From: Yan-Hsuan Chuang <yhchuang@xxxxxxxxxxx>
debug files for Realtek 802.11ac wireless network chips
Signed-off-by: Yan-Hsuan Chuang <yhchuang@xxxxxxxxxxx>
---
drivers/net/wireless/realtek/rtw88/debug.c | 631 +++++++++++++++++++++++++++++
drivers/net/wireless/realtek/rtw88/debug.h | 35 ++
2 files changed, 666 insertions(+)
create mode 100644 drivers/net/wireless/realtek/rtw88/debug.c
create mode 100644 drivers/net/wireless/realtek/rtw88/debug.h
diff --git a/drivers/net/wireless/realtek/rtw88/debug.c b/drivers/net/wireless/realtek/rtw88/debug.c
new file mode 100644
index 0000000..d0cb9d3
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/debug.c
@@ -0,0 +1,631 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2018 Realtek Corporation.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include "main.h"
+#include "sec.h"
+#include "fw.h"
+#include "debug.h"
+
+#ifdef CONFIG_RTW88_DEBUGFS
+
+struct rtw_debugfs_priv {
+ struct rtw_dev *rtwdev;
+ int (*cb_read)(struct seq_file *m, void *v);
+ ssize_t (*cb_write)(struct file *filp, const char __user *buffer,
+ size_t count, loff_t *loff);
+ union {
+ u32 cb_data;
+ u8 *buf;
+ struct {
+ u32 page_offset;
+ u32 page_num;
+ } rsvd_page;
+ struct {
+ u8 rf_path;
+ u32 rf_addr;
+ u32 rf_mask;
+ };
+ struct {
+ u32 addr;
+ u32 len;
+ } read_reg;
+ };
+};
+
+static int rtw_debugfs_single_show(struct seq_file *m, void *v)
+{
+ struct rtw_debugfs_priv *debugfs_priv = m->private;
+
+ return debugfs_priv->cb_read(m, v);
+}
+
+static ssize_t rtw_debugfs_common_write(struct file *filp,
+ const char __user *buffer,
+ size_t count, loff_t *loff)
+{
+ struct rtw_debugfs_priv *debugfs_priv = filp->private_data;
+
+ return debugfs_priv->cb_write(filp, buffer, count, loff);
+}
+
+static ssize_t rtw_debugfs_single_write(struct file *filp,
+ const char __user *buffer,
+ size_t count, loff_t *loff)
+{
+ struct seq_file *seqpriv = (struct seq_file *)filp->private_data;
+ struct rtw_debugfs_priv *debugfs_priv = seqpriv->private;
+
+ return debugfs_priv->cb_write(filp, buffer, count, loff);
+}
+
+static int rtw_debugfs_single_open_rw(struct inode *inode, struct file *filp)
+{
+ return single_open(filp, rtw_debugfs_single_show, inode->i_private);
+}
+
+static int rtw_debugfs_close(struct inode *inode, struct file *filp)
+{
+ return 0;
+}
+
+static const struct file_operations file_ops_single_r = {
+ .owner = THIS_MODULE,
+ .open = rtw_debugfs_single_open_rw,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static const struct file_operations file_ops_single_rw = {
+ .owner = THIS_MODULE,
+ .open = rtw_debugfs_single_open_rw,
+ .release = single_release,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .write = rtw_debugfs_single_write,
+};
+
+static const struct file_operations file_ops_common_write = {
+ .owner = THIS_MODULE,
+ .write = rtw_debugfs_common_write,
+ .open = simple_open,
+ .release = rtw_debugfs_close,
+};
+
+static int rtw_debugfs_get_read_reg(struct seq_file *m, void *v)
+{
+ struct rtw_debugfs_priv *debugfs_priv = m->private;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ u32 val, len, addr;
+
+ len = debugfs_priv->read_reg.len;
+ addr = debugfs_priv->read_reg.addr;
+ switch (len) {
+ case 1:
+ val = rtw_read8(rtwdev, addr);
+ seq_printf(m, "reg 0x%03x: 0x%02x\n", addr, val);
+ break;
+ case 2:
+ val = rtw_read16(rtwdev, addr);
+ seq_printf(m, "reg 0x%03x: 0x%04x\n", addr, val);
+ break;
+ case 4:
+ val = rtw_read32(rtwdev, addr);
+ seq_printf(m, "reg 0x%03x: 0x%08x\n", addr, val);
+ break;
+ }
+ return 0;
+}
+
+static int rtw_debugfs_get_rf_read(struct seq_file *m, void *v)
+{
+ struct rtw_debugfs_priv *debugfs_priv = m->private;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ u32 val, addr, mask;
+ u8 path;
+
+ path = debugfs_priv->rf_path;
+ addr = debugfs_priv->rf_addr;
+ mask = debugfs_priv->rf_mask;
+
+ val = rtw_read_rf(rtwdev, path, addr, mask);
+
+ seq_printf(m, "rf_read path:%d addr:0x%08x mask:0x%08x val=0x%08x\n",
+ path, addr, mask, val);
+
+ return 0;
+}
+
+static int rtw_debugfs_copy_from_user(char tmp[], int size,
+ const char __user *buffer, size_t count,
+ int num)
+{
+ int tmp_len;
+
+ if (count < num)
+ return -EFAULT;
+
+ tmp_len = (count > size - 1 ? size - 1 : count);
+
+ if (!buffer || copy_from_user(tmp, buffer, tmp_len))
+ return count;
+
+ tmp[tmp_len] = '\0';
+
+ return 0;
+}
+
+static ssize_t rtw_debugfs_set_read_reg(struct file *filp,
+ const char __user *buffer,
+ size_t count, loff_t *loff)
+{
+ struct seq_file *seqpriv = (struct seq_file *)filp->private_data;
+ struct rtw_debugfs_priv *debugfs_priv = seqpriv->private;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ char tmp[32 + 1];
+ u32 addr, len;
+ int num;
+
+ rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 2);
+
+ num = sscanf(tmp, "%x %x", &addr, &len);
+
+ if (num != 2)
+ return count;
+
+ if (len != 1 && len != 2 && len != 4) {
+ rtw_warn(rtwdev, "read reg setting wrong len\n");
+ return -EINVAL;
+ }
+ debugfs_priv->read_reg.addr = addr;
+ debugfs_priv->read_reg.len = len;
+
+ return count;
+}
+
+static int rtw_debugfs_get_dump_cam(struct seq_file *m, void *v)
+{
+ struct rtw_debugfs_priv *debugfs_priv = m->private;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ u32 val, command;
+ u32 hw_key_idx = debugfs_priv->cb_data << RTW_SEC_CAM_ENTRY_SHIFT;
+ u32 read_cmd = RTW_SEC_CMD_POLLING;
+ int i;
+
+ seq_printf(m, "cam entry%d\n", debugfs_priv->cb_data);
+ seq_puts(m, "0x0 0x1 0x2 0x3 ");
+ seq_puts(m, "0x4 0x5\n");
+ mutex_lock(&rtwdev->mutex);
+ for (i = 0; i <= 5; i++) {
+ command = read_cmd | (hw_key_idx + i);
+ rtw_write32(rtwdev, RTW_SEC_CMD_REG, command);
+ val = rtw_read32(rtwdev, RTW_SEC_READ_REG);
+ seq_printf(m, "%8.8x", val);
+ if (i < 2)
+ seq_puts(m, " ");
+ }
+ seq_puts(m, "\n");
+ mutex_unlock(&rtwdev->mutex);
+ return 0;
+}
+
+static int rtw_debugfs_get_rsvd_page(struct seq_file *m, void *v)
+{
+ struct rtw_debugfs_priv *debugfs_priv = m->private;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ u8 page_size = rtwdev->chip->page_size;
+ u32 buf_size = debugfs_priv->rsvd_page.page_num * page_size;
+ u32 offset = debugfs_priv->rsvd_page.page_offset * page_size;
+ u8 *buf;
+ int i;
+ int ret;
+
+ buf = vzalloc(buf_size);
+ if (!buf)
+ return -ENOMEM;
+
+ ret = rtw_dump_drv_rsvd_page(rtwdev, offset, buf_size, (u32 *)buf);
+ if (ret) {
+ rtw_err(rtwdev, "failed to dump rsvd page\n");
+ vfree(buf);
+ return ret;
+ }
+
+ for (i = 0 ; i < buf_size ; i += 8) {
+ if (i % page_size == 0)
+ seq_printf(m, "PAGE %d\n", (i + offset) / page_size);
+ seq_printf(m, "%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
+ *(buf + i), *(buf + i + 1),
+ *(buf + i + 2), *(buf + i + 3),
+ *(buf + i + 4), *(buf + i + 5),
+ *(buf + i + 6), *(buf + i + 7));
+ }
+ vfree(buf);
+
+ return 0;
+}
+
+static ssize_t rtw_debugfs_set_rsvd_page(struct file *filp,
+ const char __user *buffer,
+ size_t count, loff_t *loff)
+{
+ struct seq_file *seqpriv = (struct seq_file *)filp->private_data;
+ struct rtw_debugfs_priv *debugfs_priv = seqpriv->private;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ char tmp[32 + 1];
+ u32 offset, page_num;
+ int num;
+
+ rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 2);
+
+ num = sscanf(tmp, "%d %d", &offset, &page_num);
+
+ if (num != 2) {
+ rtw_warn(rtwdev, "invalid arguments\n");
+ return num;
+ }
+
+ debugfs_priv->rsvd_page.page_offset = offset;
+ debugfs_priv->rsvd_page.page_num = page_num;
+
+ return count;
+}
+
+static ssize_t rtw_debugfs_set_single_input(struct file *filp,
+ const char __user *buffer,
+ size_t count, loff_t *loff)
+{
+ struct seq_file *seqpriv = (struct seq_file *)filp->private_data;
+ struct rtw_debugfs_priv *debugfs_priv = seqpriv->private;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ char tmp[32 + 1];
+ u32 input;
+ int num;
+
+ rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 1);
+
+ num = kstrtoint(tmp, 0, &input);
+
+ if (num) {
+ rtw_warn(rtwdev, "kstrtoint failed\n");
+ return num;
+ }
+
+ debugfs_priv->cb_data = input;
+
+ return count;
+}
+
+static ssize_t rtw_debugfs_set_write_reg(struct file *filp,
+ const char __user *buffer,
+ size_t count, loff_t *loff)
+{
+ struct rtw_debugfs_priv *debugfs_priv = filp->private_data;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ char tmp[32 + 1];
+ u32 addr, val, len;
+ int num;
+
+ rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 3);
+
+ /* write BB/MAC register */
+ num = sscanf(tmp, "%x %x %x", &addr, &val, &len);
+
+ if (num != 3)
+ return count;
+
+ switch (len) {
+ case 1:
+ rtw_dbg(rtwdev, "reg write8 0x%03x: 0x%08x\n", addr, val);
+ rtw_write8(rtwdev, addr, (u8)val);
+ break;
+ case 2:
+ rtw_dbg(rtwdev, "reg write16 0x%03x: 0x%08x\n", addr, val);
+ rtw_write16(rtwdev, addr, (u16)val);
+ break;
+ case 4:
+ rtw_dbg(rtwdev, "reg write32 0x%03x: 0x%08x\n", addr, val);
+ rtw_write32(rtwdev, addr, (u32)val);
+ break;
+ default:
+ rtw_dbg(rtwdev, "error write length = %d\n", len);
+ break;
+ }
+
+ return count;
+}
+
+static ssize_t rtw_debugfs_set_rf_write(struct file *filp,
+ const char __user *buffer,
+ size_t count, loff_t *loff)
+{
+ struct rtw_debugfs_priv *debugfs_priv = filp->private_data;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ char tmp[32 + 1];
+ u32 path, addr, mask, val;
+ int num;
+
+ rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 4);
+
+ num = sscanf(tmp, "%x %x %x %x", &path, &addr, &mask, &val);
+
+ if (num != 4) {
+ rtw_warn(rtwdev, "invalid args, [path] [addr] [mask] [val]\n");
+ return count;
+ }
+
+ rtw_write_rf(rtwdev, path, addr, mask, val);
+ rtw_dbg(rtwdev, "write_rf path:%d addr:0x%08x mask:0x%08x, val:0x%08x\n",
+ path, addr, mask, val);
+
+ return count;
+}
+
+static ssize_t rtw_debugfs_set_rf_read(struct file *filp,
+ const char __user *buffer,
+ size_t count, loff_t *loff)
+{
+ struct seq_file *seqpriv = (struct seq_file *)filp->private_data;
+ struct rtw_debugfs_priv *debugfs_priv = seqpriv->private;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ char tmp[32 + 1];
+ u32 path, addr, mask;
+ int num;
+
+ rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 3);
+
+ num = sscanf(tmp, "%x %x %x", &path, &addr, &mask);
+
+ if (num != 3) {
+ rtw_warn(rtwdev, "invalid args, [path] [addr] [mask] [val]\n");
+ return count;
+ }
+
+ debugfs_priv->rf_path = path;
+ debugfs_priv->rf_addr = addr;
+ debugfs_priv->rf_mask = mask;
+
+ return count;
+}
+
+static int rtw_debug_get_mac_page(struct seq_file *m, void *v)
+{
+ struct rtw_debugfs_priv *debugfs_priv = m->private;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ u32 val;
+ u32 page = debugfs_priv->cb_data;
+ int i, n;
+ int max = 0xff;
+
+ val = rtw_read32(rtwdev, debugfs_priv->cb_data);
+ for (n = 0; n <= max; ) {
+ seq_printf(m, "\n%8.8x ", n + page);
+ for (i = 0; i < 4 && n <= max; i++, n += 4)
+ seq_printf(m, "%8.8x ",
+ rtw_read32(rtwdev, (page | n)));
+ }
+ seq_puts(m, "\n");
+ return 0;
+}
+
+static int rtw_debug_get_bb_page(struct seq_file *m, void *v)
+{
+ struct rtw_debugfs_priv *debugfs_priv = m->private;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ u32 val;
+ u32 page = debugfs_priv->cb_data;
+ int i, n;
+ int max = 0xff;
+
+ val = rtw_read32(rtwdev, debugfs_priv->cb_data);
+ for (n = 0; n <= max; ) {
+ seq_printf(m, "\n%8.8x ", n + page);
+ for (i = 0; i < 4 && n <= max; i++, n += 4)
+ seq_printf(m, "%8.8x ",
+ rtw_read32(rtwdev, (page | n)));
+ }
+ seq_puts(m, "\n");
+ return 0;
+}
+
+static int rtw_debug_get_rf_dump(struct seq_file *m, void *v)
+{
+ struct rtw_debugfs_priv *debugfs_priv = m->private;
+ struct rtw_dev *rtwdev = debugfs_priv->rtwdev;
+ u32 addr, offset, data;
+ u8 path;
+
+ for (path = 0; path < rtwdev->hal.rf_path_num; path++) {
+ seq_printf(m, "RF path:%d\n", path);
+ for (addr = 0; addr < 0x100; addr += 4) {
+ seq_printf(m, "%8.8x ", addr);
+ for (offset = 0; offset < 4; offset++) {
+ data = rtw_read_rf(rtwdev, path, addr + offset,
+ 0xffffffff);
+ seq_printf(m, "%8.8x ", data);
+ }
+ seq_puts(m, "\n");
+ }
+ seq_puts(m, "\n");
+ }
+
+ return 0;
+}
+
+#define rtw_debug_impl_mac(page, addr) \
+static struct rtw_debugfs_priv rtw_debug_priv_mac_ ##page = { \
+ .cb_read = rtw_debug_get_mac_page, \
+ .cb_data = addr, \
+}
+
+rtw_debug_impl_mac(0, 0x0000);
+rtw_debug_impl_mac(1, 0x0100);
+rtw_debug_impl_mac(2, 0x0200);
+rtw_debug_impl_mac(3, 0x0300);
+rtw_debug_impl_mac(4, 0x0400);
+rtw_debug_impl_mac(5, 0x0500);
+rtw_debug_impl_mac(6, 0x0600);
+rtw_debug_impl_mac(7, 0x0700);
+rtw_debug_impl_mac(10, 0x1000);
+rtw_debug_impl_mac(11, 0x1100);
+rtw_debug_impl_mac(12, 0x1200);
+rtw_debug_impl_mac(13, 0x1300);
+rtw_debug_impl_mac(14, 0x1400);
+rtw_debug_impl_mac(15, 0x1500);
+rtw_debug_impl_mac(16, 0x1600);
+rtw_debug_impl_mac(17, 0x1700);
+
+#define rtw_debug_impl_bb(page, addr) \
+static struct rtw_debugfs_priv rtw_debug_priv_bb_ ##page = { \
+ .cb_read = rtw_debug_get_bb_page, \
+ .cb_data = addr, \
+}
+
+rtw_debug_impl_bb(8, 0x0800);
+rtw_debug_impl_bb(9, 0x0900);
+rtw_debug_impl_bb(a, 0x0a00);
+rtw_debug_impl_bb(b, 0x0b00);
+rtw_debug_impl_bb(c, 0x0c00);
+rtw_debug_impl_bb(d, 0x0d00);
+rtw_debug_impl_bb(e, 0x0e00);
+rtw_debug_impl_bb(f, 0x0f00);
+rtw_debug_impl_bb(18, 0x1800);
+rtw_debug_impl_bb(19, 0x1900);
+rtw_debug_impl_bb(1a, 0x1a00);
+rtw_debug_impl_bb(1b, 0x1b00);
+rtw_debug_impl_bb(1c, 0x1c00);
+rtw_debug_impl_bb(1d, 0x1d00);
+rtw_debug_impl_bb(1e, 0x1e00);
+rtw_debug_impl_bb(1f, 0x1f00);
+rtw_debug_impl_bb(2c, 0x2c00);
+rtw_debug_impl_bb(2d, 0x2d00);
+rtw_debug_impl_bb(40, 0x4000);
+rtw_debug_impl_bb(41, 0x4100);
+
+static struct rtw_debugfs_priv rtw_debug_priv_rf_dump = {
+ .cb_read = rtw_debug_get_rf_dump,
+};
+
+static struct rtw_debugfs_priv rtw_debug_priv_write_reg = {
+ .cb_write = rtw_debugfs_set_write_reg,
+};
+
+static struct rtw_debugfs_priv rtw_debug_priv_rf_write = {
+ .cb_write = rtw_debugfs_set_rf_write,
+};
+
+static struct rtw_debugfs_priv rtw_debug_priv_rf_read = {
+ .cb_write = rtw_debugfs_set_rf_read,
+ .cb_read = rtw_debugfs_get_rf_read,
+};
+
+static struct rtw_debugfs_priv rtw_debug_priv_read_reg = {
+ .cb_write = rtw_debugfs_set_read_reg,
+ .cb_read = rtw_debugfs_get_read_reg,
+};
+
+static struct rtw_debugfs_priv rtw_debug_priv_dump_cam = {
+ .cb_write = rtw_debugfs_set_single_input,
+ .cb_read = rtw_debugfs_get_dump_cam,
+};
+
+static struct rtw_debugfs_priv rtw_debug_priv_rsvd_page = {
+ .cb_write = rtw_debugfs_set_rsvd_page,
+ .cb_read = rtw_debugfs_get_rsvd_page,
+};
+
+#define rtw_debugfs_add_core(name, mode, fopname, parent) \
+ do { \
+ rtw_debug_priv_ ##name.rtwdev = rtwdev; \
+ if (!debugfs_create_file(#name, mode, \
+ parent, &rtw_debug_priv_ ##name,\
+ &file_ops_ ##fopname)) \
+ pr_debug("Unable to initialize debugfs:%s\n", \
+ #name); \
+ } while (0)
+
+#define rtw_debugfs_add_w(name) \
+ rtw_debugfs_add_core(name, S_IFREG | 0222, common_write, debugfs_topdir)
+#define rtw_debugfs_add_rw(name) \
+ rtw_debugfs_add_core(name, S_IFREG | 0666, single_rw, debugfs_topdir)
+#define rtw_debugfs_add_r(name) \
+ rtw_debugfs_add_core(name, S_IFREG | 0444, single_r, debugfs_topdir)
+
+void rtw_debugfs_init(struct rtw_dev *rtwdev)
+{
+ struct dentry *debugfs_topdir = rtwdev->debugfs;
+
+ debugfs_topdir = debugfs_create_dir("rtw88",
+ rtwdev->hw->wiphy->debugfsdir);
+ rtw_debugfs_add_w(write_reg);
+ rtw_debugfs_add_rw(read_reg);
+ rtw_debugfs_add_w(rf_write);
+ rtw_debugfs_add_rw(rf_read);
+ rtw_debugfs_add_rw(dump_cam);
+ rtw_debugfs_add_rw(rsvd_page);
+ rtw_debugfs_add_r(mac_0);
+ rtw_debugfs_add_r(mac_1);
+ rtw_debugfs_add_r(mac_2);
+ rtw_debugfs_add_r(mac_3);
+ rtw_debugfs_add_r(mac_4);
+ rtw_debugfs_add_r(mac_5);
+ rtw_debugfs_add_r(mac_6);
+ rtw_debugfs_add_r(mac_7);
+ rtw_debugfs_add_r(bb_8);
+ rtw_debugfs_add_r(bb_9);
+ rtw_debugfs_add_r(bb_a);
+ rtw_debugfs_add_r(bb_b);
+ rtw_debugfs_add_r(bb_c);
+ rtw_debugfs_add_r(bb_d);
+ rtw_debugfs_add_r(bb_e);
+ rtw_debugfs_add_r(bb_f);
+ rtw_debugfs_add_r(mac_10);
+ rtw_debugfs_add_r(mac_11);
+ rtw_debugfs_add_r(mac_12);
+ rtw_debugfs_add_r(mac_13);
+ rtw_debugfs_add_r(mac_14);
+ rtw_debugfs_add_r(mac_15);
+ rtw_debugfs_add_r(mac_16);
+ rtw_debugfs_add_r(mac_17);
+ rtw_debugfs_add_r(bb_18);
+ rtw_debugfs_add_r(bb_19);
+ rtw_debugfs_add_r(bb_1a);
+ rtw_debugfs_add_r(bb_1b);
+ rtw_debugfs_add_r(bb_1c);
+ rtw_debugfs_add_r(bb_1d);
+ rtw_debugfs_add_r(bb_1e);
+ rtw_debugfs_add_r(bb_1f);
+ if (rtwdev->chip->id == RTW_CHIP_TYPE_8822C) {
+ rtw_debugfs_add_r(bb_2c);
+ rtw_debugfs_add_r(bb_2d);
+ rtw_debugfs_add_r(bb_40);
+ rtw_debugfs_add_r(bb_41);
+ }
+ rtw_debugfs_add_r(rf_dump);
+}
+
+#endif /* CONFIG_RTW88_DEBUGFS */
+
+#ifdef CONFIG_RTW88_DEBUG
+
+void __rtw_dbg(struct rtw_dev *rtwdev, const char *fmt, ...)
+{
+ struct va_format vaf = {
+ .fmt = fmt,
+ };
+ va_list args;
+
+ va_start(args, fmt);
+ vaf.va = &args;
+
+ if (net_ratelimit())
+ dev_dbg(rtwdev->dev, "%pV", &vaf);
+
+ va_end(args);
+}
+EXPORT_SYMBOL(__rtw_dbg);
+
+#endif /* CONFIG_RTW88_DEBUG */
diff --git a/drivers/net/wireless/realtek/rtw88/debug.h b/drivers/net/wireless/realtek/rtw88/debug.h
new file mode 100644
index 0000000..231e4e8
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/debug.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2018 Realtek Corporation.
+ */
+
+#ifndef __RTW_DEBUG_H
+#define __RTW_DEBUG_H
+
+#ifdef CONFIG_RTW88_DEBUGFS
+
+void rtw_debugfs_init(struct rtw_dev *rtwdev);
+
+#else
+
+static inline void rtw_debugfs_init(struct rtw_dev *rtwdev) {}
+
+#endif /* CONFIG_RTW88_DEBUGFS */
+
+#ifdef CONFIG_RTW88_DEBUG
+
+__printf(2, 3)
+void __rtw_dbg(struct rtw_dev *rtwdev, const char *fmt, ...);
+
+#define rtw_dbg(rtwdev, a...) __rtw_dbg(rtwdev, ##a)
+
+#else
+
+static inline void rtw_dbg(struct rtw_dev *rtwdev, const char *fmt, ...) {}
+
+#endif /* CONFIG_RTW88_DEBUG */
+
+#define rtw_info(rtwdev, a...) dev_info(rtwdev->dev, ##a)
+#define rtw_warn(rtwdev, a...) dev_warn(rtwdev->dev, ##a)
+#define rtw_err(rtwdev, a...) dev_err(rtwdev->dev, ##a)
+
+#endif
--
2.7.4
