iwlwifi: move DVM code into subdirectory

Since we're working on another mode/driver
inside iwlwifi, move the current one into a
subdirectory to more cleanly separate the
code. While at it, rename all the files.

Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 388 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/dvm/power.c b/drivers/net/wireless/iwlwifi/dvm/power.c
new file mode 100644
index 000000000000..72c940759ac7
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/dvm/power.c
@@ -0,0 +1,388 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2007 - 2012 Intel Corporation. All rights reserved.
+ *
+ * Portions of this file are derived from the ipw3945 project, as well
+ * as portions of the ieee80211 subsystem header files.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *****************************************************************************/
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <net/mac80211.h>
+#include "iwl-io.h"
+#include "iwl-debug.h"
+#include "iwl-trans.h"
+#include "iwl-modparams.h"
+#include "eeprom.h"
+#include "dev.h"
+#include "agn.h"
+#include "commands.h"
+#include "power.h"
+
+/*
+ * Setting power level allows the card to go to sleep when not busy.
+ *
+ * We calculate a sleep command based on the required latency, which
+ * we get from mac80211. In order to handle thermal throttling, we can
+ * also use pre-defined power levels.
+ */
+
+/*
+ * This defines the old power levels. They are still used by default
+ * (level 1) and for thermal throttle (levels 3 through 5)
+ */
+
+struct iwl_power_vec_entry {
+        struct iwl_powertable_cmd cmd;
+        u8 no_dtim;     /* number of skip dtim */
+};
+
+#define IWL_DTIM_RANGE_0_MAX    2
+#define IWL_DTIM_RANGE_1_MAX    10
+
+#define NOSLP cpu_to_le16(0), 0, 0
+#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
+#define ASLP (IWL_POWER_POWER_SAVE_ENA_MSK |    \
+                IWL_POWER_POWER_MANAGEMENT_ENA_MSK | \
+                IWL_POWER_ADVANCE_PM_ENA_MSK)
+#define ASLP_TOUT(T) cpu_to_le32(T)
+#define TU_TO_USEC 1024
+#define SLP_TOUT(T) cpu_to_le32((T) * TU_TO_USEC)
+#define SLP_VEC(X0, X1, X2, X3, X4) {cpu_to_le32(X0), \
+                                     cpu_to_le32(X1), \
+                                     cpu_to_le32(X2), \
+                                     cpu_to_le32(X3), \
+                                     cpu_to_le32(X4)}
+/* default power management (not Tx power) table values */
+/* for DTIM period 0 through IWL_DTIM_RANGE_0_MAX */
+/* DTIM 0 - 2 */
+static const struct iwl_power_vec_entry range_0[IWL_POWER_NUM] = {
+        {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 1, 2, 2, 0xFF)}, 0},
+        {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
+        {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0},
+        {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1},
+        {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2}
+};
+
+
+/* for DTIM period IWL_DTIM_RANGE_0_MAX + 1 through IWL_DTIM_RANGE_1_MAX */
+/* DTIM 3 - 10 */
+static const struct iwl_power_vec_entry range_1[IWL_POWER_NUM] = {
+        {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
+        {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0},
+        {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0},
+        {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1},
+        {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 6, 10, 10)}, 2}
+};
+
+/* for DTIM period > IWL_DTIM_RANGE_1_MAX */
+/* DTIM 11 - */
+static const struct iwl_power_vec_entry range_2[IWL_POWER_NUM] = {
+        {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
+        {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
+        {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
+        {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
+        {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
+};
+
+/* advance power management */
+/* DTIM 0 - 2 */
+static const struct iwl_power_vec_entry apm_range_0[IWL_POWER_NUM] = {
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 6, 8, 0xFF), ASLP_TOUT(2)}, 2}
+};
+
+
+/* for DTIM period IWL_DTIM_RANGE_0_MAX + 1 through IWL_DTIM_RANGE_1_MAX */
+/* DTIM 3 - 10 */
+static const struct iwl_power_vec_entry apm_range_1[IWL_POWER_NUM] = {
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 6, 8, 0xFF), 0}, 2}
+};
+
+/* for DTIM period > IWL_DTIM_RANGE_1_MAX */
+/* DTIM 11 - */
+static const struct iwl_power_vec_entry apm_range_2[IWL_POWER_NUM] = {
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0},
+        {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50),
+                SLP_VEC(1, 2, 6, 8, 0xFF), ASLP_TOUT(2)}, 2}
+};
+
+static void iwl_static_sleep_cmd(struct iwl_priv *priv,
+                                 struct iwl_powertable_cmd *cmd,
+                                 enum iwl_power_level lvl, int period)
+{
+        const struct iwl_power_vec_entry *table;
+        int max_sleep[IWL_POWER_VEC_SIZE] = { 0 };
+        int i;
+        u8 skip;
+        u32 slp_itrvl;
+
+        if (priv->cfg->adv_pm) {
+                table = apm_range_2;
+                if (period <= IWL_DTIM_RANGE_1_MAX)
+                        table = apm_range_1;
+                if (period <= IWL_DTIM_RANGE_0_MAX)
+                        table = apm_range_0;
+        } else {
+                table = range_2;
+                if (period <= IWL_DTIM_RANGE_1_MAX)
+                        table = range_1;
+                if (period <= IWL_DTIM_RANGE_0_MAX)
+                        table = range_0;
+        }
+
+        if (WARN_ON(lvl < 0 || lvl >= IWL_POWER_NUM))
+                memset(cmd, 0, sizeof(*cmd));
+        else
+                *cmd = table[lvl].cmd;
+
+        if (period == 0) {
+                skip = 0;
+                period = 1;
+                for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
+                        max_sleep[i] =  1;
+
+        } else {
+                skip = table[lvl].no_dtim;
+                for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
+                        max_sleep[i] = le32_to_cpu(cmd->sleep_interval[i]);
+                max_sleep[IWL_POWER_VEC_SIZE - 1] = skip + 1;
+        }
+
+        slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]);
+        /* figure out the listen interval based on dtim period and skip */
+        if (slp_itrvl == 0xFF)
+                cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] =
+                        cpu_to_le32(period * (skip + 1));
+
+        slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]);
+        if (slp_itrvl > period)
+                cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] =
+                        cpu_to_le32((slp_itrvl / period) * period);
+
+        if (skip)
+                cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
+        else
+                cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
+
+        if (priv->cfg->base_params->shadow_reg_enable)
+                cmd->flags |= IWL_POWER_SHADOW_REG_ENA;
+        else
+                cmd->flags &= ~IWL_POWER_SHADOW_REG_ENA;
+
+        if (iwl_advanced_bt_coexist(priv)) {
+                if (!priv->cfg->bt_params->bt_sco_disable)
+                        cmd->flags |= IWL_POWER_BT_SCO_ENA;
+                else
+                        cmd->flags &= ~IWL_POWER_BT_SCO_ENA;
+        }
+
+
+        slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]);
+        if (slp_itrvl > IWL_CONN_MAX_LISTEN_INTERVAL)
+                cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] =
+                        cpu_to_le32(IWL_CONN_MAX_LISTEN_INTERVAL);
+
+        /* enforce max sleep interval */
+        for (i = IWL_POWER_VEC_SIZE - 1; i >= 0 ; i--) {
+                if (le32_to_cpu(cmd->sleep_interval[i]) >
+                    (max_sleep[i] * period))
+                        cmd->sleep_interval[i] =
+                                cpu_to_le32(max_sleep[i] * period);
+                if (i != (IWL_POWER_VEC_SIZE - 1)) {
+                        if (le32_to_cpu(cmd->sleep_interval[i]) >
+                            le32_to_cpu(cmd->sleep_interval[i+1]))
+                                cmd->sleep_interval[i] =
+                                        cmd->sleep_interval[i+1];
+                }
+        }
+
+        if (priv->power_data.bus_pm)
+                cmd->flags |= IWL_POWER_PCI_PM_MSK;
+        else
+                cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
+
+        IWL_DEBUG_POWER(priv, "numSkipDtim = %u, dtimPeriod = %d\n",
+                        skip, period);
+        /* The power level here is 0-4 (used as array index), but user expects
+        to see 1-5 (according to spec). */
+        IWL_DEBUG_POWER(priv, "Sleep command for index %d\n", lvl + 1);
+}
+
+static void iwl_power_sleep_cam_cmd(struct iwl_priv *priv,
+                                    struct iwl_powertable_cmd *cmd)
+{
+        memset(cmd, 0, sizeof(*cmd));
+
+        if (priv->power_data.bus_pm)
+                cmd->flags |= IWL_POWER_PCI_PM_MSK;
+
+        IWL_DEBUG_POWER(priv, "Sleep command for CAM\n");
+}
+
+static int iwl_set_power(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd)
+{
+        IWL_DEBUG_POWER(priv, "Sending power/sleep command\n");
+        IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags);
+        IWL_DEBUG_POWER(priv, "Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
+        IWL_DEBUG_POWER(priv, "Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
+        IWL_DEBUG_POWER(priv, "Sleep interval vector = { %d , %d , %d , %d , %d }\n",
+                        le32_to_cpu(cmd->sleep_interval[0]),
+                        le32_to_cpu(cmd->sleep_interval[1]),
+                        le32_to_cpu(cmd->sleep_interval[2]),
+                        le32_to_cpu(cmd->sleep_interval[3]),
+                        le32_to_cpu(cmd->sleep_interval[4]));
+
+        return iwl_dvm_send_cmd_pdu(priv, POWER_TABLE_CMD, CMD_SYNC,
+                                sizeof(struct iwl_powertable_cmd), cmd);
+}
+
+static void iwl_power_build_cmd(struct iwl_priv *priv,
+                                struct iwl_powertable_cmd *cmd)
+{
+        bool enabled = priv->hw->conf.flags & IEEE80211_CONF_PS;
+        int dtimper;
+
+        dtimper = priv->hw->conf.ps_dtim_period ?: 1;
+
+        if (priv->wowlan)
+                iwl_static_sleep_cmd(priv, cmd, IWL_POWER_INDEX_5, dtimper);
+        else if (!priv->cfg->base_params->no_idle_support &&
+                 priv->hw->conf.flags & IEEE80211_CONF_IDLE)
+                iwl_static_sleep_cmd(priv, cmd, IWL_POWER_INDEX_5, 20);
+        else if (iwl_tt_is_low_power_state(priv)) {
+                /* in thermal throttling low power state */
+                iwl_static_sleep_cmd(priv, cmd,
+                    iwl_tt_current_power_mode(priv), dtimper);
+        } else if (!enabled)
+                iwl_power_sleep_cam_cmd(priv, cmd);
+        else if (priv->power_data.debug_sleep_level_override >= 0)
+                iwl_static_sleep_cmd(priv, cmd,
+                                     priv->power_data.debug_sleep_level_override,
+                                     dtimper);
+        else {
+                /* Note that the user parameter is 1-5 (according to spec),
+                but we pass 0-4 because it acts as an array index. */
+                if (iwlwifi_mod_params.power_level > IWL_POWER_INDEX_1 &&
+                    iwlwifi_mod_params.power_level <= IWL_POWER_NUM)
+                        iwl_static_sleep_cmd(priv, cmd,
+                                iwlwifi_mod_params.power_level - 1, dtimper);
+                else
+                        iwl_static_sleep_cmd(priv, cmd,
+                                IWL_POWER_INDEX_1, dtimper);
+        }
+}
+
+int iwl_power_set_mode(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd,
+                       bool force)
+{
+        int ret;
+        bool update_chains;
+
+        lockdep_assert_held(&priv->mutex);
+
+        /* Don't update the RX chain when chain noise calibration is running */
+        update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
+                        priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
+
+        if (!memcmp(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
+                return 0;
+
+        if (!iwl_is_ready_rf(priv))
+                return -EIO;
+
+        /* scan complete use sleep_power_next, need to be updated */
+        memcpy(&priv->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
+        if (test_bit(STATUS_SCANNING, &priv->status) && !force) {
+                IWL_DEBUG_INFO(priv, "Defer power set mode while scanning\n");
+                return 0;
+        }
+
+        if (cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK)
+                iwl_dvm_set_pmi(priv, true);
+
+        ret = iwl_set_power(priv, cmd);
+        if (!ret) {
+                if (!(cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK))
+                        iwl_dvm_set_pmi(priv, false);
+
+                if (update_chains)
+                        iwl_update_chain_flags(priv);
+                else
+                        IWL_DEBUG_POWER(priv,
+                                        "Cannot update the power, chain noise "
+                                        "calibration running: %d\n",
+                                        priv->chain_noise_data.state);
+
+                memcpy(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd));
+        } else
+                IWL_ERR(priv, "set power fail, ret = %d", ret);
+
+        return ret;
+}
+
+int iwl_power_update_mode(struct iwl_priv *priv, bool force)
+{
+        struct iwl_powertable_cmd cmd;
+
+        iwl_power_build_cmd(priv, &cmd);
+        return iwl_power_set_mode(priv, &cmd, force);
+}
+
+/* initialize to default */
+void iwl_power_initialize(struct iwl_priv *priv)
+{
+        priv->power_data.bus_pm = priv->trans->pm_support;
+
+        priv->power_data.debug_sleep_level_override = -1;
+
+        memset(&priv->power_data.sleep_cmd, 0,
+                sizeof(priv->power_data.sleep_cmd));
+}