On Thu, 27 Sep 2007 11:27:42 +0800 Zhu Yi wrote:
> This patch adds fixed rate setting through debugfs
Is this just for developer/tester debug use, not for normal use?
> $ 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@xxxxxxxxx>
> Signed-off-by: Zhu Yi <yi.zhu@xxxxxxxxx>
> ---
> drivers/net/wireless/iwlwifi/iwl-4965-rs.c | 72 +++++++++++++++++++++++++++-
> 1 files 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 c4b8ca1..e5f8cce 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,
> };
> --
> 1.5.1
> -
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---
~Randy
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