diff options
Diffstat (limited to 'c/src/libchip/network/dwmac-desc-com.c')
-rw-r--r-- | c/src/libchip/network/dwmac-desc-com.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/c/src/libchip/network/dwmac-desc-com.c b/c/src/libchip/network/dwmac-desc-com.c new file mode 100644 index 0000000000..ecbd2624db --- /dev/null +++ b/c/src/libchip/network/dwmac-desc-com.c @@ -0,0 +1,60 @@ +/** + * @file + * + * @brief DWMAC 10/100/1000 Common Descriptor Handling + * + * DWMAC 10/100/1000 on-chip Ethernet controllers. + * Functions which are common to normal and enhanced DMA descriptors. + */ + +/* + * Copyright (c) 2013 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Dornierstr. 4 + * 82178 Puchheim + * Germany + * <rtems@embedded-brains.de> + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#include "dwmac-desc-com.h" + +#undef DWMAC_DESC_COM_DEBUG +#ifdef DWMAC_DESC_COM_DEBUG +#define DWMAC_DESC_COM_PRINT_DBG( fmt, args ... ) printk( fmt, ## args ) +#else +#define DWMAC_DESC_COM_PRINT_DBG( fmt, args ... ) do { } while ( 0 ) +#endif + +struct mbuf *dwmac_desc_com_new_mbuf( dwmac_common_context *self ) { + struct ifnet *ifp = &self->arpcom.ac_if; + struct mbuf *m = NULL; + + + MGETHDR( m, M_DONTWAIT, MT_DATA ); + + if ( m != NULL ) { + MCLGET( m, M_DONTWAIT ); + + if ( m->m_ext.ext_buf != NULL ) { + if ( ( m->m_flags & M_EXT ) != 0 ) { + /* Set receive interface */ + m->m_pkthdr.rcvif = ifp; + + /* Make sure packet data will be aligned */ + m->m_data = mtod( m, char * ) + ETHER_ALIGN; + return m; + } else { + m_free( m ); + } + } else { + m_free( m ); + } + } + + return NULL; +} |