17 static unsigned int efx_tx_cb_page_count(struct efx_tx_queue *tx_queue)  in efx_tx_cb_page_count()  argument
19 	return DIV_ROUND_UP(tx_queue->ptr_mask + 1,  in efx_tx_cb_page_count()
23 int efx_probe_tx_queue(struct efx_tx_queue *tx_queue)  in efx_probe_tx_queue()  argument
25 	struct efx_nic *efx = tx_queue->efx;  in efx_probe_tx_queue()
32 	tx_queue->ptr_mask = entries - 1;  in efx_probe_tx_queue()
36 		  tx_queue->queue, efx->txq_entries, tx_queue->ptr_mask);  in efx_probe_tx_queue()
39 	tx_queue->buffer = kzalloc_objs(*tx_queue->buffer, entries);  in efx_probe_tx_queue()
40 	if (!tx_queue->buffer)  in efx_probe_tx_queue()
43 	tx_queue->cb_page = kzalloc_objs(tx_queue->cb_page[0],  in efx_probe_tx_queue()
44 					 efx_tx_cb_page_count(tx_queue));  in efx_probe_tx_queue()
45 	if (!tx_queue->cb_page) {  in efx_probe_tx_queue()
51 	rc = efx_nic_probe_tx(tx_queue);  in efx_probe_tx_queue()
55 	tx_queue->channel->tx_queue_by_type[tx_queue->type] = tx_queue;  in efx_probe_tx_queue()
59 	kfree(tx_queue->cb_page);  in efx_probe_tx_queue()
60 	tx_queue->cb_page = NULL;  in efx_probe_tx_queue()
62 	kfree(tx_queue->buffer);  in efx_probe_tx_queue()
63 	tx_queue->buffer = NULL;  in efx_probe_tx_queue()
67 void efx_init_tx_queue(struct efx_tx_queue *tx_queue)  in efx_init_tx_queue()  argument
69 	struct efx_nic *efx = tx_queue->efx;  in efx_init_tx_queue()
72 		  "initialising TX queue %d\n", tx_queue->queue);  in efx_init_tx_queue()
74 	tx_queue->insert_count = 0;  in efx_init_tx_queue()
75 	tx_queue->notify_count = 0;  in efx_init_tx_queue()
76 	tx_queue->write_count = 0;  in efx_init_tx_queue()
77 	tx_queue->packet_write_count = 0;  in efx_init_tx_queue()
78 	tx_queue->old_write_count = 0;  in efx_init_tx_queue()
79 	tx_queue->read_count = 0;  in efx_init_tx_queue()
80 	tx_queue->old_read_count = 0;  in efx_init_tx_queue()
81 	tx_queue->empty_read_count = 0 | EFX_EMPTY_COUNT_VALID;  in efx_init_tx_queue()
82 	tx_queue->xmit_pending = false;  in efx_init_tx_queue()
83 	tx_queue->timestamping = (efx_ptp_use_mac_tx_timestamps(efx) &&  in efx_init_tx_queue()
84 				  tx_queue->channel == efx_ptp_channel(efx));  in efx_init_tx_queue()
85 	tx_queue->completed_timestamp_major = 0;  in efx_init_tx_queue()
86 	tx_queue->completed_timestamp_minor = 0;  in efx_init_tx_queue()
88 	tx_queue->old_complete_packets = tx_queue->complete_packets;  in efx_init_tx_queue()
89 	tx_queue->old_complete_bytes = tx_queue->complete_bytes;  in efx_init_tx_queue()
90 	tx_queue->old_tso_bursts = tx_queue->tso_bursts;  in efx_init_tx_queue()
91 	tx_queue->old_tso_packets = tx_queue->tso_packets;  in efx_init_tx_queue()
93 	tx_queue->xdp_tx = efx_channel_is_xdp_tx(tx_queue->channel);  in efx_init_tx_queue()
94 	tx_queue->tso_version = 0;  in efx_init_tx_queue()
97 	efx_nic_init_tx(tx_queue);  in efx_init_tx_queue()
99 	tx_queue->initialised = true;  in efx_init_tx_queue()
102 void efx_fini_tx_queue(struct efx_tx_queue *tx_queue)  in efx_fini_tx_queue()  argument
106 	netif_dbg(tx_queue->efx, drv, tx_queue->efx->net_dev,  in efx_fini_tx_queue()
107 		  "shutting down TX queue %d\n", tx_queue->queue);  in efx_fini_tx_queue()
109 	tx_queue->initialised = false;  in efx_fini_tx_queue()
111 	if (!tx_queue->buffer)  in efx_fini_tx_queue()
115 	while (tx_queue->read_count != tx_queue->write_count) {  in efx_fini_tx_queue()
120 		buffer = &tx_queue->buffer[tx_queue->read_count & tx_queue->ptr_mask];  in efx_fini_tx_queue()
121 		efx_dequeue_buffer(tx_queue, buffer, &pkts_compl, &bytes_compl,  in efx_fini_tx_queue()
125 		++tx_queue->read_count;  in efx_fini_tx_queue()
127 	tx_queue->xmit_pending = false;  in efx_fini_tx_queue()
128 	netdev_tx_reset_queue(tx_queue->core_txq);  in efx_fini_tx_queue()
131 void efx_remove_tx_queue(struct efx_tx_queue *tx_queue)  in efx_remove_tx_queue()  argument
135 	if (!tx_queue->buffer)  in efx_remove_tx_queue()
138 	netif_dbg(tx_queue->efx, drv, tx_queue->efx->net_dev,  in efx_remove_tx_queue()
139 		  "destroying TX queue %d\n", tx_queue->queue);  in efx_remove_tx_queue()
140 	efx_nic_remove_tx(tx_queue);  in efx_remove_tx_queue()
142 	if (tx_queue->cb_page) {  in efx_remove_tx_queue()
143 		for (i = 0; i < efx_tx_cb_page_count(tx_queue); i++)  in efx_remove_tx_queue()
144 			efx_nic_free_buffer(tx_queue->efx,  in efx_remove_tx_queue()
145 					    &tx_queue->cb_page[i]);  in efx_remove_tx_queue()
146 		kfree(tx_queue->cb_page);  in efx_remove_tx_queue()
147 		tx_queue->cb_page = NULL;  in efx_remove_tx_queue()
150 	kfree(tx_queue->buffer);  in efx_remove_tx_queue()
151 	tx_queue->buffer = NULL;  in efx_remove_tx_queue()
152 	tx_queue->channel->tx_queue_by_type[tx_queue->type] = NULL;  in efx_remove_tx_queue()
155 void efx_dequeue_buffer(struct efx_tx_queue *tx_queue,  in efx_dequeue_buffer()  argument
164 		struct device *dma_dev = &tx_queue->efx->pci_dev->dev;  in efx_dequeue_buffer()
188 		if (tx_queue->timestamping &&  in efx_dequeue_buffer()
189 		    (tx_queue->completed_timestamp_major ||  in efx_dequeue_buffer()
190 		     tx_queue->completed_timestamp_minor)) {  in efx_dequeue_buffer()
194 				efx_ptp_nic_to_kernel_time(tx_queue);  in efx_dequeue_buffer()
197 			tx_queue->completed_timestamp_major = 0;  in efx_dequeue_buffer()
198 			tx_queue->completed_timestamp_minor = 0;  in efx_dequeue_buffer()
201 		netif_vdbg(tx_queue->efx, tx_done, tx_queue->efx->net_dev,  in efx_dequeue_buffer()
203 			   tx_queue->queue, tx_queue->read_count);  in efx_dequeue_buffer()
221 static void efx_dequeue_buffers(struct efx_tx_queue *tx_queue,  in efx_dequeue_buffers()  argument
229 	struct efx_nic *efx = tx_queue->efx;  in efx_dequeue_buffers()
232 	stop_index = (index + 1) & tx_queue->ptr_mask;  in efx_dequeue_buffers()
233 	read_ptr = tx_queue->read_count & tx_queue->ptr_mask;  in efx_dequeue_buffers()
236 		struct efx_tx_buffer *buffer = &tx_queue->buffer[read_ptr];  in efx_dequeue_buffers()
241 				  tx_queue->queue, read_ptr);  in efx_dequeue_buffers()
246 		efx_dequeue_buffer(tx_queue, buffer, pkts_compl, bytes_compl,  in efx_dequeue_buffers()
249 		++tx_queue->read_count;  in efx_dequeue_buffers()
250 		read_ptr = tx_queue->read_count & tx_queue->ptr_mask;  in efx_dequeue_buffers()
254 void efx_xmit_done_check_empty(struct efx_tx_queue *tx_queue)  in efx_xmit_done_check_empty()  argument
256 	if ((int)(tx_queue->read_count - tx_queue->old_write_count) >= 0) {  in efx_xmit_done_check_empty()
257 		tx_queue->old_write_count = READ_ONCE(tx_queue->write_count);  in efx_xmit_done_check_empty()
258 		if (tx_queue->read_count == tx_queue->old_write_count) {  in efx_xmit_done_check_empty()
261 			tx_queue->empty_read_count =  in efx_xmit_done_check_empty()
262 				tx_queue->read_count | EFX_EMPTY_COUNT_VALID;  in efx_xmit_done_check_empty()
267 int efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index)  in efx_xmit_done()  argument
272 	struct efx_nic *efx = tx_queue->efx;  in efx_xmit_done()
274 	EFX_WARN_ON_ONCE_PARANOID(index > tx_queue->ptr_mask);  in efx_xmit_done()
276 	efx_dequeue_buffers(tx_queue, index, &pkts_compl, &bytes_compl,  in efx_xmit_done()
278 	tx_queue->pkts_compl += pkts_compl;  in efx_xmit_done()
279 	tx_queue->bytes_compl += bytes_compl;  in efx_xmit_done()
280 	tx_queue->complete_xdp_packets += xdp_pkts_compl;  in efx_xmit_done()
281 	tx_queue->complete_xdp_bytes += xdp_bytes_compl;  in efx_xmit_done()
284 		++tx_queue->merge_events;  in efx_xmit_done()
291 	if (unlikely(netif_tx_queue_stopped(tx_queue->core_txq)) &&  in efx_xmit_done()
294 		fill_level = efx_channel_tx_fill_level(tx_queue->channel);  in efx_xmit_done()
296 			netif_tx_wake_queue(tx_queue->core_txq);  in efx_xmit_done()
299 	efx_xmit_done_check_empty(tx_queue);  in efx_xmit_done()
307 void efx_enqueue_unwind(struct efx_tx_queue *tx_queue,  in efx_enqueue_unwind()  argument
318 	while (tx_queue->insert_count != insert_count) {  in efx_enqueue_unwind()
319 		--tx_queue->insert_count;  in efx_enqueue_unwind()
320 		buffer = __efx_tx_queue_get_insert_buffer(tx_queue);  in efx_enqueue_unwind()
321 		efx_dequeue_buffer(tx_queue, buffer, &pkts_compl, &bytes_compl,  in efx_enqueue_unwind()
327 struct efx_tx_buffer *efx_tx_map_chunk(struct efx_tx_queue *tx_queue,  in efx_tx_map_chunk()  argument
330 	const struct efx_nic_type *nic_type = tx_queue->efx->type;  in efx_tx_map_chunk()
336 		buffer = efx_tx_queue_get_insert_buffer(tx_queue);  in efx_tx_map_chunk()
339 			dma_len = nic_type->tx_limit_len(tx_queue, dma_addr, len);  in efx_tx_map_chunk()
348 		++tx_queue->insert_count;  in efx_tx_map_chunk()
368 int efx_tx_map_data(struct efx_tx_queue *tx_queue, struct sk_buff *skb,  in efx_tx_map_data()  argument
371 	struct efx_nic *efx = tx_queue->efx;  in efx_tx_map_data()
398 			tx_queue->tso_long_headers++;  in efx_tx_map_data()
399 			efx_tx_map_chunk(tx_queue, dma_addr, header_len);  in efx_tx_map_data()
410 		buffer = efx_tx_map_chunk(tx_queue, dma_addr, len);  in efx_tx_map_data()
471 int efx_tx_tso_fallback(struct efx_tx_queue *tx_queue, struct sk_buff *skb)  in efx_tx_tso_fallback()  argument
483 		efx_enqueue_skb(tx_queue, skb);  in efx_tx_tso_fallback()