[PATCH 04/14] iwlwifi: Thermal Throttling Management - part 2

Reinette Chatre
2009-07-24T18:13:16Z

From: Wey-Yi Guy <wey-yi.w.guy@intel.com>

Part 2 of Thermal Throttling Management -

Thermal Throttling feature is used to put NIC into low power state when
driver detect the Radio temperature reach pre-defined threshold

Two Thermal Throttling Management Methods; this patch introduce the
Advance Thermal Throttling:
TI-0: system power index, no tx/rx restriction, HT enabled
TI-1: power index 5, 1 spatial stream Tx, multiple spatial stream Rx, HT
enabled
TI-2: power index 5: 1 spatial stream Tx, 1 spatial stream Rx, HT
disabled
TI-CT-KILL: power index 5, no Tx, no Rx, HT disabled

For advance Thermal Throttling, CT_KILL_ENTER threshold and CT_KILL_EXIT
threshold are different; uCode will not stay awake until reach
CT_KILL_EXIT threshold.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
---
drivers/net/wireless/iwlwifi/iwl-agn-rs.c | 48 ++++-
drivers/net/wireless/iwlwifi/iwl-power.c | 285 ++++++++++++++++++++++++++++-
drivers/net/wireless/iwlwifi/iwl-power.h | 51 +++++
3 files changed, 371 insertions(+), 13 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index 40207da..52a4810 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -177,7 +177,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
struct sk_buff *skb,
struct ieee80211_sta *sta,
struct iwl_lq_sta *lq_sta);
-static void rs_fill_link_cmd(const struct iwl_priv *priv,
+static void rs_fill_link_cmd(struct iwl_priv *priv,
struct iwl_lq_sta *lq_sta, u32 rate_n_flags);

@@ -1398,6 +1398,12 @@ static int rs_move_legacy_other(struct iwl_priv *priv,
int ret = 0;
u8 update_search_tbl_counter = 0;

+ if (!iwl_ht_enabled(priv))
+ /* stay in Legacy */
+ tbl->action = IWL_LEGACY_SWITCH_ANTENNA1;
+ else if (iwl_tx_ant_restriction(priv) == IWL_TX_SINGLE &&
+ tbl->action > IWL_LEGACY_SWITCH_SISO)
+ tbl->action = IWL_LEGACY_SWITCH_SISO;
for (; ;) {
lq_sta->action_counter++;
switch (tbl->action) {
@@ -1529,6 +1535,11 @@ static int rs_move_siso_to_other(struct iwl_priv *priv,
u8 update_search_tbl_counter = 0;
int ret;

+ if (iwl_tx_ant_restriction(priv) == IWL_TX_SINGLE &&
+ tbl->action > IWL_SISO_SWITCH_ANTENNA2) {
+ /* stay in SISO */
+ tbl->action = IWL_SISO_SWITCH_ANTENNA1;
+ }
for (;;) {
lq_sta->action_counter++;
switch (tbl->action) {
@@ -1663,6 +1674,12 @@ static int rs_move_mimo2_to_other(struct iwl_priv *priv,
u8 update_search_tbl_counter = 0;
int ret;

+ if ((iwl_tx_ant_restriction(priv) == IWL_TX_SINGLE) &&
+ (tbl->action < IWL_MIMO2_SWITCH_SISO_A ||
+ tbl->action > IWL_MIMO2_SWITCH_SISO_C)) {
+ /* switch in SISO */
+ tbl->action = IWL_MIMO2_SWITCH_SISO_A;
+ }
for (;;) {
lq_sta->action_counter++;
switch (tbl->action) {
@@ -1799,6 +1816,12 @@ static int rs_move_mimo3_to_other(struct iwl_priv *priv,
int ret;
u8 update_search_tbl_counter = 0;

+ if ((iwl_tx_ant_restriction(priv) == IWL_TX_SINGLE) &&
+ (tbl->action < IWL_MIMO3_SWITCH_SISO_A ||
+ tbl->action > IWL_MIMO3_SWITCH_SISO_C)) {
+ /* switch in SISO */
+ tbl->action = IWL_MIMO3_SWITCH_SISO_A;
+ }
for (;;) {
lq_sta->action_counter++;
switch (tbl->action) {
@@ -2178,8 +2201,8 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
tbl->expected_tpt[index] + 64) / 128));

/* If we are searching for better modulation mode, check success. */
- if (lq_sta->search_better_tbl) {
-
+ if (lq_sta->search_better_tbl &&
+ (iwl_tx_ant_restriction(priv) == IWL_TX_MULTI)) {
/* If good success, continue using the "search" mode;
* no need to send new link quality command, since we're
* continuing to use the setup that we've been trying. */
@@ -2307,7 +2330,11 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
((sr > IWL_RATE_HIGH_TH) ||
(current_tpt > (100 * tbl->expected_tpt[low]))))
scale_action = 0;
-
+ if (!iwl_ht_enabled(priv) && !is_legacy(tbl->lq_type))
+ scale_action = -1;
+ if (iwl_tx_ant_restriction(priv) != IWL_TX_MULTI &&
+ (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type)))
+ scale_action = -1;
switch (scale_action) {
case -1:
/* Decrease starting rate, update uCode's rate table */
@@ -2341,9 +2368,11 @@ lq_update:
rate = rs_update_rate_tbl(priv, lq_sta,
tbl, index, is_green);

- /* Should we stay with this modulation mode, or search for a new one? */
- rs_stay_in_table(lq_sta);
-
+ if (iwl_tx_ant_restriction(priv) == IWL_TX_MULTI) {
+ /* Should we stay with this modulation mode,
+ * or search for a new one? */
+ rs_stay_in_table(lq_sta);
+ }
/*
* Search for new modulation mode if we're:
* 1) Not changing rates right now
@@ -2400,7 +2429,8 @@ lq_update:
* have been tried and compared, stay in this best modulation
* mode for a while before next round of mode comparisons. */
if (lq_sta->enable_counter &&
- (lq_sta->action_counter >= tbl1->max_search)) {
+ (lq_sta->action_counter >= tbl1->max_search) &&
+ iwl_ht_enabled(priv)) {
if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) &&
(lq_sta->tx_agg_tid_en & (1 << tid)) &&
(tid != MAX_TID_COUNT)) {
@@ -2686,7 +2716,7 @@ static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband,
rs_initialize_lq(priv, conf, sta, lq_sta);
}

-static void rs_fill_link_cmd(const struct iwl_priv *priv,
+static void rs_fill_link_cmd(struct iwl_priv *priv,
struct iwl_lq_sta *lq_sta, u32 new_rate)
{
struct iwl_scale_tbl_info tbl_type;
diff --git a/drivers/net/wireless/iwlwifi/iwl-power.c b/drivers/net/wireless/iwlwifi/iwl-power.c
index d7fdb58..00937b3 100644
--- a/drivers/net/wireless/iwlwifi/iwl-power.c
+++ b/drivers/net/wireless/iwlwifi/iwl-power.c
@@ -98,6 +98,45 @@ static const struct iwl_power_vec_entry range_2[IWL_POWER_NUM] = {
{{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
};

+/* default Thermal Throttling transaction table
+ * Current state | Throttling Down | Throttling Up
+ *=============================================================================
+ * Condition Nxt State Condition Nxt State Condition Nxt State
+ *-----------------------------------------------------------------------------
+ * IWL_TI_0 T >= 115 CT_KILL 115>T>=105 TI_1 N/A N/A
+ * IWL_TI_1 T >= 115 CT_KILL 115>T>=110 TI_2 T<=95 TI_0
+ * IWL_TI_2 T >= 115 CT_KILL T<=100 TI_1
+ * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
+ *=============================================================================
+ */
+static const struct iwl_tt_trans tt_range_0[IWL_TI_STATE_MAX - 1] = {
+ {IWL_TI_0, IWL_ABSOLUTE_ZERO, 104},
+ {IWL_TI_1, 105, CT_KILL_THRESHOLD},
+ {IWL_TI_CT_KILL, CT_KILL_THRESHOLD + 1, IWL_ABSOLUTE_MAX}
+};
+static const struct iwl_tt_trans tt_range_1[IWL_TI_STATE_MAX - 1] = {
+ {IWL_TI_0, IWL_ABSOLUTE_ZERO, 95},
+ {IWL_TI_2, 110, CT_KILL_THRESHOLD},
+ {IWL_TI_CT_KILL, CT_KILL_THRESHOLD + 1, IWL_ABSOLUTE_MAX}
+};
+static const struct iwl_tt_trans tt_range_2[IWL_TI_STATE_MAX - 1] = {
+ {IWL_TI_1, IWL_ABSOLUTE_ZERO, 100},
+ {IWL_TI_CT_KILL, CT_KILL_THRESHOLD + 1, IWL_ABSOLUTE_MAX},
+ {IWL_TI_CT_KILL, CT_KILL_THRESHOLD + 1, IWL_ABSOLUTE_MAX}
+};
+static const struct iwl_tt_trans tt_range_3[IWL_TI_STATE_MAX - 1] = {
+ {IWL_TI_0, IWL_ABSOLUTE_ZERO, CT_KILL_EXIT_THRESHOLD},
+ {IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX},
+ {IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX}
+};
+
+/* Advance Thermal Throttling default restriction table */
+static const struct iwl_tt_restriction restriction_range[IWL_TI_STATE_MAX] = {
+ {IWL_TX_MULTI, true, IWL_RX_MULTI},
+ {IWL_TX_SINGLE, true, IWL_RX_MULTI},
+ {IWL_TX_SINGLE, false, IWL_RX_SINGLE},
+ {IWL_TX_NONE, false, IWL_RX_NONE}
+};

/* set card power command */
static int iwl_set_power(struct iwl_priv *priv, void *cmd)
@@ -273,6 +312,42 @@ int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode)
}
EXPORT_SYMBOL(iwl_power_set_user_mode);

+bool iwl_ht_enabled(struct iwl_priv *priv)
+{
+ struct iwl_tt_mgmt *tt = &priv->power_data.tt;
+ struct iwl_tt_restriction *restriction;
+
+ if (!priv->power_data.adv_tt)
+ return true;
+ restriction = tt->restriction + tt->state;
+ return restriction->is_ht;
+}
+EXPORT_SYMBOL(iwl_ht_enabled);
+
+u8 iwl_tx_ant_restriction(struct iwl_priv *priv)
+{
+ struct iwl_tt_mgmt *tt = &priv->power_data.tt;
+ struct iwl_tt_restriction *restriction;
+
+ if (!priv->power_data.adv_tt)
+ return IWL_TX_MULTI;
+ restriction = tt->restriction + tt->state;
+ return restriction->tx_stream;
+}
+EXPORT_SYMBOL(iwl_tx_ant_restriction);
+
+u8 iwl_rx_ant_restriction(struct iwl_priv *priv)
+{
+ struct iwl_tt_mgmt *tt = &priv->power_data.tt;
+ struct iwl_tt_restriction *restriction;
+
+ if (!priv->power_data.adv_tt)
+ return IWL_RX_MULTI;
+ restriction = tt->restriction + tt->state;
+ return restriction->rx_stream;
+}
+EXPORT_SYMBOL(iwl_rx_ant_restriction);
+
#define CT_KILL_EXIT_DURATION (5) /* 5 seconds duration */

/*
@@ -427,12 +502,147 @@ static void iwl_legacy_tt_handler(struct iwl_priv *priv, s32 temp)
}
}

+/*
+ * Advance thermal throttling
+ * 1) Avoid NIC destruction due to high temperatures
+ * Chip will identify dangerously high temperatures that can
+ * harm the device and will power down
+ * 2) Avoid the NIC power down due to high temperature
+ * Throttle early enough to lower the power consumption before
+ * drastic steps are needed
+ * Actions include relaxing the power down sleep thresholds and
+ * decreasing the number of TX streams
+ * 3) Avoid throughput performance impact as much as possible
+ *
+ *=============================================================================
+ * Condition Nxt State Condition Nxt State Condition Nxt State
+ *-----------------------------------------------------------------------------
+ * IWL_TI_0 T >= 115 CT_KILL 115>T>=105 TI_1 N/A N/A
+ * IWL_TI_1 T >= 115 CT_KILL 115>T>=110 TI_2 T<=95 TI_0
+ * IWL_TI_2 T >= 115 CT_KILL T<=100 TI_1
+ * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
+ *=============================================================================
+ */
+static void iwl_advance_tt_handler(struct iwl_priv *priv, s32 temp)
+{
+ struct iwl_tt_mgmt *tt = &priv->power_data.tt;
+ int i;
+ bool changed = false;
+ enum iwl_tt_state old_state;
+ struct iwl_tt_trans *transaction;
+
+ old_state = tt->state;
+ for (i = 0; i < IWL_TI_STATE_MAX - 1; i++) {
+ /* based on the current TT state,
+ * find the curresponding transaction table
+ * each table has (IWL_TI_STATE_MAX - 1) entries
+ * tt->transaction + ((old_state * (IWL_TI_STATE_MAX - 1))
+ * will advance to the correct table.
+ * then based on the current temperature
+ * find the next state need to transaction to
+ * go through all the possible (IWL_TI_STATE_MAX - 1) entries
+ * in the current table to see if transaction is needed
+ */
+ transaction = tt->transaction +
+ ((old_state * (IWL_TI_STATE_MAX - 1)) + i);
+ if (temp >= transaction->tt_low &&
+ temp <= transaction->tt_high) {
+#ifdef CONFIG_IWLWIFI_DEBUG
+ if ((tt->tt_previous_temp) &&
+ (temp > tt->tt_previous_temp) &&
+ ((temp - tt->tt_previous_temp) >
+ IWL_TT_INCREASE_MARGIN)) {
+ IWL_DEBUG_POWER(priv,
+ "Temperature increase %d "
+ "degree Celsius\n",
+ (temp - tt->tt_previous_temp));
+ }
+ tt->tt_previous_temp = temp;
+#endif
+ if (old_state !=
+ transaction->next_state) {
+ changed = true;
+ tt->state =
+ transaction->next_state;
+ }
+ break;
+ }
+ }
+ if (changed) {
+ struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
+ struct iwl_power_mgr *setting = &priv->power_data;
+
+ if (tt->state >= IWL_TI_1) {
+ /* if switching from IWL_TI_0 to other TT state
+ * save previous power setting in tt->sys_power_mode */
+ if (old_state == IWL_TI_0)
+ tt->sys_power_mode = setting->power_mode;
+ /* force PI = IWL_POWER_INDEX_5 in the case of TI > 0 */
+ tt->tt_power_mode = IWL_POWER_INDEX_5;
+ if (!iwl_ht_enabled(priv))
+ /* disable HT */
+ rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
+ RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
+ RXON_FLG_FAT_PROT_MSK |
+ RXON_FLG_HT_PROT_MSK);
+ else {
+ /* check HT capability and set
+ * according to the system HT capability
+ * in case get disabled before */
+ iwl_set_rxon_ht(priv, &priv->current_ht_config);
+ }
+
+ } else {
+ /* restore system power setting */
+ /* the previous power mode was saved in
+ * tt->sys_power_mode when system move into
+ * Thermal Throttling state
+ * set power_data.user_power_setting to the previous
+ * system power mode to make sure power will get
+ * updated correctly
+ */
+ priv->power_data.user_power_setting =
+ tt->sys_power_mode;
+ tt->tt_power_mode = tt->sys_power_mode;
+ /* check HT capability and set
+ * according to the system HT capability
+ * in case get disabled before */
+ iwl_set_rxon_ht(priv, &priv->current_ht_config);
+ }
+ if (iwl_power_update_mode(priv, true)) {
+ /* TT state not updated
+ * try again during next temperature read
+ */
+ IWL_ERR(priv, "Cannot update power mode, "
+ "TT state not updated\n");
+ tt->state = old_state;
+ } else {
+ IWL_DEBUG_POWER(priv,
+ "Thermal Throttling to new state: %u\n",
+ tt->state);
+ if (old_state != IWL_TI_CT_KILL &&
+ tt->state == IWL_TI_CT_KILL) {
+ IWL_DEBUG_POWER(priv, "Enter IWL_TI_CT_KILL\n");
+ iwl_perform_ct_kill_task(priv, true);
+
+ } else if (old_state == IWL_TI_CT_KILL &&
+ tt->state != IWL_TI_CT_KILL) {
+ IWL_DEBUG_POWER(priv, "Exit IWL_TI_CT_KILL\n");
+ iwl_perform_ct_kill_task(priv, false);
+ }
+ }
+ }
+}
+
/* Card State Notification indicated reach critical temperature
* if PSP not enable, no Thermal Throttling function will be performed
* just set the GP1 bit to acknowledge the event
* otherwise, go into IWL_TI_CT_KILL state
* since Card State Notification will not provide any temperature reading
+ * for Legacy mode
* so just pass the CT_KILL temperature to iwl_legacy_tt_handler()
+ * for advance mode
+ * pass CT_KILL_THRESHOLD+1 to make sure move into IWL_TI_CT_KILL state
*/
void iwl_tt_enter_ct_kill(struct iwl_priv *priv)
{
@@ -444,7 +654,12 @@ void iwl_tt_enter_ct_kill(struct iwl_priv *priv)
if (tt->state != IWL_TI_CT_KILL) {
IWL_ERR(priv, "Device reached critical temperature "
"- ucode going to sleep!\n");
- iwl_legacy_tt_handler(priv, IWL_MINIMAL_POWER_THRESHOLD);
+ if (!priv->power_data.adv_tt)
+ iwl_legacy_tt_handler(priv,
+ IWL_MINIMAL_POWER_THRESHOLD);
+ else
+ iwl_advance_tt_handler(priv,
+ CT_KILL_THRESHOLD + 1);
}
}
EXPORT_SYMBOL(iwl_tt_enter_ct_kill);
@@ -468,8 +683,11 @@ void iwl_tt_exit_ct_kill(struct iwl_priv *priv)
IWL_ERR(priv,
"Device temperature below critical"
"- ucode awake!\n");
- iwl_legacy_tt_handler(priv,
- IWL_REDUCED_PERFORMANCE_THRESHOLD_2);
+ if (!priv->power_data.adv_tt)
+ iwl_legacy_tt_handler(priv,
+ IWL_REDUCED_PERFORMANCE_THRESHOLD_2);
+ else
+ iwl_advance_tt_handler(priv, CT_KILL_EXIT_THRESHOLD);
}
}
EXPORT_SYMBOL(iwl_tt_exit_ct_kill);
@@ -484,16 +702,24 @@ void iwl_tt_handler(struct iwl_priv *priv)
if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
temp = KELVIN_TO_CELSIUS(priv->temperature);

- iwl_legacy_tt_handler(priv, temp);
+ if (!priv->power_data.adv_tt)
+ iwl_legacy_tt_handler(priv, temp);
+ else
+ iwl_advance_tt_handler(priv, temp);
}
EXPORT_SYMBOL(iwl_tt_handler);

/* Thermal throttling initialization
+ * For advance thermal throttling:
+ * Initialize Thermal Index and temperature threshold table
+ * Initialize thermal throttling restriction table
*/
void iwl_tt_initialize(struct iwl_priv *priv)
{
struct iwl_tt_mgmt *tt = &priv->power_data.tt;
struct iwl_power_mgr *setting = &priv->power_data;
+ int size = sizeof(struct iwl_tt_trans) * (IWL_TI_STATE_MAX - 1);
+ struct iwl_tt_trans *transaction;

IWL_DEBUG_POWER(priv, "Initialize Thermal Throttling \n");

@@ -505,14 +731,65 @@ void iwl_tt_initialize(struct iwl_priv *priv)
init_timer(&priv->power_data.ct_kill_exit_tm);
priv->power_data.ct_kill_exit_tm.data = (unsigned long)priv;
priv->power_data.ct_kill_exit_tm.function = iwl_tt_check_exit_ct_kill;
+ switch (priv->hw_rev & CSR_HW_REV_TYPE_MSK) {
+ case CSR_HW_REV_TYPE_6x00:
+ case CSR_HW_REV_TYPE_6x50:
+ IWL_DEBUG_POWER(priv, "Advanced Thermal Throttling\n");
+ tt->restriction = kzalloc(sizeof(struct iwl_tt_restriction) *
+ IWL_TI_STATE_MAX, GFP_KERNEL);
+ tt->transaction = kzalloc(sizeof(struct iwl_tt_trans) *
+ IWL_TI_STATE_MAX * (IWL_TI_STATE_MAX - 1),
+ GFP_KERNEL);
+ if (!tt->restriction || !tt->transaction) {
+ IWL_ERR(priv, "Fallback to Legacy Throttling\n");
+ priv->power_data.adv_tt = false;
+ kfree(tt->restriction);
+ tt->restriction = NULL;
+ kfree(tt->transaction);
+ tt->transaction = NULL;
+ } else {
+ transaction = tt->transaction +
+ (IWL_TI_0 * (IWL_TI_STATE_MAX - 1));
+ memcpy(transaction, &tt_range_0[0], size);
+ transaction = tt->transaction +
+ (IWL_TI_1 * (IWL_TI_STATE_MAX - 1));
+ memcpy(transaction, &tt_range_1[0], size);
+ transaction = tt->transaction +
+ (IWL_TI_2 * (IWL_TI_STATE_MAX - 1));
+ memcpy(transaction, &tt_range_2[0], size);
+ transaction = tt->transaction +
+ (IWL_TI_CT_KILL * (IWL_TI_STATE_MAX - 1));
+ memcpy(transaction, &tt_range_3[0], size);
+ size = sizeof(struct iwl_tt_restriction) *
+ IWL_TI_STATE_MAX;
+ memcpy(tt->restriction,
+ &restriction_range[0], size);
+ priv->power_data.adv_tt = true;
+ }
+ break;
+ default:
+ IWL_DEBUG_POWER(priv, "Legacy Thermal Throttling\n");
+ priv->power_data.adv_tt = false;
+ break;
+ }
}
EXPORT_SYMBOL(iwl_tt_initialize);

/* cleanup thermal throttling management related memory and timer */
void iwl_tt_exit(struct iwl_priv *priv)
{
+ struct iwl_tt_mgmt *tt = &priv->power_data.tt;
+
/* stop ct_kill_exit_tm timer if activated */
del_timer_sync(&priv->power_data.ct_kill_exit_tm);
+
+ if (priv->power_data.adv_tt) {
+ /* free advance thermal throttling memory */
+ kfree(tt->restriction);
+ tt->restriction = NULL;
+ kfree(tt->transaction);
+ tt->transaction = NULL;
+ }
}
EXPORT_SYMBOL(iwl_tt_exit);

diff --git a/drivers/net/wireless/iwlwifi/iwl-power.h b/drivers/net/wireless/iwlwifi/iwl-power.h
index 7bb10d4..3d49b7a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-power.h
+++ b/drivers/net/wireless/iwlwifi/iwl-power.h
@@ -33,8 +33,18 @@

struct iwl_priv;

+#define IWL_ABSOLUTE_ZERO 0
+#define IWL_ABSOLUTE_MAX 0xFFFFFFFF
#define IWL_TT_INCREASE_MARGIN 5

+/* Tx/Rx restrictions */
+#define IWL_TX_MULTI 0x02
+#define IWL_TX_SINGLE 0x01
+#define IWL_TX_NONE 0x00
+#define IWL_RX_MULTI 0x02
+#define IWL_RX_SINGLE 0x01
+#define IWL_RX_NONE 0x00
+
/* Thermal Throttling State Machine states */
enum iwl_tt_state {
IWL_TI_0, /* normal temperature, system power state */
@@ -45,6 +55,35 @@ enum iwl_tt_state {
};

/**
+ * struct iwl_tt_restriction - Thermal Throttling restriction table used
+ * by advance thermal throttling management
+ * based on the current thermal throttling state, determine
+ * number of tx/rx streams; and the status of HT operation
+ * @tx_stream: number of tx stream allowed
+ * @is_ht: ht enable/disable
+ * @rx_stream: number of rx stream allowed
+ */
+struct iwl_tt_restriction {
+ u8 tx_stream;
+ bool is_ht;
+ u8 rx_stream;
+};
+
+/**
+ * struct iwl_tt_trans - Thermal Throttling transaction table; used by
+ * advance thermal throttling algorithm to determine next
+ * thermal state to go based on the current temperature
+ * @next_state: next thermal throttling mode
+ * @tt_low: low temperature threshold to change state
+ * @tt_high: high temperature threshold to change state
+ */
+struct iwl_tt_trans {
+ enum iwl_tt_state next_state;
+ u32 tt_low;
+ u32 tt_high;
+};
+
+/**
* struct iwl_tt_mgnt - Thermal Throttling Management structure
* @state: current Thermal Throttling state
* @tt_power_mode: Thermal Throttling power mode index
@@ -55,6 +94,11 @@ enum iwl_tt_state {
* @sys_power_mode: previous system power mode
* before transition into TT state
* @tt_previous_temperature: last measured temperature
+ * @iwl_tt_restriction: ptr to restriction tbl, used by advance
+ * thermal throttling to determine how many tx/rx streams
+ * should be used in tt state; and can HT be enabled or not
+ * @iwl_tt_trans: ptr to adv trans table, used by advance thermal throttling
+ * state transaction
*/
struct iwl_tt_mgmt {
enum iwl_tt_state state;
@@ -63,6 +107,8 @@ struct iwl_tt_mgmt {
#ifdef CONFIG_IWLWIFI_DEBUG
s32 tt_previous_temp;
#endif
+ struct iwl_tt_restriction *restriction;
+ struct iwl_tt_trans *transaction;
};

enum {
@@ -92,6 +138,8 @@ struct iwl_power_mgr {
u8 user_power_setting; /* set by user through sysfs */
u8 power_disabled; /* set by mac80211's CONF_PS */
struct iwl_tt_mgmt tt; /* Thermal Throttling Management */
+ bool adv_tt; /* false: legacy mode */
+ /* true: advance mode */
bool ct_kill_toggle; /* use to toggle the CSR bit when
* checking uCode temperature
*/
@@ -100,6 +148,9 @@ struct iwl_power_mgr {

int iwl_power_update_mode(struct iwl_priv *priv, bool force);
int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode);
+bool iwl_ht_enabled(struct iwl_priv *priv);
+u8 iwl_tx_ant_restriction(struct iwl_priv *priv);
+u8 iwl_rx_ant_restriction(struct iwl_priv *priv);
void iwl_tt_enter_ct_kill(struct iwl_priv *priv);
void iwl_tt_exit_ct_kill(struct iwl_priv *priv);
void iwl_tt_handler(struct iwl_priv *priv);
--
1.5.6.3