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/* Copyright (c) 2012-2015,2017 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 "msm_ba_debug.h"
#define MAX_DBG_BUF_SIZE 1008
int msm_ba_debug = BA_ERR | BA_WARN;
int msm_ba_debug_out = BA_OUT_PRINTK;
struct debug_buffer {
char ptr[MAX_DBG_BUF_SIZE];
char *curr;
u32 filled_size;
};
#define INIT_DBG_BUF(__buf) ({ \
__buf->curr = __buf->ptr;\
__buf->filled_size = 0; \
})
static int dev_info_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
static u32 write_str(struct debug_buffer *buffer, const char *fmt, ...)
{
va_list args;
u32 size = 0;
size_t buf_size = 0;
if (MAX_DBG_BUF_SIZE - 1 > buffer->filled_size) {
buf_size = MAX_DBG_BUF_SIZE - 1 - buffer->filled_size;
va_start(args, fmt);
size = vscnprintf(buffer->curr, buf_size, fmt, args);
va_end(args);
buffer->curr += size;
buffer->filled_size += size;
}
return size;
}
static ssize_t dev_info_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct msm_ba_dev *dev_ctxt = file->private_data;
struct debug_buffer *dbg_buf = NULL;
ssize_t size = 0;
if (!dev_ctxt) {
dprintk(BA_ERR, "Invalid params, dev: 0x%pK", dev_ctxt);
return 0;
}
dbg_buf = kmalloc(sizeof(struct debug_buffer), GFP_KERNEL);
if (dbg_buf == NULL)
return 0;
INIT_DBG_BUF(dbg_buf);
write_str(dbg_buf, "===============================");
write_str(dbg_buf, "DEV: 0x%pK", dev_ctxt);
write_str(dbg_buf, "===============================");
write_str(dbg_buf, "state: %d", dev_ctxt->state);
size = simple_read_from_buffer(buf, count, ppos,
dbg_buf->ptr, dbg_buf->filled_size);
kfree(dbg_buf);
return size;
}
static const struct file_operations dev_info_fops = {
.open = dev_info_open,
.read = dev_info_read,
};
struct dentry *msm_ba_debugfs_init_drv(void)
{
bool ok = false;
struct dentry *dir = debugfs_create_dir(BA_DBG_LABEL, NULL);
struct ba_ctxt *ba_ctxt;
if (IS_ERR_OR_NULL(dir)) {
dir = NULL;
goto failed_create_dir;
}
#define __debugfs_create(__type, __name, __value) ({ \
struct dentry *f = debugfs_create_##__type(__name, S_IRUGO | S_IWUSR, \
dir, __value); \
if (IS_ERR_OR_NULL(f)) { \
dprintk(BA_ERR, "Failed creating debugfs file '%pKd/%s'", \
dir, __name); \
f = NULL; \
} \
f; \
})
ok =
__debugfs_create(x32, "debug_level", &msm_ba_debug) &&
__debugfs_create(u32, "debug_output", &msm_ba_debug_out);
#undef __debugfs_create
if (!ok)
goto failed_create_dir;
return dir;
failed_create_dir:
if (dir) {
ba_ctxt = msm_ba_get_ba_context();
debugfs_remove_recursive(ba_ctxt->debugfs_root);
}
return NULL;
}
struct dentry *msm_ba_debugfs_init_dev(struct msm_ba_dev *dev_ctxt,
struct dentry *parent)
{
struct dentry *dir = NULL;
char debugfs_name[MAX_DEBUGFS_NAME];
if (!dev_ctxt) {
dprintk(BA_ERR, "Invalid params, core: %pK", dev_ctxt);
goto failed_create_dir;
}
snprintf(debugfs_name, MAX_DEBUGFS_NAME, "dev_%pK", dev_ctxt);
dir = debugfs_create_dir(debugfs_name, parent);
if (!dir) {
dprintk(BA_ERR, "Failed to create debugfs for msm_ba");
goto failed_create_dir;
}
if (!debugfs_create_file("info", S_IRUGO, dir, dev_ctxt,
&dev_info_fops)) {
dprintk(BA_ERR, "debugfs_create_file: fail");
goto failed_create_dir;
}
failed_create_dir:
return dir;
}
static int inst_info_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
static ssize_t inst_info_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct msm_ba_inst *inst = file->private_data;
struct debug_buffer *dbg_buf = NULL;
ssize_t size = 0;
if (!inst) {
dprintk(BA_ERR, "Invalid params, dev: %pK", inst);
return 0;
}
dbg_buf = kmalloc(sizeof(struct debug_buffer), GFP_KERNEL);
if (dbg_buf == NULL)
return 0;
INIT_DBG_BUF(dbg_buf);
write_str(dbg_buf, "===============================");
write_str(dbg_buf, "INSTANCE: %pK (%s)", inst,
"BA device");
write_str(dbg_buf, "===============================");
write_str(dbg_buf, "dev: %pK", inst->dev_ctxt);
write_str(dbg_buf, "state: %d", inst->state);
size = simple_read_from_buffer(buf, count, ppos,
dbg_buf->ptr, dbg_buf->filled_size);
kfree(dbg_buf);
return size;
}
static const struct file_operations inst_info_fops = {
.open = inst_info_open,
.read = inst_info_read,
};
struct dentry *msm_ba_debugfs_init_inst(struct msm_ba_inst *inst,
struct dentry *parent)
{
struct dentry *dir = NULL;
char debugfs_name[MAX_DEBUGFS_NAME];
if (!inst) {
dprintk(BA_ERR, "Invalid params, inst: %pK", inst);
goto failed_create_dir;
}
snprintf(debugfs_name, MAX_DEBUGFS_NAME, "inst_%pK", inst);
dir = debugfs_create_dir(debugfs_name, parent);
if (!dir) {
dprintk(BA_ERR, "Failed to create debugfs for msm_ba");
goto failed_create_dir;
}
if (!debugfs_create_file("info", S_IRUGO, dir, inst, &inst_info_fops)) {
dprintk(BA_ERR, "debugfs_create_file: fail");
goto failed_create_dir;
}
inst->debug.pdata[SESSION_INIT].sampling = true;
failed_create_dir:
return dir;
}
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