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wireless/ieee802154: WIP for MAC char driver write functionality

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This commit is contained in:
Anthony Merlino 2017-04-05 15:07:58 -04:00
parent aada26f903
commit 2ecca492ad
1 changed files with 77 additions and 5 deletions
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78
wireless/ieee802154/mac802154_device.c
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@ -74,6 +74,8 @@ struct mac802154_devwrapper_s
*/
FAR struct mac802154_open_s *md_open;
FAR struct mac802154dev_dwait_s *md_dwait;
};
/* This structure describes the state of one open mac driver instance */
@ -89,6 +91,17 @@ struct mac802154_open_s
volatile bool md_closing;
};
struct mac802154dev_dwait_s
{
uint8_t mw_handle; /* The msdu handle identifying the frame */
sem_t mw_sem; /* The semaphore used to signal the completion */
int status; /* The success/error of the transaction */
/* Supports a singly linked list */
FAR struct mac802154dev_dwait_s *mw_flink;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
@ -362,7 +375,8 @@ static ssize_t mac802154dev_write(FAR struct file *filep,
{
FAR struct inode *inode;
FAR struct mac802154_devwrapper_s *dev;
struct ieee802154_frame_s frame;
FAR struct ieee802154_data_req_s *req;
struct mac802154dev_dwait_s dwait;
int ret;
DEBUGASSERT(filep && filep->f_inode);
@ -392,13 +406,38 @@ static ssize_t mac802154dev_write(FAR struct file *filep,
return ret;
}
/* TODO: Send the frame out */
ret = -ENOTSUP;
/* Setup the wait struct */
dwait.mw_handle = req->msdu_handle;
/* Link the wait struct */
dwait.mw_flink = dev->md_dwait;
dev->md_wait = &dwait;
/* Pass the request to the MAC layer */
ret = dev->md_mac->ops.req_data(dev->md_mac, req);
mac802154dev_givesem(&dev->md_exclsem);
if (ret < 0)
{
wlerr("ERROR: req_data failed %d\n", ret);
return ret;
}
/* Wait for the DATA.confirm callback to be called for our handle */
sem_wait(dwait.mw_sem);
/* The unlinking of the wait struct happens inside the callback. This
* is more efficient since it will already have to find the struct in
* the list in order to perform the sem_post. */
return dwait.status;
}
/****************************************************************************
* Name: mac802154dev_ioctl
*
@ -444,6 +483,39 @@ static int mac802154dev_ioctl(FAR struct file *filep, int cmd,
return ret;
}
void mac802154dev_conf_data(FAR struct ieee802154_mac_s *mac,
FAR struct ieee802154_data_conf_s *conf)
{
FAR struct mac802154_devwrapper_s *dev;
FAR struct mac802154dev_dwait_s *curr;
FAR struct mac802154dev_dwait_s *prev;
int ret;
/* Get the dev from the callback context. This should have been set when the
* char driver was registered */
dev = mac->cbs.cb_context;
/* Get exclusive access to the driver structure */
ret = mac802154dev_takesem(&dev->md_exclsem);
if (ret < 0)
{
wlerr("ERROR: mac802154dev_takesem failed: %d\n", ret);
return ret;
}
/* Search to see if there is a dwait pending for this transaction */
for (prev = NULL, curr = dev->md_dwait;
curr && curr->mw_handle != conf->msdu_handle;
prev = curr, curr = curr->mw_flink);
}
/****************************************************************************
* Public Functions
****************************************************************************/