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nuttx/drivers/rptun/rptun.c
Petro Karashchenko 41c95da594 register_driver: fix driver modes accross the code 
State of problem:
 - Some drivers that do not support write operations (does not
   have write handler or ioctl do not perform any write actions)
   are registered with write permissions
 - Some drivers that do not support read operation (does not
   have read handler or ioctl do not perform any read actions)
   are registered with read permissions
 - Some drivers are registered with execute permissions

Solution:
 - Iterate code where register_driver() is used and change 'mode'
   parameter to reflect the actual read/write operations executed
   by a driver
 - Remove execute permissions from 'mode' parameter

Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>
2022-02-16 16:15:29 +08:00

1008 lines
24 KiB
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/****************************************************************************
* drivers/rptun/rptun.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <inttypes.h>
#include <stdio.h>
#include <fcntl.h>
#include <nuttx/arch.h>
#include <nuttx/kmalloc.h>
#include <nuttx/kthread.h>
#include <nuttx/semaphore.h>
#include <nuttx/rptun/openamp.h>
#include <nuttx/rptun/rptun.h>
#include <metal/utilities.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef MAX
# define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif
#ifndef ALIGN_UP
# define ALIGN_UP(s, a) (((s) + (a) - 1) & ~((a) - 1))
#endif
#define RPTUNIOC_NONE 0
#define NO_HOLDER (pid_t)-1
/****************************************************************************
* Private Types
****************************************************************************/
struct rptun_priv_s
{
FAR struct rptun_dev_s *dev;
struct remoteproc rproc;
struct rpmsg_virtio_device vdev;
struct rpmsg_virtio_shm_pool shm_pool;
struct metal_list bind;
struct metal_list node;
sem_t sem;
int tid;
unsigned long cmd;
};
struct rptun_bind_s
{
char name[RPMSG_NAME_SIZE];
uint32_t dest;
struct metal_list node;
};
struct rptun_cb_s
{
FAR void *priv;
rpmsg_dev_cb_t device_created;
rpmsg_dev_cb_t device_destroy;
rpmsg_bind_cb_t ns_bind;
struct metal_list node;
};
struct rptun_store_s
{
struct file file;
FAR char *buf;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static FAR struct remoteproc *rptun_init(FAR struct remoteproc *rproc,
FAR struct remoteproc_ops *ops,
FAR void *arg);
static void rptun_remove(FAR struct remoteproc *rproc);
static int rptun_config(struct remoteproc *rproc, void *data);
static int rptun_start(FAR struct remoteproc *rproc);
static int rptun_stop(FAR struct remoteproc *rproc);
static int rptun_notify(FAR struct remoteproc *rproc, uint32_t id);
static FAR struct remoteproc_mem *
rptun_get_mem(FAR struct remoteproc *rproc,
FAR const char *name,
metal_phys_addr_t pa,
metal_phys_addr_t da,
FAR void *va, size_t size,
FAR struct remoteproc_mem *buf);
static int rptun_can_recursive(FAR struct remoteproc *rproc);
static void rptun_ns_bind(FAR struct rpmsg_device *rdev,
FAR const char *name, uint32_t dest);
static int rptun_dev_start(FAR struct remoteproc *rproc);
static int rptun_dev_stop(FAR struct remoteproc *rproc);
static int rptun_dev_ioctl(FAR struct file *filep, int cmd,
unsigned long arg);
#ifdef CONFIG_RPTUN_LOADER
static int rptun_store_open(FAR void *store_, FAR const char *path,
FAR const void **img_data);
static void rptun_store_close(FAR void *store_);
static int rptun_store_load(FAR void *store_, size_t offset,
size_t size, FAR const void **data,
metal_phys_addr_t pa,
FAR struct metal_io_region *io,
char is_blocking);
#endif
static metal_phys_addr_t rptun_pa_to_da(FAR struct rptun_dev_s *dev,
metal_phys_addr_t pa);
static metal_phys_addr_t rptun_da_to_pa(FAR struct rptun_dev_s *dev,
metal_phys_addr_t da);
/****************************************************************************
* Private Data
****************************************************************************/
static struct remoteproc_ops g_rptun_ops =
{
.init = rptun_init,
.remove = rptun_remove,
.config = rptun_config,
.start = rptun_start,
.stop = rptun_stop,
.notify = rptun_notify,
.get_mem = rptun_get_mem,
.can_recursive = rptun_can_recursive,
};
static const struct file_operations g_rptun_devops =
{
NULL, /* open */
NULL, /* close */
NULL, /* read */
NULL, /* write */
NULL, /* seek */
rptun_dev_ioctl, /* ioctl */
NULL /* poll */
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
, NULL /* unlink */
#endif
};
#ifdef CONFIG_RPTUN_LOADER
static struct image_store_ops g_rptun_storeops =
{
.open = rptun_store_open,
.close = rptun_store_close,
.load = rptun_store_load,
.features = SUPPORT_SEEK,
};
#endif
static sem_t g_rptunlock = SEM_INITIALIZER(1);
static pid_t g_holder = NO_HOLDER;
static unsigned int g_count = 0;
static METAL_DECLARE_LIST(g_rptun_cb);
static METAL_DECLARE_LIST(g_rptun_priv);
/****************************************************************************
* Private Functions
****************************************************************************/
static int rptun_lock(void)
{
pid_t me = getpid();
int ret = OK;
/* Does this thread already hold the semaphore? */
if (g_holder == me)
{
/* Yes.. just increment the reference count */
g_count++;
}
else
{
/* No.. take the semaphore (perhaps waiting) */
ret = nxsem_wait_uninterruptible(&g_rptunlock);
if (ret >= 0)
{
/* Now this thread holds the semaphore */
g_holder = me;
g_count = 1;
}
}
return ret;
}
static void rptun_unlock(void)
{
DEBUGASSERT(g_holder == getpid() && g_count > 0);
/* If the count would go to zero, then release the semaphore */
if (g_count == 1)
{
/* We no longer hold the semaphore */
g_holder = NO_HOLDER;
g_count = 0;
nxsem_post(&g_rptunlock);
}
else
{
/* We still hold the semaphore. Just decrement the count */
g_count--;
}
}
static int rptun_thread(int argc, FAR char *argv[])
{
FAR struct rptun_priv_s *priv;
priv = (FAR struct rptun_priv_s *)((uintptr_t)strtoul(argv[2], NULL, 0));
priv->tid = gettid();
remoteproc_init(&priv->rproc, &g_rptun_ops, priv);
while (1)
{
nxsem_wait_uninterruptible(&priv->sem);
switch (priv->cmd)
{
case RPTUNIOC_START:
if (priv->rproc.state == RPROC_OFFLINE)
{
rptun_dev_start(&priv->rproc);
}
break;
case RPTUNIOC_STOP:
if (priv->rproc.state != RPROC_OFFLINE)
{
rptun_dev_stop(&priv->rproc);
}
break;
}
priv->cmd = RPTUNIOC_NONE;
remoteproc_get_notification(&priv->rproc, RPTUN_NOTIFY_ALL);
}
return 0;
}
static void rptun_wakeup(FAR struct rptun_priv_s *priv)
{
int semcount;
nxsem_get_value(&priv->sem, &semcount);
if (semcount < 1)
{
nxsem_post(&priv->sem);
}
}
static int rptun_callback(FAR void *arg, uint32_t vqid)
{
rptun_wakeup(arg);
return OK;
}
static FAR struct remoteproc *rptun_init(FAR struct remoteproc *rproc,
FAR struct remoteproc_ops *ops,
FAR void *arg)
{
rproc->ops = ops;
rproc->priv = arg;
return rproc;
}
static void rptun_remove(FAR struct remoteproc *rproc)
{
rproc->priv = NULL;
}
static int rptun_config(struct remoteproc *rproc, void *data)
{
struct rptun_priv_s *priv = rproc->priv;
if (RPTUN_IS_MASTER(priv->dev))
{
return RPTUN_CONFIG(priv->dev, data);
}
return 0;
}
static int rptun_start(FAR struct remoteproc *rproc)
{
FAR struct rptun_priv_s *priv = rproc->priv;
if (RPTUN_IS_MASTER(priv->dev))
{
return RPTUN_START(priv->dev);
}
return 0;
}
static int rptun_stop(FAR struct remoteproc *rproc)
{
FAR struct rptun_priv_s *priv = rproc->priv;
if (RPTUN_IS_MASTER(priv->dev))
{
return RPTUN_STOP(priv->dev);
}
return 0;
}
static int rptun_notify(FAR struct remoteproc *rproc, uint32_t id)
{
FAR struct rptun_priv_s *priv = rproc->priv;
RPTUN_NOTIFY(priv->dev, RPTUN_NOTIFY_ALL);
return 0;
}
static FAR struct remoteproc_mem *
rptun_get_mem(FAR struct remoteproc *rproc,
FAR const char *name,
metal_phys_addr_t pa,
metal_phys_addr_t da,
FAR void *va, size_t size,
FAR struct remoteproc_mem *buf)
{
FAR struct rptun_priv_s *priv = rproc->priv;
metal_list_init(&buf->node);
strcpy(buf->name, name ? name : "");
buf->io = metal_io_get_region();
buf->size = size;
if (pa != METAL_BAD_PHYS)
{
buf->pa = pa;
buf->da = rptun_pa_to_da(priv->dev, pa);
}
else if (da != METAL_BAD_PHYS)
{
buf->pa = rptun_da_to_pa(priv->dev, da);
buf->da = da;
}
else
{
buf->pa = metal_io_virt_to_phys(buf->io, va);
buf->da = rptun_pa_to_da(priv->dev, buf->pa);
}
if (buf->pa == METAL_BAD_PHYS || buf->da == METAL_BAD_PHYS)
{
return NULL;
}
return buf;
}
static int rptun_can_recursive(FAR struct remoteproc *rproc)
{
FAR struct rptun_priv_s *priv = rproc->priv;
return gettid() == priv->tid;
}
static void *rptun_get_priv_by_rdev(FAR struct rpmsg_device *rdev)
{
struct rpmsg_virtio_device *rvdev;
struct virtio_device *vdev;
struct remoteproc_virtio *rpvdev;
struct remoteproc *rproc;
rvdev = metal_container_of(rdev, struct rpmsg_virtio_device, rdev);
vdev = rvdev->vdev;
if (!vdev)
{
return NULL;
}
rpvdev = metal_container_of(vdev, struct remoteproc_virtio, vdev);
rproc = rpvdev->priv;
if (!rproc)
{
return NULL;
}
return rproc->priv;
}
static void rptun_ns_bind(FAR struct rpmsg_device *rdev,
FAR const char *name, uint32_t dest)
{
FAR struct rptun_priv_s *priv = rptun_get_priv_by_rdev(rdev);
FAR struct rptun_bind_s *bind;
bind = kmm_malloc(sizeof(struct rptun_bind_s));
if (bind)
{
FAR struct metal_list *node;
FAR struct rptun_cb_s *cb;
bind->dest = dest;
strncpy(bind->name, name, RPMSG_NAME_SIZE);
rptun_lock();
metal_list_add_tail(&priv->bind, &bind->node);
metal_list_for_each(&g_rptun_cb, node)
{
cb = metal_container_of(node, struct rptun_cb_s, node);
if (cb->ns_bind)
{
cb->ns_bind(rdev, cb->priv, name, dest);
}
}
rptun_unlock();
}
}
static void rptun_ns_unbind(FAR struct rpmsg_device *rdev,
FAR const char *name, uint32_t dest)
{
FAR struct rptun_priv_s *priv = rptun_get_priv_by_rdev(rdev);
FAR struct metal_list *node;
rptun_lock();
metal_list_for_each(&priv->bind, node)
{
struct rptun_bind_s *bind;
bind = metal_container_of(node, struct rptun_bind_s, node);
if (bind->dest == dest && !strncmp(bind->name, name, RPMSG_NAME_SIZE))
{
metal_list_del(node);
kmm_free(bind);
break;
}
}
rptun_unlock();
}
static int rptun_dev_start(FAR struct remoteproc *rproc)
{
FAR struct rptun_priv_s *priv = rproc->priv;
FAR struct virtio_device *vdev;
FAR struct rptun_rsc_s *rsc;
FAR struct metal_list *node;
FAR struct rptun_cb_s *cb;
unsigned int role = RPMSG_REMOTE;
int ret;
ret = remoteproc_config(&priv->rproc, NULL);
if (ret)
{
return ret;
}
#ifdef CONFIG_RPTUN_LOADER
if (RPTUN_GET_FIRMWARE(priv->dev))
{
struct rptun_store_s store =
{
0
};
ret = remoteproc_load(rproc, RPTUN_GET_FIRMWARE(priv->dev),
&store, &g_rptun_storeops, NULL);
if (ret)
{
return ret;
}
rsc = rproc->rsc_table;
}
else
#endif
{
rsc = RPTUN_GET_RESOURCE(priv->dev);
if (!rsc)
{
return -EINVAL;
}
ret = remoteproc_set_rsc_table(rproc, (struct resource_table *)rsc,
sizeof(struct rptun_rsc_s));
if (ret)
{
return ret;
}
}
/* Update resource table on MASTER side */
if (RPTUN_IS_MASTER(priv->dev))
{
uint32_t tbsz;
uint32_t v0sz;
uint32_t v1sz;
uint32_t shbufsz;
metal_phys_addr_t da0;
metal_phys_addr_t da1;
uint32_t align0;
uint32_t align1;
FAR void *va0;
FAR void *va1;
FAR void *shbuf;
FAR struct metal_io_region *io;
metal_phys_addr_t pa0;
metal_phys_addr_t pa1;
align0 = rsc->rpmsg_vring0.align;
align1 = rsc->rpmsg_vring1.align;
tbsz = ALIGN_UP(sizeof(struct rptun_rsc_s), MAX(align0, align1));
v0sz = ALIGN_UP(vring_size(rsc->rpmsg_vring0.num, align0), align0);
v1sz = ALIGN_UP(vring_size(rsc->rpmsg_vring1.num, align1), align1);
va0 = (FAR char *)rsc + tbsz;
va1 = (FAR char *)rsc + tbsz + v0sz;
io = metal_io_get_region();
pa0 = metal_io_virt_to_phys(io, va0);
pa1 = metal_io_virt_to_phys(io, va1);
da0 = da1 = METAL_BAD_PHYS;
remoteproc_mmap(rproc, &pa0, &da0, v0sz, 0, NULL);
remoteproc_mmap(rproc, &pa1, &da1, v1sz, 0, NULL);
rsc->rpmsg_vring0.da = da0;
rsc->rpmsg_vring1.da = da1;
shbuf = (FAR char *)rsc + tbsz + v0sz + v1sz;
shbufsz = rsc->config.txbuf_size * rsc->rpmsg_vring0.num +
rsc->config.rxbuf_size * rsc->rpmsg_vring1.num;
rpmsg_virtio_init_shm_pool(&priv->shm_pool, shbuf, shbufsz);
role = RPMSG_MASTER;
}
/* Remote proc create */
vdev = remoteproc_create_virtio(rproc, 0, role, NULL);
if (!vdev)
{
return -ENOMEM;
}
ret = rpmsg_init_vdev(&priv->vdev, vdev, rptun_ns_bind,
metal_io_get_region(), &priv->shm_pool);
if (ret)
{
remoteproc_remove_virtio(rproc, vdev);
return ret;
}
priv->vdev.rdev.ns_unbind_cb = rptun_ns_unbind;
/* Remote proc start */
ret = remoteproc_start(rproc);
if (ret)
{
remoteproc_remove_virtio(rproc, vdev);
return ret;
}
rptun_lock();
/* Add priv to list */
metal_list_add_tail(&g_rptun_priv, &priv->node);
/* Broadcast device_created to all registers */
metal_list_for_each(&g_rptun_cb, node)
{
cb = metal_container_of(node, struct rptun_cb_s, node);
if (cb->device_created)
{
cb->device_created(&priv->vdev.rdev, cb->priv);
}
}
rptun_unlock();
/* Register callback to mbox for receiving remote message */
RPTUN_REGISTER_CALLBACK(priv->dev, rptun_callback, priv);
return 0;
}
static int rptun_dev_stop(FAR struct remoteproc *rproc)
{
FAR struct rptun_priv_s *priv = rproc->priv;
FAR struct metal_list *node;
FAR struct rptun_cb_s *cb;
/* Unregister callback from mbox */
RPTUN_UNREGISTER_CALLBACK(priv->dev);
rptun_lock();
/* Remove priv from list */
metal_list_del(&priv->node);
/* Broadcast device_destroy to all registers */
metal_list_for_each(&g_rptun_cb, node)
{
cb = metal_container_of(node, struct rptun_cb_s, node);
if (cb->device_destroy)
{
cb->device_destroy(&priv->vdev.rdev, cb->priv);
}
}
rptun_unlock();
/* Remote proc stop and shutdown */
remoteproc_shutdown(rproc);
/* Remote proc remove */
remoteproc_remove_virtio(rproc, priv->vdev.vdev);
rpmsg_deinit_vdev(&priv->vdev);
return 0;
}
static int rptun_dev_ioctl(FAR struct file *filep, int cmd,
unsigned long arg)
{
FAR struct inode *inode = filep->f_inode;
FAR struct rptun_priv_s *priv = inode->i_private;
int ret = OK;
switch (cmd)
{
case RPTUNIOC_START:
case RPTUNIOC_STOP:
priv->cmd = cmd;
rptun_wakeup(priv);
break;
default:
ret = -ENOTTY;
break;
}
return ret;
}
#ifdef CONFIG_RPTUN_LOADER
static int rptun_store_open(FAR void *store_,
FAR const char *path,
FAR const void **img_data)
{
FAR struct rptun_store_s *store = store_;
int len = 0x100;
int ret;
ret = file_open(&store->file, path, O_RDONLY);
if (ret < 0)
{
return ret;
}
store->buf = kmm_malloc(len);
if (!store->buf)
{
file_close(&store->file);
return -ENOMEM;
}
*img_data = store->buf;
return file_read(&store->file, store->buf, len);
}
static void rptun_store_close(FAR void *store_)
{
FAR struct rptun_store_s *store = store_;
kmm_free(store->buf);
file_close(&store->file);
}
static int rptun_store_load(FAR void *store_, size_t offset,
size_t size, FAR const void **data,
metal_phys_addr_t pa,
FAR struct metal_io_region *io,
char is_blocking)
{
FAR struct rptun_store_s *store = store_;
FAR char *tmp;
if (pa == METAL_BAD_PHYS)
{
tmp = kmm_realloc(store->buf, size);
if (!tmp)
{
return -ENOMEM;
}
store->buf = tmp;
*data = tmp;
}
else
{
tmp = metal_io_phys_to_virt(io, pa);
if (!tmp)
{
return -EINVAL;
}
}
file_seek(&store->file, offset, SEEK_SET);
return file_read(&store->file, tmp, size);
}
#endif
static metal_phys_addr_t rptun_pa_to_da(FAR struct rptun_dev_s *dev,
metal_phys_addr_t pa)
{
FAR const struct rptun_addrenv_s *addrenv;
uint32_t i;
addrenv = RPTUN_GET_ADDRENV(dev);
if (!addrenv)
{
return pa;
}
for (i = 0; addrenv[i].size; i++)
{
if (pa - addrenv[i].pa < addrenv[i].size)
{
return addrenv[i].da + (pa - addrenv[i].pa);
}
}
return pa;
}
static metal_phys_addr_t rptun_da_to_pa(FAR struct rptun_dev_s *dev,
metal_phys_addr_t da)
{
FAR const struct rptun_addrenv_s *addrenv;
uint32_t i;
addrenv = RPTUN_GET_ADDRENV(dev);
if (!addrenv)
{
return da;
}
for (i = 0; addrenv[i].size; i++)
{
if (da - addrenv[i].da < addrenv[i].size)
{
return addrenv[i].pa + (da - addrenv[i].da);
}
}
return da;
}
/****************************************************************************
* Public Functions
****************************************************************************/
FAR const char *rpmsg_get_cpuname(FAR struct rpmsg_device *rdev)
{
FAR struct rptun_priv_s *priv = rptun_get_priv_by_rdev(rdev);
return RPTUN_GET_CPUNAME(priv->dev);
}
int rpmsg_register_callback(FAR void *priv_,
rpmsg_dev_cb_t device_created,
rpmsg_dev_cb_t device_destroy,
rpmsg_bind_cb_t ns_bind)
{
FAR struct metal_list *node;
FAR struct metal_list *bnode;
FAR struct rptun_cb_s *cb;
cb = kmm_zalloc(sizeof(struct rptun_cb_s));
if (!cb)
{
return -ENOMEM;
}
cb->priv = priv_;
cb->device_created = device_created;
cb->device_destroy = device_destroy;
cb->ns_bind = ns_bind;
rptun_lock();
metal_list_add_tail(&g_rptun_cb, &cb->node);
metal_list_for_each(&g_rptun_priv, node)
{
struct rptun_priv_s *priv;
priv = metal_container_of(node, struct rptun_priv_s, node);
if (device_created)
{
device_created(&priv->vdev.rdev, priv_);
}
if (ns_bind)
{
metal_list_for_each(&priv->bind, bnode)
{
struct rptun_bind_s *bind;
bind = metal_container_of(bnode, struct rptun_bind_s, node);
ns_bind(&priv->vdev.rdev, priv_, bind->name, bind->dest);
}
}
}
rptun_unlock();
return 0;
}
void rpmsg_unregister_callback(FAR void *priv_,
rpmsg_dev_cb_t device_created,
rpmsg_dev_cb_t device_destroy,
rpmsg_bind_cb_t ns_bind)
{
FAR struct metal_list *node;
FAR struct metal_list *pnode;
rptun_lock();
metal_list_for_each(&g_rptun_cb, node)
{
struct rptun_cb_s *cb = NULL;
cb = metal_container_of(node, struct rptun_cb_s, node);
if (cb->priv == priv_ &&
cb->device_created == device_created &&
cb->device_destroy == device_destroy &&
cb->ns_bind == ns_bind)
{
if (device_destroy)
{
metal_list_for_each(&g_rptun_priv, pnode)
{
struct rptun_priv_s *priv;
priv = metal_container_of(pnode,
struct rptun_priv_s, node);
device_destroy(&priv->vdev.rdev, priv_);
}
}
metal_list_del(&cb->node);
kmm_free(cb);
break;
}
}
rptun_unlock();
}
int rptun_initialize(FAR struct rptun_dev_s *dev)
{
struct metal_init_params params = METAL_INIT_DEFAULTS;
FAR struct rptun_priv_s *priv;
FAR char *argv[3];
char arg1[16];
char name[32];
int ret;
ret = metal_init(&params);
if (ret < 0)
{
return ret;
}
priv = kmm_zalloc(sizeof(struct rptun_priv_s));
if (priv == NULL)
{
ret = -ENOMEM;
goto err_mem;
}
priv->dev = dev;
if (RPTUN_IS_AUTOSTART(dev))
{
priv->cmd = RPTUNIOC_START;
}
metal_list_init(&priv->bind);
nxsem_init(&priv->sem, 0, RPTUN_IS_AUTOSTART(dev) ? 1 : 0);
nxsem_set_protocol(&priv->sem, SEM_PRIO_NONE);
snprintf(name, 32, "/dev/rptun/%s", RPTUN_GET_CPUNAME(dev));
ret = register_driver(name, &g_rptun_devops, 0222, priv);
if (ret < 0)
{
goto err_driver;
}
snprintf(arg1, 16, "0x%" PRIxPTR, (uintptr_t)priv);
argv[0] = (void *)RPTUN_GET_CPUNAME(dev);
argv[1] = arg1;
argv[2] = NULL;
ret = kthread_create("rptun",
CONFIG_RPTUN_PRIORITY,
CONFIG_RPTUN_STACKSIZE,
rptun_thread,
argv);
if (ret < 0)
{
goto err_thread;
}
return OK;
err_thread:
unregister_driver(name);
err_driver:
nxsem_destroy(&priv->sem);
kmm_free(priv);
err_mem:
metal_finish();
return ret;
}
int rptun_boot(FAR const char *cpuname)
{
struct file file;
char name[32];
int ret;
if (!cpuname)
{
return -EINVAL;
}
snprintf(name, 32, "/dev/rptun/%s", cpuname);
ret = file_open(&file, name, 0, 0);
if (ret)
{
return ret;
}
ret = file_ioctl(&file, RPTUNIOC_START, 0);
file_close(&file);
return ret;
}
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