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42#ifndef _NFP_NET_H_
43#define _NFP_NET_H_
44
45#include <linux/interrupt.h>
46#include <linux/list.h>
47#include <linux/netdevice.h>
48#include <linux/pci.h>
49#include <linux/io-64-nonatomic-hi-lo.h>
50
51#include "nfp_net_ctrl.h"
52
53#define nn_pr(nn, lvl, fmt, args...) \
54 ({ \
55 struct nfp_net *__nn = (nn); \
56 \
57 if (__nn->dp.netdev) \
58 netdev_printk(lvl, __nn->dp.netdev, fmt, ## args); \
59 else \
60 dev_printk(lvl, __nn->dp.dev, "ctrl: " fmt, ## args); \
61 })
62
63#define nn_err(nn, fmt, args...) nn_pr(nn, KERN_ERR, fmt, ## args)
64#define nn_warn(nn, fmt, args...) nn_pr(nn, KERN_WARNING, fmt, ## args)
65#define nn_info(nn, fmt, args...) nn_pr(nn, KERN_INFO, fmt, ## args)
66#define nn_dbg(nn, fmt, args...) nn_pr(nn, KERN_DEBUG, fmt, ## args)
67
68#define nn_dp_warn(dp, fmt, args...) \
69 ({ \
70 struct nfp_net_dp *__dp = (dp); \
71 \
72 if (unlikely(net_ratelimit())) { \
73 if (__dp->netdev) \
74 netdev_warn(__dp->netdev, fmt, ## args); \
75 else \
76 dev_warn(__dp->dev, fmt, ## args); \
77 } \
78 })
79
80
81#define NFP_NET_POLL_TIMEOUT 5
82
83
84#define NFP_NET_STAT_POLL_IVL msecs_to_jiffies(100)
85
86
87#define NFP_NET_CTRL_BAR 0
88#define NFP_NET_Q0_BAR 2
89#define NFP_NET_Q1_BAR 4
90
91
92#define NFP_NET_MAX_DMA_BITS 40
93
94
95#define NFP_NET_DEFAULT_MTU 1500
96
97
98#define NFP_NET_MAX_PREPEND 64
99
100
101#define NFP_NET_NON_Q_VECTORS 2
102#define NFP_NET_IRQ_LSC_IDX 0
103#define NFP_NET_IRQ_EXN_IDX 1
104#define NFP_NET_MIN_VNIC_IRQS (NFP_NET_NON_Q_VECTORS + 1)
105
106
107#define NFP_NET_MAX_TX_RINGS 64
108#define NFP_NET_MAX_RX_RINGS 64
109#define NFP_NET_MAX_R_VECS (NFP_NET_MAX_TX_RINGS > NFP_NET_MAX_RX_RINGS ? \
110 NFP_NET_MAX_TX_RINGS : NFP_NET_MAX_RX_RINGS)
111#define NFP_NET_MAX_IRQS (NFP_NET_NON_Q_VECTORS + NFP_NET_MAX_R_VECS)
112
113#define NFP_NET_MIN_TX_DESCS 256
114#define NFP_NET_MIN_RX_DESCS 256
115#define NFP_NET_MAX_TX_DESCS (256 * 1024)
116#define NFP_NET_MAX_RX_DESCS (256 * 1024)
117
118#define NFP_NET_TX_DESCS_DEFAULT 4096
119#define NFP_NET_RX_DESCS_DEFAULT 4096
120
121#define NFP_NET_FL_BATCH 16
122#define NFP_NET_XDP_MAX_COMPLETE 2048
123
124
125#define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16))
126
127#define NFP_NET_RX_BUF_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN)
128#define NFP_NET_RX_BUF_NON_DATA (NFP_NET_RX_BUF_HEADROOM + \
129 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
130
131
132struct nfp_cpp;
133struct nfp_eth_table_port;
134struct nfp_net;
135struct nfp_net_r_vector;
136struct nfp_port;
137
138
139#define D_IDX(ring, idx) ((idx) & ((ring)->cnt - 1))
140
141
142#define nfp_desc_set_dma_addr(desc, dma_addr) \
143 do { \
144 __typeof(desc) __d = (desc); \
145 dma_addr_t __addr = (dma_addr); \
146 \
147 __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \
148 __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \
149 } while (0)
150
151
152
153#define PCIE_DESC_TX_EOP BIT(7)
154#define PCIE_DESC_TX_OFFSET_MASK GENMASK(6, 0)
155#define PCIE_DESC_TX_MSS_MASK GENMASK(13, 0)
156
157
158#define PCIE_DESC_TX_CSUM BIT(7)
159#define PCIE_DESC_TX_IP4_CSUM BIT(6)
160#define PCIE_DESC_TX_TCP_CSUM BIT(5)
161#define PCIE_DESC_TX_UDP_CSUM BIT(4)
162#define PCIE_DESC_TX_VLAN BIT(3)
163#define PCIE_DESC_TX_LSO BIT(2)
164#define PCIE_DESC_TX_ENCAP BIT(1)
165#define PCIE_DESC_TX_O_IP4_CSUM BIT(0)
166
167struct nfp_net_tx_desc {
168 union {
169 struct {
170 u8 dma_addr_hi;
171 __le16 dma_len;
172 u8 offset_eop;
173
174
175 __le32 dma_addr_lo;
176
177 __le16 mss;
178 u8 lso_hdrlen;
179 u8 flags;
180 union {
181 struct {
182 u8 l3_offset;
183 u8 l4_offset;
184 };
185 __le16 vlan;
186 };
187 __le16 data_len;
188 } __packed;
189 __le32 vals[4];
190 };
191};
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204struct nfp_net_tx_buf {
205 union {
206 struct sk_buff *skb;
207 void *frag;
208 };
209 dma_addr_t dma_addr;
210 short int fidx;
211 u16 pkt_cnt;
212 u32 real_len;
213};
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232
233struct nfp_net_tx_ring {
234 struct nfp_net_r_vector *r_vec;
235
236 u32 idx;
237 int qcidx;
238 u8 __iomem *qcp_q;
239
240 u32 cnt;
241 u32 wr_p;
242 u32 rd_p;
243 u32 qcp_rd_p;
244
245 u32 wr_ptr_add;
246
247 struct nfp_net_tx_buf *txbufs;
248 struct nfp_net_tx_desc *txds;
249
250 dma_addr_t dma;
251 unsigned int size;
252 bool is_xdp;
253} ____cacheline_aligned;
254
255
256
257#define PCIE_DESC_RX_DD BIT(7)
258#define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0)
259
260
261#define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15))
262#define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14))
263#define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13))
264#define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12))
265#define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11))
266#define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10))
267#define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9))
268#define PCIE_DESC_RX_BPF cpu_to_le16(BIT(8))
269#define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7))
270#define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6))
271#define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5))
272#define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4))
273#define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3))
274#define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2))
275#define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1))
276#define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0))
277
278#define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \
279 PCIE_DESC_RX_TCP_CSUM | \
280 PCIE_DESC_RX_UDP_CSUM | \
281 PCIE_DESC_RX_I_IP4_CSUM | \
282 PCIE_DESC_RX_I_TCP_CSUM | \
283 PCIE_DESC_RX_I_UDP_CSUM)
284#define PCIE_DESC_RX_CSUM_OK_SHIFT 1
285#define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL)
286#define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \
287 PCIE_DESC_RX_CSUM_OK_SHIFT)
288
289struct nfp_net_rx_desc {
290 union {
291 struct {
292 u8 dma_addr_hi;
293 __le16 reserved;
294 u8 meta_len_dd;
295
296 __le32 dma_addr_lo;
297 } __packed fld;
298
299 struct {
300 __le16 data_len;
301 u8 reserved;
302 u8 meta_len_dd;
303
304
305
306 __le16 flags;
307 __le16 vlan;
308 } __packed rxd;
309
310 __le32 vals[2];
311 };
312};
313
314#define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0)
315
316struct nfp_meta_parsed {
317 u8 hash_type;
318 u8 csum_type;
319 u32 hash;
320 u32 mark;
321 u32 portid;
322 __wsum csum;
323};
324
325struct nfp_net_rx_hash {
326 __be32 hash_type;
327 __be32 hash;
328};
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335struct nfp_net_rx_buf {
336 void *frag;
337 dma_addr_t dma_addr;
338};
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354struct nfp_net_rx_ring {
355 struct nfp_net_r_vector *r_vec;
356
357 u32 cnt;
358 u32 wr_p;
359 u32 rd_p;
360
361 u32 idx;
362
363 int fl_qcidx;
364 u8 __iomem *qcp_fl;
365
366 struct nfp_net_rx_buf *rxbufs;
367 struct nfp_net_rx_desc *rxds;
368
369 dma_addr_t dma;
370 unsigned int size;
371} ____cacheline_aligned;
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408struct nfp_net_r_vector {
409 struct nfp_net *nfp_net;
410 union {
411 struct napi_struct napi;
412 struct {
413 struct tasklet_struct tasklet;
414 struct sk_buff_head queue;
415 struct spinlock lock;
416 };
417 };
418
419 struct nfp_net_tx_ring *tx_ring;
420 struct nfp_net_rx_ring *rx_ring;
421
422 u16 irq_entry;
423
424 struct u64_stats_sync rx_sync;
425 u64 rx_pkts;
426 u64 rx_bytes;
427 u64 rx_drops;
428 u64 hw_csum_rx_ok;
429 u64 hw_csum_rx_inner_ok;
430 u64 hw_csum_rx_error;
431
432 struct nfp_net_tx_ring *xdp_ring;
433
434 struct u64_stats_sync tx_sync;
435 u64 tx_pkts;
436 u64 tx_bytes;
437 u64 hw_csum_tx;
438 u64 hw_csum_tx_inner;
439 u64 tx_gather;
440 u64 tx_lso;
441
442 u64 rx_replace_buf_alloc_fail;
443 u64 tx_errors;
444 u64 tx_busy;
445
446 u32 irq_vector;
447 irq_handler_t handler;
448 char name[IFNAMSIZ + 8];
449 cpumask_t affinity_mask;
450} ____cacheline_aligned;
451
452
453struct nfp_net_fw_version {
454 u8 minor;
455 u8 major;
456 u8 class;
457 u8 resv;
458} __packed;
459
460static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver,
461 u8 resv, u8 class, u8 major, u8 minor)
462{
463 return fw_ver->resv == resv &&
464 fw_ver->class == class &&
465 fw_ver->major == major &&
466 fw_ver->minor == minor;
467}
468
469struct nfp_stat_pair {
470 u64 pkts;
471 u64 bytes;
472};
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499struct nfp_net_dp {
500 struct device *dev;
501 struct net_device *netdev;
502
503 u8 is_vf:1;
504 u8 bpf_offload_xdp:1;
505 u8 chained_metadata_format:1;
506
507 u8 rx_dma_dir;
508 u8 rx_offset;
509
510 u32 rx_dma_off;
511
512 u32 ctrl;
513 u32 fl_bufsz;
514
515 struct bpf_prog *xdp_prog;
516
517 struct nfp_net_tx_ring *tx_rings;
518 struct nfp_net_rx_ring *rx_rings;
519
520 u8 __iomem *ctrl_bar;
521
522
523
524 unsigned int txd_cnt;
525 unsigned int rxd_cnt;
526
527 unsigned int num_r_vecs;
528
529 unsigned int num_tx_rings;
530 unsigned int num_stack_tx_rings;
531 unsigned int num_rx_rings;
532
533 unsigned int mtu;
534};
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583struct nfp_net {
584 struct nfp_net_dp dp;
585
586 struct nfp_net_fw_version fw_ver;
587
588 u32 cap;
589 u32 max_mtu;
590
591 u8 rss_hfunc;
592 u32 rss_cfg;
593 u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ];
594 u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ];
595
596 u32 xdp_flags;
597 struct bpf_prog *xdp_prog;
598
599 unsigned int max_tx_rings;
600 unsigned int max_rx_rings;
601
602 int stride_tx;
603 int stride_rx;
604
605 unsigned int max_r_vecs;
606 struct nfp_net_r_vector r_vecs[NFP_NET_MAX_R_VECS];
607 struct msix_entry irq_entries[NFP_NET_MAX_IRQS];
608
609 irq_handler_t lsc_handler;
610 char lsc_name[IFNAMSIZ + 8];
611
612 irq_handler_t exn_handler;
613 char exn_name[IFNAMSIZ + 8];
614
615 irq_handler_t shared_handler;
616 char shared_name[IFNAMSIZ + 8];
617
618 u32 me_freq_mhz;
619
620 bool link_up;
621 spinlock_t link_status_lock;
622
623 spinlock_t reconfig_lock;
624 u32 reconfig_posted;
625 bool reconfig_timer_active;
626 bool reconfig_sync_present;
627 struct timer_list reconfig_timer;
628
629 u32 rx_coalesce_usecs;
630 u32 rx_coalesce_max_frames;
631 u32 tx_coalesce_usecs;
632 u32 tx_coalesce_max_frames;
633
634 __be16 vxlan_ports[NFP_NET_N_VXLAN_PORTS];
635 u8 vxlan_usecnt[NFP_NET_N_VXLAN_PORTS];
636
637 u8 __iomem *qcp_cfg;
638
639 u8 __iomem *tx_bar;
640 u8 __iomem *rx_bar;
641
642 struct dentry *debugfs_dir;
643
644 struct list_head vnic_list;
645
646 struct pci_dev *pdev;
647 struct nfp_app *app;
648
649 struct nfp_port *port;
650
651 void *app_priv;
652};
653
654
655
656
657static inline u16 nn_readb(struct nfp_net *nn, int off)
658{
659 return readb(nn->dp.ctrl_bar + off);
660}
661
662static inline void nn_writeb(struct nfp_net *nn, int off, u8 val)
663{
664 writeb(val, nn->dp.ctrl_bar + off);
665}
666
667static inline u16 nn_readw(struct nfp_net *nn, int off)
668{
669 return readw(nn->dp.ctrl_bar + off);
670}
671
672static inline void nn_writew(struct nfp_net *nn, int off, u16 val)
673{
674 writew(val, nn->dp.ctrl_bar + off);
675}
676
677static inline u32 nn_readl(struct nfp_net *nn, int off)
678{
679 return readl(nn->dp.ctrl_bar + off);
680}
681
682static inline void nn_writel(struct nfp_net *nn, int off, u32 val)
683{
684 writel(val, nn->dp.ctrl_bar + off);
685}
686
687static inline u64 nn_readq(struct nfp_net *nn, int off)
688{
689 return readq(nn->dp.ctrl_bar + off);
690}
691
692static inline void nn_writeq(struct nfp_net *nn, int off, u64 val)
693{
694 writeq(val, nn->dp.ctrl_bar + off);
695}
696
697
698static inline void nn_pci_flush(struct nfp_net *nn)
699{
700 nn_readl(nn, NFP_NET_CFG_VERSION);
701}
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711
712#define NFP_QCP_QUEUE_ADDR_SZ 0x800
713#define NFP_QCP_QUEUE_AREA_SZ 0x80000
714#define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ)
715#define NFP_QCP_QUEUE_ADD_RPTR 0x0000
716#define NFP_QCP_QUEUE_ADD_WPTR 0x0004
717#define NFP_QCP_QUEUE_STS_LO 0x0008
718#define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff
719#define NFP_QCP_QUEUE_STS_HI 0x000c
720#define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff
721
722
723#define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff)))
724
725
726enum nfp_qcp_ptr {
727 NFP_QCP_READ_PTR = 0,
728 NFP_QCP_WRITE_PTR
729};
730
731
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733
734
735#define NFP_QCP_MAX_ADD 0x3f
736
737static inline void _nfp_qcp_ptr_add(u8 __iomem *q,
738 enum nfp_qcp_ptr ptr, u32 val)
739{
740 u32 off;
741
742 if (ptr == NFP_QCP_READ_PTR)
743 off = NFP_QCP_QUEUE_ADD_RPTR;
744 else
745 off = NFP_QCP_QUEUE_ADD_WPTR;
746
747 while (val > NFP_QCP_MAX_ADD) {
748 writel(NFP_QCP_MAX_ADD, q + off);
749 val -= NFP_QCP_MAX_ADD;
750 }
751
752 writel(val, q + off);
753}
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763static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val)
764{
765 _nfp_qcp_ptr_add(q, NFP_QCP_READ_PTR, val);
766}
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776static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val)
777{
778 _nfp_qcp_ptr_add(q, NFP_QCP_WRITE_PTR, val);
779}
780
781static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr)
782{
783 u32 off;
784 u32 val;
785
786 if (ptr == NFP_QCP_READ_PTR)
787 off = NFP_QCP_QUEUE_STS_LO;
788 else
789 off = NFP_QCP_QUEUE_STS_HI;
790
791 val = readl(q + off);
792
793 if (ptr == NFP_QCP_READ_PTR)
794 return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask;
795 else
796 return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask;
797}
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804
805static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q)
806{
807 return _nfp_qcp_read(q, NFP_QCP_READ_PTR);
808}
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815
816static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q)
817{
818 return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR);
819}
820
821static inline bool nfp_net_is_data_vnic(struct nfp_net *nn)
822{
823 WARN_ON_ONCE(!nn->dp.netdev && nn->port);
824 return !!nn->dp.netdev;
825}
826
827static inline bool nfp_net_running(struct nfp_net *nn)
828{
829 return nn->dp.ctrl & NFP_NET_CFG_CTRL_ENABLE;
830}
831
832static inline const char *nfp_net_name(struct nfp_net *nn)
833{
834 return nn->dp.netdev ? nn->dp.netdev->name : "ctrl";
835}
836
837
838extern const char nfp_driver_version[];
839
840extern const struct net_device_ops nfp_net_netdev_ops;
841
842static inline bool nfp_netdev_is_nfp_net(struct net_device *netdev)
843{
844 return netdev->netdev_ops == &nfp_net_netdev_ops;
845}
846
847
848void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver,
849 void __iomem *ctrl_bar);
850
851struct nfp_net *
852nfp_net_alloc(struct pci_dev *pdev, bool needs_netdev,
853 unsigned int max_tx_rings, unsigned int max_rx_rings);
854void nfp_net_free(struct nfp_net *nn);
855
856int nfp_net_init(struct nfp_net *nn);
857void nfp_net_clean(struct nfp_net *nn);
858
859int nfp_ctrl_open(struct nfp_net *nn);
860void nfp_ctrl_close(struct nfp_net *nn);
861
862void nfp_net_set_ethtool_ops(struct net_device *netdev);
863void nfp_net_info(struct nfp_net *nn);
864int nfp_net_reconfig(struct nfp_net *nn, u32 update);
865unsigned int nfp_net_rss_key_sz(struct nfp_net *nn);
866void nfp_net_rss_write_itbl(struct nfp_net *nn);
867void nfp_net_rss_write_key(struct nfp_net *nn);
868void nfp_net_coalesce_write_cfg(struct nfp_net *nn);
869
870unsigned int
871nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries,
872 unsigned int min_irqs, unsigned int want_irqs);
873void nfp_net_irqs_disable(struct pci_dev *pdev);
874void
875nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries,
876 unsigned int n);
877
878struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn);
879int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *new,
880 struct netlink_ext_ack *extack);
881
882#ifdef CONFIG_NFP_DEBUG
883void nfp_net_debugfs_create(void);
884void nfp_net_debugfs_destroy(void);
885struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev);
886void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir, int id);
887void nfp_net_debugfs_dir_clean(struct dentry **dir);
888#else
889static inline void nfp_net_debugfs_create(void)
890{
891}
892
893static inline void nfp_net_debugfs_destroy(void)
894{
895}
896
897static inline struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev)
898{
899 return NULL;
900}
901
902static inline void
903nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir, int id)
904{
905}
906
907static inline void nfp_net_debugfs_dir_clean(struct dentry **dir)
908{
909}
910#endif
911
912#endif
913