84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
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/* Copyright 2018 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "chip/mt_scp/ipi_chip.h"
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#include "chip/mt_scp/registers.h"
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#include "console.h"
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#include "hooks.h"
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#include "task.h"
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#include "util.h"
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#include "fd.h"
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#include "queue.h"
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#include "queue_policies.h"
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#define CPRINTF(format, args...) cprintf(CC_IPI, format, ##args)
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#define CPRINTS(format, args...) cprints(CC_IPI, format, ##args)
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/* Forwad declaration. */
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static struct consumer const event_fd_consumer;
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static void event_fd_written(struct consumer const *consumer, size_t count);
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static struct queue const fd_queue = QUEUE_DIRECT(4, struct fd_msg,
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null_producer,
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event_fd_consumer);
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static struct consumer const event_fd_consumer = {
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.queue = &fd_queue,
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.ops = &((struct consumer_ops const) {
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.written = event_fd_written,
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}),
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};
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/* Stub functions only provided by private overlays. */
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// Jerry TODO implement private part and remove this
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#ifndef HAVE_PRIVATE_MT8183
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void fd_ipi_msg_handler(void *data) {}
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#endif
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static void event_fd_written(struct consumer const *consumer, size_t count)
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{
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task_wake(TASK_ID_FD_SERVICE);
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}
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static void fd_ipi_handler(int id, void *data, uint32_t len)
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{
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struct fd_msg rsv_msg;
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if (!len)
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return;
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rsv_msg.type = IPI_FD_CMD;
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memcpy(rsv_msg.msg, data, MIN(len, sizeof(rsv_msg.msg)));
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/*
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* If there is no other IPI handler touch this queue, we don't need to
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* interrupt_disable() or task_disable_irq().
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*/
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if (!queue_add_unit(&fd_queue, &rsv_msg))
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CPRINTS("Could not send fd %d to the queue.", rsv_msg.type);
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}
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DECLARE_IPI(IPI_FD_CMD, fd_ipi_handler, 0);
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/* This function renames from fd_service_entry. */
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void fd_service_task(void *u)
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{
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struct fd_msg rsv_msg;
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size_t size;
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while (1) {
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/*
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* Queue unit is added in IPI handler, which is in ISR context.
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* Disable IRQ to prevent a clobbered queue.
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*/
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ipi_disable_irq(SCP_IRQ_IPC0);
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size = queue_remove_unit(&fd_queue, &rsv_msg);
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ipi_enable_irq(SCP_IRQ_IPC0);
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if (!size)
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task_wait_event(-1);
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else
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fd_ipi_msg_handler(rsv_msg.msg);
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}
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}
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