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