79 efx_rx_buf_next(struct efx_rx_queue *rx_queue, struct efx_rx_buffer *rx_buf)  in efx_rx_buf_next()  argument
81 	if (unlikely(rx_buf == efx_rx_buffer(rx_queue, rx_queue->ptr_mask)))  in efx_rx_buf_next()
82 		return efx_rx_buffer(rx_queue, 0);  in efx_rx_buf_next()
109 static struct page *efx_reuse_page(struct efx_rx_queue *rx_queue)  in efx_reuse_page()  argument
111 	struct efx_nic *efx = rx_queue->efx;  in efx_reuse_page()
116 	index = rx_queue->page_remove & rx_queue->page_ptr_mask;  in efx_reuse_page()
117 	page = rx_queue->page_ring[index];  in efx_reuse_page()
121 	rx_queue->page_ring[index] = NULL;  in efx_reuse_page()
123 	if (rx_queue->page_remove != rx_queue->page_add)  in efx_reuse_page()
124 		++rx_queue->page_remove;  in efx_reuse_page()
128 		++rx_queue->page_recycle_count;  in efx_reuse_page()
136 		++rx_queue->page_recycle_failed;  in efx_reuse_page()
152 static int efx_init_rx_buffers(struct efx_rx_queue *rx_queue, bool atomic)  in efx_init_rx_buffers()  argument
154 	struct efx_nic *efx = rx_queue->efx;  in efx_init_rx_buffers()
164 		page = efx_reuse_page(rx_queue);  in efx_init_rx_buffers()
191 			index = rx_queue->added_count & rx_queue->ptr_mask;  in efx_init_rx_buffers()
192 			rx_buf = efx_rx_buffer(rx_queue, index);  in efx_init_rx_buffers()
198 			++rx_queue->added_count;  in efx_init_rx_buffers()
227 static void efx_free_rx_buffers(struct efx_rx_queue *rx_queue,  in efx_free_rx_buffers()  argument
236 		rx_buf = efx_rx_buf_next(rx_queue, rx_buf);  in efx_free_rx_buffers()
248 	struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);  in efx_recycle_rx_page()  local
249 	struct efx_nic *efx = rx_queue->efx;  in efx_recycle_rx_page()
256 	index = rx_queue->page_add & rx_queue->page_ptr_mask;  in efx_recycle_rx_page()
257 	if (rx_queue->page_ring[index] == NULL) {  in efx_recycle_rx_page()
258 		unsigned read_index = rx_queue->page_remove &  in efx_recycle_rx_page()
259 			rx_queue->page_ptr_mask;  in efx_recycle_rx_page()
266 			++rx_queue->page_remove;  in efx_recycle_rx_page()
267 		rx_queue->page_ring[index] = page;  in efx_recycle_rx_page()
268 		++rx_queue->page_add;  in efx_recycle_rx_page()
271 	++rx_queue->page_recycle_full;  in efx_recycle_rx_page()
276 static void efx_fini_rx_buffer(struct efx_rx_queue *rx_queue,  in efx_fini_rx_buffer()  argument
285 		efx_unmap_rx_buffer(rx_queue->efx, rx_buf);  in efx_fini_rx_buffer()
286 		efx_free_rx_buffers(rx_queue, rx_buf, 1);  in efx_fini_rx_buffer()
296 	struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);  in efx_recycle_rx_pages()  local
300 		rx_buf = efx_rx_buf_next(rx_queue, rx_buf);  in efx_recycle_rx_pages()
308 	struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);  in efx_discard_rx_packet()  local
312 	efx_free_rx_buffers(rx_queue, rx_buf, n_frags);  in efx_discard_rx_packet()
327 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic)  in efx_fast_push_rx_descriptors()  argument
329 	struct efx_nic *efx = rx_queue->efx;  in efx_fast_push_rx_descriptors()
333 	if (!rx_queue->refill_enabled)  in efx_fast_push_rx_descriptors()
337 	fill_level = (rx_queue->added_count - rx_queue->removed_count);  in efx_fast_push_rx_descriptors()
338 	EFX_WARN_ON_ONCE_PARANOID(fill_level > rx_queue->efx->rxq_entries);  in efx_fast_push_rx_descriptors()
339 	if (fill_level >= rx_queue->fast_fill_trigger)  in efx_fast_push_rx_descriptors()
343 	if (unlikely(fill_level < rx_queue->min_fill)) {  in efx_fast_push_rx_descriptors()
345 			rx_queue->min_fill = fill_level;  in efx_fast_push_rx_descriptors()
349 	space = rx_queue->max_fill - fill_level;  in efx_fast_push_rx_descriptors()
352 	netif_vdbg(rx_queue->efx, rx_status, rx_queue->efx->net_dev,  in efx_fast_push_rx_descriptors()
355 		   efx_rx_queue_index(rx_queue), fill_level,  in efx_fast_push_rx_descriptors()
356 		   rx_queue->max_fill);  in efx_fast_push_rx_descriptors()
360 		rc = efx_init_rx_buffers(rx_queue, atomic);  in efx_fast_push_rx_descriptors()
363 			if (rx_queue->added_count == rx_queue->removed_count)  in efx_fast_push_rx_descriptors()
364 				efx_schedule_slow_fill(rx_queue);  in efx_fast_push_rx_descriptors()
369 	netif_vdbg(rx_queue->efx, rx_status, rx_queue->efx->net_dev,  in efx_fast_push_rx_descriptors()
371 		   "to level %d\n", efx_rx_queue_index(rx_queue),  in efx_fast_push_rx_descriptors()
372 		   rx_queue->added_count - rx_queue->removed_count);  in efx_fast_push_rx_descriptors()
375 	if (rx_queue->notified_count != rx_queue->added_count)  in efx_fast_push_rx_descriptors()
376 		efx_nic_notify_rx_desc(rx_queue);  in efx_fast_push_rx_descriptors()
381 	struct efx_rx_queue *rx_queue = from_timer(rx_queue, t, slow_fill);  in efx_rx_slow_fill()  local
384 	efx_nic_generate_fill_event(rx_queue);  in efx_rx_slow_fill()
385 	++rx_queue->slow_fill_count;  in efx_rx_slow_fill()
388 static void efx_rx_packet__check_len(struct efx_rx_queue *rx_queue,  in efx_rx_packet__check_len()  argument
392 	struct efx_nic *efx = rx_queue->efx;  in efx_rx_packet__check_len()
406 			  efx_rx_queue_index(rx_queue), len, max_len);  in efx_rx_packet__check_len()
408 	efx_rx_queue_channel(rx_queue)->n_rx_overlength++;  in efx_rx_packet__check_len()
425 		struct efx_rx_queue *rx_queue;  in efx_rx_packet_gro()  local
427 		rx_queue = efx_channel_get_rx_queue(channel);  in efx_rx_packet_gro()
428 		efx_free_rx_buffers(rx_queue, rx_buf, n_frags);  in efx_rx_packet_gro()
448 		rx_buf = efx_rx_buf_next(&channel->rx_queue, rx_buf);  in efx_rx_packet_gro()
454 	skb_record_rx_queue(skb, channel->rx_queue.core_index);  in efx_rx_packet_gro()
501 			rx_buf = efx_rx_buf_next(&channel->rx_queue, rx_buf);  in efx_rx_mk_skb()
519 void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,  in efx_rx_packet()  argument
522 	struct efx_nic *efx = rx_queue->efx;  in efx_rx_packet()
523 	struct efx_channel *channel = efx_rx_queue_channel(rx_queue);  in efx_rx_packet()
526 	rx_queue->rx_packets++;  in efx_rx_packet()
528 	rx_buf = efx_rx_buffer(rx_queue, index);  in efx_rx_packet()
534 			efx_rx_packet__check_len(rx_queue, rx_buf, len);  in efx_rx_packet()
548 		   efx_rx_queue_index(rx_queue), index,  in efx_rx_packet()
549 		   (index + n_frags - 1) & rx_queue->ptr_mask, len,  in efx_rx_packet()
585 			rx_buf = efx_rx_buf_next(rx_queue, rx_buf);  in efx_rx_packet()
595 	rx_buf = efx_rx_buffer(rx_queue, index);  in efx_rx_packet()
615 		struct efx_rx_queue *rx_queue;  in efx_rx_deliver()  local
617 		rx_queue = efx_channel_get_rx_queue(channel);  in efx_rx_deliver()
618 		efx_free_rx_buffers(rx_queue, rx_buf, n_frags);  in efx_rx_deliver()
621 	skb_record_rx_queue(skb, channel->rx_queue.core_index);  in efx_rx_deliver()
650 		efx_rx_buffer(&channel->rx_queue, channel->rx_pkt_index);  in __efx_rx_packet()
664 		struct efx_rx_queue *rx_queue;  in __efx_rx_packet()  local
667 		rx_queue = efx_channel_get_rx_queue(channel);  in __efx_rx_packet()
668 		efx_free_rx_buffers(rx_queue, rx_buf,  in __efx_rx_packet()
684 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue)  in efx_probe_rx_queue()  argument
686 	struct efx_nic *efx = rx_queue->efx;  in efx_probe_rx_queue()
693 	rx_queue->ptr_mask = entries - 1;  in efx_probe_rx_queue()
697 		  efx_rx_queue_index(rx_queue), efx->rxq_entries,  in efx_probe_rx_queue()
698 		  rx_queue->ptr_mask);  in efx_probe_rx_queue()
701 	rx_queue->buffer = kcalloc(entries, sizeof(*rx_queue->buffer),  in efx_probe_rx_queue()
703 	if (!rx_queue->buffer)  in efx_probe_rx_queue()
706 	rc = efx_nic_probe_rx(rx_queue);  in efx_probe_rx_queue()
708 		kfree(rx_queue->buffer);  in efx_probe_rx_queue()
709 		rx_queue->buffer = NULL;  in efx_probe_rx_queue()
716 				     struct efx_rx_queue *rx_queue)  in efx_init_rx_recycle_ring()  argument
732 	rx_queue->page_ring = kcalloc(page_ring_size,  in efx_init_rx_recycle_ring()
733 				      sizeof(*rx_queue->page_ring), GFP_KERNEL);  in efx_init_rx_recycle_ring()
734 	rx_queue->page_ptr_mask = page_ring_size - 1;  in efx_init_rx_recycle_ring()
737 void efx_init_rx_queue(struct efx_rx_queue *rx_queue)  in efx_init_rx_queue()  argument
739 	struct efx_nic *efx = rx_queue->efx;  in efx_init_rx_queue()
742 	netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,  in efx_init_rx_queue()
743 		  "initialising RX queue %d\n", efx_rx_queue_index(rx_queue));  in efx_init_rx_queue()
746 	rx_queue->added_count = 0;  in efx_init_rx_queue()
747 	rx_queue->notified_count = 0;  in efx_init_rx_queue()
748 	rx_queue->removed_count = 0;  in efx_init_rx_queue()
749 	rx_queue->min_fill = -1U;  in efx_init_rx_queue()
750 	efx_init_rx_recycle_ring(efx, rx_queue);  in efx_init_rx_queue()
752 	rx_queue->page_remove = 0;  in efx_init_rx_queue()
753 	rx_queue->page_add = rx_queue->page_ptr_mask + 1;  in efx_init_rx_queue()
754 	rx_queue->page_recycle_count = 0;  in efx_init_rx_queue()
755 	rx_queue->page_recycle_failed = 0;  in efx_init_rx_queue()
756 	rx_queue->page_recycle_full = 0;  in efx_init_rx_queue()
770 	rx_queue->max_fill = max_fill;  in efx_init_rx_queue()
771 	rx_queue->fast_fill_trigger = trigger;  in efx_init_rx_queue()
772 	rx_queue->refill_enabled = true;  in efx_init_rx_queue()
775 	efx_nic_init_rx(rx_queue);  in efx_init_rx_queue()
778 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue)  in efx_fini_rx_queue()  argument
781 	struct efx_nic *efx = rx_queue->efx;  in efx_fini_rx_queue()
784 	netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,  in efx_fini_rx_queue()
785 		  "shutting down RX queue %d\n", efx_rx_queue_index(rx_queue));  in efx_fini_rx_queue()
787 	del_timer_sync(&rx_queue->slow_fill);  in efx_fini_rx_queue()
790 	if (rx_queue->buffer) {  in efx_fini_rx_queue()
791 		for (i = rx_queue->removed_count; i < rx_queue->added_count;  in efx_fini_rx_queue()
793 			unsigned index = i & rx_queue->ptr_mask;  in efx_fini_rx_queue()
794 			rx_buf = efx_rx_buffer(rx_queue, index);  in efx_fini_rx_queue()
795 			efx_fini_rx_buffer(rx_queue, rx_buf);  in efx_fini_rx_queue()
800 	for (i = 0; i <= rx_queue->page_ptr_mask; i++) {  in efx_fini_rx_queue()
801 		struct page *page = rx_queue->page_ring[i];  in efx_fini_rx_queue()
813 	kfree(rx_queue->page_ring);  in efx_fini_rx_queue()
814 	rx_queue->page_ring = NULL;  in efx_fini_rx_queue()
817 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue)  in efx_remove_rx_queue()  argument
819 	netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,  in efx_remove_rx_queue()
820 		  "destroying RX queue %d\n", efx_rx_queue_index(rx_queue));  in efx_remove_rx_queue()
822 	efx_nic_remove_rx(rx_queue);  in efx_remove_rx_queue()
824 	kfree(rx_queue->buffer);  in efx_remove_rx_queue()
825 	rx_queue->buffer = NULL;  in efx_remove_rx_queue()