76 ef4_rx_buf_next(struct ef4_rx_queue *rx_queue, struct ef4_rx_buffer *rx_buf)  in ef4_rx_buf_next()  argument
78 	if (unlikely(rx_buf == ef4_rx_buffer(rx_queue, rx_queue->ptr_mask)))  in ef4_rx_buf_next()
79 		return ef4_rx_buffer(rx_queue, 0);  in ef4_rx_buf_next()
106 static struct page *ef4_reuse_page(struct ef4_rx_queue *rx_queue)  in ef4_reuse_page()  argument
108 	struct ef4_nic *efx = rx_queue->efx;  in ef4_reuse_page()
113 	index = rx_queue->page_remove & rx_queue->page_ptr_mask;  in ef4_reuse_page()
114 	page = rx_queue->page_ring[index];  in ef4_reuse_page()
118 	rx_queue->page_ring[index] = NULL;  in ef4_reuse_page()
120 	if (rx_queue->page_remove != rx_queue->page_add)  in ef4_reuse_page()
121 		++rx_queue->page_remove;  in ef4_reuse_page()
125 		++rx_queue->page_recycle_count;  in ef4_reuse_page()
133 		++rx_queue->page_recycle_failed;  in ef4_reuse_page()
149 static int ef4_init_rx_buffers(struct ef4_rx_queue *rx_queue, bool atomic)  in ef4_init_rx_buffers()  argument
151 	struct ef4_nic *efx = rx_queue->efx;  in ef4_init_rx_buffers()
161 		page = ef4_reuse_page(rx_queue);  in ef4_init_rx_buffers()
188 			index = rx_queue->added_count & rx_queue->ptr_mask;  in ef4_init_rx_buffers()
189 			rx_buf = ef4_rx_buffer(rx_queue, index);  in ef4_init_rx_buffers()
195 			++rx_queue->added_count;  in ef4_init_rx_buffers()
224 static void ef4_free_rx_buffers(struct ef4_rx_queue *rx_queue,  in ef4_free_rx_buffers()  argument
233 		rx_buf = ef4_rx_buf_next(rx_queue, rx_buf);  in ef4_free_rx_buffers()
245 	struct ef4_rx_queue *rx_queue = ef4_channel_get_rx_queue(channel);  in ef4_recycle_rx_page()  local
246 	struct ef4_nic *efx = rx_queue->efx;  in ef4_recycle_rx_page()
253 	index = rx_queue->page_add & rx_queue->page_ptr_mask;  in ef4_recycle_rx_page()
254 	if (rx_queue->page_ring[index] == NULL) {  in ef4_recycle_rx_page()
255 		unsigned read_index = rx_queue->page_remove &  in ef4_recycle_rx_page()
256 			rx_queue->page_ptr_mask;  in ef4_recycle_rx_page()
263 			++rx_queue->page_remove;  in ef4_recycle_rx_page()
264 		rx_queue->page_ring[index] = page;  in ef4_recycle_rx_page()
265 		++rx_queue->page_add;  in ef4_recycle_rx_page()
268 	++rx_queue->page_recycle_full;  in ef4_recycle_rx_page()
273 static void ef4_fini_rx_buffer(struct ef4_rx_queue *rx_queue,  in ef4_fini_rx_buffer()  argument
282 		ef4_unmap_rx_buffer(rx_queue->efx, rx_buf);  in ef4_fini_rx_buffer()
283 		ef4_free_rx_buffers(rx_queue, rx_buf, 1);  in ef4_fini_rx_buffer()
293 	struct ef4_rx_queue *rx_queue = ef4_channel_get_rx_queue(channel);  in ef4_recycle_rx_pages()  local
297 		rx_buf = ef4_rx_buf_next(rx_queue, rx_buf);  in ef4_recycle_rx_pages()
305 	struct ef4_rx_queue *rx_queue = ef4_channel_get_rx_queue(channel);  in ef4_discard_rx_packet()  local
309 	ef4_free_rx_buffers(rx_queue, rx_buf, n_frags);  in ef4_discard_rx_packet()
324 void ef4_fast_push_rx_descriptors(struct ef4_rx_queue *rx_queue, bool atomic)  in ef4_fast_push_rx_descriptors()  argument
326 	struct ef4_nic *efx = rx_queue->efx;  in ef4_fast_push_rx_descriptors()
330 	if (!rx_queue->refill_enabled)  in ef4_fast_push_rx_descriptors()
334 	fill_level = (rx_queue->added_count - rx_queue->removed_count);  in ef4_fast_push_rx_descriptors()
335 	EF4_BUG_ON_PARANOID(fill_level > rx_queue->efx->rxq_entries);  in ef4_fast_push_rx_descriptors()
336 	if (fill_level >= rx_queue->fast_fill_trigger)  in ef4_fast_push_rx_descriptors()
340 	if (unlikely(fill_level < rx_queue->min_fill)) {  in ef4_fast_push_rx_descriptors()
342 			rx_queue->min_fill = fill_level;  in ef4_fast_push_rx_descriptors()
346 	space = rx_queue->max_fill - fill_level;  in ef4_fast_push_rx_descriptors()
349 	netif_vdbg(rx_queue->efx, rx_status, rx_queue->efx->net_dev,  in ef4_fast_push_rx_descriptors()
352 		   ef4_rx_queue_index(rx_queue), fill_level,  in ef4_fast_push_rx_descriptors()
353 		   rx_queue->max_fill);  in ef4_fast_push_rx_descriptors()
357 		rc = ef4_init_rx_buffers(rx_queue, atomic);  in ef4_fast_push_rx_descriptors()
360 			if (rx_queue->added_count == rx_queue->removed_count)  in ef4_fast_push_rx_descriptors()
361 				ef4_schedule_slow_fill(rx_queue);  in ef4_fast_push_rx_descriptors()
366 	netif_vdbg(rx_queue->efx, rx_status, rx_queue->efx->net_dev,  in ef4_fast_push_rx_descriptors()
368 		   "to level %d\n", ef4_rx_queue_index(rx_queue),  in ef4_fast_push_rx_descriptors()
369 		   rx_queue->added_count - rx_queue->removed_count);  in ef4_fast_push_rx_descriptors()
372 	if (rx_queue->notified_count != rx_queue->added_count)  in ef4_fast_push_rx_descriptors()
373 		ef4_nic_notify_rx_desc(rx_queue);  in ef4_fast_push_rx_descriptors()
378 	struct ef4_rx_queue *rx_queue = from_timer(rx_queue, t, slow_fill);  in ef4_rx_slow_fill()  local
381 	ef4_nic_generate_fill_event(rx_queue);  in ef4_rx_slow_fill()
382 	++rx_queue->slow_fill_count;  in ef4_rx_slow_fill()
385 static void ef4_rx_packet__check_len(struct ef4_rx_queue *rx_queue,  in ef4_rx_packet__check_len()  argument
389 	struct ef4_nic *efx = rx_queue->efx;  in ef4_rx_packet__check_len()
405 				  ef4_rx_queue_index(rx_queue), len, max_len,  in ef4_rx_packet__check_len()
413 				  ef4_rx_queue_index(rx_queue), len, max_len);  in ef4_rx_packet__check_len()
416 	ef4_rx_queue_channel(rx_queue)->n_rx_overlength++;  in ef4_rx_packet__check_len()
432 		struct ef4_rx_queue *rx_queue;  in ef4_rx_packet_gro()  local
434 		rx_queue = ef4_channel_get_rx_queue(channel);  in ef4_rx_packet_gro()
435 		ef4_free_rx_buffers(rx_queue, rx_buf, n_frags);  in ef4_rx_packet_gro()
454 		rx_buf = ef4_rx_buf_next(&channel->rx_queue, rx_buf);  in ef4_rx_packet_gro()
460 	skb_record_rx_queue(skb, channel->rx_queue.core_index);  in ef4_rx_packet_gro()
505 			rx_buf = ef4_rx_buf_next(&channel->rx_queue, rx_buf);  in ef4_rx_mk_skb()
523 void ef4_rx_packet(struct ef4_rx_queue *rx_queue, unsigned int index,  in ef4_rx_packet()  argument
526 	struct ef4_nic *efx = rx_queue->efx;  in ef4_rx_packet()
527 	struct ef4_channel *channel = ef4_rx_queue_channel(rx_queue);  in ef4_rx_packet()
530 	rx_queue->rx_packets++;  in ef4_rx_packet()
532 	rx_buf = ef4_rx_buffer(rx_queue, index);  in ef4_rx_packet()
538 			ef4_rx_packet__check_len(rx_queue, rx_buf, len);  in ef4_rx_packet()
552 		   ef4_rx_queue_index(rx_queue), index,  in ef4_rx_packet()
553 		   (index + n_frags - 1) & rx_queue->ptr_mask, len,  in ef4_rx_packet()
589 			rx_buf = ef4_rx_buf_next(rx_queue, rx_buf);  in ef4_rx_packet()
599 	rx_buf = ef4_rx_buffer(rx_queue, index);  in ef4_rx_packet()
619 		struct ef4_rx_queue *rx_queue;  in ef4_rx_deliver()  local
621 		rx_queue = ef4_channel_get_rx_queue(channel);  in ef4_rx_deliver()
622 		ef4_free_rx_buffers(rx_queue, rx_buf, n_frags);  in ef4_rx_deliver()
625 	skb_record_rx_queue(skb, channel->rx_queue.core_index);  in ef4_rx_deliver()
645 		ef4_rx_buffer(&channel->rx_queue, channel->rx_pkt_index);  in __ef4_rx_packet()
659 		struct ef4_rx_queue *rx_queue;  in __ef4_rx_packet()  local
662 		rx_queue = ef4_channel_get_rx_queue(channel);  in __ef4_rx_packet()
663 		ef4_free_rx_buffers(rx_queue, rx_buf,  in __ef4_rx_packet()
679 int ef4_probe_rx_queue(struct ef4_rx_queue *rx_queue)  in ef4_probe_rx_queue()  argument
681 	struct ef4_nic *efx = rx_queue->efx;  in ef4_probe_rx_queue()
688 	rx_queue->ptr_mask = entries - 1;  in ef4_probe_rx_queue()
692 		  ef4_rx_queue_index(rx_queue), efx->rxq_entries,  in ef4_probe_rx_queue()
693 		  rx_queue->ptr_mask);  in ef4_probe_rx_queue()
696 	rx_queue->buffer = kcalloc(entries, sizeof(*rx_queue->buffer),  in ef4_probe_rx_queue()
698 	if (!rx_queue->buffer)  in ef4_probe_rx_queue()
701 	rc = ef4_nic_probe_rx(rx_queue);  in ef4_probe_rx_queue()
703 		kfree(rx_queue->buffer);  in ef4_probe_rx_queue()
704 		rx_queue->buffer = NULL;  in ef4_probe_rx_queue()
711 				     struct ef4_rx_queue *rx_queue)  in ef4_init_rx_recycle_ring()  argument
727 	rx_queue->page_ring = kcalloc(page_ring_size,  in ef4_init_rx_recycle_ring()
728 				      sizeof(*rx_queue->page_ring), GFP_KERNEL);  in ef4_init_rx_recycle_ring()
729 	rx_queue->page_ptr_mask = page_ring_size - 1;  in ef4_init_rx_recycle_ring()
732 void ef4_init_rx_queue(struct ef4_rx_queue *rx_queue)  in ef4_init_rx_queue()  argument
734 	struct ef4_nic *efx = rx_queue->efx;  in ef4_init_rx_queue()
737 	netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,  in ef4_init_rx_queue()
738 		  "initialising RX queue %d\n", ef4_rx_queue_index(rx_queue));  in ef4_init_rx_queue()
741 	rx_queue->added_count = 0;  in ef4_init_rx_queue()
742 	rx_queue->notified_count = 0;  in ef4_init_rx_queue()
743 	rx_queue->removed_count = 0;  in ef4_init_rx_queue()
744 	rx_queue->min_fill = -1U;  in ef4_init_rx_queue()
745 	ef4_init_rx_recycle_ring(efx, rx_queue);  in ef4_init_rx_queue()
747 	rx_queue->page_remove = 0;  in ef4_init_rx_queue()
748 	rx_queue->page_add = rx_queue->page_ptr_mask + 1;  in ef4_init_rx_queue()
749 	rx_queue->page_recycle_count = 0;  in ef4_init_rx_queue()
750 	rx_queue->page_recycle_failed = 0;  in ef4_init_rx_queue()
751 	rx_queue->page_recycle_full = 0;  in ef4_init_rx_queue()
765 	rx_queue->max_fill = max_fill;  in ef4_init_rx_queue()
766 	rx_queue->fast_fill_trigger = trigger;  in ef4_init_rx_queue()
767 	rx_queue->refill_enabled = true;  in ef4_init_rx_queue()
770 	ef4_nic_init_rx(rx_queue);  in ef4_init_rx_queue()
773 void ef4_fini_rx_queue(struct ef4_rx_queue *rx_queue)  in ef4_fini_rx_queue()  argument
776 	struct ef4_nic *efx = rx_queue->efx;  in ef4_fini_rx_queue()
779 	netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,  in ef4_fini_rx_queue()
780 		  "shutting down RX queue %d\n", ef4_rx_queue_index(rx_queue));  in ef4_fini_rx_queue()
782 	del_timer_sync(&rx_queue->slow_fill);  in ef4_fini_rx_queue()
785 	if (rx_queue->buffer) {  in ef4_fini_rx_queue()
786 		for (i = rx_queue->removed_count; i < rx_queue->added_count;  in ef4_fini_rx_queue()
788 			unsigned index = i & rx_queue->ptr_mask;  in ef4_fini_rx_queue()
789 			rx_buf = ef4_rx_buffer(rx_queue, index);  in ef4_fini_rx_queue()
790 			ef4_fini_rx_buffer(rx_queue, rx_buf);  in ef4_fini_rx_queue()
795 	for (i = 0; i <= rx_queue->page_ptr_mask; i++) {  in ef4_fini_rx_queue()
796 		struct page *page = rx_queue->page_ring[i];  in ef4_fini_rx_queue()
808 	kfree(rx_queue->page_ring);  in ef4_fini_rx_queue()
809 	rx_queue->page_ring = NULL;  in ef4_fini_rx_queue()
812 void ef4_remove_rx_queue(struct ef4_rx_queue *rx_queue)  in ef4_remove_rx_queue()  argument
814 	netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,  in ef4_remove_rx_queue()
815 		  "destroying RX queue %d\n", ef4_rx_queue_index(rx_queue));  in ef4_remove_rx_queue()
817 	ef4_nic_remove_rx(rx_queue);  in ef4_remove_rx_queue()
819 	kfree(rx_queue->buffer);  in ef4_remove_rx_queue()
820 	rx_queue->buffer = NULL;  in ef4_remove_rx_queue()