// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation
//
// Author: Liam Girdwood <[email protected]>
//
// Generic debug routines used to export DSP MMIO and memories to userspace
// for firmware debugging.
//
#include <linux/debugfs.h>
#include <linux/io.h>
#include <linux/pm_runtime.h>
#include <sound/sof/ext_manifest.h>
#include <sound/sof/debug.h>
#include "sof-priv.h"
#include "ops.h"
static ssize_t sof_dfsentry_read(struct file *file, char __user *buffer,
size_t count, loff_t *ppos)
{
struct snd_sof_dfsentry *dfse = file->private_data;
struct snd_sof_dev *sdev = dfse->sdev;
loff_t pos = *ppos;
size_t size_ret;
int skip = 0;
int size;
u8 *buf;
size = dfse->size;
/* validate position & count */
if (pos < 0)
return -EINVAL;
if (pos >= size || !count)
return 0;
/* find the minimum. min() is not used since it adds sparse warnings */
if (count > size - pos)
count = size - pos;
/* align io read start to u32 multiple */
pos = ALIGN_DOWN(pos, 4);
/* intermediate buffer size must be u32 multiple */
size = ALIGN(count, 4);
/* if start position is unaligned, read extra u32 */
if (unlikely(pos != *ppos)) {
skip = *ppos - pos;
if (pos + size + 4 < dfse->size)
size += 4;
}
buf = kzalloc(size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (dfse->type == SOF_DFSENTRY_TYPE_IOMEM) {
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
/*
* If the DSP is active: copy from IO.
* If the DSP is suspended:
* - Copy from IO if the memory is always accessible.
* - Otherwise, copy from cached buffer.
*/
if (pm_runtime_active(sdev->dev) ||
dfse->access_type == SOF_DEBUGFS_ACCESS_ALWAYS) {
memcpy_fromio(buf, dfse->io_mem + pos, size);
} else {
dev_info(sdev->dev,
"Copying cached debugfs data\n");
memcpy(buf, dfse->cache_buf + pos, size);
}
#else
/* if the DSP is in D3 */
if (!pm_runtime_active(sdev->dev) &&
dfse->access_type == SOF_DEBUGFS_ACCESS_D0_ONLY) {
dev_err(sdev->dev,
"error: debugfs entry cannot be read in DSP D3\n");
kfree(buf);
return -EINVAL;
}
memcpy_fromio(buf, dfse->io_mem + pos, size);
#endif
} else {
memcpy(buf, ((u8 *)(dfse->buf) + pos), size);
}
/* copy to userspace */
size_ret = copy_to_user(buffer, buf + skip, count);
kfree(buf);
/* update count & position if copy succeeded */
if (size_ret)
return -EFAULT;
*ppos = pos + count;
return count;
}
static const struct file_operations sof_dfs_fops = {
.open = simple_open,
.read = sof_dfsentry_read,
.llseek = default_llseek,
};
/* create FS entry for debug files that can expose DSP memories, registers */
static int snd_sof_debugfs_io_item(struct snd_sof_dev *sdev,
void __iomem *base, size_t size,
const char *name,
enum sof_debugfs_access_type access_type)
{
struct snd_sof_dfsentry *dfse;
if (!sdev)
return -EINVAL;
dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
if (!dfse)
return -ENOMEM;
dfse->type = SOF_DFSENTRY_TYPE_IOMEM;
dfse->io_mem = base;
dfse->size = size;
dfse->sdev = sdev;
dfse->access_type = access_type;
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
/*
* allocate cache buffer that will be used to save the mem window
* contents prior to suspend
*/
if (access_type == SOF_DEBUGFS_ACCESS_D0_ONLY) {
dfse->cache_buf = devm_kzalloc(sdev->dev, size, GFP_KERNEL);
if (!dfse->cache_buf)
return -ENOMEM;
}
#endif
debugfs_create_file(name, 0444, sdev->debugfs_root, dfse,
&sof_dfs_fops);
/* add to dfsentry list */
list_add(&dfse->list, &sdev->dfsentry_list);
return 0;
}
int snd_sof_debugfs_add_region_item_iomem(struct snd_sof_dev *sdev,
enum snd_sof_fw_blk_type blk_type, u32 offset,
size_t size, const char *name,
enum sof_debugfs_access_type access_type)
{
int bar = snd_sof_dsp_get_bar_index(sdev, blk_type);
if (bar < 0)
return bar;
return snd_sof_debugfs_io_item(sdev, sdev->bar[bar] + offset, size, name,
access_type);
}
EXPORT_SYMBOL_GPL(snd_sof_debugfs_add_region_item_iomem);
/* create FS entry for debug files to expose kernel memory */
int snd_sof_debugfs_buf_item(struct snd_sof_dev *sdev,
void *base, size_t size,
const char *name, mode_t mode)
{
struct snd_sof_dfsentry *dfse;
if (!sdev)
return -EINVAL;
dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
if (!dfse)
return -ENOMEM;
dfse->type = SOF_DFSENTRY_TYPE_BUF;
dfse->buf = base;
dfse->size = size;
dfse->sdev = sdev;
debugfs_create_file(name, mode, sdev->debugfs_root, dfse,
&sof_dfs_fops);
/* add to dfsentry list */
list_add(&dfse->list, &sdev->dfsentry_list);
return 0;
}
EXPORT_SYMBOL_GPL(snd_sof_debugfs_buf_item);
static int memory_info_update(struct snd_sof_dev *sdev, char *buf, size_t buff_size)
{
struct sof_ipc_cmd_hdr msg = {
.size = sizeof(struct sof_ipc_cmd_hdr),
.cmd = SOF_IPC_GLB_DEBUG | SOF_IPC_DEBUG_MEM_USAGE,
};
struct sof_ipc_dbg_mem_usage *reply;
int len;
int ret;
int i;
reply = kmalloc(SOF_IPC_MSG_MAX_SIZE, GFP_KERNEL);
if (!reply)
return -ENOMEM;
ret = pm_runtime_resume_and_get(sdev->dev);
if (ret < 0 && ret != -EACCES) {
dev_err(sdev->dev, "error: enabling device failed: %d\n", ret);
goto error;
}
ret = sof_ipc_tx_message(sdev->ipc, &msg, msg.size, reply, SOF_IPC_MSG_MAX_SIZE);
pm_runtime_mark_last_busy(sdev->dev);
pm_runtime_put_autosuspend(sdev->dev);
if (ret < 0 || reply->rhdr.error < 0) {
ret = min(ret, reply->rhdr.error);
dev_err(sdev->dev, "error: reading memory info failed, %d\n", ret);
goto error;
}
if (struct_size(reply, elems, reply->num_elems) != reply->rhdr.hdr.size) {
dev_err(sdev->dev, "error: invalid memory info ipc struct size, %d\n",
reply->rhdr.hdr.size);
ret = -EINVAL;
goto error;
}
for (i = 0, len = 0; i < reply->num_elems; i++) {
ret = scnprintf(buf + len, buff_size - len, "zone %d.%d used %#8x free %#8x\n",
reply->elems[i].zone, reply->elems[i].id,
reply->elems[i].used, reply->elems[i].free);
if (ret < 0)
goto error;
len += ret;
}
ret = len;
error:
kfree(reply);
return ret;
}
static ssize_t memory_info_read(struct file *file, char __user *to, size_t count, loff_t *ppos)
{
struct snd_sof_dfsentry *dfse = file->private_data;
struct snd_sof_dev *sdev = dfse->sdev;
int data_length;
/* read memory info from FW only once for each file read */
if (!*ppos) {
dfse->buf_data_size = 0;
data_length = memory_info_update(sdev, dfse->buf, dfse->size);
if (data_length < 0)
return data_length;
dfse->buf_data_size = data_length;
}
return simple_read_from_buffer(to, count, ppos, dfse->buf, dfse->buf_data_size);
}
static int memory_info_open(struct inode *inode, struct file *file)
{
struct snd_sof_dfsentry *dfse = inode->i_private;
struct snd_sof_dev *sdev = dfse->sdev;
file->private_data = dfse;
/* allocate buffer memory only in first open run, to save memory when unused */
if (!dfse->buf) {
dfse->buf = devm_kmalloc(sdev->dev, PAGE_SIZE, GFP_KERNEL);
if (!dfse->buf)
return -ENOMEM;
dfse->size = PAGE_SIZE;
}
return 0;
}
static const struct file_operations memory_info_fops = {
.open = memory_info_open,
.read = memory_info_read,
.llseek = default_llseek,
};
int snd_sof_dbg_memory_info_init(struct snd_sof_dev *sdev)
{
struct snd_sof_dfsentry *dfse;
dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
if (!dfse)
return -ENOMEM;
/* don't allocate buffer before first usage, to save memory when unused */
dfse->type = SOF_DFSENTRY_TYPE_BUF;
dfse->sdev = sdev;
debugfs_create_file("memory_info", 0444, sdev->debugfs_root, dfse, &memory_info_fops);
/* add to dfsentry list */
list_add(&dfse->list, &sdev->dfsentry_list);
return 0;
}
EXPORT_SYMBOL_GPL(snd_sof_dbg_memory_info_init);
int snd_sof_dbg_init(struct snd_sof_dev *sdev)
{
const struct snd_sof_dsp_ops *ops = sof_ops(sdev);
struct snd_sof_pdata *plat_data = sdev->pdata;
const struct snd_sof_debugfs_map *map;
struct dentry *fw_profile;
int i;
int err;
/* use "sof" as top level debugFS dir */
sdev->debugfs_root = debugfs_create_dir("sof", NULL);
/* expose firmware/topology prefix/names for test purposes */
fw_profile = debugfs_create_dir("fw_profile", sdev->debugfs_root);
debugfs_create_str("fw_path", 0444, fw_profile,
(char **)&plat_data->fw_filename_prefix);
/* library path is not valid for IPC3 */
if (plat_data->ipc_type != SOF_IPC_TYPE_3) {
/*
* fw_lib_prefix can be NULL if the vendor/platform does not
* support loadable libraries
*/
if (plat_data->fw_lib_prefix) {
debugfs_create_str("fw_lib_path", 0444, fw_profile,
(char **)&plat_data->fw_lib_prefix);
} else {
static char *fw_lib_path;
fw_lib_path = devm_kasprintf(sdev->dev, GFP_KERNEL,
"Not supported");
if (!fw_lib_path)
return -ENOMEM;
debugfs_create_str("fw_lib_path", 0444, fw_profile,
(char **)&fw_lib_path);
}
}
debugfs_create_str("tplg_path", 0444, fw_profile,
(char **)&plat_data->tplg_filename_prefix);
debugfs_create_str("fw_name", 0444, fw_profile,
(char **)&plat_data->fw_filename);
debugfs_create_str("tplg_name", 0444, fw_profile,
(char **)&plat_data->tplg_filename);
debugfs_create_u32("ipc_type", 0444, fw_profile,
(u32 *)&plat_data->ipc_type);
/* init dfsentry list */
INIT_LIST_HEAD(&sdev->dfsentry_list);
/* create debugFS files for platform specific MMIO/DSP memories */
for (i = 0; i < ops->debug_map_count; i++) {
map = &ops->debug_map[i];
err = snd_sof_debugfs_io_item(sdev, sdev->bar[map->bar] +
map->offset, map->size,
map->name, map->access_type);
/* errors are only due to memory allocation, not debugfs */
if (err < 0)
return err;
}
return snd_sof_debugfs_buf_item(sdev, &sdev->fw_state,
sizeof(sdev->fw_state),
"fw_state", 0444);
}
EXPORT_SYMBOL_GPL(snd_sof_dbg_init);
void snd_sof_free_debug(struct snd_sof_dev *sdev)
{
debugfs_remove_recursive(sdev->debugfs_root);
}
EXPORT_SYMBOL_GPL(snd_sof_free_debug);
static const struct soc_fw_state_info {
enum sof_fw_state state;
const char *name;
} fw_state_dbg[] = {
{SOF_FW_BOOT_NOT_STARTED, "SOF_FW_BOOT_NOT_STARTED"},
{SOF_DSPLESS_MODE, "SOF_DSPLESS_MODE"},
{SOF_FW_BOOT_PREPARE, "SOF_FW_BOOT_PREPARE"},
{SOF_FW_BOOT_IN_PROGRESS, "SOF_FW_BOOT_IN_PROGRESS"},
{SOF_FW_BOOT_FAILED, "SOF_FW_BOOT_FAILED"},
{SOF_FW_BOOT_READY_FAILED, "SOF_FW_BOOT_READY_FAILED"},
{SOF_FW_BOOT_READY_OK, "SOF_FW_BOOT_READY_OK"},
{SOF_FW_BOOT_COMPLETE, "SOF_FW_BOOT_COMPLETE"},
{SOF_FW_CRASHED, "SOF_FW_CRASHED"},
};
static void snd_sof_dbg_print_fw_state(struct snd_sof_dev *sdev, const char *level)
{
int i;
for (i = 0; i < ARRAY_SIZE(fw_state_dbg); i++) {
if (sdev->fw_state == fw_state_dbg[i].state) {
dev_printk(level, sdev->dev, "fw_state: %s (%d)\n",
fw_state_dbg[i].name, i);
return;
}
}
dev_printk(level, sdev->dev, "fw_state: UNKNOWN (%d)\n", sdev->fw_state);
}
void snd_sof_dsp_dbg_dump(struct snd_sof_dev *sdev, const char *msg, u32 flags)
{
char *level = (flags & SOF_DBG_DUMP_OPTIONAL) ? KERN_DEBUG : KERN_ERR;
bool print_all = sof_debug_check_flag(SOF_DBG_PRINT_ALL_DUMPS);
if (flags & SOF_DBG_DUMP_OPTIONAL && !print_all)
return;
if (sof_ops(sdev)->dbg_dump && !sdev->dbg_dump_printed) {
dev_printk(level, sdev->dev,
"------------[ DSP dump start ]------------\n");
if (msg)
dev_printk(level, sdev->dev, "%s\n", msg);
snd_sof_dbg_print_fw_state(sdev, level);
sof_ops(sdev)->dbg_dump(sdev, flags);
dev_printk(level, sdev->dev,
"------------[ DSP dump end ]------------\n");
if (!print_all)
sdev->dbg_dump_printed = true;
} else if (msg) {
dev_printk(level, sdev->dev, "%s\n", msg);
}
}
EXPORT_SYMBOL(snd_sof_dsp_dbg_dump);
static void snd_sof_ipc_dump(struct snd_sof_dev *sdev)
{
if (sof_ops(sdev)->ipc_dump && !sdev->ipc_dump_printed) {
dev_err(sdev->dev, "------------[ IPC dump start ]------------\n");
sof_ops(sdev)->ipc_dump(sdev);
dev_err(sdev->dev, "------------[ IPC dump end ]------------\n");
if (!sof_debug_check_flag(SOF_DBG_PRINT_ALL_DUMPS))
sdev->ipc_dump_printed = true;
}
}
void snd_sof_handle_fw_exception(struct snd_sof_dev *sdev, const char *msg)
{
if ((IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_RETAIN_DSP_CONTEXT) ||
sof_debug_check_flag(SOF_DBG_RETAIN_CTX)) && !sdev->d3_prevented) {
/* should we prevent DSP entering D3 ? */
if (!sdev->ipc_dump_printed)
dev_info(sdev->dev,
"Attempting to prevent DSP from entering D3 state to preserve context\n");
if (pm_runtime_get_if_in_use(sdev->dev) == 1)
sdev->d3_prevented = true;
}
/* dump vital information to the logs */
snd_sof_ipc_dump(sdev);
snd_sof_dsp_dbg_dump(sdev, msg, SOF_DBG_DUMP_REGS | SOF_DBG_DUMP_MBOX);
sof_fw_trace_fw_crashed(sdev);
}
EXPORT_SYMBOL(snd_sof_handle_fw_exception);
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