drivers/net/ethernet/amd/declance.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
writereg
load_csrs
cp_to_buf
cp_from_buf
lance_init_ring
init_restart_lance
lance_rx
lance_tx
lance_dma_merr_int
lance_interrupt
lance_open
lance_close
lance_reset
lance_tx_timeout
lance_start_xmit
lance_load_multicast
lance_set_multicast
lance_set_multicast_retry
dec_lance_probe
dec_lance_platform_probe
dec_lance_platform_remove
dec_lance_tc_probe
dec_lance_remove
dec_lance_tc_remove
dec_lance_init
dec_lance_exit
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *    Lance ethernet driver for the MIPS processor based
   4  *      DECstation family
   5  *
   6  *
   7  *      adopted from sunlance.c by Richard van den Berg
   8  *
   9  *      Copyright (C) 2002, 2003, 2005, 2006  Maciej W. Rozycki
  10  *
  11  *      additional sources:
  12  *      - PMAD-AA TURBOchannel Ethernet Module Functional Specification,
  13  *        Revision 1.2
  14  *
  15  *      History:
  16  *
  17  *      v0.001: The kernel accepts the code and it shows the hardware address.
  18  *
  19  *      v0.002: Removed most sparc stuff, left only some module and dma stuff.
  20  *
  21  *      v0.003: Enhanced base address calculation from proposals by
  22  *              Harald Koerfgen and Thomas Riemer.
  23  *
  24  *      v0.004: lance-regs is pointing at the right addresses, added prom
  25  *              check. First start of address mapping and DMA.
  26  *
  27  *      v0.005: started to play around with LANCE-DMA. This driver will not
  28  *              work for non IOASIC lances. HK
  29  *
  30  *      v0.006: added pointer arrays to lance_private and setup routine for
  31  *              them in dec_lance_init. HK
  32  *
  33  *      v0.007: Big shit. The LANCE seems to use a different DMA mechanism to
  34  *              access the init block. This looks like one (short) word at a
  35  *              time, but the smallest amount the IOASIC can transfer is a
  36  *              (long) word. So we have a 2-2 padding here. Changed
  37  *              lance_init_block accordingly. The 16-16 padding for the buffers
  38  *              seems to be correct. HK
  39  *
  40  *      v0.008: mods to make PMAX_LANCE work. 01/09/1999 triemer
  41  *
  42  *      v0.009: Module support fixes, multiple interfaces support, various
  43  *              bits. macro
  44  *
  45  *      v0.010: Fixes for the PMAD mapping of the LANCE buffer and for the
  46  *              PMAX requirement to only use halfword accesses to the
  47  *              buffer. macro
  48  *
  49  *      v0.011: Converted the PMAD to the driver model. macro
  50  */
  51 
  52 #include <linux/crc32.h>
  53 #include <linux/delay.h>
  54 #include <linux/errno.h>
  55 #include <linux/if_ether.h>
  56 #include <linux/init.h>
  57 #include <linux/kernel.h>
  58 #include <linux/module.h>
  59 #include <linux/netdevice.h>
  60 #include <linux/etherdevice.h>
  61 #include <linux/spinlock.h>
  62 #include <linux/stddef.h>
  63 #include <linux/string.h>
  64 #include <linux/tc.h>
  65 #include <linux/types.h>
  66 
  67 #include <asm/addrspace.h>
  68 
  69 #include <asm/dec/interrupts.h>
  70 #include <asm/dec/ioasic.h>
  71 #include <asm/dec/ioasic_addrs.h>
  72 #include <asm/dec/kn01.h>
  73 #include <asm/dec/machtype.h>
  74 #include <asm/dec/system.h>
  75 
  76 static const char version[] =
  77 "declance.c: v0.011 by Linux MIPS DECstation task force\n";
  78 
  79 MODULE_AUTHOR("Linux MIPS DECstation task force");
  80 MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
  81 MODULE_LICENSE("GPL");
  82 
  83 #define __unused __attribute__ ((unused))
  84 
  85 /*
  86  * card types
  87  */
  88 #define ASIC_LANCE 1
  89 #define PMAD_LANCE 2
  90 #define PMAX_LANCE 3
  91 
  92 
  93 #define LE_CSR0 0
  94 #define LE_CSR1 1
  95 #define LE_CSR2 2
  96 #define LE_CSR3 3
  97 
  98 #define LE_MO_PROM      0x8000  /* Enable promiscuous mode */
  99 
 100 #define LE_C0_ERR       0x8000  /* Error: set if BAB, SQE, MISS or ME is set */
 101 #define LE_C0_BABL      0x4000  /* BAB:  Babble: tx timeout. */
 102 #define LE_C0_CERR      0x2000  /* SQE:  Signal quality error */
 103 #define LE_C0_MISS      0x1000  /* MISS: Missed a packet */
 104 #define LE_C0_MERR      0x0800  /* ME:   Memory error */
 105 #define LE_C0_RINT      0x0400  /* Received interrupt */
 106 #define LE_C0_TINT      0x0200  /* Transmitter Interrupt */
 107 #define LE_C0_IDON      0x0100  /* IFIN: Init finished. */
 108 #define LE_C0_INTR      0x0080  /* Interrupt or error */
 109 #define LE_C0_INEA      0x0040  /* Interrupt enable */
 110 #define LE_C0_RXON      0x0020  /* Receiver on */
 111 #define LE_C0_TXON      0x0010  /* Transmitter on */
 112 #define LE_C0_TDMD      0x0008  /* Transmitter demand */
 113 #define LE_C0_STOP      0x0004  /* Stop the card */
 114 #define LE_C0_STRT      0x0002  /* Start the card */
 115 #define LE_C0_INIT      0x0001  /* Init the card */
 116 
 117 #define LE_C3_BSWP      0x4     /* SWAP */
 118 #define LE_C3_ACON      0x2     /* ALE Control */
 119 #define LE_C3_BCON      0x1     /* Byte control */
 120 
 121 /* Receive message descriptor 1 */
 122 #define LE_R1_OWN       0x8000  /* Who owns the entry */
 123 #define LE_R1_ERR       0x4000  /* Error: if FRA, OFL, CRC or BUF is set */
 124 #define LE_R1_FRA       0x2000  /* FRA: Frame error */
 125 #define LE_R1_OFL       0x1000  /* OFL: Frame overflow */
 126 #define LE_R1_CRC       0x0800  /* CRC error */
 127 #define LE_R1_BUF       0x0400  /* BUF: Buffer error */
 128 #define LE_R1_SOP       0x0200  /* Start of packet */
 129 #define LE_R1_EOP       0x0100  /* End of packet */
 130 #define LE_R1_POK       0x0300  /* Packet is complete: SOP + EOP */
 131 
 132 /* Transmit message descriptor 1 */
 133 #define LE_T1_OWN       0x8000  /* Lance owns the packet */
 134 #define LE_T1_ERR       0x4000  /* Error summary */
 135 #define LE_T1_EMORE     0x1000  /* Error: more than one retry needed */
 136 #define LE_T1_EONE      0x0800  /* Error: one retry needed */
 137 #define LE_T1_EDEF      0x0400  /* Error: deferred */
 138 #define LE_T1_SOP       0x0200  /* Start of packet */
 139 #define LE_T1_EOP       0x0100  /* End of packet */
 140 #define LE_T1_POK       0x0300  /* Packet is complete: SOP + EOP */
 141 
 142 #define LE_T3_BUF       0x8000  /* Buffer error */
 143 #define LE_T3_UFL       0x4000  /* Error underflow */
 144 #define LE_T3_LCOL      0x1000  /* Error late collision */
 145 #define LE_T3_CLOS      0x0800  /* Error carrier loss */
 146 #define LE_T3_RTY       0x0400  /* Error retry */
 147 #define LE_T3_TDR       0x03ff  /* Time Domain Reflectometry counter */
 148 
 149 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
 150 
 151 #ifndef LANCE_LOG_TX_BUFFERS
 152 #define LANCE_LOG_TX_BUFFERS 4
 153 #define LANCE_LOG_RX_BUFFERS 4
 154 #endif
 155 
 156 #define TX_RING_SIZE                    (1 << (LANCE_LOG_TX_BUFFERS))
 157 #define TX_RING_MOD_MASK                (TX_RING_SIZE - 1)
 158 
 159 #define RX_RING_SIZE                    (1 << (LANCE_LOG_RX_BUFFERS))
 160 #define RX_RING_MOD_MASK                (RX_RING_SIZE - 1)
 161 
 162 #define PKT_BUF_SZ              1536
 163 #define RX_BUFF_SIZE            PKT_BUF_SZ
 164 #define TX_BUFF_SIZE            PKT_BUF_SZ
 165 
 166 #undef TEST_HITS
 167 #define ZERO 0
 168 
 169 /*
 170  * The DS2100/3100 have a linear 64 kB buffer which supports halfword
 171  * accesses only.  Each halfword of the buffer is word-aligned in the
 172  * CPU address space.
 173  *
 174  * The PMAD-AA has a 128 kB buffer on-board.
 175  *
 176  * The IOASIC LANCE devices use a shared memory region.  This region
 177  * as seen from the CPU is (max) 128 kB long and has to be on an 128 kB
 178  * boundary.  The LANCE sees this as a 64 kB long continuous memory
 179  * region.
 180  *
 181  * The LANCE's DMA address is used as an index in this buffer and DMA
 182  * takes place in bursts of eight 16-bit words which are packed into
 183  * four 32-bit words by the IOASIC.  This leads to a strange padding:
 184  * 16 bytes of valid data followed by a 16 byte gap :-(.
 185  */
 186 
 187 struct lance_rx_desc {
 188         unsigned short rmd0;            /* low address of packet */
 189         unsigned short rmd1;            /* high address of packet
 190                                            and descriptor bits */
 191         short length;                   /* 2s complement (negative!)
 192                                            of buffer length */
 193         unsigned short mblength;        /* actual number of bytes received */
 194 };
 195 
 196 struct lance_tx_desc {
 197         unsigned short tmd0;            /* low address of packet */
 198         unsigned short tmd1;            /* high address of packet
 199                                            and descriptor bits */
 200         short length;                   /* 2s complement (negative!)
 201                                            of buffer length */
 202         unsigned short misc;
 203 };
 204 
 205 
 206 /* First part of the LANCE initialization block, described in databook. */
 207 struct lance_init_block {
 208         unsigned short mode;            /* pre-set mode (reg. 15) */
 209 
 210         unsigned short phys_addr[3];    /* physical ethernet address */
 211         unsigned short filter[4];       /* multicast filter */
 212 
 213         /* Receive and transmit ring base, along with extra bits. */
 214         unsigned short rx_ptr;          /* receive descriptor addr */
 215         unsigned short rx_len;          /* receive len and high addr */
 216         unsigned short tx_ptr;          /* transmit descriptor addr */
 217         unsigned short tx_len;          /* transmit len and high addr */
 218 
 219         short gap[4];
 220 
 221         /* The buffer descriptors */
 222         struct lance_rx_desc brx_ring[RX_RING_SIZE];
 223         struct lance_tx_desc btx_ring[TX_RING_SIZE];
 224 };
 225 
 226 #define BUF_OFFSET_CPU sizeof(struct lance_init_block)
 227 #define BUF_OFFSET_LNC sizeof(struct lance_init_block)
 228 
 229 #define shift_off(off, type)                                            \
 230         (type == ASIC_LANCE || type == PMAX_LANCE ? off << 1 : off)
 231 
 232 #define lib_off(rt, type)                                               \
 233         shift_off(offsetof(struct lance_init_block, rt), type)
 234 
 235 #define lib_ptr(ib, rt, type)                                           \
 236         ((volatile u16 *)((u8 *)(ib) + lib_off(rt, type)))
 237 
 238 #define rds_off(rt, type)                                               \
 239         shift_off(offsetof(struct lance_rx_desc, rt), type)
 240 
 241 #define rds_ptr(rd, rt, type)                                           \
 242         ((volatile u16 *)((u8 *)(rd) + rds_off(rt, type)))
 243 
 244 #define tds_off(rt, type)                                               \
 245         shift_off(offsetof(struct lance_tx_desc, rt), type)
 246 
 247 #define tds_ptr(td, rt, type)                                           \
 248         ((volatile u16 *)((u8 *)(td) + tds_off(rt, type)))
 249 
 250 struct lance_private {
 251         struct net_device *next;
 252         int type;
 253         int dma_irq;
 254         volatile struct lance_regs *ll;
 255 
 256         spinlock_t      lock;
 257 
 258         int rx_new, tx_new;
 259         int rx_old, tx_old;
 260 
 261         unsigned short busmaster_regval;
 262 
 263         struct timer_list       multicast_timer;
 264         struct net_device       *dev;
 265 
 266         /* Pointers to the ring buffers as seen from the CPU */
 267         char *rx_buf_ptr_cpu[RX_RING_SIZE];
 268         char *tx_buf_ptr_cpu[TX_RING_SIZE];
 269 
 270         /* Pointers to the ring buffers as seen from the LANCE */
 271         uint rx_buf_ptr_lnc[RX_RING_SIZE];
 272         uint tx_buf_ptr_lnc[TX_RING_SIZE];
 273 };
 274 
 275 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
 276                         lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
 277                         lp->tx_old - lp->tx_new-1)
 278 
 279 /* The lance control ports are at an absolute address, machine and tc-slot
 280  * dependent.
 281  * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
 282  * so we have to give the structure an extra member making rap pointing
 283  * at the right address
 284  */
 285 struct lance_regs {
 286         volatile unsigned short rdp;    /* register data port */
 287         unsigned short pad;
 288         volatile unsigned short rap;    /* register address port */
 289 };
 290 
 291 int dec_lance_debug = 2;
 292 
 293 static struct tc_driver dec_lance_tc_driver;
 294 static struct net_device *root_lance_dev;
 295 
 296 static inline void writereg(volatile unsigned short *regptr, short value)
 297 {
 298         *regptr = value;
 299         iob();
 300 }
 301 
 302 /* Load the CSR registers */
 303 static void load_csrs(struct lance_private *lp)
 304 {
 305         volatile struct lance_regs *ll = lp->ll;
 306         uint leptr;
 307 
 308         /* The address space as seen from the LANCE
 309          * begins at address 0. HK
 310          */
 311         leptr = 0;
 312 
 313         writereg(&ll->rap, LE_CSR1);
 314         writereg(&ll->rdp, (leptr & 0xFFFF));
 315         writereg(&ll->rap, LE_CSR2);
 316         writereg(&ll->rdp, leptr >> 16);
 317         writereg(&ll->rap, LE_CSR3);
 318         writereg(&ll->rdp, lp->busmaster_regval);
 319 
 320         /* Point back to csr0 */
 321         writereg(&ll->rap, LE_CSR0);
 322 }
 323 
 324 /*
 325  * Our specialized copy routines
 326  *
 327  */
 328 static void cp_to_buf(const int type, void *to, const void *from, int len)
 329 {
 330         unsigned short *tp;
 331         const unsigned short *fp;
 332         unsigned short clen;
 333         unsigned char *rtp;
 334         const unsigned char *rfp;
 335 
 336         if (type == PMAD_LANCE) {
 337                 memcpy(to, from, len);
 338         } else if (type == PMAX_LANCE) {
 339                 clen = len >> 1;
 340                 tp = to;
 341                 fp = from;
 342 
 343                 while (clen--) {
 344                         *tp++ = *fp++;
 345                         tp++;
 346                 }
 347 
 348                 clen = len & 1;
 349                 rtp = (unsigned char *)tp;
 350                 rfp = (const unsigned char *)fp;
 351                 while (clen--) {
 352                         *rtp++ = *rfp++;
 353                 }
 354         } else {
 355                 /*
 356                  * copy 16 Byte chunks
 357                  */
 358                 clen = len >> 4;
 359                 tp = to;
 360                 fp = from;
 361                 while (clen--) {
 362                         *tp++ = *fp++;
 363                         *tp++ = *fp++;
 364                         *tp++ = *fp++;
 365                         *tp++ = *fp++;
 366                         *tp++ = *fp++;
 367                         *tp++ = *fp++;
 368                         *tp++ = *fp++;
 369                         *tp++ = *fp++;
 370                         tp += 8;
 371                 }
 372 
 373                 /*
 374                  * do the rest, if any.
 375                  */
 376                 clen = len & 15;
 377                 rtp = (unsigned char *)tp;
 378                 rfp = (const unsigned char *)fp;
 379                 while (clen--) {
 380                         *rtp++ = *rfp++;
 381                 }
 382         }
 383 
 384         iob();
 385 }
 386 
 387 static void cp_from_buf(const int type, void *to, const void *from, int len)
 388 {
 389         unsigned short *tp;
 390         const unsigned short *fp;
 391         unsigned short clen;
 392         unsigned char *rtp;
 393         const unsigned char *rfp;
 394 
 395         if (type == PMAD_LANCE) {
 396                 memcpy(to, from, len);
 397         } else if (type == PMAX_LANCE) {
 398                 clen = len >> 1;
 399                 tp = to;
 400                 fp = from;
 401                 while (clen--) {
 402                         *tp++ = *fp++;
 403                         fp++;
 404                 }
 405 
 406                 clen = len & 1;
 407 
 408                 rtp = (unsigned char *)tp;
 409                 rfp = (const unsigned char *)fp;
 410 
 411                 while (clen--) {
 412                         *rtp++ = *rfp++;
 413                 }
 414         } else {
 415 
 416                 /*
 417                  * copy 16 Byte chunks
 418                  */
 419                 clen = len >> 4;
 420                 tp = to;
 421                 fp = from;
 422                 while (clen--) {
 423                         *tp++ = *fp++;
 424                         *tp++ = *fp++;
 425                         *tp++ = *fp++;
 426                         *tp++ = *fp++;
 427                         *tp++ = *fp++;
 428                         *tp++ = *fp++;
 429                         *tp++ = *fp++;
 430                         *tp++ = *fp++;
 431                         fp += 8;
 432                 }
 433 
 434                 /*
 435                  * do the rest, if any.
 436                  */
 437                 clen = len & 15;
 438                 rtp = (unsigned char *)tp;
 439                 rfp = (const unsigned char *)fp;
 440                 while (clen--) {
 441                         *rtp++ = *rfp++;
 442                 }
 443 
 444 
 445         }
 446 
 447 }
 448 
 449 /* Setup the Lance Rx and Tx rings */
 450 static void lance_init_ring(struct net_device *dev)
 451 {
 452         struct lance_private *lp = netdev_priv(dev);
 453         volatile u16 *ib = (volatile u16 *)dev->mem_start;
 454         uint leptr;
 455         int i;
 456 
 457         /* Lock out other processes while setting up hardware */
 458         netif_stop_queue(dev);
 459         lp->rx_new = lp->tx_new = 0;
 460         lp->rx_old = lp->tx_old = 0;
 461 
 462         /* Copy the ethernet address to the lance init block.
 463          * XXX bit 0 of the physical address registers has to be zero
 464          */
 465         *lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) |
 466                                      dev->dev_addr[0];
 467         *lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) |
 468                                      dev->dev_addr[2];
 469         *lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) |
 470                                      dev->dev_addr[4];
 471         /* Setup the initialization block */
 472 
 473         /* Setup rx descriptor pointer */
 474         leptr = offsetof(struct lance_init_block, brx_ring);
 475         *lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) |
 476                                          (leptr >> 16);
 477         *lib_ptr(ib, rx_ptr, lp->type) = leptr;
 478         if (ZERO)
 479                 printk("RX ptr: %8.8x(%8.8x)\n",
 480                        leptr, (uint)lib_off(brx_ring, lp->type));
 481 
 482         /* Setup tx descriptor pointer */
 483         leptr = offsetof(struct lance_init_block, btx_ring);
 484         *lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) |
 485                                          (leptr >> 16);
 486         *lib_ptr(ib, tx_ptr, lp->type) = leptr;
 487         if (ZERO)
 488                 printk("TX ptr: %8.8x(%8.8x)\n",
 489                        leptr, (uint)lib_off(btx_ring, lp->type));
 490 
 491         if (ZERO)
 492                 printk("TX rings:\n");
 493 
 494         /* Setup the Tx ring entries */
 495         for (i = 0; i < TX_RING_SIZE; i++) {
 496                 leptr = lp->tx_buf_ptr_lnc[i];
 497                 *lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr;
 498                 *lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) &
 499                                                            0xff;
 500                 *lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000;
 501                                                 /* The ones required by tmd2 */
 502                 *lib_ptr(ib, btx_ring[i].misc, lp->type) = 0;
 503                 if (i < 3 && ZERO)
 504                         printk("%d: %8.8x(%p)\n",
 505                                i, leptr, lp->tx_buf_ptr_cpu[i]);
 506         }
 507 
 508         /* Setup the Rx ring entries */
 509         if (ZERO)
 510                 printk("RX rings:\n");
 511         for (i = 0; i < RX_RING_SIZE; i++) {
 512                 leptr = lp->rx_buf_ptr_lnc[i];
 513                 *lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr;
 514                 *lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) &
 515                                                             0xff) |
 516                                                            LE_R1_OWN;
 517                 *lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE |
 518                                                              0xf000;
 519                 *lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0;
 520                 if (i < 3 && ZERO)
 521                         printk("%d: %8.8x(%p)\n",
 522                                i, leptr, lp->rx_buf_ptr_cpu[i]);
 523         }
 524         iob();
 525 }
 526 
 527 static int init_restart_lance(struct lance_private *lp)
 528 {
 529         volatile struct lance_regs *ll = lp->ll;
 530         int i;
 531 
 532         writereg(&ll->rap, LE_CSR0);
 533         writereg(&ll->rdp, LE_C0_INIT);
 534 
 535         /* Wait for the lance to complete initialization */
 536         for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
 537                 udelay(10);
 538         }
 539         if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
 540                 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
 541                        i, ll->rdp);
 542                 return -1;
 543         }
 544         if ((ll->rdp & LE_C0_ERR)) {
 545                 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
 546                        i, ll->rdp);
 547                 return -1;
 548         }
 549         writereg(&ll->rdp, LE_C0_IDON);
 550         writereg(&ll->rdp, LE_C0_STRT);
 551         writereg(&ll->rdp, LE_C0_INEA);
 552 
 553         return 0;
 554 }
 555 
 556 static int lance_rx(struct net_device *dev)
 557 {
 558         struct lance_private *lp = netdev_priv(dev);
 559         volatile u16 *ib = (volatile u16 *)dev->mem_start;
 560         volatile u16 *rd;
 561         unsigned short bits;
 562         int entry, len;
 563         struct sk_buff *skb;
 564 
 565 #ifdef TEST_HITS
 566         {
 567                 int i;
 568 
 569                 printk("[");
 570                 for (i = 0; i < RX_RING_SIZE; i++) {
 571                         if (i == lp->rx_new)
 572                                 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
 573                                                       lp->type) &
 574                                              LE_R1_OWN ? "_" : "X");
 575                         else
 576                                 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
 577                                                       lp->type) &
 578                                              LE_R1_OWN ? "." : "1");
 579                 }
 580                 printk("]");
 581         }
 582 #endif
 583 
 584         for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type);
 585              !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN);
 586              rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) {
 587                 entry = lp->rx_new;
 588 
 589                 /* We got an incomplete frame? */
 590                 if ((bits & LE_R1_POK) != LE_R1_POK) {
 591                         dev->stats.rx_over_errors++;
 592                         dev->stats.rx_errors++;
 593                 } else if (bits & LE_R1_ERR) {
 594                         /* Count only the end frame as a rx error,
 595                          * not the beginning
 596                          */
 597                         if (bits & LE_R1_BUF)
 598                                 dev->stats.rx_fifo_errors++;
 599                         if (bits & LE_R1_CRC)
 600                                 dev->stats.rx_crc_errors++;
 601                         if (bits & LE_R1_OFL)
 602                                 dev->stats.rx_over_errors++;
 603                         if (bits & LE_R1_FRA)
 604                                 dev->stats.rx_frame_errors++;
 605                         if (bits & LE_R1_EOP)
 606                                 dev->stats.rx_errors++;
 607                 } else {
 608                         len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
 609                         skb = netdev_alloc_skb(dev, len + 2);
 610 
 611                         if (skb == 0) {
 612                                 dev->stats.rx_dropped++;
 613                                 *rds_ptr(rd, mblength, lp->type) = 0;
 614                                 *rds_ptr(rd, rmd1, lp->type) =
 615                                         ((lp->rx_buf_ptr_lnc[entry] >> 16) &
 616                                          0xff) | LE_R1_OWN;
 617                                 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
 618                                 return 0;
 619                         }
 620                         dev->stats.rx_bytes += len;
 621 
 622                         skb_reserve(skb, 2);    /* 16 byte align */
 623                         skb_put(skb, len);      /* make room */
 624 
 625                         cp_from_buf(lp->type, skb->data,
 626                                     lp->rx_buf_ptr_cpu[entry], len);
 627 
 628                         skb->protocol = eth_type_trans(skb, dev);
 629                         netif_rx(skb);
 630                         dev->stats.rx_packets++;
 631                 }
 632 
 633                 /* Return the packet to the pool */
 634                 *rds_ptr(rd, mblength, lp->type) = 0;
 635                 *rds_ptr(rd, length, lp->type) = -RX_BUFF_SIZE | 0xf000;
 636                 *rds_ptr(rd, rmd1, lp->type) =
 637                         ((lp->rx_buf_ptr_lnc[entry] >> 16) & 0xff) | LE_R1_OWN;
 638                 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
 639         }
 640         return 0;
 641 }
 642 
 643 static void lance_tx(struct net_device *dev)
 644 {
 645         struct lance_private *lp = netdev_priv(dev);
 646         volatile u16 *ib = (volatile u16 *)dev->mem_start;
 647         volatile struct lance_regs *ll = lp->ll;
 648         volatile u16 *td;
 649         int i, j;
 650         int status;
 651 
 652         j = lp->tx_old;
 653 
 654         spin_lock(&lp->lock);
 655 
 656         for (i = j; i != lp->tx_new; i = j) {
 657                 td = lib_ptr(ib, btx_ring[i], lp->type);
 658                 /* If we hit a packet not owned by us, stop */
 659                 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_OWN)
 660                         break;
 661 
 662                 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_ERR) {
 663                         status = *tds_ptr(td, misc, lp->type);
 664 
 665                         dev->stats.tx_errors++;
 666                         if (status & LE_T3_RTY)
 667                                 dev->stats.tx_aborted_errors++;
 668                         if (status & LE_T3_LCOL)
 669                                 dev->stats.tx_window_errors++;
 670 
 671                         if (status & LE_T3_CLOS) {
 672                                 dev->stats.tx_carrier_errors++;
 673                                 printk("%s: Carrier Lost\n", dev->name);
 674                                 /* Stop the lance */
 675                                 writereg(&ll->rap, LE_CSR0);
 676                                 writereg(&ll->rdp, LE_C0_STOP);
 677                                 lance_init_ring(dev);
 678                                 load_csrs(lp);
 679                                 init_restart_lance(lp);
 680                                 goto out;
 681                         }
 682                         /* Buffer errors and underflows turn off the
 683                          * transmitter, restart the adapter.
 684                          */
 685                         if (status & (LE_T3_BUF | LE_T3_UFL)) {
 686                                 dev->stats.tx_fifo_errors++;
 687 
 688                                 printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
 689                                        dev->name);
 690                                 /* Stop the lance */
 691                                 writereg(&ll->rap, LE_CSR0);
 692                                 writereg(&ll->rdp, LE_C0_STOP);
 693                                 lance_init_ring(dev);
 694                                 load_csrs(lp);
 695                                 init_restart_lance(lp);
 696                                 goto out;
 697                         }
 698                 } else if ((*tds_ptr(td, tmd1, lp->type) & LE_T1_POK) ==
 699                            LE_T1_POK) {
 700                         /*
 701                          * So we don't count the packet more than once.
 702                          */
 703                         *tds_ptr(td, tmd1, lp->type) &= ~(LE_T1_POK);
 704 
 705                         /* One collision before packet was sent. */
 706                         if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EONE)
 707                                 dev->stats.collisions++;
 708 
 709                         /* More than one collision, be optimistic. */
 710                         if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE)
 711                                 dev->stats.collisions += 2;
 712 
 713                         dev->stats.tx_packets++;
 714                 }
 715                 j = (j + 1) & TX_RING_MOD_MASK;
 716         }
 717         lp->tx_old = j;
 718 out:
 719         if (netif_queue_stopped(dev) &&
 720             TX_BUFFS_AVAIL > 0)
 721                 netif_wake_queue(dev);
 722 
 723         spin_unlock(&lp->lock);
 724 }
 725 
 726 static irqreturn_t lance_dma_merr_int(int irq, void *dev_id)
 727 {
 728         struct net_device *dev = dev_id;
 729 
 730         printk(KERN_ERR "%s: DMA error\n", dev->name);
 731         return IRQ_HANDLED;
 732 }
 733 
 734 static irqreturn_t lance_interrupt(int irq, void *dev_id)
 735 {
 736         struct net_device *dev = dev_id;
 737         struct lance_private *lp = netdev_priv(dev);
 738         volatile struct lance_regs *ll = lp->ll;
 739         int csr0;
 740 
 741         writereg(&ll->rap, LE_CSR0);
 742         csr0 = ll->rdp;
 743 
 744         /* Acknowledge all the interrupt sources ASAP */
 745         writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
 746 
 747         if ((csr0 & LE_C0_ERR)) {
 748                 /* Clear the error condition */
 749                 writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
 750                          LE_C0_CERR | LE_C0_MERR);
 751         }
 752         if (csr0 & LE_C0_RINT)
 753                 lance_rx(dev);
 754 
 755         if (csr0 & LE_C0_TINT)
 756                 lance_tx(dev);
 757 
 758         if (csr0 & LE_C0_BABL)
 759                 dev->stats.tx_errors++;
 760 
 761         if (csr0 & LE_C0_MISS)
 762                 dev->stats.rx_errors++;
 763 
 764         if (csr0 & LE_C0_MERR) {
 765                 printk("%s: Memory error, status %04x\n", dev->name, csr0);
 766 
 767                 writereg(&ll->rdp, LE_C0_STOP);
 768 
 769                 lance_init_ring(dev);
 770                 load_csrs(lp);
 771                 init_restart_lance(lp);
 772                 netif_wake_queue(dev);
 773         }
 774 
 775         writereg(&ll->rdp, LE_C0_INEA);
 776         writereg(&ll->rdp, LE_C0_INEA);
 777         return IRQ_HANDLED;
 778 }
 779 
 780 static int lance_open(struct net_device *dev)
 781 {
 782         volatile u16 *ib = (volatile u16 *)dev->mem_start;
 783         struct lance_private *lp = netdev_priv(dev);
 784         volatile struct lance_regs *ll = lp->ll;
 785         int status = 0;
 786 
 787         /* Stop the Lance */
 788         writereg(&ll->rap, LE_CSR0);
 789         writereg(&ll->rdp, LE_C0_STOP);
 790 
 791         /* Set mode and clear multicast filter only at device open,
 792          * so that lance_init_ring() called at any error will not
 793          * forget multicast filters.
 794          *
 795          * BTW it is common bug in all lance drivers! --ANK
 796          */
 797         *lib_ptr(ib, mode, lp->type) = 0;
 798         *lib_ptr(ib, filter[0], lp->type) = 0;
 799         *lib_ptr(ib, filter[1], lp->type) = 0;
 800         *lib_ptr(ib, filter[2], lp->type) = 0;
 801         *lib_ptr(ib, filter[3], lp->type) = 0;
 802 
 803         lance_init_ring(dev);
 804         load_csrs(lp);
 805 
 806         netif_start_queue(dev);
 807 
 808         /* Associate IRQ with lance_interrupt */
 809         if (request_irq(dev->irq, lance_interrupt, 0, "lance", dev)) {
 810                 printk("%s: Can't get IRQ %d\n", dev->name, dev->irq);
 811                 return -EAGAIN;
 812         }
 813         if (lp->dma_irq >= 0) {
 814                 unsigned long flags;
 815 
 816                 if (request_irq(lp->dma_irq, lance_dma_merr_int, IRQF_ONESHOT,
 817                                 "lance error", dev)) {
 818                         free_irq(dev->irq, dev);
 819                         printk("%s: Can't get DMA IRQ %d\n", dev->name,
 820                                 lp->dma_irq);
 821                         return -EAGAIN;
 822                 }
 823 
 824                 spin_lock_irqsave(&ioasic_ssr_lock, flags);
 825 
 826                 fast_mb();
 827                 /* Enable I/O ASIC LANCE DMA.  */
 828                 ioasic_write(IO_REG_SSR,
 829                              ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN);
 830 
 831                 fast_mb();
 832                 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
 833         }
 834 
 835         status = init_restart_lance(lp);
 836         return status;
 837 }
 838 
 839 static int lance_close(struct net_device *dev)
 840 {
 841         struct lance_private *lp = netdev_priv(dev);
 842         volatile struct lance_regs *ll = lp->ll;
 843 
 844         netif_stop_queue(dev);
 845         del_timer_sync(&lp->multicast_timer);
 846 
 847         /* Stop the card */
 848         writereg(&ll->rap, LE_CSR0);
 849         writereg(&ll->rdp, LE_C0_STOP);
 850 
 851         if (lp->dma_irq >= 0) {
 852                 unsigned long flags;
 853 
 854                 spin_lock_irqsave(&ioasic_ssr_lock, flags);
 855 
 856                 fast_mb();
 857                 /* Disable I/O ASIC LANCE DMA.  */
 858                 ioasic_write(IO_REG_SSR,
 859                              ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN);
 860 
 861                 fast_iob();
 862                 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
 863 
 864                 free_irq(lp->dma_irq, dev);
 865         }
 866         free_irq(dev->irq, dev);
 867         return 0;
 868 }
 869 
 870 static inline int lance_reset(struct net_device *dev)
 871 {
 872         struct lance_private *lp = netdev_priv(dev);
 873         volatile struct lance_regs *ll = lp->ll;
 874         int status;
 875 
 876         /* Stop the lance */
 877         writereg(&ll->rap, LE_CSR0);
 878         writereg(&ll->rdp, LE_C0_STOP);
 879 
 880         lance_init_ring(dev);
 881         load_csrs(lp);
 882         netif_trans_update(dev); /* prevent tx timeout */
 883         status = init_restart_lance(lp);
 884         return status;
 885 }
 886 
 887 static void lance_tx_timeout(struct net_device *dev)
 888 {
 889         struct lance_private *lp = netdev_priv(dev);
 890         volatile struct lance_regs *ll = lp->ll;
 891 
 892         printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
 893                 dev->name, ll->rdp);
 894         lance_reset(dev);
 895         netif_wake_queue(dev);
 896 }
 897 
 898 static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
 899 {
 900         struct lance_private *lp = netdev_priv(dev);
 901         volatile struct lance_regs *ll = lp->ll;
 902         volatile u16 *ib = (volatile u16 *)dev->mem_start;
 903         unsigned long flags;
 904         int entry, len;
 905 
 906         len = skb->len;
 907 
 908         if (len < ETH_ZLEN) {
 909                 if (skb_padto(skb, ETH_ZLEN))
 910                         return NETDEV_TX_OK;
 911                 len = ETH_ZLEN;
 912         }
 913 
 914         dev->stats.tx_bytes += len;
 915 
 916         spin_lock_irqsave(&lp->lock, flags);
 917 
 918         entry = lp->tx_new;
 919         *lib_ptr(ib, btx_ring[entry].length, lp->type) = (-len);
 920         *lib_ptr(ib, btx_ring[entry].misc, lp->type) = 0;
 921 
 922         cp_to_buf(lp->type, lp->tx_buf_ptr_cpu[entry], skb->data, len);
 923 
 924         /* Now, give the packet to the lance */
 925         *lib_ptr(ib, btx_ring[entry].tmd1, lp->type) =
 926                 ((lp->tx_buf_ptr_lnc[entry] >> 16) & 0xff) |
 927                 (LE_T1_POK | LE_T1_OWN);
 928         lp->tx_new = (entry + 1) & TX_RING_MOD_MASK;
 929 
 930         if (TX_BUFFS_AVAIL <= 0)
 931                 netif_stop_queue(dev);
 932 
 933         /* Kick the lance: transmit now */
 934         writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
 935 
 936         spin_unlock_irqrestore(&lp->lock, flags);
 937 
 938         dev_kfree_skb(skb);
 939 
 940         return NETDEV_TX_OK;
 941 }
 942 
 943 static void lance_load_multicast(struct net_device *dev)
 944 {
 945         struct lance_private *lp = netdev_priv(dev);
 946         volatile u16 *ib = (volatile u16 *)dev->mem_start;
 947         struct netdev_hw_addr *ha;
 948         u32 crc;
 949 
 950         /* set all multicast bits */
 951         if (dev->flags & IFF_ALLMULTI) {
 952                 *lib_ptr(ib, filter[0], lp->type) = 0xffff;
 953                 *lib_ptr(ib, filter[1], lp->type) = 0xffff;
 954                 *lib_ptr(ib, filter[2], lp->type) = 0xffff;
 955                 *lib_ptr(ib, filter[3], lp->type) = 0xffff;
 956                 return;
 957         }
 958         /* clear the multicast filter */
 959         *lib_ptr(ib, filter[0], lp->type) = 0;
 960         *lib_ptr(ib, filter[1], lp->type) = 0;
 961         *lib_ptr(ib, filter[2], lp->type) = 0;
 962         *lib_ptr(ib, filter[3], lp->type) = 0;
 963 
 964         /* Add addresses */
 965         netdev_for_each_mc_addr(ha, dev) {
 966                 crc = ether_crc_le(ETH_ALEN, ha->addr);
 967                 crc = crc >> 26;
 968                 *lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf);
 969         }
 970 }
 971 
 972 static void lance_set_multicast(struct net_device *dev)
 973 {
 974         struct lance_private *lp = netdev_priv(dev);
 975         volatile u16 *ib = (volatile u16 *)dev->mem_start;
 976         volatile struct lance_regs *ll = lp->ll;
 977 
 978         if (!netif_running(dev))
 979                 return;
 980 
 981         if (lp->tx_old != lp->tx_new) {
 982                 mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100);
 983                 netif_wake_queue(dev);
 984                 return;
 985         }
 986 
 987         netif_stop_queue(dev);
 988 
 989         writereg(&ll->rap, LE_CSR0);
 990         writereg(&ll->rdp, LE_C0_STOP);
 991 
 992         lance_init_ring(dev);
 993 
 994         if (dev->flags & IFF_PROMISC) {
 995                 *lib_ptr(ib, mode, lp->type) |= LE_MO_PROM;
 996         } else {
 997                 *lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM;
 998                 lance_load_multicast(dev);
 999         }
1000         load_csrs(lp);
1001         init_restart_lance(lp);
1002         netif_wake_queue(dev);
1003 }
1004 
1005 static void lance_set_multicast_retry(struct timer_list *t)
1006 {
1007         struct lance_private *lp = from_timer(lp, t, multicast_timer);
1008         struct net_device *dev = lp->dev;
1009 
1010         lance_set_multicast(dev);
1011 }
1012 
1013 static const struct net_device_ops lance_netdev_ops = {
1014         .ndo_open               = lance_open,
1015         .ndo_stop               = lance_close,
1016         .ndo_start_xmit         = lance_start_xmit,
1017         .ndo_tx_timeout         = lance_tx_timeout,
1018         .ndo_set_rx_mode        = lance_set_multicast,
1019         .ndo_validate_addr      = eth_validate_addr,
1020         .ndo_set_mac_address    = eth_mac_addr,
1021 };
1022 
1023 static int dec_lance_probe(struct device *bdev, const int type)
1024 {
1025         static unsigned version_printed;
1026         static const char fmt[] = "declance%d";
1027         char name[10];
1028         struct net_device *dev;
1029         struct lance_private *lp;
1030         volatile struct lance_regs *ll;
1031         resource_size_t start = 0, len = 0;
1032         int i, ret;
1033         unsigned long esar_base;
1034         unsigned char *esar;
1035         const char *desc;
1036 
1037         if (dec_lance_debug && version_printed++ == 0)
1038                 printk(version);
1039 
1040         if (bdev)
1041                 snprintf(name, sizeof(name), "%s", dev_name(bdev));
1042         else {
1043                 i = 0;
1044                 dev = root_lance_dev;
1045                 while (dev) {
1046                         i++;
1047                         lp = netdev_priv(dev);
1048                         dev = lp->next;
1049                 }
1050                 snprintf(name, sizeof(name), fmt, i);
1051         }
1052 
1053         dev = alloc_etherdev(sizeof(struct lance_private));
1054         if (!dev) {
1055                 ret = -ENOMEM;
1056                 goto err_out;
1057         }
1058 
1059         /*
1060          * alloc_etherdev ensures the data structures used by the LANCE
1061          * are aligned.
1062          */
1063         lp = netdev_priv(dev);
1064         spin_lock_init(&lp->lock);
1065 
1066         lp->type = type;
1067         switch (type) {
1068         case ASIC_LANCE:
1069                 dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
1070 
1071                 /* buffer space for the on-board LANCE shared memory */
1072                 /*
1073                  * FIXME: ugly hack!
1074                  */
1075                 dev->mem_start = CKSEG1ADDR(0x00020000);
1076                 dev->mem_end = dev->mem_start + 0x00020000;
1077                 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1078                 esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
1079 
1080                 /* Workaround crash with booting KN04 2.1k from Disk */
1081                 memset((void *)dev->mem_start, 0,
1082                        dev->mem_end - dev->mem_start);
1083 
1084                 /*
1085                  * setup the pointer arrays, this sucks [tm] :-(
1086                  */
1087                 for (i = 0; i < RX_RING_SIZE; i++) {
1088                         lp->rx_buf_ptr_cpu[i] =
1089                                 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1090                                          2 * i * RX_BUFF_SIZE);
1091                         lp->rx_buf_ptr_lnc[i] =
1092                                 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1093                 }
1094                 for (i = 0; i < TX_RING_SIZE; i++) {
1095                         lp->tx_buf_ptr_cpu[i] =
1096                                 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1097                                          2 * RX_RING_SIZE * RX_BUFF_SIZE +
1098                                          2 * i * TX_BUFF_SIZE);
1099                         lp->tx_buf_ptr_lnc[i] =
1100                                 (BUF_OFFSET_LNC +
1101                                  RX_RING_SIZE * RX_BUFF_SIZE +
1102                                  i * TX_BUFF_SIZE);
1103                 }
1104 
1105                 /* Setup I/O ASIC LANCE DMA.  */
1106                 lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1107                 ioasic_write(IO_REG_LANCE_DMA_P,
1108                              CPHYSADDR(dev->mem_start) << 3);
1109 
1110                 break;
1111 #ifdef CONFIG_TC
1112         case PMAD_LANCE:
1113                 dev_set_drvdata(bdev, dev);
1114 
1115                 start = to_tc_dev(bdev)->resource.start;
1116                 len = to_tc_dev(bdev)->resource.end - start + 1;
1117                 if (!request_mem_region(start, len, dev_name(bdev))) {
1118                         printk(KERN_ERR
1119                                "%s: Unable to reserve MMIO resource\n",
1120                                dev_name(bdev));
1121                         ret = -EBUSY;
1122                         goto err_out_dev;
1123                 }
1124 
1125                 dev->mem_start = CKSEG1ADDR(start);
1126                 dev->mem_end = dev->mem_start + 0x100000;
1127                 dev->base_addr = dev->mem_start + 0x100000;
1128                 dev->irq = to_tc_dev(bdev)->interrupt;
1129                 esar_base = dev->mem_start + 0x1c0002;
1130                 lp->dma_irq = -1;
1131 
1132                 for (i = 0; i < RX_RING_SIZE; i++) {
1133                         lp->rx_buf_ptr_cpu[i] =
1134                                 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1135                                          i * RX_BUFF_SIZE);
1136                         lp->rx_buf_ptr_lnc[i] =
1137                                 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1138                 }
1139                 for (i = 0; i < TX_RING_SIZE; i++) {
1140                         lp->tx_buf_ptr_cpu[i] =
1141                                 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1142                                          RX_RING_SIZE * RX_BUFF_SIZE +
1143                                          i * TX_BUFF_SIZE);
1144                         lp->tx_buf_ptr_lnc[i] =
1145                                 (BUF_OFFSET_LNC +
1146                                  RX_RING_SIZE * RX_BUFF_SIZE +
1147                                  i * TX_BUFF_SIZE);
1148                 }
1149 
1150                 break;
1151 #endif
1152         case PMAX_LANCE:
1153                 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1154                 dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1155                 dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
1156                 dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
1157                 esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
1158                 lp->dma_irq = -1;
1159 
1160                 /*
1161                  * setup the pointer arrays, this sucks [tm] :-(
1162                  */
1163                 for (i = 0; i < RX_RING_SIZE; i++) {
1164                         lp->rx_buf_ptr_cpu[i] =
1165                                 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1166                                          2 * i * RX_BUFF_SIZE);
1167                         lp->rx_buf_ptr_lnc[i] =
1168                                 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1169                 }
1170                 for (i = 0; i < TX_RING_SIZE; i++) {
1171                         lp->tx_buf_ptr_cpu[i] =
1172                                 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1173                                          2 * RX_RING_SIZE * RX_BUFF_SIZE +
1174                                          2 * i * TX_BUFF_SIZE);
1175                         lp->tx_buf_ptr_lnc[i] =
1176                                 (BUF_OFFSET_LNC +
1177                                  RX_RING_SIZE * RX_BUFF_SIZE +
1178                                  i * TX_BUFF_SIZE);
1179                 }
1180 
1181                 break;
1182 
1183         default:
1184                 printk(KERN_ERR "%s: declance_init called with unknown type\n",
1185                         name);
1186                 ret = -ENODEV;
1187                 goto err_out_dev;
1188         }
1189 
1190         ll = (struct lance_regs *) dev->base_addr;
1191         esar = (unsigned char *) esar_base;
1192 
1193         /* prom checks */
1194         /* First, check for test pattern */
1195         if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1196             esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1197                 printk(KERN_ERR
1198                         "%s: Ethernet station address prom not found!\n",
1199                         name);
1200                 ret = -ENODEV;
1201                 goto err_out_resource;
1202         }
1203         /* Check the prom contents */
1204         for (i = 0; i < 8; i++) {
1205                 if (esar[i * 4] != esar[0x3c - i * 4] &&
1206                     esar[i * 4] != esar[0x40 + i * 4] &&
1207                     esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1208                         printk(KERN_ERR "%s: Something is wrong with the "
1209                                 "ethernet station address prom!\n", name);
1210                         ret = -ENODEV;
1211                         goto err_out_resource;
1212                 }
1213         }
1214 
1215         /* Copy the ethernet address to the device structure, later to the
1216          * lance initialization block so the lance gets it every time it's
1217          * (re)initialized.
1218          */
1219         switch (type) {
1220         case ASIC_LANCE:
1221                 desc = "IOASIC onboard LANCE";
1222                 break;
1223         case PMAD_LANCE:
1224                 desc = "PMAD-AA";
1225                 break;
1226         case PMAX_LANCE:
1227                 desc = "PMAX onboard LANCE";
1228                 break;
1229         }
1230         for (i = 0; i < 6; i++)
1231                 dev->dev_addr[i] = esar[i * 4];
1232 
1233         printk("%s: %s, addr = %pM, irq = %d\n",
1234                name, desc, dev->dev_addr, dev->irq);
1235 
1236         dev->netdev_ops = &lance_netdev_ops;
1237         dev->watchdog_timeo = 5*HZ;
1238 
1239         /* lp->ll is the location of the registers for lance card */
1240         lp->ll = ll;
1241 
1242         /* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1243          * specification.
1244          */
1245         lp->busmaster_regval = 0;
1246 
1247         dev->dma = 0;
1248 
1249         /* We cannot sleep if the chip is busy during a
1250          * multicast list update event, because such events
1251          * can occur from interrupts (ex. IPv6).  So we
1252          * use a timer to try again later when necessary. -DaveM
1253          */
1254         lp->dev = dev;
1255         timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
1256 
1257 
1258         ret = register_netdev(dev);
1259         if (ret) {
1260                 printk(KERN_ERR
1261                         "%s: Unable to register netdev, aborting.\n", name);
1262                 goto err_out_resource;
1263         }
1264 
1265         if (!bdev) {
1266                 lp->next = root_lance_dev;
1267                 root_lance_dev = dev;
1268         }
1269 
1270         printk("%s: registered as %s.\n", name, dev->name);
1271         return 0;
1272 
1273 err_out_resource:
1274         if (bdev)
1275                 release_mem_region(start, len);
1276 
1277 err_out_dev:
1278         free_netdev(dev);
1279 
1280 err_out:
1281         return ret;
1282 }
1283 
1284 /* Find all the lance cards on the system and initialize them */
1285 static int __init dec_lance_platform_probe(void)
1286 {
1287         int count = 0;
1288 
1289         if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1290                 if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
1291                         if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
1292                                 count++;
1293                 } else if (!TURBOCHANNEL) {
1294                         if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
1295                                 count++;
1296                 }
1297         }
1298 
1299         return (count > 0) ? 0 : -ENODEV;
1300 }
1301 
1302 static void __exit dec_lance_platform_remove(void)
1303 {
1304         while (root_lance_dev) {
1305                 struct net_device *dev = root_lance_dev;
1306                 struct lance_private *lp = netdev_priv(dev);
1307 
1308                 unregister_netdev(dev);
1309                 root_lance_dev = lp->next;
1310                 free_netdev(dev);
1311         }
1312 }
1313 
1314 #ifdef CONFIG_TC
1315 static int dec_lance_tc_probe(struct device *dev);
1316 static int dec_lance_tc_remove(struct device *dev);
1317 
1318 static const struct tc_device_id dec_lance_tc_table[] = {
1319         { "DEC     ", "PMAD-AA " },
1320         { }
1321 };
1322 MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
1323 
1324 static struct tc_driver dec_lance_tc_driver = {
1325         .id_table       = dec_lance_tc_table,
1326         .driver         = {
1327                 .name   = "declance",
1328                 .bus    = &tc_bus_type,
1329                 .probe  = dec_lance_tc_probe,
1330                 .remove = dec_lance_tc_remove,
1331         },
1332 };
1333 
1334 static int dec_lance_tc_probe(struct device *dev)
1335 {
1336         int status = dec_lance_probe(dev, PMAD_LANCE);
1337         if (!status)
1338                 get_device(dev);
1339         return status;
1340 }
1341 
1342 static void dec_lance_remove(struct device *bdev)
1343 {
1344         struct net_device *dev = dev_get_drvdata(bdev);
1345         resource_size_t start, len;
1346 
1347         unregister_netdev(dev);
1348         start = to_tc_dev(bdev)->resource.start;
1349         len = to_tc_dev(bdev)->resource.end - start + 1;
1350         release_mem_region(start, len);
1351         free_netdev(dev);
1352 }
1353 
1354 static int dec_lance_tc_remove(struct device *dev)
1355 {
1356         put_device(dev);
1357         dec_lance_remove(dev);
1358         return 0;
1359 }
1360 #endif
1361 
1362 static int __init dec_lance_init(void)
1363 {
1364         int status;
1365 
1366         status = tc_register_driver(&dec_lance_tc_driver);
1367         if (!status)
1368                 dec_lance_platform_probe();
1369         return status;
1370 }
1371 
1372 static void __exit dec_lance_exit(void)
1373 {
1374         dec_lance_platform_remove();
1375         tc_unregister_driver(&dec_lance_tc_driver);
1376 }
1377 
1378 
1379 module_init(dec_lance_init);
1380 module_exit(dec_lance_exit);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/amd/declance.c

DEFINITIONS
