Commit 98d7e09a authored by Zhu Yi's avatar Zhu Yi Committed by David S. Miller
Browse files

[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: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarZhu Yi <yi.zhu@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 1b696de2
......@@ -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,
};
......
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