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iwlwifi: Display decoded rate/mcs information 

This patch adding MCS information in rate_scale_table, it help for
debugging rate scaling algorithm, easy to understand what is the current
rate scale table and matching modulation, plus the last mcs used for tx.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Wey-Yi Guy 2009-04-08 11:39:27 -07:00 committed by John W. Linville
parent bd564261d7
commit 12b9681721
2 changed files with 43 additions and 4 deletions
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40
drivers/net/wireless/iwlwifi/iwl-agn-rs.c
View File

@ -167,6 +167,8 @@ struct iwl_lq_sta {
/* used to be in sta_info */
int last_txrate_idx;
/* last tx rate_n_flags */
u32 last_rate_n_flags;
};
static void rs_rate_scale_perform(struct iwl_priv *priv,
@ -249,6 +251,23 @@ static s32 expected_tpt_mimo3_40MHzSGI[IWL_RATE_COUNT] = {
0, 0, 0, 0, 160, 160, 219, 245, 261, 284, 294, 297, 300
};
/* mbps, mcs */
const static struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = {
{"1", ""},
{"2", ""},
{"5.5", ""},
{"11", ""},
{"6", "BPSK 1/2"},
{"9", "BPSK 1/2"},
{"12", "QPSK 1/2"},
{"18", "QPSK 3/4"},
{"24", "16QAM 1/2"},
{"36", "16QAM 3/4"},
{"48", "64QAM 2/3"},
{"54", "64QAM 3/4"},
{"60", "64QAM 5/6"}
};
static inline u8 rs_extract_rate(u32 rate_n_flags)
{
return (u8)(rate_n_flags & 0xFF);
@ -919,6 +938,7 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
* else look up the rate that was, finally, successful.
*/
tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags);
lq_sta->last_rate_n_flags = tx_rate;
rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index);
/* Update frame history window with "success" if Tx got ACKed ... */
@ -2826,6 +2846,7 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
char *buff;
int desc = 0;
int i = 0;
int index = 0;
ssize_t ret;
struct iwl_lq_sta *lq_sta = file->private_data;
@ -2857,6 +2878,8 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
(tbl->is_fat) ? "40MHz" : "20MHz");
desc += sprintf(buff+desc, " %s\n", (tbl->is_SGI) ? "SGI" : "");
}
desc += sprintf(buff+desc, "last tx rate=0x%X\n",
lq_sta->last_rate_n_flags);
desc += sprintf(buff+desc, "general:"
"flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n",
lq_sta->lq.general_params.flags,
@ -2877,10 +2900,19 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
lq_sta->lq.general_params.start_rate_index[2],
lq_sta->lq.general_params.start_rate_index[3]);
for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
desc += sprintf(buff+desc, " rate[%d] 0x%X\n",
i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags));
for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
index = iwl_hwrate_to_plcp_idx(
le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags));
if (is_legacy(tbl->lq_type)) {
desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n",
i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags),
iwl_rate_mcs[index].mbps);
} else {
desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n",
i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags),
iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs);
}
}
ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc);
kfree(buff);

7
drivers/net/wireless/iwlwifi/iwl-agn-rs.h
View File

@ -325,6 +325,13 @@ enum iwl_table_type {
#define ANT_BC (ANT_B | ANT_C)
#define ANT_ABC (ANT_AB | ANT_C)
#define IWL_MAX_MCS_DISPLAY_SIZE 12
struct iwl_rate_mcs_info {
char mbps[IWL_MAX_MCS_DISPLAY_SIZE];
char mcs[IWL_MAX_MCS_DISPLAY_SIZE];
};
static inline u8 num_of_ant(u8 mask)
{
return !!((mask) & ANT_A) +