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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 10:29:37 +00:00
![Dan Carpenter](/assets/img/avatar_default.png)
If the copy_from_user() fails or the user gives invalid date then the
correct thing to do is to return a negative error code. (Currently it
returns success).
I made a copy additional related cleanups:
1) There is no need to check "buffer" for NULL. That's handled by
copy_from_user().
2) The "h2c_len" variable cannot be negative because it is unsigned
and because sscanf() does not return negative error codes.
Fixes: 610247f46f
("rtlwifi: Improve debugging by using debugfs")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/YoOLnDkHgVltyXK7@kili
514 lines
13 KiB
C
514 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2009-2012 Realtek Corporation.*/
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#include "wifi.h"
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#include "cam.h"
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#include <linux/moduleparam.h>
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#include <linux/vmalloc.h>
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#ifdef CONFIG_RTLWIFI_DEBUG
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void _rtl_dbg_print(struct rtl_priv *rtlpriv, u64 comp, int level,
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const char *fmt, ...)
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{
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if (unlikely((comp & rtlpriv->cfg->mod_params->debug_mask) &&
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level <= rtlpriv->cfg->mod_params->debug_level)) {
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struct va_format vaf;
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va_list args;
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va_start(args, fmt);
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vaf.fmt = fmt;
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vaf.va = &args;
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pr_info("%pV", &vaf);
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va_end(args);
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}
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}
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EXPORT_SYMBOL_GPL(_rtl_dbg_print);
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void _rtl_dbg_print_data(struct rtl_priv *rtlpriv, u64 comp, int level,
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const char *titlestring,
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const void *hexdata, int hexdatalen)
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{
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if (unlikely(((comp) & rtlpriv->cfg->mod_params->debug_mask) &&
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((level) <= rtlpriv->cfg->mod_params->debug_level))) {
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pr_info("In process \"%s\" (pid %i): %s\n",
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current->comm, current->pid, titlestring);
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print_hex_dump_bytes("", DUMP_PREFIX_NONE,
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hexdata, hexdatalen);
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}
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}
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EXPORT_SYMBOL_GPL(_rtl_dbg_print_data);
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struct rtl_debugfs_priv {
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struct rtl_priv *rtlpriv;
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int (*cb_read)(struct seq_file *m, void *v);
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ssize_t (*cb_write)(struct file *filp, const char __user *buffer,
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size_t count, loff_t *loff);
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u32 cb_data;
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};
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static struct dentry *debugfs_topdir;
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static int rtl_debug_get_common(struct seq_file *m, void *v)
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{
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struct rtl_debugfs_priv *debugfs_priv = m->private;
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return debugfs_priv->cb_read(m, v);
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}
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static int dl_debug_open_common(struct inode *inode, struct file *file)
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{
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return single_open(file, rtl_debug_get_common, inode->i_private);
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}
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static const struct file_operations file_ops_common = {
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.open = dl_debug_open_common,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int rtl_debug_get_mac_page(struct seq_file *m, void *v)
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{
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struct rtl_debugfs_priv *debugfs_priv = m->private;
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struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
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u32 page = debugfs_priv->cb_data;
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int i, n;
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int max = 0xff;
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for (n = 0; n <= max; ) {
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seq_printf(m, "\n%8.8x ", n + page);
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for (i = 0; i < 4 && n <= max; i++, n += 4)
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seq_printf(m, "%8.8x ",
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rtl_read_dword(rtlpriv, (page | n)));
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}
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seq_puts(m, "\n");
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return 0;
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}
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#define RTL_DEBUG_IMPL_MAC_SERIES(page, addr) \
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static struct rtl_debugfs_priv rtl_debug_priv_mac_ ##page = { \
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.cb_read = rtl_debug_get_mac_page, \
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.cb_data = addr, \
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}
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RTL_DEBUG_IMPL_MAC_SERIES(0, 0x0000);
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RTL_DEBUG_IMPL_MAC_SERIES(1, 0x0100);
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RTL_DEBUG_IMPL_MAC_SERIES(2, 0x0200);
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RTL_DEBUG_IMPL_MAC_SERIES(3, 0x0300);
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RTL_DEBUG_IMPL_MAC_SERIES(4, 0x0400);
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RTL_DEBUG_IMPL_MAC_SERIES(5, 0x0500);
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RTL_DEBUG_IMPL_MAC_SERIES(6, 0x0600);
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RTL_DEBUG_IMPL_MAC_SERIES(7, 0x0700);
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RTL_DEBUG_IMPL_MAC_SERIES(10, 0x1000);
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RTL_DEBUG_IMPL_MAC_SERIES(11, 0x1100);
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RTL_DEBUG_IMPL_MAC_SERIES(12, 0x1200);
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RTL_DEBUG_IMPL_MAC_SERIES(13, 0x1300);
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RTL_DEBUG_IMPL_MAC_SERIES(14, 0x1400);
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RTL_DEBUG_IMPL_MAC_SERIES(15, 0x1500);
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RTL_DEBUG_IMPL_MAC_SERIES(16, 0x1600);
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RTL_DEBUG_IMPL_MAC_SERIES(17, 0x1700);
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static int rtl_debug_get_bb_page(struct seq_file *m, void *v)
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{
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struct rtl_debugfs_priv *debugfs_priv = m->private;
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struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
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struct ieee80211_hw *hw = rtlpriv->hw;
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u32 page = debugfs_priv->cb_data;
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int i, n;
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int max = 0xff;
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for (n = 0; n <= max; ) {
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seq_printf(m, "\n%8.8x ", n + page);
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for (i = 0; i < 4 && n <= max; i++, n += 4)
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seq_printf(m, "%8.8x ",
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rtl_get_bbreg(hw, (page | n), 0xffffffff));
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}
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seq_puts(m, "\n");
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return 0;
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}
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#define RTL_DEBUG_IMPL_BB_SERIES(page, addr) \
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static struct rtl_debugfs_priv rtl_debug_priv_bb_ ##page = { \
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.cb_read = rtl_debug_get_bb_page, \
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.cb_data = addr, \
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}
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RTL_DEBUG_IMPL_BB_SERIES(8, 0x0800);
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RTL_DEBUG_IMPL_BB_SERIES(9, 0x0900);
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RTL_DEBUG_IMPL_BB_SERIES(a, 0x0a00);
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RTL_DEBUG_IMPL_BB_SERIES(b, 0x0b00);
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RTL_DEBUG_IMPL_BB_SERIES(c, 0x0c00);
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RTL_DEBUG_IMPL_BB_SERIES(d, 0x0d00);
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RTL_DEBUG_IMPL_BB_SERIES(e, 0x0e00);
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RTL_DEBUG_IMPL_BB_SERIES(f, 0x0f00);
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RTL_DEBUG_IMPL_BB_SERIES(18, 0x1800);
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RTL_DEBUG_IMPL_BB_SERIES(19, 0x1900);
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RTL_DEBUG_IMPL_BB_SERIES(1a, 0x1a00);
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RTL_DEBUG_IMPL_BB_SERIES(1b, 0x1b00);
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RTL_DEBUG_IMPL_BB_SERIES(1c, 0x1c00);
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RTL_DEBUG_IMPL_BB_SERIES(1d, 0x1d00);
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RTL_DEBUG_IMPL_BB_SERIES(1e, 0x1e00);
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RTL_DEBUG_IMPL_BB_SERIES(1f, 0x1f00);
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static int rtl_debug_get_reg_rf(struct seq_file *m, void *v)
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{
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struct rtl_debugfs_priv *debugfs_priv = m->private;
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struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
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struct ieee80211_hw *hw = rtlpriv->hw;
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enum radio_path rfpath = debugfs_priv->cb_data;
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int i, n;
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int max = 0x40;
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if (IS_HARDWARE_TYPE_8822B(rtlpriv))
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max = 0xff;
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seq_printf(m, "\nPATH(%d)", rfpath);
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for (n = 0; n <= max; ) {
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seq_printf(m, "\n%8.8x ", n);
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for (i = 0; i < 4 && n <= max; n += 1, i++)
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seq_printf(m, "%8.8x ",
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rtl_get_rfreg(hw, rfpath, n, 0xffffffff));
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}
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seq_puts(m, "\n");
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return 0;
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}
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#define RTL_DEBUG_IMPL_RF_SERIES(page, addr) \
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static struct rtl_debugfs_priv rtl_debug_priv_rf_ ##page = { \
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.cb_read = rtl_debug_get_reg_rf, \
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.cb_data = addr, \
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}
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RTL_DEBUG_IMPL_RF_SERIES(a, RF90_PATH_A);
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RTL_DEBUG_IMPL_RF_SERIES(b, RF90_PATH_B);
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static int rtl_debug_get_cam_register(struct seq_file *m, void *v)
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{
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struct rtl_debugfs_priv *debugfs_priv = m->private;
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struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
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int start = debugfs_priv->cb_data;
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u32 target_cmd = 0;
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u32 target_val = 0;
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u8 entry_i = 0;
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u32 ulstatus;
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int i = 100, j = 0;
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int end = (start + 11 > TOTAL_CAM_ENTRY ? TOTAL_CAM_ENTRY : start + 11);
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/* This dump the current register page */
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seq_printf(m,
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"\n#################### SECURITY CAM (%d-%d) ##################\n",
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start, end - 1);
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for (j = start; j < end; j++) {
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seq_printf(m, "\nD: %2x > ", j);
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for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
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/* polling bit, and No Write enable, and address */
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target_cmd = entry_i + CAM_CONTENT_COUNT * j;
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target_cmd = target_cmd | BIT(31);
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/* Check polling bit is clear */
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while ((i--) >= 0) {
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ulstatus =
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rtl_read_dword(rtlpriv,
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rtlpriv->cfg->maps[RWCAM]);
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if (ulstatus & BIT(31))
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continue;
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else
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break;
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}
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rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
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target_cmd);
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target_val = rtl_read_dword(rtlpriv,
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rtlpriv->cfg->maps[RCAMO]);
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seq_printf(m, "%8.8x ", target_val);
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}
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}
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seq_puts(m, "\n");
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return 0;
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}
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#define RTL_DEBUG_IMPL_CAM_SERIES(page, addr) \
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static struct rtl_debugfs_priv rtl_debug_priv_cam_ ##page = { \
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.cb_read = rtl_debug_get_cam_register, \
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.cb_data = addr, \
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}
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RTL_DEBUG_IMPL_CAM_SERIES(1, 0);
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RTL_DEBUG_IMPL_CAM_SERIES(2, 11);
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RTL_DEBUG_IMPL_CAM_SERIES(3, 22);
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static int rtl_debug_get_btcoex(struct seq_file *m, void *v)
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{
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struct rtl_debugfs_priv *debugfs_priv = m->private;
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struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
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if (rtlpriv->cfg->ops->get_btc_status())
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rtlpriv->btcoexist.btc_ops->btc_display_bt_coex_info(rtlpriv,
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m);
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seq_puts(m, "\n");
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return 0;
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}
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static struct rtl_debugfs_priv rtl_debug_priv_btcoex = {
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.cb_read = rtl_debug_get_btcoex,
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.cb_data = 0,
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};
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static ssize_t rtl_debugfs_set_write_reg(struct file *filp,
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const char __user *buffer,
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size_t count, loff_t *loff)
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{
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struct rtl_debugfs_priv *debugfs_priv = filp->private_data;
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struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
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char tmp[32 + 1];
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int tmp_len;
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u32 addr, val, len;
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int num;
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if (count < 3)
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return -EFAULT;
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tmp_len = (count > sizeof(tmp) - 1 ? sizeof(tmp) - 1 : count);
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if (!buffer || copy_from_user(tmp, buffer, tmp_len))
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return count;
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tmp[tmp_len] = '\0';
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/* write BB/MAC register */
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num = sscanf(tmp, "%x %x %x", &addr, &val, &len);
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if (num != 3)
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return count;
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switch (len) {
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case 1:
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rtl_write_byte(rtlpriv, addr, (u8)val);
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break;
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case 2:
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rtl_write_word(rtlpriv, addr, (u16)val);
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break;
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case 4:
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rtl_write_dword(rtlpriv, addr, val);
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break;
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default:
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/*printk("error write length=%d", len);*/
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break;
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}
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return count;
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}
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static struct rtl_debugfs_priv rtl_debug_priv_write_reg = {
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.cb_write = rtl_debugfs_set_write_reg,
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};
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static ssize_t rtl_debugfs_set_write_h2c(struct file *filp,
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const char __user *buffer,
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size_t count, loff_t *loff)
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{
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struct rtl_debugfs_priv *debugfs_priv = filp->private_data;
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struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
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struct ieee80211_hw *hw = rtlpriv->hw;
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char tmp[32 + 1];
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int tmp_len;
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u8 h2c_len, h2c_data_packed[8];
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int h2c_data[8]; /* idx 0: cmd */
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int i;
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if (count < 3)
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return -EFAULT;
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tmp_len = (count > sizeof(tmp) - 1 ? sizeof(tmp) - 1 : count);
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if (copy_from_user(tmp, buffer, tmp_len))
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return -EFAULT;
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tmp[tmp_len] = '\0';
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h2c_len = sscanf(tmp, "%X %X %X %X %X %X %X %X",
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&h2c_data[0], &h2c_data[1],
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&h2c_data[2], &h2c_data[3],
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&h2c_data[4], &h2c_data[5],
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&h2c_data[6], &h2c_data[7]);
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if (h2c_len == 0)
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return -EINVAL;
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for (i = 0; i < h2c_len; i++)
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h2c_data_packed[i] = (u8)h2c_data[i];
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rtlpriv->cfg->ops->fill_h2c_cmd(hw, h2c_data_packed[0],
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h2c_len - 1,
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&h2c_data_packed[1]);
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return count;
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}
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static struct rtl_debugfs_priv rtl_debug_priv_write_h2c = {
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.cb_write = rtl_debugfs_set_write_h2c,
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};
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static ssize_t rtl_debugfs_set_write_rfreg(struct file *filp,
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const char __user *buffer,
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size_t count, loff_t *loff)
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{
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struct rtl_debugfs_priv *debugfs_priv = filp->private_data;
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struct rtl_priv *rtlpriv = debugfs_priv->rtlpriv;
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struct ieee80211_hw *hw = rtlpriv->hw;
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char tmp[32 + 1];
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int tmp_len;
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int num;
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int path;
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u32 addr, bitmask, data;
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if (count < 3)
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return -EFAULT;
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tmp_len = (count > sizeof(tmp) - 1 ? sizeof(tmp) - 1 : count);
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if (!buffer || copy_from_user(tmp, buffer, tmp_len))
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return count;
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tmp[tmp_len] = '\0';
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num = sscanf(tmp, "%X %X %X %X",
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&path, &addr, &bitmask, &data);
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if (num != 4) {
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rtl_dbg(rtlpriv, COMP_ERR, DBG_DMESG,
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"Format is <path> <addr> <mask> <data>\n");
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return count;
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}
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rtl_set_rfreg(hw, path, addr, bitmask, data);
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return count;
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}
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static struct rtl_debugfs_priv rtl_debug_priv_write_rfreg = {
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.cb_write = rtl_debugfs_set_write_rfreg,
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};
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static int rtl_debugfs_close(struct inode *inode, struct file *filp)
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{
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return 0;
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}
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static ssize_t rtl_debugfs_common_write(struct file *filp,
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const char __user *buffer,
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size_t count, loff_t *loff)
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{
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struct rtl_debugfs_priv *debugfs_priv = filp->private_data;
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return debugfs_priv->cb_write(filp, buffer, count, loff);
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}
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static const struct file_operations file_ops_common_write = {
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.owner = THIS_MODULE,
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.write = rtl_debugfs_common_write,
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.open = simple_open,
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.release = rtl_debugfs_close,
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};
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#define RTL_DEBUGFS_ADD_CORE(name, mode, fopname) \
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do { \
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rtl_debug_priv_ ##name.rtlpriv = rtlpriv; \
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debugfs_create_file(#name, mode, parent, \
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&rtl_debug_priv_ ##name, \
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&file_ops_ ##fopname); \
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} while (0)
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#define RTL_DEBUGFS_ADD(name) \
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RTL_DEBUGFS_ADD_CORE(name, S_IFREG | 0444, common)
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#define RTL_DEBUGFS_ADD_W(name) \
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RTL_DEBUGFS_ADD_CORE(name, S_IFREG | 0222, common_write)
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void rtl_debug_add_one(struct ieee80211_hw *hw)
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{
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struct rtl_priv *rtlpriv = rtl_priv(hw);
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struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
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struct dentry *parent;
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snprintf(rtlpriv->dbg.debugfs_name, 18, "%pMF", rtlefuse->dev_addr);
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rtlpriv->dbg.debugfs_dir =
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debugfs_create_dir(rtlpriv->dbg.debugfs_name, debugfs_topdir);
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parent = rtlpriv->dbg.debugfs_dir;
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RTL_DEBUGFS_ADD(mac_0);
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RTL_DEBUGFS_ADD(mac_1);
|
|
RTL_DEBUGFS_ADD(mac_2);
|
|
RTL_DEBUGFS_ADD(mac_3);
|
|
RTL_DEBUGFS_ADD(mac_4);
|
|
RTL_DEBUGFS_ADD(mac_5);
|
|
RTL_DEBUGFS_ADD(mac_6);
|
|
RTL_DEBUGFS_ADD(mac_7);
|
|
RTL_DEBUGFS_ADD(bb_8);
|
|
RTL_DEBUGFS_ADD(bb_9);
|
|
RTL_DEBUGFS_ADD(bb_a);
|
|
RTL_DEBUGFS_ADD(bb_b);
|
|
RTL_DEBUGFS_ADD(bb_c);
|
|
RTL_DEBUGFS_ADD(bb_d);
|
|
RTL_DEBUGFS_ADD(bb_e);
|
|
RTL_DEBUGFS_ADD(bb_f);
|
|
RTL_DEBUGFS_ADD(mac_10);
|
|
RTL_DEBUGFS_ADD(mac_11);
|
|
RTL_DEBUGFS_ADD(mac_12);
|
|
RTL_DEBUGFS_ADD(mac_13);
|
|
RTL_DEBUGFS_ADD(mac_14);
|
|
RTL_DEBUGFS_ADD(mac_15);
|
|
RTL_DEBUGFS_ADD(mac_16);
|
|
RTL_DEBUGFS_ADD(mac_17);
|
|
RTL_DEBUGFS_ADD(bb_18);
|
|
RTL_DEBUGFS_ADD(bb_19);
|
|
RTL_DEBUGFS_ADD(bb_1a);
|
|
RTL_DEBUGFS_ADD(bb_1b);
|
|
RTL_DEBUGFS_ADD(bb_1c);
|
|
RTL_DEBUGFS_ADD(bb_1d);
|
|
RTL_DEBUGFS_ADD(bb_1e);
|
|
RTL_DEBUGFS_ADD(bb_1f);
|
|
RTL_DEBUGFS_ADD(rf_a);
|
|
RTL_DEBUGFS_ADD(rf_b);
|
|
|
|
RTL_DEBUGFS_ADD(cam_1);
|
|
RTL_DEBUGFS_ADD(cam_2);
|
|
RTL_DEBUGFS_ADD(cam_3);
|
|
|
|
RTL_DEBUGFS_ADD(btcoex);
|
|
|
|
RTL_DEBUGFS_ADD_W(write_reg);
|
|
RTL_DEBUGFS_ADD_W(write_h2c);
|
|
RTL_DEBUGFS_ADD_W(write_rfreg);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rtl_debug_add_one);
|
|
|
|
void rtl_debug_remove_one(struct ieee80211_hw *hw)
|
|
{
|
|
struct rtl_priv *rtlpriv = rtl_priv(hw);
|
|
|
|
debugfs_remove_recursive(rtlpriv->dbg.debugfs_dir);
|
|
rtlpriv->dbg.debugfs_dir = NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rtl_debug_remove_one);
|
|
|
|
void rtl_debugfs_add_topdir(void)
|
|
{
|
|
debugfs_topdir = debugfs_create_dir("rtlwifi", NULL);
|
|
}
|
|
|
|
void rtl_debugfs_remove_topdir(void)
|
|
{
|
|
debugfs_remove_recursive(debugfs_topdir);
|
|
}
|
|
|
|
#endif
|