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Update MAC drivers so they use a uIP specific zero copy mechanism.

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pull/4/head
Richard Barry 14 years ago
parent 5fbf3ab27e
commit c1d000b654
3 changed files with 138 additions and 179 deletions
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269
Demo/CORTEX_A2F200_IAR_and_Keil/MicroSemi_Code/drivers/mss_ethernet_mac/mss_ethernet_mac.c
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@ -9,9 +9,14 @@
*
******************************************************************************/
/*
* NOTE: This driver has been roughly modified specifically for use with the
* uIP stack. It is no longer a generic driver.
*/
#ifdef __cplusplus
extern "C" {
#endif
#endif
#include "FreeRTOS.h"
#include "task.h"
@ -54,11 +59,11 @@ extern "C" {
/* Allocating this many buffers will always ensure there is one free as, even
though TX_RING_SIZE is set to two, the two Tx descriptors will only ever point
to the same buffer. */
#define macNUM_BUFFERS RX_RING_SIZE + TX_RING_SIZE + 1
#define macNUM_BUFFERS RX_RING_SIZE + TX_RING_SIZE + 2
#define macBUFFER_SIZE 1488
/***************************************************************/
MAC_instance_t g_mss_mac __attribute__((aligned(4)));
MAC_instance_t g_mss_mac;
/**************************** INTERNAL DATA ***********************************/
#define ERROR_MESSAGE_COUNT 8
@ -78,15 +83,16 @@ static const int8_t ErrorMessages[][MAX_ERROR_MESSAGE_WIDTH] = {
/*
* Null variables
*/
static MAC_instance_t* NULL_instance;
static uint8_t* NULL_buffer;
static MSS_MAC_callback_t NULL_callback;
/* Declare the uip_buf as a pointer, rather than the traditional array, as this
is a zero copy driver. uip_buf just gets set to whichever buffer is being
processed. */
unsigned char *uip_buf = NULL;
/**************************** INTERNAL FUNCTIONS ******************************/
static int32_t MAC_test_instance( void );
static int32_t MAC_dismiss_bad_frames( void );
static int32_t MAC_send_setup_frame( void );
@ -109,11 +115,16 @@ static void MAC_release_buffer( unsigned char *pcBufferToRelease );
#error This uIP Ethernet driver required TX_RING_SIZE to be set to 2
#endif
/* Buffers that will dynamically be allocated to/from the Tx and Rx descriptors. */
static unsigned char ucMACBuffers[ macNUM_BUFFERS ][ macBUFFER_SIZE ] __attribute__((aligned(4)));
/* Buffers that will dynamically be allocated to/from the Tx and Rx descriptors.
The union is used for alignment only. */
static union xMAC_BUFFERS
{
unsigned long ulAlignmentVariable; /* For alignment only, not used anywhere. */
unsigned char ucBuffer[ macNUM_BUFFERS ][ macBUFFER_SIZE ];
} xMACBuffers;
/* Each array position indicated whether or not the buffer of the same index
is currently allocated to a descriptor (pdFALSE) or is free for use (pdTRUE). */
/* Each array position indicates whether or not the buffer of the same index
is currently allocated to a descriptor (pdTRUE) or is free for use (pdFALSE). */
static unsigned char ucMACBufferInUse[ macNUM_BUFFERS ] = { 0 };
/***************************************************************************//**
@ -169,7 +180,7 @@ MSS_MAC_init
/* Allocate a buffer to the descriptor, then mark the buffer as in use
(not free). */
g_mss_mac.rx_descriptors[a].buffer_1 = ( unsigned long ) &( ucMACBuffers[ a ][ 0 ] );
g_mss_mac.rx_descriptors[a].buffer_1 = ( unsigned long ) &( xMACBuffers.ucBuffer[ a ][ 0 ] );
ucMACBufferInUse[ a ] = pdTRUE;
}
g_mss_mac.rx_descriptors[RX_RING_SIZE-1].descriptor_1 |= RDES1_RER;
@ -189,8 +200,6 @@ MSS_MAC_init
MAC_BITBAND->CSR0_BAR = (uint32_t)BUS_ARBITRATION_SCHEME;
/* Fixed settings */
/* No automatic polling */
MAC->CSR0 = MAC->CSR0 &~ CSR0_TAP_MASK;
/* No space between descriptors */
MAC->CSR0 = MAC->CSR0 &~ CSR0_DSL_MASK;
/* General-purpose timer works in continuous mode */
@ -198,19 +207,25 @@ MSS_MAC_init
/* Start general-purpose */
MAC->CSR11 = (MAC->CSR11 & ~CSR11_TIM_MASK) | (0x0000FFFFuL << CSR11_TIM_SHIFT);
/* Disable promiscuous mode */
MAC_BITBAND->CSR6_PR = 0u;
/* Enable store and forward */
MAC_BITBAND->CSR6_SF = 1u;
/* Disable transmit interrupt mitigation. */
MAC->CSR11 = ( MAC->CSR11 & ~CSR11_TT_MASK );
MAC->CSR11 = ( MAC->CSR11 & ~CSR11_NTP_MASK );
/* Automatic Tx descriptor polling. */
MAC->CSR0 = ( MAC->CSR0 & ~CSR0_TAP_MASK );
MAC->CSR0 = ( MAC->CSR0 | ( 0x01 << CSR0_TAP_SHIFT ) );
/* Set descriptors */
MAC->CSR3 = (uint32_t)&(g_mss_mac.rx_descriptors[0].descriptor_0);
MAC->CSR4 = (uint32_t)&(g_mss_mac.tx_descriptors[0].descriptor_0);
/* enable normal interrupts */
MAC_BITBAND->CSR7_NIE = 1u;
/* Set default MAC address and reset mac filters */
MAC_memcpy( g_mss_mac.mac_address, mac_address, 6u );
MSS_MAC_set_mac_address((uint8_t *)mac_address);
/* Detect PHY */
if( g_mss_mac.phy_address > MSS_PHY_ADDRESS_MAX )
{
@ -221,21 +236,11 @@ MSS_MAC_init
/* Reset PHY */
PHY_reset();
/* Set flags */
g_mss_mac.flags = FLAG_MAC_INIT_DONE | FLAG_PERFECT_FILTERING;
/* Configure chip according to PHY status */
MSS_MAC_auto_setup_link();
/* Set default MAC address and reset mac filters */
MAC_memcpy( g_mss_mac.mac_address, mac_address, 6u );
MSS_MAC_set_mac_filters( 0u, NULL_buffer );
MAC_BITBAND->CSR6_RA = 1; /* Receive all. */
MAC_BITBAND->CSR6_PR = 1; /* Promiscuous mode. */
MSS_MAC_set_mac_address((uint8_t *)mac_address);
/* Ensure uip_buf starts by pointing somewhere. */
uip_buf = MAC_obtain_buffer();
uip_buf = MAC_obtain_buffer();
}
@ -264,8 +269,6 @@ MSS_MAC_configure
{
int32_t ret;
configASSERT( MAC_test_instance() == MAC_OK );
ret = MAC_stop_transmission();
configASSERT( ret == MAC_OK );
@ -275,7 +278,7 @@ MSS_MAC_configure
MAC_BITBAND->CSR6_RA = (uint32_t)(((configuration & MSS_MAC_CFG_RECEIVE_ALL) != 0u) ? 1u : 0u );
MAC_BITBAND->CSR6_TTM = (((configuration & MSS_MAC_CFG_TRANSMIT_THRESHOLD_MODE) != 0u) ? 1u : 0u );
MAC_BITBAND->CSR6_SF = (uint32_t)(((configuration & MSS_MAC_CFG_STORE_AND_FORWARD) != 0u) ? 1u : 0u );
switch( configuration & MSS_MAC_CFG_THRESHOLD_CONTROL_11 ) {
case MSS_MAC_CFG_THRESHOLD_CONTROL_00:
MAC->CSR6 = MAC->CSR6 & ~CSR6_TR_MASK;
@ -327,8 +330,6 @@ MSS_MAC_get_configuration( void )
{
uint32_t configuration;
configASSERT( MAC_test_instance() == MAC_OK );
configuration = 0u;
if( MAC_BITBAND->CSR6_RA != 0u ) {
configuration |= MSS_MAC_CFG_RECEIVE_ALL;
@ -375,7 +376,7 @@ MSS_MAC_get_configuration( void )
if( MAC_BITBAND->CSR6_HP != 0u ) {
configuration |= MSS_MAC_CFG_HASH_PERFECT_RECEIVE_FILTERING_MODE;
}
return (int32_t)configuration;
}
@ -387,11 +388,11 @@ MSS_MAC_get_configuration( void )
the transmit FIFO and then activates the transmitter for this packet. If space
is available in the FIFO, the function will return once pac_len bytes of the
packet have been placed into the FIFO and the transmitter has been started.
This function will not wait for the transmission to complete.
This function will not wait for the transmission to complete.
@return
The function returns zero if a timeout occurs otherwise it returns size of the packet.
@see MAC_rx_packet()
*/
@ -404,9 +405,6 @@ MSS_MAC_tx_packet
uint32_t desc;
unsigned long ulDescriptor;
int32_t error = MAC_OK;
extern unsigned char *uip_buf;
configASSERT( MAC_test_instance() == MAC_OK );
configASSERT( uip_buf != NULL_buffer );
@ -419,28 +417,34 @@ MSS_MAC_tx_packet
/* Check if second descriptor is free, if it is then the first must
also be free. */
if(((g_mss_mac.tx_descriptors[ 1 ].descriptor_0) & TDES0_OWN) == TDES0_OWN )
if( ( ( (g_mss_mac.tx_descriptors[ 0 ].descriptor_0) & TDES0_OWN) == TDES0_OWN ) || ( ( (g_mss_mac.tx_descriptors[ 1 ].descriptor_0) & TDES0_OWN) == TDES0_OWN ) )
{
error = MAC_BUFFER_IS_FULL;
/* Check the buffers pointed to by the Tx descriptors, just in case a Tx
interrupt has been missed and a free buffer remains marked as in use. */
MSS_MAC_CheckTxBufferStatus();
}
if( error == MAC_OK )
{
/* Assumed TX_RING_SIZE == 2. */
/* Assumed TX_RING_SIZE == 2. A #error directive checks this is the
case. */
for( ulDescriptor = 0; ulDescriptor < TX_RING_SIZE; ulDescriptor++ )
{
g_mss_mac.tx_descriptors[ ulDescriptor ].descriptor_1 = 0u;
g_mss_mac.tx_descriptors[ g_mss_mac.tx_desc_index ].descriptor_1 = 0u;
if( (g_mss_mac.flags & FLAG_CRC_DISABLE) != 0u ) {
g_mss_mac.tx_descriptors[ ulDescriptor ].descriptor_1 |= TDES1_AC;
g_mss_mac.tx_descriptors[ g_mss_mac.tx_desc_index ].descriptor_1 |= TDES1_AC;
}
/* Every buffer can hold a full frame so they are always first and last
descriptor */
g_mss_mac.tx_descriptors[ ulDescriptor ].descriptor_1 |= TDES1_LS | TDES1_FS | TDES1_IC;
g_mss_mac.tx_descriptors[ g_mss_mac.tx_desc_index ].descriptor_1 |= TDES1_LS | TDES1_FS | TDES1_IC;
/* set data size */
g_mss_mac.tx_descriptors[ ulDescriptor ].descriptor_1 |= usLength;
g_mss_mac.tx_descriptors[ g_mss_mac.tx_desc_index ].descriptor_1 |= usLength;
/* reset end of ring */
g_mss_mac.tx_descriptors[TX_RING_SIZE-1].descriptor_1 |= TDES1_TER;
@ -451,10 +455,10 @@ MSS_MAC_tx_packet
}
/* The data buffer is assigned to the Tx descriptor. */
g_mss_mac.tx_descriptors[ ulDescriptor ].buffer_1 = ( unsigned long ) uip_buf;
g_mss_mac.tx_descriptors[ g_mss_mac.tx_desc_index ].buffer_1 = ( unsigned long ) uip_buf;
/* update counters */
desc = g_mss_mac.tx_descriptors[ ulDescriptor ].descriptor_0;
desc = g_mss_mac.tx_descriptors[ g_mss_mac.tx_desc_index ].descriptor_0;
if( (desc & TDES0_LO) != 0u ) {
g_mss_mac.statistics.tx_loss_of_carrier++;
}
@ -474,25 +478,22 @@ MSS_MAC_tx_packet
(desc >> TDES0_CC_OFFSET) & TDES0_CC_MASK;
/* Give ownership of descriptor to the MAC */
g_mss_mac.tx_descriptors[ ulDescriptor ].descriptor_0 = RDES0_OWN;
}
/* Start transmission */
MAC_start_transmission();
g_mss_mac.tx_desc_index = 0;
/* transmit poll demand */
MAC->CSR1 = 1u;
g_mss_mac.tx_descriptors[ g_mss_mac.tx_desc_index ].descriptor_0 = RDES0_OWN;
g_mss_mac.tx_desc_index = (g_mss_mac.tx_desc_index + 1u) % (uint32_t)TX_RING_SIZE;
MAC_start_transmission();
MAC->CSR1 = 1u;
}
}
if (error == MAC_OK)
{
/* The buffer uip_buf was pointing to is now under the control of the
MAC (it is being transmitted). Set uip_buf to point to a free buffer. */
uip_buf = MAC_obtain_buffer();
error = (int32_t)usLength;
/* The buffer pointed to by uip_buf is now assigned to a Tx descriptor.
Find anothere free buffer for uip_buf. */
uip_buf = MAC_obtain_buffer();
}
else
{
@ -517,8 +518,6 @@ MSS_MAC_rx_pckt_size
)
{
int32_t retval;
configASSERT( MAC_test_instance() == MAC_OK );
MAC_dismiss_bad_frames();
if( (g_mss_mac.rx_descriptors[ g_mss_mac.rx_desc_index ].descriptor_0 & RDES0_OWN) != 0u )
@ -540,7 +539,7 @@ MSS_MAC_rx_pckt_size
* Receives a packet from the Ethernet Controller into the uIP stack.
* This function reads a packet from the receive FIFO of the controller and
* places it into uip_buf.
* @return Size of packet if packet fits in uip_buf.
* 0 if there is no received packet.
* @see MAC_rx_pckt_size()
@ -554,8 +553,6 @@ MSS_MAC_rx_packet
{
uint16_t frame_length=0u;
configASSERT( MAC_test_instance() == MAC_OK );
MAC_dismiss_bad_frames();
if( (g_mss_mac.rx_descriptors[ g_mss_mac.rx_desc_index ].descriptor_0 & RDES0_OWN) == 0u )
@ -570,7 +567,7 @@ MSS_MAC_rx_packet
if( frame_length > macBUFFER_SIZE ) {
return MAC_NOT_ENOUGH_SPACE;
}
/* uip_buf is about to point to the buffer that contains the received
data, mark the buffer that uip_buf is currently pointing to as free
again. */
@ -590,7 +587,7 @@ MSS_MAC_rx_packet
/***************************************************************************//**
* Receives a packet from the Ethernet Controller.
* This function reads a packet from the receive FIFO of the controller and
* sets the address of pacData to the received data.
* sets the address of pacData to the received data.
* If time_out parameter is zero the function will return
* immediately (after the copy operation if data is available. Otherwise the function
* will keep trying to read till time_out expires or data is read, if MSS_MAC_BLOCKING
@ -619,8 +616,6 @@ MSS_MAC_rx_packet_ptrset
uint16_t frame_length = 0u;
int8_t exit = 0;
configASSERT( MAC_test_instance() == MAC_OK );
configASSERT( (time_out == MSS_MAC_BLOCKING) ||
(time_out == MSS_MAC_NONBLOCKING) ||
((time_out >= 1) && (time_out <= 0x01000000UL)) );
@ -658,11 +653,11 @@ MSS_MAC_rx_packet_ptrset
/* Here we are setting the buffer 'pacData' address to the address
RX descriptor address. After this is called, the following function
must be called 'MAC_prepare_rx_descriptor'
must be called 'MAC_prepare_rx_descriptor'
to prepare the current rx descriptor for receiving the next packet.
*/
*pacData = (uint8_t *)g_mss_mac.rx_descriptors[ g_mss_mac.rx_desc_index ].buffer_1 ;
*/
*pacData = (uint8_t *)g_mss_mac.rx_descriptors[ g_mss_mac.rx_desc_index ].buffer_1 ;
}
return ((int32_t)frame_length);
}
@ -684,8 +679,6 @@ MSS_MAC_link_status
{
uint32_t link;
configASSERT( MAC_test_instance() == MAC_OK );
link = PHY_link_status();
if( link == MSS_MAC_LINK_STATUS_LINK ) {
link |= PHY_link_type();
@ -711,7 +704,6 @@ MSS_MAC_auto_setup_link
)
{
int32_t link;
configASSERT( MAC_test_instance() == MAC_OK );
PHY_auto_negotiate();
@ -746,7 +738,6 @@ MSS_MAC_set_mac_address
const uint8_t *new_address
)
{
configASSERT( MAC_test_instance() == MAC_OK );
/* Check if the new address is unicast */
configASSERT( (new_address[0]&1) == 0 );
@ -782,8 +773,6 @@ MSS_MAC_get_mac_address
uint8_t *address
)
{
configASSERT( MAC_test_instance() == MAC_OK );
MAC_memcpy( address, g_mss_mac.mac_address, 6u );
}
@ -801,7 +790,6 @@ MSS_MAC_set_mac_filters
const uint8_t *filters
)
{
configASSERT( MAC_test_instance() == MAC_OK );
configASSERT( (filter_count==0) || (filters != NULL_buffer) );
/* Check if the mac addresses is multicast */
{
@ -857,8 +845,6 @@ void EthernetMAC_IRQHandler( void )
uint32_t events;
uint32_t intr_status;
configASSERT( MAC_test_instance() == MAC_OK );
events = 0u;
intr_status = MAC->CSR5;
@ -876,7 +862,7 @@ void EthernetMAC_IRQHandler( void )
/* Clear interrupts */
MAC->CSR5 = CSR5_INT_BITS;
if( (events != 0u) && (g_mss_mac.listener != NULL_callback) ) {
g_mss_mac.listener( events );
}
@ -901,12 +887,10 @@ MSS_MAC_set_callback
MSS_MAC_callback_t listener
)
{
configASSERT( MAC_test_instance() == MAC_OK );
/* disable tx and rx interrupts */
MAC_BITBAND->CSR7_RIE = 0u;
MAC_BITBAND->CSR7_TIE = 0u;
g_mss_mac.listener = listener;
if( listener != NULL_callback ) {
@ -934,8 +918,6 @@ MSS_MAC_last_error
{
int8_t error_msg_nb;
const int8_t* returnvalue;
configASSERT( MAC_test_instance() == MAC_OK );
error_msg_nb = -(g_mss_mac.last_error);
if( error_msg_nb >= ERROR_MESSAGE_COUNT ) {
@ -962,7 +944,6 @@ MSS_MAC_get_statistics
)
{
uint32_t returnval = 0u;
configASSERT( MAC_test_instance() == MAC_OK );
switch( stat_id ) {
case MSS_MAC_RX_INTERRUPTS:
@ -1029,31 +1010,6 @@ MSS_MAC_get_statistics
/**************************** INTERNAL FUNCTIONS ******************************/
/***************************************************************************//**
* Checks if instace is valid.
*/
static int32_t
MAC_test_instance
(
void
)
{
uint32_t val1;
uint32_t val2;
int32_t retval = MAC_WRONG_PARAMETER;
val1 = MAC->CSR3;
val2 = MAC->CSR4;
if( (&g_mss_mac != NULL_instance) &&
((g_mss_mac.flags & FLAG_MAC_INIT_DONE) != 0u) &&
( val1 == (uint32_t)g_mss_mac.rx_descriptors) &&
(val2 == (uint32_t)g_mss_mac.tx_descriptors ) )
{
retval = MAC_OK;
}
return retval;
}
/***************************************************************************//**
* Prepares current rx descriptor for receiving.
@ -1092,7 +1048,7 @@ MSS_MAC_prepare_rx_descriptor
if( (desc & RDES0_CE) != 0u ) {
g_mss_mac.statistics.rx_crc_error++;
}
desc = MAC->CSR8;
g_mss_mac.statistics.rx_fifo_overflow +=
(desc & (CSR8_OCO_MASK|CSR8_FOC_MASK)) >> CSR8_FOC_SHIFT;
@ -1178,15 +1134,15 @@ MAC_send_setup_frame
/* Set descriptor */
MAC->CSR4 = (uint32_t)&descriptor;
/* Start transmission */
MAC_start_transmission();
/* Wait until transmission over */
ret = MAC_OK;
MAC_set_time_out( (uint32_t)SETUP_FRAME_TIME_OUT );
while( (((MAC->CSR5 & CSR5_TS_MASK) >> CSR5_TS_SHIFT) !=
while( (((MAC->CSR5 & CSR5_TS_MASK) >> CSR5_TS_SHIFT) !=
CSR5_TS_SUSPENDED) && (MAC_OK == ret) )
{
/* transmit poll demand */
@ -1200,7 +1156,7 @@ MAC_send_setup_frame
/* Set tx descriptor */
MAC->CSR4 = (uint32_t)g_mss_mac.tx_descriptors;
/* Start receiving and transmission */
MAC_start_receiving();
MAC_start_transmission();
@ -1224,7 +1180,7 @@ MAC_stop_transmission
{
int32_t retval = MAC_OK;
MAC_set_time_out( (uint16_t)STATE_CHANGE_TIME_OUT );
while( (((MAC->CSR5 & CSR5_TS_MASK) >> CSR5_TS_SHIFT) !=
CSR5_TS_STOPPED) && (retval == MAC_OK) )
{
@ -1305,7 +1261,7 @@ MAC_dismiss_bad_frames
{
int32_t dc = 0;
int8_t cont = 1;
if( MAC_BITBAND->CSR6_PB != 0u ) {
/* User wants bad frames too, don't dismiss anything */
cont = 0;
@ -1362,14 +1318,14 @@ MAC_get_time_out
{
uint32_t timer;
uint32_t time = 0u;
timer = ( MAC->CSR11 & CSR11_TIM_MASK );
if( timer > g_mss_mac.last_timer_value ) {
time = 0x0000ffffUL;
}
time += g_mss_mac.last_timer_value - timer;
if( MAC_BITBAND->CSR6_TTM == 0u ) {
time *= 10u;
}
@ -1414,10 +1370,6 @@ static void MAC_memset_All(MAC_instance_t *s, uint32_t c)
MAC_memset( s->mac_address, (uint8_t)c, 6u );
MAC_memset( s->mac_filter_data, (uint8_t)c, 90u );
s->phy_address = (uint8_t)c;
// for(count = 0; count<RX_RING_SIZE ;count++)
// {
// MAC_memset(s->rx_buffers[count], (uint8_t)c, (MSS_RX_BUFF_SIZE + 4u) );
// }
s->rx_desc_index =c;
for(count = 0; count<RX_RING_SIZE ;count++)
{
@ -1445,10 +1397,6 @@ static void MAC_memset_All(MAC_instance_t *s, uint32_t c)
s->statistics.tx_no_carrier = c;
s->statistics.tx_underflow_error = c;
s->time_out_value = c;
// for(count = 0; count < TX_RING_SIZE ;count++)
// {
// MAC_memset( s->tx_buffers[count], (uint8_t)c, MSS_TX_BUFF_SIZE );
// }
s->tx_desc_index = c;
for(count = 0; count < TX_RING_SIZE ;count++)
{
@ -1475,25 +1423,42 @@ static void MAC_memcpy(uint8_t *dest, const uint8_t *src, uint32_t n)
}
}
void MSS_MAC_TxBufferCompleted( void )
/***************************************************************************//**
* Check the buffers assigned to the Tx descriptors to ensure that none remain
* marked as in use even though the Tx has completed. This could happen if a
* Tx interrupt was missed.
*
*/
void MSS_MAC_CheckTxBufferStatus( void )
{
unsigned char *pxTransmittedBuffer;
long lDescriptor, lIndex;
/* Was it the second transmission that has completed? */
if( ( g_mss_mac.tx_descriptors[ 1 ].descriptor_0 & TDES0_OWN ) == 0UL )
for( lDescriptor = 1; lDescriptor < TX_RING_SIZE; lDescriptor++ )
{
pxTransmittedBuffer = ( unsigned char * ) g_mss_mac.tx_descriptors[ 1 ].buffer_1;
if( ( g_mss_mac.tx_descriptors[ lDescriptor ].descriptor_0 & TDES0_OWN ) == 0UL )
{
pxTransmittedBuffer = ( unsigned char * ) g_mss_mac.tx_descriptors[ lDescriptor ].buffer_1;
/* The buffer has been transmitted and is no longer in use. */
MAC_release_buffer( pxTransmittedBuffer );
}
else
{
// configASSERT( 0 );
for( lIndex = 0; lIndex < macNUM_BUFFERS; lIndex++ )
{
if( pxTransmittedBuffer == &( xMACBuffers.ucBuffer[ lIndex ][ 0 ] ) )
{
ucMACBufferInUse[ lIndex ] = pdFALSE;
}
}
}
}
}
static unsigned char *MAC_obtain_buffer( void )
/***************************************************************************//**
* Look through the array of buffers until one is found that is free for use -
* that is, not currently assigned to an Rx or a Tx descriptor. Mark the buffer
* as in use, then return its address.
*
* @return a pointer to a free buffer.
*/
unsigned char *MAC_obtain_buffer( void )
{
long lIndex;
unsigned char *pcReturn = NULL;
@ -1504,7 +1469,7 @@ unsigned char *pcReturn = NULL;
{
if( ucMACBufferInUse[ lIndex ] == pdFALSE )
{
pcReturn = &( ucMACBuffers[ lIndex ][ 0 ] );
pcReturn = &( xMACBuffers.ucBuffer[ lIndex ][ 0 ] );
ucMACBufferInUse[ lIndex ] = pdTRUE;
break;
}
@ -1514,6 +1479,10 @@ unsigned char *pcReturn = NULL;
return pcReturn;
}
/***************************************************************************//**
* Return a buffer to the list of free buffers, it was in use, but is not now.
*
*/
void MAC_release_buffer( unsigned char *pucBufferToRelease )
{
long lIndex;
@ -1522,7 +1491,7 @@ long lIndex;
it is currently pointing to is marked as being free again. */
for( lIndex = 0; lIndex < macNUM_BUFFERS; lIndex++ )
{
if( pucBufferToRelease == &( ucMACBuffers[ lIndex ][ 0 ] ) )
if( pucBufferToRelease == &( xMACBuffers.ucBuffer[ lIndex ][ 0 ] ) )
{
/* This is the buffer in use, mark it as being free. */
ucMACBufferInUse[ lIndex ] = pdFALSE;
@ -1530,6 +1499,10 @@ long lIndex;
}
}
/* Check the buffers pointed to by the Tx descriptors, just in case a Tx
interrupt has been missed and a free buffer remains marked as in use. */
MSS_MAC_CheckTxBufferStatus();
configASSERT( lIndex < macNUM_BUFFERS );
}

46
Demo/CORTEX_A2F200_IAR_and_Keil/MicroSemi_Code/drivers/mss_ethernet_mac/mss_ethernet_mac.h
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@ -16,7 +16,7 @@
#ifdef __cplusplus
extern "C" {
#endif
#endif
/******************************** DEFINES *************************************/
@ -160,7 +160,7 @@ extern "C" {
#define MSS_PHY_ADDRESS_AUTO_DETECT 255u
/***************************************************************************//**
* Listener function type defines the function prototype that might be followed
* Listener function type defines the function prototype that might be followed
* by MAC_isr which is triggered with each receive and transmit related interrupts.
* Listener functions should follow the following prototype:
* void MAC_Listener( uint32_t events );
@ -168,7 +168,7 @@ extern "C" {
* or events. Events input to the system are:
* #define MSS_MAC_EVENT_PACKET_SEND 1
* #define MSS_MAC_EVENT_PACKET_RECEIVED 2
* Listener function should be defined by the application using this driver if
* Listener function should be defined by the application using this driver if
* needed. This function may be assigned to the driver using MAC_set_callback
* routine and may be un assigned again by using the same routine with a NULL pointer
* as the event listener function. It is recommended to use this property for interrupt
@ -177,7 +177,7 @@ extern "C" {
typedef void (*MSS_MAC_callback_t)(uint32_t events);
/***************************************************************************//**
* Statistics counter identifiers are used with MAC_get_statistics routine to
* Statistics counter identifiers are used with MAC_get_statistics routine to
* receive the count of the requested errors/interrupts occurrences.
*
* MSS_MAC_RX_INTERRUPTS
@ -270,7 +270,7 @@ typedef enum {
MSS_MAC_TX_EXCESSIVE_COLLISION,
MSS_MAC_TX_COLLISION_COUNT,
MSS_MAC_TX_UNDERFLOW_ERROR
} mss_mac_statistics_id_t;
} mss_mac_statistics_id_t;
/******************************* FUNCTIONS ************************************/
@ -317,7 +317,7 @@ MSS_MAC_configure
/***************************************************************************//**
* Returns the configuration of the Ethernet Controller.
* After the MAC_init function has been called, this API function can be used to
* After the MAC_init function has been called, this API function can be used to
* get the configuration of the Ethernet Controller.
*
* @return The logical OR of the following values:
@ -366,7 +366,7 @@ MSS_MAC_tx_packet
* Returns available packet's size.
*
* @return Size of packet, bigger than 0, if a packet is available,
* if not, returns 0.
* if not, returns 0.
* @see MAC_rx_packet()
*/
int32_t
@ -416,26 +416,26 @@ MSS_MAC_rx_packet
used by the user application or copied to another buffer, the
MSS_MAC_prepare_rx_descriptor() function must be called to free up the receive
memory buffer used by the MSS Ethernet MAC
@param pacData
The pacData parameter is a pointer to a memory buffer pointer. The uint8_t
pointer pointed to by the pacData parameter will contain the address of the
memory buffer containing the received packet after this function returns. The
value of pacData is only valid if the return value is larger than zero,
indicating that a packet was received.
@param time_out
The time_out parameter is the timeout value for the transmission in milliseconds.
The time_out parameter value can be one of the following values:
• Unsigned integer greater than 0 and less than 0x01000000
• MSS_MAC_BLOCKING – there will be no timeout.
• MSS_MAC_BLOCKING – there will be no timeout.
• MSS_MAC_NONBLOCKING – the function will return immediately if no packets
have been received.
have been received.
@return
The function returns the size of the packet if the packet fits in pacData.
Returns zero if there is no received packet.
@see MAC_rx_pckt_size()
@see MAC_tx_packet()
*/
@ -537,10 +537,10 @@ MSS_MAC_set_callback
/***************************************************************************//**
* Returns description of latest error happened.
*
* @return A string describing the error. This string must not be
* @return A string describing the error. This string must not be
* modified by the application.
*/
const int8_t*
const int8_t*
MSS_MAC_last_error
(
void
@ -549,7 +549,7 @@ MSS_MAC_last_error
/***************************************************************************//**
* Returns statistics counter of stat_id identifier.
*
*
* @param stat_id Identifier of statistics counter.
* @return Statistics counter of stat_id identifier.
* On error returns 0.
@ -560,23 +560,11 @@ MSS_MAC_get_statistics
mss_mac_statistics_id_t stat_id
);
/*
* Ensure uip_buf is pointing to a valid and free buffer before any transmissions
* initiated by the uIP stack occur.
*/
unsigned char *MSS_MAC_GetTxDescriptor( void );
/*
* A buffer is no longer required by the application. Hand it back to the
* control of the MAC hardware.
*/
void MSS_MAC_ReleaseBuffer( unsigned char *pucBuffer );
/*
* The double Tx has completed. Hand back the Tx buffer to the control of
* the MAC hardware.
* the MAC hardware.
*/
void MSS_MAC_TxBufferCompleted( void );
void MSS_MAC_CheckTxBufferStatus( void );
#ifdef __cplusplus
}
#endif

2
Demo/CORTEX_A2F200_IAR_and_Keil/MicroSemi_Code/drivers/mss_ethernet_mac/mss_ethernet_mac_regs.h
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@ -66,12 +66,10 @@ typedef struct {
/* transmit related info: */
uint32_t tx_desc_index; /**< index of the transmit descriptor getting used*/
// uint8_t tx_buffers[TX_RING_SIZE][MSS_TX_BUFF_SIZE];/**< array of transmit buffers*/
MAC_descriptor_t tx_descriptors[TX_RING_SIZE];/**< array of transmit descriptors*/
/* receive related info: */
uint32_t rx_desc_index; /**< index of the receive descriptor getting used*/
// uint8_t rx_buffers[RX_RING_SIZE][MSS_RX_BUFF_SIZE+4];/**< array of receive buffers*/
MAC_descriptor_t rx_descriptors[RX_RING_SIZE];/**< array of receive descriptors*/
uint8_t phy_address; /**< MII address of the connected PHY*/

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