76 efx_rx_buf_next(struct efx_rx_queue *rx_queue, struct efx_rx_buffer *rx_buf)  in efx_rx_buf_next()  argument
78 	if (unlikely(rx_buf == efx_rx_buffer(rx_queue, rx_queue->ptr_mask)))  in efx_rx_buf_next()
79 		return efx_rx_buffer(rx_queue, 0);  in efx_rx_buf_next()
106 static struct page *efx_reuse_page(struct efx_rx_queue *rx_queue)  in efx_reuse_page()  argument
108 	struct efx_nic *efx = rx_queue->efx;  in efx_reuse_page()
113 	index = rx_queue->page_remove & rx_queue->page_ptr_mask;  in efx_reuse_page()
114 	page = rx_queue->page_ring[index];  in efx_reuse_page()
118 	rx_queue->page_ring[index] = NULL;  in efx_reuse_page()
120 	if (rx_queue->page_remove != rx_queue->page_add)  in efx_reuse_page()
121 		++rx_queue->page_remove;  in efx_reuse_page()
125 		++rx_queue->page_recycle_count;  in efx_reuse_page()
133 		++rx_queue->page_recycle_failed;  in efx_reuse_page()
149 static int efx_init_rx_buffers(struct efx_rx_queue *rx_queue, bool atomic)  in efx_init_rx_buffers()  argument
151 	struct efx_nic *efx = rx_queue->efx;  in efx_init_rx_buffers()
161 		page = efx_reuse_page(rx_queue);  in efx_init_rx_buffers()
188 			index = rx_queue->added_count & rx_queue->ptr_mask;  in efx_init_rx_buffers()
189 			rx_buf = efx_rx_buffer(rx_queue, index);  in efx_init_rx_buffers()
195 			++rx_queue->added_count;  in efx_init_rx_buffers()
224 static void efx_free_rx_buffers(struct efx_rx_queue *rx_queue,  in efx_free_rx_buffers()  argument
233 		rx_buf = efx_rx_buf_next(rx_queue, rx_buf);  in efx_free_rx_buffers()
245 	struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);  in efx_recycle_rx_page()  local
246 	struct efx_nic *efx = rx_queue->efx;  in efx_recycle_rx_page()
253 	index = rx_queue->page_add & rx_queue->page_ptr_mask;  in efx_recycle_rx_page()
254 	if (rx_queue->page_ring[index] == NULL) {  in efx_recycle_rx_page()
255 		unsigned read_index = rx_queue->page_remove &  in efx_recycle_rx_page()
256 			rx_queue->page_ptr_mask;  in efx_recycle_rx_page()
263 			++rx_queue->page_remove;  in efx_recycle_rx_page()
264 		rx_queue->page_ring[index] = page;  in efx_recycle_rx_page()
265 		++rx_queue->page_add;  in efx_recycle_rx_page()
268 	++rx_queue->page_recycle_full;  in efx_recycle_rx_page()
273 static void efx_fini_rx_buffer(struct efx_rx_queue *rx_queue,  in efx_fini_rx_buffer()  argument
282 		efx_unmap_rx_buffer(rx_queue->efx, rx_buf);  in efx_fini_rx_buffer()
283 		efx_free_rx_buffers(rx_queue, rx_buf, 1);  in efx_fini_rx_buffer()
293 	struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);  in efx_recycle_rx_pages()  local
297 		rx_buf = efx_rx_buf_next(rx_queue, rx_buf);  in efx_recycle_rx_pages()
305 	struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);  in efx_discard_rx_packet()  local
309 	efx_free_rx_buffers(rx_queue, rx_buf, n_frags);  in efx_discard_rx_packet()
324 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic)  in efx_fast_push_rx_descriptors()  argument
326 	struct efx_nic *efx = rx_queue->efx;  in efx_fast_push_rx_descriptors()
330 	if (!rx_queue->refill_enabled)  in efx_fast_push_rx_descriptors()
334 	fill_level = (rx_queue->added_count - rx_queue->removed_count);  in efx_fast_push_rx_descriptors()
335 	EFX_WARN_ON_ONCE_PARANOID(fill_level > rx_queue->efx->rxq_entries);  in efx_fast_push_rx_descriptors()
336 	if (fill_level >= rx_queue->fast_fill_trigger)  in efx_fast_push_rx_descriptors()
340 	if (unlikely(fill_level < rx_queue->min_fill)) {  in efx_fast_push_rx_descriptors()
342 			rx_queue->min_fill = fill_level;  in efx_fast_push_rx_descriptors()
346 	space = rx_queue->max_fill - fill_level;  in efx_fast_push_rx_descriptors()
349 	netif_vdbg(rx_queue->efx, rx_status, rx_queue->efx->net_dev,  in efx_fast_push_rx_descriptors()
352 		   efx_rx_queue_index(rx_queue), fill_level,  in efx_fast_push_rx_descriptors()
353 		   rx_queue->max_fill);  in efx_fast_push_rx_descriptors()
357 		rc = efx_init_rx_buffers(rx_queue, atomic);  in efx_fast_push_rx_descriptors()
360 			efx_schedule_slow_fill(rx_queue);  in efx_fast_push_rx_descriptors()
365 	netif_vdbg(rx_queue->efx, rx_status, rx_queue->efx->net_dev,  in efx_fast_push_rx_descriptors()
367 		   "to level %d\n", efx_rx_queue_index(rx_queue),  in efx_fast_push_rx_descriptors()
368 		   rx_queue->added_count - rx_queue->removed_count);  in efx_fast_push_rx_descriptors()
371 	if (rx_queue->notified_count != rx_queue->added_count)  in efx_fast_push_rx_descriptors()
372 		efx_nic_notify_rx_desc(rx_queue);  in efx_fast_push_rx_descriptors()
377 	struct efx_rx_queue *rx_queue = from_timer(rx_queue, t, slow_fill);  in efx_rx_slow_fill()  local
380 	efx_nic_generate_fill_event(rx_queue);  in efx_rx_slow_fill()
381 	++rx_queue->slow_fill_count;  in efx_rx_slow_fill()
384 static void efx_rx_packet__check_len(struct efx_rx_queue *rx_queue,  in efx_rx_packet__check_len()  argument
388 	struct efx_nic *efx = rx_queue->efx;  in efx_rx_packet__check_len()
402 			  efx_rx_queue_index(rx_queue), len, max_len);  in efx_rx_packet__check_len()
404 	efx_rx_queue_channel(rx_queue)->n_rx_overlength++;  in efx_rx_packet__check_len()
420 		struct efx_rx_queue *rx_queue;  in efx_rx_packet_gro()  local
422 		rx_queue = efx_channel_get_rx_queue(channel);  in efx_rx_packet_gro()
423 		efx_free_rx_buffers(rx_queue, rx_buf, n_frags);  in efx_rx_packet_gro()
443 		rx_buf = efx_rx_buf_next(&channel->rx_queue, rx_buf);  in efx_rx_packet_gro()
449 	skb_record_rx_queue(skb, channel->rx_queue.core_index);  in efx_rx_packet_gro()
494 			rx_buf = efx_rx_buf_next(&channel->rx_queue, rx_buf);  in efx_rx_mk_skb()
512 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,  in efx_rx_packet()  argument
515 	struct efx_nic *efx = rx_queue->efx;  in efx_rx_packet()
516 	struct efx_channel *channel = efx_rx_queue_channel(rx_queue);  in efx_rx_packet()
519 	rx_queue->rx_packets++;  in efx_rx_packet()
521 	rx_buf = efx_rx_buffer(rx_queue, index);  in efx_rx_packet()
527 			efx_rx_packet__check_len(rx_queue, rx_buf, len);  in efx_rx_packet()
541 		   efx_rx_queue_index(rx_queue), index,  in efx_rx_packet()
542 		   (index + n_frags - 1) & rx_queue->ptr_mask, len,  in efx_rx_packet()
578 			rx_buf = efx_rx_buf_next(rx_queue, rx_buf);  in efx_rx_packet()
588 	rx_buf = efx_rx_buffer(rx_queue, index);  in efx_rx_packet()
608 		struct efx_rx_queue *rx_queue;  in efx_rx_deliver()  local
610 		rx_queue = efx_channel_get_rx_queue(channel);  in efx_rx_deliver()
611 		efx_free_rx_buffers(rx_queue, rx_buf, n_frags);  in efx_rx_deliver()
614 	skb_record_rx_queue(skb, channel->rx_queue.core_index);  in efx_rx_deliver()
643 		efx_rx_buffer(&channel->rx_queue, channel->rx_pkt_index);  in __efx_rx_packet()
657 		struct efx_rx_queue *rx_queue;  in __efx_rx_packet()  local
660 		rx_queue = efx_channel_get_rx_queue(channel);  in __efx_rx_packet()
661 		efx_free_rx_buffers(rx_queue, rx_buf,  in __efx_rx_packet()
677 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue)  in efx_probe_rx_queue()  argument
679 	struct efx_nic *efx = rx_queue->efx;  in efx_probe_rx_queue()
686 	rx_queue->ptr_mask = entries - 1;  in efx_probe_rx_queue()
690 		  efx_rx_queue_index(rx_queue), efx->rxq_entries,  in efx_probe_rx_queue()
691 		  rx_queue->ptr_mask);  in efx_probe_rx_queue()
694 	rx_queue->buffer = kcalloc(entries, sizeof(*rx_queue->buffer),  in efx_probe_rx_queue()
696 	if (!rx_queue->buffer)  in efx_probe_rx_queue()
699 	rc = efx_nic_probe_rx(rx_queue);  in efx_probe_rx_queue()
701 		kfree(rx_queue->buffer);  in efx_probe_rx_queue()
702 		rx_queue->buffer = NULL;  in efx_probe_rx_queue()
709 				     struct efx_rx_queue *rx_queue)  in efx_init_rx_recycle_ring()  argument
725 	rx_queue->page_ring = kcalloc(page_ring_size,  in efx_init_rx_recycle_ring()
726 				      sizeof(*rx_queue->page_ring), GFP_KERNEL);  in efx_init_rx_recycle_ring()
727 	rx_queue->page_ptr_mask = page_ring_size - 1;  in efx_init_rx_recycle_ring()
730 void efx_init_rx_queue(struct efx_rx_queue *rx_queue)  in efx_init_rx_queue()  argument
732 	struct efx_nic *efx = rx_queue->efx;  in efx_init_rx_queue()
735 	netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,  in efx_init_rx_queue()
736 		  "initialising RX queue %d\n", efx_rx_queue_index(rx_queue));  in efx_init_rx_queue()
739 	rx_queue->added_count = 0;  in efx_init_rx_queue()
740 	rx_queue->notified_count = 0;  in efx_init_rx_queue()
741 	rx_queue->removed_count = 0;  in efx_init_rx_queue()
742 	rx_queue->min_fill = -1U;  in efx_init_rx_queue()
743 	efx_init_rx_recycle_ring(efx, rx_queue);  in efx_init_rx_queue()
745 	rx_queue->page_remove = 0;  in efx_init_rx_queue()
746 	rx_queue->page_add = rx_queue->page_ptr_mask + 1;  in efx_init_rx_queue()
747 	rx_queue->page_recycle_count = 0;  in efx_init_rx_queue()
748 	rx_queue->page_recycle_failed = 0;  in efx_init_rx_queue()
749 	rx_queue->page_recycle_full = 0;  in efx_init_rx_queue()
763 	rx_queue->max_fill = max_fill;  in efx_init_rx_queue()
764 	rx_queue->fast_fill_trigger = trigger;  in efx_init_rx_queue()
765 	rx_queue->refill_enabled = true;  in efx_init_rx_queue()
768 	efx_nic_init_rx(rx_queue);  in efx_init_rx_queue()
771 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue)  in efx_fini_rx_queue()  argument
774 	struct efx_nic *efx = rx_queue->efx;  in efx_fini_rx_queue()
777 	netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,  in efx_fini_rx_queue()
778 		  "shutting down RX queue %d\n", efx_rx_queue_index(rx_queue));  in efx_fini_rx_queue()
780 	del_timer_sync(&rx_queue->slow_fill);  in efx_fini_rx_queue()
783 	if (rx_queue->buffer) {  in efx_fini_rx_queue()
784 		for (i = rx_queue->removed_count; i < rx_queue->added_count;  in efx_fini_rx_queue()
786 			unsigned index = i & rx_queue->ptr_mask;  in efx_fini_rx_queue()
787 			rx_buf = efx_rx_buffer(rx_queue, index);  in efx_fini_rx_queue()
788 			efx_fini_rx_buffer(rx_queue, rx_buf);  in efx_fini_rx_queue()
793 	for (i = 0; i <= rx_queue->page_ptr_mask; i++) {  in efx_fini_rx_queue()
794 		struct page *page = rx_queue->page_ring[i];  in efx_fini_rx_queue()
806 	kfree(rx_queue->page_ring);  in efx_fini_rx_queue()
807 	rx_queue->page_ring = NULL;  in efx_fini_rx_queue()
810 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue)  in efx_remove_rx_queue()  argument
812 	netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,  in efx_remove_rx_queue()
813 		  "destroying RX queue %d\n", efx_rx_queue_index(rx_queue));  in efx_remove_rx_queue()
815 	efx_nic_remove_rx(rx_queue);  in efx_remove_rx_queue()
817 	kfree(rx_queue->buffer);  in efx_remove_rx_queue()
818 	rx_queue->buffer = NULL;  in efx_remove_rx_queue()