linux/drivers/atm/eni.c
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   1/* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
   2 
   3/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
   4 
   5
   6#include <linux/module.h>
   7#include <linux/kernel.h>
   8#include <linux/mm.h>
   9#include <linux/pci.h>
  10#include <linux/errno.h>
  11#include <linux/atm.h>
  12#include <linux/atmdev.h>
  13#include <linux/sonet.h>
  14#include <linux/skbuff.h>
  15#include <linux/time.h>
  16#include <linux/delay.h>
  17#include <linux/uio.h>
  18#include <linux/init.h>
  19#include <linux/atm_eni.h>
  20#include <linux/bitops.h>
  21#include <linux/slab.h>
  22#include <asm/io.h>
  23#include <linux/atomic.h>
  24#include <asm/uaccess.h>
  25#include <asm/string.h>
  26#include <asm/byteorder.h>
  27
  28#include "tonga.h"
  29#include "midway.h"
  30#include "suni.h"
  31#include "eni.h"
  32
  33#if !defined(__i386__) && !defined(__x86_64__)
  34#ifndef ioremap_nocache
  35#define ioremap_nocache(X,Y) ioremap(X,Y)
  36#endif 
  37#endif
  38
  39/*
  40 * TODO:
  41 *
  42 * Show stoppers
  43 *  none
  44 *
  45 * Minor
  46 *  - OAM support
  47 *  - fix bugs listed below
  48 */
  49
  50/*
  51 * KNOWN BUGS:
  52 *
  53 * - may run into JK-JK bug and deadlock
  54 * - should allocate UBR channel first
  55 * - buffer space allocation algorithm is stupid
  56 *   (RX: should be maxSDU+maxdelay*rate
  57 *    TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
  58 * - doesn't support OAM cells
  59 * - eni_put_free may hang if not putting memory fragments that _complete_
  60 *   2^n block (never happens in real life, though)
  61 */
  62
  63
  64#if 0
  65#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
  66#else
  67#define DPRINTK(format,args...)
  68#endif
  69
  70
  71#ifndef CONFIG_ATM_ENI_TUNE_BURST
  72#define CONFIG_ATM_ENI_BURST_TX_8W
  73#define CONFIG_ATM_ENI_BURST_RX_4W
  74#endif
  75
  76
  77#ifndef CONFIG_ATM_ENI_DEBUG
  78
  79
  80#define NULLCHECK(x)
  81
  82#define EVENT(s,a,b)
  83
  84
  85static void event_dump(void)
  86{
  87}
  88
  89
  90#else
  91
  92
  93/* 
  94 * NULL pointer checking
  95 */
  96
  97#define NULLCHECK(x) \
  98        if ((unsigned long) (x) < 0x30) \
  99                printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
 100
 101/*
 102 * Very extensive activity logging. Greatly improves bug detection speed but
 103 * costs a few Mbps if enabled.
 104 */
 105
 106#define EV 64
 107
 108static const char *ev[EV];
 109static unsigned long ev_a[EV],ev_b[EV];
 110static int ec = 0;
 111
 112
 113static void EVENT(const char *s,unsigned long a,unsigned long b)
 114{
 115        ev[ec] = s; 
 116        ev_a[ec] = a;
 117        ev_b[ec] = b;
 118        ec = (ec+1) % EV;
 119}
 120
 121
 122static void event_dump(void)
 123{
 124        int n,i;
 125
 126        for (n = 0; n < EV; n++) {
 127                i = (ec+n) % EV;
 128                printk(KERN_NOTICE);
 129                printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
 130        }
 131}
 132
 133
 134#endif /* CONFIG_ATM_ENI_DEBUG */
 135
 136
 137/*
 138 * NExx   must not be equal at end
 139 * EExx   may be equal at end
 140 * xxPJOK verify validity of pointer jumps
 141 * xxPMOK operating on a circular buffer of "c" words
 142 */
 143
 144#define NEPJOK(a0,a1,b) \
 145    ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
 146#define EEPJOK(a0,a1,b) \
 147    ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
 148#define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
 149#define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
 150
 151
 152static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
 153  backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
 154  putting = 0;
 155
 156static struct atm_dev *eni_boards = NULL;
 157
 158/* Read/write registers on card */
 159#define eni_in(r)       readl(eni_dev->reg+(r)*4)
 160#define eni_out(v,r)    writel((v),eni_dev->reg+(r)*4)
 161
 162
 163/*-------------------------------- utilities --------------------------------*/
 164
 165
 166static void dump_mem(struct eni_dev *eni_dev)
 167{
 168        int i;
 169
 170        for (i = 0; i < eni_dev->free_len; i++)
 171                printk(KERN_DEBUG "  %d: %p %d\n",i,
 172                    eni_dev->free_list[i].start,
 173                    1 << eni_dev->free_list[i].order);
 174}
 175
 176
 177static void dump(struct atm_dev *dev)
 178{
 179        struct eni_dev *eni_dev;
 180
 181        int i;
 182
 183        eni_dev = ENI_DEV(dev);
 184        printk(KERN_NOTICE "Free memory\n");
 185        dump_mem(eni_dev);
 186        printk(KERN_NOTICE "TX buffers\n");
 187        for (i = 0; i < NR_CHAN; i++)
 188                if (eni_dev->tx[i].send)
 189                        printk(KERN_NOTICE "  TX %d @ %p: %ld\n",i,
 190                            eni_dev->tx[i].send,eni_dev->tx[i].words*4);
 191        printk(KERN_NOTICE "RX buffers\n");
 192        for (i = 0; i < 1024; i++)
 193                if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
 194                        printk(KERN_NOTICE "  RX %d @ %p: %ld\n",i,
 195                            ENI_VCC(eni_dev->rx_map[i])->recv,
 196                            ENI_VCC(eni_dev->rx_map[i])->words*4);
 197        printk(KERN_NOTICE "----\n");
 198}
 199
 200
 201static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
 202    unsigned long size)
 203{
 204        struct eni_free *list;
 205        int len,order;
 206
 207        DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
 208        start += eni_dev->base_diff;
 209        list = eni_dev->free_list;
 210        len = eni_dev->free_len;
 211        while (size) {
 212                if (len >= eni_dev->free_list_size) {
 213                        printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
 214                            start,size);
 215                        break;
 216                }
 217                for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
 218                if (MID_MIN_BUF_SIZE > (1 << order)) {
 219                        printk(KERN_CRIT "eni_put_free: order %d too small\n",
 220                            order);
 221                        break;
 222                }
 223                list[len].start = (void __iomem *) start;
 224                list[len].order = order;
 225                len++;
 226                start += 1 << order;
 227                size -= 1 << order;
 228        }
 229        eni_dev->free_len = len;
 230        /*dump_mem(eni_dev);*/
 231}
 232
 233
 234static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
 235{
 236        struct eni_free *list;
 237        void __iomem *start;
 238        int len,i,order,best_order,index;
 239
 240        list = eni_dev->free_list;
 241        len = eni_dev->free_len;
 242        if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
 243        if (*size > MID_MAX_BUF_SIZE) return NULL;
 244        for (order = 0; (1 << order) < *size; order++);
 245        DPRINTK("trying: %ld->%d\n",*size,order);
 246        best_order = 65; /* we don't have more than 2^64 of anything ... */
 247        index = 0; /* silence GCC */
 248        for (i = 0; i < len; i++)
 249                if (list[i].order == order) {
 250                        best_order = order;
 251                        index = i;
 252                        break;
 253                }
 254                else if (best_order > list[i].order && list[i].order > order) {
 255                                best_order = list[i].order;
 256                                index = i;
 257                        }
 258        if (best_order == 65) return NULL;
 259        start = list[index].start-eni_dev->base_diff;
 260        list[index] = list[--len];
 261        eni_dev->free_len = len;
 262        *size = 1 << order;
 263        eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
 264        DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
 265        memset_io(start,0,*size);       /* never leak data */
 266        /*dump_mem(eni_dev);*/
 267        return start;
 268}
 269
 270
 271static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
 272    unsigned long size)
 273{
 274        struct eni_free *list;
 275        int len,i,order;
 276
 277        start += eni_dev->base_diff;
 278        list = eni_dev->free_list;
 279        len = eni_dev->free_len;
 280        for (order = -1; size; order++) size >>= 1;
 281        DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
 282        for (i = 0; i < len; i++)
 283                if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
 284                    list[i].order == order) {
 285                        DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
 286                            list[i].start,start,1 << order,list[i].order,order);
 287                        list[i] = list[--len];
 288                        start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
 289                        order++;
 290                        i = -1;
 291                        continue;
 292                }
 293        if (len >= eni_dev->free_list_size) {
 294                printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
 295                    order);
 296                return;
 297        }
 298        list[len].start = start;
 299        list[len].order = order;
 300        eni_dev->free_len = len+1;
 301        /*dump_mem(eni_dev);*/
 302}
 303
 304
 305/*----------------------------------- RX ------------------------------------*/
 306
 307
 308#define ENI_VCC_NOS ((struct atm_vcc *) 1)
 309
 310
 311static void rx_ident_err(struct atm_vcc *vcc)
 312{
 313        struct atm_dev *dev;
 314        struct eni_dev *eni_dev;
 315        struct eni_vcc *eni_vcc;
 316
 317        dev = vcc->dev;
 318        eni_dev = ENI_DEV(dev);
 319        /* immediately halt adapter */
 320        eni_out(eni_in(MID_MC_S) &
 321            ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
 322        /* dump useful information */
 323        eni_vcc = ENI_VCC(vcc);
 324        printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
 325            "mismatch\n",dev->number);
 326        printk(KERN_ALERT "  VCI %d, rxing %d, words %ld\n",vcc->vci,
 327            eni_vcc->rxing,eni_vcc->words);
 328        printk(KERN_ALERT "  host descr 0x%lx, rx pos 0x%lx, descr value "
 329            "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
 330            (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
 331        printk(KERN_ALERT "  last %p, servicing %d\n",eni_vcc->last,
 332            eni_vcc->servicing);
 333        EVENT("---dump ends here---\n",0,0);
 334        printk(KERN_NOTICE "---recent events---\n");
 335        event_dump();
 336        ENI_DEV(dev)->fast = NULL; /* really stop it */
 337        ENI_DEV(dev)->slow = NULL;
 338        skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
 339}
 340
 341
 342static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
 343    unsigned long skip,unsigned long size,unsigned long eff)
 344{
 345        struct eni_dev *eni_dev;
 346        struct eni_vcc *eni_vcc;
 347        u32 dma_rd,dma_wr;
 348        u32 dma[RX_DMA_BUF*2];
 349        dma_addr_t paddr;
 350        unsigned long here;
 351        int i,j;
 352
 353        eni_dev = ENI_DEV(vcc->dev);
 354        eni_vcc = ENI_VCC(vcc);
 355        paddr = 0; /* GCC, shut up */
 356        if (skb) {
 357                paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
 358                                       DMA_FROM_DEVICE);
 359                if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
 360                        goto dma_map_error;
 361                ENI_PRV_PADDR(skb) = paddr;
 362                if (paddr & 3)
 363                        printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
 364                            "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
 365                            vcc->vci,(unsigned long) paddr);
 366                ENI_PRV_SIZE(skb) = size+skip;
 367                    /* PDU plus descriptor */
 368                ATM_SKB(skb)->vcc = vcc;
 369        }
 370        j = 0;
 371        if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
 372                here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
 373                dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
 374                    << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 375                j++;
 376        }
 377        here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
 378        if (!eff) size += skip;
 379        else {
 380                unsigned long words;
 381
 382                if (!size) {
 383                        DPRINTK("strange things happen ...\n");
 384                        EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
 385                            size,eff);
 386                }
 387                words = eff;
 388                if (paddr & 15) {
 389                        unsigned long init;
 390
 391                        init = 4-((paddr & 15) >> 2);
 392                        if (init > words) init = words;
 393                        dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 394                            (vcc->vci << MID_DMA_VCI_SHIFT);
 395                        dma[j++] = paddr;
 396                        paddr += init << 2;
 397                        words -= init;
 398                }
 399#ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
 400                if (words & ~15) {
 401                        dma[j++] = MID_DT_16W | ((words >> 4) <<
 402                            MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 403                            MID_DMA_VCI_SHIFT);
 404                        dma[j++] = paddr;
 405                        paddr += (words & ~15) << 2;
 406                        words &= 15;
 407                }
 408#endif
 409#ifdef CONFIG_ATM_ENI_BURST_RX_8W  /* works only with *some* PCI chipsets ... */
 410                if (words & ~7) {
 411                        dma[j++] = MID_DT_8W | ((words >> 3) <<
 412                            MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 413                            MID_DMA_VCI_SHIFT);
 414                        dma[j++] = paddr;
 415                        paddr += (words & ~7) << 2;
 416                        words &= 7;
 417                }
 418#endif
 419#ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
 420                if (words & ~3) {
 421                        dma[j++] = MID_DT_4W | ((words >> 2) <<
 422                            MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 423                            MID_DMA_VCI_SHIFT);
 424                        dma[j++] = paddr;
 425                        paddr += (words & ~3) << 2;
 426                        words &= 3;
 427                }
 428#endif
 429#ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
 430                if (words & ~1) {
 431                        dma[j++] = MID_DT_2W | ((words >> 1) <<
 432                            MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 433                            MID_DMA_VCI_SHIFT);
 434                        dma[j++] = paddr;
 435                        paddr += (words & ~1) << 2;
 436                        words &= 1;
 437                }
 438#endif
 439                if (words) {
 440                        dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
 441                            | (vcc->vci << MID_DMA_VCI_SHIFT);
 442                        dma[j++] = paddr;
 443                }
 444        }
 445        if (size != eff) {
 446                dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
 447                    (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 448                j++;
 449        }
 450        if (!j || j > 2*RX_DMA_BUF) {
 451                printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
 452                goto trouble;
 453        }
 454        dma[j-2] |= MID_DMA_END;
 455        j = j >> 1;
 456        dma_wr = eni_in(MID_DMA_WR_RX);
 457        dma_rd = eni_in(MID_DMA_RD_RX);
 458        /*
 459         * Can I move the dma_wr pointer by 2j+1 positions without overwriting
 460         * data that hasn't been read (position of dma_rd) yet ?
 461         */
 462        if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
 463                printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
 464                    vcc->dev->number);
 465                goto trouble;
 466        }
 467        for (i = 0; i < j; i++) {
 468                writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
 469                writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
 470                dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
 471        }
 472        if (skb) {
 473                ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
 474                skb_queue_tail(&eni_dev->rx_queue,skb);
 475                eni_vcc->last = skb;
 476rx_enqueued++;
 477        }
 478        eni_vcc->descr = here;
 479        eni_out(dma_wr,MID_DMA_WR_RX);
 480        return 0;
 481
 482trouble:
 483        if (paddr)
 484                dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
 485                                 DMA_FROM_DEVICE);
 486dma_map_error:
 487        if (skb) dev_kfree_skb_irq(skb);
 488        return -1;
 489}
 490
 491
 492static void discard(struct atm_vcc *vcc,unsigned long size)
 493{
 494        struct eni_vcc *eni_vcc;
 495
 496        eni_vcc = ENI_VCC(vcc);
 497        EVENT("discard (size=%ld)\n",size,0);
 498        while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
 499            /* could do a full fallback, but that might be more expensive */
 500        if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
 501        else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
 502}
 503
 504
 505/*
 506 * TODO: should check whether direct copies (without DMA setup, dequeuing on
 507 * interrupt, etc.) aren't much faster for AAL0
 508 */
 509
 510static int rx_aal0(struct atm_vcc *vcc)
 511{
 512        struct eni_vcc *eni_vcc;
 513        unsigned long descr;
 514        unsigned long length;
 515        struct sk_buff *skb;
 516
 517        DPRINTK(">rx_aal0\n");
 518        eni_vcc = ENI_VCC(vcc);
 519        descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 520        if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 521                rx_ident_err(vcc);
 522                return 1;
 523        }
 524        if (descr & MID_RED_T) {
 525                DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 526                    vcc->dev->number);
 527                length = 0;
 528                atomic_inc(&vcc->stats->rx_err);
 529        }
 530        else {
 531                length = ATM_CELL_SIZE-1; /* no HEC */
 532        }
 533        skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
 534        if (!skb) {
 535                discard(vcc,length >> 2);
 536                return 0;
 537        }
 538        skb_put(skb,length);
 539        skb->tstamp = eni_vcc->timestamp;
 540        DPRINTK("got len %ld\n",length);
 541        if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
 542        eni_vcc->rxing++;
 543        return 0;
 544}
 545
 546
 547static int rx_aal5(struct atm_vcc *vcc)
 548{
 549        struct eni_vcc *eni_vcc;
 550        unsigned long descr;
 551        unsigned long size,eff,length;
 552        struct sk_buff *skb;
 553
 554        EVENT("rx_aal5\n",0,0);
 555        DPRINTK(">rx_aal5\n");
 556        eni_vcc = ENI_VCC(vcc);
 557        descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 558        if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 559                rx_ident_err(vcc);
 560                return 1;
 561        }
 562        if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
 563                if (descr & MID_RED_T) {
 564                        EVENT("empty cell (descr=0x%lx)\n",descr,0);
 565                        DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 566                            vcc->dev->number);
 567                        size = 0;
 568                }
 569                else {
 570                        static unsigned long silence = 0;
 571
 572                        if (time_after(jiffies, silence) || silence == 0) {
 573                                printk(KERN_WARNING DEV_LABEL "(itf %d): "
 574                                    "discarding PDU(s) with CRC error\n",
 575                                    vcc->dev->number);
 576                                silence = (jiffies+2*HZ)|1;
 577                        }
 578                        size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 579                        EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
 580                            size);
 581                }
 582                eff = length = 0;
 583                atomic_inc(&vcc->stats->rx_err);
 584        }
 585        else {
 586                size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 587                DPRINTK("size=%ld\n",size);
 588                length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
 589                    (eni_vcc->words-1)))*4) & 0xffff;
 590                                /* -trailer(2)+header(1) */
 591                if (length && length <= (size << 2)-8 && length <=
 592                  ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
 593                else {                           /* ^ trailer length (8) */
 594                        EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
 595                            length);
 596                        printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
 597                            "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
 598                            vcc->dev->number,vcc->vci,length,size << 2,descr);
 599                        length = eff = 0;
 600                        atomic_inc(&vcc->stats->rx_err);
 601                }
 602        }
 603        skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
 604        if (!skb) {
 605                discard(vcc,size);
 606                return 0;
 607        }
 608        skb_put(skb,length);
 609        DPRINTK("got len %ld\n",length);
 610        if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
 611        eni_vcc->rxing++;
 612        return 0;
 613}
 614
 615
 616static inline int rx_vcc(struct atm_vcc *vcc)
 617{
 618        void __iomem *vci_dsc;
 619        unsigned long tmp;
 620        struct eni_vcc *eni_vcc;
 621
 622        eni_vcc = ENI_VCC(vcc);
 623        vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
 624        EVENT("rx_vcc(1)\n",0,0);
 625        while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
 626            MID_VCI_DESCR_SHIFT)) {
 627                EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
 628                    eni_vcc->descr,tmp);
 629                DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 630                    (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 631                    MID_VCI_DESCR_SHIFT));
 632                if (ENI_VCC(vcc)->rx(vcc)) return 1;
 633        }
 634        /* clear IN_SERVICE flag */
 635        writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
 636        /*
 637         * If new data has arrived between evaluating the while condition and
 638         * clearing IN_SERVICE, we wouldn't be notified until additional data
 639         * follows. So we have to loop again to be sure.
 640         */
 641        EVENT("rx_vcc(3)\n",0,0);
 642        while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
 643            >> MID_VCI_DESCR_SHIFT)) {
 644                EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
 645                    eni_vcc->descr,tmp);
 646                DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 647                    (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 648                    MID_VCI_DESCR_SHIFT));
 649                if (ENI_VCC(vcc)->rx(vcc)) return 1;
 650        }
 651        return 0;
 652}
 653
 654
 655static void poll_rx(struct atm_dev *dev)
 656{
 657        struct eni_dev *eni_dev;
 658        struct atm_vcc *curr;
 659
 660        eni_dev = ENI_DEV(dev);
 661        while ((curr = eni_dev->fast)) {
 662                EVENT("poll_rx.fast\n",0,0);
 663                if (rx_vcc(curr)) return;
 664                eni_dev->fast = ENI_VCC(curr)->next;
 665                ENI_VCC(curr)->next = ENI_VCC_NOS;
 666                barrier();
 667                ENI_VCC(curr)->servicing--;
 668        }
 669        while ((curr = eni_dev->slow)) {
 670                EVENT("poll_rx.slow\n",0,0);
 671                if (rx_vcc(curr)) return;
 672                eni_dev->slow = ENI_VCC(curr)->next;
 673                ENI_VCC(curr)->next = ENI_VCC_NOS;
 674                barrier();
 675                ENI_VCC(curr)->servicing--;
 676        }
 677}
 678
 679
 680static void get_service(struct atm_dev *dev)
 681{
 682        struct eni_dev *eni_dev;
 683        struct atm_vcc *vcc;
 684        unsigned long vci;
 685
 686        DPRINTK(">get_service\n");
 687        eni_dev = ENI_DEV(dev);
 688        while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
 689                vci = readl(eni_dev->service+eni_dev->serv_read*4);
 690                eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
 691                vcc = eni_dev->rx_map[vci & 1023];
 692                if (!vcc) {
 693                        printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
 694                            "found\n",dev->number,vci);
 695                        continue; /* nasty but we try to go on anyway */
 696                        /* @@@ nope, doesn't work */
 697                }
 698                EVENT("getting from service\n",0,0);
 699                if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
 700                        EVENT("double service\n",0,0);
 701                        DPRINTK("Grr, servicing VCC %ld twice\n",vci);
 702                        continue;
 703                }
 704                ENI_VCC(vcc)->timestamp = ktime_get_real();
 705                ENI_VCC(vcc)->next = NULL;
 706                if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
 707                        if (eni_dev->fast)
 708                                ENI_VCC(eni_dev->last_fast)->next = vcc;
 709                        else eni_dev->fast = vcc;
 710                        eni_dev->last_fast = vcc;
 711                }
 712                else {
 713                        if (eni_dev->slow)
 714                                ENI_VCC(eni_dev->last_slow)->next = vcc;
 715                        else eni_dev->slow = vcc;
 716                        eni_dev->last_slow = vcc;
 717                }
 718putting++;
 719                ENI_VCC(vcc)->servicing++;
 720        }
 721}
 722
 723
 724static void dequeue_rx(struct atm_dev *dev)
 725{
 726        struct eni_dev *eni_dev;
 727        struct eni_vcc *eni_vcc;
 728        struct atm_vcc *vcc;
 729        struct sk_buff *skb;
 730        void __iomem *vci_dsc;
 731        int first;
 732
 733        eni_dev = ENI_DEV(dev);
 734        first = 1;
 735        while (1) {
 736                skb = skb_dequeue(&eni_dev->rx_queue);
 737                if (!skb) {
 738                        if (first) {
 739                                DPRINTK(DEV_LABEL "(itf %d): RX but not "
 740                                    "rxing\n",dev->number);
 741                                EVENT("nothing to dequeue\n",0,0);
 742                        }
 743                        break;
 744                }
 745                EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
 746                    ENI_PRV_POS(skb));
 747rx_dequeued++;
 748                vcc = ATM_SKB(skb)->vcc;
 749                eni_vcc = ENI_VCC(vcc);
 750                first = 0;
 751                vci_dsc = eni_dev->vci+vcc->vci*16;
 752                if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
 753                    (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
 754                    eni_vcc->words)) {
 755                        EVENT("requeuing\n",0,0);
 756                        skb_queue_head(&eni_dev->rx_queue,skb);
 757                        break;
 758                }
 759                eni_vcc->rxing--;
 760                eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
 761                dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
 762                                 DMA_TO_DEVICE);
 763                if (!skb->len) dev_kfree_skb_irq(skb);
 764                else {
 765                        EVENT("pushing (len=%ld)\n",skb->len,0);
 766                        if (vcc->qos.aal == ATM_AAL0)
 767                                *(unsigned long *) skb->data =
 768                                    ntohl(*(unsigned long *) skb->data);
 769                        memset(skb->cb,0,sizeof(struct eni_skb_prv));
 770                        vcc->push(vcc,skb);
 771                        pushed++;
 772                }
 773                atomic_inc(&vcc->stats->rx);
 774        }
 775        wake_up(&eni_dev->rx_wait);
 776}
 777
 778
 779static int open_rx_first(struct atm_vcc *vcc)
 780{
 781        struct eni_dev *eni_dev;
 782        struct eni_vcc *eni_vcc;
 783        unsigned long size;
 784
 785        DPRINTK("open_rx_first\n");
 786        eni_dev = ENI_DEV(vcc->dev);
 787        eni_vcc = ENI_VCC(vcc);
 788        eni_vcc->rx = NULL;
 789        if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
 790        size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
 791        if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
 792            MID_MAX_BUF_SIZE)
 793                size = MID_MAX_BUF_SIZE;
 794        eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
 795        DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
 796        eni_vcc->words = size >> 2;
 797        if (!eni_vcc->recv) return -ENOBUFS;
 798        eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
 799        eni_vcc->descr = 0;
 800        eni_vcc->rx_pos = 0;
 801        eni_vcc->rxing = 0;
 802        eni_vcc->servicing = 0;
 803        eni_vcc->next = ENI_VCC_NOS;
 804        return 0;
 805}
 806
 807
 808static int open_rx_second(struct atm_vcc *vcc)
 809{
 810        void __iomem *here;
 811        struct eni_dev *eni_dev;
 812        struct eni_vcc *eni_vcc;
 813        unsigned long size;
 814        int order;
 815
 816        DPRINTK("open_rx_second\n");
 817        eni_dev = ENI_DEV(vcc->dev);
 818        eni_vcc = ENI_VCC(vcc);
 819        if (!eni_vcc->rx) return 0;
 820        /* set up VCI descriptor */
 821        here = eni_dev->vci+vcc->vci*16;
 822        DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
 823        size = eni_vcc->words >> 8;
 824        for (order = -1; size; order++) size >>= 1;
 825        writel(0,here+4); /* descr, read = 0 */
 826        writel(0,here+8); /* write, state, count = 0 */
 827        if (eni_dev->rx_map[vcc->vci])
 828                printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
 829                    "in use\n",vcc->dev->number,vcc->vci);
 830        eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
 831        writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
 832            MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
 833            (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
 834            MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
 835        return 0;
 836}
 837
 838
 839static void close_rx(struct atm_vcc *vcc)
 840{
 841        DECLARE_WAITQUEUE(wait,current);
 842        void __iomem *here;
 843        struct eni_dev *eni_dev;
 844        struct eni_vcc *eni_vcc;
 845
 846        eni_vcc = ENI_VCC(vcc);
 847        if (!eni_vcc->rx) return;
 848        eni_dev = ENI_DEV(vcc->dev);
 849        if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
 850                here = eni_dev->vci+vcc->vci*16;
 851                /* block receiver */
 852                writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
 853                    MID_VCI_MODE_SHIFT),here);
 854                /* wait for receiver to become idle */
 855                udelay(27);
 856                /* discard pending cell */
 857                writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
 858                /* don't accept any new ones */
 859                eni_dev->rx_map[vcc->vci] = NULL;
 860                /* wait for RX queue to drain */
 861                DPRINTK("eni_close: waiting for RX ...\n");
 862                EVENT("RX closing\n",0,0);
 863                add_wait_queue(&eni_dev->rx_wait,&wait);
 864                set_current_state(TASK_UNINTERRUPTIBLE);
 865                barrier();
 866                for (;;) {
 867                        /* transition service->rx: rxing++, servicing-- */
 868                        if (!eni_vcc->servicing) {
 869                                barrier();
 870                                if (!eni_vcc->rxing) break;
 871                        }
 872                        EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
 873                            eni_vcc->servicing);
 874                        printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
 875                            eni_vcc->rxing);
 876                        schedule();
 877                        set_current_state(TASK_UNINTERRUPTIBLE);
 878                }
 879                for (;;) {
 880                        int at_end;
 881                        u32 tmp;
 882
 883                        tasklet_disable(&eni_dev->task);
 884                        tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
 885                        at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
 886                        tasklet_enable(&eni_dev->task);
 887                        if (at_end) break;
 888                        EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
 889                            eni_vcc->rx_pos,tmp);
 890                        printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
 891                            eni_vcc->rx_pos,tmp);
 892                        schedule();
 893                        set_current_state(TASK_UNINTERRUPTIBLE);
 894                }
 895                set_current_state(TASK_RUNNING);
 896                remove_wait_queue(&eni_dev->rx_wait,&wait);
 897        }
 898        eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
 899        eni_vcc->rx = NULL;
 900}
 901
 902
 903static int start_rx(struct atm_dev *dev)
 904{
 905        struct eni_dev *eni_dev;
 906
 907        eni_dev = ENI_DEV(dev);
 908        eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
 909        if (!eni_dev->rx_map) {
 910                printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
 911                    dev->number);
 912                free_page((unsigned long) eni_dev->free_list);
 913                return -ENOMEM;
 914        }
 915        eni_dev->rx_mult = DEFAULT_RX_MULT;
 916        eni_dev->fast = eni_dev->last_fast = NULL;
 917        eni_dev->slow = eni_dev->last_slow = NULL;
 918        init_waitqueue_head(&eni_dev->rx_wait);
 919        skb_queue_head_init(&eni_dev->rx_queue);
 920        eni_dev->serv_read = eni_in(MID_SERV_WRITE);
 921        eni_out(0,MID_DMA_WR_RX);
 922        return 0;
 923}
 924
 925
 926/*----------------------------------- TX ------------------------------------*/
 927
 928
 929enum enq_res { enq_ok,enq_next,enq_jam };
 930
 931
 932static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
 933    u32 size)
 934{
 935        u32 init,words;
 936
 937        DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
 938        EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
 939#if 0 /* don't complain anymore */
 940        if (paddr & 3)
 941                printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
 942        if (size & 3)
 943                printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
 944#endif
 945        if (paddr & 3) {
 946                init = 4-(paddr & 3);
 947                if (init > size || size < 7) init = size;
 948                DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
 949                    (unsigned long) paddr,init,size);
 950                dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
 951                    (chan << MID_DMA_CHAN_SHIFT);
 952                dma[(*j)++] = paddr;
 953                paddr += init;
 954                size -= init;
 955        }
 956        words = size >> 2;
 957        size &= 3;
 958        if (words && (paddr & 31)) {
 959                init = 8-((paddr & 31) >> 2);
 960                if (init > words) init = words;
 961                DPRINTK("put_dma: %lx DMA: %d/%d words\n",
 962                    (unsigned long) paddr,init,words);
 963                dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 964                    (chan << MID_DMA_CHAN_SHIFT);
 965                dma[(*j)++] = paddr;
 966                paddr += init << 2;
 967                words -= init;
 968        }
 969#ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
 970        if (words & ~15) {
 971                DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
 972                    (unsigned long) paddr,words >> 4,words);
 973                dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
 974                    | (chan << MID_DMA_CHAN_SHIFT);
 975                dma[(*j)++] = paddr;
 976                paddr += (words & ~15) << 2;
 977                words &= 15;
 978        }
 979#endif
 980#ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
 981        if (words & ~7) {
 982                DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
 983                    (unsigned long) paddr,words >> 3,words);
 984                dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
 985                    | (chan << MID_DMA_CHAN_SHIFT);
 986                dma[(*j)++] = paddr;
 987                paddr += (words & ~7) << 2;
 988                words &= 7;
 989        }
 990#endif
 991#ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
 992        if (words & ~3) {
 993                DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
 994                    (unsigned long) paddr,words >> 2,words);
 995                dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
 996                    | (chan << MID_DMA_CHAN_SHIFT);
 997                dma[(*j)++] = paddr;
 998                paddr += (words & ~3) << 2;
 999                words &= 3;
1000        }
1001#endif
1002#ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
1003        if (words & ~1) {
1004                DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1005                    (unsigned long) paddr,words >> 1,words);
1006                dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1007                    | (chan << MID_DMA_CHAN_SHIFT);
1008                dma[(*j)++] = paddr;
1009                paddr += (words & ~1) << 2;
1010                words &= 1;
1011        }
1012#endif
1013        if (words) {
1014                DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1015                    words);
1016                dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1017                    (chan << MID_DMA_CHAN_SHIFT);
1018                dma[(*j)++] = paddr;
1019                paddr += words << 2;
1020        }
1021        if (size) {
1022                DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1023                    size);
1024                dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1025                    (chan << MID_DMA_CHAN_SHIFT);
1026                dma[(*j)++] = paddr;
1027        }
1028}
1029
1030
1031static enum enq_res do_tx(struct sk_buff *skb)
1032{
1033        struct atm_vcc *vcc;
1034        struct eni_dev *eni_dev;
1035        struct eni_vcc *eni_vcc;
1036        struct eni_tx *tx;
1037        dma_addr_t paddr;
1038        u32 dma_rd,dma_wr;
1039        u32 size; /* in words */
1040        int aal5,dma_size,i,j;
1041
1042        DPRINTK(">do_tx\n");
1043        NULLCHECK(skb);
1044        EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len);
1045        vcc = ATM_SKB(skb)->vcc;
1046        NULLCHECK(vcc);
1047        eni_dev = ENI_DEV(vcc->dev);
1048        NULLCHECK(eni_dev);
1049        eni_vcc = ENI_VCC(vcc);
1050        tx = eni_vcc->tx;
1051        NULLCHECK(tx);
1052#if 0 /* Enable this for testing with the "align" program */
1053        {
1054                unsigned int hack = *((char *) skb->data)-'0';
1055
1056                if (hack < 8) {
1057                        skb->data += hack;
1058                        skb->len -= hack;
1059                }
1060        }
1061#endif
1062#if 0 /* should work now */
1063        if ((unsigned long) skb->data & 3)
1064                printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned "
1065                    "TX data\n",vcc->dev->number,vcc->vci);
1066#endif
1067        /*
1068         * Potential future IP speedup: make hard_header big enough to put
1069         * segmentation descriptor directly into PDU. Saves: 4 slave writes,
1070         * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-)
1071         */
1072
1073        aal5 = vcc->qos.aal == ATM_AAL5;
1074        /* check space in buffer */
1075        if (!aal5)
1076                size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE;
1077                        /* cell without HEC plus segmentation header (includes
1078                           four-byte cell header) */
1079        else {
1080                size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1;
1081                        /* add AAL5 trailer */
1082                size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE;
1083                                                /* add segmentation header */
1084        }
1085        /*
1086         * Can I move tx_pos by size bytes without getting closer than TX_GAP
1087         * to the read pointer ? TX_GAP means to leave some space for what
1088         * the manual calls "too close".
1089         */
1090        if (!NEPMOK(tx->tx_pos,size+TX_GAP,
1091            eni_in(MID_TX_RDPTR(tx->index)),tx->words)) {
1092                DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n",
1093                    vcc->dev->number,size);
1094                return enq_next;
1095        }
1096        /* check DMA */
1097        dma_wr = eni_in(MID_DMA_WR_TX);
1098        dma_rd = eni_in(MID_DMA_RD_TX);
1099        dma_size = 3; /* JK for descriptor and final fill, plus final size
1100                         mis-alignment fix */
1101DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
1102        if (!skb_shinfo(skb)->nr_frags) dma_size += 5;
1103        else dma_size += 5*(skb_shinfo(skb)->nr_frags+1);
1104        if (dma_size > TX_DMA_BUF) {
1105                printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries "
1106                    "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF);
1107        }
1108        DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos);
1109        if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) <
1110             dma_size) {
1111                printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n",
1112                    vcc->dev->number);
1113                return enq_jam;
1114        }
1115        paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
1116                               DMA_TO_DEVICE);
1117        ENI_PRV_PADDR(skb) = paddr;
1118        /* prepare DMA queue entries */
1119        j = 0;
1120        eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1121             MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1122             MID_DT_JK;
1123        j++;
1124        if (!skb_shinfo(skb)->nr_frags)
1125                if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1126                else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1127        else {
1128DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1129                for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1130                        if (i == -1)
1131                                put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1132                                    skb->data,
1133                                    skb_headlen(skb));
1134                        else
1135                                put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1136                                    skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1137                                        skb_shinfo(skb)->frags[i].page_offset,
1138                                    skb_frag_size(&skb_shinfo(skb)->frags[i]));
1139        }
1140        if (skb->len & 3) {
1141                put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1142                        4 - (skb->len & 3));
1143        }
1144        /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1145        eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1146             MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1147             MID_DMA_END | MID_DT_JK;
1148        j++;
1149        DPRINTK("DMA at end: %d\n",j);
1150        /* store frame */
1151        writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1152            (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1153            (tx->resolution << MID_SEG_RATE_SHIFT) |
1154            (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1155/*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1156        writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1157            (aal5 ? 0 : (skb->data[3] & 0xf)) |
1158            (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1159            tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1160        DPRINTK("size: %d, len:%d\n",size,skb->len);
1161        if (aal5)
1162                writel(skb->len,tx->send+
1163                    ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1164        j = j >> 1;
1165        for (i = 0; i < j; i++) {
1166                writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1167                writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1168                dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1169        }
1170        ENI_PRV_POS(skb) = tx->tx_pos;
1171        ENI_PRV_SIZE(skb) = size;
1172        ENI_VCC(vcc)->txing += size;
1173        tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1174        DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1175        eni_out(dma_wr,MID_DMA_WR_TX);
1176        skb_queue_tail(&eni_dev->tx_queue,skb);
1177queued++;
1178        return enq_ok;
1179}
1180
1181
1182static void poll_tx(struct atm_dev *dev)
1183{
1184        struct eni_tx *tx;
1185        struct sk_buff *skb;
1186        enum enq_res res;
1187        int i;
1188
1189        DPRINTK(">poll_tx\n");
1190        for (i = NR_CHAN-1; i >= 0; i--) {
1191                tx = &ENI_DEV(dev)->tx[i];
1192                if (tx->send)
1193                        while ((skb = skb_dequeue(&tx->backlog))) {
1194                                res = do_tx(skb);
1195                                if (res == enq_ok) continue;
1196                                DPRINTK("re-queuing TX PDU\n");
1197                                skb_queue_head(&tx->backlog,skb);
1198requeued++;
1199                                if (res == enq_jam) return;
1200                                break;
1201                        }
1202        }
1203}
1204
1205
1206static void dequeue_tx(struct atm_dev *dev)
1207{
1208        struct eni_dev *eni_dev;
1209        struct atm_vcc *vcc;
1210        struct sk_buff *skb;
1211        struct eni_tx *tx;
1212
1213        NULLCHECK(dev);
1214        eni_dev = ENI_DEV(dev);
1215        NULLCHECK(eni_dev);
1216        while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1217                vcc = ATM_SKB(skb)->vcc;
1218                NULLCHECK(vcc);
1219                tx = ENI_VCC(vcc)->tx;
1220                NULLCHECK(ENI_VCC(vcc)->tx);
1221                DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1222                    (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1223                if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1224                    eni_in(MID_TX_DESCRSTART(tx->index))) {
1225                        skb_queue_head(&eni_dev->tx_queue,skb);
1226                        break;
1227                }
1228                ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1229                dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
1230                                 DMA_TO_DEVICE);
1231                if (vcc->pop) vcc->pop(vcc,skb);
1232                else dev_kfree_skb_irq(skb);
1233                atomic_inc(&vcc->stats->tx);
1234                wake_up(&eni_dev->tx_wait);
1235dma_complete++;
1236        }
1237}
1238
1239
1240static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1241{
1242        int i;
1243
1244        for (i = !ubr; i < NR_CHAN; i++)
1245                if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1246        return NULL;
1247}
1248
1249
1250static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1251    int *res,int unlimited)
1252{
1253        static const int pre_div[] = { 4,16,128,2048 };
1254            /* 2^(((x+2)^2-(x+2))/2+1) */
1255
1256        if (unlimited) *pre = *res = 0;
1257        else {
1258                if (*pcr > 0) {
1259                        int div;
1260
1261                        for (*pre = 0; *pre < 3; (*pre)++)
1262                                if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1263                        div = pre_div[*pre]**pcr;
1264                        DPRINTK("min div %d\n",div);
1265                        *res = TS_CLOCK/div-1;
1266                }
1267                else {
1268                        int div;
1269
1270                        if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1271                        for (*pre = 3; *pre >= 0; (*pre)--)
1272                                if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1273                        if (*pre < 3) (*pre)++; /* else fail later */
1274                        div = pre_div[*pre]*-*pcr;
1275                        DPRINTK("max div %d\n",div);
1276                        *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1277                }
1278                if (*res < 0) *res = 0;
1279                if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1280        }
1281        *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1282        DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1283        return 0;
1284}
1285
1286
1287static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1288    int set_rsv,int set_shp)
1289{
1290        struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1291        struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1292        struct eni_tx *tx;
1293        unsigned long size;
1294        void __iomem *mem;
1295        int rate,ubr,unlimited,new_tx;
1296        int pre,res,order;
1297        int error;
1298
1299        rate = atm_pcr_goal(txtp);
1300        ubr = txtp->traffic_class == ATM_UBR;
1301        unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1302            rate >= ATM_OC3_PCR);
1303        if (!unlimited) {
1304                size = txtp->max_sdu*eni_dev->tx_mult/100;
1305                if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1306                    MID_MAX_BUF_SIZE)
1307                        size = MID_MAX_BUF_SIZE;
1308        }
1309        else {
1310                if (eni_dev->ubr) {
1311                        eni_vcc->tx = eni_dev->ubr;
1312                        txtp->pcr = ATM_OC3_PCR;
1313                        return 0;
1314                }
1315                size = UBR_BUFFER;
1316        }
1317        new_tx = !eni_vcc->tx;
1318        mem = NULL; /* for gcc */
1319        if (!new_tx) tx = eni_vcc->tx;
1320        else {
1321                mem = eni_alloc_mem(eni_dev,&size);
1322                if (!mem) return -ENOBUFS;
1323                tx = alloc_tx(eni_dev,unlimited);
1324                if (!tx) {
1325                        eni_free_mem(eni_dev,mem,size);
1326                        return -EBUSY;
1327                }
1328                DPRINTK("got chan %d\n",tx->index);
1329                tx->reserved = tx->shaping = 0;
1330                tx->send = mem;
1331                tx->words = size >> 2;
1332                skb_queue_head_init(&tx->backlog);
1333                for (order = 0; size > (1 << (order+10)); order++);
1334                eni_out((order << MID_SIZE_SHIFT) |
1335                    ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1336                    MID_TX_PLACE(tx->index));
1337                tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1338                    MID_DESCR_START;
1339        }
1340        error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1341        if (!error  && txtp->min_pcr > rate) error = -EINVAL;
1342        if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1343            txtp->max_pcr < rate) error = -EINVAL;
1344        if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1345                error = -EINVAL;
1346        if (!error && set_rsv && !set_shp && rate < tx->shaping)
1347                error = -EINVAL;
1348        if (!error && !set_rsv && rate > tx->reserved && !ubr)
1349                error = -EINVAL;
1350        if (error) {
1351                if (new_tx) {
1352                        tx->send = NULL;
1353                        eni_free_mem(eni_dev,mem,size);
1354                }
1355                return error;
1356        }
1357        txtp->pcr = rate;
1358        if (set_rsv && !ubr) {
1359                eni_dev->tx_bw += tx->reserved;
1360                tx->reserved = rate;
1361                eni_dev->tx_bw -= rate;
1362        }
1363        if (set_shp || (unlimited && new_tx)) {
1364                if (unlimited && new_tx) eni_dev->ubr = tx;
1365                tx->prescaler = pre;
1366                tx->resolution = res;
1367                tx->shaping = rate;
1368        }
1369        if (set_shp) eni_vcc->tx = tx;
1370        DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1371        return 0;
1372}
1373
1374
1375static int open_tx_first(struct atm_vcc *vcc)
1376{
1377        ENI_VCC(vcc)->tx = NULL;
1378        if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1379        ENI_VCC(vcc)->txing = 0;
1380        return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1381}
1382
1383
1384static int open_tx_second(struct atm_vcc *vcc)
1385{
1386        return 0; /* nothing to do */
1387}
1388
1389
1390static void close_tx(struct atm_vcc *vcc)
1391{
1392        DECLARE_WAITQUEUE(wait,current);
1393        struct eni_dev *eni_dev;
1394        struct eni_vcc *eni_vcc;
1395
1396        eni_vcc = ENI_VCC(vcc);
1397        if (!eni_vcc->tx) return;
1398        eni_dev = ENI_DEV(vcc->dev);
1399        /* wait for TX queue to drain */
1400        DPRINTK("eni_close: waiting for TX ...\n");
1401        add_wait_queue(&eni_dev->tx_wait,&wait);
1402        set_current_state(TASK_UNINTERRUPTIBLE);
1403        for (;;) {
1404                int txing;
1405
1406                tasklet_disable(&eni_dev->task);
1407                txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1408                tasklet_enable(&eni_dev->task);
1409                if (!txing) break;
1410                DPRINTK("%d TX left\n",eni_vcc->txing);
1411                schedule();
1412                set_current_state(TASK_UNINTERRUPTIBLE);
1413        }
1414        set_current_state(TASK_RUNNING);
1415        remove_wait_queue(&eni_dev->tx_wait,&wait);
1416        if (eni_vcc->tx != eni_dev->ubr) {
1417                /*
1418                 * Looping a few times in here is probably far cheaper than
1419                 * keeping track of TX completions all the time, so let's poll
1420                 * a bit ...
1421                 */
1422                while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1423                    eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1424                        schedule();
1425                eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1426                eni_vcc->tx->send = NULL;
1427                eni_dev->tx_bw += eni_vcc->tx->reserved;
1428        }
1429        eni_vcc->tx = NULL;
1430}
1431
1432
1433static int start_tx(struct atm_dev *dev)
1434{
1435        struct eni_dev *eni_dev;
1436        int i;
1437
1438        eni_dev = ENI_DEV(dev);
1439        eni_dev->lost = 0;
1440        eni_dev->tx_bw = ATM_OC3_PCR;
1441        eni_dev->tx_mult = DEFAULT_TX_MULT;
1442        init_waitqueue_head(&eni_dev->tx_wait);
1443        eni_dev->ubr = NULL;
1444        skb_queue_head_init(&eni_dev->tx_queue);
1445        eni_out(0,MID_DMA_WR_TX);
1446        for (i = 0; i < NR_CHAN; i++) {
1447                eni_dev->tx[i].send = NULL;
1448                eni_dev->tx[i].index = i;
1449        }
1450        return 0;
1451}
1452
1453
1454/*--------------------------------- common ----------------------------------*/
1455
1456
1457#if 0 /* may become useful again when tuning things */
1458
1459static void foo(void)
1460{
1461printk(KERN_INFO
1462  "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1463  "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1464  tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1465  rx_enqueued,rx_dequeued,putting,pushed);
1466if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1467}
1468
1469#endif
1470
1471
1472static void bug_int(struct atm_dev *dev,unsigned long reason)
1473{
1474        DPRINTK(">bug_int\n");
1475        if (reason & MID_DMA_ERR_ACK)
1476                printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1477                    "error\n",dev->number);
1478        if (reason & MID_TX_IDENT_MISM)
1479                printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1480                    "mismatch\n",dev->number);
1481        if (reason & MID_TX_DMA_OVFL)
1482                printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1483                    "overflow\n",dev->number);
1484        EVENT("---dump ends here---\n",0,0);
1485        printk(KERN_NOTICE "---recent events---\n");
1486        event_dump();
1487}
1488
1489
1490static irqreturn_t eni_int(int irq,void *dev_id)
1491{
1492        struct atm_dev *dev;
1493        struct eni_dev *eni_dev;
1494        u32 reason;
1495
1496        DPRINTK(">eni_int\n");
1497        dev = dev_id;
1498        eni_dev = ENI_DEV(dev);
1499        reason = eni_in(MID_ISA);
1500        DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1501        /*
1502         * Must handle these two right now, because reading ISA doesn't clear
1503         * them, so they re-occur and we never make it to the tasklet. Since
1504         * they're rare, we don't mind the occasional invocation of eni_tasklet
1505         * with eni_dev->events == 0.
1506         */
1507        if (reason & MID_STAT_OVFL) {
1508                EVENT("stat overflow\n",0,0);
1509                eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1510        }
1511        if (reason & MID_SUNI_INT) {
1512                EVENT("SUNI int\n",0,0);
1513                dev->phy->interrupt(dev);
1514#if 0
1515                foo();
1516#endif
1517        }
1518        spin_lock(&eni_dev->lock);
1519        eni_dev->events |= reason;
1520        spin_unlock(&eni_dev->lock);
1521        tasklet_schedule(&eni_dev->task);
1522        return IRQ_HANDLED;
1523}
1524
1525
1526static void eni_tasklet(unsigned long data)
1527{
1528        struct atm_dev *dev = (struct atm_dev *) data;
1529        struct eni_dev *eni_dev = ENI_DEV(dev);
1530        unsigned long flags;
1531        u32 events;
1532
1533        DPRINTK("eni_tasklet (dev %p)\n",dev);
1534        spin_lock_irqsave(&eni_dev->lock,flags);
1535        events = xchg(&eni_dev->events,0);
1536        spin_unlock_irqrestore(&eni_dev->lock,flags);
1537        if (events & MID_RX_DMA_COMPLETE) {
1538                EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1539                dequeue_rx(dev);
1540                EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1541                poll_rx(dev);
1542                EVENT("poll_rx done\n",0,0);
1543                /* poll_tx ? */
1544        }
1545        if (events & MID_SERVICE) {
1546                EVENT("INT: service, starting get_service\n",0,0);
1547                get_service(dev);
1548                EVENT("get_service done, starting poll_rx\n",0,0);
1549                poll_rx(dev);
1550                EVENT("poll_rx done\n",0,0);
1551        }
1552        if (events & MID_TX_DMA_COMPLETE) {
1553                EVENT("INT: TX DMA COMPLETE\n",0,0);
1554                dequeue_tx(dev);
1555        }
1556        if (events & MID_TX_COMPLETE) {
1557                EVENT("INT: TX COMPLETE\n",0,0);
1558tx_complete++;
1559                wake_up(&eni_dev->tx_wait);
1560                /* poll_rx ? */
1561        }
1562        if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1563                EVENT("bug interrupt\n",0,0);
1564                bug_int(dev,events);
1565        }
1566        poll_tx(dev);
1567}
1568
1569
1570/*--------------------------------- entries ---------------------------------*/
1571
1572
1573static char * const media_name[] = {
1574    "MMF", "SMF", "MMF", "03?", /*  0- 3 */
1575    "UTP", "05?", "06?", "07?", /*  4- 7 */
1576    "TAXI","09?", "10?", "11?", /*  8-11 */
1577    "12?", "13?", "14?", "15?", /* 12-15 */
1578    "MMF", "SMF", "18?", "19?", /* 16-19 */
1579    "UTP", "21?", "22?", "23?", /* 20-23 */
1580    "24?", "25?", "26?", "27?", /* 24-27 */
1581    "28?", "29?", "30?", "31?"  /* 28-31 */
1582};
1583
1584
1585#define SET_SEPROM \
1586  ({ if (!error && !pci_error) { \
1587    pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1588    udelay(10); /* 10 usecs */ \
1589  } })
1590#define GET_SEPROM \
1591  ({ if (!error && !pci_error) { \
1592    pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1593    udelay(10); /* 10 usecs */ \
1594  } })
1595
1596
1597static int get_esi_asic(struct atm_dev *dev)
1598{
1599        struct eni_dev *eni_dev;
1600        unsigned char tonga;
1601        int error,failed,pci_error;
1602        int address,i,j;
1603
1604        eni_dev = ENI_DEV(dev);
1605        error = pci_error = 0;
1606        tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1607        SET_SEPROM;
1608        for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1609                /* start operation */
1610                tonga |= SEPROM_DATA;
1611                SET_SEPROM;
1612                tonga |= SEPROM_CLK;
1613                SET_SEPROM;
1614                tonga &= ~SEPROM_DATA;
1615                SET_SEPROM;
1616                tonga &= ~SEPROM_CLK;
1617                SET_SEPROM;
1618                /* send address */
1619                address = ((i+SEPROM_ESI_BASE) << 1)+1;
1620                for (j = 7; j >= 0; j--) {
1621                        tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1622                            tonga & ~SEPROM_DATA;
1623                        SET_SEPROM;
1624                        tonga |= SEPROM_CLK;
1625                        SET_SEPROM;
1626                        tonga &= ~SEPROM_CLK;
1627                        SET_SEPROM;
1628                }
1629                /* get ack */
1630                tonga |= SEPROM_DATA;
1631                SET_SEPROM;
1632                tonga |= SEPROM_CLK;
1633                SET_SEPROM;
1634                GET_SEPROM;
1635                failed = tonga & SEPROM_DATA;
1636                tonga &= ~SEPROM_CLK;
1637                SET_SEPROM;
1638                tonga |= SEPROM_DATA;
1639                SET_SEPROM;
1640                if (failed) error = -EIO;
1641                else {
1642                        dev->esi[i] = 0;
1643                        for (j = 7; j >= 0; j--) {
1644                                dev->esi[i] <<= 1;
1645                                tonga |= SEPROM_DATA;
1646                                SET_SEPROM;
1647                                tonga |= SEPROM_CLK;
1648                                SET_SEPROM;
1649                                GET_SEPROM;
1650                                if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1651                                tonga &= ~SEPROM_CLK;
1652                                SET_SEPROM;
1653                                tonga |= SEPROM_DATA;
1654                                SET_SEPROM;
1655                        }
1656                        /* get ack */
1657                        tonga |= SEPROM_DATA;
1658                        SET_SEPROM;
1659                        tonga |= SEPROM_CLK;
1660                        SET_SEPROM;
1661                        GET_SEPROM;
1662                        if (!(tonga & SEPROM_DATA)) error = -EIO;
1663                        tonga &= ~SEPROM_CLK;
1664                        SET_SEPROM;
1665                        tonga |= SEPROM_DATA;
1666                        SET_SEPROM;
1667                }
1668                /* stop operation */
1669                tonga &= ~SEPROM_DATA;
1670                SET_SEPROM;
1671                tonga |= SEPROM_CLK;
1672                SET_SEPROM;
1673                tonga |= SEPROM_DATA;
1674                SET_SEPROM;
1675        }
1676        if (pci_error) {
1677                printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1678                    "(0x%02x)\n",dev->number,pci_error);
1679                error = -EIO;
1680        }
1681        return error;
1682}
1683
1684
1685#undef SET_SEPROM
1686#undef GET_SEPROM
1687
1688
1689static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1690{
1691        void __iomem *mac_base;
1692        int i;
1693
1694        mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1695        for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1696        return 0;
1697}
1698
1699
1700static int eni_do_init(struct atm_dev *dev)
1701{
1702        struct midway_eprom __iomem *eprom;
1703        struct eni_dev *eni_dev;
1704        struct pci_dev *pci_dev;
1705        unsigned long real_base;
1706        void __iomem *base;
1707        int error,i,last;
1708
1709        DPRINTK(">eni_init\n");
1710        dev->ci_range.vpi_bits = 0;
1711        dev->ci_range.vci_bits = NR_VCI_LD;
1712        dev->link_rate = ATM_OC3_PCR;
1713        eni_dev = ENI_DEV(dev);
1714        pci_dev = eni_dev->pci_dev;
1715        real_base = pci_resource_start(pci_dev, 0);
1716        eni_dev->irq = pci_dev->irq;
1717        if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1718            PCI_COMMAND_MEMORY |
1719            (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1720                printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1721                    "(0x%02x)\n",dev->number,error);
1722                return -EIO;
1723        }
1724        printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1725            dev->number,pci_dev->revision,real_base,eni_dev->irq);
1726        if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) {
1727                printk("\n");
1728                printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1729                    "mapping\n",dev->number);
1730                return error;
1731        }
1732        eni_dev->ioaddr = base;
1733        eni_dev->base_diff = real_base - (unsigned long) base;
1734        /* id may not be present in ASIC Tonga boards - check this @@@ */
1735        if (!eni_dev->asic) {
1736                eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1737                if (readl(&eprom->magic) != ENI155_MAGIC) {
1738                        printk("\n");
1739                        printk(KERN_ERR DEV_LABEL
1740                               "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1741                               dev->number, ENI155_MAGIC,
1742                               (unsigned)readl(&eprom->magic));
1743                        error = -EINVAL;
1744                        goto unmap;
1745                }
1746        }
1747        eni_dev->phy = base+PHY_BASE;
1748        eni_dev->reg = base+REG_BASE;
1749        eni_dev->ram = base+RAM_BASE;
1750        last = MAP_MAX_SIZE-RAM_BASE;
1751        for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1752                writel(0x55555555,eni_dev->ram+i);
1753                if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1754                else {
1755                        writel(0xAAAAAAAA,eni_dev->ram+i);
1756                        if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1757                        else writel(i,eni_dev->ram+i);
1758                }
1759        }
1760        for (i = 0; i < last; i += RAM_INCREMENT)
1761                if (readl(eni_dev->ram+i) != i) break;
1762        eni_dev->mem = i;
1763        memset_io(eni_dev->ram,0,eni_dev->mem);
1764        /* TODO: should shrink allocation now */
1765        printk("mem=%dkB (",eni_dev->mem >> 10);
1766        /* TODO: check for non-SUNI, check for TAXI ? */
1767        if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1768                printk(")\n");
1769                printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1770                    dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1771                error = -EINVAL;
1772                goto unmap;
1773        }
1774        error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1775        if (error)
1776                goto unmap;
1777        for (i = 0; i < ESI_LEN; i++)
1778                printk("%s%02X",i ? "-" : "",dev->esi[i]);
1779        printk(")\n");
1780        printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1781            eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1782            media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]);
1783
1784        error = suni_init(dev);
1785        if (error)
1786                goto unmap;
1787out:
1788        return error;
1789unmap:
1790        iounmap(base);
1791        goto out;
1792}
1793
1794static void eni_do_release(struct atm_dev *dev)
1795{
1796        struct eni_dev *ed = ENI_DEV(dev);
1797
1798        dev->phy->stop(dev);
1799        dev->phy = NULL;
1800        iounmap(ed->ioaddr);
1801}
1802
1803static int eni_start(struct atm_dev *dev)
1804{
1805        struct eni_dev *eni_dev;
1806        
1807        void __iomem *buf;
1808        unsigned long buffer_mem;
1809        int error;
1810
1811        DPRINTK(">eni_start\n");
1812        eni_dev = ENI_DEV(dev);
1813        if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1814                printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1815                    dev->number,eni_dev->irq);
1816                error = -EAGAIN;
1817                goto out;
1818        }
1819        pci_set_master(eni_dev->pci_dev);
1820        if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1821            PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1822            (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1823                printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1824                    "master (0x%02x)\n",dev->number,error);
1825                goto free_irq;
1826        }
1827        if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1828            END_SWAP_DMA))) {
1829                printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1830                    "(0x%02x)\n",dev->number,error);
1831                goto free_irq;
1832        }
1833        /* determine addresses of internal tables */
1834        eni_dev->vci = eni_dev->ram;
1835        eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1836        eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1837        eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1838        buf = eni_dev->service+NR_SERVICE*4;
1839        DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1840             eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1841             eni_dev->service,buf);
1842        spin_lock_init(&eni_dev->lock);
1843        tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1844        eni_dev->events = 0;
1845        /* initialize memory management */
1846        buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1847        eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1848        eni_dev->free_list = kmalloc(
1849            sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL);
1850        if (!eni_dev->free_list) {
1851                printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1852                    dev->number);
1853                error = -ENOMEM;
1854                goto free_irq;
1855        }
1856        eni_dev->free_len = 0;
1857        eni_put_free(eni_dev,buf,buffer_mem);
1858        memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1859        /*
1860         * byte_addr  free (k)
1861         * 0x00000000     512  VCI table
1862         * 0x00004000     496  RX DMA
1863         * 0x00005000     492  TX DMA
1864         * 0x00006000     488  service list
1865         * 0x00007000     484  buffers
1866         * 0x00080000       0  end (512kB)
1867         */
1868        eni_out(0xffffffff,MID_IE);
1869        error = start_tx(dev);
1870        if (error) goto free_list;
1871        error = start_rx(dev);
1872        if (error) goto free_list;
1873        error = dev->phy->start(dev);
1874        if (error) goto free_list;
1875        eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1876            MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1877            MID_MC_S);
1878            /* Tonga uses SBus INTReq1 */
1879        (void) eni_in(MID_ISA); /* clear Midway interrupts */
1880        return 0;
1881
1882free_list:
1883        kfree(eni_dev->free_list);
1884
1885free_irq:
1886        free_irq(eni_dev->irq, dev);
1887
1888out:
1889        return error;
1890}
1891
1892
1893static void eni_close(struct atm_vcc *vcc)
1894{
1895        DPRINTK(">eni_close\n");
1896        if (!ENI_VCC(vcc)) return;
1897        clear_bit(ATM_VF_READY,&vcc->flags);
1898        close_rx(vcc);
1899        close_tx(vcc);
1900        DPRINTK("eni_close: done waiting\n");
1901        /* deallocate memory */
1902        kfree(ENI_VCC(vcc));
1903        vcc->dev_data = NULL;
1904        clear_bit(ATM_VF_ADDR,&vcc->flags);
1905        /*foo();*/
1906}
1907
1908
1909static int eni_open(struct atm_vcc *vcc)
1910{
1911        struct eni_vcc *eni_vcc;
1912        int error;
1913        short vpi = vcc->vpi;
1914        int vci = vcc->vci;
1915
1916        DPRINTK(">eni_open\n");
1917        EVENT("eni_open\n",0,0);
1918        if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1919                vcc->dev_data = NULL;
1920        if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1921                set_bit(ATM_VF_ADDR,&vcc->flags);
1922        if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1923                return -EINVAL;
1924        DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1925            vcc->vci);
1926        if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1927                eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1928                if (!eni_vcc) return -ENOMEM;
1929                vcc->dev_data = eni_vcc;
1930                eni_vcc->tx = NULL; /* for eni_close after open_rx */
1931                if ((error = open_rx_first(vcc))) {
1932                        eni_close(vcc);
1933                        return error;
1934                }
1935                if ((error = open_tx_first(vcc))) {
1936                        eni_close(vcc);
1937                        return error;
1938                }
1939        }
1940        if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1941        if ((error = open_rx_second(vcc))) {
1942                eni_close(vcc);
1943                return error;
1944        }
1945        if ((error = open_tx_second(vcc))) {
1946                eni_close(vcc);
1947                return error;
1948        }
1949        set_bit(ATM_VF_READY,&vcc->flags);
1950        /* should power down SUNI while !ref_count @@@ */
1951        return 0;
1952}
1953
1954
1955static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1956{
1957        struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1958        struct eni_tx *tx = ENI_VCC(vcc)->tx;
1959        struct sk_buff *skb;
1960        int error,rate,rsv,shp;
1961
1962        if (qos->txtp.traffic_class == ATM_NONE) return 0;
1963        if (tx == eni_dev->ubr) return -EBADFD;
1964        rate = atm_pcr_goal(&qos->txtp);
1965        if (rate < 0) rate = -rate;
1966        rsv = shp = 0;
1967        if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1968        if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1969        if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1970        if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1971        if (!rsv && !shp) return 0;
1972        error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1973        if (error) return error;
1974        if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1975        /*
1976         * Walk through the send buffer and patch the rate information in all
1977         * segmentation buffer descriptors of this VCC.
1978         */
1979        tasklet_disable(&eni_dev->task);
1980        skb_queue_walk(&eni_dev->tx_queue, skb) {
1981                void __iomem *dsc;
1982
1983                if (ATM_SKB(skb)->vcc != vcc) continue;
1984                dsc = tx->send+ENI_PRV_POS(skb)*4;
1985                writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1986                    (tx->prescaler << MID_SEG_PR_SHIFT) |
1987                    (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1988        }
1989        tasklet_enable(&eni_dev->task);
1990        return 0;
1991}
1992
1993
1994static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1995{
1996        struct eni_dev *eni_dev = ENI_DEV(dev);
1997
1998        if (cmd == ENI_MEMDUMP) {
1999                if (!capable(CAP_NET_ADMIN)) return -EPERM;
2000                printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
2001                    "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
2002                dump(dev);
2003                return 0;
2004        }
2005        if (cmd == ENI_SETMULT) {
2006                struct eni_multipliers mult;
2007
2008                if (!capable(CAP_NET_ADMIN)) return -EPERM;
2009                if (copy_from_user(&mult, arg,
2010                    sizeof(struct eni_multipliers)))
2011                        return -EFAULT;
2012                if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2013                    mult.tx > 65536 || mult.rx > 65536)
2014                        return -EINVAL;
2015                if (mult.tx) eni_dev->tx_mult = mult.tx;
2016                if (mult.rx) eni_dev->rx_mult = mult.rx;
2017                return 0;
2018        }
2019        if (cmd == ATM_SETCIRANGE) {
2020                struct atm_cirange ci;
2021
2022                if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2023                        return -EFAULT;
2024                if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2025                    (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2026                    return 0;
2027                return -EINVAL;
2028        }
2029        if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2030        return dev->phy->ioctl(dev,cmd,arg);
2031}
2032
2033
2034static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,
2035    void __user *optval,int optlen)
2036{
2037        return -EINVAL;
2038}
2039
2040
2041static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
2042    void __user *optval,unsigned int optlen)
2043{
2044        return -EINVAL;
2045}
2046
2047
2048static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2049{
2050        enum enq_res res;
2051
2052        DPRINTK(">eni_send\n");
2053        if (!ENI_VCC(vcc)->tx) {
2054                if (vcc->pop) vcc->pop(vcc,skb);
2055                else dev_kfree_skb(skb);
2056                return -EINVAL;
2057        }
2058        if (!skb) {
2059                printk(KERN_CRIT "!skb in eni_send ?\n");
2060                if (vcc->pop) vcc->pop(vcc,skb);
2061                return -EINVAL;
2062        }
2063        if (vcc->qos.aal == ATM_AAL0) {
2064                if (skb->len != ATM_CELL_SIZE-1) {
2065                        if (vcc->pop) vcc->pop(vcc,skb);
2066                        else dev_kfree_skb(skb);
2067                        return -EINVAL;
2068                }
2069                *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2070        }
2071submitted++;
2072        ATM_SKB(skb)->vcc = vcc;
2073        tasklet_disable(&ENI_DEV(vcc->dev)->task);
2074        res = do_tx(skb);
2075        tasklet_enable(&ENI_DEV(vcc->dev)->task);
2076        if (res == enq_ok) return 0;
2077        skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2078backlogged++;
2079        tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2080        return 0;
2081}
2082
2083static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2084    unsigned long addr)
2085{
2086        writel(value,ENI_DEV(dev)->phy+addr*4);
2087}
2088
2089
2090
2091static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2092{
2093        return readl(ENI_DEV(dev)->phy+addr*4);
2094}
2095
2096
2097static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2098{
2099        struct sock *s;
2100        static const char *signal[] = { "LOST","unknown","okay" };
2101        struct eni_dev *eni_dev = ENI_DEV(dev);
2102        struct atm_vcc *vcc;
2103        int left,i;
2104
2105        left = *pos;
2106        if (!left)
2107                return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2108                    "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2109                    eni_dev->mem >> 10,eni_dev->tx_bw);
2110        if (!--left)
2111                return sprintf(page,"%4sBursts: TX"
2112#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2113    !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2114    !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2115    !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2116                    " none"
2117#endif
2118#ifdef CONFIG_ATM_ENI_BURST_TX_16W
2119                    " 16W"
2120#endif
2121#ifdef CONFIG_ATM_ENI_BURST_TX_8W
2122                    " 8W"
2123#endif
2124#ifdef CONFIG_ATM_ENI_BURST_TX_4W
2125                    " 4W"
2126#endif
2127#ifdef CONFIG_ATM_ENI_BURST_TX_2W
2128                    " 2W"
2129#endif
2130                    ", RX"
2131#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2132    !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2133    !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2134    !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2135                    " none"
2136#endif
2137#ifdef CONFIG_ATM_ENI_BURST_RX_16W
2138                    " 16W"
2139#endif
2140#ifdef CONFIG_ATM_ENI_BURST_RX_8W
2141                    " 8W"
2142#endif
2143#ifdef CONFIG_ATM_ENI_BURST_RX_4W
2144                    " 4W"
2145#endif
2146#ifdef CONFIG_ATM_ENI_BURST_RX_2W
2147                    " 2W"
2148#endif
2149#ifndef CONFIG_ATM_ENI_TUNE_BURST
2150                    " (default)"
2151#endif
2152                    "\n","");
2153        if (!--left) 
2154                return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2155                    "",eni_dev->tx_mult,eni_dev->rx_mult);
2156        for (i = 0; i < NR_CHAN; i++) {
2157                struct eni_tx *tx = eni_dev->tx+i;
2158
2159                if (!tx->send) continue;
2160                if (!--left) {
2161                        return sprintf(page, "tx[%d]:    0x%lx-0x%lx "
2162                            "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2163                            (unsigned long) (tx->send - eni_dev->ram),
2164                            tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2165                            tx->reserved,tx->shaping,
2166                            tx == eni_dev->ubr ? " (UBR)" : "");
2167                }
2168                if (--left) continue;
2169                return sprintf(page,"%10sbacklog %u packets\n","",
2170                    skb_queue_len(&tx->backlog));
2171        }
2172        read_lock(&vcc_sklist_lock);
2173        for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2174                struct hlist_head *head = &vcc_hash[i];
2175
2176                sk_for_each(s, head) {
2177                        struct eni_vcc *eni_vcc;
2178                        int length;
2179
2180                        vcc = atm_sk(s);
2181                        if (vcc->dev != dev)
2182                                continue;
2183                        eni_vcc = ENI_VCC(vcc);
2184                        if (--left) continue;
2185                        length = sprintf(page,"vcc %4d: ",vcc->vci);
2186                        if (eni_vcc->rx) {
2187                                length += sprintf(page+length, "0x%lx-0x%lx "
2188                                    "(%6ld bytes)",
2189                                    (unsigned long) (eni_vcc->recv - eni_dev->ram),
2190                                    eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2191                                    eni_vcc->words*4);
2192                                if (eni_vcc->tx) length += sprintf(page+length,", ");
2193                        }
2194                        if (eni_vcc->tx)
2195                                length += sprintf(page+length,"tx[%d], txing %d bytes",
2196                                    eni_vcc->tx->index,eni_vcc->txing);
2197                        page[length] = '\n';
2198                        read_unlock(&vcc_sklist_lock);
2199                        return length+1;
2200                }
2201        }
2202        read_unlock(&vcc_sklist_lock);
2203        for (i = 0; i < eni_dev->free_len; i++) {
2204                struct eni_free *fe = eni_dev->free_list+i;
2205                unsigned long offset;
2206
2207                if (--left) continue;
2208                offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2209                return sprintf(page,"free      %p-%p (%6d bytes)\n",
2210                    fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2211                    1 << fe->order);
2212        }
2213        return 0;
2214}
2215
2216
2217static const struct atmdev_ops ops = {
2218        .open           = eni_open,
2219        .close          = eni_close,
2220        .ioctl          = eni_ioctl,
2221        .getsockopt     = eni_getsockopt,
2222        .setsockopt     = eni_setsockopt,
2223        .send           = eni_send,
2224        .phy_put        = eni_phy_put,
2225        .phy_get        = eni_phy_get,
2226        .change_qos     = eni_change_qos,
2227        .proc_read      = eni_proc_read
2228};
2229
2230
2231static int eni_init_one(struct pci_dev *pci_dev,
2232                        const struct pci_device_id *ent)
2233{
2234        struct atm_dev *dev;
2235        struct eni_dev *eni_dev;
2236        struct eni_zero *zero;
2237        int rc;
2238
2239        rc = pci_enable_device(pci_dev);
2240        if (rc < 0)
2241                goto out;
2242
2243        rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
2244        if (rc < 0)
2245                goto out;
2246
2247        rc = -ENOMEM;
2248        eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2249        if (!eni_dev)
2250                goto err_disable;
2251
2252        zero = &eni_dev->zero;
2253        zero->addr = dma_alloc_coherent(&pci_dev->dev,
2254                                        ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
2255        if (!zero->addr)
2256                goto err_kfree;
2257
2258        dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2259        if (!dev)
2260                goto err_free_consistent;
2261
2262        dev->dev_data = eni_dev;
2263        pci_set_drvdata(pci_dev, dev);
2264        eni_dev->pci_dev = pci_dev;
2265        eni_dev->asic = ent->driver_data;
2266
2267        rc = eni_do_init(dev);
2268        if (rc < 0)
2269                goto err_unregister;
2270
2271        rc = eni_start(dev);
2272        if (rc < 0)
2273                goto err_eni_release;
2274
2275        eni_dev->more = eni_boards;
2276        eni_boards = dev;
2277out:
2278        return rc;
2279
2280err_eni_release:
2281        eni_do_release(dev);
2282err_unregister:
2283        atm_dev_deregister(dev);
2284err_free_consistent:
2285        dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2286err_kfree:
2287        kfree(eni_dev);
2288err_disable:
2289        pci_disable_device(pci_dev);
2290        goto out;
2291}
2292
2293
2294static struct pci_device_id eni_pci_tbl[] = {
2295        { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2296        { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2297        { 0, }
2298};
2299MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2300
2301
2302static void eni_remove_one(struct pci_dev *pdev)
2303{
2304        struct atm_dev *dev = pci_get_drvdata(pdev);
2305        struct eni_dev *ed = ENI_DEV(dev);
2306        struct eni_zero *zero = &ed->zero;
2307
2308        eni_do_release(dev);
2309        atm_dev_deregister(dev);
2310        dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2311        kfree(ed);
2312        pci_disable_device(pdev);
2313}
2314
2315
2316static struct pci_driver eni_driver = {
2317        .name           = DEV_LABEL,
2318        .id_table       = eni_pci_tbl,
2319        .probe          = eni_init_one,
2320        .remove         = eni_remove_one,
2321};
2322
2323
2324static int __init eni_init(void)
2325{
2326        struct sk_buff *skb; /* dummy for sizeof */
2327
2328        if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) {
2329                printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n",
2330                    sizeof(skb->cb),sizeof(struct eni_skb_prv));
2331                return -EIO;
2332        }
2333        return pci_register_driver(&eni_driver);
2334}
2335
2336
2337module_init(eni_init);
2338/* @@@ since exit routine not defined, this module can not be unloaded */
2339
2340MODULE_LICENSE("GPL");
2341