From 12a7d2cb811dd8a884dea088a2701fcb8d00136e Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Tue, 7 Mar 2023 23:06:38 -0800 Subject: platform/x86: ISST: Add SST-CP support via TPMI Intel Speed Select Technology Core Power (SST-CP) is an interface that allows users to define per core priority. This defines a mechanism to distribute power among cores when there is a power constrained scenario. This defines a class of service (CLOS) configuration. Three new IOCTLs are added: ISST_IF_CORE_POWER_STATE : Enable/Disable SST-CP ISST_IF_CLOS_PARAM : Configure CLOS parameters ISST_IF_CLOS_ASSOC : Associate CPUs to a CLOS To associate CPUs to CLOS, either Linux CPU numbering or PUNIT numbering scheme can be used, using parameter punit_cpu_map (1: for PUNIT numbering 0 for Linux CPU number). There is no change to IOCTL to get PUNIT CPU number for a CPU. Introduce get_instance() function, which is used by majority of IOCTLs processing to convert a socket and power domain to tpmi_per_power_domain_info * instance. This instance has all the MMIO offsets stored to read a particular field. 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 CP 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 Reviewed-by: Zhang Rui Tested-by: Pragya Tanwar Link: https://lore.kernel.org/r/20230308070642.1727167-5-srinivas.pandruvada@linux.intel.com Signed-off-by: Hans de Goede --- include/uapi/linux/isst_if.h | 79 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/isst_if.h b/include/uapi/linux/isst_if.h index bf32d959f6e8..32687d8023ef 100644 --- a/include/uapi/linux/isst_if.h +++ b/include/uapi/linux/isst_if.h @@ -163,6 +163,82 @@ struct isst_if_msr_cmds { struct isst_if_msr_cmd msr_cmd[1]; }; +/** + * struct isst_core_power - Structure to get/set core_power feature + * @get_set: 0: Get, 1: Set + * @socket_id: Socket/package id + * @power_domain: Power Domain id + * @enable: Feature enable status + * @priority_type: Priority type for the feature (ordered/proportional) + * + * Structure to get/set core_power feature state using IOCTL + * ISST_IF_CORE_POWER_STATE. + */ +struct isst_core_power { + __u8 get_set; + __u8 socket_id; + __u8 power_domain_id; + __u8 enable; + __u8 supported; + __u8 priority_type; +}; + +/** + * struct isst_clos_param - Structure to get/set clos praram + * @get_set: 0: Get, 1: Set + * @socket_id: Socket/package id + * @power_domain: Power Domain id + * clos: Clos ID for the parameters + * min_freq_mhz: Minimum frequency in MHz + * max_freq_mhz: Maximum frequency in MHz + * prop_prio: Proportional priority from 0-15 + * + * Structure to get/set per clos property using IOCTL + * ISST_IF_CLOS_PARAM. + */ +struct isst_clos_param { + __u8 get_set; + __u8 socket_id; + __u8 power_domain_id; + __u8 clos; + __u16 min_freq_mhz; + __u16 max_freq_mhz; + __u8 prop_prio; +}; + +/** + * struct isst_if_clos_assoc - Structure to assign clos to a CPU + * @socket_id: Socket/package id + * @power_domain: Power Domain id + * @logical_cpu: CPU number + * @clos: Clos ID to assign to the logical CPU + * + * Structure to get/set core_power feature. + */ +struct isst_if_clos_assoc { + __u8 socket_id; + __u8 power_domain_id; + __u16 logical_cpu; + __u16 clos; +}; + +/** + * struct isst_if_clos_assoc_cmds - Structure to assign clos to CPUs + * @cmd_count: Number of cmds (cpus) in this request + * @get_set: Request is for get or set + * @punit_cpu_map: Set to 1 if the CPU number is punit numbering not + * Linux CPU number + * + * Structure used to get/set associate CPUs to clos using IOCTL + * ISST_IF_CLOS_ASSOC. + */ +struct isst_if_clos_assoc_cmds { + __u16 cmd_count; + __u16 get_set; + __u16 punit_cpu_map; + struct isst_if_clos_assoc assoc_info[1]; +}; + /** * struct isst_tpmi_instance_count - Get number of TPMI instances per socket * @socket_id: Socket/package id @@ -186,5 +262,8 @@ struct isst_tpmi_instance_count { #define ISST_IF_MSR_COMMAND _IOWR(ISST_IF_MAGIC, 4, struct isst_if_msr_cmds *) #define ISST_IF_COUNT_TPMI_INSTANCES _IOR(ISST_IF_MAGIC, 5, struct isst_tpmi_instance_count *) +#define ISST_IF_CORE_POWER_STATE _IOWR(ISST_IF_MAGIC, 6, struct isst_core_power *) +#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 *) #endif -- cgit v1.2.3