1 /******************************************************************************
3 * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/slab.h>
33 #include <net/mac80211.h>
35 #include "iwl-debug.h"
36 #include "iwl-trans.h"
37 #include "iwl-modparams.h"
44 * Setting power level allows the card to go to sleep when not busy.
46 * We calculate a sleep command based on the required latency, which
47 * we get from mac80211. In order to handle thermal throttling, we can
48 * also use pre-defined power levels.
52 * This defines the old power levels. They are still used by default
53 * (level 1) and for thermal throttle (levels 3 through 5)
56 struct iwl_power_vec_entry {
57 struct iwl_powertable_cmd cmd;
58 u8 no_dtim; /* number of skip dtim */
61 #define IWL_DTIM_RANGE_0_MAX 2
62 #define IWL_DTIM_RANGE_1_MAX 10
64 #define NOSLP cpu_to_le16(0), 0, 0
65 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
66 #define ASLP (IWL_POWER_POWER_SAVE_ENA_MSK | \
67 IWL_POWER_POWER_MANAGEMENT_ENA_MSK | \
68 IWL_POWER_ADVANCE_PM_ENA_MSK)
69 #define ASLP_TOUT(T) cpu_to_le32(T)
70 #define TU_TO_USEC 1024
71 #define SLP_TOUT(T) cpu_to_le32((T) * TU_TO_USEC)
72 #define SLP_VEC(X0, X1, X2, X3, X4) {cpu_to_le32(X0), \
77 /* default power management (not Tx power) table values */
78 /* for DTIM period 0 through IWL_DTIM_RANGE_0_MAX */
80 static const struct iwl_power_vec_entry range_0[IWL_POWER_NUM] = {
81 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 1, 2, 2, 0xFF)}, 0},
82 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
83 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0},
84 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1},
85 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2}
89 /* for DTIM period IWL_DTIM_RANGE_0_MAX + 1 through IWL_DTIM_RANGE_1_MAX */
91 static const struct iwl_power_vec_entry range_1[IWL_POWER_NUM] = {
92 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
93 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0},
94 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0},
95 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1},
96 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 6, 10, 10)}, 2}
99 /* for DTIM period > IWL_DTIM_RANGE_1_MAX */
101 static const struct iwl_power_vec_entry range_2[IWL_POWER_NUM] = {
102 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
103 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
104 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
105 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
106 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
109 /* advance power management */
111 static const struct iwl_power_vec_entry apm_range_0[IWL_POWER_NUM] = {
112 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
113 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
114 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
115 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
116 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
117 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
118 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
119 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
120 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
121 SLP_VEC(1, 2, 6, 8, 0xFF), ASLP_TOUT(2)}, 2}
125 /* for DTIM period IWL_DTIM_RANGE_0_MAX + 1 through IWL_DTIM_RANGE_1_MAX */
127 static const struct iwl_power_vec_entry apm_range_1[IWL_POWER_NUM] = {
128 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
129 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
130 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
131 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
132 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
133 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
134 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
135 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
136 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
137 SLP_VEC(1, 2, 6, 8, 0xFF), 0}, 2}
140 /* for DTIM period > IWL_DTIM_RANGE_1_MAX */
142 static const struct iwl_power_vec_entry apm_range_2[IWL_POWER_NUM] = {
143 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
144 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
145 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
146 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
147 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
148 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
149 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
150 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
151 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
152 SLP_VEC(1, 2, 6, 8, 0xFF), ASLP_TOUT(2)}, 2}
155 static void iwl_static_sleep_cmd(struct iwl_priv *priv,
156 struct iwl_powertable_cmd *cmd,
157 enum iwl_power_level lvl, int period)
159 const struct iwl_power_vec_entry *table;
160 int max_sleep[IWL_POWER_VEC_SIZE] = { 0 };
165 if (priv->lib->adv_pm) {
167 if (period <= IWL_DTIM_RANGE_1_MAX)
169 if (period <= IWL_DTIM_RANGE_0_MAX)
173 if (period <= IWL_DTIM_RANGE_1_MAX)
175 if (period <= IWL_DTIM_RANGE_0_MAX)
179 if (WARN_ON(lvl < 0 || lvl >= IWL_POWER_NUM))
180 memset(cmd, 0, sizeof(*cmd));
182 *cmd = table[lvl].cmd;
187 for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
191 skip = table[lvl].no_dtim;
192 for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
193 max_sleep[i] = le32_to_cpu(cmd->sleep_interval[i]);
194 max_sleep[IWL_POWER_VEC_SIZE - 1] = skip + 1;
197 slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]);
198 /* figure out the listen interval based on dtim period and skip */
199 if (slp_itrvl == 0xFF)
200 cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] =
201 cpu_to_le32(period * (skip + 1));
203 slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]);
204 if (slp_itrvl > period)
205 cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] =
206 cpu_to_le32((slp_itrvl / period) * period);
209 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
211 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
213 if (priv->cfg->base_params->shadow_reg_enable)
214 cmd->flags |= IWL_POWER_SHADOW_REG_ENA;
216 cmd->flags &= ~IWL_POWER_SHADOW_REG_ENA;
218 if (iwl_advanced_bt_coexist(priv)) {
219 if (!priv->lib->bt_params->bt_sco_disable)
220 cmd->flags |= IWL_POWER_BT_SCO_ENA;
222 cmd->flags &= ~IWL_POWER_BT_SCO_ENA;
226 slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]);
227 if (slp_itrvl > IWL_CONN_MAX_LISTEN_INTERVAL)
228 cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] =
229 cpu_to_le32(IWL_CONN_MAX_LISTEN_INTERVAL);
231 /* enforce max sleep interval */
232 for (i = IWL_POWER_VEC_SIZE - 1; i >= 0 ; i--) {
233 if (le32_to_cpu(cmd->sleep_interval[i]) >
234 (max_sleep[i] * period))
235 cmd->sleep_interval[i] =
236 cpu_to_le32(max_sleep[i] * period);
237 if (i != (IWL_POWER_VEC_SIZE - 1)) {
238 if (le32_to_cpu(cmd->sleep_interval[i]) >
239 le32_to_cpu(cmd->sleep_interval[i+1]))
240 cmd->sleep_interval[i] =
241 cmd->sleep_interval[i+1];
245 if (priv->power_data.bus_pm)
246 cmd->flags |= IWL_POWER_PCI_PM_MSK;
248 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
250 IWL_DEBUG_POWER(priv, "numSkipDtim = %u, dtimPeriod = %d\n",
252 /* The power level here is 0-4 (used as array index), but user expects
253 to see 1-5 (according to spec). */
254 IWL_DEBUG_POWER(priv, "Sleep command for index %d\n", lvl + 1);
257 static void iwl_power_sleep_cam_cmd(struct iwl_priv *priv,
258 struct iwl_powertable_cmd *cmd)
260 memset(cmd, 0, sizeof(*cmd));
262 if (priv->power_data.bus_pm)
263 cmd->flags |= IWL_POWER_PCI_PM_MSK;
265 IWL_DEBUG_POWER(priv, "Sleep command for CAM\n");
268 static int iwl_set_power(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd)
270 IWL_DEBUG_POWER(priv, "Sending power/sleep command\n");
271 IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags);
272 IWL_DEBUG_POWER(priv, "Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
273 IWL_DEBUG_POWER(priv, "Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
274 IWL_DEBUG_POWER(priv, "Sleep interval vector = { %d , %d , %d , %d , %d }\n",
275 le32_to_cpu(cmd->sleep_interval[0]),
276 le32_to_cpu(cmd->sleep_interval[1]),
277 le32_to_cpu(cmd->sleep_interval[2]),
278 le32_to_cpu(cmd->sleep_interval[3]),
279 le32_to_cpu(cmd->sleep_interval[4]));
281 return iwl_dvm_send_cmd_pdu(priv, POWER_TABLE_CMD, 0,
282 sizeof(struct iwl_powertable_cmd), cmd);
285 static void iwl_power_build_cmd(struct iwl_priv *priv,
286 struct iwl_powertable_cmd *cmd)
288 bool enabled = priv->hw->conf.flags & IEEE80211_CONF_PS;
291 dtimper = priv->hw->conf.ps_dtim_period ?: 1;
294 iwl_static_sleep_cmd(priv, cmd, IWL_POWER_INDEX_5, dtimper);
295 else if (!priv->lib->no_idle_support &&
296 priv->hw->conf.flags & IEEE80211_CONF_IDLE)
297 iwl_static_sleep_cmd(priv, cmd, IWL_POWER_INDEX_5, 20);
298 else if (iwl_tt_is_low_power_state(priv)) {
299 /* in thermal throttling low power state */
300 iwl_static_sleep_cmd(priv, cmd,
301 iwl_tt_current_power_mode(priv), dtimper);
303 iwl_power_sleep_cam_cmd(priv, cmd);
304 else if (priv->power_data.debug_sleep_level_override >= 0)
305 iwl_static_sleep_cmd(priv, cmd,
306 priv->power_data.debug_sleep_level_override,
309 /* Note that the user parameter is 1-5 (according to spec),
310 but we pass 0-4 because it acts as an array index. */
311 if (iwlwifi_mod_params.power_level > IWL_POWER_INDEX_1 &&
312 iwlwifi_mod_params.power_level <= IWL_POWER_NUM)
313 iwl_static_sleep_cmd(priv, cmd,
314 iwlwifi_mod_params.power_level - 1, dtimper);
316 iwl_static_sleep_cmd(priv, cmd,
317 IWL_POWER_INDEX_1, dtimper);
321 int iwl_power_set_mode(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd,
327 lockdep_assert_held(&priv->mutex);
329 /* Don't update the RX chain when chain noise calibration is running */
330 update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
331 priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
333 if (!memcmp(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
336 if (!iwl_is_ready_rf(priv))
339 /* scan complete use sleep_power_next, need to be updated */
340 memcpy(&priv->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
341 if (test_bit(STATUS_SCANNING, &priv->status) && !force) {
342 IWL_DEBUG_INFO(priv, "Defer power set mode while scanning\n");
346 if (cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK)
347 iwl_dvm_set_pmi(priv, true);
349 ret = iwl_set_power(priv, cmd);
351 if (!(cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK))
352 iwl_dvm_set_pmi(priv, false);
355 iwl_update_chain_flags(priv);
357 IWL_DEBUG_POWER(priv,
358 "Cannot update the power, chain noise "
359 "calibration running: %d\n",
360 priv->chain_noise_data.state);
362 memcpy(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd));
364 IWL_ERR(priv, "set power fail, ret = %d\n", ret);
369 int iwl_power_update_mode(struct iwl_priv *priv, bool force)
371 struct iwl_powertable_cmd cmd;
373 iwl_power_build_cmd(priv, &cmd);
374 return iwl_power_set_mode(priv, &cmd, force);
377 /* initialize to default */
378 void iwl_power_initialize(struct iwl_priv *priv)
380 priv->power_data.bus_pm = priv->trans->pm_support;
382 priv->power_data.debug_sleep_level_override = -1;
384 memset(&priv->power_data.sleep_cmd, 0,
385 sizeof(priv->power_data.sleep_cmd));