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.
  12
  13         Please submit bugs to http://bugzilla.kernel.org/ .
  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 <linux/pci.h>
  26 #include <asm/io.h>
  27 #include <asm/irq.h>
  28 #include <asm/unaligned.h>
  29
  30
  31
  32 /* undefine, or define to various debugging levels (>4 == obscene levels) */
  33 #define TULIP_DEBUG 1
  34
  35 #ifdef CONFIG_TULIP_MMIO
  36 #define TULIP_BAR       1       /* CBMA */
  37 #else
  38 #define TULIP_BAR       0       /* CBIO */
  39 #endif
  40
  41
  42
  43 struct tulip_chip_table {
  44         char *chip_name;
  45         int io_size;
  46         int valid_intrs;        /* CSR7 interrupt enable settings */
  47         int flags;
  48         void (*media_timer) (unsigned long);
  49         work_func_t media_task;
  50 };
  51
  52
  53 enum tbl_flag {
  54         HAS_MII                 = 0x0001,
  55         HAS_MEDIA_TABLE         = 0x0002,
  56         CSR12_IN_SROM           = 0x0004,
  57         ALWAYS_CHECK_MII        = 0x0008,
  58         HAS_ACPI                = 0x0010,
  59         MC_HASH_ONLY            = 0x0020, /* Hash-only multicast filter. */
  60         HAS_PNICNWAY            = 0x0080,
  61         HAS_NWAY                = 0x0040, /* Uses internal NWay xcvr. */
  62         HAS_INTR_MITIGATION     = 0x0100,
  63         IS_ASIX                 = 0x0200,
  64         HAS_8023X               = 0x0400,
  65         COMET_MAC_ADDR          = 0x0800,
  66         HAS_PCI_MWI             = 0x1000,
  67         HAS_PHY_IRQ             = 0x2000,
  68         HAS_SWAPPED_SEEPROM     = 0x4000,
  69         NEEDS_FAKE_MEDIA_TABLE  = 0x8000,
  70 };
  71
  72
  73 /* chip types.  careful!  order is VERY IMPORTANT here, as these
  74  * are used throughout the driver as indices into arrays */
  75 /* Note 21142 == 21143. */
  76 enum chips {
  77         DC21040 = 0,
  78         DC21041 = 1,
  79         DC21140 = 2,
  80         DC21142 = 3, DC21143 = 3,
  81         LC82C168,
  82         MX98713,
  83         MX98715,
  84         MX98725,
  85         AX88140,
  86         PNIC2,
  87         COMET,
  88         COMPEX9881,
  89         I21145,
  90         DM910X,
  91         CONEXANT,
  92 };
  93
  94
  95 enum MediaIs {
  96         MediaIsFD = 1,
  97         MediaAlwaysFD = 2,
  98         MediaIsMII = 4,
  99         MediaIsFx = 8,
 100         MediaIs100 = 16
 101 };
 102
 103
 104 /* Offsets to the Command and Status Registers, "CSRs".  All accesses
 105    must be longword instructions and quadword aligned. */
 106 enum tulip_offsets {
 107         CSR0 = 0,
 108         CSR1 = 0x08,
 109         CSR2 = 0x10,
 110         CSR3 = 0x18,
 111         CSR4 = 0x20,
 112         CSR5 = 0x28,
 113         CSR6 = 0x30,
 114         CSR7 = 0x38,
 115         CSR8 = 0x40,
 116         CSR9 = 0x48,
 117         CSR10 = 0x50,
 118         CSR11 = 0x58,
 119         CSR12 = 0x60,
 120         CSR13 = 0x68,
 121         CSR14 = 0x70,
 122         CSR15 = 0x78,
 123 };
 124
 125 /* register offset and bits for CFDD PCI config reg */
 126 enum pci_cfg_driver_reg {
 127         CFDD = 0x40,
 128         CFDD_Sleep = (1 << 31),
 129         CFDD_Snooze = (1 << 30),
 130 };
 131
 132 #define RxPollInt (RxIntr|RxNoBuf|RxDied|RxJabber)
 133
 134 /* The bits in the CSR5 status registers, mostly interrupt sources. */
 135 enum status_bits {
 136         TimerInt = 0x800,
 137         SystemError = 0x2000,
 138         TPLnkFail = 0x1000,
 139         TPLnkPass = 0x10,
 140         NormalIntr = 0x10000,
 141         AbnormalIntr = 0x8000,
 142         RxJabber = 0x200,
 143         RxDied = 0x100,
 144         RxNoBuf = 0x80,
 145         RxIntr = 0x40,
 146         TxFIFOUnderflow = 0x20,
 147         RxErrIntr = 0x10,
 148         TxJabber = 0x08,
 149         TxNoBuf = 0x04,
 150         TxDied = 0x02,
 151         TxIntr = 0x01,
 152 };
 153
 154 /* bit mask for CSR5 TX/RX process state */
 155 #define CSR5_TS 0x00700000
 156 #define CSR5_RS 0x000e0000
 157
 158 enum tulip_mode_bits {
 159         TxThreshold             = (1 << 22),
 160         FullDuplex              = (1 << 9),
 161         TxOn                    = 0x2000,
 162         AcceptBroadcast         = 0x0100,
 163         AcceptAllMulticast      = 0x0080,
 164         AcceptAllPhys           = 0x0040,
 165         AcceptRunt              = 0x0008,
 166         RxOn                    = 0x0002,
 167         RxTx                    = (TxOn | RxOn),
 168 };
 169
 170
 171 enum tulip_busconfig_bits {
 172         MWI                     = (1 << 24),
 173         MRL                     = (1 << 23),
 174         MRM                     = (1 << 21),
 175         CALShift                = 14,
 176         BurstLenShift           = 8,
 177 };
 178
 179
 180 /* The Tulip Rx and Tx buffer descriptors. */
 181 struct tulip_rx_desc {
 182         __le32 status;
 183         __le32 length;
 184         __le32 buffer1;
 185         __le32 buffer2;
 186 };
 187
 188
 189 struct tulip_tx_desc {
 190         __le32 status;
 191         __le32 length;
 192         __le32 buffer1;
 193         __le32 buffer2;         /* We use only buffer 1.  */
 194 };
 195
 196
 197 enum desc_status_bits {
 198         DescOwned    = 0x80000000,
 199         DescWholePkt = 0x60000000,
 200         DescEndPkt   = 0x40000000,
 201         DescStartPkt = 0x20000000,
 202         DescEndRing  = 0x02000000,
 203         DescUseLink  = 0x01000000,
 204         RxDescFatalErr = 0x008000,
 205         RxWholePkt   = 0x00000300,
 206 };
 207
 208
 209 enum t21143_csr6_bits {
 210         csr6_sc = (1<<31),
 211         csr6_ra = (1<<30),
 212         csr6_ign_dest_msb = (1<<26),
 213         csr6_mbo = (1<<25),
 214         csr6_scr = (1<<24),  /* scramble mode flag: can't be set */
 215         csr6_pcs = (1<<23),  /* Enables PCS functions (symbol mode requires csr6_ps be set) default is set */
 216         csr6_ttm = (1<<22),  /* Transmit Threshold Mode, set for 10baseT, 0 for 100BaseTX */
 217         csr6_sf = (1<<21),   /* Store and forward. If set ignores TR bits */
 218         csr6_hbd = (1<<19),  /* Heart beat disable. Disables SQE function in 10baseT */
 219         csr6_ps = (1<<18),   /* Port Select. 0 (defualt) = 10baseT, 1 = 100baseTX: can't be set */
 220         csr6_ca = (1<<17),   /* Collision Offset Enable. If set uses special algorithm in low collision situations */
 221         csr6_trh = (1<<15),  /* Transmit Threshold high bit */
 222         csr6_trl = (1<<14),  /* Transmit Threshold low bit */
 223
 224         /***************************************************************
 225          * This table shows transmit threshold values based on media   *
 226          * and these two registers (from PNIC1 & 2 docs) Note: this is *
 227          * all meaningless if sf is set.                               *
 228          ***************************************************************/
 229
 230         /***********************************
 231          * (trh,trl) * 100BaseTX * 10BaseT *
 232          ***********************************
 233          *   (0,0)   *     128   *    72   *
 234          *   (0,1)   *     256   *    96   *
 235          *   (1,0)   *     512   *   128   *
 236          *   (1,1)   *    1024   *   160   *
 237          ***********************************/
 238
 239         csr6_fc = (1<<12),   /* Forces a collision in next transmission (for testing in loopback mode) */
 240         csr6_om_int_loop = (1<<10), /* internal (FIFO) loopback flag */
 241         csr6_om_ext_loop = (1<<11), /* external (PMD) loopback flag */
 242         /* set both and you get (PHY) loopback */
 243         csr6_fd = (1<<9),    /* Full duplex mode, disables hearbeat, no loopback */
 244         csr6_pm = (1<<7),    /* Pass All Multicast */
 245         csr6_pr = (1<<6),    /* Promiscuous mode */
 246         csr6_sb = (1<<5),    /* Start(1)/Stop(0) backoff counter */
 247         csr6_if = (1<<4),    /* Inverse Filtering, rejects only addresses in address table: can't be set */
 248         csr6_pb = (1<<3),    /* Pass Bad Frames, (1) causes even bad frames to be passed on */
 249         csr6_ho = (1<<2),    /* Hash-only filtering mode: can't be set */
 250         csr6_hp = (1<<0),    /* Hash/Perfect Receive Filtering Mode: can't be set */
 251
 252         csr6_mask_capture = (csr6_sc | csr6_ca),
 253         csr6_mask_defstate = (csr6_mask_capture | csr6_mbo),
 254         csr6_mask_hdcap = (csr6_mask_defstate | csr6_hbd | csr6_ps),
 255         csr6_mask_hdcaptt = (csr6_mask_hdcap  | csr6_trh | csr6_trl),
 256         csr6_mask_fullcap = (csr6_mask_hdcaptt | csr6_fd),
 257         csr6_mask_fullpromisc = (csr6_pr | csr6_pm),
 258         csr6_mask_filters = (csr6_hp | csr6_ho | csr6_if),
 259         csr6_mask_100bt = (csr6_scr | csr6_pcs | csr6_hbd),
 260 };
 261
 262
 263 /* Keep the ring sizes a power of two for efficiency.
 264    Making the Tx ring too large decreases the effectiveness of channel
 265    bonding and packet priority.
 266    There are no ill effects from too-large receive rings. */
 267
 268 #define TX_RING_SIZE    32
 269 #define RX_RING_SIZE    128
 270 #define MEDIA_MASK     31
 271
 272 /* The receiver on the DC21143 rev 65 can fail to close the last
 273  * receive descriptor in certain circumstances (see errata) when
 274  * using MWI. This can only occur if the receive buffer ends on
 275  * a cache line boundary, so the "+ 4" below ensures it doesn't.
 276  */
 277 #define PKT_BUF_SZ      (1536 + 4)      /* Size of each temporary Rx buffer. */
 278
 279 #define TULIP_MIN_CACHE_LINE    8       /* in units of 32-bit words */
 280
 281 #if defined(__sparc__) || defined(__hppa__)
 282 /* The UltraSparc PCI controllers will disconnect at every 64-byte
 283  * crossing anyways so it makes no sense to tell Tulip to burst
 284  * any more than that.
 285  */
 286 #define TULIP_MAX_CACHE_LINE    16      /* in units of 32-bit words */
 287 #else
 288 #define TULIP_MAX_CACHE_LINE    32      /* in units of 32-bit words */
 289 #endif
 290
 291
 292 /* Ring-wrap flag in length field, use for last ring entry.
 293         0x01000000 means chain on buffer2 address,
 294         0x02000000 means use the ring start address in CSR2/3.
 295    Note: Some work-alike chips do not function correctly in chained mode.
 296    The ASIX chip works only in chained mode.
 297    Thus we indicates ring mode, but always write the 'next' field for
 298    chained mode as well.
 299 */
 300 #define DESC_RING_WRAP 0x02000000
 301
 302
 303 #define EEPROM_SIZE 512         /* 2 << EEPROM_ADDRLEN */
 304
 305
 306 #define RUN_AT(x) (jiffies + (x))
 307
 308 #define get_u16(ptr) get_unaligned_le16((ptr))
 309
 310 struct medialeaf {
 311         u8 type;
 312         u8 media;
 313         unsigned char *leafdata;
 314 };
 315
 316
 317 struct mediatable {
 318         u16 defaultmedia;
 319         u8 leafcount;
 320         u8 csr12dir;            /* General purpose pin directions. */
 321         unsigned has_mii:1;
 322         unsigned has_nonmii:1;
 323         unsigned has_reset:6;
 324         u32 csr15dir;
 325         u32 csr15val;           /* 21143 NWay setting. */
 326         struct medialeaf mleaf[0];
 327 };
 328
 329
 330 struct mediainfo {
 331         struct mediainfo *next;
 332         int info_type;
 333         int index;
 334         unsigned char *info;
 335 };
 336
 337 struct ring_info {
 338         struct sk_buff  *skb;
 339         dma_addr_t      mapping;
 340 };
 341
 342
 343 struct tulip_private {
 344         const char *product_name;
 345         struct net_device *next_module;
 346         struct tulip_rx_desc *rx_ring;
 347         struct tulip_tx_desc *tx_ring;
 348         dma_addr_t rx_ring_dma;
 349         dma_addr_t tx_ring_dma;
 350         /* The saved address of a sent-in-place packet/buffer, for skfree(). */
 351         struct ring_info tx_buffers[TX_RING_SIZE];
 352         /* The addresses of receive-in-place skbuffs. */
 353         struct ring_info rx_buffers[RX_RING_SIZE];
 354         u16 setup_frame[96];    /* Pseudo-Tx frame to init address table. */
 355         int chip_id;
 356         int revision;
 357         int flags;
 358         struct napi_struct napi;
 359         struct net_device_stats stats;
 360         struct timer_list timer;        /* Media selection timer. */
 361         struct timer_list oom_timer;    /* Out of memory timer. */
 362         u32 mc_filter[2];
 363         spinlock_t lock;
 364         spinlock_t mii_lock;
 365         unsigned int cur_rx, cur_tx;    /* The next free ring entry */
 366         unsigned int dirty_rx, dirty_tx;        /* The ring entries to be free()ed. */
 367
 368 #ifdef  CONFIG_TULIP_NAPI_HW_MITIGATION
 369         int mit_on;
 370 #endif
 371         unsigned int full_duplex:1;     /* Full-duplex operation requested. */
 372         unsigned int full_duplex_lock:1;
 373         unsigned int fake_addr:1;       /* Multiport board faked address. */
 374         unsigned int default_port:4;    /* Last dev->if_port value. */
 375         unsigned int media2:4;  /* Secondary monitored media port. */
 376         unsigned int medialock:1;       /* Don't sense media type. */
 377         unsigned int mediasense:1;      /* Media sensing in progress. */
 378         unsigned int nway:1, nwayset:1;         /* 21143 internal NWay. */
 379         unsigned int timeout_recovery:1;
 380         unsigned int csr0;      /* CSR0 setting. */
 381         unsigned int csr6;      /* Current CSR6 control settings. */
 382         unsigned char eeprom[EEPROM_SIZE];      /* Serial EEPROM contents. */
 383         void (*link_change) (struct net_device * dev, int csr5);
 384         u16 sym_advertise, mii_advertise; /* NWay capabilities advertised.  */
 385         u16 lpar;               /* 21143 Link partner ability. */
 386         u16 advertising[4];
 387         signed char phys[4], mii_cnt;   /* MII device addresses. */
 388         struct mediatable *mtable;
 389         int cur_index;          /* Current media index. */
 390         int saved_if_port;
 391         struct pci_dev *pdev;
 392         int ttimer;
 393         int susp_rx;
 394         unsigned long nir;
 395         void __iomem *base_addr;
 396         int csr12_shadow;
 397         int pad0;               /* Used for 8-byte alignment */
 398         struct work_struct media_work;
 399         struct net_device *dev;
 400 };
 401
 402
 403 struct eeprom_fixup {
 404         char *name;
 405         unsigned char addr0;
 406         unsigned char addr1;
 407         unsigned char addr2;
 408         u16 newtable[32];       /* Max length below. */
 409 };
 410
 411
 412 /* 21142.c */
 413 extern u16 t21142_csr14[];
 414 void t21142_media_task(struct work_struct *work);
 415 void t21142_start_nway(struct net_device *dev);
 416 void t21142_lnk_change(struct net_device *dev, int csr5);
 417
 418
 419 /* PNIC2.c */
 420 void pnic2_lnk_change(struct net_device *dev, int csr5);
 421 void pnic2_timer(unsigned long data);
 422 void pnic2_start_nway(struct net_device *dev);
 423 void pnic2_lnk_change(struct net_device *dev, int csr5);
 424
 425 /* eeprom.c */
 426 void tulip_parse_eeprom(struct net_device *dev);
 427 int tulip_read_eeprom(struct net_device *dev, int location, int addr_len);
 428
 429 /* interrupt.c */
 430 extern unsigned int tulip_max_interrupt_work;
 431 extern int tulip_rx_copybreak;
 432 irqreturn_t tulip_interrupt(int irq, void *dev_instance);
 433 int tulip_refill_rx(struct net_device *dev);
 434 #ifdef CONFIG_TULIP_NAPI
 435 int tulip_poll(struct napi_struct *napi, int budget);
 436 #endif
 437
 438
 439 /* media.c */
 440 int tulip_mdio_read(struct net_device *dev, int phy_id, int location);
 441 void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int value);
 442 void tulip_select_media(struct net_device *dev, int startup);
 443 int tulip_check_duplex(struct net_device *dev);
 444 void tulip_find_mii (struct net_device *dev, int board_idx);
 445
 446 /* pnic.c */
 447 void pnic_do_nway(struct net_device *dev);
 448 void pnic_lnk_change(struct net_device *dev, int csr5);
 449 void pnic_timer(unsigned long data);
 450
 451 /* timer.c */
 452 void tulip_media_task(struct work_struct *work);
 453 void mxic_timer(unsigned long data);
 454 void comet_timer(unsigned long data);
 455
 456 /* tulip_core.c */
 457 extern int tulip_debug;
 458 extern const char * const medianame[];
 459 extern const char tulip_media_cap[];
 460 extern struct tulip_chip_table tulip_tbl[];
 461 void oom_timer(unsigned long data);
 462 extern u8 t21040_csr13[];
 463
 464 static inline void tulip_start_rxtx(struct tulip_private *tp)
 465 {
 466         void __iomem *ioaddr = tp->base_addr;
 467         iowrite32(tp->csr6 | RxTx, ioaddr + CSR6);
 468         barrier();
 469         (void) ioread32(ioaddr + CSR6); /* mmio sync */
 470 }
 471
 472 static inline void tulip_stop_rxtx(struct tulip_private *tp)
 473 {
 474         void __iomem *ioaddr = tp->base_addr;
 475         u32 csr6 = ioread32(ioaddr + CSR6);
 476
 477         if (csr6 & RxTx) {
 478                 unsigned i=1300/10;
 479                 iowrite32(csr6 & ~RxTx, ioaddr + CSR6);
 480                 barrier();
 481                 /* wait until in-flight frame completes.
 482                  * Max time @ 10BT: 1500*8b/10Mbps == 1200us (+ 100us margin)
 483                  * Typically expect this loop to end in < 50 us on 100BT.
 484                  */
 485                 while (--i && (ioread32(ioaddr + CSR5) & (CSR5_TS|CSR5_RS)))
 486                         udelay(10);
 487
 488                 if (!i)
 489                         printk(KERN_DEBUG "%s: tulip_stop_rxtx() failed"
 490                                         " (CSR5 0x%x CSR6 0x%x)\n",
 491                                         pci_name(tp->pdev),
 492                                         ioread32(ioaddr + CSR5),
 493                                         ioread32(ioaddr + CSR6));
 494         }
 495 }
 496
 497 static inline void tulip_restart_rxtx(struct tulip_private *tp)
 498 {
 499         tulip_stop_rxtx(tp);
 500         udelay(5);
 501         tulip_start_rxtx(tp);
 502 }
 503
 504 static inline void tulip_tx_timeout_complete(struct tulip_private *tp, void __iomem *ioaddr)
 505 {
 506         /* Stop and restart the chip's Tx processes. */
 507         tulip_restart_rxtx(tp);
 508         /* Trigger an immediate transmit demand. */
 509         iowrite32(0, ioaddr + CSR1);
 510
 511         tp->stats.tx_errors++;
 512 }
 513
 514 #endif /* __NET_TULIP_H__ */