ethernet/sfc/tx_tso.c

79 static inline void prefetch_ptr(struct efx_tx_queue *tx_queue)
81 	unsigned int insert_ptr = efx_tx_queue_get_insert_index(tx_queue);
84 	ptr = (char *) (tx_queue->buffer + insert_ptr);
88 	ptr = (char *)(((efx_qword_t *)tx_queue->txd.addr) + insert_ptr);
95  * @tx_queue:		Efx TX queue
102 static void efx_tx_queue_insert(struct efx_tx_queue *tx_queue,
112 		buffer = efx_tx_queue_get_insert_buffer(tx_queue);
113 		++tx_queue->insert_count;
115 		EFX_WARN_ON_ONCE_PARANOID(tx_queue->insert_count -
116 					  tx_queue->read_count >=
117 					  tx_queue->efx->txq_entries);
121 		dma_len = tx_queue->efx->type->tx_limit_len(tx_queue,
170 		     struct efx_tx_queue *tx_queue,
225  * @tx_queue:		Efx TX queue
232 static void tso_fill_packet_with_fragment(struct efx_tx_queue *tx_queue,
253 	efx_tx_queue_insert(tx_queue, st->dma_addr, n, &buffer);
278  * @tx_queue:		Efx TX queue
285 static int tso_start_new_packet(struct efx_tx_queue *tx_queue,
290 		efx_tx_queue_get_insert_buffer(tx_queue);
319 	++tx_queue->insert_count;
324 	buffer = efx_tx_queue_get_insert_buffer(tx_queue);
339 	++tx_queue->insert_count;
351  * @tx_queue:		Efx TX queue
358  * Add socket buffer @skb to @tx_queue, doing TSO or return != 0 if
362 int efx_enqueue_skb_tso(struct efx_tx_queue *tx_queue,
366 	struct efx_nic *efx = tx_queue->efx;
370 	if (tx_queue->tso_version != 1)
378 	EFX_WARN_ON_ONCE_PARANOID(tx_queue->write_count != tx_queue->insert_count);
380 	rc = tso_start(&state, efx, tx_queue, skb);
397 	rc = tso_start_new_packet(tx_queue, skb, &state);
401 	prefetch_ptr(tx_queue);
404 		tso_fill_packet_with_fragment(tx_queue, skb, &state);
419 			rc = tso_start_new_packet(tx_queue, skb, &state);