/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
 * Copyright (C) 2015 Intel Deutschland GmbH
 *
 * 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 COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#include <net/mac80211.h>

#include "iwl-debug.h"
#include "iwl-io.h"
#include "iwl-prph.h"
#include "fw-dbg.h"
#include "mvm.h"
#include "fw-api-rs.h"

/*
 * Will return 0 even if the cmd failed when RFKILL is asserted unless
 * CMD_WANT_SKB is set in cmd->flags.
 */
int iwl_mvm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd)
{
        int ret;

#if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
        if (WARN_ON(mvm->d3_test_active))
                return -EIO;
#endif

        /*
         * Synchronous commands from this op-mode must hold
         * the mutex, this ensures we don't try to send two
         * (or more) synchronous commands at a time.
         */
        if (!(cmd->flags & CMD_ASYNC)) {
                lockdep_assert_held(&mvm->mutex);
                if (!(cmd->flags & CMD_SEND_IN_IDLE))
                        iwl_mvm_ref(mvm, IWL_MVM_REF_SENDING_CMD);
        }

        ret = iwl_trans_send_cmd(mvm->trans, cmd);

        if (!(cmd->flags & (CMD_ASYNC | CMD_SEND_IN_IDLE)))
                iwl_mvm_unref(mvm, IWL_MVM_REF_SENDING_CMD);

        /*
         * If the caller wants the SKB, then don't hide any problems, the
         * caller might access the response buffer which will be NULL if
         * the command failed.
         */
        if (cmd->flags & CMD_WANT_SKB)
                return ret;

        /* Silently ignore failures if RFKILL is asserted */
        if (!ret || ret == -ERFKILL)
                return 0;
        return ret;
}

int iwl_mvm_send_cmd_pdu(struct iwl_mvm *mvm, u32 id,
                         u32 flags, u16 len, const void *data)
{
        struct iwl_host_cmd cmd = {
                .id = id,
                .len = { len, },
                .data = { data, },
                .flags = flags,
        };

        return iwl_mvm_send_cmd(mvm, &cmd);
}

/*
 * We assume that the caller set the status to the success value
 */
int iwl_mvm_send_cmd_status(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd,
                            u32 *status)
{
        struct iwl_rx_packet *pkt;
        struct iwl_cmd_response *resp;
        int ret, resp_len;

        lockdep_assert_held(&mvm->mutex);

#if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
        if (WARN_ON(mvm->d3_test_active))
                return -EIO;
#endif

        /*
         * Only synchronous commands can wait for status,
         * we use WANT_SKB so the caller can't.
         */
        if (WARN_ONCE(cmd->flags & (CMD_ASYNC | CMD_WANT_SKB),
                      "cmd flags %x", cmd->flags))
                return -EINVAL;

        cmd->flags |= CMD_WANT_SKB;

        ret = iwl_trans_send_cmd(mvm->trans, cmd);
        if (ret == -ERFKILL) {
                /*
                 * The command failed because of RFKILL, don't update
                 * the status, leave it as success and return 0.
                 */
                return 0;
        } else if (ret) {
                return ret;
        }

        pkt = cmd->resp_pkt;
        /* Can happen if RFKILL is asserted */
        if (!pkt) {
                ret = 0;
                goto out_free_resp;
        }

        resp_len = iwl_rx_packet_payload_len(pkt);
        if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
                ret = -EIO;
                goto out_free_resp;
        }

        resp = (void *)pkt->data;
        *status = le32_to_cpu(resp->status);
 out_free_resp:
        iwl_free_resp(cmd);
        return ret;
}

/*
 * We assume that the caller set the status to the sucess value
 */
int iwl_mvm_send_cmd_pdu_status(struct iwl_mvm *mvm, u32 id, u16 len,
                                const void *data, u32 *status)
{
        struct iwl_host_cmd cmd = {
                .id = id,
                .len = { len, },
                .data = { data, },
        };

        return iwl_mvm_send_cmd_status(mvm, &cmd, status);
}

#define IWL_DECLARE_RATE_INFO(r) \
        [IWL_RATE_##r##M_INDEX] = IWL_RATE_##r##M_PLCP

/*
 * Translate from fw_rate_index (IWL_RATE_XXM_INDEX) to PLCP
 */
static const u8 fw_rate_idx_to_plcp[IWL_RATE_COUNT] = {
        IWL_DECLARE_RATE_INFO(1),
        IWL_DECLARE_RATE_INFO(2),
        IWL_DECLARE_RATE_INFO(5),
        IWL_DECLARE_RATE_INFO(11),
        IWL_DECLARE_RATE_INFO(6),
        IWL_DECLARE_RATE_INFO(9),
        IWL_DECLARE_RATE_INFO(12),
        IWL_DECLARE_RATE_INFO(18),
        IWL_DECLARE_RATE_INFO(24),
        IWL_DECLARE_RATE_INFO(36),
        IWL_DECLARE_RATE_INFO(48),
        IWL_DECLARE_RATE_INFO(54),
};

int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
                                        enum nl80211_band band)
{
        int rate = rate_n_flags & RATE_LEGACY_RATE_MSK;
        int idx;
        int band_offset = 0;

        /* Legacy rate format, search for match in table */
        if (band == NL80211_BAND_5GHZ)
                band_offset = IWL_FIRST_OFDM_RATE;
        for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
                if (fw_rate_idx_to_plcp[idx] == rate)
                        return idx - band_offset;

        return -1;
}

u8 iwl_mvm_mac80211_idx_to_hwrate(int rate_idx)
{
        /* Get PLCP rate for tx_cmd->rate_n_flags */
        return fw_rate_idx_to_plcp[rate_idx];
}

void iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
{
        struct iwl_rx_packet *pkt = rxb_addr(rxb);
        struct iwl_error_resp *err_resp = (void *)pkt->data;

        IWL_ERR(mvm, "FW Error notification: type 0x%08X cmd_id 0x%02X\n",
                le32_to_cpu(err_resp->error_type), err_resp->cmd_id);
        IWL_ERR(mvm, "FW Error notification: seq 0x%04X service 0x%08X\n",
                le16_to_cpu(err_resp->bad_cmd_seq_num),
                le32_to_cpu(err_resp->error_service));
        IWL_ERR(mvm, "FW Error notification: timestamp 0x%16llX\n",
                le64_to_cpu(err_resp->timestamp));
}

/*
 * Returns the first antenna as ANT_[ABC], as defined in iwl-config.h.
 * The parameter should also be a combination of ANT_[ABC].
 */
u8 first_antenna(u8 mask)
{
        BUILD_BUG_ON(ANT_A != BIT(0)); /* using ffs is wrong if not */
        if (WARN_ON_ONCE(!mask)) /* ffs will return 0 if mask is zeroed */
                return BIT(0);
        return BIT(ffs(mask) - 1);
}

/*
 * Toggles between TX antennas to send the probe request on.
 * Receives the bitmask of valid TX antennas and the *index* used
 * for the last TX, and returns the next valid *index* to use.
 * In order to set it in the tx_cmd, must do BIT(idx).
 */
u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx)
{
        u8 ind = last_idx;
        int i;

        for (i = 0; i < RATE_MCS_ANT_NUM; i++) {
                ind = (ind + 1) % RATE_MCS_ANT_NUM;
                if (valid & BIT(ind))
                        return ind;
        }

        WARN_ONCE(1, "Failed to toggle between antennas 0x%x", valid);
        return last_idx;
}

static const struct {
        const char *name;
        u8 num;
} advanced_lookup[] = {
        { "NMI_INTERRUPT_WDG", 0x34 },
        { "SYSASSERT", 0x35 },
        { "UCODE_VERSION_MISMATCH", 0x37 },
        { "BAD_COMMAND", 0x38 },
        { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
        { "FATAL_ERROR", 0x3D },
        { "NMI_TRM_HW_ERR", 0x46 },
        { "NMI_INTERRUPT_TRM", 0x4C },
        { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
        { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
        { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
        { "NMI_INTERRUPT_HOST", 0x66 },
        { "NMI_INTERRUPT_ACTION_PT", 0x7C },
        { "NMI_INTERRUPT_UNKNOWN", 0x84 },
        { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
        { "ADVANCED_SYSASSERT", 0 },
};

static const char *desc_lookup(u32 num)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(advanced_lookup) - 1; i++)
                if (advanced_lookup[i].num == num)
                        return advanced_lookup[i].name;

        /* No entry matches 'num', so it is the last: ADVANCED_SYSASSERT */
        return advanced_lookup[i].name;
}

/*
 * Note: This structure is read from the device with IO accesses,
 * and the reading already does the endian conversion. As it is
 * read with u32-sized accesses, any members with a different size
 * need to be ordered correctly though!
 */
struct iwl_error_event_table_v1 {
        u32 valid;              /* (nonzero) valid, (0) log is empty */
        u32 error_id;           /* type of error */
        u32 pc;                 /* program counter */
        u32 blink1;             /* branch link */
        u32 blink2;             /* branch link */
        u32 ilink1;             /* interrupt link */
        u32 ilink2;             /* interrupt link */
        u32 data1;              /* error-specific data */
        u32 data2;              /* error-specific data */
        u32 data3;              /* error-specific data */
        u32 bcon_time;          /* beacon timer */
        u32 tsf_low;            /* network timestamp function timer */
        u32 tsf_hi;             /* network timestamp function timer */
        u32 gp1;                /* GP1 timer register */
        u32 gp2;                /* GP2 timer register */
        u32 gp3;                /* GP3 timer register */
        u32 ucode_ver;          /* uCode version */
        u32 hw_ver;             /* HW Silicon version */
        u32 brd_ver;            /* HW board version */
        u32 log_pc;             /* log program counter */
        u32 frame_ptr;          /* frame pointer */
        u32 stack_ptr;          /* stack pointer */
        u32 hcmd;               /* last host command header */
        u32 isr0;               /* isr status register LMPM_NIC_ISR0:
                                 * rxtx_flag */
        u32 isr1;               /* isr status register LMPM_NIC_ISR1:
                                 * host_flag */
        u32 isr2;               /* isr status register LMPM_NIC_ISR2:
                                 * enc_flag */
        u32 isr3;               /* isr status register LMPM_NIC_ISR3:
                                 * time_flag */
        u32 isr4;               /* isr status register LMPM_NIC_ISR4:
                                 * wico interrupt */
        u32 isr_pref;           /* isr status register LMPM_NIC_PREF_STAT */
        u32 wait_event;         /* wait event() caller address */
        u32 l2p_control;        /* L2pControlField */
        u32 l2p_duration;       /* L2pDurationField */
        u32 l2p_mhvalid;        /* L2pMhValidBits */
        u32 l2p_addr_match;     /* L2pAddrMatchStat */
        u32 lmpm_pmg_sel;       /* indicate which clocks are turned on
                                 * (LMPM_PMG_SEL) */
        u32 u_timestamp;        /* indicate when the date and time of the
                                 * compilation */
        u32 flow_handler;       /* FH read/write pointers, RX credit */
} __packed /* LOG_ERROR_TABLE_API_S_VER_1 */;

struct iwl_error_event_table {
        u32 valid;              /* (nonzero) valid, (0) log is empty */
        u32 error_id;           /* type of error */
        u32 trm_hw_status0;     /* TRM HW status */
        u32 trm_hw_status1;     /* TRM HW status */
        u32 blink2;             /* branch link */
        u32 ilink1;             /* interrupt link */
        u32 ilink2;             /* interrupt link */
        u32 data1;              /* error-specific data */
        u32 data2;              /* error-specific data */
        u32 data3;              /* error-specific data */
        u32 bcon_time;          /* beacon timer */
        u32 tsf_low;            /* network timestamp function timer */
        u32 tsf_hi;             /* network timestamp function timer */
        u32 gp1;                /* GP1 timer register */
        u32 gp2;                /* GP2 timer register */
        u32 fw_rev_type;        /* firmware revision type */
        u32 major;              /* uCode version major */
        u32 minor;              /* uCode version minor */
        u32 hw_ver;             /* HW Silicon version */
        u32 brd_ver;            /* HW board version */
        u32 log_pc;             /* log program counter */
        u32 frame_ptr;          /* frame pointer */
        u32 stack_ptr;          /* stack pointer */
        u32 hcmd;               /* last host command header */
        u32 isr0;               /* isr status register LMPM_NIC_ISR0:
                                 * rxtx_flag */
        u32 isr1;               /* isr status register LMPM_NIC_ISR1:
                                 * host_flag */
        u32 isr2;               /* isr status register LMPM_NIC_ISR2:
                                 * enc_flag */
        u32 isr3;               /* isr status register LMPM_NIC_ISR3:
                                 * time_flag */
        u32 isr4;               /* isr status register LMPM_NIC_ISR4:
                                 * wico interrupt */
        u32 last_cmd_id;        /* last HCMD id handled by the firmware */
        u32 wait_event;         /* wait event() caller address */
        u32 l2p_control;        /* L2pControlField */
        u32 l2p_duration;       /* L2pDurationField */
        u32 l2p_mhvalid;        /* L2pMhValidBits */
        u32 l2p_addr_match;     /* L2pAddrMatchStat */
        u32 lmpm_pmg_sel;       /* indicate which clocks are turned on
                                 * (LMPM_PMG_SEL) */
        u32 u_timestamp;        /* indicate when the date and time of the
                                 * compilation */
        u32 flow_handler;       /* FH read/write pointers, RX credit */
} __packed /* LOG_ERROR_TABLE_API_S_VER_3 */;

/*
 * UMAC error struct - relevant starting from family 8000 chip.
 * Note: This structure is read from the device with IO accesses,
 * and the reading already does the endian conversion. As it is
 * read with u32-sized accesses, any members with a different size
 * need to be ordered correctly though!
 */
struct iwl_umac_error_event_table {
        u32 valid;              /* (nonzero) valid, (0) log is empty */
        u32 error_id;           /* type of error */
        u32 blink1;             /* branch link */
        u32 blink2;             /* branch link */
        u32 ilink1;             /* interrupt link */
        u32 ilink2;             /* interrupt link */
        u32 data1;              /* error-specific data */
        u32 data2;              /* error-specific data */
        u32 data3;              /* error-specific data */
        u32 umac_major;
        u32 umac_minor;
        u32 frame_pointer;      /* core register 27*/
        u32 stack_pointer;      /* core register 28 */
        u32 cmd_header;         /* latest host cmd sent to UMAC */
        u32 nic_isr_pref;       /* ISR status register */
} __packed;

#define ERROR_START_OFFSET  (1 * sizeof(u32))
#define ERROR_ELEM_SIZE     (7 * sizeof(u32))

static void iwl_mvm_dump_umac_error_log(struct iwl_mvm *mvm)
{
        struct iwl_trans *trans = mvm->trans;
        struct iwl_umac_error_event_table table;
        u32 base;

        base = mvm->umac_error_event_table;

        if (base < 0x800000) {
                IWL_ERR(mvm,
                        "Not valid error log pointer 0x%08X for %s uCode\n",
                        base,
                        (mvm->cur_ucode == IWL_UCODE_INIT)
                                        ? "Init" : "RT");
                return;
        }

        iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));

        if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
                IWL_ERR(trans, "Start IWL Error Log Dump:\n");
                IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
                        mvm->status, table.valid);
        }

        IWL_ERR(mvm, "0x%08X | %s\n", table.error_id,
                desc_lookup(table.error_id));
        IWL_ERR(mvm, "0x%08X | umac branchlink1\n", table.blink1);
        IWL_ERR(mvm, "0x%08X | umac branchlink2\n", table.blink2);
        IWL_ERR(mvm, "0x%08X | umac interruptlink1\n", table.ilink1);
        IWL_ERR(mvm, "0x%08X | umac interruptlink2\n", table.ilink2);
        IWL_ERR(mvm, "0x%08X | umac data1\n", table.data1);
        IWL_ERR(mvm, "0x%08X | umac data2\n", table.data2);
        IWL_ERR(mvm, "0x%08X | umac data3\n", table.data3);
        IWL_ERR(mvm, "0x%08X | umac major\n", table.umac_major);
        IWL_ERR(mvm, "0x%08X | umac minor\n", table.umac_minor);
        IWL_ERR(mvm, "0x%08X | frame pointer\n", table.frame_pointer);
        IWL_ERR(mvm, "0x%08X | stack pointer\n", table.stack_pointer);
        IWL_ERR(mvm, "0x%08X | last host cmd\n", table.cmd_header);
        IWL_ERR(mvm, "0x%08X | isr status reg\n", table.nic_isr_pref);
}

static void iwl_mvm_dump_lmac_error_log(struct iwl_mvm *mvm, u32 base)
{
        struct iwl_trans *trans = mvm->trans;
        struct iwl_error_event_table table;

        if (mvm->cur_ucode == IWL_UCODE_INIT) {
                if (!base)
                        base = mvm->fw->init_errlog_ptr;
        } else {
                if (!base)
                        base = mvm->fw->inst_errlog_ptr;
        }

        if (base < 0x400000) {
                IWL_ERR(mvm,
                        "Not valid error log pointer 0x%08X for %s uCode\n",
                        base,
                        (mvm->cur_ucode == IWL_UCODE_INIT)
                                        ? "Init" : "RT");
                return;
        }

        iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));

        if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
                IWL_ERR(trans, "Start IWL Error Log Dump:\n");
                IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
                        mvm->status, table.valid);
        }

        /* Do not change this output - scripts rely on it */

        IWL_ERR(mvm, "Loaded firmware version: %s\n", mvm->fw->fw_version);

        trace_iwlwifi_dev_ucode_error(trans->dev, table.error_id, table.tsf_low,
                                      table.data1, table.data2, table.data3,
                                      table.blink2, table.ilink1,
                                      table.ilink2, table.bcon_time, table.gp1,
                                      table.gp2, table.fw_rev_type, table.major,
                                      table.minor, table.hw_ver, table.brd_ver);
        IWL_ERR(mvm, "0x%08X | %-28s\n", table.error_id,
                desc_lookup(table.error_id));
        IWL_ERR(mvm, "0x%08X | trm_hw_status0\n", table.trm_hw_status0);
        IWL_ERR(mvm, "0x%08X | trm_hw_status1\n", table.trm_hw_status1);
        IWL_ERR(mvm, "0x%08X | branchlink2\n", table.blink2);
        IWL_ERR(mvm, "0x%08X | interruptlink1\n", table.ilink1);
        IWL_ERR(mvm, "0x%08X | interruptlink2\n", table.ilink2);
        IWL_ERR(mvm, "0x%08X | data1\n", table.data1);
        IWL_ERR(mvm, "0x%08X | data2\n", table.data2);
        IWL_ERR(mvm, "0x%08X | data3\n", table.data3);
        IWL_ERR(mvm, "0x%08X | beacon time\n", table.bcon_time);
        IWL_ERR(mvm, "0x%08X | tsf low\n", table.tsf_low);
        IWL_ERR(mvm, "0x%08X | tsf hi\n", table.tsf_hi);
        IWL_ERR(mvm, "0x%08X | time gp1\n", table.gp1);
        IWL_ERR(mvm, "0x%08X | time gp2\n", table.gp2);
        IWL_ERR(mvm, "0x%08X | uCode revision type\n", table.fw_rev_type);
        IWL_ERR(mvm, "0x%08X | uCode version major\n", table.major);
        IWL_ERR(mvm, "0x%08X | uCode version minor\n", table.minor);
        IWL_ERR(mvm, "0x%08X | hw version\n", table.hw_ver);
        IWL_ERR(mvm, "0x%08X | board version\n", table.brd_ver);
        IWL_ERR(mvm, "0x%08X | hcmd\n", table.hcmd);
        IWL_ERR(mvm, "0x%08X | isr0\n", table.isr0);
        IWL_ERR(mvm, "0x%08X | isr1\n", table.isr1);
        IWL_ERR(mvm, "0x%08X | isr2\n", table.isr2);
        IWL_ERR(mvm, "0x%08X | isr3\n", table.isr3);
        IWL_ERR(mvm, "0x%08X | isr4\n", table.isr4);
        IWL_ERR(mvm, "0x%08X | last cmd Id\n", table.last_cmd_id);
        IWL_ERR(mvm, "0x%08X | wait_event\n", table.wait_event);
        IWL_ERR(mvm, "0x%08X | l2p_control\n", table.l2p_control);
        IWL_ERR(mvm, "0x%08X | l2p_duration\n", table.l2p_duration);
        IWL_ERR(mvm, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
        IWL_ERR(mvm, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
        IWL_ERR(mvm, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
        IWL_ERR(mvm, "0x%08X | timestamp\n", table.u_timestamp);
        IWL_ERR(mvm, "0x%08X | flow_handler\n", table.flow_handler);
}

void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm)
{
        iwl_mvm_dump_lmac_error_log(mvm, mvm->error_event_table[0]);

        if (mvm->error_event_table[1])
                iwl_mvm_dump_lmac_error_log(mvm, mvm->error_event_table[1]);

        if (mvm->support_umac_log)
                iwl_mvm_dump_umac_error_log(mvm);
}

int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id, u8 minq, u8 maxq)
{
        int i;

        lockdep_assert_held(&mvm->queue_info_lock);

        /* Start by looking for a free queue */
        for (i = minq; i <= maxq; i++)
                if (mvm->queue_info[i].hw_queue_refcount == 0 &&
                    mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
                        return i;

        /*
         * If no free queue found - settle for an inactive one to reconfigure
         * Make sure that the inactive queue either already belongs to this STA,
         * or that if it belongs to another one - it isn't the reserved queue
         */
        for (i = minq; i <= maxq; i++)
                if (mvm->queue_info[i].status == IWL_MVM_QUEUE_INACTIVE &&
                    (sta_id == mvm->queue_info[i].ra_sta_id ||
                     !mvm->queue_info[i].reserved))
                        return i;

        return -ENOSPC;
}

int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo, int sta_id,
                         int tid, int frame_limit, u16 ssn)
{
        struct iwl_scd_txq_cfg_cmd cmd = {
                .scd_queue = queue,
                .action = SCD_CFG_ENABLE_QUEUE,
                .window = frame_limit,
                .sta_id = sta_id,
                .ssn = cpu_to_le16(ssn),
                .tx_fifo = fifo,
                .aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
                              queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE),
                .tid = tid,
        };
        int ret;

        spin_lock_bh(&mvm->queue_info_lock);
        if (WARN(mvm->queue_info[queue].hw_queue_refcount == 0,
                 "Trying to reconfig unallocated queue %d\n", queue)) {
                spin_unlock_bh(&mvm->queue_info_lock);
                return -ENXIO;
        }
        spin_unlock_bh(&mvm->queue_info_lock);

        IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue);

        ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
        WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n",
                  queue, fifo, ret);

        return ret;
}

void iwl_mvm_enable_txq(struct iwl_mvm *mvm, int queue, int mac80211_queue,
                        u16 ssn, const struct iwl_trans_txq_scd_cfg *cfg,
                        unsigned int wdg_timeout)
{
        bool enable_queue = true;

        spin_lock_bh(&mvm->queue_info_lock);

        /* Make sure this TID isn't already enabled */
        if (mvm->queue_info[queue].tid_bitmap & BIT(cfg->tid)) {
                spin_unlock_bh(&mvm->queue_info_lock);
                IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
                        queue, cfg->tid);
                return;
        }

        /* Update mappings and refcounts */
        if (mvm->queue_info[queue].hw_queue_refcount > 0)
                enable_queue = false;

        mvm->queue_info[queue].hw_queue_to_mac80211 |= BIT(mac80211_queue);
        mvm->queue_info[queue].hw_queue_refcount++;
        mvm->queue_info[queue].tid_bitmap |= BIT(cfg->tid);
        mvm->queue_info[queue].ra_sta_id = cfg->sta_id;

        if (enable_queue) {
                if (cfg->tid != IWL_MAX_TID_COUNT)
                        mvm->queue_info[queue].mac80211_ac =
                                tid_to_mac80211_ac[cfg->tid];
                else
                        mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;

                mvm->queue_info[queue].txq_tid = cfg->tid;
        }

        IWL_DEBUG_TX_QUEUES(mvm,
                            "Enabling TXQ #%d refcount=%d (mac80211 map:0x%x)\n",
                            queue, mvm->queue_info[queue].hw_queue_refcount,
                            mvm->queue_info[queue].hw_queue_to_mac80211);

        spin_unlock_bh(&mvm->queue_info_lock);

        /* Send the enabling command if we need to */
        if (enable_queue) {
                struct iwl_scd_txq_cfg_cmd cmd = {
                        .scd_queue = queue,
                        .action = SCD_CFG_ENABLE_QUEUE,
                        .window = cfg->frame_limit,
                        .sta_id = cfg->sta_id,
                        .ssn = cpu_to_le16(ssn),
                        .tx_fifo = cfg->fifo,
                        .aggregate = cfg->aggregate,
                        .tid = cfg->tid,
                };

                iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL,
                                         wdg_timeout);
                WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd),
                                          &cmd),
                     "Failed to configure queue %d on FIFO %d\n", queue,
                     cfg->fifo);
        }
}

int iwl_mvm_disable_txq(struct iwl_mvm *mvm, int queue, int mac80211_queue,
                        u8 tid, u8 flags)
{
        struct iwl_scd_txq_cfg_cmd cmd = {
                .scd_queue = queue,
                .action = SCD_CFG_DISABLE_QUEUE,
        };
        bool remove_mac_queue = true;
        int ret;

        spin_lock_bh(&mvm->queue_info_lock);

        if (WARN_ON(mvm->queue_info[queue].hw_queue_refcount == 0)) {
                spin_unlock_bh(&mvm->queue_info_lock);
                return 0;
        }

        mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);

        /*
         * If there is another TID with the same AC - don't remove the MAC queue
         * from the mapping
         */
        if (tid < IWL_MAX_TID_COUNT) {
                unsigned long tid_bitmap =
                        mvm->queue_info[queue].tid_bitmap;
                int ac = tid_to_mac80211_ac[tid];
                int i;

                for_each_set_bit(i, &tid_bitmap, IWL_MAX_TID_COUNT) {
                        if (tid_to_mac80211_ac[i] == ac)
                                remove_mac_queue = false;
                }
        }

        if (remove_mac_queue)
                mvm->queue_info[queue].hw_queue_to_mac80211 &=
                        ~BIT(mac80211_queue);
        mvm->queue_info[queue].hw_queue_refcount--;

        cmd.action = mvm->queue_info[queue].hw_queue_refcount ?
                SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
        if (cmd.action == SCD_CFG_DISABLE_QUEUE)
                mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;

        IWL_DEBUG_TX_QUEUES(mvm,
                            "Disabling TXQ #%d refcount=%d (mac80211 map:0x%x)\n",
                            queue,
                            mvm->queue_info[queue].hw_queue_refcount,
                            mvm->queue_info[queue].hw_queue_to_mac80211);

        /* If the queue is still enabled - nothing left to do in this func */
        if (cmd.action == SCD_CFG_ENABLE_QUEUE) {
                spin_unlock_bh(&mvm->queue_info_lock);
                return 0;
        }

        cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
        cmd.tid = mvm->queue_info[queue].txq_tid;

        /* Make sure queue info is correct even though we overwrite it */
        WARN(mvm->queue_info[queue].hw_queue_refcount ||
             mvm->queue_info[queue].tid_bitmap ||
             mvm->queue_info[queue].hw_queue_to_mac80211,
             "TXQ #%d info out-of-sync - refcount=%d, mac map=0x%x, tid=0x%x\n",
             queue, mvm->queue_info[queue].hw_queue_refcount,
             mvm->queue_info[queue].hw_queue_to_mac80211,
             mvm->queue_info[queue].tid_bitmap);

        /* If we are here - the queue is freed and we can zero out these vals */
        mvm->queue_info[queue].hw_queue_refcount = 0;
        mvm->queue_info[queue].tid_bitmap = 0;
        mvm->queue_info[queue].hw_queue_to_mac80211 = 0;

        /* Regardless if this is a reserved TXQ for a STA - mark it as false */
        mvm->queue_info[queue].reserved = false;

        spin_unlock_bh(&mvm->queue_info_lock);

        iwl_trans_txq_disable(mvm->trans, queue, false);
        ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags,
                                   sizeof(cmd), &cmd);
        if (ret)
                IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n",
                        queue, ret);

        return ret;
}

/**
 * iwl_mvm_send_lq_cmd() - Send link quality command
 * @init: This command is sent as part of station initialization right
 *        after station has been added.
 *
 * The link quality command is sent as the last step of station creation.
 * This is the special case in which init is set and we call a callback in
 * this case to clear the state indicating that station creation is in
 * progress.
 */
int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq, bool init)
{
        struct iwl_host_cmd cmd = {
                .id = LQ_CMD,
                .len = { sizeof(struct iwl_lq_cmd), },
                .flags = init ? 0 : CMD_ASYNC,
                .data = { lq, },
        };

        if (WARN_ON(lq->sta_id == IWL_MVM_STATION_COUNT))
                return -EINVAL;

        return iwl_mvm_send_cmd(mvm, &cmd);
}

/**
 * iwl_mvm_update_smps - Get a request to change the SMPS mode
 * @req_type: The part of the driver who call for a change.
 * @smps_requests: The request to change the SMPS mode.
 *
 * Get a requst to change the SMPS mode,
 * and change it according to all other requests in the driver.
 */
void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
                         enum iwl_mvm_smps_type_request req_type,
                         enum ieee80211_smps_mode smps_request)
{
        struct iwl_mvm_vif *mvmvif;
        enum ieee80211_smps_mode smps_mode;
        int i;

        lockdep_assert_held(&mvm->mutex);

        /* SMPS is irrelevant for NICs that don't have at least 2 RX antenna */
        if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
                return;

        if (vif->type == NL80211_IFTYPE_AP)
                smps_mode = IEEE80211_SMPS_OFF;
        else
                smps_mode = IEEE80211_SMPS_AUTOMATIC;

        mvmvif = iwl_mvm_vif_from_mac80211(vif);
        mvmvif->smps_requests[req_type] = smps_request;
        for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
                if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC) {
                        smps_mode = IEEE80211_SMPS_STATIC;
                        break;
                }
                if (mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
                        smps_mode = IEEE80211_SMPS_DYNAMIC;
        }

        ieee80211_request_smps(vif, smps_mode);
}

int iwl_mvm_request_statistics(struct iwl_mvm *mvm, bool clear)
{
        struct iwl_statistics_cmd scmd = {
                .flags = clear ? cpu_to_le32(IWL_STATISTICS_FLG_CLEAR) : 0,
        };
        struct iwl_host_cmd cmd = {
                .id = STATISTICS_CMD,
                .len[0] = sizeof(scmd),
                .data[0] = &scmd,
                .flags = CMD_WANT_SKB,
        };
        int ret;

        ret = iwl_mvm_send_cmd(mvm, &cmd);
        if (ret)
                return ret;

        iwl_mvm_handle_rx_statistics(mvm, cmd.resp_pkt);
        iwl_free_resp(&cmd);

        if (clear)
                iwl_mvm_accu_radio_stats(mvm);

        return 0;
}

void iwl_mvm_accu_radio_stats(struct iwl_mvm *mvm)
{
        mvm->accu_radio_stats.rx_time += mvm->radio_stats.rx_time;
        mvm->accu_radio_stats.tx_time += mvm->radio_stats.tx_time;
        mvm->accu_radio_stats.on_time_rf += mvm->radio_stats.on_time_rf;
        mvm->accu_radio_stats.on_time_scan += mvm->radio_stats.on_time_scan;
}

static void iwl_mvm_diversity_iter(void *_data, u8 *mac,
                                   struct ieee80211_vif *vif)
{
        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
        bool *result = _data;
        int i;

        for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
                if (mvmvif->smps_requests[i] == IEEE80211_SMPS_STATIC ||
                    mvmvif->smps_requests[i] == IEEE80211_SMPS_DYNAMIC)
                        *result = false;
        }
}

bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm)
{
        bool result = true;

        lockdep_assert_held(&mvm->mutex);

        if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
                return false;

        if (mvm->cfg->rx_with_siso_diversity)
                return false;

        ieee80211_iterate_active_interfaces_atomic(
                        mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
                        iwl_mvm_diversity_iter, &result);

        return result;
}

int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
                               bool prev)
{
        struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
        int res;

        lockdep_assert_held(&mvm->mutex);

        if (iwl_mvm_vif_low_latency(mvmvif) == prev)
                return 0;

        res = iwl_mvm_update_quotas(mvm, false, NULL);
        if (res)
                return res;

        iwl_mvm_bt_coex_vif_change(mvm);

        return iwl_mvm_power_update_mac(mvm);
}

static void iwl_mvm_ll_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
{
        bool *result = _data;

        if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(vif)))
                *result = true;
}

bool iwl_mvm_low_latency(struct iwl_mvm *mvm)
{
        bool result = false;

        ieee80211_iterate_active_interfaces_atomic(
                        mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
                        iwl_mvm_ll_iter, &result);

        return result;
}

struct iwl_bss_iter_data {
        struct ieee80211_vif *vif;
        bool error;
};

static void iwl_mvm_bss_iface_iterator(void *_data, u8 *mac,
                                       struct ieee80211_vif *vif)
{
        struct iwl_bss_iter_data *data = _data;

        if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
                return;

        if (data->vif) {
                data->error = true;
                return;
        }

        data->vif = vif;
}

struct ieee80211_vif *iwl_mvm_get_bss_vif(struct iwl_mvm *mvm)
{
        struct iwl_bss_iter_data bss_iter_data = {};

        ieee80211_iterate_active_interfaces_atomic(
                mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
                iwl_mvm_bss_iface_iterator, &bss_iter_data);

        if (bss_iter_data.error) {
                IWL_ERR(mvm, "More than one managed interface active!\n");
                return ERR_PTR(-EINVAL);
        }

        return bss_iter_data.vif;
}

unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
                                    struct ieee80211_vif *vif,
                                    bool tdls, bool cmd_q)
{
        struct iwl_fw_dbg_trigger_tlv *trigger;
        struct iwl_fw_dbg_trigger_txq_timer *txq_timer;
        unsigned int default_timeout =
                cmd_q ? IWL_DEF_WD_TIMEOUT : mvm->cfg->base_params->wd_timeout;

        if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS))
                return iwlmvm_mod_params.tfd_q_hang_detect ?
                        default_timeout : IWL_WATCHDOG_DISABLED;

        trigger = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS);
        txq_timer = (void *)trigger->data;

        if (tdls)
                return le32_to_cpu(txq_timer->tdls);

        if (cmd_q)
                return le32_to_cpu(txq_timer->command_queue);

        if (WARN_ON(!vif))
                return default_timeout;

        switch (ieee80211_vif_type_p2p(vif)) {
        case NL80211_IFTYPE_ADHOC:
                return le32_to_cpu(txq_timer->ibss);
        case NL80211_IFTYPE_STATION:
                return le32_to_cpu(txq_timer->bss);
        case NL80211_IFTYPE_AP:
                return le32_to_cpu(txq_timer->softap);
        case NL80211_IFTYPE_P2P_CLIENT:
                return le32_to_cpu(txq_timer->p2p_client);
        case NL80211_IFTYPE_P2P_GO:
                return le32_to_cpu(txq_timer->p2p_go);
        case NL80211_IFTYPE_P2P_DEVICE:
                return le32_to_cpu(txq_timer->p2p_device);
        default:
                WARN_ON(1);
                return mvm->cfg->base_params->wd_timeout;
        }
}

void iwl_mvm_connection_loss(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
                             const char *errmsg)
{
        struct iwl_fw_dbg_trigger_tlv *trig;
        struct iwl_fw_dbg_trigger_mlme *trig_mlme;

        if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
                goto out;

        trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
        trig_mlme = (void *)trig->data;
        if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
                goto out;

        if (trig_mlme->stop_connection_loss &&
            --trig_mlme->stop_connection_loss)
                goto out;

        iwl_mvm_fw_dbg_collect_trig(mvm, trig, "%s", errmsg);

out:
        ieee80211_connection_loss(vif);
}

/*
 * Remove inactive TIDs of a given queue.
 * If all queue TIDs are inactive - mark the queue as inactive
 * If only some the queue TIDs are inactive - unmap them from the queue
 */
static void iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
                                         struct iwl_mvm_sta *mvmsta, int queue,
                                         unsigned long tid_bitmap)
{
        int tid;

        lockdep_assert_held(&mvmsta->lock);
        lockdep_assert_held(&mvm->queue_info_lock);

        /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
        for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
                /* If some TFDs are still queued - don't mark TID as inactive */
                if (iwl_mvm_tid_queued(&mvmsta->tid_data[tid]))
                        tid_bitmap &= ~BIT(tid);
        }

        /* If all TIDs in the queue are inactive - mark queue as inactive. */
        if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
                mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;

                for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1)
                        mvmsta->tid_data[tid].is_tid_active = false;

                IWL_DEBUG_TX_QUEUES(mvm, "Queue %d marked as inactive\n",
                                    queue);
                return;
        }

        /*
         * If we are here, this is a shared queue and not all TIDs timed-out.
         * Remove the ones that did.
         */
        for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
                int mac_queue = mvmsta->vif->hw_queue[tid_to_mac80211_ac[tid]];

                mvmsta->tid_data[tid].txq_id = IEEE80211_INVAL_HW_QUEUE;
                mvm->queue_info[queue].hw_queue_to_mac80211 &= ~BIT(mac_queue);
                mvm->queue_info[queue].hw_queue_refcount--;
                mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
                mvmsta->tid_data[tid].is_tid_active = false;

                IWL_DEBUG_TX_QUEUES(mvm,
                                    "Removing inactive TID %d from shared Q:%d\n",
                                    tid, queue);
        }

        IWL_DEBUG_TX_QUEUES(mvm,
                            "TXQ #%d left with tid bitmap 0x%x\n", queue,
                            mvm->queue_info[queue].tid_bitmap);

        /*
         * There may be different TIDs with the same mac queues, so make
         * sure all TIDs have existing corresponding mac queues enabled
         */
        tid_bitmap = mvm->queue_info[queue].tid_bitmap;
        for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
                mvm->queue_info[queue].hw_queue_to_mac80211 |=
                        BIT(mvmsta->vif->hw_queue[tid_to_mac80211_ac[tid]]);
        }

        /* If the queue is marked as shared - "unshare" it */
        if (mvm->queue_info[queue].hw_queue_refcount == 1 &&
            mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
                mvm->queue_info[queue].status = IWL_MVM_QUEUE_RECONFIGURING;
                IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
                                    queue);
        }
}

void iwl_mvm_inactivity_check(struct iwl_mvm *mvm)
{
        unsigned long timeout_queues_map = 0;
        unsigned long now = jiffies;
        int i;

        spin_lock_bh(&mvm->queue_info_lock);
        for (i = 0; i < IWL_MAX_HW_QUEUES; i++)
                if (mvm->queue_info[i].hw_queue_refcount > 0)
                        timeout_queues_map |= BIT(i);
        spin_unlock_bh(&mvm->queue_info_lock);

        rcu_read_lock();

        /*
         * If a queue time outs - mark it as INACTIVE (don't remove right away
         * if we don't have to.) This is an optimization in case traffic comes
         * later, and we don't HAVE to use a currently-inactive queue
         */
        for_each_set_bit(i, &timeout_queues_map, IWL_MAX_HW_QUEUES) {
                struct ieee80211_sta *sta;
                struct iwl_mvm_sta *mvmsta;
                u8 sta_id;
                int tid;
                unsigned long inactive_tid_bitmap = 0;
                unsigned long queue_tid_bitmap;

                spin_lock_bh(&mvm->queue_info_lock);
                queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;

                /* If TXQ isn't in active use anyway - nothing to do here... */
                if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
                    mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED) {
                        spin_unlock_bh(&mvm->queue_info_lock);
                        continue;
                }

                /* Check to see if there are inactive TIDs on this queue */
                for_each_set_bit(tid, &queue_tid_bitmap,
                                 IWL_MAX_TID_COUNT + 1) {
                        if (time_after(mvm->queue_info[i].last_frame_time[tid] +
                                       IWL_MVM_DQA_QUEUE_TIMEOUT, now))
                                continue;

                        inactive_tid_bitmap |= BIT(tid);
                }
                spin_unlock_bh(&mvm->queue_info_lock);

                /* If all TIDs are active - finish check on this queue */
                if (!inactive_tid_bitmap)
                        continue;

                /*
                 * If we are here - the queue hadn't been served recently and is
                 * in use
                 */

                sta_id = mvm->queue_info[i].ra_sta_id;
                sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);

                /*
                 * If the STA doesn't exist anymore, it isn't an error. It could
                 * be that it was removed since getting the queues, and in this
                 * case it should've inactivated its queues anyway.
                 */
                if (IS_ERR_OR_NULL(sta))
                        continue;

                mvmsta = iwl_mvm_sta_from_mac80211(sta);

                spin_lock_bh(&mvmsta->lock);
                spin_lock(&mvm->queue_info_lock);
                iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
                                             inactive_tid_bitmap);
                spin_unlock(&mvm->queue_info_lock);
                spin_unlock_bh(&mvmsta->lock);
        }

        rcu_read_unlock();
}

void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, u32 *gp2, u64 *boottime)
{
        bool ps_disabled;

        lockdep_assert_held(&mvm->mutex);

        /* Disable power save when reading GP2 */
        ps_disabled = mvm->ps_disabled;
        if (!ps_disabled) {
                mvm->ps_disabled = true;
                iwl_mvm_power_update_device(mvm);
        }

        *gp2 = iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG);
        *boottime = ktime_get_boot_ns();

        if (!ps_disabled) {
                mvm->ps_disabled = ps_disabled;
                iwl_mvm_power_update_device(mvm);
        }
}

int iwl_mvm_send_lqm_cmd(struct ieee80211_vif *vif,
                         enum iwl_lqm_cmd_operatrions operation,
                         u32 duration, u32 timeout)
{
        struct iwl_mvm_vif *mvm_vif = iwl_mvm_vif_from_mac80211(vif);
        struct iwl_link_qual_msrmnt_cmd cmd = {
                .cmd_operation = cpu_to_le32(operation),
                .mac_id = cpu_to_le32(mvm_vif->id),
                .measurement_time = cpu_to_le32(duration),
                .timeout = cpu_to_le32(timeout),
        };
        u32 cmdid =
                iwl_cmd_id(LINK_QUALITY_MEASUREMENT_CMD, MAC_CONF_GROUP, 0);
        int ret;

        if (!fw_has_capa(&mvm_vif->mvm->fw->ucode_capa,
                         IWL_UCODE_TLV_CAPA_LQM_SUPPORT))
                return -EOPNOTSUPP;

        if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
                return -EINVAL;

        switch (operation) {
        case LQM_CMD_OPERATION_START_MEASUREMENT:
                if (iwl_mvm_lqm_active(mvm_vif->mvm))
                        return -EBUSY;
                if (!vif->bss_conf.assoc)
                        return -EINVAL;
                mvm_vif->lqm_active = true;
                break;
        case LQM_CMD_OPERATION_STOP_MEASUREMENT:
                if (!iwl_mvm_lqm_active(mvm_vif->mvm))
                        return -EINVAL;
                break;
        default:
                return -EINVAL;
        }

        ret = iwl_mvm_send_cmd_pdu(mvm_vif->mvm, cmdid, 0, sizeof(cmd),
                                   &cmd);

        /* command failed - roll back lqm_active state */
        if (ret) {
                mvm_vif->lqm_active =
                        operation == LQM_CMD_OPERATION_STOP_MEASUREMENT;
        }

        return ret;
}

static void iwl_mvm_lqm_active_iterator(void *_data, u8 *mac,
                                        struct ieee80211_vif *vif)
{
        struct iwl_mvm_vif *mvm_vif = iwl_mvm_vif_from_mac80211(vif);
        bool *lqm_active = _data;

        *lqm_active = *lqm_active || mvm_vif->lqm_active;
}

bool iwl_mvm_lqm_active(struct iwl_mvm *mvm)
{
        bool ret = false;

        lockdep_assert_held(&mvm->mutex);
        ieee80211_iterate_active_interfaces_atomic(
                mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
                iwl_mvm_lqm_active_iterator, &ret);

        return ret;
}