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ASoC: wcd934x: WDSP debug enhancement

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Add interface to trigger WDSP dumps for debug use.
Important register dump and WDSP ramdump are both collected when
DEBUG_DUMP string is sent from userspace via WDSP misc node or
when WDSP boot timeout happens.

CRs-Fixed: 2117755
Change-Id: I8b91a8939201a54512a5e3557ce771b4ff2ff075
Signed-off-by: Walter Yang <yandongy@codeaurora.org>
This commit is contained in:
Walter Yang 2017-11-17 15:47:57 +08:00
parent 05cae9910f
commit 83b0584703
3 changed files with 154 additions and 3 deletions
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42
asoc/codecs/wcd-dsp-mgr.c
View File

@ -838,6 +838,45 @@ static int wdsp_ssr_handler(struct wdsp_mgr_priv *wdsp, void *arg,
return 0;
}
#ifdef CONFIG_DEBUG_FS
static int wdsp_debug_dump_handler(struct wdsp_mgr_priv *wdsp, void *arg)
{
struct wdsp_err_signal_arg *err_data;
int ret = 0;
WDSP_MGR_MUTEX_LOCK(wdsp, wdsp->ssr_mutex);
/* If there is no SSR, set the SSR type to collect ramdumps */
if (wdsp->ssr_type == WDSP_SSR_TYPE_NO_SSR) {
wdsp->ssr_type = WDSP_SSR_TYPE_WDSP_DOWN;
} else {
WDSP_DBG(wdsp, "SSR handling is running, skip debug ramdump");
ret = 0;
WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->ssr_mutex);
goto done;
}
if (arg) {
err_data = (struct wdsp_err_signal_arg *) arg;
memcpy(&wdsp->dump_data.err_data, err_data,
sizeof(*err_data));
} else {
WDSP_DBG(wdsp, "Invalid input, arg is NULL");
ret = -EINVAL;
WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->ssr_mutex);
goto done;
}
wdsp_collect_ramdumps(wdsp);
wdsp->ssr_type = WDSP_SSR_TYPE_NO_SSR;
WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->ssr_mutex);
done:
return ret;
}
#else
static int wdsp_debug_dump_handler(struct wdsp_mgr_priv *wdsp, void *arg)
{
return 0;
}
#endif
static int wdsp_signal_handler(struct device *wdsp_dev,
enum wdsp_signal signal, void *arg)
{
@ -866,6 +905,9 @@ static int wdsp_signal_handler(struct device *wdsp_dev,
case WDSP_CDC_UP_SIGNAL:
ret = wdsp_ssr_handler(wdsp, arg, WDSP_SSR_TYPE_CDC_UP);
break;
case WDSP_DEBUG_DUMP:
ret = wdsp_debug_dump_handler(wdsp, arg);
break;
default:
ret = -EINVAL;
break;

109
asoc/codecs/wcd934x/wcd934x-dsp-cntl.c
View File

@ -31,6 +31,7 @@
#define WCD_PROCFS_ENTRY_MAX_LEN 16
#define WCD_934X_RAMDUMP_START_ADDR 0x20100000
#define WCD_934X_RAMDUMP_SIZE ((1024 * 1024) - 128)
#define WCD_MISCDEV_CMD_MAX_LEN 11
#define WCD_CNTL_MUTEX_LOCK(codec, lock) \
{ \
@ -76,6 +77,95 @@ static u8 mem_enable_values[] = {
0xE0, 0xC0, 0x80, 0x00,
};
#ifdef CONFIG_DEBUG_FS
#define WCD_CNTL_SET_ERR_IRQ_FLAG(cntl)\
atomic_cmpxchg(&cntl->err_irq_flag, 0, 1)
#define WCD_CNTL_CLR_ERR_IRQ_FLAG(cntl)\
atomic_set(&cntl->err_irq_flag, 0)
static u16 wdsp_reg_for_debug_dump[] = {
WCD934X_CPE_SS_CPE_CTL,
WCD934X_CPE_SS_PWR_SYS_PSTATE_CTL_0,
WCD934X_CPE_SS_PWR_SYS_PSTATE_CTL_1,
WCD934X_CPE_SS_PWR_CPEFLL_CTL,
WCD934X_CPE_SS_PWR_CPE_SYSMEM_DEEPSLP_0,
WCD934X_CPE_SS_PWR_CPE_SYSMEM_DEEPSLP_1,
WCD934X_CPE_SS_PWR_CPE_SYSMEM_DEEPSLP_OVERRIDE,
WCD934X_CPE_SS_PWR_CPE_SYSMEM_SHUTDOWN_0,
WCD934X_CPE_SS_PWR_CPE_SYSMEM_SHUTDOWN_1,
WCD934X_CPE_SS_PWR_CPE_SYSMEM_SHUTDOWN_2,
WCD934X_CPE_SS_PWR_CPE_SYSMEM_SHUTDOWN_3,
WCD934X_CPE_SS_PWR_CPE_SYSMEM_SHUTDOWN_4,
WCD934X_CPE_SS_PWR_CPE_SYSMEM_SHUTDOWN_5,
WCD934X_CPE_SS_PWR_CPE_DRAM1_SHUTDOWN,
WCD934X_CPE_SS_SOC_SW_COLLAPSE_CTL,
WCD934X_CPE_SS_MAD_CTL,
WCD934X_CPE_SS_CPAR_CTL,
WCD934X_CPE_SS_WDOG_CFG,
WCD934X_CPE_SS_STATUS,
WCD934X_CPE_SS_SS_ERROR_INT_MASK_0A,
WCD934X_CPE_SS_SS_ERROR_INT_MASK_0B,
WCD934X_CPE_SS_SS_ERROR_INT_MASK_1A,
WCD934X_CPE_SS_SS_ERROR_INT_MASK_1B,
WCD934X_CPE_SS_SS_ERROR_INT_STATUS_0A,
WCD934X_CPE_SS_SS_ERROR_INT_STATUS_0B,
WCD934X_CPE_SS_SS_ERROR_INT_STATUS_1A,
WCD934X_CPE_SS_SS_ERROR_INT_STATUS_1B,
};
static void wcd_cntl_collect_debug_dumps(struct wcd_dsp_cntl *cntl)
{
struct snd_soc_codec *codec = cntl->codec;
struct wdsp_err_signal_arg arg;
int i;
u8 val;
/* If WDSP SSR happens, skip collecting debug dumps */
if (WCD_CNTL_SET_ERR_IRQ_FLAG(cntl) != 0)
return;
/* Mask all error interrupts */
snd_soc_write(codec, WCD934X_CPE_SS_SS_ERROR_INT_MASK_0A,
0xFF);
snd_soc_write(codec, WCD934X_CPE_SS_SS_ERROR_INT_MASK_0B,
0xFF);
/* Collect important WDSP registers dump for debug use */
pr_err("%s: Dump the WDSP registers for debug use\n", __func__);
for (i = 0; i < sizeof(wdsp_reg_for_debug_dump)/sizeof(u16); i++) {
val = snd_soc_read(codec, wdsp_reg_for_debug_dump[i]);
pr_err("%s: reg = 0x%x, val = 0x%x\n", __func__,
wdsp_reg_for_debug_dump[i], val);
}
/* Trigger NMI in WDSP to sync and update the memory */
snd_soc_write(codec, WCD934X_CPE_SS_BACKUP_INT, 0x02);
/* Collect WDSP ramdump for debug use */
if (cntl->m_dev && cntl->m_ops && cntl->m_ops->signal_handler) {
arg.mem_dumps_enabled = cntl->ramdump_enable;
arg.remote_start_addr = WCD_934X_RAMDUMP_START_ADDR;
arg.dump_size = WCD_934X_RAMDUMP_SIZE;
cntl->m_ops->signal_handler(cntl->m_dev, WDSP_DEBUG_DUMP,
&arg);
}
/* Unmask the fatal irqs */
snd_soc_write(codec, WCD934X_CPE_SS_SS_ERROR_INT_MASK_0A,
~(cntl->irqs.fatal_irqs & 0xFF));
snd_soc_write(codec, WCD934X_CPE_SS_SS_ERROR_INT_MASK_0B,
~((cntl->irqs.fatal_irqs >> 8) & 0xFF));
WCD_CNTL_CLR_ERR_IRQ_FLAG(cntl);
}
#else
#define WCD_CNTL_SET_ERR_IRQ_FLAG(cntl) 0
#define WCD_CNTL_CLR_ERR_IRQ_FLAG(cntl) do {} while (0)
static void wcd_cntl_collect_debug_dumps(struct wcd_dsp_cntl *cntl)
{
}
#endif
static ssize_t wdsp_boot_show(struct wcd_dsp_cntl *cntl, char *buf)
{
return snprintf(buf, WCD_SYSFS_ENTRY_MAX_LEN,
@ -663,6 +753,7 @@ static int wcd_cntl_do_boot(struct wcd_dsp_cntl *cntl)
if (!ret) {
dev_err(codec->dev, "%s: WDSP boot timed out\n",
__func__);
wcd_cntl_collect_debug_dumps(cntl);
ret = -ETIMEDOUT;
goto err_boot;
} else {
@ -719,7 +810,7 @@ static irqreturn_t wcd_cntl_err_irq(int irq, void *data)
struct wdsp_err_signal_arg arg;
u16 status = 0;
u8 reg_val;
int ret = 0;
int rc, ret = 0;
reg_val = snd_soc_read(codec, WCD934X_CPE_SS_SS_ERROR_INT_STATUS_0A);
status = status | reg_val;
@ -732,6 +823,12 @@ static irqreturn_t wcd_cntl_err_irq(int irq, void *data)
if ((status & cntl->irqs.fatal_irqs) &&
(cntl->m_dev && cntl->m_ops && cntl->m_ops->signal_handler)) {
/*
* If WDSP SSR happens, skip collecting debug dumps.
* If debug dumps collecting happens first, WDSP_ERR_INTR
* will be blocked in signal_handler and get processed later.
*/
rc = WCD_CNTL_SET_ERR_IRQ_FLAG(cntl);
arg.mem_dumps_enabled = cntl->ramdump_enable;
arg.remote_start_addr = WCD_934X_RAMDUMP_START_ADDR;
arg.dump_size = WCD_934X_RAMDUMP_SIZE;
@ -742,6 +839,8 @@ static irqreturn_t wcd_cntl_err_irq(int irq, void *data)
"%s: Failed to handle fatal irq 0x%x\n",
__func__, status & cntl->irqs.fatal_irqs);
wcd_cntl_change_online_state(cntl, 0);
if (rc == 0)
WCD_CNTL_CLR_ERR_IRQ_FLAG(cntl);
} else {
dev_err(cntl->codec->dev, "%s: Invalid signal_handler\n",
__func__);
@ -912,7 +1011,7 @@ static ssize_t wcd_miscdev_write(struct file *filep, const char __user *ubuf,
bool vote;
int ret = 0;
if (count == 0 || count > 2) {
if (count == 0 || count > WCD_MISCDEV_CMD_MAX_LEN) {
pr_err("%s: Invalid count = %zd\n", __func__, count);
ret = -EINVAL;
goto done;
@ -939,6 +1038,11 @@ static ssize_t wcd_miscdev_write(struct file *filep, const char __user *ubuf,
}
cntl->boot_reqs--;
vote = false;
} else if (!strcmp(val, "DEBUG_DUMP")) {
dev_dbg(cntl->codec->dev,
"%s: Collect dumps for debug use\n", __func__);
wcd_cntl_collect_debug_dumps(cntl);
goto done;
} else {
dev_err(cntl->codec->dev, "%s: Invalid value %s\n",
__func__, val);
@ -1309,6 +1413,7 @@ void wcd_dsp_cntl_init(struct snd_soc_codec *codec,
mutex_init(&control->clk_mutex);
mutex_init(&control->ssr_mutex);
init_waitqueue_head(&control->ssr_entry.offline_poll_wait);
WCD_CNTL_CLR_ERR_IRQ_FLAG(control);
/*
* The default state of WDSP is in SVS mode.

6
asoc/codecs/wcd934x/wcd934x-dsp-cntl.h
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2016, The Linux Foundation. All rights reserved.
* Copyright (c) 2016-2017, 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
@ -109,6 +109,10 @@ struct wcd_dsp_cntl {
/* Misc device related */
char miscdev_name[256];
struct miscdevice miscdev;
#ifdef CONFIG_DEBUG_FS
/* Debug dump related */
atomic_t err_irq_flag;
#endif
};
void wcd_dsp_cntl_init(struct snd_soc_codec *codec,