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/*
* drivers/misc/tegra-profiler/quadd_proc.c
*
* Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
*/
#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/tegra_profiler.h>
#include "quadd.h"
#include "version.h"
#include "quadd_proc.h"
#include "arm_pmu.h"
#define YES_NO(x) ((x) ? "yes" : "no")
static struct quadd_ctx *ctx;
#define QUADD_PROC_DEV QUADD_DEVICE_NAME
static int show_version(struct seq_file *f, void *offset)
{
seq_printf(f, "version: %s\n", QUADD_MODULE_VERSION);
seq_printf(f, "branch: %s\n", QUADD_MODULE_BRANCH);
seq_printf(f, "samples version: %d\n", QUADD_SAMPLES_VERSION);
seq_printf(f, "io version: %d\n", QUADD_IO_VERSION);
return 0;
}
static int show_version_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, show_version, NULL);
}
static const struct file_operations version_proc_fops = {
.open = show_version_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int show_capabilities(struct seq_file *f, void *offset)
{
struct quadd_comm_cap *cap = &ctx->cap;
struct quadd_events_cap *event = &cap->events_cap;
unsigned int extra = cap->reserved[QUADD_COMM_CAP_IDX_EXTRA];
struct quadd_arch_info *arch = NULL;
if (ctx->pmu)
arch = ctx->pmu->get_arch();
seq_printf(f, "pmu: %s\n",
YES_NO(cap->pmu));
seq_printf(f, "tegra 3 LP cluster: %s\n",
YES_NO(cap->tegra_lp_cluster));
seq_printf(f, "power rate samples: %s\n",
YES_NO(cap->power_rate));
seq_printf(f, "l2 cache: %s\n",
YES_NO(cap->l2_cache));
if (cap->l2_cache) {
seq_printf(f, "multiple l2 events: %s\n",
YES_NO(cap->l2_multiple_events));
}
seq_printf(f, "support polling mode: %s\n",
YES_NO(cap->blocked_read));
seq_printf(f, "backtrace from the kernel ctx: %s\n",
YES_NO(extra & QUADD_COMM_CAP_EXTRA_BT_KERNEL_CTX));
seq_printf(f, "send mmap regions at the start: %s\n",
YES_NO(extra & QUADD_COMM_CAP_EXTRA_GET_MMAP));
seq_printf(f, "group samples: %s\n",
YES_NO(extra & QUADD_COMM_CAP_EXTRA_GROUP_SAMPLES));
seq_printf(f, "unwinding based on ex-handling tables: %s\n",
YES_NO(extra & QUADD_COMM_CAP_EXTRA_BT_UNWIND_TABLES));
seq_printf(f, "support AArch64 architecture: %s\n",
YES_NO(extra & QUADD_COMM_CAP_EXTRA_SUPPORT_AARCH64));
seq_printf(f, "support special architecture mappings: %s\n",
YES_NO(extra & QUADD_COMM_CAP_EXTRA_SPECIAL_ARCH_MMAP));
seq_printf(f, "support mixed unwinding mode: %s\n",
YES_NO(extra & QUADD_COMM_CAP_EXTRA_UNWIND_MIXED));
seq_printf(f, "information about unwind entry: %s\n",
YES_NO(extra & QUADD_COMM_CAP_EXTRA_UNW_ENTRY_TYPE));
seq_printf(f, "arch timer is available: %s\n",
YES_NO(extra & QUADD_COMM_CAP_EXTRA_ARCH_TIMER));
seq_printf(f, "ring buffer mmap operation: %s\n",
YES_NO(extra & QUADD_COMM_CAP_EXTRA_RB_MMAP_OP));
seq_puts(f, "\n");
if (arch) {
seq_printf(f, "pmu arch: %s\n",
arch->name);
seq_printf(f, "pmu arch version: %d\n",
arch->ver);
}
seq_puts(f, "\n");
seq_puts(f, "Supported events:\n");
seq_printf(f, "cpu_cycles: %s\n",
YES_NO(event->cpu_cycles));
seq_printf(f, "instructions: %s\n",
YES_NO(event->instructions));
seq_printf(f, "branch_instructions: %s\n",
YES_NO(event->branch_instructions));
seq_printf(f, "branch_misses: %s\n",
YES_NO(event->branch_misses));
seq_printf(f, "bus_cycles: %s\n",
YES_NO(event->bus_cycles));
seq_printf(f, "l1_dcache_read_misses: %s\n",
YES_NO(event->l1_dcache_read_misses));
seq_printf(f, "l1_dcache_write_misses: %s\n",
YES_NO(event->l1_dcache_write_misses));
seq_printf(f, "l1_icache_misses: %s\n",
YES_NO(event->l1_icache_misses));
seq_printf(f, "l2_dcache_read_misses: %s\n",
YES_NO(event->l2_dcache_read_misses));
seq_printf(f, "l2_dcache_write_misses: %s\n",
YES_NO(event->l2_dcache_write_misses));
seq_printf(f, "l2_icache_misses: %s\n",
YES_NO(event->l2_icache_misses));
return 0;
}
static int show_capabilities_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, show_capabilities, NULL);
}
static const struct file_operations capabilities_proc_fops = {
.open = show_capabilities_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int show_status(struct seq_file *f, void *offset)
{
unsigned int status;
unsigned int is_auth_open, active;
struct quadd_module_state s;
quadd_get_state(&s);
status = s.reserved[QUADD_MOD_STATE_IDX_STATUS];
active = status & QUADD_MOD_STATE_STATUS_IS_ACTIVE;
is_auth_open = status & QUADD_MOD_STATE_STATUS_IS_AUTH_OPEN;
seq_printf(f, "status: %s\n", active ? "active" : "waiting");
seq_printf(f, "auth: %s\n", YES_NO(is_auth_open));
seq_printf(f, "all samples: %llu\n", s.nr_all_samples);
seq_printf(f, "skipped samples: %llu\n", s.nr_skipped_samples);
return 0;
}
static int show_status_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, show_status, NULL);
}
static const struct file_operations status_proc_fops = {
.open = show_status_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
void quadd_proc_init(struct quadd_ctx *context)
{
ctx = context;
proc_mkdir(QUADD_PROC_DEV, NULL);
proc_create(QUADD_PROC_DEV "/version", 0, NULL, &version_proc_fops);
proc_create(QUADD_PROC_DEV "/capabilities", 0, NULL,
&capabilities_proc_fops);
proc_create(QUADD_PROC_DEV "/status", 0, NULL, &status_proc_fops);
}
void quadd_proc_deinit(void)
{
remove_proc_entry(QUADD_PROC_DEV "/version", NULL);
remove_proc_entry(QUADD_PROC_DEV "/capabilities", NULL);
remove_proc_entry(QUADD_PROC_DEV "/status", NULL);
remove_proc_entry(QUADD_PROC_DEV, NULL);
}
#endif /* CONFIG_PROC_FS */
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