79 ef4_rx_buf_next(struct ef4_rx_queue *rx_queue, struct ef4_rx_buffer *rx_buf)  in ef4_rx_buf_next()  argument
81 	if (unlikely(rx_buf == ef4_rx_buffer(rx_queue, rx_queue->ptr_mask)))  in ef4_rx_buf_next()
82 		return ef4_rx_buffer(rx_queue, 0);  in ef4_rx_buf_next()
109 static struct page *ef4_reuse_page(struct ef4_rx_queue *rx_queue)  in ef4_reuse_page()  argument
111 	struct ef4_nic *efx = rx_queue->efx;  in ef4_reuse_page()
116 	index = rx_queue->page_remove & rx_queue->page_ptr_mask;  in ef4_reuse_page()
117 	page = rx_queue->page_ring[index];  in ef4_reuse_page()
121 	rx_queue->page_ring[index] = NULL;  in ef4_reuse_page()
123 	if (rx_queue->page_remove != rx_queue->page_add)  in ef4_reuse_page()
124 		++rx_queue->page_remove;  in ef4_reuse_page()
128 		++rx_queue->page_recycle_count;  in ef4_reuse_page()
136 		++rx_queue->page_recycle_failed;  in ef4_reuse_page()
152 static int ef4_init_rx_buffers(struct ef4_rx_queue *rx_queue, bool atomic)  in ef4_init_rx_buffers()  argument
154 	struct ef4_nic *efx = rx_queue->efx;  in ef4_init_rx_buffers()
164 		page = ef4_reuse_page(rx_queue);  in ef4_init_rx_buffers()
191 			index = rx_queue->added_count & rx_queue->ptr_mask;  in ef4_init_rx_buffers()
192 			rx_buf = ef4_rx_buffer(rx_queue, index);  in ef4_init_rx_buffers()
198 			++rx_queue->added_count;  in ef4_init_rx_buffers()
227 static void ef4_free_rx_buffers(struct ef4_rx_queue *rx_queue,  in ef4_free_rx_buffers()  argument
236 		rx_buf = ef4_rx_buf_next(rx_queue, rx_buf);  in ef4_free_rx_buffers()
248 	struct ef4_rx_queue *rx_queue = ef4_channel_get_rx_queue(channel);  in ef4_recycle_rx_page()  local
249 	struct ef4_nic *efx = rx_queue->efx;  in ef4_recycle_rx_page()
256 	index = rx_queue->page_add & rx_queue->page_ptr_mask;  in ef4_recycle_rx_page()
257 	if (rx_queue->page_ring[index] == NULL) {  in ef4_recycle_rx_page()
258 		unsigned read_index = rx_queue->page_remove &  in ef4_recycle_rx_page()
259 			rx_queue->page_ptr_mask;  in ef4_recycle_rx_page()
266 			++rx_queue->page_remove;  in ef4_recycle_rx_page()
267 		rx_queue->page_ring[index] = page;  in ef4_recycle_rx_page()
268 		++rx_queue->page_add;  in ef4_recycle_rx_page()
271 	++rx_queue->page_recycle_full;  in ef4_recycle_rx_page()
276 static void ef4_fini_rx_buffer(struct ef4_rx_queue *rx_queue,  in ef4_fini_rx_buffer()  argument
285 		ef4_unmap_rx_buffer(rx_queue->efx, rx_buf);  in ef4_fini_rx_buffer()
286 		ef4_free_rx_buffers(rx_queue, rx_buf, 1);  in ef4_fini_rx_buffer()
296 	struct ef4_rx_queue *rx_queue = ef4_channel_get_rx_queue(channel);  in ef4_recycle_rx_pages()  local
300 		rx_buf = ef4_rx_buf_next(rx_queue, rx_buf);  in ef4_recycle_rx_pages()
308 	struct ef4_rx_queue *rx_queue = ef4_channel_get_rx_queue(channel);  in ef4_discard_rx_packet()  local
312 	ef4_free_rx_buffers(rx_queue, rx_buf, n_frags);  in ef4_discard_rx_packet()
327 void ef4_fast_push_rx_descriptors(struct ef4_rx_queue *rx_queue, bool atomic)  in ef4_fast_push_rx_descriptors()  argument
329 	struct ef4_nic *efx = rx_queue->efx;  in ef4_fast_push_rx_descriptors()
333 	if (!rx_queue->refill_enabled)  in ef4_fast_push_rx_descriptors()
337 	fill_level = (rx_queue->added_count - rx_queue->removed_count);  in ef4_fast_push_rx_descriptors()
338 	EF4_BUG_ON_PARANOID(fill_level > rx_queue->efx->rxq_entries);  in ef4_fast_push_rx_descriptors()
339 	if (fill_level >= rx_queue->fast_fill_trigger)  in ef4_fast_push_rx_descriptors()
343 	if (unlikely(fill_level < rx_queue->min_fill)) {  in ef4_fast_push_rx_descriptors()
345 			rx_queue->min_fill = fill_level;  in ef4_fast_push_rx_descriptors()
349 	space = rx_queue->max_fill - fill_level;  in ef4_fast_push_rx_descriptors()
352 	netif_vdbg(rx_queue->efx, rx_status, rx_queue->efx->net_dev,  in ef4_fast_push_rx_descriptors()
355 		   ef4_rx_queue_index(rx_queue), fill_level,  in ef4_fast_push_rx_descriptors()
356 		   rx_queue->max_fill);  in ef4_fast_push_rx_descriptors()
360 		rc = ef4_init_rx_buffers(rx_queue, atomic);  in ef4_fast_push_rx_descriptors()
363 			if (rx_queue->added_count == rx_queue->removed_count)  in ef4_fast_push_rx_descriptors()
364 				ef4_schedule_slow_fill(rx_queue);  in ef4_fast_push_rx_descriptors()
369 	netif_vdbg(rx_queue->efx, rx_status, rx_queue->efx->net_dev,  in ef4_fast_push_rx_descriptors()
371 		   "to level %d\n", ef4_rx_queue_index(rx_queue),  in ef4_fast_push_rx_descriptors()
372 		   rx_queue->added_count - rx_queue->removed_count);  in ef4_fast_push_rx_descriptors()
375 	if (rx_queue->notified_count != rx_queue->added_count)  in ef4_fast_push_rx_descriptors()
376 		ef4_nic_notify_rx_desc(rx_queue);  in ef4_fast_push_rx_descriptors()
381 	struct ef4_rx_queue *rx_queue = from_timer(rx_queue, t, slow_fill);  in ef4_rx_slow_fill()  local
384 	ef4_nic_generate_fill_event(rx_queue);  in ef4_rx_slow_fill()
385 	++rx_queue->slow_fill_count;  in ef4_rx_slow_fill()
388 static void ef4_rx_packet__check_len(struct ef4_rx_queue *rx_queue,  in ef4_rx_packet__check_len()  argument
392 	struct ef4_nic *efx = rx_queue->efx;  in ef4_rx_packet__check_len()
408 				  ef4_rx_queue_index(rx_queue), len, max_len,  in ef4_rx_packet__check_len()
416 				  ef4_rx_queue_index(rx_queue), len, max_len);  in ef4_rx_packet__check_len()
419 	ef4_rx_queue_channel(rx_queue)->n_rx_overlength++;  in ef4_rx_packet__check_len()
436 		struct ef4_rx_queue *rx_queue;  in ef4_rx_packet_gro()  local
438 		rx_queue = ef4_channel_get_rx_queue(channel);  in ef4_rx_packet_gro()
439 		ef4_free_rx_buffers(rx_queue, rx_buf, n_frags);  in ef4_rx_packet_gro()
458 		rx_buf = ef4_rx_buf_next(&channel->rx_queue, rx_buf);  in ef4_rx_packet_gro()
464 	skb_record_rx_queue(skb, channel->rx_queue.core_index);  in ef4_rx_packet_gro()
511 			rx_buf = ef4_rx_buf_next(&channel->rx_queue, rx_buf);  in ef4_rx_mk_skb()
529 void ef4_rx_packet(struct ef4_rx_queue *rx_queue, unsigned int index,  in ef4_rx_packet()  argument
532 	struct ef4_nic *efx = rx_queue->efx;  in ef4_rx_packet()
533 	struct ef4_channel *channel = ef4_rx_queue_channel(rx_queue);  in ef4_rx_packet()
536 	rx_queue->rx_packets++;  in ef4_rx_packet()
538 	rx_buf = ef4_rx_buffer(rx_queue, index);  in ef4_rx_packet()
544 			ef4_rx_packet__check_len(rx_queue, rx_buf, len);  in ef4_rx_packet()
558 		   ef4_rx_queue_index(rx_queue), index,  in ef4_rx_packet()
559 		   (index + n_frags - 1) & rx_queue->ptr_mask, len,  in ef4_rx_packet()
595 			rx_buf = ef4_rx_buf_next(rx_queue, rx_buf);  in ef4_rx_packet()
605 	rx_buf = ef4_rx_buffer(rx_queue, index);  in ef4_rx_packet()
625 		struct ef4_rx_queue *rx_queue;  in ef4_rx_deliver()  local
627 		rx_queue = ef4_channel_get_rx_queue(channel);  in ef4_rx_deliver()
628 		ef4_free_rx_buffers(rx_queue, rx_buf, n_frags);  in ef4_rx_deliver()
631 	skb_record_rx_queue(skb, channel->rx_queue.core_index);  in ef4_rx_deliver()
651 		ef4_rx_buffer(&channel->rx_queue, channel->rx_pkt_index);  in __ef4_rx_packet()
665 		struct ef4_rx_queue *rx_queue;  in __ef4_rx_packet()  local
668 		rx_queue = ef4_channel_get_rx_queue(channel);  in __ef4_rx_packet()
669 		ef4_free_rx_buffers(rx_queue, rx_buf,  in __ef4_rx_packet()
685 int ef4_probe_rx_queue(struct ef4_rx_queue *rx_queue)  in ef4_probe_rx_queue()  argument
687 	struct ef4_nic *efx = rx_queue->efx;  in ef4_probe_rx_queue()
694 	rx_queue->ptr_mask = entries - 1;  in ef4_probe_rx_queue()
698 		  ef4_rx_queue_index(rx_queue), efx->rxq_entries,  in ef4_probe_rx_queue()
699 		  rx_queue->ptr_mask);  in ef4_probe_rx_queue()
702 	rx_queue->buffer = kcalloc(entries, sizeof(*rx_queue->buffer),  in ef4_probe_rx_queue()
704 	if (!rx_queue->buffer)  in ef4_probe_rx_queue()
707 	rc = ef4_nic_probe_rx(rx_queue);  in ef4_probe_rx_queue()
709 		kfree(rx_queue->buffer);  in ef4_probe_rx_queue()
710 		rx_queue->buffer = NULL;  in ef4_probe_rx_queue()
717 				     struct ef4_rx_queue *rx_queue)  in ef4_init_rx_recycle_ring()  argument
733 	rx_queue->page_ring = kcalloc(page_ring_size,  in ef4_init_rx_recycle_ring()
734 				      sizeof(*rx_queue->page_ring), GFP_KERNEL);  in ef4_init_rx_recycle_ring()
735 	rx_queue->page_ptr_mask = page_ring_size - 1;  in ef4_init_rx_recycle_ring()
738 void ef4_init_rx_queue(struct ef4_rx_queue *rx_queue)  in ef4_init_rx_queue()  argument
740 	struct ef4_nic *efx = rx_queue->efx;  in ef4_init_rx_queue()
743 	netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,  in ef4_init_rx_queue()
744 		  "initialising RX queue %d\n", ef4_rx_queue_index(rx_queue));  in ef4_init_rx_queue()
747 	rx_queue->added_count = 0;  in ef4_init_rx_queue()
748 	rx_queue->notified_count = 0;  in ef4_init_rx_queue()
749 	rx_queue->removed_count = 0;  in ef4_init_rx_queue()
750 	rx_queue->min_fill = -1U;  in ef4_init_rx_queue()
751 	ef4_init_rx_recycle_ring(efx, rx_queue);  in ef4_init_rx_queue()
753 	rx_queue->page_remove = 0;  in ef4_init_rx_queue()
754 	rx_queue->page_add = rx_queue->page_ptr_mask + 1;  in ef4_init_rx_queue()
755 	rx_queue->page_recycle_count = 0;  in ef4_init_rx_queue()
756 	rx_queue->page_recycle_failed = 0;  in ef4_init_rx_queue()
757 	rx_queue->page_recycle_full = 0;  in ef4_init_rx_queue()
771 	rx_queue->max_fill = max_fill;  in ef4_init_rx_queue()
772 	rx_queue->fast_fill_trigger = trigger;  in ef4_init_rx_queue()
773 	rx_queue->refill_enabled = true;  in ef4_init_rx_queue()
776 	ef4_nic_init_rx(rx_queue);  in ef4_init_rx_queue()
779 void ef4_fini_rx_queue(struct ef4_rx_queue *rx_queue)  in ef4_fini_rx_queue()  argument
782 	struct ef4_nic *efx = rx_queue->efx;  in ef4_fini_rx_queue()
785 	netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,  in ef4_fini_rx_queue()
786 		  "shutting down RX queue %d\n", ef4_rx_queue_index(rx_queue));  in ef4_fini_rx_queue()
788 	del_timer_sync(&rx_queue->slow_fill);  in ef4_fini_rx_queue()
791 	if (rx_queue->buffer) {  in ef4_fini_rx_queue()
792 		for (i = rx_queue->removed_count; i < rx_queue->added_count;  in ef4_fini_rx_queue()
794 			unsigned index = i & rx_queue->ptr_mask;  in ef4_fini_rx_queue()
795 			rx_buf = ef4_rx_buffer(rx_queue, index);  in ef4_fini_rx_queue()
796 			ef4_fini_rx_buffer(rx_queue, rx_buf);  in ef4_fini_rx_queue()
801 	for (i = 0; i <= rx_queue->page_ptr_mask; i++) {  in ef4_fini_rx_queue()
802 		struct page *page = rx_queue->page_ring[i];  in ef4_fini_rx_queue()
814 	kfree(rx_queue->page_ring);  in ef4_fini_rx_queue()
815 	rx_queue->page_ring = NULL;  in ef4_fini_rx_queue()
818 void ef4_remove_rx_queue(struct ef4_rx_queue *rx_queue)  in ef4_remove_rx_queue()  argument
820 	netif_dbg(rx_queue->efx, drv, rx_queue->efx->net_dev,  in ef4_remove_rx_queue()
821 		  "destroying RX queue %d\n", ef4_rx_queue_index(rx_queue));  in ef4_remove_rx_queue()
823 	ef4_nic_remove_rx(rx_queue);  in ef4_remove_rx_queue()
825 	kfree(rx_queue->buffer);  in ef4_remove_rx_queue()
826 	rx_queue->buffer = NULL;  in ef4_remove_rx_queue()