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