| /* |
| * Copyright (c) 2017, Intel Corporation |
| * 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 of the 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. |
| * |
| * Author: Liam Girdwood <liam.r.girdwood@linux.intel.com> |
| * |
| * System Agent - Simple FW Monitor that can notify host drivers in the event |
| * of any FW errors. The SA assumes that each core will enter the idle state |
| * from time to time (within a period of PLATFORM_IDLE_TIME). If the core does |
| * not enter the idle loop through looping forever or scheduling some work |
| * continuously then the SA will emit trace and panic(). |
| */ |
| |
| #include <sof/sof.h> |
| #include <sof/agent.h> |
| #include <sof/debug.h> |
| #include <sof/panic.h> |
| #include <sof/alloc.h> |
| #include <sof/clock.h> |
| #include <sof/trace.h> |
| #include <platform/timer.h> |
| #include <platform/platform.h> |
| #include <platform/clk.h> |
| |
| #define trace_sa(__e) trace_event_atomic(TRACE_CLASS_SA, __e) |
| #define trace_sa_value(__e) trace_value_atomic(__e) |
| |
| /* |
| * Notify the SA that we are about to enter idle state (WFI). |
| */ |
| void sa_enter_idle(struct sof *sof) |
| { |
| struct sa *sa = sof->sa; |
| |
| sa->last_idle = platform_timer_get(platform_timer); |
| } |
| |
| static uint64_t validate(void *data, uint64_t delay) |
| { |
| struct sa *sa = data; |
| uint64_t current; |
| uint64_t delta; |
| |
| current = platform_timer_get(platform_timer); |
| delta = current - sa->last_idle; |
| |
| /* were we last idle longer than timeout */ |
| if (delta > sa->ticks) { |
| trace_sa("tim"); |
| trace_sa_value(delta); |
| panic(SOF_IPC_PANIC_IDLE); |
| } |
| |
| return PLATFORM_IDLE_TIME; |
| } |
| |
| void sa_init(struct sof *sof) |
| { |
| struct sa *sa; |
| |
| trace_sa("ini"); |
| |
| sa = rzalloc(RZONE_SYS, SOF_MEM_CAPS_RAM, sizeof(*sa)); |
| sof->sa = sa; |
| |
| /* set default tick timout */ |
| sa->ticks = clock_us_to_ticks(PLATFORM_WORKQ_CLOCK, PLATFORM_IDLE_TIME); |
| trace_sa_value(sa->ticks); |
| |
| /* set lst idle time to now to give time for boot completion */ |
| sa->last_idle = platform_timer_get(platform_timer) + sa->ticks; |
| work_init(&sa->work, validate, sa, WORK_ASYNC); |
| work_schedule_default(&sa->work, PLATFORM_IDLE_TIME); |
| } |