drivers/net/ethernet/altera/altera_tse.h

   1 /* Altera Triple-Speed Ethernet MAC driver
   2  * Copyright (C) 2008-2014 Altera Corporation. All rights reserved
   3  *
   4  * Contributors:
   5  *   Dalon Westergreen
   6  *   Thomas Chou
   7  *   Ian Abbott
   8  *   Yuriy Kozlov
   9  *   Tobias Klauser
  10  *   Andriy Smolskyy
  11  *   Roman Bulgakov
  12  *   Dmytro Mytarchuk
  13  *   Matthew Gerlach
  14  *
  15  * Original driver contributed by SLS.
  16  * Major updates contributed by GlobalLogic
  17  *
  18  * This program is free software; you can redistribute it and/or modify it
  19  * under the terms and conditions of the GNU General Public License,
  20  * version 2, as published by the Free Software Foundation.
  21  *
  22  * This program is distributed in the hope it will be useful, but WITHOUT
  23  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  24  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  25  * more details.
  26  *
  27  * You should have received a copy of the GNU General Public License along with
  28  * this program.  If not, see <http://www.gnu.org/licenses/>.
  29  */
  30
  31 #ifndef __ALTERA_TSE_H__
  32 #define __ALTERA_TSE_H__
  33
  34 #define ALTERA_TSE_RESOURCE_NAME        "altera_tse"
  35
  36 #include <linux/bitops.h>
  37 #include <linux/if_vlan.h>
  38 #include <linux/list.h>
  39 #include <linux/netdevice.h>
  40 #include <linux/phy.h>
  41
  42 #define ALTERA_TSE_SW_RESET_WATCHDOG_CNTR       10000
  43 #define ALTERA_TSE_MAC_FIFO_WIDTH               4       /* TX/RX FIFO width in
  44                                                          * bytes
  45                                                          */
  46 /* Rx FIFO default settings */
  47 #define ALTERA_TSE_RX_SECTION_EMPTY     16
  48 #define ALTERA_TSE_RX_SECTION_FULL      0
  49 #define ALTERA_TSE_RX_ALMOST_EMPTY      8
  50 #define ALTERA_TSE_RX_ALMOST_FULL       8
  51
  52 /* Tx FIFO default settings */
  53 #define ALTERA_TSE_TX_SECTION_EMPTY     16
  54 #define ALTERA_TSE_TX_SECTION_FULL      0
  55 #define ALTERA_TSE_TX_ALMOST_EMPTY      8
  56 #define ALTERA_TSE_TX_ALMOST_FULL       3
  57
  58 /* MAC function configuration default settings */
  59 #define ALTERA_TSE_TX_IPG_LENGTH        12
  60
  61 #define ALTERA_TSE_PAUSE_QUANTA         0xffff
  62
  63 #define GET_BIT_VALUE(v, bit)           (((v) >> (bit)) & 0x1)
  64
  65 /* MAC Command_Config Register Bit Definitions
  66  */
  67 #define MAC_CMDCFG_TX_ENA                       BIT(0)
  68 #define MAC_CMDCFG_RX_ENA                       BIT(1)
  69 #define MAC_CMDCFG_XON_GEN                      BIT(2)
  70 #define MAC_CMDCFG_ETH_SPEED                    BIT(3)
  71 #define MAC_CMDCFG_PROMIS_EN                    BIT(4)
  72 #define MAC_CMDCFG_PAD_EN                       BIT(5)
  73 #define MAC_CMDCFG_CRC_FWD                      BIT(6)
  74 #define MAC_CMDCFG_PAUSE_FWD                    BIT(7)
  75 #define MAC_CMDCFG_PAUSE_IGNORE                 BIT(8)
  76 #define MAC_CMDCFG_TX_ADDR_INS                  BIT(9)
  77 #define MAC_CMDCFG_HD_ENA                       BIT(10)
  78 #define MAC_CMDCFG_EXCESS_COL                   BIT(11)
  79 #define MAC_CMDCFG_LATE_COL                     BIT(12)
  80 #define MAC_CMDCFG_SW_RESET                     BIT(13)
  81 #define MAC_CMDCFG_MHASH_SEL                    BIT(14)
  82 #define MAC_CMDCFG_LOOP_ENA                     BIT(15)
  83 #define MAC_CMDCFG_TX_ADDR_SEL(v)               (((v) & 0x7) << 16)
  84 #define MAC_CMDCFG_MAGIC_ENA                    BIT(19)
  85 #define MAC_CMDCFG_SLEEP                        BIT(20)
  86 #define MAC_CMDCFG_WAKEUP                       BIT(21)
  87 #define MAC_CMDCFG_XOFF_GEN                     BIT(22)
  88 #define MAC_CMDCFG_CNTL_FRM_ENA                 BIT(23)
  89 #define MAC_CMDCFG_NO_LGTH_CHECK                BIT(24)
  90 #define MAC_CMDCFG_ENA_10                       BIT(25)
  91 #define MAC_CMDCFG_RX_ERR_DISC                  BIT(26)
  92 #define MAC_CMDCFG_DISABLE_READ_TIMEOUT         BIT(27)
  93 #define MAC_CMDCFG_CNT_RESET                    BIT(31)
  94
  95 #define MAC_CMDCFG_TX_ENA_GET(v)                GET_BIT_VALUE(v, 0)
  96 #define MAC_CMDCFG_RX_ENA_GET(v)                GET_BIT_VALUE(v, 1)
  97 #define MAC_CMDCFG_XON_GEN_GET(v)               GET_BIT_VALUE(v, 2)
  98 #define MAC_CMDCFG_ETH_SPEED_GET(v)             GET_BIT_VALUE(v, 3)
  99 #define MAC_CMDCFG_PROMIS_EN_GET(v)             GET_BIT_VALUE(v, 4)
 100 #define MAC_CMDCFG_PAD_EN_GET(v)                GET_BIT_VALUE(v, 5)
 101 #define MAC_CMDCFG_CRC_FWD_GET(v)               GET_BIT_VALUE(v, 6)
 102 #define MAC_CMDCFG_PAUSE_FWD_GET(v)             GET_BIT_VALUE(v, 7)
 103 #define MAC_CMDCFG_PAUSE_IGNORE_GET(v)          GET_BIT_VALUE(v, 8)
 104 #define MAC_CMDCFG_TX_ADDR_INS_GET(v)           GET_BIT_VALUE(v, 9)
 105 #define MAC_CMDCFG_HD_ENA_GET(v)                GET_BIT_VALUE(v, 10)
 106 #define MAC_CMDCFG_EXCESS_COL_GET(v)            GET_BIT_VALUE(v, 11)
 107 #define MAC_CMDCFG_LATE_COL_GET(v)              GET_BIT_VALUE(v, 12)
 108 #define MAC_CMDCFG_SW_RESET_GET(v)              GET_BIT_VALUE(v, 13)
 109 #define MAC_CMDCFG_MHASH_SEL_GET(v)             GET_BIT_VALUE(v, 14)
 110 #define MAC_CMDCFG_LOOP_ENA_GET(v)              GET_BIT_VALUE(v, 15)
 111 #define MAC_CMDCFG_TX_ADDR_SEL_GET(v)           (((v) >> 16) & 0x7)
 112 #define MAC_CMDCFG_MAGIC_ENA_GET(v)             GET_BIT_VALUE(v, 19)
 113 #define MAC_CMDCFG_SLEEP_GET(v)                 GET_BIT_VALUE(v, 20)
 114 #define MAC_CMDCFG_WAKEUP_GET(v)                GET_BIT_VALUE(v, 21)
 115 #define MAC_CMDCFG_XOFF_GEN_GET(v)              GET_BIT_VALUE(v, 22)
 116 #define MAC_CMDCFG_CNTL_FRM_ENA_GET(v)          GET_BIT_VALUE(v, 23)
 117 #define MAC_CMDCFG_NO_LGTH_CHECK_GET(v)         GET_BIT_VALUE(v, 24)
 118 #define MAC_CMDCFG_ENA_10_GET(v)                GET_BIT_VALUE(v, 25)
 119 #define MAC_CMDCFG_RX_ERR_DISC_GET(v)           GET_BIT_VALUE(v, 26)
 120 #define MAC_CMDCFG_DISABLE_READ_TIMEOUT_GET(v)  GET_BIT_VALUE(v, 27)
 121 #define MAC_CMDCFG_CNT_RESET_GET(v)             GET_BIT_VALUE(v, 31)
 122
 123 /* SGMII PCS register addresses
 124  */
 125 #define SGMII_PCS_SCRATCH       0x10
 126 #define SGMII_PCS_REV           0x11
 127 #define SGMII_PCS_LINK_TIMER_0  0x12
 128 #define SGMII_PCS_LINK_TIMER_1  0x13
 129 #define SGMII_PCS_IF_MODE       0x14
 130 #define SGMII_PCS_DIS_READ_TO   0x15
 131 #define SGMII_PCS_READ_TO       0x16
 132 #define SGMII_PCS_SW_RESET_TIMEOUT 100 /* usecs */
 133
 134 /* MDIO registers within MAC register Space
 135  */
 136 struct altera_tse_mdio {
 137         u32 control;    /* PHY device operation control register */
 138         u32 status;     /* PHY device operation status register */
 139         u32 phy_id1;    /* Bits 31:16 of PHY identifier */
 140         u32 phy_id2;    /* Bits 15:0 of PHY identifier */
 141         u32 auto_negotiation_advertisement;     /* Auto-negotiation
 142                                                          * advertisement
 143                                                          * register
 144                                                          */
 145         u32 remote_partner_base_page_ability;
 146
 147         u32 reg6;
 148         u32 reg7;
 149         u32 reg8;
 150         u32 reg9;
 151         u32 rega;
 152         u32 regb;
 153         u32 regc;
 154         u32 regd;
 155         u32 rege;
 156         u32 regf;
 157         u32 reg10;
 158         u32 reg11;
 159         u32 reg12;
 160         u32 reg13;
 161         u32 reg14;
 162         u32 reg15;
 163         u32 reg16;
 164         u32 reg17;
 165         u32 reg18;
 166         u32 reg19;
 167         u32 reg1a;
 168         u32 reg1b;
 169         u32 reg1c;
 170         u32 reg1d;
 171         u32 reg1e;
 172         u32 reg1f;
 173 };
 174
 175 /* MAC register Space. Note that some of these registers may or may not be
 176  * present depending upon options chosen by the user when the core was
 177  * configured and built. Please consult the Altera Triple Speed Ethernet User
 178  * Guide for details.
 179  */
 180 struct altera_tse_mac {
 181         /* Bits 15:0: MegaCore function revision (0x0800). Bit 31:16: Customer
 182          * specific revision
 183          */
 184         u32 megacore_revision;
 185         /* Provides a memory location for user applications to test the device
 186          * memory operation.
 187          */
 188         u32 scratch_pad;
 189         /* The host processor uses this register to control and configure the
 190          * MAC block
 191          */
 192         u32 command_config;
 193         /* 32-bit primary MAC address word 0 bits 0 to 31 of the primary
 194          * MAC address
 195          */
 196         u32 mac_addr_0;
 197         /* 32-bit primary MAC address word 1 bits 32 to 47 of the primary
 198          * MAC address
 199          */
 200         u32 mac_addr_1;
 201         /* 14-bit maximum frame length. The MAC receive logic */
 202         u32 frm_length;
 203         /* The pause quanta is used in each pause frame sent to a remote
 204          * Ethernet device, in increments of 512 Ethernet bit times
 205          */
 206         u32 pause_quanta;
 207         /* 12-bit receive FIFO section-empty threshold */
 208         u32 rx_section_empty;
 209         /* 12-bit receive FIFO section-full threshold */
 210         u32 rx_section_full;
 211         /* 12-bit transmit FIFO section-empty threshold */
 212         u32 tx_section_empty;
 213         /* 12-bit transmit FIFO section-full threshold */
 214         u32 tx_section_full;
 215         /* 12-bit receive FIFO almost-empty threshold */
 216         u32 rx_almost_empty;
 217         /* 12-bit receive FIFO almost-full threshold */
 218         u32 rx_almost_full;
 219         /* 12-bit transmit FIFO almost-empty threshold */
 220         u32 tx_almost_empty;
 221         /* 12-bit transmit FIFO almost-full threshold */
 222         u32 tx_almost_full;
 223         /* MDIO address of PHY Device 0. Bits 0 to 4 hold a 5-bit PHY address */
 224         u32 mdio_phy0_addr;
 225         /* MDIO address of PHY Device 1. Bits 0 to 4 hold a 5-bit PHY address */
 226         u32 mdio_phy1_addr;
 227
 228         /* Bit[15:0]—16-bit holdoff quanta */
 229         u32 holdoff_quant;
 230
 231         /* only if 100/1000 BaseX PCS, reserved otherwise */
 232         u32 reserved1[5];
 233
 234         /* Minimum IPG between consecutive transmit frame in terms of bytes */
 235         u32 tx_ipg_length;
 236
 237         /* IEEE 802.3 oEntity Managed Object Support */
 238
 239         /* The MAC addresses */
 240         u32 mac_id_1;
 241         u32 mac_id_2;
 242
 243         /* Number of frames transmitted without error including pause frames */
 244         u32 frames_transmitted_ok;
 245         /* Number of frames received without error including pause frames */
 246         u32 frames_received_ok;
 247         /* Number of frames received with a CRC error */
 248         u32 frames_check_sequence_errors;
 249         /* Frame received with an alignment error */
 250         u32 alignment_errors;
 251         /* Sum of payload and padding octets of frames transmitted without
 252          * error
 253          */
 254         u32 octets_transmitted_ok;
 255         /* Sum of payload and padding octets of frames received without error */
 256         u32 octets_received_ok;
 257
 258         /* IEEE 802.3 oPausedEntity Managed Object Support */
 259
 260         /* Number of transmitted pause frames */
 261         u32 tx_pause_mac_ctrl_frames;
 262         /* Number of Received pause frames */
 263         u32 rx_pause_mac_ctrl_frames;
 264
 265         /* IETF MIB (MIB-II) Object Support */
 266
 267         /* Number of frames received with error */
 268         u32 if_in_errors;
 269         /* Number of frames transmitted with error */
 270         u32 if_out_errors;
 271         /* Number of valid received unicast frames */
 272         u32 if_in_ucast_pkts;
 273         /* Number of valid received multicasts frames (without pause) */
 274         u32 if_in_multicast_pkts;
 275         /* Number of valid received broadcast frames */
 276         u32 if_in_broadcast_pkts;
 277         u32 if_out_discards;
 278         /* The number of valid unicast frames transmitted */
 279         u32 if_out_ucast_pkts;
 280         /* The number of valid multicast frames transmitted,
 281          * excluding pause frames
 282          */
 283         u32 if_out_multicast_pkts;
 284         u32 if_out_broadcast_pkts;
 285
 286         /* IETF RMON MIB Object Support */
 287
 288         /* Counts the number of dropped packets due to internal errors
 289          * of the MAC client.
 290          */
 291         u32 ether_stats_drop_events;
 292         /* Total number of bytes received. Good and bad frames. */
 293         u32 ether_stats_octets;
 294         /* Total number of packets received. Counts good and bad packets. */
 295         u32 ether_stats_pkts;
 296         /* Number of packets received with less than 64 bytes. */
 297         u32 ether_stats_undersize_pkts;
 298         /* The number of frames received that are longer than the
 299          * value configured in the frm_length register
 300          */
 301         u32 ether_stats_oversize_pkts;
 302         /* Number of received packet with 64 bytes */
 303         u32 ether_stats_pkts_64_octets;
 304         /* Frames (good and bad) with 65 to 127 bytes */
 305         u32 ether_stats_pkts_65to127_octets;
 306         /* Frames (good and bad) with 128 to 255 bytes */
 307         u32 ether_stats_pkts_128to255_octets;
 308         /* Frames (good and bad) with 256 to 511 bytes */
 309         u32 ether_stats_pkts_256to511_octets;
 310         /* Frames (good and bad) with 512 to 1023 bytes */
 311         u32 ether_stats_pkts_512to1023_octets;
 312         /* Frames (good and bad) with 1024 to 1518 bytes */
 313         u32 ether_stats_pkts_1024to1518_octets;
 314
 315         /* Any frame length from 1519 to the maximum length configured in the
 316          * frm_length register, if it is greater than 1518
 317          */
 318         u32 ether_stats_pkts_1519tox_octets;
 319         /* Too long frames with CRC error */
 320         u32 ether_stats_jabbers;
 321         /* Too short frames with CRC error */
 322         u32 ether_stats_fragments;
 323
 324         u32 reserved2;
 325
 326         /* FIFO control register */
 327         u32 tx_cmd_stat;
 328         u32 rx_cmd_stat;
 329
 330         /* Extended Statistics Counters */
 331         u32 msb_octets_transmitted_ok;
 332         u32 msb_octets_received_ok;
 333         u32 msb_ether_stats_octets;
 334
 335         u32 reserved3;
 336
 337         /* Multicast address resolution table, mapped in the controller address
 338          * space
 339          */
 340         u32 hash_table[64];
 341
 342         /* Registers 0 to 31 within PHY device 0/1 connected to the MDIO PHY
 343          * management interface
 344          */
 345         struct altera_tse_mdio mdio_phy0;
 346         struct altera_tse_mdio mdio_phy1;
 347
 348         /* 4 Supplemental MAC Addresses */
 349         u32 supp_mac_addr_0_0;
 350         u32 supp_mac_addr_0_1;
 351         u32 supp_mac_addr_1_0;
 352         u32 supp_mac_addr_1_1;
 353         u32 supp_mac_addr_2_0;
 354         u32 supp_mac_addr_2_1;
 355         u32 supp_mac_addr_3_0;
 356         u32 supp_mac_addr_3_1;
 357
 358         u32 reserved4[8];
 359
 360         /* IEEE 1588v2 Feature */
 361         u32 tx_period;
 362         u32 tx_adjust_fns;
 363         u32 tx_adjust_ns;
 364         u32 rx_period;
 365         u32 rx_adjust_fns;
 366         u32 rx_adjust_ns;
 367
 368         u32 reserved5[42];
 369 };
 370
 371 #define tse_csroffs(a) (offsetof(struct altera_tse_mac, a))
 372
 373 /* Transmit and Receive Command Registers Bit Definitions
 374  */
 375 #define ALTERA_TSE_TX_CMD_STAT_OMIT_CRC         BIT(17)
 376 #define ALTERA_TSE_TX_CMD_STAT_TX_SHIFT16       BIT(18)
 377 #define ALTERA_TSE_RX_CMD_STAT_RX_SHIFT16       BIT(25)
 378
 379 /* Wrapper around a pointer to a socket buffer,
 380  * so a DMA handle can be stored along with the buffer
 381  */
 382 struct tse_buffer {
 383         struct list_head lh;
 384         struct sk_buff *skb;
 385         dma_addr_t dma_addr;
 386         u32 len;
 387         int mapped_as_page;
 388 };
 389
 390 struct altera_tse_private;
 391
 392 #define ALTERA_DTYPE_SGDMA 1
 393 #define ALTERA_DTYPE_MSGDMA 2
 394
 395 /* standard DMA interface for SGDMA and MSGDMA */
 396 struct altera_dmaops {
 397         int altera_dtype;
 398         int dmamask;
 399         void (*reset_dma)(struct altera_tse_private *);
 400         void (*enable_txirq)(struct altera_tse_private *);
 401         void (*enable_rxirq)(struct altera_tse_private *);
 402         void (*disable_txirq)(struct altera_tse_private *);
 403         void (*disable_rxirq)(struct altera_tse_private *);
 404         void (*clear_txirq)(struct altera_tse_private *);
 405         void (*clear_rxirq)(struct altera_tse_private *);
 406         int (*tx_buffer)(struct altera_tse_private *, struct tse_buffer *);
 407         u32 (*tx_completions)(struct altera_tse_private *);
 408         void (*add_rx_desc)(struct altera_tse_private *, struct tse_buffer *);
 409         u32 (*get_rx_status)(struct altera_tse_private *);
 410         int (*init_dma)(struct altera_tse_private *);
 411         void (*uninit_dma)(struct altera_tse_private *);
 412         void (*start_rxdma)(struct altera_tse_private *);
 413 };
 414
 415 /* This structure is private to each device.
 416  */
 417 struct altera_tse_private {
 418         struct net_device *dev;
 419         struct device *device;
 420         struct napi_struct napi;
 421
 422         /* MAC address space */
 423         struct altera_tse_mac __iomem *mac_dev;
 424
 425         /* TSE Revision */
 426         u32     revision;
 427
 428         /* mSGDMA Rx Dispatcher address space */
 429         void __iomem *rx_dma_csr;
 430         void __iomem *rx_dma_desc;
 431         void __iomem *rx_dma_resp;
 432
 433         /* mSGDMA Tx Dispatcher address space */
 434         void __iomem *tx_dma_csr;
 435         void __iomem *tx_dma_desc;
 436
 437         /* Rx buffers queue */
 438         struct tse_buffer *rx_ring;
 439         u32 rx_cons;
 440         u32 rx_prod;
 441         u32 rx_ring_size;
 442         u32 rx_dma_buf_sz;
 443
 444         /* Tx ring buffer */
 445         struct tse_buffer *tx_ring;
 446         u32 tx_prod;
 447         u32 tx_cons;
 448         u32 tx_ring_size;
 449
 450         /* Interrupts */
 451         u32 tx_irq;
 452         u32 rx_irq;
 453
 454         /* RX/TX MAC FIFO configs */
 455         u32 tx_fifo_depth;
 456         u32 rx_fifo_depth;
 457
 458         /* Hash filter settings */
 459         u32 hash_filter;
 460         u32 added_unicast;
 461
 462         /* Descriptor memory info for managing SGDMA */
 463         u32 txdescmem;
 464         u32 rxdescmem;
 465         dma_addr_t rxdescmem_busaddr;
 466         dma_addr_t txdescmem_busaddr;
 467         u32 txctrlreg;
 468         u32 rxctrlreg;
 469         dma_addr_t rxdescphys;
 470         dma_addr_t txdescphys;
 471
 472         struct list_head txlisthd;
 473         struct list_head rxlisthd;
 474
 475         /* MAC command_config register protection */
 476         spinlock_t mac_cfg_lock;
 477         /* Tx path protection */
 478         spinlock_t tx_lock;
 479         /* Rx DMA & interrupt control protection */
 480         spinlock_t rxdma_irq_lock;
 481
 482         /* PHY */
 483         int phy_addr;           /* PHY's MDIO address, -1 for autodetection */
 484         phy_interface_t phy_iface;
 485         struct mii_bus *mdio;
 486         int oldspeed;
 487         int oldduplex;
 488         int oldlink;
 489
 490         /* ethtool msglvl option */
 491         u32 msg_enable;
 492
 493         struct altera_dmaops *dmaops;
 494 };
 495
 496 /* Function prototypes
 497  */
 498 void altera_tse_set_ethtool_ops(struct net_device *);
 499
 500 static inline
 501 u32 csrrd32(void __iomem *mac, size_t offs)
 502 {
 503         void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
 504         return readl(paddr);
 505 }
 506
 507 static inline
 508 u16 csrrd16(void __iomem *mac, size_t offs)
 509 {
 510         void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
 511         return readw(paddr);
 512 }
 513
 514 static inline
 515 u8 csrrd8(void __iomem *mac, size_t offs)
 516 {
 517         void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
 518         return readb(paddr);
 519 }
 520
 521 static inline
 522 void csrwr32(u32 val, void __iomem *mac, size_t offs)
 523 {
 524         void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
 525
 526         writel(val, paddr);
 527 }
 528
 529 static inline
 530 void csrwr16(u16 val, void __iomem *mac, size_t offs)
 531 {
 532         void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
 533
 534         writew(val, paddr);
 535 }
 536
 537 static inline
 538 void csrwr8(u8 val, void __iomem *mac, size_t offs)
 539 {
 540         void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
 541
 542         writeb(val, paddr);
 543 }
 544
 545 #endif /* __ALTERA_TSE_H__ */