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MAC API tentative extension, small improvement to STM32 MAC driver. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@4983 35acf78f-673a-0410-8e92-d51de3d6d3f4
master
gdisirio 2012-12-28 15:15:09 +00:00
parent 17d265e3ba
commit 22dcca914b
2 changed files with 51 additions and 7 deletions
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53
os/hal/include/mac.h
View File

@ -121,17 +121,58 @@ typedef struct MACDriver MACDriver;
/**
* @brief Reads from a receive descriptor's stream.
*
* @param[in] rdp pointer to a @p MACReceiveDescriptor structure
* @param[in] buf pointer to the buffer that will receive the read data
* @param[in] size number of bytes to be read
* @return The number of bytes read from the descriptor's stream, this
* value can be less than the amount specified in the
* parameter @p size if there are no more bytes to read.
* @param[in] rdp pointer to a @p MACReceiveDescriptor structure
* @param[in] buf pointer to the buffer that will receive the read data
* @param[in] size number of bytes to be read
* @return The number of bytes read from the descriptor's stream,
* this value can be less than the amount specified in the
* parameter @p size if there are no more bytes to read.
*
* @api
*/
#define macReadReceiveDescriptor(rdp, buf, size) \
mac_lld_read_receive_descriptor(rdp, buf, size)
#if MAC_SUPPORTS_ZERO_COPY || defined(__DOXYGEN__)
/**
* @brief Returns a pointer to the next transmit buffer in the descriptor
* chain.
* @note The API guarantees that enough buffers can be requested to fill
* a whole frame.
*
* @param[in] tdp pointer to a @p MACTransmitDescriptor structure
* @param[in] size size of the requested buffer. Specify the frame size
* on the first call then scale the value down subtracting
* the amount of data already copied into the previous
* buffers.
* @param[out] sizep pointer to variable receiving the real buffer size.
* The returned value can be less than the amount
* requested, this means that more buffers must be
* requested in order to fill the frame data entirely.
* @return Pointer to the returned buffer.
*
* @api
*/
#define macGetNextTransmitBuffer(tdp, size, sizep) \
mac_lld_get_next_transmit_buffer(tdp, bufp)
/**
* @brief Returns a pointer to the next receive buffer in the descriptor
* chain.
* @note The API guarantees that the descriptor chain contains a whole
* frame.
*
* @param[in] rdp pointer to a @p MACReceiveDescriptor structure
* @param[out] sizep pointer to variable receiving the buffer size, it is
* zero when the last buffer has already been returned.
* @return Pointer to the returned buffer.
* @retval NULL if the buffer chain has been entirely scanned.
*
* @api
*/
#define magGetNextReceiveBuffer(rdp, sizep) \
mac_lld_get_next_receive_buffer(rdp, sizep)
#endif /* MAC_SUPPORTS_ZERO_COPY */
/** @} */
/*===========================================================================*/

5
os/hal/platforms/STM32/mac_lld.c
View File

@ -536,9 +536,12 @@ msg_t mac_lld_get_receive_descriptor(MACDriver *macp,
}
/* Invalid frame found, purging.*/
rdes->rdes0 = STM32_RDES0_OWN;
rdes = macp->rxptr = (stm32_eth_rx_descriptor_t *)rdes->rdes3;
rdes = (stm32_eth_rx_descriptor_t *)rdes->rdes3;
}
/* Next descriptor to check.*/
macp->rxptr = rdes;
chSysUnlock();
return RDY_TIMEOUT;
}