diff options
Diffstat (limited to 'arch/nds32/include/asm/pmu.h')
| -rw-r--r-- | arch/nds32/include/asm/pmu.h | 386 |
1 files changed, 386 insertions, 0 deletions
diff --git a/arch/nds32/include/asm/pmu.h b/arch/nds32/include/asm/pmu.h new file mode 100644 index 000000000..e1ac0b0b8 --- /dev/null +++ b/arch/nds32/include/asm/pmu.h @@ -0,0 +1,386 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2008-2018 Andes Technology Corporation */ + +#ifndef __ASM_PMU_H +#define __ASM_PMU_H + +#include <linux/interrupt.h> +#include <linux/perf_event.h> +#include <asm/unistd.h> +#include <asm/bitfield.h> + +/* Has special meaning for perf core implementation */ +#define HW_OP_UNSUPPORTED 0x0 +#define C(_x) PERF_COUNT_HW_CACHE_##_x +#define CACHE_OP_UNSUPPORTED 0x0 + +/* Enough for both software and hardware defined events */ +#define SOFTWARE_EVENT_MASK 0xFF + +#define PFM_OFFSET_MAGIC_0 2 /* DO NOT START FROM 0 */ +#define PFM_OFFSET_MAGIC_1 (PFM_OFFSET_MAGIC_0 + 36) +#define PFM_OFFSET_MAGIC_2 (PFM_OFFSET_MAGIC_1 + 36) + +enum { PFMC0, PFMC1, PFMC2, MAX_COUNTERS }; + +u32 PFM_CTL_OVF[3] = { PFM_CTL_mskOVF0, PFM_CTL_mskOVF1, + PFM_CTL_mskOVF2 }; +u32 PFM_CTL_EN[3] = { PFM_CTL_mskEN0, PFM_CTL_mskEN1, + PFM_CTL_mskEN2 }; +u32 PFM_CTL_OFFSEL[3] = { PFM_CTL_offSEL0, PFM_CTL_offSEL1, + PFM_CTL_offSEL2 }; +u32 PFM_CTL_IE[3] = { PFM_CTL_mskIE0, PFM_CTL_mskIE1, PFM_CTL_mskIE2 }; +u32 PFM_CTL_KS[3] = { PFM_CTL_mskKS0, PFM_CTL_mskKS1, PFM_CTL_mskKS2 }; +u32 PFM_CTL_KU[3] = { PFM_CTL_mskKU0, PFM_CTL_mskKU1, PFM_CTL_mskKU2 }; +u32 PFM_CTL_SEL[3] = { PFM_CTL_mskSEL0, PFM_CTL_mskSEL1, PFM_CTL_mskSEL2 }; +/* + * Perf Events' indices + */ +#define NDS32_IDX_CYCLE_COUNTER 0 +#define NDS32_IDX_COUNTER0 1 +#define NDS32_IDX_COUNTER1 2 + +/* The events for a given PMU register set. */ +struct pmu_hw_events { + /* + * The events that are active on the PMU for the given index. + */ + struct perf_event *events[MAX_COUNTERS]; + + /* + * A 1 bit for an index indicates that the counter is being used for + * an event. A 0 means that the counter can be used. + */ + unsigned long used_mask[BITS_TO_LONGS(MAX_COUNTERS)]; + + /* + * Hardware lock to serialize accesses to PMU registers. Needed for the + * read/modify/write sequences. + */ + raw_spinlock_t pmu_lock; +}; + +struct nds32_pmu { + struct pmu pmu; + cpumask_t active_irqs; + char *name; + irqreturn_t (*handle_irq)(int irq_num, void *dev); + void (*enable)(struct perf_event *event); + void (*disable)(struct perf_event *event); + int (*get_event_idx)(struct pmu_hw_events *hw_events, + struct perf_event *event); + int (*set_event_filter)(struct hw_perf_event *evt, + struct perf_event_attr *attr); + u32 (*read_counter)(struct perf_event *event); + void (*write_counter)(struct perf_event *event, u32 val); + void (*start)(struct nds32_pmu *nds32_pmu); + void (*stop)(struct nds32_pmu *nds32_pmu); + void (*reset)(void *data); + int (*request_irq)(struct nds32_pmu *nds32_pmu, irq_handler_t handler); + void (*free_irq)(struct nds32_pmu *nds32_pmu); + int (*map_event)(struct perf_event *event); + int num_events; + atomic_t active_events; + u64 max_period; + struct platform_device *plat_device; + struct pmu_hw_events *(*get_hw_events)(void); +}; + +#define to_nds32_pmu(p) (container_of(p, struct nds32_pmu, pmu)) + +int nds32_pmu_register(struct nds32_pmu *nds32_pmu, int type); + +u64 nds32_pmu_event_update(struct perf_event *event); + +int nds32_pmu_event_set_period(struct perf_event *event); + +/* + * Common NDS32 SPAv3 event types + * + * Note: An implementation may not be able to count all of these events + * but the encodings are considered to be `reserved' in the case that + * they are not available. + * + * SEL_TOTAL_CYCLES will add an offset is due to ZERO is defined as + * NOT_SUPPORTED EVENT mapping in generic perf code. + * You will need to deal it in the event writing implementation. + */ +enum spav3_counter_0_perf_types { + SPAV3_0_SEL_BASE = -1 + PFM_OFFSET_MAGIC_0, /* counting symbol */ + SPAV3_0_SEL_TOTAL_CYCLES = 0 + PFM_OFFSET_MAGIC_0, + SPAV3_0_SEL_COMPLETED_INSTRUCTION = 1 + PFM_OFFSET_MAGIC_0, + SPAV3_0_SEL_LAST /* counting symbol */ +}; + +enum spav3_counter_1_perf_types { + SPAV3_1_SEL_BASE = -1 + PFM_OFFSET_MAGIC_1, /* counting symbol */ + SPAV3_1_SEL_TOTAL_CYCLES = 0 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_COMPLETED_INSTRUCTION = 1 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_CONDITIONAL_BRANCH = 2 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_TAKEN_CONDITIONAL_BRANCH = 3 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_PREFETCH_INSTRUCTION = 4 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_RET_INST = 5 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_JR_INST = 6 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_JAL_JRAL_INST = 7 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_NOP_INST = 8 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_SCW_INST = 9 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_ISB_DSB_INST = 10 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_CCTL_INST = 11 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_TAKEN_INTERRUPTS = 12 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_LOADS_COMPLETED = 13 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_UITLB_ACCESS = 14 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_UDTLB_ACCESS = 15 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_MTLB_ACCESS = 16 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_CODE_CACHE_ACCESS = 17 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_DATA_DEPENDENCY_STALL_CYCLES = 18 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_DATA_CACHE_MISS_STALL_CYCLES = 19 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_DATA_CACHE_ACCESS = 20 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_DATA_CACHE_MISS = 21 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_LOAD_DATA_CACHE_ACCESS = 22 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_STORE_DATA_CACHE_ACCESS = 23 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_ILM_ACCESS = 24 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_LSU_BIU_CYCLES = 25 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_HPTWK_BIU_CYCLES = 26 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_DMA_BIU_CYCLES = 27 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_CODE_CACHE_FILL_BIU_CYCLES = 28 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_LEGAL_UNALIGN_DCACHE_ACCESS = 29 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_PUSH25 = 30 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_SYSCALLS_INST = 31 + PFM_OFFSET_MAGIC_1, + SPAV3_1_SEL_LAST /* counting symbol */ +}; + +enum spav3_counter_2_perf_types { + SPAV3_2_SEL_BASE = -1 + PFM_OFFSET_MAGIC_2, /* counting symbol */ + SPAV3_2_SEL_TOTAL_CYCLES = 0 + PFM_OFFSET_MAGIC_2, + SPAV3_2_SEL_COMPLETED_INSTRUCTION = 1 + PFM_OFFSET_MAGIC_2, + SPAV3_2_SEL_CONDITIONAL_BRANCH_MISPREDICT = 2 + PFM_OFFSET_MAGIC_2, + SPAV3_2_SEL_TAKEN_CONDITIONAL_BRANCH_MISPREDICT = + 3 + PFM_OFFSET_MAGIC_2, + SPAV3_2_SEL_PREFETCH_INSTRUCTION_CACHE_HIT = 4 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_RET_MISPREDICT = 5 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_IMMEDIATE_J_INST = 6 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_MULTIPLY_INST = 7 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_16_BIT_INST = 8 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_FAILED_SCW_INST = 9 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_LD_AFTER_ST_CONFLICT_REPLAYS = 10 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_TAKEN_EXCEPTIONS = 12 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_STORES_COMPLETED = 13 + PFM_OFFSET_MAGIC_2, + SPAV3_2_SEL_UITLB_MISS = 14 + PFM_OFFSET_MAGIC_2, + SPAV3_2_SEL_UDTLB_MISS = 15 + PFM_OFFSET_MAGIC_2, + SPAV3_2_SEL_MTLB_MISS = 16 + PFM_OFFSET_MAGIC_2, + SPAV3_2_SEL_CODE_CACHE_MISS = 17 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_EMPTY_INST_QUEUE_STALL_CYCLES = 18 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_DATA_WRITE_BACK = 19 + PFM_OFFSET_MAGIC_2, + SPAV3_2_SEL_DATA_CACHE_MISS = 21 + PFM_OFFSET_MAGIC_2, + SPAV3_2_SEL_LOAD_DATA_CACHE_MISS = 22 + PFM_OFFSET_MAGIC_2, + SPAV3_2_SEL_STORE_DATA_CACHE_MISS = 23 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_DLM_ACCESS = 24 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_LSU_BIU_REQUEST = 25 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_HPTWK_BIU_REQUEST = 26 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_DMA_BIU_REQUEST = 27 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_CODE_CACHE_FILL_BIU_REQUEST = 28 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_EXTERNAL_EVENTS = 29 + PFM_OFFSET_MAGIC_2, + SPAV3_1_SEL_POP25 = 30 + PFM_OFFSET_MAGIC_2, + SPAV3_2_SEL_LAST /* counting symbol */ +}; + +/* Get converted event counter index */ +static inline int get_converted_event_idx(unsigned long event) +{ + int idx; + + if ((event) > SPAV3_0_SEL_BASE && event < SPAV3_0_SEL_LAST) { + idx = 0; + } else if ((event) > SPAV3_1_SEL_BASE && event < SPAV3_1_SEL_LAST) { + idx = 1; + } else if ((event) > SPAV3_2_SEL_BASE && event < SPAV3_2_SEL_LAST) { + idx = 2; + } else { + pr_err("GET_CONVERTED_EVENT_IDX PFM counter range error\n"); + return -EPERM; + } + + return idx; +} + +/* Get converted hardware event number */ +static inline u32 get_converted_evet_hw_num(u32 event) +{ + if (event > SPAV3_0_SEL_BASE && event < SPAV3_0_SEL_LAST) + event -= PFM_OFFSET_MAGIC_0; + else if (event > SPAV3_1_SEL_BASE && event < SPAV3_1_SEL_LAST) + event -= PFM_OFFSET_MAGIC_1; + else if (event > SPAV3_2_SEL_BASE && event < SPAV3_2_SEL_LAST) + event -= PFM_OFFSET_MAGIC_2; + else if (event != 0) + pr_err("GET_CONVERTED_EVENT_HW_NUM PFM counter range error\n"); + + return event; +} + +/* + * NDS32 HW events mapping + * + * The hardware events that we support. We do support cache operations but + * we have harvard caches and no way to combine instruction and data + * accesses/misses in hardware. + */ +static const unsigned int nds32_pfm_perf_map[PERF_COUNT_HW_MAX] = { + [PERF_COUNT_HW_CPU_CYCLES] = SPAV3_0_SEL_TOTAL_CYCLES, + [PERF_COUNT_HW_INSTRUCTIONS] = SPAV3_1_SEL_COMPLETED_INSTRUCTION, + [PERF_COUNT_HW_CACHE_REFERENCES] = SPAV3_1_SEL_DATA_CACHE_ACCESS, + [PERF_COUNT_HW_CACHE_MISSES] = SPAV3_2_SEL_DATA_CACHE_MISS, + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_BRANCH_MISSES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_REF_CPU_CYCLES] = HW_OP_UNSUPPORTED +}; + +static const unsigned int nds32_pfm_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX] = { + [C(L1D)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = + SPAV3_1_SEL_LOAD_DATA_CACHE_ACCESS, + [C(RESULT_MISS)] = + SPAV3_2_SEL_LOAD_DATA_CACHE_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = + SPAV3_1_SEL_STORE_DATA_CACHE_ACCESS, + [C(RESULT_MISS)] = + SPAV3_2_SEL_STORE_DATA_CACHE_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = + CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = + CACHE_OP_UNSUPPORTED, + }, + }, + [C(L1I)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = + SPAV3_1_SEL_CODE_CACHE_ACCESS, + [C(RESULT_MISS)] = + SPAV3_2_SEL_CODE_CACHE_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = + SPAV3_1_SEL_CODE_CACHE_ACCESS, + [C(RESULT_MISS)] = + SPAV3_2_SEL_CODE_CACHE_MISS, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = + CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + /* TODO: L2CC */ + [C(LL)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = + CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + /* NDS32 PMU does not support TLB read/write hit/miss, + * However, it can count access/miss, which mixed with read and write. + * Therefore, only READ counter will use it. + * We do as possible as we can. + */ + [C(DTLB)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = + SPAV3_1_SEL_UDTLB_ACCESS, + [C(RESULT_MISS)] = + SPAV3_2_SEL_UDTLB_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = + CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = + CACHE_OP_UNSUPPORTED, + }, + }, + [C(ITLB)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = + SPAV3_1_SEL_UITLB_ACCESS, + [C(RESULT_MISS)] = + SPAV3_2_SEL_UITLB_MISS, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = + CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = + CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = + CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = + CACHE_OP_UNSUPPORTED, + }, + }, + [C(BPU)] = { /* What is BPU? */ + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = + CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = + CACHE_OP_UNSUPPORTED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = + CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = + CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = + CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = + CACHE_OP_UNSUPPORTED, + }, + }, + [C(NODE)] = { /* What is NODE? */ + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = + CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = + CACHE_OP_UNSUPPORTED, + }, + }, +}; + +int nds32_pmu_map_event(struct perf_event *event, + const unsigned int (*event_map)[PERF_COUNT_HW_MAX], + const unsigned int (*cache_map)[PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX], u32 raw_event_mask); + +#endif /* __ASM_PMU_H */ |