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iwlwifi: mvm: rs: don't clear persistent fields 

iwl_mvm_rs_rate_init() is called multiple times to re-init
the rate scaling statistics (e.g. after some idle time).

It clears all the lq_sta sta, including some fields that
shouldn't be cleared (e.g. debugfs pointers). Fix it
by adding a new 'persistent' sub-struct, and
avoid clearing it on (re-)init.

Move the initialization of the persistent fields to
rs_alloc_sta instead.

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Eliad Peller 2014-06-11 15:51:33 +03:00 committed by Emmanuel Grumbach
parent bdce40f006
commit ae969afe43
2 changed files with 59 additions and 52 deletions
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87
drivers/net/wireless/iwlwifi/mvm/rs.c
View File

@ -927,7 +927,7 @@ static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta,
u8 low;
u16 high_low;
u16 rate_mask;
struct iwl_mvm *mvm = lq_sta->drv;
struct iwl_mvm *mvm = lq_sta->pers.drv;
rate_mask = rs_get_supported_rates(lq_sta, rate);
high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask,
@ -946,7 +946,7 @@ static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta,
static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta,
struct rs_rate *rate)
{
struct iwl_mvm *mvm = lq_sta->drv;
struct iwl_mvm *mvm = lq_sta->pers.drv;
if (is_legacy(rate)) {
/* No column to downgrade from Legacy */
@ -1026,14 +1026,14 @@ static void rs_tx_status(void *mvm_r, struct ieee80211_supported_band *sband,
if (!lq_sta) {
IWL_DEBUG_RATE(mvm, "Station rate scaling not created yet.\n");
return;
} else if (!lq_sta->drv) {
} else if (!lq_sta->pers.drv) {
IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n");
return;
}
#ifdef CONFIG_MAC80211_DEBUGFS
/* Disable last tx check if we are debugging with fixed rate */
if (lq_sta->dbg_fixed_rate) {
if (lq_sta->pers.dbg_fixed_rate) {
IWL_DEBUG_RATE(mvm, "Fixed rate. avoid rate scaling\n");
return;
}
@ -1405,7 +1405,7 @@ static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search)
int flush_interval_passed = 0;
struct iwl_mvm *mvm;
mvm = lq_sta->drv;
mvm = lq_sta->pers.drv;
active_tbl = lq_sta->active_tbl;
tbl = &(lq_sta->lq_info[active_tbl]);
@ -1865,11 +1865,11 @@ static bool rs_tpc_perform(struct iwl_mvm *mvm,
int weak_tpt = IWL_INVALID_VALUE, strong_tpt = IWL_INVALID_VALUE;
#ifdef CONFIG_MAC80211_DEBUGFS
if (lq_sta->dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) {
if (lq_sta->pers.dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) {
IWL_DEBUG_RATE(mvm, "fixed tpc: %d\n",
lq_sta->dbg_fixed_txp_reduction);
lq_sta->lq.reduced_tpc = lq_sta->dbg_fixed_txp_reduction;
return cur != lq_sta->dbg_fixed_txp_reduction;
lq_sta->pers.dbg_fixed_txp_reduction);
lq_sta->lq.reduced_tpc = lq_sta->pers.dbg_fixed_txp_reduction;
return cur != lq_sta->pers.dbg_fixed_txp_reduction;
}
#endif
@ -2382,7 +2382,7 @@ static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta,
}
/* Treat uninitialized rate scaling data same as non-existing. */
if (lq_sta && !lq_sta->drv) {
if (lq_sta && !lq_sta->pers.drv) {
IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n");
mvm_sta = NULL;
}
@ -2401,12 +2401,18 @@ static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta,
gfp_t gfp)
{
struct iwl_mvm_sta *sta_priv = (struct iwl_mvm_sta *)sta->drv_priv;
struct iwl_op_mode *op_mode __maybe_unused =
(struct iwl_op_mode *)mvm_rate;
struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode);
struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate;
struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta;
IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
lq_sta->pers.drv = mvm;
#ifdef CONFIG_MAC80211_DEBUGFS
lq_sta->pers.dbg_fixed_rate = 0;
lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID;
#endif
return &sta_priv->lq_sta;
}
@ -2552,7 +2558,9 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
sta_priv = (struct iwl_mvm_sta *)sta->drv_priv;
lq_sta = &sta_priv->lq_sta;
memset(lq_sta, 0, sizeof(*lq_sta));
/* clear all non-persistent lq data */
memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));
sband = hw->wiphy->bands[band];
@ -2630,17 +2638,12 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
/* as default allow aggregation for all tids */
lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;
lq_sta->drv = mvm;
/* Set last_txrate_idx to lowest rate */
lq_sta->last_txrate_idx = rate_lowest_index(sband, sta);
if (sband->band == IEEE80211_BAND_5GHZ)
lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
lq_sta->is_agg = 0;
#ifdef CONFIG_MAC80211_DEBUGFS
lq_sta->dbg_fixed_rate = 0;
lq_sta->dbg_fixed_txp_reduction = TPC_INVALID;
#endif
#ifdef CONFIG_IWLWIFI_DEBUGFS
iwl_mvm_reset_frame_stats(mvm, &mvm->drv_rx_stats);
#endif
@ -2811,12 +2814,12 @@ static void rs_fill_lq_cmd(struct iwl_mvm *mvm,
u8 ant = initial_rate->ant;
#ifdef CONFIG_MAC80211_DEBUGFS
if (lq_sta->dbg_fixed_rate) {
if (lq_sta->pers.dbg_fixed_rate) {
rs_build_rates_table_from_fixed(mvm, lq_cmd,
lq_sta->band,
lq_sta->dbg_fixed_rate);
lq_sta->pers.dbg_fixed_rate);
lq_cmd->reduced_tpc = 0;
ant = (lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) >>
ant = (lq_sta->pers.dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) >>
RATE_MCS_ANT_POS;
} else
#endif
@ -2926,14 +2929,14 @@ static void rs_program_fix_rate(struct iwl_mvm *mvm,
lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */
IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n",
lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate);
lq_sta->lq.sta_id, lq_sta->pers.dbg_fixed_rate);
if (lq_sta->dbg_fixed_rate) {
if (lq_sta->pers.dbg_fixed_rate) {
struct rs_rate rate;
rs_rate_from_ucode_rate(lq_sta->dbg_fixed_rate,
rs_rate_from_ucode_rate(lq_sta->pers.dbg_fixed_rate,
lq_sta->band, &rate);
rs_fill_lq_cmd(mvm, NULL, lq_sta, &rate);
iwl_mvm_send_lq_cmd(lq_sta->drv, &lq_sta->lq, false);
iwl_mvm_send_lq_cmd(lq_sta->pers.drv, &lq_sta->lq, false);
}
}
@ -2946,16 +2949,16 @@ static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file,
size_t buf_size;
u32 parsed_rate;
mvm = lq_sta->drv;
mvm = lq_sta->pers.drv;
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)
lq_sta->dbg_fixed_rate = parsed_rate;
lq_sta->pers.dbg_fixed_rate = parsed_rate;
else
lq_sta->dbg_fixed_rate = 0;
lq_sta->pers.dbg_fixed_rate = 0;
rs_program_fix_rate(mvm, lq_sta);
@ -2974,7 +2977,7 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
struct iwl_mvm *mvm;
struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
struct rs_rate *rate = &tbl->rate;
mvm = lq_sta->drv;
mvm = lq_sta->pers.drv;
buff = kmalloc(2048, GFP_KERNEL);
if (!buff)
return -ENOMEM;
@ -2984,7 +2987,7 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
lq_sta->total_failed, lq_sta->total_success,
lq_sta->active_legacy_rate);
desc += sprintf(buff+desc, "fixed rate 0x%X\n",
lq_sta->dbg_fixed_rate);
lq_sta->pers.dbg_fixed_rate);
desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n",
(mvm->fw->valid_tx_ant & ANT_A) ? "ANT_A," : "",
(mvm->fw->valid_tx_ant & ANT_B) ? "ANT_B," : "",
@ -3182,31 +3185,31 @@ static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops = {
static void rs_add_debugfs(void *mvm, void *mvm_sta, struct dentry *dir)
{
struct iwl_lq_sta *lq_sta = mvm_sta;
lq_sta->rs_sta_dbgfs_scale_table_file =
lq_sta->pers.rs_sta_dbgfs_scale_table_file =
debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir,
lq_sta, &rs_sta_dbgfs_scale_table_ops);
lq_sta->rs_sta_dbgfs_stats_table_file =
lq_sta->pers.rs_sta_dbgfs_stats_table_file =
debugfs_create_file("rate_stats_table", S_IRUSR, dir,
lq_sta, &rs_sta_dbgfs_stats_table_ops);
lq_sta->rs_sta_dbgfs_drv_tx_stats_file =
lq_sta->pers.rs_sta_dbgfs_drv_tx_stats_file =
debugfs_create_file("drv_tx_stats", S_IRUSR | S_IWUSR, dir,
lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops);
lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file =
lq_sta->pers.rs_sta_dbgfs_tx_agg_tid_en_file =
debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir,
&lq_sta->tx_agg_tid_en);
lq_sta->rs_sta_dbgfs_reduced_txp_file =
lq_sta->pers.rs_sta_dbgfs_reduced_txp_file =
debugfs_create_u8("reduced_tpc", S_IRUSR | S_IWUSR, dir,
&lq_sta->dbg_fixed_txp_reduction);
&lq_sta->pers.dbg_fixed_txp_reduction);
}
static void rs_remove_debugfs(void *mvm, void *mvm_sta)
{
struct iwl_lq_sta *lq_sta = mvm_sta;
debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file);
debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file);
debugfs_remove(lq_sta->rs_sta_dbgfs_drv_tx_stats_file);
debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file);
debugfs_remove(lq_sta->rs_sta_dbgfs_reduced_txp_file);
debugfs_remove(lq_sta->pers.rs_sta_dbgfs_scale_table_file);
debugfs_remove(lq_sta->pers.rs_sta_dbgfs_stats_table_file);
debugfs_remove(lq_sta->pers.rs_sta_dbgfs_drv_tx_stats_file);
debugfs_remove(lq_sta->pers.rs_sta_dbgfs_tx_agg_tid_en_file);
debugfs_remove(lq_sta->pers.rs_sta_dbgfs_reduced_txp_file);
}
#endif

24
drivers/net/wireless/iwlwifi/mvm/rs.h
View File

@ -349,16 +349,6 @@ struct iwl_lq_sta {
struct iwl_lq_cmd lq;
struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
u8 tx_agg_tid_en;
#ifdef CONFIG_MAC80211_DEBUGFS
struct dentry *rs_sta_dbgfs_scale_table_file;
struct dentry *rs_sta_dbgfs_stats_table_file;
struct dentry *rs_sta_dbgfs_drv_tx_stats_file;
struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file;
struct dentry *rs_sta_dbgfs_reduced_txp_file;
u32 dbg_fixed_rate;
u8 dbg_fixed_txp_reduction;
#endif
struct iwl_mvm *drv;
/* used to be in sta_info */
int last_txrate_idx;
@ -369,6 +359,20 @@ struct iwl_lq_sta {
/* tx power reduce for this sta */
int tpc_reduce;
/* persistent fields - initialized only once - keep last! */
struct {
#ifdef CONFIG_MAC80211_DEBUGFS
struct dentry *rs_sta_dbgfs_scale_table_file;
struct dentry *rs_sta_dbgfs_stats_table_file;
struct dentry *rs_sta_dbgfs_drv_tx_stats_file;
struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file;
struct dentry *rs_sta_dbgfs_reduced_txp_file;
u32 dbg_fixed_rate;
u8 dbg_fixed_txp_reduction;
#endif
struct iwl_mvm *drv;
} pers;
};
/* Initialize station's rate scaling information after adding station */