1	// SPDX-License-Identifier: GPL-2.0
2	/* Copyright(c) 2013 - 2019 Intel Corporation. */
3
4	#include "fm10k.h"
5	#include <linux/vmalloc.h>
6	#include <net/udp_tunnel.h>
7	#include <linux/if_macvlan.h>
8
9	/**
10	* fm10k_setup_tx_resources - allocate Tx resources (Descriptors)
11	* @tx_ring: tx descriptor ring (for a specific queue) to setup
12	*
13	* Return 0 on success, negative on failure
14	**/
15	int fm10k_setup_tx_resources(struct fm10k_ring *tx_ring)
16	{
17	struct device *dev = tx_ring->dev;
18	int size;
19
20	size = sizeof(struct fm10k_tx_buffer) * tx_ring->count;
21
22	tx_ring->tx_buffer = vzalloc(size);
23	if (!tx_ring->tx_buffer)
24	goto err;
25
26	u64_stats_init(syncp: &tx_ring->syncp);
27
28	/* round up to nearest 4K */
29	tx_ring->size = tx_ring->count * sizeof(struct fm10k_tx_desc);
30	tx_ring->size = ALIGN(tx_ring->size, 4096);
31
32	tx_ring->desc = dma_alloc_coherent(dev, size: tx_ring->size,
33	dma_handle: &tx_ring->dma, GFP_KERNEL);
34	if (!tx_ring->desc)
35	goto err;
36
37	return 0;
38
39	err:
40	vfree(addr: tx_ring->tx_buffer);
41	tx_ring->tx_buffer = NULL;
42	return -ENOMEM;
43	}
44
45	/**
46	* fm10k_setup_all_tx_resources - allocate all queues Tx resources
47	* @interface: board private structure
48	*
49	* If this function returns with an error, then it's possible one or
50	* more of the rings is populated (while the rest are not). It is the
51	* callers duty to clean those orphaned rings.
52	*
53	* Return 0 on success, negative on failure
54	**/
55	static int fm10k_setup_all_tx_resources(struct fm10k_intfc *interface)
56	{
57	int i, err;
58
59	for (i = 0; i < interface->num_tx_queues; i++) {
60	err = fm10k_setup_tx_resources(tx_ring: interface->tx_ring[i]);
61	if (!err)
62	continue;
63
64	netif_err(interface, probe, interface->netdev,
65	"Allocation for Tx Queue %u failed\n", i);
66	goto err_setup_tx;
67	}
68
69	return 0;
70	err_setup_tx:
71	/* rewind the index freeing the rings as we go */
72	while (i--)
73	fm10k_free_tx_resources(interface->tx_ring[i]);
74	return err;
75	}
76
77	/**
78	* fm10k_setup_rx_resources - allocate Rx resources (Descriptors)
79	* @rx_ring: rx descriptor ring (for a specific queue) to setup
80	*
81	* Returns 0 on success, negative on failure
82	**/
83	int fm10k_setup_rx_resources(struct fm10k_ring *rx_ring)
84	{
85	struct device *dev = rx_ring->dev;
86	int size;
87
88	size = sizeof(struct fm10k_rx_buffer) * rx_ring->count;
89
90	rx_ring->rx_buffer = vzalloc(size);
91	if (!rx_ring->rx_buffer)
92	goto err;
93
94	u64_stats_init(syncp: &rx_ring->syncp);
95
96	/* Round up to nearest 4K */
97	rx_ring->size = rx_ring->count * sizeof(union fm10k_rx_desc);
98	rx_ring->size = ALIGN(rx_ring->size, 4096);
99
100	rx_ring->desc = dma_alloc_coherent(dev, size: rx_ring->size,
101	dma_handle: &rx_ring->dma, GFP_KERNEL);
102	if (!rx_ring->desc)
103	goto err;
104
105	return 0;
106	err:
107	vfree(addr: rx_ring->rx_buffer);
108	rx_ring->rx_buffer = NULL;
109	return -ENOMEM;
110	}
111
112	/**
113	* fm10k_setup_all_rx_resources - allocate all queues Rx resources
114	* @interface: board private structure
115	*
116	* If this function returns with an error, then it's possible one or
117	* more of the rings is populated (while the rest are not). It is the
118	* callers duty to clean those orphaned rings.
119	*
120	* Return 0 on success, negative on failure
121	**/
122	static int fm10k_setup_all_rx_resources(struct fm10k_intfc *interface)
123	{
124	int i, err;
125
126	for (i = 0; i < interface->num_rx_queues; i++) {
127	err = fm10k_setup_rx_resources(rx_ring: interface->rx_ring[i]);
128	if (!err)
129	continue;
130
131	netif_err(interface, probe, interface->netdev,
132	"Allocation for Rx Queue %u failed\n", i);
133	goto err_setup_rx;
134	}
135
136	return 0;
137	err_setup_rx:
138	/* rewind the index freeing the rings as we go */
139	while (i--)
140	fm10k_free_rx_resources(interface->rx_ring[i]);
141	return err;
142	}
143
144	void fm10k_unmap_and_free_tx_resource(struct fm10k_ring *ring,
145	struct fm10k_tx_buffer *tx_buffer)
146	{
147	if (tx_buffer->skb) {
148	dev_kfree_skb_any(skb: tx_buffer->skb);
149	if (dma_unmap_len(tx_buffer, len))
150	dma_unmap_single(ring->dev,
151	dma_unmap_addr(tx_buffer, dma),
152	dma_unmap_len(tx_buffer, len),
153	DMA_TO_DEVICE);
154	} else if (dma_unmap_len(tx_buffer, len)) {
155	dma_unmap_page(ring->dev,
156	dma_unmap_addr(tx_buffer, dma),
157	dma_unmap_len(tx_buffer, len),
158	DMA_TO_DEVICE);
159	}
160	tx_buffer->next_to_watch = NULL;
161	tx_buffer->skb = NULL;
162	dma_unmap_len_set(tx_buffer, len, 0);
163	/* tx_buffer must be completely set up in the transmit path */
164	}
165
166	/**
167	* fm10k_clean_tx_ring - Free Tx Buffers
168	* @tx_ring: ring to be cleaned
169	**/
170	static void fm10k_clean_tx_ring(struct fm10k_ring *tx_ring)
171	{
172	unsigned long size;
173	u16 i;
174
175	/* ring already cleared, nothing to do */
176	if (!tx_ring->tx_buffer)
177	return;
178
179	/* Free all the Tx ring sk_buffs */
180	for (i = 0; i < tx_ring->count; i++) {
181	struct fm10k_tx_buffer *tx_buffer = &tx_ring->tx_buffer[i];
182
183	fm10k_unmap_and_free_tx_resource(ring: tx_ring, tx_buffer);
184	}
185
186	/* reset BQL values */
187	netdev_tx_reset_queue(q: txring_txq(ring: tx_ring));
188
189	size = sizeof(struct fm10k_tx_buffer) * tx_ring->count;
190	memset(tx_ring->tx_buffer, 0, size);
191
192	/* Zero out the descriptor ring */
193	memset(tx_ring->desc, 0, tx_ring->size);
194	}
195
196	/**
197	* fm10k_free_tx_resources - Free Tx Resources per Queue
198	* @tx_ring: Tx descriptor ring for a specific queue
199	*
200	* Free all transmit software resources
201	**/
202	void fm10k_free_tx_resources(struct fm10k_ring *tx_ring)
203	{
204	fm10k_clean_tx_ring(tx_ring);
205
206	vfree(addr: tx_ring->tx_buffer);
207	tx_ring->tx_buffer = NULL;
208
209	/* if not set, then don't free */
210	if (!tx_ring->desc)
211	return;
212
213	dma_free_coherent(dev: tx_ring->dev, size: tx_ring->size,
214	cpu_addr: tx_ring->desc, dma_handle: tx_ring->dma);
215	tx_ring->desc = NULL;
216	}
217
218	/**
219	* fm10k_clean_all_tx_rings - Free Tx Buffers for all queues
220	* @interface: board private structure
221	**/
222	void fm10k_clean_all_tx_rings(struct fm10k_intfc *interface)
223	{
224	int i;
225
226	for (i = 0; i < interface->num_tx_queues; i++)
227	fm10k_clean_tx_ring(tx_ring: interface->tx_ring[i]);
228	}
229
230	/**
231	* fm10k_free_all_tx_resources - Free Tx Resources for All Queues
232	* @interface: board private structure
233	*
234	* Free all transmit software resources
235	**/
236	static void fm10k_free_all_tx_resources(struct fm10k_intfc *interface)
237	{
238	int i = interface->num_tx_queues;
239
240	while (i--)
241	fm10k_free_tx_resources(tx_ring: interface->tx_ring[i]);
242	}
243
244	/**
245	* fm10k_clean_rx_ring - Free Rx Buffers per Queue
246	* @rx_ring: ring to free buffers from
247	**/
248	static void fm10k_clean_rx_ring(struct fm10k_ring *rx_ring)
249	{
250	unsigned long size;
251	u16 i;
252
253	if (!rx_ring->rx_buffer)
254	return;
255
256	dev_kfree_skb(rx_ring->skb);
257	rx_ring->skb = NULL;
258
259	/* Free all the Rx ring sk_buffs */
260	for (i = 0; i < rx_ring->count; i++) {
261	struct fm10k_rx_buffer *buffer = &rx_ring->rx_buffer[i];
262	/* clean-up will only set page pointer to NULL */
263	if (!buffer->page)
264	continue;
265
266	dma_unmap_page(rx_ring->dev, buffer->dma,
267	PAGE_SIZE, DMA_FROM_DEVICE);
268	__free_page(buffer->page);
269
270	buffer->page = NULL;
271	}
272
273	size = sizeof(struct fm10k_rx_buffer) * rx_ring->count;
274	memset(rx_ring->rx_buffer, 0, size);
275
276	/* Zero out the descriptor ring */
277	memset(rx_ring->desc, 0, rx_ring->size);
278
279	rx_ring->next_to_alloc = 0;
280	rx_ring->next_to_clean = 0;
281	rx_ring->next_to_use = 0;
282	}
283
284	/**
285	* fm10k_free_rx_resources - Free Rx Resources
286	* @rx_ring: ring to clean the resources from
287	*
288	* Free all receive software resources
289	**/
290	void fm10k_free_rx_resources(struct fm10k_ring *rx_ring)
291	{
292	fm10k_clean_rx_ring(rx_ring);
293
294	vfree(addr: rx_ring->rx_buffer);
295	rx_ring->rx_buffer = NULL;
296
297	/* if not set, then don't free */
298	if (!rx_ring->desc)
299	return;
300
301	dma_free_coherent(dev: rx_ring->dev, size: rx_ring->size,
302	cpu_addr: rx_ring->desc, dma_handle: rx_ring->dma);
303
304	rx_ring->desc = NULL;
305	}
306
307	/**
308	* fm10k_clean_all_rx_rings - Free Rx Buffers for all queues
309	* @interface: board private structure
310	**/
311	void fm10k_clean_all_rx_rings(struct fm10k_intfc *interface)
312	{
313	int i;
314
315	for (i = 0; i < interface->num_rx_queues; i++)
316	fm10k_clean_rx_ring(rx_ring: interface->rx_ring[i]);
317	}
318
319	/**
320	* fm10k_free_all_rx_resources - Free Rx Resources for All Queues
321	* @interface: board private structure
322	*
323	* Free all receive software resources
324	**/
325	static void fm10k_free_all_rx_resources(struct fm10k_intfc *interface)
326	{
327	int i = interface->num_rx_queues;
328
329	while (i--)
330	fm10k_free_rx_resources(rx_ring: interface->rx_ring[i]);
331	}
332
333	/**
334	* fm10k_request_glort_range - Request GLORTs for use in configuring rules
335	* @interface: board private structure
336	*
337	* This function allocates a range of glorts for this interface to use.
338	**/
339	static void fm10k_request_glort_range(struct fm10k_intfc *interface)
340	{
341	struct fm10k_hw *hw = &interface->hw;
342	u16 mask = (~hw->mac.dglort_map) >> FM10K_DGLORTMAP_MASK_SHIFT;
343
344	/* establish GLORT base */
345	interface->glort = hw->mac.dglort_map & FM10K_DGLORTMAP_NONE;
346	interface->glort_count = 0;
347
348	/* nothing we can do until mask is allocated */
349	if (hw->mac.dglort_map == FM10K_DGLORTMAP_NONE)
350	return;
351
352	/* we support 3 possible GLORT configurations.
353	* 1: VFs consume all but the last 1
354	* 2: VFs and PF split glorts with possible gap between
355	* 3: VFs allocated first 64, all others belong to PF
356	*/
357	if (mask <= hw->iov.total_vfs) {
358	interface->glort_count = 1;
359	interface->glort += mask;
360	} else if (mask < 64) {
361	interface->glort_count = (mask + 1) / 2;
362	interface->glort += interface->glort_count;
363	} else {
364	interface->glort_count = mask - 63;
365	interface->glort += 64;
366	}
367	}
368
369	/**
370	* fm10k_restore_udp_port_info
371	* @interface: board private structure
372	*
373	* This function restores the value in the tunnel_cfg register(s) after reset
374	**/
375	static void fm10k_restore_udp_port_info(struct fm10k_intfc *interface)
376	{
377	struct fm10k_hw *hw = &interface->hw;
378
379	/* only the PF supports configuring tunnels */
380	if (hw->mac.type != fm10k_mac_pf)
381	return;
382
383	/* restore tunnel configuration register */
384	fm10k_write_reg(hw, FM10K_TUNNEL_CFG,
385	ntohs(interface->vxlan_port) |
386	(ETH_P_TEB << FM10K_TUNNEL_CFG_NVGRE_SHIFT));
387
388	/* restore Geneve tunnel configuration register */
389	fm10k_write_reg(hw, FM10K_TUNNEL_CFG_GENEVE,
390	ntohs(interface->geneve_port));
391	}
392
393	/**
394	* fm10k_udp_tunnel_sync - Called when UDP tunnel ports change
395	* @dev: network interface device structure
396	* @table: Tunnel table (according to tables of @fm10k_udp_tunnels)
397	*
398	* This function is called when a new UDP tunnel port is added or deleted.
399	* Due to hardware restrictions, only one port per type can be offloaded at
400	* once. Core will send to the driver a port of its choice.
401	**/
402	static int fm10k_udp_tunnel_sync(struct net_device *dev, unsigned int table)
403	{
404	struct fm10k_intfc *interface = netdev_priv(dev);
405	struct udp_tunnel_info ti;
406
407	udp_tunnel_nic_get_port(dev, table, idx: 0, ti: &ti);
408	if (!table)
409	interface->vxlan_port = ti.port;
410	else
411	interface->geneve_port = ti.port;
412
413	fm10k_restore_udp_port_info(interface);
414	return 0;
415	}
416
417	static const struct udp_tunnel_nic_info fm10k_udp_tunnels = {
418	.sync_table = fm10k_udp_tunnel_sync,
419	.tables = {
420	{ .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, },
421	{ .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_GENEVE, },
422	},
423	};
424
425	/**
426	* fm10k_open - Called when a network interface is made active
427	* @netdev: network interface device structure
428	*
429	* Returns 0 on success, negative value on failure
430	*
431	* The open entry point is called when a network interface is made
432	* active by the system (IFF_UP). At this point all resources needed
433	* for transmit and receive operations are allocated, the interrupt
434	* handler is registered with the OS, the watchdog timer is started,
435	* and the stack is notified that the interface is ready.
436	**/
437	int fm10k_open(struct net_device *netdev)
438	{
439	struct fm10k_intfc *interface = netdev_priv(dev: netdev);
440	int err;
441
442	/* allocate transmit descriptors */
443	err = fm10k_setup_all_tx_resources(interface);
444	if (err)
445	goto err_setup_tx;
446
447	/* allocate receive descriptors */
448	err = fm10k_setup_all_rx_resources(interface);
449	if (err)
450	goto err_setup_rx;
451
452	/* allocate interrupt resources */
453	err = fm10k_qv_request_irq(interface);
454	if (err)
455	goto err_req_irq;
456
457	/* setup GLORT assignment for this port */
458	fm10k_request_glort_range(interface);
459
460	/* Notify the stack of the actual queue counts */
461	err = netif_set_real_num_tx_queues(dev: netdev,
462	txq: interface->num_tx_queues);
463	if (err)
464	goto err_set_queues;
465
466	err = netif_set_real_num_rx_queues(dev: netdev,
467	rxq: interface->num_rx_queues);
468	if (err)
469	goto err_set_queues;
470
471	fm10k_up(interface);
472
473	return 0;
474
475	err_set_queues:
476	fm10k_qv_free_irq(interface);
477	err_req_irq:
478	fm10k_free_all_rx_resources(interface);
479	err_setup_rx:
480	fm10k_free_all_tx_resources(interface);
481	err_setup_tx:
482	return err;
483	}
484
485	/**
486	* fm10k_close - Disables a network interface
487	* @netdev: network interface device structure
488	*
489	* Returns 0, this is not allowed to fail
490	*
491	* The close entry point is called when an interface is de-activated
492	* by the OS. The hardware is still under the drivers control, but
493	* needs to be disabled. A global MAC reset is issued to stop the
494	* hardware, and all transmit and receive resources are freed.
495	**/
496	int fm10k_close(struct net_device *netdev)
497	{
498	struct fm10k_intfc *interface = netdev_priv(dev: netdev);
499
500	fm10k_down(interface);
501
502	fm10k_qv_free_irq(interface);
503
504	fm10k_free_all_tx_resources(interface);
505	fm10k_free_all_rx_resources(interface);
506
507	return 0;
508	}
509
510	static netdev_tx_t fm10k_xmit_frame(struct sk_buff *skb, struct net_device *dev)
511	{
512	struct fm10k_intfc *interface = netdev_priv(dev);
513	int num_tx_queues = READ_ONCE(interface->num_tx_queues);
514	unsigned int r_idx = skb->queue_mapping;
515	int err;
516
517	if (!num_tx_queues)
518	return NETDEV_TX_BUSY;
519
520	if ((skb->protocol == htons(ETH_P_8021Q)) &&
521	!skb_vlan_tag_present(skb)) {
522	/* FM10K only supports hardware tagging, any tags in frame
523	* are considered 2nd level or "outer" tags
524	*/
525	struct vlan_hdr *vhdr;
526	__be16 proto;
527
528	/* make sure skb is not shared */
529	skb = skb_share_check(skb, GFP_ATOMIC);
530	if (!skb)
531	return NETDEV_TX_OK;
532
533	/* make sure there is enough room to move the ethernet header */
534	if (unlikely(!pskb_may_pull(skb, VLAN_ETH_HLEN)))
535	return NETDEV_TX_OK;
536
537	/* verify the skb head is not shared */
538	err = skb_cow_head(skb, headroom: 0);
539	if (err) {
540	dev_kfree_skb(skb);
541	return NETDEV_TX_OK;
542	}
543
544	/* locate VLAN header */
545	vhdr = (struct vlan_hdr *)(skb->data + ETH_HLEN);
546
547	/* pull the 2 key pieces of data out of it */
548	__vlan_hwaccel_put_tag(skb,
549	htons(ETH_P_8021Q),
550	ntohs(vhdr->h_vlan_TCI));
551	proto = vhdr->h_vlan_encapsulated_proto;
552	skb->protocol = (ntohs(proto) >= 1536) ? proto :
553	htons(ETH_P_802_2);
554
555	/* squash it by moving the ethernet addresses up 4 bytes */
556	memmove(skb->data + VLAN_HLEN, skb->data, 12);
557	__skb_pull(skb, VLAN_HLEN);
558	skb_reset_mac_header(skb);
559	}
560
561	/* The minimum packet size for a single buffer is 17B so pad the skb
562	* in order to meet this minimum size requirement.
563	*/
564	if (unlikely(skb->len < 17)) {
565	int pad_len = 17 - skb->len;
566
567	if (skb_pad(skb, pad: pad_len))
568	return NETDEV_TX_OK;
569	__skb_put(skb, len: pad_len);
570	}
571
572	if (r_idx >= num_tx_queues)
573	r_idx %= num_tx_queues;
574
575	err = fm10k_xmit_frame_ring(skb, tx_ring: interface->tx_ring[r_idx]);
576
577	return err;
578	}
579
580	/**
581	* fm10k_tx_timeout - Respond to a Tx Hang
582	* @netdev: network interface device structure
583	* @txqueue: the index of the Tx queue that timed out
584	**/
585	static void fm10k_tx_timeout(struct net_device *netdev, unsigned int txqueue)
586	{
587	struct fm10k_intfc *interface = netdev_priv(dev: netdev);
588	struct fm10k_ring *tx_ring;
589	bool real_tx_hang = false;
590
591	if (txqueue >= interface->num_tx_queues) {
592	WARN(1, "invalid Tx queue index %d", txqueue);
593	return;
594	}
595
596	tx_ring = interface->tx_ring[txqueue];
597	if (check_for_tx_hang(tx_ring) && fm10k_check_tx_hang(tx_ring))
598	real_tx_hang = true;
599
600	#define TX_TIMEO_LIMIT 16000
601	if (real_tx_hang) {
602	fm10k_tx_timeout_reset(interface);
603	} else {
604	netif_info(interface, drv, netdev,
605	"Fake Tx hang detected with timeout of %d seconds\n",
606	netdev->watchdog_timeo / HZ);
607
608	/* fake Tx hang - increase the kernel timeout */
609	if (netdev->watchdog_timeo < TX_TIMEO_LIMIT)
610	netdev->watchdog_timeo *= 2;
611	}
612	}
613
614	/**
615	* fm10k_host_mbx_ready - Check PF interface's mailbox readiness
616	* @interface: board private structure
617	*
618	* This function checks if the PF interface's mailbox is ready before queueing
619	* mailbox messages for transmission. This will prevent filling the TX mailbox
620	* queue when the receiver is not ready. VF interfaces are exempt from this
621	* check since it will block all PF-VF mailbox messages from being sent from
622	* the VF to the PF at initialization.
623	**/
624	static bool fm10k_host_mbx_ready(struct fm10k_intfc *interface)
625	{
626	struct fm10k_hw *hw = &interface->hw;
627
628	return (hw->mac.type == fm10k_mac_vf || interface->host_ready);
629	}
630
631	/**
632	* fm10k_queue_vlan_request - Queue a VLAN update request
633	* @interface: the fm10k interface structure
634	* @vid: the VLAN vid
635	* @vsi: VSI index number
636	* @set: whether to set or clear
637	*
638	* This function queues up a VLAN update. For VFs, this must be sent to the
639	* managing PF over the mailbox. For PFs, we'll use the same handling so that
640	* it's similar to the VF. This avoids storming the PF<->VF mailbox with too
641	* many VLAN updates during reset.
642	*/
643	int fm10k_queue_vlan_request(struct fm10k_intfc *interface,
644	u32 vid, u8 vsi, bool set)
645	{
646	struct fm10k_macvlan_request *request;
647	unsigned long flags;
648
649	/* This must be atomic since we may be called while the netdev
650	* addr_list_lock is held
651	*/
652	request = kzalloc(size: sizeof(*request), GFP_ATOMIC);
653	if (!request)
654	return -ENOMEM;
655
656	request->type = FM10K_VLAN_REQUEST;
657	request->vlan.vid = vid;
658	request->vlan.vsi = vsi;
659	request->set = set;
660
661	spin_lock_irqsave(&interface->macvlan_lock, flags);
662	list_add_tail(new: &request->list, head: &interface->macvlan_requests);
663	spin_unlock_irqrestore(lock: &interface->macvlan_lock, flags);
664
665	fm10k_macvlan_schedule(interface);
666
667	return 0;
668	}
669
670	/**
671	* fm10k_queue_mac_request - Queue a MAC update request
672	* @interface: the fm10k interface structure
673	* @glort: the target glort for this update
674	* @addr: the address to update
675	* @vid: the vid to update
676	* @set: whether to add or remove
677	*
678	* This function queues up a MAC request for sending to the switch manager.
679	* A separate thread monitors the queue and sends updates to the switch
680	* manager. Return 0 on success, and negative error code on failure.
681	**/
682	int fm10k_queue_mac_request(struct fm10k_intfc *interface, u16 glort,
683	const unsigned char *addr, u16 vid, bool set)
684	{
685	struct fm10k_macvlan_request *request;
686	unsigned long flags;
687
688	/* This must be atomic since we may be called while the netdev
689	* addr_list_lock is held
690	*/
691	request = kzalloc(size: sizeof(*request), GFP_ATOMIC);
692	if (!request)
693	return -ENOMEM;
694
695	if (is_multicast_ether_addr(addr))
696	request->type = FM10K_MC_MAC_REQUEST;
697	else
698	request->type = FM10K_UC_MAC_REQUEST;
699
700	ether_addr_copy(dst: request->mac.addr, src: addr);
701	request->mac.glort = glort;
702	request->mac.vid = vid;
703	request->set = set;
704
705	spin_lock_irqsave(&interface->macvlan_lock, flags);
706	list_add_tail(new: &request->list, head: &interface->macvlan_requests);
707	spin_unlock_irqrestore(lock: &interface->macvlan_lock, flags);
708
709	fm10k_macvlan_schedule(interface);
710
711	return 0;
712	}
713
714	/**
715	* fm10k_clear_macvlan_queue - Cancel pending updates for a given glort
716	* @interface: the fm10k interface structure
717	* @glort: the target glort to clear
718	* @vlans: true to clear VLAN messages, false to ignore them
719	*
720	* Cancel any outstanding MAC/VLAN requests for a given glort. This is
721	* expected to be called when a logical port goes down.
722	**/
723	void fm10k_clear_macvlan_queue(struct fm10k_intfc *interface,
724	u16 glort, bool vlans)
725
726	{
727	struct fm10k_macvlan_request *r, *tmp;
728	unsigned long flags;
729
730	spin_lock_irqsave(&interface->macvlan_lock, flags);
731
732	/* Free any outstanding MAC/VLAN requests for this interface */
733	list_for_each_entry_safe(r, tmp, &interface->macvlan_requests, list) {
734	switch (r->type) {
735	case FM10K_MC_MAC_REQUEST:
736	case FM10K_UC_MAC_REQUEST:
737	/* Don't free requests for other interfaces */
738	if (r->mac.glort != glort)
739	break;
740	fallthrough;
741	case FM10K_VLAN_REQUEST:
742	if (vlans) {
743	list_del(entry: &r->list);
744	kfree(objp: r);
745	}
746	break;
747	}
748	}
749
750	spin_unlock_irqrestore(lock: &interface->macvlan_lock, flags);
751	}
752
753	static int fm10k_uc_vlan_unsync(struct net_device *netdev,
754	const unsigned char *uc_addr)
755	{
756	struct fm10k_intfc *interface = netdev_priv(dev: netdev);
757	u16 glort = interface->glort;
758	u16 vid = interface->vid;
759	bool set = !!(vid / VLAN_N_VID);
760	int err;
761
762	/* drop any leading bits on the VLAN ID */
763	vid &= VLAN_N_VID - 1;
764
765	err = fm10k_queue_mac_request(interface, glort, addr: uc_addr, vid, set);
766	if (err)
767	return err;
768
769	/* return non-zero value as we are only doing a partial sync/unsync */
770	return 1;
771	}
772
773	static int fm10k_mc_vlan_unsync(struct net_device *netdev,
774	const unsigned char *mc_addr)
775	{
776	struct fm10k_intfc *interface = netdev_priv(dev: netdev);
777	u16 glort = interface->glort;
778	u16 vid = interface->vid;
779	bool set = !!(vid / VLAN_N_VID);
780	int err;
781
782	/* drop any leading bits on the VLAN ID */
783	vid &= VLAN_N_VID - 1;
784
785	err = fm10k_queue_mac_request(interface, glort, addr: mc_addr, vid, set);
786	if (err)
787	return err;
788
789	/* return non-zero value as we are only doing a partial sync/unsync */
790	return 1;
791	}
792
793	static int fm10k_update_vid(struct net_device *netdev, u16 vid, bool set)
794	{
795	struct fm10k_intfc *interface = netdev_priv(dev: netdev);
796	struct fm10k_l2_accel *l2_accel = interface->l2_accel;
797	struct fm10k_hw *hw = &interface->hw;
798	u16 glort;
799	s32 err;
800	int i;
801
802	/* updates do not apply to VLAN 0 */
803	if (!vid)
804	return 0;
805
806	if (vid >= VLAN_N_VID)
807	return -EINVAL;
808
809	/* Verify that we have permission to add VLANs. If this is a request
810	* to remove a VLAN, we still want to allow the user to remove the
811	* VLAN device. In that case, we need to clear the bit in the
812	* active_vlans bitmask.
813	*/
814	if (set && hw->mac.vlan_override)
815	return -EACCES;
816
817	/* update active_vlans bitmask */
818	set_bit(nr: vid, addr: interface->active_vlans);
819	if (!set)
820	clear_bit(nr: vid, addr: interface->active_vlans);
821
822	/* disable the default VLAN ID on ring if we have an active VLAN */
823	for (i = 0; i < interface->num_rx_queues; i++) {
824	struct fm10k_ring *rx_ring = interface->rx_ring[i];
825	u16 rx_vid = rx_ring->vid & (VLAN_N_VID - 1);
826
827	if (test_bit(rx_vid, interface->active_vlans))
828	rx_ring->vid |= FM10K_VLAN_CLEAR;
829	else
830	rx_ring->vid &= ~FM10K_VLAN_CLEAR;
831	}
832
833	/* If our VLAN has been overridden, there is no reason to send VLAN
834	* removal requests as they will be silently ignored.
835	*/
836	if (hw->mac.vlan_override)
837	return 0;
838
839	/* Do not remove default VLAN ID related entries from VLAN and MAC
840	* tables
841	*/
842	if (!set && vid == hw->mac.default_vid)
843	return 0;
844
845	/* Do not throw an error if the interface is down. We will sync once
846	* we come up
847	*/
848	if (test_bit(__FM10K_DOWN, interface->state))
849	return 0;
850
851	fm10k_mbx_lock(interface);
852
853	/* only need to update the VLAN if not in promiscuous mode */
854	if (!(netdev->flags & IFF_PROMISC)) {
855	err = fm10k_queue_vlan_request(interface, vid, vsi: 0, set);
856	if (err)
857	goto err_out;
858	}
859
860	/* Update our base MAC address */
861	err = fm10k_queue_mac_request(interface, glort: interface->glort,
862	addr: hw->mac.addr, vid, set);
863	if (err)
864	goto err_out;
865
866	/* Update L2 accelerated macvlan addresses */
867	if (l2_accel) {
868	for (i = 0; i < l2_accel->size; i++) {
869	struct net_device *sdev = l2_accel->macvlan[i];
870
871	if (!sdev)
872	continue;
873
874	glort = l2_accel->dglort + 1 + i;
875
876	fm10k_queue_mac_request(interface, glort,
877	addr: sdev->dev_addr,
878	vid, set);
879	}
880	}
881
882	/* set VLAN ID prior to syncing/unsyncing the VLAN */
883	interface->vid = vid + (set ? VLAN_N_VID : 0);
884
885	/* Update the unicast and multicast address list to add/drop VLAN */
886	__dev_uc_unsync(dev: netdev, unsync: fm10k_uc_vlan_unsync);
887	__dev_mc_unsync(dev: netdev, unsync: fm10k_mc_vlan_unsync);
888
889	err_out:
890	fm10k_mbx_unlock(interface);
891
892	return err;
893	}
894
895	static int fm10k_vlan_rx_add_vid(struct net_device *netdev,
896	__always_unused __be16 proto, u16 vid)
897	{
898	/* update VLAN and address table based on changes */
899	return fm10k_update_vid(netdev, vid, set: true);
900	}
901
902	static int fm10k_vlan_rx_kill_vid(struct net_device *netdev,
903	__always_unused __be16 proto, u16 vid)
904	{
905	/* update VLAN and address table based on changes */
906	return fm10k_update_vid(netdev, vid, set: false);
907	}
908
909	static u16 fm10k_find_next_vlan(struct fm10k_intfc *interface, u16 vid)
910	{
911	struct fm10k_hw *hw = &interface->hw;
912	u16 default_vid = hw->mac.default_vid;
913	u16 vid_limit = vid < default_vid ? default_vid : VLAN_N_VID;
914
915	vid = find_next_bit(addr: interface->active_vlans, size: vid_limit, offset: ++vid);
916
917	return vid;
918	}
919
920	static void fm10k_clear_unused_vlans(struct fm10k_intfc *interface)
921	{
922	u32 vid, prev_vid;
923
924	/* loop through and find any gaps in the table */
925	for (vid = 0, prev_vid = 0;
926	prev_vid < VLAN_N_VID;
927	prev_vid = vid + 1, vid = fm10k_find_next_vlan(interface, vid)) {
928	if (prev_vid == vid)
929	continue;
930
931	/* send request to clear multiple bits at a time */
932	prev_vid += (vid - prev_vid - 1) << FM10K_VLAN_LENGTH_SHIFT;
933	fm10k_queue_vlan_request(interface, vid: prev_vid, vsi: 0, set: false);
934	}
935	}
936
937	static int __fm10k_uc_sync(struct net_device *dev,
938	const unsigned char *addr, bool sync)
939	{
940	struct fm10k_intfc *interface = netdev_priv(dev);
941	u16 vid, glort = interface->glort;
942	s32 err;
943
944	if (!is_valid_ether_addr(addr))
945	return -EADDRNOTAVAIL;
946
947	for (vid = fm10k_find_next_vlan(interface, vid: 0);
948	vid < VLAN_N_VID;
949	vid = fm10k_find_next_vlan(interface, vid)) {
950	err = fm10k_queue_mac_request(interface, glort,
951	addr, vid, set: sync);
952	if (err)
953	return err;
954	}
955
956	return 0;
957	}
958
959	static int fm10k_uc_sync(struct net_device *dev,
960	const unsigned char *addr)
961	{
962	return __fm10k_uc_sync(dev, addr, sync: true);
963	}
964
965	static int fm10k_uc_unsync(struct net_device *dev,
966	const unsigned char *addr)
967	{
968	return __fm10k_uc_sync(dev, addr, sync: false);
969	}
970
971	static int fm10k_set_mac(struct net_device *dev, void *p)
972	{
973	struct fm10k_intfc *interface = netdev_priv(dev);
974	struct fm10k_hw *hw = &interface->hw;
975	struct sockaddr *addr = p;
976	s32 err = 0;
977
978	if (!is_valid_ether_addr(addr: addr->sa_data))
979	return -EADDRNOTAVAIL;
980
981	if (dev->flags & IFF_UP) {
982	/* setting MAC address requires mailbox */
983	fm10k_mbx_lock(interface);
984
985	err = fm10k_uc_sync(dev, addr: addr->sa_data);
986	if (!err)
987	fm10k_uc_unsync(dev, addr: hw->mac.addr);
988
989	fm10k_mbx_unlock(interface);
990	}
991
992	if (!err) {
993	eth_hw_addr_set(dev, addr: addr->sa_data);
994	ether_addr_copy(dst: hw->mac.addr, src: addr->sa_data);
995	dev->addr_assign_type &= ~NET_ADDR_RANDOM;
996	}
997
998	/* if we had a mailbox error suggest trying again */
999	return err ? -EAGAIN : 0;
1000	}
1001
1002	static int __fm10k_mc_sync(struct net_device *dev,
1003	const unsigned char *addr, bool sync)
1004	{
1005	struct fm10k_intfc *interface = netdev_priv(dev);
1006	u16 vid, glort = interface->glort;
1007	s32 err;
1008
1009	if (!is_multicast_ether_addr(addr))
1010	return -EADDRNOTAVAIL;
1011
1012	for (vid = fm10k_find_next_vlan(interface, vid: 0);
1013	vid < VLAN_N_VID;
1014	vid = fm10k_find_next_vlan(interface, vid)) {
1015	err = fm10k_queue_mac_request(interface, glort,
1016	addr, vid, set: sync);
1017	if (err)
1018	return err;
1019	}
1020
1021	return 0;
1022	}
1023
1024	static int fm10k_mc_sync(struct net_device *dev,
1025	const unsigned char *addr)
1026	{
1027	return __fm10k_mc_sync(dev, addr, sync: true);
1028	}
1029
1030	static int fm10k_mc_unsync(struct net_device *dev,
1031	const unsigned char *addr)
1032	{
1033	return __fm10k_mc_sync(dev, addr, sync: false);
1034	}
1035
1036	static void fm10k_set_rx_mode(struct net_device *dev)
1037	{
1038	struct fm10k_intfc *interface = netdev_priv(dev);
1039	struct fm10k_hw *hw = &interface->hw;
1040	int xcast_mode;
1041
1042	/* no need to update the harwdare if we are not running */
1043	if (!(dev->flags & IFF_UP))
1044	return;
1045
1046	/* determine new mode based on flags */
1047	xcast_mode = (dev->flags & IFF_PROMISC) ? FM10K_XCAST_MODE_PROMISC :
1048	(dev->flags & IFF_ALLMULTI) ? FM10K_XCAST_MODE_ALLMULTI :
1049	(dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ?
1050	FM10K_XCAST_MODE_MULTI : FM10K_XCAST_MODE_NONE;
1051
1052	fm10k_mbx_lock(interface);
1053
1054	/* update xcast mode first, but only if it changed */
1055	if (interface->xcast_mode != xcast_mode) {
1056	/* update VLAN table when entering promiscuous mode */
1057	if (xcast_mode == FM10K_XCAST_MODE_PROMISC)
1058	fm10k_queue_vlan_request(interface, FM10K_VLAN_ALL,
1059	vsi: 0, set: true);
1060
1061	/* clear VLAN table when exiting promiscuous mode */
1062	if (interface->xcast_mode == FM10K_XCAST_MODE_PROMISC)
1063	fm10k_clear_unused_vlans(interface);
1064
1065	/* update xcast mode if host's mailbox is ready */
1066	if (fm10k_host_mbx_ready(interface))
1067	hw->mac.ops.update_xcast_mode(hw, interface->glort,
1068	xcast_mode);
1069
1070	/* record updated xcast mode state */
1071	interface->xcast_mode = xcast_mode;
1072	}
1073
1074	/* synchronize all of the addresses */
1075	__dev_uc_sync(dev, sync: fm10k_uc_sync, unsync: fm10k_uc_unsync);
1076	__dev_mc_sync(dev, sync: fm10k_mc_sync, unsync: fm10k_mc_unsync);
1077
1078	fm10k_mbx_unlock(interface);
1079	}
1080
1081	void fm10k_restore_rx_state(struct fm10k_intfc *interface)
1082	{
1083	struct fm10k_l2_accel *l2_accel = interface->l2_accel;
1084	struct net_device *netdev = interface->netdev;
1085	struct fm10k_hw *hw = &interface->hw;
1086	int xcast_mode, i;
1087	u16 vid, glort;
1088
1089	/* record glort for this interface */
1090	glort = interface->glort;
1091
1092	/* convert interface flags to xcast mode */
1093	if (netdev->flags & IFF_PROMISC)
1094	xcast_mode = FM10K_XCAST_MODE_PROMISC;
1095	else if (netdev->flags & IFF_ALLMULTI)
1096	xcast_mode = FM10K_XCAST_MODE_ALLMULTI;
1097	else if (netdev->flags & (IFF_BROADCAST | IFF_MULTICAST))
1098	xcast_mode = FM10K_XCAST_MODE_MULTI;
1099	else
1100	xcast_mode = FM10K_XCAST_MODE_NONE;
1101
1102	fm10k_mbx_lock(interface);
1103
1104	/* Enable logical port if host's mailbox is ready */
1105	if (fm10k_host_mbx_ready(interface))
1106	hw->mac.ops.update_lport_state(hw, glort,
1107	interface->glort_count, true);
1108
1109	/* update VLAN table */
1110	fm10k_queue_vlan_request(interface, FM10K_VLAN_ALL, vsi: 0,
1111	set: xcast_mode == FM10K_XCAST_MODE_PROMISC);
1112
1113	/* update table with current entries */
1114	for (vid = fm10k_find_next_vlan(interface, vid: 0);
1115	vid < VLAN_N_VID;
1116	vid = fm10k_find_next_vlan(interface, vid)) {
1117	fm10k_queue_vlan_request(interface, vid, vsi: 0, set: true);
1118
1119	fm10k_queue_mac_request(interface, glort,
1120	addr: hw->mac.addr, vid, set: true);
1121
1122	/* synchronize macvlan addresses */
1123	if (l2_accel) {
1124	for (i = 0; i < l2_accel->size; i++) {
1125	struct net_device *sdev = l2_accel->macvlan[i];
1126
1127	if (!sdev)
1128	continue;
1129
1130	glort = l2_accel->dglort + 1 + i;
1131
1132	fm10k_queue_mac_request(interface, glort,
1133	addr: sdev->dev_addr,
1134	vid, set: true);
1135	}
1136	}
1137	}
1138
1139	/* update xcast mode before synchronizing addresses if host's mailbox
1140	* is ready
1141	*/
1142	if (fm10k_host_mbx_ready(interface))
1143	hw->mac.ops.update_xcast_mode(hw, glort, xcast_mode);
1144
1145	/* synchronize all of the addresses */
1146	__dev_uc_sync(dev: netdev, sync: fm10k_uc_sync, unsync: fm10k_uc_unsync);
1147	__dev_mc_sync(dev: netdev, sync: fm10k_mc_sync, unsync: fm10k_mc_unsync);
1148
1149	/* synchronize macvlan addresses */
1150	if (l2_accel) {
1151	for (i = 0; i < l2_accel->size; i++) {
1152	struct net_device *sdev = l2_accel->macvlan[i];
1153
1154	if (!sdev)
1155	continue;
1156
1157	glort = l2_accel->dglort + 1 + i;
1158
1159	hw->mac.ops.update_xcast_mode(hw, glort,
1160	FM10K_XCAST_MODE_NONE);
1161	fm10k_queue_mac_request(interface, glort,
1162	addr: sdev->dev_addr,
1163	vid: hw->mac.default_vid, set: true);
1164	}
1165	}
1166
1167	fm10k_mbx_unlock(interface);
1168
1169	/* record updated xcast mode state */
1170	interface->xcast_mode = xcast_mode;
1171
1172	/* Restore tunnel configuration */
1173	fm10k_restore_udp_port_info(interface);
1174	}
1175
1176	void fm10k_reset_rx_state(struct fm10k_intfc *interface)
1177	{
1178	struct net_device *netdev = interface->netdev;
1179	struct fm10k_hw *hw = &interface->hw;
1180
1181	/* Wait for MAC/VLAN work to finish */
1182	while (test_bit(__FM10K_MACVLAN_SCHED, interface->state))
1183	usleep_range(min: 1000, max: 2000);
1184
1185	/* Cancel pending MAC/VLAN requests */
1186	fm10k_clear_macvlan_queue(interface, glort: interface->glort, vlans: true);
1187
1188	fm10k_mbx_lock(interface);
1189
1190	/* clear the logical port state on lower device if host's mailbox is
1191	* ready
1192	*/
1193	if (fm10k_host_mbx_ready(interface))
1194	hw->mac.ops.update_lport_state(hw, interface->glort,
1195	interface->glort_count, false);
1196
1197	fm10k_mbx_unlock(interface);
1198
1199	/* reset flags to default state */
1200	interface->xcast_mode = FM10K_XCAST_MODE_NONE;
1201
1202	/* clear the sync flag since the lport has been dropped */
1203	__dev_uc_unsync(dev: netdev, NULL);
1204	__dev_mc_unsync(dev: netdev, NULL);
1205	}
1206
1207	/**
1208	* fm10k_get_stats64 - Get System Network Statistics
1209	* @netdev: network interface device structure
1210	* @stats: storage space for 64bit statistics
1211	*
1212	* Obtain 64bit statistics in a way that is safe for both 32bit and 64bit
1213	* architectures.
1214	*/
1215	static void fm10k_get_stats64(struct net_device *netdev,
1216	struct rtnl_link_stats64 *stats)
1217	{
1218	struct fm10k_intfc *interface = netdev_priv(dev: netdev);
1219	struct fm10k_ring *ring;
1220	unsigned int start, i;
1221	u64 bytes, packets;
1222
1223	rcu_read_lock();
1224
1225	for (i = 0; i < interface->num_rx_queues; i++) {
1226	ring = READ_ONCE(interface->rx_ring[i]);
1227
1228	if (!ring)
1229	continue;
1230
1231	do {
1232	start = u64_stats_fetch_begin(syncp: &ring->syncp);
1233	packets = ring->stats.packets;
1234	bytes = ring->stats.bytes;
1235	} while (u64_stats_fetch_retry(syncp: &ring->syncp, start));
1236
1237	stats->rx_packets += packets;
1238	stats->rx_bytes += bytes;
1239	}
1240
1241	for (i = 0; i < interface->num_tx_queues; i++) {
1242	ring = READ_ONCE(interface->tx_ring[i]);
1243
1244	if (!ring)
1245	continue;
1246
1247	do {
1248	start = u64_stats_fetch_begin(syncp: &ring->syncp);
1249	packets = ring->stats.packets;
1250	bytes = ring->stats.bytes;
1251	} while (u64_stats_fetch_retry(syncp: &ring->syncp, start));
1252
1253	stats->tx_packets += packets;
1254	stats->tx_bytes += bytes;
1255	}
1256
1257	rcu_read_unlock();
1258
1259	/* following stats updated by fm10k_service_task() */
1260	stats->rx_missed_errors = netdev->stats.rx_missed_errors;
1261	}
1262
1263	int fm10k_setup_tc(struct net_device *dev, u8 tc)
1264	{
1265	struct fm10k_intfc *interface = netdev_priv(dev);
1266	int err;
1267
1268	/* Currently only the PF supports priority classes */
1269	if (tc && (interface->hw.mac.type != fm10k_mac_pf))
1270	return -EINVAL;
1271
1272	/* Hardware supports up to 8 traffic classes */
1273	if (tc > 8)
1274	return -EINVAL;
1275
1276	/* Hardware has to reinitialize queues to match packet
1277	* buffer alignment. Unfortunately, the hardware is not
1278	* flexible enough to do this dynamically.
1279	*/
1280	if (netif_running(dev))
1281	fm10k_close(netdev: dev);
1282
1283	fm10k_mbx_free_irq(interface);
1284
1285	fm10k_clear_queueing_scheme(interface);
1286
1287	/* we expect the prio_tc map to be repopulated later */
1288	netdev_reset_tc(dev);
1289	netdev_set_num_tc(dev, num_tc: tc);
1290
1291	err = fm10k_init_queueing_scheme(interface);
1292	if (err)
1293	goto err_queueing_scheme;
1294
1295	err = fm10k_mbx_request_irq(interface);
1296	if (err)
1297	goto err_mbx_irq;
1298
1299	err = netif_running(dev) ? fm10k_open(netdev: dev) : 0;
1300	if (err)
1301	goto err_open;
1302
1303	/* flag to indicate SWPRI has yet to be updated */
1304	set_bit(nr: FM10K_FLAG_SWPRI_CONFIG, addr: interface->flags);
1305
1306	return 0;
1307	err_open:
1308	fm10k_mbx_free_irq(interface);
1309	err_mbx_irq:
1310	fm10k_clear_queueing_scheme(interface);
1311	err_queueing_scheme:
1312	netif_device_detach(dev);
1313
1314	return err;
1315	}
1316
1317	static int __fm10k_setup_tc(struct net_device *dev, enum tc_setup_type type,
1318	void *type_data)
1319	{
1320	struct tc_mqprio_qopt *mqprio = type_data;
1321
1322	if (type != TC_SETUP_QDISC_MQPRIO)
1323	return -EOPNOTSUPP;
1324
1325	mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
1326
1327	return fm10k_setup_tc(dev, tc: mqprio->num_tc);
1328	}
1329
1330	static void fm10k_assign_l2_accel(struct fm10k_intfc *interface,
1331	struct fm10k_l2_accel *l2_accel)
1332	{
1333	int i;
1334
1335	for (i = 0; i < interface->num_rx_queues; i++) {
1336	struct fm10k_ring *ring = interface->rx_ring[i];
1337
1338	rcu_assign_pointer(ring->l2_accel, l2_accel);
1339	}
1340
1341	interface->l2_accel = l2_accel;
1342	}
1343
1344	static void *fm10k_dfwd_add_station(struct net_device *dev,
1345	struct net_device *sdev)
1346	{
1347	struct fm10k_intfc *interface = netdev_priv(dev);
1348	struct fm10k_l2_accel *l2_accel = interface->l2_accel;
1349	struct fm10k_l2_accel *old_l2_accel = NULL;
1350	struct fm10k_dglort_cfg dglort = { 0 };
1351	struct fm10k_hw *hw = &interface->hw;
1352	int size, i;
1353	u16 vid, glort;
1354
1355	/* The hardware supported by fm10k only filters on the destination MAC
1356	* address. In order to avoid issues we only support offloading modes
1357	* where the hardware can actually provide the functionality.
1358	*/
1359	if (!macvlan_supports_dest_filter(dev: sdev))
1360	return ERR_PTR(error: -EMEDIUMTYPE);
1361
1362	/* allocate l2 accel structure if it is not available */
1363	if (!l2_accel) {
1364	/* verify there is enough free GLORTs to support l2_accel */
1365	if (interface->glort_count < 7)
1366	return ERR_PTR(error: -EBUSY);
1367
1368	size = offsetof(struct fm10k_l2_accel, macvlan[7]);
1369	l2_accel = kzalloc(size, GFP_KERNEL);
1370	if (!l2_accel)
1371	return ERR_PTR(error: -ENOMEM);
1372
1373	l2_accel->size = 7;
1374	l2_accel->dglort = interface->glort;
1375
1376	/* update pointers */
1377	fm10k_assign_l2_accel(interface, l2_accel);
1378	/* do not expand if we are at our limit */
1379	} else if ((l2_accel->count == FM10K_MAX_STATIONS) ||
1380	(l2_accel->count == (interface->glort_count - 1))) {
1381	return ERR_PTR(error: -EBUSY);
1382	/* expand if we have hit the size limit */
1383	} else if (l2_accel->count == l2_accel->size) {
1384	old_l2_accel = l2_accel;
1385	size = offsetof(struct fm10k_l2_accel,
1386	macvlan[(l2_accel->size * 2) + 1]);
1387	l2_accel = kzalloc(size, GFP_KERNEL);
1388	if (!l2_accel)
1389	return ERR_PTR(error: -ENOMEM);
1390
1391	memcpy(l2_accel, old_l2_accel,
1392	offsetof(struct fm10k_l2_accel,
1393	macvlan[old_l2_accel->size]));
1394
1395	l2_accel->size = (old_l2_accel->size * 2) + 1;
1396
1397	/* update pointers */
1398	fm10k_assign_l2_accel(interface, l2_accel);
1399	kfree_rcu(old_l2_accel, rcu);
1400	}
1401
1402	/* add macvlan to accel table, and record GLORT for position */
1403	for (i = 0; i < l2_accel->size; i++) {
1404	if (!l2_accel->macvlan[i])
1405	break;
1406	}
1407
1408	/* record station */
1409	l2_accel->macvlan[i] = sdev;
1410	l2_accel->count++;
1411
1412	/* configure default DGLORT mapping for RSS/DCB */
1413	dglort.idx = fm10k_dglort_pf_rss;
1414	dglort.inner_rss = 1;
1415	dglort.rss_l = fls(x: interface->ring_feature[RING_F_RSS].mask);
1416	dglort.pc_l = fls(x: interface->ring_feature[RING_F_QOS].mask);
1417	dglort.glort = interface->glort;
1418	dglort.shared_l = fls(x: l2_accel->size);
1419	hw->mac.ops.configure_dglort_map(hw, &dglort);
1420
1421	/* Add rules for this specific dglort to the switch */
1422	fm10k_mbx_lock(interface);
1423
1424	glort = l2_accel->dglort + 1 + i;
1425
1426	if (fm10k_host_mbx_ready(interface))
1427	hw->mac.ops.update_xcast_mode(hw, glort,
1428	FM10K_XCAST_MODE_NONE);
1429
1430	fm10k_queue_mac_request(interface, glort, addr: sdev->dev_addr,
1431	vid: hw->mac.default_vid, set: true);
1432
1433	for (vid = fm10k_find_next_vlan(interface, vid: 0);
1434	vid < VLAN_N_VID;
1435	vid = fm10k_find_next_vlan(interface, vid))
1436	fm10k_queue_mac_request(interface, glort, addr: sdev->dev_addr,
1437	vid, set: true);
1438
1439	fm10k_mbx_unlock(interface);
1440
1441	return sdev;
1442	}
1443
1444	static void fm10k_dfwd_del_station(struct net_device *dev, void *priv)
1445	{
1446	struct fm10k_intfc *interface = netdev_priv(dev);
1447	struct fm10k_l2_accel *l2_accel = READ_ONCE(interface->l2_accel);
1448	struct fm10k_dglort_cfg dglort = { 0 };
1449	struct fm10k_hw *hw = &interface->hw;
1450	struct net_device *sdev = priv;
1451	u16 vid, glort;
1452	int i;
1453
1454	if (!l2_accel)
1455	return;
1456
1457	/* search table for matching interface */
1458	for (i = 0; i < l2_accel->size; i++) {
1459	if (l2_accel->macvlan[i] == sdev)
1460	break;
1461	}
1462
1463	/* exit if macvlan not found */
1464	if (i == l2_accel->size)
1465	return;
1466
1467	/* Remove any rules specific to this dglort */
1468	fm10k_mbx_lock(interface);
1469
1470	glort = l2_accel->dglort + 1 + i;
1471
1472	if (fm10k_host_mbx_ready(interface))
1473	hw->mac.ops.update_xcast_mode(hw, glort,
1474	FM10K_XCAST_MODE_NONE);
1475
1476	fm10k_queue_mac_request(interface, glort, addr: sdev->dev_addr,
1477	vid: hw->mac.default_vid, set: false);
1478
1479	for (vid = fm10k_find_next_vlan(interface, vid: 0);
1480	vid < VLAN_N_VID;
1481	vid = fm10k_find_next_vlan(interface, vid))
1482	fm10k_queue_mac_request(interface, glort, addr: sdev->dev_addr,
1483	vid, set: false);
1484
1485	fm10k_mbx_unlock(interface);
1486
1487	/* record removal */
1488	l2_accel->macvlan[i] = NULL;
1489	l2_accel->count--;
1490
1491	/* configure default DGLORT mapping for RSS/DCB */
1492	dglort.idx = fm10k_dglort_pf_rss;
1493	dglort.inner_rss = 1;
1494	dglort.rss_l = fls(x: interface->ring_feature[RING_F_RSS].mask);
1495	dglort.pc_l = fls(x: interface->ring_feature[RING_F_QOS].mask);
1496	dglort.glort = interface->glort;
1497	dglort.shared_l = fls(x: l2_accel->size);
1498	hw->mac.ops.configure_dglort_map(hw, &dglort);
1499
1500	/* If table is empty remove it */
1501	if (l2_accel->count == 0) {
1502	fm10k_assign_l2_accel(interface, NULL);
1503	kfree_rcu(l2_accel, rcu);
1504	}
1505	}
1506
1507	static netdev_features_t fm10k_features_check(struct sk_buff *skb,
1508	struct net_device *dev,
1509	netdev_features_t features)
1510	{
1511	if (!skb->encapsulation || fm10k_tx_encap_offload(skb))
1512	return features;
1513
1514	return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
1515	}
1516
1517	static const struct net_device_ops fm10k_netdev_ops = {
1518	.ndo_open = fm10k_open,
1519	.ndo_stop = fm10k_close,
1520	.ndo_validate_addr = eth_validate_addr,
1521	.ndo_start_xmit = fm10k_xmit_frame,
1522	.ndo_set_mac_address = fm10k_set_mac,
1523	.ndo_tx_timeout = fm10k_tx_timeout,
1524	.ndo_vlan_rx_add_vid = fm10k_vlan_rx_add_vid,
1525	.ndo_vlan_rx_kill_vid = fm10k_vlan_rx_kill_vid,
1526	.ndo_set_rx_mode = fm10k_set_rx_mode,
1527	.ndo_get_stats64 = fm10k_get_stats64,
1528	.ndo_setup_tc = __fm10k_setup_tc,
1529	.ndo_set_vf_mac = fm10k_ndo_set_vf_mac,
1530	.ndo_set_vf_vlan = fm10k_ndo_set_vf_vlan,
1531	.ndo_set_vf_rate = fm10k_ndo_set_vf_bw,
1532	.ndo_get_vf_config = fm10k_ndo_get_vf_config,
1533	.ndo_get_vf_stats = fm10k_ndo_get_vf_stats,
1534	.ndo_dfwd_add_station = fm10k_dfwd_add_station,
1535	.ndo_dfwd_del_station = fm10k_dfwd_del_station,
1536	.ndo_features_check = fm10k_features_check,
1537	};
1538
1539	#define DEFAULT_DEBUG_LEVEL_SHIFT 3
1540
1541	struct net_device *fm10k_alloc_netdev(const struct fm10k_info *info)
1542	{
1543	netdev_features_t hw_features;
1544	struct fm10k_intfc *interface;
1545	struct net_device *dev;
1546
1547	dev = alloc_etherdev_mq(sizeof(struct fm10k_intfc), MAX_QUEUES);
1548	if (!dev)
1549	return NULL;
1550
1551	/* set net device and ethtool ops */
1552	dev->netdev_ops = &fm10k_netdev_ops;
1553	fm10k_set_ethtool_ops(dev);
1554
1555	/* configure default debug level */
1556	interface = netdev_priv(dev);
1557	interface->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
1558
1559	/* configure default features */
1560	dev->features |= NETIF_F_IP_CSUM |
1561	NETIF_F_IPV6_CSUM |
1562	NETIF_F_SG |
1563	NETIF_F_TSO |
1564	NETIF_F_TSO6 |
1565	NETIF_F_TSO_ECN |
1566	NETIF_F_RXHASH |
1567	NETIF_F_RXCSUM;
1568
1569	/* Only the PF can support VXLAN and NVGRE tunnel offloads */
1570	if (info->mac == fm10k_mac_pf) {
1571	dev->hw_enc_features = NETIF_F_IP_CSUM |
1572	NETIF_F_TSO |
1573	NETIF_F_TSO6 |
1574	NETIF_F_TSO_ECN |
1575	NETIF_F_GSO_UDP_TUNNEL |
1576	NETIF_F_IPV6_CSUM |
1577	NETIF_F_SG;
1578
1579	dev->features |= NETIF_F_GSO_UDP_TUNNEL;
1580
1581	dev->udp_tunnel_nic_info = &fm10k_udp_tunnels;
1582	}
1583
1584	/* all features defined to this point should be changeable */
1585	hw_features = dev->features;
1586
1587	/* allow user to enable L2 forwarding acceleration */
1588	hw_features |= NETIF_F_HW_L2FW_DOFFLOAD;
1589
1590	/* configure VLAN features */
1591	dev->vlan_features |= dev->features;
1592
1593	/* we want to leave these both on as we cannot disable VLAN tag
1594	* insertion or stripping on the hardware since it is contained
1595	* in the FTAG and not in the frame itself.
1596	*/
1597	dev->features |= NETIF_F_HW_VLAN_CTAG_TX |
1598	NETIF_F_HW_VLAN_CTAG_RX |
1599	NETIF_F_HW_VLAN_CTAG_FILTER;
1600
1601	dev->priv_flags |= IFF_UNICAST_FLT;
1602
1603	dev->hw_features |= hw_features;
1604
1605	/* MTU range: 68 - 15342 */
1606	dev->min_mtu = ETH_MIN_MTU;
1607	dev->max_mtu = FM10K_MAX_JUMBO_FRAME_SIZE;
1608
1609	return dev;
1610	}
1611