137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
/*
|
|
* Copyright (c) 2023 Linaro.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#define DT_DRV_COMPAT linaro_ivshmem_ipm
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <zephyr/device.h>
|
|
#include <zephyr/drivers/ipm.h>
|
|
#include <zephyr/drivers/virtualization/ivshmem.h>
|
|
#include <zephyr/logging/log.h>
|
|
LOG_MODULE_REGISTER(ipm_ivshmem, CONFIG_IPM_LOG_LEVEL);
|
|
|
|
K_THREAD_STACK_DEFINE(ivshmem_ev_loop_stack, CONFIG_IPM_IVSHMEM_EVENT_LOOP_STACK_SIZE);
|
|
static struct k_thread ivshmem_ev_loop_thread;
|
|
|
|
struct ivshmem_ipm_data {
|
|
ipm_callback_t cb;
|
|
void *user_data;
|
|
};
|
|
|
|
struct ivshmem_ipm_config {
|
|
const struct device *ivshmem_dev;
|
|
};
|
|
|
|
static void ivshmem_ipm_event_loop_thread(void *arg, void *p2, void *p3)
|
|
{
|
|
ARG_UNUSED(p2);
|
|
ARG_UNUSED(p3);
|
|
|
|
unsigned int poll_signaled;
|
|
int ivshmem_vector_rx;
|
|
struct k_poll_signal sig;
|
|
struct k_poll_event events[] = {
|
|
K_POLL_EVENT_INITIALIZER(K_POLL_TYPE_SIGNAL,
|
|
K_POLL_MODE_NOTIFY_ONLY,
|
|
&sig),
|
|
};
|
|
|
|
const struct device *dev = (const struct device *)arg;
|
|
struct ivshmem_ipm_data *dev_data = (struct ivshmem_ipm_data *)dev->data;
|
|
struct ivshmem_ipm_config *dev_cfg = (struct ivshmem_ipm_config *)dev->config;
|
|
|
|
k_poll_signal_init(&sig);
|
|
int ret = ivshmem_register_handler(dev_cfg->ivshmem_dev, &sig, 0);
|
|
|
|
if (ret < 0) {
|
|
LOG_ERR("registering handlers must be supported: %d\n", ret);
|
|
k_panic();
|
|
}
|
|
|
|
while (1) {
|
|
LOG_DBG("%s: waiting interrupt from client...\n", __func__);
|
|
ret = k_poll(events, ARRAY_SIZE(events), K_FOREVER);
|
|
|
|
k_poll_signal_check(&sig, &poll_signaled, &ivshmem_vector_rx);
|
|
/* get ready for next signal */
|
|
k_poll_signal_reset(&sig);
|
|
|
|
if (dev_data->cb) {
|
|
dev_data->cb(dev, dev_data->user_data, 0, NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int ivshmem_ipm_send(const struct device *dev, int wait, uint32_t id,
|
|
const void *data, int size)
|
|
{
|
|
ARG_UNUSED(wait);
|
|
ARG_UNUSED(data);
|
|
ARG_UNUSED(size);
|
|
|
|
struct ivshmem_ipm_config *dev_cfg = (struct ivshmem_ipm_config *)dev->config;
|
|
|
|
LOG_DBG("sending notification to the peer id 0x%x\n", id);
|
|
return ivshmem_int_peer(dev_cfg->ivshmem_dev, id, 0);
|
|
}
|
|
|
|
static void ivshmem_ipm_register_callback(const struct device *dev,
|
|
ipm_callback_t cb,
|
|
void *user_data)
|
|
{
|
|
struct ivshmem_ipm_data *dev_data = (struct ivshmem_ipm_data *)dev->data;
|
|
|
|
dev_data->cb = cb;
|
|
dev_data->user_data = user_data;
|
|
}
|
|
|
|
static int ivshmem_ipm_set_enabled(const struct device *dev, int enable)
|
|
{
|
|
/* some subsystems needs this minimal function just return success here*/
|
|
ARG_UNUSED(dev);
|
|
ARG_UNUSED(enable);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ivshmem_ipm_init(const struct device *dev)
|
|
{
|
|
k_thread_create(&ivshmem_ev_loop_thread,
|
|
ivshmem_ev_loop_stack,
|
|
CONFIG_IPM_IVSHMEM_EVENT_LOOP_STACK_SIZE,
|
|
ivshmem_ipm_event_loop_thread,
|
|
(void *)dev, NULL, NULL,
|
|
CONFIG_IPM_IVSHMEM_EVENT_LOOP_PRIO,
|
|
0, K_NO_WAIT);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct ipm_driver_api ivshmem_ipm_driver_api = {
|
|
.send = ivshmem_ipm_send,
|
|
.register_callback = ivshmem_ipm_register_callback,
|
|
.set_enabled = ivshmem_ipm_set_enabled
|
|
};
|
|
|
|
#define IPM_IVSHMEM_INIT(inst) \
|
|
static const struct ivshmem_ipm_config ivshmem_ipm_cfg_##inst = { \
|
|
.ivshmem_dev = \
|
|
DEVICE_DT_GET(DT_INST_PHANDLE(inst, ivshmem))\
|
|
}; \
|
|
static struct ivshmem_ipm_data ivshmem_ipm_data_##inst = { \
|
|
.cb = NULL, \
|
|
.user_data = NULL, \
|
|
}; \
|
|
DEVICE_DT_INST_DEFINE(inst, \
|
|
ivshmem_ipm_init, \
|
|
NULL, \
|
|
&ivshmem_ipm_data_##inst, &ivshmem_ipm_cfg_##inst, \
|
|
POST_KERNEL, CONFIG_APPLICATION_INIT_PRIORITY, \
|
|
&ivshmem_ipm_driver_api); \
|
|
|
|
DT_INST_FOREACH_STATUS_OKAY(IPM_IVSHMEM_INIT);
|