LXR linux/drivers/net/ethernet/samsung/sxgbe/sxgbe

   1/* 10G controller driver for Samsung SoCs
   2 *
   3 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
   4 *              http://www.samsung.com
   5 *
   6 * Author: Siva Reddy Kallam <siva.kallam@samsung.com>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 */
  12
  13#ifndef __SXGBE_COMMON_H__
  14#define __SXGBE_COMMON_H__
  15
  16/* forward references */
  17struct sxgbe_desc_ops;
  18struct sxgbe_dma_ops;
  19struct sxgbe_mtl_ops;
  20
  21#define SXGBE_RESOURCE_NAME     "sam_sxgbeeth"
  22#define DRV_MODULE_VERSION      "November_2013"
  23
  24/* MAX HW feature words */
  25#define SXGBE_HW_WORDS 3
  26
  27#define SXGBE_RX_COE_NONE       0
  28
  29/* CSR Frequency Access Defines*/
  30#define SXGBE_CSR_F_150M        150000000
  31#define SXGBE_CSR_F_250M        250000000
  32#define SXGBE_CSR_F_300M        300000000
  33#define SXGBE_CSR_F_350M        350000000
  34#define SXGBE_CSR_F_400M        400000000
  35#define SXGBE_CSR_F_500M        500000000
  36
  37/* pause time */
  38#define SXGBE_PAUSE_TIME 0x200
  39
  40/* tx queues */
  41#define SXGBE_TX_QUEUES   8
  42#define SXGBE_RX_QUEUES   16
  43
  44/* Calculated based how much time does it take to fill 256KB Rx memory
  45 * at 10Gb speed at 156MHz clock rate and considered little less then
  46 * the actual value.
  47 */
  48#define SXGBE_MAX_DMA_RIWT      0x70
  49#define SXGBE_MIN_DMA_RIWT      0x01
  50
  51/* Tx coalesce parameters */
  52#define SXGBE_COAL_TX_TIMER     40000
  53#define SXGBE_MAX_COAL_TX_TICK  100000
  54#define SXGBE_TX_MAX_FRAMES     512
  55#define SXGBE_TX_FRAMES 128
  56
  57/* SXGBE TX FIFO is 8K, Rx FIFO is 16K */
  58#define BUF_SIZE_16KiB 16384
  59#define BUF_SIZE_8KiB 8192
  60#define BUF_SIZE_4KiB 4096
  61#define BUF_SIZE_2KiB 2048
  62
  63#define SXGBE_DEFAULT_LIT_LS    0x3E8
  64#define SXGBE_DEFAULT_TWT_LS    0x0
  65
  66/* Flow Control defines */
  67#define SXGBE_FLOW_OFF          0
  68#define SXGBE_FLOW_RX           1
  69#define SXGBE_FLOW_TX           2
  70#define SXGBE_FLOW_AUTO         (SXGBE_FLOW_TX | SXGBE_FLOW_RX)
  71
  72#define SF_DMA_MODE 1           /* DMA STORE-AND-FORWARD Operation Mode */
  73
  74/* errors */
  75#define RX_GMII_ERR             0x01
  76#define RX_WATCHDOG_ERR         0x02
  77#define RX_CRC_ERR              0x03
  78#define RX_GAINT_ERR            0x04
  79#define RX_IP_HDR_ERR           0x05
  80#define RX_PAYLOAD_ERR          0x06
  81#define RX_OVERFLOW_ERR         0x07
  82
  83/* pkt type */
  84#define RX_LEN_PKT              0x00
  85#define RX_MACCTL_PKT           0x01
  86#define RX_DCBCTL_PKT           0x02
  87#define RX_ARP_PKT              0x03
  88#define RX_OAM_PKT              0x04
  89#define RX_UNTAG_PKT            0x05
  90#define RX_OTHER_PKT            0x07
  91#define RX_SVLAN_PKT            0x08
  92#define RX_CVLAN_PKT            0x09
  93#define RX_DVLAN_OCVLAN_ICVLAN_PKT              0x0A
  94#define RX_DVLAN_OSVLAN_ISVLAN_PKT              0x0B
  95#define RX_DVLAN_OSVLAN_ICVLAN_PKT              0x0C
  96#define RX_DVLAN_OCVLAN_ISVLAN_PKT              0x0D
  97
  98#define RX_NOT_IP_PKT           0x00
  99#define RX_IPV4_TCP_PKT         0x01
 100#define RX_IPV4_UDP_PKT         0x02
 101#define RX_IPV4_ICMP_PKT        0x03
 102#define RX_IPV4_UNKNOWN_PKT     0x07
 103#define RX_IPV6_TCP_PKT         0x09
 104#define RX_IPV6_UDP_PKT         0x0A
 105#define RX_IPV6_ICMP_PKT        0x0B
 106#define RX_IPV6_UNKNOWN_PKT     0x0F
 107
 108#define RX_NO_PTP               0x00
 109#define RX_PTP_SYNC             0x01
 110#define RX_PTP_FOLLOW_UP        0x02
 111#define RX_PTP_DELAY_REQ        0x03
 112#define RX_PTP_DELAY_RESP       0x04
 113#define RX_PTP_PDELAY_REQ       0x05
 114#define RX_PTP_PDELAY_RESP      0x06
 115#define RX_PTP_PDELAY_FOLLOW_UP 0x07
 116#define RX_PTP_ANNOUNCE         0x08
 117#define RX_PTP_MGMT             0x09
 118#define RX_PTP_SIGNAL           0x0A
 119#define RX_PTP_RESV_MSG         0x0F
 120
 121/* EEE-LPI mode  flags*/
 122#define TX_ENTRY_LPI_MODE       0x10
 123#define TX_EXIT_LPI_MODE        0x20
 124#define RX_ENTRY_LPI_MODE       0x40
 125#define RX_EXIT_LPI_MODE        0x80
 126
 127/* EEE-LPI Interrupt status flag */
 128#define LPI_INT_STATUS          BIT(5)
 129
 130/* EEE-LPI Default timer values */
 131#define LPI_LINK_STATUS_TIMER   0x3E8
 132#define LPI_MAC_WAIT_TIMER      0x00
 133
 134/* EEE-LPI Control and status definitions */
 135#define LPI_CTRL_STATUS_TXA     BIT(19)
 136#define LPI_CTRL_STATUS_PLSDIS  BIT(18)
 137#define LPI_CTRL_STATUS_PLS     BIT(17)
 138#define LPI_CTRL_STATUS_LPIEN   BIT(16)
 139#define LPI_CTRL_STATUS_TXRSTP  BIT(11)
 140#define LPI_CTRL_STATUS_RXRSTP  BIT(10)
 141#define LPI_CTRL_STATUS_RLPIST  BIT(9)
 142#define LPI_CTRL_STATUS_TLPIST  BIT(8)
 143#define LPI_CTRL_STATUS_RLPIEX  BIT(3)
 144#define LPI_CTRL_STATUS_RLPIEN  BIT(2)
 145#define LPI_CTRL_STATUS_TLPIEX  BIT(1)
 146#define LPI_CTRL_STATUS_TLPIEN  BIT(0)
 147
 148enum dma_irq_status {
 149        tx_hard_error   = BIT(0),
 150        tx_bump_tc      = BIT(1),
 151        handle_tx       = BIT(2),
 152        rx_hard_error   = BIT(3),
 153        rx_bump_tc      = BIT(4),
 154        handle_rx       = BIT(5),
 155};
 156
 157#define NETIF_F_HW_VLAN_ALL     (NETIF_F_HW_VLAN_CTAG_RX |      \
 158                                 NETIF_F_HW_VLAN_STAG_RX |      \
 159                                 NETIF_F_HW_VLAN_CTAG_TX |      \
 160                                 NETIF_F_HW_VLAN_STAG_TX |      \
 161                                 NETIF_F_HW_VLAN_CTAG_FILTER |  \
 162                                 NETIF_F_HW_VLAN_STAG_FILTER)
 163
 164/* MMC control defines */
 165#define SXGBE_MMC_CTRL_CNT_FRZ  0x00000008
 166
 167/* SXGBE HW ADDR regs */
 168#define SXGBE_ADDR_HIGH(reg)    (((reg > 15) ? 0x00000800 : 0x00000040) + \
 169                                 (reg * 8))
 170#define SXGBE_ADDR_LOW(reg)     (((reg > 15) ? 0x00000804 : 0x00000044) + \
 171                                 (reg * 8))
 172#define SXGBE_MAX_PERFECT_ADDRESSES 32 /* Maximum unicast perfect filtering */
 173#define SXGBE_FRAME_FILTER       0x00000004      /* Frame Filter */
 174
 175/* SXGBE Frame Filter defines */
 176#define SXGBE_FRAME_FILTER_PR    0x00000001      /* Promiscuous Mode */
 177#define SXGBE_FRAME_FILTER_HUC   0x00000002      /* Hash Unicast */
 178#define SXGBE_FRAME_FILTER_HMC   0x00000004      /* Hash Multicast */
 179#define SXGBE_FRAME_FILTER_DAIF  0x00000008      /* DA Inverse Filtering */
 180#define SXGBE_FRAME_FILTER_PM    0x00000010      /* Pass all multicast */
 181#define SXGBE_FRAME_FILTER_DBF   0x00000020      /* Disable Broadcast frames */
 182#define SXGBE_FRAME_FILTER_SAIF  0x00000100      /* Inverse Filtering */
 183#define SXGBE_FRAME_FILTER_SAF   0x00000200      /* Source Address Filter */
 184#define SXGBE_FRAME_FILTER_HPF   0x00000400      /* Hash or perfect Filter */
 185#define SXGBE_FRAME_FILTER_RA    0x80000000      /* Receive all mode */
 186
 187#define SXGBE_HASH_TABLE_SIZE    64
 188#define SXGBE_HASH_HIGH          0x00000008      /* Multicast Hash Table High */
 189#define SXGBE_HASH_LOW           0x0000000c      /* Multicast Hash Table Low */
 190
 191#define SXGBE_HI_REG_AE          0x80000000
 192
 193/* Minimum and maximum MTU */
 194#define MIN_MTU         68
 195#define MAX_MTU         9000
 196
 197#define SXGBE_FOR_EACH_QUEUE(max_queues, queue_num)                     \
 198        for (queue_num = 0; queue_num < max_queues; queue_num++)
 199
 200#define DRV_VERSION "1.0.0"
 201
 202#define SXGBE_MAX_RX_CHANNELS   16
 203#define SXGBE_MAX_TX_CHANNELS   16
 204
 205#define START_MAC_REG_OFFSET    0x0000
 206#define MAX_MAC_REG_OFFSET      0x0DFC
 207#define START_MTL_REG_OFFSET    0x1000
 208#define MAX_MTL_REG_OFFSET      0x18FC
 209#define START_DMA_REG_OFFSET    0x3000
 210#define MAX_DMA_REG_OFFSET      0x38FC
 211
 212#define REG_SPACE_SIZE          0x2000
 213
 214/* sxgbe statistics counters */
 215struct sxgbe_extra_stats {
 216        /* TX/RX IRQ events */
 217        unsigned long tx_underflow_irq;
 218        unsigned long tx_process_stopped_irq;
 219        unsigned long tx_ctxt_desc_err;
 220        unsigned long tx_threshold;
 221        unsigned long rx_threshold;
 222        unsigned long tx_pkt_n;
 223        unsigned long rx_pkt_n;
 224        unsigned long normal_irq_n;
 225        unsigned long tx_normal_irq_n;
 226        unsigned long rx_normal_irq_n;
 227        unsigned long napi_poll;
 228        unsigned long tx_clean;
 229        unsigned long tx_reset_ic_bit;
 230        unsigned long rx_process_stopped_irq;
 231        unsigned long rx_underflow_irq;
 232
 233        /* Bus access errors */
 234        unsigned long fatal_bus_error_irq;
 235        unsigned long tx_read_transfer_err;
 236        unsigned long tx_write_transfer_err;
 237        unsigned long tx_desc_access_err;
 238        unsigned long tx_buffer_access_err;
 239        unsigned long tx_data_transfer_err;
 240        unsigned long rx_read_transfer_err;
 241        unsigned long rx_write_transfer_err;
 242        unsigned long rx_desc_access_err;
 243        unsigned long rx_buffer_access_err;
 244        unsigned long rx_data_transfer_err;
 245
 246        /* EEE-LPI stats */
 247        unsigned long tx_lpi_entry_n;
 248        unsigned long tx_lpi_exit_n;
 249        unsigned long rx_lpi_entry_n;
 250        unsigned long rx_lpi_exit_n;
 251        unsigned long eee_wakeup_error_n;
 252
 253        /* RX specific */
 254        /* L2 error */
 255        unsigned long rx_code_gmii_err;
 256        unsigned long rx_watchdog_err;
 257        unsigned long rx_crc_err;
 258        unsigned long rx_gaint_pkt_err;
 259        unsigned long ip_hdr_err;
 260        unsigned long ip_payload_err;
 261        unsigned long overflow_error;
 262
 263        /* L2 Pkt type */
 264        unsigned long len_pkt;
 265        unsigned long mac_ctl_pkt;
 266        unsigned long dcb_ctl_pkt;
 267        unsigned long arp_pkt;
 268        unsigned long oam_pkt;
 269        unsigned long untag_okt;
 270        unsigned long other_pkt;
 271        unsigned long svlan_tag_pkt;
 272        unsigned long cvlan_tag_pkt;
 273        unsigned long dvlan_ocvlan_icvlan_pkt;
 274        unsigned long dvlan_osvlan_isvlan_pkt;
 275        unsigned long dvlan_osvlan_icvlan_pkt;
 276        unsigned long dvan_ocvlan_icvlan_pkt;
 277
 278        /* L3/L4 Pkt type */
 279        unsigned long not_ip_pkt;
 280        unsigned long ip4_tcp_pkt;
 281        unsigned long ip4_udp_pkt;
 282        unsigned long ip4_icmp_pkt;
 283        unsigned long ip4_unknown_pkt;
 284        unsigned long ip6_tcp_pkt;
 285        unsigned long ip6_udp_pkt;
 286        unsigned long ip6_icmp_pkt;
 287        unsigned long ip6_unknown_pkt;
 288
 289        /* Filter specific */
 290        unsigned long vlan_filter_match;
 291        unsigned long sa_filter_fail;
 292        unsigned long da_filter_fail;
 293        unsigned long hash_filter_pass;
 294        unsigned long l3_filter_match;
 295        unsigned long l4_filter_match;
 296
 297        /* RX context specific */
 298        unsigned long timestamp_dropped;
 299        unsigned long rx_msg_type_no_ptp;
 300        unsigned long rx_ptp_type_sync;
 301        unsigned long rx_ptp_type_follow_up;
 302        unsigned long rx_ptp_type_delay_req;
 303        unsigned long rx_ptp_type_delay_resp;
 304        unsigned long rx_ptp_type_pdelay_req;
 305        unsigned long rx_ptp_type_pdelay_resp;
 306        unsigned long rx_ptp_type_pdelay_follow_up;
 307        unsigned long rx_ptp_announce;
 308        unsigned long rx_ptp_mgmt;
 309        unsigned long rx_ptp_signal;
 310        unsigned long rx_ptp_resv_msg_type;
 311};
 312
 313struct mac_link {
 314        int port;
 315        int duplex;
 316        int speed;
 317};
 318
 319struct mii_regs {
 320        unsigned int addr;      /* MII Address */
 321        unsigned int data;      /* MII Data */
 322};
 323
 324struct sxgbe_core_ops {
 325        /* MAC core initialization */
 326        void (*core_init)(void __iomem *ioaddr);
 327        /* Dump MAC registers */
 328        void (*dump_regs)(void __iomem *ioaddr);
 329        /* Handle extra events on specific interrupts hw dependent */
 330        int (*host_irq_status)(void __iomem *ioaddr,
 331                               struct sxgbe_extra_stats *x);
 332        /* Set power management mode (e.g. magic frame) */
 333        void (*pmt)(void __iomem *ioaddr, unsigned long mode);
 334        /* Set/Get Unicast MAC addresses */
 335        void (*set_umac_addr)(void __iomem *ioaddr, unsigned char *addr,
 336                              unsigned int reg_n);
 337        void (*get_umac_addr)(void __iomem *ioaddr, unsigned char *addr,
 338                              unsigned int reg_n);
 339        void (*enable_rx)(void __iomem *ioaddr, bool enable);
 340        void (*enable_tx)(void __iomem *ioaddr, bool enable);
 341
 342        /* controller version specific operations */
 343        int (*get_controller_version)(void __iomem *ioaddr);
 344
 345        /* If supported then get the optional core features */
 346        unsigned int (*get_hw_feature)(void __iomem *ioaddr,
 347                                       unsigned char feature_index);
 348        /* adjust SXGBE speed */
 349        void (*set_speed)(void __iomem *ioaddr, unsigned char speed);
 350
 351        /* EEE-LPI specific operations */
 352        void (*set_eee_mode)(void __iomem *ioaddr);
 353        void (*reset_eee_mode)(void __iomem *ioaddr);
 354        void (*set_eee_timer)(void __iomem *ioaddr, const int ls,
 355                              const int tw);
 356        void (*set_eee_pls)(void __iomem *ioaddr, const int link);
 357
 358        /* Enable disable checksum offload operations */
 359        void (*enable_rx_csum)(void __iomem *ioaddr);
 360        void (*disable_rx_csum)(void __iomem *ioaddr);
 361        void (*enable_rxqueue)(void __iomem *ioaddr, int queue_num);
 362        void (*disable_rxqueue)(void __iomem *ioaddr, int queue_num);
 363};
 364
 365const struct sxgbe_core_ops *sxgbe_get_core_ops(void);
 366
 367struct sxgbe_ops {
 368        const struct sxgbe_core_ops *mac;
 369        const struct sxgbe_desc_ops *desc;
 370        const struct sxgbe_dma_ops *dma;
 371        const struct sxgbe_mtl_ops *mtl;
 372        struct mii_regs mii;    /* MII register Addresses */
 373        struct mac_link link;
 374        unsigned int ctrl_uid;
 375        unsigned int ctrl_id;
 376};
 377
 378/* SXGBE private data structures */
 379struct sxgbe_tx_queue {
 380        unsigned int irq_no;
 381        struct sxgbe_priv_data *priv_ptr;
 382        struct sxgbe_tx_norm_desc *dma_tx;
 383        dma_addr_t dma_tx_phy;
 384        dma_addr_t *tx_skbuff_dma;
 385        struct sk_buff **tx_skbuff;
 386        struct timer_list txtimer;
 387        unsigned int cur_tx;
 388        unsigned int dirty_tx;
 389        u32 tx_count_frames;
 390        u32 tx_coal_frames;
 391        u32 tx_coal_timer;
 392        int hwts_tx_en;
 393        u16 prev_mss;
 394        u8 queue_no;
 395};
 396
 397struct sxgbe_rx_queue {
 398        struct sxgbe_priv_data *priv_ptr;
 399        struct sxgbe_rx_norm_desc *dma_rx;
 400        struct sk_buff **rx_skbuff;
 401        unsigned int cur_rx;
 402        unsigned int dirty_rx;
 403        unsigned int irq_no;
 404        u32 rx_riwt;
 405        dma_addr_t *rx_skbuff_dma;
 406        dma_addr_t dma_rx_phy;
 407        u8 queue_no;
 408};
 409
 410/* SXGBE HW capabilities */
 411struct sxgbe_hw_features {
 412        /****** CAP [0] *******/
 413        unsigned int pmt_remote_wake_up;
 414        unsigned int pmt_magic_frame;
 415        /* IEEE 1588-2008 */
 416        unsigned int atime_stamp;
 417
 418        unsigned int eee;
 419
 420        unsigned int tx_csum_offload;
 421        unsigned int rx_csum_offload;
 422        unsigned int multi_macaddr;
 423        unsigned int tstamp_srcselect;
 424        unsigned int sa_vlan_insert;
 425
 426        /****** CAP [1] *******/
 427        unsigned int rxfifo_size;
 428        unsigned int txfifo_size;
 429        unsigned int atstmap_hword;
 430        unsigned int dcb_enable;
 431        unsigned int splithead_enable;
 432        unsigned int tcpseg_offload;
 433        unsigned int debug_mem;
 434        unsigned int rss_enable;
 435        unsigned int hash_tsize;
 436        unsigned int l3l4_filer_size;
 437
 438        /* This value is in bytes and
 439         * as mentioned in HW features
 440         * of SXGBE data book
 441         */
 442        unsigned int rx_mtl_qsize;
 443        unsigned int tx_mtl_qsize;
 444
 445        /****** CAP [2] *******/
 446        /* TX and RX number of channels */
 447        unsigned int rx_mtl_queues;
 448        unsigned int tx_mtl_queues;
 449        unsigned int rx_dma_channels;
 450        unsigned int tx_dma_channels;
 451        unsigned int pps_output_count;
 452        unsigned int aux_input_count;
 453};
 454
 455struct sxgbe_priv_data {
 456        /* DMA descriptos */
 457        struct sxgbe_tx_queue *txq[SXGBE_TX_QUEUES];
 458        struct sxgbe_rx_queue *rxq[SXGBE_RX_QUEUES];
 459        u8 cur_rx_qnum;
 460
 461        unsigned int dma_tx_size;
 462        unsigned int dma_rx_size;
 463        unsigned int dma_buf_sz;
 464        u32 rx_riwt;
 465
 466        struct napi_struct napi;
 467
 468        void __iomem *ioaddr;
 469        struct net_device *dev;
 470        struct device *device;
 471        struct sxgbe_ops *hw;   /* sxgbe specific ops */
 472        int no_csum_insertion;
 473        int irq;
 474        int rxcsum_insertion;
 475        spinlock_t stats_lock;  /* lock for tx/rx statatics */
 476
 477        int oldlink;
 478        int speed;
 479        int oldduplex;
 480        struct mii_bus *mii;
 481        int mii_irq[PHY_MAX_ADDR];
 482        u8 rx_pause;
 483        u8 tx_pause;
 484
 485        struct sxgbe_extra_stats xstats;
 486        struct sxgbe_plat_data *plat;
 487        struct sxgbe_hw_features hw_cap;
 488
 489        u32 msg_enable;
 490
 491        struct clk *sxgbe_clk;
 492        int clk_csr;
 493        unsigned int mode;
 494        unsigned int default_addend;
 495
 496        /* advanced time stamp support */
 497        u32 adv_ts;
 498        int use_riwt;
 499        struct ptp_clock *ptp_clock;
 500
 501        /* tc control */
 502        int tx_tc;
 503        int rx_tc;
 504        /* EEE-LPI specific members */
 505        struct timer_list eee_ctrl_timer;
 506        bool tx_path_in_lpi_mode;
 507        int lpi_irq;
 508        int eee_enabled;
 509        int eee_active;
 510        int tx_lpi_timer;
 511};
 512
 513/* Function prototypes */
 514struct sxgbe_priv_data *sxgbe_drv_probe(struct device *device,
 515                                        struct sxgbe_plat_data *plat_dat,
 516                                        void __iomem *addr);
 517int sxgbe_drv_remove(struct net_device *ndev);
 518void sxgbe_set_ethtool_ops(struct net_device *netdev);
 519int sxgbe_mdio_unregister(struct net_device *ndev);
 520int sxgbe_mdio_register(struct net_device *ndev);
 521int sxgbe_register_platform(void);
 522void sxgbe_unregister_platform(void);
 523
 524#ifdef CONFIG_PM
 525int sxgbe_suspend(struct net_device *ndev);
 526int sxgbe_resume(struct net_device *ndev);
 527int sxgbe_freeze(struct net_device *ndev);
 528int sxgbe_restore(struct net_device *ndev);
 529#endif /* CONFIG_PM */
 530
 531const struct sxgbe_mtl_ops *sxgbe_get_mtl_ops(void);
 532
 533void sxgbe_disable_eee_mode(struct sxgbe_priv_data * const priv);
 534bool sxgbe_eee_init(struct sxgbe_priv_data * const priv);
 535#endif /* __SXGBE_COMMON_H__ */
 536