184caf800SVasanthakumar Thiagarajan /*
284caf800SVasanthakumar Thiagarajan * Copyright (c) 2012 Qualcomm Atheros, Inc.
384caf800SVasanthakumar Thiagarajan *
484caf800SVasanthakumar Thiagarajan * Permission to use, copy, modify, and/or distribute this software for any
584caf800SVasanthakumar Thiagarajan * purpose with or without fee is hereby granted, provided that the above
684caf800SVasanthakumar Thiagarajan * copyright notice and this permission notice appear in all copies.
784caf800SVasanthakumar Thiagarajan *
884caf800SVasanthakumar Thiagarajan * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
984caf800SVasanthakumar Thiagarajan * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1084caf800SVasanthakumar Thiagarajan * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
1184caf800SVasanthakumar Thiagarajan * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1284caf800SVasanthakumar Thiagarajan * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
1384caf800SVasanthakumar Thiagarajan * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1484caf800SVasanthakumar Thiagarajan * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1584caf800SVasanthakumar Thiagarajan */
1684caf800SVasanthakumar Thiagarajan
1784caf800SVasanthakumar Thiagarajan #include "core.h"
1884caf800SVasanthakumar Thiagarajan #include "cfg80211.h"
1984caf800SVasanthakumar Thiagarajan #include "debug.h"
2084caf800SVasanthakumar Thiagarajan
ath6kl_recovery_work(struct work_struct * work)2184caf800SVasanthakumar Thiagarajan static void ath6kl_recovery_work(struct work_struct *work)
2284caf800SVasanthakumar Thiagarajan {
2384caf800SVasanthakumar Thiagarajan struct ath6kl *ar = container_of(work, struct ath6kl,
2484caf800SVasanthakumar Thiagarajan fw_recovery.recovery_work);
2584caf800SVasanthakumar Thiagarajan
2692332993SVasanthakumar Thiagarajan ar->state = ATH6KL_STATE_RECOVERY;
2792332993SVasanthakumar Thiagarajan
2892332993SVasanthakumar Thiagarajan del_timer_sync(&ar->fw_recovery.hb_timer);
2992332993SVasanthakumar Thiagarajan
3084caf800SVasanthakumar Thiagarajan ath6kl_init_hw_restart(ar);
3192332993SVasanthakumar Thiagarajan
3292332993SVasanthakumar Thiagarajan ar->state = ATH6KL_STATE_ON;
3377565794SVasanthakumar Thiagarajan clear_bit(WMI_CTRL_EP_FULL, &ar->flag);
3477565794SVasanthakumar Thiagarajan
3592332993SVasanthakumar Thiagarajan ar->fw_recovery.err_reason = 0;
3692332993SVasanthakumar Thiagarajan
379d918840SVasanthakumar Thiagarajan if (ar->fw_recovery.hb_poll)
3892332993SVasanthakumar Thiagarajan mod_timer(&ar->fw_recovery.hb_timer, jiffies +
3992332993SVasanthakumar Thiagarajan msecs_to_jiffies(ar->fw_recovery.hb_poll));
4084caf800SVasanthakumar Thiagarajan }
4184caf800SVasanthakumar Thiagarajan
ath6kl_recovery_err_notify(struct ath6kl * ar,enum ath6kl_fw_err reason)4284caf800SVasanthakumar Thiagarajan void ath6kl_recovery_err_notify(struct ath6kl *ar, enum ath6kl_fw_err reason)
4384caf800SVasanthakumar Thiagarajan {
4466ddcc39SVasanthakumar Thiagarajan if (!ar->fw_recovery.enable)
4566ddcc39SVasanthakumar Thiagarajan return;
4666ddcc39SVasanthakumar Thiagarajan
4784caf800SVasanthakumar Thiagarajan ath6kl_dbg(ATH6KL_DBG_RECOVERY, "Fw error detected, reason:%d\n",
4884caf800SVasanthakumar Thiagarajan reason);
4984caf800SVasanthakumar Thiagarajan
5084caf800SVasanthakumar Thiagarajan set_bit(reason, &ar->fw_recovery.err_reason);
5184caf800SVasanthakumar Thiagarajan
52a3561706SVasanthakumar Thiagarajan if (!test_bit(RECOVERY_CLEANUP, &ar->flag) &&
53a3561706SVasanthakumar Thiagarajan ar->state != ATH6KL_STATE_RECOVERY)
5484caf800SVasanthakumar Thiagarajan queue_work(ar->ath6kl_wq, &ar->fw_recovery.recovery_work);
5584caf800SVasanthakumar Thiagarajan }
5684caf800SVasanthakumar Thiagarajan
ath6kl_recovery_hb_event(struct ath6kl * ar,u32 cookie)5792332993SVasanthakumar Thiagarajan void ath6kl_recovery_hb_event(struct ath6kl *ar, u32 cookie)
5892332993SVasanthakumar Thiagarajan {
5992332993SVasanthakumar Thiagarajan if (cookie == ar->fw_recovery.seq_num)
6092332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_pending = false;
6192332993SVasanthakumar Thiagarajan }
6292332993SVasanthakumar Thiagarajan
ath6kl_recovery_hb_timer(struct timer_list * t)63df7e828cSKees Cook static void ath6kl_recovery_hb_timer(struct timer_list *t)
6492332993SVasanthakumar Thiagarajan {
65df7e828cSKees Cook struct ath6kl *ar = from_timer(ar, t, fw_recovery.hb_timer);
6692332993SVasanthakumar Thiagarajan int err;
6792332993SVasanthakumar Thiagarajan
68a3561706SVasanthakumar Thiagarajan if (test_bit(RECOVERY_CLEANUP, &ar->flag) ||
69a3561706SVasanthakumar Thiagarajan (ar->state == ATH6KL_STATE_RECOVERY))
7092332993SVasanthakumar Thiagarajan return;
7192332993SVasanthakumar Thiagarajan
7292332993SVasanthakumar Thiagarajan if (ar->fw_recovery.hb_pending)
7392332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_misscnt++;
7492332993SVasanthakumar Thiagarajan else
7592332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_misscnt = 0;
7692332993SVasanthakumar Thiagarajan
7792332993SVasanthakumar Thiagarajan if (ar->fw_recovery.hb_misscnt > ATH6KL_HB_RESP_MISS_THRES) {
7892332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_misscnt = 0;
7992332993SVasanthakumar Thiagarajan ar->fw_recovery.seq_num = 0;
8092332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_pending = false;
8192332993SVasanthakumar Thiagarajan ath6kl_recovery_err_notify(ar, ATH6KL_FW_HB_RESP_FAILURE);
8292332993SVasanthakumar Thiagarajan return;
8392332993SVasanthakumar Thiagarajan }
8492332993SVasanthakumar Thiagarajan
8592332993SVasanthakumar Thiagarajan ar->fw_recovery.seq_num++;
8692332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_pending = true;
8792332993SVasanthakumar Thiagarajan
8892332993SVasanthakumar Thiagarajan err = ath6kl_wmi_get_challenge_resp_cmd(ar->wmi,
8992332993SVasanthakumar Thiagarajan ar->fw_recovery.seq_num, 0);
9092332993SVasanthakumar Thiagarajan if (err)
9192332993SVasanthakumar Thiagarajan ath6kl_warn("Failed to send hb challenge request, err:%d\n",
9292332993SVasanthakumar Thiagarajan err);
9392332993SVasanthakumar Thiagarajan
9492332993SVasanthakumar Thiagarajan mod_timer(&ar->fw_recovery.hb_timer, jiffies +
9592332993SVasanthakumar Thiagarajan msecs_to_jiffies(ar->fw_recovery.hb_poll));
9692332993SVasanthakumar Thiagarajan }
9792332993SVasanthakumar Thiagarajan
ath6kl_recovery_init(struct ath6kl * ar)9884caf800SVasanthakumar Thiagarajan void ath6kl_recovery_init(struct ath6kl *ar)
9984caf800SVasanthakumar Thiagarajan {
10084caf800SVasanthakumar Thiagarajan struct ath6kl_fw_recovery *recovery = &ar->fw_recovery;
10184caf800SVasanthakumar Thiagarajan
102a3561706SVasanthakumar Thiagarajan clear_bit(RECOVERY_CLEANUP, &ar->flag);
10384caf800SVasanthakumar Thiagarajan INIT_WORK(&recovery->recovery_work, ath6kl_recovery_work);
10492332993SVasanthakumar Thiagarajan recovery->seq_num = 0;
10592332993SVasanthakumar Thiagarajan recovery->hb_misscnt = 0;
10692332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_pending = false;
107df7e828cSKees Cook timer_setup(&ar->fw_recovery.hb_timer, ath6kl_recovery_hb_timer,
108df7e828cSKees Cook TIMER_DEFERRABLE);
10992332993SVasanthakumar Thiagarajan
11092332993SVasanthakumar Thiagarajan if (ar->fw_recovery.hb_poll)
11192332993SVasanthakumar Thiagarajan mod_timer(&ar->fw_recovery.hb_timer, jiffies +
11292332993SVasanthakumar Thiagarajan msecs_to_jiffies(ar->fw_recovery.hb_poll));
11384caf800SVasanthakumar Thiagarajan }
11484caf800SVasanthakumar Thiagarajan
ath6kl_recovery_cleanup(struct ath6kl * ar)11584caf800SVasanthakumar Thiagarajan void ath6kl_recovery_cleanup(struct ath6kl *ar)
11684caf800SVasanthakumar Thiagarajan {
11766ddcc39SVasanthakumar Thiagarajan if (!ar->fw_recovery.enable)
11866ddcc39SVasanthakumar Thiagarajan return;
11966ddcc39SVasanthakumar Thiagarajan
120a3561706SVasanthakumar Thiagarajan set_bit(RECOVERY_CLEANUP, &ar->flag);
12184caf800SVasanthakumar Thiagarajan
12292332993SVasanthakumar Thiagarajan del_timer_sync(&ar->fw_recovery.hb_timer);
12384caf800SVasanthakumar Thiagarajan cancel_work_sync(&ar->fw_recovery.recovery_work);
12484caf800SVasanthakumar Thiagarajan }
12584caf800SVasanthakumar Thiagarajan
ath6kl_recovery_suspend(struct ath6kl * ar)12684caf800SVasanthakumar Thiagarajan void ath6kl_recovery_suspend(struct ath6kl *ar)
12784caf800SVasanthakumar Thiagarajan {
12866ddcc39SVasanthakumar Thiagarajan if (!ar->fw_recovery.enable)
12966ddcc39SVasanthakumar Thiagarajan return;
13066ddcc39SVasanthakumar Thiagarajan
13184caf800SVasanthakumar Thiagarajan ath6kl_recovery_cleanup(ar);
13284caf800SVasanthakumar Thiagarajan
13392332993SVasanthakumar Thiagarajan if (!ar->fw_recovery.err_reason)
13492332993SVasanthakumar Thiagarajan return;
13592332993SVasanthakumar Thiagarajan
13684caf800SVasanthakumar Thiagarajan /* Process pending fw error detection */
13792332993SVasanthakumar Thiagarajan ar->fw_recovery.err_reason = 0;
13892332993SVasanthakumar Thiagarajan WARN_ON(ar->state != ATH6KL_STATE_ON);
13992332993SVasanthakumar Thiagarajan ar->state = ATH6KL_STATE_RECOVERY;
14084caf800SVasanthakumar Thiagarajan ath6kl_init_hw_restart(ar);
14192332993SVasanthakumar Thiagarajan ar->state = ATH6KL_STATE_ON;
14292332993SVasanthakumar Thiagarajan }
14392332993SVasanthakumar Thiagarajan
ath6kl_recovery_resume(struct ath6kl * ar)14492332993SVasanthakumar Thiagarajan void ath6kl_recovery_resume(struct ath6kl *ar)
14592332993SVasanthakumar Thiagarajan {
14666ddcc39SVasanthakumar Thiagarajan if (!ar->fw_recovery.enable)
14766ddcc39SVasanthakumar Thiagarajan return;
14866ddcc39SVasanthakumar Thiagarajan
149a3561706SVasanthakumar Thiagarajan clear_bit(RECOVERY_CLEANUP, &ar->flag);
15092332993SVasanthakumar Thiagarajan
15192332993SVasanthakumar Thiagarajan if (!ar->fw_recovery.hb_poll)
15292332993SVasanthakumar Thiagarajan return;
15392332993SVasanthakumar Thiagarajan
15492332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_pending = false;
15592332993SVasanthakumar Thiagarajan ar->fw_recovery.seq_num = 0;
15692332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_misscnt = 0;
15792332993SVasanthakumar Thiagarajan mod_timer(&ar->fw_recovery.hb_timer,
15892332993SVasanthakumar Thiagarajan jiffies + msecs_to_jiffies(ar->fw_recovery.hb_poll));
15984caf800SVasanthakumar Thiagarajan }
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