1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /******************************************************************************* 3 STMMAC Common Header File 4 5 Copyright (C) 2007-2009 STMicroelectronics Ltd 6 7 8 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> 9 *******************************************************************************/ 10 11 #ifndef __COMMON_H__ 12 #define __COMMON_H__ 13 14 #include <linux/etherdevice.h> 15 #include <linux/netdevice.h> 16 #include <linux/stmmac.h> 17 #include <linux/phy.h> 18 #include <linux/pcs/pcs-xpcs.h> 19 #include <linux/module.h> 20 #if IS_ENABLED(CONFIG_VLAN_8021Q) 21 #define STMMAC_VLAN_TAG_USED 22 #include <linux/if_vlan.h> 23 #endif 24 25 #include "descs.h" 26 #include "hwif.h" 27 #include "mmc.h" 28 29 /* Synopsys Core versions */ 30 #define DWMAC_CORE_3_40 0x34 31 #define DWMAC_CORE_3_50 0x35 32 #define DWMAC_CORE_4_00 0x40 33 #define DWMAC_CORE_4_10 0x41 34 #define DWMAC_CORE_5_00 0x50 35 #define DWMAC_CORE_5_10 0x51 36 #define DWXGMAC_CORE_2_10 0x21 37 #define DWXLGMAC_CORE_2_00 0x20 38 39 /* Device ID */ 40 #define DWXGMAC_ID 0x76 41 #define DWXLGMAC_ID 0x27 42 43 #define STMMAC_CHAN0 0 /* Always supported and default for all chips */ 44 45 /* TX and RX Descriptor Length, these need to be power of two. 46 * TX descriptor length less than 64 may cause transmit queue timed out error. 47 * RX descriptor length less than 64 may cause inconsistent Rx chain error. 48 */ 49 #define DMA_MIN_TX_SIZE 64 50 #define DMA_MAX_TX_SIZE 1024 51 #define DMA_DEFAULT_TX_SIZE 512 52 #define DMA_MIN_RX_SIZE 64 53 #define DMA_MAX_RX_SIZE 1024 54 #define DMA_DEFAULT_RX_SIZE 512 55 #define STMMAC_GET_ENTRY(x, size) ((x + 1) & (size - 1)) 56 57 #undef FRAME_FILTER_DEBUG 58 /* #define FRAME_FILTER_DEBUG */ 59 60 /* Extra statistic and debug information exposed by ethtool */ 61 struct stmmac_extra_stats { 62 /* Transmit errors */ 63 unsigned long tx_underflow ____cacheline_aligned; 64 unsigned long tx_carrier; 65 unsigned long tx_losscarrier; 66 unsigned long vlan_tag; 67 unsigned long tx_deferred; 68 unsigned long tx_vlan; 69 unsigned long tx_jabber; 70 unsigned long tx_frame_flushed; 71 unsigned long tx_payload_error; 72 unsigned long tx_ip_header_error; 73 /* Receive errors */ 74 unsigned long rx_desc; 75 unsigned long sa_filter_fail; 76 unsigned long overflow_error; 77 unsigned long ipc_csum_error; 78 unsigned long rx_collision; 79 unsigned long rx_crc_errors; 80 unsigned long dribbling_bit; 81 unsigned long rx_length; 82 unsigned long rx_mii; 83 unsigned long rx_multicast; 84 unsigned long rx_gmac_overflow; 85 unsigned long rx_watchdog; 86 unsigned long da_rx_filter_fail; 87 unsigned long sa_rx_filter_fail; 88 unsigned long rx_missed_cntr; 89 unsigned long rx_overflow_cntr; 90 unsigned long rx_vlan; 91 unsigned long rx_split_hdr_pkt_n; 92 /* Tx/Rx IRQ error info */ 93 unsigned long tx_undeflow_irq; 94 unsigned long tx_process_stopped_irq; 95 unsigned long tx_jabber_irq; 96 unsigned long rx_overflow_irq; 97 unsigned long rx_buf_unav_irq; 98 unsigned long rx_process_stopped_irq; 99 unsigned long rx_watchdog_irq; 100 unsigned long tx_early_irq; 101 unsigned long fatal_bus_error_irq; 102 /* Tx/Rx IRQ Events */ 103 unsigned long rx_early_irq; 104 unsigned long threshold; 105 unsigned long tx_pkt_n; 106 unsigned long rx_pkt_n; 107 unsigned long normal_irq_n; 108 unsigned long rx_normal_irq_n; 109 unsigned long napi_poll; 110 unsigned long tx_normal_irq_n; 111 unsigned long tx_clean; 112 unsigned long tx_set_ic_bit; 113 unsigned long irq_receive_pmt_irq_n; 114 /* MMC info */ 115 unsigned long mmc_tx_irq_n; 116 unsigned long mmc_rx_irq_n; 117 unsigned long mmc_rx_csum_offload_irq_n; 118 /* EEE */ 119 unsigned long irq_tx_path_in_lpi_mode_n; 120 unsigned long irq_tx_path_exit_lpi_mode_n; 121 unsigned long irq_rx_path_in_lpi_mode_n; 122 unsigned long irq_rx_path_exit_lpi_mode_n; 123 unsigned long phy_eee_wakeup_error_n; 124 /* Extended RDES status */ 125 unsigned long ip_hdr_err; 126 unsigned long ip_payload_err; 127 unsigned long ip_csum_bypassed; 128 unsigned long ipv4_pkt_rcvd; 129 unsigned long ipv6_pkt_rcvd; 130 unsigned long no_ptp_rx_msg_type_ext; 131 unsigned long ptp_rx_msg_type_sync; 132 unsigned long ptp_rx_msg_type_follow_up; 133 unsigned long ptp_rx_msg_type_delay_req; 134 unsigned long ptp_rx_msg_type_delay_resp; 135 unsigned long ptp_rx_msg_type_pdelay_req; 136 unsigned long ptp_rx_msg_type_pdelay_resp; 137 unsigned long ptp_rx_msg_type_pdelay_follow_up; 138 unsigned long ptp_rx_msg_type_announce; 139 unsigned long ptp_rx_msg_type_management; 140 unsigned long ptp_rx_msg_pkt_reserved_type; 141 unsigned long ptp_frame_type; 142 unsigned long ptp_ver; 143 unsigned long timestamp_dropped; 144 unsigned long av_pkt_rcvd; 145 unsigned long av_tagged_pkt_rcvd; 146 unsigned long vlan_tag_priority_val; 147 unsigned long l3_filter_match; 148 unsigned long l4_filter_match; 149 unsigned long l3_l4_filter_no_match; 150 /* PCS */ 151 unsigned long irq_pcs_ane_n; 152 unsigned long irq_pcs_link_n; 153 unsigned long irq_rgmii_n; 154 unsigned long pcs_link; 155 unsigned long pcs_duplex; 156 unsigned long pcs_speed; 157 /* debug register */ 158 unsigned long mtl_tx_status_fifo_full; 159 unsigned long mtl_tx_fifo_not_empty; 160 unsigned long mmtl_fifo_ctrl; 161 unsigned long mtl_tx_fifo_read_ctrl_write; 162 unsigned long mtl_tx_fifo_read_ctrl_wait; 163 unsigned long mtl_tx_fifo_read_ctrl_read; 164 unsigned long mtl_tx_fifo_read_ctrl_idle; 165 unsigned long mac_tx_in_pause; 166 unsigned long mac_tx_frame_ctrl_xfer; 167 unsigned long mac_tx_frame_ctrl_idle; 168 unsigned long mac_tx_frame_ctrl_wait; 169 unsigned long mac_tx_frame_ctrl_pause; 170 unsigned long mac_gmii_tx_proto_engine; 171 unsigned long mtl_rx_fifo_fill_level_full; 172 unsigned long mtl_rx_fifo_fill_above_thresh; 173 unsigned long mtl_rx_fifo_fill_below_thresh; 174 unsigned long mtl_rx_fifo_fill_level_empty; 175 unsigned long mtl_rx_fifo_read_ctrl_flush; 176 unsigned long mtl_rx_fifo_read_ctrl_read_data; 177 unsigned long mtl_rx_fifo_read_ctrl_status; 178 unsigned long mtl_rx_fifo_read_ctrl_idle; 179 unsigned long mtl_rx_fifo_ctrl_active; 180 unsigned long mac_rx_frame_ctrl_fifo; 181 unsigned long mac_gmii_rx_proto_engine; 182 /* TSO */ 183 unsigned long tx_tso_frames; 184 unsigned long tx_tso_nfrags; 185 /* EST */ 186 unsigned long mtl_est_cgce; 187 unsigned long mtl_est_hlbs; 188 unsigned long mtl_est_hlbf; 189 unsigned long mtl_est_btre; 190 unsigned long mtl_est_btrlm; 191 }; 192 193 /* Safety Feature statistics exposed by ethtool */ 194 struct stmmac_safety_stats { 195 unsigned long mac_errors[32]; 196 unsigned long mtl_errors[32]; 197 unsigned long dma_errors[32]; 198 }; 199 200 /* Number of fields in Safety Stats */ 201 #define STMMAC_SAFETY_FEAT_SIZE \ 202 (sizeof(struct stmmac_safety_stats) / sizeof(unsigned long)) 203 204 /* CSR Frequency Access Defines*/ 205 #define CSR_F_35M 35000000 206 #define CSR_F_60M 60000000 207 #define CSR_F_100M 100000000 208 #define CSR_F_150M 150000000 209 #define CSR_F_250M 250000000 210 #define CSR_F_300M 300000000 211 212 #define MAC_CSR_H_FRQ_MASK 0x20 213 214 #define HASH_TABLE_SIZE 64 215 #define PAUSE_TIME 0xffff 216 217 /* Flow Control defines */ 218 #define FLOW_OFF 0 219 #define FLOW_RX 1 220 #define FLOW_TX 2 221 #define FLOW_AUTO (FLOW_TX | FLOW_RX) 222 223 /* PCS defines */ 224 #define STMMAC_PCS_RGMII (1 << 0) 225 #define STMMAC_PCS_SGMII (1 << 1) 226 #define STMMAC_PCS_TBI (1 << 2) 227 #define STMMAC_PCS_RTBI (1 << 3) 228 229 #define SF_DMA_MODE 1 /* DMA STORE-AND-FORWARD Operation Mode */ 230 231 /* DAM HW feature register fields */ 232 #define DMA_HW_FEAT_MIISEL 0x00000001 /* 10/100 Mbps Support */ 233 #define DMA_HW_FEAT_GMIISEL 0x00000002 /* 1000 Mbps Support */ 234 #define DMA_HW_FEAT_HDSEL 0x00000004 /* Half-Duplex Support */ 235 #define DMA_HW_FEAT_EXTHASHEN 0x00000008 /* Expanded DA Hash Filter */ 236 #define DMA_HW_FEAT_HASHSEL 0x00000010 /* HASH Filter */ 237 #define DMA_HW_FEAT_ADDMAC 0x00000020 /* Multiple MAC Addr Reg */ 238 #define DMA_HW_FEAT_PCSSEL 0x00000040 /* PCS registers */ 239 #define DMA_HW_FEAT_L3L4FLTREN 0x00000080 /* Layer 3 & Layer 4 Feature */ 240 #define DMA_HW_FEAT_SMASEL 0x00000100 /* SMA(MDIO) Interface */ 241 #define DMA_HW_FEAT_RWKSEL 0x00000200 /* PMT Remote Wakeup */ 242 #define DMA_HW_FEAT_MGKSEL 0x00000400 /* PMT Magic Packet */ 243 #define DMA_HW_FEAT_MMCSEL 0x00000800 /* RMON Module */ 244 #define DMA_HW_FEAT_TSVER1SEL 0x00001000 /* Only IEEE 1588-2002 */ 245 #define DMA_HW_FEAT_TSVER2SEL 0x00002000 /* IEEE 1588-2008 PTPv2 */ 246 #define DMA_HW_FEAT_EEESEL 0x00004000 /* Energy Efficient Ethernet */ 247 #define DMA_HW_FEAT_AVSEL 0x00008000 /* AV Feature */ 248 #define DMA_HW_FEAT_TXCOESEL 0x00010000 /* Checksum Offload in Tx */ 249 #define DMA_HW_FEAT_RXTYP1COE 0x00020000 /* IP COE (Type 1) in Rx */ 250 #define DMA_HW_FEAT_RXTYP2COE 0x00040000 /* IP COE (Type 2) in Rx */ 251 #define DMA_HW_FEAT_RXFIFOSIZE 0x00080000 /* Rx FIFO > 2048 Bytes */ 252 #define DMA_HW_FEAT_RXCHCNT 0x00300000 /* No. additional Rx Channels */ 253 #define DMA_HW_FEAT_TXCHCNT 0x00c00000 /* No. additional Tx Channels */ 254 #define DMA_HW_FEAT_ENHDESSEL 0x01000000 /* Alternate Descriptor */ 255 /* Timestamping with Internal System Time */ 256 #define DMA_HW_FEAT_INTTSEN 0x02000000 257 #define DMA_HW_FEAT_FLEXIPPSEN 0x04000000 /* Flexible PPS Output */ 258 #define DMA_HW_FEAT_SAVLANINS 0x08000000 /* Source Addr or VLAN */ 259 #define DMA_HW_FEAT_ACTPHYIF 0x70000000 /* Active/selected PHY iface */ 260 #define DEFAULT_DMA_PBL 8 261 262 /* MSI defines */ 263 #define STMMAC_MSI_VEC_MAX 32 264 265 /* PCS status and mask defines */ 266 #define PCS_ANE_IRQ BIT(2) /* PCS Auto-Negotiation */ 267 #define PCS_LINK_IRQ BIT(1) /* PCS Link */ 268 #define PCS_RGSMIIIS_IRQ BIT(0) /* RGMII or SMII Interrupt */ 269 270 /* Max/Min RI Watchdog Timer count value */ 271 #define MAX_DMA_RIWT 0xff 272 #define MIN_DMA_RIWT 0x10 273 #define DEF_DMA_RIWT 0xa0 274 /* Tx coalesce parameters */ 275 #define STMMAC_COAL_TX_TIMER 1000 276 #define STMMAC_MAX_COAL_TX_TICK 100000 277 #define STMMAC_TX_MAX_FRAMES 256 278 #define STMMAC_TX_FRAMES 25 279 #define STMMAC_RX_FRAMES 0 280 281 /* Packets types */ 282 enum packets_types { 283 PACKET_AVCPQ = 0x1, /* AV Untagged Control packets */ 284 PACKET_PTPQ = 0x2, /* PTP Packets */ 285 PACKET_DCBCPQ = 0x3, /* DCB Control Packets */ 286 PACKET_UPQ = 0x4, /* Untagged Packets */ 287 PACKET_MCBCQ = 0x5, /* Multicast & Broadcast Packets */ 288 }; 289 290 /* Rx IPC status */ 291 enum rx_frame_status { 292 good_frame = 0x0, 293 discard_frame = 0x1, 294 csum_none = 0x2, 295 llc_snap = 0x4, 296 dma_own = 0x8, 297 rx_not_ls = 0x10, 298 }; 299 300 /* Tx status */ 301 enum tx_frame_status { 302 tx_done = 0x0, 303 tx_not_ls = 0x1, 304 tx_err = 0x2, 305 tx_dma_own = 0x4, 306 }; 307 308 enum dma_irq_status { 309 tx_hard_error = 0x1, 310 tx_hard_error_bump_tc = 0x2, 311 handle_rx = 0x4, 312 handle_tx = 0x8, 313 }; 314 315 enum dma_irq_dir { 316 DMA_DIR_RX = 0x1, 317 DMA_DIR_TX = 0x2, 318 DMA_DIR_RXTX = 0x3, 319 }; 320 321 enum request_irq_err { 322 REQ_IRQ_ERR_ALL, 323 REQ_IRQ_ERR_TX, 324 REQ_IRQ_ERR_RX, 325 REQ_IRQ_ERR_SFTY_UE, 326 REQ_IRQ_ERR_SFTY_CE, 327 REQ_IRQ_ERR_LPI, 328 REQ_IRQ_ERR_WOL, 329 REQ_IRQ_ERR_MAC, 330 REQ_IRQ_ERR_NO, 331 }; 332 333 /* EEE and LPI defines */ 334 #define CORE_IRQ_TX_PATH_IN_LPI_MODE (1 << 0) 335 #define CORE_IRQ_TX_PATH_EXIT_LPI_MODE (1 << 1) 336 #define CORE_IRQ_RX_PATH_IN_LPI_MODE (1 << 2) 337 #define CORE_IRQ_RX_PATH_EXIT_LPI_MODE (1 << 3) 338 339 /* FPE defines */ 340 #define FPE_EVENT_UNKNOWN 0 341 #define FPE_EVENT_TRSP BIT(0) 342 #define FPE_EVENT_TVER BIT(1) 343 #define FPE_EVENT_RRSP BIT(2) 344 #define FPE_EVENT_RVER BIT(3) 345 346 #define CORE_IRQ_MTL_RX_OVERFLOW BIT(8) 347 348 /* Physical Coding Sublayer */ 349 struct rgmii_adv { 350 unsigned int pause; 351 unsigned int duplex; 352 unsigned int lp_pause; 353 unsigned int lp_duplex; 354 }; 355 356 #define STMMAC_PCS_PAUSE 1 357 #define STMMAC_PCS_ASYM_PAUSE 2 358 359 /* DMA HW capabilities */ 360 struct dma_features { 361 unsigned int mbps_10_100; 362 unsigned int mbps_1000; 363 unsigned int half_duplex; 364 unsigned int hash_filter; 365 unsigned int multi_addr; 366 unsigned int pcs; 367 unsigned int sma_mdio; 368 unsigned int pmt_remote_wake_up; 369 unsigned int pmt_magic_frame; 370 unsigned int rmon; 371 /* IEEE 1588-2002 */ 372 unsigned int time_stamp; 373 /* IEEE 1588-2008 */ 374 unsigned int atime_stamp; 375 /* 802.3az - Energy-Efficient Ethernet (EEE) */ 376 unsigned int eee; 377 unsigned int av; 378 unsigned int hash_tb_sz; 379 unsigned int tsoen; 380 /* TX and RX csum */ 381 unsigned int tx_coe; 382 unsigned int rx_coe; 383 unsigned int rx_coe_type1; 384 unsigned int rx_coe_type2; 385 unsigned int rxfifo_over_2048; 386 /* TX and RX number of channels */ 387 unsigned int number_rx_channel; 388 unsigned int number_tx_channel; 389 /* TX and RX number of queues */ 390 unsigned int number_rx_queues; 391 unsigned int number_tx_queues; 392 /* PPS output */ 393 unsigned int pps_out_num; 394 /* Alternate (enhanced) DESC mode */ 395 unsigned int enh_desc; 396 /* TX and RX FIFO sizes */ 397 unsigned int tx_fifo_size; 398 unsigned int rx_fifo_size; 399 /* Automotive Safety Package */ 400 unsigned int asp; 401 /* RX Parser */ 402 unsigned int frpsel; 403 unsigned int frpbs; 404 unsigned int frpes; 405 unsigned int addr64; 406 unsigned int rssen; 407 unsigned int vlhash; 408 unsigned int sphen; 409 unsigned int vlins; 410 unsigned int dvlan; 411 unsigned int l3l4fnum; 412 unsigned int arpoffsel; 413 /* TSN Features */ 414 unsigned int estwid; 415 unsigned int estdep; 416 unsigned int estsel; 417 unsigned int fpesel; 418 unsigned int tbssel; 419 /* Numbers of Auxiliary Snapshot Inputs */ 420 unsigned int aux_snapshot_n; 421 }; 422 423 /* RX Buffer size must be multiple of 4/8/16 bytes */ 424 #define BUF_SIZE_16KiB 16368 425 #define BUF_SIZE_8KiB 8188 426 #define BUF_SIZE_4KiB 4096 427 #define BUF_SIZE_2KiB 2048 428 429 /* Power Down and WOL */ 430 #define PMT_NOT_SUPPORTED 0 431 #define PMT_SUPPORTED 1 432 433 /* Common MAC defines */ 434 #define MAC_CTRL_REG 0x00000000 /* MAC Control */ 435 #define MAC_ENABLE_TX 0x00000008 /* Transmitter Enable */ 436 #define MAC_ENABLE_RX 0x00000004 /* Receiver Enable */ 437 438 /* Default LPI timers */ 439 #define STMMAC_DEFAULT_LIT_LS 0x3E8 440 #define STMMAC_DEFAULT_TWT_LS 0x1E 441 #define STMMAC_ET_MAX 0xFFFFF 442 443 #define STMMAC_CHAIN_MODE 0x1 444 #define STMMAC_RING_MODE 0x2 445 446 #define JUMBO_LEN 9000 447 448 /* Receive Side Scaling */ 449 #define STMMAC_RSS_HASH_KEY_SIZE 40 450 #define STMMAC_RSS_MAX_TABLE_SIZE 256 451 452 /* VLAN */ 453 #define STMMAC_VLAN_NONE 0x0 454 #define STMMAC_VLAN_REMOVE 0x1 455 #define STMMAC_VLAN_INSERT 0x2 456 #define STMMAC_VLAN_REPLACE 0x3 457 458 extern const struct stmmac_desc_ops enh_desc_ops; 459 extern const struct stmmac_desc_ops ndesc_ops; 460 461 struct mac_device_info; 462 463 extern const struct stmmac_hwtimestamp stmmac_ptp; 464 extern const struct stmmac_mode_ops dwmac4_ring_mode_ops; 465 466 struct mac_link { 467 u32 speed_mask; 468 u32 speed10; 469 u32 speed100; 470 u32 speed1000; 471 u32 speed2500; 472 u32 duplex; 473 struct { 474 u32 speed2500; 475 u32 speed5000; 476 u32 speed10000; 477 } xgmii; 478 struct { 479 u32 speed25000; 480 u32 speed40000; 481 u32 speed50000; 482 u32 speed100000; 483 } xlgmii; 484 }; 485 486 struct mii_regs { 487 unsigned int addr; /* MII Address */ 488 unsigned int data; /* MII Data */ 489 unsigned int addr_shift; /* MII address shift */ 490 unsigned int reg_shift; /* MII reg shift */ 491 unsigned int addr_mask; /* MII address mask */ 492 unsigned int reg_mask; /* MII reg mask */ 493 unsigned int clk_csr_shift; 494 unsigned int clk_csr_mask; 495 }; 496 497 struct mac_device_info { 498 const struct stmmac_ops *mac; 499 const struct stmmac_desc_ops *desc; 500 const struct stmmac_dma_ops *dma; 501 const struct stmmac_mode_ops *mode; 502 const struct stmmac_hwtimestamp *ptp; 503 const struct stmmac_tc_ops *tc; 504 const struct stmmac_mmc_ops *mmc; 505 const struct mdio_xpcs_ops *xpcs; 506 struct mdio_xpcs_args xpcs_args; 507 struct mii_regs mii; /* MII register Addresses */ 508 struct mac_link link; 509 void __iomem *pcsr; /* vpointer to device CSRs */ 510 unsigned int multicast_filter_bins; 511 unsigned int unicast_filter_entries; 512 unsigned int mcast_bits_log2; 513 unsigned int rx_csum; 514 unsigned int pcs; 515 unsigned int pmt; 516 unsigned int ps; 517 unsigned int xlgmac; 518 unsigned int num_vlan; 519 u32 vlan_filter[32]; 520 unsigned int promisc; 521 bool vlan_fail_q_en; 522 u8 vlan_fail_q; 523 }; 524 525 struct stmmac_rx_routing { 526 u32 reg_mask; 527 u32 reg_shift; 528 }; 529 530 int dwmac100_setup(struct stmmac_priv *priv); 531 int dwmac1000_setup(struct stmmac_priv *priv); 532 int dwmac4_setup(struct stmmac_priv *priv); 533 int dwxgmac2_setup(struct stmmac_priv *priv); 534 int dwxlgmac2_setup(struct stmmac_priv *priv); 535 536 void stmmac_set_mac_addr(void __iomem *ioaddr, u8 addr[6], 537 unsigned int high, unsigned int low); 538 void stmmac_get_mac_addr(void __iomem *ioaddr, unsigned char *addr, 539 unsigned int high, unsigned int low); 540 void stmmac_set_mac(void __iomem *ioaddr, bool enable); 541 542 void stmmac_dwmac4_set_mac_addr(void __iomem *ioaddr, u8 addr[6], 543 unsigned int high, unsigned int low); 544 void stmmac_dwmac4_get_mac_addr(void __iomem *ioaddr, unsigned char *addr, 545 unsigned int high, unsigned int low); 546 void stmmac_dwmac4_set_mac(void __iomem *ioaddr, bool enable); 547 548 void dwmac_dma_flush_tx_fifo(void __iomem *ioaddr); 549 550 extern const struct stmmac_mode_ops ring_mode_ops; 551 extern const struct stmmac_mode_ops chain_mode_ops; 552 extern const struct stmmac_desc_ops dwmac4_desc_ops; 553 554 #endif /* __COMMON_H__ */ 555