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authorZhu Yi <yi.zhu@intel.com>2007-09-27 11:27:42 +0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:53:26 -0700
commit98d7e09af513da19389128f23d49893b11de81fa (patch)
tree3d9d31a105de2b714c6a27e8a50e4b91411a2dc8
parent1b696de23bb21b89f4a4c4fd6b12e26fe2cc4a37 (diff)
[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>
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-4965-rs.c72
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 c4b8ca12849..e5f8cce443b 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,
};