[PATCH] iwlwifi: set fixed rate through debugfs
This patch adds fixed rate setting through debugfs $ echo <rate_n_flags> > \ /sys/kernel/debug/ieee80211/phy<X>/stations/<mac>/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 <tomas.winkler@intel.com> Signed-off-by: Zhu Yi <yi.zhu@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>hifive-unleashed-5.1
Zhu Yi
David S. Miller
parent
1b696de23b
commit
98d7e09af5
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@ -123,7 +123,9 @@ struct iwl_rate_scale_priv {
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struct iwl_link_quality_cmd lq;
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struct iwl_scale_tbl_info lq_info[LQ_SIZE];
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#ifdef CONFIG_MAC80211_DEBUGFS
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struct dentry *rs_sta_dbgfs_scale_table_file;
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struct dentry *rs_sta_dbgfs_scale_table_file;
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struct iwl_rate dbg_fixed;
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struct iwl_priv *drv;
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#endif
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};
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@ -136,6 +138,14 @@ static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data,
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struct iwl_link_quality_cmd *tbl);
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#ifdef CONFIG_MAC80211_DEBUGFS
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static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv,
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struct iwl_rate *mcs, int index);
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#else
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static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv,
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struct iwl_rate *mcs, int index)
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{}
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#endif
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static s32 expected_tpt_A[IWL_RATE_COUNT] = {
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0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186
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};
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@ -1866,6 +1876,9 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
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IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl->active_siso_rate,
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crl->active_mimo_rate);
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#endif /*CONFIG_IWLWIFI_HT*/
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#ifdef CONFIG_MAC80211_DEBUGFS
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crl->drv = priv;
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#endif
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if (priv->assoc_station_added)
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priv->lq_mngr.lq_ready = 1;
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@ -1885,6 +1898,8 @@ static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data,
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struct iwl_rate new_rate;
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struct iwl_scale_tbl_info tbl_type = { 0 };
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rs_dbgfs_set_mcs(lq_data, tx_mcs, index);
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rs_get_tbl_info_from_mcs(tx_mcs, lq_data->phymode,
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&tbl_type, &rate_idx);
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@ -1919,6 +1934,8 @@ static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data,
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ant_toggle_count = 1;
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}
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}
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rs_dbgfs_set_mcs(lq_data, &new_rate, index);
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lq_cmd->rs_table[index].rate_n_flags =
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cpu_to_le32(new_rate.rate_n_flags);
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repeat_rate--;
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@ -1947,6 +1964,7 @@ static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data,
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use_ht_possible = 0;
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rs_dbgfs_set_mcs(lq_data, &new_rate, index);
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lq_cmd->rs_table[index].rate_n_flags =
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cpu_to_le32(new_rate.rate_n_flags);
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@ -2002,7 +2020,54 @@ static int open_file_generic(struct inode *inode, struct file *file)
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file->private_data = inode->i_private;
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return 0;
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}
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static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv,
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struct iwl_rate *mcs, int index)
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{
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const u32 cck_rate = 0x820A;
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if (rs_priv->dbg_fixed.rate_n_flags) {
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if (index < 12)
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mcs->rate_n_flags = rs_priv->dbg_fixed.rate_n_flags;
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else
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mcs->rate_n_flags = cck_rate;
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IWL_DEBUG_RATE("Fixed rate ON\n");
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return;
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}
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IWL_DEBUG_RATE("Fixed rate OFF\n");
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}
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static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file,
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const char __user *user_buf, size_t count, loff_t *ppos)
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{
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struct iwl_rate_scale_priv *rs_priv = file->private_data;
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char buf[64];
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int buf_size;
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u32 parsed_rate;
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memset(buf, 0, sizeof(buf));
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buf_size = min(count, sizeof(buf) - 1);
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if (copy_from_user(buf, user_buf, buf_size))
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return -EFAULT;
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if (sscanf(buf, "%x", &parsed_rate) == 1)
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rs_priv->dbg_fixed.rate_n_flags = parsed_rate;
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else
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rs_priv->dbg_fixed.rate_n_flags = 0;
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rs_priv->active_rate = 0x0FFF;
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rs_priv->active_siso_rate = 0x1FD0;
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rs_priv->active_mimo_rate = 0x1FD0;
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IWL_DEBUG_RATE("sta_id %d rate 0x%X\n",
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rs_priv->lq.sta_id, rs_priv->dbg_fixed.rate_n_flags);
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if (rs_priv->dbg_fixed.rate_n_flags) {
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rs_fill_link_cmd(rs_priv, &rs_priv->dbg_fixed, &rs_priv->lq);
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rs_send_lq_cmd(rs_priv->drv, &rs_priv->lq, CMD_ASYNC);
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}
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return count;
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}
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static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
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char __user *user_buf, size_t count, loff_t *ppos)
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{
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@ -2013,9 +2078,11 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
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struct iwl_rate_scale_priv *rs_priv = file->private_data;
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desc += sprintf(buff+desc, "sta_id %d\n", rs_priv->lq.sta_id);
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desc += sprintf(buff+desc, "failed=%d success=%d rate=%X\n",
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desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n",
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rs_priv->total_failed, rs_priv->total_success,
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rs_priv->active_rate);
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desc += sprintf(buff+desc, "fixed rate 0x%X\n",
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rs_priv->dbg_fixed.rate_n_flags);
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desc += sprintf(buff+desc, "general:"
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"flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n",
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rs_priv->lq.general_params.flags,
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@ -2045,6 +2112,7 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
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}
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static const struct file_operations rs_sta_dbgfs_scale_table_ops = {
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.write = rs_sta_dbgfs_scale_table_write,
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.read = rs_sta_dbgfs_scale_table_read,
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.open = open_file_generic,
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};
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