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/* arch/arm/mach-msm/smp2p_debug.c
*
* Copyright (c) 2013, The Linux Foundation. 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 and
* only version 2 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.
*/
#include <linux/ctype.h>
#include <linux/list.h>
#include <linux/debugfs.h>
#include "smp2p_private.h"
#if defined(CONFIG_DEBUG_FS)
/**
* Dump interrupt statistics.
*
* @s: pointer to output file
*/
static void smp2p_int_stats(struct seq_file *s)
{
struct smp2p_interrupt_config *int_cfg;
int pid;
int_cfg = smp2p_get_interrupt_config();
if (!int_cfg)
return;
seq_printf(s, "| Processor | Incoming Id | Incoming # |");
seq_printf(s, " Outgoing # | Base Ptr | Mask |\n");
for (pid = 0; pid < SMP2P_NUM_PROCS; ++pid) {
if (!int_cfg[pid].is_configured &&
pid != SMP2P_REMOTE_MOCK_PROC)
continue;
seq_printf(s,
"| %5s (%d) | %11u | %10u | %10u | %p | %08x |\n",
int_cfg[pid].name,
pid, int_cfg[pid].in_int_id,
int_cfg[pid].in_interrupt_count,
int_cfg[pid].out_interrupt_count,
int_cfg[pid].out_int_ptr,
int_cfg[pid].out_int_mask);
}
}
/**
* Dump item header line 1.
*
* @buf: output buffer
* @max: length of output buffer
* @item_ptr: SMEM item pointer
* @state: item state
* @returns: Number of bytes written to output buffer
*/
static int smp2p_item_header1(char *buf, int max, struct smp2p_smem *item_ptr,
enum msm_smp2p_edge_state state)
{
int i = 0;
const char *state_text;
if (!item_ptr) {
i += scnprintf(buf + i, max - i, "None");
return i;
}
switch (state) {
case SMP2P_EDGE_STATE_CLOSED:
state_text = "State: Closed";
break;
case SMP2P_EDGE_STATE_OPENING:
state_text = "State: Opening";
break;
case SMP2P_EDGE_STATE_OPENED:
state_text = "State: Opened";
break;
default:
state_text = "";
break;
}
i += scnprintf(buf + i, max - i,
"%-14s LPID %d RPID %d",
state_text,
SMP2P_GET_LOCAL_PID(item_ptr->rem_loc_proc_id),
SMP2P_GET_REMOTE_PID(item_ptr->rem_loc_proc_id)
);
return i;
}
/**
* Dump item header line 2.
*
* @buf: output buffer
* @max: length of output buffer
* @item_ptr: SMEM item pointer
* @returns: Number of bytes written to output buffer
*/
static int smp2p_item_header2(char *buf, int max, struct smp2p_smem *item_ptr)
{
int i = 0;
if (!item_ptr) {
i += scnprintf(buf + i, max - i, "None");
return i;
}
i += scnprintf(buf + i, max - i,
"Version: %08x Features: %08x",
SMP2P_GET_VERSION(item_ptr->feature_version),
SMP2P_GET_FEATURES(item_ptr->feature_version)
);
return i;
}
/**
* Dump item header line 3.
*
* @buf: output buffer
* @max: length of output buffer
* @item_ptr: SMEM item pointer
* @state: item state
* @returns: Number of bytes written to output buffer
*/
static int smp2p_item_header3(char *buf, int max, struct smp2p_smem *item_ptr)
{
int i = 0;
if (!item_ptr) {
i += scnprintf(buf + i, max - i, "None");
return i;
}
i += scnprintf(buf + i, max - i,
"Entries #/Max: %d/%d Flags: %c%c",
SMP2P_GET_ENT_VALID(item_ptr->valid_total_ent),
SMP2P_GET_ENT_TOTAL(item_ptr->valid_total_ent),
item_ptr->flags & SMP2P_FLAGS_RESTART_ACK_MASK ? 'A' : 'a',
item_ptr->flags & SMP2P_FLAGS_RESTART_DONE_MASK ? 'D' : 'd'
);
return i;
}
/**
* Dump individual input/output item pair.
*
* @s: pointer to output file
*/
static void smp2p_item(struct seq_file *s, int remote_pid)
{
struct smp2p_smem *out_ptr;
struct smp2p_smem *in_ptr;
struct smp2p_interrupt_config *int_cfg;
char tmp_buff[64];
int state;
int entry;
struct smp2p_entry_v1 *out_entries = NULL;
struct smp2p_entry_v1 *in_entries = NULL;
int out_valid = 0;
int in_valid = 0;
int_cfg = smp2p_get_interrupt_config();
if (!int_cfg)
return;
if (!int_cfg[remote_pid].is_configured &&
remote_pid != SMP2P_REMOTE_MOCK_PROC)
return;
out_ptr = smp2p_get_out_item(remote_pid, &state);
in_ptr = smp2p_get_in_item(remote_pid);
if (!out_ptr && !in_ptr)
return;
/* print item headers */
seq_printf(s, "%s%s\n",
" ====================================== ",
"======================================");
scnprintf(tmp_buff, sizeof(tmp_buff),
"Apps(%d)->%s(%d)",
SMP2P_APPS_PROC, int_cfg[remote_pid].name, remote_pid);
seq_printf(s, "| %-37s", tmp_buff);
scnprintf(tmp_buff, sizeof(tmp_buff),
"%s(%d)->Apps(%d)",
int_cfg[remote_pid].name, remote_pid, SMP2P_APPS_PROC);
seq_printf(s, "| %-37s|\n", tmp_buff);
seq_printf(s, "%s%s\n",
" ====================================== ",
"======================================");
smp2p_item_header1(tmp_buff, sizeof(tmp_buff), out_ptr, state);
seq_printf(s, "| %-37s", tmp_buff);
smp2p_item_header1(tmp_buff, sizeof(tmp_buff), in_ptr, -1);
seq_printf(s, "| %-37s|\n", tmp_buff);
smp2p_item_header2(tmp_buff, sizeof(tmp_buff), out_ptr);
seq_printf(s, "| %-37s", tmp_buff);
smp2p_item_header2(tmp_buff, sizeof(tmp_buff), in_ptr);
seq_printf(s, "| %-37s|\n", tmp_buff);
smp2p_item_header3(tmp_buff, sizeof(tmp_buff), out_ptr);
seq_printf(s, "| %-37s", tmp_buff);
smp2p_item_header3(tmp_buff, sizeof(tmp_buff), in_ptr);
seq_printf(s, "| %-37s|\n", tmp_buff);
seq_printf(s, " %s%s\n",
"-------------------------------------- ",
"--------------------------------------");
seq_printf(s, "| %-37s",
"Entry Name Value");
seq_printf(s, "| %-37s|\n",
"Entry Name Value");
seq_printf(s, " %s%s\n",
"-------------------------------------- ",
"--------------------------------------");
/* print entries */
if (out_ptr) {
out_entries = (struct smp2p_entry_v1 *)((void *)out_ptr +
sizeof(struct smp2p_smem));
out_valid = SMP2P_GET_ENT_VALID(out_ptr->valid_total_ent);
}
if (in_ptr) {
in_entries = (struct smp2p_entry_v1 *)((void *)in_ptr +
sizeof(struct smp2p_smem));
in_valid = SMP2P_GET_ENT_VALID(in_ptr->valid_total_ent);
}
for (entry = 0; out_entries || in_entries; ++entry) {
if (out_entries && entry < out_valid) {
scnprintf(tmp_buff, sizeof(tmp_buff),
"%-16s 0x%08x",
out_entries->name,
out_entries->entry);
++out_entries;
} else {
out_entries = NULL;
scnprintf(tmp_buff, sizeof(tmp_buff), "None");
}
seq_printf(s, "| %-37s", tmp_buff);
if (in_entries && entry < in_valid) {
scnprintf(tmp_buff, sizeof(tmp_buff),
"%-16s 0x%08x",
in_entries->name,
in_entries->entry);
++in_entries;
} else {
in_entries = NULL;
scnprintf(tmp_buff, sizeof(tmp_buff), "None");
}
seq_printf(s, "| %-37s|\n", tmp_buff);
}
seq_printf(s, " %s%s\n\n",
"-------------------------------------- ",
"--------------------------------------");
}
/**
* Dump item state.
*
* @s: pointer to output file
*/
static void smp2p_items(struct seq_file *s)
{
int pid;
for (pid = 0; pid < SMP2P_NUM_PROCS; ++pid)
smp2p_item(s, pid);
}
static struct dentry *dent;
static int debugfs_show(struct seq_file *s, void *data)
{
void (*show)(struct seq_file *) = s->private;
show(s);
return 0;
}
static int debug_open(struct inode *inode, struct file *file)
{
return single_open(file, debugfs_show, inode->i_private);
}
static const struct file_operations debug_ops = {
.open = debug_open,
.release = single_release,
.read = seq_read,
.llseek = seq_lseek,
};
void debug_create(const char *name,
void (*show)(struct seq_file *))
{
struct dentry *file;
file = debugfs_create_file(name, 0444, dent, show, &debug_ops);
if (!file)
pr_err("%s: unable to create file '%s'\n", __func__, name);
}
static int __init smp2p_debugfs_init(void)
{
dent = debugfs_create_dir("smp2p", 0);
if (IS_ERR(dent))
return PTR_ERR(dent);
debug_create("int_stats", smp2p_int_stats);
debug_create("items", smp2p_items);
return 0;
}
late_initcall(smp2p_debugfs_init);
#endif /* CONFIG_DEBUG_FS */