160 lines
4.2 KiB
C
160 lines
4.2 KiB
C
/*
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* Copyright (c) 2012 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "core.h"
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#include "cfg80211.h"
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#include "debug.h"
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static void ath6kl_recovery_work(struct work_struct *work)
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{
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struct ath6kl *ar = container_of(work, struct ath6kl,
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fw_recovery.recovery_work);
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ar->state = ATH6KL_STATE_RECOVERY;
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del_timer_sync(&ar->fw_recovery.hb_timer);
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ath6kl_init_hw_restart(ar);
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ar->state = ATH6KL_STATE_ON;
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clear_bit(WMI_CTRL_EP_FULL, &ar->flag);
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ar->fw_recovery.err_reason = 0;
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if (ar->fw_recovery.hb_poll)
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mod_timer(&ar->fw_recovery.hb_timer, jiffies +
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msecs_to_jiffies(ar->fw_recovery.hb_poll));
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}
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void ath6kl_recovery_err_notify(struct ath6kl *ar, enum ath6kl_fw_err reason)
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{
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if (!ar->fw_recovery.enable)
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return;
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ath6kl_dbg(ATH6KL_DBG_RECOVERY, "Fw error detected, reason:%d\n",
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reason);
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set_bit(reason, &ar->fw_recovery.err_reason);
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if (!test_bit(RECOVERY_CLEANUP, &ar->flag) &&
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ar->state != ATH6KL_STATE_RECOVERY)
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queue_work(ar->ath6kl_wq, &ar->fw_recovery.recovery_work);
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}
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void ath6kl_recovery_hb_event(struct ath6kl *ar, u32 cookie)
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{
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if (cookie == ar->fw_recovery.seq_num)
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ar->fw_recovery.hb_pending = false;
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}
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static void ath6kl_recovery_hb_timer(struct timer_list *t)
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{
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struct ath6kl *ar = from_timer(ar, t, fw_recovery.hb_timer);
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int err;
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if (test_bit(RECOVERY_CLEANUP, &ar->flag) ||
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(ar->state == ATH6KL_STATE_RECOVERY))
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return;
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if (ar->fw_recovery.hb_pending)
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ar->fw_recovery.hb_misscnt++;
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else
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ar->fw_recovery.hb_misscnt = 0;
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if (ar->fw_recovery.hb_misscnt > ATH6KL_HB_RESP_MISS_THRES) {
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ar->fw_recovery.hb_misscnt = 0;
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ar->fw_recovery.seq_num = 0;
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ar->fw_recovery.hb_pending = false;
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ath6kl_recovery_err_notify(ar, ATH6KL_FW_HB_RESP_FAILURE);
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return;
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}
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ar->fw_recovery.seq_num++;
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ar->fw_recovery.hb_pending = true;
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err = ath6kl_wmi_get_challenge_resp_cmd(ar->wmi,
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ar->fw_recovery.seq_num, 0);
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if (err)
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ath6kl_warn("Failed to send hb challenge request, err:%d\n",
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err);
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mod_timer(&ar->fw_recovery.hb_timer, jiffies +
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msecs_to_jiffies(ar->fw_recovery.hb_poll));
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}
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void ath6kl_recovery_init(struct ath6kl *ar)
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{
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struct ath6kl_fw_recovery *recovery = &ar->fw_recovery;
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clear_bit(RECOVERY_CLEANUP, &ar->flag);
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INIT_WORK(&recovery->recovery_work, ath6kl_recovery_work);
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recovery->seq_num = 0;
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recovery->hb_misscnt = 0;
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ar->fw_recovery.hb_pending = false;
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timer_setup(&ar->fw_recovery.hb_timer, ath6kl_recovery_hb_timer,
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TIMER_DEFERRABLE);
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if (ar->fw_recovery.hb_poll)
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mod_timer(&ar->fw_recovery.hb_timer, jiffies +
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msecs_to_jiffies(ar->fw_recovery.hb_poll));
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}
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void ath6kl_recovery_cleanup(struct ath6kl *ar)
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{
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if (!ar->fw_recovery.enable)
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return;
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set_bit(RECOVERY_CLEANUP, &ar->flag);
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del_timer_sync(&ar->fw_recovery.hb_timer);
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cancel_work_sync(&ar->fw_recovery.recovery_work);
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}
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void ath6kl_recovery_suspend(struct ath6kl *ar)
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{
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if (!ar->fw_recovery.enable)
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return;
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ath6kl_recovery_cleanup(ar);
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if (!ar->fw_recovery.err_reason)
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return;
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/* Process pending fw error detection */
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ar->fw_recovery.err_reason = 0;
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WARN_ON(ar->state != ATH6KL_STATE_ON);
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ar->state = ATH6KL_STATE_RECOVERY;
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ath6kl_init_hw_restart(ar);
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ar->state = ATH6KL_STATE_ON;
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}
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void ath6kl_recovery_resume(struct ath6kl *ar)
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{
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if (!ar->fw_recovery.enable)
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return;
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clear_bit(RECOVERY_CLEANUP, &ar->flag);
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if (!ar->fw_recovery.hb_poll)
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return;
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ar->fw_recovery.hb_pending = false;
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ar->fw_recovery.seq_num = 0;
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ar->fw_recovery.hb_misscnt = 0;
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mod_timer(&ar->fw_recovery.hb_timer,
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jiffies + msecs_to_jiffies(ar->fw_recovery.hb_poll));
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}
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