drivers/net/ethernet/amd/sunlance.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
load_csrs
lance_init_ring_dvma
lance_init_ring_pio
init_restart_ledma
init_restart_lance
lance_rx_dvma
lance_tx_dvma
lance_piocopy_to_skb
lance_rx_pio
lance_tx_pio
lance_interrupt
build_fake_packet
lance_open
lance_close
lance_reset
lance_piocopy_from_skb
lance_piozero
lance_tx_timeout
lance_start_xmit
lance_load_multicast
lance_set_multicast
lance_set_multicast_retry
lance_free_hwresources
sparc_lance_get_drvinfo
sparc_lance_probe_one
sunlance_sbus_probe
sunlance_sbus_remove
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
   3  * lance.c: Linux/Sparc/Lance driver
   4  *
   5  *      Written 1995, 1996 by Miguel de Icaza
   6  * Sources:
   7  *      The Linux  depca driver
   8  *      The Linux  lance driver.
   9  *      The Linux  skeleton driver.
  10  *      The NetBSD Sparc/Lance driver.
  11  *      Theo de Raadt (deraadt@openbsd.org)
  12  *      NCR92C990 Lan Controller manual
  13  *
  14  * 1.4:
  15  *      Added support to run with a ledma on the Sun4m
  16  *
  17  * 1.5:
  18  *      Added multiple card detection.
  19  *
  20  *       4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
  21  *                (ecd@skynet.be)
  22  *
  23  *       5/15/96: auto carrier detection on sun4m by Eddie C. Dost
  24  *                (ecd@skynet.be)
  25  *
  26  *       5/17/96: lebuffer on scsi/ether cards now work David S. Miller
  27  *                (davem@caip.rutgers.edu)
  28  *
  29  *       5/29/96: override option 'tpe-link-test?', if it is 'false', as
  30  *                this disables auto carrier detection on sun4m. Eddie C. Dost
  31  *                (ecd@skynet.be)
  32  *
  33  * 1.7:
  34  *       6/26/96: Bug fix for multiple ledmas, miguel.
  35  *
  36  * 1.8:
  37  *                Stole multicast code from depca.c, fixed lance_tx.
  38  *
  39  * 1.9:
  40  *       8/21/96: Fixed the multicast code (Pedro Roque)
  41  *
  42  *       8/28/96: Send fake packet in lance_open() if auto_select is true,
  43  *                so we can detect the carrier loss condition in time.
  44  *                Eddie C. Dost (ecd@skynet.be)
  45  *
  46  *       9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
  47  *                MNA trap during chksum_partial_copy(). (ecd@skynet.be)
  48  *
  49  *      11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
  50  *
  51  *      12/22/96: Don't loop forever in lance_rx() on incomplete packets.
  52  *                This was the sun4c killer. Shit, stupid bug.
  53  *                (ecd@skynet.be)
  54  *
  55  * 1.10:
  56  *       1/26/97: Modularize driver. (ecd@skynet.be)
  57  *
  58  * 1.11:
  59  *      12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
  60  *
  61  * 1.12:
  62  *       11/3/99: Fixed SMP race in lance_start_xmit found by davem.
  63  *                Anton Blanchard (anton@progsoc.uts.edu.au)
  64  * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
  65  *                David S. Miller (davem@redhat.com)
  66  * 2.01:
  67  *      11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
  68  *
  69  */
  70 
  71 #undef DEBUG_DRIVER
  72 
  73 static char lancestr[] = "LANCE";
  74 
  75 #include <linux/module.h>
  76 #include <linux/kernel.h>
  77 #include <linux/types.h>
  78 #include <linux/fcntl.h>
  79 #include <linux/interrupt.h>
  80 #include <linux/ioport.h>
  81 #include <linux/in.h>
  82 #include <linux/string.h>
  83 #include <linux/delay.h>
  84 #include <linux/crc32.h>
  85 #include <linux/errno.h>
  86 #include <linux/socket.h> /* Used for the temporal inet entries and routing */
  87 #include <linux/route.h>
  88 #include <linux/netdevice.h>
  89 #include <linux/etherdevice.h>
  90 #include <linux/skbuff.h>
  91 #include <linux/ethtool.h>
  92 #include <linux/bitops.h>
  93 #include <linux/dma-mapping.h>
  94 #include <linux/of.h>
  95 #include <linux/of_device.h>
  96 #include <linux/gfp.h>
  97 
  98 #include <asm/io.h>
  99 #include <asm/dma.h>
 100 #include <asm/pgtable.h>
 101 #include <asm/byteorder.h>      /* Used by the checksum routines */
 102 #include <asm/idprom.h>
 103 #include <asm/prom.h>
 104 #include <asm/auxio.h>          /* For tpe-link-test? setting */
 105 #include <asm/irq.h>
 106 
 107 #define DRV_NAME        "sunlance"
 108 #define DRV_VERSION     "2.02"
 109 #define DRV_RELDATE     "8/24/03"
 110 #define DRV_AUTHOR      "Miguel de Icaza (miguel@nuclecu.unam.mx)"
 111 
 112 static char version[] =
 113         DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
 114 
 115 MODULE_VERSION(DRV_VERSION);
 116 MODULE_AUTHOR(DRV_AUTHOR);
 117 MODULE_DESCRIPTION("Sun Lance ethernet driver");
 118 MODULE_LICENSE("GPL");
 119 
 120 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
 121 #ifndef LANCE_LOG_TX_BUFFERS
 122 #define LANCE_LOG_TX_BUFFERS 4
 123 #define LANCE_LOG_RX_BUFFERS 4
 124 #endif
 125 
 126 #define LE_CSR0 0
 127 #define LE_CSR1 1
 128 #define LE_CSR2 2
 129 #define LE_CSR3 3
 130 
 131 #define LE_MO_PROM      0x8000  /* Enable promiscuous mode */
 132 
 133 #define LE_C0_ERR       0x8000  /* Error: set if BAB, SQE, MISS or ME is set */
 134 #define LE_C0_BABL      0x4000  /* BAB:  Babble: tx timeout. */
 135 #define LE_C0_CERR      0x2000  /* SQE:  Signal quality error */
 136 #define LE_C0_MISS      0x1000  /* MISS: Missed a packet */
 137 #define LE_C0_MERR      0x0800  /* ME:   Memory error */
 138 #define LE_C0_RINT      0x0400  /* Received interrupt */
 139 #define LE_C0_TINT      0x0200  /* Transmitter Interrupt */
 140 #define LE_C0_IDON      0x0100  /* IFIN: Init finished. */
 141 #define LE_C0_INTR      0x0080  /* Interrupt or error */
 142 #define LE_C0_INEA      0x0040  /* Interrupt enable */
 143 #define LE_C0_RXON      0x0020  /* Receiver on */
 144 #define LE_C0_TXON      0x0010  /* Transmitter on */
 145 #define LE_C0_TDMD      0x0008  /* Transmitter demand */
 146 #define LE_C0_STOP      0x0004  /* Stop the card */
 147 #define LE_C0_STRT      0x0002  /* Start the card */
 148 #define LE_C0_INIT      0x0001  /* Init the card */
 149 
 150 #define LE_C3_BSWP      0x4     /* SWAP */
 151 #define LE_C3_ACON      0x2     /* ALE Control */
 152 #define LE_C3_BCON      0x1     /* Byte control */
 153 
 154 /* Receive message descriptor 1 */
 155 #define LE_R1_OWN       0x80    /* Who owns the entry */
 156 #define LE_R1_ERR       0x40    /* Error: if FRA, OFL, CRC or BUF is set */
 157 #define LE_R1_FRA       0x20    /* FRA: Frame error */
 158 #define LE_R1_OFL       0x10    /* OFL: Frame overflow */
 159 #define LE_R1_CRC       0x08    /* CRC error */
 160 #define LE_R1_BUF       0x04    /* BUF: Buffer error */
 161 #define LE_R1_SOP       0x02    /* Start of packet */
 162 #define LE_R1_EOP       0x01    /* End of packet */
 163 #define LE_R1_POK       0x03    /* Packet is complete: SOP + EOP */
 164 
 165 #define LE_T1_OWN       0x80    /* Lance owns the packet */
 166 #define LE_T1_ERR       0x40    /* Error summary */
 167 #define LE_T1_EMORE     0x10    /* Error: more than one retry needed */
 168 #define LE_T1_EONE      0x08    /* Error: one retry needed */
 169 #define LE_T1_EDEF      0x04    /* Error: deferred */
 170 #define LE_T1_SOP       0x02    /* Start of packet */
 171 #define LE_T1_EOP       0x01    /* End of packet */
 172 #define LE_T1_POK       0x03    /* Packet is complete: SOP + EOP */
 173 
 174 #define LE_T3_BUF       0x8000  /* Buffer error */
 175 #define LE_T3_UFL       0x4000  /* Error underflow */
 176 #define LE_T3_LCOL      0x1000  /* Error late collision */
 177 #define LE_T3_CLOS      0x0800  /* Error carrier loss */
 178 #define LE_T3_RTY       0x0400  /* Error retry */
 179 #define LE_T3_TDR       0x03ff  /* Time Domain Reflectometry counter */
 180 
 181 #define TX_RING_SIZE                    (1 << (LANCE_LOG_TX_BUFFERS))
 182 #define TX_RING_MOD_MASK                (TX_RING_SIZE - 1)
 183 #define TX_RING_LEN_BITS                ((LANCE_LOG_TX_BUFFERS) << 29)
 184 #define TX_NEXT(__x)                    (((__x)+1) & TX_RING_MOD_MASK)
 185 
 186 #define RX_RING_SIZE                    (1 << (LANCE_LOG_RX_BUFFERS))
 187 #define RX_RING_MOD_MASK                (RX_RING_SIZE - 1)
 188 #define RX_RING_LEN_BITS                ((LANCE_LOG_RX_BUFFERS) << 29)
 189 #define RX_NEXT(__x)                    (((__x)+1) & RX_RING_MOD_MASK)
 190 
 191 #define PKT_BUF_SZ              1544
 192 #define RX_BUFF_SIZE            PKT_BUF_SZ
 193 #define TX_BUFF_SIZE            PKT_BUF_SZ
 194 
 195 struct lance_rx_desc {
 196         u16     rmd0;           /* low address of packet */
 197         u8      rmd1_bits;      /* descriptor bits */
 198         u8      rmd1_hadr;      /* high address of packet */
 199         s16     length;         /* This length is 2s complement (negative)!
 200                                  * Buffer length
 201                                  */
 202         u16     mblength;       /* This is the actual number of bytes received */
 203 };
 204 
 205 struct lance_tx_desc {
 206         u16     tmd0;           /* low address of packet */
 207         u8      tmd1_bits;      /* descriptor bits */
 208         u8      tmd1_hadr;      /* high address of packet */
 209         s16     length;         /* Length is 2s complement (negative)! */
 210         u16     misc;
 211 };
 212 
 213 /* The LANCE initialization block, described in databook. */
 214 /* On the Sparc, this block should be on a DMA region     */
 215 struct lance_init_block {
 216         u16     mode;           /* Pre-set mode (reg. 15) */
 217         u8      phys_addr[6];   /* Physical ethernet address */
 218         u32     filter[2];      /* Multicast filter. */
 219 
 220         /* Receive and transmit ring base, along with extra bits. */
 221         u16     rx_ptr;         /* receive descriptor addr */
 222         u16     rx_len;         /* receive len and high addr */
 223         u16     tx_ptr;         /* transmit descriptor addr */
 224         u16     tx_len;         /* transmit len and high addr */
 225 
 226         /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
 227         struct lance_rx_desc brx_ring[RX_RING_SIZE];
 228         struct lance_tx_desc btx_ring[TX_RING_SIZE];
 229 
 230         u8      tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
 231         u8      pad[2];         /* align rx_buf for copy_and_sum(). */
 232         u8      rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
 233 };
 234 
 235 #define libdesc_offset(rt, elem) \
 236 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
 237 
 238 #define libbuff_offset(rt, elem) \
 239 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
 240 
 241 struct lance_private {
 242         void __iomem    *lregs;         /* Lance RAP/RDP regs.          */
 243         void __iomem    *dregs;         /* DMA controller regs.         */
 244         struct lance_init_block __iomem *init_block_iomem;
 245         struct lance_init_block *init_block_mem;
 246 
 247         spinlock_t      lock;
 248 
 249         int             rx_new, tx_new;
 250         int             rx_old, tx_old;
 251 
 252         struct platform_device *ledma;  /* If set this points to ledma  */
 253         char            tpe;            /* cable-selection is TPE       */
 254         char            auto_select;    /* cable-selection by carrier   */
 255         char            burst_sizes;    /* ledma SBus burst sizes       */
 256         char            pio_buffer;     /* init block in PIO space?     */
 257 
 258         unsigned short  busmaster_regval;
 259 
 260         void (*init_ring)(struct net_device *);
 261         void (*rx)(struct net_device *);
 262         void (*tx)(struct net_device *);
 263 
 264         char                   *name;
 265         dma_addr_t              init_block_dvma;
 266         struct net_device      *dev;              /* Backpointer        */
 267         struct platform_device       *op;
 268         struct platform_device       *lebuffer;
 269         struct timer_list       multicast_timer;
 270 };
 271 
 272 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
 273                         lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
 274                         lp->tx_old - lp->tx_new-1)
 275 
 276 /* Lance registers. */
 277 #define RDP             0x00UL          /* register data port           */
 278 #define RAP             0x02UL          /* register address port        */
 279 #define LANCE_REG_SIZE  0x04UL
 280 
 281 #define STOP_LANCE(__lp) \
 282 do {    void __iomem *__base = (__lp)->lregs; \
 283         sbus_writew(LE_CSR0,    __base + RAP); \
 284         sbus_writew(LE_C0_STOP, __base + RDP); \
 285 } while (0)
 286 
 287 int sparc_lance_debug = 2;
 288 
 289 /* The Lance uses 24 bit addresses */
 290 /* On the Sun4c the DVMA will provide the remaining bytes for us */
 291 /* On the Sun4m we have to instruct the ledma to provide them    */
 292 /* Even worse, on scsi/ether SBUS cards, the init block and the
 293  * transmit/receive buffers are addresses as offsets from absolute
 294  * zero on the lebuffer PIO area. -DaveM
 295  */
 296 
 297 #define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
 298 
 299 /* Load the CSR registers */
 300 static void load_csrs(struct lance_private *lp)
 301 {
 302         u32 leptr;
 303 
 304         if (lp->pio_buffer)
 305                 leptr = 0;
 306         else
 307                 leptr = LANCE_ADDR(lp->init_block_dvma);
 308 
 309         sbus_writew(LE_CSR1,              lp->lregs + RAP);
 310         sbus_writew(leptr & 0xffff,       lp->lregs + RDP);
 311         sbus_writew(LE_CSR2,              lp->lregs + RAP);
 312         sbus_writew(leptr >> 16,          lp->lregs + RDP);
 313         sbus_writew(LE_CSR3,              lp->lregs + RAP);
 314         sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
 315 
 316         /* Point back to csr0 */
 317         sbus_writew(LE_CSR0, lp->lregs + RAP);
 318 }
 319 
 320 /* Setup the Lance Rx and Tx rings */
 321 static void lance_init_ring_dvma(struct net_device *dev)
 322 {
 323         struct lance_private *lp = netdev_priv(dev);
 324         struct lance_init_block *ib = lp->init_block_mem;
 325         dma_addr_t aib = lp->init_block_dvma;
 326         __u32 leptr;
 327         int i;
 328 
 329         /* Lock out other processes while setting up hardware */
 330         netif_stop_queue(dev);
 331         lp->rx_new = lp->tx_new = 0;
 332         lp->rx_old = lp->tx_old = 0;
 333 
 334         /* Copy the ethernet address to the lance init block
 335          * Note that on the sparc you need to swap the ethernet address.
 336          */
 337         ib->phys_addr [0] = dev->dev_addr [1];
 338         ib->phys_addr [1] = dev->dev_addr [0];
 339         ib->phys_addr [2] = dev->dev_addr [3];
 340         ib->phys_addr [3] = dev->dev_addr [2];
 341         ib->phys_addr [4] = dev->dev_addr [5];
 342         ib->phys_addr [5] = dev->dev_addr [4];
 343 
 344         /* Setup the Tx ring entries */
 345         for (i = 0; i < TX_RING_SIZE; i++) {
 346                 leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
 347                 ib->btx_ring [i].tmd0      = leptr;
 348                 ib->btx_ring [i].tmd1_hadr = leptr >> 16;
 349                 ib->btx_ring [i].tmd1_bits = 0;
 350                 ib->btx_ring [i].length    = 0xf000; /* The ones required by tmd2 */
 351                 ib->btx_ring [i].misc      = 0;
 352         }
 353 
 354         /* Setup the Rx ring entries */
 355         for (i = 0; i < RX_RING_SIZE; i++) {
 356                 leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
 357 
 358                 ib->brx_ring [i].rmd0      = leptr;
 359                 ib->brx_ring [i].rmd1_hadr = leptr >> 16;
 360                 ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
 361                 ib->brx_ring [i].length    = -RX_BUFF_SIZE | 0xf000;
 362                 ib->brx_ring [i].mblength  = 0;
 363         }
 364 
 365         /* Setup the initialization block */
 366 
 367         /* Setup rx descriptor pointer */
 368         leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
 369         ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
 370         ib->rx_ptr = leptr;
 371 
 372         /* Setup tx descriptor pointer */
 373         leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
 374         ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
 375         ib->tx_ptr = leptr;
 376 }
 377 
 378 static void lance_init_ring_pio(struct net_device *dev)
 379 {
 380         struct lance_private *lp = netdev_priv(dev);
 381         struct lance_init_block __iomem *ib = lp->init_block_iomem;
 382         u32 leptr;
 383         int i;
 384 
 385         /* Lock out other processes while setting up hardware */
 386         netif_stop_queue(dev);
 387         lp->rx_new = lp->tx_new = 0;
 388         lp->rx_old = lp->tx_old = 0;
 389 
 390         /* Copy the ethernet address to the lance init block
 391          * Note that on the sparc you need to swap the ethernet address.
 392          */
 393         sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
 394         sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
 395         sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
 396         sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
 397         sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
 398         sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
 399 
 400         /* Setup the Tx ring entries */
 401         for (i = 0; i < TX_RING_SIZE; i++) {
 402                 leptr = libbuff_offset(tx_buf, i);
 403                 sbus_writew(leptr,      &ib->btx_ring [i].tmd0);
 404                 sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
 405                 sbus_writeb(0,          &ib->btx_ring [i].tmd1_bits);
 406 
 407                 /* The ones required by tmd2 */
 408                 sbus_writew(0xf000,     &ib->btx_ring [i].length);
 409                 sbus_writew(0,          &ib->btx_ring [i].misc);
 410         }
 411 
 412         /* Setup the Rx ring entries */
 413         for (i = 0; i < RX_RING_SIZE; i++) {
 414                 leptr = libbuff_offset(rx_buf, i);
 415 
 416                 sbus_writew(leptr,      &ib->brx_ring [i].rmd0);
 417                 sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
 418                 sbus_writeb(LE_R1_OWN,  &ib->brx_ring [i].rmd1_bits);
 419                 sbus_writew(-RX_BUFF_SIZE|0xf000,
 420                             &ib->brx_ring [i].length);
 421                 sbus_writew(0,          &ib->brx_ring [i].mblength);
 422         }
 423 
 424         /* Setup the initialization block */
 425 
 426         /* Setup rx descriptor pointer */
 427         leptr = libdesc_offset(brx_ring, 0);
 428         sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
 429                     &ib->rx_len);
 430         sbus_writew(leptr, &ib->rx_ptr);
 431 
 432         /* Setup tx descriptor pointer */
 433         leptr = libdesc_offset(btx_ring, 0);
 434         sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
 435                     &ib->tx_len);
 436         sbus_writew(leptr, &ib->tx_ptr);
 437 }
 438 
 439 static void init_restart_ledma(struct lance_private *lp)
 440 {
 441         u32 csr = sbus_readl(lp->dregs + DMA_CSR);
 442 
 443         if (!(csr & DMA_HNDL_ERROR)) {
 444                 /* E-Cache draining */
 445                 while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
 446                         barrier();
 447         }
 448 
 449         csr = sbus_readl(lp->dregs + DMA_CSR);
 450         csr &= ~DMA_E_BURSTS;
 451         if (lp->burst_sizes & DMA_BURST32)
 452                 csr |= DMA_E_BURST32;
 453         else
 454                 csr |= DMA_E_BURST16;
 455 
 456         csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
 457 
 458         if (lp->tpe)
 459                 csr |= DMA_EN_ENETAUI;
 460         else
 461                 csr &= ~DMA_EN_ENETAUI;
 462         udelay(20);
 463         sbus_writel(csr, lp->dregs + DMA_CSR);
 464         udelay(200);
 465 }
 466 
 467 static int init_restart_lance(struct lance_private *lp)
 468 {
 469         u16 regval = 0;
 470         int i;
 471 
 472         if (lp->dregs)
 473                 init_restart_ledma(lp);
 474 
 475         sbus_writew(LE_CSR0,    lp->lregs + RAP);
 476         sbus_writew(LE_C0_INIT, lp->lregs + RDP);
 477 
 478         /* Wait for the lance to complete initialization */
 479         for (i = 0; i < 100; i++) {
 480                 regval = sbus_readw(lp->lregs + RDP);
 481 
 482                 if (regval & (LE_C0_ERR | LE_C0_IDON))
 483                         break;
 484                 barrier();
 485         }
 486         if (i == 100 || (regval & LE_C0_ERR)) {
 487                 printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
 488                        i, regval);
 489                 if (lp->dregs)
 490                         printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
 491                 return -1;
 492         }
 493 
 494         /* Clear IDON by writing a "1", enable interrupts and start lance */
 495         sbus_writew(LE_C0_IDON,                 lp->lregs + RDP);
 496         sbus_writew(LE_C0_INEA | LE_C0_STRT,    lp->lregs + RDP);
 497 
 498         if (lp->dregs) {
 499                 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
 500 
 501                 csr |= DMA_INT_ENAB;
 502                 sbus_writel(csr, lp->dregs + DMA_CSR);
 503         }
 504 
 505         return 0;
 506 }
 507 
 508 static void lance_rx_dvma(struct net_device *dev)
 509 {
 510         struct lance_private *lp = netdev_priv(dev);
 511         struct lance_init_block *ib = lp->init_block_mem;
 512         struct lance_rx_desc *rd;
 513         u8 bits;
 514         int len, entry = lp->rx_new;
 515         struct sk_buff *skb;
 516 
 517         for (rd = &ib->brx_ring [entry];
 518              !((bits = rd->rmd1_bits) & LE_R1_OWN);
 519              rd = &ib->brx_ring [entry]) {
 520 
 521                 /* We got an incomplete frame? */
 522                 if ((bits & LE_R1_POK) != LE_R1_POK) {
 523                         dev->stats.rx_over_errors++;
 524                         dev->stats.rx_errors++;
 525                 } else if (bits & LE_R1_ERR) {
 526                         /* Count only the end frame as a rx error,
 527                          * not the beginning
 528                          */
 529                         if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
 530                         if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
 531                         if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
 532                         if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
 533                         if (bits & LE_R1_EOP) dev->stats.rx_errors++;
 534                 } else {
 535                         len = (rd->mblength & 0xfff) - 4;
 536                         skb = netdev_alloc_skb(dev, len + 2);
 537 
 538                         if (skb == NULL) {
 539                                 dev->stats.rx_dropped++;
 540                                 rd->mblength = 0;
 541                                 rd->rmd1_bits = LE_R1_OWN;
 542                                 lp->rx_new = RX_NEXT(entry);
 543                                 return;
 544                         }
 545 
 546                         dev->stats.rx_bytes += len;
 547 
 548                         skb_reserve(skb, 2);            /* 16 byte align */
 549                         skb_put(skb, len);              /* make room */
 550                         skb_copy_to_linear_data(skb,
 551                                          (unsigned char *)&(ib->rx_buf [entry][0]),
 552                                          len);
 553                         skb->protocol = eth_type_trans(skb, dev);
 554                         netif_rx(skb);
 555                         dev->stats.rx_packets++;
 556                 }
 557 
 558                 /* Return the packet to the pool */
 559                 rd->mblength = 0;
 560                 rd->rmd1_bits = LE_R1_OWN;
 561                 entry = RX_NEXT(entry);
 562         }
 563 
 564         lp->rx_new = entry;
 565 }
 566 
 567 static void lance_tx_dvma(struct net_device *dev)
 568 {
 569         struct lance_private *lp = netdev_priv(dev);
 570         struct lance_init_block *ib = lp->init_block_mem;
 571         int i, j;
 572 
 573         spin_lock(&lp->lock);
 574 
 575         j = lp->tx_old;
 576         for (i = j; i != lp->tx_new; i = j) {
 577                 struct lance_tx_desc *td = &ib->btx_ring [i];
 578                 u8 bits = td->tmd1_bits;
 579 
 580                 /* If we hit a packet not owned by us, stop */
 581                 if (bits & LE_T1_OWN)
 582                         break;
 583 
 584                 if (bits & LE_T1_ERR) {
 585                         u16 status = td->misc;
 586 
 587                         dev->stats.tx_errors++;
 588                         if (status & LE_T3_RTY)  dev->stats.tx_aborted_errors++;
 589                         if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
 590 
 591                         if (status & LE_T3_CLOS) {
 592                                 dev->stats.tx_carrier_errors++;
 593                                 if (lp->auto_select) {
 594                                         lp->tpe = 1 - lp->tpe;
 595                                         printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
 596                                                dev->name, lp->tpe?"TPE":"AUI");
 597                                         STOP_LANCE(lp);
 598                                         lp->init_ring(dev);
 599                                         load_csrs(lp);
 600                                         init_restart_lance(lp);
 601                                         goto out;
 602                                 }
 603                         }
 604 
 605                         /* Buffer errors and underflows turn off the
 606                          * transmitter, restart the adapter.
 607                          */
 608                         if (status & (LE_T3_BUF|LE_T3_UFL)) {
 609                                 dev->stats.tx_fifo_errors++;
 610 
 611                                 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
 612                                        dev->name);
 613                                 STOP_LANCE(lp);
 614                                 lp->init_ring(dev);
 615                                 load_csrs(lp);
 616                                 init_restart_lance(lp);
 617                                 goto out;
 618                         }
 619                 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
 620                         /*
 621                          * So we don't count the packet more than once.
 622                          */
 623                         td->tmd1_bits = bits & ~(LE_T1_POK);
 624 
 625                         /* One collision before packet was sent. */
 626                         if (bits & LE_T1_EONE)
 627                                 dev->stats.collisions++;
 628 
 629                         /* More than one collision, be optimistic. */
 630                         if (bits & LE_T1_EMORE)
 631                                 dev->stats.collisions += 2;
 632 
 633                         dev->stats.tx_packets++;
 634                 }
 635 
 636                 j = TX_NEXT(j);
 637         }
 638         lp->tx_old = j;
 639 out:
 640         if (netif_queue_stopped(dev) &&
 641             TX_BUFFS_AVAIL > 0)
 642                 netif_wake_queue(dev);
 643 
 644         spin_unlock(&lp->lock);
 645 }
 646 
 647 static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
 648 {
 649         u16 *p16 = (u16 *) skb->data;
 650         u32 *p32;
 651         u8 *p8;
 652         void __iomem *pbuf = piobuf;
 653 
 654         /* We know here that both src and dest are on a 16bit boundary. */
 655         *p16++ = sbus_readw(pbuf);
 656         p32 = (u32 *) p16;
 657         pbuf += 2;
 658         len -= 2;
 659 
 660         while (len >= 4) {
 661                 *p32++ = sbus_readl(pbuf);
 662                 pbuf += 4;
 663                 len -= 4;
 664         }
 665         p8 = (u8 *) p32;
 666         if (len >= 2) {
 667                 p16 = (u16 *) p32;
 668                 *p16++ = sbus_readw(pbuf);
 669                 pbuf += 2;
 670                 len -= 2;
 671                 p8 = (u8 *) p16;
 672         }
 673         if (len >= 1)
 674                 *p8 = sbus_readb(pbuf);
 675 }
 676 
 677 static void lance_rx_pio(struct net_device *dev)
 678 {
 679         struct lance_private *lp = netdev_priv(dev);
 680         struct lance_init_block __iomem *ib = lp->init_block_iomem;
 681         struct lance_rx_desc __iomem *rd;
 682         unsigned char bits;
 683         int len, entry;
 684         struct sk_buff *skb;
 685 
 686         entry = lp->rx_new;
 687         for (rd = &ib->brx_ring [entry];
 688              !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
 689              rd = &ib->brx_ring [entry]) {
 690 
 691                 /* We got an incomplete frame? */
 692                 if ((bits & LE_R1_POK) != LE_R1_POK) {
 693                         dev->stats.rx_over_errors++;
 694                         dev->stats.rx_errors++;
 695                 } else if (bits & LE_R1_ERR) {
 696                         /* Count only the end frame as a rx error,
 697                          * not the beginning
 698                          */
 699                         if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
 700                         if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
 701                         if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
 702                         if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
 703                         if (bits & LE_R1_EOP) dev->stats.rx_errors++;
 704                 } else {
 705                         len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
 706                         skb = netdev_alloc_skb(dev, len + 2);
 707 
 708                         if (skb == NULL) {
 709                                 dev->stats.rx_dropped++;
 710                                 sbus_writew(0, &rd->mblength);
 711                                 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
 712                                 lp->rx_new = RX_NEXT(entry);
 713                                 return;
 714                         }
 715 
 716                         dev->stats.rx_bytes += len;
 717 
 718                         skb_reserve (skb, 2);           /* 16 byte align */
 719                         skb_put(skb, len);              /* make room */
 720                         lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
 721                         skb->protocol = eth_type_trans(skb, dev);
 722                         netif_rx(skb);
 723                         dev->stats.rx_packets++;
 724                 }
 725 
 726                 /* Return the packet to the pool */
 727                 sbus_writew(0, &rd->mblength);
 728                 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
 729                 entry = RX_NEXT(entry);
 730         }
 731 
 732         lp->rx_new = entry;
 733 }
 734 
 735 static void lance_tx_pio(struct net_device *dev)
 736 {
 737         struct lance_private *lp = netdev_priv(dev);
 738         struct lance_init_block __iomem *ib = lp->init_block_iomem;
 739         int i, j;
 740 
 741         spin_lock(&lp->lock);
 742 
 743         j = lp->tx_old;
 744         for (i = j; i != lp->tx_new; i = j) {
 745                 struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
 746                 u8 bits = sbus_readb(&td->tmd1_bits);
 747 
 748                 /* If we hit a packet not owned by us, stop */
 749                 if (bits & LE_T1_OWN)
 750                         break;
 751 
 752                 if (bits & LE_T1_ERR) {
 753                         u16 status = sbus_readw(&td->misc);
 754 
 755                         dev->stats.tx_errors++;
 756                         if (status & LE_T3_RTY)  dev->stats.tx_aborted_errors++;
 757                         if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
 758 
 759                         if (status & LE_T3_CLOS) {
 760                                 dev->stats.tx_carrier_errors++;
 761                                 if (lp->auto_select) {
 762                                         lp->tpe = 1 - lp->tpe;
 763                                         printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
 764                                                dev->name, lp->tpe?"TPE":"AUI");
 765                                         STOP_LANCE(lp);
 766                                         lp->init_ring(dev);
 767                                         load_csrs(lp);
 768                                         init_restart_lance(lp);
 769                                         goto out;
 770                                 }
 771                         }
 772 
 773                         /* Buffer errors and underflows turn off the
 774                          * transmitter, restart the adapter.
 775                          */
 776                         if (status & (LE_T3_BUF|LE_T3_UFL)) {
 777                                 dev->stats.tx_fifo_errors++;
 778 
 779                                 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
 780                                        dev->name);
 781                                 STOP_LANCE(lp);
 782                                 lp->init_ring(dev);
 783                                 load_csrs(lp);
 784                                 init_restart_lance(lp);
 785                                 goto out;
 786                         }
 787                 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
 788                         /*
 789                          * So we don't count the packet more than once.
 790                          */
 791                         sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
 792 
 793                         /* One collision before packet was sent. */
 794                         if (bits & LE_T1_EONE)
 795                                 dev->stats.collisions++;
 796 
 797                         /* More than one collision, be optimistic. */
 798                         if (bits & LE_T1_EMORE)
 799                                 dev->stats.collisions += 2;
 800 
 801                         dev->stats.tx_packets++;
 802                 }
 803 
 804                 j = TX_NEXT(j);
 805         }
 806         lp->tx_old = j;
 807 
 808         if (netif_queue_stopped(dev) &&
 809             TX_BUFFS_AVAIL > 0)
 810                 netif_wake_queue(dev);
 811 out:
 812         spin_unlock(&lp->lock);
 813 }
 814 
 815 static irqreturn_t lance_interrupt(int irq, void *dev_id)
 816 {
 817         struct net_device *dev = dev_id;
 818         struct lance_private *lp = netdev_priv(dev);
 819         int csr0;
 820 
 821         sbus_writew(LE_CSR0, lp->lregs + RAP);
 822         csr0 = sbus_readw(lp->lregs + RDP);
 823 
 824         /* Acknowledge all the interrupt sources ASAP */
 825         sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
 826                     lp->lregs + RDP);
 827 
 828         if ((csr0 & LE_C0_ERR) != 0) {
 829                 /* Clear the error condition */
 830                 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
 831                              LE_C0_CERR | LE_C0_MERR),
 832                             lp->lregs + RDP);
 833         }
 834 
 835         if (csr0 & LE_C0_RINT)
 836                 lp->rx(dev);
 837 
 838         if (csr0 & LE_C0_TINT)
 839                 lp->tx(dev);
 840 
 841         if (csr0 & LE_C0_BABL)
 842                 dev->stats.tx_errors++;
 843 
 844         if (csr0 & LE_C0_MISS)
 845                 dev->stats.rx_errors++;
 846 
 847         if (csr0 & LE_C0_MERR) {
 848                 if (lp->dregs) {
 849                         u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
 850 
 851                         printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
 852                                dev->name, csr0, addr & 0xffffff);
 853                 } else {
 854                         printk(KERN_ERR "%s: Memory error, status %04x\n",
 855                                dev->name, csr0);
 856                 }
 857 
 858                 sbus_writew(LE_C0_STOP, lp->lregs + RDP);
 859 
 860                 if (lp->dregs) {
 861                         u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
 862 
 863                         dma_csr |= DMA_FIFO_INV;
 864                         sbus_writel(dma_csr, lp->dregs + DMA_CSR);
 865                 }
 866 
 867                 lp->init_ring(dev);
 868                 load_csrs(lp);
 869                 init_restart_lance(lp);
 870                 netif_wake_queue(dev);
 871         }
 872 
 873         sbus_writew(LE_C0_INEA, lp->lregs + RDP);
 874 
 875         return IRQ_HANDLED;
 876 }
 877 
 878 /* Build a fake network packet and send it to ourselves. */
 879 static void build_fake_packet(struct lance_private *lp)
 880 {
 881         struct net_device *dev = lp->dev;
 882         int i, entry;
 883 
 884         entry = lp->tx_new & TX_RING_MOD_MASK;
 885         if (lp->pio_buffer) {
 886                 struct lance_init_block __iomem *ib = lp->init_block_iomem;
 887                 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
 888                 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
 889                 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
 890                         sbus_writew(0, &packet[i]);
 891                 for (i = 0; i < 6; i++) {
 892                         sbus_writeb(dev->dev_addr[i], &eth->h_dest[i]);
 893                         sbus_writeb(dev->dev_addr[i], &eth->h_source[i]);
 894                 }
 895                 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
 896                 sbus_writew(0, &ib->btx_ring[entry].misc);
 897                 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
 898         } else {
 899                 struct lance_init_block *ib = lp->init_block_mem;
 900                 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
 901                 struct ethhdr *eth = (struct ethhdr *) packet;
 902                 memset(packet, 0, ETH_ZLEN);
 903                 for (i = 0; i < 6; i++) {
 904                         eth->h_dest[i] = dev->dev_addr[i];
 905                         eth->h_source[i] = dev->dev_addr[i];
 906                 }
 907                 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
 908                 ib->btx_ring[entry].misc = 0;
 909                 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
 910         }
 911         lp->tx_new = TX_NEXT(entry);
 912 }
 913 
 914 static int lance_open(struct net_device *dev)
 915 {
 916         struct lance_private *lp = netdev_priv(dev);
 917         int status = 0;
 918 
 919         STOP_LANCE(lp);
 920 
 921         if (request_irq(dev->irq, lance_interrupt, IRQF_SHARED,
 922                         lancestr, (void *) dev)) {
 923                 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
 924                 return -EAGAIN;
 925         }
 926 
 927         /* On the 4m, setup the ledma to provide the upper bits for buffers */
 928         if (lp->dregs) {
 929                 u32 regval = lp->init_block_dvma & 0xff000000;
 930 
 931                 sbus_writel(regval, lp->dregs + DMA_TEST);
 932         }
 933 
 934         /* Set mode and clear multicast filter only at device open,
 935          * so that lance_init_ring() called at any error will not
 936          * forget multicast filters.
 937          *
 938          * BTW it is common bug in all lance drivers! --ANK
 939          */
 940         if (lp->pio_buffer) {
 941                 struct lance_init_block __iomem *ib = lp->init_block_iomem;
 942                 sbus_writew(0, &ib->mode);
 943                 sbus_writel(0, &ib->filter[0]);
 944                 sbus_writel(0, &ib->filter[1]);
 945         } else {
 946                 struct lance_init_block *ib = lp->init_block_mem;
 947                 ib->mode = 0;
 948                 ib->filter [0] = 0;
 949                 ib->filter [1] = 0;
 950         }
 951 
 952         lp->init_ring(dev);
 953         load_csrs(lp);
 954 
 955         netif_start_queue(dev);
 956 
 957         status = init_restart_lance(lp);
 958         if (!status && lp->auto_select) {
 959                 build_fake_packet(lp);
 960                 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
 961         }
 962 
 963         return status;
 964 }
 965 
 966 static int lance_close(struct net_device *dev)
 967 {
 968         struct lance_private *lp = netdev_priv(dev);
 969 
 970         netif_stop_queue(dev);
 971         del_timer_sync(&lp->multicast_timer);
 972 
 973         STOP_LANCE(lp);
 974 
 975         free_irq(dev->irq, (void *) dev);
 976         return 0;
 977 }
 978 
 979 static int lance_reset(struct net_device *dev)
 980 {
 981         struct lance_private *lp = netdev_priv(dev);
 982         int status;
 983 
 984         STOP_LANCE(lp);
 985 
 986         /* On the 4m, reset the dma too */
 987         if (lp->dregs) {
 988                 u32 csr, addr;
 989 
 990                 printk(KERN_ERR "resetting ledma\n");
 991                 csr = sbus_readl(lp->dregs + DMA_CSR);
 992                 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
 993                 udelay(200);
 994                 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
 995 
 996                 addr = lp->init_block_dvma & 0xff000000;
 997                 sbus_writel(addr, lp->dregs + DMA_TEST);
 998         }
 999         lp->init_ring(dev);
1000         load_csrs(lp);
1001         netif_trans_update(dev); /* prevent tx timeout */
1002         status = init_restart_lance(lp);
1003         return status;
1004 }
1005 
1006 static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1007 {
1008         void __iomem *piobuf = dest;
1009         u32 *p32;
1010         u16 *p16;
1011         u8 *p8;
1012 
1013         switch ((unsigned long)src & 0x3) {
1014         case 0:
1015                 p32 = (u32 *) src;
1016                 while (len >= 4) {
1017                         sbus_writel(*p32, piobuf);
1018                         p32++;
1019                         piobuf += 4;
1020                         len -= 4;
1021                 }
1022                 src = (char *) p32;
1023                 break;
1024         case 1:
1025         case 3:
1026                 p8 = (u8 *) src;
1027                 while (len >= 4) {
1028                         u32 val;
1029 
1030                         val  = p8[0] << 24;
1031                         val |= p8[1] << 16;
1032                         val |= p8[2] << 8;
1033                         val |= p8[3];
1034                         sbus_writel(val, piobuf);
1035                         p8 += 4;
1036                         piobuf += 4;
1037                         len -= 4;
1038                 }
1039                 src = (char *) p8;
1040                 break;
1041         case 2:
1042                 p16 = (u16 *) src;
1043                 while (len >= 4) {
1044                         u32 val = p16[0]<<16 | p16[1];
1045                         sbus_writel(val, piobuf);
1046                         p16 += 2;
1047                         piobuf += 4;
1048                         len -= 4;
1049                 }
1050                 src = (char *) p16;
1051                 break;
1052         }
1053         if (len >= 2) {
1054                 u16 val = src[0] << 8 | src[1];
1055                 sbus_writew(val, piobuf);
1056                 src += 2;
1057                 piobuf += 2;
1058                 len -= 2;
1059         }
1060         if (len >= 1)
1061                 sbus_writeb(src[0], piobuf);
1062 }
1063 
1064 static void lance_piozero(void __iomem *dest, int len)
1065 {
1066         void __iomem *piobuf = dest;
1067 
1068         if ((unsigned long)piobuf & 1) {
1069                 sbus_writeb(0, piobuf);
1070                 piobuf += 1;
1071                 len -= 1;
1072                 if (len == 0)
1073                         return;
1074         }
1075         if (len == 1) {
1076                 sbus_writeb(0, piobuf);
1077                 return;
1078         }
1079         if ((unsigned long)piobuf & 2) {
1080                 sbus_writew(0, piobuf);
1081                 piobuf += 2;
1082                 len -= 2;
1083                 if (len == 0)
1084                         return;
1085         }
1086         while (len >= 4) {
1087                 sbus_writel(0, piobuf);
1088                 piobuf += 4;
1089                 len -= 4;
1090         }
1091         if (len >= 2) {
1092                 sbus_writew(0, piobuf);
1093                 piobuf += 2;
1094                 len -= 2;
1095         }
1096         if (len >= 1)
1097                 sbus_writeb(0, piobuf);
1098 }
1099 
1100 static void lance_tx_timeout(struct net_device *dev)
1101 {
1102         struct lance_private *lp = netdev_priv(dev);
1103 
1104         printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1105                dev->name, sbus_readw(lp->lregs + RDP));
1106         lance_reset(dev);
1107         netif_wake_queue(dev);
1108 }
1109 
1110 static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1111 {
1112         struct lance_private *lp = netdev_priv(dev);
1113         int entry, skblen, len;
1114 
1115         skblen = skb->len;
1116 
1117         len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1118 
1119         spin_lock_irq(&lp->lock);
1120 
1121         dev->stats.tx_bytes += len;
1122 
1123         entry = lp->tx_new & TX_RING_MOD_MASK;
1124         if (lp->pio_buffer) {
1125                 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1126                 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1127                 sbus_writew(0, &ib->btx_ring[entry].misc);
1128                 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1129                 if (len != skblen)
1130                         lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1131                 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1132         } else {
1133                 struct lance_init_block *ib = lp->init_block_mem;
1134                 ib->btx_ring [entry].length = (-len) | 0xf000;
1135                 ib->btx_ring [entry].misc = 0;
1136                 skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1137                 if (len != skblen)
1138                         memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1139                 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1140         }
1141 
1142         lp->tx_new = TX_NEXT(entry);
1143 
1144         if (TX_BUFFS_AVAIL <= 0)
1145                 netif_stop_queue(dev);
1146 
1147         /* Kick the lance: transmit now */
1148         sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1149 
1150         /* Read back CSR to invalidate the E-Cache.
1151          * This is needed, because DMA_DSBL_WR_INV is set.
1152          */
1153         if (lp->dregs)
1154                 sbus_readw(lp->lregs + RDP);
1155 
1156         spin_unlock_irq(&lp->lock);
1157 
1158         dev_kfree_skb(skb);
1159 
1160         return NETDEV_TX_OK;
1161 }
1162 
1163 /* taken from the depca driver */
1164 static void lance_load_multicast(struct net_device *dev)
1165 {
1166         struct lance_private *lp = netdev_priv(dev);
1167         struct netdev_hw_addr *ha;
1168         u32 crc;
1169         u32 val;
1170 
1171         /* set all multicast bits */
1172         if (dev->flags & IFF_ALLMULTI)
1173                 val = ~0;
1174         else
1175                 val = 0;
1176 
1177         if (lp->pio_buffer) {
1178                 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1179                 sbus_writel(val, &ib->filter[0]);
1180                 sbus_writel(val, &ib->filter[1]);
1181         } else {
1182                 struct lance_init_block *ib = lp->init_block_mem;
1183                 ib->filter [0] = val;
1184                 ib->filter [1] = val;
1185         }
1186 
1187         if (dev->flags & IFF_ALLMULTI)
1188                 return;
1189 
1190         /* Add addresses */
1191         netdev_for_each_mc_addr(ha, dev) {
1192                 crc = ether_crc_le(6, ha->addr);
1193                 crc = crc >> 26;
1194                 if (lp->pio_buffer) {
1195                         struct lance_init_block __iomem *ib = lp->init_block_iomem;
1196                         u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1197                         u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1198                         tmp |= 1 << (crc & 0xf);
1199                         sbus_writew(tmp, &mcast_table[crc>>4]);
1200                 } else {
1201                         struct lance_init_block *ib = lp->init_block_mem;
1202                         u16 *mcast_table = (u16 *) &ib->filter;
1203                         mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1204                 }
1205         }
1206 }
1207 
1208 static void lance_set_multicast(struct net_device *dev)
1209 {
1210         struct lance_private *lp = netdev_priv(dev);
1211         struct lance_init_block *ib_mem = lp->init_block_mem;
1212         struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1213         u16 mode;
1214 
1215         if (!netif_running(dev))
1216                 return;
1217 
1218         if (lp->tx_old != lp->tx_new) {
1219                 mod_timer(&lp->multicast_timer, jiffies + 4);
1220                 netif_wake_queue(dev);
1221                 return;
1222         }
1223 
1224         netif_stop_queue(dev);
1225 
1226         STOP_LANCE(lp);
1227         lp->init_ring(dev);
1228 
1229         if (lp->pio_buffer)
1230                 mode = sbus_readw(&ib_iomem->mode);
1231         else
1232                 mode = ib_mem->mode;
1233         if (dev->flags & IFF_PROMISC) {
1234                 mode |= LE_MO_PROM;
1235                 if (lp->pio_buffer)
1236                         sbus_writew(mode, &ib_iomem->mode);
1237                 else
1238                         ib_mem->mode = mode;
1239         } else {
1240                 mode &= ~LE_MO_PROM;
1241                 if (lp->pio_buffer)
1242                         sbus_writew(mode, &ib_iomem->mode);
1243                 else
1244                         ib_mem->mode = mode;
1245                 lance_load_multicast(dev);
1246         }
1247         load_csrs(lp);
1248         init_restart_lance(lp);
1249         netif_wake_queue(dev);
1250 }
1251 
1252 static void lance_set_multicast_retry(struct timer_list *t)
1253 {
1254         struct lance_private *lp = from_timer(lp, t, multicast_timer);
1255         struct net_device *dev = lp->dev;
1256 
1257         lance_set_multicast(dev);
1258 }
1259 
1260 static void lance_free_hwresources(struct lance_private *lp)
1261 {
1262         if (lp->lregs)
1263                 of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
1264         if (lp->dregs) {
1265                 struct platform_device *ledma = lp->ledma;
1266 
1267                 of_iounmap(&ledma->resource[0], lp->dregs,
1268                            resource_size(&ledma->resource[0]));
1269         }
1270         if (lp->init_block_iomem) {
1271                 of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
1272                            sizeof(struct lance_init_block));
1273         } else if (lp->init_block_mem) {
1274                 dma_free_coherent(&lp->op->dev,
1275                                   sizeof(struct lance_init_block),
1276                                   lp->init_block_mem,
1277                                   lp->init_block_dvma);
1278         }
1279 }
1280 
1281 /* Ethtool support... */
1282 static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1283 {
1284         strlcpy(info->driver, "sunlance", sizeof(info->driver));
1285         strlcpy(info->version, "2.02", sizeof(info->version));
1286 }
1287 
1288 static const struct ethtool_ops sparc_lance_ethtool_ops = {
1289         .get_drvinfo            = sparc_lance_get_drvinfo,
1290         .get_link               = ethtool_op_get_link,
1291 };
1292 
1293 static const struct net_device_ops sparc_lance_ops = {
1294         .ndo_open               = lance_open,
1295         .ndo_stop               = lance_close,
1296         .ndo_start_xmit         = lance_start_xmit,
1297         .ndo_set_rx_mode        = lance_set_multicast,
1298         .ndo_tx_timeout         = lance_tx_timeout,
1299         .ndo_set_mac_address    = eth_mac_addr,
1300         .ndo_validate_addr      = eth_validate_addr,
1301 };
1302 
1303 static int sparc_lance_probe_one(struct platform_device *op,
1304                                  struct platform_device *ledma,
1305                                  struct platform_device *lebuffer)
1306 {
1307         struct device_node *dp = op->dev.of_node;
1308         static unsigned version_printed;
1309         struct lance_private *lp;
1310         struct net_device *dev;
1311         int    i;
1312 
1313         dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1314         if (!dev)
1315                 return -ENOMEM;
1316 
1317         lp = netdev_priv(dev);
1318 
1319         if (sparc_lance_debug && version_printed++ == 0)
1320                 printk (KERN_INFO "%s", version);
1321 
1322         spin_lock_init(&lp->lock);
1323 
1324         /* Copy the IDPROM ethernet address to the device structure, later we
1325          * will copy the address in the device structure to the lance
1326          * initialization block.
1327          */
1328         for (i = 0; i < 6; i++)
1329                 dev->dev_addr[i] = idprom->id_ethaddr[i];
1330 
1331         /* Get the IO region */
1332         lp->lregs = of_ioremap(&op->resource[0], 0,
1333                                LANCE_REG_SIZE, lancestr);
1334         if (!lp->lregs) {
1335                 printk(KERN_ERR "SunLance: Cannot map registers.\n");
1336                 goto fail;
1337         }
1338 
1339         lp->ledma = ledma;
1340         if (lp->ledma) {
1341                 lp->dregs = of_ioremap(&ledma->resource[0], 0,
1342                                        resource_size(&ledma->resource[0]),
1343                                        "ledma");
1344                 if (!lp->dregs) {
1345                         printk(KERN_ERR "SunLance: Cannot map "
1346                                "ledma registers.\n");
1347                         goto fail;
1348                 }
1349         }
1350 
1351         lp->op = op;
1352         lp->lebuffer = lebuffer;
1353         if (lebuffer) {
1354                 /* sanity check */
1355                 if (lebuffer->resource[0].start & 7) {
1356                         printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1357                         goto fail;
1358                 }
1359                 lp->init_block_iomem =
1360                         of_ioremap(&lebuffer->resource[0], 0,
1361                                    sizeof(struct lance_init_block), "lebuffer");
1362                 if (!lp->init_block_iomem) {
1363                         printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1364                         goto fail;
1365                 }
1366                 lp->init_block_dvma = 0;
1367                 lp->pio_buffer = 1;
1368                 lp->init_ring = lance_init_ring_pio;
1369                 lp->rx = lance_rx_pio;
1370                 lp->tx = lance_tx_pio;
1371         } else {
1372                 lp->init_block_mem =
1373                         dma_alloc_coherent(&op->dev,
1374                                            sizeof(struct lance_init_block),
1375                                            &lp->init_block_dvma, GFP_ATOMIC);
1376                 if (!lp->init_block_mem)
1377                         goto fail;
1378 
1379                 lp->pio_buffer = 0;
1380                 lp->init_ring = lance_init_ring_dvma;
1381                 lp->rx = lance_rx_dvma;
1382                 lp->tx = lance_tx_dvma;
1383         }
1384         lp->busmaster_regval = of_getintprop_default(dp,  "busmaster-regval",
1385                                                      (LE_C3_BSWP |
1386                                                       LE_C3_ACON |
1387                                                       LE_C3_BCON));
1388 
1389         lp->name = lancestr;
1390 
1391         lp->burst_sizes = 0;
1392         if (lp->ledma) {
1393                 struct device_node *ledma_dp = ledma->dev.of_node;
1394                 struct device_node *sbus_dp;
1395                 unsigned int sbmask;
1396                 const char *prop;
1397                 u32 csr;
1398 
1399                 /* Find burst-size property for ledma */
1400                 lp->burst_sizes = of_getintprop_default(ledma_dp,
1401                                                         "burst-sizes", 0);
1402 
1403                 /* ledma may be capable of fast bursts, but sbus may not. */
1404                 sbus_dp = ledma_dp->parent;
1405                 sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
1406                                                DMA_BURSTBITS);
1407                 lp->burst_sizes &= sbmask;
1408 
1409                 /* Get the cable-selection property */
1410                 prop = of_get_property(ledma_dp, "cable-selection", NULL);
1411                 if (!prop || prop[0] == '\0') {
1412                         struct device_node *nd;
1413 
1414                         printk(KERN_INFO "SunLance: using "
1415                                "auto-carrier-detection.\n");
1416 
1417                         nd = of_find_node_by_path("/options");
1418                         if (!nd)
1419                                 goto no_link_test;
1420 
1421                         prop = of_get_property(nd, "tpe-link-test?", NULL);
1422                         if (!prop)
1423                                 goto node_put;
1424 
1425                         if (strcmp(prop, "true")) {
1426                                 printk(KERN_NOTICE "SunLance: warning: overriding option "
1427                                        "'tpe-link-test?'\n");
1428                                 printk(KERN_NOTICE "SunLance: warning: mail any problems "
1429                                        "to ecd@skynet.be\n");
1430                                 auxio_set_lte(AUXIO_LTE_ON);
1431                         }
1432 node_put:
1433                         of_node_put(nd);
1434 no_link_test:
1435                         lp->auto_select = 1;
1436                         lp->tpe = 0;
1437                 } else if (!strcmp(prop, "aui")) {
1438                         lp->auto_select = 0;
1439                         lp->tpe = 0;
1440                 } else {
1441                         lp->auto_select = 0;
1442                         lp->tpe = 1;
1443                 }
1444 
1445                 /* Reset ledma */
1446                 csr = sbus_readl(lp->dregs + DMA_CSR);
1447                 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1448                 udelay(200);
1449                 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1450         } else
1451                 lp->dregs = NULL;
1452 
1453         lp->dev = dev;
1454         SET_NETDEV_DEV(dev, &op->dev);
1455         dev->watchdog_timeo = 5*HZ;
1456         dev->ethtool_ops = &sparc_lance_ethtool_ops;
1457         dev->netdev_ops = &sparc_lance_ops;
1458 
1459         dev->irq = op->archdata.irqs[0];
1460 
1461         /* We cannot sleep if the chip is busy during a
1462          * multicast list update event, because such events
1463          * can occur from interrupts (ex. IPv6).  So we
1464          * use a timer to try again later when necessary. -DaveM
1465          */
1466         timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
1467 
1468         if (register_netdev(dev)) {
1469                 printk(KERN_ERR "SunLance: Cannot register device.\n");
1470                 goto fail;
1471         }
1472 
1473         platform_set_drvdata(op, lp);
1474 
1475         printk(KERN_INFO "%s: LANCE %pM\n",
1476                dev->name, dev->dev_addr);
1477 
1478         return 0;
1479 
1480 fail:
1481         lance_free_hwresources(lp);
1482         free_netdev(dev);
1483         return -ENODEV;
1484 }
1485 
1486 static int sunlance_sbus_probe(struct platform_device *op)
1487 {
1488         struct platform_device *parent = to_platform_device(op->dev.parent);
1489         struct device_node *parent_dp = parent->dev.of_node;
1490         int err;
1491 
1492         if (of_node_name_eq(parent_dp, "ledma")) {
1493                 err = sparc_lance_probe_one(op, parent, NULL);
1494         } else if (of_node_name_eq(parent_dp, "lebuffer")) {
1495                 err = sparc_lance_probe_one(op, NULL, parent);
1496         } else
1497                 err = sparc_lance_probe_one(op, NULL, NULL);
1498 
1499         return err;
1500 }
1501 
1502 static int sunlance_sbus_remove(struct platform_device *op)
1503 {
1504         struct lance_private *lp = platform_get_drvdata(op);
1505         struct net_device *net_dev = lp->dev;
1506 
1507         unregister_netdev(net_dev);
1508 
1509         lance_free_hwresources(lp);
1510 
1511         free_netdev(net_dev);
1512 
1513         return 0;
1514 }
1515 
1516 static const struct of_device_id sunlance_sbus_match[] = {
1517         {
1518                 .name = "le",
1519         },
1520         {},
1521 };
1522 
1523 MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1524 
1525 static struct platform_driver sunlance_sbus_driver = {
1526         .driver = {
1527                 .name = "sunlance",
1528                 .of_match_table = sunlance_sbus_match,
1529         },
1530         .probe          = sunlance_sbus_probe,
1531         .remove         = sunlance_sbus_remove,
1532 };
1533 
1534 module_platform_driver(sunlance_sbus_driver);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/amd/sunlance.c

DEFINITIONS
