diff options
Diffstat (limited to 'drivers/gator/driver/gator_events_power.c')
| -rw-r--r-- | drivers/gator/driver/gator_events_power.c | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/drivers/gator/driver/gator_events_power.c b/drivers/gator/driver/gator_events_power.c deleted file mode 100644 index a0ae684827d..00000000000 --- a/drivers/gator/driver/gator_events_power.c +++ /dev/null @@ -1,178 +0,0 @@ -/** - * Copyright (C) ARM Limited 2011-2012. 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. - * - */ - -#include "gator.h" -#include <linux/slab.h> -#include <linux/cpufreq.h> -#include <trace/events/power.h> - -// cpu_frequency and cpu_idle trace points were introduced in Linux kernel v2.6.38 -// the now deprecated power_frequency trace point was available prior to 2.6.38, but only for x86 -// CPU Idle is currently disabled in the .xml -#if GATOR_CPU_FREQ_SUPPORT -enum { - POWER_CPU_FREQ, - POWER_CPU_IDLE, - POWER_TOTAL -}; - -static ulong power_cpu_enabled[POWER_TOTAL]; -static ulong power_cpu_key[POWER_TOTAL]; -static DEFINE_PER_CPU(ulong[POWER_TOTAL], power); -static DEFINE_PER_CPU(ulong[POWER_TOTAL], prev); -static DEFINE_PER_CPU(int *, powerGet); - -GATOR_DEFINE_PROBE(cpu_frequency, TP_PROTO(unsigned int frequency, unsigned int cpu)) -{ - per_cpu(power, cpu)[POWER_CPU_FREQ] = frequency * 1000; -} - -GATOR_DEFINE_PROBE(cpu_idle, TP_PROTO(unsigned int state, unsigned int cpu)) -{ - per_cpu(power, cpu)[POWER_CPU_IDLE] = state; -} - -static int gator_events_power_create_files(struct super_block *sb, struct dentry *root) -{ - struct dentry *dir; - - // cpu_frequency - dir = gatorfs_mkdir(sb, root, "Linux_power_cpu_freq"); - if (!dir) { - return -1; - } - gatorfs_create_ulong(sb, dir, "enabled", &power_cpu_enabled[POWER_CPU_FREQ]); - gatorfs_create_ro_ulong(sb, dir, "key", &power_cpu_key[POWER_CPU_FREQ]); - - // cpu_idle - dir = gatorfs_mkdir(sb, root, "Linux_power_cpu_idle"); - if (!dir) { - return -1; - } - gatorfs_create_ulong(sb, dir, "enabled", &power_cpu_enabled[POWER_CPU_IDLE]); - gatorfs_create_ro_ulong(sb, dir, "key", &power_cpu_key[POWER_CPU_IDLE]); - - return 0; -} - -static int gator_events_power_populate(int cpu, int** buffer) -{ - int i, len = 0; - - for (i = 0; i < POWER_TOTAL; i++) { - if (power_cpu_enabled[i]) { - if (per_cpu(power, cpu)[i] != per_cpu(prev, cpu)[i]) { - per_cpu(prev, cpu)[i] = per_cpu(power, cpu)[i]; - per_cpu(powerGet, cpu)[len++] = power_cpu_key[i]; - per_cpu(powerGet, cpu)[len++] = per_cpu(power, cpu)[i]; - } - } - } - - if (buffer) - *buffer = per_cpu(powerGet, cpu); - - return len; -} - -static int gator_events_power_online(int** buffer) -{ - int i, cpu = smp_processor_id(); - for (i = 0; i < POWER_TOTAL; i++) - per_cpu(prev, cpu)[i] = -1; - per_cpu(power, cpu)[POWER_CPU_FREQ] = cpufreq_quick_get(cpu) * 1000; - return gator_events_power_populate(cpu, buffer); -} - -static int gator_events_power_offline(int** buffer) -{ - int cpu = smp_processor_id(); - // Set frequency to zero on an offline - per_cpu(power, cpu)[POWER_CPU_FREQ] = 0; - return gator_events_power_populate(cpu, buffer); -} - -static int gator_events_power_start(void) -{ - int cpu; - - for_each_present_cpu(cpu) { - per_cpu(powerGet, cpu) = kmalloc(POWER_TOTAL * 2, GFP_KERNEL); - if (!per_cpu(powerGet, cpu)) - return -1; - } - - // register tracepoints - if (power_cpu_enabled[POWER_CPU_FREQ]) - if (GATOR_REGISTER_TRACE(cpu_frequency)) - goto fail_cpu_frequency_exit; - if (power_cpu_enabled[POWER_CPU_IDLE]) - if (GATOR_REGISTER_TRACE(cpu_idle)) - goto fail_cpu_idle_exit; - pr_debug("gator: registered power event tracepoints\n"); - - return 0; - - // unregister tracepoints on error -fail_cpu_idle_exit: - GATOR_UNREGISTER_TRACE(cpu_frequency); -fail_cpu_frequency_exit: - pr_err("gator: power event tracepoints failed to activate, please verify that tracepoints are enabled in the linux kernel\n"); - - return -1; -} - -static void gator_events_power_stop(void) -{ - int i, cpu; - if (power_cpu_enabled[POWER_CPU_FREQ]) - GATOR_UNREGISTER_TRACE(cpu_frequency); - if (power_cpu_enabled[POWER_CPU_IDLE]) - GATOR_UNREGISTER_TRACE(cpu_idle); - pr_debug("gator: unregistered power event tracepoints\n"); - - for (i = 0; i < POWER_TOTAL; i++) { - power_cpu_enabled[i] = 0; - } - - for_each_present_cpu(cpu) { - kfree(per_cpu(powerGet, cpu)); - } -} - -static int gator_events_power_read(int **buffer) -{ - return gator_events_power_populate(smp_processor_id(), buffer); -} - -static struct gator_interface gator_events_power_interface = { - .create_files = gator_events_power_create_files, - .online = gator_events_power_online, - .offline = gator_events_power_offline, - .start = gator_events_power_start, - .stop = gator_events_power_stop, - .read = gator_events_power_read, -}; -#endif - -int gator_events_power_init(void) -{ -#if (GATOR_CPU_FREQ_SUPPORT) - int i; - for (i = 0; i < POWER_TOTAL; i++) { - power_cpu_enabled[i] = 0; - power_cpu_key[i] = gator_events_get_key(); - } - - return gator_events_install(&gator_events_power_interface); -#else - return -1; -#endif -} -gator_events_init(gator_events_power_init); |