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Diffstat (limited to 'include/linux/perfmon_pmu.h')
| -rw-r--r-- | include/linux/perfmon_pmu.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/include/linux/perfmon_pmu.h b/include/linux/perfmon_pmu.h new file mode 100644 index 000000000000..13d357140243 --- /dev/null +++ b/include/linux/perfmon_pmu.h @@ -0,0 +1,138 @@ +/* + * Copyright (c) 2006 Hewlett-Packard Development Company, L.P. + * Contributed by Stephane Eranian <eranian@hpl.hp.com> + * + * Interface for PMU description modules + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + * 02111-1307 USA + */ +#ifndef __PERFMON_PMU_H__ +#define __PERFMON_PMU_H__ 1 + +/* + * generic information about a PMC or PMD register + */ +struct pfm_regmap_desc { + u16 type; /* register infos */ + u16 reserved1; /* for future use */ + u32 reserved2; /* for future use */ + u64 dfl_val; /* power-on default value (quiescent) */ + u64 rsvd_msk; /* reserved bits: 1 means reserved */ + u64 no_emul64_msk; /* bits to clear for PFM_REGFL_NO_EMUL64 */ + unsigned long hw_addr; /* HW register address or index */ + struct kobject kobj; /* for internal use only */ + char *desc; /* HW register description string */ + u64 dep_pmcs[PFM_PMC_BV];/* depending PMC registers */ +}; + +/* + * pfm_reg_desc helper macros + */ +#define PMC_D(t, d, v, r, n, h) \ + { .type = t, \ + .desc = d, \ + .dfl_val = v, \ + .rsvd_msk = r, \ + .no_emul64_msk = n, \ + .hw_addr = h \ + } + +#define PMD_D(t, d, h) \ + { .type = t, \ + .desc = d, \ + .rsvd_msk = 0, \ + .no_emul64_msk = 0, \ + .hw_addr = h \ + } + +#define PMD_DR(t, d, h, r) \ + { .type = t, \ + .desc = d, \ + .rsvd_msk = r, \ + .no_emul64_msk = 0, \ + .hw_addr = h \ + } + +#define PMX_NA \ + { .type = PFM_REG_NA } + +/* + * type of a PMU register (16-bit bitmask) for use with pfm_reg_desc.type + */ +#define PFM_REG_NA 0x00 /* not avail. (not impl.,no access) must be 0 */ +#define PFM_REG_I 0x01 /* PMC/PMD: implemented */ +#define PFM_REG_WC 0x02 /* PMC: has write_checker */ +#define PFM_REG_C64 0x04 /* PMD: 64-bit virtualization */ +#define PFM_REG_RO 0x08 /* PMD: read-only (writes ignored) */ +#define PFM_REG_INTR 0x20 /* PMD: register can generate interrupt */ +#define PFM_REG_NO64 0x100 /* PMC: supports PFM_REGFL_NO_EMUL64 */ + +/* + * define some shortcuts for common types + */ +#define PFM_REG_W (PFM_REG_WC|PFM_REG_I) +#define PFM_REG_W64 (PFM_REG_WC|PFM_REG_NO64|PFM_REG_I) +#define PFM_REG_C (PFM_REG_C64|PFM_REG_INTR|PFM_REG_I) +#define PFM_REG_I64 (PFM_REG_NO64|PFM_REG_I) +#define PFM_REG_IRO (PFM_REG_I|PFM_REG_RO) + +typedef int (*pfm_pmc_check_t)(struct pfm_context *ctx, + struct pfm_event_set *set, + struct pfarg_pmr *req); + +typedef int (*pfm_pmd_check_t)(struct pfm_context *ctx, + struct pfm_event_set *set, + struct pfarg_pmr *req); + +/* + * structure used by pmu description modules + * + * probe_pmu() routine return value: + * - 1 means recognized PMU + * - 0 means not recognized PMU + */ +struct pfm_pmu_config { + char *pmu_name; /* PMU family name */ + char *version; /* config module version */ + + int counter_width; /* width of hardware counter */ + + struct pfm_regmap_desc *pmc_desc; /* PMC register descriptions */ + struct pfm_regmap_desc *pmd_desc; /* PMD register descriptions */ + + pfm_pmc_check_t pmc_write_check;/* write checker (optional) */ + pfm_pmd_check_t pmd_write_check;/* write checker (optional) */ + pfm_pmd_check_t pmd_read_check; /* read checker (optional) */ + + u16 num_pmc_entries;/* #entries in pmc_desc */ + u16 num_pmd_entries;/* #entries in pmd_desc */ + void *pmu_info; /* model-specific infos */ + /* + * fields computed internally, do not set in module + */ + struct pfm_regdesc regs_all; /* regs available to all */ + u64 ovfl_mask; /* overflow mask */ +}; + +static inline void *pfm_pmu_info(void) +{ + return pfm_pmu_conf->pmu_info; +} + +int pfm_pmu_register(struct pfm_pmu_config *cfg); + +int pfm_sysfs_add_pmu(struct pfm_pmu_config *pmu); + +#endif /* __PERFMON_PMU_H__ */ |