1 /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */ 2 /* Copyright 2017-2019 NXP */ 3 4 #include <linux/timer.h> 5 #include <linux/pci.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> 14 15 #include "enetc_hw.h" 16 17 #define ENETC_MAC_MAXFRM_SIZE 9600 18 #define ENETC_MAX_MTU (ENETC_MAC_MAXFRM_SIZE - \ 19 (ETH_FCS_LEN + ETH_HLEN + VLAN_HLEN)) 20 21 struct enetc_tx_swbd { 22 union { 23 struct sk_buff *skb; 24 struct xdp_frame *xdp_frame; 25 }; 26 dma_addr_t dma; 27 struct page *page; /* valid only if is_xdp_tx */ 28 u16 page_offset; /* valid only if is_xdp_tx */ 29 u16 len; 30 enum dma_data_direction dir; 31 u8 is_dma_page:1; 32 u8 check_wb:1; 33 u8 do_twostep_tstamp:1; 34 u8 is_eof:1; 35 u8 is_xdp_tx:1; 36 u8 is_xdp_redirect:1; 37 }; 38 39 #define ENETC_RX_MAXFRM_SIZE ENETC_MAC_MAXFRM_SIZE 40 #define ENETC_RXB_TRUESIZE 2048 /* PAGE_SIZE >> 1 */ 41 #define ENETC_RXB_PAD NET_SKB_PAD /* add extra space if needed */ 42 #define ENETC_RXB_DMA_SIZE \ 43 (SKB_WITH_OVERHEAD(ENETC_RXB_TRUESIZE) - ENETC_RXB_PAD) 44 #define ENETC_RXB_DMA_SIZE_XDP \ 45 (SKB_WITH_OVERHEAD(ENETC_RXB_TRUESIZE) - XDP_PACKET_HEADROOM) 46 47 struct enetc_rx_swbd { 48 dma_addr_t dma; 49 struct page *page; 50 u16 page_offset; 51 enum dma_data_direction dir; 52 u16 len; 53 }; 54 55 /* ENETC overhead: optional extension BD + 1 BD gap */ 56 #define ENETC_TXBDS_NEEDED(val) ((val) + 2) 57 /* max # of chained Tx BDs is 15, including head and extension BD */ 58 #define ENETC_MAX_SKB_FRAGS 13 59 #define ENETC_TXBDS_MAX_NEEDED ENETC_TXBDS_NEEDED(ENETC_MAX_SKB_FRAGS + 1) 60 61 struct enetc_ring_stats { 62 unsigned int packets; 63 unsigned int bytes; 64 unsigned int rx_alloc_errs; 65 unsigned int xdp_drops; 66 unsigned int xdp_tx; 67 unsigned int xdp_tx_drops; 68 unsigned int xdp_redirect; 69 unsigned int xdp_redirect_failures; 70 unsigned int xdp_redirect_sg; 71 unsigned int recycles; 72 unsigned int recycle_failures; 73 }; 74 75 struct enetc_xdp_data { 76 struct xdp_rxq_info rxq; 77 struct bpf_prog *prog; 78 int xdp_tx_in_flight; 79 }; 80 81 #define ENETC_RX_RING_DEFAULT_SIZE 2048 82 #define ENETC_TX_RING_DEFAULT_SIZE 2048 83 #define ENETC_DEFAULT_TX_WORK (ENETC_TX_RING_DEFAULT_SIZE / 2) 84 85 struct enetc_bdr { 86 struct device *dev; /* for DMA mapping */ 87 struct net_device *ndev; 88 void *bd_base; /* points to Rx or Tx BD ring */ 89 union { 90 void __iomem *tpir; 91 void __iomem *rcir; 92 }; 93 u16 index; 94 int bd_count; /* # of BDs */ 95 int next_to_use; 96 int next_to_clean; 97 union { 98 struct enetc_tx_swbd *tx_swbd; 99 struct enetc_rx_swbd *rx_swbd; 100 }; 101 union { 102 void __iomem *tcir; /* Tx */ 103 int next_to_alloc; /* Rx */ 104 }; 105 void __iomem *idr; /* Interrupt Detect Register pointer */ 106 107 int buffer_offset; 108 struct enetc_xdp_data xdp; 109 110 struct enetc_ring_stats stats; 111 112 dma_addr_t bd_dma_base; 113 u8 tsd_enable; /* Time specific departure */ 114 bool ext_en; /* enable h/w descriptor extensions */ 115 } ____cacheline_aligned_in_smp; 116 117 static inline void enetc_bdr_idx_inc(struct enetc_bdr *bdr, int *i) 118 { 119 if (unlikely(++*i == bdr->bd_count)) 120 *i = 0; 121 } 122 123 static inline int enetc_bd_unused(struct enetc_bdr *bdr) 124 { 125 if (bdr->next_to_clean > bdr->next_to_use) 126 return bdr->next_to_clean - bdr->next_to_use - 1; 127 128 return bdr->bd_count + bdr->next_to_clean - bdr->next_to_use - 1; 129 } 130 131 static inline int enetc_swbd_unused(struct enetc_bdr *bdr) 132 { 133 if (bdr->next_to_clean > bdr->next_to_alloc) 134 return bdr->next_to_clean - bdr->next_to_alloc - 1; 135 136 return bdr->bd_count + bdr->next_to_clean - bdr->next_to_alloc - 1; 137 } 138 139 /* Control BD ring */ 140 #define ENETC_CBDR_DEFAULT_SIZE 64 141 struct enetc_cbdr { 142 void *bd_base; /* points to Rx or Tx BD ring */ 143 void __iomem *pir; 144 void __iomem *cir; 145 void __iomem *mr; /* mode register */ 146 147 int bd_count; /* # of BDs */ 148 int next_to_use; 149 int next_to_clean; 150 151 dma_addr_t bd_dma_base; 152 struct device *dma_dev; 153 }; 154 155 #define ENETC_TXBD(BDR, i) (&(((union enetc_tx_bd *)((BDR).bd_base))[i])) 156 157 static inline union enetc_rx_bd *enetc_rxbd(struct enetc_bdr *rx_ring, int i) 158 { 159 int hw_idx = i; 160 161 #ifdef CONFIG_FSL_ENETC_PTP_CLOCK 162 if (rx_ring->ext_en) 163 hw_idx = 2 * i; 164 #endif 165 return &(((union enetc_rx_bd *)rx_ring->bd_base)[hw_idx]); 166 } 167 168 static inline void enetc_rxbd_next(struct enetc_bdr *rx_ring, 169 union enetc_rx_bd **old_rxbd, int *old_index) 170 { 171 union enetc_rx_bd *new_rxbd = *old_rxbd; 172 int new_index = *old_index; 173 174 new_rxbd++; 175 176 #ifdef CONFIG_FSL_ENETC_PTP_CLOCK 177 if (rx_ring->ext_en) 178 new_rxbd++; 179 #endif 180 181 if (unlikely(++new_index == rx_ring->bd_count)) { 182 new_rxbd = rx_ring->bd_base; 183 new_index = 0; 184 } 185 186 *old_rxbd = new_rxbd; 187 *old_index = new_index; 188 } 189 190 static inline union enetc_rx_bd *enetc_rxbd_ext(union enetc_rx_bd *rxbd) 191 { 192 return ++rxbd; 193 } 194 195 struct enetc_msg_swbd { 196 void *vaddr; 197 dma_addr_t dma; 198 int size; 199 }; 200 201 #define ENETC_REV1 0x1 202 enum enetc_errata { 203 ENETC_ERR_VLAN_ISOL = BIT(0), 204 ENETC_ERR_UCMCSWP = BIT(1), 205 }; 206 207 #define ENETC_SI_F_QBV BIT(0) 208 #define ENETC_SI_F_PSFP BIT(1) 209 210 /* PCI IEP device data */ 211 struct enetc_si { 212 struct pci_dev *pdev; 213 struct enetc_hw hw; 214 enum enetc_errata errata; 215 216 struct net_device *ndev; /* back ref. */ 217 218 struct enetc_cbdr cbd_ring; 219 220 int num_rx_rings; /* how many rings are available in the SI */ 221 int num_tx_rings; 222 int num_fs_entries; 223 int num_rss; /* number of RSS buckets */ 224 unsigned short pad; 225 int hw_features; 226 }; 227 228 #define ENETC_SI_ALIGN 32 229 230 static inline void *enetc_si_priv(const struct enetc_si *si) 231 { 232 return (char *)si + ALIGN(sizeof(struct enetc_si), ENETC_SI_ALIGN); 233 } 234 235 static inline bool enetc_si_is_pf(struct enetc_si *si) 236 { 237 return !!(si->hw.port); 238 } 239 240 static inline int enetc_pf_to_port(struct pci_dev *pf_pdev) 241 { 242 switch (pf_pdev->devfn) { 243 case 0: 244 return 0; 245 case 1: 246 return 1; 247 case 2: 248 return 2; 249 case 6: 250 return 3; 251 default: 252 return -1; 253 } 254 } 255 256 #define ENETC_MAX_NUM_TXQS 8 257 #define ENETC_INT_NAME_MAX (IFNAMSIZ + 8) 258 259 struct enetc_int_vector { 260 void __iomem *rbier; 261 void __iomem *tbier_base; 262 void __iomem *ricr1; 263 unsigned long tx_rings_map; 264 int count_tx_rings; 265 u32 rx_ictt; 266 u16 comp_cnt; 267 bool rx_dim_en, rx_napi_work; 268 struct napi_struct napi ____cacheline_aligned_in_smp; 269 struct dim rx_dim ____cacheline_aligned_in_smp; 270 char name[ENETC_INT_NAME_MAX]; 271 272 struct enetc_bdr rx_ring; 273 struct enetc_bdr tx_ring[]; 274 } ____cacheline_aligned_in_smp; 275 276 struct enetc_cls_rule { 277 struct ethtool_rx_flow_spec fs; 278 int used; 279 }; 280 281 #define ENETC_MAX_BDR_INT 2 /* fixed to max # of available cpus */ 282 struct psfp_cap { 283 u32 max_streamid; 284 u32 max_psfp_filter; 285 u32 max_psfp_gate; 286 u32 max_psfp_gatelist; 287 u32 max_psfp_meter; 288 }; 289 290 #define ENETC_F_TX_TSTAMP_MASK 0xff 291 /* TODO: more hardware offloads */ 292 enum enetc_active_offloads { 293 /* 8 bits reserved for TX timestamp types (hwtstamp_tx_types) */ 294 ENETC_F_TX_TSTAMP = BIT(0), 295 ENETC_F_TX_ONESTEP_SYNC_TSTAMP = BIT(1), 296 297 ENETC_F_RX_TSTAMP = BIT(8), 298 ENETC_F_QBV = BIT(9), 299 ENETC_F_QCI = BIT(10), 300 }; 301 302 enum enetc_flags_bit { 303 ENETC_TX_ONESTEP_TSTAMP_IN_PROGRESS = 0, 304 }; 305 306 /* interrupt coalescing modes */ 307 enum enetc_ic_mode { 308 /* one interrupt per frame */ 309 ENETC_IC_NONE = 0, 310 /* activated when int coalescing time is set to a non-0 value */ 311 ENETC_IC_RX_MANUAL = BIT(0), 312 ENETC_IC_TX_MANUAL = BIT(1), 313 /* use dynamic interrupt moderation */ 314 ENETC_IC_RX_ADAPTIVE = BIT(2), 315 }; 316 317 #define ENETC_RXIC_PKTTHR min_t(u32, 256, ENETC_RX_RING_DEFAULT_SIZE / 2) 318 #define ENETC_TXIC_PKTTHR min_t(u32, 128, ENETC_TX_RING_DEFAULT_SIZE / 2) 319 #define ENETC_TXIC_TIMETHR enetc_usecs_to_cycles(600) 320 321 struct enetc_ndev_priv { 322 struct net_device *ndev; 323 struct device *dev; /* dma-mapping device */ 324 struct enetc_si *si; 325 326 int bdr_int_num; /* number of Rx/Tx ring interrupts */ 327 struct enetc_int_vector *int_vector[ENETC_MAX_BDR_INT]; 328 u16 num_rx_rings, num_tx_rings; 329 u16 rx_bd_count, tx_bd_count; 330 331 u16 msg_enable; 332 enum enetc_active_offloads active_offloads; 333 334 u32 speed; /* store speed for compare update pspeed */ 335 336 struct enetc_bdr **xdp_tx_ring; 337 struct enetc_bdr *tx_ring[16]; 338 struct enetc_bdr *rx_ring[16]; 339 340 struct enetc_cls_rule *cls_rules; 341 342 struct psfp_cap psfp_cap; 343 344 struct phylink *phylink; 345 int ic_mode; 346 u32 tx_ictt; 347 348 struct bpf_prog *xdp_prog; 349 350 unsigned long flags; 351 352 struct work_struct tx_onestep_tstamp; 353 struct sk_buff_head tx_skbs; 354 }; 355 356 /* Messaging */ 357 358 /* VF-PF set primary MAC address message format */ 359 struct enetc_msg_cmd_set_primary_mac { 360 struct enetc_msg_cmd_header header; 361 struct sockaddr mac; 362 }; 363 364 #define ENETC_CBD(R, i) (&(((struct enetc_cbd *)((R).bd_base))[i])) 365 366 #define ENETC_CBDR_TIMEOUT 1000 /* usecs */ 367 368 /* PTP driver exports */ 369 extern int enetc_phc_index; 370 371 /* SI common */ 372 int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv); 373 void enetc_pci_remove(struct pci_dev *pdev); 374 int enetc_alloc_msix(struct enetc_ndev_priv *priv); 375 void enetc_free_msix(struct enetc_ndev_priv *priv); 376 void enetc_get_si_caps(struct enetc_si *si); 377 void enetc_init_si_rings_params(struct enetc_ndev_priv *priv); 378 int enetc_alloc_si_resources(struct enetc_ndev_priv *priv); 379 void enetc_free_si_resources(struct enetc_ndev_priv *priv); 380 int enetc_configure_si(struct enetc_ndev_priv *priv); 381 382 int enetc_open(struct net_device *ndev); 383 int enetc_close(struct net_device *ndev); 384 void enetc_start(struct net_device *ndev); 385 void enetc_stop(struct net_device *ndev); 386 netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev); 387 struct net_device_stats *enetc_get_stats(struct net_device *ndev); 388 int enetc_set_features(struct net_device *ndev, 389 netdev_features_t features); 390 int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd); 391 int enetc_setup_tc(struct net_device *ndev, enum tc_setup_type type, 392 void *type_data); 393 int enetc_setup_bpf(struct net_device *dev, struct netdev_bpf *xdp); 394 int enetc_xdp_xmit(struct net_device *ndev, int num_frames, 395 struct xdp_frame **frames, u32 flags); 396 397 /* ethtool */ 398 void enetc_set_ethtool_ops(struct net_device *ndev); 399 400 /* control buffer descriptor ring (CBDR) */ 401 int enetc_setup_cbdr(struct device *dev, struct enetc_hw *hw, int bd_count, 402 struct enetc_cbdr *cbdr); 403 void enetc_teardown_cbdr(struct enetc_cbdr *cbdr); 404 int enetc_set_mac_flt_entry(struct enetc_si *si, int index, 405 char *mac_addr, int si_map); 406 int enetc_clear_mac_flt_entry(struct enetc_si *si, int index); 407 int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse, 408 int index); 409 void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes); 410 int enetc_get_rss_table(struct enetc_si *si, u32 *table, int count); 411 int enetc_set_rss_table(struct enetc_si *si, const u32 *table, int count); 412 int enetc_send_cmd(struct enetc_si *si, struct enetc_cbd *cbd); 413 414 #ifdef CONFIG_FSL_ENETC_QOS 415 int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data); 416 void enetc_sched_speed_set(struct enetc_ndev_priv *priv, int speed); 417 int enetc_setup_tc_cbs(struct net_device *ndev, void *type_data); 418 int enetc_setup_tc_txtime(struct net_device *ndev, void *type_data); 419 int enetc_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 420 void *cb_priv); 421 int enetc_setup_tc_psfp(struct net_device *ndev, void *type_data); 422 int enetc_psfp_init(struct enetc_ndev_priv *priv); 423 int enetc_psfp_clean(struct enetc_ndev_priv *priv); 424 425 static inline void enetc_get_max_cap(struct enetc_ndev_priv *priv) 426 { 427 u32 reg; 428 429 reg = enetc_port_rd(&priv->si->hw, ENETC_PSIDCAPR); 430 priv->psfp_cap.max_streamid = reg & ENETC_PSIDCAPR_MSK; 431 /* Port stream filter capability */ 432 reg = enetc_port_rd(&priv->si->hw, ENETC_PSFCAPR); 433 priv->psfp_cap.max_psfp_filter = reg & ENETC_PSFCAPR_MSK; 434 /* Port stream gate capability */ 435 reg = enetc_port_rd(&priv->si->hw, ENETC_PSGCAPR); 436 priv->psfp_cap.max_psfp_gate = (reg & ENETC_PSGCAPR_SGIT_MSK); 437 priv->psfp_cap.max_psfp_gatelist = (reg & ENETC_PSGCAPR_GCL_MSK) >> 16; 438 /* Port flow meter capability */ 439 reg = enetc_port_rd(&priv->si->hw, ENETC_PFMCAPR); 440 priv->psfp_cap.max_psfp_meter = reg & ENETC_PFMCAPR_MSK; 441 } 442 443 static inline int enetc_psfp_enable(struct enetc_ndev_priv *priv) 444 { 445 struct enetc_hw *hw = &priv->si->hw; 446 int err; 447 448 enetc_get_max_cap(priv); 449 450 err = enetc_psfp_init(priv); 451 if (err) 452 return err; 453 454 enetc_wr(hw, ENETC_PPSFPMR, enetc_rd(hw, ENETC_PPSFPMR) | 455 ENETC_PPSFPMR_PSFPEN | ENETC_PPSFPMR_VS | 456 ENETC_PPSFPMR_PVC | ENETC_PPSFPMR_PVZC); 457 458 return 0; 459 } 460 461 static inline int enetc_psfp_disable(struct enetc_ndev_priv *priv) 462 { 463 struct enetc_hw *hw = &priv->si->hw; 464 int err; 465 466 err = enetc_psfp_clean(priv); 467 if (err) 468 return err; 469 470 enetc_wr(hw, ENETC_PPSFPMR, enetc_rd(hw, ENETC_PPSFPMR) & 471 ~ENETC_PPSFPMR_PSFPEN & ~ENETC_PPSFPMR_VS & 472 ~ENETC_PPSFPMR_PVC & ~ENETC_PPSFPMR_PVZC); 473 474 memset(&priv->psfp_cap, 0, sizeof(struct psfp_cap)); 475 476 return 0; 477 } 478 479 #else 480 #define enetc_setup_tc_taprio(ndev, type_data) -EOPNOTSUPP 481 #define enetc_sched_speed_set(priv, speed) (void)0 482 #define enetc_setup_tc_cbs(ndev, type_data) -EOPNOTSUPP 483 #define enetc_setup_tc_txtime(ndev, type_data) -EOPNOTSUPP 484 #define enetc_setup_tc_psfp(ndev, type_data) -EOPNOTSUPP 485 #define enetc_setup_tc_block_cb NULL 486 487 #define enetc_get_max_cap(p) \ 488 memset(&((p)->psfp_cap), 0, sizeof(struct psfp_cap)) 489 490 static inline int enetc_psfp_enable(struct enetc_ndev_priv *priv) 491 { 492 return 0; 493 } 494 495 static inline int enetc_psfp_disable(struct enetc_ndev_priv *priv) 496 { 497 return 0; 498 } 499 #endif 500