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 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 4284caf800SVasanthakumar Thiagarajan void ath6kl_recovery_err_notify(struct ath6kl *ar, enum ath6kl_fw_err reason) 4384caf800SVasanthakumar Thiagarajan { 4484caf800SVasanthakumar Thiagarajan ath6kl_dbg(ATH6KL_DBG_RECOVERY, "Fw error detected, reason:%d\n", 4584caf800SVasanthakumar Thiagarajan reason); 4684caf800SVasanthakumar Thiagarajan 4784caf800SVasanthakumar Thiagarajan set_bit(reason, &ar->fw_recovery.err_reason); 4884caf800SVasanthakumar Thiagarajan 49a3561706SVasanthakumar Thiagarajan if (!test_bit(RECOVERY_CLEANUP, &ar->flag) && 50a3561706SVasanthakumar Thiagarajan ar->state != ATH6KL_STATE_RECOVERY) 5184caf800SVasanthakumar Thiagarajan queue_work(ar->ath6kl_wq, &ar->fw_recovery.recovery_work); 5284caf800SVasanthakumar Thiagarajan } 5384caf800SVasanthakumar Thiagarajan 5492332993SVasanthakumar Thiagarajan void ath6kl_recovery_hb_event(struct ath6kl *ar, u32 cookie) 5592332993SVasanthakumar Thiagarajan { 5692332993SVasanthakumar Thiagarajan if (cookie == ar->fw_recovery.seq_num) 5792332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_pending = false; 5892332993SVasanthakumar Thiagarajan } 5992332993SVasanthakumar Thiagarajan 6092332993SVasanthakumar Thiagarajan static void ath6kl_recovery_hb_timer(unsigned long data) 6192332993SVasanthakumar Thiagarajan { 6292332993SVasanthakumar Thiagarajan struct ath6kl *ar = (struct ath6kl *) data; 6392332993SVasanthakumar Thiagarajan int err; 6492332993SVasanthakumar Thiagarajan 65a3561706SVasanthakumar Thiagarajan if (test_bit(RECOVERY_CLEANUP, &ar->flag) || 66a3561706SVasanthakumar Thiagarajan (ar->state == ATH6KL_STATE_RECOVERY)) 6792332993SVasanthakumar Thiagarajan return; 6892332993SVasanthakumar Thiagarajan 6992332993SVasanthakumar Thiagarajan if (ar->fw_recovery.hb_pending) 7092332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_misscnt++; 7192332993SVasanthakumar Thiagarajan else 7292332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_misscnt = 0; 7392332993SVasanthakumar Thiagarajan 7492332993SVasanthakumar Thiagarajan if (ar->fw_recovery.hb_misscnt > ATH6KL_HB_RESP_MISS_THRES) { 7592332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_misscnt = 0; 7692332993SVasanthakumar Thiagarajan ar->fw_recovery.seq_num = 0; 7792332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_pending = false; 7892332993SVasanthakumar Thiagarajan ath6kl_recovery_err_notify(ar, ATH6KL_FW_HB_RESP_FAILURE); 7992332993SVasanthakumar Thiagarajan return; 8092332993SVasanthakumar Thiagarajan } 8192332993SVasanthakumar Thiagarajan 8292332993SVasanthakumar Thiagarajan ar->fw_recovery.seq_num++; 8392332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_pending = true; 8492332993SVasanthakumar Thiagarajan 8592332993SVasanthakumar Thiagarajan err = ath6kl_wmi_get_challenge_resp_cmd(ar->wmi, 8692332993SVasanthakumar Thiagarajan ar->fw_recovery.seq_num, 0); 8792332993SVasanthakumar Thiagarajan if (err) 8892332993SVasanthakumar Thiagarajan ath6kl_warn("Failed to send hb challenge request, err:%d\n", 8992332993SVasanthakumar Thiagarajan err); 9092332993SVasanthakumar Thiagarajan 9192332993SVasanthakumar Thiagarajan mod_timer(&ar->fw_recovery.hb_timer, jiffies + 9292332993SVasanthakumar Thiagarajan msecs_to_jiffies(ar->fw_recovery.hb_poll)); 9392332993SVasanthakumar Thiagarajan } 9492332993SVasanthakumar Thiagarajan 9584caf800SVasanthakumar Thiagarajan void ath6kl_recovery_init(struct ath6kl *ar) 9684caf800SVasanthakumar Thiagarajan { 9784caf800SVasanthakumar Thiagarajan struct ath6kl_fw_recovery *recovery = &ar->fw_recovery; 9884caf800SVasanthakumar Thiagarajan 99a3561706SVasanthakumar Thiagarajan clear_bit(RECOVERY_CLEANUP, &ar->flag); 10084caf800SVasanthakumar Thiagarajan INIT_WORK(&recovery->recovery_work, ath6kl_recovery_work); 10192332993SVasanthakumar Thiagarajan recovery->seq_num = 0; 10292332993SVasanthakumar Thiagarajan recovery->hb_misscnt = 0; 10392332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_pending = false; 10492332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_timer.function = ath6kl_recovery_hb_timer; 10592332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_timer.data = (unsigned long) ar; 10692332993SVasanthakumar Thiagarajan init_timer_deferrable(&ar->fw_recovery.hb_timer); 10792332993SVasanthakumar Thiagarajan 10892332993SVasanthakumar Thiagarajan if (ar->fw_recovery.hb_poll) 10992332993SVasanthakumar Thiagarajan mod_timer(&ar->fw_recovery.hb_timer, jiffies + 11092332993SVasanthakumar Thiagarajan msecs_to_jiffies(ar->fw_recovery.hb_poll)); 11184caf800SVasanthakumar Thiagarajan } 11284caf800SVasanthakumar Thiagarajan 11384caf800SVasanthakumar Thiagarajan void ath6kl_recovery_cleanup(struct ath6kl *ar) 11484caf800SVasanthakumar Thiagarajan { 115a3561706SVasanthakumar Thiagarajan set_bit(RECOVERY_CLEANUP, &ar->flag); 11684caf800SVasanthakumar Thiagarajan 11792332993SVasanthakumar Thiagarajan del_timer_sync(&ar->fw_recovery.hb_timer); 11884caf800SVasanthakumar Thiagarajan cancel_work_sync(&ar->fw_recovery.recovery_work); 11984caf800SVasanthakumar Thiagarajan } 12084caf800SVasanthakumar Thiagarajan 12184caf800SVasanthakumar Thiagarajan void ath6kl_recovery_suspend(struct ath6kl *ar) 12284caf800SVasanthakumar Thiagarajan { 12384caf800SVasanthakumar Thiagarajan ath6kl_recovery_cleanup(ar); 12484caf800SVasanthakumar Thiagarajan 12592332993SVasanthakumar Thiagarajan if (!ar->fw_recovery.err_reason) 12692332993SVasanthakumar Thiagarajan return; 12792332993SVasanthakumar Thiagarajan 12884caf800SVasanthakumar Thiagarajan /* Process pending fw error detection */ 12992332993SVasanthakumar Thiagarajan ar->fw_recovery.err_reason = 0; 13092332993SVasanthakumar Thiagarajan WARN_ON(ar->state != ATH6KL_STATE_ON); 13192332993SVasanthakumar Thiagarajan ar->state = ATH6KL_STATE_RECOVERY; 13284caf800SVasanthakumar Thiagarajan ath6kl_init_hw_restart(ar); 13392332993SVasanthakumar Thiagarajan ar->state = ATH6KL_STATE_ON; 13492332993SVasanthakumar Thiagarajan } 13592332993SVasanthakumar Thiagarajan 13692332993SVasanthakumar Thiagarajan void ath6kl_recovery_resume(struct ath6kl *ar) 13792332993SVasanthakumar Thiagarajan { 138a3561706SVasanthakumar Thiagarajan clear_bit(RECOVERY_CLEANUP, &ar->flag); 13992332993SVasanthakumar Thiagarajan 14092332993SVasanthakumar Thiagarajan if (!ar->fw_recovery.hb_poll) 14192332993SVasanthakumar Thiagarajan return; 14292332993SVasanthakumar Thiagarajan 14392332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_pending = false; 14492332993SVasanthakumar Thiagarajan ar->fw_recovery.seq_num = 0; 14592332993SVasanthakumar Thiagarajan ar->fw_recovery.hb_misscnt = 0; 14692332993SVasanthakumar Thiagarajan mod_timer(&ar->fw_recovery.hb_timer, 14792332993SVasanthakumar Thiagarajan jiffies + msecs_to_jiffies(ar->fw_recovery.hb_poll)); 14884caf800SVasanthakumar Thiagarajan } 149