343 lines
9.0 KiB
C
343 lines
9.0 KiB
C
/****************************************************************************
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* drivers/virtio/virtio.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <debug.h>
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#include <nuttx/nuttx.h>
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#include <nuttx/mutex.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/virtio/virtio.h>
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#include "virtio-blk.h"
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#include "virtio-gpu.h"
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#include "virtio-input.h"
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#include "virtio-net.h"
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#include "virtio-rng.h"
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#include "virtio-rpmb.h"
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#include "virtio-serial.h"
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#include "virtio-snd.h"
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct virtio_bus_s
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{
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mutex_t lock; /* Lock for the list */
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struct list_node device; /* Wait match virtio device list */
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struct list_node driver; /* Virtio driver list */
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};
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struct virtio_device_item_s
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{
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struct list_node node; /* list node */
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struct virtio_device *device; /* Pointer to the virtio device */
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struct virtio_driver *driver; /* Pointer to the virtio driver that
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* matched with current virtio device
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*/
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};
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static struct virtio_bus_s g_virtio_bus =
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{
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NXMUTEX_INITIALIZER,
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LIST_INITIAL_VALUE(g_virtio_bus.device),
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LIST_INITIAL_VALUE(g_virtio_bus.driver),
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};
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: virtio_register_drivers
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****************************************************************************/
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void virtio_register_drivers(void)
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{
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struct metal_init_params params = METAL_INIT_DEFAULTS;
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int ret = OK;
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ret = metal_init(¶ms);
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if (ret < 0)
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{
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vrterr("metal_init failed, ret=%d\n", ret);
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}
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#ifdef CONFIG_DRIVERS_VIRTIO_BLK
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ret = virtio_register_blk_driver();
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if (ret < 0)
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{
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vrterr("virtio_register_blk_driver failed, ret=%d\n", ret);
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}
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#endif
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#ifdef CONFIG_DRIVERS_VIRTIO_GPU
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ret = virtio_register_gpu_driver();
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if (ret < 0)
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{
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vrterr("virtio_register_gpu_driver failed, ret=%d\n", ret);
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}
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#endif
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#ifdef CONFIG_DRIVERS_VIRTIO_INPUT
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ret = virtio_register_input_driver();
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if (ret < 0)
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{
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vrterr("virtio_register_input_driver failed, ret=%d\n", ret);
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}
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#endif
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#ifdef CONFIG_DRIVERS_VIRTIO_NET
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ret = virtio_register_net_driver();
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if (ret < 0)
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{
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vrterr("virtio_register_net_driver failed, ret=%d\n", ret);
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}
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#endif
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#ifdef CONFIG_DRIVERS_VIRTIO_RNG
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ret = virtio_register_rng_driver();
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if (ret < 0)
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{
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vrterr("virtio_register_rng_driver failed, ret=%d\n", ret);
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}
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#endif
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#ifdef CONFIG_DRIVERS_VIRTIO_SERIAL
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ret = virtio_register_serial_driver();
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if (ret < 0)
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{
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vrterr("virtio_register_serial_driver failed, ret=%d\n", ret);
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}
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#endif
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#ifdef CONFIG_DRIVERS_VIRTIO_SOUND
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ret = virtio_register_snd_driver();
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if (ret < 0)
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{
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vrterr("virtio_register_snd_driver failed, ret=%d\n", ret);
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}
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#endif
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#ifdef CONFIG_DRIVERS_VIRTIO_RPMB
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ret = virtio_register_rpmb_driver();
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if (ret < 0)
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{
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vrterr("virtio_register_rpmb_driver failed, ret=%d\n", ret);
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}
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#endif
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UNUSED(ret);
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}
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/****************************************************************************
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* Name: virtio_register_driver
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****************************************************************************/
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int virtio_register_driver(FAR struct virtio_driver *driver)
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{
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FAR struct list_node *node;
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int ret;
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DEBUGASSERT(driver != NULL && driver->probe != NULL &&
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driver->remove != NULL);
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ret = nxmutex_lock(&g_virtio_bus.lock);
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if (ret < 0)
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{
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return ret;
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}
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/* Add the driver to the virtio_bus driver list */
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list_add_tail(&g_virtio_bus.driver, &driver->node);
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/* Match all the devices has registered in the virtio_bus */
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list_for_every(&g_virtio_bus.device, node)
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{
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FAR struct virtio_device_item_s *item =
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container_of(node, struct virtio_device_item_s, node);
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FAR struct virtio_device *device = item->device;
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if (item->driver == NULL && driver->device == device->id.device)
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{
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/* If found the device in the device list, call driver probe,
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* if probe success, assign item->driver to indicate the device
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* matched.
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*/
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device->priv = driver;
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if (driver->probe(device) >= 0)
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{
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item->driver = driver;
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}
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}
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}
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nxmutex_unlock(&g_virtio_bus.lock);
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return ret;
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}
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/****************************************************************************
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* Name: virtio_unregister_driver
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****************************************************************************/
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int virtio_unregister_driver(FAR struct virtio_driver *driver)
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{
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FAR struct list_node *node;
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int ret;
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DEBUGASSERT(driver != NULL);
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ret = nxmutex_lock(&g_virtio_bus.lock);
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if (ret < 0)
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{
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return ret;
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}
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/* Find all the devices matched with driver in device list */
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list_for_every(&g_virtio_bus.device, node)
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{
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FAR struct virtio_device_item_s *item =
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container_of(node, struct virtio_device_item_s, node);
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if (item->driver == driver)
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{
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/* 1. Call driver remove function;
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* 2. Mark item->driver NULL to indicate the device unmatched;
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*/
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driver->remove(item->device);
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item->driver = NULL;
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}
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}
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/* Remove the driver from the driver list */
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list_delete(&driver->node);
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nxmutex_unlock(&g_virtio_bus.lock);
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return ret;
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}
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/****************************************************************************
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* Name: virtio_register_device
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****************************************************************************/
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int virtio_register_device(FAR struct virtio_device *device)
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{
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FAR struct virtio_device_item_s *item;
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FAR struct list_node *node;
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int ret;
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item = kmm_zalloc(sizeof(*item));
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if (item == NULL)
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{
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return -ENOMEM;
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}
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item->device = device;
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ret = nxmutex_lock(&g_virtio_bus.lock);
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if (ret < 0)
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{
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kmm_free(item);
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return ret;
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}
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/* Add the device to the virtio_bus device list */
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list_add_tail(&g_virtio_bus.device, &item->node);
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/* Match the driver has registered in the virtio_bus */
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list_for_every(&g_virtio_bus.driver, node)
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{
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FAR struct virtio_driver *driver =
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container_of(node, struct virtio_driver, node);
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if (driver->device == device->id.device)
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{
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/* If found the driver in the driver list, call driver probe,
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* if probe success, assign item->driver to indicate the device
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* matched.
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*/
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device->priv = driver;
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if (driver->probe(device) >= 0)
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{
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item->driver = driver;
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break;
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}
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}
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}
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nxmutex_unlock(&g_virtio_bus.lock);
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return ret;
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}
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/****************************************************************************
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* Name: virtio_unregister_device
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****************************************************************************/
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int virtio_unregister_device(FAR struct virtio_device *device)
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{
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FAR struct list_node *node;
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int ret;
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ret = nxmutex_lock(&g_virtio_bus.lock);
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if (ret < 0)
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{
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return ret;
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}
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/* Find the device in device list */
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list_for_every(&g_virtio_bus.device, node)
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{
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FAR struct virtio_device_item_s *item =
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container_of(node, struct virtio_device_item_s, node);
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if (item->device == device)
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{
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/* Call driver remove */
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if (item->driver)
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{
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item->driver->remove(device);
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}
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/* Remove the device from the device list and free memory */
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list_delete(&item->node);
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kmm_free(item);
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break;
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}
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}
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nxmutex_unlock(&g_virtio_bus.lock);
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return ret;
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}
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