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14#include <linux/bitfield.h>
15#include <linux/bpf.h>
16#include <linux/bpf_trace.h>
17#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/fs.h>
21#include <linux/netdevice.h>
22#include <linux/etherdevice.h>
23#include <linux/interrupt.h>
24#include <linux/ip.h>
25#include <linux/ipv6.h>
26#include <linux/mm.h>
27#include <linux/overflow.h>
28#include <linux/page_ref.h>
29#include <linux/pci.h>
30#include <linux/pci_regs.h>
31#include <linux/msi.h>
32#include <linux/ethtool.h>
33#include <linux/log2.h>
34#include <linux/if_vlan.h>
35#include <linux/random.h>
36#include <linux/vmalloc.h>
37#include <linux/ktime.h>
38
39#include <net/tls.h>
40#include <net/vxlan.h>
41
42#include "nfpcore/nfp_nsp.h"
43#include "ccm.h"
44#include "nfp_app.h"
45#include "nfp_net_ctrl.h"
46#include "nfp_net.h"
47#include "nfp_net_sriov.h"
48#include "nfp_port.h"
49#include "crypto/crypto.h"
50#include "crypto/fw.h"
51
52
53
54
55
56
57void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver,
58 void __iomem *ctrl_bar)
59{
60 u32 reg;
61
62 reg = readl(ctrl_bar + NFP_NET_CFG_VERSION);
63 put_unaligned_le32(reg, fw_ver);
64}
65
66static dma_addr_t nfp_net_dma_map_rx(struct nfp_net_dp *dp, void *frag)
67{
68 return dma_map_single_attrs(dp->dev, frag + NFP_NET_RX_BUF_HEADROOM,
69 dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA,
70 dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC);
71}
72
73static void
74nfp_net_dma_sync_dev_rx(const struct nfp_net_dp *dp, dma_addr_t dma_addr)
75{
76 dma_sync_single_for_device(dp->dev, dma_addr,
77 dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA,
78 dp->rx_dma_dir);
79}
80
81static void nfp_net_dma_unmap_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr)
82{
83 dma_unmap_single_attrs(dp->dev, dma_addr,
84 dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA,
85 dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC);
86}
87
88static void nfp_net_dma_sync_cpu_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr,
89 unsigned int len)
90{
91 dma_sync_single_for_cpu(dp->dev, dma_addr - NFP_NET_RX_BUF_HEADROOM,
92 len, dp->rx_dma_dir);
93}
94
95
96
97
98
99
100
101static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update)
102{
103 nn_writel(nn, NFP_NET_CFG_UPDATE, update);
104
105 nn_pci_flush(nn);
106 nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1);
107 nn->reconfig_in_progress_update = update;
108}
109
110
111static void nfp_net_reconfig_start_async(struct nfp_net *nn, u32 update)
112{
113 update |= nn->reconfig_posted;
114 nn->reconfig_posted = 0;
115
116 nfp_net_reconfig_start(nn, update);
117
118 nn->reconfig_timer_active = true;
119 mod_timer(&nn->reconfig_timer, jiffies + NFP_NET_POLL_TIMEOUT * HZ);
120}
121
122static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check)
123{
124 u32 reg;
125
126 reg = nn_readl(nn, NFP_NET_CFG_UPDATE);
127 if (reg == 0)
128 return true;
129 if (reg & NFP_NET_CFG_UPDATE_ERR) {
130 nn_err(nn, "Reconfig error (status: 0x%08x update: 0x%08x ctrl: 0x%08x)\n",
131 reg, nn->reconfig_in_progress_update,
132 nn_readl(nn, NFP_NET_CFG_CTRL));
133 return true;
134 } else if (last_check) {
135 nn_err(nn, "Reconfig timeout (status: 0x%08x update: 0x%08x ctrl: 0x%08x)\n",
136 reg, nn->reconfig_in_progress_update,
137 nn_readl(nn, NFP_NET_CFG_CTRL));
138 return true;
139 }
140
141 return false;
142}
143
144static bool __nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline)
145{
146 bool timed_out = false;
147 int i;
148
149
150
151
152 for (i = 0; i < 50; i++) {
153 if (nfp_net_reconfig_check_done(nn, false))
154 return false;
155 udelay(4);
156 }
157
158 while (!nfp_net_reconfig_check_done(nn, timed_out)) {
159 usleep_range(250, 500);
160 timed_out = time_is_before_eq_jiffies(deadline);
161 }
162
163 return timed_out;
164}
165
166static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline)
167{
168 if (__nfp_net_reconfig_wait(nn, deadline))
169 return -EIO;
170
171 if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR)
172 return -EIO;
173
174 return 0;
175}
176
177static void nfp_net_reconfig_timer(struct timer_list *t)
178{
179 struct nfp_net *nn = from_timer(nn, t, reconfig_timer);
180
181 spin_lock_bh(&nn->reconfig_lock);
182
183 nn->reconfig_timer_active = false;
184
185
186 if (nn->reconfig_sync_present)
187 goto done;
188
189
190 nfp_net_reconfig_check_done(nn, true);
191
192 if (nn->reconfig_posted)
193 nfp_net_reconfig_start_async(nn, 0);
194done:
195 spin_unlock_bh(&nn->reconfig_lock);
196}
197
198
199
200
201
202
203
204
205
206
207static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update)
208{
209 spin_lock_bh(&nn->reconfig_lock);
210
211
212 if (nn->reconfig_sync_present) {
213 nn->reconfig_posted |= update;
214 goto done;
215 }
216
217
218 if (!nn->reconfig_timer_active ||
219 nfp_net_reconfig_check_done(nn, false))
220 nfp_net_reconfig_start_async(nn, update);
221 else
222 nn->reconfig_posted |= update;
223done:
224 spin_unlock_bh(&nn->reconfig_lock);
225}
226
227static void nfp_net_reconfig_sync_enter(struct nfp_net *nn)
228{
229 bool cancelled_timer = false;
230 u32 pre_posted_requests;
231
232 spin_lock_bh(&nn->reconfig_lock);
233
234 WARN_ON(nn->reconfig_sync_present);
235 nn->reconfig_sync_present = true;
236
237 if (nn->reconfig_timer_active) {
238 nn->reconfig_timer_active = false;
239 cancelled_timer = true;
240 }
241 pre_posted_requests = nn->reconfig_posted;
242 nn->reconfig_posted = 0;
243
244 spin_unlock_bh(&nn->reconfig_lock);
245
246 if (cancelled_timer) {
247 del_timer_sync(&nn->reconfig_timer);
248 nfp_net_reconfig_wait(nn, nn->reconfig_timer.expires);
249 }
250
251
252 if (pre_posted_requests) {
253 nfp_net_reconfig_start(nn, pre_posted_requests);
254 nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT);
255 }
256}
257
258static void nfp_net_reconfig_wait_posted(struct nfp_net *nn)
259{
260 nfp_net_reconfig_sync_enter(nn);
261
262 spin_lock_bh(&nn->reconfig_lock);
263 nn->reconfig_sync_present = false;
264 spin_unlock_bh(&nn->reconfig_lock);
265}
266
267
268
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270
271
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274
275
276
277
278int __nfp_net_reconfig(struct nfp_net *nn, u32 update)
279{
280 int ret;
281
282 nfp_net_reconfig_sync_enter(nn);
283
284 nfp_net_reconfig_start(nn, update);
285 ret = nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT);
286
287 spin_lock_bh(&nn->reconfig_lock);
288
289 if (nn->reconfig_posted)
290 nfp_net_reconfig_start_async(nn, 0);
291
292 nn->reconfig_sync_present = false;
293
294 spin_unlock_bh(&nn->reconfig_lock);
295
296 return ret;
297}
298
299int nfp_net_reconfig(struct nfp_net *nn, u32 update)
300{
301 int ret;
302
303 nn_ctrl_bar_lock(nn);
304 ret = __nfp_net_reconfig(nn, update);
305 nn_ctrl_bar_unlock(nn);
306
307 return ret;
308}
309
310int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size)
311{
312 if (nn->tlv_caps.mbox_len < NFP_NET_CFG_MBOX_SIMPLE_VAL + data_size) {
313 nn_err(nn, "mailbox too small for %u of data (%u)\n",
314 data_size, nn->tlv_caps.mbox_len);
315 return -EIO;
316 }
317
318 nn_ctrl_bar_lock(nn);
319 return 0;
320}
321
322
323
324
325
326
327
328
329
330
331int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd)
332{
333 u32 mbox = nn->tlv_caps.mbox_off;
334 int ret;
335
336 nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd);
337
338 ret = __nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MBOX);
339 if (ret) {
340 nn_err(nn, "Mailbox update error\n");
341 return ret;
342 }
343
344 return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET);
345}
346
347void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 mbox_cmd)
348{
349 u32 mbox = nn->tlv_caps.mbox_off;
350
351 nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd);
352
353 nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_MBOX);
354}
355
356int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn)
357{
358 u32 mbox = nn->tlv_caps.mbox_off;
359
360 nfp_net_reconfig_wait_posted(nn);
361
362 return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET);
363}
364
365int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd)
366{
367 int ret;
368
369 ret = nfp_net_mbox_reconfig(nn, mbox_cmd);
370 nn_ctrl_bar_unlock(nn);
371 return ret;
372}
373
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381
382
383
384static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr)
385{
386 nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED);
387 nn_pci_flush(nn);
388}
389
390
391
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396
397
398
399unsigned int
400nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries,
401 unsigned int min_irqs, unsigned int wanted_irqs)
402{
403 unsigned int i;
404 int got_irqs;
405
406 for (i = 0; i < wanted_irqs; i++)
407 irq_entries[i].entry = i;
408
409 got_irqs = pci_enable_msix_range(pdev, irq_entries,
410 min_irqs, wanted_irqs);
411 if (got_irqs < 0) {
412 dev_err(&pdev->dev, "Failed to enable %d-%d MSI-X (err=%d)\n",
413 min_irqs, wanted_irqs, got_irqs);
414 return 0;
415 }
416
417 if (got_irqs < wanted_irqs)
418 dev_warn(&pdev->dev, "Unable to allocate %d IRQs got only %d\n",
419 wanted_irqs, got_irqs);
420
421 return got_irqs;
422}
423
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425
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430
431
432
433void
434nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries,
435 unsigned int n)
436{
437 struct nfp_net_dp *dp = &nn->dp;
438
439 nn->max_r_vecs = n - NFP_NET_NON_Q_VECTORS;
440 dp->num_r_vecs = nn->max_r_vecs;
441
442 memcpy(nn->irq_entries, irq_entries, sizeof(*irq_entries) * n);
443
444 if (dp->num_rx_rings > dp->num_r_vecs ||
445 dp->num_tx_rings > dp->num_r_vecs)
446 dev_warn(nn->dp.dev, "More rings (%d,%d) than vectors (%d).\n",
447 dp->num_rx_rings, dp->num_tx_rings,
448 dp->num_r_vecs);
449
450 dp->num_rx_rings = min(dp->num_r_vecs, dp->num_rx_rings);
451 dp->num_tx_rings = min(dp->num_r_vecs, dp->num_tx_rings);
452 dp->num_stack_tx_rings = dp->num_tx_rings;
453}
454
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458
459
460
461void nfp_net_irqs_disable(struct pci_dev *pdev)
462{
463 pci_disable_msix(pdev);
464}
465
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467
468
469
470
471
472
473static irqreturn_t nfp_net_irq_rxtx(int irq, void *data)
474{
475 struct nfp_net_r_vector *r_vec = data;
476
477
478
479
480
481 r_vec->event_ctr++;
482
483 napi_schedule_irqoff(&r_vec->napi);
484
485
486
487
488
489 return IRQ_HANDLED;
490}
491
492static irqreturn_t nfp_ctrl_irq_rxtx(int irq, void *data)
493{
494 struct nfp_net_r_vector *r_vec = data;
495
496 tasklet_schedule(&r_vec->tasklet);
497
498 return IRQ_HANDLED;
499}
500
501
502
503
504
505static void nfp_net_read_link_status(struct nfp_net *nn)
506{
507 unsigned long flags;
508 bool link_up;
509 u32 sts;
510
511 spin_lock_irqsave(&nn->link_status_lock, flags);
512
513 sts = nn_readl(nn, NFP_NET_CFG_STS);
514 link_up = !!(sts & NFP_NET_CFG_STS_LINK);
515
516 if (nn->link_up == link_up)
517 goto out;
518
519 nn->link_up = link_up;
520 if (nn->port)
521 set_bit(NFP_PORT_CHANGED, &nn->port->flags);
522
523 if (nn->link_up) {
524 netif_carrier_on(nn->dp.netdev);
525 netdev_info(nn->dp.netdev, "NIC Link is Up\n");
526 } else {
527 netif_carrier_off(nn->dp.netdev);
528 netdev_info(nn->dp.netdev, "NIC Link is Down\n");
529 }
530out:
531 spin_unlock_irqrestore(&nn->link_status_lock, flags);
532}
533
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540
541static irqreturn_t nfp_net_irq_lsc(int irq, void *data)
542{
543 struct nfp_net *nn = data;
544 struct msix_entry *entry;
545
546 entry = &nn->irq_entries[NFP_NET_IRQ_LSC_IDX];
547
548 nfp_net_read_link_status(nn);
549
550 nfp_net_irq_unmask(nn, entry->entry);
551
552 return IRQ_HANDLED;
553}
554
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557
558
559
560
561
562static irqreturn_t nfp_net_irq_exn(int irq, void *data)
563{
564 struct nfp_net *nn = data;
565
566 nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__);
567
568 return IRQ_HANDLED;
569}
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576
577
578static void
579nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring,
580 struct nfp_net_r_vector *r_vec, unsigned int idx,
581 bool is_xdp)
582{
583 struct nfp_net *nn = r_vec->nfp_net;
584
585 tx_ring->idx = idx;
586 tx_ring->r_vec = r_vec;
587 tx_ring->is_xdp = is_xdp;
588 u64_stats_init(&tx_ring->r_vec->tx_sync);
589
590 tx_ring->qcidx = tx_ring->idx * nn->stride_tx;
591 tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx);
592}
593
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595
596
597
598
599
600static void
601nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring,
602 struct nfp_net_r_vector *r_vec, unsigned int idx)
603{
604 struct nfp_net *nn = r_vec->nfp_net;
605
606 rx_ring->idx = idx;
607 rx_ring->r_vec = r_vec;
608 u64_stats_init(&rx_ring->r_vec->rx_sync);
609
610 rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx;
611 rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx);
612}
613
614
615
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619
620
621
622
623
624static int
625nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset,
626 const char *format, char *name, size_t name_sz,
627 unsigned int vector_idx, irq_handler_t handler)
628{
629 struct msix_entry *entry;
630 int err;
631
632 entry = &nn->irq_entries[vector_idx];
633
634 snprintf(name, name_sz, format, nfp_net_name(nn));
635 err = request_irq(entry->vector, handler, 0, name, nn);
636 if (err) {
637 nn_err(nn, "Failed to request IRQ %d (err=%d).\n",
638 entry->vector, err);
639 return err;
640 }
641 nn_writeb(nn, ctrl_offset, entry->entry);
642 nfp_net_irq_unmask(nn, entry->entry);
643
644 return 0;
645}
646
647
648
649
650
651
652
653static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset,
654 unsigned int vector_idx)
655{
656 nn_writeb(nn, ctrl_offset, 0xff);
657 nn_pci_flush(nn);
658 free_irq(nn->irq_entries[vector_idx].vector, nn);
659}
660
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685static int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt)
686{
687 return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt);
688}
689
690
691static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring)
692{
693 return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4);
694}
695
696static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring)
697{
698 return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1);
699}
700
701
702
703
704
705
706
707
708
709
710static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q,
711 struct nfp_net_tx_ring *tx_ring)
712{
713 netif_tx_stop_queue(nd_q);
714
715
716 smp_mb();
717 if (unlikely(nfp_net_tx_ring_should_wake(tx_ring)))
718 netif_tx_start_queue(nd_q);
719}
720
721
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730
731
732static void nfp_net_tx_tso(struct nfp_net_r_vector *r_vec,
733 struct nfp_net_tx_buf *txbuf,
734 struct nfp_net_tx_desc *txd, struct sk_buff *skb,
735 u32 md_bytes)
736{
737 u32 l3_offset, l4_offset, hdrlen;
738 u16 mss;
739
740 if (!skb_is_gso(skb))
741 return;
742
743 if (!skb->encapsulation) {
744 l3_offset = skb_network_offset(skb);
745 l4_offset = skb_transport_offset(skb);
746 hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
747 } else {
748 l3_offset = skb_inner_network_offset(skb);
749 l4_offset = skb_inner_transport_offset(skb);
750 hdrlen = skb_inner_transport_header(skb) - skb->data +
751 inner_tcp_hdrlen(skb);
752 }
753
754 txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs;
755 txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1);
756
757 mss = skb_shinfo(skb)->gso_size & PCIE_DESC_TX_MSS_MASK;
758 txd->l3_offset = l3_offset - md_bytes;
759 txd->l4_offset = l4_offset - md_bytes;
760 txd->lso_hdrlen = hdrlen - md_bytes;
761 txd->mss = cpu_to_le16(mss);
762 txd->flags |= PCIE_DESC_TX_LSO;
763
764 u64_stats_update_begin(&r_vec->tx_sync);
765 r_vec->tx_lso++;
766 u64_stats_update_end(&r_vec->tx_sync);
767}
768
769
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777
778
779
780static void nfp_net_tx_csum(struct nfp_net_dp *dp,
781 struct nfp_net_r_vector *r_vec,
782 struct nfp_net_tx_buf *txbuf,
783 struct nfp_net_tx_desc *txd, struct sk_buff *skb)
784{
785 struct ipv6hdr *ipv6h;
786 struct iphdr *iph;
787 u8 l4_hdr;
788
789 if (!(dp->ctrl & NFP_NET_CFG_CTRL_TXCSUM))
790 return;
791
792 if (skb->ip_summed != CHECKSUM_PARTIAL)
793 return;
794
795 txd->flags |= PCIE_DESC_TX_CSUM;
796 if (skb->encapsulation)
797 txd->flags |= PCIE_DESC_TX_ENCAP;
798
799 iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb);
800 ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb);
801
802 if (iph->version == 4) {
803 txd->flags |= PCIE_DESC_TX_IP4_CSUM;
804 l4_hdr = iph->protocol;
805 } else if (ipv6h->version == 6) {
806 l4_hdr = ipv6h->nexthdr;
807 } else {
808 nn_dp_warn(dp, "partial checksum but ipv=%x!\n", iph->version);
809 return;
810 }
811
812 switch (l4_hdr) {
813 case IPPROTO_TCP:
814 txd->flags |= PCIE_DESC_TX_TCP_CSUM;
815 break;
816 case IPPROTO_UDP:
817 txd->flags |= PCIE_DESC_TX_UDP_CSUM;
818 break;
819 default:
820 nn_dp_warn(dp, "partial checksum but l4 proto=%x!\n", l4_hdr);
821 return;
822 }
823
824 u64_stats_update_begin(&r_vec->tx_sync);
825 if (skb->encapsulation)
826 r_vec->hw_csum_tx_inner += txbuf->pkt_cnt;
827 else
828 r_vec->hw_csum_tx += txbuf->pkt_cnt;
829 u64_stats_update_end(&r_vec->tx_sync);
830}
831
832static struct sk_buff *
833nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,
834 struct sk_buff *skb, u64 *tls_handle, int *nr_frags)
835{
836#ifdef CONFIG_TLS_DEVICE
837 struct nfp_net_tls_offload_ctx *ntls;
838 struct sk_buff *nskb;
839 bool resync_pending;
840 u32 datalen, seq;
841
842 if (likely(!dp->ktls_tx))
843 return skb;
844 if (!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk))
845 return skb;
846
847 datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb));
848 seq = ntohl(tcp_hdr(skb)->seq);
849 ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX);
850 resync_pending = tls_offload_tx_resync_pending(skb->sk);
851 if (unlikely(resync_pending || ntls->next_seq != seq)) {
852
853 if (!datalen)
854 return skb;
855
856 u64_stats_update_begin(&r_vec->tx_sync);
857 r_vec->tls_tx_fallback++;
858 u64_stats_update_end(&r_vec->tx_sync);
859
860 nskb = tls_encrypt_skb(skb);
861 if (!nskb) {
862 u64_stats_update_begin(&r_vec->tx_sync);
863 r_vec->tls_tx_no_fallback++;
864 u64_stats_update_end(&r_vec->tx_sync);
865 return NULL;
866 }
867
868 if (nskb == skb)
869 return skb;
870
871 if (unlikely(skb_is_nonlinear(nskb))) {
872 nn_dp_warn(dp, "tls_encrypt_skb() produced fragmented frame\n");
873 u64_stats_update_begin(&r_vec->tx_sync);
874 r_vec->tx_errors++;
875 u64_stats_update_end(&r_vec->tx_sync);
876 dev_kfree_skb_any(nskb);
877 return NULL;
878 }
879
880
881 if (!resync_pending && seq - ntls->next_seq < U32_MAX / 4)
882 tls_offload_tx_resync_request(nskb->sk, seq,
883 ntls->next_seq);
884
885 *nr_frags = 0;
886 return nskb;
887 }
888
889 if (datalen) {
890 u64_stats_update_begin(&r_vec->tx_sync);
891 if (!skb_is_gso(skb))
892 r_vec->hw_tls_tx++;
893 else
894 r_vec->hw_tls_tx += skb_shinfo(skb)->gso_segs;
895 u64_stats_update_end(&r_vec->tx_sync);
896 }
897
898 memcpy(tls_handle, ntls->fw_handle, sizeof(ntls->fw_handle));
899 ntls->next_seq += datalen;
900#endif
901 return skb;
902}
903
904static void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle)
905{
906#ifdef CONFIG_TLS_DEVICE
907 struct nfp_net_tls_offload_ctx *ntls;
908 u32 datalen, seq;
909
910 if (!tls_handle)
911 return;
912 if (WARN_ON_ONCE(!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk)))
913 return;
914
915 datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb));
916 seq = ntohl(tcp_hdr(skb)->seq);
917
918 ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX);
919 if (ntls->next_seq == seq + datalen)
920 ntls->next_seq = seq;
921 else
922 WARN_ON_ONCE(1);
923#endif
924}
925
926static void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring *tx_ring)
927{
928 wmb();
929 nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add);
930 tx_ring->wr_ptr_add = 0;
931}
932
933static int nfp_net_prep_tx_meta(struct sk_buff *skb, u64 tls_handle)
934{
935 struct metadata_dst *md_dst = skb_metadata_dst(skb);
936 unsigned char *data;
937 u32 meta_id = 0;
938 int md_bytes;
939
940 if (likely(!md_dst && !tls_handle))
941 return 0;
942 if (unlikely(md_dst && md_dst->type != METADATA_HW_PORT_MUX)) {
943 if (!tls_handle)
944 return 0;
945 md_dst = NULL;
946 }
947
948 md_bytes = 4 + !!md_dst * 4 + !!tls_handle * 8;
949
950 if (unlikely(skb_cow_head(skb, md_bytes)))
951 return -ENOMEM;
952
953 meta_id = 0;
954 data = skb_push(skb, md_bytes) + md_bytes;
955 if (md_dst) {
956 data -= 4;
957 put_unaligned_be32(md_dst->u.port_info.port_id, data);
958 meta_id = NFP_NET_META_PORTID;
959 }
960 if (tls_handle) {
961
962
963
964 data -= 8;
965 memcpy(data, &tls_handle, sizeof(tls_handle));
966 meta_id <<= NFP_NET_META_FIELD_SIZE;
967 meta_id |= NFP_NET_META_CONN_HANDLE;
968 }
969
970 data -= 4;
971 put_unaligned_be32(meta_id, data);
972
973 return md_bytes;
974}
975
976
977
978
979
980
981
982
983static netdev_tx_t nfp_net_tx(struct sk_buff *skb, struct net_device *netdev)
984{
985 struct nfp_net *nn = netdev_priv(netdev);
986 const skb_frag_t *frag;
987 int f, nr_frags, wr_idx, md_bytes;
988 struct nfp_net_tx_ring *tx_ring;
989 struct nfp_net_r_vector *r_vec;
990 struct nfp_net_tx_buf *txbuf;
991 struct nfp_net_tx_desc *txd;
992 struct netdev_queue *nd_q;
993 struct nfp_net_dp *dp;
994 dma_addr_t dma_addr;
995 unsigned int fsize;
996 u64 tls_handle = 0;
997 u16 qidx;
998
999 dp = &nn->dp;
1000 qidx = skb_get_queue_mapping(skb);
1001 tx_ring = &dp->tx_rings[qidx];
1002 r_vec = tx_ring->r_vec;
1003
1004 nr_frags = skb_shinfo(skb)->nr_frags;
1005
1006 if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) {
1007 nn_dp_warn(dp, "TX ring %d busy. wrp=%u rdp=%u\n",
1008 qidx, tx_ring->wr_p, tx_ring->rd_p);
1009 nd_q = netdev_get_tx_queue(dp->netdev, qidx);
1010 netif_tx_stop_queue(nd_q);
1011 nfp_net_tx_xmit_more_flush(tx_ring);
1012 u64_stats_update_begin(&r_vec->tx_sync);
1013 r_vec->tx_busy++;
1014 u64_stats_update_end(&r_vec->tx_sync);
1015 return NETDEV_TX_BUSY;
1016 }
1017
1018 skb = nfp_net_tls_tx(dp, r_vec, skb, &tls_handle, &nr_frags);
1019 if (unlikely(!skb)) {
1020 nfp_net_tx_xmit_more_flush(tx_ring);
1021 return NETDEV_TX_OK;
1022 }
1023
1024 md_bytes = nfp_net_prep_tx_meta(skb, tls_handle);
1025 if (unlikely(md_bytes < 0))
1026 goto err_flush;
1027
1028
1029 dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb),
1030 DMA_TO_DEVICE);
1031 if (dma_mapping_error(dp->dev, dma_addr))
1032 goto err_dma_err;
1033
1034 wr_idx = D_IDX(tx_ring, tx_ring->wr_p);
1035
1036
1037 txbuf = &tx_ring->txbufs[wr_idx];
1038 txbuf->skb = skb;
1039 txbuf->dma_addr = dma_addr;
1040 txbuf->fidx = -1;
1041 txbuf->pkt_cnt = 1;
1042 txbuf->real_len = skb->len;
1043
1044
1045 txd = &tx_ring->txds[wr_idx];
1046 txd->offset_eop = (nr_frags ? 0 : PCIE_DESC_TX_EOP) | md_bytes;
1047 txd->dma_len = cpu_to_le16(skb_headlen(skb));
1048 nfp_desc_set_dma_addr(txd, dma_addr);
1049 txd->data_len = cpu_to_le16(skb->len);
1050
1051 txd->flags = 0;
1052 txd->mss = 0;
1053 txd->lso_hdrlen = 0;
1054
1055
1056 nfp_net_tx_tso(r_vec, txbuf, txd, skb, md_bytes);
1057 nfp_net_tx_csum(dp, r_vec, txbuf, txd, skb);
1058 if (skb_vlan_tag_present(skb) && dp->ctrl & NFP_NET_CFG_CTRL_TXVLAN) {
1059 txd->flags |= PCIE_DESC_TX_VLAN;
1060 txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb));
1061 }
1062
1063
1064 if (nr_frags > 0) {
1065 __le64 second_half;
1066
1067
1068 second_half = txd->vals8[1];
1069
1070 for (f = 0; f < nr_frags; f++) {
1071 frag = &skb_shinfo(skb)->frags[f];
1072 fsize = skb_frag_size(frag);
1073
1074 dma_addr = skb_frag_dma_map(dp->dev, frag, 0,
1075 fsize, DMA_TO_DEVICE);
1076 if (dma_mapping_error(dp->dev, dma_addr))
1077 goto err_unmap;
1078
1079 wr_idx = D_IDX(tx_ring, wr_idx + 1);
1080 tx_ring->txbufs[wr_idx].skb = skb;
1081 tx_ring->txbufs[wr_idx].dma_addr = dma_addr;
1082 tx_ring->txbufs[wr_idx].fidx = f;
1083
1084 txd = &tx_ring->txds[wr_idx];
1085 txd->dma_len = cpu_to_le16(fsize);
1086 nfp_desc_set_dma_addr(txd, dma_addr);
1087 txd->offset_eop = md_bytes |
1088 ((f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0);
1089 txd->vals8[1] = second_half;
1090 }
1091
1092 u64_stats_update_begin(&r_vec->tx_sync);
1093 r_vec->tx_gather++;
1094 u64_stats_update_end(&r_vec->tx_sync);
1095 }
1096
1097 skb_tx_timestamp(skb);
1098
1099 nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx);
1100
1101 tx_ring->wr_p += nr_frags + 1;
1102 if (nfp_net_tx_ring_should_stop(tx_ring))
1103 nfp_net_tx_ring_stop(nd_q, tx_ring);
1104
1105 tx_ring->wr_ptr_add += nr_frags + 1;
1106 if (__netdev_tx_sent_queue(nd_q, txbuf->real_len, netdev_xmit_more()))
1107 nfp_net_tx_xmit_more_flush(tx_ring);
1108
1109 return NETDEV_TX_OK;
1110
1111err_unmap:
1112 while (--f >= 0) {
1113 frag = &skb_shinfo(skb)->frags[f];
1114 dma_unmap_page(dp->dev, tx_ring->txbufs[wr_idx].dma_addr,
1115 skb_frag_size(frag), DMA_TO_DEVICE);
1116 tx_ring->txbufs[wr_idx].skb = NULL;
1117 tx_ring->txbufs[wr_idx].dma_addr = 0;
1118 tx_ring->txbufs[wr_idx].fidx = -2;
1119 wr_idx = wr_idx - 1;
1120 if (wr_idx < 0)
1121 wr_idx += tx_ring->cnt;
1122 }
1123 dma_unmap_single(dp->dev, tx_ring->txbufs[wr_idx].dma_addr,
1124 skb_headlen(skb), DMA_TO_DEVICE);
1125 tx_ring->txbufs[wr_idx].skb = NULL;
1126 tx_ring->txbufs[wr_idx].dma_addr = 0;
1127 tx_ring->txbufs[wr_idx].fidx = -2;
1128err_dma_err:
1129 nn_dp_warn(dp, "Failed to map DMA TX buffer\n");
1130err_flush:
1131 nfp_net_tx_xmit_more_flush(tx_ring);
1132 u64_stats_update_begin(&r_vec->tx_sync);
1133 r_vec->tx_errors++;
1134 u64_stats_update_end(&r_vec->tx_sync);
1135 nfp_net_tls_tx_undo(skb, tls_handle);
1136 dev_kfree_skb_any(skb);
1137 return NETDEV_TX_OK;
1138}
1139
1140
1141
1142
1143
1144
1145static void nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring, int budget)
1146{
1147 struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
1148 struct nfp_net_dp *dp = &r_vec->nfp_net->dp;
1149 struct netdev_queue *nd_q;
1150 u32 done_pkts = 0, done_bytes = 0;
1151 u32 qcp_rd_p;
1152 int todo;
1153
1154 if (tx_ring->wr_p == tx_ring->rd_p)
1155 return;
1156
1157
1158 qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q);
1159
1160 if (qcp_rd_p == tx_ring->qcp_rd_p)
1161 return;
1162
1163 todo = D_IDX(tx_ring, qcp_rd_p - tx_ring->qcp_rd_p);
1164
1165 while (todo--) {
1166 const skb_frag_t *frag;
1167 struct nfp_net_tx_buf *tx_buf;
1168 struct sk_buff *skb;
1169 int fidx, nr_frags;
1170 int idx;
1171
1172 idx = D_IDX(tx_ring, tx_ring->rd_p++);
1173 tx_buf = &tx_ring->txbufs[idx];
1174
1175 skb = tx_buf->skb;
1176 if (!skb)
1177 continue;
1178
1179 nr_frags = skb_shinfo(skb)->nr_frags;
1180 fidx = tx_buf->fidx;
1181
1182 if (fidx == -1) {
1183
1184 dma_unmap_single(dp->dev, tx_buf->dma_addr,
1185 skb_headlen(skb), DMA_TO_DEVICE);
1186
1187 done_pkts += tx_buf->pkt_cnt;
1188 done_bytes += tx_buf->real_len;
1189 } else {
1190
1191 frag = &skb_shinfo(skb)->frags[fidx];
1192 dma_unmap_page(dp->dev, tx_buf->dma_addr,
1193 skb_frag_size(frag), DMA_TO_DEVICE);
1194 }
1195
1196
1197 if (fidx == nr_frags - 1)
1198 napi_consume_skb(skb, budget);
1199
1200 tx_buf->dma_addr = 0;
1201 tx_buf->skb = NULL;
1202 tx_buf->fidx = -2;
1203 }
1204
1205 tx_ring->qcp_rd_p = qcp_rd_p;
1206
1207 u64_stats_update_begin(&r_vec->tx_sync);
1208 r_vec->tx_bytes += done_bytes;
1209 r_vec->tx_pkts += done_pkts;
1210 u64_stats_update_end(&r_vec->tx_sync);
1211
1212 if (!dp->netdev)
1213 return;
1214
1215 nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx);
1216 netdev_tx_completed_queue(nd_q, done_pkts, done_bytes);
1217 if (nfp_net_tx_ring_should_wake(tx_ring)) {
1218
1219 smp_mb();
1220
1221 if (unlikely(netif_tx_queue_stopped(nd_q)))
1222 netif_tx_wake_queue(nd_q);
1223 }
1224
1225 WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt,
1226 "TX ring corruption rd_p=%u wr_p=%u cnt=%u\n",
1227 tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt);
1228}
1229
1230static bool nfp_net_xdp_complete(struct nfp_net_tx_ring *tx_ring)
1231{
1232 struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
1233 u32 done_pkts = 0, done_bytes = 0;
1234 bool done_all;
1235 int idx, todo;
1236 u32 qcp_rd_p;
1237
1238
1239 qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q);
1240
1241 if (qcp_rd_p == tx_ring->qcp_rd_p)
1242 return true;
1243
1244 todo = D_IDX(tx_ring, qcp_rd_p - tx_ring->qcp_rd_p);
1245
1246 done_all = todo <= NFP_NET_XDP_MAX_COMPLETE;
1247 todo = min(todo, NFP_NET_XDP_MAX_COMPLETE);
1248
1249 tx_ring->qcp_rd_p = D_IDX(tx_ring, tx_ring->qcp_rd_p + todo);
1250
1251 done_pkts = todo;
1252 while (todo--) {
1253 idx = D_IDX(tx_ring, tx_ring->rd_p);
1254 tx_ring->rd_p++;
1255
1256 done_bytes += tx_ring->txbufs[idx].real_len;
1257 }
1258
1259 u64_stats_update_begin(&r_vec->tx_sync);
1260 r_vec->tx_bytes += done_bytes;
1261 r_vec->tx_pkts += done_pkts;
1262 u64_stats_update_end(&r_vec->tx_sync);
1263
1264 WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt,
1265 "XDP TX ring corruption rd_p=%u wr_p=%u cnt=%u\n",
1266 tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt);
1267
1268 return done_all;
1269}
1270
1271
1272
1273
1274
1275
1276
1277
1278static void
1279nfp_net_tx_ring_reset(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring)
1280{
1281 const skb_frag_t *frag;
1282 struct netdev_queue *nd_q;
1283
1284 while (!tx_ring->is_xdp && tx_ring->rd_p != tx_ring->wr_p) {
1285 struct nfp_net_tx_buf *tx_buf;
1286 struct sk_buff *skb;
1287 int idx, nr_frags;
1288
1289 idx = D_IDX(tx_ring, tx_ring->rd_p);
1290 tx_buf = &tx_ring->txbufs[idx];
1291
1292 skb = tx_ring->txbufs[idx].skb;
1293 nr_frags = skb_shinfo(skb)->nr_frags;
1294
1295 if (tx_buf->fidx == -1) {
1296
1297 dma_unmap_single(dp->dev, tx_buf->dma_addr,
1298 skb_headlen(skb), DMA_TO_DEVICE);
1299 } else {
1300
1301 frag = &skb_shinfo(skb)->frags[tx_buf->fidx];
1302 dma_unmap_page(dp->dev, tx_buf->dma_addr,
1303 skb_frag_size(frag), DMA_TO_DEVICE);
1304 }
1305
1306
1307 if (tx_buf->fidx == nr_frags - 1)
1308 dev_kfree_skb_any(skb);
1309
1310 tx_buf->dma_addr = 0;
1311 tx_buf->skb = NULL;
1312 tx_buf->fidx = -2;
1313
1314 tx_ring->qcp_rd_p++;
1315 tx_ring->rd_p++;
1316 }
1317
1318 memset(tx_ring->txds, 0, tx_ring->size);
1319 tx_ring->wr_p = 0;
1320 tx_ring->rd_p = 0;
1321 tx_ring->qcp_rd_p = 0;
1322 tx_ring->wr_ptr_add = 0;
1323
1324 if (tx_ring->is_xdp || !dp->netdev)
1325 return;
1326
1327 nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx);
1328 netdev_tx_reset_queue(nd_q);
1329}
1330
1331static void nfp_net_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1332{
1333 struct nfp_net *nn = netdev_priv(netdev);
1334
1335 nn_warn(nn, "TX watchdog timeout on ring: %u\n", txqueue);
1336}
1337
1338
1339
1340static unsigned int
1341nfp_net_calc_fl_bufsz(struct nfp_net_dp *dp)
1342{
1343 unsigned int fl_bufsz;
1344
1345 fl_bufsz = NFP_NET_RX_BUF_HEADROOM;
1346 fl_bufsz += dp->rx_dma_off;
1347 if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC)
1348 fl_bufsz += NFP_NET_MAX_PREPEND;
1349 else
1350 fl_bufsz += dp->rx_offset;
1351 fl_bufsz += ETH_HLEN + VLAN_HLEN * 2 + dp->mtu;
1352
1353 fl_bufsz = SKB_DATA_ALIGN(fl_bufsz);
1354 fl_bufsz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
1355
1356 return fl_bufsz;
1357}
1358
1359static void
1360nfp_net_free_frag(void *frag, bool xdp)
1361{
1362 if (!xdp)
1363 skb_free_frag(frag);
1364 else
1365 __free_page(virt_to_page(frag));
1366}
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377static void *nfp_net_rx_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr)
1378{
1379 void *frag;
1380
1381 if (!dp->xdp_prog) {
1382 frag = netdev_alloc_frag(dp->fl_bufsz);
1383 } else {
1384 struct page *page;
1385
1386 page = alloc_page(GFP_KERNEL);
1387 frag = page ? page_address(page) : NULL;
1388 }
1389 if (!frag) {
1390 nn_dp_warn(dp, "Failed to alloc receive page frag\n");
1391 return NULL;
1392 }
1393
1394 *dma_addr = nfp_net_dma_map_rx(dp, frag);
1395 if (dma_mapping_error(dp->dev, *dma_addr)) {
1396 nfp_net_free_frag(frag, dp->xdp_prog);
1397 nn_dp_warn(dp, "Failed to map DMA RX buffer\n");
1398 return NULL;
1399 }
1400
1401 return frag;
1402}
1403
1404static void *nfp_net_napi_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr)
1405{
1406 void *frag;
1407
1408 if (!dp->xdp_prog) {
1409 frag = napi_alloc_frag(dp->fl_bufsz);
1410 if (unlikely(!frag))
1411 return NULL;
1412 } else {
1413 struct page *page;
1414
1415 page = dev_alloc_page();
1416 if (unlikely(!page))
1417 return NULL;
1418 frag = page_address(page);
1419 }
1420
1421 *dma_addr = nfp_net_dma_map_rx(dp, frag);
1422 if (dma_mapping_error(dp->dev, *dma_addr)) {
1423 nfp_net_free_frag(frag, dp->xdp_prog);
1424 nn_dp_warn(dp, "Failed to map DMA RX buffer\n");
1425 return NULL;
1426 }
1427
1428 return frag;
1429}
1430
1431
1432
1433
1434
1435
1436
1437
1438static void nfp_net_rx_give_one(const struct nfp_net_dp *dp,
1439 struct nfp_net_rx_ring *rx_ring,
1440 void *frag, dma_addr_t dma_addr)
1441{
1442 unsigned int wr_idx;
1443
1444 wr_idx = D_IDX(rx_ring, rx_ring->wr_p);
1445
1446 nfp_net_dma_sync_dev_rx(dp, dma_addr);
1447
1448
1449 rx_ring->rxbufs[wr_idx].frag = frag;
1450 rx_ring->rxbufs[wr_idx].dma_addr = dma_addr;
1451
1452
1453 rx_ring->rxds[wr_idx].fld.reserved = 0;
1454 rx_ring->rxds[wr_idx].fld.meta_len_dd = 0;
1455 nfp_desc_set_dma_addr(&rx_ring->rxds[wr_idx].fld,
1456 dma_addr + dp->rx_dma_off);
1457
1458 rx_ring->wr_p++;
1459 if (!(rx_ring->wr_p % NFP_NET_FL_BATCH)) {
1460
1461
1462
1463 wmb();
1464 nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, NFP_NET_FL_BATCH);
1465 }
1466}
1467
1468
1469
1470
1471
1472
1473
1474static void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring)
1475{
1476 unsigned int wr_idx, last_idx;
1477
1478
1479
1480
1481 if (rx_ring->wr_p == 0 && rx_ring->rd_p == 0)
1482 return;
1483
1484
1485 wr_idx = D_IDX(rx_ring, rx_ring->wr_p);
1486 last_idx = rx_ring->cnt - 1;
1487 rx_ring->rxbufs[wr_idx].dma_addr = rx_ring->rxbufs[last_idx].dma_addr;
1488 rx_ring->rxbufs[wr_idx].frag = rx_ring->rxbufs[last_idx].frag;
1489 rx_ring->rxbufs[last_idx].dma_addr = 0;
1490 rx_ring->rxbufs[last_idx].frag = NULL;
1491
1492 memset(rx_ring->rxds, 0, rx_ring->size);
1493 rx_ring->wr_p = 0;
1494 rx_ring->rd_p = 0;
1495}
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506static void
1507nfp_net_rx_ring_bufs_free(struct nfp_net_dp *dp,
1508 struct nfp_net_rx_ring *rx_ring)
1509{
1510 unsigned int i;
1511
1512 for (i = 0; i < rx_ring->cnt - 1; i++) {
1513
1514
1515
1516
1517 if (!rx_ring->rxbufs[i].frag)
1518 continue;
1519
1520 nfp_net_dma_unmap_rx(dp, rx_ring->rxbufs[i].dma_addr);
1521 nfp_net_free_frag(rx_ring->rxbufs[i].frag, dp->xdp_prog);
1522 rx_ring->rxbufs[i].dma_addr = 0;
1523 rx_ring->rxbufs[i].frag = NULL;
1524 }
1525}
1526
1527
1528
1529
1530
1531
1532static int
1533nfp_net_rx_ring_bufs_alloc(struct nfp_net_dp *dp,
1534 struct nfp_net_rx_ring *rx_ring)
1535{
1536 struct nfp_net_rx_buf *rxbufs;
1537 unsigned int i;
1538
1539 rxbufs = rx_ring->rxbufs;
1540
1541 for (i = 0; i < rx_ring->cnt - 1; i++) {
1542 rxbufs[i].frag = nfp_net_rx_alloc_one(dp, &rxbufs[i].dma_addr);
1543 if (!rxbufs[i].frag) {
1544 nfp_net_rx_ring_bufs_free(dp, rx_ring);
1545 return -ENOMEM;
1546 }
1547 }
1548
1549 return 0;
1550}
1551
1552
1553
1554
1555
1556
1557static void
1558nfp_net_rx_ring_fill_freelist(struct nfp_net_dp *dp,
1559 struct nfp_net_rx_ring *rx_ring)
1560{
1561 unsigned int i;
1562
1563 for (i = 0; i < rx_ring->cnt - 1; i++)
1564 nfp_net_rx_give_one(dp, rx_ring, rx_ring->rxbufs[i].frag,
1565 rx_ring->rxbufs[i].dma_addr);
1566}
1567
1568
1569
1570
1571
1572static int nfp_net_rx_csum_has_errors(u16 flags)
1573{
1574 u16 csum_all_checked, csum_all_ok;
1575
1576 csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL;
1577 csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK;
1578
1579 return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT);
1580}
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590static void nfp_net_rx_csum(struct nfp_net_dp *dp,
1591 struct nfp_net_r_vector *r_vec,
1592 struct nfp_net_rx_desc *rxd,
1593 struct nfp_meta_parsed *meta, struct sk_buff *skb)
1594{
1595 skb_checksum_none_assert(skb);
1596
1597 if (!(dp->netdev->features & NETIF_F_RXCSUM))
1598 return;
1599
1600 if (meta->csum_type) {
1601 skb->ip_summed = meta->csum_type;
1602 skb->csum = meta->csum;
1603 u64_stats_update_begin(&r_vec->rx_sync);
1604 r_vec->hw_csum_rx_complete++;
1605 u64_stats_update_end(&r_vec->rx_sync);
1606 return;
1607 }
1608
1609 if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) {
1610 u64_stats_update_begin(&r_vec->rx_sync);
1611 r_vec->hw_csum_rx_error++;
1612 u64_stats_update_end(&r_vec->rx_sync);
1613 return;
1614 }
1615
1616
1617
1618
1619
1620 if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK ||
1621 rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) {
1622 __skb_incr_checksum_unnecessary(skb);
1623 u64_stats_update_begin(&r_vec->rx_sync);
1624 r_vec->hw_csum_rx_ok++;
1625 u64_stats_update_end(&r_vec->rx_sync);
1626 }
1627
1628 if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK ||
1629 rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) {
1630 __skb_incr_checksum_unnecessary(skb);
1631 u64_stats_update_begin(&r_vec->rx_sync);
1632 r_vec->hw_csum_rx_inner_ok++;
1633 u64_stats_update_end(&r_vec->rx_sync);
1634 }
1635}
1636
1637static void
1638nfp_net_set_hash(struct net_device *netdev, struct nfp_meta_parsed *meta,
1639 unsigned int type, __be32 *hash)
1640{
1641 if (!(netdev->features & NETIF_F_RXHASH))
1642 return;
1643
1644 switch (type) {
1645 case NFP_NET_RSS_IPV4:
1646 case NFP_NET_RSS_IPV6:
1647 case NFP_NET_RSS_IPV6_EX:
1648 meta->hash_type = PKT_HASH_TYPE_L3;
1649 break;
1650 default:
1651 meta->hash_type = PKT_HASH_TYPE_L4;
1652 break;
1653 }
1654
1655 meta->hash = get_unaligned_be32(hash);
1656}
1657
1658static void
1659nfp_net_set_hash_desc(struct net_device *netdev, struct nfp_meta_parsed *meta,
1660 void *data, struct nfp_net_rx_desc *rxd)
1661{
1662 struct nfp_net_rx_hash *rx_hash = data;
1663
1664 if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS))
1665 return;
1666
1667 nfp_net_set_hash(netdev, meta, get_unaligned_be32(&rx_hash->hash_type),
1668 &rx_hash->hash);
1669}
1670
1671static bool
1672nfp_net_parse_meta(struct net_device *netdev, struct nfp_meta_parsed *meta,
1673 void *data, void *pkt, unsigned int pkt_len, int meta_len)
1674{
1675 u32 meta_info;
1676
1677 meta_info = get_unaligned_be32(data);
1678 data += 4;
1679
1680 while (meta_info) {
1681 switch (meta_info & NFP_NET_META_FIELD_MASK) {
1682 case NFP_NET_META_HASH:
1683 meta_info >>= NFP_NET_META_FIELD_SIZE;
1684 nfp_net_set_hash(netdev, meta,
1685 meta_info & NFP_NET_META_FIELD_MASK,
1686 (__be32 *)data);
1687 data += 4;
1688 break;
1689 case NFP_NET_META_MARK:
1690 meta->mark = get_unaligned_be32(data);
1691 data += 4;
1692 break;
1693 case NFP_NET_META_PORTID:
1694 meta->portid = get_unaligned_be32(data);
1695 data += 4;
1696 break;
1697 case NFP_NET_META_CSUM:
1698 meta->csum_type = CHECKSUM_COMPLETE;
1699 meta->csum =
1700 (__force __wsum)__get_unaligned_cpu32(data);
1701 data += 4;
1702 break;
1703 case NFP_NET_META_RESYNC_INFO:
1704 if (nfp_net_tls_rx_resync_req(netdev, data, pkt,
1705 pkt_len))
1706 return false;
1707 data += sizeof(struct nfp_net_tls_resync_req);
1708 break;
1709 default:
1710 return true;
1711 }
1712
1713 meta_info >>= NFP_NET_META_FIELD_SIZE;
1714 }
1715
1716 return data != pkt;
1717}
1718
1719static void
1720nfp_net_rx_drop(const struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,
1721 struct nfp_net_rx_ring *rx_ring, struct nfp_net_rx_buf *rxbuf,
1722 struct sk_buff *skb)
1723{
1724 u64_stats_update_begin(&r_vec->rx_sync);
1725 r_vec->rx_drops++;
1726
1727
1728
1729 if (skb && rxbuf)
1730 r_vec->rx_replace_buf_alloc_fail++;
1731 u64_stats_update_end(&r_vec->rx_sync);
1732
1733
1734
1735
1736 if (skb && rxbuf && skb->head == rxbuf->frag)
1737 page_ref_inc(virt_to_head_page(rxbuf->frag));
1738 if (rxbuf)
1739 nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, rxbuf->dma_addr);
1740 if (skb)
1741 dev_kfree_skb_any(skb);
1742}
1743
1744static bool
1745nfp_net_tx_xdp_buf(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring,
1746 struct nfp_net_tx_ring *tx_ring,
1747 struct nfp_net_rx_buf *rxbuf, unsigned int dma_off,
1748 unsigned int pkt_len, bool *completed)
1749{
1750 unsigned int dma_map_sz = dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA;
1751 struct nfp_net_tx_buf *txbuf;
1752 struct nfp_net_tx_desc *txd;
1753 int wr_idx;
1754
1755
1756 if (pkt_len + dma_off > dma_map_sz)
1757 return false;
1758
1759 if (unlikely(nfp_net_tx_full(tx_ring, 1))) {
1760 if (!*completed) {
1761 nfp_net_xdp_complete(tx_ring);
1762 *completed = true;
1763 }
1764
1765 if (unlikely(nfp_net_tx_full(tx_ring, 1))) {
1766 nfp_net_rx_drop(dp, rx_ring->r_vec, rx_ring, rxbuf,
1767 NULL);
1768 return false;
1769 }
1770 }
1771
1772 wr_idx = D_IDX(tx_ring, tx_ring->wr_p);
1773
1774
1775 txbuf = &tx_ring->txbufs[wr_idx];
1776
1777 nfp_net_rx_give_one(dp, rx_ring, txbuf->frag, txbuf->dma_addr);
1778
1779 txbuf->frag = rxbuf->frag;
1780 txbuf->dma_addr = rxbuf->dma_addr;
1781 txbuf->fidx = -1;
1782 txbuf->pkt_cnt = 1;
1783 txbuf->real_len = pkt_len;
1784
1785 dma_sync_single_for_device(dp->dev, rxbuf->dma_addr + dma_off,
1786 pkt_len, DMA_BIDIRECTIONAL);
1787
1788
1789 txd = &tx_ring->txds[wr_idx];
1790 txd->offset_eop = PCIE_DESC_TX_EOP;
1791 txd->dma_len = cpu_to_le16(pkt_len);
1792 nfp_desc_set_dma_addr(txd, rxbuf->dma_addr + dma_off);
1793 txd->data_len = cpu_to_le16(pkt_len);
1794
1795 txd->flags = 0;
1796 txd->mss = 0;
1797 txd->lso_hdrlen = 0;
1798
1799 tx_ring->wr_p++;
1800 tx_ring->wr_ptr_add++;
1801 return true;
1802}
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
1816{
1817 struct nfp_net_r_vector *r_vec = rx_ring->r_vec;
1818 struct nfp_net_dp *dp = &r_vec->nfp_net->dp;
1819 struct nfp_net_tx_ring *tx_ring;
1820 struct bpf_prog *xdp_prog;
1821 bool xdp_tx_cmpl = false;
1822 unsigned int true_bufsz;
1823 struct sk_buff *skb;
1824 int pkts_polled = 0;
1825 struct xdp_buff xdp;
1826 int idx;
1827
1828 xdp_prog = READ_ONCE(dp->xdp_prog);
1829 true_bufsz = xdp_prog ? PAGE_SIZE : dp->fl_bufsz;
1830 xdp_init_buff(&xdp, PAGE_SIZE - NFP_NET_RX_BUF_HEADROOM,
1831 &rx_ring->xdp_rxq);
1832 tx_ring = r_vec->xdp_ring;
1833
1834 while (pkts_polled < budget) {
1835 unsigned int meta_len, data_len, meta_off, pkt_len, pkt_off;
1836 struct nfp_net_rx_buf *rxbuf;
1837 struct nfp_net_rx_desc *rxd;
1838 struct nfp_meta_parsed meta;
1839 bool redir_egress = false;
1840 struct net_device *netdev;
1841 dma_addr_t new_dma_addr;
1842 u32 meta_len_xdp = 0;
1843 void *new_frag;
1844
1845 idx = D_IDX(rx_ring, rx_ring->rd_p);
1846
1847 rxd = &rx_ring->rxds[idx];
1848 if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD))
1849 break;
1850
1851
1852
1853
1854 dma_rmb();
1855
1856 memset(&meta, 0, sizeof(meta));
1857
1858 rx_ring->rd_p++;
1859 pkts_polled++;
1860
1861 rxbuf = &rx_ring->rxbufs[idx];
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874 meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK;
1875 data_len = le16_to_cpu(rxd->rxd.data_len);
1876 pkt_len = data_len - meta_len;
1877
1878 pkt_off = NFP_NET_RX_BUF_HEADROOM + dp->rx_dma_off;
1879 if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC)
1880 pkt_off += meta_len;
1881 else
1882 pkt_off += dp->rx_offset;
1883 meta_off = pkt_off - meta_len;
1884
1885
1886 u64_stats_update_begin(&r_vec->rx_sync);
1887 r_vec->rx_pkts++;
1888 r_vec->rx_bytes += pkt_len;
1889 u64_stats_update_end(&r_vec->rx_sync);
1890
1891 if (unlikely(meta_len > NFP_NET_MAX_PREPEND ||
1892 (dp->rx_offset && meta_len > dp->rx_offset))) {
1893 nn_dp_warn(dp, "oversized RX packet metadata %u\n",
1894 meta_len);
1895 nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL);
1896 continue;
1897 }
1898
1899 nfp_net_dma_sync_cpu_rx(dp, rxbuf->dma_addr + meta_off,
1900 data_len);
1901
1902 if (!dp->chained_metadata_format) {
1903 nfp_net_set_hash_desc(dp->netdev, &meta,
1904 rxbuf->frag + meta_off, rxd);
1905 } else if (meta_len) {
1906 if (unlikely(nfp_net_parse_meta(dp->netdev, &meta,
1907 rxbuf->frag + meta_off,
1908 rxbuf->frag + pkt_off,
1909 pkt_len, meta_len))) {
1910 nn_dp_warn(dp, "invalid RX packet metadata\n");
1911 nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf,
1912 NULL);
1913 continue;
1914 }
1915 }
1916
1917 if (xdp_prog && !meta.portid) {
1918 void *orig_data = rxbuf->frag + pkt_off;
1919 unsigned int dma_off;
1920 int act;
1921
1922 xdp_prepare_buff(&xdp,
1923 rxbuf->frag + NFP_NET_RX_BUF_HEADROOM,
1924 pkt_off - NFP_NET_RX_BUF_HEADROOM,
1925 pkt_len, true);
1926
1927 act = bpf_prog_run_xdp(xdp_prog, &xdp);
1928
1929 pkt_len = xdp.data_end - xdp.data;
1930 pkt_off += xdp.data - orig_data;
1931
1932 switch (act) {
1933 case XDP_PASS:
1934 meta_len_xdp = xdp.data - xdp.data_meta;
1935 break;
1936 case XDP_TX:
1937 dma_off = pkt_off - NFP_NET_RX_BUF_HEADROOM;
1938 if (unlikely(!nfp_net_tx_xdp_buf(dp, rx_ring,
1939 tx_ring, rxbuf,
1940 dma_off,
1941 pkt_len,
1942 &xdp_tx_cmpl)))
1943 trace_xdp_exception(dp->netdev,
1944 xdp_prog, act);
1945 continue;
1946 default:
1947 bpf_warn_invalid_xdp_action(act);
1948 fallthrough;
1949 case XDP_ABORTED:
1950 trace_xdp_exception(dp->netdev, xdp_prog, act);
1951 fallthrough;
1952 case XDP_DROP:
1953 nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag,
1954 rxbuf->dma_addr);
1955 continue;
1956 }
1957 }
1958
1959 if (likely(!meta.portid)) {
1960 netdev = dp->netdev;
1961 } else if (meta.portid == NFP_META_PORT_ID_CTRL) {
1962 struct nfp_net *nn = netdev_priv(dp->netdev);
1963
1964 nfp_app_ctrl_rx_raw(nn->app, rxbuf->frag + pkt_off,
1965 pkt_len);
1966 nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag,
1967 rxbuf->dma_addr);
1968 continue;
1969 } else {
1970 struct nfp_net *nn;
1971
1972 nn = netdev_priv(dp->netdev);
1973 netdev = nfp_app_dev_get(nn->app, meta.portid,
1974 &redir_egress);
1975 if (unlikely(!netdev)) {
1976 nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf,
1977 NULL);
1978 continue;
1979 }
1980
1981 if (nfp_netdev_is_nfp_repr(netdev))
1982 nfp_repr_inc_rx_stats(netdev, pkt_len);
1983 }
1984
1985 skb = build_skb(rxbuf->frag, true_bufsz);
1986 if (unlikely(!skb)) {
1987 nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL);
1988 continue;
1989 }
1990 new_frag = nfp_net_napi_alloc_one(dp, &new_dma_addr);
1991 if (unlikely(!new_frag)) {
1992 nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb);
1993 continue;
1994 }
1995
1996 nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr);
1997
1998 nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr);
1999
2000 skb_reserve(skb, pkt_off);
2001 skb_put(skb, pkt_len);
2002
2003 skb->mark = meta.mark;
2004 skb_set_hash(skb, meta.hash, meta.hash_type);
2005
2006 skb_record_rx_queue(skb, rx_ring->idx);
2007 skb->protocol = eth_type_trans(skb, netdev);
2008
2009 nfp_net_rx_csum(dp, r_vec, rxd, &meta, skb);
2010
2011#ifdef CONFIG_TLS_DEVICE
2012 if (rxd->rxd.flags & PCIE_DESC_RX_DECRYPTED) {
2013 skb->decrypted = true;
2014 u64_stats_update_begin(&r_vec->rx_sync);
2015 r_vec->hw_tls_rx++;
2016 u64_stats_update_end(&r_vec->rx_sync);
2017 }
2018#endif
2019
2020 if (rxd->rxd.flags & PCIE_DESC_RX_VLAN)
2021 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2022 le16_to_cpu(rxd->rxd.vlan));
2023 if (meta_len_xdp)
2024 skb_metadata_set(skb, meta_len_xdp);
2025
2026 if (likely(!redir_egress)) {
2027 napi_gro_receive(&rx_ring->r_vec->napi, skb);
2028 } else {
2029 skb->dev = netdev;
2030 skb_reset_network_header(skb);
2031 __skb_push(skb, ETH_HLEN);
2032 dev_queue_xmit(skb);
2033 }
2034 }
2035
2036 if (xdp_prog) {
2037 if (tx_ring->wr_ptr_add)
2038 nfp_net_tx_xmit_more_flush(tx_ring);
2039 else if (unlikely(tx_ring->wr_p != tx_ring->rd_p) &&
2040 !xdp_tx_cmpl)
2041 if (!nfp_net_xdp_complete(tx_ring))
2042 pkts_polled = budget;
2043 }
2044
2045 return pkts_polled;
2046}
2047
2048
2049
2050
2051
2052
2053
2054
2055static int nfp_net_poll(struct napi_struct *napi, int budget)
2056{
2057 struct nfp_net_r_vector *r_vec =
2058 container_of(napi, struct nfp_net_r_vector, napi);
2059 unsigned int pkts_polled = 0;
2060
2061 if (r_vec->tx_ring)
2062 nfp_net_tx_complete(r_vec->tx_ring, budget);
2063 if (r_vec->rx_ring)
2064 pkts_polled = nfp_net_rx(r_vec->rx_ring, budget);
2065
2066 if (pkts_polled < budget)
2067 if (napi_complete_done(napi, pkts_polled))
2068 nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_entry);
2069
2070 if (r_vec->nfp_net->rx_coalesce_adapt_on) {
2071 struct dim_sample dim_sample = {};
2072 unsigned int start;
2073 u64 pkts, bytes;
2074
2075 do {
2076 start = u64_stats_fetch_begin(&r_vec->rx_sync);
2077 pkts = r_vec->rx_pkts;
2078 bytes = r_vec->rx_bytes;
2079 } while (u64_stats_fetch_retry(&r_vec->rx_sync, start));
2080
2081 dim_update_sample(r_vec->event_ctr, pkts, bytes, &dim_sample);
2082 net_dim(&r_vec->rx_dim, dim_sample);
2083 }
2084
2085 if (r_vec->nfp_net->tx_coalesce_adapt_on) {
2086 struct dim_sample dim_sample = {};
2087 unsigned int start;
2088 u64 pkts, bytes;
2089
2090 do {
2091 start = u64_stats_fetch_begin(&r_vec->tx_sync);
2092 pkts = r_vec->tx_pkts;
2093 bytes = r_vec->tx_bytes;
2094 } while (u64_stats_fetch_retry(&r_vec->tx_sync, start));
2095
2096 dim_update_sample(r_vec->event_ctr, pkts, bytes, &dim_sample);
2097 net_dim(&r_vec->tx_dim, dim_sample);
2098 }
2099
2100 return pkts_polled;
2101}
2102
2103
2104
2105
2106static bool
2107nfp_ctrl_tx_one(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
2108 struct sk_buff *skb, bool old)
2109{
2110 unsigned int real_len = skb->len, meta_len = 0;
2111 struct nfp_net_tx_ring *tx_ring;
2112 struct nfp_net_tx_buf *txbuf;
2113 struct nfp_net_tx_desc *txd;
2114 struct nfp_net_dp *dp;
2115 dma_addr_t dma_addr;
2116 int wr_idx;
2117
2118 dp = &r_vec->nfp_net->dp;
2119 tx_ring = r_vec->tx_ring;
2120
2121 if (WARN_ON_ONCE(skb_shinfo(skb)->nr_frags)) {
2122 nn_dp_warn(dp, "Driver's CTRL TX does not implement gather\n");
2123 goto err_free;
2124 }
2125
2126 if (unlikely(nfp_net_tx_full(tx_ring, 1))) {
2127 u64_stats_update_begin(&r_vec->tx_sync);
2128 r_vec->tx_busy++;
2129 u64_stats_update_end(&r_vec->tx_sync);
2130 if (!old)
2131 __skb_queue_tail(&r_vec->queue, skb);
2132 else
2133 __skb_queue_head(&r_vec->queue, skb);
2134 return true;
2135 }
2136
2137 if (nfp_app_ctrl_has_meta(nn->app)) {
2138 if (unlikely(skb_headroom(skb) < 8)) {
2139 nn_dp_warn(dp, "CTRL TX on skb without headroom\n");
2140 goto err_free;
2141 }
2142 meta_len = 8;
2143 put_unaligned_be32(NFP_META_PORT_ID_CTRL, skb_push(skb, 4));
2144 put_unaligned_be32(NFP_NET_META_PORTID, skb_push(skb, 4));
2145 }
2146
2147
2148 dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb),
2149 DMA_TO_DEVICE);
2150 if (dma_mapping_error(dp->dev, dma_addr))
2151 goto err_dma_warn;
2152
2153 wr_idx = D_IDX(tx_ring, tx_ring->wr_p);
2154
2155
2156 txbuf = &tx_ring->txbufs[wr_idx];
2157 txbuf->skb = skb;
2158 txbuf->dma_addr = dma_addr;
2159 txbuf->fidx = -1;
2160 txbuf->pkt_cnt = 1;
2161 txbuf->real_len = real_len;
2162
2163
2164 txd = &tx_ring->txds[wr_idx];
2165 txd->offset_eop = meta_len | PCIE_DESC_TX_EOP;
2166 txd->dma_len = cpu_to_le16(skb_headlen(skb));
2167 nfp_desc_set_dma_addr(txd, dma_addr);
2168 txd->data_len = cpu_to_le16(skb->len);
2169
2170 txd->flags = 0;
2171 txd->mss = 0;
2172 txd->lso_hdrlen = 0;
2173
2174 tx_ring->wr_p++;
2175 tx_ring->wr_ptr_add++;
2176 nfp_net_tx_xmit_more_flush(tx_ring);
2177
2178 return false;
2179
2180err_dma_warn:
2181 nn_dp_warn(dp, "Failed to DMA map TX CTRL buffer\n");
2182err_free:
2183 u64_stats_update_begin(&r_vec->tx_sync);
2184 r_vec->tx_errors++;
2185 u64_stats_update_end(&r_vec->tx_sync);
2186 dev_kfree_skb_any(skb);
2187 return false;
2188}
2189
2190bool __nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb)
2191{
2192 struct nfp_net_r_vector *r_vec = &nn->r_vecs[0];
2193
2194 return nfp_ctrl_tx_one(nn, r_vec, skb, false);
2195}
2196
2197bool nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb)
2198{
2199 struct nfp_net_r_vector *r_vec = &nn->r_vecs[0];
2200 bool ret;
2201
2202 spin_lock_bh(&r_vec->lock);
2203 ret = nfp_ctrl_tx_one(nn, r_vec, skb, false);
2204 spin_unlock_bh(&r_vec->lock);
2205
2206 return ret;
2207}
2208
2209static void __nfp_ctrl_tx_queued(struct nfp_net_r_vector *r_vec)
2210{
2211 struct sk_buff *skb;
2212
2213 while ((skb = __skb_dequeue(&r_vec->queue)))
2214 if (nfp_ctrl_tx_one(r_vec->nfp_net, r_vec, skb, true))
2215 return;
2216}
2217
2218static bool
2219nfp_ctrl_meta_ok(struct nfp_net *nn, void *data, unsigned int meta_len)
2220{
2221 u32 meta_type, meta_tag;
2222
2223 if (!nfp_app_ctrl_has_meta(nn->app))
2224 return !meta_len;
2225
2226 if (meta_len != 8)
2227 return false;
2228
2229 meta_type = get_unaligned_be32(data);
2230 meta_tag = get_unaligned_be32(data + 4);
2231
2232 return (meta_type == NFP_NET_META_PORTID &&
2233 meta_tag == NFP_META_PORT_ID_CTRL);
2234}
2235
2236static bool
2237nfp_ctrl_rx_one(struct nfp_net *nn, struct nfp_net_dp *dp,
2238 struct nfp_net_r_vector *r_vec, struct nfp_net_rx_ring *rx_ring)
2239{
2240 unsigned int meta_len, data_len, meta_off, pkt_len, pkt_off;
2241 struct nfp_net_rx_buf *rxbuf;
2242 struct nfp_net_rx_desc *rxd;
2243 dma_addr_t new_dma_addr;
2244 struct sk_buff *skb;
2245 void *new_frag;
2246 int idx;
2247
2248 idx = D_IDX(rx_ring, rx_ring->rd_p);
2249
2250 rxd = &rx_ring->rxds[idx];
2251 if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD))
2252 return false;
2253
2254
2255
2256
2257 dma_rmb();
2258
2259 rx_ring->rd_p++;
2260
2261 rxbuf = &rx_ring->rxbufs[idx];
2262 meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK;
2263 data_len = le16_to_cpu(rxd->rxd.data_len);
2264 pkt_len = data_len - meta_len;
2265
2266 pkt_off = NFP_NET_RX_BUF_HEADROOM + dp->rx_dma_off;
2267 if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC)
2268 pkt_off += meta_len;
2269 else
2270 pkt_off += dp->rx_offset;
2271 meta_off = pkt_off - meta_len;
2272
2273
2274 u64_stats_update_begin(&r_vec->rx_sync);
2275 r_vec->rx_pkts++;
2276 r_vec->rx_bytes += pkt_len;
2277 u64_stats_update_end(&r_vec->rx_sync);
2278
2279 nfp_net_dma_sync_cpu_rx(dp, rxbuf->dma_addr + meta_off, data_len);
2280
2281 if (unlikely(!nfp_ctrl_meta_ok(nn, rxbuf->frag + meta_off, meta_len))) {
2282 nn_dp_warn(dp, "incorrect metadata for ctrl packet (%d)\n",
2283 meta_len);
2284 nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL);
2285 return true;
2286 }
2287
2288 skb = build_skb(rxbuf->frag, dp->fl_bufsz);
2289 if (unlikely(!skb)) {
2290 nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL);
2291 return true;
2292 }
2293 new_frag = nfp_net_napi_alloc_one(dp, &new_dma_addr);
2294 if (unlikely(!new_frag)) {
2295 nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb);
2296 return true;
2297 }
2298
2299 nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr);
2300
2301 nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr);
2302
2303 skb_reserve(skb, pkt_off);
2304 skb_put(skb, pkt_len);
2305
2306 nfp_app_ctrl_rx(nn->app, skb);
2307
2308 return true;
2309}
2310
2311static bool nfp_ctrl_rx(struct nfp_net_r_vector *r_vec)
2312{
2313 struct nfp_net_rx_ring *rx_ring = r_vec->rx_ring;
2314 struct nfp_net *nn = r_vec->nfp_net;
2315 struct nfp_net_dp *dp = &nn->dp;
2316 unsigned int budget = 512;
2317
2318 while (nfp_ctrl_rx_one(nn, dp, r_vec, rx_ring) && budget--)
2319 continue;
2320
2321 return budget;
2322}
2323
2324static void nfp_ctrl_poll(struct tasklet_struct *t)
2325{
2326 struct nfp_net_r_vector *r_vec = from_tasklet(r_vec, t, tasklet);
2327
2328 spin_lock(&r_vec->lock);
2329 nfp_net_tx_complete(r_vec->tx_ring, 0);
2330 __nfp_ctrl_tx_queued(r_vec);
2331 spin_unlock(&r_vec->lock);
2332
2333 if (nfp_ctrl_rx(r_vec)) {
2334 nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_entry);
2335 } else {
2336 tasklet_schedule(&r_vec->tasklet);
2337 nn_dp_warn(&r_vec->nfp_net->dp,
2338 "control message budget exceeded!\n");
2339 }
2340}
2341
2342
2343
2344
2345
2346
2347
2348
2349static void nfp_net_vecs_init(struct nfp_net *nn)
2350{
2351 struct nfp_net_r_vector *r_vec;
2352 int r;
2353
2354 nn->lsc_handler = nfp_net_irq_lsc;
2355 nn->exn_handler = nfp_net_irq_exn;
2356
2357 for (r = 0; r < nn->max_r_vecs; r++) {
2358 struct msix_entry *entry;
2359
2360 entry = &nn->irq_entries[NFP_NET_NON_Q_VECTORS + r];
2361
2362 r_vec = &nn->r_vecs[r];
2363 r_vec->nfp_net = nn;
2364 r_vec->irq_entry = entry->entry;
2365 r_vec->irq_vector = entry->vector;
2366
2367 if (nn->dp.netdev) {
2368 r_vec->handler = nfp_net_irq_rxtx;
2369 } else {
2370 r_vec->handler = nfp_ctrl_irq_rxtx;
2371
2372 __skb_queue_head_init(&r_vec->queue);
2373 spin_lock_init(&r_vec->lock);
2374 tasklet_setup(&r_vec->tasklet, nfp_ctrl_poll);
2375 tasklet_disable(&r_vec->tasklet);
2376 }
2377
2378 cpumask_set_cpu(r, &r_vec->affinity_mask);
2379 }
2380}
2381
2382
2383
2384
2385
2386static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring)
2387{
2388 struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
2389 struct nfp_net_dp *dp = &r_vec->nfp_net->dp;
2390
2391 kvfree(tx_ring->txbufs);
2392
2393 if (tx_ring->txds)
2394 dma_free_coherent(dp->dev, tx_ring->size,
2395 tx_ring->txds, tx_ring->dma);
2396
2397 tx_ring->cnt = 0;
2398 tx_ring->txbufs = NULL;
2399 tx_ring->txds = NULL;
2400 tx_ring->dma = 0;
2401 tx_ring->size = 0;
2402}
2403
2404
2405
2406
2407
2408
2409
2410
2411static int
2412nfp_net_tx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring)
2413{
2414 struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
2415
2416 tx_ring->cnt = dp->txd_cnt;
2417
2418 tx_ring->size = array_size(tx_ring->cnt, sizeof(*tx_ring->txds));
2419 tx_ring->txds = dma_alloc_coherent(dp->dev, tx_ring->size,
2420 &tx_ring->dma,
2421 GFP_KERNEL | __GFP_NOWARN);
2422 if (!tx_ring->txds) {
2423 netdev_warn(dp->netdev, "failed to allocate TX descriptor ring memory, requested descriptor count: %d, consider lowering descriptor count\n",
2424 tx_ring->cnt);
2425 goto err_alloc;
2426 }
2427
2428 tx_ring->txbufs = kvcalloc(tx_ring->cnt, sizeof(*tx_ring->txbufs),
2429 GFP_KERNEL);
2430 if (!tx_ring->txbufs)
2431 goto err_alloc;
2432
2433 if (!tx_ring->is_xdp && dp->netdev)
2434 netif_set_xps_queue(dp->netdev, &r_vec->affinity_mask,
2435 tx_ring->idx);
2436
2437 return 0;
2438
2439err_alloc:
2440 nfp_net_tx_ring_free(tx_ring);
2441 return -ENOMEM;
2442}
2443
2444static void
2445nfp_net_tx_ring_bufs_free(struct nfp_net_dp *dp,
2446 struct nfp_net_tx_ring *tx_ring)
2447{
2448 unsigned int i;
2449
2450 if (!tx_ring->is_xdp)
2451 return;
2452
2453 for (i = 0; i < tx_ring->cnt; i++) {
2454 if (!tx_ring->txbufs[i].frag)
2455 return;
2456
2457 nfp_net_dma_unmap_rx(dp, tx_ring->txbufs[i].dma_addr);
2458 __free_page(virt_to_page(tx_ring->txbufs[i].frag));
2459 }
2460}
2461
2462static int
2463nfp_net_tx_ring_bufs_alloc(struct nfp_net_dp *dp,
2464 struct nfp_net_tx_ring *tx_ring)
2465{
2466 struct nfp_net_tx_buf *txbufs = tx_ring->txbufs;
2467 unsigned int i;
2468
2469 if (!tx_ring->is_xdp)
2470 return 0;
2471
2472 for (i = 0; i < tx_ring->cnt; i++) {
2473 txbufs[i].frag = nfp_net_rx_alloc_one(dp, &txbufs[i].dma_addr);
2474 if (!txbufs[i].frag) {
2475 nfp_net_tx_ring_bufs_free(dp, tx_ring);
2476 return -ENOMEM;
2477 }
2478 }
2479
2480 return 0;
2481}
2482
2483static int nfp_net_tx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp)
2484{
2485 unsigned int r;
2486
2487 dp->tx_rings = kcalloc(dp->num_tx_rings, sizeof(*dp->tx_rings),
2488 GFP_KERNEL);
2489 if (!dp->tx_rings)
2490 return -ENOMEM;
2491
2492 for (r = 0; r < dp->num_tx_rings; r++) {
2493 int bias = 0;
2494
2495 if (r >= dp->num_stack_tx_rings)
2496 bias = dp->num_stack_tx_rings;
2497
2498 nfp_net_tx_ring_init(&dp->tx_rings[r], &nn->r_vecs[r - bias],
2499 r, bias);
2500
2501 if (nfp_net_tx_ring_alloc(dp, &dp->tx_rings[r]))
2502 goto err_free_prev;
2503
2504 if (nfp_net_tx_ring_bufs_alloc(dp, &dp->tx_rings[r]))
2505 goto err_free_ring;
2506 }
2507
2508 return 0;
2509
2510err_free_prev:
2511 while (r--) {
2512 nfp_net_tx_ring_bufs_free(dp, &dp->tx_rings[r]);
2513err_free_ring:
2514 nfp_net_tx_ring_free(&dp->tx_rings[r]);
2515 }
2516 kfree(dp->tx_rings);
2517 return -ENOMEM;
2518}
2519
2520static void nfp_net_tx_rings_free(struct nfp_net_dp *dp)
2521{
2522 unsigned int r;
2523
2524 for (r = 0; r < dp->num_tx_rings; r++) {
2525 nfp_net_tx_ring_bufs_free(dp, &dp->tx_rings[r]);
2526 nfp_net_tx_ring_free(&dp->tx_rings[r]);
2527 }
2528
2529 kfree(dp->tx_rings);
2530}
2531
2532
2533
2534
2535
2536static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring)
2537{
2538 struct nfp_net_r_vector *r_vec = rx_ring->r_vec;
2539 struct nfp_net_dp *dp = &r_vec->nfp_net->dp;
2540
2541 if (dp->netdev)
2542 xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
2543 kvfree(rx_ring->rxbufs);
2544
2545 if (rx_ring->rxds)
2546 dma_free_coherent(dp->dev, rx_ring->size,
2547 rx_ring->rxds, rx_ring->dma);
2548
2549 rx_ring->cnt = 0;
2550 rx_ring->rxbufs = NULL;
2551 rx_ring->rxds = NULL;
2552 rx_ring->dma = 0;
2553 rx_ring->size = 0;
2554}
2555
2556
2557
2558
2559
2560
2561
2562
2563static int
2564nfp_net_rx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring)
2565{
2566 int err;
2567
2568 if (dp->netdev) {
2569 err = xdp_rxq_info_reg(&rx_ring->xdp_rxq, dp->netdev,
2570 rx_ring->idx, rx_ring->r_vec->napi.napi_id);
2571 if (err < 0)
2572 return err;
2573 }
2574
2575 rx_ring->cnt = dp->rxd_cnt;
2576 rx_ring->size = array_size(rx_ring->cnt, sizeof(*rx_ring->rxds));
2577 rx_ring->rxds = dma_alloc_coherent(dp->dev, rx_ring->size,
2578 &rx_ring->dma,
2579 GFP_KERNEL | __GFP_NOWARN);
2580 if (!rx_ring->rxds) {
2581 netdev_warn(dp->netdev, "failed to allocate RX descriptor ring memory, requested descriptor count: %d, consider lowering descriptor count\n",
2582 rx_ring->cnt);
2583 goto err_alloc;
2584 }
2585
2586 rx_ring->rxbufs = kvcalloc(rx_ring->cnt, sizeof(*rx_ring->rxbufs),
2587 GFP_KERNEL);
2588 if (!rx_ring->rxbufs)
2589 goto err_alloc;
2590
2591 return 0;
2592
2593err_alloc:
2594 nfp_net_rx_ring_free(rx_ring);
2595 return -ENOMEM;
2596}
2597
2598static int nfp_net_rx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp)
2599{
2600 unsigned int r;
2601
2602 dp->rx_rings = kcalloc(dp->num_rx_rings, sizeof(*dp->rx_rings),
2603 GFP_KERNEL);
2604 if (!dp->rx_rings)
2605 return -ENOMEM;
2606
2607 for (r = 0; r < dp->num_rx_rings; r++) {
2608 nfp_net_rx_ring_init(&dp->rx_rings[r], &nn->r_vecs[r], r);
2609
2610 if (nfp_net_rx_ring_alloc(dp, &dp->rx_rings[r]))
2611 goto err_free_prev;
2612
2613 if (nfp_net_rx_ring_bufs_alloc(dp, &dp->rx_rings[r]))
2614 goto err_free_ring;
2615 }
2616
2617 return 0;
2618
2619err_free_prev:
2620 while (r--) {
2621 nfp_net_rx_ring_bufs_free(dp, &dp->rx_rings[r]);
2622err_free_ring:
2623 nfp_net_rx_ring_free(&dp->rx_rings[r]);
2624 }
2625 kfree(dp->rx_rings);
2626 return -ENOMEM;
2627}
2628
2629static void nfp_net_rx_rings_free(struct nfp_net_dp *dp)
2630{
2631 unsigned int r;
2632
2633 for (r = 0; r < dp->num_rx_rings; r++) {
2634 nfp_net_rx_ring_bufs_free(dp, &dp->rx_rings[r]);
2635 nfp_net_rx_ring_free(&dp->rx_rings[r]);
2636 }
2637
2638 kfree(dp->rx_rings);
2639}
2640
2641static void
2642nfp_net_vector_assign_rings(struct nfp_net_dp *dp,
2643 struct nfp_net_r_vector *r_vec, int idx)
2644{
2645 r_vec->rx_ring = idx < dp->num_rx_rings ? &dp->rx_rings[idx] : NULL;
2646 r_vec->tx_ring =
2647 idx < dp->num_stack_tx_rings ? &dp->tx_rings[idx] : NULL;
2648
2649 r_vec->xdp_ring = idx < dp->num_tx_rings - dp->num_stack_tx_rings ?
2650 &dp->tx_rings[dp->num_stack_tx_rings + idx] : NULL;
2651}
2652
2653static int
2654nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
2655 int idx)
2656{
2657 int err;
2658
2659
2660 if (nn->dp.netdev)
2661 netif_napi_add(nn->dp.netdev, &r_vec->napi,
2662 nfp_net_poll, NAPI_POLL_WEIGHT);
2663 else
2664 tasklet_enable(&r_vec->tasklet);
2665
2666 snprintf(r_vec->name, sizeof(r_vec->name),
2667 "%s-rxtx-%d", nfp_net_name(nn), idx);
2668 err = request_irq(r_vec->irq_vector, r_vec->handler, 0, r_vec->name,
2669 r_vec);
2670 if (err) {
2671 if (nn->dp.netdev)
2672 netif_napi_del(&r_vec->napi);
2673 else
2674 tasklet_disable(&r_vec->tasklet);
2675
2676 nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector);
2677 return err;
2678 }
2679 disable_irq(r_vec->irq_vector);
2680
2681 irq_set_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask);
2682
2683 nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, r_vec->irq_vector,
2684 r_vec->irq_entry);
2685
2686 return 0;
2687}
2688
2689static void
2690nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec)
2691{
2692 irq_set_affinity_hint(r_vec->irq_vector, NULL);
2693 if (nn->dp.netdev)
2694 netif_napi_del(&r_vec->napi);
2695 else
2696 tasklet_disable(&r_vec->tasklet);
2697
2698 free_irq(r_vec->irq_vector, r_vec);
2699}
2700
2701
2702
2703
2704
2705void nfp_net_rss_write_itbl(struct nfp_net *nn)
2706{
2707 int i;
2708
2709 for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4)
2710 nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i,
2711 get_unaligned_le32(nn->rss_itbl + i));
2712}
2713
2714
2715
2716
2717
2718void nfp_net_rss_write_key(struct nfp_net *nn)
2719{
2720 int i;
2721
2722 for (i = 0; i < nfp_net_rss_key_sz(nn); i += 4)
2723 nn_writel(nn, NFP_NET_CFG_RSS_KEY + i,
2724 get_unaligned_le32(nn->rss_key + i));
2725}
2726
2727
2728
2729
2730
2731void nfp_net_coalesce_write_cfg(struct nfp_net *nn)
2732{
2733 u8 i;
2734 u32 factor;
2735 u32 value;
2736
2737
2738
2739
2740
2741 factor = nn->tlv_caps.me_freq_mhz / 16;
2742
2743
2744 value = (nn->rx_coalesce_max_frames << 16) |
2745 (factor * nn->rx_coalesce_usecs);
2746 for (i = 0; i < nn->dp.num_rx_rings; i++)
2747 nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value);
2748
2749
2750 value = (nn->tx_coalesce_max_frames << 16) |
2751 (factor * nn->tx_coalesce_usecs);
2752 for (i = 0; i < nn->dp.num_tx_rings; i++)
2753 nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value);
2754}
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *addr)
2766{
2767 nn_writel(nn, NFP_NET_CFG_MACADDR + 0, get_unaligned_be32(addr));
2768 nn_writew(nn, NFP_NET_CFG_MACADDR + 6, get_unaligned_be16(addr + 4));
2769}
2770
2771static void nfp_net_vec_clear_ring_data(struct nfp_net *nn, unsigned int idx)
2772{
2773 nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), 0);
2774 nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), 0);
2775 nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), 0);
2776
2777 nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), 0);
2778 nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), 0);
2779 nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), 0);
2780}
2781
2782
2783
2784
2785
2786
2787
2788static void nfp_net_clear_config_and_disable(struct nfp_net *nn)
2789{
2790 u32 new_ctrl, update;
2791 unsigned int r;
2792 int err;
2793
2794 new_ctrl = nn->dp.ctrl;
2795 new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE;
2796 update = NFP_NET_CFG_UPDATE_GEN;
2797 update |= NFP_NET_CFG_UPDATE_MSIX;
2798 update |= NFP_NET_CFG_UPDATE_RING;
2799
2800 if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
2801 new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG;
2802
2803 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
2804 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
2805
2806 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
2807 err = nfp_net_reconfig(nn, update);
2808 if (err)
2809 nn_err(nn, "Could not disable device: %d\n", err);
2810
2811 for (r = 0; r < nn->dp.num_rx_rings; r++)
2812 nfp_net_rx_ring_reset(&nn->dp.rx_rings[r]);
2813 for (r = 0; r < nn->dp.num_tx_rings; r++)
2814 nfp_net_tx_ring_reset(&nn->dp, &nn->dp.tx_rings[r]);
2815 for (r = 0; r < nn->dp.num_r_vecs; r++)
2816 nfp_net_vec_clear_ring_data(nn, r);
2817
2818 nn->dp.ctrl = new_ctrl;
2819}
2820
2821static void
2822nfp_net_rx_ring_hw_cfg_write(struct nfp_net *nn,
2823 struct nfp_net_rx_ring *rx_ring, unsigned int idx)
2824{
2825
2826 nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), rx_ring->dma);
2827 nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), ilog2(rx_ring->cnt));
2828 nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), rx_ring->r_vec->irq_entry);
2829}
2830
2831static void
2832nfp_net_tx_ring_hw_cfg_write(struct nfp_net *nn,
2833 struct nfp_net_tx_ring *tx_ring, unsigned int idx)
2834{
2835 nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), tx_ring->dma);
2836 nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), ilog2(tx_ring->cnt));
2837 nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), tx_ring->r_vec->irq_entry);
2838}
2839
2840
2841
2842
2843
2844static int nfp_net_set_config_and_enable(struct nfp_net *nn)
2845{
2846 u32 bufsz, new_ctrl, update = 0;
2847 unsigned int r;
2848 int err;
2849
2850 new_ctrl = nn->dp.ctrl;
2851
2852 if (nn->dp.ctrl & NFP_NET_CFG_CTRL_RSS_ANY) {
2853 nfp_net_rss_write_key(nn);
2854 nfp_net_rss_write_itbl(nn);
2855 nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg);
2856 update |= NFP_NET_CFG_UPDATE_RSS;
2857 }
2858
2859 if (nn->dp.ctrl & NFP_NET_CFG_CTRL_IRQMOD) {
2860 nfp_net_coalesce_write_cfg(nn);
2861 update |= NFP_NET_CFG_UPDATE_IRQMOD;
2862 }
2863
2864 for (r = 0; r < nn->dp.num_tx_rings; r++)
2865 nfp_net_tx_ring_hw_cfg_write(nn, &nn->dp.tx_rings[r], r);
2866 for (r = 0; r < nn->dp.num_rx_rings; r++)
2867 nfp_net_rx_ring_hw_cfg_write(nn, &nn->dp.rx_rings[r], r);
2868
2869 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->dp.num_tx_rings == 64 ?
2870 0xffffffffffffffffULL : ((u64)1 << nn->dp.num_tx_rings) - 1);
2871
2872 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->dp.num_rx_rings == 64 ?
2873 0xffffffffffffffffULL : ((u64)1 << nn->dp.num_rx_rings) - 1);
2874
2875 if (nn->dp.netdev)
2876 nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr);
2877
2878 nn_writel(nn, NFP_NET_CFG_MTU, nn->dp.mtu);
2879
2880 bufsz = nn->dp.fl_bufsz - nn->dp.rx_dma_off - NFP_NET_RX_BUF_NON_DATA;
2881 nn_writel(nn, NFP_NET_CFG_FLBUFSZ, bufsz);
2882
2883
2884 new_ctrl |= NFP_NET_CFG_CTRL_ENABLE;
2885 update |= NFP_NET_CFG_UPDATE_GEN;
2886 update |= NFP_NET_CFG_UPDATE_MSIX;
2887 update |= NFP_NET_CFG_UPDATE_RING;
2888 if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
2889 new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG;
2890
2891 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
2892 err = nfp_net_reconfig(nn, update);
2893 if (err) {
2894 nfp_net_clear_config_and_disable(nn);
2895 return err;
2896 }
2897
2898 nn->dp.ctrl = new_ctrl;
2899
2900 for (r = 0; r < nn->dp.num_rx_rings; r++)
2901 nfp_net_rx_ring_fill_freelist(&nn->dp, &nn->dp.rx_rings[r]);
2902
2903 return 0;
2904}
2905
2906
2907
2908
2909
2910static void nfp_net_close_stack(struct nfp_net *nn)
2911{
2912 struct nfp_net_r_vector *r_vec;
2913 unsigned int r;
2914
2915 disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
2916 netif_carrier_off(nn->dp.netdev);
2917 nn->link_up = false;
2918
2919 for (r = 0; r < nn->dp.num_r_vecs; r++) {
2920 r_vec = &nn->r_vecs[r];
2921
2922 disable_irq(r_vec->irq_vector);
2923 napi_disable(&r_vec->napi);
2924
2925 if (r_vec->rx_ring)
2926 cancel_work_sync(&r_vec->rx_dim.work);
2927
2928 if (r_vec->tx_ring)
2929 cancel_work_sync(&r_vec->tx_dim.work);
2930 }
2931
2932 netif_tx_disable(nn->dp.netdev);
2933}
2934
2935
2936
2937
2938
2939static void nfp_net_close_free_all(struct nfp_net *nn)
2940{
2941 unsigned int r;
2942
2943 nfp_net_tx_rings_free(&nn->dp);
2944 nfp_net_rx_rings_free(&nn->dp);
2945
2946 for (r = 0; r < nn->dp.num_r_vecs; r++)
2947 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
2948
2949 nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
2950 nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
2951}
2952
2953
2954
2955
2956
2957static int nfp_net_netdev_close(struct net_device *netdev)
2958{
2959 struct nfp_net *nn = netdev_priv(netdev);
2960
2961
2962
2963 nfp_net_close_stack(nn);
2964
2965
2966
2967 nfp_net_clear_config_and_disable(nn);
2968 nfp_port_configure(netdev, false);
2969
2970
2971
2972 nfp_net_close_free_all(nn);
2973
2974 nn_dbg(nn, "%s down", netdev->name);
2975 return 0;
2976}
2977
2978void nfp_ctrl_close(struct nfp_net *nn)
2979{
2980 int r;
2981
2982 rtnl_lock();
2983
2984 for (r = 0; r < nn->dp.num_r_vecs; r++) {
2985 disable_irq(nn->r_vecs[r].irq_vector);
2986 tasklet_disable(&nn->r_vecs[r].tasklet);
2987 }
2988
2989 nfp_net_clear_config_and_disable(nn);
2990
2991 nfp_net_close_free_all(nn);
2992
2993 rtnl_unlock();
2994}
2995
2996static void nfp_net_rx_dim_work(struct work_struct *work)
2997{
2998 struct nfp_net_r_vector *r_vec;
2999 unsigned int factor, value;
3000 struct dim_cq_moder moder;
3001 struct nfp_net *nn;
3002 struct dim *dim;
3003
3004 dim = container_of(work, struct dim, work);
3005 moder = net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
3006 r_vec = container_of(dim, struct nfp_net_r_vector, rx_dim);
3007 nn = r_vec->nfp_net;
3008
3009
3010
3011
3012
3013 factor = nn->tlv_caps.me_freq_mhz / 16;
3014 if (nfp_net_coalesce_para_check(factor * moder.usec, moder.pkts))
3015 return;
3016
3017
3018 value = (moder.pkts << 16) | (factor * moder.usec);
3019 rtnl_lock();
3020 nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(r_vec->rx_ring->idx), value);
3021 (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
3022 rtnl_unlock();
3023
3024 dim->state = DIM_START_MEASURE;
3025}
3026
3027static void nfp_net_tx_dim_work(struct work_struct *work)
3028{
3029 struct nfp_net_r_vector *r_vec;
3030 unsigned int factor, value;
3031 struct dim_cq_moder moder;
3032 struct nfp_net *nn;
3033 struct dim *dim;
3034
3035 dim = container_of(work, struct dim, work);
3036 moder = net_dim_get_tx_moderation(dim->mode, dim->profile_ix);
3037 r_vec = container_of(dim, struct nfp_net_r_vector, tx_dim);
3038 nn = r_vec->nfp_net;
3039
3040
3041
3042
3043
3044 factor = nn->tlv_caps.me_freq_mhz / 16;
3045 if (nfp_net_coalesce_para_check(factor * moder.usec, moder.pkts))
3046 return;
3047
3048
3049 value = (moder.pkts << 16) | (factor * moder.usec);
3050 rtnl_lock();
3051 nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(r_vec->tx_ring->idx), value);
3052 (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
3053 rtnl_unlock();
3054
3055 dim->state = DIM_START_MEASURE;
3056}
3057
3058
3059
3060
3061
3062static void nfp_net_open_stack(struct nfp_net *nn)
3063{
3064 struct nfp_net_r_vector *r_vec;
3065 unsigned int r;
3066
3067 for (r = 0; r < nn->dp.num_r_vecs; r++) {
3068 r_vec = &nn->r_vecs[r];
3069
3070 if (r_vec->rx_ring) {
3071 INIT_WORK(&r_vec->rx_dim.work, nfp_net_rx_dim_work);
3072 r_vec->rx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
3073 }
3074
3075 if (r_vec->tx_ring) {
3076 INIT_WORK(&r_vec->tx_dim.work, nfp_net_tx_dim_work);
3077 r_vec->tx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
3078 }
3079
3080 napi_enable(&r_vec->napi);
3081 enable_irq(r_vec->irq_vector);
3082 }
3083
3084 netif_tx_wake_all_queues(nn->dp.netdev);
3085
3086 enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
3087 nfp_net_read_link_status(nn);
3088}
3089
3090static int nfp_net_open_alloc_all(struct nfp_net *nn)
3091{
3092 int err, r;
3093
3094 err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn",
3095 nn->exn_name, sizeof(nn->exn_name),
3096 NFP_NET_IRQ_EXN_IDX, nn->exn_handler);
3097 if (err)
3098 return err;
3099 err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc",
3100 nn->lsc_name, sizeof(nn->lsc_name),
3101 NFP_NET_IRQ_LSC_IDX, nn->lsc_handler);
3102 if (err)
3103 goto err_free_exn;
3104 disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
3105
3106 for (r = 0; r < nn->dp.num_r_vecs; r++) {
3107 err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
3108 if (err)
3109 goto err_cleanup_vec_p;
3110 }
3111
3112 err = nfp_net_rx_rings_prepare(nn, &nn->dp);
3113 if (err)
3114 goto err_cleanup_vec;
3115
3116 err = nfp_net_tx_rings_prepare(nn, &nn->dp);
3117 if (err)
3118 goto err_free_rx_rings;
3119
3120 for (r = 0; r < nn->max_r_vecs; r++)
3121 nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
3122
3123 return 0;
3124
3125err_free_rx_rings:
3126 nfp_net_rx_rings_free(&nn->dp);
3127err_cleanup_vec:
3128 r = nn->dp.num_r_vecs;
3129err_cleanup_vec_p:
3130 while (r--)
3131 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
3132 nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
3133err_free_exn:
3134 nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
3135 return err;
3136}
3137
3138static int nfp_net_netdev_open(struct net_device *netdev)
3139{
3140 struct nfp_net *nn = netdev_priv(netdev);
3141 int err;
3142
3143
3144
3145
3146
3147
3148 err = nfp_net_open_alloc_all(nn);
3149 if (err)
3150 return err;
3151
3152 err = netif_set_real_num_tx_queues(netdev, nn->dp.num_stack_tx_rings);
3153 if (err)
3154 goto err_free_all;
3155
3156 err = netif_set_real_num_rx_queues(netdev, nn->dp.num_rx_rings);
3157 if (err)
3158 goto err_free_all;
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168 err = nfp_port_configure(netdev, true);
3169 if (err)
3170 goto err_free_all;
3171
3172 err = nfp_net_set_config_and_enable(nn);
3173 if (err)
3174 goto err_port_disable;
3175
3176
3177
3178
3179
3180
3181
3182 nfp_net_open_stack(nn);
3183
3184 return 0;
3185
3186err_port_disable:
3187 nfp_port_configure(netdev, false);
3188err_free_all:
3189 nfp_net_close_free_all(nn);
3190 return err;
3191}
3192
3193int nfp_ctrl_open(struct nfp_net *nn)
3194{
3195 int err, r;
3196
3197
3198 rtnl_lock();
3199
3200 err = nfp_net_open_alloc_all(nn);
3201 if (err)
3202 goto err_unlock;
3203
3204 err = nfp_net_set_config_and_enable(nn);
3205 if (err)
3206 goto err_free_all;
3207
3208 for (r = 0; r < nn->dp.num_r_vecs; r++)
3209 enable_irq(nn->r_vecs[r].irq_vector);
3210
3211 rtnl_unlock();
3212
3213 return 0;
3214
3215err_free_all:
3216 nfp_net_close_free_all(nn);
3217err_unlock:
3218 rtnl_unlock();
3219 return err;
3220}
3221
3222static void nfp_net_set_rx_mode(struct net_device *netdev)
3223{
3224 struct nfp_net *nn = netdev_priv(netdev);
3225 u32 new_ctrl;
3226
3227 new_ctrl = nn->dp.ctrl;
3228
3229 if (!netdev_mc_empty(netdev) || netdev->flags & IFF_ALLMULTI)
3230 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_L2MC;
3231 else
3232 new_ctrl &= ~NFP_NET_CFG_CTRL_L2MC;
3233
3234 if (netdev->flags & IFF_PROMISC) {
3235 if (nn->cap & NFP_NET_CFG_CTRL_PROMISC)
3236 new_ctrl |= NFP_NET_CFG_CTRL_PROMISC;
3237 else
3238 nn_warn(nn, "FW does not support promiscuous mode\n");
3239 } else {
3240 new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC;
3241 }
3242
3243 if (new_ctrl == nn->dp.ctrl)
3244 return;
3245
3246 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
3247 nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN);
3248
3249 nn->dp.ctrl = new_ctrl;
3250}
3251
3252static void nfp_net_rss_init_itbl(struct nfp_net *nn)
3253{
3254 int i;
3255
3256 for (i = 0; i < sizeof(nn->rss_itbl); i++)
3257 nn->rss_itbl[i] =
3258 ethtool_rxfh_indir_default(i, nn->dp.num_rx_rings);
3259}
3260
3261static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp)
3262{
3263 struct nfp_net_dp new_dp = *dp;
3264
3265 *dp = nn->dp;
3266 nn->dp = new_dp;
3267
3268 nn->dp.netdev->mtu = new_dp.mtu;
3269
3270 if (!netif_is_rxfh_configured(nn->dp.netdev))
3271 nfp_net_rss_init_itbl(nn);
3272}
3273
3274static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp)
3275{
3276 unsigned int r;
3277 int err;
3278
3279 nfp_net_dp_swap(nn, dp);
3280
3281 for (r = 0; r < nn->max_r_vecs; r++)
3282 nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
3283
3284 err = netif_set_real_num_queues(nn->dp.netdev,
3285 nn->dp.num_stack_tx_rings,
3286 nn->dp.num_rx_rings);
3287 if (err)
3288 return err;
3289
3290 return nfp_net_set_config_and_enable(nn);
3291}
3292
3293struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn)
3294{
3295 struct nfp_net_dp *new;
3296
3297 new = kmalloc(sizeof(*new), GFP_KERNEL);
3298 if (!new)
3299 return NULL;
3300
3301 *new = nn->dp;
3302
3303
3304 new->fl_bufsz = 0;
3305 new->tx_rings = NULL;
3306 new->rx_rings = NULL;
3307 new->num_r_vecs = 0;
3308 new->num_stack_tx_rings = 0;
3309
3310 return new;
3311}
3312
3313static int
3314nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp,
3315 struct netlink_ext_ack *extack)
3316{
3317
3318 if (!dp->xdp_prog)
3319 return 0;
3320 if (dp->fl_bufsz > PAGE_SIZE) {
3321 NL_SET_ERR_MSG_MOD(extack, "MTU too large w/ XDP enabled");
3322 return -EINVAL;
3323 }
3324 if (dp->num_tx_rings > nn->max_tx_rings) {
3325 NL_SET_ERR_MSG_MOD(extack, "Insufficient number of TX rings w/ XDP enabled");
3326 return -EINVAL;
3327 }
3328
3329 return 0;
3330}
3331
3332int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp,
3333 struct netlink_ext_ack *extack)
3334{
3335 int r, err;
3336
3337 dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp);
3338
3339 dp->num_stack_tx_rings = dp->num_tx_rings;
3340 if (dp->xdp_prog)
3341 dp->num_stack_tx_rings -= dp->num_rx_rings;
3342
3343 dp->num_r_vecs = max(dp->num_rx_rings, dp->num_stack_tx_rings);
3344
3345 err = nfp_net_check_config(nn, dp, extack);
3346 if (err)
3347 goto exit_free_dp;
3348
3349 if (!netif_running(dp->netdev)) {
3350 nfp_net_dp_swap(nn, dp);
3351 err = 0;
3352 goto exit_free_dp;
3353 }
3354
3355
3356 for (r = nn->dp.num_r_vecs; r < dp->num_r_vecs; r++) {
3357 err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
3358 if (err) {
3359 dp->num_r_vecs = r;
3360 goto err_cleanup_vecs;
3361 }
3362 }
3363
3364 err = nfp_net_rx_rings_prepare(nn, dp);
3365 if (err)
3366 goto err_cleanup_vecs;
3367
3368 err = nfp_net_tx_rings_prepare(nn, dp);
3369 if (err)
3370 goto err_free_rx;
3371
3372
3373 nfp_net_close_stack(nn);
3374 nfp_net_clear_config_and_disable(nn);
3375
3376 err = nfp_net_dp_swap_enable(nn, dp);
3377 if (err) {
3378 int err2;
3379
3380 nfp_net_clear_config_and_disable(nn);
3381
3382
3383 err2 = nfp_net_dp_swap_enable(nn, dp);
3384 if (err2)
3385 nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n",
3386 err, err2);
3387 }
3388 for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
3389 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
3390
3391 nfp_net_rx_rings_free(dp);
3392 nfp_net_tx_rings_free(dp);
3393
3394 nfp_net_open_stack(nn);
3395exit_free_dp:
3396 kfree(dp);
3397
3398 return err;
3399
3400err_free_rx:
3401 nfp_net_rx_rings_free(dp);
3402err_cleanup_vecs:
3403 for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
3404 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
3405 kfree(dp);
3406 return err;
3407}
3408
3409static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu)
3410{
3411 struct nfp_net *nn = netdev_priv(netdev);
3412 struct nfp_net_dp *dp;
3413 int err;
3414
3415 err = nfp_app_check_mtu(nn->app, netdev, new_mtu);
3416 if (err)
3417 return err;
3418
3419 dp = nfp_net_clone_dp(nn);
3420 if (!dp)
3421 return -ENOMEM;
3422
3423 dp->mtu = new_mtu;
3424
3425 return nfp_net_ring_reconfig(nn, dp, NULL);
3426}
3427
3428static int
3429nfp_net_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
3430{
3431 const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD;
3432 struct nfp_net *nn = netdev_priv(netdev);
3433 int err;
3434
3435
3436
3437
3438 if (!vid)
3439 return 0;
3440
3441 err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ);
3442 if (err)
3443 return err;
3444
3445 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
3446 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
3447 ETH_P_8021Q);
3448
3449 return nfp_net_mbox_reconfig_and_unlock(nn, cmd);
3450}
3451
3452static int
3453nfp_net_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
3454{
3455 const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL;
3456 struct nfp_net *nn = netdev_priv(netdev);
3457 int err;
3458
3459
3460
3461
3462 if (!vid)
3463 return 0;
3464
3465 err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ);
3466 if (err)
3467 return err;
3468
3469 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
3470 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
3471 ETH_P_8021Q);
3472
3473 return nfp_net_mbox_reconfig_and_unlock(nn, cmd);
3474}
3475
3476static void nfp_net_stat64(struct net_device *netdev,
3477 struct rtnl_link_stats64 *stats)
3478{
3479 struct nfp_net *nn = netdev_priv(netdev);
3480 int r;
3481
3482
3483 for (r = 0; r < nn->max_r_vecs; r++) {
3484 struct nfp_net_r_vector *r_vec = &nn->r_vecs[r];
3485 u64 data[3];
3486 unsigned int start;
3487
3488 do {
3489 start = u64_stats_fetch_begin(&r_vec->rx_sync);
3490 data[0] = r_vec->rx_pkts;
3491 data[1] = r_vec->rx_bytes;
3492 data[2] = r_vec->rx_drops;
3493 } while (u64_stats_fetch_retry(&r_vec->rx_sync, start));
3494 stats->rx_packets += data[0];
3495 stats->rx_bytes += data[1];
3496 stats->rx_dropped += data[2];
3497
3498 do {
3499 start = u64_stats_fetch_begin(&r_vec->tx_sync);
3500 data[0] = r_vec->tx_pkts;
3501 data[1] = r_vec->tx_bytes;
3502 data[2] = r_vec->tx_errors;
3503 } while (u64_stats_fetch_retry(&r_vec->tx_sync, start));
3504 stats->tx_packets += data[0];
3505 stats->tx_bytes += data[1];
3506 stats->tx_errors += data[2];
3507 }
3508
3509
3510 stats->multicast += nn_readq(nn, NFP_NET_CFG_STATS_RX_MC_FRAMES);
3511 stats->rx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_RX_DISCARDS);
3512 stats->rx_errors += nn_readq(nn, NFP_NET_CFG_STATS_RX_ERRORS);
3513
3514 stats->tx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_TX_DISCARDS);
3515 stats->tx_errors += nn_readq(nn, NFP_NET_CFG_STATS_TX_ERRORS);
3516}
3517
3518static int nfp_net_set_features(struct net_device *netdev,
3519 netdev_features_t features)
3520{
3521 netdev_features_t changed = netdev->features ^ features;
3522 struct nfp_net *nn = netdev_priv(netdev);
3523 u32 new_ctrl;
3524 int err;
3525
3526
3527
3528 new_ctrl = nn->dp.ctrl;
3529
3530 if (changed & NETIF_F_RXCSUM) {
3531 if (features & NETIF_F_RXCSUM)
3532 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
3533 else
3534 new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM_ANY;
3535 }
3536
3537 if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) {
3538 if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
3539 new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
3540 else
3541 new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM;
3542 }
3543
3544 if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) {
3545 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
3546 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
3547 NFP_NET_CFG_CTRL_LSO;
3548 else
3549 new_ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY;
3550 }
3551
3552 if (changed & NETIF_F_HW_VLAN_CTAG_RX) {
3553 if (features & NETIF_F_HW_VLAN_CTAG_RX)
3554 new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN;
3555 else
3556 new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN;
3557 }
3558
3559 if (changed & NETIF_F_HW_VLAN_CTAG_TX) {
3560 if (features & NETIF_F_HW_VLAN_CTAG_TX)
3561 new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN;
3562 else
3563 new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN;
3564 }
3565
3566 if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) {
3567 if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
3568 new_ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
3569 else
3570 new_ctrl &= ~NFP_NET_CFG_CTRL_CTAG_FILTER;
3571 }
3572
3573 if (changed & NETIF_F_SG) {
3574 if (features & NETIF_F_SG)
3575 new_ctrl |= NFP_NET_CFG_CTRL_GATHER;
3576 else
3577 new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER;
3578 }
3579
3580 err = nfp_port_set_features(netdev, features);
3581 if (err)
3582 return err;
3583
3584 nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n",
3585 netdev->features, features, changed);
3586
3587 if (new_ctrl == nn->dp.ctrl)
3588 return 0;
3589
3590 nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->dp.ctrl, new_ctrl);
3591 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
3592 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
3593 if (err)
3594 return err;
3595
3596 nn->dp.ctrl = new_ctrl;
3597
3598 return 0;
3599}
3600
3601static netdev_features_t
3602nfp_net_features_check(struct sk_buff *skb, struct net_device *dev,
3603 netdev_features_t features)
3604{
3605 u8 l4_hdr;
3606
3607
3608 features &= vlan_features_check(skb, features);
3609
3610 if (!skb->encapsulation)
3611 return features;
3612
3613
3614 if (skb_is_gso(skb)) {
3615 u32 hdrlen;
3616
3617 hdrlen = skb_inner_transport_header(skb) - skb->data +
3618 inner_tcp_hdrlen(skb);
3619
3620
3621
3622
3623 if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ - 8))
3624 features &= ~NETIF_F_GSO_MASK;
3625 }
3626
3627
3628 switch (vlan_get_protocol(skb)) {
3629 case htons(ETH_P_IP):
3630 l4_hdr = ip_hdr(skb)->protocol;
3631 break;
3632 case htons(ETH_P_IPV6):
3633 l4_hdr = ipv6_hdr(skb)->nexthdr;
3634 break;
3635 default:
3636 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
3637 }
3638
3639 if (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
3640 skb->inner_protocol != htons(ETH_P_TEB) ||
3641 (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) ||
3642 (l4_hdr == IPPROTO_UDP &&
3643 (skb_inner_mac_header(skb) - skb_transport_header(skb) !=
3644 sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
3645 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
3646
3647 return features;
3648}
3649
3650static int
3651nfp_net_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
3652{
3653 struct nfp_net *nn = netdev_priv(netdev);
3654 int n;
3655
3656
3657
3658
3659 if (nn->port)
3660 return -EOPNOTSUPP;
3661
3662 if (nn->dp.is_vf || nn->vnic_no_name)
3663 return -EOPNOTSUPP;
3664
3665 n = snprintf(name, len, "n%d", nn->id);
3666 if (n >= len)
3667 return -EINVAL;
3668
3669 return 0;
3670}
3671
3672static int nfp_net_xdp_setup_drv(struct nfp_net *nn, struct netdev_bpf *bpf)
3673{
3674 struct bpf_prog *prog = bpf->prog;
3675 struct nfp_net_dp *dp;
3676 int err;
3677
3678 if (!prog == !nn->dp.xdp_prog) {
3679 WRITE_ONCE(nn->dp.xdp_prog, prog);
3680 xdp_attachment_setup(&nn->xdp, bpf);
3681 return 0;
3682 }
3683
3684 dp = nfp_net_clone_dp(nn);
3685 if (!dp)
3686 return -ENOMEM;
3687
3688 dp->xdp_prog = prog;
3689 dp->num_tx_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings;
3690 dp->rx_dma_dir = prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE;
3691 dp->rx_dma_off = prog ? XDP_PACKET_HEADROOM - nn->dp.rx_offset : 0;
3692
3693
3694 err = nfp_net_ring_reconfig(nn, dp, bpf->extack);
3695 if (err)
3696 return err;
3697
3698 xdp_attachment_setup(&nn->xdp, bpf);
3699 return 0;
3700}
3701
3702static int nfp_net_xdp_setup_hw(struct nfp_net *nn, struct netdev_bpf *bpf)
3703{
3704 int err;
3705
3706 err = nfp_app_xdp_offload(nn->app, nn, bpf->prog, bpf->extack);
3707 if (err)
3708 return err;
3709
3710 xdp_attachment_setup(&nn->xdp_hw, bpf);
3711 return 0;
3712}
3713
3714static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp)
3715{
3716 struct nfp_net *nn = netdev_priv(netdev);
3717
3718 switch (xdp->command) {
3719 case XDP_SETUP_PROG:
3720 return nfp_net_xdp_setup_drv(nn, xdp);
3721 case XDP_SETUP_PROG_HW:
3722 return nfp_net_xdp_setup_hw(nn, xdp);
3723 default:
3724 return nfp_app_bpf(nn->app, nn, xdp);
3725 }
3726}
3727
3728static int nfp_net_set_mac_address(struct net_device *netdev, void *addr)
3729{
3730 struct nfp_net *nn = netdev_priv(netdev);
3731 struct sockaddr *saddr = addr;
3732 int err;
3733
3734 err = eth_prepare_mac_addr_change(netdev, addr);
3735 if (err)
3736 return err;
3737
3738 nfp_net_write_mac_addr(nn, saddr->sa_data);
3739
3740 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MACADDR);
3741 if (err)
3742 return err;
3743
3744 eth_commit_mac_addr_change(netdev, addr);
3745
3746 return 0;
3747}
3748
3749const struct net_device_ops nfp_net_netdev_ops = {
3750 .ndo_init = nfp_app_ndo_init,
3751 .ndo_uninit = nfp_app_ndo_uninit,
3752 .ndo_open = nfp_net_netdev_open,
3753 .ndo_stop = nfp_net_netdev_close,
3754 .ndo_start_xmit = nfp_net_tx,
3755 .ndo_get_stats64 = nfp_net_stat64,
3756 .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid,
3757 .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid,
3758 .ndo_set_vf_mac = nfp_app_set_vf_mac,
3759 .ndo_set_vf_vlan = nfp_app_set_vf_vlan,
3760 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
3761 .ndo_set_vf_trust = nfp_app_set_vf_trust,
3762 .ndo_get_vf_config = nfp_app_get_vf_config,
3763 .ndo_set_vf_link_state = nfp_app_set_vf_link_state,
3764 .ndo_setup_tc = nfp_port_setup_tc,
3765 .ndo_tx_timeout = nfp_net_tx_timeout,
3766 .ndo_set_rx_mode = nfp_net_set_rx_mode,
3767 .ndo_change_mtu = nfp_net_change_mtu,
3768 .ndo_set_mac_address = nfp_net_set_mac_address,
3769 .ndo_set_features = nfp_net_set_features,
3770 .ndo_features_check = nfp_net_features_check,
3771 .ndo_get_phys_port_name = nfp_net_get_phys_port_name,
3772 .ndo_bpf = nfp_net_xdp,
3773 .ndo_get_devlink_port = nfp_devlink_get_devlink_port,
3774};
3775
3776static int nfp_udp_tunnel_sync(struct net_device *netdev, unsigned int table)
3777{
3778 struct nfp_net *nn = netdev_priv(netdev);
3779 int i;
3780
3781 BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1);
3782 for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) {
3783 struct udp_tunnel_info ti0, ti1;
3784
3785 udp_tunnel_nic_get_port(netdev, table, i, &ti0);
3786 udp_tunnel_nic_get_port(netdev, table, i + 1, &ti1);
3787
3788 nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(ti0.port),
3789 be16_to_cpu(ti1.port) << 16 | be16_to_cpu(ti0.port));
3790 }
3791
3792 return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN);
3793}
3794
3795static const struct udp_tunnel_nic_info nfp_udp_tunnels = {
3796 .sync_table = nfp_udp_tunnel_sync,
3797 .flags = UDP_TUNNEL_NIC_INFO_MAY_SLEEP |
3798 UDP_TUNNEL_NIC_INFO_OPEN_ONLY,
3799 .tables = {
3800 {
3801 .n_entries = NFP_NET_N_VXLAN_PORTS,
3802 .tunnel_types = UDP_TUNNEL_TYPE_VXLAN,
3803 },
3804 },
3805};
3806
3807
3808
3809
3810
3811void nfp_net_info(struct nfp_net *nn)
3812{
3813 nn_info(nn, "Netronome NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n",
3814 nn->dp.is_vf ? "VF " : "",
3815 nn->dp.num_tx_rings, nn->max_tx_rings,
3816 nn->dp.num_rx_rings, nn->max_rx_rings);
3817 nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n",
3818 nn->fw_ver.resv, nn->fw_ver.class,
3819 nn->fw_ver.major, nn->fw_ver.minor,
3820 nn->max_mtu);
3821 nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
3822 nn->cap,
3823 nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "",
3824 nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "",
3825 nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "",
3826 nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "",
3827 nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "",
3828 nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "",
3829 nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "",
3830 nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "",
3831 nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "",
3832 nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO1 " : "",
3833 nn->cap & NFP_NET_CFG_CTRL_LSO2 ? "TSO2 " : "",
3834 nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS1 " : "",
3835 nn->cap & NFP_NET_CFG_CTRL_RSS2 ? "RSS2 " : "",
3836 nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER ? "CTAG_FILTER " : "",
3837 nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "",
3838 nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "",
3839 nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "",
3840 nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "",
3841 nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ?
3842 "RXCSUM_COMPLETE " : "",
3843 nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR ? "LIVE_ADDR " : "",
3844 nfp_app_extra_cap(nn->app, nn));
3845}
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861struct nfp_net *
3862nfp_net_alloc(struct pci_dev *pdev, void __iomem *ctrl_bar, bool needs_netdev,
3863 unsigned int max_tx_rings, unsigned int max_rx_rings)
3864{
3865 struct nfp_net *nn;
3866 int err;
3867
3868 if (needs_netdev) {
3869 struct net_device *netdev;
3870
3871 netdev = alloc_etherdev_mqs(sizeof(struct nfp_net),
3872 max_tx_rings, max_rx_rings);
3873 if (!netdev)
3874 return ERR_PTR(-ENOMEM);
3875
3876 SET_NETDEV_DEV(netdev, &pdev->dev);
3877 nn = netdev_priv(netdev);
3878 nn->dp.netdev = netdev;
3879 } else {
3880 nn = vzalloc(sizeof(*nn));
3881 if (!nn)
3882 return ERR_PTR(-ENOMEM);
3883 }
3884
3885 nn->dp.dev = &pdev->dev;
3886 nn->dp.ctrl_bar = ctrl_bar;
3887 nn->pdev = pdev;
3888
3889 nn->max_tx_rings = max_tx_rings;
3890 nn->max_rx_rings = max_rx_rings;
3891
3892 nn->dp.num_tx_rings = min_t(unsigned int,
3893 max_tx_rings, num_online_cpus());
3894 nn->dp.num_rx_rings = min_t(unsigned int, max_rx_rings,
3895 netif_get_num_default_rss_queues());
3896
3897 nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings);
3898 nn->dp.num_r_vecs = min_t(unsigned int,
3899 nn->dp.num_r_vecs, num_online_cpus());
3900
3901 nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT;
3902 nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT;
3903
3904 sema_init(&nn->bar_lock, 1);
3905
3906 spin_lock_init(&nn->reconfig_lock);
3907 spin_lock_init(&nn->link_status_lock);
3908
3909 timer_setup(&nn->reconfig_timer, nfp_net_reconfig_timer, 0);
3910
3911 err = nfp_net_tlv_caps_parse(&nn->pdev->dev, nn->dp.ctrl_bar,
3912 &nn->tlv_caps);
3913 if (err)
3914 goto err_free_nn;
3915
3916 err = nfp_ccm_mbox_alloc(nn);
3917 if (err)
3918 goto err_free_nn;
3919
3920 return nn;
3921
3922err_free_nn:
3923 if (nn->dp.netdev)
3924 free_netdev(nn->dp.netdev);
3925 else
3926 vfree(nn);
3927 return ERR_PTR(err);
3928}
3929
3930
3931
3932
3933
3934void nfp_net_free(struct nfp_net *nn)
3935{
3936 WARN_ON(timer_pending(&nn->reconfig_timer) || nn->reconfig_posted);
3937 nfp_ccm_mbox_free(nn);
3938
3939 if (nn->dp.netdev)
3940 free_netdev(nn->dp.netdev);
3941 else
3942 vfree(nn);
3943}
3944
3945
3946
3947
3948
3949
3950
3951unsigned int nfp_net_rss_key_sz(struct nfp_net *nn)
3952{
3953 switch (nn->rss_hfunc) {
3954 case ETH_RSS_HASH_TOP:
3955 return NFP_NET_CFG_RSS_KEY_SZ;
3956 case ETH_RSS_HASH_XOR:
3957 return 0;
3958 case ETH_RSS_HASH_CRC32:
3959 return 4;
3960 }
3961
3962 nn_warn(nn, "Unknown hash function: %u\n", nn->rss_hfunc);
3963 return 0;
3964}
3965
3966
3967
3968
3969
3970static void nfp_net_rss_init(struct nfp_net *nn)
3971{
3972 unsigned long func_bit, rss_cap_hfunc;
3973 u32 reg;
3974
3975
3976 reg = nn_readl(nn, NFP_NET_CFG_RSS_CAP);
3977 rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, reg);
3978 if (!rss_cap_hfunc)
3979 rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC,
3980 NFP_NET_CFG_RSS_TOEPLITZ);
3981
3982 func_bit = find_first_bit(&rss_cap_hfunc, NFP_NET_CFG_RSS_HFUNCS);
3983 if (func_bit == NFP_NET_CFG_RSS_HFUNCS) {
3984 dev_warn(nn->dp.dev,
3985 "Bad RSS config, defaulting to Toeplitz hash\n");
3986 func_bit = ETH_RSS_HASH_TOP_BIT;
3987 }
3988 nn->rss_hfunc = 1 << func_bit;
3989
3990 netdev_rss_key_fill(nn->rss_key, nfp_net_rss_key_sz(nn));
3991
3992 nfp_net_rss_init_itbl(nn);
3993
3994
3995 nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP |
3996 NFP_NET_CFG_RSS_IPV6_TCP |
3997 FIELD_PREP(NFP_NET_CFG_RSS_HFUNC, nn->rss_hfunc) |
3998 NFP_NET_CFG_RSS_MASK;
3999}
4000
4001
4002
4003
4004
4005static void nfp_net_irqmod_init(struct nfp_net *nn)
4006{
4007 nn->rx_coalesce_usecs = 50;
4008 nn->rx_coalesce_max_frames = 64;
4009 nn->tx_coalesce_usecs = 50;
4010 nn->tx_coalesce_max_frames = 64;
4011
4012 nn->rx_coalesce_adapt_on = true;
4013 nn->tx_coalesce_adapt_on = true;
4014}
4015
4016static void nfp_net_netdev_init(struct nfp_net *nn)
4017{
4018 struct net_device *netdev = nn->dp.netdev;
4019
4020 nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr);
4021
4022 netdev->mtu = nn->dp.mtu;
4023
4024
4025
4026
4027
4028
4029
4030 if (nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR)
4031 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
4032
4033 netdev->hw_features = NETIF_F_HIGHDMA;
4034 if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) {
4035 netdev->hw_features |= NETIF_F_RXCSUM;
4036 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
4037 }
4038 if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) {
4039 netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
4040 nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
4041 }
4042 if (nn->cap & NFP_NET_CFG_CTRL_GATHER) {
4043 netdev->hw_features |= NETIF_F_SG;
4044 nn->dp.ctrl |= NFP_NET_CFG_CTRL_GATHER;
4045 }
4046 if ((nn->cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) ||
4047 nn->cap & NFP_NET_CFG_CTRL_LSO2) {
4048 netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
4049 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
4050 NFP_NET_CFG_CTRL_LSO;
4051 }
4052 if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY)
4053 netdev->hw_features |= NETIF_F_RXHASH;
4054 if (nn->cap & NFP_NET_CFG_CTRL_VXLAN) {
4055 if (nn->cap & NFP_NET_CFG_CTRL_LSO)
4056 netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL;
4057 netdev->udp_tunnel_nic_info = &nfp_udp_tunnels;
4058 nn->dp.ctrl |= NFP_NET_CFG_CTRL_VXLAN;
4059 }
4060 if (nn->cap & NFP_NET_CFG_CTRL_NVGRE) {
4061 if (nn->cap & NFP_NET_CFG_CTRL_LSO)
4062 netdev->hw_features |= NETIF_F_GSO_GRE;
4063 nn->dp.ctrl |= NFP_NET_CFG_CTRL_NVGRE;
4064 }
4065 if (nn->cap & (NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE))
4066 netdev->hw_enc_features = netdev->hw_features;
4067
4068 netdev->vlan_features = netdev->hw_features;
4069
4070 if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) {
4071 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
4072 nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXVLAN;
4073 }
4074 if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) {
4075 if (nn->cap & NFP_NET_CFG_CTRL_LSO2) {
4076 nn_warn(nn, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n");
4077 } else {
4078 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
4079 nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXVLAN;
4080 }
4081 }
4082 if (nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER) {
4083 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
4084 nn->dp.ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
4085 }
4086
4087 netdev->features = netdev->hw_features;
4088
4089 if (nfp_app_has_tc(nn->app) && nn->port)
4090 netdev->hw_features |= NETIF_F_HW_TC;
4091
4092
4093 netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
4094 nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY;
4095
4096
4097 netdev->netdev_ops = &nfp_net_netdev_ops;
4098 netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000);
4099
4100
4101 netdev->min_mtu = ETH_MIN_MTU;
4102 netdev->max_mtu = nn->max_mtu;
4103
4104 netdev->gso_max_segs = NFP_NET_LSO_MAX_SEGS;
4105
4106 netif_carrier_off(netdev);
4107
4108 nfp_net_set_ethtool_ops(netdev);
4109}
4110
4111static int nfp_net_read_caps(struct nfp_net *nn)
4112{
4113
4114 nn->cap = nn_readl(nn, NFP_NET_CFG_CAP);
4115 nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU);
4116
4117
4118
4119
4120
4121 nn->dp.chained_metadata_format = nn->fw_ver.major == 4 ||
4122 !nn->dp.netdev ||
4123 !(nn->cap & NFP_NET_CFG_CTRL_RSS) ||
4124 nn->cap & NFP_NET_CFG_CTRL_CHAIN_META;
4125
4126
4127
4128 if (nn->dp.chained_metadata_format && nn->fw_ver.major != 4)
4129 nn->cap &= ~NFP_NET_CFG_CTRL_RSS;
4130
4131
4132 if (nn->fw_ver.major >= 2) {
4133 u32 reg;
4134
4135 reg = nn_readl(nn, NFP_NET_CFG_RX_OFFSET);
4136 if (reg > NFP_NET_MAX_PREPEND) {
4137 nn_err(nn, "Invalid rx offset: %d\n", reg);
4138 return -EINVAL;
4139 }
4140 nn->dp.rx_offset = reg;
4141 } else {
4142 nn->dp.rx_offset = NFP_NET_RX_OFFSET;
4143 }
4144
4145
4146 if (!nn->dp.netdev)
4147 nn->cap &= nn->app->type->ctrl_cap_mask;
4148
4149 return 0;
4150}
4151
4152
4153
4154
4155
4156
4157
4158int nfp_net_init(struct nfp_net *nn)
4159{
4160 int err;
4161
4162 nn->dp.rx_dma_dir = DMA_FROM_DEVICE;
4163
4164 err = nfp_net_read_caps(nn);
4165 if (err)
4166 return err;
4167
4168
4169 if (!nfp_net_is_data_vnic(nn) && nn->app->ctrl_mtu) {
4170 nn->dp.mtu = min(nn->app->ctrl_mtu, nn->max_mtu);
4171 } else if (nn->max_mtu < NFP_NET_DEFAULT_MTU) {
4172 nn->dp.mtu = nn->max_mtu;
4173 } else {
4174 nn->dp.mtu = NFP_NET_DEFAULT_MTU;
4175 }
4176 nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp);
4177
4178 if (nfp_app_ctrl_uses_data_vnics(nn->app))
4179 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_CMSG_DATA;
4180
4181 if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) {
4182 nfp_net_rss_init(nn);
4183 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RSS2 ?:
4184 NFP_NET_CFG_CTRL_RSS;
4185 }
4186
4187
4188 if (nn->cap & NFP_NET_CFG_CTRL_L2BC)
4189 nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2BC;
4190
4191
4192 if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) {
4193 nfp_net_irqmod_init(nn);
4194 nn->dp.ctrl |= NFP_NET_CFG_CTRL_IRQMOD;
4195 }
4196
4197
4198 nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ;
4199
4200
4201 nn_writel(nn, NFP_NET_CFG_CTRL, 0);
4202 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
4203 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
4204 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING |
4205 NFP_NET_CFG_UPDATE_GEN);
4206 if (err)
4207 return err;
4208
4209 if (nn->dp.netdev) {
4210 nfp_net_netdev_init(nn);
4211
4212 err = nfp_ccm_mbox_init(nn);
4213 if (err)
4214 return err;
4215
4216 err = nfp_net_tls_init(nn);
4217 if (err)
4218 goto err_clean_mbox;
4219 }
4220
4221 nfp_net_vecs_init(nn);
4222
4223 if (!nn->dp.netdev)
4224 return 0;
4225 return register_netdev(nn->dp.netdev);
4226
4227err_clean_mbox:
4228 nfp_ccm_mbox_clean(nn);
4229 return err;
4230}
4231
4232
4233
4234
4235
4236void nfp_net_clean(struct nfp_net *nn)
4237{
4238 if (!nn->dp.netdev)
4239 return;
4240
4241 unregister_netdev(nn->dp.netdev);
4242 nfp_ccm_mbox_clean(nn);
4243 nfp_net_reconfig_wait_posted(nn);
4244}
4245