linux/drivers/atm/eni.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/* drivers/atm/eni.c - Efficient Networks ENI155P device driver */
   3 
   4/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
   5 
   6
   7#include <linux/module.h>
   8#include <linux/kernel.h>
   9#include <linux/mm.h>
  10#include <linux/pci.h>
  11#include <linux/errno.h>
  12#include <linux/atm.h>
  13#include <linux/atmdev.h>
  14#include <linux/sonet.h>
  15#include <linux/skbuff.h>
  16#include <linux/time.h>
  17#include <linux/delay.h>
  18#include <linux/uio.h>
  19#include <linux/init.h>
  20#include <linux/atm_eni.h>
  21#include <linux/bitops.h>
  22#include <linux/slab.h>
  23#include <asm/io.h>
  24#include <linux/atomic.h>
  25#include <linux/uaccess.h>
  26#include <asm/string.h>
  27#include <asm/byteorder.h>
  28
  29#include "tonga.h"
  30#include "midway.h"
  31#include "suni.h"
  32#include "eni.h"
  33
  34/*
  35 * TODO:
  36 *
  37 * Show stoppers
  38 *  none
  39 *
  40 * Minor
  41 *  - OAM support
  42 *  - fix bugs listed below
  43 */
  44
  45/*
  46 * KNOWN BUGS:
  47 *
  48 * - may run into JK-JK bug and deadlock
  49 * - should allocate UBR channel first
  50 * - buffer space allocation algorithm is stupid
  51 *   (RX: should be maxSDU+maxdelay*rate
  52 *    TX: should be maxSDU+min(maxSDU,maxdelay*rate) )
  53 * - doesn't support OAM cells
  54 * - eni_put_free may hang if not putting memory fragments that _complete_
  55 *   2^n block (never happens in real life, though)
  56 */
  57
  58
  59#if 0
  60#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
  61#else
  62#define DPRINTK(format,args...)
  63#endif
  64
  65
  66#ifndef CONFIG_ATM_ENI_TUNE_BURST
  67#define CONFIG_ATM_ENI_BURST_TX_8W
  68#define CONFIG_ATM_ENI_BURST_RX_4W
  69#endif
  70
  71
  72#ifndef CONFIG_ATM_ENI_DEBUG
  73
  74
  75#define NULLCHECK(x)
  76
  77#define EVENT(s,a,b)
  78
  79
  80static void event_dump(void)
  81{
  82}
  83
  84
  85#else
  86
  87
  88/* 
  89 * NULL pointer checking
  90 */
  91
  92#define NULLCHECK(x) \
  93        if ((unsigned long) (x) < 0x30) \
  94                printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x))
  95
  96/*
  97 * Very extensive activity logging. Greatly improves bug detection speed but
  98 * costs a few Mbps if enabled.
  99 */
 100
 101#define EV 64
 102
 103static const char *ev[EV];
 104static unsigned long ev_a[EV],ev_b[EV];
 105static int ec = 0;
 106
 107
 108static void EVENT(const char *s,unsigned long a,unsigned long b)
 109{
 110        ev[ec] = s; 
 111        ev_a[ec] = a;
 112        ev_b[ec] = b;
 113        ec = (ec+1) % EV;
 114}
 115
 116
 117static void event_dump(void)
 118{
 119        int n,i;
 120
 121        for (n = 0; n < EV; n++) {
 122                i = (ec+n) % EV;
 123                printk(KERN_NOTICE);
 124                printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]);
 125        }
 126}
 127
 128
 129#endif /* CONFIG_ATM_ENI_DEBUG */
 130
 131
 132/*
 133 * NExx   must not be equal at end
 134 * EExx   may be equal at end
 135 * xxPJOK verify validity of pointer jumps
 136 * xxPMOK operating on a circular buffer of "c" words
 137 */
 138
 139#define NEPJOK(a0,a1,b) \
 140    ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1))
 141#define EEPJOK(a0,a1,b) \
 142    ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1))
 143#define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b)
 144#define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b)
 145
 146
 147static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0,
 148  backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0,
 149  putting = 0;
 150
 151static struct atm_dev *eni_boards = NULL;
 152
 153/* Read/write registers on card */
 154#define eni_in(r)       readl(eni_dev->reg+(r)*4)
 155#define eni_out(v,r)    writel((v),eni_dev->reg+(r)*4)
 156
 157
 158/*-------------------------------- utilities --------------------------------*/
 159
 160
 161static void dump_mem(struct eni_dev *eni_dev)
 162{
 163        int i;
 164
 165        for (i = 0; i < eni_dev->free_len; i++)
 166                printk(KERN_DEBUG "  %d: %p %d\n",i,
 167                    eni_dev->free_list[i].start,
 168                    1 << eni_dev->free_list[i].order);
 169}
 170
 171
 172static void dump(struct atm_dev *dev)
 173{
 174        struct eni_dev *eni_dev;
 175
 176        int i;
 177
 178        eni_dev = ENI_DEV(dev);
 179        printk(KERN_NOTICE "Free memory\n");
 180        dump_mem(eni_dev);
 181        printk(KERN_NOTICE "TX buffers\n");
 182        for (i = 0; i < NR_CHAN; i++)
 183                if (eni_dev->tx[i].send)
 184                        printk(KERN_NOTICE "  TX %d @ %p: %ld\n",i,
 185                            eni_dev->tx[i].send,eni_dev->tx[i].words*4);
 186        printk(KERN_NOTICE "RX buffers\n");
 187        for (i = 0; i < 1024; i++)
 188                if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx)
 189                        printk(KERN_NOTICE "  RX %d @ %p: %ld\n",i,
 190                            ENI_VCC(eni_dev->rx_map[i])->recv,
 191                            ENI_VCC(eni_dev->rx_map[i])->words*4);
 192        printk(KERN_NOTICE "----\n");
 193}
 194
 195
 196static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start,
 197    unsigned long size)
 198{
 199        struct eni_free *list;
 200        int len,order;
 201
 202        DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size);
 203        start += eni_dev->base_diff;
 204        list = eni_dev->free_list;
 205        len = eni_dev->free_len;
 206        while (size) {
 207                if (len >= eni_dev->free_list_size) {
 208                        printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n",
 209                            start,size);
 210                        break;
 211                }
 212                for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++);
 213                if (MID_MIN_BUF_SIZE > (1 << order)) {
 214                        printk(KERN_CRIT "eni_put_free: order %d too small\n",
 215                            order);
 216                        break;
 217                }
 218                list[len].start = (void __iomem *) start;
 219                list[len].order = order;
 220                len++;
 221                start += 1 << order;
 222                size -= 1 << order;
 223        }
 224        eni_dev->free_len = len;
 225        /*dump_mem(eni_dev);*/
 226}
 227
 228
 229static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size)
 230{
 231        struct eni_free *list;
 232        void __iomem *start;
 233        int len,i,order,best_order,index;
 234
 235        list = eni_dev->free_list;
 236        len = eni_dev->free_len;
 237        if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE;
 238        if (*size > MID_MAX_BUF_SIZE) return NULL;
 239        for (order = 0; (1 << order) < *size; order++)
 240                ;
 241        DPRINTK("trying: %ld->%d\n",*size,order);
 242        best_order = 65; /* we don't have more than 2^64 of anything ... */
 243        index = 0; /* silence GCC */
 244        for (i = 0; i < len; i++)
 245                if (list[i].order == order) {
 246                        best_order = order;
 247                        index = i;
 248                        break;
 249                }
 250                else if (best_order > list[i].order && list[i].order > order) {
 251                                best_order = list[i].order;
 252                                index = i;
 253                        }
 254        if (best_order == 65) return NULL;
 255        start = list[index].start-eni_dev->base_diff;
 256        list[index] = list[--len];
 257        eni_dev->free_len = len;
 258        *size = 1 << order;
 259        eni_put_free(eni_dev,start+*size,(1 << best_order)-*size);
 260        DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start);
 261        memset_io(start,0,*size);       /* never leak data */
 262        /*dump_mem(eni_dev);*/
 263        return start;
 264}
 265
 266
 267static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start,
 268    unsigned long size)
 269{
 270        struct eni_free *list;
 271        int len,i,order;
 272
 273        start += eni_dev->base_diff;
 274        list = eni_dev->free_list;
 275        len = eni_dev->free_len;
 276        for (order = -1; size; order++) size >>= 1;
 277        DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order);
 278        for (i = 0; i < len; i++)
 279                if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) &&
 280                    list[i].order == order) {
 281                        DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i,
 282                            list[i].start,start,1 << order,list[i].order,order);
 283                        list[i] = list[--len];
 284                        start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order));
 285                        order++;
 286                        i = -1;
 287                        continue;
 288                }
 289        if (len >= eni_dev->free_list_size) {
 290                printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start,
 291                    order);
 292                return;
 293        }
 294        list[len].start = start;
 295        list[len].order = order;
 296        eni_dev->free_len = len+1;
 297        /*dump_mem(eni_dev);*/
 298}
 299
 300
 301/*----------------------------------- RX ------------------------------------*/
 302
 303
 304#define ENI_VCC_NOS ((struct atm_vcc *) 1)
 305
 306
 307static void rx_ident_err(struct atm_vcc *vcc)
 308{
 309        struct atm_dev *dev;
 310        struct eni_dev *eni_dev;
 311        struct eni_vcc *eni_vcc;
 312
 313        dev = vcc->dev;
 314        eni_dev = ENI_DEV(dev);
 315        /* immediately halt adapter */
 316        eni_out(eni_in(MID_MC_S) &
 317            ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S);
 318        /* dump useful information */
 319        eni_vcc = ENI_VCC(vcc);
 320        printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident "
 321            "mismatch\n",dev->number);
 322        printk(KERN_ALERT "  VCI %d, rxing %d, words %ld\n",vcc->vci,
 323            eni_vcc->rxing,eni_vcc->words);
 324        printk(KERN_ALERT "  host descr 0x%lx, rx pos 0x%lx, descr value "
 325            "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos,
 326            (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4));
 327        printk(KERN_ALERT "  last %p, servicing %d\n",eni_vcc->last,
 328            eni_vcc->servicing);
 329        EVENT("---dump ends here---\n",0,0);
 330        printk(KERN_NOTICE "---recent events---\n");
 331        event_dump();
 332        ENI_DEV(dev)->fast = NULL; /* really stop it */
 333        ENI_DEV(dev)->slow = NULL;
 334        skb_queue_head_init(&ENI_DEV(dev)->rx_queue);
 335}
 336
 337
 338static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb,
 339    unsigned long skip,unsigned long size,unsigned long eff)
 340{
 341        struct eni_dev *eni_dev;
 342        struct eni_vcc *eni_vcc;
 343        u32 dma_rd,dma_wr;
 344        u32 dma[RX_DMA_BUF*2];
 345        dma_addr_t paddr;
 346        unsigned long here;
 347        int i,j;
 348
 349        eni_dev = ENI_DEV(vcc->dev);
 350        eni_vcc = ENI_VCC(vcc);
 351        paddr = 0; /* GCC, shut up */
 352        if (skb) {
 353                paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
 354                                       DMA_FROM_DEVICE);
 355                if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
 356                        goto dma_map_error;
 357                ENI_PRV_PADDR(skb) = paddr;
 358                if (paddr & 3)
 359                        printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has "
 360                            "mis-aligned RX data (0x%lx)\n",vcc->dev->number,
 361                            vcc->vci,(unsigned long) paddr);
 362                ENI_PRV_SIZE(skb) = size+skip;
 363                    /* PDU plus descriptor */
 364                ATM_SKB(skb)->vcc = vcc;
 365        }
 366        j = 0;
 367        if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */
 368                here = (eni_vcc->descr+skip) & (eni_vcc->words-1);
 369                dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci
 370                    << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 371                dma[j++] = 0;
 372        }
 373        here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1);
 374        if (!eff) size += skip;
 375        else {
 376                unsigned long words;
 377
 378                if (!size) {
 379                        DPRINTK("strange things happen ...\n");
 380                        EVENT("strange things happen ... (skip=%ld,eff=%ld)\n",
 381                            size,eff);
 382                }
 383                words = eff;
 384                if (paddr & 15) {
 385                        unsigned long init;
 386
 387                        init = 4-((paddr & 15) >> 2);
 388                        if (init > words) init = words;
 389                        dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 390                            (vcc->vci << MID_DMA_VCI_SHIFT);
 391                        dma[j++] = paddr;
 392                        paddr += init << 2;
 393                        words -= init;
 394                }
 395#ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */
 396                if (words & ~15) {
 397                        dma[j++] = MID_DT_16W | ((words >> 4) <<
 398                            MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 399                            MID_DMA_VCI_SHIFT);
 400                        dma[j++] = paddr;
 401                        paddr += (words & ~15) << 2;
 402                        words &= 15;
 403                }
 404#endif
 405#ifdef CONFIG_ATM_ENI_BURST_RX_8W  /* works only with *some* PCI chipsets ... */
 406                if (words & ~7) {
 407                        dma[j++] = MID_DT_8W | ((words >> 3) <<
 408                            MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 409                            MID_DMA_VCI_SHIFT);
 410                        dma[j++] = paddr;
 411                        paddr += (words & ~7) << 2;
 412                        words &= 7;
 413                }
 414#endif
 415#ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */
 416                if (words & ~3) {
 417                        dma[j++] = MID_DT_4W | ((words >> 2) <<
 418                            MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 419                            MID_DMA_VCI_SHIFT);
 420                        dma[j++] = paddr;
 421                        paddr += (words & ~3) << 2;
 422                        words &= 3;
 423                }
 424#endif
 425#ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */
 426                if (words & ~1) {
 427                        dma[j++] = MID_DT_2W | ((words >> 1) <<
 428                            MID_DMA_COUNT_SHIFT) | (vcc->vci <<
 429                            MID_DMA_VCI_SHIFT);
 430                        dma[j++] = paddr;
 431                        paddr += (words & ~1) << 2;
 432                        words &= 1;
 433                }
 434#endif
 435                if (words) {
 436                        dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT)
 437                            | (vcc->vci << MID_DMA_VCI_SHIFT);
 438                        dma[j++] = paddr;
 439                }
 440        }
 441        if (size != eff) {
 442                dma[j++] = (here << MID_DMA_COUNT_SHIFT) |
 443                    (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK;
 444                dma[j++] = 0;
 445        }
 446        if (!j || j > 2*RX_DMA_BUF) {
 447                printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n");
 448                goto trouble;
 449        }
 450        dma[j-2] |= MID_DMA_END;
 451        j = j >> 1;
 452        dma_wr = eni_in(MID_DMA_WR_RX);
 453        dma_rd = eni_in(MID_DMA_RD_RX);
 454        /*
 455         * Can I move the dma_wr pointer by 2j+1 positions without overwriting
 456         * data that hasn't been read (position of dma_rd) yet ?
 457         */
 458        if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */
 459                printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n",
 460                    vcc->dev->number);
 461                goto trouble;
 462        }
 463        for (i = 0; i < j; i++) {
 464                writel(dma[i*2],eni_dev->rx_dma+dma_wr*8);
 465                writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4);
 466                dma_wr = (dma_wr+1) & (NR_DMA_RX-1);
 467        }
 468        if (skb) {
 469                ENI_PRV_POS(skb) = eni_vcc->descr+size+1;
 470                skb_queue_tail(&eni_dev->rx_queue,skb);
 471                eni_vcc->last = skb;
 472                rx_enqueued++;
 473        }
 474        eni_vcc->descr = here;
 475        eni_out(dma_wr,MID_DMA_WR_RX);
 476        return 0;
 477
 478trouble:
 479        if (paddr)
 480                dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len,
 481                                 DMA_FROM_DEVICE);
 482dma_map_error:
 483        if (skb) dev_kfree_skb_irq(skb);
 484        return -1;
 485}
 486
 487
 488static void discard(struct atm_vcc *vcc,unsigned long size)
 489{
 490        struct eni_vcc *eni_vcc;
 491
 492        eni_vcc = ENI_VCC(vcc);
 493        EVENT("discard (size=%ld)\n",size,0);
 494        while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0);
 495            /* could do a full fallback, but that might be more expensive */
 496        if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1;
 497        else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1);
 498}
 499
 500
 501/*
 502 * TODO: should check whether direct copies (without DMA setup, dequeuing on
 503 * interrupt, etc.) aren't much faster for AAL0
 504 */
 505
 506static int rx_aal0(struct atm_vcc *vcc)
 507{
 508        struct eni_vcc *eni_vcc;
 509        unsigned long descr;
 510        unsigned long length;
 511        struct sk_buff *skb;
 512
 513        DPRINTK(">rx_aal0\n");
 514        eni_vcc = ENI_VCC(vcc);
 515        descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 516        if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 517                rx_ident_err(vcc);
 518                return 1;
 519        }
 520        if (descr & MID_RED_T) {
 521                DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 522                    vcc->dev->number);
 523                length = 0;
 524                atomic_inc(&vcc->stats->rx_err);
 525        }
 526        else {
 527                length = ATM_CELL_SIZE-1; /* no HEC */
 528        }
 529        skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL;
 530        if (!skb) {
 531                discard(vcc,length >> 2);
 532                return 0;
 533        }
 534        skb_put(skb,length);
 535        skb->tstamp = eni_vcc->timestamp;
 536        DPRINTK("got len %ld\n",length);
 537        if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1;
 538        eni_vcc->rxing++;
 539        return 0;
 540}
 541
 542
 543static int rx_aal5(struct atm_vcc *vcc)
 544{
 545        struct eni_vcc *eni_vcc;
 546        unsigned long descr;
 547        unsigned long size,eff,length;
 548        struct sk_buff *skb;
 549
 550        EVENT("rx_aal5\n",0,0);
 551        DPRINTK(">rx_aal5\n");
 552        eni_vcc = ENI_VCC(vcc);
 553        descr = readl(eni_vcc->recv+eni_vcc->descr*4);
 554        if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) {
 555                rx_ident_err(vcc);
 556                return 1;
 557        }
 558        if (descr & (MID_RED_T | MID_RED_CRC_ERR)) {
 559                if (descr & MID_RED_T) {
 560                        EVENT("empty cell (descr=0x%lx)\n",descr,0);
 561                        DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n",
 562                            vcc->dev->number);
 563                        size = 0;
 564                }
 565                else {
 566                        static unsigned long silence = 0;
 567
 568                        if (time_after(jiffies, silence) || silence == 0) {
 569                                printk(KERN_WARNING DEV_LABEL "(itf %d): "
 570                                    "discarding PDU(s) with CRC error\n",
 571                                    vcc->dev->number);
 572                                silence = (jiffies+2*HZ)|1;
 573                        }
 574                        size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 575                        EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr,
 576                            size);
 577                }
 578                eff = length = 0;
 579                atomic_inc(&vcc->stats->rx_err);
 580        }
 581        else {
 582                size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2);
 583                DPRINTK("size=%ld\n",size);
 584                length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) &
 585                    (eni_vcc->words-1)))*4) & 0xffff;
 586                                /* -trailer(2)+header(1) */
 587                if (length && length <= (size << 2)-8 && length <=
 588                  ATM_MAX_AAL5_PDU) eff = (length+3) >> 2;
 589                else {                           /* ^ trailer length (8) */
 590                        EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr,
 591                            length);
 592                        printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU "
 593                            "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n",
 594                            vcc->dev->number,vcc->vci,length,size << 2,descr);
 595                        length = eff = 0;
 596                        atomic_inc(&vcc->stats->rx_err);
 597                }
 598        }
 599        skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL;
 600        if (!skb) {
 601                discard(vcc,size);
 602                return 0;
 603        }
 604        skb_put(skb,length);
 605        DPRINTK("got len %ld\n",length);
 606        if (do_rx_dma(vcc,skb,1,size,eff)) return 1;
 607        eni_vcc->rxing++;
 608        return 0;
 609}
 610
 611
 612static inline int rx_vcc(struct atm_vcc *vcc)
 613{
 614        void __iomem *vci_dsc;
 615        unsigned long tmp;
 616        struct eni_vcc *eni_vcc;
 617
 618        eni_vcc = ENI_VCC(vcc);
 619        vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16;
 620        EVENT("rx_vcc(1)\n",0,0);
 621        while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >>
 622            MID_VCI_DESCR_SHIFT)) {
 623                EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n",
 624                    eni_vcc->descr,tmp);
 625                DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 626                    (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 627                    MID_VCI_DESCR_SHIFT));
 628                if (ENI_VCC(vcc)->rx(vcc)) return 1;
 629        }
 630        /* clear IN_SERVICE flag */
 631        writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc);
 632        /*
 633         * If new data has arrived between evaluating the while condition and
 634         * clearing IN_SERVICE, we wouldn't be notified until additional data
 635         * follows. So we have to loop again to be sure.
 636         */
 637        EVENT("rx_vcc(3)\n",0,0);
 638        while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR)
 639            >> MID_VCI_DESCR_SHIFT)) {
 640                EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n",
 641                    eni_vcc->descr,tmp);
 642                DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr,
 643                    (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >>
 644                    MID_VCI_DESCR_SHIFT));
 645                if (ENI_VCC(vcc)->rx(vcc)) return 1;
 646        }
 647        return 0;
 648}
 649
 650
 651static void poll_rx(struct atm_dev *dev)
 652{
 653        struct eni_dev *eni_dev;
 654        struct atm_vcc *curr;
 655
 656        eni_dev = ENI_DEV(dev);
 657        while ((curr = eni_dev->fast)) {
 658                EVENT("poll_rx.fast\n",0,0);
 659                if (rx_vcc(curr)) return;
 660                eni_dev->fast = ENI_VCC(curr)->next;
 661                ENI_VCC(curr)->next = ENI_VCC_NOS;
 662                barrier();
 663                ENI_VCC(curr)->servicing--;
 664        }
 665        while ((curr = eni_dev->slow)) {
 666                EVENT("poll_rx.slow\n",0,0);
 667                if (rx_vcc(curr)) return;
 668                eni_dev->slow = ENI_VCC(curr)->next;
 669                ENI_VCC(curr)->next = ENI_VCC_NOS;
 670                barrier();
 671                ENI_VCC(curr)->servicing--;
 672        }
 673}
 674
 675
 676static void get_service(struct atm_dev *dev)
 677{
 678        struct eni_dev *eni_dev;
 679        struct atm_vcc *vcc;
 680        unsigned long vci;
 681
 682        DPRINTK(">get_service\n");
 683        eni_dev = ENI_DEV(dev);
 684        while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) {
 685                vci = readl(eni_dev->service+eni_dev->serv_read*4);
 686                eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1);
 687                vcc = eni_dev->rx_map[vci & 1023];
 688                if (!vcc) {
 689                        printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not "
 690                            "found\n",dev->number,vci);
 691                        continue; /* nasty but we try to go on anyway */
 692                        /* @@@ nope, doesn't work */
 693                }
 694                EVENT("getting from service\n",0,0);
 695                if (ENI_VCC(vcc)->next != ENI_VCC_NOS) {
 696                        EVENT("double service\n",0,0);
 697                        DPRINTK("Grr, servicing VCC %ld twice\n",vci);
 698                        continue;
 699                }
 700                ENI_VCC(vcc)->timestamp = ktime_get_real();
 701                ENI_VCC(vcc)->next = NULL;
 702                if (vcc->qos.rxtp.traffic_class == ATM_CBR) {
 703                        if (eni_dev->fast)
 704                                ENI_VCC(eni_dev->last_fast)->next = vcc;
 705                        else eni_dev->fast = vcc;
 706                        eni_dev->last_fast = vcc;
 707                }
 708                else {
 709                        if (eni_dev->slow)
 710                                ENI_VCC(eni_dev->last_slow)->next = vcc;
 711                        else eni_dev->slow = vcc;
 712                        eni_dev->last_slow = vcc;
 713                }
 714                putting++;
 715                ENI_VCC(vcc)->servicing++;
 716        }
 717}
 718
 719
 720static void dequeue_rx(struct atm_dev *dev)
 721{
 722        struct eni_dev *eni_dev;
 723        struct eni_vcc *eni_vcc;
 724        struct atm_vcc *vcc;
 725        struct sk_buff *skb;
 726        void __iomem *vci_dsc;
 727        int first;
 728
 729        eni_dev = ENI_DEV(dev);
 730        first = 1;
 731        while (1) {
 732                skb = skb_dequeue(&eni_dev->rx_queue);
 733                if (!skb) {
 734                        if (first) {
 735                                DPRINTK(DEV_LABEL "(itf %d): RX but not "
 736                                    "rxing\n",dev->number);
 737                                EVENT("nothing to dequeue\n",0,0);
 738                        }
 739                        break;
 740                }
 741                EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb),
 742                    ENI_PRV_POS(skb));
 743                rx_dequeued++;
 744                vcc = ATM_SKB(skb)->vcc;
 745                eni_vcc = ENI_VCC(vcc);
 746                first = 0;
 747                vci_dsc = eni_dev->vci+vcc->vci*16;
 748                if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb),
 749                    (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT,
 750                    eni_vcc->words)) {
 751                        EVENT("requeuing\n",0,0);
 752                        skb_queue_head(&eni_dev->rx_queue,skb);
 753                        break;
 754                }
 755                eni_vcc->rxing--;
 756                eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1);
 757                dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
 758                                 DMA_TO_DEVICE);
 759                if (!skb->len) dev_kfree_skb_irq(skb);
 760                else {
 761                        EVENT("pushing (len=%ld)\n",skb->len,0);
 762                        if (vcc->qos.aal == ATM_AAL0)
 763                                *(unsigned long *) skb->data =
 764                                    ntohl(*(unsigned long *) skb->data);
 765                        memset(skb->cb,0,sizeof(struct eni_skb_prv));
 766                        vcc->push(vcc,skb);
 767                        pushed++;
 768                }
 769                atomic_inc(&vcc->stats->rx);
 770        }
 771        wake_up(&eni_dev->rx_wait);
 772}
 773
 774
 775static int open_rx_first(struct atm_vcc *vcc)
 776{
 777        struct eni_dev *eni_dev;
 778        struct eni_vcc *eni_vcc;
 779        unsigned long size;
 780
 781        DPRINTK("open_rx_first\n");
 782        eni_dev = ENI_DEV(vcc->dev);
 783        eni_vcc = ENI_VCC(vcc);
 784        eni_vcc->rx = NULL;
 785        if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0;
 786        size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100;
 787        if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <=
 788            MID_MAX_BUF_SIZE)
 789                size = MID_MAX_BUF_SIZE;
 790        eni_vcc->recv = eni_alloc_mem(eni_dev,&size);
 791        DPRINTK("rx at 0x%lx\n",eni_vcc->recv);
 792        eni_vcc->words = size >> 2;
 793        if (!eni_vcc->recv) return -ENOBUFS;
 794        eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0;
 795        eni_vcc->descr = 0;
 796        eni_vcc->rx_pos = 0;
 797        eni_vcc->rxing = 0;
 798        eni_vcc->servicing = 0;
 799        eni_vcc->next = ENI_VCC_NOS;
 800        return 0;
 801}
 802
 803
 804static int open_rx_second(struct atm_vcc *vcc)
 805{
 806        void __iomem *here;
 807        struct eni_dev *eni_dev;
 808        struct eni_vcc *eni_vcc;
 809        unsigned long size;
 810        int order;
 811
 812        DPRINTK("open_rx_second\n");
 813        eni_dev = ENI_DEV(vcc->dev);
 814        eni_vcc = ENI_VCC(vcc);
 815        if (!eni_vcc->rx) return 0;
 816        /* set up VCI descriptor */
 817        here = eni_dev->vci+vcc->vci*16;
 818        DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4);
 819        size = eni_vcc->words >> 8;
 820        for (order = -1; size; order++) size >>= 1;
 821        writel(0,here+4); /* descr, read = 0 */
 822        writel(0,here+8); /* write, state, count = 0 */
 823        if (eni_dev->rx_map[vcc->vci])
 824                printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already "
 825                    "in use\n",vcc->dev->number,vcc->vci);
 826        eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */
 827        writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) <<
 828            MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE |
 829            (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) <<
 830            MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here);
 831        return 0;
 832}
 833
 834
 835static void close_rx(struct atm_vcc *vcc)
 836{
 837        DECLARE_WAITQUEUE(wait,current);
 838        void __iomem *here;
 839        struct eni_dev *eni_dev;
 840        struct eni_vcc *eni_vcc;
 841
 842        eni_vcc = ENI_VCC(vcc);
 843        if (!eni_vcc->rx) return;
 844        eni_dev = ENI_DEV(vcc->dev);
 845        if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) {
 846                here = eni_dev->vci+vcc->vci*16;
 847                /* block receiver */
 848                writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH <<
 849                    MID_VCI_MODE_SHIFT),here);
 850                /* wait for receiver to become idle */
 851                udelay(27);
 852                /* discard pending cell */
 853                writel(readl(here) & ~MID_VCI_IN_SERVICE,here);
 854                /* don't accept any new ones */
 855                eni_dev->rx_map[vcc->vci] = NULL;
 856                /* wait for RX queue to drain */
 857                DPRINTK("eni_close: waiting for RX ...\n");
 858                EVENT("RX closing\n",0,0);
 859                add_wait_queue(&eni_dev->rx_wait,&wait);
 860                set_current_state(TASK_UNINTERRUPTIBLE);
 861                barrier();
 862                for (;;) {
 863                        /* transition service->rx: rxing++, servicing-- */
 864                        if (!eni_vcc->servicing) {
 865                                barrier();
 866                                if (!eni_vcc->rxing) break;
 867                        }
 868                        EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing,
 869                            eni_vcc->servicing);
 870                        printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing,
 871                            eni_vcc->rxing);
 872                        schedule();
 873                        set_current_state(TASK_UNINTERRUPTIBLE);
 874                }
 875                for (;;) {
 876                        int at_end;
 877                        u32 tmp;
 878
 879                        tasklet_disable(&eni_dev->task);
 880                        tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ;
 881                        at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT;
 882                        tasklet_enable(&eni_dev->task);
 883                        if (at_end) break;
 884                        EVENT("drain discard (host 0x%lx, nic 0x%lx)\n",
 885                            eni_vcc->rx_pos,tmp);
 886                        printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n",
 887                            eni_vcc->rx_pos,tmp);
 888                        schedule();
 889                        set_current_state(TASK_UNINTERRUPTIBLE);
 890                }
 891                set_current_state(TASK_RUNNING);
 892                remove_wait_queue(&eni_dev->rx_wait,&wait);
 893        }
 894        eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2);
 895        eni_vcc->rx = NULL;
 896}
 897
 898
 899static int start_rx(struct atm_dev *dev)
 900{
 901        struct eni_dev *eni_dev;
 902
 903        eni_dev = ENI_DEV(dev);
 904        eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL);
 905        if (!eni_dev->rx_map) {
 906                printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
 907                    dev->number);
 908                free_page((unsigned long) eni_dev->free_list);
 909                return -ENOMEM;
 910        }
 911        eni_dev->rx_mult = DEFAULT_RX_MULT;
 912        eni_dev->fast = eni_dev->last_fast = NULL;
 913        eni_dev->slow = eni_dev->last_slow = NULL;
 914        init_waitqueue_head(&eni_dev->rx_wait);
 915        skb_queue_head_init(&eni_dev->rx_queue);
 916        eni_dev->serv_read = eni_in(MID_SERV_WRITE);
 917        eni_out(0,MID_DMA_WR_RX);
 918        return 0;
 919}
 920
 921
 922/*----------------------------------- TX ------------------------------------*/
 923
 924
 925enum enq_res { enq_ok,enq_next,enq_jam };
 926
 927
 928static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr,
 929    u32 size)
 930{
 931        u32 init,words;
 932
 933        DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size);
 934        EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size);
 935#if 0 /* don't complain anymore */
 936        if (paddr & 3)
 937                printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr);
 938        if (size & 3)
 939                printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size);
 940#endif
 941        if (paddr & 3) {
 942                init = 4-(paddr & 3);
 943                if (init > size || size < 7) init = size;
 944                DPRINTK("put_dma: %lx DMA: %d/%d bytes\n",
 945                    (unsigned long) paddr,init,size);
 946                dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) |
 947                    (chan << MID_DMA_CHAN_SHIFT);
 948                dma[(*j)++] = paddr;
 949                paddr += init;
 950                size -= init;
 951        }
 952        words = size >> 2;
 953        size &= 3;
 954        if (words && (paddr & 31)) {
 955                init = 8-((paddr & 31) >> 2);
 956                if (init > words) init = words;
 957                DPRINTK("put_dma: %lx DMA: %d/%d words\n",
 958                    (unsigned long) paddr,init,words);
 959                dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) |
 960                    (chan << MID_DMA_CHAN_SHIFT);
 961                dma[(*j)++] = paddr;
 962                paddr += init << 2;
 963                words -= init;
 964        }
 965#ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */
 966        if (words & ~15) {
 967                DPRINTK("put_dma: %lx DMA: %d*16/%d words\n",
 968                    (unsigned long) paddr,words >> 4,words);
 969                dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT)
 970                    | (chan << MID_DMA_CHAN_SHIFT);
 971                dma[(*j)++] = paddr;
 972                paddr += (words & ~15) << 2;
 973                words &= 15;
 974        }
 975#endif
 976#ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */
 977        if (words & ~7) {
 978                DPRINTK("put_dma: %lx DMA: %d*8/%d words\n",
 979                    (unsigned long) paddr,words >> 3,words);
 980                dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT)
 981                    | (chan << MID_DMA_CHAN_SHIFT);
 982                dma[(*j)++] = paddr;
 983                paddr += (words & ~7) << 2;
 984                words &= 7;
 985        }
 986#endif
 987#ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */
 988        if (words & ~3) {
 989                DPRINTK("put_dma: %lx DMA: %d*4/%d words\n",
 990                    (unsigned long) paddr,words >> 2,words);
 991                dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT)
 992                    | (chan << MID_DMA_CHAN_SHIFT);
 993                dma[(*j)++] = paddr;
 994                paddr += (words & ~3) << 2;
 995                words &= 3;
 996        }
 997#endif
 998#ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */
 999        if (words & ~1) {
1000                DPRINTK("put_dma: %lx DMA: %d*2/%d words\n",
1001                    (unsigned long) paddr,words >> 1,words);
1002                dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT)
1003                    | (chan << MID_DMA_CHAN_SHIFT);
1004                dma[(*j)++] = paddr;
1005                paddr += (words & ~1) << 2;
1006                words &= 1;
1007        }
1008#endif
1009        if (words) {
1010                DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr,
1011                    words);
1012                dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) |
1013                    (chan << MID_DMA_CHAN_SHIFT);
1014                dma[(*j)++] = paddr;
1015                paddr += words << 2;
1016        }
1017        if (size) {
1018                DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr,
1019                    size);
1020                dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) |
1021                    (chan << MID_DMA_CHAN_SHIFT);
1022                dma[(*j)++] = paddr;
1023        }
1024}
1025
1026
1027static enum enq_res do_tx(struct sk_buff *skb)
1028{
1029        struct atm_vcc *vcc;
1030        struct eni_dev *eni_dev;
1031        struct eni_vcc *eni_vcc;
1032        struct eni_tx *tx;
1033        dma_addr_t paddr;
1034        u32 dma_rd,dma_wr;
1035        u32 size; /* in words */
1036        int aal5,dma_size,i,j;
1037        unsigned char skb_data3;
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        skb_data3 = skb->data[3];
1113        paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
1114                               DMA_TO_DEVICE);
1115        ENI_PRV_PADDR(skb) = paddr;
1116        /* prepare DMA queue entries */
1117        j = 0;
1118        eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) <<
1119             MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1120             MID_DT_JK;
1121        j++;
1122        if (!skb_shinfo(skb)->nr_frags)
1123                if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len);
1124                else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4);
1125        else {
1126DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */
1127                for (i = -1; i < skb_shinfo(skb)->nr_frags; i++)
1128                        if (i == -1)
1129                                put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1130                                    skb->data,
1131                                    skb_headlen(skb));
1132                        else
1133                                put_dma(tx->index,eni_dev->dma,&j,(unsigned long)
1134                                    skb_frag_page(&skb_shinfo(skb)->frags[i]) +
1135                                        skb_frag_off(&skb_shinfo(skb)->frags[i]),
1136                                    skb_frag_size(&skb_shinfo(skb)->frags[i]));
1137        }
1138        if (skb->len & 3) {
1139                put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma,
1140                        4 - (skb->len & 3));
1141        }
1142        /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */
1143        eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) <<
1144             MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) |
1145             MID_DMA_END | MID_DT_JK;
1146        j++;
1147        DPRINTK("DMA at end: %d\n",j);
1148        /* store frame */
1149        writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) |
1150            (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) |
1151            (tx->resolution << MID_SEG_RATE_SHIFT) |
1152            (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4);
1153/*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/
1154        writel((vcc->vci << MID_SEG_VCI_SHIFT) |
1155            (aal5 ? 0 : (skb_data3 & 0xf)) |
1156            (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0),
1157            tx->send+((tx->tx_pos+1) & (tx->words-1))*4);
1158        DPRINTK("size: %d, len:%d\n",size,skb->len);
1159        if (aal5)
1160                writel(skb->len,tx->send+
1161                    ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4);
1162        j = j >> 1;
1163        for (i = 0; i < j; i++) {
1164                writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8);
1165                writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4);
1166                dma_wr = (dma_wr+1) & (NR_DMA_TX-1);
1167        }
1168        ENI_PRV_POS(skb) = tx->tx_pos;
1169        ENI_PRV_SIZE(skb) = size;
1170        ENI_VCC(vcc)->txing += size;
1171        tx->tx_pos = (tx->tx_pos+size) & (tx->words-1);
1172        DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos);
1173        eni_out(dma_wr,MID_DMA_WR_TX);
1174        skb_queue_tail(&eni_dev->tx_queue,skb);
1175        queued++;
1176        return enq_ok;
1177}
1178
1179
1180static void poll_tx(struct atm_dev *dev)
1181{
1182        struct eni_tx *tx;
1183        struct sk_buff *skb;
1184        enum enq_res res;
1185        int i;
1186
1187        DPRINTK(">poll_tx\n");
1188        for (i = NR_CHAN-1; i >= 0; i--) {
1189                tx = &ENI_DEV(dev)->tx[i];
1190                if (tx->send)
1191                        while ((skb = skb_dequeue(&tx->backlog))) {
1192                                res = do_tx(skb);
1193                                if (res == enq_ok) continue;
1194                                DPRINTK("re-queuing TX PDU\n");
1195                                skb_queue_head(&tx->backlog,skb);
1196                                requeued++;
1197                                if (res == enq_jam) return;
1198                                break;
1199                        }
1200        }
1201}
1202
1203
1204static void dequeue_tx(struct atm_dev *dev)
1205{
1206        struct eni_dev *eni_dev;
1207        struct atm_vcc *vcc;
1208        struct sk_buff *skb;
1209        struct eni_tx *tx;
1210
1211        NULLCHECK(dev);
1212        eni_dev = ENI_DEV(dev);
1213        NULLCHECK(eni_dev);
1214        while ((skb = skb_dequeue(&eni_dev->tx_queue))) {
1215                vcc = ATM_SKB(skb)->vcc;
1216                NULLCHECK(vcc);
1217                tx = ENI_VCC(vcc)->tx;
1218                NULLCHECK(ENI_VCC(vcc)->tx);
1219                DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb),
1220                    (unsigned) eni_in(MID_TX_DESCRSTART(tx->index)));
1221                if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) ==
1222                    eni_in(MID_TX_DESCRSTART(tx->index))) {
1223                        skb_queue_head(&eni_dev->tx_queue,skb);
1224                        break;
1225                }
1226                ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb);
1227                dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len,
1228                                 DMA_TO_DEVICE);
1229                if (vcc->pop) vcc->pop(vcc,skb);
1230                else dev_kfree_skb_irq(skb);
1231                atomic_inc(&vcc->stats->tx);
1232                wake_up(&eni_dev->tx_wait);
1233                dma_complete++;
1234        }
1235}
1236
1237
1238static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr)
1239{
1240        int i;
1241
1242        for (i = !ubr; i < NR_CHAN; i++)
1243                if (!eni_dev->tx[i].send) return eni_dev->tx+i;
1244        return NULL;
1245}
1246
1247
1248static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre,
1249    int *res,int unlimited)
1250{
1251        static const int pre_div[] = { 4,16,128,2048 };
1252            /* 2^(((x+2)^2-(x+2))/2+1) */
1253
1254        if (unlimited) *pre = *res = 0;
1255        else {
1256                if (*pcr > 0) {
1257                        int div;
1258
1259                        for (*pre = 0; *pre < 3; (*pre)++)
1260                                if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break;
1261                        div = pre_div[*pre]**pcr;
1262                        DPRINTK("min div %d\n",div);
1263                        *res = TS_CLOCK/div-1;
1264                }
1265                else {
1266                        int div;
1267
1268                        if (!*pcr) *pcr = eni_dev->tx_bw+reserved;
1269                        for (*pre = 3; *pre >= 0; (*pre)--)
1270                                if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break;
1271                        if (*pre < 3) (*pre)++; /* else fail later */
1272                        div = pre_div[*pre]*-*pcr;
1273                        DPRINTK("max div %d\n",div);
1274                        *res = DIV_ROUND_UP(TS_CLOCK, div)-1;
1275                }
1276                if (*res < 0) *res = 0;
1277                if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE;
1278        }
1279        *pcr = TS_CLOCK/pre_div[*pre]/(*res+1);
1280        DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res);
1281        return 0;
1282}
1283
1284
1285static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp,
1286    int set_rsv,int set_shp)
1287{
1288        struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1289        struct eni_vcc *eni_vcc = ENI_VCC(vcc);
1290        struct eni_tx *tx;
1291        unsigned long size;
1292        void __iomem *mem;
1293        int rate,ubr,unlimited,new_tx;
1294        int pre,res,order;
1295        int error;
1296
1297        rate = atm_pcr_goal(txtp);
1298        ubr = txtp->traffic_class == ATM_UBR;
1299        unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR ||
1300            rate >= ATM_OC3_PCR);
1301        if (!unlimited) {
1302                size = txtp->max_sdu*eni_dev->tx_mult/100;
1303                if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <=
1304                    MID_MAX_BUF_SIZE)
1305                        size = MID_MAX_BUF_SIZE;
1306        }
1307        else {
1308                if (eni_dev->ubr) {
1309                        eni_vcc->tx = eni_dev->ubr;
1310                        txtp->pcr = ATM_OC3_PCR;
1311                        return 0;
1312                }
1313                size = UBR_BUFFER;
1314        }
1315        new_tx = !eni_vcc->tx;
1316        mem = NULL; /* for gcc */
1317        if (!new_tx) tx = eni_vcc->tx;
1318        else {
1319                mem = eni_alloc_mem(eni_dev,&size);
1320                if (!mem) return -ENOBUFS;
1321                tx = alloc_tx(eni_dev,unlimited);
1322                if (!tx) {
1323                        eni_free_mem(eni_dev,mem,size);
1324                        return -EBUSY;
1325                }
1326                DPRINTK("got chan %d\n",tx->index);
1327                tx->reserved = tx->shaping = 0;
1328                tx->send = mem;
1329                tx->words = size >> 2;
1330                skb_queue_head_init(&tx->backlog);
1331                for (order = 0; size > (1 << (order+10)); order++);
1332                eni_out((order << MID_SIZE_SHIFT) |
1333                    ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)),
1334                    MID_TX_PLACE(tx->index));
1335                tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) &
1336                    MID_DESCR_START;
1337        }
1338        error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited);
1339        if (!error  && txtp->min_pcr > rate) error = -EINVAL;
1340        if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR &&
1341            txtp->max_pcr < rate) error = -EINVAL;
1342        if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved)
1343                error = -EINVAL;
1344        if (!error && set_rsv && !set_shp && rate < tx->shaping)
1345                error = -EINVAL;
1346        if (!error && !set_rsv && rate > tx->reserved && !ubr)
1347                error = -EINVAL;
1348        if (error) {
1349                if (new_tx) {
1350                        tx->send = NULL;
1351                        eni_free_mem(eni_dev,mem,size);
1352                }
1353                return error;
1354        }
1355        txtp->pcr = rate;
1356        if (set_rsv && !ubr) {
1357                eni_dev->tx_bw += tx->reserved;
1358                tx->reserved = rate;
1359                eni_dev->tx_bw -= rate;
1360        }
1361        if (set_shp || (unlimited && new_tx)) {
1362                if (unlimited && new_tx) eni_dev->ubr = tx;
1363                tx->prescaler = pre;
1364                tx->resolution = res;
1365                tx->shaping = rate;
1366        }
1367        if (set_shp) eni_vcc->tx = tx;
1368        DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping);
1369        return 0;
1370}
1371
1372
1373static int open_tx_first(struct atm_vcc *vcc)
1374{
1375        ENI_VCC(vcc)->tx = NULL;
1376        if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0;
1377        ENI_VCC(vcc)->txing = 0;
1378        return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1);
1379}
1380
1381
1382static int open_tx_second(struct atm_vcc *vcc)
1383{
1384        return 0; /* nothing to do */
1385}
1386
1387
1388static void close_tx(struct atm_vcc *vcc)
1389{
1390        DECLARE_WAITQUEUE(wait,current);
1391        struct eni_dev *eni_dev;
1392        struct eni_vcc *eni_vcc;
1393
1394        eni_vcc = ENI_VCC(vcc);
1395        if (!eni_vcc->tx) return;
1396        eni_dev = ENI_DEV(vcc->dev);
1397        /* wait for TX queue to drain */
1398        DPRINTK("eni_close: waiting for TX ...\n");
1399        add_wait_queue(&eni_dev->tx_wait,&wait);
1400        set_current_state(TASK_UNINTERRUPTIBLE);
1401        for (;;) {
1402                int txing;
1403
1404                tasklet_disable(&eni_dev->task);
1405                txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing;
1406                tasklet_enable(&eni_dev->task);
1407                if (!txing) break;
1408                DPRINTK("%d TX left\n",eni_vcc->txing);
1409                schedule();
1410                set_current_state(TASK_UNINTERRUPTIBLE);
1411        }
1412        set_current_state(TASK_RUNNING);
1413        remove_wait_queue(&eni_dev->tx_wait,&wait);
1414        if (eni_vcc->tx != eni_dev->ubr) {
1415                /*
1416                 * Looping a few times in here is probably far cheaper than
1417                 * keeping track of TX completions all the time, so let's poll
1418                 * a bit ...
1419                 */
1420                while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) !=
1421                    eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index)))
1422                        schedule();
1423                eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2);
1424                eni_vcc->tx->send = NULL;
1425                eni_dev->tx_bw += eni_vcc->tx->reserved;
1426        }
1427        eni_vcc->tx = NULL;
1428}
1429
1430
1431static int start_tx(struct atm_dev *dev)
1432{
1433        struct eni_dev *eni_dev;
1434        int i;
1435
1436        eni_dev = ENI_DEV(dev);
1437        eni_dev->lost = 0;
1438        eni_dev->tx_bw = ATM_OC3_PCR;
1439        eni_dev->tx_mult = DEFAULT_TX_MULT;
1440        init_waitqueue_head(&eni_dev->tx_wait);
1441        eni_dev->ubr = NULL;
1442        skb_queue_head_init(&eni_dev->tx_queue);
1443        eni_out(0,MID_DMA_WR_TX);
1444        for (i = 0; i < NR_CHAN; i++) {
1445                eni_dev->tx[i].send = NULL;
1446                eni_dev->tx[i].index = i;
1447        }
1448        return 0;
1449}
1450
1451
1452/*--------------------------------- common ----------------------------------*/
1453
1454
1455#if 0 /* may become useful again when tuning things */
1456
1457static void foo(void)
1458{
1459printk(KERN_INFO
1460  "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n"
1461  "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n",
1462  tx_complete,dma_complete,queued,requeued,submitted,backlogged,
1463  rx_enqueued,rx_dequeued,putting,pushed);
1464if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost);
1465}
1466
1467#endif
1468
1469
1470static void bug_int(struct atm_dev *dev,unsigned long reason)
1471{
1472        DPRINTK(">bug_int\n");
1473        if (reason & MID_DMA_ERR_ACK)
1474                printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1475                    "error\n",dev->number);
1476        if (reason & MID_TX_IDENT_MISM)
1477                printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident "
1478                    "mismatch\n",dev->number);
1479        if (reason & MID_TX_DMA_OVFL)
1480                printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA "
1481                    "overflow\n",dev->number);
1482        EVENT("---dump ends here---\n",0,0);
1483        printk(KERN_NOTICE "---recent events---\n");
1484        event_dump();
1485}
1486
1487
1488static irqreturn_t eni_int(int irq,void *dev_id)
1489{
1490        struct atm_dev *dev;
1491        struct eni_dev *eni_dev;
1492        u32 reason;
1493
1494        DPRINTK(">eni_int\n");
1495        dev = dev_id;
1496        eni_dev = ENI_DEV(dev);
1497        reason = eni_in(MID_ISA);
1498        DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason);
1499        /*
1500         * Must handle these two right now, because reading ISA doesn't clear
1501         * them, so they re-occur and we never make it to the tasklet. Since
1502         * they're rare, we don't mind the occasional invocation of eni_tasklet
1503         * with eni_dev->events == 0.
1504         */
1505        if (reason & MID_STAT_OVFL) {
1506                EVENT("stat overflow\n",0,0);
1507                eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH;
1508        }
1509        if (reason & MID_SUNI_INT) {
1510                EVENT("SUNI int\n",0,0);
1511                dev->phy->interrupt(dev);
1512#if 0
1513                foo();
1514#endif
1515        }
1516        spin_lock(&eni_dev->lock);
1517        eni_dev->events |= reason;
1518        spin_unlock(&eni_dev->lock);
1519        tasklet_schedule(&eni_dev->task);
1520        return IRQ_HANDLED;
1521}
1522
1523
1524static void eni_tasklet(unsigned long data)
1525{
1526        struct atm_dev *dev = (struct atm_dev *) data;
1527        struct eni_dev *eni_dev = ENI_DEV(dev);
1528        unsigned long flags;
1529        u32 events;
1530
1531        DPRINTK("eni_tasklet (dev %p)\n",dev);
1532        spin_lock_irqsave(&eni_dev->lock,flags);
1533        events = xchg(&eni_dev->events,0);
1534        spin_unlock_irqrestore(&eni_dev->lock,flags);
1535        if (events & MID_RX_DMA_COMPLETE) {
1536                EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0);
1537                dequeue_rx(dev);
1538                EVENT("dequeue_rx done, starting poll_rx\n",0,0);
1539                poll_rx(dev);
1540                EVENT("poll_rx done\n",0,0);
1541                /* poll_tx ? */
1542        }
1543        if (events & MID_SERVICE) {
1544                EVENT("INT: service, starting get_service\n",0,0);
1545                get_service(dev);
1546                EVENT("get_service done, starting poll_rx\n",0,0);
1547                poll_rx(dev);
1548                EVENT("poll_rx done\n",0,0);
1549        }
1550        if (events & MID_TX_DMA_COMPLETE) {
1551                EVENT("INT: TX DMA COMPLETE\n",0,0);
1552                dequeue_tx(dev);
1553        }
1554        if (events & MID_TX_COMPLETE) {
1555                EVENT("INT: TX COMPLETE\n",0,0);
1556                tx_complete++;
1557                wake_up(&eni_dev->tx_wait);
1558                /* poll_rx ? */
1559        }
1560        if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) {
1561                EVENT("bug interrupt\n",0,0);
1562                bug_int(dev,events);
1563        }
1564        poll_tx(dev);
1565}
1566
1567
1568/*--------------------------------- entries ---------------------------------*/
1569
1570
1571static char * const media_name[] = {
1572    "MMF", "SMF", "MMF", "03?", /*  0- 3 */
1573    "UTP", "05?", "06?", "07?", /*  4- 7 */
1574    "TAXI","09?", "10?", "11?", /*  8-11 */
1575    "12?", "13?", "14?", "15?", /* 12-15 */
1576    "MMF", "SMF", "18?", "19?", /* 16-19 */
1577    "UTP", "21?", "22?", "23?", /* 20-23 */
1578    "24?", "25?", "26?", "27?", /* 24-27 */
1579    "28?", "29?", "30?", "31?"  /* 28-31 */
1580};
1581
1582
1583#define SET_SEPROM \
1584  ({ if (!error && !pci_error) { \
1585    pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \
1586    udelay(10); /* 10 usecs */ \
1587  } })
1588#define GET_SEPROM \
1589  ({ if (!error && !pci_error) { \
1590    pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \
1591    udelay(10); /* 10 usecs */ \
1592  } })
1593
1594
1595static int get_esi_asic(struct atm_dev *dev)
1596{
1597        struct eni_dev *eni_dev;
1598        unsigned char tonga;
1599        int error,failed,pci_error;
1600        int address,i,j;
1601
1602        eni_dev = ENI_DEV(dev);
1603        error = pci_error = 0;
1604        tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK;
1605        SET_SEPROM;
1606        for (i = 0; i < ESI_LEN && !error && !pci_error; i++) {
1607                /* start operation */
1608                tonga |= SEPROM_DATA;
1609                SET_SEPROM;
1610                tonga |= SEPROM_CLK;
1611                SET_SEPROM;
1612                tonga &= ~SEPROM_DATA;
1613                SET_SEPROM;
1614                tonga &= ~SEPROM_CLK;
1615                SET_SEPROM;
1616                /* send address */
1617                address = ((i+SEPROM_ESI_BASE) << 1)+1;
1618                for (j = 7; j >= 0; j--) {
1619                        tonga = (address >> j) & 1 ? tonga | SEPROM_DATA :
1620                            tonga & ~SEPROM_DATA;
1621                        SET_SEPROM;
1622                        tonga |= SEPROM_CLK;
1623                        SET_SEPROM;
1624                        tonga &= ~SEPROM_CLK;
1625                        SET_SEPROM;
1626                }
1627                /* get ack */
1628                tonga |= SEPROM_DATA;
1629                SET_SEPROM;
1630                tonga |= SEPROM_CLK;
1631                SET_SEPROM;
1632                GET_SEPROM;
1633                failed = tonga & SEPROM_DATA;
1634                tonga &= ~SEPROM_CLK;
1635                SET_SEPROM;
1636                tonga |= SEPROM_DATA;
1637                SET_SEPROM;
1638                if (failed) error = -EIO;
1639                else {
1640                        dev->esi[i] = 0;
1641                        for (j = 7; j >= 0; j--) {
1642                                dev->esi[i] <<= 1;
1643                                tonga |= SEPROM_DATA;
1644                                SET_SEPROM;
1645                                tonga |= SEPROM_CLK;
1646                                SET_SEPROM;
1647                                GET_SEPROM;
1648                                if (tonga & SEPROM_DATA) dev->esi[i] |= 1;
1649                                tonga &= ~SEPROM_CLK;
1650                                SET_SEPROM;
1651                                tonga |= SEPROM_DATA;
1652                                SET_SEPROM;
1653                        }
1654                        /* get ack */
1655                        tonga |= SEPROM_DATA;
1656                        SET_SEPROM;
1657                        tonga |= SEPROM_CLK;
1658                        SET_SEPROM;
1659                        GET_SEPROM;
1660                        if (!(tonga & SEPROM_DATA)) error = -EIO;
1661                        tonga &= ~SEPROM_CLK;
1662                        SET_SEPROM;
1663                        tonga |= SEPROM_DATA;
1664                        SET_SEPROM;
1665                }
1666                /* stop operation */
1667                tonga &= ~SEPROM_DATA;
1668                SET_SEPROM;
1669                tonga |= SEPROM_CLK;
1670                SET_SEPROM;
1671                tonga |= SEPROM_DATA;
1672                SET_SEPROM;
1673        }
1674        if (pci_error) {
1675                printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI "
1676                    "(0x%02x)\n",dev->number,pci_error);
1677                error = -EIO;
1678        }
1679        return error;
1680}
1681
1682
1683#undef SET_SEPROM
1684#undef GET_SEPROM
1685
1686
1687static int get_esi_fpga(struct atm_dev *dev, void __iomem *base)
1688{
1689        void __iomem *mac_base;
1690        int i;
1691
1692        mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom);
1693        for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3));
1694        return 0;
1695}
1696
1697
1698static int eni_do_init(struct atm_dev *dev)
1699{
1700        struct midway_eprom __iomem *eprom;
1701        struct eni_dev *eni_dev;
1702        struct pci_dev *pci_dev;
1703        unsigned long real_base;
1704        void __iomem *base;
1705        int error,i,last;
1706
1707        DPRINTK(">eni_init\n");
1708        dev->ci_range.vpi_bits = 0;
1709        dev->ci_range.vci_bits = NR_VCI_LD;
1710        dev->link_rate = ATM_OC3_PCR;
1711        eni_dev = ENI_DEV(dev);
1712        pci_dev = eni_dev->pci_dev;
1713        real_base = pci_resource_start(pci_dev, 0);
1714        eni_dev->irq = pci_dev->irq;
1715        if ((error = pci_write_config_word(pci_dev,PCI_COMMAND,
1716            PCI_COMMAND_MEMORY |
1717            (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1718                printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory "
1719                    "(0x%02x)\n",dev->number,error);
1720                return -EIO;
1721        }
1722        printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,",
1723            dev->number,pci_dev->revision,real_base,eni_dev->irq);
1724        if (!(base = ioremap(real_base,MAP_MAX_SIZE))) {
1725                printk("\n");
1726                printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page "
1727                    "mapping\n",dev->number);
1728                return -ENOMEM;
1729        }
1730        eni_dev->ioaddr = base;
1731        eni_dev->base_diff = real_base - (unsigned long) base;
1732        /* id may not be present in ASIC Tonga boards - check this @@@ */
1733        if (!eni_dev->asic) {
1734                eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom));
1735                if (readl(&eprom->magic) != ENI155_MAGIC) {
1736                        printk("\n");
1737                        printk(KERN_ERR DEV_LABEL
1738                               "(itf %d): bad magic - expected 0x%x, got 0x%x\n",
1739                               dev->number, ENI155_MAGIC,
1740                               (unsigned)readl(&eprom->magic));
1741                        error = -EINVAL;
1742                        goto unmap;
1743                }
1744        }
1745        eni_dev->phy = base+PHY_BASE;
1746        eni_dev->reg = base+REG_BASE;
1747        eni_dev->ram = base+RAM_BASE;
1748        last = MAP_MAX_SIZE-RAM_BASE;
1749        for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) {
1750                writel(0x55555555,eni_dev->ram+i);
1751                if (readl(eni_dev->ram+i) != 0x55555555) last = i;
1752                else {
1753                        writel(0xAAAAAAAA,eni_dev->ram+i);
1754                        if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i;
1755                        else writel(i,eni_dev->ram+i);
1756                }
1757        }
1758        for (i = 0; i < last; i += RAM_INCREMENT)
1759                if (readl(eni_dev->ram+i) != i) break;
1760        eni_dev->mem = i;
1761        memset_io(eni_dev->ram,0,eni_dev->mem);
1762        /* TODO: should shrink allocation now */
1763        printk("mem=%dkB (",eni_dev->mem >> 10);
1764        /* TODO: check for non-SUNI, check for TAXI ? */
1765        if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) {
1766                printk(")\n");
1767                printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n",
1768                    dev->number,(unsigned) eni_in(MID_RES_ID_MCON));
1769                error = -EINVAL;
1770                goto unmap;
1771        }
1772        error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base);
1773        if (error)
1774                goto unmap;
1775        for (i = 0; i < ESI_LEN; i++)
1776                printk("%s%02X",i ? "-" : "",dev->esi[i]);
1777        printk(")\n");
1778        printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number,
1779            eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA",
1780            media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]);
1781
1782        error = suni_init(dev);
1783        if (error)
1784                goto unmap;
1785out:
1786        return error;
1787unmap:
1788        iounmap(base);
1789        goto out;
1790}
1791
1792static void eni_do_release(struct atm_dev *dev)
1793{
1794        struct eni_dev *ed = ENI_DEV(dev);
1795
1796        dev->phy->stop(dev);
1797        dev->phy = NULL;
1798        iounmap(ed->ioaddr);
1799}
1800
1801static int eni_start(struct atm_dev *dev)
1802{
1803        struct eni_dev *eni_dev;
1804        
1805        void __iomem *buf;
1806        unsigned long buffer_mem;
1807        int error;
1808
1809        DPRINTK(">eni_start\n");
1810        eni_dev = ENI_DEV(dev);
1811        if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) {
1812                printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
1813                    dev->number,eni_dev->irq);
1814                error = -EAGAIN;
1815                goto out;
1816        }
1817        pci_set_master(eni_dev->pci_dev);
1818        if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND,
1819            PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
1820            (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) {
1821                printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+"
1822                    "master (0x%02x)\n",dev->number,error);
1823                goto free_irq;
1824        }
1825        if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,
1826            END_SWAP_DMA))) {
1827                printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap "
1828                    "(0x%02x)\n",dev->number,error);
1829                goto free_irq;
1830        }
1831        /* determine addresses of internal tables */
1832        eni_dev->vci = eni_dev->ram;
1833        eni_dev->rx_dma = eni_dev->ram+NR_VCI*16;
1834        eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8;
1835        eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8;
1836        buf = eni_dev->service+NR_SERVICE*4;
1837        DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n",
1838             eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma,
1839             eni_dev->service,buf);
1840        spin_lock_init(&eni_dev->lock);
1841        tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev);
1842        eni_dev->events = 0;
1843        /* initialize memory management */
1844        buffer_mem = eni_dev->mem - (buf - eni_dev->ram);
1845        eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2;
1846        eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1,
1847                                           sizeof(*eni_dev->free_list),
1848                                           GFP_KERNEL);
1849        if (!eni_dev->free_list) {
1850                printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n",
1851                    dev->number);
1852                error = -ENOMEM;
1853                goto free_irq;
1854        }
1855        eni_dev->free_len = 0;
1856        eni_put_free(eni_dev,buf,buffer_mem);
1857        memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */
1858        /*
1859         * byte_addr  free (k)
1860         * 0x00000000     512  VCI table
1861         * 0x00004000     496  RX DMA
1862         * 0x00005000     492  TX DMA
1863         * 0x00006000     488  service list
1864         * 0x00007000     484  buffers
1865         * 0x00080000       0  end (512kB)
1866         */
1867        eni_out(0xffffffff,MID_IE);
1868        error = start_tx(dev);
1869        if (error) goto free_list;
1870        error = start_rx(dev);
1871        if (error) goto free_list;
1872        error = dev->phy->start(dev);
1873        if (error) goto free_list;
1874        eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) |
1875            MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE,
1876            MID_MC_S);
1877            /* Tonga uses SBus INTReq1 */
1878        (void) eni_in(MID_ISA); /* clear Midway interrupts */
1879        return 0;
1880
1881free_list:
1882        kfree(eni_dev->free_list);
1883
1884free_irq:
1885        free_irq(eni_dev->irq, dev);
1886
1887out:
1888        return error;
1889}
1890
1891
1892static void eni_close(struct atm_vcc *vcc)
1893{
1894        DPRINTK(">eni_close\n");
1895        if (!ENI_VCC(vcc)) return;
1896        clear_bit(ATM_VF_READY,&vcc->flags);
1897        close_rx(vcc);
1898        close_tx(vcc);
1899        DPRINTK("eni_close: done waiting\n");
1900        /* deallocate memory */
1901        kfree(ENI_VCC(vcc));
1902        vcc->dev_data = NULL;
1903        clear_bit(ATM_VF_ADDR,&vcc->flags);
1904        /*foo();*/
1905}
1906
1907
1908static int eni_open(struct atm_vcc *vcc)
1909{
1910        struct eni_vcc *eni_vcc;
1911        int error;
1912        short vpi = vcc->vpi;
1913        int vci = vcc->vci;
1914
1915        DPRINTK(">eni_open\n");
1916        EVENT("eni_open\n",0,0);
1917        if (!test_bit(ATM_VF_PARTIAL,&vcc->flags))
1918                vcc->dev_data = NULL;
1919        if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
1920                set_bit(ATM_VF_ADDR,&vcc->flags);
1921        if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5)
1922                return -EINVAL;
1923        DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi,
1924            vcc->vci);
1925        if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
1926                eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL);
1927                if (!eni_vcc) return -ENOMEM;
1928                vcc->dev_data = eni_vcc;
1929                eni_vcc->tx = NULL; /* for eni_close after open_rx */
1930                if ((error = open_rx_first(vcc))) {
1931                        eni_close(vcc);
1932                        return error;
1933                }
1934                if ((error = open_tx_first(vcc))) {
1935                        eni_close(vcc);
1936                        return error;
1937                }
1938        }
1939        if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0;
1940        if ((error = open_rx_second(vcc))) {
1941                eni_close(vcc);
1942                return error;
1943        }
1944        if ((error = open_tx_second(vcc))) {
1945                eni_close(vcc);
1946                return error;
1947        }
1948        set_bit(ATM_VF_READY,&vcc->flags);
1949        /* should power down SUNI while !ref_count @@@ */
1950        return 0;
1951}
1952
1953
1954static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs)
1955{
1956        struct eni_dev *eni_dev = ENI_DEV(vcc->dev);
1957        struct eni_tx *tx = ENI_VCC(vcc)->tx;
1958        struct sk_buff *skb;
1959        int error,rate,rsv,shp;
1960
1961        if (qos->txtp.traffic_class == ATM_NONE) return 0;
1962        if (tx == eni_dev->ubr) return -EBADFD;
1963        rate = atm_pcr_goal(&qos->txtp);
1964        if (rate < 0) rate = -rate;
1965        rsv = shp = 0;
1966        if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1;
1967        if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1;
1968        if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1;
1969        if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1;
1970        if (!rsv && !shp) return 0;
1971        error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp);
1972        if (error) return error;
1973        if (shp && !(flgs & ATM_MF_IMMED)) return 0;
1974        /*
1975         * Walk through the send buffer and patch the rate information in all
1976         * segmentation buffer descriptors of this VCC.
1977         */
1978        tasklet_disable(&eni_dev->task);
1979        skb_queue_walk(&eni_dev->tx_queue, skb) {
1980                void __iomem *dsc;
1981
1982                if (ATM_SKB(skb)->vcc != vcc) continue;
1983                dsc = tx->send+ENI_PRV_POS(skb)*4;
1984                writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) |
1985                    (tx->prescaler << MID_SEG_PR_SHIFT) |
1986                    (tx->resolution << MID_SEG_RATE_SHIFT), dsc);
1987        }
1988        tasklet_enable(&eni_dev->task);
1989        return 0;
1990}
1991
1992
1993static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1994{
1995        struct eni_dev *eni_dev = ENI_DEV(dev);
1996
1997        if (cmd == ENI_MEMDUMP) {
1998                if (!capable(CAP_NET_ADMIN)) return -EPERM;
1999                printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d "
2000                    "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number);
2001                dump(dev);
2002                return 0;
2003        }
2004        if (cmd == ENI_SETMULT) {
2005                struct eni_multipliers mult;
2006
2007                if (!capable(CAP_NET_ADMIN)) return -EPERM;
2008                if (copy_from_user(&mult, arg,
2009                    sizeof(struct eni_multipliers)))
2010                        return -EFAULT;
2011                if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) ||
2012                    mult.tx > 65536 || mult.rx > 65536)
2013                        return -EINVAL;
2014                if (mult.tx) eni_dev->tx_mult = mult.tx;
2015                if (mult.rx) eni_dev->rx_mult = mult.rx;
2016                return 0;
2017        }
2018        if (cmd == ATM_SETCIRANGE) {
2019                struct atm_cirange ci;
2020
2021                if (copy_from_user(&ci, arg,sizeof(struct atm_cirange)))
2022                        return -EFAULT;
2023                if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) &&
2024                    (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX))
2025                    return 0;
2026                return -EINVAL;
2027        }
2028        if (!dev->phy->ioctl) return -ENOIOCTLCMD;
2029        return dev->phy->ioctl(dev,cmd,arg);
2030}
2031
2032static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb)
2033{
2034        enum enq_res res;
2035
2036        DPRINTK(">eni_send\n");
2037        if (!ENI_VCC(vcc)->tx) {
2038                if (vcc->pop) vcc->pop(vcc,skb);
2039                else dev_kfree_skb(skb);
2040                return -EINVAL;
2041        }
2042        if (!skb) {
2043                printk(KERN_CRIT "!skb in eni_send ?\n");
2044                if (vcc->pop) vcc->pop(vcc,skb);
2045                return -EINVAL;
2046        }
2047        if (vcc->qos.aal == ATM_AAL0) {
2048                if (skb->len != ATM_CELL_SIZE-1) {
2049                        if (vcc->pop) vcc->pop(vcc,skb);
2050                        else dev_kfree_skb(skb);
2051                        return -EINVAL;
2052                }
2053                *(u32 *) skb->data = htonl(*(u32 *) skb->data);
2054        }
2055        submitted++;
2056        ATM_SKB(skb)->vcc = vcc;
2057        tasklet_disable_in_atomic(&ENI_DEV(vcc->dev)->task);
2058        res = do_tx(skb);
2059        tasklet_enable(&ENI_DEV(vcc->dev)->task);
2060        if (res == enq_ok) return 0;
2061        skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb);
2062        backlogged++;
2063        tasklet_schedule(&ENI_DEV(vcc->dev)->task);
2064        return 0;
2065}
2066
2067static void eni_phy_put(struct atm_dev *dev,unsigned char value,
2068    unsigned long addr)
2069{
2070        writel(value,ENI_DEV(dev)->phy+addr*4);
2071}
2072
2073
2074
2075static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr)
2076{
2077        return readl(ENI_DEV(dev)->phy+addr*4);
2078}
2079
2080
2081static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page)
2082{
2083        struct sock *s;
2084        static const char *signal[] = { "LOST","unknown","okay" };
2085        struct eni_dev *eni_dev = ENI_DEV(dev);
2086        struct atm_vcc *vcc;
2087        int left,i;
2088
2089        left = *pos;
2090        if (!left)
2091                return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, "
2092                    "%d cps remaining\n",dev->number,signal[(int) dev->signal],
2093                    eni_dev->mem >> 10,eni_dev->tx_bw);
2094        if (!--left)
2095                return sprintf(page,"%4sBursts: TX"
2096#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \
2097    !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \
2098    !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \
2099    !defined(CONFIG_ATM_ENI_BURST_TX_2W)
2100                    " none"
2101#endif
2102#ifdef CONFIG_ATM_ENI_BURST_TX_16W
2103                    " 16W"
2104#endif
2105#ifdef CONFIG_ATM_ENI_BURST_TX_8W
2106                    " 8W"
2107#endif
2108#ifdef CONFIG_ATM_ENI_BURST_TX_4W
2109                    " 4W"
2110#endif
2111#ifdef CONFIG_ATM_ENI_BURST_TX_2W
2112                    " 2W"
2113#endif
2114                    ", RX"
2115#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \
2116    !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \
2117    !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \
2118    !defined(CONFIG_ATM_ENI_BURST_RX_2W)
2119                    " none"
2120#endif
2121#ifdef CONFIG_ATM_ENI_BURST_RX_16W
2122                    " 16W"
2123#endif
2124#ifdef CONFIG_ATM_ENI_BURST_RX_8W
2125                    " 8W"
2126#endif
2127#ifdef CONFIG_ATM_ENI_BURST_RX_4W
2128                    " 4W"
2129#endif
2130#ifdef CONFIG_ATM_ENI_BURST_RX_2W
2131                    " 2W"
2132#endif
2133#ifndef CONFIG_ATM_ENI_TUNE_BURST
2134                    " (default)"
2135#endif
2136                    "\n","");
2137        if (!--left) 
2138                return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n",
2139                    "",eni_dev->tx_mult,eni_dev->rx_mult);
2140        for (i = 0; i < NR_CHAN; i++) {
2141                struct eni_tx *tx = eni_dev->tx+i;
2142
2143                if (!tx->send) continue;
2144                if (!--left) {
2145                        return sprintf(page, "tx[%d]:    0x%lx-0x%lx "
2146                            "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i,
2147                            (unsigned long) (tx->send - eni_dev->ram),
2148                            tx->send-eni_dev->ram+tx->words*4-1,tx->words*4,
2149                            tx->reserved,tx->shaping,
2150                            tx == eni_dev->ubr ? " (UBR)" : "");
2151                }
2152                if (--left) continue;
2153                return sprintf(page,"%10sbacklog %u packets\n","",
2154                    skb_queue_len(&tx->backlog));
2155        }
2156        read_lock(&vcc_sklist_lock);
2157        for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
2158                struct hlist_head *head = &vcc_hash[i];
2159
2160                sk_for_each(s, head) {
2161                        struct eni_vcc *eni_vcc;
2162                        int length;
2163
2164                        vcc = atm_sk(s);
2165                        if (vcc->dev != dev)
2166                                continue;
2167                        eni_vcc = ENI_VCC(vcc);
2168                        if (--left) continue;
2169                        length = sprintf(page,"vcc %4d: ",vcc->vci);
2170                        if (eni_vcc->rx) {
2171                                length += sprintf(page+length, "0x%lx-0x%lx "
2172                                    "(%6ld bytes)",
2173                                    (unsigned long) (eni_vcc->recv - eni_dev->ram),
2174                                    eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1,
2175                                    eni_vcc->words*4);
2176                                if (eni_vcc->tx) length += sprintf(page+length,", ");
2177                        }
2178                        if (eni_vcc->tx)
2179                                length += sprintf(page+length,"tx[%d], txing %d bytes",
2180                                    eni_vcc->tx->index,eni_vcc->txing);
2181                        page[length] = '\n';
2182                        read_unlock(&vcc_sklist_lock);
2183                        return length+1;
2184                }
2185        }
2186        read_unlock(&vcc_sklist_lock);
2187        for (i = 0; i < eni_dev->free_len; i++) {
2188                struct eni_free *fe = eni_dev->free_list+i;
2189                unsigned long offset;
2190
2191                if (--left) continue;
2192                offset = (unsigned long) eni_dev->ram+eni_dev->base_diff;
2193                return sprintf(page,"free      %p-%p (%6d bytes)\n",
2194                    fe->start-offset,fe->start-offset+(1 << fe->order)-1,
2195                    1 << fe->order);
2196        }
2197        return 0;
2198}
2199
2200
2201static const struct atmdev_ops ops = {
2202        .open           = eni_open,
2203        .close          = eni_close,
2204        .ioctl          = eni_ioctl,
2205        .send           = eni_send,
2206        .phy_put        = eni_phy_put,
2207        .phy_get        = eni_phy_get,
2208        .change_qos     = eni_change_qos,
2209        .proc_read      = eni_proc_read
2210};
2211
2212
2213static int eni_init_one(struct pci_dev *pci_dev,
2214                        const struct pci_device_id *ent)
2215{
2216        struct atm_dev *dev;
2217        struct eni_dev *eni_dev;
2218        struct eni_zero *zero;
2219        int rc;
2220
2221        rc = pci_enable_device(pci_dev);
2222        if (rc < 0)
2223                goto out;
2224
2225        rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32));
2226        if (rc < 0)
2227                goto err_disable;
2228
2229        rc = -ENOMEM;
2230        eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL);
2231        if (!eni_dev)
2232                goto err_disable;
2233
2234        zero = &eni_dev->zero;
2235        zero->addr = dma_alloc_coherent(&pci_dev->dev,
2236                                        ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL);
2237        if (!zero->addr)
2238                goto err_kfree;
2239
2240        dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL);
2241        if (!dev)
2242                goto err_free_consistent;
2243
2244        dev->dev_data = eni_dev;
2245        pci_set_drvdata(pci_dev, dev);
2246        eni_dev->pci_dev = pci_dev;
2247        eni_dev->asic = ent->driver_data;
2248
2249        rc = eni_do_init(dev);
2250        if (rc < 0)
2251                goto err_unregister;
2252
2253        rc = eni_start(dev);
2254        if (rc < 0)
2255                goto err_eni_release;
2256
2257        eni_dev->more = eni_boards;
2258        eni_boards = dev;
2259out:
2260        return rc;
2261
2262err_eni_release:
2263        dev->phy = NULL;
2264        iounmap(ENI_DEV(dev)->ioaddr);
2265err_unregister:
2266        atm_dev_deregister(dev);
2267err_free_consistent:
2268        dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2269err_kfree:
2270        kfree(eni_dev);
2271err_disable:
2272        pci_disable_device(pci_dev);
2273        goto out;
2274}
2275
2276
2277static const struct pci_device_id eni_pci_tbl[] = {
2278        { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ },
2279        { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ },
2280        { 0, }
2281};
2282MODULE_DEVICE_TABLE(pci,eni_pci_tbl);
2283
2284
2285static void eni_remove_one(struct pci_dev *pdev)
2286{
2287        struct atm_dev *dev = pci_get_drvdata(pdev);
2288        struct eni_dev *ed = ENI_DEV(dev);
2289        struct eni_zero *zero = &ed->zero;
2290
2291        eni_do_release(dev);
2292        atm_dev_deregister(dev);
2293        dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma);
2294        kfree(ed);
2295        pci_disable_device(pdev);
2296}
2297
2298
2299static struct pci_driver eni_driver = {
2300        .name           = DEV_LABEL,
2301        .id_table       = eni_pci_tbl,
2302        .probe          = eni_init_one,
2303        .remove         = eni_remove_one,
2304};
2305
2306
2307static int __init eni_init(void)
2308{
2309        struct sk_buff *skb; /* dummy for sizeof */
2310
2311        BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv));
2312        return pci_register_driver(&eni_driver);
2313}
2314
2315
2316module_init(eni_init);
2317/* @@@ since exit routine not defined, this module can not be unloaded */
2318
2319MODULE_LICENSE("GPL");
2320