diff options
Diffstat (limited to 'drivers/gator/driver/gator_ebs.c')
| -rw-r--r-- | drivers/gator/driver/gator_ebs.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/drivers/gator/driver/gator_ebs.c b/drivers/gator/driver/gator_ebs.c deleted file mode 100644 index 8c2997c57da..00000000000 --- a/drivers/gator/driver/gator_ebs.c +++ /dev/null @@ -1,192 +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> - -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 *, pevent); -static DEFINE_PER_CPU(struct perf_event_attr *, pevent_attr); -static DEFINE_PER_CPU(int, key); -static DEFINE_PER_CPU(unsigned int, prev_value); - -#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 -{ - unsigned int value, delta, cpu = smp_processor_id(), buftype = EVENT_BUF; - - if (event != per_cpu(pevent, cpu)) - return; - - if (buffer_check_space(cpu, buftype, 5 * MAXSIZE_PACK32 + MAXSIZE_PACK64)) { - value = local64_read(&event->count); - delta = value - per_cpu(prev_value, cpu); - per_cpu(prev_value, cpu) = value; - - // Counters header - gator_buffer_write_packed_int(cpu, buftype, MESSAGE_COUNTERS); // type - gator_buffer_write_packed_int64(cpu, buftype, gator_get_time()); // time - - // Output counter - gator_buffer_write_packed_int(cpu, buftype, 2); // length - gator_buffer_write_packed_int(cpu, buftype, per_cpu(key, cpu)); // key - gator_buffer_write_packed_int(cpu, buftype, delta); // delta - - // End Counters, length of zero - gator_buffer_write_packed_int(cpu, buftype, 0); - } - - // Output backtrace - if (buffer_check_space(cpu, buftype, gator_backtrace_depth * 2 * MAXSIZE_PACK32)) - gator_add_sample(cpu, buftype, regs); - - // Check and commit; commit is set to occur once buffer is 3/4 full - buffer_check(cpu, buftype); -} - -static void gator_event_sampling_online(void) -{ - int cpu = smp_processor_id(), buftype = EVENT_BUF; - - // read the counter and toss the invalid data, return zero instead - struct perf_event * ev = per_cpu(pevent, cpu); - if (ev != NULL && ev->state == PERF_EVENT_STATE_ACTIVE) { - ev->pmu->read(ev); - per_cpu(prev_value, cpu) = local64_read(&ev->count); - - // Counters header - gator_buffer_write_packed_int(cpu, buftype, MESSAGE_COUNTERS); // type - gator_buffer_write_packed_int64(cpu, buftype, gator_get_time()); // time - - // Output counter - gator_buffer_write_packed_int(cpu, buftype, 2); // length - gator_buffer_write_packed_int(cpu, buftype, per_cpu(key, cpu)); // key - gator_buffer_write_packed_int(cpu, buftype, 0); // delta - zero for initialization - - // End Counters, length of zero - gator_buffer_write_packed_int(cpu, buftype, 0); - } -} - -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 = per_cpu(pevent, cpu) = perf_event_create_kernel_counter(per_cpu(pevent_attr, cpu), cpu, 0, ebs_overflow_handler); -#else - ev = per_cpu(pevent, cpu) = 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(prev_value, cpu) = local64_read(&ev->count); -} - -static void gator_event_sampling_offline_dispatch(int cpu) -{ - if (per_cpu(pevent, cpu)) { - perf_event_release_kernel(per_cpu(pevent, cpu)); - per_cpu(pevent, cpu) = NULL; - } -} - -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, 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(void) {} -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 |