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iwlwifi: mvm: add Rx frames statistics via debugfs

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Collect statistics regarding rates and aggregations in Rx
frames and export the data via debugfs.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Eyal Shapira 2014-01-28 01:35:32 +02:00 committed by Emmanuel Grumbach
parent 1f6bf0786e
commit 5fc0f76c43
4 changed files with 185 additions and 2 deletions
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72
drivers/net/wireless/iwlwifi/mvm/debugfs.c
View File

@ -531,6 +531,76 @@ static ssize_t iwl_dbgfs_fw_rx_stats_read(struct file *file,
}
#undef PRINT_STAT_LE32
static ssize_t iwl_dbgfs_frame_stats_read(struct iwl_mvm *mvm,
char __user *user_buf, size_t count,
loff_t *ppos,
struct iwl_mvm_frame_stats *stats)
{
char *buff;
int pos = 0, idx, i;
int ret;
size_t bufsz = 1024;
buff = kmalloc(bufsz, GFP_KERNEL);
if (!buff)
return -ENOMEM;
spin_lock_bh(&mvm->drv_stats_lock);
pos += scnprintf(buff + pos, bufsz - pos,
"Legacy/HT/VHT\t:\t%d/%d/%d\n",
stats->legacy_frames,
stats->ht_frames,
stats->vht_frames);
pos += scnprintf(buff + pos, bufsz - pos, "20/40/80\t:\t%d/%d/%d\n",
stats->bw_20_frames,
stats->bw_40_frames,
stats->bw_80_frames);
pos += scnprintf(buff + pos, bufsz - pos, "NGI/SGI\t\t:\t%d/%d\n",
stats->ngi_frames,
stats->sgi_frames);
pos += scnprintf(buff + pos, bufsz - pos, "SISO/MIMO2\t:\t%d/%d\n",
stats->siso_frames,
stats->mimo2_frames);
pos += scnprintf(buff + pos, bufsz - pos, "FAIL/SCSS\t:\t%d/%d\n",
stats->fail_frames,
stats->success_frames);
pos += scnprintf(buff + pos, bufsz - pos, "MPDUs agg\t:\t%d\n",
stats->agg_frames);
pos += scnprintf(buff + pos, bufsz - pos, "A-MPDUs\t\t:\t%d\n",
stats->ampdu_count);
pos += scnprintf(buff + pos, bufsz - pos, "Avg MPDUs/A-MPDU:\t%d\n",
stats->ampdu_count > 0 ?
(stats->agg_frames / stats->ampdu_count) : 0);
pos += scnprintf(buff + pos, bufsz - pos, "Last Rates\n");
idx = stats->last_frame_idx - 1;
for (i = 0; i < ARRAY_SIZE(stats->last_rates); i++) {
idx = (idx + 1) % ARRAY_SIZE(stats->last_rates);
if (stats->last_rates[idx] == 0)
continue;
pos += scnprintf(buff + pos, bufsz - pos, "Rate[%d]: ",
(int)(ARRAY_SIZE(stats->last_rates) - i));
pos += rs_pretty_print_rate(buff + pos, stats->last_rates[idx]);
}
spin_unlock_bh(&mvm->drv_stats_lock);
ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos);
kfree(buff);
return ret;
}
static ssize_t iwl_dbgfs_drv_rx_stats_read(struct file *file,
char __user *user_buf, size_t count,
loff_t *ppos)
{
struct iwl_mvm *mvm = file->private_data;
return iwl_dbgfs_frame_stats_read(mvm, user_buf, count, ppos,
&mvm->drv_rx_stats);
}
static ssize_t iwl_dbgfs_fw_restart_write(struct iwl_mvm *mvm, char *buf,
size_t count, loff_t *ppos)
{
@ -959,6 +1029,7 @@ MVM_DEBUGFS_READ_FILE_OPS(bt_notif);
MVM_DEBUGFS_READ_FILE_OPS(bt_cmd);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(disable_power_off, 64);
MVM_DEBUGFS_READ_FILE_OPS(fw_rx_stats);
MVM_DEBUGFS_READ_FILE_OPS(drv_rx_stats);
MVM_DEBUGFS_WRITE_FILE_OPS(fw_restart, 10);
MVM_DEBUGFS_WRITE_FILE_OPS(fw_nmi, 10);
MVM_DEBUGFS_READ_WRITE_FILE_OPS(scan_ant_rxchain, 8);
@ -990,6 +1061,7 @@ int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
MVM_DEBUGFS_ADD_FILE(disable_power_off, mvm->debugfs_dir,
S_IRUSR | S_IWUSR);
MVM_DEBUGFS_ADD_FILE(fw_rx_stats, mvm->debugfs_dir, S_IRUSR);
MVM_DEBUGFS_ADD_FILE(drv_rx_stats, mvm->debugfs_dir, S_IRUSR);
MVM_DEBUGFS_ADD_FILE(fw_restart, mvm->debugfs_dir, S_IWUSR);
MVM_DEBUGFS_ADD_FILE(fw_nmi, mvm->debugfs_dir, S_IWUSR);
MVM_DEBUGFS_ADD_FILE(scan_ant_rxchain, mvm->debugfs_dir,

29
drivers/net/wireless/iwlwifi/mvm/mvm.h
View File

@ -425,6 +425,28 @@ struct iwl_mvm_tt_mgmt {
bool throttle;
};
#define IWL_MVM_NUM_LAST_FRAMES_UCODE_RATES 8
struct iwl_mvm_frame_stats {
u32 legacy_frames;
u32 ht_frames;
u32 vht_frames;
u32 bw_20_frames;
u32 bw_40_frames;
u32 bw_80_frames;
u32 bw_160_frames;
u32 sgi_frames;
u32 ngi_frames;
u32 siso_frames;
u32 mimo2_frames;
u32 agg_frames;
u32 ampdu_count;
u32 success_frames;
u32 fail_frames;
u32 last_rates[IWL_MVM_NUM_LAST_FRAMES_UCODE_RATES];
int last_frame_idx;
};
struct iwl_mvm {
/* for logger access */
struct device *dev;
@ -526,6 +548,9 @@ struct iwl_mvm {
struct debugfs_blob_wrapper nvm_sw_blob;
struct debugfs_blob_wrapper nvm_calib_blob;
struct debugfs_blob_wrapper nvm_prod_blob;
struct iwl_mvm_frame_stats drv_rx_stats;
spinlock_t drv_stats_lock;
#endif
struct iwl_mvm_phy_ctxt phy_ctxts[NUM_PHY_CTX];
@ -810,6 +835,10 @@ iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
/* rate scaling */
int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq, bool init);
void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm,
struct iwl_mvm_frame_stats *stats,
u32 rate, bool agg);
int rs_pretty_print_rate(char *buf, const u32 rate);
/* power management */
int iwl_power_legacy_set_cam_mode(struct iwl_mvm *mvm);

73
drivers/net/wireless/iwlwifi/mvm/rs.c
View File

@ -2240,6 +2240,73 @@ static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta,
}
}
#ifdef CONFIG_IWLWIFI_DEBUGFS
static void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm,
struct iwl_mvm_frame_stats *stats)
{
spin_lock_bh(&mvm->drv_stats_lock);
memset(stats, 0, sizeof(*stats));
spin_unlock_bh(&mvm->drv_stats_lock);
}
void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm,
struct iwl_mvm_frame_stats *stats,
u32 rate, bool agg)
{
u8 nss = 0, mcs = 0;
spin_lock(&mvm->drv_stats_lock);
if (agg)
stats->agg_frames++;
stats->success_frames++;
switch (rate & RATE_MCS_CHAN_WIDTH_MSK) {
case RATE_MCS_CHAN_WIDTH_20:
stats->bw_20_frames++;
break;
case RATE_MCS_CHAN_WIDTH_40:
stats->bw_40_frames++;
break;
case RATE_MCS_CHAN_WIDTH_80:
stats->bw_80_frames++;
break;
default:
WARN_ONCE(1, "bad BW. rate 0x%x", rate);
}
if (rate & RATE_MCS_HT_MSK) {
stats->ht_frames++;
mcs = rate & RATE_HT_MCS_RATE_CODE_MSK;
nss = ((rate & RATE_HT_MCS_NSS_MSK) >> RATE_HT_MCS_NSS_POS) + 1;
} else if (rate & RATE_MCS_VHT_MSK) {
stats->vht_frames++;
mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK;
nss = ((rate & RATE_VHT_MCS_NSS_MSK) >>
RATE_VHT_MCS_NSS_POS) + 1;
} else {
stats->legacy_frames++;
}
if (nss == 1)
stats->siso_frames++;
else if (nss == 2)
stats->mimo2_frames++;
if (rate & RATE_MCS_SGI_MSK)
stats->sgi_frames++;
else
stats->ngi_frames++;
stats->last_rates[stats->last_frame_idx] = rate;
stats->last_frame_idx = (stats->last_frame_idx + 1) %
ARRAY_SIZE(stats->last_rates);
spin_unlock(&mvm->drv_stats_lock);
}
#endif
/*
* Called after adding a new station to initialize rate scaling
*/
@ -2334,7 +2401,9 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
#ifdef CONFIG_MAC80211_DEBUGFS
lq_sta->dbg_fixed_rate = 0;
#endif
#ifdef CONFIG_IWLWIFI_DEBUGFS
iwl_mvm_reset_frame_stats(mvm, &mvm->drv_rx_stats);
#endif
rs_initialize_lq(mvm, sta, lq_sta, band, init);
}
@ -2546,7 +2615,7 @@ static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta,
}
#ifdef CONFIG_MAC80211_DEBUGFS
static int rs_pretty_print_rate(char *buf, const u32 rate)
int rs_pretty_print_rate(char *buf, const u32 rate)
{
char *type, *bw;

13
drivers/net/wireless/iwlwifi/mvm/rx.c
View File

@ -77,6 +77,15 @@ int iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
mvm->ampdu_ref++;
#ifdef CONFIG_IWLWIFI_DEBUGFS
if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
spin_lock(&mvm->drv_stats_lock);
mvm->drv_rx_stats.ampdu_count++;
spin_unlock(&mvm->drv_stats_lock);
}
#endif
return 0;
}
@ -391,6 +400,10 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
rx_status.band);
}
#ifdef CONFIG_IWLWIFI_DEBUGFS
iwl_mvm_update_frame_stats(mvm, &mvm->drv_rx_stats, rate_n_flags,
rx_status.flag & RX_FLAG_AMPDU_DETAILS);
#endif
iwl_mvm_pass_packet_to_mac80211(mvm, hdr, len, ampdu_status,
rxb, &rx_status);
return 0;