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