1 /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
2 /* Copyright 2017-2019 NXP */
4 #include <linux/timer.h>
6 #include <linux/netdevice.h>
7 #include <linux/etherdevice.h>
8 #include <linux/dma-mapping.h>
9 #include <linux/skbuff.h>
10 #include <linux/ethtool.h>
11 #include <linux/if_vlan.h>
12 #include <linux/phylink.h>
13 #include <linux/dim.h>
17 #define ENETC_MAC_MAXFRM_SIZE 9600
18 #define ENETC_MAX_MTU (ENETC_MAC_MAXFRM_SIZE - \
19 (ETH_FCS_LEN + ETH_HLEN + VLAN_HLEN))
21 #define ENETC_CBD_DATA_MEM_ALIGN 64
23 struct enetc_tx_swbd {
26 struct xdp_frame *xdp_frame;
29 struct page *page; /* valid only if is_xdp_tx */
30 u16 page_offset; /* valid only if is_xdp_tx */
32 enum dma_data_direction dir;
35 u8 do_twostep_tstamp:1;
42 #define ENETC_RX_MAXFRM_SIZE ENETC_MAC_MAXFRM_SIZE
43 #define ENETC_RXB_TRUESIZE 2048 /* PAGE_SIZE >> 1 */
44 #define ENETC_RXB_PAD NET_SKB_PAD /* add extra space if needed */
45 #define ENETC_RXB_DMA_SIZE \
46 (SKB_WITH_OVERHEAD(ENETC_RXB_TRUESIZE) - ENETC_RXB_PAD)
47 #define ENETC_RXB_DMA_SIZE_XDP \
48 (SKB_WITH_OVERHEAD(ENETC_RXB_TRUESIZE) - XDP_PACKET_HEADROOM)
50 struct enetc_rx_swbd {
54 enum dma_data_direction dir;
58 /* ENETC overhead: optional extension BD + 1 BD gap */
59 #define ENETC_TXBDS_NEEDED(val) ((val) + 2)
60 /* max # of chained Tx BDs is 15, including head and extension BD */
61 #define ENETC_MAX_SKB_FRAGS 13
62 #define ENETC_TXBDS_MAX_NEEDED ENETC_TXBDS_NEEDED(ENETC_MAX_SKB_FRAGS + 1)
64 struct enetc_ring_stats {
67 unsigned int rx_alloc_errs;
68 unsigned int xdp_drops;
70 unsigned int xdp_tx_drops;
71 unsigned int xdp_redirect;
72 unsigned int xdp_redirect_failures;
73 unsigned int xdp_redirect_sg;
74 unsigned int recycles;
75 unsigned int recycle_failures;
76 unsigned int win_drop;
79 struct enetc_xdp_data {
80 struct xdp_rxq_info rxq;
81 struct bpf_prog *prog;
85 #define ENETC_RX_RING_DEFAULT_SIZE 2048
86 #define ENETC_TX_RING_DEFAULT_SIZE 2048
87 #define ENETC_DEFAULT_TX_WORK (ENETC_TX_RING_DEFAULT_SIZE / 2)
90 struct device *dev; /* for DMA mapping */
91 struct net_device *ndev;
92 void *bd_base; /* points to Rx or Tx BD ring */
98 int bd_count; /* # of BDs */
102 struct enetc_tx_swbd *tx_swbd;
103 struct enetc_rx_swbd *rx_swbd;
106 void __iomem *tcir; /* Tx */
107 int next_to_alloc; /* Rx */
109 void __iomem *idr; /* Interrupt Detect Register pointer */
112 struct enetc_xdp_data xdp;
114 struct enetc_ring_stats stats;
116 dma_addr_t bd_dma_base;
117 u8 tsd_enable; /* Time specific departure */
118 bool ext_en; /* enable h/w descriptor extensions */
120 /* DMA buffer for TSO headers */
122 dma_addr_t tso_headers_dma;
123 } ____cacheline_aligned_in_smp;
125 static inline void enetc_bdr_idx_inc(struct enetc_bdr *bdr, int *i)
127 if (unlikely(++*i == bdr->bd_count))
131 static inline int enetc_bd_unused(struct enetc_bdr *bdr)
133 if (bdr->next_to_clean > bdr->next_to_use)
134 return bdr->next_to_clean - bdr->next_to_use - 1;
136 return bdr->bd_count + bdr->next_to_clean - bdr->next_to_use - 1;
139 static inline int enetc_swbd_unused(struct enetc_bdr *bdr)
141 if (bdr->next_to_clean > bdr->next_to_alloc)
142 return bdr->next_to_clean - bdr->next_to_alloc - 1;
144 return bdr->bd_count + bdr->next_to_clean - bdr->next_to_alloc - 1;
147 /* Control BD ring */
148 #define ENETC_CBDR_DEFAULT_SIZE 64
150 void *bd_base; /* points to Rx or Tx BD ring */
153 void __iomem *mr; /* mode register */
155 int bd_count; /* # of BDs */
159 dma_addr_t bd_dma_base;
160 struct device *dma_dev;
163 #define ENETC_TXBD(BDR, i) (&(((union enetc_tx_bd *)((BDR).bd_base))[i]))
165 static inline union enetc_rx_bd *enetc_rxbd(struct enetc_bdr *rx_ring, int i)
169 #ifdef CONFIG_FSL_ENETC_PTP_CLOCK
173 return &(((union enetc_rx_bd *)rx_ring->bd_base)[hw_idx]);
176 static inline void enetc_rxbd_next(struct enetc_bdr *rx_ring,
177 union enetc_rx_bd **old_rxbd, int *old_index)
179 union enetc_rx_bd *new_rxbd = *old_rxbd;
180 int new_index = *old_index;
184 #ifdef CONFIG_FSL_ENETC_PTP_CLOCK
189 if (unlikely(++new_index == rx_ring->bd_count)) {
190 new_rxbd = rx_ring->bd_base;
194 *old_rxbd = new_rxbd;
195 *old_index = new_index;
198 static inline union enetc_rx_bd *enetc_rxbd_ext(union enetc_rx_bd *rxbd)
203 struct enetc_msg_swbd {
209 #define ENETC_REV1 0x1
211 ENETC_ERR_VLAN_ISOL = BIT(0),
212 ENETC_ERR_UCMCSWP = BIT(1),
215 #define ENETC_SI_F_QBV BIT(0)
216 #define ENETC_SI_F_PSFP BIT(1)
218 /* PCI IEP device data */
220 struct pci_dev *pdev;
222 enum enetc_errata errata;
224 struct net_device *ndev; /* back ref. */
226 struct enetc_cbdr cbd_ring;
228 int num_rx_rings; /* how many rings are available in the SI */
231 int num_rss; /* number of RSS buckets */
236 #define ENETC_SI_ALIGN 32
238 static inline void *enetc_si_priv(const struct enetc_si *si)
240 return (char *)si + ALIGN(sizeof(struct enetc_si), ENETC_SI_ALIGN);
243 static inline bool enetc_si_is_pf(struct enetc_si *si)
245 return !!(si->hw.port);
248 static inline int enetc_pf_to_port(struct pci_dev *pf_pdev)
250 switch (pf_pdev->devfn) {
264 #define ENETC_MAX_NUM_TXQS 8
265 #define ENETC_INT_NAME_MAX (IFNAMSIZ + 8)
267 struct enetc_int_vector {
269 void __iomem *tbier_base;
271 unsigned long tx_rings_map;
275 bool rx_dim_en, rx_napi_work;
276 struct napi_struct napi ____cacheline_aligned_in_smp;
277 struct dim rx_dim ____cacheline_aligned_in_smp;
278 char name[ENETC_INT_NAME_MAX];
280 struct enetc_bdr rx_ring;
281 struct enetc_bdr tx_ring[];
282 } ____cacheline_aligned_in_smp;
284 struct enetc_cls_rule {
285 struct ethtool_rx_flow_spec fs;
289 #define ENETC_MAX_BDR_INT 2 /* fixed to max # of available cpus */
294 u32 max_psfp_gatelist;
298 #define ENETC_F_TX_TSTAMP_MASK 0xff
299 /* TODO: more hardware offloads */
300 enum enetc_active_offloads {
301 /* 8 bits reserved for TX timestamp types (hwtstamp_tx_types) */
302 ENETC_F_TX_TSTAMP = BIT(0),
303 ENETC_F_TX_ONESTEP_SYNC_TSTAMP = BIT(1),
305 ENETC_F_RX_TSTAMP = BIT(8),
306 ENETC_F_QBV = BIT(9),
307 ENETC_F_QCI = BIT(10),
310 enum enetc_flags_bit {
311 ENETC_TX_ONESTEP_TSTAMP_IN_PROGRESS = 0,
314 /* interrupt coalescing modes */
316 /* one interrupt per frame */
318 /* activated when int coalescing time is set to a non-0 value */
319 ENETC_IC_RX_MANUAL = BIT(0),
320 ENETC_IC_TX_MANUAL = BIT(1),
321 /* use dynamic interrupt moderation */
322 ENETC_IC_RX_ADAPTIVE = BIT(2),
325 #define ENETC_RXIC_PKTTHR min_t(u32, 256, ENETC_RX_RING_DEFAULT_SIZE / 2)
326 #define ENETC_TXIC_PKTTHR min_t(u32, 128, ENETC_TX_RING_DEFAULT_SIZE / 2)
327 #define ENETC_TXIC_TIMETHR enetc_usecs_to_cycles(600)
329 struct enetc_ndev_priv {
330 struct net_device *ndev;
331 struct device *dev; /* dma-mapping device */
334 int bdr_int_num; /* number of Rx/Tx ring interrupts */
335 struct enetc_int_vector *int_vector[ENETC_MAX_BDR_INT];
336 u16 num_rx_rings, num_tx_rings;
337 u16 rx_bd_count, tx_bd_count;
340 enum enetc_active_offloads active_offloads;
342 u32 speed; /* store speed for compare update pspeed */
344 struct enetc_bdr **xdp_tx_ring;
345 struct enetc_bdr *tx_ring[16];
346 struct enetc_bdr *rx_ring[16];
348 struct enetc_cls_rule *cls_rules;
350 struct psfp_cap psfp_cap;
352 struct phylink *phylink;
356 struct bpf_prog *xdp_prog;
360 struct work_struct tx_onestep_tstamp;
361 struct sk_buff_head tx_skbs;
366 /* VF-PF set primary MAC address message format */
367 struct enetc_msg_cmd_set_primary_mac {
368 struct enetc_msg_cmd_header header;
372 #define ENETC_CBD(R, i) (&(((struct enetc_cbd *)((R).bd_base))[i]))
374 #define ENETC_CBDR_TIMEOUT 1000 /* usecs */
376 /* PTP driver exports */
377 extern int enetc_phc_index;
380 int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv);
381 void enetc_pci_remove(struct pci_dev *pdev);
382 int enetc_alloc_msix(struct enetc_ndev_priv *priv);
383 void enetc_free_msix(struct enetc_ndev_priv *priv);
384 void enetc_get_si_caps(struct enetc_si *si);
385 void enetc_init_si_rings_params(struct enetc_ndev_priv *priv);
386 int enetc_alloc_si_resources(struct enetc_ndev_priv *priv);
387 void enetc_free_si_resources(struct enetc_ndev_priv *priv);
388 int enetc_configure_si(struct enetc_ndev_priv *priv);
390 int enetc_open(struct net_device *ndev);
391 int enetc_close(struct net_device *ndev);
392 void enetc_start(struct net_device *ndev);
393 void enetc_stop(struct net_device *ndev);
394 netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev);
395 struct net_device_stats *enetc_get_stats(struct net_device *ndev);
396 void enetc_set_features(struct net_device *ndev, netdev_features_t features);
397 int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd);
398 int enetc_setup_tc_mqprio(struct net_device *ndev, void *type_data);
399 int enetc_setup_bpf(struct net_device *dev, struct netdev_bpf *xdp);
400 int enetc_xdp_xmit(struct net_device *ndev, int num_frames,
401 struct xdp_frame **frames, u32 flags);
404 void enetc_set_ethtool_ops(struct net_device *ndev);
406 /* control buffer descriptor ring (CBDR) */
407 int enetc_setup_cbdr(struct device *dev, struct enetc_hw *hw, int bd_count,
408 struct enetc_cbdr *cbdr);
409 void enetc_teardown_cbdr(struct enetc_cbdr *cbdr);
410 int enetc_set_mac_flt_entry(struct enetc_si *si, int index,
411 char *mac_addr, int si_map);
412 int enetc_clear_mac_flt_entry(struct enetc_si *si, int index);
413 int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse,
415 void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes);
416 int enetc_get_rss_table(struct enetc_si *si, u32 *table, int count);
417 int enetc_set_rss_table(struct enetc_si *si, const u32 *table, int count);
418 int enetc_send_cmd(struct enetc_si *si, struct enetc_cbd *cbd);
420 static inline void *enetc_cbd_alloc_data_mem(struct enetc_si *si,
421 struct enetc_cbd *cbd,
422 int size, dma_addr_t *dma,
425 struct enetc_cbdr *ring = &si->cbd_ring;
426 dma_addr_t dma_align;
429 data = dma_alloc_coherent(ring->dma_dev,
430 size + ENETC_CBD_DATA_MEM_ALIGN,
433 dev_err(ring->dma_dev, "CBD alloc data memory failed!\n");
437 dma_align = ALIGN(*dma, ENETC_CBD_DATA_MEM_ALIGN);
438 *data_align = PTR_ALIGN(data, ENETC_CBD_DATA_MEM_ALIGN);
440 cbd->addr[0] = cpu_to_le32(lower_32_bits(dma_align));
441 cbd->addr[1] = cpu_to_le32(upper_32_bits(dma_align));
442 cbd->length = cpu_to_le16(size);
447 static inline void enetc_cbd_free_data_mem(struct enetc_si *si, int size,
448 void *data, dma_addr_t *dma)
450 struct enetc_cbdr *ring = &si->cbd_ring;
452 dma_free_coherent(ring->dma_dev, size + ENETC_CBD_DATA_MEM_ALIGN,
456 #ifdef CONFIG_FSL_ENETC_QOS
457 int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data);
458 void enetc_sched_speed_set(struct enetc_ndev_priv *priv, int speed);
459 int enetc_setup_tc_cbs(struct net_device *ndev, void *type_data);
460 int enetc_setup_tc_txtime(struct net_device *ndev, void *type_data);
461 int enetc_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
463 int enetc_setup_tc_psfp(struct net_device *ndev, void *type_data);
464 int enetc_psfp_init(struct enetc_ndev_priv *priv);
465 int enetc_psfp_clean(struct enetc_ndev_priv *priv);
466 int enetc_set_psfp(struct net_device *ndev, bool en);
468 static inline void enetc_get_max_cap(struct enetc_ndev_priv *priv)
472 reg = enetc_port_rd(&priv->si->hw, ENETC_PSIDCAPR);
473 priv->psfp_cap.max_streamid = reg & ENETC_PSIDCAPR_MSK;
474 /* Port stream filter capability */
475 reg = enetc_port_rd(&priv->si->hw, ENETC_PSFCAPR);
476 priv->psfp_cap.max_psfp_filter = reg & ENETC_PSFCAPR_MSK;
477 /* Port stream gate capability */
478 reg = enetc_port_rd(&priv->si->hw, ENETC_PSGCAPR);
479 priv->psfp_cap.max_psfp_gate = (reg & ENETC_PSGCAPR_SGIT_MSK);
480 priv->psfp_cap.max_psfp_gatelist = (reg & ENETC_PSGCAPR_GCL_MSK) >> 16;
481 /* Port flow meter capability */
482 reg = enetc_port_rd(&priv->si->hw, ENETC_PFMCAPR);
483 priv->psfp_cap.max_psfp_meter = reg & ENETC_PFMCAPR_MSK;
486 static inline int enetc_psfp_enable(struct enetc_ndev_priv *priv)
488 struct enetc_hw *hw = &priv->si->hw;
491 enetc_get_max_cap(priv);
493 err = enetc_psfp_init(priv);
497 enetc_wr(hw, ENETC_PPSFPMR, enetc_rd(hw, ENETC_PPSFPMR) |
498 ENETC_PPSFPMR_PSFPEN | ENETC_PPSFPMR_VS |
499 ENETC_PPSFPMR_PVC | ENETC_PPSFPMR_PVZC);
504 static inline int enetc_psfp_disable(struct enetc_ndev_priv *priv)
506 struct enetc_hw *hw = &priv->si->hw;
509 err = enetc_psfp_clean(priv);
513 enetc_wr(hw, ENETC_PPSFPMR, enetc_rd(hw, ENETC_PPSFPMR) &
514 ~ENETC_PPSFPMR_PSFPEN & ~ENETC_PPSFPMR_VS &
515 ~ENETC_PPSFPMR_PVC & ~ENETC_PPSFPMR_PVZC);
517 memset(&priv->psfp_cap, 0, sizeof(struct psfp_cap));
523 #define enetc_setup_tc_taprio(ndev, type_data) -EOPNOTSUPP
524 #define enetc_sched_speed_set(priv, speed) (void)0
525 #define enetc_setup_tc_cbs(ndev, type_data) -EOPNOTSUPP
526 #define enetc_setup_tc_txtime(ndev, type_data) -EOPNOTSUPP
527 #define enetc_setup_tc_psfp(ndev, type_data) -EOPNOTSUPP
528 #define enetc_setup_tc_block_cb NULL
530 #define enetc_get_max_cap(p) \
531 memset(&((p)->psfp_cap), 0, sizeof(struct psfp_cap))
533 static inline int enetc_psfp_enable(struct enetc_ndev_priv *priv)
538 static inline int enetc_psfp_disable(struct enetc_ndev_priv *priv)
543 static inline int enetc_set_psfp(struct net_device *ndev, bool en)