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 #include <net/xdp.h> 15 16 #include "enetc_hw.h" 17 18 #define ENETC_MAC_MAXFRM_SIZE 9600 19 #define ENETC_MAX_MTU (ENETC_MAC_MAXFRM_SIZE - \ 20 (ETH_FCS_LEN + ETH_HLEN + VLAN_HLEN)) 21 22 #define ENETC_CBD_DATA_MEM_ALIGN 64 23 24 struct enetc_tx_swbd { 25 union { 26 struct sk_buff *skb; 27 struct xdp_frame *xdp_frame; 28 }; 29 dma_addr_t dma; 30 struct page *page; /* valid only if is_xdp_tx */ 31 u16 page_offset; /* valid only if is_xdp_tx */ 32 u16 len; 33 enum dma_data_direction dir; 34 u8 is_dma_page:1; 35 u8 check_wb:1; 36 u8 do_twostep_tstamp:1; 37 u8 is_eof:1; 38 u8 is_xdp_tx:1; 39 u8 is_xdp_redirect:1; 40 u8 qbv_en:1; 41 }; 42 43 #define ENETC_RX_MAXFRM_SIZE ENETC_MAC_MAXFRM_SIZE 44 #define ENETC_RXB_TRUESIZE 2048 /* PAGE_SIZE >> 1 */ 45 #define ENETC_RXB_PAD NET_SKB_PAD /* add extra space if needed */ 46 #define ENETC_RXB_DMA_SIZE \ 47 (SKB_WITH_OVERHEAD(ENETC_RXB_TRUESIZE) - ENETC_RXB_PAD) 48 #define ENETC_RXB_DMA_SIZE_XDP \ 49 (SKB_WITH_OVERHEAD(ENETC_RXB_TRUESIZE) - XDP_PACKET_HEADROOM) 50 51 struct enetc_rx_swbd { 52 dma_addr_t dma; 53 struct page *page; 54 u16 page_offset; 55 enum dma_data_direction dir; 56 u16 len; 57 }; 58 59 /* ENETC overhead: optional extension BD + 1 BD gap */ 60 #define ENETC_TXBDS_NEEDED(val) ((val) + 2) 61 /* max # of chained Tx BDs is 15, including head and extension BD */ 62 #define ENETC_MAX_SKB_FRAGS 13 63 #define ENETC_TXBDS_MAX_NEEDED ENETC_TXBDS_NEEDED(ENETC_MAX_SKB_FRAGS + 1) 64 65 struct enetc_ring_stats { 66 unsigned int packets; 67 unsigned int bytes; 68 unsigned int rx_alloc_errs; 69 unsigned int xdp_drops; 70 unsigned int xdp_tx; 71 unsigned int xdp_tx_drops; 72 unsigned int xdp_redirect; 73 unsigned int xdp_redirect_failures; 74 unsigned int recycles; 75 unsigned int recycle_failures; 76 unsigned int win_drop; 77 }; 78 79 struct enetc_xdp_data { 80 struct xdp_rxq_info rxq; 81 struct bpf_prog *prog; 82 int xdp_tx_in_flight; 83 }; 84 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) 88 89 struct enetc_bdr_resource { 90 /* Input arguments saved for teardown */ 91 struct device *dev; /* for DMA mapping */ 92 size_t bd_count; 93 size_t bd_size; 94 95 /* Resource proper */ 96 void *bd_base; /* points to Rx or Tx BD ring */ 97 dma_addr_t bd_dma_base; 98 union { 99 struct enetc_tx_swbd *tx_swbd; 100 struct enetc_rx_swbd *rx_swbd; 101 }; 102 char *tso_headers; 103 dma_addr_t tso_headers_dma; 104 }; 105 106 struct enetc_bdr { 107 struct device *dev; /* for DMA mapping */ 108 struct net_device *ndev; 109 void *bd_base; /* points to Rx or Tx BD ring */ 110 union { 111 void __iomem *tpir; 112 void __iomem *rcir; 113 }; 114 u16 index; 115 u16 prio; 116 int bd_count; /* # of BDs */ 117 int next_to_use; 118 int next_to_clean; 119 union { 120 struct enetc_tx_swbd *tx_swbd; 121 struct enetc_rx_swbd *rx_swbd; 122 }; 123 union { 124 void __iomem *tcir; /* Tx */ 125 int next_to_alloc; /* Rx */ 126 }; 127 void __iomem *idr; /* Interrupt Detect Register pointer */ 128 129 int buffer_offset; 130 struct enetc_xdp_data xdp; 131 132 struct enetc_ring_stats stats; 133 134 dma_addr_t bd_dma_base; 135 u8 tsd_enable; /* Time specific departure */ 136 bool ext_en; /* enable h/w descriptor extensions */ 137 138 /* DMA buffer for TSO headers */ 139 char *tso_headers; 140 dma_addr_t tso_headers_dma; 141 } ____cacheline_aligned_in_smp; 142 143 static inline void enetc_bdr_idx_inc(struct enetc_bdr *bdr, int *i) 144 { 145 if (unlikely(++*i == bdr->bd_count)) 146 *i = 0; 147 } 148 149 static inline int enetc_bd_unused(struct enetc_bdr *bdr) 150 { 151 if (bdr->next_to_clean > bdr->next_to_use) 152 return bdr->next_to_clean - bdr->next_to_use - 1; 153 154 return bdr->bd_count + bdr->next_to_clean - bdr->next_to_use - 1; 155 } 156 157 static inline int enetc_swbd_unused(struct enetc_bdr *bdr) 158 { 159 if (bdr->next_to_clean > bdr->next_to_alloc) 160 return bdr->next_to_clean - bdr->next_to_alloc - 1; 161 162 return bdr->bd_count + bdr->next_to_clean - bdr->next_to_alloc - 1; 163 } 164 165 /* Control BD ring */ 166 #define ENETC_CBDR_DEFAULT_SIZE 64 167 struct enetc_cbdr { 168 void *bd_base; /* points to Rx or Tx BD ring */ 169 void __iomem *pir; 170 void __iomem *cir; 171 void __iomem *mr; /* mode register */ 172 173 int bd_count; /* # of BDs */ 174 int next_to_use; 175 int next_to_clean; 176 177 dma_addr_t bd_dma_base; 178 struct device *dma_dev; 179 }; 180 181 #define ENETC_TXBD(BDR, i) (&(((union enetc_tx_bd *)((BDR).bd_base))[i])) 182 183 static inline union enetc_rx_bd *enetc_rxbd(struct enetc_bdr *rx_ring, int i) 184 { 185 int hw_idx = i; 186 187 #ifdef CONFIG_FSL_ENETC_PTP_CLOCK 188 if (rx_ring->ext_en) 189 hw_idx = 2 * i; 190 #endif 191 return &(((union enetc_rx_bd *)rx_ring->bd_base)[hw_idx]); 192 } 193 194 static inline void enetc_rxbd_next(struct enetc_bdr *rx_ring, 195 union enetc_rx_bd **old_rxbd, int *old_index) 196 { 197 union enetc_rx_bd *new_rxbd = *old_rxbd; 198 int new_index = *old_index; 199 200 new_rxbd++; 201 202 #ifdef CONFIG_FSL_ENETC_PTP_CLOCK 203 if (rx_ring->ext_en) 204 new_rxbd++; 205 #endif 206 207 if (unlikely(++new_index == rx_ring->bd_count)) { 208 new_rxbd = rx_ring->bd_base; 209 new_index = 0; 210 } 211 212 *old_rxbd = new_rxbd; 213 *old_index = new_index; 214 } 215 216 static inline union enetc_rx_bd *enetc_rxbd_ext(union enetc_rx_bd *rxbd) 217 { 218 return ++rxbd; 219 } 220 221 struct enetc_msg_swbd { 222 void *vaddr; 223 dma_addr_t dma; 224 int size; 225 }; 226 227 #define ENETC_REV1 0x1 228 enum enetc_errata { 229 ENETC_ERR_VLAN_ISOL = BIT(0), 230 ENETC_ERR_UCMCSWP = BIT(1), 231 }; 232 233 #define ENETC_SI_F_PSFP BIT(0) 234 #define ENETC_SI_F_QBV BIT(1) 235 #define ENETC_SI_F_QBU BIT(2) 236 237 /* PCI IEP device data */ 238 struct enetc_si { 239 struct pci_dev *pdev; 240 struct enetc_hw hw; 241 enum enetc_errata errata; 242 243 struct net_device *ndev; /* back ref. */ 244 245 struct enetc_cbdr cbd_ring; 246 247 int num_rx_rings; /* how many rings are available in the SI */ 248 int num_tx_rings; 249 int num_fs_entries; 250 int num_rss; /* number of RSS buckets */ 251 unsigned short pad; 252 int hw_features; 253 }; 254 255 #define ENETC_SI_ALIGN 32 256 257 static inline void *enetc_si_priv(const struct enetc_si *si) 258 { 259 return (char *)si + ALIGN(sizeof(struct enetc_si), ENETC_SI_ALIGN); 260 } 261 262 static inline bool enetc_si_is_pf(struct enetc_si *si) 263 { 264 return !!(si->hw.port); 265 } 266 267 static inline int enetc_pf_to_port(struct pci_dev *pf_pdev) 268 { 269 switch (pf_pdev->devfn) { 270 case 0: 271 return 0; 272 case 1: 273 return 1; 274 case 2: 275 return 2; 276 case 6: 277 return 3; 278 default: 279 return -1; 280 } 281 } 282 283 #define ENETC_MAX_NUM_TXQS 8 284 #define ENETC_INT_NAME_MAX (IFNAMSIZ + 8) 285 286 struct enetc_int_vector { 287 void __iomem *rbier; 288 void __iomem *tbier_base; 289 void __iomem *ricr1; 290 unsigned long tx_rings_map; 291 int count_tx_rings; 292 u32 rx_ictt; 293 u16 comp_cnt; 294 bool rx_dim_en, rx_napi_work; 295 struct napi_struct napi ____cacheline_aligned_in_smp; 296 struct dim rx_dim ____cacheline_aligned_in_smp; 297 char name[ENETC_INT_NAME_MAX]; 298 299 struct enetc_bdr rx_ring; 300 struct enetc_bdr tx_ring[]; 301 } ____cacheline_aligned_in_smp; 302 303 struct enetc_cls_rule { 304 struct ethtool_rx_flow_spec fs; 305 int used; 306 }; 307 308 #define ENETC_MAX_BDR_INT 2 /* fixed to max # of available cpus */ 309 struct psfp_cap { 310 u32 max_streamid; 311 u32 max_psfp_filter; 312 u32 max_psfp_gate; 313 u32 max_psfp_gatelist; 314 u32 max_psfp_meter; 315 }; 316 317 #define ENETC_F_TX_TSTAMP_MASK 0xff 318 enum enetc_active_offloads { 319 /* 8 bits reserved for TX timestamp types (hwtstamp_tx_types) */ 320 ENETC_F_TX_TSTAMP = BIT(0), 321 ENETC_F_TX_ONESTEP_SYNC_TSTAMP = BIT(1), 322 323 ENETC_F_RX_TSTAMP = BIT(8), 324 ENETC_F_QBV = BIT(9), 325 ENETC_F_QCI = BIT(10), 326 ENETC_F_QBU = BIT(11), 327 }; 328 329 enum enetc_flags_bit { 330 ENETC_TX_ONESTEP_TSTAMP_IN_PROGRESS = 0, 331 }; 332 333 /* interrupt coalescing modes */ 334 enum enetc_ic_mode { 335 /* one interrupt per frame */ 336 ENETC_IC_NONE = 0, 337 /* activated when int coalescing time is set to a non-0 value */ 338 ENETC_IC_RX_MANUAL = BIT(0), 339 ENETC_IC_TX_MANUAL = BIT(1), 340 /* use dynamic interrupt moderation */ 341 ENETC_IC_RX_ADAPTIVE = BIT(2), 342 }; 343 344 #define ENETC_RXIC_PKTTHR min_t(u32, 256, ENETC_RX_RING_DEFAULT_SIZE / 2) 345 #define ENETC_TXIC_PKTTHR min_t(u32, 128, ENETC_TX_RING_DEFAULT_SIZE / 2) 346 #define ENETC_TXIC_TIMETHR enetc_usecs_to_cycles(600) 347 348 struct enetc_ndev_priv { 349 struct net_device *ndev; 350 struct device *dev; /* dma-mapping device */ 351 struct enetc_si *si; 352 353 int bdr_int_num; /* number of Rx/Tx ring interrupts */ 354 struct enetc_int_vector *int_vector[ENETC_MAX_BDR_INT]; 355 u16 num_rx_rings, num_tx_rings; 356 u16 rx_bd_count, tx_bd_count; 357 358 u16 msg_enable; 359 360 u8 preemptible_tcs; 361 362 enum enetc_active_offloads active_offloads; 363 364 u32 speed; /* store speed for compare update pspeed */ 365 366 struct enetc_bdr **xdp_tx_ring; 367 struct enetc_bdr *tx_ring[16]; 368 struct enetc_bdr *rx_ring[16]; 369 const struct enetc_bdr_resource *tx_res; 370 const struct enetc_bdr_resource *rx_res; 371 372 struct enetc_cls_rule *cls_rules; 373 374 struct psfp_cap psfp_cap; 375 376 /* Minimum number of TX queues required by the network stack */ 377 unsigned int min_num_stack_tx_queues; 378 379 struct phylink *phylink; 380 int ic_mode; 381 u32 tx_ictt; 382 383 struct bpf_prog *xdp_prog; 384 385 unsigned long flags; 386 387 struct work_struct tx_onestep_tstamp; 388 struct sk_buff_head tx_skbs; 389 390 /* Serialize access to MAC Merge state between ethtool requests 391 * and link state updates 392 */ 393 struct mutex mm_lock; 394 }; 395 396 /* Messaging */ 397 398 /* VF-PF set primary MAC address message format */ 399 struct enetc_msg_cmd_set_primary_mac { 400 struct enetc_msg_cmd_header header; 401 struct sockaddr mac; 402 }; 403 404 #define ENETC_CBD(R, i) (&(((struct enetc_cbd *)((R).bd_base))[i])) 405 406 #define ENETC_CBDR_TIMEOUT 1000 /* usecs */ 407 408 /* PTP driver exports */ 409 extern int enetc_phc_index; 410 411 /* SI common */ 412 u32 enetc_port_mac_rd(struct enetc_si *si, u32 reg); 413 void enetc_port_mac_wr(struct enetc_si *si, u32 reg, u32 val); 414 int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv); 415 void enetc_pci_remove(struct pci_dev *pdev); 416 int enetc_alloc_msix(struct enetc_ndev_priv *priv); 417 void enetc_free_msix(struct enetc_ndev_priv *priv); 418 void enetc_get_si_caps(struct enetc_si *si); 419 void enetc_init_si_rings_params(struct enetc_ndev_priv *priv); 420 int enetc_alloc_si_resources(struct enetc_ndev_priv *priv); 421 void enetc_free_si_resources(struct enetc_ndev_priv *priv); 422 int enetc_configure_si(struct enetc_ndev_priv *priv); 423 424 int enetc_open(struct net_device *ndev); 425 int enetc_close(struct net_device *ndev); 426 void enetc_start(struct net_device *ndev); 427 void enetc_stop(struct net_device *ndev); 428 netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev); 429 struct net_device_stats *enetc_get_stats(struct net_device *ndev); 430 void enetc_set_features(struct net_device *ndev, netdev_features_t features); 431 int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd); 432 int enetc_setup_tc_mqprio(struct net_device *ndev, void *type_data); 433 void enetc_reset_tc_mqprio(struct net_device *ndev); 434 int enetc_setup_bpf(struct net_device *ndev, struct netdev_bpf *bpf); 435 int enetc_xdp_xmit(struct net_device *ndev, int num_frames, 436 struct xdp_frame **frames, u32 flags); 437 438 /* ethtool */ 439 void enetc_set_ethtool_ops(struct net_device *ndev); 440 void enetc_mm_link_state_update(struct enetc_ndev_priv *priv, bool link); 441 void enetc_mm_commit_preemptible_tcs(struct enetc_ndev_priv *priv); 442 443 /* control buffer descriptor ring (CBDR) */ 444 int enetc_setup_cbdr(struct device *dev, struct enetc_hw *hw, int bd_count, 445 struct enetc_cbdr *cbdr); 446 void enetc_teardown_cbdr(struct enetc_cbdr *cbdr); 447 int enetc_set_mac_flt_entry(struct enetc_si *si, int index, 448 char *mac_addr, int si_map); 449 int enetc_clear_mac_flt_entry(struct enetc_si *si, int index); 450 int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse, 451 int index); 452 void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes); 453 int enetc_get_rss_table(struct enetc_si *si, u32 *table, int count); 454 int enetc_set_rss_table(struct enetc_si *si, const u32 *table, int count); 455 int enetc_send_cmd(struct enetc_si *si, struct enetc_cbd *cbd); 456 457 static inline void *enetc_cbd_alloc_data_mem(struct enetc_si *si, 458 struct enetc_cbd *cbd, 459 int size, dma_addr_t *dma, 460 void **data_align) 461 { 462 struct enetc_cbdr *ring = &si->cbd_ring; 463 dma_addr_t dma_align; 464 void *data; 465 466 data = dma_alloc_coherent(ring->dma_dev, 467 size + ENETC_CBD_DATA_MEM_ALIGN, 468 dma, GFP_KERNEL); 469 if (!data) { 470 dev_err(ring->dma_dev, "CBD alloc data memory failed!\n"); 471 return NULL; 472 } 473 474 dma_align = ALIGN(*dma, ENETC_CBD_DATA_MEM_ALIGN); 475 *data_align = PTR_ALIGN(data, ENETC_CBD_DATA_MEM_ALIGN); 476 477 cbd->addr[0] = cpu_to_le32(lower_32_bits(dma_align)); 478 cbd->addr[1] = cpu_to_le32(upper_32_bits(dma_align)); 479 cbd->length = cpu_to_le16(size); 480 481 return data; 482 } 483 484 static inline void enetc_cbd_free_data_mem(struct enetc_si *si, int size, 485 void *data, dma_addr_t *dma) 486 { 487 struct enetc_cbdr *ring = &si->cbd_ring; 488 489 dma_free_coherent(ring->dma_dev, size + ENETC_CBD_DATA_MEM_ALIGN, 490 data, *dma); 491 } 492 493 void enetc_reset_ptcmsdur(struct enetc_hw *hw); 494 void enetc_set_ptcmsdur(struct enetc_hw *hw, u32 *queue_max_sdu); 495 496 #ifdef CONFIG_FSL_ENETC_QOS 497 int enetc_qos_query_caps(struct net_device *ndev, void *type_data); 498 int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data); 499 void enetc_sched_speed_set(struct enetc_ndev_priv *priv, int speed); 500 int enetc_setup_tc_cbs(struct net_device *ndev, void *type_data); 501 int enetc_setup_tc_txtime(struct net_device *ndev, void *type_data); 502 int enetc_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 503 void *cb_priv); 504 int enetc_setup_tc_psfp(struct net_device *ndev, void *type_data); 505 int enetc_psfp_init(struct enetc_ndev_priv *priv); 506 int enetc_psfp_clean(struct enetc_ndev_priv *priv); 507 int enetc_set_psfp(struct net_device *ndev, bool en); 508 509 static inline void enetc_get_max_cap(struct enetc_ndev_priv *priv) 510 { 511 struct enetc_hw *hw = &priv->si->hw; 512 u32 reg; 513 514 reg = enetc_port_rd(hw, ENETC_PSIDCAPR); 515 priv->psfp_cap.max_streamid = reg & ENETC_PSIDCAPR_MSK; 516 /* Port stream filter capability */ 517 reg = enetc_port_rd(hw, ENETC_PSFCAPR); 518 priv->psfp_cap.max_psfp_filter = reg & ENETC_PSFCAPR_MSK; 519 /* Port stream gate capability */ 520 reg = enetc_port_rd(hw, ENETC_PSGCAPR); 521 priv->psfp_cap.max_psfp_gate = (reg & ENETC_PSGCAPR_SGIT_MSK); 522 priv->psfp_cap.max_psfp_gatelist = (reg & ENETC_PSGCAPR_GCL_MSK) >> 16; 523 /* Port flow meter capability */ 524 reg = enetc_port_rd(hw, ENETC_PFMCAPR); 525 priv->psfp_cap.max_psfp_meter = reg & ENETC_PFMCAPR_MSK; 526 } 527 528 static inline int enetc_psfp_enable(struct enetc_ndev_priv *priv) 529 { 530 struct enetc_hw *hw = &priv->si->hw; 531 int err; 532 533 enetc_get_max_cap(priv); 534 535 err = enetc_psfp_init(priv); 536 if (err) 537 return err; 538 539 enetc_wr(hw, ENETC_PPSFPMR, enetc_rd(hw, ENETC_PPSFPMR) | 540 ENETC_PPSFPMR_PSFPEN | ENETC_PPSFPMR_VS | 541 ENETC_PPSFPMR_PVC | ENETC_PPSFPMR_PVZC); 542 543 return 0; 544 } 545 546 static inline int enetc_psfp_disable(struct enetc_ndev_priv *priv) 547 { 548 struct enetc_hw *hw = &priv->si->hw; 549 int err; 550 551 err = enetc_psfp_clean(priv); 552 if (err) 553 return err; 554 555 enetc_wr(hw, ENETC_PPSFPMR, enetc_rd(hw, ENETC_PPSFPMR) & 556 ~ENETC_PPSFPMR_PSFPEN & ~ENETC_PPSFPMR_VS & 557 ~ENETC_PPSFPMR_PVC & ~ENETC_PPSFPMR_PVZC); 558 559 memset(&priv->psfp_cap, 0, sizeof(struct psfp_cap)); 560 561 return 0; 562 } 563 564 #else 565 #define enetc_qos_query_caps(ndev, type_data) -EOPNOTSUPP 566 #define enetc_setup_tc_taprio(ndev, type_data) -EOPNOTSUPP 567 #define enetc_sched_speed_set(priv, speed) (void)0 568 #define enetc_setup_tc_cbs(ndev, type_data) -EOPNOTSUPP 569 #define enetc_setup_tc_txtime(ndev, type_data) -EOPNOTSUPP 570 #define enetc_setup_tc_psfp(ndev, type_data) -EOPNOTSUPP 571 #define enetc_setup_tc_block_cb NULL 572 573 #define enetc_get_max_cap(p) \ 574 memset(&((p)->psfp_cap), 0, sizeof(struct psfp_cap)) 575 576 static inline int enetc_psfp_enable(struct enetc_ndev_priv *priv) 577 { 578 return 0; 579 } 580 581 static inline int enetc_psfp_disable(struct enetc_ndev_priv *priv) 582 { 583 return 0; 584 } 585 586 static inline int enetc_set_psfp(struct net_device *ndev, bool en) 587 { 588 return 0; 589 } 590 #endif 591