to get CPU mask for
+ * IOCTL ISST_IF_GET_BASE_FREQ_CPU_MASK for SST-BF.
+ */
+struct isst_perf_level_cpu_mask {
+	__u8 socket_id;
+	__u8 power_domain_id;
+	__u8 level;
+	__u8 punit_cpu_map;
+	__u64 mask;
+	__u16 cpu_buffer_size;
+	__s8 cpu_buffer[1];
+};
+
+/**
+ * struct isst_base_freq_info - Structure to get SST-BF frequencies
+ * @socket_id:	Socket/package id
+ * @power_domain:	Power Domain id
+ * @level:	SST-PP level for which caller wants to get information
+ * @high_base_freq_mhz: High priority CPU base frequency
+ * @low_base_freq_mhz: Low priority CPU base frequency
+ * @tjunction_max_c: Max junction temperature
+ * @thermal_design_power_w: Thermal design power in watts
+ *
+ * Structure used to get SST-BF information using
+ * IOCTL ISST_IF_GET_BASE_FREQ_INFO.
+ */
+struct isst_base_freq_info {
+	__u8 socket_id;
+	__u8 power_domain_id;
+	__u16 level;
+	__u16 high_base_freq_mhz;
+	__u16 low_base_freq_mhz;
+	__u16 tjunction_max_c;
+	__u16 thermal_design_power_w;
+};
+
 #define ISST_IF_MAGIC			0xFE
 #define ISST_IF_GET_PLATFORM_INFO	_IOR(ISST_IF_MAGIC, 0, struct isst_if_platform_info *)
 #define ISST_IF_GET_PHY_ID		_IOWR(ISST_IF_MAGIC, 1, struct isst_if_cpu_map *)
@@ -266,4 +438,12 @@ struct isst_tpmi_instance_count {
 #define ISST_IF_CLOS_PARAM	_IOWR(ISST_IF_MAGIC, 7, struct isst_clos_param *)
 #define ISST_IF_CLOS_ASSOC	_IOWR(ISST_IF_MAGIC, 8, struct isst_if_clos_assoc_cmds *)
 
+#define ISST_IF_PERF_LEVELS	_IOWR(ISST_IF_MAGIC, 9, struct isst_perf_level_info *)
+#define ISST_IF_PERF_SET_LEVEL	_IOW(ISST_IF_MAGIC, 10, struct isst_perf_level_control *)
+#define ISST_IF_PERF_SET_FEATURE _IOW(ISST_IF_MAGIC, 11, struct isst_perf_feature_control *)
+#define ISST_IF_GET_PERF_LEVEL_INFO	_IOR(ISST_IF_MAGIC, 12, struct isst_perf_level_data_info *)
+#define ISST_IF_GET_PERF_LEVEL_CPU_MASK	_IOR(ISST_IF_MAGIC, 13, struct isst_perf_level_cpu_mask *)
+#define ISST_IF_GET_BASE_FREQ_INFO	_IOR(ISST_IF_MAGIC, 14, struct isst_base_freq_info *)
+#define ISST_IF_GET_BASE_FREQ_CPU_MASK	_IOR(ISST_IF_MAGIC, 15, struct isst_perf_level_cpu_mask *)
+
 #endif