M7350/kernel/drivers/soc/qcom/smd_debug.c
2024-09-09 08:57:42 +00:00

430 lines
11 KiB
C

/* drivers/soc/qcom/smd_debug.c
*
* Copyright (C) 2007 Google, Inc.
* Copyright (c) 2009-2015, The Linux Foundation. All rights reserved.
* Author: Brian Swetland <swetland@google.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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/debugfs.h>
#include <linux/list.h>
#include <linux/ctype.h>
#include <linux/jiffies.h>
#include <linux/err.h>
#include <soc/qcom/smem.h>
#include "smd_private.h"
#if defined(CONFIG_DEBUG_FS)
static char *chstate(unsigned n)
{
switch (n) {
case SMD_SS_CLOSED:
return "CLOSED";
case SMD_SS_OPENING:
return "OPENING";
case SMD_SS_OPENED:
return "OPENED";
case SMD_SS_FLUSHING:
return "FLUSHING";
case SMD_SS_CLOSING:
return "CLOSING";
case SMD_SS_RESET:
return "RESET";
case SMD_SS_RESET_OPENING:
return "ROPENING";
default:
return "UNKNOWN";
}
}
static void debug_int_stats(struct seq_file *s)
{
int subsys;
struct interrupt_stat *stats = interrupt_stats;
const char *subsys_name;
seq_puts(s,
" Subsystem | Interrupt ID | In | Out |\n");
for (subsys = 0; subsys < NUM_SMD_SUBSYSTEMS; ++subsys) {
subsys_name = smd_pid_to_subsystem(subsys);
if (!IS_ERR_OR_NULL(subsys_name)) {
seq_printf(s, "%-10s %4s | %9d | %9u | %9u |\n",
smd_pid_to_subsystem(subsys), "smd",
stats->smd_interrupt_id,
stats->smd_in_count,
stats->smd_out_count);
seq_printf(s, "%-10s %4s | %9d | %9u | %9u |\n",
smd_pid_to_subsystem(subsys), "smsm",
stats->smsm_interrupt_id,
stats->smsm_in_count,
stats->smsm_out_count);
}
++stats;
}
}
static void debug_int_stats_reset(struct seq_file *s)
{
int subsys;
struct interrupt_stat *stats = interrupt_stats;
seq_puts(s, "Resetting interrupt stats.\n");
for (subsys = 0; subsys < NUM_SMD_SUBSYSTEMS; ++subsys) {
stats->smd_in_count = 0;
stats->smd_out_count = 0;
stats->smsm_in_count = 0;
stats->smsm_out_count = 0;
++stats;
}
}
/* NNV: revist, it may not be smd version */
static void debug_read_smd_version(struct seq_file *s)
{
uint32_t *smd_ver;
uint32_t n, version;
smd_ver = smem_find(SMEM_VERSION_SMD, 32 * sizeof(uint32_t),
0, SMEM_ANY_HOST_FLAG);
if (smd_ver)
for (n = 0; n < 32; n++) {
version = smd_ver[n];
seq_printf(s, "entry %d: %d.%d\n", n,
version >> 16,
version & 0xffff);
}
}
/**
* pid_to_str - Convert a numeric processor id value into a human readable
* string value.
*
* @pid: the processor id to convert
* @returns: a string representation of @pid
*/
static char *pid_to_str(int pid)
{
switch (pid) {
case SMD_APPS:
return "APPS";
case SMD_MODEM:
return "MDMSW";
case SMD_Q6:
return "ADSP";
case SMD_TZ:
return "TZ";
case SMD_WCNSS:
return "WCNSS";
case SMD_MODEM_Q6_FW:
return "MDMFW";
case SMD_RPM:
return "RPM";
default:
return "???";
}
}
/**
* print_half_ch_state - Print the state of half of a SMD channel in a human
* readable format.
*
* @s: the sequential file to print to
* @half_ch: half of a SMD channel that should have its state printed
* @half_ch_funcs: the relevant channel access functions for @half_ch
* @size: size of the fifo in bytes associated with @half_ch
* @proc: the processor id that owns the part of the SMD channel associated with
* @half_ch
* @is_restricted: true if memory access is restricted
*/
static void print_half_ch_state(struct seq_file *s,
void *half_ch,
struct smd_half_channel_access *half_ch_funcs,
unsigned size,
int proc,
bool is_restricted)
{
seq_printf(s, "%-5s|", pid_to_str(proc));
if (!is_restricted) {
seq_printf(s, "%-7s|0x%05X|0x%05X|0x%05X",
chstate(half_ch_funcs->get_state(half_ch)),
size,
half_ch_funcs->get_tail(half_ch),
half_ch_funcs->get_head(half_ch));
seq_printf(s, "|%c%c%c%c%c%c%c%c|0x%05X",
half_ch_funcs->get_fDSR(half_ch) ? 'D' : 'd',
half_ch_funcs->get_fCTS(half_ch) ? 'C' : 'c',
half_ch_funcs->get_fCD(half_ch) ? 'C' : 'c',
half_ch_funcs->get_fRI(half_ch) ? 'I' : 'i',
half_ch_funcs->get_fHEAD(half_ch) ? 'W' : 'w',
half_ch_funcs->get_fTAIL(half_ch) ? 'R' : 'r',
half_ch_funcs->get_fSTATE(half_ch) ? 'S' : 's',
half_ch_funcs->get_fBLOCKREADINTR(half_ch) ? 'B' : 'b',
(half_ch_funcs->get_head(half_ch) -
half_ch_funcs->get_tail(half_ch)) & (size - 1));
} else {
seq_puts(s, " Access Restricted");
}
}
/**
* smd_xfer_type_to_str - Convert a numeric transfer type value into a human
* readable string value.
*
* @xfer_type: the processor id to convert
* @returns: a string representation of @xfer_type
*/
static char *smd_xfer_type_to_str(uint32_t xfer_type)
{
if (xfer_type == 1)
return "S"; /* streaming type */
else if (xfer_type == 2)
return "P"; /* packet type */
else
return "L"; /* legacy type */
}
/**
* print_smd_ch_table - Print the current state of every valid SMD channel in a
* specific SMD channel allocation table to a human
* readable formatted output.
*
* @s: the sequential file to print to
* @tbl: a valid pointer to the channel allocation table to print from
* @num_tbl_entries: total number of entries in the table referenced by @tbl
* @ch_base_id: the SMEM item id corresponding to the array of channel
* structures for the channels found in @tbl
* @fifo_base_id: the SMEM item id corresponding to the array of channel fifos
* for the channels found in @tbl
* @pid: processor id to use for any SMEM operations
* @flags: flags to use for any SMEM operations
*/
static void print_smd_ch_table(struct seq_file *s,
struct smd_alloc_elm *tbl,
unsigned num_tbl_entries,
unsigned ch_base_id,
unsigned fifo_base_id,
unsigned pid,
unsigned flags)
{
void *half_ch;
unsigned half_ch_size;
uint32_t ch_type;
void *buffer;
unsigned buffer_size;
int n;
bool is_restricted;
/*
* formatted, human readable channel state output, ie:
ID|CHANNEL NAME |T|PROC |STATE |FIFO SZ|RDPTR |WRPTR |FLAGS |DATAPEN
-------------------------------------------------------------------------------
00|DS |S|APPS |CLOSED |0x02000|0x00000|0x00000|dcCiwrsb|0x00000
| | |MDMSW|OPENING|0x02000|0x00000|0x00000|dcCiwrsb|0x00000
-------------------------------------------------------------------------------
*/
seq_printf(s, "%2s|%-19s|%1s|%-5s|%-7s|%-7s|%-7s|%-7s|%-8s|%-7s\n",
"ID",
"CHANNEL NAME",
"T",
"PROC",
"STATE",
"FIFO SZ",
"RDPTR",
"WRPTR",
"FLAGS",
"DATAPEN");
seq_puts(s,
"-------------------------------------------------------------------------------\n");
for (n = 0; n < num_tbl_entries; ++n) {
if (strlen(tbl[n].name) == 0)
continue;
seq_printf(s, "%2u|%-19s|%s|", tbl[n].cid, tbl[n].name,
smd_xfer_type_to_str(SMD_XFER_TYPE(tbl[n].type)));
ch_type = SMD_CHANNEL_TYPE(tbl[n].type);
if (smd_edge_to_remote_pid(ch_type) == SMD_RPM &&
smd_edge_to_local_pid(ch_type) != SMD_APPS)
is_restricted = true;
else
is_restricted = false;
if (is_word_access_ch(ch_type))
half_ch_size =
sizeof(struct smd_half_channel_word_access);
else
half_ch_size = sizeof(struct smd_half_channel);
half_ch = smem_find(ch_base_id + n, 2 * half_ch_size,
pid, flags);
buffer = smem_get_entry(fifo_base_id + n, &buffer_size,
pid, flags);
if (half_ch && buffer)
print_half_ch_state(s,
half_ch,
get_half_ch_funcs(ch_type),
buffer_size / 2,
smd_edge_to_local_pid(ch_type),
is_restricted);
seq_puts(s, "\n");
seq_printf(s, "%2s|%-19s|%1s|", "", "", "");
if (half_ch && buffer)
print_half_ch_state(s,
half_ch + half_ch_size,
get_half_ch_funcs(ch_type),
buffer_size / 2,
smd_edge_to_remote_pid(ch_type),
is_restricted);
seq_puts(s, "\n");
seq_puts(s,
"-------------------------------------------------------------------------------\n");
}
}
/**
* debug_ch - Print the current state of every valid SMD channel in a human
* readable formatted table.
*
* @s: the sequential file to print to
*/
static void debug_ch(struct seq_file *s)
{
struct smd_alloc_elm *tbl;
struct smd_alloc_elm *default_pri_tbl;
struct smd_alloc_elm *default_sec_tbl;
unsigned tbl_size;
int i;
tbl = smem_get_entry(ID_CH_ALLOC_TBL, &tbl_size, 0, SMEM_ANY_HOST_FLAG);
default_pri_tbl = tbl;
if (!tbl) {
seq_puts(s, "Channel allocation table not found\n");
return;
}
if (IS_ERR(tbl) && PTR_ERR(tbl) == -EPROBE_DEFER) {
seq_puts(s, "SMEM is not initialized\n");
return;
}
seq_puts(s, "Primary allocation table:\n");
print_smd_ch_table(s, tbl, tbl_size / sizeof(*tbl), ID_SMD_CHANNELS,
SMEM_SMD_FIFO_BASE_ID,
0,
SMEM_ANY_HOST_FLAG);
tbl = smem_get_entry(SMEM_CHANNEL_ALLOC_TBL_2, &tbl_size, 0,
SMEM_ANY_HOST_FLAG);
default_sec_tbl = tbl;
if (tbl) {
seq_puts(s, "\n\nSecondary allocation table:\n");
print_smd_ch_table(s, tbl, tbl_size / sizeof(*tbl),
SMEM_SMD_BASE_ID_2,
SMEM_SMD_FIFO_BASE_ID_2,
0,
SMEM_ANY_HOST_FLAG);
}
for (i = 1; i < NUM_SMD_SUBSYSTEMS; ++i) {
tbl = smem_get_entry(ID_CH_ALLOC_TBL, &tbl_size, i, 0);
if (tbl && tbl != default_pri_tbl) {
seq_puts(s, "\n\n");
seq_printf(s, "%s <-> %s Primary allocation table:\n",
pid_to_str(SMD_APPS),
pid_to_str(i));
print_smd_ch_table(s, tbl, tbl_size / sizeof(*tbl),
ID_SMD_CHANNELS,
SMEM_SMD_FIFO_BASE_ID,
i,
0);
}
tbl = smem_get_entry(SMEM_CHANNEL_ALLOC_TBL_2, &tbl_size, i, 0);
if (tbl && tbl != default_sec_tbl) {
seq_puts(s, "\n\n");
seq_printf(s, "%s <-> %s Secondary allocation table:\n",
pid_to_str(SMD_APPS),
pid_to_str(i));
print_smd_ch_table(s, tbl, tbl_size / sizeof(*tbl),
SMEM_SMD_BASE_ID_2,
SMEM_SMD_FIFO_BASE_ID_2,
i,
0);
}
}
}
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,
};
static void debug_create(const char *name, umode_t mode,
struct dentry *dent,
void (*show)(struct seq_file *))
{
struct dentry *file;
file = debugfs_create_file(name, mode, dent, show, &debug_ops);
if (!file)
pr_err("%s: unable to create file '%s'\n", __func__, name);
}
static int __init smd_debugfs_init(void)
{
struct dentry *dent;
dent = debugfs_create_dir("smd", 0);
if (IS_ERR(dent))
return PTR_ERR(dent);
debug_create("ch", 0444, dent, debug_ch);
debug_create("version", 0444, dent, debug_read_smd_version);
debug_create("int_stats", 0444, dent, debug_int_stats);
debug_create("int_stats_reset", 0444, dent, debug_int_stats_reset);
return 0;
}
late_initcall(smd_debugfs_init);
#endif