diff options
Diffstat (limited to 'driver/gator_ebs.c')
| -rw-r--r-- | driver/gator_ebs.c | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/driver/gator_ebs.c b/driver/gator_ebs.c deleted file mode 100644 index 6abdfa4..0000000 --- a/driver/gator_ebs.c +++ /dev/null @@ -1,156 +0,0 @@ -/** - * Copyright (C) ARM Limited 2012. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ - -#if defined(__arm__) && (GATOR_PERF_PMU_SUPPORT) -#include <linux/platform_device.h> -#include <linux/interrupt.h> -#include <linux/irq.h> - -#include <asm/pmu.h> - -static DEFINE_MUTEX(perf_mutex); - -extern int pmnc_counters; -extern int ccnt; -extern unsigned long pmnc_enabled[]; -extern unsigned long pmnc_event[]; -extern unsigned long pmnc_count[]; -extern unsigned long pmnc_key[]; - -static DEFINE_PER_CPU(struct perf_event_attr *, pevent_attr); -static DEFINE_PER_CPU(int, key); - -#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 1, 0) -static void ebs_overflow_handler(struct perf_event *event, int unused, struct perf_sample_data *data, struct pt_regs *regs) -#else -static void ebs_overflow_handler(struct perf_event *event, struct perf_sample_data *data, struct pt_regs *regs) -#endif -{ - int cpu = smp_processor_id(); - - if (event != per_cpu(pevent_ebs, cpu)) - return; - - // Output backtrace - gator_add_sample(cpu, BACKTRACE_BUF, regs); - - // Collect counters - collect_counters(); -} - -static void gator_event_sampling_online_dispatch(int cpu) -{ - struct perf_event * ev; - - if (!event_based_sampling) - return; - -#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 1, 0) - ev = perf_event_create_kernel_counter(per_cpu(pevent_attr, cpu), cpu, 0, ebs_overflow_handler); -#else - ev = perf_event_create_kernel_counter(per_cpu(pevent_attr, cpu), cpu, 0, ebs_overflow_handler, 0); -#endif - - if (IS_ERR(ev)) { - pr_err("gator: unable to start event-based-sampling"); - return; - } - - if (ev->state != PERF_EVENT_STATE_ACTIVE) { - pr_err("gator: unable to start event-based-sampling"); - perf_event_release_kernel(ev); - return; - } - - ev->pmu->read(ev); - per_cpu(pevent_ebs, cpu) = ev; -} - -static void gator_event_sampling_offline_dispatch(int cpu) -{ - struct perf_event * pe = NULL; - - mutex_lock(&perf_mutex); - if (per_cpu(pevent_ebs, cpu)) { - pe = per_cpu(pevent_ebs, cpu); - per_cpu(pevent_ebs, cpu) = NULL; - } - mutex_unlock(&perf_mutex); - - if (pe) { - perf_event_release_kernel(pe); - } -} - -static int gator_event_sampling_start(void) -{ - int cnt, event = 0, count = 0, ebs_key = 0, cpu; - - for_each_present_cpu(cpu) { - per_cpu(pevent_ebs, cpu) = NULL; - per_cpu(pevent_attr, cpu) = NULL; - } - - event_based_sampling = false; - for (cnt = 0; cnt < pmnc_counters; cnt++) { - if (pmnc_count[cnt] > 0) { - event_based_sampling = true; - event = pmnc_event[cnt]; - count = pmnc_count[cnt]; - ebs_key = pmnc_key[cnt]; - break; - } - } - - if (!event_based_sampling) - return 0; - - for_each_present_cpu(cpu) { - u32 size = sizeof(struct perf_event_attr); - per_cpu(pevent_attr, cpu) = kmalloc(size, GFP_KERNEL); - if (!per_cpu(pevent_attr, cpu)) - return -1; - - memset(per_cpu(pevent_attr, cpu), 0, size); - per_cpu(pevent_attr, cpu)->type = PERF_TYPE_RAW; - per_cpu(pevent_attr, cpu)->size = size; - per_cpu(pevent_attr, cpu)->config = event; - per_cpu(pevent_attr, cpu)->sample_period = count; - per_cpu(pevent_attr, cpu)->pinned = 1; - - // handle special case for ccnt - if (cnt == ccnt) { - per_cpu(pevent_attr, cpu)->type = PERF_TYPE_HARDWARE; - per_cpu(pevent_attr, cpu)->config = PERF_COUNT_HW_CPU_CYCLES; - } - - per_cpu(key, cpu) = ebs_key; - } - - return 0; -} - -static void gator_event_sampling_stop(void) -{ - int cpu; - - for_each_present_cpu(cpu) { - if (per_cpu(pevent_attr, cpu)) { - kfree(per_cpu(pevent_attr, cpu)); - per_cpu(pevent_attr, cpu) = NULL; - } - } -} - -#else -static void gator_event_sampling_online_dispatch(int cpu) {} -static void gator_event_sampling_offline_dispatch(int cpu) {} -static int gator_event_sampling_start(void) {return 0;} -static void gator_event_sampling_stop(void) {} -#endif |