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wifi: rtw89: debugfs: use wiphy_locked_debugfs_{read,write}() if needed

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If a debugfs entry takes driver mutex now, let it uses
wiphy_locked_debugfs_{read,write}() to take both driver mutex and
wiphy lock. Add rwlock option to support this.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250122060310.31976-6-pkshih@realtek.com
This commit is contained in:
Ping-Ke Shih 2025-01-22 14:03:05 +08:00
parent 01fd45d9e1
commit 8fdf78f3cd
1 changed files with 55 additions and 8 deletions
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63
drivers/net/wireless/realtek/rtw89/debug.c
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@ -24,6 +24,8 @@ MODULE_PARM_DESC(debug_mask, "Debugging mask");
#ifdef CONFIG_RTW89_DEBUGFS
struct rtw89_debugfs_priv_opt {
bool rlock:1;
bool wlock:1;
size_t rsize;
};
@ -123,6 +125,19 @@ static u16 rtw89_rate_info_bw_to_mhz(enum rate_info_bw bw)
return 0;
}
static ssize_t rtw89_debugfs_file_read_helper(struct wiphy *wiphy, struct file *file,
char *buf, size_t bufsz, void *data)
{
struct rtw89_debugfs_priv *debugfs_priv = data;
struct rtw89_dev *rtwdev = debugfs_priv->rtwdev;
ssize_t n;
n = debugfs_priv->cb_read(rtwdev, debugfs_priv, buf, bufsz);
rtw89_might_trailing_ellipsis(buf, bufsz, n);
return n;
}
static ssize_t rtw89_debugfs_file_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
@ -145,26 +160,55 @@ static ssize_t rtw89_debugfs_file_read(struct file *file, char __user *userbuf,
goto out;
}
n = debugfs_priv->cb_read(rtwdev, debugfs_priv, buf, bufsz);
rtw89_might_trailing_ellipsis(buf, bufsz, n);
if (opt->rlock) {
n = wiphy_locked_debugfs_read(rtwdev->hw->wiphy, file, buf, bufsz,
userbuf, count, ppos,
rtw89_debugfs_file_read_helper,
debugfs_priv);
debugfs_priv->rused = n;
return n;
}
n = rtw89_debugfs_file_read_helper(rtwdev->hw->wiphy, file, buf, bufsz,
debugfs_priv);
debugfs_priv->rused = n;
out:
return simple_read_from_buffer(userbuf, count, ppos, buf, n);
}
static ssize_t rtw89_debugfs_file_write_helper(struct wiphy *wiphy, struct file *file,
char *buf, size_t count, void *data)
{
struct rtw89_debugfs_priv *debugfs_priv = data;
struct rtw89_dev *rtwdev = debugfs_priv->rtwdev;
return debugfs_priv->cb_write(rtwdev, debugfs_priv, buf, count);
}
static ssize_t rtw89_debugfs_file_write(struct file *file,
const char __user *userbuf,
size_t count, loff_t *loff)
{
struct rtw89_debugfs_priv *debugfs_priv = file->private_data;
struct rtw89_debugfs_priv_opt *opt = &debugfs_priv->opt;
struct rtw89_dev *rtwdev = debugfs_priv->rtwdev;
char *buf __free(kfree) = kmalloc(count + 1, GFP_KERNEL);
ssize_t n;
if (!buf)
return -ENOMEM;
if (opt->wlock) {
n = wiphy_locked_debugfs_write(rtwdev->hw->wiphy,
file, buf, count + 1,
userbuf, count,
rtw89_debugfs_file_write_helper,
debugfs_priv);
return n;
}
if (copy_from_user(buf, userbuf, count))
return -EFAULT;
@ -4206,6 +4250,9 @@ rtw89_debug_priv_disable_dm_set(struct rtw89_dev *rtwdev,
#define RSIZE_64K .rsize = 0x10000
#define RSIZE_128K .rsize = 0x20000
#define RSIZE_1M .rsize = 0x100000
#define RLOCK .rlock = 1
#define WLOCK .wlock = 1
#define RWLOCK RLOCK, WLOCK
static const struct rtw89_debugfs rtw89_debugfs_templ = {
.read_reg = rtw89_debug_priv_select_and_get(read_reg),
@ -4213,18 +4260,18 @@ static const struct rtw89_debugfs rtw89_debugfs_templ = {
.read_rf = rtw89_debug_priv_select_and_get(read_rf),
.write_rf = rtw89_debug_priv_set(write_rf),
.rf_reg_dump = rtw89_debug_priv_get(rf_reg_dump, RSIZE_8K),
.txpwr_table = rtw89_debug_priv_get(txpwr_table, RSIZE_20K),
.txpwr_table = rtw89_debug_priv_get(txpwr_table, RSIZE_20K, RLOCK),
.mac_reg_dump = rtw89_debug_priv_select_and_get(mac_reg_dump, RSIZE_128K),
.mac_mem_dump = rtw89_debug_priv_select_and_get(mac_mem_dump, RSIZE_16K),
.mac_mem_dump = rtw89_debug_priv_select_and_get(mac_mem_dump, RSIZE_16K, RLOCK),
.mac_dbg_port_dump = rtw89_debug_priv_select_and_get(mac_dbg_port_dump, RSIZE_1M),
.send_h2c = rtw89_debug_priv_set(send_h2c),
.early_h2c = rtw89_debug_priv_set_and_get(early_h2c),
.fw_crash = rtw89_debug_priv_set_and_get(fw_crash),
.early_h2c = rtw89_debug_priv_set_and_get(early_h2c, RWLOCK),
.fw_crash = rtw89_debug_priv_set_and_get(fw_crash, WLOCK),
.btc_info = rtw89_debug_priv_get(btc_info, RSIZE_12K),
.btc_manual = rtw89_debug_priv_set(btc_manual),
.fw_log_manual = rtw89_debug_priv_set(fw_log_manual),
.fw_log_manual = rtw89_debug_priv_set(fw_log_manual, WLOCK),
.phy_info = rtw89_debug_priv_get(phy_info),
.stations = rtw89_debug_priv_get(stations),
.stations = rtw89_debug_priv_get(stations, RLOCK),
.disable_dm = rtw89_debug_priv_set_and_get(disable_dm),
};