drivers/net/tulip/tulip.h

   1 /*
   2         drivers/net/tulip/tulip.h
   3
   4         Copyright 2000,2001  The Linux Kernel Team
   5         Written/copyright 1994-2001 by Donald Becker.
   6
   7         This software may be used and distributed according to the terms
   8         of the GNU General Public License, incorporated herein by reference.
   9
  10         Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
  11         for more information on this driver, or visit the project
  12         Web page at http://sourceforge.net/projects/tulip/
  13
  14 */
  15
  16 #ifndef __NET_TULIP_H__
  17 #define __NET_TULIP_H__
  18
  19 #include <linux/kernel.h>
  20 #include <linux/types.h>
  21 #include <linux/spinlock.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/timer.h>
  24 #include <linux/delay.h>
  25 #include <asm/io.h>
  26 #include <asm/irq.h>
  27
  28
  29
  30 /* undefine, or define to various debugging levels (>4 == obscene levels) */
  31 #define TULIP_DEBUG 1
  32
  33 #ifdef CONFIG_TULIP_MMIO
  34 #define TULIP_BAR       1       /* CBMA */
  35 #else
  36 #define TULIP_BAR       0       /* CBIO */
  37 #endif
  38
  39
  40
  41 struct tulip_chip_table {
  42         char *chip_name;
  43         int io_size;
  44         int valid_intrs;        /* CSR7 interrupt enable settings */
  45         int flags;
  46         void (*media_timer) (unsigned long);
  47         void (*media_task) (void *);
  48 };
  49
  50
  51 enum tbl_flag {
  52         HAS_MII                 = 0x0001,
  53         HAS_MEDIA_TABLE         = 0x0002,
  54         CSR12_IN_SROM           = 0x0004,
  55         ALWAYS_CHECK_MII        = 0x0008,
  56         HAS_ACPI                = 0x0010,
  57         MC_HASH_ONLY            = 0x0020, /* Hash-only multicast filter. */
  58         HAS_PNICNWAY            = 0x0080,
  59         HAS_NWAY                = 0x0040, /* Uses internal NWay xcvr. */
  60         HAS_INTR_MITIGATION     = 0x0100,
  61         IS_ASIX                 = 0x0200,
  62         HAS_8023X               = 0x0400,
  63         COMET_MAC_ADDR          = 0x0800,
  64         HAS_PCI_MWI             = 0x1000,
  65         HAS_PHY_IRQ             = 0x2000,
  66         HAS_SWAPPED_SEEPROM     = 0x4000,
  67         NEEDS_FAKE_MEDIA_TABLE  = 0x8000,
  68 };
  69
  70
  71 /* chip types.  careful!  order is VERY IMPORTANT here, as these
  72  * are used throughout the driver as indices into arrays */
  73 /* Note 21142 == 21143. */
  74 enum chips {
  75         DC21040 = 0,
  76         DC21041 = 1,
  77         DC21140 = 2,
  78         DC21142 = 3, DC21143 = 3,
  79         LC82C168,
  80         MX98713,
  81         MX98715,
  82         MX98725,
  83         AX88140,
  84         PNIC2,
  85         COMET,
  86         COMPEX9881,
  87         I21145,
  88         DM910X,
  89         CONEXANT,
  90 };
  91
  92
  93 enum MediaIs {
  94         MediaIsFD = 1,
  95         MediaAlwaysFD = 2,
  96         MediaIsMII = 4,
  97         MediaIsFx = 8,
  98         MediaIs100 = 16
  99 };
 100
 101
 102 /* Offsets to the Command and Status Registers, "CSRs".  All accesses
 103    must be longword instructions and quadword aligned. */
 104 enum tulip_offsets {
 105         CSR0 = 0,
 106         CSR1 = 0x08,
 107         CSR2 = 0x10,
 108         CSR3 = 0x18,
 109         CSR4 = 0x20,
 110         CSR5 = 0x28,
 111         CSR6 = 0x30,
 112         CSR7 = 0x38,
 113         CSR8 = 0x40,
 114         CSR9 = 0x48,
 115         CSR10 = 0x50,
 116         CSR11 = 0x58,
 117         CSR12 = 0x60,
 118         CSR13 = 0x68,
 119         CSR14 = 0x70,
 120         CSR15 = 0x78,
 121 };
 122
 123 /* register offset and bits for CFDD PCI config reg */
 124 enum pci_cfg_driver_reg {
 125         CFDD = 0x40,
 126         CFDD_Sleep = (1 << 31),
 127         CFDD_Snooze = (1 << 30),
 128 };
 129
 130 #define RxPollInt (RxIntr|RxNoBuf|RxDied|RxJabber)
 131
 132 /* The bits in the CSR5 status registers, mostly interrupt sources. */
 133 enum status_bits {
 134         TimerInt = 0x800,
 135         SytemError = 0x2000,
 136         TPLnkFail = 0x1000,
 137         TPLnkPass = 0x10,
 138         NormalIntr = 0x10000,
 139         AbnormalIntr = 0x8000,
 140         RxJabber = 0x200,
 141         RxDied = 0x100,
 142         RxNoBuf = 0x80,
 143         RxIntr = 0x40,
 144         TxFIFOUnderflow = 0x20,
 145         RxErrIntr = 0x10,
 146         TxJabber = 0x08,
 147         TxNoBuf = 0x04,
 148         TxDied = 0x02,
 149         TxIntr = 0x01,
 150 };
 151
 152 /* bit mask for CSR5 TX/RX process state */
 153 #define CSR5_TS 0x00700000
 154 #define CSR5_RS 0x000e0000
 155
 156 enum tulip_mode_bits {
 157         TxThreshold             = (1 << 22),
 158         FullDuplex              = (1 << 9),
 159         TxOn                    = 0x2000,
 160         AcceptBroadcast         = 0x0100,
 161         AcceptAllMulticast      = 0x0080,
 162         AcceptAllPhys           = 0x0040,
 163         AcceptRunt              = 0x0008,
 164         RxOn                    = 0x0002,
 165         RxTx                    = (TxOn | RxOn),
 166 };
 167
 168
 169 enum tulip_busconfig_bits {
 170         MWI                     = (1 << 24),
 171         MRL                     = (1 << 23),
 172         MRM                     = (1 << 21),
 173         CALShift                = 14,
 174         BurstLenShift           = 8,
 175 };
 176
 177
 178 /* The Tulip Rx and Tx buffer descriptors. */
 179 struct tulip_rx_desc {
 180         s32 status;
 181         s32 length;
 182         u32 buffer1;
 183         u32 buffer2;
 184 };
 185
 186
 187 struct tulip_tx_desc {
 188         s32 status;
 189         s32 length;
 190         u32 buffer1;
 191         u32 buffer2;            /* We use only buffer 1.  */
 192 };
 193
 194
 195 enum desc_status_bits {
 196         DescOwned    = 0x80000000,
 197         DescWholePkt = 0x60000000,
 198         DescEndPkt   = 0x40000000,
 199         DescStartPkt = 0x20000000,
 200         DescEndRing  = 0x02000000,
 201         DescUseLink  = 0x01000000,
 202         RxDescFatalErr = 0x008000,
 203         RxWholePkt   = 0x00000300,
 204 };
 205
 206
 207 enum t21143_csr6_bits {
 208         csr6_sc = (1<<31),
 209         csr6_ra = (1<<30),
 210         csr6_ign_dest_msb = (1<<26),
 211         csr6_mbo = (1<<25),
 212         csr6_scr = (1<<24),  /* scramble mode flag: can't be set */
 213         csr6_pcs = (1<<23),  /* Enables PCS functions (symbol mode requires csr6_ps be set) default is set */
 214         csr6_ttm = (1<<22),  /* Transmit Threshold Mode, set for 10baseT, 0 for 100BaseTX */
 215         csr6_sf = (1<<21),   /* Store and forward. If set ignores TR bits */
 216         csr6_hbd = (1<<19),  /* Heart beat disable. Disables SQE function in 10baseT */
 217         csr6_ps = (1<<18),   /* Port Select. 0 (defualt) = 10baseT, 1 = 100baseTX: can't be set */
 218         csr6_ca = (1<<17),   /* Collision Offset Enable. If set uses special algorithm in low collision situations */
 219         csr6_trh = (1<<15),  /* Transmit Threshold high bit */
 220         csr6_trl = (1<<14),  /* Transmit Threshold low bit */
 221
 222         /***************************************************************
 223          * This table shows transmit threshold values based on media   *
 224          * and these two registers (from PNIC1 & 2 docs) Note: this is *
 225          * all meaningless if sf is set.                               *
 226          ***************************************************************/
 227
 228         /***********************************
 229          * (trh,trl) * 100BaseTX * 10BaseT *
 230          ***********************************
 231          *   (0,0)   *     128   *    72   *
 232          *   (0,1)   *     256   *    96   *
 233          *   (1,0)   *     512   *   128   *
 234          *   (1,1)   *    1024   *   160   *
 235          ***********************************/
 236
 237         csr6_fc = (1<<12),   /* Forces a collision in next transmission (for testing in loopback mode) */
 238         csr6_om_int_loop = (1<<10), /* internal (FIFO) loopback flag */
 239         csr6_om_ext_loop = (1<<11), /* external (PMD) loopback flag */
 240         /* set both and you get (PHY) loopback */
 241         csr6_fd = (1<<9),    /* Full duplex mode, disables hearbeat, no loopback */
 242         csr6_pm = (1<<7),    /* Pass All Multicast */
 243         csr6_pr = (1<<6),    /* Promiscuous mode */
 244         csr6_sb = (1<<5),    /* Start(1)/Stop(0) backoff counter */
 245         csr6_if = (1<<4),    /* Inverse Filtering, rejects only addresses in address table: can't be set */
 246         csr6_pb = (1<<3),    /* Pass Bad Frames, (1) causes even bad frames to be passed on */
 247         csr6_ho = (1<<2),    /* Hash-only filtering mode: can't be set */
 248         csr6_hp = (1<<0),    /* Hash/Perfect Receive Filtering Mode: can't be set */
 249
 250         csr6_mask_capture = (csr6_sc | csr6_ca),
 251         csr6_mask_defstate = (csr6_mask_capture | csr6_mbo),
 252         csr6_mask_hdcap = (csr6_mask_defstate | csr6_hbd | csr6_ps),
 253         csr6_mask_hdcaptt = (csr6_mask_hdcap  | csr6_trh | csr6_trl),
 254         csr6_mask_fullcap = (csr6_mask_hdcaptt | csr6_fd),
 255         csr6_mask_fullpromisc = (csr6_pr | csr6_pm),
 256         csr6_mask_filters = (csr6_hp | csr6_ho | csr6_if),
 257         csr6_mask_100bt = (csr6_scr | csr6_pcs | csr6_hbd),
 258 };
 259
 260
 261 /* Keep the ring sizes a power of two for efficiency.
 262    Making the Tx ring too large decreases the effectiveness of channel
 263    bonding and packet priority.
 264    There are no ill effects from too-large receive rings. */
 265
 266 #define TX_RING_SIZE    32
 267 #define RX_RING_SIZE    128
 268 #define MEDIA_MASK     31
 269
 270 #define PKT_BUF_SZ              1536    /* Size of each temporary Rx buffer. */
 271
 272 #define TULIP_MIN_CACHE_LINE    8       /* in units of 32-bit words */
 273
 274 #if defined(__sparc__) || defined(__hppa__)
 275 /* The UltraSparc PCI controllers will disconnect at every 64-byte
 276  * crossing anyways so it makes no sense to tell Tulip to burst
 277  * any more than that.
 278  */
 279 #define TULIP_MAX_CACHE_LINE    16      /* in units of 32-bit words */
 280 #else
 281 #define TULIP_MAX_CACHE_LINE    32      /* in units of 32-bit words */
 282 #endif
 283
 284
 285 /* Ring-wrap flag in length field, use for last ring entry.
 286         0x01000000 means chain on buffer2 address,
 287         0x02000000 means use the ring start address in CSR2/3.
 288    Note: Some work-alike chips do not function correctly in chained mode.
 289    The ASIX chip works only in chained mode.
 290    Thus we indicates ring mode, but always write the 'next' field for
 291    chained mode as well.
 292 */
 293 #define DESC_RING_WRAP 0x02000000
 294
 295
 296 #define EEPROM_SIZE 512         /* 2 << EEPROM_ADDRLEN */
 297
 298
 299 #define RUN_AT(x) (jiffies + (x))
 300
 301 #if defined(__i386__)                   /* AKA get_unaligned() */
 302 #define get_u16(ptr) (*(u16 *)(ptr))
 303 #else
 304 #define get_u16(ptr) (((u8*)(ptr))[0] + (((u8*)(ptr))[1]<<8))
 305 #endif
 306
 307 struct medialeaf {
 308         u8 type;
 309         u8 media;
 310         unsigned char *leafdata;
 311 };
 312
 313
 314 struct mediatable {
 315         u16 defaultmedia;
 316         u8 leafcount;
 317         u8 csr12dir;            /* General purpose pin directions. */
 318         unsigned has_mii:1;
 319         unsigned has_nonmii:1;
 320         unsigned has_reset:6;
 321         u32 csr15dir;
 322         u32 csr15val;           /* 21143 NWay setting. */
 323         struct medialeaf mleaf[0];
 324 };
 325
 326
 327 struct mediainfo {
 328         struct mediainfo *next;
 329         int info_type;
 330         int index;
 331         unsigned char *info;
 332 };
 333
 334 struct ring_info {
 335         struct sk_buff  *skb;
 336         dma_addr_t      mapping;
 337 };
 338
 339
 340 struct tulip_private {
 341         const char *product_name;
 342         struct net_device *next_module;
 343         struct tulip_rx_desc *rx_ring;
 344         struct tulip_tx_desc *tx_ring;
 345         dma_addr_t rx_ring_dma;
 346         dma_addr_t tx_ring_dma;
 347         /* The saved address of a sent-in-place packet/buffer, for skfree(). */
 348         struct ring_info tx_buffers[TX_RING_SIZE];
 349         /* The addresses of receive-in-place skbuffs. */
 350         struct ring_info rx_buffers[RX_RING_SIZE];
 351         u16 setup_frame[96];    /* Pseudo-Tx frame to init address table. */
 352         int chip_id;
 353         int revision;
 354         int flags;
 355         struct net_device_stats stats;
 356         struct timer_list timer;        /* Media selection timer. */
 357         struct timer_list oom_timer;    /* Out of memory timer. */
 358         u32 mc_filter[2];
 359         spinlock_t lock;
 360         spinlock_t mii_lock;
 361         unsigned int cur_rx, cur_tx;    /* The next free ring entry */
 362         unsigned int dirty_rx, dirty_tx;        /* The ring entries to be free()ed. */
 363
 364 #ifdef  CONFIG_TULIP_NAPI_HW_MITIGATION
 365         int mit_on;
 366 #endif
 367         unsigned int full_duplex:1;     /* Full-duplex operation requested. */
 368         unsigned int full_duplex_lock:1;
 369         unsigned int fake_addr:1;       /* Multiport board faked address. */
 370         unsigned int default_port:4;    /* Last dev->if_port value. */
 371         unsigned int media2:4;  /* Secondary monitored media port. */
 372         unsigned int medialock:1;       /* Don't sense media type. */
 373         unsigned int mediasense:1;      /* Media sensing in progress. */
 374         unsigned int nway:1, nwayset:1;         /* 21143 internal NWay. */
 375         unsigned int timeout_recovery:1;
 376         unsigned int csr0;      /* CSR0 setting. */
 377         unsigned int csr6;      /* Current CSR6 control settings. */
 378         unsigned char eeprom[EEPROM_SIZE];      /* Serial EEPROM contents. */
 379         void (*link_change) (struct net_device * dev, int csr5);
 380         u16 sym_advertise, mii_advertise; /* NWay capabilities advertised.  */
 381         u16 lpar;               /* 21143 Link partner ability. */
 382         u16 advertising[4];
 383         signed char phys[4], mii_cnt;   /* MII device addresses. */
 384         struct mediatable *mtable;
 385         int cur_index;          /* Current media index. */
 386         int saved_if_port;
 387         struct pci_dev *pdev;
 388         int ttimer;
 389         int susp_rx;
 390         unsigned long nir;
 391         void __iomem *base_addr;
 392         int csr12_shadow;
 393         int pad0;               /* Used for 8-byte alignment */
 394         struct work_struct media_work;
 395 };
 396
 397
 398 struct eeprom_fixup {
 399         char *name;
 400         unsigned char addr0;
 401         unsigned char addr1;
 402         unsigned char addr2;
 403         u16 newtable[32];       /* Max length below. */
 404 };
 405
 406
 407 /* 21142.c */
 408 extern u16 t21142_csr14[];
 409 void t21142_media_task(void *data);
 410 void t21142_start_nway(struct net_device *dev);
 411 void t21142_lnk_change(struct net_device *dev, int csr5);
 412
 413
 414 /* PNIC2.c */
 415 void pnic2_lnk_change(struct net_device *dev, int csr5);
 416 void pnic2_timer(unsigned long data);
 417 void pnic2_start_nway(struct net_device *dev);
 418 void pnic2_lnk_change(struct net_device *dev, int csr5);
 419
 420 /* eeprom.c */
 421 void tulip_parse_eeprom(struct net_device *dev);
 422 int tulip_read_eeprom(struct net_device *dev, int location, int addr_len);
 423
 424 /* interrupt.c */
 425 extern unsigned int tulip_max_interrupt_work;
 426 extern int tulip_rx_copybreak;
 427 irqreturn_t tulip_interrupt(int irq, void *dev_instance);
 428 int tulip_refill_rx(struct net_device *dev);
 429 #ifdef CONFIG_TULIP_NAPI
 430 int tulip_poll(struct net_device *dev, int *budget);
 431 #endif
 432
 433
 434 /* media.c */
 435 int tulip_mdio_read(struct net_device *dev, int phy_id, int location);
 436 void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int value);
 437 void tulip_select_media(struct net_device *dev, int startup);
 438 int tulip_check_duplex(struct net_device *dev);
 439 void tulip_find_mii (struct net_device *dev, int board_idx);
 440
 441 /* pnic.c */
 442 void pnic_do_nway(struct net_device *dev);
 443 void pnic_lnk_change(struct net_device *dev, int csr5);
 444 void pnic_timer(unsigned long data);
 445
 446 /* timer.c */
 447 void tulip_media_task(void *data);
 448 void mxic_timer(unsigned long data);
 449 void comet_timer(unsigned long data);
 450
 451 /* tulip_core.c */
 452 extern int tulip_debug;
 453 extern const char * const medianame[];
 454 extern const char tulip_media_cap[];
 455 extern struct tulip_chip_table tulip_tbl[];
 456 void oom_timer(unsigned long data);
 457 extern u8 t21040_csr13[];
 458
 459 static inline void tulip_start_rxtx(struct tulip_private *tp)
 460 {
 461         void __iomem *ioaddr = tp->base_addr;
 462         iowrite32(tp->csr6 | RxTx, ioaddr + CSR6);
 463         barrier();
 464         (void) ioread32(ioaddr + CSR6); /* mmio sync */
 465 }
 466
 467 static inline void tulip_stop_rxtx(struct tulip_private *tp)
 468 {
 469         void __iomem *ioaddr = tp->base_addr;
 470         u32 csr6 = ioread32(ioaddr + CSR6);
 471
 472         if (csr6 & RxTx) {
 473                 unsigned i=1300/10;
 474                 iowrite32(csr6 & ~RxTx, ioaddr + CSR6);
 475                 barrier();
 476                 /* wait until in-flight frame completes.
 477                  * Max time @ 10BT: 1500*8b/10Mbps == 1200us (+ 100us margin)
 478                  * Typically expect this loop to end in < 50 us on 100BT.
 479                  */
 480                 while (--i && (ioread32(ioaddr + CSR5) & (CSR5_TS|CSR5_RS)))
 481                         udelay(10);
 482
 483                 if (!i)
 484                         printk(KERN_DEBUG "%s: tulip_stop_rxtx() failed\n",
 485                                         pci_name(tp->pdev));
 486         }
 487 }
 488
 489 static inline void tulip_restart_rxtx(struct tulip_private *tp)
 490 {
 491         tulip_stop_rxtx(tp);
 492         udelay(5);
 493         tulip_start_rxtx(tp);
 494 }
 495
 496 static inline void tulip_tx_timeout_complete(struct tulip_private *tp, void __iomem *ioaddr)
 497 {
 498         /* Stop and restart the chip's Tx processes. */
 499         tulip_restart_rxtx(tp);
 500         /* Trigger an immediate transmit demand. */
 501         iowrite32(0, ioaddr + CSR1);
 502
 503         tp->stats.tx_errors++;
 504 }
 505
 506 #endif /* __NET_TULIP_H__ */