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kernel_samsung_a34x-permissive/drivers/misc/mediatek/scp/rv/scp_logger.c
Fede2782 6db4831e98
Import A346BXXU4BWK2 kernel source 
Android 14
2024-04-28 15:51:13 +02:00

1092 lines
28 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020 MediaTek Inc.
*/
#include <linux/fs.h> /* needed by file_operations* */
#include <linux/miscdevice.h> /* needed by miscdevice* */
#include <linux/device.h> /* needed by device_* */
#include <linux/uaccess.h> /* needed by copy_to_user */
#include <linux/fs.h> /* needed by file_operations* */
#include <linux/slab.h> /* needed by kmalloc */
#include <linux/poll.h> /* needed by poll */
#include <linux/vmalloc.h> /* needed by vmalloc */
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/io.h>
//#include <mt-plat/sync_write.h>
#include "scp_helper.h"
#include "scp_ipi_pin.h"
#include "scp_mbox_layout.h"
#include "scp.h"
#define DRAM_BUF_LEN (1 * 1024 * 1024)
#define SCP_TIMER_TIMEOUT (1 * HZ) /* 1 seconds*/
#define ROUNDUP(a, b) (((a) + ((b)-1)) & ~((b)-1))
#define PLT_LOG_ENABLE 0x504C5402 /*magic*/
#define SCP_IPI_RETRY_TIMES (5000)
/* bit0 = 1, logger is on, else off*/
#define SCP_LOGGER_ON_BIT (1<<0)
/* bit1 = 1, logger_dram_use is on, else off*/
#define SCP_LOGGER_DRAM_ON_BIT (1<<1)
/* bit8 = 1, enable function (logger/logger dram use) */
#define SCP_LOGGER_ON_CTRL_BIT (1<<8)
/* bit8 = 0, disable function */
#define SCP_LOGGER_OFF_CTRL_BIT (0<<8)
/* let logger on */
#define SCP_LOGGER_ON (SCP_LOGGER_ON_CTRL_BIT | SCP_LOGGER_ON_BIT)
/* let logger off */
#define SCP_LOGGER_OFF (SCP_LOGGER_OFF_CTRL_BIT | SCP_LOGGER_ON_BIT)
/* let logger dram use on */
#define SCP_LOGGER_DRAM_ON (SCP_LOGGER_ON_CTRL_BIT | SCP_LOGGER_DRAM_ON_BIT)
/* let logger dram use off */
#define SCP_LOGGER_DRAM_OFF (SCP_LOGGER_OFF_CTRL_BIT | SCP_LOGGER_DRAM_ON_BIT)
#define SCP_LOGGER_UT (1)
struct log_ctrl_s {
unsigned int base;
unsigned int size;
unsigned int enable;
unsigned int info_ofs;
unsigned int buff_ofs;
unsigned int buff_size;
};
struct buffer_info_s {
unsigned int r_pos;
unsigned int w_pos;
};
struct SCP_LOG_INFO {
uint32_t scp_log_dram_addr;
uint32_t scp_log_buf_addr;
uint32_t scp_log_start_addr;
uint32_t scp_log_end_addr;
uint32_t scp_log_buf_maxlen;
};
struct scp_logger_ctrl_msg {
unsigned int cmd;
union {
struct {
unsigned int addr;
unsigned int size;
} init;
struct {
unsigned int enable;
} flag;
struct SCP_LOG_INFO info;
} u;
};
#define SCP_LOGGER_IPI_INIT 0x4C4F4701
#define SCP_LOGGER_IPI_ENABLE 0x4C4F4702
#define SCP_LOGGER_IPI_WAKEUP 0x4C4F4703
#define SCP_LOGGER_IPI_SET_FILTER 0x4C4F4704
static unsigned int scp_A_logger_inited;
static unsigned int scp_A_logger_wakeup_ap;
static struct log_ctrl_s *SCP_A_log_ctl;
static struct buffer_info_s *SCP_A_buf_info;
/*static struct timer_list scp_log_timer;*/
static DEFINE_MUTEX(scp_A_log_mutex);
static DEFINE_SPINLOCK(scp_A_log_buf_spinlock);
static struct scp_work_struct scp_logger_notify_work[SCP_CORE_TOTAL];
/*scp last log info*/
#define LAST_LOG_BUF_SIZE 4095
static struct SCP_LOG_INFO last_log_info;
static char *scp_A_last_log;
static wait_queue_head_t scp_A_logwait;
static DEFINE_MUTEX(scp_logger_mutex);
static char *scp_last_logger;
/*global value*/
unsigned int r_pos_debug;
unsigned int log_ctl_debug;
static struct mutex scp_logger_mutex;
/* ipi message buffer */
struct scp_logger_ctrl_msg msg_scp_logger_ctrl;
/*
* get log from scp when received a buf full notify
* @param id: IPI id
* @param prdata: IPI handler parameter
* @param data: IPI data
* @param len: IPI data length
*/
static int scp_logger_wakeup_handler(unsigned int id, void *prdata, void *data,
unsigned int len)
{
pr_debug("[SCP]wakeup by SCP logger\n");
return 0;
}
/*
* get log from scp to last_log_buf
* @param len: data length
* @return: length of log
*/
static size_t scp_A_get_last_log(size_t b_len)
{
size_t ret = 0;
int scp_awake_flag;
unsigned int log_end_idx;
unsigned int update_start_idx;
unsigned char *scp_last_log_buf =
(unsigned char *)(SCP_TCM + last_log_info.scp_log_buf_addr);
/*pr_debug("[SCP] %s\n", __func__);*/
if (!scp_A_logger_inited) {
pr_notice("[SCP] %s(): logger has not been init\n", __func__);
return 0;
}
mutex_lock(&scp_logger_mutex);
/* SCP keep awake */
scp_awake_flag = 0;
if (scp_awake_lock((void *)SCP_A_ID) == -1) {
scp_awake_flag = -1;
pr_debug("[SCP] %s: awake scp fail\n", __func__);
}
/*cofirm last log information is less than tcm size*/
if (last_log_info.scp_log_end_addr > scpreg.total_tcmsize) {
pr_notice("[SCP] %s: last_log_info.scp_log_end_addr %x is over tcm_size %x\n",
__func__, last_log_info.scp_log_end_addr, scpreg.total_tcmsize);
goto exit;
}
if (last_log_info.scp_log_buf_addr + last_log_info.scp_log_buf_maxlen >
scpreg.total_tcmsize) {
pr_debug("[SCP] %s: end of last_log_info.scp_last_log_buf %x is over tcm_size %x\n",
__func__, last_log_info.scp_log_buf_addr + last_log_info.scp_log_buf_maxlen,
scpreg.total_tcmsize);
goto exit;
}
log_end_idx = readl((void __iomem *)(SCP_TCM +
last_log_info.scp_log_end_addr));
if (b_len > last_log_info.scp_log_buf_maxlen) {
pr_debug("[SCP] b_len %zu > scp_log_buf_maxlen %d\n",
b_len, last_log_info.scp_log_buf_maxlen);
b_len = last_log_info.scp_log_buf_maxlen;
}
/* handle sram error */
if (log_end_idx >= last_log_info.scp_log_buf_maxlen)
log_end_idx = 0;
if (log_end_idx >= b_len)
update_start_idx = log_end_idx - b_len;
else
update_start_idx = last_log_info.scp_log_buf_maxlen -
(b_len - log_end_idx) + 1;
/* read log from scp buffer */
ret = 0;
if (scp_A_last_log) {
while ((update_start_idx != log_end_idx) && ret < b_len) {
scp_A_last_log[ret] =
scp_last_log_buf[update_start_idx];
update_start_idx++;
ret++;
if (update_start_idx >=
last_log_info.scp_log_buf_maxlen)
update_start_idx = update_start_idx -
last_log_info.scp_log_buf_maxlen;
scp_A_last_log[ret] = '\0';
}
} else {
/* no buffer, just skip logs*/
update_start_idx = log_end_idx;
}
exit:
/*SCP release awake */
if (scp_awake_flag == 0) {
if (scp_awake_unlock((void *)SCP_A_ID) == -1)
pr_debug("[SCP] %s: awake unlock fail\n", __func__);
}
mutex_unlock(&scp_logger_mutex);
return ret;
}
ssize_t scp_A_log_read(char __user *data, size_t len)
{
unsigned int w_pos, r_pos, datalen;
char *buf;
if (!scp_A_logger_inited)
return 0;
datalen = 0;
mutex_lock(&scp_A_log_mutex);
r_pos = SCP_A_buf_info->r_pos;
w_pos = SCP_A_buf_info->w_pos;
if (r_pos == w_pos)
goto error;
if (r_pos > w_pos)
datalen = DRAM_BUF_LEN - r_pos; /* not wrap */
else
datalen = w_pos - r_pos;
if (datalen > len)
datalen = len;
/*debug for logger pos fail*/
r_pos_debug = r_pos;
log_ctl_debug = SCP_A_log_ctl->buff_ofs;
if (r_pos >= DRAM_BUF_LEN) {
pr_notice("[SCP] %s(): r_pos >= DRAM_BUF_LEN,%x,%x\n",
__func__, r_pos_debug, log_ctl_debug);
datalen = 0;
goto error;
}
buf = ((char *) SCP_A_log_ctl) + SCP_A_log_ctl->buff_ofs + r_pos;
len = datalen;
/*memory copy from log buf*/
if (copy_to_user(data, buf, len))
pr_debug("[SCP]copy to user buf failed..\n");
r_pos += datalen;
if (r_pos >= DRAM_BUF_LEN)
r_pos -= DRAM_BUF_LEN;
SCP_A_buf_info->r_pos = r_pos;
error:
mutex_unlock(&scp_A_log_mutex);
return datalen;
}
unsigned int scp_A_log_poll(void)
{
if (!scp_A_logger_inited)
return 0;
if (SCP_A_buf_info->r_pos != SCP_A_buf_info->w_pos)
return POLLIN | POLLRDNORM;
/*scp_log_timer_add();*/
return 0;
}
static ssize_t scp_A_log_if_read(struct file *file,
char __user *data, size_t len, loff_t *ppos)
{
ssize_t ret;
/*pr_debug("[SCP A] scp_A_log_if_read\n");*/
ret = 0;
/*if (access_ok(VERIFY_WRITE, data, len))*/
ret = scp_A_log_read(data, len);
return ret;
}
static int scp_A_log_if_open(struct inode *inode, struct file *file)
{
/*pr_debug("[SCP A] scp_A_log_if_open\n");*/
return nonseekable_open(inode, file);
}
static unsigned int scp_A_log_if_poll(struct file *file, poll_table *wait)
{
unsigned int ret = 0;
/* pr_debug("[SCP A] scp_A_log_if_poll\n"); */
if (!scp_A_logger_inited)
return 0;
if (!(file->f_mode & FMODE_READ))
return ret;
/*poll_wait(file, &scp_A_logwait, wait);*/
ret = scp_A_log_poll();
return ret;
}
/*
* ipi send to enable scp logger flag
*/
static unsigned int scp_A_log_enable_set(unsigned int enable)
{
int ret;
unsigned int retrytimes;
struct scp_logger_ctrl_msg msg;
if (scp_A_logger_inited) {
/*
*send ipi to invoke scp logger
*/
ret = 0;
enable = (enable) ? SCP_LOGGER_ON : SCP_LOGGER_OFF;
retrytimes = SCP_IPI_RETRY_TIMES;
do {
msg.cmd = SCP_LOGGER_IPI_ENABLE;
msg.u.flag.enable = enable;
ret = mtk_ipi_send(&scp_ipidev, IPI_OUT_LOGGER_CTRL,
0, &msg, sizeof(msg)/MBOX_SLOT_SIZE, 0);
if (ret == IPI_ACTION_DONE)
break;
retrytimes--;
udelay(100);
} while (retrytimes > 0);
/*
*disable/enable logger flag
*/
if ((ret == IPI_ACTION_DONE) && (enable == SCP_LOGGER_ON))
SCP_A_log_ctl->enable = 1;
else if ((ret == IPI_ACTION_DONE) && (enable == SCP_LOGGER_OFF))
SCP_A_log_ctl->enable = 0;
if (ret != IPI_ACTION_DONE) {
pr_notice("[SCP] %s: fail ret=%d\n", __func__, ret);
goto error;
}
}
error:
return 0;
}
/*
*ipi send enable scp logger wake up flag
*/
static unsigned int scp_A_log_wakeup_set(unsigned int enable)
{
int ret;
unsigned int retrytimes;
struct scp_logger_ctrl_msg msg;
if (scp_A_logger_inited) {
/*
*send ipi to invoke scp logger
*/
ret = 0;
enable = (enable) ? 1 : 0;
retrytimes = SCP_IPI_RETRY_TIMES;
do {
msg.cmd = SCP_LOGGER_IPI_WAKEUP;
msg.u.flag.enable = enable;
ret = mtk_ipi_send(&scp_ipidev, IPI_OUT_LOGGER_CTRL,
0, &msg, sizeof(msg)/MBOX_SLOT_SIZE, 0);
if (ret == IPI_ACTION_DONE)
break;
retrytimes--;
udelay(100);
} while (retrytimes > 0);
/*
*disable/enable logger flag
*/
if ((ret == IPI_ACTION_DONE) && (enable == 1))
scp_A_logger_wakeup_ap = 1;
else if ((ret == IPI_ACTION_DONE) && (enable == 0))
scp_A_logger_wakeup_ap = 0;
if (ret != IPI_ACTION_DONE) {
pr_notice("[SCP] %s: fail ret=%d\n", __func__, ret);
goto error;
}
}
error:
return 0;
}
/*
* create device sysfs, scp logger status
*/
static ssize_t scp_mobile_log_show(struct device *kobj,
struct device_attribute *attr, char *buf)
{
unsigned int stat;
stat = (scp_A_logger_inited && SCP_A_log_ctl->enable) ? 1 : 0;
return sprintf(buf, "[SCP A] mobile log is %s\n",
(stat == 0x1) ? "enabled" : "disabled");
}
static ssize_t scp_mobile_log_store(struct device *kobj,
struct device_attribute *attr, const char *buf, size_t n)
{
unsigned int enable;
if (kstrtouint(buf, 0, &enable) != 0)
return -EINVAL;
mutex_lock(&scp_A_log_mutex);
scp_A_log_enable_set(enable);
mutex_unlock(&scp_A_log_mutex);
return n;
}
DEVICE_ATTR_RW(scp_mobile_log);
/*
* create device sysfs, scp ADB cmd to set SCP wakeup AP flag
*/
static ssize_t scp_A_logger_wakeup_AP_show(struct device *kobj,
struct device_attribute *attr, char *buf)
{
unsigned int stat;
stat = (scp_A_logger_inited && scp_A_logger_wakeup_ap) ? 1 : 0;
return sprintf(buf, "[SCP A] logger wakeup AP is %s\n",
(stat == 0x1) ? "enabled" : "disabled");
}
static ssize_t scp_A_logger_wakeup_AP_store(struct device *kobj,
struct device_attribute *attr, const char *buf, size_t n)
{
unsigned int enable;
if (kstrtouint(buf, 0, &enable) != 0)
return -EINVAL;
mutex_lock(&scp_A_log_mutex);
scp_A_log_wakeup_set(enable);
mutex_unlock(&scp_A_log_mutex);
return n;
}
DEVICE_ATTR_RW(scp_A_logger_wakeup_AP);
/*
* create device sysfs, scp last log show
*/
static ssize_t scp_A_get_last_log_show(struct device *kobj,
struct device_attribute *attr, char *buf)
{
scp_A_get_last_log(last_log_info.scp_log_buf_maxlen);
return sprintf(buf, "scp_log_buf_maxlen=%u, log=%s\n",
last_log_info.scp_log_buf_maxlen,
scp_A_last_log ? scp_A_last_log : "");
}
DEVICE_ATTR_RO(scp_A_get_last_log);
/*
* logger UT test
*
*/
#if SCP_LOGGER_UT
static ssize_t scp_A_mobile_log_UT_show(struct device *kobj,
struct device_attribute *attr, char *buf)
{
unsigned int w_pos, r_pos, datalen;
char *logger_buf;
size_t len = 1024;
if (!scp_A_logger_inited)
return 0;
datalen = 0;
mutex_lock(&scp_A_log_mutex);
r_pos = SCP_A_buf_info->r_pos;
w_pos = SCP_A_buf_info->w_pos;
if (r_pos == w_pos)
goto error;
if (r_pos > w_pos)
datalen = DRAM_BUF_LEN - r_pos; /* not wrap */
else
datalen = w_pos - r_pos;
if (datalen > len)
datalen = len;
logger_buf = ((char *) SCP_A_log_ctl) +
SCP_A_log_ctl->buff_ofs + r_pos;
len = datalen;
/*memory copy from log buf*/
memcpy_fromio(buf, logger_buf, len);
r_pos += datalen;
if (r_pos >= DRAM_BUF_LEN)
r_pos -= DRAM_BUF_LEN;
SCP_A_buf_info->r_pos = r_pos;
error:
mutex_unlock(&scp_A_log_mutex);
return len;
}
static ssize_t scp_A_mobile_log_UT_store(struct device *kobj,
struct device_attribute *attr, const char *buf, size_t n)
{
unsigned int enable;
if (kstrtouint(buf, 0, &enable) != 0)
return -EINVAL;
mutex_lock(&scp_A_log_mutex);
scp_A_log_enable_set(enable);
mutex_unlock(&scp_A_log_mutex);
return n;
}
DEVICE_ATTR_RW(scp_A_mobile_log_UT);
#endif
static ssize_t log_filter_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
int ret;
uint32_t filter;
struct scp_logger_ctrl_msg msg;
if (sscanf(buf, "0x%08x", &filter) != 1)
return -EINVAL;
msg.cmd = SCP_LOGGER_IPI_SET_FILTER;
msg.u.flag.enable = filter;
ret = mtk_ipi_send(&scp_ipidev, IPI_OUT_LOGGER_CTRL, 0, &msg,
sizeof(msg)/MBOX_SLOT_SIZE, 0);
switch (ret) {
case IPI_ACTION_DONE:
pr_notice("[SCP] Set log filter to 0x%08x\n", filter);
return count;
case IPI_PIN_BUSY:
pr_notice("[SCP] IPI busy. Set log filter failed!\n");
return -EBUSY;
default:
pr_notice("[SCP] IPI error. Set log filter failed!\n");
return -EIO;
}
}
DEVICE_ATTR_WO(log_filter);
/*
* IPI for logger init
*/
static int scp_logger_init_handler(struct SCP_LOG_INFO *log_info)
{
unsigned long flags;
pr_debug("[SCP]scp_get_reserve_mem_phys=%llx\n",
(uint64_t)scp_get_reserve_mem_phys(SCP_A_LOGGER_MEM_ID));
spin_lock_irqsave(&scp_A_log_buf_spinlock, flags);
/* sync scp last log information*/
last_log_info.scp_log_dram_addr = log_info->scp_log_dram_addr;
last_log_info.scp_log_buf_addr = log_info->scp_log_buf_addr;
last_log_info.scp_log_start_addr = log_info->scp_log_start_addr;
last_log_info.scp_log_end_addr = log_info->scp_log_end_addr;
last_log_info.scp_log_buf_maxlen = log_info->scp_log_buf_maxlen;
/*cofirm last log information is less than tcm size*/
if (last_log_info.scp_log_dram_addr > scpreg.total_tcmsize)
pr_notice("[SCP]last_log_info.scp_log_dram_addr %x is over tcm_size %x\n",
last_log_info.scp_log_dram_addr, scpreg.total_tcmsize);
if (last_log_info.scp_log_buf_addr > scpreg.total_tcmsize)
pr_notice("[SCP]last_log_info.scp_log_buf_addr %x is over tcm_size %x\n",
last_log_info.scp_log_buf_addr, scpreg.total_tcmsize);
if (last_log_info.scp_log_start_addr > scpreg.total_tcmsize)
pr_notice("[SCP]last_log_info.scp_log_start_addr %x is over tcm_size %x\n",
last_log_info.scp_log_start_addr, scpreg.total_tcmsize);
if (last_log_info.scp_log_end_addr > scpreg.total_tcmsize)
pr_notice("[SCP]last_log_info.scp_log_end_addr %x is over tcm_size %x\n",
last_log_info.scp_log_end_addr, scpreg.total_tcmsize);
if (last_log_info.scp_log_buf_addr + last_log_info.scp_log_buf_maxlen >
scpreg.total_tcmsize)
pr_notice("[SCP] end of last_log_info.scp_last_log_buf %x is over tcm_size %x\n",
last_log_info.scp_log_buf_addr + last_log_info.scp_log_buf_maxlen,
scpreg.total_tcmsize);
/* setting dram ctrl config to scp*/
/* scp side get wakelock, AP to write info to scp sram*/
mt_reg_sync_writel(scp_get_reserve_mem_phys(SCP_A_LOGGER_MEM_ID),
(SCP_TCM + last_log_info.scp_log_dram_addr));
/* set init flag here*/
scp_A_logger_inited = 1;
spin_unlock_irqrestore(&scp_A_log_buf_spinlock, flags);
/*set a wq to enable scp logger*/
scp_logger_notify_work[SCP_A_ID].id = SCP_A_ID;
#if SCP_LOGGER_ENABLE
scp_schedule_logger_work(&scp_logger_notify_work[SCP_A_ID]);
#endif
return 0;
}
/*
* IPI for logger control
* @param id: IPI id
* @param prdata: callback function parameter
* @param data: IPI data
* @param len: IPI data length
*/
static int scp_logger_ctrl_handler(unsigned int id, void *prdata, void *data,
unsigned int len)
{
struct scp_logger_ctrl_msg msg = *(struct scp_logger_ctrl_msg *)data;
switch (msg.cmd) {
case SCP_LOGGER_IPI_INIT:
scp_logger_init_handler(&msg.u.info);
break;
case SCP_LOGGER_IPI_WAKEUP:
scp_logger_wakeup_handler(id, prdata, &msg.u.flag, len);
break;
default:
break;
}
return 0;
}
/*
* callback function for work struct
* notify apps to start their tasks or generate an exception according to flag
* NOTE: this function may be blocked and should not be called in interrupt
* context
* @param ws: work struct
*/
static void scp_logger_notify_ws(struct work_struct *ws)
{
unsigned int retrytimes;
int ret;
unsigned int scp_ipi_id;
struct scp_logger_ctrl_msg msg;
scp_ipi_id = IPI_OUT_LOGGER_CTRL;
msg.cmd = SCP_LOGGER_IPI_INIT;
msg.u.init.addr = scp_get_reserve_mem_phys(SCP_A_LOGGER_MEM_ID);
msg.u.init.size = scp_get_reserve_mem_size(SCP_A_LOGGER_MEM_ID);
pr_notice("[SCP] %s: id=%u\n", __func__, scp_ipi_id);
/*
*send ipi to invoke scp logger
*/
retrytimes = SCP_IPI_RETRY_TIMES;
do {
ret = mtk_ipi_send(&scp_ipidev, scp_ipi_id, 0, &msg,
sizeof(msg)/MBOX_SLOT_SIZE, 0);
if ((retrytimes % 500) == 0)
pr_debug("[SCP] %s: ipi ret=%d\n", __func__, ret);
if (ret == IPI_ACTION_DONE)
break;
retrytimes--;
udelay(2000);
} while (retrytimes > 0);
/*enable logger flag*/
if (ret == IPI_ACTION_DONE)
SCP_A_log_ctl->enable = 1;
else {
/*scp logger ipi init fail but still let logger dump*/
SCP_A_log_ctl->enable = 1;
pr_notice("[SCP]logger initial fail, ipi ret=%d\n", ret);
}
}
static int scp_logger_notify_callback(struct notifier_block *this,
unsigned long event, void *ptr)
{
switch (event) {
case SCP_EVENT_READY:
#if SCP_LOGGER_ENABLE
scp_schedule_logger_work(&scp_logger_notify_work[SCP_A_ID]);
#endif
break;
}
return NOTIFY_DONE;
}
static struct notifier_block scp_logger_notify = {
.notifier_call = scp_logger_notify_callback,
};
/******************************************************************************
* init scp logger dram ctrl structure
* @return: -1: fail, otherwise: end of buffer
*****************************************************************************/
int scp_logger_init(phys_addr_t start, phys_addr_t limit)
{
int last_ofs;
/*init wait queue*/
init_waitqueue_head(&scp_A_logwait);
scp_A_logger_wakeup_ap = 0;
mutex_init(&scp_logger_mutex);
/*init work queue*/
INIT_WORK(&scp_logger_notify_work[SCP_A_ID].work, scp_logger_notify_ws);
/*init dram ctrl table*/
last_ofs = 0;
#ifdef CONFIG_ARM64
SCP_A_log_ctl = (struct log_ctrl_s *) start;
#else
/* plz fix origial ptr to phys_addr flow */
SCP_A_log_ctl = (struct log_ctrl_s *) (u32) start;
#endif
SCP_A_log_ctl->base = PLT_LOG_ENABLE; /* magic */
SCP_A_log_ctl->enable = 0;
SCP_A_log_ctl->size = sizeof(*SCP_A_log_ctl);
last_ofs += SCP_A_log_ctl->size;
SCP_A_log_ctl->info_ofs = last_ofs;
last_ofs += sizeof(*SCP_A_buf_info);
last_ofs = ROUNDUP(last_ofs, 4);
SCP_A_log_ctl->buff_ofs = last_ofs;
SCP_A_log_ctl->buff_size = DRAM_BUF_LEN;
SCP_A_buf_info = (struct buffer_info_s *)
(((unsigned char *) SCP_A_log_ctl) + SCP_A_log_ctl->info_ofs);
SCP_A_buf_info->r_pos = 0;
SCP_A_buf_info->w_pos = 0;
last_ofs += SCP_A_log_ctl->buff_size;
if (last_ofs >= limit) {
pr_notice("[SCP]:%s() initial fail, last_ofs=%u, limit=%u\n",
__func__, last_ofs, (unsigned int) limit);
goto error;
}
/* init last log buffer*/
last_log_info.scp_log_buf_maxlen = LAST_LOG_BUF_SIZE;
if (!scp_A_last_log) {
/* Allocate one more byte for the NULL character. */
scp_A_last_log = vmalloc(last_log_info.scp_log_buf_maxlen + 1);
}
/* register logger ctrl IPI */
mtk_ipi_register(&scp_ipidev, IPI_IN_LOGGER_CTRL,
(void *)scp_logger_ctrl_handler, NULL,
&msg_scp_logger_ctrl);
scp_A_register_notify(&scp_logger_notify);
scp_A_logger_inited = 1;
return last_ofs;
error:
scp_A_logger_inited = 0;
SCP_A_log_ctl = NULL;
SCP_A_buf_info = NULL;
return -1;
}
void scp_logger_uninit(void)
{
char *tmp = scp_A_last_log;
scp_A_logger_inited = 0;
scp_A_last_log = NULL;
if (tmp)
vfree(tmp);
}
const struct file_operations scp_A_log_file_ops = {
.owner = THIS_MODULE,
.read = scp_A_log_if_read,
.open = scp_A_log_if_open,
.poll = scp_A_log_if_poll,
};
/*
* move scp last log from sram to dram
* NOTE: this function may be blocked
* @param scp_core_id: fill scp id to get last log
*/
void scp_crash_log_move_to_buf(enum scp_core_id scp_id)
{
int pos;
unsigned int ret;
unsigned int length;
unsigned int log_buf_idx; /* SCP log buf pointer */
unsigned int log_start_idx; /* SCP log start pointer */
unsigned int log_end_idx; /* SCP log end pointer */
unsigned int w_pos; /* buf write pointer */
char *dram_logger_limit = /* SCP log reserve limitation */
(char *)(scp_get_reserve_mem_virt(SCP_A_LOGGER_MEM_ID)
+ scp_get_reserve_mem_size(SCP_A_LOGGER_MEM_ID));
char *pre_scp_logger_buf = NULL;
char *dram_logger_buf; /* dram buffer */
int scp_awake_flag;
char *crash_message = "****SCP EE LOG DUMP****\n";
unsigned char *scp_logger_buf = (unsigned char *)(SCP_TCM +
last_log_info.scp_log_buf_addr);
if (!scp_A_logger_inited && scp_id == SCP_A_ID) {
pr_notice("[SCP] %s(): logger has not been init\n", __func__);
return;
}
mutex_lock(&scp_logger_mutex);
/* SCP keep awake */
scp_awake_flag = 0;
if (scp_awake_lock((void *)scp_id) == -1) {
scp_awake_flag = -1;
pr_debug("[SCP] %s: awake scp fail\n", __func__);
}
/*cofirm last log information is less than tcm size*/
if (last_log_info.scp_log_buf_addr > scpreg.total_tcmsize) {
pr_notice("[SCP] %s: last_log_info.scp_log_buf_addr %x is over tcm_size %x\n",
__func__, last_log_info.scp_log_buf_addr, scpreg.total_tcmsize);
goto exit;
}
if (last_log_info.scp_log_start_addr > scpreg.total_tcmsize) {
pr_notice("[SCP] %s: last_log_info.scp_log_start_addr %x is over tcm_size %x\n",
__func__, last_log_info.scp_log_start_addr, scpreg.total_tcmsize);
goto exit;
}
if (last_log_info.scp_log_end_addr > scpreg.total_tcmsize) {
pr_notice("[SCP] %s: last_log_info.scp_log_end_addr %x is over tcm_size %x\n",
__func__, last_log_info.scp_log_end_addr, scpreg.total_tcmsize);
goto exit;
}
if (last_log_info.scp_log_buf_addr + last_log_info.scp_log_buf_maxlen >
scpreg.total_tcmsize) {
pr_debug("[SCP] %s: end of last_log_info.scp_last_log_buf %x is over tcm_size %x\n",
__func__, last_log_info.scp_log_buf_addr + last_log_info.scp_log_buf_maxlen,
scpreg.total_tcmsize);
goto exit;
}
log_buf_idx = readl((void __iomem *)(SCP_TCM +
last_log_info.scp_log_buf_addr));
log_start_idx = readl((void __iomem *)(SCP_TCM +
last_log_info.scp_log_start_addr));
log_end_idx = readl((void __iomem *)(SCP_TCM +
last_log_info.scp_log_end_addr));
/* if loggger_r/w_pos was messed up, dump all message in logger_buf */
if (((log_start_idx < log_buf_idx + last_log_info.scp_log_buf_maxlen)
|| (log_start_idx >= log_buf_idx))
&& ((log_end_idx < log_buf_idx + last_log_info.scp_log_buf_maxlen)
|| (log_end_idx >= log_buf_idx))) {
if (log_end_idx >= log_start_idx)
length = log_end_idx - log_start_idx;
else
length = last_log_info.scp_log_buf_maxlen -
(log_start_idx - log_end_idx);
} else {
length = last_log_info.scp_log_buf_maxlen;
log_start_idx = log_buf_idx;
log_end_idx = log_buf_idx + length - 1;
}
if (length >= last_log_info.scp_log_buf_maxlen) {
pr_notice("[SCP] %s: length >= max\n", __func__);
length = last_log_info.scp_log_buf_maxlen;
}
pre_scp_logger_buf = scp_last_logger;
scp_last_logger = vmalloc(length + strlen(crash_message) + 1);
if (log_start_idx > last_log_info.scp_log_buf_maxlen) {
pr_debug("[SCP] %s: scp_logger_buf +log_start_idx %x is over tcm_size %x\n",
__func__, last_log_info.scp_log_buf_addr + log_start_idx,
scpreg.total_tcmsize);
goto exit;
}
/* read log from scp buffer */
ret = 0;
if (scp_last_logger) {
ret += snprintf(scp_last_logger, strlen(crash_message),
crash_message);
ret--;
while ((log_start_idx != log_end_idx) &&
ret <= (length + strlen(crash_message))) {
scp_last_logger[ret] = scp_logger_buf[log_start_idx];
log_start_idx++;
ret++;
if (log_start_idx >= last_log_info.scp_log_buf_maxlen)
log_start_idx = log_start_idx -
last_log_info.scp_log_buf_maxlen;
scp_last_logger[ret] = '\0';
}
} else {
/* no buffer, just skip logs */
log_start_idx = log_end_idx;
}
if (ret != 0) {
/* get buffer w pos */
w_pos = SCP_A_buf_info->w_pos;
if (w_pos >= DRAM_BUF_LEN) {
pr_notice("[SCP] %s(): w_pos >= DRAM_BUF_LEN, w_pos=%u",
__func__, w_pos);
return;
}
/* copy to dram buffer */
dram_logger_buf = ((char *) SCP_A_log_ctl) +
SCP_A_log_ctl->buff_ofs + w_pos;
/* check write address don't over logger reserve memory */
if (dram_logger_buf > dram_logger_limit) {
pr_debug("[SCP] %s: dram_logger_buf %x oversize reserve mem %x\n",
__func__, dram_logger_buf, dram_logger_limit);
goto exit;
}
/* memory copy from log buf */
pos = 0;
while ((pos != ret) && pos <= ret) {
*dram_logger_buf = scp_last_logger[pos];
pos++;
w_pos++;
dram_logger_buf++;
if (w_pos >= DRAM_BUF_LEN) {
/* warp */
pr_notice("[SCP] %s: dram warp\n", __func__);
w_pos = 0;
dram_logger_buf = ((char *) SCP_A_log_ctl) +
SCP_A_log_ctl->buff_ofs;
}
}
/* update write pointer */
SCP_A_buf_info->w_pos = w_pos;
}
exit:
/* SCP release awake */
if (scp_awake_flag == 0) {
if (scp_awake_unlock((void *)scp_id) == -1)
pr_debug("[SCP] %s: awake unlock fail\n", __func__);
}
mutex_unlock(&scp_logger_mutex);
if (pre_scp_logger_buf != NULL)
vfree(pre_scp_logger_buf);
}
/*
* get log from scp and optionally save it
* NOTE: this function may be blocked
* @param scp_core_id: fill scp id to get last log
*/
void scp_get_log(enum scp_core_id scp_id)
{
pr_debug("[SCP] %s\n", __func__);
#if SCP_LOGGER_ENABLE
scp_A_get_last_log(last_log_info.scp_log_buf_maxlen);
/*move last log to dram*/
scp_crash_log_move_to_buf(scp_id);
#endif
}
/*
* return useful log for aee issue dispatch
*/
#define CMP_SAFT_RANGE 176
#define DEFAULT_IDX (last_log_info.scp_log_buf_maxlen/3)
char *scp_pickup_log_for_aee(void)
{
char *last_log;
int i;
char keyword1[] = "coredump";
char keyword2[] = "exception";
if (scp_A_last_log == NULL)
return NULL;
last_log = &scp_A_last_log[DEFAULT_IDX]; /* default value */
for (i = last_log_info.scp_log_buf_maxlen; i >= CMP_SAFT_RANGE; i--) {
if (scp_A_last_log[i-0] != keyword1[7])
continue;
if (scp_A_last_log[i-1] != keyword1[6])
continue;
if (scp_A_last_log[i-2] != keyword1[5])
continue;
if (scp_A_last_log[i-3] != keyword1[4])
continue;
if (scp_A_last_log[i-4] != keyword1[3])
continue;
if (scp_A_last_log[i-5] != keyword1[2])
continue;
if (scp_A_last_log[i-6] != keyword1[1])
continue;
if (scp_A_last_log[i-7] != keyword1[0])
continue;
last_log = &scp_A_last_log[i-CMP_SAFT_RANGE];
return last_log;
}
for (i = last_log_info.scp_log_buf_maxlen; i >= CMP_SAFT_RANGE; i--) {
if (scp_A_last_log[i-0] != keyword2[8])
continue;
if (scp_A_last_log[i-1] != keyword2[7])
continue;
if (scp_A_last_log[i-2] != keyword2[6])
continue;
if (scp_A_last_log[i-3] != keyword2[5])
continue;
if (scp_A_last_log[i-4] != keyword2[4])
continue;
if (scp_A_last_log[i-5] != keyword2[3])
continue;
if (scp_A_last_log[i-6] != keyword2[2])
continue;
if (scp_A_last_log[i-7] != keyword2[1])
continue;
if (scp_A_last_log[i-8] != keyword2[0])
continue;
last_log = &scp_A_last_log[i-CMP_SAFT_RANGE];
return last_log;
}
return last_log;
}
/*
* set scp_A_logger_inited
*/
void scp_logger_init_set(unsigned int value)
{
/*scp_A_logger_inited
* 0: logger not init
* 1: logger inited
*/
scp_A_logger_inited = value;
}
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