1	// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2	/* Copyright 2014-2016 Freescale Semiconductor Inc.
3	* Copyright 2016-2022 NXP
4	*/
5	#include <linux/init.h>
6	#include <linux/module.h>
7	#include <linux/platform_device.h>
8	#include <linux/etherdevice.h>
9	#include <linux/of_net.h>
10	#include <linux/interrupt.h>
11	#include <linux/kthread.h>
12	#include <linux/iommu.h>
13	#include <linux/fsl/mc.h>
14	#include <linux/bpf.h>
15	#include <linux/bpf_trace.h>
16	#include <linux/fsl/ptp_qoriq.h>
17	#include <linux/ptp_classify.h>
18	#include <net/pkt_cls.h>
19	#include <net/sock.h>
20	#include <net/tso.h>
21	#include <net/xdp_sock_drv.h>
22
23	#include "dpaa2-eth.h"
24
25	/* CREATE_TRACE_POINTS only needs to be defined once. Other dpa files
26	* using trace events only need to #include <trace/events/sched.h>
27	*/
28	#define CREATE_TRACE_POINTS
29	#include "dpaa2-eth-trace.h"
30
31	MODULE_LICENSE("Dual BSD/GPL");
32	MODULE_AUTHOR("Freescale Semiconductor, Inc");
33	MODULE_DESCRIPTION("Freescale DPAA2 Ethernet Driver");
34
35	struct ptp_qoriq *dpaa2_ptp;
36	EXPORT_SYMBOL(dpaa2_ptp);
37
38	static void dpaa2_eth_detect_features(struct dpaa2_eth_priv *priv)
39	{
40	priv->features = 0;
41
42	if (dpaa2_eth_cmp_dpni_ver(priv, DPNI_PTP_ONESTEP_VER_MAJOR,
43	DPNI_PTP_ONESTEP_VER_MINOR) >= 0)
44	priv->features |= DPAA2_ETH_FEATURE_ONESTEP_CFG_DIRECT;
45	}
46
47	static void dpaa2_update_ptp_onestep_indirect(struct dpaa2_eth_priv *priv,
48	u32 offset, u8 udp)
49	{
50	struct dpni_single_step_cfg cfg;
51
52	cfg.en = 1;
53	cfg.ch_update = udp;
54	cfg.offset = offset;
55	cfg.peer_delay = 0;
56
57	if (dpni_set_single_step_cfg(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, ptp_cfg: &cfg))
58	WARN_ONCE(1, "Failed to set single step register");
59	}
60
61	static void dpaa2_update_ptp_onestep_direct(struct dpaa2_eth_priv *priv,
62	u32 offset, u8 udp)
63	{
64	u32 val = 0;
65
66	val = DPAA2_PTP_SINGLE_STEP_ENABLE |
67	DPAA2_PTP_SINGLE_CORRECTION_OFF(offset);
68
69	if (udp)
70	val |= DPAA2_PTP_SINGLE_STEP_CH;
71
72	if (priv->onestep_reg_base)
73	writel(val, addr: priv->onestep_reg_base);
74	}
75
76	static void dpaa2_ptp_onestep_reg_update_method(struct dpaa2_eth_priv *priv)
77	{
78	struct device *dev = priv->net_dev->dev.parent;
79	struct dpni_single_step_cfg ptp_cfg;
80
81	priv->dpaa2_set_onestep_params_cb = dpaa2_update_ptp_onestep_indirect;
82
83	if (!(priv->features & DPAA2_ETH_FEATURE_ONESTEP_CFG_DIRECT))
84	return;
85
86	if (dpni_get_single_step_cfg(mc_io: priv->mc_io, cmd_flags: 0,
87	token: priv->mc_token, ptp_cfg: &ptp_cfg)) {
88	dev_err(dev, "dpni_get_single_step_cfg cannot retrieve onestep reg, falling back to indirect update\n");
89	return;
90	}
91
92	if (!ptp_cfg.ptp_onestep_reg_base) {
93	dev_err(dev, "1588 onestep reg not available, falling back to indirect update\n");
94	return;
95	}
96
97	priv->onestep_reg_base = ioremap(offset: ptp_cfg.ptp_onestep_reg_base,
98	size: sizeof(u32));
99	if (!priv->onestep_reg_base) {
100	dev_err(dev, "1588 onestep reg cannot be mapped, falling back to indirect update\n");
101	return;
102	}
103
104	priv->dpaa2_set_onestep_params_cb = dpaa2_update_ptp_onestep_direct;
105	}
106
107	void *dpaa2_iova_to_virt(struct iommu_domain *domain,
108	dma_addr_t iova_addr)
109	{
110	phys_addr_t phys_addr;
111
112	phys_addr = domain ? iommu_iova_to_phys(domain, iova: iova_addr) : iova_addr;
113
114	return phys_to_virt(address: phys_addr);
115	}
116
117	static void dpaa2_eth_validate_rx_csum(struct dpaa2_eth_priv *priv,
118	u32 fd_status,
119	struct sk_buff *skb)
120	{
121	skb_checksum_none_assert(skb);
122
123	/* HW checksum validation is disabled, nothing to do here */
124	if (!(priv->net_dev->features & NETIF_F_RXCSUM))
125	return;
126
127	/* Read checksum validation bits */
128	if (!((fd_status & DPAA2_FAS_L3CV) &&
129	(fd_status & DPAA2_FAS_L4CV)))
130	return;
131
132	/* Inform the stack there's no need to compute L3/L4 csum anymore */
133	skb->ip_summed = CHECKSUM_UNNECESSARY;
134	}
135
136	/* Free a received FD.
137	* Not to be used for Tx conf FDs or on any other paths.
138	*/
139	static void dpaa2_eth_free_rx_fd(struct dpaa2_eth_priv *priv,
140	const struct dpaa2_fd *fd,
141	void *vaddr)
142	{
143	struct device *dev = priv->net_dev->dev.parent;
144	dma_addr_t addr = dpaa2_fd_get_addr(fd);
145	u8 fd_format = dpaa2_fd_get_format(fd);
146	struct dpaa2_sg_entry *sgt;
147	void *sg_vaddr;
148	int i;
149
150	/* If single buffer frame, just free the data buffer */
151	if (fd_format == dpaa2_fd_single)
152	goto free_buf;
153	else if (fd_format != dpaa2_fd_sg)
154	/* We don't support any other format */
155	return;
156
157	/* For S/G frames, we first need to free all SG entries
158	* except the first one, which was taken care of already
159	*/
160	sgt = vaddr + dpaa2_fd_get_offset(fd);
161	for (i = 1; i < DPAA2_ETH_MAX_SG_ENTRIES; i++) {
162	addr = dpaa2_sg_get_addr(sg: &sgt[i]);
163	sg_vaddr = dpaa2_iova_to_virt(domain: priv->iommu_domain, iova_addr: addr);
164	dma_unmap_page(dev, addr, priv->rx_buf_size,
165	DMA_BIDIRECTIONAL);
166
167	free_pages(addr: (unsigned long)sg_vaddr, order: 0);
168	if (dpaa2_sg_is_final(sg: &sgt[i]))
169	break;
170	}
171
172	free_buf:
173	free_pages(addr: (unsigned long)vaddr, order: 0);
174	}
175
176	/* Build a linear skb based on a single-buffer frame descriptor */
177	static struct sk_buff *dpaa2_eth_build_linear_skb(struct dpaa2_eth_channel *ch,
178	const struct dpaa2_fd *fd,
179	void *fd_vaddr)
180	{
181	struct sk_buff *skb = NULL;
182	u16 fd_offset = dpaa2_fd_get_offset(fd);
183	u32 fd_length = dpaa2_fd_get_len(fd);
184
185	ch->buf_count--;
186
187	skb = build_skb(data: fd_vaddr, DPAA2_ETH_RX_BUF_RAW_SIZE);
188	if (unlikely(!skb))
189	return NULL;
190
191	skb_reserve(skb, len: fd_offset);
192	skb_put(skb, len: fd_length);
193
194	return skb;
195	}
196
197	/* Build a non linear (fragmented) skb based on a S/G table */
198	static struct sk_buff *dpaa2_eth_build_frag_skb(struct dpaa2_eth_priv *priv,
199	struct dpaa2_eth_channel *ch,
200	struct dpaa2_sg_entry *sgt)
201	{
202	struct sk_buff *skb = NULL;
203	struct device *dev = priv->net_dev->dev.parent;
204	void *sg_vaddr;
205	dma_addr_t sg_addr;
206	u16 sg_offset;
207	u32 sg_length;
208	struct page *page, *head_page;
209	int page_offset;
210	int i;
211
212	for (i = 0; i < DPAA2_ETH_MAX_SG_ENTRIES; i++) {
213	struct dpaa2_sg_entry *sge = &sgt[i];
214
215	/* NOTE: We only support SG entries in dpaa2_sg_single format,
216	* but this is the only format we may receive from HW anyway
217	*/
218
219	/* Get the address and length from the S/G entry */
220	sg_addr = dpaa2_sg_get_addr(sg: sge);
221	sg_vaddr = dpaa2_iova_to_virt(domain: priv->iommu_domain, iova_addr: sg_addr);
222	dma_unmap_page(dev, sg_addr, priv->rx_buf_size,
223	DMA_BIDIRECTIONAL);
224
225	sg_length = dpaa2_sg_get_len(sg: sge);
226
227	if (i == 0) {
228	/* We build the skb around the first data buffer */
229	skb = build_skb(data: sg_vaddr, DPAA2_ETH_RX_BUF_RAW_SIZE);
230	if (unlikely(!skb)) {
231	/* Free the first SG entry now, since we already
232	* unmapped it and obtained the virtual address
233	*/
234	free_pages(addr: (unsigned long)sg_vaddr, order: 0);
235
236	/* We still need to subtract the buffers used
237	* by this FD from our software counter
238	*/
239	while (!dpaa2_sg_is_final(sg: &sgt[i]) &&
240	i < DPAA2_ETH_MAX_SG_ENTRIES)
241	i++;
242	break;
243	}
244
245	sg_offset = dpaa2_sg_get_offset(sg: sge);
246	skb_reserve(skb, len: sg_offset);
247	skb_put(skb, len: sg_length);
248	} else {
249	/* Rest of the data buffers are stored as skb frags */
250	page = virt_to_page(sg_vaddr);
251	head_page = virt_to_head_page(x: sg_vaddr);
252
253	/* Offset in page (which may be compound).
254	* Data in subsequent SG entries is stored from the
255	* beginning of the buffer, so we don't need to add the
256	* sg_offset.
257	*/
258	page_offset = ((unsigned long)sg_vaddr &
259	(PAGE_SIZE - 1)) +
260	(page_address(page) - page_address(head_page));
261
262	skb_add_rx_frag(skb, i: i - 1, page: head_page, off: page_offset,
263	size: sg_length, truesize: priv->rx_buf_size);
264	}
265
266	if (dpaa2_sg_is_final(sg: sge))
267	break;
268	}
269
270	WARN_ONCE(i == DPAA2_ETH_MAX_SG_ENTRIES, "Final bit not set in SGT");
271
272	/* Count all data buffers + SG table buffer */
273	ch->buf_count -= i + 2;
274
275	return skb;
276	}
277
278	/* Free buffers acquired from the buffer pool or which were meant to
279	* be released in the pool
280	*/
281	static void dpaa2_eth_free_bufs(struct dpaa2_eth_priv *priv, u64 *buf_array,
282	int count, bool xsk_zc)
283	{
284	struct device *dev = priv->net_dev->dev.parent;
285	struct dpaa2_eth_swa *swa;
286	struct xdp_buff *xdp_buff;
287	void *vaddr;
288	int i;
289
290	for (i = 0; i < count; i++) {
291	vaddr = dpaa2_iova_to_virt(domain: priv->iommu_domain, iova_addr: buf_array[i]);
292
293	if (!xsk_zc) {
294	dma_unmap_page(dev, buf_array[i], priv->rx_buf_size,
295	DMA_BIDIRECTIONAL);
296	free_pages(addr: (unsigned long)vaddr, order: 0);
297	} else {
298	swa = (struct dpaa2_eth_swa *)
299	(vaddr + DPAA2_ETH_RX_HWA_SIZE);
300	xdp_buff = swa->xsk.xdp_buff;
301	xsk_buff_free(xdp: xdp_buff);
302	}
303	}
304	}
305
306	void dpaa2_eth_recycle_buf(struct dpaa2_eth_priv *priv,
307	struct dpaa2_eth_channel *ch,
308	dma_addr_t addr)
309	{
310	int retries = 0;
311	int err;
312
313	ch->recycled_bufs[ch->recycled_bufs_cnt++] = addr;
314	if (ch->recycled_bufs_cnt < DPAA2_ETH_BUFS_PER_CMD)
315	return;
316
317	while ((err = dpaa2_io_service_release(d: ch->dpio, bpid: ch->bp->bpid,
318	buffers: ch->recycled_bufs,
319	num_buffers: ch->recycled_bufs_cnt)) == -EBUSY) {
320	if (retries++ >= DPAA2_ETH_SWP_BUSY_RETRIES)
321	break;
322	cpu_relax();
323	}
324
325	if (err) {
326	dpaa2_eth_free_bufs(priv, buf_array: ch->recycled_bufs,
327	count: ch->recycled_bufs_cnt, xsk_zc: ch->xsk_zc);
328	ch->buf_count -= ch->recycled_bufs_cnt;
329	}
330
331	ch->recycled_bufs_cnt = 0;
332	}
333
334	static int dpaa2_eth_xdp_flush(struct dpaa2_eth_priv *priv,
335	struct dpaa2_eth_fq *fq,
336	struct dpaa2_eth_xdp_fds *xdp_fds)
337	{
338	int total_enqueued = 0, retries = 0, enqueued;
339	struct dpaa2_eth_drv_stats *percpu_extras;
340	int num_fds, err, max_retries;
341	struct dpaa2_fd *fds;
342
343	percpu_extras = this_cpu_ptr(priv->percpu_extras);
344
345	/* try to enqueue all the FDs until the max number of retries is hit */
346	fds = xdp_fds->fds;
347	num_fds = xdp_fds->num;
348	max_retries = num_fds * DPAA2_ETH_ENQUEUE_RETRIES;
349	while (total_enqueued < num_fds && retries < max_retries) {
350	err = priv->enqueue(priv, fq, &fds[total_enqueued],
351	0, num_fds - total_enqueued, &enqueued);
352	if (err == -EBUSY) {
353	percpu_extras->tx_portal_busy += ++retries;
354	continue;
355	}
356	total_enqueued += enqueued;
357	}
358	xdp_fds->num = 0;
359
360	return total_enqueued;
361	}
362
363	static void dpaa2_eth_xdp_tx_flush(struct dpaa2_eth_priv *priv,
364	struct dpaa2_eth_channel *ch,
365	struct dpaa2_eth_fq *fq)
366	{
367	struct rtnl_link_stats64 *percpu_stats;
368	struct dpaa2_fd *fds;
369	int enqueued, i;
370
371	percpu_stats = this_cpu_ptr(priv->percpu_stats);
372
373	// enqueue the array of XDP_TX frames
374	enqueued = dpaa2_eth_xdp_flush(priv, fq, xdp_fds: &fq->xdp_tx_fds);
375
376	/* update statistics */
377	percpu_stats->tx_packets += enqueued;
378	fds = fq->xdp_tx_fds.fds;
379	for (i = 0; i < enqueued; i++) {
380	percpu_stats->tx_bytes += dpaa2_fd_get_len(fd: &fds[i]);
381	ch->stats.xdp_tx++;
382	}
383	for (i = enqueued; i < fq->xdp_tx_fds.num; i++) {
384	dpaa2_eth_recycle_buf(priv, ch, addr: dpaa2_fd_get_addr(fd: &fds[i]));
385	percpu_stats->tx_errors++;
386	ch->stats.xdp_tx_err++;
387	}
388	fq->xdp_tx_fds.num = 0;
389	}
390
391	void dpaa2_eth_xdp_enqueue(struct dpaa2_eth_priv *priv,
392	struct dpaa2_eth_channel *ch,
393	struct dpaa2_fd *fd,
394	void *buf_start, u16 queue_id)
395	{
396	struct dpaa2_faead *faead;
397	struct dpaa2_fd *dest_fd;
398	struct dpaa2_eth_fq *fq;
399	u32 ctrl, frc;
400
401	/* Mark the egress frame hardware annotation area as valid */
402	frc = dpaa2_fd_get_frc(fd);
403	dpaa2_fd_set_frc(fd, frc: frc | DPAA2_FD_FRC_FAEADV);
404	dpaa2_fd_set_ctrl(fd, DPAA2_FD_CTRL_ASAL);
405
406	/* Instruct hardware to release the FD buffer directly into
407	* the buffer pool once transmission is completed, instead of
408	* sending a Tx confirmation frame to us
409	*/
410	ctrl = DPAA2_FAEAD_A4V | DPAA2_FAEAD_A2V | DPAA2_FAEAD_EBDDV;
411	faead = dpaa2_get_faead(buf_addr: buf_start, swa: false);
412	faead->ctrl = cpu_to_le32(ctrl);
413	faead->conf_fqid = 0;
414
415	fq = &priv->fq[queue_id];
416	dest_fd = &fq->xdp_tx_fds.fds[fq->xdp_tx_fds.num++];
417	memcpy(dest_fd, fd, sizeof(*dest_fd));
418
419	if (fq->xdp_tx_fds.num < DEV_MAP_BULK_SIZE)
420	return;
421
422	dpaa2_eth_xdp_tx_flush(priv, ch, fq);
423	}
424
425	static u32 dpaa2_eth_run_xdp(struct dpaa2_eth_priv *priv,
426	struct dpaa2_eth_channel *ch,
427	struct dpaa2_eth_fq *rx_fq,
428	struct dpaa2_fd *fd, void *vaddr)
429	{
430	dma_addr_t addr = dpaa2_fd_get_addr(fd);
431	struct bpf_prog *xdp_prog;
432	struct xdp_buff xdp;
433	u32 xdp_act = XDP_PASS;
434	int err, offset;
435
436	xdp_prog = READ_ONCE(ch->xdp.prog);
437	if (!xdp_prog)
438	goto out;
439
440	offset = dpaa2_fd_get_offset(fd) - XDP_PACKET_HEADROOM;
441	xdp_init_buff(xdp: &xdp, DPAA2_ETH_RX_BUF_RAW_SIZE - offset, rxq: &ch->xdp_rxq);
442	xdp_prepare_buff(xdp: &xdp, hard_start: vaddr + offset, XDP_PACKET_HEADROOM,
443	data_len: dpaa2_fd_get_len(fd), meta_valid: false);
444
445	xdp_act = bpf_prog_run_xdp(prog: xdp_prog, xdp: &xdp);
446
447	/* xdp.data pointer may have changed */
448	dpaa2_fd_set_offset(fd, offset: xdp.data - vaddr);
449	dpaa2_fd_set_len(fd, len: xdp.data_end - xdp.data);
450
451	switch (xdp_act) {
452	case XDP_PASS:
453	break;
454	case XDP_TX:
455	dpaa2_eth_xdp_enqueue(priv, ch, fd, buf_start: vaddr, queue_id: rx_fq->flowid);
456	break;
457	default:
458	bpf_warn_invalid_xdp_action(dev: priv->net_dev, prog: xdp_prog, act: xdp_act);
459	fallthrough;
460	case XDP_ABORTED:
461	trace_xdp_exception(dev: priv->net_dev, xdp: xdp_prog, act: xdp_act);
462	fallthrough;
463	case XDP_DROP:
464	dpaa2_eth_recycle_buf(priv, ch, addr);
465	ch->stats.xdp_drop++;
466	break;
467	case XDP_REDIRECT:
468	dma_unmap_page(priv->net_dev->dev.parent, addr,
469	priv->rx_buf_size, DMA_BIDIRECTIONAL);
470	ch->buf_count--;
471
472	/* Allow redirect use of full headroom */
473	xdp.data_hard_start = vaddr;
474	xdp.frame_sz = DPAA2_ETH_RX_BUF_RAW_SIZE;
475
476	err = xdp_do_redirect(dev: priv->net_dev, xdp: &xdp, prog: xdp_prog);
477	if (unlikely(err)) {
478	addr = dma_map_page(priv->net_dev->dev.parent,
479	virt_to_page(vaddr), 0,
480	priv->rx_buf_size, DMA_BIDIRECTIONAL);
481	if (unlikely(dma_mapping_error(priv->net_dev->dev.parent, addr))) {
482	free_pages(addr: (unsigned long)vaddr, order: 0);
483	} else {
484	ch->buf_count++;
485	dpaa2_eth_recycle_buf(priv, ch, addr);
486	}
487	ch->stats.xdp_drop++;
488	} else {
489	ch->stats.xdp_redirect++;
490	}
491	break;
492	}
493
494	ch->xdp.res |= xdp_act;
495	out:
496	return xdp_act;
497	}
498
499	struct sk_buff *dpaa2_eth_alloc_skb(struct dpaa2_eth_priv *priv,
500	struct dpaa2_eth_channel *ch,
501	const struct dpaa2_fd *fd, u32 fd_length,
502	void *fd_vaddr)
503	{
504	u16 fd_offset = dpaa2_fd_get_offset(fd);
505	struct sk_buff *skb = NULL;
506	unsigned int skb_len;
507
508	skb_len = fd_length + dpaa2_eth_needed_headroom(NULL);
509
510	skb = napi_alloc_skb(napi: &ch->napi, length: skb_len);
511	if (!skb)
512	return NULL;
513
514	skb_reserve(skb, len: dpaa2_eth_needed_headroom(NULL));
515	skb_put(skb, len: fd_length);
516
517	memcpy(skb->data, fd_vaddr + fd_offset, fd_length);
518
519	return skb;
520	}
521
522	static struct sk_buff *dpaa2_eth_copybreak(struct dpaa2_eth_channel *ch,
523	const struct dpaa2_fd *fd,
524	void *fd_vaddr)
525	{
526	struct dpaa2_eth_priv *priv = ch->priv;
527	u32 fd_length = dpaa2_fd_get_len(fd);
528
529	if (fd_length > priv->rx_copybreak)
530	return NULL;
531
532	return dpaa2_eth_alloc_skb(priv, ch, fd, fd_length, fd_vaddr);
533	}
534
535	void dpaa2_eth_receive_skb(struct dpaa2_eth_priv *priv,
536	struct dpaa2_eth_channel *ch,
537	const struct dpaa2_fd *fd, void *vaddr,
538	struct dpaa2_eth_fq *fq,
539	struct rtnl_link_stats64 *percpu_stats,
540	struct sk_buff *skb)
541	{
542	struct dpaa2_fas *fas;
543	u32 status = 0;
544
545	fas = dpaa2_get_fas(buf_addr: vaddr, swa: false);
546	prefetch(fas);
547	prefetch(skb->data);
548
549	/* Get the timestamp value */
550	if (priv->rx_tstamp) {
551	struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb);
552	__le64 *ts = dpaa2_get_ts(buf_addr: vaddr, swa: false);
553	u64 ns;
554
555	memset(shhwtstamps, 0, sizeof(*shhwtstamps));
556
557	ns = DPAA2_PTP_CLK_PERIOD_NS * le64_to_cpup(p: ts);
558	shhwtstamps->hwtstamp = ns_to_ktime(ns);
559	}
560
561	/* Check if we need to validate the L4 csum */
562	if (likely(dpaa2_fd_get_frc(fd) & DPAA2_FD_FRC_FASV)) {
563	status = le32_to_cpu(fas->status);
564	dpaa2_eth_validate_rx_csum(priv, fd_status: status, skb);
565	}
566
567	skb->protocol = eth_type_trans(skb, dev: priv->net_dev);
568	skb_record_rx_queue(skb, rx_queue: fq->flowid);
569
570	percpu_stats->rx_packets++;
571	percpu_stats->rx_bytes += dpaa2_fd_get_len(fd);
572	ch->stats.bytes_per_cdan += dpaa2_fd_get_len(fd);
573
574	list_add_tail(new: &skb->list, head: ch->rx_list);
575	}
576
577	/* Main Rx frame processing routine */
578	void dpaa2_eth_rx(struct dpaa2_eth_priv *priv,
579	struct dpaa2_eth_channel *ch,
580	const struct dpaa2_fd *fd,
581	struct dpaa2_eth_fq *fq)
582	{
583	dma_addr_t addr = dpaa2_fd_get_addr(fd);
584	u8 fd_format = dpaa2_fd_get_format(fd);
585	void *vaddr;
586	struct sk_buff *skb;
587	struct rtnl_link_stats64 *percpu_stats;
588	struct dpaa2_eth_drv_stats *percpu_extras;
589	struct device *dev = priv->net_dev->dev.parent;
590	bool recycle_rx_buf = false;
591	void *buf_data;
592	u32 xdp_act;
593
594	/* Tracing point */
595	trace_dpaa2_rx_fd(netdev: priv->net_dev, fd);
596
597	vaddr = dpaa2_iova_to_virt(domain: priv->iommu_domain, iova_addr: addr);
598	dma_sync_single_for_cpu(dev, addr, size: priv->rx_buf_size,
599	dir: DMA_BIDIRECTIONAL);
600
601	buf_data = vaddr + dpaa2_fd_get_offset(fd);
602	prefetch(buf_data);
603
604	percpu_stats = this_cpu_ptr(priv->percpu_stats);
605	percpu_extras = this_cpu_ptr(priv->percpu_extras);
606
607	if (fd_format == dpaa2_fd_single) {
608	xdp_act = dpaa2_eth_run_xdp(priv, ch, rx_fq: fq, fd: (struct dpaa2_fd *)fd, vaddr);
609	if (xdp_act != XDP_PASS) {
610	percpu_stats->rx_packets++;
611	percpu_stats->rx_bytes += dpaa2_fd_get_len(fd);
612	return;
613	}
614
615	skb = dpaa2_eth_copybreak(ch, fd, fd_vaddr: vaddr);
616	if (!skb) {
617	dma_unmap_page(dev, addr, priv->rx_buf_size,
618	DMA_BIDIRECTIONAL);
619	skb = dpaa2_eth_build_linear_skb(ch, fd, fd_vaddr: vaddr);
620	} else {
621	recycle_rx_buf = true;
622	}
623	} else if (fd_format == dpaa2_fd_sg) {
624	WARN_ON(priv->xdp_prog);
625
626	dma_unmap_page(dev, addr, priv->rx_buf_size,
627	DMA_BIDIRECTIONAL);
628	skb = dpaa2_eth_build_frag_skb(priv, ch, sgt: buf_data);
629	free_pages(addr: (unsigned long)vaddr, order: 0);
630	percpu_extras->rx_sg_frames++;
631	percpu_extras->rx_sg_bytes += dpaa2_fd_get_len(fd);
632	} else {
633	/* We don't support any other format */
634	goto err_frame_format;
635	}
636
637	if (unlikely(!skb))
638	goto err_build_skb;
639
640	dpaa2_eth_receive_skb(priv, ch, fd, vaddr, fq, percpu_stats, skb);
641
642	if (recycle_rx_buf)
643	dpaa2_eth_recycle_buf(priv, ch, addr: dpaa2_fd_get_addr(fd));
644	return;
645
646	err_build_skb:
647	dpaa2_eth_free_rx_fd(priv, fd, vaddr);
648	err_frame_format:
649	percpu_stats->rx_dropped++;
650	}
651
652	/* Processing of Rx frames received on the error FQ
653	* We check and print the error bits and then free the frame
654	*/
655	static void dpaa2_eth_rx_err(struct dpaa2_eth_priv *priv,
656	struct dpaa2_eth_channel *ch,
657	const struct dpaa2_fd *fd,
658	struct dpaa2_eth_fq *fq __always_unused)
659	{
660	struct device *dev = priv->net_dev->dev.parent;
661	dma_addr_t addr = dpaa2_fd_get_addr(fd);
662	u8 fd_format = dpaa2_fd_get_format(fd);
663	struct rtnl_link_stats64 *percpu_stats;
664	struct dpaa2_eth_trap_item *trap_item;
665	struct dpaa2_fapr *fapr;
666	struct sk_buff *skb;
667	void *buf_data;
668	void *vaddr;
669
670	vaddr = dpaa2_iova_to_virt(domain: priv->iommu_domain, iova_addr: addr);
671	dma_sync_single_for_cpu(dev, addr, size: priv->rx_buf_size,
672	dir: DMA_BIDIRECTIONAL);
673
674	buf_data = vaddr + dpaa2_fd_get_offset(fd);
675
676	if (fd_format == dpaa2_fd_single) {
677	dma_unmap_page(dev, addr, priv->rx_buf_size,
678	DMA_BIDIRECTIONAL);
679	skb = dpaa2_eth_build_linear_skb(ch, fd, fd_vaddr: vaddr);
680	} else if (fd_format == dpaa2_fd_sg) {
681	dma_unmap_page(dev, addr, priv->rx_buf_size,
682	DMA_BIDIRECTIONAL);
683	skb = dpaa2_eth_build_frag_skb(priv, ch, sgt: buf_data);
684	free_pages(addr: (unsigned long)vaddr, order: 0);
685	} else {
686	/* We don't support any other format */
687	dpaa2_eth_free_rx_fd(priv, fd, vaddr);
688	goto err_frame_format;
689	}
690
691	fapr = dpaa2_get_fapr(buf_addr: vaddr, swa: false);
692	trap_item = dpaa2_eth_dl_get_trap(priv, fapr);
693	if (trap_item)
694	devlink_trap_report(devlink: priv->devlink, skb, trap_ctx: trap_item->trap_ctx,
695	in_devlink_port: &priv->devlink_port, NULL);
696	consume_skb(skb);
697
698	err_frame_format:
699	percpu_stats = this_cpu_ptr(priv->percpu_stats);
700	percpu_stats->rx_errors++;
701	ch->buf_count--;
702	}
703
704	/* Consume all frames pull-dequeued into the store. This is the simplest way to
705	* make sure we don't accidentally issue another volatile dequeue which would
706	* overwrite (leak) frames already in the store.
707	*
708	* Observance of NAPI budget is not our concern, leaving that to the caller.
709	*/
710	static int dpaa2_eth_consume_frames(struct dpaa2_eth_channel *ch,
711	struct dpaa2_eth_fq **src)
712	{
713	struct dpaa2_eth_priv *priv = ch->priv;
714	struct dpaa2_eth_fq *fq = NULL;
715	struct dpaa2_dq *dq;
716	const struct dpaa2_fd *fd;
717	int cleaned = 0, retries = 0;
718	int is_last;
719
720	do {
721	dq = dpaa2_io_store_next(s: ch->store, is_last: &is_last);
722	if (unlikely(!dq)) {
723	/* If we're here, we *must* have placed a
724	* volatile dequeue comnmand, so keep reading through
725	* the store until we get some sort of valid response
726	* token (either a valid frame or an "empty dequeue")
727	*/
728	if (retries++ >= DPAA2_ETH_SWP_BUSY_RETRIES) {
729	netdev_err_once(priv->net_dev,
730	"Unable to read a valid dequeue response\n");
731	return -ETIMEDOUT;
732	}
733	continue;
734	}
735
736	fd = dpaa2_dq_fd(dq);
737	fq = (struct dpaa2_eth_fq *)(uintptr_t)dpaa2_dq_fqd_ctx(dq);
738
739	fq->consume(priv, ch, fd, fq);
740	cleaned++;
741	retries = 0;
742	} while (!is_last);
743
744	if (!cleaned)
745	return 0;
746
747	fq->stats.frames += cleaned;
748	ch->stats.frames += cleaned;
749	ch->stats.frames_per_cdan += cleaned;
750
751	/* A dequeue operation only pulls frames from a single queue
752	* into the store. Return the frame queue as an out param.
753	*/
754	if (src)
755	*src = fq;
756
757	return cleaned;
758	}
759
760	static int dpaa2_eth_ptp_parse(struct sk_buff *skb,
761	u8 *msgtype, u8 *twostep, u8 *udp,
762	u16 *correction_offset,
763	u16 *origintimestamp_offset)
764	{
765	unsigned int ptp_class;
766	struct ptp_header *hdr;
767	unsigned int type;
768	u8 *base;
769
770	ptp_class = ptp_classify_raw(skb);
771	if (ptp_class == PTP_CLASS_NONE)
772	return -EINVAL;
773
774	hdr = ptp_parse_header(skb, type: ptp_class);
775	if (!hdr)
776	return -EINVAL;
777
778	*msgtype = ptp_get_msgtype(hdr, type: ptp_class);
779	*twostep = hdr->flag_field[0] & 0x2;
780
781	type = ptp_class & PTP_CLASS_PMASK;
782	if (type == PTP_CLASS_IPV4 ||
783	type == PTP_CLASS_IPV6)
784	*udp = 1;
785	else
786	*udp = 0;
787
788	base = skb_mac_header(skb);
789	*correction_offset = (u8 *)&hdr->correction - base;
790	*origintimestamp_offset = (u8 *)hdr + sizeof(struct ptp_header) - base;
791
792	return 0;
793	}
794
795	/* Configure the egress frame annotation for timestamp update */
796	static void dpaa2_eth_enable_tx_tstamp(struct dpaa2_eth_priv *priv,
797	struct dpaa2_fd *fd,
798	void *buf_start,
799	struct sk_buff *skb)
800	{
801	struct ptp_tstamp origin_timestamp;
802	u8 msgtype, twostep, udp;
803	struct dpaa2_faead *faead;
804	struct dpaa2_fas *fas;
805	struct timespec64 ts;
806	u16 offset1, offset2;
807	u32 ctrl, frc;
808	__le64 *ns;
809	u8 *data;
810
811	/* Mark the egress frame annotation area as valid */
812	frc = dpaa2_fd_get_frc(fd);
813	dpaa2_fd_set_frc(fd, frc: frc | DPAA2_FD_FRC_FAEADV);
814
815	/* Set hardware annotation size */
816	ctrl = dpaa2_fd_get_ctrl(fd);
817	dpaa2_fd_set_ctrl(fd, ctrl: ctrl | DPAA2_FD_CTRL_ASAL);
818
819	/* enable UPD (update prepanded data) bit in FAEAD field of
820	* hardware frame annotation area
821	*/
822	ctrl = DPAA2_FAEAD_A2V | DPAA2_FAEAD_UPDV | DPAA2_FAEAD_UPD;
823	faead = dpaa2_get_faead(buf_addr: buf_start, swa: true);
824	faead->ctrl = cpu_to_le32(ctrl);
825
826	if (skb->cb[0] == TX_TSTAMP_ONESTEP_SYNC) {
827	if (dpaa2_eth_ptp_parse(skb, msgtype: &msgtype, twostep: &twostep, udp: &udp,
828	correction_offset: &offset1, origintimestamp_offset: &offset2) ||
829	msgtype != PTP_MSGTYPE_SYNC || twostep) {
830	WARN_ONCE(1, "Bad packet for one-step timestamping\n");
831	return;
832	}
833
834	/* Mark the frame annotation status as valid */
835	frc = dpaa2_fd_get_frc(fd);
836	dpaa2_fd_set_frc(fd, frc: frc | DPAA2_FD_FRC_FASV);
837
838	/* Mark the PTP flag for one step timestamping */
839	fas = dpaa2_get_fas(buf_addr: buf_start, swa: true);
840	fas->status = cpu_to_le32(DPAA2_FAS_PTP);
841
842	dpaa2_ptp->caps.gettime64(&dpaa2_ptp->caps, &ts);
843	ns = dpaa2_get_ts(buf_addr: buf_start, swa: true);
844	*ns = cpu_to_le64(timespec64_to_ns(&ts) /
845	DPAA2_PTP_CLK_PERIOD_NS);
846
847	/* Update current time to PTP message originTimestamp field */
848	ns_to_ptp_tstamp(tstamp: &origin_timestamp, le64_to_cpup(p: ns));
849	data = skb_mac_header(skb);
850	*(__be16 *)(data + offset2) = htons(origin_timestamp.sec_msb);
851	*(__be32 *)(data + offset2 + 2) =
852	htonl(origin_timestamp.sec_lsb);
853	*(__be32 *)(data + offset2 + 6) = htonl(origin_timestamp.nsec);
854
855	if (priv->ptp_correction_off == offset1)
856	return;
857
858	priv->dpaa2_set_onestep_params_cb(priv, offset1, udp);
859	priv->ptp_correction_off = offset1;
860
861	}
862	}
863
864	void *dpaa2_eth_sgt_get(struct dpaa2_eth_priv *priv)
865	{
866	struct dpaa2_eth_sgt_cache *sgt_cache;
867	void *sgt_buf = NULL;
868	int sgt_buf_size;
869
870	sgt_cache = this_cpu_ptr(priv->sgt_cache);
871	sgt_buf_size = priv->tx_data_offset +
872	DPAA2_ETH_SG_ENTRIES_MAX * sizeof(struct dpaa2_sg_entry);
873
874	if (sgt_cache->count == 0)
875	sgt_buf = napi_alloc_frag_align(fragsz: sgt_buf_size, DPAA2_ETH_TX_BUF_ALIGN);
876	else
877	sgt_buf = sgt_cache->buf[--sgt_cache->count];
878	if (!sgt_buf)
879	return NULL;
880
881	memset(sgt_buf, 0, sgt_buf_size);
882
883	return sgt_buf;
884	}
885
886	void dpaa2_eth_sgt_recycle(struct dpaa2_eth_priv *priv, void *sgt_buf)
887	{
888	struct dpaa2_eth_sgt_cache *sgt_cache;
889
890	sgt_cache = this_cpu_ptr(priv->sgt_cache);
891	if (sgt_cache->count >= DPAA2_ETH_SGT_CACHE_SIZE)
892	skb_free_frag(addr: sgt_buf);
893	else
894	sgt_cache->buf[sgt_cache->count++] = sgt_buf;
895	}
896
897	/* Create a frame descriptor based on a fragmented skb */
898	static int dpaa2_eth_build_sg_fd(struct dpaa2_eth_priv *priv,
899	struct sk_buff *skb,
900	struct dpaa2_fd *fd,
901	void **swa_addr)
902	{
903	struct device *dev = priv->net_dev->dev.parent;
904	void *sgt_buf = NULL;
905	dma_addr_t addr;
906	int nr_frags = skb_shinfo(skb)->nr_frags;
907	struct dpaa2_sg_entry *sgt;
908	int i, err;
909	int sgt_buf_size;
910	struct scatterlist *scl, *crt_scl;
911	int num_sg;
912	int num_dma_bufs;
913	struct dpaa2_eth_swa *swa;
914
915	/* Create and map scatterlist.
916	* We don't advertise NETIF_F_FRAGLIST, so skb_to_sgvec() will not have
917	* to go beyond nr_frags+1.
918	* Note: We don't support chained scatterlists
919	*/
920	if (unlikely(PAGE_SIZE / sizeof(struct scatterlist) < nr_frags + 1))
921	return -EINVAL;
922
923	scl = kmalloc_array(n: nr_frags + 1, size: sizeof(struct scatterlist), GFP_ATOMIC);
924	if (unlikely(!scl))
925	return -ENOMEM;
926
927	sg_init_table(scl, nr_frags + 1);
928	num_sg = skb_to_sgvec(skb, sg: scl, offset: 0, len: skb->len);
929	if (unlikely(num_sg < 0)) {
930	err = -ENOMEM;
931	goto dma_map_sg_failed;
932	}
933	num_dma_bufs = dma_map_sg(dev, scl, num_sg, DMA_BIDIRECTIONAL);
934	if (unlikely(!num_dma_bufs)) {
935	err = -ENOMEM;
936	goto dma_map_sg_failed;
937	}
938
939	/* Prepare the HW SGT structure */
940	sgt_buf_size = priv->tx_data_offset +
941	sizeof(struct dpaa2_sg_entry) * num_dma_bufs;
942	sgt_buf = dpaa2_eth_sgt_get(priv);
943	if (unlikely(!sgt_buf)) {
944	err = -ENOMEM;
945	goto sgt_buf_alloc_failed;
946	}
947
948	sgt = (struct dpaa2_sg_entry *)(sgt_buf + priv->tx_data_offset);
949
950	/* Fill in the HW SGT structure.
951	*
952	* sgt_buf is zeroed out, so the following fields are implicit
953	* in all sgt entries:
954	* - offset is 0
955	* - format is 'dpaa2_sg_single'
956	*/
957	for_each_sg(scl, crt_scl, num_dma_bufs, i) {
958	dpaa2_sg_set_addr(sg: &sgt[i], sg_dma_address(crt_scl));
959	dpaa2_sg_set_len(sg: &sgt[i], sg_dma_len(crt_scl));
960	}
961	dpaa2_sg_set_final(sg: &sgt[i - 1], final: true);
962
963	/* Store the skb backpointer in the SGT buffer.
964	* Fit the scatterlist and the number of buffers alongside the
965	* skb backpointer in the software annotation area. We'll need
966	* all of them on Tx Conf.
967	*/
968	*swa_addr = (void *)sgt_buf;
969	swa = (struct dpaa2_eth_swa *)sgt_buf;
970	swa->type = DPAA2_ETH_SWA_SG;
971	swa->sg.skb = skb;
972	swa->sg.scl = scl;
973	swa->sg.num_sg = num_sg;
974	swa->sg.sgt_size = sgt_buf_size;
975
976	/* Separately map the SGT buffer */
977	addr = dma_map_single(dev, sgt_buf, sgt_buf_size, DMA_BIDIRECTIONAL);
978	if (unlikely(dma_mapping_error(dev, addr))) {
979	err = -ENOMEM;
980	goto dma_map_single_failed;
981	}
982	memset(fd, 0, sizeof(struct dpaa2_fd));
983	dpaa2_fd_set_offset(fd, offset: priv->tx_data_offset);
984	dpaa2_fd_set_format(fd, format: dpaa2_fd_sg);
985	dpaa2_fd_set_addr(fd, addr);
986	dpaa2_fd_set_len(fd, len: skb->len);
987	dpaa2_fd_set_ctrl(fd, FD_CTRL_PTA);
988
989	return 0;
990
991	dma_map_single_failed:
992	dpaa2_eth_sgt_recycle(priv, sgt_buf);
993	sgt_buf_alloc_failed:
994	dma_unmap_sg(dev, scl, num_sg, DMA_BIDIRECTIONAL);
995	dma_map_sg_failed:
996	kfree(objp: scl);
997	return err;
998	}
999
1000	/* Create a SG frame descriptor based on a linear skb.
1001	*
1002	* This function is used on the Tx path when the skb headroom is not large
1003	* enough for the HW requirements, thus instead of realloc-ing the skb we
1004	* create a SG frame descriptor with only one entry.
1005	*/
1006	static int dpaa2_eth_build_sg_fd_single_buf(struct dpaa2_eth_priv *priv,
1007	struct sk_buff *skb,
1008	struct dpaa2_fd *fd,
1009	void **swa_addr)
1010	{
1011	struct device *dev = priv->net_dev->dev.parent;
1012	struct dpaa2_sg_entry *sgt;
1013	struct dpaa2_eth_swa *swa;
1014	dma_addr_t addr, sgt_addr;
1015	void *sgt_buf = NULL;
1016	int sgt_buf_size;
1017	int err;
1018
1019	/* Prepare the HW SGT structure */
1020	sgt_buf_size = priv->tx_data_offset + sizeof(struct dpaa2_sg_entry);
1021	sgt_buf = dpaa2_eth_sgt_get(priv);
1022	if (unlikely(!sgt_buf))
1023	return -ENOMEM;
1024	sgt = (struct dpaa2_sg_entry *)(sgt_buf + priv->tx_data_offset);
1025
1026	addr = dma_map_single(dev, skb->data, skb->len, DMA_BIDIRECTIONAL);
1027	if (unlikely(dma_mapping_error(dev, addr))) {
1028	err = -ENOMEM;
1029	goto data_map_failed;
1030	}
1031
1032	/* Fill in the HW SGT structure */
1033	dpaa2_sg_set_addr(sg: sgt, addr);
1034	dpaa2_sg_set_len(sg: sgt, len: skb->len);
1035	dpaa2_sg_set_final(sg: sgt, final: true);
1036
1037	/* Store the skb backpointer in the SGT buffer */
1038	*swa_addr = (void *)sgt_buf;
1039	swa = (struct dpaa2_eth_swa *)sgt_buf;
1040	swa->type = DPAA2_ETH_SWA_SINGLE;
1041	swa->single.skb = skb;
1042	swa->single.sgt_size = sgt_buf_size;
1043
1044	/* Separately map the SGT buffer */
1045	sgt_addr = dma_map_single(dev, sgt_buf, sgt_buf_size, DMA_BIDIRECTIONAL);
1046	if (unlikely(dma_mapping_error(dev, sgt_addr))) {
1047	err = -ENOMEM;
1048	goto sgt_map_failed;
1049	}
1050
1051	memset(fd, 0, sizeof(struct dpaa2_fd));
1052	dpaa2_fd_set_offset(fd, offset: priv->tx_data_offset);
1053	dpaa2_fd_set_format(fd, format: dpaa2_fd_sg);
1054	dpaa2_fd_set_addr(fd, addr: sgt_addr);
1055	dpaa2_fd_set_len(fd, len: skb->len);
1056	dpaa2_fd_set_ctrl(fd, FD_CTRL_PTA);
1057
1058	return 0;
1059
1060	sgt_map_failed:
1061	dma_unmap_single(dev, addr, skb->len, DMA_BIDIRECTIONAL);
1062	data_map_failed:
1063	dpaa2_eth_sgt_recycle(priv, sgt_buf);
1064
1065	return err;
1066	}
1067
1068	/* Create a frame descriptor based on a linear skb */
1069	static int dpaa2_eth_build_single_fd(struct dpaa2_eth_priv *priv,
1070	struct sk_buff *skb,
1071	struct dpaa2_fd *fd,
1072	void **swa_addr)
1073	{
1074	struct device *dev = priv->net_dev->dev.parent;
1075	u8 *buffer_start, *aligned_start;
1076	struct dpaa2_eth_swa *swa;
1077	dma_addr_t addr;
1078
1079	buffer_start = skb->data - dpaa2_eth_needed_headroom(skb);
1080	aligned_start = PTR_ALIGN(buffer_start - DPAA2_ETH_TX_BUF_ALIGN,
1081	DPAA2_ETH_TX_BUF_ALIGN);
1082	if (aligned_start >= skb->head)
1083	buffer_start = aligned_start;
1084	else
1085	return -ENOMEM;
1086
1087	/* Store a backpointer to the skb at the beginning of the buffer
1088	* (in the private data area) such that we can release it
1089	* on Tx confirm
1090	*/
1091	*swa_addr = (void *)buffer_start;
1092	swa = (struct dpaa2_eth_swa *)buffer_start;
1093	swa->type = DPAA2_ETH_SWA_SINGLE;
1094	swa->single.skb = skb;
1095
1096	addr = dma_map_single(dev, buffer_start,
1097	skb_tail_pointer(skb) - buffer_start,
1098	DMA_BIDIRECTIONAL);
1099	if (unlikely(dma_mapping_error(dev, addr)))
1100	return -ENOMEM;
1101
1102	memset(fd, 0, sizeof(struct dpaa2_fd));
1103	dpaa2_fd_set_addr(fd, addr);
1104	dpaa2_fd_set_offset(fd, offset: (u16)(skb->data - buffer_start));
1105	dpaa2_fd_set_len(fd, len: skb->len);
1106	dpaa2_fd_set_format(fd, format: dpaa2_fd_single);
1107	dpaa2_fd_set_ctrl(fd, FD_CTRL_PTA);
1108
1109	return 0;
1110	}
1111
1112	/* FD freeing routine on the Tx path
1113	*
1114	* DMA-unmap and free FD and possibly SGT buffer allocated on Tx. The skb
1115	* back-pointed to is also freed.
1116	* This can be called either from dpaa2_eth_tx_conf() or on the error path of
1117	* dpaa2_eth_tx().
1118	*/
1119	void dpaa2_eth_free_tx_fd(struct dpaa2_eth_priv *priv,
1120	struct dpaa2_eth_channel *ch,
1121	struct dpaa2_eth_fq *fq,
1122	const struct dpaa2_fd *fd, bool in_napi)
1123	{
1124	struct device *dev = priv->net_dev->dev.parent;
1125	dma_addr_t fd_addr, sg_addr;
1126	struct sk_buff *skb = NULL;
1127	unsigned char *buffer_start;
1128	struct dpaa2_eth_swa *swa;
1129	u8 fd_format = dpaa2_fd_get_format(fd);
1130	u32 fd_len = dpaa2_fd_get_len(fd);
1131	struct dpaa2_sg_entry *sgt;
1132	int should_free_skb = 1;
1133	void *tso_hdr;
1134	int i;
1135
1136	fd_addr = dpaa2_fd_get_addr(fd);
1137	buffer_start = dpaa2_iova_to_virt(domain: priv->iommu_domain, iova_addr: fd_addr);
1138	swa = (struct dpaa2_eth_swa *)buffer_start;
1139
1140	if (fd_format == dpaa2_fd_single) {
1141	if (swa->type == DPAA2_ETH_SWA_SINGLE) {
1142	skb = swa->single.skb;
1143	/* Accessing the skb buffer is safe before dma unmap,
1144	* because we didn't map the actual skb shell.
1145	*/
1146	dma_unmap_single(dev, fd_addr,
1147	skb_tail_pointer(skb) - buffer_start,
1148	DMA_BIDIRECTIONAL);
1149	} else {
1150	WARN_ONCE(swa->type != DPAA2_ETH_SWA_XDP, "Wrong SWA type");
1151	dma_unmap_single(dev, fd_addr, swa->xdp.dma_size,
1152	DMA_BIDIRECTIONAL);
1153	}
1154	} else if (fd_format == dpaa2_fd_sg) {
1155	if (swa->type == DPAA2_ETH_SWA_SG) {
1156	skb = swa->sg.skb;
1157
1158	/* Unmap the scatterlist */
1159	dma_unmap_sg(dev, swa->sg.scl, swa->sg.num_sg,
1160	DMA_BIDIRECTIONAL);
1161	kfree(objp: swa->sg.scl);
1162
1163	/* Unmap the SGT buffer */
1164	dma_unmap_single(dev, fd_addr, swa->sg.sgt_size,
1165	DMA_BIDIRECTIONAL);
1166	} else if (swa->type == DPAA2_ETH_SWA_SW_TSO) {
1167	skb = swa->tso.skb;
1168
1169	sgt = (struct dpaa2_sg_entry *)(buffer_start +
1170	priv->tx_data_offset);
1171
1172	/* Unmap the SGT buffer */
1173	dma_unmap_single(dev, fd_addr, swa->tso.sgt_size,
1174	DMA_BIDIRECTIONAL);
1175
1176	/* Unmap and free the header */
1177	tso_hdr = dpaa2_iova_to_virt(domain: priv->iommu_domain, iova_addr: dpaa2_sg_get_addr(sg: sgt));
1178	dma_unmap_single(dev, dpaa2_sg_get_addr(sgt), TSO_HEADER_SIZE,
1179	DMA_TO_DEVICE);
1180	kfree(objp: tso_hdr);
1181
1182	/* Unmap the other SG entries for the data */
1183	for (i = 1; i < swa->tso.num_sg; i++)
1184	dma_unmap_single(dev, dpaa2_sg_get_addr(&sgt[i]),
1185	dpaa2_sg_get_len(&sgt[i]), DMA_TO_DEVICE);
1186
1187	if (!swa->tso.is_last_fd)
1188	should_free_skb = 0;
1189	} else if (swa->type == DPAA2_ETH_SWA_XSK) {
1190	/* Unmap the SGT Buffer */
1191	dma_unmap_single(dev, fd_addr, swa->xsk.sgt_size,
1192	DMA_BIDIRECTIONAL);
1193	} else {
1194	skb = swa->single.skb;
1195
1196	/* Unmap the SGT Buffer */
1197	dma_unmap_single(dev, fd_addr, swa->single.sgt_size,
1198	DMA_BIDIRECTIONAL);
1199
1200	sgt = (struct dpaa2_sg_entry *)(buffer_start +
1201	priv->tx_data_offset);
1202	sg_addr = dpaa2_sg_get_addr(sg: sgt);
1203	dma_unmap_single(dev, sg_addr, skb->len, DMA_BIDIRECTIONAL);
1204	}
1205	} else {
1206	netdev_dbg(priv->net_dev, "Invalid FD format\n");
1207	return;
1208	}
1209
1210	if (swa->type == DPAA2_ETH_SWA_XSK) {
1211	ch->xsk_tx_pkts_sent++;
1212	dpaa2_eth_sgt_recycle(priv, sgt_buf: buffer_start);
1213	return;
1214	}
1215
1216	if (swa->type != DPAA2_ETH_SWA_XDP && in_napi) {
1217	fq->dq_frames++;
1218	fq->dq_bytes += fd_len;
1219	}
1220
1221	if (swa->type == DPAA2_ETH_SWA_XDP) {
1222	xdp_return_frame(xdpf: swa->xdp.xdpf);
1223	return;
1224	}
1225
1226	/* Get the timestamp value */
1227	if (swa->type != DPAA2_ETH_SWA_SW_TSO) {
1228	if (skb->cb[0] == TX_TSTAMP) {
1229	struct skb_shared_hwtstamps shhwtstamps;
1230	__le64 *ts = dpaa2_get_ts(buf_addr: buffer_start, swa: true);
1231	u64 ns;
1232
1233	memset(&shhwtstamps, 0, sizeof(shhwtstamps));
1234
1235	ns = DPAA2_PTP_CLK_PERIOD_NS * le64_to_cpup(p: ts);
1236	shhwtstamps.hwtstamp = ns_to_ktime(ns);
1237	skb_tstamp_tx(orig_skb: skb, hwtstamps: &shhwtstamps);
1238	} else if (skb->cb[0] == TX_TSTAMP_ONESTEP_SYNC) {
1239	mutex_unlock(lock: &priv->onestep_tstamp_lock);
1240	}
1241	}
1242
1243	/* Free SGT buffer allocated on tx */
1244	if (fd_format != dpaa2_fd_single)
1245	dpaa2_eth_sgt_recycle(priv, sgt_buf: buffer_start);
1246
1247	/* Move on with skb release. If we are just confirming multiple FDs
1248	* from the same TSO skb then only the last one will need to free the
1249	* skb.
1250	*/
1251	if (should_free_skb)
1252	napi_consume_skb(skb, budget: in_napi);
1253	}
1254
1255	static int dpaa2_eth_build_gso_fd(struct dpaa2_eth_priv *priv,
1256	struct sk_buff *skb, struct dpaa2_fd *fd,
1257	int *num_fds, u32 *total_fds_len)
1258	{
1259	struct device *dev = priv->net_dev->dev.parent;
1260	int hdr_len, total_len, data_left, fd_len;
1261	int num_sge, err, i, sgt_buf_size;
1262	struct dpaa2_fd *fd_start = fd;
1263	struct dpaa2_sg_entry *sgt;
1264	struct dpaa2_eth_swa *swa;
1265	dma_addr_t sgt_addr, addr;
1266	dma_addr_t tso_hdr_dma;
1267	unsigned int index = 0;
1268	struct tso_t tso;
1269	char *tso_hdr;
1270	void *sgt_buf;
1271
1272	/* Initialize the TSO handler, and prepare the first payload */
1273	hdr_len = tso_start(skb, tso: &tso);
1274	*total_fds_len = 0;
1275
1276	total_len = skb->len - hdr_len;
1277	while (total_len > 0) {
1278	/* Prepare the HW SGT structure for this frame */
1279	sgt_buf = dpaa2_eth_sgt_get(priv);
1280	if (unlikely(!sgt_buf)) {
1281	netdev_err(dev: priv->net_dev, format: "dpaa2_eth_sgt_get() failed\n");
1282	err = -ENOMEM;
1283	goto err_sgt_get;
1284	}
1285	sgt = (struct dpaa2_sg_entry *)(sgt_buf + priv->tx_data_offset);
1286
1287	/* Determine the data length of this frame */
1288	data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len);
1289	total_len -= data_left;
1290	fd_len = data_left + hdr_len;
1291
1292	/* Prepare packet headers: MAC + IP + TCP */
1293	tso_hdr = kmalloc(TSO_HEADER_SIZE, GFP_ATOMIC);
1294	if (!tso_hdr) {
1295	err = -ENOMEM;
1296	goto err_alloc_tso_hdr;
1297	}
1298
1299	tso_build_hdr(skb, hdr: tso_hdr, tso: &tso, size: data_left, is_last: total_len == 0);
1300	tso_hdr_dma = dma_map_single(dev, tso_hdr, TSO_HEADER_SIZE, DMA_TO_DEVICE);
1301	if (dma_mapping_error(dev, dma_addr: tso_hdr_dma)) {
1302	netdev_err(dev: priv->net_dev, format: "dma_map_single(tso_hdr) failed\n");
1303	err = -ENOMEM;
1304	goto err_map_tso_hdr;
1305	}
1306
1307	/* Setup the SG entry for the header */
1308	dpaa2_sg_set_addr(sg: sgt, addr: tso_hdr_dma);
1309	dpaa2_sg_set_len(sg: sgt, len: hdr_len);
1310	dpaa2_sg_set_final(sg: sgt, final: data_left <= 0);
1311
1312	/* Compose the SG entries for each fragment of data */
1313	num_sge = 1;
1314	while (data_left > 0) {
1315	int size;
1316
1317	/* Move to the next SG entry */
1318	sgt++;
1319	size = min_t(int, tso.size, data_left);
1320
1321	addr = dma_map_single(dev, tso.data, size, DMA_TO_DEVICE);
1322	if (dma_mapping_error(dev, dma_addr: addr)) {
1323	netdev_err(dev: priv->net_dev, format: "dma_map_single(tso.data) failed\n");
1324	err = -ENOMEM;
1325	goto err_map_data;
1326	}
1327	dpaa2_sg_set_addr(sg: sgt, addr);
1328	dpaa2_sg_set_len(sg: sgt, len: size);
1329	dpaa2_sg_set_final(sg: sgt, final: size == data_left);
1330
1331	num_sge++;
1332
1333	/* Build the data for the __next__ fragment */
1334	data_left -= size;
1335	tso_build_data(skb, tso: &tso, size);
1336	}
1337
1338	/* Store the skb backpointer in the SGT buffer */
1339	sgt_buf_size = priv->tx_data_offset + num_sge * sizeof(struct dpaa2_sg_entry);
1340	swa = (struct dpaa2_eth_swa *)sgt_buf;
1341	swa->type = DPAA2_ETH_SWA_SW_TSO;
1342	swa->tso.skb = skb;
1343	swa->tso.num_sg = num_sge;
1344	swa->tso.sgt_size = sgt_buf_size;
1345	swa->tso.is_last_fd = total_len == 0 ? 1 : 0;
1346
1347	/* Separately map the SGT buffer */
1348	sgt_addr = dma_map_single(dev, sgt_buf, sgt_buf_size, DMA_BIDIRECTIONAL);
1349	if (unlikely(dma_mapping_error(dev, sgt_addr))) {
1350	netdev_err(dev: priv->net_dev, format: "dma_map_single(sgt_buf) failed\n");
1351	err = -ENOMEM;
1352	goto err_map_sgt;
1353	}
1354
1355	/* Setup the frame descriptor */
1356	memset(fd, 0, sizeof(struct dpaa2_fd));
1357	dpaa2_fd_set_offset(fd, offset: priv->tx_data_offset);
1358	dpaa2_fd_set_format(fd, format: dpaa2_fd_sg);
1359	dpaa2_fd_set_addr(fd, addr: sgt_addr);
1360	dpaa2_fd_set_len(fd, len: fd_len);
1361	dpaa2_fd_set_ctrl(fd, FD_CTRL_PTA);
1362
1363	*total_fds_len += fd_len;
1364	/* Advance to the next frame descriptor */
1365	fd++;
1366	index++;
1367	}
1368
1369	*num_fds = index;
1370
1371	return 0;
1372
1373	err_map_sgt:
1374	err_map_data:
1375	/* Unmap all the data S/G entries for the current FD */
1376	sgt = (struct dpaa2_sg_entry *)(sgt_buf + priv->tx_data_offset);
1377	for (i = 1; i < num_sge; i++)
1378	dma_unmap_single(dev, dpaa2_sg_get_addr(&sgt[i]),
1379	dpaa2_sg_get_len(&sgt[i]), DMA_TO_DEVICE);
1380
1381	/* Unmap the header entry */
1382	dma_unmap_single(dev, tso_hdr_dma, TSO_HEADER_SIZE, DMA_TO_DEVICE);
1383	err_map_tso_hdr:
1384	kfree(objp: tso_hdr);
1385	err_alloc_tso_hdr:
1386	dpaa2_eth_sgt_recycle(priv, sgt_buf);
1387	err_sgt_get:
1388	/* Free all the other FDs that were already fully created */
1389	for (i = 0; i < index; i++)
1390	dpaa2_eth_free_tx_fd(priv, NULL, NULL, fd: &fd_start[i], in_napi: false);
1391
1392	return err;
1393	}
1394
1395	static netdev_tx_t __dpaa2_eth_tx(struct sk_buff *skb,
1396	struct net_device *net_dev)
1397	{
1398	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
1399	int total_enqueued = 0, retries = 0, enqueued;
1400	struct dpaa2_eth_drv_stats *percpu_extras;
1401	struct rtnl_link_stats64 *percpu_stats;
1402	unsigned int needed_headroom;
1403	int num_fds = 1, max_retries;
1404	struct dpaa2_eth_fq *fq;
1405	struct netdev_queue *nq;
1406	struct dpaa2_fd *fd;
1407	u16 queue_mapping;
1408	void *swa = NULL;
1409	u8 prio = 0;
1410	int err, i;
1411	u32 fd_len;
1412
1413	percpu_stats = this_cpu_ptr(priv->percpu_stats);
1414	percpu_extras = this_cpu_ptr(priv->percpu_extras);
1415	fd = (this_cpu_ptr(priv->fd))->array;
1416
1417	needed_headroom = dpaa2_eth_needed_headroom(skb);
1418
1419	/* We'll be holding a back-reference to the skb until Tx Confirmation;
1420	* we don't want that overwritten by a concurrent Tx with a cloned skb.
1421	*/
1422	skb = skb_unshare(skb, GFP_ATOMIC);
1423	if (unlikely(!skb)) {
1424	/* skb_unshare() has already freed the skb */
1425	percpu_stats->tx_dropped++;
1426	return NETDEV_TX_OK;
1427	}
1428
1429	/* Setup the FD fields */
1430
1431	if (skb_is_gso(skb)) {
1432	err = dpaa2_eth_build_gso_fd(priv, skb, fd, num_fds: &num_fds, total_fds_len: &fd_len);
1433	percpu_extras->tx_sg_frames += num_fds;
1434	percpu_extras->tx_sg_bytes += fd_len;
1435	percpu_extras->tx_tso_frames += num_fds;
1436	percpu_extras->tx_tso_bytes += fd_len;
1437	} else if (skb_is_nonlinear(skb)) {
1438	err = dpaa2_eth_build_sg_fd(priv, skb, fd, swa_addr: &swa);
1439	percpu_extras->tx_sg_frames++;
1440	percpu_extras->tx_sg_bytes += skb->len;
1441	fd_len = dpaa2_fd_get_len(fd);
1442	} else if (skb_headroom(skb) < needed_headroom) {
1443	err = dpaa2_eth_build_sg_fd_single_buf(priv, skb, fd, swa_addr: &swa);
1444	percpu_extras->tx_sg_frames++;
1445	percpu_extras->tx_sg_bytes += skb->len;
1446	percpu_extras->tx_converted_sg_frames++;
1447	percpu_extras->tx_converted_sg_bytes += skb->len;
1448	fd_len = dpaa2_fd_get_len(fd);
1449	} else {
1450	err = dpaa2_eth_build_single_fd(priv, skb, fd, swa_addr: &swa);
1451	fd_len = dpaa2_fd_get_len(fd);
1452	}
1453
1454	if (unlikely(err)) {
1455	percpu_stats->tx_dropped++;
1456	goto err_build_fd;
1457	}
1458
1459	if (swa && skb->cb[0])
1460	dpaa2_eth_enable_tx_tstamp(priv, fd, buf_start: swa, skb);
1461
1462	/* Tracing point */
1463	for (i = 0; i < num_fds; i++)
1464	trace_dpaa2_tx_fd(netdev: net_dev, fd: &fd[i]);
1465
1466	/* TxConf FQ selection relies on queue id from the stack.
1467	* In case of a forwarded frame from another DPNI interface, we choose
1468	* a queue affined to the same core that processed the Rx frame
1469	*/
1470	queue_mapping = skb_get_queue_mapping(skb);
1471
1472	if (net_dev->num_tc) {
1473	prio = netdev_txq_to_tc(dev: net_dev, txq: queue_mapping);
1474	/* Hardware interprets priority level 0 as being the highest,
1475	* so we need to do a reverse mapping to the netdev tc index
1476	*/
1477	prio = net_dev->num_tc - prio - 1;
1478	/* We have only one FQ array entry for all Tx hardware queues
1479	* with the same flow id (but different priority levels)
1480	*/
1481	queue_mapping %= dpaa2_eth_queue_count(priv);
1482	}
1483	fq = &priv->fq[queue_mapping];
1484	nq = netdev_get_tx_queue(dev: net_dev, index: queue_mapping);
1485	netdev_tx_sent_queue(dev_queue: nq, bytes: fd_len);
1486
1487	/* Everything that happens after this enqueues might race with
1488	* the Tx confirmation callback for this frame
1489	*/
1490	max_retries = num_fds * DPAA2_ETH_ENQUEUE_RETRIES;
1491	while (total_enqueued < num_fds && retries < max_retries) {
1492	err = priv->enqueue(priv, fq, &fd[total_enqueued],
1493	prio, num_fds - total_enqueued, &enqueued);
1494	if (err == -EBUSY) {
1495	retries++;
1496	continue;
1497	}
1498
1499	total_enqueued += enqueued;
1500	}
1501	percpu_extras->tx_portal_busy += retries;
1502
1503	if (unlikely(err < 0)) {
1504	percpu_stats->tx_errors++;
1505	/* Clean up everything, including freeing the skb */
1506	dpaa2_eth_free_tx_fd(priv, NULL, fq, fd, in_napi: false);
1507	netdev_tx_completed_queue(dev_queue: nq, pkts: 1, bytes: fd_len);
1508	} else {
1509	percpu_stats->tx_packets += total_enqueued;
1510	percpu_stats->tx_bytes += fd_len;
1511	}
1512
1513	return NETDEV_TX_OK;
1514
1515	err_build_fd:
1516	dev_kfree_skb(skb);
1517
1518	return NETDEV_TX_OK;
1519	}
1520
1521	static void dpaa2_eth_tx_onestep_tstamp(struct work_struct *work)
1522	{
1523	struct dpaa2_eth_priv *priv = container_of(work, struct dpaa2_eth_priv,
1524	tx_onestep_tstamp);
1525	struct sk_buff *skb;
1526
1527	while (true) {
1528	skb = skb_dequeue(list: &priv->tx_skbs);
1529	if (!skb)
1530	return;
1531
1532	/* Lock just before TX one-step timestamping packet,
1533	* and release the lock in dpaa2_eth_free_tx_fd when
1534	* confirm the packet has been sent on hardware, or
1535	* when clean up during transmit failure.
1536	*/
1537	mutex_lock(&priv->onestep_tstamp_lock);
1538	__dpaa2_eth_tx(skb, net_dev: priv->net_dev);
1539	}
1540	}
1541
1542	static netdev_tx_t dpaa2_eth_tx(struct sk_buff *skb, struct net_device *net_dev)
1543	{
1544	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
1545	u8 msgtype, twostep, udp;
1546	u16 offset1, offset2;
1547
1548	/* Utilize skb->cb[0] for timestamping request per skb */
1549	skb->cb[0] = 0;
1550
1551	if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && dpaa2_ptp) {
1552	if (priv->tx_tstamp_type == HWTSTAMP_TX_ON)
1553	skb->cb[0] = TX_TSTAMP;
1554	else if (priv->tx_tstamp_type == HWTSTAMP_TX_ONESTEP_SYNC)
1555	skb->cb[0] = TX_TSTAMP_ONESTEP_SYNC;
1556	}
1557
1558	/* TX for one-step timestamping PTP Sync packet */
1559	if (skb->cb[0] == TX_TSTAMP_ONESTEP_SYNC) {
1560	if (!dpaa2_eth_ptp_parse(skb, msgtype: &msgtype, twostep: &twostep, udp: &udp,
1561	correction_offset: &offset1, origintimestamp_offset: &offset2))
1562	if (msgtype == PTP_MSGTYPE_SYNC && twostep == 0) {
1563	skb_queue_tail(list: &priv->tx_skbs, newsk: skb);
1564	queue_work(wq: priv->dpaa2_ptp_wq,
1565	work: &priv->tx_onestep_tstamp);
1566	return NETDEV_TX_OK;
1567	}
1568	/* Use two-step timestamping if not one-step timestamping
1569	* PTP Sync packet
1570	*/
1571	skb->cb[0] = TX_TSTAMP;
1572	}
1573
1574	/* TX for other packets */
1575	return __dpaa2_eth_tx(skb, net_dev);
1576	}
1577
1578	/* Tx confirmation frame processing routine */
1579	static void dpaa2_eth_tx_conf(struct dpaa2_eth_priv *priv,
1580	struct dpaa2_eth_channel *ch,
1581	const struct dpaa2_fd *fd,
1582	struct dpaa2_eth_fq *fq)
1583	{
1584	struct rtnl_link_stats64 *percpu_stats;
1585	struct dpaa2_eth_drv_stats *percpu_extras;
1586	u32 fd_len = dpaa2_fd_get_len(fd);
1587	u32 fd_errors;
1588
1589	/* Tracing point */
1590	trace_dpaa2_tx_conf_fd(netdev: priv->net_dev, fd);
1591
1592	percpu_extras = this_cpu_ptr(priv->percpu_extras);
1593	percpu_extras->tx_conf_frames++;
1594	percpu_extras->tx_conf_bytes += fd_len;
1595	ch->stats.bytes_per_cdan += fd_len;
1596
1597	/* Check frame errors in the FD field */
1598	fd_errors = dpaa2_fd_get_ctrl(fd) & DPAA2_FD_TX_ERR_MASK;
1599	dpaa2_eth_free_tx_fd(priv, ch, fq, fd, in_napi: true);
1600
1601	if (likely(!fd_errors))
1602	return;
1603
1604	if (net_ratelimit())
1605	netdev_dbg(priv->net_dev, "TX frame FD error: 0x%08x\n",
1606	fd_errors);
1607
1608	percpu_stats = this_cpu_ptr(priv->percpu_stats);
1609	/* Tx-conf logically pertains to the egress path. */
1610	percpu_stats->tx_errors++;
1611	}
1612
1613	static int dpaa2_eth_set_rx_vlan_filtering(struct dpaa2_eth_priv *priv,
1614	bool enable)
1615	{
1616	int err;
1617
1618	err = dpni_enable_vlan_filter(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, en: enable);
1619
1620	if (err) {
1621	netdev_err(dev: priv->net_dev,
1622	format: "dpni_enable_vlan_filter failed\n");
1623	return err;
1624	}
1625
1626	return 0;
1627	}
1628
1629	static int dpaa2_eth_set_rx_csum(struct dpaa2_eth_priv *priv, bool enable)
1630	{
1631	int err;
1632
1633	err = dpni_set_offload(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
1634	type: DPNI_OFF_RX_L3_CSUM, config: enable);
1635	if (err) {
1636	netdev_err(dev: priv->net_dev,
1637	format: "dpni_set_offload(RX_L3_CSUM) failed\n");
1638	return err;
1639	}
1640
1641	err = dpni_set_offload(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
1642	type: DPNI_OFF_RX_L4_CSUM, config: enable);
1643	if (err) {
1644	netdev_err(dev: priv->net_dev,
1645	format: "dpni_set_offload(RX_L4_CSUM) failed\n");
1646	return err;
1647	}
1648
1649	return 0;
1650	}
1651
1652	static int dpaa2_eth_set_tx_csum(struct dpaa2_eth_priv *priv, bool enable)
1653	{
1654	int err;
1655
1656	err = dpni_set_offload(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
1657	type: DPNI_OFF_TX_L3_CSUM, config: enable);
1658	if (err) {
1659	netdev_err(dev: priv->net_dev, format: "dpni_set_offload(TX_L3_CSUM) failed\n");
1660	return err;
1661	}
1662
1663	err = dpni_set_offload(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
1664	type: DPNI_OFF_TX_L4_CSUM, config: enable);
1665	if (err) {
1666	netdev_err(dev: priv->net_dev, format: "dpni_set_offload(TX_L4_CSUM) failed\n");
1667	return err;
1668	}
1669
1670	return 0;
1671	}
1672
1673	/* Perform a single release command to add buffers
1674	* to the specified buffer pool
1675	*/
1676	static int dpaa2_eth_add_bufs(struct dpaa2_eth_priv *priv,
1677	struct dpaa2_eth_channel *ch)
1678	{
1679	struct xdp_buff *xdp_buffs[DPAA2_ETH_BUFS_PER_CMD];
1680	struct device *dev = priv->net_dev->dev.parent;
1681	u64 buf_array[DPAA2_ETH_BUFS_PER_CMD];
1682	struct dpaa2_eth_swa *swa;
1683	struct page *page;
1684	dma_addr_t addr;
1685	int retries = 0;
1686	int i = 0, err;
1687	u32 batch;
1688
1689	/* Allocate buffers visible to WRIOP */
1690	if (!ch->xsk_zc) {
1691	for (i = 0; i < DPAA2_ETH_BUFS_PER_CMD; i++) {
1692	/* Also allocate skb shared info and alignment padding.
1693	* There is one page for each Rx buffer. WRIOP sees
1694	* the entire page except for a tailroom reserved for
1695	* skb shared info
1696	*/
1697	page = dev_alloc_pages(order: 0);
1698	if (!page)
1699	goto err_alloc;
1700
1701	addr = dma_map_page(dev, page, 0, priv->rx_buf_size,
1702	DMA_BIDIRECTIONAL);
1703	if (unlikely(dma_mapping_error(dev, addr)))
1704	goto err_map;
1705
1706	buf_array[i] = addr;
1707
1708	/* tracing point */
1709	trace_dpaa2_eth_buf_seed(netdev: priv->net_dev,
1710	page_address(page),
1711	DPAA2_ETH_RX_BUF_RAW_SIZE,
1712	dma_addr: addr, map_size: priv->rx_buf_size,
1713	bpid: ch->bp->bpid);
1714	}
1715	} else if (xsk_buff_can_alloc(pool: ch->xsk_pool, DPAA2_ETH_BUFS_PER_CMD)) {
1716	/* Allocate XSK buffers for AF_XDP fast path in batches
1717	* of DPAA2_ETH_BUFS_PER_CMD. Bail out if the UMEM cannot
1718	* provide enough buffers at the moment
1719	*/
1720	batch = xsk_buff_alloc_batch(pool: ch->xsk_pool, xdp: xdp_buffs,
1721	DPAA2_ETH_BUFS_PER_CMD);
1722	if (!batch)
1723	goto err_alloc;
1724
1725	for (i = 0; i < batch; i++) {
1726	swa = (struct dpaa2_eth_swa *)(xdp_buffs[i]->data_hard_start +
1727	DPAA2_ETH_RX_HWA_SIZE);
1728	swa->xsk.xdp_buff = xdp_buffs[i];
1729
1730	addr = xsk_buff_xdp_get_frame_dma(xdp: xdp_buffs[i]);
1731	if (unlikely(dma_mapping_error(dev, addr)))
1732	goto err_map;
1733
1734	buf_array[i] = addr;
1735
1736	trace_dpaa2_xsk_buf_seed(netdev: priv->net_dev,
1737	vaddr: xdp_buffs[i]->data_hard_start,
1738	DPAA2_ETH_RX_BUF_RAW_SIZE,
1739	dma_addr: addr, map_size: priv->rx_buf_size,
1740	bpid: ch->bp->bpid);
1741	}
1742	}
1743
1744	release_bufs:
1745	/* In case the portal is busy, retry until successful */
1746	while ((err = dpaa2_io_service_release(d: ch->dpio, bpid: ch->bp->bpid,
1747	buffers: buf_array, num_buffers: i)) == -EBUSY) {
1748	if (retries++ >= DPAA2_ETH_SWP_BUSY_RETRIES)
1749	break;
1750	cpu_relax();
1751	}
1752
1753	/* If release command failed, clean up and bail out;
1754	* not much else we can do about it
1755	*/
1756	if (err) {
1757	dpaa2_eth_free_bufs(priv, buf_array, count: i, xsk_zc: ch->xsk_zc);
1758	return 0;
1759	}
1760
1761	return i;
1762
1763	err_map:
1764	if (!ch->xsk_zc) {
1765	__free_pages(page, order: 0);
1766	} else {
1767	for (; i < batch; i++)
1768	xsk_buff_free(xdp: xdp_buffs[i]);
1769	}
1770	err_alloc:
1771	/* If we managed to allocate at least some buffers,
1772	* release them to hardware
1773	*/
1774	if (i)
1775	goto release_bufs;
1776
1777	return 0;
1778	}
1779
1780	static int dpaa2_eth_seed_pool(struct dpaa2_eth_priv *priv,
1781	struct dpaa2_eth_channel *ch)
1782	{
1783	int i;
1784	int new_count;
1785
1786	for (i = 0; i < DPAA2_ETH_NUM_BUFS; i += DPAA2_ETH_BUFS_PER_CMD) {
1787	new_count = dpaa2_eth_add_bufs(priv, ch);
1788	ch->buf_count += new_count;
1789
1790	if (new_count < DPAA2_ETH_BUFS_PER_CMD)
1791	return -ENOMEM;
1792	}
1793
1794	return 0;
1795	}
1796
1797	static void dpaa2_eth_seed_pools(struct dpaa2_eth_priv *priv)
1798	{
1799	struct net_device *net_dev = priv->net_dev;
1800	struct dpaa2_eth_channel *channel;
1801	int i, err = 0;
1802
1803	for (i = 0; i < priv->num_channels; i++) {
1804	channel = priv->channel[i];
1805
1806	err = dpaa2_eth_seed_pool(priv, ch: channel);
1807
1808	/* Not much to do; the buffer pool, though not filled up,
1809	* may still contain some buffers which would enable us
1810	* to limp on.
1811	*/
1812	if (err)
1813	netdev_err(dev: net_dev, format: "Buffer seeding failed for DPBP %d (bpid=%d)\n",
1814	channel->bp->dev->obj_desc.id,
1815	channel->bp->bpid);
1816	}
1817	}
1818
1819	/*
1820	* Drain the specified number of buffers from one of the DPNI's private buffer
1821	* pools.
1822	* @count must not exceeed DPAA2_ETH_BUFS_PER_CMD
1823	*/
1824	static void dpaa2_eth_drain_bufs(struct dpaa2_eth_priv *priv, int bpid,
1825	int count)
1826	{
1827	u64 buf_array[DPAA2_ETH_BUFS_PER_CMD];
1828	bool xsk_zc = false;
1829	int retries = 0;
1830	int i, ret;
1831
1832	for (i = 0; i < priv->num_channels; i++)
1833	if (priv->channel[i]->bp->bpid == bpid)
1834	xsk_zc = priv->channel[i]->xsk_zc;
1835
1836	do {
1837	ret = dpaa2_io_service_acquire(NULL, bpid, buffers: buf_array, num_buffers: count);
1838	if (ret < 0) {
1839	if (ret == -EBUSY &&
1840	retries++ < DPAA2_ETH_SWP_BUSY_RETRIES)
1841	continue;
1842	netdev_err(dev: priv->net_dev, format: "dpaa2_io_service_acquire() failed\n");
1843	return;
1844	}
1845	dpaa2_eth_free_bufs(priv, buf_array, count: ret, xsk_zc);
1846	retries = 0;
1847	} while (ret);
1848	}
1849
1850	static void dpaa2_eth_drain_pool(struct dpaa2_eth_priv *priv, int bpid)
1851	{
1852	int i;
1853
1854	/* Drain the buffer pool */
1855	dpaa2_eth_drain_bufs(priv, bpid, DPAA2_ETH_BUFS_PER_CMD);
1856	dpaa2_eth_drain_bufs(priv, bpid, count: 1);
1857
1858	/* Setup to zero the buffer count of all channels which were
1859	* using this buffer pool.
1860	*/
1861	for (i = 0; i < priv->num_channels; i++)
1862	if (priv->channel[i]->bp->bpid == bpid)
1863	priv->channel[i]->buf_count = 0;
1864	}
1865
1866	static void dpaa2_eth_drain_pools(struct dpaa2_eth_priv *priv)
1867	{
1868	int i;
1869
1870	for (i = 0; i < priv->num_bps; i++)
1871	dpaa2_eth_drain_pool(priv, bpid: priv->bp[i]->bpid);
1872	}
1873
1874	/* Function is called from softirq context only, so we don't need to guard
1875	* the access to percpu count
1876	*/
1877	static int dpaa2_eth_refill_pool(struct dpaa2_eth_priv *priv,
1878	struct dpaa2_eth_channel *ch)
1879	{
1880	int new_count;
1881
1882	if (likely(ch->buf_count >= DPAA2_ETH_REFILL_THRESH))
1883	return 0;
1884
1885	do {
1886	new_count = dpaa2_eth_add_bufs(priv, ch);
1887	if (unlikely(!new_count)) {
1888	/* Out of memory; abort for now, we'll try later on */
1889	break;
1890	}
1891	ch->buf_count += new_count;
1892	} while (ch->buf_count < DPAA2_ETH_NUM_BUFS);
1893
1894	if (unlikely(ch->buf_count < DPAA2_ETH_NUM_BUFS))
1895	return -ENOMEM;
1896
1897	return 0;
1898	}
1899
1900	static void dpaa2_eth_sgt_cache_drain(struct dpaa2_eth_priv *priv)
1901	{
1902	struct dpaa2_eth_sgt_cache *sgt_cache;
1903	u16 count;
1904	int k, i;
1905
1906	for_each_possible_cpu(k) {
1907	sgt_cache = per_cpu_ptr(priv->sgt_cache, k);
1908	count = sgt_cache->count;
1909
1910	for (i = 0; i < count; i++)
1911	skb_free_frag(addr: sgt_cache->buf[i]);
1912	sgt_cache->count = 0;
1913	}
1914	}
1915
1916	static int dpaa2_eth_pull_channel(struct dpaa2_eth_channel *ch)
1917	{
1918	int err;
1919	int dequeues = -1;
1920
1921	/* Retry while portal is busy */
1922	do {
1923	err = dpaa2_io_service_pull_channel(d: ch->dpio, channelid: ch->ch_id,
1924	s: ch->store);
1925	dequeues++;
1926	cpu_relax();
1927	} while (err == -EBUSY && dequeues < DPAA2_ETH_SWP_BUSY_RETRIES);
1928
1929	ch->stats.dequeue_portal_busy += dequeues;
1930	if (unlikely(err))
1931	ch->stats.pull_err++;
1932
1933	return err;
1934	}
1935
1936	/* NAPI poll routine
1937	*
1938	* Frames are dequeued from the QMan channel associated with this NAPI context.
1939	* Rx, Tx confirmation and (if configured) Rx error frames all count
1940	* towards the NAPI budget.
1941	*/
1942	static int dpaa2_eth_poll(struct napi_struct *napi, int budget)
1943	{
1944	struct dpaa2_eth_channel *ch;
1945	struct dpaa2_eth_priv *priv;
1946	int rx_cleaned = 0, txconf_cleaned = 0;
1947	struct dpaa2_eth_fq *fq, *txc_fq = NULL;
1948	struct netdev_queue *nq;
1949	int store_cleaned, work_done;
1950	bool work_done_zc = false;
1951	struct list_head rx_list;
1952	int retries = 0;
1953	u16 flowid;
1954	int err;
1955
1956	ch = container_of(napi, struct dpaa2_eth_channel, napi);
1957	ch->xdp.res = 0;
1958	priv = ch->priv;
1959
1960	INIT_LIST_HEAD(list: &rx_list);
1961	ch->rx_list = &rx_list;
1962
1963	if (ch->xsk_zc) {
1964	work_done_zc = dpaa2_xsk_tx(priv, ch);
1965	/* If we reached the XSK Tx per NAPI threshold, we're done */
1966	if (work_done_zc) {
1967	work_done = budget;
1968	goto out;
1969	}
1970	}
1971
1972	do {
1973	err = dpaa2_eth_pull_channel(ch);
1974	if (unlikely(err))
1975	break;
1976
1977	/* Refill pool if appropriate */
1978	dpaa2_eth_refill_pool(priv, ch);
1979
1980	store_cleaned = dpaa2_eth_consume_frames(ch, src: &fq);
1981	if (store_cleaned <= 0)
1982	break;
1983	if (fq->type == DPAA2_RX_FQ) {
1984	rx_cleaned += store_cleaned;
1985	flowid = fq->flowid;
1986	} else {
1987	txconf_cleaned += store_cleaned;
1988	/* We have a single Tx conf FQ on this channel */
1989	txc_fq = fq;
1990	}
1991
1992	/* If we either consumed the whole NAPI budget with Rx frames
1993	* or we reached the Tx confirmations threshold, we're done.
1994	*/
1995	if (rx_cleaned >= budget ||
1996	txconf_cleaned >= DPAA2_ETH_TXCONF_PER_NAPI) {
1997	work_done = budget;
1998	if (ch->xdp.res & XDP_REDIRECT)
1999	xdp_do_flush();
2000	goto out;
2001	}
2002	} while (store_cleaned);
2003
2004	if (ch->xdp.res & XDP_REDIRECT)
2005	xdp_do_flush();
2006
2007	/* Update NET DIM with the values for this CDAN */
2008	dpaa2_io_update_net_dim(d: ch->dpio, frames: ch->stats.frames_per_cdan,
2009	bytes: ch->stats.bytes_per_cdan);
2010	ch->stats.frames_per_cdan = 0;
2011	ch->stats.bytes_per_cdan = 0;
2012
2013	/* We didn't consume the entire budget, so finish napi and
2014	* re-enable data availability notifications
2015	*/
2016	napi_complete_done(n: napi, work_done: rx_cleaned);
2017	do {
2018	err = dpaa2_io_service_rearm(service: ch->dpio, ctx: &ch->nctx);
2019	cpu_relax();
2020	} while (err == -EBUSY && retries++ < DPAA2_ETH_SWP_BUSY_RETRIES);
2021	WARN_ONCE(err, "CDAN notifications rearm failed on core %d",
2022	ch->nctx.desired_cpu);
2023
2024	work_done = max(rx_cleaned, 1);
2025
2026	out:
2027	netif_receive_skb_list(head: ch->rx_list);
2028
2029	if (ch->xsk_tx_pkts_sent) {
2030	xsk_tx_completed(pool: ch->xsk_pool, nb_entries: ch->xsk_tx_pkts_sent);
2031	ch->xsk_tx_pkts_sent = 0;
2032	}
2033
2034	if (txc_fq && txc_fq->dq_frames) {
2035	nq = netdev_get_tx_queue(dev: priv->net_dev, index: txc_fq->flowid);
2036	netdev_tx_completed_queue(dev_queue: nq, pkts: txc_fq->dq_frames,
2037	bytes: txc_fq->dq_bytes);
2038	txc_fq->dq_frames = 0;
2039	txc_fq->dq_bytes = 0;
2040	}
2041
2042	if (rx_cleaned && ch->xdp.res & XDP_TX)
2043	dpaa2_eth_xdp_tx_flush(priv, ch, fq: &priv->fq[flowid]);
2044
2045	return work_done;
2046	}
2047
2048	static void dpaa2_eth_enable_ch_napi(struct dpaa2_eth_priv *priv)
2049	{
2050	struct dpaa2_eth_channel *ch;
2051	int i;
2052
2053	for (i = 0; i < priv->num_channels; i++) {
2054	ch = priv->channel[i];
2055	napi_enable(n: &ch->napi);
2056	}
2057	}
2058
2059	static void dpaa2_eth_disable_ch_napi(struct dpaa2_eth_priv *priv)
2060	{
2061	struct dpaa2_eth_channel *ch;
2062	int i;
2063
2064	for (i = 0; i < priv->num_channels; i++) {
2065	ch = priv->channel[i];
2066	napi_disable(n: &ch->napi);
2067	}
2068	}
2069
2070	void dpaa2_eth_set_rx_taildrop(struct dpaa2_eth_priv *priv,
2071	bool tx_pause, bool pfc)
2072	{
2073	struct dpni_taildrop td = {0};
2074	struct dpaa2_eth_fq *fq;
2075	int i, err;
2076
2077	/* FQ taildrop: threshold is in bytes, per frame queue. Enabled if
2078	* flow control is disabled (as it might interfere with either the
2079	* buffer pool depletion trigger for pause frames or with the group
2080	* congestion trigger for PFC frames)
2081	*/
2082	td.enable = !tx_pause;
2083	if (priv->rx_fqtd_enabled == td.enable)
2084	goto set_cgtd;
2085
2086	td.threshold = DPAA2_ETH_FQ_TAILDROP_THRESH;
2087	td.units = DPNI_CONGESTION_UNIT_BYTES;
2088
2089	for (i = 0; i < priv->num_fqs; i++) {
2090	fq = &priv->fq[i];
2091	if (fq->type != DPAA2_RX_FQ)
2092	continue;
2093	err = dpni_set_taildrop(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
2094	cg_point: DPNI_CP_QUEUE, q_type: DPNI_QUEUE_RX,
2095	tc: fq->tc, q_index: fq->flowid, taildrop: &td);
2096	if (err) {
2097	netdev_err(dev: priv->net_dev,
2098	format: "dpni_set_taildrop(FQ) failed\n");
2099	return;
2100	}
2101	}
2102
2103	priv->rx_fqtd_enabled = td.enable;
2104
2105	set_cgtd:
2106	/* Congestion group taildrop: threshold is in frames, per group
2107	* of FQs belonging to the same traffic class
2108	* Enabled if general Tx pause disabled or if PFCs are enabled
2109	* (congestion group threhsold for PFC generation is lower than the
2110	* CG taildrop threshold, so it won't interfere with it; we also
2111	* want frames in non-PFC enabled traffic classes to be kept in check)
2112	*/
2113	td.enable = !tx_pause || pfc;
2114	if (priv->rx_cgtd_enabled == td.enable)
2115	return;
2116
2117	td.threshold = DPAA2_ETH_CG_TAILDROP_THRESH(priv);
2118	td.units = DPNI_CONGESTION_UNIT_FRAMES;
2119	for (i = 0; i < dpaa2_eth_tc_count(priv); i++) {
2120	err = dpni_set_taildrop(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
2121	cg_point: DPNI_CP_GROUP, q_type: DPNI_QUEUE_RX,
2122	tc: i, q_index: 0, taildrop: &td);
2123	if (err) {
2124	netdev_err(dev: priv->net_dev,
2125	format: "dpni_set_taildrop(CG) failed\n");
2126	return;
2127	}
2128	}
2129
2130	priv->rx_cgtd_enabled = td.enable;
2131	}
2132
2133	static int dpaa2_eth_link_state_update(struct dpaa2_eth_priv *priv)
2134	{
2135	struct dpni_link_state state = {0};
2136	bool tx_pause;
2137	int err;
2138
2139	err = dpni_get_link_state(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, state: &state);
2140	if (unlikely(err)) {
2141	netdev_err(dev: priv->net_dev,
2142	format: "dpni_get_link_state() failed\n");
2143	return err;
2144	}
2145
2146	/* If Tx pause frame settings have changed, we need to update
2147	* Rx FQ taildrop configuration as well. We configure taildrop
2148	* only when pause frame generation is disabled.
2149	*/
2150	tx_pause = dpaa2_eth_tx_pause_enabled(link_options: state.options);
2151	dpaa2_eth_set_rx_taildrop(priv, tx_pause, pfc: priv->pfc_enabled);
2152
2153	/* When we manage the MAC/PHY using phylink there is no need
2154	* to manually update the netif_carrier.
2155	* We can avoid locking because we are called from the "link changed"
2156	* IRQ handler, which is the same as the "endpoint changed" IRQ handler
2157	* (the writer to priv->mac), so we cannot race with it.
2158	*/
2159	if (dpaa2_mac_is_type_phy(mac: priv->mac))
2160	goto out;
2161
2162	/* Chech link state; speed / duplex changes are not treated yet */
2163	if (priv->link_state.up == state.up)
2164	goto out;
2165
2166	if (state.up) {
2167	netif_carrier_on(dev: priv->net_dev);
2168	netif_tx_start_all_queues(dev: priv->net_dev);
2169	} else {
2170	netif_tx_stop_all_queues(dev: priv->net_dev);
2171	netif_carrier_off(dev: priv->net_dev);
2172	}
2173
2174	netdev_info(dev: priv->net_dev, format: "Link Event: state %s\n",
2175	state.up ? "up" : "down");
2176
2177	out:
2178	priv->link_state = state;
2179
2180	return 0;
2181	}
2182
2183	static int dpaa2_eth_open(struct net_device *net_dev)
2184	{
2185	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
2186	int err;
2187
2188	dpaa2_eth_seed_pools(priv);
2189
2190	mutex_lock(&priv->mac_lock);
2191
2192	if (!dpaa2_eth_is_type_phy(priv)) {
2193	/* We'll only start the txqs when the link is actually ready;
2194	* make sure we don't race against the link up notification,
2195	* which may come immediately after dpni_enable();
2196	*/
2197	netif_tx_stop_all_queues(dev: net_dev);
2198
2199	/* Also, explicitly set carrier off, otherwise
2200	* netif_carrier_ok() will return true and cause 'ip link show'
2201	* to report the LOWER_UP flag, even though the link
2202	* notification wasn't even received.
2203	*/
2204	netif_carrier_off(dev: net_dev);
2205	}
2206	dpaa2_eth_enable_ch_napi(priv);
2207
2208	err = dpni_enable(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token);
2209	if (err < 0) {
2210	mutex_unlock(lock: &priv->mac_lock);
2211	netdev_err(dev: net_dev, format: "dpni_enable() failed\n");
2212	goto enable_err;
2213	}
2214
2215	if (dpaa2_eth_is_type_phy(priv))
2216	dpaa2_mac_start(mac: priv->mac);
2217
2218	mutex_unlock(lock: &priv->mac_lock);
2219
2220	return 0;
2221
2222	enable_err:
2223	dpaa2_eth_disable_ch_napi(priv);
2224	dpaa2_eth_drain_pools(priv);
2225	return err;
2226	}
2227
2228	/* Total number of in-flight frames on ingress queues */
2229	static u32 dpaa2_eth_ingress_fq_count(struct dpaa2_eth_priv *priv)
2230	{
2231	struct dpaa2_eth_fq *fq;
2232	u32 fcnt = 0, bcnt = 0, total = 0;
2233	int i, err;
2234
2235	for (i = 0; i < priv->num_fqs; i++) {
2236	fq = &priv->fq[i];
2237	err = dpaa2_io_query_fq_count(NULL, fqid: fq->fqid, fcnt: &fcnt, bcnt: &bcnt);
2238	if (err) {
2239	netdev_warn(dev: priv->net_dev, format: "query_fq_count failed");
2240	break;
2241	}
2242	total += fcnt;
2243	}
2244
2245	return total;
2246	}
2247
2248	static void dpaa2_eth_wait_for_ingress_fq_empty(struct dpaa2_eth_priv *priv)
2249	{
2250	int retries = 10;
2251	u32 pending;
2252
2253	do {
2254	pending = dpaa2_eth_ingress_fq_count(priv);
2255	if (pending)
2256	msleep(msecs: 100);
2257	} while (pending && --retries);
2258	}
2259
2260	#define DPNI_TX_PENDING_VER_MAJOR 7
2261	#define DPNI_TX_PENDING_VER_MINOR 13
2262	static void dpaa2_eth_wait_for_egress_fq_empty(struct dpaa2_eth_priv *priv)
2263	{
2264	union dpni_statistics stats;
2265	int retries = 10;
2266	int err;
2267
2268	if (dpaa2_eth_cmp_dpni_ver(priv, DPNI_TX_PENDING_VER_MAJOR,
2269	DPNI_TX_PENDING_VER_MINOR) < 0)
2270	goto out;
2271
2272	do {
2273	err = dpni_get_statistics(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, page: 6,
2274	stat: &stats);
2275	if (err)
2276	goto out;
2277	if (stats.page_6.tx_pending_frames == 0)
2278	return;
2279	} while (--retries);
2280
2281	out:
2282	msleep(msecs: 500);
2283	}
2284
2285	static int dpaa2_eth_stop(struct net_device *net_dev)
2286	{
2287	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
2288	int dpni_enabled = 0;
2289	int retries = 10;
2290
2291	mutex_lock(&priv->mac_lock);
2292
2293	if (dpaa2_eth_is_type_phy(priv)) {
2294	dpaa2_mac_stop(mac: priv->mac);
2295	} else {
2296	netif_tx_stop_all_queues(dev: net_dev);
2297	netif_carrier_off(dev: net_dev);
2298	}
2299
2300	mutex_unlock(lock: &priv->mac_lock);
2301
2302	/* On dpni_disable(), the MC firmware will:
2303	* - stop MAC Rx and wait for all Rx frames to be enqueued to software
2304	* - cut off WRIOP dequeues from egress FQs and wait until transmission
2305	* of all in flight Tx frames is finished (and corresponding Tx conf
2306	* frames are enqueued back to software)
2307	*
2308	* Before calling dpni_disable(), we wait for all Tx frames to arrive
2309	* on WRIOP. After it finishes, wait until all remaining frames on Rx
2310	* and Tx conf queues are consumed on NAPI poll.
2311	*/
2312	dpaa2_eth_wait_for_egress_fq_empty(priv);
2313
2314	do {
2315	dpni_disable(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token);
2316	dpni_is_enabled(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, en: &dpni_enabled);
2317	if (dpni_enabled)
2318	/* Allow the hardware some slack */
2319	msleep(msecs: 100);
2320	} while (dpni_enabled && --retries);
2321	if (!retries) {
2322	netdev_warn(dev: net_dev, format: "Retry count exceeded disabling DPNI\n");
2323	/* Must go on and disable NAPI nonetheless, so we don't crash at
2324	* the next "ifconfig up"
2325	*/
2326	}
2327
2328	dpaa2_eth_wait_for_ingress_fq_empty(priv);
2329	dpaa2_eth_disable_ch_napi(priv);
2330
2331	/* Empty the buffer pool */
2332	dpaa2_eth_drain_pools(priv);
2333
2334	/* Empty the Scatter-Gather Buffer cache */
2335	dpaa2_eth_sgt_cache_drain(priv);
2336
2337	return 0;
2338	}
2339
2340	static int dpaa2_eth_set_addr(struct net_device *net_dev, void *addr)
2341	{
2342	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
2343	struct device *dev = net_dev->dev.parent;
2344	int err;
2345
2346	err = eth_mac_addr(dev: net_dev, p: addr);
2347	if (err < 0) {
2348	dev_err(dev, "eth_mac_addr() failed (%d)\n", err);
2349	return err;
2350	}
2351
2352	err = dpni_set_primary_mac_addr(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
2353	mac_addr: net_dev->dev_addr);
2354	if (err) {
2355	dev_err(dev, "dpni_set_primary_mac_addr() failed (%d)\n", err);
2356	return err;
2357	}
2358
2359	return 0;
2360	}
2361
2362	/** Fill in counters maintained by the GPP driver. These may be different from
2363	* the hardware counters obtained by ethtool.
2364	*/
2365	static void dpaa2_eth_get_stats(struct net_device *net_dev,
2366	struct rtnl_link_stats64 *stats)
2367	{
2368	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
2369	struct rtnl_link_stats64 *percpu_stats;
2370	u64 *cpustats;
2371	u64 *netstats = (u64 *)stats;
2372	int i, j;
2373	int num = sizeof(struct rtnl_link_stats64) / sizeof(u64);
2374
2375	for_each_possible_cpu(i) {
2376	percpu_stats = per_cpu_ptr(priv->percpu_stats, i);
2377	cpustats = (u64 *)percpu_stats;
2378	for (j = 0; j < num; j++)
2379	netstats[j] += cpustats[j];
2380	}
2381	}
2382
2383	/* Copy mac unicast addresses from @net_dev to @priv.
2384	* Its sole purpose is to make dpaa2_eth_set_rx_mode() more readable.
2385	*/
2386	static void dpaa2_eth_add_uc_hw_addr(const struct net_device *net_dev,
2387	struct dpaa2_eth_priv *priv)
2388	{
2389	struct netdev_hw_addr *ha;
2390	int err;
2391
2392	netdev_for_each_uc_addr(ha, net_dev) {
2393	err = dpni_add_mac_addr(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
2394	mac_addr: ha->addr);
2395	if (err)
2396	netdev_warn(dev: priv->net_dev,
2397	format: "Could not add ucast MAC %pM to the filtering table (err %d)\n",
2398	ha->addr, err);
2399	}
2400	}
2401
2402	/* Copy mac multicast addresses from @net_dev to @priv
2403	* Its sole purpose is to make dpaa2_eth_set_rx_mode() more readable.
2404	*/
2405	static void dpaa2_eth_add_mc_hw_addr(const struct net_device *net_dev,
2406	struct dpaa2_eth_priv *priv)
2407	{
2408	struct netdev_hw_addr *ha;
2409	int err;
2410
2411	netdev_for_each_mc_addr(ha, net_dev) {
2412	err = dpni_add_mac_addr(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
2413	mac_addr: ha->addr);
2414	if (err)
2415	netdev_warn(dev: priv->net_dev,
2416	format: "Could not add mcast MAC %pM to the filtering table (err %d)\n",
2417	ha->addr, err);
2418	}
2419	}
2420
2421	static int dpaa2_eth_rx_add_vid(struct net_device *net_dev,
2422	__be16 vlan_proto, u16 vid)
2423	{
2424	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
2425	int err;
2426
2427	err = dpni_add_vlan_id(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
2428	vlan_id: vid, flags: 0, tc_id: 0, flow_id: 0);
2429
2430	if (err) {
2431	netdev_warn(dev: priv->net_dev,
2432	format: "Could not add the vlan id %u\n",
2433	vid);
2434	return err;
2435	}
2436
2437	return 0;
2438	}
2439
2440	static int dpaa2_eth_rx_kill_vid(struct net_device *net_dev,
2441	__be16 vlan_proto, u16 vid)
2442	{
2443	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
2444	int err;
2445
2446	err = dpni_remove_vlan_id(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, vlan_id: vid);
2447
2448	if (err) {
2449	netdev_warn(dev: priv->net_dev,
2450	format: "Could not remove the vlan id %u\n",
2451	vid);
2452	return err;
2453	}
2454
2455	return 0;
2456	}
2457
2458	static void dpaa2_eth_set_rx_mode(struct net_device *net_dev)
2459	{
2460	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
2461	int uc_count = netdev_uc_count(net_dev);
2462	int mc_count = netdev_mc_count(net_dev);
2463	u8 max_mac = priv->dpni_attrs.mac_filter_entries;
2464	u32 options = priv->dpni_attrs.options;
2465	u16 mc_token = priv->mc_token;
2466	struct fsl_mc_io *mc_io = priv->mc_io;
2467	int err;
2468
2469	/* Basic sanity checks; these probably indicate a misconfiguration */
2470	if (options & DPNI_OPT_NO_MAC_FILTER && max_mac != 0)
2471	netdev_info(dev: net_dev,
2472	format: "mac_filter_entries=%d, DPNI_OPT_NO_MAC_FILTER option must be disabled\n",
2473	max_mac);
2474
2475	/* Force promiscuous if the uc or mc counts exceed our capabilities. */
2476	if (uc_count > max_mac) {
2477	netdev_info(dev: net_dev,
2478	format: "Unicast addr count reached %d, max allowed is %d; forcing promisc\n",
2479	uc_count, max_mac);
2480	goto force_promisc;
2481	}
2482	if (mc_count + uc_count > max_mac) {
2483	netdev_info(dev: net_dev,
2484	format: "Unicast + multicast addr count reached %d, max allowed is %d; forcing promisc\n",
2485	uc_count + mc_count, max_mac);
2486	goto force_mc_promisc;
2487	}
2488
2489	/* Adjust promisc settings due to flag combinations */
2490	if (net_dev->flags & IFF_PROMISC)
2491	goto force_promisc;
2492	if (net_dev->flags & IFF_ALLMULTI) {
2493	/* First, rebuild unicast filtering table. This should be done
2494	* in promisc mode, in order to avoid frame loss while we
2495	* progressively add entries to the table.
2496	* We don't know whether we had been in promisc already, and
2497	* making an MC call to find out is expensive; so set uc promisc
2498	* nonetheless.
2499	*/
2500	err = dpni_set_unicast_promisc(mc_io, cmd_flags: 0, token: mc_token, en: 1);
2501	if (err)
2502	netdev_warn(dev: net_dev, format: "Can't set uc promisc\n");
2503
2504	/* Actual uc table reconstruction. */
2505	err = dpni_clear_mac_filters(mc_io, cmd_flags: 0, token: mc_token, unicast: 1, multicast: 0);
2506	if (err)
2507	netdev_warn(dev: net_dev, format: "Can't clear uc filters\n");
2508	dpaa2_eth_add_uc_hw_addr(net_dev, priv);
2509
2510	/* Finally, clear uc promisc and set mc promisc as requested. */
2511	err = dpni_set_unicast_promisc(mc_io, cmd_flags: 0, token: mc_token, en: 0);
2512	if (err)
2513	netdev_warn(dev: net_dev, format: "Can't clear uc promisc\n");
2514	goto force_mc_promisc;
2515	}
2516
2517	/* Neither unicast, nor multicast promisc will be on... eventually.
2518	* For now, rebuild mac filtering tables while forcing both of them on.
2519	*/
2520	err = dpni_set_unicast_promisc(mc_io, cmd_flags: 0, token: mc_token, en: 1);
2521	if (err)
2522	netdev_warn(dev: net_dev, format: "Can't set uc promisc (%d)\n", err);
2523	err = dpni_set_multicast_promisc(mc_io, cmd_flags: 0, token: mc_token, en: 1);
2524	if (err)
2525	netdev_warn(dev: net_dev, format: "Can't set mc promisc (%d)\n", err);
2526
2527	/* Actual mac filtering tables reconstruction */
2528	err = dpni_clear_mac_filters(mc_io, cmd_flags: 0, token: mc_token, unicast: 1, multicast: 1);
2529	if (err)
2530	netdev_warn(dev: net_dev, format: "Can't clear mac filters\n");
2531	dpaa2_eth_add_mc_hw_addr(net_dev, priv);
2532	dpaa2_eth_add_uc_hw_addr(net_dev, priv);
2533
2534	/* Now we can clear both ucast and mcast promisc, without risking
2535	* to drop legitimate frames anymore.
2536	*/
2537	err = dpni_set_unicast_promisc(mc_io, cmd_flags: 0, token: mc_token, en: 0);
2538	if (err)
2539	netdev_warn(dev: net_dev, format: "Can't clear ucast promisc\n");
2540	err = dpni_set_multicast_promisc(mc_io, cmd_flags: 0, token: mc_token, en: 0);
2541	if (err)
2542	netdev_warn(dev: net_dev, format: "Can't clear mcast promisc\n");
2543
2544	return;
2545
2546	force_promisc:
2547	err = dpni_set_unicast_promisc(mc_io, cmd_flags: 0, token: mc_token, en: 1);
2548	if (err)
2549	netdev_warn(dev: net_dev, format: "Can't set ucast promisc\n");
2550	force_mc_promisc:
2551	err = dpni_set_multicast_promisc(mc_io, cmd_flags: 0, token: mc_token, en: 1);
2552	if (err)
2553	netdev_warn(dev: net_dev, format: "Can't set mcast promisc\n");
2554	}
2555
2556	static int dpaa2_eth_set_features(struct net_device *net_dev,
2557	netdev_features_t features)
2558	{
2559	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
2560	netdev_features_t changed = features ^ net_dev->features;
2561	bool enable;
2562	int err;
2563
2564	if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) {
2565	enable = !!(features & NETIF_F_HW_VLAN_CTAG_FILTER);
2566	err = dpaa2_eth_set_rx_vlan_filtering(priv, enable);
2567	if (err)
2568	return err;
2569	}
2570
2571	if (changed & NETIF_F_RXCSUM) {
2572	enable = !!(features & NETIF_F_RXCSUM);
2573	err = dpaa2_eth_set_rx_csum(priv, enable);
2574	if (err)
2575	return err;
2576	}
2577
2578	if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) {
2579	enable = !!(features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
2580	err = dpaa2_eth_set_tx_csum(priv, enable);
2581	if (err)
2582	return err;
2583	}
2584
2585	return 0;
2586	}
2587
2588	static int dpaa2_eth_ts_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2589	{
2590	struct dpaa2_eth_priv *priv = netdev_priv(dev);
2591	struct hwtstamp_config config;
2592
2593	if (!dpaa2_ptp)
2594	return -EINVAL;
2595
2596	if (copy_from_user(to: &config, from: rq->ifr_data, n: sizeof(config)))
2597	return -EFAULT;
2598
2599	switch (config.tx_type) {
2600	case HWTSTAMP_TX_OFF:
2601	case HWTSTAMP_TX_ON:
2602	case HWTSTAMP_TX_ONESTEP_SYNC:
2603	priv->tx_tstamp_type = config.tx_type;
2604	break;
2605	default:
2606	return -ERANGE;
2607	}
2608
2609	if (config.rx_filter == HWTSTAMP_FILTER_NONE) {
2610	priv->rx_tstamp = false;
2611	} else {
2612	priv->rx_tstamp = true;
2613	/* TS is set for all frame types, not only those requested */
2614	config.rx_filter = HWTSTAMP_FILTER_ALL;
2615	}
2616
2617	if (priv->tx_tstamp_type == HWTSTAMP_TX_ONESTEP_SYNC)
2618	dpaa2_ptp_onestep_reg_update_method(priv);
2619
2620	return copy_to_user(to: rq->ifr_data, from: &config, n: sizeof(config)) ?
2621	-EFAULT : 0;
2622	}
2623
2624	static int dpaa2_eth_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2625	{
2626	struct dpaa2_eth_priv *priv = netdev_priv(dev);
2627	int err;
2628
2629	if (cmd == SIOCSHWTSTAMP)
2630	return dpaa2_eth_ts_ioctl(dev, rq, cmd);
2631
2632	mutex_lock(&priv->mac_lock);
2633
2634	if (dpaa2_eth_is_type_phy(priv)) {
2635	err = phylink_mii_ioctl(priv->mac->phylink, rq, cmd);
2636	mutex_unlock(lock: &priv->mac_lock);
2637	return err;
2638	}
2639
2640	mutex_unlock(lock: &priv->mac_lock);
2641
2642	return -EOPNOTSUPP;
2643	}
2644
2645	static bool xdp_mtu_valid(struct dpaa2_eth_priv *priv, int mtu)
2646	{
2647	int mfl, linear_mfl;
2648
2649	mfl = DPAA2_ETH_L2_MAX_FRM(mtu);
2650	linear_mfl = priv->rx_buf_size - DPAA2_ETH_RX_HWA_SIZE -
2651	dpaa2_eth_rx_head_room(priv) - XDP_PACKET_HEADROOM;
2652
2653	if (mfl > linear_mfl) {
2654	netdev_warn(dev: priv->net_dev, format: "Maximum MTU for XDP is %d\n",
2655	linear_mfl - VLAN_ETH_HLEN);
2656	return false;
2657	}
2658
2659	return true;
2660	}
2661
2662	static int dpaa2_eth_set_rx_mfl(struct dpaa2_eth_priv *priv, int mtu, bool has_xdp)
2663	{
2664	int mfl, err;
2665
2666	/* We enforce a maximum Rx frame length based on MTU only if we have
2667	* an XDP program attached (in order to avoid Rx S/G frames).
2668	* Otherwise, we accept all incoming frames as long as they are not
2669	* larger than maximum size supported in hardware
2670	*/
2671	if (has_xdp)
2672	mfl = DPAA2_ETH_L2_MAX_FRM(mtu);
2673	else
2674	mfl = DPAA2_ETH_MFL;
2675
2676	err = dpni_set_max_frame_length(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, max_frame_length: mfl);
2677	if (err) {
2678	netdev_err(dev: priv->net_dev, format: "dpni_set_max_frame_length failed\n");
2679	return err;
2680	}
2681
2682	return 0;
2683	}
2684
2685	static int dpaa2_eth_change_mtu(struct net_device *dev, int new_mtu)
2686	{
2687	struct dpaa2_eth_priv *priv = netdev_priv(dev);
2688	int err;
2689
2690	if (!priv->xdp_prog)
2691	goto out;
2692
2693	if (!xdp_mtu_valid(priv, mtu: new_mtu))
2694	return -EINVAL;
2695
2696	err = dpaa2_eth_set_rx_mfl(priv, mtu: new_mtu, has_xdp: true);
2697	if (err)
2698	return err;
2699
2700	out:
2701	dev->mtu = new_mtu;
2702	return 0;
2703	}
2704
2705	static int dpaa2_eth_update_rx_buffer_headroom(struct dpaa2_eth_priv *priv, bool has_xdp)
2706	{
2707	struct dpni_buffer_layout buf_layout = {0};
2708	int err;
2709
2710	err = dpni_get_buffer_layout(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
2711	qtype: DPNI_QUEUE_RX, layout: &buf_layout);
2712	if (err) {
2713	netdev_err(dev: priv->net_dev, format: "dpni_get_buffer_layout failed\n");
2714	return err;
2715	}
2716
2717	/* Reserve extra headroom for XDP header size changes */
2718	buf_layout.data_head_room = dpaa2_eth_rx_head_room(priv) +
2719	(has_xdp ? XDP_PACKET_HEADROOM : 0);
2720	buf_layout.options = DPNI_BUF_LAYOUT_OPT_DATA_HEAD_ROOM;
2721	err = dpni_set_buffer_layout(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
2722	qtype: DPNI_QUEUE_RX, layout: &buf_layout);
2723	if (err) {
2724	netdev_err(dev: priv->net_dev, format: "dpni_set_buffer_layout failed\n");
2725	return err;
2726	}
2727
2728	return 0;
2729	}
2730
2731	static int dpaa2_eth_setup_xdp(struct net_device *dev, struct bpf_prog *prog)
2732	{
2733	struct dpaa2_eth_priv *priv = netdev_priv(dev);
2734	struct dpaa2_eth_channel *ch;
2735	struct bpf_prog *old;
2736	bool up, need_update;
2737	int i, err;
2738
2739	if (prog && !xdp_mtu_valid(priv, mtu: dev->mtu))
2740	return -EINVAL;
2741
2742	if (prog)
2743	bpf_prog_add(prog, i: priv->num_channels);
2744
2745	up = netif_running(dev);
2746	need_update = (!!priv->xdp_prog != !!prog);
2747
2748	if (up)
2749	dev_close(dev);
2750
2751	/* While in xdp mode, enforce a maximum Rx frame size based on MTU.
2752	* Also, when switching between xdp/non-xdp modes we need to reconfigure
2753	* our Rx buffer layout. Buffer pool was drained on dpaa2_eth_stop,
2754	* so we are sure no old format buffers will be used from now on.
2755	*/
2756	if (need_update) {
2757	err = dpaa2_eth_set_rx_mfl(priv, mtu: dev->mtu, has_xdp: !!prog);
2758	if (err)
2759	goto out_err;
2760	err = dpaa2_eth_update_rx_buffer_headroom(priv, has_xdp: !!prog);
2761	if (err)
2762	goto out_err;
2763	}
2764
2765	old = xchg(&priv->xdp_prog, prog);
2766	if (old)
2767	bpf_prog_put(prog: old);
2768
2769	for (i = 0; i < priv->num_channels; i++) {
2770	ch = priv->channel[i];
2771	old = xchg(&ch->xdp.prog, prog);
2772	if (old)
2773	bpf_prog_put(prog: old);
2774	}
2775
2776	if (up) {
2777	err = dev_open(dev, NULL);
2778	if (err)
2779	return err;
2780	}
2781
2782	return 0;
2783
2784	out_err:
2785	if (prog)
2786	bpf_prog_sub(prog, i: priv->num_channels);
2787	if (up)
2788	dev_open(dev, NULL);
2789
2790	return err;
2791	}
2792
2793	static int dpaa2_eth_xdp(struct net_device *dev, struct netdev_bpf *xdp)
2794	{
2795	switch (xdp->command) {
2796	case XDP_SETUP_PROG:
2797	return dpaa2_eth_setup_xdp(dev, prog: xdp->prog);
2798	case XDP_SETUP_XSK_POOL:
2799	return dpaa2_xsk_setup_pool(dev, pool: xdp->xsk.pool, qid: xdp->xsk.queue_id);
2800	default:
2801	return -EINVAL;
2802	}
2803
2804	return 0;
2805	}
2806
2807	static int dpaa2_eth_xdp_create_fd(struct net_device *net_dev,
2808	struct xdp_frame *xdpf,
2809	struct dpaa2_fd *fd)
2810	{
2811	struct device *dev = net_dev->dev.parent;
2812	unsigned int needed_headroom;
2813	struct dpaa2_eth_swa *swa;
2814	void *buffer_start, *aligned_start;
2815	dma_addr_t addr;
2816
2817	/* We require a minimum headroom to be able to transmit the frame.
2818	* Otherwise return an error and let the original net_device handle it
2819	*/
2820	needed_headroom = dpaa2_eth_needed_headroom(NULL);
2821	if (xdpf->headroom < needed_headroom)
2822	return -EINVAL;
2823
2824	/* Setup the FD fields */
2825	memset(fd, 0, sizeof(*fd));
2826
2827	/* Align FD address, if possible */
2828	buffer_start = xdpf->data - needed_headroom;
2829	aligned_start = PTR_ALIGN(buffer_start - DPAA2_ETH_TX_BUF_ALIGN,
2830	DPAA2_ETH_TX_BUF_ALIGN);
2831	if (aligned_start >= xdpf->data - xdpf->headroom)
2832	buffer_start = aligned_start;
2833
2834	swa = (struct dpaa2_eth_swa *)buffer_start;
2835	/* fill in necessary fields here */
2836	swa->type = DPAA2_ETH_SWA_XDP;
2837	swa->xdp.dma_size = xdpf->data + xdpf->len - buffer_start;
2838	swa->xdp.xdpf = xdpf;
2839
2840	addr = dma_map_single(dev, buffer_start,
2841	swa->xdp.dma_size,
2842	DMA_BIDIRECTIONAL);
2843	if (unlikely(dma_mapping_error(dev, addr)))
2844	return -ENOMEM;
2845
2846	dpaa2_fd_set_addr(fd, addr);
2847	dpaa2_fd_set_offset(fd, offset: xdpf->data - buffer_start);
2848	dpaa2_fd_set_len(fd, len: xdpf->len);
2849	dpaa2_fd_set_format(fd, format: dpaa2_fd_single);
2850	dpaa2_fd_set_ctrl(fd, FD_CTRL_PTA);
2851
2852	return 0;
2853	}
2854
2855	static int dpaa2_eth_xdp_xmit(struct net_device *net_dev, int n,
2856	struct xdp_frame **frames, u32 flags)
2857	{
2858	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
2859	struct dpaa2_eth_xdp_fds *xdp_redirect_fds;
2860	struct rtnl_link_stats64 *percpu_stats;
2861	struct dpaa2_eth_fq *fq;
2862	struct dpaa2_fd *fds;
2863	int enqueued, i, err;
2864
2865	if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
2866	return -EINVAL;
2867
2868	if (!netif_running(dev: net_dev))
2869	return -ENETDOWN;
2870
2871	fq = &priv->fq[smp_processor_id()];
2872	xdp_redirect_fds = &fq->xdp_redirect_fds;
2873	fds = xdp_redirect_fds->fds;
2874
2875	percpu_stats = this_cpu_ptr(priv->percpu_stats);
2876
2877	/* create a FD for each xdp_frame in the list received */
2878	for (i = 0; i < n; i++) {
2879	err = dpaa2_eth_xdp_create_fd(net_dev, xdpf: frames[i], fd: &fds[i]);
2880	if (err)
2881	break;
2882	}
2883	xdp_redirect_fds->num = i;
2884
2885	/* enqueue all the frame descriptors */
2886	enqueued = dpaa2_eth_xdp_flush(priv, fq, xdp_fds: xdp_redirect_fds);
2887
2888	/* update statistics */
2889	percpu_stats->tx_packets += enqueued;
2890	for (i = 0; i < enqueued; i++)
2891	percpu_stats->tx_bytes += dpaa2_fd_get_len(fd: &fds[i]);
2892
2893	return enqueued;
2894	}
2895
2896	static int update_xps(struct dpaa2_eth_priv *priv)
2897	{
2898	struct net_device *net_dev = priv->net_dev;
2899	struct cpumask xps_mask;
2900	struct dpaa2_eth_fq *fq;
2901	int i, num_queues, netdev_queues;
2902	int err = 0;
2903
2904	num_queues = dpaa2_eth_queue_count(priv);
2905	netdev_queues = (net_dev->num_tc ? : 1) * num_queues;
2906
2907	/* The first <num_queues> entries in priv->fq array are Tx/Tx conf
2908	* queues, so only process those
2909	*/
2910	for (i = 0; i < netdev_queues; i++) {
2911	fq = &priv->fq[i % num_queues];
2912
2913	cpumask_clear(dstp: &xps_mask);
2914	cpumask_set_cpu(cpu: fq->target_cpu, dstp: &xps_mask);
2915
2916	err = netif_set_xps_queue(dev: net_dev, mask: &xps_mask, index: i);
2917	if (err) {
2918	netdev_warn_once(net_dev, "Error setting XPS queue\n");
2919	break;
2920	}
2921	}
2922
2923	return err;
2924	}
2925
2926	static int dpaa2_eth_setup_mqprio(struct net_device *net_dev,
2927	struct tc_mqprio_qopt *mqprio)
2928	{
2929	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
2930	u8 num_tc, num_queues;
2931	int i;
2932
2933	mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
2934	num_queues = dpaa2_eth_queue_count(priv);
2935	num_tc = mqprio->num_tc;
2936
2937	if (num_tc == net_dev->num_tc)
2938	return 0;
2939
2940	if (num_tc > dpaa2_eth_tc_count(priv)) {
2941	netdev_err(dev: net_dev, format: "Max %d traffic classes supported\n",
2942	dpaa2_eth_tc_count(priv));
2943	return -EOPNOTSUPP;
2944	}
2945
2946	if (!num_tc) {
2947	netdev_reset_tc(dev: net_dev);
2948	netif_set_real_num_tx_queues(dev: net_dev, txq: num_queues);
2949	goto out;
2950	}
2951
2952	netdev_set_num_tc(dev: net_dev, num_tc);
2953	netif_set_real_num_tx_queues(dev: net_dev, txq: num_tc * num_queues);
2954
2955	for (i = 0; i < num_tc; i++)
2956	netdev_set_tc_queue(dev: net_dev, tc: i, count: num_queues, offset: i * num_queues);
2957
2958	out:
2959	update_xps(priv);
2960
2961	return 0;
2962	}
2963
2964	#define bps_to_mbits(rate) (div_u64((rate), 1000000) * 8)
2965
2966	static int dpaa2_eth_setup_tbf(struct net_device *net_dev, struct tc_tbf_qopt_offload *p)
2967	{
2968	struct tc_tbf_qopt_offload_replace_params *cfg = &p->replace_params;
2969	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
2970	struct dpni_tx_shaping_cfg tx_cr_shaper = { 0 };
2971	struct dpni_tx_shaping_cfg tx_er_shaper = { 0 };
2972	int err;
2973
2974	if (p->command == TC_TBF_STATS)
2975	return -EOPNOTSUPP;
2976
2977	/* Only per port Tx shaping */
2978	if (p->parent != TC_H_ROOT)
2979	return -EOPNOTSUPP;
2980
2981	if (p->command == TC_TBF_REPLACE) {
2982	if (cfg->max_size > DPAA2_ETH_MAX_BURST_SIZE) {
2983	netdev_err(dev: net_dev, format: "burst size cannot be greater than %d\n",
2984	DPAA2_ETH_MAX_BURST_SIZE);
2985	return -EINVAL;
2986	}
2987
2988	tx_cr_shaper.max_burst_size = cfg->max_size;
2989	/* The TBF interface is in bytes/s, whereas DPAA2 expects the
2990	* rate in Mbits/s
2991	*/
2992	tx_cr_shaper.rate_limit = bps_to_mbits(cfg->rate.rate_bytes_ps);
2993	}
2994
2995	err = dpni_set_tx_shaping(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, tx_cr_shaper: &tx_cr_shaper,
2996	tx_er_shaper: &tx_er_shaper, coupled: 0);
2997	if (err) {
2998	netdev_err(dev: net_dev, format: "dpni_set_tx_shaping() = %d\n", err);
2999	return err;
3000	}
3001
3002	return 0;
3003	}
3004
3005	static int dpaa2_eth_setup_tc(struct net_device *net_dev,
3006	enum tc_setup_type type, void *type_data)
3007	{
3008	switch (type) {
3009	case TC_SETUP_QDISC_MQPRIO:
3010	return dpaa2_eth_setup_mqprio(net_dev, mqprio: type_data);
3011	case TC_SETUP_QDISC_TBF:
3012	return dpaa2_eth_setup_tbf(net_dev, p: type_data);
3013	default:
3014	return -EOPNOTSUPP;
3015	}
3016	}
3017
3018	static const struct net_device_ops dpaa2_eth_ops = {
3019	.ndo_open = dpaa2_eth_open,
3020	.ndo_start_xmit = dpaa2_eth_tx,
3021	.ndo_stop = dpaa2_eth_stop,
3022	.ndo_set_mac_address = dpaa2_eth_set_addr,
3023	.ndo_get_stats64 = dpaa2_eth_get_stats,
3024	.ndo_set_rx_mode = dpaa2_eth_set_rx_mode,
3025	.ndo_set_features = dpaa2_eth_set_features,
3026	.ndo_eth_ioctl = dpaa2_eth_ioctl,
3027	.ndo_change_mtu = dpaa2_eth_change_mtu,
3028	.ndo_bpf = dpaa2_eth_xdp,
3029	.ndo_xdp_xmit = dpaa2_eth_xdp_xmit,
3030	.ndo_xsk_wakeup = dpaa2_xsk_wakeup,
3031	.ndo_setup_tc = dpaa2_eth_setup_tc,
3032	.ndo_vlan_rx_add_vid = dpaa2_eth_rx_add_vid,
3033	.ndo_vlan_rx_kill_vid = dpaa2_eth_rx_kill_vid
3034	};
3035
3036	static void dpaa2_eth_cdan_cb(struct dpaa2_io_notification_ctx *ctx)
3037	{
3038	struct dpaa2_eth_channel *ch;
3039
3040	ch = container_of(ctx, struct dpaa2_eth_channel, nctx);
3041
3042	/* Update NAPI statistics */
3043	ch->stats.cdan++;
3044
3045	/* NAPI can also be scheduled from the AF_XDP Tx path. Mark a missed
3046	* so that it can be rescheduled again.
3047	*/
3048	if (!napi_if_scheduled_mark_missed(n: &ch->napi))
3049	napi_schedule(n: &ch->napi);
3050	}
3051
3052	/* Allocate and configure a DPCON object */
3053	static struct fsl_mc_device *dpaa2_eth_setup_dpcon(struct dpaa2_eth_priv *priv)
3054	{
3055	struct fsl_mc_device *dpcon;
3056	struct device *dev = priv->net_dev->dev.parent;
3057	int err;
3058
3059	err = fsl_mc_object_allocate(to_fsl_mc_device(dev),
3060	pool_type: FSL_MC_POOL_DPCON, new_mc_adev: &dpcon);
3061	if (err) {
3062	if (err == -ENXIO) {
3063	dev_dbg(dev, "Waiting for DPCON\n");
3064	err = -EPROBE_DEFER;
3065	} else {
3066	dev_info(dev, "Not enough DPCONs, will go on as-is\n");
3067	}
3068	return ERR_PTR(error: err);
3069	}
3070
3071	err = dpcon_open(mc_io: priv->mc_io, cmd_flags: 0, dpcon_id: dpcon->obj_desc.id, token: &dpcon->mc_handle);
3072	if (err) {
3073	dev_err(dev, "dpcon_open() failed\n");
3074	goto free;
3075	}
3076
3077	err = dpcon_reset(mc_io: priv->mc_io, cmd_flags: 0, token: dpcon->mc_handle);
3078	if (err) {
3079	dev_err(dev, "dpcon_reset() failed\n");
3080	goto close;
3081	}
3082
3083	err = dpcon_enable(mc_io: priv->mc_io, cmd_flags: 0, token: dpcon->mc_handle);
3084	if (err) {
3085	dev_err(dev, "dpcon_enable() failed\n");
3086	goto close;
3087	}
3088
3089	return dpcon;
3090
3091	close:
3092	dpcon_close(mc_io: priv->mc_io, cmd_flags: 0, token: dpcon->mc_handle);
3093	free:
3094	fsl_mc_object_free(mc_adev: dpcon);
3095
3096	return ERR_PTR(error: err);
3097	}
3098
3099	static void dpaa2_eth_free_dpcon(struct dpaa2_eth_priv *priv,
3100	struct fsl_mc_device *dpcon)
3101	{
3102	dpcon_disable(mc_io: priv->mc_io, cmd_flags: 0, token: dpcon->mc_handle);
3103	dpcon_close(mc_io: priv->mc_io, cmd_flags: 0, token: dpcon->mc_handle);
3104	fsl_mc_object_free(mc_adev: dpcon);
3105	}
3106
3107	static struct dpaa2_eth_channel *dpaa2_eth_alloc_channel(struct dpaa2_eth_priv *priv)
3108	{
3109	struct dpaa2_eth_channel *channel;
3110	struct dpcon_attr attr;
3111	struct device *dev = priv->net_dev->dev.parent;
3112	int err;
3113
3114	channel = kzalloc(size: sizeof(*channel), GFP_KERNEL);
3115	if (!channel)
3116	return NULL;
3117
3118	channel->dpcon = dpaa2_eth_setup_dpcon(priv);
3119	if (IS_ERR(ptr: channel->dpcon)) {
3120	err = PTR_ERR(ptr: channel->dpcon);
3121	goto err_setup;
3122	}
3123
3124	err = dpcon_get_attributes(mc_io: priv->mc_io, cmd_flags: 0, token: channel->dpcon->mc_handle,
3125	attr: &attr);
3126	if (err) {
3127	dev_err(dev, "dpcon_get_attributes() failed\n");
3128	goto err_get_attr;
3129	}
3130
3131	channel->dpcon_id = attr.id;
3132	channel->ch_id = attr.qbman_ch_id;
3133	channel->priv = priv;
3134
3135	return channel;
3136
3137	err_get_attr:
3138	dpaa2_eth_free_dpcon(priv, dpcon: channel->dpcon);
3139	err_setup:
3140	kfree(objp: channel);
3141	return ERR_PTR(error: err);
3142	}
3143
3144	static void dpaa2_eth_free_channel(struct dpaa2_eth_priv *priv,
3145	struct dpaa2_eth_channel *channel)
3146	{
3147	dpaa2_eth_free_dpcon(priv, dpcon: channel->dpcon);
3148	kfree(objp: channel);
3149	}
3150
3151	/* DPIO setup: allocate and configure QBMan channels, setup core affinity
3152	* and register data availability notifications
3153	*/
3154	static int dpaa2_eth_setup_dpio(struct dpaa2_eth_priv *priv)
3155	{
3156	struct dpaa2_io_notification_ctx *nctx;
3157	struct dpaa2_eth_channel *channel;
3158	struct dpcon_notification_cfg dpcon_notif_cfg;
3159	struct device *dev = priv->net_dev->dev.parent;
3160	int i, err;
3161
3162	/* We want the ability to spread ingress traffic (RX, TX conf) to as
3163	* many cores as possible, so we need one channel for each core
3164	* (unless there's fewer queues than cores, in which case the extra
3165	* channels would be wasted).
3166	* Allocate one channel per core and register it to the core's
3167	* affine DPIO. If not enough channels are available for all cores
3168	* or if some cores don't have an affine DPIO, there will be no
3169	* ingress frame processing on those cores.
3170	*/
3171	cpumask_clear(dstp: &priv->dpio_cpumask);
3172	for_each_online_cpu(i) {
3173	/* Try to allocate a channel */
3174	channel = dpaa2_eth_alloc_channel(priv);
3175	if (IS_ERR_OR_NULL(ptr: channel)) {
3176	err = PTR_ERR_OR_ZERO(ptr: channel);
3177	if (err == -EPROBE_DEFER)
3178	dev_dbg(dev, "waiting for affine channel\n");
3179	else
3180	dev_info(dev,
3181	"No affine channel for cpu %d and above\n", i);
3182	goto err_alloc_ch;
3183	}
3184
3185	priv->channel[priv->num_channels] = channel;
3186
3187	nctx = &channel->nctx;
3188	nctx->is_cdan = 1;
3189	nctx->cb = dpaa2_eth_cdan_cb;
3190	nctx->id = channel->ch_id;
3191	nctx->desired_cpu = i;
3192
3193	/* Register the new context */
3194	channel->dpio = dpaa2_io_service_select(cpu: i);
3195	err = dpaa2_io_service_register(service: channel->dpio, ctx: nctx, dev);
3196	if (err) {
3197	dev_dbg(dev, "No affine DPIO for cpu %d\n", i);
3198	/* If no affine DPIO for this core, there's probably
3199	* none available for next cores either. Signal we want
3200	* to retry later, in case the DPIO devices weren't
3201	* probed yet.
3202	*/
3203	err = -EPROBE_DEFER;
3204	goto err_service_reg;
3205	}
3206
3207	/* Register DPCON notification with MC */
3208	dpcon_notif_cfg.dpio_id = nctx->dpio_id;
3209	dpcon_notif_cfg.priority = 0;
3210	dpcon_notif_cfg.user_ctx = nctx->qman64;
3211	err = dpcon_set_notification(mc_io: priv->mc_io, cmd_flags: 0,
3212	token: channel->dpcon->mc_handle,
3213	cfg: &dpcon_notif_cfg);
3214	if (err) {
3215	dev_err(dev, "dpcon_set_notification failed()\n");
3216	goto err_set_cdan;
3217	}
3218
3219	/* If we managed to allocate a channel and also found an affine
3220	* DPIO for this core, add it to the final mask
3221	*/
3222	cpumask_set_cpu(cpu: i, dstp: &priv->dpio_cpumask);
3223	priv->num_channels++;
3224
3225	/* Stop if we already have enough channels to accommodate all
3226	* RX and TX conf queues
3227	*/
3228	if (priv->num_channels == priv->dpni_attrs.num_queues)
3229	break;
3230	}
3231
3232	return 0;
3233
3234	err_set_cdan:
3235	dpaa2_io_service_deregister(service: channel->dpio, ctx: nctx, dev);
3236	err_service_reg:
3237	dpaa2_eth_free_channel(priv, channel);
3238	err_alloc_ch:
3239	if (err == -EPROBE_DEFER) {
3240	for (i = 0; i < priv->num_channels; i++) {
3241	channel = priv->channel[i];
3242	nctx = &channel->nctx;
3243	dpaa2_io_service_deregister(service: channel->dpio, ctx: nctx, dev);
3244	dpaa2_eth_free_channel(priv, channel);
3245	}
3246	priv->num_channels = 0;
3247	return err;
3248	}
3249
3250	if (cpumask_empty(srcp: &priv->dpio_cpumask)) {
3251	dev_err(dev, "No cpu with an affine DPIO/DPCON\n");
3252	return -ENODEV;
3253	}
3254
3255	dev_info(dev, "Cores %*pbl available for processing ingress traffic\n",
3256	cpumask_pr_args(&priv->dpio_cpumask));
3257
3258	return 0;
3259	}
3260
3261	static void dpaa2_eth_free_dpio(struct dpaa2_eth_priv *priv)
3262	{
3263	struct device *dev = priv->net_dev->dev.parent;
3264	struct dpaa2_eth_channel *ch;
3265	int i;
3266
3267	/* deregister CDAN notifications and free channels */
3268	for (i = 0; i < priv->num_channels; i++) {
3269	ch = priv->channel[i];
3270	dpaa2_io_service_deregister(service: ch->dpio, ctx: &ch->nctx, dev);
3271	dpaa2_eth_free_channel(priv, channel: ch);
3272	}
3273	}
3274
3275	static struct dpaa2_eth_channel *dpaa2_eth_get_affine_channel(struct dpaa2_eth_priv *priv,
3276	int cpu)
3277	{
3278	struct device *dev = priv->net_dev->dev.parent;
3279	int i;
3280
3281	for (i = 0; i < priv->num_channels; i++)
3282	if (priv->channel[i]->nctx.desired_cpu == cpu)
3283	return priv->channel[i];
3284
3285	/* We should never get here. Issue a warning and return
3286	* the first channel, because it's still better than nothing
3287	*/
3288	dev_warn(dev, "No affine channel found for cpu %d\n", cpu);
3289
3290	return priv->channel[0];
3291	}
3292
3293	static void dpaa2_eth_set_fq_affinity(struct dpaa2_eth_priv *priv)
3294	{
3295	struct device *dev = priv->net_dev->dev.parent;
3296	struct dpaa2_eth_fq *fq;
3297	int rx_cpu, txc_cpu;
3298	int i;
3299
3300	/* For each FQ, pick one channel/CPU to deliver frames to.
3301	* This may well change at runtime, either through irqbalance or
3302	* through direct user intervention.
3303	*/
3304	rx_cpu = txc_cpu = cpumask_first(srcp: &priv->dpio_cpumask);
3305
3306	for (i = 0; i < priv->num_fqs; i++) {
3307	fq = &priv->fq[i];
3308	switch (fq->type) {
3309	case DPAA2_RX_FQ:
3310	case DPAA2_RX_ERR_FQ:
3311	fq->target_cpu = rx_cpu;
3312	rx_cpu = cpumask_next(n: rx_cpu, srcp: &priv->dpio_cpumask);
3313	if (rx_cpu >= nr_cpu_ids)
3314	rx_cpu = cpumask_first(srcp: &priv->dpio_cpumask);
3315	break;
3316	case DPAA2_TX_CONF_FQ:
3317	fq->target_cpu = txc_cpu;
3318	txc_cpu = cpumask_next(n: txc_cpu, srcp: &priv->dpio_cpumask);
3319	if (txc_cpu >= nr_cpu_ids)
3320	txc_cpu = cpumask_first(srcp: &priv->dpio_cpumask);
3321	break;
3322	default:
3323	dev_err(dev, "Unknown FQ type: %d\n", fq->type);
3324	}
3325	fq->channel = dpaa2_eth_get_affine_channel(priv, cpu: fq->target_cpu);
3326	}
3327
3328	update_xps(priv);
3329	}
3330
3331	static void dpaa2_eth_setup_fqs(struct dpaa2_eth_priv *priv)
3332	{
3333	int i, j;
3334
3335	/* We have one TxConf FQ per Tx flow.
3336	* The number of Tx and Rx queues is the same.
3337	* Tx queues come first in the fq array.
3338	*/
3339	for (i = 0; i < dpaa2_eth_queue_count(priv); i++) {
3340	priv->fq[priv->num_fqs].type = DPAA2_TX_CONF_FQ;
3341	priv->fq[priv->num_fqs].consume = dpaa2_eth_tx_conf;
3342	priv->fq[priv->num_fqs++].flowid = (u16)i;
3343	}
3344
3345	for (j = 0; j < dpaa2_eth_tc_count(priv); j++) {
3346	for (i = 0; i < dpaa2_eth_queue_count(priv); i++) {
3347	priv->fq[priv->num_fqs].type = DPAA2_RX_FQ;
3348	priv->fq[priv->num_fqs].consume = dpaa2_eth_rx;
3349	priv->fq[priv->num_fqs].tc = (u8)j;
3350	priv->fq[priv->num_fqs++].flowid = (u16)i;
3351	}
3352	}
3353
3354	/* We have exactly one Rx error queue per DPNI */
3355	priv->fq[priv->num_fqs].type = DPAA2_RX_ERR_FQ;
3356	priv->fq[priv->num_fqs++].consume = dpaa2_eth_rx_err;
3357
3358	/* For each FQ, decide on which core to process incoming frames */
3359	dpaa2_eth_set_fq_affinity(priv);
3360	}
3361
3362	/* Allocate and configure a buffer pool */
3363	struct dpaa2_eth_bp *dpaa2_eth_allocate_dpbp(struct dpaa2_eth_priv *priv)
3364	{
3365	struct device *dev = priv->net_dev->dev.parent;
3366	struct fsl_mc_device *dpbp_dev;
3367	struct dpbp_attr dpbp_attrs;
3368	struct dpaa2_eth_bp *bp;
3369	int err;
3370
3371	err = fsl_mc_object_allocate(to_fsl_mc_device(dev), pool_type: FSL_MC_POOL_DPBP,
3372	new_mc_adev: &dpbp_dev);
3373	if (err) {
3374	if (err == -ENXIO)
3375	err = -EPROBE_DEFER;
3376	else
3377	dev_err(dev, "DPBP device allocation failed\n");
3378	return ERR_PTR(error: err);
3379	}
3380
3381	bp = kzalloc(size: sizeof(*bp), GFP_KERNEL);
3382	if (!bp) {
3383	err = -ENOMEM;
3384	goto err_alloc;
3385	}
3386
3387	err = dpbp_open(mc_io: priv->mc_io, cmd_flags: 0, dpbp_id: dpbp_dev->obj_desc.id,
3388	token: &dpbp_dev->mc_handle);
3389	if (err) {
3390	dev_err(dev, "dpbp_open() failed\n");
3391	goto err_open;
3392	}
3393
3394	err = dpbp_reset(mc_io: priv->mc_io, cmd_flags: 0, token: dpbp_dev->mc_handle);
3395	if (err) {
3396	dev_err(dev, "dpbp_reset() failed\n");
3397	goto err_reset;
3398	}
3399
3400	err = dpbp_enable(mc_io: priv->mc_io, cmd_flags: 0, token: dpbp_dev->mc_handle);
3401	if (err) {
3402	dev_err(dev, "dpbp_enable() failed\n");
3403	goto err_enable;
3404	}
3405
3406	err = dpbp_get_attributes(mc_io: priv->mc_io, cmd_flags: 0, token: dpbp_dev->mc_handle,
3407	attr: &dpbp_attrs);
3408	if (err) {
3409	dev_err(dev, "dpbp_get_attributes() failed\n");
3410	goto err_get_attr;
3411	}
3412
3413	bp->dev = dpbp_dev;
3414	bp->bpid = dpbp_attrs.bpid;
3415
3416	return bp;
3417
3418	err_get_attr:
3419	dpbp_disable(mc_io: priv->mc_io, cmd_flags: 0, token: dpbp_dev->mc_handle);
3420	err_enable:
3421	err_reset:
3422	dpbp_close(mc_io: priv->mc_io, cmd_flags: 0, token: dpbp_dev->mc_handle);
3423	err_open:
3424	kfree(objp: bp);
3425	err_alloc:
3426	fsl_mc_object_free(mc_adev: dpbp_dev);
3427
3428	return ERR_PTR(error: err);
3429	}
3430
3431	static int dpaa2_eth_setup_default_dpbp(struct dpaa2_eth_priv *priv)
3432	{
3433	struct dpaa2_eth_bp *bp;
3434	int i;
3435
3436	bp = dpaa2_eth_allocate_dpbp(priv);
3437	if (IS_ERR(ptr: bp))
3438	return PTR_ERR(ptr: bp);
3439
3440	priv->bp[DPAA2_ETH_DEFAULT_BP_IDX] = bp;
3441	priv->num_bps++;
3442
3443	for (i = 0; i < priv->num_channels; i++)
3444	priv->channel[i]->bp = bp;
3445
3446	return 0;
3447	}
3448
3449	void dpaa2_eth_free_dpbp(struct dpaa2_eth_priv *priv, struct dpaa2_eth_bp *bp)
3450	{
3451	int idx_bp;
3452
3453	/* Find the index at which this BP is stored */
3454	for (idx_bp = 0; idx_bp < priv->num_bps; idx_bp++)
3455	if (priv->bp[idx_bp] == bp)
3456	break;
3457
3458	/* Drain the pool and disable the associated MC object */
3459	dpaa2_eth_drain_pool(priv, bpid: bp->bpid);
3460	dpbp_disable(mc_io: priv->mc_io, cmd_flags: 0, token: bp->dev->mc_handle);
3461	dpbp_close(mc_io: priv->mc_io, cmd_flags: 0, token: bp->dev->mc_handle);
3462	fsl_mc_object_free(mc_adev: bp->dev);
3463	kfree(objp: bp);
3464
3465	/* Move the last in use DPBP over in this position */
3466	priv->bp[idx_bp] = priv->bp[priv->num_bps - 1];
3467	priv->num_bps--;
3468	}
3469
3470	static void dpaa2_eth_free_dpbps(struct dpaa2_eth_priv *priv)
3471	{
3472	int i;
3473
3474	for (i = 0; i < priv->num_bps; i++)
3475	dpaa2_eth_free_dpbp(priv, bp: priv->bp[i]);
3476	}
3477
3478	static int dpaa2_eth_set_buffer_layout(struct dpaa2_eth_priv *priv)
3479	{
3480	struct device *dev = priv->net_dev->dev.parent;
3481	struct dpni_buffer_layout buf_layout = {0};
3482	u16 rx_buf_align;
3483	int err;
3484
3485	/* We need to check for WRIOP version 1.0.0, but depending on the MC
3486	* version, this number is not always provided correctly on rev1.
3487	* We need to check for both alternatives in this situation.
3488	*/
3489	if (priv->dpni_attrs.wriop_version == DPAA2_WRIOP_VERSION(0, 0, 0) ||
3490	priv->dpni_attrs.wriop_version == DPAA2_WRIOP_VERSION(1, 0, 0))
3491	rx_buf_align = DPAA2_ETH_RX_BUF_ALIGN_REV1;
3492	else
3493	rx_buf_align = DPAA2_ETH_RX_BUF_ALIGN;
3494
3495	/* We need to ensure that the buffer size seen by WRIOP is a multiple
3496	* of 64 or 256 bytes depending on the WRIOP version.
3497	*/
3498	priv->rx_buf_size = ALIGN_DOWN(DPAA2_ETH_RX_BUF_SIZE, rx_buf_align);
3499
3500	/* tx buffer */
3501	buf_layout.private_data_size = DPAA2_ETH_SWA_SIZE;
3502	buf_layout.pass_timestamp = true;
3503	buf_layout.pass_frame_status = true;
3504	buf_layout.options = DPNI_BUF_LAYOUT_OPT_PRIVATE_DATA_SIZE |
3505	DPNI_BUF_LAYOUT_OPT_TIMESTAMP |
3506	DPNI_BUF_LAYOUT_OPT_FRAME_STATUS;
3507	err = dpni_set_buffer_layout(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3508	qtype: DPNI_QUEUE_TX, layout: &buf_layout);
3509	if (err) {
3510	dev_err(dev, "dpni_set_buffer_layout(TX) failed\n");
3511	return err;
3512	}
3513
3514	/* tx-confirm buffer */
3515	buf_layout.options = DPNI_BUF_LAYOUT_OPT_TIMESTAMP |
3516	DPNI_BUF_LAYOUT_OPT_FRAME_STATUS;
3517	err = dpni_set_buffer_layout(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3518	qtype: DPNI_QUEUE_TX_CONFIRM, layout: &buf_layout);
3519	if (err) {
3520	dev_err(dev, "dpni_set_buffer_layout(TX_CONF) failed\n");
3521	return err;
3522	}
3523
3524	/* Now that we've set our tx buffer layout, retrieve the minimum
3525	* required tx data offset.
3526	*/
3527	err = dpni_get_tx_data_offset(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3528	data_offset: &priv->tx_data_offset);
3529	if (err) {
3530	dev_err(dev, "dpni_get_tx_data_offset() failed\n");
3531	return err;
3532	}
3533
3534	if ((priv->tx_data_offset % 64) != 0)
3535	dev_warn(dev, "Tx data offset (%d) not a multiple of 64B\n",
3536	priv->tx_data_offset);
3537
3538	/* rx buffer */
3539	buf_layout.pass_frame_status = true;
3540	buf_layout.pass_parser_result = true;
3541	buf_layout.data_align = rx_buf_align;
3542	buf_layout.data_head_room = dpaa2_eth_rx_head_room(priv);
3543	buf_layout.private_data_size = 0;
3544	buf_layout.options = DPNI_BUF_LAYOUT_OPT_PARSER_RESULT |
3545	DPNI_BUF_LAYOUT_OPT_FRAME_STATUS |
3546	DPNI_BUF_LAYOUT_OPT_DATA_ALIGN |
3547	DPNI_BUF_LAYOUT_OPT_DATA_HEAD_ROOM |
3548	DPNI_BUF_LAYOUT_OPT_TIMESTAMP;
3549	err = dpni_set_buffer_layout(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3550	qtype: DPNI_QUEUE_RX, layout: &buf_layout);
3551	if (err) {
3552	dev_err(dev, "dpni_set_buffer_layout(RX) failed\n");
3553	return err;
3554	}
3555
3556	return 0;
3557	}
3558
3559	#define DPNI_ENQUEUE_FQID_VER_MAJOR 7
3560	#define DPNI_ENQUEUE_FQID_VER_MINOR 9
3561
3562	static inline int dpaa2_eth_enqueue_qd(struct dpaa2_eth_priv *priv,
3563	struct dpaa2_eth_fq *fq,
3564	struct dpaa2_fd *fd, u8 prio,
3565	u32 num_frames __always_unused,
3566	int *frames_enqueued)
3567	{
3568	int err;
3569
3570	err = dpaa2_io_service_enqueue_qd(d: fq->channel->dpio,
3571	qdid: priv->tx_qdid, prio,
3572	qdbin: fq->tx_qdbin, fd);
3573	if (!err && frames_enqueued)
3574	*frames_enqueued = 1;
3575	return err;
3576	}
3577
3578	static inline int dpaa2_eth_enqueue_fq_multiple(struct dpaa2_eth_priv *priv,
3579	struct dpaa2_eth_fq *fq,
3580	struct dpaa2_fd *fd,
3581	u8 prio, u32 num_frames,
3582	int *frames_enqueued)
3583	{
3584	int err;
3585
3586	err = dpaa2_io_service_enqueue_multiple_fq(d: fq->channel->dpio,
3587	fqid: fq->tx_fqid[prio],
3588	fd, number_of_frame: num_frames);
3589
3590	if (err == 0)
3591	return -EBUSY;
3592
3593	if (frames_enqueued)
3594	*frames_enqueued = err;
3595	return 0;
3596	}
3597
3598	static void dpaa2_eth_set_enqueue_mode(struct dpaa2_eth_priv *priv)
3599	{
3600	if (dpaa2_eth_cmp_dpni_ver(priv, DPNI_ENQUEUE_FQID_VER_MAJOR,
3601	DPNI_ENQUEUE_FQID_VER_MINOR) < 0)
3602	priv->enqueue = dpaa2_eth_enqueue_qd;
3603	else
3604	priv->enqueue = dpaa2_eth_enqueue_fq_multiple;
3605	}
3606
3607	static int dpaa2_eth_set_pause(struct dpaa2_eth_priv *priv)
3608	{
3609	struct device *dev = priv->net_dev->dev.parent;
3610	struct dpni_link_cfg link_cfg = {0};
3611	int err;
3612
3613	/* Get the default link options so we don't override other flags */
3614	err = dpni_get_link_cfg(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, cfg: &link_cfg);
3615	if (err) {
3616	dev_err(dev, "dpni_get_link_cfg() failed\n");
3617	return err;
3618	}
3619
3620	/* By default, enable both Rx and Tx pause frames */
3621	link_cfg.options |= DPNI_LINK_OPT_PAUSE;
3622	link_cfg.options &= ~DPNI_LINK_OPT_ASYM_PAUSE;
3623	err = dpni_set_link_cfg(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, cfg: &link_cfg);
3624	if (err) {
3625	dev_err(dev, "dpni_set_link_cfg() failed\n");
3626	return err;
3627	}
3628
3629	priv->link_state.options = link_cfg.options;
3630
3631	return 0;
3632	}
3633
3634	static void dpaa2_eth_update_tx_fqids(struct dpaa2_eth_priv *priv)
3635	{
3636	struct dpni_queue_id qid = {0};
3637	struct dpaa2_eth_fq *fq;
3638	struct dpni_queue queue;
3639	int i, j, err;
3640
3641	/* We only use Tx FQIDs for FQID-based enqueue, so check
3642	* if DPNI version supports it before updating FQIDs
3643	*/
3644	if (dpaa2_eth_cmp_dpni_ver(priv, DPNI_ENQUEUE_FQID_VER_MAJOR,
3645	DPNI_ENQUEUE_FQID_VER_MINOR) < 0)
3646	return;
3647
3648	for (i = 0; i < priv->num_fqs; i++) {
3649	fq = &priv->fq[i];
3650	if (fq->type != DPAA2_TX_CONF_FQ)
3651	continue;
3652	for (j = 0; j < dpaa2_eth_tc_count(priv); j++) {
3653	err = dpni_get_queue(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3654	qtype: DPNI_QUEUE_TX, tc: j, index: fq->flowid,
3655	queue: &queue, qid: &qid);
3656	if (err)
3657	goto out_err;
3658
3659	fq->tx_fqid[j] = qid.fqid;
3660	if (fq->tx_fqid[j] == 0)
3661	goto out_err;
3662	}
3663	}
3664
3665	priv->enqueue = dpaa2_eth_enqueue_fq_multiple;
3666
3667	return;
3668
3669	out_err:
3670	netdev_info(dev: priv->net_dev,
3671	format: "Error reading Tx FQID, fallback to QDID-based enqueue\n");
3672	priv->enqueue = dpaa2_eth_enqueue_qd;
3673	}
3674
3675	/* Configure ingress classification based on VLAN PCP */
3676	static int dpaa2_eth_set_vlan_qos(struct dpaa2_eth_priv *priv)
3677	{
3678	struct device *dev = priv->net_dev->dev.parent;
3679	struct dpkg_profile_cfg kg_cfg = {0};
3680	struct dpni_qos_tbl_cfg qos_cfg = {0};
3681	struct dpni_rule_cfg key_params;
3682	void *dma_mem, *key, *mask;
3683	u8 key_size = 2; /* VLAN TCI field */
3684	int i, pcp, err;
3685
3686	/* VLAN-based classification only makes sense if we have multiple
3687	* traffic classes.
3688	* Also, we need to extract just the 3-bit PCP field from the VLAN
3689	* header and we can only do that by using a mask
3690	*/
3691	if (dpaa2_eth_tc_count(priv) == 1 || !dpaa2_eth_fs_mask_enabled(priv)) {
3692	dev_dbg(dev, "VLAN-based QoS classification not supported\n");
3693	return -EOPNOTSUPP;
3694	}
3695
3696	dma_mem = kzalloc(DPAA2_CLASSIFIER_DMA_SIZE, GFP_KERNEL);
3697	if (!dma_mem)
3698	return -ENOMEM;
3699
3700	kg_cfg.num_extracts = 1;
3701	kg_cfg.extracts[0].type = DPKG_EXTRACT_FROM_HDR;
3702	kg_cfg.extracts[0].extract.from_hdr.prot = NET_PROT_VLAN;
3703	kg_cfg.extracts[0].extract.from_hdr.type = DPKG_FULL_FIELD;
3704	kg_cfg.extracts[0].extract.from_hdr.field = NH_FLD_VLAN_TCI;
3705
3706	err = dpni_prepare_key_cfg(cfg: &kg_cfg, key_cfg_buf: dma_mem);
3707	if (err) {
3708	dev_err(dev, "dpni_prepare_key_cfg failed\n");
3709	goto out_free_tbl;
3710	}
3711
3712	/* set QoS table */
3713	qos_cfg.default_tc = 0;
3714	qos_cfg.discard_on_miss = 0;
3715	qos_cfg.key_cfg_iova = dma_map_single(dev, dma_mem,
3716	DPAA2_CLASSIFIER_DMA_SIZE,
3717	DMA_TO_DEVICE);
3718	if (dma_mapping_error(dev, dma_addr: qos_cfg.key_cfg_iova)) {
3719	dev_err(dev, "QoS table DMA mapping failed\n");
3720	err = -ENOMEM;
3721	goto out_free_tbl;
3722	}
3723
3724	err = dpni_set_qos_table(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, cfg: &qos_cfg);
3725	if (err) {
3726	dev_err(dev, "dpni_set_qos_table failed\n");
3727	goto out_unmap_tbl;
3728	}
3729
3730	/* Add QoS table entries */
3731	key = kzalloc(size: key_size * 2, GFP_KERNEL);
3732	if (!key) {
3733	err = -ENOMEM;
3734	goto out_unmap_tbl;
3735	}
3736	mask = key + key_size;
3737	*(__be16 *)mask = cpu_to_be16(VLAN_PRIO_MASK);
3738
3739	key_params.key_iova = dma_map_single(dev, key, key_size * 2,
3740	DMA_TO_DEVICE);
3741	if (dma_mapping_error(dev, dma_addr: key_params.key_iova)) {
3742	dev_err(dev, "Qos table entry DMA mapping failed\n");
3743	err = -ENOMEM;
3744	goto out_free_key;
3745	}
3746
3747	key_params.mask_iova = key_params.key_iova + key_size;
3748	key_params.key_size = key_size;
3749
3750	/* We add rules for PCP-based distribution starting with highest
3751	* priority (VLAN PCP = 7). If this DPNI doesn't have enough traffic
3752	* classes to accommodate all priority levels, the lowest ones end up
3753	* on TC 0 which was configured as default
3754	*/
3755	for (i = dpaa2_eth_tc_count(priv) - 1, pcp = 7; i >= 0; i--, pcp--) {
3756	*(__be16 *)key = cpu_to_be16(pcp << VLAN_PRIO_SHIFT);
3757	dma_sync_single_for_device(dev, addr: key_params.key_iova,
3758	size: key_size * 2, dir: DMA_TO_DEVICE);
3759
3760	err = dpni_add_qos_entry(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3761	cfg: &key_params, tc_id: i, index: i);
3762	if (err) {
3763	dev_err(dev, "dpni_add_qos_entry failed\n");
3764	dpni_clear_qos_table(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token);
3765	goto out_unmap_key;
3766	}
3767	}
3768
3769	priv->vlan_cls_enabled = true;
3770
3771	/* Table and key memory is not persistent, clean everything up after
3772	* configuration is finished
3773	*/
3774	out_unmap_key:
3775	dma_unmap_single(dev, key_params.key_iova, key_size * 2, DMA_TO_DEVICE);
3776	out_free_key:
3777	kfree(objp: key);
3778	out_unmap_tbl:
3779	dma_unmap_single(dev, qos_cfg.key_cfg_iova, DPAA2_CLASSIFIER_DMA_SIZE,
3780	DMA_TO_DEVICE);
3781	out_free_tbl:
3782	kfree(objp: dma_mem);
3783
3784	return err;
3785	}
3786
3787	/* Configure the DPNI object this interface is associated with */
3788	static int dpaa2_eth_setup_dpni(struct fsl_mc_device *ls_dev)
3789	{
3790	struct device *dev = &ls_dev->dev;
3791	struct dpaa2_eth_priv *priv;
3792	struct net_device *net_dev;
3793	int err;
3794
3795	net_dev = dev_get_drvdata(dev);
3796	priv = netdev_priv(dev: net_dev);
3797
3798	/* get a handle for the DPNI object */
3799	err = dpni_open(mc_io: priv->mc_io, cmd_flags: 0, dpni_id: ls_dev->obj_desc.id, token: &priv->mc_token);
3800	if (err) {
3801	dev_err(dev, "dpni_open() failed\n");
3802	return err;
3803	}
3804
3805	/* Check if we can work with this DPNI object */
3806	err = dpni_get_api_version(mc_io: priv->mc_io, cmd_flags: 0, major_ver: &priv->dpni_ver_major,
3807	minor_ver: &priv->dpni_ver_minor);
3808	if (err) {
3809	dev_err(dev, "dpni_get_api_version() failed\n");
3810	goto close;
3811	}
3812	if (dpaa2_eth_cmp_dpni_ver(priv, DPNI_VER_MAJOR, DPNI_VER_MINOR) < 0) {
3813	dev_err(dev, "DPNI version %u.%u not supported, need >= %u.%u\n",
3814	priv->dpni_ver_major, priv->dpni_ver_minor,
3815	DPNI_VER_MAJOR, DPNI_VER_MINOR);
3816	err = -EOPNOTSUPP;
3817	goto close;
3818	}
3819
3820	ls_dev->mc_io = priv->mc_io;
3821	ls_dev->mc_handle = priv->mc_token;
3822
3823	err = dpni_reset(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token);
3824	if (err) {
3825	dev_err(dev, "dpni_reset() failed\n");
3826	goto close;
3827	}
3828
3829	err = dpni_get_attributes(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3830	attr: &priv->dpni_attrs);
3831	if (err) {
3832	dev_err(dev, "dpni_get_attributes() failed (err=%d)\n", err);
3833	goto close;
3834	}
3835
3836	err = dpaa2_eth_set_buffer_layout(priv);
3837	if (err)
3838	goto close;
3839
3840	dpaa2_eth_set_enqueue_mode(priv);
3841
3842	/* Enable pause frame support */
3843	if (dpaa2_eth_has_pause_support(priv)) {
3844	err = dpaa2_eth_set_pause(priv);
3845	if (err)
3846	goto close;
3847	}
3848
3849	err = dpaa2_eth_set_vlan_qos(priv);
3850	if (err && err != -EOPNOTSUPP)
3851	goto close;
3852
3853	priv->cls_rules = devm_kcalloc(dev, dpaa2_eth_fs_count(priv),
3854	size: sizeof(struct dpaa2_eth_cls_rule),
3855	GFP_KERNEL);
3856	if (!priv->cls_rules) {
3857	err = -ENOMEM;
3858	goto close;
3859	}
3860
3861	return 0;
3862
3863	close:
3864	dpni_close(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token);
3865
3866	return err;
3867	}
3868
3869	static void dpaa2_eth_free_dpni(struct dpaa2_eth_priv *priv)
3870	{
3871	int err;
3872
3873	err = dpni_reset(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token);
3874	if (err)
3875	netdev_warn(dev: priv->net_dev, format: "dpni_reset() failed (err %d)\n",
3876	err);
3877
3878	dpni_close(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token);
3879	}
3880
3881	static int dpaa2_eth_setup_rx_flow(struct dpaa2_eth_priv *priv,
3882	struct dpaa2_eth_fq *fq)
3883	{
3884	struct device *dev = priv->net_dev->dev.parent;
3885	struct dpni_queue queue;
3886	struct dpni_queue_id qid;
3887	int err;
3888
3889	err = dpni_get_queue(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3890	qtype: DPNI_QUEUE_RX, tc: fq->tc, index: fq->flowid, queue: &queue, qid: &qid);
3891	if (err) {
3892	dev_err(dev, "dpni_get_queue(RX) failed\n");
3893	return err;
3894	}
3895
3896	fq->fqid = qid.fqid;
3897
3898	queue.destination.id = fq->channel->dpcon_id;
3899	queue.destination.type = DPNI_DEST_DPCON;
3900	queue.destination.priority = 1;
3901	queue.user_context = (u64)(uintptr_t)fq;
3902	err = dpni_set_queue(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3903	qtype: DPNI_QUEUE_RX, tc: fq->tc, index: fq->flowid,
3904	DPNI_QUEUE_OPT_USER_CTX | DPNI_QUEUE_OPT_DEST,
3905	queue: &queue);
3906	if (err) {
3907	dev_err(dev, "dpni_set_queue(RX) failed\n");
3908	return err;
3909	}
3910
3911	/* xdp_rxq setup */
3912	/* only once for each channel */
3913	if (fq->tc > 0)
3914	return 0;
3915
3916	err = xdp_rxq_info_reg(xdp_rxq: &fq->channel->xdp_rxq, dev: priv->net_dev,
3917	queue_index: fq->flowid, napi_id: 0);
3918	if (err) {
3919	dev_err(dev, "xdp_rxq_info_reg failed\n");
3920	return err;
3921	}
3922
3923	err = xdp_rxq_info_reg_mem_model(xdp_rxq: &fq->channel->xdp_rxq,
3924	type: MEM_TYPE_PAGE_ORDER0, NULL);
3925	if (err) {
3926	dev_err(dev, "xdp_rxq_info_reg_mem_model failed\n");
3927	return err;
3928	}
3929
3930	return 0;
3931	}
3932
3933	static int dpaa2_eth_setup_tx_flow(struct dpaa2_eth_priv *priv,
3934	struct dpaa2_eth_fq *fq)
3935	{
3936	struct device *dev = priv->net_dev->dev.parent;
3937	struct dpni_queue queue;
3938	struct dpni_queue_id qid;
3939	int i, err;
3940
3941	for (i = 0; i < dpaa2_eth_tc_count(priv); i++) {
3942	err = dpni_get_queue(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3943	qtype: DPNI_QUEUE_TX, tc: i, index: fq->flowid,
3944	queue: &queue, qid: &qid);
3945	if (err) {
3946	dev_err(dev, "dpni_get_queue(TX) failed\n");
3947	return err;
3948	}
3949	fq->tx_fqid[i] = qid.fqid;
3950	}
3951
3952	/* All Tx queues belonging to the same flowid have the same qdbin */
3953	fq->tx_qdbin = qid.qdbin;
3954
3955	err = dpni_get_queue(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3956	qtype: DPNI_QUEUE_TX_CONFIRM, tc: 0, index: fq->flowid,
3957	queue: &queue, qid: &qid);
3958	if (err) {
3959	dev_err(dev, "dpni_get_queue(TX_CONF) failed\n");
3960	return err;
3961	}
3962
3963	fq->fqid = qid.fqid;
3964
3965	queue.destination.id = fq->channel->dpcon_id;
3966	queue.destination.type = DPNI_DEST_DPCON;
3967	queue.destination.priority = 0;
3968	queue.user_context = (u64)(uintptr_t)fq;
3969	err = dpni_set_queue(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3970	qtype: DPNI_QUEUE_TX_CONFIRM, tc: 0, index: fq->flowid,
3971	DPNI_QUEUE_OPT_USER_CTX | DPNI_QUEUE_OPT_DEST,
3972	queue: &queue);
3973	if (err) {
3974	dev_err(dev, "dpni_set_queue(TX_CONF) failed\n");
3975	return err;
3976	}
3977
3978	return 0;
3979	}
3980
3981	static int setup_rx_err_flow(struct dpaa2_eth_priv *priv,
3982	struct dpaa2_eth_fq *fq)
3983	{
3984	struct device *dev = priv->net_dev->dev.parent;
3985	struct dpni_queue q = { { 0 } };
3986	struct dpni_queue_id qid;
3987	u8 q_opt = DPNI_QUEUE_OPT_USER_CTX | DPNI_QUEUE_OPT_DEST;
3988	int err;
3989
3990	err = dpni_get_queue(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
3991	qtype: DPNI_QUEUE_RX_ERR, tc: 0, index: 0, queue: &q, qid: &qid);
3992	if (err) {
3993	dev_err(dev, "dpni_get_queue() failed (%d)\n", err);
3994	return err;
3995	}
3996
3997	fq->fqid = qid.fqid;
3998
3999	q.destination.id = fq->channel->dpcon_id;
4000	q.destination.type = DPNI_DEST_DPCON;
4001	q.destination.priority = 1;
4002	q.user_context = (u64)(uintptr_t)fq;
4003	err = dpni_set_queue(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
4004	qtype: DPNI_QUEUE_RX_ERR, tc: 0, index: 0, options: q_opt, queue: &q);
4005	if (err) {
4006	dev_err(dev, "dpni_set_queue() failed (%d)\n", err);
4007	return err;
4008	}
4009
4010	return 0;
4011	}
4012
4013	/* Supported header fields for Rx hash distribution key */
4014	static const struct dpaa2_eth_dist_fields dist_fields[] = {
4015	{
4016	/* L2 header */
4017	.rxnfc_field = RXH_L2DA,
4018	.cls_prot = NET_PROT_ETH,
4019	.cls_field = NH_FLD_ETH_DA,
4020	.id = DPAA2_ETH_DIST_ETHDST,
4021	.size = 6,
4022	}, {
4023	.cls_prot = NET_PROT_ETH,
4024	.cls_field = NH_FLD_ETH_SA,
4025	.id = DPAA2_ETH_DIST_ETHSRC,
4026	.size = 6,
4027	}, {
4028	/* This is the last ethertype field parsed:
4029	* depending on frame format, it can be the MAC ethertype
4030	* or the VLAN etype.
4031	*/
4032	.cls_prot = NET_PROT_ETH,
4033	.cls_field = NH_FLD_ETH_TYPE,
4034	.id = DPAA2_ETH_DIST_ETHTYPE,
4035	.size = 2,
4036	}, {
4037	/* VLAN header */
4038	.rxnfc_field = RXH_VLAN,
4039	.cls_prot = NET_PROT_VLAN,
4040	.cls_field = NH_FLD_VLAN_TCI,
4041	.id = DPAA2_ETH_DIST_VLAN,
4042	.size = 2,
4043	}, {
4044	/* IP header */
4045	.rxnfc_field = RXH_IP_SRC,
4046	.cls_prot = NET_PROT_IP,
4047	.cls_field = NH_FLD_IP_SRC,
4048	.id = DPAA2_ETH_DIST_IPSRC,
4049	.size = 4,
4050	}, {
4051	.rxnfc_field = RXH_IP_DST,
4052	.cls_prot = NET_PROT_IP,
4053	.cls_field = NH_FLD_IP_DST,
4054	.id = DPAA2_ETH_DIST_IPDST,
4055	.size = 4,
4056	}, {
4057	.rxnfc_field = RXH_L3_PROTO,
4058	.cls_prot = NET_PROT_IP,
4059	.cls_field = NH_FLD_IP_PROTO,
4060	.id = DPAA2_ETH_DIST_IPPROTO,
4061	.size = 1,
4062	}, {
4063	/* Using UDP ports, this is functionally equivalent to raw
4064	* byte pairs from L4 header.
4065	*/
4066	.rxnfc_field = RXH_L4_B_0_1,
4067	.cls_prot = NET_PROT_UDP,
4068	.cls_field = NH_FLD_UDP_PORT_SRC,
4069	.id = DPAA2_ETH_DIST_L4SRC,
4070	.size = 2,
4071	}, {
4072	.rxnfc_field = RXH_L4_B_2_3,
4073	.cls_prot = NET_PROT_UDP,
4074	.cls_field = NH_FLD_UDP_PORT_DST,
4075	.id = DPAA2_ETH_DIST_L4DST,
4076	.size = 2,
4077	},
4078	};
4079
4080	/* Configure the Rx hash key using the legacy API */
4081	static int dpaa2_eth_config_legacy_hash_key(struct dpaa2_eth_priv *priv, dma_addr_t key)
4082	{
4083	struct device *dev = priv->net_dev->dev.parent;
4084	struct dpni_rx_tc_dist_cfg dist_cfg;
4085	int i, err = 0;
4086
4087	memset(&dist_cfg, 0, sizeof(dist_cfg));
4088
4089	dist_cfg.key_cfg_iova = key;
4090	dist_cfg.dist_size = dpaa2_eth_queue_count(priv);
4091	dist_cfg.dist_mode = DPNI_DIST_MODE_HASH;
4092
4093	for (i = 0; i < dpaa2_eth_tc_count(priv); i++) {
4094	err = dpni_set_rx_tc_dist(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
4095	tc_id: i, cfg: &dist_cfg);
4096	if (err) {
4097	dev_err(dev, "dpni_set_rx_tc_dist failed\n");
4098	break;
4099	}
4100	}
4101
4102	return err;
4103	}
4104
4105	/* Configure the Rx hash key using the new API */
4106	static int dpaa2_eth_config_hash_key(struct dpaa2_eth_priv *priv, dma_addr_t key)
4107	{
4108	struct device *dev = priv->net_dev->dev.parent;
4109	struct dpni_rx_dist_cfg dist_cfg;
4110	int i, err = 0;
4111
4112	memset(&dist_cfg, 0, sizeof(dist_cfg));
4113
4114	dist_cfg.key_cfg_iova = key;
4115	dist_cfg.dist_size = dpaa2_eth_queue_count(priv);
4116	dist_cfg.enable = 1;
4117
4118	for (i = 0; i < dpaa2_eth_tc_count(priv); i++) {
4119	dist_cfg.tc = i;
4120	err = dpni_set_rx_hash_dist(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
4121	cfg: &dist_cfg);
4122	if (err) {
4123	dev_err(dev, "dpni_set_rx_hash_dist failed\n");
4124	break;
4125	}
4126
4127	/* If the flow steering / hashing key is shared between all
4128	* traffic classes, install it just once
4129	*/
4130	if (priv->dpni_attrs.options & DPNI_OPT_SHARED_FS)
4131	break;
4132	}
4133
4134	return err;
4135	}
4136
4137	/* Configure the Rx flow classification key */
4138	static int dpaa2_eth_config_cls_key(struct dpaa2_eth_priv *priv, dma_addr_t key)
4139	{
4140	struct device *dev = priv->net_dev->dev.parent;
4141	struct dpni_rx_dist_cfg dist_cfg;
4142	int i, err = 0;
4143
4144	memset(&dist_cfg, 0, sizeof(dist_cfg));
4145
4146	dist_cfg.key_cfg_iova = key;
4147	dist_cfg.dist_size = dpaa2_eth_queue_count(priv);
4148	dist_cfg.enable = 1;
4149
4150	for (i = 0; i < dpaa2_eth_tc_count(priv); i++) {
4151	dist_cfg.tc = i;
4152	err = dpni_set_rx_fs_dist(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
4153	cfg: &dist_cfg);
4154	if (err) {
4155	dev_err(dev, "dpni_set_rx_fs_dist failed\n");
4156	break;
4157	}
4158
4159	/* If the flow steering / hashing key is shared between all
4160	* traffic classes, install it just once
4161	*/
4162	if (priv->dpni_attrs.options & DPNI_OPT_SHARED_FS)
4163	break;
4164	}
4165
4166	return err;
4167	}
4168
4169	/* Size of the Rx flow classification key */
4170	int dpaa2_eth_cls_key_size(u64 fields)
4171	{
4172	int i, size = 0;
4173
4174	for (i = 0; i < ARRAY_SIZE(dist_fields); i++) {
4175	if (!(fields & dist_fields[i].id))
4176	continue;
4177	size += dist_fields[i].size;
4178	}
4179
4180	return size;
4181	}
4182
4183	/* Offset of header field in Rx classification key */
4184	int dpaa2_eth_cls_fld_off(int prot, int field)
4185	{
4186	int i, off = 0;
4187
4188	for (i = 0; i < ARRAY_SIZE(dist_fields); i++) {
4189	if (dist_fields[i].cls_prot == prot &&
4190	dist_fields[i].cls_field == field)
4191	return off;
4192	off += dist_fields[i].size;
4193	}
4194
4195	WARN_ONCE(1, "Unsupported header field used for Rx flow cls\n");
4196	return 0;
4197	}
4198
4199	/* Prune unused fields from the classification rule.
4200	* Used when masking is not supported
4201	*/
4202	void dpaa2_eth_cls_trim_rule(void *key_mem, u64 fields)
4203	{
4204	int off = 0, new_off = 0;
4205	int i, size;
4206
4207	for (i = 0; i < ARRAY_SIZE(dist_fields); i++) {
4208	size = dist_fields[i].size;
4209	if (dist_fields[i].id & fields) {
4210	memcpy(key_mem + new_off, key_mem + off, size);
4211	new_off += size;
4212	}
4213	off += size;
4214	}
4215	}
4216
4217	/* Set Rx distribution (hash or flow classification) key
4218	* flags is a combination of RXH_ bits
4219	*/
4220	static int dpaa2_eth_set_dist_key(struct net_device *net_dev,
4221	enum dpaa2_eth_rx_dist type, u64 flags)
4222	{
4223	struct device *dev = net_dev->dev.parent;
4224	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
4225	struct dpkg_profile_cfg cls_cfg;
4226	u32 rx_hash_fields = 0;
4227	dma_addr_t key_iova;
4228	u8 *dma_mem;
4229	int i;
4230	int err = 0;
4231
4232	memset(&cls_cfg, 0, sizeof(cls_cfg));
4233
4234	for (i = 0; i < ARRAY_SIZE(dist_fields); i++) {
4235	struct dpkg_extract *key =
4236	&cls_cfg.extracts[cls_cfg.num_extracts];
4237
4238	/* For both Rx hashing and classification keys
4239	* we set only the selected fields.
4240	*/
4241	if (!(flags & dist_fields[i].id))
4242	continue;
4243	if (type == DPAA2_ETH_RX_DIST_HASH)
4244	rx_hash_fields |= dist_fields[i].rxnfc_field;
4245
4246	if (cls_cfg.num_extracts >= DPKG_MAX_NUM_OF_EXTRACTS) {
4247	dev_err(dev, "error adding key extraction rule, too many rules?\n");
4248	return -E2BIG;
4249	}
4250
4251	key->type = DPKG_EXTRACT_FROM_HDR;
4252	key->extract.from_hdr.prot = dist_fields[i].cls_prot;
4253	key->extract.from_hdr.type = DPKG_FULL_FIELD;
4254	key->extract.from_hdr.field = dist_fields[i].cls_field;
4255	cls_cfg.num_extracts++;
4256	}
4257
4258	dma_mem = kzalloc(DPAA2_CLASSIFIER_DMA_SIZE, GFP_KERNEL);
4259	if (!dma_mem)
4260	return -ENOMEM;
4261
4262	err = dpni_prepare_key_cfg(cfg: &cls_cfg, key_cfg_buf: dma_mem);
4263	if (err) {
4264	dev_err(dev, "dpni_prepare_key_cfg error %d\n", err);
4265	goto free_key;
4266	}
4267
4268	/* Prepare for setting the rx dist */
4269	key_iova = dma_map_single(dev, dma_mem, DPAA2_CLASSIFIER_DMA_SIZE,
4270	DMA_TO_DEVICE);
4271	if (dma_mapping_error(dev, dma_addr: key_iova)) {
4272	dev_err(dev, "DMA mapping failed\n");
4273	err = -ENOMEM;
4274	goto free_key;
4275	}
4276
4277	if (type == DPAA2_ETH_RX_DIST_HASH) {
4278	if (dpaa2_eth_has_legacy_dist(priv))
4279	err = dpaa2_eth_config_legacy_hash_key(priv, key: key_iova);
4280	else
4281	err = dpaa2_eth_config_hash_key(priv, key: key_iova);
4282	} else {
4283	err = dpaa2_eth_config_cls_key(priv, key: key_iova);
4284	}
4285
4286	dma_unmap_single(dev, key_iova, DPAA2_CLASSIFIER_DMA_SIZE,
4287	DMA_TO_DEVICE);
4288	if (!err && type == DPAA2_ETH_RX_DIST_HASH)
4289	priv->rx_hash_fields = rx_hash_fields;
4290
4291	free_key:
4292	kfree(objp: dma_mem);
4293	return err;
4294	}
4295
4296	int dpaa2_eth_set_hash(struct net_device *net_dev, u64 flags)
4297	{
4298	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
4299	u64 key = 0;
4300	int i;
4301
4302	if (!dpaa2_eth_hash_enabled(priv))
4303	return -EOPNOTSUPP;
4304
4305	for (i = 0; i < ARRAY_SIZE(dist_fields); i++)
4306	if (dist_fields[i].rxnfc_field & flags)
4307	key |= dist_fields[i].id;
4308
4309	return dpaa2_eth_set_dist_key(net_dev, type: DPAA2_ETH_RX_DIST_HASH, flags: key);
4310	}
4311
4312	int dpaa2_eth_set_cls(struct net_device *net_dev, u64 flags)
4313	{
4314	return dpaa2_eth_set_dist_key(net_dev, type: DPAA2_ETH_RX_DIST_CLS, flags);
4315	}
4316
4317	static int dpaa2_eth_set_default_cls(struct dpaa2_eth_priv *priv)
4318	{
4319	struct device *dev = priv->net_dev->dev.parent;
4320	int err;
4321
4322	/* Check if we actually support Rx flow classification */
4323	if (dpaa2_eth_has_legacy_dist(priv)) {
4324	dev_dbg(dev, "Rx cls not supported by current MC version\n");
4325	return -EOPNOTSUPP;
4326	}
4327
4328	if (!dpaa2_eth_fs_enabled(priv)) {
4329	dev_dbg(dev, "Rx cls disabled in DPNI options\n");
4330	return -EOPNOTSUPP;
4331	}
4332
4333	if (!dpaa2_eth_hash_enabled(priv)) {
4334	dev_dbg(dev, "Rx cls disabled for single queue DPNIs\n");
4335	return -EOPNOTSUPP;
4336	}
4337
4338	/* If there is no support for masking in the classification table,
4339	* we don't set a default key, as it will depend on the rules
4340	* added by the user at runtime.
4341	*/
4342	if (!dpaa2_eth_fs_mask_enabled(priv))
4343	goto out;
4344
4345	err = dpaa2_eth_set_cls(net_dev: priv->net_dev, DPAA2_ETH_DIST_ALL);
4346	if (err)
4347	return err;
4348
4349	out:
4350	priv->rx_cls_enabled = 1;
4351
4352	return 0;
4353	}
4354
4355	/* Bind the DPNI to its needed objects and resources: buffer pool, DPIOs,
4356	* frame queues and channels
4357	*/
4358	static int dpaa2_eth_bind_dpni(struct dpaa2_eth_priv *priv)
4359	{
4360	struct dpaa2_eth_bp *bp = priv->bp[DPAA2_ETH_DEFAULT_BP_IDX];
4361	struct net_device *net_dev = priv->net_dev;
4362	struct dpni_pools_cfg pools_params = { 0 };
4363	struct device *dev = net_dev->dev.parent;
4364	struct dpni_error_cfg err_cfg;
4365	int err = 0;
4366	int i;
4367
4368	pools_params.num_dpbp = 1;
4369	pools_params.pools[0].dpbp_id = bp->dev->obj_desc.id;
4370	pools_params.pools[0].backup_pool = 0;
4371	pools_params.pools[0].buffer_size = priv->rx_buf_size;
4372	err = dpni_set_pools(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, cfg: &pools_params);
4373	if (err) {
4374	dev_err(dev, "dpni_set_pools() failed\n");
4375	return err;
4376	}
4377
4378	/* have the interface implicitly distribute traffic based on
4379	* the default hash key
4380	*/
4381	err = dpaa2_eth_set_hash(net_dev, DPAA2_RXH_DEFAULT);
4382	if (err && err != -EOPNOTSUPP)
4383	dev_err(dev, "Failed to configure hashing\n");
4384
4385	/* Configure the flow classification key; it includes all
4386	* supported header fields and cannot be modified at runtime
4387	*/
4388	err = dpaa2_eth_set_default_cls(priv);
4389	if (err && err != -EOPNOTSUPP)
4390	dev_err(dev, "Failed to configure Rx classification key\n");
4391
4392	/* Configure handling of error frames */
4393	err_cfg.errors = DPAA2_FAS_RX_ERR_MASK;
4394	err_cfg.set_frame_annotation = 1;
4395	err_cfg.error_action = DPNI_ERROR_ACTION_DISCARD;
4396	err = dpni_set_errors_behavior(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
4397	cfg: &err_cfg);
4398	if (err) {
4399	dev_err(dev, "dpni_set_errors_behavior failed\n");
4400	return err;
4401	}
4402
4403	/* Configure Rx and Tx conf queues to generate CDANs */
4404	for (i = 0; i < priv->num_fqs; i++) {
4405	switch (priv->fq[i].type) {
4406	case DPAA2_RX_FQ:
4407	err = dpaa2_eth_setup_rx_flow(priv, fq: &priv->fq[i]);
4408	break;
4409	case DPAA2_TX_CONF_FQ:
4410	err = dpaa2_eth_setup_tx_flow(priv, fq: &priv->fq[i]);
4411	break;
4412	case DPAA2_RX_ERR_FQ:
4413	err = setup_rx_err_flow(priv, fq: &priv->fq[i]);
4414	break;
4415	default:
4416	dev_err(dev, "Invalid FQ type %d\n", priv->fq[i].type);
4417	return -EINVAL;
4418	}
4419	if (err)
4420	return err;
4421	}
4422
4423	err = dpni_get_qdid(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
4424	qtype: DPNI_QUEUE_TX, qdid: &priv->tx_qdid);
4425	if (err) {
4426	dev_err(dev, "dpni_get_qdid() failed\n");
4427	return err;
4428	}
4429
4430	return 0;
4431	}
4432
4433	/* Allocate rings for storing incoming frame descriptors */
4434	static int dpaa2_eth_alloc_rings(struct dpaa2_eth_priv *priv)
4435	{
4436	struct net_device *net_dev = priv->net_dev;
4437	struct device *dev = net_dev->dev.parent;
4438	int i;
4439
4440	for (i = 0; i < priv->num_channels; i++) {
4441	priv->channel[i]->store =
4442	dpaa2_io_store_create(DPAA2_ETH_STORE_SIZE, dev);
4443	if (!priv->channel[i]->store) {
4444	netdev_err(dev: net_dev, format: "dpaa2_io_store_create() failed\n");
4445	goto err_ring;
4446	}
4447	}
4448
4449	return 0;
4450
4451	err_ring:
4452	for (i = 0; i < priv->num_channels; i++) {
4453	if (!priv->channel[i]->store)
4454	break;
4455	dpaa2_io_store_destroy(s: priv->channel[i]->store);
4456	}
4457
4458	return -ENOMEM;
4459	}
4460
4461	static void dpaa2_eth_free_rings(struct dpaa2_eth_priv *priv)
4462	{
4463	int i;
4464
4465	for (i = 0; i < priv->num_channels; i++)
4466	dpaa2_io_store_destroy(s: priv->channel[i]->store);
4467	}
4468
4469	static int dpaa2_eth_set_mac_addr(struct dpaa2_eth_priv *priv)
4470	{
4471	struct net_device *net_dev = priv->net_dev;
4472	struct device *dev = net_dev->dev.parent;
4473	u8 mac_addr[ETH_ALEN], dpni_mac_addr[ETH_ALEN];
4474	int err;
4475
4476	/* Get firmware address, if any */
4477	err = dpni_get_port_mac_addr(mc_io: priv->mc_io, cm_flags: 0, token: priv->mc_token, mac_addr);
4478	if (err) {
4479	dev_err(dev, "dpni_get_port_mac_addr() failed\n");
4480	return err;
4481	}
4482
4483	/* Get DPNI attributes address, if any */
4484	err = dpni_get_primary_mac_addr(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
4485	mac_addr: dpni_mac_addr);
4486	if (err) {
4487	dev_err(dev, "dpni_get_primary_mac_addr() failed\n");
4488	return err;
4489	}
4490
4491	/* First check if firmware has any address configured by bootloader */
4492	if (!is_zero_ether_addr(addr: mac_addr)) {
4493	/* If the DPMAC addr != DPNI addr, update it */
4494	if (!ether_addr_equal(addr1: mac_addr, addr2: dpni_mac_addr)) {
4495	err = dpni_set_primary_mac_addr(mc_io: priv->mc_io, cmd_flags: 0,
4496	token: priv->mc_token,
4497	mac_addr);
4498	if (err) {
4499	dev_err(dev, "dpni_set_primary_mac_addr() failed\n");
4500	return err;
4501	}
4502	}
4503	eth_hw_addr_set(dev: net_dev, addr: mac_addr);
4504	} else if (is_zero_ether_addr(addr: dpni_mac_addr)) {
4505	/* No MAC address configured, fill in net_dev->dev_addr
4506	* with a random one
4507	*/
4508	eth_hw_addr_random(dev: net_dev);
4509	dev_dbg_once(dev, "device(s) have all-zero hwaddr, replaced with random\n");
4510
4511	err = dpni_set_primary_mac_addr(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
4512	mac_addr: net_dev->dev_addr);
4513	if (err) {
4514	dev_err(dev, "dpni_set_primary_mac_addr() failed\n");
4515	return err;
4516	}
4517
4518	/* Override NET_ADDR_RANDOM set by eth_hw_addr_random(); for all
4519	* practical purposes, this will be our "permanent" mac address,
4520	* at least until the next reboot. This move will also permit
4521	* register_netdevice() to properly fill up net_dev->perm_addr.
4522	*/
4523	net_dev->addr_assign_type = NET_ADDR_PERM;
4524	} else {
4525	/* NET_ADDR_PERM is default, all we have to do is
4526	* fill in the device addr.
4527	*/
4528	eth_hw_addr_set(dev: net_dev, addr: dpni_mac_addr);
4529	}
4530
4531	return 0;
4532	}
4533
4534	static int dpaa2_eth_netdev_init(struct net_device *net_dev)
4535	{
4536	struct device *dev = net_dev->dev.parent;
4537	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
4538	u32 options = priv->dpni_attrs.options;
4539	u64 supported = 0, not_supported = 0;
4540	u8 bcast_addr[ETH_ALEN];
4541	u8 num_queues;
4542	int err;
4543
4544	net_dev->netdev_ops = &dpaa2_eth_ops;
4545	net_dev->ethtool_ops = &dpaa2_ethtool_ops;
4546
4547	err = dpaa2_eth_set_mac_addr(priv);
4548	if (err)
4549	return err;
4550
4551	/* Explicitly add the broadcast address to the MAC filtering table */
4552	eth_broadcast_addr(addr: bcast_addr);
4553	err = dpni_add_mac_addr(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token, mac_addr: bcast_addr);
4554	if (err) {
4555	dev_err(dev, "dpni_add_mac_addr() failed\n");
4556	return err;
4557	}
4558
4559	/* Set MTU upper limit; lower limit is 68B (default value) */
4560	net_dev->max_mtu = DPAA2_ETH_MAX_MTU;
4561	err = dpni_set_max_frame_length(mc_io: priv->mc_io, cmd_flags: 0, token: priv->mc_token,
4562	DPAA2_ETH_MFL);
4563	if (err) {
4564	dev_err(dev, "dpni_set_max_frame_length() failed\n");
4565	return err;
4566	}
4567
4568	/* Set actual number of queues in the net device */
4569	num_queues = dpaa2_eth_queue_count(priv);
4570	err = netif_set_real_num_tx_queues(dev: net_dev, txq: num_queues);
4571	if (err) {
4572	dev_err(dev, "netif_set_real_num_tx_queues() failed\n");
4573	return err;
4574	}
4575	err = netif_set_real_num_rx_queues(dev: net_dev, rxq: num_queues);
4576	if (err) {
4577	dev_err(dev, "netif_set_real_num_rx_queues() failed\n");
4578	return err;
4579	}
4580
4581	dpaa2_eth_detect_features(priv);
4582
4583	/* Capabilities listing */
4584	supported |= IFF_LIVE_ADDR_CHANGE;
4585
4586	if (options & DPNI_OPT_NO_MAC_FILTER)
4587	not_supported |= IFF_UNICAST_FLT;
4588	else
4589	supported |= IFF_UNICAST_FLT;
4590
4591	net_dev->priv_flags |= supported;
4592	net_dev->priv_flags &= ~not_supported;
4593
4594	/* Features */
4595	net_dev->features = NETIF_F_RXCSUM |
4596	NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
4597	NETIF_F_SG | NETIF_F_HIGHDMA |
4598	NETIF_F_LLTX | NETIF_F_HW_TC | NETIF_F_TSO;
4599	net_dev->gso_max_segs = DPAA2_ETH_ENQUEUE_MAX_FDS;
4600	net_dev->hw_features = net_dev->features;
4601	net_dev->xdp_features = NETDEV_XDP_ACT_BASIC |
4602	NETDEV_XDP_ACT_REDIRECT |
4603	NETDEV_XDP_ACT_NDO_XMIT;
4604	if (priv->dpni_attrs.wriop_version >= DPAA2_WRIOP_VERSION(3, 0, 0) &&
4605	priv->dpni_attrs.num_queues <= 8)
4606	net_dev->xdp_features |= NETDEV_XDP_ACT_XSK_ZEROCOPY;
4607
4608	if (priv->dpni_attrs.vlan_filter_entries)
4609	net_dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
4610
4611	return 0;
4612	}
4613
4614	static int dpaa2_eth_poll_link_state(void *arg)
4615	{
4616	struct dpaa2_eth_priv *priv = (struct dpaa2_eth_priv *)arg;
4617	int err;
4618
4619	while (!kthread_should_stop()) {
4620	err = dpaa2_eth_link_state_update(priv);
4621	if (unlikely(err))
4622	return err;
4623
4624	msleep(DPAA2_ETH_LINK_STATE_REFRESH);
4625	}
4626
4627	return 0;
4628	}
4629
4630	static int dpaa2_eth_connect_mac(struct dpaa2_eth_priv *priv)
4631	{
4632	struct fsl_mc_device *dpni_dev, *dpmac_dev;
4633	struct dpaa2_mac *mac;
4634	int err;
4635
4636	dpni_dev = to_fsl_mc_device(priv->net_dev->dev.parent);
4637	dpmac_dev = fsl_mc_get_endpoint(mc_dev: dpni_dev, if_id: 0);
4638
4639	if (PTR_ERR(ptr: dpmac_dev) == -EPROBE_DEFER) {
4640	netdev_dbg(priv->net_dev, "waiting for mac\n");
4641	return PTR_ERR(ptr: dpmac_dev);
4642	}
4643
4644	if (IS_ERR(ptr: dpmac_dev) || dpmac_dev->dev.type != &fsl_mc_bus_dpmac_type)
4645	return 0;
4646
4647	mac = kzalloc(size: sizeof(struct dpaa2_mac), GFP_KERNEL);
4648	if (!mac)
4649	return -ENOMEM;
4650
4651	mac->mc_dev = dpmac_dev;
4652	mac->mc_io = priv->mc_io;
4653	mac->net_dev = priv->net_dev;
4654
4655	err = dpaa2_mac_open(mac);
4656	if (err)
4657	goto err_free_mac;
4658
4659	if (dpaa2_mac_is_type_phy(mac)) {
4660	err = dpaa2_mac_connect(mac);
4661	if (err) {
4662	if (err == -EPROBE_DEFER)
4663	netdev_dbg(priv->net_dev,
4664	"could not connect to MAC\n");
4665	else
4666	netdev_err(dev: priv->net_dev,
4667	format: "Error connecting to the MAC endpoint: %pe",
4668	ERR_PTR(error: err));
4669	goto err_close_mac;
4670	}
4671	}
4672
4673	mutex_lock(&priv->mac_lock);
4674	priv->mac = mac;
4675	mutex_unlock(lock: &priv->mac_lock);
4676
4677	return 0;
4678
4679	err_close_mac:
4680	dpaa2_mac_close(mac);
4681	err_free_mac:
4682	kfree(objp: mac);
4683	return err;
4684	}
4685
4686	static void dpaa2_eth_disconnect_mac(struct dpaa2_eth_priv *priv)
4687	{
4688	struct dpaa2_mac *mac;
4689
4690	mutex_lock(&priv->mac_lock);
4691	mac = priv->mac;
4692	priv->mac = NULL;
4693	mutex_unlock(lock: &priv->mac_lock);
4694
4695	if (!mac)
4696	return;
4697
4698	if (dpaa2_mac_is_type_phy(mac))
4699	dpaa2_mac_disconnect(mac);
4700
4701	dpaa2_mac_close(mac);
4702	kfree(objp: mac);
4703	}
4704
4705	static irqreturn_t dpni_irq0_handler_thread(int irq_num, void *arg)
4706	{
4707	u32 status = ~0;
4708	struct device *dev = (struct device *)arg;
4709	struct fsl_mc_device *dpni_dev = to_fsl_mc_device(dev);
4710	struct net_device *net_dev = dev_get_drvdata(dev);
4711	struct dpaa2_eth_priv *priv = netdev_priv(dev: net_dev);
4712	bool had_mac;
4713	int err;
4714
4715	err = dpni_get_irq_status(mc_io: dpni_dev->mc_io, cmd_flags: 0, token: dpni_dev->mc_handle,
4716	DPNI_IRQ_INDEX, status: &status);
4717	if (unlikely(err)) {
4718	netdev_err(dev: net_dev, format: "Can't get irq status (err %d)\n", err);
4719	return IRQ_HANDLED;
4720	}
4721
4722	if (status & DPNI_IRQ_EVENT_LINK_CHANGED)
4723	dpaa2_eth_link_state_update(priv: netdev_priv(dev: net_dev));
4724
4725	if (status & DPNI_IRQ_EVENT_ENDPOINT_CHANGED) {
4726	dpaa2_eth_set_mac_addr(priv: netdev_priv(dev: net_dev));
4727	dpaa2_eth_update_tx_fqids(priv);
4728
4729	/* We can avoid locking because the "endpoint changed" IRQ
4730	* handler is the only one who changes priv->mac at runtime,
4731	* so we are not racing with anyone.
4732	*/
4733	had_mac = !!priv->mac;
4734	if (had_mac)
4735	dpaa2_eth_disconnect_mac(priv);
4736	else
4737	dpaa2_eth_connect_mac(priv);
4738	}
4739
4740	return IRQ_HANDLED;
4741	}
4742
4743	static int dpaa2_eth_setup_irqs(struct fsl_mc_device *ls_dev)
4744	{
4745	int err = 0;
4746	struct fsl_mc_device_irq *irq;
4747
4748	err = fsl_mc_allocate_irqs(mc_dev: ls_dev);
4749	if (err) {
4750	dev_err(&ls_dev->dev, "MC irqs allocation failed\n");
4751	return err;
4752	}
4753
4754	irq = ls_dev->irqs[0];
4755	err = devm_request_threaded_irq(dev: &ls_dev->dev, irq: irq->virq,
4756	NULL, thread_fn: dpni_irq0_handler_thread,
4757	IRQF_NO_SUSPEND | IRQF_ONESHOT,
4758	devname: dev_name(dev: &ls_dev->dev), dev_id: &ls_dev->dev);
4759	if (err < 0) {
4760	dev_err(&ls_dev->dev, "devm_request_threaded_irq(): %d\n", err);
4761	goto free_mc_irq;
4762	}
4763
4764	err = dpni_set_irq_mask(mc_io: ls_dev->mc_io, cmd_flags: 0, token: ls_dev->mc_handle,
4765	DPNI_IRQ_INDEX, DPNI_IRQ_EVENT_LINK_CHANGED |
4766	DPNI_IRQ_EVENT_ENDPOINT_CHANGED);
4767	if (err < 0) {
4768	dev_err(&ls_dev->dev, "dpni_set_irq_mask(): %d\n", err);
4769	goto free_irq;
4770	}
4771
4772	err = dpni_set_irq_enable(mc_io: ls_dev->mc_io, cmd_flags: 0, token: ls_dev->mc_handle,
4773	DPNI_IRQ_INDEX, en: 1);
4774	if (err < 0) {
4775	dev_err(&ls_dev->dev, "dpni_set_irq_enable(): %d\n", err);
4776	goto free_irq;
4777	}
4778
4779	return 0;
4780
4781	free_irq:
4782	devm_free_irq(dev: &ls_dev->dev, irq: irq->virq, dev_id: &ls_dev->dev);
4783	free_mc_irq:
4784	fsl_mc_free_irqs(mc_dev: ls_dev);
4785
4786	return err;
4787	}
4788
4789	static void dpaa2_eth_add_ch_napi(struct dpaa2_eth_priv *priv)
4790	{
4791	int i;
4792	struct dpaa2_eth_channel *ch;
4793
4794	for (i = 0; i < priv->num_channels; i++) {
4795	ch = priv->channel[i];
4796	/* NAPI weight *MUST* be a multiple of DPAA2_ETH_STORE_SIZE */
4797	netif_napi_add(dev: priv->net_dev, napi: &ch->napi, poll: dpaa2_eth_poll);
4798	}
4799	}
4800
4801	static void dpaa2_eth_del_ch_napi(struct dpaa2_eth_priv *priv)
4802	{
4803	int i;
4804	struct dpaa2_eth_channel *ch;
4805
4806	for (i = 0; i < priv->num_channels; i++) {
4807	ch = priv->channel[i];
4808	netif_napi_del(napi: &ch->napi);
4809	}
4810	}
4811
4812	static int dpaa2_eth_probe(struct fsl_mc_device *dpni_dev)
4813	{
4814	struct device *dev;
4815	struct net_device *net_dev = NULL;
4816	struct dpaa2_eth_priv *priv = NULL;
4817	int err = 0;
4818
4819	dev = &dpni_dev->dev;
4820
4821	/* Net device */
4822	net_dev = alloc_etherdev_mq(sizeof(*priv), DPAA2_ETH_MAX_NETDEV_QUEUES);
4823	if (!net_dev) {
4824	dev_err(dev, "alloc_etherdev_mq() failed\n");
4825	return -ENOMEM;
4826	}
4827
4828	SET_NETDEV_DEV(net_dev, dev);
4829	dev_set_drvdata(dev, data: net_dev);
4830
4831	priv = netdev_priv(dev: net_dev);
4832	priv->net_dev = net_dev;
4833	SET_NETDEV_DEVLINK_PORT(net_dev, &priv->devlink_port);
4834
4835	mutex_init(&priv->mac_lock);
4836
4837	priv->iommu_domain = iommu_get_domain_for_dev(dev);
4838
4839	priv->tx_tstamp_type = HWTSTAMP_TX_OFF;
4840	priv->rx_tstamp = false;
4841
4842	priv->dpaa2_ptp_wq = alloc_workqueue(fmt: "dpaa2_ptp_wq", flags: 0, max_active: 0);
4843	if (!priv->dpaa2_ptp_wq) {
4844	err = -ENOMEM;
4845	goto err_wq_alloc;
4846	}
4847
4848	INIT_WORK(&priv->tx_onestep_tstamp, dpaa2_eth_tx_onestep_tstamp);
4849	mutex_init(&priv->onestep_tstamp_lock);
4850	skb_queue_head_init(list: &priv->tx_skbs);
4851
4852	priv->rx_copybreak = DPAA2_ETH_DEFAULT_COPYBREAK;
4853
4854	/* Obtain a MC portal */
4855	err = fsl_mc_portal_allocate(mc_dev: dpni_dev, FSL_MC_IO_ATOMIC_CONTEXT_PORTAL,
4856	new_mc_io: &priv->mc_io);
4857	if (err) {
4858	if (err == -ENXIO) {
4859	dev_dbg(dev, "waiting for MC portal\n");
4860	err = -EPROBE_DEFER;
4861	} else {
4862	dev_err(dev, "MC portal allocation failed\n");
4863	}
4864	goto err_portal_alloc;
4865	}
4866
4867	/* MC objects initialization and configuration */
4868	err = dpaa2_eth_setup_dpni(ls_dev: dpni_dev);
4869	if (err)
4870	goto err_dpni_setup;
4871
4872	err = dpaa2_eth_setup_dpio(priv);
4873	if (err)
4874	goto err_dpio_setup;
4875
4876	dpaa2_eth_setup_fqs(priv);
4877
4878	err = dpaa2_eth_setup_default_dpbp(priv);
4879	if (err)
4880	goto err_dpbp_setup;
4881
4882	err = dpaa2_eth_bind_dpni(priv);
4883	if (err)
4884	goto err_bind;
4885
4886	/* Add a NAPI context for each channel */
4887	dpaa2_eth_add_ch_napi(priv);
4888
4889	/* Percpu statistics */
4890	priv->percpu_stats = alloc_percpu(*priv->percpu_stats);
4891	if (!priv->percpu_stats) {
4892	dev_err(dev, "alloc_percpu(percpu_stats) failed\n");
4893	err = -ENOMEM;
4894	goto err_alloc_percpu_stats;
4895	}
4896	priv->percpu_extras = alloc_percpu(*priv->percpu_extras);
4897	if (!priv->percpu_extras) {
4898	dev_err(dev, "alloc_percpu(percpu_extras) failed\n");
4899	err = -ENOMEM;
4900	goto err_alloc_percpu_extras;
4901	}
4902
4903	priv->sgt_cache = alloc_percpu(*priv->sgt_cache);
4904	if (!priv->sgt_cache) {
4905	dev_err(dev, "alloc_percpu(sgt_cache) failed\n");
4906	err = -ENOMEM;
4907	goto err_alloc_sgt_cache;
4908	}
4909
4910	priv->fd = alloc_percpu(*priv->fd);
4911	if (!priv->fd) {
4912	dev_err(dev, "alloc_percpu(fds) failed\n");
4913	err = -ENOMEM;
4914	goto err_alloc_fds;
4915	}
4916
4917	err = dpaa2_eth_netdev_init(net_dev);
4918	if (err)
4919	goto err_netdev_init;
4920
4921	/* Configure checksum offload based on current interface flags */
4922	err = dpaa2_eth_set_rx_csum(priv, enable: !!(net_dev->features & NETIF_F_RXCSUM));
4923	if (err)
4924	goto err_csum;
4925
4926	err = dpaa2_eth_set_tx_csum(priv,
4927	enable: !!(net_dev->features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)));
4928	if (err)
4929	goto err_csum;
4930
4931	err = dpaa2_eth_alloc_rings(priv);
4932	if (err)
4933	goto err_alloc_rings;
4934
4935	#ifdef CONFIG_FSL_DPAA2_ETH_DCB
4936	if (dpaa2_eth_has_pause_support(priv) && priv->vlan_cls_enabled) {
4937	priv->dcbx_mode = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;
4938	net_dev->dcbnl_ops = &dpaa2_eth_dcbnl_ops;
4939	} else {
4940	dev_dbg(dev, "PFC not supported\n");
4941	}
4942	#endif
4943
4944	err = dpaa2_eth_connect_mac(priv);
4945	if (err)
4946	goto err_connect_mac;
4947
4948	err = dpaa2_eth_setup_irqs(ls_dev: dpni_dev);
4949	if (err) {
4950	netdev_warn(dev: net_dev, format: "Failed to set link interrupt, fall back to polling\n");
4951	priv->poll_thread = kthread_run(dpaa2_eth_poll_link_state, priv,
4952	"%s_poll_link", net_dev->name);
4953	if (IS_ERR(ptr: priv->poll_thread)) {
4954	dev_err(dev, "Error starting polling thread\n");
4955	goto err_poll_thread;
4956	}
4957	priv->do_link_poll = true;
4958	}
4959
4960	err = dpaa2_eth_dl_alloc(priv);
4961	if (err)
4962	goto err_dl_register;
4963
4964	err = dpaa2_eth_dl_traps_register(priv);
4965	if (err)
4966	goto err_dl_trap_register;
4967
4968	err = dpaa2_eth_dl_port_add(priv);
4969	if (err)
4970	goto err_dl_port_add;
4971
4972	net_dev->needed_headroom = DPAA2_ETH_SWA_SIZE + DPAA2_ETH_TX_BUF_ALIGN;
4973
4974	err = register_netdev(dev: net_dev);
4975	if (err < 0) {
4976	dev_err(dev, "register_netdev() failed\n");
4977	goto err_netdev_reg;
4978	}
4979
4980	#ifdef CONFIG_DEBUG_FS
4981	dpaa2_dbg_add(priv);
4982	#endif
4983
4984	dpaa2_eth_dl_register(priv);
4985	dev_info(dev, "Probed interface %s\n", net_dev->name);
4986	return 0;
4987
4988	err_netdev_reg:
4989	dpaa2_eth_dl_port_del(priv);
4990	err_dl_port_add:
4991	dpaa2_eth_dl_traps_unregister(priv);
4992	err_dl_trap_register:
4993	dpaa2_eth_dl_free(priv);
4994	err_dl_register:
4995	if (priv->do_link_poll)
4996	kthread_stop(k: priv->poll_thread);
4997	else
4998	fsl_mc_free_irqs(mc_dev: dpni_dev);
4999	err_poll_thread:
5000	dpaa2_eth_disconnect_mac(priv);
5001	err_connect_mac:
5002	dpaa2_eth_free_rings(priv);
5003	err_alloc_rings:
5004	err_csum:
5005	err_netdev_init:
5006	free_percpu(pdata: priv->fd);
5007	err_alloc_fds:
5008	free_percpu(pdata: priv->sgt_cache);
5009	err_alloc_sgt_cache:
5010	free_percpu(pdata: priv->percpu_extras);
5011	err_alloc_percpu_extras:
5012	free_percpu(pdata: priv->percpu_stats);
5013	err_alloc_percpu_stats:
5014	dpaa2_eth_del_ch_napi(priv);
5015	err_bind:
5016	dpaa2_eth_free_dpbps(priv);
5017	err_dpbp_setup:
5018	dpaa2_eth_free_dpio(priv);
5019	err_dpio_setup:
5020	dpaa2_eth_free_dpni(priv);
5021	err_dpni_setup:
5022	fsl_mc_portal_free(mc_io: priv->mc_io);
5023	err_portal_alloc:
5024	destroy_workqueue(wq: priv->dpaa2_ptp_wq);
5025	err_wq_alloc:
5026	dev_set_drvdata(dev, NULL);
5027	free_netdev(dev: net_dev);
5028
5029	return err;
5030	}
5031
5032	static void dpaa2_eth_remove(struct fsl_mc_device *ls_dev)
5033	{
5034	struct device *dev;
5035	struct net_device *net_dev;
5036	struct dpaa2_eth_priv *priv;
5037
5038	dev = &ls_dev->dev;
5039	net_dev = dev_get_drvdata(dev);
5040	priv = netdev_priv(dev: net_dev);
5041
5042	dpaa2_eth_dl_unregister(priv);
5043
5044	#ifdef CONFIG_DEBUG_FS
5045	dpaa2_dbg_remove(priv);
5046	#endif
5047
5048	unregister_netdev(dev: net_dev);
5049
5050	dpaa2_eth_dl_port_del(priv);
5051	dpaa2_eth_dl_traps_unregister(priv);
5052	dpaa2_eth_dl_free(priv);
5053
5054	if (priv->do_link_poll)
5055	kthread_stop(k: priv->poll_thread);
5056	else
5057	fsl_mc_free_irqs(mc_dev: ls_dev);
5058
5059	dpaa2_eth_disconnect_mac(priv);
5060	dpaa2_eth_free_rings(priv);
5061	free_percpu(pdata: priv->fd);
5062	free_percpu(pdata: priv->sgt_cache);
5063	free_percpu(pdata: priv->percpu_stats);
5064	free_percpu(pdata: priv->percpu_extras);
5065
5066	dpaa2_eth_del_ch_napi(priv);
5067	dpaa2_eth_free_dpbps(priv);
5068	dpaa2_eth_free_dpio(priv);
5069	dpaa2_eth_free_dpni(priv);
5070	if (priv->onestep_reg_base)
5071	iounmap(addr: priv->onestep_reg_base);
5072
5073	fsl_mc_portal_free(mc_io: priv->mc_io);
5074
5075	destroy_workqueue(wq: priv->dpaa2_ptp_wq);
5076
5077	dev_dbg(net_dev->dev.parent, "Removed interface %s\n", net_dev->name);
5078
5079	free_netdev(dev: net_dev);
5080	}
5081
5082	static const struct fsl_mc_device_id dpaa2_eth_match_id_table[] = {
5083	{
5084	.vendor = FSL_MC_VENDOR_FREESCALE,
5085	.obj_type = "dpni",
5086	},
5087	{ .vendor = 0x0 }
5088	};
5089	MODULE_DEVICE_TABLE(fslmc, dpaa2_eth_match_id_table);
5090
5091	static struct fsl_mc_driver dpaa2_eth_driver = {
5092	.driver = {
5093	.name = KBUILD_MODNAME,
5094	},
5095	.probe = dpaa2_eth_probe,
5096	.remove = dpaa2_eth_remove,
5097	.match_id_table = dpaa2_eth_match_id_table
5098	};
5099
5100	static int __init dpaa2_eth_driver_init(void)
5101	{
5102	int err;
5103
5104	dpaa2_eth_dbg_init();
5105	err = fsl_mc_driver_register(&dpaa2_eth_driver);
5106	if (err) {
5107	dpaa2_eth_dbg_exit();
5108	return err;
5109	}
5110
5111	return 0;
5112	}
5113
5114	static void __exit dpaa2_eth_driver_exit(void)
5115	{
5116	dpaa2_eth_dbg_exit();
5117	fsl_mc_driver_unregister(driver: &dpaa2_eth_driver);
5118	}
5119
5120	module_init(dpaa2_eth_driver_init);
5121	module_exit(dpaa2_eth_driver_exit);
5122