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/config.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 <asm/system.h> 23 #include <asm/io.h> 24 #include <asm/atomic.h> 25 #include <asm/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 #if !defined(__i386__) && !defined(__x86_64__) 35 #ifndef ioremap_nocache 36 #define ioremap_nocache(X,Y) ioremap(X,Y) 37 #endif 38 #endif 39 40 /* 41 * TODO: 42 * 43 * Show stoppers 44 * none 45 * 46 * Minor 47 * - OAM support 48 * - fix bugs listed below 49 */ 50 51 /* 52 * KNOWN BUGS: 53 * 54 * - may run into JK-JK bug and deadlock 55 * - should allocate UBR channel first 56 * - buffer space allocation algorithm is stupid 57 * (RX: should be maxSDU+maxdelay*rate 58 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) 59 * - doesn't support OAM cells 60 * - eni_put_free may hang if not putting memory fragments that _complete_ 61 * 2^n block (never happens in real life, though) 62 * - keeps IRQ even if initialization fails 63 */ 64 65 66 #if 0 67 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) 68 #else 69 #define DPRINTK(format,args...) 70 #endif 71 72 73 #ifndef CONFIG_ATM_ENI_TUNE_BURST 74 #define CONFIG_ATM_ENI_BURST_TX_8W 75 #define CONFIG_ATM_ENI_BURST_RX_4W 76 #endif 77 78 79 #ifndef CONFIG_ATM_ENI_DEBUG 80 81 82 #define NULLCHECK(x) 83 84 #define EVENT(s,a,b) 85 86 87 static void event_dump(void) 88 { 89 } 90 91 92 #else 93 94 95 /* 96 * NULL pointer checking 97 */ 98 99 #define NULLCHECK(x) \ 100 if ((unsigned long) (x) < 0x30) \ 101 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) 102 103 /* 104 * Very extensive activity logging. Greatly improves bug detection speed but 105 * costs a few Mbps if enabled. 106 */ 107 108 #define EV 64 109 110 static const char *ev[EV]; 111 static unsigned long ev_a[EV],ev_b[EV]; 112 static int ec = 0; 113 114 115 static void EVENT(const char *s,unsigned long a,unsigned long b) 116 { 117 ev[ec] = s; 118 ev_a[ec] = a; 119 ev_b[ec] = b; 120 ec = (ec+1) % EV; 121 } 122 123 124 static void event_dump(void) 125 { 126 int n,i; 127 128 for (n = 0; n < EV; n++) { 129 i = (ec+n) % EV; 130 printk(KERN_NOTICE); 131 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]); 132 } 133 } 134 135 136 #endif /* CONFIG_ATM_ENI_DEBUG */ 137 138 139 /* 140 * NExx must not be equal at end 141 * EExx may be equal at end 142 * xxPJOK verify validity of pointer jumps 143 * xxPMOK operating on a circular buffer of "c" words 144 */ 145 146 #define NEPJOK(a0,a1,b) \ 147 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) 148 #define EEPJOK(a0,a1,b) \ 149 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) 150 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) 151 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) 152 153 154 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, 155 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, 156 putting = 0; 157 158 static struct atm_dev *eni_boards = NULL; 159 160 static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */ 161 static dma_addr_t zeroes; 162 163 /* Read/write registers on card */ 164 #define eni_in(r) readl(eni_dev->reg+(r)*4) 165 #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4) 166 167 168 /*-------------------------------- utilities --------------------------------*/ 169 170 171 static void dump_mem(struct eni_dev *eni_dev) 172 { 173 int i; 174 175 for (i = 0; i < eni_dev->free_len; i++) 176 printk(KERN_DEBUG " %d: %p %d\n",i, 177 eni_dev->free_list[i].start, 178 1 << eni_dev->free_list[i].order); 179 } 180 181 182 static void dump(struct atm_dev *dev) 183 { 184 struct eni_dev *eni_dev; 185 186 int i; 187 188 eni_dev = ENI_DEV(dev); 189 printk(KERN_NOTICE "Free memory\n"); 190 dump_mem(eni_dev); 191 printk(KERN_NOTICE "TX buffers\n"); 192 for (i = 0; i < NR_CHAN; i++) 193 if (eni_dev->tx[i].send) 194 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i, 195 eni_dev->tx[i].send,eni_dev->tx[i].words*4); 196 printk(KERN_NOTICE "RX buffers\n"); 197 for (i = 0; i < 1024; i++) 198 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx) 199 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i, 200 ENI_VCC(eni_dev->rx_map[i])->recv, 201 ENI_VCC(eni_dev->rx_map[i])->words*4); 202 printk(KERN_NOTICE "----\n"); 203 } 204 205 206 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, 207 unsigned long size) 208 { 209 struct eni_free *list; 210 int len,order; 211 212 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size); 213 start += eni_dev->base_diff; 214 list = eni_dev->free_list; 215 len = eni_dev->free_len; 216 while (size) { 217 if (len >= eni_dev->free_list_size) { 218 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n", 219 start,size); 220 break; 221 } 222 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++); 223 if (MID_MIN_BUF_SIZE > (1 << order)) { 224 printk(KERN_CRIT "eni_put_free: order %d too small\n", 225 order); 226 break; 227 } 228 list[len].start = (void __iomem *) start; 229 list[len].order = order; 230 len++; 231 start += 1 << order; 232 size -= 1 << order; 233 } 234 eni_dev->free_len = len; 235 /*dump_mem(eni_dev);*/ 236 } 237 238 239 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) 240 { 241 struct eni_free *list; 242 void __iomem *start; 243 int len,i,order,best_order,index; 244 245 list = eni_dev->free_list; 246 len = eni_dev->free_len; 247 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE; 248 if (*size > MID_MAX_BUF_SIZE) return NULL; 249 for (order = 0; (1 << order) < *size; order++); 250 DPRINTK("trying: %ld->%d\n",*size,order); 251 best_order = 65; /* we don't have more than 2^64 of anything ... */ 252 index = 0; /* silence GCC */ 253 for (i = 0; i < len; i++) 254 if (list[i].order == order) { 255 best_order = order; 256 index = i; 257 break; 258 } 259 else if (best_order > list[i].order && list[i].order > order) { 260 best_order = list[i].order; 261 index = i; 262 } 263 if (best_order == 65) return NULL; 264 start = list[index].start-eni_dev->base_diff; 265 list[index] = list[--len]; 266 eni_dev->free_len = len; 267 *size = 1 << order; 268 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size); 269 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start); 270 memset_io(start,0,*size); /* never leak data */ 271 /*dump_mem(eni_dev);*/ 272 return start; 273 } 274 275 276 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, 277 unsigned long size) 278 { 279 struct eni_free *list; 280 int len,i,order; 281 282 start += eni_dev->base_diff; 283 list = eni_dev->free_list; 284 len = eni_dev->free_len; 285 for (order = -1; size; order++) size >>= 1; 286 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order); 287 for (i = 0; i < len; i++) 288 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && 289 list[i].order == order) { 290 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i, 291 list[i].start,start,1 << order,list[i].order,order); 292 list[i] = list[--len]; 293 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); 294 order++; 295 i = -1; 296 continue; 297 } 298 if (len >= eni_dev->free_list_size) { 299 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start, 300 order); 301 return; 302 } 303 list[len].start = start; 304 list[len].order = order; 305 eni_dev->free_len = len+1; 306 /*dump_mem(eni_dev);*/ 307 } 308 309 310 /*----------------------------------- RX ------------------------------------*/ 311 312 313 #define ENI_VCC_NOS ((struct atm_vcc *) 1) 314 315 316 static void rx_ident_err(struct atm_vcc *vcc) 317 { 318 struct atm_dev *dev; 319 struct eni_dev *eni_dev; 320 struct eni_vcc *eni_vcc; 321 322 dev = vcc->dev; 323 eni_dev = ENI_DEV(dev); 324 /* immediately halt adapter */ 325 eni_out(eni_in(MID_MC_S) & 326 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); 327 /* dump useful information */ 328 eni_vcc = ENI_VCC(vcc); 329 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " 330 "mismatch\n",dev->number); 331 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci, 332 eni_vcc->rxing,eni_vcc->words); 333 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " 334 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos, 335 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); 336 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last, 337 eni_vcc->servicing); 338 EVENT("---dump ends here---\n",0,0); 339 printk(KERN_NOTICE "---recent events---\n"); 340 event_dump(); 341 ENI_DEV(dev)->fast = NULL; /* really stop it */ 342 ENI_DEV(dev)->slow = NULL; 343 skb_queue_head_init(&ENI_DEV(dev)->rx_queue); 344 } 345 346 347 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, 348 unsigned long skip,unsigned long size,unsigned long eff) 349 { 350 struct eni_dev *eni_dev; 351 struct eni_vcc *eni_vcc; 352 u32 dma_rd,dma_wr; 353 u32 dma[RX_DMA_BUF*2]; 354 dma_addr_t paddr; 355 unsigned long here; 356 int i,j; 357 358 eni_dev = ENI_DEV(vcc->dev); 359 eni_vcc = ENI_VCC(vcc); 360 paddr = 0; /* GCC, shut up */ 361 if (skb) { 362 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, 363 PCI_DMA_FROMDEVICE); 364 ENI_PRV_PADDR(skb) = paddr; 365 if (paddr & 3) 366 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " 367 "mis-aligned RX data (0x%lx)\n",vcc->dev->number, 368 vcc->vci,(unsigned long) paddr); 369 ENI_PRV_SIZE(skb) = size+skip; 370 /* PDU plus descriptor */ 371 ATM_SKB(skb)->vcc = vcc; 372 } 373 j = 0; 374 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ 375 here = (eni_vcc->descr+skip) & (eni_vcc->words-1); 376 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci 377 << MID_DMA_VCI_SHIFT) | MID_DT_JK; 378 j++; 379 } 380 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); 381 if (!eff) size += skip; 382 else { 383 unsigned long words; 384 385 if (!size) { 386 DPRINTK("strange things happen ...\n"); 387 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n", 388 size,eff); 389 } 390 words = eff; 391 if (paddr & 15) { 392 unsigned long init; 393 394 init = 4-((paddr & 15) >> 2); 395 if (init > words) init = words; 396 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 397 (vcc->vci << MID_DMA_VCI_SHIFT); 398 dma[j++] = paddr; 399 paddr += init << 2; 400 words -= init; 401 } 402 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ 403 if (words & ~15) { 404 dma[j++] = MID_DT_16W | ((words >> 4) << 405 MID_DMA_COUNT_SHIFT) | (vcc->vci << 406 MID_DMA_VCI_SHIFT); 407 dma[j++] = paddr; 408 paddr += (words & ~15) << 2; 409 words &= 15; 410 } 411 #endif 412 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ 413 if (words & ~7) { 414 dma[j++] = MID_DT_8W | ((words >> 3) << 415 MID_DMA_COUNT_SHIFT) | (vcc->vci << 416 MID_DMA_VCI_SHIFT); 417 dma[j++] = paddr; 418 paddr += (words & ~7) << 2; 419 words &= 7; 420 } 421 #endif 422 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ 423 if (words & ~3) { 424 dma[j++] = MID_DT_4W | ((words >> 2) << 425 MID_DMA_COUNT_SHIFT) | (vcc->vci << 426 MID_DMA_VCI_SHIFT); 427 dma[j++] = paddr; 428 paddr += (words & ~3) << 2; 429 words &= 3; 430 } 431 #endif 432 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ 433 if (words & ~1) { 434 dma[j++] = MID_DT_2W | ((words >> 1) << 435 MID_DMA_COUNT_SHIFT) | (vcc->vci << 436 MID_DMA_VCI_SHIFT); 437 dma[j++] = paddr; 438 paddr += (words & ~1) << 2; 439 words &= 1; 440 } 441 #endif 442 if (words) { 443 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) 444 | (vcc->vci << MID_DMA_VCI_SHIFT); 445 dma[j++] = paddr; 446 } 447 } 448 if (size != eff) { 449 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | 450 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; 451 j++; 452 } 453 if (!j || j > 2*RX_DMA_BUF) { 454 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n"); 455 goto trouble; 456 } 457 dma[j-2] |= MID_DMA_END; 458 j = j >> 1; 459 dma_wr = eni_in(MID_DMA_WR_RX); 460 dma_rd = eni_in(MID_DMA_RD_RX); 461 /* 462 * Can I move the dma_wr pointer by 2j+1 positions without overwriting 463 * data that hasn't been read (position of dma_rd) yet ? 464 */ 465 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ 466 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n", 467 vcc->dev->number); 468 goto trouble; 469 } 470 for (i = 0; i < j; i++) { 471 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8); 472 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4); 473 dma_wr = (dma_wr+1) & (NR_DMA_RX-1); 474 } 475 if (skb) { 476 ENI_PRV_POS(skb) = eni_vcc->descr+size+1; 477 skb_queue_tail(&eni_dev->rx_queue,skb); 478 eni_vcc->last = skb; 479 rx_enqueued++; 480 } 481 eni_vcc->descr = here; 482 eni_out(dma_wr,MID_DMA_WR_RX); 483 return 0; 484 485 trouble: 486 if (paddr) 487 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len, 488 PCI_DMA_FROMDEVICE); 489 if (skb) dev_kfree_skb_irq(skb); 490 return -1; 491 } 492 493 494 static void discard(struct atm_vcc *vcc,unsigned long size) 495 { 496 struct eni_vcc *eni_vcc; 497 498 eni_vcc = ENI_VCC(vcc); 499 EVENT("discard (size=%ld)\n",size,0); 500 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0); 501 /* could do a full fallback, but that might be more expensive */ 502 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1; 503 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1); 504 } 505 506 507 /* 508 * TODO: should check whether direct copies (without DMA setup, dequeuing on 509 * interrupt, etc.) aren't much faster for AAL0 510 */ 511 512 static int rx_aal0(struct atm_vcc *vcc) 513 { 514 struct eni_vcc *eni_vcc; 515 unsigned long descr; 516 unsigned long length; 517 struct sk_buff *skb; 518 519 DPRINTK(">rx_aal0\n"); 520 eni_vcc = ENI_VCC(vcc); 521 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 522 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 523 rx_ident_err(vcc); 524 return 1; 525 } 526 if (descr & MID_RED_T) { 527 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 528 vcc->dev->number); 529 length = 0; 530 atomic_inc(&vcc->stats->rx_err); 531 } 532 else { 533 length = ATM_CELL_SIZE-1; /* no HEC */ 534 } 535 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL; 536 if (!skb) { 537 discard(vcc,length >> 2); 538 return 0; 539 } 540 skb_put(skb,length); 541 skb->stamp = eni_vcc->timestamp; 542 DPRINTK("got len %ld\n",length); 543 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1; 544 eni_vcc->rxing++; 545 return 0; 546 } 547 548 549 static int rx_aal5(struct atm_vcc *vcc) 550 { 551 struct eni_vcc *eni_vcc; 552 unsigned long descr; 553 unsigned long size,eff,length; 554 struct sk_buff *skb; 555 556 EVENT("rx_aal5\n",0,0); 557 DPRINTK(">rx_aal5\n"); 558 eni_vcc = ENI_VCC(vcc); 559 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 560 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 561 rx_ident_err(vcc); 562 return 1; 563 } 564 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) { 565 if (descr & MID_RED_T) { 566 EVENT("empty cell (descr=0x%lx)\n",descr,0); 567 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 568 vcc->dev->number); 569 size = 0; 570 } 571 else { 572 static unsigned long silence = 0; 573 574 if (time_after(jiffies, silence) || silence == 0) { 575 printk(KERN_WARNING DEV_LABEL "(itf %d): " 576 "discarding PDU(s) with CRC error\n", 577 vcc->dev->number); 578 silence = (jiffies+2*HZ)|1; 579 } 580 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 581 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr, 582 size); 583 } 584 eff = length = 0; 585 atomic_inc(&vcc->stats->rx_err); 586 } 587 else { 588 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 589 DPRINTK("size=%ld\n",size); 590 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) & 591 (eni_vcc->words-1)))*4) & 0xffff; 592 /* -trailer(2)+header(1) */ 593 if (length && length <= (size << 2)-8 && length <= 594 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2; 595 else { /* ^ trailer length (8) */ 596 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr, 597 length); 598 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU " 599 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n", 600 vcc->dev->number,vcc->vci,length,size << 2,descr); 601 length = eff = 0; 602 atomic_inc(&vcc->stats->rx_err); 603 } 604 } 605 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL; 606 if (!skb) { 607 discard(vcc,size); 608 return 0; 609 } 610 skb_put(skb,length); 611 DPRINTK("got len %ld\n",length); 612 if (do_rx_dma(vcc,skb,1,size,eff)) return 1; 613 eni_vcc->rxing++; 614 return 0; 615 } 616 617 618 static inline int rx_vcc(struct atm_vcc *vcc) 619 { 620 void __iomem *vci_dsc; 621 unsigned long tmp; 622 struct eni_vcc *eni_vcc; 623 624 eni_vcc = ENI_VCC(vcc); 625 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16; 626 EVENT("rx_vcc(1)\n",0,0); 627 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >> 628 MID_VCI_DESCR_SHIFT)) { 629 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n", 630 eni_vcc->descr,tmp); 631 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 632 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 633 MID_VCI_DESCR_SHIFT)); 634 if (ENI_VCC(vcc)->rx(vcc)) return 1; 635 } 636 /* clear IN_SERVICE flag */ 637 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc); 638 /* 639 * If new data has arrived between evaluating the while condition and 640 * clearing IN_SERVICE, we wouldn't be notified until additional data 641 * follows. So we have to loop again to be sure. 642 */ 643 EVENT("rx_vcc(3)\n",0,0); 644 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) 645 >> MID_VCI_DESCR_SHIFT)) { 646 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n", 647 eni_vcc->descr,tmp); 648 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 649 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 650 MID_VCI_DESCR_SHIFT)); 651 if (ENI_VCC(vcc)->rx(vcc)) return 1; 652 } 653 return 0; 654 } 655 656 657 static void poll_rx(struct atm_dev *dev) 658 { 659 struct eni_dev *eni_dev; 660 struct atm_vcc *curr; 661 662 eni_dev = ENI_DEV(dev); 663 while ((curr = eni_dev->fast)) { 664 EVENT("poll_rx.fast\n",0,0); 665 if (rx_vcc(curr)) return; 666 eni_dev->fast = ENI_VCC(curr)->next; 667 ENI_VCC(curr)->next = ENI_VCC_NOS; 668 barrier(); 669 ENI_VCC(curr)->servicing--; 670 } 671 while ((curr = eni_dev->slow)) { 672 EVENT("poll_rx.slow\n",0,0); 673 if (rx_vcc(curr)) return; 674 eni_dev->slow = ENI_VCC(curr)->next; 675 ENI_VCC(curr)->next = ENI_VCC_NOS; 676 barrier(); 677 ENI_VCC(curr)->servicing--; 678 } 679 } 680 681 682 static void get_service(struct atm_dev *dev) 683 { 684 struct eni_dev *eni_dev; 685 struct atm_vcc *vcc; 686 unsigned long vci; 687 688 DPRINTK(">get_service\n"); 689 eni_dev = ENI_DEV(dev); 690 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) { 691 vci = readl(eni_dev->service+eni_dev->serv_read*4); 692 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1); 693 vcc = eni_dev->rx_map[vci & 1023]; 694 if (!vcc) { 695 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not " 696 "found\n",dev->number,vci); 697 continue; /* nasty but we try to go on anyway */ 698 /* @@@ nope, doesn't work */ 699 } 700 EVENT("getting from service\n",0,0); 701 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) { 702 EVENT("double service\n",0,0); 703 DPRINTK("Grr, servicing VCC %ld twice\n",vci); 704 continue; 705 } 706 do_gettimeofday(&ENI_VCC(vcc)->timestamp); 707 ENI_VCC(vcc)->next = NULL; 708 if (vcc->qos.rxtp.traffic_class == ATM_CBR) { 709 if (eni_dev->fast) 710 ENI_VCC(eni_dev->last_fast)->next = vcc; 711 else eni_dev->fast = vcc; 712 eni_dev->last_fast = vcc; 713 } 714 else { 715 if (eni_dev->slow) 716 ENI_VCC(eni_dev->last_slow)->next = vcc; 717 else eni_dev->slow = vcc; 718 eni_dev->last_slow = vcc; 719 } 720 putting++; 721 ENI_VCC(vcc)->servicing++; 722 } 723 } 724 725 726 static void dequeue_rx(struct atm_dev *dev) 727 { 728 struct eni_dev *eni_dev; 729 struct eni_vcc *eni_vcc; 730 struct atm_vcc *vcc; 731 struct sk_buff *skb; 732 void __iomem *vci_dsc; 733 int first; 734 735 eni_dev = ENI_DEV(dev); 736 first = 1; 737 while (1) { 738 skb = skb_dequeue(&eni_dev->rx_queue); 739 if (!skb) { 740 if (first) { 741 DPRINTK(DEV_LABEL "(itf %d): RX but not " 742 "rxing\n",dev->number); 743 EVENT("nothing to dequeue\n",0,0); 744 } 745 break; 746 } 747 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb), 748 ENI_PRV_POS(skb)); 749 rx_dequeued++; 750 vcc = ATM_SKB(skb)->vcc; 751 eni_vcc = ENI_VCC(vcc); 752 first = 0; 753 vci_dsc = eni_dev->vci+vcc->vci*16; 754 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb), 755 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT, 756 eni_vcc->words)) { 757 EVENT("requeuing\n",0,0); 758 skb_queue_head(&eni_dev->rx_queue,skb); 759 break; 760 } 761 eni_vcc->rxing--; 762 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1); 763 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, 764 PCI_DMA_TODEVICE); 765 if (!skb->len) dev_kfree_skb_irq(skb); 766 else { 767 EVENT("pushing (len=%ld)\n",skb->len,0); 768 if (vcc->qos.aal == ATM_AAL0) 769 *(unsigned long *) skb->data = 770 ntohl(*(unsigned long *) skb->data); 771 memset(skb->cb,0,sizeof(struct eni_skb_prv)); 772 vcc->push(vcc,skb); 773 pushed++; 774 } 775 atomic_inc(&vcc->stats->rx); 776 } 777 wake_up(&eni_dev->rx_wait); 778 } 779 780 781 static int open_rx_first(struct atm_vcc *vcc) 782 { 783 struct eni_dev *eni_dev; 784 struct eni_vcc *eni_vcc; 785 unsigned long size; 786 787 DPRINTK("open_rx_first\n"); 788 eni_dev = ENI_DEV(vcc->dev); 789 eni_vcc = ENI_VCC(vcc); 790 eni_vcc->rx = NULL; 791 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; 792 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100; 793 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <= 794 MID_MAX_BUF_SIZE) 795 size = MID_MAX_BUF_SIZE; 796 eni_vcc->recv = eni_alloc_mem(eni_dev,&size); 797 DPRINTK("rx at 0x%lx\n",eni_vcc->recv); 798 eni_vcc->words = size >> 2; 799 if (!eni_vcc->recv) return -ENOBUFS; 800 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0; 801 eni_vcc->descr = 0; 802 eni_vcc->rx_pos = 0; 803 eni_vcc->rxing = 0; 804 eni_vcc->servicing = 0; 805 eni_vcc->next = ENI_VCC_NOS; 806 return 0; 807 } 808 809 810 static int open_rx_second(struct atm_vcc *vcc) 811 { 812 void __iomem *here; 813 struct eni_dev *eni_dev; 814 struct eni_vcc *eni_vcc; 815 unsigned long size; 816 int order; 817 818 DPRINTK("open_rx_second\n"); 819 eni_dev = ENI_DEV(vcc->dev); 820 eni_vcc = ENI_VCC(vcc); 821 if (!eni_vcc->rx) return 0; 822 /* set up VCI descriptor */ 823 here = eni_dev->vci+vcc->vci*16; 824 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4); 825 size = eni_vcc->words >> 8; 826 for (order = -1; size; order++) size >>= 1; 827 writel(0,here+4); /* descr, read = 0 */ 828 writel(0,here+8); /* write, state, count = 0 */ 829 if (eni_dev->rx_map[vcc->vci]) 830 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already " 831 "in use\n",vcc->dev->number,vcc->vci); 832 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */ 833 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) << 834 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE | 835 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) << 836 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here); 837 return 0; 838 } 839 840 841 static void close_rx(struct atm_vcc *vcc) 842 { 843 DECLARE_WAITQUEUE(wait,current); 844 void __iomem *here; 845 struct eni_dev *eni_dev; 846 struct eni_vcc *eni_vcc; 847 848 eni_vcc = ENI_VCC(vcc); 849 if (!eni_vcc->rx) return; 850 eni_dev = ENI_DEV(vcc->dev); 851 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { 852 here = eni_dev->vci+vcc->vci*16; 853 /* block receiver */ 854 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << 855 MID_VCI_MODE_SHIFT),here); 856 /* wait for receiver to become idle */ 857 udelay(27); 858 /* discard pending cell */ 859 writel(readl(here) & ~MID_VCI_IN_SERVICE,here); 860 /* don't accept any new ones */ 861 eni_dev->rx_map[vcc->vci] = NULL; 862 /* wait for RX queue to drain */ 863 DPRINTK("eni_close: waiting for RX ...\n"); 864 EVENT("RX closing\n",0,0); 865 add_wait_queue(&eni_dev->rx_wait,&wait); 866 set_current_state(TASK_UNINTERRUPTIBLE); 867 barrier(); 868 for (;;) { 869 /* transition service->rx: rxing++, servicing-- */ 870 if (!eni_vcc->servicing) { 871 barrier(); 872 if (!eni_vcc->rxing) break; 873 } 874 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing, 875 eni_vcc->servicing); 876 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing, 877 eni_vcc->rxing); 878 schedule(); 879 set_current_state(TASK_UNINTERRUPTIBLE); 880 } 881 for (;;) { 882 int at_end; 883 u32 tmp; 884 885 tasklet_disable(&eni_dev->task); 886 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ; 887 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT; 888 tasklet_enable(&eni_dev->task); 889 if (at_end) break; 890 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n", 891 eni_vcc->rx_pos,tmp); 892 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n", 893 eni_vcc->rx_pos,tmp); 894 schedule(); 895 set_current_state(TASK_UNINTERRUPTIBLE); 896 } 897 set_current_state(TASK_RUNNING); 898 remove_wait_queue(&eni_dev->rx_wait,&wait); 899 } 900 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2); 901 eni_vcc->rx = NULL; 902 } 903 904 905 static int start_rx(struct atm_dev *dev) 906 { 907 struct eni_dev *eni_dev; 908 909 eni_dev = ENI_DEV(dev); 910 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL); 911 if (!eni_dev->rx_map) { 912 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 913 dev->number); 914 free_page((unsigned long) eni_dev->free_list); 915 return -ENOMEM; 916 } 917 memset(eni_dev->rx_map,0,PAGE_SIZE); 918 eni_dev->rx_mult = DEFAULT_RX_MULT; 919 eni_dev->fast = eni_dev->last_fast = NULL; 920 eni_dev->slow = eni_dev->last_slow = NULL; 921 init_waitqueue_head(&eni_dev->rx_wait); 922 skb_queue_head_init(&eni_dev->rx_queue); 923 eni_dev->serv_read = eni_in(MID_SERV_WRITE); 924 eni_out(0,MID_DMA_WR_RX); 925 return 0; 926 } 927 928 929 /*----------------------------------- TX ------------------------------------*/ 930 931 932 enum enq_res { enq_ok,enq_next,enq_jam }; 933 934 935 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, 936 u32 size) 937 { 938 u32 init,words; 939 940 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size); 941 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size); 942 #if 0 /* don't complain anymore */ 943 if (paddr & 3) 944 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr); 945 if (size & 3) 946 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size); 947 #endif 948 if (paddr & 3) { 949 init = 4-(paddr & 3); 950 if (init > size || size < 7) init = size; 951 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n", 952 (unsigned long) paddr,init,size); 953 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | 954 (chan << MID_DMA_CHAN_SHIFT); 955 dma[(*j)++] = paddr; 956 paddr += init; 957 size -= init; 958 } 959 words = size >> 2; 960 size &= 3; 961 if (words && (paddr & 31)) { 962 init = 8-((paddr & 31) >> 2); 963 if (init > words) init = words; 964 DPRINTK("put_dma: %lx DMA: %d/%d words\n", 965 (unsigned long) paddr,init,words); 966 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 967 (chan << MID_DMA_CHAN_SHIFT); 968 dma[(*j)++] = paddr; 969 paddr += init << 2; 970 words -= init; 971 } 972 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ 973 if (words & ~15) { 974 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n", 975 (unsigned long) paddr,words >> 4,words); 976 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) 977 | (chan << MID_DMA_CHAN_SHIFT); 978 dma[(*j)++] = paddr; 979 paddr += (words & ~15) << 2; 980 words &= 15; 981 } 982 #endif 983 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ 984 if (words & ~7) { 985 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n", 986 (unsigned long) paddr,words >> 3,words); 987 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) 988 | (chan << MID_DMA_CHAN_SHIFT); 989 dma[(*j)++] = paddr; 990 paddr += (words & ~7) << 2; 991 words &= 7; 992 } 993 #endif 994 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ 995 if (words & ~3) { 996 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n", 997 (unsigned long) paddr,words >> 2,words); 998 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) 999 | (chan << MID_DMA_CHAN_SHIFT); 1000 dma[(*j)++] = paddr; 1001 paddr += (words & ~3) << 2; 1002 words &= 3; 1003 } 1004 #endif 1005 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ 1006 if (words & ~1) { 1007 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n", 1008 (unsigned long) paddr,words >> 1,words); 1009 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) 1010 | (chan << MID_DMA_CHAN_SHIFT); 1011 dma[(*j)++] = paddr; 1012 paddr += (words & ~1) << 2; 1013 words &= 1; 1014 } 1015 #endif 1016 if (words) { 1017 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr, 1018 words); 1019 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | 1020 (chan << MID_DMA_CHAN_SHIFT); 1021 dma[(*j)++] = paddr; 1022 paddr += words << 2; 1023 } 1024 if (size) { 1025 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr, 1026 size); 1027 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | 1028 (chan << MID_DMA_CHAN_SHIFT); 1029 dma[(*j)++] = paddr; 1030 } 1031 } 1032 1033 1034 static enum enq_res do_tx(struct sk_buff *skb) 1035 { 1036 struct atm_vcc *vcc; 1037 struct eni_dev *eni_dev; 1038 struct eni_vcc *eni_vcc; 1039 struct eni_tx *tx; 1040 dma_addr_t paddr; 1041 u32 dma_rd,dma_wr; 1042 u32 size; /* in words */ 1043 int aal5,dma_size,i,j; 1044 1045 DPRINTK(">do_tx\n"); 1046 NULLCHECK(skb); 1047 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); 1048 vcc = ATM_SKB(skb)->vcc; 1049 NULLCHECK(vcc); 1050 eni_dev = ENI_DEV(vcc->dev); 1051 NULLCHECK(eni_dev); 1052 eni_vcc = ENI_VCC(vcc); 1053 tx = eni_vcc->tx; 1054 NULLCHECK(tx); 1055 #if 0 /* Enable this for testing with the "align" program */ 1056 { 1057 unsigned int hack = *((char *) skb->data)-'0'; 1058 1059 if (hack < 8) { 1060 skb->data += hack; 1061 skb->len -= hack; 1062 } 1063 } 1064 #endif 1065 #if 0 /* should work now */ 1066 if ((unsigned long) skb->data & 3) 1067 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " 1068 "TX data\n",vcc->dev->number,vcc->vci); 1069 #endif 1070 /* 1071 * Potential future IP speedup: make hard_header big enough to put 1072 * segmentation descriptor directly into PDU. Saves: 4 slave writes, 1073 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) 1074 */ 1075 1076 aal5 = vcc->qos.aal == ATM_AAL5; 1077 /* check space in buffer */ 1078 if (!aal5) 1079 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; 1080 /* cell without HEC plus segmentation header (includes 1081 four-byte cell header) */ 1082 else { 1083 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; 1084 /* add AAL5 trailer */ 1085 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; 1086 /* add segmentation header */ 1087 } 1088 /* 1089 * Can I move tx_pos by size bytes without getting closer than TX_GAP 1090 * to the read pointer ? TX_GAP means to leave some space for what 1091 * the manual calls "too close". 1092 */ 1093 if (!NEPMOK(tx->tx_pos,size+TX_GAP, 1094 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { 1095 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", 1096 vcc->dev->number,size); 1097 return enq_next; 1098 } 1099 /* check DMA */ 1100 dma_wr = eni_in(MID_DMA_WR_TX); 1101 dma_rd = eni_in(MID_DMA_RD_TX); 1102 dma_size = 3; /* JK for descriptor and final fill, plus final size 1103 mis-alignment fix */ 1104 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); 1105 if (!skb_shinfo(skb)->nr_frags) dma_size += 5; 1106 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); 1107 if (dma_size > TX_DMA_BUF) { 1108 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " 1109 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); 1110 } 1111 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); 1112 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < 1113 dma_size) { 1114 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", 1115 vcc->dev->number); 1116 return enq_jam; 1117 } 1118 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, 1119 PCI_DMA_TODEVICE); 1120 ENI_PRV_PADDR(skb) = paddr; 1121 /* prepare DMA queue entries */ 1122 j = 0; 1123 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << 1124 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1125 MID_DT_JK; 1126 j++; 1127 if (!skb_shinfo(skb)->nr_frags) 1128 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); 1129 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); 1130 else { 1131 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ 1132 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) 1133 if (i == -1) 1134 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1135 skb->data, 1136 skb->len - skb->data_len); 1137 else 1138 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1139 skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset, 1140 skb_shinfo(skb)->frags[i].size); 1141 } 1142 if (skb->len & 3) 1143 put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3)); 1144 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ 1145 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << 1146 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1147 MID_DMA_END | MID_DT_JK; 1148 j++; 1149 DPRINTK("DMA at end: %d\n",j); 1150 /* store frame */ 1151 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | 1152 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | 1153 (tx->resolution << MID_SEG_RATE_SHIFT) | 1154 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); 1155 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ 1156 writel((vcc->vci << MID_SEG_VCI_SHIFT) | 1157 (aal5 ? 0 : (skb->data[3] & 0xf)) | 1158 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), 1159 tx->send+((tx->tx_pos+1) & (tx->words-1))*4); 1160 DPRINTK("size: %d, len:%d\n",size,skb->len); 1161 if (aal5) 1162 writel(skb->len,tx->send+ 1163 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); 1164 j = j >> 1; 1165 for (i = 0; i < j; i++) { 1166 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); 1167 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); 1168 dma_wr = (dma_wr+1) & (NR_DMA_TX-1); 1169 } 1170 ENI_PRV_POS(skb) = tx->tx_pos; 1171 ENI_PRV_SIZE(skb) = size; 1172 ENI_VCC(vcc)->txing += size; 1173 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); 1174 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); 1175 eni_out(dma_wr,MID_DMA_WR_TX); 1176 skb_queue_tail(&eni_dev->tx_queue,skb); 1177 queued++; 1178 return enq_ok; 1179 } 1180 1181 1182 static void poll_tx(struct atm_dev *dev) 1183 { 1184 struct eni_tx *tx; 1185 struct sk_buff *skb; 1186 enum enq_res res; 1187 int i; 1188 1189 DPRINTK(">poll_tx\n"); 1190 for (i = NR_CHAN-1; i >= 0; i--) { 1191 tx = &ENI_DEV(dev)->tx[i]; 1192 if (tx->send) 1193 while ((skb = skb_dequeue(&tx->backlog))) { 1194 res = do_tx(skb); 1195 if (res == enq_ok) continue; 1196 DPRINTK("re-queuing TX PDU\n"); 1197 skb_queue_head(&tx->backlog,skb); 1198 requeued++; 1199 if (res == enq_jam) return; 1200 break; 1201 } 1202 } 1203 } 1204 1205 1206 static void dequeue_tx(struct atm_dev *dev) 1207 { 1208 struct eni_dev *eni_dev; 1209 struct atm_vcc *vcc; 1210 struct sk_buff *skb; 1211 struct eni_tx *tx; 1212 1213 NULLCHECK(dev); 1214 eni_dev = ENI_DEV(dev); 1215 NULLCHECK(eni_dev); 1216 while ((skb = skb_dequeue(&eni_dev->tx_queue))) { 1217 vcc = ATM_SKB(skb)->vcc; 1218 NULLCHECK(vcc); 1219 tx = ENI_VCC(vcc)->tx; 1220 NULLCHECK(ENI_VCC(vcc)->tx); 1221 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), 1222 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); 1223 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == 1224 eni_in(MID_TX_DESCRSTART(tx->index))) { 1225 skb_queue_head(&eni_dev->tx_queue,skb); 1226 break; 1227 } 1228 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); 1229 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, 1230 PCI_DMA_TODEVICE); 1231 if (vcc->pop) vcc->pop(vcc,skb); 1232 else dev_kfree_skb_irq(skb); 1233 atomic_inc(&vcc->stats->tx); 1234 wake_up(&eni_dev->tx_wait); 1235 dma_complete++; 1236 } 1237 } 1238 1239 1240 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) 1241 { 1242 int i; 1243 1244 for (i = !ubr; i < NR_CHAN; i++) 1245 if (!eni_dev->tx[i].send) return eni_dev->tx+i; 1246 return NULL; 1247 } 1248 1249 1250 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, 1251 int *res,int unlimited) 1252 { 1253 static const int pre_div[] = { 4,16,128,2048 }; 1254 /* 2^(((x+2)^2-(x+2))/2+1) */ 1255 1256 if (unlimited) *pre = *res = 0; 1257 else { 1258 if (*pcr > 0) { 1259 int div; 1260 1261 for (*pre = 0; *pre < 3; (*pre)++) 1262 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; 1263 div = pre_div[*pre]**pcr; 1264 DPRINTK("min div %d\n",div); 1265 *res = TS_CLOCK/div-1; 1266 } 1267 else { 1268 int div; 1269 1270 if (!*pcr) *pcr = eni_dev->tx_bw+reserved; 1271 for (*pre = 3; *pre >= 0; (*pre)--) 1272 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; 1273 if (*pre < 3) (*pre)++; /* else fail later */ 1274 div = pre_div[*pre]*-*pcr; 1275 DPRINTK("max div %d\n",div); 1276 *res = (TS_CLOCK+div-1)/div-1; 1277 } 1278 if (*res < 0) *res = 0; 1279 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; 1280 } 1281 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); 1282 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); 1283 return 0; 1284 } 1285 1286 1287 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, 1288 int set_rsv,int set_shp) 1289 { 1290 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1291 struct eni_vcc *eni_vcc = ENI_VCC(vcc); 1292 struct eni_tx *tx; 1293 unsigned long size; 1294 void __iomem *mem; 1295 int rate,ubr,unlimited,new_tx; 1296 int pre,res,order; 1297 int error; 1298 1299 rate = atm_pcr_goal(txtp); 1300 ubr = txtp->traffic_class == ATM_UBR; 1301 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || 1302 rate >= ATM_OC3_PCR); 1303 if (!unlimited) { 1304 size = txtp->max_sdu*eni_dev->tx_mult/100; 1305 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= 1306 MID_MAX_BUF_SIZE) 1307 size = MID_MAX_BUF_SIZE; 1308 } 1309 else { 1310 if (eni_dev->ubr) { 1311 eni_vcc->tx = eni_dev->ubr; 1312 txtp->pcr = ATM_OC3_PCR; 1313 return 0; 1314 } 1315 size = UBR_BUFFER; 1316 } 1317 new_tx = !eni_vcc->tx; 1318 mem = NULL; /* for gcc */ 1319 if (!new_tx) tx = eni_vcc->tx; 1320 else { 1321 mem = eni_alloc_mem(eni_dev,&size); 1322 if (!mem) return -ENOBUFS; 1323 tx = alloc_tx(eni_dev,unlimited); 1324 if (!tx) { 1325 eni_free_mem(eni_dev,mem,size); 1326 return -EBUSY; 1327 } 1328 DPRINTK("got chan %d\n",tx->index); 1329 tx->reserved = tx->shaping = 0; 1330 tx->send = mem; 1331 tx->words = size >> 2; 1332 skb_queue_head_init(&tx->backlog); 1333 for (order = 0; size > (1 << (order+10)); order++); 1334 eni_out((order << MID_SIZE_SHIFT) | 1335 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), 1336 MID_TX_PLACE(tx->index)); 1337 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & 1338 MID_DESCR_START; 1339 } 1340 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); 1341 if (!error && txtp->min_pcr > rate) error = -EINVAL; 1342 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && 1343 txtp->max_pcr < rate) error = -EINVAL; 1344 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) 1345 error = -EINVAL; 1346 if (!error && set_rsv && !set_shp && rate < tx->shaping) 1347 error = -EINVAL; 1348 if (!error && !set_rsv && rate > tx->reserved && !ubr) 1349 error = -EINVAL; 1350 if (error) { 1351 if (new_tx) { 1352 tx->send = NULL; 1353 eni_free_mem(eni_dev,mem,size); 1354 } 1355 return error; 1356 } 1357 txtp->pcr = rate; 1358 if (set_rsv && !ubr) { 1359 eni_dev->tx_bw += tx->reserved; 1360 tx->reserved = rate; 1361 eni_dev->tx_bw -= rate; 1362 } 1363 if (set_shp || (unlimited && new_tx)) { 1364 if (unlimited && new_tx) eni_dev->ubr = tx; 1365 tx->prescaler = pre; 1366 tx->resolution = res; 1367 tx->shaping = rate; 1368 } 1369 if (set_shp) eni_vcc->tx = tx; 1370 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); 1371 return 0; 1372 } 1373 1374 1375 static int open_tx_first(struct atm_vcc *vcc) 1376 { 1377 ENI_VCC(vcc)->tx = NULL; 1378 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; 1379 ENI_VCC(vcc)->txing = 0; 1380 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); 1381 } 1382 1383 1384 static int open_tx_second(struct atm_vcc *vcc) 1385 { 1386 return 0; /* nothing to do */ 1387 } 1388 1389 1390 static void close_tx(struct atm_vcc *vcc) 1391 { 1392 DECLARE_WAITQUEUE(wait,current); 1393 struct eni_dev *eni_dev; 1394 struct eni_vcc *eni_vcc; 1395 1396 eni_vcc = ENI_VCC(vcc); 1397 if (!eni_vcc->tx) return; 1398 eni_dev = ENI_DEV(vcc->dev); 1399 /* wait for TX queue to drain */ 1400 DPRINTK("eni_close: waiting for TX ...\n"); 1401 add_wait_queue(&eni_dev->tx_wait,&wait); 1402 set_current_state(TASK_UNINTERRUPTIBLE); 1403 for (;;) { 1404 int txing; 1405 1406 tasklet_disable(&eni_dev->task); 1407 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; 1408 tasklet_enable(&eni_dev->task); 1409 if (!txing) break; 1410 DPRINTK("%d TX left\n",eni_vcc->txing); 1411 schedule(); 1412 set_current_state(TASK_UNINTERRUPTIBLE); 1413 } 1414 set_current_state(TASK_RUNNING); 1415 remove_wait_queue(&eni_dev->tx_wait,&wait); 1416 if (eni_vcc->tx != eni_dev->ubr) { 1417 /* 1418 * Looping a few times in here is probably far cheaper than 1419 * keeping track of TX completions all the time, so let's poll 1420 * a bit ... 1421 */ 1422 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != 1423 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) 1424 schedule(); 1425 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); 1426 eni_vcc->tx->send = NULL; 1427 eni_dev->tx_bw += eni_vcc->tx->reserved; 1428 } 1429 eni_vcc->tx = NULL; 1430 } 1431 1432 1433 static int start_tx(struct atm_dev *dev) 1434 { 1435 struct eni_dev *eni_dev; 1436 int i; 1437 1438 eni_dev = ENI_DEV(dev); 1439 eni_dev->lost = 0; 1440 eni_dev->tx_bw = ATM_OC3_PCR; 1441 eni_dev->tx_mult = DEFAULT_TX_MULT; 1442 init_waitqueue_head(&eni_dev->tx_wait); 1443 eni_dev->ubr = NULL; 1444 skb_queue_head_init(&eni_dev->tx_queue); 1445 eni_out(0,MID_DMA_WR_TX); 1446 for (i = 0; i < NR_CHAN; i++) { 1447 eni_dev->tx[i].send = NULL; 1448 eni_dev->tx[i].index = i; 1449 } 1450 return 0; 1451 } 1452 1453 1454 /*--------------------------------- common ----------------------------------*/ 1455 1456 1457 #if 0 /* may become useful again when tuning things */ 1458 1459 static void foo(void) 1460 { 1461 printk(KERN_INFO 1462 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" 1463 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", 1464 tx_complete,dma_complete,queued,requeued,submitted,backlogged, 1465 rx_enqueued,rx_dequeued,putting,pushed); 1466 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); 1467 } 1468 1469 #endif 1470 1471 1472 static void bug_int(struct atm_dev *dev,unsigned long reason) 1473 { 1474 struct eni_dev *eni_dev; 1475 1476 DPRINTK(">bug_int\n"); 1477 eni_dev = ENI_DEV(dev); 1478 if (reason & MID_DMA_ERR_ACK) 1479 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1480 "error\n",dev->number); 1481 if (reason & MID_TX_IDENT_MISM) 1482 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " 1483 "mismatch\n",dev->number); 1484 if (reason & MID_TX_DMA_OVFL) 1485 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1486 "overflow\n",dev->number); 1487 EVENT("---dump ends here---\n",0,0); 1488 printk(KERN_NOTICE "---recent events---\n"); 1489 event_dump(); 1490 } 1491 1492 1493 static irqreturn_t eni_int(int irq,void *dev_id,struct pt_regs *regs) 1494 { 1495 struct atm_dev *dev; 1496 struct eni_dev *eni_dev; 1497 u32 reason; 1498 1499 DPRINTK(">eni_int\n"); 1500 dev = dev_id; 1501 eni_dev = ENI_DEV(dev); 1502 reason = eni_in(MID_ISA); 1503 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); 1504 /* 1505 * Must handle these two right now, because reading ISA doesn't clear 1506 * them, so they re-occur and we never make it to the tasklet. Since 1507 * they're rare, we don't mind the occasional invocation of eni_tasklet 1508 * with eni_dev->events == 0. 1509 */ 1510 if (reason & MID_STAT_OVFL) { 1511 EVENT("stat overflow\n",0,0); 1512 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; 1513 } 1514 if (reason & MID_SUNI_INT) { 1515 EVENT("SUNI int\n",0,0); 1516 dev->phy->interrupt(dev); 1517 #if 0 1518 foo(); 1519 #endif 1520 } 1521 spin_lock(&eni_dev->lock); 1522 eni_dev->events |= reason; 1523 spin_unlock(&eni_dev->lock); 1524 tasklet_schedule(&eni_dev->task); 1525 return IRQ_HANDLED; 1526 } 1527 1528 1529 static void eni_tasklet(unsigned long data) 1530 { 1531 struct atm_dev *dev = (struct atm_dev *) data; 1532 struct eni_dev *eni_dev = ENI_DEV(dev); 1533 unsigned long flags; 1534 u32 events; 1535 1536 DPRINTK("eni_tasklet (dev %p)\n",dev); 1537 spin_lock_irqsave(&eni_dev->lock,flags); 1538 events = xchg(&eni_dev->events,0); 1539 spin_unlock_irqrestore(&eni_dev->lock,flags); 1540 if (events & MID_RX_DMA_COMPLETE) { 1541 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); 1542 dequeue_rx(dev); 1543 EVENT("dequeue_rx done, starting poll_rx\n",0,0); 1544 poll_rx(dev); 1545 EVENT("poll_rx done\n",0,0); 1546 /* poll_tx ? */ 1547 } 1548 if (events & MID_SERVICE) { 1549 EVENT("INT: service, starting get_service\n",0,0); 1550 get_service(dev); 1551 EVENT("get_service done, starting poll_rx\n",0,0); 1552 poll_rx(dev); 1553 EVENT("poll_rx done\n",0,0); 1554 } 1555 if (events & MID_TX_DMA_COMPLETE) { 1556 EVENT("INT: TX DMA COMPLETE\n",0,0); 1557 dequeue_tx(dev); 1558 } 1559 if (events & MID_TX_COMPLETE) { 1560 EVENT("INT: TX COMPLETE\n",0,0); 1561 tx_complete++; 1562 wake_up(&eni_dev->tx_wait); 1563 /* poll_rx ? */ 1564 } 1565 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { 1566 EVENT("bug interrupt\n",0,0); 1567 bug_int(dev,events); 1568 } 1569 poll_tx(dev); 1570 } 1571 1572 1573 /*--------------------------------- entries ---------------------------------*/ 1574 1575 1576 static const char *media_name[] __devinitdata = { 1577 "MMF", "SMF", "MMF", "03?", /* 0- 3 */ 1578 "UTP", "05?", "06?", "07?", /* 4- 7 */ 1579 "TAXI","09?", "10?", "11?", /* 8-11 */ 1580 "12?", "13?", "14?", "15?", /* 12-15 */ 1581 "MMF", "SMF", "18?", "19?", /* 16-19 */ 1582 "UTP", "21?", "22?", "23?", /* 20-23 */ 1583 "24?", "25?", "26?", "27?", /* 24-27 */ 1584 "28?", "29?", "30?", "31?" /* 28-31 */ 1585 }; 1586 1587 1588 #define SET_SEPROM \ 1589 ({ if (!error && !pci_error) { \ 1590 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ 1591 udelay(10); /* 10 usecs */ \ 1592 } }) 1593 #define GET_SEPROM \ 1594 ({ if (!error && !pci_error) { \ 1595 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ 1596 udelay(10); /* 10 usecs */ \ 1597 } }) 1598 1599 1600 static int __devinit get_esi_asic(struct atm_dev *dev) 1601 { 1602 struct eni_dev *eni_dev; 1603 unsigned char tonga; 1604 int error,failed,pci_error; 1605 int address,i,j; 1606 1607 eni_dev = ENI_DEV(dev); 1608 error = pci_error = 0; 1609 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; 1610 SET_SEPROM; 1611 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { 1612 /* start operation */ 1613 tonga |= SEPROM_DATA; 1614 SET_SEPROM; 1615 tonga |= SEPROM_CLK; 1616 SET_SEPROM; 1617 tonga &= ~SEPROM_DATA; 1618 SET_SEPROM; 1619 tonga &= ~SEPROM_CLK; 1620 SET_SEPROM; 1621 /* send address */ 1622 address = ((i+SEPROM_ESI_BASE) << 1)+1; 1623 for (j = 7; j >= 0; j--) { 1624 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : 1625 tonga & ~SEPROM_DATA; 1626 SET_SEPROM; 1627 tonga |= SEPROM_CLK; 1628 SET_SEPROM; 1629 tonga &= ~SEPROM_CLK; 1630 SET_SEPROM; 1631 } 1632 /* get ack */ 1633 tonga |= SEPROM_DATA; 1634 SET_SEPROM; 1635 tonga |= SEPROM_CLK; 1636 SET_SEPROM; 1637 GET_SEPROM; 1638 failed = tonga & SEPROM_DATA; 1639 tonga &= ~SEPROM_CLK; 1640 SET_SEPROM; 1641 tonga |= SEPROM_DATA; 1642 SET_SEPROM; 1643 if (failed) error = -EIO; 1644 else { 1645 dev->esi[i] = 0; 1646 for (j = 7; j >= 0; j--) { 1647 dev->esi[i] <<= 1; 1648 tonga |= SEPROM_DATA; 1649 SET_SEPROM; 1650 tonga |= SEPROM_CLK; 1651 SET_SEPROM; 1652 GET_SEPROM; 1653 if (tonga & SEPROM_DATA) dev->esi[i] |= 1; 1654 tonga &= ~SEPROM_CLK; 1655 SET_SEPROM; 1656 tonga |= SEPROM_DATA; 1657 SET_SEPROM; 1658 } 1659 /* get ack */ 1660 tonga |= SEPROM_DATA; 1661 SET_SEPROM; 1662 tonga |= SEPROM_CLK; 1663 SET_SEPROM; 1664 GET_SEPROM; 1665 if (!(tonga & SEPROM_DATA)) error = -EIO; 1666 tonga &= ~SEPROM_CLK; 1667 SET_SEPROM; 1668 tonga |= SEPROM_DATA; 1669 SET_SEPROM; 1670 } 1671 /* stop operation */ 1672 tonga &= ~SEPROM_DATA; 1673 SET_SEPROM; 1674 tonga |= SEPROM_CLK; 1675 SET_SEPROM; 1676 tonga |= SEPROM_DATA; 1677 SET_SEPROM; 1678 } 1679 if (pci_error) { 1680 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " 1681 "(0x%02x)\n",dev->number,pci_error); 1682 error = -EIO; 1683 } 1684 return error; 1685 } 1686 1687 1688 #undef SET_SEPROM 1689 #undef GET_SEPROM 1690 1691 1692 static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base) 1693 { 1694 void __iomem *mac_base; 1695 int i; 1696 1697 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); 1698 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); 1699 return 0; 1700 } 1701 1702 1703 static int __devinit eni_do_init(struct atm_dev *dev) 1704 { 1705 struct midway_eprom __iomem *eprom; 1706 struct eni_dev *eni_dev; 1707 struct pci_dev *pci_dev; 1708 unsigned long real_base; 1709 void __iomem *base; 1710 unsigned char revision; 1711 int error,i,last; 1712 1713 DPRINTK(">eni_init\n"); 1714 dev->ci_range.vpi_bits = 0; 1715 dev->ci_range.vci_bits = NR_VCI_LD; 1716 dev->link_rate = ATM_OC3_PCR; 1717 eni_dev = ENI_DEV(dev); 1718 pci_dev = eni_dev->pci_dev; 1719 real_base = pci_resource_start(pci_dev, 0); 1720 eni_dev->irq = pci_dev->irq; 1721 error = pci_read_config_byte(pci_dev,PCI_REVISION_ID,&revision); 1722 if (error) { 1723 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n", 1724 dev->number,error); 1725 return -EINVAL; 1726 } 1727 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, 1728 PCI_COMMAND_MEMORY | 1729 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1730 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " 1731 "(0x%02x)\n",dev->number,error); 1732 return -EIO; 1733 } 1734 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", 1735 dev->number,revision,real_base,eni_dev->irq); 1736 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) { 1737 printk("\n"); 1738 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " 1739 "mapping\n",dev->number); 1740 return error; 1741 } 1742 eni_dev->base_diff = real_base - (unsigned long) base; 1743 /* id may not be present in ASIC Tonga boards - check this @@@ */ 1744 if (!eni_dev->asic) { 1745 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); 1746 if (readl(&eprom->magic) != ENI155_MAGIC) { 1747 printk("\n"); 1748 printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad " 1749 "magic - expected 0x%x, got 0x%x\n",dev->number, 1750 ENI155_MAGIC,(unsigned) readl(&eprom->magic)); 1751 return -EINVAL; 1752 } 1753 } 1754 eni_dev->phy = base+PHY_BASE; 1755 eni_dev->reg = base+REG_BASE; 1756 eni_dev->ram = base+RAM_BASE; 1757 last = MAP_MAX_SIZE-RAM_BASE; 1758 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { 1759 writel(0x55555555,eni_dev->ram+i); 1760 if (readl(eni_dev->ram+i) != 0x55555555) last = i; 1761 else { 1762 writel(0xAAAAAAAA,eni_dev->ram+i); 1763 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; 1764 else writel(i,eni_dev->ram+i); 1765 } 1766 } 1767 for (i = 0; i < last; i += RAM_INCREMENT) 1768 if (readl(eni_dev->ram+i) != i) break; 1769 eni_dev->mem = i; 1770 memset_io(eni_dev->ram,0,eni_dev->mem); 1771 /* TODO: should shrink allocation now */ 1772 printk("mem=%dkB (",eni_dev->mem >> 10); 1773 /* TODO: check for non-SUNI, check for TAXI ? */ 1774 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { 1775 printk(")\n"); 1776 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", 1777 dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); 1778 return -EINVAL; 1779 } 1780 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); 1781 if (error) return error; 1782 for (i = 0; i < ESI_LEN; i++) 1783 printk("%s%02X",i ? "-" : "",dev->esi[i]); 1784 printk(")\n"); 1785 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, 1786 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", 1787 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]); 1788 return suni_init(dev); 1789 } 1790 1791 1792 static int __devinit eni_start(struct atm_dev *dev) 1793 { 1794 struct eni_dev *eni_dev; 1795 1796 void __iomem *buf; 1797 unsigned long buffer_mem; 1798 int error; 1799 1800 DPRINTK(">eni_start\n"); 1801 eni_dev = ENI_DEV(dev); 1802 if (request_irq(eni_dev->irq,&eni_int,SA_SHIRQ,DEV_LABEL,dev)) { 1803 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", 1804 dev->number,eni_dev->irq); 1805 return -EAGAIN; 1806 } 1807 /* @@@ should release IRQ on error */ 1808 pci_set_master(eni_dev->pci_dev); 1809 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, 1810 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 1811 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1812 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" 1813 "master (0x%02x)\n",dev->number,error); 1814 return error; 1815 } 1816 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, 1817 END_SWAP_DMA))) { 1818 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " 1819 "(0x%02x)\n",dev->number,error); 1820 return error; 1821 } 1822 /* determine addresses of internal tables */ 1823 eni_dev->vci = eni_dev->ram; 1824 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; 1825 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; 1826 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; 1827 buf = eni_dev->service+NR_SERVICE*4; 1828 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", 1829 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, 1830 eni_dev->service,buf); 1831 spin_lock_init(&eni_dev->lock); 1832 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); 1833 eni_dev->events = 0; 1834 /* initialize memory management */ 1835 buffer_mem = eni_dev->mem - (buf - eni_dev->ram); 1836 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; 1837 eni_dev->free_list = (struct eni_free *) kmalloc( 1838 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL); 1839 if (!eni_dev->free_list) { 1840 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 1841 dev->number); 1842 return -ENOMEM; 1843 } 1844 eni_dev->free_len = 0; 1845 eni_put_free(eni_dev,buf,buffer_mem); 1846 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ 1847 /* 1848 * byte_addr free (k) 1849 * 0x00000000 512 VCI table 1850 * 0x00004000 496 RX DMA 1851 * 0x00005000 492 TX DMA 1852 * 0x00006000 488 service list 1853 * 0x00007000 484 buffers 1854 * 0x00080000 0 end (512kB) 1855 */ 1856 eni_out(0xffffffff,MID_IE); 1857 error = start_tx(dev); 1858 if (error) return error; 1859 error = start_rx(dev); 1860 if (error) return error; 1861 error = dev->phy->start(dev); 1862 if (error) return error; 1863 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | 1864 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, 1865 MID_MC_S); 1866 /* Tonga uses SBus INTReq1 */ 1867 (void) eni_in(MID_ISA); /* clear Midway interrupts */ 1868 return 0; 1869 } 1870 1871 1872 static void eni_close(struct atm_vcc *vcc) 1873 { 1874 DPRINTK(">eni_close\n"); 1875 if (!ENI_VCC(vcc)) return; 1876 clear_bit(ATM_VF_READY,&vcc->flags); 1877 close_rx(vcc); 1878 close_tx(vcc); 1879 DPRINTK("eni_close: done waiting\n"); 1880 /* deallocate memory */ 1881 kfree(ENI_VCC(vcc)); 1882 vcc->dev_data = NULL; 1883 clear_bit(ATM_VF_ADDR,&vcc->flags); 1884 /*foo();*/ 1885 } 1886 1887 1888 static int eni_open(struct atm_vcc *vcc) 1889 { 1890 struct eni_dev *eni_dev; 1891 struct eni_vcc *eni_vcc; 1892 int error; 1893 short vpi = vcc->vpi; 1894 int vci = vcc->vci; 1895 1896 DPRINTK(">eni_open\n"); 1897 EVENT("eni_open\n",0,0); 1898 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) 1899 vcc->dev_data = NULL; 1900 eni_dev = ENI_DEV(vcc->dev); 1901 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) 1902 set_bit(ATM_VF_ADDR,&vcc->flags); 1903 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) 1904 return -EINVAL; 1905 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, 1906 vcc->vci); 1907 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { 1908 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); 1909 if (!eni_vcc) return -ENOMEM; 1910 vcc->dev_data = eni_vcc; 1911 eni_vcc->tx = NULL; /* for eni_close after open_rx */ 1912 if ((error = open_rx_first(vcc))) { 1913 eni_close(vcc); 1914 return error; 1915 } 1916 if ((error = open_tx_first(vcc))) { 1917 eni_close(vcc); 1918 return error; 1919 } 1920 } 1921 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; 1922 if ((error = open_rx_second(vcc))) { 1923 eni_close(vcc); 1924 return error; 1925 } 1926 if ((error = open_tx_second(vcc))) { 1927 eni_close(vcc); 1928 return error; 1929 } 1930 set_bit(ATM_VF_READY,&vcc->flags); 1931 /* should power down SUNI while !ref_count @@@ */ 1932 return 0; 1933 } 1934 1935 1936 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) 1937 { 1938 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1939 struct eni_tx *tx = ENI_VCC(vcc)->tx; 1940 struct sk_buff *skb; 1941 int error,rate,rsv,shp; 1942 1943 if (qos->txtp.traffic_class == ATM_NONE) return 0; 1944 if (tx == eni_dev->ubr) return -EBADFD; 1945 rate = atm_pcr_goal(&qos->txtp); 1946 if (rate < 0) rate = -rate; 1947 rsv = shp = 0; 1948 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; 1949 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; 1950 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; 1951 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; 1952 if (!rsv && !shp) return 0; 1953 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); 1954 if (error) return error; 1955 if (shp && !(flgs & ATM_MF_IMMED)) return 0; 1956 /* 1957 * Walk through the send buffer and patch the rate information in all 1958 * segmentation buffer descriptors of this VCC. 1959 */ 1960 tasklet_disable(&eni_dev->task); 1961 skb_queue_walk(&eni_dev->tx_queue, skb) { 1962 void __iomem *dsc; 1963 1964 if (ATM_SKB(skb)->vcc != vcc) continue; 1965 dsc = tx->send+ENI_PRV_POS(skb)*4; 1966 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | 1967 (tx->prescaler << MID_SEG_PR_SHIFT) | 1968 (tx->resolution << MID_SEG_RATE_SHIFT), dsc); 1969 } 1970 tasklet_enable(&eni_dev->task); 1971 return 0; 1972 } 1973 1974 1975 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) 1976 { 1977 struct eni_dev *eni_dev = ENI_DEV(dev); 1978 1979 if (cmd == ENI_MEMDUMP) { 1980 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1981 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " 1982 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); 1983 dump(dev); 1984 return 0; 1985 } 1986 if (cmd == ENI_SETMULT) { 1987 struct eni_multipliers mult; 1988 1989 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1990 if (copy_from_user(&mult, arg, 1991 sizeof(struct eni_multipliers))) 1992 return -EFAULT; 1993 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || 1994 mult.tx > 65536 || mult.rx > 65536) 1995 return -EINVAL; 1996 if (mult.tx) eni_dev->tx_mult = mult.tx; 1997 if (mult.rx) eni_dev->rx_mult = mult.rx; 1998 return 0; 1999 } 2000 if (cmd == ATM_SETCIRANGE) { 2001 struct atm_cirange ci; 2002 2003 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) 2004 return -EFAULT; 2005 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && 2006 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) 2007 return 0; 2008 return -EINVAL; 2009 } 2010 if (!dev->phy->ioctl) return -ENOIOCTLCMD; 2011 return dev->phy->ioctl(dev,cmd,arg); 2012 } 2013 2014 2015 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname, 2016 void __user *optval,int optlen) 2017 { 2018 return -EINVAL; 2019 } 2020 2021 2022 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname, 2023 void __user *optval,int optlen) 2024 { 2025 return -EINVAL; 2026 } 2027 2028 2029 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) 2030 { 2031 enum enq_res res; 2032 2033 DPRINTK(">eni_send\n"); 2034 if (!ENI_VCC(vcc)->tx) { 2035 if (vcc->pop) vcc->pop(vcc,skb); 2036 else dev_kfree_skb(skb); 2037 return -EINVAL; 2038 } 2039 if (!skb) { 2040 printk(KERN_CRIT "!skb in eni_send ?\n"); 2041 if (vcc->pop) vcc->pop(vcc,skb); 2042 return -EINVAL; 2043 } 2044 if (vcc->qos.aal == ATM_AAL0) { 2045 if (skb->len != ATM_CELL_SIZE-1) { 2046 if (vcc->pop) vcc->pop(vcc,skb); 2047 else dev_kfree_skb(skb); 2048 return -EINVAL; 2049 } 2050 *(u32 *) skb->data = htonl(*(u32 *) skb->data); 2051 } 2052 submitted++; 2053 ATM_SKB(skb)->vcc = vcc; 2054 tasklet_disable(&ENI_DEV(vcc->dev)->task); 2055 res = do_tx(skb); 2056 tasklet_enable(&ENI_DEV(vcc->dev)->task); 2057 if (res == enq_ok) return 0; 2058 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); 2059 backlogged++; 2060 tasklet_schedule(&ENI_DEV(vcc->dev)->task); 2061 return 0; 2062 } 2063 2064 static void eni_phy_put(struct atm_dev *dev,unsigned char value, 2065 unsigned long addr) 2066 { 2067 writel(value,ENI_DEV(dev)->phy+addr*4); 2068 } 2069 2070 2071 2072 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) 2073 { 2074 return readl(ENI_DEV(dev)->phy+addr*4); 2075 } 2076 2077 2078 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) 2079 { 2080 struct hlist_node *node; 2081 struct sock *s; 2082 static const char *signal[] = { "LOST","unknown","okay" }; 2083 struct eni_dev *eni_dev = ENI_DEV(dev); 2084 struct atm_vcc *vcc; 2085 int left,i; 2086 2087 left = *pos; 2088 if (!left) 2089 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " 2090 "%d cps remaining\n",dev->number,signal[(int) dev->signal], 2091 eni_dev->mem >> 10,eni_dev->tx_bw); 2092 if (!--left) 2093 return sprintf(page,"%4sBursts: TX" 2094 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ 2095 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ 2096 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ 2097 !defined(CONFIG_ATM_ENI_BURST_TX_2W) 2098 " none" 2099 #endif 2100 #ifdef CONFIG_ATM_ENI_BURST_TX_16W 2101 " 16W" 2102 #endif 2103 #ifdef CONFIG_ATM_ENI_BURST_TX_8W 2104 " 8W" 2105 #endif 2106 #ifdef CONFIG_ATM_ENI_BURST_TX_4W 2107 " 4W" 2108 #endif 2109 #ifdef CONFIG_ATM_ENI_BURST_TX_2W 2110 " 2W" 2111 #endif 2112 ", RX" 2113 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ 2114 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ 2115 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ 2116 !defined(CONFIG_ATM_ENI_BURST_RX_2W) 2117 " none" 2118 #endif 2119 #ifdef CONFIG_ATM_ENI_BURST_RX_16W 2120 " 16W" 2121 #endif 2122 #ifdef CONFIG_ATM_ENI_BURST_RX_8W 2123 " 8W" 2124 #endif 2125 #ifdef CONFIG_ATM_ENI_BURST_RX_4W 2126 " 4W" 2127 #endif 2128 #ifdef CONFIG_ATM_ENI_BURST_RX_2W 2129 " 2W" 2130 #endif 2131 #ifndef CONFIG_ATM_ENI_TUNE_BURST 2132 " (default)" 2133 #endif 2134 "\n",""); 2135 if (!--left) 2136 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", 2137 "",eni_dev->tx_mult,eni_dev->rx_mult); 2138 for (i = 0; i < NR_CHAN; i++) { 2139 struct eni_tx *tx = eni_dev->tx+i; 2140 2141 if (!tx->send) continue; 2142 if (!--left) { 2143 return sprintf(page,"tx[%d]: 0x%ld-0x%ld " 2144 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, 2145 (unsigned long) (tx->send - eni_dev->ram), 2146 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, 2147 tx->reserved,tx->shaping, 2148 tx == eni_dev->ubr ? " (UBR)" : ""); 2149 } 2150 if (--left) continue; 2151 return sprintf(page,"%10sbacklog %u packets\n","", 2152 skb_queue_len(&tx->backlog)); 2153 } 2154 read_lock(&vcc_sklist_lock); 2155 for(i = 0; i < VCC_HTABLE_SIZE; ++i) { 2156 struct hlist_head *head = &vcc_hash[i]; 2157 2158 sk_for_each(s, node, head) { 2159 struct eni_vcc *eni_vcc; 2160 int length; 2161 2162 vcc = atm_sk(s); 2163 if (vcc->dev != dev) 2164 continue; 2165 eni_vcc = ENI_VCC(vcc); 2166 if (--left) continue; 2167 length = sprintf(page,"vcc %4d: ",vcc->vci); 2168 if (eni_vcc->rx) { 2169 length += sprintf(page+length,"0x%ld-0x%ld " 2170 "(%6ld bytes)", 2171 (unsigned long) (eni_vcc->recv - eni_dev->ram), 2172 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, 2173 eni_vcc->words*4); 2174 if (eni_vcc->tx) length += sprintf(page+length,", "); 2175 } 2176 if (eni_vcc->tx) 2177 length += sprintf(page+length,"tx[%d], txing %d bytes", 2178 eni_vcc->tx->index,eni_vcc->txing); 2179 page[length] = '\n'; 2180 read_unlock(&vcc_sklist_lock); 2181 return length+1; 2182 } 2183 } 2184 read_unlock(&vcc_sklist_lock); 2185 for (i = 0; i < eni_dev->free_len; i++) { 2186 struct eni_free *fe = eni_dev->free_list+i; 2187 unsigned long offset; 2188 2189 if (--left) continue; 2190 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; 2191 return sprintf(page,"free %p-%p (%6d bytes)\n", 2192 fe->start-offset,fe->start-offset+(1 << fe->order)-1, 2193 1 << fe->order); 2194 } 2195 return 0; 2196 } 2197 2198 2199 static const struct atmdev_ops ops = { 2200 .open = eni_open, 2201 .close = eni_close, 2202 .ioctl = eni_ioctl, 2203 .getsockopt = eni_getsockopt, 2204 .setsockopt = eni_setsockopt, 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 2213 static int __devinit 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 int error = -ENOMEM; 2219 2220 DPRINTK("eni_init_one\n"); 2221 2222 if (pci_enable_device(pci_dev)) { 2223 error = -EIO; 2224 goto out0; 2225 } 2226 2227 eni_dev = (struct eni_dev *) kmalloc(sizeof(struct eni_dev),GFP_KERNEL); 2228 if (!eni_dev) goto out0; 2229 if (!cpu_zeroes) { 2230 cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE, 2231 &zeroes); 2232 if (!cpu_zeroes) goto out1; 2233 } 2234 dev = atm_dev_register(DEV_LABEL,&ops,-1,NULL); 2235 if (!dev) goto out2; 2236 pci_set_drvdata(pci_dev, dev); 2237 eni_dev->pci_dev = pci_dev; 2238 dev->dev_data = eni_dev; 2239 eni_dev->asic = ent->driver_data; 2240 error = eni_do_init(dev); 2241 if (error) goto out3; 2242 error = eni_start(dev); 2243 if (error) goto out3; 2244 eni_dev->more = eni_boards; 2245 eni_boards = dev; 2246 return 0; 2247 out3: 2248 atm_dev_deregister(dev); 2249 out2: 2250 pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes); 2251 cpu_zeroes = NULL; 2252 out1: 2253 kfree(eni_dev); 2254 out0: 2255 return error; 2256 } 2257 2258 2259 static struct pci_device_id eni_pci_tbl[] = { 2260 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID, 2261 0, 0, 0 /* FPGA */ }, 2262 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID, 2263 0, 0, 1 /* ASIC */ }, 2264 { 0, } 2265 }; 2266 MODULE_DEVICE_TABLE(pci,eni_pci_tbl); 2267 2268 2269 static void __devexit eni_remove_one(struct pci_dev *pci_dev) 2270 { 2271 /* grrr */ 2272 } 2273 2274 2275 static struct pci_driver eni_driver = { 2276 .name = DEV_LABEL, 2277 .id_table = eni_pci_tbl, 2278 .probe = eni_init_one, 2279 .remove = __devexit_p(eni_remove_one), 2280 }; 2281 2282 2283 static int __init eni_init(void) 2284 { 2285 struct sk_buff *skb; /* dummy for sizeof */ 2286 2287 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) { 2288 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n", 2289 sizeof(skb->cb),sizeof(struct eni_skb_prv)); 2290 return -EIO; 2291 } 2292 return pci_register_driver(&eni_driver); 2293 } 2294 2295 2296 module_init(eni_init); 2297 /* @@@ since exit routine not defined, this module can not be unloaded */ 2298 2299 MODULE_LICENSE("GPL"); 2300