1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef __ASM_POWERPC_IMC_PMU_H 3 #define __ASM_POWERPC_IMC_PMU_H 4 5 /* 6 * IMC Nest Performance Monitor counter support. 7 * 8 * Copyright (C) 2017 Madhavan Srinivasan, IBM Corporation. 9 * (C) 2017 Anju T Sudhakar, IBM Corporation. 10 * (C) 2017 Hemant K Shaw, IBM Corporation. 11 */ 12 13 #include <linux/perf_event.h> 14 #include <linux/slab.h> 15 #include <linux/of.h> 16 #include <linux/io.h> 17 #include <asm/opal.h> 18 19 /* 20 * Compatibility macros for IMC devices 21 */ 22 #define IMC_DTB_COMPAT "ibm,opal-in-memory-counters" 23 #define IMC_DTB_UNIT_COMPAT "ibm,imc-counters" 24 25 26 /* 27 * LDBAR: Counter address and Enable/Disable macro. 28 * perf/imc-pmu.c has the LDBAR layout information. 29 */ 30 #define THREAD_IMC_LDBAR_MASK 0x0003ffffffffe000ULL 31 #define THREAD_IMC_ENABLE 0x8000000000000000ULL 32 #define TRACE_IMC_ENABLE 0x4000000000000000ULL 33 34 /* 35 * For debugfs interface for imc-mode and imc-command 36 */ 37 #define IMC_CNTL_BLK_OFFSET 0x3FC00 38 #define IMC_CNTL_BLK_CMD_OFFSET 8 39 #define IMC_CNTL_BLK_MODE_OFFSET 32 40 41 /* 42 * Structure to hold memory address information for imc units. 43 */ 44 struct imc_mem_info { 45 u64 *vbase; 46 u32 id; 47 }; 48 49 /* 50 * Place holder for nest pmu events and values. 51 */ 52 struct imc_events { 53 u32 value; 54 char *name; 55 char *unit; 56 char *scale; 57 }; 58 59 /* 60 * Trace IMC hardware updates a 64bytes record on 61 * Core Performance Monitoring Counter (CPMC) 62 * overflow. Here is the layout for the trace imc record 63 * 64 * DW 0 : Timebase 65 * DW 1 : Program Counter 66 * DW 2 : PIDR information 67 * DW 3 : CPMC1 68 * DW 4 : CPMC2 69 * DW 5 : CPMC3 70 * Dw 6 : CPMC4 71 * DW 7 : Timebase 72 * ..... 73 * 74 * The following is the data structure to hold trace imc data. 75 */ 76 struct trace_imc_data { 77 u64 tb1; 78 u64 ip; 79 u64 val; 80 u64 cpmc1; 81 u64 cpmc2; 82 u64 cpmc3; 83 u64 cpmc4; 84 u64 tb2; 85 }; 86 87 /* Event attribute array index */ 88 #define IMC_FORMAT_ATTR 0 89 #define IMC_EVENT_ATTR 1 90 #define IMC_CPUMASK_ATTR 2 91 #define IMC_NULL_ATTR 3 92 93 /* PMU Format attribute macros */ 94 #define IMC_EVENT_OFFSET_MASK 0xffffffffULL 95 96 /* 97 * Macro to mask bits 0:21 of first double word(which is the timebase) to 98 * compare with 8th double word (timebase) of trace imc record data. 99 */ 100 #define IMC_TRACE_RECORD_TB1_MASK 0x3ffffffffffULL 101 102 /* 103 * Bit 0:1 in third DW of IMC trace record 104 * specifies the MSR[HV PR] values. 105 */ 106 #define IMC_TRACE_RECORD_VAL_HVPR(x) ((x) >> 62) 107 108 /* 109 * Device tree parser code detects IMC pmu support and 110 * registers new IMC pmus. This structure will hold the 111 * pmu functions, events, counter memory information 112 * and attrs for each imc pmu and will be referenced at 113 * the time of pmu registration. 114 */ 115 struct imc_pmu { 116 struct pmu pmu; 117 struct imc_mem_info *mem_info; 118 struct imc_events *events; 119 /* 120 * Attribute groups for the PMU. Slot 0 used for 121 * format attribute, slot 1 used for cpusmask attribute, 122 * slot 2 used for event attribute. Slot 3 keep as 123 * NULL. 124 */ 125 const struct attribute_group *attr_groups[4]; 126 u32 counter_mem_size; 127 int domain; 128 /* 129 * flag to notify whether the memory is mmaped 130 * or allocated by kernel. 131 */ 132 bool imc_counter_mmaped; 133 }; 134 135 /* 136 * Structure to hold id, lock and reference count for the imc events which 137 * are inited. 138 */ 139 struct imc_pmu_ref { 140 struct mutex lock; 141 unsigned int id; 142 int refc; 143 }; 144 145 /* 146 * In-Memory Collection Counters type. 147 * Data comes from Device tree. 148 * Three device type are supported. 149 */ 150 151 enum { 152 IMC_TYPE_THREAD = 0x1, 153 IMC_TYPE_TRACE = 0x2, 154 IMC_TYPE_CORE = 0x4, 155 IMC_TYPE_CHIP = 0x10, 156 }; 157 158 /* 159 * Domains for IMC PMUs 160 */ 161 #define IMC_DOMAIN_NEST 1 162 #define IMC_DOMAIN_CORE 2 163 #define IMC_DOMAIN_THREAD 3 164 /* For trace-imc the domain is still thread but it operates in trace-mode */ 165 #define IMC_DOMAIN_TRACE 4 166 167 extern int init_imc_pmu(struct device_node *parent, 168 struct imc_pmu *pmu_ptr, int pmu_id); 169 extern void thread_imc_disable(void); 170 extern int get_max_nest_dev(void); 171 extern void unregister_thread_imc(void); 172 #endif /* __ASM_POWERPC_IMC_PMU_H */ 173