| typedef struct my_custom_pbuf |
| { |
| struct pbuf_custom p; |
| void* dma_descriptor; |
| } my_custom_pbuf_t; |
| |
| LWIP_MEMPOOL_DECLARE(RX_POOL, 10, sizeof(my_custom_pbuf_t), "Zero-copy RX PBUF pool"); |
| |
| void my_pbuf_free_custom(void* p) |
| { |
| SYS_ARCH_DECL_PROTECT(old_level); |
| |
| my_custom_pbuf_t* my_puf = (my_custom_pbuf_t*)p; |
| |
| // invalidate data cache here - lwIP and/or application may have written into buffer! |
| // (invalidate is faster than flushing, and noone needs the correct data in the buffer) |
| invalidate_cpu_cache(p->payload, p->tot_len); |
| |
| SYS_ARCH_PROTECT(old_level); |
| free_rx_dma_descriptor(my_pbuf->dma_descriptor); |
| LWIP_MEMPOOL_FREE(RX_POOL, my_pbuf); |
| SYS_ARCH_UNPROTECT(old_level); |
| } |
| |
| void eth_rx_irq() |
| { |
| dma_descriptor* dma_desc = get_RX_DMA_descriptor_from_ethernet(); |
| my_custom_pbuf_t* my_pbuf = (my_custom_pbuf_t*)LWIP_MEMPOOL_ALLOC(RX_POOL); |
| |
| my_pbuf->p.custom_free_function = my_pbuf_free_custom; |
| my_pbuf->dma_descriptor = dma_desc; |
| |
| invalidate_cpu_cache(dma_desc->rx_data, dma_desc->rx_length); |
| |
| struct pbuf* p = pbuf_alloced_custom(PBUF_RAW, |
| dma_desc->rx_length, |
| PBUF_REF, |
| &my_pbuf->p, |
| dma_desc->rx_data, |
| dma_desc->max_buffer_size); |
| |
| if(netif->input(p, netif) != ERR_OK) { |
| pbuf_free(p); |
| } |
| } |