From 98d7e09af513da19389128f23d49893b11de81fa Mon Sep 17 00:00:00 2001 From: Zhu Yi Date: Thu, 27 Sep 2007 11:27:42 +0800 Subject: [PATCH] [PATCH] iwlwifi: set fixed rate through debugfs This patch adds fixed rate setting through debugfs $ echo > \ /sys/kernel/debug/ieee80211/phy/stations//rate_scale_table Currently there is no way to turn to rate scaling working again. Will be fixed in later. Signed-off-by: Tomas Winkler Signed-off-by: Zhu Yi Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl-4965-rs.c | 72 +++++++++++++++++++++- 1 file changed, 70 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c index c4b8ca128495..e5f8cce443ba 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c +++ b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c @@ -123,7 +123,9 @@ struct iwl_rate_scale_priv { struct iwl_link_quality_cmd lq; struct iwl_scale_tbl_info lq_info[LQ_SIZE]; #ifdef CONFIG_MAC80211_DEBUGFS - struct dentry *rs_sta_dbgfs_scale_table_file; + struct dentry *rs_sta_dbgfs_scale_table_file; + struct iwl_rate dbg_fixed; + struct iwl_priv *drv; #endif }; @@ -136,6 +138,14 @@ static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, struct iwl_link_quality_cmd *tbl); +#ifdef CONFIG_MAC80211_DEBUGFS +static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, + struct iwl_rate *mcs, int index); +#else +static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, + struct iwl_rate *mcs, int index) +{} +#endif static s32 expected_tpt_A[IWL_RATE_COUNT] = { 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 }; @@ -1866,6 +1876,9 @@ static void rs_rate_init(void *priv_rate, void *priv_sta, IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl->active_siso_rate, crl->active_mimo_rate); #endif /*CONFIG_IWLWIFI_HT*/ +#ifdef CONFIG_MAC80211_DEBUGFS + crl->drv = priv; +#endif if (priv->assoc_station_added) priv->lq_mngr.lq_ready = 1; @@ -1885,6 +1898,8 @@ static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, struct iwl_rate new_rate; struct iwl_scale_tbl_info tbl_type = { 0 }; + rs_dbgfs_set_mcs(lq_data, tx_mcs, index); + rs_get_tbl_info_from_mcs(tx_mcs, lq_data->phymode, &tbl_type, &rate_idx); @@ -1919,6 +1934,8 @@ static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, ant_toggle_count = 1; } } + + rs_dbgfs_set_mcs(lq_data, &new_rate, index); lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate.rate_n_flags); repeat_rate--; @@ -1947,6 +1964,7 @@ static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, use_ht_possible = 0; + rs_dbgfs_set_mcs(lq_data, &new_rate, index); lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate.rate_n_flags); @@ -2002,7 +2020,54 @@ static int open_file_generic(struct inode *inode, struct file *file) file->private_data = inode->i_private; return 0; } +static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, + struct iwl_rate *mcs, int index) +{ + const u32 cck_rate = 0x820A; + if (rs_priv->dbg_fixed.rate_n_flags) { + if (index < 12) + mcs->rate_n_flags = rs_priv->dbg_fixed.rate_n_flags; + else + mcs->rate_n_flags = cck_rate; + IWL_DEBUG_RATE("Fixed rate ON\n"); + return; + } + + IWL_DEBUG_RATE("Fixed rate OFF\n"); +} +static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, + const char __user *user_buf, size_t count, loff_t *ppos) +{ + struct iwl_rate_scale_priv *rs_priv = file->private_data; + char buf[64]; + int buf_size; + u32 parsed_rate; + + memset(buf, 0, sizeof(buf)); + buf_size = min(count, sizeof(buf) - 1); + if (copy_from_user(buf, user_buf, buf_size)) + return -EFAULT; + + if (sscanf(buf, "%x", &parsed_rate) == 1) + rs_priv->dbg_fixed.rate_n_flags = parsed_rate; + else + rs_priv->dbg_fixed.rate_n_flags = 0; + + rs_priv->active_rate = 0x0FFF; + rs_priv->active_siso_rate = 0x1FD0; + rs_priv->active_mimo_rate = 0x1FD0; + + IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", + rs_priv->lq.sta_id, rs_priv->dbg_fixed.rate_n_flags); + + if (rs_priv->dbg_fixed.rate_n_flags) { + rs_fill_link_cmd(rs_priv, &rs_priv->dbg_fixed, &rs_priv->lq); + rs_send_lq_cmd(rs_priv->drv, &rs_priv->lq, CMD_ASYNC); + } + + return count; +} static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { @@ -2013,9 +2078,11 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, struct iwl_rate_scale_priv *rs_priv = file->private_data; desc += sprintf(buff+desc, "sta_id %d\n", rs_priv->lq.sta_id); - desc += sprintf(buff+desc, "failed=%d success=%d rate=%X\n", + desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", rs_priv->total_failed, rs_priv->total_success, rs_priv->active_rate); + desc += sprintf(buff+desc, "fixed rate 0x%X\n", + rs_priv->dbg_fixed.rate_n_flags); desc += sprintf(buff+desc, "general:" "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", rs_priv->lq.general_params.flags, @@ -2045,6 +2112,7 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, } static const struct file_operations rs_sta_dbgfs_scale_table_ops = { + .write = rs_sta_dbgfs_scale_table_write, .read = rs_sta_dbgfs_scale_table_read, .open = open_file_generic, }; -- 2.30.2